EP0036858B1 - Sifter plate - Google Patents

Sifter plate Download PDF

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Publication number
EP0036858B1
EP0036858B1 EP80901265A EP80901265A EP0036858B1 EP 0036858 B1 EP0036858 B1 EP 0036858B1 EP 80901265 A EP80901265 A EP 80901265A EP 80901265 A EP80901265 A EP 80901265A EP 0036858 B1 EP0036858 B1 EP 0036858B1
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EP
European Patent Office
Prior art keywords
screen
deck according
support structure
sieve
spacer elements
Prior art date
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Expired
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EP80901265A
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German (de)
French (fr)
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EP0036858A1 (en
Inventor
Kurt Wolff
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Steinhaus GmbH
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Steinhaus GmbH
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    • 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 deck for screening machines, trays or the like, consisting of a supporting structure and releasably fastened thereon, with a plurality of individual screen components provided with screen openings, which complement each other to form a continuous separating surface and have the shape of a polygon in plan.
  • a screen deck of this type is known (DE-A-2 632 511), in which the substantially square screen components are not only fastened to the supporting structure at their four corners, but directly with opposite longitudinal sides on parallel struts forming the supporting structure lie on.
  • the edges of the sieve elements overlap the struts of the supporting structure and are therefore supported along the entire length of their long side.
  • the known embodiment suffers from the disadvantage that the screen elements cannot have any screen openings in the area of their longitudinal edges resting on the support struts, which limits the effective, open screen area.
  • the struts of the support structure must be adapted to the support sides of the screen components both in their course and in their dimensions. A predetermined width of the support struts of the support structure cannot therefore be undershot, as a result of which the material expenditure for the support structure cannot be further reduced in the known design.
  • a sieve tray is already part of the state of the art, the sieve components of which can be supported on spacers on trusses of the sieving machine (GB-A-1 107049).
  • This known sieve plate does not provide any information for increasing the effective, open sieve area in the case of a sieve plate that has a large number of sieve components.
  • the sieve bottom is continuously supported in the longitudinal direction of the machine by the fastening profiles serving as spacer elements.
  • the invention achieves the task of achieving a larger, effectively effective, open screen area of the entire screen components.
  • the support of the sieve components only in the area of the corners thereof enables the effective effective open sieve area to be enlarged, the sieve openings being able to reach to the edge of the individual sieve components or even beyond.
  • the support structure which is offset from the underside of the sieve components at a distance from the bottom, does not impede the passage of the screenings, even in the area of those screen openings which, viewed in the direction of fall of the screenings, lie above the individual struts of the support structure.
  • the struts of the supporting structure can have a streamlined shape on their upper side and / or can be provided with a wear protection layer.
  • the spacer elements can either be firmly attached to the sieve components or can be designed as separate components that can be inserted between the sieve components and the supporting structure. It is also possible to arrange the spacer elements firmly on the supporting structure.
  • the spacer elements can advantageously be formed by bearing blocks on the supporting structure.
  • the aerodynamic shape of the support structure can be formed by inclined or convexly curved upper sides of the struts.
  • the tops of the struts can have a gable roof shape.
  • the sieve components are advantageously fixed directly in the receiving openings of the spacer elements by means of lugs on the corner and / or by means of locking pins.
  • the sieve components consist of elastic solid material with fully or partially embedded reinforcement. It is also advantageous if the sieve components have circumferential sealing lips on lateral abutting surfaces.
  • Each individual sieve element has the basic shape of a regular polygon and, in a preferred embodiment, the shape of a square, as shown in the drawing. It is important that not only the attachment but also the support of the individual sieve components only takes place in the area of the corners of the respective polygon, that is to say in the area of the four corners with a square basic shape. If the sieve components have a larger number of corners, the support of the individual sieve components can also be provided only at some of these corners. It is thus possible to attach and support a hexagonal or octagonal sieve component only in the area of every second corner.
  • the sieve components 1 are essentially composed of edge webs 2 and intersecting inner webs 3, which enclose sieve openings 4.
  • the screen openings 4 have the same basic shape as the screen component 1 itself, but they can also have a different shape, in particular a slot or slot shape.
  • the sieve components 1 have lugs 6 on the underside, which project downward beyond the lower boundary surface of the sieve components 1. With these undersides 6 on the underside, the sieve components 1 are fastened to an underlying support structure 7, the connection of the sieve components 1 to the support structure 7 via spacer elements 8. These spacer elements 8 provide a distance “A” between the underside of the sieve components 1 and the top of the supporting structure 7. The sieve components 1 can also be fastened to the spacer elements 8 differently than via the lugs 6.
  • the support structure 7 consists of tubular support struts onto which bearing blocks 9 are placed as spacer elements 8 in the region of the adjacent corners 5 of the sieve components 1.
  • bearing blocks 9 have on their upper side one or more receiving openings 10, into which the undersides 6 of the sieve components 1 are inserted and fixed therein.
  • all the lugs 6 engage in the area of the abutting corners of adjacent sieve components 1 in a common receiving opening 10 of the spacer elements 8.
  • the lugs 6 of the sieve components 1 have the shape of a quarter cylinder or quarter cylinder tube, so that the square basic shape of the Sieve components 1 complement the four adjoining lugs 6 at the adjacent corners 5 of the sieve components 1 to form a full cylinder or full cylinder tube engaging in the receiving opening 10 of the respective bearing block 9.
  • the corner-side lugs 6 of the sieve components 1 can be fixed in the receiving openings 10 of the bearing blocks 9 either via a push-button-like design or via additional expansion pins to be used.
  • the struts of the support structure 7 can also be arranged diagonally to the sieve components 1.
  • 3 and 4 show sieve components 1 for a sieve deck according to the invention, to which the spacer elements 8 on the underside are formed directly in the form of protruding spacer feet 11.
  • the height of the spacer feet 11 determines the distance “A” between the underside of the sieve components 1 and the top of the support structure 7 of the sieve deck.
  • the spacer feet 11 are designed as quarter-tube sleeves and carry spreading tabs 12 at their lower end, with which they are inserted through fastening openings 15 on the upper side of the relevant struts of the supporting structure 7.
  • a fastening pin 13 is inserted, which expands the spreading tabs 12 and thus holds the sieve components 1 to the supporting structure 7.
  • FIG. 5 shows a further embodiment of a screen deck according to the invention, in which the screen components 1 are connected to the supporting structure 7 via spacer elements 8 designed as separate components 16.
  • the fastening of the sieve components 1, which project downwards, on the corner-side lugs 6 to the spacer components 16, can be carried out in the same way as the securing of the sieve components 1 with firmly formed spacer elements 8 according to FIG. 3.
  • the lugs themselves form the spreading tabs 12 with their free ends and receive the fastening pin 13 in the through opening formed by the addition.
  • the separate spacer components 16 have a corresponding receiving opening 17 on the top, through which the lugs 6 of the sieve components 1 are inserted.
  • the attachment of the spacer components 16 on the underlying support structure 7 can take place via underside molded-on locking heads 18, which are buttoned into corresponding fastening openings 19 of the support structure 7.
  • the spacer components 16 expediently consist of an elastic material, such as in particular plastic, from which the sieve components 1 are preferably also produced.
  • the fastening pins 13 can consist of the same plastic material.
  • FIG. 6 shows an embodiment of a screen cover according to the invention, in which the spacer elements 8 are seated on the supporting structure 7 in a frame-fixed manner.
  • the peculiarity of the supporting structure 7 used here is that its struts 20 are formed from an upright square profile.
  • a saddle roof-shaped bevel of the upper sides 21 of the struts 20 of the supporting structure 7 is thus achieved in order to facilitate sliding of the screened material from the struts 20.
  • the wear on the supporting structure by the screenings is reduced to a minimum, on the other hand, this measure also prevents the screenings from being deposited on the upper side of the supporting structure 7.
  • FIG. 7 shows further cross-sectional shapes for the struts of the supporting structure 7, with which these advantages are achieved.
  • FIG. 7a shows again the square cross-sectional profile for the struts 20 with top surfaces 21 which are slanted in the form of a gable roof.
  • Fig. 7b also shows a strut 22 with a saddle roof-shaped sloping tops 21, but this is achieved here in that an angle rail is placed on the top of a flat lying square profile.
  • 7c shows a strut 23 which has a cylindrical tubular cross-sectional profile with a curved upper side 24. In the same way, the strut 25 shown in FIG.
  • the screen components 1 are only point-supported at their corners, there is a risk that free gaps can form downward between the side abutting surfaces 26 of the adjacent screen components 1, through which screenings can pass.
  • the sieve components 1 can have at least one circumferential sealing lip 27 along their lateral abutting surfaces 26, which is illustrated in FIG. 8.
  • Fig. 9 shows a screen component as it is preferably used for a screen deck of the type according to the invention. It consists of an elastic solid material that is reinforced by an embedded reinforcement 28, 29.
  • the reinforcement is divided into an outer circumferential ring reinforcement 28 located in the area of the edge webs 2, which essentially extends between the support corners 5 of the sieve components 1.
  • This ring reinforcement 28 is supplemented by a cross-shaped reinforcement 29, which is arranged in the direction of the transverse and longitudinal center of the sieve components 1.
  • Both the outer reinforcement 28 and the inner, crossing reinforcement 29 can be completely or partially embedded in the elastic solid material of the sieve components 1.
  • the sieve components 1 consist of elastic solid material with an outer, annular reinforcement 28, which extends between the support corners 5 of the sieve components 1.
  • the reinforcement 28 is offset somewhat inwards so that half, outwardly opening sieve openings 30 can be formed along the edges of the sieve components 1, which, as shown in FIG. 10, coincide with the peripheral, half sieve openings 30 of adjacent sieve components 1 complete to full sieve openings. This results in a screen surface with a uniform grid for the screen openings, which extends over all screen components 1.
  • the same effect can also be achieved if the edge webs 2 of the sieve components 1 are made half as wide as the inner webs 3.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

