EP1370373A1 - Siebbeslag und siebmaschine mit einem solchen siebbelag - Google Patents
Siebbeslag und siebmaschine mit einem solchen siebbelagInfo
- Publication number
- EP1370373A1 EP1370373A1 EP02722223A EP02722223A EP1370373A1 EP 1370373 A1 EP1370373 A1 EP 1370373A1 EP 02722223 A EP02722223 A EP 02722223A EP 02722223 A EP02722223 A EP 02722223A EP 1370373 A1 EP1370373 A1 EP 1370373A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- profile
- strip
- screen
- elements
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4645—Screening surfaces built up of modular elements
Definitions
- the invention relates to a screen covering with side-by-side screen elements made of plastic, which are detachably fastened to steel profiles of a supporting structure via a separate plastic profile arranged between them, the plastic profile having corresponding engagement profiles in an upper region and the screen elements on their end faces facing the plastic profile are held in positive engagement by means of a fastening means which can be inserted into the plastic profile from above, and the plastic profile has a lower region which engages in the steel profile. It is also directed to a screening machine with such a screen covering and to a screening and edge element of the same.
- the support structure consists of longitudinal and / or transverse steel profiles in the machine frame, which are open at the top, for example in the form of C-profiles, or are designed as angle profiles with spaced holes.
- the sieve elements made of plastic, usually made of PU cast resin, are placed next to and / or one behind the other on the upper risers or legs of these steel profiles. They correspond in their dimensions the distances between the steel profiles of the supporting structure.
- the sieve elements and their fastening must be designed in such a way that they can absorb the loads on the material to be sieved and the dynamic stresses that occur during operation, without detaching themselves from the supporting structure.
- the attachment must be such that individual, worn screen elements can be replaced without any problems.
- These opposing requirements namely sufficiently stable fastening on the one hand and easy releasability of the sieve elements on the other, have led to different known constructions.
- it should be ensured that the material to be screened does not penetrate between the screen elements or between them and the supporting structure or into the steel profiles, insofar as these are hollow.
- a separate, strip-shaped plastic profile is used in the open steel profile of the supporting structure, which has a continuous foot profile in its lower region, which engages in the open steel profile of the supporting structure, and engages in it
- Upper area has engagement profiles on both sides, which interacts with corresponding engagement profiles on the mutually facing end faces of the screen elements.
- the ends of the sieve elements themselves overlap the plastic profile, which is thus covered by the sieve elements.
- the plastic profile immediately above the foot profile has cover strips on both sides that rest on the steel profile of the supporting structure.
- Both of the aforementioned embodiments have the advantage that the sieve elements are flat on the top and bottom sides, which makes it easier to cast the sieve elements and the molding costs can be kept low.
- Another known sieve covering (DE 27 49 489 B2) consists of sieve elements which have downwardly projecting profiles on their mutually facing end faces, with which they engage on both sides in the open steel profile of the supporting structure. There is a gap between the facing end faces of the sieve elements into which a wedge ledge is driven from above, which penetrates into the steel profile of the supporting structure and thereby spreads the profiles formed on the underside of the sieve elements below the opening of the steel profile of the supporting structure to the outside. To be able to replace a sieve element, the wedge strip must be pulled. For this purpose, corresponding depressions are provided on the surface of the sieve elements and transverse openings on the wedge bar in order to be able to attach a hook-shaped traction tool.
- the material to be screened settles in the trough-shaped recess on the top of the sieve elements and the trough and the wedge strip must first be exposed in order to be able to attach the hook-shaped tool.
- the steel profile of the supporting structure is also only inadequately protected against the ingress of screenings or water.
- a three-part design is known (EP 0567361 Bl) is in a separate plastic profile a ⁇ hand engages the upwardly open steel profile of the supporting structure on the other hand it has, in the region of engagement profiles, which cooperate with corresponding engaging profiles on the facing end sides of the screen elements ,
- the separate plastic profile has through holes, into which expansion mandrels can be driven, which sit with their heads on the top of the sieve elements.
- the expanding mandrel reaches into the open steel profile of the supporting structure and spreads out the lower foot area of the steel profile there. In this way, the sieve elements are attached to the separate steel profile on the one hand, and the other to the steel profile of the supporting structure via the expanding mandrel.
- a disadvantage is the protrusion of the heads of the expanding mandrels above the sieve surface and the poor protection of the steel profiles of the supporting structure. Since the expanding mandrel both the forces in the connection area of the sieve elements and the forces for fastening the Apply plastic profile to the support structure and must be applied for the exchange of individual sieve elements correspondingly high forces, several times due to the large number of expanding mandrels. The plastic profiles can also be pulled out unintentionally when the sieve elements are lifted out.
