CH643470A5 - MACHINE FOR CLEANING AND / OR SORTING Bulk goods. - Google Patents

Description

The invention relates to a machine in the. Preamble of claim 1 mentioned type.

Such a machine can be used for separating different bulk goods in the Chinese industry, in the food industry and in ore mining and is particularly suitable for cleaning and / or sorting grain and seeds in agriculture.

Such a machine ensures the required quality in several procedural processes when winning an intermediate or end product. Without such a machine, high quality seeds can hardly be obtained in agriculture, for example.

Several known types of such machines differ essentially from one another in the way the bulk goods are separated into fractions. Among the various types of such machines, for example, air sieve sorting machines are most widespread in agriculture, in which the bulk goods are separated under the influence of air and by means of sieves. Such machines are used in particular to clean the seeds of impurities and for sorting, in order to ensure a selection of the most germinable seeds. Therefore, the perfection of known designs of such machines and the development of substantially new machines is an important technical task.

Well-known machines for cleaning and / or sorting bulk goods have a frame,

on which one or two vertical air ducts with an aspiration chamber, an arrangement of flat sieves, a drive for setting the flat sieves in shaking movements 45 and devices for cleaning the sieves are arranged. In most cases, the required quality of the bulk goods can be achieved with such machines when cleaning and / or sorting, but the performance of such machines, based on the dimensions of such a machine, is relatively small; The reason for this is that the intensity of the separation process in such machines is essentially dependent on the effect of gravity, which is a certain size for the mixtures of bulk materials to be separated. In this connection 55 the acceleration of movement of the particles of the bulk goods during the sorting cannot exceed the size of 9.81 m / sec 2, as a result of which the intensity of the sighting is limited.

A machine of the type mentioned at the beginning, which is known, for example, from US Pat. No. 3,794,166 (US Pat. No. 60 209/301) and which is also intended for cleaning and / or sorting grain and seeds, has a housing in which a vertically standing, in the form of a rotating body sieve is movably arranged. The sieve is rotated by a drive and set in a vertical shaking motion. A cleaning device for the sieve, which is also designed as a rotating body, is arranged on one side of the sieve and is attached to its outer surface by springs.

presses. This known machine enables a substantial increase in productivity related to the mass of the machine due to the use of centrifugal forces acting on the particles of the bulk material, which accelerate the separation process.

The disadvantage of this known machine is that only a single sieve can be used, so that the respective bulk material can only be separated into two fractions. Since this machine also does not have a wind separation channel, there is also no possibility of cleaning and / or sorting out the bulk material depending on the weight size of the particles. In this context, it is also not possible to achieve the necessary intensity when cleaning the sieve holes, because firstly the cleaning device of the vertically arranged sieve is only on one side of the sieve and secondly after the sieve has been rotated by an angle equal to approximately n radians this is essentially blocked by particles of the bulk material to be separated, as a result of which the performance of such a viewing machine and the quality of the product decrease considerably.

When using the cleaning device having a smooth surface and intended for cleaning the screen holes in the relevant viewing machine of only one embodiment, a reduced effectiveness of the machine during operation must also be accepted, as long as a considerable proportion of the particles of the bulk material are cleaned by the cleaning device of a certain one Type cannot be pushed through the sieve holes. Such disadvantages severely restrict the use of such a sorting machine, for example in agriculture.

Another, known from SU copying certificate 506 439 (Kl.B. 07 B 1/44) has several identical air sieve separator sets rigidly attached to a frame, a drive for the working elements of these separator sets and Air separation chambers that are connected to the separation sets. Each separator set contains a housing in which a pneumoseparie-separating device and vertical runners arranged one behind the other are accommodated. A screen drum with a plurality of disks arranged in series as rotary bodies is movably attached to such a rotor. The sieve drum and the sieves themselves are made inseparable in that the sieves are rigidly attached to the sieve drum. On one side of the screening drum, screen cleaning devices designed as rotary bodies and having a bristle-like surface are arranged. The screen cleaning devices are hinged to the housing of the separation set and pressed onto the outer surface of the screens. The sieves are set in motion by a crank vibrator rigidly attached to the frame of the machine. At the same time, the sieve drum is rotated about a vertical axis and also vibrated with respect to this axis. The bulk material filled into the machine is first sorted by air to separate light particles and then by sieves into the required number of fractions. As a result of the centrifugal forces acting on the particles of the bulk material when the bulk material is separated by the rotating and oscillating sieves, this known machine has an increased performance with a high-quality mode of operation compared to comparable machines.

