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EP0536521B1 - Four à longerons mobiles - Google Patents

Four à longerons mobiles Download PDF

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Publication number
EP0536521B1
EP0536521B1 EP19920114498 EP92114498A EP0536521B1 EP 0536521 B1 EP0536521 B1 EP 0536521B1 EP 19920114498 EP19920114498 EP 19920114498 EP 92114498 A EP92114498 A EP 92114498A EP 0536521 B1 EP0536521 B1 EP 0536521B1
Authority
EP
European Patent Office
Prior art keywords
bearer
ribs
walking beam
longitudinal
walking
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 - Lifetime
Application number
EP19920114498
Other languages
German (de)
English (en)
Other versions
EP0536521A1 (fr
Inventor
Corrado Ballabene
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.)
Techint Compagnia Tecnica Internazionale SpA
Original Assignee
Techint Compagnia Tecnica Internazionale SpA
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Publication date
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Publication of EP0536521A1 publication Critical patent/EP0536521A1/fr
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Publication of EP0536521B1 publication Critical patent/EP0536521B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/022—Skids
    • F27D3/024—Details of skids, e.g. riders
    • 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
    • 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 walking beam furnace

Definitions

  • the invention relates to a walking beam furnace, according to the preamble of claim 1.
  • Walking beam furnaces and pacemaker furnaces have long been known for conveying annealing material, in particular slabs during annealing. They are preferred for use in rolling mills because they heat up more evenly and transport the annealing material without causing damage, e.g. Ensure pusher furnaces.
  • the annealing material When transported through the furnace, the annealing material is deposited on the fixed beam for a few minutes after each stroke. On the one hand, these transport breaks enable the annealing material to remain in the furnace for a sufficient time, and on the other hand, the lifting beams can return to their lowered starting position. Since also at high furnace temperature, the shape and the load-bearing capacity of the lifting and fixed beams must be maintained, they usually consist of pipes through which coolants flow. When the annealing material rests on the cooled fixed beam, however, temperature differences of up to 150 ° C, so-called cooling shadows, occur at the contact points of the annealing material.
  • Differences in temperature of the annealing material affect the Surface quality, the dimensional accuracy and the technological properties of the annealing material, so that the rolling mill strives to reduce the inevitable temperature differences in the annealing material to below 30 ° C.
  • German Offenlegungsschrift 34 40 126 describes a continuous furnace in which the beam sections essentially having a common longitudinal axis alternately consist of fixed beam sections and walking beam sections, and the fixed beam sections following the first fixed beam section are angled laterally at their ends facing the beginning of the furnace and are guided past the adjacent walking beam sections are.
  • This known walking beam has proven itself, but still results in cooling shadows which should be reduced as much as possible in the case of particularly high demands on the quality of the finished product produced from the annealing material.
  • a similarly designed walking beam furnace is described in French Offenlegungsschrift 2,569,262.
  • the fixed beams and the walking beams are arranged at equal distances from one another, the fixed beams and the walking beams in the middle of the furnace having essentially the same transverse displacement, which corresponds to a quarter of the space between two fixed beams or two walking beams.
  • the fixed beams are supported with supports on the furnace floor, while supports for the walking beams extend through openings in the furnace floor and are arranged on a common travel frame.
  • the annealing material rests on pins arranged on the top of the walking beams and the fixed beams.
  • the PCT published patent application WO 86/01884 describes a support system for supporting heat that is conveyed through a heating furnace, which consists of a supporting tube running in the conveying direction and fitted with this, optionally arranged at a distance one behind the other in the conveying direction, on the top of which there are support surfaces for the heat material.
  • a heating furnace which consists of a supporting tube running in the conveying direction and fitted with this, optionally arranged at a distance one behind the other in the conveying direction, on the top of which there are support surfaces for the heat material.
