High-sealing leakage-proof aluminum electrolytic capacitor structure

Abstract

The utility model discloses a high-sealing liquid-leakage-proof aluminum electrolytic capacitor structure, relates to the technical field of capacitors, and solves the problems that an existing aluminum electrolytic capacitor is connected with an aluminum shell only through extrusion of a sealing cover plate in the assembling process, then electrolyte in the aluminum electrolytic capacitor is prevented from leaking, the anti-pressure capability of the aluminum electrolytic capacitor is low, and the service life of the aluminum electrolytic capacitor is prolonged. And the aluminum electrolytic capacitor is easy to damage when being extruded, so that the quality of the aluminum electrolytic capacitor is poor. Comprising a heat-shrinkable sleeve, and an aluminum shell sleeve is arranged in the heat-shrinkable sleeve; according to the utility model, the sealing expansion glue flows into the annular fluid groove for filling expansion, so that a second sealing effect is formed between the sealing cover plate and the aluminum shell sleeve, a high sealing effect is formed between the aluminum shell sleeve and the sealing cover plate, the sealing cover plate is positioned and pressed, and the sealing cover plate is prevented from being damaged in the process of pouring the sealing glue. And the sealing cover plate is pushed upwards.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a structure of an aluminum electrolytic capacitor with high sealing and anti-leakage liquid. Background Technique

[0002] A capacitor is an energy storage component, which is used for tuning, filtering, coupling, bypassing, energy conversion and time delay in a circuit. An aluminum electrolytic capacitor is a capacitor made by using an aluminum cylinder as the negative electrode, filled with a liquid electrolyte inside, and inserting a bent aluminum strip as the positive electrode;

[0003] According to the "aluminum electrolytic capacitor" provided by the Chinese patent authorization announcement number N218602269U, the cooperation of multiple pressure-bearing blocks and multiple silica gel sleeves inside the capacitor housing can increase its compressive and pressure-resistant performance. A protective frame is formed by the bottom plate, multiple support plates and the top plate, so as to protect the core package inside the protective sleeve in multiple directions;

[0004] However, during the assembly process of the aluminum electrolytic capacitor, it is only connected to the aluminum shell through the extrusion of the sealing cover plate, and then the electrolyte leakage inside the aluminum electrolytic capacitor is prevented. The aluminum electrolytic capacitor has a low compressive capacity, so that the aluminum electrolytic capacitor is easily damaged when being extruded, resulting in poor quality of the aluminum electrolytic capacitor;

[0005] Therefore, a structure of an aluminum electrolytic capacitor with high sealing and anti-leakage liquid is designed to solve the above problems. Content of the Utility Model

[0006] The utility model provides a structure of an aluminum electrolytic capacitor with high sealing and anti-leakage liquid, and solves the technical problems that during the assembly process of the aluminum electrolytic capacitor, it is only connected to the aluminum shell through the extrusion of the sealing cover plate, and then the electrolyte leakage inside the aluminum electrolytic capacitor is prevented. The aluminum electrolytic capacitor has a low compressive capacity, so that the aluminum electrolytic capacitor is easily damaged when being extruded, resulting in poor quality of the aluminum electrolytic capacitor.

[0007] To solve the above technical problems, a structure of an aluminum electrolytic capacitor with high sealing and anti-leakage liquid provided by the utility model includes a heat shrinkable sleeve. An aluminum shell sleeve is arranged inside the heat shrinkable sleeve. Inside the aluminum shell sleeve, there are an anode foil, an electrolytic paper, a cathode foil and a tape paper from inside to outside in sequence. The inside of the aluminum shell sleeve is filled with an electrolyte. A sealing cover plate is arranged at the top of the aluminum shell sleeve. A rubber plug is arranged inside the sealing cover plate. Two lead foils are inserted into the rubber plug. The bottom ends of the two lead foils penetrate through the rubber plug and are inserted into the inside of the aluminum shell sleeve. A socket assembly is arranged outside the heat shrinkable sleeve. A sealing and anti-leakage assembly is arranged outside the sealing cover plate.

