Air-blast cavity structure and powder removal device for pole piece

Abstract

This application discloses a gas explosion chamber structure and a de-powdering device for electrode de-powdering, relating to the field of electrode de-powdering technology, and aiming to solve the problem of how to improve the purity of electrode powder recovered from waste lithium batteries. The gas explosion chamber structure includes a chamber body and multiple isolation valves. The chamber body contains a gas explosion chamber, multiple air inlets, and a feed inlet. Multiple isolation valves are horizontally spaced within the gas explosion chamber to divide it into multiple sub-chambers. Each air inlet is connected to a corresponding sub-chamber for introducing a high-pressure pulsed airflow. The two outermost sub-chambers are the first and second sub-chambers, respectively, and the feed inlet is connected to the first sub-chamber. In any two adjacent sub-chambers, the one closer to the feed inlet is the front sub-chamber, and the one farther from the feed inlet is the rear sub-chamber. When the airflow pressure in the front sub-chamber reaches a preset pressure, the isolation valve opens, allowing material in the front sub-chamber to enter the rear sub-chamber.

Description

Technical Field

[0001] This application relates to the field of electrode de-powdering technology, and in particular to an air-explosion cavity structure and de-powdering device for electrode de-powdering. Background Technology

[0002] To reduce the environmental pollution caused by waste lithium batteries, they are usually subjected to pyrolysis. Then, the electrodes of the pyrolyzed waste lithium batteries are de-powdered to obtain the metal foil and electrode powder, which can then be reused.

[0003] In existing technologies, electrode sheets are usually crushed by hammer mills to recover electrode powder. However, the recovered electrode powder has a high metal powder content, resulting in low purity. Utility Model Content

[0004] The purpose of this application is to provide a gas explosion chamber structure and a de-powdering device for electrode de-powdering, aiming to solve the problem of how to improve the purity of electrode powder recovered from waste lithium batteries.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a gas explosion chamber structure for electrode de-powdering. The gas explosion chamber structure for electrode de-powdering includes a chamber body and multiple isolation valves. The chamber body is provided with a gas explosion chamber, multiple air inlets, a feed inlet, a dust removal port, and a discharge port. The multiple isolation valves are horizontally spaced within the gas explosion chamber and connected to the chamber body to divide the gas explosion chamber into multiple horizontally arranged sub-chambers. The multiple air inlets are located at the bottom of the chamber body, and each air inlet is connected to a corresponding sub-chamber for introducing high-pressure pulsed airflow into the corresponding sub-chamber. The two outermost sub-chambers are... The chambers are divided into a first sub-chamber and a second sub-chamber. The feed inlet is located at the top of the chamber body and is connected to the first sub-chamber for conveying electrode sheets into the first sub-chamber. The dust removal port is located at the top of the chamber body and the discharge port is located at the bottom of the chamber body. Both the dust removal port and the discharge port are connected to the second sub-chamber. In any two adjacent sub-chambers, the sub-chamber closer to the feed inlet is the front sub-chamber, and the sub-chamber farther from the feed inlet is the rear sub-chamber. When the airflow pressure in the front sub-chamber reaches the preset pressure, the isolation valve located between the front and rear sub-chambers opens to allow the material in the front sub-chamber to enter the rear sub-chamber.

[0006] The gas explosion chamber structure for electrode powder removal provided in this application allows high-pressure pulsed airflow to be introduced into each sub-chamber of the gas explosion chamber structure through multiple air inlets. After entering the sub-chamber, the high-pressure pulsed airflow impacts the material within, causing it to vibrate under the strong airflow generated by the pulsed gas explosion, thereby detaching the electrode powder from the electrode. In this way, compared to hammer mill crushing for electrode powder removal, the high-pressure pulsed airflow does not cause electrode damage. That is, after the electrode powder is detached from the electrode through impact vibration, the metal foil remains largely undamaged. Therefore, the metal powder content in the electrode powder after separation of the electrode and electrode powder is low, thus improving the purity of the recovered electrode powder.

[0007] The feed inlet is located at the top of the cavity body and communicates with the first sub-chamber. Material can enter the first sub-chamber by gravity through the feed inlet, thus facilitating material entry. After the material enters the first sub-chamber, a high-pressure pulsed airflow is introduced into the first sub-chamber through the air inlet, which is also connected to the first sub-chamber. This causes the material in the first sub-chamber to be impacted and vibrated under the action of the high-pressure pulsed airflow, thereby causing the electrode powder on the material to detach.

