EP0862034A1 - Keystone set - Google Patents

Keystone set Download PDF

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Publication number
EP0862034A1
EP0862034A1 EP98102054A EP98102054A EP0862034A1 EP 0862034 A1 EP0862034 A1 EP 0862034A1 EP 98102054 A EP98102054 A EP 98102054A EP 98102054 A EP98102054 A EP 98102054A EP 0862034 A1 EP0862034 A1 EP 0862034A1
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Prior art keywords
keystone
stones
adapter
vault
bricks
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EP98102054A
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German (de)
French (fr)
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EP0862034B1 (en
Inventor
Hans J. Dr. Schmidt
Klaus Röpke
Harald Schwab
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Schwab Feuerfesttechnik GmbH
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Schwab Feuerfesttechnik GmbH
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Application filed by Schwab Feuerfesttechnik GmbH filed Critical Schwab Feuerfesttechnik GmbH
Priority to DK98102054T priority Critical patent/DK0862034T3/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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/02—Crowns; Roofs
    • F27D1/025—Roofs supported around their periphery, e.g. arched roofs
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used

Definitions

  • the invention relates to a keystone set for a vault made of refractory stones, consisting of two form-fitting adapter stones that can be connected to the refractory stones and a wedge-shaped keystone that is to be closed in the Space between the adapter blocks can be inserted axially, the adapter stones and the keystone in one Joint bed made of mortar are used and made Magnesia stones exist.
  • - Fireproof stone vault can be found in industrial ovens, e.g. B. in the field of Distribution bridge above a burner of a lime shaft furnace.
  • CH-PS 453 586 is a furnace lining for rotary kilns known from wedge-shaped stones and between the Stones arranged metal sheets is built.
  • the Metal sheets have a sheet thickness between 0.8 and 1 mm and have beads produced by deep drawing, which engage in grooves in the adjacent refractory bricks.
  • the Metal sheets serve as joint binders.
  • the refractory bricks are not laid in the mortar bed, but only with the interposition of the metal sheets with each other connected.
  • the invention has for its object a keystone set specify the keystone in the full joint bed can be set and which the vault pressure at takes up even pressure distribution.
  • the invention teaches that the im installed condition mutually supported connection surfaces the adapter stones and the keystone as flat, stepless surfaces are formed and assigned to each other Have grooves that appear after inserting the Complete the keystone into an open channel on the front, and that the channels each have a front insertable solid coupling rod made of a non-alloy carbon steel record, tape.
  • MA spinel stones are suitable, Magnesia chronite stones, magnesia zircon stones and the like.
  • the mutually assigned grooves complement each other to form bores and have the appropriate inserted in the holes Coupling rods with a circular cross section Diameter from 10 to 15 mm.
  • the invention teaches that the Keystone is divided and made of two keystone halves which, when installed, on level, stepless contact surfaces are supported against each other.
  • the contact surfaces also have mutually associated Grooves on, which become an open end channel supplement that receives a coupling rod.
  • the Arch pressure evenly on the keystone or Keystone halves transferable.
  • the setting of the keystone or the keystone halves are fully full Joint bed, whereby an even application of mortar ensures is and annoying partial densifications of Mortar accumulations do not occur. Assembly errors are thereby excluded.
  • the coupling rods secure the Keystone or the keystone halves against Moving under the effect of the arch pressure. Under the Operating temperature of the furnace, during heating and Burning process, it comes through reaction of the components the metallic coupling rod and the magnesia stones a fixed connection in the form of a ferritic Connection zone between the coupling rod and the adjacent magnesia material.
  • connection zone is created through diffusion processes and acts on a comparison to the cross section of the coupling rods much larger Area of magnesia stones.
  • the connecting zone causes a firm connection and secure locking of the Keystone set of stones. A slip in itself changing vault pressure is excluded and a uniform introduction of the vault pressure guaranteed.
  • the adapter stones can be on the keystone facing outside a substantially radial have trained projection, the manner of a Tongue / groove connection in a positive manner in a groove on the Outside of an adjacent stone of the vault intervenes. It is understood that on the outside of the Adapter stones can also be provided with a groove a protrusion formed on the neighboring stone interacts positively.
  • the vault is made of wedge-shaped refractory stones 1 built up over substantially radial Interlock groove / tongue elements 2 in a form-fitting manner.
  • the Keystone set consists of two form-fitting to this Stones 1 connectable adapter stones 3 and one, in Embodiment split, wedge-shaped Keystone 4, which is in the space to be closed between the Adapter blocks 3 can be used axially.
  • adapter stones 3 and magnesia stones are used as keystone 4.
  • step-free surfaces are formed and mutually assigned grooves 6 have after the insertion of the keystone add a channel 7 open at the front.
  • metallic coupling rods 8 can be inserted at the front.
  • the divided keystone 4 consists of two identical keystone halves 4 ', 4' 'built in Condition also on flat, stepless contact surfaces are supported against each other.
  • the contact surfaces point also correlated grooves on each other complete a channel 7 that is open at the end, the one metallic coupling rod that can be inserted at the front 8 records.
  • they complement one another assigned grooves 6 to a bore that extends axially extends the entire width of the stones.
  • the bore points preferably a diameter of 12 mm.
  • the Coupling rods 8 are solidly designed as round bolts and are made of an unalloyed carbon steel.
  • the Adapter blocks in the manner of a tongue and groove connection 2 to the adjacent stones 1 of the vault connected.
  • the adapter stones 3 On the outside of the keystone 4 have the adapter stones 3 on their outside substantially radially oriented projection 9, the into a groove 10 on the outside of the adjacent stone 1 of the vault engages. It is understood that the Tongue / groove connection 2 can also be designed differently.
  • the keystone halves 4 ', 4' ' are fully integrated into one full joint bed made of mortar. Then be the coupling rods 8 into the channels 7 that are open at the end introduced. During the heating and burning process of the Components of the furnace react metallic coupling rods 8 and 3 magnesia stones, 4 ', 4' '. There is a firm connection between the Coupling rods 8 and the adjacent magnesia stones 3, 4 ', 4' ', which form a ferritic transition zone can be traced back. Through the coupling rods 8 are the keystone halves 4 ', 4' 'against slipping secured and able to different sizes To record vault pressures. The vault pressure is over the flat, stepless pads 5 with a uniform Pressure distribution in the keystone 4 or its keystone halves 4 ', 4' 'initiated.

