EP0445087A2 - Fermeture coulissante pour récipients de coulée, pourvue de ressorts de pression latérale - Google Patents

Fermeture coulissante pour récipients de coulée, pourvue de ressorts de pression latérale Download PDF

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Publication number
EP0445087A2
EP0445087A2 EP91830071A EP91830071A EP0445087A2 EP 0445087 A2 EP0445087 A2 EP 0445087A2 EP 91830071 A EP91830071 A EP 91830071A EP 91830071 A EP91830071 A EP 91830071A EP 0445087 A2 EP0445087 A2 EP 0445087A2
Authority
EP
European Patent Office
Prior art keywords
cover
ladles
slide
box nozzle
plate
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
EP91830071A
Other languages
German (de)
English (en)
Other versions
EP0445087B1 (fr
EP0445087A3 (en
Inventor
Giovanni C/O Nuova Sanac S.P.A. Timossi
Franco C/O Ilva S.P.A. Cecchi
Giancarlo C/O Ilva S.P.A. Martelli
Roberto Nuova Sanac S.P.A. Ricci
Massimo C/O Nuova Sanac S.P.A. Filippi
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.)
Vesuvius Italia SpA
Original Assignee
Ilva SpA
Nuova Sanac SpA
Vesuvius Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ilva SpA, Nuova Sanac SpA, Vesuvius Italia SpA filed Critical Ilva SpA
Publication of EP0445087A2 publication Critical patent/EP0445087A2/fr
Publication of EP0445087A3 publication Critical patent/EP0445087A3/en
Application granted granted Critical
Publication of EP0445087B1 publication Critical patent/EP0445087B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/40—Means for pressing the plates together

