EP1462529A1 - Bell type furnace, especially for strip or coiled wire - Google Patents

Bell type furnace, especially for strip or coiled wire Download PDF

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Publication number
EP1462529A1
EP1462529A1 EP04450059A EP04450059A EP1462529A1 EP 1462529 A1 EP1462529 A1 EP 1462529A1 EP 04450059 A EP04450059 A EP 04450059A EP 04450059 A EP04450059 A EP 04450059A EP 1462529 A1 EP1462529 A1 EP 1462529A1
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EP
European Patent Office
Prior art keywords
annular
heat exchanger
protective hood
gas
directing mechanism
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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
EP04450059A
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German (de)
French (fr)
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EP1462529B1 (en
Inventor
Peter Dipl.-Ing. Ebner
Heribert Dipl.-Ing. Lochner
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Ebner Industrieofenbau GmbH
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Ebner Industrieofenbau GmbH
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Publication of EP1462529A1 publication Critical patent/EP1462529A1/en
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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
    • C21D9/667—Multi-station furnaces
    • C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
    • 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

Definitions

  • both the heat treatment and the necessary Subsequent cooling under protective gas mostly nitrogen or hydrogen or a mixture of these gases.
  • protective gas mostly nitrogen or hydrogen or a mixture of these gases.
  • This is used to cool the annealing material Shielding gas extracted from the protective hood via a central radial fan passed for cooling via a heat exchanger before it is returned to the Protective hood flows.
  • protective gas mostly nitrogen or hydrogen or a mixture of these gases.
  • Flow channels are axially adjustable slides mounted in the pressure side Flow path of the radial fan can be advanced to the gas flow sucked in from the protective hood via the cooling chamber conduct that through an outer annular gap between the diffuser of the radial fan and the protective hood with the protective hood in flow connection stands.
  • the flow channels are closed, so that the axially sucked inert gas over the impeller of the Radial blower passed through the diffuser in the circuit in the protective hood becomes.
  • the slides are raised, which is the Deflection of the protective gas down to the cooling chamber results.
  • the invention is therefore based on the object, a bell annealer of the type described at the beginning with simple constructive means such that advantageous protective gas cooling can be achieved without entering the Need to intervene sustainably in the construction of the glow socket.
  • the invention solves this problem in that the protective hood Is mounted gas-tight over an annular flange that the heat exchanger below of the ring flange is that the flow channel from one of the outer circumference of the diffuser, concentric to the annular gap annular channel and that the deflecting device, as the outside of the diffuser, annular deflection slide is formed.
  • the deflection device that cools Deflects shielding gas into the ring channel leading to the heat exchanger Exit side of the nozzle is assigned what advantageous flow conditions for the gas flow to be deflected, especially since the deflection slide encloses the guide apparatus continuously.
  • the one from the outer circumference of the diffuser, designed as an annular channel also represents an advantageous prerequisite for a heat exchanger arrangement in the form of a ring surrounding the glow plug, which is a simple sealing of the protective hood via an annular flange enables without in to have to take special cooling measures in this area.
  • the one below the heat exchanger arranged on the ring flange of the protective hood ensures the cooled shielding gas for appropriate cooling in this area.
  • annular channel and the annular gap from each other through a cylindrical wall be separated, which is axially displaceably mounted and the annular Deflection slide carries. Because the cylindrical wall for adjusting the annular Deflection valve is used, otherwise necessary drive connections are omitted between the actuator and the deflection slide.
  • the bell annealer has a glow socket 1, in which a radial fan 2 is mounted, the Impeller 3 is driven by a motor 4.
  • the impeller 3 is from one Guide apparatus 5 enclosed, the guide vanes are designated 6.
  • the annealing material 7 resting on the glow base 1, which is only indicated by broken lines is covered by a protective hood 8, which has an annular flange 9 is supported by a circumferential seal 10 for a gas-tight Completion of the protective hood 8 ensures.
  • the glow socket 1 surrounded by a heat exchanger 11, which in on the outflow side an annular gap 12 between the protective hood 8 and the diffuser 5 opens.
  • the heat exchanger 11 connects to a flow channel 13 which is designed as an annular channel 14 concentric with the annular gap 12.
  • the Separation between the ring channel 14 and the annular gap 12 is carried out by a cylindrical wall 15 which is axially displaceable and with an actuator 16 is connected via lifting rods 17.
  • the wall 15 carries one on the outside Guide device 5 connecting deflector in the form of a guide device 5 enclosing, annular deflection slide 18, which either the gas flow 1 in the protective hood 8 releases, as this by the Flow arrow 19 is indicated, or the gas flow according to FIG. 2 deflected into the ring channel 14. Due to the wedge-shaped cross section of the Deflection slide 18 can also be used in intermediate positions, what a temperature control of the protective gas in the protective hood 8th allowed.
  • the deflection slide 18 advantageously fits into the gained Space, which brings a radially compact design with it.
  • the deflection slide is used to cool the protective gas in the protective hood 8 18 from the lowered position shown in FIG. 1 in the 2 raised to a corresponding gas flow over to cool the annular channel 14 through the heat exchanger 11 and via the Feed the annular gap 12 back to the protective hood 8.
  • the cooling of the protective gas in the area below the ring flange 9 brings a cooling of the Protective hood with the ring flange 9 in this area, what else necessary separate cooling measures are unnecessary.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)

