Capacitor electrode sealing structure

Abstract

The invention discloses a capacitor electrode sealing structure, and relates to the technical field of electrode sealing, the capacitor electrode sealing structure comprises a capacitor plastic shell, a mounting hole site and an electrode main body, and further comprises a closed efficiency improving mechanism, the efficiency improving mechanism is mainly composed of a sealing ring and a plastic positioning part, and the outer wall of the top of the electrode main body is circumferentially provided with a mounting ring groove in a surrounding manner; the sealing ring is embedded in the mounting ring groove and abuts against the inner wall of the capacitor plastic shell, and the plastic positioning part is arranged in the contraction groove; according to the invention, through the arrangement of the closed efficiency-improving mechanism, before the electrode main body penetrates into the mounting hole site, the sealing ring is embedded into the mounting ring groove in advance by means of the sealing ring in the closed efficiency-improving mechanism, and after the electrode main body completely penetrates into the mounting hole site, the sealing ring is extruded and tightly attached to the inner wall of the bottom end of the plastic shell of the capacitor and generates a certain degree of deformation; the compression effect can significantly enhance the sealing performance, and ensures that the sealing effect between the capacitor plastic shell and the electrode main body reaches the design standard.

Description

Technical Field

[0001] The present invention relates to the technical field of electrode sealing, and specifically relates to a capacitor electrode sealing structure. Background Art

[0002] In the past, the improvement of the sealing performance of capacitors mainly relied on the precise fit between the plastic shell and the electrodes. However, this method has extremely high requirements for the processing accuracy of the fittings. It not only requires operators to have a high skill level, but also it is often difficult to achieve an absolutely perfect fit during the fitting process. In addition, due to the relatively large overall height of the product design, this directly leads to an increase in the liquid level of the potting material, thereby exerting a huge pressure on the electrodes at the bottom. In such a high-pressure environment, the potting material is very likely to leak. Once leakage occurs, a large amount of manual labor is required for repair, which not only increases the production cost but also seriously reduces the production efficiency. Summary of the Invention

[0003] In order to solve the above technical problems, a capacitor electrode sealing structure is provided, which solves the problems described in the background art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A capacitor electrode sealing structure includes a capacitor plastic shell, a mounting hole position opened at the bottom of the capacitor plastic shell, and an electrode body passing through the mounting hole position, and further includes a sealing and efficiency-improving mechanism for improving the sealing performance inside the capacitor plastic shell;

[0005] The sealing and efficiency-improving mechanism is mainly composed of a sealing ring and a plastic positioning part. An installation ring groove is circumferentially formed around the outer wall of the top of the electrode body. The sealing ring is embedded in the installation ring groove and abuts against the inner wall of the capacitor plastic shell. A shrinkage groove is formed on the outer wall of the electrode body below the capacitor plastic shell, and the plastic positioning part is located in the shrinkage groove;

[0006] The plastic positioning part is mainly composed of an elastic clamping member and a shrinkage traction member.

[0007] Preferably, the elastic clamping member includes a positioning piece inclined at the open end of the shrinkage groove. The upper inclined end of the positioning piece abuts against the bottom surface of the capacitor plastic shell, and a plastic bending piece is fixed between the lower inclined end of the positioning piece and the inner wall of the bottom end of the shrinkage groove.

[0008] Preferably, a support block is further fixed on the inner wall at the open end of the shrinkage groove and is closely attached to the outer side surface of the plastic bending piece.

[0009] Preferably, the contraction traction member includes a rotating sleeve rotatable on the outer periphery of the bottom end of the electrode body, a movable plate vertically fixed on the inner wall of the rotating sleeve, and a pull rope fixed on the movable plate, the end of the pull rope is inserted into the contraction groove and fixedly connected to the positioning plate, and a paddle is also fixed on the inner wall of the rotating sleeve.

[0010] Preferably, a fixing tube is fixedly passed through the inner wall of the paddle, a telescopic rod is elastically slidable in the fixing tube, a positioning ball that abuts against the bottom surface of the electrode body is fixed to one end of the telescopic rod, and the other end of the telescopic rod passes through the fixing tube, and a positioning groove that matches the positioning ball is also provided on the bottom surface of the electrode body, and the positioning groove and the positioning ball are on the same circumference.

