US3850351A - Sliding nozzle assembly - Google Patents

Sliding nozzle assembly Download PDF

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Publication number
US3850351A
US3850351A US00441510A US44151074A US3850351A US 3850351 A US3850351 A US 3850351A US 00441510 A US00441510 A US 00441510A US 44151074 A US44151074 A US 44151074A US 3850351 A US3850351 A US 3850351A
Authority
US
United States
Prior art keywords
plate
sliding
retaining plate
lower retaining
nozzle
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
US00441510A
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English (en)
Inventor
T Yoshihara
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.)
JFE Engineering Corp
TYK Corp
KOKANKIKAI KOGYO KK
Original Assignee
Nippon Kokan Ltd
TYK Corp
KOKANKIKAI KOGYO KK
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 Nippon Kokan Ltd, TYK Corp, KOKANKIKAI KOGYO KK filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3850351A publication Critical patent/US3850351A/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
    • 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
    • B22D41/26—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 characterised by a rotatively movable plate

Definitions

  • the known sliding nozzle assembly mounted to the bottom plate of metallurgical vessel such as a ladle or a tundish comprises a top nozzle, a stationary plate, a sliding plate and a collector nozzle.
  • said stationary plate of the prior art is divided into two parts upper one of which is an upper retaining plate and lower one of which is an lower retaining plate having a plurality of running openings.
  • the present nozzle assembly further comprises a sliding plate corresponding to the sliding plate in the conventional device provided under the lower retaining plate, a collector nozzle provided under the sliding plate and driving means for rotating the lower retaining plate and the sliding plate independently of each other, whereby to ensure a long life for the sliding nozzle assembly and prevention of any trouble due to leakage of molten steel from each contact surface of the plates.
  • the present invention relates to a sliding nozzle assembly mounted in the bottom plate of a metallurgical vessel such as a ladle or tundish and adapted to function as a molten steel feeding mechanism.
  • a known mechanism of this type comprises a stationary plate mounted on the lower surface of a top nozzle disposed at the bottom of a metallurgical vessel and provided with a single opening communieating with the top nozzle, and a refractory sliding plate mounted in close contact with the stationary plate and provided with a plurality of openings, whereby the sliding plate is moved to provide or interrupt a communication between the top nozzle and the opening in the sliding plate.
  • a disadvantage of this type of known mechanism is that when the sliding plate is moved to open and close the nozzle or to throttle the flow of molten steel therethrough, the peripheral edge of the opening in the sliding plate is seriously lost by melting and the molten steel enters into and solidifies in the lost portion of the opening with the result that as the sliding motion of the sliding plate is continued, the sliding surfaces of the stationary plate and the sliding plate are seriously damaged by the solidified molten steel and this eventually results in the leakage of molten steel through the sliding surfaces.
  • the occurrence of this situation presents a very serious problem, since the leakage of the molten steel gives rise to a melting loss of the metal structure supporting the stationary plate and sliding plate assembly or endangers operating personnel.
  • the melting loss of the peripheral edge of the opening in the sliding plate naturally leads to a melting loss of the peripheral edge of the opening in the stationary plate.
  • the stationary plate is secured to the lower surface of the top nozzle at the bottom of the vessel, the sliding surface remote from the opening in the stationary plate is maintained in substantially undamaged condition despite the melting loss in the peripheral edge of the stationary plate opening. Therefore, when eventually the state is reached where the stationary plate and the sliding plate must be replaced, it is uneconomical to replace the stationary plate having the practically undamaged portrons.
  • a stationary plate in the conventional device is divided by holizontal plane into two parts upper one of which is an immovable upper retaining plate and the lower one of which is a movable lower retaining plate having a plurality of openings formed therein, whereby one of the openings in the lower retaining plate is initially employed and when the upper peripheral edge of this opening is rendered inoperative due to the melting loss or wear thereof.
  • the lower retaining plate is moved so that another opening communicates with the opening in the upper retaining plate located above, whereas when molten steel penetrates and leaks through for example the sliding surfaces of the lower retaining plate and a sliding plate corresponding to the sliding plate in the conventional devices during the pouring operation of the molten steel, the lower retaining plate is used to interrupt the communication between its opening and the opening in the upper retaining plate and thereby to ensure safety in the operation.
  • FIG. I is a longitudinal side sectional view of a sliding nozzle assembly according to an embodiment of the present invention.
  • FIG. 2 is a diagram useful for explaining the degree of frequency of use of the nozzle in a conventional stationary plate (2A) and sliding plate (28) assembly.
  • FIG. 3 is a diagram useful for explaining the wide open (3A) and fully closed (33) positions of the nozzle in the lower retaining plate used in the assembly of this invention.
