High-voltage DC on-off device anti-deflection mechanism and high-voltage DC on-off device

Abstract

The invention discloses a high-voltage DC on-off device anti-deflection mechanism. The high-voltage DC on-off device anti-deflection mechanism comprises a contact chamber, a contact bridge and movablecontacts; a first contact member and a second contact member are arranged in the contact chamber; the movable contacts are arranged at the left and right ends of the contact bridge; a drive rod movesup and down to drive the contact bridge to move up and down and further enable the movable contacts to connect or disconnect with fixed contacts; the top end of the drive rod is fixedly provided witha limitation clamping spring; the limitation clamping spring is provided with a horizontal limiting frame for limiting the horizontal movement of the contact bridge; and the limitation clamping spring is also internally provided with an axial spring for limiting the axial movement of the contact bridge. The high-voltage DC on-off device anti-deflection mechanism has the beneficial effects that the limitation clamping spring performs complete limitation in the horizontal direction on the contact bridge so as to completely fix the limitation clamping spring and the contact bridge horizontally,and a horizontal movement problem of the contact bridge caused by aging failure of the spring is avoided.

Description

technical field [0001] The invention relates to a high-voltage direct current circuit-breaker, in particular to an anti-deflection mechanism of a high-voltage direct current circuit-breaker for preventing deflection of a contact bridge in the high-voltage direct current circuit-breaker, and a high-voltage direct current circuit-breaker using the anti-deflection mechanism. Background technique [0002] In the high-voltage DC circuit breaker, the movable armature will drive the push rod to move up and down, so that the movable contact on the contact bridge fixed on the upper end of the push rod will contact or separate from the static contact. In the prior art, the push rod connecting the movable armature and the contact bridge is only guided in the axial direction, and there is no limit in the circumferential direction of the push rod. Therefore, the push rod may rotate in the circumferential direction during the up and down movement , resulting in a horizontal deflection of ...

AI Technical Summary

Problems solved by technology

In the above patent, two return force springs are used to limit the horizontal deflection of the contact bridge, but it also brings new problems. Once one of the return force springs fails or is aging and fatigued after long-term use, the range will further promote the contact bridge. deflection in the horizontal direction, so it does not fundamentally solve the above technical problems

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