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Pressure monitoring method for liquid level of vehicle-mounted liquefied natural gas tank

An LNG tank and LNG technology, which are applied in the container discharge method, container filling method, gas/liquid distribution and storage, etc., can solve problems such as maintenance difficulties and vehicle-mounted LNG tank liquid level monitoring, etc., to facilitate fault maintenance. Effect

Active Publication Date: 2015-09-09
江苏省特种设备安全监督检验研究院张家港分院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a pressure monitoring method for the liquid level of a vehicle-mounted LNG tank, which solves the problem of difficult monitoring and maintenance of the vehicle-mounted LNG tank

Method used

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  • Pressure monitoring method for liquid level of vehicle-mounted liquefied natural gas tank

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the examples, but it is not intended to limit the present invention.

[0014] please combine figure 1 First, install a set of elastic supports 2 on the lower vehicle floor 3 of the vehicle-mounted LNG tank 1, make four elastic supports 2 according to the volume of the vehicle-mounted LNG tank 1, and install the vehicle-mounted LNG tank 1 on the elastic support 2. on support 2. Install the four elastic supports 2 on the base of the bracket 4 of the LNG tank 1, and adjust the position of the bracket 4 so that the center of gravity of the vehicle-mounted LNG tank 1 and the rigid center of the elastic support 2 coincide. The LNG tank 1 and the elastic support 2 will form a rigid vibration system with four degrees of freedom. A pressure sensor is installed on the elastic support, and the pressure sensor is used to collect and embed the upper half of the elastic support and keep it in contact with the...

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Abstract

The invention discloses a pressure monitoring method for a liquid level of a vehicle-mounted liquefied natural gas tank. The method is characterized in that the liquefied natural gas tank is connected with an automobile bottom plate through an elastic support, and the gravity center of the liquefied natural gas tank coincides with the rigidity center of the elastic support; a pressure sensor collects a pressure signal of the elastic support, the proper time duration is selected, time average is carried out on collected total pressure, and a pressure average value is close to mass of a system; and a processor compares the mass with the mass of the system in the no-load process of the liquefied natural gas tank so as to obtain the stock mass of liquefied natural gas, and a liquid level value is determined. According to the method, when a vehicle is static, the liquid level of the liquefied natural gas is monitored, and when the vehicle runs, the liquid level can be monitored in real time, and failure maintenance is facilitated.

Description

technical field [0001] The invention relates to a method for monitoring the liquid level of a liquefied natural gas tank, in particular to a pressure monitoring method for the liquid level of a vehicle-mounted liquefied natural gas tank. Background technique [0002] The liquefied natural gas tank is used to store liquefied natural gas, and the current monitoring device for the liquid level of the liquefied natural gas is a capacitor pre-buried type. The capacitive sensor is pre-installed in the vacuum-sealed LNG tank. The level of the LNG liquid level causes the sensor to generate different capacitances. The current capacitance is calculated in real time according to the initial capacitance at no-load and the capacitance at full load. LNG level. Since the capacitive sensor needs to be pre-installed inside the tank, it is easy to cause damage to the capacitive sensor during the process of sealing and vacuuming the LNG tank. After a period of use, the capacitive sensor itse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C13/02
Inventor 何华孙建明陈启东郑万泔陈嫄嫄
Owner 江苏省特种设备安全监督检验研究院张家港分院
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