Powder feeding system, production system and control method of powder feeding system

Abstract

The present application discloses a powder feeding system, a production system, and a control method for a powder feeding system. The powder feeding system includes: a glove box; a temporary storage tank, the inlet of the temporary storage tank being connected to the outlet of the glove box; a screw feeder and a sending tank, the screw feeder being connected between the outlet of the temporary storage tank and the inlet of the sending tank for conveying the powder in the temporary storage tank to the sending tank, and the outlet of the sending tank being adapted to be connected to a pulping system. The powder feeding system is configured to be able to measure the weight of the powder conveyed by the screw feeder to the sending tank. In the above technical solution, not only can the powder in the temporary storage tank be automatically conveyed to the sending tank, but also the weight of the powder proportioned to the sending tank can be accurately measured, realizing highly automated powder proportioning, improving the proportioning efficiency, enabling rapid mass production, reducing the contact between personnel and the powder, and reducing the harm of the powder to health.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly to a powder feeding system, a production system, and a control method for the powder feeding system. Background Art

[0002] Currently, in the process of preparing dangerous powders in the lithium battery industry, there is a problem that the powdered materials are exposed when the bags are opened. This method is not applicable to powders with high risks such as toxic, flammable, and explosive powders. For example, when sulfide powders leak and react with water in the air to generate hydrogen sulfide, in the process of preparing solid-state battery powders, it is usually necessary to carry out metering and transportation in a closed space.

[0003] In the process of feeding, metering, and transporting powders in the traditional lithium battery industry, manual weighing is usually carried out first, and then fixed-packaging feeding is carried out. This method has low efficiency and cannot achieve large-scale mass production. Summary of the Invention

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. For this reason, the present application provides a powder feeding system, a production system including this powder feeding system, and a control method for this powder feeding system. The powder feeding system can improve the automation degree of batching and can quickly achieve mass production.

[0005] In a first aspect, an embodiment of the present application provides a powder feeding system, including: a glove box; a storage tank, the inlet of the storage tank is connected to the outlet of the glove box; a screw feeder and a sending tank, the screw feeder is connected between the outlet of the storage tank and the inlet of the sending tank for transporting the powder in the storage tank to the sending tank, and the outlet of the sending tank is adapted to be connected to a pulping system. The powder feeding system is configured to be able to measure the weight of the powder transported by the screw feeder to the sending tank.

[0006] In the above technical solution, by arranging a screw feeder between the storage tank and the sending tank, and transporting the powder in the storage tank to the sending tank through the screw feeder, and being able to measure the weight of the powder transported by the screw feeder to the sending tank. In this way, not only can the powder in the storage tank be automatically transported to the sending tank, but also the weight of the powder for batching to the sending tank can be accurately measured, realizing highly automated batching of the powder and improving the batching efficiency. Compared with the batching method of manual weighing first and then fixed-packaging feeding, this embodiment not only has a high degree of batching automation and can quickly achieve mass production, but also can reduce the contact between personnel and the powder and reduce the harm of the powder to health.

[0007] In some embodiments, the glove box includes: a box body and a first inner lining, the first inner lining is arranged inside the box body, and the inner side of the first inner lining defines a first storage cavity of the glove box.

[0008] In the above technical solution, since a first inner lining is provided inside the box body, the first inner lining can further enhance the structural strength of the glove box. And since the first storage cavity is located inside the first inner lining, in this way, the first inner lining can isolate the powder material in the first storage cavity from the box body, reducing the direct contact between the powder material and the box body, thereby protecting the box body and reducing the probability of the box body being corroded by the powder material, and improving the service life of the glove box.

[0009] In some embodiments, the powder feeding system further includes: a first vibration driving device, and the first vibration driving device is used to drive the first inner lining to vibrate.

[0010] In the above technical solution, due to the setting of the first vibration driving device, by driving the first inner lining to vibrate, the powder material adsorbed or adhered to the first inner lining can be shaken off, reducing the residual amount of powder material in the glove box and reducing the impact on the health of the operating personnel.

[0011] In some embodiments, the first inner lining is an elastic member, and a first gap space is formed between the box body and the first inner lining. The first vibration driving device includes a first air pipe and a first air flow driving mechanism. One end of the first air pipe is connected to the first air flow driving mechanism and the other end is communicated with the first gap space. The first air flow driving mechanism blows gas into the first gap space through the first air pipe and extracts the gas in the first gap space.

[0012] In the above technical solution, since the first inner lining is an elastic member and cooperates with the box body to define the first gap space, and the first air flow driving structure is used to extract or pump gas into the first gap space, realizing the change of the pressure in the first gap space, so that the first inner lining can shake under the action of the changing pressure, further shaking off the powder material on the first inner lining, and further reducing the impact of the residual powder material in the glove box on the health of the operating personnel.

[0013] In some embodiments, a first air inlet and a first air outlet which are arranged at intervals and communicated with the first gap space are formed on the box body. The first air flow driving mechanism includes: a first fan and a first vacuum pump. The outlet of the first fan is connected to the first air inlet, and the inlet of the first vacuum pump is connected to the first air outlet.

[0014] In the above technical solution, since the first fan and the first vacuum pump respectively arranged and communicated with the first gap space are provided, it is convenient to input and extract gas from the first gap space, the structure is simple, the control is convenient, and the shaking of the first inner lining can be conveniently and efficiently realized, improving the shaking efficiency of the powder material on the first inner lining.

[0015] In some embodiments, the first fan and the first vacuum pump are configured to operate alternately to make the first inner lining shake.

[0016] In the above technical solution, since the first fan and the first vacuum pump are configured to operate alternately, the shaking of the first inner lining can be achieved conveniently and efficiently, and the efficiency of shaking off the powder on the first inner lining can be improved.

[0017] In some embodiments, the first inner lining is a non-metallic part.

[0018] In the above technical solution, since the first inner lining is a non-metallic part, the probability of the first inner lining generating static electricity to adsorb powder can be reduced, and the risk of metal particles entering the powder due to the friction between the first inner lining and the powder can also be reduced. When the powder feeding system is used in a production system for manufacturing batteries, the battery performance can be ensured.

[0019] In some embodiments, the first inner lining is a fluororubber part.

[0020] In the above technical solution, by setting the first inner lining as a fluororubber part, the corrosion resistance and sealing performance of the first inner lining can be improved, the probability of powder adhering to the first inner lining can be reduced, and the service life of the first inner lining can be extended.

[0021] In some embodiments, the powder feeding system further includes: a first purging device, the first purging device includes: a first air pipe and a first dust removal valve connected in series on the first air pipe, and one end of the first air pipe extends into the first storage cavity of the glove box for purging the powder on the inner wall of the first storage cavity.

[0022] In the above technical solution, since the first purging device is provided for purging the powder on the inner wall of the first storage cavity, the probability of powder adhering in the glove box can be reduced, the service life of the glove box can be extended, the waste of powder can be reduced, and the risk of powder contacting the operator can be reduced.

[0023] In some embodiments, the first dust removal valve is arranged outside the glove box.

[0024] In the above technical solution, since the first dust removal valve is arranged outside the glove box, the first dust removal valve can be directly operated outside the glove box to control the start and stop of the first purging device, improving the operation convenience, facilitating the inspection and maintenance of the first dust removal valve, and also enabling the first dust removal valve not to occupy the space inside the glove box, thus improving the space utilization rate inside the glove box.

[0025] In some embodiments, the first dust removal valve is formed as a foot valve.

[0026] In the above technical solution, by setting the first dust removal valve as a foot valve, the foot valve will only act when actively stepped on. This can not only reduce the probability of accidental touch and the risk of misoperation, but also reduce hand fatigue and is suitable for long-term operation. In addition, by adjusting the stepping force and stroke, the gas flow rate and on-off can be flexibly adjusted to keep the powder feeding system running well.

[0027] In some embodiments, the powder feeding system further includes: a first detection device, the first detection device is used to detect the air pressure in the first storage chamber, and the first detection device is communicatively connected to the first purge device.

[0028] In the above technical solution, by providing a first detection device for detecting the air pressure in the first storage chamber, not only can the pressure in the glove box be monitored in real time to maintain the pressure in the glove box within an appropriate range, but the purge operation of the first purge device can also be automatically adjusted according to the air pressure in the first storage chamber, thereby reducing manual intervention, reducing the probability of misoperation, and improving overall production efficiency.

[0029] In some embodiments, the temporary storage tank includes a tank body and a second liner, the second liner is disposed within the tank body, and the inner side of the second liner defines a second storage cavity of the temporary storage tank.

[0030] In the above technical solution, by dividing the temporary storage tank into an inner and outer arranged tank body and a second lining, the second lining can enhance the structural strength of the temporary storage tank. Since the second storage cavity is formed on the inner side of the second lining, the second lining can isolate the powder in the second storage cavity from the tank body, reducing direct contact between the powder and the tank body, thereby protecting the tank body, reducing the probability of the tank body being corroded by the powder, and improving the service life of the temporary storage tank.

[0031] In some embodiments, the powder feeding system further includes: a second vibration driving device, the second vibration driving device is used to drive the second liner to vibrate.

[0032] In the above technical solution, since the second vibration driving device is provided, the powder adsorbed or adhered to the second liner can be shaken off by driving the second liner to vibrate, thereby reducing the residual powder in the temporary storage tank and reducing the loss of powder.

[0033] In some embodiments, the powder feeding system also includes: a second purge device, the second purge device includes: a second air pipe and a second dust removal valve connected in series to the second air pipe, the second air pipe is connected to the second storage chamber of the temporary storage tank, and is used to transport gas to the second storage chamber to purge the powder on the inner wall of the second storage chamber.

[0034] In the above technical solution, by providing a second purge device for purging the powder on the inner wall of the second storage chamber, the probability of powder adhering to the temporary storage tank can be reduced, the service life of the temporary storage tank can be improved, the waste of powder can be reduced, and the risk of powder contact with operators can be reduced.

[0035] In some embodiments, the powder feeding system further includes: a third purging device, which includes: a third air pipe and a third dust removal valve connected in series on the third air pipe. The third air pipe is connected to the third storage chamber of the sending tank and is used to convey gas to the third storage chamber to purge the powder on the inner wall of the third storage chamber.

[0036] In the above technical solution, by providing the third purging device for purging the powder on the inner wall of the third storage chamber, the probability of powder adhering in the sending tank can be reduced, the service life of the sending tank can be extended, powder waste can be reduced, the risk of powder contacting the operators can be lowered, and the third purging device can also be used as an energy source to convey the powder in the sending tank to the pulping system, improving the conveying efficiency.

[0037] In some embodiments, the powder feeding system further includes: a first weighing device for detecting the weight of the temporary storage tank.

[0038] In the above technical solution, by providing the first weighing device for detecting the weight of the temporary storage tank, not only can the weight change of the material in the temporary storage tank be measured in real time and accurately, realizing a stable and accurate powder supply to the downstream process, improving the production consistency and product quality, but also the automation degree of the production process can be increased, manual intervention can be reduced, and the production efficiency can be improved.

[0039] In some embodiments, a first discharge pipe is provided at the bottom of the glove box, and a first discharge valve is connected in series on the first discharge pipe. A first feed pipe connected to the first discharge pipe is provided at the top of the temporary storage tank, and a first feed valve is connected in series on the first feed pipe. The powder feeding system is configured to: be suitable for allowing the powder in the glove box to fall into the temporary storage tank under the action of gravity.

[0040] In the above technical solution, by using gravity to directly let the powder in the glove box fall into the temporary storage tank without the need for additional power equipment to drive the transmission, the equipment cost can be reduced, energy consumption can be decreased, the powder transmission process can be simplified, the transmission efficiency can be improved, and the powder can be quickly and smoothly transferred from the glove box to the temporary storage tank. By providing the first feed valve and the first discharge valve, the powder can fall into the temporary storage tank according to a predetermined time, predetermined amount, and predetermined speed according to the process requirements, increasing the automation degree of the production process and meeting the process requirements of feeding.

[0041] In some embodiments, the first feed pipe and the first discharge pipe can slide relative to each other in the vertical direction and are connected by insertion.

[0042] In the above technical solution, since the first feed pipe and the first discharge pipe are slidable and inserted in the vertical direction, not only can the assembly error between the first feed pipe and the first discharge pipe be reduced, but also the influence on the weighing sensor of the glove box or the temporary storage tank caused by the mutual pulling between the first feed pipe and the first discharge pipe during detection can be reduced, the detection accuracy of the weighing sensor can be improved, a stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system, and the consistency of production and the product quality can be ensured.

[0043] In some embodiments, the powder feeding system further includes: a first sleeve, the first sleeve is sleeved outside the first feed pipe and the first discharge pipe, the upper end of the first sleeve is fixedly and sealingly connected to the first discharge pipe, the lower end of the first sleeve is fixedly and sealingly connected to the first feed pipe, and the first sleeve is configured to be telescopic in the vertical direction.

[0044] In the above technical solution, by providing the first sleeve sleeved outside the first feed pipe and the first discharge pipe, the connection position between the first feed pipe and the first discharge pipe can be sealed through the first sleeve, and the probability of leakage at the connection position between the first feed pipe and the first discharge pipe can be reduced, so as to ensure the sealing performance of the connection position on the premise of realizing the relative sliding of the first feed pipe and the first discharge pipe in the vertical direction.

[0045] In some embodiments, a first inflation chamber is defined by the cooperation between the first sleeve and the first feed pipe and the first discharge pipe, the first inflation chamber is communicated with the first feed pipe and the first discharge pipe, a first inflation port communicated with the first inflation chamber is formed on the first sleeve, and the first inflation port is configured to be communicated with a gas source.

[0046] In the above technical solution, since the first inflation port communicated with the gas source is formed on the first sleeve, by inflating the first inflation chamber through the first inflation port, the probability of powder leakage from the gap between the first feed pipe and the first discharge pipe can be reduced, and the sealing performance between the first feed pipe and the first discharge pipe can be improved.

[0047] In some embodiments, the first sleeve is a corrugated pipe.

[0048] In the above technical solution, since the first sleeve is a corrugated pipe, not only can the first sleeve be telescopic in the vertical direction to adapt to the relative displacement between the first feed pipe and the first discharge pipe, but also it can have good sealing performance, reduce the risk of leakage at the connection position, and the structure of the corrugated pipe is simple and convenient to install.

[0049] In some embodiments, the first sleeve is a rubber part.

[0050] In the above technical solution, since the first sleeve is a rubber part, the rubber part has good deformability, chemical stability and wear resistance, which can endow the first sleeve with good deformation ability and corrosion resistance.

[0051] In some embodiments, the wall thickness of the first sleeve is less than or equal to 2 mm.

[0052] In the above technical solution, since the wall thickness of the first sleeve is less than or equal to 2 mm, not only can the material usage of the first sleeve be reduced, the weight of the first sleeve be lightened, but also the pulling force between the first feed pipe and the first discharge pipe can be reduced, and the detection accuracy of the weighing sensor can be improved.

[0053] In some embodiments, the powder feeding system is configured to: when the glove box discharges materials into the temporary storage tank, introduce gas into the first inflation cavity through the first inflation port.

[0054] In the above technical solution, since gas is introduced into the first inflation cavity when the glove box discharges materials into the temporary storage tank, the gas in the first inflation cavity can enter the inside of the first feed pipe, so that the powder can smoothly fall into the temporary storage tank, reducing the probability of powder leaking into the first inflation cavity.

[0055] In some embodiments, the overlapping length of the first feed pipe and the first discharge pipe in the vertical direction and the ratio of the diameter of the first feed pipe or the first discharge pipe is greater than or equal to 1 and less than or equal to 1.5.

[0056] In the above technical solution, since the overlapping length of the first feed pipe and the first discharge pipe is 1 - 1.5 times the diameter of the first feed pipe or the first discharge pipe, the overlapping length of the first feed pipe and the first discharge pipe can be made long enough to reduce the risk of the first feed pipe and the first discharge pipe separating in the vertical direction and improve the connection reliability between the first feed pipe and the first discharge pipe.

[0057] In some embodiments, a second discharge pipe extending downward is connected to the outlet of the screw feeder. A second discharge valve is connected in series on the second discharge pipe. A second feed pipe connected to the second discharge pipe is provided at the top of the sending tank. A second feed valve is connected in series on the second feed pipe. The powder feeding system is configured to: be adapted to make the powder at the outlet of the screw feeder fall into the sending tank under the action of gravity.

[0058] In the above technical solution, by using gravity to directly let the powder in the screw feeder fall into the sending tank, no additional power equipment is required to drive the transmission, which can reduce the equipment cost, reduce energy consumption, simplify the powder transmission process, improve the transmission efficiency, enable the powder to quickly and smoothly transfer from the screw feeder to the sending tank. By setting the second feed valve and the second discharge valve, the powder can fall into the sending tank according to the predetermined time, predetermined material quantity, and predetermined speed according to the process requirements, improving the automation degree of the production process and meeting the process requirements of feeding.

[0059] In some embodiments, the second feed pipe and the second discharge pipe are relatively slidable in the up-and-down direction and are connected in a plug-in manner.

[0060] In the above technical solution, since the second feed pipe and the second discharge pipe are slidable and plug-connected in the up-and-down direction, not only can the assembly error between the second feed pipe and the second discharge pipe be reduced, but also the influence on the weighing sensor of the sending tank during detection caused by the mutual pulling between the second feed pipe and the second discharge pipe can be reduced, the detection accuracy of the weighing sensor can be improved, stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system, and the consistency of production and the product quality can be ensured.

[0061] In some embodiments, the powder feeding system further includes: a second sleeve, the second sleeve is sleeved outside the second feed pipe and the second discharge pipe, the upper end of the second sleeve is fixedly and sealingly connected to the second discharge pipe, the lower end of the second sleeve is fixedly and sealingly connected to the second feed pipe, and the second sleeve is telescopic in the up-and-down direction. The second sleeve and the second feed pipe and the second discharge pipe cooperate to define a second inflation chamber, the second inflation chamber is communicated with the second feed pipe and the second discharge pipe, a second inflation port communicated with the second inflation chamber is formed on the second sleeve, and the second inflation port is configured to be communicated with a gas source.

[0062] In the above technical solution, by arranging the second sleeve to be sleeved outside the second feed pipe and the second discharge pipe, the connection position of the second feed pipe and the second discharge pipe can be sealed through the second sleeve, and the probability of leakage at the connection position of the second feed pipe and the second discharge pipe can be reduced, and the sealing performance of the connection position can be ensured. Since a second inflation port communicated with the gas source is formed on the second sleeve, by inflating the second inflation chamber through the second inflation port, the probability of powder leakage from the gap between the second feed pipe and the second discharge pipe can be reduced, and the sealing performance between the second feed pipe and the second discharge pipe can be improved.

[0063] In a second aspect, an embodiment of the present application provides a production system, and the production system includes: a powder feeding system according to the first aspect of the present application; a pulping system, the pulping system includes a pulping tank, and the outlet of the sending tank is communicated with the powder inlet of the pulping tank.

[0064] In the above technical solution, since the production system is provided with the above-mentioned powder feeding system, and the powder feeding system arranges a screw feeder between the storage tank and the sending tank and conveys the powder in the storage tank into the sending tank through the screw feeder, not only can the powder in the storage tank be automatically conveyed into the sending tank, but also the weight of the powder fed into the sending tank for batching can be accurately measured, highly automated batching of the powder can be achieved, and the batching efficiency can be improved.

[0065] In some embodiments, the number of pulping tanks is multiple, and the powder inlets of the multiple pulping tanks are all connected to the outlet of the sending tank.

[0066] In the above technical solution, multiple pulping tanks are connected to the sending tank, so that one sending tank can feed multiple pulping tanks, thereby improving the equipment utilization rate of the sending tank, improving the comprehensive equipment efficiency of the powder feeding system, and improving the production efficiency of the production system.

[0067] In the third aspect, an embodiment of the present application provides a control method for a powder feeding system, which is a powder feeding system according to the first aspect of the present application. The control method includes: S11, confirming receipt of a batching instruction to convey powder to a sending tank; S12, controlling a screw feeder to convey powder of a first target weight from a temporary storage tank to a sending tank.

[0068] In the above technical solution, the powder feeding system confirms that it has received the batching instruction to convey the powder to the sending tank; then it controls the screw feeder to convey the first target weight of powder from the temporary storage tank to the sending tank. Thus, not only can the screw feeder realize the automatic conveying of the powder, but also the delivery amount of the powder can be accurately controlled, and then the amount of powder delivered from the sending tank to the pulping system can be accurately controlled. Compared with the batching method of manual weighing and then feeding the powder into the glove box in fixed packages, this embodiment not only has a high degree of batching automation and can quickly realize mass production, but also can reduce the contact between personnel and powder, and reduce the harm of powder to health.

