EP0356551B1 - Set of ceramic plates for sliding gate valves comprising three sliding plates - Google Patents

Set of ceramic plates for sliding gate valves comprising three sliding plates Download PDF

Info

Publication number
EP0356551B1
EP0356551B1 EP88114176A EP88114176A EP0356551B1 EP 0356551 B1 EP0356551 B1 EP 0356551B1 EP 88114176 A EP88114176 A EP 88114176A EP 88114176 A EP88114176 A EP 88114176A EP 0356551 B1 EP0356551 B1 EP 0356551B1
Authority
EP
European Patent Office
Prior art keywords
plate
flow
plates
outlet
sliding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88114176A
Other languages
German (de)
French (fr)
Other versions
EP0356551A1 (en
Inventor
Berhard Dipl.-Ing. Dipl.-Kfm. Tinnes
Walter Masch.Ing.Htl Vetterli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metacon AG
Original Assignee
Metacon AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metacon AG filed Critical Metacon AG
Priority to ES198888114176T priority Critical patent/ES2031561T3/en
Priority to DE8888114176T priority patent/DE3869609D1/en
Priority to AT88114176T priority patent/ATE74036T1/en
Priority to EP88114176A priority patent/EP0356551B1/en
Priority to ZA895235A priority patent/ZA895235B/en
Priority to CA000607347A priority patent/CA1340540C/en
Priority to CS478989A priority patent/CS273200B2/en
Priority to JP1215159A priority patent/JPH0289559A/en
Priority to AR89314757A priority patent/AR241644A1/en
Priority to MX017330A priority patent/MX171518B/en
Priority to US07/400,056 priority patent/US4966315A/en
Priority to CN89106645A priority patent/CN1018805B/en
Priority to SU894614846A priority patent/SU1731039A3/en
Priority to HU450689A priority patent/HU209419B/en
Publication of EP0356551A1 publication Critical patent/EP0356551A1/en
Application granted granted Critical
Publication of EP0356551B1 publication Critical patent/EP0356551B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—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
    • B22D41/24—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 characterised by a rectilinearly movable plate

Definitions

  • the invention relates to a refractory plate set for three-plate slide closures, in particular for regulating the inflow of molten steel in continuous casting molds, with a melt flow channel formed by the flow openings of the plates, the flow cross section of which can be changed by adjusting a slide plate, which is between a stationary inlet plate and a likewise stationary, a refractory one Spout, for example in the form of a pouring tube or an outlet sleeve, supports a supporting outlet plate, the flow bore of which has a conical expansion area at least on the inlet side and enables the melt to flow completely out of the flow bore of the slide plate during the closing process.
  • slide shutters equipped with a set of three refractory plates serve primarily to regulate the amount of melt to be fed from a tundish to a continuous casting mold.
  • the starting point of the control range is a throttle position in which the slide plate blocks the flow channel of the plate set to such an extent that regulation is possible both in the closing and in the opening direction of the slide plate.
  • the throttle position at the start of pouring with the flow channel fully open may be an exception to the throttle position at the start of pouring with the flow channel fully open, except for the usual one Flow holes of the inlet and outlet plates are congruently fixed, the flow hole of the slide plate is also congruent.
  • the throttle edge of the slide plate protrudes far between the flow bores of the inlet and outlet plate and causes a sharp deflection of the melt flow or pouring jet in the flow channel of the closure with a curve bulging in the closing direction.
  • the result of such a sharp flow curve is increased flow pressures, especially below the slide plate on the edge of the bore in the flow path of the outlet plate and in the region of the outlet below it.
  • deposits from the melt occur primarily at the bore edge of the outlet plate lying in the flow path as a result of flow eddies, which increasingly narrow the flow channel.
  • a discharge plate with an elongated hole the cross section of which is larger than the cross section of the flow holes of the other plates, largely weakened mainly in their flexural strength.
  • the flow opening is also designed as a flow bore, but in the open position except for an inlet-side conical expansion congruent with the flow openings of the other two plates.
  • the object of the present invention is to achieve an improved flow of the melt in the throttling position of the three-plate set with simple technical means with a comparatively long service life of the plates.
  • the simple technical means according to the invention are that the axis of the flow bore of the outlet plate is offset in comparison with the diameter of the flow bore of the slide plate with the same or smaller diameter relative to the axis of the flow bore of the inlet plate in the closing direction of the slide plate.
  • the invention can be carried out in such a way that two extension regions are provided on the bore edges of the outlet plate opposite one another in the direction of displacement, or there is a single conical extension region which then lies in the opening direction of the slide plate. Both versions are easy to accomplish, for example, by slanting an extension drill on the edge of the hole and result in favorable strength ratios of the outlet plates.
  • the ring width of the conical extension regions preferably corresponds at least to the degree of the axis offset.
  • the flow hole of the outlet plate can preferably be kept smaller than the diameter of the flow hole in the inlet plate by at most twice the amount of the axis offset.
  • a conventional plate set according to FIG. 1 for a three-plate slide closure has a stationary inlet plate 1 with a through-bore 4, an adjustable slide plate 2 with a through-hole 5 and a stationary outlet plate 3 with a through-hole 6, to which a refractory outlet pipe 7 is connected.
  • All flow bores 4 to 6 have the same diameter and are congruent in the open position. They form a flow channel 4 to 6 for molten steel, which flows from a vessel (not shown) to the closure and flows through the outlet pipe 7 (immersion pipe) into a mold (also not shown) in a controlled manner.
  • the cross-section of the flow channel 4 to 6 can be changed and take any conceivable throttle position between a full open position and a full closed position, for example to keep the fill level in a continuous casting mold at a desired set level.
  • the approximately half throttle position shown in FIG. 1 is the normal pouring position, which has approximately the same control reserves in the opening and closing directions.
  • melt flow in the flow channel 4 to 6 is sharply deflected at the projecting throttle edge 9 of the slide plate 2.
  • the flow or Deflection pressure of the melt stream or pouring jet with vortex formation mainly affects the opening edge 10 of the outlet plate 3 lying in the closing direction and the region 11 of the outlet pipe 7 underneath, which leads to premature wear with an adverse effect on the service life of outlet plate 3 and outlet pipe 7 .
  • the extension of the outlet plate 3 can consist of extension areas 15 which face each other in the direction of displacement of the slide plate 2 at the flow-through hole 16, the diameter of which is kept smaller than the same diameter of the holes 4 and 5 in order to consolidate the pouring jet .
  • the melt can flow through the flow channels 4, 5 and 16 almost without deflection.
  • a single extension area 17 on the flow-through bore 18 of the outlet plate 3, namely in the open position of the slide plate 2 can be used, in which case it must be ensured that in FIG 9 illustrated throttle position, the edge projection 19 of the outlet plate is as small as possible.
  • the plate set described for continuous casting plants is also equally effective for casting work in which an outlet sleeve is connected to the outlet plate 3 instead of an outlet pipe 7 (immersion pipe).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Sliding Valves (AREA)

