EP0574729A1 - Shaft furnace taphole piercing machine - Google Patents

Shaft furnace taphole piercing machine Download PDF

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Publication number
EP0574729A1
EP0574729A1 EP93108260A EP93108260A EP0574729A1 EP 0574729 A1 EP0574729 A1 EP 0574729A1 EP 93108260 A EP93108260 A EP 93108260A EP 93108260 A EP93108260 A EP 93108260A EP 0574729 A1 EP0574729 A1 EP 0574729A1
Authority
EP
European Patent Office
Prior art keywords
carriage
rod
machine according
support
finger
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
Application number
EP93108260A
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German (de)
French (fr)
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EP0574729B1 (en
Inventor
Victor Kremer
Emile Lonardi
Guy Thillen
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
Priority claimed from LU88135A external-priority patent/LU88135A1/en
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0574729A1 publication Critical patent/EP0574729A1/en
Application granted granted Critical
Publication of EP0574729B1 publication Critical patent/EP0574729B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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 in a wall of a shaft furnace by a method in which, after having closed the tap hole with a plugging mass, it is pressed into it before its complete hardening, a rod and one extracts it, at the desired time, for the opening of the tap hole.
  • a machine comprises an adjustable carriage in front of the wall of the shaft furnace in a working position in the extension of the axis of the taphole, a first carriage movable along this carriage, a drive means for said first carriage driving this carriage along this lookout.
  • the object of the present invention is to provide a machine for drilling a tap hole of a shaft furnace, which makes it possible to push said rod into the semi-hardened obturating mass by exerting a powerful push on the free end of the rod, without causing it to buckle, and which does not have the drawbacks mentioned above.
  • the present invention provides a machine for drilling a tap hole of the kind defined in the preamble, which is characterized by guide means for defining a guide channel for the rod, said guide means defining at least one longitudinal opening giving access to the interior of the guide channel perpendicular to the axis thereof; by means for supporting said guide means on the carriage, said support means being designed so that the longitudinal axis of the guide channel is coaxial with the axis of the tap hole when the carriage is in said position working in front of the wall of the shaft furnace to push said metal rod into the tap hole, and by a finger integral with said first carriage, said finger being dimensioned to penetrate through said longitudinal opening inside said guide channel and to be able to exert an axial thrust on one end of the metal rod when the first carriage advances in tap hole direction.
  • the piercing rod slides in the guide channel into which can penetrate the finger which is integral with the carriage driven along the carriage by the powerful drive means.
  • This guidance of the piercing rod in a channel avoids any risk of buckling, when an appreciable axial thrust is applied to the end of the rod by means of the finger penetrating the channel in order to drive its opposite end into the mass. plugging, with which the tap hole was previously sealed.
  • the guide means must be dimensioned so as not to allow a radial escape of the rod of said channel.
  • said guide channel may have axial and radial discontinuities, as long as a radial escape of the metal rod subjected to the axial thrust force is not to be feared.
  • the main advantage of this machine is to be able to safely introduce the piercing rod into the plugging mass by a force exerted on its free end without having to use a noisy striker, imposing significant vibrations on the equipment and the machine.
  • the present guide channel must not be removed as the advancement of said finger, integral with the carriage movable along the carriage. It will also be appreciated that the only element which must be movable according to the present invention is the carriage which supports the finger penetrating inside the channel. Indeed, the guide means defining the guide channel of the metal rod in no way hinder the advancement of the finger secured to the movable carriage and can therefore remain in place during the entire operation of introducing the rod.
  • Said guide means could however still be troublesome during the operation of extracting the rod with a conventional pliers, or when it is desired to work with a conventional drilling machine which can be moved along the carriage to drill the taphole with a drill. This is why it is advantageous to support said support means by means of arms articulated on the carriage. This solution makes it possible to pivot said guide means laterally, freeing up, if necessary, the template required along the carriage to extract the rod using conventional pliers, or else to work with a drill sliding along on the lookout.
  • This pivoting or folding down of said guide means in a lateral position with respect to the carriage has the advantage of removing said guide means from the most dangerous zone opposite the tap hole, which is naturally the one which is located directly in the extension of the jet axis when opening the tap hole.
  • the guide channel of the rod is defined by a tube, having a diameter slightly larger than that of the rod and being provided with at least one longitudinal slot which crosses along a generatrix radially its wall over its entire length. It is a particularly simple and inexpensive embodiment of said guide means.
  • the longitudinal slot allows the penetration of said finger inside the tube so that it can exert an axial thrust on the end of the rod during the advancement of the carriage along the carriage in the direction of the tap hole.
  • the loading of the metal rod into the guide channel can naturally be done axially by pushing the rod through one end of the channel.
  • the introduction of the rod is however facilitated when the guide means can be opened longitudinally to freely place the rod in its guide channel.
  • said guide means may for example consist of longitudinal parts which are juxtaposed to jointly define said guide channel.
  • the tube serving as guide means is split longitudinally into a first and second tube segment. In this way the tube can be opened longitudinally to put the metal rod in it and closed to form said guide channel.
  • the first tube segment is then advantageously mounted on first articulated arms along a first lateral side of the mount and the second tube segment is mounted on second articulated arms along the opposite lateral side of the mount.
  • This arrangement makes it possible to pivot the first tube segment and the second tube segment laterally in opposite directions to open said channel. In the open position of the channel, it is then easy to place the metal rod in one of the two tube segments, then reconstitute the guide channel by pivoting the two tube segments in their initial position. It will be noted that this arrangement also makes it possible to release a certain size between the two tube segments.
  • This template may be necessary for the passage of a clamp or a drill which are movable on said carriage.
  • the pivotable support means are advantageously actuated by one or more jacks. This or these jacks then maintain the guide channel in the axis of the taphole during the sinking operation of the rod and allow the guide means to be folded down when the latter are not used. They can be mounted in a protected area from the lookout and can be effectively protected against splashing.
  • this drive means comprises an endless chain which is driven by a hydraulic motor. It is a particularly simple training means which can however deliver appreciable training efforts. In addition, the chain is self-cleaning and does not require maintenance.
  • the drilling machine is advantageously provided with a working member comprising a drill and possibly a powerful striker.
  • a working member comprising a drill and possibly a powerful striker.
  • This can be useful for reforming or moving the tap hole, or for working with a conventional drill when the lost rod method cannot be used for one reason or another.
  • it is advantageous to provide means for coupling said working member to the drive means of the first carriage. This avoids having to install a second drive system on the machine.
  • the present machine in this case comprises means for firmly coupling the free end of the rod to said drive means.
  • the latter withdraws the rod from the tap hole by a forceful recoil movement, that is to say without producing vibrations and in a completely silent manner.
  • the coupling means used for the extraction of the rod may for example comprise a hook which is mounted on said first carriage. This hook then engages through said longitudinal opening of the guide channel to bear. behind a machined shoulder in the free end of the rod.
  • the present machine comprises in a preferred embodiment an intermediate support sliding on and movable along the carriage, which makes it possible to support a rod or a drill in the absence of the guide channel.
  • a screen mounted at the front of the mount effectively protects the machine against splashes from the jet coming out of the tap hole.
  • FIGS. 1 and 2 show a carriage 10 of a drilling machine.
  • This mount 10 is for example supported at the end of a support arm (not shown) via a central piece 12 secured to the mount 10.
  • This support arm can pivot in a conventional and known manner around a console (not shown ) to move the carriage between a garage position and a working position and vice versa. In this working position the carriage 10 can be oriented in front of the wall of the furnace so that its longitudinal axis is located in the extension of the axis of the tap hole.
  • the carriage can for example be formed from several beams or metal sections welded together to form a sort of box.
  • This box 14 has two side walls 16, 18 connected by an upper plate 20 and defining a longitudinal opening 22 downwards.
  • In the box 14 is mounted at least one endless chain 24.
  • This endless chain 24 is stretched between a driven toothed wheel 26 mounted at the front of the carriage 10 and a driving toothed wheel 28 mounted at the rear of the 'carriage 10.
  • the driving wheel 28 is driven by at least one motor 30 fixed on the carriage 10. It is preferably a hydraulic motor whose direction of rotation can be reversed by a suitable control system.
  • first carriage 32 which is driven by said endless chain 24.
  • This first carriage 32 is shown in more detail in FIG. 4. It has on each side a pair of rollers 34, 36 which are guided respectively in a first rail 38 and in a second rail 40.
  • These rails 38, 40 which have a U-shaped section (cf. FIG. 5), form an integral part of the side walls 16, 18 of the box 14.
  • a finger 42 comprising a flat trunk 44 which extends the carriage 32 downwards through said longitudinal opening 22 in the box 14 forming the carriage 10.
  • This finger 42 is preferably mounted in the carriage 32 to using a cylindrical axis 46, housed in bores 48, 50 of the carriage 32 and passing through a bore 52 of the trunk 44, so as to be able to pivot in the vertical plane passing through the axis of movement of the first carriage 32 .
  • the finger 42 is shown in a position in which it is supported with its lower end on a piercing rod 54. The latter has been put in place in the piercing machine to be pressed into a plugging mass which has been previously injected into the taphole.
  • the lower end of the finger 42 which bears on the rod 54 has the shape of a cylindrical bead 56 which extends in the extension of the axis of the rod 54.
  • the finger 42 has an extension 58 of its trunk 44 on the other side of the cylindrical axis 46. This extension 58 bears on a bearing surface 60 of the first carriage 32 when the cylindrical bead 56 of the finger exerts an axial thrust on the end of the rod 54.
  • the finger 42 can therefore only pivot in the clockwise direction, that is to say in the direction of the arrow indicated by the reference 62.
  • the rod is guided in a channel 64 formed by a cylindrical tube 66.
  • This tube 66 which has substantially the same length as the rod and an inner diameter slightly larger than the diameter of the rod, preferably consists of two tube segments 68, 70 which are almost symmetrical with respect to a plane passing through the longitudinal axis of the tube.
  • Each of the two segments 68, 70 is supported by several bent arms 72, 72 '.
  • the bent arms 72 supporting the first tube segment 68 are axially spaced and fixed on a tube 74 running along the first side wall 16 of the box 14 forming the mount (cf. FIGS. 1 and 3).
  • This tube 74 is mounted, for example in the middle and at its two ends, by means of cylindrical articulations 76 on this first side wall 16, so that it can pivot around its longitudinal axis.
  • the bent arms 74 'supporting the second tube segment 70 are mounted identically along the opposite side wall 18 of the carriage 10.
  • the elements involved in the mounting of the second tube segment 70 are identified by the same numbers reference that the mounting elements of the first tube segment 68, however provided with an accent.
  • the tube 66 formed by juxtaposition of the two tube segments 68, 70 is provided with a longitudinal slot 78 passing through a generatrix radially its wall over its entire length.
  • this slot 78 is facing the longitudinal opening 22 in the mount 10.
  • the finger can penetrate with its flat trunk 44 through the slot 78 inside the tube 66, in which the bead 56 can slide freely when the first carriage 32 is moved along the carriage 10.
  • the latter advantageously has a constriction 80.
  • This constriction 80 allows to limit the width of the slot 78, so as to prevent the rod 54 from being able to get stuck in the slot 78 when the finger 42 exerts an axial thrust on the end of the latter.
  • the rod 54 When the rod 54 is inserted into the plugging mass, the latter is thus guided over its entire length, with the exception of the piece extending between the wall of the shaft furnace and the front of the carriage 10.
  • the length of this unguided piece is much less than the critical length for which buckling is likely to occur.
  • axial interruptions of said guide channel are not bothersome, as long as the forced insertion of the rod 56 into the blocking mass can be carried out safely without having to fear buckling at the places where the metal rod is not guided.
  • the teaching of the present invention does not depart from the definition of said guide channel 64 by several coaxial sleeves which are axially spaced apart by a distance less than the critical length for which buckling is likely to occur between two successive guide sleeves.
  • FIG 3 the two tube segments 68, 70, defining the channel 64 when they are juxtaposed against each other, are shown spaced from one another.
  • This arrangement is obtained by pivoting the tube 74, supporting via the bent arms 72 the first tube segment 68, and by pivoting the tube 74 ', supporting via the bent arms 72' the second tube segment 70 , around their respective axis and in opposite directions.
  • This pivoting is advantageously carried out by means of one or more jacks 82, 84.
  • each of the tubes 74, 74 ′ is provided with its own jack 82, 84.
  • These two jacks 82, 84 are arranged laterally of the carriage, halfway along the tubes 74, 74 'so as to be protected from splashes of cast iron projected outside the tap hole when it is opened. They can also be provided with a protective cage (not shown) which in no way interferes with this position of the carriage 10.
  • Each of the two jacks 82, 84 is articulated according to the rules of the art with one of its ends on a support 86 secured to the carriage 10, and with the other end on a lever arm 88, 88 'secured respectively to the first tube 74 or the second tube 74.
  • lever arm 88, 88' is an extension of a bent arm 72, 72 '. It will be noted that an extension of the two cylinders 82, 84 causes the two tube segments 68, 70 to come together until they meet at the level of the longitudinal median plane of the carriage 10. In this position, shown in FIG. 5 , the two cylinders push the two tube segments 68, 70 firmly against each other to define guide channel 64.
  • a retraction of the two cylinders 82, 84 causes a separation of the two tube segments 68, 70 (cf. FIG. 3) and the longitudinal opening of the channel 64 so that the rod 54 can easily be placed in one of the two segments of tube.
  • This, in Figure 3 it is the straight segment 70, is then advantageously provided with claws 90 to support the rod 54.
  • These claws 90 are spaced axially, as shown in Figures 1 and 2, and penetrate during of the assembly of the two tube segments 68, 70 in corresponding notches 92 made in the other tube segment 68.
  • the two tube segments 68, 70 are parts that can be produced at low cost, from steel tubes cut longitudinally. These tube segments are preferably detachably fixed on the bent arms 72, 72 ', for example using lugs 94 welded on the tube segments and screwed on the bent arms 72, 72'. Such a tab 94 is represented at the level of the left arm 72 of FIG. 3. This assembly makes it possible to easily replace the tube segments 72, 72 ′ when they are accidentally damaged at the front of the carriage 10 by the outgoing cast iron. of the tap hole.
  • a working member 100 usually comprises a drill and a striker. Its presence is justified to be able to drill, if necessary, a tap hole with a conventional drill. This can for example be the case when one wants to reform or move the tap hole, or when one cannot use the lost rod process for one reason or another.
  • the working member 100 is provided with a mandrel 102 which can be coupled to a drill. To this end, the finger 42 is pivoted upwards, that is to say in direction of arrow 62 in Figure 4 to allow the introduction of the drill into the mandrel.
  • the tube segments 68, 70 are separated laterally to free the template necessary for the passage of the working member 100.
  • the working member 100 is mounted on a second carriage 104 which slides using two pairs of rollers 106, 108 in a pair of rails 110, 112. These are fixed in the box 14, parallel below the rails 38, 40 supporting the first carriage 32. They have U-shaped sections and are arranged so as to guide the second carriage vertically and laterally.
  • the working member 100 is advantageously driven by the same drive means as the first carriage 32.
  • the second carriage 104 can for example be coupled by hooks (not shown) or any other means equivalent to the first carriage 32.
  • the working member 100 may also be used for the force extraction of the rod, when it is provided with coupling means 102 suitable for coupling to the end of the rod 54 leaving the tap hole.
  • the first carriage 32 is then provided with a member which transmits the tensile force directly to said coupling means, so as to prevent the transmission of the tensile force from taking place through the mechanics of the working organ.
  • This member can for example be a fork 105 integral with said extension 58 of the finger 42 articulated on the first carriage 32 (cf. FIG. 4).
  • the fork 105 then bears on a shoulder 106 of the coupling 102 mounted on the working member 100 to exert on the latter an axial thrust in the direction of extraction of the rod 54.
  • the articulated finger 42 abuts against a bearing surface 108 of the first carriage 32.
  • the carriage 104 is simply pushed in front of the first carriage 32.
  • the working member 100 must not transmit no tensile force and serves only as a sliding support for the coupling means 102.
  • FIG. 8 An interesting variant for driving the working member 100 is shown in Figures 8 and 9.
  • Figure 8 we see that the fork 105, secured to the finger 42 articulated on the first carriage 32, is blocked by a rod transverse 132 in a vertical position between the shoulder 106 at the rear of the coupling 102 and a second shoulder 130 at the front of the coupling 102.
  • the fork 105 is supported on the front shoulder 130 for drive the working member 100, when the first carriage 32 is moved towards the front of the carriage, in the same direction, and on the rear shoulder 106 to push the working member 100 in front of you, when the first carriage is moved to the rear of the carriage.
  • the coupling 102 comprises a cage 134 secured to one end of the chassis of the working member 100.
  • this cage can rotate freely a rotary member 136 secured to a drive spindle 138 of the working member 100.
  • This cage 134 defines at the front, that is to say on the side of its free end, said shoulder 130, on which the fork 105 is supported during the drive of the working member 100 towards the front of the carriage.
  • the shoulder 106, on which the fork 105 is supported during the extraction of the rod, is in turn machined in the rotary member 136, so as to release the spindle 138 from any tensile force when the release of the drilling rod 54 of the tap hole.
  • the means shown in Figure 8 to secure the piercing rod 54 of the coupling 102 include a male thread 140, machined in the free end of the piercing rod 54, and a corresponding female thread, machined in the front end of the rotary member 136.
  • FIGS. 10, 11, 12 and 13 show a variant using for the extraction of the piercing rod 54 a jaw clamp 150.
  • This jaw clamp 150 is integrated in the first carriage 32, on which the finger 42 is articulated. It will be noted that the jaw clamp 150 must be provided with a passage channel 152 for the piercing rod 54, which is dimensioned so as to allow the passage of said guide means during the operation of introducing the rod of drilling 54 using finger 42 (see Figures 10 and 11). In this way, the jaw clamp 150 can remain in place on the carriage 32 during the operation of introducing the piercing rod 54 into the plugging mass.
  • the guide means 68, 70 are of course spaced from the path of the clamp, and the finger 42 is folded up (see Figures 12 and 13).
  • the rod can now be gripped firmly by pairs of jaws 154 disposed along said passage channel 152.
  • Figures 14, 15, 16 and 17 show a variant using for the extraction of the piercing rod 54 a clamp 160 formed of two hooks 162 and 164 juxtaposed and articulated both about a transverse axis 166 in said first carriage 32.
  • the hook 162 has at its lower end a bead 56 ', equivalent to said cylindrical bead 56 of the finger 42. This bead 56 'can penetrate into the guide channel 64 to bear on the free end of the piercing rod 54 in order to push the latter into the blocking mass.
  • the hook 162 consequently fulfills, during the operation of introducing the piercing rod 54 into the plugging mass, the role of the finger 42 shown in FIGS. 4 and 5.
  • FIG. 16 it can also be seen that , for the rod insertion operation, the two hooks 162 and 164 are locked by a removable stop 168 in a folded position. In this position, said cylindrical bead 56 ′ is in alignment with the guide channel 64, and the hook 164 is completely folded down in the first carriage 32.
  • the removable stop 168 constitutes at the same time a counter-support for the hook 162, when the cylindrical bead 56 'of the latter bears on the end of the piercing rod 54 to exert an axial thrust on the latter.
  • the means defining the guide channel 64 are folded down (see Figure 14) and the removable stop 168 is removed, so that the hooks 162 and 164 can be engaged behind a shoulder 170 integral of the free end of the piercing rod 54. It will be noted that the hook 164 is locked in this position by a removable transverse rod 172.
  • a pneumatic cylinder 174 integral with the first carriage 32 pushes the hook 162 against the piercing rod 54 and thus closes the clamp 160 behind the shoulder 170.
  • the second hook 164 is pushed against the transverse rod 172 which consequently serves as a counter support or reaction element to the clamp 160.
  • the ends of the two hooks 162 and 164 advantageously have the shape of annular segments circumferentially matching the piercing rod 54, so as to increase the contact surface between the clamp 160 and the piercing rod 54, and thus reduce the risk of the shoulder 170 being torn off when the piercing rod 54 is released from the tap hole.
  • the carriage 10 advantageously comprises an intermediate support 110.
  • This intermediate support consists of a hook 112 mounted on a third carriage 114 sliding with the aid of two pairs of rollers 116, 118 in the same rails 110, 112 as the working tool 100 (cf. Figures 6 and 7).
  • This third carriage 114 is preferably linked to the first carriage 32 by means of two rods 120, 122 which are fixed to the third carriage 114 and slide in guide bushings 124, 126 of the first carriage 32 and of the working member
  • the purpose of these rods 120, 122 is to automatically remove the intermediate support 110 from the front of the carriage to the middle of the carriage, that is to say to put it in safety before the drilling rod 54 is not completely removed from the tap hole.
  • This intermediate support 110 is used to support the piercing rod removed from the tap hole. This same support 110 can however also be useful for mounting / dismounting a drill bit on the working member.
  • the hook 112 of the intermediate support 110 is advantageously folded up so as not to hinder the positioning of said guide means 68, 70.
  • the hook 112 is mounted on the carriage 114 by means of a cylindrical articulation 128 and can be immobilized in the folded position by a pin 129, respectively by equivalent means.
  • a fixed support 130 at the front of the mount is preferably a screen support of the type proposed in European patent application EP 0 064 644.
  • This comprises two flaps mounted at the front of the mount 10, that is to say in front of the tap hole when the carriage is in the operative position. These flaps can pivot between an open position, facilitating the gripping of the piercing rod 54 with a view to releasing the latter from the taphole and a closed position, in which they define a support for the rod 54 and a protective shield. against splashing from the jet coming out of the tap hole when the latter is opened.
  • the drilling machine according to the present invention can also be produced with other drive means than a hydraulic motor driving an endless chain.
  • Another possible drive system is a screw-nut system, in which the nut is fixed in rotation and the screw which extends along the mounting, is fixed in translation. A rotation of the screw consequently causes the translation of the nut.
  • This nut can directly support the finger 42 or else drive the first carriage 32 supporting the finger 42.
  • the finger 42 does not necessarily have to be mounted on a carriage 32 which slides in rails in the box 14 forming the mount 10.
  • Any guide means making it possible to keep the finger 42 in the axis of the rod when moved along the carriage is to be considered in the sense of the present invention as a means perfectly equivalent to the carriage / rail system.
  • the finger 42 is directly mounted on the drive means itself.
  • the term "carriage" designates, therefore, most generally a machine part which supports and displaces another machine element.

