HU197235B - Screen structure - Google Patents

Abstract

Die Erfindung betrifft eine Siebvorrichtung mit einem Rost, der mehrere Roststäbe (11) aufweist, die durch an ihnen befestigte, die Spalten zwischen den Roststäben überbrückende, flexible Siebelemente (3) verbunden sind und bezweckt die Lösung der beiden Auf­gaben, einerseits die Siebleistung zu erhöhen und ander­seits die Massenkräfte innerhalb des Rostes weitgehend zu kompensieren. Dies wird dadurch erreicht, daß die Roststäbe (11) in einem Rahmen (1) in mehreren Richtun­gen, vorzugsweise in zwei einander entgegengesetzten Richtungen, in einer Ebene senkrecht zu ihren Längs­achsen beweglich gelagert und einzeln an beiden ihrer Enden mit einem sie in Bewegung versetzenden Antrieb (18,19,24;31,35) versehen sind. Hiebei können die Rost­stäbe (11) im Rahmen (1) federnd gelagert und die An­triebe Unwuchtantriebe (18,19,24;38) sein, oder die Roststäbe sind beiderseits auf rotierenden Exzentern (31) gelagert und gegen eine Verdrehung um ihre Längsachse verhindert.

Description

BACKGROUND OF THE INVENTION The present invention relates to a sieve structure having a screen having a plurality of sieve bars. These screen rods are connected by flexible screen elements that bridge the spacing between the screen rods and are secured to the screen rods.

In this type of known siliceous structure, the grid beams are arranged transversely to the screening direction and provided with two mutually movable grid frame systems 10, in which the grid bars of the systems are interconnected in pairs.

The object of the present invention is to improve the known sieve structures, i.e. to increase the screening performance on the one hand and to balance the mass forces within the sieve 15 on the other hand.

The object of the present invention has been solved by providing longitudinally or transversely arranged fiber sticks in a plurality of directions, preferably in two opposite directions, arranged in a plane perpendicular to their longitudinal axis and provided with a movable drive at each end thereof. .

It is desirable to have an embodiment in which the fiber rods are resiliently embedded in the frame and the shoots are formed as unbalanced shoots. Instead of unbalanced shoots 30, a rotating eccentric may also be advantageously used, in which the longitudinal axis rotation of the fiber rods is prevented.

Mass balancing may be achieved by having the bars of the fiber rods embedded in the eccentric arms alternately or grouped together and in the opposite direction of rotation. Where appropriate, counterweights may be used for this purpose.

Preferably, the drives are arranged in phase shifts, the value of which can vary within wide limits. The phase shift angle is preferably 360 ° / a, where the integer is greater than 1. Within a single group, the number of drives may be equal to the value.

In a further preferred embodiment of the sieve structure according to the invention, the fibers are located in the screening direction, the screen itself is known to have an acute angle with the screening direction, and the screen elements are connected laterally to the screen and terminate in the screening direction. The advantage of this arrangement 55 is that by eliminating the hitherto unavoidable leaks on the longitudinal edges of the sieve, the finer products are screened. Preferably, the material to be screened is dispensed at a considerable distance from the upper screen end, thereby eliminating the sealing problems θθ. At the lower end of the screen, the screen elements terminate at a sufficient distance from the screen frame to achieve good material transfer.

Other embodiments of the invention will be described below.

The invention will be described in more detail on the β-sheet of the accompanying drawings, which illustrates an exemplary embodiment of the present invention. In the drawing:

Figure 1 is a longitudinal sectional view of the screen structure of the present invention;

Figure 2 is a plan view of the solution of Figure 1;

Figure 3 is a cross-sectional view of the solution of Figure 1 and 2;

Figure 4 is a sectional view illustrating the embedding of the barbell and the associated unbalanced drive;

- f ·. and Fig. 6 is a longitudinal or cross-sectional view of a further embodiment of the mesh structure of the present invention in which the fiber rods are mounted on rotating eccentrics;

Figure 7 illustrates a variant in which the fiber bars are embedded with leaf springs;

Figures 8 and 9 are cross-sectional and side views, respectively, of a further embodiment in which the axis of the screen rod and the eccentric drive are supported by leaf springs.

As shown in the drawing, in a sieve frame 1, the filaments 2 are arranged in a transverse direction in the screening direction, the spacing between them being bridged by sieve elements 3 so as to form a continuous screen surface.

The screen also has a dispensing hopper 4 and an outlet 5 and is provided with a lid 6. The screen structure is supported by springs 7 on the basis indicated by reference numeral 8.

