EP0089398B1 - Gewölbeträger für einen Wärmebehandlungsofen - Google Patents

Gewölbeträger für einen Wärmebehandlungsofen Download PDF

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Publication number
EP0089398B1
EP0089398B1 EP82102456A EP82102456A EP0089398B1 EP 0089398 B1 EP0089398 B1 EP 0089398B1 EP 82102456 A EP82102456 A EP 82102456A EP 82102456 A EP82102456 A EP 82102456A EP 0089398 B1 EP0089398 B1 EP 0089398B1
Authority
EP
European Patent Office
Prior art keywords
ceiling
heating furnace
beams
construction
duct
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.)
Expired
Application number
EP82102456A
Other languages
English (en)
French (fr)
Other versions
EP0089398A1 (de
Inventor
Tetsuya Tokitsu
Saburo Harada
Jiro Yamasaki
Akihiro Nakama
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.)
Chugai Ro Co Ltd
Nippon Steel Corp
Original Assignee
Chugai Ro Co Ltd
Nippon Steel Corp
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 Chugai Ro Co Ltd, Nippon Steel Corp filed Critical Chugai Ro Co Ltd
Priority to DE8282102456T priority Critical patent/DE3274576D1/de
Priority to EP82102456A priority patent/EP0089398B1/de
Priority to AT82102456T priority patent/ATE24044T1/de
Publication of EP0089398A1 publication Critical patent/EP0089398A1/de
Application granted granted Critical
Publication of EP0089398B1 publication Critical patent/EP0089398B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/06—Crowns or roofs for combustion chambers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings
    • 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

Definitions

  • the present invention relates to a ceiling construction for a heating furnace which comprises a ceiling portion of the heating furnace, and a plurality of ceiling beams for supporting said ceiling portion, at least one of said beams having a closed cross section for utilisation of its interior as a gas duct.
  • a construction is known from GB-A-3 542 14.
  • the invention also relates to a furnace having such a ceiling construction.
  • the invention is applicable to a heating furnace for heat treating workpieces such as steel slabs, etc.
  • refractory materials for a ceiling of the furnace are generally suspended from ceiling beams constituted by H-shaped steel girders, and provided above the furnace through suspension pipes, hanger tiles, etc. so as to support the weight of such ceiling refractory materials, while combustion air ducts, gas and fuel supply ducts, and exhaust ducts, etc. are normally piped or laid through reinforcing fittings and support fittings fixed to the ceiling beams.
  • GB-A-3 542 14 proposes use of hollow beams as gas ducts and the refractory tiles are suspended therefrom with steel bearers. With this construction, the main steel bearers are thus in direct thermal contact with the refractory material of the ceiling.
  • an object of the present invention is to provide an improved ceiling construction for a heating furnace.
  • Another object of the present invention is to provide an improved ceiling beam construction which is simple in structure and highly reliable in performance, and can be readily incorporated into heating furnaces of various types at low cost.
  • the ceiling construction defined in the first paragraph of this specification is characterized by:
  • the ceiling construction generally includes a plurality of pairs of ceiling beam support posts S (Fig. 2) which are provided adjacent to respective outer faces of opposite side walls W of the heating furnace 1 fixed to studs R at predetermined intervals in the longitudinal direction of said side walls W; ceiling beams 6 connected between each pair of said ceiling beam support posts S; a number of auxiliary ceiling beams B provided between said ceiling beams 6 so as to extend in the longitudinal direction of said heating furnace 1; a plurality of ceiling suspension members 4 such as suspension pipes or the like suitably fixed to the auxiliary ceiling beams B so as to extend in the widthwise direction of the heating furnace 1; and hanger tiles 3 (Fig. 1) integrally provided with a ceiling refractory material 2 of the heating furnace 1 and suspended from said suspension members 4, for example, by metal hangers 5.
  • the ceiling beams 6 at least in the vicinity of burners 10 arranged in the widthwise direction of the furnace 1 are each formed into a closed cross section of approximately a square configuration for simultaneously utilizing the interior of the ceiling beams 6 as combustion air supply ducts 7.
  • the combustion air supply duct 7 thus provided in the ceiling beam 6 is connected, at a suitable position, for example, at one side of the beam 6, with a combustion air supply main duct 8 which is further coupled to an air supply unit A, while the ceiling beam 6 is further formed with a plurality of through-holes O in position, for example, at its other side, to which a branched pipe 9 having a plurality of air supply ducts 9a each connected to the burners 10 is coupled for communication with the air supply duct 7 formed in the ceiling beam 6.
  • a fuel supply unit F for supplying fuel to a nozzle 10a of the burner 10.
  • a suitable heat insulation material 11 may be lined along the internal walls of the combustion air supply ducts 7, and that the closed cross sectional shape of the ceiling beam 6 is not limited to the square shape, but may be modified into various other configurations.
  • the ceiling construction of the present invention may further include a hollow beam forming an exhaust duct or flue arrangement as shown in Figs. 2 and 3 for uniform heating of workpieces with a reduced heating time.
  • the workpieces to be treated are heated by burners provided at upper and lower portions of the furnace, while exhaust gases produced thereby are discharged into a flue or exhaust duct through one exhaust gas discharge opening provided in the ceiling portion at the workpiece charging side of the heating furnace. Therefore, the flow of combustion exhaust gases within the heating furnace is increased in amount at the upper surface side of the workpieces to be treated, thus resulting in a temperature difference more than necessary between the upper surfaces and lower surfaces of the workpieces, with a consequent increase in the heating time as well as various inconveniences at subsequent processes such as a rolling process, etc.
  • the exhaust duct arrangement may, for example, include a plurality of discharge openings (not particularly shown) for exhaust gases which openings are provided at predetermined intervals in upper and lower portions of the workpiece charging side (i.e. left side in Figs. 2 and 3) in the widthwise direction of the heating furnace, and are connected to an upper exhaust duct or flue E disposed between ceiling beams 6b at the left side in Figs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Supports For Pipes And Cables (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (7)

