CN-224232518-U - Capacitor with multiple protection function explosion-proof structure

CN224232518UCN 224232518 UCN224232518 UCN 224232518UCN-224232518-U

Abstract

The utility model discloses a capacitor with a multiple protection function explosion-proof structure, 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, the cover plate is covered at an opening of the shell and is positioned at the upper part of 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 riveted on the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet. The explosion-proof block is further provided with elastic components corresponding to the electric connection components in number, the elastic components comprise elastic pieces and positioning blocks, the second metal sheets are arranged at the bottoms of the positioning blocks, the other ends of the conducting rods sequentially penetrate through the elastic pieces, the positioning blocks and the second metal sheets to be welded to form explosion-proof welding spots, and at the moment, the positioning blocks compress the elastic pieces to store elastic potential energy. Therefore, in the non-explosion state, when the explosion-proof welding spot is abnormal and is in a similar state of breaking and non-breaking, the elastic piece can release elasticity and drive the second metal sheet to be rapidly separated from the conducting rod through the positioning block, so that the phenomena of discharging, arcing and the like of the conducting rod and the welding spot of the second metal sheet are prevented, and multiple protection effects are further achieved.

Inventors

CHEN RONG
SHEN JIAHAI
Pan Guiqiao

Assignees

胜业电气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250521

Claims (10)

1. A capacitor having a multiple protection function explosion-proof structure, comprising: an explosion-proof block for being disposed inside the case of the capacitor; The cover plate is used for covering the opening of the shell and is positioned at the upper part of 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 which penetrates through the cover plate and the explosion-proof block respectively, one end of the conductive rod is connected to the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet; The explosion-proof block is further provided with elastic components corresponding to the electric connection components in number, the elastic components comprise elastic pieces and positioning blocks, the second metal sheets are mounted at the bottoms of the positioning blocks, the other ends of the conducting rods sequentially penetrate through the elastic pieces, the positioning blocks and the second metal sheets to be welded to form explosion-proof welding spots, and at the moment, the positioning blocks compress the elastic pieces to store elastic potential energy.
2. The capacitor of claim 1, wherein grooves corresponding to the elastic components are formed in the bottoms of the explosion-proof blocks, the elastic components are placed in the grooves, the upper ends of the elastic components are abutted against the top wall of the grooves, the lower ends of the elastic components are abutted against the tops of the positioning blocks, and the positioning blocks can move up and down in the grooves.
3. The capacitor of claim 1, wherein a welding hole welded with the conductive 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.
4. The capacitor of claim 3, wherein two ends of the second metal sheet are riveted and fixed at the bottom of the positioning block through rivets, or two ends of the second metal sheet are provided with limiting holes, the bottom of the positioning block is convexly provided with limiting columns which are in clamping fit with the limiting holes, and the second metal sheet is in clamping fit with the limiting columns through the limiting holes so as to realize limiting fixation.
5. The capacitor of any one of claims 1-4, further comprising an insulating sleeve secured to the bottom of the explosion proof block and positioned below the second metal sheet, the insulating sleeve separating the explosion proof weld from the capacitor core.
6. The capacitor of any one of claims 1-4, wherein a mounting seat is further provided on a side of the cover plate facing away from the explosion proof block, and the first metal sheet is mounted on the mounting seat.
7. The capacitor of claim 6, wherein the mounting base comprises a mounting base body and a top cover covering the mounting base body, and a mounting groove for mounting the first metal sheet is formed in the top of the mounting base body.
8. The capacitor of claim 7, wherein a riveting base is further provided on a face of the cover plate facing the explosion proof block, and the first metal sheet, the mounting base body, the cover plate and the riveting base are integrally riveted by rivets.
9. The capacitor of claim 8, further comprising a blind rivet passing through the first metal sheet, the mounting base, the cover plate and the rivet base in this order from top to bottom and having an upper end rivet-fixed to the first metal sheet and a lower end rivet-fixed to the rivet base; the conductive rod is disposed through the blind rivet.
10. The capacitor of claim 8, wherein the conductive rod is a solid rivet, a limiting boss is annularly arranged on the outer side wall of the solid rivet, the solid rivet sequentially penetrates through the riveting base, the cover plate, the mounting base body and the first metal sheet from bottom to top, the upper end of the solid rivet is riveted and fixed on the first metal sheet, and the limiting boss abuts against the riveting base.

Description

Capacitor with multiple protection function explosion-proof structure Technical Field The utility model relates to the technical field of explosion protection of capacitors, in particular to a capacitor with an explosion protection structure with multiple protection functions. 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 rivet and the welding point of the metal sheet are broken, the inside of the capacitor is opened, and the explosion-proof effect is achieved. Therefore, during normal operation of the product (i.e. in a non-explosion-proof state), the cover plate will not bulge, and therefore the explosion-proof welding spots will not be pulled apart. At this time, if the explosion-proof welding spot of the product is abnormal, namely in a state similar to a broken state, the explosion-proof welding spot can discharge and arc, and huge energy generated by discharging and arc can easily fry the cover plate open, so that the risk is higher. Disclosure of utility model In order to overcome the defects in the prior art, the utility model provides the capacitor with the multiple protection function explosion-proof structure, and the elastic component is arranged on the explosion-proof block, so that when an explosion-proof welding spot is abnormal and is in a similar and non-breaking state, the elastic component can release elastic force, and the second metal sheet is driven by the positioning block to be rapidly separated from the conducting rod, so that the phenomena of discharging, arcing and the like of the welding spot of the conducting rod and the second metal sheet are prevented, and the product is effectively protected. The utility model adopts the technical proposal for solving the problems that: A capacitor having a multiple protection function explosion-proof structure, comprising: an explosion-proof block for being disposed inside the case of the capacitor; The cover plate is used for covering the opening of the shell and is positioned at the upper part of 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 which penetrates through the cover plate and the explosion-proof block respectively, one end of the conductive rod is connected to the first metal sheet, and the other end of the conductive rod is welded and fixed with the second metal sheet; The explosion-proof block is further provided with elastic components corresponding to the electric connection components in number, the elastic components comprise elastic pieces and positioning blocks, the second metal sheets are mounted at the bottoms of the positioning blocks, the other ends of the conducting rods sequentially penetrate through the elastic pieces, the positioning blocks and the second metal sheets to be welded to form explosion-proof welding spots, and at the moment, the positioning blocks compress the elastic pieces to store elastic potential energy. Further, grooves corresponding to the elastic components in number are formed in the bottoms of the explosion-proof blocks, the elastic components are placed in the grooves, the upper ends of the elastic components are abutted against the top wall of the grooves, the lower ends of the elastic components are abutted against the tops of the positioning blocks, and the positioning blocks can move up and down in the grooves. Further, a welding hole welded 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, two ends of the second metal sheet are fixed at the bottom of the positioning block through rivet rivet