EP1485219A1 - Method for operating a sliding gate and sliding gate - Google Patents

Method for operating a sliding gate and sliding gate

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Publication number
EP1485219A1
EP1485219A1 EP03720347A EP03720347A EP1485219A1 EP 1485219 A1 EP1485219 A1 EP 1485219A1 EP 03720347 A EP03720347 A EP 03720347A EP 03720347 A EP03720347 A EP 03720347A EP 1485219 A1 EP1485219 A1 EP 1485219A1
Authority
EP
European Patent Office
Prior art keywords
closure
measured
sliding
plates
housing parts
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.)
Granted
Application number
EP03720347A
Other languages
German (de)
French (fr)
Other versions
EP1485219B1 (en
Inventor
Pierre Gerber
Urs Basler
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.)
Stopinc AG
Original Assignee
Stopinc AG
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Filing date
Publication date
Application filed by Stopinc AG filed Critical Stopinc AG
Publication of EP1485219A1 publication Critical patent/EP1485219A1/en
Application granted granted Critical
Publication of EP1485219B1 publication Critical patent/EP1485219B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B22D41/28—Plates therefor
    • 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

Definitions

  • the invention relates to a method for operating a slide closure for metallurgical vessels, in which the slide closure has at least two fire-resistant closure plates which can be braced against one another and which are each displaceably arranged on sliding surfaces against one another in a housing part, wherein spring elements in at least one of the housing parts contain the closure plates are, and the one closure plate with its housing part of a drive member can be moved into a closed or open position.
  • Sliding closures are used in particular in continuous casting plants on pans or distribution tanks for a controlled pouring of the molten steel.
  • the refractory closure plates and refractory sleeves used in the sliding closure, through which the molten steel melt flows off, as well as the mechanics carrying them, are exposed to a relatively high level of wear. The plates and sleeves therefore have to be replaced frequently.
  • the present invention was based on the object of creating a method for operating a sliding closure according to the type mentioned at the outset, by means of which the operational safety is increased and impending operational disruptions, such as breakthroughs, can be recognized at an early stage.
  • the object is achieved according to the invention in that an offline and / or online diagnosis of the operating state, in particular in the loading range of the closing plates is carried out, in which one or more gauges are measured in terms of dimensions, temperatures, pressures and / or forces in the sliding lock and evaluated directly or with reference to additional relevant process parameters in order to determine the operational status and, consequently, further use of the sliding lock.
  • the distance between the housing parts, each receiving a closure plate, in the direction transverse to the sliding surfaces of the plate is determined and passed to an evaluation unit, this distance preferably being measured at several points.
  • the pressure to be measured and the stroke position of the displaceable closure plate are preferably determined and evaluated as the quantity to be measured, from which conclusions can be drawn in particular about the friction conditions and thus the condition of the closure plates with their mutually contacting sliding surfaces.
  • FIG. 1 shows a schematic illustration of a slide closure and an evaluation unit which operate according to the method according to the invention
  • FIG. 2 shows a cross section of a slide closure with a measuring arrangement.
  • FIG. 1 shows schematically a sliding closure 10 on a partially shown metallurgical vessel 15, which is, for example, a ladle of a continuous casting installation containing molten steel. From the vessel 15, a steel jacket 11, a refractory lining 12, a perforated brick 14 and a refractory sleeve 13 with an outlet 16 are illustrated.
  • the sliding closure 10 has an upper housing part 17, in which a fire-proof closure plate 21 is fastened.
  • the displaceable closure plate 22 is held in a further housing part 19, the housing part 19 being guided in a housing frame 18 and being movable by a drive element 25 into an open position - as shown - or into a closed position.
  • This drive member 25 is designed as a hydraulic piston / cylinder unit and is therefore fed via lines 26, 27 from a hydraulic unit 29.
  • the closure plates 21, 22 are pressed against one another by spring elements 23, so that an adequate seal is present between them.
  • the method for operating the slide closure 10 is used to carry out an offline and / or online diagnosis of the operating state, in particular in the area of the closure plates 21, 22, in which several sizes with regard to the dimensions of the slide closure 10 conditions, temperatures, pressures and / or forces are measured and evaluated directly or with the inclusion of additional relevant process parameters in order to be able to determine the operational state and consequently the use of the sliding closure 10.
  • the variables measured as actual values are compared with a target value or a target value range and, if there are deviations outside the tolerance limit, a display or the like is given for a check or an emergency closing of the slide closure.
  • the pressure of the drive element and the stroke position of the displaceable closure plate are determined and evaluated as one of the quantities to be measured, from which in particular the frictional relationships and thus the state of the closure plates with their mutually contacting sliding surfaces can be concluded.
  • the supply lines 26, 27 for the cylinder are assigned pressure measuring sockets 28, which measure the current pressures and deliver corresponding signal values to an evaluation unit 20 via electrical lines 28 '.
  • the temperatures near the closure plates 21, 22 are measured as further variables.
  • the housing parts 17, 19 are equipped at various points with measuring probes 31, 32, which measure the current temperatures and transmit them to the evaluation unit 20 via corresponding electrical lines 33, 34.
  • any leaks in which liquid steel would leak between the plate and sleeve or between the plates can be detected early and breakthroughs prevented.
  • at least one of these temperatures deviates from a predetermined value, depending on the magnitude of the deviation, either an immediate closure of the closure or a message for a check can take place.
