EP0536521A1 - Walking beam furnace - Google Patents

Walking beam furnace Download PDF

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Publication number
EP0536521A1
EP0536521A1 EP92114498A EP92114498A EP0536521A1 EP 0536521 A1 EP0536521 A1 EP 0536521A1 EP 92114498 A EP92114498 A EP 92114498A EP 92114498 A EP92114498 A EP 92114498A EP 0536521 A1 EP0536521 A1 EP 0536521A1
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EP
European Patent Office
Prior art keywords
walking beam
support
webs
fixed
furnace according
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Application number
EP92114498A
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German (de)
French (fr)
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EP0536521B1 (en
Inventor
Corrado Ballabene
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Techint Compagnia Tecnica Internazionale SpA
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Iritecna Per L'impiantistica Industriale E L'assetto Del Territorio Per Azioni Soc
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    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/022—Skids
    • F27D3/024—Details of skids, e.g. riders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace walking beam furnace

Definitions

  • the invention relates to a walking beam furnace with fixed beams and walking beams arranged in a housing with its longitudinal axis parallel to the feed direction.
  • Walking beam furnaces and pacemaker furnaces have long been known for conveying annealing material, in particular slabs during annealing. They are preferred for use in rolling mills because they have a more uniform heating and damage-free transport of the annealing material than e.g. B. ensure push furnaces.
  • the annealing material When transported through the furnace, the annealing material is deposited on the fixed beam for a few minutes after each stroke. On the one hand, these transport breaks allow the annealing material to remain sufficiently in the furnace and, on the other hand, the lifting beams return to their lowered starting position. Since the shape and load-bearing capacity of the lifting and fixed beams must be preserved even at high furnace temperatures, they usually consist of pipes through which coolant flows. When the annealing material remains on the cooled fixed beam, however, temperature differences of up to 150 ° C, so-called cooling shadows, occur at the contact points of the annealing material.
  • Differences in temperature of the annealing material affect the Surface quality, the dimensional accuracy and the technological properties of the annealing material, so that the rolling mill strives to reduce the inevitable temperature differences in the annealing material to below 30 ° C.
  • German Offenlegungsschrift 34 40 126 describes a continuous furnace in which the beam sections essentially having a common longitudinal axis alternately consist of fixed beam sections and walking beam sections, and the fixed beam sections following the first fixed beam section are angled laterally at their ends facing the beginning of the furnace and are guided past the adjacent walking beam sections are.
  • This known walking beam has proven itself, but still results in cooling shadows which should be reduced as much as possible in the case of particularly high demands on the quality of the finished product produced from the annealing material.
  • the invention has for its object to improve the walking beam furnace of the type mentioned in such a way that on the individual lifting and fixed beams change in the feed direction support point of the annealing material, without it being necessary, the dimensions of the fixed beams and walking beams and their Change distances in order not to have to accept restrictions on the dimensions of the annealing material to be charged.
  • a walking beam of the type mentioned that, according to the invention, supporting webs extending at an angle to the longitudinal axis are attached to the walking beam and / or the fixed beam. These supporting webs are so narrow that they only run obliquely across the width of the lifting or fixed beams, but this results in a sufficient displacement of the support points, which leads to a more uniform temperature distribution in the annealing material.
  • several successive supporting webs can be attached to a walking beam and / or fixed beam, so that there is a relatively large angle for the supporting webs and thus the support points change to a sufficiently large extent with each step.
  • Successive support webs can be at the same angle to the longitudinal axis and adjacent ends of the support webs can be offset from one another in the longitudinal axis.
  • successive support webs can have the same or different, oppositely directed angles to the longitudinal axis and can adjoin adjacent ends of the support webs.
  • both the walking beam and the fixed beam can be divided into sections in the feed direction and alternating walking beam and fixed beam sections in the longitudinal axis.
  • This arrangement allows the support points to be moved in addition to the walking achieved by the sloping supporting webs, with the alternating of the walking beam and fixed beam sections making it possible to achieve relatively large distances between the cooling shadows, which in addition are the smaller values that result from the result in inclined supporting webs, to move back and forth.
  • the lifting and fixed beams or sections can advantageously consist of cooled pipes, on the upper side of which an axial longitudinal web with lateral locking projections is welded.
  • the supporting webs can accordingly have at least at their end areas overlapping the longitudinal webs support feet, at least one of the support feet at one end area having projections underneath the locking projections.
  • the longitudinal webs thus serve to hold the supporting webs, which are secured by the extensions engaging under the locking projections.
  • each support web can also have a support foot that extends across the longitudinal webs in the center, with the longitudinal web in the region of the central support foot and / or a support foot at one end region protruding laterally, protruding into the region of the support feet, to prevent longitudinal displacement Projections can be arranged. While the locking projections are intended to prevent the supporting webs from falling or tipping over from the longitudinal webs, the further projections serve to prevent longitudinal displacement.
  • the supporting webs can therefore be placed in a simple manner on the lifting or fixed beams by first placing and displacing a somewhat inclined supporting web with a support foot at one end region such that this support foot has the corresponding locking projections engages, after which the obliquely held supporting web is lowered, so that the central support foot and / or a support foot at the other end region in the longitudinal direction is enclosed on both sides by the projections preventing the longitudinal displacement.
  • each supporting web consists of a straight part which connects the supporting feet and rests on the corresponding longitudinal web and a part which projects vertically from it, in each case obliquely from one supporting foot side at one end to the other support foot side at the other end extending support part. In this way, the supporting web is given considerable structural strength, which can carry high loads with little material.
  • each support part consists of end regions parallel to the longitudinal web in the region of the end support feet and an oblique intermediate region connecting these end regions.
  • a further measure for reducing the temperature differences in the area of the cooling shadows contributes to the fact that the lifting and fixed beams or sections have a highly heat-resistant insulation which only leaves the upper area of the supporting webs free.
  • a walking beam furnace 1 essentially consists of a fire-proof housing 2 with ceiling and side burners 3.
  • Continuous fixed beams 4 and continuous walking beams 5 are shown in the upper half of FIG. 1. Both are supported on the furnace floor with uprights (not shown). With regard to these details and the drive of the walking beam 4, reference is made to German Offenlegungsschrift 34 40 126.
  • Fig. 1 fixed and walking beams are shown, which are divided into fixed beam sections 6 to 9 and walking beam sections 10 to 13. These sections 6 to 9 and 10 to 13 become shorter towards the end of the furnace, so that the points of contact change more frequently in the direction of transport.
  • the fixed beam sections 7, 8, 9 following the first fixed beam section 6 are cranked on one side, so that their end facing the beginning of the furnace laterally passes the adjacent walking beam sections 10, 11, 12 and so the freedom of movement of the walking beam sections 10 to 13 and the full load capacity of the fixed beam sections 6 to 9 is guaranteed.
  • the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 alternate with one another in the feed direction in the longitudinal axis.
  • the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 are alternately arranged in the longitudinal axis, an additional compensation of the temperature difference is achieved, since the annealing material rests on the walking beam sections 10 to 13 only during transport, on the fixed beam sections 6 to 9 lingers for a long time.
  • the angle of the supporting webs 14 to the longitudinal axis can in each case be the same and the same direction, it may be necessary for structural reasons when arranging the supporting webs 14 on the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 some consecutive support webs 14 provide the same or different, but opposite angle to the longitudinal axis, so that adjacent ends of the support webs 14 in this Bump area together.
  • the fixed beams 4, the walking beams 5 and the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 consist of horizontal, cooled tubes 15, on the upper side of which an axial longitudinal web 16 is welded.
  • This axial longitudinal web 16 serves as a holder for the supporting webs 14.
  • Latching projections 17, 18 are welded to the axial longitudinal webs 16 at regular intervals.
  • the supporting webs 14 have support feet 19, 21 in the end regions and a further support foot 20 approximately in the middle. These support feet 19 to 21 overlap the longitudinal web 16, the support foot 19 having lower, lateral extensions 22 which engage under the locking projections 17.
  • the locking projections 18 are arranged in the region of the central support foot 20 and are in each case on opposite sides of this support foot 20.
  • the locking projections 17 serve to prevent lifting of the supporting web 14 from the longitudinal web 16, while the locking projections 18 block a longitudinal displacement of the supporting web 14.
  • a support web 14 can be placed obliquely with its support foot 19 over the longitudinal web 16 so that it engages over it and can be moved axially until the lateral locking projections 17 are gripped by the extensions 22. If the support web 14 is now completely lowered onto the longitudinal web 16, the support foot 20 reaches the area between the latching projections 18 and is thereby axially fixed. The supporting web 14 is now secured against axial displacement as well as against falling and tipping over from the longitudinal web 16.
  • Each support web 14 has a straight part 23 resting on the longitudinal web 16, which connects the support feet 19, 20, 21 to one another.
  • the end regions 25, 26 and the intermediate region 27 form the support part 24 on the support web 14.
  • the distance between the end region 25 and the end region 26 is approximately in the order of magnitude of the diameter of the cooled tube 15, so that due to the oblique course of the supporting part 24 of the supporting webs 14 there is no increase in the dimensions of the fixed beams 4 and walking beams 5 or 5 the fixed beam sections 6 to 9 and walking beam sections 10 to 13 enter.
  • the cooling tube 15 can be coated with a highly heat-resistant insulation 28, from which only the supporting part 24 of the supporting webs 14 protrudes, so that the tubes 15 are not excessively heated and the annealing material is cooled only in the area of the bearing surface on the supporting parts 24. This also helps to reduce the temperature difference in the cooling shadow of the annealing material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

