Pole-mounted vacuum circuit breaker

Abstract

The invention discloses a pole-mounted vacuum circuit breaker, which comprises a plurality of arc extinguishing chambers, a box body for installing the arc extinguishing chambers, and a driving device arranged on one side of the box body. The lower end of the arc extinguishing chamber has a movable conductive rod, and the lower end of the movable conductive rod has a pusher. There is an opening and closing mechanism and an opening mechanism inside the box. The driving device is connected with the opening and closing mechanism. The opening and closing mechanism is composed of sliding parts, multiple sliding sleeves and elastic parts. The opening and closing mechanism adopted in the pole-mounted vacuum circuit breaker can quickly push the movable conductive rod, so that the movable conductive rod is connected with the fixed conductive rod. And the elastic part adopted can be easily replaced after long-term use, and it can be easily removed only by applying force to the elastic part. It avoids friction between important components, resulting in shortened service life, saves replacement time, and improves maintenance work efficiency.

Description

technical field [0001] The invention relates to circuit breaker technology, in particular to a column-mounted vacuum circuit breaker. Background technique [0002] The working principle of the vacuum circuit breaker on the column is mainly used for disconnection and connection of the main circuit, and it can also be used for overload protection and short circuit protection. [0003] CN106941054B discloses a vacuum circuit breaker on a column. In this circuit breaker, a connecting rod is used to push the moving conductive rod in the arc extinguishing chamber to move upward. When opening and closing each time, the limiting column and the waist hole will be affected. Friction, under long-term use, will cause damage to the limit column, damage to parts, and affect the opening and closing of the vacuum circuit breaker. Wherein the set first limit post and the second limit post are subjected to relatively large force and relatively large frictional force, resulting in shortened s...

AI Technical Summary

Problems solved by technology

[0003] CN106941054B discloses a vacuum circuit breaker on a column. In this circuit breaker, a connecting rod is used to push the moving conductive rod in the arc extinguishing chamber to move upward. When opening and closing each time, the limiting column and the waist hole will be affected. Friction, long-term use, will cause damage to the limit column, damage to parts, and affect the opening and closing of the vacuum circuit breaker

Among them, the first limit post and the second limit post are subjected to a large force and a large friction force, resulting in a shortened service life

And when replacing, it is necessary to take out the first limit post and the second limit post from the bracket, the main shaft and the rotating rod, which will cause the whole mechanism to be disengaged during installation and disassembly; at the same time, the installation is difficult and the operation is inconvenient, and it is necessary to use an external The tool can remove the first limit post and the second limit post, thereby affecting the working time and reducing work efficiency

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