Material Loading System and Control Method of Material Loading System

Abstract

The present application discloses a material feeding system and a control method for the material feeding system. The present application relates to the technical field of battery processing equipment. The material feeding system includes a material vehicle, a material bin, a gas source driving member, a sending bin, and a gas phase balance device. The material vehicle has a storage cavity, and the storage cavity has an air inlet and a discharge port; the material bin is communicated with the discharge port; the gas source driving member is connected to the air inlet, and the gas source driving member transports the materials in the storage cavity to the material bin; the sending bin is connected to the lower end of the material bin, and the sending bin is connected to a stirring bin, and the material bin is adapted to transport materials into the sending bin; the gas phase balance device is communicated between the sending bin and the material bin and is used for adjusting the pressure difference between the sending bin and the material bin. According to the material feeding system of the present application, manual labor can be liberated, the generation of harmful gases due to the contact of materials with air can be avoided, and at the same time, the operator can be prevented from coming into close contact with the materials, effectively reducing the harm caused by environmental factors to the physical health of the operator.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular to a material feeding system and a control method for the material feeding system. Background Art

[0002] In the related art, in the powder preparation process of lithium batteries, manual operations such as bag unpacking and bag patting are required, which consume manpower and there are also problems of exposed powder during bag opening. For some powders with high risks such as toxic, flammable and explosive powders, such as sulfide powders, when manually unpacking and patting the bags, the leaked sulfide powders react with water in the air to generate hydrogen sulfide, which poses a direct threat to the health of operators. Summary of the Invention

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present application is to provide a material feeding system that avoids the generation of harmful gases when the material contacts the air, and at the same time avoids the operator from coming into close contact with the material, effectively reducing the harm to the health of the operator caused by environmental factors.

[0004] The present application also provides a control method for the above-mentioned material feeding system.

[0005] According to the material feeding system of the first aspect of the present application, the material feeding system is adapted to feed materials towards the mixing bin. The material feeding system includes: a material vehicle having a storage cavity with an air inlet and a discharge outlet; a material bin connected to the discharge outlet; a gas source driving member, one end of which is connected to the air inlet, and the gas source driving member is adapted to transport the material in the storage cavity to the material bin through the discharge outlet; a sending bin connected to the lower end of the material bin and connected to the mixing bin. A first electronic weigher is provided in the material bin, and a second electronic weigher is provided in the sending bin. The material bin is adapted to transport materials into the sending bin; a gas phase balance device connected between the sending bin and the material bin for adjusting the pressure difference between the sending bin and the material bin.

[0006] According to the material feeding system of the present application, when the gas source driving member is used to drive the material in the storage cavity to transfer into the material bin, manpower can be liberated, the contact between the material and the air is avoided, harmful gases are generated, and at the same time, the operator is also avoided from coming into close contact with the material, effectively reducing the harm to the health of the operator caused by environmental factors. Moreover, the gas phase balance device can also be used to adjust the pressure between the material bin and the sending bin, facilitating the transportation of the material in the material bin into the sending bin, thereby improving the feeding efficiency.

[0007] In some embodiments, the gas source driving member is adapted to output nitrogen.

[0008] In this embodiment, nitrogen is input into the storage cavity by the gas source driving member, and the nitrogen will push the materials in the storage cavity towards the material bin. Nitrogen is an inert gas and is not likely to react with the materials after contacting them, which can improve the safety during material transportation.

[0009] In some embodiments, the material vehicle and the gas source driving member are connected and communicated through a first connecting pipe. The material vehicle further includes: a one-way valve and a pressure regulating valve. Both the one-way valve and the pressure regulating valve are arranged on the first connecting pipe. The one-way valve is used to make the first connecting pipe conduct unidirectionally from the gas source driving member towards the storage cavity, and the pressure regulating valve is suitable for regulating the flow rate of the nitrogen.

[0010] In this embodiment, by arranging a one-way valve and a pressure regulating valve on the first connecting pipe of the material vehicle, after the one-way valve is opened, the gas source driving member can transport nitrogen into the storage cavity, which can prevent the materials in the storage cavity from flowing back into the gas source driving member; by adjusting the opening degree of the pressure regulating valve, the rate requirements for transferring different materials into the material bin can be met.

[0011] In some embodiments, the material feeding system further includes: a fan, and the fan is used to extract the gas in the material bin.

[0012] In this embodiment, by arranging a fan which is used to extract the gas in the material bin, a negative pressure state is formed in the material bin. When the gas source driving member drives the materials in the storage cavity to be transported towards the material bin, the efficiency of transporting the materials in the storage cavity towards the material bin can be improved.

[0013] In some embodiments, the material vehicle further has a stirring paddle and a driving motor. The stirring paddle is located in the storage cavity, and the driving motor is suitable for driving the stirring paddle to rotate.

[0014] In this embodiment, by arranging a stirring paddle and a driving motor, and the driving motor is suitable for driving the stirring paddle to rotate to break up the materials in the storage cavity, prevent the materials in the storage cavity from caking, and facilitate the gas source driving member to drive the materials to transfer.

[0015] In some embodiments, a first vibrator is further arranged on the outer peripheral wall of the storage cavity, and the first vibrator is used to vibrate the outer peripheral wall of the storage cavity.

[0016] In this embodiment, by arranging a first vibrator on the outer peripheral wall of the storage cavity, the first vibrator can vibrate the outer peripheral wall of the storage cavity, so that the materials in the storage cavity fall from the inner peripheral wall of the storage cavity into the storage cavity, and all the materials in the storage cavity can be transferred into the material bin.

[0017] In some embodiments, the air inlet is located at the upper end of the storage cavity, and the discharge outlet is located at the lower end of the storage cavity.

[0018] In this embodiment, by arranging the air inlet at the upper end of the storage chamber and the discharge port at the lower end of the storage chamber, the gas in the gas source driving member will push the material in the storage chamber to the discharge port and convey it into the material bin through the discharge port.

[0019] In some embodiments, the material bin has a feed inlet, a filter element is provided at the feed inlet, and a backflush valve is provided on one side of the filter element, and the backflush valve is used to clean the filter element.

[0020] In this embodiment, by arranging a filter element at the feed inlet of the material bin and using a backflush valve to clean the filter element, it is possible to prevent the material from clogging the filter element.

[0021] In some embodiments, a feeding screw is provided in the material bin, and the feeding screw is adapted to drive the material to be conveyed into the sending bin.

[0022] In this embodiment, by arranging the feeding screw, the feeding screw can not only improve the conveying rate of the material in the material bin to the sending bin, but also accurately control the weight of the material in the material bin conveyed to the sending bin.

[0023] In some embodiments, a second vibrator is provided on the outer peripheral wall of the sending bin, and the second vibrator is used to vibrate the outer peripheral wall of the sending bin.

[0024] In this embodiment, by arranging a second vibrator on the outer peripheral wall of the sending bin, the second vibrator can vibrate the outer peripheral wall of the sending bin, so that the material on the inner peripheral wall of the sending bin falls into the sending bin, and all the material in the sending bin can be transferred into the mixing bin.

[0025] In some embodiments, the gas phase balance device includes a second connecting pipe, a first switching valve, a second switching valve, a first pressure sensor and a second pressure sensor. The first end of the second connecting pipe is connected to the material bin, the first switching valve is arranged adjacent to the first end, the second end of the second connecting pipe is connected to the sending bin, the second switching valve is arranged adjacent to the second end, the first pressure sensor is located in the material bin, and the second pressure sensor is located in the sending bin.

[0026] In this embodiment, by arranging a first switching valve, a second switching valve, a first pressure sensor and a second pressure sensor on the gas phase balance device, the first switching valve and the second switching valve are used to open or close the phase balance device, and the first pressure sensor and the second pressure sensor are respectively used to obtain the pressure in the material bin and the pressure in the sending bin, which is convenient for the operator to understand the pressures of the material bin and the sending bin and make corresponding treatments in time.

[0027] In some embodiments, the first on-off valve and / or the second on-off valve is a pneumatic ball valve.

[0028] In this embodiment, by setting the first on-off valve and / or the second on-off valve as a pneumatic ball valve, it can be remotely controlled to open or close, and has high reliability when opening or closing.

[0029] In some embodiments, the second connecting pipe includes a plurality of sub-connecting pipes, and two adjacent sub-connecting pipes are connected by an elastic joint.

[0030] In this embodiment, by setting a flexible connection between two adjacent sub-connecting pipes, the vibration between two adjacent sub-connecting pipes can be absorbed, preventing mutual influence when the material bin and the sending bin vibrate.

[0031] In some embodiments, the material feeding system further includes: a negative pressure feeding pipeline, a positive pressure feeding pipeline, and a conveying leakage detection device. The negative pressure feeding pipeline is connected between the storage chamber and the material bin, the positive pressure feeding pipeline is connected between the sending bin and the mixing bin. The negative pressure feeding pipeline includes a plurality of connected third connecting pipes, the positive pressure feeding pipeline includes a plurality of connected fourth connecting pipes. The conveying leakage detection device includes a plurality of collecting covers and detection sensors. The collecting covers are covered at the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, and the detection sensors are located inside the collecting covers.

[0032] In this embodiment, by setting collecting covers at the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, the leaked gas or material can be temporarily stored.

