EP0418929B1 - Suction device - Google Patents

Suction device Download PDF

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Publication number
EP0418929B1
EP0418929B1 EP90118219A EP90118219A EP0418929B1 EP 0418929 B1 EP0418929 B1 EP 0418929B1 EP 90118219 A EP90118219 A EP 90118219A EP 90118219 A EP90118219 A EP 90118219A EP 0418929 B1 EP0418929 B1 EP 0418929B1
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EP
European Patent Office
Prior art keywords
suction
unit according
filter
filter means
cleaning
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EP90118219A
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German (de)
French (fr)
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EP0418929A2 (en
EP0418929A3 (en
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Manfred Sohler
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Individual
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H11/00—Arrangements for confining or removing dust, fly or the like
    • D01H11/005—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices

Definitions

  • the invention relates to a suction unit equipped with two fans, according to the preamble of claim 1.
  • suction units equipped with two blowers have become known, which have various advantages with regard to the flexibility of the available suction or blowing power.
  • suction units equipped with two blowers have become known, which have various advantages with regard to the flexibility of the available suction or blowing power.
  • This solution offers the advantage that it is possible to work with continuous cleaning power if the appropriate blower is alternately switched on and the other blower is either switched off or is operated in the cleaning operation immediately after the associated suction cycle has ended, so that the fiber fly that occurs had accumulated in the associated filter device, can be removed at comparatively short intervals.
  • a filter device that is always well cleaned has the advantage that a high suction power is available in relation to the energy input.
  • blower with a high differential pressure and low delivery volume and a further blower with a low differential pressure and large delivery volume.
  • Such a generic suction unit offers the possibility of providing an increased cleaning effect in a targeted manner at places of greater soiling and, moreover, of sucking up large quantities of fiber fly with the low-pressure blower.
  • suction unit according to the preamble of claim 1, which is suitable for cleaning very differently contaminated areas of a textile machine, can work in a fast cleaning cycle and its susceptibility to malfunction is reduced.
  • a particularly favorable effect results from the combination of the drawing roller suction in the high pressure area with the suction of the other fiber fly in the low pressure area.
  • the relatively fat-containing fiber fly from the stretching roller area is deposited practically alternately in layers with the fat-free or low-fat fiber fly from the low-pressure circuit in the collecting container. It has been found to be surprisingly particularly favorable that the fat content is automatically equalized via the fat-free and fat-containing layers in the collecting container, so that the fiber fly is practically automatically adjusted to the desired average fat content. Very slightly greasy fibers tend less to compress so much that they stick to the walls and bottom of the collecting container.
  • the collected fiber fly can also be reused.
  • a switching device such as a flap which is in the (normal) suction mode for each circuit in the closed state, but which opens automatically in the filter cleaning mode.
  • the decoupling of the cleaning is hereby provided, wherein it can easily be avoided by means of a mechanical switching element, but for example also by means of corresponding microswitches, that both circuits work simultaneously in the filter cleaning mode.
  • This modification offers particular advantages if both reuse of very fatty fiber fly and non-fatty fiber fly is possible, with corresponding measures for separate reuse or regeneration being required.
  • a suction unit 10 according to the invention has a high-pressure circuit 14 and a low-pressure circuit 12.
  • Each of the circuits is equipped with a blower, which is not shown in FIG. 1, the blower for the high pressure circuit 14 for a large pressure difference and a comparatively low delivery volume and the blower for the low pressure circuit 12 for a high delivery volume and a comparatively low pressure difference is designed.
  • the low-pressure circuit 12 has a suction channel 16, which extends from a suction connection 18 via a suction chamber 20 through a filter device 22 to a blower connection 24, to which the low-pressure blower is connected with its suction side.
  • the filter device 22 is here suspended in a filter holding frame 26 and flows through from bottom to top. It is arranged in the upper region of the suction space 20, which, like the filter device 22, has a comparatively large flow cross section. As a result, the flow velocity of the suction air flow is greatly reduced in a manner known per se, for example to one tenth of the flow velocity in the suction connection 18.
  • the filter device 22 which extends essentially horizontally, is comparatively smooth on its suction side 28, so that accumulating fiber fly is easy in the cleaning operation is solvable.
  • the suction connection 18 has an axis 30 which extends essentially horizontally and runs clearly below the filter device 22.
  • a non-return flap 32 is provided between the suction connection 18 and the suction space 20 and is pivotally mounted on a swivel bearing 34 just above the suction connection.
  • the possible pivoting movement of the check valve 32 is limited on the one hand by the suction connection 18 and on the other hand by an impact surface 36, so that the check valve 32 extends from the vertical position, in which the suction connection 18 is essentially not closed, to an oblique position of somewhat more can extend as 45 °.
  • the baffle 36 is comparatively stable, so that it forms a hard stop for the check valve 32.
  • the suction air stream emerging from the suction connection 18, which is enriched with fiber fly, is deflected obliquely / downwards by the baffle surface 36 and the non-return flap 32 which forms an extension of the baffle surface 36 so that it reaches the opposite area of the suction chamber. Due to the large diameter of the suction space 20, the flow is calmed and evened out, so that a large part of the fiber flight carried settles on the bottom of the suction space 20.
  • the bottom of the suction space 20 is in turn formed by a cleaning flap 38 which is mounted on a further pivot bearing 40 and can be pivoted from the horizontal position in which it forms a bottom of the substantially sealed suction space 20 into an almost vertical position which cleaning operation is possible.
  • the cleaning flap 38 is closed, i.e. in the horizontal position in which it forms a floor for the suction space 20.
  • the check valve 32 In suction operation of the low-pressure circuit 12, the check valve 32 is also pulled into the inclined position by the action of the low-pressure blower, in which it rests on the baffle surface 36. A middle position between this position and the closed position (cleaning operation) of the check valve 32 is indicated by dashed lines in FIG. 1.
  • a filter cake (not shown) accumulates at the bottom of the filter device 22, which increases the suction resistance and reduces the flow speed of the low-pressure circuit.
  • the system switches over to filter cleaning operation.
  • the suction air flow from the blower connection 24 is interrupted by flaps (not shown) and a blown air flow is passed via a cleaning connection 42 shown in broken lines, which opens into the suction space 20 above the filter device 22.
  • the blown air flow creates an overpressure in the suction chamber 20, which leads to the non-return flap 32 and the cleaning flap 38 each moving into the other position: the non-return flap 32 is thrown into the position sealing the suction port 18 and the cleaning flap 38 into that almost vertical position.
  • the blown air stream removes the filter cake located at the bottom of the filter device 22 and initially adheres there and reaches a collecting container 44 which is located below the suction space.
  • the diameter of the collecting container 44 corresponds approximately to that of the suction chamber, so that there is a low flow velocity and the filter cake finally settles there.
  • the high-pressure circuit 14 is provided with corresponding elements, so that suction operation and filter cleaning operation are also possible there.
  • the individual construction elements of the high-pressure circuit 14 are designated accordingly to the construction elements of the low-pressure circuit 12, the respective reference number being increased by 100 to distinguish them.
  • the suction channel 16 of the low-pressure circuit thus corresponds to a suction channel 116 of the high-pressure circuit, etc.
  • the collecting container 44 is common to both circles. The suction operation can be carried out decoupled from one another for the high pressure circuit 14 and for the low pressure circuit 12. However, simultaneous filter cleaning operation of the high pressure circuit 14 and the low pressure circuit 12 should be avoided as far as possible.
  • the circles 12 and 14 are combined via a common housing 46 which extends downwards, i.e.
  • a somewhat lengthened cleaning channel 148 is provided for the filter cleaning operation of the high pressure circuit 14, which has a diameter essentially corresponding to the suction chamber 120 and opens into the collecting container 44.
  • the flow diameter of the collecting container 44 is considerably larger than the diameter of the cleaning channel 148.
  • FIG. 2 shows a further embodiment with a double-acting valve flap.
  • the low-pressure blower 50 extends above the blower connection 24 and the high-pressure blower 150 extends above the blower connection 124.
  • FIG. 3 shows a third embodiment, which differs from the embodiment shown in FIGS. 1 and 2 by the special design of the high pressure circuit 14.
  • the high pressure circuit 14 is practically divided into two high pressure circuits 14A and 14B, the high pressure circuit 14A being the high pressure circuit 14 corresponds to FIG. 1.
  • the high-pressure circuit 14B has parts corresponding to the high-pressure circuit 14A, the reference symbols of which, for the sake of simplicity, are each increased by 100 compared to the reference symbols of the high-pressure circuit 14A (or 14 in FIGS. 1 and 2).
  • a slide 52 is provided which extends between the filter devices 222 and 122 and the high pressure blower 150 and optionally switches on one of the two high pressure circuits 14A and 14B.
  • the high-pressure circuit 14B is equipped with a collecting container 54, which is used to hold particularly contaminated fiber fly.
  • the collecting container 44 is provided for the reuse of the fiber fly collected there, while the fiber fly collected in the collecting container 54 is to be disposed of separately.
  • the suction connections 118 and 218 are each provided at suitable locations below the filter devices 122 and 222, the suction connection 222 being connected to a suction mouthpiece for greasy fiber fly.
  • the slide 52 is coupled to a switching device in such a way that the high-pressure circuit 14A or 14B which is in each case switched off is put into cleaning operation.
  • a switching device for this purpose, some air is branched off from the low-pressure circuit 12 via a corresponding switching device, so that the filter devices 122 and 222 can be cleaned quite intensively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Cleaning In General (AREA)
  • Massaging Devices (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Manipulator (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)

