Switch cabinet back door and ground switch interlocking mechanism

Abstract

The invention discloses a switch cabinet back door and ground switch interlocking mechanism, which comprises a bent plate I and a shaft sleeve fixed to the front wall of a mounting beam in a switch cabinet respectively, a bracket plate fixed to the back wall of the mounting beam, a top plate and a hook plate fixed to the inner wall of a switch cabinet back door, and a bent plate II fixed to the inner wall of the front cabinet body of the switch cabinet; and the mechanism also comprises a brake cable pipe, a brake cable, a shaft, a stop pin and a top rod. When the switch cabinet back door is closed, a ground switch operating handle can be inserted in a ground switch operating hole and is sleeved to a ground switch operating end head; and when the switch cabinet back door is opened, the ground switch operating handle cannot be inserted in the ground switch operating hole. The interlocking mechanism meets ''five-prevention'' function of the switch cabinet, can effectively ensure safety of overhauling personnel, improves reliability and practicality, and has the characteristics of strong completeness, convenient installation, high adaptability and the like.

Description

technical field [0001] The invention relates to an interlock mechanism applied to a switch cabinet. Background technique [0002] The interlocking mechanism between the back door of the switchgear and the grounding switch is designed to meet the "prevention of entering the charged interval" in the "five preventions" requirements of the switchgear. Its function is: when the staff operates the grounding switch, when the grounding switch is closed, , the back door can be opened for personnel to enter for maintenance; when the back door is opened, the grounding switch cannot be opened; when the back door is closed, the grounding switch can be opened. It can effectively prevent the maintenance personnel from entering the electrified compartment by mistake. [0003] Due to the large torque of the operating handle of the earthing switch, if an interlock is added to the earthing switch itself, due to the lever principle of the operating handle of the earthing switch, the strength o...

AI Technical Summary

Problems solved by technology

[0004] (1) The interlocking mechanism has a long action path and a large force, and the interlocking parts are easily deformed by force;

[0005] (2) The interlocking structure is complicated to process and difficult to debug;

[0006] (3) The interlock mechanism passing through the high-voltage compartment will have an adverse effect on the insulation of the switchgear;

[0007] (4) The link-type interlocking mechanism requires multiple connecting rods to connect. When the distance is large, the deformation and clearance of the interlocking parts will increase the transmission error, and the transmission accuracy is difficult to guarantee.

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