US3556360A - Gas stopper for a ladle - Google Patents

Gas stopper for a ladle Download PDF

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Publication number
US3556360A
US3556360A US3556360DA US3556360A US 3556360 A US3556360 A US 3556360A US 3556360D A US3556360D A US 3556360DA US 3556360 A US3556360 A US 3556360A
Authority
US
United States
Prior art keywords
nozzle
piston
passageway
gas
opening
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
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English (en)
Inventor
Thomas E Stelson
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.)
Nozzle Inc
Original Assignee
Nozzle Inc
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 Nozzle Inc filed Critical Nozzle Inc
Application granted granted Critical
Publication of US3556360A publication Critical patent/US3556360A/en
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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1226—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston the fluid circulating through the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4259—With separate material addition

Definitions

  • Compressed air raises the piston and nozzle to remove an extended top section of the nozzle from a mating surface on the nozzle seat and thereby opening a series of inclined passageways leading to a vertically disposed passageway in the nozzle.
  • An inert gas is introduced through the above-identified gap to lubricate the system and prevent molten metal from entering therein.
  • SHEE'I 3 BF 3 R m m V W Thomas E. Sfelson BY u/LM M M i 1% HIS ATTORNEYS separate cap 18 is merely a choice of design based upon cost and ease of fabrication ofthe respective units.
  • the gas operated piston assembly 5 is positioned outside of ladle 2 beneath the ladle bottom 7 and is mounted to nozzle seat 3.
  • the piston assembly 5 comprised of all metal parts, has an annular cylinder wall 24 having threads 25 at its upper end which cooperate with threaded recess 22 in the nozzle seat 3 to stationarily secure the assembly 5 thereto.
  • the wall 24 which extends completely around seat opening 13 and nozzle 12 has an inwardly disposed flange 26 around its inner surface 27 which serves as the upper limiting position for the piston.
  • the wall 24 has a lower section 28 extending perpendicular from the vertical section mounted to the seat 3 at the bottom thereof and toward the nozzle 12. Section 28 in turn has a downwardly extending section 39 perpendicular to section 28.
  • Piston 30 operates within the cylinder chamber 29.
  • Piston 30 is comprised of an annular shaft 33 which extends around nozzle 12 and an annular arm 32 which extends from the top of piston shaft 33 to the inner surface 27 of wall 24.
  • Shaft 33 completes the cylinder chamber 29 in which piston arm 32 acts as the piston head.
  • the bottom portion of piston shaft 33 has threads 31 which cooperate with lower threads 23 of nozzle 12 to secure the piston 30 to the nozzle 12.
  • the piston shaft 33 and arm 32 are dimensioned so that the end of outwardly extending arm 32 slides along inner surface 27 of wall 24 which forms the inner cylinder wall.
  • the stroke of the piston is limited at its upper end by flange 26 of wall 24 and is limited at its lower end by the extending lower section 28 of wall 24.
  • the piston shaft 33 slides against the downwardly extending wall section 39.
  • a threaded, compressed air inlet 34 positioned near the bottom of wall 24 leads into passageway 35 which extends completely through the lower section 28 of wall 24 and into the cylinder chamber 29.
  • An adjustable needle valve 36 is positioned in passageway 35 and extends out of lower section 28 to control the air input into cylinder 29.
  • Two sealing rings 37 are secured to arm 32 to prevent leakage of the compressed air in cylinder 29 as arm 32 slides along inner wall 27.
  • Two similar sealing rings 38 are recessed in the end of extended wall section 39 to provide an adequate seal between section 39 and sliding piston shaft 33.
  • the piston shaft 33 has a vertical inert gas passageway 40 leading vertically through the bottom section of the piston shaft 33 and continuing as recess 41 along the surface of shaft 33 which faces nozzle 12. Gap between the nozzle 12 and nozzle seat 3 also extends downwardly between the piston shaft 33 and the nozzle 12. Therefore, passageway 40 which leads into recess 41 communicates with gap 45. Passageway 40 has inlet means 42 extending through the bottom of downwardly extending portion 33 of piston 30. A lock bolt 43 extends through downwardly extending wall portion 39 to lock the piston shaft 33 against wall 39 in the closed position when the ladle is being filled.