Walking beam furnace with fixed beams (4, 6, 7, 8, 9) arranged with their longitudinal axis parallel to the advance direction, with walking beams (5, 10, 11, 12, 13) arranged with their longitudinal axis parallel to the advance direction and to the fixed beams, and support webs (14) fastened on the walking beams and/or the fixed beams and running at an angle to the longitudinal axis. <IMAGE>

Description

Die Erfindung betrifft einen Hubbalkenofen mit in einem Gehäuse mit ihrer Längsachse parallel zur Vorschubrichtung angeordneten Festbalken und Hubbalken.The invention relates to a walking beam furnace with fixed beams and walking beams arranged in a housing with its longitudinal axis parallel to the feed direction.

Zum Befördern von Glühgut, insbesondere Brammen während des Glühens sind Hubbalkenöfen und Schrittmacheröfen seit langem bekannt. Sie werden in Walzwerken bevorzugt verwendet, weil sie ein gleichmäßigeres Durchwärmen und beschädigungsfreieres Transportieren des Glühgutes als z. B. Stoßöfen gewährleisten.Walking beam furnaces and pacemaker furnaces have long been known for conveying annealing material, in particular slabs during annealing. They are preferred for use in rolling mills because they have a more uniform heating and damage-free transport of the annealing material than e.g. B. ensure push furnaces.

Beim Transport durch den Ofen wird das Glühgut nach jedem Hub von dem Hubbalken für einige Minuten auf den Festbalken abgesetzt. Diese Transportpausen ermöglichen einerseits ein ausreichendes Verweilen des Glühguts im Ofen und andererseits die Rückkehr der Hubbalken in ihre abgesenkte Ausgangsstellung. Da auch bei hoher Ofentemperatur die Form und die Tragfähigkeit der Hub- und der Festbalken erhalten bleiben muß, bestehen sie meist aus von Kühlmittel durchströmten Rohren. Beim Verweilen des Glühguts auf den gekühlten Festbalken entstehen jedoch an den Berührungsstellen des Glühguts Temperaturunterschiede bis etwa 150° C, sogenannte Kühlschatten.When transported through the furnace, the annealing material is deposited on the fixed beam for a few minutes after each stroke. On the one hand, these transport breaks allow the annealing material to remain sufficiently in the furnace and, on the other hand, the lifting beams return to their lowered starting position. Since the shape and load-bearing capacity of the lifting and fixed beams must be preserved even at high furnace temperatures, they usually consist of pipes through which coolant flows. When the annealing material remains on the cooled fixed beam, however, temperature differences of up to 150 ° C, so-called cooling shadows, occur at the contact points of the annealing material.

