EP0350830B1 - Screening machine - Google Patents

Screening machine Download PDF

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Publication number
EP0350830B1
EP0350830B1 EP89112565A EP89112565A EP0350830B1 EP 0350830 B1 EP0350830 B1 EP 0350830B1 EP 89112565 A EP89112565 A EP 89112565A EP 89112565 A EP89112565 A EP 89112565A EP 0350830 B1 EP0350830 B1 EP 0350830B1
Authority
EP
European Patent Office
Prior art keywords
cross members
cross
screening machine
eccentric
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89112565A
Other languages
German (de)
French (fr)
Other versions
EP0350830A3 (en
EP0350830A2 (en
Inventor
Horst Klaes
Kurt Hoppe
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.)
HEIN LEHMANN TRENN- und FOERDERTECHNIK GmbH
Original Assignee
Hein Lehmann Trenn und Fordertechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hein Lehmann Trenn und Fordertechnik GmbH filed Critical Hein Lehmann Trenn und Fordertechnik GmbH
Priority to AT89112565T priority Critical patent/ATE93420T1/en
Publication of EP0350830A2 publication Critical patent/EP0350830A2/en
Publication of EP0350830A3 publication Critical patent/EP0350830A3/en
Application granted granted Critical
Publication of EP0350830B1 publication Critical patent/EP0350830B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48—Stretching devices for screens
    • B07B1/485—Devices for alternately stretching and sagging screening surfaces

Definitions

  • the invention relates to a screening machine with a plurality of parallel cross-members arranged in parallel and at intervals, between which flexible screen linings are fastened and of which every second cross-member moves relative to the other intermediate second cross-members in order to alternately stretch and compress the screen linings, all of which Cross beams are moved in a circle by an imbalance.
  • the object of the invention is to improve a screening machine of the type mentioned in such a way that it is structurally simple and achieves high screening performance.
  • the structurally very simple unbalance drive takes over the movement of the second crossbeams in between, so that a movable bearing is only required for the directly driven crossbeams.
  • the other cross members can be fastened to machine parts, in particular to the screen box, which is moved by the eccentric.
  • Construction and drive are particularly simplified if the imbalance is attached to a shaft that drives the first crossbeam with at least one eccentric. It is preferably proposed that the shaft be mounted in the machine parts, in particular the screen box, to which the second cross members are attached.
  • the screening machine has a screen box with two side cheeks 1, 2, which run perpendicular and parallel to one another and between which the cross members 3, 4 are at right angles. While the first cross members 3 are rotatably mounted on the side cheeks, the second cross members 4 located therebetween are immovably fixed on the side cheeks 1, 2. The first and second cross members 3, 4 alternate with each other, so that when the first cross member 3 swings back and forth, the flexible screen mats 5 located above the cross members 3, 4 are alternately stretched and compressed.
  • the drive axis of the first cross member 3 are inserted through both side cheeks 1, 2 and fastened there to rocker arms 6 which are essentially vertical and are fastened with their upper sides to a coupling rod 7.
  • the coupling rod is in turn connected via a joint rod to a ring element 9 which is fastened on an eccentric 10 .
  • the eccentric 10 sits on a shaft 11 which is driven by an electric motor 13 via a gear 12.
  • the electric motor 13 thus generates a regular swiveling back and forth of the cross members 3 about their longitudinal axes via the aforementioned members.
  • the shaft 11 with the two end-side eccentrics 10 is approximately in the center of gravity the machine arranged parallel to the cross beams, so that on both sides of the shaft 11 and the eccentric 10 joint rods 8 and coupling rods 7 are arranged, with a coupling rod 7 one half of the cross beams 3 and the other opposite horizontal coupling rod 7 the other half of the cross beams 3 drives via rocker arm 6.
  • Sector-shaped unbalance elements 14 are fastened on the shaft 11, which is rotatably mounted in the side cheeks 1, 2, on both outer sides of the side cheeks 1, 2, which are rotationally adjustable with respect to the shaft and thus also the eccentrics 10.
  • these unbalance elements 14, both of which are set at the same angle and thus parallel to one another, the entire screen box is set in vibration.
  • the underside of the screen box or the undersides of both side cheeks 1, 2 are placed on elastic bearings 15, in particular spring elements.
  • the cross members 4 are placed in circular vibrations exactly or approximated, which also superimpose the oscillating movements of the cross members 3, since these cross members 3 are also exposed to the circular vibrations. This not only improves the screening performance and transport of the material to be screened, it also increases self-cleaning.
  • the supports 4 located in between can also be driven in a tilting manner by a second tilting drive.
  • eccentrics can be attached to the shaft of the second tilt drive.
  • FIGS. 3 and 4 differs from that according to FIGS. 1 and 2 in that the cross members 3 are connected to one another by lateral bars 16 are connected, which move parallel to the longitudinal direction of the screening machine with respect to the side walls.
  • the spars 16 rest on vertical links 17.
  • these reciprocating links 17 can also be inclined relative to the spars in order to additionally support the transport of the material to be screened.
  • the screening machine is also possible to design the screening machine as a double deck, i.e. Arrange and drive two screen surfaces with the first and second cross members in parallel one above the other.
  • a second screen deck can also be fastened over the driven screen deck according to FIG. 1 or FIG. 3, the cross member of which is driven only via the unbalance and which serves as a protective deck with larger opening widths.

