EP0175056A1 - Apparatus for the pneumatic transport of fibre flocks - Google Patents

Apparatus for the pneumatic transport of fibre flocks Download PDF

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Publication number
EP0175056A1
EP0175056A1 EP85106725A EP85106725A EP0175056A1 EP 0175056 A1 EP0175056 A1 EP 0175056A1 EP 85106725 A EP85106725 A EP 85106725A EP 85106725 A EP85106725 A EP 85106725A EP 0175056 A1 EP0175056 A1 EP 0175056A1
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EP
European Patent Office
Prior art keywords
channel
control
shafts
shaft
control elements
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.)
Granted
Application number
EP85106725A
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German (de)
French (fr)
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EP0175056B1 (en
Inventor
Paul Stäheli
Urs Stähli
Fritz Knabenhans
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Priority to AT85106725T priority Critical patent/ATE32918T1/en
Publication of EP0175056A1 publication Critical patent/EP0175056A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/08—Air draught or like pneumatic arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87249—Multiple inlet with multiple outlet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87788—With valve or movable deflector at junction
    • Y10T137/87812—Pivoted valve or deflector

Definitions

  • the present invention relates to a pneumatic transport system for fiber flakes according to the preamble of claim 1.
  • German Offenlegungsschrift No. 1 685 613 shows a feeding device with a transport channel, the channel sections located between filling chutes continuously expanding from one chute to the next. This serves to slow down the transport air on the inlet side of the shafts and to accelerate it on the outlet side.
  • insert plates are provided at the inlet and outlet openings of the feed shafts, which are arranged perpendicular to the direction of flow of the transport air. Such an inserting of plates, which is necessary for changing the flow rate, is impractical in terms of handling.
  • the position of the plates perpendicular to the flow direction causes a strong swirling of the air and thus an increase in the drive energy required to generate the transport flow.
  • Swiss patent specification No. 370 680 shows an air duct in which, at the location of the filling shafts, deflection flaps are provided on the rear side (with respect to the direction of the air flow). These flaps are used to redirect the fiber flakes into the corresponding filling shaft. The air acceleration caused by these flaps only occurs on the rear side of the filling shafts and thus only after the fiber flakes have essentially already passed the shaft opening.
  • Claim 2 relates to a particularly advantageous embodiment of the invention.
  • fiber material of two different types is fed to a group of cards.
  • the number of cards in the group fed with fiber material of one type and the number of cards in the group fed with fiber material of the other type can be selected and varied as desired by adjusting the control members.
  • This embodiment thus enables increased flexibility of a system with regard to the fiber material allocation to its cards or shafts.
  • FIGS. 1 and 2 shows an elongated channel 1 of a constant, rectangular cross section, which is higher than it is wide. Through this, fiber flakes are transported in the direction of arrow 2 by means of a transport medium, for example air, which is moved by a blower 3 (only shown in FIG. 1).
  • a transport medium for example air
  • a blower 3 only shown in FIG. 1
  • Each shaft has at its lower end e.g. Feed rollers, by means of which the fiber material is fed to a carding machine. The feed rollers and cards are not shown in the figures.
  • further shafts can be provided above each shaft 4 to 9, the bottom surface of the channel 1 has an opening 11 adapted to the corresponding shaft.
  • Each of the filling chutes 4 to 9 has a rectangular cross section, the long sides of which are transverse to the longitudinal direction of the cards and are parallel to the plane of the drawing and thus parallel to channel 1. There is therefore a so-called cross-feed.
  • Each control element 12 comprises a control plate 13, which is pivotably attached to a pivot axis 14 arranged perpendicular to the longitudinal direction of the channel 1 and within the channel 1 in any pivot positions is adjustable and fixable in these.
  • Each of the two control elements 12, which are located between adjacent shafts 4 to 9, is assigned to a shaft.
  • the control element on the left in the figures and thus also its control plate 13 is assigned to the shaft 6 and the control element 12 on the right in the figures or its control plate 13 is assigned to the shaft 7.
  • Each control plate 13 extends from its pivot axis 14 towards the shaft 4 to 9, to which it is assigned.
  • the pivot axes 14 are located on the bottom surface of the channel 1.
  • a locking wall 15 is attached to the end of each control plate 13 facing away from the axis 14. This extends downwards from this end into the assigned shaft 4 to 9.
  • the locking walls 15 extend downward by such an amount that they remain immersed in their assigned shafts 4 to 9 in all swivel positions of the control plates 13. So that there is little clearance when the control plates 13 are pivoted about their axes 14 between the locking walls 15 and the upper transverse edges 16 of the shafts 4 to 9, these walls 15 are advantageously curved, with their pivot axes 14 as centers of curvature, and are also the upper parts the filling shafts 4 to 9 adapted to the shape of the barrier walls, as shown in the drawing. This prevents fiber material from getting behind the barrier walls 15 and under the control plates 3.
  • the transport system shown has the advantage that it is easily possible to reverse the direction of the flock transport in the transport channel 1.
  • the duct 1 is closed at the point at which the blower 3 is located or is connected to a return line and a blower 17 shown in broken lines is provided at the other end. This moves the transport medium in the direction of the dashed arrow 18.
  • the plates 13 previously used for regulation are placed in their horizontal position and those control plates 13 which extend from their pivot axis 14 in the direction of flow of the medium according to arrow 18 are used.
  • the statements made above regarding the regulation of the speed of the transport medium apply analogously.
  • the provision of the control elements 12 according to the invention thus enables regulation of the fiber flakes to be deposited, i.e. regulation of the amount of flakes in each shaft regardless of the direction in which the flakes are transported in channel 1.
  • the use of the transport system is thus more versatile. No changes need to be made to channel 1 or shafts 4 to 9. Only the control members 12 have to be set according to the conditions.
  • control members 12 are designed in such a way that they can additionally be optionally set in a closed position in which the channel 1 is blocked for the transport medium.
  • a closed position is obtained by bringing the edge of a control member 12 formed by the control plate 13 and the barrier wall 15 into contact with the top surface 19 of the channel 1. This is the case in FIG. 2 for the control members 12 located between the shafts 6 and 7.
  • the embodiment according to claim 2 thus allows the number of cards in a group to which fiber material of one type and the number of cards in this group to which fiber material of another type is to be chosen as desired. To carry out, only the control members 12 have to be set accordingly, which means an extremely simple process.
  • the bottom 20 of the channel 1 below the control elements 12 can be omitted entirely.
  • the pivot axes 14 are formed by waves carried by both side walls of the channel.
  • the channel 1 used had a width of 17 cm and a height of 40 cm. In one case, the total amount of transport air supplied was 0.44 m3 / s (cubic meters per second). There were 6 shafts and they were supplied by means of a transport medium flowing in the shaft in only one direction. The positions of the control elements 12 shown in FIG. 1 do not correspond to those in the examinations.
  • the speed of the transport fluid i.e. the transport air should be greater than 2 m / s (meters per second) and less than 10 m / s, preferably greater than 3 m / s and less than 8 m / s. If the air speed is too low, the flakes start to roll with difficulty and if the air speed is too high they fly over the shafts.
  • the system according to the invention with a total of 6 loaded shafts, up to three shafts can be temporarily parked.
  • the conditions begin to become unfavorable because the air speed becomes too high at the first, ie at the second to last shaft (shaft 8).
  • the system according to the invention has the advantage of allowing approximately half of them to be stopped at the same time without the occurrence of disadvantageous consequences, without the need for control organs to be readjusted.
  • the speeds of the transport air are still within the range between 2 m / s and 10 m / s. If the case arises that four of the six cards have to be shut down at the same time, this can be done by slightly reducing the amount of supply air. Such a reduction in the amount of feed air can e.g. by means of a regulation of the blower motor provided for this purpose or by changing a gear ratio in the transmission provided for this purpose.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

