EP0858515A1 - Exchange device for a blow lance - Google Patents

Exchange device for a blow lance

Info

Publication number
EP0858515A1
EP0858515A1 EP96937279A EP96937279A EP0858515A1 EP 0858515 A1 EP0858515 A1 EP 0858515A1 EP 96937279 A EP96937279 A EP 96937279A EP 96937279 A EP96937279 A EP 96937279A EP 0858515 A1 EP0858515 A1 EP 0858515A1
Authority
EP
European Patent Office
Prior art keywords
blowing
blowing lance
coupling head
coolant
receptacle
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
EP96937279A
Other languages
German (de)
French (fr)
Other versions
EP0858515B2 (en
EP0858515B1 (en
Inventor
Hans-Hermann Kempken
Manfred Kompa
Helmut W. Goj
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Thyssen Stahl AG filed Critical Thyssen Stahl AG
Publication of EP0858515A1 publication Critical patent/EP0858515A1/en
Application granted granted Critical
Publication of EP0858515B1 publication Critical patent/EP0858515B1/en
Publication of EP0858515B2 publication Critical patent/EP0858515B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 changing device for a blowing lance, which has a blowing pipe and a cooling jacket which surrounds the blowing pipe and can be flushed with coolant, the inlet and outlet of which are arranged at the end of the blowing lance assigned to a coupling head, the coupling head having a receptacle into which the latter End of the blowing lance is insertable and includes the connections for the coolant supply, the coolant discharge and the blowing fluid supply, the blowing lance being releasably connectable to the coupling head, at least the inlet or the outlet of the cooling jacket opening onto a peripheral surface of the blowing lance and the opening or Outlet is assigned to each associated connection on a side surface of the receptacle assigned to the respective peripheral surface.
  • Blow lances are used, for example, to blow oxygen into a converter during the manufacture of steel.
  • the problem with blowing lances used in this way is that they are worn out after a certain period of use and have to be replaced.
  • the blowing pipe through which the gas blown into the converter is passed, is cooled by means of a coolant, usually water.
  • a coolant usually water.
  • the blowing lances are usually provided with a double jacket, the two interconnected coaxially to each other and to the blowpipe encloses arranged chambers.
  • the coolant is introduced into the first chamber directly adjoining the blowpipe and then flows along the blowpipe up to approximately its tip and from there back through the second chamber to the outlet of the coolant jacket.
  • blowing lances are provided with flanges, to which the relevant lines can be connected in a conventional manner.
  • This type of connection between the supply and discharge lines has the problem when replacing such a blowing lance that a considerable time is required to disconnect and connect the lines.
  • the time required for changing the blowing lance can be shortened with the aid of a device which is described in European patent application EP 0 464 427 A2.
  • the section which is provided in the previously described blowing lances for connecting the supply and discharge lines is assigned to a separate coupling head.
  • the coupling head is attached to a frame, which also includes a hydraulically operated lifting system.
  • the remaining part of the blowing lance can be suspended in the lifting system in such a way that the relevant end of the blowing lance can be inserted into the receptacle of the coupling head.
  • It is both the End opening of the blowpipe and the inlet and outlet of the cooling jacket are arranged on the end face of the blowing lance.
  • the connections for the coolant supply and discharge as well as the blowing fluid supply are arranged on the bottom of the receptacle of the coupling head assigned to the end face of the blowing lance.
  • the hydraulic lifting device keeps the end face of the blowing lance in contact with the bottom surface of the receptacle in order to ensure a constant sealing of the blowing pipe, coolant inlet and outlet.
  • considerable contact forces are required because of the considerable pressure with which the coolant and the blowing fluid are introduced into the blowing lance.
  • a device of the type mentioned at the outset is known from European patent application EP 0 441 767 A2.
  • the connections for the coolant supply and removal of the blowing lance are arranged together with the connection for the blowing fluid on a side fixed plate.
  • the coupling head of the known device with which the blowing lance can be detachably coupled also has a plate on which the connections for the blowing fluid and the coolant are arranged in a corresponding manner.
  • a hydraulically operating device is used to press the connections of the coupling head tightly against the connections of the blowing lance.
  • Pressure devices are required to ensure a permanently tight, safe pressing of the blowing lance to the connections for the coolant supply and the blowing fluid.
  • the object of the invention is, based on the above-described prior art, to provide a changing device for a blowing lance, which enables a blowing lance to be exchanged quickly with low manufacturing and maintenance costs.
  • the blow pipe is interlockingly and tightly connected to a pipe socket of the receptacle, which is connected to the blowing fluid supply, and that when the blow lance is pushed into the receptacle of the coupling head in the area of the connection for the coolant supply and / or Connection for the coolant discharge is formed in each case a chamber, in particular an annular chamber.
  • blow lance and the coupling head makes it possible to seal the individual inputs and outputs of the blow lance by simply pushing the blow lance into the receptacle accomplish.
  • a complicated holding device is no longer required after the blowing lance has been introduced into the receptacle.
  • electrical, hydraulic or pneumatic devices required for the coupling process.
  • a simple coupling mechanism can be used, the sealing means used in the area of the respective sealing surfaces always being sufficient to ensure reliable sealing of the individual connections of the blowing lance during its operation.
  • the invention provides a cost-effective, changeable device which, with high operational reliability, enables the lance to be replaced easily.
