EP0518279B1 - Heat treatment furnace for bulk materials - Google Patents

Heat treatment furnace for bulk materials Download PDF

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Publication number
EP0518279B1
EP0518279B1 EP92109728A EP92109728A EP0518279B1 EP 0518279 B1 EP0518279 B1 EP 0518279B1 EP 92109728 A EP92109728 A EP 92109728A EP 92109728 A EP92109728 A EP 92109728A EP 0518279 B1 EP0518279 B1 EP 0518279B1
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EP
European Patent Office
Prior art keywords
tube
oven
supporting
oven according
beams
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Expired - Lifetime
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EP92109728A
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German (de)
French (fr)
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EP0518279A1 (en
Inventor
Kurt Ellringmann
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.)
Maerz Ofenbau AG
Maerz Ofenbau GmbH
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Maerz Ofenbau AG
Maerz Ofenbau GmbH
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Publication of EP0518279A1 publication Critical patent/EP0518279A1/en
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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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • 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
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0036—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising inflatable or extendable parts

Definitions

  • the invention relates to a furnace for the heat treatment of lumpy goods, for example sheet metal, with a transport device for passing the goods to be heated through the furnace.
  • This transport device has two groups of longitudinal beams bearing the goods, which are alternately spaced apart and from which at least one beam group in a higher position than the other beam group can advance a section of the transport path through the furnace and then in a lower position than this other Bar group can be moved back to its starting position.
  • a supporting structure which is movable with it and which has at least one vertical side surface which extends continuously over the entire length of the supporting structure and which faces the supporting structure of the adjacent longitudinal beam.
  • the water channels in the known stoves are composed of individual longitudinal sections for structural reasons, which are provided on their abutting front ends with outwardly projecting flanges, which are arranged with sealing strips between them are bolted in order to achieve a firm and liquid-tight connection of the longitudinal shots placed next to each other.
  • the piece goods to be treated in the furnace must be supported on at least two longitudinal beams per bar group and that sheet-like piece goods should not or only slightly protrude laterally on its edge for reasons of support
  • the smallest possible center-to-center distance between the neighboring walking beams of the two groups of beams are desirable.
  • the invention is therefore based on the object to reduce the center distance of the longitudinal beams in a furnace of the type mentioned, without the effectiveness of endanger the gas-tight seal of the floor.
  • This is achieved according to the invention in that, in this furnace, between two adjacent supporting structures of the longitudinal beams, a hose is also provided, which extends over the entire length of the supporting structures and which closely clings to the vertical side surface of at least one of the adjacent supporting structures.
  • the tube can be expanded in cross-section by filling with a pneumatic or hydraulic pressure medium and can thus be pressed against the side surface in such a way that a good seal against air flowing into the interior of the furnace results over the entire length of the furnace.
  • the hose is mounted on one of the two adjacent support structures, namely on brackets arranged on this support structure, with one side against the vertical side surface of this support structure and the other side against the vertical side surface of the adjacent one Carrying structure presses.
  • the hoses located between two support structures are not each mounted on one of these two support structures, but are arranged individually and stationary between the two support structures.
  • the relative movement between the hose and the moving vertical side surface against which the hose is pressed during operation of the transport device leads to the occurrence of a longitudinal tensile stress in the hose due to friction.
  • the floor parts can, according to the invention, be formed in each case by a plurality of layers of heat-insulating fiber mats which essentially lie against one another with their side edges.
  • the step-by-step furnace shown in the drawing has two groups of longitudinal beams 1, 2 lying next to one another in the cross section of the furnace, the beams of these two groups being alternately spaced apart.
  • These longitudinal beams 1, 2 are each supported on supports 4 of supporting structures, the main part of which consists of hollow-shaped supporting beams 6, which are connected via supports 7 to crossbars 8a and 8b which can be moved back and forth and up and down in the longitudinal direction of the furnace via a drive mechanism.
  • This support part 5 consists of a base plate fastened to the upper side of the supporting beam, on which the fiber mats are mounted, and a side wall which does not protrude up to the uppermost fiber mat on a side edge of this base plate.
  • the adjacent floor parts are in direct contact with one another with their fiber mats and the upstanding side wall, as a result of which a good insulation effect and an additional largely gas-tight closure of the stove top of the oven is ensured.
  • Every second longitudinal beam 2 has brackets 9 on its supporting structure, which protrude on both sides from the supporting beam 6 and carry hoses 11 lying on both sides of this beam, which extend over the entire length of the beam.
  • these hoses lie against the vertical side surfaces of these support beams, while on their other side surface there is a rocker 12, which also extends over the entire length of the beam and can be pivoted about axes 13 extending in the longitudinal direction of the hose.
  • these rockers On the side facing away from the hose, these rockers carry slide bars 14, which are mounted in holders 15 and can be pressed with their smooth side surface onto the vertical sides of the adjacent supporting beams 6. This pressing of the slide strips 14 takes place by widening the hoses 11 with the aid of a pneumatic or hydraulic pressure medium filled into the hoses.
  • the slide strips suitably consist of an abrasion-resistant material with a smooth surface, for example hard plastic.
  • each longitudinal beam prefferably has brackets with hoses etc. protruding on one side.

