US3866806A - Operating mechanism for slidable gates and method of operating slide gate - Google Patents

Operating mechanism for slidable gates and method of operating slide gate Download PDF

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Publication number
US3866806A
US3866806A US337252A US33725273A US3866806A US 3866806 A US3866806 A US 3866806A US 337252 A US337252 A US 337252A US 33725273 A US33725273 A US 33725273A US 3866806 A US3866806 A US 3866806A
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US
United States
Prior art keywords
gate
slow
vessel
motion region
gates
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
US337252A
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English (en)
Inventor
Jr Earl P Shapland
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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Filing date
Publication date
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US337252A priority Critical patent/US3866806A/en
Priority to AR252572A priority patent/AR207440A1/es
Priority to US432370A priority patent/US3918613A/en
Priority to ZA00741121A priority patent/ZA741121B/xx
Priority to BE141471A priority patent/BE811663A/xx
Priority to ES423714A priority patent/ES423714A1/es
Priority to JP49023690A priority patent/JPS5226743B2/ja
Priority to NO740690A priority patent/NO140044C/no
Priority to DE2409670A priority patent/DE2409670C3/de
Priority to NLAANVRAGE7402759,A priority patent/NL174434C/xx
Priority to CA193,750A priority patent/CA992505A/en
Priority to HUUE45A priority patent/HU168703B/hu
Priority to FI605/74A priority patent/FI57887C/fi
Priority to AT166174A priority patent/AT340616B/de
Priority to DE19742462292 priority patent/DE2462292C3/de
Priority to BR741424A priority patent/BR7401424D0/pt
Priority to BR1422/74A priority patent/BR7401422D0/pt
Priority to IE434/74A priority patent/IE39420B1/xx
Priority to TR18250A priority patent/TR18250A/tr
Priority to YU530/74A priority patent/YU39916B/xx
Priority to AR252573A priority patent/AR211762A1/es
Priority to GB4682476A priority patent/GB1469413A/en
Priority to GB4682376A priority patent/GB1469412A/en
Priority to GB944674A priority patent/GB1469411A/en
Priority to FR7407152A priority patent/FR2219815B1/fr
Priority to IT67557/74A priority patent/IT1009191B/it
Priority to JP50008610A priority patent/JPS50120431A/ja
Publication of US3866806A publication Critical patent/US3866806A/en
Application granted granted Critical
Priority to DK520375A priority patent/DK144144C/da
Priority to SU752195603A priority patent/SU969145A3/ru
Priority to AT239676A priority patent/AT340077B/de
Priority to IN973/CAL/76A priority patent/IN143588B/en
Priority to AU65903/74A priority patent/AU485647B2/en
Priority to NO772924A priority patent/NO139513C/no
Priority to FI773690A priority patent/FI56323C/fi
Priority to YU02574/80A priority patent/YU257480A/xx
Priority to NLAANVRAGE8102914,A priority patent/NL176759C/xx
Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • 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
    • B22D41/24—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 rectilinearly movable plate
    • 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
    • B22D41/42—Features relating to gas injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics

