DISCHARGE DEVICE FOR SHREDDED ORGANIC MATTER

Abstract

A discharge device (2) for shredded organic matter from a shredder (1), wherein the device comprises a rotatable shaft (3) on which a fan element (4) is provided which is configured to project the shredded matter in the direction of the discharge side, and displacement means (5; 6) which are configured to move at least part of the supplied matter in the direction of the fan element (4). The invention furthermore concerns a shredder (1) provided with such a discharge device (2).

Claims

1. Discharge device for shredded organic matter from a shredder, comprising a supply and a discharge side, a rotatable shaft on which a fan element is provided which is configured to project the shredded matter in the direction of the discharge side, wherein said rotatable shaft furthermore comprises displacement means which are configured to move at least part of the supplied matter in the direction of the fan element, wherein the fan element is positioned centrally on the rotatable shaft and the diameters of the fan element and of the displacement means are the same.

2. Discharge device according to claim 1, characterized in that the fan element and the displacement means rotate at the same speed.

3. Discharge device according to claim 1, characterized in that the displacement means comprise a first and a second displacement means, wherein the fan element is provided between the first and the second displacement means.

4. Discharge device according to claim 3, characterized in that the first and second displacement means are formed helical.

5. Discharge device according to claim 3, characterized in that the pitches of the first and second displacement means run opposite to each other.

6. Discharge device according claim 1, characterized in that the fan element comprises a first and second fan part, wherein each fan part comprises a plate-like element.

7. Discharge device according to claim 1, characterized in that the rotation speed of the shaft is at least 1000 rpm.

8. Discharge device according to claim, characterized in that the fan element is furthermore provided to generate a suction force on the supplied shredded matter.

9. Discharge device according to claim 1, characterized in that the device furthermore comprises a discharge tube along which the shredded matter can leave the device.

10. Shredder for comminuting organic matter, comprising a shredding chamber provided with rotatable cutting means for shredding the organic matter, wherein the discharge side of the shredding chamber is provided with a discharge device with a discharge side, comprising a rotatable shaft on which a fan element is provided which is adapted for projecting shredded matter in the direction of the discharge side, wherein said rotatable shaft furthermore comprises displacement means which are configured to move at least part of the supplied matter in the direction of the fan element, wherein the fan element is positioned centrally on the rotatable shaft, and wherein the diameters of the fan element and of the displacement means are the same.

11. Shredder according to claim 10, characterized in that the cutting means comprise at least two blade groups mounted next to each other on a shaft and installed rotatably in front of an anvil, wherein said blade groups each comprise a plurality of splitter blades which are intended to split the supplied organic matter mainly following the infeed direction of the matter.

12. Shredder according to claim 11, characterized in that the splitter blades within one blade group are mounted offset relative to the other on the shaft, so that the projections from their cutting faces onto the anvil do not coincide and cover the entire infeed width.

13. Shredder (1) according to claim 11, characterized in that the splitter blades of blade groups mounted adjacent to each other are placed twisted relative to each other so that these each act on the supplied organic matter at different moments.

14. Shredder according to claim 10, characterized in that the discharge device comprises a supply side and the discharge side and the rotatable shaft on which the fan element is provided, wherein the fan element and the displacement means rotate at the same speed.

Description

[0024] In this description, reference is made by means of reference numerals to the attached drawings in which:

[0025] FIG. 1 is a perspective depiction of the shredder according to the invention;

[0026] FIG. 2 shows the inside of the shredder shown in FIG. 1;

[0027] FIG. 3 is a depiction of a detail of a discharge device according to this invention provided at the discharge side of a shredding chamber;

[0028] FIG. 4 is a top view of a fan element positioned between a first and a second displacement means;

[0029] FIG. 5 shows, by means of a number of part FIGS. 5.1 to 5.6, the movement of a cutting through the discharge device according to the invention.

[0030] The shredder (1) according to this invention and as shown in FIGS. 1 to 3 comprises a shredding chamber (8) provided with rotatable cutting means (9) for shredding organic matter, and an infeed hopper (12) provided for introducing the organic matter into the shredding chamber (8).

[0031] The matter to be shredded is introduced via the infeed opening of the infeed hopper (12), the infeed hopper (12) is connected to the shredding chamber (8) where the supplied matter is then shredded by means of rotatable cutting means (9) into cuttings (14). As soon as the matter to be shredded comes into contact with the cutting means (9), the matter is automatically drawn in by rotation of the cutting means (9).