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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)
  • Earth Drilling (AREA)
  • Punching Or Piercing (AREA)

Abstract

On présente une machine de perçage d'un trou de coulée d'un four à cuve par un procédé dans lequel, après avoir obturé le trou de coulée avec une masse de bouchage, on enfonce dans celle-ci, avant son durcissement complet, une tige et on extrait celle-ci, au moment voulu, en vue de l'ouverture du trou de coulée. Ladite machine comprend un affût (10), un chariot (32) déplaçable le long de cet affût (10), un moyen d'entraînement pour ledit premier chariot (32). Des moyens de guidage (68, 70) définissent un canal de guidage (64) de la tige et présentent une ouverture longitudinale (78) donnant accès a l'intérieur du canal de guidage (64) perpendiculairement à l'axe de celui-ci. Un doigt (42) pénètre à travers ladite ouverture longitudinale (78) à l'intérieur dudit canal de guidage (64) pour pouvoir exercer une poussée axiale sur une extrémité de la tige de perçage (54)A machine is presented for drilling a taphole of a shaft furnace by a process in which, after having closed the taphole with a plugging compound, a rod and it is extracted, at the desired time, with a view to opening the taphole. Said machine comprises a carriage (10), a carriage (32) movable along this carriage (10), a drive means for said first carriage (32). Guide means (68, 70) define a guide channel (64) for the rod and have a longitudinal opening (78) giving access to the interior of the guide channel (64) perpendicular to the axis thereof. . A finger (42) penetrates through said longitudinal opening (78) inside said guide channel (64) to be able to exert an axial thrust on one end of the drill rod (54)

Description

La présente invention concerne une machine de perçage d'un trou de coulée dans une paroi d'un four à cuve par un procédé dans lequel, après avoir obturé le trou de coulée avec une masse de bouchage, on enfonce dans celle-ci, avant son durcissement complet, une tige et on extrait celle-ci, au moment voulu, en vue de l'ouverture du trou de coulée. Une telle machine comprend un affût orientable devant la paroi du four à cuve dans une position de travail dans le prolongement de l'axe du trou de coulée, un premier chariot déplaçable le long de cet affût, un moyen d'entraînement pour ledit premier chariot entraînant ce chariot le long de cet affût.The present invention relates to a machine for drilling a tap hole in a wall of a shaft furnace by a method in which, after having closed the tap hole with a plugging mass, it is pressed into it before its complete hardening, a rod and one extracts it, at the desired time, for the opening of the tap hole. Such a machine comprises an adjustable carriage in front of the wall of the shaft furnace in a working position in the extension of the axis of the taphole, a first carriage movable along this carriage, a drive means for said first carriage driving this carriage along this lookout.

Il est connu d'utiliser pour l'application du procédé de la tige perdue des machines de perçage classiques, c'est-à-dire conçues pour travailler avec un foret pour forer le trou de coulée. Ces machines comportent alors un mandrin muni d'un moyen d'accouplement pour la tige et un puissant percuteur pneumatique bidirectionnel pour déployer l'énergie nécessaire à l'introduction et à l'extraction de la tige de perçage.It is known to use for the application of the lost rod process conventional drilling machines, that is to say designed to work with a drill to drill the tap hole. These machines then comprise a mandrel provided with a coupling means for the rod and a powerful bidirectional pneumatic striker to deploy the energy necessary for the introduction and the extraction of the piercing rod.

Or, un percuteur puissant, comme on l'utilise sur ces machines, n'est pas sans inconvénients. D'abord il impose d'importantes sollicitations et vibrations au matériel, notamment au moyen d'accouplement de la tige à l'organe de travail, qui est soumis de ce fait à une usure rapide. Un percuteur est aussi extrêmement bruyant et ne remplit souvent pas les normes de plus en plus sévères visant une réduction du niveau sonore en milieu industriel.However, a powerful striker, as it is used on these machines, is not without drawbacks. First, it imposes significant stresses and vibrations on the equipment, in particular by means of coupling of the rod to the working member, which is therefore subject to rapid wear. A striker is also extremely noisy and often does not meet the increasingly stringent standards aimed at reducing the noise level in an industrial environment.

Les inconvénients du percuteur pourraient inciter à la suppression de la percussion lors de l'introduction et de l'extraction de la tige.The disadvantages of the striker could encourage the removal of percussion during the introduction and extraction of the rod.

