Corrugated pipe protective gas chamber

Abstract

The invention discloses a corrugated pipe protective gas chamber, which is used for an arc extinguish chamber of a tank-type high-voltage vacuum circuit breaker, and comprises at least one stage of gas chamber structure, and each stage of gas chamber structure comprises an upper guide plate, a lower guide plate, an annular side plate, a gas chamber insulating pull rod, a gas chamber corrugated pipe and an inflation valve; the upper guide plate, the lower guide plate and the side plate enclose the gas chamber; the gas chamber corrugated pipe is sleeved outside the gas chamber insulating pull rod; the lower end of a movable conducting rod of the arc extinguish chamber penetrates through a through hole of the lower end cover plate and a first through hole of an upper guide plate of the first-stage gas chamber structure and then is connected with the upper end of a gas chamber insulating pull rod of the first-stage gas chamber structure; and the lower end of the gas chamber insulation pull rod of the gas chamber structure of the same level penetrates through a second through hole of the lower guide plate of the gas chamber structure of the same level and the first through hole of the upper guide plate of the gas chamber structure of the next level and then is connected with the upper end of the gas chamber insulation pull rod of the gas chamber structure of the next level. The gas chamber corrugated pipes in the gas chamber are connected in series step by step to bear the air pressure difference, and the influence of the high air pressure difference between the inner and outer walls of the corrugated pipes of the arc extinguish chamber on the fatigue life of the corrugated pipes is reduced.

Description

technical field [0001] The invention relates to the technical field of arc extinguishing chambers, in particular to a bellows protective gas chamber. Background technique [0002] Switchgear is an important control and protection device in power system. Vacuum and SF 6 It is two kinds of insulation and arc extinguishing media with excellent performance widely used in circuit breakers, and the "Kyoto Conference Book" will SF 6 After it was officially identified as a greenhouse gas, the research on vacuum circuit breakers has become an important research direction in the field of high-voltage switches at home and abroad. The bellows is a key and important sensitive elastic element in the vacuum interrupter, and its functions are sealing, shock absorption, compensation and connection. One end of the bellows is fixed and welded to the lower end cover plate of the arc extinguishing chamber, and the other end moves and is welded to the moving conductive rod of the moving contac...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a bellows protective air chamber to solve the problem of short mechanical life of the bellows in the prior art

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