EP3275562B1 - Finger screen - Google Patents

Finger screen Download PDF

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Publication number
EP3275562B1
EP3275562B1 EP17000705.8A EP17000705A EP3275562B1 EP 3275562 B1 EP3275562 B1 EP 3275562B1 EP 17000705 A EP17000705 A EP 17000705A EP 3275562 B1 EP3275562 B1 EP 3275562B1
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EP
European Patent Office
Prior art keywords
fingers
finger
cross
screen according
finger screen
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.)
Active
Application number
EP17000705.8A
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German (de)
French (fr)
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EP3275562A1 (en
Inventor
Heinrich Müller
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.)
Mueller & Co Aufbereitungstechnik AG
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Mueller & Co Aufbereitungstechnik AG
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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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
    • B07B13/07—Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement

Definitions

  • the invention relates to a finger sieve with at least one traverse, projecting from the extending in the transport direction of Siebguts finger, the start with her finger root on the crossbar and behind a free finger end, with adjacent fingers are offset in height at the front of the traverse and in Spread the transport direction of the screenings.
  • At least part of the screen surface is known to be formed by screen fingers, which project from a traverse and extend in the transport direction of the screen material.
  • the fingers put in the direction of transport of Siebguts seen front with her finger root on the crossbar. Your rear in the direction of transport seen end is free.
  • Finger sieves are especially suitable for classifying difficult screening goods, which quickly lead to sieve blockages on machine screens with conventional meshes. Finger sieves are used in particular for pre-classifying the screenings in order to separate off adhering, possibly even sticky or lubricating fine particles.
  • a finger sieve of the type mentioned is from the EP 0 103 831 B1 known.
  • the height offset of adjacent fingers on the front side of the traverse and the spread angle of adjacent fingers are so small in this screen, that in projection transverse to the traverse of the supposed intersection of the axes of adjacent fingers is located centrally in the interior of the traverse.
  • the sieve fingers attached to the crossbar are commonly arranged in parallel in a common plane. But it can also be every second Siebfinger with his Siebguttransportides rear end of the finger lower than the finger ends of the two adjacent fingers, so that adjacent fingers spread in Siebguttransportides.
  • the fingers are arranged in exact parallel alignment with each other alternately in two levels spaced apart from each other in height.
  • the object of the invention is to provide a finger sieve with an improved gap extension course.
  • a finger sieve according to claim 1, characterized in that in projection transverse to the traverse of the supposed intersection of the axes of adjacent fingers on the side facing away from the fingers of the traverse is outside the same.
  • This geometric condition determines a height offset of adjacent fingers on the front side of the crosshead and a spread angle of adjacent fingers, which are significantly larger than in the finger screen after the EP 0 103 831 B1 ,
  • the traverse represents dead screen surface. A person skilled in the art will therefore endeavor to make the traverse as narrow as possible.
  • the fingers engage the truss in two offset rows.
  • the fingers are round rods or round tubes.
  • the fingers are all of the same diameter.
  • the fingers of the lower row and the upper row are each of the same diameter.
  • a smaller diameter is recommended than for the fingers of the upper row. This results in a better vibration capability and higher natural frequency of the fingers of the lower row.
  • the finger rows on the front side of the traverse are offset in order of magnitude the finger diameter.
  • the height offset can also be smaller than the smallest finger diameter or larger than the largest finger diameter.
  • the spread angle of adjacent fingers is 1 ° to 7 °.
  • the finger sieve according to the invention basically requires no vibration drive. It can be operated as a passive sieve whose fingers are deflected only by the abandonment of Siebgut and vibrated. But can be provided for operation as an active screen and a motorized vibration drive, which sets the traverse in vibration.
  • the finger sieves have a traverse 10, from which an upper row sieve fingers 12, 14 and a lower row sieve fingers 16, 18, 20 protrude.
  • the fingers 12, 14; 16, 18, 20 in the rows are equidistant, oriented parallel and in the transport direction of the Siebguts.
  • the fingers 12, 14; 16, 18, 20 are staggered in rows. Traverses 10 are followed by a finger 16 in the lower row, a finger 12 in the upper row, a finger 18 in the lower row, and a finger 14 in the upper row, a finger 20 in the lower row, etc, on each other.
  • the fingers 12, 14 in the one row each sit centrally between the fingers 16, 18, 20 in the other row.
  • the fingers 12, 14, 16; 18, 20 are round rods of the same diameter.
  • the height offset D of the finger rows on the front side 22 of the traverse 10 corresponds in the variant according to Fig. 1 to Fig. 3 about this diameter. In the variant according to Fig. 4 to Fig. 6 is the height offset D larger.
  • the spread angle is 3 °.
  • the spread angle is 5 °.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Description