Pour l'opération d'extraction de la tige il est parfaitement envisageable d'utiliser un puissant moyen d'entraînement, qui est accouplé fermement à l'extrémité libre de la tige et retire cette dernière du trou de coulée par un mouvement de recul en force, c'est-à-dire sans produire de vibrations et d'une manière tout à fait silencieuse. Ce procédé d'extraction a été essayé entre-temps sur plusieurs machines et il donne entière satisfaction. Sur ces machines, on a utilisé comme moyen d'entraînement des vérins ou des moteurs hydrauliques et comme moyens d'accouplement du moyen d'entraînement à la tige des pinces spéciales.For the rod extraction operation, it is perfectly possible to use a powerful means drive, which is firmly coupled to the free end of the rod and withdraws the latter from the tap hole by a forceful recoil movement, that is to say without producing vibrations and in a completely made silent. This extraction process has been tried in the meantime on several machines and it is entirely satisfactory. On these machines, special cylinders have been used as driving means for hydraulic cylinders or motors and as means for coupling the driving means to the rod.

Malheureusement une telle solution silencieuse "en force" ne semble pas envisageable pour l'opération d'introduction de la tige dans la masse de bouchage en cours de durcissement. En effet, vues les dimensions de la tige (une tige normale a une longueur de 4 m et un diamètre de 4 cm), une poussée axiale puissante risque de provoquer d'abord un flambage de la tige et ensuite son blocage définitif dans une position partiellement enfoncée dans la masse en cours de durcissement rapide.Unfortunately, such a silent "force" solution does not seem possible for the operation of introducing the rod into the plugging mass during hardening. Indeed, given the dimensions of the rod (a normal rod has a length of 4 m and a diameter of 4 cm), a powerful axial thrust risks first of all causing the rod to buckle and then its final blocking in a position partially embedded in the mass during rapid hardening.

Il a dès lors été proposé de guider la tige métallique, lors de l'opération d'introduction "en force", par des guides intermédiaires montés sur l'affût et cernant circonférentiellement la tige à plusieurs endroits et de mettre ces guides successivement, au fur et à mesure de l'avancement de la pince vers l'avant de l'affût, dans une position qui ne gène pas l'avancement de la pince. Cette idée a été concrétisée par exemple en installant sur l'affût des guides coulissables qui sont poussés par l'avancement de la pince dans une position à l'avant de l'affût. Or, cette solution a certains désavantages manifestes. D'abord, ces guides intermédiaires coulissants constituent des éléments très vulnérables. Compte tenu des conditions de travail rudes auxquelles est soumise la machine de perçage, les guides risquent en effet de se bloquer dans leurs rails de guidage et de constituer ainsi un obstacle à l'avancement de la pince. Ensuite, l'aménagement d'une position de garage à l'avant de l'affût pour lesdits guides intermédiaires ne constitue non seulement un problème d'encombrement à l'avant de l'affût, mais soumet aussi les guides intermédiaires aux éclaboussures provenant du jet de fonte sortant du trou de coulée. De plus, l'expérience pratique a montré qu'un flambage de la tige entre deux appuis successifs n'est pas totalement exclu.It has therefore been proposed to guide the metal rod, during the "force" introduction operation, by intermediate guides mounted on the carriage and circumferentially surrounding the rod in several places and to put these guides successively, at the as the clamp advances towards the front of the carriage, in a position which does not hinder the progress of the clamp. This idea was concretized for example by installing on the carriage sliding guides which are pushed by the advancement of the clamp in a position in front of the carriage. This solution has certain obvious disadvantages. First, these sliding intermediate guides are very vulnerable elements. Taking into account the harsh working conditions to which the drilling machine is subjected, the guides are in fact likely to jam in their guide rails and thus to constitute an obstacle to the advancement of the clamp. Then, the arrangement of a garage position at the front of the carriage for said intermediate guides not only constitutes a space problem at the front of the carriage, but also subjects the intermediate guides to splashing from the jet of iron coming out of the tap hole. In addition, practical experience has shown that a buckling of the rod between two successive presses is not completely excluded.

Le but de la présente invention est de proposer une machine de perçage d'un trou de coulée d'un four à cuve, qui permet d'enfoncer ladite tige dans la masse d'obturation semi-durcie en exerçant une poussée puissante sur l'extrémité libre de la tige, sans pour autant provoquer le flambage de celle-ci, et qui ne présente pas les inconvénients cités ci-avant.The object of the present invention is to provide a machine for drilling a tap hole of a shaft furnace, which makes it possible to push said rod into the semi-hardened obturating mass by exerting a powerful push on the free end of the rod, without causing it to buckle, and which does not have the drawbacks mentioned above.

Pour atteindre cet objectif la présente invention propose une machine de perçage d'un trou de coulée du genre de celle définie dans le préambule qui est caractérisée par
   des moyens de guidage pour définir un canal de guidage de la tige, lesdits moyens de guidage définissant au moins une ouverture longitudinale donnant accès à l'intérieur du canal de guidage perpendiculairement à l'axe de celui-ci;
   par des moyens de support desdits moyens de guidage sur l'affût, lesdits moyens de support étant conçus de façon que l'axe longitudinal du canal de guidage soit coaxiale à l'axe du trou de coulée lorsque l'affût se trouve dans ladite position de travail devant la paroi du four à cuve pour enfoncer ladite tige métallique dans le trou de coulée, et
   par un doigt solidaire dudit premier chariot, ledit doigt étant dimensionné pour pénétrer à travers ladite ouverture longitudinale à l'intérieur dudit canal de guidage et pour pouvoir exercer une poussée axiale sur une extrémité de la tige métallique lors de l'avancement du premier chariot en direction du trou de coulée.To achieve this objective, the present invention provides a machine for drilling a tap hole of the kind defined in the preamble, which is characterized by
guide means for defining a guide channel for the rod, said guide means defining at least one longitudinal opening giving access to the interior of the guide channel perpendicular to the axis thereof;
by means for supporting said guide means on the carriage, said support means being designed so that the longitudinal axis of the guide channel is coaxial with the axis of the tap hole when the carriage is in said position working in front of the wall of the shaft furnace to push said metal rod into the tap hole, and
by a finger integral with said first carriage, said finger being dimensioned to penetrate through said longitudinal opening inside said guide channel and to be able to exert an axial thrust on one end of the metal rod when the first carriage advances in tap hole direction.

Selon la présente invention la tige de perçage coulisse dans le canal de guidage dans lequel peut pénétrer le doigt qui est solidaire du chariot entraîné le long de l'affût par le puissant moyen d'entraînement. On évite par ce guidage de la tige de perçage dans un canal tout risque de flambage, lorsqu'on applique par l'intermédiaire du doigt pénétrant dans le canal une poussée axiale appréciable à une extrémité de la tige pour enfoncer son extrémité opposée dans la masse de bouchage, avec laquelle on a obturé préalablement le trou de coulée. Il est évident que les moyens de guidage doivent être dimensionnés de façon à ne pas permettre un échappement radial de la tige dudit canal. Il sera cependant aussi noté que ledit canal de guidage peut présenter des discontinuités axiales et radiales, aussi longtemps qu'un échappement radial de la tige métallique soumis à l'effort de poussée axiale n'est pas à craindre.According to the present invention the piercing rod slides in the guide channel into which can penetrate the finger which is integral with the carriage driven along the carriage by the powerful drive means. This guidance of the piercing rod in a channel avoids any risk of buckling, when an appreciable axial thrust is applied to the end of the rod by means of the finger penetrating the channel in order to drive its opposite end into the mass. plugging, with which the tap hole was previously sealed. It is obvious that the guide means must be dimensioned so as not to allow a radial escape of the rod of said channel. It will however also be noted that said guide channel may have axial and radial discontinuities, as long as a radial escape of the metal rod subjected to the axial thrust force is not to be feared.

Le principal avantage de la présente machine est de pouvoir introduire en toute sécurité la tige de perçage dans la masse de bouchage par un effort exercé sur son extrémité libre sans devoir utiliser un percuteur bruyant, imposant d'importantes sollicitations de vibrations au matériel et à la machine.The main advantage of this machine is to be able to safely introduce the piercing rod into the plugging mass by a force exerted on its free end without having to use a noisy striker, imposing significant vibrations on the equipment and the machine.

Contrairement à la solution des guides intermédiaires coulissants, le présent canal de guidage ne doit par être enlevé au fur et à mesure de l'avancement dudit doigt, solidaire du chariot déplaçable le long de l'affût. Il sera aussi apprécié que le seul élément qui doit être mobile selon la présente invention est le chariot qui supporte le doigt pénétrant à l'intérieur du canal. En effet les moyens de guidage définissant le canal de guidage de la tige métallique ne gênent nullement l'avancement du doigt solidaire du chariot déplaçable et peuvent de ce fait rester en place pendant toute l'opération d'introduction de la tige.Unlike the solution of the sliding intermediate guides, the present guide channel must not be removed as the advancement of said finger, integral with the carriage movable along the carriage. It will also be appreciated that the only element which must be movable according to the present invention is the carriage which supports the finger penetrating inside the channel. Indeed, the guide means defining the guide channel of the metal rod in no way hinder the advancement of the finger secured to the movable carriage and can therefore remain in place during the entire operation of introducing the rod.

Lesdits moyens de guidage pourraient cependant encore être gênants lors de l'opération d'extraction de la tige avec une pince classique, ou bien lorsque qu'on veut travailler avec une foreuse classique déplaçable le long de l'affût pour forer le trou de coulée avec un foret. Voilà pourquoi il est avantageux de supporter lesdits moyens de support par l'intermédiaire de bras articulés sur l'affût. Cette solution permet de pivoter latéralement lesdits moyens de guidage, libérant, le cas échéant, le gabarit nécessaire le long de l'affût pour extraire la tige à l'aide d'une pince classique, ou bien pour travailler avec une foreuse coulissable le long de l'affût. Ce pivotement ou rabattement desdits moyens de guidage dans une position latérale par rapport à l'affût a de plus l'avantage d'enlever lesdits moyens de guidage de la zone la plus dangereuse en face du trou de coulée, qui est naturellement celle qui est située directement dans le prolongement de l'axe du jet lors de l'ouverture du trou de coulée.Said guide means could however still be troublesome during the operation of extracting the rod with a conventional pliers, or when it is desired to work with a conventional drilling machine which can be moved along the carriage to drill the taphole with a drill. This is why it is advantageous to support said support means by means of arms articulated on the carriage. This solution makes it possible to pivot said guide means laterally, freeing up, if necessary, the template required along the carriage to extract the rod using conventional pliers, or else to work with a drill sliding along on the lookout. This pivoting or folding down of said guide means in a lateral position with respect to the carriage has the advantage of removing said guide means from the most dangerous zone opposite the tap hole, which is naturally the one which is located directly in the extension of the jet axis when opening the tap hole.

Selon une exécution préférentielle de la présente invention, le canal de guidage de la tige est définie par un tube, ayant un diamètre légèrement plus grand que celui de la tige et étant muni d'au moins une fente longitudinale qui traverse selon une génératrice radialement sa paroi sur toute sa longueur. Il s'agit d'une réalisation particulièrement simple et peu coûteuse desdits moyens de guidage. La fente longitudinale permet la pénétration dudit doigt à l'intérieur du tube afin qu'il puisse exercer une poussée axiale sur l'extrémité de la tige lors de l'avancement du chariot le long de l'affût en direction du trou de coulée.According to a preferred embodiment of the present invention, the guide channel of the rod is defined by a tube, having a diameter slightly larger than that of the rod and being provided with at least one longitudinal slot which crosses along a generatrix radially its wall over its entire length. It is a particularly simple and inexpensive embodiment of said guide means. The longitudinal slot allows the penetration of said finger inside the tube so that it can exert an axial thrust on the end of the rod during the advancement of the carriage along the carriage in the direction of the tap hole.

Le chargement de la tige métallique dans le canal de guidage peut naturellement se faire axialement en enfonçant la tige par une extrémité du canal. L'introduction de la tige est cependant facilitée lorsque les moyens de guidage peuvent être ouverts longitudinalement pour poser librement la tige dans son canal de guidage. A cette fin lesdits moyens de guidage peuvent par exemple être constitués de pièces longitudinales qui sont juxtaposées pour définir conjointement ledit canal de guidage. Dans une exécution préférentielle, le tube servant de moyens de guidages est scindé longitudinalement en un premier et second segment de tube. De cette façon le tube peut être ouvert longitudinalement pour y mettre la tige métallique et refermé pour former ledit canal de guidage. Le premier segment de tube est alors avantageusement monté sur des premiers bras articulés le long d'un premier côté latéral de l'affût et le second segment de tube est monté sur des seconds bras articulés le long du côté latéral opposé de l'affût. Ce montage permet de pivoter le premier segment de tube et le second segment de tube latéralement dans des directions opposées pour ouvrir ledit canal. Dans la position ouverte du canal on peut alors facilement poser la tige métallique dans un des deux segments de tube, puis reconstituer le canal de guidage par pivotement des deux segments de tubes dans leur position initiale. Il sera noté que ce montage permet aussi de libérer un certain gabarit entre les deux segments de tubes. Ce gabarit peut être nécessaire pour le passage d'une pince ou d'une foreuse qui sont déplaçables sur ledit affût.The loading of the metal rod into the guide channel can naturally be done axially by pushing the rod through one end of the channel. The introduction of the rod is however facilitated when the guide means can be opened longitudinally to freely place the rod in its guide channel. To this end said guide means may for example consist of longitudinal parts which are juxtaposed to jointly define said guide channel. In a preferred embodiment, the tube serving as guide means is split longitudinally into a first and second tube segment. In this way the tube can be opened longitudinally to put the metal rod in it and closed to form said guide channel. The first tube segment is then advantageously mounted on first articulated arms along a first lateral side of the mount and the second tube segment is mounted on second articulated arms along the opposite lateral side of the mount. This arrangement makes it possible to pivot the first tube segment and the second tube segment laterally in opposite directions to open said channel. In the open position of the channel, it is then easy to place the metal rod in one of the two tube segments, then reconstitute the guide channel by pivoting the two tube segments in their initial position. It will be noted that this arrangement also makes it possible to release a certain size between the two tube segments. This template may be necessary for the passage of a clamp or a drill which are movable on said carriage.

