Hydraulic refueling substation for gas-fueled vehicles and oil-returning and gas-releasing system thereof

Abstract

The invention discloses a hydraulic refueling substation for gas-fueled vehicles and an oil-returning and gas-releasing system thereof. The oil-returning and gas-releasing system comprises a substation vehicle for transporting and storing compressed natural gas, a hydraulic substation for providing high-pressure liquid, and a gas-releasing device connected with the substation vehicle through an unloading hose and connected with the hydraulic substation through a steel pipe, wherein the gas-releasing device controls the unloading of the compressed natural gas in the substation vehicle in virtueof the high-pressure liquid provided by the hydraulic substation and controls the returning of the high-pressure liquid from the substation vehicle to the hydraulic substation after completion of theunloading, and the deaerator is independent of the substation vehicle and the hydraulic substation and located between the substation vehicle and the hydraulic substation. The hydraulic refueling substation for gas-fueled vehicles comprises the above oil-returning and gas-releasing system. The hydraulic refueling substation for gas-fueled vehicles and the oil-returning and gas-releasing system thereof in the invention reduce residual pressure in the unloading hose and lower gas loss.

Description

technical field [0001] The invention relates to the field of natural gas filling, in particular to a hydraulic natural gas vehicle filling sub-station and an oil return and unloading system thereof. Background technique [0002] Generally, hydraulic natural gas vehicle refueling sub-stations include hydraulic sub-stations for supplying special liquids (hydraulic oil), trailers (also known as sub-station vehicles) for transporting and storing compressed natural gas, and gas refueling stations for refueling vehicles. machine. The sub-station car and the hydraulic sub-station are connected by unloading hoses. Wherein, an unloading device is installed in the hydraulic substation, and the unloading device is provided with a control module and an unloading component for unloading the compressed gas in the substation. [0003] The process of filling the vehicle with hydraulic natural gas vehicle filling sub-station is as follows: Fill the hydraulic oil of the hydraulic sub-statio...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of high residual pressure and large gas loss caused by the excessively long unloading hose in the filling substation of hydraulic natural gas vehicles in the prior art and the large amount of hydraulic oil in the unloading hose during oil return, the present invention provides a Oil return and unloading system of a hydraulic natural gas vehicle refueling substation

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