Interlocking device of metal-enclosed switchgear grounding switch and cable room door

Abstract

The invention discloses an interlocking device of a metal-enclosed switchgear grounding switch and a cable room door, comprising a bracket part, a driver plate, a mechanism stopper and a locking branch part. The upper part of the bracket part is matched with the driver plate, and the lower part of the bracket part is matched with the cable room door. The driver plate is connected with the locking branch part which can cover an operational shaft of the grounding switch. The mechanism stopper is fixed on the operational shaft of the grounding switch and is matched with the driver plate. The bracket of the bracket part is of L-shaped multiple-flange structure. Two L-shaped adjacent flanges of the bracket are provided with a rectangular slot. The driver plate can be inserted into the rectangular slot. The lower end of the other L-shaped edge of the bracket is provided with a hole. A lock catch plate is installed by a treaded pin and rotates around the treaded pin which is taken as a basic moving point. The V shape of the upper end part of the lock catch plate is matched with the lower end part of the driver plate. The lower part of the lock catch plate is provided with cylindrical pins. The secondary cylindrical pin is provided with a reset spring, and the first cylindrical pin is matched with a lug which is fixed on the cable room door.

Description

technical field [0001] The invention relates to an interlocking device for an indoor box-type AC metal-enclosed switchgear grounding switch and a cable room door, in particular to an interlocking device for a 12kV indoor box-type AC metal-enclosed switchgear grounding switch and a cable room door. Background technique [0002] The opening method of the cable compartment door of the existing 12kV indoor box-type AC metal-enclosed switchgear is an upward flap structure, and the interior is riveted and assembled with high-strength sheet metal parts. When the indoor box-type AC metal-enclosed switchgear is in normal operation, the operator can open the door of the cable room at will and enter the charged interval by mistake, which seriously violates the safety requirements of 12kV switchgear. Therefore, it is necessary to install a grounding switch between the door of the cable room. Interlocking devices to meet safety requirements. [0003] The interlocking device of the exist...

AI Technical Summary

Problems solved by technology

[0003] The interlocking device of the existing 12kV indoor box-type AC metal-enclosed switchgear grounding switch and the cable room door is to use the "three-station" operating mechanism to transmit the movement of the main shaft to realize the interlocking of the cable room door. See figure 1 The "three-station" operating mechanism main shaft 30 is coaxially connected with the main switch of the equipment. The interlocking device 33 has a complicated structure and is inconvenient to use and install. Due to the transmission of the operating mechanism main shaft 30, it has a certain impact on the opening and closing performance of the main switch. ; Since the cable chamber door 14 adopts an upward-turning structure, the upper end of the door has a lock hole to cooperate with the interlock device 33 lock bar 31 to complete the locking, so when the switchgear SF 6 After the sealed gas box 32 is effectively deformed, the installation of the operating mechanism 13 and the interlock device 33 is driven to deviate, which greatly affects the cooperation between the interlock device 33 and the cable chamber door 14, and reduces the reliability of the interlock

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