U-type screw conveyor is a kind of screw conveyor, and the production is made according to the DIN15261-1986 standard, and the design complies with JB/T7679-2008 “spiral conveyor” professional standard. U-type screw conveyor is widely used in food, chemical, building materials, metallurgy, mining, power and other departments, mainly for the transmission of small particles, powder, small pieces of material. It is not suitable to transport materials that are easily deteriorating, have larger stickiness, and have higher moisture content.