EP0428661B1 - Device for removing worn nozzle bricks or nozzle linings from metallurgical vessels - Google Patents

Device for removing worn nozzle bricks or nozzle linings from metallurgical vessels Download PDF

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Publication number
EP0428661B1
EP0428661B1 EP90908154A EP90908154A EP0428661B1 EP 0428661 B1 EP0428661 B1 EP 0428661B1 EP 90908154 A EP90908154 A EP 90908154A EP 90908154 A EP90908154 A EP 90908154A EP 0428661 B1 EP0428661 B1 EP 0428661B1
Authority
EP
European Patent Office
Prior art keywords
tool carrier
toothed shaft
support
head
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90908154A
Other languages
German (de)
French (fr)
Other versions
EP0428661A1 (en
Inventor
Dieter Gortan
Erwin Garger
Peter Pacnik
Josef Mocivnik
Werner Schantl
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.)
BBG Baugeraete GmbH
Original Assignee
Veitsch Radex GmbH and Co OG
Veitscher Magnesitwerke AG
Boehler Pneumatik International GmbH
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
Application filed by Veitsch Radex GmbH and Co OG, Veitscher Magnesitwerke AG, Boehler Pneumatik International GmbH filed Critical Veitsch Radex GmbH and Co OG
Publication of EP0428661A1 publication Critical patent/EP0428661A1/en
Application granted granted Critical
Publication of EP0428661B1 publication Critical patent/EP0428661B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • C21C5/44—Refractory linings
    • C21C5/445—Lining or repairing the taphole
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1694—Breaking away the lining or removing parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1527—Taphole forming equipment, e.g. boring machines, piercing tools
    • 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
    • C21C5/44—Refractory linings
    • C21C2005/448—Lining wear indicators
    • 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 device for removing worn perforated bricks or linings in tap openings of metallurgical vessels with a spreading device which can be inserted into the perforated brick or the tap hole and a drive for pulling off the perforated brick or the lining by means of the spreading device.
  • the known device must first be brought manually into the correct position and fixed on the outside of the hot metallurgical vessel, the manipulation being complex in that when the perforated stone has actually loosened, the device and the hot perforated stone are removed manually must become.
  • perforated bricks cannot simply be pulled out of their position without damage to the permanent chuck by simply applying pressure or tension in the axial direction.
  • AT-PS 383 831 a device for pulling out a gas purging plug from a perforated brick has become known, in which the fact that a simple axial pull is not easily removed for safe loosening of the perforated stone is suitable.
  • Perforated stones are primarily used for tap openings, for example of converters, and the wear of such perforated stones results from contact with liquid metal during pouring.
  • the area of the tap openings is therefore usually provided with a two-layer perforated brick lining, the perforated brick elements to be replaced in each case being connected to the permanent lining by means of binders, ie the second perforated brick lining remaining in the metallurgical vessel over a longer period of time.
  • Such perforated stones connected with binders to the permanent feed in particular washed-out perforated stones, generally have to be chiseled out using pneumatic hammers or drilled out using drilling devices.
  • Hydraulic pulling devices such as those found in AT-PS 386 422, can usually only be regarded as successful if clamping claws reach behind the perforated brick on the inside to ensure sufficient tensile forces, although here too the risk of damage to the permanent feed is not automatically excluded can be.
  • the invention now aims to provide a device of the type mentioned, which allows all work steps to be carried out without additional manipulations, such as setting up a work platform, which are necessary for the complete replacement of perforated stones including the installation of a new perforated stone.
  • the device according to the invention essentially consists in the spreading device being arranged on a tool carrier which can be moved in the axial direction on a support, in particular a carriage, and in that the tool carrier can be connected to at least one drive.
  • the spreading device is arranged on a tool carrier that can be moved in the axial direction on a support, in particular a carriage, simple positioning and a sufficient working path are made available, with which different working steps in the installation and removal of perforated stones by simple exchange of tools can be carried out on the tool carrier.
  • the spreading device can be used both during the removal of the perforated brick and for the new insertion of a new perforated brick, wherein tools such as those which appear favorable for the complete clearing of the hole can also be fixed on such a spreading device.
  • the above-mentioned movability makes it possible, in addition to simply removing worn perforated bricks or linings, to also reposition new perforated bricks in the correct position, the movability of the tool holder on a support, in particular a mount, offering the possibility that Arrange the entire facility on a mobile undercarriage, which significantly simplifies the manipulation when removing and installing perforated bricks.
  • the fixing and support on the hot vessel wall is omitted, since the support or the carriage can be moved into the respective position with its own drive and the reaction forces can be absorbed by an undercarriage.
  • the use of a tool carrier allows other methods, such as in particular the cooling of the perforated brick, as preparation for the application, to be carried out via such a tool carrier.
  • Such cooling of the perforated stone as preparation for the application leads to residual stresses which support the pulling out of the closing stone or perforated stone and leads to protection of the extracting tool.
  • the tool carrier also allows, depending on the type of drive used, to achieve an impact-assisted pulling out or hammering out of perforated stones after the expansion, whereby drilling tools with which the opening for inserting the new perforated stone can be calibrated can also be fixed on such a tool carrier can.
  • a preassembled perforated brick package can be inserted over the tool carrier using the carriage.
  • the device according to the invention is advantageously designed such that the tool carrier has an axial cavity in which a toothed shaft is rotatably mounted, and that the toothed shaft is guided in the tool carrier so as to be displaceable in the radial direction with a toothing of at least two, preferably three Spreading jaws combs. If necessary, a rotating tool movement can be achieved via the rotatably mounted toothed shaft for drilling out or calibrating, the expanding jaws being able to be used directly to fix the calibration tool.
  • the expanding jaws are pressed against the inner wall of the perforated brick when the expanding jaws are extended and the tool holder can be hammered to facilitate removal of the perforated brick.
  • the design is advantageously made such that the tool carrier is rotatably mounted in the support or on the mount and can be locked in a rotationally fixed manner relative to the support or mount, whereby the lockability serves to apply the necessary spreading forces to enable the stone to be pulled out.
  • Various drives are advantageously connected to the tool carrier and the toothed shaft, it being possible to connect a rotary drive to the toothed shaft in a simple manner and an impact drive, in particular a counterblow hammer, to the tool carrier.
  • the percussion drive acts on the hollow tool carrier and thus on a correspondingly rigid tubular component, whereas the toothed shaft is used to transmit torques both for pressing the jaws and for rotatingly drilling the opening.
  • the design is advantageously made such that the toothed shaft has at least one axial channel which is connected to nozzles or outflow openings near the free end of the tool carrier and a connection for fluid .
  • a corresponding sealing closure can be achieved in a simple manner in that the toothed shaft itself has this axial channel for the supply of fluid, the feeding of fluid into the axial channel can be achieved in a particularly simple manner in that the fluid connection at the support or the mount has an annular channel, in which radial bores open to the axial channel of the toothed shaft.
  • the design is advantageously made such that the toothed shaft is connected to a rotary drive shaft in a rotationally fixed manner and displaceably in the axial direction.
  • the design is such that the head part of the tool carrier carrying the expanding jaws is detachably connected via a thread to the part of the tool carrier which can be connected to the impact drive, the head of the tool carrier can be removed in a simple manner from Detach the tool holder, and because of the connection of the toothed shaft with a rotary drive shaft, the toothed shaft can also be removed together with the head, so that other tools can be connected to the rotary drive shaft.
  • the design is advantageously made such that the thread for connecting the tool holder to the head part of the tool holder has a core diameter which is larger than the outer diameter of the toothed shaft connected to the rotary drive shaft, whereby all components of the tool carrier and the central drive shaft which are connected to one another in a rotationally locked manner can be removed to the front.
  • a drilling head can also be connected directly to the tool carrier with the device according to the invention, the design advantageously being such that a sleeve is screwed onto the thread, which has a round thread or a trapezoidal thread on its outside, on which a drill head can be screwed against a stop of the tool carrier.
  • a sleeve can be screwed onto the tool holder in a simple manner, the external thread of such a sleeve allowing the simple screwing on of a drill head using the rotary drive of the tool holder.
  • the drill head is screwed onto the round or trapezoidal thread up to a stop of the tool holder, whereby the same direction of rotation must naturally be maintained for the subsequent drilling in order to prevent the drill head from loosening from the thread. Otherwise, a separate rotation lock relative to the tool carrier would have to be provided in the screwed-on position of the drill head.
  • the drill head In order to enable screwing onto the external thread of the sleeve, the drill head must be held in a rotationally secure manner during screwing on, the design being advantageously made such that the drill head which can be screwed onto the sleeve has a stop for a separate anti-rotation lock, which has an unlockable stop cooperates on support. For the subsequent drilling operation, the separate anti-rotation lock must of course be released again.
  • FIG. 1 shows a side view of a device according to the invention fixed on a movable undercarriage; 2 shows, on an enlarged scale, the device according to the invention according to FIG. 1 in a section through the tool carrier; 3 in a view similar to FIG. 2 on a further enlarged scale, the head and the end of the tool carrier facing away from the head; Figures 4 and 5 sections along the line IV-IV of Figure 3 by an expanding jaw, Figure 4 represents the retracted position and Figure 5 shows the extended position of the expanding jaw; 6 shows a schematic illustration of the definition of a calibration tool on the device according to the invention; 7 shows, in a representation analogous to FIG.
  • FIG. 8 is an enlarged view of a partial section through a modified embodiment for fixing a drilling tool on the invention Facility; and
  • FIG. 9 shows a partial section along the line IX-IX of FIG. 8.
  • FIG. 1 denotes an undercarriage which can be moved on a crawler chassis 2, a support or a mount 8 being fixed on an arm 5 which can be raised and lowered via cylinder-piston units 3 and 4.
  • a tool carrier 9 which can be moved in the direction of the double arrow 7 by a cylinder-piston unit 6 and which is shown even more clearly in the following figures, and a striking tool designed as a counterblow hammer 10 are attached to the tool carrier 9 the double arrow 11 indicated striking movement.
  • the tool carrier for the removal, clearing and installation of perforated stones or tap openings of metallurgical vessels can be positioned according to the requirements relative to a tap hole of a converter, not shown, and the removal of a worn perforated brick or a worn lining as well as calibration and subsequent setting of a new lining without manual manipulation of an extractor attached directly to the metallurgical vessel. It can thus be operated with a single device, as shown in FIG. 1, and with a minimum of operating effort, a large number of tap openings even on different converters, and the arrangement of corresponding holding devices and pull-out devices in the area of each tap hole can be dispensed with will.
  • Both the toothed shaft 13 and the rotary drive shaft 14 have an axially extending channel 15 which opens into nozzles or outflow openings 17 in the region of the head 16 of the tool holder and which has a connection formed by radial channels 18 at the end opposite the tool holder head 16 has an annular space 19 for supplying a fluid.
  • In the area of the head 16 of the tool carrier there are further spreading jaws 20 which can be displaced in the radial direction relative to the toothed shaft and thus to the entire tool carrier.
  • the counterblow hammer 10 exerts its impact energy on two half shells 21 in the region of a closing part 22, the impact stress thus exerted by the counterblow hammer 10 in the sense of the double arrow 11 being transmitted to this outer tube via the transition piece screwed to the outer tube 23 of the tool carrier.
  • the tool carrier 9 is centered with its outer tube in a guide 24.
  • the torque is transmitted to the rotary drive shaft 14 or the toothed shaft 13 by driving by means of a rotary drive, not shown, of a stub 25 in the direction of the arrow 26, the rotary movement via a connecting piece 27 to the rotary drive shaft 14 and via a corresponding toothing 28 in another Bear on the toothed shaft 13, which cooperates with the expanding jaws 20, is transmitted.
  • the formation of the toothing 28 when the toothed shaft is connected to the rotary drive shaft and the fixing of the head 16 of the tool carrier 9 on the outer tube 23 of the Tool carrier is carried out such that the thread 29 for fixing the head 16 on the tube 23 has a larger diameter than the outer diameter of the toothed shaft 13 in the region of the toothing 28.
  • a securing device 30 is provided which engages in a perforated disc 31, for example provided with perforations at regular intervals and connected to the tube 23.
  • the arrangement and the movement of the expanding jaws 20 are shown in more detail in FIGS.
  • the expanding jaws 20 mesh via a toothing 31 'with an external toothing 32 of the toothed shaft 13, so that when a rotational movement is carried out the expanding jaws 20 from the position shown in FIG. 4 in the radial direction, as indicated by the arrow 33, into the Extend the position shown in Fig. 5.
  • the jaws are guided in corresponding radial recesses in the head 16 of the tool carrier and each have a stop 34 which, on the one hand, prevents the expanding jaws 20 from falling out and which, when a rotary movement is continued in FIG. 5 shown position or when the jaws are in contact with a perforated brick or an attached tool, the entire tool carrier is rotated.
  • the tool carrier 9 To remove a perforated stone or a worn lining from a converter opening, the tool carrier 9 is inserted into the opening to be cleared, cooling of the perforated stone or the hole to be removed being carried out by the application of fluid via the nozzles or outflow openings 17 in the foremost section of the head of the tool carrier the lining as preparation for the application and at the same time as protection for the tool carrier is achieved. Support the residual stresses generated by the cooling subsequently removing the lining to be removed.
  • the spreader jaws 20 are extended and expanded in the lining by rotating the toothed shaft 13, after which the jaws are knocked out by pulling them out supported by the counterblow hammer 10 .
  • the entire tool carrier, which is now spread out in the lining in its head region, together with the counterblow hammer 10 introducing impact energy, are pulled out of the opening to be cleared via the cylinder-piston unit 6 shown in FIG.
  • the tool carrier 9 is now used to set a new perforated brick package 36, with the procedure being such that the new perforated brick package 36, for example fixed on a steel tube 37, is held by means of the expanding jaws 20 and by a corresponding method of entire tool holder is positioned in the tap hole, the definition of the new perforated brick package is indicated schematically in FIG. 7.
  • the subdivision of the drive shaft for transmitting a torque or for the rotary drive of the entire tool carrier 9 into a plurality of partial shafts which are connected to one another in a rotationally fixed manner and by the separate fixing of the head 16 of the tool carrier with the expanding jaws 20 on the tube 23 can greatly simplify the assembly of the entire tool carrier and it is also possible to use different designs of the head 16 or the expanding jaws 20 to adapt to different hole openings.
  • the procedure is such that after inserting the half-shells 21 to transmit the impact energy and arranging the transition piece 27 on the shaft end 25 and the one end of the rotary drive shaft 14, the tube 23 is screwed to the end part 22.
  • the expanding jaws 20 When mounting the head 16 of the tool carrier, the expanding jaws 20 are first inserted into the corresponding recesses in the tool head 16, whereupon the toothed shaft 13 is inserted into the central recess of the head 16, whereby the expanding jaws 20 are secured against falling out through the respective end stops 34 . Thereafter, the head 16 with the expanding jaws 20 is inserted into the tube 23 and the toothing 28 results in a rotationally fixed connection of the toothed shaft 13 with the rotary drive shaft 14. The head 16 is fixed on the tube 23 by screwing by means of the thread 29.
  • the modular structure means that the head 16 of the tool holder 9 can be easily replaced by different diameters of openings to be cleared. Furthermore, the individual parts of the tool holder, which are connected by screw and plug connections, can be quickly replaced. Due to the simple construction of the tool carrier 9 in its middle part The tube 23 and the shaft 14 guided therein in the cavity 12 are easily adapted to different hole block lengths, the outer diameter of the tube 23 being matched to the smallest hole block diameter or diameter of a lining that is possible. In addition to using different designs of heads 16, different diameters of the perforated bricks or linings can also be taken into account by simply changing the jaws 20.
  • Tube 23 extends the thread 29 for fixing the head 16, which in this embodiment extends over the free end of the tube 23 facing away from the counterblow hammer 10, and it is screwed to the tube 23 via the thread 29, a sleeve 38, which is on the outside thereof Round thread 39 carries.
  • the head with the expanding jaws 20, not shown is located near the guide 24, through which the outer tube 23 passes, as is shown in particular in FIGS. 2 and 3.
  • the outer tube 23 is screwed via the sleeve 38 into a drill head 40, which has on its inside a round thread 41 which interacts with the round thread 39 of the sleeve 38 having.
  • the cutting edges of the drill head are indicated schematically at 42.
  • the drill head 40 is held in the rest position shown in FIG. 8 by a holding device 44 directly adjoining the support 43 which carries the guide 24 and is connected to the mount.
  • a slide 46 which can be actuated by a cylinder 45, holds the drilling head 40 in contact with the support 43 via a U-shaped end or claws 47.
  • the U-shaped, fork-shaped end region 47 of the slide 46 overlaps one essentially as a square trained area 48 of the drill head 40 and thus secures it against axial displacement and rotation.
  • the correct position of the drill bit 40 relative to the support 43 or the holding device 44 is further ensured by a tubular extension 49 rigidly connected to the holding device 44.
  • the entire tool carrier 9 with the drill bit 40 attached to it is again moved into a position in the axial direction in which the drill bit 40 assumes the position shown in FIG. 8 near the support 43 and the holding device 44.
  • the pipe 23 is unscrewed together with the sleeve 38 from the drill head 40 by a rotational movement in the opposite direction, as a result of which the tool carrier 9 with the head 16 is again perfect is separated from the drill head 40.
  • the mutually interacting stop surfaces 50 on the end of the head 16 facing the drill bit
  • 51 on Front end of the drill head 40.
  • correspondingly resilient spindle threads such as a trapezoidal thread may be provided.

