EP0660061A1 - Four à longerons mobiles - Google Patents

Four à longerons mobiles Download PDF

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Publication number
EP0660061A1
EP0660061A1 EP94120220A EP94120220A EP0660061A1 EP 0660061 A1 EP0660061 A1 EP 0660061A1 EP 94120220 A EP94120220 A EP 94120220A EP 94120220 A EP94120220 A EP 94120220A EP 0660061 A1 EP0660061 A1 EP 0660061A1
Authority
EP
European Patent Office
Prior art keywords
walking beam
furnace according
beam furnace
support
fixed
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.)
Granted
Application number
EP94120220A
Other languages
German (de)
English (en)
Other versions
EP0660061B1 (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 ITALIMPIANTI DEUTSCHLAND GmbH
Original Assignee
ITALIMPIANTI DEUTSCHLAND GmbH
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 ITALIMPIANTI DEUTSCHLAND GmbH filed Critical ITALIMPIANTI DEUTSCHLAND GmbH
Publication of EP0660061A1 publication Critical patent/EP0660061A1/fr
Application granted granted Critical
Publication of EP0660061B1 publication Critical patent/EP0660061B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a walking beam furnace with fixed and walking beams.
  • Walking beam furnaces and pacemaker furnaces are preferably used to convey annealing material through furnaces, in particular slabs and blanks, during annealing, since they ensure more uniform heating and damage-free transport of the annealing material than, for example, push furnaces.
  • the lifting and fixed beams mostly consist of pipes through which coolant flows.
  • temperature differences of up to about 150 ° C. occur at the points of contact of the annealing material, so-called cooling shadows. These affect the surface quality Dimensional accuracy and the technological properties of the annealing material. The aim is therefore to achieve a substantial reduction in the temperature differences in the annealing material which are inevitable.
  • German patent application 20 33 538 a slide rail for walking beam furnaces is described, which consists of several rail pieces individually welded to a cooling tube, which alternately run to the right and left laterally offset to the vertical longitudinal center plane of the tube.
  • a special shape of the tube is intended to increase the reduction in heat radiation from the annealing material.
  • German layout specification 20 39 507 describes attachment pieces which are inserted obliquely or off-center in receptacles of a frame welded to cooled support tubes or a holding strip and are secured by means of locking pieces against longitudinal displacement on the tubes.
  • German Offenlegungsschrift 41 33 698 relates to a walking beam furnace with several supporting webs arranged on walking and / or fixed beams. With a view to changing the support points on the annealing material, the supporting webs run obliquely across the width of the lifting or fixed beams and are latched onto an axial longitudinal web welded onto the top of the tube.
  • a major disadvantage of the welded beam constructions is the high cost of attaching the support pieces.
  • the cooled pipes are also standing Due to the high temperature differences between the cooled pipe wall and the welded on brackets, webs and rails exposed to the hot furnace atmosphere under mechanical stress and are therefore at risk of cracking.
  • the invention is based on the problem of equipping a walking beam furnace the lifting and / or fixed beams with supports for the annealing material in such a way that the tubes are less susceptible to stress cracks.
  • the solution to this problem consists in a walking beam furnace, on the respectively cooled lifting beam and / or fixed beam of which short fastening pieces for supporting webs are arranged.
  • the supporting webs can be fixed by bores at their outer ends, for example on eyelets, at an equal angle to the longitudinal axis.
  • Several supporting webs can also be arranged on a beam.
  • the supporting webs can also be arranged on alternating lifting and fixed beams which are divided into sections in the feed direction.
  • the lifting and fixed beams or the lifting and fixed beam sections consist of cooled pipes on the outside preferably eyelets, normally welded on the left and right in the transport direction at regular intervals, for example opposite one another.
  • Each support web advantageously consists of a base adapted to the tube circumference and a support, for example of an end piece running in the feed direction and an adjoining main piece which preferably runs obliquely to the center of the other support web end.
  • each support web There may be holes for the plug pins at the outer ends of each support web.
  • the supporting webs preferably have depressions which serve to insert and countersink the fastening bolts into the bores.
  • the indentations can be provided with locking projections in order to engage the fastening bolts.
  • each supporting web is connected to the two adjacent supporting webs by at least one plug pin running through an eyelet.
  • the walking beam furnace 1 has a range 2 of fixed beams 4 and walking beams 5 running in the feed direction 3, which are divided into sections 6, 7.
  • the fixed beam sections 6 and the walking beam sections 7 become shorter towards the end of the furnace in order to achieve frequent changing of the support points on the annealing material.
  • the fixed and the walking beam sections 6, 7 supporting webs 8 are arranged, which run at the same angle to the longitudinal axis.
  • the fixed and the walking beam sections 6, 7 consist of cooled tubes 9, on which eyelets 10 are welded at regular intervals on the left and right of a vertical plane running through the tube axis.
  • the supporting webs 8 have holes 11 for plug bolts 12 at their outer ends.
  • a bore 11 belongs to each depression 13.
  • the supporting webs 8 can be placed on the tube 9 between the eyelets 10.
  • One plug pin 12 each is placed in the depressions 13, pushed through the associated bore 11 and the relevant eyelet 10 into the bore 11 of the adjacent supporting web 8 and locked in the recess 13 by the locking projection 14.
  • each support web 8 is connected to the adjacent support web 8 by means of two socket pins 12 and to the adjacent support webs 8 by means of a socket pin 12, and is simultaneously held on the cooling tube by means of the eyelets 10.
  • Each support web 8 has a foot 15 which is curved approximately in the width of the fixed and walking beam sections 6, 7 in accordance with the pipe circumference and which is supported on the pipe 9.
  • the supporting webs 8 consist of end piece 17 running parallel to the pipe axis and a main piece 18 running obliquely to the pipe axis, which ends in the middle of the other end of the supporting web 8 or the adjacent supporting web.
  • the end piece 17 and the main piece 18 form a support 16 for the annealing material.
  • the supporting webs 8 are arranged in such a way that two main pieces 18 each lie on a straight line and complement each other so that, seen in plan view, they run diagonally across the tube 9.
  • the cooling tube 9 is sheathed with a highly heat-resistant insulation 19, from which only the support 16 of the supporting webs 8 protrudes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Reciprocating Conveyors (AREA)
EP94120220A 1993-12-21 1994-12-20 Four à longerons mobiles Expired - Lifetime EP0660061B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343675A DE4343675A1 (de) 1993-12-21 1993-12-21 Hubbalkenofen
DE4343675 1993-12-21

