DE674011C - Device for cleaning and sorting with rocker screens through which an air stream flows from bottom to top - Google Patents

Description

Device for cleaning and sorting with from bottom to top of vibrating sieves through which an air stream flows. The invention relates to a Device for cleaning and sorting grain with in one bottom-up vibrating sieves arranged above one another through a housing through which an air flow flows, are inclined alternately in different directions and are adjustable in their inclination are. The vibrating screens, which have increasing mesh sizes, are transverse to the direction of movement of the grain moved back and forth.

The invention consists in that in the housing on both sides of the vertical center plane oppositely inclined sieve sets with superimposed, arranged alternately in different directions inclined sieves and the sieves are pivotably mounted with their inner end in frames with locking slots are provided for the free ends of the sieves.

Furthermore, according to the invention, there is a special feed device for each set of sieves intended.

When cleaning and sorting grain by means of an air stream It is important to have sifted out goods that make their way through a sieve set or a sieve has only partially moved back to withdraw from the further sieving process. So far this has happened because that of the seven or those below them Material falling off the guide surfaces is collected in vibrating chutes and through these chutes is discharged from the machine. This measure requires passage openings in the housing wall, through which outside air can penetrate the housing, which the Effect of the suction air flow acting on the material is reduced.

The arrangement of the sieve sets within the meaning of the invention achieves that this is achieved by two sieve sets lying opposite one another at the same height falling goods into a common central shaft through which the air flow flows and the material falling from the lower end of the sieves is directed into outer shafts can be.

This creates the arrangement of collecting channels through the housing wall must be led to the outside, avoided. .

The extension of the shaft arranged between the two sets of sieves up to the level of the two feed devices for the sieve sets enables the suction line to be connected to the top of the shaft. From the shaft the suction effect extends to the goods to be cleaned and sorted evenly on both sieve. Sentences.

Since each sieve is set in a certain inclination position can be and each sieve set has a special feed device, can Set the sieves of the sieve sets in different inclined positions so that one Sieve set for pre-cleaning and the other sieve set with the less steep ones Sieving can be used for subsequent cleaning of the goods. But it is also possible to give the same incline to the seven of the two sets of sieves, so that the device can only be used for pre-cleaning or only for post-cleaning. You need So no longer two devices, one for pre-cleaning and one for Post-cleaning.

There are cleaning and sorting devices with superimposed, screens inclined alternately in opposite directions, driven by a stream of air are flowed through, known. However, these devices have either stationary, sieves that do not vibrate and are therefore only trickling devices, or the devices do not have sets of sieves separated by a central air duct. In addition, the sieves of this device cannot be adjusted in the inclined position.

In the drawing, two embodiments of the device are shown the invention shown in vertical section. Fig. I shows the one embodiment, with the upper sieves of the two sets of sieves to the outside and the lower sieves to the outside are inclined inside, while in the embodiment according to Fig. 2, the top two The sieves are inclined inwards and the two lower sieves are inclined outwards.

Fig.3 shows a cross section of the device, while Fig. ¢ shows a section along the line A-B of Fig. i.

In the embodiment according to FIG. I, two are on a frame i Locking slots 9 provided arms 3, q. provided in which the sieves 12, 13, 29, which can be pivoted about horizontal axes 15 of the frame i, by means of clamping screws i i can be adjusted to any inclination. The sieves are opposite to each other inclined so that the two upper sieves 12, 13 form an angle that is open at the bottom, however, the two lower sieves form an angle with one another that is open at the top. The upper sieves 12, 13 are therefore also inclined in the opposite direction, as the sieves 3o, 29 lying vertically below them. The sieves 13 and 29 together form a sieve set and the sieves 12 and 3o another sieve set. Both sets of screens are separated from one another by an air shaft 17, the vertical center plane thereof with the central plane of the device coincides. The air shaft 17 is upwards extended up to the height of the feed device 21 and separates it into two compartments .. A suction line is connected to the upper end of the air shaft.

The sieve sets are hermetically sealed, with windows i 9 provided housing 2o enclosed. At the bottom of this case are collecting funnels and collecting channels for the baffles from the sieves and the baffles below the sieves sloping well arranged.

In the embodiment according to Fig.2 there are four support arms on a frame 2 5, 6, 7 and 8 with locking slots for the outer ends of around axes 16 of the frame pivoting screens 14th provided. The sieves form two sets of sieves, by an air shaft extended to the feed device 22 from each other are separated.

The frame carrying the sieves i or 2 of both devices is through an eccentric 27, 28 (Fig. 3) set in a reciprocating shaking movement.

The device shown in Fig. I works as follows: From the compartments the feed device 21 falls on the grain to be cleaned and sorted the downwardly inclined upper screens 12, 13 of the screen sets, under which a baffle is arranged for the goods falling through the meshes of the sieves. From the baffle falls, as indicated by the arrow 23, on the lower sieve 3o or 29 of the sieve sets. The material that does not fall through the sieve 13 enters a channel 25 and is withdrawn from the further sieving process. Under the sieve 29 is a fine-meshed one Sieve arranged. The good grain falls through the sieves 29 while through Weed seeds and sand fall through the fine-mesh sieve underneath these sieves and enter the funnels 32. The goods held back by the sieves 29, 3o fall from the lower end of the sieves into the shaft 17, while that of the under the sieves 29, 3o lying fine-meshed sieves at their lower end falling goods, the good completely cleaned grains, arranged in on both sides of the shaft 17 Shafts 31 arrive.

In the device according to Fig. 2, for the upper sieve of which no collecting channel is provided, the material falling at the end of the upper sieve falls into the middle air shaft, while the material falling through the mesh of the upper sieve falls through guide surfaces onto the upper end of the lower sieve falls. The material falling through the mesh of these sieves goes into shafts 33 and the goods falling from the lower end of the sieves into shafts 3q sieves of other sieve set, and the grain is first supplied to the Speisevorrichtunü ', which belongs to the set of sieves, whose screens are set less steep.

Claims (1)

CLAIMS: i. Device for cleaning and sorting grain with arranged in a housing through which an air flow flows from bottom to top, superimposed, alternately inclined in different directions, in their Inclination adjustable vibrating sieves moved transversely to the movement of the grain with increasing mesh size and underlying guide surfaces, characterized in that that in the housing on both sides of the vertical center plane opposite inclined sets of sieves with superimposed, alternating in different directions inclined sieves arranged and the sieves with their inner end pivotable in frame are stored, which are provided with locking slots for the sieves. z. contraption according to claim i, characterized in that a special feed device for each set of sieves is provided.