Sealed capacitor end cover

Abstract

The utility model relates to a sealed capacitor end cover, and relates to the technical field of capacitors, the sealed capacitor end cover comprises a cover plate body and a positioning bolt, the cover plate body is provided with a liquid injection port, the positioning bolt is in threaded connection with the inner wall of the liquid injection port, the positioning bolt is rotatably connected with an abutting block, and the cover plate body is provided with a plurality of elastic sealing assemblies. The projection portions of the elastic sealing assemblies in the extending direction of the liquid injection opening are located in the liquid injection opening, the abutting block is used for abutting against the elastic sealing assemblies so that the elastic sealing assemblies can abut against the inner wall of the capacitor, and a sealing gasket is arranged on the positioning bolt and abuts against the inner wall of the liquid injection opening. The sealing gasket is located between the abutting block and the cover plate body, the sealing gasket seals a gap between the inner wall of the liquid injection opening and the abutting block, at the moment, the elastic sealing assemblies abut against the abutting block, and even if the positioning bolt is loosened, the connection relation among the abutting block, the sealing gasket and the elastic sealing assemblies is not changed. And the sealing performance of the liquid injection port of the capacitor end cover is improved.

Description

Technical field:

[0001] The utility model belongs to the technical field of capacitors, in particular to a sealed capacitor end cover. Background technology:

[0002] The capacitor end cap is an important component of the capacitor, which can effectively protect the plates, electrolytes, etc. inside the capacitor from damage by the external environment, thereby maintaining the stable performance of the capacitor.

[0003] In the related art, an injection port for injecting electrolyte is opened on the end cover of the capacitor. After the electrolyte is injected, the injection port is sealed with bolts. As the usage time increases, the external ambient temperature changes, causing the bolts to easily expand and contract, which can easily lead to the bolts loosening, affecting the sealing of the injection port, and then affecting the sealing of the capacitor, which needs to be improved. Summary of the invention:

[0004] The utility model aims to improve the sealing performance of a liquid injection port of a capacitor end cover.

[0005] The utility model is achieved in this way:

[0006] A sealed capacitor end cover includes a cover body and a positioning bolt, wherein a liquid injection port is provided on the cover body, the positioning bolt is threadedly connected to the inner wall of the liquid injection port, a tightening block is rotatably connected to the positioning bolt, a plurality of elastic sealing components are provided on the cover body, the plurality of elastic sealing components are arranged around the liquid injection port, the projection of the elastic sealing component in the extension direction of the liquid injection port is located within the liquid injection port, the tightening block extends between the plurality of elastic sealing components, the tightening block is used to tighten the plurality of elastic sealing components so that the elastic sealing component presses against the inner wall of the capacitor, a sealing gasket is provided on the positioning bolt, and the sealing gasket presses against the inner wall of the liquid injection port.

[0007] Preferably, an anti-overflow opening is provided at one end of the tightening block away from the positioning bolt.

[0008] Preferably, a guide surface is provided on the elastic sealing assembly, and the guide surface is inclined from a direction away from the cover plate body toward a direction close to the central axis of the liquid filling port, and the guide surface abuts against the abutting block.

[0009] Preferably, a plurality of anti-slip grooves are provided on the outer peripheral wall of the pressing block.

[0010] Preferably, the anti-slip patterns are arranged around the outer circumference of the liquid injection port, and the distribution direction of several of the anti-slip patterns is parallel to the central axis of the liquid injection port.

[0011] Preferably, a plurality of heat dissipation fins are provided on the cover body, and the heat dissipation fins are located on a side of the cover body away from the elastic sealing assembly.

[0012] Preferably, the heat dissipation fins and the cover plate are spliced ​​to form a guide groove, and the guide groove is connected to the liquid injection port.

[0013] Preferably, the end of the cover plate away from the elastic sealing component is arranged to be tapered in a direction close to the liquid filling port.

[0014] The outstanding advantages of the utility model compared with the prior art are:

[0015] 1. After the electrolyte is injected into the present invention, the positioning bolt is rotated to allow the sealing gasket and the holding block to pass through the injection port. The holding block passing through the injection port presses against a plurality of elastic sealing components, so that the elastic sealing components press against the inner wall of the capacitor to seal the gap between the cover body and the capacitor. At the same time, the sealing gasket is located between the holding block and the cover body, and the sealing gasket seals the gap between the inner wall of the injection port and the holding block. At this time, a plurality of elastic sealing components press against the holding block to fix the holding block and the sealing gasket. As the capacitor is used for an increasing amount of time, even if the positioning bolt becomes loose, the connection relationship between the holding block, the sealing gasket and the elastic sealing component remains unchanged, which is conducive to maintaining the stable sealing of the capacitor and improving the sealing of the capacitor.

