Screw machine is widely used in various industries, such as building materials, chemical industry, electric power, metallurgy, coal, coal, food and other industries, suitable for horizontal or inclined delivery of powder, granular and small pieces of materials, such as coal, ash, slag, cement, food And so on, the material temperature is less than 200 °C. Screw machines are not suitable for conveying highly viscous, highly viscous, easily agglomerated materials. In the concrete mixing station, the role of the screw conveyor has been best reflected in .

(1) Screw conveyor is a kind of conveying equipment widely used in chemical, building materials, grain and other departments. It is mainly used for conveying powdery, granular and small-sized materials. It is not suitable for conveying perishable, viscous and agglomerated materials.

(2) The ambient temperature of the screw conveyor is -20~50°C; the angle of inclination of the conveyor is ≤20°; the conveying length is generally less than 40m and the longest is no more than 70m.

(3) Compared with other conveying equipments, spiral conveying has the advantages of simple structure, small cross-sectional size, good sealing performance, multi-point loading and unloading, safe and convenient operation, and low manufacturing cost. Its disadvantages are that the parts wear more severely, the delivery volume is lower, the power consumption is greater, and the materials are easily broken during transportation.