EP0734801A1 - Device for controlling an inflow of metal by means of a stopper - Google Patents

Device for controlling an inflow of metal by means of a stopper Download PDF

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Publication number
EP0734801A1
EP0734801A1 EP96104202A EP96104202A EP0734801A1 EP 0734801 A1 EP0734801 A1 EP 0734801A1 EP 96104202 A EP96104202 A EP 96104202A EP 96104202 A EP96104202 A EP 96104202A EP 0734801 A1 EP0734801 A1 EP 0734801A1
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EP
European Patent Office
Prior art keywords
casting
module box
plug
lifting rod
stopper
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Granted
Application number
EP96104202A
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German (de)
French (fr)
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EP0734801B2 (en
EP0734801B1 (en
Inventor
Markus Schmid
Hans Gloor
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Concast Standard AG
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Concast Standard AG
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/20—Stopper-rod operating equipment

Definitions

  • the invention relates to a device for regulating a metal inflow from a casting vessel into a casting mold according to the features of the preamble of claim 1.
  • stopper control devices for pans and continuous vessels have been known for a long time.
  • new requirements have arisen for regulating the flow of metal in continuous casting molds.
  • the exact adherence to a predetermined bath level, automatic pouring, quick reaction in the event of breakthroughs etc. are tasks for which many proposed solutions have been developed in recent years.
  • a device for regulating a metal inflow from a casting vessel into a continuous casting mold for a steel strand is known.
  • a plug that can be raised and lowered works together with a pouring nozzle.
  • the stroke of the stopper can be done on the one hand by means of a drive, e.g. a piston-cylinder unit, and, on the other hand, can be operated manually in an emergency via a joint lever.
  • the metal inflow can be controlled according to a predetermined program by means of a computer and / or by means of a bath level measuring device.
  • the invention has for its object to provide a stopper control device which overcomes the aforementioned disadvantages and in particular leaves the classic stopper actuation concept, which provides for manual intervention on a stopper regulating lever at the start or in emergency situations.
  • the plug control should also have a significantly higher regulation accuracy and regulation speed in order to further improve the strand quality. Also, for all malfunctions that occur in practice, such as breakthroughs, plug wear and nozzle washing, Al 2 O 3 deposits, etc., predetermined sequence programs should be able to be used automatically or via remote control.
  • the new plug actuation concept is intended to save personnel costs during commissioning and service, but also during the casting operation itself.
  • the plugs can usually be raised and lowered in relation to the spout nozzle.
  • plugs are also known which control the outflow regulation by means of a rotary movement.
  • the Guide device for a lifting and lowering stopper consisting of a lifting rod and a guide.
  • the device for regulating the metal flow can be attached to any casting vessel that has to carry out programmed or remote-controlled casting processes.
  • the device according to one embodiment can be used particularly effectively in intermediate vessels for multi-strand systems.
  • Such intermediate vessels have up to eight pouring nozzles, each with a stopper regulation.
  • the air overpressure can advantageously be built up via an air circulation system, the air flowing through the module box, the lifting rod and a plug support arm as the cooling medium. Additional protection against heating of the module box is obtained if an open air gap is arranged between the wall of the casting vessel and the module box during assembly.
  • Precise flow control requires high stroke accuracy, a high movement speed of the lifting rod and a minimum of moving parts between the lifting rod and the servo motor.
  • the control accuracy can be further increased if the vertical guidance of the lifting rod consists of a longitudinal bearing with ball bearings and its length is 50 - 80% of the intermediate vessel height (bottom-lid support).
  • a handwheel can be coupled to the spindle of the ball screw drive in the sense of an additional training.
  • accumulators, spring assemblies etc. which are pressurized are known in the prior art. Such devices cause additional investment and maintenance costs and are poorly suited for a module solution. According to an advantageous exemplary embodiment, it is proposed to arrange a signal transmitter in the power supply for rapid detection of a power failure and in the electric drive supply capacitors, the capacitance of which is sufficient for a program-controlled emergency closing movement of the stopper in the event of a power failure.
  • an emergency slide with a locking block is assigned to the pouring nozzle.
  • a continuous casting mold 3 represents a casting mold.
  • a pouring nozzle 4 interacts with a liftable and lowerable stopper 5 and regulates the flow of steel from the intermediate vessel 2 into the continuous casting mold 3.
  • the steel flow into the mold 3 is determined according to a predetermined program, for example a pouring program. and / or controlled by a bath level measuring device 7.
  • the refractory stopper 5 surrounds the stopper rod 8, which is connected to a lifting rod 10 via an arm 9.
  • the lifting rod 10 is arranged in a vertical guide 12, which in this example consists of a longitudinal guide with ball bearings.
  • a computer-controlled electromechanical drive in the form of a servo motor 13 is arranged in a module box 15 together with the lifting rod 10 and its vertical guide 12.
  • the module box 15 is fastened to the intermediate vessel 2 with interchangeable clamping elements 16.
  • 15 suspension devices 17 are provided on the module box.
  • the clamping elements 16 are designed as quick clamping and centering elements.
  • An open air gap 20 is arranged between the wall 19 of the intermediate vessel 2 and the module box 15.
  • the module box 15 is closed in a dust-tight manner by a cover 21 and an air overpressure can be built up via a compressed air connection 22.
  • the excess air pressure is part of an air circulation system 23, which is represented by an arrow.
  • the air circulation system 23 in the module box serves as a cooling medium for the motor 13, a ball screw drive 27, 28, the lifting rod 10 and the plug support arm 9.
  • a drive axis 25 of the motor 13 is connected to the ball screw 27 via a flexible, angularly rigid coupling 26.
  • the spindle 27 forms, together with a nut 28, a ball screw drive, the nut 28 and the lifting rod 10 being rigidly connected to one another via a bridge 29.
  • the path of the nut 28 is transmitted directly to the lifting rod 10 via the bridge 29.
  • the drive shaft 25 with the spindle 27 are arranged in parallel and at a short distance from the lifting rod 10 in the module box 15.
  • a handwheel 30 is arranged, which can be coupled to the spindle 27 and permits height adjustment of the lifting rod 10 when the electrical connection cable is unplugged from the motor.
  • a signal generator 33 is connected, which detects a power failure and reports a computer in the control cabinet 34.
  • capacitors are arranged in the electrical drive supply, the capacitance of which is sufficient for a program-controlled emergency closing movement of the stopper in the event of a power failure.
  • a stopper control device is also subject to faults that originate from the refractory side, such as breaking off refractory parts on the stopper, breaking or washing out the pouring nozzle, etc.
  • an emergency slide controlled by a piston-cylinder unit is required 36 attached to the intermediate vessel bottom.
  • the outflow nozzle 4 can be closed with a locking block of the emergency slide 36 and, if necessary, a pouring tube can be separated at the same time.
  • the medium for actuating the emergency slide is supplied by an accumulator.
  • Intermediate vessels for continuous casting plants are provided with up to eight plugs, each plug having its own module box and its own control system. If the intermediate vessel is brought from the preheating position into the casting position via the molds or into a filling position near the casting position, the plug drive motor is connected to the control cabinet 34 by means of electrical plug connections 37 before the casting begins. After this connection, the stopper movement is controlled exclusively by electrical signals from the start of casting. All transmission means known in the prior art, such as wire, light guide, radio, infrared etc., can be used for remote control.