Les moyens de support pivotables sont avantageusement actionnés par un ou plusieurs vérins. Ce ou ces vérins assurent alors le maintien du canal de guidage dans l'axe du trou de coulée pendant l'opération d'enfoncement de la tige et permettent le rabattement des moyens de guidage lorsque ces derniers ne sont pas utilisés. Ils peuvent être montés dans une zone protégée de l'affût et peuvent être efficacement protégés contre les éclaboussures.The pivotable support means are advantageously actuated by one or more jacks. This or these jacks then maintain the guide channel in the axis of the taphole during the sinking operation of the rod and allow the guide means to be folded down when the latter are not used. They can be mounted in a protected area from the lookout and can be effectively protected against splashing.

Ledit moyen d'entraînement du premier chariot doit être capable de déplacer ce dernier le long de l'affût en direction du trou de coulée, en exerçant par l'intermédiaire du doigt une force suffisante sur l'extrémité libre de la tige de perçage pour faire passer l'autre extrémité à travers la masse de bouchage en train de durcir dans le trou de coulée. Dans une réalisation préférentielle de la machine de perçage ce moyen d'entraînement comprend une chaîne sans fin qui est entraînée par un moteur hydraulique. Il s'agit d'un moyen d'entraînement particulièrement simple qui peut cependant délivrer des efforts d'entraînement appréciables. De plus la chaîne est autonettoyante et ne nécessite pas d'entretien.Said means of driving the first carriage must be capable of moving the latter along the carriage in the direction of the tap hole, by exerting sufficient force through the finger on the free end of the piercing rod to pass the other end through the plugging mass hardening in the tap hole. In a preferred embodiment of the drilling machine, this drive means comprises an endless chain which is driven by a hydraulic motor. It is a particularly simple training means which can however deliver appreciable training efforts. In addition, the chain is self-cleaning and does not require maintenance.

Il sera noté que la machine de perçage est avantageusement munie d'un organe de travail comprenant une foreuse et éventuellement un puissant percuteur. On se préserve ainsi sur cette machine la possibilité de pouvoir travailler avec un foret normal. Ceci peut être utile pour reformer ou déplacer le trou de coulée, ou pour travailler avec un foret classique lorsque le procédé de la tige perdue ne peut être utilisé pour une raison ou une autre. Dans ce cas il est avantageux de prévoir des moyens pour accoupler ledit organe de travail aux moyens d'entraînement du premier chariot. On évite ainsi de devoir installer un deuxième système d'entraînement sur la machine.It will be noted that the drilling machine is advantageously provided with a working member comprising a drill and possibly a powerful striker. We thus preserve on this machine the possibility of being able to work with a normal drill. This can be useful for reforming or moving the tap hole, or for working with a conventional drill when the lost rod method cannot be used for one reason or another. In this case it is advantageous to provide means for coupling said working member to the drive means of the first carriage. This avoids having to install a second drive system on the machine.

Pour extraire la tige métallique dudit trou de coulée, lorsqu'on veut ouvrir ce dernier, on peut utiliser avantageusement le moyen d'entraînement du premier chariot. Ce moyen d'entraînement doit alors être capable d'exercer aussi un effort important en direction de l'extraction de la tige. La présente machine comprend dans ce cas des moyens pour accoupler fermement l'extrémité libre de la tige audit moyen d'entraînement. Ce dernier retire la tige du trou de coulée par une mouvement de recul en force, c'est-à-dire sans produire des vibrations et d'une manière tout à fait silencieuse. Les moyens d'accouplement utilisés pour l'extraction de la tige peuvent par exemple comprendre un crochet qui est monté sur ledit premier chariot. Ce crochet s'engage alors a travers ladite ouverture longitudinale du canal de guidage pour prendre appui derrière un épaulement usiné dans l'extrémité libre de la tige. Il permet d'exercer un effort de traction sur la tige et de la retirer, au fur et à mesure du recul du chariot sur l'affût, à travers le canal de guidage en dehors du trou de coulée. On peut aussi travailler avec plusieurs crochets s'engageant à travers plusieurs ouvertures longitudinales réparties autour du canal de guidage. Cette variante permet de réduire la pression de contact à supporter par l'épaulement usiné dans la tige.To extract the metal rod from said tap hole, when it is desired to open the latter, it is advantageous to use the drive means of the first carriage. This drive means must then be able to also exert a significant force in the direction of the extraction of the rod. The present machine in this case comprises means for firmly coupling the free end of the rod to said drive means. The latter withdraws the rod from the tap hole by a forceful recoil movement, that is to say without producing vibrations and in a completely silent manner. The coupling means used for the extraction of the rod may for example comprise a hook which is mounted on said first carriage. This hook then engages through said longitudinal opening of the guide channel to bear. behind a machined shoulder in the free end of the rod. It makes it possible to exert a tensile force on the rod and to withdraw it, as the carriage moves back on the carriage, through the guide channel outside the taphole. It is also possible to work with several hooks engaging through several longitudinal openings distributed around the guide channel. This variant makes it possible to reduce the contact pressure to be supported by the shoulder machined in the rod.

Pour dégager la tige du trou de coulée on peut cependant aussi rabattre lesdits moyens de guidage dans une position latérale par rapport à l'affût. Dans ce cas on dispose d'un gabarit suffisant dans l'axe de la tige pour utiliser n'importe quel moyen qui permet d'accoupler fermement l'extrémité de la tige audit moyen d'entraînement pour lui appliquer une importante force de traction. De tels moyens sont par exemple des pinces a mâchoires telles que décrites dans le brevet britannique GB 2,116,898, des mandrins avec un filet femelle pouvant être vissé sur un filet mâle usiné dans l'extrémité libre de la tige, des mandrins à clavette transversale coopérant avec un méplat usiné dans l'extrémité de la tige etc.To release the rod from the taphole, however, it is also possible to fold the said guide means into a lateral position relative to the carriage. In this case, there is a sufficient template in the axis of the rod to use any means which makes it possible to firmly couple the end of the rod to said drive means in order to apply to it a large tensile force. Such means are for example jaw pliers as described in British patent GB 2,116,898, mandrels with a female thread which can be screwed onto a male thread machined in the free end of the rod, transverse key mandrels cooperating with a machined flat in the end of the rod etc.

Il sera aussi apprécié que la présente machine comprend dans une exécution préférentielle un appui intermédiaire coulissant sur et déplaçable le long de l'affût, qui permet de supporter une tige ou un foret en absence du canal de guidage.It will also be appreciated that the present machine comprises in a preferred embodiment an intermediate support sliding on and movable along the carriage, which makes it possible to support a rod or a drill in the absence of the guide channel.

Un écran monté à l'avant de l'affût protège efficacement la machine contre des éclaboussures provenant du jet sortant du trou de coulée.A screen mounted at the front of the mount effectively protects the machine against splashes from the jet coming out of the tap hole.

D'autres avantages et caractéristiques ressortiront de la description détaillée d'exécutions préférentielles, présentées ci-après, à titre d'illustrations et en se référant aux dessins annexés, dans lesquels:

  • la Figure 1 montre une vue de face de l'affût d'une machine de perçage selon l'invention;
  • la Figure 2 montre une coupe longitudinale à travers l'affût de la Figure 1;
  • la Figure 3 montre une coupe transversale à travers l'affût de la Figure 1;
  • la Figure 4 montre une coupe longitudinale à travers le premier chariot supportant le doigt;
  • la Figure 5 montre une coupe transversale à travers le premier chariot supportant le doigt;
  • la Figure 6 montre une coupe à travers un chariot supportant un appui intermédiaire sur l'affût;
  • la Figure 7 montre, dans une coupe transversale à travers la machine selon la Figure 1, le montage dans l'affût du chariot supportant l'appui intermédiaire;
  • Les Figures 8 et 9 montrent, dans des vues semblables aux Figures 4 et 5, comment le premier chariot supportant le doigt peut être utilisé pour entraîner l'organe de travail;
  • Les Figures 10 et 11, respectivement 12 et 13, montrent dans des vues semblables aux Figures 4 et 5, comment on peut intégrer une pince à mâchoires pour l'extraction de la tige dans ledit premier chariot supportant le doigt;
  • Les Figures 14 et 15, respectivement 16 et 17, montrent dans des vues semblables aux Figures 4 et 5, une variante intéressante d'une pince à crochets pour l'extraction de la tige du trou de coulée.
Other advantages and characteristics will emerge from the detailed description of preferential embodiments, presented below, by way of illustration and with reference to the appended drawings, in which:
  • Figure 1 shows a front view of the carriage of a drilling machine according to the invention;
  • Figure 2 shows a longitudinal section through the carriage of Figure 1;
  • Figure 3 shows a cross section through the carriage of Figure 1;
  • Figure 4 shows a longitudinal section through the first carriage supporting the finger;
  • Figure 5 shows a cross section through the first carriage supporting the finger;
  • Figure 6 shows a section through a carriage supporting an intermediate support on the carriage;
  • Figure 7 shows, in a cross section through the machine according to Figure 1, the mounting in the carriage of the carriage supporting the intermediate support;
  • Figures 8 and 9 show, in views similar to Figures 4 and 5, how the first carriage supporting the finger can be used to drive the working member;
  • Figures 10 and 11, respectively 12 and 13, show in views similar to Figures 4 and 5, how one can integrate a jaw clamp for the extraction of the rod in said first carriage supporting the finger;
  • Figures 14 and 15, respectively 16 and 17, show in views similar to Figures 4 and 5, an interesting variant of a hook clamp for the extraction of the rod from the tap hole.

Toutes les Figures comportent les mêmes chiffres de référence pour désigner les mêmes pièces.All the Figures have the same reference numbers to designate the same parts.

Pour la description de l'ensemble de la machine on se réfère par exemple aux Figures 1 et 2. Ces deux figures montrent un affût 10 d'une machine de perçage. Cet affût 10 est par exemple supporté à l'extrémité d'un bras porteur (non représenté) via une pièce centrale 12 solidaire de l'affût 10. Ce bras porteur peut pivoter de manière classique et connue autour d'une console (non représentée) pour déplacer l'affût entre une position de garage et une position de travail et vice versa. Dans cette position de travail l'affût 10 peut être orienté devant la paroi du four de façon que son axe longitudinal soit situé dans le prolongement de l'axe du trou de coulée.For the description of the whole machine, reference is made for example to Figures 1 and 2. These two figures show a carriage 10 of a drilling machine. This mount 10 is for example supported at the end of a support arm (not shown) via a central piece 12 secured to the mount 10. This support arm can pivot in a conventional and known manner around a console (not shown ) to move the carriage between a garage position and a working position and vice versa. In this working position the carriage 10 can be oriented in front of the wall of the furnace so that its longitudinal axis is located in the extension of the axis of the tap hole.

L'affût peut par exemple être formé de plusieurs poutres ou profilés métalliques soudés ensembles pour former une sorte de caisson. Ce caisson 14 comporte deux parois latérales 16, 18 reliées par une tôle supérieure 20 et délimitant une ouverture longitudinale 22 vers le bas. Dans le caisson 14 est monté au moins une chaîne sans fin 24. Cette chaîne sans fin 24 est tendue entre une roue dentée menée 26 montée à l'avant de l'affût 10 et une roue dentée menante 28 montée à l'arrière de l'affût 10. La roue menante 28 est entraînée par au moins un moteur 30 fixé sur l'affût 10. Il s'agit de préférence d'un moteur hydraulique dont le sens de rotation peut être inversé par un système de commande adapté.The carriage can for example be formed from several beams or metal sections welded together to form a sort of box. This box 14 has two side walls 16, 18 connected by an upper plate 20 and defining a longitudinal opening 22 downwards. In the box 14 is mounted at least one endless chain 24. This endless chain 24 is stretched between a driven toothed wheel 26 mounted at the front of the carriage 10 and a driving toothed wheel 28 mounted at the rear of the 'carriage 10. The driving wheel 28 is driven by at least one motor 30 fixed on the carriage 10. It is preferably a hydraulic motor whose direction of rotation can be reversed by a suitable control system.

Dans le caisson 14 coulisse un premier chariot 32 qui est entraîné par ladite chaîne sans fin 24. Ce premier chariot 32 est montré plus en détail sur la Figure 4. Il comporte de chaque côté une paire de galets 34, 36 qui sont guidés respectivement dans un premier rail 38 et dans un second rail 40. Ces rails 38, 40, qui ont une section en U (cf. Figure 5), font partie intégrante des parois latérales 16, 18 du caisson 14.In the box 14 slides a first carriage 32 which is driven by said endless chain 24. This first carriage 32 is shown in more detail in FIG. 4. It has on each side a pair of rollers 34, 36 which are guided respectively in a first rail 38 and in a second rail 40. These rails 38, 40, which have a U-shaped section (cf. FIG. 5), form an integral part of the side walls 16, 18 of the box 14.