  • FIG. 4 is a fractional sectional view showing a modification of the upper retaining plate used in the assembly of this invention.
  • numeral 1 designates the bottom plate of a metallurgical vessel and numeral 2 designates a top nozzle.
  • an upper retaining plate 3 made of refractory material and having a flat lower surface
  • a lower retaining plate 4 is mounted on the lower surface of the upper retaining plate 3.
  • the sliding plate 5 is provided with a plurality of openings 6, and 6 and it is housed in a pan-shaped rotor 8 which is provided with a gear 7 on the outer periphery thereof and which is rotatably carried on the metallurgical vessel bottom plate 1 by a spring supporting device that is not shown.
  • the lower retaining plate 4 placed in close contact with the sliding plate 5 is provided with a flat upper surface and a plurality of openings 9, and 9 with a gear 10 mounted on the outer periphery thereof.
  • the lower retaining plate 4 is fixedly fit in an annular member 12 formed with an engaging groove 11 in a portion of the upper surface thereof.
  • a transmission gear 14 for transmitting the rotation of a driving gear 13 to the gear 7 of the rotor 8 has a thickness so that it meshes either one of the rotor gear 7 and the annular member gear 10.
  • the upper end of a supporting shaft 15 for the gear 14 is bent and extends laterally and is provided at its forward end with a lock pin 16 which fits in the engaging groove 11 in the annular member 12.
  • a rack 17 is also formed in a portion of the upper end of the supporting shaft 15 so that the rack 17 engages with a pinion 19 mounted on the lower surface of the metallurgical vessel bottom plate 1 and provided with a handle 18.
  • numeral 20 designates collector nozzles held on the lower surface of the rotor 8
  • numeral 21 designates a steel plate placed on a portion of the upper surface of the lower retaining plate 4.
  • the operation of the sliding nozzle assembly is as follows.
  • one of the openings in the lower retaining plate 4, e.g., the opening 9 is communicated with an opening 3 of the upper retaining plate 3 and then one of the openings in the slide plate 5, e.g., the opening 6, is communicated with the lower retaining plate opening 9,.
  • the rotation of the driving gear 13 is transmitted to the rotor 8 through the transmission gear 14.
  • the pinion 19 is rotated by the handle 18 to lower the supporting shaft 15 of the transmission gear 14 so that the gear 14 engages with only the rotor gear 7 and it is out of engagement with the gear 10 of the annular member 12.
  • the lowering of the supporting shaft 15 simultaneously causes the lock pin 16 to be inserted in the groove 11 of the annular member 12 with the re sult that though the lower retaining plate 4 tends to rotate due to the sliding friction caused by the rotation of the rotor 8, it is prevented from rotating since the annular member 12 is held stationary by the lock pin 16 and thus the sliding plate alone is permitted to rotate.
  • the pinion 19 is rotated to raise the supporting shaft 15 so that the transmission gear 14 comes out of engagement with the gear 7 and engages with the gear 10 of the annular member 12.
  • the life of the stationary plate is one half or less as compared with that of the sliding plate. This is due to the fact that as will be seen from FIG. 2, the conventional stationary plate is provided with a single opening and thus this single opening is subjected to repeated use by the sliding movement of the sliding plate with resultant very high rate of melting loss of the opening peripheral edge.
  • the stationary plate of conventional device is divided into two parts the upper one of which an upper retaining plate and the lower one of which a lower retaining plate so that the lower half is used as an upper sliding plate having a plurality of openings therein and adapted to be slidable as the occasion demands, whereby when one of the openings in the lower retaining plate is damaged seriously, the other opening is used and in this way the openings may be used alternately to thereby increase the life expectancy of the retaining plates as compared with the conventional stationary plate.
  • the lower retaining plate is moved so that the opening 3 in the upper retaining plate 3 is closed with the relatively less damaged portion of the upper surface of the lower retaining plate to thereby positively prevent the occurrence of any trouble due to the penetration and leakage of molten steel.
  • the stationary plate of conventional device is divided into two parts and the lower one is rendered slidable, it is of course possible to apply the present invention to an assembly in which the reciprocating sliding motion is utilized.
  • the upper retaining plate 3 may be formed integral with the top nozzle 2 at the bottom plate of the metallurgical vessel as shown in FIG. 4.
  • a sliding nozzle assembly mounted at the bottom plate of a metallurgical vessel for pouring molten steel therethrough comprising a top nozzle, a lower retaining plate of refractory material mounted at the lower surface of said top nozzle and having a plurality of runner openings, a sliding plate of refractory material placed beneath said lower retaining plate and having a plurality of runner openings, and driving means provided on one side of said lower retaining and sliding plates to rotate said lower retaining and sliding plates independently of each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
US00441510A 1973-02-12 1974-02-11 Sliding nozzle assembly Expired - Lifetime US3850351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48016419A JPS5141974B2 (enrdf_load_html_response) 1973-02-12 1973-02-12