[0008] When the airflow pressure in the front sub-chamber reaches a preset pressure, the isolation valve between the front and rear sub-chambers opens, allowing material in the front sub-chamber to enter the rear sub-chamber. After the material in the first sub-chamber is de-powdered and the pressure reaches the preset pressure, the isolation valve between the first sub-chamber and the adjacent sub-chamber opens. At this time, the material in the first sub-chamber enters the adjacent sub-chamber under the action of airflow. High-pressure pulsed airflow is then introduced into the adjacent sub-chamber through the air inlet connected to it, de-powdering the material entering the adjacent sub-chamber. The material then enters the next sub-chamber for further de-powdering. In other words, multiple isolation valves open sequentially along the direction from the first sub-chamber to the second sub-chamber, allowing material to enter each sub-chamber sequentially for de-powdering. This multiple air-blast de-powdering process ensures more thorough removal of the fine powder from the material, improving the de-powdering effect.

[0009] In some embodiments, the isolation valve includes a valve plate, the upper end of which is connected to the upper end of the cavity body, and the lower end of which is swayable in the horizontal direction to open or close two sub-cavities on both sides of the isolation valve.

[0010] In some embodiments, the isolation valve further includes an elastic element, one end of which is connected to the valve plate and the other end of which is connected to the cavity body. The elastic element is used to apply a force to the valve plate to block the two sub-cavities on both sides of the isolation valve.

[0011] In some embodiments, the gas explosion cavity structure further includes a plurality of guide protrusions disposed within the gas explosion cavity and arranged in a horizontal direction; the guide protrusions are connected to the lower end of the cavity body, and each guide protrusion has a first guide slope, with the first guide slope of one guide protrusion located within a sub-cavity; the first guide slope includes a first end and a second end arranged in a direction from the first sub-cavity to the second sub-cavity, the second end being closer to the upper surface of the cavity body than the first end, and for the same sub-cavity, the air inlet communicating with the sub-cavity is located on the side of the first end of the first guide slope corresponding to the sub-cavity that is away from the second end.

[0012] In some embodiments, the angle between the first guide ramp and the horizontal direction is greater than or equal to 25° and less than or equal to 35°.

[0013] In some embodiments, the isolation valve includes a valve plate, the upper end of which is connected to the upper end of the cavity body, and the lower end of which is swayable in the horizontal direction to open or close two sub-chambers on both sides of the isolation valve; a guide protrusion corresponds to an isolation valve, and when the valve plate closes the two sub-chambers on both sides of the isolation valve, the lower end of the valve plate contacts the corresponding guide protrusion.

[0014] In some embodiments, the guide protrusion further includes a second guide slope. For a guide protrusion, the first guide slope of the guide protrusion is located in the front sub-cavity, and the second guide slope is located in the rear sub-cavity. Two adjacent guide protrusions are a first guide protrusion and a second guide protrusion, respectively. One end of the second guide slope of the first guide protrusion is connected to the second end of the first guide slope of the first guide protrusion, and the other end of the second guide slope of the first guide protrusion is connected to the first end of the first guide slope of the second guide protrusion.

[0015] Secondly, this application also provides a de-powdering device, including the gas explosion chamber structure for electrode de-powdering provided in the first aspect, a feeding hopper and a spraying assembly, wherein the outlet of the feeding hopper is connected to the inlet of the gas explosion chamber structure; the spraying assembly is connected to multiple air inlets of the gas explosion chamber structure for introducing high-pressure pulsed airflow into multiple sub-chambers of the gas explosion chamber structure.

[0016] The de-powdering device provided in the second aspect includes the gas explosion chamber structure provided in the first aspect, and therefore has the same technical effect as the gas explosion chamber structure provided in the first aspect, which will not be described in detail here.

[0017] In some embodiments, the jetting assembly includes: a gas storage tank, a plurality of electromagnetic pulse valves, and a plurality of jetting pipes. The gas storage tank is used to store high-pressure gas. The plurality of electromagnetic pulse valves are all connected to the gas storage tank. The inlet of one jetting pipe is connected to one electromagnetic pulse valve, the outlet of one jetting pipe is connected to an air inlet, and the outlet of the jetting pipe faces the second sub-chamber and is inclined upward to discharge gas.

[0018] In some embodiments, the dust removal device further includes a dust removal component, a dust removal pipe, and a spring valve. One end of the dust removal pipe is connected to the second sub-chamber, and the other end of the dust removal pipe is connected to the dust removal component. The spring valve is connected to the dust removal pipe and opens when the airflow pressure in the second sub-chamber is greater than a preset pressure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the powder removal device provided in the embodiments of this application; Figure 2 for Figure 1 The diagram shows the structure of the feed valve in the powder removal device.