Abstract

In a suction device for textile-machine cleaning, which is equipped with two blowers and the suction connection of which is connected respectively to a filter arrangement, one blower works at a high differential pressure and low feed volume and a further blower works at a low differential pressure and high feed volume, and the filter arrangements can be emptied for cleaning purposes by reversing the air flow, the filter arrangements (22, 122) being assigned to a collecting container (44, 54), by means of which the collected filter cakes can be treated. <IMAGE>

Description

Die Erfindung betrifft ein mit zwei Gebläsen ausgestattetes Saugaggregat, gemäß dem Oberbegriff von Anspruch 1.The invention relates to a suction unit equipped with two fans, according to the preamble of claim 1.

Bei der Reinigung von Textilmaschinen sind mit zwei Gebläsen ausgestattete Saugaggregate bekannt geworden, die verschiedene Vorteile hinsichtlich der Flexibilität der zur Verfügung stehenden Saug- bzw. Blasleistung aufweisen. Beispielsweise ist es bekannt geworden, zwei gleichartige Gebläse mit getrennten Saugkreisen und je getrennten Filtereinrichtungen vorzusehen, die wechselseitig einschaltbar sind. Diese Lösung bietet den Vorteil, daß mit kontinuierlicher Reinigungskraft gearbeitet werden kann, wenn abwechselnd das je geeignete Gebläse eingeschaltet ist und das andere Gebläse entweder abgeschaltet ist oder, unmittelbar nach Abschluß des zugehörigen Saugzyklus, im Reinigungsbetrieb gefahren wird, so daß der Faserflug, der sich in der zugehörigen Filtereinrichtung angesammelt hatte, in vergleichsweise kurzen Zeitabständen entfernt werden kann. Eine stets gut gereinigte Filtereinrichtung bietet aber den Vorteil, daß eine große Saugleistung im Verhältnis zum eingesetzten Energieaufwand zur Verfügung steht.When cleaning textile machines, suction units equipped with two blowers have become known, which have various advantages with regard to the flexibility of the available suction or blowing power. For example, it has become known to provide two fans of the same type with separate suction circuits and separate filter devices, which can be switched on alternately. This solution offers the advantage that it is possible to work with continuous cleaning power if the appropriate blower is alternately switched on and the other blower is either switched off or is operated in the cleaning operation immediately after the associated suction cycle has ended, so that the fiber fly that occurs had accumulated in the associated filter device, can be removed at comparatively short intervals. A filter device that is always well cleaned, however, has the advantage that a high suction power is available in relation to the energy input.

