EP0711970A1 - Shield used on the beam conveyor of a walking beam furnace - Google Patents

Shield used on the beam conveyor of a walking beam furnace Download PDF

Info

Publication number
EP0711970A1
EP0711970A1 EP95116317A EP95116317A EP0711970A1 EP 0711970 A1 EP0711970 A1 EP 0711970A1 EP 95116317 A EP95116317 A EP 95116317A EP 95116317 A EP95116317 A EP 95116317A EP 0711970 A1 EP0711970 A1 EP 0711970A1
Authority
EP
European Patent Office
Prior art keywords
shoe according
segments
covering
cover
segment
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.)
Withdrawn
Application number
EP95116317A
Other languages
German (de)
French (fr)
Inventor
Siegfried Zündorff
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.)
Dw Schulte & Co KG GmbH
Original Assignee
Dw Schulte & Co KG 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 Dw Schulte & Co KG GmbH filed Critical Dw Schulte & Co KG GmbH
Publication of EP0711970A1 publication Critical patent/EP0711970A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14Furnaces 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
    • F27B9/20Furnaces 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
    • F27B9/201Furnaces 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30Details, accessories, or equipment peculiar to furnaces of these types

Definitions

  • the invention relates to a cover shoe which is arranged on the standing tube of the walking beam conveyor of a walking beam furnace and covers an opening of the furnace floor which is penetrated by the standing tube.
  • Walking beam furnaces also known in practice as beam hearth furnaces, are known to be used in the steel industry for heating slabs, blocks, billets and the like. used on the rolling temperature. They have a beam hearth in the form of a walking beam conveyor, with which the slabs to be heated or the like. are gradually conveyed through the furnace chamber until they finally leave the furnace when heated to the required temperature.
  • the walking beam conveyors consist of walking beams which are supported by vertical supports, the so-called stand pipes, and which are given the working movement in the form of a rectangular orbit over the stand pipes.
  • the latter consist of high-strength steel pipes with a ceramic jacket and associated pipe cooling.
  • the standpipes pass through approximately slot-shaped openings on the furnace sole, and the drive of the walking beam conveyor and additional units can be arranged below the furnace sole or the furnace floor.
  • the object of the invention is above all to create the aforementioned problems and the disadvantages previously accepted by an improved covering shoe, which is characterized above all by a considerably increased service life and, if possible, also improved covering or protective effect.
  • the cover shoe consists of a highly heat-resistant ceramic material and is composed of several segments.
  • a refractory ceramic material with high thermal shock resistance is preferably used for the cover shoe.
  • the cover shoe according to the invention which is made of the highly heat-resistant ceramic material, is distinguished at the high furnace temperatures by a considerably longer service life than the covers used previously. It can also be made so large in its dimensions that a significantly improved covering and protective effect is achieved, so that the heat losses through heat radiation through the bottom openings of the walking beam furnace considerably reduced and the thermal stresses of the operating facilities located below the furnace floor are considerably reduced.
  • the cover shoe according to the invention is made in several parts; it consists of segments which can be joined together on the standpipe to form the cover shoe and which enclose the standpipe, that is to say together form a standpipe bushing on the cover shoe.
  • this is expediently provided with a support for the cover shoe.
  • This support can be made relatively narrow, so that it lies essentially completely in the cooling zone of the standpipe and is consequently removed from the furnace temperature leading to its scaling when it is made of high-strength steel or cast steel.
  • a simple support ring is appropriately provided on the standpipe.
  • the cover shoe consists of two segments, preferably in such a design that each of these two segments has an approximately semi-cylindrical shape, these two shapes jointly forming the standpipe bushing.
  • the segments are expediently designed so that they can be releasably connected to form the cover shoe, preferably with the aid of a simple plug connection or the like.
  • a cover ring to the standpipe at a distance above the aforementioned support or the support ring forming it, which, like the support ring, can be dimensioned so narrow in its radial dimension that it is also located in the cooling area of the standpipe cooling.
  • the cover ring can also consist of a steel or cast steel ring. The arrangement can be advantageously made so that the support ring and the cover ring together form a receiving pocket into which the segments of the cover shoe radially from the outside can be inserted so that they closely surround the standpipe.
  • the cover shoe according to the invention can be easily and quickly attached to the standpipe.
  • the segments of the cover shoe can be plugged together by means of a simple plug-in connection and if the cover shoe is formed from two segments that can be attached and joined to the standpipe from the opposite sides.
  • the one segment of the cover shoe has an insert pocket or the like which is open at the edge. in which the other segment can be inserted from the outside in the manner of a bolt.
  • Elements are expediently formed on the segments by a tongue and groove connection, so that they can be joined together while being aligned.
  • connection of the segments to one another is expediently carried out by means of connecting elements which likewise consist of a highly heat-resistant ceramic material which can correspond to that of the covering shoe.
  • These connecting elements advantageously consist of simple plug pins.
  • the segments of the cover shoe have pocket shapes which together form a, preferably cylindrical, bolt pocket for the plug pin.
  • a particularly advantageous design of the cover shoe according to the invention is obtained if one segment of the cover shoe is shaped as an insertion fork that is open to its rear, on the bottom of which the aforementioned semi-cylindrical shape is molded, which with the semi-cylindrical shape of the other segment that can be inserted into the insertion fork as a locking bolt the standpipe bushing forms.
  • one segment has considerably larger dimensions than the other segment, which essentially has the function of a closure piece.
  • the cover shoe is advantageously held on the standpipe by means of a support ring attached to it, suitably in connection with a cover ring. It is advisable to arrange holding means on the support ring and / or cover ring which serve for the rotationally fixed connection of the segments with the support or cover ring and therefore with the standpipe.
  • These holding means can consist of holding cams arranged on the support ring and / or on the cover ring and recesses arranged on the segments for the engagement of the holding cams.
  • the cover shoe made of refractory ceramic material according to the invention can have relatively large dimensions, so that it completely or at least largely covers the associated bottom opening on the furnace bottom.
  • the cover shoe can advantageously be designed so that one segment, seen radially to the standpipe, has a greater length than its other segment.
  • the segment which is longer in the radial direction is expediently designed in such a way that it tapers in width toward its free, rounded end.
  • the thickness of the covering shoe according to the invention is advantageously approximately 60 to 130 mm, preferably 90 to 110 mm.
  • the standpipes 1 show the arrangement of the covering shoes on the vertical individual supports of the walking beam conveyor formed by standpipes 1 in a greatly schematic simplification and in a partial section of a walking beam furnace.
  • the standpipes 1 have a casing 3 made of refractory ceramic material in the furnace space above the furnace base 2 and are, as usual, provided with tube cooling.
  • the stand pipes 1 are part of the beam hearth, which is designed as a walking beam conveyor.
  • the standpipes, of which only two are shown in FIG. 1, carry lifting beams, not shown, which extend in the direction of passage F and are optionally connected by crossbars or, as shown in simplified form in FIG.
  • crossbars 4 as supports for those in the walking beam furnace to be heated slabs 5 or other parts which are heated to the rolling temperature in the direction of arrow F as they pass through the walking beam furnace.
  • the walking beam conveyor with the stand pipes 1 and the ones carried by them, the support for the slabs 5 or the like.
  • the forming bar executes the working movement indicated in the diagram according to FIG. 1 in the form of a rectangular orbit, the feed path in the direction of passage F is indicated by arrow S and the return stroke is indicated by arrow R.
  • the operation of the walking beam furnace or the walking beam conveyor is known, so that no further explanation is required.
  • the upright tubes 1 with their lower end regions pass through openings 6 on the furnace floor 2, these openings being approximately slit-like in such a way that the working movements of the walking beam conveyor and its upright tubes 1 are possible in accordance with the diagram shown.
  • the openings 6 thus have a length in the direction of passage F which is the same or slightly larger than the feed path S.
  • the drive of the walking beam conveyor together with further operating devices can be located below the furnace floor.
  • cover shoes 7 are arranged on the stand pipes 1, which cover the floor openings 6 and which, according to the invention, consist of a highly heat-resistant ceramic material, preferably one with high thermal shock resistance.
  • each cover shoe 7 is made in two parts. It is composed of two segments 8 and 9, each of which is made of the highly heat-resistant ceramic material and which are attached to the standpipe 1 and joined together to form the cover shoe.
  • the ceramic sheathing of the standpipe 1, which comes close to the cover shoe 7, is not shown.
  • a support ring 10 and a cover ring 11 at a distance above it, for example by welding, are fastened to the standing tube 1 as a support for the cover shoe 7.
  • the support ring 10 and the cover ring 11 each have only a relatively small radial width. They are therefore still in the cooling area of the standpipe cooling.
  • the vertical distance between the support ring 10 and the cover ring 11 corresponds essentially to the thickness of the cover shoe 7 or its segments 8 and 9.
  • the support ring 10 and the cover ring 11 form a receiving pocket for the segments 8 and 9 of the cover shoe 7 which surrounds the standing tube 1 in a ring.
  • the segments 8 and 9 protrude beyond the circumference of the support ring 10 and the cover ring 11.
  • the segment 8 tapers in the direction of passage F (FIG. 1) towards its free, rounded end 8 ′ the width.
  • the thickness of the two segments 8 and 9 is expediently approximately 90 to 110 mm, but can also deviate up or down from this thickness dimension.
  • Each of the two segments 8 and 9 has an approximately semi-cylindrical shape 12 or 13 which is adapted to the diameter of the standing tube 1 and which together form the standing tube bushing.
  • the segment 8 has on its rear side opposite the free end 8 'an integrally formed insertion fork 14 with the two parallel fork cheeks 15, with the bottom of the insertion fork 14 having the semi-cylindrical shape 12 formed on it with the semi-cylindrical shape 13 of the other segment 9 the standpipe bushing forms.
  • the insertion fork 15 thus forms an insertion pocket which is open on the edge and into which the other segment 9 can be inserted in the manner of a locking bolt or locking piece with positive locking, as is shown above all in FIGS. 2 to 4.
  • approximately semicircular grooves 16 are formed on the inside of the fork legs 15 of the segment 8 and on their opening area, and correspondingly shaped spring elements 17 are formed on the outside on the two parallel side edges of the other segment 9.
  • Form spring connections When the segment 9 is inserted into the insertion fork 14 of the other segment 8, the spring elements 17 slide into the grooves 16, whereby a positive sliding connection between the segments is effected.
  • 2 and 3 in particular show that retaining cams 18 which project upwards on diametrically opposite sides are fastened to the support ring 10 and, when the cover shoe 7 is mounted on the standpipe 1, engage in recesses 19 from below which, like FIG.
  • connecting elements which are also made of a highly heat-resistant ceramic material.
  • these connecting elements consist of cylindrical socket pins 20 which are inserted from above into approximately semi-cylindrical pocket shapes 21, 22 of the segments 8 and 9, as a result of which they are detachably connected to one another in their mounting position on the standing tube 1.
  • the pocket formations 21 are located on the fork legs 15 of the segment 8 above the molded grooves 16 (FIG. 4), while the corresponding semi-cylindrical pocket formations 22 are arranged on the two opposite sides of the segment 9, above the spring elements 17.
  • the larger segment 8 When the cover shoe 7 is installed, the larger segment 8 can first be inserted from one side into the receiving pocket formed by the support ring 10 and the cover ring 11, with its centering recess 19 being pushed into the holding cams 18.
  • the smaller segment 9 can then be inserted into the receiving pocket from the opposite side and the insertion fork 14 are inserted, the tongue and groove connections 16, 17 effecting a positive connection and guidance.
  • the segment 9 In the inserted state, the segment 9 is locked against rotation by the engagement of the holding cam 18 in its recess 19 with respect to the standpipe 1.
  • the ceramic plug pins 20 can then be inserted from above into the insertion pockets formed by the corresponding pocket recesses 21, 22, as a result of which the two segments 8 and 9 are connected to one another and fixed on the standpipe 1.
  • the invention is not limited to the preferred exemplary embodiment of the covering shoe 7 described above.
  • the cover shoe 7 could also consist of more than two segments, e.g. three segments, or be formed in a two-part design from two half-parts, for example in such a way that it is divided along its longitudinal central axis, the two half-parts also expediently or similarly by plug connections. get connected.