[0069] In some embodiments, step S12 includes: S121, controlling the screw feeder to rotate at a first speed to convey the powder; S122, confirming that the weight of the conveyed powder reaches a first preset weight, and the first preset weight is less than the first target weight; S123, controlling the screw feeder to rotate at a second speed to convey the powder, and the second speed is less than the first speed.

[0070] In the above technical solution, the screw feeder is controlled to rotate the ingredients at a high first speed until the weight of the ingredients reaches a first preset weight, and then rotates the ingredients at a lower second speed. This not only achieves fast ingredient batching, but also facilitates accurate ingredient batching.

[0071] In some embodiments, after S123 , the control method further includes: S124 , introducing gas into the temporary storage tank to purge the temporary storage tank and the screw feeder; S125 , confirming that the weight of the delivered powder reaches the first target weight.

[0072] In the above technical solution, after the powder is conveyed to the sending tank through the screw feeder, the temporary storage tank and the screw feeder are purged until the powder conveyed to the sending tank reaches the first target weight. In this way, not only can the predetermined weight of powder be accurately conveyed, but the probability of powder adhering to the temporary storage tank and the screw feeder can also be reduced, thereby increasing the service life of the temporary storage tank and the screw feeder, reducing the waste of powder, and reducing the risk of powder contact with operators.

[0073] In some embodiments, after step S12, the control method further includes: S13, confirming receipt of a feeding instruction for feeding the pulping system; S14, driving the sending tank to vibrate and introducing conveying gas into the sending tank to convey the powder in the sending tank to the pulping system.

[0074] In the above technical solution, after receiving the feeding instruction for feeding the pulping system, by driving the sending tank to vibrate and introducing compressed nitrogen for conveying into the sending tank, the powder can be premixed with the compressed nitrogen, improving the conveying efficiency of the powder and the subsequent pulping efficiency of the pulping system.

[0075] Fourthly, an embodiment of the present application provides a control method for a powder feeding system. The powder feeding system is the powder feeding system according to the first aspect of the present application. The glove box includes a box body and a first lining provided in the box body. The control method includes: S21, confirming that the glove box has completed discharging into the temporary storage tank; S22, driving the first lining to vibrate; S23, purging the inner wall of the glove box.

[0076] In the above technical solution, after confirming that the glove box has completed discharging, the first lining is first driven to vibrate so that the powder adhering to the first lining falls into the temporary storage tank, and then the inner wall of the glove box is purged to further clean the residual powder in the glove box. Thus, the residual powder in the glove box can be reduced, the powder loss can be reduced, and the health risk of the operator caused by contacting the powder can be reduced.

[0077] In some embodiments, a first gap space is formed between the box body and the first lining. Step S22 includes: S221, introducing gas into the first gap space and maintaining it for a first preset time; S222, sucking the gas in the first gap space and maintaining it for a second preset time; S223, detecting whether the weight of the powder falling from the glove box into the temporary storage tank reaches a second target weight. If so, the discharging ends; if not, S221 is executed.

[0078] In the above technical solution, by first introducing gas into the first gap space and then sucking the gas in the first gap space, the first lining can be shaken to shake off the powder adhering to the first lining. Then, the weight of the powder falling from the glove box into the temporary storage tank is detected to judge the residual amount of the powder in the glove box, and further judge whether the powder in the glove box is completely shaken off. Thus, it can be ensured that the powder in the glove box completely falls into the temporary storage tank.

[0079] In some embodiments, in step S223, when the weight of the powder falling into the temporary storage tank does not reach the second target weight, the control method further includes: judging whether the total running time of step S22 is greater than a third preset time. If not, S221 is executed; if so, an alarm message of discharging timeout is issued.

[0080] In the above technical solution, when the weight of the powder material falling into the temporary storage tank does not reach the second target weight and the total running time of step S22 is greater than the third preset time, an alarm message of material falling timeout is sent, which can prompt the operator that the material falling is abnormal and reduce the occurrence of the situation that the first inner lining vibrates for dust removal continuously due to the weight of the powder material falling into the temporary storage tank not reaching the second target weight.

[0081] In some embodiments, step S23 includes: S231, detecting and confirming that the pressure in the glove box is less than the first preset pressure; S232, introducing a purging gas into the glove box; S233, confirming that the pressure in the glove box is greater than the first preset pressure and lasts for the first time; S234, stopping introducing the purging gas into the glove box; S235, detecting and judging whether the pressure in the glove box is less than the second preset pressure, where the second preset pressure is less than the first preset pressure. If so, the purging ends; if not, execute S232.

[0082] In the above technical solution, not only can the purging and cleaning of the glove box be achieved, reducing the residual powder on the inner wall of the glove box, but also the pressure in the glove box can be kept in a negative pressure state after purging, ensuring the normal operation of the glove box.

[0083] In some embodiments, step S231 includes: S2311, detecting the pressure in the glove box; S2312, comparing the detected pressure of the glove box with the first preset pressure and the third preset pressure, where the third preset pressure is less than the second preset pressure and the first preset pressure. If the pressure in the glove box is less than the third preset pressure, then execute S2313; if the pressure in the glove box is greater than the third preset pressure and less than the first preset pressure, then execute S232; S2313, closing the first dust removal fan connected to the glove box and opening the first dust removal valve connected to the glove box; S2314, after detecting and confirming that the pressure in the glove box is greater than the second preset pressure, then execute S232.

[0084] In the above technical solution, when the pressure in the glove box is lower than the third preset pressure, the first dust removal fan is not started and only the first dust removal valve is opened, which can increase the pressure in the glove box and reduce the occurrence of the situation that the pressure in the glove box is too low due to directly purging the glove box, ensuring the normal operation of the glove box.

[0085] In a fifth aspect, an embodiment of the present application provides a control method for a powder feeding system. The powder feeding system is the powder feeding system according to the first aspect of the present application. The control method includes: S31, obtaining the initial weight of the temporary storage tank; S32, controlling the glove box to feed materials into the temporary storage tank; S33, obtaining the weight of the temporary storage tank after the glove box feeds materials into the temporary storage tank as the first weight; S34, controlling the temporary storage tank to feed materials to the sending tank; S35, obtaining the weight after the temporary storage tank feeds materials as the second weight; S36, confirming that the difference between the second weight and the initial weight is within a preset range; S37, ending the feeding. When obtaining the weight of the temporary storage tank, the pressure in the temporary storage tank is adjusted to the preset weighing pressure.

[0086] In the above technical solution, the weight of the temporary storage tank under the preset weighing pressure is obtained before, after, and after the temporary storage tank feeds materials to the sending tank, respectively, which can significantly reduce the weighing error caused by different internal pressures of the temporary storage tank. Thus, the weight of the powder transported from the glove box to the sending tank can be accurately measured. Moreover, during the entire transportation process of the powder feeding system, the adhesion amount of the powder in the glove box and the temporary storage tank can be monitored and reduced to the maximum extent, reducing powder loss.

[0087] In some embodiments, step S31 includes: S311, introducing an inert gas into the temporary storage tank to displace the air in the temporary storage tank; S312, closing the first discharge valve of the glove box and opening the first feed valve of the temporary storage tank; S313, adjusting the air pressure in the temporary storage tank to the preset weighing pressure; S314, obtaining the current weight of the temporary storage tank as the initial weight; S315, closing all valves in the powder feeding system.

[0088] In the above technical solution, by displacing the air in the temporary storage tank with an inert gas, the contact between the powder and water vapor or oxygen in the air can be reduced, the generation of dangerous gases can be reduced, and the risk of changes in the properties of the powder in the temporary storage tank can be lowered. At the same time, before weighing the temporary storage tank, closing the first discharge valve of the glove box and opening the first feed valve of the temporary storage tank can reduce the influence of the pulling force generated by the first connection position of the first feed pipe and the first discharge pipe on the temporary storage tank, improving the weighing accuracy of the temporary storage tank.

[0089] In some embodiments, step S33 includes: S331, confirming that the glove box has finished feeding materials into the temporary storage tank; S332, closing the first discharge valve of the glove box; S333, adjusting the air pressure in the temporary storage tank to the preset weighing pressure; S334, obtaining the current weight of the temporary storage tank as the first weight; S335, closing the first feed valve of the temporary storage tank.

[0090] In the above technical solution, the current weight of the temporary storage tank can be obtained again under the condition of the preset weighing pressure, reducing the influence of the glove box on the weighing of the temporary storage tank.

[0091] In some embodiments, step S34 includes: S341, adjusting the pressure in the sending tank to a preset weighing pressure; S342, opening the second feed valve of the sending tank; S343, opening the second discharge valve of the temporary storage tank; S344, controlling the screw feeder to feed materials into the sending tank.

[0092] In the above technical solution, adjusting the pressure of the sending tank to the preset weighing pressure can make the pressure in the sending tank consistent with the pressure in the temporary storage tank, which is beneficial to the powder in the temporary storage tank being transported into the sending tank, reducing the transportation resistance and improving the transportation stability and efficiency.

[0093] In some embodiments, step S35 includes: S351, driving the second inner lining of the temporary storage tank to vibrate, purging the temporary storage tank, and confirming that the current weight of the temporary storage tank is less than or equal to the initial weight; S352, confirming that the current weight of the temporary storage tank remains unchanged for the first period of time; S353, closing the second feed valve of the sending tank and opening the first feed valve of the temporary storage tank; S354, adjusting the air pressure in the temporary storage tank to the preset weighing pressure; S355, obtaining the current weight of the temporary storage tank as the second weight.

[0094] In the above technical solution, by vibrating and purging the temporary storage tank, the residue of the powder in the temporary storage tank can be reduced. When weighing the temporary storage tank, opening the first feed valve and the second discharge valve and closing the first discharge valve and the second feed valve can reduce the influence of the pulling force at the first connection position of the first feed pipe and the first discharge pipe and the second connection position of the second feed pipe and the second discharge pipe on the weighing of the temporary storage tank, improving the weighing accuracy of the temporary storage tank.

[0095] In some embodiments, step S36 includes: comparing the second weight with the initial weight. When the difference between the second weight and the initial weight is within the preset range, then execute S37. When the difference between the second weight and the initial weight exceeds the preset range, close the first feed valve of the temporary storage tank, open the second feed valve of the sending tank, and then re - execute step S35.

[0096] In the above technical solution, it can accurately determine whether the powder dropped into the temporary storage tank by the glove box is completely transported into the sending tank, reduce the adhesion amount of the powder in the temporary storage tank, and reduce the powder loss.

[0097] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0098] Figure 1 is a schematic structural diagram of a production system according to an embodiment of the present application;

[0099] Figure 2 is a schematic structural diagram of a powder feeding system according to an embodiment of the present application;

[0100] Figure 3 It is a schematic structural diagram of the glove box of the powder feeding system according to an embodiment of the present application;

[0101] Figure 4 is Figure 2 a schematic structural diagram of the first feed pipe, the first discharge pipe and the first sleeve shown in

[0102] Figure 5 is Figure 2 a schematic structural diagram of the second feed pipe, the second discharge pipe and the second sleeve shown in

[0103] Figure 6 It is a control flow chart of the powder feeding system according to an embodiment of the present application when shaking and cleaning the glove box;

[0104] Figure 7 It is a control flow chart of the powder feeding system according to an embodiment of the present application when purging the glove box;

[0105] Figure 8 It is a control flow chart of the batching of the powder feeding system according to an embodiment of the present application from the glove box to the temporary storage tank and then to the sending tank;

[0106] Figure 9 It is a feeding flow chart of the powder feeding system according to an embodiment of the present application.

[0107] Reference numerals:

[0108] 1000, production system;

[0109] 100, powder feeding system;

[0110] 10, glove box; 101, first storage chamber; 102, first interstitial space;

[0111] 11, box body; 12, first lining; 13, first discharge pipe; 14, first discharge valve;

[0112] 20, temporary storage tank; 201, second storage chamber; 23, first feed pipe; 24, first feed valve;

[0113] 30, screw feeder; 31, second discharge pipe; 32, second discharge valve;

[0114] 40, sending tank; 401, third storage chamber; 41, second feed pipe; 42, second feed valve;

[0115] 50, dust removal fan; 511, first air pipe; 512, first dust removal valve;

[0116] 521, second air pipe; 522, second dust removal valve; 531, third air pipe; 532, third dust removal valve;

[0117] 61. First sleeve; 611. First inflation chamber; 62. Second sleeve; 621. Second inflation chamber;

[0118] 800. Pulping system; 80. Pulping tank. Detailed implementation manners

[0119] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0120] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0121] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plural" is more than two, unless otherwise specifically defined.

[0122] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0123] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally means that the associated objects before and after are in an "or" relationship.

[0124] In the description of the embodiments of this application, the term "plural" refers to more than two (including two).

[0125] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0126] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0127] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as other fields. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0128] The electrode assembly is the component in the battery cell that specifically undergoes an electrochemical reaction. During the production process of the electrode assembly, the positive and negative electrode slurries need to be coated on the electrode foils. The raw materials of the positive and negative electrode slurries are stored in bulk bags. When it is necessary to prepare the electrode assembly, the powders stored in the bulk bags need to be transported to the pulping system, where they are remade into slurries and finally coated on the electrode foils.

[0129] At present, in the dangerous powder feeding process in the lithium battery industry, there is a problem of exposed powder during bag opening. This method is not applicable to powders with high risks such as toxic, flammable, and explosive powders. For example, when sulfide powders leak and react with water in the air to generate hydrogen sulfide, in the powder feeding process of solid-state battery powders, it is usually necessary to adopt metering and transportation in a closed space.

[0130] In the traditional powder feeding, metering, and transportation process in the lithium battery industry, usually after manual weighing, fixed-packaging feeding is carried out. This method has low efficiency and cannot achieve large-scale mass production.

[0131] Based on the above considerations, in order to achieve mass production of powder feeding, the present application designs a powder feeding system. A screw feeder is arranged between the temporary storage tank and the sending tank, and the powder in the temporary storage tank is conveyed into the sending tank through the screw feeder. It can not only automatically convey the powder in the temporary storage tank into the sending tank, but also accurately measure the weight of the powder fed into the sending tank, realizing highly automated powder batching and improving the batching efficiency. Compared with the batching method of manual weighing followed by fixed-packaging feeding, this embodiment not only has a high degree of batching automation, can quickly achieve mass production, but also can reduce the contact between personnel and powder, and reduce the harm of powder to health.

[0132] The powder feeding system and production system disclosed in the embodiments of the present application can be used to prepare powders for lithium batteries, such as active materials (such as ternary lithium, lithium iron phosphate), conductive agents (such as graphene), binders (such as CMC, SBR), etc. The powders are conveyed to a pulping system, and the prepared slurry is used to coat on foil materials (such as aluminum foil and copper foil, where aluminum foil is used for the positive electrode and copper foil is used for the negative electrode) to form electrode sheets. The electrode sheets can form electrode assemblies through stacking or winding, and then be assembled into battery monomers, electrical devices, and various energy storage systems. The electrical device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc.

[0133] The following refers to Figures 1-5 to introduce the powder feeding system 100 of the present application and the production system 1000 having the powder feeding system 100 in detail.

[0134] Figure 1 is a schematic structural diagram of the production system 1000 according to an embodiment of the present application; Figure 2 is a schematic structural diagram of the powder feeding system 100 according to an embodiment of the present application; Figure 3 is a schematic structural diagram of the glove box 10 of the powder feeding system 100 according to an embodiment of the present application; Figure 4 is Figure 2 a schematic structural diagram of the first feed pipe 23, the first discharge pipe 13, and the first sleeve 61 shown in Figure 5 is Figure 2 a schematic structural diagram of the second feed pipe 41, the second discharge pipe 31, and the second sleeve 62 shown in

[0135] The embodiments of the present application propose a powder feeding system 100, as shown in Figure 1 and Figure 2As shown in the figure, the powder feeding system 100 includes: a glove box 10, a temporary storage tank 20, a screw feeder 30, and a sending tank 40. The inlet of the temporary storage tank 20 is connected to the outlet of the glove box 10. The screw feeder 30 is connected between the outlet of the temporary storage tank 20 and the inlet of the sending tank 40. The screw feeder 30 is used to convey the powder in the temporary storage tank 20 to the sending tank 40. The outlet of the sending tank 40 is adapted to be connected to a pulping system 800. The powder feeding system 100 is configured to measure the weight of the powder conveyed by the screw feeder 30 to the sending tank 40.

[0136] The powder feeding system 100 of this embodiment can be applied to the feeding process of some hazardous powders during the battery production process, and can also be used for the feeding process of some powders in other production processes.

[0137] The glove box 10 usually has an enclosed box body 11, and an inert gas or the like can be filled inside to create a specific internal environment of the box. Gloves are provided on the glove box 10 and installed on the box body 11. Operators can operate without directly contacting the substances inside the box. It is mainly used to handle substances sensitive to air and moisture, such as materials in the fields of lithium battery R & D and production, semiconductor manufacturing, special material preparation, and biopharmaceuticals.

[0138] The temporary storage tank 20 is a container device for temporarily storing various materials, which can store raw materials or semi-finished products to be processed, playing a role in buffering, regulating the production rhythm, and ensuring the stable supply of materials.

[0139] "The outlet of the glove box 10 is connected to the inlet of the temporary storage tank 20" means that the outlet of the glove box 10 is connected and communicated with the inlet of the temporary storage tank 20, so that the powder in the glove box 10 can enter the temporary storage tank 20 in sequence through the outlet of the glove box 10 and the inlet of the temporary storage tank 20 and be temporarily stored in the temporary storage tank 20. Among them, in some examples, the outlet of the glove box 10 and the inlet of the temporary storage tank 20 can be connected and communicated through a connecting pipe, and structures such as control valves can be connected in series on the connecting pipe.

[0140] The screw feeder 30 is connected between the outlet of the temporary storage tank 20 and the inlet of the sending tank 40, which means that the inlet of the screw feeder 30 is connected to the outlet of the temporary storage tank 20, and the outlet of the screw feeder 30 is connected to the inlet of the sending tank 40. Among them, the inlet of the screw feeder 30 and the outlet of the temporary storage tank 20 can be directly connected or connected through a connecting pipe.

[0141] The outlet of the sending tank 40 can be connected to the pulping system 800 through a connecting pipeline, for supplying powder materials to the pulping system 800 to facilitate subsequent pulping processes. Among them, in some embodiments, the powder materials in the sending tank 40 can be pneumatically conveyed to the pulping system 800, and a blower can be set, which is connected to the sending tank 40 and used to blow the powder materials in the sending tank 40 into the pulping system 800.

[0142] When the screw feeder 30 is working, the screw shaft is rotated by a motor, and the screw blades push the materials from the feed inlet along the trough to the discharge outlet. Among them, during the process of the screw feeder 30 conveying powder materials, the conveying capacity is proportional to the rotational speed of the screw shaft. According to the rotational speed of the screw shaft and the equipment parameters of the screw feeder 30 (such as the size and pitch of the screw blades), etc., the conveying capacity of the screw feeder 30 can be directly calculated. It is also possible to calculate the volume of materials conveyed per unit time based on the space volume formed by the screw blades and the trough of the screw feeder 30, combined with the rotational speed of the screw shaft, and then convert it into mass according to the density of the materials, so as to measure the amount of materials conveyed. Furthermore, a weighing sensor can also be set at the discharge outlet or the conveying path of the screw feeder 30 to directly measure the weight of the materials passing through per unit time, thereby obtaining the conveying capacity of the materials.

[0143] In addition, the powder feeding system 100 measures the weight of the powder materials conveyed by the screw feeder 30 to the sending tank 40. It is also possible to set a weighing sensor for measuring the weight of the temporary storage tank 20, and by monitoring the weight change of the temporary storage tank 20, the weight of the powder materials conveyed to the sending tank 40 can be measured; it is also possible to set a weighing sensor for measuring the weight of the sending tank 40, and by monitoring the weight change of the sending tank 40, the weight of the powder materials conveyed to the sending tank 40 can be measured.

[0144] In the above technical solution, by setting a screw feeder 30 between the temporary storage tank 20 and the sending tank 40, and conveying the powder materials in the temporary storage tank 20 into the sending tank 40 through the screw feeder 30, in this way, not only can the powder materials in the temporary storage tank 20 be automatically conveyed into the sending tank 40, but also the weight of the powder materials proportioned to the sending tank 40 can be accurately measured, realizing highly automated proportioning of powder materials and improving the proportioning efficiency. Compared with the proportioning method of manual weighing first and then fixed-packaging feeding, this embodiment not only has a high degree of automation in proportioning, can quickly achieve mass production, but also can reduce the contact between personnel and powder materials, reducing the harm of powder materials to health.

[0145] In some embodiments of the present application, as Figures 2-3 shown, the glove box 10 includes: a box body 11 and a first lining 12. The first lining 12 is arranged inside the box body 11, and the inner side of the first lining 12 defines the first storage cavity 101 of the glove box 10.

