Dumper(wagon tippler) is mainly used for unloading the bulk material such as coal, ore and coke which loaded in gondola car. There are types of single car, double car, triple car, four car dumper or tumble dumper, dropsied dumper, side detachable dumper and composite dumper.

When the gondola car is pushed onto the unloading platform, the dumper turns the car 15-170 degrees to make the material be removed completely. The dumper can be either manual or automatic operation, and even can achieve full range of automatic operation, which is easy and safe to operate, and owns high efficiency and high degree of automation. 

Dumper is mainly used in docks, ports and industry of metallurgy and coal. 

Wagon tippler system is a kind of large equipment for unloading bulk goods in open wagon. It’s preferred alternative in the countries that transport bulk goods by railway. Compared to other ways, its advantages are as follows:

1.  Wide range of application. Generally, all kinds of bulk goods in all sorts of open wagons can be well handled.

2.  Efficient and very easy to be automated.

3.  Almost no leftover.

4.  The unloading process is easy to be environment-friendly.

Wagon tippler system's mainly application area includes: port for bulk material handling, power plant's coal-transport system, and raw material feeding system of steel plant, coke plant and large cement plant.

The main frame of wagon tippler system is car dumper, and be equipped with various kinds dispatch vehicle arrangement and safeguards equipment to constitute the unload line.

According to the number of cars that handled every work circle, railway wagon tippler systems can be divided into single wagon tippler system, dual-wagon tippler system and tripe-wagon tippler system. In the electric power plants and steel works that the single wagon tippler system is the most popular one, in the ports that the dual-wagon tippler system is the most popular one, triple-wagon tippler system and larger-sized dumper are the less popular.

Wagon tippler system forms of the layout, working performance, equipment composition and work processes

Wagon tippler system could be run-through model or back-turning model which depends on the layout of empty and full car's tracks.

Run-through model that is dumper's the layout of empty and full line are the same railroad line. The outlet of dumper is empties line.

Run-through model wagon tippler system could be divide to unit-train wagon tippler system, mixed unit-train wagon tippler system and multifunction (can dumping unit-train and mixed unit-train) wagon tippler system. The run-through model system needs fewer equipments and more efficient, but needs more field for the tracks.

The back-turning model system is that dumper in the railroad line tip, empty and full line are parallel arrangement, the outlet of dumper set up the transfer that can be square transfer motion train, the transfer move train from full line to empty line, train can be back from empty line. The back-turning model system needs more equipments and less efficient, but for it at the end of railway, it needs less field and easy to arrange, so it more widely adopted.