Operating mechanism of three-station switch

Abstract

An operating mechanism for a three-position switch, which overcomes the problems of the existing operating mechanism that cause the overshoot of the three-position switch, the high failure rate of a state indicating device, and the easy change of the position of the three-position switch and easy misoperation. , is characterized by an electric drive part consisting of an electric motor, an electromagnetic clutch and an electric output gear, and consists of a manual operation selection plate assembly assembly, a padlock assembly, a display rotary rod device, a nut assembly assembly, an inner core assembly assembly, and a screw spindle assembly assembly. It constitutes a manually operated driving part with a mechanical clutch, and the beneficial effect is that it can effectively prevent the occurrence of overshoot and misoperation of the three-position switch and avoid the position change of the three-position switch; the mechanism state display device is matched with the switch set on the operation panel. The status symbol can accurately display the position of the three-position switch in real time. The display is intuitive and convenient, and the complicated gearbox structure is omitted.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution equipment, and in particular relates to an operating mechanism for a three-position switch used for opening and closing a three-position switch in medium and high voltage switchgear. Background technique [0002] In the prior art, the operating mechanism of the three-position switch used for gas-insulated metal-enclosed switches includes a spring mechanism and a gear transmission mechanism, which are mainly composed of a motor, transmission parts and operating parts. The existing technical problems are: [0003] (1) Since there is no measure to force stop when the operation is in place, if the control circuit fails during electric operation and the motor cannot stop in place, it will cause the three-position switch to overshoot, resulting in damage to the operating mechanism; [0004] (2) Since the status indicating device needs to be realized through a gear reduction m...

AI Technical Summary

Problems solved by technology

[0003] (1) Since there is no measure to force stop when the operation is in place, if the control circuit fails during electric operation and the motor cannot stop in place, it will cause the three-position switch to overshoot, resulting in damage to the operating mechanism;

[0004] (2) Since the status indicating device needs to be realized through a gear reduction mechanism, the structure is complex and the failure rate is high;

[0005] (3) Since there is no limit locking structure, turning the output shaft by external force may change the position of the three-position switch when no operation is performed;

[0006] (4) Since the manual operation holes for the isolation switch and the ground switch share one, it is easy to cause misoperation

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