Self-healing high-voltage capacitor safety protection device

Abstract

This invention provides a self-healing high-voltage capacitor safety protection device, belonging to the field of capacitor protection technology. It includes a cabinet, a capacitor body fixed to the cabinet by support rods, and a mounting plate fixed to the capacitor body. The capacitor body is equipped with a pressure relief protection mechanism located directly below the capacitor body, which provides directional pressure relief protection for the capacitor body. A positioning mechanism is mounted on the mounting plate and adapted to the pressure relief protection mechanism, allowing for the installation and removal of the pressure relief protection mechanism. By implementing the pressure relief protection mechanism, directional pressure relief of the capacitor body is achieved, avoiding dangerous areas along the path and preventing direct spraying of pressure onto surrounding equipment, thus avoiding secondary accidents such as flashover and short circuits, effectively solving the problem of secondary accident hazards.

Description

Technical Field

[0001] This invention relates to the field of capacitor protection technology, and in particular to a self-healing high-voltage capacitor safety protection device. Background Technology

[0002] Self-healing high-voltage capacitors are core equipment for reactive power compensation and voltage regulation in power systems. Their self-healing characteristic is that after a local breakdown of the dielectric, the metallized plating around the breakdown point melts and evaporates rapidly under the high temperature of the electric arc to form an insulating area, allowing the capacitor to return to normal operation. However, under high-voltage conditions, problems such as self-healing failure, increased internal partial discharge, and dielectric aging can easily lead to accidents such as bulging, oil spraying, and explosion. Safety protection devices are key supporting components to ensure their reliable operation and prevent the spread of system faults, and they are the safety barrier of high-voltage capacitors. Currently, capacitors have built-in pressure triggering elements. When a large amount of gas is generated inside the capacitor due to partial discharge or dielectric aging, or when the internal pressure exceeds the rated threshold due to the continuous burning of a self-healing arc, mechanical pressure relief is used to release the internal pressure of the capacitor and prevent explosion. However, pressure relief protection has the problem of secondary hazards. When the pressure relief valve of the capacitor is activated, the insulating oil and gas inside will be directly sprayed onto the surrounding equipment. If the surrounding equipment is live, it is easy to cause secondary accidents such as flashover and short circuit. Existing pressure relief protection does not have a spray guidance and isolation design, which poses a risk of secondary hazards. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a self-healing high-voltage capacitor safety protection device. By incorporating a pressure relief protection mechanism, it enables directional pressure relief of the capacitor body, avoiding dangerous areas along the path and preventing insulating oil and gas from being directly sprayed onto surrounding equipment during pressure relief, thus preventing secondary accidents such as flashover and short circuits. This effectively solves the problem of secondary accident hazards.

[0004] To solve the above-mentioned technical problems, the present invention provides a solution to the problem that when the pressure relief valve of the capacitor pressure relief protection is activated, the internal insulating oil and gas will be sprayed onto the surrounding equipment, posing a secondary hazard risk.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A self-healing high-voltage capacitor safety protection device includes a cabinet, a capacitor body fixed to the cabinet by a support rod, and further includes: A mounting plate is fixed to the capacitor body, and a pressure relief protection mechanism is provided on the capacitor body, with the pressure relief protection mechanism located directly below the capacitor body. The pressure relief protection mechanism is used to provide directional pressure relief protection to the capacitor body; and... A positioning mechanism is installed on the mounting plate, and the positioning mechanism is compatible with the pressure relief protection mechanism. The pressure relief protection mechanism can be installed and removed through the positioning mechanism.

[0006] Preferably, the pressure relief protection mechanism includes: an explosion-proof box disposed below the capacitor body, wherein a plurality of regularly arranged buffer plates are fixed on the explosion-proof box, and a plurality of round holes are provided on the buffer plates.

