US3796818A - Electrode connecting apparatus for furnaces - Google Patents

Electrode connecting apparatus for furnaces Download PDF

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Publication number
US3796818A
US3796818A US00340951A US3796818DA US3796818A US 3796818 A US3796818 A US 3796818A US 00340951 A US00340951 A US 00340951A US 3796818D A US3796818D A US 3796818DA US 3796818 A US3796818 A US 3796818A
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US
United States
Prior art keywords
cylinder
rod
electrode
grippers
casing
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 - Lifetime
Application number
US00340951A
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English (en)
Inventor
I Yuasa
S Nonoyama
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.)
Daido Steel Co Ltd
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Daido Steel Co Ltd
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Filing date
Publication date
Application filed by Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
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Publication of US3796818A publication Critical patent/US3796818A/en
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    • 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
    • H05B7/14—Arrangements or methods for connecting successive electrode sections
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • An electrode connecting apparatus for furnaces comprises upper and lower casings slidably coupled to each other through a shock absorber, a lower gripping means provided on said lower casing, an upper gripping means provided on said upper casing, and a cylinder means for rotating said upper gripping means independently of said upper casing.
  • connection of a new electrode with an old electrode in a furnace was effected according to the following procedure.
  • Special clamping tools which can be manually operated are first mounted on the new and old electrodes respectively.
  • a few human operators get on the top of the furnace which is not convenient for them to work therein and manually rotate the clamping tools to connect the new electrode with the old electrode. They finally strike the new electrode against the old electrode with large hammers or the like to complete the connection of the new and old electrodes.
  • the electrode connecting apparatus has the advantage that a new electrode can be connected to an old electrode without any human operator being required to get on the top of the furnace.
  • the electrode connecting apparatus has the disadvantages that it is not possible to connect a new electrode to an old electrode while the old electrode is floated in any suitable position in a pool of melted steel so that the bottom of the arc furnace may be protected and that it is not necessarily possible to effect exact centering of the new and old electrodes.
  • an electrode connecting apparatus for use in furnaces, comprising clamping means for holding a new electrode, means for rotating the new electrode including a cylinder mechanism, a buffer for absorbing impact forces as caused when the new electrode is connected to an old electrode, and clamping means for holding the old electrode in the apparatus.
  • FIG. 1 is a longitudinally sectional view of an embodiment of the electrode connecting apparatus according to this invention as placed on a preparing base;
  • FIG. 2 is a longitudinally sectional view of the apparatus of FIG. 1, but placed over an old electrode;
  • FIG. 3 is a cross-sectional view of FIG. 1 as taken along the line A-A;
  • FIG. 4 is a cross-sectional view of FIG. 1 as taken along the line B-B.
  • the apparatus comprises upper and lower casings 4 and 5.
  • the upper and lower casings 4 and 5 are coupled to each other through shock absorbers 14 so that the lower casing 5 may be axially movable relative to the upper casing 4.
  • the shock absorbers 14 are secured between and to projecting members 26 and 27 provided on the lower casing 5, and the top parts 23 of the shock absorbers 14 are secured to a ring member 20 provided in the upper casing 4 by screwing bolts 22 or the like into threaded holes 21 of the ring member 20.
  • a sliding ring 6 is fitted onto the upper casing 4.
  • Cylinder means 7 is secured to the upper casing 4.
  • the forward portion 25 of the rod of the cylinder means 7 is connected to the sliding ring 6 through a pin 8 so that reciprocation of the rod of the cylinder means 7 may cause the sliding ring 6 to be rotated with respect to the upper casing 4 (see FIG. 3).
  • the sliding ring 6 is also provided with an upper gripping means. As shown in FIG.
  • the upper gripping means comprises a cylinder 9, a pair of grippers 11 and links 10 pivotally mounted on the sliding ring 6 through fixed pins 13, one of the links 10 being connected to one of the grippers 11 at one end thereof through a pin 12 and to one end of the cylinder 9 at the other end thereof, the other link 10 being connected to the other gripper 11 at one end thereof through another pin 12 and to the other end of the cylinder 9 at the other end thereof, thereby reciprocation of the rod of the cylinder 9 can cause the grippers 11 to be brought to an opened position or a closed position.
  • the shock absorbers 14 serves as a buffer for impact forces caused when the upper casing 4 is lowered.
  • the lower casing 5 is provided with lower gripping means. As shown in FIG.
  • the lower gripping means comprises a cylinder 15, a pair of grippers l7 and links 16 pivotally mounted on the ring 31 of the lower casing 5 through fixed pins 19, one of the links 16 being connected to one of the grippers 17 at one end thereof through a pin 18 and to one end of the cylinder 15 at the other end thereof, the other link 16 being connected to the other gripper 17 at one end thereof through another pin 18 and to the other end of the cylinder 15 at the other end thereof, thereby reciprocation of the rod of the cylinder 15 can cause the grippers 17 to be brought to an opened position or a closed positron.
  • the electrode connecting apparatus is first placed on a preparing base 3 which comprises a plate 3A and a raised block 38.
  • a new electrode 1 is lifted up by a crane or the like and then is inserted into the upper casing 4 until it puts on the preparing base 3 as shown in FIG. 1.
  • the upper gripping means is positioned. Delivery of pressurized oil into the clamping side of the cylinder 9 causes the grippers 11 to clamp the new electrode 1.
  • the clamping force can be adjusted by changing the pressure of oil delivered.
  • the electrode connecting apparatus with the new electrode is lifted up by a crane in such a way that it hang from the hook of the crane at the hook 32 thereof, and then is lowered toward the top of an old electrode 2 to which the new electrode is to be con nected. Then, the apparatus is further lowered so that it may be guided by the guide 31 thereof and may be fitted onto the old electrode 2.
  • the upper casing 4 will gravitate due to its own weight and the weight of the new electrode 1. Provision of the shock absorbers l4 enables the new electrode 1 to be slowly lowered toward the old electrode 2.
  • pressurized oil is delivered to the clamping side of the cylinder 15, thereby the old electrode 2 is clamped by the lower grippers 17.
  • pressurized oil is delivered to one side of the cylinder 7 to rotate the sliding ring 6 clockwise so that the new electrode 1 can be rotated through a predetermined angular distance, thereby the male screw 33 of the new electrode 1 can be screwed into the female screw 34.
  • pressurized oil is delivered to the returning side of the cylinder 9 to release clamping of the new electrode 1 by the upper grippers 11, and then pressurized oil is delivered to the other side of the cylinder 7 to return the rod of the cylinder 7 to its original position so that the sliding ring 6 can be reversely rotated through the predetermined angular distance.
  • pressurized oil is delivered to the returning sides of the cylinders 9 and to release clamping of the new and old electrodes by the grippers 11 and 17 respectively, and then the electrode connecting apparatus is lifted up by a crane until it is disengaged from the new electrode 1 and is finally placed on the preparing base 3.
  • the present apparatus has the following advantages: it is possible to securely effect connection of electrode by a constant clamping force; and it is possible to effect remote controlling by only one human operator, resulting in considerable reduction of labour cost. Therefore, the present apparatus will be greatly useful in industry.
  • Apparatus adapted to be disposed in a predetermined position over a furnace for connecting a new electrode carried in the apparatus to an old electrode in the furnace, comprising upper and lower casings slidably coupled to each other through a shock absorber, a lower gripping means, for gripping the old electrode, provided on said lower casing, an upper gripping means, for gripping the new electrode, provided on said upper casing, and means for rotating said upper gripping means independently of said upper casing.
  • said lower gripping means comprises a cylinder actuating means with a rod, a pair of grippers and links, a ring on said lower casing, said links being pivotally mounted on said ring of said lower casing through fixed pins, one of said links being connected to one of said grippers at one end thereof through another pin and to one end of said cylinder at the other end thereof, the other link being connected to the other gripper at one end thereof through still another pin and to said rod of said cylinder at the other end thereof, whereby reciprocation of said rod of said cylinder causes said grippers to be brought I to an opened position or a closed position.
  • said shock absorber includes a cylinder and rod, said cylinder of said shock absorber being mechanically connected to said lower casing and the outer end of said rod of said shock absorber is mechanically connected to said upper casing.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Resistance Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US00340951A 1972-03-16 1973-03-14 Electrode connecting apparatus for furnaces Expired - Lifetime US3796818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47026151A JPS5246366B2 (ja) 1972-03-16 1972-03-16

