The feeding system accomplishes automatic and manual proportioning control of materials such as powder and liquid. Powder and slurry are dosed at the same time, with fast dosing speed. Discharging order can be adjusted arbitrarily, suitable for process requirements. Theoretical calculation and manual correction of the formula. The graphic interface shows the working condition of dosage, and the operation is intuitive. Recording, printing and report generation of batching data. Automatic and manual control of arch breaking. Intelligent diagnosis of weighing module wiring faults, accurate localization of faulty Weighing modules and faulty wiring, automatic tare tracking. Remote data browsing and printing. Automatic control of temperature and pre-culture temperature, when all materials are put into the mixing kettle for reaction, it needs certain time and temperature because it is chemical reaction. The automatic feeding system automatically controls the temperature of the kettle mixing material. When it is lower than the control temperature of the production process, the system sends a command to open the solenoid valve of the steam pipe to add steam, and when it reaches the set temperature, the solenoid valve will be closed automatically (optional). The system is easy to expand.

The measurement of powder is stored separately in the raw material warehouse on the upper side of the batching building, with pneumatic disk valve installed at the bottom of the warehouse, the outlet of the disk valve is connected to the screw Feeder, and the outlet of the screw feeder is connected to the batching hopper scale through a flexible connection. The powder is measured by cumulative measurement. Measurement of powder is carried out sequentially in accordance with the requirements of the process and recipe.

Powder liquid and slurry metering mixing, in the kettle room after the concentration of qualified, through the pump into the slurry metering tank. The system realizes the automatic measurement of slurry by controlling the start and stop of pump and slurry motor.

Automatic tracking and compensation is added in the system software design. According to the switching characteristics of the automatic correction of the "pre-close" advance, in the material weight to reach the target value before the early closure of the feeding system, to be weighed after the stabilization of the value, according to the size of the difference between the set value and the actual weight of the ingredients by the system automatically fine-tuned to replenish, so as to ensure that the material measurement accuracy requirements.

In order to avoid interference signals for the weighing module signal interference, in the hardware circuit to increase the low-pass filter circuit and power supply DC / DC isolation circuit, in order to minimize electromagnetic interference and influence. In software, the underlying data acquisition thread is programmed using VC, and oversampling and digital filtering algorithms are used to reject illegal sampling values and ensure the accuracy of the metering circuit.

The weighing instrument can effectively prevent the interference of the utility frequency signal, and the digital transmission mode of MODBUS field bus is adopted between the weighing instrument and the system, which completely eliminates the error generated in the transmission process. At the same time, the use of field bus makes it easy to realize the expansion of the system, which can be expanded at any time according to the future production demand without increasing the overhead.

After the mixing kettle is prepared according to a certain ratio, it is added to the mixing kettle and stirred, and the temperature of the mixture is raised by pouring in high-temperature steam. The temperature of the mixture is directly related to the quality of the finished material, so the steam pipeline with electric valves, installed in the mixing kettle next to a set of mobile temperature Measurement system, the system measures the temperature of the mixing kettle in real time, when the temperature reaches the set value, automatically close the steam valve. This can not only ensure product quality, but also prevent energy waste due to untimely valve closure, which helps to reduce the production cost of the product.

The mixing kettle adopts digital temperature measuring IC to measure the temperature of the mixing kettle tank, the weighing terminal connects with the digital radio through data line, and sends the temperature data to the digital receiver of the Dosage system, which connects with the receiver through the communication interface to get the real-time temperature of the kettle, and displays it on the screen of the system in real time, and at the same time, the system controls the opening and closing of the motorized valve for steam charging according to the temperature.

Statistics of dosage data and remote storage and printing of dosage data are firstly stored in the local database of the dosage system, which is equipped with a standard Ethernet interface and connected to the enterprise management system through a network cable. Generally speaking, there is a certain distance between the batching and the management office, and the wiring is more than 100m, which is larger than the allowable distance of Ethernet Category 5 cable. Therefore, installing a network switch between the batching and the management office can extend the effective connection distance to 160m, which can meet the needs of remote data sharing of the system. As the production environment of the batching is dusty, printers and other equipment are prone to failure, so the printer equipment is placed in the better environment of the management office, and the network printing function is used to realize the statistics, printing and storage of production reports. The sorter installs production management and statistics software in the management office system.