Die Erfindung betrifft ein Fingersieb mit wenigstens einer Traverse, von der in Transportrichtung des Siebguts sich erstreckende Finger auskragen, die vorn mit ihrer Fingerwurzel an der Traverse ansetzen und hinten ein freies Fingerende haben, wobei benachbarte Finger an der Frontseite der Traverse höhenversetzt sind und sich in Transportrichtung des Siebguts spreizen.The invention relates to a finger sieve with at least one traverse, projecting from the extending in the transport direction of Siebguts finger, the start with her finger root on the crossbar and behind a free finger end, with adjacent fingers are offset in height at the front of the traverse and in Spread the transport direction of the screenings.

Bei Fingersieben wird bekanntlich wenigstens ein Teil der Siebfläche von Siebfingern gebildet, die von einer Traverse auskragen und sich in Transportrichtung des Siebguts erstrecken. Die Finger setzen in Transportrichtung des Siebguts gesehen vorn mit ihrer Fingerwurzel an der Traverse an. Ihr in Transportrichtung gesehen hinteres Fingerende ist frei.In finger screens, at least part of the screen surface is known to be formed by screen fingers, which project from a traverse and extend in the transport direction of the screen material. The fingers put in the direction of transport of Siebguts seen front with her finger root on the crossbar. Your rear in the direction of transport seen end is free.

Dadurch, dass die Finger frei von der Traverse auskragen, sind sie schwingungsfähig. Fingersiebe sind speziell zum Klassieren schwieriger Siebgüter geeignet, die auf Maschinensieben mit herkömmlichen Maschen schnell zu Siebverstopfungen führen. Fingersiebe dienen insbesondere zum Vorklassieren des Siebguts, um daran anhaftende, eventuell gar klebende oder schmierende Feinpartikel abzutrennen.The fact that the fingers protrude freely from the crossbar, they are capable of vibration. Finger sieves are especially suitable for classifying difficult screening goods, which quickly lead to sieve blockages on machine screens with conventional meshes. Finger sieves are used in particular for pre-classifying the screenings in order to separate off adhering, possibly even sticky or lubricating fine particles.

Ein Fingersieb der eingangs genannten Art ist aus der EP 0 103 831 B1 bekannt. Der Höhenversatz benachbarter Finger an der Frontseite der Traverse und der Spreizwinkel benachbarter Finger sind bei diesem Sieb so gering, dass in Projektion quer zu der Traverse der vermeintliche Schnittpunkt der Achsen benachbarter Finger mittig im Innern der Traverse liegt.A finger sieve of the type mentioned is from the EP 0 103 831 B1 known. The height offset of adjacent fingers on the front side of the traverse and the spread angle of adjacent fingers are so small in this screen, that in projection transverse to the traverse of the supposed intersection of the axes of adjacent fingers is located centrally in the interior of the traverse.

