EP0128841B1 - Type de porte d'une tuyère rotative - Google Patents

Type de porte d'une tuyère rotative Download PDF

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Publication number
EP0128841B1
EP0128841B1 EP84401211A EP84401211A EP0128841B1 EP 0128841 B1 EP0128841 B1 EP 0128841B1 EP 84401211 A EP84401211 A EP 84401211A EP 84401211 A EP84401211 A EP 84401211A EP 0128841 B1 EP0128841 B1 EP 0128841B1
Authority
EP
European Patent Office
Prior art keywords
frame
stationary
door frame
plate brick
door
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
Application number
EP84401211A
Other languages
German (de)
English (en)
Other versions
EP0128841A1 (fr
Inventor
Wakabayashi Senzo
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.)
Kokan Kikai Kogyo KK
Nippon Rotary Nozzle Co Ltd
JFE Engineering Corp
TYK Corp
Original Assignee
Kokan Kikai Kogyo KK
Nippon Rotary Nozzle Co Ltd
Nippon Kokan Ltd
TYK Corp
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 Kokan Kikai Kogyo KK, Nippon Rotary Nozzle Co Ltd, Nippon Kokan Ltd, TYK Corp filed Critical Kokan Kikai Kogyo KK
Publication of EP0128841A1 publication Critical patent/EP0128841A1/fr
Application granted granted Critical
Publication of EP0128841B1 publication Critical patent/EP0128841B1/fr
Expired 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
    • B22D41/26—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 characterised by a rotatively movable plate

