Screw conveyor is a major industrial and agricultural departments mechanization transportation job unit, can make the shipping work to reduce the intensity of labor, improve work efficiency, a wide range of applications. Applicable to various industries, such as building materials, chemical industry, electric power, metallurgy, coal, food and other industries, applicable to horizontal or oblique conveying powder, granulated and small lump materials, such as coal, ash, slag, cement, food, etc