Landscapes

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

Abstract

The cover shoe (7) which is mounted on the standing pipe of the conveyor is made from a highly heat resistant ceramic material and is made up of several segments (8,9). The standing pipe is provided with a support bearing for the shoe. The segments fit detachably together by push-in connection. Two segments can be provided each having a semicylindrical shape which together form the guide for passing the standing pipe through. The bearing of the pipe is formed by a steel support ring (10). A steel cover (11) is mounted on the pipe to engage over the shoe.

Description

Die Erfindung betrifft einen Abdeckschuh, der am Stehrohr des Hubbalkenförderers eines Hubbalkenofens angeordnet und eine vom Stehrohr durchgriffene Öffnung des Ofenbodens überdeckt.The invention relates to a cover shoe which is arranged on the standing tube of the walking beam conveyor of a walking beam furnace and covers an opening of the furnace floor which is penetrated by the standing tube.

Hubbalkenöfen, in der Praxis auch als Balkenherdofen bezeichnet, werden bekanntlich in der Stahlindustrie zur Erwärmung von Brammen, Blöcken, Knüppel u.dgl. auf die Walztemperatur verwendet. Sie weisen einen Balkenherd in Gestalt eines Hubbalkenförderers auf, mit dem die zu erwärmenden Brammen o.dgl. schrittweise durch den Ofenraum hindurchgefördert werden, bis sie schließlich auf die geforderte Temperatur erwärmt den Ofen verlassen. Die Hubbalkenförderer bestehen aus Hubbalken, die von vertikalen Stützen, den so genannten Stehrohren, getragen werden und denen die Arbeitsbewegung in Form einer rechteckigen Umlaufbahn über die Stehrohre erteilt wird. Letztere bestehen aus hochfesten Stahlrohren mit Keramikmantel und zugeordneter Rohrkühlung. Die Stehrohre durchgreifen etwa schlitzförmige Öffnungen an der Ofensohle, wobei unterhalb der Ofensohle bzw. des Ofenbodens der Antrieb des Hubbalkenförderers nebst Zusatzaggregaten angeordnet sein kann.Walking beam furnaces, also known in practice as beam hearth furnaces, are known to be used in the steel industry for heating slabs, blocks, billets and the like. used on the rolling temperature. They have a beam hearth in the form of a walking beam conveyor, with which the slabs to be heated or the like. are gradually conveyed through the furnace chamber until they finally leave the furnace when heated to the required temperature. The walking beam conveyors consist of walking beams which are supported by vertical supports, the so-called stand pipes, and which are given the working movement in the form of a rectangular orbit over the stand pipes. The latter consist of high-strength steel pipes with a ceramic jacket and associated pipe cooling. The standpipes pass through approximately slot-shaped openings on the furnace sole, and the drive of the walking beam conveyor and additional units can be arranged below the furnace sole or the furnace floor.