[0021] Figure label: 100. De-powdering device; 1. Feed hopper; 2. Feed valve; 20. Pulse blowing assembly; 30. Air explosion chamber structure; 301. Chamber body; 302. Air explosion chamber; 303. Isolation valve; 3. Pulse jet control device; 4. Air storage tank; 5. Electromagnetic pulse valve; 6. Injection pipeline; 8. Sub-chamber; 81. First sub-chamber; 82. Second sub-chamber; 83. Anterior sub-chamber; 84. Posterior sub-chamber; 9. Valve plate; 10. Elastic element; 11. Spring valve; 12. Dust collection assembly; 13. Discharge valve; 40. Dust collection pipeline; 50. Guide protrusion; 501. First guide slope; 5011. First end; 5012. Second end; 502. Second guide slope; 50A. First guide protrusion; 50B. Second guide protrusion. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0025] This application provides a de-powdering device 100. The de-powdering device 100 is used to remove electrode powder from the electrode sheets of waste lithium batteries in order to facilitate the recycling of the electrode powder.

[0026] In some embodiments, the de-powdering device 100 may include a feed hopper 1, a blowing assembly 20, and an air explosion chamber structure 30. The feed hopper 1 is used to buffer materials, wherein the materials may be electrode sheets from waste lithium batteries. The materials in the feed hopper 1 can be transported to the feed hopper 1 by a feeding conveyor belt, a forklift, or the like.

[0027] The gas explosion chamber structure 30 includes a chamber body 301, which has a gas explosion chamber 302 and an air inlet and a feed inlet communicating with the gas explosion chamber 302. The outlet of the feed hopper 1 is connected to the feed inlet of the gas explosion chamber structure 30, and the material in the feed hopper 1 can enter the gas explosion chamber 302 through the feed inlet. For some examples, please refer to [other examples]. Figure 1 and Figure 2 A feed valve 2 can be installed between the outlet and inlet of the feed hopper 1. By adjusting the opening of the feed valve 2, the feeding speed and amount of material from the feed hopper into the explosion chamber 302 can be controlled. Furthermore, when feeding stops, the feed valve 2 can be closed to prevent further material from entering the explosion chamber 302. For example, the feed valve 2 can be a star-shaped discharge valve, a slide gate valve, a ball valve, etc.

[0028] In some examples, the number of feed valves 2 can be one or more. When there are multiple feed valves 2, the feeding speed and feed rate of the material can be better controlled.

[0029] The jetting assembly 20 is connected to the air inlet of the gas explosion chamber structure 30, and is used to introduce high-pressure pulsed airflow into the gas explosion chamber 302 of the gas explosion chamber structure 30 through the air inlet. After the high-pressure pulsed airflow enters the gas explosion chamber 302, it can impact the material in the gas explosion chamber 302, causing the material to vibrate under the impact of the strong airflow generated by the pulsed gas explosion, thereby causing the electrode powder on the electrode sheet to detach from the electrode sheet. In this way, compared with the hammer crushing method for pulverizing and removing powder from the electrode sheet, the high-pressure pulsed airflow will not cause damage to the electrode sheet. That is, after the electrode powder is detached from the electrode sheet by impact vibration, the metal foil is basically undamaged. Therefore, the content of metal powder in the electrode powder after the separation of the electrode sheet and the electrode powder is low, thereby improving the purity of the recovered electrode powder.

[0030] In some embodiments, the jetting assembly 20 includes a gas storage tank 4, an electromagnetic pulse valve 5, and a jetting pipe 6. The gas storage tank 4 is used to store high-pressure gas. For example, the high-pressure gas can be air, nitrogen, etc. The gas pressure is greater than or equal to 0.7 MPa; for example, the gas pressure can be 0.7 MPa, 0.8 MPa, 0.9 MPa, 1 MPa, etc.

[0031] Electromagnetic pulse valve 5 is connected to air storage tank 4. Opening and closing electromagnetic pulse valve 5 generates pulsed gas explosions. The inlet of injection pipe 6 is connected to electromagnetic pulse valve 5, and the outlet of injection pipe 6 is connected to air inlet. The outlet of injection pipe 6 faces the same horizontal direction. The pulsed gas explosions generated by electromagnetic pulse valve 5 can enter the gas explosion chamber 302 through injection pipe 6 and be sprayed onto the surface of the electrode sheet within the gas explosion chamber 302. The material (i.e., the electrode sheet) moves forward under the impact of the airflow, and the strong pulsed airflow vibration can cause the electrode powder on the electrode sheet to detach. Thus, mechanical force can be eliminated during electrode powder removal, thereby reducing damage to the metal foil, reducing the metal powder content in the electrode powder, and improving the purity of the recovered electrode powder.

