EP0303887A1 - Apparatus for the heat treatment of a web of material - Google Patents

Apparatus for the heat treatment of a web of material Download PDF

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Publication number
EP0303887A1
EP0303887A1 EP88112556A EP88112556A EP0303887A1 EP 0303887 A1 EP0303887 A1 EP 0303887A1 EP 88112556 A EP88112556 A EP 88112556A EP 88112556 A EP88112556 A EP 88112556A EP 0303887 A1 EP0303887 A1 EP 0303887A1
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EP
European Patent Office
Prior art keywords
bypass
fan
opening
web
return air
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
EP88112556A
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German (de)
French (fr)
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EP0303887B1 (en
Inventor
Harry Gresens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brueckner Trockentechnik GmbH and Co KG
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Brueckner Trockentechnik GmbH and Co KG
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Priority to AT88112556T priority Critical patent/ATE68872T1/en
Publication of EP0303887A1 publication Critical patent/EP0303887A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials

Definitions

  • the invention relates to a device (according to the preamble of claim 1) for the heat treatment of a continuously moving web.
  • Devices of this type are, in particular, tensioner dryers.
  • the drying air is circulated in the individual fields by means of fans, a bypass flap being provided in order to divert the drying air when the tensioning machine is at a standstill during production in such a way that it is no longer blown through the nozzles onto the web.
  • this bypass flap is provided in the F-shaped transition piece between the fan housing and the nozzle boxes arranged above it.
  • Such an embodiment has various disadvantages.
  • the invention is therefore based on the object avoiding these disadvantages, a device of the type mentioned in the preamble of claim 1 so that - with a simultaneously simplified construction of the device - the circulating air flowing out through the open bypass flap practically does not come into contact with the web.
  • the bypass opening By arranging the bypass opening in the lower region of the fan housing, the circulating air flowing out of this bypass opening when the bypass flap is open can reach the suction opening of the return air duct (like the fan housing located in the lower part of the device) without having to use the come in contact in the upper part of the device web. In this way, a real bypass flow of the circulating air is thus achieved when the bypass flap is open and any influence of the drying air on the stationary web is avoided.
  • the arrangement of the bypass opening in the lower region of the fan housing, ie on a ratio of the inlet side of the nozzle boxes moderately distant point also allows (especially in connection with some other design features yet to be discussed) when the bypass flap is open such a large pressure reduction on the inlet side of the nozzle boxes that even when the throttle valve is open, no significant airflow enters the nozzle boxes.
  • the solution according to the invention thus opens up the possibility of not having to close the throttle flaps when the bypass flaps are opened (thus leaving the throttle flaps in their normal operating position during bypass operation), which leads to a significantly simplified construction and control.
  • the fan housing is rectangular in a vertical longitudinal section, the bypass opening being arranged in a side wall of this fan housing, which is formed by a flat, vertically arranged surface.
  • the intake opening of a return air duct is located directly opposite the bypass opening of the adjacent treatment zone, and at approximately the same height (in the lower part of the tensioning machine) and at a relatively short distance.
  • the bypass air flowing out through the bypass opening reaches the return air duct of the adjacent treatment zone in the shortest possible way (and practically without any contact with the material web located much higher than the flow path of the bypass air).
  • a tensioning machine dryer is shown as a device for the heat treatment of a continuously moving web 1, which contains a plurality of treatment zones 2, 2a, 2b, etc., which follow one another in the direction of movement of the web.
  • It contains a fan 3 which serves to promote a circulating air flow and which is driven by a motor 5 arranged outside the machine housing 4.
  • the fan 5 is arranged in a fan housing 6 which has a rectangular shape in a vertical longitudinal section (perpendicular to the plane of the drawing in FIG. 2).
  • the fan housing 6 At the top of the fan housing 6 there is an F-shaped transition piece 7, with which a group of upper nozzle boxes 8 and lower nozzle boxes 9 are connected (the individual nozzle boxes belonging to a group lie in the direction of movement of the web, ie perpendicular to the plane of the drawing) Fig.1, a short distance behind each other).
  • a return air duct 11 which is provided at one end with one or two suction openings 12a, 12b closed by a grille and at its other end via a connecting piece 13 with the suction side of the fan 3 connected is.
  • adjustable throttle valves 14, 15 are arranged, which can be pivoted about axes 14a, 15a and, depending on their position, the air flow entering the nozzle boxes 8 and 9, respectively throttle more or less.
  • the fans (e.g. 3, 3a) of adjacent treatment zones (e.g. 2, 2a) are each arranged on different long sides of the device.
  • An approximately rectangular bypass opening is provided in the side wall of the fan housing 6 facing the return air duct (e.g. 11a) of the adjacent treatment zone (e.g. 2a), which can be opened or closed by a bypass flap 16.
  • the bypass opening of the fan housing 6 which is opened or closed by the bypass flap 16 is located directly opposite (and, as can be seen from FIG. 1, at approximately the same height) to the suction opening 12a of the return air duct 11a the neighboring treatment zone.
  • the side wall of the fan housing provided with the bypass opening is replaced by a flat, vertically arranged one Surface formed.
  • the bypass flap 16 can be pivoted by means of a vertical actuating shaft 17, which is mounted in the machine housing 4, the upper end of this actuating shaft 17, which is used to engage a pneumatic or electrical actuator, being passed through the ceiling of the machine housing 4.
  • a bypass opening with a bypass flap 16, 16 ' is provided in both side walls of the fan housing 6 facing the return air channels of the adjacent treatment zones.
  • the return air duct 11 can, as already mentioned above, also be provided on both sides with a suction opening 12a, 12b, but it is in principle also possible to make do with a single suction opening 12a.
  • bypass flaps 16 are closed and the throttle flaps 14, 15 are more or less open.
  • the drying air circulated by the fan 3 is blown through the nozzle boxes 8 and 9 onto the material web 1 and passes through the return air duct 11 back to the fan 3 (filter and heating devices can be provided in the return air duct 11 in a known manner).
  • bypass flaps 16, 16 ' open, while the throttle flaps 14, 15 can remain in their operating position if desired.
  • the pressure in the fan housing 6 and in particular in the F-shaped transition piece 7 located above it completely collapses, so that practically no air flows into the nozzle boxes 8 and 9 even when the throttle valves 14, 15 are open .
  • the drying air circulated by the fan 3 rather exits through the opened bypass flaps 16, 16 '(cf. arrows 18 in FIG. 2) and reaches the directly opposite suction openings 12a, 12b of the adjacent compressed air ducts by the shortest route. In this way there is a circulation of the bypass air in the lower area of the chamber 10, i.e. far below the web 1, which is practically not touched by the bypass air. In this way, an undesired exposure to air of the stationary web is definitely avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The invention relates to an apparatus for the heat treatment of a continuously moving web of material (1), in which a bypass flap (16) for closing or opening a bypass opening provided in the fan housing (6) is provided, which is arranged lower than the web of material (1). In this manner, the flow path (18) of the bypass air is formed, in bypass operation, exclusively in the lower region of the chamber (10) so that the web of material (1) is not affected by the bypass air.