[0146] The box body 11 is the main frame structure of the glove box 10, which is used to enhance the structural strength of the glove box 10 and isolate the internal space of the box body 11 from the external environment. Among them, the box body 11 can be a metal part or a plastic part.

[0147] In the above technical solution, since the first lining 12 is provided in the box body 11, the first lining 12 can further enhance the structural strength of the glove box 10. And because the first storage cavity 101 is located inside the first lining 12, in this way, the first lining 12 can isolate the powder in the first storage cavity 101 from the box body 11, reducing the direct contact between the powder and the box body 11, thereby protecting the box body 11 and reducing the probability of the box body 11 being corroded by the powder, and improving the service life of the glove box 10.

[0148] In some embodiments of the present application, the powder feeding system 100 further includes: a first vibration driving device, and the first vibration driving device is used to drive the first lining 12 to vibrate.

[0149] In some examples, the first vibration driving device can be an exciter.

[0150] When powder is stored in the first storage cavity 101 of the glove box 10, the powder will adsorb on the first lining 12. After the glove box 10 discharges the material into the temporary storage tank 20, some powder will remain on the inner wall of the first lining 12, resulting in incomplete material discharge. And when the glove box 10 needs to be opened again to put powder into the glove box 10, the remaining powder in the glove box 10 will react with the air or come into contact with the human body, affecting the health of the operators.

[0151] In this embodiment, by setting the first vibration driving device to drive the first lining 12 to vibrate, after the glove box 10 discharges the powder into the temporary storage tank 20, the first vibration driving device can drive the first lining 12 to vibrate. By vibrating the first lining 12, the adsorbed or adhered powder on the first lining 12 can be shaken off, improving the material discharge efficiency into the temporary storage tank 20, reducing the residual amount of powder in the glove box 10, and reducing the loss of powder.

[0152] In the above technical solution, due to the setting of the first vibration driving device, by driving the first lining 12 to vibrate, the adsorbed or adhered powder on the first lining 12 can be shaken off, reducing the residual amount of powder in the glove box 10 and reducing the impact on the health of the operators.

[0153] In some embodiments of the present application, such as Figure 3As shown, the first inner lining 12 is an elastic member. A first gap space 102 is formed between the box body 11 and the first inner lining 12. The first vibration driving device includes a first ventilation pipe and a first air flow driving mechanism. One end of the first ventilation pipe is connected to the first air flow driving mechanism and the other end communicates with the first gap space 102. The first air flow driving mechanism blows gas into the first gap space 102 through the first ventilation pipe and extracts the gas in the first gap space 102.

[0154] The first inner lining 12 is an elastic member. Under the action of an external force, the first inner lining 12 can undergo elastic deformation. For example, the first inner lining 12 can be a rubber member.

[0155] A first gap space 102 is formed between the box body 11 and the first inner lining 12. That is to say, the circumferences of the box body 11 and the first inner lining 12 are connected, and a first gap space 102 that is not connected to the first storage cavity 101 is enclosed between the box body 11 and the first inner lining 12. The first air flow driving mechanism can ventilate the first gap space 102 through the first ventilation pipe and can also inhale air from the first gap space 102 to change the pressure in the first gap space 102.

[0156] Due to the change in the pressure difference on both sides of the first inner lining 12, the first inner lining 12 can undergo elastic deformation under the action of the pressure difference. When the pressure in the first gap space 102 changes repeatedly, the first inner lining 12 can deform and recover repeatedly. At this time, the first inner lining 12 vibrates under the drive of the repeatedly changing pressure difference. Thus, the powder on the inner wall surface of the first inner lining 12 can be shaken off, further reducing the adhesion amount of the powder on the first inner lining 12, reducing the residual amount of powder in the glove box 10, and reducing the impact on the health of the operating personnel.

[0157] In some examples, the first air flow driving mechanism can be a blower. A control valve can be connected in series on the first ventilation pipe to control the on / off of the first ventilation pipe and to adjust the gas flow rate in the first ventilation pipe.

[0158] In the above technical solution, since the first inner lining 12 is an elastic member and cooperates with the box body 11 to define the first gap space 102, the first air flow driving structure is used to extract or pump gas into the first gap space 102 to change the pressure in the first gap space 102, so that the first inner lining 12 can vibrate under the action of the changing pressure, further shaking off the powder on the first inner lining 12, and realizing further reducing the impact of the residual powder in the glove box 10 on the health of the operating personnel.

[0159] In some embodiments of the present application, refer to Figure 3A first air inlet and a first air outlet are formed on the box body 11, which are arranged at intervals and communicated with the first gap space 102. The first airflow driving mechanism includes: a first fan and a first vacuum pump. The outlet of the first fan is connected to the first air inlet, and the inlet of the first vacuum pump is connected to the first air outlet.

[0160] The first fan can be connected to the first air inlet via a first conduit, and a first air inlet valve can be connected in series to the first conduit to control the amount and flow rate of air entering the first interstitial space 102 from the first air inlet. When the first fan is in operation, the first fan can deliver air into the first interstitial space 102 through the first conduit and the first air inlet. At this time, the pressure in the first interstitial space 102 gradually increases, and under the influence of this pressure, the first liner 12 undergoes elastic deformation, bulging toward the inside of the first storage chamber 101.

[0161] The first vacuum pump can be connected to the first gas outlet via a second pipe, and a first vacuum valve can be connected in series to the second pipe to control the volume and flow rate of gas flowing out of the first interstitial space 102 from the first gas outlet. When the first vacuum pump is operating, the first vacuum pump can extract gas from the first interstitial space 102 via the first gas outlet and the second pipe. At this time, the pressure in the first interstitial space 102 gradually decreases. Driven by this pressure, the first liner 12 undergoes elastic deformation, convexing away from the first storage chamber 101 toward the box body 11.

[0162] In the above technical solution, since the first fan and the first vacuum pump connected to the first gap space 102 are respectively provided, it is convenient to input and extract gas into and out of the first gap space 102. The structure is simple and the control is convenient. The first lining 12 can be shaken conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the first lining 12.

[0163] In some embodiments of the present application, the first blower and the first vacuum pump are configured to operate alternately to shake the first liner 12 .

[0164] For example, when powder on the first liner 12 needs to be shaken off, the first blower can be controlled to operate for a first preset time to maintain the pressure of the incoming gas at the first preset pressure, and then the first vacuum pump can be controlled to operate for a second preset time to maintain the pressure of the vacuum pump at the second preset pressure. This process is repeated for a predetermined period of time. The first preset time and the second preset time can be the same or different.

[0165] In the above technical solution, since the first fan and the first vacuum pump are configured to operate alternately, the first liner 12 can be shaken conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the first liner 12 .

[0166] In some embodiments of the present application, reference is made to Figure 3, the first inner lining 12 is a non-metallic part.

[0167] In the above technical solution, since the first inner lining 12 is a non-metallic part, the probability of the first inner lining 12 generating static electricity to adsorb powder can be reduced, and the risk of the first inner lining 12 generating metal particles due to friction with the powder and the metal particles entering the powder can also be reduced. When the powder feeding system 100 is used in the production system 1000 for producing batteries, the battery performance can be ensured.

[0168] In some embodiments of the present application, the first inner lining 12 is a fluororubber part.

[0169] The battery solid powder may contain various chemical substances such as lithium salts, etc. Fluororubber has extremely strong corrosion resistance and can resist the erosion of these chemical substances, reducing the damage of the first inner lining 12, thereby ensuring the normal use of the glove box 10 and the purity of the powder.

[0170] Fluororubber has good elasticity and flexibility, which can effectively reduce the leakage probability of the protective gas in the glove box 10 and maintain the stability of the gas environment in the box body 11. And the surface of fluororubber is smooth and not easy to adhere to the battery solid powder, which is more convenient to clean, and can effectively reduce the pollution caused by powder residue to the first inner lining 12.

[0171] In the above technical solution, by setting the first inner lining 12 as a fluororubber part, the corrosion resistance and sealing performance of the first inner lining 12 can be improved, the probability of powder adhering to the first inner lining 12 can be reduced, and the service life of the first inner lining 12 can be extended.

[0172] In some embodiments of the present application, the powder feeding system 100 further includes: a first purging device, and the first purging device includes: a first air pipe 511 and a first dust removal valve 512 connected in series on the first air pipe 511. One end of the first air pipe 511 extends into the first storage cavity 101 of the glove box 10 for purging the powder on the inner wall of the first storage cavity 101.

[0173] After the glove box 10 drops materials into the temporary storage tank 20, the powder remaining on the inner wall of the glove box 10 can be purged through the first purging device, for example, by introducing gas with a set pressure into the glove box 10 through the first air pipe 511 and the first dust removal valve 512. In addition, by controlling the first dust removal valve 512, the on / off and flow rate of the purging gas can be flexibly controlled, and precise purging can be carried out according to actual needs, improving the controllability and adaptability of the purging operation to meet the cleaning requirements under different working conditions.

[0174] In this embodiment, by providing the first purging device, the powder adhered to the inner wall of the first storage cavity 101 can be effectively purged, reducing the risk that the long-term accumulation of powder affects the effective space of the first storage cavity 101, and also reducing the risk that the long-term adhesion of powder causes corrosion and wear to the inner wall of the glove box 10, extending the service life of the glove box 10. Moreover, the powder adhered to the inner wall of the glove box 10 can re-participate in the subsequent stock preparation process, reducing the waste of powder. In addition, it can also reduce the difficulty and frequency of manually cleaning the glove box 10, reduce the direct contact between the operator and the powder, reduce the labor intensity, and also reduce the health risks that may be brought by manual cleaning.

[0175] In some examples, the first purging device may further include a first dust removal fan, and the outlet of the first dust removal fan is connected to the glove box 10 through a first air pipe 511. When actively purging the glove box 10, the first dust removal fan can be started and the first dust removal valve 512 can be opened, so that the outlet of the first dust removal fan is connected to the first storage cavity 101 of the glove box 10. When the purging is completed, the first dust removal fan can be turned off and the first dust removal valve 512 can be closed. In addition, it should be noted that when the first dust removal valve 512 is opened and the first dust removal fan is closed, the first storage cavity 101 can be connected to the external environment or the gas source through the first air pipe 511, the outlet and the inlet of the first dust removal fan. At this time, under the action of the pressure difference, the gas in the external environment or the gas source can also enter the first storage cavity 101 through the first air pipe 511 to change the pressure in the first storage cavity 101.

[0176] In some examples, when the first purging device purges the glove box 10, the purging gas is dry compressed air or compressed nitrogen.

[0177] In some examples, one end of the first air pipe 511 extending into the glove box 10 is provided with a spraying structure. For example, the spraying structure can be a spraying cavity or a nozzle, etc. Further, the blowing direction of the spraying structure in the glove box 10 is adjustable. Thus, the purging range of the inner wall of the glove box 10 can be further increased, and the purging efficiency of the first purging device and the dust removal effect on the glove box can be improved.

[0178] In the above technical solution, since the first purging device is provided for purging the powder on the inner wall of the first storage cavity 101, the probability of powder adhesion in the glove box 10 can be reduced, the service life of the glove box 10 can be extended, the waste of powder can be reduced, and the risk of contact between the powder and the operator can be reduced.

[0179] In some embodiments of the present application, the first dust removal valve 512 is arranged outside the glove box 10.

[0180] That is to say, the first dust removal valve 512 is connected in series to a partial pipe section of the first air pipe 511 arranged outside the glove box 10. In this way, when it is necessary to control the first dust removal valve 512, the operator does not need to open the glove box 10, nor operate the components inside the glove operation box body 11 through gloves, and can directly operate the first dust removal valve 512 outside the glove box 10 to control the start and stop of the first purging device, and adjust the gas flow rate, etc., greatly improving the operation convenience and saving operation time.

[0181] Meanwhile, since the first dust removal valve 512 is arranged outside the glove box 10, it is convenient to inspect and maintain the first dust removal valve 512, without entering the complex environment inside the glove box 10, reducing the maintenance difficulty and cost. Also, the first dust removal valve 512 does not occupy the internal space of the glove box 10, enabling the internal space of the glove box 10 to be more reasonably used for storing and processing powder materials, improving the space utilization rate.

[0182] In the above technical solution, since the first dust removal valve 512 is arranged outside the glove box 10, the first dust removal valve 512 can be directly operated outside the glove box 10 to control the start and stop of the first purging device, improving the operation convenience, facilitating the inspection and maintenance of the first dust removal valve 512, and also enabling the first dust removal valve 512 not to occupy the space inside the glove box 10, improving the space utilization rate of the glove box 10.

[0183] In some embodiments of the present application, the first dust removal valve 512 is formed as a foot valve. A foot valve is a valve that controls the opening and closing state through a foot pedal.

[0184] In the above technical solution, by setting the first dust removal valve 512 as a foot valve, the foot valve will only act when actively stepped on, which can not only reduce the probability of accidental touch and the risk of misoperation, but also reduce hand fatigue and is suitable for long-term operation. Additionally, by adjusting the stepping force and stroke, the gas flow rate and on-off can be flexibly adjusted to keep the powder feeding system 100 operating well.

[0185] In a specific example, the first dust removal fan is connected to the glove box 10 through the first air pipe 511. A pressure regulating valve and an explosion-proof solenoid valve are connected in series along the air flow direction on the first air pipe 511. One end of the first air pipe 511 extending into the glove box 10 is connected to a spray gun. The volume of the glove box 10 is 425L, the inner diameter of the first air pipe 511 is 4mm, and the cross-sectional area of the pipeline of the first air pipe 511 is 0.000012566m 2 , when purging the glove box 10, the input air flow pressure is 200 kPa, and the air flow density is 2.3 kg / m 3, the air flow velocity is 13.18760947 m / s, the duration is 10 s, the volume of the gas introduced into the glove box 10 is 1.657155006 L, and the pressure inside the glove box 10 is 0.77983765 kPa.

[0186] In some embodiments of the present application, the powder feeding system 100 further includes: a first detection device, which is used to detect the air pressure in the first storage cavity 101, and the first detection device is communicatively connected to the first purging device.

[0187] The first detection device can monitor the change of the air pressure in the first storage cavity 101 in real time. Since the glove box 10 includes gloves extending into the first storage cavity 101, in order to make the glove box 10 work properly, the pressure in the first storage cavity 101 should be balanced with the external environmental pressure or less than the external environmental pressure.

[0188] When the first purging device purges the first storage cavity 101, a gas with a certain pressure needs to be continuously introduced into the first storage cavity 101. During the purging process, the pressure in the first storage cavity 101 increases. Since the first detection device is communicatively connected to the first purging device, when it is detected that the pressure in the first storage cavity 101 is equal to or greater than the external environmental pressure, the first purging device can be controlled to stop purging, so as to control the pressure in the first storage cavity 101 within a preset value range and reduce the risk that the glove is pressed out of the outside of the box body 11 under the action of the air pressure.

[0189] At the same time, since the pressure value detected by the first detection device can be fed back to the first purging device in real time, the purging operation can be automatically adjusted according to the air pressure in the first storage cavity 101, without manual frequent inspection and manual opening of the purging, reducing manual intervention and improving the automation degree of the production process, thereby improving the overall production efficiency.

[0190] In some examples, the first detection device can be a pressure sensor.

[0191] In the above technical solution, by setting the first detection device for detecting the air pressure in the first storage cavity 101, not only can the pressure inside the glove box 10 be monitored in real time to keep the pressure inside the glove box 10 within a suitable range, but also the purging operation of the first purging device can be automatically adjusted according to the air pressure in the first storage cavity 101, reducing manual intervention, reducing the probability of misoperation, and improving the overall production efficiency.

[0192] In some embodiments of the present application, the temporary storage tank 20 includes a tank body and a second inner lining. The second inner lining is arranged inside the tank body, and the inner side of the second inner lining defines the second storage cavity 201 of the temporary storage tank 20.

[0193] The tank body is the main frame structure of the temporary storage tank 20, which is used to enhance the structural strength of the temporary storage tank 20 and isolate the internal space of the temporary storage tank 20 from the external environment. Among them, the tank body can be a metal part or a plastic part.

[0194] In the above technical solution, by dividing the temporary storage tank 20 into an inner and outer arranged tank body and a second inner lining, the second inner lining can enhance the structural strength of the temporary storage tank 20. Since the second storage cavity 201 is formed inside the second inner lining, in this way, the second inner lining can isolate the powder in the second storage cavity 201 from the tank body, reducing the direct contact between the powder and the tank body, thereby protecting the tank body and reducing the probability of the tank body being corroded by the powder, and enhancing the service life of the temporary storage tank 20.

[0195] In some embodiments of the present application, the powder feeding system 100 further includes: a second vibration driving device, and the second vibration driving device is used to drive the second inner lining to vibrate.

[0196] In some examples, the second vibration driving device can be an exciter. When powder is stored in the second storage cavity 201 of the temporary storage tank 20, some powder may be adsorbed on the second inner lining. After the temporary storage tank 20 feeds the powder into the sending tank 40, some powder will remain on the inner wall of the second inner lining, resulting in incomplete feeding. On the one hand, the powder not only occupies space in the temporary storage tank 20 but also poses a risk of corroding the temporary storage tank 20. On the other hand, it also causes waste of powder and increases production costs.

[0197] In this embodiment, by setting the second vibration driving device to drive the second inner lining to vibrate, after the temporary storage tank 20 conveys the powder into the sending tank 40, the second vibration driving device can drive the second inner lining to vibrate. By vibrating the second inner lining, the adsorbed or adhered powder on the second inner lining can be shaken off, improving the feeding efficiency into the sending tank 40, reducing the residual amount of powder in the temporary storage tank 20, and reducing the loss of powder.

[0198] In the above technical solution, due to the setting of the second vibration driving device, by driving the second inner lining to vibrate, the adsorbed or adhered powder on the second inner lining can be shaken off, reducing the residual amount of powder in the temporary storage tank 20 and reducing the loss of powder.

[0199] It should be noted that the structure of the second vibration driving device in this embodiment and the first vibration driving device can be the same or different.

[0200] In some embodiments of the present application, the second inner lining is an elastic member, a second gap space is formed between the tank body and the second inner lining, the second vibration driving device includes a second ventilation pipe and a second air flow driving mechanism, one end of the second ventilation pipe is connected to the second air flow driving mechanism and the other end is communicated to the second gap space, and the second air flow driving mechanism blows gas into the second gap space and extracts the gas in the second gap space through the second ventilation pipe.

[0201] The second inner lining is an elastic member, and under the action of an external force, the second inner lining can undergo elastic deformation. For example, the second inner lining can be a rubber member. A second gap space is formed between the tank body and the second inner lining. That is to say, the circumferences of the tank body and the second inner lining are connected, and a second gap space that is not connected to the second storage cavity 201 is enclosed between the tank body and the second inner lining. The second air flow driving mechanism can ventilate the second gap space through the second ventilation pipe or inhale air from the second gap space to change the pressure in the second gap space.

[0202] Due to the change in the pressure difference on both sides of the second inner lining, the second inner lining can undergo elastic deformation under the action of the pressure difference. When the pressure in the second gap space changes repeatedly, the second inner lining can deform and recover repeatedly. At this time, the second inner lining vibrates under the drive of the repeatedly changing pressure difference. Thus, the powder on the inner wall surface of the second inner lining can be shaken off, further reducing the adhesion amount of the powder on the second inner lining and reducing the residual amount of the powder in the temporary storage tank 20.

[0203] In some examples, the second air flow driving mechanism can be a fan. A control valve can be connected in series on the second ventilation pipe to control the on / off of the second ventilation pipe and regulate the gas flow rate in the second ventilation pipe.

[0204] In the above technical solution, since the second inner lining is an elastic member and cooperates with the tank body to define the second gap space, the second air flow driving structure is used to extract or pump gas into the second gap space to change the pressure in the second gap space, so that the second inner lining can vibrate under the action of the changing pressure, and further shake off the powder on the second inner lining, realizing further reduction of the residual powder in the temporary storage tank 20.

[0205] In some embodiments of the present application, a second air inlet and a second air outlet are formed on the tank body at intervals and are connected to the second gap space. The second air flow driving mechanism includes: a second fan and a second vacuum pump. The outlet of the second fan is connected to the second air inlet, and the inlet of the second vacuum pump is connected to the second air outlet.

[0206] The second fan can be connected to the second air inlet through a third pipeline, and a second air inlet valve can be connected in series on the third pipeline to control the gas volume and flow rate entering the second gap space from the second air inlet. When the second fan is running, the second fan can send gas into the second gap space through the third pipeline and the second air inlet. At this time, the pressure in the second gap space gradually increases, and under the push of the pressure, the second inner lining undergoes elastic deformation protruding towards the second storage cavity 201.

