US3765579A - Linearly movable gate mechanism - Google Patents

Linearly movable gate mechanism Download PDF

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Publication number
US3765579A
US3765579A US3765579DA US3765579A US 3765579 A US3765579 A US 3765579A US 3765579D A US3765579D A US 3765579DA US 3765579 A US3765579 A US 3765579A
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United States
Prior art keywords
carrier
gate
housings
frame
bores
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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
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F Cramer
C Kelly
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United States Steel Corp
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United States Steel Corp
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Priority to US25199072A priority Critical
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Publication of US3765579A publication Critical patent/US3765579A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14Closures
    • B22D41/22Closures 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
    • B22D41/40Means for pressing the plates together

Abstract

A gate mechanism for controlling flow of material from the outlet of a bottom pour vessel. The gate is supported on springpressed antifriction rollers, and moves linearly between pouring, throttling and closed positions.

Description

[ Oct. 16, 1973 United States Patent 1191 Cramer et al.

222/DIG. 7

222/DIG. 7

77 on DD Mfl 22 22 [5 LINEARLY MOVABLE GATE MECHANISM 3,618,834 11/1971 Shapland [75] Inventors: Fred C. Cramer, Scott Twp., 23:82 Allegheny County; Calvin Kelly, 3,511,471 5/1970 Franklin Twp., Westmoreland County, both of Pa.

[73] Assignee: United States Steel Corporation,

Primary ExaminerRobert B. Reeves Assistant Examiner-David A. Scherbel P tt b P l s urgh a Attorney-Wa1ter P. Wood [22] Filed: May 10, 1972 [21] Appl. No.: 251,990

ABSTRACT moves linearly between pouring, throttling and closed positions.

.. 222/D1G. 7 2 Claims, 3 Drawing Figures PAIENIEDum 15 ms 3.765.579

SHEET 1 0F 3 PATENTED Hill 16 I975 SHEET 30F 3 m mam LINEARLY MOVABLE GATE MECHANISM This invention relates to an improved linearly movable gate mechanism for controlling flow of material from a bottompour vessel.

Although our invention is not thus limited, our gate mechanism is particularly useful as applied to vessels for pouring liquid metal, for example a ladle or a tundish. Such vessels have an outlet in the bottom wall through which liquid metal is poured into a receiving vessel. It is known to equip this type of pouring vessel with a linearly movable gate mounted on the underside of the bottom wall for controlling flow of metal through the outlet. The usual practice has been to press the gate firmly against the vessel bottom with springs to prevent metal from leaking into the crevice therebetween, where it would otherwise solidify as a tin. In previous constructions a variety of means have been used for supporting such gates, for example, spring-pressed levers as shown in Shapland U.S. Pat. No. 3,352,465, a fixed but removable cover as shown in Fichera US. Pat. No. 3,454,201, or graphite blocks as shown in Grosko US. Pat. No. 3,480,186. Rotatable gates also are known, and have been supported in a variety of ways, at least one of which includes ball bearings as shown in Rossi US. Pat. No. 3,511,471.

An object of our invention is to provide an improved gate mechanism in which a linearly movable gate is supported on spring-pressed antifriction rollers.

A further object is to provide improved antifriction roller support for a linearly movable gate in which the rollers are spring-pressed and constructed to withstand the severe operating conditions necessarily encountered in pouring liquid metal.

In the drawings:

FIG. 1 is a top plan view, partly in section, of our improved gate mechanism;

FIG. 2 is a longitudinal section on line lI-Il of FIG. 1; and

FIG. 3 is a cross section' on line Ill-III of FIG. 1.

FIGS. 2 and 3 show the lower portion of a conventional bottom-pour vessel which has a nozzle 12 in its bottom wall. A mounting plate 13 is attached to the bottom wall with bolts 14. The mounting plate has an opening 15 through which the lower end of nozzle 12 projects in the usual fashion. The mounting plate and parts carried thereby form an assembly which can be installed on the vessel or removed as a unit.

