EP0356552A1 - Process for controlling sliding gate valves, particularly in continuous-casting machines - Google Patents
Process for controlling sliding gate valves, particularly in continuous-casting machines Download PDFInfo
- Publication number
- EP0356552A1 EP0356552A1 EP88114177A EP88114177A EP0356552A1 EP 0356552 A1 EP0356552 A1 EP 0356552A1 EP 88114177 A EP88114177 A EP 88114177A EP 88114177 A EP88114177 A EP 88114177A EP 0356552 A1 EP0356552 A1 EP 0356552A1
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- EP
- European Patent Office
- Prior art keywords
- edge change
- edge
- throttling
- slide
- throttle
- 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.)
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Classifications
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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
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/38—Means for operating the sliding gate
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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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
Definitions
- the invention relates to a method for controlling slide closures, in particular a three-plate slide closure, the slide plate of which, controlled automatically by a processor in a throttle position, regulates the fill level of the melt of a mold and which, when the fill level control is paused, also has an automatically controlled opening stroke in a flow channel the throttle position opposite the slide closure performs an edge change of the standard edge.
- the object of the present invention is to improve the transition to the fill level control with a system-related design of the edge change, or to keep increased bath level fluctuations occurring in the mold at an operational or quality-safe level.
- the object is achieved according to the invention in that at least the throttle position to be picked up by the slide plate after an edge change is instructed by a sequence control of the edge change pre-programmed with the processor of the fill level control or assigned to the processor as a subroutine.
- edge changes can be easily arranged in a normal casting operation with level control or switched on during the casting instead of the level control without having to fear, for example, operational disturbances in the bath level fluctuations in the mold. Rather, an operationally reliable sequence of edge changes is guaranteed in any case, thus creating the basis for the planned use of the edge changes for different casting processes.
- edge changes can be used to flush the flow opening of the slide closure or to optimize the wear of the slide plate or both, so that for each casting operation a specially created control procedure for slide closures with edge change control and level control is possible.
- the invention proceeds in such a way that the sequence control measures one or more throttle positions in front of each edge change and the throttle position to be taken after the edge change is determined therefrom.
- this simple method preferably keeps the bath level fluctuations that occur when alternating use of edge changes in fill level controls within required limits, especially when the throttle position to be taken after an edge change represents an average of at least two previously determined throttle positions.
- the invention recommends that an edge change is initiated and / or ended by a reinforced throttling preprogrammed in the sequence control, which is designed as a stroke extension held over a period of time.
- a reinforced throttling preprogrammed in the sequence control, which is designed as a stroke extension held over a period of time.
- the values of the reinforced throttling should expediently be less than 10 mm for the hub additions and less than 10 seconds for the time periods, it being advantageous to choose values of the throttling reinforced on the input side greater than the values of the throttling reinforced at the end.
- 1 means an intermediate vessel containing metallic melt with a slide closure 3 arranged on the spout 2.
- This has a fixed inlet plate 4, an adjustable slide plate 5 and a stationary outlet plate 6, the flow bores of which form a flow channel 7, the cross section of which is adjusted by adjusting the slide plate 5 can be changed in order to regulate the amount of melt which flows from the vessel 1 through a pouring tube 8 connected to the outlet plate 6 to the mold 9.
- An actuator 10 is used to adjust the slide plate 5, the respective operating position of which is identified by a position meter 11.
- the mold 9 has a fill level 14 set for normal casting operation, monitored by a transmitter 12 (radiator) and a receiver 13. In it, the melt solidifies to form a strand 15, which is drawn off by the drive rollers 16 of a trigger drive 17, the one is associated with a take-off speed meter 18 controller 19 coupled with control technology.
- the trigger speed meter 18 simultaneously sends its data to a control processor 20, which also receives and processes the data from the position meter 11 and the measured value receiver 13.
- the resulting control commands are sent by the processor 20 to the actuator 10 of the slide closure 3 and to the trigger controller 19.
- the withdrawal speed of the strand 15 during normal casting operation is constant, which means that the desired fill level 14 of the mold 9 is regulated solely on the inflow side by means of the slide closure 3.
- the slide plate 5 assumes, for example, a throttle position D1 which, with the throttle edge K1, makes control movements in the opening and closing directions direction allowed to maintain the equilibrium of the amount of melt flowing in per unit of time and the strand 15 emerging from the mold 9.
- edge changes of the slide plate 5, which are particularly evident from FIGS. 3 and 4, are programmed in the processor 20 with the aid of a subroutine. That means from time to time after switching off the program control of the fill level 14 by means of the subroutine instead of the throttle edge K1, the throttle edge K2 is brought into the regulating throttle position D2 and the fill level control is then switched on again.
