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

Abstract

The invention discloses a powder feeding system, a production system and a control method of the powder feeding system. The powder feeding system comprises a glove box, a feeding device and a control device, an inlet of the temporary storage tank is connected with an outlet of the glove box; the screw feeder is connected between an outlet of the temporary storage tank and an inlet of the sending tank and used for conveying the powder in the temporary storage tank into the sending tank, an outlet of the sending tank is suitable for being connected to a pulping system, and the powder feeding system is configured to be capable of metering the weight of the powder conveyed to the sending tank by the screw feeder. According to the technical scheme, the powder in the temporary storage tank can be automatically conveyed into the sending tank, the weight of the powder blended into the sending tank can be accurately measured, highly automatic blending of the powder is achieved, the blending efficiency is improved, mass production can be rapidly achieved, contact between personnel and the powder can be reduced, and harm of the powder to health is reduced.

Description

Technical Field

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

[0002] At present, in the preparation process of hazardous powders in the lithium battery industry, there is a problem of leakage of powders when bags are opened. This method is not suitable for toxic, flammable, explosive and other highly dangerous powders, such as sulfide powders. After leakage, it reacts with water in the air to produce hydrogen sulfide. Therefore, in the preparation process of solid-state battery powders, closed space metering and transportation are usually required.

[0003] In the traditional lithium battery industry, powder material feeding, metering and transportation processes are usually done manually after weighing and then feeding into fixed packages. This method is inefficient and cannot achieve large-scale mass production. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a powder feeding system, a production system including the powder feeding system, and a control method of the powder feeding system, wherein the powder feeding system can improve the degree of automation of batching and can quickly realize mass production.

[0005] In the first aspect, an embodiment of the present application provides a powder feeding system, comprising: a glove box; a temporary storage tank, the inlet of the temporary 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 temporary storage tank and the inlet of the sending tank, and is used to transport the powder in the temporary storage tank to the sending tank, the outlet of the sending tank is suitable for connecting to a pulping system, and the powder feeding system is configured to measure the weight of the powder delivered to the sending tank by the screw feeder.

[0006] In the above technical scheme, a screw feeder is arranged between the temporary storage tank and the sending tank, and the powder in the temporary storage tank is transported to the sending tank by the screw feeder, and the weight of the powder transported to the sending tank by the screw feeder can be measured. In this way, not only can the powder in the temporary storage tank be automatically transported to the sending tank, but also the weight of the powder batched to the sending tank can be accurately measured, so as to achieve highly automated batching of powder and improve batching efficiency. Compared with the batching method of manually weighing and then using fixed packaging to feed the materials, 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 powder, and reduce the harm of powder to health.

[0007] In some embodiments, the glove box includes: a box body and a first liner, wherein the first liner is disposed in the box body, and an inner side of the first liner defines a first storage cavity of the glove box.

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

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

[0010] In the above technical solution, since the first vibration driving device is provided, by driving the first liner to vibrate, the powder adsorbed or adhered to the first liner can be shaken off, thereby reducing the amount of powder residue in the glove box and reducing the impact on the health of operators.

[0011] In some embodiments, the first lining is an elastic member, and a first gap space is formed between the box body and the first lining. 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. The first airflow driving mechanism blows gas into the first gap space and extracts the gas in the first gap space through the first ventilation pipe.

[0012] In the above technical solution, since the first liner is an elastic part and cooperates with the box body to define the first gap space, the first airflow driving structure is used to extract or pump gas into the first gap space to change the pressure in the first gap space, so that the first liner can vibrate under the action of the changing pressure, further shake off the powder on the first liner, and further reduce the impact of residual powder in the glove box on the health of operators.

[0013] In some embodiments, a first air inlet and a first air outlet are formed on the box body, which are arranged at intervals and connected to the first gap space. 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.

[0014] In the above technical solution, since the first fan and the first vacuum pump connected to the first gap space are respectively provided, it is convenient to input and extract gas into and from the first gap space. The structure is simple and the control is convenient. The shaking of the first lining can be achieved conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the first lining.

[0015] In some embodiments, the first blower and the first vacuum pump are configured to operate alternately to flutter the first liner.

[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 liner can be achieved conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the first liner.

[0017] In some embodiments, the first liner is a non-metallic member.

[0018] In the above technical solution, since the first lining is a non-metallic part, the probability of the first lining generating electrostatic adsorption of powder can be reduced, and the risk of metal particles generated by friction between the first lining and the powder and causing the metal particles to enter the powder can also be reduced. When the powder feeding system is used in a battery production system, the battery performance can be guaranteed.

[0019] In some embodiments, the first liner is a fluororubber member.

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

[0021] In some embodiments, the powder feeding system also includes: a first purge device, the first purge device includes: a first air pipe and a first dust removal valve connected in series to the first air pipe, one end of the first air pipe extends into the first storage chamber of the glove box, and is used to purge the powder on the inner wall of the first storage chamber.

[0022] In the above technical solution, since the first purge device is provided to purge the powder on the inner wall of the first storage chamber, the probability of powder adhering to the glove box can be reduced, the service life of the glove box can be improved, the waste of powder can be reduced, and the risk of powder contacting operators 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 on the outside of 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 purge device, thereby improving operational convenience and facilitating the inspection and maintenance of the first dust removal valve. The first dust removal valve also does not occupy space in the glove box, thereby improving space utilization in 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 needs to be actively stepped on to operate, 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. In addition, by adjusting the pedaling force and stroke, the gas flow 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 material 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 material 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 material 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, wherein the second liner is disposed within the tank body, and the inner side of the second liner defines a second material storage chamber 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 the 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 increasing 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, by driving the second lining to vibrate, the powder adsorbed or adhered to the second lining can be shaken off, 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 also includes: a third purge device, the third purge device includes: a third air pipe and a third dust removal valve connected in series to the third air pipe, the third air pipe is connected to the third storage chamber of the sending tank, and is used to transport gas to the third storage chamber to purge the powder on the inner wall of the third storage chamber.

[0036] In the above technical scheme, by setting up a third purge device for purging the powder on the inner wall of the third storage chamber, the probability of powder adhering to the sending tank can be reduced, the service life of the sending tank can be improved, the waste of powder can be reduced, and the risk of powder contacting operators can be reduced. The third purge device can also be used as an energy source to transport the powder in the sending tank to the pulping system, thereby improving the transportation efficiency.

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

[0038] In the above technical solution, by setting up a 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, so as to provide a stable and accurate supply of powder to the downstream process, improve production consistency and product quality, but also the degree of automation of the production process can be improved, manual intervention can be reduced, and production efficiency can be improved.

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

[0040] In the above technical solution, gravity is used to allow the powder in the glove box to fall directly into the temporary storage tank, and no additional power equipment is needed to drive the transmission. This can reduce equipment costs, reduce energy consumption, simplify the powder transmission process, and improve transmission efficiency. The powder can be quickly and smoothly transferred from the glove box to the temporary storage tank. By setting a first feed valve and a first discharge valve, the powder can fall into the temporary storage tank at a predetermined time, predetermined amount, and predetermined speed according to process requirements, thereby improving the degree of automation 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 up and down directions and are plug-connected.

[0042] In the above technical scheme, since the first feed pipe and the first discharge pipe can slide and be plugged in the up and down directions, not only can the assembly error between the first feed pipe and the first discharge pipe be reduced, but also the influence of the mutual pulling between the first feed pipe and the first discharge pipe on the weighing sensor of the glove box or the temporary storage tank during detection can be reduced, thereby improving the detection accuracy of the weighing sensor, providing stable and accurate powder supply for the subsequent processes of the powder feeding system, and ensuring production consistency and product quality.

[0043] In some embodiments, the powder feeding system also includes: a first sleeve, the first sleeve is sleeved on the outside of the first feed pipe and the first discharge pipe, the upper end of the first sleeve is fixed and sealed to the first discharge pipe, the lower end of the first sleeve is fixed and sealed to the first feed pipe, and the first sleeve is configured to be retractable in the up and down directions.

[0044] In the above technical solution, by arranging the first sleeve to be sleeved on the outside of the first feed pipe and the first discharge pipe, the first sleeve can be used to seal the connection position between the first feed pipe and the first discharge pipe, thereby reducing the probability of leakage at the connection position between the first feed pipe and the first discharge pipe, thereby ensuring the sealing performance of the connection position under the premise of achieving relative upward and downward sliding of the first feed pipe and the first discharge pipe.

[0045] In some embodiments, the first sleeve cooperates with the first feed pipe and the first discharge pipe to define a first inflation chamber, the first inflation chamber is connected to the first feed pipe and the first discharge pipe, and a first inflation port connected to the first inflation chamber is formed on the first sleeve, and the first inflation port is configured to be connected to an air source.

[0046] In the above technical solution, since a first inflation port connected to an air source is formed on the first sleeve, air is inflated into the first inflation cavity through the first inflation port, thereby reducing the probability of powder leakage from the gap between the first feed pipe and the first discharge pipe, and improving the sealing performance between the first feed pipe and the first discharge pipe.

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

[0048] In the above technical solution, since the first sleeve is a bellows, it can not only make the first sleeve retractable in the up and down directions to adapt to the relative displacement between the first feed pipe and the first discharge pipe, but also has better sealing performance to reduce the risk of leakage at the connection position, and the bellows has a simple structure and is easy to install.

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

[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, so that the first sleeve can have 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, it can not only reduce the material consumption of the first sleeve and reduce the weight of the first sleeve, but also reduce the pulling force of the first sleeve between the first feed pipe and the first discharge pipe, thereby improving the detection accuracy of the weighing sensor.

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

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

[0055] In some embodiments, the ratio of the overlap length of the first feed pipe and the first discharge pipe in the up-down direction to 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 long enough to reduce the risk of the first feed pipe and the first discharge pipe being separated in the up and down directions, thereby improving the connection reliability between the first feed pipe and the first discharge pipe.

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

[0058] In the above technical scheme, by utilizing gravity to allow the powder in the screw feeder to fall directly into the sending tank, no additional power equipment is required to drive the transmission, which can reduce equipment costs, reduce energy consumption, simplify the powder transmission process, and improve transmission efficiency. The powder can be quickly and smoothly transferred from the screw feeder to the sending tank. By setting a second feed valve and a second discharge valve, the powder can fall into the sending tank at a predetermined time, predetermined amount, and predetermined speed according to process requirements, thereby improving the degree of automation of the production process and meeting the process requirements of feeding.

[0059] In some embodiments, the second feed pipe and the second discharge pipe can slide relative to each other in the up and down directions and are plug-connected.

[0060] In the above technical scheme, since the second feed pipe and the second discharge pipe can slide and be plugged in the up and down directions, not only can the assembly error between the second feed pipe and the second discharge pipe be reduced, but also the influence of the mutual pulling between the second feed pipe and the second discharge pipe on the weighing sensor of the sending tank during detection can be reduced, thereby improving the detection accuracy of the weighing sensor, providing stable and accurate powder supply for the subsequent processes of the powder feeding system, and ensuring production consistency and product quality.

[0061] In some embodiments, the powder feeding system also includes: a second sleeve, the second sleeve is sleeved on the outside of the second feed pipe and the second discharge pipe, the upper end of the second sleeve is fixed and sealed to the second discharge pipe, the lower end of the second sleeve is fixed and sealed to the second feed pipe, and the second sleeve is retractable in the up and down directions, the second sleeve cooperates with the second feed pipe and the second discharge pipe to define a second inflation chamber, the second inflation chamber is connected with the second feed pipe and the second discharge pipe, and a second inflation port connected to the second inflation chamber is formed on the second sleeve, and the second inflation port is configured to be connected to an air source.

[0062] In the above technical solution, by setting the second sleeve to be sleeved on the outside of the second feed pipe and the second discharge pipe, the second sleeve can be used to seal the connection position of the second feed pipe and the second discharge pipe, reduce the probability of leakage at the connection position of the second feed pipe and the second discharge pipe, and ensure the sealing performance of the connection position. Since the second sleeve is formed with a second inflation port connected to the air source, the second inflation cavity is inflated through the second inflation port, which can reduce the probability of powder leakage from the gap between the second feed pipe and the second discharge pipe, and improve the sealing performance between the second feed pipe and the second discharge pipe.

[0063] In a second aspect, an embodiment of the present application provides a production system, which 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 connected to the powder inlet of the pulping tank.

[0064] In the above technical scheme, since the production system is provided with the above-mentioned 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 transported to the sending tank through the screw feeder. It can not only realize the automatic transportation of the powder in the temporary storage tank to the sending tank, but also can accurately measure the weight of the powder to be dosed to the sending tank, thereby realizing highly automated batching of the powder and improving the batching efficiency.

[0065] In some embodiments, there are multiple pulping tanks, 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, and 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 a first target weight of powder from a temporary storage tank to a sending tank.

[0068] In the above technical scheme, 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. Therefore, not only can the screw feeder realize automatic conveying of the powder, but also the conveying amount of the powder can be accurately controlled, and then the amount of powder conveyed 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 packaging, 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 the ingredients are rotated 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 scheme, after the powder is conveyed to the sending tank by 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 to feed 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 scheme, after receiving the feeding instruction to feed the pulping system, by driving the sending tank to vibrate and introducing compressed nitrogen into the sending tank, the powder and compressed nitrogen can be premixed, thereby improving the powder conveying efficiency and the subsequent pulping efficiency of the pulping system.

[0075] In a fourth aspect, an embodiment of the present application provides a control method for a powder feeding system, wherein the powder feeding system is a powder feeding system according to the first aspect of the present application, wherein the glove box comprises a box body and a first liner arranged in the box body, and the control method comprises: S21, confirming that the glove box has completed feeding into the temporary storage tank; S22, driving the first liner to vibrate; and S23, purging the inner wall of the glove box.

[0076] In the above technical solution, after confirming that the glove box has been filled, the first liner is driven to vibrate so that the powder adhering to the first liner 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. In this way, the residual powder in the glove box can be reduced, the powder loss can be reduced, and the health risks of operators caused by contact with powder can be reduced.

[0077] In some embodiments, a first gap space is formed between the box body and the first liner, and step S22 includes: S221, introducing gas into the first gap space and continuing for a first preset time; S222, sucking gas in the first gap space and continuing for a second preset time; S223, detecting whether the weight of the powder dropped from the glove box into the temporary storage tank reaches the second target weight, if so, the dropping of powder is terminated, if not, executing S221.

[0078] In the above technical scheme, by first introducing gas into the first gap space and then sucking the gas in the first gap space, the first liner can be shaken to shake off the powder adhering to the first liner, and then the weight of the powder falling from the glove box into the temporary storage tank is detected to determine the residual amount of powder in the glove box, and then determine whether the powder in the glove box is completely shaken off. In this way, it can be ensured that the powder in the glove box falls completely 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: determining whether the total running time of step S22 is greater than the third preset time, if not, executing S221, and if so, issuing an alarm message of material dropping timeout.

[0080] In the above technical solution, when the weight of the powder 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 dropping timeout is issued to remind the operator that the material dropping is abnormal, thereby reducing the occurrence of the first lining vibrating for dust removal because the weight of the powder falling into the temporary storage tank does not reach 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 a first preset pressure; S232, introducing a purge gas into the glove box; S233, confirming that the pressure in the glove box is greater than the first preset pressure and lasts for a first time; S234, stopping the introduction of a purge gas into the glove box; S235, detecting and determining whether the pressure in the glove box is less than a second preset pressure, the second preset pressure is less than the first preset pressure, if so, end the purge, if not, execute S232.