Description

Die Erfindung betrifft eine Vorrichtung (ent­sprechend dem Oberbegriff des Anspruches 1) zur Wärmebehandlung einer kontinuierlich bewegten Warenbahn.The invention relates to a device (according to the preamble of claim 1) for the heat treatment of a continuously moving web.

Vorrichtungen dieser Art sind insbesondere Spann­maschinentrockner. Hierbei wird die Trocknungsluft in den einzelnen Feldern mittels Ventilatoren um­gewälzt, wobei eine Bypass-Klappe vorgesehen ist, um bei einem Stillstand der Spannmaschine während der Produktion die Trocknungsluft so umzuleiten, daß sie nicht mehr durch die Düsen auf die Waren­bahn geblasen wird.Devices of this type are, in particular, tensioner dryers. Here, the drying air is circulated in the individual fields by means of fans, a bypass flap being provided in order to divert the drying air when the tensioning machine is at a standstill during production in such a way that it is no longer blown through the nozzles onto the web.

Bei den bisher bekannten Ausführungen ist diese Bypass-Klappe in dem F-förmig gestalteten Über­gangsstück zwischen dem Ventilatorgehäuse und den darüber angeordneten Düsenkästen vorgesehen. Eine derartige Ausführung ist mit verschiedenen Nachteilen behaftet.In the previously known designs, this bypass flap is provided in the F-shaped transition piece between the fan housing and the nozzle boxes arranged above it. Such an embodiment has various disadvantages.

Die durch die geöffnete Bypass-Klappe austretende Trocknungsluft wird zwar nicht durch die Düsen­kästen auf die Warenbahn geblasen, tritt jedoch in den auch die Warenbahn enthaltenden oberen Bereich des Spannmaschinenfeldes aus. Wenn diese Bypass-Luft aus diesem oberen Bereich des Spann­ maschinenfeldes zu der im unteren Teil des Spann­maschinenfeldes befindlichen Ansaugöffnung des Rückluftkanales zurückströmt, kommt sie zwangs­läufig mit der Warenbahn in Berührung, was den erwünschten Bypass-Effekt beeinträchtigt.The drying air escaping through the open bypass flap is not blown through the nozzle boxes onto the web, but exits into the upper area of the tensioning machine field which also contains the web. If this bypass air from this upper area of the instep machine field flows back to the suction opening of the return air duct located in the lower part of the tensioning machine field, it inevitably comes into contact with the material web, which impairs the desired bypass effect.

