The control objects of the Weighing quantitative Filling machine include rotary Feeders, ball valves, butterfly valves, directional control valves, pulse valves, control valves and material level switches, etc. It is composed of a central PLC control system control unit, power supply, 1/0, communication module, operation station and network components, etc. The PLC control system is used to receive, transmit and display signals from the filling site, record, store, display and control the operating status of the site. The signal collection, instruction sending and equipment status display of the main equipment in the conveying system are accomplished through switch buttons, indicator lights and relays. The Weighing system screen simulates the conveying process flow and reflects the working conditions of the on-site conveying equipment in real time through animation simulation. It quantitatively sets the pressure parameters and time parameters of the conveying system and statistically analyzes the cumulative volume of the conveyor, assisting the operators of the conveying system to have a comprehensive understanding of the dynamic conveying system. The weighing system can reliably monitor the entire system.

The automatic filling machine mainly consists of three parts of equipment: discharging, conveying and metering. The discharging equipment usually includes bar valves, arc valves, jaw valves, weighing feeders, weighing systems, etc. The conveying equipment is a weighing belt conveyor, and the metering system is an electronic floor scale. When the transport truck enters the sub-loading position, the driver initiates the automatic sub-loading system by swiping a card or scanning a code. The liDAR scans the length, width and height data of the cargo compartment, calculates the pre-loading volume of the cargo compartment, and simultaneously locates the coordinates of the rear panel of the cargo compartment. Based on the above data, the belt conveyor moves to the starting point for portioning. According to the actual situation, the head or tail of the carriage can be selected as the starting point for portioning. The PLC program calculates the traveling speed of the belt conveyor by combining the conveying capacity of the weighing belt conveyor, the pre-loaded capacity of the carriage, and the length of the carriage. The hook speed weighing belt conveyor is used for quantitative packaging. The weighbridge provides real-time feedback on the portioning volume. Once the carriage is fully loaded, the belt conveyor and the unloading equipment will shut down in sequence.

The weighing and packaging machine is driven by a motor, so the final control is the start and stop control of the motor. Moreover, during the material conveying process, to prevent all the conveyor belt motors from starting simultaneously, which could cause a sudden increase in load, and to prevent material blockage, the conveyor belt motors of the subsequent stage are usually started first. After a certain period of delay, the conveyor belt motors of the previous stage are started. When stopping the conveying, first stop the motor of the previous stage conveyor belt, and then stop the motor of the subsequent stage conveyor belt after a delay, so that the materials on the conveyor belt can be conveyed completely. It can be seen from this that the operation and stop of each motor are related to time, that is, the control of the motor should be sequential control of switch quantity time. This control can be achieved by using PLC, with sequential logic functions accomplished by software and operation instructions executed and operations carried out by a computer.

The weighing and packaging machine adopts a fully enclosed belt conveying system to complete the transfer of materials. The materials are fed through the automatic Feeding machine and then sucked into the crusher by the weighing feeding machine. The materials are then transported over long distances to each workshop by the weighing conveying method and connected to their respective automatic Batching systems. The entire process is fully enclosed and uses a main pipeline to convey materials, forming a single-pipe multi-point conveying system. It is also possible that each feeding machine uses a shared device to supply materials to two filling machines respectively. Achieve pollution-free transportation throughout the entire process from powder crushing to powder delivery to each floor, each workshop and each material storage bin, eliminating all pollution to the powder. By adopting programmable control technology, the automation of feeding, portioning and other processes is achieved, thereby enhancing the precision of the powder.

The high material level of the aggregate silo is equipped with a weighing module. If the material in the silo is detected to be full, the system will temporarily shut down and notify the workers to discharge the material. The discharge from the silo adopts a rotary valve form, which enables the discharge work to be carried out simultaneously during crushing, thereby enhancing the system's working efficiency. The unified control adopts PLC intelligent control, which automatically detects and executes through the weighing module, avoiding human intervention that may affect the system operation.