An explosion-proof structure for a passive filter capacitor and its explosion-proof method

Abstract

The present invention belongs to the technical field of capacitor explosion protection, and provides an explosion protection structure and an explosion protection method for a passive filter capacitor. An explosion protection structure for a passive filter capacitor includes a box body, in which a temperature-controlled overcurrent protection device is arranged. The temperature-controlled overcurrent protection device is connected to the working circuit of the passive filter capacitor. A number of partition boards are arranged in the box body in an array, and ventilation grooves are arranged at positions of the partition boards close to the bottom of the box body. An end cover is slidably and sealingly connected to the inner wall of the box body, and a retaining seat for limiting the end cover is elastically connected to the inner wall of the box body. The end cover is fixedly connected with a number of baffle plates, and hydraulic oil is stored in the baffle plates. An explosion protection structure for a passive filter capacitor closes the ventilation grooves through the baffle plates, thereby isolating all the capacitors between the respective partition boards and preventing the explosion from affecting the safety of other capacitors.

Description

Technical Field

[0001] The invention belongs to the technical field of capacitor explosion protection, and particularly relates to an explosion protection structure for a passive filter capacitor and an explosion protection method therefor. Background Art

[0002] A capacitor is an electronic component used to store electric charge. A capacitor consists of two conductor plates separated by a dielectric. Capacitors are widely used in electronic devices and can be used for blocking direct current, coupling, bypassing, filtering, tuning circuits, energy conversion, and control circuits, etc. Capacitors will explode under the conditions of overvoltage, overcurrent, and too high temperature.

[0003] An existing intelligent explosion-proof capacitor combination module with the publication number of CN113727564B includes a base, a mounting frame, a fixing box, a dust removal box, and an exhaust box. An installation frame for placing a capacitor module is fixedly installed on the upper surface of the base. A fixing box is fixedly installed on one side surface of the installation frame, and a dust removal box is fixedly installed on the upper surface of the fixing box. In the invention, pulling a handle on one side can drive a limiting slide bar to slide at the port of the installation frame, and then drive a porous filter screen to slide out from the through slot opening. The porous filter screen will drive a weight slider to move above the lifting cavity, and finally the limiting slide bar will drive the porous filter screen to move to the other end of the installation frame. Under the magnetic attraction of a magnet, the limiting slide bar can be kept fixed. On the one hand, the porous filter screen can well fix the capacitor group inside the installation frame, playing a certain role in ventilation and heat dissipation. On the other hand, it has a good filtering effect to prevent external dust from entering the installation frame.

[0004] Although the above solution can provide good ventilation for the capacitor module, when one capacitor explodes due to overcurrent or overvoltage, a chain explosion will occur among all the capacitors in the capacitor module, causing great losses. Some existing capacitor explosion protection structures also enclose the capacitors through elastic devices to reduce the impact of capacitor explosion. However, the high-temperature explosive substances and high-temperature dust generated during capacitor explosion are easy to contact other capacitors, resulting in a chain explosion. Summary of the Invention

[0005] The purpose of the invention is to provide an explosion protection structure for a passive filter capacitor and an explosion protection method therefor, aiming to solve the technical problem that when a capacitor explodes due to overcurrent or overvoltage in the prior art, a chain explosion will occur among all the capacitors in the capacitor module, causing great losses.

[0006] The invention is realized as follows. An explosion protection structure for a passive filter capacitor includes a box body. A temperature control overcurrent protection device is arranged in the box body and is connected to the working circuit of the passive filter capacitor. A plurality of partition plates are arranged in the box body in an array, and ventilation slots are arranged at positions of the partition plates close to the bottom of the box body.