On the base 8, lateral propulsion motors 9 are arranged which drive the unbalanced drives of the fiber rods through an axis 10 (Fig. 2).

EurLex-2 en Figure 4 shows that the fiber rods have 11 tubes with welded flanges at their ends. The flange 12 is screwed by 14 discs 14 in the fall. The disc 14 is secured to the screen frame 1 by means of a rubber ring 15 and can therefore oscillate transversely to the longitudinal axis of the screen rod.

The disc 14 has a hub 16 on which: 18 the discs are pivotally mounted by means of a rolling pin 7. The disk 18 is rigidly connected to the disk 19, which in turn is secured to the shaft 20 by a wedge 21. The spindle 20 is housed in a tubular space 22 which is disposed inside the tube 11 and is connected at the other end by an unbalanced drive. On the unshaped side of the screen frame 1, a connection 10 is made between the drive motor 9 and the tubular shaft 22 by means of the shaft 10.

The disc 18 is provided with a plurality of openings 23 in which weights 24 can be inserted.

The tube 11 holds my attachment 25, which is rigidly connected to the screen element 26.

In the embodiment of Figure 5, the tubes 11 of the fiber rods are pivotally mounted on the rotating eccentric 31, but their rotation is prevented by a lever 32. The arms 32 sit on the tubes 11 and are joined by rods 33 and 34, respectively, so that the eccentric 31 on the roet bars of both groups have the same phase position. The eccentric 31 may have a common fold. The eccentric 31 are seated on the eccentric axis 35 in the tube 11 and are pivotally mounted on the hollow frame 1 by means of a roller bearing 36. A counterweight 37 is provided on the eccentric shaft 35 for weight balancing.

According to Figure 7, the unbalanced fold 38 is resiliently mounted on the screen frame 1 by inserting leaf springs 39. In this arrangement, only the drives 38 can make oscillations parallel to their frames. The leaf springs do not necessarily have to be perpendicular to their frames when they are at rest, and they can close at an angle of less than 90 ° to the frame. In this way, the direction of rotation of the fiber rods can be selected. Such a leaf suspension can also be used for eccentric drives, as illustrated, for example, in Figures 8 and 9.

In this embodiment, s is embedded in an eccentric shaft 35 which is resiliently coupled to the screen frame 1 by leaf springs 41. Here, as in the embodiment shown in Figure 7, the tube 11 of the fiber rod is resiliently connected to the fiber frame 1 by two leaf springs 39. Therefore, in the present embodiment, the barbell rods can only swing parallel to the frame. If the leaf springs 39 and 41 are disposed in a position different from that of the frame rails, the tubes 11 of the barbell rods may have a selectable direction of oscillation. The leaf springs 39 and 41 need not be perpendicular to each other.

The leaf spring suspension has the additional advantage over the embodiment of Fig. 4 that it further reduces energy losses and consequently increases efficiency. A further advantage is that the leaf springs 39 prevent the rotation of the tube 11 of the fiber rods from the outset, so that the rods 33 and 34 (Fig. 5) are not required.

Through phase shift, a distance change occurs between the fiber rods, resulting in alternating loosening and tensioning of the sieve elements. However, it is not possible for the adjacent sieve elements to be in tension at the same time. The time shift between the tensioned state of each element and the tensioned state of the adjacent screen element is always dependent on the direction of the force vectors acting on each of the rods.

Unbalanced drives can be driven t. individually or in groups. During this, the direction of rotation, the frequency and / or the amplitude and the phase position of the unbalanced drives can be adjusted so that the mesh structure can be adjusted for optimal performance even with the inherent properties of the material being screened. In the exemplary embodiment illustrated, the direction of rotation and the rotation pattern of unbalanced drives arranged at the two ends of the screen rod are selected. However, it is also possible to have a separate drive motor for each unpaired drive,

The better the mass balancing, the more the unbalanced drive speeds are the same. Therefore, it is advisable for unbalanced drives to be synchronized. Preferably, a toothed belt drive may be used.

The direction of the force vectors depends on the arrangement of the weights 24. If both unbalanced drives of the fiber rod are taken into account, then the weights 24 may be arranged in different apertures 23 so that the fiber rod will perform a reciprocating motion. By positioning the weights 24 in different openings 23, the phase angle between the unbalanced folds of adjacent fiber rods can be adjusted. Using different weights of the pond we get different amplitudes.

The barbed rods may also be arranged with a fibrous rod rigidly fixed to the screen frame between adjacent sections.

