Vacuum arc-extinguishing chamber with closing self-hold function

Abstract

The invention relates to a vacuum arc-extinguishing chamber with the closing self-hold function. The vacuum arc-extinguishing chamber comprises an insulating cylinder. The two ends of the insulating cylinder are provided with a fixed contact and a moving contact respectively and respectively provided with a sealing flange. The moving contact is sleeved with a corrugated pipe playing a role in sealing. A vacuum space is formed by the insulating cylinder, the sealing flanges, the fixed contact, the moving contact and the corrugated pipe. One end of the fixed contact and one end of the moving contact penetrate out of the insulating cylinder respectively. The end, inside the insulating cylinder, of the fixed contact is composed of a plurality of metal petals which are arranged in a circle in a surrounding mode. A cylindrical cavity is formed by the metal petals. The peripheral wall of the end, inside the insulating cylinder, of the moving contact is in an arc shape. The arc-shaped end is inserted into the cylindrical cavity so that the fixed contact and the moving contact can be electrically connected. According to the vacuum arc-extinguishing chamber with the closing self-hold function, contact pressure from the outside is not needed, and a switch operating mechanism is simplified.

Description

technical field [0001] The invention relates to a vacuum interrupter with closed self-holding function. Background technique [0002] Such as figure 1 As shown, in the traditional load switch vacuum interrupter, the static contact 2 and the moving contact 3 are flat contact type, and the traditional vacuum load switch is driven by a spring operating mechanism through a mechanical transmission mechanism to push the flat movable contact in the arc extinguishing chamber. Contact 3 realizes closing action. Due to the large mass of the flat-type movable contact 3, it is not conducive to the acceleration of the closing action. After the contact is closed, the spring needs to provide the contact pressure. The closing process of the operating mechanism needs to overcome the work of the contact pressure spring and then close the lock. It is difficult to achieve closing and opening time of vacuum load switch <40ms. And the structure of the operating mechanism is complex. Conte...

AI Technical Summary

Problems solved by technology

Due to the large mass of the flat-type movable contact 3, it is not conducive to the acceleration of the closing action. After the contact is closed, the spring needs to provide the contact pressure. The closing process of the operating mechanism needs to overcome the work of the contact pressure spring and then close the lock. It is difficult to realize the closing and opening time of vacuum load switch <40ms

And the structure of the operating mechanism is complex

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