Ferner ist es auch bereits vorgeschlagen worden, ein Gebläse mit hohem Differenzdruck und geringem Fördervolumen und ein weiteres Gebläse mit niedrigem Differenzdruck und großem Fördervolumen zu verwenden.Furthermore, it has also already been proposed to use a blower with a high differential pressure and low delivery volume and a further blower with a low differential pressure and large delivery volume.

Ein derartiges, gattungsgemäßes Saugaggregat bietet die Möglichkeit, gezielt an Stellen größerer Verschmutzung eine erhöhte Reinigungswirkung bereitzustellen und im übrigen mit dem Niederdruckgebläse Faserflugmengen großvolumig abzusaugen.Such a generic suction unit offers the possibility of providing an increased cleaning effect in a targeted manner at places of greater soiling and, moreover, of sucking up large quantities of fiber fly with the low-pressure blower.

Ein besonderes Problem tritt bei der Absaugung von zu fettenden Maschinenteilen, wie Streckwerkswalzen, auf. Der Faserflug neigt dazu, sich an den etwas überfetteten Stellen abzusetzen und dort recht stark zu haften. In diesen Bereichen ist hierdurch die Störanfälligkeit der Textilmaschine erheblich vergrößert, so daß es wünschenswert wäre, gerade die verschmutzungsgefährdeten Teile besonders gut zu reinigen.A particular problem arises in the extraction of machine parts to be greased, such as drafting rollers. The fiber fly tends to settle in the slightly over-greased areas and stick there quite strongly. This means that in these areas The susceptibility of the textile machine to failure is increased considerably, so that it would be desirable to clean the parts at risk of contamination particularly well.

Es ist auch bereits vorgeschlagen worden, den recht fettigen Faserflug mit Hilfe von Schiebern und mechanischen Mitteln abzustreifen. Hierdurch wird jedoch der fettige Faserflug noch komprimiert und haftet dann sogar noch stärker.It has also been proposed to strip off the rather greasy fiber fly with the help of sliders and mechanical means. This, however, compresses the greasy fiber fly and then adheres even more strongly.

Demgegenüber ist es Aufgabe der Erfindung, ein Saugaggregat gemäß dem Oberbegriff von Anspruch 1 zu schaffen, das für die Reinigung auch sehr unterschiedlich stark verunreinigter Stellen einer Textilmaschine geeignet ist, in einem schnellen Reinigungszyklus arbeiten kann und dessen Störanfälligkeit vermindert ist.In contrast, it is an object of the invention to provide a suction unit according to the preamble of claim 1, which is suitable for cleaning very differently contaminated areas of a textile machine, can work in a fast cleaning cycle and its susceptibility to malfunction is reduced.

Diese Aufgabe wird erfindungsgemäß durch Anspruch 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved by claim 1. Advantageous further developments result from the subclaims.

Ein besonders günstiger Effekt ergibt sich bei der Kombination der Streckwalzenabsaugung im Hochdruckbereich mit der Absaugung des sonstigen Faserflugs im Niederdruckbereich.A particularly favorable effect results from the combination of the drawing roller suction in the high pressure area with the suction of the other fiber fly in the low pressure area.

Der relativ fetthaltige Faserflug aus dem Streckwalzenbereich wird praktisch abwechselnd geschichtet mit dem fettlosen bzw. fettarmen Faserflug aus dem Niederdruckkreis im Auffangbehälter abgelegt. Hierbei hat es sich als überraschend besonders günstig herausgestellt, daß eine Vergleichmäßigung des Fettgehalts über die fettlosen und fetthaltigen Schichten im Auffangbehälter automatisch auftritt, so daß der Faserflug praktisch automatisch auf den gewünschten mittleren Fettgehalt eingestellt wird. Ganz leicht fettige Fasern neigen aber weniger dazu, sich so stark komprimieren zu lassen, daß sie an den Wänden und am Boden des Auffangbehälters festbacken.The relatively fat-containing fiber fly from the stretching roller area is deposited practically alternately in layers with the fat-free or low-fat fiber fly from the low-pressure circuit in the collecting container. It has been found to be surprisingly particularly favorable that the fat content is automatically equalized via the fat-free and fat-containing layers in the collecting container, so that the fiber fly is practically automatically adjusted to the desired average fat content. Very slightly greasy fibers tend less to compress so much that they stick to the walls and bottom of the collecting container.

Je nach Anteil der fetthaltigen Fasern läßt sich zudem eine Wiederverwendung des gesammelten Faserflugs ermöglichen.Depending on the proportion of fatty fibers, the collected fiber fly can also be reused.

Dadurch, daß man das mit zwei Gebläsen ausgestattete erfindungsgemäße Saugaggregat mit einem Hochdruckkreis und einem Niederdruckkreis ausstattet, die insbesondere nacheinander arbeiten können, ergibt sich zunächst der Vorteil, daß ohne zeitliche Verzögerung die Textilmaschinenreihe je mit der größtmöglichen Effizienz gereinigt werden kann. Dies bedeutet praktisch, daß Bereiche wie Streckwalzen oder Wirtelklappen mittels des Hochdruckkreises gereinigt werden können, während eine Bodenabsaugung kontinuierlich über den Niederdruckkreis möglich ist.By equipping the suction unit according to the invention equipped with two fans with a high-pressure circuit and a low-pressure circuit, which can work in particular one after the other, there is first the advantage that the textile machine series can be cleaned with the greatest possible efficiency without delay. This means in practice that areas such as stretching rollers or whirling flaps can be cleaned by means of the high pressure circuit, while floor suction is possible continuously via the low pressure circuit.

