Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
  • B22D41/50—Pouring-nozzles
  • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

• the present invention relates to an improved device for supplying and exchanging a pouring tube for a metal pouring container from the bottom in which a movable closure plate and / or a replacement pouring tube attached to a movable plate is placed by a common transverse rim next to a movable plate carrying a pouring tube to be replaced or against a closure plate to be moved away from the tap hole, said replacement movable plague and that to be replaced being mounted neck ⁇ smoothing on guides capable of transmitting an upward thrust force and of guiding the displacement in translation of the plates and of the pouring tubes parallel to themselves under the action of a pneumatic cylinder in a direction perpendicular to the axis of the tap hole, from a loading position to a service position in the axis of the container tap hole and from the service position to a release position, d e so as to allow the exchange of the tube without lifting the container.
• Document EP-A-0192019 discloses a device for supplying and exchanging a pouring tube with a movable attached plate for a steel or metallurgical container which can be closed off at the bottom using a stopper or a sliding closure.
• the supply and exchange device comprises a movable refractory plate capable of sliding, under the action of a jack, along an upper reference plate, from a loading position to a service position or a closed position in alignment with the axis of a tap hole.
• Guide rails apply the movable plate, in sealed contact, against the upper reference plate under the effect of an upward thrust transmitted by a first end of levers on which act downwards at an opposite end of the helical springs taking support on the frame of the supply and exchange device.
• the guide rails are parallel to each other and form a slightly inclined plane at an angle of 5 to 10 ° relative to the reference plane.
• a double pneumatic cylinder ensures the linear displacement of the movable plate carrying the pouring tube.
• the replacement tube is brought by pivoting around a substantially horizontal axis in the mold or the mold well in order to allow the exchange of pouring tube without having to lift the distributor.
• the movable plate intended to slide along a rectilinear trajectory along the upper reference plate forms with respect thereto an inclined surface whose inclination is determined by the slope of the trajectory of the rails. guides.
• the infiltrated metal forms a crust which alters the flatness of the contact surfaces and risks causing the movable plate to jam and being a cause of non-sealing of a contact area of the two plates in the immediate vicinity of the pouring orifice.
• the present invention aims to overcome this drawback and proposes for this purpose a device which ensures the parallelism of the replacement movable plate with the upper reference plate, as soon as the tap hole is covered by said movable plate brought into the immediate vicinity of the pouring orifice by a pneumatic cylinder.
• the device for supplying and exchanging a pouring tube is of the type described in the first paragraph of this specification.
• This device is characterized in that it comprises means for imparting to the movable plate a tilting movement around a frontal horizontal edge of the movable plate engaged in the area adjacent to the pouring orifice, so as to make the movable plate strictly parallel to the underside of the upper plate.
• This tilting movement makes possible the sealed contact of the movable plate against the upper plate and prevents any leakage of liquid metal during the exchange of the pouring tube or when the pouring orifice is closed by a movable plate d shutter.
• the means intended to give the movable plate a tilting movement consist of a lever acting upwards on a rear part of the movable plate opposite the front edge engaged in the sealing zone surrounding the pouring hole of the reference plate.
• the lever is a portion of guide rail fixed by an end remote from the taphole to a rocker arm comprising, a crank articulated around a horizontal shaft, against which a piston pushed back by a helical spring as soon as the piston is released by a double pneumatic cylinder intended to slide a movable plate along the guide rails.
• the rocker arm comprises a first arm fixed in a direction normal to the surface of a cylindrical ring mounted on a horizontal shaft around which is wound a torsion spring fixed by a first end in the ring and by a second end in a fixed frame of the supply device, the ring being angularly displaced around the shaft against the spring under the action of the thrust exerted by the double jack on a second arm extending perpendicular to the first arm in a radial plane of the cylindrical ring.
• Figure 1 is an end view of a supply and exchange device according to the invention of a pouring tube disposed under a pouring container;
• Figure 2 is a side elevational view on a larger scale of the supply and exchange device shown in Figure 1 having a guide rail in the loading position;
• Figure 3 is a side elevation view similar to that of Figure 2 comprising a guide rail in the raised position;
• Figure 5 is a perspective view with partial arra ⁇ , of the supply and exchange device shown in Figure 2, provided with a first embodiment of a rocker arm according to the invention, shown in the low position waiting;
• Figure 6 is a perspective view of the device shown in Figure 1, the rocker having actuated the guide rail in the raised position;