Definitions

  • This invention relates to a door type rotary nozzle and more particularly to a door type rotary nozzle mounted to the bottom discharge opening of the molten metal container such as ladle or tundish for controlling the amount of molten metal discharge through said discharge opening through adjustment of the opening degree thereof.
  • Rotary nozzles are widely used in conjunction with ladle adapted for receiving and transferring the molten steel tapped from the converter or pouring the same into metal molds, or in conjunction with tundish adapted for receiving molten metal tapped from the ladle and pouring the metal into molds.
  • the door type rotary nozzle which has enabled the rotary part inclusive of the sliding plate brick to be opened and closed through attachment by a hinge, has come into widespread use because of a number of advantages proper thereto such that the sliding surface can be exposed for inspection with naked eyes on the state of the plate surface of the stationary bottom plate brick or the sliding plate brick once the valve is opened, and that there is no need to have spare sets in store when the brick is exchanged or repaired, thus facilitating the exchange operation.
  • a door frame inclusive of a sliding plate brick is pivotably mounted by a hinge to stationary frame which is secured, either directly or through the medium of mounting member, to the bottom molten metal discharge opening of the ladle or tundish (hereafter referred to as molten steel ladle).
  • the opening degree of the nozzle is adjusted by transmitting the rotary power from the driving source such as motor through a speed reducing gear and/or counter gear to the sliding plate brick arranged in the door frame, that is by rotating the sliding plate brick.
  • Resilient means are provided within the door frame for pressing the sliding plate brick to the stationary bottom plate brick for preventing an accident such as leakage of molten metal due for example to the penetration of molten metal from the bore edge portion into the sliding surfaces of the sliding and stationary bottom plate bricks.
  • the force of reaction of these resilient means is supported by the stationary frame through the door frame and the hinge.
  • the force of these resilient means render it difficult to disengage the dogs locking the door frame to the stationary frame.
  • these resilient means need be forcedly compressed in advance from the bottom of the door frame as by jack for disengaging the dogs.
  • the present invention provides an improved door type rotary nozzle in which retention and compression of the resilient means may be effected simultaneously. It is a principal object of the present invention to provide for safe, reliable and simplified opening or closing operation of the door frame, and also to enable the opening or closing operation to be effected through the use of the commonplace jack to the exclusion of the complicated additional structure.
  • the door type rotary nozzle of the present invention is comprised of a stationary bottom plate brick having a nozzle bore in register with a molten metal discharge opening at the bottom of a molten metal container such as ladle ortundish; a stationary frame mounted to the bottom of said container for attaching said stationary bottom plate brick to a portion of said discharge opening, an annular door frame displaceably mounted to said stationary frame; hinge means for pivotably connecting said door frame with said stationary frame; a sliding plate brick having another nozzle bore capable of communicating with said nozzle bore of said stationary bottom plate brick when the sliding plate brick is in surfacial contact with said stationary bottom plate brick; an inner frame supported within said door frame and adapted for holding said sliding plate brick in surfacial contact with said stationary bottom plate brick when said door frame is closed, said inner frame being adapted to permit a molten metal discharging collector nozzle to be removably attached thereto within the annular inner periphery of said door frame so that the collector nozzle is in communication with the nozzle bore in said sliding plate brick;
  • the dogs When opening the door frame, it is required that the dogs be released from the force of reaction of the resilient means supported by the stationary frame through said dogs.
  • the lug pairs are clamped together by a jack or the like means for forcedly compressing the resilient means.
  • the jack or the like may remain in the clamping state for maintaining the integrity of the door and inner frames thereby preventing separation thereof from each other.
  • a plurality of lug pairs are mounted symmetrically to one another to the annular inner wall region of said door frame for facing to the axis of rotation of said inner frame.
  • the drive mechanism includes an externally threaded annular gear rotor rotatably supported at the outer periphery of said stationary frame, said dogs are engaged with said rotor and said dogs are adapted for being rotated integrally by said rotor together with said inner frame and said sliding plate brick.
  • the molten metal outlet at the bottom of a molten metal container (1 such as ladle or tundish is generally equipped with an upper nozzle (2) made of a molded article of refractory material.
  • the door-type rotary nozzle of the present invention is provided for controlling the opening or closure of the molten metal flowing from the upper nozzle (2).
  • Numeral (3) designates a base member for fixedly supporting the rotary nozzle of the present invention. On the base (3) is secured a stationary frame (5) adapted for holding a stationary bottom plate brick (4) in communication with the upper nozzle (2).
  • the bottom plate brick (4) in the stationary frame (5) has a nozzle bore (4a) in register with a nozzle opening (2a) of the upper nozzle (2) in the assembled state and is replaceably secured within the stationary frame (5) by retainer (6) or screws, not shown.
  • An externally threaded outergear rotor (8) is provided to the outer periphery of the stationary frame (5) through the intermediary of bearing (7) and driven in rotation by driving means, not shown.
  • An annular member (9) is integrally connected with gear rotor (8) and has on its outer periphery a flange (10) for engagement by six dogs (19) at six peripheral positions and on its inner periphery projections for direct transmission of the rotary power, to an inner frame (14) to be later described, with a hinge (12) being mounted to one end of the periphery of the annular member (9).
  • a hinge (12) carries the annular door frame (13) for opening or closure with respect to the annular member (9) of the stationary frame (5).
  • the inner frame (14) is supported in the door frame (13) by springs (15).
  • Numeral (16) designates a sliding plate brick replaceably secured to the inner frame (14) by retainer (17) or screws (18) and has two separate nozzle bores (16a), (16b) that may be brought into or out of communication with nozzle bore (4a) of the stationary bottom plate brick (4) when the sliding plate brick is in surfacial contact with the stationary bottom plate brick (4).
  • the inner frame (14) operates in such a manner that, when the door frame (13) is closed with respect to the annular member (9 of the stationary frame (5), the sliding plate brick (16) is brought into surfacial contact with the stationary bottom plate brick (4), the brick (16) being pressed by the spring force of the springs (15) against the stationary bottom plate brick (4) for realizing a sufficient surfacial contact pressure of the said surfacial contact lest the metal penetration should take place.
  • These dogs (19) are pivotably mounted to the door frame (13) and the foremost parts thereof are engaged by the flange (10) provided to the outer periphery of the annular member (9) of the stationary frame (5).
  • a hand grip (20) is provided to the tail part of the dog (19) for engaging or disengaging the dogs.
  • the springs (15) are mounted in an annular peripheral chamber (21) of the door frame (13) for resiliently acting between the door frame (13) and the inner frame (14).
  • These springs (15) are coil springs and guide-stopper members (22) are disposed in the inner zone of the springs as shown in Figure 2 for guiding and preventing excessive flexure caused to the springs (15).
  • two collector nozzles (23a), (23b) are adapted to be attached at the side of the lower surface of the inner frame (14) in communication with nozzle bores (16a), (16b).
  • (24a), (24b) designate bayonet type mounting cases adapted therefor and (25a), (25b) bayonet type holding socket integrally mounted with the inner frame (14).
  • each lug pair consists of a pair of lugs (26a), (26b), superimposed one upon the other with a gap (G) therebetween.
  • One lug (26a) projects integrally from door frame (13) and the other lug (26b) projects integrally from the inner frame (14).
  • the gap (G) is larger than the gap (g) between the upper surface of door frame (13) and the lower surface of inner frame (14) or than the gap (gs) between the stoppers (22) and, when the lugs are forced to draw near to each other against the force of springs (15) by the operation of a hydraulic jack (30) and a U-bolt base (31) as shown in Figure 3 for compressing the springs (15), the door frame (13) approaches to the annular member (9) of the stationary frame (5) to the extent that the dogs (19) can be lightly disengaged by hand.
  • the other lug pair (27) is constructed similarly to the lug pair (26) described above.
  • Jack operation is effected at two positions symmetrical with respect to the center of rotation (28) for balanced compression of the peripherally distributed springs (15) while simultaneously the jack and the base are operated for maintaining the compressed state so that the door frame (13) are not disengaged from the inner frame (14) even when the dogs (19) are disengaged and the door is opened by hinge (12).
  • the inner frame (14) has a recess (29) matching with a projection (11) on the inner periphery of the annular member (9) when the door frame is closed and that, when the gear rotor (8) is rotated by a driving gear, not shown, with the door frame (13) closed and the dogs (19) engaged, the force of rotation is transmitted from the annular member (9) to the inner frame (14) through projection (11) and recess (29) and thus the inner frame (14) and hence the sliding plate brick (16) are rotated relative to the stationary frame (5) and hence with respect to the stationary bottom plate brick (4) with door frame (13) being engaged by dogs (19) and without generating inner stress in the remaining portions, the opening degree of communication between the nozzle bores (4a), (16a) being adjusted in this manner from full closure to full opening.
  • lug pairs are provided to the inner periphery of the annular door frame (13) between collector nozzles and adapted to be drawn forcedly towards each other by a small sized jack for compressing the springs (15).
  • the door frame- and the inner frame may be maintained under compression without providing cumbersome protruding parts around the rotating parts that may interfere with rotation thereof thus greatly contributing to the safety in the repair or replacement of bricks and improved operating efficiency.
  • a larger force is not required in engaging or disengaging the dogs, the grip need not be of sturdy construction but a grip of reduced length is sufficient thus dispensing with useless protruding portions.
  • pressure is applied to the lug pair by hydraulic jack (30) and the U-bolt base (31).
  • the hydraulic jack may be replaced by screw jack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Claims (3)