- the throttle characteristic curve according to FIG. 5 shows such edge changes that can be defined periodically.
- the throttle edge K1 reaches the throttle position D1 defined in the processor when the slide plate 5 is extended with the stroke H1 from the open position A shown in FIG. 5 as a horizontal line (see also FIG. 2).
- This correction is conveyed to the actuator 10 of the slide closure 3 by the processor 20, which receives and stores a value about the current position of the actuator 10 immediately before an edge change after switching off the level control 22, then from the last two values M1, for example and M2 determines an average value M3, which is the control command for the new throttle position D1 to be assumed (FIG. 5).
- the control method of the slide closure 3 just described during an edge change of the slide plate 5 undergoes a training in accordance with FIG. This is done by means of a hub extension HX stored in the processor 20, which acts over the time tx and lowers the bath level in the mold 9 in order to compensate for the additional inflow of melt into the mold 9 that is to be expected during an edge change.
- the method according to FIG. 7 also serves to compensate for the additional quantity of melt which arises as a result of an edge change.
- this also contains a further reinforced throttling HY, ty, but of a smaller format, at the end of each edge change before the release the level control provided.
- the reinforced throttling Hy, ty at the end serves the purpose of a forced level adjustment in order to bring the melt level to the desired fill level 14 as quickly as possible, in whose sections 22 according to FIG. 8 the edge changes 23 with the throttle reinforcements HX, tx, HY, ty according to FIG. 7 are automatically inserted .
- FIG. 5 The number of edge changes and their control variants according to the exemplary embodiments according to FIG. 5, FIG. 6 as well as FIGS. 7 and 8 are to be adapted to the respective slide closures 3 or the casting conditions of a continuous casting installation, whereby it can generally be assumed that more precise control processes (for example FIG. 7) for smaller mold cross sections and 8) apply.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Feedback Control In General (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Steuern von Schieberverschlüssen insbesondere eines Dreiplatten-Schieberverschlusses, dessen Schieberplatte mittels eines Prozessors automatisch gesteuert in einer Drosselstellung den Füllstand der Schmelze einer Kokille regelt und die zudem, bei pausierend geschalteter Füllstandsregelung, mit einem automatisch gesteuerten Oeffnungshub in eine am Durchflusskanal des Schieberverschlusses gegenüberliegende Drosselstellung einen Kantenwechsel der Regelkante vollzieht.The invention relates to a method for controlling slide closures, in particular a three-plate slide closure, the slide plate of which, controlled automatically by a processor in a throttle position, regulates the fill level of the melt of a mold and which, when the fill level control is paused, also has an automatically controlled opening stroke in a flow channel the throttle position opposite the slide closure performs an edge change of the standard edge.
Mit derartigen Kantenwechseln wird im praktischen Giessbetrieb hauptsächlich bei Drehschieberverschlüssen eine Verlagerung der Regelarbeit von einer Kante der Durchflussbohrung der Schieberplatte auf die gegenüberliegende Kante bewirkt und damit ein gleichmässiger Verschleiss des Plattenmaterials erzielt. Dagegen ist für an Stranggiessanlagen eingesetzte Schieberverschlüsse ein Freihalten des Durchflusskanals von Feststoffablagerungen vordringlich. Solches wird gemäss DE.... (PA 3733) mit einem vom Prozessor der Füllstandsregelung unter Abschalten dieser Regelung befohlenen, einen Freispüleffekt erzeugenden Oeffnungshub der Schieberplatte aus der regulierenden Drosselstellung heraus, vorzugsweise in eine gegenüberliegende Drosselstellung erreicht, wobei zusätzlich auch der Vorteil eines gleichmässigen Verschleisses der Schieberplatten-Durchfluss-bohrung gegeben ist.With such edge changes in practical casting operation, mainly with rotary slide closures, the control work is shifted from one edge of the flow bore of the slide plate to the opposite edge and thus uniform wear of the plate material is achieved. In contrast, for slide closures used in continuous casting plants, keeping the flow channel free of solid deposits is a priority. According to DE ... (PA 3733), this is achieved with an opening stroke of the slide plate, which is commanded by the processor of the fill level control and which switches off this control, and which produces a purging effect, preferably out of the regulating throttle position, with an additional advantage of a uniform throttle position Wear of the slide plate flow bore is given.