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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)
  • Tunnel Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A heat treatment furnace for bulk materials, in particular metal sheets, which has a transport device for conveying the goods to be treated through the furnace. This transport device has two groups of longitudinal beams (1, 2) which carry the materials and lie alternately at a spacing next to one another and at least one beam group of which can be moved forwards over a part length of the transport path through the furnace in a higher position than the other beam group and subsequently, in a lower position than this other beam group, be moved backwards into its starting position. Provided under each longitudinal beam is a support construction (6) which supports it and is movable with it and which has at least one side surface which extends continuously over the entire length of the support construction and which faces the support construction of the adjacent longitudinal beam. According to the invention, there is provided between the two adjacent support constructions (6) a flexible tube (11) which likewise extends over the entire length of the support constructions and which can be expanded in cross-section by filling with a pneumatic or hydraulic pressure medium and thus brought to bear closely against said side surface. <IMAGE>

Description

Die Erfindung betrifft einen Ofen für die Wärmebehandlung von stückigem Gut, z.B. Blechen, mit einer Transportvorrichtung zum Hindurchführen des zu wärmenden Gutes durch den Ofen. Diese Transportvorrichtung weist zwei das Gut tragende Gruppen von Längsbalken auf, welche abwechselnd im Abstand nebeneinander liegen und von welchen mindestens eine Balkengruppe in einer höheren Lage als die andere Balkengruppe eine Teilstrecke des Transportweges durch den Ofen hindurch vorbewegbar und anschließend in einer tieferen Lage als diese andere Balkengruppe in ihre Ausgangslage zurückbewegbar ist. Unter jedem Längsbalken ist eine diesen tragende und mit ihm bewegbare Tragkonstruktion vorgesehen, die mindestens eine sich kontinuierlich über die gesamte Länge der Tragkonstruktion erstreckende senkrechte Seitenfläche hat, die der Tragkonstruktion des benachbarten Längsbalkens zugewandt ist. Um den Ofen an seinem Boden aus wärmetechnischen Gründen gasdicht abzuschließen, damit ein Einströmen von kalter Außenluft in den Ofenraum verhindert wird, sind bei den bekannten Öfen in der Regel zwischen je zwei benachbarten Tragkonstruktionen für die Längsbalken über die gesamte Lange der Tragkonstruktion sich erstreckende, nicht mit den Tragkonstruktionen bewegbare Wasserrinnen vorgesehen, in deren Wasserfüllung Tauchleisten eintauchen, die an den benachbarten Tragkonstruktionen angeordnet und mit diesen bewegbar sind. Aufgrund der relativ großen Ofenlänge und der dadurch gegebenen großen Länge der Unterkonstruktionen für die Längsbalken sind die Wasserrinnen bei den bekannten Öfen aus konstruktiven Gründen aus einzelnen Längsschüssen zusammengesetzt, die an ihren aneinanderstoßenden Stirnenden mit nach außen abstehenden Flanschen versehen sind, welche unter Zwischenanordnung von Dichtstreifen miteinander verbolzt sind, um eine feste und flüssigkeitsdichte Verbindung der aneinandergesetzten Längsschüsse zu erreichen.The invention relates to a furnace for the heat treatment of lumpy goods, for example sheet metal, with a transport device for passing the goods to be heated through the furnace. This transport device has two groups of longitudinal beams bearing the goods, which are alternately spaced apart and from which at least one beam group in a higher position than the other beam group can advance a section of the transport path through the furnace and then in a lower position than this other Bar group can be moved back to its starting position. Under each longitudinal beam there is provided a supporting structure which is movable with it and which has at least one vertical side surface which extends continuously over the entire length of the supporting structure and which faces the supporting structure of the adjacent longitudinal beam. In order to seal the furnace gas-tight on its floor for thermal reasons, so that cold outside air cannot flow into the furnace chamber, there are usually two adjacent supporting structures for the longitudinal beams over the entire length of the supporting structure in the known furnaces extending water channels not movable with the support structures are provided, in the water filling of which dip strips are inserted, which are arranged on the adjacent support structures and are movable with them. Due to the relatively long furnace length and the resulting large length of the substructures for the longitudinal beams, the water channels in the known stoves are composed of individual longitudinal sections for structural reasons, which are provided on their abutting front ends with outwardly projecting flanges, which are arranged with sealing strips between them are bolted in order to achieve a firm and liquid-tight connection of the longitudinal shots placed next to each other.