Bei den hohen Betriebstemperaturen der Hubbalkenöfen, die im allgemeinen bei 1350°C liegen, kommt es an den der Stehrohrdurchführung dienenden Bodenöffnungen des Ofenbodens zu nicht unerheblichen Wärmeabstrahlungen, was zu Wärmeverlusten und auch zu erheblichen Wärmebeanspruchungen der unterhalb der Ofensohle installierten Betriebseinrichtungen führt. Um hier Abhilfe zu schaffen, ist es üblich, an der Stehrohren Abdeckungen anzuordnen, die die genannten Bodenöffnungen überdecken. Die gebräuchlichen Abdeckungen, in der Praxis auch als Hubherd-Steherkonsolen bezeichnet, werden aus hochwertigem Stahlguß gefertigt. Dennoch unterliegen diese Abdeckungen bei den hohen Ofentemperaturen einer starken Verzunderung, so daß ihre Standzeiten begrenzt sind. Außerdem müssen die Abdeckungen verhältnismäßig kleinflächig bemessen werden, so daß sie überwiegend im Kühlbereich der Stehrohre liegen. Daraus resultiert eine ungenügende Abdeckfunktion im Bezug auf die schlitzartigen Bodenöffnungen des Ofens, so daß verhältnismäßig große Wärmeverluste über die Bodenöffnungen und entsprechend hohe Wärmebeanspruchungen der unterhalb des Ofenbodens befindlichen Betriebseinrichtungen gegeben sind.At the high operating temperatures of the walking beam furnaces, which are generally at 1350 ° C., there are no openings in the bottom of the furnace bottom which serve to pass through the standing tube insignificant heat radiation, which leads to heat loss and also to considerable heat stresses of the operating equipment installed below the furnace sole. To remedy this, it is customary to arrange covers on the standpipes which cover the floor openings mentioned. The customary covers, also known in practice as standing hearth brackets, are made of high-quality cast steel. Nevertheless, these covers are subject to severe scaling at the high furnace temperatures, so that their service lives are limited. In addition, the covers must be dimensioned relatively small, so that they are mainly in the cooling area of the standpipes. This results in an insufficient covering function in relation to the slot-like bottom openings of the furnace, so that there are relatively large heat losses through the bottom openings and correspondingly high thermal stresses on the operating devices located below the bottom of the furnace.

Aufgabe der Erfindung ist es vor allem, die vorgenannten Probleme und die bisher in Kauf genommenen Nachteile durch einen verbesserten Abdeckschuh zu schaffen, der sich vor allem durch erheblich erhöhte Standzeit und möglichst auch verbesserte Abdeck- bzw. Schutzwirkung auszeichnet.The object of the invention is above all to create the aforementioned problems and the disadvantages previously accepted by an improved covering shoe, which is characterized above all by a considerably increased service life and, if possible, also improved covering or protective effect.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Abdeckschuh aus einem hochhitzebeständigen Keramikmaterial besteht und aus mehreren Segmenten zusammengesetzt ist. Vorzugsweise wird für den Abdeckschuh ein feuerfestes keramisches Material von hoher Temperaturwechselbeständigkeit verwendet.This object is achieved in that the cover shoe consists of a highly heat-resistant ceramic material and is composed of several segments. A refractory ceramic material with high thermal shock resistance is preferably used for the cover shoe.

Der erfindungsgemäß aus dem hochhitzebeständigen Keramikmaterial bestehende Abdeckschuh zeichnet sich bei den hohen Ofentemperaturen durch gegenüber den bisher verwendeten Abdeckungen erheblich verlängerte Standzeit aus. Er kann außerdem in seinen Abmessungen so groß ausgeführt werden, daß eine deutlich verbesserte Abdeck- und Schutzwirkung erreicht wird, so daß die Wärmeverluste durch Wärmestrahlung über die Bodenöffnungen des Hubbalkenofens erheblich vermindert und die Wärmebeanspruchungen der unterhalb des Ofenbodens befindlichen Betriebseinrichtungen beträchtlich reduziert werden. Der erfindungsgemäße Abdeckschuh ist mehrteilig ausgeführt; er besteht aus an dem Stehrohr zu dem Abdeckschuh zusammenfügbaren Segmenten, die das Stehrohr umschließen, also gemeinsam eine Stehrohrdurchführung am Abdeckschuh bilden.The cover shoe according to the invention, which is made of the highly heat-resistant ceramic material, is distinguished at the high furnace temperatures by a considerably longer service life than the covers used previously. It can also be made so large in its dimensions that a significantly improved covering and protective effect is achieved, so that the heat losses through heat radiation through the bottom openings of the walking beam furnace considerably reduced and the thermal stresses of the operating facilities located below the furnace floor are considerably reduced. The cover shoe according to the invention is made in several parts; it consists of segments which can be joined together on the standpipe to form the cover shoe and which enclose the standpipe, that is to say together form a standpipe bushing on the cover shoe.

Zur Halterung des erfindungsgemäßen Abdeckschuhs am Stehrohr wird dieses zweckmäßig mit einem Auflager für den Abdeckschuh versehen. Dieses Auflager kann verhältnismäßig schmal ausgeführt werden, so daß es im wesentlichen vollständig im Bereich der Kühlzone des Stehrohrs liegt und folglich bei seiner Ausführung aus einem hochfesten Stahl oder Stahlguß der zu seiner Verzunderung führenden Ofentemperatur entzogen ist. Für das Auflager wird zweckmäßig am Stehrohr ein einfacher Stützring vorgesehen.To hold the cover shoe according to the invention on the standpipe, this is expediently provided with a support for the cover shoe. This support can be made relatively narrow, so that it lies essentially completely in the cooling zone of the standpipe and is consequently removed from the furnace temperature leading to its scaling when it is made of high-strength steel or cast steel. For the support, a simple support ring is appropriately provided on the standpipe.

Bei einer bevorzugten Ausführungsform der Erfindung besteht der Abdeckschuh aus zwei Segmenten, vorzugsweise in einer solchen Gestaltung, daß jedes dieser beiden Segmente eine etwa halbzylindrische Ausformung aufweist, wobei diese beiden Ausformungen gemeinsam die Stehrohrdurchführung bilden. Die Segmente werden zweckmäßig so ausgeführt, daß sie sich lösbar zu dem Abdeckschuh zusammenschließen lassen, vorzugsweise mit Hilfe einer einfachen Steckverbindung o.dgl..In a preferred embodiment of the invention, the cover shoe consists of two segments, preferably in such a design that each of these two segments has an approximately semi-cylindrical shape, these two shapes jointly forming the standpipe bushing. The segments are expediently designed so that they can be releasably connected to form the cover shoe, preferably with the aid of a simple plug connection or the like.

Es empfiehlt sich weiterhin, am Stehrohr im Abstand über dem vorgenannten Auflager bzw. dem es bildenden Stützring einen Abdeckring zu befestigen, der, wie der Stützring, in seiner radialen Abmessung so schmal bemessen werden kann, das er sich ebenfalls im Kühlbereich der Stehrohrkühlung befindet. Der Abdeckring kann hierbei ebenfalls aus einem Stahl- oder Stahlgußring bestehen. Die Anordnung läßt sich mit Vorteil so treffen, daß der Stützring und der Abdeckring gemeinsam eine Aufnahmetasche bilden, in die die Segmente des Abdeckschuhs radial von außen eingesteckt werden können, so daß sie das Stehrohr eng umschließen.It is also advisable to attach a cover ring to the standpipe at a distance above the aforementioned support or the support ring forming it, which, like the support ring, can be dimensioned so narrow in its radial dimension that it is also located in the cooling area of the standpipe cooling. The cover ring can also consist of a steel or cast steel ring. The arrangement can be advantageously made so that the support ring and the cover ring together form a receiving pocket into which the segments of the cover shoe radially from the outside can be inserted so that they closely surround the standpipe.

