MALMBERG, Mats (Tånebro Solberga 1244, Rydsgård, SE-274 63, SE)
| CLAIMS 1 . Support carrier of a supporting structure of a vibrating screen, characterized in that the support carrier (3, 8, 10, 22, 25, 27, 29, 31 ) has at least one straight element (3a, 8a, 10a) and at least one integrated spacer part (5, 9, 1 1 ) and that the at least one straight element (3a, 8a, 10a) is made in one piece with the at least one spacer part (5, 9, 1 1 ). 2. Support carrier of claim 1 , wherein the main extensions of the at least one straight element (3a, 8a, 10a) and the at least one spacer part (5, 9, 1 1 ) of the support carrier (3) are perpendicular to each other. 3. Support carrier of any of the previous claims, wherein the support carrier (3) is formed of two straight elements (3a) and two spacer parts (5) forming a rectangular frame and wherein the two straight elements (3a) are placed on opposite sides of the frame and the spacer parts (5) are placed on opposite sides of the frame. 4. Support carrier of claim 1 or 2, wherein the support carrier (8, 22, 25, 27, 29, 31 ) has one straight element (8a) and a spacer part (9) at each end of the straight element (8a). 5. Support carrier of claim 1 or 2, wherein the support carrier (10) has one straight element (10a) and one spacer part (1 1 ) at one end and wherein the support carrier (10) has a free end opposite the end with the spacer part (1 1 ). 6. Support carrier of claim 4 or 5, wherein the spacer parts (9, 1 1 ) extends equal lengths on either side of the support carrier (8, 10, 22, 25, 27, 29, 31 ). 7. Support carrier of claim 3 or 4, wherein each straight element (3a, 8a) of the support carrier (3, 8, 10, 22, 25, 27, 29, 31 ) at the top has an extending part (33) at one end and a complementary groove (34) at the other end, which extending part (33) of one straight element (3a, 8a) is to be received in the groove (34) of one adjacent straight element (3a, 8a) at mounting. 8. Support carrier of claim 5, wherein the straight element (10a) is formed of two parallel plates (12) fixed to each other by means of a number of attachment means (13) placed between lower edges of the two plates (12), wherein a lug (16) extend from one end of each plate (12) on top of the spacer part (1 1 ), wherein a groove (14) is arranged at the free end of the support carrier (10), which groove opens downwards, and wherein a pin (17) is arranged on the outside of each lug (16), which pins (17) are directed in opposite directions and are to be received in the groove (14) at the free end of an adjacent support carrier (10) at mounting. 9. Support carrier of any of the previous claims, wherein the spacer parts (5, 9, 1 1 ) have a form adapted to be received on stanchions (6, 7, 20) of transversal carriers (4, 19) and which transversal carriers (4, 19) are placed perpendicular to the support carriers (3, 8, 10, 22, 25, 27, 29, 31 ). 10. Support carrier of any of the previous claims, wherein the upper edge of each straight element (3a, 8a, 10a) has a rail (18, 21 , 26, 30, 32) or a groove (23, 28) and wherein the rail (18, 21 , 26, 30, 32) or the groove (23, 28) is formed to receive screening media. |
Technical Field
The present invention concerns a support carrier of a support structure. The support structure is to support screening media in a vibrating screen.
Prior Art
In vibrating screens used for fractionation of for example crushed stones and gravel into fractions of stones with different sizes, screening media are used having screening holes for allowing stones smaller than the screening holes to pass through the holes.
Vibrating screens are known having an adapter system or a supporting structure to be able to use different types of screening media. The screening media normally have the form of a wire mesh, polymer mats, panels or modular screening elements. The supporting structure has the form of a number of elements placed in a grid supporting the screening media.
In one previously known embodiment the support structure is formed of support carriers and transversal carriers. The support carriers are placed in line with each other in several parallel lines of support carriers. Also the transversal carriers are placed in line with each other in several parallel lines of transversal carriers. The support carriers are placed on top of the transversal carriers and perpendicular to the transversal carriers. Loose spacer elements are placed on top of the transversal carriers. The spacer elements are to keep a proper distance between the lines of support carriers. Even though they normally functions well, in some cases the spacer elements have not been able to hold a proper distance between the support carriers.