Nachteilig ist weiterhin, daß eine im Übergangs­stück zwischen Ventilator und Düsenkästen ange­ordnete Bypass-Klappe aus konstruktiven Gründen (bedingt durch die Anordnung und Größe dieser Bypass-Klappe) keinen so vollständigen Druckabbau am Eintritt der Düsenkästen ermöglicht, daß ohne Schließen der vor den Düsenkästen befindlichen Drosselklappen ein Luftaustritt durch die Düsen verhindert werden kann. Um einen solchen Luftaustritt durch die Düsen bei geöffneter By-­pass-Klappe vollständig auszuschließen, müssen daher bei den bekannten Ausführungen die Drossel­klappen der Düsenkästen geschlossen werden. Da jedoch diese Drosselklappen im Betrieb im allge­meinen in einer Zwischenstellung stehen und beim Wiederanfahren der Maschine und Schließen der Bypass-Klappe wieder in diese zuvor vorhandene Zwischenstellung gebracht werden müssen, ist bei den bekannten Ausführungen eine komplizierte Steuereinrichtung für die Betätigung der Drossel­klappen in Verbindung mit dem Öffnen und Schließen der Bypass-Klappen notwendig.Another disadvantage is that a bypass flap arranged in the transition piece between the fan and the nozzle boxes, for structural reasons (due to the arrangement and size of this bypass valve), does not allow such complete pressure reduction at the inlet of the nozzle boxes that without closing the throttle valves located in front of the nozzle boxes air leakage through the nozzles can be prevented. In order to completely rule out such air leakage through the nozzles when the by-pass flap is open, the throttle flaps of the nozzle boxes must therefore be closed in the known designs. However, since these throttle valves are generally in an intermediate position during operation and must be brought back into this previously existing intermediate position when the machine is restarted and the bypass valve is closed, in the known designs a complicated control device for actuating the throttle valves in connection with the Opening and closing of the bypass flaps is necessary.

Der Erfindung liegt daher die Aufgabe zugrunde, unter Vermeidung dieser Nachteile eine Vorrichtung der im Oberbegriff des Anspruches 1 genannten Art so auszubilden, daß - bei zugleich vereinfachter Bauweise der Vorrichtung - die durch die geöffnete Bypass-Klappe ausströmende Umluft mit der Waren­bahn praktisch nicht in Berührung kommt.The invention is therefore based on the object avoiding these disadvantages, a device of the type mentioned in the preamble of claim 1 so that - with a simultaneously simplified construction of the device - the circulating air flowing out through the open bypass flap practically does not come into contact with the web.

Diese Aufgabe wird erfindungsgemäß durch das kenn­zeichnende Merkmal des Anspruches 1 gelöst.This object is achieved by the characterizing feature of claim 1.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Appropriate embodiments of the invention are the subject of the dependent claims.

Indem die Bypass-Öffnung im unteren Bereich des Ventilatorgehäuses angeordnet ist, kann die aus dieser Bypass-Öffnung bei geöffneter Bypass-Klappe ausströmende Umluft zu der (ebenso wie das Venti­latorgehäuse im unteren Teil der Vorrichtung be­findlichen) Ansaugöffnung des Rückluftkanales gelangen, ohne hierbei mit der im oberen Teil der Vorrichtung befindlichen Warenbahn in Berührung zu kommen. Auf diese Weise wird somit bei geöff­neter Bypass-Klappe eine echte Bypass-Strömung der Umluft erreicht und jegliche Einwirkung der Trocknungsluft auf die stillstehende Warenbahn vermieden.By arranging the bypass opening in the lower region of the fan housing, the circulating air flowing out of this bypass opening when the bypass flap is open can reach the suction opening of the return air duct (like the fan housing located in the lower part of the device) without having to use the come in contact in the upper part of the device web. In this way, a real bypass flow of the circulating air is thus achieved when the bypass flap is open and any influence of the drying air on the stationary web is avoided.

Die Anordnung der Bypass-Öffnung im unteren Be­reich des Ventilatorgehäuses, d.h. an einer von der Eintrittsseite der Düsenkästen verhältnis­ mäßig weit entfernten Stelle ermöglicht ferner (insbesondere in Verbindung mit einigen weiteren, noch zu erörternden konstruktiven Merkmalen) bei geöffneter Bypass-Klappe einen so weitgehenden Druckabbau an der Eintrittsseite der Düsenkästen, daß auch bei geöffneten Drosselklappen kein nen­nenswerter Luftstrom in die Düsenkästen eintritt. Die erfindungsgemäße Lösung eröffnet damit die Möglichkeit, auf ein Schließen der Drosselklappen beim Öffnen der Bypass-Klappen zu verzichten (die Drosselklappen somit während des Bypass-Betriebes in ihrer normalen Betriebsstellung zu belassen), was zu einer wesentlich vereinfachten Konstruktion und Steuerung führt.The arrangement of the bypass opening in the lower region of the fan housing, ie on a ratio of the inlet side of the nozzle boxes moderately distant point also allows (especially in connection with some other design features yet to be discussed) when the bypass flap is open such a large pressure reduction on the inlet side of the nozzle boxes that even when the throttle valve is open, no significant airflow enters the nozzle boxes. The solution according to the invention thus opens up the possibility of not having to close the throttle flaps when the bypass flaps are opened (thus leaving the throttle flaps in their normal operating position during bypass operation), which leads to a significantly simplified construction and control.