Abstract

Furnace contains annealing base for location of annealed product, protecting cap, gasproof installed over annular flange, located in base centrifugal blower with impeller, directing mechanism with blades for circulation of protective gas in protecting cap, located under annular flange heat exchanger for cooling of protective gas, which from the side of inlet is connected through flow passage to thrust face of centrifugal blower, and from the side of inlet it falls into annular clearance between directing mechanism and protecting cap, and transferred axially deflecting device, located from thrust face of centrifugal blower for selective conjunction of directing mechanism to heat exchanger flowing channel to centrifugal blower, at that between directing mechanism and protecting cap it is cylindrical wall, separating external annular clearance from concentric to it internal annular channel, forming flow passage between cylindrical wall and external perimeter of directing mechanism, cylindrical wall bears deflecting device, which is implemented in the form of annular deflecting gate enveloping on the outside directing mechanism.

Description

Die Erfindung bezieht sich auf einen Haubenglühofen, insbesondere für Stahlband- oder Drahtbunde, mit einem das Glühgut aufnehmenden Glühsokkel, mit einer gasdicht aufgesetzten Schutzhaube, mit einem im Glühsockel gelagerten Radialgebläse, das ein Laufrad und einen das Laufrad umschließenden Leitapparat zur Umwälzung eines Schutzgases in der Schutzhaube umfaßt, mit einem Wärmetauscher zum Kühlen des Schutzgases, der eingangsseitig über einen Strömungskanal an die Druckseite des Radialgebläses angeschlossen ist und ausgangsseitig in einen Ringspalt zwischen dem Leitapparat und der Schutzhaube mündet, und mit einer axial in den druckseitigen Strömungsweg des Radialgebläses verschiebbaren Umlenkeinrichtung zum wahlweisen Anschluß des zum Wärmetauscher führenden Strömungskanals an das Radialgebläse.The invention relates to a bell annealer, in particular for Steel strips or coils of wire, with a glow socket that receives the annealing material, with a gas-tight protective hood, with one in the glow socket mounted radial fan, the one impeller and one surrounding the impeller Guide device for circulating a protective gas in the protective hood comprises, with a heat exchanger for cooling the protective gas, the input side via a flow channel to the pressure side of the radial fan is connected and on the output side in an annular gap between the diffuser and the protective hood opens, and with one axially in the pressure side Flow path of the radial fan displaceable deflector optional connection of the flow channel leading to the heat exchanger the radial fan.

