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Vacuum arc extinguishing chamber

A vacuum interrupter and cover plate technology, which is applied to high-voltage air circuit breakers, electrical components, electrical switches, etc., can solve problems that affect arc extinguishing, cannot achieve rapid cooling, and pollute the insulating shell, so as to reduce fatigue strength and avoid Decrease in dielectric strength and effect of pollution prevention

Inactive Publication Date: 2017-06-20
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of the vacuum interrupter, the arc will generate metal vapor and pollute the insulating shell. The existing technology only adds a shield to the vacuum interrupter, but it cannot achieve the purpose of rapid cooling and affects the extinguishment of the arc.

Method used

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] Such as figure 1 , figure 2 and image 3 The shown vacuum interrupter includes an insulating shell 1, a static end cover plate 2 and a moving end cover plate 3 fixed at both ends of the insulating shell 1, and a fixed end cover plate 2 is arranged in the insulating shell 1. The static conductive rod 4 and the movable conductive rod 5 slidingly connected on the movable end cover plate 3 have a gap between the movable conductive rod 5 and the static conductive rod 6, and the inner end of the static conductive rod 2 is provided with a static contact 6, and the movable conductive rod The inner 5 end is provided with a movable contact 7, and the outer casing of the movable conductive rod 7 is provided with a bellows 13, and the inner 1 of the...

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Abstract

The invention discloses a vacuum interrupter, which relates to the technical field of electrical vacuum switches. Including the vacuum interrupter body, the insulating shell is provided with a shielding tube covering the moving contact and the static contact. The inside of the shielding tube is hollow, and a cooling pipe extends to the outside of the insulating shell on both sides. A micro-refrigerant generator is provided at the entrance of the cooling pipeline on one side, and the outer casing of the moving conductive rod is provided with an annular sealed cavity surrounded by elastic materials, and the sealed cavity is arranged between the moving conductive rod and the bellows The two sides of the sealed cavity are respectively provided with a cooling pipe extending to the outside of the moving end cover, and the cooling pipe on one side is also connected to the micro-refrigerant generator. The vacuum interrupter of the invention can quickly extinguish the arc between the movable contact and the static contact, reduce the temperature of the bellows, and prolong the service life of the bellows.

Description

technical field [0001] The invention relates to the technical field of electrical vacuum switches, in particular to a vacuum interrupter. Background technique [0002] The vacuum interrupter is the core component of the medium and high voltage power switch. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off through the excellent insulation of the vacuum inside the tube, so as to avoid accidents and accidents. It is widely used in power transmission and distribution control systems. During the use of the vacuum interrupter, the arc will generate metal vapor and pollute the insulating shell. The existing technology only adds a shield to the vacuum interrupter, but it cannot achieve the purpose of rapid cooling and affects the extinguishment of the arc. In the vacuum interrupter, the bellows are welded to the outer wall of the moving conductive rod and the inner opening of the moving end cover. When ...

Claims

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Application Information

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IPC IPC(8): H01H33/662H01H33/664
CPCH01H33/66261H01H33/6642
Inventor 洪露刘金龙王经卓掌明张胜张之光
Owner HUAIHAI INST OF TECH
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