  • the riders are placed on the support tube, the support surfaces of which support the heat material are arranged alternately to the left and right of a central plane of the support system.
  • the contact surfaces of the riders arranged one behind the other on the support tube are of such a width and arrangement that they mutually release at least fifty percent of the surfaces of the material in contact with them for heating.
  • an attachment piece for coolant-carrying tubes in heating ovens which are provided with at least one locking element directly or indirectly connected to the support tube and with a recess for receiving the locking element, in which the recess or with the recess the receiving part of the locking element connected further recess of the attachment piece is shaped such that a part of the locking element received in the attachment piece is accessible from outside the attachment piece in such a way that the locking element is weldable at the access point with the support tube or a web-shaped intermediate piece to the support tube .
  • the invention has for its object to provide an improved walking beam furnace, in which there are changing support points of the annealing material on the individual lifting and fixed beams in the feed direction, without it being necessary to change the dimensions of the fixed beams and the walking beams and their distances, in order not to have to accept the limitations of the annealing material dimensions to be charged.
  • the lifting and fixed beams should be designed so that they can easily absorb the high weight of the annealing material, whereby support bars that can be placed on the lifting and fixed beams can be replaced without having to use any tools, but should be secured against falling.
  • a walking beam furnace of the type mentioned initially has a central support foot on each support web and a support foot at an end area with the support web at a slightly inclined position, extensions that can be pushed under the locking projections, with the longitudinal web in the area of a central support foot and / or a support foot on an end region, lateral projections in the region of the support foot or projections, which prevent longitudinal displacement after the lowering of the supporting web, and that the supporting webs placed on the longitudinal webs run at an angle to the longitudinal axis of the tubes.
  • the longitudinal webs thus serve to hold the supporting webs, which are secured by the projections under the locking projections. While the locking projections are intended to prevent the supporting webs from falling or tipping over from the longitudinal webs, the further projections serve to prevent longitudinal displacement.
  • the supporting webs can therefore be placed in a simple manner on the lifting or fixed beams by first placing and displacing a somewhat inclined supporting web with a support foot at one end region such that this support foot engages under the corresponding locking projections, after which the inclined supporting web is lowered is so that the central support foot and / or a support foot at the other end region in the longitudinal direction is enclosed on both sides by the projections preventing the longitudinal displacement.
  • a plurality of successive supporting webs can preferably be fastened on a walking beam and / or fixed beam, so that there is a relatively large angle for the supporting webs and thus the support points change to a sufficiently large extent with each step.
  • Successive supporting webs can take the same angle to the longitudinal axis and adjacent ends of the supporting webs can be offset with respect to one another in the longitudinal axis.
  • successive supporting webs can assume the same or different, oppositely directed angles to the longitudinal axis and adjoin adjacent ends of the supporting webs.
  • both the walking beam and the fixed beam can be divided into sections in the feed direction and the walking beam and the longitudinal axis Alternate fixed beam sections.
  • This arrangement allows the support points to be moved in addition to the walking achieved by the sloping supporting webs, whereby by alternating the walking beam and fixed beam sections, relatively large distances between the cooling shadows can be achieved, which in addition are the smaller values that result from the result in inclined supporting webs, to move back and forth.
  • each supporting web consists of a straight part which connects the supporting feet and rests on the corresponding longitudinal web and a part which projects vertically from it, in each case obliquely from one supporting foot side at one end to the other support foot side at the other end extending support part. In this way, the supporting web is given considerable structural strength, which can carry high loads with little material.
  • each support part consists of end regions parallel to the longitudinal web in the region of the end support feet and an oblique intermediate region connecting these end regions.