Besonders günstig ist es, eine Umschalteinrichtung wie eine Klappe vorzusehen, die sich im (normalen) Saugbetrieb für jeden Kreis in geschlossenem Zustand befindet, im Filter-Reinigungsbetrieb sich jedoch je automatisch öffnet. Hiermit wird die Entkopplung der Reinigung bereitgestellt, wobei es sich durch ein mechanisches Schaltglied, aber beispielsweise auch durch entsprechende Mikroschalter ohne weiteres vermeiden läßt, daß beide Kreise zugleich im Filter-Reinigungsbetrieb arbeiten.It is particularly favorable to provide a switching device such as a flap which is in the (normal) suction mode for each circuit in the closed state, but which opens automatically in the filter cleaning mode. The decoupling of the cleaning is hereby provided, wherein it can easily be avoided by means of a mechanical switching element, but for example also by means of corresponding microswitches, that both circuits work simultaneously in the filter cleaning mode.

Diese auf den ersten Blick nachteilige Eigenschaft des erfindungsgemäßen Saugaggregats stellt keinen wirklichen Nachteil dar. Vielmehr beträgt der Anteil des Filter-Reinigungsbetriebs am Saugbetrieb pro Kreis zeitlich weniger als 10%, so daß die zeitliche Entkopplung unproblematisch ist. Zum anderen läßt sich das Bereitstellen eines separaten Auffangbehälters vermeiden. Hierbei ist es besonders günstig, daß die vorhandenen Zentralabsaugungen, die nicht auf zwei Auffangbehälter ausgelegt sind, weiterverwendet werden können.This, at first glance, disadvantageous property of the suction unit according to the invention is not a real disadvantage. Rather, the portion of the filter cleaning operation in the suction operation per circuit is less than 10% in time, so that the time decoupling is unproblematic. On the other hand, the provision of a separate collecting container can be avoided. It is particularly advantageous here that the existing central suction systems, which are not designed for two collecting containers, can continue to be used.

Mit den in den Unteransprüchen angegebenen Ausgestaltungen läßt sich besonders speziellen Anforderungen Rechnung tragen. Wenn stark fetthaltiger Faserflug abgesaugt wird, ist es besonders günstig, daß mit den erfindungsgemäßen Klappen ein schlagartiger Umschaltbetrieb möglich ist. Wenn eine Klappe, beispielsweise eine Rückschlagklappe gemäß Anspruch 8, 9 oder 10, beispielsweise einseitig schwenkbeweglich aufgehängt ist und schlagartig in die andere Arbeitsstellung gebracht wird, entsteht eine Zentrifugalkraft, die etwaigen, aufgrund des Fettgehalts noch anhaftenden Faserflug abschleudert. Insbesondere die den Sauganschluß abdeckende Klappe arbeitet hierbei praktisch im Servobetrieb, so daß keine besondere mechanische Steuerung erforderlich ist. Bei der schlagartigen Umschaltung von Saugbetrieb auf Filter-Reinigungsbetrieb durch weitere, hier nicht im einzelnen erläuterte Klappen entsteht schlagartig an der Klappe anstelle des Unterdrucks ein Überdruck bzw. anstelle des Überdrucks ein Unterdruck, so daß sie schnell in die je andere Arbeitsstellung gebracht wird, wodurch die gewünschte Wirkung eintritt. Eine entsprechende Rückschlagklappe kann sowohl im Hochdruck- als auch im Niederdruckkreis vorgesehen sein.With the configurations specified in the subclaims, special requirements can be taken into account. If high-fat fiber fly is suctioned off, it is particularly favorable that a sudden changeover operation is possible with the flaps according to the invention. If a flap, for example a check valve according to claim 8, 9 or 10, for example, is suspended on one side so as to be pivotable and is suddenly brought into the other working position, a centrifugal force is generated which throws off any fiber fly still adhering due to the fat content. In particular, the flap covering the suction connection works practically in servo mode, so that no special mechanical control is required. In the case of the sudden changeover from suction operation to filter cleaning operation by means of further flaps, which are not explained in detail here, an overpressure or an underpressure instead of the underpressure arises suddenly on the flap, so that it is quickly brought into the other working position, whereby the desired effect occurs. A corresponding check valve can be provided both in the high-pressure and in the low-pressure circuit.

Bei einer Abwandlung gemäß Anspruch 11 ist es vorgesehen, einen stark fetthaltigen Faserflug einem separaten Hochdruckkreis zuzuführen, so daß praktisch zwei Hochdruckkreise und ein großvolumiger Niederdruckkreis besteht. Hierzu wird dann saugseitig des Hochdruckgebläses über einen gesteuerten Wechselschieber eine Umschaltung zwischen dem einem separaten Auffangbehälter zugeordneten Fett-Hochdruckkreis und dem normalen Hochdruckkreis vorgenommen.In a modification according to claim 11, it is provided to supply a high-fat fiber fly to a separate high-pressure circuit, so that there are practically two high-pressure circuits and a large-volume low-pressure circuit. For this purpose, on the suction side of the high-pressure blower, a switch is made between the grease high-pressure circuit assigned to a separate collecting container and the normal high-pressure circuit via a controlled change-over slide.

Diese Abwandlung bietet besondere Vorteile, wenn sowohl eine Wiederverwendung von sehr fetthaltigem Faserflug als auch von nicht-fettigem Faserflug möglich ist, wobei entsprechende Maßnahmen zur je separaten Wiederverwendung bzw. Regeneration vorausgesetzt sind.This modification offers particular advantages if both reuse of very fatty fiber fly and non-fatty fiber fly is possible, with corresponding measures for separate reuse or regeneration being required.

Weitere Einzelheiten, Vorteile und Merkmale sind aus der nachstehenden Beschreibung mehrerer Ausführungsbeispiele anhand der Zeichnung näher erläutert.Further details, advantages and features are explained in more detail from the following description of several exemplary embodiments with reference to the drawing.

