EP0280079A1 - Walking beam furnace - Google Patents

Walking beam furnace Download PDF

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Publication number
EP0280079A1
EP0280079A1 EP88101516A EP88101516A EP0280079A1 EP 0280079 A1 EP0280079 A1 EP 0280079A1 EP 88101516 A EP88101516 A EP 88101516A EP 88101516 A EP88101516 A EP 88101516A EP 0280079 A1 EP0280079 A1 EP 0280079A1
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EP
European Patent Office
Prior art keywords
supports
walking beam
beam furnace
walking
slots
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Withdrawn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
EP88101516A
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German (de)
French (fr)
Inventor
Helmut Springer
Dieter Schwab
Augusto Funghini
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.)
Italimpianti SpA
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Italimpianti SpA
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Publication date
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Publication of EP0280079A1 publication Critical patent/EP0280079A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace walking beam furnace

Definitions

  • the invention relates to a walking beam furnace with a hearth made of fixed beams and walking beams arranged on supports guided through slots in the furnace floor.
  • Such a walking beam furnace is described in DE-OS 34 40 126.
  • the bottom slots must be large enough to ensure free movement of the walking beam supports in the feed direction without jamming due to the inevitable manufacturing tolerances and thermal expansion.
  • the length of the bottom opening is 600 mm and the width is about 300 mm. This results in a free space outside the column area of approximately 400 mm in length and 300 mm in width. Since a large number of such floor openings are present in the walking beam furnace, considerable radiation losses occur, which results in considerable heat loss.
  • the invention is therefore based on the object to improve the walking beam furnace of the type mentioned in such a way that the heat losses are largely reduced.
  • the covers are preferably fastened to the connecting piece and therefore move not only in the feed direction but also in the lifting direction with the supports.
  • each cover consists of an elongated steel shoe and an insulation made of refractory material covering the bottom slots and covering it.
  • the steel shoe can consist of two steel plates, each encompassing one support, reinforced with radial ribs and welded to the support.
  • the covers are at a short distance from the furnace floor, so that only little radiation can escape in this position.
  • the radiation losses during the lifting and advancing movement of the walking beams are low, since the transport through the walking beams takes place within a few seconds, followed by a transport break of a few minutes, during which the annealing material rests on the fixed beams and the walking beams are in their lower position, so that the bottom slots are essentially covered by the covers.
  • a walking beam furnace 1 consists essentially of a refractory housing 2 with ceiling and side burners 3.
  • Fixed beams 4 rest with supports 5 on the furnace floor 6, while supports 7 for walking beams 8 protrude through slots in the furnace floor 6 and are arranged on a common travel frame 10.
  • the cylinder-driven moving frame 10 travels with rollers on flat rails, which are arranged on a lifting frame driven with lifting cylinders and sliding with rollers on inclined rails, which results in an oblique lifting and a horizontal movement of the lifting beam 8.
  • Elongated covers are arranged on the tubular supports 7 for the walking beams 8 in the area of the bottom slots 9, which consist of steel shoes 12 fastened to the supports 7 and these enclosing insulations made of refractory material. These insulations are not shown in detail.
  • the steel shoes 12 consist of two halves 14, 15, each of which has a semicircular recess, which to together a bore 13 for the support 7 result.
  • Radial reinforcing ribs 16 are welded under the steel shoe halves 14, 15.
  • a steel intermediate ring can also lie on each insulating element, which also has positioning lugs on both sides. These positioning lugs hold insulating rings made of refractory material arranged around the supports 7 if the insulating rings themselves have no such positioning lugs.
  • the steel shoes 12 can be produced both in a welded version - as shown - and in a cast steel version.

