Static contact radiator for isolating switch of high-current C-GIS (Gas Insulated Switchgear) equipment

Abstract

A static contact radiator used for a large-current C-GIS equipment isolation switch comprises a three-station isolation switch arranged in C-GIS equipment, the three-station isolation switch is provided with an execution mechanism, a moving contact driven by the execution mechanism and a static contact matched with the moving contact, the upper portion of the static contact is fixedly connected with a bus, the rear portion of the static contact is connected with an insulator through a bolt, and the three-station isolation switch is connected with the insulator through a bolt. The insulator is fixed in a gas tank of the C-GIS equipment through a support arm, a static contact radiator is arranged between the static contact and the insulator, the static contact radiator comprises a radiator body with a through hole in the middle, umbrella skirt-shaped radiating fins are annularly arranged on the periphery of the radiator body at intervals, and radiating holes are formed in the radiator body and the umbrella skirt-shaped radiating fins; according to the static contact radiator provided by the utility model, high temperature concentrated at the connecting part of the moving contact and the static contact of the three-station isolating switch can be quickly radiated into the air box, so that the temperature of the connecting part of the moving contact and the static contact is effectively reduced, and the safe and stable operation of the three-station isolating switch is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical equipment and relates to a static contact radiator for a large current C-GIS equipment isolating switch. Background Art

[0002] Gas-insulated metal-enclosed switchgear is referred to as gas-filled high-voltage switchgear (C-GIS). It uses SF6 gas or other gases as the insulating medium. The primary components such as circuit breakers, three-position disconnectors and busbars are sealed in a low-pressure stainless steel gas box. It has the characteristics of small size and is not affected by the external environment. It is widely used in high-altitude and high-pollution occasions.

[0003] Since the primary main circuit of the inflatable cabinet is sealed in the inflatable box, compared with ordinary switch cabinets, the energy is too concentrated and the heat dissipation environment is poor during operation, which will cause excessive temperature rise, accelerate component aging, and reduce the insulation performance of the product, thereby affecting the safe and stable operation of the equipment. For large-current inflatable high-voltage switch cabinets, the temperature rise problem is more prominent.

[0004] The highest point of temperature rise of high-current C-GIS equipment is mostly concentrated at the connection part of the moving contact and the static contact of the three-position disconnector. It can be seen that if a heat sink can be installed on the moving contact and the static contact or the static contact, the problem of high temperature at the connection part of the moving contact and the static contact can be effectively solved. It is under this background that the utility model proposes a static contact heat sink specially used for high-current C-GIS equipment disconnector. Utility Model Content

[0005] The utility model aims to provide a static contact heat sink for a high-current C-GIS equipment disconnector, which effectively solves the technical problem of high temperature at the connection part between the moving contact and the static contact of the three-position disconnector of the high-current C-GIS equipment.

[0006] The technical solution of the utility model is:

[0007] A static contact heat sink for a high-current C-GIS equipment disconnector comprises a three-position disconnector arranged in the C-GIS equipment, wherein the three-position disconnector has an actuator, a moving contact driven by the actuator, and a static contact matched with the moving contact, wherein the upper portion of the static contact is fixedly connected to a busbar, and the rear portion is connected to an insulator by bolts, and the insulator is fixed in an air box of the C-GIS equipment by a support arm, and a static contact heat sink is arranged between the static contact and the insulator, and the static contact heat sink comprises a heat sink body with a through hole in the middle, and an umbrella-shaped heat sink is arranged on the outer peripheral spacer ring of the heat sink body, and heat dissipation holes are opened on the heat sink body and the umbrella-shaped heat sink.

[0008] Furthermore, one end of the heat sink body in contact with the static contact is coated with a thermal conductive silicone grease layer.

[0009] Furthermore, the outer surfaces of the radiator body and the umbrella-shaped radiating fins are coated with a heat dissipation paint layer.

[0010] Furthermore, the radiator body and the umbrella-shaped radiating fins are an integrally formed structure.

[0011] Furthermore, the heat dissipation holes are evenly distributed on the radiator body and the umbrella-shaped heat dissipation fins.

[0012] Furthermore, the bolt passes through the through hole to connect the static contact heat sink between the static contact and the insulator.

[0013] The utility model adopting the above technical solution can achieve the following effects:

[0014] Through the static contact heat sink provided by the utility model, the high temperature concentrated at the connection part of the moving contact and the static contact of the three-position disconnector can be quickly dissipated into the air box, effectively reducing the temperature of the connection part of the moving contact and the static contact, and ensuring the safe and stable operation of the three-position disconnector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the position relationship of the utility model in a high current C-GIS device;

[0016] Figure 2 It is a side view of the utility model;

[0017] Figure 3 for Figure 2 Cross-sectional view of section AA.

