EP0770431A1 - Screen bottom for circular screen - Google Patents

Screen bottom for circular screen Download PDF

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Publication number
EP0770431A1
EP0770431A1 EP96114685A EP96114685A EP0770431A1 EP 0770431 A1 EP0770431 A1 EP 0770431A1 EP 96114685 A EP96114685 A EP 96114685A EP 96114685 A EP96114685 A EP 96114685A EP 0770431 A1 EP0770431 A1 EP 0770431A1
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EP
European Patent Office
Prior art keywords
fabric
sieve
area
wear
outlet
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.)
Withdrawn
Application number
EP96114685A
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German (de)
French (fr)
Inventor
Eitel Fritz Haver
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.)
Haver and Boecker OHG
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Haver and Boecker OHG
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Filing date
Publication date
Application filed by Haver and Boecker OHG filed Critical Haver and Boecker OHG
Publication of EP0770431A1 publication Critical patent/EP0770431A1/en
Withdrawn legal-status Critical Current

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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
    • B07B1/06—Cone or disc shaped screens
    • 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
    • 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

Definitions

  • the invention relates to a sieve plate for a circular sieve machine, part of the covering forming the place for the task and / or the outlet for the material to be sieved.
  • round screening machines were mostly manufactured up to a sieve bottom diameter of approx. 1,250 mm. However, it is also possible to manufacture larger screening machines with diameters up to 3,000 mm or even larger.
  • These sieve trays are attached to a clamping ring.
  • the material to be sieved is usually placed in the center, the outlet on the outer edge. Covering the circular sieve trays is not a problem with these sizes, but shipping and changing the sieve tray can be difficult.
  • Circular sieve trays are known which are divided in the middle, so that shipping can be carried out more easily.
  • the diameter of these sieve trays is usually over 2,000 mm. They are usually transported lying down. However, widths over 2,500 mm are only permitted for truck shipping with a special permit from the responsible federal state, Road Traffic Office, which is often difficult to obtain.
  • the present invention is based on the object of designing a circular sieve tray in such a way that the economy is increased by a longer service life, and in addition that changing a sieve tray is simplified.
  • the task is solved in that the area forming these points can be replaced separately.
  • the bottom of the circular sieve can thus be divided several times so that the dimensions of the parts to be transported can be reduced to such an extent that they can be transported in the normal manner without special permission.
  • the feed point and the area forming the outlet of the sieve bottom consist of a fabric that is more wear-resistant than the other clothing.
  • the service life is significantly increased due to the more wear-resistant fabric in the feed and discharge area. Since this significantly reduces the operating costs of a screening machine, the economy is better.
  • the subdivision of the sieve bottom reduces the time for replacement, because usually only this part has to be replaced.
  • the higher wear resistance in the feed area and possibly also in the outlet area can be achieved in various ways.
  • the feed point and possibly also the outlet area consist of a fabric with larger wire diameters than the rest of the fabric.
  • the mesh size in the feed area or in the outlet area can match that of the remaining fabric.
  • the fabric in said areas can consist of wires which have a significantly higher wear resistance than the other fabric.
  • the higher wear resistance in said areas can be achieved by a weave weave that is different from that of normal fabric, as described for example in DIN 4185 sheet 3 under points 3 and 4 (twill weaves or braid weave).
  • the fabric is fixed to an exchangeable individual frame at the loading and / or outlet point. If a change is necessary, is only necessary to replace this single frame, which is much smaller than the entire sieve plate, so that the difficulties encountered when replacing relatively large circular sieve plates are eliminated. If the circular sieve bottom is formed from several individual frames, the sieve bottom can be transported in the disassembled state, so that special permits from the road traffic office are not required.
  • the sieve tray 1 shown in FIG. 1 consists of the three individual frames 2, 3, 4, which each form segments.
  • the two outer individual frames 2 and 4 are designed like a circular section, so that the central individual frame 3 is given an approximately rectangular shape.
  • each individual frame 2, 3, 4 is provided with a covering made of a wire mesh, which is fixed to the top of the respective individual frame 2, 3, 4 by gluing or welding.
  • FIG. 1 also shows that the wire mesh of the central single frame 3 can consist of a mesh of a different type.
  • the wear resistance can also be increased by the possibilities already mentioned.
  • the individual frames 2, 3, 4 lie within the contour of an outer frame 5, which can also be omitted.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

