EP0624204B1 - Stichlochbohrmaschine für schachtofen - Google Patents

Stichlochbohrmaschine für schachtofen Download PDF

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Publication number
EP0624204B1
EP0624204B1 EP93901736A EP93901736A EP0624204B1 EP 0624204 B1 EP0624204 B1 EP 0624204B1 EP 93901736 A EP93901736 A EP 93901736A EP 93901736 A EP93901736 A EP 93901736A EP 0624204 B1 EP0624204 B1 EP 0624204B1
Authority
EP
European Patent Office
Prior art keywords
mounting
clamp
rod
guides
channel
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
EP93901736A
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English (en)
French (fr)
Other versions
EP0624204A1 (de
Inventor
Emile Lonardi
Jean Metz
Pierre Mailliet
Guy Thillen
Radomir Andonov
Philippe Malivoir
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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Filing date
Publication date
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0624204A1 publication Critical patent/EP0624204A1/de
Application granted granted Critical
Publication of EP0624204B1 publication Critical patent/EP0624204B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes

Definitions

  • the present invention relates to a machine for drilling a tap hole of a shaft furnace, designed for implementing the method called "lost rod method" in which, after having closed the tap hole with a mass plugging, a metal rod is inserted into the latter, before its complete hardening, and the latter is extracted at the desired time for the opening of the tap hole.
  • Said machine comprises a mount for supporting the rod during said process, a drive means mounted on the mount so as to develop a traction force, respectively of thrust parallel to the mount, a coupling member for coupling said means drive the rod so as to transmit said tensile force to it during its extraction.
  • Document FR-A-2520857 discloses a clamp designed to be mounted on the bi-directional striker drill of a conventional taphole drilling machine.
  • the normal coupling of the drill used to communicate a rotational movement to a drill, is exchanged against this clamp. The latter then makes it possible to couple the drill to the rear end drill rod and remove it by operating a powerful striker secured to the drill.
  • Document EP-A-0379018 discloses a drilling machine for implementing the "lost rod process" which does not use a striker for the extraction of the drilling rod from the hardened plugging mass.
  • the proposed machine uses a clamp movable at the front of the carriage by a powerful hydraulic cylinder whose stroke is, for reasons of space, significantly smaller than the length of the drilling rod to be extracted.
  • This cylinder has the pliers make several strokes near the front end of the mount to extract the rod from its total length from the hole of casting. It follows that the extracted drilling rod - which is hot, deformed and dirty - must completely pass through this extraction clamp. In addition, the extraction clamp is exposed to the projected splashes from the tap hole when it is opened.
  • Document EP-A-0379018 contains no indication how the piercing rod could be introduced without a striker into the plugging mass previously injected into the tap hole.
  • Document EP-A-0379018 therefore provides only an imperfect solution for the extraction of the piercing rod without striker and no solution at all for the introduction of the piercing rod without striker into the plugging mass.
  • the object of the present invention is to provide a machine for drilling a tap hole of a shaft furnace, which is designed for implementing the "lost rod method", and which makes it possible to dispense with '' a powerful bi-directional striker both for extracting the piercing rod from the plugging mass and for its introduction into the plugging mass.
  • the metal rod is guided, during the insertion operation, by intermediate guides mounted on the carriage and surrounding the rod in several places.
  • These intermediate supports prevent the rod from starting to flame when one applies, by means of the sliding pliers, provided with its key and driven by a powerful driving means, an appreciable axial thrust at one end of the rod for driving its opposite end into the plugging mass with which the tap hole was previously sealed.
  • Document GB-A-2095381 presents a drilling machine provided with an intermediate support between an impact drill and the front support of the drilling machine.
  • the purpose of this intermediate support is to avoid a cantilever support for a drilling rod or a drill bit in the coupling of the impact drill. Such a cantilever support could possibly occur, if the front end of the drill rod or bit was consumed in the tap hole.
  • the aforementioned document explicitly recommends the introduction of the piercing rod into the obturation mass using a striker secured to the drill.
  • Document US-A-5,069,430 relates to a machine for drilling a taphole of a shaft furnace which is exclusively equipped for drilling the taphole using a rotary drilling machine driving a cutting head drill. More specifically, it is proposed to work with a drill comprising several segments of rods coupled to one another. To prevent these coupled segments from forming an arrow, when the drill is supported on the carriage of the machine, it is proposed to support the drill, between the front support and the drill by a movable support attached to an endless chain. Too large a deflection of the drill bit supported on the mount would cause the drill bit to deviate from its ideal trajectory.
