Grinding device for new energy battery processing

Abstract

The invention provides a grinding device for new energy battery processing, and relates to the technical field of grinding, the grinding device comprises a grinding cylinder, the upper end face of the grinding cylinder is connected with a feeding pipe, the upper end face of the feeding pipe is connected with a feeding cylinder, and the lower end face of the grinding cylinder is provided with a motor; the hydraulic grinding mechanism comprises a grinding disc, the lower end face of the grinding disc is connected with the output end of the motor, the grinding disc is located in the grinding cylinder and rotationally connected with the inner side wall of the grinding cylinder, pressing strips are arranged on the surface of the grinding disc, and a conical disc is arranged in the center of the upper end face of the grinding disc; according to the grinding device for new energy battery processing, through the collaborative design of the hydraulic grinding mechanism and a reciprocating heat dissipation system, the grinding efficiency and the product quality are improved, stable operation of equipment is ensured, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and more specifically, to a grinding apparatus for processing new energy batteries. Background Technology

[0002] As the core power source for electric vehicles, energy storage systems, and various portable electronic devices, the precision and quality of the manufacturing process of new energy batteries directly affect their performance, lifespan, and safety. The manufacturing process of new energy batteries requires a large amount of active materials, such as positive electrode materials like lithium iron phosphate, lithium cobalt oxide, and lithium nickel cobalt manganese oxide, as well as negative electrode materials like graphite and silicon-based materials. These battery materials often exist in block, granular, or agglomerated states in the early stages of production. They need to be processed into fine powder materials with specific particle size distributions using specialized grinding equipment to meet the technical requirements of battery slurry preparation. The core function of the grinding equipment is to gradually break down and refine the blocky battery raw materials through mechanical force, ultimately obtaining micro-fine powders with uniform particle size and good dispersion. The particle size, shape distribution, and surface characteristics of these powder materials directly affect the rheological properties of the battery slurry, the uniformity of coating, and the electrochemical performance of the electrodes.

[0003] Existing grinding devices face the problem of poor heat dissipation during the grinding process. This deficiency negatively impacts the grinding effect in several ways. When lumpy materials are subjected to strong impacts, compression, and shearing by the grinding media within the grinding chamber, a large amount of mechanical energy is converted into heat energy. Especially under high-speed grinding and long-term continuous operation, the temperature inside the grinding chamber rises rapidly and heat accumulates in localized areas. Excessively high grinding temperatures can cause thermal softening of the lumpy materials during the crushing process, making the originally brittle materials more ductile and increasing the difficulty of further crushing, thus reducing grinding efficiency. Furthermore, it can also cause adhesion to the walls and agglomeration during the crushing process, affecting the flowability and dispersion of the powder. More seriously, high-temperature environments can trigger chemical reactions such as thermal decomposition, oxidation, or phase transition of battery active materials, leading to a decline in the electrochemical performance of the powder after grinding, such as reduced specific capacity, poor cycle stability, and increased impedance. This directly affects the performance of the final battery product. Traditional grinding equipment often relies solely on the natural heat dissipation of the equipment casing or simple ventilation devices for passive heat dissipation. This method of heat dissipation usually cannot remove the heat generated during the grinding process in time, causing the temperature inside the grinding chamber to rise continuously. This not only affects the efficiency and quality of converting lumpy materials into powder, but may also cause thermal deformation of the grinding equipment itself, overheating of bearings, and increased motor load, increasing the risk of equipment failure and maintenance costs. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, the present invention provides a grinding device for processing new energy batteries to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A grinding device for processing new energy batteries includes a grinding cylinder, with a feed pipe connected to the upper end face of the grinding cylinder and a feed tube connected to the upper end face of the feed pipe. A motor is provided on the lower end face of the grinding cylinder. The device also includes a hydraulic grinding mechanism, comprising a grinding disc, the lower end face of which is connected to the output end of the motor. The grinding disc is located inside the grinding cylinder and rotatably connected to the inner wall of the grinding cylinder. A pressure strip is provided on the surface of the grinding disc, and a conical disc is provided at the center of the upper end face of the grinding disc. A conveying strip is provided on the surface of the conical disc. The device further includes a heat dissipation mechanism, comprising a pressure plate located inside the grinding cylinder and rotatably connected to it. A slot adapted to the pressure strip is formed on the lower end face of the pressure plate, and the lower end face of the pressure plate cooperates with the upper end face of the grinding disc. An auxiliary cylinder is provided on the upper end face of the pressure plate, and the conical disc cooperates with the auxiliary cylinder.

