Spiral slide

from Wikipedia, the free encyclopedia

A spiral chute is a non-mechanical continuous conveyor that is mainly installed in blind shafts . It belongs to the group of gravity conveyors. If you look from above into a spiral slide, we see the so-called in the center spiral eye . The spiral eye is a free cross-section that is only filled when the bunker is filled.

construction

Principle of the spiral slide

The spiral chute is a spiral-shaped channel. It consists of sheets of sheet metal assembled in a helical manner. The individual sheets are built into a closed, cylindrical sheet metal jacket. So-called wear plates made of chilled cast iron or cast basalt are used to reduce wear . These are means Inbussenkschrauben screwed on the spiral sheets. The sliding surfaces of the wear plates are coated with a wear-resistant two-component paint to reduce the surface roughness. For the purpose of corrosion protection, the spiral segments (reversible lobes) are either painted with paint or galvanized. The spiral inlet is at the top of the spiral chute and the spiral outlet at the lowest point. Depending on the length of the spiral chute, one or more level meters are attached from the outside to the sheet metal jacket of the spiral chute. There are inspection flaps in the sheet metal jacket of the spiral chute at regular intervals . This enables access to the spiral slide.

function

The material to be conveyed falls through the spiral inlet onto the spiral chute and, as a result of gravity, slides down on the spiral plates to the spiral outlet. There it falls onto a conveyor belt and is carried away. If necessary, the spiral chute can be used temporarily as a bunker and a certain amount of material to be conveyed can be bunkered in the spiral chute. For metered filling of the conveyor belt, there is a pneumatically controlled spiral flap in front of the spiral outlet, which is opened according to the desired filling level. In order to achieve a higher flow speed in the spiral chute, the pitch (gradient of the spiral) is increased from 1800 mm to 2200 mm in high-performance spiral chutes; in this way, an automatic start-up is achieved after what are known as bunker processes .

Use outside of mining

Helical chutes are also used outside of the mining industry. B. used for the conveyance of goods in logistics centers, for the downward transport of luggage in train stations or of materials in storage rooms. The small space requirement in comparison to a normal slide and the lack of a conveyor drive are advantageous.

Individual evidence

  1. ↑ Ernst-Ulrich Reuther: Introduction to mining. 1st edition, Verlag Glückauf GmbH, Essen, 1982, ISBN 3-7739-0390-1 .
  2. ↑ a b c d e A. O. Spiwakowski, Rudolf Erber, Karl-Hermann Seidl, Erwin Wedel: Mine funding. Handbook for mountain machine engineers, third edition, VEB Verlag Technik, Berlin 1961, pp. 34–37, 340.
  3. ^ A b c d Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining encyclopedia. 7th edition, Verlag Glückauf GmbH, Essen, 1988, ISBN 3-7739-0501-7 .
  4. ^ A b c d e Carl Hellmut Fritzsche: Textbook of mining science. First volume, 10th edition, Springer Verlag, Berlin / Göttingen / Heidelberg 1961.
  5. ↑ Volker Heidenblut: Spiral chutes also serve their purpose in automated intralogistics. Online ( Memento of December 20, 2014 in the Internet Archive ) (accessed on July 10, 2012; PDF; 1.9 MB).

Web links