EP0271474A1 - Installation for removing hollow bricks inserted in the tap holes of metallurgical vessels - Google Patents

Installation for removing hollow bricks inserted in the tap holes of metallurgical vessels Download PDF

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Publication number
EP0271474A1
EP0271474A1 EP87890249A EP87890249A EP0271474A1 EP 0271474 A1 EP0271474 A1 EP 0271474A1 EP 87890249 A EP87890249 A EP 87890249A EP 87890249 A EP87890249 A EP 87890249A EP 0271474 A1 EP0271474 A1 EP 0271474A1
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EP
European Patent Office
Prior art keywords
pull
pressure medium
medium cylinder
rod
tensioning
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
EP87890249A
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German (de)
French (fr)
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EP0271474B1 (en
Inventor
Hubert Öllinger
Alois Klapka
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.)
Primetals Technologies Austria GmbH
Veitscher Magnesitwerke AG
Original Assignee
Voestalpine AG
Veitscher Magnesitwerke AG
Voest Alpine Industrienlagenbau GmbH
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Publication date
Application filed by Voestalpine AG, Veitscher Magnesitwerke AG, Voest Alpine Industrienlagenbau GmbH filed Critical Voestalpine AG
Publication of EP0271474A1 publication Critical patent/EP0271474A1/en
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Publication of EP0271474B1 publication Critical patent/EP0271474B1/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
    • 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
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the invention relates to a device for removing perforated stones inserted into the tap hole of metallurgical vessels.
  • Tapping openings of metallurgical vessels are often formed by perforated bricks, which wear out after a certain period of operation due to contact with liquid metal during pouring and then have to be replaced.
  • Such perforated stones often interact with closure devices, such as plugs or sliders.
  • closure devices such as plugs or sliders.
  • timely replacement of worn perforated bricks is important, it being essential that the replacement of a worn perforated brick with an intact perforated brick in a short period of time and, in order to avoid energy losses, on the metallurgical vessel which is as hot as possible is feasible.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to provide a device for removing perforated bricks, with which this work can be carried out precisely, without damaging the permanent lining of the hotest possible vessel and with a minimum of effort, and by unskilled, i.e. is not feasible for specially trained workers.
  • the device has a machine frame which can be supported on the outside of the metallurgical vessel and in which a pulling device which extends in the axial direction of the perforated brick and is longitudinally adjustable in this axial direction by means of a pull-out pressure medium cylinder is mounted, on which the perforated brick at least two clamping claws are fastened to the interior of the metallurgical vessel guidable end of the pull-out device and can be brought into and out of engagement with the perforated brick by means of a spreading device.
  • a particularly simple and inexpensive construction is characterized according to the invention in that the machine frame is supported on the tap opening by means of the pull-out pressure medium cylinder and the The pull-out device can be fastened to the machine frame in different longitudinal positions, the pull-out device preferably being formed from a tensioning pull rod, a clamping claw support tube arranged coaxially to the tensioning pull rod and a coaxial outer and rotatable support tube which is longitudinally displaceable and rotatable relative to the clamping claw support tube, and wherein for fastening the pull-out device on the machine frame, the machine frame has at least one elongated hole, into which at least one of the pins arranged one behind the other in the longitudinal direction of the support tube and fastened thereon can be inserted.
  • the machine frame is formed by a bridge projecting beyond the tap opening, which is attached at one end to the metallurgical vessel by means of a suspension, preferably articulated and whose other end is supported on the metallurgical vessel with the interposition of the pull-out pressure medium cylinder, the expediently the Pull-out pressure medium cylinder can be actuated by means of a hand pump attached to the machine frame.
  • the spreading device preferably has a wedge piece which is arranged between sliding surfaces of the clamping claws and can be actuated by the tensioning pull rod, the tensioning pull rod being able to be supported at the free end of the pull-out device by means of a tensioning device, such as a tensioning nut.
  • a particularly easy-to-use device is characterized in that the pull-out rod can be moved by means of an annular piston which is arranged coaxially thereto and a pull-out pressure medium cylinder which can be acted on from both sides, the front of the pull-out pressure medium cylinder being supported on the metallurgical vessel and the pull-out rod penetrates the ring piston.
  • the spreading device preferably has a wedge piece, which is arranged between sliding surfaces of the clamping claws, and can be actuated by a tensioning rod which coaxially penetrates the extension rod, the tensioning rod at the free end of the extension rod using a tensioning device, such as a tensioning pressure medium cylinder which can be acted upon on both sides Piston is supported with the tension rod and its cylinder is connected to the pull-out rod.
  • a tensioning device such as a tensioning pressure medium cylinder which can be acted upon on both sides Piston is supported with the tension rod and its cylinder is connected to the pull-out rod.
  • both the pull-out and the clamping pressure medium cylinders can advantageously be actuated by means of a single valve, the clamping pressure medium cylinder having a smaller volume than the pull-out pressure medium cylinder and the pressure medium lines provided from the valve to the pull-out pressure medium cylinder being provided with throttle valves are.
  • a hydraulic unit with an electrically operated motor for the pressure medium cylinders is expediently provided in the machine frame.
  • gripping jaws which are interchangeable with gripping jaws of different types are expediently attached to the clamping claws.
  • FIGS. 1 and 2 showing a device according to a first embodiment in use with a converter tap opening shown in section.
  • Fig. 3 is an illustration of a along line III- III of Fig. 2 performed section.
  • 4 to 8 illustrate a second embodiment, FIG. 4 illustrating a top view of the device inserted into the tap opening and FIGS. 5 and 6 associated sectional views of the device in different operating positions.
  • 7 is a detail of FIG. 5 on an enlarged scale
  • FIG. 8 shows the hydraulic diagram for the second embodiment.
  • a plurality of coaxially arranged perforated stones 2, which are designed as interchangeable stones, are used in a converter tapping 1.
  • the converter tapping 1 with its axis 3 must be brought into an approximately horizontal position by tilting the converter.
  • the perforated stones 2 are removed from the work platform 4 installed in front of the converter tapping 1.
  • the perforated stones 2 are secured to a pair of tapping glasses 5 of the converter tapping 1 by means of a stone lock formed by wedges 6.
  • the device for removing the perforated blocks 2 has a machine frame 7, which is formed by a bridge 9 spanning the tap opening 8.
  • the bridge 9 is supported on the one hand with a strut 10 on the tapping glasses 5 and hangs on the tapping glasses 5 by means of a suspension bracket 11 which engages over the tapping glasses 5 in a clamp-like manner.
  • a pull-out pressure medium cylinder 12 is articulated, the piston 13 of which is supported on the tapping glasses 5.
  • the pull-out pressure medium cylinder 12 which is preferably designed as a hydraulic pressure medium cylinder, the bridge 9 can be moved away from the tap opening 8.
  • the bridge is articulated to the suspension bracket 11.
  • the bridge 9 comprises two parallel supports 14 spanning the tap opening 8, each of which is provided with an elongated hole 15 in the area above the tap opening 8.
  • a pull-out device can be inserted between the supports 14, which is formed by a clamping claw support tube 16, an axially displaceable and rotatable support tube 17 relative thereto and axially displaceable and rotatable with respect to the clamping claw support tube 16, and a pull-tension rod 22 which penetrates the clamping claw support tube 16 centrally .
  • On the support tube 17 are arranged on the outside in the longitudinal direction one behind the other and diametrically opposite to the longitudinal axis 18 of the pulling device in opposite pins 19, all pins 19 lying in one plane.
  • the pull-out device can be displaced in the longitudinal direction between the supports 14 of the bridge 9.
  • the support tube 17 is rotated by 90 °, two pins 19 lying opposite one another engage with the elongated holes 15 and the support tube 17 is fixed in the longitudinal direction with respect to the bridge 9.
  • a wedge piece 23 is used to spread the clamping claws 20, which is attached to the front end of the tensioning pull rod 22 and bears against sliding surfaces 23 'provided on the clamping claws 20.
  • the tensioning pull rod 22 At the rear end protruding from the clamping claw support tube 16, the tensioning pull rod 22 has a thread on which a tension nut 24, which can be supported against the rear end of the clamping claw support tube 16 and the support tube 17, is screwed. To actuate the clamping nut 24, this is with Handles 25 provided.
  • a hydraulic hand pump 26 coupled to the pull-out pressure medium cylinder 12, the actuating lever of which is designated 27.
  • the stone fuses 6 are removed.
  • the pulling device is then inserted into the tap opening 8 until the gripping jaws 21 of the clamping claws 20 come to rest in the vertically openable position at the first stone joint.
  • the clamping claws 20 are spread by means of the clamping nut 24 until the gripping jaws 21 engage in the first stone joint.
  • the pins 19 of the support tube 17 lie, as shown in Fig. 1, with their axes in a vertical plane.
  • the bridge 9 is then pushed over the pull-out device and hung on the tapping glasses 5 with the suspension bracket 11.
  • the piston 13 of the pull-out pressure medium cylinder 12 is in the retracted position and the support tube 17 in the rearmost position, in which it is as close as possible to the clamping nut 24.
  • the support tube 17 By rotating the support tube 17 by 90 °, two of the pins 19 engage with the elongated holes 15. Then, for the sake of safety, the clamping nut 24 is actuated again to retighten the clamping claws 20.
  • the piston 13 of the pull-out pressure medium cylinder 12 is extended by pumping by means of the hand pump 26 when its oil pressure relief screw is in the closed position, as a result of which the bridge 9, the tensioning pull rod 22 via the support tube 17 and the Clamping nut 24 and with it the clamping claws 20 and the clamping claw support tube 16 are moved out of the tap opening 8 in the axial direction and the first perforated brick 2 is loosened.
  • the bridge 9 By opening the oil pressure relief screw on the hydraulic pump 26, the bridge 9 returns to its starting position and, after the support tube 17 has been rotated by 90 ° into the position shown in FIG. 1, can be lifted off the tapping glasses 5, whereupon the first perforated brick 2 is removed by means of the pulling device can be.
  • the further perforated blocks 2 are removed in an analogous manner.
  • the device has a front plate 29 supported on a slide base plate 28 of a (already dismantled) slide closure of a pan, on which the pull-out pressure medium cylinder 30, which in this case acts as a double-acting hydraulic cylinder an annular piston 31 is formed, is arranged.
  • the pull-out rod 32 is fastened to the annular piston, which it passes through centrally, and also passes through the cylinder base of the pull-out pressure medium cylinder 30.
  • a tensioning pressure medium cylinder 33 which is also designed as a double-acting hydraulic cylinder, is arranged, the piston 34 of which also which is connected to the wedge piece 35 for expanding the clamping claws 36 having tension rod 37.
  • the cylinder 38 of the clamping pressure medium cylinder 33 is attached to the end of the pull-out rod 32.
  • the tension rod 37 passes through the pull-out rod 32 coaxially.
  • a console designed as a cylindrical tube and thus receiving and protecting the clamping pressure medium cylinder 33 39, at the rear end of which a hydraulic unit 40 is fastened, which has an electrically operated motor 41, a hydraulic pump 42, a tank 43 and a control valve 44.
  • Pressure medium lines 45, 46 lead from the tank 43 or the control valve 44 of the hydraulic unit 40 to the pull-out pressure medium cylinder 30 on the one hand and to the clamping pressure medium cylinder 33 on the other hand.
  • a balancing rod 48 arranged at the rear end is used with protruding handle pieces 49. From these handle pieces 49, the operator can press buttons 49 ⁇ for the control operate the device and balance the device suspended approximately in the center of gravity in the horizontal and vertical directions.
  • Throttle valves 50 are provided in the pressure medium lines 45, 46 leading to the pull-out pressure medium cylinder 30, so that when the control valve 44 is moved into position A, pressure medium first enters the tensioning pressure medium cylinder 33 and only after a delay enters the pull-out pressure medium cylinder 30.
  • the clamping claws 36 are released from the perforated brick 2, for which purpose the valve is moved to position B, the clamping pressure medium cylinder 33 is also acted on first because of the delay caused by the throttle valves 50, and only then is the pulling out pressure medium cylinder 30.
  • the clamping claws 36 are formed from two articulated halves which, relative to one another, permit an opening and closing movement similar to a pair of pliers.
  • the wedge piece 35 which can also be spherical, along the mutually inclined sliding surfaces 35 ⁇ of the clamping claws 36 the spreading apart of the clamping claws 36 is effected according to the "pull wedge principle".
  • Gripping jaws 51 are fastened, preferably screwed, to the clamping claws 36, on the surface of which saw teeth with grooves are provided.
  • a positive connection with the perforated brick 2 can be produced. If the perforated brick 2 is badly worn, e.g. no longer has an edge at its end, a non-positive connection to the perforated brick 2 can be established by means of the clamping claws 36.
  • the gripping jaws 51 are expediently interchangeable in order to adapt the area of use of the device to different perforated stone diameters.
  • the device is suspended from its lifting eyes 47 on a hoist and brought into position by means of the balancing rod 48.
  • An electrical connection for the electric motor 41 is sufficient for the energy supply.
  • the operator inserts the pull-out rod 32 into the perforated brick 2 after he has possibly previously adapted the clamping claws 36 to the perforated brick diameter by means of the gripping jaws 51. Before insertion, the hydraulics must be switched on and the control valve 44 pushed into position B, so that the clamping pressure medium cylinder 33 is relaxed and the piston 31 of the pull-out pressure medium cylinder 30 moves into the front end position.
  • the valve is switched over to tensioning and extending (position A). If the perforated brick 2 has broken loose, the device can be removed from the tap hole after reaching the rear end position of the annular piston 31 of the pull-out pressure medium cylinder 30, after which the worn perforated brick 2 can be removed from the clamping claws 36 after the spreader device has been relaxed.
  • the tap hole has a plurality of perforated stones lying one behind the other, a device with a longer pull-out stroke is to be used or the pull-out rod 32 is adapted with screw-on intermediate pieces.
  • the invention is not limited to the exemplary embodiments shown in the drawing, but can be modified in various ways.
  • the device can also be mounted on a manipulator that can be moved on working platforms.

