EP0105302B1 - Stützen für heizkörper zum verwenden bei glühöfen - Google Patents

Stützen für heizkörper zum verwenden bei glühöfen Download PDF

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Publication number
EP0105302B1
EP0105302B1 EP83901180A EP83901180A EP0105302B1 EP 0105302 B1 EP0105302 B1 EP 0105302B1 EP 83901180 A EP83901180 A EP 83901180A EP 83901180 A EP83901180 A EP 83901180A EP 0105302 B1 EP0105302 B1 EP 0105302B1
Authority
EP
European Patent Office
Prior art keywords
support
heating body
anyone
foregoing
support according
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
EP83901180A
Other languages
English (en)
French (fr)
Other versions
EP0105302A1 (de
Inventor
André Henri Léon ROMBOUTS
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.)
ArcelorMittal Liege Upstream SA
Original Assignee
Cockerill Sambre SA
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 Cockerill Sambre SA filed Critical Cockerill Sambre SA
Priority to AT83901180T priority Critical patent/ATE21122T1/de
Publication of EP0105302A1 publication Critical patent/EP0105302A1/de
Application granted granted Critical
Publication of EP0105302B1 publication Critical patent/EP0105302B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • 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
    • F27D1/0003—Linings or walls
    • F27D1/0036—Linings or walls comprising means for supporting electric resistances in the furnace

Definitions

  • the present invention relates to improved supports intended in particular for heating bodies of annealing ovens.
  • the heaters are used in particular in ovens ensuring the continuous annealing of steel strips.
  • a coil of steel strip is unwound and the steel strip passes through a degreasing device. It is dried by hot air, before entering the oven which is divided into a heating section and a holding section. There is a neutral atmosphere and a pressure higher than atmospheric pressure to avoid any risk of contamination.
  • the strip is guided during its journey in the oven between the walls formed by heating bodies arranged in staggered rows. Leaving the oven, this annealed strip is wound on a coil.
  • Document GB-A-1 396796 relates to a support means for U-shaped radiant tubes, which consists of a roller fixed to the wall of the furnace, on which the tube can slide without friction during thermal expansion.
  • This means has the drawback of being bulky and of being unable to be used in ovens providing continuous annealing of steel strips, for example.
  • Document US-A-2652037 relates to heating body supports (radiant tubes) in the form of a double pin supported by a simple support fixed in a tube perpendicular to the radiant tube.
  • the expansion of the radiant tube causes a sliding on the supports which is the cause of wear, micro-welds, etc.
  • the tubes in which the supports are fixed are bulky and prevent the continuous passage of a steel strip which goes around radiant tubes arranged in staggered rows.
  • Document US-A-2204144 relates to double pin heating bodies supported or suspended and spaced apart by members allowing the expansion of the assembly and serving as sliding points which thus allow relative movement of an element of the heating body. compared to each other ..
  • This excessive pace can result from too high a speed of unwinding of the strip, from a quality of product for which the heating speeds were not provided, from an irregularity in the maintenance frequencies which leaves the oven reduced part of its heating capacity.
  • the support integral with the external wall of the oven deforms and introduces a torque which causes the heating body to buckle.
  • a similar torque can also be generated by parasitic voltages created during the execution of the welds of the tubular elements and of the curves which would be released during the first firing of the heating body and / or after a repair.
  • the present invention aims to provide a solution to these problems by providing a heating body support device for annealing furnaces allowing the free expansion of the heating body and completely eliminating the risk of creep of the free end without adversely affecting its capacity. or the proper functioning of the oven.
  • This support is formed in double pin and traversed by hot gases coming from a burner arranged at one end and evacuated by the other end, the contact between two curves of the pin being avoided by spacers and a support additional being provided in the outer wall of the oven and it is characterized in that it comprises as a spacer a connecting rod connecting together the two outer hairpin curves of the heating body and as additional support provided in the outer wall of the oven, a support for the upper pin sliding on a tubular support arm rigidly fixed in the wall of the oven allowing movements in the direction of sliding of this support.
  • the round shape of the support and the support allows the automatic centering of the heating body and the important play of these parts between them allows a very easy placement.
  • the connecting rod connecting the two curves in "pin of the heating body allows a relative movement of the tube elements between them and maintains by suspension the lower pin to the upper pin.
  • the slip point which supported the upper pin on the lower pin is eliminated.
  • the heating body is supported by a support welded to its upper part and sliding on a support arm rigidly fixed in the wall of the oven.
  • the support is advantageously chosen so as to allow movement in the direction of the support arm so that the heating body is not subjected to high stresses.
  • the support arm is advantageously tubular, is closed at its inner end by a welded pellet and is preferably stuffed with a thermal wadding or other insulator.
  • the heating body 1 with a double pin 2, 3 is made of stainless steel. It is traversed by hot gases from a burner disposed at one end 4 which are discharged at the other end 5 according to the embodiment belonging to the state of the art illustrated in Figure 1. Organs of spacing (6, 7) avoid contact of two tubular elements during expansion.
  • a third support 8 housed in the outer wall of the oven keeps the heating body in balance so that it does not sag at high temperatures while allowing sliding due to expansion.
  • This arrangement has the disadvantage that accidentally high temperatures cause microwelds, in particular in point 7. Consequently, the upper tube is no longer free in its expansion, which causes it to swell and therefore to shift in relation to the burner flame. .
  • the part of the support 8 integral with the oven deforms and causes the heating body to buckle over the height 9.
  • FIG. 2 the support 7 of the heating body 1 which is provided in the case of FIG. 1, is replaced by a connecting rod 17.
  • the support 18 advantageously slides on a support arm 19, preferably of stainless steel 25/20 or 37/18, rigidly fixed in the outer wall 20 of the oven.
  • This support 18 is formed so as to allow movement in the direction of the support arm 19 and in directions perpendicular to the support arm 19 by means of a play advantageously chosen.
  • the connecting rod 17 fixed by pivots between the gussets 21 and 22 makes the lower pin integral with the upper pin by allowing movements due to thermal expansion.
  • the sliding support in the form of a cup 18, preferably made of stainless steel 25/20 or 37/18, is welded to the pin and held by the gussets 22 and 23.
  • the support arm 19 is preferably tubular, closed at its inner end by a welded pad 28 and fixed to the wall 20 of the furnace by means of an anchoring device 25. In order to reduce the thermal bridges, it is stuffed with '' a wadded thermal insulator (rock wool, etc.).
  • the device of the invention still has additional advantages.
  • This new device can be easily placed and possibly replaced from outside the oven, using conventional tools.
  • the support arm can be equipped with a gauge 26 consisting for example of a 25 x 5 mm square dish which indicates the behavior of this support, inside the oven from the outside of the latter.
  • the device of the invention makes it possible to allow all of the expansion towards the interior of the oven. Consequently, the end 4 of the upper tube can be welded to its base plate; this avoids the use of complicated systems, often used by. manufacturers, for fixing the burners.
  • the device of the invention therefore makes the oven more efficient, without however increasing its price.
  • the installation and maintenance service can save a lot of time due to the simplicity of installation and easy access.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Gas Burners (AREA)