Im Hinblick darauf, daß das im Ofen zu behandelnde Stückgut auf mindestens zwei Längsbalken je Balkengruppe zur Auflage gelangen muß und blechartiges Stückgut aus Unterstützungsgründen an seinem Rand nicht oder nur geringfügig über die das Gut tragenden Hubbalken seitlich hinausragen soll, ist ein möglichst geringer Mittenabstand zwischen den benachbarten Hubbalken der beiden Balkengruppen erwünscht. Bei den bisher bekannten Öfen war es jedoch aufgrund der konstruktiv bedingten Querschnittsmindestabmessungen der Wasserrinnen und Tauchleisten sowie der auf etwa gleicher Höhe befindlichen Tragkonstruktionen der Längsbalken nicht möglich, einen Mittenabstand von weniger als 400 mm zu realisieren, so daß bisher der Transport dünner Bleche wegen der dabei gegebenen Gefahr eines zu großen seitlichen Randüberstandes große Probleme verursacht.In view of the fact that the piece goods to be treated in the furnace must be supported on at least two longitudinal beams per bar group and that sheet-like piece goods should not or only slightly protrude laterally on its edge for reasons of support, the smallest possible center-to-center distance between the neighboring walking beams of the two groups of beams are desirable. In the previously known furnaces, however, it was not possible to achieve a center-to-center distance of less than 400 mm due to the design-related minimum cross-sectional dimensions of the water channels and dip strips and the supporting structures of the longitudinal beams, which were located at approximately the same height, so that previously thin sheets had to be transported because of this given the risk of excessive side overhang, causes great problems.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einem Ofen der eingangs genannten Gattung den Mittenabstand der Längsbalken zu reduzieren, ohne die Effektivität des gasdichten Abschlusses des Bodens zu gefährden. Dies wird erfindungsgemäß dadurch erreicht, daß bei diesem Ofen zwischen zwei benachbarten Tragkonstruktionen der Längsbalken ein sich ebenfalls über die gesamte Länge der Tragkonstruktionen erstreckender Schlauch vorgesehen ist, der sich an die senkrechte Seitenfläche mindestens einer der benachbarten Tragkonstruktionen dicht anschmiegt. Der Schlauch kann durch Füllung mit einem pneumatischen oder hydraulischen Druckmittel im Querschnitt aufweitbar und damit an die genannte Seitenfläche derart andrückbar sein, daß sich über die gesamte Ofenlänge hinweg am Ofenboden eine gute Abdichtung gegen in den Ofeninnenraum einströmende Luft ergibt.The invention is therefore based on the object to reduce the center distance of the longitudinal beams in a furnace of the type mentioned, without the effectiveness of endanger the gas-tight seal of the floor. This is achieved according to the invention in that, in this furnace, between two adjacent supporting structures of the longitudinal beams, a hose is also provided, which extends over the entire length of the supporting structures and which closely clings to the vertical side surface of at least one of the adjacent supporting structures. The tube can be expanded in cross-section by filling with a pneumatic or hydraulic pressure medium and can thus be pressed against the side surface in such a way that a good seal against air flowing into the interior of the furnace results over the entire length of the furnace.

