EP0445087B1 - Mit lateralen Andruckfedern ausgestatteter Schieberverschluss für metallurgische Gefässe - Google Patents

Mit lateralen Andruckfedern ausgestatteter Schieberverschluss für metallurgische Gefässe Download PDF

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Publication number
EP0445087B1
EP0445087B1 EP91830071A EP91830071A EP0445087B1 EP 0445087 B1 EP0445087 B1 EP 0445087B1 EP 91830071 A EP91830071 A EP 91830071A EP 91830071 A EP91830071 A EP 91830071A EP 0445087 B1 EP0445087 B1 EP 0445087B1
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EP
European Patent Office
Prior art keywords
plate
cover
slide
refractory
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91830071A
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English (en)
French (fr)
Other versions
EP0445087A2 (de
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
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Vesuvius Italia SpA
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Application filed by Vesuvius Italia SpA filed Critical Vesuvius Italia SpA
Publication of EP0445087A2 publication Critical patent/EP0445087A2/de
Publication of EP0445087A3 publication Critical patent/EP0445087A3/en
Application granted granted Critical
Publication of EP0445087B1 publication Critical patent/EP0445087B1/de
Anticipated expiration legal-status Critical
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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 aforesaid metal plates have a large central opening, of course.
  • 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.
  • French Patent Publication 2,247,302 refers to a box nozzle comprising a first fixed refractory plate, provided with a through orifice, and a second movable refractory plate, also with a through orifice, inserted in a metallic slide pivoting around a pin, to permit opening and closing of a passage, consisting in the through orifices, for liquid metal.
  • the slide rests on springs, to urge said movable refractory plate against said fixed refractory plate; the pin, however, allows the slide, and hence the moving refractory plate, to move only about the axis of the pin itself.
  • said means of connection must be such as to ensure precise, rapid and safe control by the operators.
  • US Patent 4,660,749 utilizes a slide resting on a set of fully preloaded springs.
  • a bracket is rotated around a hinged joint to bring said refractory plates into mutual contact, and then a nut, opposed to said hinged joint, is tightened.
  • the fixed and movable refractory plates contact each other only at the edges thereof closest to the hinged joint; the forces created by tightening of said nut are concentrated at said edges, thereby causing cracking or otherwise damaging thereof.
  • 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.
  • 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 rows 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 rows 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, urging the ensamble of tilting frame, slide and related refractory plate and nozzle against protruding strips of the cover; the ensamble is thus firmly kept in position, to prevent movable parts such as the slide from accidentally falling, and to avoid an excessive initial pressure between the refractory plates.
  • 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.
  • Such definitive compression causes the slide to be detached from said protruding strips, thus permitting the tilting frame to find its proper position and the fixed and movable refractory plates to be in perfect contact.
  • 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 (see Figs. 5 and 12) which is roughly rectangular in shape.
  • 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 62 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.
  • catch 14 does not support flange 23 when nuts 15 are tightened, since its 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 catch to the position illustrated in Fig.2.
  • Catch 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 along 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.
  • 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.
  • 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)

Claims (6)

