EP1488014B1 - Method and device for convective heat transfer between a heat transfer medium and the front face of a wound metal strip in the form of a coil - Google Patents
Method and device for convective heat transfer between a heat transfer medium and the front face of a wound metal strip in the form of a coil Download PDFInfo
- Publication number
- EP1488014B1 EP1488014B1 EP03717151A EP03717151A EP1488014B1 EP 1488014 B1 EP1488014 B1 EP 1488014B1 EP 03717151 A EP03717151 A EP 03717151A EP 03717151 A EP03717151 A EP 03717151A EP 1488014 B1 EP1488014 B1 EP 1488014B1
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- EP
- European Patent Office
- Prior art keywords
- heat transfer
- coil
- transfer medium
- face
- wound metal
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
Definitions
- the invention relates to a method for convective Heat transfer between a heat transfer medium and an end face of a wound metal band in shape a coil in which the end face with the Heat transfer means by means of at least one nozzle wall is charged.
- the invention further relates to a device for Implementation of the method for convective heat transfer between a heat transfer medium and an end face a wound metal band in the form of a coil.
- the Japanese publication JP 05 177240 A describes also a method and a device for cooling from coils of metal bands by means of a water mist.
- the Device sees a nozzle on each side of the coil Creating a Nebcls ago. Again, the desired The aim of the lowest possible wetting and rusting achieved by a specific adjustment of the water mist.
- the object of the invention is therefore to provide a method for convective heat transfer between one Heat transfer means and a front side of a Metal bands in the form of a wound cylindrical coil, to provide with itself for metal bands different widths the highest possible heat transfer can achieve.
- the object of the invention is also a device for Implementation of the method for convective heat transfer provide.
- this object is achieved in a heat transfer method of the type mentioned in which a Front side of a metal band in the form of a wound coil by means of at least one nozzle wall with a Heat transfer medium is applied, thereby solved that the distance between at least one nozzle wall and the end face of the Metal band is set.
- the object is further achieved in that in one generic device for convective heat transfer between a heat transfer medium and an end face a metal band in the form of a wound coil means for Impingement of the end faces of the coil with the Heat transfer means by means of at least one nozzle wall are provided, wherein the distance between at least one Adjustable nozzle wall and the front side of the metal strip is.
- the Invention is a gas as a heat transfer medium promoted a pressure box in the nozzle walls and flows through the nozzles on the faces of the heated or to cooling coils.
- the nozzle walls are to Moveable along an axis that is the main axis of the coils corresponds or substantially parallel to this runs.
- the term "substantially” includes angles in the Order of magnitude of 0 to 10 °. For example Coil cylinders are treated with smaller bandwidths, let the nozzle walls along this axis in the direction move the end faces of the coil. So can the distance between nozzle wall and coil surface to an optimal Distance will be set, and it will always be one achieved effective flow.
- FIG. 1 is a section through a particularly preferred embodiment of a device for convective heat transfer between a Heat transfer means and an end face of a wound metal strip in the form of a cylindrical coil, shown.
- a heat transfer medium a fluid or a gas is used.
- a gas is used to transfer heat.
- the device comprises a pressure box 20 into which the heating or cooling coil 30 is introduced.
- the coil is a cylindrically wound Metal band.
- the illustrated metal band is about an axis 70 wrapped, which runs horizontally in the figure, so that Plan on the front sides 31 and 32 of the coil Surfaces arise. Essentially parallel to these End faces of the coil are each a nozzle wall 10 and 11.
- the gas for heating or cooling of the coils are introduced into the pressure box 20.
- the gas may be different types of gas suitable for the particular application.
- N 2 , N 2 H 2 , air, water vapor, inert gas, hydrogen, exogas, or endogas can be used.
- the flow of the gas within the pressure box is indicated graphically by arrows.
- the gas flows through the nozzle walls 10 and 11 on each one end side of the coil.
- the nozzle walls have for this purpose a plurality of openings, which may be formed differently.
- hole, slot, tube or swirl nozzles can be used.
- the gas flows out of the nozzle openings and bounces on the front sides of the coil, where the heat transfer takes place. This applies both to the heating and to the cooling of the coil material.
- the drive 40 for this movement is not shown in detail in FIG. 1, but characterized by horizontal movement arrows.