An arrangement for pneumatically transporting fiber material flocks through respective chutes to individual carding machines includes a duct which bounds an internal passage that communicates with the chutes, the chutes extending downwardly from the duct. A plurality of control elements is arranged in the passage, respective two of such control elements being situated between each adjacent two of the chutes. Each of the control elements has a substantially plate-shaped control member which is pivotally mounted at the bottom region of the duct, and a block member that extends substantially at a right angle to the control member remotely from the pivot axis and extends toward and into the respective chute. The control element can be pivoted into and arrested in any selected pivoted position, including a closed position in which the block member thereof substantially completely prevents the flow of the transporting medium past the same. The transporting medium carrying the flocks is introduced into either one or into both of the ends of the passage, and the positions of the control elements are so adjusted as to obtain flow speeds upstream of the respective chutes in the range substantially between 2 and 10 m/s; the transporting medium volume can also be adjusted toward this goal. Those of the control elements which are situated between two adjacent chutes may be mounted on a common pivot axle.

Description

Die vorliegende Erfindung bezieht sich auf eine pneumatische Transportanlage für Faserflocken nach dem Oberbegriff des Pantentanspruchs 1.The present invention relates to a pneumatic transport system for fiber flakes according to the preamble of claim 1.

Eine solche Anlage ist in der deutschen Offenlegungsschrift Nr. 1 510 413 gezeigt. Gemäss dieser befindet sich am oberen Ende jedes Füllschachtes eine Entnahmewalze, welche Flocken erfasst und in den Schacht hineinbefördert. Die gezeigte Ablenkplatte dient dazu, die Flocken über die Entnahmewalze in den Fällen wegzulenken, in denen ansonst zu viele Flocken in den Schacht gelangen würden. Bei der gezeigten Ablenkplatte bilden sich an deren hinteren Ende und unter derselben starke Luftwirbel, wodurch sich zwischen der Ablenkplatte und der sich unter dieser befindlichen Bodenfläche des Kanals eine unerwünschte Ansammlung von Faserflocken ergeben kann. Die Einstellbarkeit der Ablenkplatte ist beschränkt. Zudem kann Flockenmaterial nur in einer Richtung durch den Transportschacht befördert werden. Auch kann kein Absperren des Kanals bewirkt werden.Such an installation is shown in German Offenlegungsschrift No. 1 510 413. According to this, there is a removal roller at the upper end of each filling shaft, which detects flakes and conveys them into the shaft. The baffle plate shown serves to deflect the flakes over the removal roller in cases where too many flakes would otherwise get into the shaft. In the baffle plate shown, strong air vortices form at its rear end and below it, which can result in an undesirable accumulation of fiber flakes between the baffle plate and the bottom surface of the channel located beneath it. The adjustability of the baffle is limited. In addition, flake material can only be conveyed through the transport shaft in one direction. The channel cannot be shut off either.

Die deutsche Offenlegungsschrift Nr. 1 685 613 zeigt eine Speiseeinrichtung mit einem Transportkanal, dessen sich zwischen Füllschächten befindliche Kanalabschnitte sich von einem Schacht zum nächsten stetig erweitern. Dies dient dazu, die Transportluft auf der Eingangsseite der Schächte zu verlangsamen und auf deren Ausgangsseite zu beschleunigen. Um eine Steuerung der Geschwindigkeit der Transportluft zu erreichen, sind an den Einlass- und Auslassöffnungen der Speiseschächte Einsatzplatten vorgesehen, welche senkrecht zur Strömungsrichtung der Transportluft angeordnet sind. Ein solches zum Verändern der Strömungsgeschwindigkeit notwendiges Einsetzen von Platten ist bezüglich der Handhabung unpraktisch. Ausserdem bedingt die zur Strömungsrichtung senkrechte Lage der Platten eine starke Durchwirbelung der Luft und damit eine Erhöhung der benötigten Antriebsenergie zum Erzeugen der Transportströmung.German Offenlegungsschrift No. 1 685 613 shows a feeding device with a transport channel, the channel sections located between filling chutes continuously expanding from one chute to the next. This serves to slow down the transport air on the inlet side of the shafts and to accelerate it on the outlet side. In order to control the speed of the transport air, insert plates are provided at the inlet and outlet openings of the feed shafts, which are arranged perpendicular to the direction of flow of the transport air. Such an inserting of plates, which is necessary for changing the flow rate, is impractical in terms of handling. In addition, the position of the plates perpendicular to the flow direction causes a strong swirling of the air and thus an increase in the drive energy required to generate the transport flow.

