Explosion-proof structure for capacitor
By introducing a transparent window into the explosion-proof structure of the capacitor to display the movement status of the movable block, the problem of difficulty in identifying capacitor failures after leakage in the prior art is solved, and the safe operation and timely replacement of the capacitor are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-03-20
AI Technical Summary
Existing capacitor explosion-proof devices are difficult to visually identify whether gas has been generated after a leak, leading to potential safety hazards and making it impossible to replace deteriorated capacitors in a timely manner.
An explosion-proof structure was designed, which includes an elastic clamping block, a pressure relief pipe and a movable block. The movement status of the movable block is displayed through a transparent window to promptly indicate capacitor failure, and gas is discharged through the vent pipe when necessary to avoid internal pressure accumulation.
This technology enables clear identification of faults after capacitor leakage, ensuring safe operation, reducing potential safety risks, and improving the timeliness of capacitor identification and replacement by users.
Smart Images
Figure CN224020615U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the capacitor field especially relates to a kind of explosion-proof structure for capacitor. BACKGROUND
[0002] Capacitor is the energy storage element in common in electronic circuit, is widely used in various electronic equipment;However, in certain special circumstances, capacitor can explode, the main reasons of capacitor explosion include but are not limited to the following several aspects: overvoltage, overcurrent, polarity is reversed or aging and defect;
[0003] Before capacitor explosion, usually accompanied by gas generation, this is due to electrolyte thermal decomposition or internal chemical reaction anomaly leads to, in the prior art, to reduce the risk of capacitor explosion, often set up explosion-proof device on capacitor, for example, many electrolytic capacitors are equipped with gas release mechanism, for releasing gas when internal pressure is too high, prevent shell burst.
[0004] However, the existing gas release mechanism has certain limitation, when gas is released, gas release mechanism is usually restored to initial state.This recovery design can maintain the integrity of capacitor appearance although, but also lead to a problem: it is difficult for user to directly identify those capacitor that has generated gas through appearance, this can lead to potential hidden danger, because these capacitors, even if not immediately explode, its internal performance can have deteriorated, continue to use can cause greater safety problem, therefore, how to improve the design of existing explosion-proof device, so that capacitor can leave obvious mark after gas release, to help user to quickly identify and replace the capacitor with problem, become the technical problem to be solved urgently at present. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of explosion-proof structure for capacitor to solve above-mentioned problem, and specific technical solutions are as follows:
[0006] A kind of explosion-proof structure for capacitor, the inside of the explosion-proof structure is equipped with accommodating space for installing the capacitor, the inner wall of the explosion-proof structure is equipped with several annular equidistant distribution elastic clamping blocks, several the elastic clamping blocks are used to clamp the capacitor to make the end surface of the capacitor and the inner wall of the explosion-proof structure reserve deformation space, the top of the explosion-proof structure is connected with pressure relief part;
[0007] The pressure relief part comprises a pressure relief pipe and a movable block, the pressure relief pipe is internally provided with a chute distributed along the length direction of the pressure relief pipe, the chute is in communication with the accommodating space, the inner wall of the chute is provided with a slide rail, the movable block is slidably connected to the slide rail, the side surface of the pressure relief pipe is provided with a transparent window for observing the movable block, the transparent window is arranged away from the capacitor, and a gas discharge pipeline is arranged at the side of the transparent window and is in communication with the chute.
[0008] As one of the improvements of the above technical solution, a groove is arranged at the top surface center of the explosion-proof structure, a passage in communication with the accommodating space is arranged at the bottom surface of the groove, the pressure relief pipe is installed in the groove, the chute is in communication with the passage, and the transparent window is arranged outside the groove.
[0009] As one of the improvements of the above technical solution, a colored coating layer is coated on the surface of the movable block.
[0010] As one of the improvements of the above technical solution, the transparent window comprises transparent explosion-proof glass, and the pressure relief pipe is provided with an opening for installing the transparent explosion-proof glass.
[0011] As one of the improvements of the above technical solution, the explosion-proof structure comprises two symmetrical circular end covers and explosion-proof membranes, the opposite ends of the explosion-proof membranes are connected to the two circular end covers respectively, the explosion-proof membranes are arranged along the edges of the circular end covers, and the explosion-proof membranes enclose a hollow cylinder.
[0012] As one of the improvements of the above technical solution, a sandwich layer is arranged between the explosion-proof membranes, and longitudinal and transverse intersecting sheet-shaped reinforcing ribs are connected in the sandwich layer.
[0013] As one of the improvements of the above technical solution, a collecting groove is arranged at the inner side of the circular end cover.
[0014] The capacitor is provided with a pressure relief pipe and a movable block, when abnormality occurs in the capacitor and gas is generated, the gas enters the chute and lifts the movable block, when the movable block is lifted to a certain extent, the movable block is exposed from the transparent window, at this time, the worker can know that the capacitor is faulty, if the capacitor continues to generate gas, the movable block will continue to be lifted until the gas discharge pipeline is opened to discharge the gas, accumulation of the gas in the explosion-proof structure is avoided, and safe operation of the device is ensured.
