CN114068179A

CN114068179A - Explosion-proof capacitor

Info

Publication number: CN114068179A
Application number: CN202111181781.5A
Authority: CN
Inventors: 朱文涛; 徐龙洋
Original assignee: Individual
Current assignee: Hunan Zhongda Electronic Technology Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-02-18
Anticipated expiration: 2041-10-11
Also published as: CN114068179B

Abstract

The invention relates to the technical field of power capacitors, in particular to an explosion-proof capacitor which comprises a capacitor body, an explosion-proof mechanism and an early warning facility, wherein the explosion-proof mechanism comprises a first round box with an opening at the top, a top cover is arranged in the first round box, two through holes are formed in the top cover, the capacitor body is connected with two wiring terminals after being connected in parallel, the wiring terminals penetrate through the corresponding through holes and are fixedly connected with the corresponding through holes, four springs which are arranged in a circular shape are fixedly mounted on the inner wall of the bottom of the first round box, and the top ends of the four springs are fixedly mounted with a second round box with an opening at the top. The bottom surface of first circle case and second circle case all is provided with the locating hole, constitute through crooked iron sheet between the capacitor body, iron sheet and stopper and pin contact are connected, pin and stopper can be outstanding the bottom of first circle case when receiving the extrusion.

Description

Explosion-proof capacitor

Technical Field

The invention relates to the technical field of power capacitors, in particular to an explosion-proof capacitor.

Background

The capacitor is a device for storing electric charge, and an insulating dielectric medium is sandwiched between two metal electrodes, and when a voltage is applied between the two metal electrodes, electric charge is stored on the electrodes, so that the capacitor is an energy storage element. The capacitor has a wide range of functions in a circuit, including coupling, filtering, resonance, integration, differentiation and the like, and the power capacitor is widely applied to various conditions of a factory power distribution system, a residential area power distribution system, a municipal commercial building, a traffic tunnel power distribution system, a box transformer, a complete cabinet, an outdoor power distribution box and the like.

However, when the capacitor is used for a long time or the external environment is changed drastically, the electrolytic capacitor is liable to malfunction, for example, the capacitor generates too high heat and vaporizes the electrolyte in the case when operating, so that the internal pressure of the capacitor case rises sharply, causing the case of the capacitor to expand and leak, even burst, and causing damage to surrounding components, and thus, an explosion-proof capacitor has been proposed.

Disclosure of Invention

The invention aims to solve the problem that explosion caused by pressure rise inside a capacitor caused by improper operation can damage surrounding components, and provides a novel explosion-proof capacitor for overcoming the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an explosion-proof capacitor comprises a capacitor body and an explosion-proof mechanism, wherein the explosion-proof mechanism comprises a first round box with an opening at the top, a top cover is arranged in the first round box, two through holes are formed in the top cover, four first springs which are circularly arranged are fixedly arranged on the inner wall of the bottom of the first round box, the top ends of the four first springs are fixedly provided with a second round box with an opening at the top, the top of the second round box is abutted against the bottom of the top cover, a plurality of circular grooves are regularly arranged at the bottom of the second round box, a capacitor body is arranged in each circular groove, the plurality of capacitor bodies are connected onto two wiring terminals in parallel, telescopic plates are in contact connection around the capacitor bodies, the telescopic plates divide the plurality of capacitor bodies, a first positioning hole and a second positioning hole are formed in the positions, corresponding to each telescopic plate, of the bottoms of the second round box and the first round box, first locating hole and the second locating hole sliding connection that first circle case and the round case of second correspond the position have the pin, the pin is close to the one end fixedly connected with stopper of expansion plate, the pin is equipped with the second spring at stopper to one section cover of the round case bottom surface of second, the stopper is connected with the expansion plate contact, set up a plurality of first through-holes that are the annular and arrange on the inner wall of the round case of second, set up a plurality of second through-holes that are the annular and arrange on the inner wall of first circle case, buffer gear is installed to the internal rotation of first circle case, and most buffer gear rotates the cover and establishes on the round case of second, buffer gear includes a plurality of bumping posts and two holders that are circular range, and a plurality of buffer gear run through two holders and rotate with two holders and link together.

Preferably, the inner wall of the first round box is provided with a first annular groove, and the outer wall of the top cover and the inner wall of the first annular groove are in interference fit together.

Preferably, a second annular groove is formed in the bottom of the top cover, and the top of the second round box is in interference fit with the inner wall of the second annular groove.

Preferably, the first through hole and the second through hole are conical from inside to outside.