Claims (7)

1. Stütze für Heizkörper zum Verwenden bei Glühöfen, in der Form einer doppelten Haarnadelkurve (2, 3), der von heißen Gasen durchlaufen wird, die von einem an einem Ende (4) angebrachten Brenner stammen und am anderen Ende (5) ausgestoßen werden, wobei der Kontakt zweier Haarnadelkurven durch Abstandhalter verhindert wird und eine zusätzliche Stütze in der Außenwand des Ofens vorgesehen ist, dadurch gekennzeichnet, daß sie, als Abstandhalter, eine Gelenkstange (17), die die beiden äußeren Haarnadelkurven (2, 3) des Heizkörpers untereinander verbindet, und, als zusätzliche Stütze in der Außenwand des Ofens, eine Stütze der oberen Haarnadel aufweist, die auf einen rohrförmigen fest in der Ofenwand verankerten Tragarm (19) gleitet (18), der Verschiebungen in Richtung der Gleitbewegungen dieser Stütze zulässt, aufweist.
2. Stütze nach Anspruch 1 dadurch gekennzeichnet, daß an der Gelenkstange angepaßte Versteifungsbleche (21, 22) an beiden äußeren Haarnadelkurven (2, 3) des Heizkörpers (1) festgeschweißt sind.
3. Stütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der rohrförmige Tragarm (19), der an seinem nach innen orientierten Ende durch einen Pfropfen (28) verschlossen ist, mit einem thermischen Isolierstoff vollgestopft ist.
4. Stütze nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Stütze (18) auf die obere Haarnadelkurve (2) des Heizkörpers festgeschweißt ist und durch Versteifungsbleche (22, 23) festgehalten wird.
5. Stütze nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Stütze (18) und der Tragarm (19) aus rostfreiem Stahl 20/25 oder 37/18 bestehen.
6. Stütze nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Versteifungsbleche (21, 22, 23) und die Gelenkstange (17) aus rostfreiems Stahl 25/20 bestehen.
7. Stütze nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß der Tragarm (12) mit einer Meßlehre ausgestattet ist, die aus einem flachen Winkel von 25 x 25 mm besteht.
EP83901180A 1982-03-26 1983-03-25 Stützen für heizkörper zum verwenden bei glühöfen Expired EP0105302B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901180T ATE21122T1 (de) 1982-03-26 1983-03-25 Stuetzen fuer heizkoerper zum verwenden bei gluehoefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84040 1982-03-26
LU84040A LU84040A1 (fr) 1982-03-26 1982-03-26 Supports ameliores de corps de chauffe de fours de recuit