In der Anwendung von Kantenwechseln ergeben sich besonders bei zum Regeln des Zuflusses von Schmelzen in Stranggiesskokillen eingesetzten Schieberverschlüssen Probleme, einmal durch den beim Kantenwechsel momentan erhöhten Schmelzezufluss, zum anderen, weil die beim Freigeben der Füllstandsregelung von der Schieberplatte eingenommene Drosselstellung in den meisten Fällen nicht dem augenblicklich in der Kokille herrschenden Badspiegelstand gerecht wird.In the application of edge changes, problems arise especially with slide closures used to regulate the inflow of melts in continuous casting molds, on the one hand due to the melt inflow which is currently increased when changing the edges, and on the other hand because the throttle position assumed by the slide plate when the fill level control is released in the most cases does not do justice to the current level of the bath level in the mold.
Folglich treten oftmals beachtliche Badspiegelschwankungen auf, die insbesondere den Uebergang in die während des Kantenwechsels ausgeschaltete Füllstandsregelung erschweren und den Giessbetrieb erheblich stören können.As a result, considerable fluctuations in the level of the bath often occur, which in particular make the transition to the level control switched off during the edge change difficult and can considerably disrupt the casting operation.
Aufgabe vorliegender Erfindung ist es mit einer systemimanenten Gestaltung des Kantenwechsels vornehmlich den Uebergang zur Füllstandsregelung zu verbessern, bzw. dabei in der Kokille vorkommende, erhöhte Badspiegelschwankungen auf einem betriebs- bzw. qualitätssicherem Mass zu halten.The object of the present invention is to improve the transition to the fill level control with a system-related design of the edge change, or to keep increased bath level fluctuations occurring in the mold at an operational or quality-safe level.
Die gestellte Aufgabe wird gemäss der Erfindung dadurch gelöst, dass wenigstens die nach einem Kantenwechsel von der Schieberplatte aufzunehmende Drosselstellung von einer mit dem Prozessor der Füllstandsregelung vorprogrammierten bzw. dem Prozessor als Unterprogramm zugeordneten Ablaufsteuerung des Kantenwechsels angewiesen wird. Auf diese Weise lassen sich Kantenwechsel in einen normalen Giessbetrieb mit Füllstandsregelung problemlos einordnen bzw. während des Giessens anstelle der Füllstandsregelung beliebig zuschalten, ohne beispielsweise betriebsstörende Badspiegelschwankungen in der Kokille befürchten zu müssen. Vielmehr ist in jedem Fall ein betriebssicherer Ablauf des Kantenwechsels gewährleistet und somit die Basis für einen planmässigen Einsatz der Kantenwechsel für unterschiedliche Giessabläufe geschaffen. Je nach herrschenden Giessbedingungen können Kantenwechsel, regel- oder unregelmässig, zum Freispülen der Durchflussöffnung des Schieberverschlusses oder zur Verschleissoptimierung der Schieberplatte oder beidem Verwendung finden, sodass für jeden Giessbetrieb ein speziell erstelltes Steuerverfahren für Schieberverschlüsse mit Kantenwechselsteuerung und Füllstandsregelung möglich ist.The object is achieved according to the invention in that at least the throttle position to be picked up by the slide plate after an edge change is instructed by a sequence control of the edge change pre-programmed with the processor of the fill level control or assigned to the processor as a subroutine. In this way, edge changes can be easily arranged in a normal casting operation with level control or switched on during the casting instead of the level control without having to fear, for example, operational disturbances in the bath level fluctuations in the mold. Rather, an operationally reliable sequence of edge changes is guaranteed in any case, thus creating the basis for the planned use of the edge changes for different casting processes. Depending on the prevailing casting conditions, edge changes, regular or irregular, can be used to flush the flow opening of the slide closure or to optimize the wear of the slide plate or both, so that for each casting operation a specially created control procedure for slide closures with edge change control and level control is possible.
Im einzelnen geht die Erfindung so vor, dass von der Ablaufsteuerung vor jedem Kantenwechsel eine oder mehrere davorliegende Drosselstellungen gemessen werden und daraus die nach dem Kantenwechsel einzunehmende Drosselstellung bestimmt wird.In detail, the invention proceeds in such a way that the sequence control measures one or more throttle positions in front of each edge change and the throttle position to be taken after the edge change is determined therefrom.
Dieses einfache Verfahren hält vorzugsweise bei grossen Kokillenquerschnitten die beim alternierenden Einsatz von Kantenwechseln in Füllstandsregelungen auftretenden Badspiegelschwankungen in erforderlichen Grenzen, besonders dann, wenn die nach einem Kantenwechsel einzunehmende Drosselstellung ein Mittelwert aus wenigstens zwei zuvor ermittelten Drosselstellungen darstellt.With simple mold cross sections, this simple method preferably keeps the bath level fluctuations that occur when alternating use of edge changes in fill level controls within required limits, especially when the throttle position to be taken after an edge change represents an average of at least two previously determined throttle positions.
