EP0392168B1 - Shut-off and/or control element for a metallurgical vessel - Google Patents

Shut-off and/or control element for a metallurgical vessel Download PDF

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Publication number
EP0392168B1
EP0392168B1 EP90103288A EP90103288A EP0392168B1 EP 0392168 B1 EP0392168 B1 EP 0392168B1 EP 90103288 A EP90103288 A EP 90103288A EP 90103288 A EP90103288 A EP 90103288A EP 0392168 B1 EP0392168 B1 EP 0392168B1
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EP
European Patent Office
Prior art keywords
outer tube
opening
zone
control element
closure
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
EP90103288A
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German (de)
French (fr)
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EP0392168A1 (en
Inventor
Raimund Brückner
José GIMPERA
Rolf WALTENSPÜHL
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Didier Werke AG
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Didier Werke AG
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Publication date
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Priority to AT90103288T priority Critical patent/ATE83414T1/en
Publication of EP0392168A1 publication Critical patent/EP0392168A1/en
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material

Definitions

  • the invention relates to a closing and / or regulating member for tapping molten metal from a metallurgical vessel with a stationary inner tube that has at least one opening, and with an outer tube that has an end edge that runs around the circumference of the inner tube and that is relative to the inner tube from a closed position in which the opening is covered by the outer tube, can be rotated into such an open position about the longitudinal axis of the tubes and / or can be displaced in the longitudinal axis direction, in which molten metal enters the inner tube through the opening.
  • Openings are also provided there on the outer tube. In order to allow melt to flow out of the vessel, the openings in the outer tube are brought into alignment with the openings in the inner tube.
  • the outer tube When the vessel is filled with the melt, the outer tube is in the closed position.
  • the temperature of the inner tube and the outer tube, even if the two tubes are preheated, may initially be lower than the temperature of the melt flowing into the vessel.
  • the melt can freeze in the openings in the outer tube and form plugs which are stuck in the openings in the outer tube.
  • These plugs are enclosed on the one hand by the extent of the openings in the comparatively cold and poorly heat-conducting outer tube and, on the other hand, delimited by the inner tube, which is also comparatively cold and poorly heat-conducting.
  • the plugs are only in contact with the hot melt on one surface. It has been observed in experiments that these plugs do not dissolve for a long time.
  • the object of the invention is to design the outer tube so that no melt plugs can form in openings.
  • the above object is achieved in a closing and / or regulating element of the type mentioned at the outset in that the end edge forms the following three zones: a first zone which passes over the opening when the outer tube is rotated about the longitudinal axis, and a second zone which seen in the longitudinal axis direction in the open position of the outer tube on one side of the opening, and a third zone which is seen in the longitudinal axis direction in the closed position of the outer tube on the other side of the opening.
  • the outer tube has no opening in this design.
  • the front edge of the outer tube alone opens and closes the opening or the openings of the inner tube.
  • the melt cannot freeze on the outer tube when it is poured into the vessel.
  • the melt does not freeze in the area of the front edge, since there it is largely in contact with the bulk of the melt in the vessel. Otherwise, could grafting of the melt does not adhere to the outer tube, since the front edge would adjoin such grafting only on one side and would not in any case wedge it in.
  • the movement of the outer tube also counteracts the build-up of frozen melt plugs.
  • Another advantage of the invention is that the outer tube is not weakened by openings.
  • the outer tube only has to be rotated about the common axis of rotation of the tubes to open and close the opening or the openings of the inner tube. It has been shown that this rotary movement is smooth and the outer surface of the inner tube and the inner surface of the outer tube form guide surfaces for one another and sealing surfaces which are sealed against melt passage.
  • the melt entering the inner tube can be throttled in a desired manner depending on the rotational position of the outer tube.
  • a closing and control element 1 consists of an inner tube 2 and an outer tube 3. Both are made of ceramic, refractory material.
  • the inner pipe 2 is mortared airtight and meltproof in a refractory lining 4 of an intermediate vessel 5 and opens into a free-running nozzle 6 through which metal melt flows out of the interior of the intermediate vessel 5 when the closing and / or regulating member 1 is open.
  • the inner tube 2 can also be extended as an immersion nozzle.
  • the outer tube 3 is non-rotatably connected by bolts 7 to a holder 8, which in turn is connected to a drive arm 10 via a cardan link 9.
  • This is supported on a bearing block 11 of the intermediate vessel 5 and has a lever arm 12 at its outer end, with the aid of which a torque can be exerted on the holder 8 and thus on the outer tube 3 via the drive arm 10 and the cardan joint 9.
  • the outer tube 3 can be rotated in both directions about the common longitudinal axis 13 with respect to the inner tube 2.
  • the outer tube 3 is also displaceable in the direction of its longitudinal axis.
  • the outer tube 3 can only be moved in the direction of its longitudinal axis 13.
  • the inner tube 2 is provided with at least one opening 14.
  • the outer tube 3 has an end edge 15 at its end facing away from the holder 8. It is not provided with an opening corresponding to the opening 14.
  • the inner tube 2 and the outer tube 3 form on their outer circumference in an axial region 16 sealing surfaces 17 and 18, which are fitted into one another in a melt-tight manner. There is an annular gap 19 between the sealing surfaces 17, 18.
  • the inner tube 2 is provided with only one opening 14.
  • the end edge 15 has one or two first zones 20, one of which is shown in broken lines in FIG. 2, a second zone 21 and a third zone 22.
  • the first zones 20 run obliquely between the second zone 21 and the third zone 22.
  • the zones mentioned lie on a plane oblique to the longitudinal axis 13.
  • the first zone 20 shown in broken lines or the first zone lying above the sectional plane of FIG. 2 passes over the opening 14.
  • the opening 14 is covered more or less gradually by the outer tube 3 depending on the speed of rotation and the slope of the first zone.
  • the first two zones 20 do not need to have the same and also no linear oblique course. They can be designed in such a way that the opening 14 is covered more quickly at the same angles of rotation in one direction than at the same angles of rotation in the other direction of rotation.
  • the outer tube 3 When filling the melt into the empty intermediate vessel 5, the outer tube 3 is brought into its closed position.
  • the inner tube 2 and the outer tube 3 are colder than the filled melt.
  • the end edge 15 with its zones 20, 21, 22 is open to the melt and does not include any melt regions that could otherwise freeze into grafts on the outer tube 3.
  • Current, regional partial freezes dissolve under the action of the contacting melt, which is supported by the pushing movement of the first zone 20 when the outer tube 3 is rotated.
  • the outer tube 3 can thus, when the desired level of the melt in the intermediate vessel 5 is reached, be brought into its open position immediately, the outflow of the melt through the opening 14 not being hindered by frozen regions.
  • the end edge 15 itself runs radially to the longitudinal axis 13 in its individual zone 20, 21, 22.
  • the end edge 15 in such a way that it is in one, several or all zones 20, 21, 22 lies at an angle W1 or W2 obliquely to the longitudinal axis 13.
  • the angles W1 and W2 in zones 20, 21 can influence the inflow conditions of the melt into the opening 14.
  • the angle W2 of the third zone 22 ensures that the melt does not enter an acute-angled or right-angled, but rather an obtuse-angled region when it is filled into the vessel, which further reduces the risk of freezing.
  • the inner tube 2 has two diametrically opposite openings 14. Accordingly, the first, second and third zones 20, 21, 22 are provided in pairs on the front edge 15. In Figures 4 and 5 possible courses of the end edge 15 are shown unwound. In Figure 3 and corresponding to Figures 4 and 5, the opening position of the outer tube 3 is shown. Zone 21 lies above openings 14 so that they are open.
  • zones 20 each run at an obtuse angle to zone 21, from which they merge into zone 22. They each have the same obtuse angle to zone 21 or 22. It is thereby achieved that when the outer tube 3 is rotated, the two openings 14 are closed at the same speed, regardless of whether the outer tube 3 is rotated in the direction of arrow r or in the direction of arrow l (see FIG. 4) with respect to the inner tube 2 . If the outer tube 3 is rotated by 90 ° with respect to the closed position, then both openings 14 are closed, the zones 22 then being below the openings 14.
  • a forward run of the closing of one opening 14 with respect to the other opening 14 could be achieved in that the openings 14 or the zones 21 are offset from one another at the circumference, deviating from 180 °.
  • the same design of the zones 20 in both directions of rotation l, r has the advantage that if, after prolonged operation of the outer tube 3 in one direction of rotation, the zones 20 to the left of the openings 14 should be worn, the operation takes place in the other direction of rotation can, so that the zones 20 to the right of the opening 14 are worn out can be changed without changing the outflow behavior, based on the respective angle of rotation of the outer tube 3.
  • the first zones 20, which in the open position are on both sides of each of the two openings 14, run at different angles. It is thereby achieved that when the outer tube 3 is rotated in the direction of the arrow 1, the openings 14 are closed more quickly than when the outer tube 3 is rotated in the direction of the arrow r.
  • the outer tube 3 can be displaced by a stroke H parallel to the longitudinal axis 13.
  • This stroke H is dimensioned such that the outer tube 3, when it is in its open position, that is to say the second zones 21 lie above the openings 14, can be depressed so far in the direction of the arrow N that the second zones 21 of the end edge 15 then stand below the openings 14. This is favorable for malfunctions in which the outer tube 3 can no longer be rotated about the longitudinal axis 13.
  • the openings 14 can be closed in this case.
  • an inner surface 23 of the outer tube 3 closes the inner tube 2, which is open at the top.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Pipe Accessories (AREA)
  • Forging (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Packages (AREA)

