LSY type screw conveyor is special equipment that is in sealed circular section shell and continuous transport material via rotary palladium. It is used to transport a variety of meal, granular material, small block material, such as cement, fly ash and ore fines, etc. LSY screw conveyor has some features of compact form, small cross-sectional area, light-weight, good leak tightness, high transportation efficiency, flexible process collocation and so on. It adopts universal ball joint feed inlet, in order to be propitious to install, product and damp proof. It specially apply for transporting power material from concrete bin to mixer in concrete mixing plant.