Electrolytic capacitor metal shell with explosion-proof structure

Abstract

The utility model discloses an electrolytic capacitor metal shell with anti -explosion structure relates to electrolytic capacitor anti -explosion technical field, the utility model discloses an electrolytic capacitor body, electrolytic capacitor body surface fixedly connected with the fixed ring, the fixed ring top is provided with collection mechanism, the collection mechanism includes the fixed ring top fixed connection of installation ring, the collection pipe of screw thread connection in installation ring surface and is provided with the taper block of collection pipe top portion, the utility model discloses a circular ring collection pipe and the cooperation of taper block, when gas is discharged through the air -dispersing through -slot, electrolyte is intercepted storage between the liquid storage groove of collection pipe and capacitor body, and the sealing rubber strip prevents electrolyte leakage, and the cushion block ensures that the air -dispersing through -slot is unobstructed, and this movement process realizes gas -liquid separation, avoids electrolyte splash corrosion surrounding element, and also guarantees pressure quick release, and the safety and reliability of equipment are improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof technology for electrolytic capacitors, and in particular relates to a metal shell for an electrolytic capacitor with an explosion-proof structure. Background Technology

[0002] Electrolytic capacitors are polarized capacitors that use an electrolyte as the cathode or anode medium. They are characterized by a high capacitance-to-volume ratio and are widely used in power filtering, energy storage, and signal coupling. Their core structure includes a metal casing, anode foil, electrolyte, and sealing elements. However, because the electrolyte may decompose and produce gas under abnormal conditions such as overvoltage, high temperature, or reverse polarity, the internal pressure may increase sharply, posing a risk of explosion. Currently, electrolytic capacitors typically achieve explosion-proof functionality by setting a pressure relief groove on the top of the metal casing. When the internal pressure exceeds a threshold, the explosion-proof valve ruptures and releases gas, preventing the casing from bursting or fragments from flying.

[0003] Existing metal casings still present some problems during use. For example, gas release may carry a small amount of electrolyte, corroding surrounding circuits or components. Traditional electrolytic capacitors lack a collection structure for splashed electrolyte, leading to decreased equipment reliability. Furthermore, the casing may deform under external pressure, causing secondary leaks. Therefore, we provide an explosion-proof metal casing for electrolytic capacitors to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a metal casing for an electrolytic capacitor with an explosion-proof structure. Through the cooperation of the collection mechanism and the support mechanism, it solves the problem that the metal casing in the prior art does not have a collection structure designed for splashed electrolyte, which leads to a decrease in equipment reliability.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to a metal shell for an electrolytic capacitor with an explosion-proof structure, comprising an electrolytic capacitor body, a fixing ring fixedly connected to the surface of the electrolytic capacitor body, a collecting mechanism provided at the top of the fixing ring, the collecting mechanism comprising a mounting ring fixedly connected to the top of the fixing ring, a collecting tube threadedly connected to the surface of the mounting ring, and a conical block provided at the top of the collecting tube, and a supporting mechanism provided at the bottom of the fixing ring, the supporting mechanism comprising an extension rod fixedly connected to the bottom of the fixing ring, and a supporting ring fixedly connected to the bottom of the extension rod.

[0007] The present invention is further configured such that heat dissipation fins are fixedly connected to the surface of the electrolytic capacitor body, and the heat dissipation fins are located at the bottom of the fixing ring.

[0008] The present invention is further configured such that both the mounting ring and the collecting tube are annular, and there is a gap between the collecting tube and the electrolytic capacitor body to form a storage groove for collecting electrolyte.

[0009] The present invention is further configured such that a pad is fixedly connected to the top of the collecting tube, and the top of the pad is fixedly connected to the bottom of the conical block.

[0010] The present invention is further provided that a sealing groove is provided at the bottom of the collecting tube, and a sealing strip is provided inside the sealing groove.