Abstract

The keystone set, for a refractory brick vault, consists of a mortared assembly of a keystone (4) between two adapter bricks (3) which interlock with adjoining refractory bricks (1). The keystone and the adapter bricks are magnesia bricks. In the assembled state, the joint faces (5) are flat faces with matching grooves (6) forming open-ended channels (7) for insertion of solid coupling rods (8) of plain carbon steel.

Description

Die Erfindung betrifft ein Schlußsteinset für ein Gewölbe aus feuerfesten Steinen, bestehend aus zwei formschlüssig an die feuerfesten Steine anschließbaren Adaptersteinen und einem keilförmigen Schlußstein, der in den zu schließenden Raum zwischen den Adaptersteinen axial einsetzbar ist, wobei die Adaptersteine und der Schlußstein in ein Fugenbett aus Mörtel eingesetzt sind und aus Magnesiasteinen bestehen. - Gewölbe aus feuerfesten Steinen findet man in Industrieöfen, z. B. im Bereich der Verteilerbrücke oberhalb eines Brenners eines Kalkschachtofens.The invention relates to a keystone set for a vault made of refractory stones, consisting of two form-fitting adapter stones that can be connected to the refractory stones and a wedge-shaped keystone that is to be closed in the Space between the adapter blocks can be inserted axially, the adapter stones and the keystone in one Joint bed made of mortar are used and made Magnesia stones exist. - Fireproof stone vault can be found in industrial ovens, e.g. B. in the field of Distribution bridge above a burner of a lime shaft furnace.

