CN101879592B - Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same - Google Patents
Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same Download PDFInfo
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- CN101879592B CN101879592B CN 201010211602 CN201010211602A CN101879592B CN 101879592 B CN101879592 B CN 101879592B CN 201010211602 CN201010211602 CN 201010211602 CN 201010211602 A CN201010211602 A CN 201010211602A CN 101879592 B CN101879592 B CN 101879592B
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Abstract
The invention provides a straight-arm ladle rotary table used in horizontal continuous casting steel. The ladle rotary table comprises a rotary table anchorage piece, a base, a large bearing, a rotary transmission device, a rotary arm, ladle seats, ladle covers and two ladle covering devices symmetrically arranged on the rotary arm. The rotation of the rotary arm and the ladle covers is driven by a motor, the braking of the rotary arm and the lifting of the ladle covers are driven by a hydraulic motor, and the two ladle covers can be lifted and rotated respectively. The rotary arm is a straight arm, and the rotary arm does not lift and can infinitely rotate 360 degrees. The invention also provides a method for exchanging ladles by adopting the ladle rotary table. The method comprises that: a to-be-cast ladle and a cast ladle are hoisted in and out of the two ladle seats of the same rotary table in turn respectively; before casting of molten steel in the last ladle is finished, the next molten steel refined ladle is hoisted in the other ladle seat; and when the casting of the molten steel in the last ladle is finished, the rotary table rotates 180 degrees, the last ladle leaves a casting position, the next ladle reaches the casting position, and the molten steel is cast in the middle ladle.
Description
Technical field
The present invention relates to ladle turret and the method for exchange ladle, particularly the straight arm type ladle turret of horizontal continuity cast steel use of using in a kind of continuous casting steel machine and the method that adopts this ladle turret exchange ladle.
Background technology
The apparatus arrangement such as the tundish of horizontal caster, crystallizer, Blank drawing machine are on horizontal plane.The horizontal caster of producing the small dimension strand generally adopts medium-frequency induction furnace to pass through tube connector, eseparation ring directly and the crystallizer connection; And the horizontal caster of the larger specification strand of production is generally by pouring into tundish behind electric arc furnace smelting molten steel, the process ladle furnace refining (molten steel that quality requirement is high also needs application of vacuum), tundish is removable, tundish is carried to crystallizer the place ahead by tundish car when preparing throwing, connects by middle water containing opening and slide plate, crystallizer slide plate and the mouth of a river, eseparation ring and crystallizer.The factory building space of horizontal casting production line is less, and refining and cast are in same striding.The production line that production capacity is less generally adopts the traveling crane ladle to basket pouring, and it is long and have a potential safety hazard then to take running time; The production line that production capacity is larger generally adopts traveling crane ladle seat on fixing support, the problem of existence be need two simultaneously operations of driving finish the ladle exchange and the time longer, in addition, the ladle support need to take larger factory building space.
At present circular-arc type continuous casting machine carrying ladle and realize two ladles fast the exchange equipment that waters steel mainly be the butterfly ladle turret, large because of the arc radius of circular-arc type continuous casting machine, require the factory building space high.And the apparatus arrangement such as the tundish of horizontal caster, crystallizer, Blank drawing machine are on horizontal plane, the factory building space is less, and refining and cast are in same striding, if adopt the butterfly ladle turret in horizontal casting, it can only be arranged in the middle of the casting bay, need to take larger factory building space.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art and a kind of straight arm type ladle turret that uses in horizontal continuity cast steel is provided and adopts the method for this ladle turret exchange ladle, to reduce the time of ladle exchange in the horizontal casting sequence casting process.
Technical scheme of the present invention is: a kind of straight-arm type horizontal continuous casting ladle turret, it comprises panoramic table anchoring piece, base, large bearing, slewing gear, revoliving arm, ladle seat, ladle claims and two symmetries are located at ladle stamp device on the revoliving arm.
Given tensile load is very large in the panoramic table work, and the panoramic table anchoring piece forms a large welded structures spare by foundation bolt, anchoring piece, protective cover, guide ring.The panoramic table anchoring piece is imbedded in the panoramic table basis.
The large bearing of base support and transmit various load in the basis, also be the supporting mass of revoliving arm, base is large welded structures spare, profile is the cylinder table shape, bottom centre is welded with the bearing of supporting swivel joint.The flange in the bottom of base connects with high-strength bolt with basic connection, upper flange and large bearing inner ring with foundation bolt.
