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Variable frequency hydraulic control system of fuel dispenser and quantitative refueling control method thereof

A technology of hydraulic control system and control method, applied in the direction of liquid distribution, conveying or transfer device, special distribution device, packaging, etc., can solve the problem of reducing motor and pump efficiency, vibration and noise connecting parts, hydraulic components and measuring instruments damage, etc. problems, to achieve the effect of improving the water hammer effect, simplifying the internal structure, and controlling the flow

Active Publication Date: 2010-11-17
TOKHEIM HENGSHAN TECH GUANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water hammer not only affects the performance stability and working reliability of the hydraulic system, but also causes vibration and noise, loose connections, etc., and even ruptures the pipeline, damages the hydraulic components and measuring instruments, and has consequences in the large-flow tanker system more serious
[0007] 2. Although the solenoid valve reduces the "overshoot" during refueling and improves the accuracy of refueling, it also increases the pressure drop of the pipeline, increases energy consumption, and reduces the efficiency of the motor and pump

Method used

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  • Variable frequency hydraulic control system of fuel dispenser and quantitative refueling control method thereof
  • Variable frequency hydraulic control system of fuel dispenser and quantitative refueling control method thereof
  • Variable frequency hydraulic control system of fuel dispenser and quantitative refueling control method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The structural block diagram of the frequency conversion hydraulic control system of the fuel tanker with a single-valve structure solenoid valve is as follows: figure 1As shown, including interconnected motor, frequency converter, positive displacement pump, oil and gas separator, flow measurement transducer, encoder, control board with counter, indicating device, solenoid valve, oil sight, oil gun, manual input device and The voltage control device, wherein the solenoid valve is a solenoid valve with a single valve structure. The controllable factors affecting the refueling accuracy of the frequency conversion hydraulic control system of the fuel tanker are analyzed by orthogonal test method:

[0025] Refueling accuracy, that is, the relative error of the refueling amount, that is, the relative error between the actual refueling amount and the nominal refueling amount. During the test, the method of quantitative refueling is adopted for the fuel dispenser, such as qu...

Embodiment 2

[0049] For example figure 1 The frequency conversion hydraulic control system of the fuel tanker shown is tested for fueling accuracy at different initial frequencies and different margin frequencies to verify the fueling accuracy of the fuel tanker after changing the solenoid valve with a double-valve structure to a solenoid valve with a single-valve structure Can it be kept within the range required by the state (that is, the fueling accuracy is between ±0.3%) and achieve better results. Among them, the initial frequency is the frequency of the motor at the beginning of refueling, and the remaining frequency is the frequency of the motor when the last 0.3L of oil is added.

[0050] After experimental testing, the following results are obtained, as shown in Tables 3, 4, and 5, which are the relative error of refueling (that is, refueling accuracy) of the variable frequency refueling machine at different initial frequencies and different margin frequencies. Among them, Table ...

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Abstract

The invention relates to a variable frequency hydraulic control system of a fuel dispenser, which comprises a motor, a frequency converter, a displacement pump, an oil-gas separator, a flow measuring converter, a coder, a control main board with a counter, an indicating device, a voltage control device, a solenoid valve, a sight feed oiler, an oil gun and a manual input device which are interconnected, wherein the solenoid valve is in a single valve structure. The invention also discloses a quantitative refueling control method of the variable frequency hydraulic control system of the fuel dispenser, which sets the initial frequency of the motor as 15-35 hertz. The variable frequency hydraulic control system of the invention adopts the solenoid valve with a single valve structure, greatlysimplifies the internal structure of the solenoid valve, reduces the cost of the solenoid valve and decreases the voltage drop of the solenoid valve. By the control method, the quantitative refuelingaccuracy of the fuel dispenser achieves the national standard and can realize higher accuracy.

Description

technical field [0001] The invention relates to a hydraulic control system of a fuel dispenser, in particular to a frequency conversion hydraulic control system of a fuel dispenser and its control method during quantitative refueling. Background technique [0002] The existing hydraulic control system of ordinary fuel oil dispenser is generally composed of motor, positive displacement pump, oil-gas separator, flow measurement converter, encoder, counter, indicating device, solenoid valve, oil sight device, oil gun, control board and other main components. Composed of a complete liquid transport and measurement system. When the fuel dispenser is working, the positive displacement pump transports the oil from low to high, from low pressure to high pressure, along the pipeline to the flow measurement transducer to measure the volume of oil, and finally delivers it to the user from the oil gun. The difference between the fuel dispenser and the general hydraulic conveying system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B67D7/08
Inventor 刘亚俊黄佳彬蒋征学
Owner TOKHEIM HENGSHAN TECH GUANGZHOU
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