EP3102001A1 - Cable de courant haute intensite et dispositif d'alimentation pour fours electriques - Google Patents

Cable de courant haute intensite et dispositif d'alimentation pour fours electriques Download PDF

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Publication number
EP3102001A1
EP3102001A1 EP16171141.1A EP16171141A EP3102001A1 EP 3102001 A1 EP3102001 A1 EP 3102001A1 EP 16171141 A EP16171141 A EP 16171141A EP 3102001 A1 EP3102001 A1 EP 3102001A1
Authority
EP
European Patent Office
Prior art keywords
current
cable
current conductor
conductor
cable according
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
EP16171141.1A
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German (de)
English (en)
Other versions
EP3102001B1 (fr
Inventor
Arndt Dung
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.)
Individual
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Individual
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Publication date
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Priority to PL16171141T priority Critical patent/PL3102001T3/pl
Publication of EP3102001A1 publication Critical patent/EP3102001A1/fr
Application granted granted Critical
Publication of EP3102001B1 publication Critical patent/EP3102001B1/fr
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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
    • H05B7/11—Arrangements for conducting current to the electrode terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/001—Power supply cables for the electrodes of electric-welding apparatus or electric-arc furnaces

Definitions

  • the invention relates to a feeding device for electrically operated furnaces for electroslag remelting and reduction furnaces.
  • High-current cables are known in various embodiments from the prior art.
  • corresponding high-current cables are used, in particular, for connecting the secondary side of a transformer of a corresponding high current system to an electrode or a support arm for an electrode of a ladle or electric arc furnace or another component operated with high current.
  • Smaller ladle furnaces typically have three phases and are connected with two high current cables per phase. Larger ovens usually use four or more high current cables per phase.
  • the known from the prior art high-current cable of the type mentioned usually have a conductor made of copper or a copper alloy due to the good conductivity and deformability. Also, the cable head and the electrode support arm are at least partially formed of copper or a corresponding alloy.
  • the disadvantage here is, on the one hand, the comparatively high weight, which is accompanied by a difficult handling of the comparatively bulky cables and, due to the high tensile forces, an increased susceptibility to wear of the heavy, freely suspended cables especially at the head ends.
  • the invention has for its object to provide a high current cable for electrically conductive contacting an electrode support arm of an electric arc furnace, which has a good conductivity, but is stable and inexpensive to produce.
  • the high-current cable surrounding an insulating sheath for the electrically conductive contacting of an electrode support arm of an arc furnace has a high-current conductor made of aluminum or an aluminum alloy.
  • a cable head connected to the high-current conductor at at least one cable end is also formed according to the invention from aluminum or an aluminum alloy.
  • the high-current cable according to the invention is nevertheless characterized by a low overall weight. In addition to a simplified handling, this factor leads to a reduction in the tensile forces of the cable at the head ends, resulting in an improved creep strength of the high-current line. Also priced the high current cable with aluminum conductor is superior to the copper cable.
  • the inventive design of the cable head made of aluminum or an aluminum alloy contributes significantly to reducing the susceptibility to wear.
  • the high-current cable can initially be configured in any desired manner.
  • the high-current cable can be formed from only one electrical line element.
  • the high-current conductor has at least two or more individual conductors, which are formed from aluminum or an aluminum alloy.
  • the high-current conductor or the individual conductors can have any desired shape and, in particular, any desired cross-section.
  • the high current conductor or the individual conductors are preferably formed with a round cross section.
  • the high current conductor has a cross section of 100 to 7,500 mm 2 , preferably 1,000 to 6,000 mm 2, and / or the individual conductors have a cross section of 10 to 1,000 mm 2 , preferably 100 to 600 mm.
  • the individual conductors can be arranged arbitrarily to one another. They may abut each other and / or be twisted or spaced apart.
  • each individual conductor is surrounded by a coaxially arranged sheathing, wherein the sheath is formed from any material or composite material that does not conduct electricity, in particular a plastic, a rubber compound or a lacquer.
  • the sheath is u. a. for spacing the individual conductors from each other and reducing their friction to each other.
  • the high-current cable can be used uncooled, that is without a cooling medium surrounding the conductor.
  • the cable is cooled, in particular liquid-cooled.
  • the high-current conductor is arranged within a cooling liquid arranged in the jacket.
  • coolant any fluids or fluid mixtures can be used, which ensure improved heat dissipation.
  • the fluids may also be provided with additives, for example with corrosion protection additives.
  • connection of the at least one Cable end of the high current conductor to a cable head done arbitrarily.
  • the connection can be made cohesively, for example by soldering or welding.
  • the cable head is positively connected to the high-current conductor and more preferably compressed.
  • the sheath can also be included in compression.
  • the jacket in the compressed area is also sealed against leakage of the cooling liquid.
  • the high-current cable follows the lowering, lifting and pivoting of the electrode support arm.
  • the connecting portion between the high current conductor and the cable head is exposed to strong tensile, compression and torsional stresses.
  • the non-positive connection between high-current conductor and cable head is amplified according to a preferred embodiment of the invention by a positive and / or cohesive connection.
  • the cable head for this purpose in the direction of the high-current conductor protruding projections, which are further preferably formed by mandrels and / or rings. These projections dig into the surface of the high-current conductor in a form-fitting manner during pressing.
  • a pressure-induced flow of the aluminum also lead to a cohesive connection between the cable head and high-current conductor.
  • the sheath of the high-current cable can be formed of any material.
  • the sheath is designed such that no liquid can escape.
  • the sheath can be formed in one layer from, for example, a plastic or rubber material.
  • the sheath may also consist of a multi-layer composite, wherein at least one layer is liquid-tight and at least one other layer other functional properties, such as a reinforcement for protection against external influences exercises.
  • the sheath is through a flexible hose educated.
  • the flexible design of the hose improves the mobility of the high-current cable.
  • such hoses need not be specially made, but can be selected in accordance with their requirement profile in terms of cross-section, compressive strength and material cost of the wide range available on the market hoses.
  • the flexible hose must therefore be pulled only coaxially over the high-current conductor and then connected to the hose ends with this possibly liquid and pressure-tight.
  • the connection between hose and high-current conductor can be made as desired.
  • the tube cohesively, z. B. by gluing, and / or non-positively, for. B. be connected by means of a hose clamp to the high current conductor.
  • the tube is crimped at least at one end together with the high current conductor and / or the cable head.
  • a feeding device for an electric arc furnace with a high current cable connected to the electrode support arm in addition to the high-current conductor and the at least one cable head and the electrode arm made of aluminum or an aluminum alloy.
  • the electrode arm constitutes a not insignificant proportion of the feed device
  • the weight and not least the material costs for the entire feed device are significantly reduced.
  • the susceptibility to contact corrosion at the feeder and in particular at the electrical contact points between high current conductor and cable head on the one hand and cable head and electrode arm on the other hand is also significantly reduced.
  • the high-current cable 1 has a high-current conductor 2, which is formed by a plurality of individual conductors 5 made of aluminum, of which three individual conductors 5 are exemplified here.
  • the individual conductors 5 are surrounded by an insulation 6 coaxially.
  • the embodiment illustrated is a liquid-cooled high-current cable 1.
  • the individual conductors 5 having an insulation 6 are arranged spaced apart from one another within a jacket 3 filled with a cooling liquid 7 or through which cooling liquid 7 flows.
  • the casing 3 is provided with connections 8 for the supply and discharge of the cooling liquid 7, wherein in Fig. 1 due to the perspective view, only one terminal 8 is visible.
  • the high-current cable 1 in the illustrated embodiment a cable head 4 made of aluminum, which is connected to the high-current conductor 2 and the sheath 3.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Conductive Materials (AREA)
  • Furnace Details (AREA)
  • Electrolytic Production Of Metals (AREA)
EP16171141.1A 2015-06-03 2016-05-24 Cable de courant haute intensite et dispositif d'alimentation pour fours electriques Active EP3102001B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16171141T PL3102001T3 (pl) 2015-06-03 2016-05-24 Kabel wysokoprądowy i urządzenie zasilające do elektrycznie zasilanych pieców