[0082] In the above technical solution, not only can the glove box be purged and cleaned to reduce the residual powder on the inner wall of the glove box, but the pressure in the glove box can also be kept in a negative pressure state after purging to ensure 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 a first preset pressure and a 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 is less than the third preset pressure, execute S2313, if the pressure in the glove box is greater than the third preset pressure and less than the first preset pressure, execute S232; S2313, turn off the first dust removal fan connected to the glove box, and open 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, 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 blower is not turned on, and only the first dust removal valve is turned on, so as to increase the pressure in the glove box and reduce the occurrence of low pressure in the glove box due to direct blowing of the glove box, thereby ensuring that the glove box can work normally.

[0085] In a fifth aspect, an embodiment of the present application provides a control method for a powder feeding system, and the powder feeding system is a powder feeding system according to the first aspect of the present application, and the control method includes: S31, obtaining the initial weight of the temporary storage tank; S32, controlling the glove box to drop materials into the temporary storage tank; S33, obtaining the weight of the temporary storage tank after the glove box drops 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 of the temporary storage tank after feeding materials as the second weight; S36, confirming that the difference between the second weight and the initial weight is within a preset range; S37, the feeding is completed, wherein, 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 scheme, the weight of the temporary storage tank under the preset weighing pressure is obtained before and after the temporary storage tank is dropped and after the temporary storage tank is fed to the sending tank. This can significantly reduce the weighing error caused by the different internal pressures of the temporary storage tank, thereby accurately measuring the weight of the powder delivered from the glove box to the sending tank. It can also monitor and reduce the adhesion of powder in the glove box and the temporary storage tank to the maximum extent during the entire conveying process of the powder feeding system, thereby reducing powder loss.

[0087] In some embodiments, step S31 includes: S311, introducing inert gas into the temporary storage tank to replace the air in the temporary storage tank; S312, closing the first discharge valve of the glove box, opening the first feed valve of the temporary storage tank, S313, adjusting the air pressure in the temporary storage tank to a 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 replacing 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 hazardous gases can be reduced, and the risk of the powder changing its performance in the temporary storage tank can be reduced. 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 first connection position of the first feed pipe and the first discharge pipe on the pulling force of the temporary storage tank, thereby improving the weighing accuracy of the temporary storage tank.

[0089] In some embodiments, step S33 includes: S331, confirming that the material discharge from the glove box to the temporary storage tank is completed; S332, closing the first discharge valve of the glove box; S333, adjusting the air pressure in the temporary storage tank to a 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, it is possible to obtain the current weight of the temporary storage tank again under the preset weighing pressure condition, thereby 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 the sending tank.

[0092] In the above technical solution, the pressure of the sending tank is adjusted to the preset weighing pressure, so that the pressure in the sending tank can be consistent with the pressure in the temporary storage tank, which is beneficial to transport the powder in the temporary storage tank to the sending tank, reduce the transportation resistance, and improve the transportation stability and efficiency.

[0093] In some embodiments, step S35 includes: S351, driving the second 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 a first 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 a preset weighing pressure; S355, obtaining the current weight of the temporary storage tank as the second weight.

[0094] In the above technical scheme, the powder residue in the temporary storage tank can be reduced by vibrating and purging the temporary storage tank. When weighing the temporary storage tank, the first feed valve and the second discharge valve are opened and the first discharge valve and the second feed valve are closed. This can reduce the influence of the pulling force of 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, thereby improving the weighing accuracy of the temporary storage tank.

[0095] In some embodiments, step S36 includes: comparing the second weight with the initial weight, and when the difference between the second weight and the initial weight is within a preset range, executing S37; when the difference between the second weight and the initial weight exceeds the preset range, closing the first feed valve of the temporary storage tank, opening the second feed valve of the sending tank, and then re-executing step S35.

[0096] In the above technical solution, it can be accurately determined whether the powder dropped from the glove box into the temporary storage tank is completely transported to the sending tank, thereby reducing the adhesion of the powder in the temporary storage tank and reducing the loss of powder.

[0097] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] Figure 1 is a schematic diagram of the structure of a production system according to an embodiment of the present application; Figure 2 is a schematic structural diagram of a powder feeding system according to an embodiment of the present application; Figure 3is a schematic structural diagram of a glove box of a powder feeding system according to an embodiment of the present application; Figure 4 yes Figure 2 A schematic structural diagram of the first feed pipe, the first discharge pipe and the first sleeve pipe shown in FIG. Figure 5 yes Figure 2 A schematic structural diagram of the second feed pipe, the second discharge pipe and the second sleeve pipe shown in FIG. Figure 6 is a control flow chart of a powder feeding system according to an embodiment of the present application when shaking and cleaning a glove box; Figure 7 is a control flow chart of the powder feeding system when purging the glove box according to an embodiment of the present application; Figure 8 It is a control flow chart of the batching of the powder feeding system from the glove box to the temporary storage tank and then to the sending tank according to the embodiment of the present application; Fig. 9 It is a feeding flow chart of the powder feeding system according to an embodiment of the present application.

[0099] Reference numerals: 1000. Production system; 100. Powder feeding system; 10. glove box; 101. first material storage chamber; 102. first gap space; 11. Box body; 12. First lining; 13. First discharge pipe; 14. First discharge valve; 20. Temporary storage tank; 201. Second material storage chamber; 23. First material feed pipe; 24. First material feed valve; 30. Screw feeder; 31. Second discharge pipe; 32. Second discharge valve; 40. Sending tank; 401. Third material storage chamber; 41. Second material feed pipe; 42. Second material feed valve; 50. dust removal fan; 511. first air pipe; 512. first dust removal valve; 521, second air pipe; 522, second dust removal valve; 531, third air pipe; 532, third dust removal valve; 61, first sleeve; 611, first air-filled cavity; 62, second sleeve; 621, second air-filled cavity; 800. Pulping system; 80. Pulping tank. DETAILED DESCRIPTION

[0100] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0101] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0102] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0103] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0104] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0105] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0106] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0107] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of 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 the specific circumstances.

[0108] At present, from the perspective of market development, 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 stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0109] The electrode assembly is the component in the battery cell where the electrochemical reaction occurs. During the manufacturing process of the electrode assembly, the positive and negative electrode slurries need to be coated on the pole pieces. The raw materials of the positive and negative electrode slurries are stored in ton bags. When the electrode assembly needs to be prepared, the powder stored in the ton bags needs to be transported to the pulping system, which re-forms it into slurry and finally coats it on the pole pieces.

[0110] Currently, in the preparation process of hazardous powders in the lithium battery industry, there is a problem of powder exposure when bags are opened. This method is not suitable for toxic, flammable, explosive and other highly dangerous powders. For example, sulfide powder will react with water in the air to produce hydrogen sulfide after leakage. Therefore, in the preparation process of solid-state battery powders, it is usually necessary to adopt closed space metering and transportation.

[0111] In the traditional lithium battery industry, powder material feeding, metering and transportation processes are usually done manually after weighing and then feeding into fixed packages. This method is inefficient and cannot achieve large-scale mass production.

[0112] Based on the above considerations, in order to realize the mass production of powder feeding, the present application designs a powder feeding system, in which a screw feeder is arranged between the temporary storage tank and the sending tank, and the powder in the temporary storage tank is transported to the sending tank by the screw feeder, which can not only realize the automatic transportation of the powder in the temporary storage tank to the sending tank, but also accurately measure the weight of the powder to be batched into the sending tank, realize highly automated batching of powder, and improve batching efficiency. Compared with the batching method of manual weighing and then using fixed packaging to feed, 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.

[0113] 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) and other powders, which are transported to the pulping system, and the prepared slurry is used to apply to the foil (such as aluminum foil and copper foil, wherein the aluminum foil is used for the positive electrode and the copper foil is used for the negative electrode) to form a pole piece, which can be formed into an electrode assembly by lamination or winding, and then assembled into battery cells, electrical devices and various energy storage systems. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.

[0114] Refer to the following Figure 1-Figure 5 The powder feeding system 100 of the present application and the production system 1000 having the powder feeding system 100 are introduced in detail.

[0115] Figure 1 is a schematic diagram of the structure of a production system 1000 according to an embodiment of the present application; Figure 2 is a schematic structural diagram of a powder feeding system 100 according to an embodiment of the present application; Figure 3 is a structural schematic diagram of a glove box 10 of a powder feeding system 100 according to an embodiment of the present application; Figure 4 yes Figure 2 A schematic structural diagram of the first feed pipe 23, the first discharge pipe 13 and the first sleeve 61 shown in FIG. Figure 5 yes Figure 2 A schematic structural diagram of the second feed pipe 41, the second discharge pipe 31 and the second sleeve 62 is shown in FIG.

[0116] The present application embodiment provides a powder feeding system 100, such as Figure 1 and Figure 2 As 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, 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 transport the powder in the temporary storage tank 20 to the sending tank 40, the outlet of the sending tank 40 is suitable for connecting to the pulping system 800, and the powder feeding system 100 is configured to measure the weight of the powder transported to the sending tank 40 by the screw feeder 30.

[0117] The powder feeding system 100 of this embodiment can be applied to the feeding process of some dangerous powders in the battery production process, and can also be used in the feeding process of some powders in other production processes.

[0118] The glove box 10 usually has a sealed box body 11, which can be filled with inert gas to create a specific box environment. The glove box 10 is provided with gloves installed on the box body 11, and the operator can operate without directly contacting the substances in the box. It is mainly used to handle substances that are sensitive to air and moisture, such as materials used in the research and development and production of lithium batteries, semiconductor manufacturing, special material preparation, biopharmaceuticals and other fields.

[0119] The temporary storage tank 20 is a container device used for temporarily storing various materials. It can temporarily store raw materials or semi-finished products to be processed, play a role in buffering, adjusting the production rhythm and ensuring a stable supply of materials.

[0120] “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 to the inlet of the temporary storage tank 20, so that the powder in the glove box 10 can enter the temporary storage tank 20 through the outlet of the glove box 10 and the inlet of the temporary storage tank 20 in sequence and be temporarily stored in the temporary storage tank 20. 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 a control valve and other structures can be connected in series to the connecting pipe.

[0121] 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, wherein 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.

[0122] The outlet of the sending tank 40 can be connected to the pulping system 800 through a connecting pipe, and is used to supply powder to the pulping system 800 to facilitate the subsequent pulping process. In some embodiments, the powder in the sending tank 40 can be transported to the pulping system 800 by positive pressure, and a blower can be provided, which is connected to the sending tank 40 and is used to blow the powder in the sending tank 40 to the pulping system 800.

[0123] When the screw feeder 30 is working, the motor drives the screw shaft to rotate, and the spiral blade pushes the material from the feed port along the trough to the discharge port. In the process of conveying powder by the screw feeder 30, the conveying amount is proportional to the rotation speed of the screw shaft. The conveying amount of the screw feeder 30 can be directly calculated according to the rotation speed of the screw shaft and the equipment parameters of the screw feeder 30 (such as the size and pitch of the spiral blade). It is also possible to calculate the volume of material conveyed per unit time based on the spatial volume formed by the spiral blades and the trough of the screw feeder 30, combined with the rotation speed of the screw shaft, and then convert it into mass according to the density of the material to measure the amount of material conveyed. In addition, a weighing sensor can also be set at the discharge port or conveying path of the screw feeder 30 to directly measure the weight of the material passing through per unit time, thereby obtaining the conveying amount of the material.

[0124] In addition, the powder feeding system 100 measures the weight of the powder delivered to the sending tank 40 by the screw feeder 30, and can also provide a weighing sensor for measuring the weight of the temporary storage tank 20, and monitor the weight change of the temporary storage tank 20 to achieve the weight of the powder delivered to the sending tank 40; a weighing sensor for measuring the weight of the sending tank 40 can also be provided, and the weight change of the sending tank 40 can be monitored to achieve the weight of the powder delivered to the sending tank 40.

[0125] In the above technical solution, a screw feeder 30 is provided between the temporary storage tank 20 and the sending tank 40, and the powder in the temporary storage tank 20 is transported to the sending tank 40 by the screw feeder 30. In this way, not only can the powder in the temporary storage tank 20 be automatically transported to the sending tank 40, but also the weight of the powder to be batched to the sending tank 40 can be accurately measured, so as to achieve highly automated batching of the powder and improve batching efficiency. Compared with the batching method of weighing manually and then feeding in fixed packages, 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 powder, and reduce the harm of powder to health.

[0126] In some embodiments of the present application, Figure 2-Figure 3 As shown, the glove box 10 includes: a box body 11 and a first liner 12 . The first liner 12 is arranged in the box body 11 , and the inner side of the first liner 12 defines a first material storage chamber 101 of the glove box 10 .

[0127] The box body 11 is the main frame structure of the glove box 10, and is used to improve the structural strength of the glove box 10 and isolate the internal space of the box body 11 from the external environment. The box body 11 can be a metal part or a plastic part.

[0128] In the above technical solution, since a 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 since the first storage chamber 101 is located on the inner side of the first lining 12, the first lining 12 can isolate the powder in the first storage chamber 101 from the box body 11, reducing the direct contact between the powder and the box body 11, thereby protecting the box body 11, reducing the probability of the box body 11 being corroded by the powder, and improving the service life of the glove box 10.

[0129] In some embodiments of the present application, the powder feeding system 100 further includes: a first vibration driving device, which is used to drive the first liner 12 to vibrate.

[0130] In some examples, the first vibration driving device may be a vibration exciter.

[0131] When powder is stored in the first storage chamber 101 of the glove box 10, the powder will be adsorbed on the first lining 12. After the glove box 10 drops the powder into the temporary storage tank 20, some powder will remain on the inner wall of the first lining 12, resulting in incomplete dropping of the powder. Moreover, when the glove box 10 needs to be opened again and powder is dropped into the glove box 10, the powder remaining in the glove box 10 will chemically react with the air or come into contact with the human body, affecting the health of the operators.

[0132] In this embodiment, a first vibration driving device is provided to drive the first liner 12 to vibrate. After the glove box 10 drops the powder into the temporary storage tank 20, the first vibration driving device can drive the first liner 12 to vibrate. Through the vibration of the first liner 12, the powder adsorbed or adhered to the first liner 12 can be shaken off, thereby improving the dropping efficiency of the material into the temporary storage tank 20, reducing the residual powder in the glove box 10, and reducing the loss of powder.

[0133] In the above technical solution, since the first vibration driving device is provided, by driving the first lining 12 to vibrate, the powder adsorbed or adhered to the first lining 12 can be shaken off, thereby reducing the amount of powder residue in the glove box 10 and reducing the impact on the health of operators.

[0134] In some embodiments of the present application, Figure 3 As shown, 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. The first airflow driving mechanism blows gas into the first gap space 102 and extracts the gas in the first gap space 102 through the first ventilation pipe.

[0135] The first inner lining 12 is an elastic member, and under the action of an external force, the first inner lining 12 can be elastically deformed. For example, the first inner lining 12 can be a rubber member.

[0136] A first gap space 102 is formed between the box body 11 and the first lining 12, that is, the box body 11 is connected to the periphery of the first lining 12, and the box body 11 and the first lining 12 enclose a first gap space 102 that is not connected to the first storage chamber 101. The first airflow 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.

