Pressure reducing valve with pressure chamber

Abstract

The invention discloses a pressure reducing valve with a pressure cavity. The pressure reducing valve with the pressure cavity can change the output pressure of the pressure reducing valve by externally pressurizing or relieving the pressure of the pressure cavity. The pressure reducing valve with the pressure cavity comprises an adjusting assembly with a pressure cavity, a membrane, a valve coreassembly and a piston assembly, wherein the piston assembly is hermetically arranged in the adjusting assembly;and one end of the piston assembly is matched with a pressure regulating spring in the adjusting assembly, and the other end of the piston assembly is matched with the membrane. According to the scheme, the advantages of a membrane pressure reducer are retained, the membrane pressure reducer also has a safety protection function under the rupture of a membrane, when the membrane breaks down, a valve core cannot be completely opened even under the action of the spring force, and gas can still be normally conveyed; and furthermore, the membrane is only limited and protected by the inner pressure and the outer pressure, and the inner pressure is limited and protected by the piston assembly, so that the probability of rupture of the membrane is relatively low during breaking down, and the problems in the prior art are effectively overcome.

Description

technical field [0001] The invention relates to the technology of a pressure reducing valve, in particular to the technology of a pressure reducing valve with a pressure cavity (DOME). Background technique [0002] It is often necessary to use different gases in many fields of industry, such as industrial gas welding, laboratory inspection, semiconductor industry or food packaging industry and other fields. For the convenience of storage and transportation, gas is usually compressed and stored in high-pressure gas cylinders. When in use, the gas pressure must be reduced to the required pressure through a pressure reducing valve as needed. [0003] In specific applications, there is a single bottle used, and the pressure reducing valve only needs a single pressure reducing function. In order to facilitate centralized control and management, there are also application methods that use high-pressure gas cylinders for centralized gas supply. In addition to the decompression fun...

AI Technical Summary

Problems solved by technology

[0009] In view of the problems existing in the actual use of existing pressure reducing valves with pressure chambers, the purpose of the present invention is to provide a highly reliable solution for pressure reducing valves with pressure chambers

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