EP0405700B1 - Lowering system for electrodes - Google Patents

Lowering system for electrodes Download PDF

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Publication number
EP0405700B1
EP0405700B1 EP90250149A EP90250149A EP0405700B1 EP 0405700 B1 EP0405700 B1 EP 0405700B1 EP 90250149 A EP90250149 A EP 90250149A EP 90250149 A EP90250149 A EP 90250149A EP 0405700 B1 EP0405700 B1 EP 0405700B1
Authority
EP
European Patent Office
Prior art keywords
electrode
tube
slipping device
elements
frame
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
EP90250149A
Other languages
German (de)
French (fr)
Other versions
EP0405700A2 (en
EP0405700A3 (en
Inventor
Luciano Ambrosi
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT90250149T priority Critical patent/ATE98083T1/en
Publication of EP0405700A2 publication Critical patent/EP0405700A2/en
Publication of EP0405700A3 publication Critical patent/EP0405700A3/en
Application granted granted Critical
Publication of EP0405700B1 publication Critical patent/EP0405700B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B7/109—Feeding arrangements

Definitions

  • the invention relates to a repositioning device for electrodes with a pressing device consisting of a one-piece, ring-shaped hose filled with a pressure medium, which is arranged between clamping elements, which are arranged radially around the electrode, and a framework.
  • a repositioning device in which clamping elements are pressed onto the outer electrode sleeve with the aid of a pressure medium drive.
  • the heart of the pressure medium drive is a one-piece, annular hose that can be filled with pressure medium.
  • the increase in volume of the tube caused by pressure increase leads to the required contact pressure, which fixes the electrode vertically and horizontally.
  • the electrodes often have a weight of up to 50 t in practice, high forces arise which have to be compensated for by the contact material.
  • the weight of the electrode creates strong tensions.
  • the hose is subjected to severe material stresses, caused by strong tensile stresses. On top of that, the hose material can be further stressed by deformations and edge crushing.
  • the object of the invention is to provide a repositioning device which, with simple design means, ensures that the electrodes are held securely and increases the service life of the pressure hose material.
  • clamping elements have holding and guide brackets which are horizontally slidably mounted on the scaffolding, and in that supporting elements are provided on the clamping elements which partially rest on the hose filled with pressure medium.
  • the vertical weight forces and the horizontal contact forces are considered separately.
  • the proportion of the stresses that arise from the vertical weight forces is transferred directly to the scaffolding via the holding bracket.
  • the hose material is only loaded by the horizontal contact forces. Due to the length ratio of the hose edges from 5: 1 to 10: 1, the hose is adapted to this ratio of forces. This leads to a strong relief of the pressure hose material.
  • a second task of the holding bracket is to prevent the clamping elements from sliding off in an uncontrolled manner when the pressure in the hose is reduced.
  • the guide console which does not have to transmit any forces, serves to protect the pressing device and ensures even pressure conditions.
  • the pressure hose is enclosed by the frame with its rounded lugs and the support elements. They only allow a hose expansion in the direction of the electrode. Because the support elements are slidably supported on the lugs and overlap with these, the shape of the hose is retained even under pressure when the clamping elements are displaced. This prevents uncontrolled kinking of the hose.
  • the edge-free, rounded shapes of the support elements prevent the pressure hose from touching sharp component edges.
  • the radius of the support elements and lugs is adapted to the thickness of the hose. All of these measures can protect the hose material from fatigue and also from cracks.
  • FIG. 1 shows a repositioning device for electrodes 10.
  • a pressing device 30 is mounted between the clamping elements 20 and the frame 40.
  • the pressure device 30, consisting of a pressure hose 31, is provided with pressure medium by a pressure generating station 33 via a feed line 32.
  • the frame 40 has lugs 41 which point inwards, are rounded on the hose side and bear against the pressure hose 31.
  • the clamping elements 20 are mounted radially around the electrode 10 and are divided into segments 21 and closing parts 25.
  • the segments 21 have holding brackets 22 and guide brackets 23.
  • a holding bracket 22 and a guide bracket 23 are each connected to a segment 21.
  • the surfaces of the brackets 22 rest on the lugs 41 of the frame 40 and are horizontally slidably mounted.
  • support elements 24 are attached to segment 21.
  • the support elements 24 consist of rounded bleaches which abut the pressure hose 31. They are slidably supported on the lugs 41 and overlap with these.
  • the support element 24 is fastened to the segment 21 by a welded connection.
  • the wear parts 25 are located between the electrode 10 and the segments 21. They are positively attached to the segments 21 by the ends of the wear parts 25 being bent over the segment edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Clamps And Clips (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Ceramic Capacitors (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Hybrid Cells (AREA)
  • Led Devices (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