  • the main advantage of the present machine is to be able to introduce the rod all at once in the blocking mass without having to use a noisy striker imposing significant vibration stresses on the equipment and on the machine.
  • Another advantage of the present invention resides in the fact of being able to extract the piercing rod from the plugging mass by coupling the clamp to the rear end of the rod and then withdrawing the clamp towards the rear end of the mount .
  • An additional advantage of the machine according to the invention is that there is no need to disassemble the pliers, used for the application of said "lost rod process", when one wants to drill the tap hole with the using a conventional drill.
  • the present invention however also proposes preferential solutions making it possible to put said guides automatically, that is to say without stopping the introduction movement and without intervention of the operator of the machine, in a position which does not interfere with the clamp. as it advances towards the front of the carriage.
  • said guides can therefore slide on the carriage. They can then be provided with their own drive system to drive them to a garage position, at the front of the carriage, as and when they risk hampering the progress of the clamp. However, they can also be advantageously driven or pushed, by the clamp drive means or by the clamp itself in a garage position at the front of the carriage as the advancement of the pliers.
  • the present invention also provides preferential solutions for automatically rearranging said sliding guides on the carriage in their initial operating position, that is to say that which corresponds to the start of the rod introduction operation. .
  • said guides each consist of two halves surrounding, when assembled, the rod circumferentially over a certain length.
  • the two halves are separated laterally by means appropriate, thus freeing the path of the clamp.
  • the drive means selected for the clamp preferably comprises one or more endless chains mounted on the carriage and driven by at least one powerful motor, the direction of rotation of which can be reversed to guarantee both the insertion operation and the rod extraction operation.
  • this drive means with hydraulic cylinders or a screw and nut system, or a combination of several of these systems.
  • the frame of the drilling machine is constituted by a mount 20.
  • This mount is for example supported in a conventional and known manner at the end of a support arm (not shown).
  • This support arm can pivot around a console to move the drilling machine between a garage position and an operative position and vice versa.
  • the mount 20 can for example be formed of two parallel beams 20a, 20b joined together.
  • the two beams 20a and 20b have, on their inner face, two rails 22 and 24 arranged face to face. Only the rail 22 is shown in Figure 1.
  • the reference 26 designates a piercing rod, also called a “lost rod”, used in said "lost rod method” described in the preamble.
  • a support 28 which is preferably a screen support of the kind proposed by European patent application EP 0 064 644.
  • This comprises two flaps mounted at the front of the mount 20 , that is to say in front of the tap hole when the machine is in the operative position. These flaps can pivot between an open position facilitating the engagement and gripping of the rod 26 for the extraction thereof and a closed position in which they define a support opening for the rod 26.
  • the two flaps constitute thus a support and at the same time form a splash protection shield coming from the jet leaving the tap hole when the latter opens.
  • It is preferably a hydraulic motor whose direction of rotation can be reversed by a suitable control system.
  • Reference 34 designates a clamp intended for the introduction and extraction of the rod 26. It is preferably the clamp described below.
  • the clamp 34 is supported by a carriage 36 sliding freely along the mount 20, for example using the pads 37 guided in the rails 22 and 24 mounted on the two beams 20a and 20b of the mount 20.
  • the carriage 36 is fixed to the endless chain 44 and can be driven by the latter between a stop 50 mounted at the front of the carriage 20 and a stop 51 mounted at the rear of the carriage 20 and vice versa.
  • the stroke between the two stops 50 and 51 is approximately equal to the length of the rod.
  • the carriage 36 can also support a working member 32.
  • This working member which is provided with a coupling 30 for a conventional drill usually comprises a rotary impact drill. Its presence is justified to be able to drill, if necessary, a tap hole with the conventional drill. It should however be emphasized that the working member 32 is not used in the lost rod process and that it could be removed if conventional drilling of the tap hole is never used, or if this drilling can be done in another way. Of course the working member 32 could also have its own carriage and its own drive means.
  • the rod 26 is loaded into the machine when the latter is in the garage position and when the clamp 34 occupies a position at the rear of the carriage (see Figure 1).
  • the loading is carried out by threading the rod 26 into the clamp 34 and introducing it into several intermediate guides (55 1 , 55 2 , 55 3 ), which are placed in several places almost equidistant from each other on the carriage 20.
  • These guides (55i) is to prevent buckling of the rod 26 when the clamp 34 applies an axial thrust thereto during the insertion operation.
