EP0363247B1 - Vorrichtung zum Anbringen und Entfernen eines Plasmabrenners in einen Apparat, der unter einem solchen Druck und einer solchen Temperatur arbeitet, dass direktes Arbeiten unmöglich ist - Google Patents

Vorrichtung zum Anbringen und Entfernen eines Plasmabrenners in einen Apparat, der unter einem solchen Druck und einer solchen Temperatur arbeitet, dass direktes Arbeiten unmöglich ist Download PDF

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Publication number
EP0363247B1
EP0363247B1 EP89402601A EP89402601A EP0363247B1 EP 0363247 B1 EP0363247 B1 EP 0363247B1 EP 89402601 A EP89402601 A EP 89402601A EP 89402601 A EP89402601 A EP 89402601A EP 0363247 B1 EP0363247 B1 EP 0363247B1
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EP
European Patent Office
Prior art keywords
torch
seal
arrangement according
tip
shutter
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
EP89402601A
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English (en)
French (fr)
Other versions
EP0363247A1 (de
Inventor
Jean Feuillerat
Jean Jouanno
Yves Hervé Guillaume Valy
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.)
Airbus Group SAS
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Airbus Group SAS
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Filing date
Publication date
Application filed by Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0363247A1 publication Critical patent/EP0363247A1/de
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Publication of EP0363247B1 publication Critical patent/EP0363247B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/002—Heated electrically (plasma)

Definitions

  • the present invention relates generally to the use of plasma torches on installations, or apparatus operating under conditions of high temperature and pressure prohibiting any direct intervention for the setting or removal of the torch, and it relates more particularly to a device for handling a plasma torch with an arc not transferred to such an apparatus.
  • a method is known, described in French patent application FR-A-2,637,443 relating to a method and device for the placing and removing of a plasma torch on an apparatus operating under pressure and pressure conditions. temperature prohibiting direct intervention.
  • a tight volume capable of varying is produced upstream of a valve closing a connection sleeve for the torch, and the pressure prevailing in this volume is balanced with that prevailing downstream of the valve, before opening this to post the nose of the torch.
  • Document GB-A-2,167,843 also discloses a device of the type defined in the preamble to the main claim in which a circular seal is inserted between the internal wall of the cuff and the nose of the torch which it surrounds , the nose of the torch being downstream of the valve and the fixed seal remaining in the upstream position in the active position of the torch.
  • the object of the present invention is to provide an embodiment of a device of the type described in this document for implementing the method described and represented in document FR-A-2,637,443 and which in particular makes it possible to produce a tight volume in the cuff without the torch nose stumbling on the closed valve.
  • a device for the stationing in the active position of a plasma torch with arc not transferred to a cuff comprising a shut-off valve and connected to a device operating under high pressure and temperature conditions , without modification of these conditions, as well as its withdrawal, and of the type comprising at least one circular seal inserted between the internal wall of the cuff and the nose of the torch and surrounding the latter, characterized in that it comprises in combination means for balancing the pressures on either side of the valve and means for cooling the seal and characterized in that the dimensions of the device are such that the total length L1 of the cuff is equal to the length of the nose, L1 is greater than twice the distance L2 between the nose of the torch in the active position and the upstream plane of the valve and the distance L3 between the upstream plane of the seal and the nose of the tor che is less than L1 - L2.
  • the means for balancing the pressures on either side of the valve comprise a setting pipe communication bypassing the valve, and a tap interposed on this pipe.
  • said seal is mounted on the nose of the torch, in a peripheral groove.
  • said seal is mounted in a peripheral groove of a circular cradle fitted around the nose of the torch.
  • said cradle is formed of two parts joined axially and together delimiting said groove.