[0006] Preferably, the inner wall of the grinding cylinder is provided with a discharge port, and the outer wall of the grinding cylinder is connected to a discharge pipe, the discharge pipe being positioned corresponding to the discharge port.

[0007] Preferably, the upper end face of the grinding cylinder is provided with four sets of hydraulic pipes, the upper part of the hydraulic pipes is provided with a partition, the lower end face of the partition is provided with a push spring, the lower end face of the push spring is connected to a sliding plate, and the sliding plate is slidably connected to the inner side wall of the hydraulic pipe.

[0008] Preferably, a sliding sleeve is slidably connected to the inner wall of the hydraulic pipe, an intermediate pipe is connected to the lower end face of the sliding sleeve, and a sealing disc is connected to the lower end face of the intermediate pipe.

[0009] Preferably, the hydraulic pipe is provided with a sealing plate, which is in sealing contact with the sealing disc, and the lower end face of the sliding sleeve is provided with a compression spring, the other end of which is fixedly connected to the upper end face of the sealing plate.

[0010] Preferably, the intermediate tube is threaded with a threaded sleeve, and a plug rod is provided between the threaded sleeves. An adjusting spring is provided at the top of the intermediate tube, and the other end of the adjusting spring is fixedly connected to the side wall of the threaded sleeve. A flow control tube is provided inside the intermediate tube, and the flow control tube is used in conjunction with the plug rod.

[0011] Preferably, the upper surface of the pressure plate is provided with four sets of connecting rods, which are slidably connected to the inside of the grinding cylinder. The upper surfaces of the left and right sets of connecting rods are connected to a first connecting plate, and the upper surfaces of the front and rear sets of connecting rods are connected to a second connecting plate. Both the first and second connecting plates are slidably connected to hydraulic pipes.

[0012] Preferably, the first and second connecting plates are provided with cross grooves, the pressure plate is provided with a circulation groove, and the four sets of connecting rods are provided with connecting grooves. The cross grooves in the two sets of the first connecting plates and the two sets of the second connecting plates are connected to the circulation grooves through the connecting grooves in the four sets of connecting rods.

[0013] Preferably, two sets of heat dissipation pipes are connected to the outer sides of the two sets of hydraulic pipes that are slidably connected to the first connecting plate, and the surface of the heat dissipation pipes is provided with multiple sets of heat dissipation fins. Preferably, a buffer plate is slidably connected inside the heat dissipation pipe, and a buffer spring is provided on the side wall of the buffer plate, with the other end of the buffer spring being fixedly connected to the side wall of the heat dissipation pipe.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a grinding device for processing new energy batteries, which has the following beneficial effects: This grinding device for processing new energy batteries, through the coordinated design of a hydraulic grinding mechanism and a reciprocating heat dissipation system, not only improves grinding efficiency and product quality, but also ensures stable operation of the equipment and extends its service life. The hydraulic grinding mechanism achieves preliminary grinding of materials through the cooperation of a conical disc and an auxiliary cylinder. Subsequently, the materials are transported between the grinding disc and the pressure disc for further grinding. When encountering large pieces of material, the pressure disc moves upward under pressure, driving the connecting rod to move upward synchronously, thereby pushing the first connecting disc and the second connecting disc upward. During this process, hydraulic oil flows between the hydraulic pipe, the heat dissipation pipe, the cross groove, the connecting groove, and the circulation groove, ensuring pressure balance and uniform grinding of materials during the grinding process. When the large pieces of material are ground into small pieces, the pressure disappears, and the hydraulic system returns to its original position, ensuring the continuity and stability of the grinding process.