[0011] Preferably, a fixing sleeve in an annular shape and fixedly connected to the bottom surface of the electrode body is further provided on the inner side of the operating sleeve, a torsion spring is provided on the outer side of the fixing sleeve, and two ends of the torsion spring are respectively fixedly connected to the operating sleeve and the fixing sleeve correspondingly.

[0012] Preferably, a turning head fixedly connected to the inner side wall of the shrinkage groove is provided on the body of the pull rope, and the turning head distributes the pull rope into an L shape.

[0013] Preferably, an annular sliding groove is provided on the outer periphery of the bottom end of the electrode body, and a sliding ring fixedly connected to the top end of the operating sleeve slides in the annular sliding groove.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) By setting up the closed efficiency-enhancing mechanism, before the electrode body is inserted into the installation hole, the sealing ring in the closed efficiency-enhancing mechanism is pre-embedded into the installation ring groove. When the electrode body is completely inserted into the installation hole, the sealing ring will be squeezed and closely fit the inner wall of the bottom end of the capacitor plastic shell, and produce a certain degree of deformation. This compression effect can significantly enhance the sealing performance and ensure that the sealing effect between the capacitor plastic shell and the electrode body meets the design standard.

[0016] (2) By setting the elastic clamp, when the electrode body is about to be inserted into the installation hole, the positioning piece will be in advance against the inner wall of the installation hole. As the electrode body is gradually inserted, the positioning piece rotates toward the inside of the shrinkage groove with the plastic bend as the center, and at the same time, the plastic bend is folded, so that the electrode body can be pushed into the installation hole more smoothly. When the electrode body is finally inserted into place, the positioning piece is separated from the squeezing environment of the inner wall of the installation hole, and the squeezing force it is subjected to disappears. The positioning piece will return to its initial state and contact the bottom surface of the capacitor plastic shell, thereby positioning the electrode body to better maintain the deformation degree of the sealing ring.

[0017] (3) By setting the support block, the folding of the plastic bend can be limited to a certain extent, and the expansion of the positioning piece to the side away from the electrode body can be limited, so as to prevent the electrode body from rising under the elastic force of the sealing ring after the positioning piece abuts the capacitor plastic shell, causing the positioning piece to expand outward, resulting in the relaxation of the compression effect of the sealing ring, and reducing the sealing effect between the capacitor plastic shell and the electrode body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the bottom structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle;

[0022] Figure 5 It is a schematic diagram of the internal structure of the fixed cylinder of the present invention.

[0023] The numbers in the figure are:

[0024] 1. Capacitor plastic shell; 2. Electrode body; 3. Mounting ring groove; 4. Sealing ring; 5. Shrinkage groove; 6. Positioning piece; 7. Shaping crook; 8. Support block; 9. Pull rope; 10. Turning head; 11. Operating sleeve; 12. Sliding ring; 13. Movable piece; 14. Fixed sleeve; 15. Torsion spring; 16. Pick; 17. Fixed cylinder; 18. Telescopic rod; 19. Positioning ball; 20. Movable ring; 21. Compression spring; 22. Positioning groove. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] Reference Figures 1-5 As shown, a capacitor electrode sealing structure comprises a capacitor plastic shell 1, a mounting hole opened at the bottom of the capacitor plastic shell 1, and an electrode body 2 inserted into the mounting hole;

[0027] The electrode body 2 is inserted into the installation hole to block the installation hole and seal the interior of the capacitor plastic shell 1 .