[0207] The second vacuum pump can be connected to the second air outlet through the fourth pipeline, and a second vacuum valve can be connected in series on the fourth pipeline to control the gas volume and flow rate flowing out of the second gap space from the second air outlet. When the second vacuum pump is operating, the second vacuum pump can extract the gas in the second gap space through the second air outlet and the fourth pipeline. At this time, the pressure in the second gap space gradually decreases, and under the push of the pressure, the second inner lining undergoes elastic deformation that bulges away from the second material storage cavity 201 towards the tank body.

[0208] In the above technical solution, since the second fan and the second vacuum pump respectively connected to the second gap space are provided, it is convenient to input and extract gas from the second gap space. The structure is simple and the control is convenient, which can conveniently and efficiently realize the jitter of the second inner lining and improve the shaking efficiency of the powder on the second inner lining.

[0209] In some embodiments of the present application, the second fan and the second vacuum pump are configured to operate alternately to make the second inner lining jitter. For example, when it is necessary to shake off the powder on the second inner lining, the second fan can be controlled to operate for a third set time, keeping the pressure of the introduced gas at a third set pressure, and then the second vacuum pump can be controlled to operate for a fourth set time, keeping the pressure of the vacuum pump at a fourth set pressure, and so on, and continue for a certain period of time. Among them, the third set time and the fourth set time can be the same or different.

[0210] In some examples, the third set time can be 2s - 10s. For example, the third set time can be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The third set pressure can be 3kPa - 15kPa. For example, the third set pressure can be 3kPa, 4kPa, 5kPa, 6kPa, 7kPa, 8kPa, 9kPa, 10kPa, 11kPa, 12kPa, 13kPa or 14kPa, etc.

[0211] In some examples, the fourth set time can be 2s - 10s. For example, the fourth set time can be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The fourth set pressure can be -3kPa to -15kPa. For example, the fourth set pressure can be -3kPa, -4kPa, -5kPa, -6kPa, -7kPa, -8kPa, -9kPa, -10kPa, -11kPa, -12kPa, -13kPa or -14kPa, etc.

[0212] In the above technical solution, since the second fan and the second vacuum pump are configured to operate alternately, it is convenient and efficient to realize the jitter of the second inner lining and improve the shaking efficiency of the powder on the second inner lining.

[0213] In some embodiments of the present application, refer toFigure 3 The second inner lining is a non-metallic part. Thus, the probability of the second inner lining generating static electricity to adsorb powder can be reduced, and the risk of metal particles entering the powder due to the friction between the second inner lining and the powder can also be reduced. When the powder feeding system 100 is used in the production system 1000 for producing batteries, the battery performance can be ensured.

[0214] In some embodiments of the present application, the second inner lining is a fluororubber part. Thus, the corrosion resistance and sealing performance of the second inner lining can be improved, the probability of powder adhering to the second inner lining can be reduced, and the service life of the second inner lining can be extended.

[0215] In some embodiments of the present application, the powder feeding system 100 further includes: a second purging device, the second purging device includes: a second air pipe 521 and a second dust removal valve 522 connected in series on the second air pipe 521. The second air pipe 521 is connected to the second storage chamber 201 of the temporary storage tank 20, and is used to convey gas to the second storage chamber 201 to purge the powder on the inner wall of the second storage chamber 201.

[0216] After the temporary storage tank 20 feeds materials into the sending tank 40, the powder remaining on the inner wall of the temporary storage tank 20 and inside the screw feeder 30 can be purged through the second purging device. For example, gas with a set pressure is introduced into the temporary storage tank 20 through the second air pipe 521 and the second dust removal valve 522. In addition, by controlling the second dust removal valve 522, the on / off and flow rate of the purging gas can be flexibly controlled, and precise purging can be performed according to actual needs, improving the controllability and adaptability of the purging operation to meet the cleaning requirements under different working conditions.

[0217] In this embodiment, by setting the second purging device, the powder adhering to the inner wall of the second storage chamber 201 can be effectively purged, reducing the risk that the long-term accumulation of powder on the inner wall affects the effective space of the second storage chamber 201, and also reducing the risk that the long-term adhesion of powder causes corrosion and wear to the inner wall of the temporary storage tank 20, extending the service life of the temporary storage tank 20. It can also make the powder adhering to the inner wall of the temporary storage tank 20 re-participate in the subsequent batching process, reducing the waste of powder. In addition, it can also reduce the difficulty and frequency of manually cleaning the temporary storage tank 20, reduce the direct contact between the operator and the powder, reduce the labor intensity, and at the same time reduce the health risks that may be brought by manual cleaning.

[0218] In some examples, the second purging device may further include a second dust removal fan. The outlet of the second dust removal fan is connected to the buffer tank 20 through a second air pipe 521. When actively purging the buffer tank 20, the second dust removal fan can be started and the second dust removal valve 522 can be opened, so that the outlet of the second dust removal fan is connected to the second storage cavity 201 of the buffer tank 20. When the purging is completed, the second dust removal fan can be turned off and the second dust removal valve 522 can be closed. In addition, it should be noted that when the second dust removal valve 522 is opened and the second dust removal fan is turned off, the second storage cavity 201 can be connected to the external environment or the air source through the second air pipe 521, the outlet and the inlet of the second dust removal fan. At this time, under the action of the pressure difference, the gas in the external environment or the air source can also enter the second storage cavity 201 through the second air pipe 521 to change the pressure in the second storage cavity 201.

[0219] In some examples, when the second purging device purges the buffer tank 20, the purging gas is dry compressed air or compressed nitrogen.

[0220] In some examples, one end of the second air pipe 521 extending into the buffer tank 20 is provided with a jet structure. For example, the jet structure can be a jet cavity or a nozzle, etc. Further, the blowing direction of the jet structure in the buffer tank 20 is adjustable. Thus, the purging range of the inner wall of the buffer tank 20 can be further increased, and the purging efficiency of the second purging device and the dust removal effect on the buffer tank 20 can be improved.

[0221] In some examples, the first dust removal fan and the second dust removal fan can be two independent fans, or the first dust removal fan and the second dust removal fan can be the same fan. At this time, the inlet ends of the first air pipe 511 and the second air pipe 521 are both connected to the outlet of the dust removal fan 50.

[0222] In the above technical solution, by providing the second purging device for purging the powder on the inner wall of the second storage cavity 201, the probability of the powder adhering in the buffer tank 20 can be reduced, the service life of the buffer tank 20 can be extended, the waste of the powder can be reduced, and the risk of the powder contacting the operators can be reduced.

[0223] In some embodiments of the present application, the powder feeding system 100 further includes: a second detection device for detecting the air pressure in the second storage cavity 201, and the second detection device is communicatively connected to the second purging device.

[0224] The second detection device can monitor the change of the air pressure in the second storage cavity 201 in real time. In this way, the pressure value detected by the second detection device can be fed back to the second purging device in real time. Thus, the purging operation can be automatically adjusted according to the air pressure in the second storage cavity 201, without manual frequent inspection and manual opening of the purging, reducing manual intervention, improving the automation degree of the production process, and further improving the overall production efficiency.

[0225] In some examples, the second detection device may be a pressure sensor.

[0226] In the above technical solution, by providing the second detection device for detecting the air pressure in the second storage chamber 201, not only can the pressure in the buffer tank 20 be monitored in real time to keep the pressure in the buffer tank 20 within a suitable range, but also the purging operation of the second purging device can be automatically adjusted according to the air pressure in the second storage chamber 201, reducing manual intervention and improving the overall production efficiency.

[0227] In some embodiments of the present application, the powder feeding system 100 further includes: a third purging device, the third purging device includes: a third air pipe 531 and a third dust removal valve 532 connected in series on the third air pipe 531, the third air pipe 531 is connected to the third storage chamber 401 of the sending tank 40 for conveying gas to the third storage chamber 401 to purge the powder on the inner wall of the third storage chamber 401.

[0228] After the sending tank 40 feeds materials to the pulping system 800, the powder remaining on the inner wall of the sending tank 40 can be purged through the third purging device, for example, by introducing gas at a set pressure into the sending tank 40 through the third air pipe 531 and the third dust removal valve 532. In addition, by controlling the third dust removal valve 532, the on / off and flow rate of the purging gas can be flexibly controlled, and precise purging can be performed according to actual needs, improving the controllability and adaptability of the purging operation to meet the cleaning requirements under different working conditions.

[0229] In this embodiment, by providing the third purging device, the powder adhering to the inner wall of the third storage chamber 401 can be effectively purged, reducing the risk that the long-term accumulation of powder on the inner wall affects the effective space of the third storage chamber 401, and also reducing the risk of corrosion and wear of the inner wall of the sending tank 40 caused by the long-term adhesion of powder, prolonging the service life of the sending tank 40. It can also enable the powder adhering to the inner wall of the sending tank 40 to re-participate in the subsequent feeding process, reducing powder waste. In addition, it can also reduce the difficulty and frequency of manually cleaning the sending tank 40, reducing the direct contact between the operator and the powder, reducing the labor intensity, and also reducing the health risks that may be brought by manual cleaning.

[0230] In some examples, the third purging device may further include a third dust removal fan. The outlet of the third dust removal fan is connected to the sending tank 40 through a third air pipe 531. When actively purging the sending tank 40, the third dust removal fan can be started and the third dust removal valve 532 can be opened, so that the outlet of the third dust removal fan is communicated with the third storage chamber 401 of the sending tank 40. When the purging is over, the third dust removal fan can be turned off and the third dust removal valve 532 can be closed. In addition, it should be noted that when the third dust removal valve 532 is opened and the third dust removal fan is closed, the third storage chamber 401 can be connected to the external environment or the air source through the third air pipe 531, the outlet and the inlet of the third dust removal fan. At this time, under the action of the pressure difference, the gas in the external environment or the air source can also enter the third storage chamber 401 through the third air pipe 531 to change the pressure in the third storage chamber 401.

[0231] In some examples, when the third purging device purges the sending tank 40, the purging gas can be dry compressed air or compressed nitrogen.

[0232] In some examples, one end of the third air pipe 531 extending into the sending tank 40 is provided with a spraying structure. For example, the spraying structure can be a spraying chamber or a nozzle, etc. Further, the blowing direction of the spraying structure in the sending tank 40 is adjustable. Thus, the purging range of the inner wall of the sending tank 40 can be further increased, and the purging efficiency of the third purging device and the dust removal effect on the sending tank 40 can be improved.

[0233] In some examples, the third dust removal fan can be a fan independent of the first dust removal fan and the second dust removal fan. The third dust removal fan can also be the same dust removal fan 50 as the first dust removal fan and / or the second dust removal fan. At this time, the inlet ends of the third air pipe 531, the second air pipe 521 and / or the first air pipe 511 are all connected to the outlet of the dust removal fan 50. [[ID=ll]]

[0234] In addition, in some examples, the powder in the sending tank 40 can be transported to the pulping system 800 by means of positive pressure transportation. Specifically, when it is necessary to transport the powder to the pulping system 800, compressed nitrogen can be transported into the sending tank 40 through the third dust removal fan. After the compressed nitrogen is mixed with the powder, it is transported to the pulping system 800 through the pipeline connected to the pulping system 800.

[0235] In the above technical solution, by providing the third purging device for purging the powder on the inner wall of the third storage chamber 401, the probability of the powder adhering in the sending tank 40 can be reduced, the service life of the sending tank 40 can be extended, the waste of the powder can be reduced, the risk of the powder contacting the operators can be reduced, and the third purging device can also be used as an energy source to transport the powder in the sending tank 40 to the pulping system 800, thereby improving the transportation efficiency.

[0236] In some embodiments of the present application, the powder feeding system 100 further includes: a third detection device for detecting the air pressure in the third storage chamber 401, and the third detection device is communicatively connected to the third purging device.

[0237] The third detection device can monitor the air pressure change in the third storage chamber 401 in real time. In this way, the pressure value detected by the third detection device can be fed back to the third purging device in real time, so that the purging operation can be automatically adjusted according to the air pressure in the third storage chamber 401, without the need for manual frequent inspection and manual activation of purging, reducing manual intervention, improving the automation degree of the production process, and thus enhancing the overall production efficiency.

[0238] In some examples, the third detection device can be a pressure sensor.

[0239] In the above technical solution, by setting the third detection device for detecting the air pressure in the third storage chamber 401, not only can the pressure in the sending tank 40 be monitored in real time to keep the pressure in the sending tank 40 within a suitable range, but also the purging operation of the third purging device can be automatically adjusted according to the air pressure in the third storage chamber 401, reducing manual intervention and enhancing the overall production efficiency.

[0240] In some embodiments of the present application, the powder feeding system 100 further includes: a third vibration driving device connected to the sending tank 40 for driving the sending tank 40 to vibrate.

[0241] In some examples, the third vibration driving device can be a vibrator. When the third storage chamber 401 of the sending tank 40 stores powder, some powder may adhere to the inner wall of the sending tank 40. After the sending tank 40 feeds the powder into the pulping system 800, some powder will remain on the inner wall of the sending tank 40, resulting in incomplete feeding. On the one hand, the powder in the sending tank 40 not only occupies space but also poses a risk of corroding the sending tank 40. On the other hand, it also causes waste of powder and increases production costs.

[0242] In addition, when the powder in the sending tank 40 is transported to the pulping system 800 by means of positive pressure conveying, when transportation is required, the third vibration driving device can be started to drive the sending tank 40 to vibrate, so that the powder vibrates in the sending tank 40. In this way, when compressed gas is introduced, the compressed gas can be pre-mixed with the powder to improve the transportation efficiency of the powder.

[0243] In this embodiment, by setting the third vibration driving device for driving the sending tank 40 to vibrate, after the sending tank 40 transports the powder into the pulping system 800, the third vibration driving device can drive the sending tank 40 to vibrate, shake off the powder adsorbed or adhered to the inner wall of the sending tank 40, reduce the residual amount of powder in the sending tank 40, and reduce the loss of powder.

[0244] In some embodiments of the present application, the powder feeding system 100 further includes: a first weighing device, which is used to detect the weight of the temporary storage tank 20.

[0245] In some examples, the first weighing device may be a weighing sensor. Among them, the weighing sensor may be a resistance strain type weighing sensor, a capacitive weighing sensor, a hydraulic weighing sensor or a pneumatic weighing sensor.

[0246] In this embodiment, by setting the first weighing device, the weight change of the material in the temporary storage tank 20 can be measured in real time and accurately. It can not only accurately measure the weight of the powder fed into the temporary storage tank 20 by the glove box 10, but also accurately and real-time measure the weight of the powder transported from the temporary storage tank 20 to the sending tank 40. In this way, during the production process, by monitoring the weight data of the temporary storage tank 20, the powder addition amount added to the pulping system 800 and the remaining amount of powder in the temporary storage tank 20 can be accurately controlled, providing a stable and accurate powder supply for the pulping process, and ensuring the consistency of production and product quality.

[0247] At the same time, when the powder feeding system 100 is applied to the production system 1000, the production system 1000 can also realize automatic material distribution control according to the weight information fed back by the first weighing device, improve the automation degree of the production process, reduce manual intervention, and improve production efficiency.

[0248] In addition, by setting the first weighing device, the weight of the material in the temporary storage tank 20 can also be accurately grasped, which can avoid material overflow and waste caused by overfeeding, and at the same time reduce the occurrence of accidents that affect the production progress due to insufficient materials, and improve resource utilization rate.

[0249] In the above technical solution, by setting the first weighing device for detecting the weight of the temporary storage tank 20, not only can the weight change of the material in the temporary storage tank 20 be measured in real time and accurately, realizing a stable and accurate powder supply to the downstream process, improving the consistency of production and product quality, but also the automation degree of the production process can be improved, reducing manual intervention and improving production efficiency.

[0250] In some embodiments of the present application, the powder feeding system 100 further includes: a second weighing device, which is used to detect the weight of the glove box 10. In some examples, the second weighing device may be a weighing sensor. In this embodiment, by setting the second weighing device, the weight change of the material in the glove box 10 can be measured in real time and accurately, and the weight of the powder fed into the temporary storage tank 20 by the glove box 10 can be accurately measured. The second weighing device can also accurately grasp the weight of the material in the glove box 10, which can avoid material overflow and waste caused by overfeeding, and at the same time reduce the occurrence of accidents that affect the production progress due to insufficient materials, and improve resource utilization rate.

[0251] In some embodiments of the present application, the powder feeding system 100 further includes: a third weighing device for detecting the weight of the sending tank 40. In some examples, the third weighing device can be a load cell. By providing the third weighing device in this embodiment, the weight change of the material in the sending tank 40 can be measured in real time and accurately, the weight of the powder fed from the temporary storage tank 20 into the sending tank 40, and the weight of the powder transported from the sending tank 40 to the pulping system 800 can be accurately measured. The third weighing device can also accurately grasp the weight of the material in the sending tank 40, avoid material overflow and waste caused by overfeeding, and reduce the occurrence of accidents that affect the production progress due to insufficient materials, thereby improving resource utilization.

[0252] In some embodiments of the present application, as Figure 2 and Figure 4 shown, a first discharge pipe 13 is provided at the bottom of the glove box 10, a first discharge valve 14 is connected in series on the first discharge pipe 13, a first feed pipe 23 connected to the first discharge pipe 13 is provided at the top of the temporary storage tank 20, and a first feed valve 24 is connected in series on the first feed pipe 23. The powder feeding system 100 is configured to: be suitable for allowing the powder in the glove box 10 to fall into the temporary storage tank 20 under the action of gravity.

[0253] That is to say, when the first discharge valve 14 and the first feed valve 24 are opened, the first storage chamber 101 and the second storage chamber 201 are connected through the first discharge pipe 13 and the first feed pipe 23, and the powder can directly fall from the glove box 10 into the second storage chamber 201 of the temporary storage tank 20 under the action of gravity.

[0254] In this embodiment, the timing and speed of the powder falling from the glove box 10 into the temporary storage tank 20 can be flexibly controlled through the first discharge valve 14 and the first feed valve 24, so that the powder can fall regularly and quantitatively, meeting the process requirements of powder feeding. At the same time, by connecting the first discharge valve 14 in series on the first discharge pipe 13 and the first feed valve 24 in series on the first feed pipe 23, the sealing performance of the glove box 10 and the temporary storage tank 20 can be improved, and the probability of external air and impurities entering the glove box 10 and the temporary storage tank 20 can be reduced, ensuring the quality of the powder.

[0255] In the above technical solution, by using gravity to directly let the powder in the glove box 10 fall into the temporary storage tank 20 without additional power equipment to drive the transmission, the equipment cost can be reduced, energy consumption can be reduced, the powder transmission process can be simplified, and the transmission efficiency can be improved, enabling the powder to be quickly and smoothly transferred from the glove box 10 to the temporary storage tank 20. By setting the first feed valve 24 and the first discharge valve 14, the powder can fall into the temporary storage tank 20 according to a predetermined time, predetermined material quantity, and predetermined speed according to process requirements, improving the automation degree of the production process and meeting the process requirements of feeding.

[0256] In some embodiments of the present application, as Figure 4 shown, the first feed pipe 23 and the first discharge pipe 13 are slidable relative to each other in the vertical direction and are connected by insertion.

[0257] It should be noted that in actual production, the glove box 10 and the temporary storage tank 20 may have their relative positions changed due to fine-tuning of the installation positions, equipment vibration settlement, etc. In this embodiment, by adopting a slidable and inserted connection mode for the first feed pipe 23 and the first discharge pipe 13, this position change can be automatically adapted, ensuring the continuity of powder material transportation, reducing pipeline damage or connection loosening caused by position deviation, and ensuring the smooth progress of production.

[0258] In addition, it should be noted that when the temporary storage tank 20 and / or the glove box 10 are provided with weighing sensors for detecting weight, if the first feed pipe 23 and the first discharge pipe 13 are relatively fixed, the pulling force between the first feed pipe 23 and the first discharge pipe 13 will affect the detection accuracy of the weighing sensors. If the first feed pipe 23 and the first discharge pipe 13 are indirectly connected by a soft rubber pipe, due to the pressure difference between the inside of the temporary storage tank 20 and the external environment, abnormal weighing of the temporary storage tank 20 will occur. At the same time, since the soft rubber pipe needs to withstand pressure and powder material erosion, the thickness of the soft rubber pipe is relatively thick, often more than 5 mm. Under the influence of the pressure difference, a large pulling force will be generated on the temporary storage tank 20, which will further lead to inaccurate weighing of the temporary storage tank 20.

[0259] In this embodiment, by slidingly connecting the first feed pipe 23 and the first discharge pipe 13 in the vertical direction, the influence on the detection of the weighing sensors caused by the mutual pulling between the first feed pipe 23 and the first discharge pipe 13 can be reduced, the detection accuracy of the weighing sensors can be improved, a stable and accurate powder material supply can be provided for the subsequent processes of the powder material feeding system 100, and the consistency of production and product quality can be ensured.

