Variable-frequency oil gas recovery control system of fuel dispenser

Abstract

The invention is provides a variable-frequency oil gas recovery control system of a fuel dispenser. The system comprises a flow metering impulse sensor, a controller, a recovery motor, a recovery oil pump and a temperature sensor arranged on an oil filling pipeline; the flow metering impulse sensor is in signal connection with a flowmeter arranged on the oil filling pipeline, and the flow metering impulse sensor is sequentially in the signal connection with the controller, the recovery motor and the recovery oil pump; and the temperature sensor is further in the signal connection with the controller so as to control the recovery motor and the recovery oil pump through a temperature signal. According to the variable-frequency oil gas recovery control system of the fuel dispenser, disclosed by the invention, a frequency converter is directly controlled by the temperature signal and a flow signal, so that the speed regulation of the variable frequency motor is controlled, the self-adapting oil gas recovery is realized, and the adjustment and the control are relatively exact, and therefore, the oil gas recovery ratio is within a range from 1-1.4, furthermore, the variable-frequency oil gas recovery control system disclosed by the invention does not adopt an oil gas recovery control system of a proportioning valve, so that the flow of gas can be greatly improved.

Description

technical field [0001] The invention relates to a fuel dispenser, more specifically, to a frequency conversion oil vapor recovery control system for a fuel dispenser. Background technique [0002] Fuel dispenser is a fuel sales terminal equipment. Ordinary fuel tanker hydraulic control system is generally composed of motor, displacement pump, oil-gas separator, flow measurement converter, encoder, counter, indicating device, solenoid valve, oil sight, oil gun, control board and other main components. Complete liquid transport and measurement system. [0003] Gas station oil and gas recovery technology, currently there are primary, secondary, and tertiary recovery. One-time recovery refers to the recovery of oil and gas discharged from the oil depot at the same time when the tanker unloads the oil to the oil depot of the gas station. Secondary recovery refers to the recovery of the oil and gas discharged from the fuel tank at the same time when the fuel tank is refueled wi...

AI Technical Summary

Problems solved by technology

[0009] The first three recovery systems have the following disadvantages: Since the saturated vapor pressure of gasoline and other gasification media increases significantly with the increase of temperature, gasoline and other gasification media are more likely to volatilize at high temperatures

Therefore, it is unreasonable for the first two recovery systems to maintain a fixed 1:1 gas-liquid ratio.

On the contrary, if the gas-liquid ratio is too large, it will cause oil and gas loss in the oil tank, and the recovery ratio is too large, which also wastes electric energy

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