  • FIG. 1 The operation of my gas stopper shown in FIG. 1 is as fol lows: while the ladle is being filled with molten metal, the nozzle is in the closed position, as shown in FIG. 4, for a slightly different embodiment of my invention.
  • the bottom seating surface 21 of cap 18 In the closed position, the bottom seating surface 21 of cap 18 is in intimate contact with eating lip 16 of nozzle seat 3. This completely shuts off passageways 19 from the molten metal in the ladle.
  • the weight of the molten metal on cap 18, gravity acting on nozzle 12 and lock bolt 43 all insure that nozzle 12 remains in the closed position.
  • lock bolt 43 is loosened and compressed air is fed through passageway 35 into cylinder chamber 29.
  • inert gas passageway 40 is opened. This causes the inert gas such as argon to flow upwardly into gap 45, The pressure of the inert gas is maintained sufficiently high to prevent any molten metal from entering gap 45. The inert gas then bubbles into the molten metal. If the inert gas system is operated when the nozzle 12 is in the closed position, the inert gas enters recess 44, the excess space about the lower surface of nozzle seat 3, and exerts pressure on the top of piston arm 32 to help maintain the nozzle assembly 4 in the closed position. 1
  • inert gas such as argon
  • the inert gas such as argon passing through gap 45 acts as a lubricant to permit easy movement of nozzle 12. It is also recognized that bubbling an inert gas through molten metals such as steel has many beneficial effects such as purging the steel by acting as nucleation sites for removing other entrapped gases in the molten metal.
  • the gap 45 also permits uninhibited expansion and contraction of the various members whose surfaces define the gap.
  • FIG. 4 Another embodiment of my invention is shown in FIG. 4. The only modification in this embodiment is in the gas operated piston assembly.
  • the cylinder chamber 53 is formed of four separate annular metal walls.
  • the top ofchamber 53 is defined by annular shaped wall 46 which has threads 25' at its upper end to cooperate with recessed threaded section 22' of nozzle seat 3 to secure the cylinder chamber 53 to the nozzle seat 3.
  • the annular vertical walls 47 and 48 both of which are welded to wall 46 form the outer and inner sidewalls respectively of chamber 53.
  • Base wall 49 which is welded to outer wall 47 forms the bottom of cylinder chamber 53.
  • the inner wall 48 has its outer surface aligned with wall 46 and nozzle seat 3' to define the opening for the nozzle 12 and the resultant gap 45
  • the piston 30' has an additional surface of the chamber 53 to slide on, namely, inner wall 48 and therefore, additional seal rings 50 are positioned in wall 48 to maintain the adequate seal.
  • Threaded, compressed air inlet 34' extends through sidewall 47 and base wall 49 and leads into passageway 35' which exits into chamber 53 below piston arm 32'.
  • a similar compressed air passageway 51 in wall 46 exits into chamber 53 above piston arm 32 from compressed air inlet 52 which extends through the upper part of wall 47 and wall 46.
  • FIGS. 5 and 6 A further embodiment of my invention is shown in FIGS. 5 and 6.
  • the nozzle itself is stationary, and a refractory piston operating within a chamber in the nozzle wall opens and closes the passageways leading from the ladle into the central nozzle opening.
  • a refractory cap 60 is permanently positioned above the nozzle opening 61 of nozzle 62 by securing it within the ladle 2 on the ladle bottom.
  • Cap 60 has annular sides 63 which act as the nozzle seat and which completely fill the annular nozzle well 64. Again, a cementitious refractory (not shown) can be rammed between sides 63 and nozzle well 64 to secure the block in place.
  • Nozzle 62 having a tubular wall 65 is positioned in the opening in the bottom of the ladle 2' and is held in place by both the nozzle plate 67 bolted to the bottom side 68 of the ladle 2' by bolts 69 and the nozzle seat sides 63.
  • the passageway 61 of the nozzle 62 vertically extends completely therethrough.
  • Cap 60 has'three equally spaced passageways 71 leading through the cap to an opening 72 directly above the opening 61 of nozzle 62 and which is defined by the space between the convexly curved inner bottom surface 70 of cap 60 and upper surface 74 of nozzle 62. v
  • a vertically disposed annular-chamber 73 extends within the tubular wall 65 of nozzle 62 from upper nozzlesurface 74 to a 'point in the nozzle which is below the bottom side 68 of the ladle.
