A vacuum circuit breaker and its vacuum interrupter

Abstract

The invention relates to a vacuum circuit breaker and a vacuum extinction chamber thereof. The vacuum extinction chamber comprises a housing extending in an up-and-down direction, the two ends of thehousing are correspondingly provided with a static end cover and a moving end cover, a moving conductive rod is movably arranged on the moving end cover, the upper end of the moving conductive rod isprovided with a moving contact, a static conductive rod is elastically assembled in a floating mode in the housing in the up-and-down direction, the lower end of the static conductive rod is providedwith a static contact, the housing is internally provided with a pressure spring applying prepressure to the static conductive rod to compel the static conductive rod to move downwards to allow the moving contact and the static contact to be in contact, and the static conductive rod is sleeved with a static end corrugated pipe having an upper end sealingly and fixedly connected with the static endcover and having a lower end sealingly and fixedly connected with the static conductive rod. The pressure spring is arranged on the static conductive rod to supply prepressure to the contact and conduction of the moving contact and the static contact and avoid the consumption of the operation power supplied by the operating mechanism so as to improve the reliability of the vacuum circuit breaker;and moreover, the arrangement of the static end corrugated pipe reduces the bounce amount of the moving and static contact opening rebound and the closing bounce, and prolongs the mechanical life ofthe static end corrugated pipe.

Description

technical field [0001] The invention relates to a vacuum circuit breaker and its vacuum interrupter. Background technique [0002] The current in the high-voltage line can generate a long arc without extinguishing, so the high-voltage circuit breaker is required to have a perfect arc-extinguishing function. To extinguish the arc, the contact and separation of the dynamic and static contacts in the vacuum interrupter are controlled by the operating mechanism to realize the connection and disconnection of the current of the vacuum circuit breaker. The invention patent application with the application publication number CN106601546A discloses a general-purpose mechanism for protecting vacuum tubes and a vacuum circuit breaker. In the vacuum circuit breaker, a spring connected under the transmission rod is used to provide pre-pressure for the dynamic and static contacts in the vacuum tube to ensure the normal flow. The moving and static contacts are in reliable contact during f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vacuum interrupter to solve the technical problem in the prior art that the reliability of the circuit breaker is reduced due to the consumption of certain operating work by the spring. The present invention also provides a vacuum circuit breaker using the above-mentioned vacuum interrupter

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