Bei einer bevorzugten Ausführungsform der Erfindung ist der Schlauch an einer der beiden benachbarten Tragkonstruktionen gelagert, und zwar auf an dieser Tragkonstruktion angeordneten Konsolen, wobei er sich mit seiner einen Seite gegen die senkrechte Seitenfläche dieser Tragkonstruktion und mit seiner anderen Seite gegen die senkrechte Seitenfläche der benachbarten Tragkonstruktion andrückt. Es ist aber auch eine Ausführungsform denkbar, bei der die zwischen zwei Tragkonstruktionen befindlichen Schläuche nicht jeweils an einer dieser beiden Tragkonstruktionen gelagert sind, sondern individuell stationär zwischen den beiden Tragkonstruktionen angeordnet sind. Die beim Betrieb der Transportvorrichtung auftretende Relativbewegung zwischen Schlauch und sich bewegender senkrechter Seitenfläche, an die der Schlauch angedrückt wird, führt durch Reibung zum Auftreten einer Längszugspannung im Schlauch. Um diesen Nachteil zu reduzieren, kann es sich empfehlen, den Schlauch nicht unmittelbar an der senkrechten Seitenfläche der sich bewegenden Tragkonstruktion anliegen zu lassen, sondern über eine Gleitleiste, die an seiner dieser Seitenfläche zugewandten Seite angeordnet ist.In a preferred embodiment of the invention, the hose is mounted on one of the two adjacent support structures, namely on brackets arranged on this support structure, with one side against the vertical side surface of this support structure and the other side against the vertical side surface of the adjacent one Carrying structure presses. However, an embodiment is also conceivable in which the hoses located between two support structures are not each mounted on one of these two support structures, but are arranged individually and stationary between the two support structures. The relative movement between the hose and the moving vertical side surface against which the hose is pressed during operation of the transport device leads to the occurrence of a longitudinal tensile stress in the hose due to friction. In order to reduce this disadvantage, it may be advisable not to let the hose rest directly on the vertical side surface of the moving supporting structure, but rather via a slide bar which is arranged on its side facing this side surface.

Die Entstehung von Längszugspannungen im Schlauch wird bei einer besonders vorteilhaften Ausführungsform des erfindungsgemäßen Ofens dadurch völlig vermieden, daß an der der vertikalen Seitenfläche der benachbarten Tragkonstruktion zugewandten Seite des Schlauches eine sich über die gesamte Schlauchlänge erstreckende Schwinge sitzt, die unter- oder oberhalb des Schlauches um eine in Transportrichtung des Ofens gerichtete Achse schwenkbar ist und durch den Innendruck des Schlauches an die genannte Seitenfläche heranschwenkbar ist. Diese Schwinge kann unmittelbar oder über eine an ihr angeordnete Gleitleiste an der ihr gegenüberliegenden Tragkonstruktion durch den Schlauchinnendruck dichtend angedrückt werden.The occurrence of longitudinal tensile stresses in the hose is completely avoided in a particularly advantageous embodiment of the furnace according to the invention in that on the side of the hose facing the vertical side surface of the adjacent supporting structure there is a rocker arm which extends over the entire length of the hose and which is above or below the hose an axis directed in the transport direction of the furnace can be pivoted and can be pivoted towards the said side surface by the internal pressure of the hose. This rocker can be pressed directly or via a slide bar arranged on it on the opposite supporting structure by the inner tube pressure.