Abstract

The appts. incorporates a plug operating mechanism (10,12)which together with its computer-controlled electromechanical drive (13) is housed in a box module (15). This module is exchangeably fixed to the casting ladle by means of clamping elements (16). The drive motor is connected to a control unit via plug contacts (37), so that the plug motion during casting is exclusively controlled by electrical signals from this unit to the drive motor.

Description

Die Erfindung betrifft eine Vorrichtung zum Regeln eines Metallzuflusses aus einem Giessgefäss in eine Giessform gemäss den Merkmalen des Oberbegriffes von Anspruch 1.The invention relates to a device for regulating a metal inflow from a casting vessel into a casting mold according to the features of the preamble of claim 1.

Beim Giessen von Metallen, insbesondere von Stahl, sind Stopfenregeleinrichtungen bei Pfannen und Durchlaufgefässen seit langem bekannt. Mit der Einführung des Stranggiessens sind an die Regelung des Metallzuflusses in Stranggiesskokillen neue Anforderungen entstanden. Die genaue Einhaltung einer vorbestimmten Badspiegelhöhe, ein automatisches Angiessen, schnelle Reaktion bei Durchbrüchen etc. sind Aufgabenstellungen, für die in den letzten Jahren viele Lösungsvorschläge erarbeitet wurden.In the casting of metals, in particular steel, stopper control devices for pans and continuous vessels have been known for a long time. With the introduction of continuous casting, new requirements have arisen for regulating the flow of metal in continuous casting molds. The exact adherence to a predetermined bath level, automatic pouring, quick reaction in the event of breakthroughs etc. are tasks for which many proposed solutions have been developed in recent years.

Allen diesen Vorschlägen für eine Mechanisierung und Automatisierung einer Stopfenregeleinrichtung lag ein Sicherheitskonzept zugrunde, das beim Angiessen, bei einem Durchbruch, bei einem Kokillenüberlauf etc. ein rasches Eingreifen von Hand an einer an der Hubstange angreifenden Hebeleinrichtung vorsah. Als Antrieb für programmgesteuerte Bewegungen der Hubstange bzw. der Stopfenstange haben sich in der Praxis Hydrauliksteuerungen durchgesetzt. Vorschläge für Elektroantriebe haben aus verschiedenen Gründen in Stahlwerken wenig Eingang gefunden. Der unkontrollierte Verschleiss von Stopfen und Ausgussdüsen, eine sich während des Giessens laufend verändernde Schliessgrundstellung des Stopfens, die Einhaltung einer vorbestimmten Schliesskraft zwischen Stopfen und Ausgussdüse etc. sind mittels hydraulischen Antrieben in der Praxis befriedigend gelöst worden.All of these suggestions for mechanizing and automating a stopper control system were based on a safety concept which, when cast on, in the event of a breakthrough, in the case of a mold overflow, provided for rapid manual intervention on a lever device acting on the lifting rod. Hydraulic controls have established themselves in practice as drives for program-controlled movements of the lifting rod or the plug rod. Proposals for electric drives have found little use in steel mills for various reasons. The uncontrolled wear of plugs and pouring nozzles, a constantly changing basic position of the plug during casting, compliance with a predetermined closing force between the plug and pouring nozzle etc. have been satisfactorily solved in practice by means of hydraulic drives.

