The drive (slave) box of the chain conveyor is equipped with support pipes on both sides, which are connected to the drive (slave) box. An 8-tooth sprocket is mounted inside the drive (slave) box. The feeding tube is connected to the support pipes on both sides of the drive (slave) box via flanges. The feeding tube's ends are connected to the corresponding support pipes, and the conveying chain passes through the feeding tube and the holes in the support pipes to connect with the drive sprocket. The feeding tube has a circular cross-section. The conveying chain consists of horizontal and vertical links, all in anchor chain shape. The manufacturer of the pipe chain machine fixes circular plates on the vertical links. This conveyor has a simple and reasonable structure, can be used in narrow and irregular spaces, and is widely used in material conveying.