EP1527657A2 - Dispositif de refroidissement d'electrode - Google Patents

Dispositif de refroidissement d'electrode

Info

Publication number
EP1527657A2
EP1527657A2 EP03790888A EP03790888A EP1527657A2 EP 1527657 A2 EP1527657 A2 EP 1527657A2 EP 03790888 A EP03790888 A EP 03790888A EP 03790888 A EP03790888 A EP 03790888A EP 1527657 A2 EP1527657 A2 EP 1527657A2
Authority
EP
European Patent Office
Prior art keywords
electrode
electrode holder
cooling device
holder according
nozzles
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.)
Withdrawn
Application number
EP03790888A
Other languages
German (de)
English (en)
Inventor
Uwe Kark
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.)
Kark AG
Original Assignee
Kark 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 Kark AG filed Critical Kark AG
Publication of EP1527657A2 publication Critical patent/EP1527657A2/fr
Withdrawn legal-status Critical Current

Links

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
    • H05B7/12—Arrangements for cooling, sealing or protecting electrodes

Definitions

  • a spray ring is arranged below the electrode holder attached to the electrode support arm, which is formed by a tube loaded with cooling water and turns the nozzle surface towards spray nozzles.
  • the cooling reduces the electrode consumption and the clamping devices for the electrode are also protected against excessive heat.
  • the known arrangement has the disadvantage that electrical flashovers can occur which can damage both the cooling device and the electrode holder. This applies particularly to electrode breakage; there is then a risk that the electrode holder will touch the stump of the electrode connected to the bath. The same can happen if there is scrap scrap on the stove.
  • the electrode cooling device is electrically insulated from the electrode holder. This not only protects the cooling device, but also the electrode holder.
  • This protection of the electrode holder can be improved over the conventional arrangement of the cooling device in that the electrode cooling device essentially covers the electrode holder on the underside. It is formed over a large area and has an outer contour that is similar to that of the electrode holder (seen from below) or like. It can be attached to fixed parts of the electrode holder. Under the movable parts of the electrode holder it can cantilever or - more appropriately - be supported on it in such a way that the clamping movements of these parts do not impair the support.
  • Detachable fastening devices must be provided for connecting or supporting the electrode cooling device on the electrode holder. So that they do not become unusable due to the effect of the furnace, they should be arranged above cooled parts of the electrode cooling device. They are expediently accessible from the side.
  • the invention further aims to improve the cooling effect of the spray nozzles.
  • a spray nozzle for this purpose, a
  • Compressed air supply is provided, which ensures a better distribution and possibly also alignment of the cooling water to the parts to be cooled.
  • the cooling is thereby more effective and the cooling medium consumption is reduced. Adequate cooling can also be maintained thanks to the better distribution even if one or the other spray nozzle should fail. This feature deserves protection regardless of the claims referred to.
  • nozzles due to splashes can be prevented according to the invention in that a screen covering the direct spray direction from the bath or arc to the nozzles is provided below the nozzles.
  • Figure 1 is a side view of an electrode holder with cooling device.
  • FIG. 3 shows a partial section along section line AA of FIG. 1 4 shows the detail W X "indicated in FIG. 1; and FIG. 5 shows the detail W Y" indicated in FIG. 4.
  • the electrode holder 3 is fastened by means of flanges 2, which consists of a rear, shaft-like part 4, associated fixed jaws 5 and a movable jaw 6.
  • This arrangement is of a conventional type and is provided with suitable drive and coolant feeds.
  • the cooling device 10 designed according to the invention which has the external shape of a horizontal plate, the outline of which, as shown in particular in FIG. 2, essentially corresponds to that of the electrode holder 3. In its front area, it forms a ring part 11 which surrounds the electrode 12.
  • the cooling device is a flat, hollow box, which is formed by a bottom wall 14, a top wall 15 and a circumferential outer wall 16.
  • An inner wall 17 is added in the area of the ring part 11.
  • the box is also closed by a suitable wall and connected to a cooling water source via a line 19.
  • the cooling device 10 is connected to the fixed part 4 of the electrode holder by four fastening devices, which are generally indicated in FIG. 2 by the reference number 20. Corresponding fastening devices can also be provided for the fixed jaws 5. Their structure is shown in more detail in Fig. 3. Pins 22 are attached to the lower plate 21 of the electrode holder, each of which engages with its portion 23 in a recess 24 of the cooling device 10 and is secured there by means of a bolt 25 to be mounted from the side. The head of the bolt 25 is seated in a recess which is protected by a plate 26 which is suitably detachably fastened.
  • the pin 22 is electrically insulating. For example, in its entirety it can consist of electrically insulating material.
  • the cooling device 10 is electrically separated from the electrode holder. It is understood that the cooling water supply line 19 is also insulated accordingly.
  • the ring part 11 of the cooling device can protrude freely from the rear part of the cooling device held by means of the fastening devices just explained. It is better if it is additionally supported on the movable frame parts 6.
  • a device 35 is provided, which is shown in more detail in FIG. 4.
  • a support 36 projects downward from the clamping jaw 6 and ends in an insulating plate 37.
  • a sliding plate 38 is attached, which abuts the insulating plate 37.
  • the electrode clamp 6 can move freely within the predetermined range via this support device without losing the support effect.
  • the cooling device acts as a heat protection plate for the electrode holder and can thereby significantly increase its service life. It can easily be retrofitted to existing sockets. Since the mounting screws 25 are protected and this ensures that they remain ready for operation, quick and quick assembly or disassembly can be expected. In order, if desired, to enable the cooling device when the electrode is installed, it can be provided that the ring part 11 of the cooling device is designed to be divided.
  • the ring part 11 of the cooling device is as hollow as its rear part.
  • the wall 17 there are nozzle bores 40 through which the cooling water, which is under pressure and located in the interior 41 of the cooling device, is sprayed out against the surface of the electrode 12.
  • a bore 42 which starts from a compressed air line 43, opens diagonally into the bore 40 is welded to the inner circumference of the wall 17 next to the row of spray bores 40. It is connected in a manner not shown to a compressed air supply line 44 (FIG. 1), which is connected to the cooling device 10 in an electrically insulating manner.
  • the compressed air supply to the spray nozzles 40 promotes the cooling water distribution and the formation of the spray jet.
  • the electrode surface is wetted better and the cooling effect is increased accordingly.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Resistance Welding (AREA)

