CN101704072B - Parallel plate type flow stabilizing and distributing device for continuously casting thin strip - Google Patents
Parallel plate type flow stabilizing and distributing device for continuously casting thin strip Download PDFInfo
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- CN101704072B CN101704072B CN200910198243XA CN200910198243A CN101704072B CN 101704072 B CN101704072 B CN 101704072B CN 200910198243X A CN200910198243X A CN 200910198243XA CN 200910198243 A CN200910198243 A CN 200910198243A CN 101704072 B CN101704072 B CN 101704072B
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Abstract
The invention relates to a parallel plate type flow stabilizing and distributing device for continuously casting a thin strip, comprising a flow distributing device arranged above a rotation roller and a casting nozzle extending into the cavity of the flow distributing device. The flow distributing device is in an inverse convex cavity structure, the upper part of the flow distributing device is provided with an open rectangular cavity, the lower part is provided with a long and narrow rectangular cavity, and a horizontal shrinkage surface is arranged between the upper cavity and the lower cavity; two side walls of the narrow and long rectangular cavity at the lower part are provided with parallel plates on which a plurality of small holes are distributed, and small holes are also distributed on the other two end walls and corners; a convex plate or a concave plate is arranged on the horizontal shrinkage surface to cover the long and narrow rectangular cavity, and small holes are arranged on the convex plate or the concave plate. The bottom of the flow distributing device is long and narrow, which is beneficial to casting in a narrow molten pool for the continuous casting of the thin strip and ensures that molten steel is uniformly distributed along the roll shaft direction.
Description
Technical field
The present invention relates to a kind of thin strap continuous casting and use flow-stabilizing flow distribution device, belong to thin strap continuous casting technology field.
Background technology
The thin strap continuous casting flow distribution device is in important status in whole strip production, the quality of its cloth fluidity ability has a strong impact on strip base final mass, and therefore, various countries have launched a lot of researchs in this regard; Like United States Patent (USP) US6 is arranged, 073,680, US5,587; 514, US6,125,917 and US6,012; Disclosed distributors such as 508, it is positioned at the below of tundish, shape such as little tundish.The molten steel that is flowed into by tundish flow in the current distribution device through the discharge orifice of arranging in this distributor.The hanging device that the described current distribution device form of Chinese patent ZL01276402.7 and ZL02283420.6 is an integral body, the cloth discharge orifice through both sides and two ends reaches the purpose of cloth stream.
The problem that traditional in the past distributor or current distribution device exist mainly is in the Molten Steel Flow course of conveying, not press down stream or reduce its turbulent flow and the interior arrangement of stream strand impact force action; Because cause Molten Steel Flow unstable; And then cause in the molten bath liquid fluctuating aggravation; The molten bath internal temperature is uneven, influences normal running and strip quality.
Summary of the invention
The object of the present invention is to provide an a kind of thin strap continuous casting that improves Molten Steel Flow stationarity, no turbulent flow and do not have stream burst impulsive force influence use parallel plate type flow stabilizing and distributing device, make Molten Steel Flow even, uniformity of temperature profile, thus improve the casting quality that approaches steel band; Can use simultaneously the comparatively simple mouth of a river or traditional continous casting sprue, simplify the structure of cloth streaming system, reduce production costs.