Preferably, the buffer column comprises a circular tube layer and a corrugated tube layer, wherein the circular tube layer and the corrugated tube layer are arranged alternately and are in contact connection.

Preferably, the first round box and the second round box are both made of high manganese steel.

Preferably, a plurality of circularly arranged ash discharge holes are formed in the top cover.

Preferably, the expansion plate is formed by combining two elastic bent iron sheets.

Preferably, the pin is in the state that the condenser is normally installed, and the lower extreme flushes with the outer wall bottom surface of first circle case, the pin is in the condition that only receives the elasticity of second spring and does not receive the pressure of condenser body, and the lower extreme flushes with the inner wall bottom surface of first circle case.

Preferably, the inside of expansion plate is provided with the dry powder package of putting out a fire, the dry powder package of putting out a fire is made by elastic plastic parcel dry powder.

Compared with the prior art, the invention has the beneficial effects that:

1. when the capacitor body explodes due to faults, the second round box made of high manganese steel cannot be damaged by explosion shock waves, and meanwhile, the shock waves are discharged through the first through hole and the second through hole; under the action of the buffer mechanism, the vibration of the second round box caused by shock waves cannot be directly transmitted to the first round box, so that the first round box cannot shake and damage surrounding components caused by shock; shock wave promotes the expansion bracket and makes the dry powder package receive violent impact for inside the dry powder package splashes the cage explosion-proof mechanism, prevent that the condenser explosion from producing the spark burning and the spark from stretching the burning and rising the temperature and destroying other components and parts around.

2. When capacitor body appears because of the trouble take place to expand and reveals, condenser inflation extrusion expansion bracket, the expansion bracket receives the extrusion to slowly straighten from the state of bending, extrudees the stopper for the stopper drives the pin and slowly follows the surperficial salient of first circle case, lets user of service can be easier discovery trouble and hidden danger, can change before the bigger harm of condenser explosion production.

The explosion-proof capacitor is simple to operate and convenient to use, can avoid severe shock waves generated when the capacitor body explodes, prevents the shell exploded by the capacitor body from splashing, and avoids the damage of the shock waves and the splashed shell to surrounding components.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a cross-sectional view of the explosion-proof mechanism of the present invention;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a cross-sectional view of the cage of the present invention;

FIG. 5 is a cross-sectional view of a bumper post according to the present invention;

FIG. 6 is a cross-sectional elevation view of the explosion vent mechanism of the present invention;

FIG. 7 is a top view of the capacitor body and the expansion bracket of the present invention;

FIG. 8 is a partial view of the capacitor body and the expansion bracket in the working state of the present invention.

In the figure: the capacitor comprises a capacitor body 1, a wiring terminal 11, an explosion-proof mechanism 2, a first round box 21, a first through hole 211, a first annular groove 212, a first positioning hole 213, a top cover 22, a second annular groove 221, a through hole 222, a second round box 23, a second through hole 231, a second positioning hole 232, a round groove 233, a buffer mechanism 24, a retainer 241, a buffer column 242, a round pipe layer 243, a corrugated pipe layer 244, a first spring 25, a telescopic plate 31, a pin 32, a limiting block 33, a second spring 34 and a dry powder bag 35.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution:

the utility model provides an explosion-proof capacitor, including capacitor body 1 and explosion-proof mechanism 2, explosion-proof mechanism 2 includes that the top is open-ended first circle case 21, be equipped with top cap 22 in the first circle case 21, be equipped with two through holes 222 on the top cap 22, fixed mounting has four first springs 25 that are circular range on the bottom inner wall of first circle case 21, four first spring 25's top fixed mounting has same top to be open-ended second circle case 23, the top of second circle case 23 is contradicted together with top cap 22's bottom, a plurality of circular recess 233 is arranged to second circle case 23 bottom rule, place a capacitor body 1 in each circular recess 233, a plurality of capacitor body 1 parallel connection is on two binding post 11, the contact is connected with expansion plate 31 around capacitor body 1, expansion plate 31 cuts apart a plurality of capacitor body 1, second circle case 23 and the position that the bottom of first circle case 21 corresponds each expansion plate 31 all are provided with first locating hole 213 and second location The locating hole 232, first locating hole 213 and the second locating hole 232 sliding connection that first circle case 21 and second circle case 23 correspond the position have the pin, the pin is close to the one end fixedly connected with stopper 33 of expansion plate 31, the pin is equipped with second spring 25 at stopper 33 to one section cover of second circle case 23 bottom surface, stopper 33 and expansion plate 31 contact are connected, set up a plurality of first through-holes 211 that are the annular range on the inner wall of second circle case 23, set up a plurality of second through-holes 231 that are the annular range on the inner wall of first circle case 21, buffer gear 24 is installed to first circle case 21 rotation, most buffer gear 24 rotation cover is established on second circle case 23, buffer gear 24 includes a plurality of buffer posts 242 and two holders 241 that are the circular range, a plurality of buffer gear 24 run through two holders 241 and rotate with two holders 241 and link together.

