EP2304318B1 - Radiant heating arrangement in which distortions are compensated - Google Patents

Radiant heating arrangement in which distortions are compensated Download PDF

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Publication number
EP2304318B1
EP2304318B1 EP09772190.6A EP09772190A EP2304318B1 EP 2304318 B1 EP2304318 B1 EP 2304318B1 EP 09772190 A EP09772190 A EP 09772190A EP 2304318 B1 EP2304318 B1 EP 2304318B1
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EP
European Patent Office
Prior art keywords
radiant heating
heating tube
tube according
mount
central portion
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EP09772190.6A
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German (de)
French (fr)
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EP2304318A2 (en
Inventor
Joachim A. WÜNNING
Joachim G. WÜNNING
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WS Warmeprozesstechnik GmbH
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WS Warmeprozesstechnik GmbH
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Publication of EP2304318A2 publication Critical patent/EP2304318A2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/64—Heating elements specially adapted for furnaces using ribbon, rod, or wire heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D99/0035—Heating indirectly through a radiant surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03009—Elongated tube-shaped combustion chambers

Definitions

  • the invention relates to a Strahlungs carvingrohr, which is also referred to briefly as a jet pipe.
  • Radiant heating pipes are in use for heating furnace chambers, which are heated internally by a suitable heat source, for example a burner, and are thereby heated.
  • a suitable heat source for example a burner
  • a furnace chamber located Good is heated mainly by the heat radiation emanating from the Strahlungs carvingrohr.
  • radiant heating tubes are in use with several arms or branches, which have a considerable weight overall.
  • One end of the radiant heating tube extends through a furnace wall. Outside, usually a burner is flanged. In order to absorb the considerable weight of the Strahlungssammlungrohrs, this is often additionally supported at its opposite closed end on the opposite furnace wall. A corresponding support is usually taken in a sliding bearing so that the Strahlungssammlungrohr can extend in operation in the longitudinal direction.
  • the radiant heating tube according to the invention has a tubular body with a preferably straight-shaped middle section and two return sections arranged next to the central section. These form with the center section loops in which, for example, a gas recirculation flow can form.
  • Strahlungssammlungrohre have a large radiating surface. On the other hand, they are relatively stiff and heavy.
  • the radiant heating tube is therefore preferably supported at both ends. At one end it is supported on a sliding bearing, which can compensate for an axial extension of the radiant heating tube.
  • the sliding bearing also allows a certain pivoting movement of the Strahlungssammlungrohres.
  • the radiant heating tube is gripped by a pivot bearing which allows pivotal movement of the radiant heating tube about at least one axis.
  • the joint bearing preferably does not permit axial movement of the radiant heating tube, but fixes it with respect to the axial direction.
  • the sliding bearing and the spherical plain bearing are preferably arranged on different, opposing furnace walls, between which the Strahlungssammlungrohr is arranged and against which the Strahlungssammlungrohr supported.
  • the storage of Strahlungssammlungrohrs compensate for both the thermally induced change in length of the Strahlungssammlungntzs and thermally or aging-related movements of the furnace walls against each other.
  • the two furnace walls may possibly shift slightly in parallel to each other.
  • the two bearings of the Strahlungssammlungrohres both allow a certain pivoting movement, keep the Strahlungssammlungrohr substantially free of force and avoid the entry of stresses in the Strahlungssammlungrohr. Also, a lateral deflection of the Strahlungssammlungrohrs be compensated if this should occur for thermal or other reasons. This applies both to ceramic radiant heat pipes, and in particular also to radiant heating pipes made of sheet steel.
  • the hinge bearing defines a pivot axis which is transverse to the Strahlungssammlungrohr.
  • the pivot axis may be eccentric, e.g. be set at the edge of Strahlungssammlungrohres.
  • the associated hinge bearing is disposed outside the furnace space in the vicinity of the furnace wall. For example, it is positioned between the burner and the furnace wall.
  • the hinge axis of the pivot bearing is preferably oriented horizontally.
  • the captured in the sliding bearing end of Strahlungssammlungrohrs can be raised or lowered slightly without harmful forces on the Radiation heating pipe act.
  • the joint bearing in such a way that the radiant heating tube can pivot slightly laterally. It pivots about a vertical pivot axis. Thus, no deformation of the furnace walls exerts any significant forces on the radiant heating tube.
  • the joint bearing may be formed by a holder with an upwardly open receptacle in which a flange of the Strahlungssammlungrohrs lies.
  • the receptacle fixes the flange in the vertical direction and in the axial direction, but allows pivoting of the flange by a few degrees both about a horizontal axis, as well as about a vertical axis.
  • a compensator is arranged between the bearing on the spherical bearing end of Strahlungssammlungrohrs or the flange and the furnace wall, which closes off the furnace chamber gas-tight to the flange without firmly clamp the end of the Strahlungssammlungrohrs.
  • the compensator may be attached to a radiant heatbox box that sits in the furnace wall.
  • the Strahlungs2020rohrkasten closes a provided in the furnace wall opening through which the Strahlungs2020 can be introduced into the furnace chamber.
  • the compensator is formed for example by a corrugated thin-walled sheet metal sleeve, one end of which is connected to the jet pipe and the other end to the furnace wall or an insert which is in an opening of the furnace wall sitting.
  • the compensator can be arranged on the outside of the furnace wall, ie outside the furnace chamber or, if necessary, also inside thereof.
  • a furnace chamber 1 is illustrated, which is bounded by two furnace space walls 2, 3.
  • the furnace chamber 1 may be an elongate channel or tunnel through which radiant heat pipes 4, 5, which are preferably of the same design and arranged in a row, extend. They serve to heat the oven space and in particular the heating of the corresponding material to be treated, for example, a metal strip, which is guided longitudinally through the furnace chamber.
  • the Strahlungs2020ecke 4, 5, each mounted on two furnace walls 2, 3, as in the example of the radiant heater 5 from Fig. 2 can be seen. It is preferably made of sheet steel and has a tubular, preferably straight middle section 6 and return sections 7, 8, which each form loops 9, 10 with the central section 6.
  • Such Strahlungs2020rohre 4, 5, be also referred to as "double P-RadiantMaprohre". They are closed at one end 11, while they are provided at their other end 12 with an opening 13 to which a burner 14 is connected.
  • the burner 14 supplies the interior of the existing example of steel sheet Strahlungssammlungntzs 5 with fuel and air and lets exhaust gases from the interior of the Strahlungssammlungrohrs 5 out. It can be designed to maintain a flameless oxidation or even to form a flame.
  • the strong recirculation flow made possible in the double P-radiant heating tube facilitates flameless operation and thus uniform heating of the entire surface of the radiant heating tube 5.
  • the radiant heating tube 5 is supported at both ends 11, 12, and largely dead.
  • the end 11 is taken on the furnace wall 3 in a sliding bearing 15.
  • This is formed in the simplest case by an opening formed in the furnace wall 3, to the furnace chamber 1 open towards the opening, which may be lined, for example, with a circular in cross-section or oval or elongated sleeve 16.
  • This bushing 16 fits a pin 17 which is formed on the front-side closed end 11 of the Strahlungs2020s 5.
  • the pin 17 is, relative to its longitudinal direction, slidable in the sleeve 16. In addition, he has a certain amount of play, so that he in the socket 16 also something, at least by fractions of a degree or more, can pan.
  • the other end 12 of the Strahlungssammlungrohrs 5 has a tube extension 18 which extends through the furnace wall 2 therethrough. This is provided with an opening 19 through which the Strahlungs202059 5 can be introduced into the furnace chamber 1.
  • the opening 19 is closed by a closure device, for example in the form of a so-called Radiant heating tube box 20 closed, which closes tightly with the furnace wall 2.
  • the Strahlungs2020kasten 20 has a through hole 21 through which the pipe extension 18 extends.
  • a flange 22 which is disc-shaped and extends in the radial direction from the edge of the tube extension 18 away.
  • the flange 22 may be formed by a round or square disc and serve as a support for the burner 14.
  • it preferably forms one half of a spherical bearing 23, via which the tube extension 18 and with it the radiant heating tube 5 is pivotally held.
  • the passage opening 21 is preferably slightly larger than the outer diameter of the tube extension 18th
  • the other half of the hinge bearing 23 is formed by a carrier 24 having, for example, an upwardly open notch, groove or the like recess.
  • the carrier is formed, for example, by a trained from thick sheet metal, upwardly extending arm which has the recess at its upper free end. In the recess sits the lower edge of the vertically aligned in use flange 22.
  • the flange 22 is supported on the carrier 24 and with respect to the axial direction, ie held firmly along a central axis 25.
  • the central axis 25 is an imaginary center line, concentric through the tube extension 18 and the central portion 6.
  • the flange 22 can pivot, however, thanks to this storage about an axis transverse to the central axis 25 hinge axis, which in Fig.
  • flange 22 is perpendicular to the drawing plane. It strips the lower edge of the flange 22 and is horizontal in use oriented.
  • the flange 22 may, if necessary, pivot about the vertical direction, which may intersect the central axis 25 and in Fig. 2 parallel to the drawing plane.
  • the arm can also be formed forked and above two recesses, each of which hold a portion of the flange.
  • the flange and with it the jet pipe remains pivotable about the horizontal axis. They are not pivotable about the vertical axis in this case.
  • a compensator 26 may be provided. This is formed, for example, by a concentric to the pipe extension 18 Balgan onion in the form of a metal bellows, which is gas-tightly connected to one edge with the flange 22 and the other edge is kept gas-tight at the Strahlungssammlungrohrkasten 20.
  • the compensator is elastic and preferably arranged outside of the furnace chamber.
  • the compensator 26 closes off the channel formed by the passage opening 21 to the outside gas-tight. Illustrates a modified compensator 26 ' Fig. 2a ,
  • the compensator 26 ' is formed by a curled at the end radially outward wavy, ie outside smooth metal sleeve.
  • the radiant heating tube 5 described so far is, as in Fig. 3 shown, stored.
  • the sliding bearing 15 allows movements along the central axis 25 and thus serves to compensate for the thermal expansion of the Strahlungssammlungrohrs 5 or the change in distance between the furnace walls 2, 3 during the heating and cooling of the same.
  • the hinge bearing 23, however, serves to compensate for a relative displacement between the furnace walls 2, 3 parallel to each other. Thus, in deformations of the furnace walls 2, 3 no forces exerted on the Strahlungs2020 5.
  • the joint bearing 23 and the compensator 26 are preferably in the cold area, that is arranged outside of the furnace chamber 1, while the sliding bearing 15 in the hot area, that can be arranged in the furnace chamber.
  • Fig. 4 illustrates an alternative embodiment of the radiant heater tube 5 according to the invention.
  • the joint axis of the joint bearing 23 has moved slightly to the central axis 25. It thus extends above the lower edge of the flange 22.
  • This may for example be provided with lateral pins which are received in one or more holders 24, for example a corresponding fork, which holds the flange 22 on both sides.
  • annular space formed between the passage opening 21 and the tube extension 18 can be filled with a resilient seal, for example a sleeve made of glass wool.
  • the invention relates in particular to double P-RadiantMaprohre.
  • Strahlungssammlungrohre be installed laterally in the furnace wall and welded with a flange fixed to the furnace wall or screwed.
  • an abutment mounted on the radiant heating tube end is guided in the opposite side of the furnace inner wall in a suitable support.
  • This edition is usually designed so that the Strahlungssammlungrohr can stretch freely. Due to the warming, it usually expands by a few centimeters. From a static point of view, this is a fixed clamping of the radiant heating tube with a sliding bearing located at its free end. Both on the slide bearing as well as on the Stahlrohrflansch it can come to damage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)