[0260] In the above technical solution, since the first feed pipe 23 and the first discharge pipe 13 are slidable and inserted in the vertical direction, not only can the assembly error between the first feed pipe 23 and the first discharge pipe 13 be reduced, but also the influence on the weighing sensors of the glove box 10 or the temporary storage tank 20 during detection caused by the mutual pulling between the first feed pipe 23 and the first discharge pipe 13 can be reduced, the detection accuracy of the weighing sensors can be improved, a stable and accurate powder material supply can be provided for the subsequent processes of the powder material feeding system 100, and the consistency of production and product quality can be ensured.

[0261] In some embodiments of the present application, as Figure 4As shown, the powder feeding system 100 further includes: a first sleeve 61, which is sleeved outside the first feed pipe 23 and the first discharge pipe 13. The upper end of the first sleeve 61 is fixedly and sealingly connected to the first discharge pipe 13, and the lower end of the first sleeve 61 is fixedly and sealingly connected to the first feed pipe 23, and the first sleeve 61 is telescopic in the up and down direction.

[0262] "The first sleeve 61 is telescopic in the up and down direction" means that the length of the first sleeve 61 in the up and down direction is adjustable. In this way, when the relative position between the first feed pipe 23 and the first discharge pipe 13 changes, the length of the first sleeve 61 can change to adapt to the position change between the first feed pipe 23 and the first discharge pipe 13, thereby reducing the tension between the first feed pipe 23 and the first discharge pipe 13 and ensuring the detection accuracy of the weighing sensor.

[0263] In the above technical solution, by arranging the first sleeve 61 to be sleeved outside the first feed pipe 23 and the first discharge pipe 13, the connection position of the first feed pipe 23 and the first discharge pipe 13 can be sealed through the first sleeve 61, reducing the probability of leakage at the connection position of the first feed pipe 23 and the first discharge pipe 13, and thus ensuring the sealing performance of the connection position on the premise of realizing the up and down relative sliding of the first feed pipe 23 and the first discharge pipe 13.

[0264] In some embodiments of the present application, referring to Figure 4 , a first inflation cavity 611 is defined between the first sleeve 61, the first feed pipe 23 and the first discharge pipe 13. The first inflation cavity 611 is communicated with the first feed pipe 23 and the first discharge pipe 13. A first inflation port communicating with the first inflation cavity 611 is formed on the first sleeve 61, and the first inflation port is configured to be communicated with a gas source.

[0265] "The first inflation cavity 611 is communicated with the first feed pipe 23 and the first discharge pipe 13" means that the first feed pipe 23 and the first discharge pipe 13 are inserted and connected, and a first gap channel is formed at the insertion position between the outer peripheral wall of the inner pipe and the inner peripheral wall of the outer pipe. The first inflation cavity 611 is communicated with the inner space defined by the first feed pipe 23 and the first discharge pipe 13 through the first gap channel.

[0266] "The first inflation port is configured to be communicated with a gas source" means that the first inflation port is communicated with the gas source through a first inflation pipe. The gas source can be dry compressed air or compressed nitrogen. A first inflation fan and a first inflation valve are connected in series on the first inflation pipe. The first inflation valve is located between the outlet of the first inflation fan and the first inflation port, and the flow channel and flow rate of the air flow in the first inflation pipe can be controlled through the first inflation valve.

[0267] When the glove box 10 drops powder into the temporary storage tank 20, air can be inflated into the first inflation chamber 611 through the first inflation port. At this time, the gas inflated into the first inflation chamber 611 can enter the tube space inside the first feeding pipe 23 through the first gap channel, so that the powder can fall smoothly into the temporary storage tank 20, reducing the probability of powder leaking from the first gap channel into the first inflation chamber 611.

[0268] In the above technical solution, since a first inflation port connected to the air source is formed on the first sleeve 61, air is inflated into the first inflation cavity 611 through the first inflation port, which can reduce the probability of powder leakage from the gap between the first feed pipe 23 and the first discharge pipe 13, and improve the sealing performance between the first feed pipe 23 and the first discharge pipe 13.

[0269] In some embodiments of the present application, reference is made to Figure 4 , the first sleeve 61 is a bellows.

[0270] In the above technical solution, since the first sleeve 61 is a bellows, it can not only make the first sleeve 61 retractable in the up and down directions to adapt to the relative displacement between the first feed pipe 23 and the first discharge pipe 13, but also has better sealing performance, reducing the risk of leakage at the connection position, and the structure of the bellows is simple and easy to install.

[0271] In some embodiments of the present application, the first sleeve 61 is a rubber member.

[0272] For example, the first sleeve 61 is a bellows made of rubber and having folds in the length direction.

[0273] In the above technical solution, since the first sleeve 61 is a rubber member, the rubber member has good deformability, chemical stability and wear resistance, which can make the first sleeve 61 have good deformation ability and corrosion resistance.

[0274] In some embodiments of the present application, reference is made to Figure 4 The wall thickness of the first sleeve 61 is less than or equal to 2 mm.

[0275] For example, the wall thickness of the first sleeve 61 may be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm.

[0276] In the above technical solution, since the wall thickness of the first sleeve 61 is less than or equal to 2 mm, it can not only reduce the material usage of the first sleeve 61 and reduce the weight of the first sleeve 61, but also reduce the pulling force of the first sleeve 61 between the first feed pipe 23 and the first discharge pipe 13, thereby improving the detection accuracy of the weighing sensor.

[0277] In some embodiments of the present application, the powder feeding system 100 is configured to: when the glove box 10 feeds materials into the temporary storage tank 20, introduce gas into the first inflation chamber 611 through the first inflation port.

[0278] In the above technical solution, since gas is introduced into the first inflation chamber 611 when the glove box 10 feeds materials into the temporary storage tank 20, the gas in the first inflation chamber 611 can enter the inside of the first feed pipe 23, so that the powder can smoothly fall into the temporary storage tank 20, reducing the probability of powder leakage into the first inflation chamber 611.

[0279] In some embodiments of the present application, referring to Figure 4 , the overlapping length of the first feed pipe 23 and the first discharge pipe 13 in the vertical direction and the diameter ratio of the first feed pipe 23 or the first discharge pipe 13 is greater than or equal to 1 and less than or equal to 1.5.

[0280] For example, the overlapping length of the first feed pipe 23 and the first discharge pipe 13 in the vertical direction and the diameter ratio of the first feed pipe 23 or the first discharge pipe 13 can be 1, 1.1, 1.2, 1.3, 1.4 or 1.5.

[0281] For example, the first feed pipe 23 is sleeved outside the first discharge pipe 13, and the overlapping length of the first feed pipe 23 and the first discharge pipe 13 in the vertical direction is 1-1.5 times the diameter of the first feed pipe 23.

[0282] In the above technical solution, since the overlapping length of the first feed pipe 23 and the first discharge pipe 13 is 1-1.5 times the diameter of the first feed pipe 23 or the first discharge pipe 13, the overlapping length of the first feed pipe 23 and the first discharge pipe 13 can be long enough to reduce the risk of the first feed pipe 23 and the first discharge pipe 13 separating in the vertical direction and improve the connection reliability between the first feed pipe 23 and the first discharge pipe 13.

[0283] In the prior art, the diameters of the discharge pipe of the glove box 10 and the feed pipe of the temporary storage tank 20 are the same, and the two are connected by a hose. However, due to the airtightness of the hose connection, affected by positive or negative pressure, the deformation of the flexible connection will pull the temporary storage tank 20. Since the acting area of the hose connection is large, for example, the hose areas in the prior art are usually 132 cm 2 and 50 cm 2 , according to F = PS, under the action of the same pressure difference, the force on the weighing sensor of the temporary storage tank 20 is large.

[0284] In a specific example of the present application, the first feed pipe 23 and the first discharge pipe 13 are connected by sleeving with a large pipe and a small pipe, and the overlapping length is about 1.5 times the diameter of the large pipe. When the diameter R of the first feed pipe 23 (large pipe) is 6.5 cm and the diameter r of the first discharge pipe 13 is 6.2 cm, the clearance ring S between the large pipe and the small pipe is (R 2 - r²) = 12 cm², that is, the acting area of the internal pressure of the pipe on the first sleeve 61 is 12 cm². Among them, through the blanking air pressure optimization program, the air pressure of the first sleeve 61 during weighing is the preset weighing pressure. At the same time, the error of the air pressure (P) is controlled within ±0.1 Kpa, F = S × P = 0.12 N, and the error range generated by the connection position of the first feed pipe 23 and the first discharge pipe 13 on the weighing of the temporary storage tank 20 is about ±12 g, meeting the requirement of ±50 g in this embodiment.

[0285] A first sleeve 61 is arranged outside the connection position of the first feed pipe 23 and the first discharge pipe 13. The first sleeve 61 can reduce the generation of dust particles caused by the jitter of the first feed pipe 23 and the first discharge pipe 13. Moreover, when inflating into the first sleeve 61 during blanking, the powder can be prevented from rubbing against the first sleeve 61. Therefore, the thickness of the first sleeve 61 can be greatly reduced. Thus, the structure of the first sleeve 61 can be optimized into a corrugated hose with a thickness of 1 mm, effectively reducing the tension on the weighing sensor.

[0286] In some embodiments of the present application, as Figure 2 and Figure 5 shown, the outlet of the screw feeder 30 is connected with a downward extending second discharge pipe 31. A second discharge valve 32 is connected in series on the second discharge pipe 31. The top of the sending tank 40 is provided with a second feed pipe 41 connected to the second discharge pipe 31. A second feed valve 42 is connected in series on the second feed pipe 41. The powder feeding system 100 is configured to: be adapted to make the powder at the outlet of the screw feeder 30 fall into the sending tank 40 under the action of gravity.

[0287] That is to say, when the second discharge valve 32 and the second feed valve 42 are opened, the screw feeder 30 and the third storage chamber 401 are connected through the second discharge pipe 3 and the second feed pipe 41, and the powder can directly fall from the screw feeder 30 through the second discharge pipe 31 and the second feed pipe 41 into the third storage chamber 401 of the sending tank 40 under the action of gravity.

[0288] In this embodiment, the second discharge valve 32 and the second feed valve 42 can be used to flexibly control the timing and speed of the powder material falling from the screw feeder 30 into the sending tank 40, so that the powder material can fall at a fixed time and in a fixed quantity, meeting the process requirements of powder material feeding. At the same time, by connecting the second discharge valve 32 in series on the second discharge pipe 31 and connecting the second feed valve 42 in series on the second feed pipe 41, the sealing performance of the screw feeder 30 and the sending tank 40 can be improved, reducing the probability of external air and impurities entering the screw feeder 30 and the sending tank 40, and ensuring the quality of the powder material.

[0289] In the above technical solution, by using gravity to directly let the powder material in the screw feeder 30 fall into the sending tank 40, without the need for additional power equipment to drive the transmission, the equipment cost can be reduced, the energy consumption can be reduced, the transmission process of the powder material can be simplified, the transmission efficiency can be improved, and the powder material can be quickly and smoothly transferred from the screw feeder 30 to the sending tank 40. By setting the second feed valve 42 and the second discharge valve 32, the powder material can fall into the sending tank 40 according to a predetermined time, a predetermined quantity, and a predetermined speed according to the process requirements, improving the automation degree of the production process and meeting the process requirements of feeding.

[0290] In some embodiments of the present application, as Figure 5 shown, the second feed pipe 41 and the second discharge pipe 31 can be slidably relative to each other in the vertical direction and are inserted and connected.

[0291] It should be noted that in actual production, the relative positions of the screw feeder 30 and the sending tank 40 may change due to fine adjustment of the installation position, equipment vibration settlement, etc. In this embodiment, by adopting a slidable plug-in connection method for the second feed pipe 41 and the second discharge pipe 31, this position change can be automatically adapted, ensuring the continuity of powder material transportation, reducing pipeline damage or connection loosening caused by position deviation, and ensuring the smooth progress of production.

[0292] In addition, when the sending tank 40 is provided with a weighing sensor for detecting weight, if the second feed pipe 41 and the second discharge pipe 31 are relatively fixed, the force of mutual pulling between the second feed pipe 41 and the second discharge pipe 31 will affect the detection accuracy of the weighing sensor. If the second feed pipe 41 and the second discharge pipe 31 are indirectly connected by a soft rubber pipe, due to the pressure difference between the inside and the outside environment of the sending tank 40, abnormal weighing of the sending tank 40 will occur. At the same time, since the soft rubber pipe needs to withstand pressure and the erosion of the powder material, the thickness of the soft rubber pipe is relatively thick, usually more than 5 mm. Under the influence of the pressure difference, a large pulling force will be generated on the sending tank 40, which will further cause inaccurate weighing of the storage tank 20.

[0293] In this embodiment, by slidingly connecting the second feed pipe 41 and the second discharge pipe 31 in the vertical direction, the influence on the detection of the load cell caused by the mutual pulling between the second feed pipe 41 and the second discharge pipe 31 can be reduced, the detection accuracy of the load cell can be improved, a stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system 100, and the consistency of production and the product quality can be ensured.

[0294] In the above technical solution, since the second feed pipe 41 and the second discharge pipe 31 are slidable and inserted in the vertical direction, not only can the assembly error between the second feed pipe 41 and the second discharge pipe 31 be reduced, but also the influence on the detection of the load cell of the sending tank 40 caused by the mutual pulling between the second feed pipe 41 and the second discharge pipe 31 can be reduced, the detection accuracy of the load cell can be improved, a stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system 100, and the consistency of production and the product quality can be ensured.

[0295] In some embodiments of the present application, as Figure 5 shown, the powder feeding system 100 further includes: a second sleeve 62, the second sleeve 62 is sleeved outside the second feed pipe 41 and the second discharge pipe 31, the upper end of the second sleeve 62 is fixedly and sealingly connected to the second discharge pipe 31, the lower end of the second sleeve 62 is fixedly and sealingly connected to the second feed pipe 41, and the second sleeve 62 is telescopable in the vertical direction. A second inflation chamber 621 is defined between the second sleeve 62 and the second feed pipe 41 and the second discharge pipe 31, the second inflation chamber 621 is communicated with the second feed pipe 41 and the second discharge pipe 31, a second inflation port communicated with the second inflation chamber 621 is formed on the second sleeve 62, and the second inflation port is configured to be communicated with a gas source.

[0296] "The second sleeve 62 is telescopable in the vertical direction" means that the length of the second sleeve 62 in the vertical direction is adjustable. Thus, when the relative position between the second feed pipe 41 and the second discharge pipe 31 changes, the length of the second sleeve 62 can change to adapt to the position change between the second feed pipe 41 and the second discharge pipe 31, thereby reducing the pulling force between the second feed pipe 41 and the second discharge pipe 31 and ensuring the detection accuracy of the load cell of the sending tank 40.

[0297] "The second inflation chamber 621 is communicated with the second feed pipe 41 and the second discharge pipe 31" means that the second feed pipe 41 and the second discharge pipe 31 are inserted and connected, and a second gap channel is formed at the insertion position between the outer peripheral wall of the inner pipe and the inner peripheral wall of the outer pipe. The second inflation chamber 621 is communicated with the inner space defined by the second feed pipe 41 and the second discharge pipe 31 through the second gap channel.

[0298] "The second inflation port is configured to communicate with a gas source" means that the second inflation port is connected to the gas source through a second inflation pipe. The gas source can be dry compressed air or compressed nitrogen. A second inflation fan and a second inflation valve are connected in series on the second inflation pipe. The second inflation valve is located between the outlet of the second inflation fan and the second inflation port. The passage and flow rate of the air flow in the second inflation pipe can be controlled through the second inflation valve. Among them, the first inflation fan and the second inflation fan can be the same fan or two independent fans.

[0299] When the screw feeder 30 feeds materials into the sending tank 40, air can be inflated into the second inflation chamber 621 through the second inflation port. At this time, the gas inflated into the second inflation chamber 621 can enter the inner pipe space of the second feed pipe 41 through the second gap channel, so that the powder can smoothly fall into the sending tank 40, reducing the probability of the powder leaking from the second gap channel into the second inflation chamber 621.

[0300] In the above technical solution, by providing the second sleeve 62 sleeved outside the second feed pipe 41 and the second discharge pipe 31, the connection position between the second feed pipe 41 and the second discharge pipe 31 can be sealed through the second sleeve 62, reducing the probability of leakage at the connection position between the second feed pipe 41 and the second discharge pipe 31 and ensuring the sealing performance of the connection position. Since the second sleeve 62 is formed with a second inflation port communicating with the gas source, inflating the second inflation chamber 621 through the second inflation port can reduce the probability of the powder leaking from the gap between the second feed pipe 41 and the second discharge pipe 31, improving the sealing performance between the second feed pipe 41 and the second discharge pipe 31.

[0301] In some embodiments of the present application, refer to Figure 5 , the second sleeve 62 is a bellows. It can not only make the second sleeve 62 telescopic in the up and down direction to adapt to the relative displacement between the second feed pipe 41 and the second discharge pipe 31, but also has good sealing performance, reducing the risk of leakage at the connection position, and the structure of the bellows is simple and convenient to install.

[0302] In some embodiments of the present application, the second sleeve 62 is a rubber part. For example, the second sleeve 62 is a bellows made of rubber material and having wrinkles in the length direction. Since the rubber part has good deformability, chemical stability and wear resistance, the second sleeve 62 can have good deformation ability and corrosion resistance.

[0303] In some embodiments of the present application, the wall thickness of the second sleeve 62 is less than or equal to 2 mm. For example, the wall thickness of the second sleeve 62 can be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, etc. Thereby, not only can the material usage of the second sleeve 62 be reduced, the weight of the second sleeve 62 be reduced, but also the pulling force of the second sleeve 62 between the second feed pipe 41 and the second discharge pipe 31 can be reduced, and the detection accuracy of the load cell can be improved.

[0304] In some embodiments of the present application, the powder feeding system 100 is configured to: when the screw feeder 30 feeds materials into the sending tank 40, gas is introduced into the second inflation chamber 621 through the second inflation port. Thereby, the gas introduced into the second inflation chamber 621 can enter the interior of the second feed pipe 41, so that the powder can smoothly fall into the sending tank 40, and the probability of the powder leaking into the second inflation chamber 621 is reduced.

[0305] In some embodiments of the present application, referring to Figure 5 , the overlapping length of the second feed pipe 41 and the second discharge pipe 31 in the up-down direction and the diameter ratio of the second feed pipe 41 or the second discharge pipe 31 is greater than or equal to 1 and less than or equal to 1.5.

[0306] For example, the overlapping length of the second feed pipe 41 and the second discharge pipe 31 in the up-down direction and the diameter ratio of the second feed pipe 41 or the second discharge pipe 31 can be 1, 1.1, 1.2, 1.3, 1.4, or 1.5. For example, the second feed pipe 41 is sleeved outside the second discharge pipe 31, and the overlapping length of the second feed pipe 41 and the second discharge pipe 31 is 1 - 1.5 times the diameter of the second feed pipe 41.

[0307] Thereby, the overlapping length of the second feed pipe 41 and the second discharge pipe 31 can be made long enough to reduce the risk of the second feed pipe 41 and the second discharge pipe 31 separating in the up-down direction and improve the connection reliability between the second feed pipe 41 and the second discharge pipe 31.

[0308] In a second aspect, an embodiment of the present application further provides a production system 1000, including the powder feeding system 100 according to any one of the above embodiments and a pulping system 800. The pulping system 800 includes a pulping tank 80, and the outlet of the sending tank 40 is connected to the powder inlet of the pulping tank 80.

[0309] The pulping tank 80 is a container with a stirring chamber, and is used for mixing and stirring various raw materials to generate a slurry with specific properties.

[0310] In the above technical solution, since the production system 1000 is provided with the above-mentioned powder feeding system 100, and the powder feeding system 100 is provided with a screw feeder 30 between the temporary storage tank 20 and the sending tank 40, and the powder in the temporary storage tank 20 is conveyed into the sending tank 40 through the screw feeder 30, it can not only automatically convey the powder in the temporary storage tank 20 into the sending tank 40, but also accurately measure the weight of the powder for batching into the sending tank 40, realizing highly automated batching of the powder and improving the batching efficiency.

[0311] In some embodiments of the present application, the number of pulping tanks 80 is multiple, and the powder inlets of the multiple pulping tanks 80 are all connected to the outlet of the sending tank 40.

[0312] For example, the number of pulping tanks 80 can be two, three, four, five, six, seven, eight or more, etc.

[0313] In the above technical solution, by setting multiple pulping tanks 80 connected to the sending tank 40, thus, one sending tank 40 can feed materials to multiple pulping tanks 80, thereby improving the equipment utilization rate of the sending tank 40, improving the comprehensive equipment efficiency of the powder feeding system 100, and improving the production efficiency of the production system 1000.

[0314] In a third aspect, the embodiments of the present application further provide a control method for the powder feeding system 100 in any one of the above embodiments, and the control method includes: S11, confirming that a batching instruction for conveying powder to the sending tank 40 is received; S12, controlling the screw feeder 30 to convey a first target weight of powder from the temporary storage tank 20 to the sending tank 40.