Die schweizerische Patentschrift Nr. 370 680 zeigt einen Luftkanal, in welchem am Orte der Füllschächte auf deren (in bezug auf die Richtung der Luftströmung) Hinterseite schwenkbare Ablenkklappen vorgesehen sind. Diese Klappen dienen dem Umlenken der Faserflocken in den entsprechenden Füllschacht hinein. Die durch diese Klappen bedingte Luftbeschleunigung tritt erst auf der hinteren Seite der Füllschächte und somit erst ein, nachdem die Faserflocken die Schachtöffnung im wesentlichen bereits passiert haben.Swiss patent specification No. 370 680 shows an air duct in which, at the location of the filling shafts, deflection flaps are provided on the rear side (with respect to the direction of the air flow). These flaps are used to redirect the fiber flakes into the corresponding filling shaft. The air acceleration caused by these flaps only occurs on the rear side of the filling shafts and thus only after the fiber flakes have essentially already passed the shaft opening.

Die obigen Nachteile werden durch die im kennzeichnenden Teil des Patentanspruchs 1 angegegebenen Merkmale vermieden. Durch diese ergeben sich zudem die Vorteile, dass bei relativ kleiner Luftmenge sechs und mehr Schächte durch einen einzigen Kanal gespiesen werden können. Die Steuerorgane verhindern im Bereich der hinteren Schächte ein Zusammenballen des Fasermaterials zu Klumpen. Schliesslich erhält man ein homogenes Auffüllen aller Schächte. Vor allem kann der Transport der Faserflocken im Transportkanal von einer Richtung in die entgegengesetzte gewechselt werden. Dadurch erhöhen sich die Verwendungsmöglichkeiten der Anlage.The above disadvantages are avoided by the features specified in the characterizing part of patent claim 1. These also result in the advantage le that with a relatively small amount of air six and more shafts can be fed through a single channel. The control elements prevent the fiber material from clumping together in the area of the rear shafts. Finally, you get a homogeneous filling of all shafts. Above all, the transport of the fiber flakes in the transport channel can be changed from one direction to the opposite. This increases the possible uses of the system.

Obwohl in der Beschreibung und in den Patentansprüchen nur Karden erwähnt sind, ist die Erfindung sowohl für Karden als auch für Krempeln in gleicher Weise verwendbar.Although only cards are mentioned in the description and in the claims, the invention can be used in the same way for cards as well as for carding.

Der Patentanspruch 2 betrifft eine besonders vorteilhafte Ausführungsform der Erfindung. Gemäss dieser wird Fasermaterial zweier verschiedener Arten einer Gruppe von Karden zugeführt. Dabei kann die Zahl der mit Fasermaterial der einen Art gespiesenen Karden der Gruppe und die Zahl der mit Fasermaterial der anderen Art gespiesenen Karden der Gruppe durch Einstellen der Steuerorgane beliebig gewählt und variiert werden. Diese Ausführungsform ermöglicht somit eine bezüglich der Fasermaterialzuteilung zu ihren Karden oder Schächten erhöhte Flexibilität einer Anlage.Claim 2 relates to a particularly advantageous embodiment of the invention. According to this, fiber material of two different types is fed to a group of cards. The number of cards in the group fed with fiber material of one type and the number of cards in the group fed with fiber material of the other type can be selected and varied as desired by adjusting the control members. This embodiment thus enables increased flexibility of a system with regard to the fiber material allocation to its cards or shafts.

Im folgenden sei die Erfindung anhand von Ausführungsbeispielen und der Figuren der Zeichnung näher erläutert. In dieser zeigt

  • Fig. 1 einen Längsschnitt eines Transportkanals und einen Längsschnitt von Füllschächten und
  • Fig. 2 einen Längsschnitt einer dem ersten Beispiel ähnlichen Anlage.
In the following, the invention will be explained in more detail using exemplary embodiments and the figures of the drawing. In this shows
  • Fig. 1 shows a longitudinal section of a transport channel and a longitudinal section of filling shafts and
  • Fig. 2 shows a longitudinal section of a plant similar to the first example.