Abstract

A shut-off and/or control element for tapping liquid metal melt from a metallurgical vessel has an inner tube (2) secured on the vessel (5) and having at least one opening (14). A front edge (15) of a movable outer tube (3) encircles the inner tube (2). The outer tube (3) can be moved out of a closed position into an open position of the opening (14). In order to avoid the possibility of plugs of metal melt forming in openings (14) of the outer tube (3), the relative position of the opening (14) of the inner tube (2) and of the front edge (15) of the outer tube (3) is configured in such a way that, during the movement of the outer tube (3), the front edge (15) moves beyond the opening (14). Viewed in the direction (13) of the longitudinal axis, the front edge (15) is situated on one side of the opening (14) in the open position and on the opposite side of the opening (14) in the closed position.

Description

Die Erfindung betrifft ein Schließ- und/oder Regelorgan für den Abstich flüssiger Metallschmelze aus einem metallurgischen Gefäß mit einem ortsfesten Innenrohr, das wenigstens eine Durchbrechung aufweist, und mit einem Außenrohr, das eine um den Umfang des Innenrohrs umlaufende Stirnkante aufweist und das relativ zum Innenrohr von einer Schließstellung, in der die Durchbrechung vom Außenrohr abgedeckt ist, in eine solche Öffnungsstellung um die Längsachse der Rohre drehbar und/oder in Längsachsrichtung verschiebbar ist, in der Metallschmelze durch die Durchbrechung in das Innenrohr eintritt.The invention relates to a closing and / or regulating member for tapping molten metal from a metallurgical vessel with a stationary inner tube that has at least one opening, and with an outer tube that has an end edge that runs around the circumference of the inner tube and that is relative to the inner tube from a closed position in which the opening is covered by the outer tube, can be rotated into such an open position about the longitudinal axis of the tubes and / or can be displaced in the longitudinal axis direction, in which molten metal enters the inner tube through the opening.