An adjusting device for an electrode in a metal smelter. The device has a pressure mechanism comprising a, preferably, one-piece, ring-shaped flexible tube filled with a pressure medium. The pressure mechanism is positioned between clamp elements and radially positioned around the electrode and a frame. To ensure the secure retention of the electrode and increase the service life of the material of the pressurization tube, through a simple structural means, the present invention provides that the clamp elements have retaining brackets and guide brackets that are positioned to slide horizontally on the frame and support elements that are partially in contact with the tube that is filled with the pressure medium. The support elements are provided on the clamp elements.

Description

Die Erfindung betrifft eine Nachsetzvorrichtung für Elektroden mit einer aus einem einteiligen, ringförmig ausgebildeten, mit einem Druckmittel gefüllten Schlauchen bestehenden Anpreßvorrichtung, die zwischen Klemmelementen, welche radial um die Elektrode angeordnet sind, und einem Gerüst angeordnet ist.The invention relates to a repositioning device for electrodes with a pressing device consisting of a one-piece, ring-shaped hose filled with a pressure medium, which is arranged between clamping elements, which are arranged radially around the electrode, and a framework.

Nach DE-PS 11 65 783 ist eine Nachsetzvorrichtung bekannt, bei der mit Hilfe eines Druckmittelantriebes Klemmelemente an die äußere Elektrodenhülle gepreßt werden. Kernstück des Druckmittelantriebes ist ein einteiliger, ringförmiger Schlauch, der mit Druckmittel gefüllt werden kann. Die durch Druckerhöhung hervorgerufene Volumenvergrößerung des Schlauches führt zu der benötigen Anpreßkraft, welche die Elektrode vertikal und horizontal fixiert.According to DE-PS 11 65 783 a repositioning device is known in which clamping elements are pressed onto the outer electrode sleeve with the aid of a pressure medium drive. The heart of the pressure medium drive is a one-piece, annular hose that can be filled with pressure medium. The increase in volume of the tube caused by pressure increase leads to the required contact pressure, which fixes the electrode vertically and horizontally.

Da die Elektroden in der Praxis nicht selten eine Gewicht bis zu 50 t aufbringen, entstehen hohe Kräfte, die vom Anpreßmaterial kompensiert werden müssen. Die Gewichtskraft der Elektrode erzeugt starke Spannungen. An Punkten, an denen der Druckschlauch nicht mehr durch die radialen Anpreßkräfte an die Elektrode gepreßt wird, kommt es zu starken Materialbeanspruchungen im Schlauch, hervorgerufen durch starke Zugspannungen. Obendrein kann das Schlauchmaterial durch Verformungen und Kantenquetschungen noch weiter belastet werden.Since the electrodes often have a weight of up to 50 t in practice, high forces arise which have to be compensated for by the contact material. The weight of the electrode creates strong tensions. At points where the pressure hose is no longer pressed against the electrode by the radial contact forces, the hose is subjected to severe material stresses, caused by strong tensile stresses. On top of that, the hose material can be further stressed by deformations and edge crushing.

Aufgabe der Erfindung ist es, eine Nachsetzvorrichtung zu schaffen, die mit einfachen konstruktiven Mitteln ein sicheres Halten der Elektroden gewährleistet und die Lebensdauer des Druckschlauchmaterials erhöht.The object of the invention is to provide a repositioning device which, with simple design means, ensures that the electrodes are held securely and increases the service life of the pressure hose material.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß die Klemmelemente Halte- und Führungskonsolen aufweisen, die am Gerüst horizontal gleitend gelagert sind, und daß an den Klemmelementen Stützelement vorgesehen sind, die am mit Druckmittel gefüllten Schlauch teilweise anliegen.This object is achieved according to the invention in that the clamping elements have holding and guide brackets which are horizontally slidably mounted on the scaffolding, and in that supporting elements are provided on the clamping elements which partially rest on the hose filled with pressure medium.