Publications (2)

Publication Number Publication Date
EP0660061A1 true EP0660061A1 (fr) 1995-06-28
EP0660061B1 EP0660061B1 (fr) 1999-03-10

Family

ID=6505665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120220A Expired - Lifetime EP0660061B1 (fr) 1993-12-21 1994-12-20 Four à longerons mobiles

Country Status (3)

Country Link
EP (1) EP0660061B1 (fr)
AT (1) ATE177526T1 (fr)
DE (1) DE4343675A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710870A1 (de) * 1997-03-15 1998-09-17 Techint Italimpianti Deutschla Hubbalkenofen
AT409670B (de) 2001-01-15 2002-10-25 Hertwich Engineering Gmbh Hubbalkenförderer für einen durchlaufofen zum erwärmen von aluminiumbarren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039508A1 (de) * 1970-08-08 1972-02-10 Huettenwerk Oberhausen Ag Stossofen
FR2297390A1 (fr) * 1975-01-11 1976-08-06 Krupp Ag Huettenwerke Tube porteur pour des fours poussants ou fours a longerons mobiles
WO1986001884A1 (fr) * 1984-09-19 1986-03-27 Ruhrgas Aktiengesellschaft Systeme porteur et supports pour produits chauffees
EP0536521A1 (fr) * 1991-10-11 1993-04-14 IRITECNA Società per l'Impiantistica Industriale e l'Assetto del Territorio per Azioni Four à longerons mobiles
DE4203595A1 (de) * 1992-02-10 1993-08-12 Loi Ind Ofenanlagen Vorrichtung zum abstuetzen von einsatzgut in einem erwaermungsofen
EP0609649A1 (fr) * 1993-02-03 1994-08-10 IRITECNA Società per l'Impiantistica Industriale e l'Assetto del Territorio per Azioni Four à longerons mobiles pour le chauffage accéléré de billettes ou d'autres produits similaires

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039508A1 (de) * 1970-08-08 1972-02-10 Huettenwerk Oberhausen Ag Stossofen
FR2297390A1 (fr) * 1975-01-11 1976-08-06 Krupp Ag Huettenwerke Tube porteur pour des fours poussants ou fours a longerons mobiles
WO1986001884A1 (fr) * 1984-09-19 1986-03-27 Ruhrgas Aktiengesellschaft Systeme porteur et supports pour produits chauffees
EP0536521A1 (fr) * 1991-10-11 1993-04-14 IRITECNA Società per l'Impiantistica Industriale e l'Assetto del Territorio per Azioni Four à longerons mobiles
DE4133698A1 (de) * 1991-10-11 1993-04-15 Italimpianti Deutschland Gmbh Hubbalkenofen
DE4203595A1 (de) * 1992-02-10 1993-08-12 Loi Ind Ofenanlagen Vorrichtung zum abstuetzen von einsatzgut in einem erwaermungsofen
EP0609649A1 (fr) * 1993-02-03 1994-08-10 IRITECNA Società per l'Impiantistica Industriale e l'Assetto del Territorio per Azioni Four à longerons mobiles pour le chauffage accéléré de billettes ou d'autres produits similaires

Also Published As

Publication number Publication date
EP0660061B1 (fr) 1999-03-10
DE4343675A1 (de) 1995-06-22
ATE177526T1 (de) 1999-03-15

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