Bei der DE 295 07 686 U1 sind die an der Traverse ansetzenden Siebfinger gemeinhin parallel in einer gemeinsamen Ebene angeordnet. Es kann aber auch jeder zweite Siebfinger mit seinem in Siebguttransportrichtung hinteren Fingerende tiefer liegen als die Fingerenden der beiden benachbarten Finger, so dass sich benachbarte Finger in Siebguttransportrichtung spreizen. In einer weiteren Variante sind die Finger in exakter Parallelausrichtung zueinander abwechselnd in zwei höhenmäßig voneinander beabstandeten Ebenen angeordnet.
Bei den Figersieben nach der EP 0 103 831 B1 und DE 295 07 686 U1 läßt der Verlauf der Spalterweiterung zwischen den sich spreizenden Siebfingern in Siebguttransportrichtung zu wünschen übrig. Aufgabe der Erfindung ist es, ein Fingersieb mit einem verbesserten Spalterweiterungsverlauf zu schaffen.In the DE 295 07 686 U1 the sieve fingers attached to the crossbar are commonly arranged in parallel in a common plane. But it can also be every second Siebfinger with his Siebguttransportrichtung rear end of the finger lower than the finger ends of the two adjacent fingers, so that adjacent fingers spread in Siebguttransportrichtung. In a further variant, the fingers are arranged in exact parallel alignment with each other alternately in two levels spaced apart from each other in height.
In the Figersieben after the EP 0 103 831 B1 and DE 295 07 686 U1 leaves the course of the gap extension between the expanding screen fingers in Siebguttransportrichtung to be desired. The object of the invention is to provide a finger sieve with an improved gap extension course.

Diese Aufgabe wird mit einem Fingersieb gemäß Anspruch 1 dadurch gelöst, dass in Projektion quer zu der Traverse der vermeintliche Schnittpunkt der Achsen benachbarter Finger auf der den Fingern abgewandten Seite der Traverse außerhalb derselben liegt.
Diese geometrische Bedingung bestimmt einen Höhenversatz benachbarter Finger an der Frontseite der Traverse und einen Spreizwinkel benachbarter Finger, die markant größer sind als bei dem Fingersieb nach der EP 0 103 831 B1 . Zum technischen Hintergrund anzumerken ist, dass die Traverse tote Siebfläche darstellt. Ein Fachmann wird daher bemüht sein, die Traverse möglichst schmal zu gestalten.
Bei einer bevorzugten Ausführungsform setzen die Finger in zwei höhenversetzten Reihen an der Traverse an.
Bei einer bevorzugten Ausführungsform sind die Finger Rundstäbe oder Rundrohre.
Bei einer bevorzugten Ausführungsform sind die Finger alle von gleichem Durchmesser.
Bei einer alternativ bevorzugten Ausführungsform sind die Finger der unteren Reihe und der oberen Reihe von jeweils gleichem Durchmesser. Für die Finger der unteren Reihe empfiehlt sich ein kleinerer Durchmesser, als für die Finger der oberen Reihe. Daraus resultiert eine bessere Schwingungsfähigkeit und höhere Eigenfrequenz der Finger der unteren Reihe.This object is achieved with a finger sieve according to claim 1, characterized in that in projection transverse to the traverse of the supposed intersection of the axes of adjacent fingers on the side facing away from the fingers of the traverse is outside the same.
This geometric condition determines a height offset of adjacent fingers on the front side of the crosshead and a spread angle of adjacent fingers, which are significantly larger than in the finger screen after the EP 0 103 831 B1 , To the technical background it should be noted that the traverse represents dead screen surface. A person skilled in the art will therefore endeavor to make the traverse as narrow as possible.
In a preferred embodiment, the fingers engage the truss in two offset rows.
In a preferred embodiment, the fingers are round rods or round tubes.
In a preferred embodiment, the fingers are all of the same diameter.
In an alternative preferred embodiment, the fingers of the lower row and the upper row are each of the same diameter. For the fingers of the lower row, a smaller diameter is recommended than for the fingers of the upper row. This results in a better vibration capability and higher natural frequency of the fingers of the lower row.

Bei einer bevorzugten Ausführungsform sind die Fingerreihen an der Frontseite der Traverse um größenordnungsmäßig den Fingerdurchmesser höhenversetzt. Dier Höhenversatz kann aber auch kleiner als der kleinste Fingerdurchmesser oder größer als der größte Fingerdurchmesser sein.In a preferred embodiment, the finger rows on the front side of the traverse are offset in order of magnitude the finger diameter. The height offset can also be smaller than the smallest finger diameter or larger than the largest finger diameter.

Bei einer bevorzugten Ausführungsform beträgt der Spreizwinkel benachbarter Finger 1° bis 7°.In a preferred embodiment, the spread angle of adjacent fingers is 1 ° to 7 °.

