ES2291462T3 - SCREEN PANEL AND SCREEN MACHINE EQUIPPED WITH THIS SCREEN PANEL. - Google Patents

Abstract

The invention relates to a screening panel comprising screening elements which are arranged next to each other and which are detachably fixed to steel profile sections of a supporting structure by means of a separate profiled section made of plastic and which is mounted inbetween the screening elements. The plastic profiled section and the screening elements have corresponding engaging profiles which are held in a positive fit by fixing means which can be inserted from the top into the plastic profiled section. The plastic profiled section also has a base profile which can be engaged into the steel profile of the supporting structure. The plastic profiled section is embodied in the form of a profiled strip . The fixing means is embodied as a wedge strip and the engaging profiles are continuous in form. The upper area of the wedge has a continuous, groove-like recess which is open towards the top and the side walls thereof surrounding the engaging profiles are elastic, at least in the direction leading towards each other.

Description

Screen panel and screening machine equipped with This screen panel.

The invention relates to a screen panel with screening elements made of plastic material, arranged next to each other other and detachably fixed on steel profiles of a support structure using a separate material profile plastic located between these, presenting the material profile plastic in an upper area and the sieve elements on its sides front facing the profile of plastic material, corresponding coupling parts that are held by drag by means of a fixing element insertable by above in the plastic material profile and presenting the profile of plastic material a lower area that matches the profile of steel. The invention further relates to a screening machine Equipped with this screen panel.

Screen panels of this type are used especially in vibrating screens for coarse screening material. The support structure consists of steel profiles that run longitudinally and / or transversely in the frame of the machine, which are open up, for example, in the form of C profiles, or configured as angular profiles with holes arranged at a distance The plastic screening elements, at least of cast polyurethane resin, they are mounted side by side and / or one behind the other on the upper supporting straps or sides of these steel profiles. Its dimensions are in correspondence with the distances of the steel profiles of the structure of support. Screen elements and their fixing must be designed  so that they can withstand the loads of the screening material and the requests originated during operation, without separate from the support structure. On the other hand, the fixing must be created so that the individual elements sieve, already closed, can be changed without problem. These antagonistic requirements, namely fixing sufficiently stable on the one hand, and easy separability of the elements of sieve on the other hand, have resulted in different constructions known. In addition, it should be ensured that the material of screening does not penetrate between the screening elements or between these and the support structure or in steel profiles, if these are gaps

In a known screen panel (DE3425485A1) is inserted into the open steel profile above the structure of support a separate strip-shaped plastic profile that it presents in its lower zone a continuous base that couples by elastic interlocking in the open steel profile of the support structure, as well as presents in its upper area, to both sides, coupling parts that interact with corresponding coupling parts on the front sides facing the sieve elements. The elements of sieve overlap with its front sides the plastic profile that It is thus covered by sieve elements. On the upper side there is still only a small groove between the front sides of the screening elements. In addition, the plastic material profile presents directly above the base, on both sides, closure strips which rest on the steel profile of the support structure. From This mode ensures efficient profile protection carriers against the entry of screening material, water and similar, but nevertheless the elements of sieve comparatively heavy have to rest on the plastic profile during the mounting. Changing the screening elements also requires considerable forces to separate the trailed interlock of form between the element of sieve and the profile of plastic. In In this case, appropriate or similar tools are needed to lift the heavy sieve elements.

In an embodiment also known (DE19918824A1) are planned, instead of a continuous profile of plastic material, individual fixing pins, being essentially the interaction of the sieve elements with the fixing pin The fixing pin also engages interlocking in open steel profiles above the support structure. This requires an exact positioning of sieve elements during assembly and separation by sections of the pivot screen elements, arranged to distance, during disassembly. In a variant of this panel of sieve is forced into a corresponding hole of fixing pivot passage an expandable mandrel that ensures a better pivot support in the steel profile. Therefore during the assembly must be additionally fixed by impact a plurality of expandable mandrels. These also make it difficult to change individual screening elements.

The two embodiments mentioned Above, they have the advantage that sieve elements have a flat configuration at the top and bottom, which facilitates the emptying of the sieve elements and allows to maintain Low mold costs.