  • a compressed inert gas inlet 75 and connecting passageway 76 communicates with the bottom of chamber 73.
  • a second inert gas inlet 78 andconnecting passageway 79 communicate withchamber 73 about midway between its ends and just below the bottom side 68 of the ladle.
  • An annular refractory piston 80 having a length substantially equal to the depth of chamber 73 is loosely fitted in chamber 73 to fonn a gap 77 therebetween.
  • Piston 80 has a small recess 81 at its bottom end which communicates with passageway 76 and a second larger recess 82 which is intermediate the piston ends and communicates with passageway 79.
  • the upper surface 83 of piston 80 is sloped toward nozzle passageway 61 to mate with the convex surface 70 of cap 60.
  • argon isintroduced through passageway 79 into recess 82 simultaneously as the flow of argon is decreased from passageway 76.
  • the increase and decrease of argon flow in the respective chambers is synchronized to maintain a sufficient flow of argon in the gap 77 to prevent any molten metal from getting g therein. As in the other embodiments, this argon escapes into the molten metal.
  • a gas operated stopper for a pouring ladle comprising:
  • a noule seat having a central opening and adaptedto be secured inia nozzle well-of the ladle;
  • v B. A nozzle assembly positioned within the opening in the nozzle seatandhaving a central opening therein, at least a portionof the nozzle assembly being movable into and outof contact with the nozzle seat;
  • a gas actuated piston member associated with the nozzle assembly said piston formingthe movable portion of the nonle assembly into and out of contact with the nozzle seat to open and close the passageway between them whereby the flow of liquids is regulated; and p E.
  • a second passageway surrounding the movable portion of the nozzle assembly providing a channel for the flow of inert gas to lubricate said moving member.
  • a gas operated stopper for a pouring ladle comprising:
  • a nozzle seat adapted to be secured in a nozzle well of the ladle and having a central opening therethrough and a seating surface surrounding the central opening;
  • a movable nozzle assembly having:
  • a tubular body portion having a vertically disposed opening therethrough and positioned in the opening in the nonle seat and having cross section smaller than the opening to provide a gap between the seat and the body portion of the nozzle assembly;
  • cap portion on top of the tubular body portion having a cross section larger than the cross section of the body portion and having a seating surface surrounding the body portion positioned to mate with the seating surface on the nozzle seat;
  • a piston assembly having:
  • a piston mounted for movement within the cylinder and secured to the movable nozzle. Fluid entering the cylinder through said fluid passageway raises the piston and nozzle, separating said seating surfaces and permitting liquid to flow from the ladle through the passageway in the tubular body portion of the nozzle and through the nozzle opening; and D. An inlet connecting with thegap for supplying inert gas thereto, said inert gas lubricating the system and preventing molten metal from entering therein. 2
  • the gas stopper of claim 2 wherein the cap portion is a separate refractory cap secured tothe upper section of the 6.-
  • the gas passageway communicates with the cylinder at substantially the top thereof, whereby fluid forces the piston and connected nozzle downwardly so that the seating surface of the cap portion of the nozzle assembly mates with the seating surface of the nozzle seat.
  • a piston shaft of the piston forms the outer surface of the cylinder which parallels the nozzle and is axially aligned with that portion of the nozzle seat defining the nozzle seat central opening.
  • a lock bolt extends through a lower section of the cylinder and is adaptable to contacting the piston shaft to prevent movement of the piston in the cylinder.
  • An annular refractory piston loosely positioned in said chamber to form a gap therebetween said piston having an upper surface adapted to mate with an inner surface of the cap and a first and second recess.
  • the first recess communicating with the first gas passageway and the second the cap is convexly shaped to mate with the upper surface of the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US3556360D 1969-01-15 1969-01-15 Gas stopper for a ladle Expired - Lifetime US3556360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79143769A 1969-01-15 1969-01-15

