Fully-sealed high-capacity capacitor

Abstract

The utility model relates to the technical field of capacitors, in particular to a fully-sealed high-capacity capacitor, which comprises an explosion-proof shell, a terminal, a bottom plate and a capacitor core. According to the fully-sealed high-capacity capacitor, the explosion sealing performance of the isolation plate and the explosion-proof membrane is improved, meanwhile, the expansion of the explosion-proof membrane is used for relieving the air pressure increase caused by heat generated by the operation of the capacitor core, the deformation and cracking caused by the increase of the internal pressure of the explosion-proof shell are effectively prevented, and the explosion-proof membrane can be recovered for continuous use, so that the service life of the capacitor is prolonged. When conditions such as top-speed temperature rise occur due to a fault, the explosion-proof membrane can violently bulge to release pressure, explosion is avoided, and the violently bulge of the explosion-proof membrane can push the push plate upwards and enable the capacitor plug to be separated from the capacitor interface, so that a circuit is cut off; the capacitor plug and the push plate can be adjusted by rotating the top plate so as to adjust the temperature when the circuit is cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a fully sealed large-capacity capacitor. Background Art

[0002] The capacitors currently on the market do not have a heat dissipation structure and do not have an explosion-proof power-off structure, which cannot guarantee the safety of capacitor use. The existing application number is CN202321536885.8, a fully sealed large-capacity capacitor, including a shell, a heat dissipation mechanism is connected to the inside of the shell, and the heat dissipation mechanism is connected to an explosion-proof power-off mechanism... When the capacitor is overheated, the capacitor can be powered off in time through the explosion-proof power-off mechanism, and when the pressure inside the capacitor is too high, it can be preferentially ruptured through the groove at the bottom of the sealed shell to release the internal pressure, and at the same time, it is protected by the shell to prevent the capacitor from exploding unpredictably. However, the bottom of the capacitor needs a violent explosion to rupture and release the pressure, and it is impossible to release the pressure caused by the increase in air expansion pressure caused by the heat generated during work, so that the sealed shell may expand, deform and rupture, affecting the service life and sealing performance, and the groove at the bottom of the capacitor cannot be restored after rupture. Utility Model Content

[0003] The utility model aims to solve the problem that the existing technology cannot release the increased air expansion pressure caused by the heat generated during operation, so that the sealed shell may expand, deform and rupture, affecting the service life and sealing performance, and the groove at the bottom of the capacitor cannot be restored after rupture, and proposes a fully sealed large-capacity capacitor.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A fully sealed large-capacity capacitor is designed, comprising an explosion-proof shell, a terminal, a bottom plate, and a capacitor core. The top of the bottom plate is fixedly provided with an explosion-proof shell and a capacitor core located in the explosion-proof shell. The interior of the explosion-proof shell is fixedly provided with an isolation plate located above the capacitor core and an explosion-proof membrane located above the isolation plate, and micropores are penetrated through the top of the isolation plate. An exhaust hole located above the explosion-proof membrane is provided on the rear end surface of the explosion-proof shell. A mounting hole is provided on the top of the explosion-proof shell, and a capacitor interface is fixedly provided in the mounting hole. A capacitor plug is inserted into the interior of the capacitor interface, and a terminal is fixedly provided on the top of the capacitor plug. The top outer wall of the capacitor plug is threadedly connected with a top plate, and the bottom of the top plate is fixedly connected with a push plate located in the explosion-proof shell and above the explosion-proof membrane through a connecting structure. An insulating base is fixedly provided at the bottom of the bottom plate, and the capacitor core is connected to the capacitor interface through a wire penetrating the isolation plate and the explosion-proof membrane.

[0006] Preferably, the connection structure comprises a sliding rod, a plurality of through holes are opened on the top of the explosion-proof shell, and the sliding rods are inserted into the through holes, and the top and bottom of the sliding rods are fixedly connected to the top plate and the push plate respectively.

[0007] Preferably, a threaded hole is formed through the bottom of the insulating base, and a screw is inserted into the threaded hole.

[0008] Preferably, the outer wall of the conductor is covered with a fire-resistant cloth coating.

[0009] Preferably, the explosion-proof membrane comprises a heat-insulating fire-resistant cloth and a high-temperature resistant rubber layer, the bottom of the high-temperature resistant rubber layer is a wave surface provided with protrusions, and the heat-insulating fire-resistant cloth is compounded on the wave surface.

[0010] Preferably, the insulating base is formed by integrally molding an insulating base plate and an intercepting fence.

[0011] Preferably, a fire-resistant layer is fixedly provided on the inner wall of the insulating base, and the fire-resistant layer is made of a metal film bonded to the inner wall of the insulating base.

