The belt conveyor is mainly composed of two end rollers and a closed conveyor belt on the tight sleeve. The drum that drives the conveyor belt is called the driving drum (transmission drum), and the other one is only the drum changing the direction of the conveyor belt, which is called the change drum. The driving cylinder is driven by the motor through the reducer, and the conveyor belt is driven by the friction between the driving roller and the conveyor belt. The driving drum is usually mounted on the unloading end to increase traction and facilitate dragging. The material is fed from the feed end and falls on the rotating conveyor belt, and conveyed to the unloading terminal by unloading by the friction of the conveyor belt.