[0032] In some embodiments, the jetting assembly 20 may further include a pulse jetting control device 3, which is connected to the gas storage tank 4 and to the electromagnetic pulse valve 5, for controlling the opening and closing of the electromagnetic pulse valve 5 to generate a pulse gas explosion.

[0033] In some embodiments, a photoelectric sensor may also be installed inside the gas explosion chamber 302 to track the position of the electrode within the gas explosion chamber 302. This allows the electromagnetic pulse valve 5 to open and close via the pulse jet control device 3 to generate a pulse gas explosion when the electrode moves to the appropriate position. The pulse gas explosion precisely impacts the electrode, thereby better removing the electrode powder from the electrode and improving the powder removal effect.

[0034] In some embodiments, please continue reading Figure 1The gas explosion chamber structure 30 may include a chamber body 301 and multiple isolation valves 303. The chamber body 301 is provided with a gas explosion chamber 302, multiple air inlets and feed inlets. The multiple isolation valves 303 are arranged horizontally at intervals in the gas explosion chamber 302 and connected to the chamber body 301 to divide the gas explosion chamber 302 into multiple sub-chambers 8 arranged horizontally.

[0035] Multiple air inlets are located at the bottom of the cavity body 301, and each air inlet is connected to a corresponding sub-chamber 8 for introducing high-pressure pulsed airflow into the corresponding sub-chamber 8.

[0036] For example, there are multiple electromagnetic pulse valves 5 and multiple injection pipes 6, and all multiple electromagnetic pulse valves 5 are connected to the gas storage tank 4; the inlet of one injection pipe 6 is connected to one electromagnetic pulse valve 5, and the outlet of one injection pipe 6 is connected to one air inlet. The gas in the gas storage tank 4 can enter multiple sub-chambers 8 through multiple electromagnetic pulse valves 5 and multiple injection pipes 6, so that the material (i.e., electrode plates) in the multiple sub-chambers 8 is subjected to impact vibration under the action of pulse airflow, thereby causing the electrode powder on the material to detach.

[0037] Among the multiple sub-chambers 8, the two outermost sub-chambers 8 are the first sub-chamber 81 and the second sub-chamber 82, respectively. The feed inlet is located at the top of the cavity body 301 and communicates with the first sub-chamber 81, for feeding the electrode sheet into the first sub-chamber 81. That is, the feed inlet is located at the top of the first sub-chamber 81.

[0038] In any two adjacent sub-chambers 8, the sub-chamber 8 closer to the feed inlet is the front sub-chamber 83, and the sub-chamber 8 farther from the feed inlet is the rear sub-chamber 84. When the airflow pressure in the front sub-chamber 83 reaches the preset pressure, the isolation valve 303 located between the front sub-chamber 83 and the rear sub-chamber 84 opens, so that the material in the front sub-chamber 83 enters the rear sub-chamber 84.

[0039] According to the above configuration, the feed inlet is located at the top of the cavity body 301 and communicates with the first sub-chamber 81. Material can enter the first sub-chamber 81 under gravity through the feed inlet, thus facilitating material entry into the first sub-chamber 81. After the material enters the first sub-chamber 81, a high-pressure pulsed airflow is introduced into the first sub-chamber 81 through the air inlet communicating with the first sub-chamber 81. This causes the material in the first sub-chamber 81 to be impacted and vibrated under the action of the high-pressure pulsed airflow, thereby causing the electrode powder on the material to detach.

[0040] When the airflow pressure in the front sub-chamber 83 reaches a preset pressure, the isolation valve 303 between the front sub-chamber 83 and the rear sub-chamber 84 opens, allowing the material in the front sub-chamber 83 to enter the rear sub-chamber 84. After the material in the first sub-chamber 81 is de-powdered and the pressure reaches the preset pressure, the isolation valve 303 between the first sub-chamber 81 and the sub-chamber 8 adjacent to the first sub-chamber 81 will open. At this time, the material in the first sub-chamber 81 will enter the sub-chamber 8 adjacent to the first sub-chamber 81 under the action of airflow. At this time, a high-pressure pulse airflow is introduced into the sub-chamber 8 adjacent to the first sub-chamber 81 through the air inlet connected to the sub-chamber 8 adjacent to the first sub-chamber 81 to de-powder the material entering the sub-chamber 8 adjacent to the first sub-chamber 81, and then the material is de-powdered in the next sub-chamber 8. In other words, along the direction from the first sub-chamber 81 to the second sub-chamber 82, multiple isolation valves 303 will open in sequence, allowing the material to enter each sub-chamber 8 in sequence for de-powdering. This allows the material to undergo multiple air-explosion de-powdering processes, making the powder on the material more thoroughly removed and improving the de-powdering effect.