Definitions

  • the present invention enables the outlet to be partially open, whereby the stream discharging therefrom can be throttled.
  • the mechanism includes a main drive means for pushing gates from a ready position to a slow-motion region under the vessel outlet.
  • the slow-motion region of an orifice gate extends at least from a position in which the vessel outlet is partially open to a position in which it is fully open.
  • An opposed auxiliary drive serves to retard movement of a gate as soon as it reaches the slowmotion region. Thereafter, the main drive pushes an orifice gate slowly and under close control to any desired teeming position within the slow-motion region.
  • the mechanism also includes an improved arrangement for conducting gases to the nozzle at the vessel outlet to prevent skulls from forming, and an improved means for attaching a pouring tube to its holder.
  • This invention relates to an improved operating mechanism for slidable gates which are used to control flow of liquid from a bottom pour vessel, and to an improved flow-controlling method.
  • my operating mechanism is particularly useful when applied to a vessel from which liquid metal is teemed into a receiver therebelow, for example, a tundish from which liquid steel is teemed into a continuous-casting mold.
  • My control method is particularly useful when applied in the corresponding operation.
  • FIGS. l-3 of the Shapland patent show a reciprocating gate, different portions of which form a closed area and an orifice.
  • the closed area is positioned under the vessel outlet to prevent flow of liquid from the vessel, and the orifice is positioned thereunder to permit flow.
  • FIGS. 4-6 of the patent show slide-through gates, wherein each gate is either a blank or an orifice gate.
  • a blank gate is positioned under the vessel outlet to prevent flow, and displaced with an orifice gate to permit flow.
  • the vessel outlet is either fully open or fully closed. There is no provision for teeming through a partially open outlet, that is, using the gate to throttle the pouring stream.
  • Most other gate-operating mechanisms with which I am familiar have a similar lack of flexibility.
  • An object of my invention is to provide an improved gate-operating mechanism and an improved flowcontrolling method which enable me to throttle a stream of liquid as it discharges through the outlet of a bottom-pour vessel.
  • a further object is to provide an improved gateopening mechanism and an improved flow-controlling method which enable me to move an orifice gate quickly from a ready position into a slow-motion region under a vessel outlet, and thereafter slowly and under close control in either direction to any desired teeming position within the slow-motion region.
  • a further object is to provide an improved gateoperating mechanism which enables me to change readily either the blank gate or the orifice gate during the course of a teeming operation.
  • a further object is to provide a gate-operating mechanism which affords the foregoing advantages and at the same time can be used for positioning a separate pouring tube beneath the gate.
  • a further object is to provide an improved means for introducing gas to a permeable plug in a blank gate and avoiding any need for connecting pipes or tubes to movable parts, and also affording automatic gas shut off when the vessel outlet is opened to begin teeming.
  • a further object is to provide an improved means for attaching a pouring tube to a holder which can be used in conjunction with a slidable gate.
  • FIG. I is a top plan view of my gate-operating mechanism and the mounting plate for attaching the mechanism to a bottom-pour vessel;
  • FIG. 2 is a side elevational view of a portion of a bottom-pour vessel with my gate-operating mechanism attached;
  • FIG. 3 is a longitudinal section on line IIIIII of FIG.
  • FIG. 4 is a cross section on line lV-IV of FIG. 2, but showing a blank gate positioned under the vessel outlet;
  • FIG. 5 is a cross section on line VV of FIG. 2, but showing a blank gate positioned under the vessel outlet;
  • FIG. 6 is a bottom plan view of the mounting plate
  • FIG. 7 is an exploded perspective view of the pouring tube and its holder illustrating my preferred attaching means
  • FIG. 8 is a graph comparing the relation between the flow of metal from a tundish and the head of metal therein with the outlet partially open, and the outlet fully open;
  • FIG. 9 is a schematic diagram of the hydraulic and pneumatic circuits embodied in the mechanism.
  • FIGS. 2, 3, 4, and 5 show a portion of a conventional bottom-pour vessel for handling liquid metals, for example, a tundish used to teem metal into a continuouscasting mold.
  • the vessel includes a metal shell 10, a refractory lining l2, and a refractory pouring nozzle 13 extending through the lining and shell and defining the outlet.
  • a mounting plate 14 is fixed to the bottom wall of the vessel surrounding the lower portion of the nozzle.
  • the mounting plate has horizontal passages 16 and 17.
  • the passages 16 communicate with series of nozzles 18 fixed to the underside of the mounting plate for supplying cooling air to the springs embodied in my operating mechanism, hereinafter described.
  • the passage 17 has an outlet port 17a for supplying gas (inert and- /or oxygen) to the vessel nozzle 13 as also hereinafter described.
  • the mounting plate has a plurality of depending lugs 19 for attaching my operating mechanism to the vessel. The lugs have transverse holes 20.
  • the mechanism has a fabricated frame 21 on which I mount the other parts.
  • this frame includes a horizontal plate 22, a continuous flange 23 depending from one side edge of the plate, and vertically spaced upper and lower rails 24 and 25 projecting inwardly from the flange.
  • the plate At its opposite side edge, the plate carries depending flange segments 26, 27, and 28 from which horizontally spaced upper rail segments 29, 30 and 31 respectively project inwardly.
  • Horizontally spaced lower rail segments 32 and 33 project inwardly from the flange segments 26 and 28 respectively.
  • the foregoing parts of the frame are rigidly connected to one another, but preferably the lower rail 25 and rail segments 32 and 33 and the lower portions of the flange 23 and flange segments 26 and 28 can be removed.
  • the purpose of the lower rail and rail segments is to support a pouring-tube holder 34, hereinafter described. When no pouring tube is used, the parts on which it would have been supported are not needed.
  • Plate 22 has vertical holes 35 and horizontal holes 36 communicating with the respective vertical holes.
  • the lugs 19 on the mounting plate 14 match the vertical holes and are received therein. I insert pins 37 through the aligned horizontal holes 20 and 36 in the lugs 19 and plate 22 respectively to hold the operating mechanism on the vessel.
  • the upper rail 24 and rail segments 29, 30 and 31 are adapted to support refractory blank gates 38 and orifice gates 39 for movement along a linear path between a ready position, a slowmotion region under the nozzle 13, and a removal position beyond the nozzle.