[0315] The powder feeding system 100 or the production system 1000 of this embodiment further includes a control system, and the control system is used to control the automatic feeding process of the powder feeding system 100 and is used to control the automatic production process of the production system 1000.

[0316] S11, confirming that a batching instruction for conveying powder to the sending tank 40 is received. For example, when it is detected that there is no powder in the sending tank 40 or the powder quantity is less than the preset quantity, the control system issues a batching instruction for conveying powder to the sending tank 40. Another example is that when a certain pulping tank 80 of the pulping system 800 needs to be fed with powder, the pulping system 800 sends a batching request to the powder feeding system 100. At this time, the control system can issue a batching instruction for conveying powder to the sending tank 40. After the powder feeding system 100 receives the batching instruction, it controls the conveyance of powder to the sending tank 40.

[0317] S12. Control the screw feeder 30 to convey the powder of the first target weight from the temporary storage tank 20 to the sending tank 40. In the pulping system 800, the conveying amount of the powder affects the proportion of the slurry, and thus affects the quality of the slurry. Therefore, when conveying the powder to the sending tank 40, not only the conveying of the powder is controlled, but also the weight of the conveyed powder needs to be accurately controlled to ensure the product quality of the subsequent processes.

[0318] In the above technical solution, the powder feeding system 100 confirms that it has received the batching instruction to convey the powder to the sending tank 40; then controls the screw feeder 30 to convey the powder of the first target weight from the temporary storage tank 20 to the sending tank 40. Thus, not only can the automatic conveying of the powder be realized through the screw feeder 30, but also the conveying amount of the powder can be accurately controlled, and further the amount of the powder conveyed from the sending tank 40 to the pulping system 800 can be accurately controlled. Compared with the batching method of manually weighing and then using fixed packaging to feed into the glove box 10, this embodiment not only has a high degree of batching automation, can quickly achieve mass production, but also can reduce the contact between personnel and the powder and reduce the harm of the powder to health.

[0319] In some embodiments of the present application, step S12 includes: S121. Control the screw feeder 30 to rotate at a first speed to convey the powder; S122. Confirm that the weight of the conveyed powder has reached a first preset weight, and the first preset weight is less than the first target weight; S123. Control the screw feeder 30 to rotate at a second speed to convey the powder, and the second speed is less than the first speed.

[0320] In this embodiment, the screw feeder 30 first rotates at the first speed to feed the material, and then rotates at the second speed to feed the material. Since the second speed is less than the first speed, the feeding amount per unit time when rotating at the first speed is greater than the feeding amount per unit time when rotating at the second speed. That is, when the screw feeder 30 feeds the material, it first rotates at a higher speed to improve the batching speed and efficiency, and then reduces the rotation speed for batching to achieve accurate batching.

[0321] It should be noted that the first preset weight is a preset value. Confirming that the weight of the conveyed powder has reached the first preset weight means that the weight of the remaining unbatched powder is less than the set value. At this time, the remaining powder weight is less. If the batching is carried out at a high speed rotation mode, it is easy to make the batching weight exceed the first target weight, resulting in inaccurate batching.

[0322] In the above technical solution, control the screw feeder 30 to rotate at a high first speed for batching until the batching weight reaches the first preset weight, and then rotate at a reduced second speed for batching. Thus, not only can fast batching be achieved, but it is also beneficial to achieve accurate batching.

[0323] In some embodiments of the present application, after S123, the control method further includes: S124, introducing gas into the buffer tank 20 to purge the buffer tank 20 and the screw feeder 30; S125, confirming that the weight of the conveyed powder material reaches the first target weight.

[0324] S124, introducing gas into the buffer tank 20 to purge the buffer tank 20 and the screw feeder 30. For example, control the start of the second dust removal fan connected to the buffer tank 20, open the second dust removal valve 522 on the second gas pipe 521 connected in series between the second dust removal fan and the buffer tank 20, and introduce compressed nitrogen with a certain pressure into the buffer tank 20, so that the residual powder material on the inner walls of the buffer tank 20 and the screw feeder 30 can flow towards the sending tank 40 under the drive of the dust removal gas, to ensure that the powder material in the buffer tank 20 and the screw feeder 30 can completely enter the sending tank 40.

[0325] S125, confirming that the weight of the conveyed powder material reaches the first target weight. For example, the weight of the buffer tank 20 can be detected by a weighing sensor, and the actual weight of the powder material conveyed from the buffer tank 20 to the sending tank 40 can be obtained by calculation. Specifically, before the buffer tank 20 conveys the powder material to the sending tank 40 through the screw feeder 30, first obtain the weight of the buffer tank 20. After the buffer tank 20 conveys the powder material to the sending tank 40 through the screw feeder 30, obtain the weight of the buffer tank 20 again. The difference between the weights of the buffer tank 20 at the two times is the actual weight of the powder material conveyed from the buffer tank 20 to the sending tank 40 through the screw feeder 30. When the actual weight is equal to the first target weight, the conveying is completed. When the actual weight is less than the first target weight, it means that some powder material has not been completely conveyed. When the actual weight is greater than the first target weight, it means that the weight of the conveyed powder material is excessive.

[0326] In the above technical solution, after conveying the powder material to the sending tank 40 through the screw feeder 30, purge the buffer tank 20 and the screw feeder 30 until the powder material conveyed to the sending tank 40 reaches the first target weight. Thus, not only can the accurate conveying of a predetermined weight of powder material be achieved, but also the probability of the powder material adhering to the inner walls of the buffer tank 20 and the screw feeder 30 can be reduced, the service life of the buffer tank 20 and the screw feeder 30 can be extended, the waste of powder material can be reduced, and the risk of the powder material contacting the operating personnel can be lowered.

[0327] In some embodiments of the present application, after step S12, the control method further includes: S13, confirming that a feeding instruction for feeding the pulping system 800 is received; S14, driving the sending tank 40 to vibrate and introducing conveying gas into the sending tank 40 to convey the powder material in the sending tank 40 to the pulping system 800.

[0328] When the control system issues a feeding instruction to feed the pulping system 800, the powder feeding system 100 controls the sending tank 40 to feed the pulping system 800. Among them, the sending tank 40 can transport the powder to the pulping system 800 by means of positive pressure conveying.

[0329] In some examples, after receiving the feeding instruction to feed the pulping system 800, the vibrator provided on the sending tank 40 can be started to drive the sending tank 40 to vibrate. At the same time, control the start of the third dust removal fan connected to the sending tank 40, open the third dust removal valve 532 on the third air pipe 531 connected in series between the third dust removal fan and the sending tank 40. The third dust removal valve 532 can be a pneumatic butterfly valve, and compressed nitrogen with a certain pressure is introduced into the sending tank 40. The powder in the sending tank 40 is blown into the pulping system 800 through the pipeline under the vibration of the vibrator and the entrainment of the compressed nitrogen.

[0330] In the above technical solution, after receiving the feeding instruction to feed the pulping system 800, by driving the sending tank 40 to vibrate and introducing conveying compressed nitrogen into the sending tank 40, the powder can be premixed with the compressed nitrogen, improving the powder conveying efficiency and the subsequent pulping efficiency of the pulping system 800.

[0331] The following refers to Figure 6 and Figure 7 to describe the control method of the powder feeding system 100 according to the fourth aspect embodiment of the present application. Figure 6 is the control flow chart of the powder feeding system 100 when shaking and cleaning the glove box 10 according to the embodiment of the present application. Figure 7 is the control flow chart of the powder feeding system 100 when purging the glove box 10 according to the embodiment of the present application. The glove box 10 includes a box body 11 and a first lining layer 12 provided inside the box body 11.

[0332] Refer to Figure 6 , the control method of the powder feeding system 100 according to the fourth aspect embodiment of the present application includes: S21, confirming that the glove box 10 has completed discharging to the temporary storage tank 20; S22, driving the first lining layer 12 to vibrate; S23, purging the inner wall of the glove box 10.

[0333] That is to say, after confirming that the glove box 10 has completed discharging, first start the lining shaking function of the glove box 10, so that the residual powder adhering to the first lining layer 12 falls into the temporary storage tank 20. Specifically, the first fan and the first vacuum pump connected to the first gap space 102 of the glove box 10 can be alternately opened to make the pressure in the first gap space 102 change repeatedly to drive the first lining layer 12 to vibrate. After the first lining layer 12 vibrates for a certain period of time, then start the blowing function of the glove box 10.

[0334] Among them, the jitter duration of the first inner liner 12 can be 10s - 100s. For example, the first inner liner 12 can jitter continuously for 10s, 15s, 20s, 25s, 30s, 35s, 40s, 45s, 50s, 55s, 60s, 65s, 70s, 75s, 80s, 85s, 90s, 95s or 100s.

[0335] When starting the blowing function of the glove box 10, the first dust removal fan connected to the glove box 10 can be started, and the first dust removal valve 512 connected in series on the first air pipe 511 between the first dust removal fan and the glove box 10 can be opened. Among them, the time for purging the inner wall of the glove box 10 can be a set time, or it can be determined whether to close the first dust removal fan and the first dust removal valve 512 according to whether the weight of the powder falling into the temporary storage tank 20 from the glove box 10 reaches a preset blanking value.

[0336] In some examples, multiple first dust removal valves 512 can be connected in series on the first air pipe 511. The first dust removal valve 512 can be an explosion-proof solenoid valve, and the first dust removal valve 512 can also be a pressure regulating valve. The pressure regulating valve can be used to adjust the gas pressure blown into the glove box 10.

[0337] In the above technical solution, after confirming that the blanking of the glove box 10 is completed, first drive the first inner liner 12 to vibrate so that the powder adhering to the first inner liner 12 falls into the temporary storage tank 20, and then purge the inner wall of the glove box 10 to further clean the residual powder in the glove box 10. Thus, the residual powder in the glove box 10 can be reduced, the powder loss can be reduced, and the health risk of the operator caused by contacting the powder can be reduced.

[0338] Refer to Figure 6 And in combination with Figure 3 , in some embodiments of the present application, a first gap space 102 is formed between the box body 11 and the first inner liner 12. Step S22 includes: S221, introducing gas into the first gap space 102 and lasting for a first preset time; S222, sucking the gas in the first gap space 102 and lasting for a second preset time; S223, detecting whether the weight of the powder falling from the glove box 10 into the temporary storage tank 20 reaches a second target weight. If so, the blanking ends. If not, execute S221.

[0339] For example, in step S221, a gas at a first preset pressure can be introduced into the first gap space 102 and maintained for a first preset time. The first preset time can be 2 s to 10 s. For example, the first preset time can be 3 s, 4 s, 5 s, 6 s, 7 s, 8 s, 9 s, 10 s, or 11 s, etc. The first preset pressure can be 3 kPa to 15 kPa. For example, the first preset pressure can be 3 kPa, 4 kPa, 5 kPa, 6 kPa, 7 kPa, 8 kPa, 9 kPa, 10 kPa, 11 kPa, 12 kPa, 13 kPa, or 14 kPa, etc.

[0340] For example, in step S222, the gas in the first gap space 102 can be suctioned at a second preset pressure and maintained for a second preset time. In some examples, the second preset time can be 2 s to 10 s. For example, the second preset time can be 3 s, 4 s, 5 s, 6 s, 7 s, 8 s, 9 s, 10 s, or 11 s, etc. The second preset pressure can be -3 kPa to -15 kPa. For example, the second preset pressure can be -3 kPa, -4 kPa, -5 kPa, -6 kPa, -7 kPa, -8 kPa, -9 kPa, -10 kPa, -11 kPa, -12 kPa, -13 kPa, or -14 kPa, etc.

[0341] Among them, the ventilation or stop of ventilation into the first gap space 102 can be controlled by opening and closing the intake valve on the connecting pipe connected in series between the first fan and the first gap space 102. Whether to evacuate the first gap space 102 can be controlled by opening and closing the vacuum valve on the connecting pipe connected in series between the first vacuum pump and the first gap space 102.

[0342] In step S223, when the weight of the glove box 10 discharging materials into the temporary storage tank 20 reaches the second target weight, it means that all the powder materials put into the glove box 10 have fallen into the sending tank 40. At this time, even if there is powder residue in the glove box 10, the residue amount of the powder is within a reasonable error range, indicating that the glove box 10 has completed all material discharging. When the weight of the glove box 10 discharging materials into the temporary storage tank 20 is less than the second target weight, it means that some of the powder materials put into the glove box 10 have not fallen into the sending tank 40. At this time, the residue amount of the powder in the glove box 10 is excessive, exceeding the reasonable error range, and the shaking function of the first inner liner 12 needs to be restarted to continue shaking off the residual powder on the first inner liner 12.

[0343] In the above technical solution, by first introducing gas into the first gap space 102 and then sucking the gas in the first gap space 102, the shaking of the first inner liner 12 can be achieved to shake off the powder adhered to the first inner liner 12. Then, the weight of the powder falling from the glove box 10 into the temporary storage tank 20 is detected to judge the residual amount of the powder in the glove box 10, and further judge whether the powder in the glove box 10 is completely shaken off. Thus, it can be ensured that the powder in the glove box 10 completely falls into the temporary storage tank 20.

[0344] Referring to Figure 6 , in some embodiments of the present application, in step S223, when the weight of the powder falling into the temporary storage tank 20 does not reach the second target weight, the control method further includes: judging whether the total running time of step S22 is greater than the third preset time. If not, then execute S221. If so, an alarm message of material falling timeout is issued.

[0345] The "total running time of step S22" refers to: the total running time of driving the first inner liner 12 to vibrate. Among them, the total running time of driving the first inner liner 12 to vibrate not only includes the actual vibration time of the first inner liner 12, but also includes the intermittent time between two vibrations of the first inner liner 12. For example, timing can start from the vibration of the first inner liner 12. Each time the weight of the powder falling into the temporary storage tank 20 is measured, the vibration time of the first inner liner 12 is read once, that is, the total running time of step S22 at the current time.

[0346] The third preset time can be preset in advance. For example, the third preset time can be set according to the preset vibration amplitude and frequency of the first inner liner 12. When the total running time of step S22 is greater than the third running time, it is considered that the shaking time of the first inner liner 12 is long enough, and under normal circumstances, it is sufficient to shake off all the powder adhered to the first inner liner 12 into the temporary storage tank 20.

[0347] Therefore, when the total running time of step S22 is less than the third running time and the weight of the powder falling into the temporary storage tank 20 has not reached the second target weight, it means that the shaking and cleaning time of the first inner liner 12 is not enough, there is still powder adhered to the first inner liner 12, and it is necessary to continue to vibrate the first inner liner 12 to continue to shake off the powder on the first inner liner 12 to achieve complete material falling.

[0348] When the total running time of step S22 is greater than the third running time, if the weight of the powder falling into the temporary storage tank 20 has not reached the second target weight, it means that there are other abnormal situations that cause the material falling to be unable to be completed smoothly. At this time, an alarm message can be issued to notify the operator that the material falling is overtime and there may be abnormal situations in the glove box 10 or the temporary storage box.

[0349] In the above technical solution, when the weight of the powder material falling into the temporary storage tank 20 does not reach the second target weight and the total running time of step S22 is greater than the third preset time, an alarm message of material falling timeout is sent, which can prompt the operator that the material falling is abnormal and reduce the occurrence of the situation that the first inner lining 12 vibrates for dust removal continuously due to the weight of the powder material falling into the temporary storage tank 20 not reaching the second target weight.

[0350] Refer to Figure 7 , in some embodiments of the present application, step S23 includes: S231, detecting and confirming that the pressure in the glove box 10 is less than the first preset pressure; S232, introducing a purging gas into the glove box 10; S233, confirming that the pressure in the glove box 10 is greater than the first preset pressure and lasts for the first time; S234, stopping introducing the purging gas into the glove box 10; S235, detecting and judging whether the pressure in the glove box 10 is less than the second preset pressure, the second preset pressure is less than the first preset pressure, if so, ending the purging, if not, executing S232.

[0351] In some examples, before step S231, step S23 further includes: S230, detecting and confirming that the first discharge valve 14 on the first discharge pipe 13 of the glove box 10 is opened, and detecting and confirming that the first feed valve 24 on the first feed pipe 23 of the temporary storage tank 20 is opened.

[0352] Among them, in step S231, the pressure in the glove box 10 can be detected by a pressure detection sensor, and then it is judged whether the current pressure in the glove box 10 is less than the first preset pressure, and the first preset pressure can be set as a positive pressure greater than 0 kPa. For example, the first preset pressure can be 1 kPa.

[0353] S232, introducing a purging gas into the glove box 10. For example, controlling to start the first dust removal fan connected to the glove box 10, opening the first dust removal valve 512 on the first air pipe 511 connected in series between the first dust removal fan and the glove box 10, and introducing compressed nitrogen with a certain pressure into the glove box 10, so that the powder material remaining on the inner wall of the glove box 10 can flow towards the temporary storage tank 20 under the drive of the dust removal gas.

[0354] In some examples, in step S233, the first time can be 2 s - 10 s. For example, the first time can be 2 s, 3 s, 4 s, 5 s, 6 s, 7 s, 8 s, 9 s or 10 s.

[0355] It should be noted that during the process of purging the glove box 10, since a gas with a certain pressure is introduced into the glove box 10, therefore, as the purging progresses, the pressure in the glove box 10 will gradually increase, and when the pressure in the glove box 10 is too high and lasts for too long, the gloves in the glove box 10 will be pressed out of the outer side of the box body 11, affecting the normal operation of the glove box 10.

[0356] Therefore, in this embodiment, when it is detected that the pressure in the glove box 10 is greater than the first preset pressure and the duration is greater than or equal to the first time, the control stops blowing gas into the glove box 10. Specifically, the first dust removal valve 512 on the first air pipe 511 connected in series between the first dust removal fan and the glove box 10 can be closed. Thereby, the risk of excessive pressure in the glove box 10 can be reduced.

[0357] In step S235, the second preset pressure can be 0 kPa. That is, by detecting whether the pressure in the glove box 10 is less than the second preset pressure, it can be determined whether the pressure in the glove box 10 is positive pressure or negative pressure.

[0358] After the first dust removal valve 512 is closed, since the glove box 10 is connected to the temporary storage tank 20, the gas in the glove box 10 will continue to flow into the temporary storage tank 20, reducing the pressure in the glove box 10. After a certain time of closing the first dust removal valve 512, the pressure in the glove box 10 is detected again. If the pressure in the glove box 10 is negative pressure, it means that the pressure in the glove box 10 is appropriate, and there is no need to purge again at this time. When the pressure in the glove box 10 is positive pressure, it is not conducive to keeping the glove box 10 working normally. At this time, the glove box 10 is purged again to drive the gas in the glove box 10 to flow into the temporary storage tank 20, which not only realizes the secondary cleaning of the inner wall of the glove box 10, but also helps to reduce the pressure of the glove box 10 after stopping the purge, keeping the glove box 10 in a negative pressure state so that the glove box 10 can work normally.

[0359] In the above technical solution, not only can the glove box 10 be purged and cleaned to reduce the residual powder on the inner wall of the glove box 10, but also the pressure in the glove box 10 can be kept in a negative pressure state after purging, ensuring the normal operation of the glove box 10.

[0360] In some embodiments of the present application, step S231 includes: S231, detecting the pressure in the glove box 10; S2312, comparing the detected pressure of the glove box 10 with the first preset pressure and the third preset pressure, the third preset pressure is less than the second preset pressure and the first preset pressure. If the pressure in the glove box 10 is less than the third preset pressure, then S2313 is executed. If the pressure in the glove box 10 is greater than the third preset pressure and less than the first preset pressure, then S232 is executed; S2313, closing the dust removal fan 50 connected to the glove box 10 and opening the dust removal valve connected to the glove box 10; S2314, after detecting and confirming that the pressure in the glove box 10 is greater than the second preset pressure, then S23 is executed.

[0361] In some examples, the third preset pressure can be set to a negative pressure less than 0 kPa. For example, the third preset pressure can be -1 kPa.

[0362] In this embodiment, after starting the purging program in the glove box 10, the pressure in the glove box 10 is first detected and judged. According to the pressure value in the glove box 10, it is determined whether to start the first dust removal fan and the first dust removal valve 512 to purge the glove box 10. Among them, since the glove box 10 has completed the blanking to the temporary storage tank 20, when the pressure in the glove box 10 is relatively low and lower than the third preset pressure, in order to avoid the pressure in the glove box 10 being too low and affecting the normal operation of the glove box 10, the first dust removal fan is not started, but the first dust removal valve 512 connected in series between the first dust removal fan and the glove box 10 is opened. At this time, the gas from the gas source can also enter the glove box 10 through the first air pipe 511 and the first dust removal valve 512, slowly increasing the pressure in the glove box 10. When it is detected that the pressure in the glove box 10 is positive pressure, purge gas can be introduced into the glove box 10.