Definitions

  • the object of the present invention is a box nozzle with lateral pressure springs, for ladles.
  • Box nozzles have been used for several years for discharging ladle, tundishes and the like, stagewise, if desired.
  • Box nozzles consist basically of a pair of refractory plates, one fixed, the other movable, each with an orifice: relative movement of these two plates permits regulation of the size of the opening through which the liquid steel leaves the ladle.
  • Said pair of refractory plates is associated with a first refractory coupling positioned beneath the sliding plate and moving with it, and a second refractory coupling, positioned above the fixed refractory plate, inserted in the thickness of the refractory lining of the ladle, plus a third refractory coupling that surrounds it.
  • a support and movement device which generally includes:
  • the two refractory plates with orifices are suitably anchored, the fixed one to the lower face of the fixed upper metal plate, and the moving one to the upper face of the slide.
  • said means of connection must be such as to ensure precise, rapid and safe control by the operators.
  • box nozzle As the size of box nozzle increases, it becomes more and more difficult to achieve the above conditions simply and safely, guaranteeing good reliability.
  • the aim of the present invention is to overcome this difficulty.
  • an intermediate frame which tilts on two perpendicular axes lying in the plane of movement of the slide, is inserted between the slide and the cover. Inclination of said tilting frame is achieved by means of two lines of springs supported by the cover and parallel to the long sides thereof.
  • the long sides of the intermediate tilting frame rest on the two lines of springs.
  • the slide on which is mounted the sliding refractory plate runs in guides on top of the tilting frame.
  • the tilting frame can always keep the two counterposed faces of the fixed and movable refractory plates in perfect contact with one another.
  • the means of connection between the cover and the fixed upper refractory plate consist of bolts that are hinged at one end. Said bolts are tightened until the faces of said cover and said fixed upper metal plate are completely flush: hence the bolt-tightening operations call for no particular control by means of torque spanners, for example. However, the tightening operation is done last.
  • spring assemblies which protrude from the upper face of said cover, are inserted on the bottom of the cover through threaded holes.
  • the tilting frame is rested on the protuding ends of the spring assemblies and the moving slide is rested on top of this.
  • Two pairs of counterposed guide strips are placed between the tilting frame and slide.
  • the edges of the slide are then pushed towards the cover by means of a pair of counter-strips that are fixed to the cover by screws. Tightening the screws results in an initial compression of the spring assemblies.
  • the cover which is now equipped with springs, tilting frame and slide, is turned over against the fixed upper metal plate and is pressed against it by fully tightening the hinged bolts which connect the cover to the fixed upper plate.
  • the spring assemblies receive a second and definitive compression which ensures that the counterposed faces of the fixed and movable refractory plates are urged elastically against one another.
  • 10 indicates the fixed upper metal plate that is attached to the bottom of the ladle. Drilled hinge-pieces 11 and 12 are fixed to the longitudinal side of said plate. Hinged to these via pins are bolts 13 and catches 14.
  • Said fixed lower plate known as the cover, is actually formed of a robust quadrangular frame with variously-shaped internal longitudinal flanges 21 in each of which are two large threaded holes 22, and external longitudinal flanges 23.
  • the external flanges have notches 24 and 25 to permit the passage of bolts 13 and catches 14.
  • Spring assemblies 40 are inserted in holes 22.
  • the assemblies protrude from the upper face of cover 20 and provide elastic support for tilting frame 50 complete with seats 51 for the upper ends of the spring assemblies.
  • Tilting frame 50 is complete with a large central opening 52 which is roughly rectangular in shape.
  • guide strips 53 for slide 60 that also has a central opening 61, which is circular in shape, on the upper face of which there is a sliding refractory plate 70.
  • Fixed refractory plate 30 is mounted against the lower face 16 of the fixed upper plate.
  • Fixed upper refractory coupling 31 rests against said fixed refractory plate.
  • a small plate 80 which is attached to the upper face of a heat shield 81, connected to a ferrule 82 which surrounds and protects refractory coupling 71 that is attached to sliding plate 70.
  • guide strips 61 fixed to the long sides of slide 60, destined to run on guide strips 53 attached to tilting frame 50.
  • a third pair of strips 63 is fixed to the upper face of the long sides of cover 20 and, together with guide strips 53, ensures heightwise restriction of the movement of slide 60 which is moved by connecting shaft 83.
  • the third fixed refractory coupling 32 which surrounds coupling 31 and rests against the upper surface of levelling plate 33, is visible in Fig. 2.
  • Coupling 32 is surrounded by the inner refractory lining 35 of the ladle.
  • Fig.2 also illustrates the metal cladding 36 of fixed plate 30, as well as the metal claddings 72 and 73 of sliding refractory plate 70 and sliding coupling 71.
  • catches 14 do not support flange 23 when nuts 15 are tightened, since their function is to indicate to the operator that nuts 15 have been completely tightened: if this is not the case it is not possible to tilt the catches to the position illustrated in Fig. 2.
  • Catches 14 also provide a guarantee against accidental opening of bolts 13.
  • Fig.3 shows magnets 18 inserted in corresponding cavities of catches 14 and which act on the sides of cover 20 preventing the catches from turning outwards. It also illustrates the way spring assembly 40 supports tilting frame 50 on which slide 60 moves within guide strips 53 and 62.
  • Fig.4 illustrates in greater detail the Belleville washers 41 of assembly 40: the springs are inserted on flanged bush 42 which, in turn, is inserted on pin 43 that has a retaining ring 44 at one end while the other is screwed to a cap 45 whose outer cylindrical surface is threaded and screwed in ring 46 that is also threaded externally.
  • ring 46 is solely to create a wear thread on cover 20 and so, from the functional aspect, it can be considered to form an integral part of cover 20 in whose threaded holes 22 it is screwed by means of its external thread.
  • Spring assembly 41 formed of parts 41, 42, 43, 44 and 45, is screwed in hole 22, already equipped with ring 46, until it comes up against the outer flange of cap 45.
  • the spring assembly 40 can be fitted up with cover 20 in the open position illustrated in Fig.1 and, after this has been done, flanged bushes 42 rest against retaining rings 44 protruding from the inner face of cover 20.
  • tilting frame 50 In a second stage tilting frame 50 is rested against the ends 42 of spring assemblies 40. Subsequently slide 60 is rested on the frame. Slide 60 is attached to cover 20 by a pair of counter-strips 54 which - through screws - permit initial compression of spring assemblies 40.
  • clearance 120 (Fig.4) is nil owing to the thrust of the springs.
  • Fig.4 also clearly illustrates conduit 47 which carries cold air to springs 41 via minor passages 48.
  • Figs 6, 7 and 8 show the structural details of fixed upper metal plate 10 with recess 111 on its upper surface to receive the base of the third fixed refractory coupling 32, inserted into the ladle, as visible in Figs 3 and 4.
  • the entire fixed upper metal plate 10 is pierced by a circular hole 112 which - as can be seen from Figs 2 and 3 - serves for the passage of the lower end of fixed refractory coupling 31 which can be extracted from below, from the outside of the ladle.
  • the lower face of fixed upper metal plate 10 also has elongated recess 113 for housing fixed upper refractory plate 30.
  • grooves 114 On the bottom of recess 112 are grooves 114 to facilitate correct positioning of fixed upper refractory plate 30 which, as already mentioned, is metal clad on the top and the sides. The same metal cladding is also utilized to retain refractory plate 30 in recess 113 by means of cylindrical magnets housed in blind holes 118. Prevision is also made on the long flanks upper metal plate 10 for centring and positioning recesses 115 and 116 for fixed hinge-pieces 11 and 12 which are attached to said metal plate by screws that, for simplicity, are indicated in Fig.6 only by the symmetry axis.
  • Holes 117 in fixed upper metal plate 10 serve to fix it to ladle-bottom levelling plate 33 via screws.
  • sliding refractory plate 70 which, as already mentioned, is metal clad on the lower face and sides so as to permit the use of cylindrical magnets housed in circular holes 163 on the bottom of recess 162.
  • One end of slide 60 has threaded holes 164 for connecting to control shaft 83.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Springs (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP91830071A 1990-03-02 1991-03-04 Fermeture coulissante pour récipients de coulée, pourvue de ressorts de pression latérale Expired - Lifetime EP0445087B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1243590 1990-03-02
IT12435A IT1240587B (it) 1990-03-02 1990-03-02 Scaricatore a cassetto per siviere e simili, a molle di pressione laterale