Ein derartiges Schließ- und/oder Regelorgan ist in der DE-PS 35 40 202 beschrieben. Dort sind auch am Außenrohr Durchbrechungen vorgesehen. Um schmelze aus dem Gefäß ausfließen zu lassen, werden die Durchbrechungen des Außenrohrs mit den Durchbrechungen des Innenrohrs zum Fluchten gebracht.Such a locking and / or regulating element is described in DE-PS 35 40 202. Openings are also provided there on the outer tube. In order to allow melt to flow out of the vessel, the openings in the outer tube are brought into alignment with the openings in the inner tube.

Wenn das Gefäß mit der Schmelze gefüllt wird, dann steht das Außenrohr in der Schließstellung. Die Temperatur des Innenrohrs und des Außenrohrs kann, selbst wenn die beiden Rohre vorerwärmt sind, anfangs noch kleiner als die Temperatur der in das Gefäß einströmenden Schmelze sein. Versuche haben gezeigt, daß die Schmelze in den Durchbrechungen des Außenrohrs einfrieren und Pfropfen bilden kann, die in den Durchbrechungen des Außenrohrs festsitzen. Diese Pfropfen sind einerseits vom Umfang der Durchbrechungen des vergleichsweise kalten und schlecht wärmeleitenden Außenrohrs eingeschlossen und andererseits von dem Innenrohr begrenzt, das ebenfalls vergleichsweise kalt und schlecht wärmeleitend ist. Die Pfropfen stehen nur an einer Oberfläche mit der heißen Schmelze in Berührung. Es wurde bei Versuchen beobachtet, daß diese Pfropfen sich erst nach längerer Zeit auflösen. Solange die Pfropfen bestehen, ist es nicht möglich, einen Abstich vorzunehmen. Die Pfropfen in den Durchbrechungen des Außenrohrs verlassen selbst bei einer Bewegung des Außenrohrs dessen Durchbrechungen nicht, da sie von dem um sie umlaufenden Rändern der Durchbrechungen umschlossen sind. Die Pfropfen machen die Bewegung des Außenrohrs mit.When the vessel is filled with the melt, the outer tube is in the closed position. The temperature of the inner tube and the outer tube, even if the two tubes are preheated, may initially be lower than the temperature of the melt flowing into the vessel. Experiments have shown that the melt can freeze in the openings in the outer tube and form plugs which are stuck in the openings in the outer tube. These plugs are enclosed on the one hand by the extent of the openings in the comparatively cold and poorly heat-conducting outer tube and, on the other hand, delimited by the inner tube, which is also comparatively cold and poorly heat-conducting. The plugs are only in contact with the hot melt on one surface. It has been observed in experiments that these plugs do not dissolve for a long time. As long as the stoppers are in place, it is not possible to take a tap. The plugs in the openings of the outer tube do not leave their openings even when the outer tube moves, since they are enclosed by the edges of the openings surrounding them. The stoppers follow the movement of the outer tube.

In der DE-OS 37 31 600 ist ein ähnliches Schließ- und/oder Regelorgan beschrieben. Dort sitzt das Außenrohr am Gefäß fest und das Innenrohr ist beweglich. In den Durchbrechungen des Außenrohrs können sich in der beschriebenen Weise Pfropfen bilden. Dieser Stand der Technik trägt somit nicht zur Lösung des bestehenden Problems bei.In DE-OS 37 31 600 a similar locking and / or regulating device is described. There the outer tube is firmly attached to the vessel and the inner tube is movable. Plugs can form in the openings in the outer tube in the manner described. This prior art therefore does not help to solve the existing problem.

Aufgabe der Erfindung ist es, das Außenrohr so zu gestalten, daß sich keine Schmelzenpfropfen in Durchbrechungen bilden können.The object of the invention is to design the outer tube so that no melt plugs can form in openings.

Erfindungsgemäß ist obige Aufgabe bei einem Schließ-und/oder Regelorgan der eingangs genannten Art dadurch gelöst, daß die Stirnkante folgende drei Zonen bildet: eine erste Zone, die beim Drehen des Außenrohrs um die Längsachse über die Durchbrechung hinweggeht, und eine zweite Zone, die in Längsachsrichtung gesehen in der Öffnungsstellung des Außenrohrs an der einen Seite der Durchbrechung steht, sowie eine dritte Zone, die in Längsachsrichtung gesehen in der Schließstellung des Außenrohrs an der anderen Seite der Durchbrechung steht.According to the invention, the above object is achieved in a closing and / or regulating element of the type mentioned at the outset in that the end edge forms the following three zones: a first zone which passes over the opening when the outer tube is rotated about the longitudinal axis, and a second zone which seen in the longitudinal axis direction in the open position of the outer tube on one side of the opening, and a third zone which is seen in the longitudinal axis direction in the closed position of the outer tube on the other side of the opening.

Das Außenrohr weist bei dieser Gestaltung keine Durchbrechung auf. Allein die Stirnkante des Außenrohrs bewirkt das Öffnen und Schließen der Durchbrechung bzw. der Durchbrechungen des Innenrohrs.The outer tube has no opening in this design. The front edge of the outer tube alone opens and closes the opening or the openings of the inner tube.

