Multi-bin weighing system adopts PLC ladder diagram programming to realize various logic sequence control and flow rate detection control. The control system can realize automatic/manual switching and frequency conversion/industrial frequency switching (if it is necessary to inject the reaction tank quickly, the industrial frequency operation mode can be used). When using the frequency conversion start-up mode, the frequency converter frequency rises to 25Hz in the first 3s, and then drops to the lowest frequency after 2s. This start-up process allows the air in the transfer pipe to be exhausted, and the starting flow rate is extremely small. Then the frequency converter is slowly accelerated from the lowest frequency to ensure that the flow rate is increased linearly, so that the injection volume increases with time in square proportion to meet the process requirements.

The automatic mixer communicates with PLC through serial port. According to the actual process of dosage process in the form of dynamic screen to reflect the feeding, dosage, feeding and related equipment operating status, operation when there is an overrun fault, alarm prompts, and start the alarm (sound, light) alarm, or shutdown, or change the warehouse, according to the operating data to make the state of the control analysis, with a different color bar graph to reflect the system's dynamic dosage process. According to the operation data, it can give the ratio or feeding quantity, and truly reflect the dosage status. Batching also has other functions, such as shift report, daily report, monthly report, annual report and other functions. It provides convenient management.

Weighing and mixing machine contains weighing instrument, weighing module, frequency converter and field control box. And leave the communication interface with the upper computer. The material is conveyed into the mixer. The weight signal is sent to the weighing instrument. Weighing instrument will load the weight signal through the operation and processing of the material weight, respectively, in the weighing instrument display. Weighing instrument and frequency converter control the screw conveyor speed to form a closed loop control. The built-in intelligent software regulator of the weighing instrument can set high, medium and low feeding to ensure the accuracy of dosage. The output of three sets of signals is used to control the frequency converter, which in turn controls the feeding speed of the screw feeder, thus achieving the purpose of accurate dosage. The weighing meter can set the feeding quantity manually or set the proportion through the two-way communication between computer and meter.

Weighing mixer consists of two parts: hardware and software. Hardware part is mainly composed of mixing tank body, mixing tank cover, agitator, load-bearing weighing module, weighing instrument, transmission device, shaft sealing device and other programmable controllers, the upper industrial control computer system, etc.; according to the actual situation of the process, the two raw materials in the two raw materials before the delivery of the computer matching, according to the operator set the ratio of the two raw materials (i.e., the percentage) on the touch screen, the computer will automatically calculate the operating According to the proportion (i.e. percentage) of the two kinds of raw materials set by the operator on the touch screen, the computer will automatically calculate the running speed, and then according to the weight signals sensed by the two kinds of electronic scales, the computer will analyze the calculation at any time and control the adjusting speed so as to achieve the set proportion.

The design of the weighing and mixing machine is centered on the computer, and the operation process is also centered on the computer, and the process of feeding, temperature control, and discharging are all carried out by the sequential instructions issued by the computer. Each step of the operation process is carried out through the computer prompts and manual confirmation, the operation of the site with the computer system to carry out. Except for the operations that require manual cooperation, all other processes are automatically controlled by the computer system. The discharge rate of the weighing system affects the temperature of the mixing kettle and is controlled by detecting and regulating the flow rate. The control program automatically changes the feed flow rate according to the internal temperature rise rate to ensure that the internal temperature does not exceed the required range. At the same time, the jacket flow can be adjusted to stabilize the temperature in the dosing kettle.

The weighing mixer adopts automatic control to realize the automatic control and supervision of raw material feeding, weighing and metering, vacuum feeding, dispersion and mixing, etc. The dispersion time and cylinder number can be selected and adjusted on the computer according to the production requirements, and the opening and closing of the motor equipment and the opening and closing of the feed valve in the process are controlled by the computer. Automatic filling line is adopted for filtration and packaging of finished products, and the palletizing process is robot palletizing.

Weighing and mixing machine is a complete set of automation equipment for dynamic weighing and batching control through electrical control management and visualization man-machine software configuration. It adopts Siemens PLC, programmed and controlled according to the production requirements; the software adopts man-machine configuration, according to the process requirements, through the monitoring system and PLC program to control the weight and flow of the materials loaded into the weighing hopper, so as to realize the accurate measurement and dosage. The system has strong stability and high cost performance, and can provide accurate measurement data and control means for production control and management of various industrial sites.

Weighing mixer for additives and pre-mixing unit, PLC as the main control of the unit, weighing module to collect the weight of the material in the mixer and should have the position (prompted when the material is lost). Limit switch, when the lifting action reaches the position, it should be signaled at the appropriate position. Analog output signal, 4-20mA to 4 valve switches to control the opening, with S type tension to collect the material position and close the valve when the weight reaches the required dosage weight. Has a communication circuit module whose function is to communicate with the console. The communication data is bi-directional and is required to receive information from the console about the specific gravity of the material and the weight distribution of each material mixer.

Weighing mixer from the silo into the electric arc valve, and then sent by the screw feeder into the electronic scale to measure the size of the flow, and according to the actual need for electronic scales to adjust the speed of the screw feeder, so as to achieve normal feeding. Through the measurement of the electronic scale into the spiral pneumatic conveying pump feed box, and through the feeding mechanism forward, into the mixing bin and by the fan outlet air gasification, and sent to the conveying pipeline.