Um den Ofenboden nicht nur gasdicht, sondern darüber hinaus auch gut wärmeisolierend zu gestalten, ist bei den bekannten Öfen der eingangs genannten Gattung deren unterhalb der Längsbalken befindlicher wärmeisolierender Boden aus einer Anzahl von quer zur Transportrichtung des Ofens nebeneinander befindlichen Bodenteilen zusammengesetzt, von denen jedes Bodenteil unterhalb eines der Längsbalken angeordnet ist und von dessen Tragkonstruktion getragen wird. Bei den bekannten Öfen bestehen diese Bodenteile in der Regel aus Hartmaterial, beispielsweise Keramikmaterial, weshalb sie im Hinblick auf die während des Betriebs der Transportvorrichtung erfolgende ständige Relativbewegung zwischen zwei benachbarten Bodenteilen in einem geringen gegenseitigen Abstand angeordnet sein müssen. Dieser Abstand reduziert jedoch die Isolierwirkung des Bodens. Um diesen Nachteil auszuschalten sowie einen weiteren gasdichten Abschluß des Bodens gegenüber dem Ofeninnenraum zu gewährleisten, können erfindungsgemäß die Bodenteile jeweils von mehreren Lagen von wärmeisolierenden Fasermatten gebildet sein, die mit ihren Seitenrändern im wesentlichen aneinanderliegen.In order not only to make the furnace floor gas-tight, but also to provide good heat insulation, in the known furnaces of the type mentioned at the beginning, their heat-insulating floor, which is located below the longitudinal beams, is composed of a number of floor parts located next to one another transversely to the transport direction of the furnace, each of which floor part is arranged below one of the longitudinal beams and is supported by the supporting structure. In the known furnaces, these base parts generally consist of hard material, for example ceramic material, which is why they have to be arranged at a small mutual distance with respect to the constant relative movement between two adjacent base parts that takes place during operation of the transport device. However, this distance reduces the insulating effect of the floor. In order to eliminate this disadvantage and to ensure a further gas-tight closure of the floor in relation to the interior of the furnace, the floor parts can, according to the invention, be formed in each case by a plurality of layers of heat-insulating fiber mats which essentially lie against one another with their side edges.

Dieses Aneinanderliegen der Fasermatten zweier benachbarter Bodenteile kann zwar zu einem gewissen Abrieb an den aneinanderliegenden Mattenrändern führen. Die dabei entstehende Fuge zwischen benachbarten Bodenteilen wird aber auf ein Minimum beschränkt bleiben und ist in jedem Falle wesentlich kleiner als die Fuge, die bei aus Hartmaterial bestehenden Bodenteilen vorgesehen werden muß.This abutting of the fiber mats of two adjacent floor parts can lead to a certain amount of abrasion on the mating edges of the mats. The resulting joint between adjacent floor parts will be kept to a minimum and is in any case much smaller than the joint that must be provided for floor parts made of hard material.

Dieser erfindungsgemäße Vorteil wird auch dann erhalten, wenn aus Gründen einer besseren Abstützung oder Schonung der Fasermatten an deren einen Seitenrand eine senkrecht stehende Stützwand vorgesehen ist, die an der Tragkonstruktion für die Fasermatten dieses Bodenteils angeordnet ist.This advantage according to the invention is also obtained if, for reasons of better support or protection of the fiber mats, a vertical support wall is provided on one side edge thereof, which is arranged on the support structure for the fiber mats of this base part.

In der Zeichnung ist ein besonders vorteilhaftes Ausführungsbeispiel des erfindungsgemäßen Ofens dargestellt, das im folgenden näher beschrieben wird:

Fig. 1
zeigt einen Querschnitt durch den unteren Teil des Ofens in vereinfachter Darstellung,
Fig. 2
zeigt einen Ausschnitt des Querschnitts nach Fig. 1 in größerem Maßstab.
The drawing shows a particularly advantageous embodiment of the furnace according to the invention, which is described in more detail below:
Fig. 1
shows a cross section through the lower part of the furnace in a simplified representation,
Fig. 2
shows a section of the cross section of FIG. 1 on a larger scale.

