EP0742417A1 - Ceramic beam for tunnel furnace wagon - Google Patents

Ceramic beam for tunnel furnace wagon Download PDF

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Publication number
EP0742417A1
EP0742417A1 EP96102874A EP96102874A EP0742417A1 EP 0742417 A1 EP0742417 A1 EP 0742417A1 EP 96102874 A EP96102874 A EP 96102874A EP 96102874 A EP96102874 A EP 96102874A EP 0742417 A1 EP0742417 A1 EP 0742417A1
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EP
European Patent Office
Prior art keywords
ceramic
beam according
carrier
underside
width
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Granted
Application number
EP96102874A
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German (de)
French (fr)
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EP0742417B1 (en
Inventor
Volker Dr. Hesse
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BURTON GMBH
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BURTON-WERKE GmbH and Co KG
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Publication of EP0742417A1 publication Critical patent/EP0742417A1/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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D3/123—Furnace cars

Definitions

  • the invention relates to a ceramic beam for tunnel kiln kiln cars according to the preamble of claim 1.
  • Known kiln car beams are designed as rectangular or square hollow or solid profiles made of ceramic.
  • the beams serve as cross beams for the ceramic superstructure of the kiln for receiving items to be burned, eg cassettes with roof tiles to be fired.
  • the beams of the kiln car rest on ceramic supports at their edge areas, so that there is a bending stress on the ceramic material.
  • the lower area of the ceramic profile is subjected to tension, the top to pressure.
  • the known bars are relatively heavy, which has an adverse effect on the energy balance in the heating process of the kiln in a tunnel kiln in which a temperature of 1000 to 1200 ° C prevails.
  • the invention is concerned with the problem of creating a ceramic beam for tunnel kiln kiln cars which is distinguished by improved static properties with regard to the bending stress as well as by a reduced weight and a larger span.
  • the formation of the ceramic beam as a solid support with a trapezoidal shape in side view creates an improved shape against stresses caused by bending moments.
  • the forces that occur can be distributed within the trapezoidal beam, which results in lower internal stresses and thus results in an increased flexural strength of the beam.
  • the trapezoidal shape results in a material saving, so that less energy is required to heat the ceramic superstructure of the kiln and an enlarged span of the beams can be realized.
  • a tunnel kiln kiln car shown schematically in Fig. 1 for the transport of combustible goods such as roof tiles through a tunnel kiln consists of a metallic chassis, not shown here, and a ceramic superstructure, which is used for thermal insulation of the metallic chassis when driving through the kiln through the tunnel kiln and for Recording of the fired goods is used.
  • the ceramic superstructure is provided with bars 1, which serve as cross members, for example for receiving cassettes in which the fuel items are stored, such as roof tiles.
  • the beams 1 of the kiln are at their end regions 2, 3 on ceramic longitudinal beams 4, which in turn are supported on ceramic supports 5. The support of the beams 1 at their end regions 2, 3 and the inclusion of the firing goods result in a bending stress on the beams.
  • a first embodiment of the bar 1 is shown in more detail. It consists of an elongated carrier 6, which has a trapezoidal shape in side view. The top 7 runs in a horizontal plane, while the bottom 8 forms the trapezoidal shape. As illustrated in FIG. 3, the width of the upper side 7 decreases compared to the lower side 8 from the end regions 2, 3 to the center of the trapezoidal shape, so that the side surfaces 9 of the carrier 6 run as skewed planes. As can be seen from FIG. 4, the carrier 6 is of solid construction overall, which has a favorable effect on the distribution of forces and enables the use of the dry pressing method.
  • the carrier 6 Since the upper side 7 of the carrier 6 is subjected to pressure and the lower side 8 to tension, there is a zone in the middle area where the compressive stress of the upper belt and the tensile stress of the lower belt essentially compensate and, above all, shear stresses occur. It is therefore provided to provide the carrier 6 with material recesses 10 in this area, whereby considerable material savings can be achieved without reducing the flexural strength of the beam. Overall, the trapezoidal shape and the upwardly tapering design of the carrier 6 and the recesses 10, which are expediently designed as through holes, result in considerable material savings (up to 40%) compared to the previously known solid or hollow profile beams.
  • the bar 1 is provided at its end regions 2, 3 with parallelepiped-shaped lugs 11, which serve to support the bar 1 on the longitudinal bar 4 of the kiln.
  • parallelepiped-shaped lugs 11 serve to support the bar 1 on the longitudinal bar 4 of the kiln.
  • the beam 1 in turn comprises a solid ceramic carrier 14, which has a trapezoidal shape in side view.
  • the carrier 14 is reversely T-shaped in cross section, the underside 15 forming the transverse web 16 of the T-shape, while the upper side 17 is formed by the end face of the vertical T-web 18 .
  • the width of the underside 15 increases from the end regions 20, 21 of the carrier 14 to the center of the trapezoidal shape, while the width of the top 17 is constant over the entire length of the beam 1.
  • the underside 15 has a horizontally rectilinear course, so that a secure support of the bar 1 on the longitudinal bar 4 is ensured. Furthermore, this support 14 is also in the area of the neutral zone with material recesses 22 in the form of e.g. Provide holes for further material savings.
  • the shape of the ceramic beam for a tunnel kiln which is optimized with regard to static loads, can therefore counteract the material fatigue caused by bending stress and, moreover, a considerable weight reduction can be achieved, which has a positive effect on the energy balance during the heating process of the kiln.
  • the first described embodiment is also easy to manufacture and inexpensive to manufacture.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

