Grounding block, grounding structure using the same, insulator assembly, and GIL

Abstract

The invention relates to a grounding block, a grounding structure using the same, an insulator assembly, and a GIL. The grounding block comprises a ball seat in conductive connection with a corresponding grounding block support seat; a ball slot is formed in the ball seat; a conducting ball is assembled in the ball grove in a rolling mode; and the outer end of the conducting ball protrudes from the ball slot and is in contact and in rolling cooperation with the inner wall of a cylinder of a GIL. A plurality of rolling bodies are arranged between the conducting ball and the ball seat in the ball slot and are in contact and in rolling cooperation with the conducting ball and the ball seat respectively. Besides, a limiting structure for preventing separation of the conducting ball and the rolling bodies from the ball slot is arranged on the ball seat. On the basis of a universal ball structure, when an insulator is installed in the GIL cylinder in a sliding mode, the conducting bal and the rolling bodies are in rolling cooperation, so that a problem that the conducting ball can not roll smoothly due to direct contact between the conducting ball and the spring and thus the conducting ball is scratched or separated during the sliding assembling process to cause unreliable grounding in the prior art can be solved.

Description

technical field [0001] The invention relates to a grounding block applied to a supporting insulator in a GIL, a grounding structure using the grounding block, an insulator assembly and a GIL. Background technique [0002] A gas-insulated metal-enclosed transmission line (GIL) includes a metal GIL cylinder, a conductive conductor installed inside the GIL cylinder, and an insulator for insulating and supporting the conductor. The product quality and operating status of the insulator directly affect the operation of the entire power system. Safety, insulators are generally composed of epoxy resin castings and metal inserts. The metal inserts constitute the grounding structure. The grounding structure needs to be in reliable contact with the GIL cylinder to ensure reliable grounding. However, when the bus bar and insulator are slid into the GIL cylinder, the grounding structure of the transmission can easily scratch the inner wall of the GIL shell during the sliding process, res...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a grounding block that solves the problem in the prior art that the conductive ball is scratched or falls off during the sliding assembly process due to the direct contact of the conductive ball with the spring, resulting in unreliable grounding. At the same time, the purpose of the present invention It is also to provide a grounding structure using the grounding block, an insulator assembly and a GIL

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