Novel switch cabinet back door interlocking mechanism

Abstract

The invention relates to a novel switch cabinet back door interlocking mechanism, which comprises a main shaft, a mechanism internal part, a mechanism external part, an unlocking part and a spring. The section of the mechanism external part is rectangular with an opening, an open hole inner boss is arranged on one side of the rectangular section, a connection hole is disposed on the corresponding side of the rectangular section, the section of the mechanism internal part is in an inverted T shape, two ends of the mechanism internal part are connection ends, one of the connection ends is an inner air spring connection end, one end of the main shaft is an inner air spring connection end as well, and the spring is connected between the mechanism internal part and the main shaft. The novel switch cabinet back door interlocking mechanism is simple, convenient to operate, and capable of greatly improving the safety of the switch cabinet.

Description

technical field [0001] The invention relates to an interlocking device, in particular to a rear door interlocking device of a switch cabinet, belonging to the technical field of switch cabinet accessories. Background technique [0002] The switchgear is a kind of power transmission and distribution equipment, so its safety requirements are relatively high. In order to ensure the personal safety of the operator, when the switch cabinet is powered on, the rear door is locked by an interlocking device. The rear door interlocking device is one of the key "five-proof interlocking" devices in the switch complete set of equipment, which is used to prevent accidental entry into the live compartment. Without a reliable interlocking structure, it is impossible to protect the safety of personnel, so its quality, mechanical performance, and reasonable structure are directly related to the safety of the operation of the switch complete set of equipment. [0003] At present, the back do...

AI Technical Summary

Problems solved by technology

The electromagnetic lock method is a non-mechanical interlocking method, which is unreliable; external environmental factors have a relatively large impact on it, and the strong magnetic field of the power distribution equipment is likely to interfere with the electromagnetic lock, which will cause malfunction; in the case of abnormal power failure of the secondary power supply, the interlocking Failure to operate will cause difficulty in operation or maintenance, and the chain is unreliable

The simple rotary rear door interlocking structure cannot achieve reversible interlocking; that is, when the rear door is closed and the main switch is pushed to the working position, the rear door can be locked, but when the rear door is opened and the maintenance status is entered, the drive-in prevention and maintenance cannot be realized. There is a huge potential safety hazard in operating the interlock function of the main switch, and the interlock is unreliable

90°rotating reversible rear door interlocking, simple structure, reversible action, but there are defects such as cabinet deformation, main shaft lock block dislocation, etc., resulting in interlocking failure, mechanism jamming and other adverse consequences, eventually resulting in interlocking failure, poor safety, and endangering personnel's life

Therefore, unreasonable, irreversible, and invalid back door interlocking devices will reduce the reliability and safety of switchgear and threaten personal safety

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