Negative pressure suction device for processing negative electrode material

Abstract

The present application relates to the technical field of negative electrode material processing, in particular to a negative pressure suction device for negative electrode material processing. The device comprises a suction mechanism and a plate separating and material guiding mechanism installed on the suction mechanism. The suction mechanism comprises a feeding end and a discharging end. The plate separating and material guiding mechanism comprises a material separating and cleaning assembly arranged in the discharging end of the suction mechanism. The material separating and cleaning assembly is used to clean the negative electrode material adhered to the suction mechanism. A directional closing assembly is installed on the cleaning assembly. The directional closing assembly is used to change the state of the negative electrode material discharged by the material separating and cleaning assembly and control the position of the negative electrode material discharged by the material separating and cleaning assembly. A positioning and guiding mechanism is arranged on the directional closing assembly and used to drive the directional closing assembly to move. The present application guides the negative electrode material to be dispersed and discharged through the discharging pipe by the included angle formed between the directional plate and the material separating plate, solves the problem that the negative electrode material is gathered in one place after being output, and realizes the uniform dispersion and discharge of the negative electrode material.

Description

Technical Field

[0001] This invention relates to the field of negative electrode material processing technology, and more specifically, to a negative pressure suction device for processing negative electrode materials. Background Technology

[0002] The negative electrode of a power battery is generally a graphite negative electrode. The production steps of the graphite negative electrode include mixing natural spherical graphite and asphalt, heating and impregnating the mixture under a preset pressure, softening and flowing the asphalt to fill the pores inside the natural spherical graphite, cooling to obtain an intermediate product, graphitizing the intermediate product, and then crushing and sieving to obtain the graphite negative electrode material.

[0003] Therefore, during the processing, a suction device is needed to transport the pulverized negative electrode material to the next processing step. Currently, the suction device usually uses a negative pressure fan in conjunction with a conveying pipe for extraction. However, during the process of the pulverized negative electrode material being transported by the negative pressure fan, some fragments of the negative electrode material will adhere to the conveying pipe of the negative pressure fan, increasing the probability of blockage in the conveying pipe.

[0004] Furthermore, the current feed pipe is a tube structure. When the negative electrode material is transported through the feed pipe, the output negative electrode material will accumulate in one place. In other words, it is not possible to achieve convenient multi-position feeding, which affects the subsequent processing operations of the negative electrode material. Summary of the Invention

[0005] The purpose of this invention is to provide a negative pressure suction device for processing negative electrode materials, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a negative pressure suction device for processing negative electrode materials, including a suction mechanism and a separating and guiding mechanism mounted on the suction mechanism. The suction mechanism includes an inlet end and a outlet end. The separating and guiding mechanism includes a separating and cleaning component disposed within the outlet end of the suction mechanism. The separating and cleaning component is used to clean the negative electrode material adhering to the suction mechanism. A directional sealing component is mounted on the cleaning component. The directional sealing component is used to change the state of the negative electrode material discharged by the separating and cleaning component and to control the position of the negative electrode material discharged by the separating and cleaning component. A positioning guide mechanism is provided on the directional sealing component. The positioning guide mechanism is used to drive the directional sealing component to move.

[0007] As a further improvement to this technical solution, the suction mechanism includes a negative pressure fan, with a discharge pipe and a feed pipe respectively connected to both ends of the negative pressure fan. The feed pipe is the feed end mentioned above, and the discharge pipe is the discharge end mentioned above. The material separation and cleaning component, the directional sealing component, and the positioning and guiding mechanism are all arranged inside the discharge pipe.

[0008] As a further improvement to this technical solution, an extension tube is provided on the feed pipe, the extension tube and the feed pipe are connected by bolts, and a baffle is inserted into one end of the extension tube.

[0009] As a further improvement to this technical solution, the material distribution and cleaning assembly includes two material distribution plates installed inside the discharge pipe. The material distribution plates are provided with discharge holes, and the two material distribution plates are hinged together. The directional sealing assembly includes a directional plate for supporting the material distribution plates, and the directional plate is mounted on a positioning guide mechanism.

