A program lock device of a three-station electric mechanism and its application method

Abstract

The invention discloses a program lock device of a three-station electric mechanism and an application method of the program lock device. The device comprises a working position locking and unlockingdevice and an automatic reset device, wherein the working position locking and unlocking device comprises a half shaft, a position control driven cam, a position control driving cam and a power cam, the control driving cam is hinged with an intermittent movement mechanism, the intermittent movement mechanism is formed by matching of a movement top plate and the control driven cam, a limitation mechanism is formed by matching of the half shaft and the power cam, the automatic reset device comprises a transition flange and a guide support, the transition flange and the guide support are fixedlyarranged at two sides of one wall of a mechanism box, a lock rod of a program lock extends to the guide support by the transition flange, a push rod and a reset spring are arranged in the guide support, the reset spring can be used for allowing the push rod to automatically reset, and the push rod is hinged with the position control driving cam via a connection rod. By the device, a breaking position of the three-station mechanism is locked by the program lock after locking, and accidental action caused by a manual operation fault is prevented from the aspect of operation flow control.

Description

technical field [0001] The invention relates to a program lock device of a three-position electric mechanism used in a high-voltage isolation and grounding three-position switch and a method for using the same. Background technique [0002] In high-voltage power transmission and transformation systems, SF6 gas-insulated fully enclosed combined electrical appliances (GIS) are currently widely used as important equipment for system operation and system protection, including operating units such as circuit breakers, isolating switches, and grounding switches. In order to reduce the cost, the isolating switch and the grounding switch are generally designed in one air chamber, and a three-position electric mechanism realizes the opening and closing operations of the isolating switch and the grounding switch respectively. The operation of the system needs to strictly follow the operating procedures. For example, when the system is closed, the isolating switch should be closed firs...

AI Technical Summary

Problems solved by technology

However, this structure cannot be applied to a three-station mechanism. If we learn from this design idea and use the program lock head to directly clamp the output shaft of the mechanism to achieve the purpose of locking the position isolating switch, at this time it is the same as the grounding switch that is combined with the isolating switch. Inability to move, which is contrary to the operating procedure

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