- Fig. 1 In the illustration in Fig. 1 are on the right side of the Coils two positions of the nozzle wall 11 with two various distances 60 shown. The position with the greater distance is through a dashed border shown. It is sufficient if only one of the Moving nozzle walls along the major axis of the coil, However, both nozzle walls can be made movable be. If only one nozzle wall is movable, one must additional positioning of the coil in the middle between done the nozzle walls. Are on the other hand both nozzle walls movable, the walls can be at the optimum distance to the End faces of the coil are brought.
- the distance 60 optimized so far be that without power losses a very good Heat transfer sets.
- the facilities are conventional designed for maximum coil size and insertion smaller coils leads to a flow, its effect below the maximum achievable.
- the sealing gap may be low or the seal designed as a labyrinth or contact seal become.
- FIG. 2 is a particularly preferred Embodiment of a chamber furnace with integrated erfindunmultier device for heat transfer shown.
- the pressure box 20 is located within the Furnace and to be heated or cooled coil 30 is positioned between the two nozzle walls 10 and 11.
- the Charging the furnace with a coil takes place in this Embodiment from below, which is graphically below the chamber of the furnace represented by dashed lines is.
- the control of the chamber furnace is preferably via Control means with a program that expediently at least the temperature and the speed of the Heat transfer medium and the distance between Nozzle walls and coil controls and regulates that as optimal as possible heat transfer sets.
- the inventive embodiment of a device with Nozzle walls whose distance to the end faces of the is adjustable to heating or cooling coils has different advantages.
- the decor can be so on the respective coil dimensions are adjusted that always an effective flow is guaranteed. from that results in a better heat transfer than in conventional Facilities, reducing the residence time of the workpieces in the ovens can be lowered. This in turn allows Energy savings and a reduction in throughput times.
- the installation of a separating nozzle box improves the Utilization of the plant additionally.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und einer Stirnfläche eines gewickelten Metallbandes in Form eines Coils, bei dem die Stirnfläche mit dem Wärmeübertragungsmittel mittels wenigstens einer Düsenwand beaufschlagt wird.The invention relates to a method for convective Heat transfer between a heat transfer medium and an end face of a wound metal band in shape a coil in which the end face with the Heat transfer means by means of at least one nozzle wall is charged.
Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des Verfahrens zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und einer Stirnfläche eines gewickelten Metallbandes in Form eines Coils.The invention further relates to a device for Implementation of the method for convective heat transfer between a heat transfer medium and an end face a wound metal band in the form of a coil.
Bei der Wärmebehandlung von Werkstücken spielt die Wärmeübertragung durch erzwungene Konvektion eine große Rolle, da sich durch sie große Leistungen übertragen und gleichmäßige Temperaturverteilungen erreichen lassen.In the heat treatment of workpieces plays the Heat transfer by forced convection a big one Role, because they translate into great achievements and achieve uniform temperature distributions.
In der Praxis ist bei diesem Verfahren des Wärmeübergangs
von einem strömenden Fluid oder Gas auf ein Werkstück eine
besonders gleichmäßige Beaufschlagung des Werkstücks mit dem
jeweiligen Wärmeübertragungsmittel erforderlich, da hier ein
gleichmäßiger Wärmeübergang gewährleistet sein muss, ohne
dass Unterschiede im örtlichen Wärmeübergang zu einer
unterschiedlichen Aufheizung des Werkstücks führen. Die
gleichmäßige Beaufschlagung stellt beispielsweise beim
Erwärmen von Metallbändern, welche zu zylindrischen Coils
aufgewickelt sind, ein großes Problem dar. Die Erwärmung
Neue Beschreibungsseiten:
derartiger Coils erfolgt typischerweise in Kammeröfen, in
denen zur Verringerung der Glüh- und Verweilzeit der
werkstücke ein möglichst hoher Wärmeübergang angestrebt wird.In practice, in this method of heat transfer from a flowing fluid or gas to a workpiece a particularly uniform loading of the workpiece with the respective heat transfer medium is required, since a uniform heat transfer must be ensured without differences in the local heat transfer to a different heating of the Lead workpiece. The uniform application is for example a great problem when heating metal strips, which are wound into cylindrical coils. The heating New description pages:
Such coils is typically in chamber furnaces in which the highest possible heat transfer is sought to reduce the annealing and residence time of the workpieces.