Description

Die Erfindung betrifft ein Strahlungsheizrohr, das auch kurz als Strahlrohr bezeichnet wird.The invention relates to a Strahlungsheizrohr, which is also referred to briefly as a jet pipe.

Zur Beheizung von Ofenräumen sind Strahlungsheizrohre in Gebrauch, die innen von einer geeigneten Wärmequelle, beispielsweise einem Brenner, beheizt werden und sich dadurch erhitzen. In einem Ofenraum befindliches Gut wird vorwiegend durch die von dem Strahlungsheizrohr ausgehende Wärmestrahlung erhitzt.Radiant heating pipes are in use for heating furnace chambers, which are heated internally by a suitable heat source, for example a burner, and are thereby heated. In a furnace chamber located Good is heated mainly by the heat radiation emanating from the Strahlungsheizrohr.

Für Industrieanwendungen sind Strahlungsheizrohre mit mehreren Armen oder Zweigen in Gebrauch, die insgesamt ein beträchtliches Gewicht haben. Ein Ende des Strahlungsheizrohrs erstreckt sich durch eine Ofenwand hindurch. Außen ist meist ein Brenner angeflanscht. Um das beträchtliche Gewicht des Strahlungsheizrohrs aufzufangen, ist dieses an seinem gegenüberliegenden geschlossenen Ende häufig an der gegenüberliegenden Ofenwand zusätzlich abgestützt. Eine entsprechende Abstützung ist dazu meist in einer Schiebelagerung gefasst, damit sich das Strahlungsheizrohr in Betrieb in Längsrichtung ausdehnen kann.For industrial applications radiant heating tubes are in use with several arms or branches, which have a considerable weight overall. One end of the radiant heating tube extends through a furnace wall. Outside, usually a burner is flanged. In order to absorb the considerable weight of the Strahlungsheizrohrs, this is often additionally supported at its opposite closed end on the opposite furnace wall. A corresponding support is usually taken in a sliding bearing so that the Strahlungsheizrohr can extend in operation in the longitudinal direction.