Aus EP-Publikation 0 444 297 A2, die den Oberbegriff von Anspruch 1 bildet, ist eine Vorrichtung zum Regeln eines Metallzuflusses aus einem Giessgefäss in eine Stranggiesskokille für einen Stahlstrang bekannt. Ein heb- und senkbarer Stopfen wirkt mit einer Ausgussdüse zusammen. Der Hub des Stopfens kann einerseits mittels einem Antrieb, z.B. einer Kolbenzylindereinheit, und anderseits im Notfall von Hand über einen Gelenkhebel betätigt werden. Beim Angiessen einer Stranggiesskokille kann der Metallzufluss nach einem vorbestimmten Programm mittels einem Rechner und/oder mittels einer Badspiegelmesseinrichtung gesteuert werden.From EP publication 0 444 297 A2, which forms the preamble of claim 1, a device for regulating a metal inflow from a casting vessel into a continuous casting mold for a steel strand is known. A plug that can be raised and lowered works together with a pouring nozzle. The stroke of the stopper can be done on the one hand by means of a drive, e.g. a piston-cylinder unit, and, on the other hand, can be operated manually in an emergency via a joint lever. When casting a continuous casting mold, the metal inflow can be controlled according to a predetermined program by means of a computer and / or by means of a bath level measuring device.

Neben rechnergesteuerten Giessprogrammen, die auch ein Verschliessen der Ausgussdüse bei einem Strangdurchbruch beinhalten können, ist es jederzeit möglich, die hydraulische Steuerung auszuschalten und durch ein manuelles Eingreifen am Gelenkhebel sowohl den Giessbetrieb bei Störungen als auch bei Notfällen zu übernehmen. Solche Störungen können Kokillenüberläufe, Stopfen und/oder Ausgussdüsenverschleiss, Durchbrüche, Al2 O3 Ablagerungen etc. sein.In addition to computer-controlled casting programs, which can also include closing the pouring nozzle in the event of a strand breakthrough, it is possible to switch off the hydraulic control at any time and by manual intervention on the Articulated lever to take over the casting operation in the event of faults as well as in emergencies. Such disturbances can be mold overflows, stoppers and / or pouring nozzle wear, breakthroughs, Al 2 O 3 deposits etc.

Das Konzept mit einem manuellen Füllen der Kokille beim Angiessen über einen Gelenkhebel verhindert eine einfache Kompakteinrichtung.The concept of manually filling the mold when casting on using an articulated lever prevents simple compact setup.

Der Erfindung liegt die Aufgabe zugrunde, eine Stopfenregeleinrichtung zu schaffen, die die vorgenannten Nachteile überwindet und insbesondere das klassische Stopfenbetätigungskonzept, das ein manuelles Eingreifen an einem Stopfenregulierhebel beim Start oder bei Notsituationen vorsieht, verlässt. Die Stopfensteuerung soll im weiteren eine wesentlich höhere Reguliergenauigkeit und Reguliergeschwindigkeit aufweisen, um die Strangqualität weiter zu verbessern. Auch sollen für alle in der Praxis vorkommenden Störungsfälle, wie Durchbrüche, Stopfenverschleiss und Düsenauswaschungen, Al2 O3 Ablagerungen etc., vorbestimmte Ablaufprogramme automatisch oder über eine Fernsteuerung einsetzbar sein. Das neue Stopfenbetätigungskonzept soll Personalkosten bei der Inbetriebnahme und im Service, aber auch beim Giessbetrieb selbst einsparen.The invention has for its object to provide a stopper control device which overcomes the aforementioned disadvantages and in particular leaves the classic stopper actuation concept, which provides for manual intervention on a stopper regulating lever at the start or in emergency situations. The plug control should also have a significantly higher regulation accuracy and regulation speed in order to further improve the strand quality. Also, for all malfunctions that occur in practice, such as breakthroughs, plug wear and nozzle washing, Al 2 O 3 deposits, etc., predetermined sequence programs should be able to be used automatically or via remote control. The new plug actuation concept is intended to save personnel costs during commissioning and service, but also during the casting operation itself.

Gemäss der Erfindung wird diese Aufgabe durch die Summe der Merkmale von Anspruch 1 gelöst.According to the invention, this object is achieved by the sum of the features of claim 1.

Mit der erfindungsgemässen Vorrichtung ist eine manuelle Stopfenbetätigung mittels der Hebeleinrichtung nicht mehr möglich. Jede Stopfenbewegung wird einem rechner- oder fernbedientem elektrischen Antrieb übertragen. Sich anbahnende Störungsfälle werden durch Erfassung entsprechender Parameter rechtzeitig erkannt und über vorbestimmte Programme entsprechend korrigiert. Durch das frühe Erkennen von sich anbahnenden Störungen kann die Strangqualität, insbesondere die Strangoberfläche, verbessert werden. Die Weglassung aller hydraulischen Antriebs- und Steuerelemente vereinfacht sowohl die Inbetriebnahme der Anlage als auch den Unterhalt solcher Stopfenregeleinrichtungen. Auch kann Giesspersonal weiter eingespart und die Sicherheit erhöht werden. Der Verzicht auf die Ausrüstung mit einem Gelenkhebel schliesst auch alle durch den Gelenkhebel verursachte Trägheitsmomente aus.With the device according to the invention, manual plug actuation by means of the lever device is no longer possible. Each stopper movement is transmitted to a computer or remote-controlled electrical drive. Impending malfunctions are recognized in good time by recording appropriate parameters and corrected accordingly using predetermined programs. The strand quality, in particular the strand surface, can be improved by early detection of impending disturbances. The omission of all hydraulic drive and control elements simplifies both the commissioning of the system and the maintenance of such plug control devices. Foundry personnel can also be saved further and security increased. Dispensing with the use of an articulated lever also excludes all moments of inertia caused by the articulated lever.

