According to the characteristics of the installation, the belt conveyor can be divided into three types: fixed, mobile and rack retractable. Fixed belt conveyors are generally used in applications where the amount of conveyance is large and the service life is long, and the frame and components cannot be arbitrarily removed. The mobile belt conveyor is used in applications where the distance is short, the transportation volume is small, and the construction site often changes. The structure is light and the wheels or tires can be moved freely. The frame of the telescopic belt conveyor is assembled from a number of short frames, and the short frames are connected by bolts or hooks. Such belt conveyors are typically employed where the length of the transport is often changed and often moved.