Conveyors – chutes – skids – guides – and ways – Chutes – Vertical pipe
Patent
1990-03-15
1993-03-02
Olszewski, Robert P.
Conveyors, chutes, skids, guides, and ways
Chutes
Vertical pipe
193 25E, B65G 1114
Patent
active
051901323
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a device for loading a silo vehicle or similar with pourable bulk material.
Loading devices of this type are used for the dustfree vertical filling of bulk materials in powder or grit form such as cement, lime, gypsum, finishing plaster, basalt, granules and similar, at times extremely abrasive, bulk materials into silo vehicles, railway
In order to load a silo vehicle using such a loading device, the same is moved downwards so far that the set-down cone of the loading device sits on the dome of the silo vehicle. The close contact between the set-down cone and the dome of the silo vehicle makes possible a perfect dust seal during the loading process.
The dust/air mixture, which is displaced in the silo vehicle by the filling with solid matter, is extracted by means of the offtake channel provided in the loading device.
PRIOR ART
A first type of loading device has an internal tube which forms the actual loading tube and is concentrically surrounded by an external tube Both tubes can be contracted or extended in the manner of a concertina. The area between the internal tube and the external tube serves for the offtake of the dust/air mixture which is displaced during the loading process from the container to be filled The lower end of this twin-tube loading device can, when not in use, be closed by means of a closing part which can be applied to the underside of the loading device from below so as to be dustproof. By means of lifting the closing part, which is applied to the underside, to a greater or lesser extent, the closing part and thus also the two twin tubes can be lifted upwards to the corresponding extent. By means of lowering of the closing part, on the other hand, the twin tubes pull apart so that the external tube can be set down in a dustproof manner on the dome of a silo vehicle or similar.
The lifting and lowering of the closing part is carried out by means of a rope system which is arranged between the external tube and the internal tube. The rope system is thus not on the inside of the internal tube and therefore not in the bulk material flow. The influx of the bulk material can consequently not be affected which is very advantageous in terms of loading capacity. A major disadvantage of this loading device, however, is the presence of the internal tube, as this, in particular with very abrasive bulk materials, is exposed to heavy wear. Experience has shown that the internal tube has to be replaced disproportionately frequently, which not only leads to costs arising directly in connection with the replacement of this internal tube but additionally also leads to disruptions of the loading operation. Twin-tube loaders have therefore not gained acceptance on the market in those cases in which different bulk materials with varying abrasiveness are to be expected
A loading device is known from EP-A-73,349 in which the "loading tube" consists of several wear-resistant funnels which are distributed over the height of fall and in each case taper downwards in the longitudinal direction of the chute. The known funnels have the shape of a hollow truncated cone with circular basal surface areas. The respective upper funnel sits with its lower end to a greater or lesser extent inside the upper area of the respective lower funnel, as a result of which the construction height of the loading device differs. In order that the loading capacity be as great as possible, the internal diameter of the funnels is selected so as to be as large as possible. As, moreover, the inclination of the lateral walls of each funnel must not be too steep, in order to avoid wedging of funnels inserted one inside another, in all the funnels on the market a funnel shape has emerged in which the respective upper opening edge has a larger diameter than the lower opening edge of the set-down cone which is to be closed by a closing part. This means that the pulling devices for the closing part can no longer be guided through in a straight line between the funnels and the concertina wall, whi
REFERENCES:
patent: 3428156 (1969-02-01), Charyn et al.
patent: 4225033 (1980-09-01), Fukagai et al.
patent: 4727913 (1988-03-01), Bliss
Stanelle Ambros
Stanelle Andric
Gastineau Cheryl L.
Olszewski Robert P.
Stanelle Karl-Heinz
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