The weighing hopper system measures through the weighing module, and compares the measured value with a given value (the given value is determined by the ratio of material A and material B) and the measured value, and then transmits the result of the comparison to the PLC's A/D analog module, and then transmits the control signal (4-20mA current signal) through the PLC's D/A analog module to the electric regulating valve, and then controls the servo motor in the electric regulating valve to open the electric regulating valve to control the size of material B inlet. The control signal will control the servo motor in the electric control valve to adjust the opening degree of the electric control valve, so as to achieve the control of the feeding size of material B.
020-34563445The electrical part of the Feeder is mainly composed of Weighing modules, weighing instruments, programmable logic controller (PLC), frequency converter, industrial computer and printer. During the dynamic weighing process, the weight signal from the weighing module on the quantitative weighing hopper is accepted. When the weight of the material in the hopper reaches the set value, it outputs I/O quantitative signal to PLC, which collects the quantitative output signal from the weighing instrument and controls the output frequency of each frequency converter through PLC, so as to control the amount of coarse and fine feeding of the corresponding vibrating feeder and the opening and closing of the material door of each weighing hopper. The industrial computer communicates with the weighing instrument through RS232 interface and displays the weighing data of each scale on the monitoring screen, and the user can adjust the formula on the panel of the weighing instrument or on the operation interface of the industrial computer.
The feeding system measures through the weighing module, and compares the measured value with a given value (the given value is determined by the ratio of material A and material B) of the flow rate, and transmits the result of the comparison to the A/D analog module of the PLC, and then transmits the control signals (4-20mA current signals) through the PLC's D/A analog module to the motorized regulating valves, and controls the servo motors in the motorized regulating valves through the control signals. Through the control signal to control the servo motor in the electric control valve to adjust the opening degree of the electric control valve, so as to achieve the control of the amount of material B into the size.
Weighing and Batching system is a complete set of automation equipment to realize dynamic weighing and batching control through electrical control management and visualization man-machine software configuration. The electrical control part of the system adopts Siemens PLC, which is programmed according to the production requirements; the software adopts man-machine group configuration, according to the process requirements, through the monitoring system and PLC program to control the weight and flow rate of the materials loaded into the weighing hopper, so as to realize accurate measurement and dosage. With strong stability and high cost performance, the Weighing system can provide accurate measurement data and control means for production control and management of various industrial sites.