[0008] Preferably, the seal and leakage prevention assembly includes an extension tube, an annular filling groove, an annular fluid groove, discharge holes and a sealing strip. The bottom of the sealing cover plate is fixedly connected with the extension tube. The bottom end of the extension tube is sleeved with the aluminum shell sleeve. Three sealing strips are fixedly sleeved on the outer part of the extension tube. All the three sealing strips are in contact with the inner wall of the aluminum shell sleeve. An annular filling groove is formed in the outer wall of the sealing cover plate. An annular fluid groove is formed in the inner wall of the annular filling groove. Three discharge holes are formed in the sealing cover plate. All the three discharge holes are connected with the annular fluid groove.

[0009] Preferably, three filling holes are formed in the top of the sealing cover plate. The three filling holes are respectively connected with the corresponding discharge holes.

[0010] Preferably, two sealing rubber cylinders are fixedly sleeved inside the rubber plug. Both the lead foil strips are hermetically sleeved with the rubber plug through the sealing rubber cylinders.

[0011] Preferably, the socket assembly includes a blocking ring sleeve and a tightening belt. The blocking ring sleeve is fixedly sleeved on the outer part of the heat shrinkable tube. Two tightening belts are fixedly connected to the outer part of the blocking ring sleeve. The two tightening belts are symmetrically distributed around the axis of the blocking ring sleeve. Both the two tightening belts are sleeved with the sealing cover plate.

[0012] Preferably, a gasket is arranged inside the aluminum shell sleeve. The gasket and the sealing cover plate are located in the same vertical plane.

[0013] Compared with the related art, a structure of an aluminum electrolytic capacitor with high sealing and leakage prevention provided by the utility model has the following beneficial effects:

[0014] The utility model provides a structure of an aluminum electrolytic capacitor with high sealing and leakage prevention. By fixedly installing an extension tube at the bottom of the sealing cover plate and fixedly sleeving three sealing strips on the outer part of the extension tube to be in contact with the inner wall of the aluminum shell sleeve, a first sealing effect is formed between the aluminum shell sleeve and the sealing cover plate. Cooperating with the annular filling groove formed in the outer wall of the sealing cover plate, then cooperating with the annular fluid groove formed in the inner wall of the annular filling groove, and connecting the filling hole with the discharge hole inside the annular fluid groove, so that the sealing expansion glue flows into the inside of the annular fluid groove for filling and expansion, a second sealing effect is formed between the sealing cover plate and the aluminum shell sleeve, and a high sealing effect is formed between the aluminum shell sleeve and the sealing cover plate.

[0015] By fixedly sleeving a blocking ring sleeve on the outer part of the heat shrinkable tube, the two tightening belts are positioned and supported, so that the two tightening belts are sleeved with the sealing cover plate, and then the sealing cover plate is positioned and pressed tightly to prevent the sealing cover plate from being pushed up during the pouring of the sealing glue. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the overall decomposition of the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the overall exterior of the present utility model;

[0018] Figure 3 It is the present utility model Figure 1 A schematic enlarged structural diagram of a partial part in the present utility model;

[0019] Figure 4 It is the present utility model Figure 1 A schematic enlarged structural diagram of the part at A in the present utility model.

[0020] Reference numerals in the figure: 1, heat shrinkable tube; 2, aluminum shell sleeve; 3, electrolyte; 4, sealing cover plate; 5, lead foil strip; 6, socket assembly; 601, blocking ring sleeve; 602, tightening band; 7, anode foil; 8, electrolytic paper; 9, sealing and leak-proof assembly; 901, extension tube; 902, annular filling groove; 903, annular fluid groove; 904, discharge hole; 905, sealing rubber strip; 10, cathode foil; 11, adhesive tape; 12, rubber plug; 13, sealing rubber cylinder; 14, filling hole; 15, gasket. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] As shown by Figures 1-4 A structure of an aluminum electrolytic capacitor with high sealing and leak-proof liquid of the present utility model includes a heat shrinkable tube 1. An aluminum shell sleeve 2 is arranged inside the heat shrinkable tube 1. Inside the aluminum shell sleeve 2, there are an anode foil 7, an electrolytic paper 8, a cathode foil 10, and an adhesive tape 11 in sequence from inside to outside. The inside of the aluminum shell sleeve 2 is filled with an electrolyte 3. A sealing cover plate 4 is arranged at the top of the aluminum shell sleeve 2. A rubber plug 12 is arranged inside the sealing cover plate 4. Two lead foil strips 5 are inserted into the rubber plug 12. The bottom ends of the two lead foil strips 5 both penetrate through the rubber plug 12 and are inserted into the inside of the aluminum shell sleeve 2. A socket assembly 6 is arranged outside the heat shrinkable tube 1, and a sealing and leak-proof assembly 9 is arranged outside the sealing cover plate 4.

