EP0730038A1 - Dispositif destiné à accoupler une poche de coulée à une ou à plusieurs conduites de gaz - Google Patents

Dispositif destiné à accoupler une poche de coulée à une ou à plusieurs conduites de gaz Download PDF

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Publication number
EP0730038A1
EP0730038A1 EP96103113A EP96103113A EP0730038A1 EP 0730038 A1 EP0730038 A1 EP 0730038A1 EP 96103113 A EP96103113 A EP 96103113A EP 96103113 A EP96103113 A EP 96103113A EP 0730038 A1 EP0730038 A1 EP 0730038A1
Authority
EP
European Patent Office
Prior art keywords
coupling
sealing plate
coupling part
conical
gas
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
EP96103113A
Other languages
German (de)
English (en)
Other versions
EP0730038B1 (fr
Inventor
Albert Feitler
Hubert Stomp
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0730038A1 publication Critical patent/EP0730038A1/fr
Application granted granted Critical
Publication of EP0730038B1 publication Critical patent/EP0730038B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the present invention relates to a coupling device for coupling a ladle to one or more gas lines.
  • the molten metal is tapped from the melting vessel into metallurgical vessels suitable for transport and casting. After-treatment of the molten metal to change the chemical composition often takes place in these ladles.
  • the liquid metal is flushed with gases which are blown into the ladle through a porous area in the bottom. The reaction products generated rise to the surface of the melt and are taken up by a slag there.
  • the ladle is inserted into a receiving device and connected to the gas supply lines there.
  • This connection of the gas supply lines should be done as automatically as possible, since the risk of an accident is very high for a worker in view of the harsh environment.
  • An automatic coupling device is known for example from European patent application EP-A-0 320 841.
  • a device is described in which the gas inlets in the upper coupling part are arranged in a conical depression, while the gas outlets in the lower part are seated in a cone with a rounded tip.
  • This type of coupling has the advantage that it is self-centering, but it is quite complex to manufacture.
  • a coupling device for coupling a metallurgical vessel to one or more gases which comprises a first and a second coupling part, the first coupling part being connected to a gas supply and the second coupling part being fastened to the ladle, and wherein the first coupling part has a sealing plate in which at least one gas outlet is made and the second coupling part comprises a sealing plate in which at least one gas inlet is designed such that when the device is coupled together, a gas outlet in the first coupling part and a gas inlet in the second coupling part are arranged axially opposite.
  • This coupling device is characterized in that the at least one gas outlet is conical and can be positively closed by a conical closing element, the conical closing element being arranged axially displaceably in the first coupling part and protruding from the conical gas outlet in the closed position in such a way that it couples when coupled the second coupling part is pressed inwards into the first coupling part.
  • the at least one gas outlet is opened automatically. This happens before the sealing plate of the second coupling part has been placed on the sealing plate of the first coupling part.
  • the gas flowing out of the gas outlet flows radially outward from the gas outlet in all directions. Since the gas supply lines are under high pressure, and the gap between the two coupling elements when opening the closing element is quite small, the speed of the gas flow is correspondingly high, so that contaminants, which are on the surface the sealing plate, be blown away from the coupling surface. Since this happens with every coupling of a ladle, in such short intervals that there is no incrustation of the deposits, they remain free-flowing and are entrained by the gas flow. In this way, permanent deposits are avoided, which can prevent the two coupling elements from stacking tightly against one another.
  • the conical shape of the gas outlet and the closing element additionally has the effect that when the device is uncoupled, the gas outlet is closed in a form-fitting manner.
  • the sealing plate of the first coupling part and the surface of the closing element no deep grooves form, in which impurities preferentially settle. This prevents contaminants from entering the gas outlet.
  • the conical shape of the two elements means that when the closing element is pushed into the first coupling part, the gap between the closing element and the gas outlet becomes larger the further the closing element is pressed into the coupling part. As a result, impurities which penetrate into the gap which forms when the gas inlet is opened cannot settle here, but are carried out of the gas inlet by the gas flow which begins.
  • the sealing plate of the first coupling part is convex on the coupling side, while the sealing plate of the second coupling part is concave on the coupling side.
  • the closing element is preferably axially displaceable in the gas outlet against elastic means, for example a helical spring, the elastic means sealingly pressing the closing element against the conical gas outlet when the device is uncoupled.
  • the cone-shaped closing element has an annular shoulder surface in which an annular soft seal is attached in such a way that the annular soft seal lies sealingly on an annular seat surface which surrounds the conical gas outlet when the cone-shaped closing element is positively seated in the conical gas outlet.
  • the sealing plate of the first coupling part is mounted in an axially displaceable manner in a housing, and elastic means, e.g. a coil spring is provided to support the sealing plate downward on a cover closing the housing, so that when the device is uncoupled the upper edge of the sealing plate protrudes beyond the upper edge of the housing, and when the device is coupled together, the sealing plate against the spring force of the elastic means into the Housing is pressed in, so that the sealing plate is pressed by the spring force of the means against the ring seals.
  • elastic means e.g. a coil spring
  • the sealing plate By prestressing the resilient means, the sealing plate is first pressed against the sealing surface of the second coupling part when coupling to the second coupling part with the spring force of the elastic means. Then the sealing plate moves axially into the housing. In contrast to a one-piece design of the first coupling part, the shock is thereby cushioned when the two coupling parts are placed one on top of the other, thereby protecting the entire device from impacts.
  • the gas inlet is preferably formed in a trough which is carried out in the sealing plate of the second coupling part.
  • this trough the gas flow from the open gas outlet is deflected during the cleaning phase and deflected radially in all directions. It also enables the Trough, when coupling the two coupling parts together, compensate for small inaccuracies in the horizontal alignment of the second coupling part above the first coupling part.
