A three-position isolating grounding switch and its barrel

Abstract

The invention relates to a three-station isolated earthing switch and a cylinder thereof. The three-station isolated earthing switch comprises a cylinder body consisting of a main body section and a static-end mounting portion arranged on the main body section. A moving end part and an earthing static contact that are arranged by corresponding to the main body section and the static-end mounting portion are arranged at the cylinder body. The earthing static contact has an inner section extending to the cylinder. The static-end mounting portion is provided with a penetration hole segment for accommodating the inner section. The earthing static contact and the cylinder are in conductive connection. The penetration hole segment having a hole expansion structure is a smooth transition segmentprotruding inwardly, wherein the internal diameter of the inner wall of the segment is increased gradually from one end away from the main body section to one end approaching the main body section. After the penetration hole segment is designed to have a specific shape, the distance between the moving end part and the earthing static contact is reduced and the dimension of the external diameter ofthe cylinder is reduced on the premise that the insulation requirement between the moving end part and the earthing static contact is met, so that the overall outer dimension of the cylinder is reduced.

Description

technical field [0001] The invention relates to a three-station isolating grounding switch and a cylinder body thereof. Background technique [0002] Since the three-position isolating and grounding switch integrates the functions of the isolating switch and the grounding switch, it has the advantages of low cost, small size, and high safety. Integrating into a cylinder, how to meet its insulation capacity, especially the insulation capacity of the ground terminal, has increasingly become the focus of designers in a limited space. [0003] An invention patent application with the application publication number CN102368445A discloses a three-position isolating switch. The three-position isolating switch includes a cylinder, and the two ends of the cylinder are respectively the isolating switch static contact and the grounding switch static contact. , the cylinder body is also provided with a moving end part located in the cylinder body, the moving end part includes a moving ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a three-position isolating grounding switch with a simple structure to solve the requirement of insulation between the moving end part and the static contact in the open state in the prior art, resulting in relatively small external dimensions of the cylinder. Big problem; also offers a barrel for a three-position isolating earthing switch

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