Abstract

1. An arrangement for removing nozzle bricks (2) inserted in the tap hole (8) of metallurgical vessels, comprising a machine frame (7; 29, 39) adapted to be supported on the external side of the metallurgical vessel and in which an extraction means (16, 17, 22; 32) extending in the axial direction of the nozzle brick (2) and adjustable in length in this axial direction by means of an extraction pressure medium cylinder (12; 30) is mounted, wherein at least two clamping claws (20; 36) are fastened to the end of the extraction means (16; 32) leading through the nozzle brick (2) towards the interior of the metallurgical vessel, which clamping claws are placeable into and out of engagement with the nozzle brick (2) by means of a straddling device (23, 24; 33, 35).

Description

Die Erfindung betrifft eine Vorrichtung zum Ausbau von in die Abstichöffnung metallurgischer Gefäße eingesetzten Lochsteinen.The invention relates to a device for removing perforated stones inserted into the tap hole of metallurgical vessels.

Abstichöffnungen metallurgischer Gefäße, wie z.B. von Stahlgießpfannen, Konvertern etc., sind häufig von Lochsteinen gebildet, die nach einer gewissen Betriebszeit durch den Kontakt mit flüssigem Metall beim Ausgießen verschleißen und dann ersetzt werden müssen.Tapping openings of metallurgical vessels, e.g. of steel ladles, converters, etc., are often formed by perforated bricks, which wear out after a certain period of operation due to contact with liquid metal during pouring and then have to be replaced.

Solche Lochsteine wirken oft mit Verschlußeinrichtungen, wie Stopfen bzw. Schiebern, zusammen. Um die Funktion der Verschlußeinrichtungen wirksam aufrecht zu erhalten, ist ein rechtzeitiger Austausch verschlissener Lochsteine von Bedeutung, wobei es wesentlich ist, daß der Ersatz eines verschlissenen Lochsteines gegen einen intakten Lochstein in einer kurzen Zeitspanne und, um Energieverluste zu vermeiden, am möglichst heißen metallurgischen Gefäß durchführbar ist.Such perforated stones often interact with closure devices, such as plugs or sliders. In order to effectively maintain the function of the closure devices, timely replacement of worn perforated bricks is important, it being essential that the replacement of a worn perforated brick with an intact perforated brick in a short period of time and, in order to avoid energy losses, on the metallurgical vessel which is as hot as possible is feasible.