The plate and edges or similar of sifters may be arranged so as to move on the carrying frame (7). They may be comprised of parts (8) provided with a plurality of sifting openings. These sifting parts or elements complete themselves along a traversing separation surface. They are fixed to the carrying structure only in the region of some or their angles. To obtain a large open sifting surface having a high efficiency, the parts are not arranged in the conventional way with the edges thereof on the carrying frame but only in the region of their fixing angles, at a distance from the carrying frame, supported by the frame and connected to it by struts. Thus, the effective sifting surface, formed by the sifting opening, may extend to the edge of each part or element or even go beyond. The carrying frame does not prevent anymore the passage of the material to be sifted.

Description

Die Erfindung bezieht sich auf ein Siebdeck für Siebmaschinen, -horden oder dergleichen, bestehend aus einer Tragkonstruktion und darauf lösbar befestigten, mit einer Vielzahl von mit Sieböffnungen versehenen einzelnen Siebbauteilen, die sich zu einer durchgehenden Trennfläche ergänzen und im Grundriß die Gestalt eines Vielecks haben.The invention relates to a screen deck for screening machines, trays or the like, consisting of a supporting structure and releasably fastened thereon, with a plurality of individual screen components provided with screen openings, which complement each other to form a continuous separating surface and have the shape of a polygon in plan.

