Material or article handling – Static receptacle and means for charging or discharging – or... – Charging or charge-distributing means
Patent
1983-10-19
1985-11-26
Sheridan, Robert G.
Material or article handling
Static receptacle and means for charging or discharging, or...
Charging or charge-distributing means
239687, A01F 2518
Patent
active
045552100
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a spreader device in a silo compartment type storage container for uniform filling of the container with granular storage goods.
Conventionally, a silo compartment is filled with the aid of a fill spout, so-called chute, opening into the upper end of the silo compartment. The chute introduces the storage goods, such as grain or the like, into the silo compartment such that the storage goods impinge in the form of a jet against the surface layer of the storage goods already present in the silo compartment, whereby there arises a disadvantageous separation of the storage goods into fractions of different size particles, the fine particles remaining near the point of impact, while the coarse particles move in a secondary movement radially outwardly from said impact point, and whereby the heterogeneous compaction in the silo compartment is obtained, implying that the highest value of the compaction prevails below the impact point.
The object of the invention is to overcome the disadvantages outlined above to provide such a container filling technique as results in a more uniform particle size distribution over optional container cross-sectional areas and a more uniform grain compaction degree vertically of the container than the above-described prior art filling technique.
This object is realized according to the present invention by means of a spreader device which is characterised by a generally conical body which is suspended for rotation about its longitudinal axis in the container directly below the outlet of the material supply conduit of the container and the upper narrow end of which faces the mouth of the fill spout and forms the bottom of a number of upwardly open channels which are distributed over the outer side of said body in the peripheral direction thereof and open at the lower end of said body, each of said channels being associated with a transverse blade fixed to the conical body radially outwardly of the lower end thereof, said blades taking different degrees of inclination to the longitudinal axis of the conical body.
The granular stream exiting from the fill spout is thus divided by the spreader device according to the invention, more specifically by the upwardly open channels thereof, into several part streams which slide downwardly in said channels and are thrown against the transverse blades at the same time as said part streams are actuated by centrifugal force generated either by the device being rotated with the aid of a motor or by the channels being provided with some element deviating from the direction of the generatrix of the body. The variant including the motor is preferably utilised if the silo compartment has so large a cross-sectional area that the available kinetic energy of the stream of kernels of grain does not suffice to throw the kernels all the way to the compartment wall. Every divided stream of kernels bounces against the associated transverse blade and due to the rotation of the body it swoops down in a predetermined annular area of the surface of the material already present in the compartment, the different inclinations of the blades providing concentric annular areas on said surface.
By splitting up the filling stream in this manner into a shower of kernels of almost constant intensity over the cross-sectional area of the container, one gains increased homogeneity, uniformly distributed pressure intensity against the container walls, increased storage capacity of the container due to the increased compaction degree, and moreover the need of subsequent compaction is eliminated because the maximum storage capacity of the container can be attained in a continuous filling operation. Further, an advantageous aeration of the material is obtained during the filling of the container.
The device according to the invention may preferably include a connection with a compressed air/vacuum source. Compressed air can be employed for instance to assist in moving the most light-weight kernels in each part stream up to the transverse blades, and vacuu
REFERENCES:
patent: 3488007 (1970-01-01), Neuenschwander
patent: 3490619 (1970-01-01), De Wittie
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