  • a gas inlet consists of a plurality of ring-shaped bores which are arranged in a circle around the point of contact of the corresponding closing element.
  • the point of contact for the closing element is thus formed by the area between the individual bores, which prevents the gas inlet from being closed by the tip of the closing element.
  • At least one annular seal is preferably provided around each gas inlet.
  • FIG. 1 and 2 show a coupling device according to the invention, with which a ladle can be connected to a gas supply.
  • the device consists of a first coupling part 10, which is connected to a gas supply 12, and a second coupling part 14, which is attached to the ladle 16.
  • the second coupling part 14 comprises a first plate 18 which is attached to the ladle 16.
  • This plate 18 is provided with a bore 20 which as Gas passage functions, and to which a pipe 22 connects at the top, which conducts the gas to the porous region of the ladle.
  • a sealing plate 24 is attached, which is preferably circular for manufacturing reasons.
  • This sealing plate 24 is also provided in its center with a bore 26 which is widened on the underside by unscrewing.
  • the sealing plate is mounted under the plate 18 such that the axis of the bore 20 and the axis of the bore 26, which is also the axis of the recess, lie one on top of the other.
  • An insert 28 is fitted into the recess, the top of which is flat and the bottom of which is concave.
  • several bores 30 are made in an annular surface around the axis (see also FIG. 3).
  • two ring seals 32 are inserted in the sealing plate 24, which seal off the space which forms between the concave underside of the insert 28 and the first coupling part 10 when the device is coupled together.
  • the first coupling part 10 comprises a tubular housing 34 which is closed at the bottom with a cover 36. An opening is made centrally in this cover 36, in which a gas bushing is arranged to be axially displaceable.
  • the gas lead-through comprises a sleeve 38 guided in the opening of the cover 36, on which a sealing plate 40 is attached at the top.
  • the diameter of the sealing plate 40 is chosen so that the sealing plate 40 fits into the tubular housing 34 of the first coupling part so that it can be tilted a few degrees in any direction from the horizontal position.
  • a stop plate 42 is fastened, which prevents the gas feedthrough from shifting so far through the opening of the cover 36 that the sealing plate 40 protrudes completely from the housing.
  • the guest feeder 12 connects to the stop plate 42, which is provided with a hole in the middle.
  • a coil spring 44 is mounted in the housing 34, which is supported downward against the cover 36.
  • the sealing plate 40 lies on top of the helical spring 44, the stop plate 42 causing the helical spring to be preloaded. In this case, when the device is uncoupled, the gas leadthrough is pushed so far up that the stop plate 42 abuts the cover 36 at the bottom, and the upper edge of the sealing plate 40 protrudes beyond the edge of the housing 34.
  • a conical gas outlet 46 (see FIG. 2) is designed at the top, which can be closed in a form-fitting manner by an automatically opening closing element 48.
  • This closing element 48 is frustoconical and has an annular shoulder 50 at the bottom, in which an annular soft seal 52 is attached in a dovetail groove.
  • This seal 52 sits on an annular seat surface 54 which surrounds the conical gas outlet 46 and additionally seals the gas outlet when the conical closing element 48 is positively seated in the conical gas outlet 46.
  • the closing element 48 is extended by a guide element 56 which has a cross-shaped horizontal cross section and which guides the valve arrangement without tilting in a second sleeve 58 which is pushed into the sleeve 38 at the bottom.
  • a second helical spring 60 is mounted coaxially to the guide element 48 in the sleeve 38, which is supported downward against the second sleeve 58 and on which the closing element 48 rests, whereby this is pressed against the gas outlet 46 in the uncoupled state.
  • the locking element 48 is designed such that its tip when the coupling parts are disengaged, i.e. when the closing element 48 is pressed against the gas outlet 46, it protrudes from the surface of the sealing plate 40 of the lower coupling part.
  • the sealing plate 24 and sealing plate 40 approach each other until the tip of the closing element 48 abuts the curved surface of the insert 28.
  • the closing element 48 is pressed down against the spring force of the coil spring 60 and opens before the ring seals 32 rest on the sealing plate 40, the gas escaping at high pressure through the gap formed between the closing element 48 and the gas outlet 46.
  • the gas flows at high speed against the curved surface of the insert 28, is partially deflected there and escapes radially in all directions. Dust and other contaminants located on the sealing plate 40 are blown away to the outside, thereby preventing the bores 30 and the gap between the closing element 48 and the gas outlet 46 from becoming blocked.
  • closing element 48 in contrast to a cylindrical closing element, with a conical closing element the gap between the closing element and its seat increases the further the closing element is pressed inwards. As a result, impurities cannot become stuck in the gap and consequently cannot clog it.
  • the upper sealing plate 24 rests on the lower sealing plate 40, and the ring seals 32 seal the space which forms between the concave underside of the insert 28 and the flat surface of the sealing plate 40 from the outside.
  • the gas flowing out of the gas outlet 46 is now passed through the bores 30 into the pipeline 22, and from there it reaches the ladle.
  • the ladle is now lowered so far that the upper sealing plate 24 rests on the upper edge of the housing 34.
  • the sealing plate 40 is pressed against the spring force of the helical spring 44 into the housing 34, which in turn builds up a contact force of the same amount, which presses the sealing plate 40 against the ring seals 32.
  • the closing element 48 automatically closing and sealing the gas outlet 46 under the spring force of the coil spring 60.
  • the coupling device according to the invention is of course not on a version with a gas inlet or. - outlet restricted. It is equally possible to provide two or more inserts with inlets and a corresponding number of gas outlets, these being arranged, for example, in an annular surface around the axis of the sealing plate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
EP96103113A 1995-03-03 1996-03-01 Dispositif destiné à accoupler une poche de coulée à une ou à plusieurs conduites de gaz Expired - Lifetime EP0730038B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU88595 1995-03-03
LU88595A LU88595A1 (de) 1995-03-03 1995-03-03 Vorrichtung zum automatischen Ankuppeln einer Giesspfanne an eine oder mehrere Gasleitungen