Rotary screening machine has a screen deck in which one section of the screen cloth is used for entry and/or exit of material being screened and can be replaced separately from another part. Preferably the entry area (3) and, where necessary, the exit area (2,4) is of cloth more wear-resistant than the remaining areas. The wear resistance is provided by providing a larger diameter wire for the mesh than in other areas, while maintaining the same mesh size. It may also have higher strength than the wire in other parts. In a particularly preferred configuration, the screen deck is composed of several individual frames (2,3,4).

Description

Die Erfindung betrifft einen Siebboden für eine Rundsiebmaschine, wobei ein Teil der Bespannung die Stelle für die Aufgabe und/oder den Auslauf für das Siebgut bildet.The invention relates to a sieve plate for a circular sieve machine, part of the covering forming the place for the task and / or the outlet for the material to be sieved.

Runde Siebmaschinen wurden in der Vergangenheit meistens bis zu einem Siebbodendurchmesser von ca. 1.250 mm hergestellt. Die Herstellung größerer Siebmaschinen mit Durchmessern bis zu 3.000 mm oder noch darüber hinaus ist jedoch ebenfalls möglich.In the past, round screening machines were mostly manufactured up to a sieve bottom diameter of approx. 1,250 mm. However, it is also possible to manufacture larger screening machines with diameters up to 3,000 mm or even larger.

Diese Siebböden werden auf einem Spannring befestigt. Die Aufgabe des Siebgutes erfolgt meistens mittig, der Auslauf am äußeren Rand. Das Bespannen der Rundsiebböden ist bei diesen Größen unproblematisch, jedoch können der Versand und das Auswechseln des Siebbodens mit Schwierigkeiten verbunden sein.These sieve trays are attached to a clamping ring. The material to be sieved is usually placed in the center, the outlet on the outer edge. Covering the circular sieve trays is not a problem with these sizes, but shipping and changing the sieve tray can be difficult.

Da das zu siebende Gut üblicherweise immer an der gleichen Stelle aufgegeben wird, die im mittleren Bereich des Siebbodens liegt, ist dieser Bereich extrem stark belastet, so daß nach einer gewissen Betriebszeit der Siebboden auszuwechseln ist.Since the material to be screened is usually always placed in the same place that is in the central area of the screen bottom, this area is extremely heavily loaded, so that the screen bottom must be replaced after a certain operating time.

Es sind Rundsiebböden bekannt, die mittig geteilt sind, damit der Versand einfacher durchgeführt werden kann. Der Durchmesser dieser Siebböden liegt meistens über 2.000 mm. Sie werden üblicherweise liegend transportiert. Es sind jedoch Breiten über 2.500 mm beim Lkw-Versand nur mit einer Sondergenehmigung des zuständigen Bundeslandes, Straßenverkehrsamt gestattet, die oft schwierig zu erhalten ist.Circular sieve trays are known which are divided in the middle, so that shipping can be carried out more easily. The diameter of these sieve trays is usually over 2,000 mm. They are usually transported lying down. However, widths over 2,500 mm are only permitted for truck shipping with a special permit from the responsible federal state, Road Traffic Office, which is often difficult to obtain.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Rundsiebboden so auszubilden, daß die Wirtschaftlichkeit durch eine längere Nutzungsdauer erhöht wird, und daß darüber hinaus das Wechseln eines Siebbodens vereinfacht wird.The present invention is based on the object of designing a circular sieve tray in such a way that the economy is increased by a longer service life, and in addition that changing a sieve tray is simplified.