[0137] As the pressure difference on both sides of the first liner 12 changes, the first liner 12 can be elastically deformed under the action of the pressure difference. When the pressure in the first gap space 102 changes repeatedly, the first liner 12 can be repeatedly deformed and restored. At this time, the first liner 12 vibrates under the drive of the repeatedly changing pressure difference, thereby shaking off the powder on the inner wall surface of the first liner 12, further reducing the amount of powder adhering to the first liner 12, reducing the amount of powder residue in the glove box 10, and reducing the impact on the health of operators.

[0138] In some examples, the first airflow driving mechanism may be a fan. A control valve may be serially connected to the first ventilation pipe to control the on-off of the first ventilation pipe and to adjust the gas flow in the first ventilation pipe.

[0139] In the above technical solution, since the first lining 12 is an elastic member and cooperates with the box body 11 to define the first gap space 102, the first airflow 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 lining 12 can vibrate under the action of the changing pressure, further shake off the powder on the first lining 12, and further reduce the impact of residual powder in the glove box 10 on the health of operators.

[0140] In some embodiments of the present application, reference Figure 3 A 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.

[0141] The first fan can be connected to the first air inlet through the first pipeline, and the first air inlet valve can be connected in series to the first pipeline to control the amount and flow rate of gas entering the first gap space 102 from the first air inlet. When the first fan is running, the first fan can send gas into the first gap space 102 through the first pipeline and the first air inlet, and the pressure of the first gap space 102 gradually increases. Under the pressure, the first liner 12 undergoes elastic deformation to bulge toward the first storage cavity 101.

[0142] The first vacuum pump may be connected to the first gas outlet through a second pipe, and a first vacuum valve may be connected in series to the second pipe to control the amount and flow rate of gas flowing out of the first gap space 102 from the first gas outlet. When the first vacuum pump is running, the first vacuum pump may extract the gas in the first gap space 102 through the first gas outlet and the second pipe. At this time, the pressure in the first gap space 102 gradually decreases, and under the pressure, the first liner 12 undergoes elastic deformation to bulge away from the first storage chamber 101 toward the box body 11.

[0143] 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 from 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.

[0144] In some embodiments of the present application, the first blower and the first vacuum pump are configured to operate alternately to cause the first liner 12 to vibrate.

[0145] For example, when it is necessary to shake off the powder on the first liner 12, the first fan can be controlled to run for a first preset time to keep the pressure of the gas introduced at the first preset pressure, and then the first vacuum pump can be controlled to run for a second preset time to keep the pressure of the vacuum pump at the second preset pressure, and this can be repeated for a certain period of time. The first preset time and the second preset time can be the same or different.

[0146] 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 .

[0147] In some embodiments of the present application, reference Figure 3 , the first lining 12 is a non-metallic part.

[0148] In the above technical solution, since the first lining 12 is a non-metallic part, the probability of the first lining 12 generating electrostatic adsorption of powder can be reduced, and the risk of the first lining 12 and the powder rubbing to generate metal particles and causing the metal particles to enter 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 guaranteed.

[0149] In some embodiments of the present application, the first lining 12 is a fluororubber member.

[0150] 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 damage to the first lining 12, thereby ensuring the normal use of the glove box 10 and the purity of the powder.

[0151] 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 11. In addition, the surface of fluororubber is smooth and not easy to adhere to the solid powder of the battery. It is relatively easy to clean and can effectively reduce the pollution of the first lining 12 caused by the residual powder.

[0152] In the above technical solution, by setting the first lining 12 as a fluororubber part, the corrosion resistance and sealing performance of the first lining 12 can be improved, the probability of powder adhering to the first lining 12 can be reduced, and the service life of the first lining 12 can be increased.

[0153] In some embodiments of the present application, the powder feeding system 100 also includes: a first purge device, the first purge device includes: 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 extends into the first storage chamber 101 of the glove box 10, and is used to purge the powder on the inner wall of the first storage chamber 101.

[0154] After the glove box 10 is dropped into the temporary storage tank 20, the powder remaining on the inner wall of the glove box 10 can be purged by the first purging device, for example, by introducing gas of 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 purge gas can be flexibly controlled, and precise purging can be performed according to actual needs, thereby improving the controllability and adaptability of the purging operation to meet the cleaning needs under different working conditions.

[0155] By providing a first purge device, this embodiment can effectively purge the powder attached to the inner wall of the first storage chamber 101, reduce the risk of long-term accumulation of powder on the inner wall affecting the effective space of the first storage chamber 101, and reduce the risk of long-term adhesion of powder to the inner wall of the glove box 10 causing corrosion and wear, extend the service life of the glove box 10, and allow the powder attached to the inner wall of the glove box 10 to re-participate in the subsequent material preparation process, reducing the waste of powder. In addition, it can also reduce the difficulty and frequency of manual cleaning of the glove box 10, reduce the direct contact between operators and powder, reduce labor intensity, and also reduce the health risks that may be caused by manual cleaning.

[0156] In some examples, the first purging device may further include a first dust removal fan, the outlet of which is connected to the glove box 10 through the first air pipe 511. When actively purging the glove box 10, the first dust removal fan may be started, and the first dust removal valve 512 may be opened, so that the outlet of the first dust removal fan is connected to the first storage chamber 101 of the glove box 10. When the purging is finished, the first dust removal fan may be turned off, and the first dust removal valve 512 may 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 turned off, the first storage chamber 101 may 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 of the external environment or the gas source may also enter the first storage chamber 101 through the first air pipe 511 to change the pressure in the first storage chamber 101.

[0157] In some examples, when the first purge device purges the glove box 10 , the purge gas is dry compressed air or compressed nitrogen.

[0158] In some examples, a blowing structure is provided at one end of the first air pipe 511 extending into the glove box 10. For example, the blowing structure may be a blowing chamber or a nozzle, etc. Furthermore, the blowing direction of the blowing structure in the glove box 10 is adjustable, thereby further increasing the blowing range of the inner wall of the glove box 10, thereby improving the blowing efficiency of the first blowing device and the dust removal effect on the glove box 10.

[0159] In the above technical solution, since a first purge device is provided to purge the powder on the inner wall of the first storage chamber 101, the probability of powder adhering to the glove box 10 can be reduced, the service life of the glove box 10 can be improved, the waste of powder can be reduced, and the risk of powder contacting operators can be reduced.

[0160] In some embodiments of the present application, the first dust removal valve 512 is arranged outside the glove box 10 .

[0161] That is, the first dust removal valve 512 is connected in series to the part of the first air pipe 511 arranged outside the glove box 10. In this way, when the first dust removal valve 512 needs to be controlled, the operator does not need to open the glove box 10 or operate the components in the box body 11 through the gloves, but can directly operate the first dust removal valve 512 outside the glove box 10, control the start and stop of the first purge device, and adjust the gas flow, etc., which greatly improves the convenience of operation and saves operation time.

[0162] At the same time, since the first dust removal valve 512 is arranged on the outside of the glove box 10, the first dust removal valve 512 can be easily inspected and maintained without entering the complex environment inside the glove box 10, thereby reducing the difficulty and cost of maintenance. The first dust removal valve 512 does not occupy the space inside the glove box 10, so that the space inside the glove box 10 can be more reasonably used to store and process powder, thereby improving space utilization.

[0163] In the above technical solution, since the first dust removal valve 512 is arranged on the outside of 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 purge device, thereby improving operational convenience and facilitating the inspection and maintenance of the first dust removal valve 512. The first dust removal valve 512 can also be made to not occupy the space inside the glove box 10, thereby improving the space utilization rate inside the glove box 10.

[0164] In some embodiments of the present application, the first dust removal valve 512 is formed as a foot valve. The foot valve is a valve whose opening and closing states are controlled by a foot pedal.

[0165] In the above technical solution, by setting the first dust removal valve 512 as a foot valve, the foot valve needs to be actively stepped on to operate, 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. In addition, by adjusting the pedaling force and stroke, the gas flow and on-off can be flexibly adjusted to keep the powder feeding system 100 running well.

[0166] 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 of 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 first air pipe 511 is 0.000012566m 2 When the glove box 10 is purged, 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 gas introduced into the glove box 10 is 1.657155006 L, and the pressure in the glove box 10 is 0.77983765 kPa.

[0167] In some embodiments of the present application, the powder feeding system 100 further includes: a first detection device, the first detection device is used to detect the air pressure in the first storage chamber 101, and the first detection device is communicatively connected to the first purge device.

[0168] The first detection device can monitor the pressure change in the first storage chamber 101 in real time. Since the glove box 10 includes gloves inserted into the first storage chamber 101, in order for the glove box 10 to work properly, the pressure in the first storage chamber 101 should be balanced with the external environmental pressure or less than the external environmental pressure.

[0169] When the first purge device is purging the first storage chamber 101, it is necessary to continuously introduce gas of a certain pressure into the first storage chamber 101. During the purge process, the pressure in the first storage chamber 101 increases. Since the first detection device is communicatively connected with the first purge device, when it is detected that the pressure in the first storage chamber 101 is equal to or greater than the external environmental pressure, the first purge device can be controlled to stop purge, thereby controlling the pressure in the first storage chamber 101 within a preset value range, thereby reducing the risk of the gloves being pressed out to the outside of the box 11 under the action of air pressure.

[0170] At the same time, since the pressure value detected by the first detection device can be fed back to the first purge device in real time, the purge operation can be automatically adjusted according to the air pressure in the first material storage chamber 101. There is no need for frequent manual inspection and manual start of purge, which reduces manual intervention, improves the degree of automation of the production process, and thus improves overall production efficiency.

[0171] In some examples, the first detection device may be a pressure sensor.

[0172] In the above technical solution, by setting up a first detection device for detecting the air pressure in the first storage chamber 101, not only can the pressure in the glove box 10 be monitored in real time to maintain the pressure in the glove box 10 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 101, thereby reducing manual intervention, reducing the probability of misoperation, and improving overall production efficiency.

[0173] In some embodiments of the present application, the temporary storage tank 20 includes a tank body and a second liner, the second liner is disposed in the tank body, and the inner side of the second liner defines a second material storage chamber 201 of the temporary storage tank 20 .

[0174] The tank body is the main frame structure of the temporary storage tank 20, which is used to improve the structural strength of the temporary storage tank 20 and isolate the internal space of the temporary storage tank 20 from the external environment. The tank body can be a metal part or a plastic part.

[0175] In the above technical solution, by dividing the temporary storage tank 20 into an inner and outer tank body and a second lining, the second lining can enhance the structural strength of the temporary storage tank 20. Since the second storage chamber 201 is formed on the inner side of the second lining, the second lining can isolate the powder in the second storage chamber 201 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 20.

[0176] 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 liner to vibrate.

[0177] In some examples, the second vibration driving device can be a vibrator. When powder is stored in the second storage chamber 201 of the temporary storage tank 20, part of the powder may be adsorbed on the second lining. After the temporary storage tank 20 feeds the sending tank 40, part of the powder will remain on the inner wall of the second lining, resulting in incomplete feeding. On the one hand, the powder not only takes up space in the temporary storage tank 20, but also has the risk of corroding the temporary storage tank 20. On the other hand, it also causes waste of powder and increases production costs.

[0178] In this embodiment, a second vibration driving device is provided to drive the second lining to vibrate. After the temporary storage tank 20 transports the powder to the sending tank 40, the second vibration driving device can drive the second lining to vibrate. Through the vibration of the second lining, the powder adsorbed or adhered to the second lining can be shaken off, thereby improving the feeding efficiency into the sending tank 40, reducing the residual powder in the temporary storage tank 20, and reducing the loss of powder.

[0179] In the above technical solution, since the second vibration driving device is provided, by driving the second liner to vibrate, the powder adsorbed or adhered to the second liner can be shaken off, thereby reducing the residual powder in the temporary storage tank 20 and reducing the loss of powder.

[0180] It should be noted that the structures of the second vibration driving device and the first vibration driving device in this embodiment may be the same or different.

[0181] In some embodiments of the present application, the second lining is an elastic member, and a second gap space is formed between the tank body and the second lining. The second vibration driving device includes a second ventilation pipe and a second airflow driving mechanism. One end of the second ventilation pipe is connected to the second airflow driving mechanism and the other end is connected to the second gap space. The second airflow driving mechanism blows gas into the second gap space and extracts the gas in the second gap space through the second ventilation pipe.

[0182] The second liner is an elastic member, and the second liner can be elastically deformed under the action of external force. For example, the second liner can be a rubber member. A second gap space is formed between the tank body and the second liner, that is, the tank body is connected to the periphery of the second liner, and the tank body and the second liner enclose a second gap space that is not connected to the second storage chamber 201. The second airflow driving mechanism can ventilate the second gap space through the second ventilation pipe, and can also inhale air from the second gap space to change the pressure in the second gap space.

[0183] Due to the change in the pressure difference on both sides of the second liner, the second liner can undergo elastic deformation under the action of the pressure difference. When the pressure in the second gap space changes repeatedly, the second liner can repeatedly deform and recover. At this time, the second liner vibrates under the drive of the repeatedly changing pressure difference, thereby shaking off the powder on the inner wall surface of the second liner, further reducing the amount of powder adhering to the second liner, and reducing the amount of powder remaining in the temporary storage tank 20.

[0184] In some examples, the second air flow driving mechanism may be a fan. A control valve may be connected in series to the second ventilation pipe to control the on-off of the second ventilation pipe and to adjust the gas flow in the second ventilation pipe.

[0185] In the above technical solution, since the second liner is an elastic member and cooperates with the tank body to define the second gap space, the second airflow 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 liner can vibrate under the action of the changing pressure, further shake off the powder on the second liner, and further reduce the residual powder in the temporary storage tank 20.

[0186] In some embodiments of the present application, a second air inlet and a second air outlet, which are arranged at intervals and communicated with the second gap space, are formed on the tank body, and 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.

[0187] The second fan can be connected to the second air inlet through a third pipe, and a second air inlet valve can be connected in series to the third pipe to control the amount and flow rate of gas entering the second gap space from the second air inlet. When the second fan is running, the second fan can deliver gas into the second gap space through the third pipe and the second air inlet, and the pressure of the second gap space gradually increases. Under the pressure, the second liner undergoes elastic deformation to bulge toward the second storage cavity 201.

[0188] The second vacuum pump can be connected to the second gas outlet through a fourth pipe, and a second vacuum valve can be connected in series to the fourth pipe to control the amount and flow rate of gas flowing out of the second gap space from the second gas outlet. When the second vacuum pump is running, the second vacuum pump can extract the gas in the second gap space through the second gas outlet and the fourth pipe. At this time, the pressure in the second gap space gradually decreases, and under the push of the pressure, the second liner undergoes elastic deformation to bulge away from the second storage cavity 201 toward the tank body.

[0189] In the above technical solution, since the second fan and the second vacuum pump connected to the second gap space are respectively provided, it is convenient to input and extract gas into and from the second gap space. The structure is simple and the control is convenient. The second lining can be shaken conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the second lining.

[0190] In some embodiments of the present application, the second blower and the second vacuum pump are configured to operate alternately to shake the second liner. For example, when it is necessary to shake off the powder on the second liner, the second blower can be controlled to operate for a third set time to keep the pressure of the gas introduced at the third set pressure, and then the second vacuum pump can be controlled to operate for a fourth set time to keep the pressure of the vacuum pump at the fourth set pressure, and this can be repeated for a certain period of time. The third set time and the fourth set time can be the same or different.

