Quantitative flow control system

Summary：

Quantitative control system is the use of flowmeter, which can implement a device can realize oil, oil and chemical liquid products automatic quantitative filling or quantitative measurement, the ratio of liquid level measuring device and controller composed of quantitative flow, and at the same time to realize the production and management of regional office computer network has wide practicability.

System characteristics

1. It only needs flowmeter, quantitative controller and cut-off equipment. The structure is simple, the cost is low, and the system control accuracy is 0.2%;

2, can be customized control box, box put quantitative control instrument, simple wiring, to the scene after the adjustment is not required, and equipment can control flow meter box provides power, only need to provide AC220V to the control box;

3, the control box panel is provided with "start" and "stop" and "reset" button, and a "status indicator" shows that the site, so the visual display, simple operation, convenient and easy to learn;

4, quantitative control instrument can choose digital display and Chinese LCD display, to meet the needs of the scene.

System composition:

1. Flowmeter:

According to the measurement medium, pipeline caliber, flow range, explosion-proof, anti-corrosion, protection level and other parameters and site requirements, select the appropriate flowmeter, the accuracy of the flowmeter is very important, it determines the overall control accuracy.

2 、 quantitative control instrument:

Quantitative control instrument is a kind of electromagnetic, orifice, vortex, turbine flow sensor signal. By signal processing, operation, display and realize fluid batch control instrument through the output contact and electromagnetic valve combination, and advance equipment through the bulk filling value, with the size of the valve working mode or to achieve accurate control, and pendulum valve linkage and hand / self support mode is convenient for users to achieve flexible configuration, single and batch filling control, instrument of unfair with prescription, accumulation, alarm and other rich features, but also can realize the button to lift the alarm, sensor disconnection alarm and other special features, and can output 4-20mA, RS485 communication, fully meet the needs of different users in different places the.

3 、 cut-off equipment:

Can be pumps and other power equipment, can also be such as solenoid valve, electric valve, pneumatic valve and other equipment

Schematic diagram of system structure

1 、 adopt LKY scale mass flow meter + cut-off equipment scheme

Quantitative system operation step

1, under normal conditions, the cut-off device is closed;

2, manual switch operation power supply terminal, terminal operation set value memory (the cumulative flow numerical value best is zero, such as the last memory is not zero, you must manually reset) remain closed at this time, drying equipment;

3, manually open the cut-off device (the best operation on the operating terminal), the operation terminal shows the cumulative flow value and set the flow value;

4, in the process of feeding water, even if the total flow value does not reach the set value of flow, requirements can be done manually close the interrupting device (though not always will do so, but the requirements can be done, even if the power supply is off the operating terminal);

5, when the accumulative flow value reaches the set flow value, the operation terminal outputs the switch signal and closes the cut-off device;

6, return to normal;

7, manually after the cumulative flow value cleared, manually open the cut-off device for the next cycle.