EP0054299A1 - Kupplungsvorrichtung für Elektroden für Lichtbogenöfen - Google Patents

Kupplungsvorrichtung für Elektroden für Lichtbogenöfen Download PDF

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Publication number
EP0054299A1
EP0054299A1 EP81110446A EP81110446A EP0054299A1 EP 0054299 A1 EP0054299 A1 EP 0054299A1 EP 81110446 A EP81110446 A EP 81110446A EP 81110446 A EP81110446 A EP 81110446A EP 0054299 A1 EP0054299 A1 EP 0054299A1
Authority
EP
European Patent Office
Prior art keywords
coupling device
electrode
locking
connecting element
housing
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.)
Ceased
Application number
EP81110446A
Other languages
German (de)
English (en)
French (fr)
Inventor
Günther Vielstich
Hanns-Georg Dr. Bauer
Josef Mühlenbeck
Josef Dr. Otto
Horst Feldhoff
Dieter H. Dr. Zöllner
Friedrich Rittmann
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.)
Arc Technologies Systems Ltd
Original Assignee
Arc Technologies Systems Ltd
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 Arc Technologies Systems Ltd filed Critical Arc Technologies Systems Ltd
Publication of EP0054299A1 publication Critical patent/EP0054299A1/de
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • 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
    • 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