[0191] In some examples, the third set time may be 2s-10s, for example, the third set time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The third set pressure may be 3kPa-15kPa, for example, the third set pressure may be 3kPa, 4kPa, 5kPa, 6kPa, 7kPa, 8kPa, 9kPa, 10kPa, 11kPa, 12kPa, 13kPa or 14kPa, etc.

[0192] In some examples, the fourth set time may be 2s-10s, for example, the fourth set time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The fourth set pressure may be -3kPa to -15kPa, for example, the fourth set pressure may be -3kPa, -4kPa, -5kPa, -6kPa, -7kPa, -8kPa, -9kPa, -10kPa, -11kPa, -12kPa, -13kPa or -14kPa, etc.

[0193] In the above technical solution, since the second fan and the second vacuum pump are configured to operate alternately, the second liner can be shaken conveniently and efficiently, thereby improving the efficiency of shaking off the powder on the second liner.

[0194] In some embodiments of the present application, reference Figure 3 The second liner is a non-metallic part. Therefore, the probability of the second liner generating electrostatic adsorption of powder can be reduced, and the risk of the second liner and the powder generating metal particles due to friction and causing the metal particles to enter the powder can be reduced. When the powder feeding system 100 is used in the production system 1000 for producing batteries, the battery performance can be guaranteed.

[0195] In some embodiments of the present application, the second lining is a fluororubber part, thereby improving the corrosion resistance and sealing performance of the second lining, reducing the probability of powder adhering to the second lining, and increasing the service life of the second lining.

[0196] In some embodiments of the present application, the powder feeding system 100 also includes: a second purge device, the second purge device includes: 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 is connected to the second storage chamber 201 of the temporary storage tank 20, and is used to transport gas to the second storage chamber 201 to purge the powder on the inner wall of the second storage chamber 201.

[0197] After the temporary storage tank 20 feeds the material into the sending tank 40, the inner wall of the temporary storage tank 20 and the powder remaining inside the screw feeder 30 can be purged by the second purging device, for example, by introducing gas of set pressure 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 purge gas can be flexibly controlled, and precise purging can be performed according to actual needs, thereby improving the controllability and adaptability of the purging operation to meet the cleaning needs under different working conditions.

[0198] By providing a second purge device, this embodiment can effectively purge the powder attached to the inner wall of the second storage chamber 201, reduce the risk of long-term accumulation of powder on the inner wall affecting the effective space of the second storage chamber 201, and reduce the risk of long-term adhesion of powder to the inner wall of the temporary storage tank 20 causing corrosion and wear, extend the service life of the temporary storage tank 20, and allow the powder attached to the inner wall of the temporary storage tank 20 to re-participate in the subsequent material preparation process, reducing the waste of powder. In addition, it can also reduce the difficulty and frequency of manual cleaning of the temporary storage tank 20, reduce the direct contact between operators and powder, reduce labor intensity, and also reduce the health risks that may be caused by manual cleaning.

[0199] In some examples, the second purge device may further include a second dust removal fan, the outlet of which is connected to the temporary storage tank 20 through a second air pipe 521. When actively purging the temporary storage tank 20, the second dust removal fan may be started, and the second dust removal valve 522 may be opened, so that the outlet of the second dust removal fan is connected to the second storage chamber 201 of the temporary storage tank 20. When the purge is completed, the second dust removal fan may be turned off, and the second dust removal valve 522 may 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 chamber 201 may be connected to the external environment or the gas 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 of the external environment or the gas source may also enter the second storage chamber 201 through the second air pipe 521 to change the pressure in the second storage chamber 201.

[0200] In some examples, when the second purge device purges the temporary storage tank 20 , the purge gas is dry compressed air or compressed nitrogen.

[0201] In some examples, a blowing structure is provided at one end of the second air pipe 521 extending into the temporary storage tank 20. For example, the blowing structure can be a blowing chamber or a nozzle, etc. Furthermore, the blowing direction of the blowing structure in the temporary storage tank 20 is adjustable, thereby further increasing the blowing range of the inner wall of the temporary storage tank 20, thereby improving the blowing efficiency of the second blowing device and the dust removal effect on the temporary storage tank 20.

[0202] 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. In this case, the inlet end of the first air duct 511 and the inlet end of the second air duct 521 are both connected to the outlet of the dust removal fan 50.

[0203] In the above technical solution, by providing a second purge device for purging the powder on the inner wall of the second storage chamber 201, the probability of powder adhering to the temporary storage tank 20 can be reduced, the service life of the temporary storage tank 20 can be improved, the waste of powder can be reduced, and the risk of powder contacting operators can be reduced.

[0204] In some embodiments of the present application, the powder feeding system 100 further includes: a second detection device, the second detection device is used to detect the air pressure in the second material storage chamber 201, and the second detection device is communicatively connected to the second purge device.

[0205] The second detection device can monitor the air pressure change in the second material storage chamber 201 in real time. In this way, the pressure value detected by the second detection device can be fed back to the second purge device in real time, thereby automatically adjusting the purge operation according to the air pressure in the second material storage chamber 201, eliminating the need for frequent manual inspections and manual purge start, reducing manual intervention, improving the automation of the production process, and thus improving overall production efficiency.

[0206] In some examples, the second detection device may be a pressure sensor.

[0207] In the above technical solution, by setting up a second detection device for detecting the air pressure in the second storage chamber 201, not only can the pressure in the temporary storage tank 20 be monitored in real time to maintain the pressure in the temporary storage tank 20 within a suitable range, but the purge operation of the second purge device can also be automatically adjusted according to the air pressure in the second storage chamber 201, thereby reducing manual intervention and improving overall production efficiency.

[0208] In some embodiments of the present application, the powder feeding system 100 also includes: a third purge device, the third purge device includes: 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 is connected to the third material storage chamber 401 of the sending tank 40, and is used to transport gas to the third material storage chamber 401 to purge the powder on the inner wall of the third material storage chamber 401.

[0209] After the sending tank 40 delivers the material to the pulping system 800, the powder remaining on the inner wall of the sending tank 40 can be purged by the third purging device, for example, by introducing gas of 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, thereby improving the controllability and adaptability of the purging operation to meet the cleaning needs under different working conditions.

[0210] By providing the third purge device, the present embodiment can effectively purge the powder attached to the inner wall of the third storage chamber 401, reduce the risk of long-term accumulation of powder on the inner wall affecting the effective space of the third storage chamber 401, and reduce the risk of long-term adhesion of powder to the inner wall of the sending tank 40 causing corrosion and wear, extend the service life of the sending tank 40, and allow the powder attached to the inner wall of the sending tank 40 to participate in the subsequent material preparation process again, reducing the waste of powder. In addition, the difficulty and frequency of manual cleaning of the sending tank 40 can be reduced, the direct contact between the operator and the powder can be reduced, the labor intensity can be reduced, and the health risks that may be caused by manual cleaning can also be reduced.

[0211] In some examples, the third purging device may further include a third dust removal fan, the outlet of which 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 may be started, and the third dust removal valve 532 may 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 finished, the third dust removal fan may be turned off, and the third dust removal valve 532 may 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 turned off, the third storage chamber 401 may be connected to the external environment or the gas source through the third air pipe 531, the outlet and the inlet of the third dust removal fan, and at this time, under the action of the pressure difference, the gas of the external environment or the gas source may also enter the third storage chamber 401 through the third air pipe 531 to change the pressure in the third storage chamber 401.

[0212] In some examples, when the third purge device purges the sending tank 40 , the purge gas may be dry compressed air or compressed nitrogen.

[0213] In some examples, a blowing structure is provided at one end of the third air pipe 531 extending into the sending tank 40. For example, the blowing structure can be a blowing chamber or a nozzle, etc. Furthermore, the blowing direction of the blowing structure in the sending tank 40 is adjustable, thereby further increasing the blowing range of the inner wall of the sending tank 40, thereby improving the blowing efficiency of the third blowing device and the dust removal effect on the sending tank 40.

[0214] 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, and 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. In this case, the inlet end of the third air duct 531 and the inlet ends of the second air duct 521 and / or the first air duct 511 are all connected to the outlet of the dust removal fan 50.

[0215] In addition, in some examples, the powder in the sending tank 40 can be transported to the pulping system 800 by positive pressure conveying. Specifically, when it is necessary to convey powder to the pulping system 800, compressed nitrogen can be conveyed into the sending tank 40 by the third dust removal fan, and the compressed nitrogen is mixed with the powder and then transported to the pulping system 800 through a pipeline connected to the pulping system 800.

[0216] In the above technical solution, by setting up a third purge device for purging the powder on the inner wall of the third material storage chamber 401, the probability of powder adhering to the sending tank 40 can be reduced, the service life of the sending tank 40 can be improved, the waste of powder can be reduced, and the risk of powder contacting operators can be reduced. The third purge 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.

[0217] In some embodiments of the present application, the powder feeding system 100 further includes: a third detection device, which is used to detect the air pressure in the third material storage chamber 401, and the third detection device is communicatively connected to the third purge device.

[0218] The third detection device can monitor the air pressure change in the third material 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 purge device in real time, thereby automatically adjusting the purge operation according to the air pressure in the third material storage chamber 401, eliminating the need for frequent manual inspections and manual purge start, reducing manual intervention, improving the automation of the production process, and thus improving overall production efficiency.

[0219] In some examples, the third detection device may be a pressure sensor.

[0220] In the above technical solution, by setting up a third detection device for detecting the air pressure in the third material storage chamber 401, not only can the pressure in the sending tank 40 be monitored in real time to maintain the pressure in the sending tank 40 within an appropriate range, but the purge operation of the third purge device can also be automatically adjusted according to the air pressure in the third material storage chamber 401, thereby reducing manual intervention and improving overall production efficiency.

[0221] In some embodiments of the present application, the powder feeding system 100 further includes: a third vibration driving device, which is connected to the sending tank 40 and is used to drive the sending tank 40 to vibrate.

[0222] In some examples, the third vibration driving device may be a vibrator. When powder is stored in the third storage chamber 401 of the sending tank 40, part of the powder may be adsorbed on the inner wall of the sending tank 40. After the sending tank 40 feeds the pulping system 800, part of the 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 takes up space, but also has the risk of corroding the sending tank 40. On the other hand, it also causes waste of powder and increases production costs.

[0223] In addition, when positive pressure conveying is used to transport the powder in the sending tank 40 to the pulping system 800, 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 and the powder can be pre-mixed to improve the transportation efficiency of the powder.

[0224] In this embodiment, a third vibration driving device is provided to drive the sending tank 40 to vibrate. After the sending tank 40 transports the powder to 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 powder in the sending tank 40, and reduce the loss of powder.

[0225] 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 .

[0226] In some examples, the first weighing device may be a weighing sensor, wherein the weighing sensor may be a resistive strain weighing sensor, a capacitive weighing sensor, a hydraulic weighing sensor, or a pneumatic weighing sensor.

[0227] This embodiment can accurately measure the weight change of the material in the temporary storage tank 20 in real time by setting the first weighing device, and can not only accurately measure the weight of the powder sent into the temporary storage tank 20 by the glove box 10, but also accurately and in real time measure the weight of the powder sent 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 amount of powder added to the pulping system 800 and the amount of powder remaining in the temporary storage tank 20 can be accurately controlled, providing a stable and accurate powder supply for the pulping process, ensuring the consistency of production and product quality.

[0228] 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, thereby improving the automation level of the production process, reducing manual intervention, and improving production efficiency.

[0229] In addition, by setting up the first weighing device, the weight of the material in the temporary storage tank 20 can be accurately grasped, which can avoid material overflow and waste caused by excessive loading, while reducing the occurrence of accidents that affect production progress due to insufficient materials and improving resource utilization.

[0230] In the above technical solution, by setting a 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, so as to provide a stable and accurate supply of powder to the downstream process, improve the consistency of production and product quality, but also the degree of automation of the production process can be improved, manual intervention can be reduced, and production efficiency can be improved.

[0231] 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 up 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 from the glove box 10 to the temporary storage tank 20 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 excessive feeding, while reducing the occurrence of accidents that affect the production progress due to insufficient materials, and improving resource utilization.

[0232] In some embodiments of the present application, the powder feeding system 100 further includes: a third weighing device, which is used to detect the weight of the sending tank 40. In some examples, the third weighing device can be a weighing sensor. By setting the third weighing device, the present embodiment can accurately measure the weight change of the material in the sending tank 40 in real time, accurately measure the weight of the powder sent into the sending tank 40 by the temporary storage tank 20, and the weight of the powder delivered from the sending tank 40 to the pulping system 800. 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 excessive feeding, and reduce the occurrence of accidents that affect the production progress due to insufficient materials, thereby improving resource utilization.

[0233] In some embodiments of the present application, Figure 2 and Figure 4 As shown, a first discharge pipe 13 is provided at the bottom of the glove box 10, and a first discharge pipe 13 is connected in series with a first discharge valve 14. 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 with the first feed pipe 23. The powder feeding system 100 is configured to allow the powder in the glove box 10 to fall into the temporary storage tank 20 under the action of gravity.

[0234] 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 fall directly from the glove box 10 through the first discharge pipe 13 and the first feed pipe 23 into the second storage chamber 201 of the temporary storage tank 20 under the action of gravity.

[0235] In this embodiment, the first discharge valve 14 and the first feed valve 24 can be used to flexibly control the timing and speed of the powder falling from the glove box 10 into the temporary storage tank 20, so that the powder can fall in a timely and quantitative manner to meet the process requirements of powder feeding. At the same time, by connecting the first discharge valve 14 in series to the first discharge pipe 13 and the first feed valve 24 in series to the first feed pipe 23, the sealing performance of the glove box 10 and the temporary storage tank 20 can be improved, the probability of external air and impurities entering the glove box 10 and the temporary storage tank 20 can be reduced, and the quality of the powder can be guaranteed.

[0236] In the above technical solution, by utilizing gravity to allow the powder in the glove box 10 to fall directly into the temporary storage tank 20, no additional power equipment is required to drive the transmission, which can reduce equipment costs, reduce energy consumption, simplify the powder transmission process, and improve transmission efficiency, so that the powder can 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 the predetermined time, predetermined amount, and predetermined speed according to the process requirements, thereby improving the degree of automation of the production process and meeting the process requirements of feeding.

[0237] In some embodiments of the present application, Figure 4 As shown, 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 plug-connected.

[0238] It should be noted that in actual production, the relative positions of the glove box 10 and the temporary storage tank 20 may change due to fine-tuning of the installation position, equipment vibration and sedimentation, etc. This embodiment uses a slidable plug-in connection method for the first feed pipe 23 and the first discharge pipe 13 to automatically adapt to such position changes, ensure the continuity of powder transportation, reduce pipeline damage or loose connection caused by position deviation, and ensure smooth production.

[0239] In addition, it should be noted that when the temporary storage tank 20 and / or the glove box 10 are provided with a weighing sensor for detecting weight, if the first feed pipe 23 and the first discharge pipe 13 are relatively fixed, the mutual pulling force between the first feed pipe 23 and the first discharge pipe 13 affects the detection accuracy of the weighing sensor. If the first feed pipe 23 and the first discharge pipe 13 are indirectly connected by a soft rubber tube, the weighing of the temporary storage tank 20 will be abnormal due to the pressure difference between the temporary storage tank 20 and the external environment. At the same time, since the soft rubber tube needs to withstand the pressure and the scouring of the powder, the thickness of the soft rubber tube is relatively thick, often more than 5mm. 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.