  • Plate 22 has-a central opening 41 which receives a stationary refractory top plate 42 (FIGS. 3, 4 and 5).
  • the latter has the usual orifice 43, which is aligned with the base of the nozzle 13. Since the refractory plate is exposed directly to liquid metal, it must be replaced frequently. Replacement is simple, since the top plate is accessible when the frame 21 is removed from the mounting plate 14.
  • I mount a main fluid-pressure cylinder 46 on frame 21 at one end of the path of gate movement, and an auxiliary fluid-pressure cylinder 47 at the other end thereof (FIGS. 1,2 and 3).
  • the main cylinder 46 contains a reciprocable piston 48 and a piston rod 49, whichcarries a ram 50 at its free end.
  • the auxiliary cylinder 47 contains a reciprocable piston 51 and a piston rod 52, which carries an opposed second ram 53 at its free end.
  • a hydraulic fluid line 54 and a compressed air line 55 are connected to the back and front ends of the main cylinder 46 respectively.
  • a hydraulic fluid line 56 and a compressed air line 57 are connected to back and front ends of the auxiliary cylinder 47.
  • the frame 21 carries opposed gate-supporting levers 60 and opposed tube-holder-supporting levers 61 which are best shown in FIGS. 4 and 5 respectively.
  • the rails 24 and 25 and rail segments 30 are interrupted to accommodate the levers 60 and 61, while the levers 61 are slotted to accommodate the levers 60 (FIG. 4).
  • the gatesupporting levers 60 are pivotally mounted on crowned washers 62 carried by bolts 63 which depend from flange 23 and flange segment 27 at opposite sides of the gate 38 or 39.
  • the flange 23 and flange segment 27 have vertical bores 64 within which I mount compression springs 65 and plungers 66.
  • the springs act downwardly through the plungers against the outboard ends of levers 60, whereby the inboard ends act upwardly against the gate and thus press the gate firmly against the top plate 42 thereabove.
  • the tube-holder supporting levers 61 are pivotally mounted on crowned washers 67 carried by bolts 68 which depend from flange 23 and flange segment 27 at opposite sides of the tube holder 34.
  • Springs 69 which are similar to springs 65, act downwardly through plungers 70 against the outboard ends of levers 61, whereby the inboard ends act upwardly against the tube holder and then press the tube holder firmly against the gate 38 or 39 thereabove.
  • the bores which receive the springs lie directly under the respective nozzles 18 in the mounting plate 14 to admit cooling air to the springs.
  • I introduce hydraulic fluid to the back end of the main cylinder 46 via the line 54.
  • Ram 50 is driven toward the nozzle 13 and thus pushes the orifice gate 39 toward the nozzle and displaces the blank gate 38 from the gate-supporting levers 60 toward a removal position beyond the nozzle.
  • the blank gate acts against ram 53 and pushes the piston 51 into a retracted position within the auxiliary cylinder 47.
  • the back end of the piston 51 carries a cylindrical plug 74 (FIG. 3).
  • the back wall of cylinder 47 has a bore 75, which is adapted to receive plug 74, and with which the hydraulic line 56 communicates.
  • the back wall also has a restricted L-shaped passage 76 which affords the only communication between the interior of the cylinder and the bore 75 when plug 74 is received within the bore.
  • a screw 77 which is threadedly engaged with the cylinder wall, controls the effective cross-sectional area of passage 76.
  • the plug 74, bore 75, and passage 76 form a dashpot. I proportion the parts so that the plug first enters the bore when the orifice gate 39 reaches a slow-motion region in which it is supported on the gate-supporting levers 60 and its orifice 73 is nearing or partially under the nozzle 13.
  • the slow-motion region of an orifice gate extends at least from a position of the gate in which the nozzle is partially open, as shown in FIG.
  • I first remove the blank gate by the procedure already described, whereafter I introduce air to the front end of the main cylinder 46 via the line 55 and thus drive the piston 48 and ram 50 into a retracted position. I insert a new orifice gate into the ready position and next operate cylinder 46 to push the new gate into the slow-motion region on the gate-supporting levers 60, displacing the old orifice gate into its removal position. Alternatively, I may introduce hydraulic fluid to the back end of the auxiliary cylinder 47 and drive the blank gate back under the nozzle and the old orifice gate back to the ready position, from which I remove it sideways. I can then insert a new orifice gate into the ready position and proceed as originally described.
  • FIG. 8 is a graph which shows the relation between the flow rate and head of steel in a tundish (A) with the gate orifice 73 in an initial throttling position at the beginning of the slowmotion region, and (b) with the gate orifice in its fully open position.
  • the initial throttling position is with the circumference of the gate orifice 73 lying on the center of the orifice 42 in the top plate 41, that is, the effective area of the opening is about 40 percent of the area at the fully open position.
  • the abscissae of the graph represent the flow rate and the ordinates the head. In each instance, the flow rate is directly proportional to the head. With a given size of orifice and a given initial throttling position, I can produce a relation anywhere between the lines (A) and (B) of the graph.
  • FIG. 9 is a simplified diagram of the hydraulic and pneumatic circuits embodied in mymechanism.
  • the hydraulic circuit includes a tank 80 which contains hydraulic fluid.
  • a feed line 81 extends from the tank to a pump 82 and thence to-an inlet port of a four-way valve 83.
  • a return line 84 extends from an outlet port of the valve back to the tank.
  • the aforementioned hydraulic lines 54 and 56 extend from this valve to the main and auxiliary cylinder 46 and 47 respectively.
  • the pneumatic circuit includes a compressed air tank 85.
  • a feed line 86 extends from tank 85 to an inlet port of another four-way valve 87, which has an exhaust 88.
  • FIG. 9 shows the valves 83 and 87 in their neutral positions.
  • I wish to introduce hydraulic fluid to cylinder 46 or 47, I shift the movable element of valve 83 left or right respectively. Similarly, I shift the movable element of valve 87 to introduce air to either cylinder.
  • the circuit may include various refinements, not shown, such as filters, heaters, and accumulators.
  • the blank gate 38 illustrated has a gas-permeable plug 91 which is aligned with orifice 43 when the blank gate is positioned to close the vessel outlet.
  • I introduce gas to the base of nozzle 13 through the permeable plug to prevent skulls from forming and blocking the nozzle.
  • the inclusion of a permeable plug of course is optional, but when I include it, I prefer to conduct gas to the plug through a novel arrangement of passages, which are best shown in FIGS. 1 and 5 and which I shall now describe.
  • the mounting plate 14 has a passage 17 and an outlet port 170.
  • the top plate 42 has a horizontal passage 92 and inlet and outlet ports 92a and 92b communicating with this passage and extending through the top and bottom faces respectively.