- the sieve elements lie loosely on the side flanges of the plastic profile.
- the plastic profile has a recess on the top, into which a wedge strip can be driven and can be snapped in via corresponding toothings.
- the sieve elements are held clampingly between a head of the wedge strip, which is hat-shaped in cross section, and the side flanges of the profile strip.
- releasing the latched wedge strip is forceful and the hat-shaped head of the wedge strip resting on the sieve elements is infiltrated by the material to be sieved, so that the material to be sieved builds up under the head due to the vibration.
- the invention has for its object to enable easier assembly and disassembly of the screen elements and also to prevent the access of screenings and / or water to the steel profiles of the supporting structure.
- this object is achieved in that the plastic profile is designed as a profile strip, the fastening means as a wedge strip and the engagement profiles, and that the profile strip is continuous, according to Open at the top, receiving the wedge bar, groove-like recess, the Side walls including engagement profiles are elastically flexible at least in the direction of one another.
- the screen elements can be installed with very little effort. They are either pushed on with their engagement profile on the engagement profile of the profile bar or pressed on from above.
- the resilient side walls of the trough-shaped recess yield elastically inwards. Only after this pre-assembly of the sieve elements, which requires almost no effort, is the final form fit between the engaging profiles on the sieve elements and the profile strip created by the easy and easy-to-use wedge strip, which only generates lateral forces for the form closure.
- the continuous wedge bar When replacing a sieve element, the continuous wedge bar is first loosened. The force only has to be applied at one end and the wedge strip can then be easily removed over the entire length. The sieve elements can be easily lifted out because the part of the profile strip facing them elastically diverts inwards.
- the term "wedge bar” does not necessarily presuppose a wedge shape, but rather encompasses any shape which ensures that the lateral engagement profiles of the profile bar are positioned or held in order to ensure a firm positive fit with the To ensure engagement profiles of the sieve elements. A mere elastic deformation may be sufficient for this, which also ensures a good seal on the upper side of the sieve elements. Since the depression is also closed at the bottom, neither screenings nor water can penetrate to the steel profiles of the supporting structure at this point.
- the profile strip preferably has a foot profile which snaps into the steel profile of the supporting structure in its lower region.
- the profile strip has cover strips, which run continuously on both sides and lie on the steel profile of the supporting structure, directly above its base profile and on which the sieve elements rest from above, so that even if screenings and / or water should penetrate down between the sieve elements, in any case the steel profiles are protected.
- the engagement profile has an inlet contour on the upper side on both sides of the profile strip for the correspondingly designed engagement profile on the sieve elements.
- the inlet contour can be, for example, inclined surfaces, curved surfaces or the like, which only have the function of facilitating the mounting of the sieve elements from above.
- the engagement profile can be undercut on the underside on both sides of the profile strip, which is advantageous for a firm positive fit of the sieve elements in the assembled position. The undercut does not interfere with the insertion of the sieve elements, nor with their replacement, since the wedge strip is only driven in or released beforehand, so that when the sieve element is inserted or exchanged, the wall of the profile strip can deform into the channel-like depression.
- the channel-like depression of the profile strip and / or the wedge strip can have latching means on their sides facing one another. Additionally or instead, the channel-like depression and / or the wedge strip can be profiled to increase friction, the profiling possibly being elastically deformable in order to increase the adhesive forces between the wedge strip and the profile strip.
- the profiled strip is arranged sunk relative to the top of the sieve elements, the wedge strip in particular having a head profile which fills the space above the profiled strip and between the end faces of the sieve elements.
- the head profile of the wedge strip is essentially flush with the top of the adjacent sieve elements, so that there is a flat surface of the sieve covering.
- the head profile of the wedge strip forms a deflector for the material to be screened which overlaps the adjacent screen elements.
- the deflector advantageously has an upwardly tapering, in particular a substantially triangular cross-section, so that the screen material striking the deflector is reflected and transferred to the adjacent sieve elements.
- the deflector of the head profile can either rest tightly with the underside of the sieve elements, or have sealing strips on its longitudinal edges and only rest with the sieve elements with these.
- the head part of the wedge strip above the profiled strip and the sieve elements on their end faces facing the head profile can also have corresponding engagement profiles in order to additionally fix the wedge strip to the sieve elements.
- the head profile expediently extends over the entire length of the wedge strip, but instead it can also be provided that the head profile is interrupted over the length of the wedge strip.
- the wedge strip and the head profile are formed in one piece in an advantageous embodiment.
- the base profile of the profile strip is designed as a continuous, elastically deformable profile.