[0007] The inner wall of the box is slidably and sealingly connected with an end cover. The inner wall of the box is elastically connected with a retaining seat for limiting the end cover. The end cover is fixedly connected with a plurality of baffles, and each baffle is slidably connected in a partition plate. Hydraulic oil is stored in the baffle. A suction assembly is arranged at the bottom of the partition plate. When the temperature control overcurrent protection device is disconnected, the suction assembly can drive the baffle to slide down to the bottom of the partition plate;

[0008] A filter screen cover is arranged on one side of each baffle. A piston is slidably and sealingly connected in the filter screen cover. The filter screen cover is fixedly connected with a guide rod. A connecting mechanism is arranged between the guide rod and the piston. A filter plate is spirally arranged outside the connecting mechanism. When the filter screen cover moves upward, the connecting mechanism drives the filter plate to rotate spirally;

[0009] The end cover is provided with a cavity, and a filtering mechanism is arranged at intervals in the cavity. The filtering mechanism can filter impurities in the air;

[0010] Ventilation holes are formed in both side walls of the end cover, and guide grooves are formed in both side walls of the box. When the baffle moves to the bottom of the box, the ventilation holes are aligned with the guide grooves.

[0011] Further technical solution: The connecting mechanism includes a rotating sleeve, a sleeve, a spring and a guiding component;

[0012] The rotating sleeve is slidably connected with the guide rod. One end of the sleeve is rotatably connected with the rotating sleeve, and the other end of the sleeve is rotatably connected with the piston. The spring is arranged between the rotating sleeve and the piston. The guiding component is arranged between the sleeve and the guide rod. When the rotating sleeve slides along the guide rod, under the action of the guiding component, the sleeve rotates reciprocally, and the filter plate is fixedly connected with the outer wall of the sleeve.

[0013] Further technical solution: The guiding component includes a guide rail, a universal ball and a connecting rod;

[0014] The guide rail is arranged on the surface of the guide rod and is bent along the surface of the guide rod. The universal ball is slidably connected in the guide rail. One end of the connecting rod is universally connected with the universal ball, and the other end of the connecting rod is fixedly connected with the inner wall of the sleeve.

[0015] Further technical solution: The filtering mechanism includes a rotating shaft and a net plate. The rotating shaft is rotatably connected with the inner wall of the cavity, and a plurality of net plates are fixedly connected annularly along the outer surface of the rotating shaft. The rotating shafts are all communicated with the baffle through hoses, and a plurality of oil discharge holes are arranged on the rotating shaft.

[0016] Further technical solution: Magnet blocks are fixedly connected to the inner walls of the cavities on both sides of the rotating shaft, and iron blocks are arranged at the frame of the mesh plate far from the rotating shaft. The magnet blocks can generate a suction force on the iron blocks.

[0017] Further technical solution: The suction component includes an electromagnetic block, a magnetic ring, and a sliding push seat.

[0018] Electromagnetic blocks are fixedly connected to the bottoms of the partition plates, a magnetic ring is fixedly arranged at the bottom of the baffle, and the electromagnetic block faces the magnetic ring. Sliding push seats are slidably and sealingly connected to the inner walls of the baffle, and one end of the sliding push seat extends out of the bottom of the baffle.

[0019] Further technical solution: A blower is arranged outside the box body, and the blower faces the ventilation slot.

[0020] Further technical solution: The connecting rod is an elastic telescopic rod, and lubricating oil is arranged inside the connecting rod. The lubricating oil can overflow from one end of the connecting rod to lubricate the universal ball.

[0021] An explosion-proof method for a passive filter capacitor, which is applied to the explosion-proof structure of any one of the above-mentioned passive filter capacitors, includes the following steps:

[0022] Step S1: The temperature control overcurrent protection device can automatically detect the temperature and current of the capacitor. When the temperature or current of the capacitor exceeds the standard, the temperature control overcurrent protection device is disconnected, and the capacitor branch is cut off, so that the capacitor no longer overheats.

[0023] Step S2: When the temperature control overcurrent protection device is automatically disconnected, the suction component can drive the baffle to slide down to the bottom of the partition plate, and the ventilation slot is closed by the baffle, so that all the capacitors are blocked between the partition plates.

[0024] Step S3: When one of the capacitors explodes, the airflow pushes the piston, and the piston slides along the filter screen cover. At this time, the explosive remains in the box body under the barrier of the filter screen cover, and the airflow passes through the filter plate, and the filter plate filters and blocks the high-temperature dust in the airflow.

[0025] Step S4: When the filter screen cover moves upward, the connecting mechanism drives the filter plate to rotate spirally.

