Means for conveying a mixture of products having different densi

Conveyors: fluid current – Fluid current conveyor outlet means – With material separating receptacle

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Details

B65G 5360

Patent

active

044576480

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention relates to a means for conveying a mixture of products having different density from one place to another via a transport pipe and with the help of compressed air. The mixture may contain particles of different sizes. It is desirable for the mixture to be as homogenous as possible and not divided into layers of different sizes. An example of such a mixture is fodder mixtures which may contain both largish particles and particles in the form of powdered grains. In the case of fodder it is important for the mixture to be as homogenous as possible since it is to be used for feeding animals and it is important for the animals to receive a correctly balanced mixture on which to feed. A fodder mix may be fully homogenous at the delivery point, transferred to a tank vehicle and then transported to a consumer who generally has a silo. The mixture is transferred to the silo from the tank via a transport pipe using compressed air. When the fodder mix is emptied into the silo, the homogeneity is generally lost, which is a disadvantage to the consumer. To prevent this happening the use of a cyclone has been suggested at the top of the silo to maintain the homogeneity. However, the cyclone has the drawback that its walls are worn relatively quickly by passing fodder.


SUMMARY OF THE INVENTION

The object of the present invention is to achieve retained homogeneity in the fodder mix when it is emptied into the silo, without the use of a cyclone. This is achieved by allowing the fodder mix to pass through a nozzle at the top of the silo, the nozzle being designed so that a sheath of compressed air is formed around the fodder mix flowing through the nozzle. The existence of this sheath ensures that the fodder mix being emptied into the silo retains its homogeneity.
Should it be necessary to transfer a homogenous fodder mix from a tank vehicle to an arbitrary storage place with retained homogeneity it is quite sufficient to use a casing of solid material which is closed at one end and is provided at this end with a nozzle of the type described so that a sheath of compressed air is obtained inside the casing while the fodder mix is being emptied.
When transferring the fodder mix from a tank vehicle to a silo it is advisable to work with an air pressure up to about 1 kg/cm.sup.2.
The density of the various particles in the fodder mix varies between 450 and 850 kg/m.sup.3.
A suitable transport volume per time unit when transferring a fodder mix from a tank vehicle to a silo is 1000 m.sup.3 /hour.
When transferring fodder mix approximately 10% of the volume should be fodder and 90% compressed air. If the mixture consists mainly of flour 40% of the volume should be mix and 60% compressed air.
Additional features of the present invention are revealed in the following detailed description.


BRIEF DESCRIPTION OF THE DRAWING

The single FIGURE of the drawing illustrates the apparatus of the invention in operative position within a silo.


DETAILED DESCRIPTION OF THE INVENTION

The FIGURE shows a transport pipe 1 for transferring homogenous fodder mix from a tank vehicle with the help of compressed air having a pressure up to 1 kg/cm.sup.2. The transport pipe opens into a nozzle 2, this being in the form of a housing comprising a cylindrical wall section 22 and a conical wall section 3. At the bottom 4 of the cylindrical section 22 are four ridgelike parts 5-8 arranged in such a manner as to form a cross. Throughflow openings 9 and 10 are arranged between two adjacent parts. The conical section 3 is provided with a number of openings 11 for compressed air. The nozzle 2 is located inside a silo 12 having a conically closed upper part 13, a cylindrical part 14 and a conical bottom part 15 with an outlet 16. The silo 12 stands on four legs 17-20.
The means described above functions as follows: It is assumed that the transport pipe 1 is connected in some way to a tank vehicle delivering a homogenous fodder mix with the help of compressed air, the volume being transferred from the tank

REFERENCES:
patent: 1087667 (1914-02-01), Kise
patent: 1184860 (1916-05-01), Lob
patent: 1213820 (1917-01-01), Bergman
patent: 2010231 (1935-08-01), Heist
patent: 3078127 (1963-02-01), Miller
patent: 3203044 (1965-08-01), Hardouin et al.
patent: 3217364 (1965-11-01), Genest
patent: 3229850 (1966-01-01), Gartner

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