Abstract

PCT No. PCT/AT90/00058 Sec. 371 Date Apr. 2, 1991 Sec. 102(e) Date Apr. 2, 1991 PCT Filed Jun. 8, 1990 PCT Pub. No. WO90/15161 PCT Pub. Date Dec. 13, 1990.A device for removing worn nozzle bricks or nozzle linings from the tap holes of metallurgical vessels including a spreading device, which can be introduced into the nozzle brick or tap hole, and a drive for extracting the nozzle brick or lining by means of the spreading device. The spreading device is arranged on a tool holder which can be displaced axially on a support, in particular a carriage. The tool holder can be connected to at least one drive. The tool holder advantageously includes an axial cavity in which a toothed shaft is rotatably mounted. The toothed shaft meshes with the toothing of at least two, and preferably three, spreading jaws which slide radially in the tool holder.

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Entfernen von verschlissenen Lochsteinen oder Auskleidungen in Abstich-Öffnungen metallurgischer Gefäße mit einer in den Lochstein bzw. das Abstichloch einführbaren Spreizeinrichtung und einem Antrieb zum Abziehen des Lochsteines bzw. der Auskleidung mittels der Spreizeinrichtung.The invention relates to a device for removing worn perforated bricks or linings in tap openings of metallurgical vessels with a spreading device which can be inserted into the perforated brick or the tap hole and a drive for pulling off the perforated brick or the lining by means of the spreading device.