[0026] Step S5: When the airflow enters the cavity, the filtering mechanism can further filter the high-temperature dust impurities in the air.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. An explosion-proof structure for passive filter capacitors. When the temperature-controlled overcurrent protection device is automatically disconnected, the temperature-controlled overcurrent protection device transmits a signal to the electromagnetic block, the electromagnetic block absorbs the magnetic ring, the magnetic ring drives the baffle to move down, and the ventilation slot is closed by the baffle, thereby blocking all capacitors between the partitions to prevent the explosion from affecting the safety of other capacitors;

[0029] 2. An explosion-proof structure for passive filter capacitors. When one of the capacitors explodes, the airflow pushes the piston, and the piston slides along the filter cover. At this time, the explosive is blocked by the filter cover and remains in the box. The airflow passes through the filter plate, and the filter plate filters and blocks the high-temperature dust in the airflow. During this process, if the filter plate is partially blocked, the airflow can still flow upward along the filter plate for filtering, avoiding the airflow being blocked during the explosion and causing the box to explode;

[0030] 3. An explosion-proof structure for passive filter capacitors. When the sleeve moves upward, the sleeve drives the universal ball to slide in the guide rail through the connecting rod. Under the guidance of the guide rail, the sleeve moves upward and reciprocates. The sleeve drives the filter plate to reciprocate, thereby increasing the contact area between the filter plate and the airflow and enhancing the filtering effect of the filter plate on high-temperature dust in the airflow;

[0031] 4. An explosion-proof structure for passive filter capacitors. When the airflow enters the cavity, the high-temperature dust in the airflow is further filtered through multiple mesh plates. When one of the mesh plates is blocked, the airflow drives the shaft to rotate, and the shaft drives the other mesh plate to move between two magnetic blocks. The magnetic blocks adsorb the mesh plate to prevent the airflow from being blocked in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 is a cross-sectional view of the box;

[0034] Figure 3 Schematic diagram of the internal structure of the box;

[0035] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0036] Figure 5 for Figure 3 A magnified schematic diagram of the middle B area;

[0037] Figure 6 is an inner cross-sectional view of the filter cover;

[0038] Figure 7 is a structural schematic diagram of the connecting mechanism;

[0039] Figure 8 is Figure 7 an enlarged schematic view of area C in

[0040] In the attached drawings: 1. Box body; 2. Partition board; 3. End cover; 4. Ventilation groove; 5. Stop seat; 6. Baffle; 7. Suction assembly; 71. Electromagnetic block; 72. Magnetic ring; 73. Sliding push seat; 8. Connecting mechanism; 81. Rotating sleeve; 82. Sleeve; 83. Spring; 84. Guide assembly; 841. Guide rail; 842. Universal ball; 843. Connecting rod; 9. Filter mechanism; 91. Rotating shaft; 92. Mesh plate; 93. Magnetic block; 10. Filter screen cover; 11. Piston; 12. Guide rod; 13. Cavity; 14. Ventilation hole; 15. Guide groove; 16. Fan; 17. Filter plate. Specific embodiments

[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0043] As Figures 1-8 shown, a kind of explosion-proof structure for a passive filter capacitor provided by the present invention includes a box body 1, a temperature control overcurrent protection device is arranged in the box body 1, the temperature control overcurrent protection device is connected to the working circuit of the passive filter capacitor, and a plurality of partition boards 2 are arranged in the box body 1 in an array, and ventilation grooves 4 are arranged at positions of the partition boards 2 close to the bottom of the box body 1;

[0044] An end cover 3 is slidably and sealingly connected to the inner wall of the box body 1, a stop seat 5 for limiting the end cover 3 is elastically connected to the inner wall of the box body 1, a plurality of baffles 6 are fixedly connected to the end cover 3, each baffle 6 is slidably connected in the partition board 2, hydraulic oil is stored in the baffle 6, and a suction assembly 7 is arranged at the bottom of the partition board 2. When the temperature control overcurrent protection device is disconnected, the suction assembly 7 can drive the baffle 6 to slide down to the bottom of the partition board 2;