Es ist ein Siebdeck dieser Art bekannt (DE-A-2 632 511), bei dem die im wesentlichen quadratischen Siebbauteile nicht nur jeweils an ihren vier Ecken an der Tragkonstruktion befestigt sind, sondern mit einander gegenüberliegenden Längsseiten auf parallelen, die Tragkonstruktion bildenden Streben unmittelbar aufliegen. Dabei übergreifen die Siebelemente mit ihren Rändern die Streben der Tragkonstruktion und sind daher auf der ganzen Länge ihrer Längsseite unterstützt. Der bekannten Ausführung haftet der Nachteil an, daß die Siebelemente im Bereich ihrer auf den Tragstreben aufliegenden Längsränder keine Sieböffnungen haben können, wodurch die effektiv wirksame, offene Siebfläche begrenzt wird. Außerdem müssen die Streben der Tragkonstruktion sowohl in ihrem Verlauf als auch in ihren Abmessungen an die Auflagerseiten der Siebbauteile angepaßt sein. Eine vorgegebene Breite der Tragstreben der Tragkonstruktion kann deshalb nicht unterschritten werden, wodurch bei der bekannten Ausbildung der Materialaufwand für die Tragkonstruktion nicht weiter verringert werden kann.A screen deck of this type is known (DE-A-2 632 511), in which the substantially square screen components are not only fastened to the supporting structure at their four corners, but directly with opposite longitudinal sides on parallel struts forming the supporting structure lie on. The edges of the sieve elements overlap the struts of the supporting structure and are therefore supported along the entire length of their long side. The known embodiment suffers from the disadvantage that the screen elements cannot have any screen openings in the area of their longitudinal edges resting on the support struts, which limits the effective, open screen area. In addition, the struts of the support structure must be adapted to the support sides of the screen components both in their course and in their dimensions. A predetermined width of the support struts of the support structure cannot therefore be undershot, as a result of which the material expenditure for the support structure cannot be further reduced in the known design.

Es gehört auch schon ein Siebboden zum Stand der Technik, dessen Siebbauteile über Distanzelemente auf Traversen der Siebmaschine aufgelagert werden können (GB-A-1 107049). Für eine Vergrößerung der effektiv wirksamen, offenen Siebfläche bei einem Siebboden, der eine Vielzahl von Siebbauteilen besitzt, gibt dieser bekannte Siebboden keine Hinweise. Das gleiche gilt für ein weiter bekanntes Siebmaschinen-Siebdeck (GB-A-1 520 886), das eine übliche Unterkonstruktion mit Befestigungsprofilen hat, die auf Traversen der Siebmaschine sitzen. Der Siebboden ist hier in Längsrichtung der Maschine durch die als Distanzelemente dienenden Befestigungsprofile durchgehend unterstützt.A sieve tray is already part of the state of the art, the sieve components of which can be supported on spacers on trusses of the sieving machine (GB-A-1 107049). This known sieve plate does not provide any information for increasing the effective, open sieve area in the case of a sieve plate that has a large number of sieve components. The same applies to a further known screening machine screen deck (GB-A-1 520 886), which has a customary substructure with fastening profiles which sit on cross members of the screening machine. The sieve bottom is continuously supported in the longitudinal direction of the machine by the fastening profiles serving as spacer elements.

Ausgehend von einem Siebdeck der eingangs genannten Art löst die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, die Aufgabe, eine größere effektiv wirksame, offene Siebfläche der gesamten Siebbauteile zu erzielen.Starting from a screen deck of the type mentioned in the introduction, the invention, as characterized in the claims, achieves the task of achieving a larger, effectively effective, open screen area of the entire screen components.

Die durch die Erfindung erreichten Vorteile liegen darin, daß die Auflagerung der Siebbauteile lediglich im Bereich deren Ecken eine Vergrößerung der effektiv wirksamen, offenen Siebfläche ermöglicht, wobei die Sieböffnungen bis zum Rand der einzelnen Siebbauteile oder sogar darüber hinwegreichen können. Durch die von der Unterseite der Siebbauteile in Abstand nach unten versetzte Tragkonstruktion wird der Durchtritt des Siebgutes auch im Bereich derjenigen Sieböffnungen nicht behindert, die in Durchfallrichtung des Siebgutes gesehen über den einzelnen Streben der Tragkonstruktion liegen. Um einer abrasiven Wirkung durch das Siebgut vorzubeugen, können die Streben der Tragkonstruktion an ihrer Oberseite eine strömungsgünstige Gestalt haben und/oder mit einer Schleißschutzschicht versehen sein.The advantages achieved by the invention are that the support of the sieve components only in the area of the corners thereof enables the effective effective open sieve area to be enlarged, the sieve openings being able to reach to the edge of the individual sieve components or even beyond. The support structure, which is offset from the underside of the sieve components at a distance from the bottom, does not impede the passage of the screenings, even in the area of those screen openings which, viewed in the direction of fall of the screenings, lie above the individual struts of the support structure. In order to prevent an abrasive effect from the material to be screened, the struts of the supporting structure can have a streamlined shape on their upper side and / or can be provided with a wear protection layer.

In Ausgestaltung der Erfindung können die Distanzelemente entweder an den Siebbauteilen fest angearbeitet oder als separate, zwischen die Siebbauteile und die Tragkonstruktion einfügbare Bauteile ausgebildet sein. Es ist auch möglich, die Distanzelemente fest an der Tragkonstruktion anzuordnen. Dabei können vorteilhaft die Distanzelemente durch Auflagerböckchen auf der Tragkonstruktion gebildet sein.In an embodiment of the invention, the spacer elements can either be firmly attached to the sieve components or can be designed as separate components that can be inserted between the sieve components and the supporting structure. It is also possible to arrange the spacer elements firmly on the supporting structure. The spacer elements can advantageously be formed by bearing blocks on the supporting structure.

