US3760992A - Rotary outlet valve for metallurgical ladles - Google Patents

Rotary outlet valve for metallurgical ladles Download PDF

Info

Publication number
US3760992A
US3760992A US00256147A US3760992DA US3760992A US 3760992 A US3760992 A US 3760992A US 00256147 A US00256147 A US 00256147A US 3760992D A US3760992D A US 3760992DA US 3760992 A US3760992 A US 3760992A
Authority
US
United States
Prior art keywords
valve part
rotary
stationary
rotary valve
outlet
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
US00256147A
Other languages
English (en)
Inventor
H Bieri
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3760992A publication Critical patent/US3760992A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • ABSTRACT An outlet valve for a metallurgical bottom-pour ladle with a rotary valve part, which is thrusted against a stationary valve part by a prestressed resilient ring surrounding the rotary valve part.
  • the reaction thrust of the resilient ring is supported by a ball or roller bearing.
  • the contact surface between the rotary valve part and the stationary valve part has preferably the form of a sphericalcalott.
  • the rotary valve part is movable about a vertical axis between an open and a closed position.
  • the rotating valve part is thrust resiliently against a stationary valve part by a prestressed spring whose reaction thrust is transmitted through a ball or roller bearing, or through a system of rollers, to a stationary bearing ring fixed by retaining parts to the bottom of the ladle.
  • FIG. 1 is a'vertical section through the bottom part of a ladle equipped with an outlet valve according to the invention
  • FIG. 2 is a vertical section through the bottom part of a ladle showing a different form of an outlet valve.
  • the bottom 1 of a bottom-pour ladle for containing molten metal has a depression 2 or cavity containing an outlet opening 3 substantially circular cross section.
  • the expression ladle is defined to also include intermediate vessels for hot metal charges.
  • the lower surface of the ladle bottom 1, which is made of firebrick or refractory lining, has a spherical depression into which is firmly bonded a stationary spherical calotte 4,
  • the contact surfaces 34 of the two spherical calottes 4 and 5 are smooth and precisely worked surfaces to ensure that they rest truly in contact with each other everywhere and to ensure that they can slide over each other easily during operation of the valve.
  • the two spherical calottes 4 and 5 are both made of a refractory material, for example a refractory brick.
  • the calottes 4, 5 are preferably moulded to the desired spherical shapes in a press and subsequently sintered.
  • valve plug 8 To the under surface of the tumable calotte 5 there is firmly bonded a valve plug 8, by means of an intermedaite bonding layer 11 of refractory mortar or the like. Through the valve plug 8 there passes, as shown in FIG. 1, a slightly curved outlet channel 9 for the hot metal melt.
  • the outlet channel 9 is substantially circular in cross section.
  • the valve plug 8 which consists of heat proof material is enclosed in a metal jacket 10.
  • the jacket 10, the plug 8 and the lower spherical calotte 5 together form the rotary valve part 28 which can be turned, when the valve is being operated, about a vertical axis of rotation 29. Due to the spherical contacting surfaces 34 of the two calottes 4 and 5 the rotary valve part 28 adapts itself in all directions in accordance with thermal expansions.
  • the two calottes 4 and 5 have openings or passages 6 and 7.
  • the two passages 6 and 7 coincide with each other so that a continuous outlet passage for the melt is formed.
  • the melt flows therefore through the openings 3, 6 and 7 and thereafter through the outlet channel 9.
  • the slightly curved longitudinal axis 24 of the outlet channel 9 terminates at its lower end offset of the vertical axis of rotation 29 of the rotary valve part 28.
  • the upper end of the outlet channel 9 is displaced to one side of the vertical axis of rotation 29 by a distance which is more than the radius of the outlet channel 9.
  • the rotary valve part 28 is turned about its vertical axis of rotation 29. This brings the opening 7 around into a position in which it no longer coincides with the opening 6, interrupting therefore the stream of melt.
  • the valve can also be so operated that the flow of melt can be controlled by only partly opening or closing the valve.
  • the lower, rotary spherical calotte 5 is thrust resiliently or springy up against the under surface of the stationary upper calotte 4 by an annular plate spring 12 or cup spring whose inner edge thrusts upwards along the whole circular inner periphery against a ring shoulder 30 of the metal jacket 10 of the valve plug 8.
  • the ringshaped spring 12 is secured by a plurality of screws 14, distributed around its periphery near the outer surface, to a rotary bearing ring 19. After prestressing the plate spring 12 by the screws 14 a certain amount of clearance remains between the bore of the plate spring 12 and the peripheral surface of the plug jacket 10 as well as between the lower side of the bearing ring 19 and the plate spring 12.
