EP0552476A2 - Schachtofen-Abstichlochbohrer - Google Patents
Schachtofen-Abstichlochbohrer Download PDFInfo
- Publication number
- EP0552476A2 EP0552476A2 EP92121659A EP92121659A EP0552476A2 EP 0552476 A2 EP0552476 A2 EP 0552476A2 EP 92121659 A EP92121659 A EP 92121659A EP 92121659 A EP92121659 A EP 92121659A EP 0552476 A2 EP0552476 A2 EP 0552476A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamp
- rod
- carriage
- machine according
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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 in a shaft furnace, designed for implementing the lost rod method in which, after having closed the tap hole with a plugging mass, presses a metal rod into it, before it has fully hardened, and extracts it at the desired time for the opening of 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 part 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 partially remedies 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, nevertheless, always 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 position partially pressed into the mass. undergoing rapid hardening.
- the object of the present invention is to provide 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, when the rod is introduced 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 to a sliding support at the rear of the mount, 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: After having secured the end of the rod with the clamp located at the front of the carriage, it is removed by the chain, thus releasing the piercing rod in a continuous movement of the tap hole.
- 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 can 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 proposed machine 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 beam 20a we see at the front of the carriage that the beam 20a, the beam 20b is not shown to show more details.
- 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, 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 for the extraction thereof and a position in which they define, between them, a passage opening and support for the rod 26.
- the two flaps in this way constitute a support and form at the same time a splash protection shield from the jet from the tap hole.
- the rod 26 is supported by a second support which can follow the displacement 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 patent application addition 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 carriage 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 carriage 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). Since the clamp 34 is not activated, it can slide freely relative 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 diagrammatically 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 calculating unit 55 it is preferable to use limit switch signals integrated in the stops 50 and 51 to automatically calibrate said calculating unit at 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 motor 42 used to drive the chain 44 is a hydraulic motor, it may well be also understood to carry out flow measurements of the hydraulic fluid supplying the engine to determine the exact moment when the direction of rotation of the engine must be reversed, and when the clamp 34 must be open, respectively closed.
- 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 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 provides 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)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Discharge Heating (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Drilling And Boring (AREA)
- Manufacture Of Motors, Generators (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88058 | 1992-01-24 | ||
LU88058A LU88058A1 (fr) | 1992-01-24 | 1992-01-24 | Machine de percage d'un trou de coulee d'un four a cuve |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0552476A2 true EP0552476A2 (de) | 1993-07-28 |
EP0552476A3 EP0552476A3 (en) | 1993-12-29 |
EP0552476B1 EP0552476B1 (de) | 1996-10-30 |
Family
ID=19731336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92121659A Expired - Lifetime EP0552476B1 (de) | 1992-01-24 | 1992-12-19 | Schachtofen-Abstichlochbohrer |
Country Status (16)
Country | Link |
---|---|
US (1) | US5338013A (de) |
EP (1) | EP0552476B1 (de) |
JP (1) | JPH05263113A (de) |
CN (1) | CN1030471C (de) |