[0045] Filter screen covers 10 are arranged on one side of each baffle 6, pistons 11 are slidably and sealingly connected in the filter screen covers 10, guide rods 12 are fixedly connected to the filter screen covers 10, a connecting mechanism 8 is arranged between the guide rods 12 and the pistons 11, and a filter plate 17 is spirally arranged outside the connecting mechanism 8. When the filter screen cover 10 moves upward, the connecting mechanism 8 drives the filter plate 17 to rotate spirally;

[0046] The end cover 3 is provided with a cavity 13, and a filter mechanism 9 is arranged at intervals in the cavity 13. The filter mechanism 9 can filter impurities in the air;

[0047] Both side walls of the end cap 3 are provided with ventilation holes 14, and both side walls of the box body 1 are provided with guide grooves 15. When the baffle 6 moves to the bottom of the box body 1, the ventilation holes 14 are aligned with the guide grooves 15.

[0048] In this solution, the temperature-controlled overcurrent protection device can automatically detect the temperature and current of the capacitor. When the temperature or current of the capacitor exceeds the standard, the temperature-controlled overcurrent protection device is disconnected, the capacitor branch is cut off, so that the capacitor no longer overheats, preventing the possibility of fire, reducing the risk of capacitor use, and minimizing the risk of capacitor use.

[0049] When the capacitor is working, the temperature of the capacitor is dissipated outward through the ventilation grooves 4;

[0050] When the temperature-controlled overcurrent protection device is automatically disconnected, the suction assembly 7 can drive the baffle 6 to slide down to the bottom of the partition 2, and the ventilation grooves 4 are closed by the baffle 6, so as to block all capacitors between the partitions 2, avoiding the explosion from affecting the safety of other capacitors;

[0051] When one of the capacitors explodes, the airflow pushes the piston 11, and the piston 11 slides along the filter screen cover 10. At this time, the explosive remains in the box body 1 under the block of the filter screen cover 10, and the airflow passes through the filter plate 17. The filter plate 17 filters and blocks the high-temperature dust in the airflow. During this process, if part of the filter plate 17 is blocked, the airflow can still flow upward along the filter plate 17 for filtration, avoiding the airflow being blocked during the explosion and causing the box body 1 to explode;

[0052] When the filter screen cover 10 moves upward, the connecting mechanism 8 drives the filter plate 17 to rotate spirally, thereby increasing the contact area between the filter plate 17 and the airflow and enhancing the filtering effect of the filter plate 17 on the high-temperature dust in the airflow;

[0053] When the airflow enters the cavity 13, the filtering mechanism 9 can further filter the high-temperature dust impurities in the air.

[0054] As Figure 7 shown, as a preferred embodiment of the present invention, the connecting mechanism 8 includes a rotating sleeve 81, a sleeve 82, a spring 83 and a guiding component 84;

[0055] The rotating sleeve 81 is slidably connected with the guiding rod 12. One end of the sleeve 82 is rotatably connected with the rotating sleeve 81, and the other end of the sleeve 82 is rotatably connected with the piston 11. The spring 83 is arranged between the rotating sleeve 81 and the piston 11. The guiding component 84 is arranged between the sleeve 82 and the guiding rod 12. When the rotating sleeve 81 slides along the guiding rod 12, under the action of the guiding component 84, the sleeve 82 reciprocally rotates, and the filter plate 17 is fixedly connected with the outer wall of the sleeve 82.

[0056] In the connecting mechanism 8, when an explosion occurs, the airflow impacts the piston 11. The piston 11 drives the sleeve 82 to move upward. The sleeve 82 drives the rotating sleeve 81 to slide upward along the guide rod 12, and the sleeve 82 drives the filter plate 17 to move upward.

[0057] As Figure 8 shown, as a preferred embodiment of the present invention, the guiding assembly 84 includes a guide rail 841, a universal ball 842, and a connecting rod 843;

[0058] The guide rail 841 is arranged on the surface of the guide rod 12, and the guide rail 841 is bent along the surface of the guide rod 12. The universal ball 842 is slidably connected in the guide rail 841. One end of the connecting rod 843 is universally connected to the universal ball 842, and the other end of the connecting rod 843 is fixedly connected to the inner wall of the sleeve 82.