  • the outer periphery of the rotary bearing ring 19 has teeth so that the ring forms a sprocket wheel 20 for co-operating with a chain 46.
  • the rotary bearing ring 19 and the sprocket wheel 20 could be made of two parts secured to each other.
  • This anti-friction bearing 32 is arranged coaxially to the axis of rotation of the rotary valve part 28.
  • Driving connection is effected between the'rotary valve part 28 and the plate spring 12 through at least one driver pin 13 retained in a vertical slot or bore in the wall of the plug jacket 10.
  • the driver pin 13 engages with a certain amount of free play or clearance in a bore in the plate spring 12.
  • the plate spring 12 itself is connected which the rotary bearing ring 19 through at least one driver pin 15 projecting from the lower surface of the rotary bearing ring 19.
  • the driver pin 15 engages, with a certain amount of free play or clearance in a bore in the plate spring 12.
  • the arrangement allows the rotary valve part 28 a certain amount of idle movement relative to the ladle, to ensure that the two spherical calottes 4 and 5 are always thrust into true contact with each other in spite of thermal expans1on.
  • At least one dowel pin 23 ensures rigid engagement of the metallic retainer ring 17 with the button ring 25.
  • the rotary valve part can be driven in both directions by a motor 44 situated to one side of the valve. Drive motion is transmitted through a pinion 45 and a chain 46 which engages with the sprocket wheel 20.
  • the motor is preferably a compressed air or pneumatic motor driving through a reduction gear which forms a structural unit with the motor.
  • the motor 44 is fixed to the bottom plate 26 by screws or other fastening means. Rotation of the rotary valve part 28 is limited in the fully open and fully closed positions of the valve by mechanical limit stop means 33 and 42, extending from the sprocket wheel 20 and from the retainer ring 17.
  • the resilient supporting of the rotary valve part 28 with a certain prestressing force and a limited amount of free play ensure that the parts of the valve can adapt themselves extensively both to thermal expansions and to manufacturing tolerances. Consequently the rotary valve part 28 rotating easily relative to the stationary valve part.
  • the use of ball or roller bearing ensures that the rotary valve part operates with much less friction, compared to what is encountered in valves with plain sliding bearing. Therefore, comparatively little force need be applied for operating the valve, compared to hitherto known devices. This is a considerable advantage because the entire driving mechanism can be madesimpler and more compact.
  • FIGS. 1 Instead of a combined axial-radial thrust bearing as shown in FIGS. 1 which takes also the pull of the chain drive a separat bearing for supporting the radial and axial forces could be used.
  • the axes of these two passages at least approximately intersect the centres of the spherical calottes or, in other words, the axes of the passages 6 and 7 are directed at least approximately radially with reference to the spherical calottes 4, 5.
  • the radius of the spherical contact surface 34 is preferably three to five times the diameter of the outlet channel 9.
  • the radius of the curvature of the outlet channel 9 should be as great as practicable, to reduce abrasion of the wall of the outlet channel by the stream of metal melt.
  • the smallest radius of curvature of the outlet channel 9 is therefore more than eight times the diameter of the channel.
  • the curvature of the outlet channel 9 should be as little as possible to allow the channel 9 to be cleaned out from underneath as far up as the bottom of the ladle.
  • the channel 9 should be straight enough to allow a straight foundry lance of the like, of diameter one quarter of the channel diameter, to be pushed upwards through the channel as far as the interior of the ladle.
  • the longitudinal middle axis 24 of the channel 9, at the outlet end of the channel, is slightly off centre with respect to the axis of rotation 29 of the rotary valve part 28, these two axes forming an angle of 1 to 5 between them at the lower end of the rotary valve part.
  • the two axes can coincide at the outlet end of the channel 9.
  • the rotary ring 38 is in driving connection via the plate spring 12 through several driver pins 15 projecting from the lower face of the rotary ring 38 and engaging, with a certain amount of free play or clearance, in bores in the spring plate 12.
  • the free play allows the rotary valve part 28 a limited freedom, relative to the rotary ring 38 in all directions, for compensation of thermal expansions.
  • the rollers 37 rotate on needle roller bearings on bearing pins 39, fixed to the rotary ring 38, to minimize friction. Otherwise this valve according to FIG. 2 functions as already described in FIG. 1.