Aus der Praxis der konvektiven Erwärmung von Metallbändern in Form von gewickelten Coils sind Düsenwände bekannt, über die ein Fluid oder Gas auf die Stirnfläche eines zylindrischen Coils geblasen wird.From the practice of convective heating of metal strips in Form of wound coils are known about the nozzle walls a fluid or gas on the end face of a cylindrical Coils is blown.
Beiden bekannten gattungsgemäßen Kamrneröfen mit derartigen Düsenwänden ist es jedoch nachteilig, dass die Einrichtungen nur auf eine Coilgröße ausgelegt sind. Sollen beispielsweise Coils mit kleineren Bandbreiten erwärmt werden, ist der Kammerofen nicht optimal ausgelegt, da der Abstand zwischen Düsen und Coil zu groß ist, um einen möglichst maximalen Wärmeübergang zu realisieren.Both known generic Kamrneröfen with such However, nozzle walls, it is disadvantageous that the facilities are designed only for one coil size. For example Coils heated with smaller bandwidths is the Chamber furnace not optimally designed, as the distance between Nozzles and coil is too big to maximize as possible Heat transfer to realize.
Aus der Japanischen Druckschrift JP 10 328738 A ist beispielsweise ein Verfahren und eine Vorrichtung zur Kühlung von Coils aus Metallbändern bekannt, bei dem die Stirnflächen mit einem wassernebel besprüht werden. Damit das Coil nicht durchnässt wird und so die Rostbildung vermieden werden kann, wird das Coil mit einem Nebel mit spezifischen Parametern beaufschlagt. Ferner werden die Öffnung und der Winkel verschiedener Düsen zum Coil individuell eingestellt.From Japanese Publication JP 10 328738 A is For example, a method and apparatus for cooling of coils of metal bands known, in which the end faces be sprayed with a water mist. So that the coil is not is soaked and so rust formation can be avoided becomes the coil with a fog with specific parameters applied. Further, the opening and the angle different nozzles set to coil individually.
Die Japanische Druckschrift JP 05 177240 A beschreibt ebenfalls ein Verfahren und eine Vorrichtung zur Abkühlung vom Coils aus Metallbändern mittels eines wassernebels. Die Vorrichtung sieht auf jeder Seite des Coils eine Düse zur Erzeugung eines Nebcls vor. Auch hier wird das angestrebte Ziel einer möglichst geringen Durchnässung und Rostbildung durch eine spezifische Einstellung des Wassernebels erreicht.The Japanese publication JP 05 177240 A describes also a method and a device for cooling from coils of metal bands by means of a water mist. The Device sees a nozzle on each side of the coil Creating a Nebcls ago. Again, the desired The aim of the lowest possible wetting and rusting achieved by a specific adjustment of the water mist.
Aufgabe der Erfindung ist es daher, ein Verfahren zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und einer Stirnseite eines Metallbands in Form eines gewickelten zylindrischen Coils, bereitzustellen, mit dem sich für Metallbänder unterschiedlicher Breiten ein möglichst hoher Wärmeübergang erreichen lässt.The object of the invention is therefore to provide a method for convective heat transfer between one Heat transfer means and a front side of a Metal bands in the form of a wound cylindrical coil, to provide with itself for metal bands different widths the highest possible heat transfer can achieve.
Aufgabe der Erfindung ist es ferner, eine Vorrichtung zur Durchführung des Verfahrens zur konvektiven Wärmeübertragung bereitzustellen.The object of the invention is also a device for Implementation of the method for convective heat transfer provide.
Erfindungsgemäß wird diese Aufgabe bei einem Wärmeübertragungsverfahren der eingangserwähnten Art, bei dem eine Stirnseite eines Metallbands in Form eines gewickelten Coils mittels wenigstens einer Düsenwand mit einem Wärmeübertragungsmittel beaufschlagt wird, dadurch gelöst, daß der Abstand zwischen wenigstens einer Düsenwand und der Stirnseite des Metallbandes eingestellt wird.According to the invention, this object is achieved in a heat transfer method of the type mentioned in which a Front side of a metal band in the form of a wound coil by means of at least one nozzle wall with a Heat transfer medium is applied, thereby solved that the distance between at least one nozzle wall and the end face of the Metal band is set.