Bei der erfindungsgemäßen Ausführung werden die vertikalen Gewichtskräfte und die horizontalen Anpreßkräfte getrennt betrachtet. Der Anteil der Spannungen, die durch die vertikalen Gewichtskräfte entstehen, wird über die Haltekonsole direkt auf das Gerüst übertragen. Das Schlauchmaterial wird nur noch durch die horizontalen Anpreßkräfte belastet. Durch das Längenverhältnis der Schlauchkanten von 5 : 1 bis 10 : 1 ist der Schlauch diesem Kräfteverhältnis angepaßt. Dies führt zu einer starken Entlastung des Druckschlauchmaterials.In the embodiment according to the invention, the vertical weight forces and the horizontal contact forces are considered separately. The proportion of the stresses that arise from the vertical weight forces is transferred directly to the scaffolding via the holding bracket. The hose material is only loaded by the horizontal contact forces. Due to the length ratio of the hose edges from 5: 1 to 10: 1, the hose is adapted to this ratio of forces. This leads to a strong relief of the pressure hose material.

Eine zweite Aufgabe der Haltekonsole besteht darin, ein unkontrolliertes Abgleiten der Klemmelemente bei Druckverminderung im Schlauch zu verhindern.A second task of the holding bracket is to prevent the clamping elements from sliding off in an uncontrolled manner when the pressure in the hose is reduced.

Die Führungskonsole, die keine Kräfte übertragen muß, dient als Schutz der Anpreßvorrichtung und sorgt für gleichmäßige Andruckbedingungen.The guide console, which does not have to transmit any forces, serves to protect the pressing device and ensures even pressure conditions.

Durch das Gerüst mit seinen abgerundeten Nasen und die Stützelemente wird der Druckschlauch eingefaßt. Sie lassen eine Schlauchausdehnung nur noch in Richtung der Elektrode zu. Indem die Stützelemente gleitend an den Nasen gelagert sind und sich mit diesen Überlappen, bleibt die Form des Schlauches auch unter Druck bei Verschiebung der Klemmelemente erhalten. Unkontrolliertes Knicken des Schlauches wird verhindert. Die kantenfreien, abgerundeten Formen der Stützelemente verhindern die Berührung des Druckschlauches mit scharfen Bauteilkanten. Der Radius der Stützelemente und Nasen ist der Dicke des Schlauches angepaßt. Durch all diese Maßnahmen kann das Schlauchmaterial vor Ermüdung und auch vor Rissen geschützt werden.The pressure hose is enclosed by the frame with its rounded lugs and the support elements. They only allow a hose expansion in the direction of the electrode. Because the support elements are slidably supported on the lugs and overlap with these, the shape of the hose is retained even under pressure when the clamping elements are displaced. This prevents uncontrolled kinking of the hose. The edge-free, rounded shapes of the support elements prevent the pressure hose from touching sharp component edges. The radius of the support elements and lugs is adapted to the thickness of the hose. All of these measures can protect the hose material from fatigue and also from cracks.

Der Vorteil bei der Benutzung von Verschleißteilen, die zwischen den Klemmsegmenten und der Elektrode angebracht sind, ist darin zu sehen, daß die direkt mit der Elektrode in Verbindung stehenden Flächen schnell und problemlos ausgewechselt werden können. Ihre einfache Form trägt zur Kostensenkung bei der Herstellung bei. Obendrein muß bei Verschleiß nicht das komplette Klemmelement ersetzt werden. Die Benutzung von Werkstoffen mit geringer Wärmeleitfähigkeit führt zu einer Wärmedämmung zwischen Elektrode und Schlauch und vermindert dadurch die Erwärmung des Schlauchmaterials.The advantage of using wear parts that are attached between the clamping segments and the electrode is that the surfaces directly connected to the electrode can be replaced quickly and easily. Their simple shape helps to reduce manufacturing costs. On top of that, the complete clamping element does not have to be replaced when worn. The use of materials with low thermal conductivity leads to thermal insulation between the electrode and the hose, thereby reducing the heating of the hose material.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigt:

Fig. 1
Klemmelement und Anpreßvorrichtung einer Nachsetzvorrichtung im Schnitt,
In the drawing, an embodiment of the invention is shown. It shows:
Fig. 1
Clamping element and pressing device of a repositioning device in section,

