EP0036473A2 - Dispositif de desserrage pour support d'électrodes dans des fours à fusion électrique - Google Patents

Dispositif de desserrage pour support d'électrodes dans des fours à fusion électrique Download PDF

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Publication number
EP0036473A2
EP0036473A2 EP81100456A EP81100456A EP0036473A2 EP 0036473 A2 EP0036473 A2 EP 0036473A2 EP 81100456 A EP81100456 A EP 81100456A EP 81100456 A EP81100456 A EP 81100456A EP 0036473 A2 EP0036473 A2 EP 0036473A2
Authority
EP
European Patent Office
Prior art keywords
electrode
arm
hydraulic
fluid
pneumatic
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
EP81100456A
Other languages
German (de)
English (en)
Other versions
EP0036473B1 (fr
EP0036473A3 (en
Inventor
Franz-Josef Hillers
Heinz Berentsen
Norbert Jäger
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.)
MAN AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6097904&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0036473(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Priority to AT81100456T priority Critical patent/ATE5039T1/de
Publication of EP0036473A2 publication Critical patent/EP0036473A2/fr
Publication of EP0036473A3 publication Critical patent/EP0036473A3/de
Application granted granted Critical
Publication of EP0036473B1 publication Critical patent/EP0036473B1/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
    • H05B7/103—Mountings, supports or terminals with jaws

Definitions

  • the invention relates to an opening device for electrode holders which can be adjusted via levers or rods, with clamping jaws pressed against the electrode by spring force, and hydraulic or pneumatic means available for canceling the contact pressure.
  • Electrical melting furnaces are supplied with electrical energy via high-current cables and copper power tubes, which are attached to water-cooled electrode arms that can be moved in a vertical plane and are connected to fixed contact jaws of the water-cooled electrode holders for the electrodes arranged on one end of the electrode arms.
  • a clamping jaw is arranged opposite the latter, which presses the electrode firmly and at the same time holds it.
  • the contact pressure is generated by a preloaded spring and transferred to the electrode holder via levers and rods.
  • the spring force acting on the clamping jaw is released and the clear width of the electrode holder is increased beyond the diameter of the graphite electrode.
  • the contact pressure is canceled by means of a pneumatic or hydraulic cylinder, the piston of which compresses the spring when acted upon by pressure medium and the clamping device of the electrode holder now moves in the "open" direction.
  • the pressure medium is switched off and the spring force again causes the electrode to be securely pressed and held in the electrode holder.
  • the clamping and Opening device arranged outside the movable electrode arm (DE-PS 847 319). It has also been proposed to arrange the tension spring within the electrode arm (DE-PS 946 303).
  • the hydraulically operated pressure cylinder for canceling the contact pressure has the advantage over the pneumatically operated that its dimensions are smaller.
  • the hydraulic or pneumatic cylinder is supplied with pressure medium via flexible pressure hoses that are connected to the corresponding supply unit on the furnace platform.
  • Disadvantages of the described devices are their unprotected arrangement in the hot atmosphere prevailing over the furnace and the effect of the magnetic fields of the energy supply for the furnace, and in particular the mechanically highly stressed flexible supply hoses for the pressure medium, which are corresponding to the travel of the electrode arm, which are considerable Susceptibility to failure and risk of accident.
  • the solution to the problem is that all of the components which generate and transmit the opening force for canceling the contact pressure are arranged within the electrode arm.
  • the interior of the electrode arm is particularly suitable for receiving the complete opening device, since its outer jacket is double-walled and a cooling medium flows through it, and as a result the temperature inside is almost constant.
  • the complete hydraulic unit for generating the fluid pressure for the operation of the hydraulic cylinder consisting of a reservoir, electric motor, pump, control devices and connecting hoses, is also arranged within the electrode arm.
  • a pneumatic cylinder is used to open the electrode holder instead of a hydraulic cylinder, the complete pneumatic unit for generating the required pressure, consisting of an electric motor, compressor, pressure vessel, control devices and connecting hoses, is arranged inside the electrode arm.
  • the hydraulic or pneumatic unit can be installed and removed as a compact unit.
  • the electrode arm which can be moved in a vertical plane above the electric melting furnace is designated by 1.
  • a fixed contact jaw 2 for connecting the power supply line 3 and transmitting the current to the graphite electrode 4 is arranged on the end face thereof. This is held in the displaceable electrode holder 5 and pressed firmly by the clamping jaw 6 arranged therein against the contact surface on the contact jaw 2 facing the electrode.
  • the electrode holder 5 is mounted within the electrode arm 1 and provided with a fork head 7 for receiving the push rod 8.
  • a prestressed spring 9 is arranged, which generates the contact pressure for the graphite electrode.
  • the piston which is displaceable by the opening path, is pressed together by the piston of the hydraulic cylinder 10.
  • the pressure medium for the operation of the hydraulic cylinder 10 is provided by the hydraulic unit 11. It is constructed in a compact design and comprises the reservoir 11a, the electric motor 11b, the pump 11c as well as control devices and connection connections 11d.
  • the hydraulic unit 11 is as one unit stored in vibration-damped manner on elastic members 12 within the electrode arm 1. Complete electrical insulation of all connecting elements is also provided.
  • the chamber for the hydraulic unit is shielded against the magnetic fields of the energy supply for the electrode except for the cross-section of the tube 13, which serves for the air supply for the motor 11b and receives the power supply cable, and is lined on all sides with an electrically non-conductive mass.
  • the assembly opening is closed with a water-cooled cover 16.
  • the electrode arm 1 shown in FIG. 2 is equipped with a pneumatically operated opening device for the electrode holder 5.
  • the structure is similar to the hydraulic device.
  • the spring 9 is actuated by the piston of the pneumatic cylinder 14.
  • the unit 15 serves to generate the necessary air pressure and consists of the electric motor 15a, the compressor 15b, the pressure container 15c, control devices and connecting hoses 15d.
  • the storage is also vibration-damped and electrically insulated in a shielded chamber with an air supply 13.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Silicon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP81100456A 1980-03-21 1981-01-22 Dispositif de desserrage pour support d'électrodes dans des fours à fusion électrique Expired EP0036473B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100456T ATE5039T1 (de) 1980-03-21 1981-01-22 Oeffnungseinrichtung fuer elektrodenhalter an elektrischen schmelzoefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3010894 1980-03-21
DE3010894A DE3010894C2 (de) 1980-03-21 1980-03-21 Elektroden-Tragarm mit Öffnungsvorrichtung für Klemmbacken von elektrischen Lichtbogenöfen