  • the evaluation unit 20 expediently comprises a computer with a screen 61 and a keyboard 62 for programming and for menu guidance for the execution of the method. Furthermore, an emergency light 63 and an alarm 64 are also indicated, by means of which any operational faults in the slide lock can be made audible or visible.
  • the evaluation unit 20 could of course also be connected to an external computer or central computer, for example in a control center.
  • the contact pressure of the spring elements 23 bracing the closure plates 21, 22 can also be measured in order to determine whether one or more of the spring elements 23 is no longer functional.
  • a measurement can be carried out using a strain gauge or a piezo element or the like. Both these pressure measurements and the temperature measurements can be carried out online, ie during pouring, and / or offline, ie after pouring, when the sliding closure has been brought to an assembly station together with the pan.
  • the nominal value or the nominal value range of the variables to be measured by the additional process parameters can be adapted during the period of use of the sliding closure.
  • the wear of the closure plates in their sliding surfaces or in their flow openings can affect the temperatures in the measuring probes 31, 32.
  • an increase in temperature can occur with the duration of use of the closure without there being any errors.
  • a logging and storage of the measured sizes of the sliding closure is carried out with information about the pan, the melt to be poured with regard to temperature, treatment, casting time, etc.
  • These stored variables also serve as process parameters which are used in the evaluation and on the basis of which the setpoints are adapted and filtering is also carried out when comparing measured variables with the setpoints in order to rule out false alarms as far as possible.
  • FIG. 2 shows a slide closure 40, which is described in detail in the publication WO-A-00/6325 and is therefore only explained below in the details relevant to the invention.
  • An upper housing part 47 fixed to a vessel 35 is provided, one that can be fastened therein Closure plate 41 and a lower housing part 49, in which a fire-proof closure plate 42 is held, which is arranged movably perpendicular to the image plane.
  • roller guides 44 are fastened to the upper housing part 47, by means of which the housing part 49 guided thereon is held movably. The spring elements in these roller guides 44 cause the lower to the upper closing plate 41, 42.
  • the housing parts 47, 49 are advantageously equipped on both sides with two measuring probes 50 arranged at a distance from one another, by means of which the distance 53 of the two housing parts from one another in the direction transverse to the plate sliding surfaces 41 ', 42' is determined and is each routed to the evaluation unit 20 via an indicated line 51.
  • a distance 53 from each of these measuring probes 50 attached to the upper housing part 47 is measured to a measuring element 52 which is fixed to the lower housing part 49.
  • measuring probes 50 and measuring elements 52 are advantageously encapsulated in a manner not shown in detail, so that they are protected against damage. They could also be integrated directly in the housing parts 47, 49. In principle, only one measuring probe 50 would suffice.
  • the positions of the closure plates 41, 42 can be diagnosed with respect to their change transverse to the sliding surfaces 41 ', 42'. If, for example, molten steel penetrates between the plates, a thin sheet of metal can form between them, which can cause the plates to be pressed apart, thus creating the risk that uncontrolled molten steel flows out between these plates at the sliding surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Cable Accessories (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention relates to a method for operating a sliding gate for metallurgical vessels in which the sliding gate (10) has at least two fire-resistant gate plates (21, 22), which can be tensioned against one another and which are each arranged inside a respective housing part (17, 19) in a manner that enables them to slide relative to one another. Spring elements (23) are provided in at least one of the housing parts (17, 19) in order to tension the gate plates (21, 22). One gate plate (22) can, with its housing part (19), be slid into a closed or open position by means of a drive element. An offline and/or online diagnosis of the operating state is carried out, in particular, in the area of the gate plates (21, 22, 41, 42) during which one or more variables with regard to dimensions, temperatures, pressures and/or forces are measured at the sliding gate (10, 40) and are evaluated directly or while including additional relevant process parameters in order to be able to locate it during the operating state and, therefore, during an additional use of the sliding gate (10). Interruptions can be largely prevented as a result.

Description

Verfahren zum Betrieb eines Schiebeverschlusses sowie Schiebe- verschluss Process for operating a slide lock and slide lock
Die Erfindung betrifft ein Verfahren zum Betrieb eines Schiebeverschlusses für metallurgische Gefässe, bei dem der Schiebeverschluss wenigstens zwei gegeneinander verspannbare feuerfeste Verschlussplatten aufweist, welche jeweils in einem Gehäuseteil an Gleitflächen gegeneinander verschiebbar angeordnet sind, wobei für die Verspannung der Verschlussplatten Federelemente in wenigstens einem der Gehäuseteile enthalten sind, und die eine Verschlussplatte mit ihrem Gehäuseteil von einem Antriebsorgan in eine Schliess- bzw. Offenstellung verschoben werden kann.The invention relates to a method for operating a slide closure for metallurgical vessels, in which the slide closure has at least two fire-resistant closure plates which can be braced against one another and which are each displaceably arranged on sliding surfaces against one another in a housing part, wherein spring elements in at least one of the housing parts contain the closure plates are, and the one closure plate with its housing part of a drive member can be moved into a closed or open position.