[0059] In the guiding assembly 84, when the sleeve 82 moves upward, the sleeve 82 drives the universal ball 842 to slide in the guide rail 841 through the connecting rod 843. Under the guiding action of the guide rail 841, while the sleeve 82 moves upward, it rotates reciprocally. The sleeve 82 drives the filter plate 17 to rotate reciprocally, thereby increasing the contact area between the filter plate 17 and the airflow and enhancing the filtering effect of the filter plate 17 on the high-temperature dust in the airflow.

[0060] As Figure 4 shown, as a preferred embodiment of the present invention, the filtering mechanism 9 includes a rotating shaft 91 and a mesh plate 92. The rotating shaft 91 is rotatably connected to the inner wall of the cavity 13, and a plurality of mesh plates 92 are fixedly connected to the outer surface of the rotating shaft 91 in a circular shape. The rotating shaft 91 is communicated with the baffle 6 through a hose, and a plurality of oil discharge holes are provided on the rotating shaft 91.

[0061] Magnetic blocks 93 are fixedly connected to the inner walls of the cavity 13 on both sides of the rotating shaft 91, and iron blocks are provided at the frame of the mesh plate 92 away from the rotating shaft 91. The magnetic blocks 93 can generate a suction force on the iron blocks.

[0062] In the filtering mechanism 9, the high-temperature dust in the airflow is further filtered by a plurality of mesh plates 92. When one of the mesh plates 92 is blocked, the airflow pushes the rotating shaft 91 to rotate. The rotating shaft 91 drives another mesh plate 92 to move between the two magnetic blocks 93, and the magnetic blocks 93 adsorb this mesh plate 92 to prevent the airflow from being blocked in the cavity 13.

[0063] As Figure 5 shown, as a preferred embodiment of the present invention, the suction force assembly 7 includes an electromagnetic block 71, a magnetic ring 72, and a sliding push seat 73;

[0064] The bottom of the partition plate 2 is fixedly connected with an electromagnet block 71, the bottom of the baffle 6 is fixedly provided with a magnetic ring 72, and the electromagnet block 71 faces the magnetic ring 72. The inner walls of the baffle 6 are all slidably and hermetically connected with sliding push seats 73. One end of the sliding push seat 73 extends out of the bottom of the baffle 6, and the electromagnet block 71 is electrically connected with the temperature-controlled overcurrent protection device.

[0065] In the suction assembly 7, when the temperature-controlled overcurrent protection device is disconnected, the temperature-controlled overcurrent protection device transmits a signal to the electromagnet block 71. The electromagnet block 71 adsorbs the magnetic ring 72, and the magnetic ring 72 drives the baffle 6 to move downward. At this time, the electromagnet block 71 pushes the sliding push seat 73, and the sliding push seat 73 pushes the hydraulic oil in the baffle 6 into the rotating shaft 91, thereby lubricating the mesh plate 92 and preventing the high-temperature dust in the air flow from scalding the mesh plate 92.

[0066] As Figure 1 shown, as a preferred embodiment of the present invention, a blower 16 is provided outside the box body 1, and the blower 16 faces the ventilation groove 4.

[0067] As a preferred embodiment of the present invention, the connecting rod 843 is an elastic telescopic rod, and lubricating oil is provided inside the connecting rod 843. The lubricating oil can overflow from one end of the connecting rod 843 and lubricate the universal ball 842.

[0068] An explosion-proof method for a passive filter capacitor, which is applied to the explosion-proof structure of the passive filter capacitor in the above embodiment, includes the following steps:

[0069] Step S1: The temperature-controlled overcurrent protection device can automatically detect the temperature and current of the capacitor. When the temperature or current of the capacitor exceeds the standard, the temperature-controlled overcurrent protection device is disconnected, the capacitor branch is cut off, so that the capacitor no longer overheats, preventing the possibility of fire, reducing the risk of capacitor use, and minimizing the risk of capacitor use.