- the supporting structure has profiles, for example angle profiles, with spaced holes, the foot profile of the profile strip consists of appropriately spaced locking pins.
- elements are provided in the edge area which provide an edge seal with respect to the housing of the screening machine or perform additional functions. Since two screen elements of the same contour do not meet at this point, this connection cannot be realized with the means provided for connecting the screen elements to one another.
- the edge element corresponds to an engagement profile corresponding to the screen elements and an edge profile corresponding to the wedge bar with a section overlapping the profile bar corresponding to the head section of the wedge bar and a section engaging in the channel-like depression of the profile bar the wedge ledge.
- the edge element on its side facing the sieve element to be connected has an engagement profile corresponding to it, a foot profile elastically engaging in the open steel profile of the supporting structure, and above that a channel-like depression receiving the wedge strip.
- the invention also relates to a screening machine with a screen covering of the aforementioned type. It is also directed to a screen and edge element of such a screen covering.
- Fig.l shows a schematic cross section through the screen covering of a screening machine; 2 shows a plan view of part of the screen covering according to FIG. 1;
- FIG. 3 shows an enlarged section according to FIG. 1 in the area of a steel profile of the supporting structure during assembly
- FIG. 4 shows a section corresponding to FIG. 3 after assembly
- FIG. 5 shows an enlarged section according to FIG. 1 in the region of one of the edge elements; 6 shows an enlarged section compared to FIG. 1 in the area of the other edge element;
- FIG. 7 shows a section corresponding to FIG. 1 with a different installation of the sieve elements
- FIG. 8 shows a plan view of the screen surface according to FIG. 7; 9 shows an enlarged section in the edge area compared to FIG. 7;
- FIG. 10 shows a section of a modified embodiment of the profile and the wedge strip
- FIG. 11 shows a section corresponding to FIG. 4 of a modified embodiment of the wedge strip
- FIG. 12 shows a section of an alternative embodiment to FIG. 11.
- the screening machine 1 has a housing 2 and a frame-like support structure made of parallel
- Steel profiles 3, which in the exemplary embodiment shown are designed as tubular or box profiles in the manner of horizontal C-profiles and are consequently open at the top. Furthermore, the support structure has transverse steel profiles, not shown in the drawing.
- the screen elements 5, as shown in FIG. 2 are arranged in the direction of the screen material transport 8. In this direction they therefore have a much greater length than width.
- the sieve elements 5 are detachably attached to the steel profiles 3 of the supporting structure on their two long sides, while the edge elements 6 and 7 are fixed in a similar manner to the steel profiles 3 only on their long sides facing the sieve elements 5 and on their outer long sides on angular profiles 9 Screening machine housing 2 are fixed.
- the attachment of the screen elements 5 can be seen in more detail in FIGS.
- the steel profile 3 of the supporting structure has a continuous slot 10 on its upper side, which is used for the detachable fastening of the sieve elements 5.
- a profile strip 11 is provided, which engages with an elastically deformable foot profile 20 into the slot 10 of the steel profile 3.
- the profile strip 11 has longitudinal engagement profiles 12, 13, which interact with corresponding engagement profiles 14, 15 on the end faces 16, 17 of the sieve elements 5 facing the profile strip 11.
- the profile strip 11 also has a groove-like depression 18 in its upper region and cover strips 19, 21 projecting on both sides in the region between the profile base 20 and the engagement profiles 12, 13, which cover the steel profile 3 of the supporting structure on both sides of the base profile 20 and the slot 10 cover.
- a wedge strip 22 is provided, which is formed from a narrow strip 23 with a head profile 24.
- the wedge strip 22 only needs to be gripped at one end, for example at the upper or lower edge in FIG. 2, and pulled upwards. It can then be pulled out over the entire length by hand.
- the sieve element 5 can then be easily lifted out, the side of the profile strip 13 facing it elastically deflecting into the recess 18.
- the profile strip 11 has on the opposite opening edges of the recess 18 slightly inwardly projecting lugs 25 which engage in corresponding recesses 26 between the head profile 24 and the strip 23.
- the strip 23 can be provided on its surface with a weak profiling 27 with an oversize compared to the recess 18, which supports the bracing of the wedge strip 22 in the recess 18 by increased friction, optionally supported by an elastic deformation.
- the edge element 6 lies on the machine housing 1 on an angular profile 9.
- the edge element 6 is provided with a recessed engagement profile 28, which corresponds to the engagement profile 13 of the profile strip 11.
- the edge element 6 has a groove-like depression 29 corresponding to the depression 18 of the profile strip 11.
