Screw conveyor is also known as screw lift conveyor, vertical screw conveyor. The screw conveyor can be lifted, lowered or lifted down at the same time, saving space, simplifying the production process, improving work efficiency, mainly used in various floors and overhead areas such as limited space and other conveying occasions;Screw lift conveyors adapt to a variety of different conveyer applications. The screw conveyor can rise or fall, and in some cases the conveying material can even be reversed.Products are delivered continuously up or down in a batch flow. The screw conveyor occupies a small space range and saves a considerable amount of space area than other traditional solutions. Single batch screw conveyors can be equipped with tangential extensions in the feed and discharge sections to facilitate smooth and stable transitions between the upstream and downstream conveyors.