Another well-known screen panel (DE2749489B2) is It consists of sieve elements that on its front sides facing each other have outstanding profiles down, by which these couple on both sides in the open steel profile of the support structure. Between the front sides facing each other of the screening elements there is a groove, into which the force above a wedge strip that penetrates the profile of construction steel and expand out the profiles, formed on the underside of the sieve elements by under the hole of the steel profile of the support structure. In order to change a sieve element, the strip must be removed. cradle. For this purpose, corresponding depressions are foreseen in the surface of the sieve elements, as well as through holes cross in the wedge strip to place a tool traction hook-shaped. In the bucket-shaped depression material accumulates on the upper side of the sieve elements of screening and first you have to empty the bucket and the wedge strip to be able to place the tool in the form of a hook. In addition, the Steel profile of the support structure is protected only from very insufficient way against the entry of screening material or Water.

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Finally, an embodiment with three is known elements (EP0567361B1), in which on the one hand a separate profile plastic coupling on the open steel profile above the support structure and, on the other hand presents in the located area above coupling profiles that interact with profiles of coupling on the opposite sides of the elements of screen. The separate plastic profile has holes, in which mandrels can be fixed again by impact expandable that rest with their head on the upper side of the screening elements. The expandable mandrel couples even in the profile Open steel support structure and expand the area here Bottom base of the steel profile. In this way, the elements of sieve are fixed, on the one hand in the separate profile of steel and this is fixed on the other hand by the mandrel expandable in the steel profile of the support structure. It is disadvantageous that the heads of the expandable mandrels protrude from the sieve surface and that the steel profiles of the support structure have poor protection. Dice that the expandable mandrel has to apply and support both forces in the connection area of the sieve elements such as forces to fix the plastic profile in the structure of support, conveniently high forces must be applied to change individual screening elements, and namely several times due to the plurality of expandable mandrels. In addition, the plastic profiles can be extracted simultaneously unwanted when the sieve elements are lifted.

In another known embodiment (EP0118800) with a separate plastic profile, embedded in the steel profile, the sieve elements rest loosely on side flanges of the plastic profile. The plastic profile presents on the side upper one notch, in which you can forcefully enter a wedge strip and attach by corresponding teeth. The sieve elements are held between a strip head wedge, hat-shaped in cross section, and lateral flanges of the profiled strip. In this case it is necessary also apply great force to separate the wedge strip interlocked and the screening material enters the head of the strip hat-shaped wedge that rests on the sieve elements, so that the screening material accumulates under the head by the effect of vibration.

The invention aims to enable a easier assembly and disassembly of screening elements and avoid, In addition, the access of screening material and / or water to the profiles Steel support structure.

From a screen panel with the characteristics of the preamble of claim 1 (EP0567361B1), this objective is achieved by configuring the material profile plastic as profiled strip, the fixing element as strip of wedge and coupling parts continuously, and when presenting the profiled strip a continuous depression, open upwards and of channel type that houses the wedge strip and whose side walls that enclose the coupling parts are elastic at least in direction to each other, the profiled strip being arranged so embedded in relation to the upper side of the sieve elements, presenting the wedge strip a head part that fills the free space located above the profiled strip and between front sides of the screening elements and ending essentially flush with the upper side of the adjacent elements sieve

Unlike the most current level of technique (EP0567361B1) with individual profiled pivots, arranged to distance, a profiled strip is provided and instead of expandable mandrels, a wedge strip. The wedge strip is responsible only for a drag resistant closure by means of the coupling parts of the profiled strip and the elements sieve while fixing the profiled strip in the Bottom construction is carried out only by the part of base. In this way they are smaller, on the one hand, the forces when inserting the wedge strip, as well as separating it to change the sieve elements.

In comparison with all constructions known advantage is achieved that the sieve elements are They can ride with a very small application of force. These will they move laterally with their coupling part on the part coupling of the profiled strip or placed under pressure by above. To this end, the flexible side walls of the Channel type depression elastically deflect inwards. Only after this previous assembly of the sieve elements, without almost a force application is needed, the final closure is created by dragging between the coupling parts in the screening elements and the strip profiled by the wedge strip, easily and simply insertable, which exclusively generates the forces, which act towards the side, for the drag closure of shape.

When changing a sieve element, you first separate the wedge strip. The force must be applied only in its end and wedge strip can be disassembled then with ease throughout. Screen elements can be lift comfortably, since the profiled strip element directed towards these it elastically deviates inwards.