Die Aufgabe wird ferner dadurch gelöst, dass in einer gattungsgemäßen Vorrichtung zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und einer Stirnseite eines Metallbands in Form eines gewickelten Coils Mittel zur Beaufschlagung der Stirnseiten des Coils mit dem Wärmeübertragungsmittel mittels wenigstens einer Düsenwand vorgesehen sind, wobei der Abstand zwischen wenigstens einer Düsenwand und der Stirnseite des Metallbandes einstellbar ist.The object is further achieved in that in one generic device for convective heat transfer between a heat transfer medium and an end face a metal band in the form of a wound coil means for Impingement of the end faces of the coil with the Heat transfer means by means of at least one nozzle wall are provided, wherein the distance between at least one Adjustable nozzle wall and the front side of the metal strip is.
In einem besonders bevorzugten Ausführungsbeispiel der Erfindung wird als Wärmeübertragungsmittel ein Gas über einen Druckkasten in Düsenwände gefördert und strömt durch die Düsen auf die Stirnflächen des zu erwärmenden oder zu kühlenden Coils. Erfindungsgemäß kann der Abstand zwischen den Düsenwänden und den Stirnflächen des Coils so eingestellt werden, dass sich für unterschiedlich breite Metallbänder eine möglichst optimale Anströmung durch das Wärmeübertragungsmittel ergibt. Die Düsenwände sind dazu entlang einer Achse beweglich, die der Hauptachse der Coils entspricht oder im Wesentlichen parallel zu dieser verläuft. Dabei umfasst der Ausdruck "Im Wesentlichen" Winkel in der Größenordnung von 0 bis 10°. Sollen beispielsweise Coilzylinder mit geringeren Bandbreiten behandelt werden, lassen sich die Düsenwände entlang dieser Achse in Richtung der Stirnflächen des Coils bewegen. So kann der Abstand zwischen Düsenwand und Coiloberfläche auf eine optimale Distanz eingestellt werden, und es wird stets eine wirkungsvolle Anströmung erreicht. In a particularly preferred embodiment of the Invention is a gas as a heat transfer medium promoted a pressure box in the nozzle walls and flows through the nozzles on the faces of the heated or to cooling coils. According to the invention, the distance between the nozzle walls and the end faces of the coil so be set that varies for different widths Metallbänder a best possible flow through the Heat transfer agent results. The nozzle walls are to Moveable along an axis that is the main axis of the coils corresponds or substantially parallel to this runs. Here, the term "substantially" includes angles in the Order of magnitude of 0 to 10 °. For example Coil cylinders are treated with smaller bandwidths, let the nozzle walls along this axis in the direction move the end faces of the coil. So can the distance between nozzle wall and coil surface to an optimal Distance will be set, and it will always be one achieved effective flow.
Im speziellen Fall sehr schmaler Coils kann ein zusätzlicher nachrüstbarer Düsenkasten vorgesehen werden, der den Nutzraum des Ofens teilt. Dann können zwei Coils in den Nutzraum eingebracht und beidseitig beaufschlagt werden.In the special case of very narrow coils can be an additional retrofittable nozzle box are provided, the Useable space of the oven shares. Then two coils in the Workspace introduced and applied to both sides.
Weitere Vorteile, Besonderheiten und zweckmäßige Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Darstellung eines bevorzugten Ausführungsbeispiels anhand der Abbildungen.Further advantages, special features and functional Further developments of the invention will become apparent from the Subclaims and the following description of a preferred embodiment with reference to the figures.
Von den Abbildungen zeigt:
- Fig. 1
- einen Schnitt durch ein besonders bevorzugtes Ausführungsbeispiel einer Vorrichtung zur konvektiven Wärmeübertragung von einem Wärmeübertragungsmittel auf gewickelte Metallbänder; und
- Fig. 2
- ein Ausführungsbeispiel eines Kammerofens mit integrierter erfindungsgemäßer Vorrichtung.
- Fig. 1
- a section through a particularly preferred embodiment of a device for convective heat transfer from a heat transfer medium to wound metal bands; and
- Fig. 2
- an embodiment of a chamber furnace with integrated device according to the invention.
In der Abbildung in Fig. 1 ist ein Schnitt durch ein besonders bevorzugtes Ausführungsbeispiel einer Vorrichtung zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und einer Stirnfläche eines gewickelten Metallband in Form eines zylindrischen Coils, dargestellt. Als Wärmeübertragungsmittel kann ein Fluid oder ein Gas zur Anwendung kommen. In diesem Ausführungsbeispiel wird zur Wärmeübertragung ein Gas verwendet.In the figure in Fig. 1 is a section through a particularly preferred embodiment of a device for convective heat transfer between a Heat transfer means and an end face of a wound metal strip in the form of a cylindrical coil, shown. As a heat transfer medium, a fluid or a gas is used. In this embodiment a gas is used to transfer heat.