Weil das Außenrohr keine Durchbrechungen aufweist, kann die Schmelze beim Eingießen in das Gefäß nicht an dem Außenrohr einfrieren. Im Bereich der Stirnkante friert die Schmelze nicht ein, da sie dort weitestgehend in Kontakt mit der Hauptmenge der Schmelze im Gefäß steht. Im übrigen könnten sich Pfropfen der Schmelze an dem Außenrohr nicht festsetzen, da die Stirnkante nur einseitig an solche Pfropfen angrenzen würde und diese jedenfalls nicht einschlißen würde. Die Bewegung des Außenrohrs wirkt darüberhinaus einem Ansetzen von eingefrorenen Schmelzepfropfen entgegen.Because the outer tube has no openings, the melt cannot freeze on the outer tube when it is poured into the vessel. The melt does not freeze in the area of the front edge, since there it is largely in contact with the bulk of the melt in the vessel. Otherwise, could grafting of the melt does not adhere to the outer tube, since the front edge would adjoin such grafting only on one side and would not in any case wedge it in. The movement of the outer tube also counteracts the build-up of frozen melt plugs.

Ein weiterer Vorteil der Erfindung besteht darin, daß das Außenrohr nicht durch Durchbrechungen geschwächt ist.Another advantage of the invention is that the outer tube is not weakened by openings.

Durch die Gestaltung der Stirnkante lassen sich verschiedene Kennlinien für die in die Durchbrechung des Innenrohrs eintretende Schmelzenmenge in Abhängigkeit von der Verstellung des Außenrohrs verwirklichen.By designing the front edge, different characteristics can be realized for the amount of melt entering the opening in the inner tube, depending on the adjustment of the outer tube.

Günstig ist hierbei, daß das Außenrohr zum Öffnen und Schließen der Durchbrechung bzw. der Durchbrechungen des Innenrohrs lediglich um die gemeinsame Drehachse der Rohre gedreht werden muß. Es hat sich gezeigt, daß diese Drehbewegung leichtgängig ist und dabei die Außenfläche des Innenrohrs und die Innenfläche des Außenrohrs Führungsflächen füreinander und gegen Schmelzendurchtritt dichte Dichtflächen bilden.It is advantageous here that the outer tube only has to be rotated about the common axis of rotation of the tubes to open and close the opening or the openings of the inner tube. It has been shown that this rotary movement is smooth and the outer surface of the inner tube and the inner surface of the outer tube form guide surfaces for one another and sealing surfaces which are sealed against melt passage.

Durch eine entsprechende Formgebung der ersten Zone läßt sich die in das Innenrohr eintretende Schmelze in Abhängigkeit von der Drehstellung des Außenrohrs in einer gewünschten Weise drosseln.By appropriately shaping the first zone, the melt entering the inner tube can be throttled in a desired manner depending on the rotational position of the outer tube.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung von Ausführungsbeispielen. In der Zeichnung zeigen:

  • Figur 1 ein Schließ- und/oder Regelorgan in einem Zwischengefäß (Tundish),
  • Figur 2 die Einzelheit I nach Figur 1, vergrößert in einem ersten Ausführungsbeispiel,
  • Figur 3 ein weiteres Ausführungsbeispiel in der Darstellung entsprechend Figur 2,
  • Figur 4 eine Abwicklung der Stirnkante des Außenrohrs nach Figur 3, und
  • Figur 5 eine Alternative zu Figur 4.
Advantageous developments of the invention result from the subclaims and the following description of exemplary embodiments. The drawing shows:
  • 1 shows a closing and / or regulating element in an intermediate vessel (tundish),
  • FIG. 2 shows detail I according to FIG. 1, enlarged in a first exemplary embodiment,
  • FIG. 3 shows a further exemplary embodiment in the representation corresponding to FIG. 2,
  • Figure 4 is a development of the end edge of the outer tube of Figure 3, and
  • 5 shows an alternative to FIG. 4.

Ein Schließ- und Regelorgan 1 besteht aus einem Innenrohr 2 und einem Außenrohr 3. Beide sind aus keramischem, feuerfesten Material gefertigt. Das Innenrohr 2 ist in eine feuerfeste Auskleidung 4 eines Zwischengefäßes 5 luft- und schmelzedicht eingemörtelt und mündet in eine Freilaufdüse 6 ein, durch welche bei geöffnetem Schließ- und/oder Regelorgan 1 Metallschmelze aus dem Inneren des Zwischengefäßes 5 herausströmt. Das Innenrohr 2 kann auch als Eintauchausguß verlängert sein.A closing and control element 1 consists of an inner tube 2 and an outer tube 3. Both are made of ceramic, refractory material. The inner pipe 2 is mortared airtight and meltproof in a refractory lining 4 of an intermediate vessel 5 and opens into a free-running nozzle 6 through which metal melt flows out of the interior of the intermediate vessel 5 when the closing and / or regulating member 1 is open. The inner tube 2 can also be extended as an immersion nozzle.