Für die Ausflussregelung sind die Stopfen gegenüber der Ausgussdüse in der Regel heb- und senkbar. Es sind aber auch Stopfen bekannt, die durch eine Drehbewegung die Ausflussregelung steuern. Gemäss einem Ausführungsbeispiel besteht die Führungseinrichtung für einen heb- und senkbaren Stopfen aus einer Hubstange und einer Führung.The plugs can usually be raised and lowered in relation to the spout nozzle. However, plugs are also known which control the outflow regulation by means of a rotary movement. According to an embodiment, the Guide device for a lifting and lowering stopper consisting of a lifting rod and a guide.

Die Vorrichtung zum Regeln des Metallzuflusses kann an jedes Giessgefäss, das programmierte oder ferngesteuerte Giessvorgänge zu erfüllen hat, angebracht werden. Um Personal auf einer Stranggiessanlage einsparen zu können, kann die Vorrichtung gemäss einem Ausführungsbeispiel besonders wirkungsvoll bei Zwischengefässen für Mehrstranganlagen angewendet werden. Solche Zwischengefässe weisen bis zu acht Ausgussdüsen mit je einer Stopfenregulierung auf.The device for regulating the metal flow can be attached to any casting vessel that has to carry out programmed or remote-controlled casting processes. In order to be able to save personnel on a continuous caster, the device according to one embodiment can be used particularly effectively in intermediate vessels for multi-strand systems. Such intermediate vessels have up to eight pouring nozzles, each with a stopper regulation.

Um im rauhen Stahlwerksbetrieb die Verschmutzung, den Verschleiss und die Störanfälligkeit bei solchen Regelvorrichtungen zu reduzieren, wird zusätzlich vorgeschlagen, im Modulkasten einen Luftüberdruck vorzusehen.In order to reduce pollution, wear and tear and susceptibility to failure in such control devices in rough steelworks operation, it is additionally proposed to provide an air overpressure in the module box.

Es ist grundsätzlich möglich, ein im Stand der Technik bekanntes Kühlsystem für den Modulkasten vorzusehen. Gemäss einem Ausführungsbeispiel kann mit Vorteil der Luftüberdruck über ein Luftzirkulationssystem aufgebaut werden, wobei die Luft den Modulkasten, die Hubstange und einen Stopfenträgerarm als Kühlmedium durchfliesst. Ein zusätzlicher Schutz gegen Erwärmung des Modulkastens ergibt sich, wenn bei der Montage zwischen der Wand des Giessgefässes und dem Modulkasten ein offener Luftspalt angeordnet ist.It is fundamentally possible to provide a cooling system for the module box known in the prior art. According to one embodiment, the air overpressure can advantageously be built up via an air circulation system, the air flowing through the module box, the lifting rod and a plug support arm as the cooling medium. Additional protection against heating of the module box is obtained if an open air gap is arranged between the wall of the casting vessel and the module box during assembly.

Um Unterhalts- und Kontrollarbeiten in entsprechenden Werkstätten durchführen zu können, und um die Vorbereitungszeit am Zwischengefäss möglichst klein zu halten, wird zusätzlich vorgeschlagen, am Modulkasten eine Einrichtung zum Aufhängen am Giessgefäss anzuordnen und Schnellspannelemente für eine starre Befestigung vorzusehen.In order to be able to carry out maintenance and inspection work in appropriate workshops and to keep the preparation time on the intermediate vessel as short as possible, it is additionally proposed to arrange a device on the module box for hanging on the casting vessel and to provide quick-release elements for rigid attachment.

Eine genaue Durchflussregelung erfordert eine hohe Hubgenauigkeit, eine hohe Bewegungsgeschwindigkeit der Hubstange und ein Minimum an beweglichen Teilen zwischen der Hubstange und dem Servomotor. Um dies zu erreichen und um gleichzeitig eine entsprechend lange Führung der Hubstange sicherzustellen, wird, gemäss einem weiteren Ausführungsbeispiel, vorgeschlagen, die Antriebsachse des Motors und die Hubstange zusammen mit ihrer Führung parallel zueinander im Modulkasten anzuordnen und die Drehbewegung des Motors direkt auf einen Kugelgewindetrieb und von diesem wiederum direkt auf die Hubstange zu übertragen. Die Regelgenauigkeit kann weiter gesteigert werden, wenn die Vertikalführung der Hubstange aus einer kugelgelagerten Längsführung besteht und ihre Länge 50 - 80 % der Zwischengefässhöhe (Boden- Deckelauflage) beträgt.Precise flow control requires high stroke accuracy, a high movement speed of the lifting rod and a minimum of moving parts between the lifting rod and the servo motor. In order to achieve this and at the same time to ensure a correspondingly long guide of the lifting rod, it is proposed, according to a further exemplary embodiment, to arrange the drive axis of the motor and the lifting rod together with their guide parallel to one another in the module box and the rotary movement of the motor directly to a ball screw and from this in turn directly to the lifting rod. The control accuracy can be further increased if the vertical guidance of the lifting rod consists of a longitudinal bearing with ball bearings and its length is 50 - 80% of the intermediate vessel height (bottom-lid support).