Sur le chariot 32 est monté un doigt 42 comportant un tronc plat 44 qui prolonge le chariot 32 vers le bas à travers ladite ouverture longitudinale 22 dans le caisson 14 formant l'affût 10. Ce doigt 42 est de préférence monté dans le chariot 32 à l'aide d'un axe cylindrique 46, logé dans des alésages 48, 50 du chariot 32 et passant par un alésage 52 du tronc 44, de façon à pouvoir pivoter dans le plan vertical passant par l'axe de déplacement du premier chariot 32.On the carriage 32 is mounted a finger 42 comprising a flat trunk 44 which extends the carriage 32 downwards through said longitudinal opening 22 in the box 14 forming the carriage 10. This finger 42 is preferably mounted in the carriage 32 to using a cylindrical axis 46, housed in bores 48, 50 of the carriage 32 and passing through a bore 52 of the trunk 44, so as to be able to pivot in the vertical plane passing through the axis of movement of the first carriage 32 .

Sur la Figure 2 aussi bien que sur la Figure 5, le doigt 42 est montré dans une position dans laquelle il prend appui avec son extrémité inférieure sur une tige de perçage 54. Cette dernière a été mise en place dans la machine de perçage pour être enfoncée dans une masse de bouchage qui a été préalablement injectée dans le trou de coulée. L'extrémité inférieure du doigt 42 qui prend appui sur la tige 54 a la forme d'un bourrelet cylindrique 56 qui s'étend dans le prolongement de l'axe de la tige 54. Il sera noté que le doigt 42 possède un prolongement 58 de son tronc 44 de l'autre côté de l'axe cylindrique 46. Ce prolongement 58 prend appui sur une surface d'appui 60 du premier chariot 32 lorsque le bourrelet cylindrique 56 du doigt exerce une poussée axiale sur l'extrémité de la tige 54. Dans la position montrée sur la Figure 4 le doigt 42 peut donc uniquement pivoter dans le sens des aiguilles d'une montre, c'est-à-dire dans le sens de la flèche repérée par la référence 62.In Figure 2 as well as in Figure 5, the finger 42 is shown in a position in which it is supported with its lower end on a piercing rod 54. The latter has been put in place in the piercing machine to be pressed into a plugging mass which has been previously injected into the taphole. The lower end of the finger 42 which bears on the rod 54 has the shape of a cylindrical bead 56 which extends in the extension of the axis of the rod 54. It will be noted that the finger 42 has an extension 58 of its trunk 44 on the other side of the cylindrical axis 46. This extension 58 bears on a bearing surface 60 of the first carriage 32 when the cylindrical bead 56 of the finger exerts an axial thrust on the end of the rod 54. In the position shown in FIG. 4, the finger 42 can therefore only pivot in the clockwise direction, that is to say in the direction of the arrow indicated by the reference 62.

La tige est guidée dans un canal 64 formé par un tube cylindrique 66. Ce tube 66 qui a sensiblement la même longueur que la tige et un diamètre intérieur légèrement plus grand que le diamètre de la tige, est constitué de préférence de deux segments de tube 68, 70 qui sont quasi symétriques par rapport à un plan passant par l'axe longitudinal du tube. Chacun des deux segments 68, 70 est supporté par plusieurs bras coudés 72, 72'. Les bras coudés 72 supportant le premier segment de tube 68 sont espacés axialement et fixés sur un tube 74 longeant la première paroi latérale 16 du caisson 14 formant l'affût (cf. Figures 1 et 3). Ce tube 74 est monté, par exemple au milieu et à ses deux extrémités, par l'intermédiaire d'articulations cylindriques 76 sur cette première paroi latérale 16, de façon qu'il puisse pivoter autour de son axe longitudinal. Les bras coudés 74'supportant le deuxième segment de tube 70 sont montés de façon identique le long de la paroi latérale opposée 18 de l'affût 10. Les éléments intervenant dans le montage du deuxième segment de tube 70 sont repérés par les mêmes numéros de référence que les éléments de montage du premier segment de tube 68, munis cependant d'un accent.The rod is guided in a channel 64 formed by a cylindrical tube 66. This tube 66 which has substantially the same length as the rod and an inner diameter slightly larger than the diameter of the rod, preferably consists of two tube segments 68, 70 which are almost symmetrical with respect to a plane passing through the longitudinal axis of the tube. Each of the two segments 68, 70 is supported by several bent arms 72, 72 '. The bent arms 72 supporting the first tube segment 68 are axially spaced and fixed on a tube 74 running along the first side wall 16 of the box 14 forming the mount (cf. FIGS. 1 and 3). This tube 74 is mounted, for example in the middle and at its two ends, by means of cylindrical articulations 76 on this first side wall 16, so that it can pivot around its longitudinal axis. The bent arms 74 'supporting the second tube segment 70 are mounted identically along the opposite side wall 18 of the carriage 10. The elements involved in the mounting of the second tube segment 70 are identified by the same numbers reference that the mounting elements of the first tube segment 68, however provided with an accent.

Sur la Figure 5 on voit les deux segments de tube 68, 70 dans une position dans laquelle ils sont juxtaposés pour former le canal de guidage 64. Dans cette position l'axe défini par ledit canal de guidage 64 est une droite qui est parallèle à la direction de roulement du premier chariot 32. Cet axe est plus précisément situé dans le plan médian longitudinal du premier chariot 32.In Figure 5 we see the two tube segments 68, 70 in a position in which they are juxtaposed to form the guide channel 64. In this position the axis defined by said guide channel 64 is a straight line which is parallel to the rolling direction of the first carriage 32. This axis is more precisely located in the longitudinal median plane of the first carriage 32.

Le tube 66 formé par juxtaposition des deux segments de tube 68, 70 est muni d'une fente longitudinale 78 traversant selon une génératrice radialement sa paroi sur toute sa longueur. Sur la Figure 5 on voit que cette fente 78 est tournée vers l'ouverture longitudinale 22 dans l'affût 10. De cette façon le doigt peut pénétrer avec son tronc plat 44 à travers la fente 78 à l'intérieur du tube 66, dans lequel le bourrelet 56 peut coulisser librement lorsque le premier chariot 32 est déplacé le long de l'affût 10. Au niveau du raccord entre le bourrelet cylindrique 56 et le tronc 44 du doigt, ce dernier présente avantageusement un étranglement 80. Cet étranglement 80 permet de limiter la largeur de la fente 78, de façon à éviter que la tige 54 ne puisse venir se coincer dans la fente 78 lorsque le doigt 42 exerce une poussée axiale sur l'extrémité de cette dernière.The tube 66 formed by juxtaposition of the two tube segments 68, 70 is provided with a longitudinal slot 78 passing through a generatrix radially its wall over its entire length. In Figure 5 we see that this slot 78 is facing the longitudinal opening 22 in the mount 10. In this way the finger can penetrate with its flat trunk 44 through the slot 78 inside the tube 66, in which the bead 56 can slide freely when the first carriage 32 is moved along the carriage 10. At the connection between the cylindrical bead 56 and the trunk 44 of the finger, the latter advantageously has a constriction 80. This constriction 80 allows to limit the width of the slot 78, so as to prevent the rod 54 from being able to get stuck in the slot 78 when the finger 42 exerts an axial thrust on the end of the latter.

Lors de l'enfoncement de la tige 54 dans la masse de bouchage, celle-ci est ainsi guidée sur toute sa longueur, à l'exception du morceau s'étendant entre la paroi du four à cuve et l'avant de l'affût 10. Or, la longueur de ce morceau non guidé est bien inférieure à la longueur critique pour laquelle un flambement risque de se produire. Il est entendu que des interruptions axiales dudit canal de guidage ne sont pas non plus gênantes, aussi longtemps que l'enfoncement en force de la tige 56 dans la masse de bouchage peut s'effectuer en toute sécurité sans devoir craindre un flambement aux endroits où la tige métallique n'est pas guidée. On ne s'écarte par exemple pas de l'enseignement de la présente invention en définissant ledit canal de guidage 64 par plusieurs manchons coaxiaux qui sont espacés axialement d'une distance inférieure à la longueur critique pour laquelle un flambement risque de se produire entre deux manchons de guidage successifs.When the rod 54 is inserted into the plugging mass, the latter is thus guided over its entire length, with the exception of the piece extending between the wall of the shaft furnace and the front of the carriage 10. However, the length of this unguided piece is much less than the critical length for which buckling is likely to occur. It is understood that axial interruptions of said guide channel are not bothersome, as long as the forced insertion of the rod 56 into the blocking mass can be carried out safely without having to fear buckling at the places where the metal rod is not guided. For example, the teaching of the present invention does not depart from the definition of said guide channel 64 by several coaxial sleeves which are axially spaced apart by a distance less than the critical length for which buckling is likely to occur between two successive guide sleeves.

Sur la Figure 3 les deux segments de tube 68, 70, définissant le canal 64 lorsqu'ils sont juxtaposés l'un contre l'autre, sont montrés écartés l'un de l'autre. Cet agencement est obtenu par pivotement du tube 74, supportant par l'intermédiaire des bras coudés 72 le premier segment de tube 68, et par pivotement du tube 74', supportant par l'intermédiaire des bras coudés 72' le second segment de tube 70, autour de leur axe respectif et dans des directions opposées. Ce pivotement est avantageusement réalisé par l'intermédiaire d'un ou de plusieurs vérins 82, 84.In Figure 3 the two tube segments 68, 70, defining the channel 64 when they are juxtaposed against each other, are shown spaced from one another. This arrangement is obtained by pivoting the tube 74, supporting via the bent arms 72 the first tube segment 68, and by pivoting the tube 74 ', supporting via the bent arms 72' the second tube segment 70 , around their respective axis and in opposite directions. This pivoting is advantageously carried out by means of one or more jacks 82, 84.

Dans l'exécution représentée sur les Figures 1 et 3 chacun des tubes 74, 74' est muni de son propre vérin 82, 84. Ces deux vérins 82, 84 sont arrangés latéralement de l'affût, à mi-longueur des tubes 74, 74' de façon à être à l'abri des éclaboussures de fonte projetées en-dehors du trou de coulée lors de son ouverture. Ils peuvent aussi être munis d'une cage de protection (non représentée) qui ne gène nullement à cet endroit de l'affût 10. Chacun des deux vérins 82, 84 est articulé selon les règles de l'art avec une de ses extrémités sur un support 86 solidaire de l'affût 10, et avec l'autre extrémité sur un bras de levier 88, 88' solidaire respectivement du premier tube 74 ou du deuxième tube 74. Sur la Figure 3 le bras de levier 88, 88' est un prolongement d'un bras coudé 72, 72'. On notera qu'une extension des deux vérins 82, 84 provoque un rapprochement des deux segments de tubes 68, 70, jusqu'à leur rencontre au niveau du plan médian longitudinal de l'affût 10. Dans cette position, montrée sur la Figure 5, les deux vérins poussent les deux segments de tube 68, 70 fermement l'un contre l'autre pour définir le canal de guidage 64.In the embodiment shown in FIGS. 1 and 3, each of the tubes 74, 74 ′ is provided with its own jack 82, 84. These two jacks 82, 84 are arranged laterally of the carriage, halfway along the tubes 74, 74 'so as to be protected from splashes of cast iron projected outside the tap hole when it is opened. They can also be provided with a protective cage (not shown) which in no way interferes with this position of the carriage 10. Each of the two jacks 82, 84 is articulated according to the rules of the art with one of its ends on a support 86 secured to the carriage 10, and with the other end on a lever arm 88, 88 'secured respectively to the first tube 74 or the second tube 74. In Figure 3 the lever arm 88, 88' is an extension of a bent arm 72, 72 '. It will be noted that an extension of the two cylinders 82, 84 causes the two tube segments 68, 70 to come together until they meet at the level of the longitudinal median plane of the carriage 10. In this position, shown in FIG. 5 , the two cylinders push the two tube segments 68, 70 firmly against each other to define guide channel 64.

Une rétraction des deux vérins 82, 84 provoque un écartement des deux segments de tube 68, 70 (cf. figure 3) et l'ouverture longitudinale du canal 64 de façon qu'on puisse facilement poser la tige 54 dans un des deux segments de tube. Celui-ci, sur la figure 3 il s'agit du segment de droite 70, est alors avantageusement muni de griffes 90 pour supporter la tige 54. Ces griffes 90 sont espacées axialement, comme montré sur les Figures 1 et 2, et pénètrent lors de l'assemblage des deux segments de tube 68, 70 dans des encoches correspondantes 92 effectuées dans l'autre segment de tube 68.A retraction of the two cylinders 82, 84 causes a separation of the two tube segments 68, 70 (cf. FIG. 3) and the longitudinal opening of the channel 64 so that the rod 54 can easily be placed in one of the two segments of tube. This, in Figure 3 it is the straight segment 70, is then advantageously provided with claws 90 to support the rod 54. These claws 90 are spaced axially, as shown in Figures 1 and 2, and penetrate during of the assembly of the two tube segments 68, 70 in corresponding notches 92 made in the other tube segment 68.

Il sera apprécié que les deux segments de tube 68, 70 sont des pièces réalisables à faible coût, à partir de tubes en acier découpés longitudinalement. Ces segments de tube sont de préférence fixés de façon démontable sur les bras coudés 72, 72', par exemple à l'aide de pattes 94 soudées sur les segments de tube et vissées sur les bras coudés 72, 72'. Une telle patte 94 est représentée au niveau du bras gauche 72 de la figure 3. Ce montage permet de remplacer facilement les segments de tube 72, 72' lorsqu'ils sont accidentellement endommagés à l'avant de l'affût 10 par la fonte sortant du trou de coulée.It will be appreciated that the two tube segments 68, 70 are parts that can be produced at low cost, from steel tubes cut longitudinally. These tube segments are preferably detachably fixed on the bent arms 72, 72 ', for example using lugs 94 welded on the tube segments and screwed on the bent arms 72, 72'. Such a tab 94 is represented at the level of the left arm 72 of FIG. 3. This assembly makes it possible to easily replace the tube segments 72, 72 ′ when they are accidentally damaged at the front of the carriage 10 by the outgoing cast iron. of the tap hole.