Für Kokillen mit mittleren oder kleineren Querschnittsgrössen empfiehlt die Erfindung, dass ein Kantenwechsel durch eine in der Ablaufsteuerung vorprogrammierte, verstärkte Drosselung eingeleitet wird und/oder endet, die als über eine Zeitspanne gehaltenen Hubergänzung ausgebildet ist. Dadurch ist eine Niveauabsenkung des Badspiegels sowohl vor als auch nach dem Kantenwechsel erreichbar, um die während eines Kantenwechsels anfallenden zusätzlichen Schmelzenmengen bestmöglichst auszugleichen. Dabei sollten die Werte der verstärkten Drosselungen zweckmässig für die Hubergänzungen weniger als 10 mm und für die Zeitspannen weniger als 10 Sekunden betragen, wobei es vorteilhaft ist Werte der eingangsseitig verstärkten Drosselungen grösser als die Werte der endseitig verstärkten Drosselungen zu wählen.For molds with medium or smaller cross-sectional sizes, the invention recommends that an edge change is initiated and / or ended by a reinforced throttling preprogrammed in the sequence control, which is designed as a stroke extension held over a period of time. As a result, the level of the bath level can be lowered both before and after the edge change in order to optimally compensate for the additional melt quantities that occur during an edge change. The values of the reinforced throttling should expediently be less than 10 mm for the hub additions and less than 10 seconds for the time periods, it being advantageous to choose values of the throttling reinforced on the input side greater than the values of the throttling reinforced at the end.
Nachstehend sind mehrere Ausführungsbeispiele der Erfindung anhand der Zeichnung erläutert. Es zeigen
- Figur 1 in schematischer Darstellung eine mit einem Schieberverschluss ausgerüstete Stranggiessanlage mit prinzipiellem Blockschaltbild der Füllstandsregelung,
Figur 2 die Auf-Position des Schieberverschlusses in grösserem Massstab,Figur 3 und 4 Drosselstellungen des Schieberverschlusses in ähnlichem Massstab wie inFigur 2,Figur 5 bis 7 Steuerkennlinien dreier verschiedener Steuerverfahren des Schieberverschlusses undFigur 8 eine zur Steuerkennlinie nachFigur 6 gehörende Füllstandskennlinie.
- FIG. 1 shows a schematic representation of a continuous casting installation equipped with a slide closure with a basic block diagram of the level control,
- FIG. 2 the open position of the slide closure on a larger scale,
- 3 and 4 throttle positions of the slide closure on a similar scale as in Figure 2,
- Figure 5 to 7 control characteristics of three different control methods of the slide closure and
- FIG. 8 shows a fill level characteristic belonging to the control characteristic according to FIG. 6.
In Figur 1 bedeutet 1 ein metallische Schmelze enthaltendes Zwischengefäss mit einem am Ausguss 2 angeordneten Schieberverschluss 3. Dieser hat eine ortsfeste Einlaufplatte 4, eine verstellbare Schieberplatte 5 und eine wiederum ortsfeste Auslaufplatte 6, deren Durchflussbohrungen einen Durchflusskanal 7 bilden, dessen Querschnitt durch Verstellen der Schieberplatte 5 veränderbar ist, um die Schmelzenmenge zu regeln, die vom Gefäss 1 durch ein an der Auslaufplatte 6 angeschlossenes Giessrohr 8 zur Kokille 9 strömt. Zum Verstellen der Schieberplatte 5 dient ein Stellglied 10, dessen jeweilige Betriebsposition durch einen Stellungsmesser 11 identifiziert wird. Die Kokille 9 hat einen für den normalen Giessbetrieb eingestellten, von einem Sender 12 (Strahler) und einem Empfänger 13 überwachten Füllstand 14. In ihr festigt sich die Schmelze zu einem Strang 15, der von den Treibrollen 16 eines Abzugsantriebes 17 abgezogen wird, dem ein mit einem Abzugsgeschwindigkeitsmesser 18 regeltechnisch gekoppelter Regler 19 zugeordnet ist.In FIG. 1, 1 means an intermediate vessel containing metallic melt with a
