EP0061612A1 - Système de conducteurs pour courant intense pour fours électriques - Google Patents

Système de conducteurs pour courant intense pour fours électriques Download PDF

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Publication number
EP0061612A1
EP0061612A1 EP82101844A EP82101844A EP0061612A1 EP 0061612 A1 EP0061612 A1 EP 0061612A1 EP 82101844 A EP82101844 A EP 82101844A EP 82101844 A EP82101844 A EP 82101844A EP 0061612 A1 EP0061612 A1 EP 0061612A1
Authority
EP
European Patent Office
Prior art keywords
electrode
vertical part
support arm
support arms
composite material
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
EP82101844A
Other languages
German (de)
English (en)
Other versions
EP0061612B1 (fr
Inventor
Joachim Ehle
Alfred Wagner
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.)
Cessione mannesmann AG
Original Assignee
Fried Krupp 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 Fried Krupp AG filed Critical Fried Krupp AG
Priority to AT82101844T priority Critical patent/ATE14816T1/de
Publication of EP0061612A1 publication Critical patent/EP0061612A1/fr
Application granted granted Critical
Publication of EP0061612B1 publication Critical patent/EP0061612B1/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
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc

Definitions

  • the invention relates to a high-current line system for electric furnaces with at least one liquid-cooled, essentially horizontal electrode support arm which is formed from a closed hollow profile and serves as a current conductor.
  • the high-current lines in the region of the electrode support arms are generally arranged above and parallel to them.
  • the support arm made of steel or non-magnetic material is induced by the heat that occurs
  • the invention is therefore based on the object of providing a high-current line system of the type mentioned at the outset which enables the electrode to be moved quickly and safe to grasp and reduce the losses of the electrical wiring system
  • the solution to this problem is given in the characterizing part of claim 1.
  • the electrode is provided, via a screwed-in nipple, with a connecting part for a fastening means of a tensioning device, which is the subject of claims 6 to 10.
  • the connection part is previously screwed onto the prepared new electrode and clamped in a very short time by the expansion cone of the tensioning device, thereby holding the electrode with the tensioning device.
  • the residual electrode to be removed can also be removed simply and quickly.
  • the connector still on the remaining electrode can be used again.
  • the support arm 2 fastened on the electrode guide column 1 has an upright rectangular cross section, the four corners of which are rounded.
  • the closed hollow profile of the support arm 2 is composed of two sheets of copper-steel composite material which extend practically over its entire length so that a longitudinal seam 3 is formed on each side such that only the steel as the load-bearing internal component 4 is welded.
  • the external component 5 of the composite material consists of copper and, since it only has a current-conducting function, does not need to be welded at least over the substantial part of the length of the electrode support arm 2.
  • the composite material enables a particularly favorable combination of mechanical load-bearing and electrical control behavior.
  • the electrode guide column 1 has an insulating plate 5 and a chuck 6, through the two vertical bores 7 of which a hammer head screw 9 covered with an insulating sleeve 8 is inserted from above.
  • a hammer head screw 9 covered with an insulating sleeve 8 is inserted from above.
  • Centrally to the holes 7 are arranged in the lower plate 10 of the electrode support arm 2 slots 11 through which the head of the hammer head screw 9 fits in a known manner and is then rotated in a known manner by 90 0 for attachment.
  • a disc 12 is provided with an elongated hole made of an insulating material.
  • the hammer head screws are covered within the electrode support arm with a sealing housing 13.
  • the support arms 2 are each provided with a vertical part 14 of the same type, which in the lowered state extends into the furnace (not shown).
  • the vertical part 14 is flanged to the support arm 2 so that the transition of the electrical current is ensured. The latter is e.g. then always the case when the vertical part is welded to the support arm 2 as a further embodiment.
  • the part 14 is provided with a clamping device 15 for a clamping nipple 16, which holds the graphite electrode 17 and thereby presses against a lower annular outer surface 28 of the vertical part 14, where the current transfer to the electrode 17 occurs essentially (FIG. 4).
  • the vertical part 14 is water-cooled.
  • the cooling water is introduced into the interior of the support arm 2 via connections 18 on the side facing away from the furnace and reaches the interior of the vertical part 14 via bypass channels 19 and from here through a central channel 20 of the clamping nipple 16 via further channels 21, 22 and 23 back into the support arm 2, where it is passed through channels 24 and exits at the end facing away from the furnace.
  • the composite material of the vertical part 14, as shown in FIG. 4, is covered on the outside with a jacket 25 of refractory material.
  • the vertical part 14 enables the length of the graphite electrode to be shortened, which on the one hand improves the vibration behavior of the system and on the other hand facilitates the removal of the electrode by the clamping device 15.
  • a connecting flange 26 for the flexible high-current cables 27 is fastened in a highly conductive manner (FIG. 3).
  • the two longer support arms have a greater moment of inertia or section modulus than the shorter support arm.
  • the easiest way to achieve this in a known manner is to increase the height of the cross-section of the support arm.
  • Fig. 5 shows an embodiment in which the support arm 2 is composed of four plates welded to the corners of the profile.
  • the support arm with a round cross section according to FIG. 6 only the internal load-bearing component made of ferritic or austenitic steel is welded here.
  • the electrode support arms 2 are arranged such that a support arm 30 is higher than the other two support arms 31, 32.