Die gestellte Aufgabe wird gelöst, indem der diese Stellen bildende Bereich separat ausgewechselt werden kann. Der Rundsiebboden kann dadurch mehrfach unterteilt werden, so daß die Abmessungen der zu transportierenden Teilstücke soweit reduziert werden kann, daß sie in der normalen Weise ohne Sondergenehmigung transportiert werden können. Zur Erhöhung der Nutzungsdauer ist in weiterer Ausgestaltung vorgesehen, daß der die Aufgabestelle und den auslaufbildenden Bereich des Siebbodens aus einem gegenüber der übrigen Bespannung verschleißfesteren Gewebe besteht. Durch das verschleißfestere Gewebe im Aufgabe- und Auslaufbereich wird die Nutzungsdauer wesentlich erhöht. Da dadurch die Betriebskosten einer Siebmaschine deutlich verringert werden, ist die Wirtschaftlichkeit besser. Ferner wird durch die Unterteilung des Siebbodens die Zeit für das Auswechseln gesenkt, weil meistens nur dieses Teil ausgetauscht werden muß.The task is solved in that the area forming these points can be replaced separately. The bottom of the circular sieve can thus be divided several times so that the dimensions of the parts to be transported can be reduced to such an extent that they can be transported in the normal manner without special permission. In order to increase the service life, it is provided in a further embodiment that the feed point and the area forming the outlet of the sieve bottom consist of a fabric that is more wear-resistant than the other clothing. The service life is significantly increased due to the more wear-resistant fabric in the feed and discharge area. Since this significantly reduces the operating costs of a screening machine, the economy is better. Furthermore, the subdivision of the sieve bottom reduces the time for replacement, because usually only this part has to be replaced.

Die höhere Verschleißfestigkeit im Aufgabebereich und ggfs. auch im Auslaufbereich kann auf verschiedene Weise erreicht werden. Gemäß einem ersten Vorschlag ist vorgesehen, daß die Aufgabestelle und ggfs. auch der Auslaufbereich aus einem Gewebe mit gegenüber dem restlichen Gewebe größeren Drahtdurchmessern besteht. Dabei kann die Maschenweite im Aufgabebereich bzw. im Auslaufbereich mit der des restlichen Gewebes übereinstimmen. Gemäß einem zweiten Vorschlag kann das Gewebe in den besagten Bereichen aus Drähten bestehen, die gegenüber dem anderen Gewebe eine wesentlich höhere Verschleißfestigkeit aufweisen. Gemäß einem dritten Vorschlag kann die höhere Verschleißfestigkeit in den besagten Stellen durch eine gegenüber dem normalen Gewebe andere Webbindung erreicht werden, wie sie beispielsweise in DIN 4185 Blatt 3 unter den Punkten 3 und 4 (Köperbindungen oder Tressengewebe) beschrieben sind.The higher wear resistance in the feed area and possibly also in the outlet area can be achieved in various ways. According to a first proposal, it is provided that the feed point and possibly also the outlet area consist of a fabric with larger wire diameters than the rest of the fabric. The mesh size in the feed area or in the outlet area can match that of the remaining fabric. According to a second proposal, the fabric in said areas can consist of wires which have a significantly higher wear resistance than the other fabric. According to a third proposal, the higher wear resistance in said areas can be achieved by a weave weave that is different from that of normal fabric, as described for example in DIN 4185 sheet 3 under points 3 and 4 (twill weaves or braid weave).

Um die Kosten noch weiter zu reduzieren, ist vorgesehen, daß zumindest das Gewebe an der Aufgabe- und/oder Auslaufstelle an einem auswechselbaren Einzelrahmen festgelegt ist. Wenn ein Auswechseln notwendig ist, ist nur noch erforderlich, diesen Einzelrahmen zu ersetzen, der gegenüber dem gesamten Siebboden wesentlich kleiner ist, so daß die beim Auswechseln von relativ großen Rundsiebböden auftretenden Schwierigkeiten entfallen. Wenn der Rundsiebboden aus mehreren Einzelrahmen gebildet ist, kann der Siebboden im zerlegten Zustand transportiert werden, so daß Sondergenehmigungen des Straßenverkehrsamtes entfallen.In order to reduce the costs even further, it is provided that at least the fabric is fixed to an exchangeable individual frame at the loading and / or outlet point. If a change is necessary, is only necessary to replace this single frame, which is much smaller than the entire sieve plate, so that the difficulties encountered when replacing relatively large circular sieve plates are eliminated. If the circular sieve bottom is formed from several individual frames, the sieve bottom can be transported in the disassembled state, so that special permits from the road traffic office are not required.

Anhand der beiliegenden Zeichnungen wird die Erfindung noch näher erläutert.The invention is explained in more detail with reference to the accompanying drawings.