• Figure 7 is an exploded perspective view of a second embodiment of a rocker arm according to the invention.
• Figure 8 is a partially cutaway perspective view of the rocker arm shown in Figure 5, occupying a low position
• Figure 9 is a perspective view similar to that of Figure 6, showing the rocker arm in the raised position.
• the same reference references designate identical or analogous elements.
• FIG. 1 shows a device for supplying and exchanging a pouring tube according to the invention, generally designated by the reference sign 1, mounted under a tapping distributor 5 in the vicinity of the tapping hole 7.
• the distributor can possibly already be fitted with a sliding closing device. Generally the shutter is simply a stopper (not shown).
• the device 1 is intended to allow the supply of a reserve pouring tube 2 compared to a movable plate 3, in the loading position 14, and the replacement of a worn tube 2 ′, related to a movable plate 3 ', in service position 14'. ( Figure 2)
• the seal between the internal nozzle 39 and the reference plate is ensured by a sealing collar 19.
• the upper reference plate 6 is optionally formed of several independent refractory elements.
• the refractory element surrounding the taphole is optionally provided, on a lower face, around a pouring orifice 27, with a groove 40 connected to a duct 41 for supplying argon.
• Two guide rails 9 have an inclined stroke relative to the reference plate 6.
• the guide rails 9 are divided into two fixed rail sections 9 ′ secured to a frame intended to be mounted under the tundish 5 in the vicinity of the tap hole 7 and three movable rail sections 9 "and disposed between the two respective fixed rail sections in their mutual extension.
• the sections of movable guide rails 9 "are each mounted at the end of a lever pivoting about an axis AA '. Each lever is subjected at its end opposite to the action of a spring 10 which pushes this opposite end down, apply the movable rail sections upwards.
• the slope of the guide rails 9 makes it possible to obtain a progressive tightening of the movable plate 3 of a pouring tube 2 against the upper reference plate 6 when any of the pouring tubes 2, 2 'is close to the taphole 7.
• This tightening decreases when the movable plate 3 deviates from it, allowing easy removal of the above-mentioned plate in the release position 17 e -l'au re side of the taphole 7.
• the movable plate 3 When the movable plate 3 is engaged in the sealing zone surrounding the tap hole 7, the movable plate 3 rests on the guide rails 9 and has a relatively small inclination relative to the upper reference plate 6 but sufficient to cause liquid metal to infiltrate between the upper reference plate 6 and the movable plate 3.
• the movable plate 3 however applied upwards against the upper reference plate 6, under the thrust of levers 12, 12 'each subjected to the action of springs 10, 10' mounted at a sufficient distance from the tap hole 7, to protect them from the intense heat of the molten metal, does not provide a perfect seal until the parallelism of the movable plate 3 with the upper reference plate 6 is not ensured.
• the linear displacement of the mobile plates 3, 3 ' is ensured by a retractable push rod 15 actuated by a pair of pneumatic jacks 16, 16' arranged in parallel in order to provide the force necessary to allow loading casting tube 2 quickly, making the best use of the small space available in height.
• the rods 11 and 11 'of the cylinders 16 and 16' are interconnected by a movable frame 13 carrying the retractable push rod 15.
• the frame 21 houses a cylindrical housing 22 in which is housed a helical spring 23 compressed under the action of a piston head 24 subjected to the thrust of the movable frame 13 which connects the rods of the double pneumatic cylinder 16, 16 'intended to slide a movable plate 3 along the guide rails from the loading position 14 to the service position 14 '.
• the double push cylinder 16, 16 'brought into the extended position moves the movable frame 13 which comes to bear against the head of the piston 24 of the rocker arm 20.
• the head of the piston 24 of the rocker arm 20 compresses the helical spring 23 in the housing 22 and allows an anneton 38 coupled to an elbow lever 26 to pivot about a horizontal axis HH 'and
• the device brings the movable plague 3 horizontally by raising the part of the movable plate furthest from the pouring orifice 27, immediately after having put in place the pouring tube 2 attached to the movable plague in the position of loading 14, before or during the moving plate
• the tilting movement has the advantage of making it possible to apply the movable plate 3 during translation under the action of the pneumatic cylinders 16, 16 ′, in leaktight manner against the upper reference plate 6 during the tube change. It makes it possible to prevent any leakage of liquid metal between the movable plague 3 and the upper reference plate 6 at the start of the tube change operation.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Continuous Casting (AREA)
• Treatment Of Steel In Its Molten State (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Basic Packing Technique (AREA)
• Furnace Charging Or Discharging (AREA)
• Carbon Steel Or Casting Steel Manufacturing (AREA)
• Making Paper Articles (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Devices For Dispensing Beverages (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
• Chutes (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=3884629