[0011] The present invention is further configured such that the number of extension rods is eight, and two are fixedly connected to the top of the support ring in groups of two, and the support ring is a one-eighth circular ring.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model, through the cooperation of a circular collecting pipe and a conical block, allows the electrolyte to be intercepted and stored in the liquid storage groove between the collecting pipe and the capacitor body while the gas is discharged through the gas dissipation channel. The sealing strip prevents electrolyte leakage, and the pad ensures that the gas dissipation channel is unobstructed. This process achieves gas-liquid separation, which not only avoids electrolyte splashing and corrosion of surrounding components, but also ensures rapid pressure release, significantly improving the safety and reliability of the equipment.

[0014] 2. This utility model forms a three-dimensional support network by using a top collecting pipe and a conical block, and a bottom extension rod and a support ring. Eight sets of extension rods and segmented support rings work together to disperse external mechanical pressure, while heat dissipation fins assist in heat dissipation. When the shell is compressed, the support ring transmits the pressure evenly to the fixed ring through the extension rods to avoid local deformation. This movement process effectively enhances the shell's pressure resistance and prevents secondary leakage or structural damage caused by external forces.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a perspective view of the metal casing of an electrolytic capacitor with an explosion-proof structure.

[0018] Figure 2 This is a perspective view of the collecting and supporting mechanisms within the metal casing of an electrolytic capacitor with an explosion-proof structure.

[0019] Figure 3This is a longitudinal sectional view along the axis of the collecting tube in the metal casing of an electrolytic capacitor with an explosion-proof structure.

[0020] Figure 4 This is a structural diagram of the support mechanism in the metal casing of an electrolytic capacitor with an explosion-proof structure.

[0021] In the attached diagram: 1. Electrolytic capacitor body; 2. Fixing ring; 3. Collection mechanism; 301. Mounting ring; 302. Collection tube; 303. Conical block; 4. Support mechanism; 401. Extension rod; 402. Support ring; 5. Heat dissipation fins; 6. Pad. Detailed Implementation

[0022] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Please see Figures 1-4 This utility model is a metal shell for an electrolytic capacitor with an explosion-proof structure, including an electrolytic capacitor body 1, a fixing ring 2 fixedly connected to the surface of the electrolytic capacitor body 1, a collecting mechanism 3 provided at the top of the fixing ring 2, the collecting mechanism 3 including a mounting ring 301 fixedly connected to the top of the fixing ring 2, a collecting tube 302 threadedly connected to the surface of the mounting ring 301, and a conical block 303 provided at the top of the collecting tube 302, and a supporting mechanism 4 provided at the bottom of the fixing ring 2, the supporting mechanism 4 including an extension rod 401 fixedly connected to the bottom of the fixing ring 2, and a supporting ring 402 fixedly connected to the bottom of the extension rod 401.

[0025] Specifically: The collection mechanism 3 is mainly used to intercept and store the electrolyte splashed when the explosion-proof valve of the electrolytic capacitor releases gas. The annular collection tube 302 forms a liquid storage groove between itself and the capacitor body, which can effectively collect the splashed electrolyte and prevent it from corroding surrounding components. The gas dissipation groove between the conical block 303 and the collection tube 302 ensures that the gas is discharged in a directional manner, while the sealing strip prevents electrolyte leakage, thereby improving the safety and reliability of the equipment. The support mechanism 4 enhances the overall pressure resistance of the electrolytic capacitor through the coordinated design of the top collection tube 302 and the conical block 303, the bottom extension rod 401 and the support ring 402. The eight sets of extension rods 401 and the segmented support ring 402 disperse external mechanical pressure and prevent the shell from deforming, which could lead to secondary leakage or structural damage.