[0240] In this embodiment, the first feed pipe 23 and the first discharge pipe 13 are connected in an up and down sliding manner, so that the influence of the mutual pulling between the first feed pipe 23 and the first discharge pipe 13 on the detection of the weighing sensor can be reduced, the detection accuracy of the weighing sensor can be improved, and a stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system 100, thereby ensuring the consistency of production and product quality.

[0241] In the above technical scheme, since the first feed pipe 23 and the first discharge pipe 13 can slide and be plugged in the up and down directions, not only can the assembly error between the first feed pipe 23 and the first discharge pipe 13 be reduced, but also the influence of the mutual pulling between the first feed pipe 23 and the first discharge pipe 13 on the weighing sensor of the glove box 10 or the temporary storage tank 20 during detection can be reduced, thereby improving the detection accuracy of the weighing sensor, providing a stable and accurate powder supply for the subsequent processes of the powder feeding system 100, and ensuring production consistency and product quality.

[0242] In some embodiments of the present application, Figure 4As shown, the powder feeding system 100 also includes: a first sleeve 61, which is sleeved on the outside of the first feed pipe 23 and the first discharge pipe 13, the upper end of the first sleeve 61 is fixed and sealed to the first discharge pipe 13, the lower end of the first sleeve 61 is fixed and sealed to the first feed pipe 23, and the first sleeve 61 is retractable in the up and down directions.

[0243] “The first sleeve 61 is retractable in the up-down direction” means that the length of the first sleeve 61 in the up-down direction is adjustable. Thus, when the position between the first feed pipe 23 and the first discharge pipe 13 changes relatively, 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.

[0244] In the above technical solution, by arranging the first sleeve 61 to be sleeved on the outer sides of the first feed pipe 23 and the first discharge pipe 13, the first sleeve 61 can be used to seal the connection position between the first feed pipe 23 and the first discharge pipe 13, thereby reducing the probability of leakage at the connection position between the first feed pipe 23 and the first discharge pipe 13, thereby ensuring the sealing performance of the connection position under the premise of realizing the relative sliding of the first feed pipe 23 and the first discharge pipe 13 up and down.

[0245] In some embodiments of the present application, reference Figure 4 The first sleeve 61 cooperates with the first feed pipe 23 and the first discharge pipe 13 to define a first inflation chamber 611, and the first inflation chamber 611 is connected to the first feed pipe 23 and the first discharge pipe 13. A first inflation port that is connected to the first inflation chamber 611 is formed on the first sleeve 61, and the first inflation port is configured to be connected to an air source.

[0246] "The first inflation chamber 611 is connected to the first feed pipe 23 and the first discharge pipe 13" means that the first feed pipe 23 is plug-connected to the first discharge pipe 13, and a first gap channel is formed at the plug-in position between the outer circumferential wall of the inner pipe and the inner circumferential wall of the outer pipe, and the first inflation chamber 611 is connected to the inner space of the pipe defined by the first feed pipe 23 and the first discharge pipe 13 through the first gap channel.

[0247] "The first inflation port is configured to be connected to the air source" means that the first inflation port is connected to the air source through the first inflation pipe. The air source can be dry compressed air or compressed nitrogen. The first inflation pipe is serially connected with the first inflation fan and the first inflation valve. The first inflation valve is located between the outlet of the first inflation fan and the first inflation port. The channel and flow rate of the airflow in the first inflation pipe can be controlled by the first inflation valve.

[0248] When the glove box 10 drops material 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 filled 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 into the temporary storage tank 20 smoothly, reducing the probability of powder leaking from the first gap channel to the first inflation chamber 611.

[0249] In the above technical solution, since a first inflation port connected to an air source is formed on the first sleeve 61, air is inflated into the first inflation cavity 611 through the first inflation port, thereby reducing the probability of powder leakage from the gap between the first feed pipe 23 and the first discharge pipe 13 and improving the sealing performance between the first feed pipe 23 and the first discharge pipe 13.

[0250] In some embodiments of the present application, reference Figure 4 , the first sleeve 61 is a bellows.

[0251] In the above technical solution, since the first sleeve 61 is a bellows, the first sleeve 61 can not only be retracted 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 to reduce the risk of leakage at the connection position, and the bellows has a simple structure and is easy to install.

[0252] In some embodiments of the present application, the first sleeve 61 is a rubber member.

[0253] For example, the first sleeve 61 is a corrugated tube made of rubber and having folds in the length direction.

[0254] 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, so that the first sleeve 61 can have good deformation ability and corrosion resistance.

[0255] In some embodiments of the present application, reference Figure 4 , the wall thickness of the first sleeve 61 is less than or equal to 2 mm.

[0256] 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.

[0257] 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 consumption 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.

[0258] In some embodiments of the present application, the powder feeding system 100 is configured to: when the glove box 10 drops material into the temporary storage tank 20 , gas is introduced into the first inflation chamber 611 through the first inflation port.

[0259] In the above technical solution, since gas is introduced into the first inflation chamber 611 when the glove box 10 drops material into the temporary storage tank 20, the gas in the first inflation chamber 611 can enter the first feeding pipe 23, so that the powder can smoothly fall into the temporary storage tank 20, reducing the probability of powder leaking into the first inflation chamber 611.

[0260] In some embodiments of the present application, reference Figure 4 The ratio of the overlapping length of the first feed pipe 23 and the first discharge pipe 13 in the up-down 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.

[0261] For example, the ratio of the overlapping length of the first feed pipe 23 and the first discharge pipe 13 in the up-down direction to the diameter of the first feed pipe 23 or the first discharge pipe 13 may be 1, 1.1, 1.2, 1.3, 1.4 or 1.5.

[0262] For example, the first feed pipe 23 is sleeved on the outside of the first discharge pipe 13 , and the overlapping length between the first feed pipe 23 and the first discharge pipe 13 in the up-down direction is 1-1.5 times of the diameter of the first feed pipe 23 .

[0263] 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 being separated in the up and down directions, and improve the connection reliability between the first feed pipe 23 and the first discharge pipe 13.

[0264] In the prior art, the discharge pipe of the glove box 10 and the feed pipe of the temporary storage tank 20 have the same diameter and are connected by a hose. However, since the hose connection is airtight, the deformation of the soft connection under the influence of positive or negative pressure will cause pulling on the temporary storage tank 20. Since the effective area of ​​the hose connection is large, for example, the area of ​​the hose in the prior art is usually 132cm 2 and 50cm 2 According to F=PS, under the same pressure difference, the force acting on the weighing sensor of the temporary storage tank 20 is greater.

[0265] In a specific example of the present application, the first feed pipe 23 and the first discharge pipe 13 are connected by a large and small pipe sleeve, and the overlap 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 gap ring S between the large and small pipes is equal to (R 2 -r²)=12cm², that is, the area of ​​action of the pressure in the tube on the first sleeve 61 is 12cm². Among them, through the blanking air pressure optimization program, the air pressure of the first sleeve 61 is the preset weighing pressure during weighing. At the same time, the error of the air pressure (P) is controlled within ±0.1Kpa, F=S×P=0.12N, and the connection position of the first feed pipe 23 and the first discharge pipe 13 causes an error range of about ±12g for weighing the temporary storage tank 20, which meets the requirement of ±50g in this embodiment.

[0266] A first sleeve 61 is arranged outside the connection position between the first feed pipe 23 and the first discharge pipe 13. The first sleeve 61 can reduce the dust particles generated by the shaking of the first feed pipe 23 and the first discharge pipe 13, and when the material is dropped, air is inflated into the first sleeve 61 to prevent the powder from rubbing against the first sleeve 61. Therefore, the thickness of the first sleeve 61 can be greatly reduced. Therefore, the structure of the first sleeve 61 can be optimized to a pleated hose with a thickness of 1 mm, which effectively reduces the stretching of the weighing sensor.

[0267] In some embodiments of the present application, Figure 2 and Figure 5 As shown, 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.

[0268] 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 31 and the second feed pipe 41, and the powder can fall directly 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.

[0269] 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 falling from the screw feeder 30 into the sending tank 40, so that the powder can fall in a timely and quantitative manner to meet the process requirements of powder feeding. At the same time, by connecting the second discharge valve 32 in series to the second discharge pipe 31 and the second feed valve 42 in series to the second feed pipe 41, the sealing performance of the screw feeder 30 and the sending tank 40 can be improved, the probability of external air and impurities entering the screw feeder 30 and the sending tank 40 can be reduced, and the quality of the powder can be guaranteed.

[0270] In the above technical solution, by utilizing gravity to allow the powder in the screw feeder 30 to fall directly into the sending tank 40, no additional power equipment is required to drive the transmission, which can reduce equipment costs, reduce energy consumption, simplify the powder transmission process, and improve transmission efficiency. The powder can be quickly and smoothly transferred from the screw feeder 30 to the sending tank 40. By setting a second feed valve 42 and a second discharge valve 32, the powder can fall into the sending tank 40 according to a predetermined time, a predetermined amount, and a predetermined speed according to process requirements, thereby improving the degree of automation of the production process and meeting the process requirements of feeding.

[0271] In some embodiments of the present application, Figure 5 As shown, the second feed pipe 41 and the second discharge pipe 31 can slide relative to each other in the up and down directions and are plug-connected.

[0272] 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-tuning of the installation position, equipment vibration and sedimentation, etc. This embodiment uses a slidable plug-in connection method for the second feed pipe 41 and the second discharge pipe 31 to automatically adapt to such position changes, ensure the continuity of powder transportation, reduce pipeline damage or loose connections caused by position deviation, and ensure smooth production.

[0273] 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 mutual pulling force between the second feed pipe 41 and the second discharge pipe 31 affects 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 tube, the weighing of the sending tank 40 will be abnormal due to the pressure difference between the inside of the sending tank 40 and the external environment. At the same time, since the soft rubber tube needs to withstand the pressure and the flushing of the powder, the thickness of the soft rubber tube is relatively thick, often more than 5mm. Under the influence of the pressure difference, a large pulling force will be generated on the sending tank 40, which will further lead to inaccurate weighing of the temporary storage tank 20.

[0274] In this embodiment, the second feed pipe 41 and the second discharge pipe 31 are connected in an up and down sliding manner, so that the influence of the mutual pulling between the second feed pipe 41 and the second discharge pipe 31 on the detection of the weighing sensor can be reduced, the detection accuracy of the weighing sensor can be improved, and a stable and accurate powder supply can be provided for the subsequent processes of the powder feeding system 100, thereby ensuring the consistency of production and product quality.

[0275] In the above technical scheme, since the second feed pipe 41 and the second discharge pipe 31 can slide and be plugged in the up and down directions, not only can the assembly error between the second feed pipe 41 and the second discharge pipe 31 be reduced, but also the influence of the mutual pulling between the second feed pipe 41 and the second discharge pipe 31 on the weighing sensor of the sending tank 40 during detection can be reduced, thereby improving the detection accuracy of the weighing sensor, providing a stable and accurate powder supply for the subsequent processes of the powder feeding system 100, and ensuring production consistency and product quality.

[0276] In some embodiments of the present application, Figure 5 As shown, the powder feeding system 100 also includes: a second sleeve 62, which is sleeved on the outside of the second feed pipe 41 and the second discharge pipe 31, the upper end of the second sleeve 62 is fixed and sealed to the second discharge pipe 31, the lower end of the second sleeve 62 is fixed and sealed to the second feed pipe 41, and the second sleeve 62 is 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, the second inflation chamber 621 is communicated with the second feed pipe 41 and the second discharge pipe 31, and 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 an air source.

[0277] “The second sleeve 62 is retractable in the up and down directions” means that the length of the second sleeve 62 in the up and down directions is adjustable. In this way, when the position between the second feed pipe 41 and the second discharge pipe 31 changes relatively, 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 tension between the second feed pipe 41 and the second discharge pipe 31 and ensuring the detection accuracy of the weighing sensor of the sending tank 40.

[0278] "The second inflation chamber 621 is connected to the second feed pipe 41 and the second discharge pipe 31" means that the second feed pipe 41 is plug-connected to the second discharge pipe 31, and a second gap channel is formed at the plug-in position between the outer circumferential wall of the inner pipe and the inner circumferential wall of the outer pipe, and the second inflation chamber 621 is connected to the tube space defined by the second feed pipe 41 and the second discharge pipe 31 through the second gap channel.

[0279] “The second inflation port is configured to be connected to the air source” means that the second inflation port is connected to the air source through the second inflation pipe, and the air source can be dry compressed air or compressed nitrogen. The second inflation pipe is connected in series with a second inflation fan and a second inflation valve, and the second inflation valve is located between the outlet of the second inflation fan and the second inflation port. The second inflation valve can control the channel and flow rate of the airflow in the second inflation pipe. The first inflation fan and the second inflation fan can be the same fan or two independent fans.

[0280] When the screw feeder 30 drops material 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 filled into the second inflation chamber 621 can enter the tube space inside the second feeding pipe 41 through the second gap channel, so that the powder can smoothly fall into the sending tank 40, reducing the probability of powder leaking from the second gap channel to the second inflation chamber 621.

[0281] In the above technical solution, by setting the second sleeve 62 to be sleeved on the outside of the second feed pipe 41 and the second discharge pipe 31, the second sleeve 62 can be used to seal the connection position of the second feed pipe 41 and the second discharge pipe 31, reduce the probability of leakage at the connection position of the second feed pipe 41 and the second discharge pipe 31, and ensure the sealing performance of the connection position. Since the second sleeve 62 is formed with a second inflation port connected to the air source, the second inflation cavity 621 is inflated through the second inflation port, which can reduce the probability of powder leakage from the gap between the second feed pipe 41 and the second discharge pipe 31, and improve the sealing performance between the second feed pipe 41 and the second discharge pipe 31.

[0282] In some embodiments of the present application, reference Figure 5 The second sleeve 62 is a bellows. Not only can the second sleeve 62 be retractable in the up-down direction to adapt to the relative displacement between the second feed pipe 41 and the second discharge pipe 31, but also it can have a good sealing performance, reduce the risk of leakage at the connection position, and the bellows has a simple structure and is easy to install.

[0283] In some embodiments of the present application, the second sleeve 62 is a rubber member. For example, the second sleeve 62 is a corrugated tube made of rubber and having folds in the length direction. Since the rubber member has good deformability, chemical stability and wear resistance, the second sleeve 62 can have good deformation ability and corrosion resistance.

[0284] 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 or 2 mm, etc. In this way, not only the material consumption of the second sleeve 62 can be reduced, the weight of the second sleeve 62 can 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, thereby improving the detection accuracy of the weighing sensor.

[0285] In some embodiments of the present application, the powder feeding system 100 is configured as follows: when the screw feeder 30 drops the material into the sending tank 40, gas is introduced into the second gas filling cavity 621 through the second gas filling port. Thus, the gas introduced into the second gas filling cavity 621 can enter the interior of the second feeding pipe 41, so that the powder can smoothly fall into the sending tank 40, reducing the probability of the powder leaking into the second gas filling cavity 621.

[0286] In some embodiments of the present application, reference Figure 5 The ratio of the overlapping length of the second feed pipe 41 and the second discharge pipe 31 in the up-down direction to the diameter 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.