Jede der Fig. 1 und 2 zeigt einen langgestreckten Kanal 1 von gleichbleibendem, rechteckigem Querschnitt, welcher höher als breit ist. Durch diesen werden in der Richtung des Pfeiles 2 mittels eines von einem (nur in Fig. 1 gezeigten) Gebläse 3 bewegten Transportmediums, beispielsweise Luft, Faserflocken transportiert. Unterhalb des Kanals 1 befinden sich Füllschächte 4, 5, 6, 7, 8 und 9. Jeder Schacht weist an seinem unteren Ende z.B. Speisewalzen auf, mittels derer das Fasermaterial einer Kardenmaschine zugeführt wird. Die Speisewalzen und Karden sind in den Figuren nicht gezeigt. Es können ausser den gezeigten Schächten 4 bis 9 noch weitere Schächte vorgesehen sein. Oberhalb jedes Schachtes 4 bis 9 weist die Bodenfläche des Kanals 1 eine dem entsprechenden Schacht angepasste Oeffnung 11 auf. Jeder der Füllschächte 4 bis 9 weist einen rechteckigen Querschnitt auf, dessen lange, quer zur Längsrichtung der Karden stehenden Seiten parallel zur Zeichenebene und damit parallel zum Kanal 1 liegen. Es liegt somit eine sogenannte Querspeisung vor.Each of FIGS. 1 and 2 shows an elongated channel 1 of a constant, rectangular cross section, which is higher than it is wide. Through this, fiber flakes are transported in the direction of arrow 2 by means of a transport medium, for example air, which is moved by a blower 3 (only shown in FIG. 1). Below the channel 1 there are filling shafts 4, 5, 6, 7, 8 and 9. Each shaft has at its lower end e.g. Feed rollers, by means of which the fiber material is fed to a carding machine. The feed rollers and cards are not shown in the figures. In addition to the shafts 4 to 9 shown, further shafts can be provided. Above each shaft 4 to 9, the bottom surface of the channel 1 has an opening 11 adapted to the corresponding shaft. Each of the filling chutes 4 to 9 has a rectangular cross section, the long sides of which are transverse to the longitudinal direction of the cards and are parallel to the plane of the drawing and thus parallel to channel 1. There is therefore a so-called cross-feed.

Zwischen je zwei benachbarten Füllschächten 4 bis 9 sind je zwei Steuerorgane 12 vorgesehen. Jedes Steuerorgan 12 umfasst eine Steuerplatte 13, welche an einer zur Längsrichtung des Kanals 1 senkrecht angeordneten Schwenkachse 14 schwenkbar befestigt und innerhalb des Kanals 1 in beliebige Schwenkstellungen einstellbar und in diesen fixierbar ist. Von den zwei Steuerorganen 12, welche sich zwischen benachbarten Schächten 4 bis 9 befinden, ist jedes einem Schacht zugeordnet. Zum Beispiel ist von den Steuerorganen 12 zwischen den Schächten 6 und 7, das in den Figuren linke Steuerorgan und damit auch seine Steuerplatte 13, dem Schacht 6 und das in den Figuren rechte Steuerorgan 12 bzw. seine Steuerplatte 13, dem Schacht 7 zugeordnet.Two control elements 12 are provided between each two adjacent filling shafts 4 to 9. Each control element 12 comprises a control plate 13, which is pivotably attached to a pivot axis 14 arranged perpendicular to the longitudinal direction of the channel 1 and within the channel 1 in any pivot positions is adjustable and fixable in these. Each of the two control elements 12, which are located between adjacent shafts 4 to 9, is assigned to a shaft. For example, of the control elements 12 between the shafts 6 and 7, the control element on the left in the figures and thus also its control plate 13 is assigned to the shaft 6 and the control element 12 on the right in the figures or its control plate 13 is assigned to the shaft 7.

Jede Steuerplatte 13 erstreckt sich von ihrer Schwenkachse 14 gegen den Schacht 4 bis 9 hin, dem sie zugeordnet ist. Die Schwenkachsen 14 befinden sich an der Bodenfläche des Kanals 1. In der Offenstellung eines Steuerorgans 12 bzw. einer Steuerplatte 13 befindet sich die letztere in ihrer horizontalen, am Boden des Kanals 1 aufliegenden Lage. In dieser Lage erfolgt der Durchfluss des Transportmediums durch den Kanal 1 praktisch unbeeinflusst.Each control plate 13 extends from its pivot axis 14 towards the shaft 4 to 9, to which it is assigned. The pivot axes 14 are located on the bottom surface of the channel 1. When a control member 12 or a control plate 13 is in the open position, the latter is in its horizontal position lying on the bottom of the channel 1. In this position, the flow of the transport medium through channel 1 is practically unaffected.

Am der Achse 14 abgewandten Ende jeder Steuerplatte 13 ist eine Sperrwand 15 angebracht. Diese erstreckt sich von diesem Ende nach unten in den zugeordneten Schacht 4 bis 9 hinein. Dabei erstrecken sich die Sperrwände 15 um einen solchen Betrag nach unten, dass sie in allen Schwenkstellungen der Steuerplatten 13 in ihren zugeordneten Schacht 4 bis 9 eingetaucht bleiben. Damit beim Schwenken der Steuerplatten 13 um ihre Achsen 14 zwischen den Sperrwänden 15 und den oberen Querkanten 16 der Schächte 4 bis 9 wenig Zwischenraum vorhanden ist, sind diese Wände 15 vorteilhafterweise, mit ihren Schwenkachsen 14 als Krümmungszentren, bogenförmig ausgebildet und sind auch die oberen Partien der Füllschächte 4 bis 9 der Form der Sperrwände angepasst, wie dies in der Zeichnung gezeigt ist. Damit wird verhindert, dass Fasermaterial hinter die Sperrwände 15 und unter die Steuerplatten 3 gelangen kann.A locking wall 15 is attached to the end of each control plate 13 facing away from the axis 14. This extends downwards from this end into the assigned shaft 4 to 9. The locking walls 15 extend downward by such an amount that they remain immersed in their assigned shafts 4 to 9 in all swivel positions of the control plates 13. So that there is little clearance when the control plates 13 are pivoted about their axes 14 between the locking walls 15 and the upper transverse edges 16 of the shafts 4 to 9, these walls 15 are advantageously curved, with their pivot axes 14 as centers of curvature, and are also the upper parts the filling shafts 4 to 9 adapted to the shape of the barrier walls, as shown in the drawing. This prevents fiber material from getting behind the barrier walls 15 and under the control plates 3.

Gemäss Fig. 1 hat jedes Steuerorgan 12 seine eigene Schwenkachse 14, während im Beispiel der Fig. 2 die sich zwischen je zwei benachbarten Füllschächten 4 bis 9 befindlichen Steuerplatten 13 an einer gemeinsamen Schwenkachse 14 schwenkbar befestigt sind.1, each control member 12 has its own pivot axis 14, while in the example of FIG. 2 the control plates 13 located between two adjacent filling shafts 4 to 9 are pivotably attached to a common pivot axis 14.

