EP0407712B1 - Refractory stator/rotor unit for a nozzle gate in a vessel holding molten metal - Google Patents
Refractory stator/rotor unit for a nozzle gate in a vessel holding molten metal Download PDFInfo
- Publication number
- EP0407712B1 EP0407712B1 EP90109647A EP90109647A EP0407712B1 EP 0407712 B1 EP0407712 B1 EP 0407712B1 EP 90109647 A EP90109647 A EP 90109647A EP 90109647 A EP90109647 A EP 90109647A EP 0407712 B1 EP0407712 B1 EP 0407712B1
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- EP
- European Patent Office
- Prior art keywords
- rotor
- stator
- opening
- unit
- tubular member
- 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
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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
Definitions
- the invention relates to a refractory stator / rotor unit for a closure in the spout of a metal-containing container, consisting of a tubular stator fastened in the container wall and a rotor guided by the latter within the container, the unit being at least one transverse and starting from it has an opening leading out of the container, which can be made more or less coincident by rotating and / or longitudinally displacing the rotor and causing the closure to open or close.
- Such a closure is preferably suitable for containers in continuous casting plants, from which molten metal is poured into a mold in a controlled manner.
- the closure is controlled by means of a control process in such a way that a quantity of melt which keeps the mold fill level constant flows from the container into the mold.
- the closure serving as an actuator places high demands on precisely metered pouring.
- a closure of the type described at the beginning shows, inter alia, a stator fastened in the vessel wall and a rotor guided therein within the vessel, the rotor being both rotatable and longitudinally displaceable by a rotor arranged above the vessel Drive is held.
- Transverse inlet openings in the walls of the stator or rotor and a longitudinal opening extending therefrom in the stator enable the molten metal to be poured off when the openings of these tubular closure parts are covered.
- relatively small torsional, tensile or other forces act on the rotor or stator, which is made of ceramic material.
- the closure may no longer be able to be closed and the melt flow may no longer be interrupted.
- the present invention is therefore based on the object of developing a refractory stator / rotor unit according to the type described at the outset in such a way that increased operational reliability is achieved in a simple manner.
- the rotor is formed with two tube pieces which are arranged concentrically to one another and provided with transverse openings and which form the stator sealed inside and outside. If one piece of pipe becomes jammed, the other one that is still functioning, after breaking the first, allows the pouring to be stopped easily or even conditionally continued pouring. In addition, this rotor, which is sensitive to bending forces, is reinforced by the double wall and is therefore less prone to breakage.
- the closure with the other - protected - pipe section is ensured.
- the latter advantageously has a larger opening than that of the control element and serves primarily as a safety closing element.
- the opening is preferably seen in the direction of displacement at least three times as long as that of the stator, respectively. of the inner pipe section. Seen radially, the openings of the pipe sections lie approximately on one axis, but can be offset from one another in such a way that when the outer pipe section is closed, the inner pipe ends in the closed position. This prevents residual melt from remaining in the transverse opening of the stator, which would freeze and clog the opening. Further advantageous embodiment variants of arrangements of the openings are explained in the description below.
- the rotor can be guided out of the container at the top and can be displaced by a drive rod engaging there, or it can also be guided through the stator and driven to be rotatable and / or longitudinally displaceable from below the container.
- FIG. 1 shows a closure 20 in a partially illustrated container 10, which has a steel jacket 12 and a refractory lining 14, in which a refractory tubular stator 21 of the closure 20 is embedded in the container spout. At its upper end it is annular and, according to the invention, is in sealing contact with a cylindrical surface of a tube piece 25, 26 of a refractory rotor 22 on its inner or outer cylindrical surface.
- the transverse openings 27, 24, 28 of the pipe sections 26, 25 or the stator 21 overlap and, together with the central opening 23 in the rotor 22 and stator 21, allow the melt to flow out of the container 10 in a continuous casting mold or the like.
- the rotor 22 rests on an annular shoulder 29 of the stator 21. It is rotatably connected to a drive rod 18 which engages in its lower part and protects it in the area of the melt by means of its refractory tubular part. Seen in the image plane, the rod 18 is articulated to the rotor 22 on its driving pin 19 and is driven at its upper end by a swivel or rotary motor 15 via an articulated connection 17 and a drive mechanism 16 fastened to the container 10.
