A connection device between contact arm and solid-sealed pole of vd4 vacuum medium voltage circuit breaker

Abstract

The invention discloses a connection device of a VD4 vacuum middle-voltage circuit breaker contact arm and a solid-sealed pole post. The connection device comprises a contact arm and a pole post, wherein a sleeve fixedly sleeves an outer surface of the contact arm, a sealing sleeve fixedly sleeves an outer surface of the pole post, the contact arm is arranged at one side of the pole post, a sleeve shell is arranged at one end, near to the pole post, of the sleeve and sleeves the sealing sleeve, a first threaded hole is formed in one side surface, near to the pole post, of the contact arm, and a second threaded hole is formed in a position, corresponding to the first threaded hole, of one side surface, near to the contact arm, of the pole post. In the connection device of the VD4 vacuum middle-voltage circuit breaker contact arm and the solid-sealed pole post, a first screw rod is in threaded connection with the first threaded hole, a second screw rod is in threaded connection with the second threaded hole, a connection end of a bolt extends out of a through hole and is in threaded connection with a third threaded hole, the connection between a connection disc and the contact arm is improved, the connection device can bear a larger falling force and cannot be easily deformed, and the problem of unfirm connection between an existing middle-voltage circuit breaker contact arm and the solid-sealed pole post is solved.

Description

technical field [0001] The invention relates to the technical field of medium-voltage electric power products, in particular to a connection device between a contact arm and a solid-sealed pole of a VD4 vacuum medium-voltage circuit breaker. Background technique [0002] There are usually the following two connection methods between the contact arm and the solid-sealed pole of the existing medium-voltage circuit breaker: (1) open a hole on one of the parts, and open a thread on the other part, and then use bolts to connect the two The parts are locked, (2) both parts have through holes, and then the two parts are locked with bolts and nuts by hand, and the existing contact arm is mostly connected to the ground level when it is connected to the solid-sealed pole, and it will Under the influence of a downward force, the existing connection structure is too simple and not fast enough, and the drop of the contact arm will affect the connection between the contact arm and the sol...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a connection device between the contact arm and the solid-sealed pole of a VD4 vacuum medium-voltage circuit breaker, which solves the problem of the connection between the contact arm and the solid-sealed pole of the existing medium-voltage circuit breaker not fastening problem

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