Crossflow impact device

Abstract

A beating device (1) for inactivating insects in a pourable feedstuff or foodstuff, with a housing (2), which has at least one inlet opening (3) and at least one outlet opening (4) for the material to be treated. A drum (6) is arranged in the housing (2) and rotatably about an axis of rotation (5). A plurality of blade elements (9) of a first type extend approximately parallel to the axis of rotation (5) and have a beating surface (10) arranged between two end parts (7, 8) of the drum (8). The drum is partially (8) circumferentially surrounded by a wall (11) of the housing (2) and the at least one inlet opening (3) and the at least one outlet opening (4) are formed in the wall (11).

Claims

1. An impact device for inactivation of insects in a pourable feedstuff or foodstuff product without significantly altering a grain size distribution of the product, said impact device having a housing which comprises respectively at least one inlet opening and one outlet opening for the product to be treated, and a drum which is arranged in the housing so as to be rotatable about a rotational axis, wherein a plurality of first type blade elements, which extend approximately parallel to the rotational axis and have an impact surface, are arranged between two end parts of the drum, a plurality of second type blade elements, which extend approximately parallel to the rotational axis and have a blade face, are arranged between the end parts of the drum, the blade face of the second type blade elements is inclined between 15? and 75? with reference to the radius of the drum, and the drum is surrounded, in part, circumferentially by a wall of the housing, and the at least one inlet opening and the at least one outlet opening are both formed at spaced apart circumferential regions of the wall surrounding the drum.

2. The device as claimed in claim 1, wherein the at least one inlet opening and the at least one outlet opening are arranged offset to one another with reference to the rotational axis by more than 90? and less than 270?.

3. The device as claimed in claim 1, wherein the first type blade elements comprise a substantially flat impact surface with a width of between 5 mm and 25 mm and a substantially rectangular cross section.

4. The device as claimed in claim 1, wherein the impact surface of the first type blade elements is inclined between 0? and 45? with reference to a radius of the drum.

5. The device as claimed in claim 1, wherein the first type blade elements are arranged radially at substantially identical spacings with reference to the rotational axis.

6. The device as claimed in claim 1, wherein adjacent first type blade elements are arranged at substantially identical spacings from one another.

7. The device as claimed in claim 1, wherein the blade face of second type blade elements is substantially flat with a width of between 5 mm and 25 mm and the second type blade elements comprise an inclined face, and the blade face and the inclined face meet at an edge.

8. The device as claimed in claim 1, wherein the second type blade elements are arranged radially at substantially identical spacings with reference to the rotational axis.

9. The device as claimed in claim 1, wherein the first type blade elements and the second type blade elements are arranged in each case alternately in a circumferential direction of the drum.

10. The device as claimed in claim 1, wherein the second type blade elements are situated radially outside the first type blade elements with reference to the rotational axis.

11. The device as claimed in claim 10, wherein in a region of the at least one of the at least one inlet opening and the at least one outlet opening the wall comprises at least one wiper element, a radial gap width, with reference to the rotational axis, between the at least one wiper element and the second type blade elements is between 0.5 mm and 5 mm.

12. A method for inactivation of insects in a pourable feedstuff or foodstuff product without significantly altering a grain size distribution of the product, wherein said method includes the following step: circumferential feeding of the product to be treated to a drum which rotates about a rotational axis and is provided with a plurality of first type blade elements, the plurality of first type blade elements extend approximately parallel to the rotational axis, have an impact surface and are arranged between two end parts of the drum, and further providing the drum with a plurality of second type blade elements, which extend approximately parallel to the rotational axis, have a blade face and are arranged between the end parts of the drum, and the blade face of the second type blade elements is inclined between 15 and 75 with reference to the radius of the drum, said circumferential feeding being in a substantially radial direction with respect to the rotational axis of the drum; and circumferentially removing the product, treated by the drum, at a circumferential location which is spaced from the circumferential feeding of the product to be treated.

13. An impact device for inactivation of insects in a pourable feedstuff or foodstuff product, said impact device having a housing which comprises respectively at least one inlet opening and one outlet opening for the product to be treated, and a drum which is arranged in the housing so as to be rotatable about a rotational axis, wherein a plurality of first type blade elements, which extend approximately parallel to the rotational axis and have an impact surface, are arranged between two end parts of the drum, and the drum is surrounded in part circumferentially by a wall of the housing and the at least one net opening and the at least one outlet opening are realized in the wall; a plurality of second type blade elements, which extend approximately parallel to the rotational axis, are arranged between the end parts of the drum; and the blade face of the second type blade elements is inclined between 15? and 75? with reference to a radius of the drum.

Description

(1) The invention is explained better below by way of a preferred exemplary embodiment in conjunction with the drawings, in which:

(2) FIG. 1 shows a sectional view in perspective of a preferred embodiment of the invention with a flange-mounted motor;

(3) FIG. 2 shows a cross section through a drum of a second preferred embodiment of the device;

(4) FIG. 3 shows a side view of the drum of FIG. 2;

(5) FIG. 4 shows a view of a detail of the blade elements;

(6) FIG. 5 snows a cross section through the drum and the housing of at second embodiment of the device according to the invention;

(7) FIG. 6 shows a side view of a third embodiment of the device according to the invention with a flange-mounted motor, a sectional view of the device being shown.

(8) FIG. 1 shows a device 1 which consists substantially of a housing 2 and a drum 6.

(9) The housing 2 can be realized with one or multiple parts depending on the intended application.