[0010] As a further improvement to this technical solution, the directional plate and the material distribution plate are connected by a directional plate connecting part. The positioning and guiding mechanism includes a positioning plate disposed in the discharge pipe. The positioning plate and the directional plate are connected by a positioning plate connecting part. A transmission block is disposed on the side of the positioning plate. A material guiding transmission mechanism is disposed on the transmission block. The material guiding transmission mechanism is used to control the vertical movement of the transmission block.

[0011] As a further improvement to this technical solution, a moving groove is provided on the inner wall of the discharge pipe, the transmission block is slidably disposed in the moving groove, two positioning plates are provided, and a bidirectional cylinder is installed between the two positioning plates. The bidirectional cylinder is used to apply a thrust to the positioning plates, wherein:

[0012] In the initial state, there is an angle between the orientation plate and the distribution plate, which allows the negative electrode material to be discharged through the discharge port of the distribution plate. The negative electrode material falling through the discharge port is guided by the orientation plate, which disperses the negative electrode material.

[0013] When the positioning plate is pushed, it controls the movement of the orientation plate. The orientation plate gradually approaches the distribution plate, blocking the discharge port on the distribution plate. The orientation plate and the distribution plate form a discharge end, and the negative electrode material is guided to be discharged from different positions through the feeding end.

[0014] As a further improvement to this technical solution, a support is installed at one end of the directional plate near the directional plate connection part. The support is used to support the material distribution plate so that the material distribution plate is in an oriented state.

[0015] As a further improvement to this technical solution, the feeding transmission mechanism includes a transmission screw embedded in a moving groove. The transmission screw is threadedly connected to a transmission block. One end of the transmission screw is connected to a driven wheel, and a driving wheel is meshed on the driven wheel. The driving wheel is driven by a motor installed on the discharge pipe.

[0016] As a further improvement to this technical solution, two movable grooves are opened on the side wall of the discharge pipe. A transmission screw is embedded in each of the two movable grooves, and one driven wheel and one driving wheel are provided. The driven wheel and the driving wheel are both installed on one of the transmission screws. Each transmission screw is equipped with a pulley, and the two pulleys are connected by a belt.

[0017] As a further improvement to this technical solution, the end of the discharge pipe is provided with an extension, and one end of the transmission screw is disposed in the extension.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the negative pressure suction device for processing negative electrode materials, in the initial state, the negative electrode material is guided to be dispersed and discharged through the discharge pipe by the included angle formed between the directional plate and the distribution plate, which solves the problem of negative electrode material agglomerating in one place after output and realizes the uniform dispersion and discharge of negative electrode material.

[0020] 2. In the negative pressure suction device for processing the negative electrode material, the material distribution plate moves vertically back and forth in the discharge pipe. The material distribution plate removes the negative electrode material adhering to the inner wall of the discharge pipe, reducing the possibility of blockage in the discharge pipe.

[0021] 3. In the negative pressure suction device for processing negative electrode materials, the discharge pipe extends through the material distribution plate and the directional plate. The directional plate is close to the material distribution plate, so that the directional plate and the material distribution plate form a material inlet, which guides the negative electrode material discharged from the discharge pipe to both sides, realizing multi-position feeding of negative electrode material, which facilitates different processing operations on negative electrode material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is one of the cross-sectional views of the suction mechanism of the present invention;

[0024] Figure 3 This is a second cross-sectional view of the material suction mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the plate-separating and feeding mechanism of the present invention;

[0026] Figure 5 This is a partial structural diagram of the discharge pipe of the present invention;

[0027] Figure 6 In this invention Figure 5 A schematic diagram of the structure at point A;

[0028] Figure 7 This is a structural exploded view of the plate-separating feeding mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the positioning and guiding mechanism of the present invention.