[0041] By placing the air inlet at the bottom of the cavity body 301, the airflow can be better sprayed onto the material, thereby better removing powder from the material and improving the powder removal effect.

[0042] In some examples, the outlet 7 of the injection pipe 6 faces the second sub-chamber 82 and is inclined upwards to discharge air. In this way, the air discharge direction of the outlet 7 of the injection pipe 6 is inclined upwards, which can ensure that the airflow can be sprayed onto the material well, and can blow the material in the front sub-chamber 83 toward the rear sub-chamber 84, so that when the isolation valve 303 between the front sub-chamber 83 and the rear sub-chamber 84 is opened, the material in the front sub-chamber 83 can be blown into the rear sub-chamber 84.

[0043] In some other examples, the outlet 7 of the jet pipe 6 can also be vertically upward, so that the airflow can be sprayed onto the material and the material in the front sub-chamber 83 can be blown into the rear sub-chamber 84.

[0044] In some embodiments, there can be multiple photoelectric sensors, with one photoelectric sensor installed in each sub-chamber 8. The photoelectric sensor identifies the position of the material, so as to control the flow of high-pressure pulsed airflow into the corresponding sub-chamber 8 according to the position of the material, so as to accurately remove powder from the material in the sub-chamber 8.

[0045] In some embodiments, please continue reading Figure 1The cavity body 301 is also provided with a dust removal port, which communicates with the second sub-chamber 82. For example, the dust removal port can be located at the upper end of the cavity body 301 and on one side of the cavity body 301 in the horizontal direction. Alternatively, the dust removal port can be located at the top of the cavity body 301. Since the electrode powder is lighter than the metal foil, after the material passes through multiple sub-chambers 8 for de-powdering and enters the second sub-chamber 82, under the impact of the airflow in the second sub-chamber 82, the electrode powder is more likely to float in the air-explosion chamber 302, while the metal foil will descend rapidly. This allows some of the electrode powder to be separated and collected through the dust removal port. Based on this, setting the dust removal port at the upper end of the cavity body 301 can significantly reduce the amount of metal foil entering the dust removal port and improve the purity of the electrode powder separated from the dust removal port.

[0046] The dust removal device 100 may further include a dust collection assembly 12, a dust collection duct 40, and a spring valve 11. One end of the dust collection duct 40 is connected to the second sub-chamber 82, i.e., to the dust collection port, so as to connect to the second sub-chamber 82 through the dust collection port. The other end of the dust collection duct 40 is connected to the dust collection assembly 12. In this way, the electrode powder separated through the dust collection port can enter the dust collection assembly 12 and be collected in the dust collection assembly 12, thereby preventing electrode powder leakage and dust pollution, and improving environmental protection performance. In some examples, the dust collection assembly 12 can be a bag filter, a cartridge filter, etc.

[0047] Spring valve 11 is connected to dust removal pipe 40. Spring valve 11 opens when the airflow pressure in the second sub-chamber 82 is greater than the preset pressure. By setting spring valve 11, when the airflow pressure in the second sub-chamber 82 is less than the preset pressure, spring valve 11 closes, preventing airflow from leaking from the dust removal port in the second sub-chamber 82. This ensures the airflow pressure in the second sub-chamber 82, thereby ensuring that the electrode plates in the second sub-chamber 82 can be sufficiently impacted and vibrated to allow the electrode powder to detach completely, improving the powder removal effect.

[0048] When the pressure in the second sub-chamber 82 exceeds the preset pressure, the spring valve 11 opens, allowing airflow from the second sub-chamber 82 to enter the dust removal assembly 12 and then exit, thereby depressurizing the second sub-chamber 82 and facilitating its re-entry into the pulse gas explosion for electrode powder removal. During the opening of the spring valve 11, electrode powder in the second sub-chamber 82 can enter the dust removal assembly 12 under the action of the airflow. When the pressure in the second sub-chamber 82 is depressurized to below the preset pressure, the valve core of the spring valve 11 closes again under the action of the spring.

[0049] The preset pressure is the force required for the valve core of the spring valve 11 to push the spring to compress so that the valve core opens the spring valve 11. This preset pressure needs to be greater than the pressure required for the electrode plate in the second sub-chamber 82 to be gas-exploded.