  • a chamber in particular an annular chamber, is formed in the region of the connection for the coolant supply and / or the connection for the coolant discharge when the blowing lance is pushed into the receptacle of the coupling head.
  • An embodiment of the invention which is inexpensive both in terms of the installation space required for the coupling head and in terms of the manufacturability of the blowing lance is characterized in that both the inlet and the outlet of the cooling jacket open onto a peripheral surface of the blowing lance.
  • the blowing lance should be used with the Coupling head can be releasably locked.
  • This can be achieved in a simple manner in that the coupling head can be locked with the blowing lance by means of at least one pivotable hook attached to it, the hook automatically moving into its locking position during insertion of the blowing lance into the receptacle of the coupling head.
  • the chamber assigned to the connection for the coolant supply surrounds the free, end face of the end of the blowing lance assigned to the receptacle, the force exerted by the coolant on the lance in the direction of its tip causes the lance to be free of play is held in the hook.
  • a shoulder is formed on the blowing lance and extends into the chamber assigned to the connection for the supply of coolant, to which the coolant exerts a force directed into the receptacle of the coupling head when pressure is applied.
  • the pressure force exerted by the coolant causes the blowing lance to be held in the receptacle.
  • FIG. 1 shows a changing device for a blowing lance in a partial, partially broken frontal view.
  • Fig. 2 shows the change device of Figure 1 in a partial side view.
  • the changing device for a blowing lance 1 shown in the figures has a coupling head 2, which is attached to a frame (not shown) in a height, lateral and angle-adjustable manner via a guide 3.
  • the coupling head 2 has a first connection 4 for a blowing fluid, in particular oxygen, which is arranged on the upper side 5 of the coupling head 2.
  • a pipe insert 6 is fitted into the connection 4 and extends into a receptacle 7 with its end 6a assigned to the inside of the coupling head 2.
  • the receptacle 7 of the coupling head is open to the underside 8 of the coupling head 2.
  • a ring insert 9 is inserted into the receptacle 7 from the underside 8, and its lower section widens in a funnel shape towards the underside 8.
  • a groove 9a is formed, which is provided with a window-like opening 9b.
  • Ring seals 10, 11 are placed in grooves provided for this purpose above and below the ring groove 9a.
  • the opening 9b of the ring insert 9 is assigned to a second connection to which a coolant discharge line, not shown, can be connected.
  • a third connection 13 is arranged above the second connection 12 and also opens into the receptacle 7.
  • a coolant supply line, also not shown here, can be connected to the connection 13.
  • the blowing lance 1 has an internal blowing tube 20, the end section 21 associated with the receptacle 7 of the coupling head 2 is widened and one opposite the Remaining length of the blowpipe has increased wall thickness. With its end section 21, the blowpipe 20 is pushed onto the end section 6a of the pipe insert 6, three ring seals 23 arranged one behind the other in the axial direction of the pipe section 6 ensuring the sealing of the interlocking sections of the pipe insert 6 and the blowpipe 20 from the environment.
  • the blow pipe 20 is inserted into a cooling jacket 30 of the blow lance 1 and is detachably connected to it.
  • the cooling jacket 30 has a partition wall 31 which extends coaxially to the blowpipe 20 and is spaced apart therefrom and through which a first chamber 32 and a second chamber 33 are divided within the cooling jacket 30.
  • Connected to the first chamber 32 of the cooling jacket are inlet openings 34 which are formed at the upper end of the blowing lance 1 assigned to the receptacle 7.
  • the second chamber 33 opens into outlet openings 35, which are formed in the cooling jacket 30, offset from the tip of the blowing lance 1, not shown, below a first sealing surface 36 formed between the inlet openings 34 and the outlet openings 35.
  • the first and second chambers 32, 33 of the cooling jacket are connected to one another in the region of the tip of the blowing lance, not shown, so that the coolant which flows into the first chamber 32 through the inlet openings 34 is conducted along the blowing tube 20 to the tip of the blowing lance 1 and from there it is flushed back through the chamber 33 to the outlet openings 35.
  • the seal 10 of the ring insert 9 lies against the first sealing surface 36 of the blowing lance 1 and seals the annular chamber 40 formed by the annular groove 9a against a second chamber 41 formed in the upper region of the receptacle 7, which with the connection 13 for the Coolant supply is connected.
  • the second chamber 41 of the receptacle 7 surrounds the end face 42 of the blowing lance 1, so that the pressure of the coolant present in the chamber 41 exerts a force in the direction of the tip of the blowing lance 1, not shown.
  • hooks 51 which are pivoted to the side of the coupling head 2 and by means of bolts 50.
  • the hooks 51 engage with their hook-shaped ends 51a around the ends of bolt-like projections 52, which are molded onto a retaining ring 53 which is firmly connected to the blowing lance 1.
  • the hooks 51 have an inclined surface 54 at their lower end.
  • the projections 52 slide on the inclined surfaces 54 while the blowing lance 1 is being pushed into the recess 7, so that the hook 51 is pivoted out of the conveying path 52 until they have passed the tip 55. Then the hook 51 falls back into its starting position.
  • the blowing lance 1 is then pressed into the hook receptacle of the hooks 51 and held there without play.
  • the blowing lance 1 is pushed into the receptacle 7 after the coolant supply has been switched off in the chamber 41 until the hooks 51 can be pivoted freely. After the hooks 51 have been pivoted away, the blowing lance can be pulled out of the receptacle 7 unhindered and replaced by a new blowing lance 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Nozzles (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