  • the blank gate 38 has a horizontal passage 93, an inlet port 93a communicating with this passage and extending through the top face, and a circular passage 94 communicating with passage 93 and surrounding the permeable plug 91.
  • My novel arrangement of passages eliminates need for connecting a pipe or tube to a movable part of the mechanism to conduct gas to the plug, as has been the practice in the prior art.
  • a further advantage is that the gas is immediately and automatically shut off whenever the blank gate is displaced from the nozzle.
  • my novel arrangement of passages has general utility in gate-operating mechanisms which embody a mounting plate, a top plate, and a permeable plug in the slidable gate. Its use is not confined to the specific mechanism described herein.
  • the holder 34 is formed of a flat rectangular refractory block 99 and a metal frame 100 covering the side and end edges and bottom of the block.
  • the frame is fixed to the block with 'a layer of mortar 101.
  • the underside of the frame has a depending skirt 102 which receives the upper end of tube 98.
  • the skirt has four symmetrically arranged slots 103.
  • the upper portion of the tube has a surrounding metal band 104 and is grooved as indicated at 105. I insert a U-shaped wire clip 106 through the slots 103 and grooves to fix the pouring tube to the holder.
  • the block 99 has a central orifree 107 aligned with the tube bore.
  • the grooves 105 preferably extend through only relatively small arcs, whereby the tube is positioned automatically always in the same orientation with respect to the holder when the two parts are assembled. This is an important advantage where the tube has outlets 108 in its side walls, since it assures that these outlets are oriented properly with respect to a continuous casting mold. lf side outlets are not used, groove 105 may be continuous around the tube circumference. When either the holder or tube requires replacement, it can be replaced without replacing the other.
  • my invention affords a simple method and mechanism for operating slidable gates which control flow of liquid from a bottom-pour vessel and for using the orifice gate to throttle the pouring stream.
  • the invention enables gates or pouring tubes to be removed and replaced readily at any time.
  • Another feature is that the pouring tube is removably attached to its holder, yet always properly oriented.
  • An operating mechanism for slidable gates which are used to control flow of liquid from a bottom-pour vessel, said mechanism comprising a frame for attachment to the bottom of the vessel, gate-supporting means on said frame for slidably supporting blank and orifice gates for movement between a ready position, a slow-motion region under the vessel outlet, and a removal position beyond said slow-motion region, the slow-motion region of an orifice gate extending at least from a position of the gate in which the vessel outlet is partially open to a position in which it is fully open, and main and auxiliary drive means carried by said frame at opposite ends of the path of gate movement, said main drive means being adapted to push a gate from said ready position into said slow-motion region and to displace a gate already in said slow-motion region into said removal position, said auxiliary drive means including means for retarding the rate of movement of gates as they reach said slow-motion region, which lastnamed means permits an orifice gate to move rapidly from said ready position to said slow-motion region and thereafter slowly and under close control in either direction
  • a mechanism as defined in claim 1 comprising in addition means on said frame spaced below said gatesupporting means for supporting a pouring tube.
  • a mechanism as defined in claim 2 in which the means for supporting the pouring tube enables said main drive means to push a replacement pouring tube from a ready position into a position aligned with the vessel outlet, and to displace an old pouring tube from alignment with the outlet into a position from which it can be removed sideways.
  • main and auxiliary drive means include fluid pressure cylinders and pistons mounted at opposite ends of said frame, and opposed rams operated by said pistons.
  • a combination as defined in claim 6 further comprising a pouring tube carried by said mechanism below said gates.
  • a frame for attachment to the bottom of the vessel and including a plate and rails dependently supported from said plate;
  • said rails being adapted to support blank and orifice gates for movement between a ready position adjacent said first-named ram, a slow-motion region on said levers under the vessel outlet, and a removal position adjacent said second ram;
  • said first-named ram being adapted to push a gate from said ready position into said slow-motion region, and to displace a gate from the latter region to said removal position with said second ram in abutting relation with the displaced gate;
  • auxiliary cylinder for retarding the rate of movement of the gates as they reach said slow-motion region, whereby an orifice gate moves rapidly from said ready position to said slowmotion region and thereafter slowly and under close control in either direction to any teeming position within said slow-motion region.
  • a mechanism as defined in claim 9 in which the gates can be inserted sideways into their ready position and removed sideways from their removal position.
  • a combination as defined in claim 13 in which said mounting plate carries a plurality of depending lugs, and the frame of said mechanism includes a plate having holes matching and receiving said lugs, and pins fixing said frame to said lugs.
  • a method of controlling flow of liquid from a bottom-pour vessel comprising positioning a blank gate under the vessel outlet, hydraulically displacing the blank gate with an orifice gate, and during the displacing step moving the orifice gate rapidly from a ready position to a slow-motion region under the outlet and thereafter slowly moving the orifice gate under close control to a teeming position within the slowmotion region by retarding the gates with a dashpot in the hydraulic circuit, said slow-motion region of an orifice gate extending at least from a position of the gate in which the vessel outlet is partially open to a position in which it is fully open.
  • gate supporting means on said frame for slidably supporting blank and orifice gates for movement between a ready position, a position under the vessel outlet and for removal;
  • said orifice gate is movable rapidly from said ready position to a slow-motion region under the vessel outlet extending at least between a position in which the outlet is partially open and a position in which it is fully open;
  • said drive means is plural speed, and has means for moving said orifice gate at a first rapid speed from said ready position to said slow-motion region and means for moving said orifice gate at a second slow speed through said slow-motion region.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
US337252A 1973-03-01 1973-03-01 Operating mechanism for slidable gates and method of operating slide gate Expired - Lifetime US3866806A (en)