Schaltungsgemäss gibt der Abzugsgeschwindigkeitsmesser 18 seine Daten gleichzeitig an einen Regelungsprozessor 20, der zudem die Daten des Stellungsmessers 11 und des Messwertempfängers 13 erhält und bearbeitet. Sich daraus ergebende Steuerbefehle sendet der Prozessor 20 an das Stellglied 10 des Schieberverschlusses 3 und an den Abzugsregler 19.In terms of circuitry, the
Die Abzugsgeschwindigkeit des Stranges 15 bei normalem Giessbetrieb ist konstant, was bedeutet, dass der Sollfüllstand 14 der Kokille 9 allein an der Zuflussseite mittels des Schieberverschlusses 3 geregelt wird. Zu diesem Zweck nimmt die Schieberplatte 5 beispielsweise eine Drosselstellung D1 ein, die mit der Drosselkante K1 Regelbewegungen in Oeffnungs- und Schliess richtung erlaubt, um das Gleichgewicht der pro Zeiteinheit zufliessenden Schmelzenmenge und dem aus der Kokille 9 austretenden Strang 15 einzuhalten.The withdrawal speed of the
Desweiteren sind im Prozessor 20 mit Hilfe eines Unterprogrammes sogenannte, aus Figur 3 und 4 besonders ersichtliche "Kantenwechsel" der Schieberplatte 5 programmiert. Das heisst von Zeit zu Zeit wird nach Abschalten der Programmregelung des Füllstandes 14 mittels des Unterprogrammes anstelle der Drosselkante K1 die Drosselkante K2 in die regulierende Drosselstellung D2 gebracht und anschliessend die Füllstandsregelung wieder eingeschaltet. Die Drosselkennlinie nach Figur 5 zeigt solche Kantenwechsel, die periodisch festgelegt sein können. Zunächst aber erreicht bei Giessbeginn die Drosselkante K1 beim Ausfahren der Schieberplatte 5 mit dem Hub H1 aus der in Figur 5 als horizontal Linie eingezeichneten Auf-Position A (siehe auch Figur 2) die im Prozessor festgelegte Drosselposition D1. Dort schaltet die Regelung des Füllstandes 14, die beiderseits der gleichzeitig als Zeitachse t fungierenden Auf-Position A durch wellenförmige Abschnitte 22 dargestellt ist, automatisch ein. Zwischen den Abschnitten 22 finden die geradlinig eingezeichneten Kantenwechsel 23 statt. Bei jedem der Wechsel 23 (H1 + H2) vollzieht die Schieberplatte 5 einen Oeffnungshub unter voller Freigabe des Durchflusskanals 7, sodass in Folge der sich momentan ändernden Zuflussmenge von Schmelze in die Kokille 9 die neu einzunehmende Drosselstellung, beispielsweise D2, einer Korrektur gegenüber des Ausgangsdrosselstellung, beispielsweise D1, bedarf. Diese Korrektur wird dem Stellglied 10 des Schieberverschlusses 3 durch den Prozessor 20 vermittelt, der unmittelbar vor einem Kantenwechsel nach Abschalten der Füllstandsregelung 22 vom Stellungsmesser 11 einen Wert über die augenblickliche Stellung des Stellglied 10 erhält und speichert, so dann aus den beispielsweise zwei letzten Werten M1 und M2 einen Mittelwert M3 ermittelt, der als Steuerbefehl für die neu einzunehmende Drosselstellung D1 gilt (Figur 5).Furthermore, so-called "edge changes" of the
Das gerade beschriebene Steuerverfahren des Schieberverschlusses 3 während eines Kantenwechsels der Schieberplatte 5 erfährt gemäss Figur 6 eine Durchbildung, in dem vor jedem Kantenwechsel bei abgeschalteter Füllstandsregelung die Drosselung der Schieberplatte 5 kurzfristig verstärkt wird. Dies geschieht mittels einer im Prozessor 20 gespeicherten Hubergänzung HX, die über die Zeit tx wirkt und für eine Absenkung des Badspiegels in der Kokille 9 sorgt, um den während eines Kantenwechsels zu erwartenden zusätzlichen Zufluss von Schmelze in die Kokille 9 zu kompensieren.The control method of the
