EP1602423B1 - Coupling for attaching a metallurgical vessel to treatment gas pipes - Google Patents

Coupling for attaching a metallurgical vessel to treatment gas pipes Download PDF

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Publication number
EP1602423B1
EP1602423B1 EP05090028A EP05090028A EP1602423B1 EP 1602423 B1 EP1602423 B1 EP 1602423B1 EP 05090028 A EP05090028 A EP 05090028A EP 05090028 A EP05090028 A EP 05090028A EP 1602423 B1 EP1602423 B1 EP 1602423B1
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EP
European Patent Office
Prior art keywords
coupling
gas
coupling part
gas outlet
closing element
Prior art date
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Not-in-force
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EP05090028A
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German (de)
French (fr)
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EP1602423A1 (en
Inventor
Armin Burau
Matthias Dr. Weinberg
Andreas Koschinski
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Vodafone GmbH
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Mannesmannroehren Werke AG
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Publication of EP1602423A1 publication Critical patent/EP1602423A1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling

Definitions

  • the invention relates to a coupling for coupling a metallurgical vessel, in particular a steel ladle, to at least two spatially arranged gas purging lines of a ladle purging device according to the preamble of patent claim 1.
  • a coupling with a closing element designed as a spring-actuated valve is known, which allows the simultaneous coupling of the ladle to two different stationary gas flushing lines of a ladle rinsing device.
  • the essentially cylindrical coupling consists of a first (upper) coupling part arranged on the ladle and a second (lower) coupling part connected to the gas flushing lines.
  • the lower coupling part has in the head area a detachable for maintenance and repair purposes coupling head, in which a first central gas outlet is provided for a gas flow.
  • a second gas outlet opens into a plurality of circular outlets distributed around the central outlet.
  • the upper coupling part has complementary to the gas outlets of the lower coupling part formed and connectable thereto gas inlets, being arranged around the contact points between the outputs and inlets a ring seal, which is intended to prevent escape of or mixing of the gas in the coupled state.
  • the gas outlets on the coupling head are connected via gas outlet ducts sealed against each other with gas flushing pipes, which in turn are connected to a gas supply.
  • the mutual sealing of the gas outlet channels is important in order to avoid “short circuits" in the gas flow, which would disturb the rinsing process in the ladle.
  • the valve in the region of the second (lateral) gas outlet, the valve is provided with a plurality of elastic sealing elements for sealing to the central outlet and to the outside.
  • the spring-actuated valve is designed as a tandem valve with a double cone seat for opening or closing the gas supply from the two Gas Jardin effeten in the gas outlets.
  • the valve is designed to simultaneously open the gas outlets through the tandem valve so that the gas can flow under high pressure from the gas purge lines through the gas exhaust ports through the gas outlets of the coupling head in the lower coupling part to the gas inlets of the upper coupling part ,
  • a high gas pressure is required to overcome the ferrostatic pressure of the liquid column in the steel ladle.
  • the object of the invention is to provide a coupling for coupling a metallurgical vessel, in particular a Stahlg screenpfanne, which is simpler and less expensive in construction and less susceptible to wear.
  • At least one closing element in a gas outlet and at least one other closing element outside the second coupling part are arranged in the proposed coupling in the second coupling part at least in the part of the gas supply, which is connected to the permanently open gas outlet or gas outlets.
  • the closing element is advantageously designed as a spring-actuated valve, which is arranged only in the central outlet channel of the lower coupling part, wherein the other outlet channel remains permanently open.
  • the release or blocking of the gas supply to the permanently open outlet channel is regulated by the arrangement of a further closing element outside the lower coupling part in the gas supply to the lower coupling part.
  • a major advantage of this coupling is that now can be dispensed with a laboriously manufactured spring-operated tandem valve with double-cone seat and only for the first central gas outlet a no further seals exhibiting valve is needed.
  • the coupling is thus much simpler and cheaper to build, with a significant increase in the service life is advantageously achieved by reducing the wearing parts in the clutch beyond.
  • the closing element is arranged separately from the clutch only in the gas supply to the lower coupling part, which simultaneously releases or closes the gas flow to the gas flushing lines.
  • the closing element can be arranged both in the gas supply of each gas purging line, but it is also possible with only one closing element in a common gas supply to release all gas purging simultaneously or close.
  • the closing element for the gas supply in the gas supply to the clutch is arranged, so that the time for opening or closing the gas supply in advantageous manner can be chosen freely.
  • the gas flow is released only when the coupling process is completed, ie the sealing contacting of the coupling parts has taken place.
  • a brief opening of the gas supply before coupling for example, always be useful if there is a risk that in the open gas outlet ducts penetrating dirt could lead to blockages. Due to the short-term gas emission, the outlet channels are blown freely, so that a trouble-free gas flow through the coupling into the steel ladle can be ensured.
  • This improved coupling is characterized by a further significant reduction in the number of parts with a corresponding cost reduction compared to the coupling with a closing element in the lower coupling part, whereby by avoiding possible damage from the gas flow prior to contacting the coupling parts, the reliability is simultaneously increased significantly.
  • FIG. 1 shows a detail of a vertical section through an inventive substantially cylindrically shaped coupling for coupling a steel ladle to at least two stationary arranged gas purging a Pfannen Hughes gear, wherein the two coupling parts are shown in a non-coupled position.
  • coupling which has only one valve in the lower coupling part.
  • the lower coupling part 2 is fixedly arranged in the recording device for the ladle, also not shown, that by a vertical lowering movement of the ladle into the receiving device, the coupling parts 1, 2 moved towards each other and can be automatically coupled together in the correct position.
  • the upper coupling part 1 is recessed trough-shaped in the coupling region and the lower coupling part 2 complementary to essentially conical, so that on the resulting positive guidance, the coupling parts 1, 2 automatically align even in inaccurate alignment to the correct position to each other.
  • the upper coupling part 1 has a central gas inlet channel 12 and an annular gas inlet channel 13 arranged around the gas inlet channel 12, which opens into a plurality of partial inlets 16 in the coupling region.
  • the lower coupling part 2 has a complementary to the trough-shaped coupling portion of the upper coupling part 1 substantially conical coupling head 11, with in the coupling region to the gas inlet channels 12, 13 connectable gas outlets 5, 6, sealingly arranged in the coupling region seals 7, 7 'with each other are connected.
  • the coupling head 11 is detachably connected to the lower coupling part 2 for maintenance purposes with screws 17 and seals 8, 8 'provided in the connection area.
  • the central gas outlet 5 is connected via the gas outlet channel 4 with the Gas Jardintechnisch 10 and the partial outlets 6 via the gas outlet channel 4 'with the Gas Meeting effet 10'.
  • the coupling head 11 only has one in the central gas outlet 5 arranged with a spring 9 during the coupling operation to be actuated valve 3, which in the unopened state via a conical seat in the coupling head 11, the central gas outlet 5 to the gas outlet channel 4 and the gas purging 10 seals.
  • the further gas outlet 6 is now permanently open without a valve.
  • the gas outlet channels 4, 4 ' are gas-tightly separated from one another by means of a weld seam 15 via a sealing plug 14 arranged in the former valve region, so that the gas streams are permanently separated from one another.
  • the lower coupling part 2 can be designed with the elimination of a valve from the outset with completely separate gas outlet channels 4, 4 ', whereby the welding of a sealing plug 14 is omitted.
  • the axially movable valve 3 is arranged in the central gas outlet 5 and protrudes in the non-coupled state beyond the contour of the coupling head 11, so that when the axial movement of the coupling parts 1, 2, the valve 3 opens before the sealing contact of the coupling parts 1, 2 ,
  • the purge gas can flow via the gas purge line 10 through the gas outlet channel 4 into the central gas outlet 5.
  • the common gas supply is opened via a further outside the coupling part 2 in the gas supply of the gas flushing lines 4, 4 'arranged closing element, so that the purge gas through the Gas Jardintechnisch 10, 10' through the gas outlet channel 4, 4 'to the central gas outlet. 5 and can flow to the Operaauslässen 6 in the coupling head 11.
  • valve 3 When uncoupling the spring 9 of the valve 3 is relieved again, the valve 3 closes the central gas outlet 5 in the coupling head 11 again, at the same time the gas supply to the gas outlets via the closing element in the gas supply is closed again.
  • FIG 2 a coupling according to the invention is shown, which does not require valve in the lower coupling part and thus very inexpensive to manufacture and also wear and thus low maintenance.
  • the outer structure of the coupling is substantially identical to the representation in Figure 1 , so that a detailed description is omitted.
  • the closing element for the gas flow is now arranged separately from the clutch only in the gas supply to the lower coupling part 2, which simultaneously releases or closes the gas flow to the gas purging 10, 10 '.
  • the closing element can be arranged both in the gas supply of each gas purging line 10, 10 ', but it is also possible with only one closing element in a common gas supply all Gas Skype utilizaten 10, 10' simultaneously release or close.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Lift Valve (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A coupling for a metallurgical vessel, especially a steel casting ladle with two gas scavenging lines, a pan-shaped first (1) and second (2) coupling part with two gas inlet channels, gas exit channels, a locking element in the ladle scavenging device for controlling the blocking or unblocking of the gas flow, where part (2) includes a locking element in each gas exit and a further locking element outside part (2) and in the gas flow and connected to a permanently open gas inlet or outlet. An independent claim is included for a method coupling a metallurgical vessel to gas scavenging lines.