Although the known machine described above is characterized not only by its high performance but also by its versatility, for example by separating the bulk material into more than two fractions and sorting it out by particle weight,

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this machine also has significant disadvantages. Since the sieve drum is inseparably connected to the sieves and the sieves are rigidly attached to the sieve drum, the replacement of the sieves in the event of wear or when changing over to processing another bulk material is made considerably more difficult. Furthermore, the standardization of such machines is essentially restricted if it should be necessary to use sieve drums with a different number of sieves. Due to the use of a single embodiment of the screen cleaning devices, which for example have a bristle-like surface and are only arranged on one side of the screen drum, such a machine suffers from the same disadvantage as other known designs. Overall, the disadvantages mentioned have the consequence that the performance of such a machine is limited, that there are difficulties in using it and that there is a lack of standardization with regard to different services and purpose.

The main aim of the present invention is to increase the performance when separating the bulk goods and to standardize the machines of different performance and purpose.

The invention is therefore based on the object of creating a machine of the type mentioned at the beginning, the sieve drum, sieves and cleaning devices of which can be modified in such a way that the performance is significantly increased and operation is simplified.

The object is achieved according to the invention by the features specified in the characterizing part of claim 1.

With the design according to the invention, both the performance of the machine when separating the bulk material is significantly increased and a unification with regard to different performance and purpose is achieved.

A preferred embodiment according to claim 2 enables a simplified replacement of the sieve parts of the machine.

By an embodiment according to claim 3, a required sealing of the joints of the screen and at the same time an increase in the stiffening in the radial direction is achieved.

In an embodiment according to claim 4, a much more effective cleaning of the sieve holes from different particles of the bulk material to be separated can be achieved.

An embodiment according to claim 5 enables a substantial improvement in stability when pressing the cleaning device against the sieve and thus an increased effect when cleaning the sieve holes.

In connection with claim 6, a simplification of the damper structure and an extension of the operating time of the damper is made possible.

In one embodiment according to claim 7, any sliding of the bulk material to be treated is avoided in the tangential direction on the surface of the screen and a uniform distribution of the bulk material on the screen circumference along the line of its normal section is achieved.

The embodiment according to claim 8 ensures a more uniform allocation of the bulk material to be treated on the surface of the screen.

An exemplary embodiment of the invention is explained in more detail with reference to the drawings. It shows:

1 shows a machine for cleaning and / or sorting bulk goods in a schematic representation,

2 shows a longitudinal section through a rotor of the machine,

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3 shows a cross section through the rotor and through cleaning devices,

Fig. 4 shows a section through a joint for hanging the screen drum on the rotor and

Fig. 5 shows one of the cleaning devices for the screen holes and their attachment to the housing in a schematic representation.

The machine for cleaning and / or sorting bulk goods shown as an exemplary embodiment has two separating sets for cleaning and / or sorting out, which are arranged on a common frame 2 and connected to a wind classification chamber 3. Certain drives 4 are also arranged on the frame 2 for driving the separating sets 1. Although two separating sets are provided in the exemplary embodiment shown, it is also possible to equip a machine with only one separating set, which will be reported below.

Each separating set 1 has a housing 5, which in turn is attached to the frame 2. In the upper part of the housing 5, an annular wind separation channel 6 and a truncated cone-shaped spreader 7 are arranged. The spreader 7 is provided for feeding the bulk material into the wind separation channel 6. Below the wind separation channel 6 there are a rotor 8 and a sieve drum 9, which parts are also shown in FIGS. 2 and 3.