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

Abstract

Hubbalkenofen (1) mit einem Herd aus Festbalken (4) und auf durch Schlitze (9) im Ofenboden (6) geführten Stützen (7) angeordneten Hubbalken (8), bei dem, um Wärmeverluste und ein unerwünschtes Aufheizen der Stützen (7) im Bereich der Bodenschlitze (9) zu vermeiden, mit den Stützen (7) wenigstens in Vorschubrichtung bewegliche Abdeckungen (12) für die Bodenschlitze (9) angeordnet sind.Walking beam furnace (1) with a stove made of fixed beams (4) and walking beams (8) arranged on slots (9) in the furnace floor (6) through supports (7), in which to prevent heat loss and undesired heating of the supports (7) Avoid area of the bottom slots (9), with the supports (7) at least in the feed direction movable covers (12) for the bottom slots (9) are arranged.

Description

Die Erfindung betrifft einen Hubbalkenofen mit einem Herd aus Festbalken und auf durch Schlitze im Ofenboden geführ­ten Stützen angeordneten Hubbalken.The invention relates to a walking beam furnace with a hearth made of fixed beams and walking beams arranged on supports guided through slots in the furnace floor.

Ein derartiger Hubbalkenofen ist in der DE-OS 34 40 126 beschrieben. Bei diesem Hubbalkenofen müssen die Boden­schlitze groß genug sein, um eine freie Beweglichkeit der Hubbalkenstützen in Vorschubrichtung zu gewährleisten, ohne daß infolge der unvermeidlichen Herstellungstoleranzen und Wärmedehnungen ein Klemmen auftritt.Such a walking beam furnace is described in DE-OS 34 40 126. In this walking beam furnace, the bottom slots must be large enough to ensure free movement of the walking beam supports in the feed direction without jamming due to the inevitable manufacturing tolerances and thermal expansion.

Für einen Vorschub und einen Hub von z.B. jeweils etwa 300 mm und einen Stützendurchmesser von etwa 200 mm beträgt daher die Länge der Bodenöffnung 600 mm und die Breite etwa 300 mm. Es ergibt sich somit außerhalb des Stützenbereiches ein Freiraum von etwa 400 mm in der Länge und 300 mm in der Breite. Da im Hubbalkenofen eine große Zahl solcher Boden­öffnungen vorhanden ist, treten erhebliche Strahlungsver­luste auf, was einen erheblichen Wärmeverlust zur Folge hat.For a feed and a stroke of e.g. each about 300 mm and a column diameter of about 200 mm, the length of the bottom opening is 600 mm and the width is about 300 mm. This results in a free space outside the column area of approximately 400 mm in length and 300 mm in width. Since a large number of such floor openings are present in the walking beam furnace, considerable radiation losses occur, which results in considerable heat loss.

Der Erfindung liegt daher die Aufgabe zugrunde, den Hubbal­kenofen der eingangs erwähnten Art so zu verbessern, daß sich die Wärmeverluste weitgehend vermindern.The invention is therefore based on the object to improve the walking beam furnace of the type mentioned in such a way that the heat losses are largely reduced.

Diese Aufgabe wird bei einem Hubbalkenofen der eingangs erwähnten Art erfindungsgemäß durch mit den Stützen wenig­stens in Vorschubrichtung bewegliche Abdeckungen für die Bodenschlitze gelöst.This object is achieved according to the invention in a walking beam furnace of the type mentioned at the outset by covers for the bottom slots which are movable with the supports at least in the feed direction.

Vorzugsweise sind die Abdeckungen an den Stutzen befestigt und bewegen sich daher mit den Stützen nicht nur in Vor­schubrichtung, sondern auch in Hubrichtung.The covers are preferably fastened to the connecting piece and therefore move not only in the feed direction but also in the lifting direction with the supports.

Vorteilhafterweise besteht jede Abdeckung aus einem läng­lichen Stahlschuh und einer diesen umhüllenden, die Boden­schlitze überdeckenden Isolierung aus feuerfestem Material. Der Stahlschuh kann dabei aus zwei, eine Stütze jeweils halb umgreifende, mit radialen Rippen verstärkte und mit der Stütze verschweißte Stahlplatten bestehen.Advantageously, each cover consists of an elongated steel shoe and an insulation made of refractory material covering the bottom slots and covering it. The steel shoe can consist of two steel plates, each encompassing one support, reinforced with radial ribs and welded to the support.

