EP0552476B1 - Machine de perçage d'un trou de coulée d'un four à cuve - Google Patents

Machine de perçage d'un trou de coulée d'un four à cuve Download PDF

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Publication number
EP0552476B1
EP0552476B1 EP92121659A EP92121659A EP0552476B1 EP 0552476 B1 EP0552476 B1 EP 0552476B1 EP 92121659 A EP92121659 A EP 92121659A EP 92121659 A EP92121659 A EP 92121659A EP 0552476 B1 EP0552476 B1 EP 0552476B1
Authority
EP
European Patent Office
Prior art keywords
rod
clamp
mounting
support
taphole
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
EP92121659A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0552476A3 (en
EP0552476A2 (fr
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
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0552476A2 publication Critical patent/EP0552476A2/fr
Publication of EP0552476A3 publication Critical patent/EP0552476A3/fr
Application granted granted Critical
Publication of EP0552476B1 publication Critical patent/EP0552476B1/fr
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
    • 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

Definitions

  • the present invention relates to a machine for drilling a tap hole of a shaft furnace, designed for implementing the method of the lost rod in which, after having closed the tap hole with a plugging mass, pushes a metal rod into it, before it has completely hardened, and it is extracted at the appropriate time with a view to opening the tap hole.
  • Said machine comprises a carriage with a support installed on the carriage so as to support the rod at the front of the carriage, a rear support movable on the carriage and provided with means for being coupled to the rear end of the rod and a clamp slidably mounted on the carriage and designed to grip the rod at any location between said front support and said rear support.
  • the working body of these machines must include a mandrel with a coupling clamp for the rod and, above all, a powerful bi-directional pneumatic striker to deploy the energy necessary for the introduction and extraction of the rod. of piercing lost.
  • Patent application EP 0 379 018 makes it possible to partially remedy these drawbacks by proposing a clever method of extracting the rod in several phases by a reciprocating movement of a clamp under the action of a jack. silent hydraulic.
  • the pneumatic striker must therefore no longer be bi-directional, since it is no longer used for extraction, but it is, however, still necessary for an efficient and rapid installation of the piercing rod.
  • the disadvantages of the striker could encourage the removal of percussion during the introduction phase.
  • a more powerful push, without striker risks first of all causing a buckling of the rod and then its final blocking in a partially sunken position in the mass. undergoing rapid hardening.
  • the object of the present invention is to propose a machine for drilling a tap hole of a shaft furnace, designed for implementing the method of the lost rod in a manner analogous to that carried out with the machine on demand.
  • Luxembourg patent LU-88,029 but which is distinguished by an overall length significantly reduced compared to the machine proposed in the Luxembourg patent application LU-88,029.
  • the present invention provides a machine for drilling a tap hole of the kind defined in the preamble and which is characterized by a powerful rotary motor installed at the rear of the carriage, by at least one chain. endless installed axially in the carriage between its front end and its rear end and driven by the rotary motor, by means for attaching the clamp to the endless chain so that it can be driven by the chain between the front end and the rear end of the mount and vice versa, and by means of control of the rotary motor to achieve during the introduction of the rod into the blocking mass by reversing the direction of rotation of the motor a movement of back and forth of the clamp between a position (B) at the front of the carriage and a position (A) which is located at a distance L from position (B), said distance L being less than the length of the rod.
  • a sliding clamp is attached to at least one endless chain installed axially in the mount.
  • This chain is driven by at least one powerful motor, the direction of rotation of which can be reversed.
  • the clamp After having threaded the piercing rod through the clamp and having coupled it with a sliding support at the rear of the carriage, the clamp is brought open by a rotation of the motor in a first direction at a certain distance L from l before the lookout, the clamp is closed and the rod is advanced using the clamp of said length L by rotating the motor in the same first direction, the clamp is then opened and the clamp is brought back again at the distance L from the front of the carriage by rotating the motor in the opposite direction, the clamp is closed and the rod is advanced a second length L.