Außerdem ist aus JP 08278001 sowie aus der US 4,520,789 ein mäanderförmiges Strahlheizrohr bekannt, dessen beide Schenkel in einer Ofenwand gefasst sind. Einer der U-Bögen ist an der gegenüberliegenden Ofenwand abgestützt. Dazu sind bewegliche Mittel zum Ausgleich temperaturbedingter Dehnungen vorgesehen.Besides, it is off JP 08278001 as well as from the US 4,520,789 a meandering Strahlheizrohr known, the two legs are taken in a furnace wall. One of the U-bows is supported on the opposite furnace wall. For this purpose, movable means are provided to compensate for temperature-induced strains.

Es zeigt sich, dass solche Schiebesitze gelegentlich und insbesondere dann zum Klemmen neigen, wenn das Strahlungsheizrohr sehr steif ist. Dies ist z.B. bei so genannten Doppel-P-Strahrohren der Fall. Das Klemmen kann Schäden an dem Strahlungsheizrohr oder seiner Lagerung hervorrufen. Solche Schäden können zu Gasundichtigkeiten führen, die nicht hingenommen werden.It turns out that such sliding seats occasionally and in particular tend to jam when the Strahlungsheizrohr is very stiff. This is e.g. in so-called double-P tubes the case. Clamping can cause damage to the radiant tube or its storage. Such damage can lead to gas leaks that are unacceptable.

Davon ausgehend ist es Aufgabe der Erfindung, eine Möglichkeit anzugeben, wie die Integrität von Strahlungsheizrohren insbesondere hinsichtlich deren Gasdichtigkeit auf einfache Weise sichergestellt werden kann.On this basis, it is an object of the invention to provide a way how the integrity of Strahlungsheizrohren can be ensured in a simple manner, in particular with regard to their gas tightness.

Diese Aufgabe wird mit dem Strahlungsheizrohr nach Anspruch 1 gelöst:This object is achieved with the Strahlungsheizrohr according to claim 1:

Das erfindungsgemäße Strahlungsheizrohr weist einen Rohrkörper mit einem vorzugsweise gerade ausgebildeten Mittelabschnitt und zwei neben dem Mittelabschnitt angeordneten Rückführungsabschnitten auf. Diese bilden mit dem Mittelabschnitt Schleifen, in denen sich z.B. eine Gasrezirkulationsströmung ausbilden kann. Derartige Strahlungsheizrohre haben eine große strahlende Oberfläche. Andererseits sind sie relativ steif und schwer. Das Strahlungsheizrohr ist deshalb vorzugsweise an beiden Enden abgestützt. An seinem einen Ende ist es an einem Schiebelager abgestützt, das eine axiale Ausdehnung des Strahlungsheizrohres ausgleichen kann. Das Schiebelager gestattet zusätzlich eine gewisse Schwenkbewegung des Strahlungsheizrohres. An seinem gegenüberliegenden Ende ist das Strahlungsheizrohr an einem Gelenklager gefasst, das eine Schwenkbewegung des Strahlungsheizrohrs um mindestens eine Achse ermöglicht. Das Gelenklager gestattet vorzugsweise keine Axialbewegung des Strahlungsheizrohres, sondern fixiert dieses bezüglich der Axialrichtung.The radiant heating tube according to the invention has a tubular body with a preferably straight-shaped middle section and two return sections arranged next to the central section. These form with the center section loops in which, for example, a gas recirculation flow can form. Such Strahlungsheizrohre have a large radiating surface. On the other hand, they are relatively stiff and heavy. The radiant heating tube is therefore preferably supported at both ends. At one end it is supported on a sliding bearing, which can compensate for an axial extension of the radiant heating tube. The sliding bearing also allows a certain pivoting movement of the Strahlungsheizrohres. At its opposite end, the radiant heating tube is gripped by a pivot bearing which allows pivotal movement of the radiant heating tube about at least one axis. The joint bearing preferably does not permit axial movement of the radiant heating tube, but fixes it with respect to the axial direction.

Das Schiebelager und das Gelenklager sind vorzugsweise an verschiedenen, einander gegenüberliegenden Ofenwänden angeordnet, zwischen denen das Strahlungsheizrohr angeordnet ist und an denen sich das Strahlungsheizrohr abstützt. Damit kann die Lagerung des Strahlungsheizrohrs sowohl die thermisch bedingte Längenänderung des Strahlungsheizrohrs sowie auch thermisch oder alterungsbedingte Bewegungen der Ofenwände gegeneinander ausgleichen. Insbesondere bei sehr großen, langen oder hohen Öfen, bei denen eine längere Reihe von zueinander parallelen Strahlungsheizrohren einen länglichen Ofenraum erhitzt, können sich die beiden Ofenwände gegebenenfalls parallel zueinander etwas verschieben. Die beiden Lager des Strahlungsheizrohres, die beide eine gewisse Schwenkbewegung zulassen, halten das Strahlungsheizrohr im Wesentlichen kräftefrei und vermeiden den Eintrag von Spannungen in das Strahlungsheizrohr. Auch kann eine seitliche Durchbiegung des Strahlungsheizrohrs ausgeglichen werden, wenn diese aus thermischen oder sonstigen Gründen auftreten sollte. Dies gilt sowohl für keramische Strahlungsheizrohre, wie insbesondere auch für Strahlungsheizrohre aus Stahlblech.The sliding bearing and the spherical plain bearing are preferably arranged on different, opposing furnace walls, between which the Strahlungsheizrohr is arranged and against which the Strahlungsheizrohr supported. Thus, the storage of Strahlungsheizrohrs compensate for both the thermally induced change in length of the Strahlungsheizrohrs and thermally or aging-related movements of the furnace walls against each other. Particularly in the case of very large, long or high furnaces, in which a longer row of radiation heaters parallel to one another heats an elongated furnace space, the two furnace walls may possibly shift slightly in parallel to each other. The two bearings of the Strahlungsheizrohres, both allow a certain pivoting movement, keep the Strahlungsheizrohr substantially free of force and avoid the entry of stresses in the Strahlungsheizrohr. Also, a lateral deflection of the Strahlungsheizrohrs be compensated if this should occur for thermal or other reasons. This applies both to ceramic radiant heat pipes, and in particular also to radiant heating pipes made of sheet steel.

Vorzugsweise legt das Gelenklager eine Schwenkachse fest, die quer zu dem Strahlungsheizrohr verläuft. Die Schwenkachse kann außermittig, z.B. am Rand des Strahlungsheizrohres festgelegt sein. Vorzugsweise ist die zugeordnete Gelenklagerung außerhalb des Ofenraums in der Nähe der Ofenwand angeordnet. Beispielsweise ist sie zwischen dem Brenner und der Ofenwand positioniert.Preferably, the hinge bearing defines a pivot axis which is transverse to the Strahlungsheizrohr. The pivot axis may be eccentric, e.g. be set at the edge of Strahlungsheizrohres. Preferably, the associated hinge bearing is disposed outside the furnace space in the vicinity of the furnace wall. For example, it is positioned between the burner and the furnace wall.