[0012] The utility model proposes a fully sealed large-capacity capacitor, which has the beneficial effects that: the fully sealed large-capacity capacitor can alleviate the increase in air pressure caused by the heat generated by the operation of the capacitor core through the expansion of the explosion-proof membrane while maintaining the explosion sealing performance through the isolation plate and the explosion-proof membrane, effectively preventing deformation and cracking caused by the increase in pressure inside the explosion-proof shell, and the explosion-proof membrane can be restored for continuous use, and when a fault occurs and the temperature rises rapidly, not only can the explosion-proof membrane bulge violently to release the pressure and avoid explosion, but the explosion-proof membrane will bulge violently to push the push plate upwards and make the capacitor plug detach from the capacitor interface to disconnect the circuit; the capacitor plug and the push plate can be adjusted by rotating the top plate to adjust the temperature when the circuit is cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a fully sealed large-capacity capacitor proposed by the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of a fully sealed large-capacity capacitor proposed by the utility model;

[0015] Figure 3 This is a schematic diagram of the external structure of the wire of a fully sealed large-capacity capacitor proposed by the utility model;

[0016] Figure 4 This is a schematic diagram of the explosion-proof sealing membrane structure of a fully sealed large-capacity capacitor proposed by the utility model;

[0017] Figure 5The utility model is a schematic diagram of the fire-resistant layer structure of a fully sealed large-capacity capacitor.

[0018] In the figure: 1. Insulating base; 2. Bottom plate; 3. Explosion-proof shell; 4. Terminal; 5. Top plate; 6. Intercepting fence; 7. Insulating bottom plate; 8. Threaded hole; 9. Capacitor core; 10. Wire; 11. Exhaust hole; 12. Isolation plate; 13. Micropore; 14. Explosion-proof membrane; 15. Push plate; 16. Sliding rod; 17. Capacitor plug; 18. Capacitor interface; 19. Insulating fire-resistant cloth; 20. High-temperature resistant rubber layer; 21. Fire-resistant cloth covering layer; 22. Fire-resistant layer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-5 A fully sealed large-capacity capacitor comprises an explosion-proof shell 3, a terminal 4, a bottom plate 2, and a capacitor core 9. The top of the bottom plate 2 is fixedly provided with an explosion-proof shell 3 and the capacitor core 9 located in the explosion-proof shell 3. The interior of the explosion-proof shell 3 is fixedly provided with an isolation plate 12 located above the capacitor core 9 and an explosion-proof membrane 14 located above the isolation plate 12. A micro hole 13 is formed through the top of the isolation plate 12. An exhaust hole 11 located above the explosion-proof membrane 14 is formed on the rear end surface of the explosion-proof shell 3. The top of the explosion-proof shell 3 is provided with an installation hole 11. A hole is provided in the mounting hole, and a capacitor interface 18 is fixedly arranged in the mounting hole, a capacitor plug 17 is inserted in the interior of the capacitor interface 18, and a terminal 4 is fixedly arranged on the top of the capacitor plug 17, a top plate 5 is threadedly connected to the top outer wall of the capacitor plug 17, a push plate 15 located in the explosion-proof shell 3 and above the explosion-proof membrane 14 is fixedly connected to the bottom of the top plate 5 through a connecting structure, an insulating base 1 is fixedly arranged at the bottom of the bottom plate 2, and the capacitor core 9 is connected to the capacitor interface 18 through a wire 10 that passes through the isolation plate 12 and the explosion-proof membrane 14.

[0021] The connection structure includes a sliding rod 16. The top of the explosion-proof shell 3 is provided with a plurality of through holes, and the sliding rod 16 is inserted into the through holes. The top and bottom of the sliding rod 16 are fixedly connected to the top plate 5 and the push plate 15 respectively.

[0022] A threaded hole 8 is formed through the bottom of the insulating base 1 , and a screw is inserted into the threaded hole 8 .

[0023] The outer wall of the conductor 10 is covered with a fire-resistant cloth coating layer 21 .

[0024] The explosion-proof membrane 14 includes a heat-insulating fire-resistant cloth 19 and a high-temperature resistant rubber layer 20. The bottom of the high-temperature resistant rubber layer 20 is a wave surface with protrusions, and the heat-insulating fire-resistant cloth 19 is compounded on the wave surface.

[0025] The insulating base 1 is formed by an insulating bottom plate 7 and an intercepting fence 6 which are integrally formed.

[0026] A fire-resistant layer 22 is fixedly disposed on the inner wall of the insulating base 1 , and the fire-resistant layer 22 is made of a metal film bonded to the inner wall of the insulating base 1 .

