EP0277936B1 - Lateral tightening device for screens - Google Patents

Lateral tightening device for screens Download PDF

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Publication number
EP0277936B1
EP0277936B1 EP88890018A EP88890018A EP0277936B1 EP 0277936 B1 EP0277936 B1 EP 0277936B1 EP 88890018 A EP88890018 A EP 88890018A EP 88890018 A EP88890018 A EP 88890018A EP 0277936 B1 EP0277936 B1 EP 0277936B1
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EP
European Patent Office
Prior art keywords
sealing
screen
laminae
lateral seal
screen elements
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.)
Expired - Lifetime
Application number
EP88890018A
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German (de)
French (fr)
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EP0277936A3 (en
EP0277936A2 (en
Inventor
Leander Ahorner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IFE INDUSTRIE-EINRICHTUNGEN FERTIGUNGS-AKTIENGESEL
Original Assignee
IFE Industrie-Einrichtungen Fertigungs-Aktiengesellschaft
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Application filed by IFE Industrie-Einrichtungen Fertigungs-Aktiengesellschaft filed Critical IFE Industrie-Einrichtungen Fertigungs-Aktiengesellschaft
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Publication of EP0277936A3 publication Critical patent/EP0277936A3/en
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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
    • B07B1/48—Stretching devices for screens
    • B07B1/485—Devices for alternately stretching and sagging screening surfaces
    • 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

Definitions

  • the invention relates to a side seal for sieve devices in which the sieve moves relatively to the side walls, preferably for those with a grate that has a plurality of movable grate bars connected by flexible sieve elements attached to them, bridging the gaps between the grate bars are, which are alternately moved or relaxed and relaxed by means of the movable grate bars, the side seal consisting of flexible material being firmly connected on the one hand to the screen elements and on the other hand to frame side parts.
  • a known side seal of this type has pocket-shaped areas which are adapted to the distance between the grate bars. This seal has heavy wear in places, so it is desirable to extend the life of the side seal.
  • guide plates are provided instead of side walls, and the side edges of the screen are sealed on the outside of these guide plates.
  • the ends of the grate bars carry arms projecting upwards, and the sealing elements are tightly connected on the one hand to the sieve and, on the other hand, are fastened to the arms with their vertical edges.
  • These elements have waves, the generatrices of which run perpendicular to the screen surface and, if appropriate, can also additionally have a wave in the longitudinal direction of the screen.
  • the problem solved by the invention does not occur here, namely to create permanent sealing elements which are fastened on the one hand to a side wall and on the other hand to the longitudinal edge of the screen, the screen making a relative movement with respect to the side wall.
  • the side seal consists of a series of overlapping sealing sheets which extend longitudinally between their edges fastened with the screen elements or the frame side parts.
  • the invention further relates to embodiments of this side seal.
  • FIG. 1 shows a cross section through an edge region of the screening device and FIG. 2 shows the sealing sheets after their connection to the screening elements.
  • the side seal 1 is tightly connected on the one hand to the screen elements 2 and on the other hand to a frame side part 3.
  • the seal is preferably glued to the sieve elements; screwed to the frame side parts with the interposition of a strip 4.
  • the side seal consists, as can be seen from FIG. 2, of a series of sealing sheets 5, which are tightly connected with an edge zone 6 to the screen 7 consisting of individual screen elements on its surface.
  • the sealing sheets overlap one another, so that no material can escape laterally when the screen is in the direction of arrow 8 in FIG. 2.
  • the sections are designated 9.
  • a sieve element If a sieve element is tensioned, then the neighboring sieve elements are completely or partially relaxed. There are therefore kinks in the screen surface above the grate bars. Due to the design of the side seal according to the invention, despite the overlapping areas, it is homogeneous with respect to its resistance to deformation over almost the entire length. It is therefore not critical where these overlap areas are arranged in relation to the grate bars. However, it is advisable to choose the same pitch for the side seal as for the screen elements.
  • the size of the overlap in the direction of sieving is to be adapted to the respective material to be sieved and is usually 1/6 to 1/3 of the distance between the grate bars.
  • the invention is not restricted to the exemplary embodiment shown. So the curvature 11 can also be directed outside. It is also possible to attach the sealing sheets 5 on the underside of the sieve elements 2 to these or the grate bars. In the case of highly flexible sealing sheets, the rectangular cutout 9 can be omitted. It is also possible to connect the sealing sheets to one another in the overlap zone, advantageously in a punctiform manner, in order to increase the sealing effect. However, previous attempts have shown that a connection between the sealing sheets, apart from their fastening zones with the screen elements or frame side parts, is not necessary.
  • the seal according to the invention is suitable for all screening devices in which the grate bars move relative to the frame.
  • This movement can be directed perpendicular to the screen surface, so that the screen alternately arches upwards or downwards between the grate bars.
  • the direction of movement of the grate bars can also run parallel to the screen surface.
  • the seal according to the invention can be used with particular advantage where the grate bars perform a circular movement.