Abstract

A screening machine with a plurality of cross-members 3,4 arranged in parallel next to one another at intervals, between which flexible screening covers 5 are fastened and of which every second cross-member 3 moves in relation to the other cross-members 4 lying between them, in order alternately to stretch and to jolt the screen covers 5, the second cross-members 4 lying between them being displaced approximately in circulatory vibrations by a flyweight 14. <IMAGE>

Description

Die Erfindung betrifft eine Siebmaschine mit mehreren parallel nebeneinander und in Abständen angeordneten Querträgern, zwischen denen flexible Siebbeläge befestigt sind und von denen jeder zweite Querträger sich relativ zu den übrigen dazwischen liegenden zweiten Querträgern bewegt, um die Siebbeläge abwechselnd zu strecken und zu stauchen, wobei alle Querträger durch eine Unwucht kreisförmig bewegt werden.The invention relates to a screening machine with a plurality of parallel cross-members arranged in parallel and at intervals, between which flexible screen linings are fastened and of which every second cross-member moves relative to the other intermediate second cross-members in order to alternately stretch and compress the screen linings, all of which Cross beams are moved in a circle by an imbalance.

Es sind Siebmaschinen mit Querträgern bekannt, bei denen jeder zweite Querträger einem Bewegungssystem angehört und die dazwischen befindlichen Querträger einem zweiten Bewegungssystem.Screening machines with cross members are known in which every second cross member belongs to a movement system and the cross members located between them belong to a second movement system.

Aufgabe der Erfindung ist es, eine Siebmaschine der eingangs genannten Art so zu verbessern, daß sie konstruktiv einfach ist und hohe Siebleistungen erreicht.The object of the invention is to improve a screening machine of the type mentioned in such a way that it is structurally simple and achieves high screening performance.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die zweiten Querträger zum Erzeugen einer Kippbewegung über Stäbe von einem Exzenter zwangsangetrieben sind und daß Unwucht und Exzenter relativ zueinander drehverstellbar sind.This object is achieved in that the second cross members are positively driven by an eccentric to produce a tilting movement via rods and that the unbalance and eccentric are rotatably adjustable relative to each other.

Der konstruktiv sehr einfache Unwuchtantrieb übernimmt die Bewegung der dazwischen liegenden zweiten Querträger, so daß eine bewegliche Lagerung nur noch für die direkt angetriebenen Querträger erforderlich ist. Die übrigen Querträger können dagegen an Maschinenteilen, insbesondere am Siebkasten, befestigt sein, der durch den Exzenter bewegt wird.The structurally very simple unbalance drive takes over the movement of the second crossbeams in between, so that a movable bearing is only required for the directly driven crossbeams. The other cross members, however, can be fastened to machine parts, in particular to the screen box, which is moved by the eccentric.

Es läßt sich nicht nur die Größe der Unwucht verstellen, sondern es können auch siebtechnische Probleme dadurch gelöst werden, daß Unwucht und Exzenter relativ zueinander drehverstellbar sind.Not only can the size of the unbalance be adjusted, but also sieving problems can be solved in that the unbalance and eccentric can be rotated relative to one another.

Konstruktion und Antrieb werden besonders dann vereinfacht, wenn die Unwucht auf einer Welle befestigt ist, die mit mindestens einem Exzenter die ersten Querträger antreibt. Vorzugsweise wird vorgeschlagen, daß die Welle in den Maschinenteilen, insbesondere dem Siebkasten, gelagert ist, an denen die zweiten Querträger befestigt sind.Construction and drive are particularly simplified if the imbalance is attached to a shaft that drives the first crossbeam with at least one eccentric. It is preferably proposed that the shaft be mounted in the machine parts, in particular the screen box, to which the second cross members are attached.

