EP0077319B1 - Four électrique - Google Patents

Four électrique Download PDF

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Publication number
EP0077319B1
EP0077319B1 EP82890136A EP82890136A EP0077319B1 EP 0077319 B1 EP0077319 B1 EP 0077319B1 EP 82890136 A EP82890136 A EP 82890136A EP 82890136 A EP82890136 A EP 82890136A EP 0077319 B1 EP0077319 B1 EP 0077319B1
Authority
EP
European Patent Office
Prior art keywords
lifting
lifting column
furnace
supporting post
cover
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
EP82890136A
Other languages
German (de)
English (en)
Other versions
EP0077319A1 (fr
Inventor
Ernst Riegler
Ernst Zajicek
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 Austria GmbH
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0077319A1 publication Critical patent/EP0077319A1/fr
Application granted granted Critical
Publication of EP0077319B1 publication Critical patent/EP0077319B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/04—Object engaging heads for jacks

Definitions

  • the invention relates to an electric furnace, such as an arc furnace or a plasma melting furnace, with a lifting mechanism that actuates a furnace cover, which has a fixed supporting pin, a lifting drive device arranged inside the fixed supporting pin, and an axially displaceably guided on the fixed supporting pin by means of an upper and a lower bearing and lifted by means of the lifting drive device - And lowerable, with the furnace cover in and out of engagement lifting column.
  • a lifting mechanism that actuates a furnace cover, which has a fixed supporting pin, a lifting drive device arranged inside the fixed supporting pin, and an axially displaceably guided on the fixed supporting pin by means of an upper and a lower bearing and lifted by means of the lifting drive device - And lowerable, with the furnace cover in and out of engagement lifting column.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to provide an electric furnace of the type described above, which has a hoist that is either low in comparison to the hoist described above or in comparison to this hoist with the same overall height allows lower forces in the bearings of the lifting column.
  • the hollow lifting column surrounds the stationary support pin peripherally and in that the lifting drive device, preferably a double-acting hydraulic cylinder, on the one hand articulated with a front plate closing the lifting column at its upper end and on the other hand with a stationary part of the system, such as the Foundation or the fixed support pin, is articulated.
  • the lifting drive device preferably a double-acting hydraulic cylinder
  • Fig. 1 shows a plasma melting plant in side view
  • Fig. 2 in plan. 3 and 4 show a section through the lid lifting mechanism, u. between once (Fig. 3) in the lowered and once (Fig. 4) in the raised position of the lid.
  • An upper part 1 of a plasma melting furnace in particular a plasma primary melting furnace, is provided with a cover 2, which is supported by a cover supporting structure 3.
  • a flue gas manifold 4 protrudes from the cover to a suction device (not shown).
  • the lid lifting mechanism 5 and the lid pivoting mechanism 6 are arranged laterally next to the furnace upper part 1.
  • the lower furnace part 7 rests with weighing beams 8 on raceways 9 supported on the foundation 10.
  • the lid lifting mechanism 5 has a rigidly connected to the foundation 10, for. B. screwed hollow support pin 15 which is arranged within a hollow sleeve-shaped lifting column 16. Between the lifting column 16 and the support pin 15, lifting, lowering and pivoting of the lifting column 16 on the support pin 15 enable bearings 17, 18 are provided, which are designed as bearing bushes, advantageously as bronze sliding bearing bushes. The bearing bushes are fastened to the lifting column 16 and slide when the lifting column 16 moves relative to the fixed support pin 15 along slideways 19, 20 provided thereon.
  • the lifting column 16 is closed at its upper end with an end plate 21.
  • This end plate has on the outside a conical load bearing 22, which is in the lowered position of the cover structure 3 and the lifting column 16 at a distance 23 below the cover structure 3, so that on the one hand no vibrations of the cover structure 3 can be transmitted to the cover lifting mechanism 5 during the melting process on the other hand, the furnace vessel 1, 7 can be tilted freely into the pouring or deslagging position.
  • the load bearing 22 projects into a corresponding recess 24 in the cover structure 3.
  • An inclined surface 26 provided near the lower end 25 of the lifting column 16 comes to correspond to one during the lifting the counter bevel surface 27, which is arranged on a vertical upright 28 of the cover supporting structure 3, engages.
  • the vertical upright 28 seated on the lower furnace part 7 in the lowered position of the cover structure projects with a bolt 29 arranged at its lower end when the cover structure 3 is in a lowered position in a corresponding recess 30 of the lower furnace part 7.
  • the upper (17) of the bearing bushes 17, 18 is in the lowered position of the lifting column 16 at a distance 31 below a radially outwardly projecting annular flange 32 of the support pin 15, which distance corresponds at least to the lifting height of the lifting column 16.
  • the lower bearing bush 18 is arranged at the lower end of the lifting column 16 and is held by an annular flange 34 which projects radially inwards and is provided with a seal 33.
  • the annular space 36 present between the bearing bushes 17, 18, which are spaced as far apart as possible 35, is filled with lubricant, which is constantly in this annular space.
  • This has the advantage that a highly viscous oil can be used, which ensures a correspondingly long service life of the bearing bushes 17, 18.
  • the bearing bushes expediently have conical inlet and outlet surfaces, not shown, which run obliquely to form a lubricating film.
  • a hydraulic cylinder 38 is arranged in the cavity 37 of the support pin 15 and is connected in an articulated manner with its lower end to the foundation 10 and with the upper end of the piston 39 to the end plate 21.
  • the lower end could also be connected in an articulated manner to the flange 40 projecting radially from the stationary support pin 15 if this continues inwards.
  • the hydraulic cylinder 38 is double-acting, so that the lifting column can be lowered with the aid of the hydraulic cylinder until the conical load bearing 22 comes out of engagement from the corresponding recess 24 of the cover structure 3.
  • the arrangement of the bearing bushes 17, 18 at the greatest possible distance 35 and as close as possible to the ends of the fixed support pin results in a low overall height for the support pin and thus a relatively low weight and high rigidity of the construction, while the bearing load is still acceptable. Furthermore, it is possible to move very far apart for a given overall height with the bearing bushes 17, 18 using the structural height, so that the forces occurring on the bearing bushes 17, 18 caused by the cover 2 with the cover supporting structure 3 can be kept low.
  • the hydraulic cylinder could be replaced by another lifting drive device, for example a screw spindle, rack, etc., however, a hydraulic cylinder is of particular advantage in terms of assembly and repairs because of the limited space inside the support pin 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (1)