The invention relates to an exchange device for a blow lance (1) having a blowpipe (20) and a cooling jacket (30) surrounding the blowpipe (20) and through which coolant can flow, the inlet and outlet (34, 35) of which are arranged at the end of the blow lance (1) allocated to a coupling head (2). The coupling head (2) has an attachment (7) into which this end of the blow lance (1) can be introduced and comprises the connections (4, 12, 13) for the coolant inlet, coolant outlet and blower fluid supply. The blow lance (1) can be releasably coupled to the coupling head, where at least the inlet (34) or the outlet (35) of the coolant jacket (30) open on a circumferential surface of the blow lance (1) and where the connection (12, 13) allocated to the inlet (34) or the outlet (35) is arranged on a side surface of the attachment (7) allocated to the circumferential surface concerned. When the blow lance (1) is inserted into the attachment (7) of the coupling head, the blowpipe (20) is engaged with and tightly secured to a pipe union (6) of the attachment (7) which is connected to the blowing fluid supply. In addition, with the blow lance (1) inserted into the attachment (7) of the coupling head (2), a chamber (40, 41), especially an annular chamber, is formed in the region of the union (12) for the coolant supply and/or the union (12) for the coolant outlet.

Description

Wechselvorrichtung für eine Blaslanze Changing device for a blowing lance
Die Erfindung betrifft eine Wechselvorrichtung für eine Blaslanze, die ein Blasrohr und einen das Blasrohr umgebenden, mit Kühlmittel durchspülbaren Kühlmantel aufweist, dessen Ein- und Auslaß an dem einem Kupplungskopf zugeordneten Ende der Blaslanze angeordnet sind, wobei der Kupplungskopf eine Aufnahme aufweist, in die dieses Ende der Blaslanze einführbar ist und die Anschlüsse für die Kühlmittelzufuhr, die Kühlmittelabfuhr und die Blasfluidzufuhr umfaßt, wobei die Blaslanze lösbar mit dem Kupplungskopf verkoppelbar ist, wobei mindestens der Einlaß oder der Auslaß des Kühlmantels auf eine Umfangsfläche der Blaslanze münden und wobei der dem Einlaß oder Auslaß jeweils zugeordnete Anschluß auf einer der jeweiligen Umfangsfläche zugeordneten Seitenfläche der Aufnahme angeordnet ist.The invention relates to a changing device for a blowing lance, which has a blowing pipe and a cooling jacket which surrounds the blowing pipe and can be flushed with coolant, the inlet and outlet of which are arranged at the end of the blowing lance assigned to a coupling head, the coupling head having a receptacle into which the latter End of the blowing lance is insertable and includes the connections for the coolant supply, the coolant discharge and the blowing fluid supply, the blowing lance being releasably connectable to the coupling head, at least the inlet or the outlet of the cooling jacket opening onto a peripheral surface of the blowing lance and the opening or Outlet is assigned to each associated connection on a side surface of the receptacle assigned to the respective peripheral surface.
Blaslanzen werden eingesetzt, um beispielsweise Sauerstoff in einen Konverter während der Herstellung von Stahl einzublasen. Das Problem bei derart eingesetzten Blaslanzen besteht darin, daß diese nach einer bestimmten Gebrauchsdauer abgenutzt sind und ausgewechselt werden müssen.Blow lances are used, for example, to blow oxygen into a converter during the manufacture of steel. The problem with blowing lances used in this way is that they are worn out after a certain period of use and have to be replaced.
Um eine vorzeitige Beschädigung der Blaslanze durch die im Bereich des Konverters vorhandenen hohen Umgebungstemperaturen zu vermeiden, wird das Blasrohr, durch das das in den Konverter eingeblasene Gas geleitet wird, mittels eines Kühlmittels, zumeist Wasser, gekühlt. Zu diesem Zweck sind die Blaslanzen üblicherweise mit einem Doppelmantel versehen, der zwei miteinander verbundene koaxial zueinander und zu dem Blasrohr angeordnete Kammern umschließt. In die erste, unmittelbar an das Blasrohr angrenzende Kammer wird das Kühlmittel eingeleitet und strömt anschließend entlang dem Blasrohr bis annähernd zu dessen Spitze und von dort durch die zweite Kammer zum Auslaß des Kühlmittelmantels zurück.In order to avoid premature damage to the blowing lance due to the high ambient temperatures in the area of the converter, the blowing pipe, through which the gas blown into the converter is passed, is cooled by means of a coolant, usually water. For this purpose, the blowing lances are usually provided with a double jacket, the two interconnected coaxially to each other and to the blowpipe encloses arranged chambers. The coolant is introduced into the first chamber directly adjoining the blowpipe and then flows along the blowpipe up to approximately its tip and from there back through the second chamber to the outlet of the coolant jacket.
Zum Anschluß der Blasfluid- und Kühlmittelver¬ sorgungsleitung sowie der Kühlmittelabfuhrleitung sind herkömmliche Blaslanzen mit Flanschen versehen, an die die betreffenden Leitungen in herkömmlicher Weise anschließbar sind. Diese Art der Verbindung zwischen den Versorgungs- und Abfuhrleitungen bringt bei einem Auswechseln einer derartiger Blaslanze das Problem mit sich, daß eine erhebliche Zeit für das Lösen und Anschließen der Leitungen erforderlich ist. Darüber hinaus ist es bei derartigen Anschlüssen zwischen den Versorgungs- bzw. Abfuhrleitungen und der Blaslanze nicht möglich, den Auswechselvorgang zu automatisieren. Statt dessen muß in Kauf genommen werden, daß, um eine Gefährdung der mit dem Auswechseln der Blaslanze befaßten Monteure zu vermeiden, der Betrieb der Blaslanze für lange Zeit unterbrochen wird.For the connection of the blowing fluid and coolant supply line as well as the coolant discharge line, conventional blowing lances are provided with flanges, to which the relevant lines can be connected in a conventional manner. This type of connection between the supply and discharge lines has the problem when replacing such a blowing lance that a considerable time is required to disconnect and connect the lines. In addition, it is not possible to automate the replacement process with such connections between the supply or discharge lines and the blowing lance. Instead, it must be accepted that, in order to avoid endangering the technicians who are replacing the blowing lance, the operation of the blowing lance is interrupted for a long time.
