A switch cabinet and its operating mechanism and linkage mechanism

Abstract

The invention provides a switch cabinet, and an operating mechanism and a linkage mechanism thereof. The linkage mechanism comprises an operating mechanism transmission main shaft, a circuit breaker transmission main shaft and a protection switch transmission main shaft, wherein a revolving member is assembled on the operating mechanism transmission main shaft in a standstill locking manner, a first driven member is assembled on the circuit breaker transmission main shaft in the standstill locking manner, and a second driven member is assembled on the protection switch transmission main shaft in the standstill locking manner; a first keyseat matched structure is arranged on each of the revolving member and the first driven member correspondingly, and the revolving member realizes separation and reunion with the first driven member through the corresponding first keyseat matched structure in the revolving process and drives the first driven member to revolve in at least one section of set journey in the revolving process of the revolving member; a second keyseat matched structure is arranged on each of the revolving member and the second driven member correspondingly, and the revolving member realizes separation and reunion with the second driven member through the corresponding second keyseat matched structure in the revolving process and drives the second driven member to revolve in at least one section of set journey in the revolving process of the revolving member. The linkage mechanism is convenient in operation, relatively low in failure rate, safe and reliable.

Description

technical field [0001] The invention relates to high-voltage switchgear, in particular to a switchgear and its operating mechanism and linkage mechanism. Background technique [0002] The main function of the switchgear is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, grounding switches, load switches, operating mechanisms, transformers and various protection devices. We collectively refer to the isolating switch and the grounding switch as the protective switch mechanism. When the power supply line or equipment fails and during normal maintenance, the operator needs to disconnect the circuit breaker and perform corresponding operations on the protective switch mechanism (that is, disconnect the isolating switch, close After turning on the grounding switch), the...

AI Technical Summary

Problems solved by technology

[0003] The current switchgear generally includes a circuit breaker operating mechanism and a protective switch mechanism (that is, an integrated three-position isolation mechanism or a separate two-position isolation mechanism and a two-position grounding mechanism), which are used for linkage circuit breakers and protection The linkage mechanism of the switch mechanism (that is, the isolation switch and / or the grounding switch) has a complicated structure. When the switch cabinet needs to be overhauled, the operator needs to operate the protection switch mechanism four or even six times during a stop and power transmission process. , the operation process is very troublesome, the failure rate is high, and there are potential safety hazards

Moreover, the operation of this linkage mechanism is difficult. Once the operator makes an operation error, such as opening the isolating switch before the circuit breaker is disconnected, or opening the cable compartment door when the isolating switch is not disconnected, it may lead to a safety accident.

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