The quick loading hopper scale is designed to meet the process requirements for raw material blending. It conducts processes such as weighing and mixing to prepare a mixture with qualified composition and moisture content, and then feeds it into the storage bin. The Weighing system mainly consists of weighing instruments, Weighing modules, and a host computer. Its main working principle is to transport materials through a conveyor belt to the hopper machine. Below the hopper machine, there are three weighing modules. The weighing modules convert the measured weight signals of the raw materials into electrical signals. The weighing instrument receives the signals converted by the A/D conversion chip and processes them. If the weighing value is about to approach the given value, the weighing instrument issues a control command to control the oscillation device below the hopper machine, slowing down the oscillation speed and reducing the rate of raw material discharge until the weighing value reaches the set value.

The entire hopper scale is fixed on the three weighing modules. On the side bottom of it, there is a hopper door that can be opened and closed by an electromagnetic pneumatic valve for timed and quantitative discharging and feeding (when the hopper door is open, the materials inside the hopper scale are discharged, while when the hopper door is closed, the materials can enter the hopper scale from above through an electric vibrator or a spiral cutter). It is a measuring device composed of a hopper container and a hopper-shaped container. The weighing hopper system consists of storage bins, pipeline pumps, weighing hopper machines, weighing modules, pneumatic discharge control valves, connecting pipelines between them, and a control system (for judging weighing data and controlling the on-off of pipeline pumps) and so on. The weighing system collects weighing data, judges weighing errors, and controls the power supply of the pipeline pump in the control system to ensure that the weight injected into the weighing hopper machine reaches the lower limit of the error without exceeding the upper limit. The quantitative weighing and loading system is mainly composed of large steel structures, loading equipment, weighing system, hydraulic system, electrical control system, and software system. The purpose of the buffer bin is to store a certain amount of materials to ensure that there are sufficient materials for loading during normal operation, thus avoiding frequent startup of the material conveyor; the quantitative weighing and loading system is used for rapid and accurate loading; the loading equipment is used to control the coal flow during loading; the hydraulic system provides power for various equipment; the electrical control system is used for monitoring and automatic control of all equipment in the loading system; the automatic lubrication system provides lubrication for the loading equipment to ensure its service life; the software system is used to issue various control instructions, adjust the loading accuracy, monitor the operation status of each equipment, and record and store loading records and alarm information.

The hopper scale mainly includes weighing display function, blending drop correction function, powder breaking arch function, automatic zeroing function, and formula storage function. The weighing system can store several sets of formulas and will not lose them even in the power-off state, and can be called and modified at any time. Before shutting down, the weighing instrument can remember production parameters, including the compensation values for the drop of different raw materials. The currently applied Measurement system is mostly strain-type weighing modules. The elastic element uses strain gauges to convert the material mass into micro-strain signals. The bridge circuit is converted into an analog signal with a positive relationship to the external force value. Through physical calibration, the accurate mass value can be clearly determined. The weighing instrument of the hopper scale must be set reasonably according to the standard requirements for the feeding amount of different materials. After entering the automatic blending program, the feeding mechanism can transport the materials into the hopper scale, and the stop time of feeding can be clearly determined according to the drop compensation coefficient of different materials. When the weighing hopper machine stabilizes, the weight value is read, and the set value is compared. The comparison result is used as the basis for the next drop correction coefficient. If the current blending uses the actual measured drop value and drop compensation value of the previous blending, drop compensation can be achieved. By this method, the following goals can be achieved: As the number of ingredient additions continues to increase, the measurement accuracy of the ingredients will be correspondingly improved.