Sur la figure 3, on voit que l'écartement des deux segments de tube 68, 70 libère un gabarit en-dessous de l'affût 10 qui est suffisant pour faire passer un organe de travail 100. Cet organe de travail 100 comporte usuellement une foreuse et un percuteur. Sa présence se justifie pour pouvoir forer, le cas échéant, un trou de coulée avec un foret classique. Tel peut par exemple être le cas lorsqu'on veut reformer ou déplacer le trou de coulée, ou lorsqu'on ne peut pas utiliser le procédé de la tige perdue pour une raison ou pour une autre. L'organe de travail 100 est muni d'un mandrin 102 qui peut être accouplé à un foret. A cette fin, le doigt 42 est pivoté vers le haut c'est-à-dire en direction de la flèche 62 de la Figure 4 pour permettre l'introduction du foret dans le mandrin. Les segments de tube 68, 70 sont écartés latéralement pour libérer le gabarit nécessaire au passage de l'organe de travail 100.In Figure 3, we see that the spacing of the two tube segments 68, 70 releases a template below the mount 10 which is sufficient to pass a working member 100. This working member 100 usually comprises a drill and a striker. Its presence is justified to be able to drill, if necessary, a tap hole with a conventional drill. This can for example be the case when one wants to reform or move the tap hole, or when one cannot use the lost rod process for one reason or another. The working member 100 is provided with a mandrel 102 which can be coupled to a drill. To this end, the finger 42 is pivoted upwards, that is to say in direction of arrow 62 in Figure 4 to allow the introduction of the drill into the mandrel. The tube segments 68, 70 are separated laterally to free the template necessary for the passage of the working member 100.

L'organe de travail 100 est monté sur un deuxième chariot 104 qui coulisse à l'aide de deux paires de galets 106, 108 dans une paire de rails 110, 112. Ces derniers sont fixés dans le caisson 14, parallèlement en-dessous des rails 38, 40 supportant le premier chariot 32. Ils ont des section en U et sont disposés de façon à guider le deuxième chariot verticalement et latéralement.The working member 100 is mounted on a second carriage 104 which slides using two pairs of rollers 106, 108 in a pair of rails 110, 112. These are fixed in the box 14, parallel below the rails 38, 40 supporting the first carriage 32. They have U-shaped sections and are arranged so as to guide the second carriage vertically and laterally.

L'organe de travail 100 est avantageusement entraîné par le même moyen d'entraînement que le premier chariot 32. A cette fin, le deuxième chariot 104 peut par exemple être accouplé par des crochets (non représentés) ou tout autre moyen équivalent au premier chariot 32.The working member 100 is advantageously driven by the same drive means as the first carriage 32. To this end, the second carriage 104 can for example be coupled by hooks (not shown) or any other means equivalent to the first carriage 32.

Il sera noté que l'organe de travail 100 pourra aussi être utilisé pour l'extraction en force de la tige, lorsqu'il est muni de moyens d'accouplement 102 adéquats pour s'accoupler à l'extrémité de la tige 54 sortant du trou de coulée. De préférence le premier chariot 32 est alors muni d'un organe qui transmet l'effort de traction directement sur lesdits moyens d'accouplement, de façon à éviter que la transmission de l'effort de traction se fasse à travers la mécanique de l'organe de travail. Cet organe peut par exemple être une fourche 105 solidaire dudit prolongement 58 du doigt 42 articulé sur le premier chariot 32 (cf. figure 4). Lors de l'extraction de la tige 54, la fourche 105 prend alors appui sur un épaulement 106 de l'accouplement 102 monté sur l'organe de travail 100 pour exercer sur ce dernier une poussée axiale dans le sens de l'extraction de la tige 54. Il sera remarqué que dans cette position, le doigt articulé 42 butte contre une surface d'appui 108 du premier chariot 32. Le chariot 104 est simplement poussé devant le premier chariot 32. L'organe de travail 100 ne doit transmettre aucun effort de traction et sert uniquement de support coulissant pour le moyen d'accouplement 102.It will be noted that the working member 100 may also be used for the force extraction of the rod, when it is provided with coupling means 102 suitable for coupling to the end of the rod 54 leaving the tap hole. Preferably, the first carriage 32 is then provided with a member which transmits the tensile force directly to said coupling means, so as to prevent the transmission of the tensile force from taking place through the mechanics of the working organ. This member can for example be a fork 105 integral with said extension 58 of the finger 42 articulated on the first carriage 32 (cf. FIG. 4). During the extraction of the rod 54, the fork 105 then bears on a shoulder 106 of the coupling 102 mounted on the working member 100 to exert on the latter an axial thrust in the direction of extraction of the rod 54. It will be noted that in this position, the articulated finger 42 abuts against a bearing surface 108 of the first carriage 32. The carriage 104 is simply pushed in front of the first carriage 32. The working member 100 must not transmit no tensile force and serves only as a sliding support for the coupling means 102.

Une variante intéressante pour l'entraînement de l'organe de travail 100 est montrée sur les Figures 8 et 9. Sur la Figure 8 on voit que la fourche 105, solidaire du doigt 42 articulé sur le premier chariot 32, est bloquée par une tige transversale 132 dans une position verticale entre l'épaulement 106 à l'arrière de l'accouplement 102 et un second épaulement 130 à l'avant de l'accouplement 102. De cette façon la fourche 105 prend appui sur l'épaulement avant 130 pour entraîner l'organe de travail 100, lorsque le premier chariot 32 est déplacé vers l'avant de l'affût, dans la même direction, et sur l'épaulement arrière 106 pour pousser l'organe de travail 100 devant soi, lorsque le premier chariot est déplacé vers l'arrière de l'affût .An interesting variant for driving the working member 100 is shown in Figures 8 and 9. In Figure 8 we see that the fork 105, secured to the finger 42 articulated on the first carriage 32, is blocked by a rod transverse 132 in a vertical position between the shoulder 106 at the rear of the coupling 102 and a second shoulder 130 at the front of the coupling 102. In this way the fork 105 is supported on the front shoulder 130 for drive the working member 100, when the first carriage 32 is moved towards the front of the carriage, in the same direction, and on the rear shoulder 106 to push the working member 100 in front of you, when the first carriage is moved to the rear of the carriage.

Sur la Figure 8 on voit par ailleurs que l'accouplement 102 comprend une cage 134 solidaire avec une extrémité du châssis de l'organe de travail 100. Dans cette cage peut tourner librement un organe rotatif 136 solidaire d'une broche d'entraînement 138 de l'organe de travail 100. Cette cage 134 définit à l'avant, c'est-à-dire du côté de son extrémité libre, ledit épaulement 130, sur lequel prend appui la fourche 105 lors de l'entraînement de l'organe de travail 100 vers l'avant de l'affût. L'épaulement 106, sur lequel la fourche 105 prend appui lors de l'extraction de la tige, est quant à lui usiné dans l'organe rotatif 136, de façon à libérer la broche 138 de tout effort de traction lors du dégagement de la tige de perçage 54 du trou de coulée.In FIG. 8, it can also be seen that the coupling 102 comprises a cage 134 secured to one end of the chassis of the working member 100. In this cage can rotate freely a rotary member 136 secured to a drive spindle 138 of the working member 100. This cage 134 defines at the front, that is to say on the side of its free end, said shoulder 130, on which the fork 105 is supported during the drive of the working member 100 towards the front of the carriage. The shoulder 106, on which the fork 105 is supported during the extraction of the rod, is in turn machined in the rotary member 136, so as to release the spindle 138 from any tensile force when the release of the drilling rod 54 of the tap hole.

On notera que les moyens représentés sur la Figure 8 pour rendre solidaire la tige de perçage 54 de l'accouplement 102, comprennent un filet mâle 140, usiné dans l'extrémité libre de la tige de perçage 54, et un filet femelle correspondant, usiné dans l'extrémité avant de l'organe rotatif 136.Note that the means shown in Figure 8 to secure the piercing rod 54 of the coupling 102, include a male thread 140, machined in the free end of the piercing rod 54, and a corresponding female thread, machined in the front end of the rotary member 136.

Les Figures 10, 11, 12 et 13 montrent une variante utilisant pour l'extraction de la tige de perçage 54 une pince à mâchoires 150. Cette pince à mâchoires 150 est intégrée dans le premier chariot 32, sur lequel est articulé le doigt 42. On remarquera que la pince à mâchoires 150 doit être munie d'un canal de passage 152 pour la tige de perçage 54, qui est dimensionné de façon à permettre le passage desdits moyens de guidage lors de l'opération d'introduction de la tige de perçage 54 à l'aide du doigt 42 (voir Figures 10 et 11). De cette façon, la pince à mâchoires 150 peut rester en place sur le chariot 32 lors de l'opération d'introduction de la tige de perçage 54 dans la masse de bouchage. Lors de l'extraction de la tige de perçage 54, les moyens de guidage 68, 70 sont bien sûr écartés de la trajectoire de la pince, et le doigt 42 est rabattu vers le haut (cf. Figures 12 et 13). La tige peut maintenant être agrippée fermement par des paires de mâchoires 154 disposées le long dudit canal de passage 152.FIGS. 10, 11, 12 and 13 show a variant using for the extraction of the piercing rod 54 a jaw clamp 150. This jaw clamp 150 is integrated in the first carriage 32, on which the finger 42 is articulated. It will be noted that the jaw clamp 150 must be provided with a passage channel 152 for the piercing rod 54, which is dimensioned so as to allow the passage of said guide means during the operation of introducing the rod of drilling 54 using finger 42 (see Figures 10 and 11). In this way, the jaw clamp 150 can remain in place on the carriage 32 during the operation of introducing the piercing rod 54 into the plugging mass. During the extraction of the piercing rod 54, the guide means 68, 70 are of course spaced from the path of the clamp, and the finger 42 is folded up (see Figures 12 and 13). The rod can now be gripped firmly by pairs of jaws 154 disposed along said passage channel 152.

Les Figures 14, 15, 16 et 17 montrent une variante utilisant pour l'extraction de la tige de perçage 54 une pince 160 formée de deux crochets 162 et 164 juxtaposés et articulés tous les deux autour d'un axe transversal 166 dans ledit premier chariot 32. Avant de décrire l'opération d'extraction de la tige de perçage 54 à l'aide des deux crochets 162 et 164, on notera que le crochet 162 comporte à son extrémité inférieure un bourrelet 56', équivalent audit bourrelet cylindrique 56 du doigt 42. Ce bourrelet 56' peut pénétrer dans le canal de guidage 64 pour prendre appui sur l'extrémité libre de la tige de perçage 54 afin de pousser celle-ci dans la masse de bouchage. Le crochet 162 remplit en conséquence, lors de l'opération d'introduction de la tige de perçage 54 dans la masse de bouchage, le rôle du doigt 42 représenté sur les Figures 4 et 5. Sur la Figure 16, on voit par ailleurs que, pour l'opération d'introduction de la tige, les deux crochets 162 et 164 sont bloqués par une butée amovible 168 dans une position rabattue. Dans cette position, ledit bourrelet cylindrique 56' se trouve en alignement avec le canal de guidage 64, et le crochet 164 est complètement rabattu dans le premier chariot 32. La butée amovible 168 constitue en même temps un contre-appui pour le crochet 162, lorsque le bourrelet cylindrique 56' de ce dernier prend appui sur l'extrémité de la tige de perçage 54 pour exercer une poussée axiale sur cette dernière.Figures 14, 15, 16 and 17 show a variant using for the extraction of the piercing rod 54 a clamp 160 formed of two hooks 162 and 164 juxtaposed and articulated both about a transverse axis 166 in said first carriage 32. Before describing the operation of extracting the piercing rod 54 using the two hooks 162 and 164, it will be noted that the hook 162 has at its lower end a bead 56 ', equivalent to said cylindrical bead 56 of the finger 42. This bead 56 'can penetrate into the guide channel 64 to bear on the free end of the piercing rod 54 in order to push the latter into the blocking mass. The hook 162 consequently fulfills, during the operation of introducing the piercing rod 54 into the plugging mass, the role of the finger 42 shown in FIGS. 4 and 5. In FIG. 16, it can also be seen that , for the rod insertion operation, the two hooks 162 and 164 are locked by a removable stop 168 in a folded position. In this position, said cylindrical bead 56 ′ is in alignment with the guide channel 64, and the hook 164 is completely folded down in the first carriage 32. The removable stop 168 constitutes at the same time a counter-support for the hook 162, when the cylindrical bead 56 'of the latter bears on the end of the piercing rod 54 to exert an axial thrust on the latter.

Pour le dégagement de la tige de perçage 54, les moyens définissant le canal de guidage 64 sont rabattus (cf. Figure 14) et la butée amovible 168 est enlevée, de façon que les crochets 162 et 164 peuvent être engagés derrière un épaulement 170 solidaire de l'extrémité libre de la tige de perçage 54. On remarquera que le crochet 164 est bloqué dans cette position par une tige transversale amovible 172.For the release of the drilling rod 54, the means defining the guide channel 64 are folded down (see Figure 14) and the removable stop 168 is removed, so that the hooks 162 and 164 can be engaged behind a shoulder 170 integral of the free end of the piercing rod 54. It will be noted that the hook 164 is locked in this position by a removable transverse rod 172.