[0050] In some embodiments, please continue reading Figure 1 The cavity body 301 is also provided with a discharge port, which communicates with the second sub-chamber 82, so that the material that has been sequentially gas-exploded through multiple sub-chambers 8 can be discharged through the discharge port after entering the second sub-chamber 82. For example, the discharge port can be located at the bottom of the cavity body 301. As another example, the discharge port can also be located on one side of the cavity body 301 in the horizontal direction.

[0051] In some examples, a discharge valve 13 can be installed on the discharge port. During material de-powdering, the discharge valve 13 is closed; after de-powdering, the discharge valve 13 is opened to discharge the material. For example, the discharge valve 13 can be a star-shaped discharge valve, a slide gate valve, a ball valve, etc. In some examples, the number of discharge valves 13 can be one or more. When there is only one cavity body 301, a discharge port and a discharge valve 13 can be installed at the lower end of the cavity body 301.

[0052] In some embodiments, please continue reading Figure 1 The isolation valve 303 includes a valve plate 9, the upper end of which is connected to the upper end of the cavity body 301, and the lower end of which can swing horizontally to open or close the two sub-cavities 8 on both sides of the isolation valve 303.

[0053] The upper end of valve plate 9 is connected to the upper end of cavity body 301. The lower end of valve plate 9 can swing horizontally. When the pressure in the front sub-chamber 83 is high, airflow can push the lower end of valve plate 9 to swing, thereby opening isolation valve 303 and allowing material in the front sub-chamber 83 to enter the second sub-chamber 82. This allows for automatic opening of isolation valve 303 via airflow, facilitating control and reducing costs. Furthermore, the structure of valve plate 9 is relatively simple and easy to implement, further reducing costs.

[0054] In addition, the lower end of the valve plate 9 can swing horizontally. When the material in the front sub-chamber 83 enters the rear sub-chamber 84, it first enters the lower end of the rear sub-chamber 84. The air inlet of the rear sub-chamber 84 is also located at the bottom. This allows the material entering the rear sub-chamber 84 to be better blown by the airflow, thereby better removing powder from the material.

[0055] In some embodiments, the isolation valve 303 further includes an elastic element 10, one end of which is connected to the valve plate 9 and the other end of which is connected to the cavity body 301. The elastic element 10 is used to apply a force to the valve plate 9 to block the two sub-cavities 8 on both sides of the isolation valve 303.

[0056] For example, the elastic element 10 can be a columnar spring. In this case, the elastic element 10 can be located on one side of the first guide plate in the horizontal direction, and one end of the elastic element 10 is connected to the inner wall surface of the cavity body 301, while the other end of the elastic element 10 is connected to the first guide plate, so as to support the first guide plate through the elastic element 10. As another example, the elastic element 10 can also be a torsion spring, an elastic rubber column, an elastic silicone column, etc.

[0057] By incorporating the elastic element 10, a force can be applied to the valve plate 9 to close the isolation valve 303. When the pressure in the front sub-chamber 83 is high, for example, greater than the force required for the elastic element 10 to deform, the airflow can push the lower end of the valve plate 9 to swing, thereby opening the valve and allowing material in the front sub-chamber 83 to enter the rear sub-chamber 84. When the pressure in the front sub-chamber 83 decreases to less than the force required for the elastic element 10 to deform, the valve plate 9 can reset under the elastic force of the elastic element 10, thereby closing the isolation valve 303. This allows the isolation valve 303 to adaptively open and close according to changes in airflow pressure, facilitating the sequential transport of material within multiple sub-chambers 8.

[0058] In some examples, the upper end of the valve plate 9 is rotatably connected to the cavity body 301, and the direction of the rotation axis of the valve plate 9 is perpendicular to the first horizontal direction and perpendicular to the vertical direction.

[0059] In other examples, the upper end of the valve plate 9 is fixedly connected to the cavity body 301, and the upper end of the valve plate 9 is elastic so that the lower end of the valve plate 9 can swing through the elasticity of the upper end of the valve plate 9.

[0060] In some other embodiments, the valve plate 9 can be an elastic plate, and the elastic force of the elastic plate is in the direction that causes the elastic plate to close the isolation valve 303. In this way, the isolation valve 303 can be opened or closed adaptively according to the size of the airflow.

[0061] In some embodiments, please continue reading Figure 1 The gas explosion cavity structure 30 may also include multiple guide protrusions 50, which are disposed within the gas explosion cavity 302 and arranged horizontally. For example, the guide protrusions 50 may be triangular protrusions, trapezoidal protrusions, etc.