[0007] Preferably, the positioning mechanism includes: a positioning block fixed on the explosion-proof box; a carrier box fixed on the mounting plate, with a channel for the positioning block to pass through the carrier box; a positioning plate slidably connected to the carrier box via a mounting sleeve a; a positioning groove adapted to the positioning plate on the positioning block; an additional mounting plate a fixed on the carrier box; a guide rod a slidably passing through the additional mounting plate a fixed on the positioning plate; a spring a sleeved on the guide rod a; both ends of the spring a being fixed to the positioning plate and the additional mounting plate a respectively; a movable plate slidably connected to the carrier box via a mounting sleeve b; an additional mounting plate b fixed on the carrier box; a guide rod b slidably passing through the additional mounting plate b fixed on the movable plate; a spring b sleeved on the guide rod b; both ends of the spring b being fixed to the additional mounting plate b and the movable plate respectively; at least two limiting rods fixed on the movable plate; a limiting groove adapted to the limiting rods on the positioning plate; and an unlocking mechanism adapted to the positioning plate provided on the carrier box, the unlocking mechanism being used to release the limiting of the positioning block.

[0008] Preferably, the unlocking mechanism includes: a mounting block fixed on the carrier box, a connecting rod slidably passing through the mounting block, a connecting ring fixed on the connecting rod, and a spring c sleeved on the connecting rod, the two ends of the spring c being fixed to the connecting ring and the mounting block respectively; a pressing plate that slides with the carrier box fixed on the connecting rod, and the pressing plate being slidably connected to a positioning plate; a transmission plate that abuts against the pressing plate fixed on the positioning plate; a through groove opened on the carrier box, and a handle that is slidably connected to the through groove fixed on the connecting rod.

[0009] Preferably, the bottom end of the capacitor body is provided with rectangular grooves and weakening grooves, and the thickness of the rectangular grooves and weakening grooves is less than the thickness of the capacitor body shell.

[0010] Preferably, the buffer plate is U-shaped with the opening facing upwards, and the thickness of the buffer plate is greater than the thickness of the capacitor body shell. The buffer plate is located directly below the pressure relief port of the capacitor body.

[0011] Preferably, one side of the extrusion plate is inclined, and the side of the transmission plate near the extrusion plate is a smooth arc surface.

[0012] Preferably, the length of the through groove is greater than the length of the positioning groove, and both ends of the through groove are set in a semi-circular arc shape.

[0013] Preferably, the inclined length of the extrusion plate is greater than the opening length of the positioning groove, and the center point of the movable plate is collinear with the center point of the channel.

[0014] Preferably, the central axis of the mounting sleeve a is collinear with the central axis of the mounting plate a, and the central axis of the guide rod a is collinear with the central axis of the positioning plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides a self-healing high-voltage capacitor safety protection device. By setting up a pressure relief protection mechanism, it can achieve directional pressure relief of the capacitor body, avoid dangerous areas along the path, and prevent direct spraying onto surrounding equipment during pressure relief, thus avoiding secondary accidents such as flashover and short circuits. This effectively solves the problem of hazards caused by secondary accidents.

[0016] 2. This invention provides a self-healing high-voltage capacitor safety protection device. Through the setting of the positioning mechanism, it can effectively realize the rapid locking and precise positioning of the explosion-proof box. On the one hand, it can significantly improve the work efficiency when installing the explosion-proof box, making the entire installation process faster and smoother and reducing waste. On the other hand, after the explosion-proof box is installed, it can also ensure that it is in a relatively stable state, avoiding shaking or displacement caused by external factors or its own structural problems, thereby further ensuring the functionality and safety of the explosion-proof box.

[0017] 3. This invention provides a self-healing high-voltage capacitor safety protection device. By setting an unlocking mechanism, it can greatly improve the convenience of disassembling and replacing the explosion-proof box after the capacitor body is depressurized. When the explosion-proof box needs to be handled, the operator only needs to pull the handle upward to easily release the locking state of the explosion-proof box, thereby smoothly completing the disassembly and replacement process of the explosion-proof box, improving the convenience of actual operation, and effectively reducing the operation steps and difficulty. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the capacitor body mounting structure inside the cabinet according to the present invention; Figure 2 This is a schematic diagram of the main structure of the cabinet of the present invention; Figure 3 This is a schematic diagram of the capacitor body material distribution structure of the present invention; Figure 4 This is a schematic diagram of the capacitor body and explosion-proof box structure of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure of region A in the middle; Figure 6 This is a side sectional view of the explosion-proof box of the present invention; Figure 7 for Figure 6 Enlarged schematic diagram of the structure of region B in the middle; Figure 8 This is a schematic diagram of the explosion-proof box structure of the present invention; Figure 9 This is a side sectional view of the bearing box of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure of region C in the middle; Figure 11 This is a schematic diagram illustrating the relationship between the positioning mechanism and the unlocking mechanism of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram of the structure of region D in the middle; Figure 13 This is a schematic diagram of the unlocking structure of the present invention.

