Mechanical locking structure for two inlet wire switches of ring main unit and ring main unit

By adopting the vertical insertion separation mechanism of the program lock and the locking sleeve in the ring network cabinet, safe single-circuit closing control of the two-way incoming line switches in the ring network cabinet is achieved, solving the short-circuit risk caused by misoperation of the dual-way incoming line cabinet and ensuring the safety and stability of the power supply.

CN223378072UActive Publication Date: 2025-09-23ANPU DIKANG ELECTRIC TECH CO LTD
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Patent Information

Application Number
CN202421831675.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2025-09-23
Estimated Expiration
2034-07-31

AI Technical Summary

Technical Problem

The existing ring main unit lacks an effective mechanical locking structure when the dual-line incoming cabinets are connected to independent power systems, resulting in the risk of short circuit caused by misoperation, affecting the safety and stability of power supply.

Method used

A mechanical locking structure for ring main unit is designed. It uses two program locks and a key. Through the cooperation of the locking rod and the locking shaft sleeve, it ensures that only one incoming line cabinet can be closed and the other line remains open. It includes the vertical insertion and separation mechanism of the lock body, lock core, locking rod and locking shaft sleeve.

Benefits of technology

It realizes single-circuit closing control with simple structure, easy operation, safety and reliability, reduces the risk of short circuit caused by misoperation, and ensures the continuity and reliability of power supply.

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Abstract

The utility model provides a mechanical locking structure for two inlet wire switches of a ring main unit and the ring main unit, and relates to the technical field of ring main unit inlet wire switch closing control, and the mechanical locking structure comprises two program locks, a key and two locking shaft sleeves. The program lock comprises a lock body, a lock cylinder and a lock rod, the lock cylinder is arranged in the lock body and is configured to allow a key to be inserted, the insertion direction of the lock rod and the insertion direction of the key are perpendicular to each other, the lock rod is configured to be capable of ascending or descending under the driving of the key, and the key is configured to be locked in the lock cylinder when the key is driven to be folded. The two locking shaft sleeves are respectively arranged corresponding to isolating switch operation main shafts of two incoming lines, each locking shaft sleeve comprises a first part and a second part which are coaxially connected, the isolating switch operation main shafts are sleeved with the first parts, and the second parts are provided with notches allowing the locking rods to be inserted therein. The mechanical locking structure can reliably and safely meet the single-path closing requirement of the existing ring main unit.
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