In this embodiment, the inner wall of the first round box 21 is provided with a first annular groove 211, and the outer wall of the top cover 22 and the inner wall of the first annular groove 212 are in interference fit together.

The bottom of the top cover 22 is provided with a second annular groove 221, and the top of the second round box 23 is in interference fit with the inner wall of the second annular groove 221.

The first through-hole 211 and the second through-hole 231 are conical in shape from the inside to the outside.

The buffer column 242 includes circular tube layers 243 and corrugated tube layers 244, and the circular tube layers 243 and the corrugated tube layers 244 are alternately arranged and contact-connected.

The first round box 21 and the second round box 23 are both made of high manganese steel.

The top cover 22 is provided with a plurality of circularly arranged ash discharge holes.

Specifically, when capacitor body 1 explodes, first round box 21 and second round box 23's material is high manganese steel, therefore intensity is higher, the shock wave can not cause the damage to the inside of second round box 23, the shock wave that produces simultaneously passes through second through-hole 231 on second round box 23 and transmits in first round box 21, later the shock wave rethread first through-hole 211 of first round box 21 discharges, through designing into the shape of first through-hole 211 and second through-hole 231 conical, pressure diminishes when making the high-pressure gas blowout of explosion production, through set up buffer 24 between first round box 21 and second round box 23, make second round box 23 can not directly transmit for first round box 21 because of the vibrations that the shock wave produced, make the vibration of first round box 21 reduce greatly, thereby can not cause the damage to components and parts on every side.

In this embodiment, the expansion plate 31 is formed by combining two pieces of elastically bent iron.

The pin 32 has a lower end flush with the bottom surface of the outer wall of the first round case 21 in a state where the capacitor is normally mounted, and the pin 32 has a lower end flush with the bottom surface of the inner wall of the first round case 21 only under the condition that the pin is not under the pressure of the capacitor body 1 by the elastic force of the second spring 25.

Specifically, when capacitor body 1 takes place to reveal and expand because of the trouble, capacitor body 1 volume increases, extrude expansion plate 31 on every side, make expansion plate 31 slowly straighten by the bending state, the length of expansion plate 31 can grow gradually when straightening, expansion plate 31 extrudes stopper 33, make stopper 33 drive pin 32 and stretch out from the bottom of first round box 21, when staff discovers the pin 32 that comes, timely to damage or the capacitor body 1 change that has had the explosion hidden danger, avoid capacitor body 1 to cause bigger damage.

In this embodiment, the inside of the expansion plate 31 is provided with a fire extinguishing dry powder bag 35, and the fire extinguishing dry powder bag 35 is made of elastic plastic wrapping dry powder.

Specifically, when capacitor body 1 explodes because of the trouble, the spark that the explosion produced occasionally can arouse the conflagration, through be provided with dry powder package 35 in the centre of expansion plate 31 for dry powder package 35 breaks when receiving violent impact, and the dry powder splashes, is full of the inside of explosion-proof mechanism 2, prevents the emergence of conflagration and spreads and cause the damage to components and parts on every side.

The working principle is as follows: when the capacitor body 1 explodes due to failure, the first round box 21 and the second round box 23 are made of high manganese steel, so that the strength is high, so that the shock wave of the explosion does not cause damage to the second round case 23, and the shock wave is transmitted into the first round case 21 through the plurality of second through holes 231 of the second round case 23, and then discharged through the plurality of first through holes 211 of the first round case 21, since the first through hole 211 and the second through hole 231 are both shaped like a cone, the pressure will be reduced when the high pressure shock wave generated by explosion is ejected, thereby not causing damage to the components or the users around the capacitor body 1, and simultaneously, under the action of the buffer mechanism 24, the vibration of the second round box 23 caused by the shock wave is not directly transmitted to the first round box 21, so that the first round box 21 does not shake due to impact and damage surrounding components. Shock wave promotes expansion bracket 31 and makes expansion bracket 31 extrusion destroy the exocuticle of dry powder package 35 for inside dry powder package 35 splashes cage cover explosion-proof mechanism 2, prevents that the spark that the explosion of capacitor body 1 produced from causing the conflagration, spark spread the burning and heat up and destroy other components and parts on every side.

