EP0683706B1 - Giessrohr - Google Patents

Giessrohr Download PDF

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Publication number
EP0683706B1
EP0683706B1 EP94903708A EP94903708A EP0683706B1 EP 0683706 B1 EP0683706 B1 EP 0683706B1 EP 94903708 A EP94903708 A EP 94903708A EP 94903708 A EP94903708 A EP 94903708A EP 0683706 B1 EP0683706 B1 EP 0683706B1
Authority
EP
European Patent Office
Prior art keywords
tube
collar
tubular element
thickness
casting
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 - Lifetime
Application number
EP94903708A
Other languages
English (en)
French (fr)
Other versions
EP0683706A1 (de
Inventor
Stanislav Szadkowski
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.)
International Industrial Engineering SA
Original Assignee
International Industrial Engineering 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 International Industrial Engineering SA filed Critical International Industrial Engineering SA
Publication of EP0683706A1 publication Critical patent/EP0683706A1/de
Application granted granted Critical
Publication of EP0683706B1 publication Critical patent/EP0683706B1/de
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
    • B22D41/50—Pouring-nozzles
    • 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
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to a pouring tube comprising a tubular element having at an upper end, a perfectly flat upper face intended to slide in a device for feeding and changing the tube or a regulating device along the fixed underside of a reference or movable refractory plate of a drawer plate, the assembly of the upper end of the tubular element being reinforced by a collar and by a metal protective casing.
  • Document WO 89/02800 discloses a pouring tube for a sliding closure device formed from two separate parts generally made of different refractory ceramic materials.
  • the first part is a sliding tube plate made of alumina or magnesia, having a perfectly flat upper face intended to slide along a sliding plane
  • the second part is a cylindrical tubular element provided with a flange integral with the tubular element intended to be immersed in a mold.
  • the plate is attached to the tubular element by juxtaposition.
  • the clamping face of the seal between the insert plate and the flange is flat or interlocking. It is generally a simple nesting.
  • the flange and an upper part of the tubular element are covered with a protective metal casing, while the attached plate and the flank of the flange are enclosed in a hoop ring.
  • This embodiment in two separate parts, one of which is a plate, makes it possible to machine the sliding surface by grinding. A perfectly smooth sliding surface minimizes metal infiltration into the sliding plane.
  • This composite tube lies in the fact that the production of two flat surfaces is easier than that of an annular projection and a complementary groove.
  • Document FR-A-2241359 also discloses a submerged pouring tube having a channel of elliptical section, the wall of which has an increased thickness at the level of the major axis. This additional thickness is constant over the entire length of the pouring tube.
  • the oval-conical nozzle has a cross section of oval external shape as well as a flow channel of internal section of similar oval shape so that at the same section, the thickness of the wall is the same in all directions.
  • Vulnerable part of known pouring tubes is located at the level of the collar. This is where the mechanical reaction torque is exerted when changing the tube.
  • the plunging part of the tube moved parallel to itself from the standby position to the service position is in fact held back by the viscosity of the molten metal bath in the mold.
  • the present invention aims to solve this problem and provides a tube as described in the first paragraph of this specification.
  • the solution according to the invention consists in reinforcing the thickness of the tube not over the entire periphery and the entire length of the tubular element, but only in the most stressed places.
  • the present tube has at the collar and more particularly in the portions of walls oriented in the direction of movement of the tube, in order to reduce the risks of tube rupture, at the collar, an excess thickness of ceramic material by compared to the thickness of material at another cross section of the tubular element.
  • the collar is conical and of oblong cross section.
  • the collar is flush with the front and rear edges of the upper face, while it is set back from the lateral edges of said upper face. Therefore, the side flanges are free and can bear on the mechanical tube changing device.
  • the oblong shape of the collar in the direction of movement contributes to reinforcing its mechanical resistance to the thrust exerted by the rod when changing the pouring tube.
  • the oblong section serves to increase the moment of inertia and thereby reduce the risk of rupture.
  • the tubular element comprises, integral with it, an anchoring flange intended to fix an added plate, made of a refractory material different from the tubular element and subjected to a rectification in order to be better adapted to slide against the plate reference
  • the reinforcing collar is integral with said anchoring flange.
  • the collar is integral with them.
  • a pouring tube 1 is formed of a tubular element 2 having an internal central channel 3 of constant section and of an attached plate 4 of rectangular section.
  • the tubular element 2 is generally made of a refractory material resistant to erosion.
  • the body of the tubular element 2 may include an insert 5 of zirconium oxide intended to protect at least part of the external wall of the tube from the combined erosive action of steel and air at the location of the steel level in the mold.
  • the lower end of the tubular element 2 has lateral orifices 6, 7 which open in the direction of movement of the tube in a diametrically opposite manner. These orifices are intended to deflect the pouring jet and attenuate the erosive action of the eddies. (Fig. 1)
  • the upper end of the tubular element 2 carries a perfectly flat upper face forming an integral part of the tubular element 2.
  • the edge of the upper face and its junction with the upper end of the tubular element 2 of the tube are reinforced. by a collar 9 having on the side portions of walls directed in the direction of movement of the tube 1, an excess thickness of ceramic material, so as to have an oblong section. (Fig. 4)
  • the upper end of the tubular element has the same composition as the tubular element 2 and forms therewith the same single piece or entity. It can have either a simple interlocking surface (Fig. 1 and 3) or a flat surface (Fig. 5 and 6).
  • the first form is suitable for receiving an added plate 4.
  • the upper face of the plate is strictly flat to ensure the tightness of the tube 1 against the sliding plane of the plate. reference not shown, so as to avoid any aspiration of ambient atmospheric air. This makes it possible to prevent the formation of various oxides and bubbles in the mass of metal, considerably reducing the quality of the final product.
  • the present invention proposes to reinforce the thickness of the pouring tube only in the most stressed places, in the front and rear wall portions of the collar 9.
  • the collar 9 is preferably conical and has an oblong section.
  • the collar 9 and at least the upper part of the tubular element 2 are optionally covered by a metal protective casing 10.
  • This metal casing 10 follows the shape of the collar 9. It advantageously covers the relatively hard free lateral edges of the upper part of the tube. These lateral flanges serve as a sliding shoe for the pouring tube in the feeding and tube changing device. Without the presence of the envelope, the side edges, due to the hardness of the ceramic material, would scratch the guide rails and cause early wear.
  • the method of assembling the added plate 4 on the fixing flange 8 does not involve any anchoring part.
  • the fixing flange 8 and the added plate 4 are simply enclosed in a protective metal housing 11.
  • the collar 9 preferably has a conical shape. As illustrated in Figures 1 and 6, the collar 9 is flush with the front and rear edges of the upper face diametrically opposed by relative to the direction of movement of the pouring tube, when changing the tube.
  • the lateral edges of the added plate are not affected by these extra thicknesses and can bear on the feeding and tube changing device, in particular on guide rails arranged in the vicinity of a pouring tube and intended to bring a tube from a vertical standby position next to a tube in the casting position, towards said casting position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Endoscopes (AREA)

