Scraper conveyor: principle of operation, types, purpose and features

Drag conveyors have gained a huge spread in the coal industry. They can move the load at a fixed discharge chute with scrapers, which are connected to a moving chain. These conveyors are used to transport pulverized, granular and lumpy goods.

Types of scraper conveyors

There are two types of scraper conveyors, which differ from each other in design and principle the movement of cargo.

1 – conveyors with very high scrapers;

2 type – conveyor with submerged scrapers (cargo is moved in a solid mass).

The scraper Conveyor is used for transporting goods that are not subject to fracture, that is, their quality is not reduced for this reason. With these conveyors can move a load with a low strength pieces, as if they are solid, you can start to jam, hitting between trough and scraper.

Scraper conveyor with large scrapers

The Troughs of the scraper conveyor with large scrapers are made of steel with a thickness of 3-8 mm. To increase the service life of the scraper conveyor, scraper on the lower edge soldered one strip of material that is resistant to wear (they can be high-manganese steel). We also used plastic scrapers. The length of the individual elements is determined dependent on the angle of repose, step chain, the size of the pieces of cargo, and height. The length of scrapers that we have chosen, have the best way to ensure filling of the space between the multiple step chains and scrapers. But remember that the length should be slightly larger than the largest dimension of the piece. The shape of gutters can be very different.

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Scraper conveyor with submerged scrapers should have the same performance with much less weight and size than the pipeline with large scrapers. These conveyors have a trough of two parts: one for the unmarried, the second for the working of the branch. The goods must fill out part of the gutter. Thus, when the movement of the load chain moves along the trough.

Conveyors with scrapers immersed in a condition to move a load along the vertical, inclined and even horizontal section of the track. Therefore, they are intended for the movement of small-sized, granular, powdered and free flowing goods. Scraper conveyors with ease and without overloading can lift cargo to a height of 20 meters, move it to a distance of 100 meters, to increase the capacity up to 700 t/h.

The Advantages of conveyors

Among all the advantages of special importance can be given to the excellent cross-section filling the trench and the possibility of movement of the load without overloading on quite difficult slopes and turns.

Disadvantages of conveyor

Disadvantages of the scraper conveyor is less than the benefits, but yet they are. The conveyors wear out rapidly gutters and scrapers, and they expend a lot of energy. More should pay attention to the fact that this device is difficult transportorul sticky, wet and abrasive loads, as they tend to stay between the gutters and scrapers.

Now you know about what scraper conveyor!