  • the composite material is only used for the mutually facing walls of the support arms, because only these are mainly supplied with current. This saves expensive material.
  • the lower half of the support arm 30 is made of composite material, while the inner and upper walls of the support arms 31 and 32 are each made of composite material.
  • the composite parts consist of in each case a correspondingly bent part, the steel component of which is welded to the steel material of the respectively adjoining wall parts.
  • FIG 8 shows an exemplary embodiment of the vertical part 14, which is connected to the electrode support arm via a flange 33 and has a cooling jacket which can be filled with water.
  • the cooling jacket is formed by a vertical annular space 36 formed between an outer tube 34 and an inner tube 35.
  • eight tubular inlet channels 37 are arranged so as to extend vertically over the entire length of the annular space 36.
  • the upper end of the inlet channels 37 is connected to the bypass channels 19 which supply the cooling water via the support arm 2.
  • the inlet channels have lateral outlet openings 38 through which the supplied cooling water flows into the annular space 36 and is then discharged again via the channels 23 connected to them above and the channels 24 connected via the support arm.
  • a cylinder 39 is arranged axially, in which a pull rod 41 emerging from it at the bottom and provided with a piston 40 at the upper end is displaceably guided.
  • the cylinder 39 is closed with a screwed flange cover 42, which is connected to a pressure oil supply via a bore 43.
  • the annular space 44 of the cylinder 39 located under the piston 40 is provided with disk springs 44 which are supported at the bottom of the cylinder and at the top of the piston.
  • the pull rod 41 has at its lower end an upwardly tapering expansion cone 45, which extends from an annular one to the circumference evenly distributed segments 46 surrounding expansion cone.
  • the segments 46 are connected to a tube 47 serving as a holder by welding, which is arranged axially with the tension span 41 and is screwed to the cylinder 39 at its upper end via a flange 48.
  • the lower end of the tube 47 is flared and provided with longitudinal slots 49 between the individual segments 46 such that radial resilient movements of the segments 46 are made possible.
  • the electrode 17 is provided at its connection end with a conical threaded bore 50, into which a nipple 51 having a double-conical shape and completely provided with an external thread is screwed.
  • a nipple bell provided with a corresponding internal thread is screwed onto the projecting end of the nipple 51 to fasten the electrode 17 to the vertical part 14 as a connecting part.
  • the nipple bell 52 is a rotationally symmetrical part and has at the other end, which is not provided with an internal thread, a central conical bore 53 which tapers outwards.
  • the nipple bell 52 also has two blind holes 58 on its outside opposite one another which serve as attachment means for a hoist.
  • the replacement of the electrode proceeds as follows: To release the used residual electrode 17, the pull rod 41 is moved downward by pressurizing its end face and the piston 40 and thereby releases the segments 46 that are free by springing the tongue-like parts of the lower end of the tube 47 at least as far inward that the narrowest point of the bore 53 is free.
  • the remaining electrode together with the nipple 51 and the nipple bell 52 can be pulled down.
  • a new electrode also provided with a nipple 51 and a screwed-on nipple bell 52, is inserted into the connection end of the vertical part, so that the upper annular end face of the electrode 17 abuts the lower annular outer surface 28.
  • a length compensator 54 of the tube 47 is used for any adjustment movements of the annular expansion cone in the axial direction.
  • the current essentially flows via the outer tube 34, which can also consist entirely or partially of composite material, and is conducted to a small extent via the inner tube 35.
  • the tensioning device is opposite the live pipes 34 and 35 by annular insulating material 55, which are arranged between the cover 42 and cylinder 39 on the one hand and its mounting flange 56 on the other.
  • the outer tube 34 is surrounded in the lower region, reaching approximately to the support arm 2, by a jacket 57 made of insulating material, which is composed of interchangeable rings which are made of an impact-resistant ceramic material. This insulation reduces cooling water consumption.
  • the electrode support arm 2 has at its end facing away from the furnace a further tubular vertical part 58 which is welded to the underside of the support arm.
  • the vertical part 58 is provided on its outside with a welded-on flange bracket 59 for the connection of the high-current cables 27.
  • This further vertical part brings about a further improvement in the reactance symmetry of the system even with a relatively short design; so that its useful length depends on the respective local and constructional conditions, e.g. Size of the furnace, location of cables and transformer or the control panel can adjust.
  • the material or composite material used for the electrode support arm and for the two vertical parts depends, in addition to the desired carrying behavior, primarily on whether direct or alternating or three-phase current is used. While simple structural steel (carbon steel) is often suitable for direct current, at are AC use in addition to the composite materials, such as those made of aluminum and steel or preferably copper and steel, particularly well suited to non-magnetic chromium-alloyed stainless steels.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Waveguides (AREA)
  • Electric Stoves And Ranges (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Magnetic Heads (AREA)
  • Selective Calling Equipment (AREA)
EP82101844A 1981-03-24 1982-03-09 Système de conducteurs pour courant intense pour fours électriques Expired EP0061612B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82101844T ATE14816T1 (de) 1981-03-24 1982-03-09 Hochstromleitungssystem fuer elektrooefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3111485 1981-03-24
DE3111485 1981-03-24

