The dosing screw pump is a single screw conveying pump, and its main working components are an eccentric spiral screw (called rotor) and a screw liner (called stator) with a double helix surface on the inner surface. Its working principle is that when the electric pump shaft rotates, the screw rotates around its own axis on one hand, and on the other hand, it rolls along the inner surface of the liner. This type of pump is a single screw volumetric rotary pump, which uses the rotation of an eccentric single screw screw in a double screw liner to move the concentrated slurry along the spiral groove from the suction port to the discharge port, achieving the pump's conveying function.