  • Outlet valve for bottom-pour ladles comprising a stationary valve part (4) and a rotary, movable valve part (28) each containing an outlet channel (6; 7, 9), said movable valve part (28) being rotatable by moving means (44, 45 46) between an open and closed position, prestressed resilient supporting means (12) for thrusting said rotary valve part (28) against said stationary valve part (4) in upward direction, said prestressed resilient means comprising a plate spring ring (12), the inner edge of said plate spring ring engaging a shoulder (30) of said rotary valve part (28) and being movable together with it, bearing means (32) comprising roller means (21, 37) and a stationary bearing ring (16, 35) surrounding said movable valve part (28), means (22, 40) for fixing said stationary bearing ring (16, 35) to a stationary bottom part 17) of the ladle,
  • roller means (21, 37) transmitting the reaction thrust of said prestressed resilient means (12) to said stationary bearing ring (16, 35).
  • Outlet valve according to claim 1 wherein the contact surfaces (34) between said rotary valve part (28) and said stationary valve part (4) are spherical calotte surfaces, the rotating axis (29) of said rotary valve part (28) being at least approximatley vertical.
  • Outlet valve according to claim 3 wherein the spherical calotte surfaces (34) are upwardly convex so that the center of the calotte will be below said contact surfaces (34).
  • outlet valve according to claim 3, wherein the outlet channel (9) in the rotary valve part (28) is slightly curved, the tangent to the longitudinal middle axis (24) of said outlet channel (9) near the contact surface (34) being directed approximately radially with respect to said calotte, and the lower end of said outlet channel (9) being off centre with respect to the axis (29) of said rotary valve part (28) and the axis (24) forming an angle of 1 to 5 between them.
  • Outlet valve according to claim 3 wherein the radius of the spherical calotte (S) at the sliding surface 34) is three to five times greater than the diameter of the outlet channel (9) in said rotary valve part (28) and the smallest radius of curvature of said outlet channel (9) is more than eight times greater than the diameter of the outlet channel (9) in said rotary valve part (28).
  • roller means are a plurality of conical rollers (37), said stationary bearing ring (35) having a sloping annular shoulder forming a track (36) for said conical rollers, said conical rollers (37) being rotatably supported by the rotary ring (38), said ring (38) being in driving connection with a plate spring (12) forming said resilient supporting means and said driving means (44, 45, 46) cooperating with said ring (38).
  • said prestressed resilient means is at least one cup spring (12), said bearing means (32) comprising further a rotary bearing ring (19), said cup spring (12) being axially spaced from said rotary bearing ring (19) and secured by a plurality of screws (14) distributed around its periphery to said rotary bearing ring (19), the securing means (15) allowing limited play in all directions between the rotary bearing ring (19) and the cup spring (12).
  • outlet valve according to claim 1, wherein said moving means comprises a chain sprocket wheel (20), said metallic ring (12) being secured to said chain sprocket (19, 20) wheel by a plurality of screws (14) distributed around its periphery.
  • Outlet valve for bottom-pour ladles comprising a stationary part (4) and a rotary valve part (28), each formed with an outlet channel (6; 7, 9), the contact surfaces (34) between said stationary valve part (4) and said rotary valve part (28) being spherical calotte surfaces, with the axis of rotation (29) of the rotary valve part being approximately vertical;
  • a chain sprocket wheel (20) drivingly connected to said movable part at the circumference of the calotte forming the movable part (28);
  • axial-radial thrust anti-friction bearing means (32) arranged co-axially to the axis of rotation of the rotary valve part (28) to form roller bearing means therefore;
  • roller means (21, 37) of the bearing means transmitting the reaction thrust of said resilient supporting means (12) to said stationary bearing ring (16, 35
  • outlet valve according to claim 10, wherein the resilient supporting means comprises an annularshaped spring means secured to the rotary valve part (28), and said sprocket chain wheel (20) is secured to the annular spring means (12) around the periphery thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)
  • Taps Or Cocks (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US00256147A 1971-06-09 1972-05-23 Rotary outlet valve for metallurgical ladles Expired - Lifetime US3760992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH838371A CH553610A (de) 1971-06-09 1971-06-09 Verschlusseinrichtung fuer die am boden angeordneten auslassoeffnungen von giesspfannen oder zwischenbehaeltern.

