Material or article handling – Chamber of a type utilized for a heating function and...
Patent
1985-08-28
1987-07-21
Werner, Frank E.
Material or article handling
Chamber of a type utilized for a heating function and...
198509, 198511, 414139, 414140, B65G 6300
Patent
active
046815031
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a method and a device for unloading of bulk material from a large container, in particular from a ship of the type utilizing an endless circulating conveyor belt with transversely aligned entraining cleats.
In the case of known methods and devices of this kind, e.g. as apparent from the DE-OS No. 31 02 731, a special implement for reception of the bulk material, for example a bucket wheel, is provided in the region of the bottom terminal deflection of the conveyor belt or rather at the lower extremity of the conveyor framework, which is dipped into the bulk material and transfers the bulk material received to the conveyor belt circulating in conventional manner between two extreme drums, under initial tension. The reception implement and the transfer system needed for the purpose, represent a great structural complexity.
The invention is based on the task of specifying a method according to the nature defined, and a corresponding device for the unloading of bulk material with which it is possible to secure an appreciable reduction of the structural complexity of the unloading device.
In accordance with the invention, this problem is resolved by the following method and device.
The conveyor belt itself acts as a reception implement in the method according to the invention and the corresponding device. The conveyor belt, or rather the conveyor framework comprising the conveyor belt, are lowered so far that the conveyor belt is dipped into the bulk material in the area of the free loop and picks up the same with its scoop-like entraining bars or cleats angled over in the direction of displacement, to convey the said material upwards out of the container in the conveying section or leg, without another transfer. A great structural simplification is accomplished thanks to the omission of a special reception means and of a corresponding transfer system, which is the greater, since it does not have to be secured at the cost of particular complexity regarding the guiding of the conveyor belt in the area of its bottom terminal deflection. On the contrary, the conveyor belt extends thereat in extremely uncomplicated manner in a freely formed loop. It was discovered in surprising manner that allowing the conveyor belt to run in this unconfined loop and thus necessarily also without particular pretensioning, does not in any way deleteriously affect the operational behaviour of the conveyor belt, in particular its rectilinear running. Care should merely be applied to ensure that the driving drum enflanked by the conveyor belt is positioned at such adequate height for the same that the intrinsic weight of the conveyor belt below the driving drum results in a sufficiently great frictional interlock on the driving drum for driving the conveyor belt. Apart from the great structural simplification, allowing the conveyor belt to run in the free loop also has considerable advantages for the operation upon reception of the bulk material: the conveyor belt can work itself into the bulk material without external constraint and under practically automatic adaptation to the slop of said material. Possible obstacles within the bulk material, e.g. lumps of particularly great weight or container components projecting into the same, may be avoided automatically by the conveyor belt. A particularly great protection for the self-scooping conveyor belt, but also of the bulk material itself, is assured thereby. The propensity of the belt to "mould" itself to the bottom moreover results in a particularly neat clearing of the container down to the bottom on which the conveyor belt practically sweeps up the bulk material with its entraining cleats, that is to say also in areas in which the bottom is curved or uneven. The consequence is a totality of the clearing of the container even in recesses and distant corners not accomplished with existing reception means.
The conveyor belt will preferably be lowered or allowed to dip into the bulk material and the loop is so deformed by the counterthrust of the bu
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Conrad Scholtz AG
Werner Frank E.
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