Der erfindungsgemäße Abdeckschuh läßt sich leicht und rasch am Stehrohr anbauen. In dieser Hinsicht vorteilhaft ist es, wenn die Segmente des Abdeckschuhs mittels einer einfachen Steckverbindung zusammensteckbar sind und wenn der Abdeckschuh aus zwei, von den entgegengesetzten Seiten an das Stehrohr ansetzbaren und zusammenfügbaren Segmenten gebildet wird. Bei einer vorteilhaften Ausführungsform der Erfindung weist das eine Segment des Abdeckschuhs eine randseitig offene Einstecktasche o.dgl. auf, in die das andere Segment nach Art eines Steckriegels von außen einsteckbar ist. An den Segmenten werden zweckmäßig Elemente eine Nut-Federverbindung angeformt, so daß sie sich unter Ausrichtung zueinander zusammenfügen lassen. Im übrigen erfolgt diese Verbindung der Segmente untereinander zweckmäßig mittels Verbindungselemente, die ebenfalls aus einem hochhitzebeständigen keramischen Material bestehen, das demjenigen des Abdeckschuhs entsprechenden kann. Diese Verbindungselemente bestehen vorteilhafterweise aus einfachen Steckbolzen. Die Segmente des Abdeckschuhs weisen hierbei Taschenausformungen auf, die gemeinsam eine, vorzugsweise zylindrische, Bolzentasche für den Steckbolzen bilden.The cover shoe according to the invention can be easily and quickly attached to the standpipe. In this regard, it is advantageous if the segments of the cover shoe can be plugged together by means of a simple plug-in connection and if the cover shoe is formed from two segments that can be attached and joined to the standpipe from the opposite sides. In an advantageous embodiment of the invention, the one segment of the cover shoe has an insert pocket or the like which is open at the edge. in which the other segment can be inserted from the outside in the manner of a bolt. Elements are expediently formed on the segments by a tongue and groove connection, so that they can be joined together while being aligned. Moreover, this connection of the segments to one another is expediently carried out by means of connecting elements which likewise consist of a highly heat-resistant ceramic material which can correspond to that of the covering shoe. These connecting elements advantageously consist of simple plug pins. The segments of the cover shoe have pocket shapes which together form a, preferably cylindrical, bolt pocket for the plug pin.

Eine besonders vorteilhafte Gestaltungsform des erfindungsgemäßen Abdeckschuhs ergibt sich, wenn das eine Segment desselben als eine zu seiner Rückseite offene Einsteckgabel geformt ist, an deren Grund die vorgenannte halbzylindrische Ausformung angeformt ist, die mit der halbzylindrischen Ausformung des anderen, als Steckriegel in die Einsteckgabel einführbaren Segments die Stehrohrdurchführung bildet. Bei dieser Ausführung des Abdeckschuhs weist das eine Segment erhebliche größere Abmessungen auf als das andere Segment, das im wesentlichen die Funktion eines Verschlußstücks hat.A particularly advantageous design of the cover shoe according to the invention is obtained if one segment of the cover shoe is shaped as an insertion fork that is open to its rear, on the bottom of which the aforementioned semi-cylindrical shape is molded, which with the semi-cylindrical shape of the other segment that can be inserted into the insertion fork as a locking bolt the standpipe bushing forms. In this embodiment of the cover shoe, one segment has considerably larger dimensions than the other segment, which essentially has the function of a closure piece.

Wie oben erwähnt, erfolgt die Halterung des Abdeckschuhs am Stehrohr zweckmäßig mittels eines an diesem befestigten Stützrings, zweckmäßig in Verbindung mit einem Abdeckring. Dabei empfiehlt es sich, am Stützring und/oder Abdeckring Haltemittel anzuordnen, die der drehfesten Verbindung der Segmente mit dem Stütz- bzw. Abdeckring und daher mit dem Stehrohr dienen. Diese Haltemittel können aus am Stützring und/oder am Abdeckring angeordneten Haltenocken und an den Segmenten angeordneten Ausnehmungen für den Eingriff der Haltenocken bestehen.As mentioned above, the cover shoe is advantageously held on the standpipe by means of a support ring attached to it, suitably in connection with a cover ring. It is advisable to arrange holding means on the support ring and / or cover ring which serve for the rotationally fixed connection of the segments with the support or cover ring and therefore with the standpipe. These holding means can consist of holding cams arranged on the support ring and / or on the cover ring and recesses arranged on the segments for the engagement of the holding cams.

Wie erwähnt, kann der aus feuerfestem Keramikmaterial bestehende Abdeckschuh nach der Erfindung verhältnismäßig große Abmessungen aufweisen, so daß er die zugeordnete Bodenöffnung am Ofenboden vollständig oder zumindest weitgehend überdeckt. Dabei kann der Abdeckschuh mit Vorteil so ausgeführt werden, daß sein eines Segment, radial zum Stehrohr gesehen, eine größere Länge aufweist als sein anderes Segment. Das in Radialrichtung längere Segment wird zweckmäßig so ausgebildet, daß es sich zu seinem freien, gerundeten Ende hin in der Breite verjüngt. Die Dicke des erfindungsgemäßen Abdeckschuhs liegt zweckmäßig etwa bei 60 bis 130mm, vorzugsweise bei 90 bis 110mm.As mentioned, the cover shoe made of refractory ceramic material according to the invention can have relatively large dimensions, so that it completely or at least largely covers the associated bottom opening on the furnace bottom. The cover shoe can advantageously be designed so that one segment, seen radially to the standpipe, has a greater length than its other segment. The segment which is longer in the radial direction is expediently designed in such a way that it tapers in width toward its free, rounded end. The thickness of the covering shoe according to the invention is advantageously approximately 60 to 130 mm, preferably 90 to 110 mm.

Weitere Vorteilhafter Gestaltungsmerkmale der Erfindung ergeben sich aus den einzelnen Ansprüchen und der nachfolgenden Beschreibung des in der Zeichnung gezeigten bevorzugten Ausführungsbeispiels der Erfindung. In der Zeichnung zeigen:

Fig. 1
in starker schematischer Vereinfachung und in einem Teilausschnitt einen Hubbalkenofen mit an den Stehrohren des Hubbalkenförderers angeordneten Abdeckschuhen;
Fig. 2
im Vertikalschnitt den Anschlußbereich eines Stehrohrs mit daran angeordneten Abdeckschuh gemäß der Erfindung;
Fig. 3
eine Draufsicht auf den Abdeckschuh nach Fig. 2, wobei das Stehrohr im Horizontalschnitt gezeigt ist;
Fig. 4
eine Ansicht in Richtung des Pfeiles IV der Fig. 3, wobei die beiden Segmente des Abdeckschuhs im Verbindungsbereich aufgebrochen dargestellt sind;
Fig. 5
das eine der beiden Segmente des Abdeckschuhs nach den Fig. 1 bis 4 in Draufsicht;
Fig. 6
einen Schnitt nach Linie VI-VI der Fig. 5;
Fig. 7
das andere Segment des Abdeckschuhs nach den Fig. 1 bis 6 in Draufsicht.
Further advantageous design features of the invention result from the individual claims and the following description of the preferred exemplary embodiment of the invention shown in the drawing. The drawing shows:
Fig. 1
in a greatly schematic simplification and in a partial section, a walking beam furnace with covering shoes arranged on the standing tubes of the walking beam conveyor;
Fig. 2
in vertical section the connection area of a standpipe with cover shoe arranged thereon according to the invention;
Fig. 3
a plan view of the cover shoe of Figure 2, wherein the standpipe is shown in horizontal section.
Fig. 4
a view in the direction of arrow IV of Figure 3, wherein the two segments of the cover shoe are shown broken in the connection area.
Fig. 5
the one of the two segments of the cover shoe according to Figures 1 to 4 in plan view.
Fig. 6
a section along line VI-VI of Fig. 5;
Fig. 7
the other segment of the cover shoe according to FIGS. 1 to 6 in plan view.