Description

Die Erfindung betrifft einen feuerfesten Plattensatz für Dreiplattenschieberverschlüsse, insbesondere zum Regeln des Zuflusses von Stahlschmelze in Stranggießkokillen, mit einem von den Durchflußöffnungen der Platten gebildeten Schmelzedurchflußkanal, dessen Durchflußquerschnitt durch Verstellen einer Schieberplatte veränderbar ist, die zwischen einer ortsfesten Einlaufplatte und einer ebenfalls ortsfesten, einen feuerfesten Auslauf, beispielsweise in Form eines Gießrohres oder einer Auslaufhülse, tragenden Auslaufplatte lagert, deren Durchflußbohrung wenigstens einlaufseitig einen konischen Erweiterungsbereich aufweist und ein vollständiges Ablaufen der Schmelze aus der Durchflußbohrung der Schieberplatte während des Schließvorganges ermöglicht.The invention relates to a refractory plate set for three-plate slide closures, in particular for regulating the inflow of molten steel in continuous casting molds, with a melt flow channel formed by the flow openings of the plates, the flow cross section of which can be changed by adjusting a slide plate, which is between a stationary inlet plate and a likewise stationary, a refractory one Spout, for example in the form of a pouring tube or an outlet sleeve, supports a supporting outlet plate, the flow bore of which has a conical expansion area at least on the inlet side and enables the melt to flow completely out of the flow bore of the slide plate during the closing process.