[0033] In some embodiments, the material feeding system further includes: a dust removal device, and the dust removal device includes a dust removal pipe, and one end of the dust removal pipe is communicated with the collecting cover.

[0034] In this embodiment, by setting a dust removal device, it is used to preliminarily collect the material or gas leaked into the collecting cover, avoiding large-scale leakage of the material or gas.

[0035] In some embodiments, the material feeding system further includes: a gas detection device, and the gas detection device includes a VOC detection sensor, a sulfide detection sensor, and an oxygen concentration detection sensor. The VOC detection sensor, the sulfide detection sensor, and the oxygen concentration detection sensor are all located in the space where the material feeding system is located.

[0036] In this embodiment, by setting a gas detection device, the volatile organic compounds, sulfides, and the oxygen concentration in the air are detected, and the detected results are fed back to the central control system, and the central control system can make corresponding processing on the detected results.

[0037] The control method of the material feeding system according to the second aspect of the present application is used to control the feeding of the material feeding system according to the first aspect of the present application. The control method of the material feeding system includes: replenishing the material bin, and the material bin replenishment includes: obtaining the material weight in the material bin; if the material weight is lower than the first preset value, connecting the storage cavity of any one of the material trucks to the material bin; controlling the material in the storage cavity to feed into the material bin; feeding the material bin for the first preset time, and judging the weight in the material bin; if the material weight is within the first preset range, the feeding is completed; if the material weight is lower than the first preset range, continue to control the material in the storage cavity to feed into the material bin for the first preset time, and judge the weight in the material bin.

[0038] According to the control method of the material feeding system of the present application, according to the material weight in the material bin, the material bin replenishment program is started to automatically replenish the material bin.

[0039] In some embodiments, before controlling the material in the storage cavity to feed into the material bin, it includes: extracting the gas in the material bin for the second preset time; judging the pressure value of the negative pressure feeding pipeline between the storage cavity and the material bin; if the pressure value is lower than the second preset value, controlling the material in the storage cavity to feed into the material bin; if the pressure value is equal to or greater than the second preset value, the negative pressure feeding pipeline leaks, and the central control alarms.

[0040] In this embodiment, by judging the pressure value of the negative pressure feeding pipeline between the storage cavity and the material bin, it is detected whether the negative pressure feeding pipeline leaks.

[0041] In some embodiments, after feeding the material bin for the first preset time, it further includes: controlling the storage cavity to stop feeding into the material bin; opening the backflush valve in the material bin to clean the filter element in the material bin for the third preset time.

[0042] In this embodiment, after the replenishment is completed, the filter element is cleaned, and the material on the filter element is cleaned into the material bin.

[0043] In some embodiments, after the material weight is lower than the first preset range, it further includes: obtaining the number of times the material in the storage cavity feeds into the material bin; if the number of times is lower than the first preset number of times, controlling the material in the storage cavity to feed into the material bin; if the number of times is equal to the first preset number of times, the feeding tolerance is exceeded, and the central control alarms.

[0044] In this embodiment, by obtaining the number of times the material in the storage cavity feeds into the material bin, it is judged whether there is a problem with the material bin replenishment program.

[0045] In some embodiments, after the material weight is within the first preset range, the following steps are further included: clearing the material in the positive pressure feeding pipeline between the storage chamber and the material bin so that the material is transported to the material bin; opening the backflush valve in the material bin to clean the filter element in the material bin for a fourth preset time; obtaining the pressure values on both sides of the filter element as the first pressure value and the second pressure value respectively; judging the pressure difference between the first pressure value and the second pressure value; if the pressure difference is greater than or equal to a third preset value, the central control gives an alarm; if the pressure difference is less than the third preset value, the feeding is completed.

[0046] In this embodiment, the situation of the filter element is judged by obtaining the pressure values on both sides of the filter element and comparing them.

[0047] In some embodiments, the material feeding system is adapted to automatically feed the mixing bin, and a sending bin is connected between the mixing bin and the material bin. The control method of the material feeding system further includes: feeding the mixing bin, and the feeding of the mixing bin includes: obtaining the required material value of the mixing bin; obtaining the material weight in the material bin and comparing the material weight with the required material value; if the material weight is lower than the required material value, performing supplementary feeding of the material bin; if the material weight is equal to or greater than the required material value, controlling the material in the material bin to feed into the sending bin; starting the feeding program of the sending bin towards the mixing bin.

[0048] In this embodiment, by setting the feeding program of the mixing bin, the automatic feeding of the material from the sending bin to the mixing bin is completed.

[0049] In some embodiments, controlling the material in the material bin to feed into the sending bin includes: opening the air pressure balancing device between the material bin and the sending bin; after the feeding of the material in the material bin into the sending bin ends, closing the air pressure balancing device.

[0050] In this embodiment, by opening the air pressure balancing device between the material bin and the sending bin when the material bin feeds into the sending bin, it is convenient to feed into the sending bin.

[0051] In some embodiments, when starting the feeding program of the sending bin towards the mixing bin: if gas or material leakage is detected, the central control gives an alarm and stops feeding.

[0052] In this embodiment, when starting the feeding program of the sending bin towards the mixing bin, it is detected in real time whether nitrogen or material leaks. If gas or material leakage is detected, the central control gives an alarm and stops feeding.

[0053] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0054] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0055] Figure 1 is a schematic diagram of a material feeding system according to some embodiments of the present application;

[0056] Figure 2 is a schematic diagram of a material vehicle according to some embodiments of the present application;

[0057] Figure 3 is a schematic diagram of a material bin and a sending bin according to some embodiments of the present application;

[0058] Figure 4 is a flowchart of replenishing the material bin according to some embodiments of the present application;

[0059] Figure 5 is a flowchart of feeding the mixing bin according to some embodiments of the present application.

[0060] Reference numerals:

[0061] 101, central control system; 102, electric cabinet;

[0062] 10, material vehicle; 11, storage cavity; 12, air inlet; 13, discharge port; 14, stirring paddle; 15, drive motor; 16, first vibrator;

[0063] 20, material bin; 21, feeding screw;

[0064] 31, gas source driving member; 32, fan; 321, filter;

[0065] 40, sending bin; 41, second vibrator;

[0066] 50, gas phase balance device; 51, second connecting pipe; 511, sub-connecting pipe; 512, elastic joint; 52, first switching valve; 53, second switching valve;

[0067] 61, negative pressure feeding pipeline; 62, positive pressure feeding pipeline; 63, dust removal pipe;

[0068] 70, gas detection device; 71, VOC detection sensor; 72, sulfide detection sensor; 73, oxygen concentration detection sensor;

[0069] 80, mixing bin. Detailed implementation manners

[0070] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0071] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0072] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication 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 present application can be understood according to specific circumstances.

[0073] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied to electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing. Among them, in the power batteries currently in use, the proportion of lithium-ion batteries is also increasing.

[0074] In the powder preparation process of lithium batteries, manual operations such as bag opening and bag patting are required, which consume labor and there are also problems of powder exposure during bag opening. This method is not applicable to powders with high risks such as toxic, flammable, and explosive powders, such as sulfide powders. When manually opening and patting the bag of sulfide powder, the leaked sulfide powder reacts with water in the air to generate hydrogen sulfide. Therefore, in the powder preparation process of solid-state batteries, the feeding method of powder bag opening and suction cannot be used.

[0075] During the powder feeding and conveying process of lithium batteries, compressed air is required as an energy source to drive the powder feeding and conveying. After the hazardous powder comes into contact with air, a dust cloud will be formed, increasing the risk of dust explosion. Therefore, the powder feeding and conveying form of lithium batteries cannot meet the powder preparation and conveying of solid-state batteries either.

[0076] Based on the above considerations, for the occupational health of operators, a material feeding system is designed. The material feeding system includes a material truck, a material bin, and a gas source driving part. Connect the air inlet of the material truck to the gas source driving part, and then connect the discharge port of the material truck to the material bin. After that, turn on the gas source driving part. The gas source driving part outputs gas through the air inlet towards the storage cavity, which is used to push the material in the storage cavity through the discharge port into the material bin, avoiding the contact of the material with air and generating harmful gases. At the same time, it also avoids the operators' close contact with the material, effectively reducing the harm caused by environmental factors to the physical health of the operators.

[0077] The material feeding system disclosed in the embodiments of the present application transports the raw materials of lithium batteries into the mixing bin. The raw materials of lithium batteries can be used to process battery cells. The battery cells can be used as power-consuming devices of power sources, or various energy storage systems using batteries as energy storage elements. The power-consuming devices can be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0078] Next, refer to Figures 1 - 3 Describe the material feeding system according to the embodiments of the present application. Figure 1 FIG. is a schematic diagram of the material feeding system according to some embodiments of the present application. Figure 2 FIG. is a schematic diagram of the material truck 10 according to some embodiments of the present application. Figure 3 FIG. is a schematic diagram of the material bin 20 and the sending bin 40 according to some embodiments of the present application.

