EP0382878A1 - Obturateur coulissant - Google Patents

Obturateur coulissant Download PDF

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Publication number
EP0382878A1
EP0382878A1 EP89109008A EP89109008A EP0382878A1 EP 0382878 A1 EP0382878 A1 EP 0382878A1 EP 89109008 A EP89109008 A EP 89109008A EP 89109008 A EP89109008 A EP 89109008A EP 0382878 A1 EP0382878 A1 EP 0382878A1
Authority
EP
European Patent Office
Prior art keywords
plate
springs
hole
tundish
slide gate
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
EP89109008A
Other languages
German (de)
English (en)
Other versions
EP0382878B1 (fr
Inventor
Roberto Ing. Pescatori
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.)
Nuova Sirma SpA
Original Assignee
Nuova Sirma SpA
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 Nuova Sirma SpA filed Critical Nuova Sirma SpA
Publication of EP0382878A1 publication Critical patent/EP0382878A1/fr
Application granted granted Critical
Publication of EP0382878B1 publication Critical patent/EP0382878B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/40—Means for pressing the plates together

Definitions

  • This invention relates to an improved three-plate slide gate for a tundish.
  • slide gates are known for application to the tundish in order to control the molten metal jet running into the ingot mould.
  • Slide gates comprising three superposed plates are particularly known, in which the two outer plates are fixed and each provided with a hole coaxial to that of the other plate, whereas the intermediate plate, also provided with a hole, is mobile longitudinally between the two fixed plates to enable its hole to be aligned with the holes of these latter and thus establish continuity of passage for the molten metal towards the ingot mould.
  • the main object of the invention is to reduce this drawback by providing a three-plate slide gate, particularly for a tundish, in which a substantial seal is provided between the adjacent plates.
  • a three-plate slide gate particularly for a tundish, in which a substantial seal is provided between the adjacent plates.
  • slide gates it is very difficult for the mobile plate to move relative to the fixed plates under conditions of perfect mutual translation. In this respect, undesirable stresses arise leading to abnormal movementes having componentes at an angle to the longitudinal slide plane of the mobile plate.
  • a further object of the invention is to obviate or at least reduce this drawback, at least when the degree of wear between the plates is still small:
  • a further drawback of known slide gates is that as a result of all these stresses, deformations and expansions to which the plates are subjected, a longitudinal crack often forms on the mobile plate, beginning at the casting hole and extending along the centre axis of the plate.
  • This crack also becomes a repository for molten steel, which then solifieds and under the effect of the movement of the plate and the thermal stresses to which it is subjected increases the phenomenon until the plate is made unserviceable.
  • a further object of the invention is to also obviate this drawback.
  • an improved three-plate slide gate particularly for a tundish, of the type comprising two fixed plates rigid with the tundish and provided with a coaxial hole, and, interposed therebetween, a mobile plate provided with a hole and supported by a frame driven in such a manner as to cause said plate to slide longitudinally between a position in which its hole is aligned with those of the two fixed plates and a position of non-alignment, and a plurality of springs acting in the sense of urging the lower fixed plate against the upper fixed plate to provide sealed contact between the corresponding surfaces of the fixed plates and mobile plate substantially for any position of this latter, characterised in that the springs are transversely fixed with respect to the tundish and have their lines of action lying within the longitudinal dimensions of the mobile plate for any position of this latter.
  • the slide gate according to the invention is of conventional three-plate type, of which the two outer plates are fixed to the tundish 3 while the intermediate plate 4 is mobile tangentially to these.
  • the upper fixed plate 1 is directly secured to the outer metal container of the tundish 3, whereas the lower fixed plate 2 is secured to a structure 5, itself fixed to said tundish 3.
  • Both the fixed plates 1,2 are provided with a passage hole 6,6 for the molten metal, the two being equal and coaxial.
  • the mobile plate 4 is mounted sustantially as an exact fit in a perimetral frame 7 secured to the drive and guide members (not shown) for tangentially moving said mobile plate relative to the adjacent fixed plates 1,2.
  • the mobile plate 4 is also provided with a casting hole 8, the movements of this mobile plate being such that when in one of its two end positions the hole 8 is coaxial to the holes 6,6' of the fixed plate 1,2, whereas when in the other end position the hole of the mobile plate faces portions of the fixed plates not comprising the relative hole.
  • the springs 11 are disposed about the casting hole 6 at a distance therefrom such that, taking into account the longitudinal dimensions of the mobile plate 4, their line of action falls within the longitudinal dimensions of said mobile plate for any position thereof.
  • the grub screws 9 are tightened to keep the plate "compacted", for the dual purpose of reducing the risk of crack formation and of slowing the rate of propagation of any which may have formed.
  • the purpose of the springs 11 is to take up any slack between the plates 1,2,4, their action extending over all three plates about the casting holes 6,6 8 and therefore helping to provide an effective seal, even in the case of possible plate deformation.
  • the combined effect of the springs 11 and screws 10 ensures an effective seal between the plates for any relative position thereof, this on the one hand preventing carburization of their mutually contactiong surfaces and on the other hand preventing the entry of air drawn in from the outside with consequent oxidation of the jet of molten metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Elevator Door Apparatuses (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Drawers Of Furniture (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Container Filling Or Packaging Operations (AREA)
EP89109008A 1989-02-15 1989-05-19 Obturateur coulissant Expired - Lifetime EP0382878B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8984112A IT1234484B (it) 1989-02-15 1989-02-15 Otturatore a cassetto perfezionato a tre piastre, particolarmente per paniera.
IT8411289 1989-02-15