Publications (2)

Publication Number Publication Date
EP0730038A1 true EP0730038A1 (fr) 1996-09-04
EP0730038B1 EP0730038B1 (fr) 1998-08-26

Family

ID=19731520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103113A Expired - Lifetime EP0730038B1 (fr) 1995-03-03 1996-03-01 Dispositif destiné à accoupler une poche de coulée à une ou à plusieurs conduites de gaz

Country Status (5)

Country Link
EP (1) EP0730038B1 (fr)
AT (1) ATE170224T1 (fr)
DE (1) DE59600464D1 (fr)
ES (1) ES2121633T3 (fr)
LU (1) LU88595A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029912A1 (fr) * 1997-12-04 1999-06-17 Paul Wurth S.A. Dispositif d'accouplement pour l'accouplement d'une poche metallurgique a une ou plusieurs conduites d'alimentation
EP1602423A1 (fr) * 2004-06-02 2005-12-07 Mannesmannröhren-Werke GmbH Raccord pour l'accouplement d'une poche métallurgique aux conduits de gaz de traitement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT365958B (de) * 1980-06-30 1982-02-25 Voest Alpine Ag Metallurgisches gefaess
EP0070799A2 (fr) * 1981-07-22 1983-01-26 Schweizerische Aluminium Ag Buse de pulvérisation pour appareil de barbotage du métal fondu
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
US5065986A (en) * 1990-07-30 1991-11-19 Insul Company, Inc. Automatic gas hookup to a ladle
LU87868A1 (fr) * 1990-12-21 1992-08-25 Wurth Paul Sa Raccord rapide double flux pour l'accouplement automatique et simultane d'une poche metallurgique a deux reseaux de gaz differents

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT365958B (de) * 1980-06-30 1982-02-25 Voest Alpine Ag Metallurgisches gefaess
EP0070799A2 (fr) * 1981-07-22 1983-01-26 Schweizerische Aluminium Ag Buse de pulvérisation pour appareil de barbotage du métal fondu
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
US5065986A (en) * 1990-07-30 1991-11-19 Insul Company, Inc. Automatic gas hookup to a ladle
LU87868A1 (fr) * 1990-12-21 1992-08-25 Wurth Paul Sa Raccord rapide double flux pour l'accouplement automatique et simultane d'une poche metallurgique a deux reseaux de gaz differents

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029912A1 (fr) * 1997-12-04 1999-06-17 Paul Wurth S.A. Dispositif d'accouplement pour l'accouplement d'une poche metallurgique a une ou plusieurs conduites d'alimentation
EP1602423A1 (fr) * 2004-06-02 2005-12-07 Mannesmannröhren-Werke GmbH Raccord pour l'accouplement d'une poche métallurgique aux conduits de gaz de traitement

Also Published As

Publication number Publication date
DE59600464D1 (de) 1998-10-01
ATE170224T1 (de) 1998-09-15
ES2121633T3 (es) 1998-12-01
EP0730038B1 (fr) 1998-08-26
LU88595A1 (de) 1996-10-04

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