Die Vorrichtung umfasst einen Druckkasten 20, in den das zu
erwärmende oder zu kühlende Coil 30 eingebracht wird. Bei
dem Coil handelt es sich um ein zylindrisch gewickeltes
Metallband. Das dargestellte Metallband ist um eine Achse 70
gewickelt, die in der Abbildung waagerecht verläuft, so dass
sich an den Stirnseiten 31 und 32 des Coils plane
Oberflächen ergeben. Im Wesentlichen parallel zu diesen
Stirnseiten des Coils befindet sich jeweils eine Düsenwand
10 und 11.The device comprises a
Das Gas zur Erwärmung oder Abkühlung der Coils kann
beispielsweise mittels eines nicht dargestellten Ventilators
in den Druckkasten 20 eingebracht werden. Bei dem Gas kann
es sich um verschiedene Gasarten handeln, die sich für den
jeweiligen Anwendungszweck eignen. Beispielsweise kann N2,
N2H2, Luft, Wasserdampf, Schutzgas, Wasserstoff, Exogas,
oder Endogas verwendet werden. Die Strömung des Gases
innerhalb des Druckkastens ist zeichnerisch durch Pfeile
gekennzeichnet. Das Gas strömt durch die Düsenwände 10 und
11 auf jeweils eine Stirnseite des Coils. Die Düsenwände
weisen dazu mehrere Öffnungen auf, die verschieden
ausgeformt sein können. Es können beispielsweise Loch-,
Schlitz-, Rohr- oder Dralldüsen Verwendung finden. Das Gas
strömt aus den Düsenöffnungen und prallt auf die Stirnseiten
des Coils, wo der Wärmeübergang stattfindet. Dies gilt
sowohl für die Erwärmung als auch für die Abkühlung des
Coilmaterials.The gas for heating or cooling of the coils, for example, by means of a fan, not shown, are introduced into the
Um die Einrichtung auf die Abmessungen verschiedener Coils
einstellen zu können, ist wenigstens eine der Düsenwände 10
und 11 beweglich entlang einer Achse ausgeführt, welche der
Hauptachse des Coils entspricht oder im Wesentlichen
parallel zu dieser verläuft. Durch diese bewegliche
Ausführung lässt sich der Abstand 60 zwischen Düsenwänden
und stirnflächen des Coils auf die optimale Distanz für eine
wirkungsvolle Anströmung einstellen. Der Antrieb 40 für
diese Bewegung ist in Fig. 1 nicht im Detail dargestellt,
sondern durch waagerechte Bewegungspfeile gekennzeichnet.To the device on the dimensions of different coils
to be able to adjust is at least one of the nozzle walls 10th
and 11 movably along an axis, which is the
Major axis of the coil corresponds or substantially
runs parallel to this. Through this mobile
Execution can be the
In der Abbildung in Fig. 1 sind auf der rechten Seite des
Coils zwei Positionen der Düsenwand 11 mit zwei
verschiedenen Abständen 60 dargestellt. Die Position mit dem
größeren Abstand ist durch eine gestrichelte Umrandung
dargestellt. Es ist ausreichend, wenn sich nur eine der
Düsenwände entlang der Hauptachse des Coils bewegen lässt,
es können jedoch auch beide Düsenwände beweglich ausgeführt
sein. Ist lediglich eine Düsenwand beweglich, muss eine
zusätzliche Positionierung des Coils in der Mitte zwischen
den Düsenwänden erfolgen. Sind dagegen beide Düsenwände
beweglich, können die Wände auf die optimale Distanz zu den
Stirnseiten des Coils gebracht werden.In the illustration in Fig. 1 are on the right side of the
Coils two positions of the
Sollen nun beispielsweise kleinere Coils erwärmt oder
abgekühlt werden, kann der Abstand 60 so weit optimiert
werden, dass sich ohne Leistungsverluste ein sehr guter
Wärmeübergang einstellt. In herkömmlichen Einrichtungen zur
konvektiven Wärmeübertragung ist dies nicht möglich, was bei
unterschiedlichen Coilgrößen zu einer Durchsatzreduzierung
der Anlage führt. Die Einrichtungen sind herkömmlicherweise
auf eine maximale Coilgröße ausgelegt und das Einbringen
kleinerer Coils führt zu einer Anströmung, deren Wirkung
unterhalb der maximal erreichbaren liegt.If, for example, smaller coils are heated or
can be cooled, the
Um trotz beweglicher Düsenwände die Dichtigkeit zwischen Düsenwänden und Druckkasten zu gewährleisten, kann die Dichtung auf verschiedene Weisen den Anforderungen angepasst werden. Beispielsweise kann der Dichtungsspalt gering oder die Dichtung als Labyrinth- oder Kontaktdichtung ausgeführt werden.In spite of moving nozzle walls, the tightness between To ensure nozzle walls and pressure box, the Gasket adapted to requirements in various ways become. For example, the sealing gap may be low or the seal designed as a labyrinth or contact seal become.
