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 PDFInfo
- 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
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- 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
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- 239000000919 ceramic Substances 0.000 title 1
- 239000000155 melt Substances 0.000 claims description 16
- 238000009749 continuous casting Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000000161 steel melt Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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)
- Furnace Charging Or Discharging (AREA)
- Connection Of Batteries Or Terminals (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.
- 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
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
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
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
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
Claims (6)
- 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).
- 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).
- 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).
- 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).
- 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).
- 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.
Priority Applications (14)
| 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 |
| 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. |
| 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 |
| HU450689A HU209419B (en) | 1988-08-31 | 1989-08-30 | Fire-proof plate system for latch consists of three plates |
| 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 |
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)
| 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)
| 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 |
| DE60115040T2 (en) * | 2000-03-16 | 2006-07-13 | Vesuvius Crucible Co., Wilmington | SLIDING SHUTTER FOR REGULATING THE CAST SPRAY 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 |
| JP5426658B2 (en) * | 2008-04-17 | 2014-02-26 | シュトピンク・アクティーエンゲゼルシャフト | Flow port closing plate and slide lid of molten metal container |
| RS53188B (en) | 2011-07-08 | 2014-06-30 | Refractory Intellectual Property Gmbh & Co. Kg | FIRE-RESISTANT CERAMIC SLIDING PANEL AND ASSOCIATED SLIDING PANEL ASSEMBLY |
| 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)
| 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 (1)
| 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 |
-
1988
- 1988-08-31 AT AT88114176T patent/ATE74036T1/en not_active IP Right Cessation
- 1988-08-31 ES ES198888114176T patent/ES2031561T3/en not_active Expired - Lifetime
- 1988-08-31 EP EP88114176A patent/EP0356551B1/en not_active Expired - Lifetime
- 1988-08-31 DE DE8888114176T patent/DE3869609D1/en not_active Expired - Lifetime
-
1989
- 1989-07-10 ZA ZA895235A patent/ZA895235B/en unknown
- 1989-08-02 CA CA000607347A patent/CA1340540C/en not_active Expired - Fee Related
- 1989-08-14 CS CS478989A patent/CS273200B2/en not_active IP Right Cessation
- 1989-08-23 JP JP1215159A patent/JPH0289559A/en active Pending
- 1989-08-25 AR AR89314757A patent/AR241644A1/en active
- 1989-08-28 MX MX017330A patent/MX171518B/en unknown
- 1989-08-29 US US07/400,056 patent/US4966315A/en not_active Expired - Lifetime
- 1989-08-30 HU HU450689A patent/HU209419B/en not_active IP Right Cessation
- 1989-08-30 CN CN89106645A patent/CN1018805B/en not_active Expired
- 1989-08-30 SU SU894614846A patent/SU1731039A3/en active
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 (2)
| 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 |
|---|---|
| CA1340540C (en) | 1999-05-11 |
| ZA895235B (en) | 1990-04-25 |
| CS478989A2 (en) | 1990-06-13 |
| ATE74036T1 (en) | 1992-04-15 |
| DE3869609D1 (en) | 1992-04-30 |
| CN1040939A (en) | 1990-04-04 |
| ES2031561T3 (en) | 1992-12-16 |
| AR241644A1 (en) | 1992-10-30 |
| HU209419B (en) | 1994-06-28 |
| CN1018805B (en) | 1992-10-28 |
| SU1731039A3 (en) | 1992-04-30 |
| EP0356551A1 (en) | 1990-03-07 |
| US4966315A (en) | 1990-10-30 |
| HUT54545A (en) | 1991-03-28 |
| JPH0289559A (en) | 1990-03-29 |
| CS273200B2 (en) | 1991-03-12 |
| MX171518B (en) | 1993-11-03 |
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