Bei der Wärmebehandlung von metallischem Glühgut, wie Stahlband- oder Drahtbunden, erfolgt sowohl die Wärmebehandlung als auch die notwendige nachfolgende Abkühlung unter Schutzgas, meist Stickstoff oder Wasserstoff bzw. ein Gemisch dieser Gase. Zur Abkühlung des Glühgutes wird das aus der Schutzhaube über ein zentrales Radialgebläse abgesaugte Schutzgas zur Kühlung über einen Wärmetauscher geleitet, bevor es wieder in die Schutzhaube strömt. Zu diesem Zweck ist es bekannt (DE 2 228 215 A), unterhalb des das Glühgut aufnehmenden Glühsockels eine ringförmige Kühlkammer mit Kühlschlangen vorzusehen und diese Kühlkammer über axiale Strömungskanäle an die Druckseite des Radialgebläses anzubinden, und zwar zwischen dem Laufrad und dem Leitapparat dieses Radialgebläses. In den Strömungskanälen sind axial verstellbare Schieber gelagert, die in den druckseitigen Strömungsweg des Radialgebläses vorgeschoben werden können, um den aus der Schutzhaube angesaugten Gasstrom über die Kühlkammer zu leiten, die über einen äußeren Ringspalt zwischen dem Leitapparat des Radialgebläses und der Schutzhaube mit der Schutzhaube in Strömungsverbindung steht. In der abgesenkten Schieberstellung sind die Strömungskanäle geschlossen, so daß das axial angesaugte Schutzgas über das Laufrad des Radialgebläses durch den Leitapparat im Kreislauf in die Schutzhaube geleitet wird. Zum Kühlen des Schutzgases werden die Schieber angehoben, was die Umlenkung des Schutzgases nach unten zur Kühlkammer zur Folge hat. Da der Glühsockel nach unten durchbrochen werden muß, wirkt sich die Anordnung der axialen Strömungskanäle nachteilig auf die Tragfähigkeit des Glühsockels aus. Außerdem ergeben sich ungünstige Strömungsverhältnisse bei der Umlenkung des Schutzgases zur Kühlkammer, weil die Umschalteinrichtung im Bereich der höchsten Austrittsgeschwindigkeit des Schutzgases aus dem Laufrad vorgesehen werden muß.In the heat treatment of metallic annealing materials such as steel strip or wire bundles, both the heat treatment and the necessary Subsequent cooling under protective gas, mostly nitrogen or hydrogen or a mixture of these gases. This is used to cool the annealing material Shielding gas extracted from the protective hood via a central radial fan passed for cooling via a heat exchanger before it is returned to the Protective hood flows. For this purpose it is known (DE 2 228 215 A), below an annealing cooling chamber of the annealing base receiving the annealing material to provide with cooling coils and this cooling chamber via axial flow channels to connect to the pressure side of the radial fan, namely between the impeller and the diffuser of this radial fan. In the Flow channels are axially adjustable slides mounted in the pressure side Flow path of the radial fan can be advanced to the gas flow sucked in from the protective hood via the cooling chamber conduct that through an outer annular gap between the diffuser of the radial fan and the protective hood with the protective hood in flow connection stands. In the lowered slide position, the flow channels are closed, so that the axially sucked inert gas over the impeller of the Radial blower passed through the diffuser in the circuit in the protective hood becomes. To cool the inert gas, the slides are raised, which is the Deflection of the protective gas down to the cooling chamber results. There the glow socket must be broken down, the arrangement affects the axial flow channels adversely affect the load-bearing capacity of the glow socket out. In addition, there are unfavorable flow conditions the deflection of the protective gas to the cooling chamber, because the switching device in the area of the highest exit velocity of the protective gas the impeller must be provided.

Der Erfindung liegt somit die Aufgabe zugrunde, einen Haubenglühofen der eingangs geschilderten Art mit einfachen konstruktiven Mitteln so auszubilden, daß eine vorteilhafte Schutzgaskühlung erreicht werden kann, ohne in die Konstruktion des Glühsockels nachhaltig eingreifen zu müssen.The invention is therefore based on the object, a bell annealer of the type described at the beginning with simple constructive means such that advantageous protective gas cooling can be achieved without entering the Need to intervene sustainably in the construction of the glow socket.

Die Erfindung löst die gestellte Aufgabe dadurch, daß die Schutzhaube über einen Ringflansch gasdicht gelagert ist, daß der Wärmetauscher unterhalb des Ringflansches liegt, daß der Strömungskanal aus einem vom Außenumfang des Leitapparates ausgehenden, zum Ringspalt konzentrischen Ringkanal besteht und daß die Umlenkeinrichtung als den Leitapparat außen umschließender, ringförmiger Umlenkschieber ausgebildet ist.The invention solves this problem in that the protective hood Is mounted gas-tight over an annular flange that the heat exchanger below of the ring flange is that the flow channel from one of the outer circumference of the diffuser, concentric to the annular gap annular channel and that the deflecting device, as the outside of the diffuser, annular deflection slide is formed.