[0030] The meanings of the labels in the diagram are as follows:

[0031] 1. Suction mechanism; 11. Negative pressure fan; 12. Feed pipe; 13. Discharge pipe; 14. Extension pipe; 141. Baffle; 15. Extension section;

[0032] 2. Material feeding mechanism; 21. Material feeding plate; 22. Orientation plate; 221. Orientation plate connecting part; 222. Support part; 23. Positioning and guiding mechanism; 231. Positioning plate; 232. Positioning plate connecting part; 233. Transmission block; 234. Two-way cylinder; 24. Material feeding transmission mechanism; 241. Transmission screw; 242. Driven wheel; 243. Drive wheel; 244. Pulley; 245. Belt. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Please see Figures 1-8 As shown, this embodiment provides a negative pressure suction device for processing negative electrode materials, including a suction mechanism 1 and a plate-separating and guiding mechanism 2 installed on the suction mechanism 1. The suction mechanism 1 includes a feeding end and a discharging end. In this solution, the negative electrode material is extracted through the extraction end of the suction mechanism 1 and discharged through the discharge end of the suction mechanism 1 to realize the transfer of the negative electrode material.

[0036] To achieve the cleaning of negative electrode material adhering to the inner wall of the discharge end and the discharge of negative electrode material from multiple locations:

[0037] The separating and feeding mechanism 2 includes a material separating and cleaning component disposed in the discharge end of the feeding mechanism 1. The material separating and cleaning component is used to clean the negative electrode material attached to the feeding mechanism 1. A directional sealing component is installed on the cleaning component. The directional sealing component is used to change the state of the negative electrode material discharged by the material separating and cleaning component and to control the position of the negative electrode material discharged by the material separating and cleaning component. A positioning guide mechanism 23 is provided on the directional sealing component. The positioning guide mechanism 23 is used to drive the directional sealing component to move.

[0038] When the negative electrode material is extracted for a long time, causing the inner wall of the discharge end of the suction mechanism 1 to be covered with fragmented negative electrode material, the positioning guide mechanism 23 drives the directional sealing component to move, so that the directional sealing component controls the material dispensing and cleaning component to move up and down inside the discharge end of the suction mechanism 1, thereby cleaning the inner wall of the discharge end of the suction mechanism 1 and reducing the blockage that occurs during the discharge process of the suction mechanism 1.

[0039] During the material discharge process and under the above conditions, there is an angle between the material distribution and cleaning component and the directional sealing component, which is the space required for the negative electrode material to be discharged through the material distribution and cleaning component. Due to the existence of the angle, the negative electrode material is guided by the material distribution and cleaning component and the directional sealing component that form the angle during the output process, so that the negative electrode material will not accumulate in the middle during the output, but will be dispersed and fall to both sides, so that the material is evenly distributed and discharged.

[0040] When the negative electrode material needs to be discharged in multiple locations during the discharge process, the positioning guide mechanism 23 controls the directional sealing component and the material distribution and cleaning component to move downwards. The positioning guide mechanism 23 moves away from the discharge end of the suction mechanism 1, and the directional sealing component applies an expanding force to the material distribution and cleaning component, causing the material distribution and cleaning component to be in an open state. The directional sealing component contacts the material distribution and cleaning component, closing the material distribution and cleaning component, so that the material distribution and cleaning component forms a guide end to guide the negative electrode material to be discharged to both sides, so that the negative electrode material is discharged in multiple locations, which meets the requirements for further processing of the negative electrode material.

[0041] The above solution will be further elaborated to facilitate understanding and implementation by professionals in this field:

[0042] The suction mechanism 1 includes a negative pressure fan 11. The two ends of the negative pressure fan 11 are respectively connected to a discharge pipe 13 and a feed pipe 12. The feed pipe 12 is the feed end mentioned above, and the discharge pipe 13 is the discharge end mentioned above. The material separation and cleaning component, the directional sealing component, and the positioning and guiding mechanism 23 are all arranged inside the discharge pipe 13. The negative electrode material source is contacted through the feed pipe 12. The negative pressure fan 11 is driven to run. The negative pressure fan 11 controls the feed pipe 12 to draw the negative electrode material and discharge it through the discharge pipe 13, thus completing the normal suction and conveying process.

