CN-224217360-U - Explosion-proof capacitor with insulation protection function

CN224217360UCN 224217360 UCN224217360 UCN 224217360UCN-224217360-U

Abstract

The utility model discloses an explosion-proof capacitor with insulation protection, which comprises an explosion-proof block, a cover plate and an electric connection assembly, wherein the explosion-proof block is arranged in a shell of the capacitor, a cover plate sealing cover is arranged at an opening of the shell of the capacitor and is positioned above the explosion-proof block, the electric connection assembly comprises a first metal sheet arranged on the cover plate, a second metal sheet arranged on the explosion-proof block and a conductive rod respectively penetrating through the cover plate and the explosion-proof block, one end of the conductive rod is welded and fixed with the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet to form an explosion-proof welding spot. Wherein, still include setting up in the explosion proof piece bottom and lie in the insulating piece of second sheetmetal below, this insulating piece is used for separating explosion proof solder joint and condenser core. In addition, the insulating block can also block high temperature from the explosion-proof welding spot to the core and prevent physical impact of the second metal sheet from affecting the core, thereby playing roles of thermal isolation and mechanical isolation.

Inventors

CHEN RONG
SHEN JIAHAI
Pan Guiqiao

Assignees

胜业电气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250521

Claims (10)

1. An explosion-proof capacitor with insulation protection, comprising: an explosion proof block for mounting within the housing of the capacitor; the cover plate is used for sealing the cover plate and is arranged at the opening of the shell of the capacitor, and the cover plate is positioned above the explosion-proof block; The electric connection assembly comprises a first metal sheet arranged on the cover plate, a second metal sheet arranged on the explosion-proof block and a conductive rod penetrating through the cover plate and the explosion-proof block respectively, one end of the conductive rod is welded and fixed with the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet to form an explosion-proof welding spot; The explosion-proof welding device further comprises an insulating block arranged at the bottom of the explosion-proof block and located below the second metal sheet, and the insulating block is used for separating the explosion-proof welding spots from the capacitor core.
2. The explosion-proof capacitor with insulation protection according to claim 1, wherein the insulation block and the explosion-proof block are fixed by a riveting structure, a screw structure or a hot melting mode.
3. The explosion-proof capacitor with insulation protection according to claim 1 or 2, wherein an elastic component corresponding to the electric connection component is further arranged on the explosion-proof block, the elastic component comprises an elastic piece and a positioning block which are arranged up and down, the second metal sheet is installed at the bottom of the positioning block, the other end of the conductive rod sequentially penetrates through the explosion-proof block, the elastic piece and the positioning block and is welded with the second metal sheet to form the explosion-proof welding spot, and the positioning block compresses the elastic piece to store elastic potential energy.
4. The explosion-proof capacitor with insulation protection according to claim 3, wherein a welding hole welded and fixed with the conducting rod is formed in the middle of the second metal sheet, and two ends of the second metal sheet are limited and fixed at the bottom of the positioning block.
5. The explosion-proof capacitor with insulation protection according to claim 4, wherein limiting holes are formed in two ends of the second metal sheet, limiting columns matched with the limiting holes in a clamping mode are arranged at the bottoms of the positioning blocks in a protruding mode, and the second metal sheet is matched with the limiting columns in a clamping mode through the limiting holes in a clamping mode to achieve limiting fixation.
6. The explosion-proof capacitor with insulation protection according to claim 3, wherein the explosion-proof block is provided with a groove with an opening at the bottom, the elastic component is arranged in the groove, wherein: The elastic piece is an elastic ring, the upper end of the elastic ring is abutted with the top wall of the groove, and the lower end of the elastic ring is abutted with the top of the positioning block; The periphery of the positioning block is limited by the groove, and the positioning block can move up and down under the guiding action of the groove.
7. The explosion-proof capacitor with insulation protection according to claim 6, wherein two first side plates are arranged at intervals along the front-back direction at the bottom of the explosion-proof block, two second side plates are arranged at intervals along the left-right direction at the bottom of the explosion-proof block, and the grooves are formed by enclosing the two first side plates and the two second side plates; The front outer side wall and the rear outer side wall of the positioning block are respectively attached to the inner side walls of the two first side plates to achieve limiting, and the left outer side wall and the right outer side wall of the positioning block are respectively attached to the inner side walls of the two second side plates to achieve limiting.
8. The explosion-proof capacitor with insulation protection according to claim 1 or 2, wherein a mounting seat is further arranged on one surface of the cover plate, which is opposite to the explosion-proof block, the mounting seat comprises a mounting seat body and a top cover arranged on the mounting seat body in a covering manner, and a mounting groove for mounting the first metal sheet is formed in the top of the mounting seat body.
9. The explosion-proof capacitor with insulation protection according to claim 8, wherein a base is further arranged on one surface of the cover plate facing the explosion-proof block, and the first metal sheet, the mounting base body, the cover plate and the base are integrally connected through fasteners.
10. The explosion-proof capacitor with insulation protection according to claim 9, wherein the fastener is a hollow rivet, the hollow rivet sequentially penetrates through the first metal sheet, the mounting base body, the cover plate and the base from top to bottom, the upper end of the hollow rivet is riveted and fixed on the first metal sheet, the lower end of the hollow rivet is riveted and fixed on the base, and the conducting rod is arranged through the hollow rivet.