[0015] The heat generated during the grinding process is effectively managed by the heat dissipation mechanism. When the first and second connecting discs move downwards, the hydraulic oil is pressurized and flows into the heat dissipation pipe, where it is cooled by the heat dissipation fins. The buffer disc moves backwards under pressure, and the buffer spring is compressed, ensuring the smooth flow of hydraulic oil. Since only the hydraulic pipe on one side of the first connecting disc is connected to the heat dissipation pipe, the hydraulic oil below the second connecting disc is pressurized and flows into the connecting groove through the cross groove. Finally, it is transported to the area below the first connecting disc through the circulation groove and then flows into the heat dissipation pipe for cooling. When the first and second connecting discs move upwards, the hydraulic oil in the heat dissipation pipe is pressurized and flows out of the heat dissipation pipe, flows into the connecting groove through the cross groove in the first connecting disc, and then flows into the circulation groove. Finally, it flows back to the area below the second connecting disc. This reciprocating cooling process ensures the temperature stability of the grinding device during long-term operation and extends the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a grinding device for processing new energy batteries according to the present invention; Figure 2 This is a cross-sectional view of the grinding cylinder and feed pipe in this invention; Figure 3 This is a schematic diagram of the structure of the grinding disc and the conical disc in this invention; Figure 4 This is a schematic diagram of the pressure plate and connecting rod in this invention; Figure 5 This is a cross-sectional view of the pressure plate and the connecting rod in this invention; Figure 6 This is a cross-sectional view of the hydraulic pipe and sliding sleeve in this invention; Figure 7 This is a cross-sectional view of the sliding sleeve and intermediate tube in this invention. Figure 8 This is a cross-sectional view of the heat dissipation pipe and buffer disk in this invention. Figure 9 This is a schematic diagram of the structure of the grinding cylinder and the discharge pipe in this invention.