Zufolge der Verlegung des Strömungskanals in den äußeren Umfangsbereich des Glühsockels kann dieser im wesentlichen unverändert aufgebaut werden. Dazu kommt, daß die Umlenkeinrichtung, die das zu kühlende Schutzgas in den zum Wärmetauscher führenden Ringkanal umlenkt, der Austrittsseite des Leitapparates zugeordnet wird, was vorteilhafte Strömungsbedingungen für die umzulenkende Gasströmung ermöglicht, zumal der Umlenkschieber den Leitapparat durchgehend umschließt. Der vom Außenumfang des Leitapparates ausgehende, als Ringkanal ausgebildete Strömungskanal stellt außerdem eine vorteilhafte Voraussetzung für eine Wärmetauscheranordnung in Form eines den Glühsockel umschließenden Ringes dar, was eine einfache Dichtung der Schutzhaube über einen Ringflansch ermöglicht, ohne in diesem Bereich gesonderte Kühlmaßnahmen treffen zu müssen. Der unterhalb des Ringflansches der Schutzhaube angeordnete Wärmetauscher sorgt ja über das abgekühlte Schutzgas für eine entsprechende Kühlung in diesem Bereich.Due to the laying of the flow channel in the outer peripheral region the glow base can be constructed essentially unchanged become. In addition, the deflection device that cools Deflects shielding gas into the ring channel leading to the heat exchanger Exit side of the nozzle is assigned what advantageous flow conditions for the gas flow to be deflected, especially since the deflection slide encloses the guide apparatus continuously. The one from the outer circumference of the diffuser, designed as an annular channel also represents an advantageous prerequisite for a heat exchanger arrangement in the form of a ring surrounding the glow plug, which is a simple sealing of the protective hood via an annular flange enables without in to have to take special cooling measures in this area. The one below the heat exchanger arranged on the ring flange of the protective hood ensures the cooled shielding gas for appropriate cooling in this area.

Um besonders einfache Konstruktionsverhältnisse zu erhalten, kann der Ringkanal und der Ringspalt durch eine zylindrische Wand voneinander getrennt werden, die axial verschiebbar gelagert ist und den ringförmigen Umlenkschieber trägt. Da die zylindrische Wand zur Verstellung des ringförmigen Umlenkschiebers dient, entfallen sonst erforderliche Antriebsverbindungen zwischen dem Stelltrieb und dem Umlenkschieber.In order to obtain particularly simple design relationships, can the annular channel and the annular gap from each other through a cylindrical wall be separated, which is axially displaceably mounted and the annular Deflection slide carries. Because the cylindrical wall for adjusting the annular Deflection valve is used, otherwise necessary drive connections are omitted between the actuator and the deflection slide.

Weisen die Leitschaufeln des Leitapparates an ihren äußeren Stirnseiten Ausnehmungen für den Umlenkschieber auf, so ergibt sich in radialer Richtung eine gedrängte Bauweise, die eine unmittelbare Übernahme der Strömungsführung durch den Umlenkschieber erlaubt, und zwar bei einer entsprechenden Ausgestaltung des Umlenkschiebers sowohl gegen die Schutzhaube als auch zum Ringkanal hin.Assign the guide vanes of the guide apparatus on their outer end faces Recesses for the deflection slide, so there is in the radial direction a compact design, which takes over the direct flow control allowed by the deflecting slide, with a corresponding Design of the deflection slide against both the protective hood as well as towards the ring channel.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen:

Fig. 1
einen erfindungsgemäßen Haubenglühofen ausschnittsweise im Bereich des Glühsockels in einem schematischen Axialschnitt und
Fig. 2
diesen Glühofen im Bereich des Wärmetauschers ebenfalls in einem Axialschnitt, jedoch in einem größeren Maßstab.
The subject matter of the invention is shown in the drawing, for example. Show it:
Fig. 1
a hood annealing furnace according to the invention in sections in the region of the annealing base in a schematic axial section and
Fig. 2
this annealing furnace in the area of the heat exchanger also in an axial section, but on a larger scale.