Publications (1)

Publication Number Publication Date
US3760992A true US3760992A (en) 1973-09-25

Family

ID=4339475

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256147A Expired - Lifetime US3760992A (en) 1971-06-09 1972-05-23 Rotary outlet valve for metallurgical ladles

Country Status (8)

Country Link
US (1) US3760992A (enExample)
AT (1) AT322753B (enExample)
CH (1) CH553610A (enExample)
DE (1) DE2226173A1 (enExample)
FR (1) FR2140597B3 (enExample)
GB (1) GB1367425A (enExample)
IT (1) IT959082B (enExample)
SE (1) SE375254B (enExample)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845943A (en) * 1973-10-26 1974-11-05 J Shapland Refractory pouring tube
US3912134A (en) * 1974-04-29 1975-10-14 Danieli Off Mecc Rotary sliding gate valve for molten metal
US3921866A (en) * 1973-10-16 1975-11-25 Ferdinando Palazzo Angularly movable obturator, particularly for controlling molten metal flow from containers or ladles
US4480771A (en) * 1979-05-25 1984-11-06 Stopinc Ag Rotary nozzle system for metallurgical vessels
US4577785A (en) * 1979-04-13 1986-03-25 Nippon Kokan Kabushiki Kaisha Hinged rotary nozzle
US4728012A (en) * 1985-03-26 1988-03-01 British Steel Corporation Outlet valves for melt containing vessels
US4840295A (en) * 1987-10-01 1989-06-20 Foseco International Limited Rotary pouring nozzle for a vessel for holding molten metal
US4905876A (en) * 1988-03-18 1990-03-06 Didier-Werke Ag Electromagnetically actuatable valve for a metallurgical vessel
US5027987A (en) * 1988-12-23 1991-07-02 Martin & Pagenstecher Gmbh Rotary valve closure for a container having a bottom discharge opening
US5038977A (en) * 1988-12-23 1991-08-13 Martin & Pagenstecher Gmbh Pair of refractory blocks for a rotary slide valve closure
DE4024351A1 (de) * 1990-07-27 1992-02-06 Mannesmann Ag Eingiesssystem zur einleitung einer schmelze
US5382003A (en) * 1992-12-08 1995-01-17 Sankaranarayanan; Ramani Flow control device for the suppression of vortices
ES2085200A2 (es) * 1991-01-18 1996-05-16 Foseco Int Boca de salida para recipientes de colada de metal fundido.
US5916471A (en) * 1998-11-10 1999-06-29 North American Refractories Co. Rotary socket taphole assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595815A (en) * 1978-03-21 1981-08-19 Vesuvius Int Corp Flow control device for molten metal
DE3403522A1 (de) * 1984-02-02 1985-08-14 Metacon AG, Zürich Feuerfeste verschleissteile fuer schieberverschluesse
JPH01143757A (ja) * 1986-12-20 1989-06-06 Didier Werke Ag 冶金容器用の回転摺動閉鎖装置およびこのような回転摺動閉鎖装置用の回転体
DE3731600A1 (de) * 1987-09-19 1989-04-06 Didier Werke Ag Drehschiebeverschluss fuer ein metallurigsches gefaess sowie rotor und/oder stator fuer einen solchen drehverschluss
BE1001778A3 (fr) * 1988-06-09 1990-03-06 Internat Ind Engineering S A Dispositif d'obturation a cle tournante.
GB2226263B (en) * 1988-12-22 1992-11-04 Steel Castings Res Valve for vessel outlet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE165292C (enExample) *
CH374454A (it) * 1959-06-15 1964-01-15 Fichera Ernesto Dispositivo per la colata di metalli fusi da un contenitore
US3511471A (en) * 1968-01-19 1970-05-12 Concast Inc Ladle stopper
DE1910247A1 (de) * 1969-02-28 1970-09-10 Neitzel Dipl Ing Martin Vorrichtung und Verfahren zum Abgiessen von metallurgischen Schmelzen und aehnlichen Produkten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE165292C (enExample) *
CH374454A (it) * 1959-06-15 1964-01-15 Fichera Ernesto Dispositivo per la colata di metalli fusi da un contenitore
US3511471A (en) * 1968-01-19 1970-05-12 Concast Inc Ladle stopper
DE1910247A1 (de) * 1969-02-28 1970-09-10 Neitzel Dipl Ing Martin Vorrichtung und Verfahren zum Abgiessen von metallurgischen Schmelzen und aehnlichen Produkten