When capacitor body 1 appeared because of the trouble take place the inflation and reveal, capacitor body 1 inflation extrusion expansion bracket 31, expansion bracket 31 receives the extrusion to stretch out slowly from the state of bending, extrudees stopper 33 for stopper 33 drives pin 32 and slowly follows the bottom surface of first round box 21 outstanding, lets discovery trouble and hidden danger that the user of service can be easier, can change before capacitor body 1 explosion produces bigger harm.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an explosion-proof capacitor, includes capacitor body (1) and explosion-proof mechanism (2), its characterized in that: the explosion-proof mechanism (2) comprises a first round box (21) with an open top, a top cover (22) is arranged in the first round box (21), two through holes (222) are formed in the top cover (22), four first springs (25) which are circularly arranged are fixedly mounted on the inner wall of the bottom of the first round box (21), a second round box (23) with an open top is fixedly mounted at the top ends of the four first springs (25), the top of the second round box (23) is abutted against the bottom of the top cover (22), a plurality of circular grooves (233) are regularly arranged at the bottom of the second round box (23), one capacitor body (1) is placed in each circular groove (233), the plurality of capacitor bodies (1) are connected to the two wiring terminals (11) in parallel, and the periphery of the capacitor bodies (1) is in contact connection with a telescopic plate (31), the capacitor comprises a plurality of capacitor bodies (1) and is characterized in that the telescopic plate (31) divides the capacitor bodies (1), the bottoms of a second round box (23) and a first round box (21) are provided with a first positioning hole (213) and a second positioning hole (232) corresponding to each telescopic plate (31), the first positioning hole (213) and the second positioning hole (232) of the corresponding positions of the first round box (21) and the second round box (23) are connected with pins in a sliding manner, one end of each pin close to the telescopic plate (31) is fixedly connected with a limiting block (33), a second spring (25) is sleeved on one section of each pin from the limiting block (33) to the bottom surface of the second round box (23), the limiting block (33) is connected with the telescopic plate (31) in a contact manner, a plurality of first through holes (211) which are arranged in an annular manner are formed in the inner wall of the second round box (23), a plurality of second through holes (231) which are arranged in an annular manner are formed in the inner wall of the first round box (21), buffer gear (24) are installed in first circle case (21) internal rotation, and most buffer gear (24) rotate to overlap and establish on second circle case (23), buffer gear (24) include a plurality of buffering post (242) and two holders (241) that are circular arrangement, and a plurality of buffer gear (24) run through two holders (241) and rotate with two holders (241) and link together.

2. An explosion-proof capacitor as set forth in claim 1, wherein: be provided with first ring channel (211) on the inner wall of first round case (21), the outer wall of top cap (22) and the inner wall interference fit of first ring channel (211) are in the same place.

3. An explosion-proof capacitor as set forth in claim 1, wherein: and a second annular groove (221) is formed in the bottom of the top cover (22), and the top of the second round box (23) is in interference fit with the inner wall of the second annular groove (221).

4. An explosion-proof capacitor as set forth in claim 1, wherein: the shapes of the first through hole (211) and the second through hole (231) are conical from inside to outside.

5. An explosion-proof capacitor as set forth in claim 1, wherein: the buffer column (242) comprises a circular tube layer (243) and a corrugated tube layer (244), wherein the circular tube layer (243) and the corrugated tube layer (244) are alternately arranged and are in contact connection.

6. An explosion-proof capacitor as set forth in claim 1, wherein: the first round box (21) and the second round box (23) are both made of high manganese steel.

7. An explosion-proof capacitor as set forth in claim 1, wherein: the top cover (22) is provided with a plurality of circularly arranged ash discharge holes.

8. An explosion-proof capacitor as set forth in claim 1, wherein: the expansion plate (31) is formed by combining two elastic bent iron sheets.

9. An explosion-proof capacitor as set forth in claim 1, wherein: the lower extreme flushes with the outer wall bottom surface of first circle case (21) pin (32) under the state of condenser normal installation, pin (32) are just receiving under the circumstances that the elasticity of second spring (25) is not received the pressure of capacitor body (1), and the lower extreme flushes with the inner wall bottom surface of first circle case (21).

10. An explosion-proof capacitor as set forth in claim 1, wherein: the fire extinguishing dry powder bag (35) is arranged inside the expansion plate (31), and the fire extinguishing dry powder bag (35) is made of elastic plastic wrapped dry powder.