Definitions

  • the invention relates to a coupling device for attaching electrodes for arc furnaces to a hoist.
  • electrodes In arc furnaces, in particular for the production of electrical steel, electrodes are used which are particularly heavy in the case of large vessel sizes. Such electrodes can therefore only be handled using a heavy lifting device, in particular portal cranes.
  • the respective electrode is taken directly onto the hook of the hoist by means of a connecting element. Both the attachment of the electrode to the hoist and the removal of the electrode from the hoist are carried out by an operator who either hooks the hook of the hoist into the connection element of the electrode or unhooks the hook again from the connection element of the electrode.
  • Even in the normal transport of heavy goods by means of a hoist connecting the heavy goods to the hook and releasing this good from the hook is difficult and, moreover, dangerous work.
  • this task is made considerably more difficult for the operator.
  • this electrode To use a new electrode in an electric arc furnace, this electrode must be inserted through an opening in the lid in the middle of the hoist. After inserting the electrode into the opening of the lid, a worker must then climb the portal of the furnace and release the hook of the lifting device from the newly inserted electrode.
  • the described replacement of the electrodes takes about 5-10 minutes.
  • An electrode must be used several times within a layer, e.g. five to six times.
  • the entire remaining transport of the electrodes by means of a suitable lifting device is extremely time-consuming.
  • the invention is therefore based on the object of providing a device which allows electrodes to be coupled automatically to the relevant lifting device, so that the entire handling of the electrodes can be carried out not only much faster, but also for humanization heavy and dangerous manual labor is avoided in the world of work.
  • a coupling device for attaching electrodes for arc furnaces to a Hoist dissolved which is characterized because the coupling device ß a controllable locking device for the releasable engagement with a connector element to an electrode, further comprising an introducer assembly for moving the connector element of an electrode to the locking device and a movable for shock absorption in use direction relative to the locking device hitch for hanging the coupling device on the hoist.
  • the coupling device according to the invention allows electrodes to be quickly connected to the hook of a hoist, the manual operation of the hook of the hoist being dispensed with after the coupling device is arranged on the hook of the hoist and by means of this coupling device the respective electrode being put on the hook and again by the latter can be solved.
  • This makes it possible to quickly and easily insert new electrodes into an arc melting furnace, add the electrodes and remove the used electrodes. without manual work in the area of the arc furnace.
  • the coupling device has a controllable locking device, by actuating which the electrode can be connected to or released from the hook of the hoist, whereby the control of this locking device can be achieved automatically or by remote control by hand.
  • the coupling device according to the invention also has an insertion arrangement by means of which the connecting element of the electrode is forcibly guided in the area of the locking device.
  • the operator of the hoist therefore only has to lower the coupling device approximately in the area of the connecting element of an electrode, whereupon the coupling device or its locking device automatically centers itself with respect to the connecting element when the coupling device is lowered further, so that the locking device of the coupling device engages securely arrives with the connecting element of the electrode.
  • the coupling device according to the invention has a hitch device that is movable relative to the locking device for shock absorption in the direction of use.
  • the coupling device expediently comprises a housing in which the essential components are installed.
  • the components of the coupling device are reliably protected despite the rough and dusty operation during steel production.
  • the locking device can be controlled pneumatically or hydraulically.
  • the control can, as will be described in more detail, take place when the coupling device is placed on the electrode or when the coupling device is detached from the electrode due to this process itself or by remote control by an operator, e.g. the leader of the hoist.
  • a particularly simple construction of the actual locking device is obtained if it comprises a locking bolt which is movable perpendicularly to the direction of use from an open position to a locking position and vice versa. This not only makes the locking device itself particularly simple and reliable, but it also results in an unproblematic constructive design of the connection element of the respective electrode. '
  • This locking bolt is expediently movable via a pneumatic or hydraulic actuating cylinder, which allows the control options described.
  • the actuating cylinder is arranged in the housing above the locking bolt and parallel to it.
  • the actuating cylinder can be actuated via a control device such that when the coupling device is placed on the connecting element of an electrode, the locking bolt moves from the open position into the locking position is, in the presence of a tensile force on the coupling device, the locking bolt is locked in the locking position and / or is moved in the traction-free state or when the traction force falls below a certain minimum value of the locking bolt from the locking position into the open position.
  • the control device can, when the coupling device is placed on the connecting element of an electrode, the control pulse which, by means of the control device via the actuating cylinder, triggers the locking bolt from the Moving the open position into the locked position is obtained in any way.
  • the control pulse which, by means of the control device via the actuating cylinder, triggers the locking bolt from the Moving the open position into the locked position is obtained in any way.
  • the coupling device according to the invention should be able to be released automatically, ie without an operator approaching the coupling device.
  • This too The task can be accomplished depending on the pulling force, in that the locking bolt is moved from the locking position into the open position only when the pulling force is free or when the pulling force falls below a certain minimum value.
  • the tensile force acting on the coupling device can be measured in any way and used to initiate relevant control commands for the locking device.
  • the control device for the actuating cylinder with the spring arrangement of the hanger can be used for the above-mentioned purpose work together.
  • the control device scans the state of the spring arrangement in order to detect the tensile force acting on the coupling device and to generate the control command for the locking device as a function thereof.
  • a particularly simple design of the E in arrangementsan- order for the connector element of an electrode in the coupling device is d ate this introduction arrangement from a in the direction of insertion of the connector element of an electrode in the coupling device tapering, funnel-shaped W andungselement of the housing is formed.