  • the number of intermediate guides and their spacings will be determined as a function of the characteristics of the rod (diameter, length, material, etc.) and of the force necessary to introduce the rod 26 into the blocking mass. .
  • This effort is mainly determined by the characteristics of the blocking mass and, inter alia, by its hardening speed.
  • each guide (55i) must surround the rod 26 so as to avoid any lateral escape of the latter when the latter is subjected to an axial thrust at its end opposite the taphole.
  • the distance between two successive guides must not be too great, otherwise there is a risk of the rod 26 buckling between two guides (55i), which may lead to the limit of complete blockage of the rod between these two guides.
  • Figure 2 shows the end of the insertion operation.
  • the carriage 36 is stopped against the stop 50 and the three intermediate guides 55 1 , 55 2 , 55 3 are located, one against the other, in the garage position in front of the carriage 36.
  • Figure 3 shows a preferred embodiment of a sliding guide. It has a hook 56 which is for example engaged with grooves in its feet 57 between the lower flanges of the beams 20a and 20b forming the mount. It should be noted that the mounting of the hook must allow it to slide on the carriage 20, while avoiding warping of the hook when it is subjected to offset forces.
  • the latter has a defined lateral notch by two horizontal edges which are spaced a distance slightly greater than the diameter of the rod 26.
  • this lateral notch is closed using 'A part 58 which is perpendicular to the two horizontal edges, in order to clearly define the rod 26 and to prevent it from escaping laterally from the hook 56.
  • the part 58 can be articulated on the hook 56 and can be advantageously provided with a lever 59 in order to be able to easily close and open said lateral notch manually. It would however also be possible to fully automate this opening and closing of said notch.
  • the latter consist of two symmetrical halves which can be separated laterally from the rod 26 when the clamp 34 is approached. From the operating point of view, this variant is strictly equivalent to the predescribed variant of the sliding guides; it will therefore not be described in detail below.
  • the present invention also provides a preferred embodiment which allows the guides (55i) to be brought back from their garage position to the front of the carriage, which they occupy at the end of the operation for introducing the rod in the closure mass, in their operative position which they must occupy at the start of said introduction operation.
  • a similar effect can moreover, be obtained by connecting the sliding guides 55 1 , 55 2 , 55 3 to each other and to the carriage 36 by rods 54 1 , 54 2 , 54 3 , guided in eyelets 60, 60 ′ integral with the hooks 56 (cf. Figures 3 and 4).
  • rods 54 1 , 54 2 , 54 3 guided in eyelets 60, 60 ′ integral with the hooks 56 (cf. Figures 3 and 4).
  • These rods could of course also be replaced by chains or telescopic rods.
  • the clamp 34 preferably used on a machine according to the present invention is shown in Figures 5, 5a, 6 and 6a.
  • This clamp 34 comprises a clamp body 75 crossed axially by a bore or channel 74 having a diameter slightly larger than the rod 26.
  • it is a uni-directional clamp designed for the extraction of the rod 26, that is to say that it comprises 2 jaws 70, 72 arranged symmetrically around the axial channel 74 and displaceable obliquely towards the axis of this channel 74 in the direction of the front of the carriage. It follows that under the action of a pull towards the rear of the carriage, allowing the operation and the extraction of the rod, the jaws 70, 72 automatically bite into the end of the rod 26 placed in the channel 74 and thus ensure perfect coupling of the clamp 34 with the rod 26. However, this is not the case during the introduction of the rod.
  • this uni-directional clamp can however also be used with the present machine for the introduction of the rod 26 into the plugging mass.
  • the present invention proposes to arrange in the channel 74, behind the jaws 70, a mechanical stop in order to provide a fulcrum for the rod 26 during said insertion operation.
  • this removable mechanical stop is achieved by introducing a key 78 into a mortise 76 which crosses the channel 74 perpendicularly.
  • This key 78 which has a height slightly greater than the diameter of the rod 26, is secured in 80 against inadvertent displacement.
  • a key 78 actuated for example by a pneumatic circuit which would avoid human intervention on the clamp even to close or open said channel 74.
  • the free end of the latter is threaded into the clamp 34 which is stopped against the stop 50.
  • the clamp 34 is closed by actuating the jaws 70 and 72 which grip said end of the rod.
  • the motor 42 is actuated to withdraw the carriage 36 towards the stop 51.
  • the intermediate guides 55 1 , 55 2 , 55 3 serve as intermediate supports for the rod as the latter is removed from the tap hole.
  • the screen support 28 is preferably closed so as to protect the front of the mount against splashing.
  • the present invention provides a machine which makes it possible to introduce a piercing rod into the plugging mass without striker, by exerting on the end of the latter a simple powerful axial thrust, which has been judged as not possible until now.
  • this machine is distinguished by a simple and robust design, and it will be appreciated, among other things, that it provides better environmental protection by an almost silent operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)