[0018] In the figure, 1-high current C-GIS equipment; 2-three-position disconnector; 3-busbar; 4-insulator; 5-support arm; 6-static contact radiator; 21-actuator; 22-moving contact; 23-static contact; 61-radiator body; 62-umbrella-shaped heat sink. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 3As shown, a static contact heat sink for a high-current C-GIS equipment disconnector comprises a three-position disconnector 2 arranged in a high-current C-GIS equipment 1, wherein the three-position disconnector 2 comprises an actuator 21, a moving contact 22 driven by the actuator 21, and a static contact 23 matched with the moving contact 22, wherein the upper portion of the static contact 23 is fixedly connected to the busbar 3, and the lower portion is connected to the insulator 4 by bolts, and the insulator 4 is fixed in the air box of the high-current C-GIS equipment 1 by a support arm 5. Different from the prior art, the utility model is provided with a static contact heat sink 6 between the static contact 23 and the insulator 4, and the rest of the structure and layout are exactly the same as those of the prior art. This arrangement is to retain the original structural layout of the high-current C-GIS device 1 to the greatest extent, so as to facilitate the transformation of the existing high-current C-GIS device 1. During the transformation, it is only necessary to move the position of the support arm 5. If the static contact heat sink 6 is set on the side of the moving contact 22, not only the structure on the side of the moving contact 22 needs to be changed, but also because the static contact heat sink 6 is added on the side of the moving contact 22, which is equivalent to the moving contact 22 being partially lengthened, it is also necessary to adjust the position of the static contact 23 to ensure the matching relationship between the moving contact 22 and the static contact 23. In this way, it involves adjusting the position of the busbar 3 and the position of the support arm 5, resulting in a relatively large workload for transformation, which is obviously inappropriate.

[0020] The aforementioned static contact heat sink 6 comprises a heat sink body 61 with a through hole in the middle, and bolts are passed through the through hole to connect the static contact heat sink 6 between the static contact 23 and the insulator 4. The outer periphery of the heat sink body 61 is provided with an umbrella-shaped heat sink 62 at intervals, and the heat sink body 61 and the umbrella-shaped heat sink 62 are both provided with heat dissipation holes; the heat dissipation holes are evenly distributed on the heat sink body 61 and the umbrella-shaped heat sink 62, and the heat sink body 61 is preferably a cylindrical structure, and the outer periphery of the umbrella-shaped heat sink 62 is also circular; in order to ensure the heat dissipation effect, the interval between adjacent umbrella-shaped heat sink fins 62 needs to be deepened, that is, the bottom of the interval is connected to the heat dissipation hole on the heat sink body 61;

[0021] In order to enhance the heat conduction efficiency between the heat sink body 61 and the static contact 23, a thermal conductive silicone grease layer may be applied to the contacting end surfaces of the two.

[0022] In order to improve the surface radiation coefficient of the static contact heat sink 6, a heat dissipation paint layer may be coated on the outer surface of the heat sink body 61 and the umbrella-shaped heat sink 62;

[0023] In order to ensure the strength of the static contact heat sink 6, the heat sink body 61 and the umbrella-shaped heat sink 62 are an integrally formed structure, and the material is selected from 2A11 aluminum alloy with relatively high thermal conductivity and medium strength;

[0024] The above description is only a preferred specific implementation mode of the present invention and is not a limitation of the present invention. Any equivalent substitutions and modifications made by any technical personnel in this field without departing from the guidance of the present invention are deemed to fall within the protection scope of the present invention.

Claims

1. A static contact heat sink for a high-current C-GIS equipment disconnector, comprising a three-position disconnector (2) arranged in a high-current C-GIS equipment (1), the three-position disconnector (2) having an actuator (21), a moving contact (22) driven by the actuator (21), and a static contact (23) matched with the moving contact (22), wherein the upper portion of the static contact (23) is fixedly connected to a busbar (3), and the rear portion is connected to an insulator (4) by bolts, and the insulator (4) is fixed in an air box of the C-GIS equipment (1) by a support arm (5), characterized in that: A stationary contact radiator (6) is arranged between the stationary contact (23) and the insulator (4), the stationary contact radiator (6) comprising a radiator body (61) having a through hole in the middle, an umbrella-shaped radiating fin (62) is arranged at an interval ring around the outer periphery of the radiator body (61), and heat dissipation holes are provided on the radiator body (61) and the umbrella-shaped radiating fin (62).

2. The static contact heat sink for a high current C-GIS equipment isolating switch according to claim 1, characterized in that: One end of the heat sink body (61) in contact with the static contact (23) is coated with a thermally conductive silicone grease layer.

3. The static contact heat sink for a high current C-GIS equipment isolating switch according to claim 1, characterized in that: The outer surfaces of the radiator body (61) and the umbrella-shaped radiating fins (62) are coated with a heat dissipation paint layer.

4. The static contact heat sink for a high current C-GIS equipment isolating switch according to claim 1, characterized in that: The radiator body (61) and the umbrella-shaped radiating fins (62) are an integrally formed structure.

5. The static contact heat sink for a high current C-GIS equipment isolating switch according to claim 1, characterized in that: The heat dissipation holes are evenly distributed on the radiator body (61) and the umbrella-shaped heat dissipation fins (62).

6. The static contact heat sink for a high current C-GIS equipment isolating switch according to claim 1, characterized in that: The bolt passes through the through hole to connect the stationary contact heat sink (6) between the stationary contact (23) and the insulator (4).

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