EP0442515B1 - Vorrichtung zum Austausch eines Tauchrohres zwischen zwei metallurgischen Gefässen einer Stranggussanlage - Google Patents

Vorrichtung zum Austausch eines Tauchrohres zwischen zwei metallurgischen Gefässen einer Stranggussanlage Download PDF

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Publication number
EP0442515B1
EP0442515B1 EP91102134A EP91102134A EP0442515B1 EP 0442515 B1 EP0442515 B1 EP 0442515B1 EP 91102134 A EP91102134 A EP 91102134A EP 91102134 A EP91102134 A EP 91102134A EP 0442515 B1 EP0442515 B1 EP 0442515B1
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EP
European Patent Office
Prior art keywords
submerged
submerged nozzle
outlet
operating position
nozzles
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
EP91102134A
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German (de)
English (en)
French (fr)
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EP0442515A1 (de
Inventor
Romano Dr.-Ing. Cappelli
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Individual
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Individual
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Publication date
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Priority to AT9191102134T priority Critical patent/ATE105522T1/de
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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
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the invention relates to a device for exchanging an immersion tube between two metallurgical vessels of a continuous casting installation according to the preamble of claim 1.
  • a device for exchanging an immersion tube between two metallurgical vessels of a continuous casting installation according to the preamble of claim 1.
  • Such a device is known from US-A-3 743 007.
  • the dip tubes are guided along an arcuate chain drive to the position under the spout. It is therefore necessary to pivot along the chain drive and to align the dip tubes vertically to the spout. This also applies insofar as US-A-3 743 007 proposes an arcuate guideway for the dip tubes.
  • the invention relates to a device for exchanging a dip tube between a tundish and a mold, or to an exchange device for dip tubes in thin slab casting.
  • the dip tube Especially in thin slab casting, it is necessary for the dip tube to be changed as quickly as possible.
  • the dip tubes required for this distribute the steel flow, for example, over a width of 340 mm with slab thicknesses of approx. 36 mm.
  • the wall thickness of such immersion tubes is extremely thin and does not go through the desired sequence. This requires changing the dip tube during the sequence. Because a slab length of 2 m would be achieved for the aforementioned example with a change duration of, for example, 8 seconds, for which the entire casting device is not designed, an attempt must be made to shorten the dip tube change to shorter times.
  • Valves for regulating the steel supply from the distributor (tundish) into the mold are both spouts that are controlled by plugs and slide closures of various designs.
  • the invention is based on the object of offering a generic device for exchanging an immersion tube between two metallurgical vessels of a continuous casting installation, which enables an immersion tube exchange to be carried out as quickly as possible, with the immersion tube exchange being carried out largely automatically.
  • the invention is characterized by the features of the characterizing part of claim 1.
  • a device which simultaneously receives two dip tubes spaced apart from one another on a support device, the support device being pivotable, so that the dip tube which is in the operating position is pivoted away from the operating position and, at the same time, the previously in a dip tube located in a waiting position is pivoted into the operating position. It is obvious that such a dip tube change can be accomplished in a very short time with a corresponding rotatable support device and enables the sequence to be continued safely.
  • the support device is attached to the first metallurgical vessel (for example the tundish).
  • support plates can be fastened to the bottom of the first vessel, each of which has a bearing at its free end, in which a shaft is guided in each case, the mutually directed free sections of the shafts being fastened to the support device.
  • At least one of the shafts can be rotated alternately via a drive member in order to simultaneously pivot the support device or the immersion tubes attached to the support device.
  • the drivable shaft has at its free outer end a toothed ring which is connected to a toothed rack which can be acted upon by a piston-cylinder unit. Depending on the direction of movement of the rack, a torque is transmitted to the shaft and thus the shaft and ultimately the support device are rotated in one direction or the other.
  • attachment of the support device or the formation of the drive member can also be carried out in another way, as will be explained below.
  • the support device is arranged in such a way that the associated immersion tubes in the operating position project centrally into the second metallurgical vessel (the mold) with its lower free end.
  • the central longitudinal axis of the immersion tube in the operating position extends the central longitudinal axis of the associated spout. This ensures a continuous supply of the molten metal from the tundish into the mold.
  • the immersion tubes are positioned at an angle of approximately 90 degrees to one another, this has the advantage that the immersion tube which is transported from the operating position into the removal position runs approximately horizontally in the removal position, so that it can be easily removed from it exchange for a new dip tube.
  • the support device is rotated in the opposite direction as before, so that the newly installed dip tube is moved to the operating position and the used dip tube in turn reaches the position in which the fresh dip tube was originally when the first dip tube was changed.
  • This arrangement enables easy access and a safe dip tube change in seconds. Tests have shown that the dip tube change can be shortened to one to two seconds with the device described.
