The auger is widely used in various sectors of the national economy such as the food industry, building materials industry, chemical industry, machinery manufacturing industry, and transportation industry. Screw conveyors are mainly used for conveying various powder, granular and small block materials. The bulk materials conveyed include grains, beans, flour and other food products, cement, clay, sand and other building materials, salts, and alkalis. , Chemical fertilizers and other chemicals, as well as bulk bulk cargoes such as coal, coke and ore. Screw conveyors are not suitable for conveying materials that are perishable, viscous, large in size, and easily agglomerated. In addition to transporting bulk materials, screw conveyors can also be used to transport various finished items. The screw conveyor can complete mixing, stirring, cooling and other operations while conveying materials. In ports, screw conveyors are mainly used for unloading trucks, ship unloading operations, and horizontal and vertical transportation of bulk materials in warehouses. The screw unloader, which uses the horizontal screw shaft in direct contact with the material to unload the material layer by layer from both sides of the carriage, has been successfully used in domestic ports for many years. The screw ship unloader consisting of a horizontal screw conveyor, a vertical screw conveyor and a relative screw reclaimer has become a more advanced continuous ship unloading model and is increasingly widely used in domestic and foreign bulk cargo terminals.