Für den Ausbau von in die Abstichöffnung metallurgischer Gefäße eingesetzter Lochsteine ist es beispielsweise aus der AT-PS 386 422 bereits bekanntgeworden, ein Gerät an der Außenseite des metallurgischen Gefäßes abzustützen, mit welchem eine sich in Achsrichtung des Lochsteines erstreckende und in dieser Achsrichtung mittels eines Auszieh-Druckmittelzylinders längsverstellbare Auszieheinrichtung verbunden ist. Die Auszieheinrichtung dieser bekannten Vorrichtung weist wenigstens zwei Klemmklauen auf, welche mit einer Spreizeinrichtung mit dem Lochstein in und außer Eingriff bringbar sind und diese vorbekannte Einrichtung soll Lochsteine ohne Beschädigung des Dauerfutters des metallurgischen Gefäßes entfernen. Die bekannte Vorrichtung muß dabei zunächst händisch in die richtige Position gebracht werden und an der Außenseite des heißen metallurgischen Gefäßes festgelegt werden, wobei die Manipulation insofern aufwendig ist, als dann, wenn sich tatsächlich der Lochstein gelockert hat, die Vorrichtung samt dem heißen Lochstein händisch abgenommen werden muß. In vielen Fällen hat es sich gezeigt, daß Lochsteine durch einfache Druck- oder Zugbeaufschlagung in axialer Richtung nicht ohne weiteres ohne Beschädigung des Dauerfutters aus ihrer Lage herausgezogen werden können. Aus der AT-PS 383 831 ist eine Vorrichtung zum Herausziehen eines Gasspülsteines aus einem Lochstein bekanntgeworden, bei welcher dem Umstand Rechnung getragen wurde, daß ein einfacher axialer Zug nicht ohne weiteres zum sicheren Lockern des Lochsteines geeignet ist. Bei dieser bekannten Einrichtung, welche gleichfalls händisch mit dem Gasspülstein verbunden werden muß, ist ein Gleitkörper vorgesehen, der mit großer Wucht gegen einen Anschlag geschoben wird, wobei die entstehende Massenträgheit eine in Längsrichtung der Führungssteine verlaufende Aktionskraft, die den Gasspülstein aus dem Lochstein herauszieht, bewirkt. Die Ausziehkräfte werden somit schlagartig zur Wirkung gebracht, wobei auch diese Einrichtung händisch an den herauszuziehenden Gasspülstein angesetzt werden muß. Die Abstützung erfolgt wiederum an der Außenseite des heißen metallurgischen Gefäßes, um die Betriebsunterbrechung so kurz wie möglich zu halten.For the removal of perforated stones inserted into the tap hole of metallurgical vessels, it has already become known, for example from AT-PS 386 422, to support a device on the outside of the metallurgical vessel, with which a device extends in the axial direction of the perforated stone and in this axial direction by means of an extension -Pressure medium cylinder longitudinally adjustable pulling device is connected. The pull-out device of this known device has at least two clamping claws which can be brought into and out of engagement with the perforated brick with a spreading device and this known device is intended to remove perforated bricks without damaging the permanent lining of the metallurgical vessel. The known device must first be brought manually into the correct position and fixed on the outside of the hot metallurgical vessel, the manipulation being complex in that when the perforated stone has actually loosened, the device and the hot perforated stone are removed manually must become. In many cases it has been shown that perforated bricks cannot simply be pulled out of their position without damage to the permanent chuck by simply applying pressure or tension in the axial direction. From AT-PS 383 831 a device for pulling out a gas purging plug from a perforated brick has become known, in which the fact that a simple axial pull is not easily removed for safe loosening of the perforated stone is suitable. In this known device, which also has to be manually connected to the gas purging plug, a sliding body is provided which is pushed against a stop with great force, the resulting inertia being an action force running in the longitudinal direction of the guide blocks, which pulls the gas purging plug out of the perforated block, causes. The pull-out forces are thus brought to an abrupt effect, this device also having to be manually attached to the gas purging plug to be pulled out. The support is again on the outside of the hot metallurgical vessel in order to keep the interruption of operation as short as possible.

Mit der aus der AT-PS 383 831 bekanntgewordenen Vorrichtung werden lediglich die Gasspülsteine, nicht aber der Lochstein selbst abgezogen. Lochsteine finden in erster Linie Verwendung für Abstichöffnungen, beispielsweise von Konvertern, und der Verschleiß derartiger Lochsteine ergibt sich durch den Kontakt mit flüssigem Metall beim Ausgießen. Der Bereich der Abstichöffnungen ist daher zumeist mit einer zweilagigen Lochsteinauskleidung versehen, wobei die jeweils auszuwechselnden Lochsteinelemente über Bindemittel mit dem Dauerfutter, d.h. der im metallurgischen Gefäß über längere Zeit verbleibenden, zweiten Lochsteinauskleidung verbunden sind. Derartige mit Bindemitteln mit dem Dauerfutter verbundene Lochsteine, insbesondere ausgeschwemmte Lochsteine, müssen in der Regel mittels Preßlufthämmern herausgemeißelt werden oder mittels Bohreinrichtungen ausgebohrt werden. Hydraulische Zieheinrichtungen, wie sie beispielsweise der AT-PS 386 422 entnommen werden können, sind zumeist nur dann als erfolgreich anzusehen, wenn Klemmklauen den Lochstein innen hintergreifen, um hinreichende Zugkräfte sicherzustellen, wobei auch hier naturgemäß die Gefahr einer Beschädigung des Dauerfutters nicht ohne weiteres ausgeschlossen werden kann.With the device known from AT-PS 383 831, only the gas purging stones are removed, but not the perforated stone itself. Perforated stones are primarily used for tap openings, for example of converters, and the wear of such perforated stones results from contact with liquid metal during pouring. The area of the tap openings is therefore usually provided with a two-layer perforated brick lining, the perforated brick elements to be replaced in each case being connected to the permanent lining by means of binders, ie the second perforated brick lining remaining in the metallurgical vessel over a longer period of time. Such perforated stones connected with binders to the permanent feed, in particular washed-out perforated stones, generally have to be chiseled out using pneumatic hammers or drilled out using drilling devices. Hydraulic pulling devices, such as those found in AT-PS 386 422, can usually only be regarded as successful if clamping claws reach behind the perforated brick on the inside to ensure sufficient tensile forces, although here too the risk of damage to the permanent feed is not automatically excluded can be.

Die Erfindung zielt nun darauf ab, eine Einrichtung der eingangs genannten Art zu schaffen, welche ohne zusätzliche Manipulationen, wie beispielsweise Aufstellen einer Arbeitsbühne, alle Arbeitsschritte auszuführen erlaubt, welche zum vollständigen Austausch von Lochsteinen inklusive des Einbaues eines neuen Lochsteines erforderlich sind. Zur Lösung dieser Aufgabe besteht die erfindungsgemäße Einrichtung im wesentlichen darin, daß die Spreizeinrichtung an einem in Achsrichtung auf einem Support, insbesondere einer Lafette, verfahrbaren Werkzeugträger angeordnet ist, und daß der Werkzeugträger mit wenigstens einem Antrieb verbindbar ist. Dadurch, daß die Spreizeinrichtung an einem in Achsrichtung auf einem Support, insbesondere einer Lafette, verfahrbaren Werkzeugträger angeordnet ist, wird eine einfache Positionierung und ein hinreichender Arbeitsweg zur Verfügung gestellt, mit welchem unterschiedliche Arbeitsschritte beim Ein- und Ausbau von Lochsteinen durch einfachen Austausch von Werkzeugen am Werkzeugträger durchgeführt werden können. Die Spreizeinrichtung kann hiebei sowohl während des Abziehen des Lochsteines als auch zum neuerlichen Einsetzen eines neuen Lochsteines herangezogen werden, wobei darüberhinaus an einer derartigen Spreizeinrichtung Werkzeuge, wie sie für die vollständige Räumung des Loches günstig erscheinen, festgelegt werden können. Durch die genannte Verfahrbarkeit wird es somit möglich, über das bloße Entfernen von verschlissenen Lochsteinen oder Auskleidungen hinaus auch ein neuerliches Positionieren von neuen Lochsteinen in der korrekten Lage vorzunehmen, wobei die Verfahrbarkeit des Werkzeugträgers auf einem Support, insbesondere einer Lafette, die Möglichkeit bietet, die gesamte Einrichtung auf einem fahrbaren Unterwagen anzuordnen, womit die Manipulation beim Aus- und Einbau von Lochsteinen wesentlich vereinfacht wird. Insbesondere entfällt die Festlegung und Abstützung an der heißen Gefäßwand, da der Support bzw. die Lafette mit Eigenantrieb in die jeweilige Position gefahren werden können und die Reaktionskräfte von einem Unterwagen aufgenommen werden können. Die Verwendung eines Werkzeugträgers erlaubt es, über einen derartigen Werkzeugträger auch andere Verfahrensweisen, wie insbesondere die Kühlung des Lochsteines als Vorbereitung für die Ausbringung vorzunehmen. Eine derartige Kühlung des Lochsteines als Vorbereitung für die Ausbringung führt zu Eigenspannungen, welche das Herausziehen des Schluß- bzw. Lochsteines unterstützen, und führt zu einer Schonung des Ausziehwerkzeuges. Der Werkzeugträger erlaubt es aber auch, je nach Art des verwendeten Antriebes nach dem Verspreizen ein schlagunterstütztes Herausziehen bzw. Heraushämmern von Lochsteinen zu erzielen, wobei an einem derartigen Werkzeugträger auch Bohrwerkzeuge festgelegt werden können, mit welchen die Öffnung für das Einsetzen des neuen Lochsteines kalibriert werden kann. Schließlich kann ein vormontiertes Lochsteinpaket über den Werkzeugträger mittels der Lafette eingefahren werden.The invention now aims to provide a device of the type mentioned, which allows all work steps to be carried out without additional manipulations, such as setting up a work platform, which are necessary for the complete replacement of perforated stones including the installation of a new perforated stone. To achieve this object, the device according to the invention essentially consists in the spreading device being arranged on a tool carrier which can be moved in the axial direction on a support, in particular a carriage, and in that the tool carrier can be connected to at least one drive. Due to the fact that the spreading device is arranged on a tool carrier that can be moved in the axial direction on a support, in particular a carriage, simple positioning and a sufficient working path are made available, with which different working steps in the installation and removal of perforated stones by simple exchange of tools can be carried out on the tool carrier. The spreading device can be used both during the removal of the perforated brick and for the new insertion of a new perforated brick, wherein tools such as those which appear favorable for the complete clearing of the hole can also be fixed on such a spreading device. The above-mentioned movability makes it possible, in addition to simply removing worn perforated bricks or linings, to also reposition new perforated bricks in the correct position, the movability of the tool holder on a support, in particular a mount, offering the possibility that Arrange the entire facility on a mobile undercarriage, which significantly simplifies the manipulation when removing and installing perforated bricks. In particular, the fixing and support on the hot vessel wall is omitted, since the support or the carriage can be moved into the respective position with its own drive and the reaction forces can be absorbed by an undercarriage. The The use of a tool carrier allows other methods, such as in particular the cooling of the perforated brick, as preparation for the application, to be carried out via such a tool carrier. Such cooling of the perforated stone as preparation for the application leads to residual stresses which support the pulling out of the closing stone or perforated stone and leads to protection of the extracting tool. The tool carrier also allows, depending on the type of drive used, to achieve an impact-assisted pulling out or hammering out of perforated stones after the expansion, whereby drilling tools with which the opening for inserting the new perforated stone can be calibrated can also be fixed on such a tool carrier can. Finally, a preassembled perforated brick package can be inserted over the tool carrier using the carriage.