Priority Applications (36)

Application Number Priority Date Filing Date Title
US337252A US3866806A (en) 1973-03-01 1973-03-01 Operating mechanism for slidable gates and method of operating slide gate
AR252572A AR207440A1 (es) 1973-03-01 1974-01-01 Mecanismo operativo de compuertas corredizas
US432370A US3918613A (en) 1973-03-01 1974-01-10 Sliding gate having selectively operable gas line for porous plug
ZA00741121A ZA741121B (en) 1973-03-01 1974-02-20 Operating mechanism for slidable gates and flow-controlling method
BE141471A BE811663A (fr) 1973-03-01 1974-02-27 Mecanisme d'actionnement perfectionne pour tiroirs et procede de commande de debit
JP49023690A JPS5226743B2 (tr) 1973-03-01 1974-02-28
ES423714A ES423714A1 (es) 1973-03-01 1974-02-28 Perfeccionamientos en mecanismos de accionamiento para com-puertas deslizantes.
DE2409670A DE2409670C3 (de) 1973-03-01 1974-02-28 Vorrichtung zur Steuerung des Schmelzenausflusses aus einem mit einer Bodenausgußöffnung versehenen Gießgefäß
NLAANVRAGE7402759,A NL174434C (nl) 1973-03-01 1974-02-28 Bedieningsmechanisme voor schuiven ter beheersing van de vloeistofstroom uit een gietvat met een gietopening in de bodem.
CA193,750A CA992505A (en) 1973-03-01 1974-02-28 Operating mechanism for slidable gates and flow-controlling method
HUUE45A HU168703B (tr) 1973-03-01 1974-02-28
FI605/74A FI57887C (fi) 1973-03-01 1974-02-28 Anlaeggning foer reglering av vaetskestroemning
AT166174A AT340616B (de) 1973-03-01 1974-02-28 Schieberverschluss fur schmelzenbehalter
DE19742462292 DE2462292C3 (de) 1973-03-01 1974-02-28 Schieberverschluß am Bodenauslaß eines Gießgefäßes
BR741424A BR7401424D0 (pt) 1973-03-01 1974-02-28 Dispositivo de comporta deslizante
BR1422/74A BR7401422D0 (pt) 1973-03-01 1974-02-28 Mecanismo de operacao para comportas deslizantes, e processo para controle da vazao de liquido de um recipiente de descarga pelo fundo
NO740690A NO140044C (no) 1973-03-01 1974-02-28 Innretning for styring av uttapping av smelte fra en bunntappingsbeholder
FR7407152A FR2219815B1 (tr) 1973-03-01 1974-03-01
IE434/74A IE39420B1 (en) 1973-03-01 1974-03-01 Operating mechanism for slidable gates for controlling flow from a bottom pour vessel
TR18250A TR18250A (tr) 1973-03-01 1974-03-01 Suerguelue kapaklari calistirma mekanizmasi ve kayis kontrol usulue
YU530/74A YU39916B (en) 1973-03-01 1974-03-01 Device for dosing liquid metals
AR252573A AR211762A1 (es) 1973-03-01 1974-03-01 Compuerta corrediza con tapon permeable a los gases
GB4682476A GB1469413A (en) 1973-03-01 1974-03-01 Closure gates for pour vessel outlets
GB4682376A GB1469412A (en) 1973-03-01 1974-03-01 Slidable gate mechanism
GB944674A GB1469411A (en) 1973-03-01 1974-03-01 Operating mechanism for slidable gates and flow- controlling method
IT67557/74A IT1009191B (it) 1973-03-01 1974-03-06 Dispositivo di azionamento per sa racinesche scorrevoli per recipien ti di colata dei metalli e simili apparecchi
JP50008610A JPS50120431A (tr) 1973-03-01 1975-01-20
DK520375A DK144144C (da) 1973-03-01 1975-11-19 Gastilledningsarrangement til en gaspermeabel prop i et skydelukke til en stoebebeholder
SU752195603A SU969145A3 (ru) 1973-03-01 1975-12-09 Шиберный затвор сталеразливочного ковша
AT239676A AT340077B (de) 1973-03-01 1976-04-02 Schieberverschluss fur giessgefasse
IN973/CAL/76A IN143588B (tr) 1973-03-01 1976-06-05
AU65903/74A AU485647B2 (en) 1973-03-01 1976-06-15 Operating mechanism for slidable gates and flow-controlling method
NO772924A NO139513C (no) 1973-03-01 1977-08-23 Fremgangsmaate ved tapping av flytende metall fra en bunntappingsbeholder for aa hindre at beholderens tappemunnstykke blokkeres paa grunn av dannelse av stoerknet metallskall i eller ved tappeaapningen
FI773690A FI56323C (fi) 1973-03-01 1977-12-07 Gastillfoerselanordning i tillslutningsmekanism foer gjutkaerl
YU02574/80A YU257480A (en) 1973-03-01 1980-10-08 Non-porous gas-permeable closure for a ladle lip of a casting ladle
NLAANVRAGE8102914,A NL176759C (nl) 1973-03-01 1981-06-17 Gietvat voor gesmolten metaal.