Temperaturunterschiede des Glühguts beeinträchtigen die Oberflächengüte, die Maßhaltigkeit und die technologischen Eigenschaften des Glühguts, so daß der Walzwerker eine Verminderung der unvermeidlichen Temperaturunterschiede im Glühgut auf unter 30° C anstrebt.Differences in temperature of the annealing material affect the Surface quality, the dimensional accuracy and the technological properties of the annealing material, so that the rolling mill strives to reduce the inevitable temperature differences in the annealing material to below 30 ° C.

In der deutschen Offenlegungsschrift 34 40 126 ist ein Durchlaufofen beschrieben, bei dem die im wesentlichen eine gemeinsame Längsachse aufweisenden Balkenabschnitte abwechselnd aus Festbalkenabschnitten und Hubbalkenabschnitten bestehen und die auf den ersten Festbalkenabschnitt folgenden Festbalkenabschnitte an ihren dem Ofenanfang zugekehrten Enden seitlich abgewinkelt sowie an den benachbarten Hubbalkenabschnitten vorbeigeführt sind.German Offenlegungsschrift 34 40 126 describes a continuous furnace in which the beam sections essentially having a common longitudinal axis alternately consist of fixed beam sections and walking beam sections, and the fixed beam sections following the first fixed beam section are angled laterally at their ends facing the beginning of the furnace and are guided past the adjacent walking beam sections are.

Bei diesem Hubbalkenofen lassen sich sich in Vorschubrichtung ändernde Auflagestellen des Glühguts auf den Hub- und Festbalken schaffen, wobei dieselben Abmessungen wie ein Hubbalkenofen mit in Vorschubrichtung jeweils durchgehenden Festbalken und Hubbalken eingehalten werden, ohne Einschränkungen der zu chargierenden Glühgutabmessungen in Kauf nehmen zu müssen.With this walking beam furnace, support points of the annealing material that change in the feed direction can be created on the lifting and fixed beams, whereby the same dimensions as a walking beam furnace with fixed beams and walking beams that are continuous in the feed direction can be maintained without having to accept the limitations of the annealing material dimensions to be charged.

Dieser bekannte Hubbalken hat sich bewährt, ergibt jedoch immer noch Kühlschatten, die bei besonders hohen Anforderungen an die Qualität des aus dem Glühgut hergestellten Fertigprodukts möglichst vermindert werden sollen.This known walking beam has proven itself, but still results in cooling shadows which should be reduced as much as possible in the case of particularly high demands on the quality of the finished product produced from the annealing material.

Dementsprechend liegt der Erfindung die Aufgabe zugrunde, den Hubbalkenofen der eingangs erwähnten Art dahingehend zu verbessern, daß sich auf den einzelnen Hub- und Festbalken sich in Vorschubrichtung ändernde Auflagestelle des Glühguts ergeben, ohne daß es notwendig ist, die Abmessungen der Festbalken und Hubbalken und deren Abstände zu ändern, um keine Einschränkungen der zu chargierenden Glühgutabmessungen in Kauf nehmen zu müssen.Accordingly, the invention has for its object to improve the walking beam furnace of the type mentioned in such a way that on the individual lifting and fixed beams change in the feed direction support point of the annealing material, without it being necessary, the dimensions of the fixed beams and walking beams and their Change distances in order not to have to accept restrictions on the dimensions of the annealing material to be charged.

Ausgehend von dieser Aufgabenstellung wird bei einem Hubbalken der eingangs erwähnten Art vorgeschlagen, daß erfindungsgemäß auf den Hubbalken und/oder den Festbalken unter einem Winkel zur Längsachse verlaufende Tragstege befestigt sind. Diese Tragstege sind so schmal, daß sie nur über die Breite der Hub- bzw. Festbalken schräg verlaufen, wodurch jedoch eine ausreichende Verlagerung der Auflagestellen erreicht wird, die zu einer gleichmäßigeren Temperaturverteilung in dem Glühgut führt.Based on this task, it is proposed in a walking beam of the type mentioned that, according to the invention, supporting webs extending at an angle to the longitudinal axis are attached to the walking beam and / or the fixed beam. These supporting webs are so narrow that they only run obliquely across the width of the lifting or fixed beams, but this results in a sufficient displacement of the support points, which leads to a more uniform temperature distribution in the annealing material.

Vorzugsweise können mehrere aufeinanderfolgende Tragstege auf einen Hubbalken und/oder Festbalken befestigt sein, so daß sich ein relativ großer Winkel für die Tragstege ergibt und sich somit die Auflagestellen bei jedem Schritt in einem ausreichend großen Maße verändern.Preferably, several successive supporting webs can be attached to a walking beam and / or fixed beam, so that there is a relatively large angle for the supporting webs and thus the support points change to a sufficiently large extent with each step.

Aufeinanderfolgende Tragstege können den gleichen Winkel zur Längsachse einnehmen und benachbarte Enden der Tragstege können in der Längsachse gegeneinander versetzt sein.Successive support webs can be at the same angle to the longitudinal axis and adjacent ends of the support webs can be offset from one another in the longitudinal axis.

Ebenso können aufeinanderfolgende Tragstege den gleichen oder unterschiedliche, entgegengesetzt gerichtete Winkel zur Längsachse einnehmen und können benachbarte Enden der Tragstege aneinanderstoßen.Likewise, successive support webs can have the same or different, oppositely directed angles to the longitudinal axis and can adjoin adjacent ends of the support webs.