Figur 1 zeigt eine Nachsetzvorrichtung für Elektroden 10. Zwischen den Klemmelementen 20 und dem Gerüst 40 ist eine Anpreßvorrichtung 30 gelagert. Die Anpreßvorrichtung 30, bestehend aus einem Druckschlauch 31, wird von einer Druckerzeugungsstation 33 über eine Zuleitung 32 mit Druckmittel vorsorgt. Das Gerüst 40 weist Nasen 41 auf, die nach innen weisen, schlauchseitig abgerundet sind und am Druckschlauch 31 anliegen. Die Klemmelemente 20 sind radial um die Elektrode 10 gelagert und teilen sich auf in Segmente 21 und Verschließteile 25. Die Segmente 21 weisen Haltekonsolen 22 und Führungskonsolen 23 auf. Jeweils eine Haltekonsole 22 und eine Führungskonsole 23 ist mit einem Segment 21 verbunden. Die Flächen der Konsolen 22 liegen auf den Nasen 41 des Gerüstes 40 auf und sind horizontal gleitend gelagert. Weiterhin sind am Segment 21 Stützelemente 24 angebracht. Die Stützelemente 24 bestehen aus abgerundeten Bleichen, die am Druckschlauch 31 anliegen. Sie sind gleitend an den Nasen 41 gelagert und überlappen sich mit diesen. Durch eine Schweißverbindung sind die Stützelement 24 am Segment 21 befestigt. Zwischen Elektrode 10 und den Segmenten 21 befinden sich die Verschleißteile 25. Sie sind formschlüssig an den Segmenten 21 angebracht, indem die Enden der Verschleißteile 25 über die Segmentkanten gebogen sind.Figure 1 shows a repositioning device for electrodes 10. A pressing device 30 is mounted between the clamping elements 20 and the frame 40. The pressure device 30, consisting of a pressure hose 31, is provided with pressure medium by a pressure generating station 33 via a feed line 32. The frame 40 has lugs 41 which point inwards, are rounded on the hose side and bear against the pressure hose 31. The clamping elements 20 are mounted radially around the electrode 10 and are divided into segments 21 and closing parts 25. The segments 21 have holding brackets 22 and guide brackets 23. A holding bracket 22 and a guide bracket 23 are each connected to a segment 21. The surfaces of the brackets 22 rest on the lugs 41 of the frame 40 and are horizontally slidably mounted. Furthermore, support elements 24 are attached to segment 21. The support elements 24 consist of rounded bleaches which abut the pressure hose 31. They are slidably supported on the lugs 41 and overlap with these. The support element 24 is fastened to the segment 21 by a welded connection. The wear parts 25 are located between the electrode 10 and the segments 21. They are positively attached to the segments 21 by the ends of the wear parts 25 being bent over the segment edges.

Claims (8)

  1. A slipping device for electrodes (10), comprising a pressing means (30) consisting of a one-piece, annular tube (31) which is filled with a pressure medium, which means is located between clamping elements (20) which are arranged radially around the electrode (10) and a frame (40),
    characterised in that the clamping elements (20) have holding brackets (22) and guide brackets (23) which are mounted to slide horizontally on the frame (40), and that supporting elements (24) are provided on the clamping elements (20), which supporting elements partly lie against the tube (31) filled with pressure medium.
  2. A slipping device according to Claim 1,
    characterised in that the frame (40) in the region of the holding bracket (22) and the guide bracket (23) has inward-pointing noses (41) which have a rounded-off form on the tube side.
  3. A slipping device according to Claim 1,
    characterised in that the supporting elements (24) are rounded-off metal plates.
  4. A slipping device according to Claim 3,
    characterised in that the radius of the plates (24) corresponds to at least 5 times the wall thickness of the tube (31).
  5. A slipping device according to Claims 2 and 3,
    characterised in that the supporting elements (24) are mounted to slide on the noses (41) and overlap the latter.
  6. A slipping device according to Claim 1,
    characterised in that wearing parts (25) are provided between the clamping elements (20) and the electrode (10).
  7. A slipping device according to Claim 6,
    characterised in that the material of the wearing parts (25) has low thermal conductivity, e.g. is ceramic.
  8. A slipping device according to Claim 1,
    characterised in that the tube (31) on its side parallel to the electrode (10) has a length which is in a ratio of 5 : 1 to 10 : 1 with the length of the tube side lying perpendicular to the electrode (10).
EP90250149A 1989-06-26 1990-06-08 Lowering system for electrodes Expired - Lifetime EP0405700B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90250149T ATE98083T1 (en) 1989-06-26 1990-06-08 ADJUSTMENT DEVICE FOR ELECTRODES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921238A DE3921238A1 (en) 1989-06-26 1989-06-26 ADJUSTMENT DEVICE FOR ELECTRODES
DE3921238 1989-06-26