[0079] According to the material feeding system of the first aspect of the present application, the material feeding system is adapted to feed materials towards the mixing bin 80. The material feeding system includes: a material truck 10, the material truck 10 having a storage cavity 11, the storage cavity 11 having an air inlet 12 and a discharge outlet 13; a material bin 20, the material bin 20 being in communication with the discharge outlet 13; a gas source driving member 31, one end of the gas source driving member 31 being connected to the air inlet 12, the gas source driving member 31 being adapted to convey the materials in the storage cavity 11 through the discharge outlet 13 to the material bin 20; a sending bin 40, the sending bin 40 being connected to the lower end of the material bin 20, the sending bin 40 being connected to the mixing bin 80, a first electronic weighing device being provided in the material bin 20, a second electronic weighing device being provided in the sending bin 40, the material bin 20 being adapted to convey materials into the sending bin 40, and a gas phase balance device 50, the gas phase balance device 50 being connected between the sending bin 40 and the material bin 20 for adjusting the pressure difference between the sending bin 40 and the material bin 20.

[0080] The material feeding system is a device for automatically feeding materials to the mixing bin 80. The mixing bin 80 can be used in the field of lithium battery processing to uniformly mix positive or negative electrode materials (such as active substances, conductive agents, binders, etc.) in the mixing bin 80 to form a stable slurry.

[0081] In the related art, in the powder material preparation process of lithium batteries, manual operations such as bag unpacking and bag tapping are required, which consume labor and there are also problems of exposed powder during bag opening. This method is not applicable to powders with high risks such as toxic, flammable, and explosive powders, such as sulfide powders. When manually unpacking and tapping sulfide powders, the sulfide powders react with water in the air to generate hydrogen sulfide after leakage. Therefore, in the solid-state battery powder material preparation process, the powder feeding method of opening the bag and sucking the material cannot be used.

[0082] During the powder feeding and conveying process of lithium batteries, compressed air needs to be used as an energy source to drive the powder feeding and conveying. After the dangerous powder comes into contact with air, a dust cloud will be formed, increasing the risk of dust explosion. Therefore, the powder feeding and conveying forms of lithium batteries cannot meet the powder material preparation and conveying of solid-state batteries either.

[0083] The material feeding system of the present application includes a material truck 10, a material bin 20, and a gas source driving member 31. The material truck 10 has a storage cavity 11 for storing materials, and the gas source driving member 31 is used to drive the materials in the storage cavity 11 to be conveyed into the material bin 20, and the material bin 20 is used to temporarily store materials. The gas source driving member 31 can convey inert gas into the storage cavity 11, and the inert gas is used as an energy source to drive the material feeding. For example, the inert gas can include: nitrogen, argon, neon, or helium, etc. Among the inert gases, nitrogen accounts for about 78% of the air volume and has a low cost. The gas source of the gas source driving member 31 is preferably nitrogen.

[0084] Optionally, there are multiple material carts 10, and each material cart 10 has a storage cavity 11 integrally formed on the material cart 10. When receiving materials, the material carts 10 receive materials integrally. Optionally, there is one material cart 10 and multiple storage cavities 11. The storage cavities 11 are detachably installed on the material cart 10. When receiving materials, the storage cavities 11 receive materials integrally with the materials. The material cart 10 has rollers, which facilitates the movement of the material cart 10 when moving it.

[0085] For example, the effective volume of the material cart 10 is 200L, the pressure resistance is 0.06 Mpa, the working pressure is 0.03 Mpa, and the amount of materials fed into the storage cavity 11 at one time is not less than 150 kg / time, which is much higher than the feeding rate of 600 g / time in the related technology, greatly improving the material preparation speed.

[0086] When feeding the material bin 20, the operator pushes the material cart 10 to one side of the air source driving part 31, connects the air inlet 12 of the material cart 10 with the air source driving part 31 respectively, then connects the discharge port 13 of the material cart 10 with the material bin 20. After that, the air source driving part 31 is turned on. The air source driving part 31 outputs gas into the storage cavity 11 through the air inlet 12 to push the materials in the storage cavity 11 through the discharge port 13 into the material bin 20. After all the materials in one material cart 10 are transported into the material bin 20, this material cart 10 can be removed, and then another material cart 10 is pushed. The material cart 10 and the air source driving part 31 are connected again until the materials in the material bin 20 reach the preset value.

[0087] For example, when connecting the material cart 10 with the air source driving part 31, an air source adapter can be selected; when connecting the material cart 10 with the material bin 20, a material bin 20 adapter can be selected. The air source adapter and the material bin 20 adapter adopt different types of quick connectors, which are safe, reliable and effectively prevent misoperation.

[0088] The materials in the material bin 20 are transported towards the sending bin 40 under the action of gravity. The first electronic weigher can weigh the weight of the materials that need to be transferred from the material bin 20 to the sending bin 40, and the second electronic weigher can weigh the weight of the materials transferred to the sending bin 40, so as to accurately control the weight of the materials that need to be transferred from the material bin 20 to the sending bin 40. The material bin 20 can transport different materials towards the sending bin 40, and premix the materials in the sending bin 40. After the premixing is completed, they can be transported into the mixing bin 80 to complete the feeding.

[0089] When the material bin 20 conveys materials into the sending bin 40, the gas phase balancing device 50 is opened to balance the pressures of the material bin 20 and the sending bin 40. When the material bin 20 has conveyed materials into the sending bin 40, the air in the sending bin 40 can be conveyed into the material bin 20 through the gas phase balancing device 50, so that the pressures of the material bin 20 and the sending bin 40 are equal or close, which is convenient for the materials in the material bin 20 to continue to be conveyed into the sending bin 40, and thus the feeding efficiency can be improved.

[0090] The gas phase balancing device 50 can adjust the pressures of the two closed spaces, which is used to improve the batching accuracy of the closed spaces and can also prevent gas or material leakage.

[0091] For example, there can be multiple stirring bins 80, and the multiple stirring bins 80 can be arranged in parallel, and the material feeding system can feed multiple stirring bins 80 at the same time.

[0092] According to the material feeding system of the present application, the air source driving member 31 is used to drive the materials in the storage cavity 11 to be transferred into the material bin 20, which can liberate manpower and there can be more material feeding systems cared for by a single person; it also avoids the materials from contacting air to generate harmful gases, and at the same time avoids the operators from contacting the materials at close range, effectively reducing the harm to the physical health of the operators caused by environmental factors. At the same time, the gas phase balancing device 50 is used to adjust the pressure between the material bin 20 and the sending bin 40, which is convenient for the materials in the material bin 20 to be conveyed into the sending bin 40, and thus the feeding efficiency can be improved.

[0093] In a specific example, the material bin 20 is provided with a feed inlet, and a feed valve is arranged at the feed inlet. An outlet valve is arranged at the outlet 13 of the material vehicle 10. When transferring the materials in the storage cavity 11 into the material bin 20, the feed valve and the outlet valve can be opened, and when the feeding stops, the feed valve and the outlet valve can be closed.

[0094] The material feeding system further includes: an electric cabinet 102 and a central control system 101. The electric cabinet 102 is used to provide power for the material feeding system, and the central control system 101 controls the operation of the material feeding system.

[0095] In some embodiments, referring to Figure 1 , the air source driving member 31 is suitable for outputting nitrogen.

[0096] Exemplarily, nitrogen is an inert gas, which is not easy to react with materials, and has low source cost and is easy to prepare. In the related art, air is used as an energy source. After the materials contact air, a dust cloud will be formed, increasing the risk of explosion. The air source driving member 31 inputs nitrogen into the storage cavity 11, and the nitrogen will push the materials in the storage cavity 11 to move towards the material bin 20. After contacting the materials, nitrogen is not easy to react with the materials, which can improve the safety when conveying materials.

[0097] Specifically, the gas source driving member 31 is adapted to output compressed nitrogen gas.

[0098] In this embodiment, nitrogen gas is input into the storage cavity 11 by the gas source driving member 31. The nitrogen gas will push the materials in the storage cavity 11 towards the material bin 20. Nitrogen gas is an inert gas and is not likely to react with the materials after contacting them, which can improve the safety during material transportation.

[0099] In some embodiments, referring to Figures 1 - 2 , the material vehicle 10 and the gas source driving member 31 are connected and communicated through a first connecting pipe. The material vehicle 10 further includes: a one-way valve and a pressure regulating valve. Both the one-way valve and the pressure regulating valve are arranged on the first connecting pipe. The one-way valve is used to make the first connecting pipe conduct unidirectionally from the gas source driving member 31 towards the storage cavity 11, and the pressure regulating valve is adapted to regulate the flow rate of the nitrogen gas.

[0100] Exemplarily, the first connecting pipe has an air inlet 12, and the gas source driving member 31 is connected and communicated with the air inlet 12. The one-way valve can be located upstream of the pressure regulating valve, and the pressure regulating valve can be located upstream of the one-way valve. When the one-way valve is opened, the gas source driving member 31 can transport nitrogen gas into the storage cavity 11, which can prevent the materials in the storage cavity 11 from flowing back into the gas source driving member 31.

[0101] By adjusting the opening degree of the pressure regulating valve, the flow rate of the nitrogen gas transported from the gas source driving member 31 into the storage cavity 11 can be adjusted. If the flow rate of the nitrogen gas transported from the source driving member into the storage cavity 11 is relatively large, a large amount of materials in the storage cavity 11 can be driven towards the material bin 20 in a short time, thereby improving the efficiency of transporting the materials in the storage cavity 11 to the material bin 20; if the flow rate of the nitrogen gas transported from the gas source driving member 31 into the storage cavity 11 is relatively small, the materials in the storage cavity 11 can be driven to slowly move towards the material bin 20, which can improve the stability of transporting the materials in the storage cavity 11 to the material bin 20; the opening degree of the pressure regulating valve can be adjusted according to different materials to achieve the purpose of adapting to different material transfer rates.