Bei einem aus DE-C 39 33 744 bekannten Schlußsteinset, von dem die Erfindung ausgeht, sind die im eingebauten Zustand gegeneinander abgestützten Anschlußflächen der Adaptersteine und des Schlußsteins stufenförmig mit axial verlaufenden Tragkanten ausgebildet. Der axial einsetzbare Schlußstein, der in axialer Richtung auch geteilt ausgebildet sein kann, liegt mit seitlichen Schultern auf einem Absatz der Adaptersteine auf. Maßtoleranzen in den aufeinander abgestimmten Steinen des Schlußsteinsets sowie unterschiedliche Krafteinwirkungen auf die Auflageflächen des Gewölbes bewirken eine ungleichmäßige Kräftezusammenführung im Gewölbescheitel, wobei Kerbwirkungen und große Kantendrücke an den Tragkanten der Anschlußflächen Bruchstellen und Risse im Mauerwerk verursachen können. Nachteilig ist ferner, daß beim Einsetzen des Schlußsteins ein gleichmäßiger Mörtelauftrag auf allen Flächen nicht gewährleistet ist. Beim Einschieben des Schlußsteins kommt es regelmäßig zu Mörtelansammlungen auf den Absätzen der Adaptersteine, wobei die Mörtelansammlungen punktuell verdichtet werden. Es können Montagefehler resultieren, die ebenfalls dazu beitragen, daß der Gewölbedruck nicht gleichmäßig auf den Schlußstein übertragen wird.In a keystone set known from DE-C 39 33 744, from which the invention is based on, are in the installed state mutually supported connecting surfaces of the adapter blocks and the keystone step-like with axially extending Base edges formed. The axially usable Keystone, which is also split in the axial direction can be on the shoulders a paragraph of the adapter stones. Dimensional tolerances in the coordinated stones of the keystone set as well different forces acting on the contact surfaces of the vault cause an uneven combination of forces in the crown of the vault, with notch effects and large Edge pressures at the supporting edges of the connection surfaces break points and can cause cracks in the masonry. Disadvantageous is also that when inserting the keystone not even mortar application on all surfaces is guaranteed. When inserting the keystone comes it regularly builds up mortar on the heels of the Adapter blocks, whereby the mortar accumulations are compacted at certain points will. There may be assembly errors that also contribute to the fact that the arch pressure is not is evenly transferred to the keystone.

Aus CH-PS 453 586 ist eine Ofenausmauerung für Drehrohröfen bekannt, die aus keilförmigen Steinen und zwischen den Steinen angeordneten Metallblechen aufgebaut ist. Die Metallbleche besitzen eine Blechstärke zwischen 0,8 und 1 mm und weisen durch Tiefziehen hergestellte Sicken auf, die in Rillen der angrenzenden Feuerfeststeine eingreifen. Die Metallbleche dienen als Fugebindemittel. Die Feuerfeststeine sind nicht im Mörtelbett verlegt, sondern lediglich unter Zwischenschaltung der Bleche formflüssig miteinander verbunden.CH-PS 453 586 is a furnace lining for rotary kilns known from wedge-shaped stones and between the Stones arranged metal sheets is built. The Metal sheets have a sheet thickness between 0.8 and 1 mm and have beads produced by deep drawing, which engage in grooves in the adjacent refractory bricks. The Metal sheets serve as joint binders. The refractory bricks are not laid in the mortar bed, but only with the interposition of the metal sheets with each other connected.

Der Erfindung liegt die Aufgabe zugrunde, ein Schlußsteinset anzugeben, dessen Schlußstein im vollen Fugenbett gesetzt werden kann und welches den Gewölbedruck bei gleichmäßiger Druckverteilung aufnimmt.The invention has for its object a keystone set specify the keystone in the full joint bed can be set and which the vault pressure at takes up even pressure distribution.

Zur Lösung dieser Aufgabe lehrt die Erfindung, daß die im eingebauten Zustand gegeneinander abgestützten Anschlußflächen der Adaptersteine und des Schlußsteins als ebene, stufenfreie Flächen ausgebildet sind und einander zugeordnete Rillen aufweisen, die sich nach dem Einsetzen des Schlußsteins zu einem stirnseitig offenen Kanal ergänzen, und daß die Kanäle jeweils eine stirnseitig einführbare massive Kupplungsstange aus einem nichtlegierten Kohlenstoffstahl aufnehmen. Im Rahmen der Erfindung werden als Adaptersteine und als Schlußstein Magnesiasteine eingesetzt, also feuerfeste Steine mit einem hohen Anteil an Magnesiumoxid, vorzugsweise einem MgO-Gewichtsanteil von mehr als 80 Gew.-%. Geeignet sind MA-Spinellsteine, Magnesiachronitsteine, Magnesiazirkonsteine und dergleichen. Gemäß einer bevorzugten Ausführung der Erfindung ergänzen sich die einander zugeordneten Rillen zu Bohrungen und weisen die passend in die Bohrungen eingesetzten Kupplungsstangen einen kreisförmigen Querschnitt mit einem Durchmesser von 10 bis 15 mm auf.To solve this problem, the invention teaches that the im installed condition mutually supported connection surfaces the adapter stones and the keystone as flat, stepless surfaces are formed and assigned to each other Have grooves that appear after inserting the Complete the keystone into an open channel on the front, and that the channels each have a front insertable solid coupling rod made of a non-alloy carbon steel record, tape. Within the scope of the invention, Adapter stones and used as keystone magnesia stones, ie refractory stones with a high proportion of Magnesium oxide, preferably an MgO weight fraction of more than 80% by weight. MA spinel stones are suitable, Magnesia chronite stones, magnesia zircon stones and the like. According to a preferred embodiment of the invention the mutually assigned grooves complement each other to form bores and have the appropriate inserted in the holes Coupling rods with a circular cross section Diameter from 10 to 15 mm.