Mit Vorteil ist zur Erfüllung all dieser Funktionen die erfindungsgemäße Einrichtung so ausgebildet, daß der Werkzeugträger einen axialen Hohlraum aufweist, in welchem eine Zahnwelle rotierbar gelagert ist, und daß die Zahnwelle mit einer Verzahnung von wenigstens zwei, vorzugsweise drei im Werkzeugträger in radialer Richtung verschiebbar geführten Spreizbacken kämmt. Über die rotierbar gelagerte Zahnwelle kann erforderlichenfalls für das Ausbohren bzw. Kalibrieren eine drehende Werkzeugbewegung erzielt werden, wobei die Spreizbacken unmittelbar zur Festlegung des Kalibrierwerkzeuges herangezogen werden können. Wenn umgekehrt der Werkzeugträger gegen rotierende Bewegung gesichert ist und lediglich die Zahnwelle mit einem definierten Drehmoment beaufschlagt wird, erfolgt ein Anpressen der Spreizbacken an die Innenwand des Lochsteines bei ausgefahrenen Spreizbacken und es kann der Werkzeugträger hämmernd beaufschlagt werden, um ein Herauslösen des Lochsteines zu begünstigen.To fulfill all these functions, the device according to the invention is advantageously designed such that the tool carrier has an axial cavity in which a toothed shaft is rotatably mounted, and that the toothed shaft is guided in the tool carrier so as to be displaceable in the radial direction with a toothing of at least two, preferably three Spreading jaws combs. If necessary, a rotating tool movement can be achieved via the rotatably mounted toothed shaft for drilling out or calibrating, the expanding jaws being able to be used directly to fix the calibration tool. Conversely, if the tool holder is secured against rotating movement and only a defined torque is applied to the toothed shaft, the expanding jaws are pressed against the inner wall of the perforated brick when the expanding jaws are extended and the tool holder can be hammered to facilitate removal of the perforated brick.

Zur Übertragung einer Drehbewegung auf auf die Spreizbacken aufgesteckte Werkzeuge zum Kalibrieren oder Ausbohren des Loches ist mit Vorteil die Ausbildung so getroffen, daß der Werkzeugträger im Support bzw. an der Lafette rotierbar gelagert ist und gegenüber dem Support bzw. der Lafette drehfest verriegelbar ist, wobei die Verriegelbarkeit dazu dient, die erforderlichen Spreizkräfte aufzubringen, um ein Ausziehen des Steines zu ermöglichen.To transmit a rotary movement to tools attached to the expanding jaws for calibrating or drilling the hole, the design is advantageously made such that the tool carrier is rotatably mounted in the support or on the mount and can be locked in a rotationally fixed manner relative to the support or mount, whereby the lockability serves to apply the necessary spreading forces to enable the stone to be pulled out.

Mit Vorteil sind mit dem Werkzeugträger und der Zahnwelle verschiedene Antriebe verbunden, wobei in einfacher Weise mit der Zahnwelle ein Drehantrieb und mit dem Werkzeugträger ein Schlagantrieb, insbesondere ein Gegenschlaghammer verbindbar sein kann. Der Schlagantrieb wirkt hiebei auf den hohlen Werkzeugträger und damit auf einen entsprechend steifen rohrförmigen Bauteil, wohingegen die Zahnwelle zur Übertragung von Drehmomenten sowohl für das Anpressen der Backen als auch für das rotierende Aufbohren der Öffnung herangezogen wird.Various drives are advantageously connected to the tool carrier and the toothed shaft, it being possible to connect a rotary drive to the toothed shaft in a simple manner and an impact drive, in particular a counterblow hammer, to the tool carrier. The percussion drive acts on the hollow tool carrier and thus on a correspondingly rigid tubular component, whereas the toothed shaft is used to transmit torques both for pressing the jaws and for rotatingly drilling the opening.

Zur Kühlung der Lochwand und zur Erzielung von Schrumpfspannungen zur Lockerung des verschlissenen Lochsteines ist mit Vorteil die Ausbildung so getroffen, daß die Zahnwelle wenigstens einen axialen Kanal aufweist, welcher mit Düsen bzw. Ausströmöffnungen nahe dem freien Ende des Werkzeugträgers und einem Anschluß für Fluid verbunden ist. Ein entsprechender dichtender Abschluß kann in einfacher Weise dadurch erzielt werden, daß die Zahnwelle selbst diesen axialen Kanal für die Zuführung von Fluid aufweist, wobei die Einspeisung von Fluid in den axialen Kanal in besonders einfacher Weise dadurch erzielt werden kann, daß der Fluidanschluß am Support bzw. der Lafette einen Ringkanal aufweist, in welchen radiale Bohrungen zum axialen Kanal der Zahnwelle münden.To cool the perforated wall and to achieve shrinkage stresses to loosen the worn perforated brick, the design is advantageously made such that the toothed shaft has at least one axial channel which is connected to nozzles or outflow openings near the free end of the tool carrier and a connection for fluid . A corresponding sealing closure can be achieved in a simple manner in that the toothed shaft itself has this axial channel for the supply of fluid, the feeding of fluid into the axial channel can be achieved in a particularly simple manner in that the fluid connection at the support or the mount has an annular channel, in which radial bores open to the axial channel of the toothed shaft.

Zur Vereinfachung des Zusammenbaues und zur Erweiterung des Anwendungsbereiches der erfindungsgemäßen Einrichtung durch Anschluß unterschiedlichster Werkzeuge ist mit Vorteil die Ausbildung so getroffen, daß die Zahnwelle mit einer Drehantriebswelle über eine Verzahnung drehfest und in Achsrichtung verschiebbar verbunden ist. Insbesondere wenn, wie es einer bevorzugten Ausbildung entspricht, die Ausbildung so getroffen ist, daß der die Spreizbacken tragende Kopfteil des Werkzeugträgers über ein Gewinde mit dem mit dem Schlagantrieb verbindbaren Teil des Werkzeugträgers lösbar verbunden ist, läßt sich der Kopf des Werkzeugträgers in einfacher Weise vom Werkzeugträger ablösen, wobei auf Grund der Verbindung der Zahnwelle mit einer Drehantriebswelle gemeinsam mit dem Kopf auch die Zahnwelle abgenommen werden kann, so daß mit der Drehantriebswelle andere Werkzeuge verbunden werden können. Für einen derartigen einfachen Ausbau des Kopfteiles ohne Ausbau des oder der Antriebe ist mit Vorteil die Ausbildung so getroffen, daß das Gewinde zur Verbindung des Werkzeugträgers mit dem Kopfteil des Werkzeugträgers einen Kerndurchmesser aufweist, welcher größer ist als der Außendurchmesser der mit der Drehantriebswelle verbundenen Zahnwelle, wodurch alle drehschlüssig miteinander verbundenen Bauteile des Werkzeugträgers und der zentralen Antriebswelle nach vorne ausgebaut werden können.To simplify the assembly and to expand the field of application of the device according to the invention by connecting a wide variety of tools, the design is advantageously made such that the toothed shaft is connected to a rotary drive shaft in a rotationally fixed manner and displaceably in the axial direction. In particular, if, as is the case with a preferred embodiment, the design is such that the head part of the tool carrier carrying the expanding jaws is detachably connected via a thread to the part of the tool carrier which can be connected to the impact drive, the head of the tool carrier can be removed in a simple manner from Detach the tool holder, and because of the connection of the toothed shaft with a rotary drive shaft, the toothed shaft can also be removed together with the head, so that other tools can be connected to the rotary drive shaft. For such a simple removal of the head part without removal of the drive or drives, the design is advantageously made such that the thread for connecting the tool holder to the head part of the tool holder has a core diameter which is larger than the outer diameter of the toothed shaft connected to the rotary drive shaft, whereby all components of the tool carrier and the central drive shaft which are connected to one another in a rotationally locked manner can be removed to the front.

In besonders einfacher Weise läßt sich mit der erfindungsgemäßen Einrichtung auch ein Bohrkopf unmittelbar mit dem Werkzeugträger verbinden, wobei mit Vorteil die Ausbildung so getroffen ist, daß auf das Gewinde eine Hülse aufgeschraubt ist, welche an ihrer Außenseite ein Rundgewinde oder ein Trapezgewinde aufweist, auf welches ein Bohrkopf gegen einen Anschlag des Werkzeugträgers aufschraubbar ist. Eine derartige Hülse kann in einfacher Weise auf den Werkzeugträger aufgeschraubt werden, wobei das Außengewinde einer derartigen Hülse das einfache Aufschrauben eines Bohrkopfes unter Verwendung des Drehantriebes des Werkzeugträgers erlaubt. Das Aufschrauben des Bohrkopfes erfolgt hiebei auf das Rund- bzw. Trapezgewinde bis zu einem Anschlag des Werkzeugträger, wobei für das nachfolgende Bohren naturgemäß die gleiche Drehrichtung beibehalten werden muß, um ein Lösen des Bohrkopfes vom Gewinde zu verhindern. Andernfalls müßte in der aufgeschraubten Position des Bohrkopfes eine gesonderte Drehsicherung relativ zum Werkzeugträger vorgesehen sein. Um das Aufschrauben auf das Außengewinde der Hülse zu ermöglichen, muß der Bohrkopf während des Aufschraubens drehsicher gehalten werden, wobei die Ausbildung mit Vorteil so getroffen ist, daß der auf die Hülse aufschraubbare Bohrkopf einen Anschlag für eine gesonderte Drehsicherung aufweist, welcher mit einem entriegelbaren Anschlag am Support zusammenwirkt. Für den nachfolgenden Bohrbetrieb muß naturgemäß die gesonderte Drehsicherung wieder freigegeben werden.In a particularly simple manner, a drilling head can also be connected directly to the tool carrier with the device according to the invention, the design advantageously being such that a sleeve is screwed onto the thread, which has a round thread or a trapezoidal thread on its outside, on which a drill head can be screwed against a stop of the tool carrier. Such a sleeve can be screwed onto the tool holder in a simple manner, the external thread of such a sleeve allowing the simple screwing on of a drill head using the rotary drive of the tool holder. The The drill head is screwed onto the round or trapezoidal thread up to a stop of the tool holder, whereby the same direction of rotation must naturally be maintained for the subsequent drilling in order to prevent the drill head from loosening from the thread. Otherwise, a separate rotation lock relative to the tool carrier would have to be provided in the screwed-on position of the drill head. In order to enable screwing onto the external thread of the sleeve, the drill head must be held in a rotationally secure manner during screwing on, the design being advantageously made such that the drill head which can be screwed onto the sleeve has a stop for a separate anti-rotation lock, which has an unlockable stop cooperates on support. For the subsequent drilling operation, the separate anti-rotation lock must of course be released again.