Im Betrieb der in Fig. 1 gezeigten Transportanlage werden Faserflocken mittels eines vom Gebläse 3 angetriebenen Transportfluidums in Richtung des Pfeiles 2 in den Kanal 1 eingeführt. Dabei ist vorausgesetzt, dass dieser am Ende des Schachtes 9 geschlossen ist oder in eine Rückleitung einmündet. Für das Füllen der Schächte ist es wichtig, dass jedem der Schächte 4 bis 9 die gleiche Menge Flockenmaterial zugeführt wird. Zur Regulierung der den Schächten 4 bis 9 zugeführten Mengen von Flocken dienen diejenigen Steuerplatten 13, die sich von den Schwenkachsen 14 in der Strömungsrichtung des Transportmediums (Pfeil 2) erstrecken. Je mehr eine Steuerplatte 13 aus ihrer horizontalen Lage nach oben weggeschwenkt wird, um so enger wird am Ort ihres sich von der Schwenkachse 14 abgewandten, hinteren Endes die Durchgangsöffnung für das Medium im Kanal 1 und um so grösser wird an dieser Stelle die Durchflussgeschwindigkeit des Mediums. Dadurch resultiert unmittelbar nach diesem hinteren Ende der Steuerplatten 13, d.h. am vorderen Teil der Schächte 4 bis 9, eine Vergrösserung des Durchflussquerschnittes und damit eine Verlangsamung der Strömungsgeschwindigkeit des Mediums. Als Folge davon fällt Flockenmaterial aus und gelangt in die Schächte 4 bis 9.In the operation of the transport system shown in FIG. 1, fiber flakes are introduced into the channel 1 in the direction of arrow 2 by means of a transport fluid driven by the blower 3. It is assumed that this is closed at the end of the shaft 9 or opens into a return line. For the filling of the shafts, it is important that each of the shafts 4 to 9 is fed the same amount of flake material. The control plates 13, which extend from the pivot axes 14 in the direction of flow of the transport medium (arrow 2), are used to regulate the quantities of flakes fed to the shafts 4 to 9. The more a control plate 13 is pivoted upwards out of its horizontal position, the narrower the passage opening for the medium in the channel 1 at the location of its rear end facing away from the pivot axis 14 and the greater the flow rate of the medium at this point . This results immediately after this rear end of the control plates 13, ie at the front part of the shafts 4 to 9, in an increase in the flow cross section and thus in a slowing of the flow speed of the medium. As a result, flake material precipitates and enters shafts 4 to 9.

Die gezeigte Transportanlage besitzt den Vorteil, dass es ohne weiteres möglich ist, die Richtung des Flockentransportes im Transportkanal 1 umzukehren. Zu diesem Zweck wird der Kanal 1 an der Stelle, an dem sich das Gebläse 3 befindet, abgeschlossen oder an eine Rückleitung angeschlossen und am anderen Ende ein strichliert gezeichnetes Gebläse 17 vorgesehen. Durch dieses wird das Transportmedium in Richtung des strichlierten Pfeiles 18 bewegt.The transport system shown has the advantage that it is easily possible to reverse the direction of the flock transport in the transport channel 1. For this purpose, the duct 1 is closed at the point at which the blower 3 is located or is connected to a return line and a blower 17 shown in broken lines is provided at the other end. This moves the transport medium in the direction of the dashed arrow 18.

Zur Regulierung der in die Schächte 4 bis 9 abzusetzenden Flockenmengen werden die vorher zur Regulierung benützten Platten 13 in ihre horizontale Lage versetzt und diejenigen Steuerplatten 13, welche sich von ihrer Schwenkachse 14 in der Strömungsrichtung des Mediums gemäss dem Pfeil 18 erstrecken, verwendet. Dabei gelten die im Vorhergehenden bereits gemachten Ausführungen bezüglich der Regulierung der Geschwindigkeit des Transportmediums in analoger Weise. Das Vorsehen der Steuerorgane 12 gemäss der Erfindung ermöglicht somit eine Regulierung der abzusetzenden Faserflocken, d.h. eine Regulierung der Flockenmenge jedes Schachtes unabhängig davon, in welcher Richtung der Transport der Flocken im Kanal 1 erfolgt. Die Verwendungsmöglichkeit der Transportanlage wird somit vielseitiger. Dabei müssen keine Aenderungen am Kanal 1 oder an den Schächten 4 bis 9 vorgenommen werden. Es müssen einzig die Steuerorgane 12 den Bedingungen entsprechend eingestellt werden.To regulate the amount of flakes to be deposited in the shafts 4 to 9, the plates 13 previously used for regulation are placed in their horizontal position and those control plates 13 which extend from their pivot axis 14 in the direction of flow of the medium according to arrow 18 are used. The statements made above regarding the regulation of the speed of the transport medium apply analogously. The provision of the control elements 12 according to the invention thus enables regulation of the fiber flakes to be deposited, i.e. regulation of the amount of flakes in each shaft regardless of the direction in which the flakes are transported in channel 1. The use of the transport system is thus more versatile. No changes need to be made to channel 1 or shafts 4 to 9. Only the control members 12 have to be set according to the conditions.