In weiterer Ausgestaltung lehrt die Erfindung, daß der Schlußstein geteilt ausgebildet ist und aus zwei Schlußsteinhälften besteht, die im eingebauten Zustand an ebenen, stufenfreien Anlageflächen gegeneinander abgestützt sind. Die Anlageflächen weisen ebenfalls einander zugeordnete Rillen auf, die sich zu einem stirnseitig offenen Kanal ergänzen, der eine Kupplungsstange aufnimmt.In a further embodiment, the invention teaches that the Keystone is divided and made of two keystone halves which, when installed, on level, stepless contact surfaces are supported against each other. The contact surfaces also have mutually associated Grooves on, which become an open end channel supplement that receives a coupling rod.

Durch die ebenen, stufenfreien Anschlußflächen ist der Gewölbedruck gleichmäßig auf den Schlußstein bzw. die Schlußsteinhälften übertragbar. Das Setzen des Schlußsteins bzw. der Schlußsteinhälften erfolgt vollfugig im vollen Fugenbett, wobei ein gleichmäßiger Mörtelauftrag gewährleistet ist und störende partielle Verdichtungen von Mörtelansammlungen nicht auftreten. Montagefehler sind dadurch ausgeschlossen. Die Kupplungsstangen sichern den Schlußstein bzw. die Schlußsteinhälften gegen ein Verschieben unter der Wirkung des Gewölbedruckes. Unter der Betriebstemperatur des Ofens, während des Aufheiz- und Brennprozesses, kommt es durch Reaktion der Bestandteile der metallischen Kupplungsstange und der Magnesiasteine zu einer festen Verbindung in Form einer ferritischen Verbindungszone zwischen der Kupplungsstange und dem angrenzenden Magnesiamaterial. Die Verbindungszone entsteht durch Diffusionsvorgänge und wirkt auf eine im Vergleich zum Querschnitt der Kupplungsstangen wesentlich größeren Bereich der Magnesiasteine. Die Verbindungszone bewirkt eine feste Verbindung und sichere Verriegelung der das Schlußsteinset bildenden Steine. Ein Verrutschen bei sich änderndem Gewölbedruck ist ausgeschlossen und eine gleichmäßige Einleitung des Gewölbedruckes gewährleistet.Due to the flat, stepless connecting surfaces, the Arch pressure evenly on the keystone or Keystone halves transferable. The setting of the keystone or the keystone halves are fully full Joint bed, whereby an even application of mortar ensures is and annoying partial densifications of Mortar accumulations do not occur. Assembly errors are thereby excluded. The coupling rods secure the Keystone or the keystone halves against Moving under the effect of the arch pressure. Under the Operating temperature of the furnace, during heating and Burning process, it comes through reaction of the components the metallic coupling rod and the magnesia stones a fixed connection in the form of a ferritic Connection zone between the coupling rod and the adjacent magnesia material. The connection zone is created through diffusion processes and acts on a comparison to the cross section of the coupling rods much larger Area of magnesia stones. The connecting zone causes a firm connection and secure locking of the Keystone set of stones. A slip in itself changing vault pressure is excluded and a uniform introduction of the vault pressure guaranteed.