[0016] 2. The utility model provides an anti-overflow port, which is beneficial to reducing electrolyte overflow during the process of sealing the liquid outlet;

[0017] 3. The utility model adopts the design of the anti-slip groove, so that after the pressing block presses against the elastic sealing component, the pressing block is not easy to move away from the cover body. Description of the drawings:

[0018] Figure 1 This is a practical diagram of the overall structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the present invention, mainly showing the structure of the elastic sealing assembly when the positioning bolt is not installed;

[0020] Figure 3 This is a cross-sectional view of the present invention, mainly showing the structure of the liquid injection port after the positioning bolt is installed;

[0021] Figure 4 This utility model Figure 3 The enlarged view of part A in the middle mainly shows the connection between the elastic sealing assembly and the tightening block after the positioning bolt is installed in the liquid filling port;

[0022] Figure 5 This is a partial structural diagram of the utility model, which mainly shows the structure of the tightening block and the positioning bolt.

[0023] Explanation of the reference numerals: 1. Cover body; 11. Liquid filling port; 12. Heat dissipation fin; 13. Guide groove; 2. Positioning bolt; 21. Tightening block; 211. Anti-overflow port; 212. Anti-slip groove; 22. Sealing gasket; 3. Elastic sealing assembly; 31. Fixing buckle; 32. Sealing block; 33. Guide surface. Specific implementation method:

[0024] The present invention is further described below with reference to specific embodiments. Figure 1 —5:

[0025] The utility model discloses a sealed capacitor end cover. Figure 1 and Figure 2 , including a cover body 1 and a positioning bolt 2. The cover body 1 is provided with a liquid injection port 11, which penetrates the cover body 1 along the axial direction of the cover body 1. The electrolyte is injected into the capacitor through the liquid injection port 11. The positioning bolt 2 passes through the liquid injection port 11 and is threadedly connected to the inner wall of the liquid injection port 11.

[0026] Reference Figure 3 and Figure 4 The cross-section of the liquid injection port 11 is circular. A retaining block 21 is connected to the rotatable connection link on the positioning bolt 2. The cross-section of the retaining block 21 is the same as that of the liquid injection port 11. The retaining block 21 extends through the liquid injection port 11, and the rotation axis of the retaining block 21 and the rotation axis of the positioning bolt 2 are aligned. An anti-overflow opening 211 is provided at the end of the retaining block 21 away from the positioning bolt 2. The anti-overflow opening 211 is used to reduce electrolyte overflow when the liquid injection port 11 is sealed.

[0027] Reference Figure 4 and Figure 5 A sealing gasket 22 is installed on the positioning bolt 2. The sealing gasket 22 is arranged around the outer circumference of the positioning bolt 2. The opposite ends of the sealing gasket 22 parallel to the rotation axis of the positioning bolt 2 respectively abut the positioning bolt 2 and the tightening block 21. When the tightening block 21 passes through the liquid injection port 11, the sealing gasket 22 presses against the inner wall of the liquid injection port 11. The sealing gasket 22 is used to seal the gap between the tightening block 21 and the inner wall of the liquid injection port 11.

[0028] See also Figure 2 and Figure 3An elastic sealing assembly 3 is fixed to the cover body 1. Several elastic sealing assemblies 3 are located on the same side of the cover body 1. Several cover bodies 1 are arranged around the periphery of the liquid injection port 11. The elastic sealing assembly 3 is used to seal the gap between the cover body 1 and the capacitor. The elastic sealing assembly 3 includes a fixing clip 31 and a sealing block 32. The fixing clip 31 is located on the side of the corresponding sealing block 32 close to the liquid injection port 11. The fixing clip 31 is fixed to the cover body 1. The sealing block 32 is gradually expanded in the direction away from the fixing clip 31. The sealing block 32 is fan-shaped. The periphery of several sealing blocks 32 is spliced ​​together to form a circular shape. The sealing block 32 and the fixing clip 31 are fixedly connected. The fixing clip 31 can undergo elastic deformation. When the fixing clip 31 is only subjected to gravity, the projection of the fixing clip 31 in the direction parallel to the extension of the liquid injection port 11 is located inside the liquid injection port 11. A guide surface 33 is formed on the fixing clip 31. The guide surface 33 is located at the end of the fixing clip 31 away from the corresponding sealing block 32. The guide surface 33 is inclined from the direction away from the cover body 1 to the direction close to the central axis of the liquid filling port 11. The guide surface 33 fits the outer periphery of the pressing block 21.

[0029] When the abutment block 21 has not passed through the liquid injection port 11, the guide surface 33 is located in the movement path of the abutment block 21. After the abutment block 21 passes through the liquid injection port 11, the abutment block 21 abuts the guide surface 33, causing the fixing clip 31 to deform away from the liquid injection port 11, thereby causing the sealing block 32 to move away from the fixing clip 31 and press against the inner wall of the capacitor, improving the seal between the capacitor and the capacitor end cap. When the guide surface 33 is in contact with the abutment block 21, the projection of the fixing clip 31 in the direction of the centerline of the liquid injection port 11 is located outside the liquid injection port 11, and several fixing clips 31 press against the abutment block 21 to position it.

