EP1885516B1 - Quenouille - Google Patents

Quenouille Download PDF

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Publication number
EP1885516B1
EP1885516B1 EP06744052A EP06744052A EP1885516B1 EP 1885516 B1 EP1885516 B1 EP 1885516B1 EP 06744052 A EP06744052 A EP 06744052A EP 06744052 A EP06744052 A EP 06744052A EP 1885516 B1 EP1885516 B1 EP 1885516B1
Authority
EP
European Patent Office
Prior art keywords
stopper rod
sealing means
carrier element
insert
rod body
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.)
Active
Application number
EP06744052A
Other languages
German (de)
English (en)
Other versions
EP1885516A2 (fr
Inventor
Mark Payne
Gerald Nitzl
Werner Schlottbohm
Horst-Günther HENRICH
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
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
Priority claimed from GB0511202A external-priority patent/GB0511202D0/en
Priority claimed from GB0523894A external-priority patent/GB0523894D0/en
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Publication of EP1885516A2 publication Critical patent/EP1885516A2/fr
Application granted granted Critical
Publication of EP1885516B1 publication Critical patent/EP1885516B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • 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
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt

Definitions

  • This invention relates to a stopper rod for controlling the flow of molten metal, for example from a vessel, such as a tundish, to a mould, and more preferably, to a stopper rod for supplying an inert gas to the melt in the vessel.
  • Such a stopper rod is well know, it being moved in the direction of its longitudinal axis by a lifting device external to the vessel in which the stopper rod is disposed, so that an outlet opening in the base of the vessel, into which the stopper rod fits at its lowest position, shutting it off completely, is opened either more or less. The flow of metal through the opening is thus controllable.
  • DE 91 09 536 U1 describes a stopper rod having a retention collar (28b).
  • a seal (26) is provided on the underside of the retention collar and ceramic sleeve (34) is provided on the upper side of the retention collar (28b).
  • a sealant substance (32) fills the annular space (30) around the retention collar (28b).
  • DE 40 40 189 C1 describes a stopper rod comprising a carrier tube (1) having a collar (23). A threaded sleeve (25) is located directly above the collar (23) and a single seal (15) is located above the threaded sleeve (25).
  • EP 0358535 describes a stopper rod comprising a metal rod (30) having an enlarged flange portion (46).
  • a sealing gasket (48) is provided on the frustoconical undersurface of the enlarged flange portion (46).
  • An object of the invention is to provide a stopper rod in an improved form.
  • a stopper rod comprising a refractory material stopper rod body having an internal passageway extending from a first end of the body towards a second end thereof, a metal carrier element having one of its ends received in said passageway, the carrier element having a laterally enlarged portion received in a laterally enlarged portion of the passageway, which passageway portion defines a seating surface, and sealing means between said seating surface and an underside of the laterally enlarged portion of the carrier element, wherein an insert is threadedly engaged with one of the carrier element and the stopper rod body at a position above said laterally enlarged portion of the carrier element, with further sealing means being disposed between said insert and the carrier element.
  • the carrier element which serves, in use, to connect the stopper rod to a lifting device, has a gas supply passage extending therethrough.
  • the sealing means is a graphoil seal.
  • the insert is threadedly engaged with the carrier element.
  • the further sealing means is a packing gland seal.
  • the insert is threadedly engaged with the stopper rod body.
  • the further sealing means is a graphoil seal, which is preferably thicker than the graphoil seal forming said sealing means.
  • the insert is threadedly engaged with a ceramic insert which is preferably pressed into the stopper rod to form part thereof.
  • the sealing means is disposed between complementary frustoconical surfaces respectively of the enlarged portion of the carrier element and said seating surface. Until the stopper rod heats up, the sealing means is compressed between the carrier element and the stopper rod body and provides a gas-tight seal therebetween. As the stopper rod heats up, gas tightness is maintained by the further sealing means, even if the seal provided by the sealing means starts to leak due to the expansion of the metal carrier element.
  • the insert is engaged with a complementary thread on the carrier element.
  • the insert is screwed down tightly on the further sealing means to effect radial sealing to the inner annular wall of the passageway of the stopper rod body.
  • the whole assembly simply slides up fractionally, but the force on the further sealing means, and hence the gas-tightness, is maintained.
  • the insert is a collar, which can be metallic or ceramic, threadedly engaged with a corresponding thread at an upper inner surface of the internal passageway in the stopper rod body.
  • the thread can be pressed in the stopper rod body passageway, or provided by a pressed-in ceramic insert forming part of the stopper rod body.
  • the insert is in the form of a nut screw-threadedly engaged on the carrier element, which nut, when tightened, effects axial compression of said further sealing means, resulting in sealing between the stopper rod body and the carrier element.
  • the nut preferably effects axial compression of said further sealing means through the intermediary of a washer.
  • the washer is located around the carrier element at one end of the stopper rod body.
  • the washer is larger than the further sealing means, and particularly of larger diameter than the diameter of the upper end of the internal passageway in the stopper rod body, in which upper end the further sealing means is received.