[0032] The cutting means (9), as shown on FIGS. 2 and 3, preferably comprise a rotor mounted transversely to the infeed direction and constructed from a shaft (11) on which at least two adjacent groups of blades are mounted on the periphery and installed rotatably in front of an anvil (10), wherein said blade groups comprise a plurality of fixed splitting blades which are intended to split the supplied matter mainly in the infeed direction of the matter. In a specific embodiment, the blade groups are furthermore provided with at least one chopping blade which is intended to shred the supplied organic matter mainly transversely to the infeed direction of the matter. The rotor rotates in a housing.

[0033] The discharge opening (side) of the shredder chamber (8) is provided with a calibration screen (grating) (13), via which the shredded matter is discharged. The calibration screen (13) ensures that the matter remains inside the shredding chamber so that it can be shredded further into smaller particles.

[0034] According to the shredder according to the invention, the cuttings (14) are driven through the screen by the cutting means and the created centrifugal force in the direction of a discharge device (2) placed after the cutting chamber (8).

[0035] The discharge device (2) according to this invention, as shown in FIGS. 4 and 5, comprises a rotatable shaft (3) on which a fan element (4) and first (5) and second (6) displacement means are provided. The fan element (4) sits centrally on the shaft concerned, between the first (5) and second (6) displacement means.

[0036] The fan element (4) is constructed in two pieces and comprises a first (4a) and second (4b) fan part which lie in the extension of each other. The first fan part (4a) is provided on one side of the rotatable shaft (3), while the other (second) fan part (4b) is provided on the other side of the rotatable shaft (3). Both fan parts (4a and 4b) stand transversely on the rotatable shaft (3). Each fan part (4a, 4b) is constructed from a flat plate-like element, the long edges of which are designed upright. As shown in FIGS. 4 and 5, the two fan parts (4a, 4b) are arranged opposite to each other. In this way, the long edges of the first fan part (4a) extend in the one direction (e.g. upward) while the long edges of the second fan part (4b) extend in the other direction (e.g. downward).

[0037] The first and second displacement means are designed helical. Here the pitches of the first (5) and second (6) displacement means run opposite to each other. This is clear from FIG. 4, where the thread pitch of the first displacement means (5) runs to the left and the thread pitch of the second displacement means (6) runs to the right. Due to their specific shaping, in use (when rotating), the first and second displacement means ensure that the shredded matter which lands thereon, or which lies against or in the vicinity of the casing wall of the discharge device (2), will be moved in the direction of the two fan parts (4a, 4b) of the fan element (4).

[0038] This movement of the shredded matter by the displacement means (5, 6) is clarified in FIGS. 5.1 to 5.6, in which we see a possible movement of a cutting (14) which lies in the discharge device (2) according to the invention, on the outside thereof. As the figures show, a cutting lying on the outside (14) (see FIG. 5.1) will, due to the rotation of the displacement means (5 and 6) (see FIGS. 5.2 to 5.5), be transported (moved) towards the centre where it will land on the surface of a fan part (4.1) (see FIG. 5.6). Once it comes into contact with the rotating fan part, it will be projected out of the discharge device (2). In use, the movement of the cuttings towards the fan element (4) is supported by the suction force generated by the fan element (4).

[0039] In use, the rotatable shaft (3) of the discharge device (2) will rotate at high speed, wherein the rotation speed is preferably at least 1500 rpm and more particularly at least 2000 rpm. Due to the high rotation speed of the rotatable shaft (3) and hence also of the fan element (4), the fan element (4) will firstly generate a suction force which will suck the shredded matter out of the shredding chamber of a shredder (1) and move it in the direction of the fan element, and secondly exert a projection force on the shredded matter which comes into contact with the fan element (4) in order to remove this from the discharge device (2).

[0040] The matter projected by the fan element (4) will leave the discharge device (2) (shredder) via a discharge tube (7). The inlet to the discharge tube (7) lies level with the fan element (4), whereby all the shredded matter coming from the fan element is discharged. The discharge tube is preferably rotatable so that the user can decide in which direction the shredded matter should be discharged. In principle, a catchment container is placed below the outlet from the discharge tube, in which the shredded matter can be captured.

[0041] To move the shredder (1) easily, this is provided with a number of wheels, preferably two or four.