In der in Fig. 2 gezeigten Ausführungsform gemäss Patentanspruch 2 sind die Steuerorgane 12 in der Weise ausgebildet, dass sie zusätzlich wahlweise in eine Schliessstellung einstellbar sind, in welcher durch sie der Kanal 1 für das Transportmedium gesperrt ist. Eine solche Schliessstellung wird erhalten, indem die durch die Steuerplatte 13 und Sperrwand 15 gebildete Kante eines Steuerorgans 12 in Anlage mit der Deckfläche 19 des Kanals 1 gebracht wird. Dies ist in der Fig. 2 bei den sich zwischen den Schächten 6 und 7 befindlichen Steuerorganen 12 der Fall.In the embodiment shown in FIG. 2 according to claim 2, the control members 12 are designed in such a way that they can additionally be optionally set in a closed position in which the channel 1 is blocked for the transport medium. Such a closed position is obtained by bringing the edge of a control member 12 formed by the control plate 13 and the barrier wall 15 into contact with the top surface 19 of the channel 1. This is the case in FIG. 2 for the control members 12 located between the shafts 6 and 7.

Im Betrieb der in Fig. 2 gezeigten Transportanlage werden bei zwischen den Schächten 6 und 7 sich in Schliessstellung befindlichen Steuerorganen 12 die Schächte 4 bis 6 mit den in Richtung des Pfeiles 2 transportierten und die Schächte 7 bis 9 mit den in Richtung des Pfeiles 18 transportierten Faserflocken gespiesen. Die sich in bezug auf die Strömungsrichtungen der Pfeile 2 und 18 vor den Schächten 4 bis 6 und 7 bis 9 befindlichen Steuerplatten 13 werden in der Weise eingestellt, dass die Schächte mit der gewünschten Menge von Fasermaterial beschickt werden.In operation of the transport system shown in FIG. 2, when the control members 12 are in the closed position between the shafts 6 and 7, the shafts 4 to 6 are transported with those in the direction of arrow 2 and the shafts 7 to 9 are transported with those in the direction of arrow 18 Fiber flakes fed. The control plates 13 located in front of the shafts 4 to 6 and 7 to 9 in relation to the flow directions of the arrows 2 and 18 are set in such a way that the shafts are loaded with the desired amount of fiber material.

Die Ausführungsform gemäss Patentanspruch 2 erlaubt somit, die Zahl der Karden einer Gruppe, denen Fasermaterial der einen Art und die Zahl der Karden dieser Gruppe, denen Fasermaterial einer anderen Art zugeführt werden soll, beliebig zu wählen. Zur Durchführung müssen nur die Steuerorgane 12 entsprechend eingestellt werden, was einen äusserst einfachen Vorgang bedeutet.The embodiment according to claim 2 thus allows the number of cards in a group to which fiber material of one type and the number of cards in this group to which fiber material of another type is to be chosen as desired. To carry out, only the control members 12 have to be set accordingly, which means an extremely simple process.

Aus dem vorhergehenden ist ersichtlich, dass der Boden 20 des Kanals 1 unterhalb der Steuerorgane 12 gänzlich weggelassen werden kann. Im Falle von gemeinsamen Schwenkachsen 14 für die zwei sich zwischen benachbarten Füllschächten 4 bis 9 befindlichen Steuerorgane 12 sind die Schwenkachsen 14 durch von beiden Seitenwänden des Kanals getragene Wellen gebildet.From the foregoing it can be seen that the bottom 20 of the channel 1 below the control elements 12 can be omitted entirely. In the case of common pivot axes 14 for the two control elements 12 located between adjacent filling shafts 4 to 9, the pivot axes 14 are formed by waves carried by both side walls of the channel.

In bezug auf die Strömungsverhältnisse des Transportmediums wurden Untersuchungen durchgeführt. Der verwendete Kanal 1 besass eine Breite von 17 cm und eine Höhe von 40 cm. Im einen Fall betrug die gesamte, zugeführte Transportluftmenge 0,44 m3/s (Kubikmeter pro Sekunde). Es waren 6 Schächte vorhanden und deren Speisung erfolgte mittels eines im Schacht in nur einer Richtung fliessenden Transportmediums. Die in der Fig. 1 gezeigten Stellungen der Steuerorgane 12 stimmen mit den bei den Untersuchungen vorgelegenen nicht überein.Investigations were carried out with regard to the flow conditions of the transport medium. The channel 1 used had a width of 17 cm and a height of 40 cm. In one case, the total amount of transport air supplied was 0.44 m3 / s (cubic meters per second). There were 6 shafts and they were supplied by means of a transport medium flowing in the shaft in only one direction. The positions of the control elements 12 shown in FIG. 1 do not correspond to those in the examinations.

Für die Untersuchungen wurde berücksichtigt, dass einesteils im Spinnereibetrieb es sich als notwendig erweist, einzelne Karden einer Gruppe abstellen zu können, während die übrigen weiter arbeiten und dass andernteils die Geschwindigkeit des Transportfluidums, d.h. der Transportluft grösser als 2 m/s (Meter pro Sekunde) und kleiner als 10 m/s, vorzugsweise grösser als 3 m/s und kleiner als 8 m/s, sein soll. Bei zu kleiner Luftgeschwindigkeit fangen die Flocken an, mühevoll zu rollen und bei zu grosser Luftgeschwindigkeit fliegen sie über die Schächte hinweg.For the investigations, it was taken into account that one part of the spinning mill proves necessary to be able to park individual cards of a group, while the others continue to work, and the other part the speed of the transport fluid, i.e. the transport air should be greater than 2 m / s (meters per second) and less than 10 m / s, preferably greater than 3 m / s and less than 8 m / s. If the air speed is too low, the flakes start to roll with difficulty and if the air speed is too high they fly over the shafts.

