EP0203339B1 - Dispositif pour soulever et faire pivoter le couvercle d'un four à arc - Google Patents

Dispositif pour soulever et faire pivoter le couvercle d'un four à arc Download PDF

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Publication number
EP0203339B1
EP0203339B1 EP86105214A EP86105214A EP0203339B1 EP 0203339 B1 EP0203339 B1 EP 0203339B1 EP 86105214 A EP86105214 A EP 86105214A EP 86105214 A EP86105214 A EP 86105214A EP 0203339 B1 EP0203339 B1 EP 0203339B1
Authority
EP
European Patent Office
Prior art keywords
cover
lifting
pivot axis
carrier member
edge
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
EP86105214A
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German (de)
English (en)
Other versions
EP0203339A3 (en
EP0203339A2 (fr
Inventor
Joachim Dipl.-Ing. Ehle
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.)
Primetals Technologies Germany GmbH
Original Assignee
Fuchs Systemtechnik 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6268680&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0203339(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fuchs Systemtechnik GmbH filed Critical Fuchs Systemtechnik GmbH
Publication of EP0203339A2 publication Critical patent/EP0203339A2/fr
Publication of EP0203339A3 publication Critical patent/EP0203339A3/de
Application granted granted Critical
Publication of EP0203339B1 publication Critical patent/EP0203339B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F27B3/16—Walls; Roofs
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • F27D11/10—Disposition of electrodes