[0028] However, this sealing method mainly relies on the precise fit between the plastic shell 1 of the capacitor and the electrode body 2. However, this method has extremely high requirements for the processing accuracy of the parts. Not only does it require the operator to have a high skill level, but it is often difficult to achieve absolute tightness during the fitting process. In addition, due to the relatively large height of the overall product design, this directly leads to an increase in the liquid level of the potting material, which in turn exerts a huge pressure on the electrode body 2 at the bottom. In this high-pressure environment, the potting material is very likely to leak. Once leakage occurs, a large amount of manual labor is required for repair, which not only increases the production cost but also seriously reduces the production efficiency;

[0029] In view of this, referring to Figures 1-4 as shown, it is worth noting that it also includes a sealing and efficiency-enhancing mechanism for improving the internal sealing performance of the plastic shell 1 of the capacitor;

[0030] The sealing and efficiency-enhancing mechanism mainly consists of a sealing ring 4 and a plastic positioning part. An installation ring groove 3 is circumferentially formed on the outer wall of the top of the electrode body 2, and the sealing ring 4 is embedded in the installation ring groove 3 and abuts against the inner wall of the plastic shell 1 of the capacitor;

[0031] Through the setting of the sealing and efficiency-enhancing mechanism, before the electrode body 2 penetrates into the installation hole position, with the help of the sealing ring 4 in the sealing and efficiency-enhancing mechanism, it is pre-embedded in the installation ring groove 3. Then, when the electrode body 2 completely penetrates into the installation hole position, the sealing ring 4 will be squeezed, closely fitting the inner wall of the bottom end of the plastic shell 1 of the capacitor and generating a certain degree of deformation. This compression effect can significantly enhance the sealing performance and ensure that the sealing effect between the plastic shell 1 of the capacitor and the electrode body 2 meets the design standard.

[0032] Furthermore, referring to Figure 4 as shown, it is worth noting that a shrinkage groove 5 is formed on the outer wall of the electrode body 2 below the plastic shell 1 of the capacitor, and the plastic positioning part is located in the shrinkage groove 5;

[0033] The plastic positioning part mainly consists of an elastic clamping part and a shrinkage traction part;

[0034] Among them, the elastic clamping part includes a positioning piece 6 located obliquely at the opening of the shrinkage groove 5. The upper oblique end of the positioning piece 6 abuts against the bottom surface of the plastic shell 1 of the capacitor, and a plastic bending piece 7 is fixed between the lower oblique end of the positioning piece 6 and the inner wall of the bottom end of the shrinkage groove 5;

[0035] By setting the elastic clamp, when the electrode body 2 is to be inserted into the installation hole, the positioning piece 6 will abut against the inner wall of the installation hole in advance. As the electrode body 2 is gradually inserted, the positioning piece 6 is subjected to the continuously increasing extrusion force from the inner wall of the installation hole. Under the action of this extrusion force, the positioning piece 6 rotates toward the inside of the contraction groove 5 with the plastic bend 7 as the center, and at the same time, the plastic bend 7 is folded. This series of actions effectively reduces the obstacles to the insertion process of the electrode body 2, so that the electrode body 2 can be pushed into the installation hole relatively smoothly.

[0036] When the electrode body 2 is finally inserted into place, the positioning piece 6 also synchronously completes the action of penetrating the inside of the installation hole. At this time, the positioning piece 6 is separated from the extrusion environment of the inner wall of the installation hole, and the extrusion force it is subjected to disappears. The positioning piece 6 will return to its initial state and contact the bottom surface of the capacitor plastic shell 1, thereby positioning the electrode body 2 to better maintain the deformation degree of the sealing ring 4.

[0037] Further, refer to Figure 4 As shown, it is worth noting that a support block 8 is fixed on the inner wall of the opening of the shrinkage groove 5 and is in close contact with the outer side surface of the shaping crooked member 7;

[0038] By setting the support block 8, the plastic bend 7 can be limited to a certain extent from folding outward and the positioning piece 6 can be limited from expanding toward the side away from the electrode body 2, so as to prevent the electrode body 2 from rising under the elastic force of the sealing ring 4 after the positioning piece 6 abuts against the capacitor plastic shell 1, causing the positioning piece 6 to expand outward, resulting in the relaxation of the compression effect of the sealing ring 4, and reducing the sealing effect between the capacitor plastic shell 1 and the electrode body 2.