- the amount of melt to be poured is regulated via the openings 28, 24 of the inner tube piece 25 and of the stator 21, which are of the same size, while the ones formed as recesses Openings 27 of the outer pipe section 26 are larger.
- This pipe section 26 serves as a purely safety closing element, which is used in particular and ensures safe closing if the inner pipe section jams and breaks off in the stator or if leaks occur between the two.
- the openings 27 designed as recesses are preferably three times as large as the opening 24 of the stator 21 when viewed in the direction of rotation 51. This ensures that the flow cross-section from the fully open to the closed position is formed only by the two openings 24 and 28 and always changes linearly due to the elongated openings, which can also be seen from FIG.
- the openings 27, 24, 28 of the stator / rotor unit could of course all be of the same size, or that of the inner tube section could be larger in the opposite sense compared to the other two.
- FIG 3 a staggered arrangement of the opening 27 of an outer tube piece 26 'to the opening 28 of the inner tube piece 25 is also shown in dash-dot lines as a variant.
- the opening 27 reaches the closed position before the opening 28, as a result of which the residual melt runs out of the transverse stator opening 24.
- FIG. 4 shows the closure 20 in the closed position, the inner tube piece 25 as a variant having a longitudinal groove 37 on its cylindrical outer surface, which extends from the transverse opening 24 of the stator 21 and extends to the end face of the tube piece 25. It in turn ensures that the residual melt flows out of the stator opening 24, so that this opening 24 is not clogged with frozen melt when the closure is reopened.
- the longitudinal openings 37 are shown in dash-dotted lines in FIG.
- the stator / rotor unit 21, 22 according to FIG. 4 also has compared to that of Figure 1 the difference that the rotor 22 rests on the head side 21 'of the stator 21.
- the closure 30 according to FIG. 5 differs from the closure 20 only in that its rotor 32 is longitudinally displaceable in relation to the fixed tubular stator 31 via a rod 18 'in the vertical direction for opening or closing the closure.
- the rod 18 ' holds the rotor 32 via a type of ball bearing, which allows deviations in the axis course from the rotor to the stator to be compensated for in the operating state.
- the outer tube section 36 of the rotor 32 has such a length relative to the inner tube section 35 that its lower edge 36 'is in the fully open position over the openings 34, 38 of the stator 31 or the inner tube section 35 provided for regulated casting.
- this closure 30 can also be constructed such that the rotor 32 can be displaced in the direction of rotation in addition to the longitudinal adjustment, for example for fine adjustment.
- On the rod 18 ' would then be additionally provided a rotary connection to the rotor 32.
- the stator 31 is again tubular and can extend over the length of the container wall, while a casting tube is connected to this stator sleeve 31 at the bottom.
- the inner tube pieces 25, 35 of the closures 20, 30 described are cone-shaped, which has a favorable effect on their strength.
- FIG. 6 shows a closure 40, which in turn has a tubular refractory stator 41 mortared in the container spout and a refractory rotor 42 guided therein.
- the mushroom-shaped rotor 42 is adjustable below the container 10 by a drive, not shown, in the direction of rotation.
- the rotor 42 consists of an inner and an outer tube piece 45, 46, which surround the stator 41 in the region of the interior of the vessel, sealing inside and outside.
- the melt flows in the open position of the closure through the transverse openings 47, 44, 48 of the rotor or stator and through a central flow opening 49 in the rotor 42.
- the opening 47 of the outer tube section 46 is designed so that you a kind of security locking function is assigned, ie if the actual seal between the stator 41 and the inner tube 45 is no longer present, the pouring process can thus be continued or interrupted with the outer tube 46.