1 and 3, cleaning devices 10 and 11 are shown, which are arranged on the outside of the screening drum 9 in direct contact with the latter. According to FIG. 1, a filler neck 12 is arranged above the housing 5 and serves to feed the bulk material to the spreader 7. In the wall of the housing 5 certain openings 13 are recessed for the entry of air into the annular wind separation channel 6. Furthermore, the housing 5 is provided with discharge channels 14, 15, 16 and 17 and with manholes 18. An outlet opening 19 of the housing opens into the air separation chamber 3. The discharge channels 14 and 15 of each separating set 1 open into manifolds 20 and 21, respectively.

The wind classification chamber 3 has inlet channels 22 provided with shut-off flaps 23, an outlet channel 24 provided with a shut-off valve 25 and a further channel 26.

From Fig. 1 it can be seen that the rotor 8 is mounted within the housing 5 in an upper bearing 27 and a lower bearing 28. The upper bearing 27 is connected to the wall of the housing 5 by a funnel 29 intended for feeding the bulk material to the rotor 8. 1 and 2 show that the rotor 8 has an upper shaft part 30 which is mounted in the upper bearing 27 and which is rigidly connected to an upper disk 31. A lower, hollow shaft part 32 mounted in the lower bearing 28 is rigidly connected to a lower disk 33. The upper disc 31 and the lower disc 33 are in turn rigidly connected to one another by spacer rods 34.

From FIGS. 1, 2 and 3 it can be seen that the screen drum 9 is fastened to the rotor 8 by means of suspensions 35 and joints 36. A total of three suspensions 35 are fastened in the upper part and in the lower part of the screening drum 9 and ensure the transmission of the rotary movement from the rotor 8 to the screening drum 9 and at the same time enable a reciprocating movement and an oscillating movement in the vertical direction of the screening drum 9.

It can be seen from FIG. 2 that the sieve drum 9 is made of several parts and consists of at least two identical sections 37 and 38 arranged one behind the other. Each of these sections is designed as a rotating body, for example as a cylinder 39. The screen 39 expediently carries a support ring 40 in the section 38 and support rings 41 in the sections 37. The support ring 41 according to FIG. 3 can for example be made of a light, solid material and contains two rims 42 and 43 which run concentrically to one another and which pass through Ribs s 44 are interconnected. Through bores 45 are arranged at equal intervals from one another in the inner rim 3 according to FIGS. 2 and 3. The support ring 40 according to FIG. 2 can be made of the same material as the support ring 41 and, like this, have bores 46 at equal io distances from one another.

2 in section 38 and between the support rings 41 in section 37, spacer sleeves 47 are arranged in alignment with the bores 45 and 46.

15 Between the sections 37 and 38, the joints 36 of the suspensions 35 are arranged opposite the bores 45 in the support rings 41, while between the sections 37 a transverse stiffening 48 according to FIGS. 1, 2 and 3 is arranged such that bores arranged therein 49 ge-20 according to FIG. 2 with the bores 45 arranged in the support rings 41. In the lower part of the screening drum 9, the bores 45 of the support rings 41 are also fastened with joints 36 with suspensions 35. The sections 37 and 38 and the joints 36 and the transverse stiffening 48 are pulled together by tension lock rods 50 which are arranged at the same distance from one another and which extend through the bores 46 of the support ring 40 and through the bores 45 of the support rings 41 and the joints 35 and Extend holes 49 in the cross bracing 48. 30 The above-described construction of a sieve drum 9 from unified sections 37 and 38 with a different number of sieves enables a machine to be equipped for cleaning and / or sorting bulk goods for different performance and purpose. By standardizing these machines in this way, manufacturing and operating costs can be largely reduced.

According to FIG. 4, the suspensions 35 shown in FIGS. 1, 2 and 3 have a rod with ring eyelets 51 arranged at both ends 40. Sleeves 52 made of a wear-resistant material, for example made of rubber or elastic polyurethane, engage in these eyelets 51 from both sides. Steel sleeves 53 are inserted into the sleeves 52, through which the turnbuckle rod 50 extends at one end of the suspension 35 45 according to FIG. 2 and a bolt 54 which is rigidly connected to the rotor 8 at the other end. Such a design of the suspensions 35 achieves high operational reliability while ensuring the required kinematic movement path of the sieve drum 9.