Vorzugsweise können sowohl die Hubbalken als auch die Festbalken in Vorschubrichtung in Abschnitte unterteilt sein und sich in der Längsachse Hubbalken- und Festbalkenabschnitte miteinander abwechseln. Durch diese Anordnung wird ein Wandern der Auflagestellen zusätzlich zu dem durch die schräg verlaufenden Tragstege erreichten Wandern bewerkstelligt, wobei durch das Abwechseln der Hubbalken- und Festbalkenabschnitte verhältnismäßig große Abstände zwischen den Kühlschatten erreichbar sind, die dazu noch um die kleineren Werte, die sich aufgrund der schräg verlaufenden Tragstege ergeben, hin- und herwandern.Preferably, both the walking beam and the fixed beam can be divided into sections in the feed direction and alternating walking beam and fixed beam sections in the longitudinal axis. This arrangement allows the support points to be moved in addition to the walking achieved by the sloping supporting webs, with the alternating of the walking beam and fixed beam sections making it possible to achieve relatively large distances between the cooling shadows, which in addition are the smaller values that result from the result in inclined supporting webs, to move back and forth.

Ebenso wie auf den durchgehenden Hubbalken und Festbalken können auch auf den Hubbalken- und/oder Festbalkenabschnitten mehrere aufeinanderfolgende Tragstege angeordnet sein.Just as on the continuous walking beam and fixed beam, several successive supporting webs can also be arranged on the walking beam and / or fixed beam sections.

Die Hub- und Festbalken bzw. -abschnitte können vorteilhafterweise aus gekühlten Rohren bestehen, auf deren Oberseite ein axialer Längssteg mit seitlichen Rastvorsprüngen aufgeschweißt ist. Die Tragstege können entsprechend wenigstens an ihren Endbereichen die Längsstege übergreifende Auflagefüße aufweisen, wobei wenigstens einer der Auflagefüße an einem Endbereich die Rastvorsprünge untergreifende Fortsätze aufweist.The lifting and fixed beams or sections can advantageously consist of cooled pipes, on the upper side of which an axial longitudinal web with lateral locking projections is welded. The supporting webs can accordingly have at least at their end areas overlapping the longitudinal webs support feet, at least one of the support feet at one end area having projections underneath the locking projections.

Die Längsstege dienen somit zum Halten der Tragstege, die durch die die Rastvorsprünge untergreifenden Fortsätze gesichert werden.The longitudinal webs thus serve to hold the supporting webs, which are secured by the extensions engaging under the locking projections.

Zusätzlich zu den Auflagefüßen an den Endbereichen kann jeder Tragsteg noch mittig einen die Längsstege übergreifenden Auflagefuß aufweisen, wobei am Längssteg im Bereich des mittigen Auflagefußes und/oder eines Auflagefußes an einem Endbereich seitliche, in den Bereich des bzw. der Auflagefüße vorstehende, eine Längsverschiebung verhindernde Vorsprünge angeordnet sein können. Während die Rastvorsprünge verhindern sollen, daß die Tragstege von den Längsstegen herunterfallen oder abkippen, dienen die weiteren Vorsprünge dazu, eine Längsverschiebung zu verhindern. Die Tragstege lassen sich daher in einfacher Weise auf die Hub- oder Festbalken dadurch aufsetzen, daß zunächst ein etwas schräg gestellter Tragsteg mit einem Auflagefuß an einem Endbereich so aufgesetzt und verschoben wird, daß dieser Auflagefuß die entsprechenden Rastvorsprünge untergreift, wonach der schräg gehaltene Tragsteg abgesenkt wird, so daß der mittlere Auflagefuß und/oder ein Auflagefuß am anderen Endbereich in Längsrichtung beidseitig von den die Längsverschiebung verhindernden Vorsprüngen eingeschlossen ist.In addition to the support feet at the end regions, each support web can also have a support foot that extends across the longitudinal webs in the center, with the longitudinal web in the region of the central support foot and / or a support foot at one end region protruding laterally, protruding into the region of the support feet, to prevent longitudinal displacement Projections can be arranged. While the locking projections are intended to prevent the supporting webs from falling or tipping over from the longitudinal webs, the further projections serve to prevent longitudinal displacement. The supporting webs can therefore be placed in a simple manner on the lifting or fixed beams by first placing and displacing a somewhat inclined supporting web with a support foot at one end region such that this support foot has the corresponding locking projections engages, after which the obliquely held supporting web is lowered, so that the central support foot and / or a support foot at the other end region in the longitudinal direction is enclosed on both sides by the projections preventing the longitudinal displacement.

Da die Tragstege wegen des hohen Gewichts des Glühguts eine erhebliche mechanische Festigkeit aufweisen müssen, ist es vorteilhaft, daß jeder Tragsteg aus einem die Auflagefüße verbindenden geraden, auf dem entsprechenden Längssteg aufliegenden Teil und einem davon senkrecht abstehenden, jeweils schräg von einer Auflagefußseite an einem Ende zur anderen Auflagefußseite am anderen Ende verlaufenden Tragteil besteht. Auf diese Weise erhält der Tragsteg eine erhebliche Gestaltfestigkeit, die bei geringem Materialaufwand hohe Lasten tragen kann.Since the supporting webs must have a considerable mechanical strength because of the high weight of the annealing material, it is advantageous that each supporting web consists of a straight part which connects the supporting feet and rests on the corresponding longitudinal web and a part which projects vertically from it, in each case obliquely from one supporting foot side at one end to the other support foot side at the other end extending support part. In this way, the supporting web is given considerable structural strength, which can carry high loads with little material.