Description

Die Erfindung betrifft eine Kupplung zum Ankuppeln eines metallurgischen Gefäßes, insbesondere Stahlgießpfanne, an mindestens zwei ortsfest angeordnete Gasspülleitungen einer Pfannenspüleinrichtung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a coupling for coupling a metallurgical vessel, in particular a steel ladle, to at least two spatially arranged gas purging lines of a ladle purging device according to the preamble of patent claim 1.

Aus der LU 87868 A ist eine Kupplung mit einem als federbetätigten Ventil ausgebildeten Schließelement bekannt, die das gleichzeitige Ankuppeln der Gießpfanne an zwei verschiedene ortsfest angeordnete Gasspülleitungen einer Pfannenspüleinrichtung ermöglicht.From the LU 87868 A, a coupling with a closing element designed as a spring-actuated valve is known, which allows the simultaneous coupling of the ladle to two different stationary gas flushing lines of a ladle rinsing device.

Die im Wesentlichen zylindrisch ausgebildete Kupplung besteht aus einem an der Gießpfanne angeordneten ersten (oberen) Kupplungsteil und einem an die Gasspülleitungen angeschlossenen zweiten (unteren) Kupplungsteil.The essentially cylindrical coupling consists of a first (upper) coupling part arranged on the ladle and a second (lower) coupling part connected to the gas flushing lines.

Das untere Kupplungsteil weist im Kopfbereich einen zu Wartungs- und Instandhaltungszwecken lösbaren Kupplungskopf auf, in dem ein erster zentraler Gasauslass für einen Gasstrom vorgesehen ist. Ein zweiter Gasauslass mündet in mehreren kreisförmig um den zentralen Auslass verteilt angeordnete Teilauslässen.The lower coupling part has in the head area a detachable for maintenance and repair purposes coupling head, in which a first central gas outlet is provided for a gas flow. A second gas outlet opens into a plurality of circular outlets distributed around the central outlet.