Der Kompensation des infolge eines Kantenwechsels anfallenden zusätzlichen Quantums an Schmelze dient auch das Verfahren nach Figur 7. Darin ist ausser der verstärkten Drosselung HX, tx eine weitere im Prozessor 20 festgehaltene verstärkte Drosselung HY, ty, jedoch kleineren Formats am Ende jedes Kantenwechsels vor der Freigabe der Füllstandsregelung vorgesehen. Die endseitige verstärkte Drosselung Hy, ty erfüllt den Zweck einer forsierten Niveauangleichung zum schnellstmöglichen Heranführen des Schmelzespiegels an den Sollfüllstand 14, in dessen Abschnitte 22 nach Figur 8 sich die Kantenwechsel 23 mit den Drosselverstärkungen HX, tx, HY, ty nach Figur 7 automatisch gesteuert einfügen.The method according to FIG. 7 also serves to compensate for the additional quantity of melt which arises as a result of an edge change. In addition to the increased throttling HX, tx, this also contains a further reinforced throttling HY, ty, but of a smaller format, at the end of each edge change before the release the level control provided. The reinforced throttling Hy, ty at the end serves the purpose of a forced level adjustment in order to bring the melt level to the desired
Die Anzahl der Kantenwechsel und deren Steuervarianten nach den Ausführungsbeispielen gemäss Figur 5, Figur 6 sowie Figur 7 und 8 sind den jeweiligen Schieberverschlüssen 3 bzw. den Giessverhältnissen einer Stranggiessanlage anzupassen, wobei grundsätzlich davon auszugehen ist, dass für kleinere Kokillenquerschnitte präzisere Steuerungsabläufe (beispielsweise Figur 7 und 8) gelten.The number of edge changes and their control variants according to the exemplary embodiments according to FIG. 5, FIG. 6 as well as FIGS. 7 and 8 are to be adapted to the
Claims (6)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8888114177T DE3869957D1 (en) | 1988-08-31 | 1988-08-31 | METHOD FOR CONTROLLING SLIDING CLOSURES, IN PARTICULAR ON CONTINUOUS CASTING PLANTS. |
ES198888114177T ES2032509T3 (en) | 1988-08-31 | 1988-08-31 | PROCEDURE FOR THE CONTROL OF SLIDING GATE VALVES, ESPECIALLY IN CONTINUOUS CASTING FACILITIES. |
EP88114177A EP0356552B1 (en) | 1988-08-31 | 1988-08-31 | Process for controlling sliding gate valves, particularly in continuous-casting machines |
AT88114177T ATE74544T1 (en) | 1988-08-31 | 1988-08-31 | METHOD FOR CONTROLLING VALVE LOCKS, ESPECIALLY ON CONTINUOUS CASTING PLANTS. |
ZA895236A ZA895236B (en) | 1988-08-31 | 1989-07-10 | Method of controlling sliding gate valves,particularly on continuous casting installations |
CA000607348A CA1310249C (en) | 1988-08-31 | 1989-08-02 | Method of controlling sliding gate valves, particularly on continuous casting installations |
CS19894790A CZ286155B6 (en) | 1988-08-31 | 1989-08-14 | Method of controlling change in throttling position of slide valve obturator |
PL89281130A PL163987B1 (en) | 1988-08-31 | 1989-08-22 | Method of controlling the bolt in particular in metallurgical continuous casting equipment |
JP1215160A JPH0289560A (en) | 1988-08-31 | 1989-08-23 | Method of controlling sliding closing device |
AR89314758A AR244119A1 (en) | 1988-08-31 | 1989-08-25 | A procedure for selectively positioning the sliding plate on a sliding lock, used in continuous casting installations. |
CN89106660A CN1019282B (en) | 1988-08-31 | 1989-08-26 | Method for controlling sate valve, especially suitable to continuous casting device |
US07/399,200 US5048594A (en) | 1988-08-31 | 1989-08-28 | Process for controlling change of throttling position in a sliding closure unit |
MX017349A MX172488B (en) | 1988-08-31 | 1989-08-29 | PROCEDURE TO CONTROL SLIDING LOCKS, ESPECIALLY IN CONTINUOUS CASTING FACILITIES |
SU894614847A SU1739839A3 (en) | 1988-08-31 | 1989-08-30 | Method for control of metal casting |
HU894508A HU207676B (en) | 1988-08-31 | 1989-08-30 | Method for steering sluice valve particularly at rod-casting apparatuses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88114177A EP0356552B1 (en) | 1988-08-31 | 1988-08-31 | Process for controlling sliding gate valves, particularly in continuous-casting machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0356552A1 true EP0356552A1 (en) | 1990-03-07 |
EP0356552B1 EP0356552B1 (en) | 1992-04-08 |
Family
ID=8199247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88114177A Expired - Lifetime EP0356552B1 (en) | 1988-08-31 | 1988-08-31 | Process for controlling sliding gate valves, particularly in continuous-casting machines |
