The automatic Batching system for material tanks is a very important Electronic scale process in the production process of fine chemical enterprises, consisting of two subsystems: front and rear batching. Under the control of the central control microcomputer, the pre batching scale mixes solid materials such as powder with liquid materials in the reaction kettle to form a slurry. After aging and temporary storage, the weighing module slurry is pumped into the material bin by a high-pressure pump and dried by hot air to form a base powder. The front batching machine mainly completes the weighing and proportioning of main materials and various ingredients. The post batching machine passes the base powder formed by the front system through a spiral scale and a conveyor mixer. After the raw materials are mixed, they are sent to the finished product warehouse, achieving the measurement of the flow rate of the conveyed materials. The batching machine strictly mixes various raw materials in proportion to ensure product quality. The raw materials are uniformly mixed together in a certain proportion to form a new material. Using an industrial computer as the upper host and Siemens PLC, frequency converter, and weighing instrument as the lower slaves. Implement communication management and control for each slave, connect the RS-232 asynchronous communication port of the industrial computer to the PLC after level conversion, and form a physical channel for communication between the upper and lower computers. Connect the other RS-232 port of the host to the communication port of the weighing instrument to form a second physical channel. The upper computer adopts a polling method to communicate with the slave stations one by one. The upper computer transmits the results of task planning to the PLC. During the control process of the PLC, the upper computer uses the upper computer connection command to monitor the operating status and data area content of the lower computer, reads the internal status of the PLC and real-time data of the weighing instrument in real time, and displays them on the upper computer.

The automatic feeding system adopts DCS distributed control mode and uses Siemens S7-300 PLC to form the data acquisition and control system. It is designed modularly and economically practical. The human-machine interface monitoring software adopts the leading configuration software "Kingview" in the domestic industrial control field, which has the advantages of good openness, easy user maintenance, and secondary development. All process control data and equipment operating status of the system can be centrally managed, recorded in real-time, and printed and viewed at any time. The weighing hopper machine adopts a storage hopper, with a groove at the top of the storage hopper and two rotating shafts. There are L-shaped plates fixed on both sides with grooves, and there are rotating shafts and two arc-shaped rods inside. The opposite end of the two rotating shafts is fixed with a bevel gear, and the opposite end is fixed with a transmission wheel. The L-shaped plate is fixed with bearings, and the outer side of the two arc-shaped rods is fixed with a rotating rod. The other end of the two rotating rods passes through the groove and is connected to the bearing. The two transmission wheels are connected to the two transmission wheels through a conveyor belt; There are several mixing rods fixed on the side of the rotating shaft, with one end passing through the groove and fixed with a bevel gear that meshes with both bevel gears for transmission. The top of the storage hopper is fixed with two circular tubes through two connecting rods, and two straight rods are fixed on both circular tubes and connected to two rotating shafts respectively. The bottom of the top plate is fixed with a driving motor, and its output end is connected to one end of the rotating shaft. The output end of the driving motor drives the rotating shaft to rotate, so that the bevel gear meshes with the two bevel gears for transmission. The two transmission wheels rotate to drive the two rotating rods to rotate, and the arc-shaped rods are coordinated with several mixing rods on the rotating shaft for mixing. =The ingredient monitoring system consists of two computers as the human-machine interface of the entire system. One of them is the main station, which completes all system parameter settings, process monitoring, and data recording; The other one serves as a slave station, relying on the main station, to manage the data setting and process monitoring of the post batching system. The main station directly communicates with the Siemens S7-300 PLC Weighing system, the front batching scale automatic control weighing instrument, and the rear batching scale.