Definitions

  • the invention relates to a lifting and swiveling device for the lid of the furnace vessel which is arranged on the side of the furnace vessel of an arc furnace and which contains a lifting and lowering support member which engages on the edge of the lid.
  • a lid support structure is usually provided, which is supported on a rotating portal supporting the lifting columns of the electrode support arms of the electric arc furnace and contains two projecting support arms which extend to the cover on both sides of the electrode support arms and by 4 or sometimes 3 bolts with the Lid are connected.
  • the lids or at least parts of the lids of arc furnaces have been designed as water-cooled elements and, since these elements are electrically conductive, there is the problem of adequate electrical insulation of the lid from the lid structure, if this is connected to the lid during furnace operation. If elements of the lid, such as the particularly stressed center piece, or the entire lid are to be replaced, this requires the lifting and swiveling device or the lid support to be released from the lid, which is not only time-consuming but also for the workers concerned because of the high level Temperatures near the lid is also arduous and dangerous.
  • the invention has for its object to ensure good electrical insulation of this device with respect to the furnace cover and to prevent undesirable leakage currents between the cover and this device in a lifting and swiveling device of the type mentioned in the preamble of claim 1 without great design effort. Furthermore, the replacement of the lid or parts of the lid is to be simplified and the time required for this is to be shortened. The exchange process should be able to be carried out without workers having to go into the immediate vicinity of the furnace vessel to solve the connection between the lifting and swiveling device and the lid.
  • the arc furnace 1 shown in FIGS. 1 and 2 contains a furnace vessel 2 with water-cooled walls, as described for example in DE-OS 28 24 821.
  • a lid 4 On an upper water-bearing ring 3 of this furnace vessel, the edge of a lid 4, which, as indicated in FIG. 2, has a water-cooled outer support ring 5 for water-cooled elements arranged within this support ring.
  • two claws 13 and 14 which can be pivoted about a horizontal pivot axis 12 are provided as the lifting and pivoting device for the furnace cover 4, which in the lowered position shown in dash-dotted lines in FIG. 1 - identified by 13 '- from the edge of the cover 4 are loosened and engage each time in the lifting eye 15 or 16 adapted to the shape of the swivel claws on the edge of the cover 4.
  • the lifting movement of the swiveling claws 13 and 14 is effected in the exemplary embodiment by hydraulically actuated linear drives 17 which are rotatably mounted in the swiveling claw 13 and 14 in question and on the platform of the portal 6.
  • the drives of the swivel claws 13 and 14 must be designed such that they are able to lift the lid 4 from the furnace vessel 2 after the swivel claws have engaged in the associated lifting eyes 15 and 16.
  • the corresponding position of the swivel claw 13 is also shown in dash-dotted lines in FIG. 1 and is designated by 13 ".
  • Each swivel claw contains a lower thrust bearing 18 on the side facing the cover 4 and a higher upper thrust bearing 19 on the side facing away from the cover. For reasons of clarity, the two thrust bearings are only marked when the swivel claw 13 'is lowered.
  • These Thrust bearings are in contact with the pivoting claws 13 and 14 in the associated lifting eyes 15 and 16 on adapted counter bearings 20 and 21 respectively.
  • the horizontal pivot axis 12 in an adjustable eccentric disk (not shown), or the thrust bearings 18/19 or the associated counter bearings 20/21 can be provided with interchangeable spacer plates (not shown).
  • the upper thrust bearing 19 and the associated counter bearing 21 are preferably designed as inclined surfaces which, in the engagement position of the pivotable claw shown by a solid line, with the cover 4 resting on the furnace vessel 2 at an angle of 5 ° to 20 ° are preferably inclined by 10 ° with respect to a vertical plane. This angle is indicated in Fig. 1 and designated a.
  • the horizontal swivel axis 12 is arranged at a height which is the height between the upper edge and lower edge of the lid 4 resting on the furnace vessel 2 corresponds.
  • the horizontal pivot axis 12 is preferably arranged at a height which corresponds to the height between the upper edge and lower edge of the electrode bushings in the cover 4, which are not shown in the figure. If the height of the swivel axis is at a height that corresponds to the center between the upper edge and lower edge of the electrode feedthroughs in the lid, then the horizontal displacement of the electrode feedthroughs when the lid is lifted is minimized.
  • the lifting eyes 15 and 16 are provided in the described embodiment in support arms 22 and 23 which are fixedly connected to the cover ring 5.
  • the two swiveling claws 13 and 14 are connected to one another to ensure a synchronous movement by a transverse shaft 29, which is preferably designed as a hollow shaft.
  • the cover 4 rests on the furnace vessel 2 and the swiveling claws 13 and 14 are in the lower position 13 'shown in dash-dotted lines. If the lid is to be lifted and pivoted to the side, the linear drives 17 of the two pivoting claws 13 and 14 are actuated and these are moved synchronously upwards into the engagement position shown in solid lines.
  • the swiveling claws 13 and 14 engage in the lifting eyes 15 and 16 and when the thrust bearings 18 and 19 and the associated counter bearings 20 and 21 are precisely adjusted, they come into mutual contact at the same time.
  • the cover 4 is raised about the swiveling axis 12 up to the position shown in broken lines.
  • the swivel claws are located above the water-cooled ring 3, i.e. above the upper edge of the furnace vessel 2 and can be swung freely to the side together with the lid.
  • This swiveling movement takes place by rotating the rotary portal 6 about the vertical swiveling axis 7.
  • the electrode arms are swiveled, which were previously raised to a position in which the swiveling movement of the electrodes is not impeded by the upper edge of the vessel.
  • the cover is swiveled back laterally by turning back the rotary portal 6 and lowering the cover 4 onto the furnace vessel 2 by actuating the linear drive 17 in the reverse direction after the mechanical locking has been eliminated. If the cover 4 or a part of the cover, such as a cooling element carried by the outer support ring 5, is to be replaced, the pivoting claws are pivoted to the side together with the electrode support arms in the lower, disengaged position 13 ′′ after the electrode support arms 10 have been raised by means of the rotary portal 6 The lid 4 lying on the furnace vessel is thus accessible from above and parts thereof or the entire lid can be lifted off and replaced with new parts.
  • a lifting ram 24 is provided as a lifting and lowering support member instead of the two swiveling claws 13 and 14.
  • the parts of the second exemplary embodiment which correspond to those of the first are provided with the same reference numerals and reference is made to the explanation given for the first exemplary embodiment of these parts.
  • the lifting ram 24 is fastened on the platform of the rotary portal 6, specifically, as can be seen in FIG. 4, on the side of the electrode support arms.
  • the cover 4 can be pivoted laterally into the position shown in dash-dotted lines in FIG. 4.
  • the lifting plunger can be secured against rotation with respect to the rotating portal, for example, by a vertical groove in the rotating portal into which a pin inserted laterally on the lifting plunger 24 engages.
  • the lifting plunger 24 is secured against rotation with respect to the cover 4 in the exemplary embodiment by a flattened portion 25 of the lifting die, which is approximately vertical and rests on a correspondingly designed counter surface in the area of the lifting eye.
  • the lifting ram 24 can be lowered from the engagement position shown into a release position releasing the cover and can also be raised from the position shown while taking the cover with it so that it can be swung freely to the side when the rotary portal is rotated.
  • the operation of the second game perennial corresponds to that of the first embodiment. Reference is made to the explanation given for this example.
  • the third exemplary embodiment according to FIGS. 5 and 6 differs from the second exemplary embodiment in that instead of one lifting ram 24 two lifting rams 26 and 27 are provided. So that a lateral pivoting of the cover 4 into the pivoted-out position indicated by the dashed line in FIG. 6 is possible without the pivoting movement being impeded, the vertical pivot axis 7 of the rotary portal 6 must lie outside the axis of symmetry 28 between the two lifting pistons 26 and 27 (see Fig. 6). The position is determined by the fact that the lifting ram 27 can be guided past the furnace vessel when the rotary portal is rotated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (15)