Summary of the invention
One object of the present invention is to facilitate handling of parts of the support structure of the vibrating screen, both regarding mounting, storing and transportation. A further object is to guarantee that the parts of the support structure are placed at proper positions in relation to each other. Still a further object is to be able to amend the set-up of the vibrating screen without having to make any major rebuilding of the vibrating screen. The set-up of the vibrating screen may be amended depending on the type of material to be fractionized, the sizes of the fractions etc. For such amendments it may be necessary to change the size or type of the screening media used.
By integrating spacer elements with the support carriers of the supporting structure, fewer parts need to be handled. Furthermore, the spacing between adjacent support carriers is held more exactly. According to the present invention each support carrier has at least one straight element and at least one spacer part, which at least one straight element of each support carrier is made in one piece with the at least one spacer part. The straight elements and spacer parts of each support carrier are placed perpendicular to each other.
Further objects and advantages of the present invention will be obvious for a person skilled in the art when reading the detailed description below of some embodiments of the invention.
Brief Description of the Drawings
The invention will be described further below, by way of examples and with reference to the enclosed drawings. In the drawings,
Fig. 1 is a perspective view of a vibrating screen, in which the present invention may be implemented,
Fig. 2 is a perspective view of one example of a supporting structure for the screening media,
Fig. 3 is a plan view of a first example of support carriers and integrated spacer parts according to the present invention and as shown in Fig. 2, Fig. 4 is a plan view of a second example of a support carrier and integrated spacer part according to the present invention,
Fig. 5 is perspective view of support carriers as shown in Fig. 4, placed in a supporting structure,
Fig. 6 is a plan view of a third example of a support carrier and integrated spacer part according to the present invention,
Fig. 7 is a side view of the support carrier with integrated spacer part of
Fig. 6,
Fig. 8 is a perspective view of support carriers as shown in Figs. 6 and 7, placed in a supporting structure, and
Figs. 9a-9f show a number of support carriers in perspective view and end view, respectively, having varying upper form.
Detailed Description of Embodiments
As used in this description the expressions "upper", "lower" and similar expressions are in view of the drawings referred to and with the normal orientation of a vibrating screen.
In Fig. 1 one example of a vibrating screen 1 is shown. It has a screening deck receiving materials to be screened, such as crushed stones, gravel etc. The screening deck is furnished with screening media, formed of a number of modular screening elements 2, a wire mesh, polymer mats or panels. The screening media are received on some kind of support structure.
The support structure is formed of support carriers and transversal carriers 4. The transversal carriers 4 are placed transversal to the direction of motion of the material to be screened and the transversal carriers 4 are placed parallel with each other. The transversal carriers 4 are fastened by bolting, welding or other suitable fastening means to cross members (not shown) of the vibrating screen deck. The support carriers are placed parallel to each other on top of the transversal carriers 4. The support carriers are placed perpendicular to the transversal carriers 4.
In the example shown in Figs. 2 and 3 the support carrier 3 is formed of two straight elements 3a and two spacer parts 5, together forming a rectangular frame, as viewed from above. The two straight elements 3a are placed on opposite sides of the frame and the two spacer parts 5 are also placed on opposite sides of the frame. The support carrier 3 comprising two straight elements 3a and two spacer parts 5 are made in one piece. In use the frame is placed on the transversal carriers 4 with two straight elements 3a of adjacent support carriers 3 abutting each other and with two spacer parts 5 of adjacent support carriers 3 abutting each other. Each straight element 3a of the frame has half the normal thickness of the straight elements of the supporting structure. Thus, when two straight elements 3a of two adjacent frames are placed abutting each other they will together have the normal thickness. The spacer parts 5 are placed on stanchions 6, 7 of the transversal carriers 4, whereby the spacer parts 5 have a groove on the lower side adapted to the form of the stanchions 6, 7. In the example of Figs. 2 and 3, the stanchions 6, 7 have different heights and therefore the spacer parts 5 of each frame are positioned on different heights, to be adapted to the heights of the stanchions 6, 7. In other embodiments the stanchions are of the same height, whereby also the spacer parts are placed on equal height in the frame.
In Figs. 4 and 5 a further example of a support carrier 8, according to the present invention is shown. The support carrier 8 has a central straight element 8a and one spacer part 9 at each end of the straight element 8a. The spacer parts 9 are placed perpendicular to the straight element 8a and extend equal distances on either side of the straight element 8a. Thus, the support carrier 8 will have the shape of an Ί", as seen from above. The support carrier 8 is made in one piece, thus, the spacer parts 9 are integrated with the straight element 8a of the support carries 8.