[0015] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application, of course, implementation of any product or method of the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0017] Figure 1 is a structural schematic diagram of the capacitor of the present application.
[0018] Figure 2 is a structural schematic diagram of the capacitor of the present application.
[0019] Figure 3 is a structural schematic diagram of the pressure relief part of the present application.
[0020] Figure 4 is a structural schematic diagram of the sheet-shaped reinforcing rib of the present application.
[0021] Figure 5 is a structural schematic diagram of the explosion-proof membrane of the present application.
[0022] In the figure: 1, explosion-proof structure; 2, pressure relief part; 3, capacitor; 4, elastic clamping block; 11, containing space; 12, explosion-proof membrane; 13, circular end cover; 21, pressure relief pipe; 22, sliding groove; 23, movable block; 24, transparent window; 25, air release pipe; 111, first membrane layer; 112, second membrane layer; 113, sheet-shaped reinforcing rib; 121, collecting groove. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0024] In this paper, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this paper can be combined with other embodiments.
[0025] Please refer to Figure 1-5The utility model discloses an explosion -proof structure for capacitor, the inside of explosion -proof structure 1 is equipped with the accommodation space 11 for installing capacitor 3, be equipped with a plurality of annular equidistance distribution's elastic clamping block 4 on the inner wall of explosion -proof structure 1, a plurality of elastic clamping block 4 are used for clamping capacitor 3 to make the end face of capacitor 3 and the inner wall of explosion -proof structure 1 reserve deformation space, in this embodiment, elastic clamping block 4 is the rubber or silica gel etc. with certain elasticity, it is not only used for clamping capacitor 3, can also buffer and absorb outside vibration, prevent capacitor 3 from loosening or damaging in the process of transportation or operation due to vibration, and the reserved deformation space can also help to relieve the mechanical stress caused by vibration, improve the stability and service life of system, since capacitor 3 can expand due to heat when operating, elastic clamping block 4 and deformation space jointly act, provide expansion space for capacitor 3, avoid stress concentration or damage due to thermal expansion and contraction,
[0026] Further, since before the explosion of capacitor 3, it will usually be accompanied by the generation of gas, due to the decomposition of electrolyte or internal chemical reaction abnormality leads to, for this, it is necessary to connect the pressure relief part 2 at the top of explosion -proof structure 1;Pressure relief part 2 includes pressure relief pipe 21 and movable block 23, the inside of pressure relief pipe 21 is equipped with chute 22 along its length direction distribution, chute 22 is communicated with accommodation space 11, the inner wall of chute 22 is equipped with slide rail, movable block 23 is slidably connected on the slide rail, the side of pressure relief pipe 21 is equipped with transparent window 24 for observing movable block 23, transparent window 24 is set away from capacitor 3, the side of transparent window 24 is equipped with air pipe 25, air pipe 25 is communicated with chute 22, pressure relief part 2 can discharge pressure in time when the abnormality (such as electrolyte decomposition or chemical reaction abnormality) in capacitor 3 and gas generation, prevent explosion -proof structure 1 from breaking due to overpressure, specifically:
[0027] When capacitor 3 appears abnormality and generates gas, these gases will rapidly fill the accommodation space 11 of explosion -proof structure 1, and enter the chute 22, the gas entering the chute 22 directly acts on the bottom of movable block 23, since movable block 23 is slidably connected on the slide rail, under the action of gas, movable block 23 will be lifted, when movable block 23 is lifted to a certain degree, it will be exposed from transparent window 24, at this time, the staff can know that the capacitor 3 fails, if capacitor 3 continues to generate gas, movable block 23 will continue to be lifted until opening air pipe 25 to bleed, avoid gas accumulation in explosion -proof structure 1, ensure that the device can operate safely.
[0028] Regarding the connection of the explosion-proof structure 1 and the pressure relief pipe 21, a recess is arranged at the center of the top surface of the explosion-proof structure 1, a passage communicating with the containing space 11 is arranged on the bottom surface of the recess, the pressure relief pipe 21 is installed in the recess, the sliding groove 22 communicates with the passage, and the transparent window 24 is arranged outside the recess. By arranging the recess on the top surface of the explosion-proof structure 1 for installing the pressure relief pipe 21, the occupied space can be minimized. Preferably, the surface of the movable block 23 is coated with a colored coating, for example, red or green paint. When the movable block 23 is lifted to be exposed from the transparent window 24, the staff can timely find that the capacitor 3 fails. The transparent window 24 specifically comprises transparent explosion-proof glass, and the pressure relief pipe 21 is provided with an opening for installing the transparent explosion-proof glass.
