A column-mounted vacuum circuit breaker

Abstract

The invention discloses a pole-mounted vacuum circuit breaker, which relates to the technical field of circuit breakers. The key points of the technical solution include a base and a pole, and the base is provided with a closing power mechanism, an opening power mechanism, a closing and opening mechanism and The transmission mechanism, the transmission mechanism includes a support frame and a transmission rod. The support frame is provided with a first movable hole and a second movable hole. The first movable hole and the second movable hole are waist-shaped holes and form a certain angle with each other; The transmission rod is pierced with a first operating part whose two ends are respectively snapped into the first movable hole, and the support frame is provided with a second operating part whose two ends are respectively snapped into the second movable hole, and the first operating part and the second The operating parts are connected through a linkage plate, and the support frame is provided with a first limiting part that cooperates with the first operating part and restricts the axial movement of the first operating part, and a second limiting part that cooperates with the second operating part and restricts the axial movement of the second operating part. As for the limiter, the present invention has the effect of facilitating the replacement of worn parts.

Description

technical field [0001] The present invention relates to the technical field of a circuit breaker, in particular to a pole-mounted vacuum circuit breaker. Background technique [0002] Pole-mounted vacuum circuit breakers are circuit breakers that are installed and operated on poles. The power research level and manufacturing technology of various circuit breakers have made great progress. Vacuum circuit breakers are not limited to medium-voltage power grids, but are developing towards high voltage and large capacity. Sulfur hexafluoride circuit breakers have many Advantages, such as strong opening capacity, many continuous breaking times, frequent operation, low operating noise, no fire hazard, etc., it is a very good oil-free equipment. [0003] The utility model patent with the authorized announcement number CN201289816Y discloses an outdoor high-voltage permanent magnet vacuum circuit breaker. In the invention, the movement of the main shaft along the waist-shaped hole ...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned vacuum circuit breaker has the following problems: when the driving arm or the opening spring drives the main shaft to move, the force exerted on the main shaft is not exactly along the horizontal direction, and is limited by the waist-shaped hole and the limit post on the side of the main shaft. The movement direction of the main shaft, so every time the switch is opened and closed, the inner wall of the limit column and the waist hole will be worn. After the wear reaches a certain level, the main shaft will become unstable when it moves. At this time, the main shaft needs to be replaced.

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