At this point it should be noted that the term "wedge strip" does not necessarily presuppose a wedge shape, but rather includes any form that allows to place or keep the coupling parts of the strip in position profiled to ensure a drag resistant closure with the coupling parts of the sieve elements. Such effect is sufficient, depending on the circumstances, a simple elastic deformation that also allows a good seal in the upper side of the sieve elements. How depression is closed further down, through this area can not penetrate screening material or water in the steel profiles of the support structure. This is also reinforced by the fact that the profiled strip is arranged in an embedded manner with respect to the upper side of the sieve elements, presenting especially the wedge strip a head part that fills the free space located above the profiled strip and between front sides of the sieve elements. In this way it originates a slightly wider surface in the wedge strip that facilitates the insertion and also allows, even in this area, a elastic deformation in the area of the head part and / or of the sieve elements to achieve a connection without grooves.

It is also provided that the head part of the wedge strip essentially ends flush with the upper side of contiguous screening elements, so that a flat surface of the screen panel.

The profiled strip preferably presents in its lower area a base part that is embedded in the profile of steel support structure.

In a preferred embodiment, the profiled strip presents directly above its base part parts of continuous coverage on both sides that support the profile of steel of the support structure and those mounted above the sieve elements, so that if material went down of screening and / or water between the screening elements, the profiles of Steel are protected at all times.

In a preferred embodiment, the part of coupling presents on the upper side, on both sides of the strip profiled, an input contour for the coupling part conveniently configured in sieve elements. If the entrance contour can be, for example, surfaces oblique, convex or similar surfaces, which have exclusively the function of facilitating placement above Screening elements

Unlike this, the coupling part may be embossed from the bottom on both sides of the profiled strip, which is advantageous for a strong closure by dragging the sieve elements into position mounted. The destalonado does not interfere when the elements of sieve or when changing these, since the wedge strip is introduced to the force or is extracted later, so that when inserted or changing the sieve element can deform the wall of the profiled strip into the depression of channel type.

To fix the wedge strip in its final position, channel type depression of the profiled strip and / or wedge strip they can have interlocking elements on their sides faced. Additionally or instead, type depression channel and / or wedge strip may be profiled so that increase friction, if possible, still deform elastically the profile to increase the adhesion forces between the wedge strip and the profiled strip.

The head part extends conveniently throughout the wedge strip, and may also be provided instead that the head part is interrupted along the wedge strip. The wedge strip and the head part are configured as a single piece in one embodiment advantageous

In a variant the part of profiled strip base have a profile configuration continuous, elastically deformable, in the case of a structure of support with open profiles up tube, box or Similar. If the support structure has the opposite profiles, for example, angular profiles with holes located at distance, the base part of the profiled strip is composed of interlocking pivots conveniently separated.

Depending on the construction of the machine Screening and surface screening are planned in the area lateral elements that ensure a lateral closure with respect to the Screening machine housing or fulfilling functions additional. As in this area, two screening elements of same contour, this connection cannot be made with the elements intended to join the sieve elements together.

For this area of the sieve surface you can be provided, for example, that the side element has a coupling profile corresponding to the screening elements, and a side profile corresponding to the wedge strip, with a section that overlaps the profiled strip in correspondence with the part head of the wedge strip and a section that matches the channel type depression of the profiled strip in correspondence with the wedge strip.

In another embodiment it may be provided that the lateral element present on its side directed towards the element of sieve that a coupling part is to be connected in correspondence with it, a base part that couples elastically in the open steel profile above the support structure, and on this a channel type depression that houses the wedge strip.

The invention also relates to a machine sieve with a screen panel of the type mentioned above.

Brief description of the drawings

The invention is described below by middle of some examples reflected in the drawings. The drawings show:

Fig. 1 a schematic cross section to through the screening panel of a screening machine;

Fig. 2 a plan view from above of an element of the screen panel according to Fig. 1;

Fig. 3 an enlarged cut according to the Fig. 1 in the area of a steel profile of the support structure during assembly;

Fig. 4 a section corresponding to the Fig. 3 after assembly;

Fig. 5 an enlarged cut according to the Fig. 1 in the area of one of the side elements;

Fig. 6 an enlarged section with respect to Fig. 1 in the area of another side element;

Fig. 7 a section corresponding to the Fig. 1 during another assembly of the screening elements;

Fig. 8 a plan view from above of the sieve surface according to Fig. 7;

Fig. 9 an enlarged section with respect to Fig. 7 in the lateral zone and

Fig. 10 a section of a modified form of realization of the profiled strip and the wedge strip.

