Pressure reducing valve for high-pressure gas

Abstract

The invention discloses a pressure reducing valve for high-pressure gas. The pressure reducing valve for the high-pressure gas comprises a valve body, and a cover which is arranged on the valve body, wherein the valve body is provided with an inner chamber, an outer chamber, a gas inlet and two gas outlets; the gas inlet communicates with the inner chamber, and the two gas outlets communicate with the outer chamber; a spring is arranged in the cover; a piston rod is arranged in the outer chamber; one end of the spring is propped to the inner wall of the cover through an upper spring seat, and the other end of the spring is propped to the piston through a lower spring seat and a plurality of adjusting cushions; the piston is pressed to an opening of the outer chamber through the spring; a first sealing ring is arranged between the piston and the inner wall of the valve body; the outer chamber is separated from the inner part of the cover through the piston and a first sealing ring; a ventilating hole is formed in the top part of the cover, and the inner part of the cover communicates with outside air through the ventilating hole; the piston is provided with an air flowing channel through which the outer chamber communicates with the inner chamber; a valve element is arranged in the air flowing channel; a gap is formed between the valve element and the air flowing channel. According to the pressure reducing valve for the high-pressure gas, all performance parameters of the pressure reducing valve are applicable to the pressure reduction of pipelines of a hydrogen fuel cell motor vehicle.

Description

technical field [0001] The invention relates to a high-pressure gas decompression valve, which is mainly used for decompression of hydrogen fuel cell pipelines in the newly developed new energy automobile industry. Background technique [0002] The gas tanks for CNG fuel vehicles in the prior art do not require very high pressure, temperature, vibration, impact, etc., the pressure is low, the various seals are well sealed, the joints can be welded, and various test environments can be changed without much change. test. The gas pressure reducing valve specifications for CNG energy vehicles are as follows: [0003] A. At present, the inlet of the pressure reducing valve for CNG fuel vehicles is generally below 25MPa, and the pressure reduction at the inlet and outlet is relatively small, generally 10-30; [0004] B. The operating temperature is mostly at room temperature -20~50°C; [0005] C. It cannot withstand the impact of more than 8g and the vibration of more than 4g. ...

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Problems solved by technology

[0005] C. Cannot withstand the impact of more than 8g and the vibration of more than 4g

[0006] In the field of new clean energy vehicles, in order to save energy and reduce the emission of vehicle pollutants, a new hydrogen fuel cell vehicle is proposed. At the same time, it is required that the valve products used in this field have a high pressure, and the mileage of a hydrogen fuel vehicle is comparable to that of an ordinary fuel vehicle. The mileage is quite equal, which makes the performance parameters of the original natural gas vehicle pressure reducing valve no longer applicable

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