Es zeigen:

Fig. 1
eine schematisierte Darstellung einer Ausführungsform eines erfindungsgemäßen Saugaggregats;
Fig. 2
eine schematisierte Darstellung einer abgewandelten Ausführungsform des Saugaggregats gemäß Fig. 1;
Fig. 3
eine schematisierte Darstellung einer dritten Ausführungsform des erfindungsgemäßen Saugaggregats; und
Fig. 4
eine Schnittdarstellung eines horizontalen Schnitts des Saugaggregats gemäß Fig. 3.
Show it:
Fig. 1
a schematic representation of an embodiment of a suction unit according to the invention;
Fig. 2
a schematic representation of a modified embodiment of the suction unit according to FIG. 1;
Fig. 3
a schematic representation of a third embodiment of the suction unit according to the invention; and
Fig. 4
3 shows a sectional illustration of a horizontal section of the suction unit according to FIG. 3.

Ein erfindungsgemäßes Saugaggregat 10 weist einen Hochdruckkreis 14 und einen Niederdruckkreis 12 auf. Jeder der Kreise ist mit einem Gebläse ausgestattet, die in Fig. 1 nicht dargestellt sind, wobei das Gebläse für den Hochdruckkreis 14 für eine große Druckdifferenz und ein vergleichsweise geringes Fördervolumen und das Gebläse für den Niederdruckkreis 12 für ein hohes Fördervolumen und eine vergleichsweise geringe Druckdifferenz ausgelegt ist.A suction unit 10 according to the invention has a high-pressure circuit 14 and a low-pressure circuit 12. Each of the circuits is equipped with a blower, which is not shown in FIG. 1, the blower for the high pressure circuit 14 for a large pressure difference and a comparatively low delivery volume and the blower for the low pressure circuit 12 for a high delivery volume and a comparatively low pressure difference is designed.

Der Niederdruckkreis 12 weist einen Saugkanal 16 auf, der sich von einem Sauganschluß 18 über einen Saugraum 20 durch eine Filtereinrichtung 22 zu einem Gebläseanschluß 24 erstreckt, an welchen das Niederdruckgebläse mit seiner Saugseite angeschlossen ist. Die Filtereinrichtung 22 ist hierbei in einen Filterhalterahmen 26 eingehängt und wird von unten nach oben durchströmt. Sie ist im oberen Bereich des Saugraums 20 angeordnet, der ebenso wie die Filtereinrichtung 22 einen vergleichsweise großen Strömungsquerschnitt aufweist. Hierdurch ist in an sich bekannter Weise die Strömungsgeschwindigkeit des Saugluftstroms stark vermindert, beispielsweise auf ein Zehntel der Strömungsgeschwindigkeit in dem Sauganschluß 18.The low-pressure circuit 12 has a suction channel 16, which extends from a suction connection 18 via a suction chamber 20 through a filter device 22 to a blower connection 24, to which the low-pressure blower is connected with its suction side. The filter device 22 is here suspended in a filter holding frame 26 and flows through from bottom to top. It is arranged in the upper region of the suction space 20, which, like the filter device 22, has a comparatively large flow cross section. As a result, the flow velocity of the suction air flow is greatly reduced in a manner known per se, for example to one tenth of the flow velocity in the suction connection 18.

Die Filtereinrichtung 22, die sich im wesentlichen horizontal erstreckt, ist an ihrer Saugseite 28 vergleichsweise glatt, so daß sich ansammelnder Faserflug im Reinigungsbetrieb leicht lösbar ist. Der Sauganschluß 18 weist eine Achse 30 auf, die sich im wesentlichen horizontal erstreckt und deutlich unterhalb der Filtereinrichtung 22 verläuft. Zwischen dem Sauganschluß 18 und dem Saugraum 20 ist eine Rückschlagklappe 32 vorgesehen, die an einem Schwenklager 34 knapp oberhalb des Sauganschlusses schwenkbeweglich gelagert ist. Die mögliche Schwenkbewegung der Rückschlagklappe 32 wird einerseits durch den Sauganschluß 18 und andererseits durch eine Prallfläche 36 begrenzt, so daß sich die Rückschlagklappe 32 von der senkrechten Stellung, in welcher der Sauganschluß 18 im wesentlichen nicht verschlossen ist, bis zu einer schrägen Stellung von etwas mehr als 45° erstrecken kann. Die Prallfläche 36 ist vergleichsweise stabil, so daß sie einen harten Anschlag für die Rückschlagklappe 32 bildet.The filter device 22, which extends essentially horizontally, is comparatively smooth on its suction side 28, so that accumulating fiber fly is easy in the cleaning operation is solvable. The suction connection 18 has an axis 30 which extends essentially horizontally and runs clearly below the filter device 22. A non-return flap 32 is provided between the suction connection 18 and the suction space 20 and is pivotally mounted on a swivel bearing 34 just above the suction connection. The possible pivoting movement of the check valve 32 is limited on the one hand by the suction connection 18 and on the other hand by an impact surface 36, so that the check valve 32 extends from the vertical position, in which the suction connection 18 is essentially not closed, to an oblique position of somewhat more can extend as 45 °. The baffle 36 is comparatively stable, so that it forms a hard stop for the check valve 32.

Der aus dem Sauganschluß 18 austretende Saugluftstrom, der mit Faserflug angereichert ist, wird durch die Prallfläche 36 und die eine Verlängerung der Prallfläche 36 nach schräg unten bildende Rückschlagklappe 32 nach schräg/unten abgelenkt, so daß sie zu dem gegenüberliegenden Bereich des Saugraums gelangt. Aufgrund des großen Durchmessers des Saugraums 20 erfolgt eine Strömungsberuhigung und -vergleichmäßigung, so daß sich ein großer Teil des mitgeführten Faserflugs am Boden des Saugraums 20 absetzt.The suction air stream emerging from the suction connection 18, which is enriched with fiber fly, is deflected obliquely / downwards by the baffle surface 36 and the non-return flap 32 which forms an extension of the baffle surface 36 so that it reaches the opposite area of the suction chamber. Due to the large diameter of the suction space 20, the flow is calmed and evened out, so that a large part of the fiber flight carried settles on the bottom of the suction space 20.

