Vacuum interrupter and its bellows

Abstract

The invention relates to the technical field of circuit breakers, and provides a vacuum interrupter and a bellows of the interrupter, which can solve the problem that the bellows are prone to fatigue and cracking in the prior art. The vacuum interrupter includes a casing, a moving end assembly and a moving end cover; the outer peripheral surface of the moving conductive rod is covered with an arc extinguishing chamber bellows, and the arc extinguishing chamber bellows has a moving end connected with the moving conductive rod of the vacuum interrupter , the static end connected to the movable end cover of the vacuum interrupter; the bellows of the arc interrupter is a variable wall thickness structure in which the thickness of the pipe wall changes along the axial direction; or, the bellows of the arc interrupter has a tube in the axial direction The variable wall thickness section whose wall thickness changes along the axial direction; the wall thickness of the overall bellows of the arc extinguishing chamber or the wall thickness of the variable wall thickness section gradually decreases from the moving end to the static end, or, the overall bellows of the arc extinguishing chamber Or the variable wall thickness section is divided into a plurality of unit sections in the axial direction, the pipe wall thickness of each unit section is consistent, and the pipe wall thickness of the unit section near the moving end among the adjacent unit sections is greater than the pipe wall thickness of the unit section near the static end .

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a vacuum interrupter and a bellows of the interrupter. Background technique [0002] As the core component of the circuit breaker, the vacuum interrupter has a very important life and reliability to the whole circuit breaker. The authorized announcement number is CN206225281U, and the patent document whose authorized announcement date is 2017.06.06 discloses a magnetic interrupter for a high-voltage vacuum circuit breaker, which includes a ceramic shell. The end cover, the two ends of the cover are respectively equipped with a moving conductive rod and a static conductive rod, and the ends of the moving and static conductive rods are provided with a moving contact and a static contact. The moving conductive rod and the moving contact form a dynamic terminal components. A corrugated tube with an overall cylindrical shape and equal diameter is sheathed on the movable con...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a corrugated tube of an arc extinguishing chamber, which can solve the problem that the corrugated tube in the prior art is prone to fatigue and cracking; at the same time, the present invention also proposes a vacuum interrupter using the corrugated tube of the arc extinguishing chamber, which has Good life and stable reliability

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