Publications (2)

Publication Number Publication Date
EP0061612A1 true EP0061612A1 (fr) 1982-10-06
EP0061612B1 EP0061612B1 (fr) 1985-08-07

Family

ID=6128124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101844A Expired EP0061612B1 (fr) 1981-03-24 1982-03-09 Système de conducteurs pour courant intense pour fours électriques

Country Status (9)

Country Link
US (1) US4453254A (fr)
EP (1) EP0061612B1 (fr)
JP (1) JPS57170492A (fr)
AT (1) ATE14816T1 (fr)
BR (1) BR8201619A (fr)
CA (1) CA1169457A (fr)
DE (1) DE3265147D1 (fr)
ES (1) ES8303874A1 (fr)
MX (1) MX151275A (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3319389A1 (de) * 1983-05-26 1984-11-29 Mannesmann AG, 4000 Düsseldorf Kuehlungsvorrichtung fuer elektrodenverbindungsnippel an lichtbogenoefen
DE3422950A1 (de) * 1983-06-23 1985-01-31 Mannesmann AG, 4000 Düsseldorf Elektrode fuer lichtbogenofen mit elektrodenbruchsicherung
EP0135473A1 (fr) * 1983-08-13 1985-03-27 Arc Technologies Systems, Ltd. Assemblage d'électrode pour fours à arc
EP0167485A1 (fr) * 1984-06-25 1986-01-08 Arc Technologies Systems, Ltd. Assemblage pour relier automatiquement l'eau de refroidissement à des électrodes combinées refroidies à l'eau pour fours à arcs électriques
EP0218141A1 (fr) * 1985-09-27 1987-04-15 Great Lakes Carbon Corporation Joint d'électrode échancré pour électrodes refroidies par eau
FR2682254A1 (fr) * 1991-10-02 1993-04-09 Clecim Sa Dispositif de maintien d'electrode dans un four a arc.
EP0594272A1 (fr) * 1992-10-20 1994-04-27 MANNESMANN Aktiengesellschaft Bras de support pour électrode d'un four à arc électrique
US5676007A (en) * 1994-10-18 1997-10-14 Leifeld Gmbh & Co. Flow-forming-machine
EP1901586A1 (fr) * 2006-09-18 2008-03-19 Homa Gesellschaft f. Hochstrom- Magnetschalter v. Vollenbroich GmbH & Co. KG Bras de support pour électrode
WO2011009622A1 (fr) 2009-07-23 2011-01-27 Fuchs Technology Holding Ag Bras de support d'électrode avec conducteur de courant fixé localement
WO2014044548A1 (fr) * 2012-09-20 2014-03-27 Siemens Vai Metals Technologies Gmbh Dispositif et procédé de changement d'au moins une électrode d'un récipient pour fonderie
EP2928267A1 (fr) * 2014-02-11 2015-10-07 Badische Stahl-Engineering GmbH Corps de bras de support d'electrode avec corps de bras de support
DE102014208516A1 (de) 2014-05-07 2015-11-12 Sms Group Gmbh Vorrichtung zum Stützen eines Elektrodenarms einer Hochstromzuführung für einen metallurgischen Ofen