[0020] Drawing number descriptions: 1. Cabinet; 2. Capacitor body; 3. Mounting plate; 4. Pressure relief protection mechanism; 5. Positioning mechanism; 6. Explosion-proof box; 7. Buffer plate; 8. Round hole; 9. Positioning block; 10. Carrier box; 11. Channel; 12. Mounting sleeve a; 13. Positioning plate; 14. Positioning groove; 15. Add-on plate a; 16. Guide rod a; 17. Spring a; 18. Mounting sleeve b; 19. Movable plate; 20. Add-on plate b; 21. Guide rod b; 22. Spring b; 23. Limiting rod; 24. Limiting groove; 25. Unlocking mechanism; 26. Mounting block; 27. Connecting rod; 28. Connecting ring; 29. ​​Spring c; 30. Extrusion plate; 31. Transmission plate; 32. Through groove; 33. Handle; 34. Rectangular notch; 35. Weakening groove. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0023] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] Example 1: Please refer to Figure 1 - Figure 13 A self-healing high-voltage capacitor safety protection device includes a cabinet 1, a capacitor body 2 fixed on the cabinet 1 by a support rod, and a mounting plate 3 fixed on the capacitor body 2. The capacitor body 2 is provided with a pressure relief protection mechanism 4, which is located directly below the capacitor body 2 and is used to provide directional pressure relief protection for the capacitor body 2. The device also includes a positioning mechanism 5 provided on the mounting plate 3, which is adapted to the pressure relief protection mechanism 4 and is used to assemble and disassemble the pressure relief protection mechanism 4. Among them, the capacitor body 2 has a built-in pressure triggering element. When a large amount of gas is generated inside the capacitor body 2 due to partial discharge or dielectric aging, or when the internal pressure exceeds the rated threshold due to the continuous burning of the self-healing arc, the explosion-proof membrane of the outer shell will rupture, releasing the internal pressure and preventing the self-healing body from exploding. It should be noted that the bottom of the capacitor body 2 is provided with a rectangular groove 34 and a weakening groove 35, and the thickness of the rectangular groove 34 and the weakening groove 35 is less than the thickness of the outer shell of the capacitor body 2. This is a pre-set rupture pressure relief point for the capacitor body 2. The pressure relief protection mechanism 4 is located directly below the rupture pressure relief point, which can more comprehensively receive the splashes of the pressure relief explosion and prevent secondary hazards caused by undirected control during pressure relief, oil and gas splashes, flashover, and fire. It should also be noted that the capacitor body 2 is fixed to the support rod by bolts in sequence, and the capacitor body 2 is installed reasonably according to the configuration inside the cabinet 1. After the installation of the capacitor body 2 is completed, the pressure relief protection mechanism 4 is installed directly below the capacitor body 2 by the positioning mechanism 5, which effectively prevents the occurrence of secondary hazards.

[0026] Furthermore, the pressure relief protection mechanism 4 includes: an explosion-proof box 6 located below the capacitor body 2, a number of regularly arranged buffer plates 7 fixed on the explosion-proof box 6, and a number of round holes 8 opened on the buffer plates 7. The buffer plates 7 are arranged in a U-shape with the opening facing upwards, and the thickness of the buffer plates 7 is less than the thickness of the capacitor body 2. The buffer plates 7 are located directly below the pressure relief port of the capacitor body 2. It should be noted that when the capacitor body 2 experiences a pressure relief protection action, the explosion-proof box 6 bears the explosive splashes during the pressure relief. With the cooperation of the buffer plate 7, the impact force generated during the explosion splashes can be reduced. In conjunction with the setting of the round hole 8, the initial velocity of the oil and gas injection is reduced, and the high-speed direct injection is converted into a low-speed surface flow, reducing the impact and diffusion range. It should also be noted that by installing the explosion-proof box 6 on the capacitor body 2, the pressure generated when the explosion-proof box 6 is depressurized is reduced. In conjunction with the capacitor body 2 being installed on the support rod, the pressure generated when depressurizing can be evenly distributed to various areas of the cabinet 1, avoiding the situation where the explosion-proof box 6 is directly punctured and damaged due to excessive impact pressure. In this solution, the pressure relief protection mechanism 4 is set to achieve directional pressure relief of the capacitor body 2, avoid dangerous areas from the path, and prevent direct spraying to surrounding equipment during pressure relief, thus avoiding secondary accidents such as flashover and short circuit, effectively solving the problem of hazards caused by secondary accidents. The pressure relief protection mechanism 4 protects the capacitor body 2 by centrally protecting the pressure relief port area through the explosion-proof box 6. The buffer plate 7 and the round hole 8 reduce the initial velocity of the oil and gas injection to a certain extent, converting the high-impact splash jet into a low-speed surface flow, and the pressure relief splash is centrally carried by the explosion-proof box 6.