  • the main advantages of the device are therefore the speed of the exchange, with the result that only a very short interruption in the supply of the molten metal is required.
  • the flow of the molten metal can be briefly interrupted by the control valve described above. In this way there is practically no loss of time and material.
  • the automated exchange of the immersion tubes makes manual work with the corresponding dangers for the operating personnel unnecessary. Removing the used dip tube and replacing it with a new dip tube can also be done mechanically with appropriate positioning devices.
  • FIG. 1 the lower part of a tundish 1 is shown with a spout 2.
  • support plates 4 protrude downward on both sides of the spout 2, each serving to rotatably receive a shaft 5 in an associated bearing 6 (FIG. 2).
  • the two shafts 5 run coaxially to one another and perpendicular to side walls 7 of a rotatable support device 8, the shafts 5 being fastened to the side walls 7.
  • the side walls 7 are connected to one another via transverse walls 23.
  • the support device 8 is designed with clamping devices 9 for holding two immersion tubes 10A, 10W.
  • the tensioning devices 9 on the support device 8 have a two-part outer sleeve 9E which can be moved away from one another so that the upper part of the respective dip tube 10A, 10W, on which an outer sleeve 9I is fastened, can be passed.
  • the elements 9E of the outer sleeve are moved towards one another again, that is to say they are tensioned, they come into contact with the respective inner sleeve 9I and position the dip tube in the correct position, as will be explained in more detail below.
  • the two dip tubes are arranged at an angle of 90 degrees to one another with their respective central longitudinal axis (II-II) and can be rotated about a common center of rotation C.
  • Figure 2 in turn shows that one of the shafts has at its free end a ring gear 11 which cooperates with a rack 12, at the free end of which a hydraulically operating piston-cylinder unit 14, 13 is arranged, which in turn via an anchor 15 on Bottom 3 of the tundish is attached.
  • the piston-cylinder unit 14, 13 is acted upon by a pressure fluid, which is supplied by a pressure fluid source, not shown.
  • the movement of the rack 12 in one direction or the other causes the support device 8 to rotate in one direction or the other about the axis V-V (FIG. 2) predetermined by the shafts 5, the shafts 5 in corresponding bearings 6 of the support plates 4 be performed.
  • the center longitudinal axis of the dip tube 10A in the operating position 10W is indicated by III - III.
  • the procedure is exactly the opposite, that is, after the used dip tube 10R has been exchanged for a new dip tube 10A, it is transferred from the waiting position to the operating position 10W according to arrow F2, and the used dip tube 10W is simultaneously pivoted into the position, that in Figure 1 Has dip tube 10A.
  • two opposite metal elements in the form of a spherical cap 22 are fastened to the lower end of the spout 2. Furthermore, the lower end of the spout 2 is formed with a corresponding annular surface, which in turn is formed corresponding to the corresponding upper free ends of the immersion tubes 10A, 10W.
  • the annular surface of the lower end of the spout 2 (the sleeve 2) and the corresponding annular surface The upper end of the immersion tubes 10W, 10A thus lie on a ball which has the same diameter as that on which the said spherical cover 22 is located.
  • This design is intended to ensure that the dip tubes maintain a correct position during the dip tube change and are securely positioned in the operating position with their upper end relative to the lower end of the spout 2, without the aid of a counterweight device 16, 17, 18, 19, 20 , 21, which can be seen in detail from Figure 3.
  • FIG. 3 also shows a further embodiment of the device.
  • the lower part of a tundish 1 with spout 2 can again be seen.
  • the rotating device with the rack 12 and the piston-cylinder unit 13, 14 can be seen.
  • the immersion tube 10A originally in the waiting position is in the operating position 10W below the spout 2, but at a distance from the lower end of the spout 2
  • the immersion tube is held over the tensioning device 9 or the sleeve 9I.
  • the dip tube is simultaneously inserted into a sleeve 16 with two semicircular, opening arms, which are connected at 17 to a hinge 18, from which a rod 19 extends, which is pivotably guided at 20 and a counterweight at its lower free end 21 carries.
  • the counterweight 21 serves to lift the dip tube 10W upwards and allows the dip tube to slide into the outer sleeve 9E until the upper end of the dip tube 10W bears against the lower free end of the spout 2.
  • the reverse procedure is used.
  • the cuff 16 is opened before the further rotation of the support device 8 so that the dip tube can slide vertically in order to detach from the spout 2.
  • the parts 18 to 21 i.e. the lifting / lowering device
  • FIG. 4 shows a support device in the form of a robot 30.
  • the robot 30 is arranged in the immediate vicinity of the spout 2 of the tundish 1. It comprises a control unit 31 of a system of controlled and programmed telescopic rods 32, 33, 34, 35, 36 in order to close the immersion tube 10W in the operating position under the spout 2 hold or the plunger 10A in the upper waiting position.
  • the free end of the telescopic rod 36 has a gripper 37, which serves to receive the dip tube 10W.
  • the free end of the telescopic rod 34 is also formed with a corresponding gripper 38, which is used analogously for receiving the dip tube 10A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP91102134A 1990-02-15 1991-02-15 Vorrichtung zum Austausch eines Tauchrohres zwischen zwei metallurgischen Gefässen einer Stranggussanlage Expired - Lifetime EP0442515B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191102134T ATE105522T1 (de) 1990-02-15 1991-02-15 Vorrichtung zum austausch eines tauchrohres zwischen zwei metallurgischen gefaessen einer stranggussanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19375A IT1238623B (it) 1990-02-15 1990-02-15 Dispositivo per sostituire un condotto di protezione della colata continua di acciaio da un primo contenitore in un secondo contenitore
IT1937590 1990-02-15

