Self-locking stop valve

By setting multi-stage sealing grooves in the inlet channel and using a self-locking design with load-bearing blocks and magnetic plates, the problem of poor sealing in existing gate valves is solved, achieving efficient sealing and low-cost maintenance of the self-locking gate valve.

CN116292930BActive Publication Date: 2026-07-14WENZHOU JINXIN BIOLOGICAL CHEM VALVE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WENZHOU JINXIN BIOLOGICAL CHEM VALVE CO LTD
Filing Date
2022-11-28
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

When the water flow is cut off, the water pressure in the inlet channel of the existing gate valve is greater than that in the outlet channel. This causes the valve plug to wear out and be easily pushed, resulting in the medium flowing into the outlet channel from the gap between the valve plug and the connection port, resulting in poor sealing performance.

Method used

A self-locking gate valve is designed, with the valve plug located in the inlet channel. Multi-stage sealing is achieved through multi-stage sealing grooves and sealing rings. Combined with the attraction of the load-bearing block and the magnetic plate, the sealing performance between the valve plug and the connection port is enhanced. The valve plug and valve body structure can be disassembled and replaced, reducing the impact of wear.

Benefits of technology

It achieves a multi-stage sealing effect when the water flow is cut off, reduces the replacement cost after valve plug wear, improves sealing performance and stability, and prevents water leakage.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116292930B_ABST
    Figure CN116292930B_ABST
Patent Text Reader

Abstract

The application relates to the technical field of stop valves, and discloses a self-locking stop valve which comprises a valve body, a valve cover detachably connected to the valve body, a valve rod penetrating through the valve cover, a valve plug arranged at the bottom end of the valve rod, sealing packing filled between the valve rod and the valve cover, a pressing cap for compacting the sealing packing, the valve rod being threadedly connected to the valve body, an inlet channel, an outlet channel and a connecting port being arranged in the valve body, the valve plug comprising a first sealing plug and a second sealing plug integrally formed on the lower side of the first sealing plug, the diameter of the first sealing plug gradually increasing from top to bottom, and the diameter of the second sealing plug being larger than the maximum diameter of the first sealing plug; a first sealing groove and a second sealing groove being arranged in the side wall of the connecting port, the second sealing groove being arranged in the lower side of the first sealing groove in communication, and a sealing ring being embedded in the circumferential side wall of the first sealing plug. When cutting off water flow, water is not easy to flow into the outlet channel from the gap between the valve plug and the connecting port, and the sealing performance is good.
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