Eine optimale Kräfteverteilung wird dann erreicht, wenn die Welle im Schwerpunkt des Siebkastens gelagert ist.An optimal distribution of forces is achieved when the shaft is supported in the center of gravity of the screen box.

Zwei Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben. Es zeigen:

Fig. 1
einen senkrechten Längsschnitt durch ein erstes Ausführungsbeispiel;
Fig. 2
einen Schnitt nach A-A in Fig. 1;
Fig. 3
einen senkrechten Längsschnitt durch ein zweites Ausführungsbeispiel; und
Fig. 4
einen Schnitt nach A-A in Fig. 3.
Two embodiments of the invention are shown in the drawings and are described in more detail below. Show it:
Fig. 1
a vertical longitudinal section through a first embodiment;
Fig. 2
a section along AA in Fig. 1;
Fig. 3
a vertical longitudinal section through a second embodiment; and
Fig. 4
a section along AA in Fig. 3rd

Die Siebmaschine weist einen Siebkasten mit zwei Seitenwangen 1, 2 auf, die senkrecht und zueinander parallel verlaufen und zwischen denen rechtwinklig die Querträger 3, 4 liegen. Während die ersten Querträger 3 an den Seitenwangen drehbeweglich gelagert sind, sind die dazwischen befindlichen zweiten Querträger 4 an den Seitenwangen 1, 2 unbeweglich fest. Die ersten und zweiten Querträger 3, 4 wechseln einander ab, so daß bei einer schwenkenden Hin- und Herbewegung der ersten Querträger 3 die oberhalb der Querträger 3, 4 befindlichen flexiblen Siebmatten 5 abwechselnd gestreckt und gestaucht werden.The screening machine has a screen box with two side cheeks 1, 2, which run perpendicular and parallel to one another and between which the cross members 3, 4 are at right angles. While the first cross members 3 are rotatably mounted on the side cheeks, the second cross members 4 located therebetween are immovably fixed on the side cheeks 1, 2. The first and second cross members 3, 4 alternate with each other, so that when the first cross member 3 swings back and forth, the flexible screen mats 5 located above the cross members 3, 4 are alternately stretched and compressed.

Die Antriebsachse der ersten Querträger 3 sind durch beide Seitenwangen 1, 2 hindurchgesteckt und dort an Kipphebeln 6 befestigt, die im wesentlichen senkrecht stehen und mit ihren Oberseiten an einer Koppelstange 7 befestigt sind. Die Koppelstange ist wiederum über einen Gelenkstab mit einem Ringelement 9 verbunden, das auf einem Exzenter 10 befestigt ist. Der Exzenter 10 sitzt auf einer Welle 11, die über ein Getriebe 12 von einem Elektromotor 13 angetrieben ist. Damit erzeugt der Elektromotor 13 über die vorgenannten Glieder ein regelmäßiges Hin- und Herschwenken der Querträger 3 um ihre Längsachsen.The drive axis of the first cross member 3 are inserted through both side cheeks 1, 2 and fastened there to rocker arms 6 which are essentially vertical and are fastened with their upper sides to a coupling rod 7. The coupling rod is in turn connected via a joint rod to a ring element 9 which is fastened on an eccentric 10 . The eccentric 10 sits on a shaft 11 which is driven by an electric motor 13 via a gear 12. The electric motor 13 thus generates a regular swiveling back and forth of the cross members 3 about their longitudinal axes via the aforementioned members.

Im Ausführungsbeispiel ist die Welle 11 mit den zwei endseitigen Exzentern 10 mittig angenähert im Schwerpunkt der Maschine parallel zu den Querträgern angeordnet, so daß zu beiden Seiten der Welle 11 und der Exzenter 10 Gelenkstäbe 8 und Koppelstangen 7 angeordnet sind, wobei eine Koppelstange 7 die eine Hälfte der Querträger 3 und die andere gegenüberliegende waagerechte Koppelstange 7 die andere Hälfte der Querträger 3 über Kipphebel 6 antreibt.In the exemplary embodiment, the shaft 11 with the two end-side eccentrics 10 is approximately in the center of gravity the machine arranged parallel to the cross beams, so that on both sides of the shaft 11 and the eccentric 10 joint rods 8 and coupling rods 7 are arranged, with a coupling rod 7 one half of the cross beams 3 and the other opposite horizontal coupling rod 7 the other half of the cross beams 3 drives via rocker arm 6.