1 wings 8 and 55 and 9 on wings 9 and 57 and 58 (see also FIG. 2) are rigidly attached to the rotor. These wings serve to remove the fractions of the separated bulk material from the separation set 1 according to FIG. 1.

2, seals 59 made of a resilient material, for example made of rubber, are installed in the butt joint between the sections 37 and 38 of the screen drum 9 between the support rings 41 according to FIG.

60 The sieve 39 shown in FIGS. 2 and 3 is divided into two equal parts I and II along a surface A (FIG. 2) and can be taken apart. However, the design according to the invention is not limited to two parts, since it is also possible to divide the screen 39 into more than 65 two parts. By dividing the sieve 39 into at least two parts, the sieve can be easily replaced.

In each of the sections 37 and 38 according to FIG. 2, hollow strips 60 (FIGS. 2 and 3) are rigid on the support rings 40 and 41

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attached. The number of hollow strips 60 required depends on the number of joints 61 according to FIG. 3. The butt joints 61 between adjacent parts I and II are bordered by the hollow strips 60, the edges 60 'and 60 "of the hollow strips 60 serving as stiffening ribs of the sieve 39 in the radial direction.

The embodiment described above achieves a seal between parts I and II of the sieve 39 at the joints 61 along the generatrix A and also increases the lifespan of the sieve 39 as a result of its greater rigidity in the radial direction. The parts I and II of the sieve 39 are held together in the region of the support rings 40 and 41 (FIG. 2) and the hollow strips 60 (FIGS. 2 and 3) by means of tensioning straps 62.

The two cleaning devices 10 and 11 according to FIGS. 1 and 3, which are arranged opposite one another with respect to the axis of rotation 63 (FIGS. 1 and 2) of the screening drum 9, serve to clean each of the screens 39 (FIGS. 2 and 3) . The cleaning device 10 has a smooth surface and the cleaning device 11 has a bristle-like surface. Although two cleaning devices are shown, depending on the size of the sieve 39, their number can also be larger, for example four.

The cleaning devices 10 and 11 are designed as rotating bodies, the shaft 64 of which is mounted on a lever 66 by means of a bearing 65 according to FIG. 5. The lever 66 is pivotable at its one end 66 ″ on a joint 67 which is connected by means of a bracket 68 to a plate 69 rigidly fastened to the housing 5. The other end 66 ′ of the lever 66 is coupled to a damper 70. The damper 70 serves to dampen the forced vibrations of the cleaning devices 10 and 11, which are caused when the sieve drum 9 is rotated.

The damper 70 shown in FIG. 5 is designed as a friction damper which has two friction elements 71 and 72. The friction member 71 is cylindrical and connected to the plate 69 by means of a rod 73 and a joint 74. The friction member 71 can, for example, be made of a material such as textolite, Kapron and Ftoroplast.

The friction member 72 is in the form of a curved strip-shaped member and is rigidly connected to the other end 66 'of the lever 66. This friction member 72 is preferably made of a solid, wear-resistant material. The convex side 75 of the curved member 72 touches the cylindrical friction member 71. The central axis 0 '(radius of curvature R) of this convex surface 75 coincides with the center 0 of the joint 67. In this connection, the surface of the convex side 75 of the friction member 72 is smooth.

The friction members 71 and 72 are pressed against one another by means of a spring 76, which also presses the cleaning devices 10 and 11 against the surface of the sieves 39 via an arm 77 which is rigidly connected to the lever 66.

Since the vibration damper 70 according to FIG. 5 is a friction damper, the structure is simple and the operational reliability is high. Depending on the frictional and magnetic properties of the bulk material to be separated, the damper 70 in the machine according to the invention can also be designed as a hydraulic or magneto-electric damper.

The cleaning devices 10 according to FIGS. 1, 3 and 5 with the smooth surface can be designed as disks 78 (FIG. 5) placed on the shaft 64. Such discs are expediently made of a wear-resistant material.

The cleaning devices 11 according to FIGS. 1 and 3 with the bristle-like surface can also be produced as disks 79 (FIG. 3) with resilient bristles 80 fastened thereon. The bristles 80 can be made, for example, from wear-resistant, synthetic materials.