Das obere Kupplungsteil hat komplementär zu den Gasauslässen des unteren Kupplungsteils ausgebildete und hieran anschließbare Gaseinlässe, wobei um die Kontaktstellen zwischen den Aus- und Einlässen eine Ringdichtung angeordnet ist, die im zusammengekuppelten Zustand ein Entweichen bzw. Vermischen des Gases verhindern soll.The upper coupling part has complementary to the gas outlets of the lower coupling part formed and connectable thereto gas inlets, being arranged around the contact points between the outputs and inlets a ring seal, which is intended to prevent escape of or mixing of the gas in the coupled state.

Die Gasauslässe am Kupplungskopf sind über gegeneinander abgedichtete Gasauslasskanäle mit Gasspülleitungen verbunden, die ihrerseits an eine Gaszuführung angeschlossen sind. Die gegenseitige Abdichtung der Gasauslasskanäle ist wichtig, um "Kurzschlüsse" im Gasstrom zu vermeiden, die den Spülvorgang in der Gießpfanne stören würden. Dazu ist im Bereich des zweiten (seitlichen) Gasauslasses das Ventil mit mehreren elastischen Dichtelementen zur Abdichtung zum zentralen Auslass sowie nach außen versehen.The gas outlets on the coupling head are connected via gas outlet ducts sealed against each other with gas flushing pipes, which in turn are connected to a gas supply. The mutual sealing of the gas outlet channels is important in order to avoid "short circuits" in the gas flow, which would disturb the rinsing process in the ladle. For this purpose, in the region of the second (lateral) gas outlet, the valve is provided with a plurality of elastic sealing elements for sealing to the central outlet and to the outside.

Das federbetätigte Ventil ist als Tandemventil ausgeführt mit einem Doppelkegelsitz für das Öffnen bzw. Schließen der Gaszufuhr aus den beiden Gasspülleitungen in die Gasauslässe.The spring-actuated valve is designed as a tandem valve with a double cone seat for opening or closing the gas supply from the two Gasspülleitungen in the gas outlets.

Das Ventil ist so ausgelegt, dass im zusammengekuppelten Zustand die Gasauslässe über das Tandemventil gleichzeitig geöffnet werden, so dass das Gas, unter hohem Druck stehend von den Gasspülleitungen über die Gasauslasskanäle durch die Gasauslässe des Kupplungskopfes im unteren Kupplungsteil in die Gaseinlässe des oberen Kupplungsteils strömen kann.The valve is designed to simultaneously open the gas outlets through the tandem valve so that the gas can flow under high pressure from the gas purge lines through the gas exhaust ports through the gas outlets of the coupling head in the lower coupling part to the gas inlets of the upper coupling part ,

Ein hoher Gasdruck ist erforderlich, um den ferrostatischen Druck der Flüssigkeitssäule in der Stahlgießpfanne zu überwinden.A high gas pressure is required to overcome the ferrostatic pressure of the liquid column in the steel ladle.

Das Ankuppeln der Gießpfanne an die Gasspülleitungen geschieht dabei in folgenden Schritten:

  • axiales Zusammenführen des ersten und des zweiten Kupplungsteils,
  • ventilbetätigtes Öffnen beider Gasauslässe des zweiten Kupplungsteils während des An- kupplungsvorganges,
  • Abdichten der einzelnen Übergänge zwischen den jeweiligen Gasaus- und Gaseinlässen nach Beendigung des Ankupplungsvorganges.
The coupling of the ladle to the gas scavenging lines takes place in the following steps:
  • axial merging of the first and second coupling parts,
  • valve-operated opening of both gas outlets of the second coupling part during the coupling process,
  • Sealing the individual transitions between the respective gas outlet and gas inlets after completion of the Ankupplungsvorganges.

Diese vorgenannte Kupplung hat mehrere Nachteile. Die Ausführung als federbetätigtes Tandemventil mit zwei Kegelsitzen und den elastischen Dichtelementen ist aufwändig und teuer in der Herstellung und bei den in einem Stahlwerk herrschenden rauhen Umgebungsbedingungen (Temperatur, Schmutz) hohen Beanspruchungen und damit hohem Verschleiß ausgesetzt.This aforementioned coupling has several disadvantages. The design as a spring-actuated tandem valve with two conical seats and the elastic sealing elements is complex and expensive to manufacture and at the prevailing in a steelworks harsh environmental conditions (temperature, dirt) high stresses and thus exposed to high wear.

Die elastischen Dichtungen werden durch die hohen Temperaturen schnell hart und spröde und verlieren dadurch ihre dichtende Funktion. Bei dem unter hohem Druck stehenden Spülgas führt dies zu den oben beschriebenen "Kurzschlüssen" im Gasstrom und damit zu einer Verminderung der Spülintensität.The elastic seals quickly become hard and brittle due to the high temperatures, thereby losing their sealing function. In the purge gas under high pressure, this leads to the above-described "short circuits" in the gas flow and thus to a reduction in the flushing intensity.

Dies bedeutet einen vorzeitigen Ausfall und Instandsetzung der Kupplung, wobei eine Instandsetzung durch die vielen zu demontierenden Bauelemente aufwändig und teuer ist.This means premature failure and repair of the clutch, with a repair by the many components to be disassembled consuming and expensive.

Weiterhin kann es beim Ausfall der Dichtungen zu unkontrolliertem Entweichen des Spülgases in die Umgebung kommen, wodurch einerseits die Spülleistung verringert wird, und andererseits teures Spülgas ungenutzt entweicht.Furthermore, it can lead to uncontrolled escape of the purge gas in the environment in case of failure of the seals, which on the one hand, the flushing power is reduced, and on the other hand expensive purge gas escapes unused.