Zu dieser Gestaltfestigkeit trägt des weiteren bei, daß jedes Tragteil aus im Bereich der endseitigen Auflagefüße zu dem Längssteg parallelen Endbereichen und einem diese Endbereiche verbindenden, schräg verlaufenden Zwischenbereich besteht.This structural strength is further enhanced by the fact that each support part consists of end regions parallel to the longitudinal web in the region of the end support feet and an oblique intermediate region connecting these end regions.

Eine weitere Maßnahme zum Vermindern der Temperaturunterschiede im Bereich der Kühlschatten trägt dazu bei, daß die Hub- und Festbalken bzw. -abschnitte eine nur den oberen Bereich der Tragstege freilassende, hochhitzebeständige Isolierung aufweisen.A further measure for reducing the temperature differences in the area of the cooling shadows contributes to the fact that the lifting and fixed beams or sections have a highly heat-resistant insulation which only leaves the upper area of the supporting webs free.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert. In der Zeichnung zeigen:

Fig. 1
eine Draufsicht eines erfindungsgemäßen Hubbalkenofens,
Fig. 2
eine Draufsicht auf einen erfindungsgemäßen Tragsteg,
Fig. 3
eine Seitenansicht eines erfindungsgemäßen Tragstegs und eines diesen tragenden Rohres,
Fig. 4
einen Querschnitt entlang der Linie IV - IV in Fig. 3,
Fig. 5
einen Querschnitt entlang der Linie V - V in Fig. 3 und
Fig. 6
einen Querschnitt entlang der Linie VI - VI in Fig. 3.
The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows:
Fig. 1
a plan view of a walking beam furnace according to the invention,
Fig. 2
a plan view of a supporting web according to the invention,
Fig. 3
2 shows a side view of a supporting web according to the invention and a tube carrying it,
Fig. 4
3 shows a cross section along the line IV-IV in FIG. 3,
Fig. 5
a cross section along the line V - V in Fig. 3 and
Fig. 6
3 shows a cross section along the line VI-VI in FIG. 3.

Ein Hubbalkenofen 1 besteht im wesentlichen aus einem feuerfesten Gehäuse 2 mit Decken- und Seitenbrennern 3.A walking beam furnace 1 essentially consists of a fire-proof housing 2 with ceiling and side burners 3.

In der oberen Hälfte von Fig. 1 sind durchlaufende Festbalken 4 und durchlaufende Hubbalken 5 dargestellt. Beide stützen sich mit nicht dargestellten Stehern auf dem Ofenboden ab. Bezüglich dieser Einzelheiten und des Antriebs der Hubbalken 4 wird auf die deutsche Offenlegungsschrift 34 40 126 verwiesen.Continuous fixed beams 4 and continuous walking beams 5 are shown in the upper half of FIG. 1. Both are supported on the furnace floor with uprights (not shown). With regard to these details and the drive of the walking beam 4, reference is made to German Offenlegungsschrift 34 40 126.

In der unteren Hälfte der Fig. 1 sind Fest- und Hubbalken dargestellt, die in Festbalkenabschnitte 6 bis 9 und Hubbalkenabschnitte 10 bis 13 unterteilt sind. Diese Abschnitte 6 bis 9 und 10 bis 13 werden zum Ofenende hin kürzer, damit in Transportrichtung ein häufigeres Wechseln der Berührungsstellen erfolgt.In the lower half of Fig. 1 fixed and walking beams are shown, which are divided into fixed beam sections 6 to 9 and walking beam sections 10 to 13. These sections 6 to 9 and 10 to 13 become shorter towards the end of the furnace, so that the points of contact change more frequently in the direction of transport.

Die auf den ersten Festbalkenabschnitt 6 folgenden Festbalkenabschnitte 7, 8, 9 sind einseitig gekröpft, damit ihr dem Ofenanfang zugekehrtes Ende seitlich an den benachbarten Hubbalkenabschnitten 10, 11, 12 vorbeiführt und so die Bewegungsfreiheit der Hubbalkenabschnitte 10 bis 13 und die volle Tragfähigkeit der Festbalkenabschnitte 6 bis 9 gewährleistet ist.The fixed beam sections 7, 8, 9 following the first fixed beam section 6 are cranked on one side, so that their end facing the beginning of the furnace laterally passes the adjacent walking beam sections 10, 11, 12 and so the freedom of movement of the walking beam sections 10 to 13 and the full load capacity of the fixed beam sections 6 to 9 is guaranteed.

Die Festbalkenabschnitte 6 bis 9 und die Hubbalkenabschnitte 10 bis 13 wechseln sich in Vorschubrichtung in der Längsachse miteinander ab.The fixed beam sections 6 to 9 and the walking beam sections 10 to 13 alternate with one another in the feed direction in the longitudinal axis.

Sowohl auf den durchgehenden Festbalken 4 und Hubbalken 5 als auch auf den Festbalkenabschnitten 6 bis 9 und Hubbalkenabschnitten 10 bis 13 sind schräg verlaufende Tragstege 14 angeordnet. Durch diese schräg verlaufenden Tragstege wird bereits bei den durchgehenden Festbalken 4 und den dazu parallelen Hubbalken 5 ein ständiges Wandern der Auflagepunkte des Glühguts beim Transport durch den Hubbalkenofen 1 erreicht, so daß der Temperaturunterschied im Bereich der Kühlschatten erheblich verringert wird.Both on the continuous fixed beam 4 and walking beam 5 as well as on the fixed beam sections 6 to 9 and walking beam sections 10 to 13, obliquely extending supporting webs 14 are arranged. Due to these inclined supporting webs a constant migration of the support points of the annealing material during transport through the walking beam furnace 1 is already achieved with the continuous fixed beams 4 and the parallel walking beams 5, so that the temperature difference in the area of the cooling shadows is considerably reduced.