Publications (1)

Publication Number Publication Date
US3796818A true US3796818A (en) 1974-03-12

Family

ID=12185519

Family Applications (1)

Application Number Title Priority Date Filing Date
US00340951A Expired - Lifetime US3796818A (en) 1972-03-16 1973-03-14 Electrode connecting apparatus for furnaces

Country Status (5)

Country Link
US (1) US3796818A (ja)
JP (1) JPS5246366B2 (ja)
DE (1) DE2312968C2 (ja)
FR (1) FR2176156B1 (ja)
GB (1) GB1414750A (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898364A (en) * 1974-09-05 1975-08-05 Stanford A Hardin Combined suspension device for holding, contacting, slipping and torquing electric furnace electrodes
US3937867A (en) * 1974-09-23 1976-02-10 Lectromelt Corporation Coupler for electric furnace electrodes
US4185158A (en) * 1976-12-20 1980-01-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other
US4665530A (en) * 1983-04-07 1987-05-12 Eric Corbethau Apparatus for replacing the electrodes of electric arc furnaces
US4736384A (en) * 1985-12-23 1988-04-05 Kyoei Steel Ltd. Electrode adding apparatus
US6167076A (en) * 2000-03-16 2000-12-26 Nucor Corporation Electrode wrench
US20060050757A1 (en) * 2002-09-20 2006-03-09 Pyromet Proprietary Products (Pty) Limited Arc furnace electrode length determination
CN104654806A (zh) * 2015-02-14 2015-05-27 攀钢集团工程技术有限公司 冶金电炉的石墨电极接长机构
US9841334B1 (en) 2014-04-22 2017-12-12 Contractors & Industrial Supply Company, Inc. Electrode torque measurement device
US9850105B1 (en) 2015-05-04 2017-12-26 Contractors & Industrial Supply Company, Inc. Vertical automatic addition tong apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5640819Y2 (ja) * 1974-11-07 1981-09-24
US4044199A (en) * 1975-06-10 1977-08-23 Union Carbide Corporation Apparatus for applying torque to electrodes
DE3016350C2 (de) * 1980-04-28 1984-06-20 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Vorrichtung zum vorübergehenden Festklemmen einer Graphitelektrode
DE3129602C1 (de) * 1981-07-28 1983-01-27 Korf & Fuchs Systemtechnik GmbH, 7601 Willstätt Vorrichtung zum Annippeln einer Graphitelektrode an eine Dauerelektrode eines Elektroofens
FR2544059B1 (fr) * 1983-04-07 1985-06-28 Corbethau Eric Machine a rabouter les electrodes de fours a arc electrique
FR2562223B2 (fr) * 1984-03-30 1988-12-30 Corbethau Eric Machine a rabouter les electrodes de fours a arc electrique
JPH0518874Y2 (ja) * 1986-10-30 1993-05-19