[0102] In this embodiment, by arranging a one-way valve and a pressure regulating valve on the first connecting pipe of the material vehicle 10, after the one-way valve is opened, the gas source driving member 31 can transport nitrogen gas into the storage cavity 11, which can prevent the materials in the storage cavity 11 from flowing back into the gas source driving member 31; by adjusting the opening degree of the pressure regulating valve, the rate requirements for different materials to be transferred into the material bin 20 can be met.

[0103] In some embodiments, referring to Figure 1 , the material feeding system further includes: a blower 32, and the blower 32 is used to extract the gas in the material bin 20.

[0104] Exemplarily, when the air source driving member 31 drives the materials in the storage cavity 11 to be conveyed into the material bin 20, after the fan 32 is turned on, the fan 32 can extract the gas in the material bin 20, so that a negative pressure state is formed in the material bin 20, which can increase the conveying efficiency of the materials in the storage cavity 11 into the material bin 20.

[0105] A filter 321 is provided on the pipeline for the fan 32 to extract the gas in the material bin 20, and is used to filter the impurities in the gas in the material bin 20.

[0106] For example, the fan 32 can be a Roots blower.

[0107] In this embodiment, by providing the fan 32, the fan 32 is used to extract the gas in the material bin 20, so that a negative pressure state is formed in the material bin 20. When the air source driving member 31 drives the materials in the storage cavity 11 to be conveyed into the material bin 20, the conveying efficiency of the materials in the storage cavity 11 into the material bin 20 can be improved.

[0108] In some embodiments, referring to Figures 1 - 2 , the material vehicle 10 further has a stirring paddle 14 and a driving motor 15. The stirring paddle 14 is located in the storage cavity 11, and the driving motor 15 is adapted to drive the stirring paddle 14 to rotate.

[0109] Exemplarily, when the air source driving member 31 drives the materials in the storage cavity 11 to be conveyed into the material bin 20, the driving motor 15 drives the stirring paddle 14 to rotate, which can disperse the materials in the storage cavity 11 and prevent the materials in the storage cavity 11 from caking and blocking at the discharge port 13. At the same time, after the materials in the storage cavity 11 are dispersed, the material particles in the storage cavity 11 are smaller, which is also convenient for the air source driving member 31 to drive the material transfer.

[0110] For example, the driving motor 15 can be located outside the storage cavity 11 without occupying the space of the storage cavity 11, so that the storage cavity 11 can accommodate more materials.

[0111] In this embodiment, by providing the stirring paddle 14 and the driving motor 15, the driving motor 15 is adapted to drive the stirring paddle 14 to rotate to disperse the materials in the storage cavity 11, prevent the materials in the storage cavity 11 from caking, and facilitate the air source driving member 31 to drive the material transfer.

[0112] In some embodiments, referring to Figures 1 - 2 , a first vibrator 16 is further provided on the outer peripheral wall of the storage cavity 11, and the first vibrator 16 is used to vibrate the outer peripheral wall of the storage cavity 11.

[0113] Exemplarily, when the air source driving member 31 drives the materials in the storage cavity 11 to be conveyed into the material bin 20, the first vibrator 16 can vibrate the outer peripheral wall of the storage cavity 11, so that the materials in the storage cavity 11 fall from the inner peripheral wall of the storage cavity 11 into the storage cavity 11, and all the materials in the storage cavity 11 can be transferred into the material bin 20.

[0114] The first vibrator 16 is arranged on the outer peripheral wall of the storage cavity 11 without occupying the space of the storage cavity 11, so that the storage cavity 11 can accommodate more materials.

[0115] In this embodiment, by arranging the first vibrator 16 on the outer peripheral wall of the storage cavity 11, the first vibrator 16 can vibrate the outer peripheral wall of the storage cavity 11, so that the materials in the storage cavity 11 fall from the inner peripheral wall of the storage cavity 11 into the storage cavity 11, and all the materials in the storage cavity 11 can be transferred into the material bin 20.

[0116] In some embodiments, referring to Figures 1 - 2 , the air inlet 12 is located at the upper end of the storage cavity 11, and the discharge port 13 is located at the lower end of the storage cavity 11.

[0117] Exemplarily, the air inlet 12 is connected to the air source driving member 31, and the discharge port 13 is connected to the material bin 20. After the gas in the air source driving member 31 enters the storage cavity 11 from the air inlet 12, with the discharge port 13 at the lower end, the gas will push the materials in the storage cavity 11 to the discharge port 13 and convey them into the material bin 20 through the discharge port 13.

[0118] In this embodiment, by arranging the air inlet 12 at the upper end of the storage cavity 11 and the discharge port 13 at the lower end of the storage cavity 11, the gas in the air source driving member 31 will push the materials in the storage cavity 11 to the discharge port 13 and convey them into the material bin 20 through the discharge port 13.

[0119] In some embodiments, referring to Figure 1 , the material bin 20 has a feed inlet, a filter element is provided at the feed inlet, and a backflush valve is provided on one side of the filter element for cleaning the filter element.

[0120] Exemplarily, when the materials in the storage cavity 11 are transferred into the material bin 20, the filter element can filter the materials to filter out impurities in the materials and prevent the impurities in the materials from entering the material bin 20; or filter out large particle materials in the materials.

[0121] When the materials are conveyed into the material bin 20 through the filter element, the filter element is adhered with materials. After the feeding is completed, the backflush valve can be opened to blow the materials on the filter element into the material bin 20 for cleaning the filter element.

[0122] In this embodiment, a filter element is provided at the feed inlet of the material bin 20, and a backflush valve is used to clean the filter element to prevent the material from clogging the filter element.

[0123] In some embodiments, referring to Figure 1 , Figure 3 , a feeding screw 21 is provided in the material bin 20, and the feeding screw 21 is adapted to drive the material to be conveyed into the sending bin 40.

[0124] Exemplarily, when the material bin 20 conveys the material towards the sending bin 40, the feeding screw 21 is turned on. When the feeding screw 21 rotates, it can drive the material to be conveyed into the sending bin 40. The feeding screw 21 can drive the material in the material bin 20 to be conveyed into the sending bin 40, which can improve the conveying rate of the material in the material bin 20 to the sending bin 40.

[0125] The weight of the material to be conveyed into the sending bin 40 is weighed by the first electronic weigher and then fed back to the central control system 101. The central control system 101 controls the rotation speed of the feeding screw 21. First, at the initial stage of feeding, the rotation speed of the feeding screw 21 is increased to feed the material quickly. When the required material is lower than the set value, the rotation speed of the feeding screw 21 is decreased to achieve precise feeding. After the feeding is completed, the feeding screw 21 stops rotating; at the same time, the second electronic weigher in the sending bin 40 weighs the material in the sending bin 40 to check whether the material in the sending bin 40 reaches the required material weight of the sending bin 40. If it is insufficient, it is fed back to the central control system 101, and the central control system 101 continues to control the feeding screw 21 to feed. If it is satisfied, the feeding stops.

[0126] In a specific example, compressed nitrogen is used to purge the inner pipe walls of the feeding screw 21 and the material bin 20, so that the residual material between the feeding screw 21 and the inner pipe wall of the material bin 20 is purged into the sending bin 40, achieving the functions of pipe cleaning and precise weighing until the second electronic weigher in the sending bin 40 continuously detects that the material weight in the sending bin 40 is within a reasonable error of the required material weight of the sending bin 40, that is, the feeding is completed.

[0127] In this embodiment, by providing the feeding screw 21, the feeding screw 21 can not only improve the conveying rate of the material in the material bin 20 to the sending bin 40, but also precisely control the weight of the material in the material bin 20 conveyed to the sending bin 40.

[0128] In some embodiments, referring to Figure 1 , Figure 3 , a second vibrator 41 is provided on the outer peripheral wall of the sending bin 40, and the second vibrator 41 is used to vibrate the outer peripheral wall of the sending bin 40.

[0129] Exemplarily, when the material in the sending silo 40 is being conveyed towards the mixing silo 80, the second vibrator 41 can vibrate the outer peripheral wall of the sending silo 40, causing the material on the inner peripheral wall of the sending silo 40 to fall into the sending silo 40, so that all the material in the sending silo 40 can be transferred to the mixing silo 80.

[0130] The second vibrator 41 is arranged on the outer peripheral wall of the sending silo 40 without occupying the space of the sending silo 40, enabling the sending silo 40 to accommodate more material.

[0131] In this embodiment, by arranging the second vibrator 41 on the outer peripheral wall of the sending silo 40, the second vibrator 41 can vibrate the outer peripheral wall of the sending silo 40, causing the material on the inner peripheral wall of the sending silo 40 to fall into the sending silo 40, so that all the material in the sending silo 40 can be transferred to the mixing silo 80.

[0132] In a specific example, a gas butterfly valve is provided on the outer peripheral wall of the sending silo 40. When the gas butterfly valve is opened, external nitrogen can be introduced into the sending silo 40 to convey the material in the sending silo 40 to the mixing silo 80; at the same time, the second vibrator 41 is turned on to vibrate the outer peripheral wall of the sending silo 40, causing the material on the inner peripheral wall of the sending silo 40 to fall into the sending silo 40.

