Separating device

Abstract

A separating device is provided for separating a harvested mixture of root crops and admixtures. The separating device includes at least one conveyor element which circulates in operation at least for supplying the harvested mixture to a separation region, or for discharging the root crops from the separation region in a conveying direction. The separating device includes at least one fluid flow generator and at least one directing device for directing a fluid flow in a fluid flow direction to the separation region. The directing device is at least realized in at least one directing portion by the conveyor element itself.

Claims

1. A separating device for separating a harvested mixture of root crops and admixtures, the separating device comprising: at least one conveyor element for at least one of: supplying the harvested mixture to a separation region; and discharging the root crops from the separation region in a conveying direction; at least one fluid flow generator; and at least one directing device for directing a fluid flow in a fluid flow direction to the separation region; wherein: the directing device is realized in at least one directing portion by the conveyor element itself; the conveyor element is realized as a substantially fluid-impermeable conveyor belt; and the directing portion is realized by a conveyor side of the conveyor belt, and by a portion of the conveyor side which forms an upper boundary to delimits the fluid flow upward in a vertical direction.

2. The separating device according to claim 1, wherein the directing portion extends to the separation region.

3. The separating device according to claim 1, wherein the conveyor belt is realized as a slat conveyor with a plurality of conveyor belt slats which abut against one another in the conveying direction.

4. The separating device according to claim 1, wherein the directing portion has a length of at least 20 cm in the fluid flow direction.

5. The separating device according to claim 1, wherein the directing portion has a width orthogonal to the fluid flow direction of at least 80% of the width of the conveyor element.

6. The separating device according to claim 1, wherein the directing portion comprises at least in part a gradient of no more than 60° relative to a horizontal.

7. The separating device according to claim 1, further including at least one wiper lip which is stationary relative to the fluid flow generator, and which is arranged in a sealing manner on the conveyor element and preferably delimits the directing portion in the fluid flow direction.

8. The separating device according to claim 1, further including at least one sealing lip which seals the directing portion toward a further part of the directing device and is arranged in a stationary manner relative to the fluid flow generator and in a sealing manner on the conveyor element.

9. The separating device according to claim 1, further including at least one guide element which guides a conveyor belt portion which also realizes the directing portion.

10. The separating device according to claim 9, wherein at least one of multiple guide elements is realized as a pressing roller which is arranged at least on the side of the conveyor belt portion remote from the fluid flow.

11. The separating device according to claim 9, wherein at least one of the multiple guide elements is realized as a position roller which is arranged at least on the side of the conveyor belt portion facing the fluid flow.

12. The separating device according to claim 9, wherein at least one of the multiple guide elements is realized as a sliding element which abuts at least against the side of the conveyor belt portion facing the fluid flow and extends in the fluid flow direction.

13. A machine for harvesting or overloading root crops, comprising a receiving device and a separating device according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further details and advantages of the invention can be found in the exemplary embodiments which are described below and are shown in a schematic manner. The Figures are as follows:

(2) FIG. 1 shows schematic representation of a longitudinal section of a separating device according to the invention.

(3) FIG. 2 shows a partly shown longitudinal section of a separating device according to the invention from an opposite perspective.

(4) FIG. 3 shows an overview of the partly shown separating device according to FIG. 2.

(5) FIG. 4 shows a completely shown longitudinal section of a separating device according to the invention.

(6) FIG. 5 shows a longitudinal section of part of a machine according to the invention with a separating device according to the invention.

(7) FIG. 6 shows an overview of the machine according to the invention according to FIG. 5.

(8) FIG. 7 shows an overview of an alternative machine according to the invention.

DETAILED DESCRIPTION

(9) The features explained below of the exemplary embodiments according to the invention can also be an object of the invention individually or in combinations other than those shown or described, always, however, at least in combination with the features of claim 1 or of claim 15. Insofar as is sensible, parts which produce the same effect functionally are provided with identical reference symbols.

(10) FIG. 1 shows a separating device 2 according to the invention for separating a harvested mixture 4 of roots crops 6 and admixtures 8. The conveying device 2 comprises a conveyor element 10 which is realized as a conveyor belt and supplies the harvested mixture 4 to a separation region 12. The harvested mixture 4, in this case, is moved in a conveying direction 14. In the separation region 12, the harvested mixture 4 drops down a drop step onto a riddle grid 48. In the separation region 12, in this case, a fluid flow, which flows in the fluid flow direction 22, acts on the harvested mixture 4.

