The development of screw conveyors is divided into the development of two types of shaft screw conveyors and shaftless screw conveyors. The shaft screw conveyor is composed of screw, U-shaped material trough, cover plate, inlet and outlet, and driving device. There are generally three types of horizontal, inclined and vertical type; while the shaftless rotary conveyor adopts screw modification. It is a non-shaft spiral and is equipped with a replaceable lining body in the U-shaped groove. The structure is simple. The material is fed from the feed inlet and pushed through the screw and then discharged from the discharge outlet. The entire transmission process can be performed in a sealed tank. In general, the screw conveyors we usually refer to refer to screw conveyors of the shaft type.

For many materials that are difficult to transport, people have been looking for a reliable transport method, and the shaftless screw conveyor is a better solution.

From the middle of the 17th century, the aerial ropeway was used to transport bulk materials. By 1887, the screw conveyor was invented by Archimedean and later improved. It was widely used in industry to transport bulk and solid materials, and then it took a long time. The development of time has led to the development of a series of screw conveyors that have allowed the screw conveyors to grow.

GX-type screw conveyor is an early screw conveyor, and it is also the most common production equipment for stereotyped production in China. It is mainly used for conveying powdery, granular, and small bulk materials, and is not suitable for the transport of perishable, sticky, easily agglomerated materials and large materials, because these materials tend to stick to the spiral and rotate along with them, or The phenomenon of blocking material at the bearing of the suspension brings great inconvenience to the material conveying process. The main advantages of the GX screw conveyor are energy saving and significant reduction in consumption. Its head and tail bearings are moved to the outside of the housing. It has good dust-proof sealing, low noise, strong adaptability, convenient operation and maintenance, and inlet and outlet positions. The layout is flexible; the disadvantage is that the power consumption is high, the wear of the parts is fast, and the materials are severely crushed during transportation.

The LS screw conveyor is a new generation screw conveyor modified on the basis of the GX conveyor. The LS screw conveyor features novel structure, reliable performance, advanced technical specifications, wide application range, and remarkable energy saving and consumption reduction.