  • said distance L is determined to avoid buckling of the rod during its introduction.
  • the extraction of the drilling rod is carried out as follows:
  • the clamp used is advantageously a bi-directional clamp of the kind described in the Luxembourg patent application LU-87 915 filed on April 3, 1991 and its addition certificate LU-88 020 filed on October 16, 1991.
  • the clamp may however also be a uni-directional clamp of the kind described in the Luxembourg patent LU-87 427, filed on January 16, 1989, but mounted in the opposite direction.
  • This pliers is then used only to push the rod into the tap hole.
  • the rear sliding support must be fitted with a second clamp intended for extracting the rod.
  • This is for example a clamp as described in the Luxembourg patent LU-87 546, filed on June 30, 1989.
  • the first clamp which is open, bears on the second clamp and pushes then said sliding support coupled to the end of the rod towards the rear, thus releasing the piercing rod from the tap hole.
  • a main advantage of the machine proposed by the present invention is its reduced length compared to a machine as described in the Luxembourg patent application LU-88 029. It will indeed be noted that the difference in length between the two machines corresponds approximately to the stroke of the reciprocating movement during the introduction of the rod, that is to say the length of the first hydraulic cylinder, installed behind a carriage supporting the clamp to produce said reciprocating movement come.
  • Another advantage is the reduced height of the machine proposed by the present invention. Indeed the chain can be easily integrated into the carriage, while the hydraulic cylinders proposed in the Luxembourg patent application No. 88 029 must for reasons of space be mounted on said carriage.
  • the machine proposed makes it possible to vary the stroke of the reciprocating movement used at the front of the carriage for the introduction of the rod.
  • this stroke can be freely chosen taking into account i) the buckling characteristics of the rods used and ii) the force necessary for the introduction of the rod.
  • the stroke can for example be increased if a rod with a larger diameter is used (eg a rod of 50 mm instead of a rod of 40 mm in diameter).
  • the stroke can be reduced if it is known that the blocking mass has hardened, for a reason or a other, more than usual. It will moreover be appreciated that an increase in the stroke of said reciprocating movement reduces the time necessary for the introduction of the rod.
  • the advantage of not choosing a stroke that is too small and of adapting the stroke to the characteristics of the rod and of the blocking mass are examples of the stroke that is too small and of adapting the stroke to the characteristics of the rod and of the blocking mass.
  • 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.
  • Reference 26 designates a piercing rod, also called a lost rod, for the method described above.
  • This rod 26 is carried, at the front of the machine, by a support 52 which is preferably a sliding support, for example of the type described in patent GB 2,216,827.
  • a fixed support of the type proposed by European patent application EP 0 064 644 this comprises two flaps mounted at the front of the mount 20 and which can pivot between an open position facilitating engagement and gripping the rod 26 with a view to extracting it and a position in which they define, between them, a passage opening and support for the rod 26.
  • the two flaps thus constitute a support and form at the same time a splash protection shield from the jet of the tap hole.
  • the rod 26 is supported by a second support which can follow the movement of the rod. It is for example a coupling 30 integral with a working member 32.
  • This working member is supported by a carriage sliding freely along the mount 20, for example using rollers 33 moving along the outer sides of the two beams 20a and 20b of the carriage 20 (see Figure 1a).
  • This working member 32 which conventionally comprises a drill and a striker, is however no longer used in the lost rod process. Its presence on the lookout is justified in order to be able to drill, if necessary, a tap hole with a conventional drill bit. It follows that if conventional drilling is not necessary, or that this drilling can be carried out in another way, the working member 32 can in principle be omitted. It is then replaced by a simple sliding press which follows the movement of the rod 26 thus ensuring its support at the rear.