1. Une buse rotative du type-porte fixée sur un orifice inférieur de décharge d'un récipient de métal fondu tel qu'une poche ou une cuve de coulée, qui comprend une brique plane inférieure stationnaire (4) pourvue d'un orifice de buse (4a) coïncidant avec un orifice de décharge (2a) de métal fondu qui est ménagé dans le fond d'un récipient de métal fondu, comme une poche ou une cuve de coulée; un châssis stationnaire (5) monté sur le fond dudit récipient de façon à fixer ladite brique plane inférieure stationnaire sur une partie dudit orifice de décharge; un châssis de porte annulaire (13) monté, avec possibilité de déplacement, sur ledit châssis stationnaire; un moyen à charnière (12) pour relier de façon pivotante ledit châssis de porte avec ledit châssis stationnaire; une brique plane coulissante (16) comportant un autre orifice de buse (16a, 16b) capable de communiquer avec ledit orifice de buse (4a) de ladite brique plane inférieure stationnaire; un châssis intérieur (14) supporté à l'intérieur dudit châssis de porte et adapté pour maintenir ladite brique plane coulissante en contact surfacique avec ladite brique plane inférieure stationnaire quand ledit châssis de porte est fermé, ledit châssis intérieur étant adapté pour permettre la fixation démontable sur celui-ci d'une buse collectrice de décharge de métal fondu à l'intérieur de la périphérie intérieure annulaire dudit châssis de porte (13), de telle sorte que la buse collectrice soit en communication avec l'orifice de buse ménagé dans ladite brique plane coulissante; une pluralité de taquets (19) montés de façon pivotante sur la périphérie extérieure dudit châssis de porte (13) et maintenant le châssis de porte fermé par application contre ledit châssis stationnaire; des moyens élastiques (15) montés de façon élastique entre ledit châssis de porte (13) et ledit châssis intérieur (14) et adaptés pour pousser en direction de ladite brique plane stationnaire (4) ladite brique plane coulissante (16) qui est en contact surfacique avec ladite brique plane inférieure stationnaire quand ledit châssis de porte est fermé, d'une manière telle que la force résultante de réaction élastique soit supportée par ledit châssis stationnaire par l'intermédiaire desdits taquets maintenus accrochés avec ledit châssis stationnaire; et un mécanisme (8) d'entraînement adapté pour entraîner en rotation ledit châssis intérieur (14) à partir de l'extérieur en obligeant ainsi ladite brique plane coulissante à tourner par rapport à ladite brique plane stationnaire pendant que ledit châssis de porte reste fermé, et elle est caractérisée en ce que des paires de pattes (26, 27) sont fixées sur ledit châssis de porte et sur ledit châssis intérieur à l'intérieur de la périphérie intérieure annulaire dudit châssis de porte et en opposition mutuelle et sont soumises à une force extérieure agissant de façon à comprimer lesdits moyens élastiques quand ledit châssis de porte est ouvert.
2. La buse rotative du type-porte telle que définie dans la revendication 1, caractérisée en ce qu'une pluralité desdites paires de pattes sont montées symétriquement l'une par rapport à l'autre sur la zone de paroi annulaire dudit châssis de porte de façon à être dirigées vers le centre de rotation dudit châssis intérieur.
3. La buse rotative du type-porte selon la revendication 1, caractérisée en ce que lesdits moyens d'entraînement dudit châssis intérieur comprennent un rotor formant couronne annulaire à denture extérieure (8) fileté extérieurement et supporté de façon tournante sur la périphérie extérieure dudit châssis stationnaire (5), lesdits taquets (19) étant accrochés avec ledit rotor et lesdits taquets de châssis de porte (13) étant adaptés pour être entraînés en rotation à l'unisson par ledit rotor en même temps que ledit châssis intérieur (14) et ladite brique plane coulissante (16).
EP84401211A 1983-06-13 1984-06-13 Type de porte d'une tuyère rotative Expired EP0128841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP104093/83 1983-06-13
JP10409383A JPS59228971A (ja) 1983-06-13 1983-06-13 扉式ロ−タリ−ノズル