Die für ein Auswechseln der Blaslanze erforderliche Zeit kann mit Hilfe einer Vorrichtung verkürzt werden, die in der europäischen Patentanmeldung EP 0 464 427 A2 beschrieben ist. Bei dieser bekannten Wechselvorrichtung ist der Abschnitt, welcher bei den zuvor beschriebenen Blaslanzen zum Anschluß der Versorgungs- und Abfuhrleitungen vorgesehen ist, einem separaten Kupplungskopf zugeordnet. Der Kupplungskopf ist auf einem Gestell befestigt, das darüber hinaus ein hydraulisch betätigbares Hubsystem umfaßt. In das Hubsystem ist der übrige Teil der Blaslanze derart einhängbar, daß das betreffende Ende der Blaslanze in die Aufnahme des Kupplungskopfs einführbar ist. Dabei ist sowohl die Endöffnung des Blasrohres als auch der Ein- und Auslaß des Kühlmantels auf der endseitigen Stirnfläche der Blaslanze angeordnet. In entsprechender Weise sind die Anschlüsse für die Kühlmittelzufuhr- und Abfuhr sowie die Blasfluidzufuhr auf dem der Stirnfläche der Blaslanze zugeordneten Boden der Aufnahme des Kupplungskopfes angeordnet .The time required for changing the blowing lance can be shortened with the aid of a device which is described in European patent application EP 0 464 427 A2. In this known changing device, the section which is provided in the previously described blowing lances for connecting the supply and discharge lines is assigned to a separate coupling head. The coupling head is attached to a frame, which also includes a hydraulically operated lifting system. The remaining part of the blowing lance can be suspended in the lifting system in such a way that the relevant end of the blowing lance can be inserted into the receptacle of the coupling head. It is both the End opening of the blowpipe and the inlet and outlet of the cooling jacket are arranged on the end face of the blowing lance. In a corresponding manner, the connections for the coolant supply and discharge as well as the blowing fluid supply are arranged on the bottom of the receptacle of the coupling head assigned to the end face of the blowing lance.
Während des Einsatzes der bekannten Blaslanze hält die hydraulische Hubvorrichtung die endseitige Stirnfläche der Blaslanze ständig in Anlage an die Bodenfläche der Aufnahme, um eine gleichbleibende Abdichtung von Blasrohr, Kühlmitteleinlaß und -auslaß zu gewährleisten. Dabei sind für das Aufrechterhalten einer dichten Verbindung erhebliche Anpreßkräfte wegen des beträchtlichen Drucks erforderlich, mit dem das Kühlmittel und das Blasfluid in die Blaslanze eingeleitet werden.During the use of the known blowing lance, the hydraulic lifting device keeps the end face of the blowing lance in contact with the bottom surface of the receptacle in order to ensure a constant sealing of the blowing pipe, coolant inlet and outlet. In order to maintain a tight connection, considerable contact forces are required because of the considerable pressure with which the coolant and the blowing fluid are introduced into the blowing lance.
Eine Vorrichtung der eingangs genannten Art ist aus der Europäischen Patentanmeldung EP 0 441 767 A2 bekannt. Bei dieser Vorrichtung sind die Anschlüsse für die Kühlmittelzu- und -abfuhr der Blaslanze gemeinsam mit dem Anschluß für das Blasfluid auf einer seitlichen befestigten Platte angeordnet. Der Kupplungskopf der bekannten Vorrichtung, mit dem die Blaslanze lösbar verkoppelbar ist, weist eine ebenfalls eine Platte auf, auf der αie Anschlüsse für das Blasfluid und das Kühlmittel in entsprechender Weise angeordnet sind. Auch bei dieser bekannten Vorrichtung wird eine hydraulisch arbeitende Vorrichtung eingesetzt, um die Anschlüsse des Kupplungskopfes dicht gegen die Anschlüsse der Blaslanze zu pressen.A device of the type mentioned at the outset is known from European patent application EP 0 441 767 A2. In this device, the connections for the coolant supply and removal of the blowing lance are arranged together with the connection for the blowing fluid on a side fixed plate. The coupling head of the known device with which the blowing lance can be detachably coupled also has a plate on which the connections for the blowing fluid and the coolant are arranged in a corresponding manner. In this known device, too, a hydraulically operating device is used to press the connections of the coupling head tightly against the connections of the blowing lance.
Die voranstehend erläuterten bekannten Wechselvorrichtungen ermöglichen es zwar, eine Blaslanze innerhalb kurzer Zeit auszuwechseln. Sie haben jedoch den Nachteil, daß aufwendige und sowohl hinsichtlich ihrer Anschaffung als auch hinsichtlich ihrer Wartung kostenaufwendige hydraulische Hub- undThe known changing devices explained above make it possible to use a blowing lance can be replaced within a short time. However, they have the disadvantage that complex hydraulic lifting and lifting, both in terms of their acquisition and in terms of their maintenance
Anpresseinrichtungen erforderlich sind, um ein dauerhaft dichtes, sicheres Anpressen der Blaslanze an die Anschlüsse für die Kühlmittelzufuhr und das Blasfluid zu gewährleisten.Pressure devices are required to ensure a permanently tight, safe pressing of the blowing lance to the connections for the coolant supply and the blowing fluid.