The present invention mainly is made up of current distribution device, sprue gate, boss or concave station: current distribution device can be seen as the two sections form for falling " protruding " type structure, and its top is a uncovered rectangular cavities; The upper chamber contraction section is done fillet and is handled; Be punctured into a narrow and long rectangular cavity (bottom) at the certain altitude place, this narrow and long rectangular cavity top can all be shunk along its length or the part contraction (is seen Fig. 2, Fig. 5) formed horizontal contraction front; This cavity bottom back cover, but have some circular holes or long and narrow hole.Have a plurality of circular holes or rectangular opening or trapezoidal hole at long and narrow pars infrasegmentalis both sides, corner and two ends certain position; This device longitudinal length is according to concrete technology adjustment.Be provided with boss or concave station in horizontal contraction front; For boss, requiring has certain altitude, has some circular holes or long and narrow hole on boss top, has some circular holes or long and narrow hole in the boss both sides; For concave station, it is certain distance below horizontal contraction front, has some circular holes or long and narrow hole above that.The effect of this boss or concave station is to slow down beam and impacts, and is that molten steel evenly gets into the current distribution device bottom.Sprue gate can be the straight barrel type mouth of a river, also can be the Y-shaped mouth of a river, perhaps uses common continuous casting mouth, and this mouth of a river is immersed in the molten steel; Its mouth of a river diameter less than or greater than long and narrow housing width.When cast, molten steel gets into bigger space, current distribution device top by the mouth of a river, because mouth of a river submergence; Reduced the beam impact; Because upper space is bigger, can strengthen the even mixing of molten steel simultaneously, molten steel is through the perforate of contraction section boss or concave station thereafter; Evenly inject the current distribution device narrow section, the contraction further expansion of narrow section can slow down the impact at the mouth of a river, top.Molten steel can enter in the molten bath through the circular hole or the long and narrow hole of narrow section both sides, two ends and bottom at last, because the current distribution device bottom is long and narrow, helps in the narrow molten bath of thin strap continuous casting, pouring into a mould, and can guarantee to go up along its length the even distribution of molten steel again.
According to the foregoing invention design, the present invention adopts following technical proposals:
A kind of thin strap continuous casting is used parallel plate type flow stabilizing and distributing device, comprises the current distribution device that is arranged at the transfer roller top and stretches into the sprue gate in the current distribution device chamber, it is characterized in that said current distribution device is for falling " protruding " cavity structure; Its top is uncovered rectangular cavities; The bottom is the narrow and long rectangular cavity, and a horizontal contraction front is arranged between the cavity up and down, and bottom narrow and long rectangular cavity becomes parallel-plate along the two side of roll shaft face; Boulez a plurality of apertures on it, in addition end walls and corner also Boulez aperture.
Aperture on the narrow and long rectangular cavity two side, above-mentioned bottom is circular hole or rectangular opening or trapezoidal hole.
Between above-mentioned current distribution device top rectangular cavities and the said horizontal contraction front with round-corner transition; The bottom of said bottom narrow and long rectangular cavity is a back cover, and it is circular hole or long and narrow hole that the aperture that is uniformly distributed with, said aperture are arranged on this back cover.
Have a boss to be positioned at bottom narrow and long rectangular body top on the above-mentioned horizontal contraction front and it covered, this above boss or/and have be uniformly distributed with single on the two sides or arrange aperture more, this aperture is circular hole or long and narrow hole.
Have a concave station capping lower cavity in the bottom narrow and long rectangular cavity under the above-mentioned horizontal contraction front, have be uniformly distributed with single on this concave station or arrange aperture more, this aperture is circular hole or long and narrow hole.
The two ends foundry goods increases shape to above-mentioned bottom narrow and long rectangular cavity being along the roller bearing direction that interlude dwindles.
Above-mentioned bottom narrow and long rectangular cavity vertically is top and dwindles the shape that the bottom increases.
Above-mentioned sprue gate is the straight barrel type mouth of a river or the Y-shaped mouth of a river, lower end.
Above-mentioned boss or concave station and current distribution device are processed one, and current distribution device and sprue gate are processed by refractory material.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art:
(1) through the combination of current distribution device, sprue gate and boss or concave station, simplifies the cloth flow structure of thin strap continuous casting greatly, and can use the normal pouring mouth of a river, reduced production cost.
(2) adopting submersed nozzle and bigger upper space can reduce beam and impact, and guarantee that molten steel fully mixes on top, is that the cast molten steel temperature is even.