  • Another measure for reducing the temperature differences in the area of the cooling shadows contributes to the fact that the lifting and fixed beams or sections have a highly heat-resistant insulation that only leaves the upper area of the supporting webs free.
  • a walking beam furnace 1 essentially consists of a fire-proof housing 2 with ceiling and side burners 3.
  • Continuous fixed beams 4 and continuous lifting beams 5 are shown in the upper half of FIG. 1. Both are supported by uprights (not shown) on the oven floor. With regard to these details and the drive of the walking beam 4, reference is made to German Offenlegungsschrift 34 40 126.
  • Fixed and walking beams are shown in the lower half of FIG. 1, which are divided into fixed beam sections 6 to 9 and walking beam sections 10 to 13. These sections 6 to 9 and 10 to 13 become shorter towards the end of the furnace, so that the points of contact change more frequently in the direction of transport.
  • the fixed beam sections 7, 8, 9 following the first fixed beam section 6 are cranked on one side, so that their end facing the beginning of the furnace passes laterally past the adjacent walking beam sections 10, 11, 12 and so the freedom of movement of the walking beam sections 10 to 13 and the full load capacity of the fixed beam sections 6 to 9 is guaranteed.
  • the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 alternate with each other in the feed direction in the longitudinal axis.
  • the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 are alternately arranged in the longitudinal axis, an additional compensation of the temperature difference is achieved, since the annealing material rests on the walking beam sections 10 to 13 only during transport, on the fixed beam sections 6 to 9 lingers for a long time.
  • the angle of the supporting webs 14 to the longitudinal axis can be the same and equally directed, it may be necessary for structural reasons in the arrangement of the supporting webs 14 on the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 provide some consecutive support webs 14 the same or different, but opposite angle to the longitudinal axis, so that adjacent ends of the support webs 14 in this Bump area together.
  • the fixed beams 4, the walking beams 5 and the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 consist of horizontal, cooled tubes 15, on the upper side of which an axial longitudinal web 16 is welded.
  • This axial longitudinal web 16 serves as a holder for the supporting webs 14.
  • Latching projections 17, 18 are welded to the axial longitudinal webs 16 at regular intervals.
  • the supporting webs 14 have support feet 19, 21 in the end regions and a further support foot 20 approximately in the center. These support feet 19 to 21 overlap the longitudinal web 16, the support foot 19 having lower, lateral extensions 22 which engage under the locking projections 17.
  • the locking projections 18 are arranged in the region of the central support foot 20 and are in each case on opposite sides of this support foot 20.
  • the locking projections 17 serve to prevent lifting of the support web 14 from the longitudinal web 16, while the locking projections 18 block a longitudinal displacement of the support web 14.
  • a support web 14 can be placed obliquely with its support foot 19 over the longitudinal web 16 such that it engages over it and can be moved axially until the lateral locking projections 17 are gripped by the extensions 22. If the support web 14 is now completely lowered onto the longitudinal web 16, the support foot 20 reaches the area between the locking projections 18 and is thereby axially fixed. The supporting web 14 is now secured against axial displacement as well as against falling and tipping over from the longitudinal web 16.
  • Each support web 14 has a straight part 23 resting on the longitudinal web 16, which connects the support feet 19, 20, 21 to one another.
  • the end regions 25, 26 and the intermediate region 27 form the support part 24 on the support web 14.
  • the distance between the end region 25 and the end region 26 is approximately in the order of magnitude of the diameter of the cooled tube 15, so that due to the oblique course of the supporting part 24 of the supporting webs 14 there is no increase in the dimensions of the fixed beams 4 and walking beams 5 or 5 the fixed beam sections 6 to 9 and walking beam sections 10 to 13 enter.
  • the cooling tube 15 can be coated with a highly heat-resistant insulation 28, from which only the supporting part 24 of the supporting webs 14 protrudes, so that the tubes 15 are not excessively heated and the annealing material is cooled only in the area of the bearing surface on the supporting parts 24. This also helps to reduce the temperature difference in the cooling shadow of the annealing material.