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  • Combined Means For Separation Of Solids (AREA)

Description

Die Erfindung bezieht sich auf eine Seitenabdichtung für Siebvorrichtungen, bei denen sich das Sieb zu den Seitenwänden relativ bewegt, vorzugsweise für solche mit einem Rost, der mehrere bewegliche Roststäbe aufweist, die durch an ihnen befestigte, die Spalten zwischen den Roststäben überbrückende, flexible Siebelemente verbunden sind, die mittels der beweglichen Roststäbe abwechselnd bewegt bzw. ge- und entspannt werden, wobei die aus flexiblem Material bestehende Seitenabdichtung einerseits mit den Siebelementen und anderseits mit Rahmenseitenteilen fest verbunden sind.The invention relates to a side seal for sieve devices in which the sieve moves relatively to the side walls, preferably for those with a grate that has a plurality of movable grate bars connected by flexible sieve elements attached to them, bridging the gaps between the grate bars are, which are alternately moved or relaxed and relaxed by means of the movable grate bars, the side seal consisting of flexible material being firmly connected on the one hand to the screen elements and on the other hand to frame side parts.

Eine bekannte Seitenabdichtung dieser Art weist taschenförmige Bereiche auf, die dem Abstand zwischen den Roststäben angepaßt sind. Diese Dichtung weist stellenweise starke Abnützung auf, so daß es wünschenswert ist, die Lebensdauer der Seitendichtung zu verlängern.A known side seal of this type has pocket-shaped areas which are adapted to the distance between the grate bars. This seal has heavy wear in places, so it is desirable to extend the life of the side seal.

Bei Siebeinrichtungen, bei denen das Sieb mit den Seitenwänden fest verbunden ist, wie z.B. die SU-A-1113185 und SU-A-1114481 zeigen, besteht das erfindungsgemäße Problem nicht, so daß diese Druckschriften keine Anregung zur Lösung des Problems geben.For screening devices in which the screen is firmly connected to the side walls, e.g. SU-A-1113185 and SU-A-1114481 show that the problem according to the invention does not exist, so that these publications give no suggestion for solving the problem.

Bei einer anderen Gattung von Siebmaschinen DE-A-2108924 sind anstelle von Seitenwänden Leitbleche vorgesehen und die Abdichtung der Seitenränder des Siebes erfolgt auf der Außenseite dieser Leitbleche. Zu diesem Zweck tragen die Enden der Roststäbe nach oben ragende Arme, und die Dichtelemente sind einerseits mit dem Sieb dicht verbunden und andererseits mit ihren senkrechten Rändern an den Armen befestigt.In another type of screening machine DE-A-2108924, guide plates are provided instead of side walls, and the side edges of the screen are sealed on the outside of these guide plates. For this purpose, the ends of the grate bars carry arms projecting upwards, and the sealing elements are tightly connected on the one hand to the sieve and, on the other hand, are fastened to the arms with their vertical edges.