Es zeigen:

Figur 1
einen erfindungsgemäßen Siebboden in Draufsicht in vereinfachter Darstellung und
Figur 2
eine Stirnansicht des Rundsiebbodens gemäß der Figur 1.
Show it:
Figure 1
a sieve tray according to the invention in plan view in a simplified representation and
Figure 2
3 shows an end view of the circular sieve bottom according to FIG. 1.

Der in der Figur 1 dargestellte Siebboden 1 besteht aus den drei Einzelrahmen 2, 3, 4, die jeweils Segmente bilden. Die beiden äußeren Einzelrahmen 2 und 4 sind wie ein Kreisabschnitt gestaltet, so daß der mittlere Einzelrahmen 3 eine annähernd rechteckige Form erhält. In der Figur 1 ist angedeutet, daß jeder Einzelrahmen 2, 3, 4 mit einer Bespannung aus einem Drahtgewebe versehen ist, die an der Oberseite des jeweiligen Einzelrahmens 2, 3, 4 durch Klebung oder Verschweißung fixiert ist. Die Figur 1 zeigt ferner, daß das Drahtgewebe des mittleren Einzelrahmens 3 aus einem Gewebe anderer Sorte bestehen kann. Die Verschleißfestigkeit läßt sich jedoch auch durch die bereits erwähnten Möglichkeiten erhöhen. In nicht dargestellter Weise ist es auch möglich, den mittleren Einzelrahmen 3 noch weiter aufzuteilen, so daß das verschleißfestere Gewebe sich nur über den mittleren Bereich erstreckt. Im dargestellten Ausführungsbeispiel liegen die Einzelrahmen 2, 3, 4 innerhalb der Kontur eines Außenrahmens 5, der auch entfallen kann.The sieve tray 1 shown in FIG. 1 consists of the three individual frames 2, 3, 4, which each form segments. The two outer individual frames 2 and 4 are designed like a circular section, so that the central individual frame 3 is given an approximately rectangular shape. In Figure 1 it is indicated that each individual frame 2, 3, 4 is provided with a covering made of a wire mesh, which is fixed to the top of the respective individual frame 2, 3, 4 by gluing or welding. FIG. 1 also shows that the wire mesh of the central single frame 3 can consist of a mesh of a different type. However, the wear resistance can also be increased by the possibilities already mentioned. In a manner not shown, it is also possible to divide the middle individual frame 3 even further, so that the more wear-resistant fabric extends only over the middle area. In the illustrated embodiment, the individual frames 2, 3, 4 lie within the contour of an outer frame 5, which can also be omitted.

Claims (9)