Schiebeverschlüsse werden insbesondere bei Stranggiessanlagen an Pfannen oder Verteilerbehältern für ein geregeltes Abgiessen der Stahlschmelze eingesetzt. Die in dem Schiebeverschluss verwendeten feuerfesten Verschlussplatten und feuerfesten Hülsen, durch welche die flüssige Stahlschmelze abfliesst, wie auch die diese tragende Mechanik sind einem relativ starken Verschleiss ausgesetzt. Die Platten und Hülsen müssen daher des öfteren ausgewechselt werden.Sliding closures are used in particular in continuous casting plants on pans or distribution tanks for a controlled pouring of the molten steel. The refractory closure plates and refractory sleeves used in the sliding closure, through which the molten steel melt flows off, as well as the mechanics carrying them, are exposed to a relatively high level of wear. The plates and sleeves therefore have to be replaced frequently.
Zur Erzielung einer hohen Wirtschaftlichkeit werden diese feuerfesten Teile so oft als möglich im Schiebeverschluss belassen und eingesetzt. Wie manche Pfannenentleerungen mit den Verschlussplatten und Hülsen gefahren werden kann, wird durch das Bedienpersonal anhand von Sichtkontrollen und Erfahrungswerten festgelegt. In der Praxis hat sich jedoch gezeigt, dass aufgrund von Fehleinschätzungen oder ungenügenden Kontrollmöglichkeiten Durchbrüche entstehen, bei denen die Stahlschmelze unkontrolliert im Schiebeverschluss ausfliessen und dadurch letzteren beschädigen oder gar zerstören kann. Dies trifft auch bei Fehlmontagen der Schiebeverschlüsse zu, bei denen beispielsweise nur ungenügend Mörtel zwischen den Feuerfestteilen vorgesehen wird.To achieve a high level of economy, these refractory parts are left in the sliding lock as often as possible and used. The operating personnel determine how some pan emptying with the closure plates and sleeves can be carried out on the basis of visual checks and empirical values. In practice, however, it has been shown that breakthroughs occur due to incorrect assessments or inadequate control options, in which the molten steel flows out in an uncontrolled manner in the sliding closure and can thereby damage or even destroy the latter. This also applies to incorrect assembly of the sliding closures, in which, for example, insufficient mortar is provided between the refractory parts.
Ausgehend davon wurde der vorliegenden Erfindung die Aufgabe zugrundegelegt, ein Verfahren zum Betrieb eines Schiebeverschlusses nach der eingangs erwähnten Gattung zu schaffen, mittels welchem die Betriebssicherheit erhöht und sich anbahnende Betriebsstörungen, wie Durchbrüche, frühzeitig erkannt werden können.Proceeding from this, the present invention was based on the object of creating a method for operating a sliding closure according to the type mentioned at the outset, by means of which the operational safety is increased and impending operational disruptions, such as breakthroughs, can be recognized at an early stage.
Die Aufgabe ist erfindungsgemäss dadurch gelöst, dass eine off- und/oder online Diagnose des Betriebszustandes insbesondere im Be- reich der Verschlussplatten durchgeführt wird, bei der beim Schiebeverschluss eine oder mehrere Grossen bezüglich Abmessungen, Temperaturen, Drücke und/oder Kräfte gemessen und unmittelbar oder unter Ein- bezug von zusätzlichen relevanten Prozessparametern ausgewertet werden, um über den betrieblichen Zustand und demzufolge über einen weiteren Einsatz des Schiebeverschlusses befinden zu können.The object is achieved according to the invention in that an offline and / or online diagnosis of the operating state, in particular in the loading range of the closing plates is carried out, in which one or more gauges are measured in terms of dimensions, temperatures, pressures and / or forces in the sliding lock and evaluated directly or with reference to additional relevant process parameters in order to determine the operational status and, consequently, further use of the sliding lock.
Mit diesem erfindungsgemässen Verfahren können Betriebsstörungen und insbesondere Durchbrüche, bei welchen oft die gesamte Schiebe- verschlussmechanik und womöglich auch Teile der Stranggiessanlage zerstört werden, weitgehend vermieden werden. Insbesondere können auch Fehlmontagen am Schieberverschluss erkannt und auch hieraus Durchbrüche verhindert werden.With this method according to the invention, operational disruptions and in particular breakthroughs, in which the entire slide lock mechanism and possibly also parts of the continuous casting installation are often destroyed, can be largely avoided. In particular, incorrect assemblies on the slide closure can also be recognized and breakthroughs can also be prevented therefrom.
Bei einer vorteilhaften Ausführung wird als Abmessung die Distanz der jeweils eine Verschlussplatte aufnehmenden Gehäuseteile zueinander in Richtung quer zu den Platten-Gleitflächen ermittelt und an eine Auswerteeinheit geleitet, wobei diese Distanz vorzugsweise an mehreren Stellen gemessen wird. Mit der Messung dieser Distanzen der beiden Gehäuseteile zueinander können insbesondere die Positionen der Verschlussplatten hinsichtlich ihrer Veränderung quer zu den Gleitflächen diagnostiziert und damit sich bildende Bleche zwischen den Platten er- fasst werden.In an advantageous embodiment, the distance between the housing parts, each receiving a closure plate, in the direction transverse to the sliding surfaces of the plate, is determined and passed to an evaluation unit, this distance preferably being measured at several points. By measuring these distances between the two housing parts relative to one another, in particular the positions of the closure plates with regard to their change transversely to the sliding surfaces can be diagnosed and sheet metal that forms between the plates can be detected.