Gemäß einer zweckmäßigen Ausgestaltung der Er­findung ist das Ventilatorgehäuse in einem verti­kalen Längsschnitt rechteckig gestaltet, wobei die Bypass-Öffnung in einer Seitenwand dieses Ventilatorgehäuses angeordnet ist, die durch eine ebene, vertikal angeordnete Fläche gebildet wird. Eine solche Ausführung ermöglicht auf ein­fache Weise eine besonders große Bypass-Öffnung in unmittelbarer Nähe der druckerzeugenden Venti­latorschaufeln. Die gesamte durch den Ventilator geförderte Luft tritt auf diese Weise bei geöff­neter Bypass-Klappe durch die Bypass-Öffnung aus, während an der Eintrittsseite der wesentlich höher angeordneten Düsenkästen der Druck und damit die Düsenströmung vollständig zusammenbricht.According to an expedient embodiment of the invention, the fan housing is rectangular in a vertical longitudinal section, the bypass opening being arranged in a side wall of this fan housing, which is formed by a flat, vertically arranged surface. Such a design enables a particularly large bypass opening in the immediate vicinity of the pressure-generating fan blades in a simple manner. In this way, all the air conveyed by the fan exits through the bypass opening when the bypass flap is open, while the pressure and thus the nozzle flow completely collapse on the inlet side of the much higher nozzle boxes.

Sind die Ventilatoren benachbarter Behandlungszonen jeweils an unterschiedlichen Längsseiten der Vor­richtung angeordnet, so befindet sich die Ansaug­öffnung eines Rückluftkanales jeweils direkt ge­genüberliegend zur Bypass-Öffnung der benachbarten Behandlungszone, und zwar auf etwa gleicher Höhe (im unteren Teil der Spannmaschine) und in ver­hältnismäßig kurzer Entfernung. Die durch die By­pass-Öffnung ausströmende Bypass-Luft gelangt in­folgedessen auf kürzestem Wege (und praktisch ohne jede Berührung mit der wesentlich höher als der Strömungsweg der Bypass-Luft befindlichen Waren­bahn) in den Rückluftkanal der benachbarten Be­handlungszone.If the fans of adjacent treatment zones are each arranged on different long sides of the device, the intake opening of a return air duct is located directly opposite the bypass opening of the adjacent treatment zone, and at approximately the same height (in the lower part of the tensioning machine) and at a relatively short distance. As a result, the bypass air flowing out through the bypass opening reaches the return air duct of the adjacent treatment zone in the shortest possible way (and practically without any contact with the material web located much higher than the flow path of the bypass air).

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht. Es zeigen

  • Fig.1 einen Querschnitt durch eine Behand­lungszone der erfindungsgemäßen Vor­richtung,
  • Fig.2 einen Längsschnitt (längs der Linie II-II der Fig.1).
An embodiment of the invention is illustrated in the drawing. Show it
  • 1 shows a cross section through a treatment zone of the device according to the invention,
  • 2 shows a longitudinal section (along the line II-II of Fig.1).

Als Vorrichtung zur Wärmebehandlung einer konti­nuierlich bewegten Warenbahn 1 ist ein Spannma­schinentrockner dargestellt, der eine Vielzahl von in Bewegungsrichtung der Warenbahn aufeinander­folgenden Behandlungszonen 2, 2a, 2b usw. enthält.A tensioning machine dryer is shown as a device for the heat treatment of a continuously moving web 1, which contains a plurality of treatment zones 2, 2a, 2b, etc., which follow one another in the direction of movement of the web.

Da diese Behandlungszonen gleichartig ausgebildet sind, sei im folgenden eine solche Zone näher er­läutert.Since these treatment zones are designed in the same way, such a zone will be explained in more detail below.

Sie enthält einen zur Förderung eines Umluftstromes dienenden Ventilator 3, der durch einen außerhalb des Maschinengehäuses 4 angeordneten Motor 5 an­getrieben wird.It contains a fan 3 which serves to promote a circulating air flow and which is driven by a motor 5 arranged outside the machine housing 4.

Der Ventilator 5 ist in einem Ventilatorgehäuse 6 angeordnet, das in einem vertikalen Längsschnitt (senkrecht zur Zeichenebene der Fig.2) Rechteck­form besitzt.The fan 5 is arranged in a fan housing 6 which has a rectangular shape in a vertical longitudinal section (perpendicular to the plane of the drawing in FIG. 2).