Publications (1)

Publication Number Publication Date
US3850351A true US3850351A (en) 1974-11-26

Family

ID=11915702

Family Applications (1)

Application Number Title Priority Date Filing Date
US00441510A Expired - Lifetime US3850351A (en) 1973-02-12 1974-02-11 Sliding nozzle assembly

Country Status (5)

Country Link
US (1) US3850351A (enrdf_load_html_response)
JP (1) JPS5141974B2 (enrdf_load_html_response)
DE (1) DE2404425B2 (enrdf_load_html_response)
FR (1) FR2217105B1 (enrdf_load_html_response)
GB (1) GB1459511A (enrdf_load_html_response)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076153A (en) * 1974-10-24 1978-02-28 Metacon Ag Plate structure for a liquid metal container closure
US4284214A (en) * 1977-07-13 1981-08-18 Nippon Kokan Kabushiki Kaisha Method of continuous casting
US4498611A (en) * 1982-03-05 1985-02-12 Nippon Kokan Kabushiki Kaisha Dual door type rotary nozzle
US4556157A (en) * 1982-05-24 1985-12-03 Flo-Con Systems, Inc. Pressure fluid teeming valve and method
US4577785A (en) * 1979-04-13 1986-03-25 Nippon Kokan Kabushiki Kaisha Hinged rotary nozzle
US4591080A (en) * 1982-12-14 1986-05-27 Nippon Kokan Kabushiki Kaisha Rotary nozzle system for metallurgical vessels
US4747580A (en) * 1984-06-22 1988-05-31 Metacon Ag Pair of refractory plates for swivelling or rotary sliding closure unit and method of operation thereof
DE3726312A1 (de) * 1987-08-07 1989-02-16 Didier Werke Ag Verschlusskoerper fuer einen schiebeverschluss an einem metallschmelze enthaltenden gefaess sowie schiebeverschluss mit einem derartigen verschlusskoerper
US20070199599A1 (en) * 2003-10-10 2007-08-30 Amerikam, Inc. Diverter valve
US20080157020A1 (en) * 2005-03-10 2008-07-03 Techgate S.A. Linear Sliding Gate Valve for a Metallurgical Vessel
US20090242053A1 (en) * 2003-10-10 2009-10-01 Amerikam, Inc. Diverter valve
CN105215344A (zh) * 2015-11-16 2016-01-06 张钧峰 一种耐材消耗低的滑动水口装置
US11135646B2 (en) * 2016-10-20 2021-10-05 Krosakiharima Corporation Plate, and holding apparatus and holding method for the plate