  • said cradle is fitted into a groove formed in the external surface of the nose of the torch.
  • said seal is arranged in a groove formed in the internal surface of the cuff.
  • said joint is a metal joint of C-shaped section or a self-elastic joint of U-shaped section.
  • the means for cooling the joint comprise a circuit for circulating a cooling fluid.
  • said circuit is that which cools the nose of the torch.
  • said circuit consists of a jacket surrounding the cuff at least at the joint.
  • Figures 1, 2 and 3 are schematic sectional views showing the phases of the establishment of a plasma torch with non-transferred arc, in a first embodiment of the device according to the invention.
  • FIGS. 4 to 7 are partial sectional views of mounting variants of a joint according to the embodiment of FIGS. 1 to 3.
  • Figure 8 is a sectional view of another embodiment of the invention.
  • the reference 1 designates a nozzle of an apparatus, for example a blast furnace, on which a plasma torch 4 of the non-transferred arc type is used, having a nose 12 engaged in one end a cuff 3 fixed by its end opposite to the nozzle 1, and closed by a valve 5.
  • the cuff 3 comprises a flange 7 having a chamfer 8 adapted to cooperate with a frustoconical surface 9 for centering provided around the nose 12 of the torch 4.
  • a guide rod 10 is fixed on the collar 7 of the cuff and extends through a hole provided in a flange 11 of the torch in order to guide the latter towards the cuff 3.
  • An O-ring 2 is mounted on the nose 12, which it surrounds, in a manner which will be described in more detail below.
  • a pipe 6 connects the upstream side of the valve 5 to its downstream side, the side for introducing the torch into the cuff being considered as the upstream side as opposed to the end of the cuff on the nozzle side where the conditions prevail high operating pressure and temperature.
  • a tap 13 is interposed in the pipe 6 to control the communication of the upstream and downstream sides of the valve.
  • the valve 13 is protected against overheating, for example by a coil 26 in which a coolant circulates.
  • FIG. 1 shows the torch 4 in position before it is set up and comes into action, the valve 5 being closed and subjected on its downstream face to the pressure of the device, the tap 13 being closed.
  • Figure 2 shows the nose 12 of the valve engaged in the cuff 3, the valve 13 and the valve 5 being always closed.
  • valve 13 is then opened in order to bring this volume upstream of the valve 5 to the same pressure as that prevailing downstream.
  • the reference 3 designates the wall of the cuff
  • the reference 12 designates the nose of the torch as a whole.
  • the nose 12 is formed in two parts 14, 15 upstream and downstream respectively adjusted together for example by means of threads 16 and which are shaped so as to form between them a peripheral groove 17 forming a housing for the seal 2.
  • the nose 12 internally comprises a cooling circuit in which a cooling fluid circulated designated by the reference 18 and the sealing of this circuit is ensured by a seal 19 between the parts 14 and 15.
  • the seal 2 is made of metal, of section in C. Thanks to this arrangement, the seal 2 is effectively cooled by the cooling circuit of the nose of the torch.
  • the arrangement is identical to that of FIG. 4, with the exception of the seal 20, which is of the so-called self-elastic type of U-section having a metal core and an elastomer coating and the wings of which are in contact with the parts between which it seals.
  • the seal 2 is disposed in a housing 17 delimited by two annular elements 24, 25 fixed around the nose 12 by any suitable means, thus leaving a gap between the nose of the torch and the cuff.
  • This arrangement also ensures good heat transfer between the nose and the seal, and therefore good cooling of the latter.
  • FIG. 7 The arrangement of FIG. 7 is similar to the previous one, but the elements 24, 25 supporting the seal 2 are mounted in a groove 27 delimited between the parts 14 and 15 of the nose 12.
  • This arrangement provides the elements 24 and 25 with a larger contact surface with the nose 12, further improving the heat transfer.
  • FIG. 8 shows a variant in which the seal 22 is mounted in a groove 21 formed in the internal surface of the cuff 33.
  • the seal 22 must be cooled through the cuff by means of a jacket 23 surrounding the latter and in which a cooling fluid is circulated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma Technology (AREA)
  • Arc Welding In General (AREA)
  • Manufacture Of Iron (AREA)

Claims (10)

  1. Vorrichtung für die Instellungbringung eines Plasmalichtbogenbrenners ohne Überschlag in aktive Position auf einem einen Sperrschieber enthaltenden und mit einer Anlage, die unter erhöhten Druck- und Temperaturbedingungen funktioniert, verbundenen Stutzen ohne Änderung dieser Bedingungen, sowie für dessen Rückzug, und des Typs, der mindestens eine zwischen Innenwand des Stutzens (3, 33) und Kopf (12) des Brenners (4) und den Kopf umgebende Runddichtung (2, 20, 22) enthält, dadurch gekennzeichnet, daß sie Einrichtungen (6, 13) für den Ausgleich der Drücke auf beiden Seiten des Schiebers (5), und Einrichtungen (18, 23) zur Kühlung der Dichtung enthält, und dadurch, daß die Maße der Vorrichtung derart sind, daß die Gesamtlänge L1 des Stutzens (13) der Länge des Kopfes (12) gleichkommt, L1 größer ist als der doppelte bestand L2 zwischen dem Kopf (12) des Brenners in aktiver Stellung und der Ebene vor dem Schieber (5), und der Abstand L3 zwischen der Ebene vor der Dichtung und dem Kopf (12) des Brenners geringer ist als L1 - L2.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtungen für den Ausgleich der Drücke auf beiden Seiten des Schiebers ein den Schieber (5) umführendes Verbindungsrohr (6), und einen in das Rohr geschalteten und die Seite vor dem Schieber (5) mit der Seite nach dem Schieber verbindenden Hahn (13) enthalten.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtung (2, 22) auf dem Kopf (12) des Brenners (4) in einer peripheren Vertiefung (17) montiert ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Dichtung (2) in einer peripheren Vertiefung (17) eines um den Kopf (12) des Brenners (4) angeordneten Rundsattels (24, 25) montiert ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Sattel aus zwei Teilen (24, 25) gebildet ist, die sich axial vereinigen und zusammen die Vertiefung 17 begrenzen.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Sattel (24, 25) in einer in die Außenfläche des Kopfes (12) des Brenners (4) eingearbeiteten Vertiefung (27) angeordnet ist.
  7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtung (22) in einer in die Innenfläche des Stutzens (3) eingearbeiteten Vertiefung (21) angeordnet ist.
  8. Vorrichtung nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Dichtung eine Metalldichtung (2) mit C-förmigem Querschnitt oder eine selbstelastische Dichtung (20) mit U-förmigem Querschnitt ist.
  9. Vorrichtung nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Kühleinrichtungen der Dichtung (2, 22) einen Kreis (18) für den Umlauf einer Kühlflüssigkeit enthalten, wobei dieser Kreis der Kreis ist, der die Kühlung des Brennerkopfes (12) sichert.
  10. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Kühleinrichtungen der Dichtung (22) einen den Stutzen (3) umhüllenden Mantel (23) enthalten, in dem eine Kühlflüssigkeit umläuft.
EP89402601A 1988-10-03 1989-09-22 Vorrichtung zum Anbringen und Entfernen eines Plasmabrenners in einen Apparat, der unter einem solchen Druck und einer solchen Temperatur arbeitet, dass direktes Arbeiten unmöglich ist Expired - Lifetime EP0363247B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812898A FR2637442B1 (fr) 1988-10-03 1988-10-03 Dispositif pour la mise a poste et le retrait d'une torche a plasma sur un appareil fonctionnant sous pression et temperature interdisant une intervention directe
FR8812898 1988-10-03

Publications (2)

Publication Number Publication Date
EP0363247A1 EP0363247A1 (de) 1990-04-11
EP0363247B1 true EP0363247B1 (de) 1993-06-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402601A Expired - Lifetime EP0363247B1 (de) 1988-10-03 1989-09-22 Vorrichtung zum Anbringen und Entfernen eines Plasmabrenners in einen Apparat, der unter einem solchen Druck und einer solchen Temperatur arbeitet, dass direktes Arbeiten unmöglich ist

Country Status (7)

Country Link
US (1) US4972063A (de)
EP (1) EP0363247B1 (de)
JP (1) JPH0665196B2 (de)
CA (1) CA1311532C (de)
DE (1) DE68907306T2 (de)
ES (1) ES2042035T3 (de)
FR (1) FR2637442B1 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924269A (en) * 1956-10-01 1960-02-09 United States Steel Corp Blast furnace stove gas-port and burner nozzle connection
US3749803A (en) * 1972-08-24 1973-07-31 Techn Applic Services Corp Trough hearth construction and method for plasma arc furnace
CA1173784A (en) * 1981-07-30 1984-09-04 William H. Gauvin Transferred-arc plasma reactor for chemical and metallurgical applications
US4477248A (en) * 1983-08-04 1984-10-16 Dulac Robert R Oil burner shutter
US4654504A (en) * 1983-11-30 1987-03-31 Hewlett-Packard Company Water-cooled gas discharge detector
SE451756B (sv) * 1984-10-19 1987-10-26 Skf Steel Eng Ab Plasmageneratorinstallation i schaktugn
US4659899A (en) * 1984-10-24 1987-04-21 The Perkin-Elmer Corporation Vacuum-compatible air-cooled plasma device
SE451882B (sv) * 1984-12-03 1987-11-02 Skf Steel Eng Ab Anordning for underlettande av anslutning av brennare, t ex plasmagenerator, till reaktorformor vid schaktugnar for metalloxidreduktion
US4761793A (en) * 1987-05-08 1988-08-02 Electric Power Research Institute Plasma fired feed nozzle

Also Published As

Publication number Publication date
FR2637442B1 (fr) 1990-11-02
DE68907306D1 (de) 1993-07-29
US4972063A (en) 1990-11-20
CA1311532C (fr) 1992-12-15
DE68907306T2 (de) 1993-09-30
EP0363247A1 (de) 1990-04-11
ES2042035T3 (es) 1993-12-01
JPH02168597A (ja) 1990-06-28
JPH0665196B2 (ja) 1994-08-22
FR2637442A1 (fr) 1990-04-06

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