In der Abbildung in Fig. 2 ist ein besonders bevorzugtes
Ausführungsbeispiel eines Kammerofens mit integrierter
erfindungemäßer Vorrichtung zur Wärmeübertragung
dargestellt. Der Druckkasten 20 befindet sich innerhalb des
Ofens und ein zu erwärmendes oder zu kühlendes Coil 30 ist
zwischen den beiden Düsenwänden 10 und 11 positioniert. Die
Beschickung des Ofens mit einem Coil erfolgt in diesem
Ausführungsbeispiel von unten, was zeichnerisch unterhalb
der Kammer des Ofens durch gestrichelte Linien dargestellt
ist.In the illustration in Fig. 2 is a particularly preferred
Embodiment of a chamber furnace with integrated
erfindungemäßer device for heat transfer
shown. The
Im speziellen Fall von Coils mit sehr geringen Breiten kann der Nutzraum des Ofens mittels wenigstens eines nachrüstbaren Düsenkastens geteilt werden. So können zwei oder mehr Coils in den Nutzraum eingebracht und beidseitig beaufschlagt werden. Ein solcher zusätzlicher Düsenkasten ist in den Figuren 1 und 2 nicht dargestellt.In the special case of coils with very small widths can the working space of the furnace by means of at least one retrofittable nozzle box to be shared. So can two or more coils introduced into the work space and both sides be charged. Such an additional nozzle box is not shown in Figures 1 and 2.
Die Steuerung des Kammerofens erfolgt vorzugsweise über Steuermittel mit einem Programm, das zweckmäßigerweise wenigstens die Temperatur und die Geschwindigkeit des Wärmeübertragungsmittels und den Abstand zwischen Düsenwänden und Coil so steuert und regelt, dass sich ein möglichst optimaler Wärmeübergang einstellt.The control of the chamber furnace is preferably via Control means with a program that expediently at least the temperature and the speed of the Heat transfer medium and the distance between Nozzle walls and coil controls and regulates that as optimal as possible heat transfer sets.
Die erfindungsgemäße Ausführung einer Vorrichtung mit Düsenwänden, deren Abstand zu den Stirnflächen des zu erwärmenden oder zu kühlenden Coils einstellbar ist, weist verschiedene Vorteile auf. Die Einrichtung kann so auf die jeweiligen Coilabmessungen eingestellt werden, dass immer eine wirkungsvolle Anströmung gewährleistet ist. Daraus resultiert ein besserer Wärmeübergang als in herkömmlichen Anlagen, wodurch die Verweilzeit der Werkstücke in den Öfen gesenkt werden kann. Dies ermöglicht wiederum Energieeinsparungen und eine Verkürzung der Durchlaufzeiten. Der Einbau eines Trenndüsenkastens verbessert den Nutzungsgrad der Anlage zusätzlich. The inventive embodiment of a device with Nozzle walls whose distance to the end faces of the is adjustable to heating or cooling coils, has different advantages. The decor can be so on the respective coil dimensions are adjusted that always an effective flow is guaranteed. from that results in a better heat transfer than in conventional Facilities, reducing the residence time of the workpieces in the ovens can be lowered. This in turn allows Energy savings and a reduction in throughput times. The installation of a separating nozzle box improves the Utilization of the plant additionally.