Das Außenrohr 3 ist durch Bolzen 7 mit einer Halterung 8 drehfest verbunden, die ihrerseits über eine Kardanlenkung 9 mit einem Antriebsarm 10 verbunden ist. Dieser lagert auf einem Lagerbock 11 des Zwischengefäßes 5 und weist an seinem äußeren Ende einen Hebelarm 12 auf, mit dessen Hilfe über den Antriebsarm 10 und die Kardanlenkung 9 ein Drehmoment auf die Halterung 8 und somit auf das Außenrohr 3 ausgeübt werden kann. Hierdurch ist das Außenrohr 3 gegenüber dem Innenrohr 2 in beiden Richtungen um die gemeinsame Längsachse 13 drehbar. Beim Ausführungsbeispiel nach Figur 3 ist das Außenrohr 3 zusätzlich in Richtung seiner Längsachse verschieblich. Beim Ausführungsbeispiel nach Figur 6 ist das Außenrohr 3 nur in Richtung seiner Längsachse 13 beweglich.The outer tube 3 is non-rotatably connected by bolts 7 to a holder 8, which in turn is connected to a drive arm 10 via a cardan link 9. This is supported on a bearing block 11 of the intermediate vessel 5 and has a lever arm 12 at its outer end, with the aid of which a torque can be exerted on the holder 8 and thus on the outer tube 3 via the drive arm 10 and the cardan joint 9. As a result, the outer tube 3 can be rotated in both directions about the common longitudinal axis 13 with respect to the inner tube 2. In the embodiment of Figure 3, the outer tube 3 is also displaceable in the direction of its longitudinal axis. In the exemplary embodiment according to FIG. 6, the outer tube 3 can only be moved in the direction of its longitudinal axis 13.

Das Innenrohr 2 ist mit wenigstens einer Durchbrechung 14 versehen. Das Außenrohr 3 weist an seinem der Halterung 8 abgewandten Ende eine Stirnkante 15 auf. Es ist nicht mit einer der Durchbrechung 14 entsprechenden Durchbrechung versehen.The inner tube 2 is provided with at least one opening 14. The outer tube 3 has an end edge 15 at its end facing away from the holder 8. It is not provided with an opening corresponding to the opening 14.

Das Innenrohr 2 und das Außenrohr 3 bilden an ihrem Außenumfang in einem Axialbereich 16 Dichtflächen 17 bzw. 18, die schmelzedicht ineinander eingepaßt sind. Zwischen den Dichtflächen 17, 18 besteht ein Ringspalt 19.The inner tube 2 and the outer tube 3 form on their outer circumference in an axial region 16 sealing surfaces 17 and 18, which are fitted into one another in a melt-tight manner. There is an annular gap 19 between the sealing surfaces 17, 18.

Beim Ausführungsbeispiel nach Figur 2 ist das Innenrohr 2 mit nur einer Durchbrechung 14 versehen. Die Stirnkante 15 weist eine bzw. zwei erste Zonen 20, von denen die eine in Figur 2 strichliert dargestellt ist, eine zweite Zone 21 und eine dritte Zone 22 auf. Die ersten Zonen 20 verlaufen schräg zwischen der zweiten Zone 21 und der dritten Zone 22. Insgesamt liegen die genannten Zonen auf einer zur Längsachse 13 schrägen Ebene.In the embodiment of Figure 2, the inner tube 2 is provided with only one opening 14. The end edge 15 has one or two first zones 20, one of which is shown in broken lines in FIG. 2, a second zone 21 and a third zone 22. The first zones 20 run obliquely between the second zone 21 and the third zone 22. Overall, the zones mentioned lie on a plane oblique to the longitudinal axis 13.

In Figur 2 ist das Außenrohr 3 in seiner Öffnungsstellung dargestellt. Die zweite Zone 21 steht oberhalb der Durchbrechung 14, so daß diese zur Schmelze hin vollständig offen ist.In Figure 2, the outer tube 3 is shown in its open position. The second zone 21 is above the opening 14 so that it is completely open to the melt.

Wird das Außenrohr 3 aus dieser Öffnungsstellung um die Längsachse 13 gedreht, dann geht je nach der Drehrichtung die strichliert dargestellte erste Zone 20 oder die über der Schnittebene der Figur 2 liegende erste Zone über die Durchbrechung 14 hinweg. Dabei wird die Durchbrechung 14 je nach der Drehgeschwindigkeit und dem Schrägverlauf der ersten Zone mehr oder weniger allmählich vom Außenrohr 3 abgedeckt. Die beiden ersten Zonen 20 brauchen nicht den gleichen und auch keinen linearen Schrägverlauf aufzuweisen. Sie können so gestaltet sein, daß bei gleichen Drehwinkeln in der einen Richtung die Durchbrechung 14 schneller abgedeckt wird als bei gleichen Drehwinkeln in der anderen Drehrichtung. Durch eine entsprechende Gestaltung des Schrägverlaufs der ersten Zone 20 läßt sich auch erreichen, daß eine linear proportionale Abhängigkeit zwischen der Drehung des Außenrohrs 3 und dem freien Querschnitt der Durchbrechung 14, also der Durchflußmenge besteht.If the outer tube 3 is rotated about the longitudinal axis 13 from this open position, then, depending on the direction of rotation, the first zone 20 shown in broken lines or the first zone lying above the sectional plane of FIG. 2 passes over the opening 14. The opening 14 is covered more or less gradually by the outer tube 3 depending on the speed of rotation and the slope of the first zone. The first two zones 20 do not need to have the same and also no linear oblique course. They can be designed in such a way that the opening 14 is covered more quickly at the same angles of rotation in one direction than at the same angles of rotation in the other direction of rotation. By designing the inclined course of the first zone 20 accordingly, it can also be achieved that there is a linearly proportional dependency between the rotation of the outer tube 3 and the free cross section of the opening 14, that is to say the flow rate.

Ist das Außenrohr 3 um 180° gedreht, dann steht es in seiner Schließstellung. Die dritte Zone 22 steht jetzt unterhalb der Durchbrechung, so daß diese vollständig abgedeckt ist.If the outer tube 3 is rotated by 180 °, then it is in its closed position. The third zone 22 is now below the opening so that it is completely covered.