- the invention is particularly suitable for vertically arranged stator / rotor units, but it could preferably also be used with the closure 40 for horizontal casting.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
- Manufacture Of Motors, Generators (AREA)
- Processing Of Solid Wastes (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Sliding Valves (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Die Erfindung betrifft eine feuerfeste Stator/Rotor-Einheit für einen Verschluss im Ausguss eines Metallschmelze enthaltenden Behälters, bestehend aus einem in der Behälterwandung befestigten rohrförmigen Stator und aus einem von diesem innerhalb des Behälters geführten Rotor, wobei die Einheit mindestens eine quere und von dieser ausgehend eine aus dem Behälter führende Oeffnung aufweist, die durch Verdrehen und/oder Längsverschieben des Rotors mehr oder weniger in Deckung bringbar sind und ein Oeffnen oder Schliessen des Verschlusses bewirken.The invention relates to a refractory stator / rotor unit for a closure in the spout of a metal-containing container, consisting of a tubular stator fastened in the container wall and a rotor guided by the latter within the container, the unit being at least one transverse and starting from it has an opening leading out of the container, which can be made more or less coincident by rotating and / or longitudinally displacing the rotor and causing the closure to open or close.
Ein solcher Verschluss eignet sich vorzugsweise für Behälter bei Stranggiessanlagen, von denen aus Metallschmelze in eine Kokille geregelt abgegossen wird. Ueber einen Regelvorgang wird der Verschluss so angesteuert, dass eine den Kokillen-Füllstand konstant haltende Schmelzemenge aus dem Behälter in die Kokille fliesst. An den als Stellglied dienenden Verschluss sind dabei hohe Anforderungen für ein genau dosiertes Abgiessen gestellt.Such a closure is preferably suitable for containers in continuous casting plants, from which molten metal is poured into a mold in a controlled manner. The closure is controlled by means of a control process in such a way that a quantity of melt which keeps the mold fill level constant flows from the container into the mold. The closure serving as an actuator places high demands on precisely metered pouring.
Bei einem Verschluss der eingangs beschriebenen Gattung (DE-A-37 31 600) ist unter anderem ein in der Gefässwandung befestigter Stator und ein in diesem innerhalb des Gefässes geführter Rotor gezeigt, wobei der Rotor sowohl drehbar wie auch längsverschiebbar durch einen über dem Gefäss angeordneten Antrieb gehalten ist. Quere Einlauföffnungen in den Wandungen des Stators bzw. Rotors und eine davon ausgehende Längsöffnung im Stator ermöglichen in überdeckter Position der Oeffnungen dieser rohrförmigen Verschlussteile ein Abgiessen der Metallschmelze. Auf den aus keramischem Material bestehenden Rotor bzw. Stator wirken im normalen Betriebszustand relativ kleine Torsions-, Zug- oder andere Kräfte. Wenn jedoch beispielsweise zwischen den beiden Verschlussteilen infiltrierende und sodann einfrierende Schmelze ein Verklemmen des Rotors in dem Stator bewirkt, kann der Verschluss möglicherweise nicht mehr geschlossen und damit der Schmelzabfluss nicht mehr unterbrochen werden.A closure of the type described at the beginning (DE-A-37 31 600) shows, inter alia, a stator fastened in the vessel wall and a rotor guided therein within the vessel, the rotor being both rotatable and longitudinally displaceable by a rotor arranged above the vessel Drive is held. Transverse inlet openings in the walls of the stator or rotor and a longitudinal opening extending therefrom in the stator enable the molten metal to be poured off when the openings of these tubular closure parts are covered. In the normal operating state, relatively small torsional, tensile or other forces act on the rotor or stator, which is made of ceramic material. However, if, for example, melt infiltrating and then freezing between the two closure parts causes the rotor to jam in the stator, the closure may no longer be able to be closed and the melt flow may no longer be interrupted.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine feuerfeste Stator/Rotor-Einheit nach der eingangs beschriebenen Gattung derart weiterzubilden, dass mit ihr eine erhöhte Betriebssicherheit auf einfache Art und Weise erzielt wird.The present invention is therefore based on the object of developing a refractory stator / rotor unit according to the type described at the outset in such a way that increased operational reliability is achieved in a simple manner.
