EP0271474B1 - Dispositif pour le démontage de briques creuses insérées dans des trous de percée de récipients métallurgiques - Google Patents

Dispositif pour le démontage de briques creuses insérées dans des trous de percée de récipients métallurgiques Download PDF

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Publication number
EP0271474B1
EP0271474B1 EP19870890249 EP87890249A EP0271474B1 EP 0271474 B1 EP0271474 B1 EP 0271474B1 EP 19870890249 EP19870890249 EP 19870890249 EP 87890249 A EP87890249 A EP 87890249A EP 0271474 B1 EP0271474 B1 EP 0271474B1
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EP
European Patent Office
Prior art keywords
extraction
pressure medium
medium cylinder
rod
arrangement according
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
EP19870890249
Other languages
German (de)
English (en)
Other versions
EP0271474A1 (fr
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
Veitscher Magnesitwerke AG
Voest Alpine Industrienlagenbau 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 Veitscher Magnesitwerke AG, Voest Alpine Industrienlagenbau GmbH filed Critical Veitscher Magnesitwerke AG
Publication of EP0271474A1 publication Critical patent/EP0271474A1/fr
Application granted granted Critical
Publication of EP0271474B1 publication Critical patent/EP0271474B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—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 through 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 at the tap opening by means of the pull-out pressure medium cylinder and the pull-out device can be fastened to the machine frame in different longitudinal positions, preferably the pull-out device consisting of a tensioning pull rod, one coaxial to the tensioning Drawbar arranged clamp claw support tube and a coaxial outer and with respect to the clamp claw support tube longitudinally displaceable and rotatable support tube is formed and wherein for fastening the pull-out device on the machine frame, the machine frame has at least one elongated hole, in which at least one of in the longitudinal direction of the support tube arranged one behind the other and can be used on this attached pin.
  • the machine frame is formed by a bridge projecting above 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, 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 arranged coaxially with it 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 pulling rod passing through 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 extends coaxially through the pull-out rod, the tensioning rod at the free end of the pull-out 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 cylinder can advantageously be actuated by means of a single valve, the clamping pressure cylinder having a smaller volume than the pull-out pressure cylinder and that of the valve to the pull-out pressure medium cylinder provided pressure medium lines are provided with throttle valves.
  • 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 section taken along line 111-111 of Fig. 2.
  • 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 with respect to the clamp 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 in the longitudinal direction one behind the other and diametrically opposite to the longitudinal axis 18 of the puller pin 19 arranged in pairs, 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 through 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 fastened 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 provided with handles 25.
  • a hydraulic hand pump 26 coupled to the pull-out pressure medium cylinder 12, the actuating lever of which is designated 27.
  • 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 for retightening the clamping claws 20.
  • the piston 13 of the piston 13 is then pumped by means of the hand pump 26 when its oil pressure relief screw is in the closed position Extending pressure medium cylinder 12 extended, whereby the bridge 9, the tensioning pull rod 22 via the support tube 17 and the tension nut 24 and with it the clamping claws 20 and the clamping claw support tube 16 in the axial direction out of the tap hole 8 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 is also included which is connected to the wedge piece 35 for spreading 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 39 designed as a cylindrical tube and thus receiving and protecting the tensioning pressure medium cylinder 33, to the rear end of which a hydraulic unit 40 is attached, which contains an electrically operated motor 41, a hydraulic pump 42, and a tank 43 and has 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 is arranged at the rear end with projecting handle pieces 49 on both sides. From these handle pieces 49, the operator can press buttons 49 'for the Operate the control of 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 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 application of the device to different perforated stone diameters.
  • the clamping claws 36 are again pulled against one another by a return spring 52 into the starting position, as a result of which the perforated brick 2 can be removed from the pull-out rod 32.
  • the valve is switched over to tensioning and pulling out (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 expansion 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 that in The 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.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Claims (11)