Um den Stopfen bei der Zwischengefässvorbereitung, wie Stopfenmontage, Vorheizung etc., in seiner Höhenlage bewegen zu können, ist, im Sinne einer zusätzlichen Ausbildung, ein Handrad an die Spindel des Kugelgewindetriebes ankuppelbar.In order to be able to move the stopper in the intermediate position preparation, such as stopper assembly, preheating, etc., a handwheel can be coupled to the spindle of the ball screw drive in the sense of an additional training.

Um bei einem Stromausfall den Stopfen automatisch in Schliessposition zu bringen, sind im Stand der Technik mit Druck beaufschlagte Akkumulatoren, Federpakete etc. bekannt. Solche Vorrichtungen verursachen zusätzliche Investitions- und Unterhaltskosten und sind für eine Modullösung schlecht geeignet. Gemäss einem vorteilhaften Ausführungsbeispiel wird vorgeschlagen, in der Stromversorgung einen Signalgeber für eine schnelle Detektion eines Stromausfalles und in der elektrischen Antriebsspeisung Kondensatoren anzuordnen, deren Kapazität für eine programmgesteuerte Notschliessbewegung des Stopfens bei Stromausfall ausreicht.In order to automatically bring the stopper into the closing position in the event of a power failure, accumulators, spring assemblies etc. which are pressurized are known in the prior art. Such devices cause additional investment and maintenance costs and are poorly suited for a module solution. According to an advantageous exemplary embodiment, it is proposed to arrange a signal transmitter in the power supply for rapid detection of a power failure and in the electric drive supply capacitors, the capacitance of which is sufficient for a program-controlled emergency closing movement of the stopper in the event of a power failure.

Zur Erhöhung der Sicherheit bei Schäden an feuerfesten Teilen, wie Stopfenbrüche, unregelmässiger Düsenverschleiss etc., oder Störungen im Rechner etc., wird, gemäss einem weiteren Ausführungsbeispiel, der Ausgussdüse ein Notschieber mit einem Verschlussstein zugeordnet.In order to increase safety in the event of damage to refractory parts, such as plug breaks, irregular nozzle wear, etc., or faults in the computer, etc., according to a further exemplary embodiment, an emergency slide with a locking block is assigned to the pouring nozzle.

Im nachfolgenden soll anhand von Figuren die Erfindung zusätzlich erläutert werden.In the following, the invention will be additionally explained with reference to figures.

Dabei zeigen:

Fig. 1
einen Vertikalschnitt durch ein Zwischengefäss mit einer Stopfenregeleinrichtung und
Fig. 2
einen etwas vergrösserten Schnitt nach der Linie II-II von Fig. 1.
Show:
Fig. 1
a vertical section through an intermediate vessel with a plug control device and
Fig. 2
a somewhat enlarged section along the line II-II of Fig. 1st

In Fig. 1 und 2 ist ein Giessgefäss als Zwischengefäss 2 innerhalb einer Stahlstranggiessanlage dargestellt. Eine Stranggiesskokille 3 stellt eine Giessform dar. Eine Ausgussdüse 4 wirkt mit einem heb- und senkbaren Stopfen 5 zusammen und regelt den Stahlzufluss aus dem Zwischengefäss 2 in die Stranggiesskokille 3. Der Stahlzufluss in die Kokille 3 wird nach einem vorbestimmten Programm, z.B. einem Angiessprogramm, und/oder nach einer Badspiegelmesseinrichtung 7 gesteuert.1 and 2 show a casting vessel as an intermediate vessel 2 within a continuous steel casting plant. A continuous casting mold 3 represents a casting mold. A pouring nozzle 4 interacts with a liftable and lowerable stopper 5 and regulates the flow of steel from the intermediate vessel 2 into the continuous casting mold 3. The steel flow into the mold 3 is determined according to a predetermined program, for example a pouring program. and / or controlled by a bath level measuring device 7.

Der feuerfeste Stopfen 5 ummantelt die Stopfenstange 8, welche über einen Arm 9 mit einer Hubstange 10 verbunden ist. Die Hubstange 10 ist in einer Vertikalführung 12 angeordnet, die in diesem Beispiel aus einer kugelgelagerten Längsführung besteht. Ein rechnergesteuerter elektromechanischer Antrieb in der Form eines Servomotors 13 ist zusammen mit der Hubstange 10 und ihrer Vertikalführung 12 in einem Modulkasten 15 angeordnet. Der Modulkasten 15 ist am Zwischengefäss 2 mit Spannelementen 16 auswechselbar befestigt. Um ein leichtes Auswechseln zu gewährleisten, sind am Modulkasten 15 Aufhängeeinrichtungen 17 vorgesehen. Die Spannelemente 16 sind als Schnellspann- und Zentrierelemente ausgebildet. Zwischen der Wand 19 des Zwischengefässes 2 und dem Modulkasten 15 ist ein offener Luftspalt 20 angeordnet.The refractory stopper 5 surrounds the stopper rod 8, which is connected to a lifting rod 10 via an arm 9. The lifting rod 10 is arranged in a vertical guide 12, which in this example consists of a longitudinal guide with ball bearings. A computer-controlled electromechanical drive in the form of a servo motor 13 is arranged in a module box 15 together with the lifting rod 10 and its vertical guide 12. The module box 15 is fastened to the intermediate vessel 2 with interchangeable clamping elements 16. In order to ensure easy replacement, 15 suspension devices 17 are provided on the module box. The clamping elements 16 are designed as quick clamping and centering elements. An open air gap 20 is arranged between the wall 19 of the intermediate vessel 2 and the module box 15.