Das erfindungsgemäße Fingersieb bedarf grundsätzlich keines Vibrationsantriebs. Es kann als passives Sieb betrieben werden, dessen Finger nur durch das Aufgeben von Siebgut ausgelenkt und in Schwingung versetzt werden. Doch kann für einen Betrieb als aktives Sieb auch ein motorischer Vibrationsantrieb vorgesehen sein, der die Traverse in Schwingung versetzt.The finger sieve according to the invention basically requires no vibration drive. It can be operated as a passive sieve whose fingers are deflected only by the abandonment of Siebgut and vibrated. But can be provided for operation as an active screen and a motorized vibration drive, which sets the traverse in vibration.

Die Erfindung wird im folgenden anhand von zwei in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
die perspektivische Ansicht eines ersten Fingersiebs;
Fig. 2
eine Vorderansicht des ersten Fingersiebs;
Fig. 3
eine Seitenansicht des ersten Fingersiebs;
Fig. 4
die perspektivische Ansicht eines zweiten Fingersiebs;
Fig. 5
eine Vorderansicht des zweiten Fingersiebs; und
Fig. 6
eine Seitenansicht des zweiten Fingersiebs.
The invention is explained in more detail below with reference to two embodiments shown in the drawing. Show it:
Fig. 1
the perspective view of a first finger screen;
Fig. 2
a front view of the first Fingersiebs;
Fig. 3
a side view of the first Fingersiebs;
Fig. 4
the perspective view of a second finger screen;
Fig. 5
a front view of the second Fingersiebs; and
Fig. 6
a side view of the second Fingersiebs.

Die Fingersiebe haben eine Traverse 10, von der eine obere Reihe Siebfinger 12, 14 und eine untere Reihe Siebfinger 16, 18, 20 auskragen. Die Finger 12, 14; 16, 18, 20 in den Reihen sind äquidistant, parallel und in Transportrichtung des Siebguts orientiert.The finger sieves have a traverse 10, from which an upper row sieve fingers 12, 14 and a lower row sieve fingers 16, 18, 20 protrude. The fingers 12, 14; 16, 18, 20 in the rows are equidistant, oriented parallel and in the transport direction of the Siebguts.

Die Finger 12, 14; 16, 18, 20 sind reihenweise gestaffelt. An der Traverse 10 folgen jeweils ein Finger 16 in der unteren Reihe, ein Finger 12 in der oberen Reihe, ein Finger 18 in der unteren Reihe, ein Finger 14 in der oberen Reihe, ein Finger 20 in der unteren Reihe, u.s.w., aufeinander. Die Finger 12, 14 in der einen Reihe sitzen jeweils mittig zwischen den Fingern 16, 18, 20 in der anderen Reihe.The fingers 12, 14; 16, 18, 20 are staggered in rows. Traverses 10 are followed by a finger 16 in the lower row, a finger 12 in the upper row, a finger 18 in the lower row, and a finger 14 in the upper row, a finger 20 in the lower row, etc, on each other. The fingers 12, 14 in the one row each sit centrally between the fingers 16, 18, 20 in the other row.

Die Finger 12, 14, 16; 18, 20 sind Rundstäbe gleichen Durchmessers. Der Höhenversatz D der Fingerreihen an der Frontseite 22 der Traverse 10 entspricht in der Variante gemäß Fig. 1 bis Fig. 3 etwa diesem Durchmesser. In der Variante gemäß Fig. 4 bis Fig. 6 ist der Höhenversatz D größer.The fingers 12, 14, 16; 18, 20 are round rods of the same diameter. The height offset D of the finger rows on the front side 22 of the traverse 10 corresponds in the variant according to Fig. 1 to Fig. 3 about this diameter. In the variant according to Fig. 4 to Fig. 6 is the height offset D larger.