Der Haubenglühofen gemäß dem dargestellten Ausführungsbeispiel weist einen Glühsockel 1 auf, in dem ein Radialgebläse 2 gelagert ist, dessen Laufrad 3 von einem Motor 4 angetrieben wird. Das Laufrad 3 ist von einem Leitapparat 5 umschlossen, dessen Leitschaufeln mit 6 bezeichnet sind. Das auf dem Glühsockel 1 aufruhende Glühgut 7, das lediglich strichpunktiert angedeutet ist, wird von einer Schutzhaube 8 abgedeckt, die über einen Ringflansch 9 abgestützt ist, der über eine umlaufende Dichtung 10 für einen gasdichten Abschluß der Schutzhaube 8 sorgt.The bell annealer according to the illustrated embodiment has a glow socket 1, in which a radial fan 2 is mounted, the Impeller 3 is driven by a motor 4. The impeller 3 is from one Guide apparatus 5 enclosed, the guide vanes are designated 6. The annealing material 7 resting on the glow base 1, which is only indicated by broken lines is covered by a protective hood 8, which has an annular flange 9 is supported by a circumferential seal 10 for a gas-tight Completion of the protective hood 8 ensures.

Unterhalb des Ringflansches 9 der Schutzhaube 8 wird der Glühsockel 1 von einem Wärmetauscher 11 umschlossen, der auf der Abströmseite in einen Ringspalt 12 zwischen der Schutzhaube 8 und dem Leitapparat 5 mündet. Zulaufseitig schließt der Wärmetauscher 11 an einen Strömungskanal 13 an, der als zum Ringspalt 12 konzentrischer Ringkanal 14 ausgebildet ist. Die Trennung zwischen dem Ringkanal 14 und dem Ringspalt 12 erfolgt durch eine zylindrische Wand 15 die axial verschiebbar gelagert und mit einem Stelltrieb 16 über Hubstangen 17 verbunden ist. Die Wand 15 trägt eine außen an den Leitapparat 5 anschließende Umlenkeinrichtung in Form eines den Leitapparat 5 umschließenden, ringförmigen Umlenkschiebers 18, der entweder die Gasströmung gemäß der Fig. 1 in die Schutzhaube 8 freigibt, wie dies durch den Strömungspfeil 19 angedeutet ist, oder die Gasströmung entsprechend der Fig. 2 in den Ringkanal 14 umlenkt. Aufgrund des keilförmigen Querschnitts des Umlenkschiebers 18 kann dieser auch in Zwischenstellungen eingesetzt werden, was eine Temperatursteuerung des Schutzgases in der Schutzhaube 8 erlaubt.Below the ring flange 9 of the protective hood 8 is the glow socket 1 surrounded by a heat exchanger 11, which in on the outflow side an annular gap 12 between the protective hood 8 and the diffuser 5 opens. On the inlet side, the heat exchanger 11 connects to a flow channel 13 which is designed as an annular channel 14 concentric with the annular gap 12. The Separation between the ring channel 14 and the annular gap 12 is carried out by a cylindrical wall 15 which is axially displaceable and with an actuator 16 is connected via lifting rods 17. The wall 15 carries one on the outside Guide device 5 connecting deflector in the form of a guide device 5 enclosing, annular deflection slide 18, which either the gas flow 1 in the protective hood 8 releases, as this by the Flow arrow 19 is indicated, or the gas flow according to FIG. 2 deflected into the ring channel 14. Due to the wedge-shaped cross section of the Deflection slide 18 can also be used in intermediate positions, what a temperature control of the protective gas in the protective hood 8th allowed.

Da die Leitschaufeln 6 des Leitapparates 5 an der äußeren Stirnseite an die Querschnittsform des Umlenkschiebers 18 angepaßte Ausnehmungen 20 aufweisen, fügt sich der Umlenkschieber 18 vorteilhaft in den gewonnen Raum ein, was eine radial gedrängte Bauweise mit sich bringt.Since the guide vanes 6 of the guide device 5 on the outer end face recesses adapted to the cross-sectional shape of the deflection slide 18 20 have, the deflection slide 18 advantageously fits into the gained Space, which brings a radially compact design with it.

