The vacuum batching machine is an online measurement and dynamic Measurement system that integrates functions such as conveying, metering, batching, and quantitative control. It utilizes the different structures of various mixing devices to generate relative motion between powder materials, constantly changing their relative positions and overcoming the tendency of material stratification caused by differences in the material. The negative pressure suction and conveying system is a low-pressure suction and conveying system composed of a gas lock, a material gas separator, and a Roots vacuum pump. By using a Roots vacuum pump (or centrifugal fan) to generate a strong negative pressure value, the pressure in the conveying pipeline is lower than the external environmental pressure, effectively avoiding the leakage of toxic and harmful dust. The weighing and batching machine includes a conical hopper scale, a buffer section, and a vacuum pipeline connected in sequence. The conical hopper scale is connected to a feeding main pipeline, and the end face of the feeding main pipeline is connected to a main pipeline control valve. There are also more than one feeding branch pipelines connected to the feeding main pipeline, and each feeding branch pipeline is equipped with an electromagnetic valve. A weighing module is installed on the conical hopper scale below the feeding main pipeline, and a plug valve is also installed at the bottom of the conical hopper scale. A filter is installed in the buffer section. The conical hopper scale is also equipped with a vibration motor near the bottom position. A pulse motor is installed outside the buffer section, which is connected to the filter. The weighing module is evenly arranged on the outside of the conical hopper scale, and there is also an exhaust port near the bottom of the conical hopper scale.

The weighing and Batching system connects different material warehouses to various feeding pipelines, calculates in advance the weight of each material that needs to be weighed, and when one of the materials is weighed, the solenoid valve set on the feeding pipeline connected to that material is opened, and the solenoid valves set on the other feeding pipelines are closed. Vacuum is drawn through the vacuum pipeline, making the conical hopper scale negative pressure. Under the action of negative pressure, the material passes through the feeding main pipeline to the feeding pipeline and then to the conical hopper scale. During the process of the material falling into the conical hopper scale, the weighing module set on the conical hopper scale measures the material; The principle for weighing other materials is the same as above. After weighing, the vacuum inside the conical hopper scale is discharged through the exhaust port, and the prepared materials are taken out by opening the plug valve; It is also possible to install a stirring device inside the conical hopper scale to achieve stirring and mixing functions during the weighing and batching process. In the above work process, by connecting the feeding main pipeline on the conical hopper scale, and then connecting the manager branch pipeline on the feeding main pipeline, each feeding branch pipeline is controlled by an electromagnetic valve, which can achieve automatic weighing and batching of various materials; Setting up filters in the buffer section can avoid problems such as blockage and contamination of the vacuum pipeline caused by the entry of materials into the vacuum pipeline during vacuum suction; The pulse motor connected to the buffer section can blow down the material adhered to the filter into the conical hopper scale, avoiding material blockage of the filter.