CN102554207A - Sliding water gap device capable of preventing vortex - Google Patents
Sliding water gap device capable of preventing vortex Download PDFInfo
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- CN102554207A CN102554207A CN201210013684XA CN201210013684A CN102554207A CN 102554207 A CN102554207 A CN 102554207A CN 201210013684X A CN201210013684X A CN 201210013684XA CN 201210013684 A CN201210013684 A CN 201210013684A CN 102554207 A CN102554207 A CN 102554207A
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- vortex
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- filling pipe
- water gap
- nozzle device
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Abstract
The invention discloses a sliding water gap device capable of preventing vortex. The sliding water gap device comprises an upper water gap, an upper sliding plate fixedly connected to the bottom of the upper water gap, a middle sliding plate which is connected with the upper sliding plate and capable of doing reciprocating motion in a horizontal direction, a lower sliding plate connected with the middle sliding plate and a lower water gap fixedly connected with the lower sliding plate, wherein a sealed cover plate is arranged on the top of the upper water gap; an opening is formed at the bottom of the upper water gap; a vertical middle hole is formed in the upper water gap; a plurality of circular side holes with the same shape and size are uniformly formed in the side face of the upper water gap and communicated with the middle hole; longitudinally perforative inner holes are formed in the middles of the upper sliding plate, the middle sliding plate, the lower sliding plate and the lower water gap; and the inner holes and the middle hole form steel liquid flow channels. According to the sliding water gap device, the residual steel quantity in a casting container can be reduced, the metal yield can be increased, and involved slag and air can be reduced.
Description
Technical field
The relevant a kind of slide gate nozzle structure that casts continuously in the technology of the present invention is meant the sliding nozzle device of installing on a kind of continuous casting tundish or the ladle that can prevent vortex arising especially.
Background technology
Along with the fast development of process for making technology and high efficiency continuous casting, the slide gate nozzle system becomes more and more important in the steel smelting procedure in modern times, has become indispensable part in the smelting.It is the control device of molten steel in the conticaster casting cycle; Can accurately regulate molten steel flow from ladle to the continuous casting tundish; Also be usually used in controlling tundish and flow into the molten steel flow in the crystallizer, make the molten steel that flows into and flow out reach balance, thereby make continuous casting operation control more easily.The slide gate nozzle system is good, easy to loading and unloading, safe and reliable and can improve advantages such as STEELMAKING PRODUCTION efficient and obtained developing rapidly because of its controllability.Now, on ladle and tundish, generally used the slide gate nozzle system both at home and abroad.
When continuous pouring, generally the slide gate nozzle structure vertically is installed on the bottom of ladle or tundish, and sliding plate brick is slided through slide mechanism, thus the size that molten steel flow is regulated in the switching in drive steel hole.Link to each other with ladle or tundish bottom because slide gate nozzle is suitable for reading, and form through-type molten steel channel, therefore; In the cast latter stage of ladle and tundish; Along with the reduction of molten steel face, can produce a kind of important flow phenomenon, the vortex that confluxes that place, Here it is mouth of a river molten steel produces when flowing out.Know also that by practical experience when liquid is flowed downward by vertical outlet, when liquid level is lower than a certain critical altitude, above outlet, can form the vortex funnel, vortex promptly confluxes.The vortex that confluxes that molten steel outflow process forms can be involved in molten steel inside to the covering slag of liquid level and steel inclusion, even be involved in air, increases secondary oxidation, the quality of severe exacerbation steel.In continuous pouring and when changing ladle, before and after often taking place in the steel billet of ladle bonding pad the field trash index rise, this has substantial connection with conflux vortex volume slag and secondary oxidation.In basket pouring at the end, also can produce the vortex that confluxes, and the phenomenon that slag mixes volume occur, cause the tail base of cast seriously to demote or declare uselessly, reduce recovery rate of iron.