Claims (4)

  1. Gießrohr, umfassend ein rohrförmiges Element (2), welches an einem oberen Ende eine obere, völlig ebene Fläche aufweist, welche dazu bestimmt ist, in einer Vorrichtung zur Zufuhr und zum Wechsel eines Rohres oder einer Reguliervorrichtung entlang der festen Innenfläche einer feuerfesten Bezugsplatte oder der mobilen einer Schieberplatte zu gleiten, wobei die Vorrichtung an dem oberen Ende des Rohrs (1) durch einen Kragen (9) und einen metallischen Schutzmantel (10) verstärkt wird, dadurch gekennzeichnet, daß das Rohr auf der Höhe des Kragens eine Überdicke keramischen Materials in Bezug auf die Materialdicke in der Umgebung eines anderen transversalen Abschnitt des Rohrelements aufweist, und daß der Rohrkragen gleichzeitig eine konische Form und einen länglichen transversalen Abschnitt aufweist.
  2. Gießrohr nach Anspruch 1, dadurch gekennzeichnet, daß das Gießrohr auf dem Niveau des Kragens (9) in den Wandteilen, die in Richtung der Rohrverschiebung orientiert sind, eine Überdicke an keramischem Material in Bezug auf die Dicke des Materials auf der Höhe eines seitlichen Wandteils des Rohrelements aufweist.
  3. Gießrohr nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kragen (9) die Flansche vor und nach der oberen Fläche ausgleicht und daß er eine Schwund der Seitenflansche der Bezugsplatte aufweist, die bestimmt sind zur Abstützung auf der Zufuhr- und Rohrwechselvorrichtung.
  4. Gießrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Kragen (9) auf der Seite der einander diametral gegenüberliegenden Wandteile in Richtung der Rohrverschiebung Überdicken aufweist, die die Befestigung eines rohrförmigen Elements (2) an einem Befestigungsflansch (8) in feuerfestem Material verstärken.
EP94903708A 1993-02-10 1994-01-14 Giessrohr Expired - Lifetime EP0683706B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9300123 1993-02-10
BE9300123A BE1006726A3 (fr) 1993-02-10 1993-02-10 Tube de coulee.
PCT/BE1994/000004 WO1994017937A1 (fr) 1993-02-10 1994-01-14 Tube de coulee

Publications (2)

Publication Number Publication Date
EP0683706A1 EP0683706A1 (de) 1995-11-29
EP0683706B1 true EP0683706B1 (de) 1997-02-19

Family

ID=3886839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94903708A Expired - Lifetime EP0683706B1 (de) 1993-02-10 1994-01-14 Giessrohr

Country Status (9)

Country Link
EP (1) EP0683706B1 (de)
AT (1) ATE149006T1 (de)
AU (1) AU5806594A (de)
BE (1) BE1006726A3 (de)
DE (1) DE69401773T2 (de)
ES (1) ES2098914T3 (de)
MX (1) MX9401023A (de)
WO (1) WO1994017937A1 (de)
ZA (1) ZA94884B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016941A (en) * 1998-04-14 2000-01-25 Ltv Steel Company, Inc. Submerged entry nozzle
US20140326761A1 (en) * 2012-09-11 2014-11-06 Refractory Intellectual Property Gmbh & Co. Kg Refractory pouring device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1447139A (fr) * 1964-02-03 1966-07-29 Hagenburger Chamotte Ton Procédé et dispositif pour la coulée directe de métaux et leurs diverses applications
ATA415774A (de) * 1973-08-24 1976-04-15 Kloeckner Werke Ag Giessrohr fur stranggiessanlagen
BE1000948A3 (fr) * 1987-10-02 1989-05-23 Internat Ind Engineering Sprl Tube de coulee pour dispositif de fermeture coulissante.

Also Published As

Publication number Publication date
WO1994017937A1 (fr) 1994-08-18
DE69401773T2 (de) 1997-07-10
DE69401773D1 (de) 1997-03-27
ES2098914T3 (es) 1997-05-01
EP0683706A1 (de) 1995-11-29
BE1006726A3 (fr) 1994-11-29
ZA94884B (en) 1994-08-23
MX9401023A (es) 1994-08-31
AU5806594A (en) 1994-08-29
ATE149006T1 (de) 1997-03-15

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