A new type of grounding structure of fast grounding switch

Abstract

A new type of grounding structure for a fast grounding switch includes a grounding insulator and a metal conductive part; the grounding insulator is composed of an insulator flange and a grounding copper bar, the insulator flange is connected to a tank body, the grounding copper bar passes through the tank body and does not contact it, and the end of the grounding copper bar away from the insulator flange is connected to the metal conductive part; a through hole is provided inside the metal conductive part, the fast grounding moving contact passes through the through hole and can move along the through hole, a plurality of annular grooves are sequentially provided in the axial direction in the through hole, a strip contact finger of a conductor is installed in the middle annular groove, non-conductive guide rings are installed in the annular grooves at both ends, the strip contact finger contacts and conducts with the fast grounding moving contact, and the guide ring contacts with the fast grounding moving contact and limits the axial direction of movement. Through the above structure, the utility model provides a grounding structure that is easy to mass produce, has a high yield, is solid and reliable, and reduces costs.

Description

Technical Field

[0001] This patent relates to the technical field of high-voltage switch transmission equipment, in particular to a grounding structure of a fast grounding switch in a 252kV sulfur hexafluoride gas insulated metal-enclosed switchgear. Background Art

[0002] The grounding structure of the fast grounding switch plays the role of current flow, support, and insulation, and is the core part of the fast grounding switch. With the development of high-voltage switch technology, the reliability and stability of the grounding structure of the primary and secondary systems of the equipment are increasingly required. Higher requirements are placed on the performance of the grounding structure of the fast grounding switch. The grounding structure of the traditional fast grounding switch is to cast the metal conductive parts in the center of the insulator, but due to the complex shape of the metal conductive parts and the difference in resin shrinkage, the yield is low, the reliability is poor, and it is easy to break. In addition, the metal conductive parts need to be installed with traditional plum blossom contacts, which are complicated to assemble and costly. Summary of the invention

[0003] The utility model aims at the problems existing in the background technology and provides a novel grounding structure of a fast grounding switch, which solves the technical problems existing in the prior art such as low yield, poor reliability, easy breakage and complex assembly.

[0004] The purpose of the utility model is achieved through the following technical solutions: a grounding structure of a novel fast grounding switch, comprising a grounding insulator and a metal conductive part; the grounding insulator is composed of an insulator flange and a grounding copper bar, the insulator flange is connected to a tank body, the grounding copper bar passes through the tank body and does not contact the tank body, and the end of the grounding copper bar away from the insulator flange is connected to the metal conductive part; a through hole is provided inside the metal conductive part, a fast grounding moving contact passes through the through hole and can move along the through hole direction, a plurality of annular grooves are sequentially provided in the through hole along the axial direction, a strip contact finger of a conductor is installed in the middle annular groove, non-conductive guide rings are installed in the annular grooves at both ends, the strip contact finger contacts and conducts with the fast grounding moving contact, and the guide ring contacts with the fast grounding moving contact and limits the axial direction of movement.

[0005] Preferably, the insulator flange and the grounding copper busbar are cast as an integral part.

[0006] Preferably, the insulator flange is connected to the tank body via bolts I.

[0007] Preferably, a sealing ring I and a sealing ring II are provided on the side of the insulator flange close to the grounding copper bar, the sealing ring is pressed between the insulator flange and the tank body, and the bolt I is arranged on the outside of the sealing ring I and the sealing ring II.

[0008] Preferably, the grounding copper bar is connected to the metal conductive member via bolts II.