Die Aufgabe ist erfindungsgemäss dadurch gelöst, dass der Rotor mit zwei konzentrisch zueinander angeordneten, mit queren Oeffnungen versehenen Rohrstücken ausgebildet ist, welche den Stator innen und aussen abdichtend umgeben. Bei einem möglichen Verklemmen des einen Rohrstückes erlaubt das andere noch funktionierende, nach einem Bruch des Ersten, einen problemlosen Abbruch des Abgiessens oder sogar ein bedingtes Weitergiessen. Zudem ist dieser auf Biegekräfte empfindliche Rotor durch die Doppelwandung verstärkt und daher weniger bruchgefährdet.The object is achieved according to the invention in that the rotor is formed with two tube pieces which are arranged concentrically to one another and provided with transverse openings and which form the stator sealed inside and outside. If one piece of pipe becomes jammed, the other one that is still functioning, after breaking the first, allows the pouring to be stopped easily or even conditionally continued pouring. In addition, this rotor, which is sensitive to bending forces, is reinforced by the double wall and is therefore less prone to breakage.
Bei starkem Verschleiss und damit möglicher Undichtheit des eigentlichen Regelorganes, das vorzugsweise durch den Stator und durch das innere Rohrstück gebildet ist, ist das Verschliessen mit dem anderen - geschonten - Rohrstück gesichert. Letzteres hat dabei vorteilhaft eine grössere Oeffnung als die des Regelorganes und dient primär als Sicherheits-Schliessorgan. Die Oeffnung ist vorzugsweise in Verschieberichtung gesehen mindestens dreimal so lang wie die des Stators resp. des inneren Rohrstückes. Die Oeffnungen der Rohrstücke liegen dabei radial gesehen annähernd auf einer Achse, können aber derart versetzt zueinander sein, dass beim Verschliessen das äussere Rohrstück vor dem inneren in Schliessstellung gelangt. Dadurch wird verhindert, dass Restschmelze in der queren Oeffnung des Stators verbleibt, die einfrieren und die Oeffnung verstopfen würde. Weitere vorteilhafte Ausführungsvarianten von Anordnungen der Oeffnungen sind in der nachstehenden Beschreibung erläutert.In the event of heavy wear and thus possible leakage of the actual control element, which is preferably formed by the stator and by the inner pipe section, the closure with the other - protected - pipe section is ensured. The latter advantageously has a larger opening than that of the control element and serves primarily as a safety closing element. The opening is preferably seen in the direction of displacement at least three times as long as that of the stator, respectively. of the inner pipe section. Seen radially, the openings of the pipe sections lie approximately on one axis, but can be offset from one another in such a way that when the outer pipe section is closed, the inner pipe ends in the closed position. This prevents residual melt from remaining in the transverse opening of the stator, which would freeze and clog the opening. Further advantageous embodiment variants of arrangements of the openings are explained in the description below.
Der Rotor kann oben aus dem Behälter geführt sein und von einer dort angreifenden Antriebsstange verschiebbar sein oder er kann auch durch den Stator geführt und von unterhalb des Behälters dreh- und/oder längsverschiebbar angetrieben sein.The rotor can be guided out of the container at the top and can be displaced by a drive rod engaging there, or it can also be guided through the stator and driven to be rotatable and / or longitudinally displaceable from below the container.
Die Erfindung ist nachstehend anhand von Ausführungsbeispielen näher erläutert. Es zeigt:
- Fig.1
- einen Längsschnitt eines Verschlusses mit einer erfindungsgemässen Stator/Rotor-Einheit,
- Fig.2
- eine Seitenansicht der Stator/Rotor-Einheit nach Fig. 1,
- Fig.3
- einen Querschnitt der Einheit nach Fig.1 entlang den Linien III-III,
- Fig.4 und Fig.5
- Varianten von Einheiten jeweils im Teilschnitt und
- Fig.6
- einen Längschnitt eines Verschlusses mit einem unterhalb des Behälters angetriebenen Rotor.
- Fig. 1
- 2 shows a longitudinal section of a closure with a stator / rotor unit according to the invention,
- Fig. 2
- 2 shows a side view of the stator / rotor unit according to FIG. 1,
- Fig. 3
- 2 shows a cross section of the unit according to FIG. 1 along lines III-III,
- Fig.4 and Fig.5
- Variants of units in partial section and
- Fig. 6
- a longitudinal section of a closure with a rotor driven below the container.