  • Reference 34 is a clamp, for example a bi-directional clamp of the kind proposed by the Luxembourg patent application LU-87 915 or in its application for addition patent LU-88 020.
  • the opening and closing of the clamp are controlled by a pneumatic circuit (not shown).
  • a carriage 36 mounted for example on pads 37 guided in the rails 22, 24 of the mount 20, serves as a support for the clamp 34.
  • the carriage 36 supporting the clamp 34 is fixed to the endless chain and can consequently 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 lookout 20 and vice versa.
  • the rod 26 is loaded into the machine when it is in the garage position and when the clamp 34 occupies a position at the rear of the mount as shown in Figure 1.
  • the loading is carried out by threading the rod 26 through the clamp 34 open in the coupling-support 30 secured to the working member 32 and by coupling the support coupling 30 to the rear end of the rod 26.
  • the motor 42 is actuated by the control system 47 to rotate the chain in a first direction and thus advance the clamp 34 which is fully open in a position A (see Figure 2).
  • the clamp 34 not being activated, it can slide freely with respect to the rod 26 which is held in the coupling 30 of the working member 32.
  • the triggering of the reversal of the direction of rotation of the motor 42 and of the closing respectively opening of the clamp in positions A and B can for example be done using two limit switches, the first of which is associated with the stop 50 and the second is fixed on the carriage between the stop 50 and the stop 51.
  • This second switch is shown schematically in Figures 2 and 3 by the reference 53.
  • One solution which eliminates the second limit switch is to use the signal from a tachometer 53 installed on the motor 42 to determine in a calculation unit 55 (cf. FIG. 1a) at any time the exact position of the carriage 36 on the carriage and for controlling, through the control module 47, the reversal of the direction of rotation of the motor 42 when the carriage passes at a point determined in advance.
  • a calculation unit 55 it is preferable to use limit switch signals integrated in the stops 50 and 51 to automatically calibrate said calculation unit on each pass; that is to say to reset it and to recalculate the rectilinear displacement of the clamp 34 which corresponds to an entire revolution of the motor 42.
  • the mount 20 is moved to the tap hole.
  • the clamp 34 is moved by the motor 42 at the front of the carriage, against the stop 50.
  • the free end of the rod 26 engages through the clamp 34 which is open.
  • the pneumatic supply circuit of the clamp 34 then controls the closing of the clamp 34. Now the motor 42 can withdraw via the chain 44 the carriage 36 supporting the clamp 34 towards the rear and thus extract the rod from the tap hole.
  • This coupling 30 is then a clamp designed for the extraction of the rod, for example a clamp of the kind described in patent LU-87 546, and the clamp 34 may be a uni-directional clamp designed for the introduction of the rod 26, for example a clamp of the kind described in patent LU 87 427.
  • the clamp 34 remains open and the free end of the rod 26 crosses it to be gripped by the coupling / clamp 30. When it returns back the clamp 34 bears directly on the clamp 30 and the member of work in front of you. As a result, the working member must not transmit tensile force to the rod.
  • the carriage 36 can also be made integral supporting the clamp 34 and said member for work 32, for example by means of two hooks 60 and 60 'situated on each side of the working tool and capable of engaging automatically or manually with tenons 61 and 61' situated laterally on said carriage 36.
  • the working member 32 does not need its own drive system on the carriage 20 to carry out, for example, drilling with a conventional drill 27 (cf. FIGS. 4 and 4a).
  • the present invention provides a machine which, by its multiple advantages over the state of the art, certainly brings substantial technical progress with regard to the execution of said method of the lost rod and contributes in particular to a better environmental protection by almost silent operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Earth Drilling (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Discharge Heating (AREA)
  • Drilling And Boring (AREA)
EP92121659A 1992-01-24 1992-12-19 Machine de perçage d'un trou de coulée d'un four à cuve Expired - Lifetime EP0552476B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU88058A LU88058A1 (fr) 1992-01-24 1992-01-24 Machine de percage d'un trou de coulee d'un four a cuve
LU88058 1992-01-24