Large bearing has three row rollers, can bear and transmit vertical load, horizontal loading and tilting moment.
Slewing gear is comprised of alternating-current variable frequency motor, liquid braking device, shaft coupling, main reducing gear, pinion, the gear ring engagement of pinion and large bearing.
Revoliving arm is the most key stressed member of panoramic table, it also is the supporting mass of ladle stamp device, the load of rotating part is delivered to large bearing, it is welding structural element maximum on the panoramic table, revoliving arm is straight arm type, the arm two ends are " H " type, and are welded with high and low block, are used for supporting, location ladle.Not lifting of revoliving arm can be carried out 360 ° of unlimited rotaries.The revoliving arm lower flange connects with high-strength bolt with large outer race.Ladle seat and ladle claim employing to be bolted to the revoliving arm two ends.
The ladle stamp device comprises column, connects pivoted arm, Electrohydraulic push rod, column, connection pivoted arm, Electrohydraulic push rod connect as a whole, the steel ladle cover lifting is with Electrohydraulic push rod and be connected pivoted arm and pass through the spherical joint bearing and link to each other with column, boatswain chair on the steel ladle cover adopts draw-in groove to connect with being connected pivoted arm, and is convenient with driving lifting and maintenance.Two root posts of ladle stamp device are fixed on the revoliving arm with the bolt symmetry by turntable bearing and base flange.The steel ladle cover revolution is fixed on the pedestal of column with reducing motor, and the steel ladle cover revolution makes the steel ladle cover revolution with the pinion on the reducing motor output shaft and the elevating arc engagement that is fixed on the column.
The rotation of revoliving arm, steel ladle cover is by motor-driven, and revoliving arm braking and steel ladle cover lifting are by hydraulic-driven, and two steel ladle covers can be distinguished lifting and rotation.
Water that tundish car is carried to horizontal caster throwing position with tundish before the steel, the ladle seat can begin to water the steel throwing on the revoliving arm and rotate to above the tundish.
The present invention also provides a kind of method that adopts above-mentioned ladle turret exchange ladle, it is two ladle seats that in turn ladle to be cast and casting complete ladle hung in respectively and hang out same panoramic table, before pouring molten steel is finished in a upper ladle, next ladle that liquid steel refining is finished hangs in another ladle seat, during a upper ladle molten steel casting complete, panoramic table Rotate 180 °, a upper ladle leave the cast position, next ladle arrives the cast position, and molten steel is poured in the tundish.
Its concrete operation step is as follows:
Before A, the ladle that liquid steel refining is finished hang ladle turret, after being installed, slide gate mechanism hangs in another ladle seat;
When B, lower slag checkout gear point out a cast position ladle molten steel to water, close immediately slide gate nozzle, extract lower slag test plug, take off Argon ring and protective casing;
C, start panoramic table Rotate 180 °, next ladle arrives the cast position, installs immediately Argon ring and protective casing, insert lower slag test plug, open slide gate nozzle, molten steel is poured in the tundish, extract again the ladle argon-blown pipe, then be rotated in place and drop to steel ladle cover on the ladle;
D, position to be poured steel ladle cover is risen and outward winding, hang out ladle, take off slide gate mechanism, for subsequent use behind ladle deslagging, the cleaning mouth of a river.
Described protective casing the rim of a bowl adds asbestos washer and cooperates with collector nozzle of ladle, and the Argon ring is placed on protective casing the rim of a bowl, to reduce secondary oxidation of steel.In the panoramic table rotary course, use with can continuing behind the oxygen cleaning protective casing, but asbestos washer needs every stove to change.
Open when watering the mouth of a river and all open, in time adjust slide mechanism in the casting process and guarantee that the height of molten steel face in the tundish is with continuously and stably cast.Open and stop the blowing argon gas stirring when watering in the ladle and add a cover to reduce the molten steel heat loss at ladle.
The mode that the present invention and ladle of the prior art water steel with traveling crane or seat at fixing support is compared has following features:
That 1, uses that a driving can realize ladle to be poured and casting complete ladle hangs in and hangs out the ladle turret device, and finishes fast the exchange of two ladle positions, safe and reliable.
2, ladle turret device revoliving arm need not arrange elevating mechanism, and the radius of gyration is less, and is simple in structure, easy to maintenance.
