Pipe type fuel gas pressure-relief device

Abstract

The invention discloses a pipe type fuel gas pressure-relief device. The device comprises a pipe body, a fixing body, a spring, a piston and ventilating holes, wherein the two ends of the pipe body are provided with connecting threads, the space in the pipe body is composed of a high-pressure cavity and a low-pressure cavity, and the inner diameter of the high-pressure cavity is smaller than that of the low-pressure cavity; the fixing body is arranged in the low-pressure cavity and connected with the inner surface of the low-pressure cavity, and a gap for gas to pass through is formed in the fixing body; one end of the spring is connected with the fixing body; the piston is connected with the other end of the spring, and the piston is pushed by the spring to be tightly attached to the end of the high-pressure cavity; the ventilating holes are evenly formed in the pipe wall of the low-pressure cavity, the two ends of each ventilating hole are both communicated with the internal space of the low-pressure cavity, and the ventilating holes are located between the fixing body and the ends of the high-pressure cavity. The pipe type fuel gas pressure-relief device is simple in structure, small in size and capable of being conveniently connected with a fuel gas conveying pipe. Due to the pipe type fuel gas pressure-relief device, fuel gas flow turbulence can not be caused, and the situation that the flame state is not stable is avoided.

Description

technical field [0001] The invention relates to the field of gas transportation, in particular to a gas decompression device. Background technique [0002] The gas needs to be kept at high pressure during the transportation process, and the gas pressure needs to be reduced when it is used at the user end. Currently, in order to reduce the gas pressure at the user end, a pressure reducing valve is usually provided on the gas delivery pipe. The existing pressure reducing valve has complicated structure and high manufacturing cost, and the pressure reducing valve has a large volume and cannot be installed in a narrow space. [0003] Existing decompression valves, such as a high-pressure natural gas decompression valve disclosed in Chinese Patent Application Publication No. "102052495A", natural gas flows in from the intake end, and enters from the top and bottom direction after passing through the decompression mechanism. When the gas outlet is connected to the cavity, the na...

AI Technical Summary

Problems solved by technology

The existing pressure reducing valve has complex structure, high manufacturing cost, and the pressure reducing valve is too large to be installed in a narrow space

[0003] Existing decompression valves, such as a high-pressure natural gas decompression valve disclosed in Chinese Patent Application Publication No. "102052495A", natural gas flows in from the intake end, and enters from the top and bottom direction after passing through the decompression mechanism. When the gas outlet is connected to the cavity, the natural gas will be sprayed onto the cavity wall at this time, causing the natural gas flow entering the gas outlet to be turbulent, which can easily cause flow fluctuations and cause the flame state to be unstable when the user uses it.

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