Die Gelenkachse der Schwenklagerung ist vorzugsweise horizontal orientiert. Damit kann das in der Schiebelagerung gefasste Ende des Strahlungsheizrohrs etwas angehoben oder abgesenkt werden, ohne dass schädliche Kräfte auf das Strahlungsheizrohr einwirken.The hinge axis of the pivot bearing is preferably oriented horizontally. Thus, the captured in the sliding bearing end of Strahlungsheizrohrs can be raised or lowered slightly without harmful forces on the Radiation heating pipe act.

Es ist weiter möglich, das Gelenklager so auszubilden, dass das Strahlungsheizrohr auch etwas seitlich schwenken kann. Es schwenkt dabei um eine vertikale Schwenkachse. Somit werden bei keinerlei Verformung der Ofenwände irgendwelche wesentlichen Kräfte auf das Strahlungsheizrohr ausgeübt.It is also possible to design the joint bearing in such a way that the radiant heating tube can pivot slightly laterally. It pivots about a vertical pivot axis. Thus, no deformation of the furnace walls exerts any significant forces on the radiant heating tube.

Bei dem erfindungsgemäßen Strahlungsheizrohr ist an dem brennerseitigen Ende des Strahlungsheizrohrs keine feste Einspannung des Rohrendes vorhanden. Vielmehr ist das Strahlungsheizrohr um einige Grad schwenkbar gefasst.In the radiant heating tube according to the invention, no fixed clamping of the tube end is present at the burner-side end of the radiant heating tube. Rather, the Strahlungsheizrohr is taken pivotable by a few degrees.

Im einfachsten Fall kann das Gelenklager durch einen Halter mit einer nach oben offenen Aufnahme gebildet sein, in der ein Flansch des Strahlungsheizrohrs liegt. Die Aufnahme fixiert den Flansch in Vertikalrichtung sowie in Axialrichtung, lässt aber ein Schwenken des Flansches um einige Grad sowohl um eine Horizontalachse, wie auch um eine Vertikalachse zu.In the simplest case, the joint bearing may be formed by a holder with an upwardly open receptacle in which a flange of the Strahlungsheizrohrs lies. The receptacle fixes the flange in the vertical direction and in the axial direction, but allows pivoting of the flange by a few degrees both about a horizontal axis, as well as about a vertical axis.

Vorzugsweise ist zwischen dem an dem Gelenklager gelagerten Ende des Strahlungsheizrohrs bzw. dem Flansch und der Ofenwand ein Kompensator angeordnet, der den Ofenraum zu dem Flansch hin gasdicht abschließt ohne das Ende des Strahlungsheizrohrs fest einzuspannen. Der Kompensator kann an einem Strahlungsheizrohrkasten angebracht sein, der in der Ofenwand sitzt. Der Strahlungsheizrohrkasten verschließt eine in der Ofenwand vorgesehene Öffnung, durch die das Strahlungsheizrohr in den Ofenraum eingeführt werden kann. Der Kompensator wird z.B. durch eine gewellte dünnwandige Blechhülse gebildet, deren eines Ende mit dem Strahlrohr und deren anderes Ende mit der Ofenwand oder einem Einsatz verbunden ist, der in einer Öffnung der Ofenwand sitzt. Der Kompensator kann an der Außenseite der Ofenwand, d.h. außerhalb des Ofenraums oder notfalls auch innerhalb desselben angeordnet sein.Preferably, a compensator is arranged between the bearing on the spherical bearing end of Strahlungsheizrohrs or the flange and the furnace wall, which closes off the furnace chamber gas-tight to the flange without firmly clamp the end of the Strahlungsheizrohrs. The compensator may be attached to a radiant heatbox box that sits in the furnace wall. The Strahlungsheizrohrkasten closes a provided in the furnace wall opening through which the Strahlungsheizrohr can be introduced into the furnace chamber. The compensator is formed for example by a corrugated thin-walled sheet metal sleeve, one end of which is connected to the jet pipe and the other end to the furnace wall or an insert which is in an opening of the furnace wall sitting. The compensator can be arranged on the outside of the furnace wall, ie outside the furnace chamber or, if necessary, also inside thereof.

Weitere Einzelheiten vorteilhafter Ausführungsformen der Erfindung ergeben sich aus der Zeichnung oder der Beschreibung. Die Beschreibung ist auf wesentliche Aspekte der Erfindung sowie sonstige Gegebenheiten gerichtet. Die Zeichnung offenbart weitere Details und ist ergänzend heranzuziehen. Es zeigen:

  • Fig. 1 einen Ofenraum mit Strahlungsheizrohren zur Beheizung desselben in geschnittener Prinzipdarstellung,
  • Fig. 2 ein Strahlungsheizrohr der Anordnung nach Fig. 1 in gesonderter geschnittener Prinzipdarstellung,
  • Fig. 2a eine abgewandelte Ausführungsform eines Kompensators,
  • Fig. 3 das Prinzip der Lagerung des Strahlungsheizrohrs nach Fig. 2, in Prinzipdarstellung, und
  • Fig. 4 eine abgewandelte Ausführungsform der Erfindung in geschnittener Prinzipdarstellung.
Further details of advantageous embodiments of the invention will become apparent from the drawing or the description. The description is directed to essential aspects of the invention as well as other facts. The drawing reveals more details and is complementary. Show it:
  • Fig. 1 a furnace chamber with Strahlungsheizrohren for heating the same in a sectioned schematic representation,
  • Fig. 2 a Strahlungsheizrohr the arrangement according to Fig. 1 in a separate cut schematic diagram,
  • Fig. 2a a modified embodiment of a compensator,
  • Fig. 3 the principle of storage of Strahlungsheizrohrs after Fig. 2 , in schematic representation, and
  • Fig. 4 a modified embodiment of the invention in a sectional schematic representation.

In Fig. 1 ist ein Ofenraum 1 veranschaulicht, der von zwei Ofenraumwänden 2, 3 begrenzt wird. Der Ofenraum 1 kann ein länglicher Kanal oder Tunnel sein, durch den sich quer untereinander vorzugsweise gleich ausgebildete, in einer Reihe angeordnete Strahlungsheizrohre 4, 5 erstrecken. Sie dienen der Erwärmung des Ofenraums sowie insbesondere der Erwärmung von entsprechendem Behandlungsgut, beispielsweise einem Blechband, das längs durch den Ofenraum geführt wird.In Fig. 1 a furnace chamber 1 is illustrated, which is bounded by two furnace space walls 2, 3. The furnace chamber 1 may be an elongate channel or tunnel through which radiant heat pipes 4, 5, which are preferably of the same design and arranged in a row, extend. They serve to heat the oven space and in particular the heating of the corresponding material to be treated, for example, a metal strip, which is guided longitudinally through the furnace chamber.