[0133] In some embodiments, referring to Figure 1 、 Figure 3 , the gas phase balance device 50 includes a second connecting pipe 51, a first switching valve 52, a second switching valve 53, a first pressure sensor and a second pressure sensor. The first end of the second connecting pipe 51 is connected to the material silo 20, the first switching valve 52 is arranged adjacent to the first end, the second end of the second connecting pipe 51 is connected to the sending silo 40, the second switching valve 53 is arranged adjacent to the second end, the first pressure sensor is located in the material silo 20, and the second pressure sensor is located in the sending silo 40.

[0134] Exemplarily, when the material silo 20 needs to convey material towards the sending silo 40, the first switching valve 52 and the second switching valve 53 are opened, and air can circulate between the sending silo 40 and the mixing silo 80 to balance the pressure between the material silo 20 and the sending silo 40, facilitating the conveyance of material from the material silo 20 to the sending silo 40.

[0135] When the material cart 10 conveys materials into the material bin 20, the material bin 20 is in a negative pressure state. The first switch valve 52 and the second switch valve 53 are closed to prevent the gas in the sending bin 40 from entering the material bin 20 and affecting the gas state of the material bin 20. When the sending bin 40 conveys materials into the mixing bin 80, the sending bin 40 is in a positive pressure state. The first switch valve 52 and the second switch valve 53 are closed to prevent the gas in the sending bin 40 from entering the material bin 20 and affecting the gas state of the sending bin 40.

[0136] The first pressure sensor is used to obtain the pressure in the material bin 20 and feedback it to the central control system 101. The second pressure sensor is used to obtain the pressure in the sending bin 40 and feedback it to the central control system 101. The central control system 101 displays the pressure in the material bin 20 and the pressure in the sending bin 40, facilitating the operator to understand the pressures of the material bin 20 and the sending bin 40 and make corresponding treatments in a timely manner. For example, when the pressure difference between the pressure in the material bin 20 and the pressure in the sending bin 40 is greater than 1 kPa, the central control system 101 alarms and stops discharging materials.

[0137] In this embodiment, by setting the first switch valve 52, the second switch valve 53, the first pressure sensor and the second pressure sensor on the gas phase balance device 50, the first switch valve 52 and the second switch valve 53 are used to open or close the phase balance device, and the first pressure sensor and the second pressure sensor are respectively used to obtain the pressure in the material bin 20 and the pressure in the sending bin 40, facilitating the operator to understand the pressures of the material bin 20 and the sending bin 40 and make corresponding treatments in a timely manner.

[0138] In some embodiments, referring to Figure 1 、 Figure 3 , the first switch valve 52 and / or the second switch valve 53 is a pneumatic ball valve.

[0139] Exemplarily, a pneumatic ball valve is a valve that uses compressed air as a power source and drives the sphere to rotate through a pneumatic actuator to achieve the switching or regulating function. It can be used for remote control and has high reliability when opening or closing. It can be that the first switch valve 52 is a pneumatic ball valve, or the second switch valve 53 is a pneumatic ball valve, or both the first switch valve 52 and the second switch valve 53 are pneumatic ball valves.

[0140] In this embodiment, by setting the first switch valve 52 and / or the second switch valve 53 as a pneumatic ball valve, it can be remotely controlled to open or close, and has high reliability when opening or closing.

[0141] In some embodiments, referring to Figure 1 、 Figure 3, the second connecting pipe 51 includes a plurality of sub-connecting pipes 511, and two adjacent sub-connecting pipes 511 are connected by an elastic joint 512.

[0142] In this embodiment, by setting a flexible connection between two adjacent sub-connecting pipes 511, the vibration between two adjacent sub-connecting pipes 511 can be absorbed, preventing mutual influence when the material bin 20 and the sending bin 40 vibrate.

[0143] For example, the elastic joint 512 can be a plastic pipe joint, which can absorb the vibration between two adjacent sub-connecting pipes 511.

[0144] In some embodiments, referring to Figure 1 , Figure 3 , the material feeding system further includes: a negative pressure feeding pipeline 61, a positive pressure feeding pipeline 62, and a conveying leakage detection device. The negative pressure feeding pipeline 61 is connected between the storage chamber 11 and the material bin 20, the positive pressure feeding pipeline 62 is connected between the sending bin 40 and the mixing bin 80. The negative pressure feeding pipeline 61 includes a plurality of connected third connecting pipes, the positive pressure feeding pipeline 62 includes a plurality of connected fourth connecting pipes. The conveying leakage detection device includes a plurality of collecting covers and detection sensors. The collecting covers are covered on the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, and the detection sensors are located inside the collecting covers.

[0145] Exemplarily, gas or material leakage is likely to occur at the joints of adjacent third connecting pipes of the negative pressure feeding pipeline 61. A collecting cover is covered on the outer peripheral side of the joints of adjacent third connecting pipes. If gas or material leaks from the negative pressure feeding pipeline 61, the gas or material can be temporarily stored in the collecting cover, preventing gas or material from leaking everywhere.

[0146] Gas or material leakage is likely to occur at the joints of adjacent fourth connecting pipes of the positive pressure feeding pipeline 62. A collecting cover is covered on the outer peripheral side of the joints of adjacent fourth connecting pipes. If gas or material leaks from the positive pressure feeding pipeline 62, the gas or material can be temporarily stored in the collecting cover, preventing gas or material from leaking everywhere.

[0147] And a detection sensor is arranged inside the collecting cover, which can detect in real time whether gas or material leakage occurs at the joints of adjacent third connecting pipes or the joints of adjacent fourth connecting pipes, and feedback to the central control system 101, facilitating the operators to make timely treatment.

[0148] In this embodiment, by arranging collecting covers at the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, the leaked gas or material can be temporarily stored.

[0149] In some embodiments, referring to Figure 1, the material feeding system further includes: a dust removal device, which includes a dust removal pipe 63, and one end of the dust removal pipe 63 is communicated with the collection hood.

[0150] Exemplarily, after the detection sensor detects that the material or gas in the negative pressure feeding pipeline 61 or the positive pressure feeding pipeline 62 leaks into the collection hood, the dust removal pipe 63 can collect the material or gas in the collection hood to avoid leakage from the collection hood. The material or gas collected by the dust removal pipe 63 can be transported to the transfer bin of the dust removal device, where the leaked material or gas can be temporarily stored, and the operator can handle the leakage of the negative pressure feeding pipeline 61 or the positive pressure feeding pipeline 62.

[0151] In this embodiment, by setting up a dust removal device, it is used to initially collect the material or gas leaking into the collection hood, avoiding large-scale leakage of the material or gas.

[0152] In some embodiments, referring to Figure 1 , the material feeding system further includes: a gas detection device 70, which includes a VOC detection sensor 71, a sulfide detection sensor 72, and an oxygen concentration detection sensor 73. The VOC detection sensor 71, the sulfide detection sensor 72, and the oxygen concentration detection sensor 73 are all located in the space where the material feeding system is located.

[0153] VOC is volatile organic compounds, organic chemical substances that are easily evaporated or volatilized at room temperature, and have important impacts on the environment, health, and climate. The VOC detection sensor 71 is used to detect volatile organic compounds, the sulfide detection sensor 72 is used to detect sulfides, and the oxygen concentration detection sensor 73 is used to detect the oxygen concentration in the air. The detected results are fed back to the central control system 101, and the central control system 101 can make corresponding treatments for the detected results.

[0154] In this embodiment, by setting up a gas detection device 70, it detects volatile organic compounds, sulfides, and the oxygen concentration in the air, and feeds back the detected results to the central control system 101. The central control system 101 can make corresponding treatments for the detected results.

[0155] Next, refer to Figures 4 - 5 to describe the control method for the material feeding system according to the embodiments of the present application. Figure 4 is a flowchart of replenishing the material bin 20 according to some embodiments of the present application. Figure 5 is a flowchart of feeding the mixing bin 80 according to some embodiments of the present application.

[0156] The control method of the material feeding system according to the second aspect of the present application is used to control the feeding of the material feeding system according to the first aspect of the present application. The control method of the material feeding system includes: replenishing the material bin 20, and the replenishment of the material bin 20 includes:

[0157] Obtaining the weight of the material in the material bin 20;

[0158] If the material weight is lower than the first preset value, then connect the storage cavity 11 of any one of the material carts 10 to the material bin 20;

[0159] Control the material in the storage cavity 11 to feed into the material bin 20;

[0160] Make the material bin 20 feed for the first preset time, and judge the weight in the material bin 20;

[0161] If the material weight is within the first preset range, the feeding is completed;

[0162] If the material weight is lower than the first preset range, then continue to control the material in the storage cavity 11 to feed into the material bin 20 for the first preset time, and judge the weight in the material bin 20.

[0163] Exemplarily, after the material bin 20 conveys the material to the sending bin 40, the material in the material bin 20 decreases, and the material bin 20 needs to be replenished.

[0164] When the weight of the material in the material bin 20 is lower than the first preset value and the low weight alarm of the material bin 20 is triggered, then connect the storage cavity 11 of any one of the material carts 10 to the material bin 20. At the same time, the material cart 10 is connected to the air source driving member 31, and the first preset value can be set according to different material types. For example, the first preset value can be 200 g.