Es ist bekannt, zum Austausch der Lochsteine Preßlufthämmer sowie Spezialbohrmaschinen einzusetzen. Diese Arbeit erfordert großes Geschick der Arbeitskräfte und ist mit erheblichen Gefahren und Belastungen des eingesetzten Personales verbunden, da die Abstichöffnungen metallurgischer Gefäße meist an von außen schwer zugänglichen Stellen vorgesehen sind und das metallurgische Gefäß meist noch heiß ist. Die Arbeit mit Preßlufthämmern und Bohrmaschinen kann zu Beschädigungen des Dauerfutters führen, so daß letzten Endes nicht nur der Lochstein, sondern auch ein Teil des ihn umgebenden Dauerfutters repariert werden muß.It is known to use pneumatic hammers and special drills to replace the perforated stones. This work requires a great deal of skill on the part of the workforce and is associated with considerable dangers and burdens on the personnel employed, since the tap openings of metallurgical vessels are usually provided in places that are difficult to access from outside and the metallurgical vessel is usually still hot. Working with pneumatic hammers and drills can damage the permanent feed, so that in the end not only the perforated brick but also part of the permanent feed surrounding it must be repaired.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Vorrichtung zum Ausbau von Lochsteinen zu schaffen, mit der diese Arbeit präzise, ohne Beschädigungen des Dauerfutters des möglichst heißen Gefäßes und mit einem minimalen Kraftaufwand möglich sowie von ungelernten, d.h. nicht eigens eingeschulten Arbeitskräften durchführbar ist.The invention aims to avoid these disadvantages and difficulties and has as its object to provide a device for removing perforated bricks, with which this work can be carried out precisely, without damaging the permanent lining of the hotest possible vessel and with a minimum of effort, and by unskilled, i.e. is not feasible for specially trained workers.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Vorrichtung ein an der Außenseite des metallurgischen Gefäßes abstützbares Maschinengestell aufweist, in dem eine sich in Achsrichtung des Lochsteines erstreckende und in dieser Achsrichtung mittels eines Auszieh-­Druckmittelzylinders längsverstellbare Auszieheinrichtung gelagert ist, wobei an dem durch den Lochstein zum Inneren des metallurgischen Gefäßes führbaren Ende der Auszieheinrichtung mindestens zwei Klemmklauen befestigt sind, die mittels einer Spreizeinrichtung mit dem Lochstein in und außer Eingriff bringbar sind.This object is achieved in that the device has a machine frame which can be supported on the outside of the metallurgical vessel and in which a pulling device which extends in the axial direction of the perforated brick and is longitudinally adjustable in this axial direction by means of a pull-out pressure medium cylinder is mounted, on which the perforated brick at least two clamping claws are fastened to the interior of the metallurgical vessel guidable end of the pull-out device and can be brought into and out of engagement with the perforated brick by means of a spreading device.

Aus der DE-A - 33 30 105 ist es bekannt, zum Ausbau eines Gasspülsteines ein Gestell an der Außenseite des metallurgischen Gefäßes anzusetzen, in dem eine relativ zu diesem axial verschiebliche Zugstange angeordnet ist, die mittels eines Kupplungsbolzens an eine an den Gasspülstein anzuschweißende Rohrverlängerung kuppelbar ist. Die Zugstange ist mittels einer Antriebseinrichtung in Achsrichtung zum Ausziehen des Gasspülsteines bewegbar. Diese bekannte Vorrichtung ist jedoch zum Lockern und Ausbau von Lochsteinen nicht geeignet.From DE-A - 33 30 105 it is known to place a frame on the outside of the metallurgical vessel for removing a gas purging plug, in which a pull rod which is axially displaceable relative to this is arranged and which is connected by means of a coupling bolt to a pipe extension to be welded to the gas purging plug can be coupled. The pull rod can be moved in the axial direction by means of a drive device for pulling out the gas purging plug. However, this known device is not suitable for loosening and removing perforated stones.

Eine besonders einfache und kostengünstige Konstruktion ist erfindungsgemäß dadurch gekennzeichnet, daß das Maschinengestell an der Abstichöffnung mittels des Auszieh-Druckmittelzylinders abgestützt ist und die Auszieheinrichtung an dem Maschinengestell in unterschiedlichen Längsstellungen befestigbar ist, wobei vorzugsweise die Auszieheinrichtung aus einer Spann-­Zugstange, einem koaxial zur Spann-Zugstange angeordneten Klemmklauen-Tragrohr und einem koaxial äußeren und gegenüber dem Klemmklauen-Tragrohr längsverschieblichen und drehbaren Stützrohr gebildet ist und wobei zur Befestigung der Auszieheinrichtung am Maschinengestell das Maschinengestell mindestens ein Langloch aufweist, in das wahlweise mindestens einer von in Längsrichtung des Stützrohres hintereinander angeordneten und an diesem befestigten Zapfen einsetzbar ist.A particularly simple and inexpensive construction is characterized according to the invention in that the machine frame is supported on the tap opening by means of the pull-out pressure medium cylinder and the The pull-out device can be fastened to the machine frame in different longitudinal positions, the pull-out device preferably being formed from a tensioning pull rod, a clamping claw support tube arranged coaxially to the tensioning pull rod and a coaxial outer and rotatable support tube which is longitudinally displaceable and rotatable relative to the clamping claw support tube, and wherein for fastening the pull-out device on the machine frame, the machine frame has at least one elongated hole, into which at least one of the pins arranged one behind the other in the longitudinal direction of the support tube and fastened thereon can be inserted.

Nach einer bevorzugten Ausführungsform ist das Maschinengestell von einer die Abstichöffnung überragenden Brücke gebildet, die an einem Ende mittels einer Aufhängung am metallurgischen Gefäß befestigt, vorzugsweise gelenkig befestigt ist und deren anderes Ende unter Zwischenschaltung des Auszieh-Druckmittelzylinders am metallurgischen Gefäß abgestützt ist, wobei zweckmäßig der Auszieh-Druckmittelzylinder mittels einer am Maschinengestell befestigten Handpumpe betätigbar ist.According to a preferred embodiment, the machine frame is formed by a bridge projecting beyond the tap opening, which is attached at one end to the metallurgical vessel by means of a suspension, preferably articulated and whose other end is supported on the metallurgical vessel with the interposition of the pull-out pressure medium cylinder, the expediently the Pull-out pressure medium cylinder can be actuated by means of a hand pump attached to the machine frame.

Vorzugsweise weist hierbei die Spreizeinrichtung ein Keilstück auf, das zwischen Gleitflächen der Klemmklauen angeordnet ist und von der Spann-Zugstange betätigbar ist, wobei die Spann-Zugstange am freien Ende der Auszieheinrichtung mittels einer Spanneinrichtung, wie einer Spannmutter abstützbar ist.In this case, the spreading device preferably has a wedge piece which is arranged between sliding surfaces of the clamping claws and can be actuated by the tensioning pull rod, the tensioning pull rod being able to be supported at the free end of the pull-out device by means of a tensioning device, such as a tensioning nut.

Eine besonders einfach zu bedienende Vorrichtung ist dadurch gekennzeichnet, daß die Ausziehstange mittels eines koaxial zu dieser angeordneten Ringkolbens eines doppelseitig beaufschlagbaren Auszieh-Druckmittelzylinders bewegbar ist, wobei der Auszieh-Druckmittelzylinder mit seiner Frontseite am metallurgischen Gefäß abstützbar ist und die Ausziehstange den Ringkolben durchsetzt.A particularly easy-to-use device is characterized in that the pull-out rod can be moved by means of an annular piston which is arranged coaxially thereto and a pull-out pressure medium cylinder which can be acted on from both sides, the front of the pull-out pressure medium cylinder being supported on the metallurgical vessel and the pull-out rod penetrates the ring piston.