The gate mechanism illustrated includes a rectangular supporting frame 16 which depends from the mounting plate 13 and is hinged thereto to facilitate replacement of parts. Frame 16 includes rigidly connected side members 17 and 17a and transverse members 18, 18a and 18b. The right edge (FIG. 3) of the mounting plate 13 carries a plurality of spaced-apart pairs of hinge elements 19, and both edges carry a plurality of pivot blocks 20. The outer face of the side member 17 at the right of frame 16 carries hinge blocks 21, each of which is received between a different pair of hinge elements 19 and hinged thereto on pins 22. Respective eyebolts 23 are pivoted to blocks and received in bifurcated lugs 24 carried by the outer faces of both side members 17 and 17a. Nuts 25 are threadedly engaged with the lower ends of the eyebolts to hold the frame in its operative position. When the eyebolts are released from the lugs, the frame opens downwardly about its hinged connection to the mounting plate.

In accordance with our invention, respective elongated spring housings 30 are bolted to the inner faces of both side members 17 and 17a. Each housing 30 has a plurality of vertical bores 31 and tapped counterbores 32 at the lower ends of the bores. Respective retainer caps 33 are threadedly engaged with the counterbores and carry integral wrench heads 34 at their lower faces. Respective plugs 35 and compression springs 36 are housed within the bores and counterbores. The springs bear against the retainer caps 33 and plugs 35 and thus urge the plugs upwardly. The plugs have external shoulders 37 which can abut corresponding internal shoulders at the tops of the counterbores to limit upward movement of the plugs. Each plug carries a respective opposed pair of high-temperature spherical roller bearings 38 in which a hardened steel roller 39 is journaled on a hardened steel shaft 40. The upper portions of the plugs 35 and rollers 39 protrude above the upper faces of the spring housings 30.

A rectangular metal gate carrier 43 is supported on rollers 39 for linear movement. A pusher bar 44 is attached to the right end of the carrier 43 (FIGS. 1 and 2). The transverse member 18 at the right of frame 16 carries a double-acting fluid-pressure cylinder 45 which contains a reciprocable piston and piston rod 46. The end of the piston rod is attached to the pusher bar 44 through a pin 47. The transverse members 18a and 18b of the frame 16 have openings 48 to accommodate the carrier 43.

The upper face of the carrier 43 has a flange 49 which removably receives a gate 50 formed of a metal tray and a refractory body. The gate illustrated includes a pouring tube 51 which depends through an opening 52 in the carrier 43. The upper face of gate 50 bears against a refractory top plate 53 which is fixed within frame 16 beneath the mounting plate 13. The top plate is held in place by set screws 54 threadedly engaged with the transverse members 18a and 18b. The top plate has an orifice 55 aligned with the opening in nozzle l2. Suitable high-temperature gaskets 56 and 57 are interposed between the gate and carrier 43 and between the top plate 53 and mounting plate 13. The gate 50 and its pouring tube 51 have a continuous opening 58 which can be aligned with orifice to permit pouring, partially aligned to throttle the pouring stream, or moved out of alignment to close off pouring. The gate 50 illustrated has a convex upper surface, and the top plate 53 a mating concave lower surface as described and claimed in application Ser. No. 244,518 filed Apr. 17, 1972 by the present co-inventor Kelly. This feature is desirable in preventing warping of the gate, but is optional for the present invention.

A heat shield 60 is bolted to the underside of frame 16 and has an elongated slot 61 which accommodates the pouring tube 51. A splash shield 62 is slidably supported on the upper face of the heat shield 60 to cover the slot 61. The splash shield has an opening 63 which receives the pouring tube. The parts within the spring housing 30 are further protected from excessive heat by an air-cooling system. The side frame members 17 and 17a have air ducts 64 to which air lines 65 are connected through suitable fittings 66. Passages 67 afford communication between the ducts 64 and the counterbores 32 in the spring housings.