Siebboden für eine Rundsiebmaschine, wobei ein Teil der Bespannung die Stelle für die Aufgabe und/oder den Auslauf für das Siebgut bildet, dadurch gekennzeichnet, daß der diese Stellen bildende Bereich separat ausgewechselt werden kann.Sieve bottom for a circular sieve machine, part of the fabric forming the place for the task and / or the outlet for the material to be sieved, characterized in that the area forming these places can be replaced separately. Siebboden nach Anspruch 1, dadurch gekennzeichnet, daß der diese Stellen bildende Bereich separat auswechselbar ist.Sieve tray according to claim 1, characterized in that the area forming these points can be replaced separately. Siebboden nach Anspruch 1, dadurch gekennzeichnet, daß der die Aufgabestelle und ggfs. der den Auslauf bildende Bereich des Gewebes aus einem gegenüber der übrigen Bespannung verschleißfesteren Gewebe besteht.Sieve bottom according to claim 1, characterized in that the area of the fabric forming the feed point and possibly the outlet consists of a fabric which is more wear-resistant than the other clothing. Siebboden nach Anspruch 2, dadurch gekennzeichnet, daß der verschleißfestere Teil des Gewebes mit gegenüber dem restlichen Gewebe größeren Drahtdurchmessern besteht.Sieve tray according to claim 2, characterized in that the more wear-resistant part of the fabric consists of wire diameters larger than the remaining fabric. Siebboden nach Anspruch 3, dadurch gekennzeichnet, daß die Maschenweite des verschleißfesteren Gewebes im Bereich der Aufgabestelle und ggfs. des Auslaufes mit der Maschenweite des übrigen Gewebes übereinstimmt.Sieve tray according to claim 3, characterized in that the mesh size of the more wear-resistant fabric in the area of the feed point and possibly the outlet corresponds to the mesh size of the remaining fabric. Siebboden nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Drähte des verschleißfesteren Gewebes im Bereich der Aufgabestelle und ggfs. des Auslaufes gegenüber den Drähten des übrigen Gewebes eine höhere Festigkeit aufweisen.Sieve tray according to one or more of the preceding claims 1 to 4, characterized in that the wires of the more wear-resistant Fabric in the area of the feed point and possibly the outlet have a higher strength compared to the wires of the remaining fabric. Siebboden nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das verschleißfestere Gewebe aus einer anderen Webbindung (Köper- oder Tressenbindung) zur Erhöhung der Standzeit des Siebbodens besteht.Sieve plate according to one or more of the preceding claims 1 to 5, characterized in that the more wear-resistant fabric consists of a different weave (twill or braid weave) to increase the service life of the sieve plate. Siebboden nach Anspruch 1, dadurch gekennzeichnet, daß zumindest der Teil der Aufgabe- und/oder Auslaufstelle aus einem auswechselbaren Einzelrahmen besteht.Sieve tray according to claim 1, characterized in that at least the part of the feed and / or outlet point consists of an exchangeable individual frame. Siebboden nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Siebboden (1) aus mehreren Einzelrahmen (2, 3, 4) zusammengesetzt ist.Sieve tray according to one or more of the preceding claims 1 to 7, characterized in that the sieve tray (1) is composed of several individual frames (2, 3, 4).
EP96114685A 1995-10-28 1996-09-13 Screen bottom for circular screen Withdrawn EP0770431A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29517131U 1995-10-28
DE29517131U DE29517131U1 (en) 1995-10-28 1995-10-28 Sieve bottom for a circular sieve machine

Publications (1)

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EP0770431A1 true EP0770431A1 (en) 1997-05-02

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EP96114685A Withdrawn EP0770431A1 (en) 1995-10-28 1996-09-13 Screen bottom for circular screen

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078697A1 (en) * 1999-08-18 2001-02-28 ALLGAIER WERKE GmbH Screen bottom for circular screen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1753355A (en) * 1928-04-10 1930-04-08 Stine Samuel Blaine Screen structure
GB956619A (en) * 1961-10-30 1964-04-29 Peter Drummond Improvements in and relating to gyratory separators
DE1244536B (en) * 1965-09-10 1967-07-13 Karlstad Mekaniska Ab Sorters, especially for wood chips
US5137622A (en) * 1988-09-27 1992-08-11 United Wire Limited Filter screen assembly
DE4140210A1 (en) * 1991-12-05 1993-06-09 Gummi-Kueper Gmbh & Co Kg, 4630 Bochum, De Screening machine with replaceable sieves - sieves can be snapped in place from above or slid sideways into short transverse T-slots and retained by side distance piece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024318B (en) * 1955-03-31 1958-02-13 Keller G M B H Sieve drum covered with wire mesh
DE2832747B1 (en) * 1978-07-26 1979-11-22 Steinhaus Gmbh Screen deck

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1753355A (en) * 1928-04-10 1930-04-08 Stine Samuel Blaine Screen structure
GB956619A (en) * 1961-10-30 1964-04-29 Peter Drummond Improvements in and relating to gyratory separators
DE1244536B (en) * 1965-09-10 1967-07-13 Karlstad Mekaniska Ab Sorters, especially for wood chips
US5137622A (en) * 1988-09-27 1992-08-11 United Wire Limited Filter screen assembly
DE4140210A1 (en) * 1991-12-05 1993-06-09 Gummi-Kueper Gmbh & Co Kg, 4630 Bochum, De Screening machine with replaceable sieves - sieves can be snapped in place from above or slid sideways into short transverse T-slots and retained by side distance piece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078697A1 (en) * 1999-08-18 2001-02-28 ALLGAIER WERKE GmbH Screen bottom for circular screen

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Publication number Publication date
DE29517131U1 (en) 1996-01-18

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