The weighing silo machine uses a weighing module for force-electric conversion to convert the force into an electrical signal. The signal is amplified and processed by the weighing instrument and then connected to the PLC to complete the measurement and control, in coordination with the PLC. The composition of the automatic control for weighing and feeding mainly includes ratio, temperature, time, and pre-treatment of the materials. The PLC is used to implement various logical sequence control and flow rate detection control. This control system can achieve automatic/manual switching and frequency conversion/frequency control. According to the respective formula ratios, the materials are added to a large silo, and the conveyor transports the materials to the silo. Each silo is equipped with a screw Feeder driven by a servo motor, which conveys the materials into the silo. The bottom of the weighing silo is equipped with a weighing module, and after the entire process is completed, the valve at the bottom of the silo can be opened, and the materials will be conveyed by gravity to the mixer.

The weighing silo machine is a measuring device that calculates the instantaneous flow rate of the silo based on the rate of weight reduction detected by the silo. The Measurement system consists of a buffer silo, buffer silo butterfly valve, silo scale, weighing module, speed regulating screw motor, etc. After the PLC system issues a "start" command to the weighing instrument, the weighing instrument sends a control signal to control the frequency converter to start running, and the speed regulating screw motor starts rotating, driving the gradual outflow in the silo scale. At this time, the weighing module continuously inputs the weighing signal into the weighing instrument, calculates the current flow rate, and displays it on the weighing instrument. At the same time, it is compared with the set value. If they are not consistent, the weighing instrument will send a control signal to the frequency converter to adjust the motor speed by regulating the operating frequency of the screw motor, thereby achieving the purpose of controlling the flow rate. Until it is consistent with the set value and runs stably. As the gradual outflow continues, when the weight in the silo scale is below the lower limit, the weighing instrument will issue a control instruction to add, at this time, the buffer silo butterfly valve will open, and the materials in the buffer silo will flow into the silo scale. When the weight in the silo scale is above the upper limit, the butterfly valve will close, and the adding process will end. The flow regulation and feeding process repeat, forming the cycle process of the reduction weighing work.

The weighing silo machine controls the rotational speed of the screw conveyor based on the rate of weight reduction in the silo Electronic scale to achieve quantitative feeding. When the materials in the silo electronic scale reach the upper limit of the weighing, the screw conveyor will discharge materials at the current speed, and at the same time, control the materials to fall rapidly into the silo electronic scale. When the filling reaches the upper limit of the scale, filling stops. By controlling the fixed value of the material volume in each stage, automatic batch control and the collection and transmission of a series of signals are achieved, thereby achieving precise control of the feeding. The weighing silo machine is used in combination with the silo electronic scale in the feeding system, and the weight reduction situation of the materials in the silo scale is detected by the weighing module, and the weighing instrument continuously calculates the difference between the set value and the actual feeding volume and adjusts the actual feeding volume by regulating the speed of the screw feeder. When the material weight in the silo electronic scale drops below the filling upper limit, the filling process will start again. At this time, the speed control of the screw feeder will be locked until it reaches the filling upper limit. When the filling effect is stable, the screw feeder will start to adjust the speed again. The weighing feeder conveys the materials out by screw, so that the materials are added more evenly to the mixer.