Ceramic beam, for a tunnel kiln car with a wheeled metal chassis and an insulating ceramic superstructure for holding ware to be fired, consists of a solid ceramic girder (1) of trapezoidal shape with the compressively stressed upper side extending in a horizontal plane, while the tensile stressed underside forms the trapeze shape.

Description

Die Erfindung bezieht sich auf einen keramischen Balken für Tunnelofen-Brennwagen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a ceramic beam for tunnel kiln kiln cars according to the preamble of claim 1.

Bekannte Brennwagen-Balken sind als rechteckige oder quadratische Hohl- oder Vollprofile aus Keramik ausgebildet. Die Balken dienen als Querträger des keramischen Überbaus des Brennwagens zur Aufnahme von Brenngut, z.B. Kassetten mit zu brennenden Dachziegeln. Die Balken des Brennwagens liegen an ihren Randbereichen jeweils auf keramischen Stützen auf, so daß sich eine Biegebeanspruchung des keramischen Materials ergibt. Der untere Bereich des Keramikprofils wird dabei auf Zug, die Oberseite auf Druck beansprucht. Da jedoch die Druckfestigkeit von Keramik wesentlich höher als die Zugfestigkeit ist, kann es zu Materialermüdungen kommen. Darüber hinaus sind die bekannten Balken relativ schwer, was sich beim Aufheizprozeß des Brennwagens in einem Tunnelofen, in dem eine Temperatur von 1000 bis 1200° herrscht, nachteilig in der Energiebilanz auswirkt. Darüber hinaus können daher nur relativ geringe Spannweiten realisiert werden, so daß eine hohe Anzahl an Stützen benötigt wird.Known kiln car beams are designed as rectangular or square hollow or solid profiles made of ceramic. The beams serve as cross beams for the ceramic superstructure of the kiln for receiving items to be burned, eg cassettes with roof tiles to be fired. The beams of the kiln car rest on ceramic supports at their edge areas, so that there is a bending stress on the ceramic material. The lower area of the ceramic profile is subjected to tension, the top to pressure. However, since the compressive strength of ceramics is significantly higher than the tensile strength, material fatigue can occur. In addition, the known bars are relatively heavy, which has an adverse effect on the energy balance in the heating process of the kiln in a tunnel kiln in which a temperature of 1000 to 1200 ° C prevails. In addition, you can therefore only relatively small spans can be realized, so that a high number of supports is required.

Die Erfindung befaßt sich mit dem Problem, einen keramischen Balken für Tunnelofen-Brennwagen zu schaffen, der sich durch verbesserte statische Eigenschaffen bezüglich der Biegebeanspruchung sowie durch ein verringertes Gewicht und eine größere Spannweite auszeichnet.The invention is concerned with the problem of creating a ceramic beam for tunnel kiln kiln cars which is distinguished by improved static properties with regard to the bending stress as well as by a reduced weight and a larger span.

Die Erfindung löst dieses Problem mit den im Anspruch 1 angegebenen Merkmalen.The invention solves this problem with the features specified in claim 1.