Die Abdeckungen weisen in der Ruhestellung der Hubbalken einen geringen Abstand zum Ofenboden auf, so das in dieser Stellung nur wenig Strahlung austreten kann. Die Strahlungs­verluste während der Hub- und Vorschubbewegung der Hubbal­ken sind gering, da der Transport durch die Hubbalken inner­halb weniger Sekunden geschieht, worauf eine Transportpause von einigen Minuten folgt, während der das Glühgut auf den Festbalken ruht und sich die Hubbalken in ihrer unteren Stellung befinden, so daß die Bodenschlitze durch die Ab­deckungen im wesentlichen abgedeckt sind.In the rest position of the walking beams, the covers are at a short distance from the furnace floor, so that only little radiation can escape in this position. The radiation losses during the lifting and advancing movement of the walking beams are low, since the transport through the walking beams takes place within a few seconds, followed by a transport break of a few minutes, during which the annealing material rests on the fixed beams and the walking beams are in their lower position, so that the bottom slots are essentially covered by the covers.

Die Erfindung wird nachstehend anhand eines in der Zeich­nung dargestellten Ausführungsbeispiels des näheren erläu­tert. In der Zeichnung zeigen:

  • Fig. 1: eine perspektivische Darstellung des Ausschnitts eines Hubbalkenofens,
  • Fig. 2: eine teilweise Schnittansicht gemäß der Linie II-II in Fig. 1,
  • Fig. 3: eine teilweise Schnittansicht entlang der Linie III-III in Fig. 1,
  • Fig. 4: eine Draufsicht auf einen erfindungsgemäßen Stahl­schuh,
  • Fig. 5: einen Schnitt entlang der Linie V-V in Fig. 4 und
  • Fig. 6: eine Seitenansicht des Stahlschuhs der Fig. 4.
The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows:
  • 1 is a perspective view of the detail of a walking beam furnace,
  • 2: a partial sectional view along the line II-II in Fig. 1,
  • 3: a partial sectional view along the line III-III in Fig. 1,
  • 4: a top view of a steel shoe according to the invention,
  • 5 shows a section along the line VV in Fig. 4 and
  • 6: a side view of the steel shoe of FIG. 4.

Ein Hubbalkenofen 1 besteht im wesentlichen aus einem feu­erfesten Gehäuse 2 mit Decken- und Seitenbrennern 3. Fest­balken 4 ruhen mit Stützen 5 auf dem Ofenboden 6, während Stützen 7 für Hubbalken 8 durch Schlitze im Ofenboden 6 ragen und auf einem gemeinsamen Verfahrrahmen 10 angeordnet sind. Der mit Zylindern angetriebene Verfahrrahmen 10 fährt mit Rollen auf ebenen Schienen, die auf einem mit Hubzylin­dern angetriebenen und mit Rollen auf geneigten Schienen gleitenden Hubrahmen angeordnet sind, woraus sich eine schräge Hub- und eine Horizontalbewegung der Hubbalken 8 ergibt.A walking beam furnace 1 consists essentially of a refractory housing 2 with ceiling and side burners 3. Fixed beams 4 rest with supports 5 on the furnace floor 6, while supports 7 for walking beams 8 protrude through slots in the furnace floor 6 and are arranged on a common travel frame 10. The cylinder-driven moving frame 10 travels with rollers on flat rails, which are arranged on a lifting frame driven with lifting cylinders and sliding with rollers on inclined rails, which results in an oblique lifting and a horizontal movement of the lifting beam 8.

