Vacuum arc-extinguishing chamber

Abstract

The invention provides a vacuum arc-extinguishing chamber. The vacuum arc-extinguishing chamber comprises a shell, a static contact, a movable end cover plate, a movable conducting rod, a movable contact which is positioned in the shell and is fixed at the end part of the movable conducting rod, a stop piece which is fixed on the movable conducting rod, is positioned outside the shell, and is provided with a stop surface arranged towards the movable end cover plate, and a reset elastic piece which is arranged between the stop piece and the movable end cover plate, one end of the reset elasticpiece abuts against the stop surface, the other end of the reset elastic piece abuts against the movable end cover plate, and the reset elastic piece applies counter-acting force towards the opening direction to the movable conducting rod through the stop piece, so that a certain distance is kept between the movable contact and the static contact. The beneficial effects are that through selectingthe reset elastic piece with an appropriate specification, contact between the movable contact and the static contact can be avoided, collision and abrasion in a transportation process are further avoided, and delivery quality is guaranteed. In addition, when an operating mechanism breaks down, the vacuum arc-extinguishing chamber can be automatically in a disconnected state, so that the circuit is disconnected in time, and accidents are avoided.

Description

technical field [0001] The invention relates to a vacuum interrupter. Background technique [0002] The vacuum interrupter is an important part of the vacuum circuit breaker. For example, a vacuum interrupter and its static end assembly disclosed in the Chinese invention patent application with the application publication number of CN104766757A. ), one end of the housing is fixed with a static end cover, the other end is fixed with a moving end cover, the static end cover is fixed with a static end conductive rod, and the end of the static end conductive rod is fixed with a static contact. A guide sleeve is installed on the moving end cover plate through the fixed flange, and the moving conductive rod is guided and moved in the guiding sleeve. One end of the bellows is fixed to the moving end cover plate, and the other end is fixed to the moving conductive rod. A moving contact is fixed at the end of the moving conductive rod. Driven by the moving conductive rod, the moving...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vacuum interrupter to solve the problem that the dynamic and static contacts in the existing vacuum interrupter are in direct contact with the self-closing force under normal conditions, which leads to the problem of easy collision and wear during transportation. And the problem that the existing vacuum interrupter cannot disconnect the line in time when the operating mechanism fails

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