Capacitor shielding structure and solid-sealed polar pole

Abstract

The utility model relates to the electrical field, and provides a shielding structure of a capacitor and a solid-sealed polar pole, the shielding structure of the capacitor comprises a first shielding net, a second shielding net, a joint shielding net and a signal line shielding tube, the first shielding net is arranged at one end of the capacitor, and the first shielding net is provided with a first shielding end; the second shielding net and the first shielding net are oppositely arranged at the other end of the capacitor, and the second shielding net is provided with a second shielding end. The first shielding net and the second shielding net are oppositely installed at the two ends of the capacitor to form shielding of the two end portions, and cover shielding of the end portions of the capacitor is formed through the shielding ends so as to ensure the shielding range. Meanwhile, the position of the output end of the capacitor is shielded through the connector shielding net, and the output signal line is sleeved through the signal line shielding tube, so that the problem of signal transmission is solved, normal operation of the capacitor is guaranteed, and the stability and reliability of use are improved.

Description

Technical Field

[0001] The utility model relates to the field of electricity, and particularly relates to a shielding structure of a capacitor and a solid-sealed pole column. Background Art

[0002] With the increasing development demand of the smart grid, the role of capacitors in medium and high voltage switchgear has become more prominent. The internal structure of capacitor devices is relatively mature. However, when applied to solid-sealed pole columns, it needs to cooperate with other components inside the solid-sealed pole column, and at the same time meet our requirements for the electrical and capacitor signal transmission of the solid-sealed pole column. Therefore, corresponding improvements need to be made to the capacitor part to meet the usage requirements. If the cooperation between the capacitor and other components inside the solid-sealed pole column is unreasonable, problems such as electrical and signal transmission problems are likely to occur, such as breakdown, partial discharge, signal transmission interference, etc., affecting the normal use of power equipment.

[0003] In the solid-sealed pole column, since one end of the capacitor is connected to high voltage and the other end is low voltage, the capacitor has to bear a relatively high voltage. If there are defects such as sharp edges and corners at the end of the capacitor, it is extremely easy to cause breakdown of the withstand voltage, and the weld at the end of the capacitor is likely to cause partial discharge problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a shielding structure of a capacitor and a solid-sealed pole column, aiming to improve the problems that are likely to occur in the electrical or signal transmission during the use of capacitors in solid-sealed pole columns.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A shielding structure of a capacitor, comprising:

[0006] A first shielding net, which is arranged at one end of the capacitor, and the first shielding net is provided with a first shielding end that bends and extends towards the capacitor;

[0007] A second shielding net, which is arranged at the other end of the capacitor opposite to the first shielding net, and the second shielding net is provided with a second shielding end that bends and extends towards the capacitor;

[0008] A joint shielding net, which is arranged at the wiring position of the output end of the capacitor; and

[0009] A signal line shielding tube, which is sleeved on the output signal line of the capacitor.

[0010] Preferably, the joint shielding net is of a U-shaped cup structure, and the opening direction of the joint shielding net is set to be away from the capacitor.

[0011] Preferably, a first gap is provided between the first shielding net and the capacitor; a second gap is provided between the second shielding net and the capacitor.

[0012] Preferably, a spacer for forming the first gap is provided between the first shielding net and the capacitor, and a locking nut for fixing the first shielding net in alignment and cooperation with the spacer;

[0013] The second shielding net has the same structure as the first shielding net.

[0014] Preferably, a silica gel plug is provided on the joint shielding net for clamping and fixing itself on the locking nut of the second shielding net.

[0015] Preferably, the first shielding net and the second shielding net are shielding nets with a porous mesh structure made of brass.

[0016] A solid-sealed pole column is further provided, including the shielding structure of the capacitor as described above.