Der Modulkasten 15 ist durch einen Deckel 21 staubdicht verschlossen und über einen Pressluftanschluss 22 kann ein Luftüberdruck aufgebaut werden. Der Luftüberdruck ist Bestandteil eines Luftzirkulationssystems 23, das durch Pfeil dargestellt ist. Das Luftzirkulationssystem 23 im Modulkasten dient als Kühlmedium für den Motor 13, einen Kugelgewindetrieb 27, 28, die Hubstange 10 und den Stopfentragarm 9.The module box 15 is closed in a dust-tight manner by a cover 21 and an air overpressure can be built up via a compressed air connection 22. The excess air pressure is part of an air circulation system 23, which is represented by an arrow. The air circulation system 23 in the module box serves as a cooling medium for the motor 13, a ball screw drive 27, 28, the lifting rod 10 and the plug support arm 9.

Eine Antriebsachse 25 des Motors 13 ist über eine flexible, winkelstarre Kupplung 26 mit der Kugelgewindespindel 27 verbunden. Die Spindel 27 bildet zusammen mit einer Mutter 28 einen Kugelgewindetrieb, wobei die Mutter 28 und die Hubstange 10 über eine Brücke 29 starr miteinander verbunden sind. Ueber die Brücke 29 wird der Weg der Mutter 28 direkt auf die Hubstange 10 übertragen. Die Antriebsachse 25 mit der Spindel 27 sind parallel und mit geringem Abstand zur Hubstange 10 im Modulkasten 15 angeordnet.A drive axis 25 of the motor 13 is connected to the ball screw 27 via a flexible, angularly rigid coupling 26. The spindle 27 forms, together with a nut 28, a ball screw drive, the nut 28 and the lifting rod 10 being rigidly connected to one another via a bridge 29. The path of the nut 28 is transmitted directly to the lifting rod 10 via the bridge 29. The drive shaft 25 with the spindle 27 are arranged in parallel and at a short distance from the lifting rod 10 in the module box 15.

Am unteren Ende des Modulkastens 15 ist ein Handrad 30 angeordnet, das mit der Spindel 27 kuppelbar ist und eine Höhenverstellung der Hubstange 10 erlaubt, wenn das elektrische Anschlusskabel an den Motor ausgesteckt ist. Nach einer Verschiebung des Zwischengefässes 2 in die Giessposition wird der Modulkasten 15 wieder elektrisch mit dem Steuerschrank 34 verbunden und das Handrad 30 von der Spindel entkuppelt.At the lower end of the module box 15, a handwheel 30 is arranged, which can be coupled to the spindle 27 and permits height adjustment of the lifting rod 10 when the electrical connection cable is unplugged from the motor. After the intermediate vessel 2 has been moved into the casting position, the module box 15 is again electrically connected to the control cabinet 34 and the handwheel 30 is uncoupled from the spindle.

In der Stromversorgung 32 für den Motor 13 ist ein Signalgeber 33 angeschlossen, der einen Stromausfall detektiert und einem Rechner im Steuerschrank 34 meldet. Im weiteren sind in der elektrischen Antriebsspeisung Kondensatoren angeordnet, deren Kapazität für eine programmgesteuerte Notschliessbewegung des Stopfens bei Stromausfall ausreicht.In the power supply 32 for the motor 13, a signal generator 33 is connected, which detects a power failure and reports a computer in the control cabinet 34. In addition, capacitors are arranged in the electrical drive supply, the capacitance of which is sufficient for a program-controlled emergency closing movement of the stopper in the event of a power failure.

Eine Stopfenregeleinrichtung ist auch Störungen unterworfen, die von der Feuerfestseite herrühren, wie Abbrechen von feuerfesten Teilen am Stopfen, Brechen oder auswaschen der Ausgussdüse etc. Um ein Auslaufen des Zwischengefässes in einer Notsituation unabhängig von der Stopfensteuerung zu verhindern, ist ein mit einer Kolbenzylindereinheit gesteuerter Notschieber 36 am Zwischengefässboden angebracht. Mit einem Verschlussstein des Notschiebers 36 kann die Ausflussdüse 4 verschlossen und, wenn erforderlich, gleichzeitig ein Giessrohr abgetrennt werden. Das Medium für die Betätigung des Notschiebers wird von einem Akkumulator geliefert.A stopper control device is also subject to faults that originate from the refractory side, such as breaking off refractory parts on the stopper, breaking or washing out the pouring nozzle, etc. In order to prevent the intermediate vessel from leaking in an emergency situation regardless of the stopper control, an emergency slide controlled by a piston-cylinder unit is required 36 attached to the intermediate vessel bottom. The outflow nozzle 4 can be closed with a locking block of the emergency slide 36 and, if necessary, a pouring tube can be separated at the same time. The medium for actuating the emergency slide is supplied by an accumulator.