Country Status (15)
Country | Link |
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US (1) | US5048594A (en) |
EP (1) | EP0356552B1 (en) |
JP (1) | JPH0289560A (en) |
CN (1) | CN1019282B (en) |
AR (1) | AR244119A1 (en) |
AT (1) | ATE74544T1 (en) |
CA (1) | CA1310249C (en) |
CZ (1) | CZ286155B6 (en) |
DE (1) | DE3869957D1 (en) |
ES (1) | ES2032509T3 (en) |
HU (1) | HU207676B (en) |
MX (1) | MX172488B (en) |
PL (1) | PL163987B1 (en) |
SU (1) | SU1739839A3 (en) |
ZA (1) | ZA895236B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107127325A (en) * | 2017-05-03 | 2017-09-05 | 陆丽宁 | A kind of end cap casting device |
CN111168029A (en) * | 2020-01-14 | 2020-05-19 | 邢台钢铁有限责任公司 | Control method for automatic casting of large ladle of continuous casting machine |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2311947A (en) * | 1996-03-12 | 1997-10-15 | Flogates Ltd | Sliding gate valve |
MXPA02009077A (en) * | 2000-03-16 | 2003-03-12 | Vesuvius Crucible Co | Sliding gate for liquid metal flow control. |
EP2272605A1 (en) * | 2009-06-24 | 2011-01-12 | Siemens AG | Regulation method for the casting mirror of a continuous casting mould |
EP2564173B1 (en) * | 2010-04-30 | 2019-05-22 | AGELLIS Group AB | Measurements in metallurgical vessels |
CN103084566B (en) * | 2011-11-07 | 2016-08-03 | 上海宝信软件股份有限公司 | Ladle regulator control system |
CA2838446C (en) | 2013-01-04 | 2017-02-21 | Schlagel, Inc. | Gate with variable gate control for handling agricultural granular materials |
US10059513B1 (en) | 2013-01-04 | 2018-08-28 | Schlagel, Inc. | Gate with anti-fouling proximity indicators for handling agricultural granular materials |
CN104759612A (en) * | 2015-04-09 | 2015-07-08 | 马钢(集团)控股有限公司 | Long nozzle inserting type pouring starting device and method |
CN105665675A (en) * | 2016-04-07 | 2016-06-15 | 江苏永钢集团有限公司 | Automatic control and alarming system of molten steel liquid level in crystallizer of continuous casting machine |
CN111250684B (en) * | 2020-02-12 | 2021-08-13 | 上海中天铝线有限公司 | Liquid level control method and device based on rolling mill casting device and storage medium |
CN111250683B (en) * | 2020-02-12 | 2021-07-30 | 上海中天铝线有限公司 | Model-free self-adaptive rolling mill casting liquid level control method and device and storage medium |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3436023A (en) * | 1965-03-09 | 1969-04-01 | Concast Ag | Apparatus for altering the position of a jet of molten metal,especially for continuous casting machines |
DE1910247A1 (en) * | 1969-02-28 | 1970-09-10 | Neitzel Dipl Ing Martin | Device and method for pouring metallurgical melts and similar products |
FR2083566A1 (en) * | 1970-03-25 | 1971-12-17 | Didier Werke Ag | Molten metal reservoir slide seal - withdraw improved resistance - to corrosion |
GB1515922A (en) * | 1975-06-04 | 1978-06-28 | Danieli Off Mecc | Bottom pouring vessel with rotary sliding gate valve for molten metal |
FR2433384A1 (en) * | 1978-08-19 | 1980-03-14 | Stopinc Ag | THREE-PLATE DRAWER CLOSURE DEVICE |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4077457A (en) * | 1974-03-06 | 1978-03-07 | Sumitomo Metal Industries Limited | Molten metal pouring control method and apparatus for use in continuous casting equipment |
JPS53129125A (en) * | 1977-04-19 | 1978-11-10 | Mitsubishi Heavy Ind Ltd | Ladle value control apparatus in continuous casting |
DE7737254U1 (en) * | 1977-12-07 | 1978-05-18 | Zimmermann & Jansen Gmbh, 5160 Dueren | POUR SLIDER |
CH653269A5 (en) * | 1981-06-01 | 1985-12-31 | Metacon Ag | METHOD FOR PREVENTING THE FREEZING OF METAL MELT IN THE OUTLET CHANNEL OF A CASTING VESSEL. |
JPS603952A (en) * | 1983-06-20 | 1985-01-10 | Sumitomo Metal Ind Ltd | Pouring method of molten metal |