Publications (1)

Publication Number Publication Date
US3556360A true US3556360A (en) 1971-01-19

Family

ID=25153726

Family Applications (1)

Application Number Title Priority Date Filing Date
US3556360D Expired - Lifetime US3556360A (en) 1969-01-15 1969-01-15 Gas stopper for a ladle

Country Status (7)

Country Link
US (1) US3556360A (enrdf_load_stackoverflow)
BE (1) BE744032A (enrdf_load_stackoverflow)
DE (1) DE1962940A1 (enrdf_load_stackoverflow)
FR (1) FR2028350A1 (enrdf_load_stackoverflow)
GB (1) GB1222640A (enrdf_load_stackoverflow)
LU (1) LU60147A1 (enrdf_load_stackoverflow)
NL (1) NL7000436A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651825A (en) * 1969-10-24 1972-03-28 Francis P Sury Stopper plug valve for hot metal ladles
US3726305A (en) * 1971-11-26 1973-04-10 Dow Chemical Co Transfer line and valve assembly combination for handling molten liquids
US3802683A (en) * 1972-04-08 1974-04-09 Dyson Ltd J & J Containers for molten metal
US4200210A (en) * 1977-09-16 1980-04-29 Voest-Alpine Aktiengesellschaft Rotary slide closure
US4325401A (en) * 1978-09-28 1982-04-20 Kagome Co., Ltd. Aseptic valve
US4552334A (en) * 1984-03-28 1985-11-12 Kawasaki Steel Corporation Flow change-over valve for the blowing of fluids into molten metal vessel
US4944497A (en) * 1988-03-23 1990-07-31 Radex-Heraklith Industriebeteilgungs Ag Flushing block
US5106106A (en) * 1988-11-17 1992-04-21 Didier-Werke Ag Sealing structure for use in guiding molten metal from a metallurgical vessel and a seal thereof
US5316271A (en) * 1989-06-01 1994-05-31 Shinagawa Refractories Co., Ltd. Discharge regulator of molten metal
EP1174671A3 (de) * 2000-07-13 2002-07-24 SMS Demag AG Metallurgisches Gefäss, insbesondere Elektrolichtbogenofen, das beim Abstechen der Metallschmelze in senkrechter Gefässlage steht

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1379179A (en) * 1972-04-17 1975-01-02 British Iron Steel Research Apparatus for pouring molten metal
JPS49110015U (enrdf_load_stackoverflow) * 1973-01-16 1974-09-19
BE1004121A6 (fr) * 1990-05-04 1992-09-29 Lahaut Hugues Dispositif pour la coulee d'un metal et procede d'utilisation de ce dispositif.
DE10062742A1 (de) * 2000-12-15 2002-06-20 Fischer Georg Automobilguss Vorrichtung zum Verschliessen eines Giessgefässes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791814A (en) * 1954-04-20 1957-05-14 Villela Oscar Ladle nozzle and stopper construction
US2863189A (en) * 1958-02-03 1958-12-09 Harold S Beck Ladle nozzle construction
US3354939A (en) * 1964-07-17 1967-11-28 Calderon Automation Inc Apparatus for handling molten metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791814A (en) * 1954-04-20 1957-05-14 Villela Oscar Ladle nozzle and stopper construction
US2863189A (en) * 1958-02-03 1958-12-09 Harold S Beck Ladle nozzle construction
US3354939A (en) * 1964-07-17 1967-11-28 Calderon Automation Inc Apparatus for handling molten metal

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651825A (en) * 1969-10-24 1972-03-28 Francis P Sury Stopper plug valve for hot metal ladles
US3726305A (en) * 1971-11-26 1973-04-10 Dow Chemical Co Transfer line and valve assembly combination for handling molten liquids
US3802683A (en) * 1972-04-08 1974-04-09 Dyson Ltd J & J Containers for molten metal
US4200210A (en) * 1977-09-16 1980-04-29 Voest-Alpine Aktiengesellschaft Rotary slide closure
US4325401A (en) * 1978-09-28 1982-04-20 Kagome Co., Ltd. Aseptic valve
US4552334A (en) * 1984-03-28 1985-11-12 Kawasaki Steel Corporation Flow change-over valve for the blowing of fluids into molten metal vessel
US4944497A (en) * 1988-03-23 1990-07-31 Radex-Heraklith Industriebeteilgungs Ag Flushing block
US5106106A (en) * 1988-11-17 1992-04-21 Didier-Werke Ag Sealing structure for use in guiding molten metal from a metallurgical vessel and a seal thereof
US5316271A (en) * 1989-06-01 1994-05-31 Shinagawa Refractories Co., Ltd. Discharge regulator of molten metal
EP1174671A3 (de) * 2000-07-13 2002-07-24 SMS Demag AG Metallurgisches Gefäss, insbesondere Elektrolichtbogenofen, das beim Abstechen der Metallschmelze in senkrechter Gefässlage steht

Also Published As

Publication number Publication date
DE1962940A1 (de) 1970-07-23
NL7000436A (enrdf_load_stackoverflow) 1970-07-17
FR2028350A1 (enrdf_load_stackoverflow) 1970-10-09
BE744032A (fr) 1970-06-15
LU60147A1 (enrdf_load_stackoverflow) 1970-03-09
GB1222640A (en) 1971-02-17

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