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

Claims (10)

  1. Four à longerons mobiles présentant des longerons fixes refroidis (4, 6, 7, 8, 9) formant des tubes (15) avec leurs axes longitudinaux parallèles au dispositif d'avancement, des longerons mobiles refroidis (5, 10, 11, 12, 13) formant des tubes (15) avec leurs axes longitudinaux parallèles au dispositif d'avancement et aux longerons fixes, des nervures longitudinales (16) soudées sur la partie supérieure des tubes (15), avec des saillies d'arrêt latérales (17, 18) sur les nervures longitudinales, des nervures de support (14) placées sur les nervures longitudinales ainsi que des pieds d'appui (19, 20, 21) disposés aux extrémités des nervures de support (14), débordant de la nervure longitudinale (16), caractérisé en ce que chaque nervure de support (14) présente un pied d'appui central (20) et qu'un pied d'appui (19) présente, sur une extrémité, en cas de légère inclinaison de la nervure de support (14), des prolongements (22) pouvant être poussés sous les saillies d'arrêt (17), des saillies (18) empêchant un déplacement longitudinal après abaissement de la nervure de support (14) étant disposées sur la nervure longitudinale (16), dans la région d'un pied central d'appui (20) et/ou d'un pied d'appui (19, 21), en étant latérales à l'extrémité et saillantes dans la région de la ou des surfaces d'appui (19, 21) et en ce que les nervures de support (14) disposées sur les nervures longitudinales (16) s'étendent en formant un angle par rapport à l'axe longitudinal des tubes (15).
  2. Four à longerons mobiles selon la revendication 1, caractérisé en ce que chaque nervure de support (14) présente des pieds d'appui (19, 20, 21) débordant des nervures longitudinales (16) aux extrémités et au milieu.
  3. Four à longerons mobiles selon la revendication 1 ou 2, caractérisé en ce que chaque nervure de support (14) est composée d'une pièce (23) droite reposant sur la nervure longitudinale correspondante (16) reliant les pieds d'appui (19, 20, 21), et d'une pièce porteuse (24) perpendiculairement saillante par rapport à la pièce (23) et s'étendant de manière inclinée d'un côté du pied d'appui, à une extrémité, vers l'autre côté du pied d'appui, à l'autre extrémité.
  4. Four à longerons mobiles selon la revendication 3, caractérisé en ce que chaque pièce porteuse (24) est composée de parties finales (25, 26) parallèles à la nervure longitudinale au niveau de la partie latérale des pieds d'appui (19, 21), et d'une partie intermédiaire (27) s'étendant de manière inclinée et reliant ces parties finales (27).
  5. Four à longerons mobiles selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que plusieurs nervures de support consécutives (14) sont fixées sur un longeron mobile (5, 10, 11, 12, 13) et/ou sur un longeron fixe (4, 6, 7, 8, 9).
  6. Four à longerons mobiles selon la revendication 5, caractérisé en ce que les nervures de support consécutives (14) ont le même angle par rapport à l'axe longitudinal et que les extrémités adjacentes des nervures de support (14) sont décalées les unes par rapport aux autres dans l'axe longitudinal.
  7. Four à longerons mobiles selon la revendication 5, caractérisé en ce que les nervures de support consécutives (14) font le même angle, mais opposé, avec l'axe longitudinal, et que les extrémités adjacentes des nervures de support sont contiguës.
  8. Four à longerons mobiles selon une ou plusieurs des revendications 1 à 7, caractérisé en ce que les longerons mobiles, aussi bien que les longerons fixes, sont, dans le sens du déplacement, divisés en sections (6, 7, 8, 9, 10, 11, 12, 13) et que les sections de longerons mobiles et les sections de longerons fixes alternent dans l'axe longitudinal.
  9. Four à longerons mobiles selon une ou plusieurs des revendications 1 à 8, caractérisé en ce que plusieurs nervures de support consécutives (14) sont disposées sur une section de longerons mobiles et/ou de longerons fixes (6, 7, 8, 9; 10, 11, 12, 13).
  10. Four à longerons mobiles selon une ou plusieurs des revendications 1 à 9, caractérisé en ce que les longerons mobiles et les longerons fixes (4, 5; 6, 7, 8, 9; 10, 11, 12, 13) et la pièce (23) présentent une isolation (27) résistante aux températures élevées, ne laissant libre que la partie supérieure des nervures de support (14).
EP19920114498 1991-10-11 1992-08-26 Four à longerons mobiles Expired - Lifetime EP0536521B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4133698 1991-10-11
DE19914133698 DE4133698A1 (de) 1991-10-11 1991-10-11 Hubbalkenofen

Publications (2)

Publication Number Publication Date
EP0536521A1 EP0536521A1 (fr) 1993-04-14
EP0536521B1 true EP0536521B1 (fr) 1997-07-23

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ID=6442495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920114498 Expired - Lifetime EP0536521B1 (fr) 1991-10-11 1992-08-26 Four à longerons mobiles

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EP (1) EP0536521B1 (fr)
CA (1) CA2077137A1 (fr)
DE (1) DE4133698A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343675A1 (de) * 1993-12-21 1995-06-22 Italimpianti Deutschland Gmbh Hubbalkenofen
DE19504633A1 (de) 1994-08-19 1996-02-22 Macgregor Conver Gmbh Kuppelstück zur lösbaren Verbindung von Containern
DE102018129446B4 (de) 2018-11-22 2024-03-14 Saint-Gobain Industriekeramik Rödental GmbH Balken für Balkenförderofen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR585475A (fr) * 1924-09-06 1925-03-02 Friedrich Siemens A G Rail de glissement à refroidissement d'eau pour fours à réchauffer
FR2569262B1 (fr) * 1984-08-17 1987-04-17 Stein Heurtey Four a longerons mobiles pour le rechauffage de produits siderurgiques
DE3434356C2 (de) * 1984-09-19 1986-01-23 Engels, Paul, 4030 Ratingen Aufsatzstücke für gekühlte Tragrohre in Erwärmungsöfen
DE3440126C2 (de) * 1984-11-02 1993-11-18 Italimpianti Deutschland Gmbh Hubbalkenofen
DE8901064U1 (de) * 1989-02-01 1989-04-20 Reining Heisskühlung GmbH & Co. KG, 4330 Mülheim Aufsatzstück für kühlmitteldurchströmte Tragrohre in Wärmeöfen, insbesondere Hubbalkenöfen

Also Published As

Publication number Publication date
CA2077137A1 (fr) 1993-04-12
EP0536521A1 (fr) 1993-04-14
DE4133698A1 (de) 1993-04-15

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