EP2304318A2 - Radiant heating arrangement in which distortions are compensated - Google Patents

Radiant heating arrangement in which distortions are compensated

Info

Publication number
EP2304318A2
EP2304318A2 EP09772190A EP09772190A EP2304318A2 EP 2304318 A2 EP2304318 A2 EP 2304318A2 EP 09772190 A EP09772190 A EP 09772190A EP 09772190 A EP09772190 A EP 09772190A EP 2304318 A2 EP2304318 A2 EP 2304318A2
Authority
EP
European Patent Office
Prior art keywords
strahlungsheizrohr
bearing
radiant heating
heating tube
furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09772190A
Other languages
German (de)
French (fr)
Other versions
EP2304318B1 (en
Inventor
Joachim A. WÜNNING
Joachim G. WÜNNING
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WS Warmeprozesstechnik GmbH
Original Assignee
WS Warmeprozesstechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WS Warmeprozesstechnik GmbH filed Critical WS Warmeprozesstechnik GmbH
Publication of EP2304318A2 publication Critical patent/EP2304318A2/en
Application granted granted Critical
Publication of EP2304318B1 publication Critical patent/EP2304318B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 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 loops with the middle section, in which e.g. can form a gas recirculation flow.
  • 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 both the thermally induced change in length of Strahlungssammlungntzs as well as thermally or aging-related movements of the furnace walls compensate 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 the radiant heat pipe.
  • 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 joint bearing in such a way that the radiant heating tube can pivot slightly laterally. It pivots about a vertical pivot axis. Thus, with no deformation of the furnace walls any significant forces are exerted on the radiant heat pipe. practiced.
  • 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 Strahlungssammlungntz can be introduced into the furnace chamber.
  • the compensator is e.g. formed 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 sits in an opening of the furnace wall.
  • the compensator may be located on the outside of the wall, i. be arranged outside the furnace room or, if necessary, also within the same.
  • FIG. 2 is a Strahlungs carvingrohr the arrangement of FIG. 1 in a separate sectional schematic diagram
  • Fig. 3 shows the principle of the storage of Strahlungssammlungrohrs of FIG. 2, in schematic representation
  • Fig. 4 shows a modified embodiment of the invention in a sectional schematic representation.
  • 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 radiant heating pipes 4, 5 are each mounted on both furnace walls 2, 3, as can be seen in the example of the radiant heating pipe 5 from FIG. 2. 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.
  • Strahlungs2020rohre 4, 5, be They are also closed at one end 11, while at the other end 12 they are provided with an opening 13 to which a burner 14 is connected, and the burner 14 supplies the interior of, for example, the exhaust gas Steel sheet existing Strahlungssammlungrohrs 5 with fuel and air and lets out exhaust gases from the interior of the Strahlungs2020s 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 o- 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 th 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 extending 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, concentrically through the tube extension 18 and the central portion 6.
  • the flange 22 can pivot thanks to this storage but about a transverse to the central axis 25 hinge axis, which is perpendicular to the plane in Fig. 2. It strips the lower edge of the flange 22 and is in use. oriented zontal.
  • the flange 22 may, as needed, pivot about the vertical direction which may intersect the central axis 25 and be parallel to the plane of the drawing in FIG.
  • 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.
  • a modified compensator 26 ' is illustrated in FIG. 2a.
  • the compensator 26 ' is characterized by a corrugated end-to-end, e.g. outside smooth metal cuff formed.
  • the radiant heating tube 5 described so far is, as shown in Fig. 3, 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 spherical plain bearing 23 serves to compensate for a reorientation shift between the furnace walls 2, 3 parallel to one another. 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 heating 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 in one or more holders 24, e.g. a corresponding fork are taken, 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)

Abstract

A radiant heating tube (5) comprises a tube element that has a central section (6) and at least one recirculation section (7, 8) which adjoins the central section and forms a loop (9, 10) along with the central section. A joint bearing (23) is arranged at one end (12) of the radiant heating tube, while a sliding bearing (15) is provided at the other end (11) of the radiant heating tube, opposite the joint bearing (23). A burner (14) heats the radiant heating tube (5).