[0165] Control the material in the storage cavity 11 to feed into the material bin 20. The material cart 10 is provided with a one-way valve and a pressure regulating valve. The storage cavity 11 is provided with an air inlet 12 and a discharge port 13. A one-way valve and a pressure regulating valve are provided at the air inlet 12, and a discharge valve is provided at the discharge port 13. The material bin 20 is provided with a feed inlet, and a feed valve is provided at the feed inlet. The material cart 10 is further provided with a first vibrator 16, a driving motor 15 and a stirring paddle 14. Open the one-way valve, adjust the opening degree of the pressure regulating valve, and open the discharge valve and the feed valve, and turn on the driving motor 15 and the first vibrator 16. The air source driving member 31 conveys the material in the storage cavity 11 to the material bin 20 through the discharge port 13 and the feed inlet.

[0166] Make the material bin 20 feed for the first preset time. After that, close the feed valve, obtain the weight of the material in the material bin 20, and judge the weight of the material in the material bin 20. For example, the first preset time is 20 s.

[0167] If the weight of the material is within the first preset range, the feeding is completed, and at the same time, the one-way valve, the pressure regulating valve, and the discharge port 13 are closed. The first preset range is within plus or minus 50 g of the required weight of the material. For example, the first preset range can be 250 kg ± 50 g.

[0168] If the weight of the material is lower than the first preset range, the feed valve is opened, and the material in the storage chamber 11 is continuously controlled to feed into the material bin 20 for the first preset time, and the weight in the material bin 20 is judged, and the above feeding steps are repeated until the weight of the material is within the first preset range, and the feeding is completed. For example, being lower than the first preset range means being lower than 250 kg - 50 g.

[0169] According to the control method of the material feeding system of the present application, according to the weight of the material in the material bin 20, the replenishment program of the material bin 20 is started, and the material bin 20 is automatically replenished.

[0170] In some embodiments, before controlling the material in the storage chamber 11 to feed into the material bin 20, it includes: Figure 4 :

[0171] The gas in the material bin 20 is extracted for the second preset time;

[0172] The pressure value of the negative pressure feeding pipeline 61 between the storage chamber 11 and the material bin 20 is judged;

[0173] If the pressure value is lower than the second preset value, the material in the storage chamber 11 is controlled to feed into the material bin 20;

[0174] If the pressure value is equal to or greater than the second preset value, the negative pressure feeding pipeline 61 leaks air, and the central control alarms.

[0175] Exemplarily, the material feeding system further includes a fan 32. The fan 32 extracts the gas in the material bin 20 for the second preset time to stabilize the pressure in the negative pressure feeding pipeline 61 between the storage chamber 11 and the material bin 20. For example, the second preset time is 10 s.

[0176] The pressure value of the positive pressure feeding pipeline 62 between the storage chamber 11 and the material bin 20 is judged.

[0177] If the pressure value is lower than the second preset value, it indicates that the pressure in the positive pressure feeding pipeline 62 is normal, and the material in the storage chamber 11 is controlled to feed into the material bin 20.

[0178] If the pressure value is equal to or greater than the second preset value, the positive pressure feeding pipeline 62 leaks air, the central control alarms, the fan 32 is stopped, and the positive pressure feeding pipeline 62 is processed. For example, the second preset value is -35 kPa.

[0179] In this embodiment, the pressure value of the negative-pressure feeding pipeline 61 between the material storage chamber 11 and the material bin 20 is judged to detect whether the negative-pressure feeding pipeline 61 leaks air.

[0180] In some embodiments, with reference to Figure 4 , after the first preset time for feeding the material bin 20, it further includes:

[0181] Controlling the material storage chamber 11 to stop feeding towards the material bin 20;

[0182] Opening the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for a third preset time.

[0183] Exemplarily, controlling the material storage chamber 11 to stop feeding towards the material bin 20 means closing the feeding valve.

[0184] Opening the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for a third preset time, and cleaning the material on the filter element into the material bin 20. For example, the third preset time is 3 s.

[0185] In this embodiment, after the replenishment of materials is completed, the filter element is cleaned, and the material on the filter element is cleaned into the material bin 20.

[0186] In some embodiments, with reference to Figure 4 , if the material weight is lower than the first preset range, it further includes:

[0187] Obtaining the number of times the material in the material storage chamber 11 feeds towards the material bin 20;

[0188] If the number of times is lower than the first preset number of times, controlling the material in the material storage chamber 11 to feed towards the material bin 20;

[0189] If the number of times is equal to the first preset number of times, the feeding is out of tolerance, and the central control gives an alarm.

[0190] Exemplarily, obtaining the number of times the material in the material storage chamber 11 feeds towards the material bin 20. If the number of times is lower than the first preset number of times, controlling the material in the material storage chamber 11 to feed towards the material bin 20; if the number of times is equal to the first preset number of times, the feeding is out of tolerance, and the central control gives an alarm. The number of feeding times is too many, but the material in the material bin 20 still has not reached the first preset range, indicating that there is a problem with the feeding system and it needs to be processed. For example, the first preset number of times is 5 times.

[0191] In this embodiment, by obtaining the number of times the material in the material storage chamber 11 feeds towards the material bin 20, it is judged whether there is a problem with the replenishment program of the material bin 20.

[0192] In some embodiments, with reference to Figure 4 , after the material weight is within the first preset range, it further includes:

[0193] Clear the material in the negative pressure feeding pipeline 61 between the storage chamber 11 and the material bin 20 so that the material is transported to the material bin 20;

[0194] Open the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for the fourth preset time;

[0195] Obtain the pressure values on both sides of the filter element as the first pressure value and the second pressure value respectively;

[0196] Judge the pressure difference between the first pressure value and the second pressure value;

[0197] If the pressure difference is greater than or equal to the third preset value, the central control alarms;

[0198] If the pressure difference is less than the third preset value, the feeding is completed.

[0199] Exemplarily, clearing the material in the negative pressure feeding pipeline 61 between the storage chamber 11 and the material bin 20 is a pigging procedure, so that the material is transported to the material bin 20.

[0200] Open the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for the fourth preset time; obtain the pressure values on both sides of the filter element as the first pressure value and the second pressure value respectively; for example, the fourth preset time is 20s.

[0201] Judge the pressure difference between the first pressure value and the second pressure value; if the pressure difference is greater than or equal to the third preset value, it means that the pressure value is too large and the filter element may be blocked, and the central control alarms; if the pressure difference is less than the third preset value, it means that the pressure value is normal and the feeding is completed. For example, the third preset value is 1 kPa.

[0202] In this embodiment, the situation of the filter element is judged by obtaining the pressure values on both sides of the filter element and comparing them.

[0203] In some embodiments, referring to Figure 5 , the material feeding system is adapted to automatically feed the mixing bin 80, and a sending bin 40 is connected between the mixing bin 80 and the material bin 20. The control method of the material feeding system further includes: feeding the mixing bin 80,

[0204] Feeding the mixing bin 80 includes:

[0205] Obtain the material requirement value of the mixing bin 80;

[0206] Obtain the material weight in the material bin 20 and compare the material weight with the material requirement value;

[0207] If the material weight is lower than the material requirement value, perform replenishment of the material bin 20;

[0208] If the material weight is equal to or greater than the material requirement value, control the material in the material bin 20 to feed into the sending bin 40;

[0209] Start the feeding process of the feeding bin 40 towards the mixing bin 80.

[0210] Exemplarily, obtain the material requirement value of the mixing bin 80.

[0211] Obtain the material weight in the material bin 20, and compare the material weight in the material bin 20 with the material requirement value of the mixing bin 80.

[0212] If the material weight is lower than the material requirement value, replenish the material bin 20 to replenish the material bin 20; if the material weight is equal to or greater than the material requirement value, control the material in the material bin 20 to feed towards the feeding bin 40, weigh the material that needs to be transported into the feeding bin 40 through the first weighing device. After the feeding to the feeding bin 40 is completed, start the feeding process of the feeding bin 40 towards the mixing bin 80, so that the material in the feeding bin 40 is transported into the mixing bin 80 to complete the feeding of the mixing bin 80.

[0213] In this embodiment, by setting the feeding process of the mixing bin 80, the automatic feeding of the material from the feeding bin 40 to the mixing bin 80 is completed.

[0214] In some embodiments, referring to Figure 5 , controlling the material in the material bin 20 to feed towards the feeding bin 40 includes:

[0215] Turn on the air pressure balancing device between the material bin 20 and the feeding bin 40;

[0216] After the feeding of the material in the material bin 20 towards the feeding bin 40 is completed, turn off the air pressure balancing device.

[0217] Exemplarily, turn on the air pressure balancing device between the material bin 20 and the feeding bin 40 to balance the pressure between the material bin 20 and the feeding bin 40, facilitating the feeding of the material in the material bin 20 towards the feeding bin. After the feeding of the material in the material bin 20 towards the feeding bin 40 is completed, turn off the air pressure balancing device.

[0218] In this embodiment, by turning on the air pressure balancing device between the material bin 20 and the feeding bin 40 when the material bin 20 feeds towards the feeding bin 40, it is convenient to feed towards the feeding bin 40.