Die Strahlungsheizrohre 4, 5, sind jeweils an beiden Ofenwänden 2, 3 gelagert, wie am Beispiel des Strahlungsheizrohrs 5 aus Fig. 2 zu erkennen ist. Es besteht vorzugsweise aus Stahlblech und weist einen rohrförmigen, vorzugsweise geraden Mittelabschnitt 6 und Rückführungsabschnitte 7, 8 auf, die mit dem Mittelabschnitt 6 jeweils Schleifen 9, 10 bilden. Derartige Strahlungsheizrohre 4, 5, werden auch als "Doppel-P-Strahlungsheizrohre" bezeichnet. Sie sind an einem Ende 11 geschlossen, während sie an ihrem anderen Ende 12 mit einer Öffnung 13 versehen sind, an die ein Brenner 14 angeschlossen ist. Der Brenner 14 versorgt den Innenraum des z.B. aus Stahlblech bestehenden Strahlungsheizrohrs 5 mit Brennstoff und Luft und lässt Abgase aus dem Innenraum des Strahlungsheizrohrs 5 heraus. Er kann zur Aufrechterhaltung einer flammenlosen Oxidation oder auch zur Ausbildung einer Flamme eingerichtet sein. Die in dem Doppel-P-Strahlungsheizrohr ermöglichte starke Rezirkulationsströmung erleichtert flammenlosen Betrieb und somit eine gleichmäßige Aufheizung der gesamten Oberfläche des Strahlungsheizrohrs 5.The Strahlungsheizrohre 4, 5, each mounted on two furnace walls 2, 3, as in the example of the radiant heater 5 from Fig. 2 can be seen. It is preferably made of sheet steel and has a tubular, preferably straight middle section 6 and return sections 7, 8, which each form loops 9, 10 with the central section 6. Such Strahlungsheizrohre 4, 5, be also referred to as "double P-Radiantheizrohre". They are closed at one end 11, while they are provided at their other end 12 with an opening 13 to which a burner 14 is connected. The burner 14 supplies the interior of the existing example of steel sheet Strahlungsheizrohrs 5 with fuel and air and lets exhaust gases from the interior of the Strahlungsheizrohrs 5 out. It can be designed to maintain a flameless oxidation or even to form a flame. The strong recirculation flow made possible in the double P-radiant heating tube facilitates flameless operation and thus uniform heating of the entire surface of the radiant heating tube 5.

Das Strahlungsheizrohr 5 ist an beiden Enden 11, 12, abgestützt und weitgehend spannungslos. Das Ende 11 ist an der Ofenwand 3 in einem Schiebelager 15 gefasst. Dieses wird im einfachsten Fall durch eine in der Ofenwand 3 ausgebildete, zu dem Ofenraum 1 hin offene Öffnung gebildet, die beispielsweise mit einer im Querschnitt kreisrunden oder auch ovalen oder länglichen Buchse 16 ausgekleidet sein kann. In diese Buchse 16 passt ein Zapfen 17, der an dem stirnseitigen geschlossenen Ende 11 des Strahlungsheizrohrs 5 ausgebildet ist. Der Zapfen 17 ist, bezogen auf seine Längsrichtung, in der Buchse 16 verschiebbar. Außerdem hat er ein gewisses Spiel, so dass er in der Buchse 16 auch etwas, zumindest um Bruchteile eines Grads oder auch mehr, schwenken kann.The radiant heating tube 5 is supported at both ends 11, 12, and largely dead. The end 11 is taken on the furnace wall 3 in a sliding bearing 15. This is formed in the simplest case by an opening formed in the furnace wall 3, to the furnace chamber 1 open towards the opening, which may be lined, for example, with a circular in cross-section or oval or elongated sleeve 16. In this bushing 16 fits a pin 17 which is formed on the front-side closed end 11 of the Strahlungsheizrohrs 5. The pin 17 is, relative to its longitudinal direction, slidable in the sleeve 16. In addition, he has a certain amount of play, so that he in the socket 16 also something, at least by fractions of a degree or more, can pan.

Das andere Ende 12 des Strahlungsheizrohrs 5 weist einen Rohrfortsatz 18 auf, der sich durch die Ofenwand 2 hindurch erstreckt. Diese ist mit einer Öffnung 19 versehen, durch die das Strahlungsheizrohr 5 in den Ofenraum 1 eingeführt werden kann. Die Öffnung 19 ist durch eine Verschlusseinrichtung zum Beispiel in Gestalt eines sogenannten Strahlungsheizrohrkastens 20 verschlossen, der mit der Ofenwand 2 dicht abschließt. Der Strahlungsheizrohrkasten 20 weist eine Durchgangsöffnung 21 auf, durch die sich der Rohrfortsatz 18 erstreckt.The other end 12 of the Strahlungsheizrohrs 5 has a tube extension 18 which extends through the furnace wall 2 therethrough. This is provided with an opening 19 through which the Strahlungsheizrohr 5 can be introduced into the furnace chamber 1. The opening 19 is closed by a closure device, for example in the form of a so-called Radiant heating tube box 20 closed, which closes tightly with the furnace wall 2. The Strahlungsheizrohrkasten 20 has a through hole 21 through which the pipe extension 18 extends.

Um seine Öffnung 13 herum ist der Rohrfortsatz 18 zum Beispiel durch einen Flansch 22 versehen, der scheibenförmig ausgebildet ist und sich in Radialrichtung von dem Rand des Rohrfortsatzes 18 weg erstreckt. Der Flansch 22 kann durch eine runde oder eckige Scheibe gebildet sein und als Träger für den Brenner 14 dienen. Außerdem bildet er vorzugsweise eine Hälfte eines Gelenklagers 23, über das der Rohrfortsatz 18 und mit ihm das Strahlungsheizrohr 5 schwenkbar gehalten ist. Um Schwenkbewegungen des Strahlungsheizrohrs 5 wenigstens in bescheidenem Maße, d.h. um einige Grad zu gestatten, ist die Durchgangsöffnung 21 vorzugsweise geringfügig größer als der Außendurchmesser des Rohrfortsatzes 18.Around its opening 13 around the tube extension 18 is provided for example by a flange 22 which is disc-shaped and extends in the radial direction from the edge of the tube extension 18 away. The flange 22 may be formed by a round or square disc and serve as a support for the burner 14. In addition, it preferably forms one half of a spherical bearing 23, via which the tube extension 18 and with it the radiant heating tube 5 is pivotally held. In order to at least moderate movements of the radiant heating tube 5, i. to allow a few degrees, the passage opening 21 is preferably slightly larger than the outer diameter of the tube extension 18th