Die Aufgabe der Erfindung besteht darin, ausgehend von dem voranstehend erläuterten Stand der Technik eine Wechselvorrichtung für eine Blaslanze zu schaffen, die bei geringen Herstellung- und Wartungskosten ein schnelles Auswechseln einer Blaslanze ermöglicht.The object of the invention is, based on the above-described prior art, to provide a changing device for a blowing lance, which enables a blowing lance to be exchanged quickly with low manufacturing and maintenance costs.
Die voranstehend genannte Aufgabe wird bei einer Wechselvorrichtung der eingangs genannten Art dadurch gelöst,The above-mentioned object is achieved in a changing device of the type mentioned at the outset by
daß bei in die Aufnahme des Kupplungskopfes eingeführter Blaslanze das Blasrohr ineinandergreifend und dicht mit einem Rohransatz der Aufnahme verbunden ist, welcher an die Blasfluidversorgung angeschlossen ist, und daß bei in die Aufnahme des Kupplungskopfes eingeschobener Blaslanze im Bereich des Anschlusses für die Kühlmittelzufuhr und/oder des Anschlusses für die Kühlmittelabfuhr jeweils eine Kammer, insbesondere eine Ringkammer, ausgebildet ist.that when the blow lance is inserted into the receptacle of the coupling head, the blow pipe is interlockingly and tightly connected to a pipe socket of the receptacle, which is connected to the blowing fluid supply, and that when the blow lance is pushed into the receptacle of the coupling head in the area of the connection for the coolant supply and / or Connection for the coolant discharge is formed in each case a chamber, in particular an annular chamber.
Die erfindungsgemäße Ausgestaltung der Blaslanze und des Kupplungskopfes ermöglicht es, die Abdichtung der einzelnen Ein- und Ausgänge der Blaslanze durch ein einfaches Einschieben der Blaslanze in die Aufnahme zu bewerkstelligen. Eine aufwendige Haltevorrichtung ist nach dem Einführen der Blaslanze in die Aufnahme nicht mehr erforderlich. Ebensowenig werden elektrische, hydraulische oder pneumatische Einrichtungen für den Kupplungsvorgang benötigt. Statt dessen kann eine einfache Kupplungsmechanik verwendet werden, wobei die im Bereich der jeweiligen Dichtungsflächen eingesetzten Dichtmittel stets ausreichend, um eine zuverlässige Abdichtung der einzelnen Anschlüsse der Blaslanze während deren Betrieb zu gewährleisten. Auf diese Weise ist durch die Erfindung eine kostengünstige herstellbare Wechselvorrichtung geschaffen, die bei hoher Betriebssicherheit ein einfach durchführbares Auswechseln der Lanze ermöglicht .The inventive design of the blow lance and the coupling head makes it possible to seal the individual inputs and outputs of the blow lance by simply pushing the blow lance into the receptacle accomplish. A complicated holding device is no longer required after the blowing lance has been introduced into the receptacle. Nor are electrical, hydraulic or pneumatic devices required for the coupling process. Instead, a simple coupling mechanism can be used, the sealing means used in the area of the respective sealing surfaces always being sufficient to ensure reliable sealing of the individual connections of the blowing lance during its operation. In this way, the invention provides a cost-effective, changeable device which, with high operational reliability, enables the lance to be replaced easily.
Indem bei in die Aufnahme des Kupplungskopf eingeschobener Blaslanze im Bereich des Anschlusses für die Kühlmittelzufuhr und/oder des Anschlusses für die Kühlmittelabfuhr jeweils eine Kammer, insbesondere eine Ringkammer ausgebildet ist. Bei einer derart ausgestalteten Wechselvorrichtung ist die für das Ausrichten der Blaslanze des Kupplungskopfs erforderliche Zeit auf ein Minimum reduziert, da es in diesem Fall nicht mehr erforderlich ist, den Ein- bzw. Auslaß des Kühlmantels exakt gegenüber dem entsprechenden Anschluß des Kupplungskopfes zu positionieren.By in each case a chamber, in particular an annular chamber, is formed in the region of the connection for the coolant supply and / or the connection for the coolant discharge when the blowing lance is pushed into the receptacle of the coupling head. With such a changing device, the time required for aligning the blow lance of the coupling head is reduced to a minimum, since in this case it is no longer necessary to position the inlet or outlet of the cooling jacket exactly opposite the corresponding connection of the coupling head.
Eine sowohl hinsichtlich des für den Kupplungskopf erforderlichen Bauraums als auch hinsichtlich der Herstellbarkeit der Blaslanze kostengünstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß sowohl der Einlaß als auch der Auslaß des Kühlmantels auf einer Umfangsfläche der Blaslanze münden.An embodiment of the invention which is inexpensive both in terms of the installation space required for the coupling head and in terms of the manufacturability of the blowing lance is characterized in that both the inlet and the outlet of the cooling jacket open onto a peripheral surface of the blowing lance.
Um ein ungewolltes Herausfallen der Blaslanze aus dem Kupplungskopf zu vermeiden, sollte die Blaslanze mit dem Kupplungskopf lösbar verriegelbar sein. Dies kann auf einfache Weise dadurch erreicht werden, daß der Kupplungskopf mittels mindestens eines schwenkbaren an ihm befestigten Haken mit der Blaslanze verriegelbar ist, wobei der Haken während des Einschiebens der Blaslanze in die Aufnahme des Kupplungskopfes sich selbstätig in seine Verriegelungsstellung bewegt. Für den Fall, daß gleichzeitig die dem Anschluß für die Kühlmittelzufuhr zugeordnete Kammer die freie, endseitige Stirnfläche des der Aufnahme zugeordneten Endes der Blaslanze mindestens abschnittsweise umgibt, bewirkt die durch das Kühlmittel auf die Lanze in Richtung von deren Spitze ausgeübte Kraft, daß die Lanze spielfrei in dem Haken gehalten ist.To prevent the blowing lance from accidentally falling out of the coupling head, the blowing lance should be used with the Coupling head can be releasably locked. This can be achieved in a simple manner in that the coupling head can be locked with the blowing lance by means of at least one pivotable hook attached to it, the hook automatically moving into its locking position during insertion of the blowing lance into the receptacle of the coupling head. In the event that at the same time the chamber assigned to the connection for the coolant supply surrounds the free, end face of the end of the blowing lance assigned to the receptacle, the force exerted by the coolant on the lance in the direction of its tip causes the lance to be free of play is held in the hook.