  1. Four électrique, par exemple four à arc ou four de fusion au plasma, comprenant un mécanisme élévateur (5) actionnant un couvercle de four (2) qui présente une chandelle d'appui fixe (15), un dispositif moteur d'élévation (38) disposé à l'intérieur de la chandelle d'appui fixe (25) et une colonne élévatrice (16), guidée mobile en translation axiale sur la chandelle d'appui fixe (15) au moyen d'une portée supérieure et d'une portée inférieure (17, 18) et qui peut être élevée et abaissée au moyen d'un dispositif moteur d'élévation (38) et être mise en prise et hors de prise avec le couvercle (2) du four, caractérisé en ce que la colonne élévatrice (16), qui est de configuration creuse, entoure la chandelle d'appui fixe (15) sur toute sa périphérie et en ce que le dispositif moteur d'élévation (38), de préférence, un vérin hydraulique à double effet, est articulé, d'une part, sur une plaque frontale (21) qui ferme la colonne élévatrice (16) à son extrémité supérieure et, d'autre part, sur une partie fixe de l'installation, telle que la fondation (10) ou la chandelle d'appui fixe (15).
EP82890136A 1981-10-09 1982-09-27 Four électrique Expired EP0077319B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4348/81 1981-10-09
AT0434881A AT371921B (de) 1981-10-09 1981-10-09 Elektroofen

Publications (2)

Publication Number Publication Date
EP0077319A1 EP0077319A1 (fr) 1983-04-20
EP0077319B1 true EP0077319B1 (fr) 1985-12-27

Family

ID=3562841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890136A Expired EP0077319B1 (fr) 1981-10-09 1982-09-27 Four électrique

Country Status (7)

Country Link
US (1) US4437187A (fr)
EP (1) EP0077319B1 (fr)
JP (1) JPS5872875A (fr)
AT (1) AT371921B (fr)
BR (1) BR8205900A (fr)
CA (1) CA1193304A (fr)
DE (1) DE3268166D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153375A (ja) * 1984-12-26 1986-07-12 新日本製鐵株式会社 ア−ク炉の油圧駆動装置の運転方法
DE3514293A1 (de) * 1985-04-19 1986-10-30 Fuchs Systemtechnik GmbH, 7601 Willstätt Hub- und schwenkvorrichtung fuer den deckel des ofengefaesses eines lichtbogenofens
AT387350B (de) * 1987-05-15 1989-01-10 Voest Alpine Ag Elektroofen, wie lichtbogenofen oder plasmaofen
DE4138120A1 (de) * 1991-11-19 1993-05-27 Fuchs Technology Ag Einschmelzaggregat mit ofenwiege
DE102008028966A1 (de) 2008-06-18 2009-12-24 Fuchs Technology Holding Ag Drehportal für einen Ofen
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
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
EP2685192A1 (fr) * 2012-07-11 2014-01-15 Siemens VAI Metals Technologies GmbH Four à arc
KR102133807B1 (ko) 2016-05-12 2020-07-14 후아웨이 테크놀러지 컴퍼니 리미티드 튜너블 필터

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056224A1 (fr) * 1981-01-08 1982-07-21 VOEST-ALPINE Aktiengesellschaft Four électrique tel que four à arc ou four de fusion à plasma

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1290741A (fr) * 1961-06-02 1962-04-13 Cie Constr Gros Mat Electromec Dispositif d'équilibrage du système porte-électrodes des fours à arc à régulation électrique
DE1508471B2 (de) * 1966-12-28 1971-07-01 Demag Elektrometallurgie Gmbh, 4100 Duisburg Selbsttaetige verriegelung
CH634645A5 (de) * 1978-10-04 1983-02-15 Bbc Brown Boveri & Cie Deckelhebe- und schwenkvorrichtung eines ofens, insbesondere eines lichtbogenofens.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056224A1 (fr) * 1981-01-08 1982-07-21 VOEST-ALPINE Aktiengesellschaft Four électrique tel que four à arc ou four de fusion à plasma

Also Published As

Publication number Publication date
US4437187A (en) 1984-03-13
BR8205900A (pt) 1983-09-06
JPS6327634B2 (fr) 1988-06-03
ATA434881A (de) 1982-12-15
DE3268166D1 (en) 1986-02-06
JPS5872875A (ja) 1983-04-30
EP0077319A1 (fr) 1983-04-20
CA1193304A (fr) 1985-09-10
AT371921B (de) 1983-08-10

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