[0062] A guide protrusion 50 is connected to the lower end of the cavity body 301. The guide protrusion 50 has a first guide slope 501, and the first guide slope 501 of the guide protrusion 50 is located in a sub-cavity 8. The first guide slope 501 includes a first end 5011 and a second end 5012 arranged in a direction from the first sub-cavity 81 to the second sub-cavity 82. The second end 5012 is closer to the upper surface of the cavity body 301 than the first end 5011. For the same sub-cavity 8, the air inlet communicating with the sub-cavity 8 is located on the side of the first end 5011 of the first guide slope 501 corresponding to the sub-cavity 8 that is away from the second end 5012.

[0063] With the above configuration, the first guide slope 501 of the guide protrusion 50 is inclined upward along the direction from the first sub-chamber 81 toward the second sub-chamber 82. In this way, the material in the sub-chamber 8 will be blown upward along the first guide slope 501 under the action of airflow and the action of the first guide slope 501, and then fall downward under its own gravity. This allows the material to be fully impacted and vibrated by the airflow during the rising and falling process, thereby allowing the powder on the material to be fully detached and improving the powder removal effect of the material.

[0064] In some embodiments, the angle between the first guide ramp 501 and the horizontal direction (e.g.) Figure 1 The angle α shown is greater than or equal to 25° and less than or equal to 35°. For example, the angle between the first guide slope 501 and the horizontal direction can be 25°, 28°, 30°, 32°, 35°, etc.

[0065] By setting the angle between the first guide slope 501 and the horizontal direction within the above range, the material can be better guided on the first guide slope 501, and the first guide slope 501 can avoid causing a large obstruction to the material, so that the material in the front sub-chamber 83 can smoothly enter the rear sub-chamber 84.

[0066] In some embodiments, please continue reading Figure 1 The isolation valve 303 includes a valve plate 9, the upper end of which is connected to the upper end of the cavity body 301. The lower end of the valve plate 9 can swing horizontally to open or close the two sub-chambers 8 on both sides of the isolation valve 303. A guide protrusion 50 corresponds to one isolation valve 303. When the valve plate 9 closes the two sub-chambers 8 on both sides of the isolation valve 303, the lower end of the valve plate 9 contacts the corresponding guide protrusion 50.

[0067] In this way, when the isolation valve is closed, the guide protrusion 50 contacts the lower end of the valve plate 9, allowing the guide protrusion 50 and the valve plate 9 to more thoroughly block the two adjacent sub-chambers 8, thus improving the blocking effect. Furthermore, the guide protrusion 50 can limit the movement of the valve plate 9, ensuring that the valve plate 9 is accurately positioned in the closed position.

[0068] In some embodiments, please continue reading Figure 1 The guide protrusion 50 also includes a second guide ramp 502. For a guide protrusion 50, the first guide ramp 501 of the guide protrusion 50 is located in the front sub-chamber 83, and the second guide ramp 502 is located in the rear sub-chamber 84. Two adjacent guide protrusions 50 are a first guide protrusion 50A and a second guide protrusion 50B, respectively. One end of the second guide ramp 502 of the first guide protrusion 50A is connected to the second end 5012 of the first guide ramp 501 of the first guide protrusion 50A, and the other end of the second guide ramp 502 of the first guide protrusion 50A is connected to the first end 5011 of the first guide ramp 501 of the second guide protrusion 50B.

[0069] In other words, the second guide slope 502 gradually slopes downwards along the direction from the first sub-chamber 81 to the second sub-chamber 82. One end of the second guide slope 502 of the first guide protrusion 50A is connected to the second end 5012 of the first guide slope 501 of the first guide protrusion 50A, and the other end of the second guide slope 502 of the first guide protrusion 50A is connected to the first end 5011 of the first guide slope 501 of the second guide protrusion 50B. After the first guide slope 501 of the first guide protrusion 50A guides the material in the front sub-chamber 83, causing the material to be blown upwards, the second guide slope 502 can guide the material to the first guide slope 501 of the second guide protrusion 50B in the rear sub-chamber 84 during its downward fall. This facilitates the guidance of the material in the rear sub-chamber 84 by the first guide slope 501 of the second guide protrusion 50B.