Best way to put the invention into practice

Screening machine 1 according to Fig. 1 presents a housing 2 and a frame-like support structure from of steel profiles 3 arranged in parallel, which in the example shown of embodiment are configured as tube profiles or of box in the form of horizontal profiles in C and open, by consequently, on its upper side. The support structure has also steel profiles, not shown in the drawing, which run transversely. The panel is supported on the support structure sieve 4, composed of individual sieve elements 5 and lateral elements 6 and 7, also assuming the lateral elements 6, 7 if necessary another function during the screening process.

In the exemplary embodiment according to Fig. 1, the screening elements 5, as shown in Fig. 2, are arranged in the transport direction 8 of the screening material. So, these have an essentially longer length in this direction large than the width Screen elements 5 are set of removable way by its two longitudinal sides in the profiles of 3 steel support structure, while the elements sides 6 and 7 are only held similarly by their sides longitudinal directed towards the sieve elements 5 in the steel profiles 3, and by its outer longitudinal sides on angular profiles 9 in the housing 2 of the screening machine.

In Figs. 3 and 4 can be observed in detail the fixing of the sieve elements 5. The profile steel 3 of the support structure has on its upper side a continuous groove 10 that serves for detachable fixing of the screening elements 5. A strip is provided for fixing profiled 11 which by means of a deformable base part 20 elastically interlocked in slot 10 of the profile of steel 3. The profiled strip 11 has in its upper part parts of coupling 12, 13 running longitudinally and that interact with corresponding coupling parts 14, 15 in the front sides 16, 17 directed towards the profiled strip 11 of the screening elements 5. The profiled strip 11 also has in its upper zone a depression 18 channel type and in the area between the base part 20 and coupling parts 12, 13 parts of coverage 19, 21 protruding on both sides and on both sides of base part 20 rest on top of the steel profile 3 of the support structure and cover the slot 10. Like another fixing element is provided a wedge strip 22 formed by a narrow part 23 and a head part 24.

In the previous assembly, you first enter press the profiled strip 11 with its base part 20 into the groove 10 of the steel profile 3 of the support structure, being compressed first elastically the base part 20 inwards and expanding outward through the slot 10 of the profile of steel 3. At the same time, the coverage parts 19, 21 support on the upper side of the steel profile 3. Next, the sieve element 5 reflected in Fig. 3 moves laterally with its coupling part 14 on the coupling part 12 of the profiled strip 11 or is placed under pressure above elastically deforming the profiled strip 11 in the direction of the depression 18. The adjacent screen element 5 (Fig. 4) is placed at pressure then above, if necessary with a position slightly inclined, the directed wall deviating elastically towards this of the profiled strip 11 towards the depression 18 of type channel. After this previous assembly of the sieve elements 5, the wedge strip 22 is snapped up until its head part 24 fills the clearance above the profiled strip 11 and ends flush with the surface of the screening elements 5. In this case, the narrow part 23 of the strip wedge 22 pushes out the coupling parts 12, 13 and is produces a drag-resistant closure of form with the parts coupling 14, 15 on the front sides of the elements of sieve 5. The previous assembly of sieve elements 5 and the Pressure placement of wedge strip 22 can be performed manually.

For the disassembly of a sieve element 5 it is only necessary to hold the wedge strip 22 by its end, by example, by the upper or lower edge in Fig. 2, and remove it upwards. This can be manually removed after all long. Then it is possible to lift the element without problems Screen 5, elastically deflecting the side directed towards it of the coupling part 13 towards the depression 18.

The profiled strip 11 has on the edges opposites of depression hole 18 protrusions 25 protruding slightly inward and that fit into corresponding depressions 26 between the head part 24 and the narrow part 23. The narrow part 23 may also be provided on its surface of a finish 27 with overmeasure with respect to depression 18, which due to the high friction, if necessary, reinforced by a elastic deformation, supports the entry of wedge strip 22 in the depression 18.