Fig.1 zeigt einen Verschluss 20 in einem teilweise dargestellten Behälter 10, der einen Stahlmantel 12 sowie eine feuerfeste Auskleidung 14 hat, in der im Behälterausguss ein feuerfester rohrförmiger Stator 21 des Verschlusses 20 eingebettet ist. An seinem oberen Ende ist er ringförmig ausgebildet und steht an seiner inneren respektive äusseren Zylinderfläche erfindungsgemäss mit je einer zylindrischen Fläche eines Rohrstückes 25, 26 eines feuerfesten Rotors 22 in abdichtender Berührung. In der gezeigten Offenstellung des Verschlusses 20 überdecken sich die queren Oeffnungen 27, 24, 28 der Rohrstücke 26, 25 bzw. des Stators 21 und ermöglichen zusammen mit der zentrischen Oeffnung 23 im Rotor 22 und Stator 21 ein Abfliessen der Schmelze aus dem Behälter 10 in eine Stranggiesskokille oder dergleichen.1 shows a
Der Rotor 22 liegt gemäss Fig.2 an einem ringförmigen Absatz 29 des Stators 21 auf. Er ist mit einer in seinem unteren Teil angreifenden Antriebsstange 18 drehbar verbunden und schützt diese im Bereich der Schmelze durch seinen feuerfesten rohrförmigen Teil. In der Bildebene gesehen ist die Stange 18 an ihrem Mitnehmerbolzen 19 zum Rotor 22 gelenkig gelagert und sie ist an ihrem oberen Ende über eine Gelenkverbindung 17 und einen am Behälter 10 befestigten Antriebsmechanismus 16 von einem Schwenk- oder Drehmotor 15 angetrieben.According to FIG. 2, the
Das Regulieren der abzugiessenden Schmelzemenge erfolgt über die Oeffnungen 28, 24 des inneren Rohrstückes 25 und des Stators 21, die von derselben Grösse sind, während die als Ausnehmungen ausgebildeten Oeffnungen 27 des äusseren Rohrstückes 26 grösser sind. Dieses Rohrstück 26 dient dabei als reines Sicherheits-Schliessorgan, das insbesondere dann zum Einsatz kommt und für ein sicheres Schliessen sorgt, wenn das innere Rohrstück im Stator verklemmt und abbricht oder wenn Undichtheiten zwischen diesen beiden auftreten. Die als Ausnehmung ausgebildeten Oeffnungen 27 sind in Drehrichtung 51 gesehen vorzugsweise dreimal so gross wie die Oeffnung 24 des Stators 21. Dadurch ist gesichert, dass der Durchflussquerschnitt von der vollen Offen- bis zur Schliessstellung nur durch die beiden Oeffnungen 24 bzw. 28 gebildet ist und sich dabei durch die länglichen Oeffnungen stets linear ändert, was auch aus der Fig.3 ersichtlich ist. Die Oeffnungen 27, 24, 28 der Stator/Rotor-Einheit könnten selbstverständlich alle auch von gleicher Grösse sein, oder aber die des inneren Rohrstückes könnte in umgekehrtem Sinne gegenüber den beiden andern grösser sein.The amount of melt to be poured is regulated via the
In Fig.3 ist ferner als Variante eine versetzte Anordnung der Oeffnung 27 eines äusseren Rohrstückes 26′ zu der Oeffnung 28 des inneren Rohrstückes 25 strichpunktiert gezeigt. Die Oeffnung 27 erreicht die Schliessstellung vor der Oeffnung 28, wodurch die Restschmelze aus der queren Statoröffnung 24 ausläuft.In Figure 3, a staggered arrangement of the opening 27 of an outer tube piece 26 'to the opening 28 of the
In Fig.4 ist der Verschluss 20 in Schliessstellung gezeigt, wobei als Variante das innere Rohrstück 25 an seiner zylindrischen Aussenfläche eine Längsnut 37 hat, die von der queren Oeffnung 24 des Stators 21 ausgeht und sich bis zur Stirnseite des Rohrstückes 25 erstreckt. Mit ihr ist wiederum ein Ausfliessen der Restschmelze aus der Statoröffnung 24 gewährleistet, wodurch diese Oeffnung 24 beim Wiederöffnen des Verschlusses nicht mit eingefrorener Schmelze verstopft ist. Die Längsöffnungen 37 sind ergänzungshalber noch in Fig.3 strichpunktiert dargestellt. Die Stator/Rotor-Einheit 21, 22 gemäss der Fig.4 hat zudem gegenüber der nach Fig.1 den Unterschied, dass der Rotor 22 an der Kopfseite 21′ des Stators 21 aufliegt.4 shows the