An die Oberseite des Ventilatorgehäuses 6 schließt sich ein F-förmiges Übergangsstück 7 an, mit dem eine Gruppe von oberen Düsenkästen 8 und unteren Düsenkästen 9 verbunden sind (die einzelnen, zu einer Gruppe gehörenden Düsenkästen liegen in Be­wegungsrichtung der Warenbahn, d.h. senkrecht zur Zeichenebene der Fig.1, mit geringem Abstand hin­tereinander).At the top of the fan housing 6 there is an F-shaped transition piece 7, with which a group of upper nozzle boxes 8 and lower nozzle boxes 9 are connected (the individual nozzle boxes belonging to a group lie in the direction of movement of the web, ie perpendicular to the plane of the drawing) Fig.1, a short distance behind each other).

Im unteren Bereich der vom Maschinengehäuse 4 um­schlossenen Kammer 10 befindet sich ein Rückluft­kanal 11, der an seinem einen Ende mit einer oder zwei durch ein Gitter verschlossenen Ansaugöff­nungen 12a, 12b versehen ist und an seinem anderen Ende über einen Stutzen 13 mit der Saugseite des Ventilators 3 verbunden ist.In the lower area of the chamber 10 enclosed by the machine housing 4 there is a return air duct 11, which is provided at one end with one or two suction openings 12a, 12b closed by a grille and at its other end via a connecting piece 13 with the suction side of the fan 3 connected is.

In dem F-förmigen Übergangsstück 7 sind auf der Eintrittsseite der oberen und unteren Düsenkästen 8 bzw. 9 verstellbare Drosselklappen 14, 15 ange­ordnet, die um Achsen 14a, 15a schwenkbar sind und je nach ihrer Stellung den in die Düsenkästen 8 bzw. 9 eintretenden Luftstrom mehr oder weniger drosseln.In the F-shaped transition piece 7 on the inlet side of the upper and lower nozzle boxes 8 and 9, adjustable throttle valves 14, 15 are arranged, which can be pivoted about axes 14a, 15a and, depending on their position, the air flow entering the nozzle boxes 8 and 9, respectively throttle more or less.

Wie Fig.2 erkennen läßt, sind die Ventilatoren (z.B. 3, 3a) benachbarter Behandlungszonen (z.B. 2, 2a) jeweils an unterschiedlichen Längsseiten der Vorrichtung angeordnet.As can be seen in FIG. 2, the fans (e.g. 3, 3a) of adjacent treatment zones (e.g. 2, 2a) are each arranged on different long sides of the device.

In der dem Rückluftkanal (z.B. 11a) der benach­barten Behandlungszone (z.B. 2a) zugewandten Sei­tenwand des Ventilatorgehäuses 6 ist eine etwa rechteckige Bypass-Öffnung vorgesehen, die durch eine Bypass-Klappe 16 geöffnet oder abgesperrt werden kann. Wie Fig.2 erkennen läßt, befindet sich die durch die Bypass-Klappe 16 geöffnete oder geschlossene Bypass-Öffnung des Ventilator­gehäuses 6 unmittelbar gegenüberliegend (und, wie sich aus Fig.1 entnehmen läßt, auf etwa gleicher Höhe) zur Ansaugöffnung 12a des Rückluftkanales 11a der benachbarten Behandlungszone.An approximately rectangular bypass opening is provided in the side wall of the fan housing 6 facing the return air duct (e.g. 11a) of the adjacent treatment zone (e.g. 2a), which can be opened or closed by a bypass flap 16. As can be seen in FIG. 2, the bypass opening of the fan housing 6 which is opened or closed by the bypass flap 16 is located directly opposite (and, as can be seen from FIG. 1, at approximately the same height) to the suction opening 12a of the return air duct 11a the neighboring treatment zone.

Da das Ventilatorgehäuse 6 in einem vertikalen Längsschnitt rechteckig ist, wird die mit der Bypass-Öffnung versehene Seitenwand des Ventila­torgehäuses durch eine ebene, vertikal angeordnete Fläche gebildet.Since the fan housing 6 is rectangular in a vertical longitudinal section, the side wall of the fan housing provided with the bypass opening is replaced by a flat, vertically arranged one Surface formed.

Die Bypass-Klappe 16 ist mittels einer vertikalen Betätigungswelle 17 schwenkbar, die im Maschinen­gehäuse 4 gelagert ist, wobei das zum Angriff eines pneumatischen oder elektrischen Stellantrie­bes dienende obere Ende dieser Betätigungswelle 17 durch die Decke des Maschinengehäuses 4 hin­durchgeführt ist.The bypass flap 16 can be pivoted by means of a vertical actuating shaft 17, which is mounted in the machine housing 4, the upper end of this actuating shaft 17, which is used to engage a pneumatic or electrical actuator, being passed through the ceiling of the machine housing 4.