(10) For feeding and removing the product to be treated, the housing 2 comprises an inlet opening 3 and an outlet opening 4 which are shown schematically in each case by an arrow and extend substantially over the entire axial length of the drum 6.

(11) In a preferred manner, the inlet opening 3 and the outlet opening 4 each comprise a substantially constant width over the entire axial length of the drum 6.

(12) The drum 6 consists of two end parts 7 and 8, of which only the end part 7 can be seen in its entirety.

(13) A plurality of blade elements 9 and 12 extend between the end parts 7 and 8, i.e. in the longitudinal direction of the arum 6, substantially parallel to a rotational axis 3 of the drum 6.

(14) Said blade elements can be seen better in FIGS. 2, 4 and 5.

(15) There are two types of blade elements, namely first type blade elements 3 and second type blade elements 12, only some of which are provided with references for the sake of simplicity.

(16) The first type blade elements 9 each comprise a substantially flat impact surface 10, are distributed regularly in each case about the circumference of the arum 6 and form a first blade region.

(17) The second type blade elements 12 each comprise a substantially flat blade surface 13, are distributed regularly in each ease about the circumference of the drum 6 and form a second blade region. The second type blade elements 12 each also comprise a flat or arcuate inclined face 15, the blade face 13 and the inclined face 15 meeting at a razor-sharp edge which points in the direction of rotation of the drum.

(18) First type blade elements 9 and second type blade elements 12 are arranged in each case in a concentric manner with the rotational axis 5 as the center, the second type blade elements 12, when viewed radially, being situated outside the first type blade elements 9.

(19) The first type blade elements 9 comprise a substantially rectangular cross section, the widest face transversely to the longitudinal direction of the first type blade elements 9 realizing the impact surface 10.

(20) The second type blade elements 12 comprise a substantially orthogonally trapezoidal cross section, the widest of the faces (surface areas) parallel to one another of the second type blade element 12 realizing the impact surface 13.

(21) The face 14, which is perpendicular to the two surface areas of the second type blade element 12, points toward the rotational axis 5 of the drum 6, that is to say, when looked at radially, is at a smaller distance from the rotational axis 5 than the other face 15 which is not perpendicular (that is to say is inclined) to the two surface areas of the second type blade elements 12.

(22) The angular distance ? between a plane that is defined by the impact surface 9 and a radius of the drum 6 which runs through the center of gravity of the first type blade element 9, is approximately between 0? and 10?.

(23) The angular distance ? between a plane that is defined by the blade surface 13 and a radius of the drum 6 which extends substantially normally to the inclined face 15 of the second type blade element 12, is approximately between 40? and 60?.

(24) The first type blade elements 9 and the second type blade elements 12 are arranged in such a manner that the impact surface 9 and blade surface 13 are each facing the rotational axis.

(25) The number of first type blade elements 9 corresponds to the number of second type blade elements 12. In this case, there are in each case 27 first or second type blade elements with a diameter of the drum of 500 mm.

(26) The drum 6, as can be seen from FIG. 5, is substantially surrounded in a circumferential manner by a wall 11 of a housing 2.

(27) In a preferred manner, the gap width 16 between the wall 11 and the outermost dimension of the end part 7 is between 1 mm and 10 mm.

(28) In a preferred manner, the smallest radial distance 17 between the wall 11 and the inclined face 15 is between 10 mm and 15 mm.

(29) A wiper element 18, which, in a preferred manner, extends along the entire axial length of the drum 6, is arranged in the region of the inlet opening 3.

(30) The wiper element 18 is preferably arranged in such a manner that the radial gap width between the wiper element 16 and the second type blade element 12 is between 1 mm and 3 mm.

(31) A wiper element 19, which, in a preferred manner, extends along the entire axial length of the drum 6, is also arranged in the region of the outlet opening 4.

(32) The wiper element 19 is also preferably arranged in such a manner that the radial gap width between the wiper element 19 and the second type blade element is between 1 mm and 3 mm.

(33) In a preferred, manner, the inlet opening 3 is arranged in such a manner that the angular distance ?, which cuts out the arc portion of the wall 11 which exposes the inlet opening 3, is between 35? and 50?.

(34) In a preferred manner, the outlet opening 4 is arranged in such a manner that the angular distance ?, which cuts out the arc portion of the wall 11 which exposes the outlet, opening 4, is between 40? and 55?.

(35) The inlet opening 3 and the outlet opening 4 are arranged, in this case, with respect to one another in such a manner that the angular distance ? is between 155? and 170?.

(36) Consequently, the product is moved through the device 1 in a substantially deflection-free manner.

(37) A particular embodiment of the device 1 can be seen from FIG. 6. The drum 6 is flange-mounted on a motor 20 by means of a hub arrangement 21 which is designated schematically by the reference 21.

(38) It can be seen from FIGS. 1 and 6 that the drum 6 is mounted in an overhung manner only on the end part 8 that is arranged on the motor side.

(39) However, it can be provided, depending on the axial length and/or diameter of the drum 6, that a bearing arrangement is also effected on the end part 7 which is not arranged on the motor side.

(40) A shaft or axis, which extends over the entire axial length of the arum 6, can also be used for the bearing arrangement of the end part 1.

(41) Reinforcing elements 22, which are realized as circular ring-shaped disks and are connected to the first type blade elements 9 and to the second type blade elements 12, are additionally provided.

(42) The reinforcing elements 22 increase the stability of the drum 6, reduce the vibrations generated during operation and prevent the blade elements 9 and 12 from, bending and, as a result, the diameter of the drum 6 from widening in a radial manner on account of centrifugal forces.