The weighing bridge of belt scale acts on the weighing sensor through a lever to send the weight of the material detected on the belt to the weighing instrument. At the same time, the speed signal of the belt conveyor by the velocity sensor is also sent to the weighing instrument. The instrument integrates the speed signal and the weighing signal to obtain the instantaneous flow and cumulative amount. The speed sensor is directly connected to the large diameter speed measuring drum and provides a series of pulses, each representing a belt movement unit, and the frequency of the pulse is proportional to the belt speed.

Liquid feeding system is based on computer technology, control technology, communication technology and graphic display technology (i.e. 4C technology), and connects the field control station, control management station, testing station and operation management station and engineer station of operation control center distributed in the industrial site (nearby) through the communication network, and completes the integrated control system of decentralized control and centralized operation and management together. It can fully realize the management automation of each phase of the business process in the chemical industry and other industries, and carry out automated monitoring of each work process of the user, thus assisting the user's management personnel to carry out business processing more efficiently and accurately.

Powder feeding system is divided into material storage, dosage, measurement and dosage control system and electrical control system, of which the control system has two operation modes, automatic and manual, easy to operate, flexible control, which can meet the various needs of the production, and has a high degree of practicality. It can be adapted to powder, granule, liquid and other materials dosage, mixing control. It is a visualized computer operating system designed and developed for monitoring and automated batching in the batching section. It is characterized by simple and convenient operation, high reliability, friendly man-machine interface and complete functions.

The formula, feeding and discharging of the hopper scale are all controlled by computer. In addition to the hopper, the scale has a dynamic weighing module, a precision amplifier, an analog/digital converter, a micro-computer, a display, a printer and an execution system. It can simultaneously display the batching process and print the name of each material, quality, total quality, cycle time, formula, daily report, monthly report and so on. Computerized automatic batching production line has large storage capacity of formula, many varieties of batching, high speed, high accuracy, abundant available software, convenient program modification, and is a product with high degree of automation. Through the weighing instrument or touch screen, the required weight of various materials is set, and automatically conveyed to the hopper in sequence for automatic weighing and flow control, so as to realize accurate measurement and batching.

Measuring and feeding system provides a large amount of data information for production management, such as the list of batching results, the list of raw material consumption, the list of production volume, the record of formula use results, etc., and can be used to produce shift reports, daily reports, monthly reports, annual reports and other statistical and printing functions according to the time, formula and so on. At the same time to provide two kinds of user-defined system components, one is to use the weighing system for secondary design; the other is to embed the data seamlessly into the EXCEL system. The system can interact with other management ingredients to meet the requirements of deep data analysis.

Weighing and feeding system mainly displays multiple sensors and weighing instruments, and outputs multi-stage control signals. Users can directly access PLC raw material system and terminal control system to realize multi-stage control and automatic control. According to the pre-determined formula, all kinds of different raw materials are mixed proportionally. In order to improve the accuracy and speed of batching, ensure the quality of products and increase the output, microcomputer control technology is adopted. Microcomputer-controlled matching production line.

The automatic batching scale is used to feed different raw materials into the respective hopper in the feeding equipment, then feed into the weighing hopper according to the given ratio of the formula, and weigh, and then feed into the mixing machine for a certain period of time for mixing, and evenly mixed into finished products. Various fixed formulas are inputted into the computer beforehand, and the computer controls the discharging, weighing and mixing according to the proportion of the formulas, and detects the signals of the weighing module in real time, makes a judgment, and sends out the commands to each actuator of the dosage, so as to realize the automation of the dosage. The whole production system is equipped with a manual control auxiliary mechanism, which can control the operation according to the automatic or manual working mode.

The automatic feeding system mainly completes the data state acquisition and output control of the relevant analog and switching quantities of the on-site equipment. The touch screen is used in conjunction with the metering tank PLC, which makes the application of the tank PLC more flexible. The touch screen can set parameters, display data and depict the production process in the form of animation, which makes the application of PLC visualized. The weighing system uses RS232 interface to connect the touch screen to the PLC via communication cable. The remote touch screen (HMIA) and the local touch screen (HMIB) are connected via Ethernet, both of them can display the instrument data and equipment status, and both of them can control the field equipment.

The weighing and feeding system is usually used for batch mixing of two or more raw materials in proportion to each other, and programmed to make the batch mixing continuous, so as to achieve uniformity in the mixing ratio. The human-machine interface is used to input the corresponding proportioning parameters, the signal of each weighing scale is transmitted to the weighing instrument through the load cell, and then the signal is converted by the weighing instrument and connected to the central controller, which, combined with the set formula and according to the real-time data of each weighing unit, controls the charging time and the amount of each kind of material, when all the raw materials are weighed and finished, they all enter into the reactor, and then, after sufficient mixing, enter into the dosing kettle by means of screw or gravity. After sufficient mixing, they will enter into the dosage tank by screw or gravity.