Ergebnisse mit einer Reihe von sechs Schächten (wie z.B. die Schächte 4 bis 9 der Fig. l) sind in der nachfolgenden Tabelle 1 aufgeführt:

Figure imgb0001
Results with a series of six wells (like eg shafts 4 to 9 of Fig. 1) are listed in Table 1 below:
Figure imgb0001

Dabei sind

  • O = Grösse der Kanalöffnung in vertikaler Richtung vor dem Schacht in mm (Millimeter),
  • M = Luftmenge vor dem Schacht in m3/s,
  • V = Luftgeschwindigkeit vor dem Schacht in m/s,
  • Vl = Luftgeschwindigkeit vor dem Schacht wenn vorderster Schacht 4 geschlossen ist,
  • V2 = Luftgeschwindigkeit vor dem Schacht wenn die vordersten zwei Schächte 4 und 5 geschlossen sind,
  • V3 = Luftgeschwindigkeit vor dem Schacht wenn die vordersten drei Schächte 4 bis 6 geschlossen sind,
  • V4 = Luftgeschwindigkeit vor dem Schacht wenn die vordersten vier Schächte 4 bis 7 geschlossen sind.
Are
  • O = size of the channel opening in the vertical direction in front of the shaft in mm (millimeters),
  • M = air volume in front of the shaft in m3 / s,
  • V = air speed in front of the shaft in m / s,
  • Vl = air speed in front of the shaft when the front shaft 4 is closed,
  • V2 = air speed in front of the shaft when the foremost two shafts 4 and 5 are closed,
  • V3 = air speed in front of the shaft when the front three shafts 4 to 6 are closed,
  • V4 = air speed in front of the shaft when the four front shafts 4 to 7 are closed.

Es ist ersichtlich, dass die erfindungsgemässe Anlage bei insgesamt 6 beschickten Schächten ein vorübergehendes Abstellen bis zu drei Schächten zulässt. Im an sich möglichen, aber in der Praxis kaum eintretenden Fall, bei welchem von sechs Karden deren vier stillstehen, beginnen die Verhältnisse ungünstig zu werden, weil die Luftgeschwindigkeit beim ersten noch offenen, d.h. beim zweitletzten Schacht (Schacht 8), zu gross wird. Es kann allgemein gefolgert werden, dass bei einer Gruppe von Karden die erfindungsgemässe Anlage den Vorteil besitzt, das gleichzeitige Stillsetzen von ungefähr die Hälfte derselben ohne das Eintreten nachteiliger Folgen zu gestatten, ohne dass Steuerorgane durch Neueinstellung angepasst zu werden brauchen.It can be seen that the system according to the invention with a total of 6 loaded shafts, up to three shafts can be temporarily parked. In the case that is possible per se, but hardly occurs in practice, in which of the six cards the four of them are standing still, the conditions begin to become unfavorable because the air speed becomes too high at the first, ie at the second to last shaft (shaft 8). It can generally be concluded that, in the case of a group of cards, the system according to the invention has the advantage of allowing approximately half of them to be stopped at the same time without the occurrence of disadvantageous consequences, without the need for control organs to be readjusted.

Wird jedoch die Luftzufuhr zu den Schächten, d.h. zum Kanal bei einer Zunahme der geschlossenen Schächte reduziert, so werden die Verhältnisse günstiger. Bei dem Kanal zugeführten Gesamtluftmengen von

  • 0,41 m3/s bei einem geschlossenen Schacht,
  • 0,38 m3/s bei zwei geschlossenen Schächten,
  • 0,36 m3/s bei drei
  • 0,33 m3/s bei vier " "
  • 0,30 m3/s bei fünf " "

ergaben sich bei einer Gesamtzahl von sechs Schächten folgende Luftgeschwindigkeiten:
Figure imgb0002
Figure imgb0003
 However, if the air supply to the shafts, ie to the duct, is reduced when the closed shafts increase, the conditions become more favorable. Total air volume supplied to the duct of
  • 0.41 m3 / s with a closed shaft,
  • 0.38 m3 / s with two closed shafts,
  • 0.36 m3 / s at three
  • 0.33 m3 / s at four ""
  • 0.30 m3 / s at five ""

The following air speeds resulted from a total of six shafts:
Figure imgb0002
Figure imgb0003

Die Bedeutung der Werte in den verschiedenen Kolonnen ist dieselbe wie in der Tabelle 1.The meaning of the values in the different columns is the same as in Table 1.

Es ist ersichtlich, dass bei vier geschlossenen Schächten sich die Geschwindigkeiten der Transportluft noch innerhalb des zwischen 2 m/s und 10 m/s liegenden Bereichs befinden. Sollte also der Fall eintreten, dass von sechs Karden deren vier gleichzeitig stillgesetzt werden müssen, so kann dies durchgeführt werden, indem die Speiseluftmenge etwas reduziert wird. Eine solche Reduktion der Speiseluftmenge kann z.B. durch eine dafür vorgesehene Regulierung des Gebläsemotors oder durch ein für diesen Zweck vorgesehenes Verändern eines Uebersetzungsverhältnisses im Getriebe, durchgeführt werden.It can be seen that with four closed shafts, the speeds of the transport air are still within the range between 2 m / s and 10 m / s. If the case arises that four of the six cards have to be shut down at the same time, this can be done by slightly reducing the amount of supply air. Such a reduction in the amount of feed air can e.g. by means of a regulation of the blower motor provided for this purpose or by changing a gear ratio in the transmission provided for this purpose.