Beim Einfüllen von Schmelze in das leere Zwischengefäß 5 ist das Außenrohr 3 in seine Schließstellung gebracht. Das Innenrohr 2 und das Außenrohr 3 sind kälter als die eingefüllte Schmelze. Die Stirnkante 15 mit ihren Zonen 20, 21, 22 liegt für die Schmelze offen und schließt keine Schmelzenregionen ein, die sonst an dem Außenrohr 3 zu Pfropfen einfrieren könnten. Momentane, regionale Teileinfrierungen lösen sich unter der Wirkung der kontaktierenden Schmelze auf, was durch die schiebende Bewegung der ersten Zone 20 beim Drehen des Außenrohrs 3 unterstützt ist. Das Außenrohr 3 läßt sich also, wenn der gewünschte Spiegel der Schmelze in dem Zwischengefäß 5 erreicht ist, sofort in seine Öffnungsstellung bringen, wobei der Ausfluß der Schmelze durch die Durchbrechung 14 nicht durch eingefrorene Regionen behindert ist.When filling the melt into the empty intermediate vessel 5, the outer tube 3 is brought into its closed position. The inner tube 2 and the outer tube 3 are colder than the filled melt. The end edge 15 with its zones 20, 21, 22 is open to the melt and does not include any melt regions that could otherwise freeze into grafts on the outer tube 3. Current, regional partial freezes dissolve under the action of the contacting melt, which is supported by the pushing movement of the first zone 20 when the outer tube 3 is rotated. The outer tube 3 can thus, when the desired level of the melt in the intermediate vessel 5 is reached, be brought into its open position immediately, the outflow of the melt through the opening 14 not being hindered by frozen regions.

Beim Ausführungsbeispiel nach Figur 2 verläuft die Stirnkante 15 selbst in ihren einzelnen Zone 20, 21, 22 radial zur Längsachse 13. Es ist jedoch auch möglich, die Stirnkante 15 so zu gestalten, daß sie in einer, mehreren oder allen Zonen 20, 21, 22 in einem Winkel W1 oder W2 schräg zur Längsachse 13 liegt. Durch die Winkel W1 bzw. W2 lassen sich in den Zonen 20, 21 die Einströmverhältnisse der Schmelze in die Durchbrechung 14 beeinflussen. Durch den Winkel W2 der dritten Zone 22 ist erreicht, daß die Schmelze beim Einfüllen in das Gefäß nicht in eine spitzwinklige oder rechtwinklige, sondern in eine stumpfwinklige Region eintritt, was die Gefahr von Einfrierungen weiter vermindert.In the exemplary embodiment according to FIG. 2, the end edge 15 itself runs radially to the longitudinal axis 13 in its individual zone 20, 21, 22. However, it is also possible to design the end edge 15 in such a way that it is in one, several or all zones 20, 21, 22 lies at an angle W1 or W2 obliquely to the longitudinal axis 13. The angles W1 and W2 in zones 20, 21 can influence the inflow conditions of the melt into the opening 14. The angle W2 of the third zone 22 ensures that the melt does not enter an acute-angled or right-angled, but rather an obtuse-angled region when it is filled into the vessel, which further reduces the risk of freezing.

Beim Ausführungsbeispiel nach Figur 3 weist das Innenrohr 2 zwei diametral gegenüberliegende Durchbrechungen 14 auf. Dementsprechend sind die ersten, zweiten und dritten Zonen 20, 21, 22 an der Stirnkante 15 paarweise vorgesehen. In den Figuren 4 und 5 sind mögliche Verläufe der Stirnkante 15 abgewickelt dargestellt. In Figur 3 und entsprechend den Figuren 4 und 5 ist die Öffnungsstellung des Außenrohrs 3 gezeigt. Die Zone 21 liegt oberhalb der Durchbrechungen 14, so daß diese offen sind.In the exemplary embodiment according to FIG. 3, the inner tube 2 has two diametrically opposite openings 14. Accordingly, the first, second and third zones 20, 21, 22 are provided in pairs on the front edge 15. In Figures 4 and 5 possible courses of the end edge 15 are shown unwound. In Figure 3 and corresponding to Figures 4 and 5, the opening position of the outer tube 3 is shown. Zone 21 lies above openings 14 so that they are open.