Publications (3)

Publication Number Publication Date
EP0036473A2 true EP0036473A2 (fr) 1981-09-30
EP0036473A3 EP0036473A3 (en) 1981-12-02
EP0036473B1 EP0036473B1 (fr) 1983-10-12

Family

ID=6097904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100456A Expired EP0036473B1 (fr) 1980-03-21 1981-01-22 Dispositif de desserrage pour support d'électrodes dans des fours à fusion électrique

Country Status (8)

Country Link
US (1) US4385391A (fr)
EP (1) EP0036473B1 (fr)
JP (1) JPS597196B2 (fr)
AT (1) ATE5039T1 (fr)
BR (1) BR8101678A (fr)
DE (2) DE3010894C2 (fr)
ES (1) ES8201301A1 (fr)
NO (1) NO152315C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563404A1 (fr) * 1984-04-19 1985-10-25 Stein Heurtey Bras de support pour electrode de four poche
EP0340726A1 (fr) * 1988-05-02 1989-11-08 Uwe Kark Bras de support pour électrode d'un four à arc électrique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653066A (en) * 1984-04-11 1987-03-24 Dixie Arc, Inc. Electrode holder assembly and electrode clamp for electric arc furnaces
JPS6382983A (ja) * 1986-09-24 1988-04-13 清水建設株式会社 クリンカ−サイロ
US6666665B1 (en) * 1999-03-04 2003-12-23 Baxter International Inc. Fluid delivery mechanism having a plurality of plungers for compressing a metering chamber
US6773678B2 (en) 2000-03-20 2004-08-10 Endress + Hauser Conducta Gesellschaft Fur Mess Und Regeltechnik Mbh + Co. Mounting system and retractable sensor holder for analytical sensors
DE10311426B4 (de) * 2002-12-20 2016-06-16 Arndt Dung Einspannung für eine auswechselbare Elektrode eines Elektroschmelzaggregats
DE10239470A1 (de) * 2002-08-28 2004-03-11 Arndt Dung Verfahren und Vorrichtungen zur Überwachung des von einem Anstellzylinder herrührenden, eine auswechselbare Elektrode am Elektrodentragarm festlegenden Spanndrucks
DE10261162B4 (de) * 2002-12-20 2016-03-10 Arndt Dung Einspannung für die auswechselbare Elektrode eines Elektroschmelzaggregats
DE102010052086A1 (de) * 2010-03-10 2011-09-15 Sms Siemag Ag Elektrodentragarmsystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689278C (de) * 1935-04-05 1940-03-15 Demag Elektrostahl G M B H Mehrteilige, an einem Ausleger vorgesehene Elektrodenklemme
US2148834A (en) * 1937-03-13 1939-02-28 Payne William Harvey Clamping mechanism for electric arc furnace electrodes
US2538603A (en) * 1946-07-17 1951-01-16 Thys Edouard Furnace electrode holder
US2587045A (en) * 1949-01-25 1952-02-26 Asea Ab Clamping device for electrodes of arc furnaces
US2623080A (en) * 1950-10-05 1952-12-23 Volta Mfg Co Ltd Electrode retainer
US3393265A (en) * 1966-08-11 1968-07-16 Whiting Corp Indicator for electrode clamping mechanism
US3444305A (en) * 1968-06-13 1969-05-13 Alfred H Turner Electrode head for electric furnace electrodes
US3686421A (en) * 1971-08-30 1972-08-22 Edgar Wunsche Unitized electride holder and arm for electric arc furnace electrodes or the like
US4182927A (en) * 1978-08-04 1980-01-08 Dixie Bronze Company Electrode holders having differential clamping devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563404A1 (fr) * 1984-04-19 1985-10-25 Stein Heurtey Bras de support pour electrode de four poche
EP0340726A1 (fr) * 1988-05-02 1989-11-08 Uwe Kark Bras de support pour électrode d'un four à arc électrique
WO1989011203A1 (fr) * 1988-05-02 1989-11-16 Badische Stahl Engineering Gmbh Bras de support d'electrode pour four a arc electrique

Also Published As

Publication number Publication date
DE3010894C2 (de) 1985-12-12
EP0036473B1 (fr) 1983-10-12
JPS56144386A (en) 1981-11-10
BR8101678A (pt) 1981-09-22
ES499886A0 (es) 1981-12-16
DE3161142D1 (en) 1983-11-17
NO810958L (no) 1981-09-22
NO152315C (no) 1985-09-04
EP0036473A3 (en) 1981-12-02
ES8201301A1 (es) 1981-12-16
DE3010894A1 (de) 1981-10-01
ATE5039T1 (de) 1983-10-15
US4385391A (en) 1983-05-24
JPS597196B2 (ja) 1984-02-16
NO152315B (no) 1985-05-28

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