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5955897U (ja) * 1982-08-13 1984-04-12 日独重工業有限会社 電弧炉用電極支持ア−ム
JPS59127393A (ja) * 1983-01-10 1984-07-23 石川島播磨重工業株式会社 ア−ク炉の電極保持導体
GB8309469D0 (en) * 1983-04-07 1983-05-11 British Steel Corp Connection of services between separable members
JPS59175293U (ja) * 1983-05-11 1984-11-22 石川島播磨重工業株式会社 電気炉の電極支持装置
DE3921238A1 (de) * 1989-06-26 1991-01-10 Mannesmann Ag Nachsetzvorrichtung fuer elektroden
JP2502823Y2 (ja) * 1993-07-12 1996-06-26 アルコインダストリーズ株式会社 電気ア―ク炉における電極支持装置及び電極支持梁
DE102006027648A1 (de) * 2006-06-13 2007-12-20 Arndt Dung Wandungselemente für einen wassergekühlten, stromführenden Elektrodentragarm und aus solchen Wandungselementen bestehende Elektrodentragarme

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE808737C (de) * 1950-03-04 1951-07-19 Eugenio Lubatti Freihaengende Elektrode fuer Schmelzoefen, insbesondere Metallschmelzoefen
DE1565382A1 (de) * 1965-06-10 1970-01-15 Asea Ab Anordnung der Zuleitungen zu Lichtbogenoefen
FR2176546A1 (en) * 1972-03-23 1973-11-02 Siderurgie Fse Inst Rech Composite furnace electrode - esp for steel prodn
DE2918757A1 (de) * 1978-05-09 1979-11-22 Canada Steel Co Elektrode fuer lichtbogenoefen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US824153A (en) * 1904-05-03 1906-06-26 Willson Aluminum Company Carbon-holder for electric furnaces.
US3686421A (en) * 1971-08-30 1972-08-22 Edgar Wunsche Unitized electride holder and arm for electric arc furnace electrodes or the like
JPS5151063A (ja) * 1974-10-30 1976-05-06 Seibu Polymer Kasei Kk Aburakaishuyogaidofuensu
US4121042A (en) * 1976-09-01 1978-10-17 The Steel Company Of Canada Limited Composite electrode with non-consumable upper section
US4168392A (en) * 1976-09-01 1979-09-18 The Steel Company Of Canada, Limited Composite electrode with non-consumable upper section
JPS5718717Y2 (fr) * 1977-06-29 1982-04-19
DE2730884B2 (de) * 1977-07-08 1980-11-13 Korf-Stahl Ag, 7570 Baden-Baden Elektrode für Lichtbogenöfen mit einem flüssigkeitsgekühlten Mantel
EP0053200B1 (fr) * 1980-12-02 1986-09-17 Arc Technologies Systems, Ltd. Electrode pour fours à arc

