EP0201801A2 - Tête de contact pour porte-électrode - Google Patents

Tête de contact pour porte-électrode Download PDF

Info

Publication number
EP0201801A2
EP0201801A2 EP86105909A EP86105909A EP0201801A2 EP 0201801 A2 EP0201801 A2 EP 0201801A2 EP 86105909 A EP86105909 A EP 86105909A EP 86105909 A EP86105909 A EP 86105909A EP 0201801 A2 EP0201801 A2 EP 0201801A2
Authority
EP
European Patent Office
Prior art keywords
contact jaw
electrode holder
coating
insulating material
contact
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.)
Withdrawn
Application number
EP86105909A
Other languages
German (de)
English (en)
Other versions
EP0201801A3 (fr
Inventor
Hans Friedrich
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.)
Fried Krupp 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
Publication of EP0201801A2 publication Critical patent/EP0201801A2/fr
Publication of EP0201801A3 publication Critical patent/EP0201801A3/fr
Withdrawn legal-status Critical Current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
    • H05B7/103—Mountings, supports or terminals with jaws

Definitions

  • the invention relates to a copper contact jaw which is insulated from and releasable to the electrode socket of an electric furnace for the current transmission from the supply lines to the electrodes.
  • Such contact jaws have so far been cast or welded in one or more parts and, if appropriate, have been made with a reinforcement made of stainless steel. Since the insulation layer arranged between the contact jaw and the electrode holder, which is intended to prevent the formation of secondary currents, has often led to damage, which necessitated frequent replacement of the insulating layer, it has already become known to remedy the disadvantage that the surfaces of the electrode holder lying opposite the contact jaw to be coated with an aluminum oxide coating. With this coating, however, the layer thickness has proven to be insufficient, so that neither a sufficient insulating effect nor a satisfactory service life of the insulating layer is achieved.
  • the invention has for its object to counter this disadvantage and to create a contact jaw of the type mentioned, which withstands high and highest loads.
  • the invention consists in the features of the characterizing part of claim 1.
  • the contact jaw according to the invention has the advantage that the layer thickness of the insulating layer could be increased considerably.
  • Advantageous embodiments of the invention are given in claims 2 to 5.
  • the coating is produced by an injection molding process.
  • a chromium-zirconium alloyed and tempered hard copper in which the zirconium content is between 0.003 and 0.5% and the chromium content between 0.3 and 1.2, gives good results with regard to a particularly large thickness of the insulating layer % lies. These contents depend in particular on the homogeneity of the copper melt, i.e. if the homogeneity is high, the lower limit values can suffice.
  • the mechanical properties of the hard copper are significantly improved by heat treating the material before applying the insulating layer.
  • the contact jaw consists of a bar 1, which is shaped in the shape of a cylinder jacket to adapt to the surface of the indicated electrode 2 and is provided at its upper end with a lug (3) for connection to the current supply lines.
  • the bar 1 is provided in the region of its upper end with a bracket 5 which is supported against the top of the electrode holder 4 and by means of two locking screws 6 which reach through holes 7 in the bracket 5 , is attached.
  • a stiffening web 8 is welded in between the flag 3 and the bracket 5.
  • the ingot 1 has, as can be seen from FIGS. 2 and 3, a vertically extending recess 9 on its side facing the electrode 2, so that there is a symmetrical contact surface 10 on both sides.
  • the ingot 1 also has lines 11 for water cooling.
  • the electrode holder 4 has an upper and a lower contact surface 12 or 13 facing the electrode 2, each of which is opposite a coating 14 made of insulating material, which is sprayed onto the bars 1 at this point.
  • the underside of the console 5 also has an equally thick coating 15 made of the same insulating material. The coating 15 is drawn around the lower edges of the console 5 for better insulation and merges into the coating 15 at the corner between the ingot 1 and the console 5. Between the coatings 14 and 15 on the one hand and the bar 1 or the console 5 on the other is one metallic adhesive layer made of a nickel-aluminum alloy.
  • the support surfaces 12 and 13 of the electrode holder 4 each encompass the bar 1 by a certain amount, as can be seen from FIG. 2.
  • a lateral guide 16, which is incorporated into the electrode holder 4, is incorporated in each case at the points of the lateral gripping to prevent transverse movements of the ingot 1 under load.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Liquid Crystal (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Measurement Of Radiation (AREA)
  • Surgical Instruments (AREA)
  • Contacts (AREA)
  • Arc Welding In General (AREA)
EP86105909A 1985-05-11 1986-04-29 Tête de contact pour porte-électrode Withdrawn EP0201801A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853517069 DE3517069A1 (de) 1985-05-11 1985-05-11 Kontaktbacke einer elektrodenfassung
DE3517069 1985-05-11

Publications (2)

Publication Number Publication Date
EP0201801A2 true EP0201801A2 (fr) 1986-11-20
EP0201801A3 EP0201801A3 (fr) 1988-01-20

Family

ID=6270520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105909A Withdrawn EP0201801A3 (fr) 1985-05-11 1986-04-29 Tête de contact pour porte-électrode

Country Status (4)

Country Link
US (1) US4700356A (fr)
EP (1) EP0201801A3 (fr)
DE (1) DE3517069A1 (fr)
NO (1) NO861734L (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122151A1 (de) * 1991-07-04 1993-01-07 Flohe Gmbh & Co Elektrodenfassung eines elektrodentragarms
DE102004005051A1 (de) * 2004-01-30 2005-08-18 Arndt Dung Am freien Ende eines Bestandteil eines Elektroofens bildenden Elektrodentragarms auswechselbar angeordnete Kontaktbacke
KR100648614B1 (ko) 2005-12-09 2006-11-23 주식회사 포스코 전극봉 절손 방지 기능을 갖는 전극봉 클램핑 장치
CN102781132A (zh) * 2012-07-29 2012-11-14 江苏德诚冶金电炉设备有限公司 矿热炉用双顶块铜瓦

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT318935B (de) * 1972-03-22 1974-11-25 Osterreichische Brown Boveri W Klemmbacken für lösbare Hochstromverbindungen, insbesondere in Elektroschlacke-Umschmelzanlagen oder bei Elektroöfen
US4323717A (en) * 1979-02-07 1982-04-06 British Steel Corporation Furnace electrode clamps
FR2466168A1 (fr) * 1979-09-24 1981-03-27 Roche Maurice Perfectionnement aux dispositifs d'amenee de courant electrique a, par exemple, une electrode de four electrometallurgique
US4417097A (en) * 1981-06-04 1983-11-22 Aluminum Company Of America High temperature, corrosion resistant coating and lead for electrical current
BG36780A1 (en) * 1983-03-15 1985-01-15 Peev Contact head for electrode holders in electric arc furnaces

Also Published As

Publication number Publication date
NO861734L (no) 1986-11-12
DE3517069A1 (de) 1986-11-13
EP0201801A3 (fr) 1988-01-20
US4700356A (en) 1987-10-13

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