1. Principle and structural characteristics of screw conveyor
The working principle of screw conveyor is similar to that of a nut rotating on a screw which does not move axially. In the process of axially rotating movement, the rotating spiral blade in the material trough will push the material to move. The material is fed into the trough body from the feed port, and then sent to the other end along the screw, and discharged from the discharge port. The structure of screw conveyor mainly includes driving device motor, reducer, material chute, screw shaft, screw blade attached to screw shaft, support at both ends, inlet and outlet, discharge outlet and inspection port. The screw conveyor is simple in structure, easy to seal, and uses frequency converter to control the operation. The powder drop is relatively small, which can improve the accuracy of feeding control and measurement accuracy. It has a large adjustable range, good wear resistance and low operating cost. Therefore, it is widely used in concrete mixing station.