A bulk material distributor 81 according to FIGS. 1 and 2 is rigidly connected to the upper shaft part 30 of the rotor 8 and is designed as a truncated cone, the larger base area 82 of which points upwards.

Strip-shaped longitudinal ribs 83 are attached to the inner surface of the sieve drum 9, for example on the support ring 40 (FIG. 2), surrounding the bulk material distributor 81. Such a common arrangement of the bulk material distributor 81 and the longitudinal ribs 83 ensures uniform input and distribution of the bulk material to be separated in the sieve drum 9 (FIGS. 1, 2 and 3).

For driving the rotor 8 in each separating set 1 according to FIG. 1, an electric motor 84 is fastened to the frame 2 with a pulley 85, which is connected via a belt drive 86 to a pulley 87 fastened to the shaft of the rotor 8.

In order to set each screen drum 9 in accordance with FIG. 1 in an oscillating movement along the axis 63 on each rotor 8, a vibrator (vibrator) 88 is attached to the frame 2 and has a crankshaft 89 connected to an electric motor 90. On the crank 91 of the crankshaft 89 is a rod. 92 (FIGS. 1 and 2) mounted, which is connected to the transverse reinforcement 48 via a spherical bearing 93. To relieve the crankshaft 89 of the weight of the sieve drum 9, the cross-bracing 48 is connected to the shaft 30 of the rotor 8 via a spring 94 (FIGS. 1, 2). With this measure, the transfer of the weight of the screen drum 9 to the rotor 8 is achieved.

If it is necessary to reduce the nominal power of the machine designed according to the invention, only a single separating set 1 (FIG. 1) can be arranged in it, for example. In this context, the number of drives 4 also decreases accordingly, the dimensions of the frame 2 decrease proportionally, while the air classifying chamber 3 is designed with a correspondingly reduced number of channels 22 and flaps 23. The header tubes 20 and 21 are unnecessary.

The machine designed according to the present invention for cleaning and / or sorting bulk goods works as follows. When the electric motor 84 (FIG. 1) is switched on, the rotor 8 is driven in rotation by means of the belt drive 86. At the same time, the rotary movement is transmitted from the rotor 8 to the sieve drum 9 via the suspensions 35 (FIGS. 1, 2, 3). The cleaning devices 10 and 11 (Fig. 1,3) rotate by the action of the frictional forces from the sieves 39 (Fig. 2, 3) of the sieve drum 9 (Fig. 1, 2). When the further electric motor 90 (FIG. 1) is switched on, the crankshaft 89 of the vibrator 88 also begins to rotate, as a result of which the rod 92, via the transverse reinforcement 48, causes the sieve drum 9 (FIGS. 1, 2) to oscillate (reciprocating movement). offset along the axis 63.

The bulk material to be separated is introduced through the filler neck 12 (FIG. 1), through which it reaches the spreader 7, which rotates together with the rotor. At the same time, the air is drawn back through the inlet openings 13, the annular wind separation duct 6, the outlet opening 19, the inlet duct 22, the wind classification chamber 3, the further duct 26 and further in the additionally installed pneumatic conduit pipe to the blower mounted outside the machine whose help just sets the air in motion.

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The bulk material to be separated, which remains in the annular wind separation channel 6 through the spreader 7, is blown through the air flow, through which the light particles are separated from the bulk material in question, which are then conveyed with the air into the wind classification chamber 3 and from there into the outlet channel 24 are carried out, from which they are passed through the flap 25 into the collecting tube 20.

The bulk material to be separated, which is processed in this way by means of air, is now passed in the hopper 29 to the bulk material distributor 81, which rotates together with the rotor 8. Since the distributor 81 is designed in accordance with the present invention, the bulk material slides on its inner surface in the radial and tangential directions and is thereby distributed uniformly along the surface of the support ring 40 (FIG. 2) on which the longitudinal ribs 83 (FIG. 1.2 ) are attached. The longitudinal ribs 83 take the same portions of the bulk material and give them the rotational speed which is the same as the rotational speed of the sieve drum 9. Furthermore, the longitudinal ribs 83 prevent the aforementioned bulk portions from sliding in the tangential direction. All of these conditions result in a more even distribution of the bulk material to be separated along the circumference of the sieves 39 (FIGS. 2, 3), which is of the greatest importance for a high performance of the sieves 39. This increases the productivity of the machine and the quality of the bulk goods treated.