- the edge element 6 has a profile foot 30 projecting downwards, with which the edge element 6 is fixed in the slot 10 of the steel profile 3 by elastic spreading. Above the profile foot 30, the edge element 6 lies on the one hand with an offset step 31 and on the other hand a strip-like extension 32 on the top of the steel profile 3.
- the edge element 6 and the adjacent sieve element 5 are in turn fastened with the wedge strip 22 described above.
- the usual profile strip 11 described at the outset is provided, which has the engagement profile 12, 13 and the depression 18 on both sides.
- the edge element 7 - like the sieve elements 5 (FIGS. 2, 3) - is flat on the top and bottom. It has on its front side facing the sieve elements 5 a strip-shaped profile 33 corresponding to the engagement profile of the sieve elements and a section 34 overlapping the profile strip 11 with a wedge strip 35 formed on the underside thereof, which engages in the recess 18 of the profile strip 11. In this way, one of the sieve elements 5 described above can be connected to the edge element 7 in the same way.
- FIG. 7 and 8 show another variant of a screening machine, in which the screening elements are arranged transversely to the screening material conveyor 8. The attachment of the screen elements 5 to the
- edge elements 36 are provided, one of which is shown enlarged in FIG.
- Such an edge element 36 like the edge element 6 according to FIG. 5, has on its front side facing the sieve elements a profile generally designated 37 and a foot profile 38.
- the edge element 36 is inserted in the slot 10 of the steel profile 3 in an elastically spreading manner.
- the sieve element has a groove-like recess 39 for receiving the wedge strip 22, which is flush with the top of the edge element 36.
- the groove-like depression 18 is provided with an extension 40 in the lower region.
- the wedge bar 22 has at the lower end of the bar 23 a locking foot 41, which after pressing in
- the head profile 24 of the wedge strip 22 is provided with a chamfer 42, which cooperates with a projection on the end face of the adjacent sieve elements (not shown) which is complementary to the contour of the chamfer 42, so that the wedge strip 22 additionally is fixed to the screen elements and the surface of the head profile 24 of the wedge strip 22 with the top of the screen elements, for example forms a flat surface or also extends above the surface of the sieve elements in order to deflect the material to be sieved onto the sieve surface.
- the cantilever 42 can run over the entire length of the head profile 42 of the wedge bar 22 or can be formed only in sections with an overhang relative to the sieve surface in order to force the material to be moved to move transversely to the wedge bar 22.
- the chamfer 42 can also be provided on the end faces of the screen elements and the projection on the sides of the wedge strip 22 or the head profile 42 of the wedge strip 22 facing them (not shown).
- the groove-like recess 29 of the edge element 6 according to FIG. 5 is equipped with a corresponding extension 40 and / or the molded-on wedge strip 35 of the edge element 7 according to FIG. 6 is equipped with a corresponding latching foot 41.
- FIG. 11 shows an alternative embodiment of a wedge strip 22, which, in accordance with the wedge strip 22 according to FIG. 10, is equipped with a latching foot 41 which, after the wedge strip 2 has been pressed in, engages in the groove-like depression 18 of the profile strip 11 in its lower extension 40.
- the head profile 24 of the wedge strip 22 according to 11 is arranged with an overhang opposite the top of the adjacent screen elements 5 and forms a deflector 50 for the material to be screened in order to reflect it onto the screen elements.
- the deflector 50 has a cross section which tapers upwards and which, in the present exemplary embodiment, has a triangular shape.
- the cross section of the deflector 50 can alternatively also be, for example, trapezoidal (FIG.
- the head profile 24 can extend over the entire length of the wedge strip 22, which is particularly advantageous if the wedge strips are arranged in the direction of the screenings transport 8 (FIGS. 1, 2).
- the deflector 50 of the head profile 24 of the wedge strip 22 has sealing strips 51, 52 which extend along the longitudinal edges of the deflector 50 and lie tightly against the sieve elements 5 in order to ensure that the sieve material 24 does not infiltrate to prevent.
- the head profile 24 of the wedge bar 22 has an engagement profile 53, 54 which corresponds to an engagement profile 55, 56 arranged on the end face of the screen elements, so that a latching connection is formed, by means of which the wedge bar 22 is additionally held on the screen elements 5.
- FIG. 12 differs from the embodiment according to FIG. 11 in that the wedge bar 22 cannot be locked on the screen elements 5, but nevertheless the space above the profile bar 11 between the end faces 16, 17 of the screen elements 5 is entirely fills.