Mit einem Satz von drei feuerfesten Platten ausgestattete Schieberverschlüsse dienen bekanntlich vornehmlich zur Regelung der aus einem Zwischengefäß (Tundish) einer Stranggießkokille zuzuführenden Schmelzenmenge. Im Gießbetrieb ist Ausgangspunkt des Regelbereiches eine Drosselstellung, bei der die Schieberplatte den Durchflußkanal des Plattensatzes so weit absperrt, daß eine Regelung sowohl in Schließ- als auch in Öffnungsrichtung der Schieberplatte möglich ist. Eine Ausnahme zur Drosselstellung gibt es gegebenenfalls bei Gießbeginn mit voll offenem Durchflußkanal, wobei außer den üblicher-weise deckungsgleich fixierten Durchflußbohrungen von Einlauf- und Auslaufplatte die Durchflußbohrung der Schieberplatte zusätzlich deckungsgleich ist. Ansonsten steht die Drosselkante der Schieberplatte zwischen den Durchflußbohrungen von Ein- und Auslaufplatte weit vor und verursacht eine scharfe Umlenkung des Schmelzstromes bzw. Gießstrahls im Durchflußkanal des Verschlusses mit einer in Schließrichtung ausgebuchteten Kurve. Die Folgen einer solchen scharfen Strömungskurve sind erhöhte Strömungsdrücke, besonders unterhalb der Schieberplatte an der im Strömungsweg liegenden Bohrungskante der Auslaufplatte und im darunter liegenden Bereich des Auslaufes. Dort sind ausnehmend hohe thermische und erosive Beanspruchungen des feuerfesten Materials vorhanden, welche dadurch einem unerwünscht hohen, voreilenden Verschleiß ausgesetzt ist, der zu einem frühzeitigen Austausch der besagten Teile zwingt. Außerdem treten vornehmlich an der im Strömungsweg liegenden Bohrungskante der Auslaufplatte infolge von Strömungswirbeln Ablagerungen aus der Schmelze auf, die den Durchflußkanal zunehmend verengen.It is known that slide shutters equipped with a set of three refractory plates serve primarily to regulate the amount of melt to be fed from a tundish to a continuous casting mold. In the casting operation, the starting point of the control range is a throttle position in which the slide plate blocks the flow channel of the plate set to such an extent that regulation is possible both in the closing and in the opening direction of the slide plate. There may be an exception to the throttle position at the start of pouring with the flow channel fully open, except for the usual one Flow holes of the inlet and outlet plates are congruently fixed, the flow hole of the slide plate is also congruent. Otherwise, the throttle edge of the slide plate protrudes far between the flow bores of the inlet and outlet plate and causes a sharp deflection of the melt flow or pouring jet in the flow channel of the closure with a curve bulging in the closing direction. The result of such a sharp flow curve is increased flow pressures, especially below the slide plate on the edge of the bore in the flow path of the outlet plate and in the region of the outlet below it. There are exceptional high thermal and erosive stresses on the refractory material, which is thereby exposed to an undesirably high, premature wear, which forces an early replacement of the said parts. In addition, deposits from the melt occur primarily at the bore edge of the outlet plate lying in the flow path as a result of flow eddies, which increasingly narrow the flow channel.

Zum Stand der Technik ist der Dreiplattenschieberverschluß nach der DE-A-2 836 434 anzuführen, in der zwar nicht die Strömungsverhältnisse innerhalb des Durchflußkanals untersucht sind, aber in Fig. 1 eine Ausbildung der Durchflußöffnung in der ortsfesten Auslaufplatte als sich in Schließrichtung erstreckendes Langloch vorgeschlagen ist, um einen vollständigen Ablauf der Schmelze aus der Durchflußöffnung der Schieberplatte beim Schließvorgang zu gewährleisten. Langlöcher lassen sich jedoch insbesondere an feuerfesten Platten nur schwierig und aufwendig bewerkstelligen, vor allem, wenn das Langloch mit einem Auslaufquerschnitt auszustatten ist, der dem Einlaufquerschnitt eines anschließbaren Gießrohres entsprechen soll. Außerdem wird eine Auslaufplatte mit Langloch, deren Querschnitt größe ist als der Querschnitt der Durchflußbohrungen der übrigen Platten vorwiegend in ihrer Biegefestigkeit erheblich geschwächt. Bei dem in Fig. 3 dargestellten Dreiplattenschieberverschluß ist zwar die Durchflußöffnung auch als Durchflußbohrung ausgebildet, jedoch in Öffnungsstellung bis auf eine einlaufseitige konische Erweiterung deckungsgleich mit den Durchflußöffnungen der beiden anderen Platten. Hierbei bestehen die gleichen Verschleißprobleme wie oben bereits geschildert.In relation to the prior art, the three-plate slide closure according to DE-A-2 836 434 is to be cited, in which the flow conditions within the flow channel have not been investigated, but in Fig. 1 an embodiment of the flow opening in the stationary outlet plate is proposed as an elongated hole extending in the closing direction is to ensure a complete drain of the melt from the flow opening of the slide plate during the closing process. Elongated holes, however, are difficult and expensive to produce, in particular on refractory plates, especially if the elongated hole is to be provided with an outlet cross section which should correspond to the inlet cross section of a connectable pouring tube. In addition, a discharge plate with an elongated hole, the cross section of which is larger than the cross section of the flow holes of the other plates, largely weakened mainly in their flexural strength. In the three-plate slide closure shown in Fig. 3, the flow opening is also designed as a flow bore, but in the open position except for an inlet-side conical expansion congruent with the flow openings of the other two plates. Here there are the same wear problems as described above.

Aufgabe der vorliegenden Erfindung ist es, einen verbesserten Strömungsfluß der Schmelze in Drosselstellung des Dreiplattensatzes mit einfachen technischen Mitteln bei vergleichsweise hohen Standzeiten der Platten zu erreichen.The object of the present invention is to achieve an improved flow of the melt in the throttling position of the three-plate set with simple technical means with a comparatively long service life of the plates.