Aufgabe der Erfindung ist es, eine Kupplung zum Ankuppeln eines metallurgischen Gefäßes, insbesondere einer Stahlgießpfanne, anzugeben, die einfacher und kostengünstiger im Aufbau und weniger verschleißanfällig ist.The object of the invention is to provide a coupling for coupling a metallurgical vessel, in particular a Stahlgießpfanne, which is simpler and less expensive in construction and less susceptible to wear.

Diese Aufgabe wird ausgehend vom Oberbegriff in Verbindung mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst. Vorteilhafte Weiterbildungen sowie ein Verfahren zum Ankuppeln sind Gegenstand von Unteransprüchen.This object is achieved starting from the preamble in conjunction with the characterizing features of claim 1. Advantageous developments and a method for coupling are the subject of dependent claims.

Nach der Lehre der Erfindung wird bei der vorgeschlagenen Kupplung im zweiten Kupplungsteil höchstens ein Schließelement in einem Gasauslass und mindestens ein weiteres Schließelement außerhalb des zweiten Kupplungsteils zumindest in dem Teil der Gaszuführung angeordnet, das mit dem permanent offenen Gasauslass bzw. den Gasauslässen verbunden ist.According to the teachings of the invention, at least one closing element in a gas outlet and at least one other closing element outside the second coupling part are arranged in the proposed coupling in the second coupling part at least in the part of the gas supply, which is connected to the permanently open gas outlet or gas outlets.

Betriebliche Versuche haben gezeigt, dass eine wesentliche Standzeiterhöhung der Kupplung erreicht werden kann, wenn anstatt eines mit vielen Dichtungen versehenen Tandemventils nur noch ein Schließelement im zweiten (unteren) Kupplungsteil verwendet wird.Operational tests have shown that a substantial increase in the service life of the clutch can be achieved if, instead of a tandem valve provided with many seals, only one closing element in the second (lower) coupling part is used.

Das Schließelement ist vorteilhaft als federbetätigtes Ventil ausgebildet, welches nur im zentralen Auslasskanal des unteren Kupplungsteils angeordnet ist, wobei der andere Auslasskanal permanent geöffnet bleibt.The closing element is advantageously designed as a spring-actuated valve, which is arranged only in the central outlet channel of the lower coupling part, wherein the other outlet channel remains permanently open.

Die Freigabe bzw. Sperrung der Gaszufuhr zum permanent geöffneten Auslasskanal wird über die Anordnung eines weiteren Schließelementes außerhalb des unteren Kupplungsteils in der Gaszuführung zum unteren Kupplungsteil geregelt.The release or blocking of the gas supply to the permanently open outlet channel is regulated by the arrangement of a further closing element outside the lower coupling part in the gas supply to the lower coupling part.

Ein wesentlicher Vorteil dieser Kupplung ist, dass nunmehr auf ein aufwändig hergestelltes federbetätigtes Tandemventil mit Doppelkegelsitz verzichtet werden kann und nur noch für den ersten zentralen Gasauslass ein keine weiteren Dichtungen aufweisendes Ventil benötigt wird.A major advantage of this coupling is that now can be dispensed with a laboriously manufactured spring-operated tandem valve with double-cone seat and only for the first central gas outlet a no further seals exhibiting valve is needed.

Durch den Wegfall eines Ventils im Bereich des zweiten Gasauslasses kann nun ebenfalls auf die elastischen Dichtelemente zur gegenseitigen Abdichtung der Gasauslasskanäle verzichtet werden.By eliminating a valve in the region of the second gas outlet can now be dispensed with the elastic sealing elements for mutual sealing of the gas outlet channels.

Die Kupplung wird somit wesentlich einfacher und kostengünstiger im Aufbau, wobei durch die Reduzierung der Verschleißteile in der Kupplung darüber hinaus vorteilhaft eine erhebliche Steigerung der Standzeit erreicht wird.The coupling is thus much simpler and cheaper to build, with a significant increase in the service life is advantageously achieved by reducing the wearing parts in the clutch beyond.

Die Vorteile der erfindungsgemäßen Kupplung können sowohl bei einer Neukonstruktion, wie auch bei der nach dem Stand der Technik bekannten Kupplung realisiert werden.The advantages of the coupling according to the invention can be realized both in a new construction as well as in the coupling known from the prior art.

Bei einer Neukonstruktion der Kupplung können unter Verwendung nur noch eines Ventils von vornherein gasdicht voneinander getrennte Gasauslasskanäle vorgesehen werden.In a redesign of the clutch can be provided from the outset gas-tight separate gas outlet channels using only one valve.

Es ist aber auch möglich, die nach dem Stand der Technik bekannte Kupplung mit Tandemventil kostengünstig auf nur noch ein Ventil umzurüsten. Dabei wird nach Wegfall eines Ventils die Abdichtung zwischen dem zentralen und dem weiteren Gasauslasskanal sowie nach außen nunmehr durch einen im ehemaligen Ventilraum angeordneten gasdicht eingeschweißten metallischen Dichtstopfen realisiert, der keinem Verschleiß unterliegt und damit auch keine Wartung benötigt.But it is also possible to inexpensively convert the known with the prior art coupling with tandem valve to only one valve. Here, after removal of a valve, the seal between the central and the other gas outlet and outward now realized by a valve disposed in the former gas-tight welded metallic sealing plug, which is not subject to wear and thus requires no maintenance.