3, realize the quick exchange of ladle, reduced the time of ladle exchange in the horizontal casting sequence casting process, guaranteed the stable of the interior liquid steel level of tundish, created condition for many stoves water steel continuously.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Accompanying drawing 1 is straight-arm type horizontal continuous casting ladle turret structural representation provided by the invention;
Accompanying drawing 2 is the structural representation of panoramic table anchoring piece;
Accompanying drawing 3 is the structural representation of slewing gear;
Accompanying drawing 4 is the structural representation of the A section ladle stamp slewing gear in the accompanying drawing 1.
The specific embodiment
As shown in drawings: a kind of straight-arm type horizontal continuous casting ladle turret, it comprises that panoramic table anchoring piece 1, base 2, large bearing 3, slewing gear 4, revoliving arm 5, ladle seat 6, ladle claim 7 and two symmetries to be located at the ladle stamp device 8 on the revoliving arm 5.
Given tensile load is very large in the panoramic table work, and panoramic table anchoring piece 1 forms a large welded structures spare by foundation bolt 1-1, anchoring piece 1-2, protective cover 1-3, guide ring 1-4.Panoramic table anchoring piece 1 is imbedded in the panoramic table basis.
The base 2 large bearings 3 of supporting and transmit various load in the basis, also be the supporting mass of revoliving arm 5, base 2 be large welded structures spare, profile is the cylinder table shape, bottom centre is welded with the bearing that supports swivel joint.The flange in the bottom of base 2 connects with high-strength bolt with basic connection, upper flange and large bearing 3 interior rings with foundation bolt.
Large bearing 3 has three row rollers, can bear and transmit vertical load, horizontal loading and tilting moment.
Revoliving arm 5 is the most key stressed members of panoramic table, it also is the supporting mass of ladle stamp device 8, the load of rotating part is delivered to large bearing 3, it is welding structural element maximum on the panoramic table, revoliving arm 5 is straight arm type, the arm two ends are " H " type, and are welded with high and low block, are used for supporting, location ladle 10.Revoliving arm 5 not liftings can be carried out 360 ° of unlimited rotaries.Revoliving arm 5 lower flange connect with high-strength bolt with large bearing 3 outer shrouds.Ladle seat 6 and ladle claim 7 employings to be bolted to revoliving arm 5 two ends.
Ladle stamp device 8 comprises column 8-1, connects pivoted arm 8-2, Electrohydraulic push rod 8-3, column 8-1, connection pivoted arm 8-2, Electrohydraulic push rod 8-3 connect as a whole, steel ladle cover 9 liftings are with Electrohydraulic push rod 8-3 and be connected pivoted arm 8-2 and pass through the spherical joint bearing and link to each other with column 8-1, boatswain chair on the steel ladle cover 9 adopts draw-in groove to connect with being connected pivoted arm 8-2, and is convenient with driving lifting and maintenance.Two root post 8-1 of ladle stamp device 8 are fixed on the revoliving arm 5 with the bolt symmetry by turntable bearing 8-7 and base flange 8-8.Steel ladle cover 9 revolutions are fixed on the pedestal of column 8-1 with reducing motor 8-4, and steel ladle cover 9 revolutions make steel ladle cover 9 revolutions with the pinion 8-5 on the reducing motor 8-4 output shaft with the elevating arc 8-6 engagement that is fixed on the column 8-1.
The rotation of revoliving arm 5, steel ladle cover 9 is by motor-driven, and revoliving arm 5 brakings and steel ladle cover 9 liftings are by hydraulic-driven, and two steel ladle covers 9 can be distinguished lifting and rotation.
Water that tundish car 12 is carried to horizontal caster throwing position with tundish 11 before the steel, 10 of ladles can begin to water the steel throwing on the revoliving arm 5 and rotate to above the tundish 11.
Hengyang Hualing Continous Rolled Pipe Co., Ltd. is at 45t ladle refining furnace → 1,2 45t electric furnace → 3 a double ladle vacuum degassing furnace → 3 two-shipper double fluid horizontal casting production line upper strands, single stove tap 45t, the equipment such as the refining furnace of production usefulness, vacuum drying oven, horizontal casting tundish all are arranged in casting bay, with SLD-140 type horizontal caster cast ∮ 110～∮ 180mm specification strand, be the 60min/ stove average period.Arrange and technological requirement in conjunction with horizontal casting production line plant and equipment, adopt straight-arm type horizontal continuous casting ladle turret provided by the invention, its main equipment parameters such as table 1.
