Tubular screw conveyors are widely used in the transportation of powdered and granular materials; the tube conveyors are made of carbon steel, with an appropriately finished surface. The main components include: a tube-shaped trough with an inlet and outlet,焊接 flanges at both ends of the tube, spiral blades welded to the tube, couplings with sleeve bushes at the ends of the blades, two end bearing assemblies with self-adjusting shaft sealing units, and an intermediate suspended bearing, the number of which is determined by the overall length of the screw conveyor.