Extrusion type rubber sealing plug for sealing capacitor

Abstract

The utility model provides an extrusion type rubber sealing plug for sealing a capacitor, and belongs to the field of capacitors. The problem that the fixing and sealing effects of an existing capacitor lead hole are poor is solved. The extrusion type sealing capacitor rubber sealing plug comprises a rubber plug base body, two lead holes are formed in the rubber plug base body, a sealing mechanism is arranged in each lead hole, each sealing mechanism comprises a sealing piece, a fixing sleeve, a sliding sleeve and a pressing plate, the fixing sleeves are communicated with the lead holes in the rubber plug base body, the sliding sleeves are located in the center of the pressing plate, and the pressing plates are arranged on the fixing sleeves. The outer edge of the pressing plate extends downwards in the axial direction to form an extending folded edge in a protruding mode, the end of the fixing sleeve extends outwards in the radial direction to form a connecting part, an annular groove is formed in the rubber plug base body, a fixing ring is arranged on the rubber plug base body, and the inner wall of the extending folded edge and the outer portion of the connecting ring are in internal and external thread fit. The fixing sleeve, the pressing plate and the sliding sleeve structure are matched to form an extrusion sealing cavity. The sealing structure has the advantage of high sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of capacitors and relates to a sealing plug, particularly a compression-type sealing rubber sealing plug for capacitors. Background Technology

[0002] Capacitors are the most widely used, largest-volume, and irreplaceable electronic components, accounting for about 40% of the total output of electronic components. Among them, aluminum electrolytic capacitors are the most important type of capacitor. During long-term operation, the electrolyte in aluminum electrolytic capacitors will diffuse outward through the sealing material, evaporate, and the capacitance will gradually decrease, eventually leading to failure.

[0003] Electrolyte evaporation is not only related to the temperature of the capacitor core, but the rubber sealing plug of the capacitor also directly affects the rate at which the electrolyte diffuses outward. In the production process of aluminum electrolytic capacitors, rubber sealing plugs are used to seal the capacitors and prevent the electrolyte from evaporating through the plug at high temperatures. However, the rubber plugs usually have two lead holes for the leads to pass through. During use, the electrolyte can still evaporate through the lead holes and between the leads, directly affecting the rate of electrolyte evaporation and diffusion, which reduces the efficiency and lifespan of the capacitor. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a compression-type sealing capacitor rubber plug to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: a rubber sealing plug for a squeeze-type sealed capacitor, including a plug substrate, wherein the plug substrate has a lead hole for the lead wire to pass through, and the number of lead holes is two; characterized in that a sealing mechanism for quick insertion and fixing of the lead wire and sealing against air leakage is provided inside the lead hole.

[0006] The sealing mechanism includes a sealing element for compression sealing, a fixed sleeve fixed to the rubber stopper base, a movable sliding sleeve, and a pressure plate fixed to the sliding sleeve;

[0007] The fixing sleeve is connected to the lead hole on the rubber plug substrate;

[0008] The sliding sleeve is located at the center of the pressure plate and is connected to the lead hole for the lead wire to pass through;

[0009] The outer edge of the pressure plate has an axially downward protruding extended flange for connection and fixation;

[0010] The end of the fixing sleeve extends radially outward and has a connecting part that facilitates connection and fastening;

[0011] The rubber stopper base is provided with an annular groove to facilitate the axial movement of the extended folded edge, and the rubber stopper base is also provided with a fixing ring that cooperates with the extended folded edge.

[0012] The inner wall of the extended folded edge and the outer side of the connecting ring are fitted with internal and external threads;

[0013] The sealing element is located between the outside of the sliding sleeve and the fixed sleeve wall, and is continuously tightened and pressed down by the pressure plate, with the lower side wall of the sealing element tightly attached to the outer wall of the lead wire.

[0014] The fixed sleeve, pressure plate, and sliding sleeve structure cooperate to form a compression sealing cavity for the installation of a sealing element and for compression sealing.