Vorzugsweise wird als zu messende Grosse der Druck des Antriebsorga- nes sowie die Hubposition der verschiebbaren Verschlussplatte ermittelt und ausgewertet, woraus insbesondere auf die Reibungsverhältnisse und damit auf den Zustand der Verschlussplatten bei ihren sich gegenseitig berührenden Gleitflächen geschlossen werden kann. Ausführungsbeispiele der Erfindung sowie weitere Vorteile derselben sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:The pressure to be measured and the stroke position of the displaceable closure plate are preferably determined and evaluated as the quantity to be measured, from which conclusions can be drawn in particular about the friction conditions and thus the condition of the closure plates with their mutually contacting sliding surfaces. Embodiments of the invention and further advantages thereof are explained in more detail below with reference to the drawing. It shows:
Fig.1 eine schematische Darstellung eines Schiebeverschlusses sowie einer Auswerteeinheit, die nach dem erfindungsgemässen Verfahren arbeiten, und1 shows a schematic illustration of a slide closure and an evaluation unit which operate according to the method according to the invention, and
Fig.2 einen Querschnitt eines Schiebeverschlusses mit einer Messanordnung.2 shows a cross section of a slide closure with a measuring arrangement.
Fig.1 zeigt schematisch einen Schiebeverschluss 10 an einem teilweise dargestellten metallurgischen Gefäss 15, bei dem es sich beispielsweise um eine Stahlschmelze enthaltende Pfanne einer Stranggiessanlage handelt. Von dem Gefäss 15 sind ein Stahlmantel 1 1 , eine feuerfeste Auskleidung 12, ein Lochstein 14 sowie eine feuerfeste Hülse 13 mit einem Auslass 16 veranschaulicht.1 shows schematically a sliding closure 10 on a partially shown metallurgical vessel 15, which is, for example, a ladle of a continuous casting installation containing molten steel. From the vessel 15, a steel jacket 11, a refractory lining 12, a perforated brick 14 and a refractory sleeve 13 with an outlet 16 are illustrated.
Der Schiebeverschluss 10 hat ein oberes Gehäuseteil 17, in dem eine feuerfeste Verschlussplatte 21 befestigt ist. In einem weiteren Gehäuseteil 19 ist die verschiebbare Verschlussplatte 22 gehalten, wobei der Gehäuseteil 19 in einem Gehäuserahmen 18 geführt ist und von einem Antriebsorgan 25 in eine Offenstellung - wie dargestellt - oder in eine Schliessstellung bewegbar ist. Dieses Antriebsorgan 25 ist als hydraulische Kolben/Zylinder-Einheit ausgebildet und demnach über Leitungen 26, 27 von einem Hydraulikaggregat 29 gespiesen. Ferner sind die Verschlussplatten 21 , 22 von Federelementen 23 aneinandergepresst, so dass zwischen diesen eine ausreichende Abdichtung vorhanden ist.The sliding closure 10 has an upper housing part 17, in which a fire-proof closure plate 21 is fastened. The displaceable closure plate 22 is held in a further housing part 19, the housing part 19 being guided in a housing frame 18 and being movable by a drive element 25 into an open position - as shown - or into a closed position. This drive member 25 is designed as a hydraulic piston / cylinder unit and is therefore fed via lines 26, 27 from a hydraulic unit 29. Furthermore, the closure plates 21, 22 are pressed against one another by spring elements 23, so that an adequate seal is present between them.
Mit dem Verfahren zum Betrieb des Schiebeverschlusses 10 wird erfin- dungsgemäss eine off- und/oder online Diagnose des Betriebszustandes insbesondere im Bereich der Verschlussplatten 21 , 22 durchgeführt, bei der beim Schiebeverschluss 10 mehrere Grossen bezüglich Abmessun- gen, Temperaturen, Drücke und/oder Kräfte gemessen und unmittelbar oder unter Einbezug von zusätzlichen relevanten Prozessparametern ausgewertet werden, um über den betrieblichen Zustand und demzufolge über den Einsatz des Schiebeverschlusses 10 befinden zu können.According to the invention, the method for operating the slide closure 10 is used to carry out an offline and / or online diagnosis of the operating state, in particular in the area of the closure plates 21, 22, in which several sizes with regard to the dimensions of the slide closure 10 conditions, temperatures, pressures and / or forces are measured and evaluated directly or with the inclusion of additional relevant process parameters in order to be able to determine the operational state and consequently the use of the sliding closure 10.
Bei der Auswertung werden die als Istwerte gemessenen Grossen mit einem Sollwert oder einem Sollwertbereich verglichen und bei Vorliegen von Abweichungen ausserhalb der Toleranzgrenze eine Anzeige oder dergleichen für eine Überprüfung oder ein Notschliessen des Schiebeverschlusses erfolgt.During the evaluation, the variables measured as actual values are compared with a target value or a target value range and, if there are deviations outside the tolerance limit, a display or the like is given for a check or an emergency closing of the slide closure.
Im Rahmen der Erfindung wird als eine der zu messenden Grossen der Druck des Antriebsorganes sowie die Hubposition der verschiebbaren Verschlussplatte ermittelt und ausgewertet, woraus insbesondere auf die Reibungsverhältnisse und damit auf den Zustand der Verschlussplatten bei ihren sich gegenseitig berührenden Gleitflächen geschlossen werden kann. Zu diesem Zwecke sind den Versorgungsleitungen 26, 27 für den Zylinder Druckmessdosen 28 zugeordnet, welche die aktuellen Drücke messen und entsprechende Signalwerte über elektrische Leitungen 28' an eine Auswerteeinheit 20 liefern.Within the scope of the invention, the pressure of the drive element and the stroke position of the displaceable closure plate are determined and evaluated as one of the quantities to be measured, from which in particular the frictional relationships and thus the state of the closure plates with their mutually contacting sliding surfaces can be concluded. For this purpose, the supply lines 26, 27 for the cylinder are assigned pressure measuring sockets 28, which measure the current pressures and deliver corresponding signal values to an evaluation unit 20 via electrical lines 28 '.