Umgekehrt kann es aber auch günstig sein, wenn an der Blaslanze ein in die dem Anschluß für die Kühlmittelzufuhr zugeordnete Kammer reichender Absatz angeformt ist, auf den das Kühlmittel bei Druckbeaufschlagung eine in die Aufnahme des Kupplungskopfes gerichtete Kraft ausübt. In diesem Fall bewirkt die durch das Kühlmittel ausgeübte Druckkraft, daß die Blaslanze in der Aufnahme gehalten wird.Conversely, it can also be advantageous if a shoulder is formed on the blowing lance and extends into the chamber assigned to the connection for the supply of coolant, to which the coolant exerts a force directed into the receptacle of the coupling head when pressure is applied. In this case, the pressure force exerted by the coolant causes the blowing lance to be held in the receptacle.
Schließlich ist es vorteilhaft, wenn der Rohreinsatz und das Blasrohr über mindestens eine Ringdichtung dicht miteinander verbunden sind, welche zwischen dem Rohransatz und dem Blasrohr angeordnet ist.Finally, it is advantageous if the pipe insert and the blow pipe are tightly connected to one another via at least one ring seal, which is arranged between the pipe extension and the blow pipe.
Nachfolgend wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of a drawing illustrating an exemplary embodiment. Show it:
Fig. 1 eine Wechselvorrichtung für eine Blaslanze in einer ausschnittsweisen, teilweise aufgebrochenen frontalen Ansicht; Fig. 2 die Wechselvorrichtung nach Figur 1 in einer ausschnittsweisen, seitlichen Ansicht.1 shows a changing device for a blowing lance in a partial, partially broken frontal view. Fig. 2 shows the change device of Figure 1 in a partial side view.
Die in den Figuren gezeigte Wechselvorrichtung für eine Blaslanze 1 weist einen Kupplungskopf 2 auf, der über eine Führung 3 höhen- , Seiten- und winkelverstellbar an einem nicht gezeigten Gestell befestigt ist. Der Kupplungskopf 2 weist einen ersten Anschluß 4 für ein Blasfluid, insbesondere Sauerstoff, auf, der an der oberen Seite 5 des Kupplungskopfes 2 angeordnet ist. In den Anschluß 4 ist ein Rohreinsatz 6 eingepaßt, der mit seinem dem Innern des Kupplungskopfes 2 zugeordneten Ende 6a in eine Aufnahme 7 hineinreicht.The changing device for a blowing lance 1 shown in the figures has a coupling head 2, which is attached to a frame (not shown) in a height, lateral and angle-adjustable manner via a guide 3. The coupling head 2 has a first connection 4 for a blowing fluid, in particular oxygen, which is arranged on the upper side 5 of the coupling head 2. A pipe insert 6 is fitted into the connection 4 and extends into a receptacle 7 with its end 6a assigned to the inside of the coupling head 2.
Die Aufnahme 7 des Kupplungskopfes ist zur Unterseite 8 des Kupplungskopfes 2 geöffnet. In die Aufnahme 7 ist von der Unterseite 8 her ein Ringeinsatz 9 eingesetzt, welcher sich mit seinem unteren Abschnitt trichterförmig zur Unterseite 8 hin erweitert. Im mittleren Abschnitt des Ringeinsatzes 9 ist eine Nut 9a eingeformt, welcher mit einer fensterartigen Öffnung 9b versehen ist. Ober- und unterhalb des Ringnut 9a sind Ringdichtungen 10, 11 in dafür vorgesehene Nuten eingelegt .The receptacle 7 of the coupling head is open to the underside 8 of the coupling head 2. A ring insert 9 is inserted into the receptacle 7 from the underside 8, and its lower section widens in a funnel shape towards the underside 8. In the middle section of the ring insert 9, a groove 9a is formed, which is provided with a window-like opening 9b. Ring seals 10, 11 are placed in grooves provided for this purpose above and below the ring groove 9a.
Die Öffnung 9b des Ringeinsatzes 9 ist einem zweiten Anschluß zugeordnet, an den eine nicht gezeigte Kühlmittelabfuhrleitung anschließbar ist. Ein dritter Anschluß 13 ist oberhalb des zweiten Anschlusses 12 angeordnet und mündet ebenfalls in der Aufnahme 7. An den Anschluß 13 ist eine hier ebenfalls nicht gezeigte Kühlmittelzufuhrleitung anschließbar.The opening 9b of the ring insert 9 is assigned to a second connection to which a coolant discharge line, not shown, can be connected. A third connection 13 is arranged above the second connection 12 and also opens into the receptacle 7. A coolant supply line, also not shown here, can be connected to the connection 13.
Die Blaslanze 1 weist ein innenliegendes Blasrohr 20 auf, dessen der Aufnahme 7 des Kupplungskopfes 2 zugeordneten Endabschnitts 21 aufgeweitet ist und eine gegenüber der Restlänge des Blasrohres vergrößerte Wandstärke aufweist. Mit seinem Endabschnitt 21 ist das Blasrohr 20 auf den Endabschnitt 6a des Rohreinsatzes 6 aufgeschoben, wobei drei in Achsrichtung des Rohrabschnitts 6 hintereinander angeordnete Ringdichtungen 23 die Abdichtung der ineinandergreifenden Abschnitte des Rohreinsatzes 6 und des Blasrohrs 20 gegenüber der Umgebung sicherstellen.The blowing lance 1 has an internal blowing tube 20, the end section 21 associated with the receptacle 7 of the coupling head 2 is widened and one opposite the Remaining length of the blowpipe has increased wall thickness. With its end section 21, the blowpipe 20 is pushed onto the end section 6a of the pipe insert 6, three ring seals 23 arranged one behind the other in the axial direction of the pipe section 6 ensuring the sealing of the interlocking sections of the pipe insert 6 and the blowpipe 20 from the environment.