1. Dispositif de soulèvement et de basculement du couvercle (4) de la cuve (2) d'un four à arc électrique, qui est disposé sur le côté de la cuve et qui comporte un élément porteur (13, 14, 24, 26, 27) susceptible d'être soulevé et abaissé et attaquant directement le bord du couvercle au moins un dispositif de soulèvement étant fixé à un portique tournant (6) disposé à côté de la cuve du four et susceptible de basculer latéralement, et l'élément porteur (13, 14, 24, 26, 27) étant, en la position abaissée (13') séparé du bord du couvercle et pénétrant, lors du soulèvement, dans un oeillet de levage (15, 16) adapté à la forme du support.
2. Dispositif suivant la revendication 1, caractérisé en ce que, dans le cas de deux dispositifs de soulèvement, le portique tournant (6) qui est susceptible de basculer latéralement, peut basculer autour d'un axe de basculement vertical se trouvant à l'extérieur de l'axe de symétrie (28) entre les deux éléments porteurs (26, 27).
3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'élément porteur (13, 14, 24, 26, 27) comporte, du côté tourné vers le couvercle (4), un palier de butée inférieur (18) et, du côté éloigné du couvercle, un palier de butée supérieur (19) à un niveau plus élevé et les deux paliers de butée s'appliquent, sur des contre-paliers (20, 21) adaptés, lorsque l'élément porteur pénètre dans l'oeillet de levage (15, 16) associé du couvercle (4).
4. Dispositif suivant la revendication 3, caractérisé en ce que le palier de butée supérieur (19) et le contre-palier (21) associé, sont constitués en surfaces inclinées d'un angle (a) de 5 à 20° par rapport à un plan vertical, dans la position de pénétration de l'organe porteur et alors que le couvercle repose sur la cuve du four
5. Dispositif suivant l'une des revendications 1 à 4, caractérisé en ce que le portique tournant (6) porte au moins une colonne de soulèvement d'un bras porte-électrode (10) du four à arc électrique (1).
6. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce que l'élément porteur qui est susceptible d'être soulevé et abaissé est constitué sous la forme d'une patte (13, 14) qui peut basculer autour d'un axe de basculement (12) horizontal.
7. Dispositif suivant la revendication 6, caractérisé en ce que l'axe de basculement (12) horizontal est disposé à un niveau qui correspond au niveau compris entre le bord supérieur et le bord inférieur du couvercle (4) reposant sur la cuve du four (2).
8. Dispositif suivant la revendication 7, caractérisé en ce que l'axe de basculement (12) horizontal est disposé à un niveau qui correspond au niveau compris entre le bord supérieur et le bord inférieur de la traversée pour l'électrode ou des traversées pour les électrodes ménagées dans le couvercle (4).
9. Dispositif suivant l'une des revendications 6 à 8, caractérisé en ce que l'axe de basculement (12) horizontal peut, pour l'ajustement horizontal de la pénétration de la patte (13, 14) susceptible de basculer dans l'oeillet de levage (15, 16) du couvercle (4), être déplacé dans la direction du couvercle.
10. Dispositif suivant la revendication 9, caractérisé en ce que l'axe de basculement (12) horizontal est monté dans un disque à excentrique ajustable.
11. Dispositif suivant l'une des revendications 6 à 10, caractérisé en ce qu'il est prévu deux pattes basculantes (13, 14) qui sont à distance l'une de l'autre et qui, en vue d'être manoeuvrées en synchronisme, sont reliées rigidement l'une à l'autre par un arbre transversal (29).
12. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce que l'élément porteur qui est susceptible de se soulever et de s'abaisser est constitué en vérin de levage (24, 26, 27).
13. Dispositif suivant la revendication 12, caractérisé en ce que le vérin de levage (24) est bloqué en rotation par rapport au portique tournant (6) et par rapport au couvercle (4), lors de la pénétration dans l'oeillet de levage (15) associé.
14. Dispositif suivant l'une des revendications 1 à 13, caractérisé en ce que le couvercle est constitué en couvercle (4) à refroidissement par du liquide.
15. Dispositif suivant la revendication 14, caractérisé en ce que l'oeillet de levage est prévu dans un anneau support extérieur (5) du couvercle (4) à refroidissement par du liquide.
EP86105214A 1985-04-19 1986-04-15 Dispositif pour soulever et faire pivoter le couvercle d'un four à arc Expired EP0203339B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3514293 1985-04-19
DE19853514293 DE3514293A1 (de) 1985-04-19 1985-04-19 Hub- und schwenkvorrichtung fuer den deckel des ofengefaesses eines lichtbogenofens