[0017] In the diagram: 11. Grinding cylinder; 12. Feed pipe; 13. Feed cylinder; 14. Motor; 15. Discharge port; 16. Discharge pipe; 21. Grinding disc; 22. Pressure bar; 23. Conical disc; 24. Conveyor bar; 25. Hydraulic pipe; 26. Partition plate; 27. Push spring; 28. Slide plate; 29. ​​Sliding sleeve; 31. Pressure plate; 32. Slotted; 33. Auxiliary cylinder; 34. Connecting rod; 35. First connecting disc; 36. Second connecting disc; 37. Cross groove; 38. Circulation groove; 39. Connecting groove; 210. Intermediate pipe; 211. Sealing disc; 212. Sealing plate; 213. Compression spring; 214. Threaded sleeve; 215. Insert rod; 216. Adjusting spring; 217. Flow control pipe; 310. Heat dissipation pipe; 311. Heat dissipation fin; 312. Buffer disc; 313. Buffer spring. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0021] Please see Figures 1-9 A grinding device for processing new energy batteries includes a grinding cylinder 11, a feed pipe 12 connected to the upper end face of the grinding cylinder 11, a feed cylinder 13 connected to the upper end face of the feed pipe 12, a motor 14 mounted on the lower end face of the grinding cylinder 11, a discharge port 15 opened on the inner side wall of the grinding cylinder 11, and a discharge pipe 16 connected to the outer side wall of the grinding cylinder 11, with the discharge pipe 16 corresponding to the position of the discharge port 15; it also includes a hydraulic grinding mechanism, which includes a grinding disc 21, the lower end face of the grinding disc 21 connected to the output end of the motor 14, the grinding disc 21 located inside the grinding cylinder 11 and rotatably connected to the inner side wall of the grinding cylinder 11, a pressure strip 22 on the surface of the grinding disc 21, a conical disc 23 at the center of the upper end face of the grinding disc 21, a conveying strip 24 on the surface of the conical disc 23, four sets of hydraulic pipes 25 on the upper end face of the grinding cylinder 11, and a partition 26 in the upper part of the hydraulic pipes 25. A push spring 27 is provided on the lower end face of the 26. A slide plate 28 is connected to the lower end face of the push spring 27. The slide plate 28 is slidably connected to the inner wall of the hydraulic pipe 25. A sliding sleeve 29 is slidably connected to the inner wall of the hydraulic pipe 25. An intermediate pipe 210 is connected to the lower end face of the sliding sleeve 29. A sealing plate 211 is connected to the lower end face of the intermediate pipe 210. A sealing plate 212 is provided inside the hydraulic pipe 25. The sealing plate 212 and the sealing plate 211 are sealed and abutted. A compression spring 213 is provided on the lower end face of the sliding sleeve 29. The other end of the compression spring 213 is fixedly connected to the upper end face of the sealing plate 212. A threaded sleeve 214 is threadedly connected inside the intermediate pipe 210. An insert rod 215 is provided between the threaded sleeves 214. An adjusting spring 216 is provided at the top inside the intermediate pipe 210. The other end of the adjusting spring 216 is fixedly connected to the side wall of the threaded sleeve 214. A flow control pipe 217 is provided inside the intermediate pipe 210. The flow control pipe 217 is used in conjunction with the insert rod 215. It also includes a heat dissipation mechanism, which includes a pressure plate 31. The pressure plate 31 is located inside the grinding cylinder 11 and is rotatably connected to the grinding cylinder 11. The lower end face of the pressure plate 31 has a slot 32 adapted to the pressure strip 22. The lower end face of the pressure plate 31 is used in conjunction with the upper end face of the grinding disc 21. The upper end face of the pressure plate 31 is provided with an auxiliary cylinder 33. The conical disc 23 is used in conjunction with the auxiliary cylinder 33. The upper end face of the pressure plate 31 is provided with four sets of connecting rods 34. The connecting rods 34 are slidably connected to the inside of the grinding cylinder 11. The upper end faces of the left and right sets of connecting rods 34 are connected to the first connecting disc 35. The upper end faces of the front and rear sets of connecting rods 34 are connected to the second connecting disc 36. Both the first connecting disc 35 and the second connecting disc 36 are slidably connected to the hydraulic pipe 25. The connection includes a cross groove 37 in both the first connecting plate 35 and the second connecting plate 36, a circulation groove 38 in the pressure plate 31, and a connecting groove 39 in the four sets of connecting rods 34. The cross grooves 37 in the two sets of first connecting plates 35 and the two sets of second connecting plates 36 are connected to the circulation groove 38 through the connecting grooves 39 in the four sets of connecting rods 34. Two sets of heat dissipation pipes 310 are connected to the outside of the two sets of hydraulic pipes 25 that are slidably connected to the first connecting plate 35. Multiple heat dissipation fins 311 are provided on the surface of the heat dissipation pipes 310. A buffer plate 312 is slidably connected inside the heat dissipation pipes 310. A buffer spring 313 is provided on the side wall of the buffer plate 312. The other end of the buffer spring 313 is fixedly connected to the side wall of the heat dissipation pipe 310.