An der rohrförmigen Stützen 7 für die Hubbalken 8 sind im Bereich der Bodenschlitze 9 längliche Abdeckungen ange­ordnet, die aus an den Stützen 7 befestigten Stahlschuhen 12 und diese umhüllende Isolierungen aus feuerfestem Mate­rial bestehen. Diese Isolierungen sind im einzelnen nicht dargestellt.Elongated covers are arranged on the tubular supports 7 for the walking beams 8 in the area of the bottom slots 9, which consist of steel shoes 12 fastened to the supports 7 and these enclosing insulations made of refractory material. These insulations are not shown in detail.

Die Stahlschuhe 12 bestehen aus zwei Hälften 14, 15, die jeweils eine halbkreisförmige Ausnehmung aufweisen, die zu­ sammen eine Bohrung 13 für die Stütze 7 ergeben. Unter die Stahlschuhhälften 14, 15 sind radiale Verstärkungsrippen 16 geschweißt. Auf der Oberfläche der Stahlschuhe 12 befinden sich Nasen 18, die mit entsprechenden Vertiefungen in der Isolierung zusammenwirken und diese auf dem Stahlschuh 12 positionieren.The steel shoes 12 consist of two halves 14, 15, each of which has a semicircular recess, which to together a bore 13 for the support 7 result. Radial reinforcing ribs 16 are welded under the steel shoe halves 14, 15. There are lugs 18 on the surface of the steel shoes 12, which cooperate with corresponding depressions in the insulation and position them on the steel shoe 12.

Auf jedem Isolierelement kann ein stählerner Zwischenring liegen, der ebenfalls Positioniernasen auf beiden Seiten aufweist. Diese Positioniernasen halten um die Stützen 7 herum angeordnete Isolierringe aus feuerfestem Material, wenn die Isolierringe selber keine derartigen Positionierna­sen aufweisen.A steel intermediate ring can also lie on each insulating element, which also has positioning lugs on both sides. These positioning lugs hold insulating rings made of refractory material arranged around the supports 7 if the insulating rings themselves have no such positioning lugs.

Die Stahlschuhe 12 lassen sich sowohl in geschweißter Aus­führung - wie dargestellt - als auch in Stahlgußausführung herstellen.The steel shoes 12 can be produced both in a welded version - as shown - and in a cast steel version.

Claims (4)

1. Hubbalkenofen mit einem Herd aus Festbalken und auf durch Schlitze im Ofenboden geführten Stützen angeord­neten Hubbalken, gekennzeichnet durch mit den Stützen (7) mindestens in Vorschubrichtung bewegliche Abdeckun­gen (12) für die Bodenschlitze (9).1. walking beam furnace with a stove made of fixed beams and walking beams arranged on supports guided through slots in the furnace floor, characterized by covers (12) for the bottom slots (9) that can be moved with the supports (7) at least in the feed direction. 2. Hubbalkenofen nach Anspruch 1, dadurch gekennzeichnet, daß die Abdeckungen (12) an den Stützen (7) angeordnet sind.2. walking beam furnace according to claim 1, characterized in that the covers (12) on the supports (7) are arranged. 3. Hubbalkenofen nach Anspruch 2, dadurch gekennzeichnet, daß jede Abdeckung aus einem länglichen Stahlschuh (12) und einer diesen umhüllenden und die Bodenschlit­ze (9) überdeckenden Isolierung aus feuerfestem Materi­al besteht.3. walking beam furnace according to claim 2, characterized in that each cover consists of an elongated steel shoe (12) and this enveloping and the bottom slots (9) covering insulation made of refractory material. 4. Hubbalkenofen nach Anspruch 3, dadurch gekennzeichnet, daß der Stahlschuh (12) aus zwei, eine Stütze (7) je­weils halb umgreifende, mit radialen Rippen (16) ver­stärkte, an der Stütze (7) befestigte Stahlplatten (14, 15) besteht.4. walking beam furnace according to claim 3, characterized in that the steel shoe (12) consists of two, a support (7) each semi-encompassing, with radial ribs (16) reinforced on the support (7) fixed steel plates (14, 15) .
EP88101516A 1987-02-24 1988-02-03 Walking beam furnace Withdrawn EP0280079A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3705822 1987-02-24
DE19873705822 DE3705822A1 (en) 1987-02-24 1987-02-24 RIFLE BAR OVEN