When the bulk material to be separated is rotated in the sieve drum 9- (FIG. 2), a centrifugal force arises which presses the bulk material onto the inner surface of each of the sieves 39, while the oscillating movement of these sieves together with the sieve drum 9 develops an additional inertia force which occurs at their Interaction with the gravity of the particles causes a translational movement of the bulk material to be separated on the surface of the sieves 39 from top to bottom. The entirety of these measures ensures a more intensive sieving, for example with the upper sieve 39 (FIG. 2) of the smallest particles, with the middle sieve 39 of the larger particles and with the lower sieve 39 of the still larger bulk material particles. Each of the fractions of the bulk material obtained is correspondingly carried out by the wings 58, 57, 56 (FIGS. 1, 2) into the discharge channels 14, 15, 16 (FIG. 1).

The largest particles of the bulk material to be separated are discharged from the lower sieve 39 (FIG. 1) with the wings 55 into the discharge channel 17. In this way, the separation of the starting mixture in the bulk material into the required number of fractions is carried out, which represents an important advantage of the machine designed according to the invention compared to the previously known machines.

The hollow strips 60 (Fig. 2, 3) prevent penetration of the bulk material to be separated at the joints 61 (Fig. 3) between parts I and II of the sieves 39, which eliminates any possibility of contaminating the fractions of the bulk material obtained, so that in this context the quality of the performance of the machine according to the invention is improved.

When the bulk material is sifted through the sieves 39 (FIGS. 2, 3), their holes are quickly blocked by the particles of the bulk material to be separated. These clogging particles are pressed out of the sieve holes by the cleaning devices 10 and 11 (FIGS. 1, 3). The inventive arrangement of the cleaning devices 10 and 11 with respect to the axis of rotation 63 (FIGS. 1, 2) of the screen drum 9 (FIGS. 1, 2, 3) enables the holes in the screens 39 (FIG. 2 , 3) for comparison with the arrangement of the cleaning devices, in which these of type 10 or 11 are only mounted on one side of the screening drum 9 in the known machines. This measure also favors a significant improvement in the operational effectiveness of the sieves 39.

As a result of the joint use of the cleaning devices 10 (FIGS. 1, 3) with the smooth surface and the cleaning devices 11 with the bristle-like surface in the machine designed according to the present invention, the holes in the sieves 39 (FIG. 2, 3) improved in that the relatively rigid cleaning devices 10 with the smooth surface more effectively push out the bulk material particles retained in the sieve holes, which protrude beyond 15 the outer surface of the sieves 39.

The cleaning devices 11 (FIGS. 1, 3) carrying resilient bristles 80 (FIG. 3) with greater effectiveness push out the bulk material particles which are retained in the depth of the sieve holes. Only this joint use of the cleaning devices 10 and 11 enables a more intensive cleaning of the screen holes in comparison to the separate use of the devices, so that the productivity and quality of the machine according to the invention is additionally increased in this context.

When the cleaning devices 10 and 11 (FIG. 3) roll on the surface of the sieves 39, the cleaning devices 10 and 11 are lifted from the surface as a result of various influencing variables, for example by bulk material particles protruding from the holes. Such a type of movement of the cleaning devices 10 and 11 is always associated with a reduction in the intensity of the cleaning of the sieve holes. In order to substantially limit the negative effect of this phenomenon, the cleaning devices are equipped with the friction damper 70 (FIG. 5). When the cleaning devices 10 and 11 (FIGS. 3, 5) are lifted off the sieve 39, the friction member 72 (FIG. 5) of the damper 70 moves with respect to the cylinder member 71, a substantial part 40 of the kinetic energy of the cleaning device 10 or 11 of the available force is consumed by the frictional forces which act as a result of the close contact of the friction members 71 and 72. Thanks to the design of the friction member 72 in the form of a curved strip 45, the center of curvature 0 'of which coincides with the center 0 of the joint 67, and the friction member 71 in the form of a cylinder, the continuity of the displacement (sliding) of the cylinder member 71 on the convex surface 75 of the friction strip 72 without cracks and wedges guaranteed. In this connection, the operational safety of the damper 70 and effectiveness in cleaning the sieves 39 are substantially increased by the cleaning devices 10 and 11 (FIGS. 1, 3).