[0043] Considering that the negative electrode material source is located far away, which is not conducive to the extraction of negative electrode material, an extension tube 14 is provided on the feed pipe 12. The extension tube 14 and the feed pipe 12 are connected by bolts. A baffle 141 is inserted into one end of the extension tube 14. The extension tube 14 extends from the feed pipe 12 close to the negative electrode material source. The extension tube 14 is locked by bolts to facilitate the extraction of negative electrode material. The baffle 141 closes the extension tube 14 to prevent foreign objects from entering the extension tube 14, ensuring that the use of the entire suction mechanism 1 is not affected. Foreign objects include bags of a certain volume used to hold negative electrode materials in the workshop.

[0044] The material distribution and cleaning assembly includes two material distribution plates 21 installed inside the discharge pipe 13. Each material distribution plate 21 has a discharge hole, and the two material distribution plates 21 are hinged together. The directional sealing assembly includes a directional plate 22 for supporting the material distribution plates 21. The directional plate 22 is mounted on the positioning guide mechanism 23. The negative electrode material is discharged downward through the discharge hole on the material distribution plate 21. Because the two material distribution plates 21 are hinged together, the material distribution plates 21 can be easily rotated and adjusted, which is conducive to guiding the negative electrode material to be discharged from different positions.

[0045] Secondly, the directional plate 22 and the material distribution plate 21 are connected by the directional plate connecting part 221. The positioning and guiding mechanism 23 includes a positioning plate 231 set in the discharge pipe 13. The positioning plate 231 and the directional plate 22 are connected by the positioning plate connecting part 232. A transmission block 233 is set on the side of the positioning plate 231. A material guiding transmission mechanism 24 is set on the transmission block 233. The material guiding transmission mechanism 24 is used to control the vertical movement of the transmission block 233. By driving the transmission block 233 to move through the material guiding transmission mechanism 24, the positioning plate 231, the directional plate 22 and the material distribution plate 21 move up and down in the lower discharge pipe 13, so as to realize the above-mentioned cleaning operation of the negative electrode material attached to the inner wall of the middle discharge pipe 13.

[0046] The guiding effect of the negative electrode material is explained:

[0047] The inner wall of the discharge pipe 13 is provided with a moving groove, and the transmission block 233 is slidably disposed in the moving groove. Two positioning plates 231 are provided, and a two-way cylinder 234 is installed between the two positioning plates 231. The two-way cylinder 234 is used to apply a thrust to the positioning plates 231, wherein:

[0048] In the initial state, there is an angle between the orientation plate 22 and the distribution plate 21, which allows the negative electrode material to be discharged through the discharge port of the distribution plate 21. The negative electrode material falling through the discharge port is guided by the orientation plate 22, causing the negative electrode material to be discharged in a dispersed manner. The existence of the angle is to facilitate the discharge of the negative electrode material through the discharge pipe 13. Because the angle of the angle is affected by the orientation plate 22, the negative electrode material will be dispersed and fall in a small range within the discharge pipe 13 when it is discharged, so that the negative electrode material is discharged evenly, which is conducive to the continuous discharge of the negative electrode material in the future.

[0049] When the positioning plate 231 is pushed, causing it to control the movement of the orientation plate 22, the orientation plate 22 gradually approaches the distribution plate 21, blocking the discharge port on the distribution plate 21. This forms a discharge end between the orientation plate 22 and the distribution plate 21, guiding the negative electrode material out from different positions through the feeding end. The feeding transmission mechanism 24 controls the transmission block 233 to extend downwards, and the bidirectional cylinder 234 drives the positioning plate 231 to expand to both sides. Furthermore, the positioning plate 231 controls the orientation plate 22 to move, so that when the orientation plate 22 contacts the distribution plate 21, it blocks the discharge port, forming a feeding end between the distribution plate 21 and the orientation plate 22. When the material distribution plate 21 and the orientation plate 22 leave the discharge pipe 13, the positioning plate 231 pushes the orientation plate 22 outward again, so that the orientation plate 22 exerts a thrust on the material distribution plate 21 again, forcing the material distribution plate 21 to change its current tilt state. Therefore, after the material distribution plate 21 is rotated under force, the tilt of the material distribution plate 21 increases, so that the material distribution plate 21 and the orientation plate 22 form a material guiding end, guiding the negative electrode material discharged from the discharge pipe 13 to fall to different positions, which facilitates different processing operations on the negative electrode material. The material guiding end in this scheme refers to the structure formed by the combination of the material distribution plate 21 and the orientation plate 22 to guide the negative electrode material to be discharged to the side.