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015108815.0A DE102015108815B3 (de) 2015-06-03 2015-06-03 Hochstromkabel zur elektrisch leitenden Kontaktierung eines Elektrodentragarms eines elektrisch betriebenen Ofens sowie Einspeisevorrichtung für elektrisch betriebene Öfen

Publications (2)

Publication Number Publication Date
EP3102001A1 true EP3102001A1 (fr) 2016-12-07
EP3102001B1 EP3102001B1 (fr) 2020-07-08

Family

ID=56083957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16171141.1A Active EP3102001B1 (fr) 2015-06-03 2016-05-24 Cable de courant haute intensite et dispositif d'alimentation pour fours electriques

Country Status (4)

Country Link
EP (1) EP3102001B1 (fr)
DE (1) DE102015108815B3 (fr)
ES (1) ES2819523T3 (fr)
PL (1) PL3102001T3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1336823A (fr) * 1962-07-25 1963-09-06 Aluminum Francais L Bras en alliage léger pour four électrique
US3255300A (en) * 1963-12-19 1966-06-07 Anaconda Wire & Cable Co Electric furnace cable
FR1483131A (fr) * 1965-06-10 1967-06-02 Asea Ab Système de conducteurs pour les fours à arcs
US3433878A (en) * 1965-06-10 1969-03-18 Asea Ab Line transmission in arc furnaces
DE19621672A1 (de) * 1996-05-30 1997-12-04 Km Europa Metal Ag Anordnung zur Übertragung der elektrischen Energie von einem Ofentransformator zu den Elektroden eines Drehstrom-Lichtbogenofens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443574A1 (de) * 1984-11-29 1986-05-28 Fuchs Systemtechnik GmbH, 7601 Willstätt Lichtbogenofen
DE3629310A1 (de) * 1986-08-28 1988-03-10 Transformatoren Union Ag Hochstromleiter fuer sondertransformatoren
EP1958725B1 (fr) * 2007-02-15 2012-07-25 Arndt Dung Assemblage du tuyau d'un câble pour courant de haute intensité refroidi à l'eau avec la tête de câble massive

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1336823A (fr) * 1962-07-25 1963-09-06 Aluminum Francais L Bras en alliage léger pour four électrique
US3255300A (en) * 1963-12-19 1966-06-07 Anaconda Wire & Cable Co Electric furnace cable
FR1483131A (fr) * 1965-06-10 1967-06-02 Asea Ab Système de conducteurs pour les fours à arcs
US3433878A (en) * 1965-06-10 1969-03-18 Asea Ab Line transmission in arc furnaces
DE19621672A1 (de) * 1996-05-30 1997-12-04 Km Europa Metal Ag Anordnung zur Übertragung der elektrischen Energie von einem Ofentransformator zu den Elektroden eines Drehstrom-Lichtbogenofens

Also Published As

Publication number Publication date
ES2819523T3 (es) 2021-04-16
PL3102001T3 (pl) 2020-12-28
DE102015108815B3 (de) 2016-10-27
EP3102001B1 (fr) 2020-07-08

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