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US337252A US3866806A (en) 1973-03-01 1973-03-01 Operating mechanism for slidable gates and method of operating slide gate

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US (1) US3866806A (tr)
JP (2) JPS5226743B2 (tr)
AR (2) AR207440A1 (tr)
AT (1) AT340616B (tr)
BE (1) BE811663A (tr)
BR (2) BR7401424D0 (tr)
CA (1) CA992505A (tr)
DE (1) DE2409670C3 (tr)
ES (1) ES423714A1 (tr)
FI (1) FI57887C (tr)
FR (1) FR2219815B1 (tr)
GB (1) GB1469411A (tr)
HU (1) HU168703B (tr)
IE (1) IE39420B1 (tr)
IT (1) IT1009191B (tr)
NL (1) NL174434C (tr)
NO (2) NO140044C (tr)
SU (1) SU969145A3 (tr)
TR (1) TR18250A (tr)
YU (2) YU39916B (tr)
ZA (1) ZA741121B (tr)

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US3990614A (en) * 1974-12-27 1976-11-09 Kurosaki Yogyo Co., Ltd. Method of regulating the flow of molten metal through the pouring opening of a vessel
US4000837A (en) * 1973-12-21 1977-01-04 United States Steel Corporation Sliding gate valves
US4077457A (en) * 1974-03-06 1978-03-07 Sumitomo Metal Industries Limited Molten metal pouring control method and apparatus for use in continuous casting equipment
DE2746265A1 (de) * 1976-10-15 1978-04-20 Uss Eng & Consult Schieberventil fuer ein giessgefaess
US4141478A (en) * 1976-05-08 1979-02-27 Stopinc Aktiengesellschaft Slide plate assembly
DE2938538A1 (de) 1978-09-25 1980-04-03 Uss Eng & Consult Absperrschieber
US4227630A (en) * 1977-07-15 1980-10-14 Didier-Werke Ag Sliding gates for metallurgical vessels
US4353484A (en) * 1980-03-11 1982-10-12 Crawford Iii Russell C Coffee filter with flow diverter
US4365731A (en) * 1977-01-27 1982-12-28 Didier-Werke, A.G. Refractory structures
US4383624A (en) * 1977-10-17 1983-05-17 General Refractories Company Slide gate
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
US4524956A (en) * 1981-05-19 1985-06-25 Stopinc Aktiengesellschaft Linear sliding closure unit
US4545512A (en) * 1981-01-19 1985-10-08 Uss Engineers & Consultants, Inc. Full throttle valve and method of tube and gate change
US4554035A (en) * 1977-10-17 1985-11-19 General Refractories Company Method of manufacturing a slide gate
US4693452A (en) * 1986-03-12 1987-09-15 Triten Corporation Valve
US4702460A (en) * 1983-12-16 1987-10-27 Didier-Werke Ag Reversible refractory plate in sliding closure unit and method for use thereof
US4940172A (en) * 1988-02-04 1990-07-10 Benz & Hilgers Gmbh Filling apparatus for filling a container with a measured amount of a liquid, pasty or lumpy product
US5011050A (en) * 1990-10-31 1991-04-30 Leco Corporation Stepped gate safety arrangement
US5174908A (en) * 1989-03-03 1992-12-29 Flo-Con Systems, Inc. Non-reversible sliding gate, valve and method
US5518154A (en) * 1994-11-17 1996-05-21 Usx Corporation Gate and pour tube assembly for use in throttling gate valve
US6059144A (en) * 1998-02-18 2000-05-09 Mann & Hummel Protec Gmbh Proportioning apparatus for pourable bulk material
US6622946B2 (en) * 2000-04-13 2003-09-23 Sieghard Schiller Gmbh & Co. Kg Device for coating workpieces
CN104806114A (zh) * 2015-02-06 2015-07-29 华东建筑设计研究院有限公司现代都市建筑设计院 一种手控、自控两用的窗户气动开启装置