Die Adaptersteine können an ihrer dem Schlußstein abgewandten Außenseite einen im wesentlichen radial ausgebildeten Vorsprung aufweisen, der nach Art einer Nut/Federverbindung formschlüssig in eine Nut an der Außenseite eines angrenzenden Steins des Gewölbes eingreift. Es versteht sich, daß an der Außenseite der Adaptersteine auch eine Nut vorgesehen sein kann, die mit einem an den benachbarten Stein angeformten Vorsprung formschlüssig zusammenwirkt.The adapter stones can be on the keystone facing outside a substantially radial have trained projection, the manner of a Tongue / groove connection in a positive manner in a groove on the Outside of an adjacent stone of the vault intervenes. It is understood that on the outside of the Adapter stones can also be provided with a groove a protrusion formed on the neighboring stone interacts positively.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlich erläutert. Die einzige Figur zeigt in Form einer Explosionsdarstellung ein Schlußsteinset für ein ausschnittsweise dargestelltes Gewölbe aus feuerfesten Steinen in einem Industrieofen, z. B. einem Kalkschachtofen.In the following, the invention is based on only one Exemplary embodiment drawing in detail explained. The only figure shows in the form of a Exploded view of a keystone set for a detail depicted vault made of refractory stones in an industrial furnace, e.g. B. a lime shaft furnace.

Das Gewölbe ist aus keilförmigen feuerfesten Steinen 1 aufgebaut, die über im wesentlichen radial verlaufenden Nut/Federelemente 2 formschlüssig ineinandergreifen. Das Schlußsteinset besteht aus zwei formschlüssig an diese Steine 1 anschließbaren Adaptersteinen 3 und einem, im Ausführungsbeispiel geteilt ausgebildeten, keilförmigen Schlußstein 4, der in den zu schließenden Raum zwischen den Adaptersteinen 3 axial einsetzbar ist. Als Adaptersteine 3 und als Schlußstein 4 werden Magnesiasteine verwendet. Der Figur entnimmt man, daß die im eingebauten Zustand gegeneinander abgestützten Anschlußflächen 5 der Adaptersteine 3 und des Schlußsteins 4 als ebene, stufenfreie Flächen ausgebildet sind und einander zugeordnete Rillen 6 aufweisen, die sich nach dem Einsetzen des Schlußsteins zu einem stirnseitig offenen Kanal 7 ergänzen. In die Kanäle 7 sind metallische Kupplungsstangen 8 stirnseitig einführbar. Der geteilt ausgebildete Schlußstein 4 besteht aus zwei identischen Schlußsteinhälften 4', 4'', die im eingebauten Zustand ebenfalls an ebenen, stufenfreien Anlageflächen gegeneinander abgestützt sind. Die Anlageflächen weisen ebenfalls einander zugeordnete Rillen auf, die sich zu einem stirnseitig offenen Kanal 7 ergänzen, der eine metallische, stirnseitig einführbare Kupplungsstange 8 aufnimmt. Im Ausführungsbeispiel ergänzen sich die einander zugeordneten Rillen 6 zu einer Bohrung, die sich axial über die gesamte Breite der Steine erstreckt. Die Bohrung weist vorzugsweise einen Durchmesser von 12 mm auf. Die Kupplungsstangen 8 sind massiv als Rundbolzen ausgebildet und bestehen aus einem unlegierten Kohlenstoffstahl.The vault is made of wedge-shaped refractory stones 1 built up over substantially radial Interlock groove / tongue elements 2 in a form-fitting manner. The Keystone set consists of two form-fitting to this Stones 1 connectable adapter stones 3 and one, in Embodiment split, wedge-shaped Keystone 4, which is in the space to be closed between the Adapter blocks 3 can be used axially. As adapter stones 3 and magnesia stones are used as keystone 4. Of the Figure can be seen that in the installed state against each other supported connecting surfaces 5 of the adapter blocks 3 and the keystone 4 as flat, step-free surfaces are formed and mutually assigned grooves 6 have after the insertion of the keystone add a channel 7 open at the front. In channels 7 metallic coupling rods 8 can be inserted at the front. The divided keystone 4 consists of two identical keystone halves 4 ', 4' 'built in Condition also on flat, stepless contact surfaces are supported against each other. The contact surfaces point also correlated grooves on each other complete a channel 7 that is open at the end, the one metallic coupling rod that can be inserted at the front 8 records. In the exemplary embodiment, they complement one another assigned grooves 6 to a bore that extends axially extends the entire width of the stones. The bore points preferably a diameter of 12 mm. The Coupling rods 8 are solidly designed as round bolts and are made of an unalloyed carbon steel.