The support carriers 8 are placed on stanchions 6, 7 of the transversal carriers 4. In the examples of Figs. 2 and 5, the transversal carriers 4 have two stanchions 6, 7 placed parallel with each other and at a distance from each other. The two stanchions 6, 7 shown have different heights, but in other embodiments the stanchions are of the same height. The spacer parts 9 of the support carriers 8 are placed on one stanchion 6, 7 each of the transversal carriers 4. The spacer parts 9 each has a groove on the lower side. The form of the groove is adapted to the form of the upper part of respective stanchion 6, 7. On each transversal carrier 4, the spacer parts 9 of two support carriers 8 placed in line are received, with one spacer part 9 on each stanchion 6, 7. Thus, two support carriers 8 are placed abutting each other on the transversal carriers 4. In the embodiments shown in Figs. 2 to 5 the upper central part, or top, of each straight element has an extending part 33 extending a short distance at one end of the straight element and has a complementary groove 34 at the other end. The extending part 33 has a vertical straight part having a thickness adapted to the width of the groove 34. Thus, when two support carriers 8 are placed abutting each other the vertical part of the extending part 33 at the top of one support carrier 8 is received in the complementary groove 34 at the top of the adjacent support carrier 8. In use two adjacent support carriers 8 are placed with the ends of the spacer parts 9 abutting each other. Thus, the distance between the support carriers 8 is dictated by the distance respective spacer part 9 extends from the straight element 8a of respective support carrier 8.
The support carrier 10 of Figs. 6-8 has an elongated form, and in the shown embodiment it has a straight element 10 formed of two plates 12 placed at short distance from each other and parallel to each other. The two parallel plates 12 are fixed to each other by means of a number of attachment means 13. Each support carrier 10 has a spacer part 1 1 at one end and is placed perpendicular to the plates 12 of the support carrier 10 and extends on both sides of the support carrier 10. The spacer part 1 1 is made in one piece with the rest of the support carrier 10. The spacer part 1 1 extends the same distance from the straight element 10a of the support carrier 10 at both sides. Thus, the support carrier 10 with the spacer part 1 1 has the shape of a "T", as seen from above.
At the free end of the support carrier 10, i.e. the end opposite the end with the integrated spacer part 1 1 , there is a groove 14 open from below. The groove 14 is used when attaching the support carriers 10 to each other in forming of the support structure.
The spacer parts 1 1 have two rails 15 extending downwards, between which rails 15 a groove is formed. The rails 15 are used in attaching the spacer parts 1 1 to stanchions 20 of transversal carriers 1 9. The spacer parts 1 1 assist in keeping the straight elements 10 a of the support carriers 10 at proper mutual distance from each other.
In the area of connection between the support carrier 10 and the spacer part 1 1 , a lug 16 extends from each plate 12. Thus, there are two lugs 16. The lugs 16 have the same direction as the plates 12 of each support carrier 10, and the lugs 16 extend perpendicular to the extension of the spacer part 1 1 . The lugs 16 are placed on top of the spacer part 1 1 . A pin 17 is placed on each lug 16, which pin 17 extends a distance from the lug 16 directed outwards. The pins 17 are received in the grooves 14 at the free end of an adjacent support carrier 10.
In use the support carriers 10 are placed in line abutting each other and with the spacer element 1 1 of each support carrier 10 placed on the stanchion of a transversal carrier 19.
On top of each support carrier 10, a rail 18 is shown on top of each plate 12. The plates 12 may also have groves on the inside, or other means, used to fix screening media to the support carriers 10. The exact form of the rails 18 and possible grooves is adapted to the form of the screening media to be received.
As indicated in Figs. 9a-9f, the top of each straight element of the support carriers may have different forms. The different forms are adapted to the design and make of the screening media to be received on top of the support carriers.
The support carrier 8 of Fig. 9a corresponds with the support carrier of
Figs. 4 and 5 and has a rail 21 at the top. Also the support carriers 25, 29, 31 of Figs. 9c, 9e and 9f, respectively, have a kind of rail 26, 30, 32 each. The support carrier 22 of Fig. 9b has a groove 23 at the top. In the middle of the groove 21 , as seen in longitudinal direction of the straight element of the support carrier 22, there is a raised part 23. Also the support carrier 27 of Fig. 9d has a groove 28 at the top of the straight element of the support carrier 27.
A person skilled in the art realizes that the features of the different embodiments described may be combined in many different ways.
The disclosures in the Swedish patent application No. 1050232-6, from which this application claims priority, are incorporated herein by reference.