Hydraulic and earth engineering – Miscellaneous
Patent
1988-12-21
1990-06-19
Taylor, Dennis L.
Hydraulic and earth engineering
Miscellaneous
37 58, 405258, E02F 388
Patent
active
049348744
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for transporting sludge, particularly in the clearing of sludge galleries in underground mining, i.e. for the collection of sludge from the floor and the intermediate underground transportation thereof, with a mobile transfer device having a clearing shovel and a pump connected to a conveyor pipeline.
BACKGROUND OF THE INVENTION
The waste waters forming in mining galleries, the so-called pit water, is collected in sludge. Such sludge galleries are provided in the area or underneath the deepest mining floor and serve solely for the collection of the pit water, which is evacuated from there to the surface with the aid of pumps. In a sludge gallery, the heavy particles collect, i.e. the sludge settles at the bottom, so that after such a sludge gallery is pumped empty of the pit water, the resulting sludge is aspirated from the floor and then as a rule transported via conveyor trucks to the surface.
From the Trade Journal of the Ruhrkohle Aktiengesellschaft 2/85 (BAG Niederrhein), an apparatus is known which sweeps together the sludge under water and then aspirates it through pumps. A clearing shield is provided on a movable bridge and swingably supported thereon, with an eccentric worm pump hanging in front of the clearing shield which aspirates the collected sludge, and after further treatment, for instance dewatering through centrifugal action, the sludge is transferred to large conveyor trucks, which carry the material to the surface. In this known system, a first disadvantage is that the permanently is stationarily located in such a sludge gallery, and as a result is not available for other operations, e.g. for another sludge gallery. Another disadvantage is also the considerable deployment of machines, whereby due to the relatively watery material, the intervention of a solid-jacket worm centrifuge is required. Only after the treatment in this centrifuge does it becomes possible to evacuate the material in open 3000 1 trucks.
OBJECT OF THE INVENTION
It is the object of the invention to create a mobile apparatus for the collection and transportation of sludge, capable of handling sludge with a high content of solid material.
SUMMARY OF THE INVENTION
The object is attained according to the invention in that the transfer device is a mobile unit having a loading shovel which can be raised and lowered, at whose rear wall a transversely positioned screw conveyor is provided inside the shovel, the conveying point of this conveyor coinciding with the opening of a suction pipe of a pump, which is built as a high-pressure piston pump and that above the screw conveyor a stamping mill is provided to act upon the sludge in the screw with stampers being provided for this purpose.
Such a pumping apparatus is widely usable, since it represents a mobile unit, and can be used in the established sludge gallery, as well as in other sludge galleries, and also in other areas. The raisable and lowerable loading shovel makes it possible to safely collect the sludge and to direct it in a controlled manner via the screw conveyor located at the rear wall towards the high-pressure piston pump having control valves, through which the sludge is then directly loaded into trucks through the conveyor pipeline. Due to the stamping mill, it is insured that each time an optimal mixture of the solids and the remaining residual water in the solids is achieved, so that the formation of bridges is prevented. In this way, a sludge with a high content of solids reaches the high-pressure piston pump, and subsequently the trucks. Based on this concentration of solids in the sludge, it is even possible to further move the thick sludge over belt conveyors, in an operationally safe manner. The screw conveyor also makes sure that the high-pressure piston pump is steadily supplied with sludge, so that a uniform uninterrupted volume of the stream, and thereby a uniform loading of the pump, is insured. The controlled valves of the high-pressure piston pump insure a high efficiency and a uniform opera
REFERENCES:
patent: 2952083 (1960-09-01), Forkner
patent: 3122398 (1964-02-01), Tucker
patent: 3362752 (1968-01-01), Densmore
patent: 3393942 (1968-09-01), Hanaya
patent: 4024655 (1977-05-01), Schweitzer
patent: 4255882 (1981-03-01), Verboom
patent: 4785560 (1988-11-01), Hanson
Beyer Wilhelm
Hove Klaas T.
Kleer Johannes
Dubno Herbert
Lianides Ronald
Saarbergwerke AG
Taylor Dennis L.
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