Bei dem in der Zeichnung veranschaulichten Aus­führungsbeispiel ist in beiden, den Rückluftkanälen der benachbarten Behandlungszonen zugewandten Sei­tenwänden des Ventilatorgehäuses 6 je eine Bypass-­Öffnung mit einer Bypass-Klappe 16, 16′ vorgesehen. Der Rückluftkanal 11 kann hierbei, wie oben be­reits erwähnt, gleichfalls auf beiden Seiten mit je einer Ansaugöffnung 12a, 12b versehen sein, doch ist es grundsätzlich auch möglich, mit einer einzigen Ansaugöffnung 12a auszukommen.In the exemplary embodiment illustrated in the drawing, a bypass opening with a bypass flap 16, 16 'is provided in both side walls of the fan housing 6 facing the return air channels of the adjacent treatment zones. The return air duct 11 can, as already mentioned above, also be provided on both sides with a suction opening 12a, 12b, but it is in principle also possible to make do with a single suction opening 12a.

Im Normalbetrieb der Spannmaschine sind die By­passklappen 16 geschlossen und die Drosselklappen 14, 15 mehr oder weniger geöffnet. Die durch den Ventilator 3 umgewälzte Trocknungsluft wird durch die Düsenkästen 8 und 9 auf die Warenbahn 1 ge­blasen und gelangt durch den Rückluftkanal 11 zurück zum Ventilator 3 (im Rückluftkanal 11 kön­nen dabei in bekannter Weise Filter- und Heizein­richtungen vorgesehen sein).During normal operation of the tensioning machine, the bypass flaps 16 are closed and the throttle flaps 14, 15 are more or less open. The drying air circulated by the fan 3 is blown through the nozzle boxes 8 and 9 onto the material web 1 and passes through the return air duct 11 back to the fan 3 (filter and heating devices can be provided in the return air duct 11 in a known manner).

Wird nun der Betrieb der Spannmaschine unterbrochen und die Warenbahn 1 stillgesetzt, so öffnen die Bypass-Klappen 16, 16′, während die Drosselklappen 14, 15 gewünschtenfalls in ihrer Betriebsstellung bleiben können. Durch das Öffnen der Bypass-Klappen 16, 16′ bricht der Druck im Ventilatorgehäuse 6 und insbesondere im darüber befindlichen F-förmigen Übergangsstück 7 vollständig zusammen, so daß auch bei geöffneten Drosselklappen 14, 15 praktisch keine Luft mehr in die Düsenkästen 8 und 9 ein­strömt. Die vom Ventilator 3 umgewälzte Trocknungs­luft tritt vielmehr durch die geöffneten Bypass­Klappen 16, 16′ aus (vgl. die Pfeile 18 in Fig.2) und gelangt auf kürzestem Wege in die direkt ge­genüberliegenden Ansaugöffnungen 12a, 12b der be­nachbarten Ruckluftkanäle. Auf diese Weise ergibt sich eine Zirkulation der Bypassluft im unteren Bereich der Kammer 10, d.h. weit unterhalb der Warenbahn 1, die von der Bypassluft praktisch nicht berührt wird. Auf diese Weise wird eine unerwünschte Luftbeaufschlagung der stillstehenden Warenbahn mit Sicherheit vermieden.If the operation of the tensioning machine is now interrupted and the web 1 stopped, the bypass flaps 16, 16 'open, while the throttle flaps 14, 15 can remain in their operating position if desired. By opening the bypass flaps 16, 16 ', the pressure in the fan housing 6 and in particular in the F-shaped transition piece 7 located above it completely collapses, so that practically no air flows into the nozzle boxes 8 and 9 even when the throttle valves 14, 15 are open . The drying air circulated by the fan 3 rather exits through the opened bypass flaps 16, 16 '(cf. arrows 18 in FIG. 2) and reaches the directly opposite suction openings 12a, 12b of the adjacent compressed air ducts by the shortest route. In this way there is a circulation of the bypass air in the lower area of the chamber 10, i.e. far below the web 1, which is practically not touched by the bypass air. In this way, an undesired exposure to air of the stationary web is definitely avoided.

Wird dann der Betrieb der Spannmaschine wieder auf­genommen, so schließen die Bypass-Klappen 16, 16′, so daß der Trocknungsluft in exakt gleicher Weise wie vor Unterbrechung des Betriebes durch die in der ursprünglichen Stellung befindlichen Dros­selklappen 14, 15 zur Warenbahn 1 gelangt.Then the operation of the tensioning machine is resumed, the bypass flaps 16, 16 'close, so that the drying air reaches the material web 1 in exactly the same way as before the interruption of operation by the throttle flaps 14, 15 in the original position.