Publications (3)

Publication Number Publication Date
EP0203339A2 EP0203339A2 (fr) 1986-12-03
EP0203339A3 EP0203339A3 (en) 1987-04-22
EP0203339B1 true EP0203339B1 (fr) 1989-09-20

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ID=6268680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105214A Expired EP0203339B1 (fr) 1985-04-19 1986-04-15 Dispositif pour soulever et faire pivoter le couvercle d'un four à arc

Country Status (2)

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EP (1) EP0203339B1 (fr)
DE (2) DE3514293A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008012280A1 (de) * 2008-03-03 2009-09-10 Fuchs Technology Ag Lichtbogenofen
DE102012001907A1 (de) * 2012-02-02 2013-08-08 Badische Stahl-Engineering Gmbh Kombiniertes Hub- und Schwenkwerk

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387455B (de) * 1987-05-15 1989-01-25 Voest Alpine Ag Elektroofen, wie lichtbogenofen oder plasmaofen
US5153894A (en) * 1989-03-02 1992-10-06 Fuchs Technology Ag Smelting plant with removable shaft-like charging material preheater
DE3906653A1 (de) 1989-03-02 1990-09-06 Fuchs Technology Ag Einschmelzaggregat mit schachtfoermigem chargiergutvorwaermer
DE3907129A1 (de) * 1989-03-06 1990-09-13 Fuchs Technology Ag Lichtbogenofen
AT401304B (de) * 1993-11-04 1996-08-26 Voest Alpine Ind Anlagen Deckelhubwerk für einen auf ein metallurgisches gefäss aufsetzbaren deckel
DE102006019481B4 (de) * 2006-04-26 2012-04-05 Fridolin Ohnemus Abdeckvorrichtung sowie Verfahren zum Montieren und Demontieren der Abdeckvorrichtung
DE102008028966A1 (de) * 2008-06-18 2009-12-24 Fuchs Technology Holding Ag Drehportal für einen Ofen
DE102010041694A1 (de) 2010-09-30 2012-04-05 Siemens Aktiengesellschaft Hub- und Schwenkvorrichtung für einen Deckel eines Ofens sowie Ofenanlage und Verfahren zum Chargieren und zur Wartung einer solchen Ofenanlage
DE102010041692A1 (de) 2010-09-30 2012-04-05 Siemens Aktiengesellschaft Hub- und Schwenkvorrichtung für einen Deckel eines Ofens sowie Ofenanlage und Verfahren zum Chargieren und zur Wartung einer solchen Ofenanlage
EP2685192A1 (fr) * 2012-07-11 2014-01-15 Siemens VAI Metals Technologies GmbH Four à arc
CN112944914A (zh) * 2021-02-01 2021-06-11 中国电子科技集团公司第四十八研究所 一种立式氧化炉摆动炉门装置及立式氧化炉

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE539482C (de) * 1931-11-28 Demag Elektrostahl G M B H Ofendeckel
GB102365A (en) * 1916-06-22 1916-11-30 James Keith Improvements in Lids or Covers for Crucible Furnaces.
US1818239A (en) * 1929-09-25 1931-08-11 Pittsburgh Res Corp Electric furnace
US3979551A (en) * 1975-09-24 1976-09-07 Hawley Manufacturing Corporation Arc furnace fumes control system
DE3120613C2 (de) * 1981-05-23 1983-03-17 Mannesmann AG, 4000 Düsseldorf Hubvorrichtung für einen Deckel eines Lichtbogenofens
AT371921B (de) * 1981-10-09 1983-08-10 Voest Alpine Ag Elektroofen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008012280A1 (de) * 2008-03-03 2009-09-10 Fuchs Technology Ag Lichtbogenofen
DE102012001907A1 (de) * 2012-02-02 2013-08-08 Badische Stahl-Engineering Gmbh Kombiniertes Hub- und Schwenkwerk

Also Published As

Publication number Publication date
DE3665768D1 (en) 1989-10-26
EP0203339A3 (en) 1987-04-22
EP0203339A2 (fr) 1986-12-03
DE3514293A1 (de) 1986-10-30

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