Even to this day, existing many research work confluxing the vortex phenomenon and launch in the metallurgical tank.Research shows that the factor that influences the vortex that confluxes has following several respects: 1) time of repose; The liquid that injects the molten bath vortex time retardation, critical altitude decline occur after leaving standstill after a while.2) inject flow path direction; Time of repose more in short-term, to form the critical altitude of vortex lower for fluid when axially injecting, it is big that critical altitude is injected in the tangential, when time of repose was longer, the two difference was little.3) go out the head piece degree of eccentricity; The center is flowed out and is generated vortex early, the difficult vortex that forms of eccentric outflow.4) outlet diameter; Outlet diameter increases can significantly increase the trend that vortex occurs.5) rising of liquid level or decline; Vortex appears in liquid level more easily when rising; 6) shape of stopper; Smaller with the stopper cast vortex critical altitude when pour into a mould with slide gate nozzle, this is because stopper increases the resistance that is flowed in the tangential, but acts on limitedly, and vortex will be along generation around the stopper.7) blow in the mouth of a river; Introduce gas jet, the generation of deferrable vortex around at the mouth of a river vertically.8) level is effluented; Since the effect of viscous force, level only effluent center line of discharge place horizontal plane and on lower wall surface big velocity gradient is arranged, the vertical speed gradient is little, so can not produce vortex.There was the vortex phenomenon outlet top when level of in fact also never observing was effluented.
Under the prior art condition,, also be difficult to accurately to judge slide gate nozzle top occur the confluxing critical liquid level of vortex to adopting the slide gate nozzle structure to control the big bag and the tundish of stream.For the vortex that prevents to conflux causes the volume slag, often take the passive measure of excessive surplus steel in the production scene, just close slide gate nozzle during critical liquid level that the molten steel face is higher than that vortex produces in container, can be left a large amount of remaining molten steel like this, reduce recovery rate of iron.Along with the development of automation detection means, the means that also can adopt down slag to detect, to be checked measuring when vortex is rolled up slag closed the mouth of a river again, but still can stay many residual steel like this, and recovery rate of iron is not high.At present ideal method is the critical altitude that adopts the vortex control device fundamentally to reduce to conflux vortex to produce, and postpones the appearance of vortex or suppresses the formation of through funnel-form vortex, thereby reduce vortex volume slag.Up to now, comparatively common a kind of way valve method of swimming is exactly promptly put the valve that swims above sprue gate, and valve body density is between molten steel and slag, and valve body constantly reduces with liquid level, can suppress the formation of vortex and stop being involved in of bits.Certainly; Also can above the mouth of a river, add the formation that fixture suppresses vortex; Like the one Chinese patent application publication number be disclosure of the Invention a kind of of CN 101844223A prevent tundish produce the structure of eddy flow, patent of invention that the Chinese patent publication number is CN1067597A disclosed a kind of prevent ladle and middle pot drainage opening effluent in device, the Chinese patent publication number of volume slag be that two utility models of CN201140272 and CN201735774U disclose the device of eliminating vortex; Its basic principle be all above the mouth of a river or oblique upper retention device is set; Increase the degree of eccentricity that head piece, the formation of vortex reduces the suction of bits and air thereby inhibition is confluxed.But, comprise the valve method of swimming in these interior inhibition methods, all can not stop the vertical inflow of molten steel directly over the mouth of a river fully; Therefore the effect of vortex of suppressing to conflux not is very good, and these methods all need be added extra device in molten steel; Will inevitably increase refractory material purchase cost and manufacturing cost, simultaneously, the device that these refractory materials are made in molten steel through constantly washing away; Also can drop in the molten steel; Thereby the inclusion content in the increase steel reduces the strand degree of purity, worsens slab quality.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of and can effectively eliminates the vortex that confluxes of cast container outlet, the sliding nozzle device that prevents the vortex generation of raising slab quality.
For achieving the above object; The present invention provides a kind of sliding nozzle device that prevents that vortex from producing; The upper slide that it includes filling pipe end from top to bottom, be fixedly connected with this filling pipe end bottom, is connected with this upper slide and the middle slide plate that the ability along continuous straight runs is reciprocating, the lower skateboard that is connected with this middle slide plate reach the following mouth of a river that is fixedly connected with this lower skateboard; This filling pipe end top is provided with the cover plate of sealing, this filling pipe end bottom opening, and this filling pipe end inside is formed with vertical mesopore; This filling pipe end side is evenly distributed with the side opening of the identical circle of a plurality of size shape; This side opening communicates with mesopore, and the centre at this upper slide, middle slide plate, lower skateboard and the following mouth of a river all is provided with the endoporus that runs through up and down, and each endoporus and this mesopore form the Molten Steel Flow passage.