[0027] Working principle: The heat generated by the capacitor core 9 will cause the air below the explosion-proof membrane 14 to expand due to the heat and enter the top of the isolation plate 12 through the micropores 13, so that the explosion-proof membrane 14 bulges upward, thereby avoiding the expansion, deformation and cracking of the explosion-proof shell 3 caused by the expansion of the internal air, and avoiding affecting the service life and sealing performance. When the capacitor core 9 heats up rapidly due to a fault, etc., causing a large increase in pressure, the explosion-proof membrane 14 will bulge violently, thereby releasing the pressure, and the violent bulging of the explosion-proof membrane 14 will push the push plate 15 upward and make the capacitor plug 17 disengage from the capacitor interface 18, disconnecting the circuit; the fragments split by the combustion are collected through the insulating base 1 and the refractory layer 22, so as to avoid the excessive temperature generated by the capacitor core 9 causing the explosion-proof shell 3 to melt and cause other components to catch fire.

[0028] The fully sealed large-capacity capacitor not only has explosion sealing performance through the isolation plate 12 and the explosion-proof membrane 14, but also alleviates the increase in air pressure caused by the heat generated by the operation of the capacitor core 9 through the expansion of the explosion-proof membrane 14, effectively preventing deformation and cracking caused by the increase in pressure inside the explosion-proof shell 3, and the explosion-proof membrane 14 can be restored for continuous use. In addition, when a fault occurs and the temperature rises rapidly, not only can the explosion-proof membrane 14 bulge violently to release the pressure and avoid explosion, but the violent bulging of the explosion-proof membrane 14 will push the push plate 15 upward and make the capacitor plug 17 disengage from the capacitor interface 18, thereby disconnecting the circuit; the capacitor plug 17 and the push plate 15 can be adjusted by rotating the top plate 5, thereby adjusting the temperature when the circuit is disconnected.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully sealed large-capacity capacitor, comprising an explosion-proof shell (3), a terminal (4), a bottom plate (2), and a capacitor core (9), characterized in that: The top of the bottom plate (2) is fixedly provided with an explosion-proof shell (3) and a capacitor core (9) located in the explosion-proof shell (3); the interior of the explosion-proof shell (3) is fixedly provided with an isolation plate (12) located above the capacitor core (9) and an explosion-proof membrane (14) located above the isolation plate (12); a micro hole (13) is provided through the top of the isolation plate (12); a vent hole (11) located above the explosion-proof membrane (14) is provided on the rear end surface of the explosion-proof shell (3); a mounting hole is provided on the top of the explosion-proof shell (3); a capacitor interface (18) is fixedly provided in the mounting hole; A capacitor plug (17) is inserted into the interior of the capacitor interface (18), and a wiring terminal (4) is fixedly arranged on the top of the capacitor plug (17). A top plate (5) is threadedly connected to the top outer wall of the capacitor plug (17). The bottom of the top plate (5) is fixedly connected to a push plate (15) located inside the explosion-proof shell (3) and above the explosion-proof membrane (14) through a connecting structure. An insulating base (1) is fixedly arranged on the bottom of the bottom plate (2). The capacitor core (9) is connected to the capacitor interface (18) through a wire (10) that passes through the isolation plate (12) and the explosion-proof membrane (14).

2. A fully sealed large-capacity capacitor according to claim 1, characterized in that: The connection structure comprises a sliding rod (16). The top of the explosion-proof shell (3) is provided with a plurality of through holes, and the sliding rods (16) are inserted into the through holes. The top and bottom of the sliding rod (16) are respectively fixedly connected to the top plate (5) and the push plate (15).

3. A fully sealed large-capacity capacitor according to claim 1, characterized in that: A threaded hole (8) is provided through the bottom of the insulating base (1), and a screw is inserted into the threaded hole (8).

4. A fully sealed large-capacity capacitor according to claim 1, characterized in that: The outer wall of the conductor (10) is sheathed with a fire-resistant cloth coating layer (21).

5. A fully sealed large-capacity capacitor according to claim 1, characterized in that: The explosion-proof membrane (14) comprises a heat-insulating fire-resistant cloth (19) and a high-temperature resistant rubber layer (20); the bottom of the high-temperature resistant rubber layer (20) is a wave surface provided with protrusions, and the heat-insulating fire-resistant cloth (19) is compounded on the wave surface.

6. A fully sealed large-capacity capacitor according to claim 1, characterized in that: The insulating base (1) is formed by integrally forming an insulating base plate (7) and an intercepting fence (6).

7. A fully sealed large-capacity capacitor according to claim 1, characterized in that: A fire-resistant layer (22) is fixedly provided on the inner wall of the insulating base (1), and the fire-resistant layer (22) is made of a metal film bonded to the inner wall of the insulating base (1).

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