[0026] Example 2

[0027] Please see Figures 1-4Based on Example 1, a heat dissipation fin 5 is fixedly connected to the surface of the electrolytic capacitor body 1. The heat dissipation fin 5 is located at the bottom of the fixing ring 2. The mounting ring 301 and the collecting tube 302 are both annular. There is a gap between the collecting tube 302 and the electrolytic capacitor body 1, forming a liquid storage groove for collecting electrolyte. The inner diameter of the mounting ring 301 is larger than the diameter of the electrolytic capacitor body 1, forming a radial gap of 0.5-1mm. A pad 6 is fixedly connected to the top of the collecting tube 302. The top of the pad 6 is fixedly connected to the bottom of the conical block 303. The bottom of the conical block 303 extends into the interior of the collecting tube 302. A sealing groove is opened at the bottom of the collecting tube 302. A sealing strip is provided inside the sealing groove. There are eight extension rods 401, which are fixedly connected to the top of the support ring 402 in groups of two. The support ring 402 is an eighth of an annular shape.

[0028] Specifically: the heat dissipation fins 5 are used to dissipate the heat generated by the electrolytic capacitor body 1 during use; the annular mounting ring 301 and the collecting tube 302 form a liquid storage groove between the electrolytic capacitor body 1 to collect the splashed electrolyte; the pad 6 raises the conical block 303 upwards, forming a certain venting groove between the collecting tube 302 and the conical block 303 to allow gas to dissipate outwards; the sealing strip prevents the collected electrolyte from leaking through the connection between the mounting ring 301 and the collecting tube 302; the extension rod 401 and the support ring 402 support the top of the electrolytic capacitor body 1 during installation and use, while the extension rod 401 and the support ring 402 support the bottom of the electrolytic capacitor body 1, improving the pressure resistance of the electrolytic capacitor body 1 during use and preventing damage caused by compression.

[0029] The working principle of this utility model is as follows: When the pressure inside the electrolytic capacitor suddenly increases due to abnormal conditions, the explosion-proof valve ruptures and releases gas. The collection mechanism 3, through the cooperation of the annular collection pipe 302 and the conical block 303, intercepts the splashed electrolyte while the gas is discharged and guides it to the liquid storage groove for storage. The sealing strip ensures that the electrolyte does not leak out, while the gas dissipation groove maintains the smooth discharge of gas, thereby preventing the electrolyte from corroding the surrounding components.

[0030] The support mechanism 4 forms a three-dimensional support structure through the synergistic effect of the top collection pipe 302 and the conical block 303, the bottom extension rod 401 and the support ring 402. The eight sets of extension rods 401 and the segmented support ring 402 disperse the external mechanical pressure to prevent the outer shell from being deformed or crushed. At the same time, the heat dissipation fins 5 help to reduce the working temperature of the capacitor, further improving the stability and safety of the overall structure.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electrolytic capacitor metal case having an explosion-proof structure, comprising an electrolytic capacitor body (1), characterized in that: A fixing ring (2) is fixedly connected to the surface of the electrolytic capacitor body (1); The top of the fixed ring (2) is provided with a collection mechanism (3), which includes a mounting ring (301) fixedly connected to the top of the fixed ring (2), a collection tube (302) threadedly connected to the surface of the mounting ring (301), and a conical block (303) provided on the top of the collection tube (302). The bottom of the fixed ring (2) is provided with a support mechanism (4), which includes an extension rod (401) fixedly connected to the bottom of the fixed ring (2) and a support ring (402) fixedly connected to the bottom of the extension rod (401).

2. The metal case of an electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that: The electrolytic capacitor body (1) is fixedly connected to a heat dissipation fin (5), which is located at the bottom of the fixing ring (2).

3. The metal case of an electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that: Both the mounting ring (301) and the collecting tube (302) are annular, and there is a gap between the collecting tube (302) and the electrolytic capacitor body (1) to form a liquid storage groove for collecting electrolyte.

4. The metal case of an electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that: A pad (6) is fixedly connected to the top of the collection tube (302), and the top of the pad (6) is fixedly connected to the bottom of the conical block (303).

5. The metal casing of an electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that: The bottom of the collection tube (302) is provided with a sealing groove, and a sealing strip is provided inside the sealing groove.

6. The metal casing of an electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that: The number of extension rods (401) is eight, and two are fixedly connected to the top of the support ring (402) in groups of two. The support ring (402) is an eighth of a circle.

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