[0015] In the above-mentioned extrusion-type sealed capacitor rubber sealing plug, the sealing element has a sealing lip one and a sealing lip two for extrusion sealing. The sealing lip one is attached to the outer wall of the lead wire, and the sealing lip two is attached to the inside of the fixing sleeve.

[0016] In the above-mentioned extrusion-type sealed capacitor rubber sealing plug, the cross-section of the sliding sleeve is a truncated cone with an inclined structure, and the lower end of the sliding sleeve and the bottom of the fixed sleeve form a sealing gap that facilitates the sealing lip to pass through and fit with the lead wire.

[0017] In the above-mentioned extrusion-type sealed capacitor rubber sealing plug, the pressure plate and the sliding sleeve are continuously tightened and pressed down by the extension fold and the internal and external threads of the connecting part. The sliding sleeve and the pressure plate continuously compress and reduce the space of the extrusion sealing cavity, thereby extruding and deforming the sealing element, so that the sealing lip continuously and tightly fits the outside of the lead wire through the sealing gap.

[0018] Compared with existing technologies, the rubber sealing plug of this extrusion-type sealed capacitor has a downward-pressing sealing mechanism in the lead hole. This sealing mechanism can effectively achieve rapid insertion and fixation of the lead, prevent lead displacement from causing electrolyte penetration, improve sealing performance, solve the problem of electrolyte seepage and evaporation through the lead hole, and greatly extend the service life and working efficiency of the capacitor. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the rubber sealing plug for this extrusion-type sealed capacitor.

[0020] Figure 2 This is a half-section diagram of the rubber sealing plug of this extrusion-type sealed capacitor.

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the figure, 1. Rubber stopper base; 2. Lead wire hole; 3. Seal; 4. Fixing sleeve; 5. Sliding sleeve; 6. Pressure plate; 7. Extended folded edge; 8. Connecting part; 9. Ring groove; 10. Fixing ring; 11. Extrusion sealing cavity; 12. Sealing lip one; 13. Sealing lip two; 14. Sealing gap. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, this compression-type sealed capacitor rubber sealing plug includes a plug base 1. The plug base 1 has two lead holes 2 for lead wires to pass through. Each lead hole 2 has a sealing mechanism inside for quick lead wire insertion, fixation, and airtight sealing. This sealing mechanism includes a sealing element 3 for compression sealing, a fixing sleeve 4 fixed to the plug base 1, a movable sliding sleeve 5, and a pressure plate 6 fixed to the sliding sleeve 5. The fixing sleeve 4 communicates with the lead holes 2 on the plug base 1. The sliding sleeve 5 is located at the center of the pressure plate 6 and communicates with the lead holes 2 for lead wires to pass through. The outer edge of the pressure plate 6 has an axially downward protruding protrusion for... The extended flange 7 is connected and fixed. The end of the fixed sleeve 4 extends radially outward to facilitate connection and fixation. The rubber plug base 1 is provided with an annular groove 9 to facilitate axial movement of the extended flange 7. The rubber plug base 1 is also provided with a fixed ring 10 that cooperates with the extended flange 7. The inner wall of the extended flange 7 and the outer side of the connecting ring are internally and externally threaded. The sealing element 3 is located between the outer side of the sliding sleeve 5 and the wall of the fixed sleeve 4, and is continuously tightened and pressed down by the pressure plate 6. The lower side wall of the sealing element 3 is tightly attached to the outer wall of the lead wire. The fixed sleeve 4, the pressure plate 6 and the sliding sleeve 5 are structurally matched to form a compression sealing cavity 11 for the sealing element 3 to be installed inside and for compression sealing.

[0025] By setting a pressure-type sealing mechanism inside the lead hole 2, the lead wire can be quickly inserted and fixed, preventing the electrolyte from seeping in due to lead wire displacement. At the same time, the sealing performance is improved, solving the problem of electrolyte seepage and evaporation through the lead hole 2, greatly extending the service life of the capacitor and the working efficiency of the capacitor.

[0026] The structure of pressure plate 6, sliding plate, extended folded edge 7 and connecting part 8 can be used to continuously tighten and loosen, so as to squeeze and seal the sealing element 3. At the same time, it is easy to disassemble later, especially for large capacitors, which facilitates disassembly and maintenance and reduces wear and tear costs.