Die andere Hälfte des Gelenklagers 23 ist durch einen Träger 24 gebildet, der beispielsweise eine nach oben offene Kerbe, Nut oder dergleichen Ausnehmung aufweist. Der Träger wird z.B. durch einen aus dickem Blech ausgebildeten, sich nach oben erstreckenden Arm gebildet, der an seinem oberen freien Ende die Ausnehmung aufweist. In der Ausnehmung sitzt der unterseitige Rand des in Gebrauch vertikal ausgerichteten Flansches 22. Damit ist der Flansch 22 an dem Träger 24 abgestützt und bezüglich der Axialrichtung, d.h. längs einer Mittelachse 25 fest gehalten. Die Mittelachse 25 ist eine gedachte Mittellinie, konzentrisch durch den Rohrfortsatz 18 und den Mittelabschnitt 6. Der Flansch 22 kann dank dieser Lagerung aber um eine quer zu der Mittelachse 25 stehende Gelenkachse schwenken, die in Fig. 2 senkrecht auf der Zeichenebene steht. Sie streift den unteren Rand des Flanschs 22 und ist in Gebrauch horizontal orientiert. Außerdem kann der Flansch 22 bedarfsweise etwas um die Vertikalrichtung schwenken, die die Mittelachse 25 schneiden kann und in Fig. 2 parallel zur Zeichenebene liegt.The other half of the hinge bearing 23 is formed by a carrier 24 having, for example, an upwardly open notch, groove or the like recess. The carrier is formed, for example, by a trained from thick sheet metal, upwardly extending arm which has the recess at its upper free end. In the recess sits the lower edge of the vertically aligned in use flange 22. Thus, the flange 22 is supported on the carrier 24 and with respect to the axial direction, ie held firmly along a central axis 25. The central axis 25 is an imaginary center line, concentric through the tube extension 18 and the central portion 6. The flange 22 can pivot, however, thanks to this storage about an axis transverse to the central axis 25 hinge axis, which in Fig. 2 is perpendicular to the drawing plane. It strips the lower edge of the flange 22 and is horizontal in use oriented. In addition, the flange 22 may, if necessary, pivot about the vertical direction, which may intersect the central axis 25 and in Fig. 2 parallel to the drawing plane.

Der Arm kann auch gegabelt ausgebildet sein und oben zwei Ausnehmungen aufweisen, die jeweils einen Abschnitt des Flansches fassen. Dadurch bleibt der Flansch und mit ihm das Strahlrohr um die Horizontalachse schwenkbar. Um die Vertikalachse sind sie in diesem Fall nicht schwenkbar.The arm can also be formed forked and above two recesses, each of which hold a portion of the flange. As a result, the flange and with it the jet pipe remains pivotable about the horizontal axis. They are not pivotable about the vertical axis in this case.

Zur Herstellung der Gasdichtheit des Ofens kann ein Kompensator 26 vorgesehen sein. Dieser wird beispielsweise durch eine zu dem Rohrfortsatz 18 konzentrische Balganordnung in Form eines Metallfaltenbalges gebildet, der mit einem Rand mit dem Flansch 22 gasdicht verbunden ist und dessen anderer Rand an dem Strahlungsheizrohrkasten 20 gasdicht gehalten ist. Der Kompensator ist elastisch ausgebildet und vorzugsweise außerhalb des Ofenraums angeordnet. Der Kompensator 26 schließt den durch die Durchgangsöffnung 21 gebildeten Kanal nach außen hin gasdicht ab. Einen abgewandelten Kompensator 26' veranschaulicht Fig. 2a. Der Kompensator 26' ist durch eine am Ende radial auswärts gebördelte ungewellte, d.h. außen glatte Metallmanschette gebildet.To make the gas-tightness of the furnace, a compensator 26 may be provided. This is formed, for example, by a concentric to the pipe extension 18 Balganordnung in the form of a metal bellows, which is gas-tightly connected to one edge with the flange 22 and the other edge is kept gas-tight at the Strahlungsheizrohrkasten 20. The compensator is elastic and preferably arranged outside of the furnace chamber. The compensator 26 closes off the channel formed by the passage opening 21 to the outside gas-tight. Illustrates a modified compensator 26 ' Fig. 2a , The compensator 26 'is formed by a curled at the end radially outward wavy, ie outside smooth metal sleeve.

Das insoweit beschriebene Strahlungsheizrohr 5 ist, wie in Fig. 3 dargestellt, gelagert. Das Schiebelager 15 gestattet Bewegungen längs der Mittelachse 25 und dient somit dem Ausgleich der thermischen Ausdehnung des Strahlungsheizrohrs 5 oder auch der Abstandsänderung zwischen den Ofenwänden 2, 3 beim Aufheizen und Abkühlen desselben. Das Gelenklager 23 dient hingegen dem Ausgleich einer Relativverschiebung zwischen den Ofenwänden 2, 3 parallel zueinander. Somit werden bei Verformungen der Ofenwände 2, 3 keine Kräfte mehr auf das Strahlungsheizrohr 5 ausgeübt. Das Gelenklager 23 und der Kompensator 26 sind vorzugsweise im kalten Bereich, d.h. außerhalb des Ofenraums 1 angeordnet, während das Schiebelager 15 im heißen Bereich, d.h. im Ofenraum angeordnet sein kann.The radiant heating tube 5 described so far is, as in Fig. 3 shown, stored. The sliding bearing 15 allows movements along the central axis 25 and thus serves to compensate for the thermal expansion of the Strahlungsheizrohrs 5 or the change in distance between the furnace walls 2, 3 during the heating and cooling of the same. The hinge bearing 23, however, serves to compensate for a relative displacement between the furnace walls 2, 3 parallel to each other. Thus, in deformations of the furnace walls 2, 3 no forces exerted on the Strahlungsheizrohr 5. The joint bearing 23 and the compensator 26 are preferably in the cold area, that is arranged outside of the furnace chamber 1, while the sliding bearing 15 in the hot area, that can be arranged in the furnace chamber.

Fig. 4 veranschaulicht eine alternative Ausführungsform des erfindungsgemäßen Strahlungsheizrohrs 5. Es wird unter Zugrundelegung gleicher Bezugszeichen auf die vorstehende Beschreibung verwiesen. Im Unterschied zu dieser ist die Gelenkachse des Gelenklagers 23 jedoch etwas an die Mittelachse 25 herangerückt. Sie verläuft somit oberhalb des unteren Randes des Flansches 22. Dieser kann beispielsweise mit seitlichen Zapfen versehen sein, die in einem oder mehreren Haltern 24, z.B. einer entsprechenden Gabel aufgenommen sind, die den Flansch 22 beidseitig fasst. Fig. 4 illustrates an alternative embodiment of the radiant heater tube 5 according to the invention. Reference is made to the above description with reference to the same reference numerals. In contrast to this, however, the joint axis of the joint bearing 23 has moved slightly to the central axis 25. It thus extends above the lower edge of the flange 22. This may for example be provided with lateral pins which are received in one or more holders 24, for example a corresponding fork, which holds the flange 22 on both sides.

Außerdem kann der zwischen der Durchgangsöffnung 21 und dem Rohrfortsatz 18 ausgebildete Ringraum mit einer nachgiebigen Dichtung, beispielsweise einer Muffe aus Glaswolle ausgefüllt sein.In addition, the annular space formed between the passage opening 21 and the tube extension 18 can be filled with a resilient seal, for example a sleeve made of glass wool.