Un vérin pneumatique 174, solidaire du premier chariot 32 pousse le crochet 162 contre la tige de perçage 54 et ferme ainsi la pince 160 derrière l'épaulement 170. Le deuxième crochet 164 est poussé contre la tige transversale 172 qui sert en conséquence de contre-appui ou d'élément de réaction à la pince 160. On notera que les extrémités des deux crochets 162 et 164 ont avantageusement la forme de segments annulaires épousant circonférentiellement la tige de perçage 54, de façon à augmenter la surface de contact entre la pince 160 et la tige de perçage 54, et de réduire ainsi le risque d'arrachement de l'épaulement 170 lors du dégagement de la tige de perçage 54 du trou de coulée.A pneumatic cylinder 174, integral with the first carriage 32 pushes the hook 162 against the piercing rod 54 and thus closes the clamp 160 behind the shoulder 170. The second hook 164 is pushed against the transverse rod 172 which consequently serves as a counter support or reaction element to the clamp 160. It will be noted that the ends of the two hooks 162 and 164 advantageously have the shape of annular segments circumferentially matching the piercing rod 54, so as to increase the contact surface between the clamp 160 and the piercing rod 54, and thus reduce the risk of the shoulder 170 being torn off when the piercing rod 54 is released from the tap hole.

Pour pouvoir travailler sans canal de guidage 64, l'affût 10 comporte avantageusement un appui intermédiaire 110. Cet appui intermédiaire est constitué d'un crochet 112 monté sur un troisième chariot 114 coulissant à l'aide de deux paires de galets 116, 118 dans les mêmes rails 110, 112 que l'outil de travail 100 (cf. figures 6 et 7). Ce troisième chariot 114 est de préférence lié au premier chariot 32 par l'intermédiaire de deux tiges 120, 122 qui sont fixées au troisième chariot 114 et coulissent dans des douilles de guidage 124, 126 du premier chariot 32 et de l'organe de travail 100. Le but de ces tiges 120, 122 est de retirer automatiquement l'appui intermédiaire 110 de l'avant de l'affût vers le milieu de l'affût, c'est-à-dire de le mettre en sécurité avant que la tige de perçage 54 ne soit complètement retirée du trou de coulée. Cet appui intermédiaire 110 est utilisé pour supporter la tige de perçage retirée du trou de coulée. Ce même appui 110 peut cependant aussi être utile pour le montage/démontage d'un foret sur l'organe de travail. Lorsqu'on travaille avec le canal de guidage, le crochet 112 de l'appui intermédiaire 110 est avantageusement rabattu vers le haut afin de ne pas gêner la mise en place desdits moyens de guidage 68, 70. A cette fin le crochet 112 est monté sur le chariot 114 à l'aide d'une articulation cylindrique 128 et peut être immobilisé dans la position rabattue par une goupille 129, respectivement par un moyen équivalent.To be able to work without guide channel 64, the carriage 10 advantageously comprises an intermediate support 110. This intermediate support consists of a hook 112 mounted on a third carriage 114 sliding with the aid of two pairs of rollers 116, 118 in the same rails 110, 112 as the working tool 100 (cf. Figures 6 and 7). This third carriage 114 is preferably linked to the first carriage 32 by means of two rods 120, 122 which are fixed to the third carriage 114 and slide in guide bushings 124, 126 of the first carriage 32 and of the working member The purpose of these rods 120, 122 is to automatically remove the intermediate support 110 from the front of the carriage to the middle of the carriage, that is to say to put it in safety before the drilling rod 54 is not completely removed from the tap hole. This intermediate support 110 is used to support the piercing rod removed from the tap hole. This same support 110 can however also be useful for mounting / dismounting a drill bit on the working member. When working with the guide channel, the hook 112 of the intermediate support 110 is advantageously folded up so as not to hinder the positioning of said guide means 68, 70. To this end, the hook 112 is mounted on the carriage 114 by means of a cylindrical articulation 128 and can be immobilized in the folded position by a pin 129, respectively by equivalent means.

Un appui fixe 130 à l'avant de l'affût est de préférence un appui-écran du genre proposé dans la demande de brevet européen EP 0 064 644. Celui-ci comporte deux volets montés à l'avant de l'affût 10, c'est-à-dire en face du trou de coulée lorsque l'affût est en position opérative. Ces volets peuvent pivoter entre une position ouverte, facilitant la saisie de la tige de perçage 54 en vue du dégagement de celle-ci du trou de coulée et une position fermée, dans laquelle ils définissent un support de la tige 54 et un bouclier de protection contre les éclaboussures provenant du jet sortant du trou de coulée lors de l'ouverture de ce dernier.A fixed support 130 at the front of the mount is preferably a screen support of the type proposed in European patent application EP 0 064 644. This comprises two flaps mounted at the front of the mount 10, that is to say in front of the tap hole when the carriage is in the operative position. These flaps can pivot between an open position, facilitating the gripping of the piercing rod 54 with a view to releasing the latter from the taphole and a closed position, in which they define a support for the rod 54 and a protective shield. against splashing from the jet coming out of the tap hole when the latter is opened.

Il sera noté que la machine de perçage selon la présente invention peut aussi être réalisée avec d'autres moyens d'entraînement qu'un moteur hydraulique entraînant une chaîne sans fin. On peut par exemple utiliser différents types de vérins, entre autres un vérin télescopique ou un vérin de course C qui agit sur le chariot 32 par l'intermédiaire d'un multiplicateur de course pour le déplacer sur une distance 2C le long de l'affût. Un autre système d'entraînement possible est un système vis-écrou, dans lequel l'écrou est fixe en rotation et la vis qui s'étend le long de l'affût, est fixe en translation. Une rotation de la vis entraîne en conséquence la translation de l'écrou. Cet écrou peut directement supporter le doigt 42 ou bien entraîner le premier chariot 32 supportant le doigt 42.It will be noted that the drilling machine according to the present invention can also be produced with other drive means than a hydraulic motor driving an endless chain. One can for example use different types of cylinders, among others a telescopic cylinder or a stroke cylinder C which acts on the carriage 32 by means of a stroke multiplier to move it over a distance 2C along the carriage . Another possible drive system is a screw-nut system, in which the nut is fixed in rotation and the screw which extends along the mounting, is fixed in translation. A rotation of the screw consequently causes the translation of the nut. This nut can directly support the finger 42 or else drive the first carriage 32 supporting the finger 42.

Il est en effet évident que le doigt 42 ne doit pas nécessairement être monté sur un chariot 32 qui coulisse dans des rails dans le caisson 14 formant l'affût 10. Tout moyen de guidage permettant de maintenir le doigt 42 dans l'axe de la tige lorsqu'il est déplacé le long de l'affût est à considérer au sens de la présente invention comme un moyen parfaitement équivalent au système chariot/rails. Dans certains cas il est même parfaitement envisageable que le doigt 42 soit directement monté sur le moyen d'entraînement même. Dans ces cas il est parfaitement dans l'esprit de la présente invention d'assimiler audit premier chariot 32 les moyens utilisés pour rendre solidaire le doigt 42 dudit moyen d'entraînement. Au sens de la présente invention le terme "chariot" désigne, par conséquent, de façon la plus générale une pièce de machine qui supporte et déplace un autre élément de machine.It is in fact obvious that the finger 42 does not necessarily have to be mounted on a carriage 32 which slides in rails in the box 14 forming the mount 10. Any guide means making it possible to keep the finger 42 in the axis of the rod when moved along the carriage is to be considered in the sense of the present invention as a means perfectly equivalent to the carriage / rail system. In some cases it is even perfectly conceivable that the finger 42 is directly mounted on the drive means itself. In these cases, it is perfectly in the spirit of the present invention to assimilate to said first carriage 32 the means used to make the finger 42 integral with said drive means. Within the meaning of the present invention, the term "carriage" designates, therefore, most generally a machine part which supports and displaces another machine element.

Il sera aussi noté que l'exécution des moyens de guidage, telle que décrite ci-avant, n'est qu'une exécution préférentielle. Il est parfaitement possible de prévoir d'autres solutions qui permettent de définir un canal de guidage 64 de la tige métallique 54 coaxial à l'axe du trou de coulée et dans lequel le doigt 42 peut pénétrer pour pousser la tige 54 dans la masse de bouchage, sans pour autant s'écarter de l'enseignement de la présente invention. Il en est d'ailleurs de même des moyens de support pour supporter lesdits moyens de guidage.It will also be noted that the execution of the guide means, as described above, is only a preferential execution. It is perfectly possible to provide other solutions which make it possible to define a guide channel 64 of the metal rod 54 coaxial with the axis of the taphole and into which the finger 42 can penetrate to push the rod 54 into the mass of clogging, without departing from the teaching of this invention. It is also the same support means for supporting said guide means.

Claims (17)