Table 1
When beginning to pour into a mould, the panoramic table position of precoating is hung next Baogang's water in driving in advance, treat that Baogang's water has watered, start the panoramic table Rotate 180 and ° namely finish the exchange of two Baogang's water, time can be controlled in the 2min, the average temperature drop of molten steel reduces to 0.35 ℃/min by 0.49 ℃/min before and after the ladle stamp, has created condition for reducing molten steel overheat, raising slab quality and vehicling operation rate.
Its concrete operation step is as follows:
Before A, the ladle that liquid steel refining is finished hang ladle turret, after being installed, slide gate mechanism hangs in another ladle seat;
When B, lower slag checkout gear point out a cast position ladle molten steel to water, close immediately slide gate nozzle, extract lower slag test plug, take off Argon ring and protective casing;
C, start panoramic table Rotate 180 °, next ladle arrives the cast position, installs immediately slag test plug under Argon ring and protective casing, the insertion, opens slide gate nozzle, and molten steel is poured in the tundish, extract again the ladle argon-blown pipe, then be rotated in place and drop to steel ladle cover on the ladle;
D, position to be poured steel ladle cover is risen and outward winding, hang out ladle, take off slide gate mechanism, for subsequent use behind ladle deslagging, the cleaning mouth of a river.
Described protective casing the rim of a bowl adds asbestos washer and cooperates with collector nozzle of ladle, and the Argon ring is placed on protective casing the rim of a bowl, to reduce secondary oxidation of steel.In the panoramic table rotary course, use with can continuing behind the oxygen cleaning protective casing, but asbestos washer needs every stove to change.
Open when watering the mouth of a river and all open, in time adjust slide mechanism in the casting process and guarantee that the height of molten steel face in the tundish is with continuously and stably cast.Open and stop the blowing argon gas stirring when watering in the ladle and add a cover to reduce the molten steel heat loss at ladle.
Claims (3)
- One kind in horizontal casting the exchange ladle method, it is characterized in that: it is two ladle seats that in turn ladle to be cast and casting complete ladle hung in respectively and hang out same panoramic table, before pouring molten steel is finished in a upper ladle, next ladle that liquid steel refining is finished hangs in another ladle seat, during a upper ladle molten steel casting complete, panoramic table Rotate 180 °, a upper ladle leave the cast position, next ladle arrives the cast position, molten steel is poured in the tundish, and its concrete operation step is as follows:Before A, the ladle that liquid steel refining is finished hang ladle turret, after being installed, slide gate mechanism hangs in another ladle seat;When B, lower slag checkout gear point out a cast position ladle molten steel to water, close immediately slide gate nozzle, extract lower slag test plug, take off Argon ring and protective casing;C, start panoramic table Rotate 180 °, next ladle arrives the cast position, installs immediately slag test plug under Argon ring and protective casing, the insertion, opens slide gate nozzle, and molten steel is poured in the tundish, extract again the ladle argon-blown pipe, then be rotated in place and drop to steel ladle cover on the ladle;D, position to be poured steel ladle cover is risen and outward winding, hang out ladle, take off slide gate mechanism, for subsequent use behind ladle deslagging, the cleaning mouth of a river.
- According to claim 1 a kind of in horizontal casting the exchange ladle method; it is characterized in that: described protective casing the rim of a bowl adds asbestos washer and cooperates with collector nozzle of ladle; the Argon ring is placed on protective casing the rim of a bowl; to reduce secondary oxidation of steel; in the panoramic table rotary course; use with can continuing behind the oxygen cleaning protective casing, but asbestos washer needs every stove to change.
- According to claim 1 and 2 a kind of in horizontal casting the exchange ladle method, it is characterized in that: open when watering the mouth of a river and all open, the timely height of adjusting molten steel face in the slide mechanism assurance tundish stops the blowing argon gas stirring and adds a cover to reduce the molten steel heat loss at ladle to pour into a mould continuously and stably, to open in the casting process in the ladle when watering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010211602 CN101879592B (en) | 2010-06-25 | 2010-06-25 | Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same |
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| CN 201010211602 CN101879592B (en) | 2010-06-25 | 2010-06-25 | Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same |
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| CN101879592B true CN101879592B (en) | 2013-03-20 |
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