[0070] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gas explosion cavity structure for electrode powder removal, characterized in that, include: The cavity body has an air explosion chamber, multiple air inlets, a feed inlet, a dust removal inlet, and a discharge outlet. Multiple isolation valves are arranged horizontally at intervals within the gas explosion chamber and connected to the chamber body to divide the gas explosion chamber into multiple sub-chambers arranged horizontally. Multiple air inlets are located at the bottom of the cavity body, and each air inlet is connected to a corresponding sub-chamber for introducing high-pressure pulsed airflow into the corresponding sub-chamber. The two outermost sub-chambers among the plurality of sub-chambers are the first sub-chamber and the second sub-chamber, respectively. The feed inlet is located at the top of the cavity body and communicates with the first sub-chamber, for conveying the electrode sheet to the first sub-chamber. The dust removal port is located at the top of the cavity body, and the discharge port is located at the bottom of the cavity body. Both the dust removal port and the discharge port communicate with the second sub-chamber. In any two adjacent sub-chambers, the sub-chamber closer to the feed inlet is the front sub-chamber, and the sub-chamber farther from the feed inlet is the rear sub-chamber. When the airflow pressure in the front sub-chamber reaches a preset pressure, the isolation valve located between the front sub-chamber and the rear sub-chamber opens, so that the material in the front sub-chamber enters the rear sub-chamber.

2. The gas explosion cavity structure according to claim 1, characterized in that, The isolation valve includes a valve plate, the upper end of which is connected to the upper end of the cavity body, and the lower end of which can swing in the horizontal direction to open or close the two sub-cavities on both sides of the isolation valve.

3. The gas explosion cavity structure according to claim 2, characterized in that, The isolation valve also includes an elastic element, one end of which is connected to the valve plate and the other end of which is connected to the cavity body. The elastic element is used to apply a force to the valve plate to block the two sub-cavities on both sides of the isolation valve.

4. The gas explosion cavity structure according to any one of claims 1-3, characterized in that, It also includes multiple guide protrusions, which are disposed within the gas explosion chamber and arranged along the horizontal direction; The guide protrusion is connected to the lower end of the cavity body, and the guide protrusion has a first guide slope. The first guide slope of one guide protrusion is located in one of the sub-cavities. The first guide slope includes a first end and a second end arranged in the direction from the first sub-chamber to the second sub-chamber. The second end is closer to the upper surface of the cavity body than the first end. For the same sub-chamber, the air inlet communicating with the sub-chamber is located on the side of the first end of the first guide slope corresponding to the sub-chamber that is away from the second end.

5. The gas explosion cavity structure according to claim 4, characterized in that, The angle between the first guide slope and the horizontal direction is greater than or equal to 25° and less than or equal to 35°.

6. The gas explosion cavity structure according to claim 4, characterized in that, The isolation valve includes a valve plate, the upper end of which is connected to the upper end of the cavity body, and the lower end of which can swing in the horizontal direction to open or close the two sub-cavities on both sides of the isolation valve. One of the guide protrusions corresponds to one of the isolation valves, and when the valve plate blocks the two sub-chambers on both sides of the isolation valve, the lower end of the valve plate contacts the corresponding guide protrusion.

7. The gas explosion cavity structure according to claim 4, characterized in that, The guide protrusion further includes a second guide slope. For a guide protrusion, the first guide slope of the guide protrusion is located in the front sub-cavity, and the second guide slope is located in the rear sub-cavity. The two adjacent guide protrusions are the first guide protrusion and the second guide protrusion, respectively. One end of the second guide slope of the first guide protrusion is connected to the second end of the first guide slope of the first guide protrusion, and the other end of the second guide slope of the first guide protrusion is connected to the first end of the first guide slope of the second guide protrusion.

8. A powder removal device, characterized in that, include: The gas explosion cavity structure according to any one of claims 1-7; A feeding hopper, the outlet of which is connected to the inlet of the gas explosion chamber structure; A jetting assembly is connected to multiple air inlets of the gas explosion cavity structure and is used to introduce high-pressure pulsed airflow into multiple sub-cavities of the gas explosion cavity structure.

9. The powder removal device according to claim 8, characterized in that, The blowing assembly includes: Gas storage tanks are used to store high-pressure gases; Multiple electromagnetic pulse valves, all of which are connected to the gas storage tank; Multiple injection pipes, the inlet of one injection pipe is connected to one of the solenoid pulse valves, the outlet of one injection pipe is connected to one of the air inlets, and the outlet of the injection pipe faces the second sub-chamber and is inclined upward to release air.

10. The powder removal device according to claim 8, characterized in that, Also includes: Dust removal components; A dust removal duct, one end of which is connected to the second sub-chamber of the gas explosion cavity structure, and the other end of which is connected to the dust removal assembly; A spring valve is connected to the dust removal pipe, and the spring valve opens when the airflow pressure in the second sub-chamber is greater than a preset pressure.

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