Return oil detection method of hydraulic type natural gas vehicle gas-filling substation

Abstract

The invention relates to a return oil detection method of a hydraulic type natural gas vehicle gas-filling substation and belongs to the technical field of return oil detection technology of the gas-filling substation, and the hydraulic type natural gas vehicle gas-filling substation comprises a high pressure flowmeter, a substation trailer, a hydraulic oil tank, a substation prying body, a main hydraulic oil pump, a hydraulic oil pump motor, a PLC control cabinet, a variable frequency control cabinet and a wind source device; the average flow of hydraulic oil and the average flow of natural gas in a pipeline are obtained by experiments, then output signals of the high pressure flowmeter are sent to a CPU of a PLC for processing, and whether the substance that flows through an oil return pipeline is the hydraulic oil or the natural gas is judged by the PLC by detecting the size of an instant flow signal that flows through the high pressure flowmeter when the hydraulic type natural gas vehicle gas-filling substation returns oil. The method has the advantages of judging the medium type in the oil return pipeline according to an instant flow value of the high pressure flowmeter on the oil return pipeline of the hydraulic type natural gas vehicle gas-filling substation and solving the problems of false operations and low security.

Description

technical field [0001] The invention belongs to the technical field of oil return detection of gas refueling sub-stations, and in particular provides a method for detecting oil return of hydraulic natural gas vehicle refueling sub-stations. to determine the type of medium in the oil return pipeline. Background technique [0002] Natural gas is a colorless, odorless, non-toxic, high-calorific value, stable combustion, clean and environmentally friendly high-quality energy. Compressed natural gas (CNG), as an alternative fuel for urban buses, taxis, and short-distance transportation, has many advantages such as low price and no pollution, and has been used more and more in the country. Set up a mother station at the source of natural gas, compress the natural gas to 20MPa, and then transfer it to the sub-station in the city by the trailer of the sub-station. The hydraulic sub-station for natural gas vehicles continuously replenishes the pressure through the main hydraulic oi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulic natural gas vehicle refueling sub-station oil return detection method, which solves the problems of misoperation and low safety

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