Drum screen is a kind of machinery widely used in separation technology. It controls the waste separation through the particle size, and the separation accuracy is high. The cylinder of drum screen is generally divided into several sections, depending on the specific situation. The screen holes are arranged from small to large, and the screen hole diameter on each section is the same. Drum screen is mainly composed of motor, reducer, drum device, frame, sealing cover and inlet and outlet. Working principle The roller device is installed on the frame obliquely. The motor is connected with the drum device through a coupling through a reducer to drive the drum device to rotate around its axis. When the materials enter the drum device, due to the inclination and rotation of the drum device, the materials on the screen surface turn and roll, so that the qualified materials (products under the screen) are discharged through the discharge port at the bottom of the rear end of the drum, and the unqualified materials (products on the screen) are discharged through the discharge port at the tail of the drum. Due to the overturning and rolling of materials in the drum, the materials stuck in the screen hole can be ejected to prevent the screen hole from being blocked. The principle and structure of drum sand screening machine, drum screening machine and drum screen are almost the same, which is due to the difference in people's understanding and name. Characteristic 1. The screen hole is not easy to be blocked. 2. Stable operation and low noise. 3. Simple structure and convenient maintenance. 4. The screening cylinder can be closed, which is easy to close and collect dust. 5. The whole machine has high reliability and less one-time investment. 6. Special screen is adopted, with high screening efficiency and long service life