[0027] Example 2: Please refer to Figure 9 - Figure 12 This embodiment further explains the first embodiment, the difference being that it discloses a method for installing the explosion-proof box 6.

[0028] Specifically, the positioning mechanism 5 includes: a positioning block 9 fixed on the explosion-proof box 6; a carrier box 10 fixed on the mounting plate 3, with a channel 11 on the carrier box 10 for the positioning block 9 to pass through; a positioning plate 13 slidably connected to the carrier box 10 via a mounting sleeve a12; a positioning groove 14 on the positioning block 9 that matches the positioning plate 13; an additional mounting plate a15 fixed on the carrier box 10; a guide rod a16 fixed on the positioning plate 13 that slides through the additional mounting plate a15; a spring a17 sleeved on the guide rod a16; the two ends of the spring a17 being fixed to the positioning plate 13 and the additional mounting plate a15 respectively; a movable plate 19 slidably connected to the carrier box 10 via a mounting sleeve b18; and an additional mounting plate b19 fixed on the carrier box 10. 20. A guide rod b21 is fixed on the movable plate 19 and slides through the mounting plate b20. A spring b22 is sleeved on the guide rod b21. The two ends of the spring b22 are fixed to the mounting plate b20 and the movable plate 19 respectively. At least two limiting rods 23 are fixed on the movable plate 19. A limiting groove 24 adapted to the limiting rods 23 is opened on the positioning plate 13. The inclined length of the extrusion plate 30 is greater than the opening length of the positioning groove 14. By setting the inclined length of the extrusion plate 30, it is ensured that the movable plate 19 always stays in contact with the extrusion plate 30. The center point of the movable plate 19 is collinear with the center point of the channel 11. This ensures that when the positioning block 9 is inserted into the channel 11, it can accurately squeeze the movable plate 19 and prevent misalignment. The extrusion plate 30 is inclined on one side, and the transmission plate 31 is smooth arc-shaped on the side close to the extrusion plate 30. The smooth arc-shaped surface of the transmission plate 31 ensures that when the extrusion plate 30 is extruded and transmitted with the transmission plate 31, the transmission plate 31 can drive the positioning plate 13 to move linearly after being subjected to force, thus avoiding jamming during extrusion transmission. The opening length of the through groove 32 is greater than the opening length of the positioning groove 14, and both ends of the through groove 32 are set in a semi-circular arc shape. The opening length of the through groove 32 is the maximum moving distance of the extrusion plate 30, ensuring that when the handle 33 is pulled to the uppermost position, it can drive the positioning plate 13 to completely separate from the positioning groove 14. It should be noted that the positioning mechanism 5 can effectively achieve the effect of quick locking and precise positioning of the explosion-proof box 6. On the one hand, it can significantly improve the work efficiency when installing the explosion-proof box 6, making the entire installation process faster and smoother, reducing unnecessary time waste. On the other hand, after the explosion-proof box 6 is installed, it can also ensure that it is in a relatively stable state, avoiding shaking or displacement caused by external factors or its own structural problems, thereby further ensuring the functionality and safety of the explosion-proof box 6. In this scheme, the principle of positioning mechanism 5 is used: by taking the explosion-proof box 6 and aligning it with the position of channel 11, the explosion-proof box 6 is inserted into the carrier box 10. The positioning block 9 and the movable plate 19 are squeezed together, causing the movable plate 19 to move upward under force, and driving the guide rod b21 to move synchronously. At this time, the spring b22 is in a compressed state, and drives the limiting rod 23 to move upward synchronously, so that the limiting rod 23 separates from the limiting groove 24, thereby releasing the limitation on the positioning plate 13. Using the elastic action of the spring a17, the positioning plate 13 is popped out, causing the positioning plate 13 to engage with the positioning groove 14, thereby completing the purpose of locking and installing the explosion-proof box 6.