Die Erfindung wird nachfolgend an Hand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles näher erläutert. In dieser zeigen Fig.1 eine Seitenansicht einer auf einem verfahrbaren Unterwagen festgelegten erfindungsgemäßen Einrichtung; Fig.2 in vergrößertem Maßstab die erfindungsgemäße Einrichtung gemäß Fig.l in einem Schnitt durch den Werkzeugträger; Fig.3 in einer zu Fig.2 ähnlichen Ansicht in weiter vergrößertem Maßstab den Kopf sowie das dem Kopf abgewandte Ende des Werkzeugträgers; die Fig.4 und 5 Schnitte nach der Linie IV-IV der Fig.3 durch einen Spreizbacken, wobei Fig.4 die eingezogene Position und Fig.5 die ausgefahrene Position des Spreizbackens darstellt; Fig.6 eine schematische Darstellung der Festlegung eines Kalibrierwerkzeuges an der erfindungsgemäßen Einrichtung; Fig.7 in einer Darstellung analog zu Fig.6 die Festlegung eines neu zu setzenden Lochsteinpaketes an der erfindungsgemäßen Einrichtung; Fig. 8 in vergrößerter Darstellung einen teilweisen Schnitt durch eine abgewandelte Ausführungsform zur Festlegung eines Bohrwerkzeuges an der erfindungsgemäßen Einrichtung; und Fig. 9 einen teilweisen Schnitt nach der Linie IX-IX der Fig. 8.The invention is explained in more detail below on the basis of an exemplary embodiment schematically illustrated in the drawing. 1 shows a side view of a device according to the invention fixed on a movable undercarriage; 2 shows, on an enlarged scale, the device according to the invention according to FIG. 1 in a section through the tool carrier; 3 in a view similar to FIG. 2 on a further enlarged scale, the head and the end of the tool carrier facing away from the head; Figures 4 and 5 sections along the line IV-IV of Figure 3 by an expanding jaw, Figure 4 represents the retracted position and Figure 5 shows the extended position of the expanding jaw; 6 shows a schematic illustration of the definition of a calibration tool on the device according to the invention; 7 shows, in a representation analogous to FIG. 6, the definition of a perforated brick packet to be newly set on the device according to the invention; Fig. 8 is an enlarged view of a partial section through a modified embodiment for fixing a drilling tool on the invention Facility; and FIG. 9 shows a partial section along the line IX-IX of FIG. 8.

In Fig.1 ist mit 1 ein auf einem Raupenfahrwerk 2 verfahrbarer Unterwagen bezeichnet, wobei an einem über Zylinder-Kolbenaggregate 3 und 4 heb- und senkbaren und ausrichtbaren Arm 5 ein Support bzw. eine Lafette 8 festgelegt ist. An diesem Support bzw. der Lafette ist ein durch ein Zylinder-Kolbenaggregat 6 in Richtung des Doppelpfeiles 7 verfahrbarer Werkzeugträger 9, welcher in den nachfolgenden Figuren noch deutlicher dargestellt ist, sowie ein als Gegenschlaghammer 10 ausgebildetes Schlagwerkzeug festgelegt, welches auf den Werkzeugträger 9 eine durch den Doppelpfeil 11 angedeutete Schlagbewegung ausübt.In FIG. 1, 1 denotes an undercarriage which can be moved on a crawler chassis 2, a support or a mount 8 being fixed on an arm 5 which can be raised and lowered via cylinder-piston units 3 and 4. On this support or the carriage, a tool carrier 9, which can be moved in the direction of the double arrow 7 by a cylinder-piston unit 6 and which is shown even more clearly in the following figures, and a striking tool designed as a counterblow hammer 10 are attached to the tool carrier 9 the double arrow 11 indicated striking movement.

Mit dem verfahrbaren Unterwagen kann der Werkzeugträger für den Ausbau, die Räumung und den Einbau von Lochsteinen bzw. Abstichöffnungen metallurgischer Gefäße entsprechend den Anforderungen relativ zu einer Abstichöffnung eines nicht näher dargestellten Konverters positioniert werden und es kann die Entfernung eines verschlissenen Lochsteines bzw. einer verschlissenen Auskleidung sowie eine Kalibrierung und ein nachfolgendes Setzen einer neuen Auskleidung ohne händische Manipulationen eines direkt am metallurgischen Gefäß festgelegten Ausziehgerätes erfolgen. Es kann somit mit einer einzigen Vorrichtung, wie sie in Fig.1 dargestellt ist, und mit einem Minimum an Bedienungsaufwand eine Vielzahl von Abstichöffnungen auch an unterschiedlichen Konvertern bedient werden, und es kann auf die Anordnung von entsprechenden Halteeinrichtungen und Ausziehvorrichtungen im Bereich jeden Abstichloches verzichtet werden.With the movable undercarriage, the tool carrier for the removal, clearing and installation of perforated stones or tap openings of metallurgical vessels can be positioned according to the requirements relative to a tap hole of a converter, not shown, and the removal of a worn perforated brick or a worn lining as well as calibration and subsequent setting of a new lining without manual manipulation of an extractor attached directly to the metallurgical vessel. It can thus be operated with a single device, as shown in FIG. 1, and with a minimum of operating effort, a large number of tap openings even on different converters, and the arrangement of corresponding holding devices and pull-out devices in the area of each tap hole can be dispensed with will.

Bei dem in Fig.2 dargestellten Schnitt durch den Werkzeugträger ist deutlich ersichtlich, daß in einem in Achsrichtung des Werkzeugträgers 9 verlaufenden Hohlraum 12 eine Zahnwelle 13 sowie eine mit der Zahnwelle 13 drehfest verbundene Drehantriebswelle 14 gelagert sind. Anstelle der derart zweigeteilten Antriebswelle, welche in Fig.3 noch deutlicher dargestellt ist, kann naturgemäß eine durchgehende Welle Verwendung finden, wobei die geteilte Ausbildung Vorteile für den Zusammenbau des gesamten Werkzeugträgers mit sich bringt, wie dies weiter unten noch näher beschrieben werden wird. Sowohl die Zahnwelle 13 als auch die Drehantriebswelle 14 weisen einen in axialer Richtung verlaufenden Kanal 15 auf, welcher im Bereich des Kopfes 16 des Werkzeugträgers in Düsen bzw. Ausströmöffnungen 17 mündet und welcher am dem Werkzeugträgerkopf 16 gegenüberliegenden Ende einen von radialen Kanälen 18 gebildeten Anschluß an einen Ringraum 19 zur Zuführung eines Fluids aufweist. Im Bereich des Kopfes 16 des Werkzeugträgers sind weiters Spreizbacken 20 angeordnet, welche in radialer Richtung relativ zur Zahnwelle und somit zum gesamten Werkzeugträger verschiebbar sind.In the section through the tool carrier shown in FIG. 2, it is clearly evident that in a cavity 12 extending in the axial direction of the tool carrier 9, a toothed shaft 13 and one connected to the toothed shaft 13 in a rotationally fixed manner Rotary drive shaft 14 are mounted. Instead of the drive shaft divided in two, which is shown even more clearly in FIG. 3, a continuous shaft can naturally be used, the split design having advantages for the assembly of the entire tool carrier, as will be described in more detail below. Both the toothed shaft 13 and the rotary drive shaft 14 have an axially extending channel 15 which opens into nozzles or outflow openings 17 in the region of the head 16 of the tool holder and which has a connection formed by radial channels 18 at the end opposite the tool holder head 16 has an annular space 19 for supplying a fluid. In the area of the head 16 of the tool carrier there are further spreading jaws 20 which can be displaced in the radial direction relative to the toothed shaft and thus to the entire tool carrier.

Der Gegenschlaghammer 10 übt seine Schlagenergie auf zwei Halbschalen 21 im Bereich eines Abschlußteiles 22 aus, wobei die derart im Sinne des Doppelpfeiles 11 durch den Gegenschlaghammer 10 ausgeübte Schlagbeanspruchung über das mit dem Außenrohr 23 des Werkzeugträgers verschraubte Übergangsstück auf dieses Außenrohr übertragen wird. Der Werkzeugträger 9 ist dabei mit seinem Außenrohr in einer Führung 24 zentriert.The counterblow hammer 10 exerts its impact energy on two half shells 21 in the region of a closing part 22, the impact stress thus exerted by the counterblow hammer 10 in the sense of the double arrow 11 being transmitted to this outer tube via the transition piece screwed to the outer tube 23 of the tool carrier. The tool carrier 9 is centered with its outer tube in a guide 24.