Der Verschluss 30 nach Fig.5 unterscheidet sich von dem Verschluss 20 nur insofern, als sein Rotor 32 gegenüber dem feststehenden rohrförmigen Stator 31 über eine Stange 18′ in Höhenrichtung längsverschiebbar zum Oeffnen bzw. Schliessen des Verschlusses bewegbar ist. Die Stange 18′ hält den Rotor 32 über eine Art Kugellagerung, die es erlaubt, dass Abweichungen des Achsverlaufes vom Rotor zum Stator im Betriebszustand ausgeglichen werden. Das äussere Rohrstück 36 des Rotors 32 hat gegenüber dem inneren Rohrstück 35 eine solche Länge, dass seine Unterkante 36′ in voller Offenstellung sich über den zum regulierten Abgiessen vorgesehenen Oeffnungen 34, 38 des Stators 31 bzw. des inneren Rohrstückes 35 befindet. In Schliessstellung (strichpunktiert gezeigt) sind die Statoröffnungen 34 dann auch vom äusseren Rohrstück 36 von der Schmelze abgedeckt. Erfindungsgemäss kann dieser Verschluss 30 auch so konstruiert sein, dass der Rotor 32 nebst der Längsverstellung beispielsweise zum Feinregulieren in Drehrichtung verschiebbar ist. An der Stange 18′ wäre dann zusätzlich eine Drehverbindung zum Rotor 32 vorzusehen. Der Stator 31 ist wiederum rohrförmig ausgebildet und kann sich über die Länge der Behälterwandung erstrecken, während unten an diese Statorhülse 31 ein Giessrohr angeschlossen ist.The
Die inneren Rohrstücke 25, 35 der beschriebenen Verschlüsse 20, 30 sind zapfenförmig ausgebildet, was sich günstig auf ihre Festigkeit auswirkt.The
Fig.6 zeigt einen Verschluss 40, der wiederum einen im Behälterausguss eingemörtelten rohrförmigen feuerfesten Stator 41 und einen in diesem geführten feuerfesten Rotor 42 aufweist. Der pilzförmige Rotor 42 ist unterhalb des Behälters 10 von einem nicht näher dargestellten Antrieb in Drehrichtung verstellbar.FIG. 6 shows a
Nach der Erfindung besteht der Rotor 42 aus einem inneren und einem äusseren Rohrstück 45, 46, welche den Stator 41 im Bereich des Gefässinnern innen und aussen abdichtend umgeben. Ausgehend vom Inneren des Behälters 10 fliesst die Schmelze in Offenstellung des Verschlusses durch die queren Oeffnungen 47, 44, 48 des Rotors bzw. Stators und durch eine zentrale Durchflussöffnung 49 im Rotor 42. Die Oeffnung 47 des äusseren Rohrstückes 46 ist so ausgebildet, dass ihr eine Art Sicherheits-Schliessfunktion zukommt, d.h. wenn die eigentliche Abdichtung zwischen dem Stator 41 und dem inneren Rohrstück 45 nicht mehr gegeben ist, kann damit der Abgiessvorgang mit dem äusseren Rohrstück 46 weitergeführt oder unterbrochen werden.According to the invention, the
Die Erfindung eignet sich insbesondere für senkrecht angeordnete Stator/Rotor-Einheiten, sie liesse sich jedoch vorzugsweise mit dem Verschluss 40 auch für horizontales Abgiessen anwenden.The invention is particularly suitable for vertically arranged stator / rotor units, but it could preferably also be used with the
Claims (13)
- Refractory stator/rotor unit for a valve (20) in the outlet of a vessel (10) containing a metal melt, comprising a tubular stator (21, 31, 41) secured in the vessel wall (14) and a rotor (22, 32, 42) guided by it within the vessel (10), whereby the unit has at least one transverse opening (24, 27, 28; 34, 38; 44, 47, 48) and an opening (23, 49) starting from it and leading out of the vessel, which openings are movable by rotation and/or longitudinal movement of the rotor (22, 32, 42) more or less into alignment and effect opening or closing of the valve (20), characterised in that the rotor (22, 32, 42) is constructed with two tubular members (25, 26, 35, 36, 45, 46) which are arranged concentrically with one another and are provided with transverse openings (27, 28, 38, 47, 48) and which extend sealingly around the stator (21, 31, 41) internally and externally.