With the arrangement according to the invention, the screen structure has been found to be very well adapted to different screenable materials having different properties. A further advantage is that no or at least slight mass forces are transmitted to the base.

Claims (23)

PATENT CLAIMS A sieve structure with a sieve having a plurality of sieve bars, which are joined by flexible sieve elements bridging the gaps between the sieve bars, characterized in that the sieve bars (2; 11,) arranged longitudinally or transversely to the sieve direction are arranged in several directions. , preferably in two opposite directions, movable in a plane perpendicular to their longitudinal axis and provided with actuating motors (18, 19, 24; 31, 35) individually at each end. Priority: October 1985 07th Screen structure according to claim 1, characterized in that the fiber rods (11) are resiliently embedded in the frame (1). Priority: October 1985 07th A screen structure according to claim 2, characterized in that the fiber rods (11) are provided with resiliently embedded rubber rings or leaf springs (39). Priority: October 1985 07.5 4. A sieve structure according to any one of claims 1 to 4, characterized in that the actuating folds are formed as unbalanced folds (18, 19, 24; 38). Priority: October 1985 07.10.10 A screen structure according to claim 4, characterized in that the unpaired shoots (18, 19, 24; 38) are individually or in groups and are independent of each other. Priority: October 1985 07/15/15 Screen structure according to claim 4 or 5, characterized in that the unbalanced shoots (18, 19, 24; 38) are individually adjustable in frequency and / or amplitude. 20 Priority: October 1985 07th 7. A sieve structure according to any one of claims 1 to 5, characterized in that the unpaired shoots are forced synchronously at least in groups. 25 Priority: Dec. 1985 23rd A screen structure according to claim 7, characterized in that the unbalanced drives are provided with a forced synchronizing power drive. 30 Priority: Dec. 1985 23rd 9. A sieve structure according to any one of the preceding claims, characterized in that the fiber rods (11) are mounted on double-sided rotatable eccentrics (31) and secured against rotation about their longitudinal axis. Priority: March 1985 17th Screen structure according to claim 3 or 9, characterized in that the rubber rings (15) or leaf springs (39) for the flexible support of the screen rods (11) are arranged to prevent rotation of the screen rods. Priority: October 1986 07th A screening device according to claim 10, characterized in that the eccentric axis (35) is resiliently mounted in the screen frame (1). Priority: October 1986 07th A screen assembly according to claim 11, characterized in that the eccentric shaft (35) is provided with resiliently mounted leaf springs (41). Priority: October 1986 07th A screen structure 55 according to claim 10 or 12, characterized in that the flexible bearing directions of the screen rods (11) and the eccentric shaft (35) are perpendicular to one another. Priority: October 1986 07.60 7 drawings, 9 A screen structure according to claim 9, characterized in that the fiber rods (11) embedded in the eccenters (31) have arms (32) which are connected by groups of rods (33, 34) through which the rods of the group (11) are in the same phase position. Priority: March 1986 17th 15. A 9-14. A sieve structure according to any one of the preceding claims, characterized in that the eccentric shafts (35) are provided with a mass-balancing counterweight (37). Priority: March 1986 17th 16. A device according to any one of claims 1 to 5, characterized in that the eccentric (31) is engaged by a rotary drive. Priority: March 1986 17th 17. A sieve structure according to any one of claims 1 to 4, characterized in that the drives are of the same speed, but the adjacent drives have a phase shift Priority: Dec. 1985 23rd 18. The screen structure of claim 17, wherein the phase shift angle is? 60 ° / a, wherein the integer and greater Than 1. Priority: Dec. 1985 23rd 19 Figure 1-18. A screen structure according to any one of claims 1 to 5, characterized in that the direction of rotation of all the drives is the same. Priority: Dec. 1985 23rd 20. A sieve structure according to any one of claims 1 to 4, characterized in that the successive shoots are rotated individually or in groups. Priority: Dec. 1985 23rd A screen structure according to claim 20, wherein the number of shoots per group is equal to its value. Priority: Dec. 1985 23rd 22. A sieve structure according to any one of claims 1 to 3, characterized in that the movable fiber sticks (11) are arranged in sections, between which there is inserted a strip arranged correctly in the screen frame (1) and connected to the screen elements. Priority: October 1985 07th 23. A sieve structure according to any one of claims 1 to 3, characterized in that the sieve rods are arranged in the screening direction with respect to the screen being inclined, the screen elements being connected laterally to the screen frame (1) and terminating in front of the screen frame (1). Priority: October 1986 07th