Description

Strahlungsheizanordnung mit Verzugkompensation Radiant heating arrangement with delay compensation
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.For heating furnace chambers are Strahlungsheizrohre in use, 'which are internally heated by a suitable heat source such as a burner and heat up thereby. 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.
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. 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.It turns out that such sliding seats occasionally and in particular tend to jam when the Strahlungsheizrohr is very stiff. This is the case, for example, with so-called double P tubes. Clamping can cause damage to the radiant tube or its storage. Such damage can lead to gas leaks that are unacceptable. 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 Gasrezirku- lationsströmung 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 loops with the middle section, in which e.g. can form a gas recirculation flow. 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 both the thermally induced change in length of Strahlungsheizrohrs as well as thermally or aging-related movements of the furnace walls compensate 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 Strahlungs- heizrohres 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 the radiant heat pipe. 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 acting on the Strahlungsheizrohr.
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 aus- geübt .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, with no deformation of the furnace walls any significant forces are exerted on the radiant heat pipe. practiced.
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 O- fenwand, 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 e.g. formed 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 sits in an opening of the furnace wall. The compensator may be located on the outside of the wall, i. be arranged outside the furnace room or, if necessary, also within the same.
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:Further details of advantageous embodiments of the invention will become apparent from the drawing or the description. The description is on essential aspects directed the invention and other conditions. The drawing reveals more details and is complementary. Show it:
Fig. 1 einen Ofenraum mit Strahlungsheizrohren zur Beheizung desselben in geschnittener Prinzipdarstellung,1 is a furnace chamber with Strahlungsheizrohren for heating the same in a sectioned schematic representation,
Fig. 2 ein Strahlungsheizrohr der Anordnung nach Fig. 1 in gesonderter geschnittener Prinzipdarstellung,2 is a Strahlungsheizrohr the arrangement of FIG. 1 in a separate sectional schematic diagram,
Fig. 2a eine abgewandelte Ausführungsform eines Kom- pensators,2a shows a modified embodiment of a compensator,
Fig. 3 das Prinzip der Lagerung des Strahlungsheizrohrs nach Fig. 2, in Prinzipdarstellung, undFig. 3 shows the principle of the storage of Strahlungsheizrohrs of FIG. 2, in schematic representation, and
Fig. 4 eine abgewandelte Ausführungsform der Erfindung in geschnittener Prinzipdarstellung.Fig. 4 shows 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 Strahlungs- heizrohrs 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 Rezirku- lationsströmung erleichtert flammenlosen Betrieb und somit eine gleichmäßige Aufheizung der gesamten Oberfläche des Strahlungsheizrohrs 5.The radiant heating pipes 4, 5 are each mounted on both furnace walls 2, 3, as can be seen in the example of the radiant heating pipe 5 from FIG. 2. 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 They are also closed at one end 11, while at the other end 12 they are provided with an opening 13 to which a burner 14 is connected, and the burner 14 supplies the interior of, for example, the exhaust gas Steel sheet existing Strahlungsheizrohrs 5 with fuel and air and lets out exhaust gases from the interior of the Strahlungsheizrohrs 5. It can be configured to maintain a flameless oxidation or even to form a flame.The in the double P-Radungsheizrohr allowed strong recirculation flow facilitates flameless Operation and thus a uniform heating of the entire surface of the Strahlungsheizrohrs. 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 o- der 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 o- 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 sogenann- ten 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 th 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 extending 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 hori- zontal 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, concentrically through the tube extension 18 and the central portion 6. The flange 22 can pivot thanks to this storage but about a transverse to the central axis 25 hinge axis, which is perpendicular to the plane in Fig. 2. It strips the lower edge of the flange 22 and is in use. oriented zontal. In addition, the flange 22 may, as needed, pivot about the vertical direction which may intersect the central axis 25 and be parallel to the plane of the drawing in FIG.
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. A modified compensator 26 'is illustrated in FIG. 2a. The compensator 26 'is characterized by a corrugated end-to-end, e.g. outside smooth metal cuff formed.
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 ReIa- tiwerschiebung 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 shown in Fig. 3, 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. On the other hand, the spherical plain bearing 23 serves to compensate for a reorientation shift between the furnace walls 2, 3 parallel to one another. 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 Ausführungs- form 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 o- der 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 heating tube 5 according to the invention. Reference is made to the above description on the basis of the same reference numbers. 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 in one or more holders 24, e.g. a corresponding fork are taken, 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
1 Ofenraum1 oven room
2, 3 Ofenwände2, 3 furnace walls
4, 5 Strahlungsheizrohr4, 5 radiant heating tube
6 Mittelabschnitt6 middle section
I1 8 RückführungsabschnitteI 1 8 return sections
9, 10 Schleifen9, 10 loops
11, 12 Enden11, 12 ends
13 Öffnung13 opening
14 Brenner14 burners
15 Schiebelager15 sliding bearings
16 Buchse16 socket
17 Zapfen17 cones
18 Rohrfortsatz18 pipe extension
19 Öffnung 0 Strahlungsheizrohrkästen19 Opening 0 Radiant heating tube boxes
21 Durchgangsöffnung21 passage opening
22 _ Flansch 3 Gelenklager 4 Träger 5 Mittelachse 6 Kompensator 22 _ Flange 3 Spherical plain bearing 4 Beam 5 Center axis 6 Compensator