Der in der Zeichnung dargestellte Gleichschrittofen hat zwei Gruppen von im Querschnitt des Ofens nebeneinanderliegenden Längsbalken 1, 2, wobei die Balken dieser beiden Gruppen abwechselnd im Abstand nebeneinander liegen. Diese Längsbalken 1, 2 sind jeweils über Stützen 4 von Tragkonstruktionen getragen, deren Hauptteil aus hohlkastenförmigen Tragbalken 6 besteht, die über Stützen 7 mit über einen Antriebsmechanismus in Ofenlängsrichtung hin- und her- sowie auf- und abbewegbaren Querbalken 8a und 8b verbunden sind.The step-by-step furnace shown in the drawing has two groups of longitudinal beams 1, 2 lying next to one another in the cross section of the furnace, the beams of these two groups being alternately spaced apart. These longitudinal beams 1, 2 are each supported on supports 4 of supporting structures, the main part of which consists of hollow-shaped supporting beams 6, which are connected via supports 7 to crossbars 8a and 8b which can be moved back and forth and up and down in the longitudinal direction of the furnace via a drive mechanism.

Unmittelbar auf den Tragbalken 6 sitzen mit diesen fest verbundene und mitbewegbare Bodenteile 3, die gemeinsam den Herdboden des Ofens bilden. Diese Bodenteile 3 bestehen jeweils aus einer Anzahl von übereinandergelegten Fasermatten, die sich auf einem halbschalenförmigen Stützteil 5 abstützen. Dieses Stützteil 5 besteht aus einer an der Oberseite des Tragbalkens befestigten Bodenplatte, auf welcher die Fasermatten gelagert sind, und einer an einem Seitenrand dieser Bodenplatte nicht bis zur obersten Fasermatte hochstehenden Seitenwand. Die benachbarten Bodenteile liegen mit ihren Fasermatten und der hochstehenden Seitenwand unmittelbar aneinander an, wodurch eine gute Isolierwirkung und ein zusätzlicher weitgehend gasdichter Abschluß des Herdbodens des Ofens gewährleistet wird.Immediately on the support beam 6 sit firmly connected and movable floor parts 3, which together form the hearth of the furnace. These bottom parts 3 each consist of a number of superimposed fiber mats, which are supported on a half-shell-shaped support part 5. This support part 5 consists of a base plate fastened to the upper side of the supporting beam, on which the fiber mats are mounted, and a side wall which does not protrude up to the uppermost fiber mat on a side edge of this base plate. The adjacent floor parts are in direct contact with one another with their fiber mats and the upstanding side wall, as a result of which a good insulation effect and an additional largely gas-tight closure of the stove top of the oven is ensured.

Jeder zweite Längsbalken 2 hat an seiner Tragkonstruktion Konsolen 9, die beidseitig vom Tragbalken 6 vorstehen und an beiden Seiten dieses Balkens liegende Schläuche 11 tragen, die sich über die gesamte Balkenlänge erstrecken. Mit ihrer dem Tragbalken 6 zugewandten Seite liegen diese Schläuche an den senkrechten Seitenflächen dieser Tragbalken an, während an ihrer anderen Seitenfläche jeweils eine Schwinge 12 anliegt, die sich ebenfalls über die gesamte Balkenlänge erstreckt und um sich in Schlauchlängsrichtung erstreckende Achsen 13 schwenkbar ist. An der dem Schlauch abgewandten Seite tragen diese Schwingen Gleitleisten 14, die in Halterungen 15 gelagert sind und mit ihrer glatten Seitenfläche an den vertikalen Seiten der benachbarten Tragbalken 6 angedrückt werden können. Dieses Andrücken der Gleitleisten 14 erfolgt durch Aufweitung der Schläuche 11 mit Hilfe eines in die Schläuche eingefüllten pneumatischen oder hydraulischen Druckmittels. Die Gleitleisten bestehen zweckmäßig aus einem abriebfesten Material mit glatter Oberfläche, beispielsweise Hartkunststoff.Every second longitudinal beam 2 has brackets 9 on its supporting structure, which protrude on both sides from the supporting beam 6 and carry hoses 11 lying on both sides of this beam, which extend over the entire length of the beam. With their side facing the support beam 6, these hoses lie against the vertical side surfaces of these support beams, while on their other side surface there is a rocker 12, which also extends over the entire length of the beam and can be pivoted about axes 13 extending in the longitudinal direction of the hose. On the side facing away from the hose, these rockers carry slide bars 14, which are mounted in holders 15 and can be pressed with their smooth side surface onto the vertical sides of the adjacent supporting beams 6. This pressing of the slide strips 14 takes place by widening the hoses 11 with the aid of a pneumatic or hydraulic pressure medium filled into the hoses. The slide strips suitably consist of an abrasion-resistant material with a smooth surface, for example hard plastic.