Claims (8)

1. Vorrichtung zur Wärmebehandlung einer kontinu­ierlich bewegten Warenbahn (1) mittels eines Umluftstromes, enthaltend
a) einen zur Förderung des Umluftstromes die­nenden Ventilator (3), der innerhalb eines mit der Druckseite des Ventilators in Ver­bindung stehenden Gehäuses (6) angeordnet ist,
b) wenigstens einen an die Oberseite des Venti­latorgehäuses (6) angeschlossenen Düsenkasten (8, 9) zur Zuführung des Luftstromes zur Warenbahn,
c) einen tiefer als der Düsenkasten (8, 9) an­geordneten Rückluftkanal (11), der an seinem einen Ende mit einer Ansaugöffnung (12a) ver­sehen und an seinem anderen Ende an die Saug­seite des Ventilators (3) angeschlossen ist,
d) eine Bypass-Klappe (16) zum Absperren oder Öffnen einer im Ventilatorgehäuse (6) vorge­sehenen Bypass-Öffnung,
dadurch gekennzeichnet, daß
e) die Bypass-Öffnung tiefer als die Warenbahn (1) angeordnet ist.1. Device for the heat treatment of a continuously moving web (1) by means of a circulating air stream, containing
a) a fan (3) serving to promote the circulating air flow, which is arranged within a housing (6) connected to the pressure side of the fan,
b) at least one nozzle box (8, 9) connected to the top of the fan housing (6) for supplying the air flow to the web,
c) a return air duct (11) arranged lower than the nozzle box (8, 9), which is provided at one end with a suction opening (12a) and is connected at its other end to the suction side of the fan (3),
d) a bypass flap (16) for shutting off or opening a bypass opening provided in the fan housing (6),
characterized in that
e) the bypass opening deeper than the web (1) is arranged. 2. Vorrichtung nach Anspruch 1 mit mehreren in Be­wegungsrichtung der Warenbahn (1) aufeinander­folgenden Behandlungszonen (2, 2a, 2b), von denen jede einen Ventilator (3), wenigstens einen Düsenkasten (8, 9), einen Rückluftkanal (11) und eine Bypass-Klappe (16) enthält, wobei die Ventilatoren (z.B. 3, 3a) jeweils an unter­schiedlichen Längsseiten der Vorrichtung ange­ordnet sind, dadurch gekennzeichnet, daß die Bypass-Öffnung jeweils in der dem Rückluftkanal (11a) der benachbarten Behandlungszone (2a) zu­gewandten Seitenwand des Ventilatorgehäuses (6) angeordnet ist.2. Device according to claim 1 with a plurality of successive treatment zones (2, 2a, 2b) in the direction of movement of the web (1), each of which has a fan (3), at least one nozzle box (8, 9), a return air duct (11) and one Contains bypass flap (16), the fans (eg 3, 3a) being arranged on different longitudinal sides of the device, characterized in that the bypass opening is in each case in the side wall facing the return air duct (11a) of the adjacent treatment zone (2a) the fan housing (6) is arranged. 3. Vorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß die Ansaugöffnung (12a, 12b) jeweils in der der Bypass-Öffnung der benach­barten Behandlungszone zugewandten Seitenwand des Rückluftkanales (11a) angeordnet ist.3. Apparatus according to claim 2, characterized in that the suction opening (12a, 12b) is arranged in each case in the bypass opening of the adjacent treatment zone facing side wall of the return air duct (11a). 4. Vorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß die mit der Bypass-Öffnung ver­sehene Seitenwand des in einem vertikalen Längsschnitt rechteckigen Ventilatorgehäuses (6) durch eine ebene, vertikal angeordnete Fläche gebildet wird.4. The device according to claim 2, characterized in that the side wall provided with the bypass opening of the rectangular in a vertical longitudinal section fan housing (6) is formed by a flat, vertically arranged surface. 5. Vorrichtung nach Anspruch 2, dadurch gekenn­ zeichnet, daß in beiden, den Rückluftkanälen (11, 11a) der benachbarten Behandlungszonen zugewandten Seitenwänden des Ventilatorgehäuses (6) je eine Bypass-Öffnung angeordnet ist.5. The device according to claim 2, characterized shows that a bypass opening is arranged in each of the two side walls of the fan housing (6) facing the return air ducts (11, 11a) of the adjacent treatment zones. 6. Vorrichtung nach Anspruch 1, bei der den ein­zelnen Düsenkästen (8, 9) einstellbare Drossel­klappen (14, 15) zugeordnet sind, dadurch ge­kennzeichnet, daß die Bypass-Klappe (16) unab­hängig von den Drosselklappen (14, 15) betätig­bar ist.6. The device according to claim 1, in which the individual nozzle boxes (8, 9) are assigned adjustable throttle flaps (14, 15), characterized in that the bypass flap (16) can be actuated independently of the throttle flaps (14, 15). 7. Vorrichtung nach Anspruch 4, dadurch gekenn­zeichnet, daß die Bypass-Klappe (16) mittels einer vertikalen Betätigungswelle (17) schwenk­bar ist.7. The device according to claim 4, characterized in that the bypass flap (16) by means of a vertical actuating shaft (17) is pivotable. 8. Vorrichtung nach Anspruch 7, dadurch gekenn­zeichnet, daß die Betätigungswelle (17) der Bypass-Klappe (16) im Maschinengehäuse (4) der Vorrichtung gelagert und das zum Angriff eines pneumatischen oder elektrischen Stellantriebes dienende Ende dieser Betätigungswelle durch die Decke des Maschinengehäuses (4) hindurchgeführt ist.8. The device according to claim 7, characterized in that the actuating shaft (17) of the bypass flap (16) in the machine housing (4) of the device and the end serving to engage a pneumatic or electric actuator drive shaft of this actuator through the ceiling of the machine housing ( 4) is passed through.
EP88112556A 1987-08-16 1988-08-02 Apparatus for the heat treatment of a web of material Expired - Lifetime EP0303887B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112556T ATE68872T1 (en) 1987-08-16 1988-08-02 DEVICE FOR THE HEAT TREATMENT OF A WEB.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873727280 DE3727280A1 (en) 1987-08-16 1987-08-16 DEVICE FOR HEAT TREATMENT OF A TRACK
DE3727280 1987-08-16