55 In the machines for cleaning and / or sorting bulk goods of the type according to the invention, it is very important to ensure effective cleaning of the screens, which must be easily removable and standardized. Precisely due to the design of the sieve drum 9 60 (FIGS. 1, 2), in which it is composed of several sections 37 and 38, and the sieves 39, which are assembled so as to be disassembled along the surface generators and consist, for example, of two parts I and II, and the arrangement of the cleaning devices 10 and 11 opposite one another according to the invention achieves the main advantage of the machine according to the invention, which represents a substantial increase in operating performance and a high level of standardization. Beyond that

From the joint use of the cleaning devices 10 with the smooth and 11 with the bristle-like surface and the connection of these cleaning devices 10 and 11 with the damper 70 designed according to the invention brings an additional improvement in the operating efficiency of the machine by means of a more intensive cleaning process

the sieve holes. In addition to this effect, the operational efficiency of the machine according to the invention is substantially improved by ensuring a more uniform input of the bulk material to be separated into the sieves 39 as a result of the use of the bulk material distributor 81 and the longitudinal ribs 83 according to the invention.

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Claims (6)

643 470 PATENT CLAIMS 1. Machine for cleaning and / or sorting bulk goods, with at least one separating set (1) which is arranged in a housing (5) fastened to a frame (2), in which a bulk material spreader (7) and pneumatically actuated separation chambers are arranged one behind the other are with a runner (8) carrying a sieve drum (9), in the upper region of which a bulk material distributor (81) is arranged, with cleaning devices (10, 11) arranged on the outside of the sieve drum (9) in direct contact with the latter a drive (4) fastened to the frame (2) and simultaneously setting the sieve drum (9) into a rotating and oscillating movement and having a wind classification chamber (3) into which an outlet opening (19) of the separating set (1) opens, characterized in that that the sieve drum (9) is subdivided into a plurality of sections (37, 38) arranged one behind the other, each section of which has a sieve (39) designed as a rotating body, which is arranged in support rings (40, 41) It is fastened that all sections (37, 38) are connected by means of turnbuckle rods (50) which extend through the support rings (40, 41) and are arranged at equal distances from one another, and that the cleaning devices (10, 11) are connected with respect to the axis of rotation ( 63) the screening drum (9) are arranged opposite one another. 2. Machine according to claim 1, characterized in that the screen (39) along a surface (A) generating its surface divided into several parts (I, II) and can be taken apart. 3. Machine according to claim 2, characterized in that the joints (61) of the disassemblable parts (I, II) are enclosed in hollow strips (60), the edges (60 ', 60 ") of the hollow strips (60) serving as stiffening ribs of the sieve (39). 5 4. Machine according to claim 1, characterized in that the one cleaning device (10) has a smooth and the other (11) has a bristle-like surface. 5. Machine according to claim 4, characterized in that each of the cleaning devices (10, 11) has the shape of a lo nes rotating body, the shaft (64) is movably attached to a lever (66), one end (66 ") via a hinge (67) to the housing (5) and the other end (66 ') with a damper (70) and that the cleaning devices (10, 11) are pressed against the outer surface of the screening drum (9) by means of a spring (76) on i5. 6. Machine according to claim 5, characterized in that the damper (70) has a pair of friction members (71, 72), one of which (71) is cylindrical and movably connected to the housing (5) and of which the 2o dere (72) has the shape of a curved strip-shaped member and is rigidly connected to the other end (66 ') of the lever (66) that the convex side (75) of the curved member (72) touches the cylindrical friction member (71) and the central axis (0 ') of curvature with the 25 axis of the joint (67) coincides. 7. Machine according to claim 3, characterized in that strip-shaped longitudinal ribs (83) are arranged on the inner surface of the screening drum (9), surrounding the bulk material distributor (81). 30 8. Machine according to claim 7, characterized in that the bulk material distributor (81) is frustoconical and its larger base (82) is directed upwards.