  • This funnel-shaped tapering wall element can be formed in one piece with the housing.
  • the bearing for the actuating cylinder of the locking device can also be connected.
  • the A is n strainbügel rotatably connected to the housing about an axis parallel to the insertion direction axis.
  • a preferably operable stop for limiting the rotation of the hanger is provided in relation to the housing. This configuration makes it possible to also use the coupling device to screw a new active part directly onto the lower end of a partially used electrode by means of a screw nipple with the hoist.
  • connector element to the electrode about its axis is rotatably connected and d ate preferably operable to stop Drehwe g SBE limitation of the connecting element with respect to the electrode.
  • g e-Maessen coupling device are unnecessary special Devices for connecting a new active part to the lower end of a partially used electrode, since the coupling device, in cooperation with the lifting device, can be used directly for the screwing process.
  • the connecting element is connected to the electrode via a screw nipple.
  • the connecting element and screw nipple can be detached from this used electrode and used with a new electrode.
  • the coupling device according to the invention is then particularly suitable for transporting graphite and combination electrodes, for inserting and removing such electrodes in and out of holding devices in the cover of an electric arc furnace, for repositioning such electrodes in the furnace and for screwing one new active part with a used active part or the metal shaft of combination electrodes.
  • this coupling device comprises a housing 1 in the form of a pipe section.
  • this housing 1 the essential components of the coupling device are largely protected from the harsh operation in steel production.
  • a wall element 2 is welded, the inner surfaces 2a of which form a funnel-shaped upward insertion for a connecting element of an electrode to be described in more detail.
  • two locking bores 3 are also provided, the axes 3a of which are aligned with one another and perpendicular to the axis A, which also represents the direction of use.
  • a bearing housing 4 is supported, in which an actuating cylinder, designated 5, of a pneumatic or hydraulic type is mounted.
  • an actuating cylinder designated 5 of a pneumatic or hydraulic type is mounted.
  • a flange 5a of the actuating cylinder 5 is screwed to a wall 4a of the bearing housing parallel to the axis A, while the actuating cylinder 5 is additionally supported on the wall 4b of the bearing housing 4 parallel to the wall 4a.
  • housing 1 has an assembly opening 1a.
  • the piston rod 5b of the actuating cylinder 5 is connected at the end via a crossbar 6 parallel to the axis A by means of a locking bolt 7, the axis of which extends perpendicular to the axis A and is aligned with the axes 3a of the locking bores 3, so that the locking bolt 7 is inserted into the locking bores 3 can and is stored in this position through the locking holes 3.
  • a mounting opening 1b is provided in the housing 1.
  • the actuating cylinder 5 To actuate the actuating cylinder 5, i.e. for pushing the piston back and forth and thus the piston rod 5b and the locking bolt 7, the actuating cylinder 5 is in the usual way with a control arrangement, e.g. a solenoid valve arrangement, 8 connected.
  • a control arrangement e.g. a solenoid valve arrangement, 8 connected.
  • the hitch of the present coupling device comprises a U-shaped hanger 9, the legs of which engage through openings 10 in the housing 1.
  • the free ends of the legs are screwed to a lifting plate 10 by means of screws 12.
  • Each lifting plate 1.1 is supported by two compression springs 13, each of which is guided by a spring pin 14, on a respective support plate 15, each of which is rigid with the housing 1, e.g. by welding. So that the hanger 9 in the axial direction A, i.e. movable in the direction of use relative to the housing 1 and the tensile force exerted on the coupling device is absorbed by the compression springs 13.
  • one of the compression springs 13 is assigned a measuring and control device 16, shown only schematically, so that the actuating cylinder 5 can be controlled accordingly as a function of the tensile force via the control arrangement 8.
  • the respective electrode has the connection arrangement shown in FIG. 4.
  • This includes a tab-shaped connecting element 20, in which an opening 21 is provided, which, as will be described in more detail below, serves to receive the locking bolt 7 of the coupling device.
  • This connecting element 20 is rotatably connected to a screw nipple 21 'with a conical external thread 21a.
  • the connection element 20 merges into a bolt 20a, which is inserted into a bearing sleeve 21b, which is arranged centrally in an end plate 21c of the screw nipple 21.
  • a securing bolt 21d is provided, which is inserted through a bore in a securing ring 21e and at the same time through a bore through the bolt 20a of the connecting element 20.
  • a stop (not shown) is provided between the two elements, as a result of which a rotationally fixed connection is produced between the connecting element 20 and the screw nipple 21 after a certain rotational movement.
  • connection arrangement according to Fig. 4 is in the upper end face of an electrode, e.g. the metal shaft of a combination electrode.
  • the coupling device is hooked into the hook of a hoist by means of the hanger 9.
  • the lifting device lowers the coupling device onto an electrode provided with a connection arrangement according to FIG. 4 such that the connection element 20 slides into the funnel-shaped insertion arrangement 2, 2a, for which purpose the locking bolt 7 is in its open position shown in FIG. 1.
  • the locking bolt 7 is inserted into the two bores 3 and the opening 21 of the connecting element 20, for which purpose the piston of the actuating cylinder 5 is shifted accordingly.
  • the corresponding activation of the actuating cylinder 5 can either take place via a sensor actuated when the connecting element 20 is inserted into the funnel-shaped insertion arrangement 2, or remotely controlled by the operator of the lifting device.
  • the measuring and control device 16 prevents unintentional loosening of the coupling device by moving the locking bolt 7 from the described locking position into the open position.
  • the coupling device can again be removed from the Electrode are loosened.
  • the actuating cylinder 5 is controlled accordingly, so that the locking bolt 7 is pushed from the locking position into the open position.
  • This control of the actuating cylinder 5 can either take place via a remote control line by the person operating the lifting device or, depending on the tractive force, can be effected by a pulse generated by the measuring and control device 16.
  • the rotatable arrangement of the connecting element 20 in the screw nipple 21 and the rotation path limit provided thereby serve to screw a new active part onto the lower end of a used electrode or onto the metal shaft of a combination electrode by means of the coupling device, since the arrangement described enables the electrode directly by rotating the hoist.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP81110446A 1980-12-17 1981-12-15 Kupplungsvorrichtung für Elektroden für Lichtbogenöfen Ceased EP0054299A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803047620 DE3047620A1 (de) 1980-12-17 1980-12-17 Kupplungsvorrichtung fuer elektroden fuer lichtbogenoefen
DE3047620 1980-12-17