[0022] Before installation, insert rods 215 of appropriate length can be installed according to the characteristics of the material to be ground. The length of insert rod 215 can adjust the flow resistance in the flow control tube 217. Longer insert rods 215 result in greater resistance, while shorter insert rods 215 result in less resistance. First, the motor 14 starts, driving the grinding disc 21 to rotate, conveying the material to be ground into the feed cylinder 13. Then, it falls into the grinding cylinder 11 through the feed pipe 12. The material to be ground first passes between the conical disc 23 and the auxiliary cylinder 33 for preliminary grinding. The conveying strips 24 on the surface of the conical disc 23 are designed to further convey the material between the grinding disc 21 and the pressure plate 31. Further grinding is carried out with the cooperation of the pressure strips 22 and the slotted section 32. When encountering large pieces of material, the pressure plate 31 is pressed upward. The upward movement of the pressure plate 31 drives the four sets of connecting rods 34 to move upward synchronously, thereby driving the first connecting disc 35 and the second connecting disc on the upper end of the connecting rods 34. Simultaneously, hydraulic pipe 25, heat dissipation pipe 310, cross groove 37, connecting groove 39 and circulation groove 38 are all filled with hydraulic oil. The first connecting plate 35 moves upward and pushes the hydraulic oil above the first connecting plate 35 through the threaded sleeve 214 and the flow control pipe 217 into the upper part of the sealing plate 212. The sliding plate 28 is pressed and moves upward, and the push spring 27 is compressed. When the large pieces of material are ground up, the pressure disappears, and the push spring 27 rebounds and pushes the sliding plate 28 downward. The one-way sealing plate 211 is released from the pressure and the sealing contact with the sealing plate 212 is released. The hydraulic oil flows from the upper part of the sealing plate 212 into the lower part of the sealing plate 212 again. The compression spring 213 is compressed. After the hydraulic oil returns, the compression spring 213 rebounds and drives the sealing plate 211 to seal against the sealing plate 212 again. The first connecting plate 35 moves downward. The principle is the same on one side of the second connecting plate 36. After grinding, the material powder enters the discharge pipe 16 through the inclined discharge port 15 for centralized collection. During grinding, the device dissipates heat through a cooling mechanism. When the two sets of first connecting discs 35 and two sets of second connecting discs 36 move downwards, the hydraulic oil below the first connecting discs 35 is pressurized and flows into the cooling pipe 310, where it is cooled by the heat sink 311. The buffer disc 312 moves backwards under pressure, and the buffer spring 313 is compressed. Because only the hydraulic pipe 25 on one side of the first connecting disc 35 is connected to the cooling pipe 310, the hydraulic oil below the second connecting discs 36 is pressurized and flows into the connecting groove 39 through the cross groove 37, and finally is transported through the circulation groove 38. The hydraulic oil flows down to the bottom of the first connecting plate 35 and then into the heat dissipation pipe 310 for heat dissipation. Therefore, the hydraulic oil under the first connecting plate and the second connecting plate is delivered to the heat dissipation pipe 310 on one side of the first connecting plate. When the first connecting plate and the second connecting plate move upward, the hydraulic oil in the heat dissipation pipe 310 is pressurized and flows out of the heat dissipation pipe 310, flows into the connecting groove 39 through the cross groove 37 in the first connecting plate, and then flows into the circulation groove 38. Finally, the hydraulic oil delivered below the second connecting plate flows back to the bottom of the second connecting plate, thus realizing the reciprocating cooling of the hydraulic oil.

[0023] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A grinding apparatus for processing new energy batteries, comprising a grinding cylinder (11), characterized in that: The upper end face of the grinding cylinder (11) is connected to a feed pipe (12), the upper end face of the feed pipe (12) is connected to a feed cylinder (13), and the lower end face of the grinding cylinder (11) is provided with a motor (14); it also includes a hydraulic grinding mechanism, the hydraulic grinding mechanism including a grinding disc (21), the lower end face of the grinding disc (21) is connected to the output end of the motor (14), the grinding disc (21) is located inside the grinding cylinder (11) and is rotatably connected to the inner side wall of the grinding cylinder (11), the surface of the grinding disc (21) is provided with a pressure strip (22), and the upper end face of the grinding disc (21) is provided with a pressure strip (22). A conical disc (23) is provided at the center position, and a conveying strip (24) is provided on the surface of the conical disc (23); a heat dissipation mechanism is also included, which includes a pressure plate (31), the pressure plate (31) is located inside the grinding cylinder (11) and is rotatably connected to the grinding cylinder (11), the lower end face of the pressure plate (31) is provided with a slot (32) adapted to the pressure strip (22), the lower end face of the pressure plate (31) is used in conjunction with the upper end face of the grinding disc (21), the upper end face of the pressure plate (31) is provided with an auxiliary cylinder (33), and the conical disc (23) is used in conjunction with the auxiliary cylinder (33).

