Gas station and power device and control method thereof

Abstract

The invention provides a gas station and a power device and a control method of the gas station. The power device comprises a liquid suction and drainage tank and an air pressure adjusting mechanism. A liquid inlet of the liquid suction and drainage tank is connected with a first liquid outlet of a liquid storage tank. A liquid outlet of the liquid suction and drainage tank is connected with a liquid charging machine. An air inlet of the liquid suction and drainage tank is connected with a high pressure air supply mechanism. An air outlet of the liquid suction and drainage tank is connected with a low pressure air exhaust mechanism. In the first state, the liquid outlet of the liquid suction and drainage tank is disconnected with the liquid charging machine, the air inlet of the liquid suction and drainage tank is disconnected with the high pressure air supply mechanism, the air outlet of the liquid suction and drainage tank is made communicated with the low pressure air exhaust mechanism, and the liquid inlet of the liquid suction and drainage tank is made communicated with the first liquid outlet of the liquid storage tank. In the second state, the liquid inlet of the liquid suction and drainage tank is disconnected with the first liquid outlet of the liquid storage tank, the air outlet of the liquid suction and drainage tank is disconnected with the low pressure air exhaust mechanism, the liquid outlet of the liquid suction and drainage tank is made communicated with the liquid charging machine, and the air inlet of the liquid suction and drainage tank is made communicated with the high pressure air supply mechanism. The power device can replace an immersed pump, the cost is reduced, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to a LNG (Liquefied Natural Gas, liquefied natural gas) gas filling technology, in particular to a gas filling station and its power device and control method. Background technique [0002] At present, natural gas has been widely used in many aspects of society and life. Among them, the use of natural gas as fuel to drive the operation of other equipment has become an important aspect of natural gas utilization. In order to facilitate transportation and loading, liquefied natural gas (LNG) through liquefaction of natural gas has become one of the important ways of utilizing natural gas. [0003] In order to expand the scope of use of LNG, LNG refueling stations are usually set up at predetermined locations to refuel long-distance heavy trucks, buses or other refueling equipment at predetermined locations. [0004] LNG filling stations generally mainly include liquid storage tanks, liquid filling pump skids with submersible pumps...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a gas filling station and its power device and control method, which can solve the problems of high manufacturing cost, high maintenance cost, etc. technical problem

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