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JPS534730A (en) * 1976-07-02 1978-01-17 Nippon Steel Corp Pouring flow control method by sliding speed change of sliding nozzle
JPS54166137U (tr) * 1978-05-15 1979-11-21
CH653269A5 (de) * 1981-06-01 1985-12-31 Metacon Ag Verfahren zum verhindern des einfrierens von metallischen schmelzen im auslaufkanal eines giessgefaesses.
US4474362A (en) * 1983-03-24 1984-10-02 Flo-Con Systems, Inc. Valve and method and components thereof
DE3512796C1 (de) * 1985-04-10 1986-02-06 Stopinc Ag, Baar Schiebereinheit in einem Schiebeverschluss
US5052598A (en) * 1989-03-03 1991-10-01 Flo-Con Systems, Inc. Sliding gate valve method and replaceable retractories
IE910080A1 (en) * 1990-01-16 1991-07-31 Flogates Ltd Metal pouring method and apparatus
CN101892356B (zh) * 2010-07-21 2012-05-30 中国重型机械研究院有限公司 吹氩保护系统
JP5643583B2 (ja) * 2010-09-10 2014-12-17 東京窯業株式会社 ガス吹き耐火物
CN104908994A (zh) * 2014-03-13 2015-09-16 浙江省嵊州市鸿达机械有限公司 牙签自动包装机的整料机构
DE102018205311A1 (de) * 2018-04-09 2019-10-10 Festo Ag & Co. Kg Diagnoseeinrichtung, System und Verfahren
CN113606205B (zh) * 2021-08-04 2023-09-15 盾构及掘进技术国家重点实验室 一种基于分布式主动柱塞的tbm撑靴装置

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US3618834A (en) * 1969-05-26 1971-11-09 United States Steel Corp Sliding gate closure for bottom-pour vessel removable as a unit
US3712518A (en) * 1969-10-13 1973-01-23 Interstop Ag Sliding gate nozzle for vessels used for pouring metals
US3730401A (en) * 1972-03-22 1973-05-01 Steel Corp Apparatus for supporting and operating a slidable gate and extended tube nozzle on a bottom-pour vessel
US3752363A (en) * 1971-11-12 1973-08-14 Dorn Plastic Machinery Co Van Control for injection molding machine

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US3253307A (en) 1964-03-19 1966-05-31 United States Steel Corp Method and apparatus for regulating molten metal teeming rates
US3352465A (en) * 1965-05-06 1967-11-14 United States Steel Corp Refractory closure member for bottom pour vessels
DE1938117U (de) 1966-02-19 1966-05-12 Hermann Zanker K G Maschinen U Waschmaschine.
US3465810A (en) 1967-12-04 1969-09-09 Sylvester Enterprises Inc Apparatus for casting metal
US3501068A (en) * 1968-05-21 1970-03-17 United States Steel Corp Bottom-pour teeming vessel with sliding gate and pouring tube
CH478613A (de) 1968-07-12 1969-09-30 Interstop Ag Schiebeverschluss für mit einer Bodenausgussöffnung versehene Behälter zum Giessen von flüssigen Metallen, insbesondere Stahl
US3581948A (en) * 1969-08-11 1971-06-01 Interstop Ag Sliding gate of a casting ladle for pouring liquid metals
JPS4922339A (tr) * 1972-06-22 1974-02-27

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Publication number Priority date Publication date Assignee Title
US3618834A (en) * 1969-05-26 1971-11-09 United States Steel Corp Sliding gate closure for bottom-pour vessel removable as a unit
US3712518A (en) * 1969-10-13 1973-01-23 Interstop Ag Sliding gate nozzle for vessels used for pouring metals
US3752363A (en) * 1971-11-12 1973-08-14 Dorn Plastic Machinery Co Van Control for injection molding machine
US3730401A (en) * 1972-03-22 1973-05-01 Steel Corp Apparatus for supporting and operating a slidable gate and extended tube nozzle on a bottom-pour vessel