Das Blasrohr 20 ist in einen Kühlmantel 30 der Blaslanze 1 eingesetzt und lösbar mit diesem verbunden. Der Kühlmantel 30 weist eine sich koaxial zum Blasrohr 20 erstreckende, beabstandet zu diesem angeordnete Trennwand 31 auf, durch die eine erste Kammer 32 und eine zweite Kammer 33 innerhalb des Kühlmantels 30 abgeteilt sind. Mit der ersten Kammer 32 des Kühlmantels verbunden sind Einlaßöffnungen 34, welche am oberen, der Aufnahme 7 zugeordneten Ende der Blaslanze 1 eingeformt sind. Die zweite Kammer 33 mündet dagegen in Auslaßöffnungen 35, welche versetzt zur nicht gezeigten Spitze der Blaslanze 1 unterhalb einer zwischen den Einlaßöffnungen 34 und den Auslaßöffnungen 35 ausgebildeten ersten Dichtfläche 36 in den Kühlmantel 30 eingeformt sind. Die erste und die zweite Kammer 32, 33 des Kühlmantels sind im Bereich der nicht gezeigten Spitze der Blaslanze miteinander verbunden, so daß das Kühlmittel, welches durch die Einlaßöffnungen 34 in die erste Kammer 32 einströmt, entlang des Blasrohres 20 zur Spitze der Blaslanze 1 geleitet und von dort durch die Kammer 33 zurück zu den Auslaßöffnungen 35 gespült wird.The blow pipe 20 is inserted into a cooling jacket 30 of the blow lance 1 and is detachably connected to it. The cooling jacket 30 has a partition wall 31 which extends coaxially to the blowpipe 20 and is spaced apart therefrom and through which a first chamber 32 and a second chamber 33 are divided within the cooling jacket 30. Connected to the first chamber 32 of the cooling jacket are inlet openings 34 which are formed at the upper end of the blowing lance 1 assigned to the receptacle 7. The second chamber 33, on the other hand, opens into outlet openings 35, which are formed in the cooling jacket 30, offset from the tip of the blowing lance 1, not shown, below a first sealing surface 36 formed between the inlet openings 34 and the outlet openings 35. The first and second chambers 32, 33 of the cooling jacket are connected to one another in the region of the tip of the blowing lance, not shown, so that the coolant which flows into the first chamber 32 through the inlet openings 34 is conducted along the blowing tube 20 to the tip of the blowing lance 1 and from there it is flushed back through the chamber 33 to the outlet openings 35.
Bei in die Aufnahme 7 eingeschobener Blaslanze 1 liegt die Dichtung 10 des Ringeinsatzes 9 an der ersten Dichtfläche 36 der Blaslanze 1 an und dichtet die durch die Ringnut 9a gebildete Ringkammer 40 gegenüber einer zweiten, im oberen Bereich der Aufnahme 7 gebildeten Kammer 41 ab, welche mit dem Anschluß 13 für die Kühlmittelzufuhr verbunden ist. Die zweite Kammer 41 der Aufnahme 7 umgibt die endseitige Stirnfläche 42 der Blaslanze 1, so daß der Druck des in der Kammer 41 anstehenden Kühlmittels eine Kraft in Richtung der nicht gezeigten Spitze der Blaslanze 1 auf diese ausübt.When the blowing lance 1 is pushed into the receptacle 7, the seal 10 of the ring insert 9 lies against the first sealing surface 36 of the blowing lance 1 and seals the annular chamber 40 formed by the annular groove 9a against a second chamber 41 formed in the upper region of the receptacle 7, which with the connection 13 for the Coolant supply is connected. The second chamber 41 of the receptacle 7 surrounds the end face 42 of the blowing lance 1, so that the pressure of the coolant present in the chamber 41 exerts a force in the direction of the tip of the blowing lance 1, not shown.
Ein unbeabsichtiges Herausfallen der Blaslanze 1 aus dem Kupplungskopf 2 wird durch seitlich von dem Kupplungskopf 2 und über Bolzen 50 schwenkbar an diesem gefestigte Haken 51 verhindert. Die Haken 51 greifen mit ihren hakenförmig ausgebildeten Enden 51a um die Enden von bolzenartigen Vorsprüngen 52, die an einen fest mit der Blaslanze 1 verbundenen Haltering 53 angeformt sind. Die Haken 51 weisen an ihrem unteren Ende eine Schrägfläche 54 auf. An den Schrägflächen 54 gleiten die Vorsprünge 52 während des Einschiebens der Blaslanze 1 in die Ausnehmung 7 entlang, so daß der Haken 51 aus dem Förderweg 52 geschwenkt wird, bis diese die Spitze 55 passiert haben. Anschließend fällt der Haken 51 in seine Ausgangsstellung zurück. Durch die Druckbeaufschlagung der Kammer 42 mittels des Kühlmittels wird anschließend die Blaslanze 1 in die Hakenaufnahme der Haken 51 gedrückt und spielfrei in dieser gehalten.Unintentional falling out of the blowing lance 1 from the coupling head 2 is prevented by hooks 51 which are pivoted to the side of the coupling head 2 and by means of bolts 50. The hooks 51 engage with their hook-shaped ends 51a around the ends of bolt-like projections 52, which are molded onto a retaining ring 53 which is firmly connected to the blowing lance 1. The hooks 51 have an inclined surface 54 at their lower end. The projections 52 slide on the inclined surfaces 54 while the blowing lance 1 is being pushed into the recess 7, so that the hook 51 is pivoted out of the conveying path 52 until they have passed the tip 55. Then the hook 51 falls back into its starting position. By pressurizing the chamber 42 by means of the coolant, the blowing lance 1 is then pressed into the hook receptacle of the hooks 51 and held there without play.
Zum Auswechseln der Blaslanze 1 wird die Blaslanze 1 nach dem Abschalten der Kühlmittelzufuhr in der Kammer 41 in die Aufnahme 7 hineingeschoben, bis die Haken 51 frei verschwenkt werden können. Nach dem Wegschwenken der Haken 51 kann die Blaslanze ungehindert aus der Aufnahme 7 herausgezogen werden und durch eine neue Blaslanze 1 ersetzt werden. To replace the blowing lance 1, the blowing lance 1 is pushed into the receptacle 7 after the coolant supply has been switched off in the chamber 41 until the hooks 51 can be pivoted freely. After the hooks 51 have been pivoted away, the blowing lance can be pulled out of the receptacle 7 unhindered and replaced by a new blowing lance 1.