[0029] Example 3: Please refer to Figure 5 and Figure 13 This embodiment further illustrates other embodiments, the difference being that it discloses a method for disassembling the explosion-proof box 6.

[0030] Furthermore, the carrier box 10 is provided with an unlocking mechanism 25 adapted to the positioning plate 13. The unlocking mechanism 25 is used to release the limit on the positioning block 9. The unlocking mechanism 25 includes: a mounting block 26 fixed on the carrier box 10, and a connecting rod 27 slidingly passing through the mounting block 26. A connecting ring 28 is fixed on the connecting rod 27, and a spring c29 is sleeved on the connecting rod 27. The two ends of the spring c29 are fixed to the connecting ring 28 and the mounting block 26 respectively. A pressing plate 30 that slides with the carrier box 10 is fixed on the connecting rod 27, and the pressing plate 30 is slidably connected to the positioning plate 13. A transmission plate 31 that abuts against the pressing plate 30 is fixed on the positioning plate 13. A through groove 32 is opened on the carrier box 10, and a handle 33 that is slidably connected to the through groove 32 is fixed on the connecting rod 27. Among them, the central axis of the mounting sleeve a12 is collinear with the central axis of the mounting plate a15, and the central axis of the guide rod a16 is collinear with the central axis of the positioning plate 13. With the arrangement of the mounting sleeve a12 and the mounting plate a15, a straight guide can be formed on the positioning plate 13, ensuring that the positioning plate 13 maintains a relatively stable movement state when subjected to force, and improving the stability of unlocking the explosion-proof box 6. It should be noted that by setting the unlocking mechanism 25, the convenience of disassembling and replacing the explosion-proof box 6 after the capacitor body 2 experiences a pressure relief can be greatly improved. When the explosion-proof box 6 needs to be handled, the operator only needs to pull the handle 33 upward to easily release the locked state of the explosion-proof box 6, thereby smoothly completing the disassembly and replacement process of the explosion-proof box 6, improving the convenience required in actual operation, and effectively reducing the operation steps and difficulty. In this scheme, the unlocking mechanism 25 is used to unlock the explosion-proof box 6. The unlocking principle is as follows: by pulling the handle 33 upward, the two connecting rods 27 move upward synchronously, driving the connecting ring 28 to move synchronously. At this time, the spring c29 is under pressure, which in turn drives the pressing plate 30 to move upward synchronously. Utilizing the pressing transmission action between the pressing plate 30 and the transmission plate 31, the force is decomposed into a horizontal driving force by the inclined surface of the pressing plate 30, which is then converted into a horizontal linear motion of the positioning plate 13. This achieves a vertical conversion of the motion direction and the transmission of force, thereby driving the positioning plate 13 to move and release the limit on the explosion-proof box 6. Utilizing the elastic action of the spring b22, the limit rod 23 is driven to rebound and reset, causing the limit rod 23 to engage with the limit groove 24, completing the limit on the positioning plate 13. The explosion-proof box 6 can then be pulled out to complete the disassembly.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A self-healing high-voltage capacitor safety protection device, comprising a cabinet (1) and a capacitor body (2) fixed on the cabinet (1) by a support rod. Its features are, Also includes: A mounting plate (3) is fixed on the capacitor body (2), and a pressure relief protection mechanism (4) is provided on the capacitor body (2), and the pressure relief protection mechanism (4) is located directly below the capacitor body (2). The pressure relief protection mechanism (4) is used to provide directional pressure relief protection for the capacitor body (2); and, A positioning mechanism (5) is installed on the mounting plate (3), and the positioning mechanism (5) is adapted to the pressure relief protection mechanism (4). The pressure relief protection mechanism (4) is disassembled and assembled through the positioning mechanism (5).