[0023] Refer to Figure 3, the seal and leak-proof component 9 includes an extension pipe 901, an annular filling groove 902, an annular fluid groove 903, a discharge hole 904 and a sealing strip 905. The bottom of the sealing cover plate 4 is fixedly connected to the extension pipe 901. The bottom end of the extension pipe 901 is sleeved with the aluminum shell sleeve 2. Three sealing strips 905 are fixedly sleeved on the outside of the extension pipe 901. All three sealing strips 905 are in contact with the inner wall of the aluminum shell sleeve 2. An annular filling groove 902 is opened on the outer wall of the sealing cover plate 4. An annular fluid groove 903 is opened on the inner wall of the annular filling groove 902. Three discharge holes 904 are opened inside the sealing cover plate 4. All three discharge holes 904 are connected to the annular fluid groove 903. Through the setting of the sealing strip 905, a first sealing effect is formed between the extension pipe 901 and the aluminum shell sleeve 2. Secondly, sealing and expanding glue is filled inside the annular filling groove 903, so that a second sealing effect is formed between the sealing cover plate 4 and the aluminum shell sleeve 2, so that a high-sealing effect is formed between the aluminum shell sleeve 2 and the sealing cover plate 4.

[0024] Refer to Figure 3 , three filling holes 14 are opened on the top of the sealing cover plate 4. The three filling holes 14 are respectively connected to the corresponding discharge holes 904, so that the sealing and expanding glue can be filled into the inside of the annular fluid groove 2 to flow.

[0025] Refer to Figure 3 , two sealing rubber cylinders 13 are fixedly sleeved inside the rubber plug 12. Both of the two lead foil strips 5 are hermetically sleeved with the rubber plug 12 through the sealing rubber cylinders 13, so that the lead foil strips 5 and the rubber plug 12 are hermetically sleeved to prevent fluid leakage.

[0026] Refer to Figure 2 , the socketing component 6 includes a blocking ring sleeve 601 and a tightening belt 602. The blocking ring sleeve 601 is fixedly sleeved on the outside of the heat-shrinkable tube 1. Two tightening belts 602 are fixedly connected to the outside of the blocking ring sleeve 601. The two tightening belts 602 are symmetrically distributed around the axis of the blocking ring sleeve 601. Both of the two tightening belts 602 are sleeved with the sealing cover plate 4, so that the sealing cover plate 4 can be stably socketed and pressed, preventing the sealing cover plate 4 from being pushed up during the pouring of the sealing glue.

[0027] Refer to Figure 1 , a gasket 15 is provided inside the aluminum shell sleeve 2. The gasket 15 and the sealing cover plate 4 are in the same vertical plane, so as to horizontally support the internal structure of the aluminum electrolytic capacitor.