Claims

P a t e n t a n s p r ü c h e P a t e n t a n s r u c h e
Wechselvorrichtung für eine Blaslanze (1) , die ein Blasrohr (20) und einen das Blasrohr (20) umgebenden, mit Kühlmittel durchspülbaren Kühlmantel (30) aufweist, dessen Ein- und Auslaß (34,35) an dem einem Kupplungskopf (2) zugeordneten Ende der Blaslanze (1) angeordnet sind, wobei der Kupplungskopf (2) eine Aufnahme (7) aufweist, in die dieses Ende der Blaslanze (1) einführbar ist und die AnschlüsseChanging device for a blowing lance (1), which has a blowing pipe (20) and a cooling jacket (30) surrounding the blowing pipe (20) and having a coolant which can be flushed with coolant, the inlet and outlet (34, 35) of which are assigned to a coupling head (2) End of the blowing lance (1) are arranged, the coupling head (2) having a receptacle (7) into which this end of the blowing lance (1) can be inserted and the connections
(4,12,13) für die Kühlmittelzufuhr, die Kühlmittelabfuhr und die Blasfluidzufuhr umfaßt, wobei die Blaslanze (1) lösbar mit dem Kupplungskopf verkoppelbar ist, wobei mindestens der Einlaß (34) oder der Auslaß (35) des Kühlmantels (30) auf eine Umfangsfläche der Blaslanze (1) münden und wobei der dem Einlaß (34) oder Auslaß (35) jeweils zugeordnete Anschluß (12,13) auf einer der jeweiligen Umfangsfläche zugeordneten Seitenfläche der Aufnahme(4, 12, 13) for the coolant supply, the coolant discharge and the blowing fluid supply, the blowing lance (1) being detachably coupled to the coupling head, at least the inlet (34) or the outlet (35) of the cooling jacket (30) being open a peripheral surface of the blowing lance (1) opens and the connection (12, 13) respectively assigned to the inlet (34) or outlet (35) on a side surface of the receptacle assigned to the respective peripheral surface
(7) angeordnet ist, d a d u r c h g e k e n n z e i c h n e t,(7) is arranged, that a d u r c h g e k e n n z e i c h n e t,
- daß bei in die Aufnahme (7) des Kupplungskopfes (2) eingeführter Blaslanze (1) das Blasrohr (20) ineinandergreifend und dicht mit einem Rohransatz (6) der Aufnahme (7) verbunden ist, welcher an die Blasfluidversorgung angeschlossen ist, und- That when inserted into the receptacle (7) of the coupling head (2) blowing lance (1), the blowing pipe (20) interlocking and tightly connected to a pipe extension (6) of the receptacle (7), which is connected to the blowing fluid supply, and
- daß bei in die Aufnahme (7) des Kupplungskopfes (2) eingeschobener Blaslanze (1) im Bereich des Anschlusses (12) für die Kühlmittelzufuhr und/oder des Anschlusses (12) für die Kühlmittelabfuhr jeweils eine Kammer (40,41) , insbesondere eine Ringkammer, ausgebildet ist. Wechselvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß sowohl der Einlaß (34) als auch der Auslaß (35) des Kühlmantels (30) auf einer Umfangsfläche der Blaslanze- That in the receptacle (7) of the coupling head (2) inserted blowing lance (1) in the area of the connection (12) for the coolant supply and / or the connection (12) for the coolant discharge each have a chamber (40, 41), in particular an annular chamber is formed. Changing device according to claim 1, characterized in that both the inlet (34) and the outlet (35) of the cooling jacket (30) on a peripheral surface of the blowing lance
( 1 ) münden .(1) flow out.
Wechselvorrichtung nach einem der voranstehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß der Kupplungskopf (2) mittels mindestens eines schwenkbar an ihm befestigten Hakens (51) mit der Blaslanze (1) verriegelbar ist und daß der Haken (51) während des Einschiebens der Blaslanze (1) in die Aufnahme (7) des KupplungskopfesChange device according to one of the preceding claims, characterized in that the coupling head (2) can be locked with the blowing lance (1) by means of at least one hook (51) pivotably attached to it and that the hook (51) during insertion of the blowing lance (1) in the receptacle (7) of the coupling head
(2) sich selbstätig in seine Verriegelungsstellung bewegt .(2) moves automatically into its locked position.
Wechselvorrichtung nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t, daß die dem Anschluß (13) für die Kühlmittelzufuhr zugeordnete Kammer (41) die freie endseitige Stirnfläche (42) des der Aufnahme (7) zugeordneten Endes der Blaslanze (2) mindestens abschnittsweise umgibt .Exchange device according to claim 3, so that the chamber (41) associated with the connection (13) for the coolant supply surrounds the free end face (42) of the end of the blowing lance (2) associated with the receptacle (7) at least in sections.
Wechselvorrichtung nach einem der Ansprüche 1-3, d a d u r c h g e k e n n z e i c h n e t, daß an der Blaslanze (1) ein in die dem Anschluß (13) für die Kühlmittelzufuhr zugeordnete Kammer (41) reichender Absatz angeformt ist, auf den das Kühlmittel bei Druckbeaufschlagung eine in die Aufnahme (7) des Kupplungskopfes (2) gerichtete Kraft ausübt. Wechselvorrichtung nach einem der voranstehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß der Rohreinsatz (6) und das Blasrohr (20) der Blaslanze (1) über mindestens eine Ringdichtung (23) dicht miteinander verbunden sind. Changing device according to one of Claims 1-3, characterized in that a shoulder is formed on the blowing lance (1) and extends into the chamber (41) assigned to the connection (13) for the coolant supply, onto which the coolant, when pressurized, is pressed into the receptacle ( 7) the coupling head (2) exerts directed force. Changing device according to one of the preceding claims, characterized in that the tube insert (6) and the blow tube (20) of the blow lance (1) are tightly connected to one another via at least one ring seal (23).
EP96937279A 1995-11-04 1996-10-29 Exchange device for a blow lance Expired - Lifetime EP0858515B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19541199A DE19541199C2 (en) 1995-11-04 1995-11-04 Changing device for a blowing lance
DE19541199 1995-11-04
PCT/EP1996/004693 WO1997017474A1 (en) 1995-11-04 1996-10-29 Exchange device for a blow lance

Publications (3)

Publication Number Publication Date
EP0858515A1 true EP0858515A1 (en) 1998-08-19
EP0858515B1 EP0858515B1 (en) 1999-06-30
EP0858515B2 EP0858515B2 (en) 2003-07-30

Family

ID=7776665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96937279A Expired - Lifetime EP0858515B2 (en) 1995-11-04 1996-10-29 Exchange device for a blow lance

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US (1) US6022507A (en)
EP (1) EP0858515B2 (en)
AR (1) AR004142A1 (en)
AT (1) ATE181748T1 (en)
BR (1) BR9611375A (en)
DE (3) DE19541199C2 (en)
ES (1) ES2134015T5 (en)
IN (1) IN192458B (en)
WO (1) WO1997017474A1 (en)
ZA (1) ZA969136B (en)

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Publication number Priority date Publication date Assignee Title
US6139792A (en) * 1997-02-07 2000-10-31 Kvaerner Davy Ltd. Exchange of an oxygen lance for liquid steel conversion
GB9825428D0 (en) * 1998-11-19 1999-01-13 Kvaerner Metals Davy Ltd A quick change blow lance
US20040094878A1 (en) * 2002-11-19 2004-05-20 Leczo Theodore J. Modular lance
US20100237302A1 (en) 2009-03-16 2010-09-23 Montebon Sociedad Anonima Side anchor stretcher for filiform elements and method of production of said stretcher
DE102016223722B4 (en) 2016-11-29 2024-04-25 Sms Group Gmbh Device and method for assembling and disassembling a lance head

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US3170977A (en) * 1961-11-16 1965-02-23 Koppers Co Inc Oxygen lance with detachable barrel
DE1265179B (en) * 1961-11-16 1968-04-04 Koppers Co Inc Lance for blowing gas into a refining bath for metal
CA1103449A (en) * 1977-05-09 1981-06-23 William W. Berry Oxygen lance assembly
LU86985A1 (en) * 1987-09-07 1989-04-06 Wurth Paul Sa AUTOMATIC LANCES CHANGER
EP0441767B1 (en) * 1990-02-01 1995-01-11 Voest-Alpine Industrieanlagenbau Gmbh An arrangement for supplying media to a blowing lance
LU87761A1 (en) * 1990-07-04 1992-03-11 Wurth Paul Sa DEVICE FOR AUTOMATICALLY COUPLING AN INSUFFLATION LANCE TO A CONNECTING HEAD
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ES2134015T3 (en) 1999-09-16
DE19541199C2 (en) 2001-05-23
BR9611375A (en) 1999-09-14
ZA969136B (en) 1997-05-27
EP0858515B2 (en) 2003-07-30
AR004142A1 (en) 1998-09-30
DE29623273U1 (en) 1998-02-26
DE59602344D1 (en) 1999-08-05
WO1997017474A1 (en) 1997-05-15
ATE181748T1 (en) 1999-07-15
ES2134015T5 (en) 2004-05-01
MX9803343A (en) 1998-09-30
EP0858515B1 (en) 1999-06-30
IN192458B (en) 2004-04-24
DE19541199C1 (en) 1997-04-10
US6022507A (en) 2000-02-08

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