1. Deckenkonstruktion für einen Erwärmungsofen (1), die einen Deckenteil (2) des Erwärmungsofens (1) und mehrere Deckenträger (6) zum Tragen des Deckenteils (2) umfaßt, wobei mindestens einer der Träger (6) einen geschlossenen Abschnitt zur Verwendung seines Inneren als Gasleitung (7) aufweist, gekennzeichnet durch: mehrere Paare von Deckenträgerstützen (S), die benachbart zu entsprechenden Außenflächen gegenüberliegender Seitenwände (W) des Erwärmungsofens in vorbestimmten Abständen in Längsrichtung der Seitenwände (W) vorgesehen sind, wobei jedes Paar der Deckenträgerstützen (S) einen entsprechenden Deckenträger (6) trägt; eine Anzahl zwischen den Deckenträgern (6) vorgesehene Hilfsdeckenträger (B), die sich in Längsrichtung des Erwärmungsofens erstrecken; mehrere an den Hilfsdeckenträgern (B) befestigte Aufhängeteile, die sich in Richtung der Ofenbreite erstrecken, und durch einstückig mit dem Feuerfestmaterial (2) des Deckenteils des Erwärmungsofens (1) vorgesehene Hängesteine (3), die an den Aufhängeteilen (4) mittels Metallhängern (5) hängen.
2. Deckenkonstruktion nach Anspruch 1; dadurch gekennzeichnet, daß mindestens ein Träger (6) mit der Leitung (7) einen geschlossenen Querschnitt von im allgemeinen in quadratischer Form zur Verwendung seines Inneren als Verbrennungsluftzuführleitung aufweist.
3. Deckenkonstruktion nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Träger (6) mit geschlossenem Querschnitt an einer Seite mit einer Verbrennungsluftzuführhauptleitung (8) verbunden ist, die zu einer Luftversorgungseinheit (A) führt, und an der anderen Seite mit Brennern (10) des Erwärmungsofens (1) durch entsprechende Verteilerleitungen (9) verbunden ist, die mit der Gasleitung (7) in verbindung stehen.
4. Deckenkonstruktion nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Innere der Träger (6) mit einem wärmeisolierenden Material (11) ausgekleidet ist.
5. Deckenkonstruktion nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Abgasleitungsanordnung (E) vorgesehen ist, die mehrere Abgasauslaßöffnungen aufweist, die in vorbestimmten Abständen in oberen und unteren Teilen einer Werkstückzuführseite in Richtung der Ofenbreite vorgesehen sind, und die mit entsprechenden oberen und unteren Abgasleitungen des Erwärmungsofens (1) verbunden sind.
6. Deckenkonstruktion nach Anspruch 5, dadurch gekennzeichnet, daß die Abgasauslaßöffnungen in ihrer Querschnittsfläche entsprechend ihrem Ort in Richtung der Ofenbreite des erwärmungsofens (1) unterschiedlich sind.
7. Erwärmungsofen mit einer Deckenkonstruktion gemäß einem der vorhergehenden Ansprühe.
EP82102456A 1982-03-24 1982-03-24 Gewölbeträger für einen Wärmebehandlungsofen Expired EP0089398B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8282102456T DE3274576D1 (en) 1982-03-24 1982-03-24 Ceiling beam construction for heating furnace
EP82102456A EP0089398B1 (de) 1982-03-24 1982-03-24 Gewölbeträger für einen Wärmebehandlungsofen
AT82102456T ATE24044T1 (de) 1982-03-24 1982-03-24 Gewoelbetraeger fuer einen waermebehandlungsofen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82102456A EP0089398B1 (de) 1982-03-24 1982-03-24 Gewölbeträger für einen Wärmebehandlungsofen