In Fig. 1 in starker schematischer Vereinfachung und in einem Teilausschnitt eines Hubbalkenofens die Anordnung der Abdeckschuhe an den von Stehrohren 1 gebildeten vertikalen Einzelstützen des Hubbalkenförderers gezeigt. Die Stehrohre 1 weisen im Ofenraum oberhalb des Ofenbodens 2 eine Ummantelung 3 aus feuerfestem Keramikmaterial auf und sind im übrigen, wie üblich, mit einer Rohrkühlung versehen. Die Stehrohre 1 sind Bestandteil des Balkenherdes, der als Hubbalkenförderer ausgeführt ist. Die Stehrohre, von denen in der Fig. 1 nur zwei gezeigt sind, tragen nicht-dargestellte, sich in Durchlaufrichtung F erstreckende, ggf. durch Querbalken verbundene Hubbalken oder, wie in Fig. 1 vereinfacht dargestellt, Querbalken 4 als Auflager für die im Hubbalkenofen zu erwärmenden Brammen 5 oder sonstige Teile, die beim Durchlauf durch den Hubbalkenofen in Pfeilrichtung F auf die Walztemperatur erwärmt werden. Der Hubbalkenförderer mit den Stehrohren 1 und den von diesen getragenen, das Auflager für die Brammen 5 o.dgl. bildenden Balken führt die im Diagramm nach Fig. 1 angedeutete Arbeitsbewegung in Form einer rechteckigen Umlaufbahn aus, wobei der Vorschubweg in Durchlaufrichtung F durch den Pfeil S und der Rückhub durch den Pfeil R angegeben ist. Die Arbeitsweise des Hubbalkenofens bzw. des Hubbalkenförderers ist bekannt, so daß es insoweit keiner weiteren Erläuterung bedarf.1 shows the arrangement of the covering shoes on the vertical individual supports of the walking beam conveyor formed by standpipes 1 in a greatly schematic simplification and in a partial section of a walking beam furnace. The standpipes 1 have a casing 3 made of refractory ceramic material in the furnace space above the furnace base 2 and are, as usual, provided with tube cooling. The stand pipes 1 are part of the beam hearth, which is designed as a walking beam conveyor. The standpipes, of which only two are shown in FIG. 1, carry lifting beams, not shown, which extend in the direction of passage F and are optionally connected by crossbars or, as shown in simplified form in FIG. 1, crossbars 4 as supports for those in the walking beam furnace to be heated slabs 5 or other parts which are heated to the rolling temperature in the direction of arrow F as they pass through the walking beam furnace. The walking beam conveyor with the stand pipes 1 and the ones carried by them, the support for the slabs 5 or the like. The forming bar executes the working movement indicated in the diagram according to FIG. 1 in the form of a rectangular orbit, the feed path in the direction of passage F is indicated by arrow S and the return stroke is indicated by arrow R. The operation of the walking beam furnace or the walking beam conveyor is known, so that no further explanation is required.

Wesentlich ist, daß die Stehrohre 1 mit ihren unteren Endbereichen Öffnungen 6 am Ofenboden 2 durchfassen, wobei diese Öffnungen etwa schlitzartig so ausgeführt sind, daß die Arbeitsbewegungen des Hubbalkenförderers und seiner Stehrohre 1 entsprechend dem gezeigten Diagramm möglich sind. Die Öffnungen 6 weisen also in Durchlaufrichtung F eine Länge auf, die gleich oder etwas größer ist als der Vorschubweg S. Unterhalb des Ofenbodens kann sich der Antrieb des Hubbalkenförderers zusammen mit weiteren Betriebseinrichtungen befinden. Zur Abdeckung der Öffnungen 6 und damit zum Schutz der unterhalb des Ofenbodens 2 befindlichen Betriebseinrichtungen vor übermäßigen Wärmebeanspruchungen durch Wärmestrahlung sowie zur Vermeidung von übermäßigen Wärmeverlusten sind an den Stehrohren 1 Abdeckschuhe 7 angeordnet, welche die Bodenöffnungen 6 überdecken und die erfindungsmäß aus einem hochhitzebeständigen Keramikmaterial bestehen, vorzugsweise einem solchen mit hoher Temperaturwechselbeständigkeit.It is essential that the upright tubes 1 with their lower end regions pass through openings 6 on the furnace floor 2, these openings being approximately slit-like in such a way that the working movements of the walking beam conveyor and its upright tubes 1 are possible in accordance with the diagram shown. The openings 6 thus have a length in the direction of passage F which is the same or slightly larger than the feed path S. The drive of the walking beam conveyor together with further operating devices can be located below the furnace floor. In order to cover the openings 6 and thus to protect the operating devices located below the furnace floor 2 against excessive thermal stresses from heat radiation and to avoid excessive heat losses, cover shoes 7 are arranged on the stand pipes 1, which cover the floor openings 6 and which, according to the invention, consist of a highly heat-resistant ceramic material, preferably one with high thermal shock resistance.

Eine bevorzugte Ausführungsform eines solchen Abdeckschuhs 7 ist in den Fig. 2 bis 7 gezeigt. Hierbei ist jeder Abdeckschuh 7 zweiteilig ausgeführt. Er setzt sich zusammen aus zwei Segmenten 8 und 9, die jeweils aus dem hochhitzebeständigen Keramikmaterial gefertigt sind und die am Stehrohr 1 angebaut und zu dem Abdeckschuh zusammengefügt werden.A preferred embodiment of such a cover shoe 7 is shown in FIGS. 2 to 7. Here, each cover shoe 7 is made in two parts. It is composed of two segments 8 and 9, each of which is made of the highly heat-resistant ceramic material and which are attached to the standpipe 1 and joined together to form the cover shoe.

In den Fig. 2 bis 4 ist die bis dicht an den Abdeckschuh 7 heranreichende Keramikummantelung des Stehrohrs 1 nicht gezeigt. Am Stehrohr 1 ist als Auflager für den Abdeckschuh 7 ein Stützring 10 und im Abstand darüber ein Abdeckring 11 z.B. durch Schweißen befestigt. Der Stützring 10 und der Abdeckring 11 weisen jeweils nur eine verhältnismäßig kleine radiale Breite auf. Sie liegen daher noch im Kühlbereich der Stehrohrkühlung. Der vertikalabstand zwischen Stützring 10 und Abdeckring 11 entspricht im wesentlichen der Dicke des Abdeckschuhs 7 bzw. seiner Segmente 8 und 9. Der Stützring 10 und der Abdeckring 11 bilden eine das Stehrohr 1 ringförmig umschließende Aufnahmetasche für die Segmente 8 und 9 des Abdeckschuhs 7.2 to 4, the ceramic sheathing of the standpipe 1, which comes close to the cover shoe 7, is not shown. A support ring 10 and a cover ring 11 at a distance above it, for example by welding, are fastened to the standing tube 1 as a support for the cover shoe 7. The support ring 10 and the cover ring 11 each have only a relatively small radial width. They are therefore still in the cooling area of the standpipe cooling. Of the The vertical distance between the support ring 10 and the cover ring 11 corresponds essentially to the thickness of the cover shoe 7 or its segments 8 and 9. The support ring 10 and the cover ring 11 form a receiving pocket for the segments 8 and 9 of the cover shoe 7 which surrounds the standing tube 1 in a ring.