Diese Elemente weisen Wellen auf, deren Erzeugende senkrecht zur Siebfläche verlaufen und gegebenenfalls auch zusätzlich eine Welle in der Längsrichtung des Siebes aufweisen können.These elements have waves, the generatrices of which run perpendicular to the screen surface and, if appropriate, can also additionally have a wave in the longitudinal direction of the screen.

Das durch die Erfindung gelöste Problem tritt hierbei nicht auf, nämlich dauerhafte Dichtelemente zu schaffen, die einerseits an einer Seitenwand und andererseits am Längsrand des Siebes befestigt sind, wobei das Sieb gegenüber der Seitenwand eine Relativbewegung ausführt.The problem solved by the invention does not occur here, namely to create permanent sealing elements which are fastened on the one hand to a side wall and on the other hand to the longitudinal edge of the screen, the screen making a relative movement with respect to the side wall.

Das angestrebte Ziel wird erfindungsgemäß dadurch erreicht, daß die Seitenabdichtung aus einer Reihe einander schuppenartig überlappender Dichtblätter besteht, die zwischen ihren,mit den Siebelementen bzw. den Rahmenseitenteilen befestigten Rändern längsgewölbt verlaufen. Die Erfindung bezieht sich ferner auf Ausgestaltungen dieser Seitenabdichtung.The desired goal is achieved according to the invention in that the side seal consists of a series of overlapping sealing sheets which extend longitudinally between their edges fastened with the screen elements or the frame side parts. The invention further relates to embodiments of this side seal.

In der Zeichnung ist der Gegenstand der Erfindung in einer beispielsweisen Ausführungsform dargestellt. Es zeigen Fig. 1 einen Querschnitt durch einen Randbereich der Siebvorrichtung und Fig. 2 die Dichtblätter nach ihrer Verbindung mit den Siebelementen.In the drawing, the subject matter of the invention is shown in an exemplary embodiment. 1 shows a cross section through an edge region of the screening device and FIG. 2 shows the sealing sheets after their connection to the screening elements.

Die Seitenabdichtung 1 ist einerseits mit den Siebelementen 2 und anderseits mit einem Rahmenseitenteil 3 dicht verbunden. Vorzugsweise wird die Dichtung mit den Siebelementen verklebt; mit den Rahmenseitenteilen jedoch unter Zwischenschaltung einer Leiste 4 verschraubt.The side seal 1 is tightly connected on the one hand to the screen elements 2 and on the other hand to a frame side part 3. The seal is preferably glued to the sieve elements; screwed to the frame side parts with the interposition of a strip 4.

Die Seitenabdichtung besteht, wie aus Fig. 2 ersichtlich ist, aus einer Reihe von Dichtblättern 5, die mit einer Randzone 6 mit dem aus einzelnen Siebelementen bestehenden Sieb 7 an dessen Oberfläche dicht verbunden sind. Die Dichtblätter überlappen einander, so daß bei einer Siebrichtung gemäß dem Pfeil 8 in Fig. 2 kein Material seitlich austreten kann. Zur Erhöhung der Flexibilität und zur Verringerung einer Dämpfung der Schwingbewegung der Siebelemente ist es zweckmäßig, die Dichtblätter 5 im Bereich der Befestigungszone 6 rechteckig auszuschneiden. Die Ausschnitte sind mit 9 bezeichnet.The side seal consists, as can be seen from FIG. 2, of a series of sealing sheets 5, which are tightly connected with an edge zone 6 to the screen 7 consisting of individual screen elements on its surface. The sealing sheets overlap one another, so that no material can escape laterally when the screen is in the direction of arrow 8 in FIG. 2. In order to increase flexibility and to reduce damping of the oscillating movement of the screen elements, it is expedient to cut the sealing sheets 5 rectangular in the area of the fastening zone 6. The sections are designated 9.