[0050] Then, a support part 222 is installed at one end of the directional plate 22 near the directional plate connection part 221. The support part 222 is used to support the material distribution plate 21, so that the material distribution plate 21 is in an oriented state. By supporting and restricting the material distribution plate 21 through the support part 222, the situation that the two material distribution plates 21 are hinged and will rotate under the pressure of the negative electrode material is solved, ensuring that the material distribution plate 21 is in an inclined state in the discharge pipe 13, and the discharge state can be changed according to specific needs.

[0051] To facilitate control of the slitting and feeding mechanism 2, the feeding transmission mechanism 24 includes a transmission screw 241 embedded in a moving groove. The transmission screw 241 is threadedly connected to the transmission block 233. One end of the transmission screw 241 is connected to a driven wheel 242, and a driving wheel 243 is meshed on the driven wheel 242. The driving wheel 243 is driven by a motor installed on the discharge pipe 13. The motor drives the driving wheel 243 to rotate, which in turn drives the driven wheel 242 to rotate, thereby causing the transmission screw 241 to rotate and drive the transmission block 233 to rotate. The moving block 233 moves up and down in the moving groove, causing the material distribution plate 21, the orientation plate 22 and the positioning plate 231 to change their positions, which facilitates the cleaning and discharge of the negative electrode material. In this solution, since the transmission screw 241 needs to be set horizontally with the discharge pipe 13, and if the motor is set inside the discharge pipe 13, it will obstruct the material flow of the discharge pipe 13. Therefore, by connecting the driven wheel 242 with the driving wheel 243, the motor is driven and controlled outside the discharge pipe 13, which facilitates the discharge of the negative electrode material from the discharge pipe 13.

[0052] To reduce costs, two movable grooves are provided on the side wall of the discharge pipe 13. Each groove contains a drive screw 241, and one driven wheel 242 and one driving wheel 243 are also provided. Both the driven wheel 242 and the driving wheel 243 are mounted on one of the drive screws 241. Each drive screw 241 is equipped with a pulley 244, and the two pulleys 244 are connected by a belt 245. Through the transmission connection between the pulleys 244 and the belt 245, the material can be discharged from one of the drive screws 241. The rotation of the other transmission screw 241 is controlled to realize the rotation of both transmission screws 241. Since there are two positioning plates 231 and transmission blocks 233, it is convenient to control the movement of the two transmission blocks 233 at the same time and save costs. Secondly, a housing is installed on the outside of the driven wheel 242, the driving wheel 243, the pulley 244 and the belt 245. The housing can prevent the negative electrode material from contacting the driven wheel 242, the driving wheel 243, the pulley 244 and the belt 245, ensuring the normal use of the entire device.