Die Segmente 8 und 9 ragen über den Umfang des Stützrings 10 und des Abdeckrings 11 hinaus. Dabei weist das Segment 8 in seiner Breite und in seiner Längsrichtung, also radial zum Stehrohr 1 erheblich größere Abmessungen auf als das Segment 9. Das Segment 8 verjüngt sich in Durchlaufrichtung F (Fig. 1) zu seinem freien, gerundeten Ende 8' hin in der Breite. Die Dicke der beiden Segmente 8 und 9 beträgt zweckmäßig etwa 90 bis 110mm, kann aber auch von diesem Dickenmaß nach oben oder unten abweichen.The segments 8 and 9 protrude beyond the circumference of the support ring 10 and the cover ring 11. The segment 8 in its width and in its longitudinal direction, that is to say radially to the standing tube 1, has considerably larger dimensions than the segment 9. The segment 8 tapers in the direction of passage F (FIG. 1) towards its free, rounded end 8 ′ the width. The thickness of the two segments 8 and 9 is expediently approximately 90 to 110 mm, but can also deviate up or down from this thickness dimension.

Jedes der beiden Segmente 8 und 9 weist eine dem Durchmesser des Stehrohres 1 angepaßte etwa halbzylindrische Ausformung 12 bzw. 13 auf, die gemeinsam die Stehrohrdurchführung bilden. Das Segment 8 weist an seiner dem freien Ende 8' gegenüberliegenden Rückseite eine randseitig offene angeformte Einsteckgabel 14 mit den beiden parallelen Gabelwangen 15 auf, wobei am Grund der Einsteckgabel 14 die halbzylindrische Ausformung 12 angeformt ist, die mit der halbzylindrischen Ausformung 13 des anderen Segments 9 die Stehrohrdurchführung bildet. Die Einsteckgabel 15 bildet somit eine randseitig offene Einstecktasche, in die das andere Segment 9 nach Art eines Steckriegels oder Verschlußstücks mit Formschluß einführbar ist, wie dies vor allem die Fig. 2 bis 4 zeigen.Each of the two segments 8 and 9 has an approximately semi-cylindrical shape 12 or 13 which is adapted to the diameter of the standing tube 1 and which together form the standing tube bushing. The segment 8 has on its rear side opposite the free end 8 'an integrally formed insertion fork 14 with the two parallel fork cheeks 15, with the bottom of the insertion fork 14 having the semi-cylindrical shape 12 formed on it with the semi-cylindrical shape 13 of the other segment 9 the standpipe bushing forms. The insertion fork 15 thus forms an insertion pocket which is open on the edge and into which the other segment 9 can be inserted in the manner of a locking bolt or locking piece with positive locking, as is shown above all in FIGS. 2 to 4.

Wie in den Fig. 4 bis 7 gezeigt ist, sind an den Gabelschenkeln 15 des Segments 8 innenseitig und an deren Öffnungsbereich kurze, etwa halbkreisförmige Nuten 16 und an den beiden parallelen Seitenrändern des anderen Segments 9 außenseitig entsprechend geformte Federelemente 17 angeformt, die Nut-Federverbindungen bilden. Beim Einstecken des Segments 9 in die Einsteckgabel 14 des anderen Segments 8 schieben sich die Federelemente 17 in die Nuten 16, wodurch eine formschlüssige Schiebeverbindung zwischen den Segmenten bewirkt wird. Insbesondere die Fig. 2 und 3 zeigen, daß an dem Stützring 10 auf diametral einander gegenüberliegenden Seiten nach oben aufragende Haltenocken 18 befestigt sind, die bei am Stehrohr 1 montiertem Abdeckschuh 7 in Ausnehmungen 19 von unten einfassen, die, wie auch die Fig. 5 bis 7 erkennen lassen, mittig und an der Unterseite der halbzylindrischen Ausformungen 12 und 13 angeordnet und einerseits zur Unterseite der Segmente 8 und 9 und zur Innenseite der halbzylindrischen Ausformungen offen sind. Beim Einschieben der Segmente 8 und 9 in die von dem Stützring 10 und dem Abdeckring 11 gebildete Aufnahmetasche schieben sich die Haltenocken 18 in die an den Segmenten 8 und 9 angeformten Ausnehmungen 19, wodurch die Segmente in Ausrichtung zueinander gegenüber dem Stehrohr 1 drehfest gehalten werden.As shown in FIGS. 4 to 7, short, approximately semicircular grooves 16 are formed on the inside of the fork legs 15 of the segment 8 and on their opening area, and correspondingly shaped spring elements 17 are formed on the outside on the two parallel side edges of the other segment 9. Form spring connections. When the segment 9 is inserted into the insertion fork 14 of the other segment 8, the spring elements 17 slide into the grooves 16, whereby a positive sliding connection between the segments is effected. 2 and 3 in particular show that retaining cams 18 which project upwards on diametrically opposite sides are fastened to the support ring 10 and, when the cover shoe 7 is mounted on the standpipe 1, engage in recesses 19 from below which, like FIG. 5 7 to 7 can be seen, arranged in the middle and on the underside of the semi-cylindrical formations 12 and 13 and, on the one hand, are open to the underside of the segments 8 and 9 and to the inside of the semi-cylindrical formations. When the segments 8 and 9 are inserted into the receiving pocket formed by the support ring 10 and the cover ring 11, the retaining cams 18 slide into the recesses 19 formed on the segments 8 and 9, as a result of which the segments are held in a rotationally fixed manner in relation to one another with respect to the standing tube 1.

Die Verbindung der Segmente 8 und 9 untereinander und damit auch mit dem Stehrohr 1 erfolgt mit Hilfe von Verbindungselementen, die ebenfalls aus einem hochhitzebeständigen Keramikmaterial gefertigt sind. Wie vor allem die Fig. 3 und 4 zeigen, bestehen diese Verbindungselemente aus zylindrischen Steckbolzen 20, die von oben in etwa halbzylindrische Taschenausformungen 21, 22 der Segmente 8 und 9 eingesteckt werden, wodurch diese in ihrer Anbaulage am Stehrohr 1 lösbar miteinander verbunden werden. Die Taschenausformungen 21 befinden sich an den Gabelschenkeln 15 des Segments 8 oberhalb der angeformten Nuten 16 (Fig. 4), während die korrespondierenden halbzylindrischen Taschenausformungen 22 an den beiden gegenüberliegenden Seiten des Segments 9, oberhalb der Federelemente 17 angeordnet sind.The connection of the segments 8 and 9 with each other and thus also with the standpipe 1 takes place with the aid of connecting elements, which are also made of a highly heat-resistant ceramic material. 3 and 4 in particular, these connecting elements consist of cylindrical socket pins 20 which are inserted from above into approximately semi-cylindrical pocket shapes 21, 22 of the segments 8 and 9, as a result of which they are detachably connected to one another in their mounting position on the standing tube 1. The pocket formations 21 are located on the fork legs 15 of the segment 8 above the molded grooves 16 (FIG. 4), while the corresponding semi-cylindrical pocket formations 22 are arranged on the two opposite sides of the segment 9, above the spring elements 17.