Vorzugsweise weist für diese Ausführungsform die Spreizeinrichtung ein Keilstück auf, das zwischen Gleitflächen der Klemmklauen angeordnet ist und ist von einer die Ausziehstange koaxial durchsetzenden Spannstange betätigbar, wobei die Spannstange am freien Ende der Ausziehstange mittels einer Spanneinrichtung, wie einem doppelseitig beaufschlagbaren Spann-Druckmittelzylinder, dessen Kolben mit der Spannstange und dessen Zylinder mit der Ausziehstange verbunden ist, abgestützt ist.For this embodiment, the spreading device preferably has a wedge piece, which is arranged between sliding surfaces of the clamping claws, and can be actuated by a tensioning rod which coaxially penetrates the extension rod, the tensioning rod at the free end of the extension rod using a tensioning device, such as a tensioning pressure medium cylinder which can be acted upon on both sides Piston is supported with the tension rod and its cylinder is connected to the pull-out rod.

Zur Vermeidung von Bedienungsfehlern sind vorteilhaft sowohl der Auszieh- als auch der Spann-Druckmittelzylinder mittels eines einzigen Ventiles betätigbar, wobei der Spann-Druckmittelzylinder ein kleineres Volumen aufweist als der Auszieh-Druckmittelzylinder und die von dem Ventil zum Auszieh-Druckmittelzylinder vorgesehenen Druckmittelleitungen mit Drosselventilen versehen sind.To avoid operating errors, both the pull-out and the clamping pressure medium cylinders can advantageously be actuated by means of a single valve, the clamping pressure medium cylinder having a smaller volume than the pull-out pressure medium cylinder and the pressure medium lines provided from the valve to the pull-out pressure medium cylinder being provided with throttle valves are.

Um die Vorrichtung einfach in Betrieb nehmen zu können, ohne an in der Halle vorgesehene Druckmittelleitungen gbunden zu sein, ist zweckmäßig in dem Maschinengestell ein Hydraulikaggregat mit einem elektrisch betriebenen Motor für die Druckmittelzylinder vorgesehen.In order to be able to put the device into operation easily without being tied to pressure medium lines provided in the hall, a hydraulic unit with an electrically operated motor for the pressure medium cylinders is expediently provided in the machine frame.

Um für unterschiedliche metallurgische Gefäße eingesetzt werden zu können, sind zweckmäßig an den Klemmklauen Greifbacken lösbar befestigt, die gegen Greifbacken unterschiedlicher Bauart austauschbar sind.In order to be able to be used for different metallurgical vessels, gripping jaws which are interchangeable with gripping jaws of different types are expediently attached to the clamping claws.

Die Erfindung ist nachfolgend anhand der Zeichnung näher erläutert, wobei die Fig. 1 und 2 eine Vorrichtung nach einer ersten Ausführungsform in Verwendung bei einer geschnitten dargestellten Konverterabstichöffnung zeigen. Fig. 3 ist eine Darstellung eines entlang der Linie III-­ III der Fig. 2 geführten Schnittes. In den Fig. 4 bis 8 ist eine zweite Ausführungsform veranschaulicht, wobei Fig. 4 eine Draufsicht auf die in die Abstichöffnung eingesetzte Vorrichtung und die Fig. 5 und 6 zugehörige Schnittdarstellungen der Vorrichtung in unterschiedlichen Betriebsstellungen veranschaulichen. Fig. 7 ist ein Detail der Fig. 5 in vergrößertem Maßstab, Fig. 8 gibt das Hydraulikschema für die zweite Ausführungsform wieder.The invention is explained in more detail below with reference to the drawing, with FIGS. 1 and 2 showing a device according to a first embodiment in use with a converter tap opening shown in section. Fig. 3 is an illustration of a along line III- III of Fig. 2 performed section. 4 to 8 illustrate a second embodiment, FIG. 4 illustrating a top view of the device inserted into the tap opening and FIGS. 5 and 6 associated sectional views of the device in different operating positions. 7 is a detail of FIG. 5 on an enlarged scale, FIG. 8 shows the hydraulic diagram for the second embodiment.

Gemäß den Fig. 1 und 2 sind in einem Konverterabstich 1 mehrere koaxial angeordnete Lochsteine 2, die als Wechselsteine ausgebildet sind, eingesetzt. Zum Ausbau dieser Lochsteine 2 ist der Konverterabstich 1 mit seiner Achse 3 durch Kippen des Konverters in eine etwa horizontale Lage zu bringen. Der Ausbau der Lochsteine 2 erfolgt von der vor dem Konverterabstich 1 aufgestellten Arbeitsbühne 4. Die Lochsteine 2 sind an einer Abstichbrille 5 des Konverterabstiches 1 mittels einer von Keilen 6 gebildeten Steinsicherung gesichert.1 and 2, a plurality of coaxially arranged perforated stones 2, which are designed as interchangeable stones, are used in a converter tapping 1. To remove these perforated blocks 2, the converter tapping 1 with its axis 3 must be brought into an approximately horizontal position by tilting the converter. The perforated stones 2 are removed from the work platform 4 installed in front of the converter tapping 1. The perforated stones 2 are secured to a pair of tapping glasses 5 of the converter tapping 1 by means of a stone lock formed by wedges 6.

Die Vorrichtung zum Ausbauen der Lochsteine 2 weist ein Maschinengestell 7 auf, welches von einer die Abstichöffnung 8 überspannenden Brücke 9 gebildet ist. Die Brücke 9 ist einerseits mit einer Strebe 10 an der Abstichbrille 5 abgestützt und hängt mittels eines Aufhängebügels 11, der die Abstichbrille 5 klammerartig übergreift, an dieser.The device for removing the perforated blocks 2 has a machine frame 7, which is formed by a bridge 9 spanning the tap opening 8. The bridge 9 is supported on the one hand with a strut 10 on the tapping glasses 5 and hangs on the tapping glasses 5 by means of a suspension bracket 11 which engages over the tapping glasses 5 in a clamp-like manner.

Am gegenüberliegenden Ende der Brücke 9 ist ein Auszieh-­Druckmittelzylinder 12 gelenkig befestigt, dessen Kolben 13 sich an der Abstichbrille 5 abstützt. Durch Betätigen des Auszieh-Druckmittelzylinders 12, der vorzugsweise als hydraulischer Druckmittelzylinder ausgebildet ist, kann die Brücke 9 von der Abstichöffnung 8 wegbewegt werden. Um eine Schwenkbewegung der Brücke 9 zu ermöglichen, ist die Brücke mit dem Aufhängebügel 11 gelenkig verbunden.At the opposite end of the bridge 9, a pull-out pressure medium cylinder 12 is articulated, the piston 13 of which is supported on the tapping glasses 5. By actuating the pull-out pressure medium cylinder 12, which is preferably designed as a hydraulic pressure medium cylinder, the bridge 9 can be moved away from the tap opening 8. In order to enable a pivoting movement of the bridge 9, the bridge is articulated to the suspension bracket 11.

Die Brücke 9 umfaßt, wie aus Fig. 3 ersichtlich ist, zwei parallel liegende, die Abstichöffnung 8 überspannende Träger 14, die jeweils im Bereich über der Abstichöffnung 8 mit einem Langloch 15 ausgestattet sind. Zwischen die Träger 14 ist eine Auszieheinrichtung einsetzbar, die von einem Klemmklauen-Tragrohr 16, einem zu diesem koaxial äußeren und gegenüber dem Klemmklauen-Tragrohr 16 axial verschiebbaren und verdrehbaren Stützrohr 17 sowie einer das Klemmklauen-Tragrohr 16 zentral durchsetzenden Zug-­Spannstange 22 gebildet ist. An dem Stützrohr 17 sind außenseitig in Längsrichtung hintereinander liegende und diametral zur Längsachse 18 der Auszieheinrichtung einander paarweise gegenüberliegende Zapfen 19 angeordnet, wobei sämtliche Zapfen 19 in einer Ebene liegen.As can be seen from FIG. 3, the bridge 9 comprises two parallel supports 14 spanning the tap opening 8, each of which is provided with an elongated hole 15 in the area above the tap opening 8. A pull-out device can be inserted between the supports 14, which is formed by a clamping claw support tube 16, an axially displaceable and rotatable support tube 17 relative thereto and axially displaceable and rotatable with respect to the clamping claw support tube 16, and a pull-tension rod 22 which penetrates the clamping claw support tube 16 centrally . On the support tube 17 are arranged on the outside in the longitudinal direction one behind the other and diametrically opposite to the longitudinal axis 18 of the pulling device in opposite pins 19, all pins 19 lying in one plane.

