Auxiliary knife grounding drive mechanism of load switch

Abstract

The invention belongs to the field of a high-voltage switchgear and relates to a load switch auxiliary switch grounding driving mechanism. The driving mechanism comprises a linkage crank arm driven by a load switch main shaft. The outer end of the linkage crank arm is provided with a guide pin; the guide pin is arranged in a guide groove in the front section of a lever and can slide along the guide groove; the middle portion of the lever is hinged to a fixed pivot shaft; the back end of the lever is hinged to a grounding auxiliary switch pull rod; and the grounding auxiliary switch pull rod can swing with the lever and drives a grounding auxiliary switch to be switched on or off. The front section of the guide groove is an arc section, and the travel track of the guide pin moving from a closed position to an opening position of a load switch with the linkage crank arm is overlapped with the arc section; and the back section of the guide groove is a line section extending backwards and downwards along the tangential direction of the arc section. The lever and guide groove shape are arranged in an optimization manner, so that in the load switch grounding process, transmission resistance to the grounding auxiliary switch is small, and transmission reliability is improved.

Description

technical field [0001] The invention belongs to high-voltage switchgear, and relates to a load switch auxiliary knife grounding drive mechanism. Background technique [0002] During the working process of the three-position load switch, its main contact has three positions: closing, opening and grounding. When its main contact is opened and grounded, it usually also drives a grounded auxiliary knife to close and ground through the linkage mechanism. In the traditional structure, the main shaft of the load switch drives the lever mechanism through the crank arm to drive the auxiliary knife pull rod connected with the grounding auxiliary knife to realize the opening and closing of the grounding auxiliary knife. In the existing structure of this type, due to the unreasonable setting of the shape of the lever mechanism and the position of the transmission link, the resistance in the transmission process is relatively large, resulting in the sticking of the moving parts and affe...

AI Technical Summary

Problems solved by technology

In the existing structure of this type, due to the unreasonable setting of the shape of the lever mechanism and the position of the transmission link, the resistance during the transmission process is relatively large, resulting in the sticking of the moving parts and affecting the reliable operation of the grounding auxiliary knife

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