Publications (3)

Publication Number Publication Date
EP0552476A2 EP0552476A2 (fr) 1993-07-28
EP0552476A3 EP0552476A3 (en) 1993-12-29
EP0552476B1 true EP0552476B1 (fr) 1996-10-30

Family

ID=19731336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121659A Expired - Lifetime EP0552476B1 (fr) 1992-01-24 1992-12-19 Machine de perçage d'un trou de coulée d'un four à cuve

Country Status (16)

Country Link
US (1) US5338013A (enrdf_load_stackoverflow)
EP (1) EP0552476B1 (enrdf_load_stackoverflow)
JP (1) JPH05263113A (enrdf_load_stackoverflow)
CN (1) CN1030471C (enrdf_load_stackoverflow)
AT (1) ATE144824T1 (enrdf_load_stackoverflow)
BE (1) BE1006264A3 (enrdf_load_stackoverflow)
BR (1) BR9300166A (enrdf_load_stackoverflow)
CA (1) CA2087491A1 (enrdf_load_stackoverflow)
CZ (1) CZ282188B6 (enrdf_load_stackoverflow)
DE (1) DE4301323C2 (enrdf_load_stackoverflow)
ES (1) ES2093762T3 (enrdf_load_stackoverflow)
FR (1) FR2687689B1 (enrdf_load_stackoverflow)
GB (1) GB2263537B (enrdf_load_stackoverflow)
LU (1) LU88058A1 (enrdf_load_stackoverflow)
RU (1) RU2087539C1 (enrdf_load_stackoverflow)
SK (1) SK2193A3 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU88059A1 (fr) * 1992-01-27 1993-08-17 Paul Wurth S.A. Machine de percage d'un trou de coulee d'un four a cuve
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
KR100743022B1 (ko) * 2001-05-31 2007-07-26 주식회사 포스코 스테이브 고로의 노체 압력공 실시간 자동관통장치
KR100817164B1 (ko) * 2001-11-16 2008-03-27 주식회사 포스코 출선구 경동각 측정 면보수 굴착장치
US8452450B2 (en) * 2008-04-24 2013-05-28 Evolution Robotics, Inc. Application of localization, positioning and navigation systems for robotic enabled mobile products
EP2415881B1 (de) * 2010-08-04 2013-12-25 TMT Tapping-Measuring-Technology GmbH Haltevorrichtung für eine Bohrstange einer Stichlochbohrmaschine sowie Verfahren zum Entfernen einer Bohrstange
CN102517412B (zh) * 2011-12-22 2014-04-09 宜昌市燕狮科技开发有限责任公司 立柱式重型开铁口机
CN109593910B (zh) * 2019-01-03 2023-09-15 福建三钢闽光股份有限公司 出钢口安装套具及出钢口安装方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464303A1 (fr) * 1979-09-05 1981-03-06 Atlas Copco France Dispositif pour enfoncer et retirer, par percussion a l'aide d'un seul marteau et avec accrochage automatique, une barre, par exemple une barre en contact avec la fonte et faisant saillie a l'exterieur d'un haut fourneau
LU83336A1 (fr) * 1981-05-05 1983-03-24 Wurth Paul Sa Dispositif de centrage et de guidage d'une tige de percage du trou de coulee d'un four a cuve et perceuse pourvue d'un tel dispositif
LU84855A1 (fr) * 1983-06-08 1985-03-29 Wurth Paul Sa Machine de percage d'un trou de coulee de four a cuve
DE3339127A1 (de) * 1983-10-28 1985-05-09 Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen Greifvorrichtung fuer in das stichloch von metallurgischen oefen eintreibbare und aus diesem herausziehbare stangen, insbesondere abstichstangen
LU86963A1 (fr) * 1987-08-04 1989-03-08 Wurth Paul Sa Machine de percage d'un trou de coulee de four a cuve
LU87190A1 (fr) * 1988-04-06 1989-11-14 Wurth Paul Sa Machine de percage de trous de coulee d'un four a cuve
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
LU87546A1 (fr) * 1989-06-30 1991-02-18 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
US5069430A (en) * 1990-10-26 1991-12-03 Woodings Industrial Corporation Blast furnace tap hole drill with centralizing drill rod support
LU87915A1 (fr) * 1991-04-03 1992-03-03 Wurth Paul Sa Procede d'introduction d'une tige de percage dans le trou de coulee d'un four a cuve,machine de percage et pince prevue pour une telle machine
LU88020A1 (fr) * 1991-10-16 1993-05-17 Wurth Paul Sa Procédé d'introduction d'un tige de perçage dans le trou de coulée d'un four à cuve, machine de perçage et pince grévue pour une telle machine
LU88029A1 (en) * 1991-10-31 1993-05-17 Wurth Paul Sa Machine for piercing the tap-hole of shaft furnace - using sacrificial drill bar without any percussion hammer
DE4131982C2 (de) * 1991-09-26 1995-04-06 Dango & Dienenthal Maschbau Stichlochbohrmaschine für metallurgische Behälter, insbesondere Hochöfen

Also Published As

Publication number Publication date
LU88058A1 (fr) 1993-08-17
CN1030471C (zh) 1995-12-06
BE1006264A3 (fr) 1994-07-05
BR9300166A (pt) 1993-07-27
JPH05263113A (ja) 1993-10-12
ES2093762T3 (es) 1997-01-01
FR2687689B1 (fr) 1994-10-07
SK2193A3 (en) 1993-10-06
GB2263537A (en) 1993-07-28
EP0552476A3 (en) 1993-12-29
ATE144824T1 (de) 1996-11-15
EP0552476A2 (fr) 1993-07-28
RU2087539C1 (ru) 1997-08-20
DE4301323C2 (de) 2001-10-04
DE4301323A1 (enrdf_load_stackoverflow) 1993-07-29
CZ282188B6 (cs) 1997-05-14
CA2087491A1 (fr) 1993-07-25
US5338013A (en) 1994-08-16
GB2263537B (en) 1996-04-24
GB9300413D0 (en) 1993-03-03
CZ7193A3 (en) 1993-08-11
FR2687689A1 (fr) 1993-08-27
CN1074942A (zh) 1993-08-04

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