AT377602B - COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS - Google Patents

COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS

Info

Publication number
AT377602B
AT377602B AT166282A AT166282A AT377602B AT 377602 B AT377602 B AT 377602B AT 166282 A AT166282 A AT 166282A AT 166282 A AT166282 A AT 166282A AT 377602 B AT377602 B AT 377602B
Authority
AT
Austria
Prior art keywords
ovens
cooling device
constructions
electric arc
cooling
Prior art date
Application number
AT166282A
Other languages
German (de)
Other versions
ATA166282A (en
Original Assignee
Sidepal 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 Sidepal Sa filed Critical Sidepal Sa
Priority to AT166282A priority Critical patent/AT377602B/en
Publication of ATA166282A publication Critical patent/ATA166282A/en
Application granted granted Critical
Publication of AT377602B publication Critical patent/AT377602B/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/12Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00Cooling of furnaces or of charges therein
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0041Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00Cooling of furnaces or of charges therein
    • F27D2009/0002Cooling of furnaces
    • F27D2009/0018Cooling of furnaces the cooling medium passing through a pattern of tubes
    • F27D2009/0021Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

  

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   Die Erfindung bezieht sich gattungsgemäss auf eine Kühlvorrichtung für Wandkonstruktionen und/oder Deckelkonstruktionen von Industrieöfen, insbesondere von   Elektrolichtbogenöfen,   mit einer
Mehrzahl von nebeneinander und mit Abstandszwischenraum voneinander angeordneten Kühlrohren, die endseitig aufgeschweisste Umlenkelemente aufweisen und dadurch zu einem schlangenlinienförmi- gen (anders ausgedrückt mäanderförmigen)   Kühlmittelströmungskanal   zusammengefasst sind. 



   Bei der (aus der Praxis) bekannten gattungsgemässen Ausführungsform ist der Abstandszwi- schenraum durch Flacheisen oder Stege überbrückt, die zwischen benachbarten Kühlrohren, in bezug auf das Innere zumeist aussenseitig, angeordnet und mit den Kühlrohren verschweisst sind. 



   Diese Flacheisen oder Stege sind hauptsächlich erforderlich, um dem Aggregat die statisch er- forderliche Gestaltfestigkeit und Stabilität zu verleihen. Die bekannte Ausführungsform ist jedoch nicht frei von Nachteilen. Unterschiedliche Wärmedehnungen zwischen den Kühlrohren und den
Flacheisen bzw. Stegen sowie Temperaturwechselbeanspruchung bedingen vorzeitige Zerstörungen und Rissbildungen im Bereich der Schweissnähte. Auch beobachtet man im Bereich der Schweissnähte
Spannungskorrosion. Da die einzelnen Kühlrohre mit Abstandszwischenraum voneinander angeordnet sind, sind die Umlenkelemente halbkreisförmige Rohrbogen, wobei der Krümmungsradius dem Ab- stand der Kühlrohre angepasst ist. Das verlangt einen beachtlichen schweisstechnischen Aufwand, weil beide Rohrbogenenden mit Umfangsschweissung an die angeschlossenen Kühlrohre anzuschweissen sind. 



   Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemässe Kühlvorrichtung so weiter auszubilden, dass Flacheisen oder Stege zwischen den benachbarten Kühlrohren nicht mehr erforderlich sind und folglich die vorzeitigen Zerstörungen im Bereich der Schweissnähte zwischen den Kühlrohren und Stegen bzw. Flacheisen nicht mehr auftreten. 



   Zur Lösung dieser Aufgabe lehrt die Erfindung, dass die Kühlrohre an ihren mit den Umlenkelementen verbundenen Enden einander zugewendete Aufweitungen aufweisen, die aneinander anliegen, den Abstandszwischenraum definieren und an ihren Anlageflächen miteinander verschweisst sind, und dass auf die verschweissten Enden der Kühlrohre als Umlenkelemente Kappen aufgeschweisst sowie die Kühlrohre der Kühlvorrichtung durch die Kappen zu einem selbsttragenden Aggregat vereinigt sind. 



