CN202003891U - High voltage grounding switch - Google Patents

Abstract

The utility model relates to a high-voltage grounding switch, which includes a housing and a movable contact. The high-voltage grounding switch also includes an electrical connection sleeve pierced on the side of the housing. The movable contacts are respectively mated and arranged on the corresponding The electrical connection sleeve extends inside, and one end of the electrical connection sleeve protruding into the housing is electrically connected to a conductive connection plate, and the end of the conductive connection plate far away from the conductive connection sleeve is connected to the corresponding conductive connection block, and the conductive connection blocks are respectively set. In the through opening of the insulator with a central through opening, the associated insulator is arranged on the housing. The utility model adopts three insulators without a central conductor, and changes the electrical connection relationship of the high-voltage grounding switch, and completely solves the problem that the insulators are easy to crack and cause the product to leak and cannot operate normally.

Description

A high voltage grounding switch

technical field

The utility model relates to the high-voltage electrical field, in particular to a high-voltage grounding switch.

Background technique

The grounding switch on the three-phase common box gas-insulated metal-enclosed switchgear product in the power system is mainly used for the grounding of the main circuit. The high-voltage grounding switch described in the prior art includes a housing, an oval insulator with three central conductors embedded in the side of the housing, a moving contact and a transmission system. The transmission system includes a connecting plate, and the connecting plate passes through The inner crank arm connected by the bearing and the grounding switch shaft fixedly connected to the inner crank arm, the moving contact is passed through the corresponding center conductor on the oval insulator, and one end of the moving contact extends into the housing They are all connected to the same connecting plate, and the other end of the moving contact is provided with a plum blossom contact finger, which is used to contact the static contact connected to the main circuit. By rotating the grounding switch shaft, the moving contact is controlled to move along the axis of the moving contact, and the corresponding static contact is disconnected or closed, so as to realize the grounding or non-grounding of the main circuit.

Because the expansion coefficient of the metal that makes up the center conductor and the insulating resin that make up the insulator are quite different, and three center conductors are embedded in an insulator, the extrusion and shrinkage between the center conductor and the insulator will easily cause the insulator to age, crack and leak. , resulting in very high requirements for this kind of insulator with three central conductors from the design structure, processing technology to assembly and use process; in addition, the opening and closing stress of the insulator during the work is Shock can easily cause insulators to crack and leak air. Therefore, when used in outdoor power stations, with the change of seasons, temperature changes, and stress impacts during work, insulators are prone to cracks, resulting in air leakage and unable to operate normally.

Contents of the invention

The purpose of the utility model is to provide a high-voltage grounding switch to solve the problem in the prior art that the insulator is easy to crack and the product cannot operate normally due to air leakage.

In order to solve the above problems, the technical solution of the utility model is: a high-voltage grounding switch, including a housing and a moving contact, the high-voltage grounding switch also includes an electrical connection sleeve pierced on the side of the housing, and the moving contact The heads are respectively mated and arranged in the corresponding electrical connection sleeves, and one end of the electrical connection sleeve protruding into the housing is electrically connected to a conductive connection plate, and the end of the conductive connection plate away from the conductive connection sleeve is connected to the corresponding conductive connection block. The conductive connection blocks are respectively arranged in the through holes of the insulator with a through hole in the center, and the associated insulators are arranged on the casing.

The insulator is arranged on the top of the casing.

The conductive connecting plate is L-shaped.

A spring contact finger is provided on one end of the movable contact protruding from the housing.

The upper part of the conductive connection block is a limiting edge, and the lower part passes through the corresponding insulator and the through hole on the upper surface of the housing and extends into the housing.

An insulating sleeve for realizing insulation between the electrical connection sleeve and the housing is provided between the electrical connection sleeve and the through hole of the housing.

The conductive connecting block is in the shape of a stepped shaft and consists of a large diameter section and a small diameter section. The large diameter section is the limit stop. equal.

The utility model adopts three independent insulators with through holes in the center, and a conductive connecting block is arranged in the insulator through holes. Still not the same, but because they are not cast together, the mutual stress effect is reduced, and because there is only one conductive connection block in the insulator, there is no such thing as the adjacent central conductor in the prior art and the insulator between the adjacent conductors at the same time Part of the joint stress between the phenomenon, the utility model also changes the path of the conductive circuit, the insulator is not stressed during the working process of the grounding switch, and the insulator only plays the role of insulating and isolating the shell, eliminating the influence of stress on the insulator, completely It solves the problem in the prior art that the insulator is easy to crack and the product cannot run normally due to air leakage.