Zwischengefässe für Stranggiessanlagen sind mit bis zu acht Stopfen versehen, wobei jedem Stopfen ein eigener Modulkasten und eine eigene Steuerung zugeordnet ist. Wird das Zwischengefäss aus der Vorheizstellung in die Giessstellung über den Kokillen oder in eine Füllstellung nahe der Giessstellung gebracht, so wird vor Giessbeginn der Stopfenantriebsmotor mittels elektrischen Steckverbindungen 37 mit dem Steuerschrank 34 verbunden. Nach diesem Anschluss wird die Stopfenbewegung ab Giessbeginn ausschliesslich durch elektrische Signale gesteuert. Für die Fernsteuerung können alle im Stand der Technik bekannten Uebertragungsmittel, wie Draht, Lichtleiter, Funk, Infrarot etc., Anwendung finden.Intermediate vessels for continuous casting plants are provided with up to eight plugs, each plug having its own module box and its own control system. If the intermediate vessel is brought from the preheating position into the casting position via the molds or into a filling position near the casting position, the plug drive motor is connected to the control cabinet 34 by means of electrical plug connections 37 before the casting begins. After this connection, the stopper movement is controlled exclusively by electrical signals from the start of casting. All transmission means known in the prior art, such as wire, light guide, radio, infrared etc., can be used for remote control.

Claims (14)

Vorrichtung zum Regeln eines Metallzuflusses aus einem Giessgefäss in eine Giessform, insbesondere in eine Stranggiesskokille (3) für Stahlstränge, mittels einem Stopfen (5), der mit einer Ausgussdüse (4) zusammenwirkt und in seiner Bewegung nach einem vorbestimmten Programm und/oder mittels einer Badspiegelmesseinrichtung (7) gesteuert wird, dadurch gekennzeichnet, dass eine Führungseinrichtung (10, 12) für den Stopfen zusammen mit ihrem rechnergesteuerten elektromechanischen Antrieb (13)in einem Modulkasten (15) angeordnet sind und der Modulkasten (15) am Giessgefäss (2) mit Spannelementen (16) auswechselbar befestigt, vor Giessbeginn der Stopfenantriebsmotor (13) mittels elektrischen Steckverbindungen (37) mit dem Steuerschrank (34) verbindbar und die Stopfenbewegung ab Giessbeginn ausschliesslich durch den elektrischen Antrieb (13) und elektrische Signale steuerbar ist.Device for regulating a metal inflow from a casting vessel into a casting mold, in particular into a continuous casting mold (3) for steel strands, by means of a stopper (5) which interacts with a pouring nozzle (4) and in its movement according to a predetermined program and / or by means of a Bath level measuring device (7) is controlled, characterized in that a guide device (10, 12) for the stopper, together with its computer-controlled electromechanical drive (13), are arranged in a module box (15) and the module box (15) on the casting vessel (2) Clamping elements (16) are interchangeably fastened, the plug drive motor (13) can be connected to the control cabinet (34) by means of electrical plug connections (37) before the start of casting, and the plug movement from the start of casting can only be controlled by the electrical drive (13) and electrical signals. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Führungseinrichtung für einen heb- und senkbaren Stopfen aus einer Hubstange (10) und einer Führung (12) besteht.Apparatus according to claim 1, characterized in that the guide device for a lifting and lowering plug consists of a lifting rod (10) and a guide (12). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Giessgefäss aus einem Zwischengefäss (2) für eine Mehrstranganlage besteht und mit 2 - 8 Modulkästen (15) ausgerüstet ist.Apparatus according to claim 1 or 2, characterized in that the casting vessel consists of an intermediate vessel (2) for a multi-strand system and is equipped with 2-8 module boxes (15). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Modulkasten (15) staubdicht verschlossen und mit einem Luftüberdruck beaufschlagt ist.Device according to one of claims 1 to 3, characterized in that the module box (15) is closed in a dust-tight manner and is subjected to an excess air pressure. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Luftüberdruck über ein Luftzirkulationssystem (23) aufgebaut ist und die Luft den Modulkasten (15), die Hubstange (10) und einen Stopfentragarm (9) als Kühlmedium durchfliesst.Apparatus according to claim 4, characterized in that the excess air pressure is built up via an air circulation system (23) and the air flows through the module box (15), the lifting rod (10) and a plug support arm (9) as a cooling medium. Vorrichtung nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass zwischen der Wand (19) des Giessgefässes (2) und dem Modulkasten (15) ein offener Luftspalt (20) angeordnet ist.Device according to one of claims 1-5, characterized in that an open air gap (20) is arranged between the wall (19) of the casting vessel (2) and the module box (15). Vorrichtung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass am Modulkasten (15) eine Einrichtung zum Aufhängen (17) am Giessgefäss (2) und Schnellspannelemente (16) für eine starre Befestigung vorgesehen sind.Device according to one of claims 1-6, characterized in that on the module box (15) a device for hanging (17) on the casting vessel (2) and quick release elements (16) are provided for rigid attachment. Vorrichtung nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, dass die Antriebsachse (25) des Motors (13) und die Hubstange (10) zusammen mit ihrer Führung (12) parallel zueinander im Modulkasten (15) angeordnet sind und der Motor (13) die Drehbewegung direkt auf einen Kugelgewindetrieb (27, 28) und von diesem eine Hubbewegung direkt auf die Hubstange (10) überträgt.Device according to one of claims 1-7, characterized in that the drive axis (25) of the motor (13) and the lifting rod (10) together with their guide (12) are arranged parallel to one another in the module box (15) and the motor (13 ) transfers the rotary motion directly to a ball screw drive (27, 28) and from this a lifting motion directly to the lifting rod (10). Vorrichtung nach einem der Ansprüche 1 - 8, dadurch gekennzeichnet, dass ein Handrad (30) an eine Gewindespindel (27) des Kugelgewindetriebes an und abkuppelbar ist.Device according to one of claims 1-8, characterized in that a handwheel (30) can be coupled to and uncoupled from a threaded spindle (27) of the ball screw drive. Vorrichtung nach einem der Ansprüche 1 - 9, dadurch gekennzeichnet, dass in der Stromversorgung (32) ein Signalgeber (33) für eine schnelle Detektion eines Stromausfalles vorgesehen ist.Device according to one of claims 1-9, characterized in that a signal generator (33) is provided in the power supply (32) for rapid detection of a power failure. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass in der elektrischen Antriebsspeisung Kondensatoren angeordnet sind, deren Kapazität für eine programmgesteuerte Notschliessbewegung des Stopfens (5) bei Stromausfall ausreicht.Apparatus according to claim 10, characterized in that capacitors are arranged in the electrical drive supply, the capacitance of which is sufficient for a program-controlled emergency closing movement of the stopper (5) in the event of a power failure. Vorrichtung nach einem der Ansprüche 1 - 11, dadurch gekennzeichnet, dass die Vertikalführung (12) der Hubstange (10) aus einer kugelgelagerten Längsführung besteht und ihre Länge L = 50 - 80 %, vorzugsweise 70 - 80 %, der Zwischengefässhöhe (39) (Boden - Deckelauflage) beträgt.Device according to one of claims 1-11, characterized in that the vertical guide (12) of the lifting rod (10) consists of a ball-bearing longitudinal guide and its length L = 50-80%, preferably 70-80%, of the intermediate vessel height (39) ( Bottom - cover support). Vorrichtung nach einem der Ansprüche 1 - 12, dadurch gekennzeichnet, dass der Ausgussdüse (4) ein Notschieber (36) mit einem Verschlussstein zugeordnet ist.Device according to one of claims 1-12, characterized in that the pouring nozzle (4) is associated with an emergency slide (36) with a locking block. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass der Notschieber mit einer Kolbenzylindereinheit und mit einem Akkumulator für das Betätigungsmedium versehen ist.Device according to claim 13, characterized in that the emergency slide is provided with a piston-cylinder unit and with an accumulator for the actuating medium.
EP96104202A 1995-03-28 1996-03-16 Device for controlling an inflow of metal by means of a stopper Expired - Lifetime EP0734801B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH87095 1995-03-28
CH870/95 1995-03-28
CH00870/95A CH689728A5 (en) 1995-03-28 1995-03-28 Device for regulating an inflow of metal melt by means of a plug.