Publications (2)

Publication Number Publication Date
EP0128841A1 EP0128841A1 (fr) 1984-12-19
EP0128841B1 true EP0128841B1 (fr) 1987-03-04

Family

ID=14371502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401211A Expired EP0128841B1 (fr) 1983-06-13 1984-06-13 Type de porte d'une tuyère rotative

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EP (1) EP0128841B1 (fr)
JP (1) JPS59228971A (fr)
DE (1) DE3462445D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500865A1 (de) * 1985-01-12 1986-07-17 Stopinc Ag, Baar Schiebeverschluss, insbesondere fuer stahlschmelze enthaltende gefaesse
CA1279189C (fr) * 1985-11-18 1991-01-22 Tetsuya Yoshihara Systeme de buse tournante
JPS63215366A (ja) * 1987-03-03 1988-09-07 Nkk Corp 扉式ロ−タリ−ノズル
JPH01163262U (fr) * 1988-05-07 1989-11-14
JPH0252165A (ja) * 1988-08-12 1990-02-21 Nippon Rootarii Nozuru Kk ロータリーノズル
DE3843865C1 (fr) * 1988-12-23 1990-02-22 Martin & Pagenstecher Gmbh, 5000 Koeln, De
JPH0387963U (fr) * 1989-12-25 1991-09-09
JP4216244B2 (ja) 2004-11-11 2009-01-28 品川白煉瓦株式会社 鋳造設備におけるスライドバルブ装置
CN108160982B (zh) * 2018-02-09 2024-04-30 马鞍山市双益机械制造有限公司 一种钢包滑动水口装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453698A1 (fr) * 1979-04-13 1980-11-07 Nippon Kokan Kk Tuyere tournante d'obturation pour poche de fonderie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH640442A5 (de) * 1979-05-25 1984-01-13 Stopinc Ag Drehschiebeverschluss fuer metallurgische gefaesse, insbesondere stahlgiesspfannen.
GB2117489B (en) * 1982-03-05 1985-06-05 Nippon Kokan Kk Dual door type rotary nozzle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453698A1 (fr) * 1979-04-13 1980-11-07 Nippon Kokan Kk Tuyere tournante d'obturation pour poche de fonderie

Also Published As

Publication number Publication date
JPS6230069B2 (fr) 1987-06-30
EP0128841A1 (fr) 1984-12-19
JPS59228971A (ja) 1984-12-22
DE3462445D1 (de) 1987-04-09

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