Werden die Zapfen 19 mit ihren Längsachsen parallel zu den Längsachsen der Langlöcher 15 ausgerichtet, ist die Auszieheinrichtung zwischen den Trägern 14 der Brücke 9 in Längsrichtung verschiebbar. Bei Drehung des Stützrohres 17 um 90° gelangen zwei einander gegenüberliegende Zapfen 19 mit den Langlöchern 15 in Eingriff und das Stützrohr 17 ist in Längsrichtung gegenüber der Brücke 9 fixiert.If the pins 19 are aligned with their longitudinal axes parallel to the longitudinal axes of the elongated holes 15, the pull-out device can be displaced in the longitudinal direction between the supports 14 of the bridge 9. When the support tube 17 is rotated by 90 °, two pins 19 lying opposite one another engage with the elongated holes 15 and the support tube 17 is fixed in the longitudinal direction with respect to the bridge 9.

Am vorderen Ende des Klemmklauen-Tragrohres 16 sind mindestens zwei sich vertikal öffnende Klemmklauen 20 gelenkig befestigt, die an ihrer Außenseite mit den Ausziehsteinen in Kontakt gelangende austauschbare Greifbacken 21 aufweisen. Zur Spreizung der Klemmklauen 20 dient ein Keilstück 23, das an dem vorderen Ende der Spann-Zugstange 22 befestigt ist und an an den Klemmklauen 20 vorgesehenen Gleitflächen 23ʹ anliegt. Am hinteren, aus dem Klemmklauen-Tragrohr 16 herausragenden Ende weist die Spann-Zugstange 22 ein Gewinde auf, auf dem eine gegen das hintere Ende des Klemmklauen-Tragrohres 16 sowie des Stützrohres 17 abstützbare Spannmutter 24 aufgeschraubt ist. Zur Betätigung der Spannmutter 24 ist diese mit Handgriffen 25 versehen.At the front end of the clamping claw support tube 16, at least two vertically opening clamping claws 20 are articulated, which have exchangeable gripping jaws 21 on their outside that come into contact with the extracting stones. A wedge piece 23 is used to spread the clamping claws 20, which is attached to the front end of the tensioning pull rod 22 and bears against sliding surfaces 23 'provided on the clamping claws 20. At the rear end protruding from the clamping claw support tube 16, the tensioning pull rod 22 has a thread on which a tension nut 24, which can be supported against the rear end of the clamping claw support tube 16 and the support tube 17, is screwed. To actuate the clamping nut 24, this is with Handles 25 provided.

An der Brücke ist eine mit dem Auszieh-Druckmittelzylinder 12 gekoppelte hydraulische Handpumpe 26 befestigt, deren Betätigungshebel mit 27 bezeichnet ist.Attached to the bridge is a hydraulic hand pump 26 coupled to the pull-out pressure medium cylinder 12, the actuating lever of which is designated 27.

Die Funktion der Einrichtung ist folgende:The function of the facility is as follows:

Nach Kippen des Konverters in eine Lage, in der die Achse 3 des Konverterabstiches 1 etwa horizontal zu liegen kommt, werden die Steinsicherungen 6 entfernt. Danach wird die Auszieheinrichtung in die Abstichöffnung 8 eingeführt, bis die Greifbacken 21 der Klemmklauen 20 in vertikal zu öffnender Stellung bei der ersten Steinfuge zu liegen kommen. Danach werden mittels der Spannmutter 24 die Klemmklauen 20 so weit gespreizt, bis die Greifbacken 21 in die erste Steinfuge eingreifen. Die Zapfen 19 des Stützrohres 17 liegen, wie in Fig. 1 dargestellt, mit ihren Achsen in einer vertikalen Ebene.After tilting the converter into a position in which the axis 3 of the converter tapping 1 comes to lie approximately horizontally, the stone fuses 6 are removed. The pulling device is then inserted into the tap opening 8 until the gripping jaws 21 of the clamping claws 20 come to rest in the vertically openable position at the first stone joint. Then the clamping claws 20 are spread by means of the clamping nut 24 until the gripping jaws 21 engage in the first stone joint. The pins 19 of the support tube 17 lie, as shown in Fig. 1, with their axes in a vertical plane.

Anschließend wird die Brücke 9 über die Auszieheinrichtung geschoben und mit dem Aufhängebügel 11 an der Abstichbrille 5 eingehängt. Der Kolben 13 des Auszieh-­Druckmittelzylinders 12 ist in eingezogener und das Stützrohr 17 in hinterster Position, in der es sich möglichst nahe bei der Spannmutter 24 befindet. Durch Drehen des Stützrohres 17 um 90° gelangen zwei der Zapfen 19 mit den Langlöchern 15 in Eingriff. Danach wird sicherheitshalber die Spannmutter 24 zum Nachspannen der Klemmklauen 20 nochmals betätigt.The bridge 9 is then pushed over the pull-out device and hung on the tapping glasses 5 with the suspension bracket 11. The piston 13 of the pull-out pressure medium cylinder 12 is in the retracted position and the support tube 17 in the rearmost position, in which it is as close as possible to the clamping nut 24. By rotating the support tube 17 by 90 °, two of the pins 19 engage with the elongated holes 15. Then, for the sake of safety, the clamping nut 24 is actuated again to retighten the clamping claws 20.

Anschließend wird durch Pumpen mittels der Handpumpe 26 bei geschlossener Stellung ihrer Öldruckentlastungsschraube der Kolben 13 des Auszieh-­Druckmittelzylinders 12 ausgefahren, wodurch die Brücke 9 die Spann-Zugstange 22 über das Stützrohr 17 und die Spannmutter 24 und mit ihr die Klemmklauen 20 sowie das Klemmklauen-Tragrohr 16 in Achsrichtung aus der Abstichöffnung 8 herausbewegt und der erste Lochstein 2 gelockert wird.Then the piston 13 of the pull-out pressure medium cylinder 12 is extended by pumping by means of the hand pump 26 when its oil pressure relief screw is in the closed position, as a result of which the bridge 9, the tensioning pull rod 22 via the support tube 17 and the Clamping nut 24 and with it the clamping claws 20 and the clamping claw support tube 16 are moved out of the tap opening 8 in the axial direction and the first perforated brick 2 is loosened.

Durch Öffnen der Öldruckentlastungsschraube an der Hydraulikpumpe 26 gelangt die Brücke 9 wieder in ihre Ausgangsposition und kann nach Drehen des Stützrohres 17 um 90° in die in Fig. 1 dargestellte Position von der Abstichbrille 5 abgehoben werden, worauf der erste Lochstein 2 mittels der Auszieheinrichtung entnommen werden kann. Das Ausbauen der weiteren Lochsteine 2 geschieht in analoger Weise.By opening the oil pressure relief screw on the hydraulic pump 26, the bridge 9 returns to its starting position and, after the support tube 17 has been rotated by 90 ° into the position shown in FIG. 1, can be lifted off the tapping glasses 5, whereupon the first perforated brick 2 is removed by means of the pulling device can be. The further perforated blocks 2 are removed in an analogous manner.