- 10, 1110, 11
- Düsenwändenozzle walls
- 2020
- Druckkastenprint case
- 3030
- Coilcoil
- 31, 3231, 32
- Stirnflächen des CoilsEnd faces of the coil
- 4040
- Antriebdrive
- 6060
- Abstand zwischen Düsenwand und Stirnfläche des CoilsDistance between nozzle wall and face of the coils
- 7070
- Hauptachse des CoilsMain axis of the coil
- 7171
- Rotationsachse der DüsenwändeRotation axis of the nozzle walls
Claims (11)
- A method for convective heat transfer between a heat transfer medium and the face of a wound metal tape in the form of a coil, in which the face is exposed to the heat transfer medium using at least one die wall, characterized in that the distance (60) between at least one die wall (10; 11) and the face of the wound metal tape is adjusted.
- A device for convective heat transfer between a heat transfer medium and a face of a wound metal tape in the form of a coil, whereby the device has means for exposing the face to the heat transfer medium using at least one die wall, characterized in that the distance (60) between at least one die wall (10; 11) and the face of the wound metal tape is adjustable.
- The device according to Claim 2, characterized in that at least one of the die walls (10; 11) can be moved along an axis (71), whereby this axis corresponds to the main axis (70) of the coil (30) or runs essentially parallel thereto.
- The device according to one or both of Claims 2 and 3, characterized in that the heat transfer medium is a fluid or a gas.
- The device according to one or more of Claims 2 to 4, characterized in that the device comprises at least one pressure box (20) containing at least one coil (30) and two die walls (10; 11), whereby the die walls are arranged on the faces (31; 32) of the coil (30).
- The device according to Claim 5, characterized in that a heat transfer medium can be fed through the pressure box (20) and the die walls (10; 11) onto the faces (31; 32) of the coil (30).
- The device according to Claim 6, characterized in that a ventilator blows a gas into and/or through the pressure box (20).
- The device according to one or more of Claims 5 to 7, characterized in that the seal between the die walls (10; 11) and the pressure box (20) is configured as a labyrinth seal or contact seal.
- The device according to one or more of Claims 2 to 8, characterized in that the device has control means that control at least the temperature and the speed of the heat transfer medium as well as the distance (60) between the die walls and the coil (30).
- The device according to Claim 9, characterized in that the control means encompasses a control and regulation program that controls at least the temperature and the speed of the heat transfer medium as well as the distance (60) between the die walls and the coil (30).
- A kiln installation, characterized in that it has at least one device for convective heat transfer from a heat transfer medium to a surface, whereby the device is described by one or more of Claims 2 to 10.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10211749 | 2002-03-15 | ||
| DE10211749 | 2002-03-15 | ||
| DE10227498A DE10227498B4 (en) | 2002-03-15 | 2002-06-19 | Method and device for convective heat transfer between a heat transfer medium and the end face of a wound metal strip in the form of a coil |
| DE10227498 | 2002-06-19 | ||
| PCT/DE2003/000865 WO2003078666A2 (en) | 2002-03-15 | 2003-03-17 | Method and device for convective heat transfer between a heat transfer medium and the front face of a wound metal strip in the form of a coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1488014A2 EP1488014A2 (en) | 2004-12-22 |
| EP1488014B1 true EP1488014B1 (en) | 2005-07-27 |
Family
ID=28042844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03717151A Expired - Lifetime EP1488014B1 (en) | 2002-03-15 | 2003-03-17 | Method and device for convective heat transfer between a heat transfer medium and the front face of a wound metal strip in the form of a coil |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1488014B1 (en) |
| AT (1) | ATE300621T1 (en) |
| AU (1) | AU2003221602A1 (en) |
| WO (1) | WO2003078666A2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177240A (en) * | 1992-01-07 | 1993-07-20 | Nippon Steel Corp | Method for cooling hot rolled coil |
| JP3370562B2 (en) * | 1997-03-31 | 2003-01-27 | 川崎製鉄株式会社 | Method and apparatus for cooling hot-rolled coil |
-
2003
- 2003-03-17 WO PCT/DE2003/000865 patent/WO2003078666A2/en not_active Application Discontinuation
- 2003-03-17 EP EP03717151A patent/EP1488014B1/en not_active Expired - Lifetime
- 2003-03-17 AT AT03717151T patent/ATE300621T1/en active
- 2003-03-17 AU AU2003221602A patent/AU2003221602A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1488014A2 (en) | 2004-12-22 |
| WO2003078666A3 (en) | 2003-12-18 |
| WO2003078666A2 (en) | 2003-09-25 |
| AU2003221602A1 (en) | 2003-09-29 |
| AU2003221602A8 (en) | 2003-09-29 |
| ATE300621T1 (en) | 2005-08-15 |
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