LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder system capable of automatically supercharging

Abstract

The invention provides an LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder system capable of automatically supercharging. An LNG vehicle-mounted gas cylinder is provided with a gas supply system and a saving loop, wherein the LNG vehicle-mounted gas cylinder is provided with a main safety valve, an auxiliary safety valve, a first pressure meter and a liquid level measuring system. The technical points of the vehicle-mounted gas cylinder system are as follows: the LNG vehicle-mounted gas cylinder system is also provided with an automatic supercharging system, a liquid absorbing pump is connected between an outlet of the LNG vehicle-mounted gas cylinder and an inlet of a water-bath vaporizer of the gas supply system, and the outlet of the water-bath vaporizer is extended into the LNG vehicle-mounted gas cylinder; the liquid absorbing pump is powered by a vehicle-mounted power source, and the control circuit of the liquid absorbing pump is connected with a pressure sensor and a transmitter automatic control switch; when the working pressure of the gas cylinder is less than the set pressure value, the liquid absorbing pump is started, and the liquid is absorbed out; the liquid enters into the water-bath vaporizer and turns into a gas state, and the gas enters into a buffer tank, one part of the gas is used for engine operation, and the other part of the gas enters into the gas cylinder by virtue of a pipeline, so as to achieve a supercharging effect, conversely, when the working pressure of the gas cylinder is higher than the set pressure value, the liquid absorbing pump is turned off.

Description

technical field [0001] The invention belongs to an LNG vehicle-mounted gas cylinder pipeline system, in particular to an LNG vehicle-mounted gas cylinder system capable of automatic pressurization. Background technique [0002] The existing LNG vehicle-mounted gas cylinder, in order to ensure the gas saturation supply during the use of the vehicle, is equipped with a self-pressurization pipeline system on the LNG vehicle. This pipeline system can achieve gas pressure saturation in principle, but has the following question: [0003] 1. This self-pressurizing system must be controlled by a manual booster valve to achieve the boosting effect, and it needs to be stopped for boosting during driving; 2. The external pipeline system is led out separately, the route is long, and there are many interface valves , Once the exposed part is impacted or man-made, it will cause cryogenic liquid to spray out. The above two problems will cause serious security risks. 3. Affected by the h...

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Problems solved by technology

The above two problems will cause serious security risks

3. Affected by the height of the liquid level, when the liquid level is low, the pressurization is slow or cannot be increased

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