Screw Ship Unloader
key word：Heat exchange element
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Product description
1. Introduction
The bucket wheel unloader is a kind of continuous unloader which uses the bucket wheel rotating at low speed as the reclaiming device to excavate materials. As the reclaiming device of the bucket wheel unloader, the rigid reclaiming bucket wheel has a strong digging ability, so the bucket wheel unloader can be used to unload almost any bulk material. However, in terms of economy, the bucket wheel unloader is mainly used to unload the heavy and loose materials that are easy to agglomerate and are difficult to dig, such as ore, coal, sandstone, soil, salt, etc. According to the classification of bucket ship unloader, bucket ship unloader can be divided into two types: inland river type and harbor type.
2. Characteristics of bucket wheel unloader
The working characteristics of bucket wheel unloader are as follows:
2.1. It is suitable for a wide range of materials. Bucket wheel unloader can operate all kinds of bulk materials, but it is mainly used to unload all kinds of heavy bulk materials.
2.2. It is suitable for a wide range of ship types. The bucket wheel unloader can not only unload all kinds of inland barges conveniently, but also extend the bucket wheel reclaiming device under the deck of the sea going vessel to unload all kinds of sea going vessels conveniently.
2.3. High unloading efficiency. The bucket wheel unloader can often work at the rated productivity. In the tank cleaning stage, the use of the tank cleaning machinery can also achieve high operating efficiency, so the average productivity of its operation is high.
2.4. Little environmental pollution. During bucket wheel operation, except for the bucket wheel reclaiming part, the conveying and transfer links of other materials are all in a closed environment, which will not cause material scattering and dust. The movement speed of each working mechanism is low, so that the vibration of the whole machine is small and the noise is low.
2.5. Low energy consumption. The average energy consumption of bucket wheel unloader is about 0.30kwh/t.
2.6. It is easy to adapt to the wave fluctuation of the ship to be unloaded. The bucket wheel reclaiming device can be designed to swing up and down in a certain range to adapt to the lifting effect of the bucket wheel caused by the fluctuation of the waves of the ship to be unloaded, and realize the protection of the ship unloader when the bucket wheel collides with the cabin, hangs the cabin and the material collapses.
2.7. Because the bucket wheel unloader is generally used to unload the heavy and loose materials that are difficult to dig, the rigidity of the whole machine is large, so the quality and manufacturing cost of the whole machine are slightly higher than other types of continuous unloaders.
3. River type bucket wheel unloader
The river type bucket ship unloader is used to pick up and unload various bulk barges. Due to the small cabin depth of the barge, the materials dug by the bucket wheel are discharged directly to the belt conveyor installed in the center of the bucket wheel; the other way is discharged to the belt conveyor installed on one side of the bucket wheel (usually the belt conveyor with wavy baffle), and then connected with the rear conveying system through the belt conveyor to deliver the materials to the storage yard. Due to the small lifting height, the transfer of materials is easy to achieve, and the structure of ship unloader is relatively simple. The figure shows the fixed River bucket ship unloader. The bucket wheel reclaiming device is hung on the steel frame through the pulley block and the lifting winch, and can move up and down. The material receiving belt conveyor is installed in the center of the bucket wheel.
4. Seaport type bucket ship unloader
The materials dug by the bucket wheel are directly unloaded to the lower horizontal section of the corrugated edge belt elevator, lifted out of the cabin by the elevator, and the thrown materials are transferred by the upper feeding mechanism of the head, then transferred to the terminal belt conveyor by the boom conveyor, central funnel, etc., and sent to the stock yard for stacking. In addition to the necessary mechanism for digging and transporting materials, the ship unloader must also have mechanisms such as complete machine walking, boom pitching, boom turning, head turning, etc., as well as a perfect electric control, operation and safety protection system, with complex structure.
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