[0287] For example, the ratio of the overlap length of the second feed pipe 41 and the second discharge pipe 31 in the vertical direction to the diameter 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 on the outside of the second discharge pipe 31, and the overlap 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.

[0288] In this way, 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 being separated in the up and down directions, thereby improving the connection reliability between the second feed pipe 41 and the second discharge pipe 31.

[0289] Secondly, an embodiment of the present application further provides a production system 1000, comprising a powder feeding system 100 and a pulping system 800 according to any one of the above embodiments, wherein the pulping system 800 comprises a pulping tank 80, and an outlet of the sending tank 40 is connected to a powder inlet of the pulping tank 80.

[0290] The slurry tank 80 is a container with a stirring chamber, which is used to mix and stir various raw materials to generate slurry with specific properties.

[0291] In the above technical scheme, since the production system 1000 is provided with the above-mentioned powder feeding system 100, 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 transported to the sending tank 40 through the screw feeder 30, which can not only realize the automatic transportation of the powder in the temporary storage tank 20 to the sending tank 40, but also can accurately measure the weight of the powder to be dosed to the sending tank 40, thereby realizing highly automated batching of the powder and improving the batching efficiency.

[0292] In some embodiments of the present application, 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 .

[0293] For example, the number of the pulping tanks 80 may be two, three, four, five, six, seven, eight or more, and so on.

[0294] In the above technical solution, multiple pulping tanks 80 are connected to the sending tank 40, so that one sending tank 40 can feed 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.

[0295] In a third aspect, an embodiment of the present application further provides a control method for a powder feeding system 100 of any of the above-mentioned embodiments, the control method comprising: S11, confirming receipt of a batching instruction for conveying powder to a sending tank 40; S12, controlling the screw feeder 30 to convey a first target weight of powder from a temporary storage tank 20 to the sending tank 40.

[0296] The powder material 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 material feeding system 100 and to control the automatic production process of the production system 1000 .

[0297] S11, confirming receipt of a batching instruction for conveying powder to the sending tank 40. For example, when it is detected that there is no powder in the sending tank 40, or the amount of powder is less than a preset amount, the control system issues a batching instruction for conveying powder to the sending tank 40. For another example, when a certain pulping tank 80 of the pulping system 800 needs to be fed with powder, the pulping system 800 issues a batching request to the powder feeding system 100. At this time, the control system may 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 conveying of powder to the sending tank 40.

[0298] S12, controlling the screw feeder 30 to deliver the first target weight of powder from the temporary storage tank 20 to the sending tank 40. Since the delivery amount of the powder in the pulping system 800 affects the proportion of the slurry, and further affects the quality of the slurry, when delivering the powder to the sending tank 40, not only the delivery of the powder is controlled, but also the weight of the delivered powder needs to be accurately controlled to ensure the product quality of the subsequent process.

[0299] In the above technical scheme, the powder feeding system 100 confirms that it has received the batching instruction to convey the powder to the sending tank 40; then it controls the screw feeder 30 to convey the first target weight of powder from the temporary storage tank 20 to the sending tank 40. Therefore, not only can the screw feeder 30 realize automatic conveying of the powder, but also the conveying amount of the powder can be accurately controlled, and then the amount of powder conveyed from the sending tank 40 to the pulping system 800 can be accurately controlled. Compared with the batching method of manual weighing and then feeding the powder in fixed packages into the glove box 10, 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.

[0300] In some embodiments of the present application, 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 conveyed 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, and the second speed is less than the first speed.

[0301] In this embodiment, the screw feeder 30 first rotates at a first speed to feed the material, and then rotates at a 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 increase the batching speed and improve the batching efficiency, and then reduces the rotation speed to batch the material, so as to achieve precise batching.

[0302] It should be noted that the first preset weight is a pre-set value. Confirming that the weight of the delivered powder has reached the first preset weight means that the weight of the remaining undosed powder is less than the set value. At this time, the weight of the remaining powder is small. If the ingredients are dosed in a high-speed rotating manner, the dosing weight may easily exceed the first target weight, resulting in inaccurate dosing.

[0303] In the above technical solution, the screw feeder 30 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 reduced second speed. This not only achieves rapid ingredient batching, but also facilitates accurate ingredient batching.

[0304] In some embodiments of the present application, 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.

[0305] S124, gas is introduced into the temporary storage tank 20 to purge the temporary storage tank 20 and the screw feeder 30. For example, the second dust removal fan connected to the temporary storage tank 20 is controlled to start, the second dust removal valve 522 on the second air pipe 521 connected in series between the second dust removal fan and the temporary storage tank 20 is opened, and compressed nitrogen gas of a certain pressure is introduced into the temporary storage tank 20, so that the powder remaining on the inner wall of the temporary storage tank 20 and the screw feeder 30 can flow to the sending tank 40 driven by the dust removal gas, so as to ensure that the powder in the temporary storage tank 20 and the screw feeder 30 can completely enter the sending tank 40.

[0306] S125, confirming that the weight of the powder material that has been delivered reaches the first target weight. For example, the weight of the temporary storage tank 20 can be detected by a weighing sensor, and the actual weight of the powder material delivered by the temporary storage tank 20 to the sending tank 40 can be obtained by calculation. Specifically, before the temporary storage tank 20 delivers the powder material to the sending tank 40 through the screw feeder 30, the weight of the temporary storage tank 20 is first obtained. After the temporary storage tank 20 delivers the powder material to the sending tank 40 through the screw feeder 30, the weight of the temporary storage tank 20 is obtained again. The difference between the two weights of the temporary storage tank 20 is the actual weight of the powder material delivered by the temporary storage tank 20 to the sending tank 40 through the screw feeder 30. When the actual weight is equal to the first target weight, the delivery is completed. When the actual weight is less than the first target weight, it means that part of the powder material has not been delivered. When the actual weight is greater than the first target weight, it means that the weight of the delivered powder material is excessive.

[0307] In the above technical scheme, after the powder is conveyed to the sending tank 40 through the screw feeder 30, the temporary storage tank 20 and the screw feeder 30 are purged until the powder conveyed to the sending tank 40 reaches the first target weight. In this way, not only can the powder of a predetermined weight be accurately conveyed, but the probability of the powder adhering to the temporary storage tank 20 and the screw feeder 30 can also be reduced, thereby increasing the service life of the temporary storage tank 20 and the screw feeder 30, reducing the waste of powder, and reducing the risk of powder contacting operators.

[0308] In some embodiments of the present application, 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 conveying gas into the sending tank 40 to convey the powder in the sending tank 40 to the pulping system 800.

[0309] 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. The sending tank 40 can deliver the powder to the pulping system 800 by positive pressure delivery.

[0310] In some examples, after receiving a 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, the third dust removal fan connected to the sending tank 40 is controlled to start, and 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 is opened. The third dust removal valve 532 can be an air butterfly valve, and compressed nitrogen of a certain pressure is introduced into the sending tank 40. The powder in the sending tank 40 is blown to the pulping system 800 through the pipeline under the vibration of the vibrator and the entrainment of the compressed nitrogen. 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 compressed nitrogen into the sending tank 40, the powder and compressed nitrogen can be premixed, thereby improving the powder conveying efficiency and the subsequent pulping efficiency of the pulping system 800.

[0311] Refer to the following Figure 6 and Figure 7 The control method of the powder feeding system 100 according to the fourth embodiment of the present application is described. Figure 6 is a control flow chart of the powder feeding system 100 when shaking and cleaning the glove box 10 according to an embodiment of the present application, Figure 7 1 is a control flow chart of the powder feeding system 100 according to an embodiment of the present application when purging the glove box 10. The glove box 10 includes a box body 11 and a first liner 12 disposed in the box body 11.

[0312] Reference Figure 6 According to the control method of the powder feeding system 100 of the fourth embodiment of the present application, the method includes: S21, confirming that the glove box 10 has completed the feeding into the temporary storage tank 20; S22, driving the first liner 12 to vibrate; S23, purging the inner wall of the glove box 10.

[0313] That is to say, after confirming that the emptying of the glove box 10 is completed, the liner shaking function of the glove box 10 is started first, so that the residual powder adhering to the first liner 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 turned on alternately to make the pressure in the first gap space 102 change repeatedly to drive the first liner 12 to shake. After the first liner 12 shakes for a certain period of time, the blowing function of the glove box 10 is started.

[0314] Among them, the shaking duration of the first lining 12 can be 10s-100s. For example, the first lining 12 can be shaken continuously for 10s, 15s, 20s, 25s, 30s, 35s, 40s, 45s, 50s, 55s, 60s, 65s, 70s, 75s, 80s, 85s, 90s, 95s or 100s.

[0315] When the blowing function of the glove box 10 is started, the first dust removal fan connected to the glove box 10 can be started, and the first dust removal valve 512 connected in series to the first air pipe 511 connected between the first dust removal fan and the glove box 10 can be opened. The time for blowing the inner wall of the glove box 10 can be a set time, and it can also 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 dropped from the glove box 10 into the temporary storage tank 20 reaches a preset drop value.

[0316] In some examples, a plurality of first dust removal valves 512 may be connected in series to the first air pipe 511 . The first dust removal valve 512 may be an explosion-proof solenoid valve or a pressure regulating valve. The pressure regulating valve may be used to adjust the pressure of gas blown into the glove box 10 .

[0317] In the above technical scheme, after confirming that the glove box 10 has been completely emptied, the first liner 12 is first driven to vibrate so that the powder adhering to the first liner 12 falls into the temporary storage tank 20, and then the inner wall of the glove box 10 is purged to further clean the residual powder in the glove box 10. In this way, the residual powder in the glove box 10 can be reduced, the powder loss can be reduced, and the health risks of the operators caused by contact with the powder can be reduced.

[0318] Reference Figure 6 Combined 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 lining 12, and step S22 includes: S221, introducing gas into the first gap space 102, and continuing for a first preset time; S222, sucking the gas in the first gap space 102, and continuing 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 the second target weight, if so, the dropping of the powder ends, if not, executing S221.

[0319] For example, in step S221, a gas of a first preset pressure may be introduced into the first gap space 102 for a first preset time. The first preset time may be 2s-10s, for example, the first preset time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s or 11s, etc. The first preset pressure may be 3kPa-15kPa, for example, the first preset pressure may be 3kPa, 4kPa, 5kPa, 6kPa, 7kPa, 8kPa, 9kPa, 10kPa, 11kPa, 12kPa, 13kPa or 14kPa, etc.

[0320] For example, in step S222, the gas in the first gap space 102 may be sucked at a second preset pressure for a second preset time. In some examples, the second preset time may be 2s-10s, for example, the second preset time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s, or 11s, etc. The second preset pressure may be -3kPa to -15kPa, for example, the second preset pressure may be -3kPa, -4kPa, -5kPa, -6kPa, -7kPa, -8kPa, -9kPa, -10kPa, -11kPa, -12kPa, -13kPa, or -14kPa, etc.

[0321] The ventilation into the first interstitial space 102 or the stopping of ventilation can be controlled by opening and closing the air inlet valve connected in series to the connecting pipe between the first blower and the first interstitial space 102. The vacuum valve connected in series to the connecting pipe between the first vacuum pump and the first interstitial space 102 can be opened and closed to control whether the first interstitial space 102 is evacuated.

[0322] In step S223, when the weight of the powder dropped from the glove box 10 to the temporary storage tank 20 reaches the second target weight, it means that all the powder dropped into the glove box 10 has dropped into the sending tank 40. At this time, even if there is powder left in the glove box 10, the residual amount of the powder is within a reasonable error range, indicating that the glove box 10 has completed all the dropping. When the weight of the powder dropped from the glove box 10 to the temporary storage tank 20 is less than the second target weight, it means that part of the powder dropped into the glove box 10 has not dropped into the sending tank 40. At this time, the residual amount of the powder in the glove box 10 is too much and exceeds the reasonable error range, and the shaking function of the first liner 12 needs to be restarted to continue to shake off the residual powder on the first liner 12.

[0323] In the above technical scheme, by first introducing gas into the first gap space 102 and then sucking the gas in the first gap space 102, the first lining 12 can be shaken to shake off the powder adhering to the first lining 12, and then the weight of the powder falling into the temporary storage tank 20 from the glove box 10 is detected to determine the residual amount of powder in the glove box 10, and then determine whether the powder in the glove box 10 is completely shaken off. In this way, it can be ensured that the powder in the glove box 10 falls completely into the temporary storage tank 20.

[0324] Reference 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: determining whether the total running time of step S22 is greater than the third preset time, if not, executing S221, and if so, issuing an alarm message of material dropping timeout.

[0325] The “total running time of step S22” refers to the total running time of driving the first liner 12 to vibrate, wherein the total running time of driving the first liner 12 to vibrate includes not only the actual vibration time of the first liner 12, but also the interval time between two vibrations of the first liner 12. For example, the timing can be started from the start of the vibration of the first liner 12, and each time the weight of the powder falling into the temporary storage tank 20 is measured, the vibration time of the first liner 12 is read once, that is, the total running time of step S22 at the current time.

[0326] The third preset time can be set in advance. For example, the third preset time can be set according to the preset vibration amplitude and frequency of the first lining 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 lining 12 is long enough, which is sufficient to shake all the powder adhered to the first lining 12 into the temporary storage tank 20 under normal circumstances.

[0327] 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 cleaning time for the first lining 12 is not enough, and powder is still adhered to the first lining 12. It is necessary to continue to vibrate the first lining 12 and continue to shake off the powder on the first lining 12 to achieve complete falling of the powder.

[0328] 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 conditions, resulting in the failure of the material dropping to be completed smoothly. At this time, an alarm message can be issued to notify the operator that the material dropping has timed out and there may be an abnormality in the glove box 10 or the temporary storage box.

[0329] In the above technical solution, when the weight of the powder 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 dropping timeout is issued to remind the operator that the material dropping is abnormal, thereby reducing the occurrence of the first lining 12 vibrating for dust removal because the weight of the powder falling into the temporary storage tank 20 does not reach the second target weight.

[0330] Reference 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 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 determining whether the pressure in the glove box 10 is less than a second preset pressure, the second preset pressure is less than the first preset pressure, if so, ending the purge, if not, executing S232.

[0331] 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 open, and detecting and confirming that the first feed valve 24 on the first feed pipe 23 of the temporary storage tank 20 is open.

[0332] In step S231, the pressure in the glove box 10 may be detected by a pressure detection sensor, and then it is determined whether the current pressure of the glove box 10 is less than a first preset pressure, wherein the first preset pressure may be set as a positive pressure greater than 0 kPa. For example, the first preset pressure may be 1 kPa.

[0333] S232, a purge gas is introduced into the glove box 10. For example, the first dust removal fan connected to the glove box 10 is controlled to start, 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 is opened, and compressed nitrogen gas of a certain pressure is introduced into the glove box 10, so that the powder remaining on the inner wall of the glove box 10 can flow to the temporary storage tank 20 driven by the dust removal gas.

[0334] In some examples, in step S233, the first time may be 2s-10s. For example, the first time may be 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s.

[0335] It should be noted that during the purging process of the glove box 10, since gas at a certain pressure is introduced into the glove box 10, the pressure in the glove box 10 will gradually increase as the purging progresses. When the pressure in the glove box 10 is too high and lasts too long, the gloves in the glove box 10 will be pressed out of the box body 11, affecting the normal operation of the glove box 10.