[0219] In some embodiments, referring to Figure 5 , when starting the feeding process of the feeding bin 40 towards the mixing bin 80:

[0220] If gas or material leakage is detected, the central control alarms and stops feeding.

[0221] Exemplarily, when starting the feeding process of the feeding silo 40 towards the mixing silo 80: If gas or material leakage is detected, the central control system alarms to remind the operators to handle it and stops the feeding.

[0222] The gas can be nitrogen. When the feeding silo 40 feeds materials towards the mixing silo 80: Compressed nitrogen is input into the feeding silo 40 to drive the materials in the feeding silo 40 to feed towards the mixing silo 80. If nitrogen leakage is detected, it indicates that there is a leakage in the positive pressure feeding pipeline 62 between the feeding silo 40 and the mixing silo 80. The central control system needs to alarm and stop the feeding.

[0223] In this embodiment, when starting the feeding process of the feeding silo 40 towards the mixing silo 80, it is detected in real time whether nitrogen or materials leak. If gas or material leakage is detected, the central control system alarms and stops the feeding.

[0224] Next, reference will be made to Figures 1 - 5 Describe a material feeding system and a control method for the material feeding system according to a specific embodiment of the present application.

[0225] The material feeding system is used to automatically feed the mixing silo 80. The material feeding system includes a material truck 10, a material silo 20, a gas source driving member 31, and a feeding silo 40. The material truck 10 has a storage cavity 11. The storage cavity 11 has an air inlet 12 and a discharge outlet 13. A one-way valve and a pressure regulating valve are provided at the air inlet 12 of the storage cavity 11, and a discharge valve is provided at the discharge outlet 13. The material silo 20 has a feeding port and a feeding valve is provided at the feeding port. The material truck 10 also has a stirring paddle 14 and a driving motor 15. The stirring paddle 14 is located in the storage cavity 11, and the driving motor 15 is adapted to drive the stirring paddle 14 to rotate. A first vibrator 16 is further provided on the outer peripheral wall of the storage cavity 11, and the first vibrator 16 is used to vibrate the outer peripheral wall of the storage cavity 11. A blower 32 is provided on one side of the material silo 20 to extract the gas in the material silo 20. A negative pressure feeding pipeline 61 is connected between the storage cavity 11 and the material silo 20.

[0226] The material cart 10 is connected between the air source driving part 31 and the material bin 20. The air inlet 12 of the storage cavity 11 is connected to the air source driving part 31, and the discharge port 13 of the storage cavity 11 is connected to the feed inlet of the material bin 20. Open the one-way valve, pressure regulating valve, feed valve, discharge valve, and the fan 32, and at the same time, turn on the driving motor 15. The air source driving part 31 conveys compressed nitrogen into the storage cavity 11 through the one-way valve, pressure regulating valve, and air inlet 12. The driving motor 15 drives the stirring paddle 14 to rotate for stirring the material. The first vibrator 16 is used to vibrate the outer peripheral wall of the storage cavity 11. The fan 32 is used to extract the air in the material bin 20. The compressed nitrogen pushes the material to move towards the negative pressure feeding pipeline 61 through the discharge port 13 and is conveyed into the material bin 20 through the negative pressure feeding pipeline 61. After the material in the storage cavity 11 is conveyed, replace another material cart 10 until the material in the material bin 20 reaches the set range.

[0227] A filter element is provided at the feed inlet, and a backflush valve is provided on one side of the filter element. After the feeding is completed, the backflush valve is opened to clean the filter element.

[0228] A gas phase balance device 50 is connected between the material bin 20 and the sending bin 40. The gas phase balance device 50 includes a second connecting pipe 51, a first switch valve 52, a second switch valve 53, a first pressure sensor, and a second pressure sensor. The first end of the second connecting pipe 51 is connected to the material bin 20, the first switch valve 52 is arranged adjacent to the first end, the second end of the second connecting pipe 51 is connected to the sending bin 40, and the second switch valve 53 is arranged adjacent to the second end. The first pressure sensor is located in the material bin 20, and the second pressure sensor is located in the sending bin 40. The first switch valve 52 and / or the second switch valve 53 is a pneumatic ball valve. The second connecting pipe 51 includes a plurality of sub-connecting pipes 511, and two adjacent sub-connecting pipes 511 are connected by an elastic joint 512. A feeding screw 21 is arranged in the material bin 20, and the feeding screw 21 is adapted to drive the material to be conveyed into the sending bin 40.

[0229] When the material bin 20 feeds materials into the sending bin 40, open the first switch valve 52 and the second switch valve 53 to adjust the pressure difference between the material bin 20 and the sending bin 40. The feeding screw 21 rotates to drive the material in the material bin 20 to feed into the sending bin 40. Use the first weighing device to weigh the materials that need to be conveyed into the sending bin 40, and use the second weighing device to weigh whether the materials conveyed into the sending bin 40 reach the set range. When conveying materials, use the first pressure sensor to detect the pressure value in the material bin 20 in real time, use the second pressure sensor to detect the pressure value in the sending bin in real time, and feedback it to the central control system 101.

[0230] A second vibrator 41 is provided on the outer peripheral wall of the sending silo 40, and a positive pressure feeding pipeline 62 is connected between the mixing silo 80 and the sending silo 40. Compressed nitrogen in the sending silo 40 drives the materials in the sending silo 40 to enter the mixing silo 80 through the positive pressure feeding pipeline 62, and the second vibrator 41 is used to vibrate the outer peripheral wall of the sending silo 40.

[0231] The material feeding system further includes a conveying leakage detection device and a dust removal device. The conveying leakage detection device includes a plurality of collection hoods and detection sensors. The negative pressure feeding pipeline 61 includes a plurality of connected third connecting pipes, and the positive pressure feeding pipeline 62 includes a plurality of connected fourth connecting pipes. The collection hoods are covered at the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes. The dust removal device includes a dust removal pipe 63, and one end of the dust removal pipe 63 is communicated with the collection hood. When nitrogen or materials leak to the collection hood at the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, the dust removal pipe 63 is used to clean the nitrogen or materials in the collection hood.

[0232] The material feeding system further includes a gas detection device 70. The gas detection device 70 includes a VOC detection sensor 71, a sulfide detection sensor 72, and an oxygen concentration detection sensor 73. The VOC detection sensor 71, the sulfide detection sensor 72, and the oxygen concentration detection sensor 73 are all located in the space where the material feeding system is located. The gas detection device 70 detects volatile organic compounds, sulfides, and the oxygen concentration in the air, and feeds back the detected results to the central control system 101, and the central control system 101 can make corresponding treatments on the detected results.

[0233] The control method of the material feeding system includes two procedures: replenishing the material silo 20 and feeding the mixing silo 80.

[0234] Replenishing the material silo 20 includes:

[0235] Obtaining the weight of the materials in the material silo 20;

[0236] If the material weight is lower than the first preset value, the storage cavity 11 of any one of the material trucks 10 is communicated with the material silo 20;

[0237] Using the fan 32 to extract the gas in the material silo 20 for 20 s;

[0238] Judging the pressure value of the positive pressure feeding pipeline 62 between the storage cavity 11 and the material silo 20;

[0239] If the pressure value is lower than -35 kPa, open the one-way valve, the feed valve, the drive motor 15, and the first vibrator 16, and the materials in the storage cavity 11 are fed towards the material silo 20;

[0240] If the pressure value is equal to or greater than -35 kPa, the negative pressure feeding pipeline 61 leaks air, and the central control issues an alarm;

[0241] Keep the material bin 20 feeding for 20 s, close the feeding valve, and stop feeding towards the material bin 20;

[0242] Open the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for a third preset time.

[0243] And judge the weight in the material bin 20;

[0244] If the material weight is within plus or minus 50 g of the set value within 10 s, clear the material in the positive pressure feeding pipeline 62 between the storage chamber 11 and the material bin 20 into the material bin 20;

[0245] Close the one-way valve, the feeding valve, the drive motor 15, and the first vibrator 16;

[0246] Open the backflush valve in the material bin 20 to clean the filter element in the material bin 20 for 20 s;

[0247] Obtain the pressure values on both sides of the filter element as the first pressure value and the second pressure value respectively;

[0248] Judge the pressure difference between the first pressure value and the second pressure value;

[0249] If the pressure difference is greater than or equal to the third preset value, the central control issues an alarm;

[0250] If the pressure difference value is less than the third preset value, the feeding is completed;

[0251] If the material weight is lower than minus 50 g of the set value within 10 s, obtain the number of times the material in the storage chamber 11 feeds towards the material bin 20;

[0252] If the number of times is less than 5 times, keep the material bin 20 feeding for 20 s, then close the feeding valve and stop feeding towards the material bin 20; judge the weight in the material bin 20 again until the material weight is within plus or minus 50 g of the set value within 10 s;

[0253] If the number of times is equal to 5 times, the feeding is out of tolerance and the central control issues an alarm.

[0254] The feeding of the mixing bin 80 includes:

[0255] Obtain the required material value of the mixing bin 80;

[0256] Obtain the material weight in the material bin 20 and compare the material weight with the required material value;

[0257] If the material weight is lower than the required material value, perform replenishment feeding for the material bin 20;

[0258] If the weight of the material is equal to or greater than the required material value, the pneumatic balance device between the material bin 20 and the sending bin 40 is opened.