An ihrer dem Schlußstein 4 abgewandten Außenseite sind die Adaptersteine nach Art einer Nut/Federverbindung 2 an die angrenzenden Steine 1 des Gewölbes angeschlossen. Zu diesem Zweck weisen die Adaptersteine 3 an ihrer Außenseite einen im wesentlichen radial ausgerichteten Vorsprung 9 auf, der in eine Nut 10 an der Außenseite des angrenzenden Steins 1 des Gewölbes eingreift. Es versteht sich, daß die Nut/Federverbindung 2 auch anders gestaltet sein kann.On the outside of the keystone 4 are the Adapter blocks in the manner of a tongue and groove connection 2 to the adjacent stones 1 of the vault connected. To this Purpose have the adapter stones 3 on their outside substantially radially oriented projection 9, the into a groove 10 on the outside of the adjacent stone 1 of the vault engages. It is understood that the Tongue / groove connection 2 can also be designed differently.

Die Schlußsteinhälften 4', 4'' werden vollfugig in ein volles Fugenbett aus Mörtel gesetzt. Anschließend werden die Kupplungsstangen 8 in die stirnseitig offenen Kanäle 7 eingeführt. Während des Aufheiz- und Brennvorganges des Ofens kommt es zu einer Reaktion von Bestandteilen der metallischen Kupplungsstangen 8 und der Magnesiasteine 3, 4', 4''. Es entsteht eine feste Verbindung zwischen den Kupplungsstangen 8 und den angrenzenden Magnesiasteinen 3, 4', 4'', die auf eine sich bildende ferritische Übergangszone zurückgeführt werden kann. Durch die Kupplungsstangen 8 sind die Schlußsteinhälften 4', 4'' gegen Verrutschen gesichert und in der Lage, unterschiedlich große Gewölbedrücke aufzunehmen. Der Gewölbedruck wird über die ebenen, stufenfreien Anschlußflächen 5 mit gleichmäßiger Druckverteilung in den Schlußstein 4 bzw. dessen Schlußsteinhälften 4', 4'' eingeleitet.The keystone halves 4 ', 4' 'are fully integrated into one full joint bed made of mortar. Then be the coupling rods 8 into the channels 7 that are open at the end introduced. During the heating and burning process of the Components of the furnace react metallic coupling rods 8 and 3 magnesia stones, 4 ', 4' '. There is a firm connection between the Coupling rods 8 and the adjacent magnesia stones 3, 4 ', 4' ', which form a ferritic transition zone can be traced back. Through the coupling rods 8 are the keystone halves 4 ', 4' 'against slipping secured and able to different sizes To record vault pressures. The vault pressure is over the flat, stepless pads 5 with a uniform Pressure distribution in the keystone 4 or its keystone halves 4 ', 4' 'initiated.

Claims (5)