Machine de perçage d'un trou de coulée dans une paroi d'un four à cuve par un procédé dans lequel, après avoir obturé le trou de coulée avec une masse de bouchage, on enfonce dans celle-ci, avant son durcissement complet, une tige et on extrait celle-ci, au moment voulu, en vue de l'ouverture du trou de coulée, ladite machine comprenant un affût (10) orientable devant la paroi du four à cuve dans une position de travail dans le prolongement de l'axe du trou de coulée, un premier chariot (32) déplaçable le long de cet affût (10), un moyen d'entraînement pour ledit premier chariot (32) entraînant ce chariot le long de cet affût (10), et ladite machine étant caractérisée
   par des moyens de guidage (68, 70) pour définir un canal de guidage (64) de la tige de perçage (54), lesdits moyens de guidage (68, 70) présentant au moins une ouverture longitudinale (78) donnant accès à l'intérieur du canal de guidage (64) perpendiculairement à l'axe de celui-ci,
   par des moyens de support (72, 74, 72', 74') desdits moyens de guidage (68, 70) sur l'affût (10), lesdits moyens de support étant conçus de façon que l'axe longitudinal du canal de guidage (64) soit coaxial à l'axe du trou de coulée lorsque l'affût (10) se trouve dans ladite position de travail devant la paroi du four à cuve pour enfoncer ladite tige métallique (54) dans le trou de coulée, et
   par un doigt (42) solidaire dudit premier chariot (32), ledit doigt étant dimensionné pour pénétrer à travers ladite ouverture longitudinale (78) à l'intérieur dudit canal de guidage (64) et pour pouvoir exercer une poussée axiale sur une extrémité de la tige de perçage (54) lors de l'avancement du premier chariot (32) en direction du trou de coulée.Machine for drilling a tap hole in a wall of a shaft furnace by a process in which, after having closed the tap hole with a plugging mass, a hammer is pressed into it, before its complete hardening rod and the latter is extracted, at the desired time, for the opening of the taphole, said machine comprising a mount (10) orientable in front of the wall of the shaft furnace in a working position in the extension of the taphole axis, a first carriage (32) movable along this carriage (10), drive means for said first carriage (32) driving this carriage along this carriage (10), and said machine being characterized
by guide means (68, 70) to define a guide channel (64) of the piercing rod (54), said guide means (68, 70) having at least one longitudinal opening (78) giving access to the inside the guide channel (64) perpendicular to the axis thereof,
by support means (72, 74, 72 ', 74') of said guide means (68, 70) on the carriage (10), said support means being designed so that the longitudinal axis of the guide channel (64) is coaxial with the axis of the taphole when the carriage (10) is in said working position in front of the wall of the shaft furnace to push said metal rod (54) into the taphole, and
by a finger (42) integral with said first carriage (32), said finger being dimensioned to penetrate through said longitudinal opening (78) inside said guide channel (64) and to be able to exert an axial thrust on one end of the piercing rod (54) during the advancement of the first carriage (32) in the direction of the tap hole. Machine selon la revendication 1, caractérisée en ce que lesdits moyens de support comprennent des bras (72, 72') articulés sur l'affût (10) de façon à pouvoir pivoter latéralement lesdits moyens de guidage (68, 70) en dehors d'un gabarit défini le long de l'affût (10).Machine according to claim 1, characterized in that said support means comprise arms (72, 72 ') articulated on the mount (10) so as to be able to pivot laterally said guide means (68, 70) outside a template defined along the carriage (10). Machine selon la revendication 1 ou 2, caractérisée en ce que ledit canal de guidage (64) de la tige de perçage (54) est défini par un tube (66) ayant un diamètre légèrement plus grand que celui de la tige de perçage (54) et étant muni d'au moins une fente longitudinale (78) traversant selon une génératrice radialement sa paroi sur toute sa longueur.Machine according to claim 1 or 2, characterized in that said guide channel (64) of the piercing rod (54) is defined by a tube (66) having a diameter slightly larger than that of the piercing rod (54 ) and being provided with at least one longitudinal slot (78) passing radially along its wall along its entire length. Machine selon la revendication 3, caractérisée en ce que ledit tube (66) est scindé longitudinalement en un premier et second segment de tube (68, 70), et en ce que lesdits moyens de support comprennent des premiers bras (72) articulés le long d'un premier côté latéral (16) de l'affût, qui supportent ledit premier segment de tube (68), et des seconds bras (72) articulés le long du côté latéral opposé (18) de l'affût, qui supportent ledit second segment de tube (70), lesdits premiers et seconds bras permettant de pivoter le premier segment de tube (68) et le second segment de tube (70) latéralement de l'affût (10) dans des directions opposées.Machine according to claim 3, characterized in that said tube (66) is split longitudinally into a first and second tube segment (68, 70), and in that said support means comprise first arms (72) articulated along a first lateral side (16) of the mount, which supports said first tube segment (68), and second arms (72) articulated along the opposite lateral side (18) of the mount, which support said second tube segment (70), said first and second arms pivoting the first tube segment (68) and the second tube segment (70) laterally from the mount (10) in opposite directions. Machine selon la revendication 2 ou 4, caractérisée par au moins un vérin (82, 84) actionnant lesdits moyens de support pour rabattre lesdits moyens de guidage dans une position latérale par rapport à l'affût (10).Machine according to claim 2 or 4, characterized by at least one jack (82, 84) actuating said support means for folding down said guide means in a lateral position relative to the carriage (10). Machine selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le doigt (42) solidaire du premier chariot (32) est pivotable autour d'un axe (46) perpendiculaire à la direction de déplacement dudit premier chariot (32), et en ce qu'une butée (60), qui est solidaire du premier chariot (32), constitue un contre-appui pour le doigt (42) lorsque ce dernier prend appui sur l'extrémité de la tige de perçage (54) pour exercer une poussée axiale sur cette dernière.Machine according to any one of claims 1 to 5, characterized in that the finger (42) integral with the first carriage (32) is pivotable about an axis (46) perpendicular to the direction of movement of said first carriage (32) , and in that a stop (60), which is integral with the first carriage (32), constitutes a counter-support for the finger (42) when the latter bears on the end of the piercing rod (54) to exert an axial thrust on the latter. Machine selon l'une quelconque des revendications 1 à 6, caractérisée en ce que ledit moyen d'entraînement comprend une chaîne sans fin (24) tendue le long de l'affût (10) et en ce que cette chaîne (24) est entraînée par un moteur hydraulique (30).Machine according to any one of Claims 1 to 6, characterized in that the said drive means comprises an endless chain (24) stretched along the carriage (10) and in that this chain (24) is driven by a hydraulic motor (30). Machine selon l'une quelconque des revendications 1 à 7, caractérisée par un organe de travail (100) coulissant sur et déplaçable le long de l'affût (10) et par des moyens pour accoupler ledit organe de travail (100) au moyen d'entraînement du premier chariot (32).Machine according to any one of claims 1 to 7, characterized by a working member (100) sliding on and movable along the carriage (10) and by means for coupling said working member (100) by means of drive of the first carriage (32). Machine selon l'une quelconque des revendications 1 à 8, caractérisée par des moyens pour dégager la tige de perçage (54) du trou de coulée qui comprennent des moyens pour accoupler l'extrémité de la tige de perçage (54) audit moyen d'entraînement.Machine according to any one of Claims 1 to 8, characterized by means for disengaging the piercing rod (54) from the tap hole which comprise means for coupling the end of the piercing rod (54) to said means. training. Machine selon la revendication 8, caractérisée en ce que l'organe de travail (100) est muni d'un moyen d'accouplement (102) permettant de transmettre un effort de traction à l'extrémité libre de la tige de perçage (54) engagée dans le trou de coulée, et en ce que ledit moyen d'entraînement est muni d'un appui prenant directement appui sur ledit moyen d'accouplement rendu solidaire de la tige de perçage (54) pour pousser l'organe de travail vers l'arrière de l'affût (10) et extraire de cette façon la tige de perçage (54) du trou de coulée.Machine according to claim 8, characterized in that the working member (100) is provided with a coupling means (102) making it possible to transmit a tensile force to the free end of the piercing rod (54) engaged in the taphole, and in that said drive means is provided with a support directly bearing on said coupling means made integral with the piercing rod (54) to push the working member towards the 'rear of the mount (10) and in this way extract the piercing rod (54) from the tap hole. Machine selon l'une quelconque des revendications 1 à 9, caractérisée par des moyens pour dégager la tige de perçage (54) du trou de coulée qui comprennent au moins un crochet s'engageant derrière un épaulement usiné dans l'extrémité de la tige (54).Machine according to any one of claims 1 to 9, characterized by means for releasing the piercing rod (54) from the tap hole which comprise at least one hook engaging behind a machined shoulder in the end of the rod ( 54). Machine selon l'une quelconque des revendications 1 à 11, caractérisée par un appui intermédiaire (110) coulissant sur et déplaçable le long de l'affût (10), qui permet de supporter une tige ou un foret de perçage en absence du canal de guidage (64).Machine according to any one of claims 1 to 11, characterized by an intermediate support (110) sliding on and movable along the mounting (10), which allows to support a rod or a drill bit in the absence of the channel guide (64). Machine selon la revendication 12, caractérisée en ce que l'appui intermédiaire comprend un crochet (110) monté sur un chariot (114) à l'aide d'une articulation cylindrique (128) de façon à pouvoir être rabattu.Machine according to claim 12, characterized in that the intermediate support comprises a hook (110) mounted on a carriage (114) using a cylindrical joint (128) so that it can be folded down. Machine selon l'une quelconque des revendications 1 à 13, caractérisée par un écran (130) monté à l'avant de l'affût en face du trou de coulée, ledit écran 130 étant constitué de volets pouvant pivoter entre une position ouverte facilitant la saisie de la tige de perçage (54) en vue du dégagement de celle-ci du trou de coulée et une position fermée dans laquelle ils définissent un support de la tige de perçage (54) à l'avant de l'affût et un bouclier de protection contre des éclaboussures de métaux en fusion.Machine according to any one of claims 1 to 13, characterized by a screen (130) mounted at the front of the carriage in front of the tap hole, said screen 130 consisting of flaps which can pivot between an open position facilitating the grip of the piercing rod (54) in order to disengage the latter from the tap hole and a closed position in which they define a support for the piercing rod (54) at the front of the carriage and a shield of protection against splashes of molten metal. Machine selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le premier chariot (32) comporte une pince (160) munie de deux crochets juxtaposés, qui sont pivotables autour d'un axe transversal et engageables derrière un épaulement (56) solidaire de l'extrémité de la tige de perçage (54), et au moins un vérin pneumatique (174), agencé entre le premier chariot (32) et un des deux crochets (162, 164), de façon à pouvoir fermer et ouvrir pneumatiquement la pince (160).Machine according to any one of claims 1 to 9, characterized in that the first carriage (32) comprises a clamp (160) provided with two juxtaposed hooks, which are pivotable around a transverse axis and can be engaged behind a shoulder (56 ) integral with the end of the piercing rod (54), and at least one pneumatic cylinder (174), arranged between the first carriage (32) and one of the two hooks (162, 164), so as to be able to close and pneumatically open the clamp (160). Machine selon la revendication 15, caractérisée en ce que le doigt (42) est constitué par un des deux crochets (162, 164) qui comporte un bourrelet (56') engageable dans le canal de guidage (64), et en ce que le premier chariot (32) est muni d'une butée amovible (168) formant, lors de l'opération d'introduction de la tige dans la masse de bouchage, un contre-appui pour le crochet (162) comportant le bourrelet (56').Machine according to claim 15, characterized in that the finger (42) consists of one of the two hooks (162, 164) which comprises a bead (56 ') which can be engaged in the guide channel (64), and in that the first carriage (32) is provided with a removable stop (168) forming, during the operation of introducing the rod into the plugging mass, a counter-support for the hook (162) comprising the bead (56 ' ). Machine selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le premier chariot comprend une pince (150) à mâchoires (154), et en ce que cette pince (150) est munie d'un canal de passage (152) pour la tige de perçage (54), ledit canal de passage (152) étant dimensionné de façon à permettre le passage desdits moyens de guidage lors de l'opération d'introduction de la tige de perçage (54) dans le trou de coulée à l'aide du doigt (42).Machine according to any one of Claims 1 to 9, characterized in that the first carriage comprises a clamp (150) with jaws (154), and in that this clamp (150) is provided with a passage channel (152 ) for the drilling rod (54), said passage channel (152) being dimensioned so as to allow the passage of said guide means during the operation introducing the piercing rod (54) into the taphole using the finger (42).
EP93108260A 1992-06-17 1993-05-21 Shaft furnace taphole piercing machine Expired - Lifetime EP0574729B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU88135A LU88135A1 (en) 1992-06-17 1992-06-17 Furnace taphole piercing device - drives rod into tap hole clay plug for later extraction to open the taphole
LU88167A LU88167A7 (en) 1992-06-17 1992-09-02 Machine for drilling a tap hole in a shaft furnace
LU88135 1992-09-02
LU88167 1992-09-02

Publications (2)

Publication Number Publication Date
EP0574729A1 true EP0574729A1 (en) 1993-12-22
EP0574729B1 EP0574729B1 (en) 1998-12-02

Family

ID=26640346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108260A Expired - Lifetime EP0574729B1 (en) 1992-06-17 1993-05-21 Shaft furnace taphole piercing machine

Country Status (14)

Country Link
US (1) US5351939A (en)
EP (1) EP0574729B1 (en)
JP (1) JPH0688111A (en)
KR (1) KR100253683B1 (en)
CN (1) CN1036209C (en)
AU (1) AU656472B2 (en)
CA (1) CA2098564A1 (en)
CZ (1) CZ283022B6 (en)
DE (1) DE4317436C2 (en)
ES (1) ES2125929T3 (en)
GB (1) GB2267956B (en)
PL (1) PL172793B1 (en)
RU (1) RU2094469C1 (en)
SK (1) SK59693A3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU88059A1 (en) * 1992-01-27 1993-08-17 Paul Wurth S.A. DRILLING MACHINE FOR A CAST HOLE OF A TANK OVEN
EP2415881B1 (en) * 2010-08-04 2013-12-25 TMT Tapping-Measuring-Technology GmbH Holding device for a drill rod of a tap hole drilling machine and method for removing a drill rod
JP5785838B2 (en) * 2011-09-27 2015-09-30 新日鉄住金エンジニアリング株式会社 Closed hole opening method and closed hole opening device
CN105903992B (en) * 2016-06-23 2021-12-14 中钢集团西安重机有限公司 Screw rod adjusting type drill rod clamping mechanism
WO2020182303A1 (en) * 2019-03-13 2020-09-17 Tmt Tapping Measuring Technology Sàrl Taphole plugging gun

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705630A (en) * 1955-04-05 Tad deo
DE3111260A1 (en) * 1981-03-21 1982-09-30 Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen STITCH HOLE DRILL
EP0064644A1 (en) * 1981-05-05 1982-11-17 Paul Wurth S.A. Guiding and positioning mechanism for the drill hammer of the taphole in a shaft furnace, and drilling device provided with this mechanism
GB2116898A (en) * 1982-02-03 1983-10-05 Wurth Paul Sa Device for coupling a shaft furnace tap hole drilling rod to the working tool of a drilling machine
GB2216827A (en) * 1988-04-06 1989-10-18 Wurth Paul Sa Taphole drilling machine
EP0379018A2 (en) * 1989-01-16 1990-07-25 Paul Wurth S.A. Process and device for opening the taphole of a shaft furnace
US5069430A (en) * 1990-10-26 1991-12-03 Woodings Industrial Corporation Blast furnace tap hole drill with centralizing drill rod support

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU86963A1 (en) * 1987-08-04 1989-03-08 Wurth Paul Sa DRILLING MACHINE FOR A TANK HOLE OVEN
LU87010A1 (en) * 1987-10-06 1989-05-08 Wurth Paul Sa DEVICE FOR MOUNTING A CLAMP FOR THE COUPLING OF A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO A DRILLING MACHINE
SU1633251A1 (en) * 1989-04-25 1991-03-07 Новолипецкий металлургический комбинат им.Ю.В.Андропова Apparatus for handling tap of electric furnace
KR950001904B1 (en) * 1991-06-17 1995-03-06 신닛뽄 세이테쯔 카부시키가이샤 Tap hole drilling machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705630A (en) * 1955-04-05 Tad deo
DE3111260A1 (en) * 1981-03-21 1982-09-30 Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen STITCH HOLE DRILL
EP0064644A1 (en) * 1981-05-05 1982-11-17 Paul Wurth S.A. Guiding and positioning mechanism for the drill hammer of the taphole in a shaft furnace, and drilling device provided with this mechanism
GB2116898A (en) * 1982-02-03 1983-10-05 Wurth Paul Sa Device for coupling a shaft furnace tap hole drilling rod to the working tool of a drilling machine
GB2216827A (en) * 1988-04-06 1989-10-18 Wurth Paul Sa Taphole drilling machine
EP0379018A2 (en) * 1989-01-16 1990-07-25 Paul Wurth S.A. Process and device for opening the taphole of a shaft furnace
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
GB9310794D0 (en) 1993-07-14
DE4317436C2 (en) 2002-07-18
CN1036209C (en) 1997-10-22
DE4317436A1 (en) 1993-12-23
AU656472B2 (en) 1995-02-02
CA2098564A1 (en) 1993-12-18
ES2125929T3 (en) 1999-03-16
CN1083114A (en) 1994-03-02
KR100253683B1 (en) 2000-04-15
PL299365A1 (en) 1994-01-10
CZ106693A3 (en) 1994-01-19
EP0574729B1 (en) 1998-12-02
RU2094469C1 (en) 1997-10-27
SK59693A3 (en) 1994-01-12
PL172793B1 (en) 1997-11-28
AU3996193A (en) 1993-12-23
GB2267956A (en) 1993-12-22
GB2267956B (en) 1996-01-03
US5351939A (en) 1994-10-04
CZ283022B6 (en) 1997-12-17
JPH0688111A (en) 1994-03-29

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