A safety self-closing valve for gas pipes

The gas pipeline self-closing valve, with its single valve port and single valve core structure, utilizes a piezoelectric diaphragm and a micro motor to drive gear meshing to achieve automatic protection against overpressure and underpressure. This solves the problems of complexity and easy failure of existing gas self-closing valve structures, and improves response speed and safety.

CN224469756UActive Publication Date: 2026-07-07ZHEJIANG SHIYA GAS VALVE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG SHIYA GAS VALVE CO LTD
Filing Date
2025-08-14
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing gas self-closing valves have complex structures, and the coordinated operation of multiple valve ports can easily lead to jamming and wear, increasing assembly difficulty and making them prone to failure, thus failing to effectively prevent gas leakage.

Method used

It adopts a single valve port and single valve core structure. Through the meshing of the piezoelectric film sensing component and the micro motor drive gear, it realizes automatic protection against overpressure and underpressure, simplifies the transmission link, and uses the piezoelectric film sensing component to distinguish abnormal conditions and trigger the micro motor drive gear to rotate, which drives the valve stem to move upward to close the valve port.

Benefits of technology

It improves the response speed of gas pipeline self-closing valves in emergency situations, reduces the risk of leakage caused by failure of multi-valve coordinated operation, and ensures the integrity and response speed of safety functions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224469756U_ABST
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Abstract

The utility model discloses a kind of gas pipeline safety self-closing valves, including self-closing valve main body, gas passage, valve core and valve rod, the inside of self-closing valve main body is provided with gas passage, and the inside of gas passage is provided with detection cavity on one side, the inside of detection cavity is provided with response component, the central position in the inside of self-closing valve main body is provided with valve port, and the inside of valve port is provided with valve seat, the central position of valve seat is passed through with valve rod, and the bottom of valve rod is provided with valve core, the top end in the inside of self-closing valve main body is provided with drive cavity, the top of valve rod extends to drive cavity inside.The utility model is equipped with self-closing valve main body, gas passage, detection cavity, response component, valve core, valve rod, rack, gear and micro motor, realize the protection of two dangerous working conditions of overpressure and pressure loss by same set of actuating mechanism, both ensure the integrity of safety function, and simplify transmission chain.
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