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921866A (en) * 1973-10-16 1975-11-25 Ferdinando Palazzo Angularly movable obturator, particularly for controlling molten metal flow from containers or ladles
US3845943A (en) * 1973-10-26 1974-11-05 J Shapland Refractory pouring tube
US3912134A (en) * 1974-04-29 1975-10-14 Danieli Off Mecc Rotary sliding gate valve for molten metal
US4577785A (en) * 1979-04-13 1986-03-25 Nippon Kokan Kabushiki Kaisha Hinged rotary nozzle
US4480771A (en) * 1979-05-25 1984-11-06 Stopinc Ag Rotary nozzle system for metallurgical vessels
US4728012A (en) * 1985-03-26 1988-03-01 British Steel Corporation Outlet valves for melt containing vessels
US4840295A (en) * 1987-10-01 1989-06-20 Foseco International Limited Rotary pouring nozzle for a vessel for holding molten metal
US4905876A (en) * 1988-03-18 1990-03-06 Didier-Werke Ag Electromagnetically actuatable valve for a metallurgical vessel
US5027987A (en) * 1988-12-23 1991-07-02 Martin & Pagenstecher Gmbh Rotary valve closure for a container having a bottom discharge opening
US5038977A (en) * 1988-12-23 1991-08-13 Martin & Pagenstecher Gmbh Pair of refractory blocks for a rotary slide valve closure
DE4024351A1 (de) * 1990-07-27 1992-02-06 Mannesmann Ag Eingiesssystem zur einleitung einer schmelze
ES2085200A2 (es) * 1991-01-18 1996-05-16 Foseco Int Boca de salida para recipientes de colada de metal fundido.
US5603859A (en) * 1991-01-18 1997-02-18 Foseco International Limited Vessel outlet
US5382003A (en) * 1992-12-08 1995-01-17 Sankaranarayanan; Ramani Flow control device for the suppression of vortices
US5916471A (en) * 1998-11-10 1999-06-29 North American Refractories Co. Rotary socket taphole assembly

Also Published As

Publication number Publication date
DE2226173A1 (de) 1972-12-21
AT322753B (de) 1975-06-10
GB1367425A (en) 1974-09-18
SE375254B (enExample) 1975-04-14
FR2140597B3 (enExample) 1975-08-08
FR2140597A1 (enExample) 1973-01-19
IT959082B (it) 1973-11-10
CH553610A (de) 1974-09-13

Similar Documents

Publication Publication Date Title
US3760992A (en) Rotary outlet valve for metallurgical ladles
US5037017A (en) Horizontal or vertical rotary valve for a metallurgical vessel
CA1049482A (en) Double disc gate valve with entrapped stem connection
SU1732809A3 (ru) Металлургическа емкость с поворотным затвором, огнеупорные ротор и статор дл него
GB2198979A (en) Rotary sliding gate valves for metallurgical vessels
KR900007959B1 (ko) 슬라이딩 게이트 밸브
GB2133513A (en) Rotary sliding valves for molten materials
JPH01107952A (ja) 溶融金属用容器の回転流出ノズル
JPS591671B2 (ja) エレベ−タのドア開閉装置
US3685706A (en) Rotary valve for metallurgical vessels and the like
CA1270371A (en) Sliding gate valves for the outlet of metallurgical vessels
CA1242880A (en) Rotary sliding gate valves
US4272286A (en) Metallurgical vessel
CN215033576U (zh) 一种钢包滑动水口定位结构
US5027987A (en) Rotary valve closure for a container having a bottom discharge opening
US6379608B1 (en) Method for closing and opening a tapping hole of a metallurgical vessel
US4006773A (en) Centrifugally casting machine having an axial support device
WO1988005355A1 (en) Improvements relating to vessels for containing liquid
GB2149888A (en) Sliding gate valves
US5620627A (en) Discharge assembly and stator and rotor members thereof with two part construction
RU2623934C1 (ru) Кислородный конвертер для переработки чугуна и металлического лома с повышенным содержанием вредных примесей
JPH01262061A (ja) 浴融金属の排出装置
CN114929411A (zh) 用于冶金容器的滑动封闭件
AU653987B2 (en) Vessel outlet
SU933244A2 (ru) Шиберный ковшевой затвор