Die Schwingen greifen mit ihrer der Schwenkachse 13 abgewandten oberen Seite teilweise über die Schläuche 11 hinweg, um diese nach oben hin gegenüber der Hitze und eventuell herabfallenden heißen Spänen od.dgl. abzuschirmen. Zum gleichen Zweck sind an den Seitenflächen der Tragbalken 6 Winkelprofile 16 angeordnet.With their upper side facing away from the pivot axis 13, the rockers partially reach over the hoses 11, in order to raise them towards the heat and possibly falling hot chips or the like. shield. For the same purpose 6 angle profiles 16 are arranged on the side surfaces of the supporting beams.

Es ist auch möglich, daß jeder Längsbalken einseitig vorstehende Konsolen mit Schläuchen usw. hat.It is also possible for each longitudinal beam to have brackets with hoses etc. protruding on one side.

Claims (11)

  1. Oven for the heat treatment of piece goods, eg metal plates and sheets, with a transport device for the conveyance of the goods to be heated through the oven, comprising two groups of longitudinal beams carrying the goods, which are located, alternating at a distance, one beside the other and of which at least one group of beams can be moved forwards, a partial stage of the transport route, through the oven in a higher position than the other group of beams and subsequently can be moved back into its starting position in a lower position than this other group of beams, a supporting construction being provided under each longitudinal beam supporting the latter and movable with it, which has at least one vertical side surface extending continuously over the entire length of the lower construction which faces the supporting construction of the neighbouring longitudinal beam, characterised in that between the two neighbouring supporting constructions (6), likewise extending over the entire length of the supporting construction, a tube (11) is provided which nestles closely against the aforementioned side surface.
  2. Oven according to claim 1, characterised in that the tube (11) can be expanded in cross section by filling with a pneumatic or hydraulic pressure medium and thus can be pressed against the aforementioned side surface.
  3. Oven according to claim 1, characterised in that the tube (11) is mounted on one of the two neighbouring supporting constructions (6).
  4. Oven according to claim 3, characterised in that the tube (11) is mounted on one or several brackets (9) which are provided on the supporting construction (6).
  5. Oven according to claim 4, characterised in that the supporting construction (6) of each second longitudinal beam (2) carries two sealing tubes (11) which nestle against the vertical side surfaces facing them of the two neighbouring supporting constructions (6).
  6. Oven according to claim 1, characterised in that the tube (11) on its side facing the aforementioned vertical side surface carries a slide bar extending over its whole length which can be pressed against the aforementioned side surface by means of the tube.
  7. Oven according to claim 6, characterised in that on the side of the tube (11) facing the aforementioned vertical side surface a rocker arm (12) is arranged extending over the entire length of the tube which is pivotable beneath or above the tube (11) about an axis (13) extending in the transport direction of the oven and is pivotable by means of the internal pressure of the tube on to the aforementioned side surface.
  8. Oven according to claim 7, characterised in that on the side of the rocker arm (12) facing the aforementioned vertical side surface sits a slide bar (14) extending over the entire length of the rocker arm.
  9. Oven according to claim 6 or 8, characterised in that the slide bar (14) has a smooth surface capable of sliding.
  10. Oven, in particular according to claim 1, whose heat insulating base located beneath the longitudinal beams consists of a number of base parts located one beside the other transversely to the transport direction of the oven, of which each base part is arranged beneath one of the longitudinal beams and is supported by its supporting construction, characterised in that the base parts (3) are formed in each case of several layers of heat insulating fibrous mats which lie with their lateral edges essentially against one another.
  11. Oven according to claim 10, characterised in that the fibrous mats lie on a supporting surface (5) which is fastened to the supporting construction (6) in its upper region and which has a side wall extending upwards at least over a part of the total height of the mat layers against which the fibrous mats of the neighbouring base part (3) essentially lie.
EP92109728A 1991-06-14 1992-06-10 Heat treatment furnace for bulk materials Expired - Lifetime EP0518279B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4119709 1991-06-14
DE4119709A DE4119709A1 (en) 1991-06-14 1991-06-14 OVEN FOR HEAT TREATMENT OF PIECE OF GOODS