2. The self-healing high-voltage capacitor safety protection device according to claim 1, characterized in that, The pressure relief protection mechanism (4) includes: an explosion-proof box (6) located below the capacitor body (2), and a number of regularly arranged buffer plates (7) are fixed on the explosion-proof box (6), and a number of round holes (8) are opened on the buffer plates (7).

3. The self-healing high-voltage capacitor safety protection device according to claim 1, characterized in that, The positioning mechanism (5) includes: a positioning block (9) fixed on the explosion-proof box (6); a carrier box (10) fixed on the mounting plate (3); a channel (11) for the positioning block (9) to pass through the carrier box (10); a positioning plate (13) slidably connected to the carrier box (10) via a mounting sleeve (12); a positioning groove (14) adapted to the positioning plate (13) on the positioning block (9); an mounting plate (15) fixed on the carrier box (10); a guide rod (16) slidably passing through the mounting plate (15) fixed on the positioning plate (13); a spring (17) sleeved on the guide rod (16); and the two ends of the spring (17) fixed to the positioning plate (13) and the mounting plate (15) respectively. A movable plate (19) is slidably connected to the carrier box (10) via an installation sleeve (18), and an additional plate (20) is fixed on the carrier box (10). A guide rod (21) is fixed on the movable plate (19) and slides through the additional plate (20). A spring (22) is sleeved on the guide rod (21). The two ends of the spring (22) are fixed to the additional plate (20) and the movable plate (19) respectively. At least two limiting rods (23) are fixed on the movable plate (19), and a limiting groove (24) adapted to the limiting rods (23) is opened on the positioning plate (13). An unlocking mechanism (25) adapted to the positioning plate (13) is provided on the carrier box (10). The unlocking mechanism (25) is used to release the limiting of the positioning block (9).

4. The self-healing high-voltage capacitor safety protection device according to claim 3, characterized in that, The unlocking mechanism (25) includes: a mounting block (26) fixed on the carrier box (10), and a connecting rod (27) slidably passing through the mounting block (26), and a connecting ring (28) fixed on the connecting rod (27), and a spring c (29) sleeved on the connecting rod (27), the two ends of the spring c (29) being fixed to the connecting ring (28) and the mounting block (26) respectively, a pressing plate (30) sliding with the carrier box (10) fixed on the connecting rod (27), and the pressing plate (30) slidably connected with the positioning plate (13), a transmission plate (31) abutting against the pressing plate (30) fixed on the positioning plate (13), a through groove (32) opened on the carrier box (10), and a handle (33) slidably connected to the through groove (32) fixed on the connecting rod (27).

5. The self-healing high-voltage capacitor safety protection device according to claim 1, characterized in that, The bottom end of the capacitor body (2) is provided with a rectangular groove (34) and a weakening groove (35), and the thickness of the rectangular groove (34) and the weakening groove (35) is less than the thickness of the outer shell of the capacitor body (2).

6. The self-healing high-voltage capacitor safety protection device according to claim 2, characterized in that, The buffer plate (7) is arranged in a U-shape with the opening facing upward, and the thickness of the buffer plate (7) is less than the thickness of the capacitor body (2). The buffer plate (7) is located directly below the pressure relief port of the capacitor body (2).

7. The self-healing high-voltage capacitor safety protection device according to claim 4, characterized in that, The extrusion plate (30) is inclined on one side, and the transmission plate (31) is smooth arc-shaped on the side close to the extrusion plate (30).

8. A self-healing high-voltage capacitor safety protection device according to claim 4, characterized in that, The opening length of the through groove (32) is greater than the opening length of the positioning groove (14), and both ends of the through groove (32) are set in a semi-circular arc shape.

9. A self-healing high-voltage capacitor safety protection device according to claim 4, characterized in that, The inclined length of the extrusion plate (30) is greater than the opening length of the positioning groove (14), and the center point of the movable plate (19) is collinear with the center point of the channel (11).

10. A self-healing high-voltage capacitor safety protection device according to claim 3, characterized in that, The central axis of the mounting sleeve a (12) is collinear with the central axis of the mounting plate a (15), and the central axis of the guide rod a (16) is collinear with the central axis of the positioning plate (13).

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