1. Appareil pour retirer des briques percées (2) disposées dans l'ouverture de coulée (8) de reci- pients métallurgiques, qui présente un bâti d'appareil (7; 29, 39) pouvant être appuyé sur le côté extérieur du récipient métallurgique, dans lequel est monté un extracteur (16, 17, 22; 32) s'étendant dans le sens de l'axe de la brique percée (2) et pouvant être déplacé longitudinalement, dans ce sens, au moyen d'un vérin d'extraction (12; 30), l'extrémité de l'extracteur (16; 32), pouvant être introduite à travers la brique percée (2) à l'intérieur du récipient métallurgique, étant munie d'au moins deux griffes de serrage (20; 36) fixées à cette extrémité et pouvant être amenées en prise avec la brique percée (2) et en être détachées au moyen d'un dispositif d'écartement (23, 24; 33, 35).
2. Dispositif selon la revendication 1, caractérisé en ce que le bâti (7) est appuyé près de l'ouverture de coulée (8) au moyen du vérin d'extraction (12), et l'extracteur (16, 17, 22) peut être fixé à différentes positions en longueur sur le bâti (7) (figures 1 à 3).
3. Appareil selon la revendication 2, caractérisé en ce que l'extracteur est formé d'une tige de traction-bridage (22), d'un tube porte-griffes (16), supportant les griffes de serrage, qui est disposé coaxial à la tige de traction-bridage, et d'un tube d'appui (17) disposé coaxialement à l'extérieur et qui est déplaçable longitudinalement et rotatif par rapport au tube porte-griffes, le bâti (7) de l'appareil présentant, pour la fixation de l'extracteur (16, 17, 22) sur lui, au moins un trou oblong (15) dans lequel on peut engager sélectivement au moins l'un de plusieurs tenons (19) disposés les uns derrière les autres dans le sens de la longueur du tube d'appui (17) et fixés à celui-ci (figures 1 à 3).
4. Appareil selon la revendication 2 ou 3, caractérisé en ce que le bâti (7) est formé par un pont (9) enjambant l'ouverture de coulée, dont une extrémité est fixée, de préférence de façon articulée, au récipient métallurgique au moyen d'une suspension (11) et dont l'autre extrémité est appuyée sur le récipient métallurgique avec interposition du vérin d'extraction (12) (figures 1 à 3).
5. Appareil selon une ou plusieurs des revendications 2 à 4, caractérisé en ce que le vérin d'extraction (12) est manocevrable au moyen d'une pompe à main (26) fixée au bâti (7) de l'appareil (figures 1 à 3).
6. Appareil selon une ou plusieurs des revendications 3 à 5, caractérisé en ce que le dispositif d'écartement présente un coin (23) placé entre des faces de glissement (23') des griffes de serrage (20) et déplaçable par la tige de traction-bridage (22), cette tige (22) pouvant être appuyée à l'extrémité libre de l'extracteur (16, 17, 22) au moyen d'un dispositif de bridage tel qu'un écrou (24) (figures 1 à 3).
7. Appareil selon la revendication 1, caractérisé en ce qu'il comprend une barre d'extraction (32) qui est déplaçable par le piston annulaire (31), coaxial à cette barre, d'un vérin d'extraction (30) à double effet, le côté frontal du vérin d'extraction pouvant être appuyé sur le récipient métallurgique et la barre d'extraction (32) traversant le piston annulaire (figures 4 à 8).
8. Appareil selon la revendication 1 ou 7, caractérisé en ce que le dispositif d'écartement présente un coin (35) placé entre des faces de glissement (35') des griffes de serrage (36) et pouvant être déplacé par une barre de bridage (37) traversant coaxialement la barre d'extraction (32), la barre de bridage étant appuyée à l'extrémité libre de la barre d'extraction (32) au moyen d'un dispositif de bridage, tel qu'un vérin de bridage (33) à double effet, dont le piston (34) est relié à la barre de bridage (37) et dont le cylindre (38) est relié à la barre d'extraction (32) (figures 4 à 8).
9. Appareil selon la revendication 8, caractérisé en ce que à la fois le vérin d'extraction (30) et le vérin de bridage (33) sont manoeuvrables au moyen d'une seule soupape (44), le vérin de bridage (33) ayant un plus petit volume que le vérin d'extraction (30) et les conduites de fluide de pression (45, 46) menant de la soupape (44) au vérin d'extraction (33) étant munies de soupapes d'étranglement (50) (figures 4 à 8).
10. Appareil selon une ou plusieurs des revendications 7 à 9, caractérisé en ce que le bâti (29, 39) de l'appareil est équipé d'un groupe hydraulique (40) avec un moteur électrique (41) pour l'alimentation en fluide de pression des vérins (30, 33) (figures 4 à 8).
11. Appareil selon une ou plusieurs des revendications 1 à 10, caractérisé en ce que des mors (21; 51) sont fixés amovibles aux griffes de serrage (20; 36) et sont remplaçables par des mors (21; 51) d'autres types.
EP19870890249 1986-11-13 1987-11-09 Dispositif pour le démontage de briques creuses insérées dans des trous de percée de récipients métallurgiques Expired - Lifetime EP0271474B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT301986A AT386422B (de) 1986-11-13 1986-11-13 Vorrichtung zum ausbau von in die abstichoeffnung metallurgischer gefaesse eingesetzten lochsteinen
AT3019/86 1986-11-13