Publications (2)

Publication Number Publication Date
EP0518279A1 EP0518279A1 (en) 1992-12-16
EP0518279B1 true EP0518279B1 (en) 1995-08-30

Family

ID=6433984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109728A Expired - Lifetime EP0518279B1 (en) 1991-06-14 1992-06-10 Heat treatment furnace for bulk materials

Country Status (6)

Country Link
US (1) US5248254A (en)
EP (1) EP0518279B1 (en)
AT (1) ATE127211T1 (en)
DE (2) DE4119709A1 (en)
DK (1) DK0518279T3 (en)
ES (1) ES2080377T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2480695C2 (en) * 2008-02-13 2013-04-27 Солиос Карбон Gate with inflatable peripheral seal, and locking system of window of multichamber furnace, which contains such gate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6004130A (en) * 1997-08-06 1999-12-21 Kaiser Aluminum & Chemical Corporation Flue seal for a carbon anode baking furnace
US20140186484A1 (en) * 2012-12-27 2014-07-03 Berndorf Band Gmbh Sealing system for a moved metal strip as well as a strip casting installation with such a sealing system
EP3935334B1 (en) * 2019-03-05 2024-03-20 SMS group S.p.A. Furnace with movable beam load handling system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE683012C (en) * 1934-09-30 1939-10-27 Benno Schilde Maschb Akt Ges Storage of the fixed hearth back for continuous ovens with vibrating beam conveyor
FR1344841A (en) * 1963-01-23 1963-11-29 Demag Ag Sealing device for the head cap of metallurgical or similar furnaces
US3948494A (en) * 1974-10-21 1976-04-06 Sola Basic Industries, Inc. Walking beam furnace
DE2926661A1 (en) * 1979-07-02 1981-01-15 Italimpianti Deutschland Indus RIFLE BAR OVEN
FR2485711A1 (en) * 1980-06-24 1981-12-31 Hartmann Pere & Fils SEALED CLOSURE DEVICE FOR HYDRAULIC CIRCUIT FURNACE TUNNEL AND COUPLING FOR HYDRAULIC CIRCUIT
FR2542433B1 (en) * 1983-03-11 1988-01-29 Stein Heurtey REFRACTORY BEAM OVENS
JPS6237313A (en) * 1985-08-09 1987-02-18 Chugai Ro Kogyo Kaisha Ltd Walking beam type heating furnace for billet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2480695C2 (en) * 2008-02-13 2013-04-27 Солиос Карбон Gate with inflatable peripheral seal, and locking system of window of multichamber furnace, which contains such gate

Also Published As

Publication number Publication date
DE59203434D1 (en) 1995-10-05
EP0518279A1 (en) 1992-12-16
US5248254A (en) 1993-09-28
DK0518279T3 (en) 1995-11-06
ATE127211T1 (en) 1995-09-15
ES2080377T3 (en) 1996-02-01
DE4119709A1 (en) 1992-12-17

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