Die Übertragung eines Drehmomentes auf die Drehantriebswelle 14 bzw. die Zahnwelle 13 erfolgt durch Antrieb mittels eines nicht näher dargestellten Drehantriebes eines Stummels 25 im Sinne des Pfeiles 26, wobei die Drehbewegung über ein Verbindungsstück 27 auf die Drehantriebswelle 14 und über eine entsprechende Verzahnung 28 in weiterer Folge auf die Zahnwelle 13, welche mit den Spreizbacken 20 zusammenwirkt, übertragen wird. Die Ausbildung der Verzahnung 28 bei der Verbindung der Zahnwelle mit der Drehantriebswelle sowie die Festlegung des Kopfes 16 des Werkzeugträgers 9 am Außenrohr 23 des Werkzeugträgers erfolgt dabei derart, daß das Gewinde 29 zur Festlegung des Kopfes 16 am Rohr 23 einen größeren Durchmesser aufweist als der Außendurchmesser der Zahnwelle 13 im Bereich der Verzahnung 28. Zur Verhinderung einer Drehbewegung des Außenrohres 23, wie es bei gewissen Arbeitsschritten notwendig ist, ist eine Sicherungseinrichtung 30 vorgesehen, welche in eine beispielsweise mit Durchbrechungen in regelmäßigen Abständen versehene, mit dem Rohr 23 verbundene Lochscheibe 31 eingreift.The torque is transmitted to the rotary drive shaft 14 or the toothed shaft 13 by driving by means of a rotary drive, not shown, of a stub 25 in the direction of the arrow 26, the rotary movement via a connecting piece 27 to the rotary drive shaft 14 and via a corresponding toothing 28 in another Follow on the toothed shaft 13, which cooperates with the expanding jaws 20, is transmitted. The formation of the toothing 28 when the toothed shaft is connected to the rotary drive shaft and the fixing of the head 16 of the tool carrier 9 on the outer tube 23 of the Tool carrier is carried out such that the thread 29 for fixing the head 16 on the tube 23 has a larger diameter than the outer diameter of the toothed shaft 13 in the region of the toothing 28. To prevent rotation of the outer tube 23, as is necessary in certain work steps a securing device 30 is provided which engages in a perforated disc 31, for example provided with perforations at regular intervals and connected to the tube 23.

In den Fig.4 und 5 ist die Anordnung und die Bewegung der Spreizbacken 20 näher dargestellt. Die Spreizbacken 20 kämmen dabei über eine Verzahnung 31' mit einer Außenverzahnung 32 der Zahnwelle 13, so daß bei Ausübung einer Drehbewegung die Spreizbacken 20 aus der in Fig.4 dargestellten Stellung in radialer Richtung, wie sie durch den Pfeil 33 angedeutet ist, in die in Fig.5 dargestellte Stellung ausfahren. Die Backen sind dabei in entsprechenden, in radialer Richtung verlaufenden Ausnehmungen des Kopfes 16 des Werkzeugträgers geführt und weisen jeweils einen Anschlag 34 auf, welche einerseits ein Herausfallen der Spreizbacken 20 verhindern und welche bewirken, daß bei fortgesetzter Ausübung einer Drehbewegung in der in Fig.5 dargestellten Stellung bzw. bei Anliegen der Backen an einem Lochstein oder einem aufgesetzten Werkzeug der gesamte Werkzeugträger in eine Drehbewegung versetzt wird.The arrangement and the movement of the expanding jaws 20 are shown in more detail in FIGS. The expanding jaws 20 mesh via a toothing 31 'with an external toothing 32 of the toothed shaft 13, so that when a rotational movement is carried out the expanding jaws 20 from the position shown in FIG. 4 in the radial direction, as indicated by the arrow 33, into the Extend the position shown in Fig. 5. The jaws are guided in corresponding radial recesses in the head 16 of the tool carrier and each have a stop 34 which, on the one hand, prevents the expanding jaws 20 from falling out and which, when a rotary movement is continued in FIG. 5 shown position or when the jaws are in contact with a perforated brick or an attached tool, the entire tool carrier is rotated.

Zur Entfernung eines Lochsteines bzw. einer verschlissenen Auskleidung aus einer Konverteröffnung wird der Werkzeugträger 9 in die zu räumende Öffnung eingeführt, wobei durch das Ausbringen von Fluid über die Düsen bzw. Ausströmöffnungen 17 im vordersten Abschnitt des Kopfes des Werkzeugträgers eine Kühlung des zu entfernenden Lochsteines bzw. der Auskleidung als Vorbereitung für die Ausbringung und gleichzeitig als Schonung für den Werkzeugträger erzielt wird. Die durch die Kühlung erzeugten Eigenspannungen unterstützen dabei in weiterer Folge das Herauslösen der zu entfernenden Auskleidung. Nach einem entsprechenden Positionieren des Werkzeugträgers 9 durch Verschiebung desselben in Richtung des Pfeiles 7 relativ zur Lafette 8 erfolgt durch ein Verdrehen der Zahnwelle 13 ein Ausfahren und Verspreizen der Spreizbacken 20 in der Auskleidung, worauf ein Herausschlagen derselben über ein durch den Gegenschlaghammer 10 unterstütztes Herausziehen erfolgt. Dabei wird über das in Fig.1 dargestellte Zylinder-Kolbenaggregat 6 der gesamte Werkzeugträger, welcher in seinem Kopfbereich nunmehr in der Auskleidung verspreizt ist, mitsamt dem eine Schlagenergie einbringenden Gegenschlaghammer 10 unter Entfernung aus der zu räumenden Öffnung herausgezogen.To remove a perforated stone or a worn lining from a converter opening, the tool carrier 9 is inserted into the opening to be cleared, cooling of the perforated stone or the hole to be removed being carried out by the application of fluid via the nozzles or outflow openings 17 in the foremost section of the head of the tool carrier the lining as preparation for the application and at the same time as protection for the tool carrier is achieved. Support the residual stresses generated by the cooling subsequently removing the lining to be removed. After a corresponding positioning of the tool carrier 9 by moving it in the direction of the arrow 7 relative to the mount 8, the spreader jaws 20 are extended and expanded in the lining by rotating the toothed shaft 13, after which the jaws are knocked out by pulling them out supported by the counterblow hammer 10 . In this case, the entire tool carrier, which is now spread out in the lining in its head region, together with the counterblow hammer 10 introducing impact energy, are pulled out of the opening to be cleared via the cylinder-piston unit 6 shown in FIG.

Nach einer derartigen Entfernung eines verschlissenen Lochsteines bzw. einer verschlissenen Auskleidung aus einer zu räumenden Abstichöffnung verbleiben im allgemeinen Reste der Auskleidung in derselben und es wird vor dem Einsetzen eines neues Lochsteines bzw. einer neuen Auskleidung die Öffnung aufgebohrt bzw. kalibriert. Dies kann mit dem Werkzeugträger 9 in einfacher Weise dadurch erfolgen, daß von den Spreizbacken 20 im Bereich des Kopfes des Werkzeugträgers 9 eine Bohrkrone bzw. ein Kalibrierwerkzeug 35 gehalten wird, wie dies in Fig.6 schematisch angedeutet ist. Durch Ausübung der Drehbewegung auf den Werkzeugträger 9 durch Antreiben der Zahnwelle 13 und Mitnahme des Außenrohres 23 durch die Spreizbacken erfolgt derart über die Mitnahme des Bohrwerkzeuges 35 ein Ausbohren der Abstichöffnung.After such removal of a worn perforated brick or a worn lining from a tapping opening to be cleared, residues of the lining generally remain in the same and the opening is drilled out or calibrated before a new perforated brick or new lining is inserted. This can be done with the tool carrier 9 in a simple manner in that a drill bit or a calibration tool 35 is held by the expanding jaws 20 in the region of the head of the tool carrier 9, as is indicated schematically in FIG. By exerting the rotary movement on the tool carrier 9 by driving the toothed shaft 13 and driving the outer tube 23 through the expanding jaws, the tapping opening is drilled out by driving the drilling tool 35.

Nach einem derartig erfolgten Räumen bzw. Kalibrieren der Öffnung wird der Werkzeugträger 9 nunmehr zum Setzen eines neuen Lochsteinpaketes 36 verwendet, wobei derart vorgegangen wird, daß das beispielsweise auf einem Stahlrohr 37 festgelegte neue Lochsteinpaket 36 mittels der Spreizbacken 20 gehalten wird und durch entsprechendes Verfahren des gesamten Werkzeugträgers in der Abstichöffnung positioniert wird, wobei die Festlegung des neuen Lochsteinpaketes schematisch in Fig.7 angedeutet ist.After clearing or calibrating the opening in this way, the tool carrier 9 is now used to set a new perforated brick package 36, with the procedure being such that the new perforated brick package 36, for example fixed on a steel tube 37, is held by means of the expanding jaws 20 and by a corresponding method of entire tool holder is positioned in the tap hole, the definition of the new perforated brick package is indicated schematically in FIG. 7.

Durch die Unterteilung der Antriebswelle zur Übertragung eines Drehmomentes bzw. für den Drehantrieb des gesamten Werkzeugträgers 9 in mehrere miteinander drehfest verbundene Teilwellen sowie durch die getrennte Festlegung des Kopfes 16 des Werkzeugträgers mit den Spreizbacken 20 am Rohr 23 läßt sich der Zusammenbau des gesamten Werkzeugträgers stark vereinfachen und es lassen sich weiters unterschiedliche Ausbildungen des Kopfes 16 oder der Spreizbacken 20 für eine Anpassung an unterschiedliche Lochöffnungen einsetzen. Beim Zusammenbau des Werkzeugträgers 9 wird dabei so vorgegangen, daß nach dem Einlegen der Halbschalen 21 zur Übertragung der Schlagenergie und der Anordnung des Übergangstückes 27 auf dem Wellenstummel 25 und dem einen Ende der Drehantriebswelle 14 das Rohr 23 mit dem Abschlußteil 22 verschraubt wird. Bei der Montage des Kopfes 16 des Werkzeugträgers werden zuerst die Spreizbacken 20 in die entsprechenden Ausnehmungen im Werkzeugkopf 16 eingesteckt, worauf die Zahnwelle 13 in die zentrale Ausnehmung des Kopfes 16 eingeführt wird, wodurch die Spreizbacken 20 gegen ein Herausfallen durch die jeweiligen Endanschläge 34 gesichert sind. Danach wird der Kopf 16 mit den Spreizbacken 20 in das Rohr 23 eingeschoben und es erfolgt durch die Verzahnung 28 eine drehfeste Verbindung der Zahnwelle 13 mit der Drehantriebswelle 14. Die Festlegung des Kopfes 16 am Rohr 23 erfolgt dabei durch Verschraubung mittels des Gewindes 29.The subdivision of the drive shaft for transmitting a torque or for the rotary drive of the entire tool carrier 9 into a plurality of partial shafts which are connected to one another in a rotationally fixed manner and by the separate fixing of the head 16 of the tool carrier with the expanding jaws 20 on the tube 23 can greatly simplify the assembly of the entire tool carrier and it is also possible to use different designs of the head 16 or the expanding jaws 20 to adapt to different hole openings. When assembling the tool holder 9, the procedure is such that after inserting the half-shells 21 to transmit the impact energy and arranging the transition piece 27 on the shaft end 25 and the one end of the rotary drive shaft 14, the tube 23 is screwed to the end part 22. When mounting the head 16 of the tool carrier, the expanding jaws 20 are first inserted into the corresponding recesses in the tool head 16, whereupon the toothed shaft 13 is inserted into the central recess of the head 16, whereby the expanding jaws 20 are secured against falling out through the respective end stops 34 . Thereafter, the head 16 with the expanding jaws 20 is inserted into the tube 23 and the toothing 28 results in a rotationally fixed connection of the toothed shaft 13 with the rotary drive shaft 14. The head 16 is fixed on the tube 23 by screwing by means of the thread 29.