Claims (8)

  1. Maschine zum Bohren eines Abstichlochs eines Schachtofens, aufweisend
    eine Lafette (20), um entweder eine Abstechstange (26), oder einen Bohrer (27) zu tragen, wobei die Lafette (20) ein vorderes Ende aufweist, das gegenüber dem Abstichloch angeordnet werden kann, und ein zu dem vorderen Ende axial entgegengesetztes, hinteres Ende aufweist,
    eine Bohrmaschine (32), mit einer Kupplung (30), die ausgelegt ist, um den Bohrer (27) aufzunehmen und anzutreiben, wobei die Bohrmaschine (32) auf der Lafette (20) verschiebbar angebracht ist,
    ein Antriebsmittel (42, 44), das auf der Lafette (20) so angebracht ist, daß es parallel zu der Lafette (20) eine Zugkraft bzw. eine Schubkraft entwickelt,
    eine Zange (34), die zwischen dem vorderen Ende der Lafette (20) und der Bohrmaschine (32) auf der Lafette (20) angebracht ist, und mit dem Antriebsmittel (42, 44) verbunden ist, wobei die Zange (34) einen Körper (75) aufweist, durch den ein Kanal (74) axial hindurchgeht, der einen ein wenig größeren Durchmesser als die Abstechstange (26) und der Bohrer (27) hat, verschiebbare Backen (70, 72) aufweist, die um den Kanal (74) herum angeordnet sind, und die so ausgelegt sind, daß sie das hintere Ende der in den Kanal (74) eingeschobenen Abstechstange (26) festklemmen können, um eine große Zugkraft darauf zu übertragen, wenn die Zange (34) in Richtung des hinteren Endes der Lafette (20) verschoben wird,
       dadurch gekennzeichnet,
    daß die Zange (34) mittels dieses Antriebsmittels (42, 44) längs der Lafette (20) über eine Länge verschiebbar ist, die ungefähr der Länge der Abstechstange (26) entspricht,
    daß ein Keil (78) in einen Sitz (76) des Körpers (75) der Zange (34) so einschiebbar ist, daß der Kanal (74) axial verschlossen wird, und auf das in den Kanal (74) eingeschobene, hintere Ende des Abstechstange (26) eine axiale Schubkraft übertragen werden kann, wenn die Zange (34) in Richtung des vorderen Endes der Lafette (20) verschoben wird,
    daß der Keil (78), wenn er aus seinem Sitz (76) herausgezogen wird, den Kanal (74) der Zange (34) freigibt, so daß der Bohrer (27) durch diesen Kanal (74) hindurchgeschoben werden kann und an die Kupplung (30) der zwischen der Zange (34) und dem hinteren Ende der Lafette (20) angeordneten Bohrmaschine (32) angekuppelt werden kann,
    daß auf der Lafette (20) zwischen dem vorderen Ende der Lafette (20) und der Zange (34) Zwischenführungen (55i) angebracht sind, wobei diese Zwischenführungen (55i) auf der Lafette Arbeitspositionen haben, in denen sie die Abstechstange (26) an mehreren, axial voneinander entfernten Stellen beim Einschieben in das zuvor mit der Verschlußmasse verschlossene Abstichloch umschließen, und Parkpositionen haben, in denen sie das Vorschieben der Zange (34) nach dem vorderen Ende der Lafette (20) nicht behindern, und