[0028] Working principle: First, a sealing cover plate 4 is provided at the top of the aluminum shell sleeve 2 to seal and connect the aluminum shell sleeve 2. Secondly, an extension pipe 901 is fixedly installed at the bottom of the sealing cover plate 4, and three sealing rubber strips 905 are fixedly sleeved outside the extension pipe 901 and are in contact with the inner wall of the aluminum shell sleeve 2, so as to form a first sealing effect between the aluminum shell sleeve 2 and the sealing cover plate 4. In cooperation with an annular filling groove 902 formed on the outer wall of the sealing cover plate 4, an annular fluid groove 903 is formed on the inner wall of the annular filling groove 902, and the filling hole 14 is connected to the discharge hole 904 inside the annular fluid groove 903, so that the sealing expansion glue flows into the inside of the annular fluid groove 903 for filling and expansion, so as to form a second sealing effect between the sealing cover plate 4 and the aluminum shell sleeve 2, and a high-sealing effect is formed between the aluminum shell sleeve 2 and the sealing cover plate 4; By fixedly sleeving a blocking ring sleeve 601 outside the heat-shrinkable sleeve 1, the two tightening belts 602 are positioned and supported, so that the two tightening belts 602 are sleeved on the sealing cover plate 4, and then the sealing cover plate 4 is positioned and pressed tightly to prevent the sealing cover plate 4 from being pushed up during the pouring of the sealing glue.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly sealed and leakproof aluminum electrolytic capacitor structure, comprising a heat shrinkable sleeve (1), characterized in that: An aluminum shell (2) is provided inside the heat shrinkable sleeve (1), and the aluminum shell (2) is provided with an anode foil (7), electrolytic paper (8), cathode foil (10) and adhesive tape (11) from the inside to the outside. The aluminum shell (2) is filled with an electrolyte (3). A sealing cover (4) is provided on the top of the aluminum shell (2), and a rubber plug (12) is provided inside the sealing cover (4). Two lead foil strips (5) are inserted inside the rubber plug (12), and the bottom ends of the two lead foil strips (5) pass through the rubber plug (12) and are inserted into the aluminum shell (2). A sleeve assembly (6) is provided outside the heat shrinkable sleeve (1), and a sealing and leak-proof assembly (9) is provided outside the sealing cover (4).

2. A highly sealed and leakproof aluminum electrolytic capacitor structure according to claim 1, characterized in that: The sealing and leak-proof component (9) comprises an extension tube (901), an annular filling groove (902), an annular fluid groove (903), a discharge hole (904) and a sealing rubber strip (905); the bottom of the sealing cover plate (4) is fixedly connected with the extension tube (901); the bottom end of the extension tube (901) is sleeved with the aluminum shell sleeve (2); the outside of the extension tube (901) is fixedly sleeved with three sealing rubber strips (905); the three sealing rubber strips (905) are all in contact with the inner wall of the aluminum shell sleeve (2); the outer wall of the sealing cover plate (4) is provided with an annular filling groove (902); the inner wall of the annular filling groove (902) is provided with an annular fluid groove (903); the inside of the sealing cover plate (4) is provided with three discharge holes (904); the three discharge holes (904) are all connected with the annular fluid groove (903).

3. A highly sealed and leakproof aluminum electrolytic capacitor structure according to claim 2, characterized in that: The top of the sealing cover plate (4) is provided with three filling holes (14), and the three filling holes (14) are respectively connected to corresponding discharge holes (904).

4. The highly sealed and leakproof aluminum electrolytic capacitor structure according to claim 1, characterized in that: Two sealing rubber tubes (13) are fixedly sleeved inside the rubber plug (12), and the two foil guide strips (5) are both sealed and sleeved with the rubber plug (12) via the sealing rubber tubes (13).

5. The highly sealed and leakproof aluminum electrolytic capacitor structure according to claim 1, characterized in that: The sleeve assembly (6) comprises a blocking ring (601) and a tightening band (602); the outer portion of the heat shrinkable sleeve (1) is fixedly sleeved with the blocking ring (601); the outer portion of the blocking ring (601) is fixedly connected with two tightening bands (602); the two tightening bands (602) are symmetrically distributed with the axis of the blocking ring (601) as the center; and the two tightening bands (602) are sleeved with the sealing cover plate (4).

6. The highly sealed and leakproof aluminum electrolytic capacitor structure according to claim 1, characterized in that: A gasket (15) is provided inside the aluminum shell (2), and the gasket (15) and the sealing cover plate (4) are located on the same vertical plane.

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