Zusammenfassend bleibt festzuhalten, dass sich die Erfindung insbesondere auf Doppel-P-Strahlungsheizrohre bezieht. Üblicherweise werden Strahlungsheizrohre seitlich in die Ofenwand eingebaut und mit einem Flansch fest mit der Ofenwand verschweißt oder verschraubt. Üblicherweise wird ein an dem Strahlungsheizrohrende angebrachtes Gegenlager in der Gegenseite der Ofeninnenwand in einer geeigneten Auflage geführt. Diese Auflage ist üblicherweise so gestaltet, dass sich das Strahlungsheizrohr frei dehnen kann. Durch die Erwärmung dehnt es sich meist um einige Zentimeter aus. Statisch gesehen handelt es sich um eine feste Einspannung des Strahlungsheizrohrs mit einem an seinem freien Ende liegenden Gleitlager. Sowohl an dem Gleitlager wie auch an dem Stahlrohrflansch kann es zu Schäden kommen. Insbesondere bei Doppel-P-Strahlungsheizrohren ist dies wegen der hohen Steifigkeit des Strahlungsheizrohrs der Fall. Die Kräfte können nicht immer durch Verformung des Rohrs aufgenommen werden. Es kann zu Schweißnahtbrüchen zwischen dem Strahlungsheizrohrflansch und dem Strahlungsheizrohr oder zwischen dem Strahlungsheizrohr und dem Gegenlager kommen. Die Erfindung hilft diesem Umstand ab, indem die feste Einspannung des brennerseitigen Strahlungsheizrohrendes durch ein Gelenklager ersetzt wird.In summary, it should be noted that the invention relates in particular to double P-Radiantheizrohre. Usually Strahlungsheizrohre be installed laterally in the furnace wall and welded with a flange fixed to the furnace wall or screwed. Usually, an abutment mounted on the radiant heating tube end is guided in the opposite side of the furnace inner wall in a suitable support. This edition is usually designed so that the Strahlungsheizrohr can stretch freely. Due to the warming, it usually expands by a few centimeters. From a static point of view, this is a fixed clamping of the radiant heating tube with a sliding bearing located at its free end. Both on the slide bearing as well as on the Stahlrohrflansch it can come to damage. This is the case in particular with double P-radiant heating tubes because of the high rigidity of the radiant heating tube. The forces can not always be absorbed by deformation of the pipe. There may be weld breaks between the radiant heating tube flange and the radiant heating tube or between the radiant heating tube and the anvil. The invention alleviates this by replacing the fixed clamping of the burner-side radiant heating tube end with a spherical plain bearing.

Bezugszeichenreference numeral

11
Ofenraumfurnace
2, 32, 3
Ofenwändefurnace walls
4, 54, 5
Strahlungsheizrohrradiant heating
66
Mittelabschnittmidsection
7, 87, 8
RückführungsabschnitteReturn portions
9, 109, 10
Schleifengrind
11, 1211, 12
Endenend up
1313
Öffnungopening
1414
Brennerburner
1515
Schiebelagersliding bearings
1616
BuchseRifle
1717
Zapfenspigot
1818
RohrfortsatzTubular extension
1919
Öffnungopening
2020
StrahlungsheizrohrkastenStrahlungsheizrohrkasten
2121
DurchgangsöffnungThrough opening
2222
Flanschflange
2323
GelenklagerSpherical plain bearings
2424
Trägercarrier
2525
Mittelachsecentral axis
2626
Kompensatorcompensator

Claims (15)

  1. Radiant heating tube (5)
    with a tube body having a central portion (6) and at least one return portion (7, 8) which is arranged next to the central portion (6) and forms a loop (9, 10) with the central portion (6),
    with an articulated mount (23) arranged at one end (12) of the radiant heating tube (5), with a sliding mount (15) arranged at the other end (11) of the radiant heating tube (5) opposite the articulated mount (23), and
    with a burner (14) for heating the radiant heating tube (5),
    characterised in that in total at least two return portions (7, 8) are provided which each form a loop (9, 10) with the central portion (6).
  2. Radiant heating tube according to claim 1, characterised in that the tube body is closed at its end (11) provided with the sliding mount (15).
  3. Radiant heating tube according to claim 1, characterised in that the return portions (7, 8) extend parallel to the central portion (6).
  4. Radiant heating tube according to claim 1, characterised in that the central portion (6) and the return portion (7, 8) are made of sheet steel or cast steel.
  5. Radiant heating tube according to claim 1, characterised in that the articulated mount (23) establishes at least one pivot axis.
  6. Radiant heating tube according to claim 1, characterised in that the articulated mount (23) establishes a pivot axis which is oriented horizontally.
  7. Radiant heating tube according to claim 6, characterised in that the pivot axis does not intersect the central axis (25) of the central portion (6) but runs transversely to this.
  8. Radiant heating tube according to claim 1, characterised in that the pivot mount (23) is arranged below a burner connection (22) of the radiant heating tube (5).
  9. Radiant heating tube according to claim 1, characterised in that the pivot mount (23) is arranged outside an oven chamber (1) which can be heated by the radiant heating tube (5).
  10. Radiant heating tube according to claim 1, characterised in that the radiant heating tube (5) extends between two oven walls (2, 3), wherein an abutment (16) belonging to the sliding mount (15) is arranged on one oven wall (3), and the articulated mount (23) is arranged on an opposite oven wall (2).
  11. Radiant heating tube according to claim 1, characterised in that the articulated mount (23) is arranged outside an oven chamber (1) which is heated by the radiant heating tube (5).
  12. Radiant heating tube according to claim 10, characterised in that the radiant heating tube (5) passes pivotably through the oven wall (2) on which the pivot mount (23) is arranged.
  13. Radiant heating tube according to claim 12, characterised in that the end of the radiant heating tube (5) in the vicinity of the pivot mount (23) is sealed against the oven wall (2).
  14. Radiant heating tube according to claim 13, characterised in that a bellows arrangement (26) is provided as a seal.
  15. Radiant heating tube according to claim 1, characterised in that the burner (14) is a burner configured for flameless oxidation.
EP09772190.6A 2008-07-04 2009-07-03 Radiant heating arrangement in which distortions are compensated Active EP2304318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202008009065U DE202008009065U1 (en) 2008-07-04 2008-07-04 Radiant heating arrangement with delay compensation
PCT/EP2009/004850 WO2010000490A2 (en) 2008-07-04 2009-07-03 Radiant heating arrangement in which distortions are compensated

Publications (2)

Publication Number Publication Date
EP2304318A2 EP2304318A2 (en) 2011-04-06
EP2304318B1 true EP2304318B1 (en) 2017-03-08