Wie bereits oben angedeutet, kann durch den modularen Aufbau durch einen Austausch des Kopfes 16 des Werkzeugträgers 9 auf verschiedene Durchmesser zu räumender Öffnungen in einfacher Weise reagiert werden. Weiters können die durch Schraub- und Steckverbindungen miteinander verbundenen Einzelteile des Werkzeugträgers schnell getauscht werden. Durch die einfache Konstruktion des Werkzeugträgers 9 in seinem Mittelteil mit dem Rohr 23 sowie der darin im Hohlraum 12 geführten Welle 14 ergibt sich eine einfache Anpassung an verschiedene Lochsteinlängen, wobei der Außendurchmesser des Rohres 23 auf den kleinsten, in Frage kommenden Lochsteindurchmesser bzw. Durchmesser einer Auskleidung abgestimmt ist. Neben Verwendung unterschiedlicher Ausbildungen von Köpfen 16 kann unterschiedlichen Durchmessern der Lochsteine bzw. Auskleidungen auch durch einfaches Wechseln der Backen 20 Rechnung getragen werden. Ingesamt ergibt sich somit die Möglichkeit mit wenigen Einzelteilen das Auslangen zu finden, wobei im allgemeinen für eine Anpassung lediglich ein Austausch des Kopfes 16 und/oder der Spreizbacken 20 ausreichend ist, während durch die große Verschiebelänge bzw. den großen Verfahrweg des Werkzeugträgers 9 an der Lafette 8 mit einem einzigen Werkzeugträger, dessen Länge auf die maximale Länge einer zu räumenden Öffnung abgestimmt ist, das Auslangen gefunden werden kann.As already indicated above, the modular structure means that the head 16 of the tool holder 9 can be easily replaced by different diameters of openings to be cleared. Furthermore, the individual parts of the tool holder, which are connected by screw and plug connections, can be quickly replaced. Due to the simple construction of the tool carrier 9 in its middle part The tube 23 and the shaft 14 guided therein in the cavity 12 are easily adapted to different hole block lengths, the outer diameter of the tube 23 being matched to the smallest hole block diameter or diameter of a lining that is possible. In addition to using different designs of heads 16, different diameters of the perforated bricks or linings can also be taken into account by simply changing the jaws 20. Overall, there is thus the possibility of finding sufficiency with just a few individual parts, with in general only one replacement of the head 16 and / or the expanding jaws 20 being sufficient for adaptation, while the large displacement length or the large travel path of the tool carrier 9 on the Mount 8 with a single tool carrier, the length of which is matched to the maximum length of an opening to be cleared, which can be found.

Anstelle der Festlegung eines Kalibrier- bzw. Bohrwerkzeuges durch die Spreizbacken 20, wie dies in Fig. 6 dargestellt ist, ist bei der Ausführungsform gemäß den Fig. 8 und 9, in welchen für gleiche Bauteile die Bezugszeichen der vorangehenden Figuren beibehalten worden sind, am Rohr 23 das Gewinde 29 zur Festlegung des Kopfes 16, welcher bei dieser Ausführungsform das dem Gegenschlaghammer 10 abgewandte freie Ende des Rohres 23 übergreift, verlängert ausgebildet und es ist mit dem Rohr 23 über das Gewinde 29 eine Hülse 38 verschraubt, welche an ihrer Außenseite ein Rundgewinde 39 trägt. In der in Fig. 8 dargestellten Position des gesamten Werkzeugträgers 9 befindet sich der Kopf mit den nicht näher dargestellten Spreizbacken 20 nahe der Führung 24, durch welche das Außenrohr 23 hindurchtritt, wie dies insbesondere in den Fig. 2 und 3 näher dargestellt ist. In dieser Position ist das Außenrohr 23 über die Hülse 38 in einem Bohrkopf 40 verschraubt, der an seiner Innenseite ein mit dem Rundgewinde 39 der Hülse 38 zusammenwirkendes Rundgewinde 41 aufweist. Die Schneiden des Bohrkopfes sind schematisch mit 42 angedeutet. Der Bohrkopf 40 wird in der in Fig. 8 dargestellten Ruheposition durch eine unmittelbar an den die Führung 24 tragenden mit der Lafette verbundenen Support 43 anschließende Halteeinrichtung 44 gehalten. In dieser hält ein von einem Zylinder 45 betätigbarer Schieber 46 über ein U-förmig ausgebildetes Ende bzw. Klauen 47 den Bohrkopf 40 in Anlage an den Support 43. Der U-förmige, gabelförmige Endbereich 47 des Schiebers 46 übergreift dabei einen im wesentlichen als Vierkant ausgebildeten Bereich 48 des Bohrkopfes 40 und sichert diesen somit gegen eine axiale Verschiebung und eine Drehbewegung. Die korrekte Position der Bohrkrone 40 relativ zum Support 43 bzw. der Halteeinrichtung 44 wird weiters durch einen mit der Haltevorrichtung 44 starr verbundenen, rohrförmigen Fortsatz 49 gesichert. Nach einem Verschrauben des Außenrohres 23 über die Hülse 38 in der Bohrkrone 40 wird nach einem Absenken des Zylinderkolbenaggregates 45 und des damit verbundenen Schiebers 46 die Bohrkrone 40 freigegeben und bei einer in derselben Richtung wie das Einschrauben der Hülse 38 in die Bohrkrone 40 erfolgenden Drehbewegung des gesamten Werkzeugträgers 9 über den bereits oben erwähnten Drehantrieb erfolgt durch Mitnahme der Bohrkrone 40 die Möglichkeit eines Ausbohrens des Bohrloches, aus welchem zuvor mittels der Spreizbacken 20 die verschlissenen Auskleidungssteine entfernt wurden. Die Bewegung des gesamten Werkzeugträgers 9 in axialer Richtung erfolgt dabei wiederum über den Verschiebeantrieb der Lafette.Instead of specifying a calibration or drilling tool by the expanding jaws 20, as shown in FIG. 6, in the embodiment according to FIGS. 8 and 9, in which the reference numerals of the preceding figures have been retained for the same components, on Tube 23 extends the thread 29 for fixing the head 16, which in this embodiment extends over the free end of the tube 23 facing away from the counterblow hammer 10, and it is screwed to the tube 23 via the thread 29, a sleeve 38, which is on the outside thereof Round thread 39 carries. In the position of the entire tool carrier 9 shown in FIG. 8, the head with the expanding jaws 20, not shown, is located near the guide 24, through which the outer tube 23 passes, as is shown in particular in FIGS. 2 and 3. In this position, the outer tube 23 is screwed via the sleeve 38 into a drill head 40, which has on its inside a round thread 41 which interacts with the round thread 39 of the sleeve 38 having. The cutting edges of the drill head are indicated schematically at 42. The drill head 40 is held in the rest position shown in FIG. 8 by a holding device 44 directly adjoining the support 43 which carries the guide 24 and is connected to the mount. In this, a slide 46, which can be actuated by a cylinder 45, holds the drilling head 40 in contact with the support 43 via a U-shaped end or claws 47. The U-shaped, fork-shaped end region 47 of the slide 46 overlaps one essentially as a square trained area 48 of the drill head 40 and thus secures it against axial displacement and rotation. The correct position of the drill bit 40 relative to the support 43 or the holding device 44 is further ensured by a tubular extension 49 rigidly connected to the holding device 44. After screwing the outer tube 23 over the sleeve 38 in the drill bit 40, after lowering the cylinder piston unit 45 and the associated slide 46, the drill bit 40 is released and when the sleeve 38 is rotated in the same direction as the screwing into the drill bit 40, the rotary movement of the Entire tool carrier 9 via the rotary drive already mentioned, by taking the drill bit 40 with it, there is the possibility of drilling out the borehole, from which the worn lining stones were previously removed by means of the expanding jaws 20. The movement of the entire tool carrier 9 in the axial direction in turn takes place via the displacement drive of the mount.

Bei der Darstellung gemäß Fig. 8 ist lediglich der Kopf 16 sowie der vordere Abschnitt 13 der Zahnwelle mit der Verzahnung bzw, dem Kupplungsstück 28 im Detail dargestellt, wobei über die Verzahnung 28 die Verbindung der Zahnwelle 13 mit dem zweiten Abschnitt der Drehantriebswelle 14 analog der Ausbildung gemäß den Fig. 2 und 3 erfolgt.8, only the head 16 and the front section 13 of the toothed shaft with the toothing or the coupling piece 28 are shown in detail, the connection of the toothed shaft 13 to the second section of the rotary drive shaft 14 being analogous to that via the toothing 28 Training takes place according to FIGS. 2 and 3.