    daß diese Zwischenführungen (55i) in dem Maße, wie die Zange (34) in Richtung des vorderen Endes der Lafette (20) vorgeschoben wird, von den Arbeitspositionen in die Parkpositionen verschiebbar sind.
  2. Maschine gemäß Anspruch 1, dadurch gekennzeichnet, daß die Zwischenführungen (55i) auf der Lafette verschiebbar sind.
  3. Maschine gemäß Anspruch 2, dadurch gekennzeichnet, daß die Zwischenführungen (55i) auf der Lafette (20) so angebracht sind, daß sie in dem Maße, wie die Zange (34) nach dem vorderen Ende der Lafette (20) vorgeschoben wird, durch die Zange (34) von ihrer anfänglichen Arbeitsposition nach einer an dem vorderen Ende der Lafette gelegenen Parkposition geschoben werden.
  4. Maschine gemäß Anspruch 3, dadurch gekennzeichnet, daß jede Zwischenführung (55i) in dem Maße, wie die Zange (34) von dem vorderen Ende nach dem hinteren Ende der Lafette (20) zurückgeschoben wird, durch das Antriebsmittel von der Parkposition an dem vorderen Ende der Lafette (20) nach ihrer anfänglichen Arbeitsposition verschiebbar ist.
  5. Maschine gemäß irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Zwischenführungen (55i) aus Haken (56) bestehen, die auf der Lafette (20) verschiebbar sind und einen seitlichen Einschnitt aufweisen, der ermöglicht, die Abstechstange (26) darin unterzubringen, und daß der seitliche Einschnitt mit einem Teil (58) versehen ist, mit dem er seitlich verschlossen werden kann, nachdem die Abstechstange (26) darin untergebracht wurde.
  6. Maschine gemäß irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das auf der Lafette (20) angebrachte Antriebsmittel mindestens eine endlose Kette (44) aufweist, die auf der Lafette (20) axial angebracht ist, und mindestens einen Antriebsmotor (42) aufweist, dessen Rotationsrichtung umgekehrt werden kann.
  7. Maschine gemäß Anspruch 6, dadurch gekennzeichnet, daß der Motor (42) ein hydraulischer Motor ist.
  8. Maschine gemäß irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet,
    daß die Zange (34) und die Bohrmaschine (32) von einem gemeinsamen Wagen (36) getragen werden, der in Schienen (22, 24) der Lafette (20) verschiebbar ist, und
    daß dieser Wagen (36) mit dem Antriebsmittel (42, 44) verbunden ist.
EP93901736A 1992-01-27 1993-01-07 Stichlochbohrmaschine für schachtofen Expired - Lifetime EP0624204B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU88059 1992-01-27
LU88059A LU88059A1 (fr) 1992-01-27 1992-01-27 Machine de percage d'un trou de coulee d'un four a cuve
PCT/EP1993/000013 WO1993015231A1 (fr) 1992-01-27 1993-01-07 Machine de perçage d'un trou de coulee d'un four a cuve

