Mass-flow balanced type pressure regulating valve

Abstract

The invention discloses a mass-flow balanced type pressure regulating valve which comprises a valve body (01), a valve cover (02), a valve plug (03), an input channel (106), an output channel (107) and a pressure reducing structure. The pressure reducing structure is a single-stage pressure reducing structure, a piston (10) is arranged in the single-stage pressure reducing structure, one end of the piston (10) is contacted with the valve plug (3) through a compression bar (05), and the other end of the piston (10) is contacted with a regulating spring (19). According to the technical scheme, the single-stage pressure reducing is achieved, a piston type structure is adopted by a pressure reducing cavity, the piston assembly of the mass-flow balanced type pressure regulating valve is different from a traditional diaphragm type structure, and therefore the risk of damaging of a diaphragm caused by mass flow and large pressure fluctuation is reduced.

Description

technical field [0001] The invention belongs to the technical field of pressure regulating valves for liquid or gas. More specifically, the present invention relates to a high flow balanced pressure regulator. Background technique [0002] In the current domestic and foreign markets, large-flow regulators (such as flow rates greater than 100 Nm3 / h) mostly use traditional diaphragm structures. High, diaphragm structure is suitable. [0003] However, with the application of various fuel gases such as compressed natural gas (CNG) or liquids such as liquefied natural gas (LNG) in the automotive industry, traditional diaphragm pressure regulators often show many disadvantages under complex working conditions , such as rupture and wear of the diaphragm; inadaptability to the low temperature environment; and vibration of large flow and strong airflow, etc., directly affect the quality and service life of the product. [0004] However, other structures on the market, such as the ...

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Problems solved by technology

[0003] However, with the application of various fuel gases such as compressed natural gas (CNG) or liquids such as liquefied natural gas (LNG) in the automotive industry, traditional diaphragm pressure regulators often show many disadvantages under complex working conditions , such as the rupture and wear of the diaphragm; the inadaptability to the low temperature environment; and the vibration of large flow and strong air flow, etc., directly affect the quality and service life of the product

[0004] However, other structures on the market, such as the piston structure, mostly use multi-stage decompression, which is complicated in structure and high in cost; the bellows structure has high requirements for bellows and high cost

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