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE808737C (de) * 1950-03-04 1951-07-19 Eugenio Lubatti Freihaengende Elektrode fuer Schmelzoefen, insbesondere Metallschmelzoefen
DE1565382A1 (de) * 1965-06-10 1970-01-15 Asea Ab Anordnung der Zuleitungen zu Lichtbogenoefen
FR2176546A1 (en) * 1972-03-23 1973-11-02 Siderurgie Fse Inst Rech Composite furnace electrode - esp for steel prodn
DE2918757A1 (de) * 1978-05-09 1979-11-22 Canada Steel Co Elektrode fuer lichtbogenoefen

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3319389A1 (de) * 1983-05-26 1984-11-29 Mannesmann AG, 4000 Düsseldorf Kuehlungsvorrichtung fuer elektrodenverbindungsnippel an lichtbogenoefen
DE3422950A1 (de) * 1983-06-23 1985-01-31 Mannesmann AG, 4000 Düsseldorf Elektrode fuer lichtbogenofen mit elektrodenbruchsicherung
EP0135473A1 (fr) * 1983-08-13 1985-03-27 Arc Technologies Systems, Ltd. Assemblage d'électrode pour fours à arc
EP0167485A1 (fr) * 1984-06-25 1986-01-08 Arc Technologies Systems, Ltd. Assemblage pour relier automatiquement l'eau de refroidissement à des électrodes combinées refroidies à l'eau pour fours à arcs électriques
EP0218141A1 (fr) * 1985-09-27 1987-04-15 Great Lakes Carbon Corporation Joint d'électrode échancré pour électrodes refroidies par eau
FR2682254A1 (fr) * 1991-10-02 1993-04-09 Clecim Sa Dispositif de maintien d'electrode dans un four a arc.
EP0594272A1 (fr) * 1992-10-20 1994-04-27 MANNESMANN Aktiengesellschaft Bras de support pour électrode d'un four à arc électrique
GB2271836A (en) * 1992-10-20 1994-04-27 Mannesmann Ag Supporting arc furnace electrodes
GB2271836B (en) * 1992-10-20 1996-03-27 Mannesmann Ag Electrode supporting arm for arc furnaces
US5676007A (en) * 1994-10-18 1997-10-14 Leifeld Gmbh & Co. Flow-forming-machine
EP1901586A1 (fr) * 2006-09-18 2008-03-19 Homa Gesellschaft f. Hochstrom- Magnetschalter v. Vollenbroich GmbH & Co. KG Bras de support pour électrode
WO2011009622A1 (fr) 2009-07-23 2011-01-27 Fuchs Technology Holding Ag Bras de support d'électrode avec conducteur de courant fixé localement
DE102009034407A1 (de) 2009-07-23 2011-02-03 Fuchs Technology Holding Ag Elektrodentragarm mit lokal befestigtem Stromleiter
WO2014044548A1 (fr) * 2012-09-20 2014-03-27 Siemens Vai Metals Technologies Gmbh Dispositif et procédé de changement d'au moins une électrode d'un récipient pour fonderie
EP2928267A1 (fr) * 2014-02-11 2015-10-07 Badische Stahl-Engineering GmbH Corps de bras de support d'electrode avec corps de bras de support
DE102014208516A1 (de) 2014-05-07 2015-11-12 Sms Group Gmbh Vorrichtung zum Stützen eines Elektrodenarms einer Hochstromzuführung für einen metallurgischen Ofen

Also Published As

Publication number Publication date
CA1169457A (fr) 1984-06-19
ATE14816T1 (de) 1985-08-15
US4453254A (en) 1984-06-05
ES510676A0 (es) 1983-02-01
ES8303874A1 (es) 1983-02-01
JPS57170492A (en) 1982-10-20
BR8201619A (pt) 1983-02-08
JPH0449760B2 (fr) 1992-08-12
MX151275A (es) 1984-10-30
DE3265147D1 (en) 1985-09-12
EP0061612B1 (fr) 1985-08-07

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