Der Boden des Saugraums 20 ist seinerseits von einer Reinigungsklappe 38 gebildet, die an einem weiteren Schwenklager 40 gelagert ist und sich von der horizontalen Stellung, in welcher sie einen Boden des im wesentlichen dichten Saugraums 20 bildet, in eine nahezu vertikale Stellung verschwenkbar ist, in welcher der Reinigungsbetrieb möglich ist.The bottom of the suction space 20 is in turn formed by a cleaning flap 38 which is mounted on a further pivot bearing 40 and can be pivoted from the horizontal position in which it forms a bottom of the substantially sealed suction space 20 into an almost vertical position which cleaning operation is possible.

Im Saugbetrieb ist die Reinigungsklappe 38 geschlossen, d.h., in der horizontalen Stellung, in welcher sie einen Boden für den Saugraum 20 bildet.In the suction mode, the cleaning flap 38 is closed, i.e. in the horizontal position in which it forms a floor for the suction space 20.

Zur Kompensation ihres Gewichts ist sie im Bereich des Schwenklagers 40 mit einer nicht dargestellten Spiralfeder vorbelastet, die so dimensioniert ist, daß die Reinigungsklappe 38 bei abgeschaltetem Gebläse durch die Wirkung dieser Spiralfeder zumindest knapp unterhalb der Horizontalstellung gehalten wird.To compensate for its weight, it is preloaded in the area of the pivot bearing 40 with a spiral spring, not shown, which is dimensioned such that the cleaning flap 38 is held at least just below the horizontal position by the action of this spiral spring when the fan is switched off.

Bei Einschaltung des Gebläses für den Niederdruckkreis 12 wird die Reinigungsklappe 38 in die vollständig horizontale Lage gezogen, sofern sie nicht bereits den Saugraum 20 nach unten abdichtet.When the fan for the low-pressure circuit 12 is switched on, the cleaning flap 38 is pulled into the completely horizontal position, provided that it does not already seal the suction space 20 downwards.

Im Saugbetrieb des Niederdruckkreises 12 wird ferner durch die Wirkung des Niederdruckgebläses die Rückschlagklappe 32 in die Schrägstellung gezogen, in welcher sie an der Prallfläche 36 anliegt. Eine Mittelstellung zwischen dieser Stellung und der geschlossenen Stellung (Reinigungsbetrieb) der Rückschlagklappe 32 ist in Fig. 1 gestrichelt angedeutet.In suction operation of the low-pressure circuit 12, the check valve 32 is also pulled into the inclined position by the action of the low-pressure blower, in which it rests on the baffle surface 36. A middle position between this position and the closed position (cleaning operation) of the check valve 32 is indicated by dashed lines in FIG. 1.

Durch fortgesetzten Saugbetrieb sammelt sich unten an der Filtereinrichtung 22 ein nicht dargestellter Filterkuchen an, der den Saugwiderstand vergrößert und die Strömungsgeschwindigkeit des Niederdruckkreises verringert. Sobald dies festgestellt wird, wird auf Filter-Reinigungsbetrieb umgeschaltet. Hierzu wird durch nicht dargestellte Klappen der Saugluftstrom aus dem Gebläseanschluß 24 heraus abgebrochen und ein Blasluftstrom über einen gestrichelt dargestellten Reinigungsanschluß 42 geleitet, der oberhalb der Filtereinrichtung 22 in den Saugraum 20 mündet. Durch den Blasluftstrom wird in dem Saugraum 20 ein Überdruck erzeugt, der dazu führt, daß sich die Rückschlagklappe 32 und die Reinigungsklappe 38 je in die andere Stellung bewegen: die Rückschlagklappe 32 wird in die den Sauganschluß 18 abdichtende Stellung geschleudert und die Reinigungsklappe 38 in die nahezu vertikale Stellung. Durch den Blasluftstrom wird der sich unten an der Filtereinrichtung 22 befindende und dort zunächst anhaftende Filterkuchen abgelöst und gelangt in einen Auffangbehälter 44, der sich unterhalb des Saugraums befindet. Der Durchmesser des Auffangbehälters 44 entspricht in etwa dem des Saugraums, so daß dort eine geringe Strömungsgeschwindigkeit herrscht und der Filterkuchen sich dort endgültig absetzt.Through continued suction operation, a filter cake (not shown) accumulates at the bottom of the filter device 22, which increases the suction resistance and reduces the flow speed of the low-pressure circuit. As soon as this is ascertained, the system switches over to filter cleaning operation. For this purpose, the suction air flow from the blower connection 24 is interrupted by flaps (not shown) and a blown air flow is passed via a cleaning connection 42 shown in broken lines, which opens into the suction space 20 above the filter device 22. The blown air flow creates an overpressure in the suction chamber 20, which leads to the non-return flap 32 and the cleaning flap 38 each moving into the other position: the non-return flap 32 is thrown into the position sealing the suction port 18 and the cleaning flap 38 into that almost vertical position. The blown air stream removes the filter cake located at the bottom of the filter device 22 and initially adheres there and reaches a collecting container 44 which is located below the suction space. The diameter of the collecting container 44 corresponds approximately to that of the suction chamber, so that there is a low flow velocity and the filter cake finally settles there.