  • the further sealing means is preferably two graphoil seals which stand proud of said upper end of the stopper rod body when the nut is untightened, and are axially compressed into said upper end of the passageway when the nut is tightened onto the washer to cause the washer axially to compress the graphoil seals.
  • FIG. 2 The embodiment of the present invention shown in Figure 2 is designed to solve that problem.
  • all the features of the stopper rod shown in Figure 1 are present in Figure 2 and have accordingly been numbered identically, but with the suffix a.
  • an insert in the form of a nut 20 is threadedly engaged on the carrier rod 15a at a position somewhat above the upwardly facing surface of the cylindrical part 17 of the collar 16 so that, as shown, the upper face of the nut 20 is substantially flush with the upper face of the stopper rod body 11.
  • sealing means in the form, for example, of a packing gland seal 21 Between the lower end of the nut 20 and the upper surface of the cylindrical part 17 of the collar 16 is sealing means in the form, for example, of a packing gland seal 21.
  • this seal 21 would be compressed by the screwing down of the nut 20, even when the stopper rod is not heated, so that there some radial sealing as shown by the arrows at the seal 21 in Figure 2 . Accordingly instead of the bore 12 being open at above the collar 16 as in Figure 1 , this part of the bore 12 now receives the nut 20 and seal 21 as shown.
  • the stopper rod shown in Figure 3 comprises a refractory/ceramic stopper rod body 11b with a longitudinal bore 12b extending therethrough from its open upper end.
  • This upper laterally (radially) enlarged part of the bore 12b is formed with a seating surface 13b of frustoconical form, and spaced below this surface 13b there is pressed into the material of the body 11 a fixing insert 14b with which an externally threaded end of the metallic carrier rod 15b is engaged so that a lifting or lowering of the carrier rod will result in a corresponding lifting or lowering of the stopper rod in its vessel.
  • the carrier rod 15b which is preferably metallic, has a central gas passage 22 extending therethrough. It is provided externally with a collar 16b made up of an upper cylindrical part 17b and a lower part which has a frustoconical undersurface 18b. As with the Figure 2 arrangement, a seal 19b, preferably a graphoil seal, is trapped between the frustoconical surface 18b and the seating surface 13b to provide a gas tight seal when the stopper rod is unheated.
  • a seal 19b preferably a graphoil seal
  • a screw thread 23 is provided, for example by pressing, into the inner surface of the upper part of the bore 12b and an insert in the form of an annular collar 24 or equivalent is screw-threadedly engaged with the thread 23, there being, as shown, radial clearance between the inner cylindrical surface of the collar and the outer cylindrical surface of the carrier rod 15b.
  • This is in contrast to the Figure 2 arrangement, where this radial clearance can be provided between the external surface of the nut 20 and the inner cylindrical surface of the bore in which the nut is received.
  • the collar 24 is screwed down onto the seal 25 which is compressed thereby. Accordingly when the stopper rod is unheated, there is sealing both by way of the seal 19b and also by way of the seal 25, both of which seals are under compression. However as the stopper rod is heated, and the carrier rod 15b expands, the seal 19b is likely to start to leak in the normal manner as the compression thereof decreases due to the expansion of the carrier rod 15b. However the upper seal 25, which is restrained by the fixed screwed-in collar 24, will be subject to additional compressive forces between the expanding carrier rod 15b and the retained collar 24 to provide an effective gas-tight seal.
  • Figure 3 shows a conventional washer 26 on the carrier rod 15b at the top of the stopper rod body 11b, this washer being held down onto the top of the stopper rod body by a nut 27 which is screw threaded onto the carrier rod 15b, the washer and nut providing a conventional lock at the top of the stopper rod body.
  • the stopper rod of the invention shown in Figure 5 is similar in several respects to that shown in Figure 3 , having a stopper rod body 11c of refractory/ceramic material with a central, longitudinally extending circular cross-section bore 12c, which is open at the end of the stopper rod which is uppermost in use.
  • This upper laterally (radially) enlarged part of the bore 12c is formed with a seating surface 13c of frustoconical form, and spaced below this surface there is pressed into the material of the body 11c a (ceramic) fixing insert 14c with which an externally threaded end of the preferably metallic carrier element in the form of a rod 15c is engaged, so that a lifting or lowering of the carrier rod will result in a corresponding lifting or lowering of the stopper rod in its vessel.
  • the carrier rod 15c has a central gas passageway through it. It has an external collar 16c made up of an upper cylindrical part 17c and a lower part with a frustoconical undersurface 18c. A seal 19c, preferably a graphoil seal, is trapped between the surface 18c and the seating surface 13c to provide a gas tight seal when the stopper rod is unheated.
  • a conventional washer 26c is received on the carrier element, as with the Figure 3 embodiment, with a conventional insert in the form of a nut 27c, also as in the Figure 3 embodiment, being engaged on the screw thread 28, to force the washer downwardly when the nut is tightened.
  • the washer is of a diameter much greater than that of the bore 12c at the top of the stopper rod body.
  • the washer could be sized to be received in the upper end of bore 12c and thus at least partly received therein when it axially compresses the seals 25a, 25b.
  • the insert screw-threaded on the carrier rod, such as nut 27c could also at least partly be received in the bore 12c pressing down on the washer.
  • the further sealing means could, in any embodiment, be a single seal or any suitable number of seals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating Apparatus (AREA)
  • Lift Valve (AREA)