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Dental Preparations (AREA)
- Branching, Merging, And Special Transfer Between Conveyors (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113401 | 2001-03-19 | ||
DE2001113401 DE10113401A1 (de) | 2001-03-19 | 2001-03-19 | Siebbelag |
DE2001122612 DE10122612A1 (de) | 2001-05-10 | 2001-05-10 | Siebbelag |
DE10122612 | 2001-05-10 | ||
PCT/EP2002/002879 WO2002074454A1 (de) | 2001-03-19 | 2002-03-15 | Siebbelag und siebmaschine mit einem solchen siebbelag |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1370373A1 true EP1370373A1 (de) | 2003-12-17 |
EP1370373B1 EP1370373B1 (de) | 2007-07-25 |
Family
ID=26008833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02722223A Expired - Lifetime EP1370373B1 (de) | 2001-03-19 | 2002-03-15 | Siebbelag und siebmaschine mit einem solchen siebbelag |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1370373B1 (de) |
AT (1) | ATE367867T1 (de) |
CZ (1) | CZ303783B6 (de) |
DE (1) | DE50210551D1 (de) |
ES (1) | ES2291462T3 (de) |
PL (1) | PL201581B1 (de) |
WO (1) | WO2002074454A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006030892A1 (de) * | 2006-07-04 | 2008-01-10 | Voith Patent Gmbh | Verfahren zur Herstellung von Sieben sowie dadurch hergestelltes Sieb |
US7861866B1 (en) | 2008-03-07 | 2011-01-04 | Tema Isenmann, Inc. | Screening system with knocking device |
AU2012208984B2 (en) * | 2011-07-26 | 2014-02-13 | Lettela Pty Limited | Screen panel fixing system |
PL3245012T3 (pl) | 2015-01-16 | 2019-07-31 | Sandvik Intellectual Property Ab | Podpora do sit napinanych |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980555A (en) * | 1973-08-24 | 1976-09-14 | Screenex Wire Weaving Manufacturers Limited | Replacable screen with frame |
DE3307916A1 (de) * | 1983-03-05 | 1984-09-06 | Hein, Lehmann AG, 4000 Düsseldorf | Siebbelag mit auswechselbaren siebelementen |
CS246481B1 (cs) * | 1984-04-24 | 1986-10-16 | Josef Smehlik | Třídicí plocha |
DE3425485A1 (de) * | 1984-07-11 | 1986-01-16 | Hein, Lehmann AG, 4000 Düsseldorf | Siebbelag |
ZA883971B (de) * | 1987-09-26 | 1988-12-05 | ||
US5277319A (en) * | 1990-08-06 | 1994-01-11 | Conn-Weld Industries, Inc. | Panel mounting system |
US5112475A (en) * | 1990-08-06 | 1992-05-12 | Conn-Weld Industries, Inc. | Panel mounting system |
FR2690489B1 (fr) * | 1992-04-24 | 1994-12-23 | Giron Holding | Système de fixation de panneaux modulaires de criblage sur une structure de maintien. |
DE4303892C2 (de) * | 1993-02-10 | 2001-07-12 | Ludwig Krieger Draht Und Kunst | Siebbelag |
AUPM888594A0 (en) * | 1994-10-19 | 1994-11-10 | Lettela Proprietary Limited | Screen panel fixing system |
US5755334A (en) * | 1996-03-19 | 1998-05-26 | Illinois Tool Works Inc. | Method and apparatus for mounting a panel on a support member |
AUPO213796A0 (en) * | 1996-09-05 | 1996-09-26 | Lettela Proprietary Limited | Modular screen panel |
-
2002
- 2002-03-15 PL PL363721A patent/PL201581B1/pl unknown
- 2002-03-15 CZ CZ20032482A patent/CZ303783B6/cs not_active IP Right Cessation
- 2002-03-15 WO PCT/EP2002/002879 patent/WO2002074454A1/de active IP Right Grant
- 2002-03-15 AT AT02722223T patent/ATE367867T1/de active
- 2002-03-15 ES ES02722223T patent/ES2291462T3/es not_active Expired - Lifetime
- 2002-03-15 EP EP02722223A patent/EP1370373B1/de not_active Expired - Lifetime
- 2002-03-15 DE DE50210551T patent/DE50210551D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02074454A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1370373B1 (de) | 2007-07-25 |
WO2002074454A1 (de) | 2002-09-26 |
ATE367867T1 (de) | 2007-08-15 |
ES2291462T3 (es) | 2008-03-01 |
PL363721A1 (en) | 2004-11-29 |
CZ303783B6 (cs) | 2013-05-02 |
PL201581B1 (pl) | 2009-04-30 |
DE50210551D1 (de) | 2007-09-06 |
CZ20032482A3 (cs) | 2004-02-18 |
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