[0017] After adopting the above technical solution, compared with the background technology, the present utility model has the following advantages:

[0018] 1. The first shielding net and the second shielding net are oppositely installed at both ends of the capacitor to form shielding for both ends, and the shielding at the ends forms covering shielding for the ends of the capacitor to ensure the shielding range. At the same time, the position of the output end of the capacitor is shielded by the joint shielding net, and the output signal wire is sleeved by the signal wire shielding tube to eliminate signal transmission problems, ensure the normal operation of the capacitor, and improve the stability and reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the shielding structure of the capacitor described in the present utility model.

[0020] Description of the reference numerals:

[0021] 1. Capacitor; 2. Spacer;

[0022] 10. First shielding net; 101. First shielding end; 102. First gap;

[0023] 20. Second shielding net; 201. Second shielding end; 202. Second gap;

[0024] 30. Joint shielding net; 301. Silica gel plug;

[0025] 40. Signal wire shielding tube;

[0026] 50. Locking nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] In addition, it should be noted that: the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element of the present utility model must have a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0029] When an element is referred to as "fixed to" or "arranged on" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific situations.

[0031] Embodiment 1

[0032] Please refer to Figure 1 As shown, this embodiment provides a shielding structure for a capacitor 1, including a first shielding net 10, a second shielding net 20, a joint shielding net 30 and a signal line shielding tube 40. The first shielding net 10 is arranged at one end of the capacitor 1, and the first shielding net 10 is provided with a first shielding end 101 that bends and extends towards the capacitor 1; the second shielding net 20 is arranged opposite to the first shielding net 10 at the other end of the capacitor 1, and the second shielding net 20 is provided with a second shielding end 201 that bends and extends towards the capacitor 1; the joint shielding net 30 is arranged at the wiring of the output end of the capacitor 1; the signal line shielding tube 40 is sleeved on the output signal line of the capacitor 1.

[0033] Specifically, the first shielding net 10, the second shielding net 20, and the joint shielding net 30 can be shielding nets with a porous mesh structure made of brass. The brass material has good ductility, and the design of the mesh structure is beneficial to the shrinkage of the epoxy resin material after molding for the solid-sealed pole column, and is more conducive to the fluidity during the pouring of the epoxy resin material, so as to exhaust air inside the mold during pouring, avoid the generation of bubbles, and at the same time avoid the electric field concentration at the end of the capacitor 1, achieve the balanced electric field distribution with surrounding components, avoid breakdown and partial discharge, and improve the practicability and reliability of use.

[0034] During use, the first shielding net 10 is installed at the inlet end of the capacitor 1, and the second shielding net 20 is installed at the outlet end of the capacitor 1, and combined with the design of the shielding end, the purpose of shielding both ends of the capacitor 1 is achieved. At the same time, the joint shielding net 30 is installed at the lead-out end of the capacitor 1. Since the lead-out end needs to connect a signal wire, shielding is required through the joint shielding net 30 at the wiring position. Subsequently, for the connected signal wire, the signal wire shielding tube 40 is sleeved for shielding. In this way, the joint shielding net 30 and the signal wire shielding tube 40 are connected to form a sharp-corner discharge between the shielding capacitor 1 signal wire joint and the end of the shielding tube, avoiding the adverse effect of the sharp corner on the electrical properties of the product.

[0035] Furthermore, as Figure 1 shown, in this embodiment, a silica gel plug 301 for clamping and fixing itself to the locking nut 50 of the second shielding net 20 is provided on the joint shielding net 30. That is, after the signal wire at the lower end of the capacitor 1 passes through the signal wire shielding tube 40 and is led out, by adding the silica gel plug 301 at the end of the signal wire shielding tube 40, the overflow of the epoxy resin material during pouring can be prevented. During use, the signal wire shielding tube 40 is grounded, thereby shielding external interference to the signal wire of the capacitor 1, promoting the smooth transmission of the signal, and improving the reliability of use.

[0036] In this embodiment, the joint shielding net 30 has a U-shaped cup structure, and the opening direction of the joint shielding net 30 is set to be away from the capacitor 1. The U-shaped cup structure design can form a covering shield, increase the protection range, and achieve a reliable protection purpose.

