Application and advantages of mobile screw ship unloader

Mobile screw ship unloader is a kind of continuous bulk ship unloader which uses the mechanical rotation of screw mechanism to lift materials vertically and transport them horizontally to the conveying system on the wharf. It is mainly composed of vertical boom, horizontal boom, turntable, gantry and feeder. The vertical boom and horizontal boom are equipped with spiral vane conveyor, and the head of vertical boom is equipped with reverse spiral feeder. The ship unloading capacity is between 100t / h and 3000t / h, and the ship type is 500dwt to 1000000dwt.

Screw unloader is widely used in port, electric power, chemical industry, food and other industries. It is suitable for horizontal, vertical or any angle discharge. It is mainly used for conveying powder, granular or small size materials with small weight, good fluidity and small grinding property, such as cement, coal ash, mineral powder, chemical fertilizer, Cereals, etc. During the unloading operation, the reverse screw feeder at the head of the vertical boom is lowered into the material to be unloaded to loosen and reclaim the material. The material enters the vertical spiral pipe under the action of the feeder. Under the action of the friction between the spiral pipe wall and the spiral surface, the material slides relative to the spiral blade and has a vertical upward motion component, so it is vertically lifted into the horizontal boom, and then passes through the horizontal boom The horizontal screw conveyor in the frame is transported to the predetermined material receiving place.

Screw ship unloader can be divided into mobile type and fixed type according to whether the whole machine is movable or not. Among them, the mobile screw ship unloader has a walking mechanism, which can walk along the track laid on the wharf; the fixed screw ship unloader is more suitable for inland river wharf, and its effective working arm width should meet the needs of ship width, and the operation needs of the captain direction can be met by moving the ship. In addition, there are floating screw unloaders installed on barges, rubber tires or tires on cars.

The main advantages of screw ship unloader are relatively high ship unloading efficiency, simple structure, small mass, good environmental protection performance, simple operation, small clearance capacity, low noise; its disadvantages are poor adaptability to large materials, serious wear of working components, large operation energy consumption, and it is not suitable to transport perishable, viscous and caking materials.