Vacuum circuit breaker force reducing device

Abstract

The invention discloses a vacuum circuit breaker force reducing device, which comprises a support, vacuum tubes and a driving mechanism. The vacuum tubes are arranged on the support at intervals; and each vacuum tube is provided with a connecting rod. The driving mechanism comprises a driving member, a crank and a drive rod. The driving member is in drive connection with the drive rod; the crank is in drive connection with the drive rod; the crank is also connected with a main shaft; the main shaft is slidably arranged on the support; the main shaft is provided with a lower swing arm and an upper swing arm; and one end of the lower swing arm is hinged with the main shaft through a first hinge shaft, and the other end thereof is hinged with the support. The support is provided with a first slide groove in the place corresponding to the lower swing arm; each connecting rod is in same-direction arrangement with the first slide groove; and one end of the upper swing arm is connected with the connecting rod and is slidably arranged in the first slide groove along the first slide groove, and the other end is hinged to the main shaft through the first hinge shaft. The device reduces wear of parts in a switch cabinet in opening-closing operation of a vacuum tube, and prolongs the overall service life of the device.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a force reducing device in an opening and closing structure of a vacuum circuit breaker. Background technique [0002] Vacuum circuit breaker is named for its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no maintenance for arc extinguishing. The application is more popular. A vacuum circuit breaker usually includes a bracket, a vacuum tube and a switchgear. The vacuum tubes are erected side by side on the bracket. The vacuum tube is provided with a connecting rod for opening and closing the vacuum tube. The connecting rod moves into the vacuum tube to make the vacuum tube close and conduct. The movement of the vacuum tube makes the vacuum tube open and disconnected. Generally, the connecting rod is equipped ...

AI Technical Summary

Problems solved by technology

A vacuum circuit breaker usually includes a bracket, a vacuum tube and a switchgear. The vacuum tubes are erected side by side on the bracket. The vacuum tube is provided with a connecting rod for opening and closing the vacuum tube. The connecting rod moves into the vacuum tube to make the vacuum tube close and conduct. The movement of the vacuum tube makes the vacuum tube open and disconnected. Generally, the connecting rod is equipped with a reset spring for resetting the connecting rod to the position of the vacuum tube open. The switch cabinet is equipped with a permanent magnet operation box or a mechanical operation box. The drive mechanism It usually includes driving parts, which are connected with the permanent magnet control box or the output shaft of the mechanical operation box. However, in the opening and closing operation of the vacuum circuit breaker, especially in the process of opening and resetting, in order to ensure the reset, the reset pull The force of the spring is usually large, which makes the transmission structure parts in the permanent magnet operation box or mechanical operation box easy to wear and reduce the service life, and there are many parts in the permanent magnet operation box or mechanical operation box, and the whole is more complicated , when subjected to the impact of opening and reset, it is easy to damage the internal parts and reduce the service life of the equipment, and it is difficult to replace the parts in the switchgear, and the replacement after damage is cumbersome, which affects the use efficiency of the equipment

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