[0070] Step S2: When the temperature-controlled overcurrent protection device is automatically disconnected, when the temperature-controlled overcurrent protection device is disconnected, the temperature-controlled overcurrent protection device transmits a signal to the electromagnet block 71. The electromagnet block 71 adsorbs the magnetic ring 72, and the magnetic ring 72 drives the baffle 6 to move downward. The ventilation groove 4 is closed by the baffle 6, so that all capacitors are blocked between the partition plates 2, avoiding the explosion from affecting the safety of other capacitors;

[0071] At this time, the electromagnet block 71 pushes the sliding push seat 73, and the sliding push seat 73 pushes the hydraulic oil in the baffle 6 into the rotating shaft 91, thereby lubricating the mesh plate 92 and preventing the high-temperature dust in the air flow from scalding the mesh plate 92;

[0072] Step S3: When one of the capacitors explodes, the airflow pushes the piston 11, and the piston 11 slides along the filter cover 10. At this time, the explosive is blocked by the filter cover 10 and remains in the box 1. The airflow passes through the filter plate 17, and the filter plate 17 filters and blocks the high-temperature dust in the airflow. During this process, if the filter plate 17 is partially blocked, the airflow can still flow upward along the filter plate 17 for filtering, thereby avoiding the airflow being blocked during the explosion and causing the box 1 to explode;

[0073] Step S4: When the sleeve 82 moves upward, the sleeve 82 drives the universal ball 842 to slide in the guide rail 841 through the connecting rod 843. Under the guidance of the guide rail 841, the sleeve 82 moves upward and reciprocates, and the sleeve 82 drives the filter plate 17 to reciprocate, thereby increasing the contact area between the filter plate 17 and the airflow, and enhancing the filtering effect of the filter plate 17 on the high-temperature dust in the airflow;

[0074] Step S5: When the airflow enters the cavity 13, the high-temperature dust in the airflow is further filtered through multiple mesh plates 92. When one of the mesh plates 92 is blocked, the airflow pushes the rotating shaft 91 to rotate, and the rotating shaft 91 drives the other mesh plate 92 to move between the two magnetic blocks 93. The magnetic blocks 93 adsorb the mesh plate 92 to prevent the airflow from being blocked in the cavity 13.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0076] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An explosion-proof structure for a passive filter capacitor, comprising a box body (1), wherein a temperature-controlled overcurrent protection device is arranged in the box body (1), and the temperature-controlled overcurrent protection device is connected to the working circuit of the passive filter capacitor, and is characterized in that, A number of partition plates (2) are arranged in the box body (1), and ventilation grooves (4) are provided at positions of the partition plates (2) close to the bottom of the box body (1); An end cover (3) is slidably and sealingly connected to the inner wall of the box body (1), a retaining seat (5) for limiting the end cover (3) is elastically connected to the inner wall of the box body (1), the end cover (3) is fixedly connected with a number of baffle plates (6), each baffle plate (6) is slidably connected in the partition plate (2), hydraulic oil is stored in the baffle plate (6), and a suction assembly (7) is arranged at the bottom of the partition plate (2). When the temperature control overcurrent protection device is disconnected, the suction assembly (7) can drive the baffle plate (6) to slide down to the bottom of the partition plate (2); A filter screen cover (10) is arranged on one side of each baffle plate (6), a piston (11) is slidably and sealingly connected in the filter screen cover (10), the filter screen cover (10) is fixedly connected with a guide rod (12), a connecting mechanism (8) is arranged between the guide rod (12) and the piston (11), and a filter plate (17) is spirally arranged outside the connecting mechanism (8). When the filter screen cover (10) moves upward, the connecting mechanism (8) drives the filter plate (17) to rotate spirally; The end cover (3) is provided with a cavity (13), and a filtering mechanism (9) is arranged at intervals in the cavity (13), and the filtering mechanism (9) can filter impurities in the air; Ventilation holes (14) are formed in both side walls of the end cover (3), and guide grooves (15) are formed in both side walls of the box body (1). When the baffle plate (6) moves to the bottom of the box body (1), the ventilation holes (14) are aligned with the guide grooves (15); The suction assembly (7) includes an electromagnet (71), a magnetic ring (72) and a sliding push seat (73); Electromagnets (71) are fixedly connected to the bottoms of the partition plates (2), magnetic rings (72) are fixedly arranged at the bottoms of the baffle plates (6), and the electromagnets (71) face the magnetic rings (72). Sliding push seats (73) are slidably and sealingly connected to the inner walls of the baffle plates (6), and one ends of the sliding push seats (73) extend out of the bottoms of the baffle plates (6).