Die strömungsgünstige Gestalt der Tragkonstruktion kann durch geneigte oder konvex gewölbte Oberseiten der Streben gebildet sein. Insbesondere können die Oberseiten der Streben satteldachförmig sein.The aerodynamic shape of the support structure can be formed by inclined or convexly curved upper sides of the struts. In particular, the tops of the struts can have a gable roof shape.

Ferner sind vorteilhaft die Siebbauteile unmittelbar über eckseitige Ansätze und/oder über Sicherungsstifte in den Aufnahmeöffnungen der Distanzelemente fixiert.Furthermore, the sieve components are advantageously fixed directly in the receiving openings of the spacer elements by means of lugs on the corner and / or by means of locking pins.

In weiterer vorteilhafter Ausbildung bestehen die Siebbauteile aus elastischem Vollmaterial mit ganz oder teilweise eingebetteter Armierung. Weiter ist noch vorteilhaft, wenn die Siebbauteile an seitlichen Stoßflächen umlaufende Dichtlippen haben.In a further advantageous embodiment, the sieve components consist of elastic solid material with fully or partially embedded reinforcement. It is also advantageous if the sieve components have circumferential sealing lips on lateral abutting surfaces.

Im folgenden wird die Erfindung anhand der Zeichnung an Ausführungsbeispielen näher erläutert. Es zeigt

  • Fig. 1 die Draufsicht auf ein Siebbauteil mit Distanzelementen und angedeuteter Tragkonstruktion für ein erfindungsgemäßes Siebdeck,
  • Fig. 2 einen Schnitt durch das Siebbauteil längs der Linie A-A in Fig. 1,
  • Fig. 3 einen Schnitt durch die Eckbefestigung aneinander grenzender Siebbauteile eines erfindungsgemäßen Siebdeckes mit an die Siebbauteile angearbeiteten Distanzelementen,
  • Fig. 4 einen Schnitt längs der Linie A-B-C-D in Fig. 3,
  • Fig. 5 einen Schnitt durch eine andere Eckbefestigung aneinandergrenzender Siebbauteile eines erfindungsgemäßen Siebdeckes mit separaten Distanzelementen,
  • Fig. 6 einen Schnitt durch eine weitere Ausführung einer Eckbefestigung der Siebbauteile eines erfindungsgemäßen Siebdeckes mit an der Tragkonstruktion angebrachten Distanzelementen,
  • Fig. 7 Querschnittsformen der Streben der Tragkonstruktion eines erfindungsgemäßen Siebedeckes,
  • Fig. 8 einen Teilschnitt durch den Rand eines Siebbauteils für ein erfindungsgemäßes Siebdeck,
  • Fig. 9 die Draufsicht auf ein weiteres Siebbauteil für ein erfindungsgemäßes Siebdeck mit eingebetteter Bewehrung und
  • Fig. 10 die Draufsicht auf ein anderes Siebbauteil für ein erfindungsgemäßes Siebdeck mit eingebetteter Bewehrung.
The invention is explained in more detail below with the aid of exemplary embodiments. It shows
  • 1 is a top view of a sieve component with spacer elements and indicated support structure for a sieve deck according to the invention,
  • 2 shows a section through the sieve component along the line AA in FIG. 1,
  • 3 shows a section through the corner fastening of adjacent screen components of a screen deck according to the invention with spacer elements worked on the screen components,
  • 4 shows a section along the line ABCD in FIG. 3,
  • 5 shows a section through another corner fastening of adjoining sieve components of a sieve deck according to the invention with separate spacer elements,
  • 6 shows a section through a further embodiment of a corner fastening of the sieve components of a sieve deck according to the invention with spacer elements attached to the supporting structure,
  • 7 cross-sectional shapes of the struts of the supporting structure of a sieve deck according to the invention,
  • 8 shows a partial section through the edge of a screen component for a screen deck according to the invention,
  • Fig. 9 is a plan view of another screen construction part for an inventive screen deck with embedded reinforcement and
  • 10 shows the top view of another sieve component for a sieve deck according to the invention with embedded reinforcement.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

Die Fig. 1 und 2 zeigen den grundsätzlichen Aufbau eines erfindungsgemäßen Siebdeckes. Es wird im wesentlichen durch Siebbauteile 1 gebildet, die sich zu einer durchgehenden Trennfläche ergänzen. Dazu stoßen die einzelnen Siebbauteile 1 in höhengleicher Anordnung abstandslos aneinander, was hinreichend bekannt und deshalb in der Zeichnung nicht näher dargestellt ist.1 and 2 show the basic structure of a screen deck according to the invention. It is essentially formed by sieve components 1, which complement each other to form a continuous separating surface. For this purpose, the individual sieve components 1 abut each other in the same height arrangement, which is well known and is therefore not shown in the drawing.

Jedes einzelne Siebelement hat die Grundform eines regelmäßigen Vielecks und in bevorzugter Ausführung die Gestalt eines Quadrates, wie es in der Zeichnung wiedergegeben ist. Dabei ist wesentlich, daß nicht nur die Befestigung sondern auch die Auflagerung der einzelnen Siebbauteile nur im Bereich der Ecken des jeweiligen Vielecks, also im Bereich der vier Ecken bei quadratischer Grundform erfolgt. Sofern die Siebbauteile eine größere Eckenzahl besitzen, kann die Unterstützung der einzelnen Siebbauteile auch nur an einigen dieser Ecken vorgesehen sein. So ist es möglich, ein sechseckiges oder achteckiges Siebbauteil nur im Bereich jeder zweiten Ecke zu befestigten und aufzulagern.Each individual sieve element has the basic shape of a regular polygon and, in a preferred embodiment, the shape of a square, as shown in the drawing. It is important that not only the attachment but also the support of the individual sieve components only takes place in the area of the corners of the respective polygon, that is to say in the area of the four corners with a square basic shape. If the sieve components have a larger number of corners, the support of the individual sieve components can also be provided only at some of these corners. It is thus possible to attach and support a hexagonal or octagonal sieve component only in the area of every second corner.