Benachbarte, zu der einen bzw. anderen Reihe gehörige Finger 12, 14; 16, 18, 20 spreizen sich in Transportrichtung des Siebguts auf. In der Variante gemäß Fig. 1 bis Fig. 3 beträgt der Spreizwinkel 3°. In der Variante gemäß Fig. 4 bis Fig. 6 beträgt der Spreizwinkel 5°.Neighboring fingers 12, 14 belonging to one row or another row; 16, 18, 20 spread in the transport direction of the screenings. In the variant according to Fig. 1 to Fig. 3 the spread angle is 3 °. In the variant according to Fig. 4 to Fig. 6 the spread angle is 5 °.

Liste der BezugszeichenList of reference numbers

1010
Traversetraverse
1212
SiebfingerSiebfinger
1414
SiebfingerSiebfinger
1616
SiebfingerSiebfinger
1818
SiebfingerSiebfinger
2020
SiebfingerSiebfinger
2222
Frontseitefront

Claims (9)

  1. Finger screen having at least one cross-member (10), from which there protrude fingers (12, 14; 16, 18, 20) which extend in the transport direction of the screened material and which are attached at the front with their finger roots to the cross-member (10) and which at the rear have a free finger end, wherein adjacent fingers (12, 14; 16, 18, 20) are vertically offset at the front side (22) of the cross-member (10) and are splayed in the transport direction of the screened material in such a manner that as a projection transversely relative to the cross-member (10) the notional intersection of the axes of adjacent fingers (12, 14; 16, 18, 20) is located at the side of the cross-member (10) facing away from the fingers (12, 14; 16, 18, 20) at the outer side thereof.
  2. Finger screen according to claim 1, characterised in that the fingers (12, 14; 16, 18, 20) are attached in two rows which are vertically offset in a staggered manner to the cross-member (10).
  3. Finger screen according to claim 1 or 2, characterised in that the fingers (12, 14; 16, 18, 20) are round rods or round pipes.
  4. Finger screen according to claim 3, characterised in that the fingers (12, 14; 16, 18, 20) all have the same diameter.
  5. Finger screen according to claim 2 and 3, characterised in that the fingers (12, 14; 16, 18, 20) of the lower row and the upper row are each of the same diameter.
  6. Finger screen according to claim 5, characterised in that the diameter of the fingers (16, 18, 20) in the lower row is smaller than the diameter of the fingers (12, 14) in the upper row.
  7. Finger screen according to any one of claims 3 to 6, characterised in that the finger rows at the front side (22) of the cross-member (10) are vertically offset by an order of magnitude of the finger diameter.
  8. Finger screen according to any one of claims 1 to 7, characterised in that the splaying angle of adjacent fingers (12, 14; 16, 18, 20) is from 1° to 7°.
  9. Finger screen according to any one of claims 1 to 8, characterised in that the cross-member (10) can be caused to vibrate in a motorised manner.
EP17000705.8A 2016-07-25 2017-04-25 Finger screen Active EP3275562B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202016104053.1U DE202016104053U1 (en) 2016-07-25 2016-07-25 finger screen

Publications (2)

Publication Number Publication Date
EP3275562A1 EP3275562A1 (en) 2018-01-31
EP3275562B1 true EP3275562B1 (en) 2018-12-05

Family

ID=56937403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17000705.8A Active EP3275562B1 (en) 2016-07-25 2017-04-25 Finger screen

Country Status (2)

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EP (1) EP3275562B1 (en)
DE (1) DE202016104053U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122579A1 (en) 2016-11-23 2018-05-24 Georg Schons Device and Münzaussierierverfahren for sorting coins from a metal fill
CN112246647A (en) * 2020-08-27 2021-01-22 南京昌合泰智能科技有限公司 Steel ball screening device and method for bearing machining

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1334579A (en) * 1919-02-13 1920-03-23 Herman F Wullstein Screen
SE321400B (en) * 1964-07-01 1970-03-02 F Mogensen
DE3234437A1 (en) 1982-09-17 1984-03-22 Mogensen Gmbh & Co Kg, 2000 Wedel SCREEN DEVICE, IN PARTICULAR FOR SCREEN DIFFICULT MATERIALS
DE29507686U1 (en) 1995-05-10 1995-07-27 Texpan Spa Device for classifying spreadable material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE202016104053U1 (en) 2016-08-30
EP3275562A1 (en) 2018-01-31

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