Abstract

Cette invention concerne une quenouille servant à commander le flux d'acier en fusion à partir d'un panier de coulée, cette quenouille comportant un élément transporteur de métal (15a; 15b; 15c) venant se loger partiellement dans un passage interne (12b; 12c) de la quenouille. Cet élément transporteur comprime un organe d'étanchéité (19a; 19b; 19c) entre une surface inférieure tronconique d'une partie latéralement élargie de l'élément transporteur et une surface de siège complémentaire du passage de la quenouille. A cet endroit est également prévu un insert (20; 24; 27c) qui vient se visser sur l'élément transporteur ou sur le corps de la quenouille dans une position située au-dessus d'une partie latéralement élargie de l'élément transporteur, un organe d'étanchéité supplémentaire (21; 25; 25a, 25b) étant disposé entre l'insert et l'élément transporteur. L'insert est de préférence constitué par un écrou (27c) venant se visser sur une rondelle (26c) qui comprime l'organe d'étanchéité supplémentaire (25a, 25b).

Claims (25)

  1. Quenouille, comprenant un corps de quenouille en matériau réfractaire (11a; 11b; 11c) comportant un passage interne (12b; 12c), s'étendant d'une première extrémité du corps (11a; 11b; 11c) vers une deuxième extrémité de celui-ci, un élément de support métallique (15a; 15b; 15c), dont l'une des extrémités est reçue dans ledit passage (12b; 12c), l'élément de support (15a; 15b; 15c) comportant une partie latéralement élargie reçue dans une partie latéralement élargie du passage, la partie du passage définissant une surface d'assise, et des moyens d'étanchéité (19a; 19b; 19c) entre ladite surface d'assise et un côté inférieur de la partie latéralement élargie de l'élément de support (15a ; 15b ; 15c), un insert (20 ; 24 ; 27c) étant engagé par filetage dans un élément, l'élément de support (15a ; 15b ; 15c) ou le corps de la quenouille (11a ; 11b ; 11c), au niveau d'une position située au-dessus de ladite partie latéralement élargie de l'élément de support (15a ; 15b ; 15c), des moyens d'étanchéité additionnels (21 ; 25 ; 25a ; 25b) étant agencés axialement entre ledit insert (20 ; 24 ; 27c) et l'élément de support (15a ; 15b ; 15c), de sorte qu'une compression axiale desdits moyens d'étanchéité additionnels (21 ; 25 ; 25a ; 25b) entraînent l'établissement d'une étanchéité radiale entre l'élément de support (15a ; 15b ; 15c) et le corps de la quenouille (11a ; 11b ; 11c).
  2. Quenouille selon la revendication 1, dans laquelle l'insert a la forme d'un écrou (20 ; 27c) engagé par filetage à vis dans l'élément de support (15a ; 15c), l'écrou entraînant, lors de son serrage, une compression axiale desdits moyens d'étanchéité additionnels, établissant l'étanchéité entre le corps de la quenouille et l'élément de support.
  3. Quenouille selon la revendication 2, dans laquelle l'écrou (27c) entraîne une compression axiale desdits moyens d'étanchéité additionnels (25a, 25b) par l'intermédiaire d'une rondelle (26c).
  4. Quenouille selon la revendication 3, dans laquelle la rondelle (26c) est agencée autour de l'élément de support (15c) au niveau d'une extrémité du corps de la quenouille (11c).
  5. Quenouille selon les revendications 3 ou 4, dans laquelle la rondelle (26c) est plus grande que les moyens d'étanchéité additionnels (25a, 25b).
  6. Quenouille selon la revendication 5, dans laquelle la rondelle (26c) a un diamètre supérieur au diamètre de l'extrémité supérieure du passage interne (12c) dans le corps de la quenouille (11c), l'extrémité supérieure recevant les moyens d'étanchéité additionnels.