Said filling pipe end is fixed together with the brick cup of cast container bottoms, and the bottom of said filling pipe end is positioned at the lower surface place of this brick cup, and the outside below of this cast container all is fixed at said upper slide, middle slide plate, lower skateboard and the following mouth of a river.
Said side opening is four, and the central axis of adjacent two side openings is 90 ° of angles, and the vertical center line of the said filling pipe end in two side holes edge axisymmetricly relatively.
Said side opening is on the circumference sustained height.
Said side opening is along the wall and the horizontal direction parallel of circumference.
Said side opening is concordant with the lower surface of said cover plate along the peak of the wall of circumference, and said side opening is higher than the upper surface of said brick cup along the minimum point of the wall of circumference.
Said side opening along the upper level difference of the minimum point of the wall of circumference and said brick cup less than 10mm.
Each said endoporus size shape is identical.
Said filling pipe end is the square of cylinder or band chamfering.
Said mesopore is shaped as the square bodily form cylindrical or that have chamfering.
The present invention has following beneficial effect with respect to prior art:
1, this sliding nozzle device end face sealing; Make the molten steel side opening inflow of four levels from the side; Both can the stream stock be loose, the molten steel along continuous straight runs is flowed into, the vortex that confluxes of outlet top, the very effective inhibition mouth of a river; Can prevent being involved in of liquid level covering slag and air, effectively improve slab quality.
2 because therefore the effect of entrainmenting of adopting the vortex that when liquid level is low, also can not occur behind this slide gate nozzle confluxing to cause can finish the molten steel cast in the cast container, and the residual steel amount that has reduced cast latter stage improves recovery rate of iron.
3 sliding nozzle devices are simple and reliable for structure, easy to make, need can effectively not suppress the vortex that confluxes by other device, reduced refractory consumption rate, reduced production cost.
Description of drawings
Fig. 1 is slide plate of the present invention mouth of a river device and the sectional view of pouring into a mould the container installation;
Fig. 2 is the filling pipe end side cross-sectional, view among the present invention;
Fig. 3 is along the whole profile of the filling pipe end of A-A line among Fig. 2.
The specific embodiment
For ease of structure of the present invention and the effect that reaches are had further understanding, combine the accompanying drawing preferred embodiment that develops simultaneously to specify as follows at present.
Extremely shown in Figure 3 like Fig. 1; Sliding nozzle device of the present invention includes filling pipe end 1, the upper slide 2 with the fixed connection of filling pipe end bottom, the middle slide plate 3 that is connected with upper slide 2, the lower skateboard 4 that is connected with middle slide plate 3 and the following mouth of a river 5 that is fixedly connected with lower skateboard 4 from top to bottom; Filling pipe end 1 is fixed together with the brick cup 60 of cast container 6 bottom surfaces, and the bottom of this filling pipe end 1 is positioned at the lower surface place of brick cup 60.The optimum shape of filling pipe end 1 is a cylinder, in particular cases, also can be the square of band chamfering.The end face of filling pipe end 1 is provided with the cover plate 10 of sealing, and this filling pipe end 1 inner hollow forms vertical mesopore 11, and filling pipe end 1 side is evenly distributed with the side opening 12 of the identical circle of a plurality of size shape, and this side opening 12 communicates with mesopore 11.Side opening 12 is four among the present invention; The central axis of adjacent two side openings 12 is 90 ° of angles; Relatively two side holes 12 along the vertical center line of filling pipe end 1 axisymmetricly, four side openings 12 on the circumference sustained height, can guarantee that so molten steel flows into mesopores by side opening 12 after; Mobile symmetry when the different directions molten steel flows into prevents the vortex that flows and cause because of asymmetric.Side opening 12 is straight along the wall of circumference, with horizontal direction parallel, to guarantee the horizontal guide functions to molten steel.Side opening 12 is concordant with the lower surface of cover plate 10 along the peak of the wall upper edge of circumference; Side opening 12 is higher than the upper surface of brick cup 60 along the wall lower edge minimum point of circumference; But in order to make the residual steel amount in the cast container 6 less, the minimum point of side opening 12 wall lower edges and the upper level difference of brick cup 60 are less than 10mm.Filling pipe end 1 inner mesopore 11 is through to filling pipe end 1 bottom from cover plate 10 lower surfaces that seal always, filling pipe end 1 bottom opening, and these mesopore 11 shapes can also can be the square bodily form with chamfering for cylindrical.Filling pipe end 1 links to each other with upper slide 2, and the junction meshes together with the face that tilts.Below the upper slide 2 be middle slide plate 3, is lower skateboard 4 below the middle slide plate 3, and lower skateboard 4 lower ends link to each other with the following mouth of a river 5, and the junction also is that the face with inclination meshes together.Upper slide 2 is fixing with lower skateboard 4, and middle slide plate 3 is can along continuous straight runs reciprocating.