Die Siebbauteile 1 setzen sich im wesentlichen aus Randstegen 2 und kreuzenden Innenstegen 3 zusammen, welche Sieböffnungen 4 umschließen. Beim Ausführungsbeispiel haben die Sieböffnungen 4 die gleiche Grundform wie das Siebbauteil 1 selbst, sie können jedoch auch eine davon abweichende Gestalt, insbesondere eine Schlitz- oder Spaltform haben.The sieve components 1 are essentially composed of edge webs 2 and intersecting inner webs 3, which enclose sieve openings 4. In the exemplary embodiment, the screen openings 4 have the same basic shape as the screen component 1 itself, but they can also have a different shape, in particular a slot or slot shape.

An ihren Ecken 5 besitzen die Siebbauteile 1 unterseitige Ansätze 6, die nach unten über die untere Begrenzungsfläche der Siebbauteile 1 vorspringen. Mit diesen unterseitigen Ansätzen 6 sind die Siebbauteile 1 an einer darunterliegenden Tragkonstruktion 7 befestigt, wobei die Verbindung der Siebbauteile 1 mit der Tragkonstruktion 7 über Distanzelemente 8 erfolgt. Diese Distanzelemente 8 sorgen für einen Abstand »A« zwischen der Unterseite der Siebbauteile 1 und der Oberseite der Tragkonstruktion 7. Die Siebbauteile 1 können auch anders als über die Ansätze 6 auf den Distanzelementen 8 befestigt sein. Beim Ausführungsbeispiel nach den Fig. 1 und 2 besteht die Tragkonstruktion 7 aus rohrförmigen Tragstreben auf die als Distanzelemente 8 im Bereich der aneinander grenzenden Ecken 5 der Siebbauteile 1 Lagerböckchen 9 aufgesetzt sind. Diese Lagerböckchen 9 besitzen an ihrer Oberseite eine oder mehrere Aufnahmeöffnunqen 10, in die die unterseitigen Ansätze 6 der Siebbauteile 1 eingesteckt und darin fixiert werden. In bevorzugter Ausführung wie beim Ausführungsbeispiel greifen sämtliche Ansätze 6 im Bereich der aneinanderstoßenden Ecken benachbarter Siebbauteile 1 in eine gemeinsame Aufnahmeöffnung 10 der Distanzelemente 8. Zweckmäßig haben dazu die Ansätze 6 der Siebbauteile 1 die Gestalt eines Viertelzylinders oder Viertelzylinderrohres, so daß sich bei quadratischer Grundform der Siebbauteile 1 die vier aneinander grenzenden Ansätze 6 an den benachbart liegenden Ecken 5 der Siebbauteile 1 zu einem in die Aufnahmeöffnung 10 des jeweiligen Lagerböckchens 9 eingreifenden Vollzylinder oder Vollzylinderrohr ergänzen. Die Fixierung der eckseitigen Ansätze 6 der Siebbauteile 1 in den Aufnahmeöffnungen 10 der Lagerböckchen 9 kann entweder über eine druckknopfartige Ausbildung oder über zusätzlich einzusetzende Spreizstifte vorgenommen werden.At their corners 5, the sieve components 1 have lugs 6 on the underside, which project downward beyond the lower boundary surface of the sieve components 1. With these undersides 6 on the underside, the sieve components 1 are fastened to an underlying support structure 7, the connection of the sieve components 1 to the support structure 7 via spacer elements 8. These spacer elements 8 provide a distance “A” between the underside of the sieve components 1 and the top of the supporting structure 7. The sieve components 1 can also be fastened to the spacer elements 8 differently than via the lugs 6. In the embodiment according to FIGS. 1 and 2, the support structure 7 consists of tubular support struts onto which bearing blocks 9 are placed as spacer elements 8 in the region of the adjacent corners 5 of the sieve components 1. These bearing blocks 9 have on their upper side one or more receiving openings 10, into which the undersides 6 of the sieve components 1 are inserted and fixed therein. In a preferred embodiment, as in the exemplary embodiment, all the lugs 6 engage in the area of the abutting corners of adjacent sieve components 1 in a common receiving opening 10 of the spacer elements 8. Appropriately, the lugs 6 of the sieve components 1 have the shape of a quarter cylinder or quarter cylinder tube, so that the square basic shape of the Sieve components 1 complement the four adjoining lugs 6 at the adjacent corners 5 of the sieve components 1 to form a full cylinder or full cylinder tube engaging in the receiving opening 10 of the respective bearing block 9. The corner-side lugs 6 of the sieve components 1 can be fixed in the receiving openings 10 of the bearing blocks 9 either via a push-button-like design or via additional expansion pins to be used.

Infolge der punktförmigen Auflagerung der Siebbauteile 1 auf der Tragkonstruktion 7 ist es anders als in Fig. 1 gezeigt nicht erforderlich, die Streben der Tragkonstruktion 7 parallel zu den Randstegen 2 der Siebbauteile 1 verlaufen zu lassen. Beispielsweise können die Streben der Tragkonstruktion 7 auch diagonal zu den Siebbauteilen 1 angeordnet sein.As a result of the punctiform support of the sieve components 1 on the support structure 7, unlike in FIG. 1, it is not necessary to allow the struts of the support structure 7 to run parallel to the edge webs 2 of the sieve components 1. For example, the struts of the supporting structure 7 can also be arranged diagonally to the sieve components 1.