(11) The fluid flow is generated by a fluid flow generator 16 and is directed by a directing device 18 to the separation region 12. The directing device 18 is realized in a level directing portion 24 by the conveyor element 10 itself. The directing portion 24 is delimited, on the one hand, by a sealing lip 32 and is delimited, on the other hand, by a wiper lip 30. In the region of the directing portion 24, the conveyor element 10, which is realized as a conveyor belt, is guided by position rollers 40, which abut on the fluid flow side against the conveyor element 10, and pressing rollers 38 which abut on the opposite side of the conveyor element 10.

(12) A first hedgehog web 50, by means of which the harvested mixture 4 is applied onto the conveyor element 10, from which it is forwarded in the conveying direction 14, is situated upstream of the conveying device 2. After passing the riddle grid 48, which comprises recesses through which part of the fluid flow flows in operation, the root crops 6 pass onto a further hedgehog web 50 which removes them from the separating device 2.

(13) FIG. 2, which shows a longitudinal section of the conveying device 2 only in part, also shows further guide elements 36 with sliding elements 42 which extend along the direction portion 24 in the fluid flow direction 22. These serve for guiding and positioning the conveyor belt portion 34 transversely to the fluid flow direction 22 (cf. FIG. 3), which realizes the directing portion 24. The directing portion 24 extends up to the separation region 12 and is separated therefrom solely by a wiper lip 30. FIG. 2 and FIG. 3 show that the directing portion 24 is realized by an outwardly directed conveyor side 56 of the fluid-impermeable conveyor belt, on which the harvested mixture 4 also rests in an upper region in operation. In a second region, the level directing portion 24 is realized by the conveyor side 56 and the fluid flow is delimited upward. The drive element 58 follows the conveyor belt portion 34 in the circulating direction of the conveyor belt 34.

(14) FIG. 3 shows that the conveyor belt portion 34 rests on the sliding elements 42 over the entire length. The width of the directing portion 24, which is measured from one sliding element to the other sliding element, corresponds approximately to the overall width of the conveyor belt. The directing portion 24 is level and has a gradient of less than 60° relative to a horizontal.

(15) Not shown in FIG. 2 and FIG. 3 are lateral side parts of the directing device 18 which are arranged in each case before and after the plane shown. Components, by means of which the potatoes 6 and the admixtures 8 are conveyed in and after the separation region 12 are not shown either FIG. 4 shows a longitudinal section of a conveying device 2, a stone removal device 54 also being shown. In particular stones which leave the separation region 12 and in particular the riddle grid 48 in a direction substantially opposite to the conveying direction 14, are removed transversely to the image plane by said stone removal device. A baffle plate is arranged between the riddle grid 48 and the stone removal device 54. As a result of the fluid flow and of a high-frequency movement of the riddle grid 48, the root crops 6 receive movement pulses, by means of which they move toward the hedgehog web 50 following in the conveying direction. On account of the greater density in particular of stones, they do not overcome the slight gradient of the riddle grid 48 and pass separating elements 52, which are indicated in FIG. 5, in an opposite direction. As a result of passing the separating elements 52, the stones move onto the fluid-impermeable baffle plate which directs them to the stone removal device 54.

(16) FIG. 5 shows in a partly sectioned representation the rear part of a machine 44 according to the invention for harvesting root crops 6, in which the conveying device 2 according to the invention is arranged. As a result of the realization according to the invention, the installation height of the separating device can be reduced in the tightly occupied part of the machine. FIG. 6 shows the same machine 44 to be towed in an overall representation with a receiving device 46. FIG. 7 shows an alternative embodiment of the machine 44 according to the invention with a receiving device 46, once again, the conveying device 2 being arranged in the rear region of the harvesting machine 44. In said embodiment, the conveying element 10 conveys the harvested mixture 4 in a conveying direction 14 which is arranged at right angles to a further conveying direction of a further conveying element. The conveying direction 14, in this case, is arranged parallel to the driving direction of the harvesting machine. The further conveying element, to which the root crops 6 move after overcoming a drop step between the conveyor elements 10, is part of a cross elevator 60 which transports the root crops 6 transversely to the driving direction.