[0030] See also Figure 4 and Figure 5 A number of recessed anti-slip grooves 212 are formed on the outer peripheral wall of the clamping block 21. The distribution direction of the anti-slip grooves 212 is parallel to the central axis of the liquid injection port 11. The anti-slip grooves 212 are arranged around the outer peripheral wall of the clamping block 21. The anti-slip grooves 212 are used to increase the friction between the clamping block 21 and the number of fixing buckles 31, so that after the positioning bolt 2 is loosened, the clamping block 21 is not easy to slide away from the cover body 1, which is beneficial to improving the positioning stability of the clamping block 21 and maintaining the sealing at the liquid injection port 11.

[0031] During the installation of the capacitor end cover, the cover body 1 is initially fixed to the capacitor by screws or welding, and then the electrolyte is injected into the capacitor through the injection port 11. After the electrolyte is injected, the positioning bolt 2 is rotated to fix the positioning bolt 2 in the injection port 11, and the tightening block 21 passes through the injection port 11 to seal the capacitor and the end cover through the sealing block 32, and the injection port 11 is sealed by the cooperation between the tightening block 21 and the sealing gasket 22.

[0032] Reference Figure 1 and Figure 2 The end of the cover body 1 away from the sealing block 32 tapers toward the liquid injection port 11. Several heat dissipation fins 12 are formed on the cover body 1 and evenly spaced. The heat dissipation fins 12 are located on the side of the cover body 1 away from the sealing block 32. A guide groove 13 is formed between the heat dissipation fins 12 and the cover body 1. The guide groove 13 is connected to the liquid injection port 11, facilitating smoother entry of the electrolyte into the liquid injection port 11.

[0033] The implementation principle of a sealed capacitor end cover in an embodiment of the present application is as follows: after the liquid injection is completed, the tightening block 21 is passed through the liquid injection port 11 by the positioning bolt 2, and the liquid injection port 11 is sealed by the sealing gasket 22 and the tightening block 21, and the tightening block 21 is fixed by the elastic sealing component 3, so that even if the positioning bolt 2 is loose, the sealing gasket 22 and the tightening block 21 can still seal the liquid injection port 11, which is beneficial to improving the sealing effect of the liquid injection port 11.

[0034] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealed capacitor end cap, characterized in that: The invention comprises a cover plate body (1) and a positioning bolt (2), wherein a liquid injection port (11) is provided on the cover plate body (1), the positioning bolt (2) is threadedly connected to the inner wall of the liquid injection port (11), a tightening block (21) is rotatably connected to the positioning bolt (2), a plurality of elastic sealing components (3) are provided on the cover plate body (1), the plurality of elastic sealing components (3) are arranged around the liquid injection port (11), the projection of the elastic sealing component (3) in the direction of the central axis of the liquid injection port (11) is located inside the liquid injection port (11), the tightening block (21) extends between the plurality of elastic sealing components (3), the tightening block (21) is used to tighten the plurality of elastic sealing components (3) so that the elastic sealing component (3) presses against the inner wall of the capacitor, and a sealing gasket (22) is provided on the positioning bolt (2), and the sealing gasket (22) presses against the inner wall of the liquid injection port (11).

2. The sealed capacitor end cap according to claim 1, characterized in that: An anti-overflow opening (211) is provided at one end of the pressing block (21) away from the positioning bolt (2).

3. The sealed capacitor end cap according to claim 2, characterized in that: The elastic sealing assembly (3) is provided with a guide surface (33), the guide surface (33) being inclined from a direction away from the cover plate body (1) toward a direction close to the central axis of the liquid injection port (11), and the guide surface (33) abuts against the abutting block (21).

4. The sealed capacitor end cap according to claim 3, wherein: A plurality of anti-slip grooves (212) are provided on the outer peripheral wall of the pressing block (21).

5. The sealed capacitor end cap according to claim 4, characterized in that: The anti-slip grooves (212) are arranged around the outer periphery of the liquid injection port (11), and the distribution direction of a plurality of the anti-slip grooves (212) is parallel to the central axis of the liquid injection port (11).

6. The sealed capacitor end cap according to claim 1, characterized in that: A plurality of heat dissipation fins (12) are provided on the cover body (1), and the heat dissipation fins (12) are located on a side of the cover body (1) away from the elastic sealing component (3).

7. The sealed capacitor end cap according to claim 6, characterized in that: The heat dissipation fins (12) and the cover plate are spliced ​​to form a guide groove (13), and the guide groove (13) is communicated with the liquid injection port (11).

8. The sealed capacitor end cap according to claim 1, characterized in that: One end of the cover plate body (1) away from the elastic sealing component (3) is arranged to be gradually contracted in a direction close to the liquid injection port (11).

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