Bei der Ausführung nach Figur 4 verlaufen die Zonen 20 jeweils stumpfwinklig zur Zone 21, aus der sie in die Zone 22 übergehen. Sie weisen jeweils den gleichen stumpfen Winkel zur Zone 21 bzw. 22 auf. Dadurch ist erreicht, daß bei einem Drehen des Außenrohrs 3 die beiden Durchbrechungen 14 gleich schnell geschlossen werden, unabhängig davon, ob das Außenrohr 3 in Richtung des Pfeiles r oder in Richtung des Pfeiles l (vgl. Figur 4) gegenüber dem Innenrohr 2 gedreht wird. Ist das Außenrohr 3 um 90° gegenüber der Schließstellung gedreht, dann sind beide Durchbrechungen 14 geschlossen, wobei die Zonen 22 dann unterhalb der Durchbrechungen 14 stehen. Ein Vorlauf des Schließens der einen Durchbrechung 14 gegenüber der anderen Durchbrechung 14 ließe sich dadurch erreichen, daß die Durchbrechungen 14 oder die Zonen 21 am Umfang abweichend von 180° gegeneinander versetzt sind. Die gleiche Gestaltung der Zonen 20 in beiden Drehrichtungen l, r hat den Vorteil, daß dann, wenn nach längerem Betrieb des Außenrohrs 3 in der einen Drehrichtung die jeweils links der Durchbrechungen 14 liegenden Zonen 20 verschlissen sein sollten, der Betrieb in der anderen Drehrichtung erfolgen kann, so daß dann die rechts der Durchbrechung 14 liegenden Zonen 20 verschlissen werden können, ohne daß sich an dem Ausströmverhalten, bezogen auf den jeweiligen Drehwinkel des Außenrohrs 3, etwas ändert.In the embodiment according to FIG. 4, zones 20 each run at an obtuse angle to zone 21, from which they merge into zone 22. They each have the same obtuse angle to zone 21 or 22. It is thereby achieved that when the outer tube 3 is rotated, the two openings 14 are closed at the same speed, regardless of whether the outer tube 3 is rotated in the direction of arrow r or in the direction of arrow l (see FIG. 4) with respect to the inner tube 2 . If the outer tube 3 is rotated by 90 ° with respect to the closed position, then both openings 14 are closed, the zones 22 then being below the openings 14. A forward run of the closing of one opening 14 with respect to the other opening 14 could be achieved in that the openings 14 or the zones 21 are offset from one another at the circumference, deviating from 180 °. The same design of the zones 20 in both directions of rotation l, r has the advantage that if, after prolonged operation of the outer tube 3 in one direction of rotation, the zones 20 to the left of the openings 14 should be worn, the operation takes place in the other direction of rotation can, so that the zones 20 to the right of the opening 14 are worn out can be changed without changing the outflow behavior, based on the respective angle of rotation of the outer tube 3.

Bei der Ausführung nach Figur 5 verlaufen die ersten Zonen 20, die in der Öffnungsstellung beidseitig jeder der beiden Durchbrechungen 14 liegen, in verschiedenen Winkeln. Dadurch ist erreicht, daß bei einem Drehen des Außenrohrs 3 in Richtung des Pfeiles l die Durchbrechungen 14 schneller geschlossen werden, als bei einer Drehung des Außenrohrs 3 in Richtung des Pfeiles r.In the embodiment according to FIG. 5, the first zones 20, which in the open position are on both sides of each of the two openings 14, run at different angles. It is thereby achieved that when the outer tube 3 is rotated in the direction of the arrow 1, the openings 14 are closed more quickly than when the outer tube 3 is rotated in the direction of the arrow r.

Bei dem Ausführungsbeispiel nach Figur 3 ist zusätzlich vorgesehen, daß das Außenrohr 3 parallel zur Längsachse 13 um einen Hub H verschoben werden kann. Dieser Hub H ist so bemessen, daß das Außenrohr 3 dann, wenn es in seiner Öffnungsstellung steht, also die zweiten Zonen 21 oberhalb der Durchbrechungen 14 liegen, in Richtung des Pfeiles N so weit niedergedrückt werden kann, daß die zweiten Zonen 21 der Stirnkante 15 danach unterhalb der Durchbrechungen 14 stehen. Dies ist für Störungsfälle günstig, in denen sich das Außenrohr 3 nicht mehr um die Längsachse 13 drehen läßt. Durch die Verschiebung des Außenrohrs 3 in Richtung des Pfeiles N lassen sich in diesem Fall die Durchbrechungen 14 verschließen. Es kann auch vorgesehen sein, daß dabei eine Innenfläche 23 des Außenrohrs 3 das oben offene Innenrohr 2 abschließt.In the embodiment according to FIG. 3 it is additionally provided that the outer tube 3 can be displaced by a stroke H parallel to the longitudinal axis 13. This stroke H is dimensioned such that the outer tube 3, when it is in its open position, that is to say the second zones 21 lie above the openings 14, can be depressed so far in the direction of the arrow N that the second zones 21 of the end edge 15 then stand below the openings 14. This is favorable for malfunctions in which the outer tube 3 can no longer be rotated about the longitudinal axis 13. By moving the outer tube 3 in the direction of arrow N, the openings 14 can be closed in this case. It can also be provided that an inner surface 23 of the outer tube 3 closes the inner tube 2, which is open at the top.

Im Rahmen der Erfindung liegen zahlreiche weitere Ausführungsbeispiele. Diese ergeben sich insbesondere durch eine Anwendung von Teilmerkmalen eines der beschriebenen Ausführungsbeispiele auf ein anderes der beschriebenen Ausführungsbeispiel.Numerous further exemplary embodiments are within the scope of the invention. These result in particular from the application of partial features of one of the exemplary embodiments described to another of the exemplary embodiments described.

Claims (8)