[0336] 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. In this way, the risk of excessive pressure in the glove box 10 can be reduced.

[0337] In step S235 , the second preset pressure may 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.

[0338] After closing the first dust removal valve 512, 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, so that the pressure in the glove box 10 is reduced. After a certain period of time after closing the first dust removal valve 512, the pressure in the glove box 10 is detected again. If the pressure in the pressure 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. When the pressure in the glove box 10 is positive pressure, it is not conducive to maintaining the normal operation of the glove box 10. At this time, the glove box 10 is purged again to drive the gas in the glove box 10 to flow to the temporary storage tank 20, which not only realizes the re-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, so that the glove box 10 is kept in a negative pressure state, so that the glove box 10 can work normally.

[0339] 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 the pressure in the glove box 10 can also be kept in a negative pressure state after purging to ensure the normal operation of the glove box 10.

[0340] In some embodiments of the present application, 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 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, execute S2313, if the pressure in the glove box 10 is greater than the third preset pressure and less than the first preset pressure, execute S232; S2313, turn off the dust removal fan 50 connected to the glove box 10, and open 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, execute S232.

[0341] In some examples, the third preset pressure may be set to a negative pressure less than 0 kPa. For example, the third preset pressure may be -1 kPa.

[0342] In this embodiment, after starting the purge procedure in the glove box 10, the pressure in the glove box 10 is first detected and determined, and according to the pressure value in the glove box 10, it is determined whether to open 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 material discharge into the temporary storage tank 20, when the pressure in the glove box 10 is low, lower than the third preset pressure, in order to avoid the glove box 10 pressure 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 of the gas source can also be passed into the glove box 10 through the first air pipe 511 and the first dust removal valve 512, and the pressure in the glove box 10 is slowly increased. When it is detected that the pressure in the glove box 10 is positive, the purge gas can be passed into the glove box 10.

[0343] In the above technical solution, when the pressure in the glove box 10 is lower than the third preset pressure, the first dust removal blower is not turned on, and only the first dust removal valve 512 is turned on, so as to increase the pressure in the glove box 10 and reduce the situation where the pressure in the glove box 10 is too low due to direct blowing of the glove box 10, thereby ensuring that the glove box 10 can operate normally.

[0344] Refer to the following Figure 8 The control method of the powder feeding system 100 according to the fifth embodiment of the present application is described below. Figure 8 It is a control flow chart of the powder material 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; Reference Figure 8 The control method of the powder feeding system 100 of the fifth embodiment of the present application includes: 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 the first weight; S34, controlling the temporary storage tank 20 to feed materials to the sending tank 40; S35, obtaining the weight of the temporary storage tank 20 after feeding materials as the second weight; S36, confirming that the difference between the second weight and the initial weight is within a preset range; S37, the feeding is completed, wherein 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.

[0345] It should be noted that when both the feed pipe and the discharge pipe of the temporary storage tank 20 are softly connected (the first sleeve 61 and the second sleeve 62), in order to eliminate the pulling of the soft connection on the weighing sensor, 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, but because the powder feeding system 100 is not connected to the external environment, this condition cannot be met; 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 positive pressure, this condition is also difficult to meet. Therefore, in order to minimize the influence of the soft connection (the first sleeve 61 and the second sleeve 62) on the pulling of the weighing sensor, the easier solution is to keep the pressure difference between equipment and equipment, and between the system and the environment constant, and complete the feeding under a constant pressure difference.

[0346] That is, since the first storage chamber 101 of the glove box 10, the second storage chamber 201 of the temporary storage tank 20 and the third storage chamber 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 for detecting the weights of the glove box 10, the temporary storage tank 20 and the sending tank 40 are also different. Therefore, in order to improve the detection accuracy of the weight of the temporary storage tank 20, when the weight of the temporary storage tank 20 is detected, the pressure inside the temporary storage tank 20 is adjusted to the same pre-set pressure value, for example, adjusted to a preset weighing pressure, so that the weighing error caused by the different internal pressures of the temporary storage tank 20 can be significantly reduced.

[0347] In some examples, the preset weighing pressure may be a negative pressure, specifically, the preset weighing pressure may be -3 kPa to -10 kPa. For example, the preset weighing pressure may be -3 kPa, -4 kPa, -5 kPa, -6 kPa, -7 kPa, -8 kPa, -9 kPa or -10 kPa.

[0348] In step S31, before feeding the powder material feeding system 100 to the pulping system 800 each time, the initial weight of the temporary storage tank 20 can be obtained so as to accurately measure the feeding amount each time.

[0349] In step S32, the glove box 10 is controlled to drop materials into the temporary storage tank 20, including: opening the first discharge valve 14 of the glove box 10 and the first feed valve 24 of the temporary storage tank 20, so that the powder in the glove box 10 falls into the temporary storage tank 20 under the action of gravity, and then confirming that the glove box 10 has completed dropping materials into the temporary storage tank 20 (refer to the aforementioned step S21); driving the first liner 12 to vibrate (refer to the aforementioned step S22); and purging the inner wall of the glove box 10 (refer to the aforementioned step S23).

[0350] Next, in step S33, the weight of the temporary storage tank 20 is obtained again under the preset weighing pressure condition. At this time, the weight of the temporary storage tank 20 is the first weight, wherein the first weight minus the initial weight is the weight of the powder transported into the temporary storage tank 20 by the glove box 10 this time.

[0351] In step S34, the screw feeder 30 is started to transport the powder in the temporary storage tank 20 to the sending tank 40. After the transportation is completed, the pressure of the temporary storage tank 20 is readjusted to the preset weighing pressure, and the second weight of the temporary storage tank 20 is obtained. At this time, the first weight minus the second weight is the weight of the powder transported from the temporary storage tank 20 to the sending tank 40 this time, that is, the weight of the powder that the powder feeding system 100 is about to transport to the pulping system 800 this time.

[0352] Among them, the initial weight is the weight of the temporary storage tank 20 when the powder is not put into the temporary storage tank 20, and the second weight is the weight of the temporary storage tank 20 after the powder dropped from the glove box 10 into the temporary storage tank 20 is transported to the sending tank 40. That is to say, under normal circumstances, the initial weight and the second weight do not include the weight of the powder, and are both the weight of the temporary storage tank 20 itself. Therefore, when the powder is completely transported 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 accuracy 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 transported and put into the sending tank 40.

[0353] In the above technical scheme, the weight of the temporary storage tank 20 under the preset weighing pressure is obtained before and after the temporary storage tank 20 is dropped and after the temporary storage tank 20 feeds the sending tank 40, which can significantly reduce the weighing error caused by the different internal pressures of the temporary storage tank 20, thereby accurately measuring the weight of the powder delivered from the glove box 10 to the sending tank 40, and can also monitor and reduce the adhesion of the powder in the glove box 10 and the temporary storage tank 20 to the maximum extent during the entire conveying process of the powder feeding system 100, thereby reducing the loss of powder.

[0354] In some examples, the weighing sensor used to weigh the weight of the temporary storage tank 20 needs to be calibrated to zero point. Specifically, the first discharge valve 14 of the glove box 10 is closed, the first feed valve 24 of the temporary storage tank 20 is opened, the second discharge valve 32 of the temporary storage tank 20 is opened, and the second feed valve 42 of the sending tank 40 is closed, and the pressure of the temporary storage tank 20 is adjusted to -5kPa for zero point correction; when the pressure value of the temporary storage tank 20 becomes 0, the weight of the temporary storage tank 20 is theoretically displayed to be about 3.5kg, but the actual value cannot be calculated because the soft connection (the first sleeve 61 and the second sleeve 62) will be deformed.

[0355] In some embodiments of the present application, step S31 includes: S311, introducing 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 a 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 feeding system 100.

[0356] In step S311, an inert gas is introduced into the temporary storage tank 20 to replace the air in the temporary storage tank 20, so that the temporary storage tank 20 is filled with the inert gas. When the glove box 10 drops the powder into the temporary storage tank 20, the contact between the powder and the water vapor or oxygen in the air can be reduced, the generation of dangerous gases can be reduced, the risk of accidents in the temporary storage tank 20 can be reduced, and the risk of the performance of the powder in the temporary storage tank 20 being changed can be reduced. The inert gas can be nitrogen.

[0357] Since the first feed pipe 23 and the first discharge pipe 13 are plugged and can slide up and down relatively, and the first connection position of the first feed pipe 23 and the first discharge pipe 13 is sleeved with a retractable first sleeve 61 outside, the first sleeve 61 is located between the first feed valve 24 and the first discharge valve 14. In order to reduce the influence of the pulling force of the connection position of the first feed pipe 23 and the first discharge pipe 13 on the weighing of the temporary storage tank 20, when the temporary storage tank 20 is weighed, the first sleeve 61 can be connected with the temporary storage tank 20 and be under the same pressure condition, so that the influence of the connection position on the weighing accuracy of the temporary storage tank 20 can be minimized.

[0358] Since the second feed pipe 41 and the second discharge pipe 31 are plugged and can slide up and down relatively, and the outer side of the second connection position of the second feed pipe 41 and the second discharge pipe 31 is sleeved with a retractable second sleeve 62, the second sleeve 62 is located between the second feed valve 42 and the second discharge valve 32. In order to reduce the influence of the pulling force of the connection position of the second feed pipe 41 and the second discharge pipe 31 on the weighing of the temporary storage tank 20, when the temporary storage tank 20 is weighed, the second sleeve 62 and the temporary storage tank 20 can be connected and under the same pressure conditions, so that the connection position can minimize the influence of the weighing accuracy of the temporary storage tank 20.

[0359] Therefore, when weighing the temporary storage tank 20, the first discharge valve 14 of the glove box 10 is closed, the first feed valve 24 of the temporary 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 temporary storage tank 20 is opened. This 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 temporary storage tank 20, thereby improving the weighing accuracy of the temporary storage tank 20.

[0360] In the above technical solution, by replacing the air in the temporary storage tank 20 with an inert gas, the contact between the powder and the water vapor or oxygen in the air can be reduced, the generation of dangerous gases can be reduced, and the risk of the performance of the powder changing in the temporary storage tank 20 can be reduced. At the same time, before weighing the temporary storage tank 20, the first discharge valve 14 of the glove box 10 is closed and the first feed valve 24 of the temporary storage tank 20 is opened, which can reduce the influence of the first connection position of the first feed pipe 23 and the first discharge pipe 13 on the pulling force of the temporary storage tank 20, thereby improving the weighing accuracy of the temporary storage tank 20.

[0361] In some embodiments of the present application, step S33 includes: S331, confirming that the material discharge from the glove box 10 to the temporary storage tank 20 is completed; S332, closing the first discharge valve 14 of the glove box 10; S333, adjusting the air pressure in the temporary storage tank 20 to a 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.

[0362] In the above technical solution, it is possible to obtain the current weight of the temporary storage tank 20 again under the preset weighing pressure condition, thereby reducing the influence of the glove box 10 on the weighing of the temporary storage tank 20 .

[0363] In some embodiments of the present application, step S34 includes: S341, adjusting the pressure in the sending tank 40 to a 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 sending tank 40.

[0364] In this embodiment, the pressure of the sending tank 40 is adjusted to a preset weighing pressure, so that the pressure in the sending tank 40 can be consistent with the pressure in the temporary storage tank 20, which is beneficial for conveying the powder in the temporary storage tank 20 to the sending tank 40, reducing the conveying resistance and improving the conveying stability and efficiency.

[0365] The specific process of step S344 controlling the screw feeder 30 to feed the sending tank 40 can be parameterized by the aforementioned step S12, that is, step S344 may include: S121, controlling the screw feeder 30 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 30 to rotate at a second speed to convey the powder, and the second speed is less than the first speed; 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 conveyed powder reaches the first target weight.

[0366] In the above technical solution, the pressure of the sending tank 40 is adjusted to the preset weighing pressure, so that the pressure in the sending tank 40 can be consistent with the pressure in the temporary storage tank 20, which is beneficial to transport the powder in the temporary storage tank 20 to the sending tank 40, reduce the transportation resistance, and improve the transportation stability and efficiency.

[0367] In some embodiments of the present application, step S35 includes: S351, driving the second 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 continues to remain 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.

[0368] In step S351, the second lining of the temporary storage tank 20 is driven to vibrate, including: S3511, introducing gas into the second gap space and continuing for a third preset time; S3512, sucking the gas in the second gap space and continuing for a fourth preset time; S3513, repeating S3511 and S3512.

[0369] The third preset time may be 2s-10s, for example, the third preset time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The pressure of the gas introduced into the second gap space may be a third preset pressure, and the third preset pressure may be 3kPa-15kPa, for example, the third preset pressure may be 3kPa, 4kPa, 5kPa, 6kPa, 7kPa, 8kPa, 9kPa, 10kPa, 11kPa, 12kPa, 13kPa or 14kPa, etc.

[0370] In some examples, the gas in the second gap space may be sucked at a fourth preset pressure for a fourth preset time. The fourth preset time may be 2s-10s, for example, the fourth preset time may be 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, etc. The fourth preset pressure may be -3kPa to -15kPa, for example, the fourth preset pressure may be -3kPa, -4kPa, -5kPa, -6kPa, -7kPa, -8kPa, -9kPa, -10kPa, -11kPa, -12kPa, -13kPa or -14kPa, etc.

[0371] The ventilation into the second gap space or the stopping of the ventilation can be controlled by opening and closing the second air inlet valve connected in series on the third pipeline between the second blower and the second gap space. Whether the second gap space is evacuated can be controlled by opening and closing the second vacuum valve connected in series on the fourth pipeline between the second vacuum pump and the second gap space.

[0372] Purging the temporary storage tank 20 may include: controlling and starting a second dust removal fan connected to the temporary 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 temporary storage tank 20, and introducing compressed nitrogen of a certain pressure into the temporary storage tank 20, so that the powder remaining on the inner wall of the temporary storage tank 20 and the screw feeder 30 can flow to the sending tank 40 driven by the dust removal gas, thereby ensuring that the powder in the temporary storage tank 20 and the screw feeder 30 can completely enter the sending tank 40.

[0373] In some examples, it is confirmed that the current weight of the temporary storage tank 20 remains unchanged for a first time, wherein the first time may be 15s-50s, for example, the first time may be 15s, 20s, 25s, 30s, 35s, 40s, 45s or 50s, etc.

[0374] In step S353, when weighing the temporary storage tank 20, the first discharge valve 14 of the glove box 10 is closed, the first feed valve 24 of the temporary 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 temporary storage tank 20 is opened. In this way, the influence of the pulling force of 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 temporary storage tank 20 can be reduced, and the weighing accuracy of the temporary storage tank 20 can be improved.

[0375] In the above technical scheme, by vibrating and purging the temporary storage tank 20, the powder residue in the temporary storage tank 20 can be reduced. When weighing the temporary storage tank 20, the first feed valve 24 and the second discharge valve 32 are opened and the first discharge valve 14 and the second feed valve 42 are closed. The pulling force of 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 temporary storage tank 20 can be reduced, thereby improving the weighing accuracy of the temporary storage tank 20.

[0376] In some embodiments of the present application, step S36 includes: comparing the second weight with the initial weight, and when the difference between the second weight and the initial weight is within a preset range, executing S37; when the difference between the second weight and the initial weight exceeds the preset range, closing the first feed valve 24 of the temporary storage tank 20, opening the second feed valve 42 of the sending tank 40, and then re-executing step S35.

