The explosion-proof electronic formula scale mixes materials according to the certain mixing ratio of the reaction tank and the corresponding additives. During this process, various reagents are poured into the mixing tank and transported through the corresponding auxiliary pumps. Then, the mixer is controlled by the variable frequency motor to mix the materials evenly, thus forming a new type of mixed material. The entire weighing control system consists of PLC, weighing instrument, Electronic scale, frequency converter, motor, mixer, weighing module, servo conveyor, etc. During the PLC control process, the weighing instrument communicates with the PLC through serial port to monitor the operation status and data content of the weighing instrument, and reads the internal status of the PLC and the real-time data of the weighing instrument, and displays it on the PLC. This explosion-proof electronic scale can automatically complete the feeding and batching of various different formula materials, integrating functions such as material storage, quantitative feeding, weighing, and sealed conveying. The entire process is controlled by a microcomputer, adopting advanced technology and excellent performance, and the system structure is compact. Through the operation of the terminal equipment, various data in the multi-material and multi-formula environment can be input and output; the centralized monitoring system realizes automatic control by using PLC, human-machine interface, and configuration software, with functions such as on-site monitoring, fault alarm, data collection, recording, statistics, query, and printing of the automatic process.

The Weighing system will display real-time values such as flow rate, load, cumulative value, and temperature. The temperature display is achieved through the on-site temperature sensor, the pressure display is completed through the on-site electronic scale weighing display, and the current of the motor is transmitted to the central control compartment through the on-site remote transmission method for centralized display. The frequency converter is equipped with an automatic switching switch and communicates with the main control PLC, and the electronic scale batching control unit is mainly composed of the weighing instrument, and the PLC serves as an auxiliary control system. The human-machine interface displays the proportion parameters and monitors the real-time data. In the automatic control mode, clicking the "Start" button on the control panel of the previous batch or the "Start" button on the control cabinet of the previous batch, the weighing instrument will open the valve according to the preset target quantity formula. If the weighing system detects that a certain batching valve is not closed, it will issue an alarm, and the system will enter a pause state. Each metering valve has a preset range value. When the weighing instrument detects that the weight of the electronic scale reaches the set value, the electronic scale will subtract this pre-value, and then control the weighing instrument to close the feeding valve. The pre-value can be manually corrected or automatically corrected to ensure that the batching accuracy of the weighing instrument in each control can reach the set target value.

The explosion-proof electronic scale can quickly compensate for the material changes caused by the volume density change. The operator inputs the required mixing ratio on the touch screen operation panel of the electronic scale. Each material conveying electronic scale is equipped with a complete feeding pump. The batching PLC monitors the actual feeding speed of each quantitative component and regularly adjusts the feeding speed of each component to maintain the preset mixing weight ratio. All materials flow into the mixing tank for uniform mixing. The electronic scale batching adopts the latest microprocessing technology, the input, storage and printing of the formula, as well as the material control and process control have been fully automated, and can adapt to different application requirements.