EP3102001B1 - 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
EP3102001B1
EP3102001B1 EP16171141.1A EP16171141A EP3102001B1 EP 3102001 B1 EP3102001 B1 EP 3102001B1 EP 16171141 A EP16171141 A EP 16171141A EP 3102001 B1 EP3102001 B1 EP 3102001B1
Authority
EP
European Patent Office
Prior art keywords
high current
cable
current
current conductor
conductor
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.)
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Application number
EP16171141.1A
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German (de)
English (en)
Other versions
EP3102001A1 (fr
Inventor
Arndt Dung
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Individual
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Priority to PL16171141T priority Critical patent/PL3102001T3/pl
Publication of EP3102001A1 publication Critical patent/EP3102001A1/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 further relates to a feed device for electrically operated furnaces for electro-slag remelting processes and reduction furnaces.
  • High current cables are known in a variety of configurations from the prior art. Corresponding high-current cables are used in particular to connect 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 ovens typically have three phases and are connected with two high-current cables per phase. Larger ovens typically use four or more high current cables per phase.
  • the high-current cables of the type mentioned known from the prior art generally have a conductor made of copper or a copper alloy due to the good conductivity and deformability.
  • the cable head and also the electrode support arm are at least partially made of copper or a corresponding alloy.
  • the disadvantages here are the comparatively high weight, which is associated with a difficult handling of the comparatively bulky cables and, due to the high tensile forces, an increased susceptibility to wear of the heavy, free-hanging cables leads especially at the head ends.
  • the invention has for its object to provide a high-current cable for electrically contacting an electrode support arm of an arc furnace, which has good conductivity, but is still stable and inexpensive to manufacture.
  • the document FR 1336823 discloses an electrically conductive electrode support arm made of a light metal, which is provided with coolant lines in the longitudinal direction.
  • the electrode support arm is provided on the side facing away from the electrode by means of metal plates.
  • high-current aluminum cables are provided, which are either soldered directly to the plates or received in connection sleeves arranged on the plates.
  • the high-current cable with an insulating sheath for 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 on at least one cable end is also formed from aluminum or an aluminum alloy.
  • the high-current cable according to the invention is nevertheless distinguished by a low overall weight. In addition to simplified handling, this factor leads to a reduction in the tensile forces of the cable at the head ends, which results in an improved fatigue strength of the high-current line.
  • the high-current cable with aluminum conductor is also superior in price 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.
  • a pairing of metals of different electronegativities is deliberately avoided and therefore advantageous avoided electrochemical contact corrosion.
  • a high-current cable is basically understood to mean any cable that is suitable for carrying a high-voltage current.
  • the high-current cable can initially be configured in any manner.
  • the high-current cable can thus 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 shape and in particular any cross-section.
  • the high-current conductor or the individual conductors are preferably designed with a round cross section.
  • the high-current conductor has a total 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 2 .
  • the individual conductors can be arranged in any way relative to one another. They can rest against one another and / or be twisted or be arranged at a distance from one another. Each individual conductor is preferably surrounded by a coaxially arranged sheathing, the sheathing being formed from any material or composite material that does not conduct current, in particular a plastic, a rubber compound or a lacquer.
  • the casing serves u. a. to separate the individual conductors from one another and reduce their friction against one another.
  • the high-current cable can be used uncooled, i.e. 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 casing. Any fluids or fluid mixtures which ensure improved heat dissipation can be used as the cooling liquid.
  • the fluids can also be provided with additives, for example with anti-corrosion additives.
  • connection of the at least one Cable end of the high-current conductor to any cable head can be cohesive, for example by soldering or welding.
  • the cable head is non-positively connected to the high-current conductor and is further preferably pressed.
  • the casing can also be included in the pressing.
  • the sheathing in the pressed area is also sealed against leakage of the coolant.
  • the high-current cable follows the lowering, lifting and swiveling of the electrode support arm.
  • the connecting section between the high-current conductor and the cable head is particularly exposed to strong tensile, compressive and torsional stresses.
  • the non-positive connection between high-current conductor and cable head is strengthened according to a preferred development of the invention by a positive and / or material connection.
  • the cable head has projections in the direction of the high-current conductor, 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. If necessary, a pressure-related flow of the aluminum can also lead to a material connection between the cable head and the high-current conductor.
  • the sheath of the high-current cable can be made of any material.
  • the sheathing is designed in such a way that no liquid can escape.
  • the casing can thus be formed in one layer from, for example, a plastic or rubber material.
  • the sheathing can also consist of a multi-layer composite, at least one layer being liquid-tight and at least one further layer having other functional properties, such as, for example, a reinforcement for protection against external influences.
  • the sheathing is through a flexible hose educated.
  • the flexible design of the hose improves the mobility of the high-current cable. There is also an increase in the pressure and fatigue strength of the hose.
  • such hoses do not have to be specially manufactured, but can be inexpensively selected from the wide range of hoses available on the market in accordance with their profile of requirements with regard to cross section, pressure resistance and material.
  • the flexible hose simply has to be pulled coaxially over the high-current conductor and then connected to the hose ends with the latter, if necessary, in a liquid-tight and pressure-tight manner.
  • the connection between the hose and the high-current conductor can be made as desired. So the hose can be cohesive, e.g. B. by gluing, and / or non-positively, for. B. be connected to the high-current conductor by means of a hose clamp.
  • the hose is preferably pressed at at least one end together with the high-current conductor and / or the cable head.
  • the electrode arm is also made of aluminum or an aluminum alloy.
  • the weight and not least the material costs for the entire feed device are significantly reduced.
  • the susceptibility to contact corrosion on the feed device and in particular on the electrical contact points between the high-current conductor and cable head on the one hand and the cable head and electrode arm on the other hand is significantly reduced.
  • Fig. 1 a perspective view of a first embodiment of a high-current cable for electrically conductive contacting an electrode support arm of an arc furnace.
  • the illustrated embodiment of 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 shown here by way of example.
  • the individual conductors 5 are coaxially surrounded by insulation 6.
  • the illustrated embodiment is a liquid-cooled high-current cable 1.
  • the individual conductors 5, which have insulation 6, are arranged spaced apart from one another within a sheath 3 filled with a cooling liquid 7 or through which cooling liquid 7 flows.
  • the casing 3 is provided with connections 8 for supplying and discharging the cooling liquid 7, wherein in Fig. 1 due to the perspective view, only one connection 8 is visible.
  • the high-current cable 1 in the illustrated embodiment has 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)
  • Electrolytic Production Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Conductive Materials (AREA)