Bei einer Messung des Druckes des Antriebsorganes können Aufschlüsse über die Reibungsverhältnisse der Platten 21 , 22 in Abhängigkeit der Hubposition der Schieberplatte 22 zur Bodenplatte 21 und auch über die Anpressdrücke der Federelemente 23 erhoben werden. Bei einer Abweichung von einem entsprechenden Sollwert kann je nach Grosse der Abweichung ein Weitergiessen gestoppt, oder nach dem Fertiggiessen der Schiebeverschluss einer entsprechenden Überprüfung unterzogen und eine allfällige Auswechslungen der Verschluss'platten oder anderer defekter Teile vorgenommen werden. Sobald die nach der Kontrolle ge- messenen Werte wieder innerhalb des Sollwertes liegen, kann der Schiebeverschluss wieder eingesetzt werden.When measuring the pressure of the drive element, information can be obtained about the frictional relationships of the plates 21, 22 as a function of the stroke position of the slide plate 22 relative to the base plate 21 and also about the contact pressures of the spring elements 23. In a deviation from a corresponding desired value a further casting, depending on the size of the deviation stopped or subjected to an appropriate inspection after the final molding of the sliding closure and a possible replacements of the closure 'plates or other defective parts are made. As soon as the measured values are again within the target value, the slide lock can be used again.
Als weitere Grossen werden die Temperaturen nahe bei den Verschlussplatten 21 , 22 gemessen. Zu diesem Zwecke sind die Gehäuseteile 17, 19 an verschiedenen Stellen mit Messsonden 31 , 32 bestückt, welche die aktuellen Temperaturen messen und diese über entsprechende elektrische Leitungen 33, 34 an die Auswerteeinheit 20 übermitteln. Mit diesen Temperaturmessungen können allfällige Lecks, bei denen flüssiger Stahl zwischen Platte und Hülse oder zwischen den Platten austreten würde, frühzeitig festgestellt und Durchbrüche verhindert werden. Sobald zumindest eine dieser Temperaturen von einem vorgegebnen Wert abweicht, kann je nach Stärke der Abweichung entweder ein sofortiges Schliessen des Verschlusses oder aber eine Mitteilung für eine Überprüfung erfolgen.The temperatures near the closure plates 21, 22 are measured as further variables. For this purpose, the housing parts 17, 19 are equipped at various points with measuring probes 31, 32, which measure the current temperatures and transmit them to the evaluation unit 20 via corresponding electrical lines 33, 34. With these temperature measurements, any leaks in which liquid steel would leak between the plate and sleeve or between the plates can be detected early and breakthroughs prevented. As soon as at least one of these temperatures deviates from a predetermined value, depending on the magnitude of the deviation, either an immediate closure of the closure or a message for a check can take place.
Zweckmässigerweise umfasst die Auswerteeinheit 20 einen Computer mit einem Bildschirm 61 und einer Tastatur 62 zur Programmierung und zur Menueführung für die Abwicklung des Verfahrens. Des weiteren sind noch eine Notleuchte 63 und ein Alarm 64 angedeutet, mittels denen allfällige betriebliche Störungen beim Schiebeverschluss hörbar bzw. sichtbar gemacht werden können. Die Auswerteeinheit 20 könnte selbstverständlich auch mit einem externen Computer bzw. Zentralrechner beispielsweise in einer Kontrollzentrale verbunden sein.The evaluation unit 20 expediently comprises a computer with a screen 61 and a keyboard 62 for programming and for menu guidance for the execution of the method. Furthermore, an emergency light 63 and an alarm 64 are also indicated, by means of which any operational faults in the slide lock can be made audible or visible. The evaluation unit 20 could of course also be connected to an external computer or central computer, for example in a control center.
Ferner kann auch noch der Anpressdruck der die Verschlussplatten 21 , 22 verspannenden Federelemente 23 gemessen werden, um festzustellen, ob eines oder mehrere der Federelemente 23 nicht mehr funktionstüchtig ist. Eine solche Messung kann durch einen Dehnmessstreifen oder einem Piezoelement oder dergleichen ausgeführt werden. Sowohl diese Druckmessungen als auch die Temperaturmessungen können online, d.h. während des Abgiessens, und/oder offline, d.h. nach dem Giessen, wenn der Schiebeverschluss zusammen mit der Pfanne an einen Montageplatz gebracht worden ist, durchgeführt werden.Furthermore, the contact pressure of the spring elements 23 bracing the closure plates 21, 22 can also be measured in order to determine whether one or more of the spring elements 23 is no longer functional. Such a measurement can be carried out using a strain gauge or a piezo element or the like. Both these pressure measurements and the temperature measurements can be carried out online, ie during pouring, and / or offline, ie after pouring, when the sliding closure has been brought to an assembly station together with the pan.