Fig. 5 shows the side element 6 of the screen panel 4 according to Fig. 1, which forms the closure of the side of the edge in the machine housing. This one is essentially provided of the same sieve holes as the sieve elements 5. In the shown example of embodiment, the side element 6 rests on the casing 1 of the machine on an angular profile 9. On the side, directed towards the screen elements 5, the side element 6 is provided with a coupling part 28 in correspondence with the coupling part 13 of the profiled strip 11. The element lateral 6 also presents a depression 29 of channel type in correspondence with depression 18 of the profiled strip 11. By Finally, the side element 6 has a base part 30 which protrudes down and with which the side element 6 is fixed in the groove 10 of the steel profile 3 by expansion elastic Above the base part 30, the side element 6 with a displaced step 31, on the one hand, and an extension 32 strip-shaped, on the other hand, rests on the upper side of the steel profile 3. The side element 6 and the screen element 5 adjacent are fixed again with the wedge strip 22 described before.

The side element 7 according to Fig. 6, which can be configured, for example, as a membrane screen, rest also on an angular profile 9 in the casing 2 of the machine screener On its side directed towards the sieve elements it shows another embodiment for joining. To that end, it is provided the profiled strip 11, described at the beginning, which presents both sides the coupling part 12, 13 and depression 18. In this embodiment, the side element 7, as well as the Screen elements 5 (Figs. 2, 3), has a flat configuration in the upper and lower side. This one presents on its front side, directed towards the screening elements 5 a coupling part 33 in correspondence with the `coupling part of the screening elements and a section 34 that overlaps the profiled strip 11, with a wedge part 35 formed on its lower side that engages in depression 18 of the profiled strip 11. This allows connection of in the same way one of the screening elements 5 described above at side element 7.

Figs. 7 and 8 show another variant of a screening machine, in which the screening elements are arranged transversely with respect to the transport 8 of the material screening. Fixing the screen elements 5 in the profiles of Steel 3 of the support structure is made in the same way analyzed before, namely, by profiled strips 11 and the wedge strips 22. As a closure on the side of the entrance and the exit of the screening material lateral elements are provided 36, of which one is shown on an enlarged scale in Fig. 9. A lateral element 36 of this type has, like the side element 6 according to Fig. 5, a part identified in general with the number 37 and a base part 38 on its front side directed towards the sieve elements. Through the latter, the lateral element 36 is inserted by elastic expansion in the slot 10 of the steel profile 3. The screening element has in addition a depression 29 of channel type to house the wedge strip 22 ending flush with the upper side of the side element 36.

In the exemplary embodiment according to Fig. 10, channel 18 depression is provided in the lower zone of an extension 40. The wedge strip 22 has at the end bottom of the narrow part 23 an interlocking base 41 that it is locked after the wedge strip is pressed into the magnification 40. The head portion 24 of the wedge strip 22 is also provided, but not necessarily, with a chamfer 42 that interacts with a complementary contour to the contour of the chamfer 42 on the front side of the adjacent screen elements (no represented), so that the wedge strip 22 is fixed additionally in the sieve elements and the surface of the head portion 24 of the wedge strip 22 forms, for example, a flat surface with the upper side of the sieve elements or also exceeds the surface of the sieve elements to divert the screening material towards the sieve surface. The elevation 42 can be extended in the last case mentioned to all along the head part 42 of the wedge strip 22 or be configured only by sections with projection with respect to the sieve surface to force the screening material to move transversely with respect to the wedge strip 22. The chamfer 42 may alternatively also be provided in the front sides of the sieve elements and the highlight on the sides directed towards these of the wedge strip 22 or the head part 42 of the wedge strip 22 (not shown). On a screen panel this type, the depression 29 of channel type of the lateral element 6 according to Fig. 5 it is provided with a corresponding extension 40 and / or the wedge strip 35 of the side member 7 according to Fig. 6 is provided with a corresponding base part 41 of interlocking

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Documents mentioned in the description This list of the documents mentioned by the applicant was included exclusively to inform the reader and not It is an integral part of the European patent. This one was made with maximum care, but the European Patent Office does not assume, without However, no liability for possible errors or omissions Patents mentioned in the description

DE 3425485 A1 [0003]

EP 0567361 B1 [0007] [0010] [0011]

DE 19918824 A1 [0004]

EP 0118800 A [0008]