  1. Closure and/or control element for tapping liquid metal melt from a metallurgical vessel with a fixed inner tube, which has at least one opening, and with an outer tube, which has an end edge extending around the periphery of the inner tube and which is rotatable about the longitudinal axis of the tubes and/or is slidable in the longitudinal direction relative to the inner tube from a closed position, in which the opening is covered by the outer tube, into such an open position in which the metal melt flows through the opening into the inner tube, characterised in that the end edge (15) comprises the following three zones: a first zone (20), which passes over the opening (14) when the outer tube (3) is rotated about the longitudinal axis (13), a second zone (21), which, in the open position of the outer tube (3), is on the one side of the opening, seen in the longitudinal axial direction, and a third zone (22), which, in the closed position of the outer tube (3), is on the other side of the opening (14), seen in the longitudinal axial direction (Figures 2 to 5).
  2. Closure and/or control element as claimed in Claim 1, characterised in that the end edge (15) extends on a plane which is oblique to the longitudinal axis (13) (Fig. 2).
  3. Closure and/or control element as claimed in Claim 1, characterised in that the first zones (20) are connected at an obtuse angle to the second zone (21) and the third zone (22).
  4. Closure and/or control element as claimed in Claim 3, characterised in that the first zones (20) are connected at the same obtuse angles to the second zone (21) and/or the third zone (22) (Figure 4).
  5. Closure and/or control element as claimed in Claim 3, characterised in that the first zones (20) are connected at different obtuse angles to the second zone (21) and/or the third zone (22) (Figure 5).
  6. Closure and/or control element as claimed in one of the preceding Claims 1 to 5, characterised in that the oblique shape of the first zone (20) constitutes a control curve for the inflow of melt into the opening (14) in dependence on the angle of rotation of the outer tube (3).
  7. Closure and/or control element as claimed in one of the preceding Claims 1 to 6, characterised in that the outer tube (3) may be slid so far out of the open position in the longitudinal axial direction that the second zone (21) of the end edge (15) is moved beyond the opening (14) (Figure 3).
  8. Closure and/or control element as claimed in one of the preceding Claims 1 to 7, characterised in that the zones (20, 21, 22) of the end edge (15) extend at at least an angle (W1, W2) to radial planes of the longitudinal axial direction.
EP90103288A 1989-04-11 1990-02-21 Shut-off and/or control element for a metallurgical vessel Expired - Lifetime EP0392168B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90103288T ATE83414T1 (en) 1989-04-11 1990-02-21 CLOSING AND/OR CONTROL ORGAN FOR A METALLURGICAL VESSEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911736 1989-04-11
DE3911736A DE3911736C2 (en) 1989-04-11 1989-04-11 Closing and / or regulating element for a metallurgical vessel

Publications (2)

Publication Number Publication Date
EP0392168A1 EP0392168A1 (en) 1990-10-17
EP0392168B1 true EP0392168B1 (en) 1992-12-16

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EP90103288A Expired - Lifetime EP0392168B1 (en) 1989-04-11 1990-02-21 Shut-off and/or control element for a metallurgical vessel

Country Status (13)

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US (1) US5223157A (en)
EP (1) EP0392168B1 (en)
JP (1) JPH02293591A (en)
KR (1) KR0169722B1 (en)
CN (1) CN1019759B (en)
AT (1) ATE83414T1 (en)
BR (1) BR9001662A (en)
CA (1) CA2014245A1 (en)
DE (2) DE3911736C2 (en)
ES (1) ES2037486T3 (en)
GR (1) GR3006888T3 (en)
RU (1) RU2016698C1 (en)
ZA (1) ZA902152B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926678C2 (en) * 1989-08-12 1994-09-01 Didier Werke Ag Closing and regulating device for a metallurgical vessel
US5939016A (en) * 1996-08-22 1999-08-17 Quantum Catalytics, L.L.C. Apparatus and method for tapping a molten metal bath
US5855835A (en) * 1996-09-13 1999-01-05 Hewlett Packard Co Method and apparatus for laser ablating a nozzle member
KR100364195B1 (en) * 2000-06-12 2002-12-11 한국기계연구원 Method for making a minute parts using excimer laser beam
NO315031B1 (en) * 2002-02-06 2003-06-30 Sigmund Rekkedal Dosing valve with eccentric open function with force torque for gravity casting of liquid metal
KR100832771B1 (en) * 2007-11-05 2008-05-27 주식회사 케너텍 Thermal storage container
CN104197722B (en) * 2014-08-28 2016-03-23 南京理工大学连云港研究院 A kind of drawing mechanism controlling smelt flow in melting furnace
CN109967754A (en) * 2019-05-09 2019-07-05 广东仁开科技有限公司 A kind of online water conservancy diversion open and close system of high temperature tin melt

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB670729A (en) * 1949-06-10 1952-04-23 Clifford Harry Armstrong Improvements in and relating to valves
US3651998A (en) * 1970-09-23 1972-03-28 Metallurg Exoproducts Corp Nozzle for a pouring ladle
FR2367568A1 (en) * 1976-10-14 1978-05-12 Daussan & Co PREHEATING DEVICE FOR CASTING DISTRIBUTORS WITH SHUTTERS
US4279266A (en) * 1980-04-23 1981-07-21 Halliburton Company Sleeve valve
DE3423157C1 (en) * 1984-06-22 1985-06-20 Metacon AG, Zürich Fireproof pair of plates for pivoting or rotating sliding closures
DE3540202C1 (en) * 1985-11-13 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Inflow regulating element for mould level control in a continuous casting plant
DE3731600A1 (en) * 1987-09-19 1989-04-06 Didier Werke Ag TURNTABLE CLOSURE FOR A METALURIGAN TUBE AND ROTOR AND / OR STATOR FOR SUCH A TURNOVER
DE3809072A1 (en) * 1988-03-18 1989-09-28 Didier Werke Ag TURN AND / OR SLIDE LOCK AND ITS LOCKING PARTS

Also Published As

Publication number Publication date
DE3911736C2 (en) 1994-02-24
ATE83414T1 (en) 1993-01-15
ES2037486T3 (en) 1993-06-16
KR0169722B1 (en) 1999-01-15
US5223157A (en) 1993-06-29
GR3006888T3 (en) 1993-06-30
DE59000590D1 (en) 1993-01-28
CN1046300A (en) 1990-10-24
CN1019759B (en) 1992-12-30
CA2014245A1 (en) 1990-10-11
KR900015842A (en) 1990-11-10
JPH02293591A (en) 1990-12-04
RU2016698C1 (en) 1994-07-30
BR9001662A (en) 1991-05-14
ZA902152B (en) 1990-12-28
DE3911736A1 (en) 1990-10-18
EP0392168A1 (en) 1990-10-17

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