Der bereits beschriebene Lösungsansatz zur Vereinfachung der erfindungsgemäßen Kupplung kann noch weiter verbessert werden, wenn gemäß dem Merkmal des Anspruches 5 auf die Anordnung eines Schließelementes im unteren Kupplungsteil vollständig verzichtet wird.The already described approach for simplifying the coupling according to the invention can be further improved if, according to the feature of claim 5, the arrangement of a closing element in the lower coupling part is completely dispensed with.

Das Schließelement ist separat von der Kupplung nur noch in der Gaszuführung zum unteren Kupplungsteil angeordnet, welches den Gaszufluss an die Gasspülleitungen gleichzeitig freigibt oder schließt. Das Schließelement kann sowohl in der Gaszuführung jeder Gasspülleitung angeordnet sein, es ist aber auch möglich mit nur einem Schließelement in einer gemeinsamen Gaszuführung alle Gasspülleitungen gleichzeitig freizugeben oder zu schließen.The closing element is arranged separately from the clutch only in the gas supply to the lower coupling part, which simultaneously releases or closes the gas flow to the gas flushing lines. The closing element can be arranged both in the gas supply of each gas purging line, but it is also possible with only one closing element in a common gas supply to release all gas purging simultaneously or close.

Die betriebliche Praxis hat gezeigt, dass bei der bekannten Kupplung während des Ankuppelns, d. h. schon vor der abdichtenden Kontaktierung der Kupplungsteile, durch das Öffnen des Ventils ein starker Gasstrom auf das obere muldenförmige Kupplungsteil gerichtet ist. Die im oberen Kupplungsteil im Kupplungsbereich angeordneten Dichtelemente werden durch diesen Gasstrom stark beansprucht mit der Folge eines frühzeitigen Ausfalls.Operational practice has shown that in the known coupling during coupling, d. H. even before the sealing contact of the coupling parts, by opening the valve, a strong gas flow is directed to the upper trough-shaped coupling part. The arranged in the upper coupling part in the coupling region sealing elements are heavily stressed by this gas flow with the result of premature failure.

Erfindungsgemäß ist deshalb das Schließelement für die Gaszufuhr in der Gaszuführung zur Kupplung angeordnet, so dass der Zeitpunkt zum Öffnen oder Schließen der Gaszufuhr in vorteilhafter Weise frei gewählt werden kann. Vorteilhaft wird der Gasfluss erst freigegeben, wenn der Kupplungsvorgang abgeschlossen, d. h. die abdichtende Kontaktierung der Kupplungsteile erfolgt ist.According to the invention, therefore, the closing element for the gas supply in the gas supply to the clutch is arranged, so that the time for opening or closing the gas supply in advantageous manner can be chosen freely. Advantageously, the gas flow is released only when the coupling process is completed, ie the sealing contacting of the coupling parts has taken place.

In einer erfindungsgemäßen Weiterbildung kann auch vorgesehen werden, vor Beginn des eigentlichen Kupplungsvorgangs die Gaszufuhr kurzzeitig zu öffnen. Dieses geschieht vorteilhaft in einer ausreichend großen Entfernung vom oberen Kupplungsteil, so dass die Dichtungen im Kupplungsbereich durch den Gasstrom nicht beschädigt werden können.In a further development according to the invention it can also be provided to open the gas supply briefly before the actual coupling process begins. This is done advantageously at a sufficiently great distance from the upper coupling part, so that the seals in the coupling region can not be damaged by the gas flow.

Ein kurzzeitiges Öffnen der Gaszufuhr vor dem Ankuppeln kann beispielsweise immer dann sinnvoll sein, wenn die Gefahr besteht, dass in die offenen Gasauslasskanäle eindringender Schmutz zu Verstopfungen führen könnte. Durch den kurzzeitigen Gasausstoß werden die Auslasskanäle frei geblasen, so dass ein störungsfreier Gasfluss durch die Kupplung in die Stahlgießpfanne sichergestellt werden kann.A brief opening of the gas supply before coupling, for example, always be useful if there is a risk that in the open gas outlet ducts penetrating dirt could lead to blockages. Due to the short-term gas emission, the outlet channels are blown freely, so that a trouble-free gas flow through the coupling into the steel ladle can be ensured.

Diese verbesserte Kupplung ist durch eine weitere deutliche Reduzierung der Teileanzahl mit entsprechender Kostenreduzierung im Vergleich zur Kupplung mit einem Schließelement im unteren Kupplungsteil gekennzeichnet, wobei durch Vermeiden einer möglichen Beschädigung durch den Gasstrom vor der Kontaktierung der Kupplungsteile, die Betriebssicherheit gleichzeitig deutlich gesteigert wird.This improved coupling is characterized by a further significant reduction in the number of parts with a corresponding cost reduction compared to the coupling with a closing element in the lower coupling part, whereby by avoiding possible damage from the gas flow prior to contacting the coupling parts, the reliability is simultaneously increased significantly.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in den Zeichnungen dargestellten Ausführungsbeispiele. Gleiche Bezugszeichen in unterschiedlichen Figuren bezeichnen gleiche Bauteile. Es zeigen:

Figur 1
Ausschnittweise Darstellung einer erfindungsgemäßen Kupplung mit nur noch einem Ventil im unteren Kupplungsteil,
Figur 2
ausschnittweise Darstellung einer erfindungsgemäßen Kupplung ohne Ventil im unteren Kupplungsteil.
Further features, advantages and details of the invention will become apparent from the following description of the embodiments illustrated in the drawings. Like reference numerals in different figures indicate like components. Show it:
FIG. 1
Sectional representation of a coupling according to the invention with only one valve in the lower coupling part,
FIG. 2
partial representation of a coupling according to the invention without a valve in the lower coupling part.