Publications (2)

Publication Number Publication Date
EP0624204A1 EP0624204A1 (de) 1994-11-17
EP0624204B1 true EP0624204B1 (de) 1997-04-16

Family

ID=19731337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93901736A Expired - Lifetime EP0624204B1 (de) 1992-01-27 1993-01-07 Stichlochbohrmaschine für schachtofen

Country Status (9)

Country Link
US (1) US5476250A (de)
EP (1) EP0624204B1 (de)
JP (1) JP3423309B2 (de)
CN (1) CN1030840C (de)
BR (1) BR9305841A (de)
DE (1) DE69309898T2 (de)
LU (1) LU88059A1 (de)
TW (1) TW227576B (de)
WO (1) WO1993015231A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU88203A1 (fr) * 1992-12-16 1994-09-09 Wurth Paul Sa Machine combinée pour le perçage et le bouchage d'un trou de coulée d'un four à cuve
US7605763B2 (en) 2005-09-15 2009-10-20 Dell Products L.P. Combination antenna with multiple feed points
TWI316775B (en) 2006-02-24 2009-11-01 Yageo Corp Antenna for wwan and integrated antenna for wwan, gps and wlan
TWI337422B (en) 2006-10-31 2011-02-11 Wistron Neweb Corp Antenna
DE102009009537A1 (de) * 2009-02-18 2010-08-26 Tmt Tapping-Measuring-Technology Gmbh Stichlochbohrmaschine für metallurgische Behälter, insbesondere Öfen mit schmelzflüssigem Inhalt

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111260C2 (de) * 1981-03-21 1992-06-11 Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen Stichlochbohrmaschine
LU83917A1 (fr) * 1982-02-03 1983-09-02 Wurth Paul Sa Dispositif d'accouplement d'une tige de percage du trou de coulee d'un four a cuve a l'outil de travail d'une machine de percage
LU87427A1 (fr) * 1989-01-16 1990-07-24 Wurth Paul Sa Procede et dispositif d'ouverture du trou de coulee d'un four a cuve
US5069430A (en) * 1990-10-26 1991-12-03 Woodings Industrial Corporation Blast furnace tap hole drill with centralizing drill rod support
ATE140980T1 (de) * 1991-10-31 1996-08-15 Wurth Paul Sa Schachtofen-abstichlochbohrer
LU88058A1 (fr) * 1992-01-24 1993-08-17 Paul Wurth S.A. Machine de percage d'un trou de coulee d'un four a cuve
LU88060A1 (fr) * 1992-01-27 1993-08-17 Paul Wurth S.A. Machine de percage d'un trou de coulee d'un four a cuve
ES2125929T3 (es) * 1992-06-17 1999-03-16 Wurth Paul Sa Maquina para perforacion de una piquera de un horno de cuba.

Also Published As

Publication number Publication date
EP0624204A1 (de) 1994-11-17
WO1993015231A1 (fr) 1993-08-05
CN1030840C (zh) 1996-01-31
BR9305841A (pt) 1997-02-18
DE69309898T2 (de) 1997-08-28
DE69309898D1 (de) 1997-05-22
CN1074941A (zh) 1993-08-04
LU88059A1 (fr) 1993-08-17
TW227576B (de) 1994-08-01
JPH07503039A (ja) 1995-03-30
JP3423309B2 (ja) 2003-07-07
US5476250A (en) 1995-12-19

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