Claims

Ansprüche : Claims :
1. Strahlungsheizrohr (5)1. radiant heating tube (5)
mit einem Rohrkörper, der einen Mittelabschnitt (6) und wenigstens einen neben dem Mittelabschnitt (6) angeordneten Rückführungsabschnitt (7, 8) aufweist, der mit dem Mittelabschnitt (6) eine Schleife (9, 10) bildet,a tube body having a central portion (6) and at least one return portion (7, 8) located adjacent to the central portion (6) and forming a loop (9, 10) with the central portion (6),
mit einem an einem Ende (12) des Strahlungsheizrohrs (5) angeordneten Gelenklager (23),with a joint bearing (23) arranged at one end (12) of the radiant heating tube (5),
mit einem Schiebelager (15) , das dem Gelenklager (23) gegenüberliegend an dem anderen Ende (11) des Strahlungsheizrohrs (5) angeordnet ist, undwith a sliding bearing (15), which is the joint bearing (23) opposite to the other end (11) of the Strahlungsheizrohrs (5) is arranged, and
mit einem Brenner (14) zur Beheizung des Strahlungsheizrohrs (5) .with a burner (14) for heating the Strahlungsheizrohrs (5).
2. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass der Rohrkörper an seinem mit dem Schiebelager (15) versehenen Ende (11) geschlossen ist.2. Strahlungsheizrohr according to claim 1, characterized in that the tubular body is closed at its end provided with the sliding bearing (15) end (11).
3. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass insgesamt mindestens zwei Rückführungsabschnitte (7, 8) vorgesehen sind, die mit dem Mittelabschnitt- (6) jeweils eine Schleife (9, 10) bilden.3. Radiant heating tube according to claim 1, characterized in that a total of at least two return sections (7, 8) are provided, which each form a loop (9, 10) with the Mittelabschnitt- (6).
4. Strahlungsheizrohr nach Anspruch 3, dadurch gekennzeichnet, dass sich die Rückführungsabschnitte (7, 8) parallel zu dem Mittelabschnitt (6) erstrecken. 4. Radiant heating tube according to claim 3, characterized in that the return sections (7, 8) extend parallel to the central portion (6).
5. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass der Mittelabschnitt (6) und der Rückführungsabschnitt (7, 8) aus Stahlblech oder Stahlguß bestehen.5. Strahlungsheizrohr according to claim 1, characterized in that the central portion (6) and the return section (7, 8) made of sheet steel or cast steel.
6. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Gelenklager (23) mindestens eine Schwenkachse festlegt .6. Strahlungsheizrohr according to claim 1, characterized in that the joint bearing (23) defines at least one pivot axis.
7. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Gelenklager (23) eine horizontal orientierte Schwenkachse festlegt .7. Strahlungsheizrohr according to claim 1, characterized in that the joint bearing (23) defines a horizontally oriented pivot axis.
8. Stfahlungsheizrohr nach Anspruch 7, dadurch gekennzeichnet, dass die Schwenkachse die Mittelachse (25) des Mittelabschnitts (6) nicht schneidet, dabei aber quer zu dieser verläuft .8. Stifahlungsheizrohr according to claim 7, characterized in that the pivot axis, the central axis (25) of the central portion (6) does not intersect, but runs transversely to this.
9. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Schwenklager (23) unterhalb eines Brenneranschlusses (22) des Strahlungsheizrohrs (5) angeordnet ist.9. Strahlungsheizrohr according to claim 1, characterized in that the pivot bearing (23) below a burner port (22) of the Strahlungsheizrohrs (5) is arranged.
10. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Schwenklager (23) außerhalb eines Ofenraums (1) angeordnet ist, der von dem Strahlungsheizrohr (5) beheizbar ist.10. Strahlungsheizrohr according to claim 1, characterized in that the pivot bearing (23) outside a furnace chamber (1) is arranged, which is heated by the Strahlungsheizrohr (5).
11. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass sich das Strahlungsheizrohr (5) zwischen zwei Ofenwänden (2, 3) erstreckt, wobei ein zu dem Schiebelager (15) gehöriges Widerlager (16) an einer Ofenwand (3) und das Gelenklager (23) an einer gegenüberliegenden Ofenwand (2) angeordnet ist. 11. Strahlungsheizrohr according to claim 1, characterized in that the Strahlungsheizrohr (5) between two furnace walls (2, 3), wherein one of the sliding bearing (15) associated abutment (16) on a furnace wall (3) and the spherical plain bearing ( 23) is arranged on an opposite furnace wall (2).
12. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Gelenklager (23) außerhalb eines von dem Strahlungsheizrohr (5) beheizten Ofenraums12. radiant heating tube according to claim 1, characterized in that the hinge bearing (23) outside of the radiant heating tube (5) heated furnace space
(1) angeordnet ist.(1) is arranged.
13. Strahlungsheizrohr nach Anspruch 11, dadurch gekennzeichnet, dass das Strahlungsheizrohr (5) die Ofenwand (2), an der das Schwenklager (23) angeordnet ist, schwenkbeweglich durchsetzt.13. Strahlungsheizrohr according to claim 11, characterized in that the Strahlungsheizrohr (5), the furnace wall (2) on which the pivot bearing (23) is arranged, passes through pivotally movable.
14. Strahlungsheizrohr nach Anspruch 13, dadurch gekennzeichnet, dass das Ende des Strahlungsheizrohres (5) in Nachbarschaft des Schwenklagers (23) gegen die Ofenwand (2) abgedichtet ist.14. Strahlungsheizrohr according to claim 13, characterized in that the end of the Strahlungsheizrohres (5) in the vicinity of the pivot bearing (23) is sealed against the furnace wall (2).
15. Strahlungsheizrohr nach Anspruch 14, dadurch gekennzeichnet, dass zur Abdichtung eine Balganordnung (26) vorgesehen ist.15. Strahlungsheizrohr according to claim 14, characterized in that for sealing a Balganordnung (26) is provided.
16. Strahlungsheizrohr nach Anspruch 1, dadurch gekennzeichnet, dass der Brenner (14) ein für die flammenlose Oxidation eingerichteter Brenner ist. 16. Strahlungsheizrohr according to claim 1, characterized in that the burner (14) is a set up for the flameless oxidation burner.
EP09772190.6A 2008-07-04 2009-07-03 Radiant heating arrangement in which distortions are compensated Active EP2304318B1 (en)

Applications Claiming Priority (2)

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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

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EP2304318A2 true EP2304318A2 (en) 2011-04-06
EP2304318B1 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)

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KR20110052547A (en) 2011-05-18
US9603199B2 (en) 2017-03-21
WO2010000490A3 (en) 2010-03-18
DE202008009065U1 (en) 2008-10-09
EP2304318B1 (en) 2017-03-08
US20110120453A1 (en) 2011-05-26
KR101548551B1 (en) 2015-09-01
CN102112809A (en) 2011-06-29
JP2011526352A (en) 2011-10-06
WO2010000490A2 (en) 2010-01-07
CN102112809B (en) 2013-09-18
JP5605580B2 (en) 2014-10-15

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