The shaftless screw conveyor has an appropriate rotational speed.

The spiral blade of the shaftless screw conveyor is cast from stainless - steel material through a special mold. Therefore, it has sufficient strength and stiffness, and the blade surface is smooth and burr - free. It also has an appropriate rotation speed, effectively ensuring that no dirt entanglement or blockage occurs during the process of conveying grid slag. At the same time, the spiral blade will not deform even when the conveying volume is large.

The shaftless screw conveyor consists of a shaftless screw, a U - shaped screw trough, a cover plate, a liner plate, an inlet/outlet, a discharge port, and a driving device. Materials are input from the inlet, pushed by the shaftless screw, and then output from the outlet. The driving device is placed at one end of the screw conveyor. It adopts a direct - connection form between the motor - reducer and the screw drive shaft, eliminating the need for a coupling. This makes disassembly and maintenance convenient. The drive shaft can withstand the load of the bending moment and axial extrusion force acting simultaneously. The driving motor is suitable for 380V, 3 - phase, 50Hz. Its protection level is IP55 (outdoor type), and the insulation class is F - grade. The wear - resistant lining in the U - shaped screw trough is set in a semi - circular shape, and its arc is set to match the radius of the shaftless screw body to reduce excessive clearance and improve the conveying effect. The wear - resistant lining is made of high - wear - resistant nylon material, which is convenient for installation and replacement and has a long service life. The U - shaped screw trough is made by rolling stainless - steel plates. Except for the open inlet, the rest of the parts are closed with a flat cover along the screw trough. The entire transmission process takes place in a sealed trough, reducing noise and the discharge of odors. A discharge port is provided at the bottom of the U - shaped trough, and a drainage ball valve is equipped.

The shaftless screw conveyor has no high - speed rotating parts, resulting in low wear of the transmission screw, low energy consumption, and low noise of the equipment. The shaftless screw conveyor is easy to install. It only needs to use expansion bolts to fix the steel support on the concrete foundation. It can operate intermittently or continuously for 24 hours a day. The shaftless screw conveyor is equipped with an overload protection function in the electrical design, which can ensure the safe and effective operation of the shaftless screw conveyor around the clock. The electrical components for controlling the shaftless screw conveyor are included in the on - site electrical control box of the grid. For specific control requirements, please refer to the electrical control part of the grid.