[0029] In some embodiments, the explosion-proof structure 1 comprises two symmetrical circular end covers 13 and explosion-proof membranes 12, the opposite ends of the explosion-proof membranes 12 are connected with the two circular end covers 13 respectively, the explosion-proof membranes 12 are arranged along the edges of the circular end covers 13 and enclose a hollow cylinder, specifically, the two sides of the explosion-proof membranes 12 are connected with the edge of the end surface of the two circular end covers 13 respectively, and the leading end and the tail end of the explosion-proof membrane 12 are connected and closed, thereby enclosing the above-mentioned hollow cylinder, and the hollow cylinder is the above-mentioned containing space 11. In addition, the circular end cover 13 at the bottom also reserves a hole for installing the lead of the capacitor 3. The sealing of the hole is known to those skilled in the art and will not be described in detail here.
[0030] Preferably, a sandwich layer is arranged between the explosion-proof membranes 12, and the sandwich layer is connected with longitudinally and transversely arranged sheet-shaped reinforcing ribs 113. Specifically, the explosion-proof membrane 12 comprises a first membrane layer 111 and a second membrane layer 112 arranged at intervals, the sheet-shaped reinforcing rib 113 comprises a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the leading end and the tail end of the first reinforcing rib are connected and closed to form a circular ring, the plurality of first reinforcing ribs are arranged at intervals along the height direction of the explosion-proof membrane 12, and the plurality of second reinforcing ribs are distributed at equal intervals in a ring shape along the edge of the circular end cover 13, the two ends of the second reinforcing rib are connected with the two circular end covers 13 respectively, the first reinforcing rib is connected with the second reinforcing rib, and the inner side of the circular end cover 13 at the bottom is provided with a collection groove 121, which can be used for collecting the overflow electrolyte when the capacitor 3 is abnormal or ruptured.
[0031] In some embodiments, the utility model is also provided with an automatic open circuit. Specifically, when the capacitor 3 fails, the internal pressure rises sharply, triggering the internal safety mechanism (such as a pressure relief valve or a partition) to make the capacitor 3 open or disconnect. This mechanism is generally activated when the capacitor 3 abnormally expands, ruptures or explodes, preventing the circuit from continuing to be energized.
[0032] Or a thermal disconnect mechanism is applied: when overheat or pressure increase occurs inside the capacitor 3, the thermal disconnect device triggers and disconnects the capacitor, thus opening the circuit and preventing further damage.
[0033] It should be noted that the terms "first", "second" and the like in the description and in the claims are used only for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc. are to be interpreted, by those skilled in the art, as a "1st", "2nd" or "n-th" element respectively without regard to the order and / or the positions of the elements. Thus, a "first" feature discussed above could be termed a "second" feature without departing from the teachings of the present application.
[0034] It will be apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The foregoing exemplary embodiments are therefore to be considered in all respects as illustrative only and not restrictive in nature. It should also be understood that the scope of the application is not limited to the specific interrelated products, methods, conditions, or parameters described herein, and / or through the limiting terminology shown and / or made of claim herein but extend into whenever a specific interrelated product, method, condition, or parameter otherwise falling within the defining characteristics of the application occurs.
Claims
1. An explosion-proof structure for capacitors, characterized in that, The explosion-proof structure has an internal space for installing the capacitor. The inner wall of the explosion-proof structure is provided with a number of elastic clamps distributed in a ring at equal intervals. The elastic clamps are used to clamp the capacitor so that a deformation space is reserved between the end face of the capacitor and the inner wall of the explosion-proof structure. The top of the explosion-proof structure is connected to a pressure relief part. The pressure relief section includes a pressure relief pipe and a movable block. The pressure relief pipe has a sliding groove distributed along its length inside, and the sliding groove communicates with the receiving space. A slide rail is provided on the inner wall of the sliding groove, and the movable block is slidably connected to the slide rail. A transparent window for observing the movable block is provided on the side of the pressure relief pipe. The transparent window is located away from the capacitor. A venting pipe is provided on the side of the transparent window, and the venting pipe communicates with the sliding groove.
2. The explosion-proof structure for a capacitor according to claim 1, characterized in that: The explosion-proof structure has a groove at the center of its top surface, and a channel connecting the receiving space is provided on the bottom surface of the groove. The pressure relief pipe is installed in the groove, the slide is connected to the channel, and the transparent window is located on the outside of the groove.
3. The explosion-proof structure for capacitors according to claim 1, characterized in that: The surface of the movable block is coated with a colored coating.
4. The explosion-proof structure for a capacitor according to claim 1, characterized in that: The transparent window includes transparent explosion-proof glass, and the pressure relief pipe has an opening for installing the transparent explosion-proof glass.
5. The explosion-proof structure for a capacitor according to claim 4, characterized in that: The explosion-proof structure includes two symmetrically arranged circular end caps and an explosion-proof membrane. The two circular end caps are respectively connected to opposite ends of the explosion-proof membrane. The explosion-proof membrane is arranged along the edge of the circular end caps and the explosion-proof membrane forms a hollow cylinder.
6. The explosion-proof structure for a capacitor according to claim 5, characterized in that: The explosion-proof membranes are sandwiched together, and the sandwiched membranes are connected with crisscrossing sheet-like reinforcing ribs.
7. The explosion-proof structure for a capacitor according to claim 6, characterized in that: The inner side of the circular end cap is provided with a collection groove.