Interlocking mechanism used for electric cabinet

Abstract

The invention relates to an interlocking mechanism used for an electric cabinet. The interlocking mechanism comprises a ground interlocking part, a pull wire, a wire pipe, an overall assembling part and a lower door interlocking part. The lower door interlocking part comprises a ground interlocking plate, a ground interlocking shaft, a ground interlocking spring, a ground interlocking wire, a ground interlocking frame, a lower door interlocking plate, a lower door interlocking shaft, a lower door interlocking spring, a lower door interlocking wire and an interlocking support. By means of the interlocking mechanism used for the electric cabinet, an electromagnetic lock is used for controlling a spring bolt to move, the spring bolt drives a first limiting support and a second limiting support in the assembling part to move, the first limiting support is used for controlling the pull wire to move so that in the running period of the equipment, a lower door is clamped through lock closing,and a door closing handle cannot be operated; and during lock opening, the power failure is achieved through the door closing handle, the interlocking support moves downwards to disengage from a lower door, people can conveniently open a cabinet door to check the electric cabinet, thus, safety and reliability of the interlocking mechanism are enhanced, and the equipment practicability is improved.

Description

technical field [0001] The invention relates to the field of interlocking equipment, in particular to an interlocking mechanism for an electrical cabinet. Background technique [0002] The interlocking mechanism of high-voltage electrical cabinets is an important measure to ensure equipment and personal safety and prevent misoperation. This is clearly stipulated in "3-35kV AC Metal-enclosed Switchgear" (GB3906-91). This national standard describes "interlock" as "metal-enclosed switchgear shall have: ;Prevent mis-dividing and mis-closing of circuit breakers, load switches, and contactors; prevent closing of circuit breakers, load switches and other switches when the grounding switch is in the closed position; prevent mis-closing of grounding switches when re-energized; prevent people from entering electrified compartments by mistake, etc. Function", the above five items to prevent electrical misoperation, referred to as "five prevention". [0003] In order to achieve the p...

AI Technical Summary

Problems solved by technology

[0003] In order to achieve the purpose of five defenses, mechanical interlocking is usually used to achieve the locking requirements of successive actions between the operating parts of the high-voltage switchgear with mutual restraint and linkage. The existing mechanical overall assembly parts generally have a safety factor Low, the safe operation of the equipment cannot be guaranteed. When the electrical cabinet is in working state, others can easily open the cabinet door to operate inside. In the case of power failure, the equipment will also enter the running state due to misoperation by the personnel inside the cabinet. The personal safety of equipment and surrounding personnel is harmful, which greatly reduces the safety and reliability of the existing electrical cabinet interlocking mechanism

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