Publications (2)

Publication Number Publication Date
EP0442515A1 EP0442515A1 (de) 1991-08-21
EP0442515B1 true EP0442515B1 (de) 1994-05-11

Family

ID=11157164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102134A Expired - Lifetime EP0442515B1 (de) 1990-02-15 1991-02-15 Vorrichtung zum Austausch eines Tauchrohres zwischen zwei metallurgischen Gefässen einer Stranggussanlage

Country Status (4)

Country Link
EP (1) EP0442515B1 (it)
AT (1) ATE105522T1 (it)
DE (1) DE59101591D1 (it)
IT (1) IT1238623B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0577909A1 (en) * 1992-07-10 1994-01-12 FLOCON ITALIANA S.r.l. Replaceable auxiliary nozzle
BE1007317A3 (fr) * 1993-07-27 1995-05-16 Int Ind Eng Sa Dispositif d'amenee et d'echange d'un tube de coulee dans une installation de coulee continue a brames minces.
FR2733705B1 (fr) * 1995-05-05 1997-06-13 Vesuvius France Sa Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie
FR2745211B1 (fr) * 1996-02-22 1998-04-30 Vesuvius France Sa Repartiteur equipe d'un changeur de tube et plaque pour le changeur de tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743007A (en) * 1970-10-21 1973-07-03 Schloemann Ag Continuous casting apparatus with inter-changeable pouring tubes
FR2530167A1 (fr) * 1982-07-13 1984-01-20 Air Liquide Procede et installation de protection d'un jet de coulee de metal liquide
US4854488A (en) * 1988-03-08 1989-08-08 National Steel Corporation Shroud tube support and changing device

Also Published As

Publication number Publication date
EP0442515A1 (de) 1991-08-21
IT9019375A0 (it) 1990-02-15
IT9019375A1 (it) 1991-08-16
DE59101591D1 (de) 1994-06-16
IT1238623B (it) 1993-08-18
ATE105522T1 (de) 1994-05-15

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