Description

Explosion-proof capacitor with insulation protection function Technical Field The utility model relates to the technical field of capacitors, in particular to an explosion-proof capacitor with insulation protection. Background This section provides only background information related to the present application so as to enable those skilled in the art to more thoroughly and accurately understand the present application, and is not necessarily prior art. When the existing capacitor works abnormally due to factors such as manufacturing process, working environment, poor ventilation and the like, excessive gas can be generated in the capacitor, and when the internal air pressure is too high, the capacitor bulges and explodes. The existing explosion-proof design is generally that an explosion-proof block is arranged on a capacitor, the explosion-proof block is positioned between an inner core of the capacitor and a cover plate, a leading-out terminal of the capacitor is assembled and fixed on a cover plate mounting seat through a rivet, and the other end of the rivet penetrates through the explosion-proof block and is welded and fixed with a metal sheet arranged on the explosion-proof block. Therefore, after the permanent breakdown of the core in the capacitor occurs, the generated gas and temperature can cause the pressure in the capacitor to rise, and the gas and temperature act on the cover plate which is easy to deform to enable the cover plate to bulge upwards, so that the explosion-proof welding spots between the rivet and the metal sheet are broken, the inside of the capacitor is opened, and the explosion-proof effect is achieved. However, in the existing capacitor, since no insulation protection structure is arranged between the explosion-proof welding spot and the core inside the capacitor, the defects that short circuit is easily caused by accidental conduction between the explosion-proof welding spot and the core in the explosion-proof process, high temperature is easily transferred from the explosion-proof welding spot to the core in the explosion-proof process, and thermal runaway chain reaction is caused, and physical impact generated by the second metal sheet easily influences the core in the explosion-proof process are easily caused. Disclosure of utility model In order to overcome the defects in the prior art, the utility model provides an explosion-proof capacitor with insulation protection, wherein an insulation block is arranged at the bottom of the explosion-proof block, and can separate an explosion-proof welding spot from a capacitor core, so that the explosion-proof welding spot and the capacitor core are electrically isolated, and further an insulation protection effect is achieved. The utility model adopts the technical proposal for solving the problems that: An explosion-proof capacitor with insulation protection, comprising: an explosion proof block for mounting within the housing of the capacitor; the cover plate is used for sealing the cover plate and is arranged at the opening of the shell of the capacitor, and the cover plate is positioned above the explosion-proof block; The electric connection assembly comprises a first metal sheet arranged on the cover plate, a second metal sheet arranged on the explosion-proof block and a conductive rod penetrating through the cover plate and the explosion-proof block respectively, one end of the conductive rod is welded and fixed with the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet to form an explosion-proof welding spot; The explosion-proof welding device further comprises an insulating block arranged at the bottom of the explosion-proof block and located below the second metal sheet, and the insulating block is used for separating the explosion-proof welding spots from the capacitor core. Further, the insulating block and the explosion-proof block are fixed through a riveting structure, a screw structure or a hot melting mode. Further, an elastic component corresponding to the electric connection component is further arranged on the explosion-proof block, the elastic component comprises an elastic piece and a positioning block which are arranged up and down, the second metal sheet is installed at the bottom of the positioning block, the other end of the conductive rod sequentially penetrates through the explosion-proof block, the elastic piece and the positioning block and is welded with the second metal sheet to form an explosion-proof welding spot, and the positioning block compresses the elastic piece to store elastic potential energy. Further, a welding hole welded and fixed with the conducting rod is formed in the middle of the second metal sheet, and two ends of the second metal sheet are limited and fixed at the bottom of the positioning block. Further, limiting holes are formed in two ends of the second metal sheet, limiting columns matched with the limiting holes in a c