A five-proof mechanical interlock

Abstract

The invention provides a five-prevention mechanical interlock. The five-prevention mechanical lock comprises at least two connected lock parts, wherein a channel is formed between every adjacent lock parts, and a connection rod capable of sliding in the channel is arranged in each channel; each lock part comprises a bottom casing and an upper cover, a limiting hole used for limiting insertion and pulling of a key is formed in the upper cover, a key position corresponding to the limiting hole is formed in the bottom casing, a lock bar is arranged at the lower part of the key position and horizontally penetrates through the bottom casing, a shifting position and a stop position are arranged on the lock bar, when the key rotates to drive the lock bar to move, the connection rod can extend into the shift position or the stop position of an adjacent lock bar, and a first clamping part and a second clamping part which are used for limiting movement of the lock bar are arranged on the side edge of the lock bar. The five-prevention mechanical interlock completely uses a mechanical structure during locking, program setting is not required, the stability is high, besides, the multiple lock parts are connected for use through the connection rods, and the five-prevention mechanical interlock is matched with an electric cabinet during use and is simple to operate.

Description

technical field [0001] The invention relates to the field of locks, in particular to a five-proof mechanical interlock. Background technique [0002] At present, in order to ensure personal safety, high-voltage electrical equipment should be equipped with circuit breakers to prevent mis-opening and closing, to prevent disconnecting and closing isolating switches with loads, to prevent live hanging (closing) grounding (grounding switches), to prevent power transmission with ground wires, and to prevent There are five anti-mistake functions for straying into the electrified interval, and these five preventions are the most important part of electric power safety. At present, there are many types of operating mechanisms for fixed high-voltage switchgear, and the interlocking between them and circuit breakers is also in different forms. Some are made of cast iron The rigid interlocking mechanism made of cast iron parts, due to rough processing of cast iron parts, large errors, d...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to ensure personal safety, high-voltage electrical equipment should be equipped with circuit breakers to prevent mis-opening and closing, to prevent disconnecting and closing isolating switches with loads, to prevent live hanging (closing) grounding (grounding switches), to prevent power transmission with ground wires, and to prevent There are five anti-mistake functions for straying into the electrified interval, and these five preventions are the most important part of electric power safety. At present, there are many types of operating mechanisms for fixed high-voltage switchgear, and the interlocking between them and circuit breakers is also in different forms. Some are made of cast iron The rigid interlocking mechanism made of cast iron parts, due to rough processing of cast iron parts, large errors, difficult assembly, poor reliability of interlocking, and hidden installation, invisible, unintuitive and clear operation, unable to find and eliminate faults at the first time, very easy Cause misoperation and destructive operation, resulting in potential safety hazards and damage to equipment; there is also a method of program lock to achieve "five defenses" interlocking, the program is complicated and the operation is slow, requiring the operator to have a clear mind and a high degree of proficiency in operation , if something is wrong, you have to start over, which will affect the power supply efficiency

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