Gemäß der in den Fig. 4 bis 8 dargestellten Ausführungsform weist die Vorrichtung eine sich an einer Schiebergrundplatte 28 eines (bereits demontierten) Schieberverschlusses einer Pfanne abstützende Frontplatte 29 auf, an der der Auszieh-Druckmittelzylinder 30, der in diesem Fall als doppelt wirkender Hydraulikzylinder mit einem Ringkolben 31 ausgebildet ist, angeordnet ist. Die Ausziehstange 32 ist am Ringkolben, den sie zentral durchsetzt, befestigt und durchsetzt weiters den Zylinderboden des Auszieh-Druckmittelzylinders 30. An ihrem hinteren Ende ist ein Spann-Druckmittelzylinder 33, der ebenfalls als doppelt wirkender Hydraulikzylinder ausgebildet ist, angeordnet, dessen Kolben 34 mit der das Keilstück 35 zum Spreizen der Klemmklauen 36 aufweisenden Spannstange 37 verbunden ist. Der Zylinder 38 des Spann-­Druckmittelzylinders 33 ist am Ende der Ausziehstange 32 befestigt. Die Spannstange 37 durchsetzt die Ausziehstange 32 koaxial.According to the embodiment shown in FIGS. 4 to 8, the device has a front plate 29 supported on a slide base plate 28 of a (already dismantled) slide closure of a pan, on which the pull-out pressure medium cylinder 30, which in this case acts as a double-acting hydraulic cylinder an annular piston 31 is formed, is arranged. The pull-out rod 32 is fastened to the annular piston, which it passes through centrally, and also passes through the cylinder base of the pull-out pressure medium cylinder 30. At its rear end, a tensioning pressure medium cylinder 33, which is also designed as a double-acting hydraulic cylinder, is arranged, the piston 34 of which also which is connected to the wedge piece 35 for expanding the clamping claws 36 having tension rod 37. The cylinder 38 of the clamping pressure medium cylinder 33 is attached to the end of the pull-out rod 32. The tension rod 37 passes through the pull-out rod 32 coaxially.

An den Auszieh-Druckmittelzylinder 30 schließt eine als zylindrisches Rohr ausgebildete und so den Spann-­Druckmittelzylinder 33 aufnehmende und schützende Konsole 39 an, an deren hinterem Ende ein Hydraulikaggregat 40 befestigt ist, das einen elektrisch betriebenen Motor 41, eine Hydraulikpumpe 42, einen Tank 43 und ein Steuerventil 44 aufweist. Von dem Tank 43 bzw. dem Steuerventil 44 des Hydraulikaggregates 40 führen Druckmittelleitungen 45, 46 einerseits zum Auszieh-Druckmittelzylinder 30 und andererseits zum Spann-Druckmittelzylinder 33.Connected to the pull-out pressure medium cylinder 30 is a console designed as a cylindrical tube and thus receiving and protecting the clamping pressure medium cylinder 33 39, at the rear end of which a hydraulic unit 40 is fastened, which has an electrically operated motor 41, a hydraulic pump 42, a tank 43 and a control valve 44. Pressure medium lines 45, 46 lead from the tank 43 or the control valve 44 of the hydraulic unit 40 to the pull-out pressure medium cylinder 30 on the one hand and to the clamping pressure medium cylinder 33 on the other hand.

Zum manuellen Führen der an einem Krangehänge über Aufhängeösen 47, deren Verbindungsachse etwa durch den Schwerpunkt der Vorrichtung geht, hängenden Vorrichtung dient eine am hinteren Ende angeordnete Balancierstange 48 mit beiderseits vorragenden Handgriffstücken 49. Von diesen Handgriffstücken 49 aus kann der Bedienungsmann Druckknöpfe 49ʹ für die Steuerung der Vorrichtung bedienen sowie die etwa im Schwerpunkt aufgehängte Vorrichtung in horizontaler und vertikaler Richtung balancieren.For manually guiding the device hanging on a crane suspension via suspension eyes 47, the connection axis of which passes approximately through the center of gravity of the device, a balancing rod 48 arranged at the rear end is used with protruding handle pieces 49. From these handle pieces 49, the operator can press buttons 49ʹ for the control operate the device and balance the device suspended approximately in the center of gravity in the horizontal and vertical directions.

In den zum Auszieh-Druckmittelzylinder 30 führenden Druckmittelleitungen 45, 46 sind Drosselventile 50 vorgesehen, so daß bei Verschieben des Steuerventiles 44 in Position A zunächst Druckmittel in den Spann-­Druckmittelzylinder 33 und erst verzögert in den Auszieh-­Druckmittelzylinder 30 gelangt. Beim Lösen der Klemmklauen 36 vom Lochstein 2, zu welchem Zweck das Ventil in die Position B verschoben wird, wird ebenfalls infolge der Verzögerung durch die Drosselventile 50 zunächst der Spann-Druckmittelzylinder 33 beaufschlagt und erst danach der Auszieh-Druckmittelzylinder 30.Throttle valves 50 are provided in the pressure medium lines 45, 46 leading to the pull-out pressure medium cylinder 30, so that when the control valve 44 is moved into position A, pressure medium first enters the tensioning pressure medium cylinder 33 and only after a delay enters the pull-out pressure medium cylinder 30. When the clamping claws 36 are released from the perforated brick 2, for which purpose the valve is moved to position B, the clamping pressure medium cylinder 33 is also acted on first because of the delay caused by the throttle valves 50, and only then is the pulling out pressure medium cylinder 30.

Die Klemmmklauen 36 sind auch bei dieser Ausführungsform aus zwei gelenkig gelagerten Hälften, die zueinander eine Öffnungs- und Schließbewegung ähnlich einer Zange zulassen, gebildet. Durch Verschieben des Keilstückes 35, das auch kugelförmig gestaltet sein kann, entlang der gegeneinander geneigten Gleitflächen 35ʹ der Klemmklauen 36 wird das Auseinanderspreizen der Klemmklauen 36 nach dem "Ziehkeilprinzip" bewirkt. An den Klemmklauen 36 sind Greifbacken 51 befestigt, vorzugsweise angeschraubt, an deren Oberfläche Sägezähne mit Riefen vorgesehen sind.In this embodiment as well, the clamping claws 36 are formed from two articulated halves which, relative to one another, permit an opening and closing movement similar to a pair of pliers. By moving the wedge piece 35, which can also be spherical, along the mutually inclined sliding surfaces 35ʹ of the clamping claws 36 the spreading apart of the clamping claws 36 is effected according to the "pull wedge principle". Gripping jaws 51 are fastened, preferably screwed, to the clamping claws 36, on the surface of which saw teeth with grooves are provided.

Durch Spannen der Klemmklauen 36 kann, wie in Fig. 6 dargestellt, eine formschlüssige Verbindung mit dem Lochstein 2 hergestellt werden. Bei einem starken Verschleiß des Lochsteines 2, wenn dieser z.B. nicht mehr eine Kante an seinem Ende aufweist, kann mittels der Klemmklauen 36 eine kraftschlüssige Verbindung zu dem Lochstein 2 hergestellt werden. Die Greifbacken 51 sind zweckmäßig austauschbar, um den Einsatzbereich der Vorrichtung an verschiedene Lochsteindurchmesser anzupassen. Beim Entspannen werden die Klemmklauen 36 durch eine Rückholfeder 52 wiederum in die Ausgangslage gegeneinander gezogen, wodurch der Lochstein 2 von der Ausziehstange 32 entfernt werden kann.By clamping the clamping claws 36, as shown in FIG. 6, a positive connection with the perforated brick 2 can be produced. If the perforated brick 2 is badly worn, e.g. no longer has an edge at its end, a non-positive connection to the perforated brick 2 can be established by means of the clamping claws 36. The gripping jaws 51 are expediently interchangeable in order to adapt the area of use of the device to different perforated stone diameters. When relaxing, the clamping claws 36 are pulled against each other by a return spring 52 into the starting position, whereby the perforated brick 2 can be removed from the pull-out rod 32.