2. The grinding device for processing new energy batteries according to claim 1, characterized in that: The grinding cylinder (11) has an outlet (15) on its inner side wall and an outlet pipe (16) connected to its outer side wall. The outlet pipe (16) is positioned corresponding to the outlet (15).

3. The grinding device for processing new energy batteries according to claim 2, characterized in that: The upper end face of the grinding cylinder (11) is provided with four sets of hydraulic pipes (25). The upper part of the hydraulic pipe (25) is provided with a partition (26). The lower end face of the partition (26) is provided with a push spring (27). The lower end face of the push spring (27) is connected to a sliding plate (28). The sliding plate (28) is slidably connected to the inner side wall of the hydraulic pipe (25).

4. The grinding device for processing new energy batteries according to claim 3, characterized in that: The inner wall of the hydraulic pipe (25) is slidably connected to a sliding sleeve (29), the lower end face of the sliding sleeve (29) is connected to an intermediate pipe (210), and the lower end face of the intermediate pipe (210) is connected to a sealing disc (211).

5. The grinding apparatus for processing new energy batteries according to claim 4, characterized in that: The hydraulic pipe (25) is provided with a sealing plate (212), which is sealed and abuts against the sealing disc (211). The lower end face of the sliding sleeve (29) is provided with a compression spring (213), and the other end of the compression spring (213) is fixedly connected to the upper end face of the sealing plate (212).

6. The grinding apparatus for processing new energy batteries according to claim 5, characterized in that: The intermediate tube (210) is internally threaded with a threaded sleeve (214), and a plug rod (215) is provided between the threaded sleeves (214). An adjusting spring (216) is provided at the top of the intermediate tube (210), and the other end of the adjusting spring (216) is fixedly connected to the side wall of the threaded sleeve (214). A flow control tube (217) is provided inside the intermediate tube (210), and the flow control tube (217) is used in conjunction with the plug rod (215).

7. The grinding device for processing new energy batteries according to claim 1, characterized in that: The upper surface of the pressure plate (31) is provided with four sets of connecting rods (34). The connecting rods (34) are slidably connected to the grinding cylinder (11). The upper surfaces of the left and right sets of connecting rods (34) are connected to the first connecting plate (35), and the upper surfaces of the front and rear sets of connecting rods (34) are connected to the second connecting plate (36). The first connecting plate (35) and the second connecting plate (36) are both slidably connected to the hydraulic pipe (25).

8. The grinding apparatus for processing new energy batteries according to claim 7, characterized in that: The first connecting plate (35) and the second connecting plate (36) are provided with cross grooves (37), the pressure plate (31) is provided with circulation grooves (38), and the four sets of connecting rods (34) are provided with connecting grooves (39). The cross grooves (37) in the two sets of the first connecting plate (35) and the two sets of the second connecting plate (36) are connected to the circulation grooves (38) through the connecting grooves (39) in the four sets of connecting rods (34).

9. A grinding device for processing new energy batteries according to claim 8, characterized in that: Two sets of hydraulic pipes (25) that are slidably connected to the first connecting plate (35) are connected to two sets of heat dissipation pipes (310) through the outside. The surface of the heat dissipation pipes (310) is provided with multiple sets of heat dissipation fins (311).

10. A grinding device for processing new energy batteries according to claim 9, characterized in that: A buffer plate (312) is slidably connected inside the heat dissipation pipe (310). A buffer spring (313) is provided on the side wall of the buffer plate (312). The other end of the buffer spring (313) is fixedly connected to the side wall of the heat dissipation pipe (310).

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