- Unit as claimed in Claim 1, characterised in that the inner or outer tubular member (25, 26, 35, 36, 45, 46) and the stator (21, 31, 41) each have at least one transverse opening (28, 24, 38, 34, 44, 48) of approximately the same size serving to regulate the pouring of the volume of melt whilst the other tubular member (26, 36, 46, 25, 35, 45) is constructed as a safety closure element and has one or more transverse openings (27, 47) which are larger than the opening (24, 34, 44) in the stator (21, 31, 41).
- Unit as claimed in Claim 2, characterised in that the opening (27, 47) in the outer tubular member (26, 36, 46) has a length in the direction of movement which is at least three times that of the stator opening (24, 34, 44).
- Unit as claimed in one of Claims 1, 2 or 3, characterised in that the centres of the openings (27, 28, 47, 48) in the two tubular members (25, 26, 45, 46) extend radially approximately on one axis.
- Unit as claimed in one of Claims 2 or 3, characterised in that the openings (27, 28) in the outer and the inner tubular members (25, 26') are offset in the direction of movement of the rotor (22) such that, on closing, the outer tubular member (26, 25) reaches the closed position before the inner one.
- Unit as claimed in one of the preceding claims, characterised in that the inner tubular member (25) has at least one longitudinal groove (37) in its outer surface which is in registry, in the closed position of the valve (20), with the respective stator opening (24) in order to make outflow of remaining residual melt from this stator opening (24) possible.
- Unit as claimed in one of the preceding claims, characterised in that the rotor (22, 32), which passes upwardly out of the vessel, is rotationally and/or longitudinally movably connected to a drive rod (18, 18').
- Unit as claimed in Claim 7, characterised in that the outer tubular member (36) on a longitudinally movable rotor (32) has a lower end face (36') which is situated above the transverse opening (38) in the inner tubular member (35).
- Unit as claimed in one of Claims 1 to 5, characterised in that the rotor (42) is guided by the stator (41) and may be driven in rotation and/or longitudinally slidably from below the vessel (10).
- Unit as claimed in Claim 9, characterised in that the rotor (42) is of mushroom shaped construction and its inner tubular member (45) has at least one transverse opening (48) and at least one opening (49) which starts from it and leads downwardly out of the vessel (19).
- Refractory rotor for a unit as claimed in one of the preceding claims, characterised in that its top portion is constructed with two tubular members (25, 26, 35, 36, 45, 46) which are arranged concentrically with one another and are provided with transverse openings (27, 28, 38, 47, 48).
- Rotor as claimed in Claim 11, characterised in that the opening (27, 28) in the outer tubular member (26) is larger than that in the inner tubular member (25) or vice versa.