Figur 1 zeigt ausschnittweise einen senkrechten Schnitt durch eine erfindungsgemäße im Wesentlichen zylindrisch ausgebildete Kupplung für das Ankuppeln einer Stahlgießpfanne an mindestens zwei ortsfest angeordneten Gasspülleitungen einer Pfannenspüleinrichtung, wobei die beiden Kupplungsteile in einer nicht zusammengekuppelten Position gezeigt werden. Zu sehen ist eine erfindungsgemäß umgerüstete Kupplung, die im unteren Kupplungsteil nur noch ein Ventil aufweist. 1 shows a detail of a vertical section through an inventive substantially cylindrically shaped coupling for coupling a steel ladle to at least two stationary arranged gas purging a Pfannenspüleinrichtung, wherein the two coupling parts are shown in a non-coupled position. To see is a retrofitted according to the invention coupling, which has only one valve in the lower coupling part.

Dargestellt sind das an der Stahlgießpfanne befestigte obere Kupplungsteil 1 sowie das an den ortsfesten Gasspülleitungen 10, 10' der Pfannenspüleinrichtung angeordnete untere Kupplungsteil 2. Die Gasspülleitungen sind an eine hier nicht dargestellte gemeinsame Gaszuführung der Pfannenspüleinrichtung angeschlossen.Shown are the attached to the steel ladle upper coupling part 1 and arranged on the stationary Gasspülleitungen 10, 10 'of the pan rinsing lower coupling part 2. The Gasspülleitungen are connected to a common gas supply not shown here the Pfannenspüleinrichtung.

Das untere Kupplungsteil 2 ist in der ebenfalls nicht dargestellten Aufnahmevorrichtung für die Gießpfanne derart ortsfest angeordnet, dass durch eine senkrechte Absenkbewegung der Gießpfanne in die Aufnahmevorrichtung die Kupplungsteile 1, 2 aufeinander zu bewegt und automatisch in der richtigen Position zusammengekuppelt werden können.The lower coupling part 2 is fixedly arranged in the recording device for the ladle, also not shown, that by a vertical lowering movement of the ladle into the receiving device, the coupling parts 1, 2 moved towards each other and can be automatically coupled together in the correct position.

Dazu ist das obere Kupplungsteil 1 im Kupplungsbereich muldenförmig ausgenommen und das untere Kupplungsteil 2 komplementär dazu im Wesentlichen konisch ausgebildet, so dass über die sich ergebende Zwangsführung die Kupplungsteile 1, 2 sich auch bei nicht exakter Fluchtung automatisch in die richtige Position zueinander ausrichten.For this purpose, the upper coupling part 1 is recessed trough-shaped in the coupling region and the lower coupling part 2 complementary to essentially conical, so that on the resulting positive guidance, the coupling parts 1, 2 automatically align even in inaccurate alignment to the correct position to each other.

Das obere Kupplungsteil 1 weist einen zentralen Gaseinlasskanal 12 und einen um den Gaseinlasskanal 12 angeordneten ringförmigen Gaseinlasskanal 13 auf, der im Kupplungsbereich in mehrere Teileinlässe 16 mündet.The upper coupling part 1 has a central gas inlet channel 12 and an annular gas inlet channel 13 arranged around the gas inlet channel 12, which opens into a plurality of partial inlets 16 in the coupling region.

Der untere Kupplungsteil 2 weist einen komplementär zum muldenförmig ausgebildeten Kupplungsbereich des oberen Kupplungsteils 1 im Wesentlichen konisch ausgebildeten Kupplungskopf 11 auf, mit im Kupplungsbereich an die Gaseinlässkanäle 12, 13 anschließbaren Gasauslässen 5, 6, die über im Kupplungsbereich angeordnete Dichtungen 7, 7' abdichtend miteinander verbunden sind.The lower coupling part 2 has a complementary to the trough-shaped coupling portion of the upper coupling part 1 substantially conical coupling head 11, with in the coupling region to the gas inlet channels 12, 13 connectable gas outlets 5, 6, sealingly arranged in the coupling region seals 7, 7 'with each other are connected.

Der Kupplungskopf 11 ist zu Wartungszwecken mit Schrauben 17 und im Anschlussbereich vorgesehenen Dichtungen 8, 8' mit dem unteren Kupplungsteil 2 lösbar verbunden.The coupling head 11 is detachably connected to the lower coupling part 2 for maintenance purposes with screws 17 and seals 8, 8 'provided in the connection area.

Der zentrale Gasauslass 5 ist über den Gasauslasskanal 4 mit der Gasspülleitung 10 und die Teilauslässe 6 über den Gasauslasskanal 4' mit der Gasspülleitung 10' verbunden.The central gas outlet 5 is connected via the gas outlet channel 4 with the Gasspülleitung 10 and the partial outlets 6 via the gas outlet channel 4 'with the Gasspülleitung 10'.

Erfindungsgemäß weist der Kupplungskopf 11 nur noch ein im zentralen Gasauslass 5 angeordnetes mit einer Feder 9 beim Kupplungsvorgang zu betätigendes Ventil 3 auf, welches im nicht geöffneten Zustand über einen Kegelsitz im Kupplungskopf 11 den zentralen Gasauslass 5 zum Gasauslasskanal 4 bzw. zur Gasspülleitung 10 abdichtet. Der weitere Gasauslass 6 ist nunmehr ohne Ventil permanent geöffnet.According to the invention, the coupling head 11 only has one in the central gas outlet 5 arranged with a spring 9 during the coupling operation to be actuated valve 3, which in the unopened state via a conical seat in the coupling head 11, the central gas outlet 5 to the gas outlet channel 4 and the gas purging 10 seals. The further gas outlet 6 is now permanently open without a valve.