Publications (2)

Publication Number Publication Date
EP0382878A1 true EP0382878A1 (fr) 1990-08-22
EP0382878B1 EP0382878B1 (fr) 1994-08-31

Family

ID=11324168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109008A Expired - Lifetime EP0382878B1 (fr) 1989-02-15 1989-05-19 Obturateur coulissant

Country Status (6)

Country Link
EP (1) EP0382878B1 (fr)
AT (1) ATE110605T1 (fr)
DE (1) DE68917899T2 (fr)
ES (1) ES2060693T3 (fr)
IT (1) IT1234484B (fr)
ZA (1) ZA898380B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009390A1 (fr) * 1990-11-21 1992-06-11 The Broken Hill Proprietary Company Limited Coulee continue de metal fondu
GB2271734A (en) * 1992-10-23 1994-04-27 Tokyo Yogyo Kk Sliding nozzle for molten steel receiving vessel
DE10033904A1 (de) * 2000-07-12 2002-01-31 Stopinc Ag Huenenberg Schieberverschluss zum Vergiessen von Metallschmelze, sowie eine dazugehörige feuerfeste Platteneinheit
JP2016064439A (ja) * 2014-09-25 2016-04-28 黒崎播磨株式会社 スライディングノズル装置におけるスライド金枠の開閉構造

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1923045A1 (de) * 1968-05-21 1969-11-27 United States Steel Corp Giessgefaess mit Bodenausguss
US3765579A (en) * 1972-05-10 1973-10-16 United States Steel Corp Linearly movable gate mechanism
DE2342876A1 (de) * 1972-07-26 1974-03-28 Uss Eng & Consult Sperrschiebervorrichtung fuer stranggiesskokillen
FR2332831A1 (fr) * 1975-11-26 1977-06-24 Kurosaki Refractories Co Procede d'application d'une pression desiree d'etancheite entre les plaques refractaires d'une buse coulissante
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
US4660749A (en) * 1984-09-11 1987-04-28 Kurosaki Refractories Co., Ltd. Sliding nozzle apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1923045A1 (de) * 1968-05-21 1969-11-27 United States Steel Corp Giessgefaess mit Bodenausguss
US3765579A (en) * 1972-05-10 1973-10-16 United States Steel Corp Linearly movable gate mechanism
DE2342876A1 (de) * 1972-07-26 1974-03-28 Uss Eng & Consult Sperrschiebervorrichtung fuer stranggiesskokillen
FR2332831A1 (fr) * 1975-11-26 1977-06-24 Kurosaki Refractories Co Procede d'application d'une pression desiree d'etancheite entre les plaques refractaires d'une buse coulissante
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
US4660749A (en) * 1984-09-11 1987-04-28 Kurosaki Refractories Co., Ltd. Sliding nozzle apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009390A1 (fr) * 1990-11-21 1992-06-11 The Broken Hill Proprietary Company Limited Coulee continue de metal fondu
GB2271734A (en) * 1992-10-23 1994-04-27 Tokyo Yogyo Kk Sliding nozzle for molten steel receiving vessel
US5360147A (en) * 1992-10-23 1994-11-01 Tokyo Yogyo Kabushiki Kaisha Sliding nozzle for molten steel receiving vessel
GB2271734B (en) * 1992-10-23 1995-08-09 Tokyo Yogyo Kk Sliding nozzle for molten steel receiving vessel
DE10033904A1 (de) * 2000-07-12 2002-01-31 Stopinc Ag Huenenberg Schieberverschluss zum Vergiessen von Metallschmelze, sowie eine dazugehörige feuerfeste Platteneinheit
JP2016064439A (ja) * 2014-09-25 2016-04-28 黒崎播磨株式会社 スライディングノズル装置におけるスライド金枠の開閉構造

Also Published As

Publication number Publication date
ES2060693T3 (es) 1994-12-01
ZA898380B (en) 1990-06-27
IT1234484B (it) 1992-05-18
ATE110605T1 (de) 1994-09-15
DE68917899D1 (de) 1994-10-06
DE68917899T2 (de) 1995-01-12
EP0382878B1 (fr) 1994-08-31
IT8984112A0 (it) 1989-02-15

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