The centre at upper slide 2, middle slide plate 3, lower skateboard 4 and the following mouth of a river 5 all has the endoporus that runs through up and down among the present invention; And connect together with the mesopore 11 of filling pipe end 1, forming vertical Molten Steel Flow passage, the size shape of variant parts junction endoporus is identical; When middle slide plate 3 is opened fully; Adjacent two endoporus consistencies from top to bottom, the long-pending nothing sudden change of Vertical Channel lateral cross section from top to bottom is to guarantee the maximum stream flow of molten steel.When cast, can move back and forth middle slide plate 3 through level and control the area of molten steel channel connection up and down, and reach the purpose of damming with throttling.All be closely to link to each other between said filling pipe end 1, upper slide 2, middle slide plate 3, lower skateboard 4 and the following mouth of a river 5, do not allow the inflow of molten steel.Said upper slide 2, middle slide plate 3, lower skateboard 4 and the following mouth of a river 5 all are the outside belows that are fixed on cast container 6 by mechanical framework, and wherein middle slide plate 3 can be made horizontal reciprocating movement, and remaining part all is completely fixed.Said filling pipe end 1, upper slide 2, middle slide plate 3, lower skateboard 4, the mouth of a river 5 all is to pass through hydrostatic pressing by different refractory materials with brick cup 60 down.Said brick cup 60 place mats can place mat rectangularity or circular around below the side opening 12 of filling pipe end 1.Between said filling pipe end 1 and the brick cup 60 if any the slit, then with the refractory material padding and compacting, to prevent the infiltration of molten steel.Said cast container 6 can be big bag in actual production, also can be tundish.
Above disclosedly be merely preferred embodiment of the present invention; Certainly can not limit protection scope of the present invention with this; Therefore the equivalence of doing according to claims of the present invention changes, and still belongs to protection scope of the present invention like change and the improvement that technological parameter or device are made.
Claims (10)
1. sliding nozzle device that prevents that vortex from producing; It is characterized in that; The upper slide that it includes filling pipe end from top to bottom, be fixedly connected with this filling pipe end bottom, is connected with this upper slide and the middle slide plate that the ability along continuous straight runs is reciprocating, the lower skateboard that is connected with this middle slide plate reach the following mouth of a river that is fixedly connected with this lower skateboard; This filling pipe end top is provided with the cover plate of sealing, this filling pipe end bottom opening, and this filling pipe end inside is formed with vertical mesopore; This filling pipe end side is evenly distributed with the side opening of the identical circle of a plurality of size shape; This side opening communicates with mesopore, and the centre at this upper slide, middle slide plate, lower skateboard and the following mouth of a river all is provided with the endoporus that runs through up and down, and each endoporus and this mesopore form the Molten Steel Flow passage.
2. the sliding nozzle device that prevents that vortex from producing as claimed in claim 1; It is characterized in that; Said filling pipe end is fixed together with the brick cup of cast container bottoms; The bottom of said filling pipe end is positioned at the lower surface place of this brick cup, and the outside below of this cast container all is fixed at said upper slide, middle slide plate, lower skateboard and the following mouth of a river.
According to claim 1 or claim 2 prevent the sliding nozzle device that vortex produces, it is characterized in that said side opening is four, the central axis of adjacent two side openings is 90 ° of angles, two side holes is along the vertical center line of said filling pipe end axisymmetricly relatively.