Die Gasauslasskanäle 4, 4' sind über einen im ehemaligen Ventilbereich angeordneten Dichtstopfen 14 mittels einer Schweißnaht 15 gasdicht voneinander getrennt, so das die Gasströme dauerhaft voneinander getrennt sind.The gas outlet channels 4, 4 'are gas-tightly separated from one another by means of a weld seam 15 via a sealing plug 14 arranged in the former valve region, so that the gas streams are permanently separated from one another.

Bei einer Neukonstruktion kann, wie oben beschrieben, das untere Kupplungsteil 2 unter Wegfall eines Ventils von vornherein mit völlig getrennten Gasauslasskanälen 4, 4' konzipiert werden, wodurch das Einschweißen eines Dichtungsstopfens 14 entfällt.In a new construction, as described above, the lower coupling part 2 can be designed with the elimination of a valve from the outset with completely separate gas outlet channels 4, 4 ', whereby the welding of a sealing plug 14 is omitted.

Der Ankupplungsvorgang der Gießpfanne an die Gasspülleitungen 10, 11 geschieht wie folgt:The coupling process of the ladle to the gas scavenging lines 10, 11 is done as follows:

Zunächst werden durch Absenken der Gießpfanne das obere 1 und das untere Kupplungsteil 2 zusammengeführt. Das axial bewegliche Ventil 3 ist im zentralen Gasauslass 5 angeordnet und ragt im nicht angekuppelten Zustand über die Kontur des Kupplungskopfes 11 hinaus, so dass sich beim axialen Aufeinanderzubewegen der Kupplungsteile 1, 2 das Ventil 3 schon vor der abdichtenden Kontaktierung der Kupplungsteile 1, 2 öffnet.First, by lowering the ladle, the upper 1 and the lower coupling part 2 are brought together. The axially movable valve 3 is arranged in the central gas outlet 5 and protrudes in the non-coupled state beyond the contour of the coupling head 11, so that when the axial movement of the coupling parts 1, 2, the valve 3 opens before the sealing contact of the coupling parts 1, 2 ,

Über die freigegebene Öffnung des Kegelsitzes kann nach der abdichtenden Kontaktierung das Spülgas über die Gasspülleitung 10 durch den Gasauslasskanal 4 in den zentralen Gasauslass 5 strömen.Via the released opening of the conical seat, after the sealing contact, the purge gas can flow via the gas purge line 10 through the gas outlet channel 4 into the central gas outlet 5.

Nach der abdichtenden Kontaktierung wird über ein weiteres außerhalb des Kupplungsteils 2 in der Gaszuführung der Gasspülleitungen 4, 4' angeordnetes Schließelement die gemeinsame Gaszufuhr geöffnet, so dass das Spülgas über die Gasspülleitung 10, 10' durch den Gasauslasskanal 4, 4' zum zentralen Gasauslass 5 und zu den Teilauslässen 6 im Kupplungskopf 11 strömen kann.After the sealing contact, the common gas supply is opened via a further outside the coupling part 2 in the gas supply of the gas flushing lines 4, 4 'arranged closing element, so that the purge gas through the Gasspülleitung 10, 10' through the gas outlet channel 4, 4 'to the central gas outlet. 5 and can flow to the Teilauslässen 6 in the coupling head 11.

Beim Abkuppeln wird die Feder 9 des Ventils 3 wieder entlastet, wobei das Ventil 3 den zentralen Gasauslass 5 im Kupplungskopf 11 wieder schließt, gleichzeitig wird die Gaszufuhr zu den Gasauslässen über das Schließelement in der Gaszuführung wieder geschlossen.When uncoupling the spring 9 of the valve 3 is relieved again, the valve 3 closes the central gas outlet 5 in the coupling head 11 again, at the same time the gas supply to the gas outlets via the closing element in the gas supply is closed again.

In Figur 2 ist eine erfindungsgemäße Kupplung dargestellt, die ohne Ventil im unteren Kupplungsteil auskommt und damit sehr kostengünstig in der Herstellung und außerdem verschleiß- und damit wartungsarm ist. Der äußere Aufbau der Kupplung ist im Wesentlichen identisch mit der Darstellung in Figur 1, so dass auf eine detaillierte Beschreibung verzichtet wird.In Figure 2 , a coupling according to the invention is shown, which does not require valve in the lower coupling part and thus very inexpensive to manufacture and also wear and thus low maintenance. The outer structure of the coupling is substantially identical to the representation in Figure 1 , so that a detailed description is omitted.

Das Schließelement für den Gasfluss ist nunmehr separat von der Kupplung nur noch in der Gaszuführung zum unteren Kupplungsteil 2 angeordnet, welches den Gaszufluss an die Gasspülleitungen 10, 10' gleichzeitig freigibt oder schließt. Das Schließelement kann sowohl in der Gaszuführung jeder Gasspülleitung 10, 10' angeordnet sein, es ist aber auch möglich mit nur einem Schließelement in einer gemeinsamen Gaszuführung alle Gasspülleitungen 10, 10' gleichzeitig freizugeben oder zu schließen.The closing element for the gas flow is now arranged separately from the clutch only in the gas supply to the lower coupling part 2, which simultaneously releases or closes the gas flow to the gas purging 10, 10 '. The closing element can be arranged both in the gas supply of each gas purging line 10, 10 ', but it is also possible with only one closing element in a common gas supply all Gasspülleitungen 10, 10' simultaneously release or close.

