The Reaction automatic feeding system (e.g. dosing container with weighing device) reads the weight value at regular intervals, and the difference between the two weights is used to calculate the reduction per time unit (instantaneous flow rate). The weighing controller compares the actual measured value with the preset flow rate value, and at the same time controls the rotational speed of the auger feeder to regulate the feeding volume. When the weight of the material in the hopper reaches the minimum set value, the charging valve will be opened automatically to carry out the periodic charging operation. In order to ensure the correctness of the weighing results, an appropriate filter can be selected to filter the weighing signals during the measurement process.
020-34563445The automatic feeding system for reactions automatically and quantitatively adds two or more materials in a certain weight ratio to the batching tank. The stirring motor starts and stops after the specified time. When the stirring motor is turned off, the material is ready to be sent to the material tank under the drive of the magnetic pump. The weight is generated by the weighing module and the weighing instrument. The weight signal generated by the weighing instrument is amplified by the module and then collected by the PLC and computer. When the preset weight is reached, the PLC drives to close the pneumatic valve, and one batching process is completed. The process of automatic discharge after mixing to meet the predetermined requirements.
At the beginning of each batching cycle, the difference between the previously set feeding amount and the actual feeding amount is taken as the compensation value for the feeding amount set in this cycle to eliminate the cumulative error of the feeding amount for each scale. The entire automatic feeding system consists of a weighing module junction box, weighing instrument, wiring cabinet, and PLC control cabinet. The main hardware components include two computers, high-performance microcomputer controllers, human-machine interfaces, high-speed and high-precision weighing units, and internationally renowned low-voltage electrical appliances. Combined with self-developed professional control software, it realizes the automatic control of chemical liquid production. Set two working modes: "automatic" and "manual". The "manual" mode is to complete a certain control link separately, such as separate "feeding", separate "stirring" and separate "discharging". The "pause/Continue" key can be used to pause, and parameters can be modified in the pause state. "Automatic" operation is to complete a full cycle control period, including feeding, stirring, discharging and other links. During "automatic" operation, only the "pause/Continue" key is valid, all "manual" keys are invalid, and parameters cannot be modified. It has an immediate stop function: When the "Stop" key is valid, any control process will stop and return to the weight display state. It has a zeroing function: Pressing the "Zeroing" key in the weighing state can return the displayed value to zero. If it exceeds the zeroing range, it cannot be zeroed and an error message will be displayed. It has a tare function. When in the weighing state, pressing the "Tare" key will deduct the displayed weight as the tare weight. Pressing the "Tare" key again will restore the original displayed weight.