[0037] As Figure 1 shown, in this embodiment, a first gap 102 is provided between the first shielding net 10 and the capacitor 1; a second gap 202 is provided between the second shielding net 20 and the capacitor 1. The design of the gap can pour epoxy resin between the shielding net and the capacitor 1 to form a stable positioning and installation effect, improving the structural stability. Moreover, the brass material porous mesh structure shielding net can ensure the fluidity of the capacitor 1 during the pouring of the solid-sealed pole column epoxy resin material, avoid the generation of bubbles in the gap, and improve the reliability of the capacitor 1 in use.

[0038] AsFigure 1 As shown, in this embodiment, a spacer 2 for forming a first gap 102 is provided between the first shielding net 10 and the capacitor 1, and a locking nut 50 is provided for aligning and cooperating with the spacer 2 to fix the first shielding net 10; the second shielding net 20 has the same structure as the first shielding net 10. Since the shielding net is an assembly structure, in order to prevent the shielding net from deviating during use, the shielding net is fixed by a locking nut 50 (i.e., a nut, and two nuts or a stop washer can be used as required to improve the locking force), so as to ensure the reliable contact of the shielding net, more effectively guarantee the electrical performance of the product, and improve the practicality.

[0039] Embodiment 2

[0040] The present embodiment provides a solid-sealed pole, including a shielding structure of a capacitor as described in the first embodiment. Through the shielding structure of the capacitor, it is possible to form an integral part with the shielding structure of the capacitor by pouring epoxy resin. Because the brass material has good ductility, and the design of the mesh structure is conducive to the shrinkage of the epoxy resin material for making the solid-sealed pole after molding, and is more conducive to the fluidity of the epoxy resin material during pouring, so as to facilitate the exhaust of the mold during pouring, avoid the generation of bubbles, and avoid the concentration of the electric field at the end of the capacitor. In addition, through the design of the shielding mesh structure, breakdown or local discharge can be eliminated, and the electric field distribution of the surrounding components can be balanced, thereby improving the reliability of the use of the solid-sealed pole.

[0041] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A shielding structure of a capacitor (1), characterized in that, include: A first shielding net (10) is arranged at one end of the capacitor (1), and the first shielding net (10) is provided with a first shielding end (101) bent and extended toward the capacitor (1); A second shielding net (20) arranged at the other end of the capacitor (1) opposite to the first shielding net (10), and the second shielding net (20) is provided with a second shielding end (201) bent and extending toward the capacitor (1); A connector shielding net (30) arranged at the connection point of the output end of the capacitor (1); and A signal line shielding tube (40) is sleeved on the output signal line of the capacitor (1).

2. The shielding structure of the capacitor (1) according to claim 1, characterized in that: The connector shielding net (30) is a U-shaped cup structure, and the opening of the connector shielding net (30) is arranged in a direction away from the capacitor (1).

3. The shielding structure of the capacitor (1) according to claim 1, characterized in that: A first gap (102) is provided between the first shielding net (10) and the capacitor (1); and a second gap (202) is provided between the second shielding net (20) and the capacitor (1).

4. The shielding structure of the capacitor (1) according to claim 3, characterized in that: A pad (2) for forming the first gap (102) and a locking nut (50) for aligning with the pad (2) and fixing the first shielding net (10) are provided between the first shielding net (10) and the capacitor (1); The second shielding net (20) has the same structural arrangement as the first shielding net (10).

5. The shielding structure of the capacitor (1) according to claim 3, characterized in that: The joint shielding net (30) is provided with a silicone plug (301) on a locking nut (50) which clamps and fixes the joint shielding net (30) to the second shielding net (20).

6. The shielding structure of the capacitor (1) according to claim 1, characterized in that: The first shielding net (10) and the second shielding net (20) are shielding nets with a porous mesh structure made of brass.

7. A cast resin dry-type bushing, characterized in that, A shielding structure comprising a capacitor as claimed in any one of claims 1 to 6.

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