Liquefied natural gas fuel system capable of immediately detecting vacuum degree and detection method thereof

Abstract

The invention discloses a liquefied natural gas fuel system capable of immediately detecting a vacuum degree and a detection method thereof. The liquefied natural gas fuel system capable of immediately detecting the vacuum degree comprises a gas cylinder, a fixing frame, a fluid-filled pipeline, a gas return pipeline, a liquid outlet pipeline, a supercharging system and the like. The liquefied natural gas fuel system capable of immediately detecting the vacuum degree and the detection method thereof have the beneficial effects that an ionization gauge is arranged at the back of a liquefied natural gas vehicle-mounted gas cylinder shell; the vacuum degree data of a heat insulating layer can be directly read out by the ionization gauge at all times and places; the numerical value of the leakage and degassing rate of an interlayer can be figured out according to the data, thereby judging whether the liquefied natural gas vehicle-mounted fuel system conforms to quality standards, and preventing releasing of plenty of liquefied natural gas caused by frequent jumping up of a safety valve resulting from the poor heat preservation effect of the liquefied natural gas vehicle-mounted fuel system from causing explosion accidents.

Description

technical field [0001] The invention relates to a liquefied natural gas fuel system, in particular to a liquefied natural gas fuel system capable of detecting the vacuum degree in real time and a detection method thereof. Background technique [0002] With the rapid development of my country's economy, the appearance of cities has undergone tremendous changes, but the urban environment is also threatened by pollution, coupled with rising oil prices, it also prompts us to find more environmentally friendly and economical clean energy as a substitute. [0003] Since the specific gravity of natural gas is lighter than that of air, the leaked natural gas is easy to diffuse in the air without gathering, and the safety performance of using natural gas fuel is good. Therefore, it is one of the most realistic choices to use natural gas instead of petroleum products as vehicle fuel. Natural gas vehicles, compared with traditional gasoline vehicles, have greatly reduced carbon monoxid...

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Problems solved by technology

[0006] The main purpose of the present invention is to disclose a kind of liquefied natural gas fuel system, this kind of liquefied natural gas fuel system can detect the vacuum degree of the insulation layer between the gas cylinder liner and the shell and the rate of gas leakage and deflation at any time, so as to overcome the inability of the existing liquefied natural gas fuel system to Insufficient real-time detection of insulation layer vacuum degree and interlayer gas leakage rate

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