Interlocking device for lower door of gas-insulated switchgear

Abstract

The invention, which relates to the technical field of interlocking of a gas-insulated ring main unit, discloses an interlocking device for a lower door of a gas-insulated switchgear. The interlockingdevice comprises a gas-insulated switchgear, a grounding switch, a power-on switch, a lower door assembly and an interlocking assembly. The lower door assembly includes a lower door and lower door guide shafts arranged at the two sides of the gas-insulated switchgear; the lower door can be fixed to the lower door guide shafts; and the lower door guide shafts can limit the freedom degree of the lower door in a direction perpendicular to the lower door. Besides, the interlocking assembly includes a lifting rod capable of sliding up and down; and the lifting rod is connected to the lower door. When the lower door is not fixed to the lower door guide shafts, the interlocking assembly can shield the grounding switch and the power-on switch. When the lower door is fixed on the lower door guideshafts, the lower door can drive the interlocking assembly not to shield the grounding switch and the power-on switch any more through the lifting rod. According to the interlocking device, the explosion-proof performance of the lower door is improved; the installation mode of the lower door is optimized; and the interlocking function of the lower door to the gas-insulated ring main unit is realized.

Description

technical field [0001] The invention relates to the technical field of interlocking of an inflatable ring network cabinet, in particular to an interlocking device for a lower door of an inflatable cabinet. Background technique [0002] At present, the lower door of the traditional inflatable ring network cabinet is fixed by fixing the top of the lower door to three lifting rods and inserting the bottom of the lower door into the card slot of the inflatable ring network cabinet. When installing the lower door, the lifting rod is fixed on the inflatable ring network cabinet . Due to sheet metal manufacturing errors and component assembly errors, there will always be three lifting rods or bottom slots that cannot be smoothly inserted into the corresponding holes of the lower door during assembly, so the assembler will use a file to file the corresponding holes to solve the problem, resulting in The assembly efficiency is reduced, the interchangeability of the lower door is ext...

AI Technical Summary

Problems solved by technology

Due to sheet metal manufacturing errors and component assembly errors, there will always be three lifting rods or bottom slots that cannot be smoothly inserted into the corresponding holes of the lower door during assembly, so the assembler will use a file to file the corresponding holes to solve the problem, resulting in The assembly efficiency is reduced, the interchangeability of the lower door is extremely poor, and the meaning of standardized production is lost

[0003] Moreover, the degree of freedom of the lower door in the prior art in the front and rear directions of the inflatable cabinet is only limited by the bottom card slot, and the single side restriction leads to poor explosion-proof performance of the lower door. Once the cable room explodes, the lower door is easy to fly out. At this time, someone happens to be at the door panel, and it is easy to cause harm to the human body.

Furthermore, the current lower door lacks an interlock function for the inflatable ring network cabinet, which leads to the risk of electric shock for personnel when replacing the lower door

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