Die Verfahrensweise beim An- und Abkuppeln entspricht im Wesentlichen der bei Figur 1 beschriebenen, jedoch werden die Schließelemente zur Steuerung des Gasflusses nunmehr unabhängig vom eigentlichen Kupplungsvorgang betätigt, so dass der Zeitpunkt zum Öffnen und Schließen der Gaszufuhr in vorteilhafter Weise frei gewählt werden kann.The procedure for coupling and uncoupling essentially corresponds to that described in FIG. 1 , but the closing elements for controlling the gas flow are now actuated independently of the actual coupling process, so that the time for opening and closing the gas supply can be selected freely in an advantageous manner.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Nr.No. Bezeichnungdescription 11 erstes (oberes) Kupplungsteilfirst (upper) coupling part 22 zweites (unteres) Kupplungsteilsecond (lower) coupling part 33 VentilValve 4,4'4,4 ' Gasauslasskanälegas discharge ports 55 zentraler Gasauslasscentral gas outlet 66 TeilauslässeTeilauslässe 7, 7'7, 7 ' Dichtungen (Kupplungsbereich)Seals (coupling area) 8, 8'8, 8 ' Dichtungen (Kupplungskopf)Seals (coupling head) 99 Ventilfedervalve spring 10, 10'10, 10 ' GasspülleitungenGasspülleitungen 1111 Kupplungskopfcoupling head 1212 zentraler Gaseinlasskanalcentral gas inlet duct 1313 ringförmiger Gaseinlasskanalannular gas inlet channel 1414 Dichtstopfensealing plug 1515 SchweißnahtWeld 1616 TeileinlässeTeileinlässe 1717 Schraubenscrew

Claims (6)

  1. A coupling for coupling a metallurgical vessel, in particular a steel casting ladle, to at least two fixed gas scavenging lines of a ladle scavenging means which are connected to a gas supply means, comprising a first coupling part, fastened to the metallurgical vessel, which is formed in a trough-shape in the coupling region and comprises at least two gas inlet ducts, and a second coupling part, connected to the gas scavenging lines and formed complementarily to the trough of the first coupling part in the coupling region, comprising at least two gas outlet ducts which are connectable to the gas inlet ducts of the first coupling part and can be sealed off from each other, one gas outlet duct opening centrally in the coupling region into a gas outlet and a further gas outlet duct opening into partial outlets arranged in a circle around the central duct, and at least one closing element which controls the unblocking or blocking of the gas flow being arranged in the ladle scavenging means,
    characterised in that
    in the second coupling part (2) at most one closing element is arranged in one gas outlet (5, 6) and at least one further closing element is arranged outside the coupling part (2) at least in the part of the gas supply means which is connected to the permanently-open gas outlet or the gas outlets.
  2. A coupling according to Claim 1, characterised in that only the central gas outlet (5) of the second coupling part (2) is provided with a closing element.
  3. A coupling according to Claims 1 and 2, characterised in that the closing element in the coupling part (2) is in the form of a valve (3).
  4. A coupling according to Claim 2, characterised in that the valve (3) is in the form of a valve loaded with a spring (9).
  5. A coupling according to Claim 1, characterised in that a closing element is arranged only in the gas supply means of the gas scavenging lines (10, 10') outside the coupling part (2).
  6. A method for coupling a metallurgical vessel to at least two fixed gas scavenging lines using a coupling according to Claim 5, wherein the first (1) and second (2) coupling parts are moved towards one another and when brought together the transitions between the gas outlet ducts are sealed off and the inflow of scavenging gas is released by actuating the closing element in the coupled state,
    characterised in that
    before the coupling the open gas outlets (5, 6) or the gas outlet ducts (4, 4') are blown free by partially and briefly opening the gas supply means, and after coupling the feed of scavenging gas is opened fully.
EP05090028A 2004-06-02 2005-02-11 Coupling for attaching a metallurgical vessel to treatment gas pipes Not-in-force EP1602423B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004027531A DE102004027531B3 (en) 2004-06-02 2004-06-02 Coupling for metallurgical vessel, especially a steel casting ladle useful for connecting a metallurgical ladle to a gas scavenging line includes a pan-shaped first and second coupling part with two gas inlet channels and gas exit channels
DE102004027531 2004-06-02

Publications (2)

Publication Number Publication Date
EP1602423A1 EP1602423A1 (en) 2005-12-07
EP1602423B1 true EP1602423B1 (en) 2007-03-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05090028A Not-in-force EP1602423B1 (en) 2004-06-02 2005-02-11 Coupling for attaching a metallurgical vessel to treatment gas pipes

Country Status (3)

Country Link
EP (1) EP1602423B1 (en)
AT (1) ATE357984T1 (en)
DE (2) DE102004027531B3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101100727B1 (en) * 2009-11-30 2011-12-29 주식회사 우진 Auto coupler device for preliminary treatment apparatus of molten pig iron

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831647C2 (en) * 1978-07-19 1980-02-21 Mannesmann Demag Ag, 4100 Duisburg Coupling for connecting supply gas lines to metallurgical vessels
LU87082A1 (en) * 1987-12-18 1989-07-07 Wurth Paul Sa DEVICE FOR COUPLING A METALLURGICAL POCKET TO A GAS NETWORK
LU87868A1 (en) * 1990-12-21 1992-08-25 Wurth Paul Sa QUICK DOUBLE FLOW CONNECTION FOR AUTOMATIC AND SIMULTANEOUS COUPLING OF A METALLURGICAL POCKET TO TWO DIFFERENT GAS NETWORKS
LU88595A1 (en) * 1995-03-03 1996-10-04 Wurth Paul Sa Device for automatically coupling a ladle to one or more gas lines
LU88594A1 (en) * 1995-03-03 1996-10-04 Wurth Paul Sa Device for automatically coupling a ladle to one or more gas lines

Also Published As

Publication number Publication date
ATE357984T1 (en) 2007-04-15
EP1602423A1 (en) 2005-12-07
DE502005000516D1 (en) 2007-05-10
DE102004027531B3 (en) 2005-06-09

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