Die Fig. 3 und 4 zeigen Siebbauteie 1 für ein erfindungsgemäßes Siebdeck, an die die unterseitigen Distanzelemente 8 unmittelbar in Gestalt von vorspringenden Distanzfüßen 11 angeformt sind. Hierbei bestimmt die Höhe der Distanzfüße 11 den Abstand »A« zwischen der Unterseite der Siebbauteile 1 und der Oberseite der Tragkonstruktion 7 des Siebdecks. Die Distanzfüße 11 sind als Viertelrohrhülsen ausgebildet und tragen an ihrem Unterende Spreizlappen 12, mit der sie durch Befestigungsöffnungen 15 an der Oberseite der betreffenden Streben der Tragkonstruktion 7 hindurchgesteckt sind. In die durch die sich ergänzenden Distanzfüße 11 gebildete Durchgangsöffnung ist ein Befestigungsstift 13 eingesetzt, der die Spreizlappen 12 aufweitet und damit die Siebbauteile 1 an der Tragkonstruktion 7 festhält. Durch einen ausgeprägten Kopf 14 des Befestigungsstiftes 13, der in die Oberseite der Siebbauteile 1 eingesenkt ist, werden die Siebbauteile 1 auch in Vertikalrichtung sicher an der Tragkonstruktion 7 fixiert.3 and 4 show sieve components 1 for a sieve deck according to the invention, to which the spacer elements 8 on the underside are formed directly in the form of protruding spacer feet 11. The height of the spacer feet 11 determines the distance “A” between the underside of the sieve components 1 and the top of the support structure 7 of the sieve deck. The spacer feet 11 are designed as quarter-tube sleeves and carry spreading tabs 12 at their lower end, with which they are inserted through fastening openings 15 on the upper side of the relevant struts of the supporting structure 7. In the through opening formed by the complementary spacer feet 11, a fastening pin 13 is inserted, which expands the spreading tabs 12 and thus holds the sieve components 1 to the supporting structure 7. By means of a pronounced head 14 of the fastening pin 13, which is sunk into the top of the sieve components 1, the sieve components 1 are also securely fixed to the supporting structure 7 in the vertical direction.

Fig. 5 zeigt eine weitere Ausführung eines erfindungsgemäßen Siebdeckes, bei dem die Siebbauteile 1 mit der Tragkonstruktion 7 über als separate Bauteile 16 ausgebildete Distanzelemente 8 verbunden sind. Die Befestigung der Siebbauteile 1 die nach unten vorspringen, eckseitigen Ansätze 6 an den Distanzbauteilen 16 kann in gleicher Weise wie die Sicherung der Siebbauteile 1 mit fest angeformten Distanzelementen 8 gemäß Fig. 3 erfolgen. Dazu bilden die Ansätze selbst mit ihren freien Enden die Spreizlappen 12 und nehmen in der durch Ergänzung gebildeten Durchgangsöffnung den Befestigungsstift 13 auf. Die separaten Distanzbauteile 16 besitzen oberseitig eine entsprechende Aufnahmeöffnung 17, durch die die Ansätze 6 der Siebbauteile 1 hindurchgesteckt sind.5 shows a further embodiment of a screen deck according to the invention, in which the screen components 1 are connected to the supporting structure 7 via spacer elements 8 designed as separate components 16. The fastening of the sieve components 1, which project downwards, on the corner-side lugs 6 to the spacer components 16, can be carried out in the same way as the securing of the sieve components 1 with firmly formed spacer elements 8 according to FIG. 3. For this purpose, the lugs themselves form the spreading tabs 12 with their free ends and receive the fastening pin 13 in the through opening formed by the addition. The separate spacer components 16 have a corresponding receiving opening 17 on the top, through which the lugs 6 of the sieve components 1 are inserted.

Die Befestigung der Distanzbauteile 16 an der darunterliegenden Tragkonstruktion 7 kann über unterseitig angeformte Rastköpfe 18 erfolgen, die in entsprechende Befestigungsöffnungen 19 der Tragkonstruktion 7 eingeknöpft werden. Zweckmäßig bestehen die Distanzbauteile 16 aus einem elastischen Werkstoff, wie insbesondere Kunststoff, aus dem bevorzugt auch die Siebbauteile 1 hergestellt sind. Die Befestigungsstifte 13 können aus dem gleichen Kunststoffmaterial bestehen.The attachment of the spacer components 16 on the underlying support structure 7 can take place via underside molded-on locking heads 18, which are buttoned into corresponding fastening openings 19 of the support structure 7. The spacer components 16 expediently consist of an elastic material, such as in particular plastic, from which the sieve components 1 are preferably also produced. The fastening pins 13 can consist of the same plastic material.

Auch bei der Ausführung nach Fig. 5 bestimmt die Höhe der Distanzbauteile 16 den wesentlichen Abstand »A« der Unterseite der Siebbauteile 1 von der Oberseite der Tragkonstruktion 7.5 also determines the height of the spacer components 16 the essential distance "A" of the underside of the sieve components 1 from the top of the support structure 7.