Auf der Welle 11, die in den Seitenwangen 1, 2 drehbar gelagert ist, sind auf beiden Außenseiten der Seitenwangen 1, 2 sektorförmige Unwuchtelemente 14 befestigt, die gegenüber der Welle und damit auch den Exzentern 10 drehverstellbar sind. Durch diese Unwuchtelemente 14, die beide im selben Winkel, und damit zueinander parallel eingestellt sind, wird der gesamte Siebkasten in Schwingungen gesetzt. Hierzu ist die Unterseite des Siebkastens bzw. sind die Unterseiten beider Seitenwangen 1, 2 auf elastische Lager 15, insbesondere Federelemente, gestellt.Sector-shaped unbalance elements 14 are fastened on the shaft 11, which is rotatably mounted in the side cheeks 1, 2, on both outer sides of the side cheeks 1, 2, which are rotationally adjustable with respect to the shaft and thus also the eccentrics 10. By means of these unbalance elements 14, both of which are set at the same angle and thus parallel to one another, the entire screen box is set in vibration. For this purpose, the underside of the screen box or the undersides of both side cheeks 1, 2 are placed on elastic bearings 15, in particular spring elements.

Durch die Unwucht 14 werden die Querträger 4 exakt oder angenähtert in Kreisschwingungen versetzt, die darüber hinaus die Schwingbewegungen der Querträger 3 überlagern, da auch diese Querträger 3 den Kreisschwingungen ausgesetzt sind. Es werden damit nicht nur Siebleistung und Transport des Siebgutes verbessert, sondern es wird auch die Selbstreinigung erhöht.Due to the unbalance 14, the cross members 4 are placed in circular vibrations exactly or approximated, which also superimpose the oscillating movements of the cross members 3, since these cross members 3 are also exposed to the circular vibrations. This not only improves the screening performance and transport of the material to be screened, it also increases self-cleaning.

In einer nicht dargestellten Alternative können auch die dazwischen liegenden Träger 4 kippbeweglich durch einen zweiten Kippantrieb angetrieben sein. Auch hier können auf der Welle des zweiten Kippantriebs Exzenter befestigt werden.In an alternative, not shown, the supports 4 located in between can also be driven in a tilting manner by a second tilting drive. Here too, eccentrics can be attached to the shaft of the second tilt drive.

Das Ausführungsbeispiel nach den Figuren 3 und 4 unterscheidet sich von dem nach den Figuren 1 und 2 dadurch, daß die Querträger 3 durch seitliche Holme 16 miteinander verbunden sind, die sich gegenüber den Seitenwänden parallel zur Siebmaschinenlängsrichtung bewegen. Hierbei liegen die Holme 16 auf senkrechten Lenkern 17 auf. Diese hin- und herschwingenden Lenker 17 können aber auch gegenüber den Holmen schräggestellt sein, um den Transport des Siebgutes zusätzlich zu unterstützen.The exemplary embodiment according to FIGS. 3 and 4 differs from that according to FIGS. 1 and 2 in that the cross members 3 are connected to one another by lateral bars 16 are connected, which move parallel to the longitudinal direction of the screening machine with respect to the side walls. Here, the spars 16 rest on vertical links 17. However, these reciprocating links 17 can also be inclined relative to the spars in order to additionally support the transport of the material to be screened.

Weiterhin ist es möglich, die Siebmaschine als Doppeldeck auszuführen, d.h. zwei Siebflächen mit ersten und zweiten Querträgern parallel übereinander anzuordnen und anzutreiben. Ferner kann aber auch über dem angetriebenen Siebdeck nach Fig. 1 oder Fig. 3 ein zweites Siebdeck befestigt werden, dessen Querträger nur über die Unwucht angetrieben sind und das mit größeren Öffnungsweiten als Schondeck dient.It is also possible to design the screening machine as a double deck, i.e. Arrange and drive two screen surfaces with the first and second cross members in parallel one above the other. Furthermore, a second screen deck can also be fastened over the driven screen deck according to FIG. 1 or FIG. 3, the cross member of which is driven only via the unbalance and which serves as a protective deck with larger opening widths.

