LNG filling station liquid accumulation pool device

Abstract

The invention relates to an LNG filling station liquid accumulation pool device. The LNG filling station liquid accumulation pool device aims at solving the problem that accumulated water in a process pipe ditch and a protective embankment of an LNG filling station is difficult to discharge in time. The device comprises a pipe ditch liquid accumulation pool, a protective embankment liquid accumulation pool, a pump set, a drainage pipeline, an additional pipeline, a control unit, a liquid level sensor and a temperature sensor, wherein the liquid level sensor and the temperature sensor are arranged in the pipe ditch liquid accumulation pool and the protective embankment liquid accumulation pool respectively. The pump set comprises a double-output-shaft explosion-proof motor, a first clutch, an immersed pump, a second clutch and a pipeline pump, the immersed pump is connected with a lower output shaft of the double-output-shaft motor through the first clutch, the pipeline pump is connected with an upper output shaft of the double-output-shaft motor through the second clutch, and the immersed pump is arranged at the bottom of the protective embankment liquid accumulation pool. The additional pipeline comprises a circulating pipe arranged between an outlet of the pipeline pump and the pipe ditch liquid accumulation pool, a water injection pipe arranged between an outlet of the immersed pump and an inlet of the pipeline pump, a pipeline pump interlocking electromagnetic valve set, an immersed pump interlocking electromagnetic valve set, a pressure sensor and a one-way valve at an inlet of a water inlet pipe of the pipeline pump.

Description

technical field [0001] The invention relates to a liquid accumulation pool device of an LNG filling station. Background technique [0002] The LNG refueling station is a flammable, explosive, and ultra-low temperature place. The operating temperature of the natural gas pipeline in the station reaches -162°C. Since the protective embankment in the station is designed to be open to the open air, and the process pipe trench is designed to be semi-closed, it will encounter rain, snow, surface and underground water seepage It will make it difficult to discharge the accumulated water in the protection embankment and the process pipe ditch in time, which will lead to the failure of the cold insulation of the pipeline and cause hidden dangers in operation safety. Therefore, the discharge of accumulated water in the process pipe ditch and protection embankment of LNG filling station has become an urgent technical problem to be solved in the LNG filling station industry. Contents of...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem in the prior art that it is difficult to discharge the accumulated water in the process pipe ditch and protection dike of the LNG filling station in the prior art, and to provide a liquid accumulation pool device for the LNG filling station

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