[0377] 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 delivered, for example, the preset range can be ±1% of the total weight of the powder delivered. In other examples, the preset range of the difference can be a certain numerical range, for example, the preset range can be ±50g.

[0378] When the difference between the second weight and the initial weight exceeds the preset range, it means that some powder has not been put into the sending tank 40, and the process of putting the powder into the sending tank 40 has not been completed. There is still a lot of powder remaining in the temporary storage tank 20 and / or the screw feeder. At this time, the temporary storage tank 20 and the screw feeder need to be shaken clean and purged for dust removal again.

[0379] In the above technical solution, it can be accurately determined whether the powder dropped into the temporary storage tank 20 by the glove box 10 is completely transported to the sending tank 40, thereby reducing the adhesion of the powder in the temporary storage tank 20 and reducing the loss of powder.

[0380] The following will refer to Figure 1-Figure 5 A production system 1000 according to a specific embodiment of the present application is described.

[0381] Reference Figure 1 The production system 1000 of this embodiment is a battery production system 1000, and the production system 1000 includes a powder feeding system 100 and a slurry making system 800. The slurry making system 800 is connected downstream of the powder feeding system 100. The slurry making system 800 is used to prepare slurry for coating the pole pieces, and the powder feeding system 100 is used to transport the powdered raw materials required for preparing the slurry to the slurry making system 800.

[0382] Specifically, Figure 1 As 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, and the first discharge pipe 13 is connected in series with a first discharge valve 14. The top of the temporary storage tank 20 is connected with a first feed pipe 23 extending upward, and the first feed pipe 23 is connected in series with a first feed valve 24. The first feed pipe 23 is plugged into the first discharge pipe 13, and the outer sleeve of the plug-in position is provided with a first sleeve 61, which is a bellows that can be telescoped up and down.

[0383] 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 to a second discharge pipe 31 extending downward, the second discharge pipe 31 is connected in series with a second discharge valve 32, the top of the sending tank 40 is connected to a second feed pipe 41 extending upward, the second feed pipe 41 is connected in series with a second feed valve 42, the second feed pipe 41 is plugged into the second discharge pipe 31, and the outer sleeve of the plug-in position is provided with a second sleeve 62, the second sleeve 62 is a bellows that can be telescoped up and down.

[0384] The powder feeding system 100 also 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, and the first air pipe 511 is connected in series with a first dust removal valve 512. 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, and the second air pipe 521 is connected in series with a second dust removal valve 522. The third air pipe 531 is connected between the dust removal fan 50 and the third storage chamber 401 of the sending tank 40, and the third air pipe 531 is connected in series with a third dust removal valve 532. The third dust removal valve 532 can be an air butterfly valve.

[0385] The glove box 10 includes a box body 11 and a first liner 12. The first liner 12 is a fluororubber part and is arranged in the box body 11, and defines a first storage cavity 101. A first gap space 102 is formed between the first liner 12 and the box body 11. The powder feeding system 100 also includes a first fan and a first vacuum pump. The first fan is connected to the first gap space 102 through a first pipe, and a first air intake valve is connected in series to the first pipe. The first vacuum pump is connected to the first gap space 102 through a second pipe, and a first vacuum valve is connected in series to the second pipe.

[0386] The temporary storage tank 20 includes a tank body and a second liner, the second liner is a fluororubber part and is arranged in the tank body, and defines a second storage cavity 201, and a second gap space is formed between the second liner and the tank body. The powder feeding system 100 also includes a second fan and a second vacuum pump, the second fan is connected to the second gap space through a third pipe, and a second air intake valve is connected in series to the third pipe. The second vacuum pump is connected to the second gap space through a fourth pipe, and a second vacuum valve is connected in series to the fourth pipe.

[0387] The sending tank 40 is provided with a vibration exciter for driving the sending tank 40 to vibrate. Among them, the glove box 10, the temporary storage tank 20 and the sending tank 40 are all provided with a pressure sensor for detecting pressure and a weighing sensor for weighing.

[0388] 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 .

[0389] Refer to the following Fig. 9 Combined with Figure 6-Figure 8 The overall workflow of the production system 1000 of this embodiment is described. Fig. 9 is a feeding flow chart of the powder feeding system 100 according to an embodiment of the present application.

[0390] The bagged powder is transported to the material placement area of ​​the glove box 10. The equipment code, asset number, and powder package PN code are verified by a barcode scanner. If the three codes are verified to be correct, the electronic lock of the glove box 10 door is opened, the door of the glove box 10 is opened manually, the materials are placed, and the door of the glove box 10 is closed. The gloves are unpacked through the glove box 10. After the unpacking is completed, the packages are transferred to the waste bag box, and the control system is manually operated externally to start the glove box 10 to drop materials into the temporary storage tank 20.

[0391] After the glove box 10 has finished dropping materials into the temporary storage tank 20, the shaking function of the first liner 12 of the glove box 10 is started to make the sticky powder fall 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.

[0392] Open the second discharge valve 32 and the second feed valve 42, and convey the powder in the temporary storage tank 20 to the sending tank 40 through the screw feeder to achieve precise batching. Specifically, first, the screw feeder 30 rotates at high speed to quickly batch; when the weight of the remaining powder is less than a certain set value, the screw feeder 30 slows down to achieve precise batching; then, introduce compressed nitrogen to purge the temporary storage tank 20 and the screw feeder 30, so that the residual powder on the temporary storage tank 20, the screw feeder 30 and the pipe wall is purged into the sending tank 40, achieving the effect of cleaning the pipe and precise weighing, until the weighing sensor of the temporary storage tank 20 continuously detects that the weight in the tank reaches a reasonable error within the set weight, that is, the batching action from the temporary storage tank 20 to the sending tank 40 is completed.

[0393] After the powder feeding system 100 and the pulping system 800 have mutually judged the signals and confirmed that feeding is required, the sending tank 40 is vibrated, and the compressed nitrogen is used as the energy source to premix the powder in the sending tank 40 with the nitrogen, and then transported to the pulping tank 80 of the pulping system 800 by positive pressure, and 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 for real-time monitoring of powder and nitrogen leakage.

[0394] In addition, before opening the glove box 10 and placing the bagged powder into the glove box 10, the overall workflow of the production system 1000 also includes: The pressure in the temporary storage tank 20 is adjusted to make the pressure in the temporary storage tank 20 balanced, and then the weight of the temporary storage tank 20 is reset to zero. Next, the glove box 10, the temporary storage tank 20 and the sending tank 40 are inerted.

[0395] When adjusting the pressure in the temporary storage tank 20 to balance the pressure in the temporary storage tank 20, the second dust removal valve 522 connected between the temporary storage tank 20 and the second dust removal fan can be opened first, the first feed valve 24 of the temporary storage tank 20 is opened, and the first feed valve 24 of the temporary storage tank 20 is closed after waiting for 5 seconds. The second discharge valve 32 of the temporary storage tank 20 is opened in the 6th second, and the second discharge valve 32 of the temporary storage tank 20 is closed after a delay of 5 seconds. At this time, the pressure in the temporary storage tank 20 does not increase. After waiting for 5 seconds to stabilize, the pressure in the temporary storage tank 20 reaches equilibrium.

[0396] After the temporary storage tank 20 finishes feeding the material into the sending tank 40 , the overall workflow of the production system 1000 further includes: adding nitrogen to the temporary storage tank 20 to maintain the pressure.

[0397] In the above embodiment, the glove box 10 is used to unpack and drop powder in a closed state. During the unpacking process, low-humidity compressed air is introduced into the glove box 10 to prevent the powder from reacting with the powder to generate hydrogen sulfide. After the drop of the powder in the glove box 10 is completed, the shaking wall cleaning function and the purge dust removal function of the glove box 10 are automatically started, and the drop error is controlled within ±50g through program control. At the same time, the glove box 10 and the temporary storage tank 20 are both provided with a shakeable liner, which is a non-metallic flexible material. The liner can be deformed in the opposite direction under the action of the fan and the vacuum pump to shake off the powder on the inner wall of the liner.

[0398] In the above embodiment, a screw feeder 30 is arranged at the outlet of the temporary storage tank 20, which can realize automatic weighing of ingredients and highly automated batching of materials, abandoning the previous manual weighing and then fixed packaging feeding, and can realize mass production more quickly, effectively prevent mistakes, and avoid the harm of sulfide to health caused by manual weighing.

[0399] In the above embodiment, the feed pipe and the discharge pipe are nested and connected by straight pipes, and the first sleeve 61 or the second sleeve 62 is sleeved on the outside, which can not only prevent the feed pipe and the discharge pipe from shaking to generate particles, but also inflate the first sleeve 61 or the second sleeve 62 when the material is dropped, thereby reducing the risk of dust and exhaust 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.

[0400] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A powder feeding system, characterized in that: include: Glove box (10); A temporary storage tank (20), wherein the inlet of the temporary storage tank (20) is connected to the outlet of the glove box (10); 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), and 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 material 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 comprises: 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 liner (12) is an elastic member, and a first gap space (102) is formed between the box body (11) and the first liner (12). The first vibration driving device comprises 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 component.

9. The powder feeding system according to claim 1, characterized in that: The powder feeding system (100) further comprises: a first purging device, the first purging device comprising: 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 material storage chamber (101) of the glove box (10) for purging the powder on the inner wall of the first material 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 material feeding system (100) further comprises: a first detection device, the first detection device being used to detect the air pressure in the first material 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 liner, wherein the second liner is arranged inside the tank body, and the inner side of the second liner defines a second material storage chamber (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, wherein the second vibration driving device is 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 comprises: a second purging device, the second purging device comprising: 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) so as 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 comprises: a third purging device, the third purging device comprising: 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 connected to the third material storage chamber (401) of the sending tank (40) and being used for conveying gas to the third material storage chamber (401) to purge the powder on the inner wall of the third material storage chamber (401).

17. The powder feeding system according to claim 1, characterized in that: The powder material feeding system (100) further comprises: a first weighing device, the first weighing device being used to detect the weight of the temporary storage tank (20).

18. The powder feeding system according to claim 17, characterized in that: A first discharge pipe (13) is provided at the bottom of the glove box (10), and a first discharge valve (14) is connected in series to 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 to the first feed pipe (23). The powder feeding system (100) is configured to allow the powder in the glove box (10) to fall into the temporary storage tank (20) under the action of gravity.

19. The powder feeding system according to claim 18, characterized in that: The first feed pipe (23) and the first discharge pipe (13) can slide relative to each other in the up-down direction and are plug-connected.

20. The powder feeding system according to claim 19, characterized in that: The powder feeding system (100) further comprises: a first sleeve (61), the first sleeve (61) being sleeved on the outer sides of the first feed pipe (23) and the first discharge pipe (13), the upper end of the first sleeve (61) being fixed and sealedly connected to the first discharge pipe (13), the lower end of the first sleeve (61) being fixed and sealedly connected to the first feed pipe (23), and the first sleeve (61) being configured to be retractable in the up and down directions.

21. The powder feeding system according to claim 20, characterized in that: The first sleeve (61) cooperates with the first feed pipe (23) and the first discharge pipe (13) to define a first inflation chamber (611), and the first inflation chamber (611) is connected to the first feed pipe (23) and the first discharge pipe (13). A first inflation port that is connected to the first inflation chamber (611) is formed on the first sleeve (61), and the first inflation port is configured to be connected to an air source.

22. The powder feeding system according to claim 21, characterized in that: The first sleeve (61) is a corrugated tube.

23. The powder feeding system according to claim 21, characterized in that: The first sleeve (61) is a rubber piece.

24. The powder feeding system according to claim 23, characterized in that: The wall thickness of the first sleeve (61) is less than or equal to 2 mm.

25. The powder feeding system according to claim 21, characterized in that: 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.

26. The powder feeding system according to claim 21, 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.

27. The powder feeding system according to claim 17, 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.

28. The powder feeding system according to claim 27, characterized in that: The second feed pipe (41) and the second discharge pipe (31) are relatively slidable in the up-down direction and are plug-connected.

29. The powder feeding system according to claim 28, characterized in that: The powder feeding system (100) further comprises: a second sleeve (62), the second sleeve (62) being sleeved on the outer sides of the second feeding pipe (41) and the second discharging pipe (31), the upper end of the second sleeve (62) being fixed and sealedly connected to the second discharging pipe (31), the lower end of the second sleeve (62) being fixed and sealedly connected to the second feeding pipe (41), and the second sleeve (62) being retractable in the up-down direction. 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 connected to the second feed pipe (41) and the second discharge pipe (31). A second inflation port that is connected to the second inflation chamber (621) is formed on the second sleeve (62), and the second inflation port is configured to be connected to an air source.

30. A production system, characterized in that: include: The powder feeding system (100) according to any one of claims 1 to 29; 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).

31. The production system according to claim 30, 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).

32. A control method for 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 29, and the control method comprises: S11, confirming receipt of a batching instruction for conveying powder to the sending tank (40); S12, controlling the screw feeder (30) to transport powder of a first target weight from the temporary storage tank (20) to the sending tank (40).

33. The control method of the powder feeding system according to claim 32, 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 lower than the first speed.

34. The control method of the powder feeding system according to claim 32, 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.

35. The control method of the powder feeding system according to claim 34, 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).

36. A control method for 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 29, the glove box (10) comprises a box body (11) and a first liner (12) arranged in the box body (11), and the control method comprises: S21, confirming that the glove box (10) has completed the material discharge into the temporary storage tank (20); S22, driving the first lining (12) to vibrate; S23, purging the inner wall of the glove box (10).

37. The control method of the powder feeding system according to claim 36, characterized in that: A first gap space (102) is formed between the box body (11) and the first liner (12), and step S22 comprises: S221, introducing gas into the first gap space (102) for a first preset time; S222, sucking gas from 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 finished, if no, execute S221.

38. The control method of the powder feeding system according to claim 37, 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 a third preset time, If not, execute S221, and if so, issue an alarm message of blanking timeout.

39. The control method of the powder feeding system according to claim 36, 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 determining 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 purging; if not, executing S232.

40. The control method of the powder feeding system according to claim 39, 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 lower than the second preset pressure and the first preset pressure, If the pressure in the glove box (10) is lower than the third preset pressure, 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, executing S232; S2313, turning off a first dust removal fan connected to the glove box (10), and opening a 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, S232 is executed.

41. A control method for 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 29, 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 materials to the sending tank (40); S35, obtaining the weight of the temporary storage tank (20) after feeding the material 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 finished, 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.

42. The control method of the powder feeding system according to claim 41, 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), and 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).

43. The control method of the powder feeding system according to claim 41, characterized in that: Step S33 includes: S331, confirming that the material discharge from the glove box (10) to the temporary storage tank (20) is completed; 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).

44. The control method of the powder feeding system according to claim 41, 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 materials to the sending tank (40).

45. The control method of the powder feeding system according to claim 41, characterized in that: Step S35 includes: S351, driving the second inner liner of the temporary storage tank (20) to vibrate, purge the temporary storage tank (20), and confirm 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.

46. ​​The control method of the powder feeding system according to claim 41, characterized in that: Step S36 includes: comparing the second weight to the initial weight, When the difference between the second weight and the initial weight is within a preset range, 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 then executed again.

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