Bei der Montage des Abdeckschuhs 7 kann zunächst das größere Segment 8 von der einen Seite her in die von dem Stützring 10 und dem Abdeckring 11 gebildete Aufnahmetasche eingeführt werden, wobei es sich mit seiner Zentrierausnehmung 19 in den Haltenocken 18 schiebt. Anschließend kann dann von der gegenüberliegenden Seite her das kleinere Segment 9 in die Aufnahmetasche und die Einsteckgabel 14 eingeführt werden, wobei die Nut-Federverbindungen 16, 17 eine formschlüssige Verbindung und Führung bewirken. Im eingesteckten Zustand ist das Segment 9 durch den Eingriff des Haltenockens 18 in seiner Ausnehmung 19 gegenüber dem Stehrohr 1 gegen Drehung verriegelt. Anschließend können dann die keramischen Steckbolzen 20 von oben in die von den korrespondierenden Taschenausnehmungen 21, 22 gebildeten Einstecktaschen eingesteckt werden, wodurch die beiden Segmente 8 und 9 untereinander verbunden und am Stehrohr 1 festgelegt werden.When the cover shoe 7 is installed, the larger segment 8 can first be inserted from one side into the receiving pocket formed by the support ring 10 and the cover ring 11, with its centering recess 19 being pushed into the holding cams 18. The smaller segment 9 can then be inserted into the receiving pocket from the opposite side and the insertion fork 14 are inserted, the tongue and groove connections 16, 17 effecting a positive connection and guidance. In the inserted state, the segment 9 is locked against rotation by the engagement of the holding cam 18 in its recess 19 with respect to the standpipe 1. The ceramic plug pins 20 can then be inserted from above into the insertion pockets formed by the corresponding pocket recesses 21, 22, as a result of which the two segments 8 and 9 are connected to one another and fixed on the standpipe 1.

Die Erfindung ist auf das vorstehend beschriebene bevorzugte Ausführungsbeispiel des Abdeckschuhs 7 nicht beschränkt. Beispielsweise könnte der Abdeckschuh 7 auch aus mehr als zwei Segmenten, z.B. drei Segmenten, bestehen oder bei zweiteiliger Ausführung von zwei Halbteilen gebildet sein, beispielsweise derart, daß er entlang seiner Längsmittelachse geteilt ist, wobei die beiden Halbteile zweckmäßig ebenfalls durch Steckverbindungen o.dgl. verbunden werden.The invention is not limited to the preferred exemplary embodiment of the covering shoe 7 described above. For example, the cover shoe 7 could also consist of more than two segments, e.g. three segments, or be formed in a two-part design from two half-parts, for example in such a way that it is divided along its longitudinal central axis, the two half-parts also expediently or similarly by plug connections. get connected.

Claims (21)

Abdeckschuh, der am Stehrohr des Hubbalkenförderers eines Hubbalkenofens angeordnet und eine vom Stehrohr durchgriffene Öffnung des Ofenbodens überdeckt, dadurch gekennzeichnet, daß der Abdeckschuh (7) aus einem hochhitzebeständigen Keramikmaterial besteht und aus mehreren Segmenten (8, 9) zusammengesetzt ist.Covering shoe which is arranged on the standing tube of the walking beam conveyor of a walking beam furnace and covers an opening of the furnace floor penetrated by the standing tube, characterized in that the covering shoe (7) consists of a highly heat-resistant ceramic material and is composed of several segments (8, 9). Abdeckschuh nach Anspruch 1, dadurch gekennzeichnet, daß das Stehrohr (1) mit einem Auflager (10) für den Abdeckschuh (7) versehen ist.Cover shoe according to claim 1, characterized in that the standing tube (1) is provided with a support (10) for the cover shoe (7). Abdeckschuh nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß seine Segmente (8, 9), vorzugsweise durch eine Steckverbindung, lösbar verbunden sind.Covering shoe according to claim 1 or 2, characterized in that its segments (8, 9) are detachably connected, preferably by a plug connection. Abdeckschuh nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er aus zwei Segmenten (8, 9) besteht.Cover shoe according to one of claims 1 to 3, characterized in that it consists of two segments (8, 9). Abdeckschuh nach Anspruch 4, dadurch gekennzeichnet, daß jedes der beiden Segmente (8, 9) eine etwa halbzylindrische Ausformung (12, 13) aufweist, wobei die beiden Ausformungen gemeinsam die Stehrohrdurchführung bilden.Covering shoe according to claim 4, characterized in that each of the two segments (8, 9) has an approximately semi-cylindrical shape (12, 13), the two shapes jointly forming the standpipe bushing. Abdeckschuh nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß das Auflager des Stehrohrs (1) von einem, vorzugsweise aus Stahl oder Stahlguß bestehenden Stützring (10) gebildet ist.Covering shoe according to one of claims 2 to 5, characterized in that the support of the standing tube (1) is formed by a support ring (10) preferably made of cast steel or cast steel. Abdeckschuh nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß am Stehrohr (1) ein den Abdeckschuh (7) übergreifender, vorzugsweise aus Stahl oder Stahlguß bestehender Abdeckring (11) angeordnet ist.Covering shoe according to one of claims 1 to 6, characterized in that a covering ring (11), preferably made of cast steel or cast steel, is arranged over the covering shoe (7) on the standing tube (1). Abdeckschuh nach den Ansprüchen 6 und 7, dadurch gekennzeichnet, daß der Stützring (10) und der Abdeckring (11) eine Aufnahmetasche für die Segmente (8, 9) des Abdeckschuhs bilden.Cover shoe according to claims 6 and 7, characterized in that the support ring (10) and the cover ring (11) form a receiving pocket for the segments (8, 9) of the cover shoe. Abdeckschuh nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eines der Segmente (8, 9) eine randseitig offene Einstecktasche aufweist, in die das andere Segment (9) nach Art eines Steckriegels einsteckbar ist.Covering shoe according to one of claims 1 to 8, characterized in that one of the segments (8, 9) has an insertion pocket which is open on the edge and into which the other segment (9) can be inserted in the manner of a locking bolt. Abdeckschuh nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß seine Segmente (8, 9) mittels an diesen angeformter Nut-Federverbindungen (16, 17) formschlüssig miteinander verbunden sind.Covering shoe according to one of claims 1 to 9, characterized in that its segments (8, 9) are positively connected to one another by means of tongue-and-groove connections (16, 17) molded thereon. Abdeckschuh nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß seine Segmente (8, 9) mittels Verbindungselemente (20) aus keramischem Material verbunden bzw. verbindbar sind.Covering shoe according to one of claims 1 to 10, characterized in that its segments (8, 9) are connected or connectable by means of connecting elements (20) made of ceramic material. Abdeckschuh nach Anspruch 11, dadurch gekennzeichnet, daß die Verbindungselemente aus Steckbolzen (20) bestehen, und daß die Segmente (8, 9) Taschenausformungen (21, 22) aufweisen, die paarweise eine, vorzugsweise zylindrische, Bolzentasche für den Steckbolzen (20) bilden.Covering shoe according to claim 11, characterized in that the connecting elements consist of plug pins (20) and that the segments (8, 9) have pocket shapes (21, 22) which in pairs form a, preferably cylindrical, pin pocket for the plug pin (20) . Abdeckschuh nach einem der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß am Stützring (10) und/oder Abdeckring (11) der drehfesten Verbindung der Segmente (8, 9) mit dem Stehrohr (1) dienende Haltemittel (18, 19) angeordnet sind.Covering shoe according to one of claims 6 to 12, characterized in that the non-rotatable connection of the segments (8, 9) on the support ring (10) and / or cover ring (11) with the standpipe (1) serving holding means (18, 19) are arranged. Abdeckschuh nach Anspruch 13, dadurch gekennzeichnet, daß die genannten Haltemittel aus am Stützring (10) und/oder Abdeckring (11) angeordneten Haltenocken (18) und an den Segmenten (8, 9) angeformten Ausnehmungen (19) für den Eingriff der Haltenocken bestehen.Covering shoe according to claim 13, characterized in that said holding means consist of holding cams (18) arranged on the support ring (10) and / or cover ring (11) and recesses (19) formed on the segments (8, 9) for the engagement of the holding cams . Abdeckschuh nach einem der Ansprüche 4 bis 14, dadurch gekennzeichnet, daß das eine Segment (8) als eine zu seiner Rückseite offene Einsteckgabel (14) geformt ist, an deren Grund die halbzylindrische Ausformung angeordnet ist, die mit der halbzylindrischen Ausformung (13) des anderen, als Steckriegel in die Einsteckgabel (14) einführbaren Segments (9) die Rohrdurchführung bildet.Covering shoe according to one of claims 4 to 14, characterized in that the one segment (8) is shaped as an insertion fork (14) which is open to its rear, at the bottom of which the semi-cylindrical shape is arranged, which with the semi-cylindrical shape (13) of the another segment (9) that can be inserted as a locking bolt into the insertion fork (14) forms the pipe bushing. Abdeckschuh nach Anspruch 15, dadurch gekennzeichnet, daß die Haltemittel bzw. die dem Eingriff der Haltenocken (18) dienenden Ausnehmungen (19) an den halbzylindrischen Ausformungen (12, 13) mittig angeordnet sind.Covering shoe according to claim 15, characterized in that the holding means or the recesses (19) serving for the engagement of the holding cams (18) are arranged centrally on the semi-cylindrical formations (12, 13). Abdeckschuh nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß das eine Segment (8) radial zum Stehrohr (1) gesehen, eine größere Länge aufweist als das andere Segment (9).Covering shoe according to one of claims 1 to 16, characterized in that one segment (8), seen radially to the standing tube (1), has a greater length than the other segment (9). Abdeckschuh nach Anspruch 17, dadurch gekennzeichnet, daß das radial längere Segment (8) sich zu seinem freien, gerundeten Ende (8') hin in der Breite verjüngt.Covering shoe according to claim 17, characterized in that the radially longer segment (8) tapers in width towards its free, rounded end (8 '). Abdeckschuh nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß er eine Dicke von 60 bis 130mm, vorzugsweise 90 bis 110mm, aufweist.Covering shoe according to one of claims 1 to 18, characterized in that it has a thickness of 60 to 130mm, preferably 90 to 110mm. Abdeckschuh nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, daß er aus einem Keramikmaterial von hoher Temperaturwechselbeständigkeit besteht.Covering shoe according to one of claims 1 to 19, characterized in that it consists of a ceramic material with high thermal shock resistance. Abdeckschuh nach einem der Ansprüche 1 bis 29, dadurch gekennzeichnet, daß er das am Stützrohr (1) angeordnete, von dem Stützring (10) gebildete Auflager über den gesamten Stützringumfang radial übergreift.Covering shoe according to one of claims 1 to 29, characterized in that it radially overlaps the support arranged on the support tube (1) and formed by the support ring (10) over the entire circumference of the support ring.
EP95116317A 1994-11-11 1995-10-17 Shield used on the beam conveyor of a walking beam furnace Withdrawn EP0711970A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440275 1994-11-11
DE19944440275 DE4440275A1 (en) 1994-11-11 1994-11-11 Cover shoe for use on the walking beam conveyor of a walking beam furnace