AT (1) | ATE144824T1 (de) |
BE (1) | BE1006264A3 (de) |
BR (1) | BR9300166A (de) |
CA (1) | CA2087491A1 (de) |
CZ (1) | CZ282188B6 (de) |
DE (1) | DE4301323C2 (de) |
ES (1) | ES2093762T3 (de) |
FR (1) | FR2687689B1 (de) |
GB (1) | GB2263537B (de) |
LU (1) | LU88058A1 (de) |
RU (1) | RU2087539C1 (de) |
SK (1) | SK2193A3 (de) |
Families Citing this family (8)
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 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025423A1 (de) * | 1979-09-05 | 1981-03-18 | Atlas Copco France S.A. | Stichlochbohrapparat für Hochöfen |
EP0128432A2 (de) * | 1983-06-08 | 1984-12-19 | Paul Wurth S.A. | Stichlochbohrmaschine für Schachtöfen |
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 |
GB2207741A (en) * | 1987-08-04 | 1989-02-08 | Wurth Paul Sa | Machine for piercing a shaft furnace taphole |
EP0379018A2 (de) * | 1989-01-16 | 1990-07-25 | Paul Wurth S.A. | Verfahren und Vorrichtung zum Öffnen des Abstichloches eines Schlachtofens |
US5069430A (en) * | 1990-10-26 | 1991-12-03 | Woodings Industrial Corporation | Blast furnace tap hole drill with centralizing drill rod support |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
LU87190A1 (fr) * | 1988-04-06 | 1989-11-14 | Wurth Paul Sa | Machine de percage de trous 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 |
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 |
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 |
LU88029A1 (de) * | 1991-10-31 | 1993-05-17 | Wurth Paul Sa | Machine de perçage d'un trou de coulée d'un four à cuve |
DE4131982C2 (de) * | 1991-09-26 | 1995-04-06 | Dango & Dienenthal Maschbau | Stichlochbohrmaschine für metallurgische Behälter, insbesondere Hochöfen |
-
1992
- 1992-01-24 LU LU88058A patent/LU88058A1/fr unknown
- 1992-12-19 ES ES92121659T patent/ES2093762T3/es not_active Expired - Lifetime
- 1992-12-19 EP EP92121659A patent/EP0552476B1/de not_active Expired - Lifetime
- 1992-12-19 AT AT92121659T patent/ATE144824T1/de not_active IP Right Cessation
-
1993
- 1993-01-11 GB GB9300413A patent/GB2263537B/en not_active Expired - Lifetime
- 1993-01-15 FR FR9300335A patent/FR2687689B1/fr not_active Expired - Fee Related
- 1993-01-18 CA CA002087491A patent/CA2087491A1/fr not_active Abandoned
- 1993-01-20 DE DE4301323A patent/DE4301323C2/de not_active Expired - Lifetime
- 1993-01-21 BR BR9300166A patent/BR9300166A/pt not_active IP Right Cessation
- 1993-01-21 CN CN93100776.3A patent/CN1030471C/zh not_active Expired - Lifetime
- 1993-01-21 BE BE9300060A patent/BE1006264A3/fr not_active IP Right Cessation
- 1993-01-21 JP JP5027636A patent/JPH05263113A/ja active Pending
- 1993-01-22 CZ CZ9371A patent/CZ282188B6/cs not_active IP Right Cessation
- 1993-01-22 SK SK2193A patent/SK2193A3/sk unknown
- 1993-01-22 RU RU9393004436A patent/RU2087539C1/ru active
- 1993-01-22 US US08/008,128 patent/US5338013A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025423A1 (de) * | 1979-09-05 | 1981-03-18 | Atlas Copco France S.A. | Stichlochbohrapparat für Hochöfen |
EP0128432A2 (de) * | 1983-06-08 | 1984-12-19 | Paul Wurth S.A. | Stichlochbohrmaschine für Schachtöfen |
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 |
GB2207741A (en) * | 1987-08-04 | 1989-02-08 | Wurth Paul Sa | Machine for piercing a shaft furnace taphole |
EP0379018A2 (de) * | 1989-01-16 | 1990-07-25 | Paul Wurth S.A. | Verfahren und Vorrichtung zum Öffnen des Abstichloches eines Schlachtofens |
US5069430A (en) * | 1990-10-26 | 1991-12-03 | Woodings Industrial Corporation | Blast furnace tap hole drill with centralizing drill rod support |
Also Published As
Publication number | Publication date |
---|---|
CA2087491A1 (fr) | 1993-07-25 |
ES2093762T3 (es) | 1997-01-01 |
JPH05263113A (ja) | 1993-10-12 |
FR2687689B1 (fr) | 1994-10-07 |
DE4301323A1 (de) | 1993-07-29 |
DE4301323C2 (de) | 2001-10-04 |
RU2087539C1 (ru) | 1997-08-20 |
BE1006264A3 (fr) | 1994-07-05 |
EP0552476A3 (en) | 1993-12-29 |
GB9300413D0 (en) | 1993-03-03 |
GB2263537A (en) | 1993-07-28 |
CN1074942A (zh) | 1993-08-04 |
CZ7193A3 (en) | 1993-08-11 |
US5338013A (en) | 1994-08-16 |
ATE144824T1 (de) | 1996-11-15 |
FR2687689A1 (fr) | 1993-08-27 |
GB2263537B (en) | 1996-04-24 |
BR9300166A (pt) | 1993-07-27 |
CZ282188B6 (cs) | 1997-05-14 |
CN1030471C (zh) | 1995-12-06 |
LU88058A1 (fr) | 1993-08-17 |
SK2193A3 (en) | 1993-10-06 |
EP0552476B1 (de) | 1996-10-30 |
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