In operation, the cylinder 45 can be actuated to move gate 50 linearly to open, closed, or throttling positions, as already explained. Both edges of the gate carrier 43 ride on antifriction rollers 39 which enable the carrier to move easily between the different gate positions. The springs 36 urge the rollers into contact with the bottom of the carrier and in turn urge the upper face of the gate into close-fitting contact with the top plate 53. The parts are protected from excessive heat by the shielding and air cooling systems.

From the foregoing description, it is seen that our invention affords a simple practical mechanism for supporting and moving a gate. The use of rollers on which the gate carrier rides assures that the gate always moves easily without binding.

We claim:

1. In a gate mechanism for use on a bottom-pour vessel to control flow of material through an outlet in the vessel bottom, said mechanism comprising:

a mounting plate adapted to be fixed to the vessel bottom and having an orifice to be aligned with the vessel outlet;

a frame hinged to said mounting plate and depending therefrom;

means for releasably holding said frame in a fixed position beneath said mounting plate;

a pair of spaced-apart elongated spring housings carried by the inside of said frame at opposite sides of said orifice, each of which housings has a plurality of bores; respective springs housed within said bores;

said frame having passages for introducing cooling air to said bores;

a carrier supported above said housings;

a gate mounted within said carrier;

a top plate fixed within said frame beneath said mounting plate and against which said gate bears; and

motive means connected with said carrier for linearly moving said carrier and said gate with respect to said housings and said top plate;

the combination therewith of improved means supporting said carrier on said housings, said supporting means comprising:

respective vertically movable plugs housed within said bores and urged upwardly by said springs;

respective opposed pairs of high-temperature spherical roller bearings carried by each of said plugs; and

respective hardened steel rollers journaled in each pair of said bearings, said rollers protruding above said housings, said carrier riding on said rollers.

2. A combination as defined in claim 1 in which the lower ends of said bores have counterbores with a downwardly facing shoulder at the end of the counterbore, and said plugs have upwardly facing shoulders cooperable with said downwardly facing shoulders to limit upward movement of said plugs and rollers.

Claims (2)