[0363] In the above technical solution, when the pressure in the glove box 10 is lower than the third preset pressure, the first dust removal fan is not started, and only the first dust removal valve 512 is opened, which can increase the pressure in the glove box 10 and reduce the occurrence of the situation that the pressure in the glove box 10 is too low due to directly purging the glove box 10, ensuring that the glove box 10 can operate normally.

[0364] The following refers to Figure 8 Describe the control method of the powder feeding system 100 according to the fifth aspect embodiment of the present application, Figure 8 It is the control flow chart of the batching of the powder feeding system 100 from the glove box 10 to the temporary storage tank 20 and then to the sending tank 40 according to the embodiment of the present application;

[0365] Refer to Figure 8 , the control method of the powder feeding system 100 according to the fifth aspect embodiment of the present application includes: S31, obtaining the initial weight of the temporary storage tank 20; S32, controlling the glove box 10 to feed materials into the temporary storage tank 20; S33, obtaining the weight of the temporary storage tank 20 after the glove box 10 feeds materials into the temporary storage tank 20 as the first weight; S34, controlling the temporary storage tank 20 to feed materials to the sending tank 40; S35, obtaining the weight after the temporary storage tank 20 feeds materials as the second weight; S36, confirming that the difference between the second weight and the initial weight is within the preset range; S37, the feeding ends. Among them, when obtaining the weight of the temporary storage tank 20, the pressure in the temporary storage tank 20 is adjusted to the preset weighing pressure.

[0366] It should be noted that when both the feed pipe and the discharge pipe of the temporary storage tank 20 adopt flexible connections (the first sleeve 61 and the second sleeve 62), in order to eliminate the pulling of the flexible connections on the weighing sensors, two basic conditions need to be met: First, the pressure difference between the powder feeding system 100 and the ambient pressure is approximately equal to 0 kPa. However, since the powder feeding system 100 is not connected to the external environment, this condition cannot be satisfied. Second, the pressure difference between the glove box 10 and the temporary storage tank 20 is approximately equal to 0 kPa, and the pressure difference between the temporary storage tank 20 and the sending tank 40 is approximately equal to 0 kPa. Since the glove box 10 cannot be under positive pressure, this condition is also difficult to meet. Therefore, to maximize the reduction of the influence of the flexible connections (the first sleeve 61 and the second sleeve 62) on the weighing sensors, an easier solution is to keep the pressure differences between equipment and equipment, and between the system and the environment constant, and complete the feeding under a constant pressure difference.

[0367] That is to say, since the first storage cavity 101 of the glove box 10, the second storage cavity 201 of the temporary storage tank 20, and the third storage cavity 401 of the sending tank 40 are all isolated from the external environment, when the internal pressures of the glove box 10, the temporary storage tank 20, and the sending tank 40 are different, the values detected by the weighing sensors used to detect the weights of the glove box 10, the temporary storage tank 20, and the sending tank 40 are also different. Therefore, to improve the detection accuracy of the weight of the temporary storage tank 20, when detecting the weight of the temporary storage tank 20, the pressure inside the temporary storage tank 20 is adjusted to the same preset pressure value, such as adjusting it to the preset weighing pressure, so as to significantly reduce the weighing error caused by the different internal pressures of the temporary storage tank 20.

[0368] In some examples, the preset weighing pressure can be a negative pressure. Specifically, the preset weighing pressure can be from -3 kPa to -10 kPa. For example, the preset weighing pressure can be -3 kPa, -4 kPa, -5 kPa, -6 kPa, -7 kPa, -8 kPa, -9 kPa, or -10 kPa.

[0369] In step S31, before each feeding through the powder feeding system 100 to the pulping system 800, the initial weight of the temporary storage tank 20 can be obtained to facilitate accurate measurement of the feeding amount each time.

[0370] In step S32, controlling the feeding of materials from the glove box 10 into the temporary storage tank 20 includes: opening the first discharge valve 14 of the glove box 10 and the first feed valve 24 of the temporary storage tank 20, and the powder in the glove box 10 falls into the temporary storage tank 20 under the action of gravity, and then it is confirmed that the feeding from the glove box 10 to the temporary storage tank 20 is completed (refer to the aforementioned step S21); driving the first inner lining 12 to vibrate (refer to the aforementioned step S22); purging the inner wall of the glove box 10 (refer to the aforementioned step S23).

[0371] Next, in step S33, again under the preset weighing pressure condition, the weight of the buffer tank 20 is obtained. At this time, the weight of the buffer tank 20 is the first weight. Among them, the first weight - the initial weight is the weight of the powder conveyed from the glove box 10 into the buffer tank 20 this time.

[0372] In step S34, starting the screw feeder 30 can convey the powder in the buffer tank 20 into the sending tank 40. After the conveying is completed, the pressure of the buffer tank 20 is readjusted to the preset weighing pressure, and the second weight of the buffer tank 20 is obtained. At this time, the first weight - the second weight is the weight of the powder conveyed from the buffer tank 20 to the sending tank 40 this time, and it is also the weight of the powder that the powder feeding system 100 is about to convey to the pulping system 800 this time.

[0373] Among them, the initial weight is the weight of the buffer tank 20 when no powder is put into the buffer tank 20, and the second weight is the weight of the buffer tank 20 after the powder falling from the glove box 10 into the buffer tank 20 is conveyed to the sending tank 40. That is to say, under normal circumstances, both the initial weight and the second weight do not include the weight of the powder and are the weights of the buffer tank 20 itself. Therefore, when the powder is completely conveyed and put into the sending tank 40, the initial weight and the second weight should be equal, or the difference between the initial weight and the second weight is within the error precision requirement range. Therefore, when the difference between the second weight and the initial weight is within the preset range, it means that the powder in the glove box 10 is completely conveyed and put into the sending tank 40.

[0374] In the above technical solution, the weight of the buffer tank 20 under the preset weighing pressure is obtained respectively before the powder falls into the buffer tank 20, after the powder falls, and after the buffer tank 20 feeds the powder to the sending tank 40, which can significantly reduce the weighing error caused by the different internal pressures of the buffer tank 20, so as to accurately measure the weight of the powder conveyed from the glove box 10 to the sending tank 40, and can also monitor and reduce the adhesion amount of the powder in the glove box 10 and the buffer tank 20 to the greatest extent during the whole conveying process of the powder feeding system 100, reducing powder loss.

[0375] In some examples, the weighing sensor for weighing the weight of the buffer tank 20 needs to perform a zero calibration of the scale. Specifically, close the first discharge valve 14 of the glove box 10, open the first feed valve 24 of the buffer tank 20, open the second discharge valve 32 of the buffer tank 20, close the second feed valve 42 of the sending tank 40, and adjust the pressure of the buffer tank 20 to -5 kPa for zero calibration; when the pressure value of the buffer tank 20 becomes 0, theoretically the weight display of the buffer tank 20 is about 3.5 kg, but actually the true value cannot be calculated because the flexible connections (the first sleeve 61 and the second sleeve 62) will deform.

[0376] In some embodiments of the present application, step S31 includes: S311, introducing an inert gas into the storage tank 20 to displace the air in the storage tank 20; S312, closing the first discharge valve 14 of the glove box 10 and opening the first feed valve 24 of the storage tank 20; S313, adjusting the air pressure in the storage tank 20 to a preset weighing pressure; S314, obtaining the current weight of the storage tank 20 as the initial weight; S315, closing all valves in the powder feeding system 100.

[0377] In step S311, introducing an inert gas into the storage tank 20 to displace the air in the storage tank 20 can fill the storage tank 20 with the inert gas. When the glove box 10 drops powder into the storage tank 20, it can reduce the contact between the powder and water vapor or oxygen in the air, reduce the generation of dangerous gases, reduce the risk of accidents in the storage tank 20, and reduce the risk of changes in the properties of the powder in the storage tank 20. Among them, the inert gas can be nitrogen.

[0378] Since the first feed pipe 23 and the first discharge pipe 13 are inserted and can slide relatively up and down, and a telescopic first sleeve 61 is sleeved outside the first connection position of the first feed pipe 23 and the first discharge pipe 13, and the first sleeve 61 is located between the first feed valve 24 and the first discharge valve 14. To reduce the influence of the pulling force at the connection position of the first feed pipe 23 and the first discharge pipe 13 on the weighing of the storage tank 20, when weighing the storage tank 20, the first sleeve 61 can be connected to the storage tank 20 and under the same pressure condition, so as to minimize the influence of the connection position on the weighing accuracy of the storage tank 20.

[0379] Since the second feed pipe 41 and the second discharge pipe 31 are inserted and can slide relatively up and down, and a telescopic second sleeve 62 is sleeved outside the second connection position of the second feed pipe 41 and the second discharge pipe 31, and the second sleeve 62 is located between the second feed valve 42 and the second discharge valve 32. To reduce the influence of the pulling force at the connection position of the second feed pipe 41 and the second discharge pipe 31 on the weighing of the storage tank 20, when weighing the storage tank 20, the second sleeve 62 and the storage tank 20 can be connected and under the same pressure condition, so as to minimize the influence of the connection position on the weighing accuracy of the storage tank 20.

[0380] Therefore, when weighing the storage tank 20, closing the first discharge valve 14 of the glove box 10, opening the first feed valve 24 of the storage tank 20, closing the second feed valve 42 of the sending tank 40, and opening the second discharge valve 32 of the storage tank 20 can reduce the influence of the first sleeve 61 at the first connection position and the second sleeve 62 at the second connection position on the weighing of the storage tank 20 and improve the weighing accuracy of the storage tank 20.

[0381] In the above technical solution, by replacing the air in the storage tank 20 with an inert gas, the contact between the powder material and water vapor or oxygen in the air can be reduced, the generation of dangerous gases can be reduced, and the risk of change in the performance of the powder material in the storage tank 20 can be lowered. Meanwhile, before weighing the storage tank 20, the first discharge valve 14 of the glove box 10 is closed, and the first feed valve 24 of the storage tank 20 is opened, which can reduce the influence of the pulling force generated by the first connection position of the first feed pipe 23 and the first discharge pipe 13 on the storage tank 20 and improve the weighing accuracy of the storage tank 20.

[0382] In some embodiments of the present application, step S33 includes: S331, confirming that the blanking from the glove box 10 to the storage tank 20 is completed; S332, closing the first discharge valve 14 of the glove box 10; S333, adjusting the air pressure in the storage tank 20 to the preset weighing pressure; S334, obtaining the current weight of the storage tank 20 as the first weight; S335, closing the first feed valve 24 of the storage tank 20.

[0383] In the above technical solution, it is possible to obtain the current weight of the storage tank 20 again under the condition of the preset weighing pressure, and reduce the influence of the glove box 10 on the weighing of the storage tank 20.

[0384] In some embodiments of the present application, step S34 includes: S341, adjusting the pressure in the sending tank 40 to the preset weighing pressure; S342, opening the second feed valve 42 of the sending tank 40; S343, opening the second discharge valve 32 of the storage tank 20; S344, controlling the screw feeder 30 to feed material to the sending tank 40.

[0385] In this embodiment, adjusting the pressure of the sending tank 40 to the preset weighing pressure can make the pressure in the sending tank 40 consistent with the pressure in the storage tank 20, which is beneficial to transporting the powder material in the storage tank 20 into the sending tank 40, reducing the conveying resistance, and improving the conveying stability and efficiency.

[0386] The specific process of step S344 for controlling the screw feeder 30 to feed material to the sending tank 40 can refer to the aforementioned step S12. That is, step S344 can include: S121, controlling the screw feeder 30 to rotate at the first speed to convey the powder material; S122, confirming that the weight of the conveyed powder material reaches the first preset weight, and the first preset weight is less than the first target weight; S123, controlling the screw feeder 30 to rotate at the second speed to convey the powder material, and the second speed is less than the first speed; S124, introducing gas into the storage tank 20 to purge the storage tank 20 and the screw feeder 30; S125, confirming that the weight of the conveyed powder material reaches the first target weight.

[0387] In the above technical solution, adjusting the pressure of the sending tank 40 to the preset weighing pressure can make the pressure in the sending tank 40 consistent with the pressure in the temporary storage tank 20, which is beneficial to the powder in the temporary storage tank 20 being transported into the sending tank 40, reducing the conveying resistance and improving the conveying stability and efficiency.

[0388] In some embodiments of the present application, step S35 includes: S351, driving the second inner lining of the temporary storage tank 20 to vibrate, purging the temporary storage tank 20, and confirming that the current weight of the temporary storage tank 20 is less than or equal to the initial weight; S352, confirming that the current weight of the temporary storage tank 20 remains unchanged for the first period of time; S353, closing the second feed valve 42 of the sending tank 40 and opening the first feed valve 24 of the temporary storage tank 20; S354, adjusting the air pressure in the temporary storage tank 20 to the preset weighing pressure; S355, obtaining the current weight of the temporary storage tank 20 as the second weight.

[0389] In step S351, driving the second inner lining of the temporary storage tank 20 to vibrate includes: S3511, introducing gas into the second gap space and lasting for the third preset time; S3512, sucking the gas in the second gap space and lasting for the fourth preset time; S3513, repeating S3511 and S3512.

[0390] Among them, the third preset time can be 2s - 10s. For example, the third preset time can be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The pressure of the gas introduced into the second gap space can be the third preset pressure, and the third preset pressure can be 3kPa - 15kPa. For example, the third preset pressure can be 3kPa, 4kPa, 5kPa, 6kPa, 7kPa, 8kPa, 9kPa, 10kPa, 11kPa, 12kPa, 13kPa or 14kPa, etc.

[0391] In some examples, the gas in the second gap space can be sucked at the fourth preset pressure and last for the fourth preset time. The fourth preset time can be 2s - 10s. For example, the fourth preset time can be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The fourth preset pressure can be -3kPa to -15kPa. For example, the fourth preset pressure can be -3kPa, -4kPa, -5kPa, -6kPa, -7kPa, -8kPa, -9kPa, -10kPa, -11kPa, -12kPa, -13kPa or -14kPa, etc.

[0392] Among them, the ventilation into the second gap space can be controlled or stopped by opening and closing a second intake valve on a third pipeline connected in series between the second fan and the second gap space. Whether to evacuate the second gap space can be controlled by opening and closing a second vacuum valve on a fourth pipeline connected in series between the second vacuum pump and the second gap space.

[0393] The purge storage tank 20 can include: controlling the start of a second dust removal fan connected to the storage tank 20, opening a second dust removal valve 522 on a second air pipe 521 connected in series between the second dust removal fan and the storage tank 20, and introducing compressed nitrogen with a certain pressure into the storage tank 20, so that the residual powder on the inner walls of the storage tank 20 and the screw feeder 30 can flow towards the sending tank 40 under the drive of the dust removal gas, to ensure that the powder in the storage tank 20 and the screw feeder 30 can completely enter the sending tank 40.

[0394] In some examples, it is confirmed that the current weight of the storage tank 20 remains unchanged for a first period of time. Among them, the first period of time can be 15s - 50s. For example, the first period of time can be 15s, 20s, 25s, 30s, 35s, 40s, 45s or 50s, etc.

[0395] In step S353, when weighing the storage tank 20, the first discharge valve 14 of the glove box 10 is closed, the first feed valve 24 of the storage tank 20 is opened, the second feed valve 42 of the sending tank 40 is closed, and the second discharge valve 32 of the storage tank 20 is opened. Thus, the influence of the pulling force at the first connection position of the first feed pipe 23 and the first discharge pipe 13 and the second connection position of the second feed pipe 41 and the second discharge pipe 31 on the weighing of the storage tank 20 can be reduced, and the weighing accuracy of the storage tank 20 can be improved.

[0396] In the above technical solution, by vibrating and purging the storage tank 20, the residual powder in the storage tank 20 can be reduced. When weighing the storage tank 20, opening the first feed valve 24 and the second discharge valve 32 and closing the first discharge valve 14 and the second feed valve 42 can reduce the influence of the pulling force at the first connection position of the first feed pipe 23 and the first discharge pipe 13 and the second connection position of the second feed pipe 41 and the second discharge pipe 31 on the weighing of the storage tank 20, and improve the weighing accuracy of the storage tank 20.

[0397] In some embodiments of the present application, step S36 includes: comparing the second weight with the initial weight. When the difference between the second weight and the initial weight is within a preset range, then S37 is executed. When the difference between the second weight and the initial weight exceeds the preset range, the first feed valve 24 of the storage tank 20 is closed, the second feed valve 42 of the sending tank 40 is opened, and then step S35 is executed again.

[0398] In some embodiments, the preset range of the difference between the second weight and the initial weight can be determined according to the total weight of the powder conveyed. For example, the preset range can be ±1% of the total weight of the powder to be conveyed. In some other examples, the preset range of the difference can be a definite numerical range. For example, the preset range can be ±50 g.

[0399] When the difference between the second weight and the initial weight exceeds the preset range, it indicates that there is still some powder not put into the sending tank 40, and the process of putting the powder into the sending tank 40 this time is not completed yet. There is still a relatively large amount of powder remaining in the temporary storage tank 20 and / or the screw feeder. At this time, it is necessary to shake and clean the temporary storage tank 20 and the screw feeder again and purge the dust.

[0400] In the above technical solution, it can be accurately determined whether the powder falling from the glove box 10 into the temporary storage tank 20 is completely conveyed into the sending tank 40, reducing the adhesion amount of the powder in the temporary storage tank 20 and reducing the powder loss.

[0401] Next, reference will be made to Figures 1-5 Describe the production system 1000 according to a specific embodiment of the present application.

[0402] Refer to Figure 1 In this embodiment, the production system 1000 is a battery production system 1000. The production system 1000 includes a powder feeding system 100 and a slurry preparation system 800. The slurry preparation system 800 is connected downstream of the powder feeding system 100. The slurry preparation system 800 is used to prepare the slurry for coating the electrode sheet, and the powder feeding system 100 is used to convey the powdered raw materials required for preparing the slurry to the slurry preparation system 800.

[0403] Specifically, as Figure 1 shown, the powder feeding system 100 includes a glove box 10, a temporary storage tank 20, a screw feeder 30, and a sending tank 40 arranged in sequence from top to bottom. The bottom of the glove box 10 is connected with a first discharge pipe 13 extending downward. A first discharge valve 14 is connected in series on the first discharge pipe 13. The top of the temporary storage tank 20 is connected with a first feed pipe 23 extending upward. A first feed valve 24 is connected in series on the first feed pipe 23. The first feed pipe 23 is inserted into the first discharge pipe 13, and a first sleeve 61 is sleeved outside the insertion position. The first sleeve 61 is a bellows that can be telescoped up and down.

[0404] The outlet of the temporary storage tank 20 is connected to the inlet of the screw feeder 30. The outlet of the screw feeder 30 is connected with a second discharge pipe 31 extending downward. A second discharge valve 32 is connected in series on the second discharge pipe 31. The top of the sending tank 40 is connected with a second feed pipe 41 extending upward. A second feed valve 42 is connected in series on the second feed pipe 41. The second feed pipe 41 is inserted into the second discharge pipe 31, and a second sleeve 62 is sleeved outside the insertion position. The second sleeve 62 is a bellows that can be telescoped up and down.

[0405] The powder feeding system 100 further includes a dust removal device, which includes: a dust removal fan 50, a first air pipe 511, a second air pipe 521, and a third air pipe 531. The first air pipe 511 is connected between the dust removal fan 50 and the first storage chamber 101 of the glove box 10. A first dust removal valve 512 is connected in series on the first air pipe 511. The second air pipe 521 is connected between the dust removal fan 50 and the second storage chamber 201 of the temporary storage tank 20. A second dust removal valve 522 is connected in series on the second air pipe 521. The third air pipe 531 is connected between the dust removal fan 50 and the third storage chamber 401 of the sending tank 40. A third dust removal valve 532 is connected in series on the third air pipe 531. The third dust removal valve 532 can be a pneumatic butterfly valve.

[0406] The glove box 10 includes a box body 11 and a first inner lining 12. The first inner lining 12 is a fluororubber part and is arranged inside the box body 11, and defines a first storage chamber 101. A first gap space 102 is formed between the first inner lining 12 and the box body 11. The powder feeding system 100 further includes a first fan and a first vacuum pump. The first fan is communicated with the first gap space 102 through a first pipeline. A first air inlet valve is connected in series on the first pipeline. The first vacuum pump is communicated with the first gap space 102 through a second pipeline. A first vacuum valve is connected in series on the second pipeline.

[0407] The temporary storage tank 20 includes a tank body and a second inner lining. The second inner lining is a fluororubber part and is arranged inside the tank body, and defines a second storage chamber 201. A second gap space is formed between the second inner lining and the tank body. The powder feeding system 100 further includes a second fan and a second vacuum pump. The second fan is communicated with the second gap space through a third pipeline. A second air inlet valve is connected in series on the third pipeline. The second vacuum pump is communicated with the second gap space through a fourth pipeline. A second vacuum valve is connected in series on the fourth pipeline.

