An insulating explosion-proof block for capacitors

Abstract

This utility model discloses an insulating explosion-proof block for capacitors, relating to the field of capacitor technology. It includes an integrally molded main body with an obliquely oriented venting assembly on its side. The venting assembly has a detachable intercepting grille at its inlet. A weak ring is located at the center of the main body, with annular conductive ink coated on its inner side. The intercepting grille is fastened to the inner wall of the venting assembly via a slot. A small amount of gas is released after passing through the obliquely oriented venting holes on the side and filtering solder beads through the intercepting grille, preventing pressure accumulation. When the internal pressure suddenly increases, the central weak ring breaks first to quickly relieve pressure, and simultaneously, the inner annular conductive ink breaks, triggering the external circuit to disconnect, forming a dual mechanism of physical pressure relief and circuit protection. A bottom elastic clip, elastic claws, and a top positioning boss ensure the explosion-proof block is securely installed, preventing vibration and displacement from affecting the explosion-proof effect, thus comprehensively improving the operational safety of the capacitor.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to an insulating explosion-proof block for capacitors. Background Technology

[0002] Explosion-proof insulating blocks for capacitors are components that protect capacitors, prevent leakage, release pressure in time to avoid explosion when the internal pressure is too high, and also block debris such as solder balls, ensuring the safe operation of the capacitor.

[0003] However, existing capacitor explosion-proof blocks have many defects: the vent design is simple and there is no effective interception structure. During the soldering process, solder balls can easily adhere to the inside through the vent, causing insulation failure or even short circuit; the grid is mostly a fixed structure, which is difficult to disassemble and clean after blockage, affecting gas flow; there is a lack of precise control over the weak link that breaks, and uneven force during explosion-proofing leads to delayed response. In addition, there is no synchronous circuit protection mechanism, which cannot cut off the circuit at the same time as depressurization, resulting in significant safety hazards. Therefore, an insulating explosion-proof block for capacitors is needed. Utility Model Content

[0004] The purpose of this invention is to provide an insulating explosion-proof block for capacitors, which solves the problems of the exhaust hole being unable to intercept solder balls, the grid being inconvenient to clean, and the protective capability being weak in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an insulating explosion-proof block for capacitors, comprising an integrally formed main body, an oblique exhaust assembly on the side of the main body, a detachable interception grille at the inlet of the exhaust assembly, a weak ring at the center of the main body, an annular conductive ink coated on the inner side of the weak ring, and the interception grille being fastened to the inner wall of the exhaust assembly via a slot.

[0006] Preferably, the exhaust components are evenly distributed circumferentially, and the exhaust components are obliquely arranged to the side of the main body.

[0007] Preferably, the weak ring is a thin-walled annular structure in the central region of the body.

[0008] Preferably, the bottom of the main body is provided with elastic claws, which are distributed along the circumference of the main body, and the top of the main body is also provided with positioning bosses.

[0009] Preferably, the intercepting grid includes an embedded ring, barbs, and rubber blocks. The inner wall of the embedded ring is provided with barbs distributed in a ring, and at least one pair of rubber blocks are provided on the periphery of the embedded ring.

[0010] Preferably, the barbs are disposed at a 45° angle on the inner wall of the embedded ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By using an angled exhaust assembly in conjunction with a detachable barbed grille, it can effectively intercept solder balls to prevent short circuits and is easy to disassemble and clean, solving the problem of traditional grilles being clogged and difficult to maintain. The central weak ring achieves precise directional breakage, which, together with the inner ring conductive ink, synchronously triggers the circuit to disconnect, making the explosion-proof response faster. This forms a dual safety mechanism of physical pressure relief and circuit protection. The overall structural design takes into account insulation, explosion protection, and assembly stability, significantly improving the operational safety and service life of the capacitor. Attached Figure Description

[0013] Figure 1 This is a top view of the overall structure of the product of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall front view of the product of this utility model;

[0015] Figure 3 This is a schematic diagram of the interception grille structure of the product of this utility model;

[0016] Figure 4 This is a schematic diagram of the weak ring structure of the product of this utility model;

[0017] Figure 5 This is a schematic diagram of the elastic claw structure of the product of this utility model;

[0018] Figure 6 This is a schematic diagram of the exhaust assembly structure of the product of this utility model.

[0019] In the diagram: 1. Main body; 2. Exhaust assembly; 21. Exhaust hole; 22. Slot; 3. Interception grille; 31. Embedded ring; 32. Barb; 33. Rubber block; 4. Weak ring; 5. Conductive ink; 6. Elastic claw; 61. Claw body; 62. Anti-slip texture; 7. Positioning boss. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model relates to an insulating explosion-proof block for capacitors, such as... Figure 1-6As shown, it includes a main body 1, which is integrally molded using modified flame-retardant PPO through injection molding. It is a horizontally placed circular plate structure with a diameter that matches the opening of the capacitor shell. The integrally molded PPO structure avoids weak points in insulation caused by splicing gaps, effectively prevents static electricity accumulation, and solves the leakage risk of traditional metal explosion-proof blocks.