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US (1) US9603199B2 (en)
EP (1) EP2304318B1 (en)
JP (1) JP5605580B2 (en)
KR (1) KR101548551B1 (en)
CN (1) CN102112809B (en)
DE (1) DE202008009065U1 (en)
WO (1) WO2010000490A2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT508264B1 (en) * 2009-10-13 2010-12-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
AT508368B1 (en) * 2009-10-13 2011-01-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
CN102278758B (en) * 2011-06-17 2013-01-02 中冶京诚工程技术有限公司 Heating device of radiant tube
DE202012103366U1 (en) * 2012-09-04 2012-10-08 WS - Wärmeprozesstechnik GmbH radiant heating
WO2014072839A1 (en) * 2013-01-02 2014-05-15 Bisson Massimiliano Support device for radiant tubes
EP2754958B1 (en) 2013-01-10 2017-06-21 LOI Thermprocess GmbH Heating radiator tube
EP3032171B1 (en) * 2014-12-09 2018-01-31 WS-Wärmeprozesstechnik GmbH Regenerativ heated radiant tube
ITUB20152984A1 (en) * 2015-08-07 2017-02-07 Nicro S P A Radiant tube with corrugated shank.
KR102056285B1 (en) 2018-05-23 2019-12-16 주식회사 서울바이오 Manufacturing method co cocopeat with tannin-reducing process, and plant treatment agent comprising the cocopeat manufactured by the same
IT201800006668A1 (en) * 2018-06-26 2019-12-26 Massimiliano Bisson SUPPORT DEVICE FOR RADIANT TUBES
CN110809337B (en) * 2019-09-29 2021-09-03 洛阳轴承研究所有限公司 Electrical heating ring type bearing heating tool
DE102020100748A1 (en) * 2020-01-14 2021-07-15 Loi Thermprocess Gmbh Device for supporting at least two radiant heating tubes in an oven room and an industrial oven
CA3123680A1 (en) * 2020-07-07 2022-01-07 Superior Radiant Products Ltd. System for controlling thermal expansion in a tube heater
AT526742A1 (en) 2022-12-07 2024-06-15 Andritz Ag Maschf HOLDING DEVICE FOR ELECTRICALLY HEATED RADIATOR TUBES

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173905A (en) * 1999-12-17 2001-06-29 Toyota Motor Corp Exhaust gas circulating indirect heating pyrogen unit

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664749A (en) * 1927-03-28 1928-04-03 Westinghouse Electric & Mfg Co Tilting-hearth-tray furnace
US2632503A (en) * 1948-04-27 1953-03-24 Standard Oil Dev Co Tubular radiant gas burner
US3552362A (en) * 1969-02-14 1971-01-05 Selas Corp Of America Tube heater
US3920383A (en) * 1974-06-20 1975-11-18 Electric Furnace Co Fluted surface heat exchanger
DE2759004C2 (en) * 1977-12-30 1984-01-19 Institut Straumann Ag, Waldenburg Oil burner for low heating output
LU84040A1 (en) * 1982-03-26 1983-11-17 Cockerill Sambre Sa IMPROVED SUPPORTS OF ANNEALING OVEN HEATING BODY
US4994502A (en) * 1987-07-01 1991-02-19 Basf Corporation Process for the preparation of integral skin polyurethane steering wheels
JPS6438415U (en) * 1987-08-31 1989-03-08
US4878480A (en) * 1988-07-26 1989-11-07 Gas Research Institute Radiant tube fired with two bidirectional burners
FR2643447B1 (en) * 1989-02-17 1991-10-04 Stein Heurtey RADIANT TUBE SYSTEM FOR HEATING OVENS
JPH05272708A (en) * 1992-03-26 1993-10-19 Kobe Steel Ltd Furnace wall fixing structure for radiant tube
JPH07280477A (en) * 1994-04-06 1995-10-27 Nippon Steel Corp Radiant tube
CA2176488C (en) * 1994-09-24 2000-06-20 Yoshiki Fujii Radiant tube burner and combustion method thereof
DE19505401C1 (en) * 1995-02-17 1996-04-04 Ws Waermeprozestechnik Gmbh Ceramic jet pipe for industrial furnace
JPH08278002A (en) * 1995-04-04 1996-10-22 Nippon Steel Corp Mounting structure of radiant tube
JPH08278001A (en) * 1995-04-04 1996-10-22 Nippon Steel Corp Mounting structure of radiant tube
JPH0933014A (en) * 1995-07-19 1997-02-07 Mitsubishi Materials Corp Radiation heat generating pipe
CN1188872A (en) * 1996-04-04 1998-07-29 丰田自动车株式会社 Double-end radiation tube burner system
JP3549981B2 (en) * 1996-05-08 2004-08-04 新日本製鐵株式会社 Furnace support structure of radiant tube with alternating heat storage
JP3855369B2 (en) * 1997-05-26 2006-12-06 Ｊｆｅスチール株式会社 Radiant tube support device
JP2000240904A (en) * 1999-02-19 2000-09-08 Kawasaki Steel Corp Supporting structure of furnace shell protruding section of radiant tube
JP2002317905A (en) * 2001-04-23 2002-10-31 Nippon Steel Corp In-furnace support structure of regenerative alternating combustion type radiant tube
JP2002317904A (en) * 2001-04-23 2002-10-31 Nippon Steel Corp In-furnace support structure for radiant tube
DE10217524B4 (en) * 2002-04-19 2005-10-13 WS - Wärmeprozesstechnik GmbH Burner with side outlet for flameless oxidation
CN2694117Y (en) * 2003-06-19 2005-04-20 杨思安 Heat storing type radiant tube
CN2697470Y (en) * 2003-07-24 2005-05-04 吴道洪 Heat storage type gas radiation pipe burner
JP2005241144A (en) * 2004-02-26 2005-09-08 Jfe Steel Kk Radiant tube type heating device
CN100561047C (en) * 2007-04-03 2009-11-18 北京科技大学 A kind of oxygen-enriched combustion radiant tube heaters
FR2920439B1 (en) * 2007-09-03 2009-11-13 Siemens Vai Metals Tech Sas METHOD AND DEVICE FOR THE CONTROLLED OXIDATION / REDUCTION OF THE SURFACE OF A CONTINUOUSLY STRAY STEEL BAND IN A RADIANT TUBE OVEN FOR ITS GALVANIZATION
DE102007000746B9 (en) * 2007-09-19 2009-06-04 Schott Ag Passing device for border roller and method for the production of flat glass
ATE492775T1 (en) * 2008-11-07 2011-01-15 Ws Waermeprozesstechnik Gmbh REGENERATOR FLOX BURNER
KR101025615B1 (en) * 2009-06-18 2011-03-30 주식회사 세창엔지니어링 Radiant tube
AT508264B1 (en) * 2009-10-13 2010-12-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
AT508368B1 (en) * 2009-10-13 2011-01-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
JP5471664B2 (en) * 2010-03-19 2014-04-16 Ｊｆｅスチール株式会社 Radiant tube
DE202012103366U1 (en) * 2012-09-04 2012-10-08 WS - Wärmeprozesstechnik GmbH radiant heating

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173905A (en) * 1999-12-17 2001-06-29 Toyota Motor Corp Exhaust gas circulating indirect heating pyrogen unit

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US9603199B2 (en) 2017-03-21
WO2010000490A3 (en) 2010-03-18
DE202008009065U1 (en) 2008-10-09
US20110120453A1 (en) 2011-05-26
KR101548551B1 (en) 2015-09-01
CN102112809A (en) 2011-06-29
EP2304318A2 (en) 2011-04-06
JP2011526352A (en) 2011-10-06
WO2010000490A2 (en) 2010-01-07
CN102112809B (en) 2013-09-18
JP5605580B2 (en) 2014-10-15

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