Durch die Ausbildung des keramischen Balkens als massiver Träger mit in Seitenansicht trapezförmiger Gestalt ist eine verbesserte Form gegenüber Beanspruchungen durch Biegemomente geschaffen. Die auftretenden Kräfte können sich innerhalb des trapezförmig ausgebildeten Trägers verteilen, woraus geringere innere Spannungen resultieren und sich somit eine erhöhte Biegefestigkeit des Balkens ergibt. Darüber hinaus ergibt sich durch die Trapezform eine Materialeinsparung, so daß weniger Energie zum Aufheizen des keramischen Überbaus des Brennwagens benötigt wird sowie eine vergrößerte Spannweite der Balken realisiert werden kann.The formation of the ceramic beam as a solid support with a trapezoidal shape in side view creates an improved shape against stresses caused by bending moments. The forces that occur can be distributed within the trapezoidal beam, which results in lower internal stresses and thus results in an increased flexural strength of the beam. In addition, the trapezoidal shape results in a material saving, so that less energy is required to heat the ceramic superstructure of the kiln and an enlarged span of the beams can be realized.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung. In der Zeichnung zeigen:

Fig. 1
eine perspektivische Teildarstellung eines Tunnelofen-Brennwagens mit keramischen Balken nach der Erfindung;
Fig. 2
eine Seitenansicht eines keramischen Balkens aus Fig. 1;
Fig. 3
eine untere Ansicht des keramischen Balkens nach Fig. 2;
Fig. 4
einen Schnitt nach der Linie IV-IV in Fig. 2;
Fig. 5
eine Seitenansicht einer zweiten Ausführungsform eines keramischen Balkens für Tunnelofen-Brennwagen nach der Erfindung;
Fig. 6
eine Draufsicht auf den keramischen Brennwagen nach Fig. 5;
Fig. 7
einen Schnitt nach der Linie VII-VII in Fig. 5;
Fig. 8
einen Schnitt nach der Linie VIII-VIII in Fig. 5.
Further details and advantages of the invention result from the following description and the drawing. The drawing shows:
Fig. 1
a partial perspective view of a tunnel kiln car with ceramic beams according to the invention;
Fig. 2
a side view of a ceramic beam of Fig. 1;
Fig. 3
a bottom view of the ceramic bar of FIG. 2;
Fig. 4
a section along the line IV-IV in Fig. 2;
Fig. 5
a side view of a second embodiment of a ceramic beam for tunnel kiln kiln according to the invention;
Fig. 6
a plan view of the ceramic kiln according to Fig. 5;
Fig. 7
a section along the line VII-VII in Fig. 5;
Fig. 8
a section along the line VIII-VIII in Fig. 5th

Ein in Fig. 1 schematisch dargestellter Tunnelofen-Brennwagen für den Transport von Brenngütern wie Dachziegel durch einen Tunnelofen besteht aus einem hier nicht näher dargestellten metallischen Chassis sowie einem keramischen Überbau, der zur thermischen Isolierung des metallischen Chassis beim Durchfahren des Brennwagens durch den Tunnelofen und zur Aufnahme der Brenngüter dient. Hierzu ist der keramische Überbau mit Balken 1 versehen, die als Querträger beispielsweise zur Aufnahme von Kassetten, in denen die Brenngüter wie Dachziegel gelagert sind, dienen. Die Balken 1 des Brennwagens liegen an ihren Endbereichen 2, 3 auf keramischen Längsbalken 4 auf, die sich ihrerseits auf keramischen Stützen 5 abstützen. Durch die Auflage der Balken 1 an ihren Endbereichen 2, 3 und die Aufnahme der Brenngüter ergibt sich eine Biegebeanspruchung der Balken.A tunnel kiln kiln car shown schematically in Fig. 1 for the transport of combustible goods such as roof tiles through a tunnel kiln consists of a metallic chassis, not shown here, and a ceramic superstructure, which is used for thermal insulation of the metallic chassis when driving through the kiln through the tunnel kiln and for Recording of the fired goods is used. For this purpose, the ceramic superstructure is provided with bars 1, which serve as cross members, for example for receiving cassettes in which the fuel items are stored, such as roof tiles. The beams 1 of the kiln are at their end regions 2, 3 on ceramic longitudinal beams 4, which in turn are supported on ceramic supports 5. The support of the beams 1 at their end regions 2, 3 and the inclusion of the firing goods result in a bending stress on the beams.