[0039] Further, refer to Figure 4 As shown, it is worth noting that the contraction traction member includes a rotating sleeve 11 rotatable on the outer periphery of the bottom end of the electrode body 2, a movable sheet 13 vertically fixed on the inner wall of the rotating sleeve 11, and a pull rope 9 fixed on the movable sheet 13, the end of the pull rope 9 is inserted into the contraction groove 5 and fixedly connected to the positioning sheet 6, and a paddle 16 is also fixed on the inner wall of the rotating sleeve 11;

[0040] By turning the paddle 16, the knob-operated sleeve 11 can be turned, and the active sheet 13 pulls the positioning sheet 6 by the pull rope 9 during the turnover process, so that the positioning sheet 6 is passively forced to shrink toward the inside of the shrinkage groove 5, so as to quickly release the restriction effect of the positioning sheet 6 on the electrode body 2, making it convenient for manual disassembly of the electrode body 2 later.

[0041] Further, refer to Figure 2 and Figure 5As shown, it is worth noting that a fixed cylinder 17 is fixedly penetrated through the inner wall of the paddle 16. An expansion rod 18 elastically slides within the fixed cylinder 17. One end of the expansion rod 18 is fixed with a positioning ball 19 that abuts against the bottom surface of the electrode body 2. The other end of the expansion rod 18 passes through the fixed cylinder 17 and is fixed with a circular lifting block. A positioning groove 22 adapted to the positioning ball 19 is also formed on the bottom surface of the electrode body 2. The positioning groove 22 and the positioning ball 19 are on the same circumference;

[0042] A compression spring 21 is sleeved on the rod body of the expansion rod 18. One end of the compression spring 21 is fixedly connected to the inner wall of the fixed cylinder 17. The other end of the compression spring 21 is fixed with an annular movable ring 20, and the movable ring 20 is tightly sleeved on the rod body of the expansion rod 18;

[0043] When the paddle 16 is toggled to rotate the operating sleeve 11 to pull the positioning piece 6, the positioning ball 19 can rotate synchronously with the paddle 16 until the positioning ball 19 moves to a position corresponding to the positioning groove 22. Then, under the elastic force of the compression spring 21, the expansion rod 18 acts on the positioning ball 19 to embed it into the inner side of the positioning groove 22, locking the pulling force of the pull rope 9 on the positioning piece 6 by the paddle 16 and the operating sleeve 11 as a whole, so that the positioning piece 6 is stably received inside the contraction groove 5, preventing the positioning piece 6 from interfering with the disassembly process of the electrode body 2 due to the elastic reset of the shaping elbow 7 during the disassembly of the electrode body 2.

[0044] Furthermore, referring to Figure 4 As shown, it is worth noting that a fixed sleeve 14 in the shape of a circular ring and fixedly connected to the bottom surface of the electrode body 2 is also provided inside the operating sleeve 11. A torsion spring 15 is sleeved outside the fixed sleeve 14, and the two ends of the torsion spring 15 are fixedly connected to the operating sleeve 11 and the fixed sleeve 14 respectively;

[0045] When the operating sleeve 11 is rotated, the operating sleeve 11 can synchronously twist the torsion spring 15 to deform. In this way, using the elastic force of the torsion spring 15, after the disassembly of the electrode body 2 is completed, the expansion rod 18 is pulled to make the positioning ball 19 withdraw from the positioning groove 22. After releasing the fixing effect of the paddle 16 and the operating sleeve 11, the operating sleeve 11 can quickly rotate back under the elastic force of the torsion spring 15, loosening the pulling on the pull rope 9 and the positioning piece 6, so that the positioning piece 6 quickly resets.

[0046] Furthermore, referring to Figure 4 As shown, it is worth noting that a turning head 10 fixedly connected to the inner side wall of the contraction groove 5 is sleeved on the wire body of the pull rope 9, and the turning head 10 distributes the pull rope 9 into an L shape;

[0047] Through the setting of the turning head 10, the pull rope 9 can be very effectively distributed in an L shape inside the contraction groove 5, making the pull rope 9 horizontally pull the positioning piece 6 and vertically pass through and contract the inner wall of the electrode body 2, thereby reducing the wear of the pull rope 9 to a certain extent.