[0408] An exciter for driving the sending tank 40 to vibrate is provided on the sending tank 40. Among them, pressure sensors for detecting pressure and weighing sensors for weighing are provided on both the glove box 10, the temporary storage tank 20, and the sending tank 40.

[0409] The pulping system 800 includes a plurality of pulping tanks 80, and the inlets of the plurality of pulping tanks 80 are all connected to the outlet of the sending tank 40.

[0410] The following refers to Figure 9 and in combination with Figures 6-8 Describe the overall working process of the production system 1000 of this embodiment. Figure 9 It is a feeding flow chart of the powder feeding system 100 according to an embodiment of the present application. [[ID=************]] [[ID=************]]

[0411] The bagged powder is transported to the material placement area of the glove box 10. The equipment code, asset number, and powder packaging PN code are verified through a barcode scanner. After the three-code combination verification is correct, the electronic lock of the glove box 10 is opened. The operator manually opens the door of the glove box 10, places the material, closes the door of the glove box 10, and unpacks the material through the gloves in the glove box 10. After unpacking, the packaging is transferred to the waste bag box. Then, the operator operates the external control system to start the glove box 10 to discharge materials into the temporary storage tank 20.

[0412] After the glove box 10 finishes discharging materials into the temporary storage tank 20, the shaking function of the first inner lining 12 of the glove box 10 is started, so that the powder sticking to the wall falls into the temporary storage tank 20. After 20 seconds, the blowing function of the glove box 10 is started until the weight of the temporary storage tank 20 meets the requirements.

[0413] Open the second discharge valve 32 and the second feed valve 42, and use the screw feeder to transport the powder in the temporary storage tank 20 to the sending tank 40 to achieve precise batching. Specifically, first, the screw feeder 30 rotates at a high speed to quickly batch the materials; when the remaining powder weight is less than a certain set value, the screw feeder 30 reduces its speed to achieve precise batching; then, compressed nitrogen is introduced to purge the temporary storage tank 20 and the screw feeder 30, so that the residual powder on the walls of the temporary storage tank 20, the screw feeder 30, and the pipe wall is purged into the sending tank 40, achieving the functions of pipe cleaning and precise weighing. Until the weighing sensor of the temporary storage tank 20 continuously detects that the weight in the tank is within the reasonable error range of the set weight, the batching action of the temporary storage tank 20 to the sending tank 40 is completed.

[0414] After the powder feeding system 100 and the pulping system 800 judge through signal interaction and confirm that feeding is required, the sending tank 40 is vibrated, and compressed nitrogen is used as the energy source to premix the powder in the sending tank 40 with nitrogen and transport it to the pulping tank 80 of the pulping system 800 through positive pressure. The powder in the sending tank 40 can also fall into the pulping tank 80 by gravity. Among them, a conveying leakage detection and collection system is configured on the positive pressure powder conveying pipeline between the sending tank 40 and the pulping tank 80 to monitor the leakage of powder and nitrogen in real time.

[0415] In addition, before opening the glove box 10 to put the bagged powder into the glove box 10, the overall working process of the production system 1000 further includes:

[0416] Adjust the pressure in the temporary storage tank 20 to make the pressure in the temporary storage tank 20 balanced, then zero the weight of the temporary storage tank 20, and then inertize the glove box 10, the temporary storage tank 20, and the sending tank 40.

[0417] When adjusting the pressure in the buffer tank 20 to balance the pressure in the buffer tank 20, the second dust removal valve 522 connected between the buffer tank 20 and the second dust removal fan can be opened first, and the first feed valve 24 of the buffer tank 20 can be opened. After waiting for 5 s, the first feed valve 24 of the buffer tank 20 can be closed. The second discharge valve 32 of the buffer tank 20 can be opened at the 6th second, and then the second discharge valve 32 of the buffer tank 20 can be closed after a delay of 5 s. At this time, the pressure in the buffer tank 20 does not increase. After waiting for 5 s to stabilize, that is, the pressure of the buffer tank 20 reaches balance.

[0418] After the feeding of the buffer tank 20 into the sending tank 40 is completed, the overall working process of the production system 1000 further includes: supplementing nitrogen into the buffer tank 20 to maintain pressure.

[0419] In the above embodiment, by using the glove box 10 to unbag and drop the powder under a closed state, low-humidity compressed air is introduced into the glove box 10 during the unpacking process to prevent the reaction with the powder to generate hydrogen sulfide. After the glove box 10 finishes dropping the material, the function of shaking the inner wall of the glove box 10 and the function of purging and dust removal are automatically started, and the dropping error is controlled within ±50 g through program control. At the same time, both the glove box 10 and the buffer tank 20 are provided with a shakeable inner lining, and the inner lining is made of a non-metallic flexible material, and the inner lining can deform in opposite directions under the action of the fan and the vacuum pump to shake off the powder on the inner wall of the inner lining.

[0420] In the above embodiment, the outlet of the buffer tank 20 is equipped with a screw feeder 30, which can realize automatic batching and weighing, achieve highly automated batching of materials, abandon the previous manual weighing and then fixed-packaging feeding, can more quickly achieve mass production, effectively prevent mistakes, and can also avoid the harm caused by sulfides to health during manual weighing.

[0421] In the above embodiment, the feed pipe and the discharge pipe are nested and butted by straight pipes, and the first sleeve 61 or the second sleeve 62 is sleeved outside, which can not only prevent the feed pipe and the discharge pipe from shaking to generate particles, but also inflate into the first sleeve 61 or the second sleeve 62 during material dropping, reduce the risk of dust and waste gas leakage, and the powder will not rub against the first sleeve 61 and the second sleeve 62, so the thickness of the first sleeve 61 and the second sleeve 62 can be greatly reduced.

[0422] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A powder feeding system, characterized in that: include: A glove box (10), wherein a first discharge pipe (13) is provided at the bottom of the glove box (10); A temporary storage tank (20), the inlet of the temporary storage tank (20) is connected to the outlet of the glove box (10), and a first feed pipe (23) connected to the first discharge pipe (13) is provided on the top of the temporary storage tank (20), the first feed pipe (23) and the first discharge pipe (13) can slide relative to each other in the up and down directions and are plugged into each other, and a first gap channel is formed at the plugging position of the first feed pipe (23) and the first discharge pipe (13); The powder feeding system (100) is configured to: enable the powder in the glove box (10) to fall into the temporary storage tank (20) under the action of gravity; a first sleeve (61), the first sleeve (61) being sleeved on the outside of the first feed pipe (23) and the first discharge pipe (13), the upper end of the first sleeve (61) being fixed and sealed to the first discharge pipe (13), the lower end of the first sleeve (61) being fixed and sealed to the first feed pipe (23), and the first sleeve (61) being configured to be retractable in an up-down direction; The inner space of the first sleeve is connected to the inner space of the first feed pipe (23) and the first discharge pipe (13) through the first gap channel; The first sleeve (61) cooperates with the first feed pipe (23) and the first discharge pipe (13) to define a first inflation chamber (611), the first inflation chamber (611) being in communication with the first feed pipe (23) and the first discharge pipe (13), and the first sleeve (61) is formed with a first inflation port in communication with the first inflation chamber (611), the first inflation port being configured to be in communication with an air source; The powder feeding system (100) is configured to: when the powder is discharged from the glove box (10) into the temporary storage tank (20), gas is introduced into the first inflation cavity (611) through the first inflation port; a first weighing device, the first weighing device being used to detect the weight of the temporary storage tank (20); A screw feeder (30) and a sending tank (40), wherein the screw feeder (30) is connected between the outlet of the temporary storage tank (20) and the inlet of the sending tank (40) and is used to transport the powder in the temporary storage tank (20) to the sending tank (40), and the outlet of the sending tank (40) is suitable for being connected to a pulping system (800). The powder feeding system is configured to measure the weight of the powder transported by the screw feeder (30) to the sending tank (40).

2. The powder feeding system according to claim 1, characterized in that: The glove box (10) comprises: a box body (11) and a first liner (12), wherein the first liner (12) is arranged in the box body (11), and the inner side of the first liner (12) defines a first storage chamber (101) of the glove box (10).

3. The powder feeding system according to claim 2, characterized in that: The powder material feeding system (100) further includes: a first vibration driving device, wherein the first vibration driving device is used to drive the first liner (12) to vibrate.

4. The powder feeding system according to claim 3, characterized in that: The first lining (12) is an elastic member, and a first gap space (102) is formed between the box body (11) and the first lining (12). The first vibration driving device includes a first ventilation pipe and a first airflow driving mechanism, one end of the first ventilation pipe is connected to the first airflow driving mechanism and the other end is connected to the first gap space (102), and the first airflow driving mechanism blows gas into the first gap space (102) and extracts gas from the first gap space (102) through the first ventilation pipe.

5. The powder feeding system according to claim 4, characterized in that: The box body (11) is formed with a first air inlet and a first air outlet which are arranged at intervals and communicate with the first gap space (102). The first airflow driving mechanism includes: a first fan and a first vacuum pump, the outlet of the first fan is connected to the first air inlet, and the inlet of the first vacuum pump is connected to the first air outlet.

6. The powder feeding system according to claim 5, characterized in that: The first blower and the first vacuum pump are configured to operate alternately to cause the first liner (12) to vibrate.

7. The powder feeding system according to claim 2, characterized in that: The first lining (12) is a non-metallic part.

8. The powder feeding system according to claim 7, characterized in that: The first lining (12) is a fluororubber part.

9. The powder feeding system according to claim 1, characterized in that: The powder feeding system (100) further includes: a first purging device, the first purging device including: a first air pipe (511) and a first dust removal valve (512) connected in series to the first air pipe (511), one end of the first air pipe (511) extending into the first storage chamber (101) of the glove box (10) for purging powder on the inner wall of the first storage chamber (101).

10. The powder feeding system according to claim 9, characterized in that: The first dust removal valve (512) is arranged outside the glove box (10).

11. The powder feeding system according to claim 10, characterized in that: The first dust removal valve (512) is formed as a foot valve.

12. The powder feeding system according to claim 9, characterized in that: The powder feeding system (100) further comprises: a first detection device, the first detection device being used to detect the air pressure in the first storage chamber (101), and the first detection device being communicatively connected to the first purge device.

13. The powder feeding system according to any one of claims 1 to 12, characterized in that: The temporary storage tank (20) comprises a tank body and a second lining, wherein the second lining is arranged in the tank body, and the inner side of the second lining defines a second material storage cavity (201) of the temporary storage tank (20).

14. The powder feeding system according to claim 13, characterized in that: The powder material feeding system (100) further comprises: a second vibration driving device, the second vibration driving device being used to drive the second liner to vibrate.

15. The powder feeding system according to claim 13, characterized in that: The powder feeding system (100) further includes: a second purging device, the second purging device including: a second air pipe (521) and a second dust removal valve (522) connected in series to the second air pipe (521), the second air pipe (521) being in communication with the second storage chamber (201) of the temporary storage tank (20) and being used for conveying gas to the second storage chamber (201) to purge the powder on the inner wall of the second storage chamber (201).

16. The powder feeding system according to claim 1, characterized in that: The powder feeding system (100) further includes: a third purging device, the third purging device including: a third air pipe (531) and a third dust removal valve (532) connected in series to the third air pipe (531), the third air pipe (531) being in communication with the third storage chamber (401) of the sending tank (40) and being used for delivering gas to the third storage chamber (401) to purge the powder on the inner wall of the third storage chamber (401).

17. The powder feeding system according to claim 1, characterized in that: The first discharge pipe (13) is connected in series with a first discharge valve (14), and the first feed pipe (23) is connected in series with a first feed valve (24).

18. The powder feeding system according to claim 1, characterized in that: The first sleeve (61) is a bellows.

19. The powder feeding system according to claim 1, characterized in that: The first sleeve (61) is a rubber piece.

20. The powder feeding system according to claim 18, characterized in that: The wall thickness of the first sleeve (61) is less than or equal to 2 mm.

21. The powder feeding system according to claim 1, characterized in that: The ratio of the overlapping length of the first feed pipe (23) and the first discharge pipe (13) in the vertical direction to the diameter of the first feed pipe (23) or the first discharge pipe (13) is greater than or equal to 1 and less than or equal to 1.

5.

22. The powder feeding system according to claim 1, characterized in that: The outlet of the screw feeder (30) is connected to a second discharge pipe (31) extending downward, and a second discharge valve (32) is connected in series to the second discharge pipe (31). The top of the sending tank (40) is provided with a second feed pipe (41) connected to the second discharge pipe (31), and a second feed valve (42) is connected in series to the second feed pipe (41). The powder feeding system (100) is configured to allow the powder at the outlet of the screw feeder (30) to fall into the sending tank (40) under the action of gravity.

23. The powder feeding system according to claim 22, characterized in that: The second feed pipe (41) and the second discharge pipe (31) are relatively slidable in the up and down directions and are plug-connected.

24. The powder feeding system according to claim 23, characterized in that: The powder feeding system (100) further includes: a second sleeve (62), the second sleeve (62) being sleeved on the outside of the second feed pipe (41) and the second discharge pipe (31), the upper end of the second sleeve (62) being fixed and sealed to the second discharge pipe (31), the lower end of the second sleeve (62) being fixed and sealed to the second feed pipe (41), and the second sleeve (62) being retractable in the up and down directions. The second sleeve (62) cooperates with the second feed pipe (41) and the second discharge pipe (31) to define a second inflation chamber (621), and the second inflation chamber (621) is communicated with the second feed pipe (41) and the second discharge pipe (31). A second inflation port is formed on the second sleeve (62) and is communicated with the second inflation chamber (621), and the second inflation port is configured to be communicated with an air source.

25. A production system, characterized in that: include: The powder feeding system (100) according to any one of claims 1 to 24; A pulping system (800) includes a pulping tank (80), wherein the outlet of the sending tank (40) is connected to the powder inlet of the pulping tank (80).

26. The production system according to claim 25, characterized in that There are multiple pulping tanks (80), and the powder inlets of the multiple pulping tanks (80) are all connected to the outlet of the sending tank (40).

27. A method for controlling a powder feeding system, characterized in that: The powder feeding system (100) is a powder feeding system (100) according to any one of claims 1 to 24, and the control method comprises: S11, confirming receipt of a batching instruction for delivering powder to the sending tank (40); S12, controlling the screw feeder (30) to deliver powder of a first target weight from the temporary storage tank (20) to the sending tank (40).

28. The control method of the powder feeding system according to claim 27, characterized in that: Step S12 includes: S121, controlling the screw feeder (30) to rotate at a first speed to convey the powder; S122, confirming that the weight of the delivered powder reaches a first preset weight, and the first preset weight is less than the first target weight; S123, controlling the screw feeder (30) to rotate at a second speed to convey the powder, wherein the second speed is less than the first speed.

29. The control method of the powder feeding system according to claim 27, characterized in that: After S123, the control method further includes: S124, introducing gas into the temporary storage tank (20) to purge the temporary storage tank (20) and the screw feeder (30); S125, confirming that the weight of the delivered powder reaches the first target weight.

30. The control method of the powder feeding system according to claim 29, characterized in that: After step S12, the control method further includes: S13, confirming receipt of a feeding instruction to feed the pulping system (800); S14, driving the sending tank (40) to vibrate, and introducing a conveying gas into the sending tank (40) to convey the powder in the sending tank (40) to the pulping system (800).

31. A method for controlling a powder feeding system, characterized in that: The powder feeding system (100) is a powder feeding system (100) according to any one of claims 1 to 24, the glove box (10) comprises a box body (11) and a first liner (12) provided in the box body (11), and the control method comprises: S21, confirming that the glove box (10) has completed the discharge of materials into the temporary storage tank (20); S22, driving the first lining (12) to vibrate; S23, purging the inner wall of the glove box (10).

32. The control method of the powder feeding system according to claim 31, characterized in that: A first gap space (102) is formed between the box body (11) and the first lining (12), and step S22 includes: S221, introducing gas into the first gap space (102) for a first preset time; S222, sucking the gas in the first gap space (102) for a second preset time; S223, detecting whether the weight of the powder dropped from the glove box (10) into the temporary storage tank (20) reaches a second target weight, If yes, the blanking is completed; if no, execute S221.

33. The control method of the powder feeding system according to claim 32, characterized in that: In step S223, when the weight of the powder falling into the temporary storage tank (20) does not reach the second target weight, the control method further includes: Determine whether the total running time of step S22 is greater than the third preset time, If not, execute S221, and if so, issue a blanking timeout alarm message.

34. The control method of the powder feeding system according to claim 31, characterized in that: Step S23 includes: S231, detecting and confirming that the pressure in the glove box (10) is less than a first preset pressure; S232, introducing a purge gas into the glove box (10); S233, confirming that the pressure in the glove box (10) is greater than the first preset pressure and lasts for a first time; S234, stopping the introduction of the purge gas into the glove box (10); S235, detecting and judging whether the pressure in the glove box (10) is less than a second preset pressure, the second preset pressure being less than the first preset pressure; if so, ending the purge; if not, executing S232.

35. The control method of the powder feeding system according to claim 34, characterized in that: Step S231 includes: S2311, detecting the pressure in the glove box (10), S2312, comparing the detected pressure of the glove box (10) with the first preset pressure and the third preset pressure, the third preset pressure being smaller than the second preset pressure and the first preset pressure, If the pressure in the glove box (10) is less than the third preset pressure, execute S2313, If the pressure in the glove box (10) is greater than the third preset pressure and less than the first preset pressure, executing S232; S2313, turning off the first dust removal fan connected to the glove box (10), and opening the first dust removal valve (512) connected to the glove box (10); S2314: After detecting and confirming that the pressure in the glove box (10) is greater than the second preset pressure, execute S232.

36. A method for controlling a powder feeding system, characterized in that: The powder feeding system (100) is a powder feeding system (100) according to any one of claims 1 to 24, and the control method comprises: S31, obtaining the initial weight of the temporary storage tank (20); S32, controlling the glove box (10) to drop materials into the temporary storage tank (20); S33, obtaining the weight of the temporary storage tank (20) after the glove box (10) drops materials into the temporary storage tank (20) as a first weight; S34, controlling the temporary storage tank (20) to feed the material to the sending tank (40); S35, obtaining the weight of the temporary storage tank (20) after feeding as a second weight; S36, confirming that the difference between the second weight and the initial weight is within a preset range; S37, feeding is completed, When obtaining the weight of the temporary storage tank (20), the pressure in the temporary storage tank (20) is adjusted to a preset weighing pressure.

37. The control method of the powder feeding system according to claim 36, characterized in that: Step S31 includes: S311, introducing an inert gas into the temporary storage tank (20) to replace the air in the temporary storage tank (20); S312, closing the first discharge valve (14) of the glove box (10), opening the first feed valve (24) of the temporary storage tank (20), S313, adjusting the air pressure in the temporary storage tank (20) to the preset weighing pressure; S314, obtaining the current weight of the temporary storage tank (20) as the initial weight; S315, closing all valves in the powder material feeding system (100).

38. The control method of the powder feeding system according to claim 36, characterized in that: Step S33 includes: S331, confirming that the glove box (10) has completed the material discharge into the temporary storage tank (20); S332, closing the first discharge valve (14) of the glove box (10); S333, adjusting the air pressure in the temporary storage tank (20) to the preset weighing pressure; S334, obtaining the current weight of the temporary storage tank (20) as the first weight; S335, closing the first feed valve (24) of the temporary storage tank (20).

39. The control method of the powder feeding system according to claim 36, characterized in that: Step S34 includes: S341, adjusting the pressure in the sending tank (40) to the preset weighing pressure; S342, opening the second feed valve (42) of the sending tank (40), S343, opening the second discharge valve (32) of the temporary storage tank (20); S344, controlling the screw feeder (30) to feed the material to the sending tank (40).

40. The control method of the powder feeding system according to claim 36, characterized in that: Step S35 includes: S351, driving the second inner lining of the temporary storage tank (20) to vibrate, purging the temporary storage tank (20), and confirming that the current weight of the temporary storage tank (20) is less than or equal to the initial weight; S352, confirming that the current weight of the temporary storage tank (20) remains unchanged for the first time; S353, closing the second feed valve (42) of the sending tank (40), and opening the first feed valve (24) of the temporary storage tank (20); S354, adjusting the air pressure in the temporary storage tank (20) to a preset weighing pressure; S355, obtaining the current weight of the temporary storage tank (20) as the second weight.

41. The method for controlling a powder feeding system according to claim 36, wherein: Step S36 includes: comparing the second weight with the initial weight, When the difference between the second weight and the initial weight is within a preset range, step S37 is executed. When the difference between the second weight and the initial weight exceeds a preset range, the first feed valve (24) of the temporary storage tank (20) is closed, the second feed valve (42) of the sending tank (40) is opened, and step S35 is re-executed.

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