Publications (1)

Publication Number Publication Date
EP0280079A1 true EP0280079A1 (en) 1988-08-31

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ID=6321616

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Application Number Title Priority Date Filing Date
EP88101516A Withdrawn EP0280079A1 (en) 1987-02-24 1988-02-03 Walking beam furnace

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US (1) US4863376A (en)
EP (1) EP0280079A1 (en)
CA (1) CA1294494C (en)
DE (1) DE3705822A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0711970A1 (en) * 1994-11-11 1996-05-15 D.W. Schulte GmbH & Co. KG Shield used on the beam conveyor of a walking beam furnace
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
US20220090862A1 (en) * 2019-03-05 2022-03-24 Sms Group S.P.A. Furnace with movable beam load handling system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017830A1 (en) * 1979-03-30 1980-10-29 Nippon Steel Corporation Slab heating furnace
JPS59200717A (en) * 1983-04-28 1984-11-14 Nippon Steel Corp Shielding construction in aperture part of moving beam post of billet heating furnace
JPS6096711A (en) * 1983-10-31 1985-05-30 Ishikawajima Harima Heavy Ind Co Ltd Operation of walking beam
JPS60187618A (en) * 1984-03-06 1985-09-25 Ishikawajima Harima Heavy Ind Co Ltd Heat sealing device of walking beam type heating furnace

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583342B1 (en) * 1967-10-25 1973-01-25 Brobu Industrie Ofenbau Walking beam furnace
FR1561203A (en) * 1967-12-20 1969-03-28
US3749550A (en) * 1971-12-16 1973-07-31 Loftus Engineering Corp Walking beam furnace
DE2204602C2 (en) * 1972-02-01 1973-12-06 Didier-Kellogg Industrieanlagenbau Gmbh, 4300 Essen Slot seal for walking beam oven
DE2253105A1 (en) * 1972-10-30 1974-05-09 Brobu Industrie Ofenbau THROUGH-OUT FOLDER WITH LOWER BEAM CONVEYOR
DE3306911A1 (en) * 1983-02-26 1984-08-30 Ruhrgas Ag, 4300 Essen METHOD FOR OPERATING A TURNTABLE OVEN OR THE LIKE, Purged With Shielding Gas
DE3440126C2 (en) * 1984-11-02 1993-11-18 Italimpianti Deutschland Gmbh Walking beam furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017830A1 (en) * 1979-03-30 1980-10-29 Nippon Steel Corporation Slab heating furnace
JPS59200717A (en) * 1983-04-28 1984-11-14 Nippon Steel Corp Shielding construction in aperture part of moving beam post of billet heating furnace
JPS6096711A (en) * 1983-10-31 1985-05-30 Ishikawajima Harima Heavy Ind Co Ltd Operation of walking beam
JPS60187618A (en) * 1984-03-06 1985-09-25 Ishikawajima Harima Heavy Ind Co Ltd Heat sealing device of walking beam type heating furnace

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 36 (C-328)[2093], 13. Februar 1986; & JP-A-60 187 618 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 25-09-1985 *
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 237 (C-305)[1960], 24. September 1985; & JP-A-60 096 711 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 30-05-1985 *
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 66 (C-271)[1789], 26. März 1985; & JP-A-59 200 717 (SHIN NIPPON SEITETSU K.K.) 14-11-1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0711970A1 (en) * 1994-11-11 1996-05-15 D.W. Schulte GmbH & Co. KG Shield used on the beam conveyor of a walking beam furnace
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
US4863376A (en) 1989-09-05
DE3705822A1 (en) 1988-09-01
CA1294494C (en) 1992-01-21

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