[0027] To elaborate further, in order to facilitate the lead wire's passage and improve its sealing and air-proof performance after assembly, the sealing element 3 has a sealing lip 12 and a sealing lip 13 for compression sealing. The sealing lip 12 fits against the outer wall of the lead wire, and the sealing lip 13 fits against the inside of the fixed sleeve 4. The sliding sleeve 5 has a cross-section with an inclined frustum structure. The lower end of the sliding sleeve 5 and the bottom of the fixed sleeve 4 form a sealing gap 14 to facilitate the sealing lip 12 to pass through and fit against the lead wire. The pressure plate 6 and the sliding sleeve 5 are continuously tightened and pressed down by the extension folded edge 7 and the internal and external threads of the connecting part 8. The sliding sleeve 5 and the pressure plate 6 continuously compress and reduce the space of their compression sealing cavity 11, thereby deforming the sealing element 3 and making its sealing lip 12 fit tightly against the outside of the lead wire through the sealing gap 14.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0029] Although this document uses a lot of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any kind of additional limitation would contradict the spirit of this invention.

Claims

1. A rubber sealing plug for a compression-type sealed capacitor, comprising a plug substrate (1), wherein the plug substrate (1) has lead holes (2) for lead wires to pass through, wherein the number of lead holes (2) is two, characterized in that, The lead hole (2) is provided with a sealing mechanism for quick insertion and fixation of the lead wire and for sealing and preventing air leakage. The sealing mechanism includes a sealing element (3) for compression sealing, a fixing sleeve (4) fixed to the rubber plug base (1), a movable sliding sleeve (5), and a pressure plate (6) fixed to the sliding sleeve (5). The fixing sleeve (4) is connected to the lead hole (2) on the rubber plug substrate (1); The sliding sleeve (5) is located at the center of the pressure plate (6) and is connected to the lead hole (2) for the lead wire to pass through; The outer edge of the pressure plate (6) has an axially downward protruding extended flange (7) for connection and fixation. The end of the fixing sleeve (4) extends radially outward and has a connecting part (8) that facilitates connection and fastening. The rubber stopper base (1) is provided with an annular groove (9) to facilitate the axial movement of the extended fold (7), and the rubber stopper base (1) is also provided with a fixing ring (10) that cooperates with the extended fold (7). The inner wall of the extended flange (7) and the outer wall of the connecting ring are fitted with internal and external threads; The sealing element (3) is located between the outside of the sliding sleeve (5) and the wall of the fixed sleeve (4), and is continuously tightened and pressed down by the pressure plate (6), with the lower side wall of the sealing element (3) tightly attached to the outer wall of the lead wire; The fixed sleeve (4), pressure plate (6) and sliding sleeve (5) are structurally coordinated to form a compression sealing cavity (11) in which the sealing element (3) is installed and used for compression sealing.

2. The extrusion-type sealed capacitor rubber sealing plug according to claim 1, characterized in that, The seal (3) has a sealing lip one (12) and a sealing lip two (13) for compression sealing. The sealing lip one (12) is attached to the outer wall of the lead wire, and the sealing lip two (13) is attached to the inside of the fixing sleeve (4).

3. The extrusion-type sealed capacitor rubber sealing plug according to claim 2, characterized in that, The sliding sleeve (5) has a truncated cone-shaped cross section. The lower end of the sliding sleeve (5) and the bottom of the fixed sleeve (4) form a sealing gap (14) that allows the sealing lip (12) to pass through and fit with the lead wire.

4. The extrusion-type sealed capacitor rubber sealing plug according to claim 3, characterized in that, The pressure plate (6) and the sliding sleeve (5) are continuously tightened and pressed down by the extension fold (7) and the internal and external threads of the connecting part (8). The sliding sleeve (5) and the pressure plate (6) continuously compress and reduce the space of the compression sealing cavity (11), thereby compressing and deforming the sealing element (3) so that its sealing lip (12) continuously and tightly fits the outside of the lead wire through the sealing gap (14).

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