1. In a gate mechanism for use on a bottom-pour vessel to control flow of material through an outlet in the vessel bottom, said mechanism comprising: a mounting plate adapted to be fixed to the vessel bottom and having an orifice to be aligned with the vessel outlet; a frame hinged to said mounting plate and depending therefrom; means for releasably holding said frame in a fixed position beneath said mounting plate; a pair of spaced-apart elongated spring housings carried by the inside of said frame at opposite sides of said orifice, each of which housings has a plurality of bores; respective springs housed within said bores; said frame having passages for introducing cooling air to said bores; a carrier supported above said housings; a gate mounted within said carrier; a top plate fixed within said frame beneath said mounting plate and against which said gate bears; and motive means connected with said carrier for linearly moving said carrier and said gate with respect to said housings and said top plate; the combination therewith of improved means supporting said carrier on said housings, said supporting means comprising: respective vertically movable plugs housed within said bores and urged upwardly by said springs; respective opposed pairs of high-temperature spherical roller bearings carried by each of said plugs; and respective hardened steel rollers journaled in each pair of said bearings, said rollers protruding above said housings, said carrier riding on said rollers.
2. A combination as defined in claim 1 in which the lower ends of said bores have counterbores with a downwardly facing shoulder at the end of the counterbore, and said plugs have upwardly facing shoulders cooperable with said downwardly facing shoulders to limit upward movement of said plugs and rollers.
US3765579D 1972-05-10 1972-05-10 Linearly movable gate mechanism Expired - Lifetime US3765579A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917130A (en) * 1973-02-12 1975-11-04 Nippon Kokan Kk Mounting structure for sliding nozzle unit
US4017010A (en) * 1974-07-17 1977-04-12 Stopinc Aktiengesellschaft Closure element for a slide closure and process for the manufacture thereof
US4056217A (en) * 1975-04-24 1977-11-01 Snac S.P.A. Refrattari Argille E Caolini Sliding gate valve for molten metal with adjustable plates
FR2400402A1 (en) * 1977-08-16 1979-03-16 Thyssen Huette Ag Sliding closure for casting container of
DE2821839A1 (en) * 1978-05-19 1979-11-22 Stopinc Ag Sliding closure for the spout to melt metal containers containing
US4182466A (en) * 1976-06-25 1980-01-08 Didier-Werke Ag Wear part for sliding gates and process for the production of such wear parts and sliding gate with such wear parts
US4344550A (en) * 1979-07-17 1982-08-17 Vesuvius International Corporation Self-adjusting arrangement for refractory plates of slide gate mechanism
FR2506192A1 (en) * 1981-05-19 1982-11-26 Stopinc Ag Shut-off device has a slide or drawer
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
US4421256A (en) * 1981-10-02 1983-12-20 United States Steel Corporation Sliding gate valve having adjustable seal pressure
WO1987000780A1 (en) * 1985-08-08 1987-02-12 Stopinc Aktiengesellschaft Tensioning system for sliding closures
US4667937A (en) * 1983-03-24 1987-05-26 Flo-Con Systems, Inc. Heat shield for sliding gate valve
US4697723A (en) * 1985-04-10 1987-10-06 Stopinc Aktiengesellschaft Tensioning structure for a sliding closure unit
EP0382878A1 (en) * 1989-02-15 1990-08-22 NUOVA SIRMA S.p.A. Slide gate nozzle
US4953760A (en) * 1989-06-02 1990-09-04 Nuova Sanac S.P.A. Slide-gate pouring appliance for ladles and similar devices
US4960358A (en) * 1988-01-26 1990-10-02 Foster Wheeler U.S.A. Bottom-unheading device and method for vertical vessels
US5141139A (en) * 1990-03-05 1992-08-25 Cerafer S.A.R.L. Slide gate nozzle for metallurgical vessels
US5174908A (en) * 1989-03-03 1992-12-29 Flo-Con Systems, Inc. Non-reversible sliding gate, valve and method
ES2143340A1 (en) * 1995-10-31 2000-05-01 Krosaki Corp Sliding nozzle device and method for charging and releasing surface pressure by using it
EP1029618A1 (en) * 1997-10-31 2000-08-23 Kokan Kikai Kogyo Kabushiki Kaisha Apparatus for controlling amount of teeming molten metal and slide plate used for the same
US6276573B1 (en) * 1999-02-25 2001-08-21 Sumitomo Heavy Industries Himatex Co. Slide gate
US6505760B1 (en) * 2001-08-28 2003-01-14 Crustbuster/Speed King Seed box tote
DE10324801A1 (en) * 2003-06-02 2005-01-05 Knöllinger FLO-TEC GmbH Gießpfannenschieber
US20080053353A1 (en) * 2006-09-01 2008-03-06 Norbert Werner Four box seed box mount with rotary platform and unloading conveyor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US43071A (en) * 1864-06-07 Improved apparatus for melting metals for casting stereotype-plates
US3480186A (en) * 1967-12-22 1969-11-25 United States Steel Corp Sliding gate for metal-holding vessel
US3501068A (en) * 1968-05-21 1970-03-17 United States Steel Corp Bottom-pour teeming vessel with sliding gate and pouring tube
US3511471A (en) * 1968-01-19 1970-05-12 Concast Inc Ladle stopper
US3618834A (en) * 1969-05-26 1971-11-09 United States Steel Corp Sliding gate closure for bottom-pour vessel removable as a unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US43071A (en) * 1864-06-07 Improved apparatus for melting metals for casting stereotype-plates
US3480186A (en) * 1967-12-22 1969-11-25 United States Steel Corp Sliding gate for metal-holding vessel
US3511471A (en) * 1968-01-19 1970-05-12 Concast Inc Ladle stopper
US3501068A (en) * 1968-05-21 1970-03-17 United States Steel Corp Bottom-pour teeming vessel with sliding gate and pouring tube
US3618834A (en) * 1969-05-26 1971-11-09 United States Steel Corp Sliding gate closure for bottom-pour vessel removable as a unit