  1. Schieberverschluß für metallurgische Gefäße (Gießpfannen) und dgl. des Typs, der umfaßt
    (i) eine feststehende obere Metallplatte (10), die am Boden (an der Unterseite) des metallurgischen Gefäßes (der Gießpfanne) befestigt ist und die schwenkbar trägt
    (ii) eine untere Metallplatte (20), hier als Abdeckung bezeichnet, die zwischen einer offenen Position unter einem etwa rechten Winkel zu der oberen Platte (10) und einer geschlossenen Position parallel zu und nahe bei der oberen Platte (10) drehbar (schwenkbar) ist und in der geschlossenen Position durch Bolzen (13) und Schraubenmuttern (15) festgehalten wird und für die Wartung des Schieberverschlusses von der oberen Platte (10) abnehmbar ist;
    (iii) eine dritte Metallplatte (60), hier als Schieber bezeichnet, die zwischen der oberen Platte (10) und der Abdeckung (20) und innerhalb der letzteren verschiebbar (gleitend), angetrieben durch eine Antriebseinrichtung (83), angeordnet ist;
    (iv) eine erste feuerfeste Platte (30), die ein durchgehendes Loch aufweist und in einer festen Position innerhalb der oberen Platte (10) festgehalten wird;
    (v) eine zweite feuerfeste Platte (70), die ein durchgehendes Loch aufweist und in einer festen Position innerhalb des Schiebers (60) und gleitend (verschiebbar) mit dem letzteren innerhalb der Abdeckung (20) festgehalten wird;
    wobei die zweite feuerfeste Platte (70) mit der ersten feuerfesten Platte (30) in Kontakt gebracht wird, wenn die Abdeckung (20) in der geschlossenen Position gegen die obere Platte (10) gedrückt wird, so daß in dieser geschlossenen Position der Schieber (60) gleitend herunterhängt auf eine Gruppe von Federanordnungen (40) und frei beweglich ist, wobei jede der genannten Federn dafür sorgt, daß die feuerfesten Platten (30) und (70) miteinander fluchten, wobei die einzige Verbindung zwischen dem Schieber (60) und der oberen feststehenden Platte (10) besteht durch den Gleitkontakt zwischen der feuerfesten Platte (70), die in den Schieber (60) eingeschoben ist, und der feuerfesten Platte (30), die in die obere feststehende Platte (10) eingeschoben ist, dadurch gekennzeichnet, daß an der oberen Oberfläche der Längsseiten der Abdeckung (20) Führungsschienen (63) befestigt sind und daraus in Richtung auf den Schieber (60) herausragen, wobei die genannten Schienen (63) in Kontakt und in Kooperation stehen mit den Kanten des Schiebers (60) und mit den Federanordnungen (40), die in die untere Oberfläche der Abdeckung (20) eingeschraubt sind, um den Schieber (60), den Kipprahmen (50) und die feuerfesten Teile (70, 71) an Ort und Stelle festzuhalten, wenn der Schieberverschluß um die Gelenke (11, 12) herum geöffnet wird, und die von den genannten Kanten nur entfernt werden, wenn die Schraubmuttern (15) festgezogen sind, wodurch ein Spielraum (120) geschaffen und die freie Bewegung des Schiebers (60) und des Kipprahmens (50) ermöglicht werden.
  2. Schieberverschluß nach Anspruch 1, dadurch gekennzeichnet, daß Paare von Führungsschienen (53, 62) mit den einander gegenüberliegenden Längsseiten des Schiebers (60) und des Kipprahmens (50) in Verbindung stehen.
  3. Schieberverschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Federanordnungen (40) jeweils aus einer Ansammlung von Beleville-Ringen (41) bestehen, die auf einen Stift (43) zwischen einer Flanschbuchse (42) und einer mit Gewinde versehenen Kappe (45) aufgesteckt sind, wobei jede mit einem Gewinde versehene Kappe (45) in ein mit Gewinde versehenes Loch (22) der Abdeckung (20) eingeschraubt ist, wobei eine Reihe dieser mit Gewinde versehenen Löcher (22) entlang der Längsseiten des Kipprahmens (50) ausgerichtet sind, auf dem jede der Flanschbuchsen (42) aufliegt.
  4. Schieberverschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß auf den Längsseiten der Abdeckung (20) Rohrleitungen (47) vorgesehen sind, in denen Druckluft transportiert wird, um die Federanordnungen (40) zu kühlen.
  5. Schieberverschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die obere Oberfläche der feststehenden feuerfesten Platte (30) und die untere Oberfläche der feuerfesten Platte (70) sowie die Seitenflächen beider Platten alle eine Metallplattierung aufweisen und daß eine Kupplung (71), ebenfalls aus feuerfestem Material, die unterhalb der verschiebbaren (gleitenden) feuerfesten Platte (70) angeordnet ist, ebenfalls metallplattiert ist und darüber hinaus durch einen Eisenring (82) geschützt ist, der als Träger für einen Wärmeschild (81) dient.
  6. Schieberverschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Abdeckung (20) in ihrer vollständig geschlossenen Position zuverlässig festgehalten wird durch ein schwenkbares Scharnier (14), das mittels Magneten (80) mit der Abdeckung (20) in Kontakt gehalten wird, wobei das Einführen des genannten Scharniers (14) in einen Schlitz (25) das korrekte Festziehen der Schraubenmuttern (15) auf den Bolzen (13) anzeigt.
EP91830071A 1990-03-02 1991-03-04 Mit lateralen Andruckfedern ausgestatteter Schieberverschluss für metallurgische Gefässe Expired - Lifetime EP0445087B1 (de)

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 EP0445087A2 (de) 1991-09-04
EP0445087A3 EP0445087A3 (en) 1992-04-29
EP0445087B1 true EP0445087B1 (de) 1998-06-03

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EP91830071A Expired - Lifetime EP0445087B1 (de) 1990-03-02 1991-03-04 Mit lateralen Andruckfedern ausgestatteter Schieberverschluss für metallurgische Gefässe

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EP (1) EP0445087B1 (de)
AT (1) ATE166815T1 (de)
DE (2) DE69129504T2 (de)
ES (1) ES2031795T3 (de)
IT (1) IT1240587B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE173967T1 (de) * 1992-09-28 1998-12-15 Vesuvius Italia Spa Mit lateralen torsionsstäbe ausgestatteter schieberverschluss für metallurgische gefässe
ATE390975T1 (de) * 2004-09-07 2008-04-15 Co Me Ca Costruzioni Meccanich Ausgabevorrichtung für den stahlguss u. ä.
CN110369700B (zh) * 2019-07-08 2021-07-09 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 (de) * 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.

Also Published As

Publication number Publication date
DE69129504D1 (de) 1998-07-09
EP0445087A2 (de) 1991-09-04
ES2031795T1 (es) 1993-01-01
IT9012435A0 (it) 1990-03-02
IT1240587B (it) 1993-12-17
ES2031795T3 (es) 1998-10-16
IT9012435A1 (it) 1991-09-02
ATE166815T1 (de) 1998-06-15
EP0445087A3 (en) 1992-04-29
DE69129504T2 (de) 1999-01-07
DE445087T1 (de) 1992-04-30

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