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578473A (en) * 1939-08-23 1946-07-01 Commentry Fourchambault Et Dec Apparatus for screwing together the electrodes of electric arc furnaces
DE1080708B (de) * 1954-12-07 1960-04-28 Siemens Planiawerke Ag Schraubvorrichtung fuer Gewindeverbindungen zum Anstueckeln von Kohle-oder Graphitelektroden
DE976617C (de) * 1948-06-15 1964-01-02 Johannes Dr-Ing Wotschke Metallmantelelektrode

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899477A (en) * 1959-08-11 Safety device for remotely controlled manipulators
FR862448A (fr) * 1939-08-23 1941-03-06 Commentry Fourchambault & Deca Appareil à bloquer les électrodes des fours électriques à arc
DE1061457B (de) * 1957-02-23 1959-07-16 Demag Elektrometallurgie Gmbh Haltevorrichtung fuer Nippelelektroden an Lichtbogen- und Reduktionsoefen
US3626573A (en) * 1970-01-15 1971-12-14 Lake Ontario Steel Co Ltd Electrode handling device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578473A (en) * 1939-08-23 1946-07-01 Commentry Fourchambault Et Dec Apparatus for screwing together the electrodes of electric arc furnaces
DE976617C (de) * 1948-06-15 1964-01-02 Johannes Dr-Ing Wotschke Metallmantelelektrode
DE1080708B (de) * 1954-12-07 1960-04-28 Siemens Planiawerke Ag Schraubvorrichtung fuer Gewindeverbindungen zum Anstueckeln von Kohle-oder Graphitelektroden

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898364A (en) * 1974-09-05 1975-08-05 Stanford A Hardin Combined suspension device for holding, contacting, slipping and torquing electric furnace electrodes
US3937867A (en) * 1974-09-23 1976-02-10 Lectromelt Corporation Coupler for electric furnace electrodes
US4185158A (en) * 1976-12-20 1980-01-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other
US4665530A (en) * 1983-04-07 1987-05-12 Eric Corbethau Apparatus for replacing the electrodes of electric arc furnaces
US4736384A (en) * 1985-12-23 1988-04-05 Kyoei Steel Ltd. Electrode adding apparatus
US6167076A (en) * 2000-03-16 2000-12-26 Nucor Corporation Electrode wrench
US20060050757A1 (en) * 2002-09-20 2006-03-09 Pyromet Proprietary Products (Pty) Limited Arc furnace electrode length determination
US7095777B2 (en) * 2002-09-20 2006-08-22 Pyromet Proprietary Products (Pty) Limited Arc furnace electrode length determination
US9841334B1 (en) 2014-04-22 2017-12-12 Contractors & Industrial Supply Company, Inc. Electrode torque measurement device
US9844104B1 (en) 2014-04-22 2017-12-12 Contractors & Industrial Supply Company, Inc. Electrode joining apparatus
US9930733B1 (en) 2014-04-22 2018-03-27 Contractors & Industrial Supply Company, Inc. Electrode joint spacer
US10028338B1 (en) 2014-04-22 2018-07-17 Contractors & Industrial Supply Company, Inc. Electrode torque lift
CN104654806A (zh) * 2015-02-14 2015-05-27 攀钢集团工程技术有限公司 冶金电炉的石墨电极接长机构
CN104654806B (zh) * 2015-02-14 2016-04-13 攀枝花攀钢集团设计研究院有限公司 冶金电炉的石墨电极接长机构
US9850105B1 (en) 2015-05-04 2017-12-26 Contractors & Industrial Supply Company, Inc. Vertical automatic addition tong apparatus

Also Published As

Publication number Publication date
DE2312968A1 (de) 1973-10-04
GB1414750A (en) 1975-11-19
JPS4894029A (ja) 1973-12-04
JPS5246366B2 (ja) 1977-11-24
FR2176156A1 (ja) 1973-10-26
DE2312968C2 (de) 1982-12-09
FR2176156B1 (ja) 1977-12-30

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