Die Funktion der Einrichtung ist folgende:The function of the facility is as follows:

Die Vorrichtung wird an ihren Aufhängeösen 47 an einem Hebezeug aufgehängt und mittels der Balancierstange 48 in Position gebracht. Für die Energiezufuhr reicht ein Elektroanschluß für den Elektromotor 41. Der Bedienungsmann führt die Ausziehstange 32 in den Lochstein 2 ein, nachdem er eventuell vorher die Klemmklauen 36 mittels der Greifbacken 51 an den Lochsteindurchmesser angepaßt hat. Vor dem Einführen ist die Hydraulik einzuschalten und das Steuerventil 44 in Stellung B zu schieben, damit der Spann-Druckmittelzylinder 33 entspannt ist und der Kolben 31 des Auszieh-Druckmittelzylindrs 30 in die vordere Endstellung fährt.The device is suspended from its lifting eyes 47 on a hoist and brought into position by means of the balancing rod 48. An electrical connection for the electric motor 41 is sufficient for the energy supply. The operator inserts the pull-out rod 32 into the perforated brick 2 after he has possibly previously adapted the clamping claws 36 to the perforated brick diameter by means of the gripping jaws 51. Before insertion, the hydraulics must be switched on and the control valve 44 pushed into position B, so that the clamping pressure medium cylinder 33 is relaxed and the piston 31 of the pull-out pressure medium cylinder 30 moves into the front end position.

Sobald die Vorrichtung, wie in Fig. 4 dargestellt, eingeführt ist und die Frontplatte 29 des Auszieh-­ Druckmittelzylinders 30 an der Schiebergrundplatte 28 aufsitzt, wird das Ventil auf Spannen und Ausziehen (Position A) umgesteuert. Ist der Lochstein 2 losgebrochen, kann nach Erreichen der hinteren Endstellung des Ringkolbens 31 des Auszieh-Druckmittelzylinders 30 die Vorrichtung von der Abstichöffnung entfernt werden, wonach nach Entspannen der Spreizeinrichtung der verschlissene Lochstein 2 von den Klemmklauen 36 entfernt werden kann.As soon as the device, as shown in Fig. 4, is inserted and the front plate 29 of the pull-out Pressure medium cylinder 30 is seated on the slide base plate 28, the valve is switched over to tensioning and extending (position A). If the perforated brick 2 has broken loose, the device can be removed from the tap hole after reaching the rear end position of the annular piston 31 of the pull-out pressure medium cylinder 30, after which the worn perforated brick 2 can be removed from the clamping claws 36 after the spreader device has been relaxed.

Weist das Abstichloch mehrere hintereinander liegende Lochsteine auf, ist eine Vorrichtung mit einem längeren Ausziehhub zu verwenden oder die Ausziehstange 32 mit aufschraubbaren Zwischenstücken anzupassen.If the tap hole has a plurality of perforated stones lying one behind the other, a device with a longer pull-out stroke is to be used or the pull-out rod 32 is adapted with screw-on intermediate pieces.

Die Erfindung beschränkt sich nicht auf die in der Zeichnung dargestellten Ausführungsbeispiele, sondern kann in verschiedener Hinsicht modifiziert werden. Beispielsweise ist es möglich, die Spreizvorrichtung über ein Hebelsystem, wie ein Kniehebelsystem, zu betätigen. Die Vorrichtung kann weiters auf einem auf Arbeitsbühnen fahrbaren Manipulator montiert sein.The invention is not limited to the exemplary embodiments shown in the drawing, but can be modified in various ways. For example, it is possible to actuate the spreading device via a lever system, such as a toggle lever system. The device can also be mounted on a manipulator that can be moved on working platforms.

Claims (11)

