Screw contrast abroad

    The main properties of the screw conveyor and parameters have not meet the demand for high-yield and efficient mine , especially trough screw conveyor scalable key

components and their functions , such as self-moving tail, efficient storage and belt and tensioning devices abroad has a big gap. Main differences are the following:
    ( 1 ) Installed power : vertical conveyor My working face retractable screw machine maximum installed power of 4X250KW, foreign products up 4X970KW, screw machine -made foreign products

installed power of approximately 30% -40% .
    ( 2 ) transport capacity : the maximum volume of screw conveyor is 3000 t / h, abroad reached 5500 t / h.
    ( 3 ) Maximum Belt Width : My screw machine is 1400mm, the largest foreign to 1830mm.
    ( 4 ) with speed : As trustee roller speed limit , our spiral conveyor belt speed of 4 meters 90 degree turn conveyor per second, is 5 meters or more foreign
    ( 5 ) working face Transport Length : our country is 3000m, foreign to 7300m.
    ( 6 ) self-moving tail: As the face of the emerging high-yield , scalable requested trough screw conveyor tail With the rapid advance of face and fast self-moving . Domestic

self-moving tail mainly rely on imports .
    ( 7 ) Efficient storage belt and tensioning device : the band structure of a closed reservoir mainly tensioning easily derailed car , conveyor Yi deviation, telescopic

conveyor belt when the car is not self-moving roller , need manual goes on, overhaul trouble. Adopt foreign advanced structure with open storage devices and high-precision ,

high-torque , large stroke automatic tensioning device , roller conveyor with telescopic trolley can automatically place. Conveyor belt Yi deviation, the phenomenon does not

appear derailment .
    ( 8 ) Conveyor varieties: varieties of small models , single function , the use of limited scope and can not give full play to its performance, in addition , China's coal

mine geological conditions vary widely, the layout of the transport system often some special requirements, such as bending , large angle until the vertical lifting , etc.,

should be developed machines of special type of screw conveyor .