Werden dazu noch die Festbalkenabschnitte 6 bis 9 und die Hubbalkenabschnitte 10 bis 13 in der Längsachse jeweils abwechselnd angeordnet, wird ein zusätzlicher Ausgleich des Temperaturunterschieds erreicht, da das Glühgut auf den Hubbalkenabschnitten 10 bis 13 jeweils nur während des Transports aufliegt, auf den Festbalkenabschnitten 6 bis 9 jedoch längere Zeit verweilt.If, in addition, the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 are alternately arranged in the longitudinal axis, an additional compensation of the temperature difference is achieved, since the annealing material rests on the walking beam sections 10 to 13 only during transport, on the fixed beam sections 6 to 9 lingers for a long time.

Während bei durchgehenden Festbalken 4 und Hubbalken 5 der Winkel der Tragstege 14 zur Längsachse jeweils gleich und gleich gerichtet sein kann, kann es bei der Anordnung der Tragstege 14 auf den Festbalkenabschnitten 6 bis 9 und den Hubbalkenabschnitten 10 bis 13 aus baulichen Gründen erforderlich sein, bei einigen aufeinanderfolgenden Tragstegen 14 den gleichen oder ungleichen, aber entgegengesetzt gerichteten Winkel zur Längsachse vorzusehen, so daß benachbarte Enden der Tragstege 14 in diesem Bereich aneinanderstoßen.While in the case of continuous fixed beams 4 and walking beams 5, the angle of the supporting webs 14 to the longitudinal axis can in each case be the same and the same direction, it may be necessary for structural reasons when arranging the supporting webs 14 on the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 some consecutive support webs 14 provide the same or different, but opposite angle to the longitudinal axis, so that adjacent ends of the support webs 14 in this Bump area together.

Hinsichtlich des Temperaturausgleichs im Bereich der Kühlschatten macht dies keinen bedeutenden Unterschied.This makes no significant difference with regard to the temperature compensation in the area of the cooling shade.

Wie sich aus den Fig. 2 bis 6 ergibt, bestehen die Festbalken 4, die Hubbalken 5 bzw. die Festbalkenabschnitte 6 bis 9 und die Hubbalkenabschnitte 10 bis 13 aus waagerechten, gekühlten Rohren 15, auf deren Oberseite ein axialer Längssteg 16 aufgeschweißt ist. Dieser axiale Längssteg 16 dient als Halterung für die Tragstege 14.As can be seen from FIGS. 2 to 6, the fixed beams 4, the walking beams 5 and the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 consist of horizontal, cooled tubes 15, on the upper side of which an axial longitudinal web 16 is welded. This axial longitudinal web 16 serves as a holder for the supporting webs 14.

In regelmäßigen Abständen sind an die axialen Längsstege 16 seitliche Rastvorsprünge 17, 18 angeschweißt.Latching projections 17, 18 are welded to the axial longitudinal webs 16 at regular intervals.

Die Tragstege 14 weisen in den Endbereichen Auflagefüße 19, 21 und etwa mittig einen weiteren Auflagefuß 20 auf. Diese Auflagefüße 19 bis 21 übergreifen den Längssteg 16, wobei der Auflagefuß 19 untere, seitliche Fortsätze 22 aufweist, die die Rastvorsprünge 17 untergreifen.The supporting webs 14 have support feet 19, 21 in the end regions and a further support foot 20 approximately in the middle. These support feet 19 to 21 overlap the longitudinal web 16, the support foot 19 having lower, lateral extensions 22 which engage under the locking projections 17.

Die Rastvorsprünge 18 sind im Bereich des mittigen Auflagefußes 20 angeordnet und liegen jeweils an gegenüberliegenden Seiten dieses Auflagefußes 20 an. Somit dienen die Rastvorsprünge 17 dazu, ein Abheben des Tragstegs 14 von dem Längssteg 16 zu verhindern, während die Rastvorsprünge 18 eine Längsverschiebung des Tragstegs 14 blockieren.The locking projections 18 are arranged in the region of the central support foot 20 and are in each case on opposite sides of this support foot 20. Thus, the locking projections 17 serve to prevent lifting of the supporting web 14 from the longitudinal web 16, while the locking projections 18 block a longitudinal displacement of the supporting web 14.

Zur Montage läßt sich ein Tragsteg 14 schräg mit seinem Auflagefuß 19 so über den Längssteg 16 setzen, daß er diesen übergreift und sich axial verschieben läßt, bis die seitlichen Rastvorsprünge 17 von den Fortsätzen 22 untergriffen werden. Wird jetzt der Tragsteg 14 ganz auf den Längssteg 16 abgesenkt, gelangt der Auflagefuß 20 in den Bereich zwischen den Rastvorsprüngen 18 und wird dadurch axial festgelegt. Der Tragsteg 14 ist nunmehr sowohl gegen axiales Verschieben als auch gegen Herabfallen und Abkippen von dem Längssteg 16 gesichert.For assembly, a support web 14 can be placed obliquely with its support foot 19 over the longitudinal web 16 so that it engages over it and can be moved axially until the lateral locking projections 17 are gripped by the extensions 22. If the support web 14 is now completely lowered onto the longitudinal web 16, the support foot 20 reaches the area between the latching projections 18 and is thereby axially fixed. The supporting web 14 is now secured against axial displacement as well as against falling and tipping over from the longitudinal web 16.

Im Bereich des Auflagefußes 21 lassen sich zusätzliche, eine axiale Verschiebung verhindernde Rastvorsprünge anordnen.In the area of the support foot 21, additional locking projections preventing axial displacement can be arranged.

Jeder Tragsteg 14 weist ein gerades, auf dem Längssteg 16 aufliegendes Teil 23 auf, das die Auflagefüße 19, 20, 21 miteinander verbindet. Von einer Seite des Auflagefußes 19 und von der entgegengesetzten Seite des Auflagefußes 21 ragen parallele Endbereiche 25, 26 auf, die über einen schrägen Zwischenbereich 27 miteinander verbunden sind. Die Endbereiche 25, 26 und der Zwischenbereich 27 bilden das Tragteil 24 am Tragsteg 14.Each support web 14 has a straight part 23 resting on the longitudinal web 16, which connects the support feet 19, 20, 21 to one another. Parallel end regions 25, 26, which are connected to one another via an inclined intermediate region 27, protrude from one side of the support foot 19 and from the opposite side of the support foot 21. The end regions 25, 26 and the intermediate region 27 form the support part 24 on the support web 14.