Claims (9)

1. Pneumatische Transportanlage für Faserflocken zum Beschicken einer Mehrzahl von Karden mittels eines durch einen Kanal fliessenden Transportmediums durch Querspeisung, wobei der Kanal einen gleichbleibenden, rechteckigen Querschnitt aufweist, in dessen Innern dem Steuern des Mediums dienende Steuerplatten vorgesehen sind, welche an senkrecht zur Längsrichtung des Kanals angeordneten, sich an der Bodenfläche des Kanals befindlichen Schwenkachsen schwenkbar befestigt sind und in ihrer Offenstellung am Kanalboden aufliegen, dadurch gekennzeichnet, dass zwischen je zwei benachbarten Füllschächten (4 bis 9) zwei, je eine Steuerplatte (13) und je eine Sperrwand (15) umfassende Steuerorgane (12) vorgesehen sind, von denen jedes Steuerorgan (12) je einem der benachbarten Schächte (4 bis 9) zugeordnet ist und diese zwei Steuerorgane (12) in ihrer Offenstellung in bezug auf die von diesen benachbarten Schächten (4 bis 9) den gleichen Abstand aufweisende und zum Kanal (1) senkrechte Ebene spiegelbildlich zueinander sind, dass sich jede Steuerplatte (13) mit ihrem der Schwenkachse (14) abgewandten Ende gegen den ihr zugeordneten Schacht (4 bis 9) hin erstreckt, dass an diesem Ende eine Sperrwand (15) befestigt ist, welche sich von diesem Ende weg nach unten erstreckt und in allen Schwenkstellungen der Steuerplatte (13) in den Schacht (4 bis 9) eingetaucht ist, und dass die Steuerplatten (13) in beliebige Schwenkstellungen einstellbar und in diesen fixierbar sind.1. Pneumatic transport system for fiber flakes for loading a plurality of cards by means of a transport medium flowing through a channel by transverse feeding, the channel having a constant, rectangular cross section, inside the control plates serving to control the medium are provided, which are perpendicular to the longitudinal direction of the Channel swivel axes arranged on the bottom surface of the channel are pivotably attached and rest in their open position on the channel floor, characterized in that between two adjacent filling shafts (4 to 9) two, each one control plate (13) and one barrier wall (15 ) comprehensive control elements (12) are provided, of which each control element (12) is assigned to one of the adjacent shafts (4 to 9) and these two control elements (12) in their open position with respect to the shafts adjacent to them (4 to 9 ) play at the same distance and perpendicular to the channel (1) The fact that each control plate (13) with its end facing away from the pivot axis (14) extends towards the shaft (4 to 9) assigned to it, that a barrier wall (15) is attached to this end, which extends from this end extends downwards and is immersed in all swivel positions of the control plate (13) in the shaft (4 to 9), and that the control plates (13) can be adjusted in any swivel positions and can be fixed in them. 2. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerorgane (12) wahlweise in eine Schliessstellung einstellbar sind, in welcher ihre Sperrwände (15) ein Absperren des Transportmediums im Kanal (1) bewirken.2. System according to claim 1, characterized in that the control members (12) are optionally adjustable in a closed position, in which their barrier walls (15) block the transport medium in the channel (1). 3. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die sich zwischen je zwei benachbarten Füllschächten (4 bis 9) befindlichen Steuerplatten (13) an einer gemeinsamen Schwenkachse (14) schwenkbar befestigt sind.3. Plant according to claim 1, characterized in that the control plates (13) located between two adjacent filling shafts (4 to 9) are pivotally attached to a common pivot axis (14). 4. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass durch die Wahl der Einstellung der Steuerelemente (12) und/oder durch die Wahl der Menge des dem Kanal (1) zugeführten Transportmediums dessen Geschwindigkeit im Kanal (1) unmittelbar vor jedem Schacht mehr als 2 m/s und weniger als 10 m/s, vorzugsweise mehr als 3 m/s und weniger als 8 m/s beträgt.4. Plant according to claim 1, characterized in that by the choice of the setting of the control elements (12) and / or by the choice of the amount of the transport medium supplied to the channel (1), the speed in the channel (1) immediately before each shaft more than 2 m / s and less than 10 m / s, preferably more than 3 m / s and less than 8 m / s. 5. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass der Kanal (1) einen Querschnitt aufweist, dessen Breite und Höhe ungefähr 17 cm bzw. 40 cm betragen.5. Plant according to claim 1, characterized in that the channel (1) has a cross section, the width and height of which are approximately 17 cm and 40 cm, respectively. 6. Anlage nach Anpruch 2, dadurch gekennzeichnet, dass dem Kanal (1) an seinem einen Ende Fasermaterial der einen Art und an seinem anderen Ende Fasermaterial einer andern Art zugeführt wird und dass zwischen dem letzten Schacht (6) für das Fasermaterial der einen Art und dem letzten Schacht (7) für das Fasermaterial der anderen Art sich die Steuerorgane (12) in ihrer Schliessstellung befinden.6. Plant according to claim 2, characterized in that the channel (1) is fed at one end of fiber material of one type and at its other end fiber material of another type and that between the last shaft (6) for the fiber material of one type and the last shaft (7) for the fiber material of the others Kind are the control organs (12) in their closed position. 7. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die Sperrwände (15), mit ihren Schwenkachsen (14) als Krümmungszentrum, bogenförmig ausgebildet sind.7. Plant according to claim 1, characterized in that the barrier walls (15), with their pivot axes (14) as a center of curvature, are arcuate. 8. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass unterhalb der Steuerorgane (12) der Kanal (1) keinen Kanalboden aufweist.8. Plant according to claim 1, characterized in that below the control members (12) the channel (1) has no channel bottom. 9. Anlage nach Ansprüchen 3 und 8, dadurch gekennzeichnet, dass die Schwenkachsen (14) durch von den Seitenwänden des Schachtes (1) getragenen Wellen gebildet sind.9. Plant according to claims 3 and 8, characterized in that the pivot axes (14) are formed by waves from the side walls of the shaft (1).
EP85106725A 1984-08-28 1985-05-31 Apparatus for the pneumatic transport of fibre flocks Expired EP0175056B1 (en)

Priority Applications (1)

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AT85106725T ATE32918T1 (en) 1984-08-28 1985-05-31 PNEUMATIC TRANSPORT SYSTEM FOR FIBER FLAKES.

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CH411984 1984-08-28

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DE102004060403A1 (en) * 2004-12-14 2006-07-06 Trützschler GmbH & Co KG Device in the spinning preparation for feeding a plurality of filling shafts, in particular mixers, with fiber material
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US4648754A (en) 1987-03-10
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