In den Fig. 2 bis 4 ist eine erste Ausführungsform der Balken 1 detaillierter dargestellt. Er besteht aus einem langgestreckten Träger 6, der eine in Seitenansicht trapezförmige Gestalt aufweist. Die Oberseite 7 verläuft in einer horizontalen Ebene, während die Unterseite 8 die Trapezform ausbildet. Wie Fig. 3 veranschaulicht, verringert sich die Breite der Oberseite 7 gegenüber der Unterseite 8 von den Endbereichen 2, 3 bis zur Mitte der Trapezform, so daß die Seitenflächen 9 des Trägers 6 als windschiefe Ebenen verlaufen. Wie aus Fig. 4 hervorgeht, ist der Träger 6 insgesamt massiv ausgebildet, was sich günstig auf die Kräfteverteilung auswirkt sowie den Einsatz des Trockenpreßverfahrens, ermöglicht.2 to 4, a first embodiment of the bar 1 is shown in more detail. It consists of an elongated carrier 6, which has a trapezoidal shape in side view. The top 7 runs in a horizontal plane, while the bottom 8 forms the trapezoidal shape. As illustrated in FIG. 3, the width of the upper side 7 decreases compared to the lower side 8 from the end regions 2, 3 to the center of the trapezoidal shape, so that the side surfaces 9 of the carrier 6 run as skewed planes. As can be seen from FIG. 4, the carrier 6 is of solid construction overall, which has a favorable effect on the distribution of forces and enables the use of the dry pressing method.

Da die Oberseite 7 des Trägers 6 auf Druck und die Unterseite 8 auf Zug beansprucht wird, ergibt sich eine Zone im mittleren Bereich, wo sich die Druckspannung des oberen Gurtes und die Zugspannung des unteren Gurtes im wesentlichen kompensieren und vor allem Schubspannungen auftreten. Es ist daher vorgesehen, in diesem Bereich den Träger 6 mit Material-Ausnehmungen 10 zu versehen, wodurch eine erhebliche Materialeinsparung erreichbar ist, ohne die Biegefestigkeit des Balkens zu verringern. Insgesamt kann durch die Trapezform und die sich nach oben verjüngende Gestaltung des Trägers 6 sowie die zweckmäßig als durchgehende Löcher ausgebildeten Ausnehmungen 10 eine erhebliche Materialeinsparung (bis zu 40 %) gegenüber den bisher bekannten Voll- oder Hohlprofilbalken erreicht werden.Since the upper side 7 of the carrier 6 is subjected to pressure and the lower side 8 to tension, there is a zone in the middle area where the compressive stress of the upper belt and the tensile stress of the lower belt essentially compensate and, above all, shear stresses occur. It is therefore provided to provide the carrier 6 with material recesses 10 in this area, whereby considerable material savings can be achieved without reducing the flexural strength of the beam. Overall, the trapezoidal shape and the upwardly tapering design of the carrier 6 and the recesses 10, which are expediently designed as through holes, result in considerable material savings (up to 40%) compared to the previously known solid or hollow profile beams.

Desweiteren ist der Balken 1 an seinen Endbereichen 2, 3 mit quaderförmigen Ansätzen 11 versehen, die zur Auflage des Balkens 1 auf den Längsbalken 4 des Brennwagens dienen. Durch diese Ansätze 11 an den Endbereichen 2, 3 können auftretende Scherkräfte besser aufgenommen werden, so daß sich eine verringerte Materialbeanspruchung des Balkens 1 ergibt.Furthermore, the bar 1 is provided at its end regions 2, 3 with parallelepiped-shaped lugs 11, which serve to support the bar 1 on the longitudinal bar 4 of the kiln. Through these approaches 11 at the end regions 2, 3, shear forces that occur can be better absorbed, so that there is a reduced material stress on the beam 1.