Publications (3)

Publication Number Publication Date
EP0445087A2 true EP0445087A2 (fr) 1991-09-04
EP0445087A3 EP0445087A3 (en) 1992-04-29
EP0445087B1 EP0445087B1 (fr) 1998-06-03

Family

ID=11140132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830071A Expired - Lifetime EP0445087B1 (fr) 1990-03-02 1991-03-04 Fermeture coulissante pour récipients de coulée, pourvue de ressorts de pression latérale

Country Status (5)

Country Link
EP (1) EP0445087B1 (fr)
AT (1) ATE166815T1 (fr)
DE (2) DE69129504T2 (fr)
ES (1) ES2031795T3 (fr)
IT (1) IT1240587B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590174A1 (fr) * 1992-09-28 1994-04-06 VESUVIUS ITALIA S.p.A. Fermeture coulissante pour récipients de coulée pourvue de barres de torsion latérales
WO2006027804A1 (fr) * 2004-09-07 2006-03-16 Co.Me.Ca. Costruzioni Meccaniche Carpenteria S.P.A. Distributeur pour coulee d'acier et autres applications similaires
CN110369700A (zh) * 2019-07-08 2019-10-25 唐山不锈钢有限责任公司 一键式远程钢包车定位及自动摘盖加盖控制装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1004615B (it) * 1973-10-16 1976-07-20 Sirma Soc Italiana Otturatore con organo mobile azio nabile in movimento angolare parti colarmente per il controllo del flusso di metalli fusi da conteni tori o siviere
JPH0335481Y2 (fr) * 1984-09-11 1991-07-26
DE400256T1 (de) * 1989-06-02 1991-05-23 Ilva S.P.A., Genua/Genova Schieberverschluss fuer giesspfannen und aehnliche vorrichtungen.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590174A1 (fr) * 1992-09-28 1994-04-06 VESUVIUS ITALIA S.p.A. Fermeture coulissante pour récipients de coulée pourvue de barres de torsion latérales
WO2006027804A1 (fr) * 2004-09-07 2006-03-16 Co.Me.Ca. Costruzioni Meccaniche Carpenteria S.P.A. Distributeur pour coulee d'acier et autres applications similaires
CN110369700A (zh) * 2019-07-08 2019-10-25 唐山不锈钢有限责任公司 一键式远程钢包车定位及自动摘盖加盖控制装置

Also Published As

Publication number Publication date
ES2031795T1 (es) 1993-01-01
IT9012435A0 (it) 1990-03-02
ES2031795T3 (es) 1998-10-16
DE69129504T2 (de) 1999-01-07
DE445087T1 (de) 1992-04-30
DE69129504D1 (de) 1998-07-09
IT1240587B (it) 1993-12-17
ATE166815T1 (de) 1998-06-15
EP0445087B1 (fr) 1998-06-03
IT9012435A1 (it) 1991-09-02
EP0445087A3 (en) 1992-04-29

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