It is composed of a drive device to seal the tank and a spiral to push the coal in the tank and output it by rotating the spiral.

Characteristics are: simple structure, small cross-section size, good sealing, reliable work, low manufacturing cost, easy to intermediate loading and unloading, conveying direction can be reversed, but also to the opposite two directions at the same time. During the conveying process, the material can also be stirred, mixed, heated and cooled. Material flow can be adjusted through loading and unloading gates. However, it is not suitable to transport easily metamorphic, viscous, easy to caking and large materials. In the conveying process, the material is easy to break, and the screw and groove are easy to wear. The unit power is large. In use, it is necessary to maintain the tightness of the tank and the appropriate gap between the spiral and the tank.

vertical screw conveyor is suitable for short distance vertical conveying. The spiral of the flexible screw conveyor is composed of a flexible shaft and a synthetic rubber blade, which is easy to bend and can be arranged arbitrarily according to the site or process requirements for space transportation. The screw conveyor blade has a current pull type and a whole pull out, the current pull type can be made into any thickness and specification size, the whole pull type is not suitable for making non-standard screw.

From the Angle of conveying material displacement, Hongtai screw conveyor is divided into horizontal screw conveyor and vertical screw conveyor two types, mainly used for a variety of powder, granular and small block loose materials such as horizontal transportation and vertical lifting, the screw conveyor is not suitable for conveying metamorphic, viscous, easy to caking or high temperature, fear of pressure, there are large corrosive special materials.

The screw conveyor is generally composed of three parts: conveyor body, inlet and outlet and driving device; The spiral blade of the screw conveyor has three forms of solid spiral surface, belt spiral surface and blade spiral surface, of which the blade spiral surface is relatively less applied, mainly used for conveying materials with large viscosity and compressibility, this kind of screw hanging surface type, in the process of completing the conveying operation, at the same time has and completes the material mixing, mixing and other functions