In den Fig. 5 bis 8 ist eine zweite Ausführungsform des erfindungsgemäßen Balkens 1 dargestellt, die hinsichtlich der Erhöhung der Biegefestigkeit des Balkens sowie der Gewichtsreduzierung die gleichen Vorteile bietet wie die zuvor beschriebene Ausführungsform, die jedoch ein aufwendigeres Preßverfahren erfordert. Der Balken 1 umfaßt wiederum einen massiven keramischen Träger 14, der eine in Seitenansicht trapezförmige Gestalt aufweist. Wie aus den Fig. 7 und 8 hervorgeht, ist der Träger 14 im Querschnitt umgekehrt T-förmig ausgebildet, wobei die Unterseite 15 den Quersteg 16 der T-Form ausbildet, während die Oberseite 17 von der Endfläche des vertikalen T-Stegs 18 gebildet ist. Die Breite der Unterseite 15 vergrößert sich von den Endbereichen 20, 21 des Trägers 14 bis zur Mitte der Trapezform, während die Breite der Oberseite 17 über die gesamte Länge des Balkens 1 konstant ist. An den Endbereichen 20, 21 weist die Unterseite 15 einen horizontal geradlinigen Verlauf auf, so daß eine sichere Auflage des Balkens 1 auf den Längsbalken 4 gewährleistet ist. Desweiteren ist auch dieser Träger 14 im Bereich der neutralen Zone mit Material-Ausnehmungen 22 in Form von z.B. Löchern versehen, um weitere Materialeinsparungen zu erreichen.5 to 8 show a second embodiment of the beam 1 according to the invention, which offers the same advantages as the previously described embodiment in terms of increasing the bending strength of the beam and reducing weight, but which requires a more complex pressing process. The beam 1 in turn comprises a solid ceramic carrier 14, which has a trapezoidal shape in side view. As can be seen from FIGS. 7 and 8, the carrier 14 is reversely T-shaped in cross section, the underside 15 forming the transverse web 16 of the T-shape, while the upper side 17 is formed by the end face of the vertical T-web 18 . The width of the underside 15 increases from the end regions 20, 21 of the carrier 14 to the center of the trapezoidal shape, while the width of the top 17 is constant over the entire length of the beam 1. At the end regions 20, 21, the underside 15 has a horizontally rectilinear course, so that a secure support of the bar 1 on the longitudinal bar 4 is ensured. Furthermore, this support 14 is also in the area of the neutral zone with material recesses 22 in the form of e.g. Provide holes for further material savings.

Durch eine in bezug auf statische Belastungen optimierte Form des keramischen Balkens für einen Tunnel-Brennofen kann somit den durch Biegebeanspruchung auftretenden Materialermüdungen entgegengewirkt und darüber hinaus eine erhebliche Gewichtsreduzierung erreicht werden, die sich beim Aufheizprozeß des Brennwagens positiv auf die Energiebilanz auswirkt. Insbesondere die erste beschriebene Ausführungsform ist darüber hinaus fertigungstechnisch einfach und kostengünstig herstellbar.The shape of the ceramic beam for a tunnel kiln, which is optimized with regard to static loads, can therefore counteract the material fatigue caused by bending stress and, moreover, a considerable weight reduction can be achieved, which has a positive effect on the energy balance during the heating process of the kiln. In particular, the first described embodiment is also easy to manufacture and inexpensive to manufacture.

Claims (11)

