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The system uses the motor speed regulating device as the main control, optimize the control of the pump valve speed regulating operation, complete the oil supply pressure constant closed-loop control; To stabilize pressure and save electric energy when pipeline flow changes; At the same time to reduce the impact of pump and pipeline equipment to achieve smooth operation. Through the real-time detection of pipeline pressure, the system compares the given pressure of the pipeline with the actual pressure of the feedback main pipe, and issues control instructions after calculation to control the actual speed of the variable pump, so as to maintain the main pipe pressure above the set pressure.
The device is mainly composed of PLC controller, touch screen display, transmitter, object level controller and other electronic control equipment and corresponding pump and valve. Each independent subsystem is equipped with a corresponding backup device to shorten the downtime due to failure. Installed on the system total outlet pipe water pressure transmitter detection, supply and install material level switch back to the pool, through the controller input detection module will transmitter output after the actual operations of the demand value of the signal and system, adjust the output frequency of frequency converter to change the actual speed of variable pump motor, to maintain a constant oil pressure; Check the oil level signal of supply and return tank and compare it with the set high and low limit oil level.