Publications (1)

Publication Number Publication Date
EP0711970A1 true EP0711970A1 (en) 1996-05-15

Family

ID=6533039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116317A Withdrawn EP0711970A1 (en) 1994-11-11 1995-10-17 Shield used on the beam conveyor of a walking beam furnace

Country Status (2)

Country Link
EP (1) EP0711970A1 (en)
DE (1) DE4440275A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3757497A1 (en) * 2019-06-24 2020-12-30 Intocast AG Radiation shoe
WO2022156932A1 (en) * 2021-01-21 2022-07-28 Andritz Metals Germany Gmbh Shielding shoe for walking beam furnaces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021113043A1 (en) 2021-05-19 2022-11-24 Loi Thermprocess Gmbh Covering device for use in a walking beam furnace

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581936A (en) * 1967-10-25 1969-09-19
JPS59200717A (en) * 1983-04-28 1984-11-14 Nippon Steel Corp Shielding construction in aperture part of moving beam post of billet heating furnace
FR2566516A1 (en) * 1984-06-21 1985-12-27 Gautschi Electro Fours Sa Continuous furnace for metal objects
EP0280079A1 (en) * 1987-02-24 1988-08-31 ITALIMPIANTI Società Italiana Impianti p.a. Walking beam furnace
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
JPH05163547A (en) * 1991-12-12 1993-06-29 Kubota Corp Member for supporting cover for opening part at furnace hearth

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581936A (en) * 1967-10-25 1969-09-19
JPS59200717A (en) * 1983-04-28 1984-11-14 Nippon Steel Corp Shielding construction in aperture part of moving beam post of billet heating furnace
FR2566516A1 (en) * 1984-06-21 1985-12-27 Gautschi Electro Fours Sa Continuous furnace for metal objects
EP0280079A1 (en) * 1987-02-24 1988-08-31 ITALIMPIANTI Società Italiana Impianti p.a. Walking beam furnace
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
JPH05163547A (en) * 1991-12-12 1993-06-29 Kubota Corp Member for supporting cover for opening part at furnace hearth

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI 14 October 1993 Derwent World Patents Index; AN 17567 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 66 (C - 271)<1789> 26 March 1985 (1985-03-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3757497A1 (en) * 2019-06-24 2020-12-30 Intocast AG Radiation shoe
WO2022156932A1 (en) * 2021-01-21 2022-07-28 Andritz Metals Germany Gmbh Shielding shoe for walking beam furnaces

Also Published As

Publication number Publication date
DE4440275A1 (en) 1996-05-15

Similar Documents

Publication Publication Date Title
DE3106741C2 (en) Contact electrode arrangement for arc or resistance melting furnace
DE2255069B2 (en) DRUM FOR THERMAL TREATMENT OF WEARING GOODS
DE3019811C2 (en) Discharge controller for a melting furnace
EP0137961B1 (en) Withdrawing device for a gas bubbling plug
DD158937A5 (en) TURN SLIDING FOR METALLURGIC MELTING FAIRS
EP0184021A1 (en) Transport device to support the charge in a heat treatment kiln
DE2243154A1 (en) CHAIN FOR A RUST CONVEYOR
EP0711970A1 (en) Shield used on the beam conveyor of a walking beam furnace
EP2516086B1 (en) Sliding closure for a metallurgical container
EP0012398A1 (en) Rotary drum
DE4229055A1 (en) Device for the transport of products, in particular hollow glass articles to be transported out of a glass production machine
DE8525458U1 (en) Electrically heated furnace for carrying out a heat treatment
DE4010353C2 (en)
DE4138091A1 (en) TUBULAR WATER-COOLED COAT FOR OEFEN
DE2607265C3 (en) Device for cooling castings and molding sand
DE4202961C2 (en) Chisel holder
DE3440433C2 (en) Control device for the hot wind throughput in a shaft furnace nozzle block, in particular blast furnace nozzle block, and nozzle block equipped with such a device
EP1673481B1 (en) Industrial furnace and associated jet element
DE10033966C1 (en) Metallurgical device used for transporting molten metals has an insulating layer arranged in the region of a tappet shield between the outer lining and the inner side of the shield
DE176392C (en)
DE2816413C2 (en) Heated sprue bushing for a plastic injection mold
DE1806204C3 (en) Low pressure pouring device
DE919413C (en) Log heat furnace
DE3242321A1 (en) ARRANGEMENT FOR FASTENING A RUNNING RING ON THE SHEATH OF A TURNTUBE
DE867265C (en) Ceramic support elements for holding the resistance wires in the electrically heated furnace

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR IT

17P Request for examination filed

Effective date: 19960805

17Q First examination report despatched

Effective date: 19990126

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010601