Es ist erkennbar, daß der Abstand zwischen dem Endbereich 25 und dem Endbereich 26 etwa in der Größenordnung des Durchmessers des gekühlten Rohres 15 liegt, so daß durch den schrägen Verlauf des Tragteils 24 der Tragstege 14 keine Vergrößerung der Abmessungen der Festbalken 4 und Hubbalken 5 bzw. der Festbalkenabschnitte 6 bis 9 und Hubbalkenabschnitte 10 bis 13 eintritt.It can be seen that the distance between the end region 25 and the end region 26 is approximately in the order of magnitude of the diameter of the cooled tube 15, so that due to the oblique course of the supporting part 24 of the supporting webs 14 there is no increase in the dimensions of the fixed beams 4 and walking beams 5 or 5 the fixed beam sections 6 to 9 and walking beam sections 10 to 13 enter.

Das Kühlrohr 15 kann mit einer hochhitzebeständigen Isolierung 28 ummantelt sein, aus der nur das Tragteil 24 der Tragstege 14 herausragt, so daß die Rohre 15 nicht übermäßig aufgeheizt werden und ein Abkühlen des Glühguts nur im Bereich der Auflagefläche auf die Tragteile 24 erfolgt. Dies trägt auch dazu bei, den Temperaturunterschied in den Kühlschatten des Glühguts zu vermindern.The cooling tube 15 can be coated with a highly heat-resistant insulation 28, from which only the supporting part 24 of the supporting webs 14 protrudes, so that the tubes 15 are not excessively heated and the annealing material is cooled only in the area of the bearing surface on the supporting parts 24. This also helps to reduce the temperature difference in the cooling shadow of the annealing material.

Claims (12)

Hubbalkenofen mit - mit ihrer Längsachse parallel zur Vorschubrichtung angeordneten Festbalken (4; 6, 7, 8, 9), - mit ihrer Längsachse parallel zur Vorschubrichtung und zu den Festbalken angeordneten Hubbalken (5; 10, 11, 12, 13) und - auf den Hubbalken und/oder den Festbalken befestigten, unter einem Winkel zur Längsachse verlaufenden Tragstegen (14). Walking beam furnace with fixed bars (4; 6, 7, 8, 9) arranged parallel to the feed direction with their longitudinal axis, - With their longitudinal axis parallel to the feed direction and to the fixed beams arranged walking beams (5; 10, 11, 12, 13) and - Fixed to the walking beam and / or the fixed beam, at an angle to the longitudinal axis supporting webs (14). Hubbalkenofen nach Anspruch 1, dadurch gekennzeichnet, daß mehrere aufeinanderfolgende Tragstege (14) auf einem Hubbalken (5; 10, 11, 12, 13) und/oder Festbalken (4; 6, 7, 8, 9) befestigt sind.Walking beam furnace according to claim 1, characterized in that a plurality of successive supporting webs (14) are attached to a walking beam (5; 10, 11, 12, 13) and / or fixed beam (4; 6, 7, 8, 9). Hubbalkenofen nach Anspruch 2, dadurch gekennzeichnet, daß die aufeinanderfolgenden Tragstege (14) den gleichen Winkel zur Längsachse einnehmen und benachbarte Enden der Tragstege (14) in der Längsachse gegeneinander versetzt sind.Walking beam furnace according to claim 2, characterized in that the successive supporting webs (14) are at the same angle to the longitudinal axis and adjacent ends of the supporting webs (14) are offset with respect to one another in the longitudinal axis. Hubbalkenofen nach Anspruch 2, dadurch gekennzeichnet, daß die aufeinanderfolgenden Tragstege (14) den gleichen aber entgegengesetzt gerichteten Winkel zur Längsachse einnehmen und benachbarte Enden der Tragstege aneinanderstoßen.Walking beam furnace according to claim 2, characterized in that the successive support webs (14) take the same but opposite angle to the longitudinal axis and abut adjacent ends of the support webs. Hubbalkenofen nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sowohl die Hubbalken als auch die Festbalken in Vorschubrichtung in Abschnitte (6, 7, 8, 9; 10, 11, 12, 13) unterteilt sind und sich in der Längsachse Hubbalken- und Festbalkenabschnitte miteinander abwechseln.Walking beam furnace according to one or more of claims 1 to 4, characterized in that both the walking beams and the fixed beams are divided into sections (6, 7, 8, 9; 10, 11, 12, 13) in the feed direction and are in the longitudinal axis Alternate the walking beam and fixed beam sections. Hubbalkenofen nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß mehrere aufeinanderfolgende Tragstege (14) auf einem Hubbalken- und/oder Festbalkenabschnitt (6, 7, 8, 9; 10, 11, 12, 13) angeordnet sind.Walking beam furnace according to one or more of claims 1 to 5, characterized in that a plurality of successive supporting webs (14) are arranged on a walking beam and / or fixed beam section (6, 7, 8, 9; 10, 11, 12, 13). Hubbalkenofen nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Hub- und Festbalken (4, 5; 6, 7, 8, 9; 10, 11, 12, 13) aus gekühlten Rohren (15) bestehen, auf die Oberseite der Rohre ein axialer Längssteg (16) mit seitlichen Rastvorsprüngen (17, 18) aufgeschweißt ist und die Tragstege wenigstens an ihren Endbereichen die Längsstege übergreifende Auflagefüße (19, 20, 21) aufweisen und wenigstens einer der Auflagefüße (19) an einem Endbereich die Rastvorsprünge untergreifende Fortsätze (22) aufweist.Walking beam furnace according to one or more of claims 1 to 5, characterized in that the lifting and fixed beams (4, 5; 6, 7, 8, 9; 10, 11, 12, 13) consist of cooled pipes (15) the top of the tubes is welded onto an axial longitudinal web (16) with lateral latching projections (17, 18) and the support webs have support feet (19, 20, 21) at least at their end areas and at least one of the support feet (19) at one end area the locking projections have engaging extensions (22). Hubbalkenofen nach Anspruch 7, dadurch gekennzeichnet, daß jeder Tragsteg (14) an den Endbereichen und mittig die Längsstege (16) übergreifende Auflagefüße (19, 20, 21) aufweist.Walking beam furnace according to claim 7, characterized in that each support web (14) has support feet (19, 20, 21) overlapping the longitudinal webs (16) at the end regions and in the center. Hubbalkenofen nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß am Längssteg (16) im Bereich des mittigen Auflagefußes (20) und/oder eines Auflagefußes (19, 21) an einem Endbereich seitliche, in den Bereich des bzw. der Auflagefüße vorstehende, eine Längsverschiebung verhindernde Vorsprünge (18) angeordnet sind.Walking beam furnace according to claim 7 or 8, characterized in that on the longitudinal web (16) in the area of the central support foot (20) and / or a support foot (19, 21) at one end area lateral projections (18) which protrude into the area of the support foot or feet and prevent longitudinal displacement are arranged. Hubbalkenofen nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß jeder Tragsteg (14) aus einem die Auflagefüße (19, 20, 21) verbindenden geraden, auf dem entsprechenden Längssteg (16) aufliegenden Teil (23) und einem davon senkrecht abstehenden, jeweils schräg von einer Auflagefußseite an einem Ende zur anderen Auflagefußseite am anderen Ende verlaufenden Tragteil (24) besteht.Walking beam furnace according to one or more of claims 1 to 9, characterized in that each support web (14) consists of a straight part (23) which connects the support feet (19, 20, 21) and lies vertically on the corresponding longitudinal web (16) protruding, each inclined from one support foot side at one end to the other support foot side at the other end extending support member (24). Hubbalkenofen nach Anspruch 10, dadurch gekennzeichnet, daß jedes Tragteil (24) aus im Bereich der randseitigen Auflagefüße (19, 21) zu dem Längssteg (16) parallelen Endbereichen (25, 26) und einem diese Endbereiche verbindenden, schräg verlaufenden Zwischenbereich (27) besteht.Walking beam furnace according to claim 10, characterized in that each supporting part (24) consists of end regions (25, 26) parallel to the longitudinal web (16) in the region of the support feet (19, 21) and an inclined intermediate region (27) connecting these end regions. consists. Hubbalkenofen nach einem oder mehreren der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Hub- und Festbalken (4, 5; 6, 7, 8, 9; 10, 11, 12, 13) und das aufliegende Teil (23) eine nur den oberen Bereich der Tragstege (14) freilassende, hochhitzebeständige Isolierung (27) aufweisen.Walking beam furnace according to one or more of claims 1 to 11, characterized in that the lifting and fixed beams (4, 5; 6, 7, 8, 9; 10, 11, 12, 13) and the overlying part (23) only one the high area of the support webs (14) leaving exposed, highly heat-resistant insulation (27).
EP19920114498 1991-10-11 1992-08-26 Walking beam furnace Expired - Lifetime EP0536521B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4133698 1991-10-11
DE19914133698 DE4133698A1 (en) 1991-10-11 1991-10-11 RIFLE BAR OVEN