  7. Quenouille selon l'une quelconque des revendications 3 à 6, dans laquelle les moyens d'étanchéité additionnels (25a, 25b) sont deux joints de graphite, débordant de ladite extrémité supérieure du corps de la quenouille (11c) lorsque l'écrou (27c) n'est pas serré, et comprimés axialement dans ladite extrémité supérieure du passage lorsque l'écrou (27c) est serré sur la rondelle (26c), pour entraîner une compression axiale des joints de graphite par la rondelle (26c).
  8. Quenouille selon l'une quelconque des revendications 1 à 7, dans laquelle les moyens d'étanchéité additionnels comprennent trois joints de graphite séparés.
  9. Quenouille selon l'une quelconque des revendications 1 à 8, dans laquelle l'élément de support (15a ; 15b ; 15c), servant en service à connecter la quenouille à un dispositif de levage, comporte une alimentation de gaz le traversant.
  10. Quenouille selon l'une quelconque des revendications 1 à 9, dans laquelle les moyens d'étanchéité (19a ; 19b ; 19c) sont un joint de graphite.
  11. Quenouille selon la revendication 1, dans laquelle l'insert (20 ; 27c) est engagé par filetage dans l'élément de support (15a ; 15c).
  12. Quenouille selon la revendication 11, dans laquelle le moyen d'étanchéité additionnel (21) est une garniture d'étanchéité.
  13. Quenouille selon la revendication 1, dans laquelle l'insert (24) est engagé par filetage dans le corps de la quenouille.
  14. Quenouille selon la revendication 13, dans laquelle le moyen d'étanchéité additionnel (25) est un joint de graphite.
  15. Quenouille selon la revendication 14, dans laquelle le joint de graphite est plus épais que le joint formant le moyen d'étanchéité.
  16. Quenouille selon la revendication 1, dans laquelle l'insert (24) est engagé par filetage dans un insert de céramique (28).
  17. Quenouille selon la revendication 16, dans laquelle l'insert de céramique (28) est pressé dans la quenouille, de sorte à constituer une partie de celle-ci.
  18. Quenouille selon l'une quelconque des revendications 1 à 17, dans laquelle les moyens d'étanchéité (19a ; 19b ; 19c) sont agencés entre des surfaces en tronc de cône respectivement complémentaires de la partie élargie de l'élément de support et de ladite surface d'étanchéité.
  19. Quenouille selon la revendication 18, dans laquelle, jusqu'à l'échauffement de la quenouille, les moyens d'étanchéité (19a ; 19b ; 19c) sont comprimés entre l'élément de support et le corps de la quenouille et établissent un joint étanche au gaz entre eux.
  20. Quenouille selon la revendication 11, dans laquelle l'insert (20 ; 27c) est engagé dans un filetage complémentaire sur l'élément de support (15a ; 15c).
  21. Quenouille selon la revendication 20, dans laquelle l'insert (20 ; 27c) est vissé fermement sur les moyens d'étanchéité additionnels (25 ; 25a ; 25b) pour établir l'étanchéité radiale de la paroi annulaire interne du passage du corps de la quenouille.
  22. Quenouille selon la revendication 13, dans laquelle l'insert (24) est un collier.
  23. Quenouille selon la revendication 22, dans laquelle le collier est composé de métal ou de céramique et est engagé par filetage dans un filetage correspondant (23a) au niveau d'une surface supérieure interne du passage interne dans le corps de la quenouille.
  24. Quenouille selon la revendication 23, dans laquelle le filetage (23a) est pressé dans le passage du corps de la quenouille.
  25. Quenouille selon la revendication 24, dans laquelle le filetage est établi par un insert inséré par pression (28), faisant partie du corps de la quenouille.
EP06744052A 2005-06-02 2006-06-01 Quenouille Active EP1885516B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0511202A GB0511202D0 (en) 2005-06-02 2005-06-02 Stopper rod
GB0523894A GB0523894D0 (en) 2005-11-24 2005-11-24 Stopper rod
PCT/GB2006/001991 WO2006129091A2 (fr) 2005-06-02 2006-06-01 Quenouille