Publications (2)

Publication Number Publication Date
EP0105302A1 EP0105302A1 (de) 1984-04-18
EP0105302B1 true EP0105302B1 (de) 1986-07-30

Family

ID=19729847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901180A Expired EP0105302B1 (de) 1982-03-26 1983-03-25 Stützen für heizkörper zum verwenden bei glühöfen

Country Status (7)

Country Link
US (1) US4520789A (de)
EP (1) EP0105302B1 (de)
JP (1) JPS59501270A (de)
DD (1) DD207977A5 (de)
DE (1) DE3364852D1 (de)
LU (1) LU84040A1 (de)
WO (1) WO1983003428A1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141594A3 (de) * 1983-10-21 1986-03-05 Air Products And Chemicals, Inc. Gerät zum Heizen
FR2643447B1 (fr) * 1989-02-17 1991-10-04 Stein Heurtey Systeme de tubes radiants pour fours de chauffage
US5845631A (en) * 1997-08-21 1998-12-08 Kerry Ingredients, Inc. Heat exchanger for convection baking ovens
DE202008009065U1 (de) * 2008-07-04 2008-10-09 WS Wärmeprozesstechnik GmbH Strahlungsheizanordnung mit Verzugkompensation
AT508368B1 (de) 2009-10-13 2011-01-15 Ebner Ind Ofenbau Vorrichtung zur wärmebehandlung von blechbändern
AT508264B1 (de) * 2009-10-13 2010-12-15 Ebner Ind Ofenbau Vorrichtung zur wärmebehandlung von blechbändern
US10126063B2 (en) 2011-02-14 2018-11-13 Massimiliano Bisson Radiant tubular element for industrial plants and similar
US10011887B2 (en) * 2013-01-02 2018-07-03 Massimiliano Bisson Support device for radiant tubes
JP6028595B2 (ja) * 2013-01-29 2016-11-16 新日鐵住金株式会社 ラジアントチューブを用いた加熱炉
CN104152660B (zh) * 2014-08-28 2016-05-18 航天精工股份有限公司 一种紧固件的局部退火定位装置
BE1027839B1 (fr) * 2019-12-10 2021-07-08 Drever International Sa Élément de chauffage radiant à extrémité libre
DE102020100748A1 (de) * 2020-01-14 2021-07-15 Loi Thermprocess Gmbh Vorrichtung zum Abstützen von mindestens zwei Strahlheizrohren in einem Ofenraum sowie Industrieofen
CN117489876B (zh) * 2024-01-02 2024-03-22 杭州万全金属软管有限公司 一种金属软管与燃气灶的连接结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204144A (en) * 1935-10-31 1940-06-11 Babcock & Wilcox Co Fluid heat exchange apparatus
GB487764A (en) * 1937-03-01 1938-06-24 Surface Combustion Corp Improvements in heat radiating combustion flues for furnaces
FR861541A (fr) * 1938-11-15 1941-02-11 Armco Sa Perfectionnements aux appareils et dispositifs de chauffage industriel
US2200731A (en) * 1938-11-15 1940-05-14 Lee Wilson Sales Corp Heating apparatus
US2652037A (en) * 1947-09-03 1953-09-15 Du Pont Heat exchange apparatus
US2822798A (en) * 1953-10-19 1958-02-11 Harold N Ipsen Burner tube assembly for heat treating furnaces
US3079910A (en) * 1960-06-27 1963-03-05 Bloom Eng Co Inc Recuperative radiant tube burner mechanism
GB1396796A (en) * 1972-07-21 1975-06-04 Skoda Np Heat radiating tube support
US3920383A (en) * 1974-06-20 1975-11-18 Electric Furnace Co Fluted surface heat exchanger

Also Published As

Publication number Publication date
US4520789A (en) 1985-06-04
DD207977A5 (de) 1984-03-21
JPS59501270A (ja) 1984-07-19
DE3364852D1 (en) 1986-09-04
WO1983003428A1 (fr) 1983-10-13
LU84040A1 (fr) 1983-11-17
EP0105302A1 (de) 1984-04-18

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