Der Sollwert oder der Sollwertbereich der durch die zusätzlichen Prozessparameter zu messenden Grossen kann während der Einsatzdauer des Schiebeverschlusses angepasst werden. So kann sich zum Beispiel der Verschleiss der Verschlussplatten bei ihren Gleitflächen bzw. bei ihren Durchflussöffnungen auf die Temperaturen bei den Messonden 31 , 32 auswirken. Ebenso kann sich eine Temperaturerhöhung mit der Zeitdauer des Einsatzes des Verschlusses einstellen, ohne dass dabei irgendwelche Fehler vorliegen. Diese Veränderungen werden als solche Prozessparameter definiert, welche bei der Auswertung der gemessenen Grossen mitberücksichtigt werden.The nominal value or the nominal value range of the variables to be measured by the additional process parameters can be adapted during the period of use of the sliding closure. For example, the wear of the closure plates in their sliding surfaces or in their flow openings can affect the temperatures in the measuring probes 31, 32. Likewise, an increase in temperature can occur with the duration of use of the closure without there being any errors. These changes are defined as process parameters that are taken into account when evaluating the measured variables.
Als weitere Besonderheit des erfindungsgemässen Verfahrens ist vorgesehen, dass eine Protokollierung und eine Speicherung der gemessenen Grossen des Schiebeverschlusses Angaben über die Pfanne, die abzu- giessende Schmelze im Hinblick auf Temperatur, Behandlung, Giesszeit, etc. durchgeführt wird. Diese gespeicherten Grossen dienen ebenfalls als Prozessparameter, die bei der Auswertung herangezogen werden und anhand von denen die Sollwerte angepasst und auch Filterungen bei Vergleichen von gemessenen Grossen mit den Sollwerten vorgenommen werden, um Fehlalarme möglichst zu auszuschliessen.As a further special feature of the method according to the invention, it is provided that a logging and storage of the measured sizes of the sliding closure is carried out with information about the pan, the melt to be poured with regard to temperature, treatment, casting time, etc. These stored variables also serve as process parameters which are used in the evaluation and on the basis of which the setpoints are adapted and filtering is also carried out when comparing measured variables with the setpoints in order to rule out false alarms as far as possible.
Fig.2 zeigt einen Schiebeverschluss 40, der in der Druckschrift WO-A- 00/6325 ausführlich beschrieben und daher nachfolgend nur in den für die Erfindung relevanten Details erläutert ist. Es ist ein an einem Gefäss 35 fixiertes oberes Gehäuseteil 47 vorgesehen, eine darin befestigbare Verschlussplatte 41 sowie ein unteres Gehäuseteil 49, in dem eine feuerfeste Verschlussplatte 42 gehalten ist, die senkrecht zur Bildebene beweglich angeordnet ist. Zu diesem Zwecke sind Rollenführungen 44 am oberen Gehäuseteil 47 befestigt, durch welche das an diesen geführte Gehäuseteil 49 beweglich gehalten ist. Durch die Federelemente wird bei diesen Rollenführungen 44 die untere an die obere Verschlussplatte 41 , 42 bewirkt wird.FIG. 2 shows a slide closure 40, which is described in detail in the publication WO-A-00/6325 and is therefore only explained below in the details relevant to the invention. An upper housing part 47 fixed to a vessel 35 is provided, one that can be fastened therein Closure plate 41 and a lower housing part 49, in which a fire-proof closure plate 42 is held, which is arranged movably perpendicular to the image plane. For this purpose, roller guides 44 are fastened to the upper housing part 47, by means of which the housing part 49 guided thereon is held movably. The spring elements in these roller guides 44 cause the lower to the upper closing plate 41, 42.
Im Rahmen der Erfindung sind die Gehäuseteile 47, 49 mit Vorteil beid- seitig mit je zwei im Abstand zueinander angeordnete Messsonden 50 ausgestattet, mittels welchen die Distanz 53 der beiden Gehäuseteile zueinander in Richtung quer zu den Platten-Gleitflächen 41 ', 42' ermittelt und jeweils über eine angedeutete Leitung 51 an die Auswerteeinheit 20 geleitet wird. Von diesen am oberen Gehäuseteil 47 befestigten Messsonden 50 wird jeweils eine Distanz 53 bis zu einem Messelement 52 gemessen, welches am unteren Gehäuseteil 49 fixiert ist.In the context of the invention, the housing parts 47, 49 are advantageously equipped on both sides with two measuring probes 50 arranged at a distance from one another, by means of which the distance 53 of the two housing parts from one another in the direction transverse to the plate sliding surfaces 41 ', 42' is determined and is each routed to the evaluation unit 20 via an indicated line 51. A distance 53 from each of these measuring probes 50 attached to the upper housing part 47 is measured to a measuring element 52 which is fixed to the lower housing part 49.
Vorteilhaft sind diese Messsonden 50 und Messelemente 52 auf nicht näher veranschaulichte Weise eingekapselt, damit diese gegen Beschädigungen geschützt sind. Sie könnten auch unmittelbar in den Gehäuseteilen 47, 49 integriert sein. Im Prinzip würde auch nur eine Messsonde 50 genügen.These measuring probes 50 and measuring elements 52 are advantageously encapsulated in a manner not shown in detail, so that they are protected against damage. They could also be integrated directly in the housing parts 47, 49. In principle, only one measuring probe 50 would suffice.