Publications (2)

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EP0303887A1 true EP0303887A1 (en) 1989-02-22
EP0303887B1 EP0303887B1 (en) 1991-10-23

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ID=6333854

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EP88112556A Expired - Lifetime EP0303887B1 (en) 1987-08-16 1988-08-02 Apparatus for the heat treatment of a web of material

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EP (1) EP0303887B1 (en)
AT (1) ATE68872T1 (en)
DE (2) DE3727280A1 (en)
ES (1) ES2026230T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609938A1 (en) * 1993-02-01 1994-08-10 Stork Contiweb B.V. Drier with shortened restart
EP0935112A1 (en) * 1998-02-04 1999-08-11 Brückner Apparatebau GmbH Apparatus for the heat treatment of a web
US8222874B2 (en) 2007-06-26 2012-07-17 Vishay-Siliconix Current mode boost converter using slope compensation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844692A1 (en) * 1998-09-29 2000-03-30 Brueckner Apparatebau Gmbh Device for the heat treatment of a web

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Publication number Priority date Publication date Assignee Title
FR1121824A (en) * 1954-04-05 1956-08-27 Advanced dryer
FR2380516A1 (en) * 1977-02-11 1978-09-08 Artos Meier Windhorst Kg DEVICE FOR DRYING TEXTILE STRIPS, AND THE LIKE, TREATED OFFSHORE
US4137649A (en) * 1973-04-21 1979-02-06 Vepa Ag Apparatus for the heat treatment of textiles
EP0053269A2 (en) * 1980-12-03 1982-06-09 Brückner Trockentechnik GmbH & Co. KG Apparatus for heat-treating continous-web materials
EP0063642A1 (en) * 1981-04-28 1982-11-03 Brückner Trockentechnik GmbH & Co. KG Apparatus for hot-air drying of textile materials
GB2147629A (en) * 1983-10-06 1985-05-15 Monforts Gmbh & Co A Drying and/or fixing machine
GB2194030A (en) * 1986-08-16 1988-02-24 Monforts Gmbh & Co A Haltable textile web dryer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3419531A1 (en) * 1984-05-25 1985-11-28 Babcock Textilmaschinen GmbH, 2105 Seevetal ARRANGEMENT FOR PREVENTING DAMAGE TO PRODUCT LINES IN DRY HEAT TREATMENT BY MEANS OF FLOWING TREATMENT AGENTS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1121824A (en) * 1954-04-05 1956-08-27 Advanced dryer
US4137649A (en) * 1973-04-21 1979-02-06 Vepa Ag Apparatus for the heat treatment of textiles
FR2380516A1 (en) * 1977-02-11 1978-09-08 Artos Meier Windhorst Kg DEVICE FOR DRYING TEXTILE STRIPS, AND THE LIKE, TREATED OFFSHORE
EP0053269A2 (en) * 1980-12-03 1982-06-09 Brückner Trockentechnik GmbH & Co. KG Apparatus for heat-treating continous-web materials
EP0063642A1 (en) * 1981-04-28 1982-11-03 Brückner Trockentechnik GmbH & Co. KG Apparatus for hot-air drying of textile materials
GB2147629A (en) * 1983-10-06 1985-05-15 Monforts Gmbh & Co A Drying and/or fixing machine
GB2194030A (en) * 1986-08-16 1988-02-24 Monforts Gmbh & Co A Haltable textile web dryer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609938A1 (en) * 1993-02-01 1994-08-10 Stork Contiweb B.V. Drier with shortened restart
US5584131A (en) * 1993-02-01 1996-12-17 Stork Contiweb B.V. Drier with shortened restart
EP0935112A1 (en) * 1998-02-04 1999-08-11 Brückner Apparatebau GmbH Apparatus for the heat treatment of a web
US8222874B2 (en) 2007-06-26 2012-07-17 Vishay-Siliconix Current mode boost converter using slope compensation

Also Published As

Publication number Publication date
ES2026230T3 (en) 1992-04-16
ATE68872T1 (en) 1991-11-15
DE3727280A1 (en) 1989-03-02
EP0303887B1 (en) 1991-10-23
DE3865774D1 (en) 1991-11-28

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