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917130A (en) * 1973-02-12 1975-11-04 Nippon Kokan Kk Mounting structure for sliding nozzle unit
US4017010A (en) * 1974-07-17 1977-04-12 Stopinc Aktiengesellschaft Closure element for a slide closure and process for the manufacture thereof
US4056217A (en) * 1975-04-24 1977-11-01 Snac S.P.A. Refrattari Argille E Caolini Sliding gate valve for molten metal with adjustable plates
US4182466A (en) * 1976-06-25 1980-01-08 Didier-Werke Ag Wear part for sliding gates and process for the production of such wear parts and sliding gate with such wear parts
JPS5456031A (en) * 1977-08-16 1979-05-04 Thyssen Ag Sliding type pouring nozzle for casting vessel
JPS6045028B2 (en) * 1977-08-16 1985-10-07 Teitsusen Ag
FR2400402A1 (en) * 1977-08-16 1979-03-16 Thyssen Huette Ag Sliding closure for casting container of
DE2821839A1 (en) * 1978-05-19 1979-11-22 Stopinc Ag Sliding closure for the spout to melt metal containers containing
US4344550A (en) * 1979-07-17 1982-08-17 Vesuvius International Corporation Self-adjusting arrangement for refractory plates of slide gate mechanism
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
FR2506192A1 (en) * 1981-05-19 1982-11-26 Stopinc Ag Shut-off device has a slide or drawer
US4421256A (en) * 1981-10-02 1983-12-20 United States Steel Corporation Sliding gate valve having adjustable seal pressure
US4667937A (en) * 1983-03-24 1987-05-26 Flo-Con Systems, Inc. Heat shield for sliding gate valve
US4697723A (en) * 1985-04-10 1987-10-06 Stopinc Aktiengesellschaft Tensioning structure for a sliding closure unit
WO1987000780A1 (en) * 1985-08-08 1987-02-12 Stopinc Aktiengesellschaft Tensioning system for sliding closures
US4752017A (en) * 1985-08-08 1988-06-21 Stopinc Aktiengesellschaft Tensioning device for sliding gates
US4960358A (en) * 1988-01-26 1990-10-02 Foster Wheeler U.S.A. Bottom-unheading device and method for vertical vessels
EP0382878A1 (en) * 1989-02-15 1990-08-22 NUOVA SIRMA S.p.A. Slide gate nozzle
US5174908A (en) * 1989-03-03 1992-12-29 Flo-Con Systems, Inc. Non-reversible sliding gate, valve and method
US4953760A (en) * 1989-06-02 1990-09-04 Nuova Sanac S.P.A. Slide-gate pouring appliance for ladles and similar devices
US5141139A (en) * 1990-03-05 1992-08-25 Cerafer S.A.R.L. Slide gate nozzle for metallurgical vessels
ES2143340A1 (en) * 1995-10-31 2000-05-01 Krosaki Corp Sliding nozzle device and method for charging and releasing surface pressure by using it
EP1029618A1 (en) * 1997-10-31 2000-08-23 Kokan Kikai Kogyo Kabushiki Kaisha Apparatus for controlling amount of teeming molten metal and slide plate used for the same
EP1029618A4 (en) * 1997-10-31 2004-03-31 Nippon Kokan Kk Apparatus for controlling amount of teeming molten metal and slide plate used for the same
US6276573B1 (en) * 1999-02-25 2001-08-21 Sumitomo Heavy Industries Himatex Co. Slide gate
US6505760B1 (en) * 2001-08-28 2003-01-14 Crustbuster/Speed King Seed box tote
DE10324801A1 (en) * 2003-06-02 2005-01-05 Knöllinger FLO-TEC GmbH Gießpfannenschieber
US20080053353A1 (en) * 2006-09-01 2008-03-06 Norbert Werner Four box seed box mount with rotary platform and unloading conveyor

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ZA7300683B (en) 1973-10-31

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