Zum Kühlen des Schutzgases in der Schutzhaube 8 wird der Umlenkschieber 18 aus der in der Fig. 1 dargestellten abgesenkten Stellung in die Stellung nach der Fig. 2 angehoben, um einen entsprechenden Gasstrom über den Ringkanal 14 durch den Wärmetauscher 11 abzukühlen und über den Ringspalt 12 wieder der Schutzhaube 8 zuzuführen. Die Kühlung des Schutzgases im Bereich unterhalb des Ringflansches 9 bringt eine Kühlung der Schutzhaube mit dem Ringflansch 9 in diesem Bereich mit sich, was sonst erforderliche gesonderte Kühlmaßnahmen erübrigt.The deflection slide is used to cool the protective gas in the protective hood 8 18 from the lowered position shown in FIG. 1 in the 2 raised to a corresponding gas flow over to cool the annular channel 14 through the heat exchanger 11 and via the Feed the annular gap 12 back to the protective hood 8. The cooling of the protective gas in the area below the ring flange 9 brings a cooling of the Protective hood with the ring flange 9 in this area, what else necessary separate cooling measures are unnecessary.

Claims (3)

Haubenglühofen, insbesondere für Stahlband- oder Drahtbunde, mit einem das Glühgut aufnehmenden Glühsockel, mit einer gasdicht aufgesetzten Schutzhaube, mit einem im Glühsockel gelagerten Radialgebläse, das ein Laufrad und einen das Laufrad umschließenden Leitapparat zur Umwälzung eines Schutzgases in der Schutzhaube umfaßt, mit einem Wärmetauscher zum Kühlen des Schutzgases, der eingangsseitig über einen Strömungskanal an die Druckseite des Radialgebläses angeschlossen ist und ausgangsseitig in einen Ringspalt zwischen dem Leitapparat und der Schutzhaube mündet, und mit einer axial in den druckseitigen Strömungsweg des Radialgebläses verschiebbaren Umlenkeinrichtung zum wahlweisen Anschluß des zum Wärmetauscher führenden Strömungskanals an das Radialgebläse, dadurch gekennzeichnet, daß die Schutzhaube (8) über einen Ringflansch (9) gasdicht gelagert ist, daß der Wärmetauscher (11) unterhalb des Ringflansches (9) liegt, daß der Strömungskanal (13) aus einem vom Außenumfang des Leitapparates (5) ausgehenden, zum Ringspalt (12) konzentrischen Ringkanal (14) besteht und daß die Umlenkeinrichtung als den Leitapparat (5) außen umschließender, ringförmiger Umlenkschieber (18) ausgebildet ist.Bell annealing furnace, in particular for steel strip or wire coils, with a glow base receiving the material to be annealed, with a gas-tight protective hood, with a radial fan mounted in the glow base, which comprises an impeller and a guide device surrounding the impeller for circulating a protective gas in the protective hood, with a heat exchanger for cooling the protective gas, which is connected on the input side via a flow channel to the pressure side of the radial fan and on the output side opens into an annular gap between the guide apparatus and the protective hood, and with a deflection device which can be moved axially into the pressure side flow path of the radial fan for optional connection of the flow channel leading to the heat exchanger to the radial fan, characterized in that the protective hood (8) is mounted in a gas-tight manner via an annular flange (9), that the heat exchanger (11) lies below the annular flange (9), that the flow channel (13) consists of one there is an annular channel (14) extending from the outer circumference of the diffuser (5) and concentric to the annular gap (12) and that the deflecting device is designed as an annular deflecting slide (18) which surrounds the diffuser (5) on the outside. Haubenglühofen nach Anspruch 1, dadurch gekennzeichnet, daß der Ringkanal (14) und der Ringspalt (12) durch eine zylindrische Wand (15) voneinander getrennt sind, die axial verschiebbar gelagert ist und den ringförmigen Umlenkschieber (18) trägt.Bell annealing furnace according to claim 1, characterized in that the annular channel (14) and the annular gap (12) are separated from each other by a cylindrical wall (15) which is axially displaceably mounted and carries the annular deflection slide (18). Haubenglühofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Leitschaufe!n (6) des Leitapparates (5) an ihrer äußeren Stirnseite Ausnehmungen (20) für den Umlenkschieber (18) aufweisen.Bell-type annealing furnace according to claim 1 or 2, characterized in that the guide vanes (6) of the guide apparatus (5) have recesses (20) for the deflection slide (18) on their outer end face.
EP04450059A 2003-03-24 2004-03-12 Bell type furnace, especially for strip or coiled wire Expired - Lifetime EP1462529B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4612003 2003-03-24
AT0046103A AT411904B (en) 2003-03-24 2003-03-24 Batch-type annealing furnace for annealing steel strip or wire bundles has a protective hood positioned over an annular flange in a gas-tight manner with a heat exchanger lying above the flange