DE 2749489 B2 [0006]

Claims (15)

1. Screen panel (4) with sieve elements (5) of plastic material, arranged side by side and removably fixed to steel profiles (3) of a support structure by means of a separate profile of plastic material ( 11) located between these, having the profile of plastic material (11) in an upper area and the screening elements (5) on its front sides (16, 17) facing the profile of plastic material (11) corresponding coupling parts ( 12, 13; 14, 15) which are dragged in shape by means of a fixing element (22) insertable from above in the plastic material profile (11), the plastic material profile (11) having a lower part that can be coupled to the steel profile (3), characterized in that the plastic material profile is configured as a profiled strip (11), the fixing element as a wedge strip (22) and the coupling parts (12, 13; 14, 15) so continues, and because the profiled strip (11) has a depression ón continuous (18) open upwards in the form of a channel that receives the wedge strip (22) and whose side walls enclose the coupling parts (12, 13; 14, 15) and are elastic in at least one direction against each other, the profiled strip (11) being arranged flush with respect to the upper side of the sieve elements (5), the wedge strip (22) having a head portion (24) which fills the clearance above the profiled strip (11) and between the front sides (16, 17) of the screening elements (5) and which ends essentially flush with the upper side of the elements contiguous sieve (5). 2. Screen panel according to claim 1, characterized in that the profiled strip (11) has in its lower area a base part (20) that is coupled to the steel profile (3) of the support structure. 3. Screen panel according to claims 1 or 2, characterized in that the profiled strip (11) has immediately above its base part (20) continuous cover parts (19, 21) on both sides that rest on the profile of steel (3) and on which support the sieve elements (5). 4. Screen panel according to one of claims 1 to 3, characterized in that the coupling part (12, 13) has on the upper side on both sides of the profiled strip (11) an inlet contour for the coupling part ( 14, 15) conveniently configured in the screening elements (5). 5. Screen panel according to any one of claims 1 to 4, characterized in that the coupling part (12, 13) is offset by the lower part on both sides of the profiled strip (11). 6. Screen panel according to any one of claims 1 to 5, characterized in that the channel-type depression (18) of the profiled strip (11) and / or the wedge strip (22) has interlocking elements (25, 26 ; 40; 41) on their opposite sides. 7. Screen panel according to any one of claims 1 to 6, characterized in that the channel-type depression (18) of the profiled strip (11) and / or the wedge strip (22) have finished facing sides (27) ) so that friction increases. 8. Screen panel according to any one of claims 1 to 7, characterized in that the head part (24) extends along the entire wedge strip (22). 9. Screen panel according to any one of claims 1 to 7, characterized in that the head part (24) is interrupted along the wedge strip (22). 10. Screen panel according to any one of claims 1 to 9, characterized in that the wedge strip (22) and the head part (24) are in one piece. 11. Screen panel according to any one of claims 1 to 10, characterized in that the base part (20) of the profiled strip (11) has a continuous profile configuration, elastically deformable, in the case of a support structure with steel profiles (3) in the form of open profiles of tube, box or the like. 12. Screen panel according to any one of claims 1 to 11, characterized in that in a support structure whose steel profiles have spaced holes the base part (20) of the profiled strip (11) is conveniently composed of interlocking pivots. separated. 13. Screen panel according to any one of claims 1 to 12 with a side element (7) that differs from the screen elements (5) and which is removably fixed on one of its sides to a steel profile ( 3) of the support structure, characterized in that the side element (7) has on this side a coupling part (33) in correspondence with the screen elements (5), and some side parts (34, 35) in correspondence with the wedge strip (22) and with an area (34) that overlaps the profiled strip (11) in correspondence with the head part (24) and an area that engages with the channel-type depression (18) of the profiled strip (11) in correspondence with the wedge strip (22). 14. Screen panel according to any one of claims 1 to 12 with a side element (6) that differs from the screen elements (5) and which is removably fixed on one of its sides to a steel profile ( 3) of the support structure, characterized in that the side element (6) has on this side directed towards the adjacent screen element (5) a gear coupling part (28) corresponding to it, a base part (30 ) which engages with the steel profile (3) of the support structure, and a depression (29) of the channel type that receives the wedge strip (22). 15. Screening machine (1) with a screen panel (4) according to any one of claims 1 to 14.