   Die Erfindung geht von der Erkenntnis aus, dass bei der erfindungsgemässen Kühlvorrichtung einerseits die Kappen und anderseits die Kühlrohre mit ihren Aufweitungen Bauteile bzw. Ausbildungen darstellen, die ein grosses Flächenträgheitsmoment aufweisen und folglich dem Aggregat die erforderliche Gestaltfestigkeit und Stabilität sowie die Eigenschaft verleihen, als selbsttragendes Aggregat eingesetzt werden zu können. Wegen der Aufweitung der Enden der Kühlrohre besteht ohne Beeinträchtigung der Strömungsquerschnitte die Möglichkeit, die Kappen mit einer gegenüber den Kühlrohren vergrösserten Wanddicke auszurüsten. 



   Die erfindungsgemässe Kühlvorrichtung kann unmittelbar in einen Industrieofen eingebaut werden. Es besteht aber auch die Möglichkeit, auf der dem Ofenraum des zugeordneten Industrieofens abgewendeten Seite ein als Montagehilfe und/oder Ofenwand dienendes Abdeckblech - ohne Schweissverbindung mit den Kühlrohren und/oder Kappen - anzuordnen. Dient dieses Abdeckblech als Montagehilfe, so erlaubt es auf einfache Weise die Montage der Kühlvorrichtung. Das Montageblech kann aber zugleich den stählernen Ofenmantel oder ein Segment daraus bilden.

   Soweit es erforderlich oder zweckmässig ist, die Kühlvorrichtung mit Ankern zu versehen, die in an sich bekannter Weise dazu dienen, aufzubringendes Feuerfestmaterial und/oder im Ofenraum sich absetzende Schlacke festzuhalten, lehrt die Erfindung, diese Anker nicht mit den Kühlrohren bzw. den Kappen zu verbinden, sondern vielmehr das Abdeckblech mit solchen Ankern zu versehen, die den Abstandszwischenraum durchfassen. Sie lassen sich ohne weiteres auf das Abdeckblech aufschweissen. Arbeitet man mit solchen Ankern, so können diese zugleich als Halter für die Kühlrohre und/oder Kappen und damit für das beschriebene Rohraggregat insgesamt ausgebildet sein. Zum Beispiel kann man entsprechende Anker über die Kühlrohre oder unter den Kappen umbiegen. 



   Die erreichten Vorteile sind darin zu sehen, dass bei der erfindungsgemässen Kühlvorrichtung den Abstandszwischenraum zwischen benachbarten Kühlrohren überbrückende Flacheisen oder Stege nicht mehr erforderlich sind. Damit entfallen auch die entsprechenden Schweissnähte, die bei 

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   The invention relates generally to a cooling device for wall structures and / or lid structures of industrial furnaces, in particular electric arc furnaces, with a
A plurality of cooling tubes which are arranged next to one another and with a spacing from one another and which have deflection elements welded on their ends and are thus combined to form a serpentine (in other words meandering) coolant flow channel.



   In the generic embodiment known from practice, the intermediate space is bridged by flat bars or webs, which are arranged between adjacent cooling tubes, with respect to the interior mostly outside, and are welded to the cooling tubes.



   These flat bars or webs are mainly required to give the unit the structurally required structural strength and stability. However, the known embodiment is not free from disadvantages. Different thermal expansions between the cooling pipes and the
Flat bars or bars as well as temperature changes cause premature destruction and crack formation in the area of the weld seams. One also observes in the area of the weld seams
Stress corrosion. Since the individual cooling pipes are arranged with a space between them, the deflection elements are semicircular pipe bends, the radius of curvature being adapted to the distance between the cooling pipes. This requires a considerable amount of welding work, because both pipe bend ends have to be welded to the connected cooling pipes with circumferential welding.



   The invention has for its object to further develop a generic cooling device so that flat iron or webs between the adjacent cooling tubes are no longer required and consequently the premature destruction in the area of the welds between the cooling tubes and webs or flat iron no longer occur.



