EP0363247A1 - 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
EP0363247A1
EP0363247A1 EP89402601A EP89402601A EP0363247A1 EP 0363247 A1 EP0363247 A1 EP 0363247A1 EP 89402601 A EP89402601 A EP 89402601A EP 89402601 A EP89402601 A EP 89402601A EP 0363247 A1 EP0363247 A1 EP 0363247A1
Authority
EP
European Patent Office
Prior art keywords
seal
torch
nose
valve
cuff
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
EP89402601A
Other languages
English (en)
French (fr)
Other versions
EP0363247B1 (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
Original Assignee
Airbus Group SAS
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 Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0363247A1 publication Critical patent/EP0363247A1/de
Application granted granted Critical
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 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.
  • the object of the present invention is to provide another embodiment of a device for the implementation of this method.
  • a device for the placement of a plasma torch with arc not transferred on a cuff comprising a closing valve and connected to a device operating under conditions of high pressure and temperature, without modification of these conditions, as well as its withdrawal, characterized in that it comprises in combination at least one circular seal inserted between the internal wall of the cuff and the nose of the torch and surrounding the latter, means for balancing pressures on either side of the valve, and means for cooling the seal.
  • said 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.
  • 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 with 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)
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
FR8812898 1988-10-03
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

Publications (2)

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

Family

ID=9370621

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)

Citations (5)

* 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
US4477248A (en) * 1983-08-04 1984-10-16 Dulac Robert R Oil burner shutter
GB2166029A (en) * 1984-10-19 1986-04-23 Skf Steel Eng Ab The installation of plasma generators in shaft furnaces
GB2167843A (en) * 1984-12-03 1986-06-04 Skf Steel Eng Ab Sealing means for burners/reactors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1173784A (en) * 1981-07-30 1984-09-04 William H. Gauvin Transferred-arc plasma reactor for chemical and metallurgical applications
US4654504A (en) * 1983-11-30 1987-03-31 Hewlett-Packard Company Water-cooled gas discharge detector
US4659899A (en) * 1984-10-24 1987-04-21 The Perkin-Elmer Corporation Vacuum-compatible air-cooled plasma device
US4761793A (en) * 1987-05-08 1988-08-02 Electric Power Research Institute Plasma fired feed nozzle

Patent Citations (5)

* 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
US4477248A (en) * 1983-08-04 1984-10-16 Dulac Robert R Oil burner shutter
GB2166029A (en) * 1984-10-19 1986-04-23 Skf Steel Eng Ab The installation of plasma generators in shaft furnaces
GB2167843A (en) * 1984-12-03 1986-06-04 Skf Steel Eng Ab Sealing means for burners/reactors

Also Published As

Publication number Publication date
JPH02168597A (ja) 1990-06-28
JPH0665196B2 (ja) 1994-08-22
US4972063A (en) 1990-11-20
ES2042035T3 (es) 1993-12-01
DE68907306T2 (de) 1993-09-30
FR2637442B1 (fr) 1990-11-02
CA1311532C (fr) 1992-12-15
EP0363247B1 (de) 1993-06-23
DE68907306D1 (de) 1993-07-29
FR2637442A1 (fr) 1990-04-06

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