Die einfachen technischen Mittel bestehen gemäß der Erfindung darin, daß die Achse der Durchflußbohrung der Auslaufplatte bei im Vergleich zu dem Durchmesser der Durchflußbohrung der Schieberplatte gleichem oder kleinerem Durchmesser gegenüber der Achse der Durchflußbohrung der Einlaufplatte in Schließrichtung der Schieberplatte versetzt ist. Diese Vorschläge können an herkömmlichen Plattenausführungen herstellungsmäßig problemlos verwirklicht werden, bei unbeeinträchtigt bleibender Festigkeit der Platten, beispielsweise gegenüber während des Betriebes auftretenden Biegespannungen. Darüber hinaus werden in einfacher Weise die Voraussetzungen für einen verschleißmindernden Fluß des Schmelzestromes im Schmelzedurchflußkanal geschaffen, den die Schmelze in Drosselstellung der Schieberplatte vergleichsweise ungehindert durchströmt. So wird mit relativ geringem baulichen Aufwand ein hohe Nutzeffekt erzielt, besonders an Auslaufplatte und Auslauf, deren beider Lebensdauer sich deutlich steigert und die auch weitgehend freibleiben von Ablagerungsprodukten aus der Schmelze.The simple technical means according to the invention are that the axis of the flow bore of the outlet plate is offset in comparison with the diameter of the flow bore of the slide plate with the same or smaller diameter relative to the axis of the flow bore of the inlet plate in the closing direction of the slide plate. These proposals can be easily realized in terms of production on conventional plate designs, with the strength of the plates remaining unaffected, for example during the period Operating bending stresses. In addition, the prerequisites for a wear-reducing flow of the melt flow in the melt flow channel are created in a simple manner, through which the melt flows comparatively unhindered in the throttle position of the slide plate. In this way, a high efficiency is achieved with relatively little structural effort, especially on the outlet plate and outlet, the lifespan of both of which increases significantly and also largely free of deposit products from the melt.

Im einzelnen hat sich bei verschiedenen Durchflußbohrungs-Querschnitten als zweckmäßig erwiesen, als Maß für die Achsenversetzung 10 bis 50 % des Durchmessers der Durchflußbohrung festzulegen.In particular, it has proven to be expedient for various flow bore cross sections to define 10 to 50% of the diameter of the flow bore as a measure for the axis offset.

Hinsichtlich der Ausbildung der konischen Erweiterung kann erfindungsgemäß so vorgegangen werden, daß zwei Erweiterungsbereiche an den in Verschieberichtung einander gegenüberliegenden Bohrungskanten der Auslaufplatte vorgesehen sind oder es ist ein einziger konischer Erweiterungsbereich vorhanden, der dann in Öffnungsrichtung der Schieberplatte liegt. Beide Ausführungen sind beispielsweise durch schräges Ansetzen eines Erweiterungsbohrers an den Bohrungskanten leicht zu bewerkstelligen und bewirken günstige Festigkeitsverhältnisse der Auslaufplatten. Vorzugsweise entspricht die Ringbreite der konischen Erweiterungsbereiche wenigstens dem Maß der Achsenversetzung. Die Durchflußbohrung der Auslaufplatte kann bevorzugt höchstens um das doppelte Maß der Achsenversetzung kleiner gehalten sein als der Durchmesser der Durchflußbohrung in der Einlaufplatte.With regard to the design of the conical extension, the invention can be carried out in such a way that two extension regions are provided on the bore edges of the outlet plate opposite one another in the direction of displacement, or there is a single conical extension region which then lies in the opening direction of the slide plate. Both versions are easy to accomplish, for example, by slanting an extension drill on the edge of the hole and result in favorable strength ratios of the outlet plates. The ring width of the conical extension regions preferably corresponds at least to the degree of the axis offset. The flow hole of the outlet plate can preferably be kept smaller than the diameter of the flow hole in the inlet plate by at most twice the amount of the axis offset.

Die Erfindung ist nachstehend anhand der schematischen Zeichnung erläutert.

Fig. 1
zeigt im ausschnittsweisen Längsschnitt einen bekannten Plattensatz in Drosselstellung,
Fig. 2
einen Längsschnitt durch einen erfindungsgemäßen Plattensatz in Offenstellung,
Figur 3
eine Draufsicht auf die Auslaufplatte des Plattensatzes gemäss Figur 2 und
Figur 4 bis 6 und 7 bis 9
Varianten der Erfindung in ähnlicher Darstellungsweise wie in Figur 2 und 3.
The invention is explained below with reference to the schematic drawing.
Fig. 1
shows a detail of a known plate set in the throttle position,
Fig. 2
2 shows a longitudinal section through a plate set according to the invention in the open position,
Figure 3
a plan view of the outlet plate of the plate set according to Figure 2 and
Figure 4 to 6 and 7 to 9
Variants of the invention in a representation similar to that in FIGS. 2 and 3.