US4597048A (en) * | 1983-09-07 | 1986-06-24 | United States Steel Corporation | Digital flow regulation of liquid-level control for a continuous casting mold |
DE3422901A1 (en) * | 1984-06-20 | 1986-01-02 | Metacon AG, Zürich | METHOD FOR POURING A METAL MELT |
US4730660A (en) * | 1984-09-05 | 1988-03-15 | Metacon Aktiengesellschaft | Process for casting molten metal into several strands |
US4625787A (en) * | 1985-01-22 | 1986-12-02 | National Steel Corporation | Method and apparatus for controlling the level of liquid metal in a continuous casting mold |
JPS61212460A (en) * | 1985-03-19 | 1986-09-20 | Sumitomo Metal Ind Ltd | Device for preventing clogging of molten steel pouring passage of continuous casting installation |
DE3509932A1 (en) * | 1985-03-19 | 1986-10-02 | Metacon AG, Zürich | METHOD FOR STARTING UP A CONTINUOUS CASTING SYSTEM |
DE3742215A1 (en) * | 1987-12-12 | 1989-06-22 | Metacon Ag | METHOD FOR KEEPING THE FLOW CHANNEL FROM SLIDING CLOSURES ON CONTINUOUS CASTING SYSTEMS |
-
1988
- 1988-08-31 DE DE8888114177T patent/DE3869957D1/en not_active Expired - Lifetime
- 1988-08-31 AT AT88114177T patent/ATE74544T1/en not_active IP Right Cessation
- 1988-08-31 EP EP88114177A patent/EP0356552B1/en not_active Expired - Lifetime
- 1988-08-31 ES ES198888114177T patent/ES2032509T3/en not_active Expired - Lifetime
-
1989
- 1989-07-10 ZA ZA895236A patent/ZA895236B/en unknown
- 1989-08-02 CA CA000607348A patent/CA1310249C/en not_active Expired - Lifetime
- 1989-08-14 CZ CS19894790A patent/CZ286155B6/en not_active IP Right Cessation
- 1989-08-22 PL PL89281130A patent/PL163987B1/en unknown
- 1989-08-23 JP JP1215160A patent/JPH0289560A/en active Pending
- 1989-08-25 AR AR89314758A patent/AR244119A1/en active
- 1989-08-26 CN CN89106660A patent/CN1019282B/en not_active Expired
- 1989-08-28 US US07/399,200 patent/US5048594A/en not_active Expired - Fee Related
- 1989-08-29 MX MX017349A patent/MX172488B/en unknown
- 1989-08-30 SU SU894614847A patent/SU1739839A3/en active
- 1989-08-30 HU HU894508A patent/HU207676B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3436023A (en) * | 1965-03-09 | 1969-04-01 | Concast Ag | Apparatus for altering the position of a jet of molten metal,especially for continuous casting machines |
DE1910247A1 (en) * | 1969-02-28 | 1970-09-10 | Neitzel Dipl Ing Martin | Device and method for pouring metallurgical melts and similar products |
FR2083566A1 (en) * | 1970-03-25 | 1971-12-17 | Didier Werke Ag | Molten metal reservoir slide seal - withdraw improved resistance - to corrosion |
GB1515922A (en) * | 1975-06-04 | 1978-06-28 | Danieli Off Mecc | Bottom pouring vessel with rotary sliding gate valve for molten metal |
FR2433384A1 (en) * | 1978-08-19 | 1980-03-14 | Stopinc Ag | THREE-PLATE DRAWER CLOSURE DEVICE |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107127325A (en) * | 2017-05-03 | 2017-09-05 | 陆丽宁 | A kind of end cap casting device |
CN111168029A (en) * | 2020-01-14 | 2020-05-19 | 邢台钢铁有限责任公司 | Control method for automatic casting of large ladle of continuous casting machine |
CN111168029B (en) * | 2020-01-14 | 2022-04-05 | 邢台钢铁有限责任公司 | Control method for automatic casting of large ladle of continuous casting machine |
Also Published As
Publication number | Publication date |
---|---|
HU207676B (en) | 1993-05-28 |
CS479089A3 (en) | 1991-10-15 |
ES2032509T3 (en) | 1993-02-16 |
US5048594A (en) | 1991-09-17 |
CZ286155B6 (en) | 2000-01-12 |
SU1739839A3 (en) | 1992-06-07 |
CN1040528A (en) | 1990-03-21 |
AR244119A1 (en) | 1993-10-29 |
JPH0289560A (en) | 1990-03-29 |
PL163987B1 (en) | 1994-06-30 |
MX172488B (en) | 1993-12-17 |
ZA895236B (en) | 1990-04-25 |
HUT54574A (en) | 1991-03-28 |
CA1310249C (en) | 1992-11-17 |
CN1019282B (en) | 1992-12-02 |
ATE74544T1 (en) | 1992-04-15 |
EP0356552B1 (en) | 1992-04-08 |
DE3869957D1 (en) | 1992-05-14 |
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