Electromagnetic self-closing valve

Abstract

The invention provides an electromagnetic self-closing valve. The electromagnetic self-closing valve is mainly characterized in that the waist portion of the interior of a valve cover is provided with an annular soft magnetic sheet, and the upper portion of the interior of the valve cover is provided with an electromagnetic coil and a support of the electromagnetic coil; an iron core is inserted into the middle of the support in a penetrating mode, the upper end of the iron core is in series connection with a carrying handle through a screw, the lower end of the iron core is closely connected with a pull rod, the end surface of the bottom of the pull rod is buckled with a membrane with a buckle, and an annular magnet is tightly fastened on the upper portion of the pull rod. According to the electromagnetic self-closing valve, when the valve is opened, normal output of gas is kept through the self gas pressure in a gas pipe network, and the valve is automatically closed when the pressure is dropped due to the fact that the pipe network gas is suddenly stopped; before gas supplying is recovered, a gas company does not need to send a person to visit a house to give notification, the gas can be supplied, and therefore labor is also saved; when gas leakage occurs, an alarm sends out an alarm sound, and the valve is automatically closed. The electromagnetic self-closing valve has the advantages that the structure is simple, the safety and reliability are achieved, and automatic close-distance control is easy to achieve due to the fact that the valve is connected with control equipment such as the alarm.

Description

technical field [0001] The invention relates to a pipeline gas valve, in particular to an electromagnetic self-closing valve. Background technique [0002] With the widespread popularization of urban gas applications, various gas accidents are also on the rise, causing huge casualties and losses to the safety of residents' lives and properties. In order to reduce the occurrence of gas accidents, there are generally two types of safety precautions commonly used in indoor installations: one is a mechanical overcurrent self-closing valve, which mainly uses the gas pressure of the gas pipeline network itself to maintain the normal output of gas, When the pipe network suddenly stops gas, the self-closing valve loses pressure and automatically closes under the action of spring or magnetic force, which can avoid the trouble of sending people to the door to notify the user to close all valves before gas supply; but this self-closing valve is harmful to gas The micro-leakage will no...

AI Technical Summary

Problems solved by technology

In order to reduce the occurrence of gas accidents, there are generally two types of safety precautions commonly used in indoor installations: one is a mechanical overcurrent self-closing valve, which mainly uses the gas pressure of the gas pipeline network itself to maintain the normal output of gas, When the pipe network suddenly stops gas, the self-closing valve loses pressure and automatically closes under the action of spring or magnetic force, which can avoid the trouble of sending people to the door to notify the user to close all valves before gas supply; but this self-closing valve is harmful to gas The micro-leakage will not be closed, let alone close-range control

The other is a solenoid valve with a leakage alarm. Its function is that when the gas leaks and reaches a certain concentration in the air, the alarm will sound an alarm and output current to reset the solenoid valve to cut off the gas output; but this The function of the solenoid valve is single, and it will not automatically close when the pipeline network suddenly stops gas in an accident. Before the pipeline network resumes gas supply, the staff of the gas company must come to the door to notify the user to close all gas valves to prevent secondary leakage

In this way, it consumes a lot of manpower and cannot guarantee the gas supply in time, which affects the normal life of the residents in the area.

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