A mechanical locking device for preventing five faults of an electric cabinet and a gas insulated switchgear

By employing a mechanical interlocking device consisting of two locks and a key-operated program lock in the electrical cabinet, the problem of accuracy in long-distance mechanical transmission interlocking is solved, ensuring that the back door can only be opened when the circuit breaker is closed, preventing accidental entry into the energized compartment, and improving safety.

CN121565710BActive Publication Date: 2026-07-21TIANJIN PINGGAO INTELLIGENT ELECTRIC +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN PINGGAO INTELLIGENT ELECTRIC
Filing Date
2025-11-27
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the existing technology, gas-insulated metal-enclosed switchgear with the cable compartment located behind the gas-insulated switchgear suffers from poor accuracy when mechanically transmitting and interlocking over long distances, resulting in complex mechanical transmission and insufficient safety.

Method used

An electrical cabinet five-proof program mechanical interlocking device is adopted. Through a set of two locks and one key program lock, the interlocking relationship between the closing interlocking plate and the opening interlocking plate and the circuit breaker mechanism is utilized to ensure that the back door can only be opened when the circuit breaker is in the closed state, and the circuit breaker cannot be opened otherwise, thus achieving precise mechanical transmission interlocking.

Benefits of technology

It improves the accuracy of long-distance mechanical transmission interlocking, enhances the five-proof functions of gas-insulated switchgear, prevents accidental entry into energized compartments, and improves the safety performance of the product.

✦ Generated by Eureka AI based on patent content.

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    Figure CN121565710B_ABST
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Abstract

The application discloses a five-prevention procedure mechanical locking device of an electric appliance cabinet and a gas insulated switchgear, and belongs to the technical field of electric appliance cabinets. The device comprises a locking support, a closing locking plate movably arranged on the locking support, and a closing switch of a circuit breaker is locked by the closing locking plate in a first position. The closing switch is unlocked by the closing locking plate in a second position. The closing switch of the circuit breaker in an open state is located on a path of the closing locking plate moving from the second position to the first position. An opening locking plate is linked with the closing locking plate. The opening locking plate locks an opening electromagnet when the closing locking plate is in the first position, and the opening locking plate unlocks the opening electromagnet when the closing locking plate is in the second position. A two-lock-one-key procedure lock comprises a first procedure lock for locking a rear door and a second procedure lock for driving the closing locking plate to move. The closing locking plate is in the first position when the second procedure lock is locked. The closing locking plate is in the second position when the procedure lock is unlocked. The application solves the problem of poor accuracy of long-distance mechanical transmission.
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