Zum Befestigen des Randes 10 der Dichtblätter 5 werden diese gemäß Fig. 1 aufgerichtet und mit den Bereichen 10 am Rahmenseitenteil 3 dicht befestigt. Hiebei bildet sich eine Längswölbung 11 aus, die ein freies Schwingen der Siebelemente 2 zuläßt.To fasten the edge 10 of the sealing sheets 5, these are erected according to FIG. 1 and tightly attached to the areas 10 on the frame side part 3. A longitudinal curvature 11 is formed, which allows the sieve elements 2 to freely swing.

Ist ein Siebelement gespannt, dann sind die benachbarten Siebelemente ganz oder teilweise entspannt. Es ergeben sich daher über den Roststäben Knickstellen in der Siebfläche. Durch die erfindungsgemäße Ausbildung der Seitenabdichtung ist diese trotz der Überlappungsbereiche nahezu über die gesamte Länge homogen bezüglich ihres Verformungswiderstandes. Es ist daher nicht kritisch, wo diese Überlappungsbereiche im Bezug auf die Roststäbe angeordnet werden. Es ist jedoch zweckmäßig, für die Seitenabdichtung die gleiche Teilung zu wählen wie für die Siebelemente. Die Größe der Überlappung in Siebrichtung ist dem jeweiligen Siebgut anzupassen und beträgt in der Regel 1/6 bis 1/3 des Abstandes der Roststäbe.If a sieve element is tensioned, then the neighboring sieve elements are completely or partially relaxed. There are therefore kinks in the screen surface above the grate bars. Due to the design of the side seal according to the invention, despite the overlapping areas, it is homogeneous with respect to its resistance to deformation over almost the entire length. It is therefore not critical where these overlap areas are arranged in relation to the grate bars. However, it is advisable to choose the same pitch for the side seal as for the screen elements. The size of the overlap in the direction of sieving is to be adapted to the respective material to be sieved and is usually 1/6 to 1/3 of the distance between the grate bars.

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt. So kann die Wölbung 11 auch nach außen gerichtet sein. Ebenso ist es möglich, die Dichtblätter 5 an der Unterseite der Siebelemente 2 an diesen bzw. den Roststäben zu befestigen. Bei hochflexiblen Dichtblättern kann der Rechteckausschnitt 9 entfallen. Auch ist es möglich, die Dichtblätter in der Überlappungszone miteinander, vorteilhafterweise punktförmig zu verbinden, um die Dichtwirkung zu erhöhen. Die bisherigen Versuche haben jedoch gezeigt, daß eine Verbindung zwischen den Dichtblättern, abgesehen von ihren Befestigungszonen mit den Siebelementen bzw. Rahmenseitenteilen, nicht erforderlich ist. Die erfindungsgemäße Dichtung eignet sich für alle Siebvorrichtungen, bei denen die Roststäbe gegenüber den Rahmen eine Bewegung ausführen. Diese Bewegung kann senkrecht zur Siebfläche gerichtet sein, so daß sich das Sieb abwechselnd zwischen den Roststäben nach oben oder unten durchwölbt. Die Richtung der Bewegung der Roststäbe kann auch parallel zur Siebfläche verlaufen. Die erfindungsgemäße Dichtung ist jedoch mit besonderem Vorteil dort anzuwenden, wo die Roststäbe eine kreisende Bewegung ausführen.The invention is not restricted to the exemplary embodiment shown. So the curvature 11 can also be directed outside. It is also possible to attach the sealing sheets 5 on the underside of the sieve elements 2 to these or the grate bars. In the case of highly flexible sealing sheets, the rectangular cutout 9 can be omitted. It is also possible to connect the sealing sheets to one another in the overlap zone, advantageously in a punctiform manner, in order to increase the sealing effect. However, previous attempts have shown that a connection between the sealing sheets, apart from their fastening zones with the screen elements or frame side parts, is not necessary. The seal according to the invention is suitable for all screening devices in which the grate bars move relative to the frame. This movement can be directed perpendicular to the screen surface, so that the screen alternately arches upwards or downwards between the grate bars. The direction of movement of the grate bars can also run parallel to the screen surface. However, the seal according to the invention can be used with particular advantage where the grate bars perform a circular movement.