Ebenso wie die Fig. 1 und 2 zeigt Fig. 6 eine Ausführung eines erfindungsgemäßen Siebdekkes, bei der die Distanzelemente 8 gestellfest an der Tragkonstruktion 7 sitzen. Die Besonderheit der hier verwendeten Tragkonstruktion 7 liegt darin, daß deren Streben 20 aus einem hochkant angeordneten Vierkantprofil gebildet sind. Damit wird eine satteldachförmige Schrägung der Oberseiten 21 der Streben 20 der Tragkonstruktion 7 erreicht, um ein Abgleiten des Siebgutes von den Streben 20 zu erleichtern. Einerseits wird dadurch die schleißende Beanspruchung der Tragkonstruktion durch das Siebgut auf ein Mindestmaß reduziert andererseits ist durch diese Maßnahme auch vermieden, daß sich das Siebgut auf der Oberseite der Tragkonstruktion 7 ablagert.Like FIGS. 1 and 2, FIG. 6 shows an embodiment of a screen cover according to the invention, in which the spacer elements 8 are seated on the supporting structure 7 in a frame-fixed manner. The peculiarity of the supporting structure 7 used here is that its struts 20 are formed from an upright square profile. A saddle roof-shaped bevel of the upper sides 21 of the struts 20 of the supporting structure 7 is thus achieved in order to facilitate sliding of the screened material from the struts 20. On the one hand, the wear on the supporting structure by the screenings is reduced to a minimum, on the other hand, this measure also prevents the screenings from being deposited on the upper side of the supporting structure 7.

Weitere Querschnittsformen für die Streben der Tragkonstruktion 7, mit denen diese Vorteile erreicht werden, zeigt Fig. 7. Fig. 7a gibt noch einmal das Vierkant-Querschnittsprofil für die Streben 20 mit satteldachförmig geschrägten Oberseiten 21 wieder. Fig. 7b zeigt ebenfalls eine Strebe 22 mit satteldachförmig geschrägten Oberseiten 21, jedoch wird dies hier dadurch erreicht, daß auf ein flach aufliegendes Vierkantprofil oberseitig eine Winkelschiene aufgesetzt ist. Fig. 7c gibt eine Strebe 23 wieder, die ein zylinderrohrförmiges Querschnittsprofil mit einer gewölbten Oberseite 24 hat. In gleicher Weise hat auch die in Fig. 7d dargestellte Strebe 25 eine gewölbte Oberseite 24 infolge eines flachovalen Querschnittes, wobei die längere Achse des Ovals in der Vertikalrichtung liegt. Für alle dargestellten und weiter möglichen Querschnittsformen der Streben der Tragkonstruktion ist es wesentlich, daß die gebildeten Oberseiten zur durch die darüberliegenden Siebbauteile gebildeten Trennfläche geneigt angeordnet sind.FIG. 7 shows further cross-sectional shapes for the struts of the supporting structure 7, with which these advantages are achieved. FIG. 7a shows again the square cross-sectional profile for the struts 20 with top surfaces 21 which are slanted in the form of a gable roof. Fig. 7b also shows a strut 22 with a saddle roof-shaped sloping tops 21, but this is achieved here in that an angle rail is placed on the top of a flat lying square profile. 7c shows a strut 23 which has a cylindrical tubular cross-sectional profile with a curved upper side 24. In the same way, the strut 25 shown in FIG. 7d also has a curved upper side 24 as a result of a flat oval cross section, the longer axis of the oval lying in the vertical direction. For all of the cross-sectional shapes of the struts of the supporting structure shown and possible, it is essential that the upper sides formed are arranged inclined to the separating surface formed by the screen components lying above them.

Da bei einem erfindungsgemäßen Siebdeck die Siebbauteile 1 lediglich an ihren Ecken punktförmig unterstützt sind, besteht die Gefahr, daß sich zwischen den seitlichen Stoßflächen 26 der aneinander grenzenden Siebbauteile 1 nach unten freie Spalte bilden, durch die Siebgut hindurchtreten kann. Um dem vorzubeugen, können die Siebbauteile 1 längs ihrer seitlichen Stoßflächen 26 zumindest eine umlaufende Dichtlippe 27 haben, was Fig. 8 veranschaulicht.Since in a screen deck according to the invention the screen components 1 are only point-supported at their corners, there is a risk that free gaps can form downward between the side abutting surfaces 26 of the adjacent screen components 1, through which screenings can pass. In order to prevent this, the sieve components 1 can have at least one circumferential sealing lip 27 along their lateral abutting surfaces 26, which is illustrated in FIG. 8.

Fig. 9 zeigt ein Siebbauteil, wie es für ein Siebdeck der erfindungsgemäßen Art bevorzugt verwendet wird. Es besteht aus einem elastischen Vollmaterial, das durch eine eingebettete Armierung 28, 29 versteift ist. Die Armierung gliedert sich in eine außen umlaufende, im Bereich der Randstege 2 liegende Ringarmierung 28, die sich im wesentlichen zwischen den Auflageekken 5 der Siebbauteile 1 erstreckt. Ergänzt wird diese Ringarmierung 28 durch eine kreuzförmig eingebettete Bewehrung 29, die in Richtung der Quer- und Längsmitte der Siebbauteile 1 angeordnet ist. Sowohl die äußere Armierung 28 als die innere, kreuzende Bewehrung 29 kann ganz oder teilweise in das elastische Vollmaterial der Siebbauteile 1 eingebettet sein.Fig. 9 shows a screen component as it is preferably used for a screen deck of the type according to the invention. It consists of an elastic solid material that is reinforced by an embedded reinforcement 28, 29. The reinforcement is divided into an outer circumferential ring reinforcement 28 located in the area of the edge webs 2, which essentially extends between the support corners 5 of the sieve components 1. This ring reinforcement 28 is supplemented by a cross-shaped reinforcement 29, which is arranged in the direction of the transverse and longitudinal center of the sieve components 1. Both the outer reinforcement 28 and the inner, crossing reinforcement 29 can be completely or partially embedded in the elastic solid material of the sieve components 1.