2. The explosion-proof structure for the capacitor of the passive filter according to claim 1, characterized in that, The connecting mechanism (8) includes a rotating sleeve (81), a sleeve (82), a spring (83) and a guiding assembly (84); The rotating sleeve (81) is slidably connected to the guide rod (12), one end of the sleeve (82) is rotatably connected to the rotating sleeve (81), and the other end of the sleeve (82) is rotatably connected to the piston (11). The spring (83) is arranged between the rotating sleeve (81) and the piston (11). The guiding assembly (84) is arranged between the sleeve (82) and the guide rod (12). When the rotating sleeve (81) slides along the guide rod (12), under the action of the guiding assembly (84), the sleeve (82) rotates reciprocally, and the filter plate (17) is fixedly connected to the outer wall of the sleeve (82).

3. The explosion-proof structure for a passive filter capacitor according to claim 2, characterized in that, The guiding assembly (84) includes a guide rail (841), a universal ball (842) and a connecting rod (843); The guide rail (841) is arranged on the surface of the guide rod (12), and the guide rail (841) is bent along the surface of the guide rod (12). The universal ball (842) is slidably connected in the guide rail (841). One end of the connecting rod (843) is universally connected to the universal ball (842), and the other end of the connecting rod (843) is fixedly connected to the inner wall of the sleeve (82).

4. An explosion-proof structure for a capacitor of a passive filter according to claim 1, characterized in that, The filtering mechanism (9) includes a rotating shaft (91) and a mesh plate (92). The rotating shaft (91) is rotatably connected to the inner wall of the cavity (13), and a plurality of mesh plates (92) are fixedly connected to the outer surface of the rotating shaft (91) in a ring shape. The rotating shaft (91) is communicated with the baffle (6) through a hose, and a plurality of oil discharge holes are arranged on the rotating shaft (91).

5. An explosion-proof structure for a capacitor of a passive filter according to claim 4, characterized in that, Magnetic blocks (93) are fixedly connected to the inner walls of the cavity (13) on both sides of the rotating shaft (91), and iron blocks are arranged at the frame of the mesh plate (92) away from the rotating shaft (91). The magnetic blocks (93) can generate a suction force on the iron blocks.

6. The explosion-proof structure for a capacitor of a passive filter according to claim 1, wherein, A blower (16) is arranged outside the box body (1), and the blower (16) is facing the ventilation slot (4).

7. An explosion-proof structure for a capacitor of a passive filter according to claim 3, characterized in that, The connecting rod (843) is an elastic telescopic rod, and lubricating oil is arranged inside the connecting rod (843). The lubricating oil can overflow from one end of the connecting rod (843) to lubricate the universal ball (842).

8. An explosion-proof method for a passive filter capacitor, applied to the explosion-proof structure of the passive filter capacitor according to any one of claims 1-7, characterized in that, Including the following steps: Step S1: The temperature control overcurrent protection device can automatically detect the temperature and current of the capacitor. When the temperature or current of the capacitor exceeds the standard, the temperature control overcurrent protection device is disconnected, the capacitor branch is cut off, and the capacitor no longer continues to overheat. Step S2: When the temperature control overcurrent protection device is automatically disconnected, the suction assembly (7) can drive the baffle (6) to slide down to the bottom of the partition (2), and the ventilation slot (4) is closed by the baffle (6), so as to block all the capacitors between the partitions (2). Step S3: When one of the capacitors explodes, the airflow pushes the piston (11), and the piston (11) slides along the filter screen cover (10). At this time, the explosive remains in the box body (1) under the block of the filter screen cover (10), and the airflow passes through the filter plate (17), and the filter plate (17) filters and blocks the high-temperature dust in the airflow. Step S4: When the filter screen cover (10) moves upward, the connecting mechanism (8) drives the filter plate (17) to rotate spirally. Step S5: When the airflow enters the cavity (13), the filtering mechanism (9) can further filter the high-temperature dust impurities in the air.

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