Publications (1)

Publication Number Publication Date
EP0054299A1 true EP0054299A1 (de) 1982-06-23

Family

ID=6119421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110446A Ceased EP0054299A1 (de) 1980-12-17 1981-12-15 Kupplungsvorrichtung für Elektroden für Lichtbogenöfen

Country Status (16)

Country Link
US (1) US4441190A (es)
EP (1) EP0054299A1 (es)
JP (1) JPS57128484A (es)
KR (1) KR830008142A (es)
CA (1) CA1173483A (es)
DD (1) DD201934A5 (es)
DE (1) DE3047620A1 (es)
DK (1) DK553481A (es)
ES (1) ES8302997A1 (es)
FI (1) FI813870L (es)
HU (1) HU186449B (es)
NO (1) NO814094L (es)
PL (1) PL234252A1 (es)
PT (1) PT74146B (es)
SU (1) SU1172457A3 (es)
ZA (1) ZA818360B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080084907A1 (en) * 2006-10-06 2008-04-10 David Arthur Lehr Cushioned Lifting Apparatus and Method of Lifting Carbon Based Electrodes
EP3914550A4 (en) * 2019-01-24 2022-10-12 Exo Technologies LLC DEVICE FOR LIFTING GRAPHITE ELECTRODES

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE15049C (de) * Hagans in Erfurt Zentralbuffer für Eisenbahnwagen
US824153A (en) * 1904-05-03 1906-06-26 Willson Aluminum Company Carbon-holder for electric furnaces.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA730228A (en) * 1966-03-15 Crucible Steel Company Of America Electrode clamp
FR350833A (fr) * 1905-01-18 1905-06-27 Electrometallurgique Procedes Pince porte-électrodes
DE422777C (de) * 1924-04-04 1925-12-14 Siemens & Halske Akt Ges Elektrodenfassung fuer elektrische OEfen
US3526699A (en) * 1969-03-03 1970-09-01 Lombard Corp Apparatus for connecting ram to electrode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE15049C (de) * Hagans in Erfurt Zentralbuffer für Eisenbahnwagen
US824153A (en) * 1904-05-03 1906-06-26 Willson Aluminum Company Carbon-holder for electric furnaces.

Also Published As

Publication number Publication date
DK553481A (da) 1982-06-18
PL234252A1 (es) 1982-07-05
PT74146A (de) 1982-01-01
CA1173483A (en) 1984-08-28
SU1172457A3 (ru) 1985-08-07
ES508639A0 (es) 1982-12-01
DD201934A5 (de) 1983-08-17
HU186449B (en) 1985-07-29
US4441190A (en) 1984-04-03
KR830008142A (ko) 1983-11-16
ES8302997A1 (es) 1982-12-01
NO814094L (no) 1982-06-18
DE3047620A1 (de) 1982-07-22
PT74146B (de) 1983-07-21
ZA818360B (en) 1982-10-27
JPS57128484A (en) 1982-08-10
FI813870L (fi) 1982-06-18

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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ITCL It: translation for ep claims filed

Representative=s name: PROF. FRANCO CICOGNA

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Owner name: ARC TECHNOLOGIES SYSTEMS, LTD.

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Effective date: 19821126

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18R Application refused

Effective date: 19860329

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VIELSTICH, GUENTHER

Inventor name: FELDHOFF, HORST

Inventor name: RITTMANN, FRIEDRICH

Inventor name: BAUER, HANNS-GEORG, DR.

Inventor name: OTTO, JOSEF, DR.

Inventor name: ZOELLNER, DIETER H., DR.

Inventor name: MUEHLENBECK, JOSEF