Der Hochdruckkreis 14 ist mit entsprechenden Elementen versehen, so daß auch dort ein Saugbetrieb und ein Filter-Reinigungsbetrieb möglich ist. Die einzelnen Konstruktionselemente des Hochdruckkreises 14 sind den Konstruktionselementen des Niederdruckkreises 12 entsprechend bezeichnet, wobei zur Unterscheidung das jeweilige Bezugszeichen um 100 erhöht ist. Dem Saugkanal 16 des Niederdruckkreises entspricht also ein Saugkanal 116 des Hochdruckkreises usw. Beiden Kreisen ist der Auffangbehälter 44 gemeinsam. Der Saugbetrieb kann für den Hochdruckkreis 14 und für den Niederdruckkreis 12 voneinander entkoppelt durchgeführt werden. Jedoch ist gleichzeitiger Filter-Reinigungsbetrieb des Hochdruckkreises 14 und des Niederdruckkreises 12 tunlichst zu vermeiden. Ferner sind die Kreise 12 und 14 über ein gemeinsames Gehäuse 46 zusammengefaßt, das nach unten hin, d.h. zum Auffangbehälter 44 hin, verjüngt ist. Hierdurch ist für den Filter-Reinigungsbetrieb des Hochdruckkreises 14 ein etwas verlängerter Reinigungskanal 148 vorgesehen, der einen im wesentlichen dem Saugraum 120 entsprechenden Durchmesser aufweist und in den Auffangbehälter 44 mündet. Der Strömungsdurchmesser des Auffangbehälters 44 ist erheblich größer als der Durchmesser des Reinigungskanals 148.The high-pressure circuit 14 is provided with corresponding elements, so that suction operation and filter cleaning operation are also possible there. The individual construction elements of the high-pressure circuit 14 are designated accordingly to the construction elements of the low-pressure circuit 12, the respective reference number being increased by 100 to distinguish them. The suction channel 16 of the low-pressure circuit thus corresponds to a suction channel 116 of the high-pressure circuit, etc. The collecting container 44 is common to both circles. The suction operation can be carried out decoupled from one another for the high pressure circuit 14 and for the low pressure circuit 12. However, simultaneous filter cleaning operation of the high pressure circuit 14 and the low pressure circuit 12 should be avoided as far as possible. Furthermore, the circles 12 and 14 are combined via a common housing 46 which extends downwards, i.e. towards the collecting container 44, is tapered. As a result, a somewhat lengthened cleaning channel 148 is provided for the filter cleaning operation of the high pressure circuit 14, which has a diameter essentially corresponding to the suction chamber 120 and opens into the collecting container 44. The flow diameter of the collecting container 44 is considerably larger than the diameter of the cleaning channel 148.

In Fig. 2 ist eine weitere Ausführungsform mit einer doppelt wirkenden Ventilklappe dargestellt.2 shows a further embodiment with a double-acting valve flap.

Wie aus Fig. 2 ersichtlich ist, erstreckt sich oberhalb des Gebläseanschlusses 24 das Niederdruckgebläse 50 und oberhalb des Gebläseanschlusses 124 das Hochdruckgebläse 150.As can be seen from FIG. 2, the low-pressure blower 50 extends above the blower connection 24 and the high-pressure blower 150 extends above the blower connection 124.

Aus Fig. 3 ist eine dritte Ausführungsform ersichtlich, die sich von der in den Fig. 1 und 2 dargestellten Ausführungsform durch die spezielle Ausgestaltung des Hochdruckkreises 14 unterscheidet. Der Hochdruckkreis 14 ist praktisch in zwei Hochdruckkreise 14A und 14B aufgeteilt, wobei der Hochdruckkreis 14A dem Hochdruckkreis 14 gemäß Fig. 1 entspricht. Der Hochdruckkreis 14B weist dem Hochdruckkreis 14A entsprechende Teile auf, deren Bezugszeichen der Einfachheit halber gegenüber den Bezugszeichen des Hochdruckkreises 14A (bzw. 14 in Fig. 1 und 2) je wiederum um 100 erhöht ist.3 shows a third embodiment, which differs from the embodiment shown in FIGS. 1 and 2 by the special design of the high pressure circuit 14. The high pressure circuit 14 is practically divided into two high pressure circuits 14A and 14B, the high pressure circuit 14A being the high pressure circuit 14 corresponds to FIG. 1. The high-pressure circuit 14B has parts corresponding to the high-pressure circuit 14A, the reference symbols of which, for the sake of simplicity, are each increased by 100 compared to the reference symbols of the high-pressure circuit 14A (or 14 in FIGS. 1 and 2).

Zusätzlich ist ein Schieber 52 vorgesehen, der sich zwischen den Filtereinrichtungen 222 und 122 und dem Hochdruckgebläse 150 erstreckt und wahlweise einen der beiden Hochdruckkreise 14A und 14B einschaltet.In addition, a slide 52 is provided which extends between the filter devices 222 and 122 and the high pressure blower 150 and optionally switches on one of the two high pressure circuits 14A and 14B.

Der Hochdruckkreis 14B ist mit einem Auffangbehälter 54 ausgerüstet, der für das Aufnehmen von besonders verunreinigtem Faserflug dient.The high-pressure circuit 14B is equipped with a collecting container 54, which is used to hold particularly contaminated fiber fly.

In der Ausführungsform gemäß Fig. 3 ist der Auffangbehälter 44 für die Wiederverwendung des dort angesammelten Faserflugs vorgesehen, während der in dem Auffangbehälter 54 gesammelte Faserflug separat zu entsorgen ist.In the embodiment according to FIG. 3, the collecting container 44 is provided for the reuse of the fiber fly collected there, while the fiber fly collected in the collecting container 54 is to be disposed of separately.

Aus Fig. 4 ist ersichtlich, daß die Abmessungen der beiden Hochdruckkreise 14A und 14B zusammen in etwa dem Saugraum 20 des Niederdruckkreises 12 entsprechen.From Fig. 4 it can be seen that the dimensions of the two high pressure circuits 14A and 14B together correspond approximately to the suction chamber 20 of the low pressure circuit 12.

Die Sauganschlüsse 118 und 218 sind je an geeigneten Stellen unterhalb der Filtereinrichtungen 122 und 222 vorgesehen, wobei der Sauganschluß 222 mit einem Saugmundstück für fettigen Faserflug in Verbindung steht.The suction connections 118 and 218 are each provided at suitable locations below the filter devices 122 and 222, the suction connection 222 being connected to a suction mouthpiece for greasy fiber fly.