This structure also adopts the spring contact finger as a new electrical contact method of sliding contact to replace the original plum blossom contact finger, thereby reducing cost, facilitating installation and improving production efficiency.

Description of drawings

Fig. 1 is the sectional front view of the utility model embodiment;

Fig. 2 is a sectional view along A-A in Fig. 1;

Fig. 3 is a sectional view along B-B direction in Fig. 2 .

Detailed ways

The embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1, 2, and 3, a high-voltage grounding switch includes a housing 10 and moving contacts 7, 9, and the high-voltage grounding switch also includes electrical connection sleeves 6, 8 that pass through the side of the housing 10, The moving contacts 7, 9 are mated and arranged in the corresponding electrical connecting sleeves 6, 8 respectively, and a spring contact finger is provided on the end of the moving contacts protruding from the housing, and the electrical connecting sleeve 6 , 8 and the perforation holes of the housing are provided with insulating sleeves for realizing the insulation of the electrical connection sleeves 6, 8 and the housing 10, and one end of the electrical connection sleeves 6, 8 protruding into the housing 10 is electrically connected to one end respectively. Conductive connection plate 5, the conductive connection plate 5 is L-shaped, one end of the conductive connection plate 5 away from the conductive connection sleeves 6, 8 is connected to the corresponding conductive connection block 2, and the conductive connection blocks 2 are respectively arranged in the center with In the said through hole of an insulator 1 with a through hole, the associated insulator 1 is arranged on the top of the housing 10, the upper part of the conductive connection block 2 is a limit stop, and the lower part passes through the corresponding insulator 1 and the top of the housing 10. through holes and extend into the interior of the housing. The conductive connecting block is in the shape of a stepped shaft and consists of a large diameter section and a small diameter section. The large diameter section is the limit stop. equal.

One end of each moving contact 7, 9 protruding into the casing 10 is connected to the same connecting plate 11, and between each adjacent moving contact 7, 9 inside the casing 10, along the The moving contacts 7 and 9 are provided with a guide rod 12 in the axial direction, and the connecting plate 11 is sheathed on the guide rod 12 . The connecting plate 11 is connected to the inner crank arm 4 through a bearing, and the inner crank arm 4 is fixedly connected to the grounding switch shaft 3 .

When the utility model is in use, the grounding switch shaft 3 drives the inner crank arm 4 to rotate, and drives the connecting plate 11 to move linearly along the guide rod 12, so as to realize the opening and closing operation of the high-voltage grounding switch.

Claims (7)

1. high voltage ground switch, comprise housing and moving contact, it is characterized in that: described high voltage ground switch also comprises the electric connecting sleeve that is located on the housing side, described moving contact inserting respectively is arranged in the described corresponding electric connecting sleeve, described electric connecting sleeve stretches into a end in the housing and conducts electricity respectively and connect a conductive connection plates, this conductive connection plates is connected on the corresponding conduction contiguous block away from an end of conduction adapter sleeve, the described conduction contiguous block center of being separately positioned on has in the described through hole of insulator of a through hole, and affiliated insulator is arranged on the housing.

2. a kind of high voltage ground switch according to claim 1 is characterized in that: described insulator is arranged on case top.

3. a kind of high voltage ground switch according to claim 1 is characterized in that: described conductive connection plates is L shaped.

4. a kind of high voltage ground switch according to claim 1 is characterized in that: the end that described moving contact stretches out housing is provided with a spring touch finger.

5. a kind of high voltage ground switch according to claim 1 is characterized in that: described conduction contiguous block top is a limiting block edge, and the bottom is passed the through hole of corresponding insulator and housing upper surface and stretched into enclosure interior.

6. a kind of high voltage ground switch according to claim 1 is characterized in that: be provided with the insulating case that is used to realize electric connecting sleeve and housing insulation between the perforating of described this electric connecting sleeve and housing.

7. according to claim 1 or 4 described a kind of high voltage ground switchs, it is characterized in that: described conduction contiguous block is the multidiameter shape, be made up of an enlarged diameter section and a reduced diameter section, this enlarged diameter section promptly is described limiting block edge, and the internal diameter of through hole equates on the diameter of this reduced diameter section and the insulator.

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