Publications (3)

Publication Number Publication Date
EP0405700A2 EP0405700A2 (en) 1991-01-02
EP0405700A3 EP0405700A3 (en) 1992-04-15
EP0405700B1 true EP0405700B1 (en) 1993-12-01

Family

ID=6383813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250149A Expired - Lifetime EP0405700B1 (en) 1989-06-26 1990-06-08 Lowering system for electrodes

Country Status (8)

Country Link
US (1) US5056104A (en)
EP (1) EP0405700B1 (en)
AT (1) ATE98083T1 (en)
BR (1) BR9002998A (en)
CA (1) CA2019747A1 (en)
DE (2) DE3921238A1 (en)
ES (1) ES2046683T3 (en)
ZA (1) ZA903962B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3150856B2 (en) * 1994-10-12 2001-03-26 株式会社リコー Image processing method
US5774802A (en) 1996-04-10 1998-06-30 Motorola Inc. Apparatus and method for billing in a wireless communication system
US6377605B1 (en) * 2001-03-02 2002-04-23 Hatch Associates Ltd. Electrode seal for arc furnace
FI20195097A1 (en) 2013-12-20 2019-02-11 9282 3087 Quebec Dba Tmc Canada Metallurgical furnace

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051625A (en) * 1951-02-15 1954-01-18 Elektrokemisk As Electrode holder
DE1165783B (en) * 1954-01-11 1964-03-19 Demag Elektrometallurgie Gmbh Electrode holder
US2778865A (en) * 1956-01-09 1957-01-22 Elektrokemisk As Suspension mechanism for continuous type electrodes and method of operation
US2921108A (en) * 1957-05-11 1960-01-12 Demag Elektrometallurgie Gmbh Furnace electrode holding means
US2884475A (en) * 1957-07-12 1959-04-28 Elektrokemisk As Clamp members for supporting electrodes
FR2136965A1 (en) * 1971-05-10 1972-12-29 Zinkovsky Viktor Electrode holder - that can vertically adjust industrial furnace electrodes without damage to them by friction
US3950601A (en) * 1973-04-02 1976-04-13 Alexandr Nikolaevich Popov Electric furnace
US3898364A (en) * 1974-09-05 1975-08-05 Stanford A Hardin Combined suspension device for holding, contacting, slipping and torquing electric furnace electrodes
FR2363958A1 (en) * 1976-09-07 1978-03-31 Bozel Electrometallurgie High power furnace contact plate - forms piston biased into contact with electrodes by hydraulic pressure of coolant
US4154974A (en) * 1977-09-16 1979-05-15 Lectromelt Corporation Clamp for arc furnace electrode
NO141232C (en) * 1977-12-05 1985-06-03 Elkem As DEVICE FOR GASSTEET TRANSMISSION OF ELECTRODES IN CLOSED ELECTRICAL Melting Ovens
FR2466168A1 (en) * 1979-09-24 1981-03-27 Roche Maurice Electric current connector - esp. for supplying current via contact segments to electrode in metallurgical furnace
GB2087699B (en) * 1980-11-17 1984-07-18 Leybold Heraeus Gmbh & Co Kg Graphite electrode for use in an electric furnace
DE3265147D1 (en) * 1981-03-24 1985-09-12 Krupp Gmbh High-current conductor system for electric furnaces
AT388444B (en) * 1984-09-18 1989-06-26 Voest Alpine Ag ELECTRIC OVEN

Also Published As

Publication number Publication date
DE3921238C2 (en) 1991-11-07
BR9002998A (en) 1991-08-20
CA2019747A1 (en) 1990-12-26
EP0405700A2 (en) 1991-01-02
DE3921238A1 (en) 1991-01-10
ATE98083T1 (en) 1993-12-15
ZA903962B (en) 1991-03-27
DE59003660D1 (en) 1994-01-13
EP0405700A3 (en) 1992-04-15
US5056104A (en) 1991-10-08
ES2046683T3 (en) 1994-02-01

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