I. Introduction of Screw Conveyor

    Rotating screw blade will push the material and screw conveyor transportation, so that the material does not rotate with the screw conveyor blade is the material's own weight and the friction resistance of the screw conveyor casing on the material. Screw conveyor rotating shaft welded screw blade, blade face type according to the different materials conveyed entity face type, belt face type, blade face type and other types. Screw conveyor screw shaft in the direction of material movement at the end of the thrust bearing in order to follow the material to the screw axial reaction force, in the longer length, should be added to the middle hanging bearing.

    Second, the standard definition of screw conveyor

    Screw conveyor is designed and manufactured in accordance with JB/T7679-95 “Screw Conveyor” standard, which is the replacement product of GX type screw conveyor. Screw conveyor is commonly known as a winch, is a mineral, feed, grain and oil, construction industry, a wide range of uses of a conveying equipment, from the point of view of the direction of displacement of transported materials, screw conveyor is divided into two major types of horizontal screw conveyor and vertical screw conveyor, is mainly used for all kinds of powder, granular and small pieces of loose materials, such as horizontal conveying and vertical lifting. Screw conveyor is made of steel, screw conveyor is used for conveying higher temperature powder or solid particles and other chemical and building materials products. There is a conveying tube inside the screw conveyor, and the blades are welded into the conveying tube in spiral shape.

    Third, the use of screw conveyor

    Screw conveyor is mainly used for conveying powdery, granular and small lump materials, such as coal powder, soda ash, recycled rubber powder, zinc oxide, calcium carbonate and small lump coal, etc. Screw conveyor is not suitable for conveying perishable, viscous and easy to caking materials.

    1、Screw conveyor application scope

    Screw machine is widely used in various industries, such as building materials, chemical industry, electric power, metallurgy, coal mine charcoal, grain, etc. It is suitable for horizontal or inclined conveying of powdery, granular and small lumps of materials, such as coal, ash, slag, cement, grain, etc., and the temperature of the materials is less than 200℃. Screw machine is not suitable for conveying easily deteriorated, viscous, easily caked materials.

    2、Screw conveyor classification

    From the perspective of conveying material displacement direction, screw conveyor is divided into horizontal screw conveyor and vertical screw conveyor two types, mainly used for a variety of powder, granular and small lumps and other loose materials such as horizontal conveying and vertical lifting, the machine is not suitable for conveying perishable, viscous, easy to agglomerate, or high temperature, afraid of pressure, there are large corrosive special materials.

    3、Advantages of screw conveyor

    The screw conveyor is designed and manufactured in accordance with the standard of JB/T679-95 “Screw Conveyor”, which is the replacement of GX type screw conveyor. The head and tail bearings are moved to the outside of the shell, the hanging bearing adopts sliding bearing, equipped with dustproof sealing device, the shaft tile generally adopts powder metallurgy, and the cement conveying adopts felt shaft tile, the hanging shaft and the screw shaft are connected by a slider, so that when removing the screw, the driving device does not need to be moved, and the screw does not need to be moved when removing the hanging bearings, and the hanging bearing can be lubricated without dismantling the cover, so that the whole screw conveyor is of high reliability, long service life, adaptable, and easy to be installed and maintained. Screw conveyor, commonly known as the winch, is a mineral, feed, grain, oil, construction industry, a wide range of uses of a conveying equipment, from the point of view of the direction of displacement of the material being conveyed, screw conveyor is divided into two types of horizontal screw conveyor and vertical screw conveyor, mainly used for a variety of powders, granules, and small lumps and other loose materials such as horizontal conveying and vertical lifting.

    Screw conveyor has the advantages of simple structure, low production cost, strong sealing, safe and convenient operation, etc., the center can be multi-point loading and unloading. Widely used in chemical industry, building materials, metallurgy, grain and other departments, in the case of inclination angle β <20 °, conveying viscosity is not big, not easy to deteriorate, not locust caking powder, granular and small pieces of material.

    Fourth, the technical characteristics of the screw conveyor

    It is composed of closed tank and screw by driving device, and the coal in the tank is pushed out by screw rotation.

    Screw conveyor is characterized by: simple structure, small cross-section size, good sealing, reliable, low manufacturing cost, easy to intermediate loading and unloading, conveying direction can be reversed, but also to the opposite direction at the same time. The conveying direction can be reversed and the materials can be conveyed in two opposite directions at the same time. During the conveying process, the materials can also be stirred, mixed, heated and cooled. The material flow can be adjusted through the loading and unloading gate. However, it is not suitable for conveying easily deteriorated, viscous, easily caked and large materials. The material is easy to be broken during conveying, and the screw and trough are easy to be worn. The unit power is large. It is necessary to keep the sealing of the trough and the proper clearance between the screw and the trough in use.

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