Gemäß einer abgewandelten Ausführungsform ist es vorgesehen, den Schieber 52 mit einer Umschalteinrichtung dergestalt zu koppeln, daß der jeweils abgeschaltete Hochdruckkreis 14A bzw. 14B in den Reinigungsbetrieb versetzt wird. Hierzu wird von dem Niederdruckkreis 12 über eine entsprechende Umschalteinrichtung etwas Luft abgezweigt, so daß die Filtereinrichtungen 122 bzw. 222 ziemlich intensiv gereinigt werden können.According to a modified embodiment, it is provided that the slide 52 is coupled to a switching device in such a way that the high-pressure circuit 14A or 14B which is in each case switched off is put into cleaning operation. For this purpose, some air is branched off from the low-pressure circuit 12 via a corresponding switching device, so that the filter devices 122 and 222 can be cleaned quite intensively.

Claims (11)

  1. Suction unit equipped with two blowers for cleaning textile machines, the suction connections of which being each connected to a filter means (22, 122), a blower (150) operating with a high differential pressure and little volumetric displacement and a further blower (50) operating with low differential pressure and high volumetric displacement and the filter means (21, 121) being dischargeable for cleaning by reversing the airflow, characterized in that the filter means (22, 122) are allocated to a collecting container (44) in which the filter cakes of the different filter means (22, 122) can be collected selectively.
  2. Suction unit according to claim 1, characterized in that the high-pressure blower is connected to at least one suction nozzle, which is used for cleaning the wharve flaps, for cleaning the balloon or the like, and is particularly connected to such a suction nozzle by means of which a fly of fibres containing grease can be evacuated in the area of the drafting equipment.
  3. Suction unit according to one of the preceding claims, characterized in that a reversing means for the filter means (22, 122) is provided, by means of which either the fly of fibres from the high-pressure blower or from the low-pressure blower can selectively be collected in a collecting container (44).
  4. Suction unit according to one of the preceding claims, characterized in that a reversing means for a high-pressure circuit (14) and a low-pressure circuit (12) can be controlled such that the collecting container (44) can be discharged before activating the reverse means.
  5. Suction unit according to one of the preceding claims, characterized in that a reversing means is provided by means of which a filter cleaning airflow from the cleaning terminal (42, 142) can be guided in particular abruptly through one of the filter means (22, 122, 222).
  6. Suction unit according to one of the preceding claims, characterized in that the high-pressure blower (150) is connected in its suction channel to two filter means (122, 222) which are connected in parallel to each other, one of these filter means (222) being connected to suction nozzles for evacuating fibres containing much grease and the other filter means (122) being connected to suction nozzles for evacuating high-quality fibres.
  7. Suction unit according to one of the preceding claims, characterized in that the filter means (22, 122, 222) are suspended above a high-volume suction space (20, 120, 220), each having laterally a suction terminal (18, 118, 218), being covered by an inclined rebounding surface (36, 136).
  8. Suction unit according to one of the preceding claims, characterized in that a suction terminal (18, 118, 218) for the suction space (20, 120, 220) can each be shut underneath a filter means (22, 122, 222) by means of a one-way flap (32, 132, 232).
  9. Suction unit according to one of the preceding claims, characterized in that a one-way flap (32, 132) for the suction airflow is suspended rotably above a suction terminal (18, 118, 218) of a suction space (20, 120, 220) and that a rebounding surface (36, 136) located above it forms a limit stop for the one-way flap (32, 132).
  10. Suction unit according to one of the preceding claims, characterized in that one-way flaps (32, 132) of the suction terminals (18, 118, 218) can be shut abruptly for throwing off greasy remainders of fiber fly.
  11. Suction unit according to one of the preceding claims, characterized in that additionally a further filter means (222) is provided for separating off impurities which are not to get into the collecting container (44), a separate collecting container (24), in which the filter cake can be collected, being allocated to the filter means (222).
EP90118219A 1989-09-21 1990-09-21 Suction device Expired - Lifetime EP0418929B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8911278U DE8911278U1 (en) 1989-09-21 1989-09-21 Suction unit
DE8911278U 1989-09-21

Publications (3)

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EP0418929A2 EP0418929A2 (en) 1991-03-27
EP0418929A3 EP0418929A3 (en) 1991-07-17
EP0418929B1 true EP0418929B1 (en) 1994-12-28

Family

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Application Number Title Priority Date Filing Date
EP90118219A Expired - Lifetime EP0418929B1 (en) 1989-09-21 1990-09-21 Suction device

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EP (1) EP0418929B1 (en)
AT (1) ATE116385T1 (en)
DE (2) DE8911278U1 (en)
ES (1) ES2065454T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5720075A (en) * 1995-07-14 1998-02-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Manual suction device for textile machine cleaning

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1077157C (en) * 1995-04-07 2002-01-02 里特机械公司 Intermediate storage device
DE19528064A1 (en) * 1995-07-14 1997-01-16 Rieter Ingolstadt Spinnerei Manual suction device for machine cleaning

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412545A (en) * 1967-05-22 1968-11-26 Luwa Ltd Pneumatic cleaner for roving frames and the like
DE2419188C2 (en) * 1974-04-20 1984-07-05 Ltg Lufttechnische Gmbh, 7000 Stuttgart Cleaning device for a wing spinning machine
JPS61194229A (en) * 1985-02-20 1986-08-28 Nippon Spindle Mfg Co Ltd Filter box of pneumatic clearer for spinning machine
DE3527656A1 (en) * 1985-08-01 1987-02-12 Zinser Textilmaschinen Gmbh FILTER BOX FOR FILTERING FIBERS, FLIGHT AND OTHER IMPURITIES FROM A TEXTILE MACHINE, ESPECIALLY SPINNING MACHINE, EXHAUSTED AIR
JPS6350537A (en) * 1986-08-13 1988-03-03 Toyota Autom Loom Works Ltd Cleaning of suction port of blower for cleaning spinning frame

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5720075A (en) * 1995-07-14 1998-02-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Manual suction device for textile machine cleaning

Also Published As

Publication number Publication date
DE59008124D1 (en) 1995-02-09
DE8911278U1 (en) 1989-11-23
ATE116385T1 (en) 1995-01-15
EP0418929A2 (en) 1991-03-27
EP0418929A3 (en) 1991-07-17
ES2065454T3 (en) 1995-02-16

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