By using the upper computer monitoring system, the weighing mixer can complete the configuration, debugging, online correction of detection parameters and setting of control parameters, the weighing transmitter is used to detect the change of material level in the material batching tank, and the volume and weight of the amount of material in and out is obtained by using the cross-sectional area of the measuring tank.

The mixer is automatically or semi-automatically completing the proportioning, weighing, feeding and distributing of raw materials at each time until the required weighing/feeding times of each batch are completed. At this point, PLC has completed a series of operations and controls. Such as the following target value calculation, raw material target value calculation, parameter automatic correction, etc. The main screen of each raw material and its parameter setting window have relevant parameters displayed, which can be used as control reference by the operator.

The constant pressure mixer controls the metering equipment to weigh in turn until the specified n times of weighing are finished, and the CRT returns to the display state when it is 0 times. When weighing a certain time, if any equipment or control point of the feeder or feeding system stops weighing, PLC can keep the memory of the time and continue weighing according to the memory of the time. DCS+PLC+ local manual control mode is adopted. The feeding process is completed by PLC, and its temperature and pressure are monitored by DCS system.

The vacuum mixer runs Siemens WINCC monitoring software through the computer, communicates with the two communication ports of the programmable controller through their respective communication ports, and backs up each other. It can dynamically display the process flow of the entire production process, display the operation, failure and alarm status of each equipment, and display process parameters such as temperature, pressure, etc. And can set such as alarm value, timing parameters, weighing instrument parameters.

The weighing module, pressure transmitter, material level gauge, position switch on pneumatic valve, air pressure gauge, etc. in the automatic mixer are used to detect and monitor the working conditions. The three-way valve can be controlled by the touch screen to judge the warehouse selection. When the multi-warehouse pump transports a single warehouse, in order to prevent the material from flowing back, a partition valve should be installed above the warehouse.

The fully automatic mixer adopts an industrial computer with high protection level as the main control computer of the system, and a special filter screen is used in the computer ventilation and heat dissipation system, which can be cleaned or replaced regularly and can effectively remove the influence of dust in the air on the equipment. The weighing system is input into the computer system through the man-machine interface or computer network, and the computer control system automatically calculates the supply ratio of each raw material according to the detection data and the process formula, and then the PLC control system synthesizes the supply speed of each raw material supply system to accurately and continuously complete the raw material ratio according to the process sequence.

The weighing mixer achieves the requirement of batcher control precision and reduces the cost as much as possible through the dosage ratio of each raw material. According to the difference of each batch of materials and arbitrary change, optimize the calculation table input database using the development of visual man-machine interface, read the calculation data and display in the interface, visually create the database application program, make the application of the database more convenient and flexible, while supporting the application of network environment.

The weighing mixer installs a module at the bottom of the silo, and ensures the normal operation of the whole system through the precise control of the electrical program. The control objects in the pneumatic conveying of positive pressure pulse material and acid are the exhaust valve, feed valve, discharge valve, pulse gas knife valve and inlet valve in the silo. The control mode is controlled by Siemens programmable controller, and the solenoid valves and motors are controlled by the operation of Proface touch screen, contactors and intermediate relays, which is convenient for debugging and maintenance.

The automatic mixer is equipped with an activation hopper and gasification at the bottom of the storage bin. When discharging, the activation hopper vibrates continuously and the gasification purging ensures the smooth falling of materials, and the eccentric vibration module can be used to adjust the vibration amplitude to improve the efficiency and gasification purging frequency. When conveying materials, the conveying capacity and conveying efficiency can be changed by adjusting the air time and material time of the air knife valve, which is helpful to meet some links with high requirements for crushing rate. The pulse interval and pulse width can also be adjusted to avoid dust leakage in the storage bin during transportation.