Drum conveyor or spiral tube conveyor is a new type of transportation equipment, mainly used for horizontal transportation of materials. Its working principle is to connect spiral blades inside the cylindrical body. Due to the rolling of the cylinder and the frictional effect between the material and the cylinder, the material is lifted under the effect of material weight.
The material rolls downwards along the spiral surface of the blade and moves axially. When the material is fed into the machine through the inlet, it is introduced into the body by the inlet spiral body and transported to the discharge port along with the rolling of the simplified body; The drum conveyor consists of a drum, rollers, supporting wheels, inlet and outlet ports, and a gear reduction motor. In addition to inlet and outlet ports at both ends of the drum, several inlet or outlet ports can also be set in the middle of the drum according to the application requirements. Each inlet and outlet port is equipped with a sealing device to avoid material leakage. In order to prevent dust from overflowing due to certain air pressure when entering the material, a material seal or suction port can be added to the inlet port according to the needs.
The central feeding port equipment consists of a fixed upper and lower shell and an arc-shaped blade feeding tray installed on the cylinder to roll with the simplified body. After the material enters from one side of the shell through the feeding port, it is introduced into the cylinder through the rolling feeding tray to transport the material. The central feeding port end of the rubber belt working line is equipped with a valve to control the feeding amount. Because the guide blades of the feeding tray are made into an arc shape, when the central feeding port valve is closed and the feeding is stopped, the material transported in the belt conveyor cannot overflow from the feeding tray.

Therefore, the central feeding port equipment can only feed and cannot discharge. In addition, the central discharging port equipment has a fixed shell and is equipped with two opposite arc-shaped opening and closing doors on the cylinder that roll with the cylinder. The rolling shaft led out by the opening and closing door is operated to open and close outside the shell and is fixed by a positioning device. The discharging port can be freely selected for discharging.

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