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In the logistics industry mature developed now, the use of artificial discharging is unwise and unrealistic, the development of automation equipment for screw ship unloader appear in people's field of vision, the main principle is to use the continuous conveyer, independent material feeding, various material cabin is put forward. In this way, the unloading efficiency can be greatly improved, and there will be no pollution during the unloading process, which is clean and environmental friendly. However, due to the large screw unloading machine, if you do not pay attention to it, there will be some damage, so you need to check before starting.

（一）Before boarding, check whether there are operators and obstacles in the running track and moving range of the ship unloading machine; Check whether the anchoring device, anti-climbing iron wedge, windbreak cable and wheel clamp are complete and intact, and remove the anchoring device, windbreak cable and anti-climbing iron wedge to make them in non-anchoring state.

（二）For transfer boarding, the unloading machine shall be inspected and confirmed along the boarding route. Check the main cable for distortion, trauma and loosening of fixation; Check whether the funnel system is intact; Check the safety condition of the grab connection and the abrasion of the grab wire rope, and report and deal with any abnormality.

（三）Check whether wire rope and wire rope joints are normal; In case of looseness, it shall be tightened.

（四）Inspection on beam before and after the ship unloader, confirm the main car, rope trolley track whether there is any obstacle and mobile scope, trolley track without exception.

（五）Inspect the abrasion condition of wire rope and brake disc of hoisting opening and closing mechanism and trolley tensioning mechanism.

（六）Check each lubrication point lubrication of the ship unloader, check whether oil tank, the place such as reducer oil meet the requirements.

（七）Check the normal operation of each drive, transmission mechanism and working mechanism, electrical circuit, electrical equipment and protective facilities, hydraulic device and actuator.

Normal machinery, careful inspection, correct operation, rigorous records, can let the screw ship unloader play a bigger and better role.