Claims (10)

  1. Câble de courant haute intensité (1) pour la mise en contact électriquement conductrice d'un bras de support d'électrodes d'un four électrique destiné à un procédé de refusion sous laitier électro-conducteur et de fours de réduction, comprenant
    - un conducteur haute intensité (2),
    - une gaine isolante (3) entourant le conducteur haute intensité, et
    - une tête de câble (4) reliée au conducteur haute intensité par au moins une extrémité de câble,
    caractérisé en ce que
    - le conducteur haute intensité (2) et la tête de câble (4) sont constitués d'aluminium ou d'un alliage d'aluminium.
  2. Câble de courant haute intensité (1) selon la revendication 1, caractérisé en ce que le conducteur haute intensité (2) présente au moins deux conducteurs individuels (5).
  3. Câble de courant haute intensité (1) selon la revendication 1 ou 2, caractérisé en ce que les conducteurs individuels (5) présentent une isolation (6) disposée de façon coaxiale.
  4. Câble de courant haute intensité (1) selon l'une des revendications précédentes, caractérisé en ce que le conducteur haute intensité (2) est refroidi par un liquide, en particulier dans un liquide de refroidissement (7) se trouvant dans la gaine (3).
  5. Câble de courant haute intensité (1) selon l'une des revendications précédentes, caractérisé en ce que la tête de câble (4) est reliée par liaison de force au conducteur haute intensité (2), en particulier par compression.
  6. Câble de courant haute intensité (1) selon l'une des revendications précédentes, caractérisé en ce que la tête de câble (4) présente des saillies s'étendant vers le conducteur haute intensité (2).
  7. Câble de courant haute intensité (1) selon la revendication 6, caractérisé en ce que les saillies sont formées par des épines et/ou des anneaux.
  8. Câble de courant haute intensité (1) selon l'une des revendications précédentes, caractérisé en ce que la gaine (3) est formée par un tuyau souple.
  9. Câble de courant haute intensité (1) selon l'une des revendications précédentes, caractérisé en ce que le conducteur haute intensité (2) présente au total une section transversale de 100 à 7500 mm2, de préférence de 1000 à 6000 m2 et/ou les conducteurs individuels (5) présentent une section transversale de 10 à 1000 mm2, de préférence de 100 à 600 mm2.
  10. Dispositif d'alimentation pour des fours électriques destinés à des procédés de refusion sous laitier électro-conducteur et des fours de réduction avec un bras de support d'électrodes, caractérisé en ce que le bras de support d'électrodes est constitué d'aluminium ou d'un alliage d'aluminium et relié à un câble de courant haute intensité (1) selon l'une ou plusieurs des revendications 1 à 9.
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 EP3102001A1 (fr) 2016-12-07
EP3102001B1 true 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)

Family Cites Families (8)

* 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
SE322850B (fr) * 1965-06-10 1970-04-20 Asea Ab
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
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
ES2392101T3 (es) * 2007-02-15 2012-12-04 Arndt Dung Ensamblaje del tubo flexible de un cable de alta corriente refrigerado con agua con la cabeza del cable compacta

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102015108815B3 (de) 2016-10-27
ES2819523T3 (es) 2021-04-16
PL3102001T3 (pl) 2020-12-28
EP3102001A1 (fr) 2016-12-07

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