Claims (6)

1. A lateral seal for screening devices, in which the screen moves relatively to the side walls, preferably for screens having a grating comprising a plurality of movable bars connected by means of flexible screen elements (2) which are fixed to said bars, bridge the gaps between the bars, and are alternately moved or tensioned and relieved of tension by means of the movable bars, the lateral seal which consists of flexible material being rigidly connected, on the one hand, to the screen elements and, on the other hand, to frame side parts (3), characterised in that it consists of a series of sealing laminae (5) which overlap one another after the style of scales and which extend with a longitudinal curvature between their edges (6, 10) connected to the screen elements (2) and to the frame side parts (3).
2. A lateral seal according to claim 1, characterised in that the sealing laminae (5) have corner cut-outs (9) in the zone (6) where they are connected to the screen elements (2), the width of said corner cut-outs (9) corresponding to the fixing zone and their length corresponding to the overlap zone.
3. A lateral seal according to claim 1 or 2, characterised in that the sealing laminae (5) are connected to the screen elements (2) at the surface thereof.
4. A lateral seal according to claim to claim 1, 2 or 3, characterised in that the connection between the sealing laminae (5) and the screen elements (2) is glued.
5. A lateral seal according to any one of claims I to 4, characterised in that the overlap zone of the sealing laminae (5) in the screen direction (8) is equal to 1/6 to 1/3 of the distance between the grating bars.
6. A lateral seal according to any one of claims 1 to 5 characterised in that the overlap zones of the sealing laminae (5) between the zones (6, 10) where they are fixed to the screen elements (2) and to the frame side parts (3) are not interconnected.
EP88890018A 1987-02-05 1988-01-28 Lateral tightening device for screens Expired - Lifetime EP0277936B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT24187A AT386969B (en) 1987-02-05 1987-02-05 SIDE SEAL FOR SCREENING DEVICES
AT241/87 1987-02-05

Publications (3)

Publication Number Publication Date
EP0277936A2 EP0277936A2 (en) 1988-08-10
EP0277936A3 EP0277936A3 (en) 1988-11-02
EP0277936B1 true EP0277936B1 (en) 1991-03-27

Family

ID=3485301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88890018A Expired - Lifetime EP0277936B1 (en) 1987-02-05 1988-01-28 Lateral tightening device for screens

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EP (1) EP0277936B1 (en)
AT (1) AT386969B (en)
DE (1) DE3862121D1 (en)
HU (1) HU200289B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315227U1 (en) * 1993-10-08 1994-01-05 Ife Gmbh Side seal for screening devices
US7654394B2 (en) * 2004-06-14 2010-02-02 Action Equipment Company, Inc. Flexible mat screening or conveying apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209777A2 (en) * 1985-07-26 1987-01-28 Hein, Lehmann Trenn- und Fördertechnik GmbH Sealing device for a screening machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275339B (en) * 1967-07-13 1968-08-14 Albert Wehner Sieving machine
DE2108924A1 (en) * 1971-02-25 1972-09-07 Wehner, Albert, 7881 Wieladingen Flexible sieve edge seal - of bellows type wall prevents edge spillage
DE2813630A1 (en) * 1978-03-30 1979-10-04 Hein Lehmann Ag SIDE SEAL FOR A SCREENING MACHINE
SU1113185A1 (en) * 1983-04-26 1984-09-15 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Льна Friction plate sieve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209777A2 (en) * 1985-07-26 1987-01-28 Hein, Lehmann Trenn- und Fördertechnik GmbH Sealing device for a screening machine

Also Published As

Publication number Publication date
AT386969B (en) 1988-11-10
EP0277936A3 (en) 1988-11-02
DE3862121D1 (en) 1991-05-02
HU200289B (en) 1990-05-28
HUT45705A (en) 1988-08-29
EP0277936A2 (en) 1988-08-10
ATA24187A (en) 1988-04-15

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