[0259] After the feeding of the material in the material bin 20 towards the sending bin 40 ends, the pneumatic balance device is closed.

[0260] Control the feeding of the material in the material bin 20 towards the sending bin 40.

[0261] Start the feeding program of the sending bin 40 towards the mixing bin 80.

[0262] If nitrogen or material leakage is detected, the central control alarms and stops the feeding.

[0263] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "optionally", "further", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0264] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A material feeding system, characterized in that, The material feeding system is adapted to feed materials towards the mixing bin (80), and the material feeding system includes: A material truck (10), the material truck (10) having a storage cavity (11), the storage cavity (11) having an air inlet (12) and a discharge outlet (13); A material bin (20), the material bin (20) being communicated with the discharge outlet (13); A gas source driving member (31), one end of the gas source driving member (31) being connected to the air inlet (12), the gas source driving member (31) being adapted to convey the materials in the storage cavity (11) to the material bin (20) through the discharge outlet (13); A sending bin (40), the sending bin (40) being connected to the lower end of the material bin (20), the sending bin (40) being connected to the mixing bin (80), a first electronic weigher being provided in the material bin (20), a second electronic weigher being provided in the sending bin (40), and the material bin (20) being adapted to convey materials into the sending bin (40); A gas phase balance device (50), the gas phase balance device (50) being communicated between the sending bin (40) and the material bin (20) for adjusting the pressure difference between the sending bin (40) and the material bin (20); A negative pressure feeding pipeline (61), the negative pressure feeding pipeline (61) being connected between the storage cavity (11) and the material bin (20).

2. The material feeding system according to claim 1, characterized in that, The gas source driving member (31) is adapted to output nitrogen.

3. The material feeding system according to claim 2, characterized in that, The material truck (10) and the gas source driving member (31) are connected and communicated through a first connecting pipe. The material truck (10) further includes: a check valve and a pressure regulating valve, both the check valve and the pressure regulating valve being provided on the first connecting pipe. The check valve is used to make the first connecting pipe conduct unidirectionally from the gas source driving member (31) towards the storage cavity (11), and the pressure regulating valve is adapted to regulate the flow rate of the nitrogen.

4. The material feeding system according to claim 1, characterized in that, It further includes: A blower (32), the blower (32) being used to extract the gas in the material bin (20).

5. The material feeding system according to claim 1, wherein The material truck (10) further has a stirring paddle (14) and a driving motor (15), the stirring paddle (14) being located in the storage cavity (11), and the driving motor (15) being adapted to drive the stirring paddle (14) to rotate.

6. The material feeding system according to claim 1, wherein A first vibrator (16) is further provided on the outer peripheral wall of the storage cavity (11), and the first vibrator (16) is used to vibrate the outer peripheral wall of the storage cavity (11).

7. The material feeding system according to claim 1, characterized in that, The air inlet (12) is located at the upper end of the storage cavity (11), and the discharge outlet (13) is located at the lower end of the storage cavity (11).

8. The material feeding system according to claim 1, wherein The material bin (20) has a feed inlet, a filter element being provided at the feed inlet, and a backflush valve being provided on one side of the filter element, the backflush valve being used to clean the filter element.

9. The material feeding system according to claim 1, characterized in that A blanking screw (21) is provided in the material bin (20), and the blanking screw (21) is adapted to drive the materials to be conveyed into the sending bin (40).

10. The material feeding system according to claim 1, wherein, A second vibrator (41) is provided on the outer peripheral wall of the sending bin (40), and the second vibrator (41) is used to vibrate the outer peripheral wall of the sending bin (40).

11. The material feeding system according to claim 1, characterized in that, The gas phase balance device (50) includes a second connecting pipe (51), a first switching valve (52), a second switching valve (53), a first pressure sensor, and a second pressure sensor. The first end of the second connecting pipe (51) is connected to the material bin (20), the first switching valve (52) is arranged adjacent to the first end, the second end of the second connecting pipe (51) is connected to the sending bin (40), the second switching valve (53) is arranged adjacent to the second end, the first pressure sensor is located inside the material bin (20), and the second pressure sensor is located inside the sending bin (40).

12. The material feeding system according to claim 11, wherein The first switching valve (52) and / or the second switching valve (53) is a pneumatic ball valve.

13. The material feeding system according to claim 11, characterized in that, The second connecting pipe (51) includes a plurality of sub-connecting pipes (511), and two adjacent sub-connecting pipes (511) are connected by an elastic joint (512).

14. The material feeding system according to claim 1, wherein Further included are: A positive pressure feeding pipeline (62) and a conveying leakage detection device. The positive pressure feeding pipeline (62) is connected between the sending bin (40) and the stirring bin (80). The negative pressure feeding pipeline (61) includes a plurality of connected third connecting pipes. The positive pressure feeding pipeline (62) includes a plurality of connected fourth connecting pipes. The conveying leakage detection device includes a plurality of collecting covers and detection sensors. The collecting covers are wrapped around the joints of two adjacent third connecting pipes and the joints of two adjacent fourth connecting pipes, and the detection sensors are located inside the collecting covers.

15. The material feeding system according to claim 14, wherein Further included are: A dust removal device. The dust removal device includes a dust removal pipe (63), and one end of the dust removal pipe (63) is communicated with the collecting cover.

16. The material feeding system according to claim 14, wherein, Further included is a gas detection device (70). The gas detection device (70) includes a VOC detection sensor (71), a sulfide detection sensor (72), and an oxygen concentration detection sensor (73). The VOC detection sensor (71), the sulfide detection sensor (72), and the oxygen concentration detection sensor (73) are all located in the space where the material feeding system is located.

17. A control method for a material feeding system, characterized in that, For controlling the feeding of the material feeding system according to any one of claims 1-16, the control method of the material feeding system includes: feeding the material bin (20), and the feeding of the material bin (20) includes: Obtaining the weight of the material inside the material bin (20); If the material weight is lower than a first preset value, then making the storage cavity (11) of any one of the material trucks (10) communicate with the material bin (20); Controlling the material inside the storage cavity (11) to feed towards the material bin (20); Making the material bin (20) feed for a first preset time, and judging the weight inside the material bin (20); If the material weight is within a first preset range, the feeding is completed; If the material weight is lower than the first preset range, then continue to control the material inside the storage cavity (11) to feed towards the material bin (20) for the first preset time, and judge the weight inside the material bin (20).

18. The control method of the material feeding system according to claim 17, wherein, Before controlling the material inside the storage cavity (11) to feed towards the material bin (20) includes: Extract the gas in the material bin (20) for a second preset time; Judge the pressure value of the negative pressure feeding pipeline (61) between the storage chamber (11) and the material bin (20); If the pressure value is lower than the second preset value, control the material in the storage chamber (11) to feed towards the material bin (20); If the pressure value is equal to or greater than the second preset value, the negative pressure feeding pipeline (61) leaks, and the central control alarms.

19. The control method of the material feeding system according to claim 17, characterized in that, After the material bin (20) feeds for the first preset time, it further includes: Control the storage chamber (11) to stop feeding towards the material bin (20); Open the backflush valve in the material bin (20) to clean the filter element in the material bin (20) for a third preset time.

20. The control method of the material feeding system according to claim 17, wherein If the material weight is lower than the first preset range, it further includes: Obtain the number of times the material in the storage chamber (11) feeds towards the material bin (20); If the number of times is lower than the first preset number of times, control the material in the storage chamber (11) to feed towards the material bin (20); If the number of times is equal to the first preset number of times, the feeding tolerance is exceeded, and the central control alarms.

21. The control method of the material feeding system according to claim 17, characterized in that, After the material weight is within the first preset range, it further includes: Clear the material in the negative pressure feeding pipeline (61) between the storage chamber (11) and the material bin (20) so that the material is transported to the material bin (20); Open the backflush valve in the material bin (20) to clean the filter element in the material bin (20) for a fourth preset time; Obtain that the pressure values on both sides of the filter element are the first pressure value and the second pressure value respectively; Judge the pressure difference between the first pressure value and the second pressure value; If the pressure difference is greater than or equal to the third preset value, the central control alarms; If the pressure difference is less than the third preset value, the feeding is completed.

22. The control method of the material feeding system according to claim 17, wherein The material feeding system is suitable for feeding towards the mixing bin (80). A sending bin (40) is connected between the mixing bin (80) and the material bin (20). The control method of the material feeding system further includes: feeding the mixing bin (80). The feeding of the mixing bin (80) includes: Obtain the material requirement value of the mixing bin (80); Take the material weight in the material bin (20) and compare the material weight with the material requirement value; If the material weight is lower than the material requirement value, perform replenishment of the material bin (20); If the material weight is equal to or greater than the material requirement value, control the material in the material bin (20) to feed towards the sending bin (40); Start the feeding program of the sending bin (40) towards the mixing bin (80).

23. The control method of the material feeding system according to claim 22, characterized in that, Controlling the material in the material bin (20) to feed towards the sending bin (40) includes: Open the air pressure balancing device between the material bin (20) and the sending bin (40); After the feeding of the material in the material bin (20) towards the sending bin (40) ends, close the air pressure balancing device.

24. The control method of the material feeding system according to claim 22, wherein When starting the feeding program of the sending bin (40) towards the mixing bin (80): If gas or material leakage is detected, the central control alarms and stops feeding.

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