Schlußsteinset für ein Gewölbe aus feuerfesten Steinen, bestehend aus zwei formschlüssig an die feuerfesten Steine anschließbaren Adaptersteinen und einem keilförmigen Schlußstein, der in den zu schließenden Raum zwischen den Adaptersteinen axial einschiebbar ist, wobei die Adaptersteine und der Schlußstein in ein Fugenbett aus Mörtel eingesetzt sind und aus Magnesiasteinen bestehen, dadurch gekennzeichnet, daß die im eingebauten Zustand gegeneinander abgestützten Anschlußflächen (5) der Adaptersteine (3) und des Schlußsteins (4) als ebene, stufenfreie Flächen ausgebildet sind und einander zugeordnete Rillen (6) aufweisen, die sich nach dem Einsetzen des Schlußsteins (4) zu einem stirnseitig offenen Kanal (7) ergänzen, und daß die Kanäle (7) jeweils eine stirnseitig einführbare massive Kupplungsstange (8) aus einem nichtlegierten Kohlenstoffstahl aufnehmen. Keystone set for a vault made of refractory bricks, consisting of two adapter stones that can be positively connected to the refractory bricks and a wedge-shaped keystone that can be inserted axially into the space to be closed between the adapter bricks, the adapter stones and the keystone being inserted into a joint bed made of mortar and consist of magnesia stones , characterized in that that the mutually supported connecting surfaces (5) of the adapter stones (3) and the keystone (4) are designed as flat, stepless surfaces and have mutually associated grooves (6) which become one after the insertion of the keystone (4) complete channel (7) open at the front, and that the channels (7) each receive a front insertable massive coupling rod (8) made of a non-alloy carbon steel. Schlußsteinset nach Anspruch 1, dadurch gekennzeichnet, daß die einander zugeordneten Rillen (6) sich zu Bohrungen ergänzen und die passend in die Bohrungen eingesetzten Kupplungsstangen (8) einen kreisförmigen Querschnitt mit einem Durchmesser von 10 bis 15 mm aufweisen. Keystone set according to claim 1, characterized in that the mutually assigned grooves (6) to bores complete and insert them into the holes Coupling rods (8) with a circular cross section have a diameter of 10 to 15 mm. Schlußsteinset nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Magnesiasteine einen MgO-Gewichtsanteil von mehr als 80 Gew.-% aufweisen.Keystone set according to claim 1 or 2, characterized in that the magnesia stones have a MgO weight fraction of more than 80% by weight. Schlußsteinset nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Schlußstein (4) geteilt ausgebildet ist und aus Schlußsteinhälften (4', 4'') besteht, die im eingebauten Zustand an ebenen, stufenfreien Anlageflächen gegeneinander abgestützt sind, daß die Anlageflächen einander zugeordnete Rillen aufweisen, die sich zu einem stirnseitig offenen Kanal (7) ergänzen, und daß der Kanal (7) eine stirnseitig einführbare Kupplungsstange (8) aus einem nichtlegierten Kohlenstoffstahl aufnimmt.Keystone set according to one of claims 1 to 3, characterized characterized in that the keystone (4) is divided and consists of keystone halves (4 ', 4' '), which in the installed condition on level, stepless contact surfaces are supported against each other that the contact surfaces have mutually assigned grooves which form a Completely open channel (7) at the front, and that the channel (7) a coupling rod (8) which can be inserted at the end an unalloyed carbon steel. Schlußsteinset nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Adaptersteine (3) an ihrer dem Schlußstein (4) abgewandten Außenseite einen im wesentlichen radial ausgerichteten Vorsprung (9) aufweisen, der nach Art einer Nut/Federverbindung formschlüssig in eine Nut (10) an der Außenseite eines angrenzenden Steins (1) des Gewölbes eingreift.Keystone set according to one of claims 1 to 4, characterized characterized in that the adapter stones (3) at their the Keystone (4) facing away from the outside essentially have radially aligned projection (9) in the manner of a tongue and groove connection in a form-fitting manner Groove (10) on the outside of an adjacent stone (1) of the vault engages.
EP98102054A 1997-03-01 1998-02-06 Keystone set Revoked EP0862034B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK98102054T DK0862034T3 (en) 1997-03-01 1998-02-06 Paving stone set

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19708419 1997-03-01
DE19708419 1997-03-01

Publications (2)

Publication Number Publication Date
EP0862034A1 true EP0862034A1 (en) 1998-09-02
EP0862034B1 EP0862034B1 (en) 1999-04-21

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EP98102054A Revoked EP0862034B1 (en) 1997-03-01 1998-02-06 Keystone set

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EP (1) EP0862034B1 (en)
AT (1) ATE179249T1 (en)
DE (1) DE59800003D1 (en)
DK (1) DK0862034T3 (en)
ES (1) ES2131429T3 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1255088A1 (en) * 2001-05-04 2002-11-06 Refratechnik Holding GmbH Bearing arch arrangement and construction process of a bearing arch
CZ298145B6 (en) * 2006-04-21 2007-07-04 Herbst@Jirí Furnace unit
CN102052833A (en) * 2011-01-31 2011-05-11 江阴长源机械制造有限公司 Kiln body arched beam in high-temperature area of pushed slab kiln with nitrogen protection
CN102759274A (en) * 2012-07-23 2012-10-31 万锦标 Kiln crown component of kiln
CN105546986A (en) * 2016-01-27 2016-05-04 江苏南方节能科技有限公司 Special-shaped furnace roof of conventional three-segment furnace
CN105783517A (en) * 2016-04-26 2016-07-20 苏州汇科机电设备有限公司 Hearth structure of battery material sintering furnace
CN105783502A (en) * 2016-04-26 2016-07-20 苏州汇科机电设备有限公司 Efficient battery material sintering furnace with push plate guide sliding function
CN106152790A (en) * 2016-07-08 2016-11-23 杨福堂 Stove top dome is without mould building method
CN106989594A (en) * 2017-05-17 2017-07-28 东台市宏大耐热材料有限公司 Buckled tunnel cave kiln body
KR20170107564A (en) * 2015-02-03 2017-09-25 포스벨 인크 Integral self-supporting composite refractory components and methods of making the same
US20190184277A1 (en) * 2017-12-14 2019-06-20 Joseph Allen Dinwiddie Three-dimensional arch puzzle