Publications (2)

Publication Number Publication Date
EP0089398A1 EP0089398A1 (de) 1983-09-28
EP0089398B1 true EP0089398B1 (de) 1986-12-03

Family

ID=8188947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102456A Expired EP0089398B1 (de) 1982-03-24 1982-03-24 Gewölbeträger für einen Wärmebehandlungsofen

Country Status (3)

Country Link
EP (1) EP0089398B1 (de)
AT (1) ATE24044T1 (de)
DE (1) DE3274576D1 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE395967C (de) * 1924-05-24 Fritz Preuss Kippbarer Martinofen
GB259998A (en) * 1925-10-17 1927-07-28 Fritz Hillmann Improvements in arches for boiler furnaces
GB354214A (en) * 1930-05-02 1931-08-04 Hermann Roemer Improvements in or relating to cooling devices for furnace walls
DE1000954B (de) * 1953-12-28 1957-01-17 Suedwestfalen Ag Stahlwerke Luftgekuehltes Herdgewoelbe mit quer zur Gewoelbeachse angeordneten Kuehlkanaelen
FR1187129A (fr) * 1957-11-07 1959-09-07 Perfectionnements aux systèmes et dispositions pour la construction d'arches suspendues ou semi-auto-portantes avec carneaux de chauffage ou de récupération
DE1109824B (de) * 1959-01-21 1961-06-29 Lucien Chevalier Rohrfoermiger Tragkoerper fuer ein aufgehaengtes Gewoelbe
US3133512A (en) * 1962-08-31 1964-05-19 Levi S Longenecker Furnace nose
GB1032617A (en) * 1963-12-03 1966-06-15 Koho Es Gepipari Miniszterium A furnace and a refractory brick for use in the construction thereof
IT1017121B (it) * 1974-07-12 1977-07-20 Studiceram Volta piana autoportante per forni a tunnel in particolare per la cot tura di laterizi

Also Published As

Publication number Publication date
EP0089398A1 (de) 1983-09-28
ATE24044T1 (de) 1986-12-15
DE3274576D1 (en) 1987-01-15

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