Ein herkömmlicher Plattensatz nach Figur 1 für einen Dreiplattenschieberverschluss hat eine ortsfeste Einlaufplatte 1 mit Durchflussbohrung 4, eine verstellbare Schieberplatte 2 mit Durchflussbohrung 5 und eine ortsfeste Auslaufplatte 3 mit Durchflussbohrung 6, an die ein feuerfestes Auslaufrohr 7 angeschlossen ist. Alle Durchflussbohrungen 4 bis 6 haben gleichen Durchmesser und fluchten deckungsgleich in der Offenstellung. Sie bilden einen Durchflusskanal 4 bis 6 für Stahlschmelze, die aus einem nicht dargestellten Gefäss dem Verschluss zu - und durch das Auslaufrohr 7 (Tauchrohr) in eine ebenfalls nicht dargestellte Kokille geregelt abfliesst. Durch verstellen der Schieberplatte 2 in Schliessrichtung 8 und zurück kann der Querschnitt des Durchflusskanals 4 bis 6 verändert werden und dabei zwischen einer vollen Offenstellung und einer vollen Schliesstellung jede denkbare Drosselstellung einnehmen, um beispielsweise den Füllstand in einer Stranggiesskokille auf einem gewünschten Sollfüllstand zu halten. Dabei ist die in Figur 1 gezeigte, etwa hälftige Drosselstellung die normale Giessstellung, die etwa gleiche Regelreserven in Oeffnungs- und Schliessrichtung hat.A conventional plate set according to FIG. 1 for a three-plate slide closure has a stationary inlet plate 1 with a through-bore 4, an adjustable slide plate 2 with a through-hole 5 and a stationary outlet plate 3 with a through-hole 6, to which a refractory outlet pipe 7 is connected. All flow bores 4 to 6 have the same diameter and are congruent in the open position. They form a flow channel 4 to 6 for molten steel, which flows from a vessel (not shown) to the closure and flows through the outlet pipe 7 (immersion pipe) into a mold (also not shown) in a controlled manner. By adjusting the slide plate 2 in the closing direction 8 and back, the cross-section of the flow channel 4 to 6 can be changed and take any conceivable throttle position between a full open position and a full closed position, for example to keep the fill level in a continuous casting mold at a desired set level. The approximately half throttle position shown in FIG. 1 is the normal pouring position, which has approximately the same control reserves in the opening and closing directions.

In einer solchen Drosselstellung wird der Schmelzestrom im Durchflusskanal 4 bis 6 an der vorstehenden Drosselkante 9 der Schieberplatte 2 scharf umgelenkt. Dabei wirkt der Strömungs-bzw. Umlenkungsdruck des Schmelzestroms bzw. Giessstrahls unter Wirbelbildung hauptsächlich auf die in Schliessrichtung liegende Oeffnungskante 10 der Auslaufplatte 3 und den darunter liegenden Bereich 11 des Auslaufrohres 7 ein, was einen voreilenden Verschleiss mit nachteiliger Auswirkung auf die Standzeit von Auslaufplatte 3 und des Auslaufrohres 7 mit sich bringt.In such a throttle position, the melt flow in the flow channel 4 to 6 is sharply deflected at the projecting throttle edge 9 of the slide plate 2. The flow or Deflection pressure of the melt stream or pouring jet with vortex formation mainly affects the opening edge 10 of the outlet plate 3 lying in the closing direction and the region 11 of the outlet pipe 7 underneath, which leads to premature wear with an adverse effect on the service life of outlet plate 3 and outlet pipe 7 .

Dem wird durch die erfindungsgemässe Ausführung nach Figur 2 und 3 entgegengewirkt, wo die Durchflussbohrung 12 der ortsfesten Auslaufplatte 3 nicht deckungsgleich zur Durchflussbohrung 4 der ortsfesten Einlaufplatte 1 angeordnet, sondern um ein Mass X in Schliessrichtung 8 der Schieberplatte 2 versetzt ist. Dadurch ergibt sich, in der in Figur 2 gestrichelt eingezeichneten Drosselstellung der Schieberplatte 2 eine weitgehend direkte Einführung des Schmelzenstromes in das Auslaufrohr 7 unter Vermeidung eines voreilenden Verschleisses an den besagten Stellen 10 und 11. Zusätzlich bleibt der Durchflusskanal 4, 5 und 12 während des Giessens weitgehend von Zuschmierungen und Verstopfungen verursachenden Ablagerungen frei, zumal während des Einfahrens der Schieberplatte 2 in die Strichpunktiert angedeutete Schliessstellung 13, deren Bohrung 5 völlig leerlaufen kann. Gleichermassen dienlich wirkt die konische Erweiterung 14, die an der Einlaufseite der Durchflussbohrung 12 der Auslaufplatte 3 vorgesehen und zweckmässig als Lochversenkung ausgebildet ist, aber auch eine langgestrekte Konusform haben kann.This is counteracted by the embodiment according to the invention according to FIGS. 2 and 3, where the throughflow bore 12 of the stationary outlet plate 3 is not arranged congruently with the throughflow bore 4 of the stationary inlet plate 1, but is offset by a dimension X in the closing direction 8 of the slide plate 2. As a result, in the throttle position of the slide plate 2 shown in dashed lines in FIG. 2, a largely direct introduction of the melt stream into the outlet pipe 7 is avoided, avoiding premature wear at said points 10 and 11. In addition, the flow channel 4, 5 and 12 remains during the casting largely free of deposits and blockages, especially as the slide plate 2 is retracted into the closed position 13 indicated by the dash-dotted lines, the bore 5 of which can run completely empty. Equally useful is the conical widening 14, which is provided on the inlet side of the flow bore 12 of the outlet plate 3 and is expediently designed as a countersink, but can also have an elongated conical shape.