Mit der Messung dieser Distanzen 53 bzw. der linearen Veränderungen der beiden Gehäuseteile 47, 49 zueinander können insbesondere die Positionen der Verschlussplatten 41 , 42 hinsichtlich ihrer Veränderung quer zu den Gleitflächen 41 ', 42' diagnostiziert werden. Wenn beispielsweise Stahlschmelze zwischen die Platten eindringt, so kann sich dort dazwischen ein dünnes Blech bilden, welches bewirken kann, dass die Platten auseinandergedrückt werden und damit das Risiko entsteht, dass zwischen diesen Platten bei den Gleitflächen unkontrolliert Stahlschmelze ausfliesst.By measuring these distances 53 or the linear changes of the two housing parts 47, 49 with respect to one another, in particular the positions of the closure plates 41, 42 can be diagnosed with respect to their change transverse to the sliding surfaces 41 ', 42'. If, for example, molten steel penetrates between the plates, a thin sheet of metal can form between them, which can cause the plates to be pressed apart, thus creating the risk that uncontrolled molten steel flows out between these plates at the sliding surfaces.
Die Erfindung ist mit den oben erläuterten Ausführungsbeispielen ausreichend dargetan. Sie Hesse sich jedoch noch in anderen Varianten darstellen.The invention is sufficiently demonstrated with the exemplary embodiments explained above. However, they are presented in other variants.
Im Prinzip könnte beim Schiebeverschluss auch nur eine der oben näher umschriebenen Grossen bezüglich Abmessungen, Temperaturen, Drücke und/oder Kräfte gemessen und vorzugsweise programmgesteuert ausgewertet werden. In principle, only one of the sizes described in more detail above with regard to dimensions, temperatures, pressures and / or forces could be measured with the sliding closure and preferably evaluated under program control.

Claims

PATENTANSPRÜCHE
1. Verfahren zum Betrieb eines Schiebeverschlusses für metallurgische Gefässe, bei dem der Schiebeverschluss .(10, 40) wenigstens zwei gegeneinander verspannbare feuerfeste Verschlussplatten (21 , 22, 41 , 42) aufweist, welche jeweils in einem Gehäuseteil (17, 19, 47, 49) gegeneinander verschiebbar angeordnet sind, wobei für die Verspannung der Verschlussplatten (21 , 22, 41 , 42) Federelemente (23) in wenigstens einem der Gehäuseteile (17, 19, 47, 49) enthalten sind, und die eine Verschlussplatte (22, 42) mit ihrem Gehäuseteil (19, 49) von einem Antriebsorgan in eine Schliess- bzw. Offenstellung verschoben werden kann, dadurch gekennzeichnet, dass eine off- und/oder online Diagnose des Betriebszustandes insbesondere im Bereich der Verschlussplatten (21 , 22, 41 , 42) durchgeführt wird, bei der beim Schiebeverschluss (10, 40) eine oder mehrere Grossen bezüglich Abmessungen, Temperaturen, Drücke und/oder Kräfte gemessen und unmittelbar oder unter Einbezug von zusätzlichen relevanten Prozessparametern ausgewertet werden, um über den betrieblichen Zustand und demzufolge über einen weiteren Einsatz des Schiebeverschlusses (10, 40) befinden zu können. 1. Method for operating a sliding closure for metallurgical vessels, in which the sliding closure (10, 40) has at least two fire-resistant closure plates (21, 22, 41, 42) that can be braced against each other, each of which is located in a housing part (17, 19, 47, 49) are arranged so as to be displaceable relative to one another, spring elements (23) being contained in at least one of the housing parts (17, 19, 47, 49) for bracing the closure plates (21, 22, 41, 42), and the one closure plate (22, 42) can be moved with its housing part (19, 49) by a drive element into a closed or open position, characterized in that an off- and / or online diagnosis of the operating state, in particular in the area of the closure plates (21, 22, 41, 42) is carried out in which one or more gauges are measured in terms of dimensions, temperatures, pressures and / or forces in the sliding closure (10, 40) and directly or with the inclusion of additional rel Relevant process parameters are evaluated in order to be able to determine the operational status and consequently the use of the slide lock (10, 40).
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Abmessung die Distanz (53) der jeweils eine Verschlussplatte (21 , 22, 41 , 42) aufnehmenden Gehäuseteile (17, 19, 47, 49) zueinander in Richtung quer zu den Platten-Gleitflächen ermittelt und an eine Auswerteeinheit (20) geleitet wird, wobei diese Distanz (53) vorzugsweise an mehreren Stellen gemessen wird.2. The method according to claim 1, characterized in that the distance (53) of the housing parts (17, 19, 47, 49) receiving a respective closure plate (21, 22, 41, 42) to one another in the direction transverse to the plate Sliding surfaces are determined and sent to an evaluation unit (20), this distance (53) preferably being measured at several points.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass als zu messende Grosse der Druck des Antriebsorganes (25) sowie die Hubposition der verschiebbaren Verschlussplatte (22, 42) ermittelt und ausgewertet wird, woraus insbesondere auf die Reibungsverhältnisse und damit auf den Zustand der Verschlussplatten (21 , 22, 41 , 42) bei ihren sich gegenseitig berührenden Gleitflächeh (41 ', 42') geschlossen werden kann.3. The method according to claim 1 or 2, characterized in that as the variable to be measured, the pressure of the drive member (25) and the stroke position of the displaceable closure plate (22, 42) is determined and evaluated, from which in particular on the friction conditions and thus on the condition the closure plates (21, 22, 41, 42) can be closed with their mutually contacting sliding surfaces (41 ', 42').
4. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Temperaturen bei den Gehäuseteilen (17, 19, 47, 49) , bei den Verschlussplatten (21., 22, 41 , 42) und/oder an anderen Stellen gemessen und ausgewertet werden.4. The method according to any one of the preceding claims 1 to 3, characterized in that the temperatures at the housing parts (17, 19, 47, 49), at the closure plates (21st, 22, 41, 42) and / or at other points be measured and evaluated.
5. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Anpressdruck der die Verschlussplatten (21 , 22, 41 , 42) verspannenden Federelemente (23) gemessen wird, um festzustellen, ob eines oder mehrere der Federelemente (23) nicht mehr funktionstüchtig ist.5. The method according to any one of the preceding claims 1 to 4, characterized in that the contact pressure of the spring elements (23) bracing the closure plates (21, 22, 41, 42) is measured in order to determine whether one or more of the spring elements (23) is no longer functional.
6. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass bei der Auswertung die als Istwerte gemessenen Grossen mit einem Sollwert oder einem Sollwertbereich verglichen werden und bei Vorliegen von Abweichungen ausserhalb der Toleranzgrenze eine Anzeige oder dergleichen für eine Überprüfung oder ein Notschliessen des Schiebeverschlusses (10, 40) erfolgt, oder ein weiterer Einsatz desselben verhindert wird.6. The method according to any one of the preceding claims 1 to 5, characterized in that during the evaluation, the variables measured as actual values are compared with a target value or a target value range and, if there are deviations outside the tolerance limit, a display or the like for a check or Emergency closing of the slide lock (10, 40) takes place, or further use of the same is prevented.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass der Sollwert oder der Sollwertbereich der zu messenden Grossen während der Einsatzdauer der Verschlussplatten (21 , 22, 41 , 42) durch die Prozessparameter angepasst wird, bei dem der Verschleiss bei ihren Gleitflächen bzw. bei ihren Durchflussöffnungen und/oder Temperaturveränderungen miteinbezogen wird.7. The method according to claim 6, characterized in that the target value or the target value range of the sizes to be measured during the period of use of the closure plates (21, 22, 41, 42) is adjusted by the process parameters in which the wear on their sliding surfaces or their flow openings and / or temperature changes are included.
8. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine Protokollierung und eine Speicherung der gemessenen Grossen des Schiebeverschlusses (10, 40), Angaben über die Pfanne, die abzugiessende Schmelze im Hinblick auf Temperatur, Behandlung, Giesszeit, etc. durchgeführt wird, die als Prozessparameter definiert und bei der Bestimmung der Sollwerte mitberücksichtigt werden.8. The method according to any one of the preceding claims 1 to 7, characterized in that logging and storage of the measured sizes of the slide closure (10, 40), information about the pan, the melt to be poured with regard to temperature, treatment, casting time, etc . is carried out, which are defined as process parameters and taken into account when determining the setpoints.
9. Schiebeverschluss insbesondere zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, dass für eine off- und/oder online Diagnose des Betriebszustandes insbesondere im Bereich der Verschlussplatten (21 , 22, 42, 42) eine oder mehrere Messsonden oder dergleichen bei den Gehäuseteilen (17, 19, 47, 49), beim Antriebsorgan (25) und/oder an anderen Stellen enthalten sind, mittels denen Abmessungen, Temperaturen, Drücke und/oder Kräfte gemessen und anschliessend ausgewertet werden. . 9. Sliding closure, in particular for carrying out the method according to one of the preceding claims 1 to 8, characterized in that one or more measuring probes for an offline and / or online diagnosis of the operating state, in particular in the region of the closure plates (21, 22, 42, 42) or the like are contained in the housing parts (17, 19, 47, 49), in the drive element (25) and / or in other places, by means of which dimensions, temperatures, pressures and / or forces are measured and then evaluated. ,
10. Schiebeverschluss nach Anspruch s, dadurch gekennzeichnet, dass die Gehäuseteile (47, 49) mit wenigstens einer Messsonde (50) bzw. einem dazugehörigen Messelement (52) ausgestattet sind, mittels welchen als Abmessung eine Distanz (53) der beiden Gehäuseteile zueinander in Richtung quer zu den Platten-Gleitflächen (41 ', 42') ermittelt und jeweils über eine an die Auswerteeinheit (20) geleitet wird. 10. Sliding closure according to claim s, characterized in that the housing parts (47, 49) are equipped with at least one measuring probe (50) or an associated measuring element (52), by means of which a distance (53) of the two housing parts from one another in dimension Direction transverse to the plate sliding surfaces (41 ', 42') is determined and in each case is passed to the evaluation unit (20).
EP03720347A 2002-03-25 2003-03-22 Method for operating a sliding gate and sliding gate Expired - Lifetime EP1485219B1 (en)

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CH5132002 2002-03-25
CH5132002 2002-03-25
PCT/EP2003/003006 WO2003080274A1 (en) 2002-03-25 2003-03-22 Method for operating a sliding gate, and sliding gate

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KR (1) KR101005647B1 (en)
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WO2003080274A1 (en) 2003-10-02
DE50312185D1 (en) 2010-01-14
US20050242094A1 (en) 2005-11-03
AU2003223976A1 (en) 2003-10-08
JP2005536349A (en) 2005-12-02
CN1642679A (en) 2005-07-20
EP1485219B1 (en) 2009-12-02
ATE450331T1 (en) 2009-12-15
ES2337671T3 (en) 2010-04-28

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