Keramischer Balken für Tunnelofen-Brennwagen, die ein metallisches Chassis mit Rädern und einen keramischen Überbau zur thermischen Isolation des metallischen Chassis und zur Aufnahme von Brenngut umfassen, dadurch gekennzeichnet , daß der Balken als massiver keramischer Träger (6, 14) mit in Seitenansicht trapezförmiger Gestalt ausgebildet ist, derart, daß die auf Druck beanspruchte Oberseite (7, 17) in einer horizontalen Ebene verläuft, während die auf Zug beanspruchte Unterseite (8, 15) die Trapezform ausbildet.Ceramic beam for tunnel kiln kiln cars, which comprise a metallic chassis with wheels and a ceramic superstructure for thermal insulation of the metallic chassis and for receiving firing material, characterized in that the beam as a solid ceramic carrier (6, 14) with a trapezoidal shape in side view is designed such that the top (7, 17) which is subjected to pressure runs in a horizontal plane, while the bottom (8, 15) which is subject to tension forms the trapezoidal shape. Keramischer Balken nach Anspruch 1, dadurch gekennzeichnet , daß durch Schrägstellung von Seitenflächen (9) die Breite der Oberseite (7) gegenüber der Unterseite (8) zumindest bereichsweise verringert ist.Ceramic beam according to claim 1, characterized in that the inclination of side surfaces (9) reduces the width of the upper side (7) compared to the underside (8) at least in some areas. Keramischer Balken nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet , daß die Breite der Oberseite (7) gegenüber der Unterseite (8) von den beiden Endbereichen (2, 3) bis zum mittleren Bereich der Trapezform des Trägers (6) abnimmt (Fig. 3).Ceramic beam according to claim 1 or claim 2, characterized in that the width of the top (7) with respect to the bottom (8) decreases from the two end regions (2, 3) to the central region of the trapezoidal shape of the carrier (6) (Fig. 3). Keramischer Balken nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet , daß die Breite der Unterseite (8) über die gesamte Länge des Trägers (6) konstant ist.Ceramic beam according to one of claims 1 to 3, characterized in that the width of the underside (8) is constant over the entire length of the carrier (6). Keramischer Balken nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß der Balken an seinen Endbereichen (2, 3) jeweils mit einem quaderförmigen Auflageansatz (11) versehen ist.Ceramic bar according to one of claims 1 to 4, characterized in that the bar is provided at its end regions (2, 3) in each case with a cuboid-shaped support projection (11). Keramischer Balken nach Anspruch 1, dadurch gekennzeichnet , daß der Träger (14) im Querschnitt umgekehrt T-förmig ausgebildet ist, derart, daß die Unterseite (15) den Quersteg des T ausbildet.Ceramic beam according to claim 1, characterized in that the support (14) is reversely T-shaped in cross-section, such that the underside (15) forms the transverse web of the T. Keramischer Balken nach Anspruch 6, dadurch gekennzeichnet , daß die Breite der Unterseite (15) von den beiden Endbereichen (20, 21) bis zum mittleren Bereich der Trapezform des Trägers (14) zunimmt (Fig. 6).Ceramic beam according to claim 6, characterized in that the width of the underside (15) increases from the two end regions (20, 21) to the central region of the trapezoidal shape of the carrier (14) (Fig. 6). Keramischer Balken nach Anspruch 6 oder 7, dadurch gekennzeichnet , daß die Breite der Oberseite (17) über die gesamte Länge des Trägers (14) konstant ist.Ceramic beam according to claim 6 or 7, characterized in that the width of the top (17) is constant over the entire length of the carrier (14). Keramischer Balken nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet , daß an den Endbereichen (20, 21) des Balkens die Unterseite (15) jeweils in einer horizontalen Ebene verläuft und eine Auflagefläche ausbildet.Ceramic beam according to one of claims 6 to 8, characterized in that at the end regions (20, 21) of the beam, the underside (15) extends in each case in a horizontal plane and forms a contact surface. Keramischer Balken nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet , daß der Träger (6, 14) im mittleren Bereich, wo sich die Druckspannung des oberen Gurtes und die Zugspannung des unteren Gurtes im wesentlichen kompensieren und vor allem Schubspannungen auftreten, mit eingeformten Ausnehmungen (10, 22) versehen ist.Ceramic beam according to one or more of claims 1 to 9, characterized in that the carrier (6, 14) in the central region, where the compressive stress of the upper belt and the tensile stress of the lower Compensate belt essentially and especially shear stresses occur, is provided with molded recesses (10, 22). Keramischer Balken nach Anspruch 10, dadurch gekennzeichnet , daß die Ausnehmungen (10, 22) als durchgehende Löcher ausgebildet sind.Ceramic beam according to claim 10, characterized in that the recesses (10, 22) are designed as through holes.
EP96102874A 1995-05-11 1996-02-27 Ceramic beam for tunnel furnace wagon Expired - Lifetime EP0742417B1 (en)

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DE29507778U DE29507778U1 (en) 1995-05-11 1995-05-11 Ceramic beam for tunnel kiln kiln cars
DE29507778U 1995-05-11

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EP0742417A1 true EP0742417A1 (en) 1996-11-13
EP0742417B1 EP0742417B1 (en) 2001-11-14

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DE102015011742A1 (en) 2015-09-04 2017-03-09 Refratechnik Holding Gmbh Tunnel kiln car or carriage and method for its production and tunnel kiln with such a tunnel kiln car or carriage

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ATE540278T1 (en) * 2009-07-16 2012-01-15 Saint Gobain Industriekeramik Roedental Gmbh TRANSPORTABLE FIREPLATE SHELF

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US4300881A (en) * 1980-02-01 1981-11-17 Salviata Impianti S.P.A. Truck or the like for conveying ceramic articles through a kiln

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Publication number Priority date Publication date Assignee Title
DE102015011742A1 (en) 2015-09-04 2017-03-09 Refratechnik Holding Gmbh Tunnel kiln car or carriage and method for its production and tunnel kiln with such a tunnel kiln car or carriage

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ES2167475T3 (en) 2002-05-16
EP0742417B1 (en) 2001-11-14
DE29507778U1 (en) 1996-09-19
DE59608170D1 (en) 2001-12-20

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