System Overview
Flow quantitative control system is a process of automatically cutting off or controlling the pipeline when the cumulative amount reaches a certain value based on the pipeline flow or filling for **metering.
Flow flow quantitative control system with all kinds of flow sensors, transmitters, to achieve quantitative filling, dosing control. The main technical characteristics are applicable to current, pulse output flow sensor 3-point switching input for start-up, recovery, and each time the accumulated value of zero 3-point control output for large and small valves graded control and instantaneous flow lower limit alarm variable output can be the instantaneous flow value in the form of standard current, voltage output for other equipment.
Flow quantitative control system is mainly based on the flowmeter feedback to the quantitative control instrument pulse flow signal, when the cumulative flow rate reaches the set value (quantitative value), the quantitative control instrument will give the solenoid valve door or pump a switch signal, has reached the valve, pump start and close control, so as to achieve automatic and manual control of the filling.
With the rising wages of workers, automatic control has become the trend. At present, many enterprises will use or are one of the items that need to be improved. It has the characteristics of easy to operate and learn, directly replacing manual beating and manual dosage, while this system shows intuitive, manual control or automatic control combined, etc.
At present, many enterprises will use or need to improve one of the projects, it has the characteristics of easy to learn operation, intuitive display, manual control of flow or automatic control of flow combination, etc. It is especially suitable for oilfield blending, water blending, drug blending, batching, quantitative water injection and quantitative control of various liquids. At present, some enterprises which still use manual operation for tank filling/batching, and at the same time don't want to invest too much cost, just want to improve the working efficiency, are recommended to adopt this system.
System components
1, flowmeter: this is the basis of control, directly affect the effect of control, so the basic requirement is the higher the accuracy of measurement, the better, with signal output function. At the same time, there are more types of flowmeter, but also according to the measurement medium, pipe diameter, flow range, explosion-proof, anti-corrosion, protection level and other parameters and requirements for selection, choose the right flowmeter.
2, quantitative control box: containing BRCN intelligent quantitative control instrument, internal control internal control lines and components, external control buttons and indicators, etc., the standard size of the box 400 * 300 * 200mm (height * width * thickness), power supply DC24V or AC220V optional, the sensor or break the flow of equipment have control box internal direct power supply. And can output 4-20mA, RS485 and other signals to other control equipment, but also can be added to print function.
3, break the flow of equipment: can be pumps and other power equipment, can also be such as solenoid valves, electric valves, pneumatic valves and other equipment, as long as the corresponding power told during the selection, we make customized, but also we can provide equipment.
Control process
After receiving the flow signal from the flow meter, the quantitative control instrument will complete the accumulation of flow inside the instrument, and set the required quantitative control value inside the instrument. At this time, the switch signal is used to control the flow breaking equipment installed on the pipeline through the mating relay or contactor, so as to achieve the effect of quantitative control.
Product features
1、Only flow meter, control box and flow breaking equipment are needed, simple structure and low cost.
2, the control box control lines and components are customized according to the customer's needs flowmeter and equipment, signal line connection is simple, to the site generally do not need to adjust, flowmeter and disconnecting equipment, etc. are control box to provide power, only need to provide AC220V to the control box can be;.
3, the control box panel with "start", "stop" and "zero" button, and "status indicator" display, so the display is intuitive, simple, convenient and easy to learn to operate.
4、The dosing controller is a full Chinese liquid crystal display, each time the dosing control value can be changed according to the need, only in the dosing controller to complete the operation.
Main functions
1、With large and small valve control, to control large flow and small flow respectively, to achieve ** quantitative control.
2、When controlling pump and valve at the same time, with pump delay start and pump advance valve closing function.
3, equipped with overflow, hold pump interface, overflow, hold pump when the occurrence of shutting down the fight material instant protection.
4、The total accumulation, instantaneous flow, time, flowmeter input signal value, etc. can be viewed in the quantitative controller, and there is a query function for the number of times of beating, each beating time, each beating volume, daily or monthly accumulation, etc.
5、It can be equipped with a printer for real-time printing function, printing function includes the starting and ending time of beating, beating volume, actual beating volume, beating name (set freely according to customer requirements).
6、Power-off keep function: If there is a power-off in the process of beating material, the quantitative controller will automatically keep the working data and status before the power-off.
7、The controller and the control box are completely developed independently, so we can make custom-made if other functions are needed.
Order instructions
1、Select the appropriate flowmeter: tell us the name of the measurement medium, measuring tube diameter, working pressure and temperature, flow range or other requirements, we give you the selection.
2、Explain the requirements of control: such as the size of each quantitative value, the number of times per day control, whether the value of each control is the same as well as other requirements.
3、Select the disconnection equipment: If there is already disconnection equipment, please tell us its working power and power, we make tailor-made; if you need us to provide disconnection equipment can also be. Here we recommend that the break-off device please choose solenoid valve or electric valve (in need of delayed start or shutdown) is better, try not to control the pump, such as to control the pump should be in the field to the pump's power supply plus contactor, we control the power of the contactor. At the same time in the pipeline arrangement, to the level difference to produce the flow of power source for, so that the control is safer, measurement accuracy is also accurate.
Solution display
Simultaneously control the start and stop of the valve and pump to achieve the role of flow control
Specific operation: press the instrument start button, the pump and solenoid valve open at the same time, the liquid flows through the flow meter, the flow meter will flow signal to the quantitative control instrument, to reach the set value, the quantitative flow control instrument to cut off the AC contactor power, solenoid valve power, the pump, solenoid valve off, a quantitative control operation is complete.