Publications (2)

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

Family

ID=3544048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870890249 Expired - Lifetime EP0271474B1 (fr) 1986-11-13 1987-11-09 Dispositif pour le démontage de briques creuses insérées dans des trous de percée de récipients métallurgiques

Country Status (4)

Country Link
EP (1) EP0271474B1 (fr)
AT (1) AT386422B (fr)
DE (1) DE3763966D1 (fr)
ES (1) ES2016659B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015161A1 (fr) * 1989-06-09 1990-12-13 Böhler Pneumatik International Gesellschaft M.B.H. Dispositif pour enlever des briques perforees ou des revetements perfores uses de recipients metallurgiques
FR2685653A1 (fr) * 1991-12-31 1993-07-02 Lorraine Laminage Dispositif de refection du revetement interieur d'un trou de coulee notamment d'un convertisseur d'acierie.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT3389B (en) 1990-06-08 1995-08-25 Veitsch Radex Ag Device for removing wearing fashion bricks with hole or lining
CN110303147A (zh) * 2019-07-25 2019-10-08 永兴特种不锈钢股份有限公司 一种浇钢包上水口自动拔出装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT292934B (de) * 1964-11-25 1971-09-10 Benteler Geb Paderwerk Bodenverschluß für Stahl-Gießpfannen
CH452124A (de) * 1967-03-03 1968-05-31 Metacon Ag Einbauvorrichtung für Verschleisssteine in Giessbehältern mit Schieberverschluss
FR2314086A2 (fr) * 1975-06-13 1977-01-07 Usinor Chariot extracteur, notamment pour le service des hauts-fourneaux
FR2454861A1 (fr) * 1979-04-24 1980-11-21 Paris Acieries Laminoirs Procede d'extraction de busettes de poches de coulees et dispositif pour sa mise en oeuvre
WO1985001068A1 (fr) * 1983-08-20 1985-03-14 Brohltal-Deumag Ag Für Feuerfeste Erzeugnisse; Appareil d'extraction pour une pierre refractaire d'injection de gaz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015161A1 (fr) * 1989-06-09 1990-12-13 Böhler Pneumatik International Gesellschaft M.B.H. Dispositif pour enlever des briques perforees ou des revetements perfores uses de recipients metallurgiques
FR2685653A1 (fr) * 1991-12-31 1993-07-02 Lorraine Laminage Dispositif de refection du revetement interieur d'un trou de coulee notamment d'un convertisseur d'acierie.

Also Published As

Publication number Publication date
AT386422B (de) 1988-08-25
ATA301986A (de) 1988-01-15
DE3763966D1 (de) 1990-08-30
ES2016659B3 (es) 1990-11-16
EP0271474A1 (fr) 1988-06-15

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