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000837A (en) * 1973-12-21 1977-01-04 United States Steel Corporation Sliding gate valves
US4077457A (en) * 1974-03-06 1978-03-07 Sumitomo Metal Industries Limited Molten metal pouring control method and apparatus for use in continuous casting equipment
US3990614A (en) * 1974-12-27 1976-11-09 Kurosaki Yogyo Co., Ltd. Method of regulating the flow of molten metal through the pouring opening of a vessel
US4141478A (en) * 1976-05-08 1979-02-27 Stopinc Aktiengesellschaft Slide plate assembly
DE2746265A1 (de) * 1976-10-15 1978-04-20 Uss Eng & Consult Schieberventil fuer ein giessgefaess
FR2367569A1 (fr) * 1976-10-15 1978-05-12 Uss Eng & Consult Vanne coulissante
US4365731A (en) * 1977-01-27 1982-12-28 Didier-Werke, A.G. Refractory structures
US4227630A (en) * 1977-07-15 1980-10-14 Didier-Werke Ag Sliding gates for metallurgical vessels
US4383624A (en) * 1977-10-17 1983-05-17 General Refractories Company Slide gate
US4554035A (en) * 1977-10-17 1985-11-19 General Refractories Company Method of manufacturing a slide gate
DE2954583C2 (tr) * 1978-09-25 1991-05-29 Usx Engineers And Consultants, Inc., Pittsburgh, Pa., Us
DE2938538A1 (de) 1978-09-25 1980-04-03 Uss Eng & Consult Absperrschieber
US4415103A (en) * 1979-09-07 1983-11-15 Uss Engineers And Consultants, Inc. Full throttle valve and method of tube and gate change
US4353484A (en) * 1980-03-11 1982-10-12 Crawford Iii Russell C Coffee filter with flow diverter
US4545512A (en) * 1981-01-19 1985-10-08 Uss Engineers & Consultants, Inc. Full throttle valve and method of tube and gate change
US4524956A (en) * 1981-05-19 1985-06-25 Stopinc Aktiengesellschaft Linear sliding closure unit
US4702460A (en) * 1983-12-16 1987-10-27 Didier-Werke Ag Reversible refractory plate in sliding closure unit and method for use thereof
US4693452A (en) * 1986-03-12 1987-09-15 Triten Corporation Valve
US4940172A (en) * 1988-02-04 1990-07-10 Benz & Hilgers Gmbh Filling apparatus for filling a container with a measured amount of a liquid, pasty or lumpy product
US5174908A (en) * 1989-03-03 1992-12-29 Flo-Con Systems, Inc. Non-reversible sliding gate, valve and method
US5011050A (en) * 1990-10-31 1991-04-30 Leco Corporation Stepped gate safety arrangement
US5518154A (en) * 1994-11-17 1996-05-21 Usx Corporation Gate and pour tube assembly for use in throttling gate valve
US6059144A (en) * 1998-02-18 2000-05-09 Mann & Hummel Protec Gmbh Proportioning apparatus for pourable bulk material
US6622946B2 (en) * 2000-04-13 2003-09-23 Sieghard Schiller Gmbh & Co. Kg Device for coating workpieces
CN104806114A (zh) * 2015-02-06 2015-07-29 华东建筑设计研究院有限公司现代都市建筑设计院 一种手控、自控两用的窗户气动开启装置

Also Published As

Publication number Publication date
NO772924L (no) 1974-09-03
JPS50120431A (tr) 1975-09-20
AR207440A1 (es) 1976-10-08
NO740690L (no) 1974-09-03
ATA166174A (de) 1977-04-15
YU39916B (en) 1985-06-30
AT340616B (de) 1977-12-27
GB1469411A (en) 1977-04-06
BE811663A (fr) 1974-08-27
FR2219815B1 (tr) 1980-04-04
ES423714A1 (es) 1976-04-16
AR211762A1 (es) 1978-03-15
TR18250A (tr) 1976-11-10
IE39420B1 (en) 1978-10-11
NO139513B (no) 1978-12-18
NO139513C (no) 1979-03-28
SU969145A3 (ru) 1982-10-23
NL174434C (nl) 1984-06-18
ZA741121B (en) 1975-01-29
NL7402759A (tr) 1974-09-03
YU257480A (en) 1983-06-30
NO140044B (no) 1979-03-19
BR7401422D0 (pt) 1974-11-19
FR2219815A1 (tr) 1974-09-27
FI57887B (fi) 1980-07-31
IT1009191B (it) 1976-12-10
DE2409670A1 (de) 1974-09-12
FI57887C (fi) 1980-11-10
AU6590374A (en) 1975-08-28
BR7401424D0 (pt) 1974-11-19
HU168703B (tr) 1976-06-28
JPS5040429A (tr) 1975-04-14
IE39420L (en) 1974-09-01
YU53074A (en) 1982-02-28
DE2409670C3 (de) 1982-11-04
NO140044C (no) 1979-06-27
CA992505A (en) 1976-07-06
DE2409670B2 (de) 1977-11-10
JPS5226743B2 (tr) 1977-07-15

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