[0053] Secondly, an extension 15 is provided at the end of the discharge pipe 13, and one end of the transmission screw 241 is located inside the extension 15. With the extension 15, when the transmission block 233 moves downward and is inside the extension 15, the guide end formed by the combination of the distribution plate 21 and the orientation plate 22 can expand outward to guide the negative electrode material to be discharged from different positions, thereby realizing the rapid discharge of the negative electrode material.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure suction device for processing negative electrode materials, comprising a suction mechanism (1) and a separating and guiding mechanism (2) mounted on the suction mechanism (1), wherein the suction mechanism (1) comprises a feeding end and a discharging end, characterized in that: The separating material feeding mechanism (2) includes a material separating and cleaning component disposed in the discharge end of the suction mechanism (1). The material separating and cleaning component is used to clean the negative electrode material attached to the suction mechanism (1). A directional sealing component is installed on the cleaning component. The directional sealing component is used to change the state of the negative electrode material discharged by the material separating and cleaning component and to control the position of the negative electrode material discharged by the material separating and cleaning component. A positioning guide mechanism (23) is provided on the directional sealing component. The positioning guide mechanism (23) is used to drive the directional sealing component to move. The suction mechanism (1) includes a negative pressure fan (11), and the two ends of the negative pressure fan (11) are respectively connected to a discharge pipe (13) and a feed pipe (12). The feed pipe (12) is the feed end, and the discharge pipe (13) is the discharge end. The material separation and cleaning component, the directional sealing component, and the positioning and guiding mechanism (23) are all installed inside the discharge pipe (13). The material sorting and cleaning assembly includes two material sorting plates (21) installed in the discharge pipe (13). The material sorting plates (21) are provided with discharge holes, and the two material sorting plates (21) are hinged together. The directional sealing assembly includes a directional plate (22) for supporting the material sorting plates (21). The directional plate (22) is set on the positioning guide mechanism (23). The directional plate (22) and the material distribution plate (21) are connected by the directional plate connecting part (221). The positioning guide mechanism (23) includes a positioning plate (231) disposed in the discharge pipe (13). The positioning plate (231) and the directional plate (22) are connected by the positioning plate connecting part (232). A transmission block (233) is provided on the side of the positioning plate (231). A material feeding transmission mechanism (24) is provided on the transmission block (233). The material feeding transmission mechanism (24) is used to control the vertical movement of the transmission block (233). The inner wall of the discharge pipe (13) is provided with a moving groove, and the transmission block (233) is slidably disposed in the moving groove. Two positioning plates (231) are provided, and a two-way cylinder (234) is installed between the two positioning plates (231). The two-way cylinder (234) is used to apply a thrust to the positioning plates (231), wherein: In the initial state, there is an angle between the orientation plate (22) and the distribution plate (21), so that the negative electrode material is discharged through the discharge port of the distribution plate (21), and the negative electrode material falling through the discharge port will be guided by the orientation plate (22) so that the negative electrode material is dispersed and discharged. When the positioning plate (231) is pushed, the positioning plate (231) controls the movement of the orientation plate (22). The orientation plate (22) gradually approaches the distribution plate (21), so that the orientation plate (22) blocks the discharge port on the distribution plate (21). The orientation plate (22) and the distribution plate (21) form a discharge end, and the negative electrode material is guided to be discharged from different positions through the feeding end.

2. The negative pressure suction device for processing negative electrode materials according to claim 1, characterized in that: An extension tube (14) is provided on the feed pipe (12). The extension tube (14) and the feed pipe (12) are connected by bolts. A baffle (141) is inserted into one end of the extension tube (14).

3. The negative pressure suction device for processing negative electrode materials according to claim 1, characterized in that: The directional plate (22) has a support part (222) installed at one end near the directional plate connection part (221). The support part (222) is used to support the material distribution plate (21) so that the material distribution plate (21) is in an oriented state.

4. The negative pressure suction device for processing negative electrode materials according to claim 3, characterized in that: The feeding transmission mechanism (24) includes a transmission screw (241) embedded in a moving groove. The transmission screw (241) is threadedly connected to the transmission block (233). One end of the transmission screw (241) is connected to a driven wheel (242). A driving wheel (243) is meshed on the driven wheel (242). The driving wheel (243) is driven by a motor installed on the discharge pipe (13).

5. The negative pressure suction device for processing negative electrode materials according to claim 4, characterized in that: Two movable slots are provided on the side wall of the discharge pipe (13). A transmission screw (241) is embedded in each of the two movable slots. A driven wheel (242) and a driving wheel (243) are each provided. The driven wheel (242) and the driving wheel (243) are both installed on one of the transmission screws (241). A pulley (244) is installed on each of the transmission screws (241). The two pulleys (244) are connected by a belt (245).

6. The negative pressure suction device for processing negative electrode materials according to claim 5, characterized in that: The end of the discharge pipe (13) is provided with an extension (15), and one end of the transmission screw (241) is located in the extension (15).

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