[0048] Furthermore, referring toFigure 4 As shown, it is worth noting that an annular chute is provided on the outer periphery of the bottom end of the electrode body 2, and a sliding ring 12 fixedly connected to the top end of the operating sleeve 11 slides in the annular chute;

[0049] By rotating the operating sleeve 11, the sliding ring 12 can rotate in the annular chute. In this way, the sliding ring 12 cooperating with the annular chute can effectively limit the rotation trajectory of the operating sleeve 11.

[0050] The foregoing shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A capacitor electrode sealing structure, comprising a capacitor plastic shell (1), a mounting hole opened at the bottom of the capacitor plastic shell (1), and an electrode body (2) inserted into the mounting hole, characterized in that: It also includes a sealing efficiency-enhancing mechanism for improving the sealing performance inside the capacitor plastic shell (1); The closed efficiency-enhancing mechanism is mainly composed of a sealing ring (4) and a plastic positioning portion. The outer wall of the top of the electrode body (2) is provided with a mounting ring groove (3) in a circumferential direction. The sealing ring (4) is embedded in the mounting ring groove (3) and abuts against the inner wall of the capacitor plastic shell (1). The outer wall of the electrode body (2) located below the capacitor plastic shell (1) is provided with a shrinkage groove (5), and the plastic positioning portion is located in the shrinkage groove (5). The plastic positioning part is mainly composed of an elastic clamping piece and a contraction traction piece.

2. A capacitor electrode sealing structure according to claim 1, characterized in that: The elastic clamp comprises a positioning piece (6) which is located at an opening of the shrinkage groove (5) in an inclined shape, the upper inclined end of the positioning piece (6) abuts against the bottom surface of the capacitor plastic shell (1), and a plastic bend (7) is fixed between the lower inclined end of the positioning piece (6) and the inner wall of the bottom end of the shrinkage groove (5).

3. A capacitor electrode sealing structure according to claim 2, characterized in that: A support block (8) is also fixed on the inner wall of the open portion of the shrinkage groove (5) and is in close contact with the outer side surface of the shaping crooked member (7).

4. A capacitor electrode sealing structure according to claim 2, characterized in that: The contraction traction member comprises a rotating sleeve (11) rotatable on the outer periphery of the bottom end of the electrode body (2), a movable sheet (13) vertically fixed on the inner wall of the rotating sleeve (11), and a pull rope (9) fixed on the movable sheet (13), the end of the pull rope (9) passing through the contraction groove (5) and fixedly connected to the positioning sheet (6), and a paddle (16) is also fixed on the inner wall of the rotating sleeve (11).

5. A capacitor electrode sealing structure according to claim 4, characterized in that: A fixing tube (17) is fixedly passed through the inner wall of the paddle (16), a telescopic rod (18) is elastically slidable in the fixing tube (17), a positioning ball (19) abutting against the bottom surface of the electrode body (2) is fixed to one end of the telescopic rod (18), the other end of the telescopic rod (18) passes through the fixing tube (17), and a positioning groove (22) adapted to the positioning ball (19) is also formed on the bottom surface of the electrode body (2), and the positioning groove (22) and the positioning ball (19) are on the same circumference.

6. A capacitor electrode sealing structure according to claim 5, characterized in that: A fixing sleeve (14) in the form of an annular ring and fixedly connected to the bottom surface of the electrode body (2) is also provided on the inner side of the operating sleeve (11), and a torsion spring (15) is provided on the outer cover of the fixing sleeve (14), and the two ends of the torsion spring (15) are respectively fixedly connected to the operating sleeve (11) and the fixing sleeve (14) correspondingly.

7. A capacitor electrode sealing structure according to claim 4, characterized in that: The body of the pull rope (9) is provided with a turning head (10) fixedly connected to the inner wall of the shrinkage groove (5), and the turning head (10) distributes the pull rope (9) into an L shape.

8. The capacitor electrode sealing structure according to claim 4, characterized in that: An annular sliding groove is provided on the outer periphery of the bottom end of the electrode body (2), and a sliding ring (12) fixedly connected to the top end of the operating sleeve (11) slides in the annular sliding groove.

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