Abstract

L'invention concerne un support d'électrode pourvu, sur sa face inférieure, d'un dispositif de refroidissement. Le dispositif de refroidissement d'électrode est électriquement isolé du support pour éviter tout endommagement par décharge disruptive. Pour mieux protéger le support d'électrode, le dispositif de refroidissement recouvre sensiblement la face inférieure de ce support. Pour améliorer le refroidissement par pulvérisation, les buses sont équipées d'une alimentation en air comprimé.
EP03790888A 2002-08-08 2003-08-08 Dispositif de refroidissement d'electrode Withdrawn EP1527657A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10236442 2002-08-08
DE10236442A DE10236442A1 (de) 2002-08-08 2002-08-08 Elektrodenkühleinrichtung
PCT/EP2003/008823 WO2004021743A2 (fr) 2002-08-08 2003-08-08 Dispositif de refroidissement d'electrode

Publications (1)

Publication Number Publication Date
EP1527657A2 true EP1527657A2 (fr) 2005-05-04

Family

ID=30469606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03790888A Withdrawn EP1527657A2 (fr) 2002-08-08 2003-08-08 Dispositif de refroidissement d'electrode

Country Status (6)

Country Link
US (1) US20060034342A1 (fr)
EP (1) EP1527657A2 (fr)
AU (1) AU2003263203A1 (fr)
DE (1) DE10236442A1 (fr)
RU (1) RU2293450C2 (fr)
WO (1) WO2004021743A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2020013795A (es) 2018-10-15 2021-03-02 Chemtreat Inc Metodos de proteccion de los electrodos de un horno con liquido refrigerante que contiene un aditivo.
ES2981237T3 (es) 2018-10-15 2024-10-07 Chemtreat Inc Electrodos de horno para enfriamiento por aspersión con líquido enfriador que contiene tensioactivos

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0795474B2 (ja) * 1987-03-17 1995-10-11 日本カ−ボン株式会社 電気ア−ク製鋼等金属の溶解および精錬法ならびにそれに供する電極冷却装置
DE8805807U1 (de) * 1988-05-02 1989-08-31 Badische Stahl-Engineering GmbH, 7640 Kehl Tragarm für eine Elektrode eines Lichtbogenofens
US4852120A (en) * 1988-11-08 1989-07-25 Nikko Industry Co., Ltd. Cooling apparatus for electric arc furnace electrodes
JPH05114479A (ja) * 1991-10-23 1993-05-07 Aichi Steel Works Ltd 製鋼用電気炉の電極冷却水噴出用リング
RU2230440C2 (ru) * 2001-02-01 2004-06-10 Хлопонин Виктор Николаевич Способ охлаждения электрода в процессе работы электропечи и электрод для его осуществления

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004021743A2 *

Also Published As

Publication number Publication date
AU2003263203A1 (en) 2004-03-19
RU2293450C2 (ru) 2007-02-10
WO2004021743A3 (fr) 2004-04-22
RU2005106283A (ru) 2006-01-20
US20060034342A1 (en) 2006-02-16
DE10236442A1 (de) 2004-02-19
WO2004021743A2 (fr) 2004-03-11
AU2003263203A8 (en) 2004-03-19

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