BELT COVERS
Ventilation dams also called "belt culverts" or "field sluices" are designed to separate the flows of fresh and used air in galleries with conveyor belts. They are adapted to be built into a wall dam, in which there should also be a sluice passage for the crew and possibly an adjustment window.
The structure of the dams can be dismantled many times and moved to another place, where there is a conveyor belt of the same size.
The structure of the ventilation dam is designed for the route of the "Gwarek 1000 and 1200" belt conveyors. It can also be adapted to other types of belt conveyors. It is built in a wall dam on a straight section of the pavement over a length of about 4 m, on the conveyor route without a loop, turning station and drive. A tunnel is built within the wall dam above the conveyor belt. The bottom wall of the tunnel is the upper conveyor belt. The upper wall of this tunnel is a series of profiled sheet metal segments, between which there are aprons made of a conveyor belt. The aprons, sliding on the layer of excavated material, give the effect of a labyrinth seal.
Sealing between the lower edges of the sidewalls with the moving conveyor belt is solved by the use of friction elements of the conveyor belt strips. In turn, the sealing of the lower surface of the belt and the entire lower belt was solved by pressing the edges of the middle and bottom sealant to the surface of the belt. The seals are profiled to the shape of the tape they seal, and their edges are lined with a rubber tape. Constant pressure of sealants to the surface of the conveyor belt is obtained by their inclination with simultaneous pressure of spring inserts. The number of built-in segments, aprons and sealants is selected depending on the air pressure difference that the dam is to provide.
The construction of the dam allows the construction of any number of segments. It is most advantageous to individually adjust the dam to specific local conditions in the mine. This results in the best sealing and significant reduction of dust in the air within the dam.
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Technical data for Gwarek-1000 (Gwarek-1200).
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Height: 1700mm (2100mm).
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Width: 1200mm (1900mm).
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Number of built-up segments: 3-9 (3-10).
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Air pressure difference: up to 1000 Pa (up to 1000 Pa).
Advantages of using there
Possibility of installing any number of segments depending on the required air pressure difference. Easy to replace aprons and sealants. Eliminating dust around the dam.