[0009] The beneficial effects of the utility model are:

[0010] The utility model changes the original grounding insulator structure through the structure, the metal conductive part is independently formed into a component, the plum blossom contact finger is eliminated, and a new grounding insulator is designed, which has the advantages of fewer types of parts, lower costs, and easy installation, commissioning, inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0012] A new type of grounding structure of a fast grounding switch includes a grounding insulator 1 and a metal conductive part 6; the grounding insulator 1 is composed of an insulator flange and a grounding copper bar 4, and the insulator flange and the grounding copper bar 4 are cast as one piece. The insulator flange is connected to the tank body 5 by bolts I9, the grounding copper bar 4 passes through the tank body 5 and does not contact it, and the end of the grounding copper bar 4 away from the insulator flange is connected to the metal conductive part 6 by bolts II10. A through hole is provided inside the metal conductive part 6, and a fast grounding moving contact 11 passes through the through hole and can move along the through hole. A plurality of annular grooves are sequentially provided in the through hole along the axial direction, and a conductive strip contact finger 8 is installed in the middle annular groove, and a non-conductive guide ring 7 is installed in the annular grooves at both ends, and the strip contact finger 8 contacts and conducts with the fast grounding moving contact 11, and the guide ring 7 contacts with the fast grounding moving contact 11 and limits the axial direction of movement.

[0013] Preferably, a sealing ring I2 and a sealing ring II3 are provided on one side of the insulator flange close to the grounding copper bar 4, the sealing rings are pressed between the insulator flange and the tank body 5, and the bolts I9 are arranged on the outside of the sealing rings I2 and II3.

[0014] The grounding copper bar 4 is a cylindrical copper rod structure as a whole, and a plane is processed at the position where it is connected to the metal conductive member 6 to facilitate positioning and connection.

[0015] When used specifically, Figure 1As shown, the grounding structure of the fast grounding switch includes a grounding insulator 1, a sealing ring I2, a sealing ring II3, a grounding copper bar 4, a tank body 5, a metal conductive part 6, a guide ring 7, a strip contact finger 8, a bolt I9, and a bolt II10; first, the upper grounding insulator 1 is installed into the sealing ring I2 and the sealing ring II3, and connected to the tank body 5 through the bolt I9, and then the metal conductive part 6 is connected to the grounding insulator 1 through the bolt II10 to form a whole, and finally two guide rings 7 and three strip contact fingers 8 are installed respectively. When working, the fast grounding moving contact 11 is supported by the grounding insulator 1 and the metal conductive part 6 to perform opening and closing movements. When installing and measuring on site, the grounding insulator 1 isolates the metal conductive part 6 from the tank body so that the whole interval resistance can be measured through the metal conductive part 6 at the installation site; when running, the moving contact is opened. If maintenance or short-circuit closing is required, the moving contact can be supported by the grounding insulator and connected to the ground grid.

Claims

1. A new type of grounding structure of a fast grounding switch, characterized in that: The invention comprises a grounding insulator (1) and a metal conductive part (6); the grounding insulator (1) is composed of an insulator flange and a grounding copper bar (4); the insulator flange is connected to a tank body (5); the grounding copper bar (4) passes through the tank body (5) without contacting the tank body; the end of the grounding copper bar (4) away from the insulator flange is connected to the metal conductive part (6); a through hole is provided inside the metal conductive part (6); a fast grounding moving contact (11) passes through the through hole and can move along the through hole; a plurality of annular grooves are sequentially provided in the through hole along the axial direction; a conductive strip contact finger (8) is installed in the middle annular groove; non-conductive guide rings (7) are installed in the annular grooves at both ends; the strip contact finger (8) contacts and conducts with the fast grounding moving contact (11); the guide ring (7) contacts and limits the axial direction of movement of the fast grounding moving contact (11).

2. The grounding structure of a novel fast grounding switch according to claim 1 is characterized in that: The insulator flange and the grounding copper bar (4) are cast into one piece.

3. The grounding structure of a novel fast grounding switch according to claim 1 is characterized in that: The insulator flange is connected to the tank body (5) via bolts I (9).

4. The grounding structure of a novel fast grounding switch according to claim 3 is characterized in that: The insulator flange is provided with a sealing ring I (2) and a sealing ring II (3) on one side close to the grounding copper bar (4). The sealing ring is pressed between the insulator flange and the tank body (5). The bolt I (9) is arranged on the outside of the sealing ring I (2) and the sealing ring II (3).

5. The grounding structure of a novel fast grounding switch according to claim 1 is characterized in that: The grounding copper bar (4) and the metal conductive member (6) are connected via bolts II (10).

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