Dementsprechend kann nach Figur 4 bis 6 die Erweiterung der Auslaufplatte 3 aus Erweiterungsbereichen 15 bestehen, die sich in Verschieberichtung der Schieberplatte 2 an der Durchflussbohrung 16 gegenüberstehen, deren Durchmesser kleiner gehalten ist als die gleichen Durchmesser der Bohrungen 4 und 5, um den Giessstrahl zu festigen. Auch dabei kann, wie die Drosselstellung nach Figur 6 zeigt, die Schmelze nahezu umlenkungsfrei den Durchflusskanal 4, 5 und 16 durchfliessen. Im weiteren lässt sich in manchen Fällen beispielsweise nach Figur 7 bis 9, mit einem einzigen Erweiterungsbereich 17 an der Durchflussbohrung 18 der Auslaufplatte 3, und zwar in Offenstellungsrichtung der Schieberplatte 2 liegend, auskommen, wobei dann darauf zu achten ist, dass in der in Figur 9 veranschaulichten Drosselstellung, der Kantenvorsprung 19 der Auslaufplatte, so klein als möglich ausfällt.Accordingly, according to FIGS. 4 to 6, the extension of the outlet plate 3 can consist of extension areas 15 which face each other in the direction of displacement of the slide plate 2 at the flow-through hole 16, the diameter of which is kept smaller than the same diameter of the holes 4 and 5 in order to consolidate the pouring jet . Here too, as the throttle position according to FIG. 6 shows, the melt can flow through the flow channels 4, 5 and 16 almost without deflection. Furthermore, in some cases, for example according to FIGS. 7 to 9, a single extension area 17 on the flow-through bore 18 of the outlet plate 3, namely in the open position of the slide plate 2, can be used, in which case it must be ensured that in FIG 9 illustrated throttle position, the edge projection 19 of the outlet plate is as small as possible.

Ebenso wirksam ist der für Stranggiessanlagen beschriebene Plattensatz auch für Giessarbeiten geeignet, bei denen anstatt eines Auslaufrohres 7 (Tauchrohres) eine Auslaufhülse an die Auslaufplatte 3 angeschlossen ist.The plate set described for continuous casting plants is also equally effective for casting work in which an outlet sleeve is connected to the outlet plate 3 instead of an outlet pipe 7 (immersion pipe).

Claims (6)