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EP0734801A1 true EP0734801A1 (en) 1996-10-02
EP0734801B1 EP0734801B1 (en) 1999-07-28
EP0734801B2 EP0734801B2 (en) 2003-02-05

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US (1) US5674426A (en)
EP (1) EP0734801B2 (en)
CA (1) CA2172335C (en)
CH (1) CH689728A5 (en)
DE (1) DE59602511D1 (en)
ES (1) ES2137580T5 (en)

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EP2574414A1 (en) * 2011-09-30 2013-04-03 Siemens VAI Metals Technologies GmbH Electromechanical stopper drive
AT518476A1 (en) * 2016-04-12 2017-10-15 Primetals Technologies Austria GmbH Method for starting and stopping a multi-strand continuous casting machine, common plug drive and multi-strand continuous casting machine
DE19843033B4 (en) * 1998-09-19 2017-11-09 Sms Group Gmbh Breakthrough detection method for a continuous casting mold
EP3782748A1 (en) * 2019-08-20 2021-02-24 Refractory Intellectual Property GmbH & Co. KG Drive device for a stopper in a metallurgical vessel
AT17334U1 (en) * 2020-08-26 2021-12-15 Sheffield Hi Tech Refractories Germany Gmbh Device for closing a casting tube of a metallurgical vessel

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AT518476A1 (en) * 2016-04-12 2017-10-15 Primetals Technologies Austria GmbH Method for starting and stopping a multi-strand continuous casting machine, common plug drive and multi-strand continuous casting machine
AT518476B1 (en) * 2016-04-12 2020-02-15 Primetals Technologies Austria GmbH Process for starting and stopping a multi-strand continuous casting machine, common plug drive and multi-strand continuous casting machine
EP3782748A1 (en) * 2019-08-20 2021-02-24 Refractory Intellectual Property GmbH & Co. KG Drive device for a stopper in a metallurgical vessel
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AT17334U1 (en) * 2020-08-26 2021-12-15 Sheffield Hi Tech Refractories Germany Gmbh Device for closing a casting tube of a metallurgical vessel

Also Published As

Publication number Publication date
ES2137580T5 (en) 2003-08-01
EP0734801B2 (en) 2003-02-05
CA2172335C (en) 2001-06-12
ES2137580T3 (en) 1999-12-16
US5674426A (en) 1997-10-07
EP0734801B1 (en) 1999-07-28
DE59602511D1 (en) 1999-09-02
CH689728A5 (en) 1999-09-30
CA2172335A1 (en) 1996-09-29

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