Nach einem erfolgten Ausbohren wird der gesamte Werkzeugträger 9 mit der daran festgelegten Bohrkrone 40 wiederum in eine Lage in axialer Richtung verschoben, in welcher die Bohrkrone 40 die in Fig. 8 dargestellte Position nahe dem Support 43 und der Halteeinrichtung 44 einnimmt. Nach einer Festlegung der Bohrkrone 40 über den Schieber 46 und die die Bohrkrone im Bereich 48 umgreifenden Klauen 47 wird das Rohr 23 durch eine Drehbewegung im umgekehrtem Sinn mitsamt der Hülse 38 aus der Bohrkopf 40 herausgeschraubt, wodurch der Werkzeugträger 9 mit dem Kopf 16 wiederum vollkommen vom Bohrkopf 40 getrennt wird. Für die Begrenzung der Einschraubbewegung des Rohres 23 mit der Hülse 38 in das Innere des Bohrkopfes 40 als auch als Verdrehsicherung des Bohrkopfes 40 bei einem Aufbohren des Bohrloches dienen dabei die miteinander zusammenwirkenden Anschlagflächen 50 (am der Bohrkrone zugewandten Ende des Kopfes 16) und 51 am Vorderende des Bohrkopfes 40. Anstelle der Rundgewinde 39 und 41 können entsprechend belastbare Spindelgewinde wie z.B. ein Trapezgewinde vorgesehen sein.After drilling has taken place, the entire tool carrier 9 with the drill bit 40 attached to it is again moved into a position in the axial direction in which the drill bit 40 assumes the position shown in FIG. 8 near the support 43 and the holding device 44. After the drill bit 40 has been fixed via the slide 46 and the claws 47 encompassing the drill bit in the region 48, the pipe 23 is unscrewed together with the sleeve 38 from the drill head 40 by a rotational movement in the opposite direction, as a result of which the tool carrier 9 with the head 16 is again perfect is separated from the drill head 40. For the limitation of the screwing-in movement of the tube 23 with the sleeve 38 into the interior of the drill head 40 and also to prevent the drill head 40 from rotating when the borehole is being drilled, the mutually interacting stop surfaces 50 (on the end of the head 16 facing the drill bit) and 51 on Front end of the drill head 40. Instead of the round threads 39 and 41, correspondingly resilient spindle threads such as a trapezoidal thread may be provided.

Claims (11)

  1. An apparatus for removing worn nozzle bricks or linings in tap holes in metallurgical vessels, with an expanding device (20), which can be inserted into the nozzle brick or tap hole, and with a drive for withdrawing the nozzle brick or the lining by means of the expanding device, characterised in that the expanding device (20) is disposed on a tool carrier (9) which can be conveyed in axial direction on a support, in particular a carriage (8), and in that the tool carrier (9) can be connected with at least one drive.
  2. An apparatus according to Claim 1, characterised in that the tool carrier (9) has an axial cavity (12) in which a toothed shaft (13, 14) is rotatably mounted, and in that the toothed shaft (13) meshes with a toothing of at least two, preferably three, expanding jaws (20) guided displaceably in radial direction in the tool carrier (9).
  3. An apparatus according to Claim 1 or 2, characterised in that the tool carrier (9) is rotatably mounted in the support or on the carriage (8) and can be locked in a manner precluding rotation in relation to the support or the carriage.
  4. An apparatus according to Claim 1, 2 or 3, characterised in that a rotary drive can be connected with the toothed shaft (13, 14) and an impact drive, in particular a counterblow hammer (10), can be connected with the toothed shaft (13, 14).
  5. An apparatus according to any one of Claims 1 to 4, characterised in that the toothed shaft (13, 14) has at least one axial passage (15) which is connected to nozzles or outlet openings (17) near to the free end of the tool carrier (9) and a connection (18, 19) for fluid.
  6. An apparatus according to Claim 5, characterised in that the fluid connection on the support or carriage (8) has an annular passage (19) in which radial bores (18) discharge into the axial passage (15) of the toothed shaft (13, 14).
  7. An apparatus according to any one of Claims 1 to 6, characterised in that the toothed shaft (13) is connected displaceably in axial direction and fixed to rotate with a rotary drive shaft (14) via a toothing (28).
  8. An apparatus according to any one of Claims 1 to 7, characterised in that the head part (16) of the tool carrier (9) carrying the expanding jaws (20) is releasably connected via a screw-thread (29) with the part of the tool carrier (9) which can be connected with the impact drive (10).
  9. An apparatus according to Claim 8, characterised in that, for connecting the tool carrier (9) with the head part (16) of the tool carrier (9), the screw-thread (29) has a root diameter which is larger than the outer diameter of the toothed shaft (13) connected to the rotary drive shaft (14).
  10. An apparatus according to Claim 8 or 9, characterised in that a sleeve (38) is screwed on to the screw-thread (29), which on its outside has a round thread (39) or a trapezoidal thread on to which a boring head (40) can be screwed against an abutment (51) of the tool carrier (9, 16).
  11. An apparatus according to Claim 10, characterised in that the boring head (40), which can be screwed on to the sleeve (38), has an abutment (48) for separate means for preventing relative rotation, which co-operates with releasable abutment (46, 47) on the support (43, 44).
EP90908154A 1989-06-09 1990-06-08 Device for removing worn nozzle bricks or nozzle linings from metallurgical vessels Expired - Lifetime EP0428661B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1427/89 1989-06-09
AT142789 1989-06-09

Publications (2)

Publication Number Publication Date
EP0428661A1 EP0428661A1 (en) 1991-05-29
EP0428661B1 true EP0428661B1 (en) 1993-10-27

Family

ID=3513671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90908154A Expired - Lifetime EP0428661B1 (en) 1989-06-09 1990-06-08 Device for removing worn nozzle bricks or nozzle linings from metallurgical vessels

Country Status (13)

Country Link
US (1) US5133534A (en)
EP (1) EP0428661B1 (en)
JP (1) JPH04500266A (en)
KR (1) KR920700296A (en)
AT (1) ATE96465T1 (en)
AU (1) AU633929B2 (en)
BR (1) BR9006796A (en)
CA (1) CA2033185A1 (en)
DE (1) DE59003235D1 (en)
ES (1) ES2047934T3 (en)
HU (1) HU213077B (en)
WO (1) WO1990015161A1 (en)
ZA (1) ZA904465B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0767022A1 (en) * 1995-10-02 1997-04-09 Böhler Druckluft und Hydraulik Baugeräte GmbH Apparatus for changing nozzle bricks

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
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.
AT408964B (en) * 1997-12-02 2002-04-25 Boehler Pneumatik Internat Gmb METHOD AND DEVICE FOR REPLACING THE LINING OF A TAP OPENING OF METALLURGICAL VESSELS
US5925312A (en) * 1998-06-17 1999-07-20 China Steel Corporation Push-pull apparatus adapted for assembling and disassembling a tubular body that is to be fitted into a ring retainer on a wall member
CN1083745C (en) * 1998-06-19 2002-05-01 中国钢铁股份有限公司 Assembling deassembing machine for jogged member
US6663825B2 (en) 1999-07-19 2003-12-16 Louis A. Grant, Inc. Method and apparatus for installing or replacing a furnace tap hole insert
US6221313B1 (en) * 1999-11-15 2001-04-24 North American Refractories Co. Taphole knockout device
KR20010095093A (en) * 2000-03-31 2001-11-03 그랜트 루이스에이 주니어 Method and apparatus for replacing a tap hole liner in a basic oxygen furnace/QBOP/AOD and all other types of converter vessels
KR100480359B1 (en) * 2000-05-16 2005-04-06 주식회사 포스코 Apparatus for grouting nozzle brick
KR100729111B1 (en) * 2001-05-04 2007-06-14 주식회사 포스코 The support crushing apparatus for sleeve of converter tapping hole
CH708284B1 (en) 2013-07-11 2023-11-15 Refractory Intellectual Property Gmbh & Co Kg Method and changing device for automatically changing a pouring sleeve of a sliding closure on a metallurgical vessel.
CN103801685B (en) * 2014-02-26 2016-01-20 北京首钢国际工程技术有限公司 A kind of ladle bottom blowing air brick detaching device and method of work thereof
CN106424695B (en) * 2016-08-26 2018-08-14 洛阳利尔耐火材料有限公司 A kind of split type air brick positioning lifting device

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AT292934B (en) * 1964-11-25 1971-09-10 Benteler Geb Paderwerk Bottom closure for steel ladles
FR2409809A1 (en) * 1977-11-29 1979-06-22 Daussan Henri Jean MANEUVERING DEVICE FOR CASTING TUBE OR NOZZLE
US4381102A (en) * 1979-10-29 1983-04-26 Flo-Con Systems, Inc. Shroud support and method for shroud engagement with teeming valve
LU83478A1 (en) * 1981-07-08 1983-04-06 Wurth Paul Sa DEVICE FOR COUPLING A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO THE WORKING TOOL OF A DRILLING MACHINE
GB8302170D0 (en) * 1983-01-26 1983-03-02 Mds Furnace Services Ltd Furnace delining apparatus
AT386422B (en) * 1986-11-13 1988-08-25 Voest Alpine Ag DEVICE FOR REMOVING HOLE STONES INSERTED IN THE TAPPING OPENING OF METALLURGICAL VESSELS
GB8722156D0 (en) * 1987-09-21 1987-10-28 Ims Lycrete Ltd Treatment of metallurgical vessels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0767022A1 (en) * 1995-10-02 1997-04-09 Böhler Druckluft und Hydraulik Baugeräte GmbH Apparatus for changing nozzle bricks

Also Published As

Publication number Publication date
CA2033185A1 (en) 1990-12-10
EP0428661A1 (en) 1991-05-29
BR9006796A (en) 1991-08-06
JPH04500266A (en) 1992-01-16
WO1990015161A1 (en) 1990-12-13
HU213077B (en) 1997-02-28
ATE96465T1 (en) 1993-11-15
HUT60790A (en) 1992-10-28
AU633929B2 (en) 1993-02-11
AU5745090A (en) 1991-01-07
ZA904465B (en) 1991-04-24
US5133534A (en) 1992-07-28
ES2047934T3 (en) 1994-03-01
HU905215D0 (en) 1992-02-28
KR920700296A (en) 1992-02-19
DE59003235D1 (en) 1993-12-02

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