- Rotor as claimed in Claim 11, characterised in that its inner tubular member (25, 35) is of peg-shaped construction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH593/89 | 1989-02-20 | ||
| CH2593/89A CH681435A5 (en) | 1989-07-11 | 1989-07-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0407712A2 EP0407712A2 (en) | 1991-01-16 |
| EP0407712A3 EP0407712A3 (en) | 1992-05-06 |
| EP0407712B1 true EP0407712B1 (en) | 1995-08-16 |
Family
ID=4237264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90109647A Expired - Lifetime EP0407712B1 (en) | 1989-07-11 | 1990-05-21 | Refractory stator/rotor unit for a nozzle gate in a vessel holding molten metal |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5085356A (en) |
| EP (1) | EP0407712B1 (en) |
| JP (1) | JPH0352759A (en) |
| CN (1) | CN1048670A (en) |
| AT (1) | ATE126460T1 (en) |
| BR (1) | BR9003263A (en) |
| CA (1) | CA2020741A1 (en) |
| CH (1) | CH681435A5 (en) |
| DE (1) | DE59009527D1 (en) |
| ES (1) | ES2076255T3 (en) |
| GR (1) | GR3017827T3 (en) |
| IL (1) | IL94682A (en) |
| ZA (1) | ZA904508B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9206394D0 (en) * | 1992-03-24 | 1992-05-06 | Crane Ltd | A stopper device |
| WO1995001236A1 (en) * | 1993-07-02 | 1995-01-12 | Frank W. Schaefer, Inc. | Low pressure casting process and apparatus |
| US5590681A (en) * | 1993-07-02 | 1997-01-07 | Frank W. Schaefer, Inc. | Valve assembly |
| CH688712A5 (en) * | 1994-07-22 | 1998-01-30 | Stopinc Ag | Vessel closure member on the spout of a molten metal containing. |
| FR2765316B1 (en) * | 1997-06-30 | 1999-11-12 | Vesuvius France Sa | ELECTRIC OVEN WITH Eccentric Casting Hole and Method for Making Steel in the Furnace |
| JP4924913B2 (en) * | 2004-10-29 | 2012-04-25 | 東海高熱工業株式会社 | Opening and closing device for ash melting furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU591889B2 (en) * | 1985-03-26 | 1989-12-21 | British Steel Plc | Improvements in or relating to outlet valves for metal containing vessels |
| JPS63264256A (en) * | 1987-04-20 | 1988-11-01 | Tokyo Yogyo Co Ltd | Flow rate control device for continuous casting |
| JPS63264255A (en) * | 1987-04-20 | 1988-11-01 | Tokyo Yogyo Co Ltd | Flow rate control device for continuous casting |
| 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 |
| CH676811A5 (en) * | 1988-09-29 | 1991-03-15 | Stopinc Ag |
-
1989
- 1989-07-11 CH CH2593/89A patent/CH681435A5/de not_active IP Right Cessation
-
1990
- 1990-05-21 DE DE59009527T patent/DE59009527D1/en not_active Expired - Fee Related
- 1990-05-21 AT AT90109647T patent/ATE126460T1/en not_active IP Right Cessation
- 1990-05-21 ES ES90109647T patent/ES2076255T3/en not_active Expired - Lifetime
- 1990-05-21 EP EP90109647A patent/EP0407712B1/en not_active Expired - Lifetime
- 1990-06-10 IL IL94682A patent/IL94682A/en not_active IP Right Cessation
- 1990-06-11 ZA ZA904508A patent/ZA904508B/en unknown
- 1990-06-19 US US07/540,627 patent/US5085356A/en not_active Expired - Fee Related
- 1990-07-09 CA CA002020741A patent/CA2020741A1/en not_active Abandoned
- 1990-07-09 BR BR909003263A patent/BR9003263A/en not_active Application Discontinuation
- 1990-07-10 JP JP2180724A patent/JPH0352759A/en active Pending
- 1990-07-10 CN CN90104516A patent/CN1048670A/en active Pending
-
1995
- 1995-10-20 GR GR950402922T patent/GR3017827T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0407712A3 (en) | 1992-05-06 |
| CA2020741A1 (en) | 1991-01-12 |
| ES2076255T3 (en) | 1995-11-01 |
| ATE126460T1 (en) | 1995-09-15 |
| ZA904508B (en) | 1991-04-24 |
| JPH0352759A (en) | 1991-03-06 |
| IL94682A0 (en) | 1991-04-15 |
| GR3017827T3 (en) | 1996-01-31 |
| EP0407712A2 (en) | 1991-01-16 |
| DE59009527D1 (en) | 1995-09-21 |
| US5085356A (en) | 1992-02-04 |
| CH681435A5 (en) | 1993-03-31 |
| CN1048670A (en) | 1991-01-23 |
| BR9003263A (en) | 1991-08-27 |
| IL94682A (en) | 1993-04-04 |
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