Citations (6)

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FR1285556A (en) * 1961-03-14 1962-02-23 Didier Werke Ag Blocks for the construction of a masonry consisting of basic refractory bricks
DE1222262B (en) * 1962-03-02 1966-08-04 Gen Refractories Co Refractory stones and vaults made from such stones
CH453586A (en) * 1965-09-24 1968-06-14 Veitscher Magnesitwerke Ag Rotary kiln lining made of wedge stones anchored against each other
DE1583466A1 (en) * 1967-08-24 1970-08-13 Kaiser Aluminium Chem Corp Lining for rotary furnaces
DE2119051A1 (en) * 1971-04-20 1972-10-26 Brohltal AG für Stein- und Tonindustrie, 5401 Urmitz Wedge shaped refractory bricks - with staggered or mirror image shoulders for securely interlocking linings to large dia appts
DE3933744A1 (en) * 1989-10-10 1991-04-18 Radex Heraklith KEYSTONE SET

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1285556A (en) * 1961-03-14 1962-02-23 Didier Werke Ag Blocks for the construction of a masonry consisting of basic refractory bricks
DE1222262B (en) * 1962-03-02 1966-08-04 Gen Refractories Co Refractory stones and vaults made from such stones
CH453586A (en) * 1965-09-24 1968-06-14 Veitscher Magnesitwerke Ag Rotary kiln lining made of wedge stones anchored against each other
DE1583466A1 (en) * 1967-08-24 1970-08-13 Kaiser Aluminium Chem Corp Lining for rotary furnaces
DE2119051A1 (en) * 1971-04-20 1972-10-26 Brohltal AG für Stein- und Tonindustrie, 5401 Urmitz Wedge shaped refractory bricks - with staggered or mirror image shoulders for securely interlocking linings to large dia appts
DE3933744A1 (en) * 1989-10-10 1991-04-18 Radex Heraklith KEYSTONE SET
DE3933744C2 (en) * 1989-10-10 1991-07-18 Radex-Heraklith Industriebeteiligungs Ag, Wien, At

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1255088A1 (en) * 2001-05-04 2002-11-06 Refratechnik Holding GmbH Bearing arch arrangement and construction process of a bearing arch
CZ298145B6 (en) * 2006-04-21 2007-07-04 Herbst@Jirí Furnace unit
CN102052833A (en) * 2011-01-31 2011-05-11 江阴长源机械制造有限公司 Kiln body arched beam in high-temperature area of pushed slab kiln with nitrogen protection
CN102759274A (en) * 2012-07-23 2012-10-31 万锦标 Kiln crown component of kiln
CN102759274B (en) * 2012-07-23 2015-01-28 万锦标 Kiln crown component of kiln
KR20170107564A (en) * 2015-02-03 2017-09-25 포스벨 인크 Integral self-supporting composite refractory components and methods of making the same
CN105546986A (en) * 2016-01-27 2016-05-04 江苏南方节能科技有限公司 Special-shaped furnace roof of conventional three-segment furnace
CN105783517A (en) * 2016-04-26 2016-07-20 苏州汇科机电设备有限公司 Hearth structure of battery material sintering furnace
CN105783502A (en) * 2016-04-26 2016-07-20 苏州汇科机电设备有限公司 Efficient battery material sintering furnace with push plate guide sliding function
CN106152790A (en) * 2016-07-08 2016-11-23 杨福堂 Stove top dome is without mould building method
CN106989594A (en) * 2017-05-17 2017-07-28 东台市宏大耐热材料有限公司 Buckled tunnel cave kiln body
CN106989594B (en) * 2017-05-17 2022-11-01 东台市宏大耐热材料有限公司 Fastening type tunnel kiln body
US20190184277A1 (en) * 2017-12-14 2019-06-20 Joseph Allen Dinwiddie Three-dimensional arch puzzle
US10716993B2 (en) * 2017-12-14 2020-07-21 Joseph Allen Dinwiddie Three-dimensional arch puzzle

Also Published As

Publication number Publication date
EP0862034B1 (en) 1999-04-21
DK0862034T3 (en) 1999-05-31
ATE179249T1 (en) 1999-05-15
ES2131429T3 (en) 1999-07-16
DE59800003D1 (en) 1999-05-27

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