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH572176A5 (enrdf_load_html_response) * 1974-10-24 1976-01-30 Metacon Ag
JPS5157636A (ja) * 1974-11-16 1976-05-20 Nippon Steel Corp Renzokuchuzosochi
DE2836409C2 (de) * 1978-08-19 1982-07-22 Stopinc AG, Zug Vorrichtung zum Einführen von Behandlungsstoffen in die in einem metallurgischen Gefäß enthaltene Schmelze
DE2840171C3 (de) * 1978-09-15 1981-06-04 Stahlwerke Röchling-Burbach GmbH, 6620 Völklingen Verschlußvorrichtung für den Bodenausguß von Gießpfannen
JPS5747575A (en) * 1980-09-08 1982-03-18 Nippon Kokan Kk <Nkk> Double door type rotary nozzle
US4561573A (en) * 1982-08-20 1985-12-31 Flo-Con Systems, Inc. Valve and replaceable collector nozzle
DE3347901C2 (de) * 1982-12-14 1987-02-05 Kokan Kikai Kogyo K. K., Kawasaki, Kanagawa Drehduesenanordnung fuer metallurgische behaelter
DE3347903C2 (de) * 1982-12-14 1987-01-22 Kokan Kikai Kogyo K. K., Kawasaki, Kanagawa Drehduesenanordnung fuer metallurgische behaelter
IT1179011B (it) * 1983-09-28 1987-09-16 Tarroga S A Chiusura per canali di colata di liquidi a temperatura elevata
DE3403522A1 (de) * 1984-02-02 1985-08-14 Metacon AG, Zürich Feuerfeste verschleissteile fuer schieberverschluesse
DE3423156C1 (de) * 1984-06-22 1985-10-10 Metacon AG, Zürich Schwenkschieber fuer den Ausguss metallurgischer Gefaesse
GB2296210A (en) * 1994-12-23 1996-06-26 Flogates Ltd Sliding gate valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1072951A (en) * 1911-10-14 1913-09-09 David S Johnston Fire-hose nozzle.
US3035777A (en) * 1959-11-10 1962-05-22 Robert L Bodell Distribution system for agricultural liquids
US3516611A (en) * 1968-06-04 1970-06-23 Spraying Systems Co Indexable sprayer with plural nozzle orifices
US3764047A (en) * 1971-11-12 1973-10-09 Nippon Kokan Kk Rotary nozzle for ladle
US3814326A (en) * 1971-04-13 1974-06-04 L Bartlett Spray nozzle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU37533A1 (enrdf_load_html_response) * 1959-06-15

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1072951A (en) * 1911-10-14 1913-09-09 David S Johnston Fire-hose nozzle.
US3035777A (en) * 1959-11-10 1962-05-22 Robert L Bodell Distribution system for agricultural liquids
US3516611A (en) * 1968-06-04 1970-06-23 Spraying Systems Co Indexable sprayer with plural nozzle orifices
US3814326A (en) * 1971-04-13 1974-06-04 L Bartlett Spray nozzle
US3764047A (en) * 1971-11-12 1973-10-09 Nippon Kokan Kk Rotary nozzle for ladle

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076153A (en) * 1974-10-24 1978-02-28 Metacon Ag Plate structure for a liquid metal container closure
US4284214A (en) * 1977-07-13 1981-08-18 Nippon Kokan Kabushiki Kaisha Method of continuous casting
US4577785A (en) * 1979-04-13 1986-03-25 Nippon Kokan Kabushiki Kaisha Hinged rotary nozzle
US4498611A (en) * 1982-03-05 1985-02-12 Nippon Kokan Kabushiki Kaisha Dual door type rotary nozzle
US4556157A (en) * 1982-05-24 1985-12-03 Flo-Con Systems, Inc. Pressure fluid teeming valve and method
US4591080A (en) * 1982-12-14 1986-05-27 Nippon Kokan Kabushiki Kaisha Rotary nozzle system for metallurgical vessels
US4747580A (en) * 1984-06-22 1988-05-31 Metacon Ag Pair of refractory plates for swivelling or rotary sliding closure unit and method of operation thereof
DE3726312A1 (de) * 1987-08-07 1989-02-16 Didier Werke Ag Verschlusskoerper fuer einen schiebeverschluss an einem metallschmelze enthaltenden gefaess sowie schiebeverschluss mit einem derartigen verschlusskoerper
US20070199599A1 (en) * 2003-10-10 2007-08-30 Amerikam, Inc. Diverter valve
US20090242053A1 (en) * 2003-10-10 2009-10-01 Amerikam, Inc. Diverter valve
US7717131B2 (en) * 2003-10-10 2010-05-18 Amerikam, Inc. Diverter valve
US20080157020A1 (en) * 2005-03-10 2008-07-03 Techgate S.A. Linear Sliding Gate Valve for a Metallurgical Vessel
US7648053B2 (en) * 2005-03-10 2010-01-19 Tech-Gate S.A. Linear sliding gate valve for a metallurgical vessel
CN105215344A (zh) * 2015-11-16 2016-01-06 张钧峰 一种耐材消耗低的滑动水口装置
US11135646B2 (en) * 2016-10-20 2021-10-05 Krosakiharima Corporation Plate, and holding apparatus and holding method for the plate

Also Published As

Publication number Publication date
DE2404425A1 (de) 1974-08-29
JPS5141974B2 (enrdf_load_html_response) 1976-11-12
FR2217105A1 (enrdf_load_html_response) 1974-09-06
GB1459511A (en) 1976-12-22
FR2217105B1 (enrdf_load_html_response) 1978-02-10
DE2404425B2 (de) 1975-09-04
JPS49104838A (enrdf_load_html_response) 1974-10-03

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