Fig. 10 zeigt eine weitere Ausführung der Siebbauteile für ein erfindungsgemäßes Siebdeck. Auch hier bestehen die Siebbauteile 1 aus elastischem Vollmaterial mit einer äußeren, ringförmigen Armierung 28, die sich zwischen den Auflagerecken 5 der Siebbauteile 1 erstreckt. Jedoch ist hier die Armierung 28 etwas nach innen versetzt, so daß längs der Ränder der Siebbauteile 1 halbe, nach außen öffnende Sieböffnungen 30 ausgeformt sein können, die sich, wie in Fig. 10 dargestellt, mit den randlichen, halben Sieböffnungen 30 angrenzender Siebbauteile 1 zu vollen Sieböffnungen ergänzen. Hierdurch erreicht man eine Siebfläche mit einem gleichmäßigen Raster für die Sieböffnungen, das sich über alle Siebbauteile 1 hinweg erstreckt. Den gleichen Effekt erreicht man auch dann, wenn die Randstege 2 der Siebbauteile 1 halb so breit wie die Innenstege 3 ausgebildet werden.10 shows a further embodiment of the sieve components for a sieve deck according to the invention. Here too, the sieve components 1 consist of elastic solid material with an outer, annular reinforcement 28, which extends between the support corners 5 of the sieve components 1. However, here the reinforcement 28 is offset somewhat inwards so that half, outwardly opening sieve openings 30 can be formed along the edges of the sieve components 1, which, as shown in FIG. 10, coincide with the peripheral, half sieve openings 30 of adjacent sieve components 1 complete to full sieve openings. This results in a screen surface with a uniform grid for the screen openings, which extends over all screen components 1. The same effect can also be achieved if the edge webs 2 of the sieve components 1 are made half as wide as the inner webs 3.

Claims (13)

1. A screen deck for screening machines, scrubbers or the like, comprising a support structure (7) and single screen panels (1) which are releasably fastened thereon and are provided with a plurality of screen apertures (4) and which are arranged to form a continous separation surface and, in plan, have a polygonal shape, characterised in that the screen panels (1) are supported only in the zones of some or all of their corners (5) in spaced relationship to the support structure (7) and are connected thereto by means of spacer elements (8), whereby neighbouring screen panels (1) with their adjacent corners (5) are in each case supported on a single spacer element (8) and the spacer elements (8) have, on their upper face, a single fastening hole (10, 17) for centrally securing all the adjacent corners (5) of the respective screen panels (1).
2. A screen deck according to Claim 1, characterised in that the spacer elements (8) are firmly attached to the screen panels (1).
3. A screen deck according to Claim 1, characterised in that the spacer elements (8) are separate components (15) which can be inserted between the screen panels (1) and the support structure (7).
4. A screen deck according to Claim 1, characterised in that the spacer elements (8) are firmly attached to the support structure (7).
5. A screen deck according to Claim 4, characterised in that the spacer elements (8) comprise trestles (9) mounted on the support structure (7).
6. A screen deck according to any one of Claims 1 -5, characterised in that the support structure (7) comprises struts (20, 22, 23, 25) with upper faces (21, 24) inclined with respect to the separation surface.
7. A screen deck according to Claim 6, characterised in that the upper faces (21) of the struts (20, 22) of the support structure (7) are gable roof-shaped.
8. A screen deck according to Claim 6, characterised in that the upper faces (24) of the struts (23,25) of the support structure (7) are arched.
9. A screen deck according to any one of Claims 1-8, characterised in that the screen panels (1) are fixed directly by corner lugs (6) and/or by securing pins (13) in the fastening holes (10, 17) of the spacer elements (8).
10. A screen deck according to any one of Claims 1-9, characterised in that the screen panels (1) comprise elastic solid material with totally or partially embedded reinforcement (28, 29).
11. A screen deck according to any one of Claim 1-10, characterised in that the screen panels (1) have sealing lips (27) extending around lateral abutting surfaces (26).
12. A screen deck according to any one of Claims 1-11, characterised in that the screen panels (1) have along their edges, half screen apertures (3) which are open in an outward direction and each form complete screen apertures with neighbouring screen panels (1).
13. A screen deck according to any one of Claims 1-12, characterised in that the screen panels (1) have a square or rectangular basic shape.
EP80901265A 1979-07-04 1981-01-26 Sifter plate Expired EP0036858B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2926987A DE2926987B1 (en) 1979-07-04 1979-07-04 Screening machine screen deck
DE2926987 1979-07-04

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EP0036858A1 EP0036858A1 (en) 1981-10-07
EP0036858B1 true EP0036858B1 (en) 1984-04-04

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US (1) US4409099A (en)
EP (1) EP0036858B1 (en)
AU (1) AU546016B2 (en)
BR (1) BR8008965A (en)
CA (1) CA1148503A (en)
DE (1) DE2926987B1 (en)
WO (1) WO1981000065A1 (en)
ZA (1) ZA804039B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860612A1 (en) * 1998-12-29 2000-07-06 Ludwig Krieger Draht Und Kunst Sieve lining for oscillating screen for grading of loose materials has sieving elements reinforcement-free, and separate reinforcing rods on one side supported on adaptors and on other side detachably overlapped by sieving elements
DE19860612B4 (en) * 1998-12-29 2007-04-12 Ludwig Krieger Draht- Und Kunststofferzeugnisse Gmbh Screen covering for vibrating screens

Also Published As

Publication number Publication date
EP0036858A1 (en) 1981-10-07
AU6120780A (en) 1981-02-03
WO1981000065A1 (en) 1981-01-22
ZA804039B (en) 1981-06-24
DE2926987B1 (en) 1981-01-15
CA1148503A (en) 1983-06-21
BR8008965A (en) 1981-10-20
US4409099A (en) 1983-10-11
AU546016B2 (en) 1985-08-08

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