Special economical pressure regulating valve for welding heat-insulating gas cylinder

Abstract

A special economical pressure regulating valve for a welding heat-insulating gas cylinder comprises a regulator, a valve deck, a valve body and a valve base. The regulator penetrates through the valve deck, the valve deck and the valve body are embedded in each other through their threads, the valve base is screwed into the bottom of the valve body, a diaphragm is arranged on the top face of the valve body, a valve cavity is formed in the middle of the valve body, the valve cavity is communicated with a valve port formed in the top face of the valve body, a sealing ring is arranged in an inner circle of the valve port, the valve port is covered with a patch, and a valve of an I-shaped structure is arranged in the valve cavity. Thus, the problem that the patch blocks the valve port in the re-pressurizing process of the regulator is solved; excessive gas in the steel cylinder is used preferentially, resources are saved, and meanwhile the pressurizing rate is increased. When the valve port is not closed, the opening distance between a valve element and the valve port is controlled between 1.2 mm and 1.5 mm through a limiting platform boundary, the deformation amount of the diaphragm is reduced, and the service life and the sealing persistence of the diaphragm are guaranteed.

Description

technical field [0001] The invention relates to the field of on-off valves, in particular to an economical pressure-regulating valve specially used for welding heat-insulating gas cylinders. Background technique [0002] The development of current industrial technology has widely used oxygen, nitrogen, argon, neon, helium and other gases with a purity of 99.99% or even higher. In order to better store these gases, these gases will be stored in liquid form. In order to use these gases more conveniently, a special pressure regulating valve is installed on the top of the cylinder to control the pressure inside the cylinder when the gas is used. [0003] There are two types of traditional pressure regulating valves. One is the American REGO pressure regulating valve, which uses a 3mm thick ejector rod connected to the valve core to realize force transmission. When the working pressure of the inner tank exceeds the set value of the regulator, the economical passage can be opened...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a special economical pressure regulating valve for welding insulated gas cylinders to solve the problems of slow pressurization speed in the steel cylinder after the existing pressure regulating valve is used, short service life of the diaphragm, poor sealing effect and insufficient priority of excess gas in the cylinder. Use causes waste of resources and brings certain safety hazards

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