[0022] Furthermore, an exhaust assembly 2 is provided on the periphery of the main body 1. The exhaust assembly 2 includes an exhaust hole 21 and a slot 22. A set of opposing slots 22 are provided on the inner wall of the exhaust hole 21. The exhaust assembly 2 is evenly distributed along the circumferential direction of the side of the main body 1. The axial direction of the exhaust hole 21 is at a 30° angle to the radial direction of the main body 1. It is an integral injection molded structure with the main body 1. The inner wall of the exhaust hole 21 is smooth and burr-free, which reduces dust accumulation on the cover plate caused by gas impact. The even distribution in the circumferential direction ensures balanced pressure release and avoids vibration caused by excessive local airflow.

[0023] Furthermore, the exhaust assembly 2 is detachably equipped with an intercepting grille 3. The intercepting grille 3 includes an embedded ring 31, barbs 32, and a rubber block 33. The inner wall of the embedded ring 31 is fixedly connected with barbs 32. The outer diameter of the embedded ring 31 is adapted to the inner diameter of the inlet end of the exhaust assembly 2. The barbs 32 are distributed in a ring at a 45° angle on the inner wall of the embedded ring 31. The outer wall of the embedded ring 31 is provided with a rubber block 33 that is adapted to the slot 22. The rubber block 33 is made of soft rubber and can be manually pushed out from the other side.

[0024] Furthermore, a weak ring 4 is provided at the center of the main body 1. The weak ring 4 is an annular recessed structure in the central area of ​​the main body 1, which is integrally formed with the main body 1. Its inner sidewall is smoothly connected to the upper and lower surfaces of the main body 1 without obvious seams, thus avoiding shell deformation caused by excessive local pressure.

[0025] Furthermore, the inner wall of the weak ring 4 is coated with conductive ink 5. The conductive ink 5 is uniformly coated on the inner wall of the weak ring 4 by screen printing process to form a closed ring circuit, which is tightly bonded to the inner wall of the weak ring 4 by resin adhesive.

[0026] Furthermore, the bottom of the main body 1 is provided with an elastic claw 6. The elastic claw 6 includes a claw body 61 and anti-slip texture 62. The end of the claw body 61 is inclined outward at 10°. The inner side wall of the claw body 61 is provided with a sawtooth-shaped raised structure anti-slip texture 62, which can form an interference fit with the annular groove of the capacitor shell. The sawtooth anti-slip texture 62 increases the static friction force and solves the loosening risk of traditional bolt fixing.

[0027] Furthermore, the upper surface of the main body 1 is also provided with a positioning boss 7. The positioning boss 7 is a cylindrical protrusion at the top center of the main body 1, which is integrally formed with the main body 1. Its outer diameter is in clearance fit with the inner diameter of the positioning hole of the capacitor cover plate. The clearance fit with the cover plate restricts the radial displacement of the main body 1, ensuring that the weak ring 4 is accurately aligned with the explosion-proof area of ​​the cover plate, and avoiding explosion-proof failure due to misalignment.

[0028] In practical use: after the tin beads are filtered through the side oblique exhaust port 21 and the intercepting grid 3, a small amount of gas is released to avoid pressure accumulation. When the internal pressure rises suddenly, the central weak ring 4 breaks first to quickly relieve pressure. At the same time, the inner ring conductive ink 5 breaks, triggering the external circuit to disconnect, forming a dual mechanism of physical pressure relief and circuit protection. The bottom elastic clip, elastic claw 6 and the top positioning boss 7 ensure that the explosion-proof block is installed firmly and avoid vibration displacement that affects the explosion-proof effect, thus comprehensively improving the safety of capacitor operation.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulating explosion-proof block for capacitors, characterized in that: The device includes an integrally formed main body (1), with an oblique exhaust assembly (2) on the side of the main body (1), a detachable interception grille (3) at the inlet of the exhaust assembly (2), a weak ring (4) at the center of the main body (1), and an annular conductive ink (5) coated on the inner side of the weak ring (4). The interception grille (3) is fastened to the inner wall of the exhaust assembly (2) through a slot (22).

2. The insulating explosion-proof block for capacitors according to claim 1, characterized in that: The exhaust components (2) are evenly distributed circumferentially, and the exhaust components (2) are obliquely arranged to the side of the main body (1).

3. The insulating explosion-proof block for capacitors according to claim 1, characterized in that: The weak ring (4) is a ring-shaped thin-walled structure in the central region of the body.

4. The insulating explosion-proof block for capacitors according to claim 1, characterized in that: The bottom of the main body (1) is provided with elastic claws (6), which are distributed around the circumference of the main body (1). The top of the main body (1) is also provided with positioning bosses (7).

5. The insulating explosion-proof block for capacitors according to claim 1, characterized in that: The intercepting grid (3) includes an embedded ring (31), barbs (32) and rubber blocks (33). The inner wall of the embedded ring (31) is provided with barbs (32) distributed in a ring, and at least one pair of rubber blocks (33) are provided on the periphery of the embedded ring (31).

6. The insulating explosion-proof block for capacitors according to claim 5, characterized in that: The barbs (32) are set at a 45° angle on the inner wall of the embedded ring (31).

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