4. the sliding nozzle device that prevents that vortex from producing as claimed in claim 3 is characterized in that said side opening is on the circumference sustained height.
5. the sliding nozzle device that prevents that vortex from producing as claimed in claim 3 is characterized in that said side opening is along the wall and the horizontal direction parallel of circumference.
6. the sliding nozzle device that prevents that vortex from producing as claimed in claim 3 is characterized in that said side opening is concordant with the lower surface of said cover plate along the peak of the wall of circumference, and said side opening is higher than the upper surface of said brick cup along the minimum point of the wall of circumference.
7. the sliding nozzle device that prevents that vortex from producing as claimed in claim 6 is characterized in that, said side opening along the upper level difference of the minimum point of the wall of circumference and said brick cup less than 10mm.
8. the sliding nozzle device that prevents that vortex from producing as claimed in claim 1 is characterized in that each said endoporus size shape is identical.
9. the sliding nozzle device that prevents that vortex from producing as claimed in claim 1 is characterized in that, said filling pipe end is the square of cylinder or band chamfering.
10. the sliding nozzle device that prevents that vortex from producing as claimed in claim 1 is characterized in that said mesopore is shaped as the square bodily form cylindrical or that have chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013684XA CN102554207A (en) | 2012-01-17 | 2012-01-17 | Sliding water gap device capable of preventing vortex |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013684XA CN102554207A (en) | 2012-01-17 | 2012-01-17 | Sliding water gap device capable of preventing vortex |
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| CN102554207A true CN102554207A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210013684XA Pending CN102554207A (en) | 2012-01-17 | 2012-01-17 | Sliding water gap device capable of preventing vortex |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107175326A (en) * | 2017-06-28 | 2017-09-19 | 秦皇岛首秦金属材料有限公司 | A kind of steel ladle slide board structure |
| CN107398533A (en) * | 2017-08-03 | 2017-11-28 | 佳木斯大学 | A kind of aspect compares Slot Gating System |
| CN108393479A (en) * | 2018-04-18 | 2018-08-14 | 宜兴市龙宸炉料有限公司 | Tundish nozzle pocket brick capable of prolonging service life of upper nozzle |
| CN111136255A (en) * | 2020-01-20 | 2020-05-12 | 武汉科技大学 | Flow control structure for inhibiting tundish slag from being discharged |
| CN111266564A (en) * | 2020-03-12 | 2020-06-12 | 安徽工业大学 | Device for limiting generation of steel ladle vortex and application thereof |
| CN112108642A (en) * | 2020-09-29 | 2020-12-22 | 重庆大学 | Steel ladle and method for preventing slag entrapment of molten steel |
| CN114096361A (en) * | 2019-03-04 | 2022-02-25 | 庆北大学校产学协力团 | Device for preventing floating objects from mixing into free surface of steel ladle and tundish in continuous casting process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107175326A (en) * | 2017-06-28 | 2017-09-19 | 秦皇岛首秦金属材料有限公司 | A kind of steel ladle slide board structure |
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| CN108393479A (en) * | 2018-04-18 | 2018-08-14 | 宜兴市龙宸炉料有限公司 | Tundish nozzle pocket brick capable of prolonging service life of upper nozzle |
| CN114096361A (en) * | 2019-03-04 | 2022-02-25 | 庆北大学校产学协力团 | Device for preventing floating objects from mixing into free surface of steel ladle and tundish in continuous casting process |
| CN111136255A (en) * | 2020-01-20 | 2020-05-12 | 武汉科技大学 | Flow control structure for inhibiting tundish slag from being discharged |
| CN111136255B (en) * | 2020-01-20 | 2022-01-04 | 武汉科技大学 | Flow control structure for inhibiting tundish slag from being discharged |
| CN111266564A (en) * | 2020-03-12 | 2020-06-12 | 安徽工业大学 | Device for limiting generation of steel ladle vortex and application thereof |
| CN111266564B (en) * | 2020-03-12 | 2022-04-05 | 安徽工业大学 | Vortex blocking device for limiting generation of ladle vortex and application thereof |
| CN112108642A (en) * | 2020-09-29 | 2020-12-22 | 重庆大学 | Steel ladle and method for preventing slag entrapment of molten steel |
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Application publication date: 20120711 |