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EP0660061A1 (en) * 1993-12-21 1995-06-28 TECHINT ITALIMPIANTI DEUTSCHLAND GmbH Walking beam furnace

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DE102018129446B4 (en) * 2018-11-22 2024-03-14 Saint-Gobain Industriekeramik Rödental GmbH Beam for beam conveyor furnace

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FR585475A (en) * 1924-09-06 1925-03-02 Friedrich Siemens A G Water-cooled sliding rail for reheating ovens
DE3434356A1 (en) * 1984-09-19 1985-02-21 Engels, Paul, 4030 Ratingen ADAPTERS FOR REFRIGERATED PIPES
FR2569262A1 (en) * 1984-08-17 1986-02-21 Stein Heurtey MOBILE LONGERONS OVEN FOR HEATING OF STEEL PRODUCTS
EP0183955A2 (en) * 1984-11-02 1986-06-11 ITALIMPIANTI Società Italiana Impianti p.a. Walking-beam furnace
DE8901064U1 (en) * 1989-02-01 1989-04-20 Reining Heisskuehlung Gmbh & Co. Kg, 4330 Muelheim, De

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR585475A (en) * 1924-09-06 1925-03-02 Friedrich Siemens A G Water-cooled sliding rail for reheating ovens
FR2569262A1 (en) * 1984-08-17 1986-02-21 Stein Heurtey MOBILE LONGERONS OVEN FOR HEATING OF STEEL PRODUCTS
DE3434356A1 (en) * 1984-09-19 1985-02-21 Engels, Paul, 4030 Ratingen ADAPTERS FOR REFRIGERATED PIPES
WO1986001884A1 (en) * 1984-09-19 1986-03-27 Ruhrgas Aktiengesellschaft Support system and carriers for heated products
EP0183955A2 (en) * 1984-11-02 1986-06-11 ITALIMPIANTI Società Italiana Impianti p.a. Walking-beam furnace
DE8901064U1 (en) * 1989-02-01 1989-04-20 Reining Heisskuehlung Gmbh & Co. Kg, 4330 Muelheim, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660061A1 (en) * 1993-12-21 1995-06-28 TECHINT ITALIMPIANTI DEUTSCHLAND GmbH Walking beam furnace

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DE4133698A1 (en) 1993-04-15
CA2077137A1 (en) 1993-04-12

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