Publications (2)

Publication Number Publication Date
EP1885516A2 EP1885516A2 (fr) 2008-02-13
EP1885516B1 true EP1885516B1 (fr) 2011-03-02

Family

ID=37027483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06744052A Active EP1885516B1 (fr) 2005-06-02 2006-06-01 Quenouille

Country Status (15)

Country Link
US (1) US20090152778A1 (fr)
EP (1) EP1885516B1 (fr)
JP (1) JP2008542032A (fr)
KR (1) KR20080016723A (fr)
AR (1) AR055963A1 (fr)
AT (1) ATE500012T1 (fr)
AU (1) AU2006253947A1 (fr)
BR (1) BRPI0610966A2 (fr)
CA (1) CA2610580A1 (fr)
DE (1) DE602006020436D1 (fr)
EA (1) EA200702645A1 (fr)
MX (1) MX2007015023A (fr)
TN (1) TNSN07451A1 (fr)
TW (1) TW200709873A (fr)
WO (1) WO2006129091A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5022054B2 (ja) * 2007-02-07 2012-09-12 黒崎播磨株式会社 ストッパー構造体およびその製造方法
KR100925440B1 (ko) 2008-01-28 2009-11-06 엘지전자 주식회사 물리 하이브리드 ａｒｑ 지시 채널 할당 방법
JP5107127B2 (ja) * 2008-04-23 2012-12-26 助川電気工業株式会社 溶融金属用電磁ポンプ
KR101482071B1 (ko) * 2014-09-03 2015-01-14 주식회사 영진이엠티 스토퍼 로드
KR101584135B1 (ko) 2015-07-09 2016-01-11 신일인텍 주식회사 스토퍼 로드

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946083A (en) * 1988-12-29 1990-08-07 Vesuvius Crucible Company One-piece stopper rod
DE4040189C1 (en) * 1990-12-15 1992-01-02 Didier-Werke Ag, 6200 Wiesbaden, De Ceramic plug for outlet from metallurgical vessel - has supporting pipe with annular space to form sealing face, and nut is screwed onto it through which gas is delivered
DE9109532U1 (de) * 1991-08-01 1991-10-10 Radex-Heraklith Industriebeteiligungs AG, Wien Gasblasender Stopfen
DE9109536U1 (de) 1991-08-01 1991-09-26 Kissner, Walter, 6000 Frankfurt Schultertasche

Also Published As

Publication number Publication date
ATE500012T1 (de) 2011-03-15
EP1885516A2 (fr) 2008-02-13
KR20080016723A (ko) 2008-02-21
JP2008542032A (ja) 2008-11-27
WO2006129091A2 (fr) 2006-12-07
US20090152778A1 (en) 2009-06-18
TW200709873A (en) 2007-03-16
AU2006253947A1 (en) 2006-12-07
EA200702645A1 (ru) 2008-04-28
CA2610580A1 (fr) 2006-12-07
MX2007015023A (es) 2008-02-07
BRPI0610966A2 (pt) 2019-05-14
AR055963A1 (es) 2007-09-12
TNSN07451A1 (en) 2009-03-17
DE602006020436D1 (de) 2011-04-14
WO2006129091A3 (fr) 2007-01-18

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