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EP1462529A1 true EP1462529A1 (en) 2004-09-29
EP1462529B1 EP1462529B1 (en) 2007-10-17

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US (1) US7252798B2 (en)
EP (1) EP1462529B1 (en)
JP (1) JP4504057B2 (en)
KR (1) KR101016527B1 (en)
AT (2) AT411904B (en)
BR (1) BRPI0400753B1 (en)
CA (1) CA2461857C (en)
DE (1) DE502004005234D1 (en)
ES (1) ES2295811T3 (en)
MX (1) MXPA04002738A (en)
PL (1) PL202448B1 (en)
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US7959172B2 (en) * 2008-05-02 2011-06-14 Michael Nashawaty Push-in-bung assembly and suspension system using same
AT507671B1 (en) * 2009-03-13 2010-07-15 Ebner Ind Ofenbau HIGH-TEMPERATURE PISTON FOR GLOWING TREATMENT OF TINS
AT507423B1 (en) * 2009-03-25 2010-05-15 Ebner Ind Ofenbau PROCESS FOR PREHEATING GLOWING IN A BROWN GLOW SYSTEM
DE102011088634B4 (en) † 2011-12-14 2014-07-31 Ebner Industrieofenbau Gmbh Closed transport fluid system for internal furnace heat exchange between mulled gases
DE102011088633A1 (en) * 2011-12-14 2013-06-20 Ebner Industrieofenbau Gmbh Hood furnace with positioned within a protective hood heat dissipation device, in particular fed by an oven-external energy source, for discharging heat to annealing gas
EP3222734A1 (en) * 2016-03-23 2017-09-27 Voestalpine Stahl GmbH Method for temperature treating a manganese steel interim product and steel interim product put through corresponding temperature treatment
CN109579546B (en) * 2018-11-29 2021-01-12 湖南顶立科技有限公司 Two-stage cooling furnace
CN109439875B (en) * 2018-12-07 2021-01-12 湖南顶立科技有限公司 Flow guide plate and bell-type furnace
CN116479229A (en) * 2023-03-31 2023-07-25 江苏贯森新材料科技有限公司 Annealing device for ultrathin precise soft stainless steel band

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DE2228215A1 (en) * 1971-12-29 1973-07-12 Guinea Hermanos Ingenieros Sa Bell type heat treatment furnace - with atmosphere cooling chamber
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EP0790320A1 (en) * 1996-02-13 1997-08-20 Peter Helmut Dipl.-Ing. Ebner Bell type furnace

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GB455089A (en) * 1935-04-09 1936-10-09 Birmingham Electr Furnaces Ltd Improvements in, or relating to, furnaces or apparatus for use in the heat-treatment of metals
DE2228215A1 (en) * 1971-12-29 1973-07-12 Guinea Hermanos Ingenieros Sa Bell type heat treatment furnace - with atmosphere cooling chamber
US4846675A (en) * 1987-06-01 1989-07-11 Worthington Industries, Inc. Annealing furnace
US5340091A (en) * 1993-04-21 1994-08-23 Gas Research Institute Batch coil annealing furnace
EP0790320A1 (en) * 1996-02-13 1997-08-20 Peter Helmut Dipl.-Ing. Ebner Bell type furnace

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RU2004108665A (en) 2005-09-10
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DE502004005234D1 (en) 2007-11-29
PL202448B1 (en) 2009-06-30
TW200510549A (en) 2005-03-16
UA81748C2 (en) 2008-02-11
CA2461857A1 (en) 2004-09-24
AT411904B (en) 2004-07-26
JP2004285478A (en) 2004-10-14
ATE376071T1 (en) 2007-11-15
BRPI0400753B1 (en) 2013-07-23
MXPA04002738A (en) 2005-04-25
US7252798B2 (en) 2007-08-07
ZA200402278B (en) 2004-09-28
ES2295811T3 (en) 2008-04-16
TWI316552B (en) 2009-11-01
ATA4612003A (en) 2003-12-15
KR101016527B1 (en) 2011-02-24
CA2461857C (en) 2011-06-28
US20040217527A1 (en) 2004-11-04
BRPI0400753A (en) 2005-01-11
JP4504057B2 (en) 2010-07-14
EP1462529B1 (en) 2007-10-17
PL366506A1 (en) 2004-10-04

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