After receiving the batching start signal, the dual-speed belt scale system first starts the bottom belt of the scale and the elevator, and then starts in a certain time sequence. The raw material scales begin to weigh materials, achieving remote - control room - on-site synchronous monitoring. It has three control modes: automatic, semi-automatic and manual. It has achieved the authorization setting of proportioning, flexible setting of batching cycle, arbitrary adjustment of action sequence and arbitrary setting of batching (feeding and discharging) speed. It features fully automatic continuous cycle batching, fault identification, type alarm, data saving, real-time report printing and other functions.

The two-speed belt scale is a metering belt conveyor equipped with an electronic weighing device. It mainly consists of driving and driven rollers, annular belts, cycloidal pinwheel reducers, material baffles, Weighing modules, etc. The signal of the belt scale is input into the weighing instrument, and through the weighing instrument, it realizes automatic zero adjustment, interval adjustment, code hanging calibration, static calibration, current output and communication functions. The belt scale is mechanically equipped with a deviation device to ensure that the belt conveyor operates in good condition for a long time. The fulcrum is supported by rubber ear shafts without moving friction, which have good linearity, long service life, strong water, dust and corrosion resistance, and strong environmental adaptability. The load cell adopts double-layer nitrogen-filled sealing, which has good stability and is not easy to be damaged. This dual-speed regulation belt scale helps to reduce pure lag time and can alleviate the impact when the material volume changes significantly. Each scale will need to be equipped with a variable frequency speed regulation device, a photoelectric encoder and its processing unit, etc.

The belt scale monitors the operation of the system. According to the process requirements, it calculates the mass ratio of each raw material, sets its belt as the main belt, and regards the speed of the main belt as constant. Through the mass relationship, it calculates the speed of the other three materials on the belt, converts this belt speed into a standard current (voltage) signal, and the controller will change it to the speed of the slip motor. The motor drives the belt to rotate and convey materials. Detect the flow rate of the material on the belt, and the actual voltage value output by the ionization chamber is uniquely corresponding to the flow rate. When the weighing instrument receives the voltage signal, the material flow rate can be calculated according to the corresponding relationship. By integrating the flow rate, the cumulative mass of the material can be obtained. By comparing with the standard value, an output control signal is obtained. The controller controls the motor speed according to the control signal, causing the belt speed to change accordingly, thereby achieving the control of material content.