  1. Set of refractory plates for three-plate sliding gate valves, particularly for controlling the supply of steel melt into continuous casting moulds, with a melt flow passage which is defined by the flow openings (4,5,12,16,18) in the plates (1,2,3) and whose flow cross-section may be altered by moving a sliding plate (2) which is mounted between a fixed inlet plate (1) and an outlet plate (3) which is also fixed and carries a refractory outlet and whose flow opening (5) has a conical broadened region (14,15,17) at least at its inlet side and permits the melt to flow completely out of the flow opening (5) in the sliding plate (2) during the closing process, characterised in that the axis of the flow opening (12,16,18) in the outlet plate (3), with a diameter which is the same or smaller in comparison to the diameter of the flow opening (5) in the sliding plate (2), is offset (X) with respect to the axis of the flow opening (4) in the inlet plate (1) in the closing direction (8) of the sliding plate (2).
  2. Set of plates as claimed in claim 1, characterised in that the axial offset (X) is 10 to 50% of the diameter of the flow opening (4) in the inlet plate (1).
  3. Set of plates as claimed in claim 1, characterised in that conical broadened regions (15) are provided on the mutually opposing edges of the opening in the outlet plate (3) in the direction of movement of the sliding plate (2).
  4. Set of plates as claimed in claim 3, characterised in that a single conical broadened region (17) is disposed in the opening direction of the sliding plate (2).
  5. Set of plates as claimed in claims 1, 3 and 4, characterised in that the annular breadth of the conical broadened regions (14,15,17) corresponds at least to the size of the axial offset (X).
  6. Set of plates as claimed in one of the preceding claims, characterised in that the diameter of the flow opening (16) of the outlet plate (3) is at most by twice of the size of the axial offset (X) smaller than the diameter of the flow opening (4) of the inlet plate.
EP88114176A 1988-08-31 1988-08-31 Set of ceramic plates for sliding gate valves comprising three sliding plates Expired - Lifetime EP0356551B1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
ES198888114176T ES2031561T3 (en) 1988-08-31 1988-08-31 SET OF REFRACTORY PLATES FOR THREE-PLATE SLIDING LATCHES.
DE8888114176T DE3869609D1 (en) 1988-08-31 1988-08-31 FIRE-RESISTANT PLATE SET FOR THREE-PLATE SLIDING LATCHES.
AT88114176T ATE74036T1 (en) 1988-08-31 1988-08-31 FIRE RESISTANT PLATE SET FOR THREE PLATE VALVE CLOSURES.
EP88114176A EP0356551B1 (en) 1988-08-31 1988-08-31 Set of ceramic plates for sliding gate valves comprising three sliding plates
ZA895235A ZA895235B (en) 1988-08-31 1989-07-10 Refractory plate set for three-plate sliding gate valves
CA000607347A CA1340540C (en) 1988-08-31 1989-08-02 Refractory plate set of three-plate sliding gate valves
CS478989A CS273200B2 (en) 1988-08-31 1989-08-14 Refractory system of plates for three-plate slide valve closures
JP1215159A JPH0289559A (en) 1988-08-31 1989-08-23 Fireproof board device for three-board sliding closing device
AR89314757A AR241644A1 (en) 1988-08-31 1989-08-25 A set of refractory plates for a sliding closure provided with three plates.
MX017330A MX171518B (en) 1988-08-31 1989-08-28 SET OF REFRACTORY PLATES FOR THREE-PLATE SLIDING CIRCLES
US07/400,056 US4966315A (en) 1988-08-31 1989-08-29 Refractory plate assembly for a three-plate sliding closure unit
CN89106645A CN1018805B (en) 1988-08-31 1989-08-30 Refractory gate plate for triplate gate valve
SU894614846A SU1731039A3 (en) 1988-08-31 1989-08-30 Refractory disc set for three-disc closure
HU450689A HU209419B (en) 1988-08-31 1989-08-30 Fire-proof plate system for latch consists of three plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88114176A EP0356551B1 (en) 1988-08-31 1988-08-31 Set of ceramic plates for sliding gate valves comprising three sliding plates

Publications (2)

Publication Number Publication Date
EP0356551A1 EP0356551A1 (en) 1990-03-07
EP0356551B1 true EP0356551B1 (en) 1992-03-25

Family

ID=8199246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114176A Expired - Lifetime EP0356551B1 (en) 1988-08-31 1988-08-31 Set of ceramic plates for sliding gate valves comprising three sliding plates

Country Status (14)

Country Link
US (1) US4966315A (en)
EP (1) EP0356551B1 (en)
JP (1) JPH0289559A (en)
CN (1) CN1018805B (en)
AR (1) AR241644A1 (en)
AT (1) ATE74036T1 (en)
CA (1) CA1340540C (en)
CS (1) CS273200B2 (en)
DE (1) DE3869609D1 (en)
ES (1) ES2031561T3 (en)
HU (1) HU209419B (en)
MX (1) MX171518B (en)
SU (1) SU1731039A3 (en)
ZA (1) ZA895235B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917851A1 (en) * 1999-04-21 2000-10-26 Didier Werke Ag Rotary valve plate

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0603480A3 (en) * 1992-11-25 1997-09-17 Stopinc Ag Sliding closure in particular for a converter holding a bath of molten metal.
US5518154A (en) * 1994-11-17 1996-05-21 Usx Corporation Gate and pour tube assembly for use in throttling gate valve
ATE309877T1 (en) * 2000-03-16 2005-12-15 Vesuvius Crucible Co SLIDE CUTTER FOR CONTROLLING THE POURING JET OF LIQUID METAL
AU2003902165A0 (en) * 2003-05-07 2003-05-22 Castalloy Manufacturing Pty Ltd Slide shutoff for metal flow in corecast process
TWI302493B (en) * 2006-06-13 2008-11-01 Advanced Semiconductor Eng System for supplying molding compound
FI120385B (en) * 2007-07-06 2009-10-15 Indref Oy Sealing mechanism for metering of metal melt and method for manufacturing a sealing mechanism
EP2268432B1 (en) * 2008-04-17 2016-04-13 Stopinc Aktiengesellschaft Closing plate and sliding closure on the spout of a receptacle for molten metal
RS53188B (en) * 2011-07-08 2014-06-30 Refractory Intellectual Property Gmbh & Co. Kg Fire-resistant ceramic sliding plate and accompanying sliding plate set
CN107175326A (en) * 2017-06-28 2017-09-19 秦皇岛首秦金属材料有限公司 A kind of steel ladle slide board structure
US11434775B2 (en) 2020-08-31 2022-09-06 Rolls-Royce North American Technologies Inc. Turbine engine with metered cooling system