Claims (4)

  1. A screening machine having a number of spaced-out cross members (3, 4) which are disposed in parallel one beside the other and between which flexible screen linings (5) are attached, each second cross member (3) moving in relation to the other cross members (4) disposed therebetween in order to alternately stretch and compress the screen linings (5), all the cross members (4) being moved in a circle by an unbalanced element (14), characterized in that the second cross members are constrainedly driven via rods (6, 7, 8) by an eccentric (10) to produce a tilting movement, and the unbalanced element (14) and the eccentric can be rotatably adjusted in relation to one another.
  2. A screening machine according to claim 1, characterized in that the unbalanced element (14) is attached to a shaft (11) which drives the first cross members (3) with at least one eccentric (10).
  3. A screening machine according to claims 1 or 2, characterized in that the shaft (11) is mounted in the machine parts, more particularly the screen box (1, 2), to which the second cross members (14) are attached.
  4. A screening machine according to claims 2 or 3, characterized in that the shaft (11) is mounted at the centre of gravity of the screen box (1, 2).
EP89112565A 1988-07-14 1989-07-10 Screening machine Expired - Lifetime EP0350830B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89112565T ATE93420T1 (en) 1988-07-14 1989-07-10 SCREENING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823896 1988-07-14
DE3823896A DE3823896A1 (en) 1988-07-14 1988-07-14 SCREENING MACHINE

Publications (3)

Publication Number Publication Date
EP0350830A2 EP0350830A2 (en) 1990-01-17
EP0350830A3 EP0350830A3 (en) 1990-12-27
EP0350830B1 true EP0350830B1 (en) 1993-08-25

Family

ID=6358673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112565A Expired - Lifetime EP0350830B1 (en) 1988-07-14 1989-07-10 Screening machine

Country Status (4)

Country Link
EP (1) EP0350830B1 (en)
JP (1) JPH02169073A (en)
AT (1) ATE93420T1 (en)
DE (2) DE3823896A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112170173A (en) * 2020-09-22 2021-01-05 张百顺 Preparation method of concrete water reducing agent

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06107315A (en) * 1992-09-29 1994-04-19 Matsuura Kikai Seisakusho:Kk Conveyor
AT175U1 (en) * 1994-05-20 1995-04-25 Eduard Mannsberger Ges M B H I SWINGING OR SHAKER SCREEN ARRANGEMENT
CN103623997B (en) * 2013-11-30 2016-03-02 信宜市恒大机械设备厂 Vibratory sieve
CN107931114B (en) * 2017-12-25 2020-12-11 泾阳中昊建材有限责任公司 Rotating screening type sand and stone treatment device
CN108526005A (en) * 2018-04-19 2018-09-14 张慧芳 A kind of vibrating screen for granular materials optional equipment with intermittent feeding function
DE102020002308B3 (en) * 2020-03-06 2020-12-03 WIMA Wilsdruffer Maschinen- und Anlagenbau GmbH Sieve device, in particular flip-flop sieve device
CN112191510A (en) * 2020-10-19 2021-01-08 安徽黎搏装饰工程有限公司 Screening plant for construction
CN114226223A (en) * 2021-11-02 2022-03-25 佛山市交通科技有限公司 Asphalt mixture screening device

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Publication number Priority date Publication date Assignee Title
DE1206372B (en) * 1964-09-26 1965-12-09 Albert Wehner Screen grate
DE1275339B (en) * 1967-07-13 1968-08-14 Albert Wehner Sieving machine
JPS4713022U (en) * 1971-03-16 1972-10-16
DE2158128C3 (en) * 1971-11-24 1980-06-04 Hein, Lehmann Ag, 4000 Duesseldorf Sieve device
JPS5551578U (en) * 1978-09-30 1980-04-04
JPS592545A (en) * 1982-06-24 1984-01-09 Mitsubishi Electric Corp Manufacture of yoke
AT384961B (en) * 1983-04-11 1988-02-10 Binder Co Ag SCREEN DEVICE
DE3512215A1 (en) * 1985-04-03 1986-10-16 Carl Schenck Ag, 6100 Darmstadt SCREENING MACHINE WITH A FLEXIBLE SCREENING

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112170173A (en) * 2020-09-22 2021-01-05 张百顺 Preparation method of concrete water reducing agent
CN112170173B (en) * 2020-09-22 2021-07-20 灵山县建灵投资有限公司 Preparation method of concrete water reducing agent

Also Published As

Publication number Publication date
EP0350830A3 (en) 1990-12-27
JPH02169073A (en) 1990-06-29
ATE93420T1 (en) 1993-09-15
DE58905369D1 (en) 1993-09-30
EP0350830A2 (en) 1990-01-17
DE3823896A1 (en) 1990-01-18

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