1. Vorrichtung zum Ausbau von in die Abstichöffnung (8) metallurgischer Gefäße eingesetzten Lochsteinen (2), dadurch gekennzeichnet, daß die Vorrichtung ein an der Außenseite des metallurgischen Gefäßes abstützbares Maschinengestell (7; 29, 39) aufweist, in dem eine sich in Achsrichtung des Lochsteines (2) erstreckende und in dieser Achsrichtung mittels eines Auszieh-­Druckmittelzylinders (12; 30) längsverstellbare Auszieheinrichtung (16, 17, 22; 32) gelagert ist, wobei an dem durch den Lochstein (2) zum Inneren des metallurgischen Gefäßes führbaren Ende der Auszieheinrichtung (16; 32) mindestens zwei Klemmklauen (20; 36) befestigt sind, die mittels einer Spreizeinrichtung (23, 24; 33, 35) mit dem Lochstein (2) in und außer Eingriff bringbar sind.1. A device for removing perforated stones (2) inserted into the tap opening (8) of metallurgical vessels, characterized in that the device has a machine frame (7; 29, 39) which can be supported on the outside of the metallurgical vessel and in which one extends in the axial direction of the perforated brick (2) and in this axial direction by means of a pull-out pressure medium cylinder (12; 30) longitudinally adjustable pulling device (16, 17, 22; 32) is mounted, at the end that can be guided through the perforated brick (2) to the interior of the metallurgical vessel the pull-out device (16; 32) at least two clamping claws (20; 36) are fastened, which can be brought into and out of engagement with the perforated brick (2) by means of a spreading device (23, 24; 33, 35). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Maschinengestell (7) an der Abstichöffnung (8) mittels des Auszieh-Druckmittelzylinders (12) abgestützt ist und die Auszieheinrichtung (16, 17, 22) an dem Maschinengestell (7) in unterschiedlichen Längsstellungen befestigbar ist (Fig. 1 bis 3).2. Device according to claim 1, characterized in that the machine frame (7) is supported at the tap opening (8) by means of the pull-out pressure medium cylinder (12) and the pull-out device (16, 17, 22) on the machine frame (7) in different ways Longitudinal positions can be attached (Fig. 1 to 3). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Auszieheinrichtung aus einer Spann-Zugstange (22), einem koaxial zur Spann-Zugstange angeordneten Klemmklauen-Tragrohr (16) und einem koaxial äußeren und gegenüber dem Klemmklauen-Tragrohr längsverschieblichen und drehbaren Stützrohr (17) gebildet ist, wobei zur Befestigung der Auszieheinrichtung (16, 17, 22) am Maschinengestell (7) das Maschinengestell mindestens ein Langloch (15) aufweist, in das wahlweise mindestens einer von in Längsrichtung des Stützrohres (17) hintereinander angeordneten und an diesem befestigten Zapfen (19) einsetzbar ist (Fig. 1 bis 3).3. Apparatus according to claim 2, characterized in that the pull-out device from a tensioning pull rod (22), a clamping claw supporting tube (16) arranged coaxially to the tensioning pull rod and a coaxial outer and longitudinally displaceable and rotatable support tube relative to the clamping claw supporting tube ( 17) is formed, with the machine frame having at least one elongated hole (15) for fastening the pull-out device (16, 17, 22) to the machine frame (7), into which at least one of the longitudinally arranged support tube (17) can be arranged one behind the other and on it fortified Pin (19) can be used (Fig. 1 to 3). 4. Vorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das Maschinengestell (7) von einer die Abstichöffnung überragenden Brücke (9) gebildet ist, die an einem Ende mittels einer Aufhängung (11) am metallurgischen Gefäß befestigt, vorzugsweise gelenkig befestigt ist und deren anderes Ende unter Zwischenschaltung des Auszieh-Druckmittelzylinders (12) am metallurgischen Gefäß abgestützt ist (Fig. 1 bis 3).4. Apparatus according to claim 2 or 3, characterized in that the machine frame (7) is formed by a bridge (9) projecting beyond the tap opening, which is fastened at one end to the metallurgical vessel by means of a suspension (11), preferably articulated and the other end of which is supported on the metallurgical vessel with the interposition of the pull-out pressure medium cylinder (12) (FIGS. 1 to 3). 5. Vorrichtung nach einem oder mehreren der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Auszieh-­Druckmittelzylinder (12) mittels einer am Maschinengestell (7) befestigten Handpumpe (26) betätigbar ist (Fig. 1 bis 3).5. The device according to one or more of claims 2 to 4, characterized in that the pull-out pressure medium cylinder (12) can be actuated by means of a hand pump (26) attached to the machine frame (7) (FIGS. 1 to 3). 6. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Spreizeinrichtung ein Keilstück (23) aufweist, das zwischen Gleitflächen (23ʹ) der Klemmklauen (20) angeordnet ist und von der Spann-Zugstange (22) betätigbar ist, wobei die Spann-Zugstange (22) am freien Ende der Auszieheinrichtung (16, 17, 22) mittels einer Spanneinrichtung, wie einer Spannmutter (24) abstützbar ist (Fig. 1 bis 3).6. The device according to one or more of claims 3 to 5, characterized in that the spreading device has a wedge piece (23) which is arranged between sliding surfaces (23ʹ) of the clamping claws (20) and can be actuated by the tensioning pull rod (22) , wherein the tensioning pull rod (22) can be supported at the free end of the pulling device (16, 17, 22) by means of a tensioning device, such as a tensioning nut (24) (FIGS. 1 to 3). 7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ausziehstange (32) mittels eines koaxial zu dieser angeordneten Ringkolbens (31) eines doppelseitig beaufschlagbaren Auszieh-Druckmittelzylinders (30) bewegbar ist, wobei der Auszieh-Druckmittelzylinder mit seiner Frontseite am metallurgischen Gefäß abstützbar ist und die Ausziehstange (32) den Ringkolben durchsetzt (Fig. 4 bis 8).7. The device according to claim 1, characterized in that the pull-out rod (32) is movable by means of an annular piston (31) arranged coaxially thereto, a double-acting pull-out pressure medium cylinder (30), the pull-out pressure medium cylinder with its front side being supported on the metallurgical vessel is and the pull-out rod (32) passes through the ring piston (Fig. 4 to 8). 8. Vorrichtung nach Anspruch 1 oder 7, dadurch gekennzeichnet, daß die Spreizeinrichtung ein Keilstück (35) aufweist, das zwischen Gleitflächen (35ʹ) der Klemmklauen (36) angeordnet ist und von einer die Ausziehstange (32) koaxial durchsetzenden Spannstange (37) betätigbar ist, wobei die Spannstange am freien Ende der Ausziehstange (32) mittels einer Spanneinrichtung, wie einem doppelseitig beaufschlagbaren Spann-Druckmittelzylinder (33), dessen Kolben (34) mit der Spannstange (37) und dessen Zylinder (38) mit der Ausziehstange (32) verbunden ist, abgestützt ist (Fig. 4 bis 8).8. Apparatus according to claim 1 or 7, characterized in that the spreading device has a wedge piece (35) which is arranged between sliding surfaces (35ʹ) of the clamping claws (36) and can be actuated by a tension rod (37) which coaxially penetrates the pull-out rod (32) the tensioning rod at the free end of the extension rod (32) by means of a tensioning device, such as a tensioning pressure medium cylinder (33) which can be acted on on both sides, the piston (34) of which is connected to the tension rod (37) and the cylinder (38) of which is the extension rod (32 ) is connected, is supported (Fig. 4 to 8). 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß sowohl der Auszieh- (30) als auch der Spann-­Druckmittelzylinder (33) mittels eines einzigen Ventiles (44) betätigbar sind, wobei der Spann-­Druckmittelzylinder (33) ein kleineres Volumen aufweist als der Auszieh-Druckmittelzylinder (30) und die von dem Ventil (44) zum Auszieh-Druckmittelzylinder (30) vorgesehenen Druckmittelleitungen (45, 46) mit Drosselventilen (50) versehen sind (Fig. 4 bis 8).9. The device according to claim 8, characterized in that both the pull-out (30) and the clamping pressure medium cylinder (33) can be actuated by means of a single valve (44), the clamping pressure medium cylinder (33) having a smaller volume than the pull-out pressure medium cylinder (30) and the pressure medium lines (45, 46) provided from the valve (44) to the pull-out pressure medium cylinder (30) are provided with throttle valves (50) (FIGS. 4 to 8). 10.Vorrichtung nach einem oder mehreren der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß in dem Maschinengestell (29, 39) ein Hydraulikaggregat (40) mit einem elektrisch betriebenen Motor (41) für die Druckmittelzylinder (30, 33) vorgesehen ist (Fig. 4 bis 8).10.The device according to one or more of claims 7 to 9, characterized in that in the machine frame (29, 39) a hydraulic unit (40) with an electrically operated motor (41) for the pressure medium cylinder (30, 33) is provided (Fig . 4 to 8). 11.Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß an den Klemmklauen (20; 36) Greifbacken (21; 51) lösbar befestigt sind, die gegen Greifbacken (21; 51) unterschiedlicher Bauart austauschbar sind.11.The device according to one or more of claims 1 to 10, characterized in that on the clamping claws (20; 36) gripping jaws (21; 51) are releasably attached, which are interchangeable with gripping jaws (21; 51) of different types.
EP19870890249 1986-11-13 1987-11-09 Installation for removing hollow bricks inserted in the tap holes of metallurgical vessels Expired - Lifetime EP0271474B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT301986A AT386422B (en) 1986-11-13 1986-11-13 DEVICE FOR REMOVING HOLE STONES INSERTED IN THE TAPPING OPENING OF METALLURGICAL VESSELS
AT3019/86 1986-11-13

Publications (2)

Publication Number Publication Date
EP0271474A1 true EP0271474A1 (en) 1988-06-15
EP0271474B1 EP0271474B1 (en) 1990-07-25

Family

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Application Number Title Priority Date Filing Date
EP19870890249 Expired - Lifetime EP0271474B1 (en) 1986-11-13 1987-11-09 Installation for removing hollow bricks inserted in the tap holes of metallurgical vessels

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EP (1) EP0271474B1 (en)
AT (1) AT386422B (en)
DE (1) DE3763966D1 (en)
ES (1) ES2016659B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110303147A (en) * 2019-07-25 2019-10-08 永兴特种不锈钢股份有限公司 One kind pouring the automatic extracting apparatus of ladle upper nozzle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA904465B (en) * 1989-06-09 1991-04-24 Boehler Pneumatik Int Gmbh Arrangement for the removal of worn nozzle bricks or brick linings in metallurgical vessels
LT3389B (en) 1990-06-08 1995-08-25 Veitsch Radex Ag Device for removing wearing fashion bricks with hole or lining
FR2685653B1 (en) * 1991-12-31 1994-04-01 Sollac DEVICE FOR REPAIRING THE INTERIOR COATING OF A CAST HOLE IN PARTICULAR OF A STEEL CONVERTER.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE672687A (en) * 1964-11-25 1966-03-16
GB1217401A (en) * 1967-03-03 1970-12-31 Metacon Ag Mounting apparatus for use in casting installations
FR2314086A2 (en) * 1975-06-13 1977-01-07 Usinor Tuyere extractor for blast furnaces - includes pneumatic hammer, and can also extract tymps
FR2454861A1 (en) * 1979-04-24 1980-11-21 Paris Acieries Laminoirs Extractor for removing nozzle brick from casting ladle - where extractor bar can withdraw nozzle brick while ladle is very hot
WO1985001068A1 (en) * 1983-08-20 1985-03-14 Brohltal-Deumag Ag Für Feuerfeste Erzeugnisse; Extractor for a gas blow brick

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE672687A (en) * 1964-11-25 1966-03-16
GB1217401A (en) * 1967-03-03 1970-12-31 Metacon Ag Mounting apparatus for use in casting installations
FR2314086A2 (en) * 1975-06-13 1977-01-07 Usinor Tuyere extractor for blast furnaces - includes pneumatic hammer, and can also extract tymps
FR2454861A1 (en) * 1979-04-24 1980-11-21 Paris Acieries Laminoirs Extractor for removing nozzle brick from casting ladle - where extractor bar can withdraw nozzle brick while ladle is very hot
WO1985001068A1 (en) * 1983-08-20 1985-03-14 Brohltal-Deumag Ag Für Feuerfeste Erzeugnisse; Extractor for a gas blow brick

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110303147A (en) * 2019-07-25 2019-10-08 永兴特种不锈钢股份有限公司 One kind pouring the automatic extracting apparatus of ladle upper nozzle

Also Published As

Publication number Publication date
ATA301986A (en) 1988-01-15
AT386422B (en) 1988-08-25
EP0271474B1 (en) 1990-07-25
DE3763966D1 (en) 1990-08-30
ES2016659B3 (en) 1990-11-16

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