Citations (5)

* Cited by examiner, † Cited by third party
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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757219A (en) * 1969-10-13 1971-03-16 Interstop Ag DISCHARGE DRAWER CLOSURE FOR METAL CASTING TANKS
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
DE3509932A1 (en) * 1985-03-19 1986-10-02 Metacon AG, Zürich METHOD FOR STARTING UP A CONTINUOUS CASTING SYSTEM

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917851A1 (en) * 1999-04-21 2000-10-26 Didier Werke Ag Rotary valve plate
DE19917851C2 (en) * 1999-04-21 2003-04-10 Didier Werke Ag Rotary valve plate

Also Published As

Publication number Publication date
ES2031561T3 (en) 1992-12-16
US4966315A (en) 1990-10-30
CA1340540C (en) 1999-05-11
CN1018805B (en) 1992-10-28
HUT54545A (en) 1991-03-28
DE3869609D1 (en) 1992-04-30
CS478989A2 (en) 1990-06-13
ZA895235B (en) 1990-04-25
AR241644A1 (en) 1992-10-30
SU1731039A3 (en) 1992-04-30
ATE74036T1 (en) 1992-04-15
EP0356551A1 (en) 1990-03-07
MX171518B (en) 1993-11-03
HU209419B (en) 1994-06-28
CN1040939A (en) 1990-04-04
CS273200B2 (en) 1991-03-12
JPH0289559A (en) 1990-03-29

Similar Documents

Publication Publication Date Title
DE2620423B2 (en) Slide plate unit for slide gate locks
EP0356551B1 (en) Set of ceramic plates for sliding gate valves comprising three sliding plates
DE2409670A1 (en) METHOD AND DEVICE FOR CONTROLLING THE FLOW OF THE MELT FROM CASTING PANS PROVIDED WITH A BOTTOM SPOUT
DE1951447C3 (en) Outflow slide closure for vessels for pouring metals
DE69504366T2 (en) LOCKING AND PIPING DEVICE FOR USE IN A THROTTLE VALVE
AT390579B (en) FIREPROOF PAIR OF PLATES FOR SWIVELING OR. ROTATING SLIDER LATCHES
DE60115040T2 (en) SLIDING SHUTTER FOR REGULATING THE CAST SPRAY OF LIQUID METAL
AT395392B (en) LOCKING PLATE IN FIRE-RESISTANT MATERIAL FOR LINEAR OR TURNTABLE LATCHES
DE3805071C2 (en)
EP0630711B1 (en) Immersion nozzle
EP0320575B1 (en) Method for keeping open the flow conduit of slide gate nozzles in continuous casting plants
WO1990011854A1 (en) A sliding closure at the outlet of a vessel, especially one containing molten metal, and suitable fireproof closure components
DE2417489C3 (en) Spout for metallurgical vessels
DE68905086T2 (en) MOLDING CAP FOR LINEAR AND SYMMETRY-AXIAL ADJUSTMENT.
DE3426107C2 (en) Sliding closure for horizontal pouring of vessels containing non-ferrous metal melt
EP2543455B1 (en) Fire-resistant ceramic sliding plate and accompanying sliding plate set
EP0226766B1 (en) Plate unit for sliding gate valves
EP0436813B1 (en) Shut-off and/or control device
DE2834643C2 (en)
EP0529108B1 (en) Slide gate nozzle for metallurgical vessels
DE2459568A1 (en) LOCKING SLIDER DEVICE FOR FIRE-RESISTANT CONTAINERS
WO2009033633A1 (en) Refractory ceramic adaptor
DE1508797C (en) Device on ein.Gießgefäß for changing the position of the pouring stream, especially during continuous casting
CH624863A5 (en) Method for preventing the accumulation of oxidic inclusions during the casting of deoxidised steels
DE69213214T2 (en) Spout for containers, containers and pouring method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900707

17Q First examination report despatched

Effective date: 19910326

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920325

REF Corresponds to:

Ref document number: 74036

Country of ref document: AT

Date of ref document: 19920415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3869609

Country of ref document: DE

Date of ref document: 19920430

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2031561

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 88114176.6

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020802

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030801

Year of fee payment: 16

Ref country code: AT

Payment date: 20030801

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030820

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030821

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040825

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20040826

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040901

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040907

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040917

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040930

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050429

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050301

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050831

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050831

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060301

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050831

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050901

BERE Be: lapsed

Owner name: *METACON A.G.

Effective date: 20050831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20070830

Year of fee payment: 20