Family Applications (1)

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Cited By (1)

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• 1990
  • 1990-07-04 WO PCT/BE1990/000039 patent/WO1992000821A1/fr unknown
• 1991
  • 1991-06-20 BR BR919106616A patent/BR9106616A/pt not_active IP Right Cessation
  • 1991-06-20 AU AU79917/91A patent/AU650884B2/en not_active Ceased
  • 1991-06-20 WO PCT/BE1991/000039 patent/WO1992000822A1/fr active IP Right Grant
  • 1991-06-20 EP EP91911206A patent/EP0537195B1/de not_active Expired - Lifetime
  • 1991-06-20 CA CA002086532A patent/CA2086532C/en not_active Expired - Fee Related
  • 1991-06-20 DE DE69101782T patent/DE69101782T2/de not_active Expired - Fee Related
  • 1991-06-20 KR KR1019920703401A patent/KR0156228B1/ko not_active IP Right Cessation
  • 1991-06-20 ES ES91911206T patent/ES2051595T3/es not_active Expired - Lifetime
  • 1991-06-20 PL PL91297361A patent/PL168904B1/pl unknown
  • 1991-06-20 US US07/989,001 patent/US5351865A/en not_active Expired - Fee Related
  • 1991-06-20 JP JP3510507A patent/JP2991495B2/ja not_active Expired - Fee Related
  • 1991-06-20 RU RU92016562/02A patent/RU2060107C1/ru not_active IP Right Cessation
  • 1991-06-20 AT AT9191911206T patent/ATE104577T1/de not_active IP Right Cessation
  • 1991-06-28 CZ CS19911981A patent/CZ286982B6/cs not_active IP Right Cessation
  • 1991-06-29 CN CN91104532A patent/CN1046644C/zh not_active Expired - Fee Related
  • 1991-07-02 SI SI9111168A patent/SI9111168A/sl unknown
  • 1991-07-02 YU YU116891A patent/YU48510B/sh unknown
  • 1991-07-03 TR TR91/0674A patent/TR25322A/xx unknown
  • 1991-07-03 ZA ZA915170A patent/ZA915170B/xx unknown
  • 1991-07-04 AR AR91320090A patent/AR247125A1/es active
  • 1991-07-04 PT PT98213A patent/PT98213B/pt not_active IP Right Cessation
• 1992
  • 1992-12-22 FI FI925823A patent/FI96391C/fi active
• 1994
  • 1994-01-27 HR HRP-1168/91A patent/HRP940046B1/xx not_active IP Right Cessation

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