   To achieve this object, the invention teaches that the cooling tubes have, at their ends connected to the deflecting elements, widenings which abut one another, define the spacing and are welded to one another at their contact surfaces, and that caps are welded onto the welded ends of the cooling tubes as deflecting elements and the cooling tubes of the cooling device are combined by the caps to form a self-supporting unit.



   The invention is based on the knowledge that, in the cooling device according to the invention, on the one hand the caps and on the other hand the cooling tubes with their widenings represent components or designs which have a large area moment of inertia and consequently give the unit the required structural strength and stability as well as the property as self-supporting Unit can be used. Because of the widening of the ends of the cooling tubes, there is the possibility, without impairing the flow cross-sections, of equipping the caps with a wall thickness that is greater than that of the cooling tubes.



   The cooling device according to the invention can be installed directly in an industrial furnace. However, there is also the possibility of arranging on the side facing away from the furnace space of the assigned industrial furnace a cover plate serving as an assembly aid and / or furnace wall - without a welded connection to the cooling tubes and / or caps. If this cover plate serves as an assembly aid, it allows the cooling device to be installed in a simple manner. The mounting plate can also form the steel furnace jacket or a segment from it.

   Insofar as it is necessary or expedient to provide the cooling device with anchors which, in a manner known per se, serve to hold refractory material to be applied and / or slag which settles in the furnace space, the invention teaches not to anchor these anchors with the cooling pipes or the caps connect, but rather to provide the cover plate with such anchors that cover the space between them. They can be easily welded onto the cover plate. If you work with such anchors, they can also be designed as a holder for the cooling tubes and / or caps and thus for the tube assembly described as a whole. For example, you can bend corresponding anchors over the cooling pipes or under the caps.



   The advantages achieved can be seen in the fact that, in the cooling device according to the invention, flat bars or webs bridging the gap between adjacent cooling tubes are no longer required. This also eliminates the corresponding welds, which at

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Claims (1)

<Desc/Clms Page number 3>  <Desc / Clms Page number 3>   4. Kühlvorrichtung nach Anspruch 3, daduch gekennzeichnet, dass das Abdeckblech (8) mit Ankern (9) für aufzubringendes Feuerfestmaterial und/oder festzuhaltende Schlacke versehen ist, die den Abstandszwischenraum (5) durchfassen.  4. Cooling device according to claim 3, characterized in that the cover plate (8) is provided with anchors (9) for refractory material to be applied and / or slag to be held, which cover the spacing space (5). 5. Kühlvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Anker (9) zugleich als Halter für die Kühlrohre (1) und/oder Kappen (2) ausgebildet, z. B. umgebogen sind.  5. Cooling device according to claim 4, characterized in that the armature (9) at the same time designed as a holder for the cooling tubes (1) and / or caps (2), for. B. are bent.
AT166282A 1982-04-29 1982-04-29 COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS AT377602B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT166282A AT377602B (en) 1982-04-29 1982-04-29 COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT166282A AT377602B (en) 1982-04-29 1982-04-29 COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS

Publications (2)

Publication Number Publication Date
ATA166282A ATA166282A (en) 1984-08-15
AT377602B true AT377602B (en) 1985-04-10

Family

ID=3518267

Family Applications (1)

Application Number Title Priority Date Filing Date
AT166282A AT377602B (en) 1982-04-29 1982-04-29 COOLING DEVICE FOR WALL CONSTRUCTIONS AND / OR LID CONSTRUCTIONS OF INDUSTRIAL OVENS, ESPECIALLY ELECTRIC ARC OVENS

Country Status (1)

Country Link
AT (1) AT377602B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854306A1 (en) * 1977-12-19 1979-06-21 Sidepal Sa COOLED ARC FURNACE COAT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854306A1 (en) * 1977-12-19 1979-06-21 Sidepal Sa COOLED ARC FURNACE COAT

Also Published As

Publication number Publication date
ATA166282A (en) 1984-08-15

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Legal Events

Date Code Title Description
EIH Change in the person of patent owner
EIH Change in the person of patent owner
ELJ Ceased due to non-payment of the annual fee
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties