Conveyors: fluid current – Having means to introduce booster fluid into conveyor – Plural booster inputs
Patent
1985-01-10
1986-06-17
Nase, Jeffrey V.
Conveyors: fluid current
Having means to introduce booster fluid into conveyor
Plural booster inputs
138 42, 138 44, 138111, 138115, 406191, B65G 5352
Patent
active
045953171
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for pneumatic or hydraulic feeding of dust-like, powdery or granular bulk goods, consisting of a feed line with an inner pipe mounted therein extending concentrically thereto being provided with outlet and inlet openings.
In accordance with DT-PS No. 1 174 256 it is known to feed dustlike or granulated bulk goods in a pipe, wherein the main flow in longitudinal direction of the flow is partially branched off in short distance spaced successive locations and that the partial flow which flows separately from the main flow, due to the branching off, is again fed back into the main flow shortly before the next branch location when seen in flow direction. For this purpose, a device with a feed line and parallel branch lines had been suggested which both discharge into the feed line, whereby a plurality of such short branch lines are provided in longitudinal direction adjacent to this pipeline. They may also be mounted within the feed line. It is assumed that the bulk goods is to be fed in form of so-called plugs of goods. This is possible with the known device as long as finely granulated bulk goods is fed. With bulk goods which tend to form a slight wall deposit or where the particles have a diameter of a few millimeters the danger of blockage of the narrow branch lines exists, so that they become ineffective. In accordance with a recent development DT-PS No. 15 068 848 a continuous branch line is provided adjacent the main feeding line, instead of a plurality of short branch lines, which is provided with inlet and outlet openings which are disposed at a distance with respect to each other. A shut off of the branch line is provided between these equally large inlet and outlet openings, so that the total feed medium of the branch line is fed at those distances into the main line and again out of there and back into the branch line. Such a design is less expensive than the design of a plurality of independent branch lines adjacent to the main feed line. However, this device is merely suitable to divide a plug of goods for a further feeding when it becomes stuck in the feed line, because when the feeding of the material runs normally the largest part of the feeding air flows into the main feed line because it does not have any cause to flow through the branch line or channel, since the same has a substantially higher flow resistance. The feeding air gets into the branch channel only when the feeding stops in the main feed line, for example, when a plug of goods is stuck, so that the air can and must exit the channel at the location where the plug of goods is stuck. The same is accomplished with a further known device (DT-PS No. 2 102 301), wherein the branch line is not completely blocked at the locations at which one each outlet and inlet openings are disposed. In accordance with this patent it is known to provide a first baffle plate on the bottom directed obliquely against the feeding flow extending into the branch channel and to provide a second baffle plate successively to the first one in the same direction for forming a reentry opening. With this design it should also be possible to obtain a dividing of a plug of goods by introducing feeding air from the branch channel when the plug of goods is stuck in the feed line. However, an essential disadvantage of this design is to be seen in that the flow in the branch line is deflected by the baffle plates to the upper side of the branch line, thus causing a wear thereon caused by the turbulences, whereby it should be taken into consideration that high speed of the feeding air is generated in the branch line and the air is filled with granulated material. Consequently, repairs which are resulting therefrom are rather expensive. A further disadvantage is to be seen in that the baffle plates which extend into the branch lines cannot be changed in their positions or only with a great effort once they are installed, which however should be made possible for feeding different types of material. Generally, it should be noted with respe
REFERENCES:
patent: 3240531 (1966-03-01), Lippert et al.
patent: 3524478 (1970-08-01), Rapp et al.
patent: 3626986 (1971-12-01), Rapp et al.
patent: 3759578 (1973-09-01), Muschelknautz et al.
Moller Hermann
Muschelknautz Edgar
Pust Jurgen
Johannes Moeller Hamburg GmbH & Co. KG
Nase Jeffrey V.
Striker Michael J.
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