(3) contraction of current distribution device design can make things convenient for current distribution device to insert inside, molten bath; The design of boss and concave station and the design of lower part outlet; Can improve the distribution situation of molten steel in the molten bath, avoid and reduce the fluctuation of molten steel liquid level in the molten bath, and can make the molten steel temperature homogenising in the molten bath; Thereby guarantee to roll normally carrying out of casting operation, help improving the quality of band steel.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention
(do not shrink (b) long and narrow cavity top mid portion and shrink (c) long and narrow cavity top and shrink fully among the figure by (a) long and narrow cavity top for the vertical view of the current distribution device of Fig. 1 for Fig. 2.)
Fig. 3 be Fig. 1 example current distribution device and sprue gate structural representation (among the figure (a) figure be mouth of a river diameter greater than slit, does not shrink on slit top, figure (b) be mouth of a river diameter greater than slit, the contraction of slit top.)
Fig. 4 is Fig. 1 example current distribution device lower part outlet sketch map
Fig. 5 is that ((a) figure is the straight barrel type mouth of a river to sprue gate structural representation in Fig. 1 example among the figure, and (b) figure is the Y-shaped mouth of a river, lower end.)
Fig. 6 is the structural representation of another embodiment of the present invention
Fig. 7 is that ((a) figure is that does not shrink on long and narrow cavity top among the figure, and (b) figure is that long and narrow cavity top mid portion shrinks, and (c) figure is that shrink fully on long and narrow cavity top for the vertical view of the current distribution device of Fig. 6 example.)
Fig. 8 be Fig. 6 example current distribution device and sprue gate structural representation (among the figure (a) figure be mouth of a river diameter greater than slit, does not shrink on slit top, figure (6) be mouth of a river diameter greater than slit, the contraction of slit top.)
The specific embodiment
The preferred embodiments of the present invention accompanying drawings is following:
Embodiment one:
Referring to Fig. 1 and Fig. 6, this thin strap continuous casting is used parallel plate type flow stabilizing and distributing device, comprises the current distribution device that is arranged at the transfer roller top and stretches into the sprue gate in the current distribution device chamber; It is characterized in that said current distribution device for falling " protruding " cavity structure, its top is uncovered rectangular cavities, and the bottom is the narrow and long rectangular cavity; A horizontal contraction front is arranged between the cavity up and down; Bottom narrow and long rectangular cavity becomes parallel-plate along the two side of roll shaft face, Boulez a plurality of apertures it on, and other end walls and corner also Boulez aperture.
Embodiment two:
Referring to Fig. 1, Fig. 2 and Fig. 3, present embodiment and the foregoing description are basic identical, and special feature is: the aperture 4 on the narrow and long rectangular cavity two side, said bottom is circular hole or rectangular opening or trapezoidal hole.Between said current distribution device 1 top rectangular cavities and the said horizontal contraction front with round-corner transition; The bottom of said bottom narrow and long rectangular cavity is a back cover, and the aperture 4d that is uniformly distributed with is arranged on this back cover, and said aperture 4d is circular hole or long and narrow hole.Have a boss 5 to be positioned at bottom narrow and long rectangular body top on the said horizontal contraction front and it covered, this above boss 5 or/and have be uniformly distributed with single on the two sides or arrange aperture 7 more, this aperture 7 is circular hole or long and narrow hole.The two ends foundry goods increases shape to said bottom narrow and long rectangular cavity being along the roller bearing direction that interlude dwindles.Said bottom narrow and long rectangular cavity vertically is top and dwindles the shape that the bottom increases.Referring to Fig. 4 and Fig. 5, said sprue gate 2 is straight barrel type mouth of a river 2a or the Y-shaped mouth of a river, lower end 2b.Said boss 5 is processed one with current distribution device 1, and current distribution device 1 and sprue gate 2 are processed by refractory material.
Embodiment three:
Referring to Fig. 6, Fig. 7 and Fig. 8; Present embodiment is identical with embodiment two basically; Institute's difference is: do not have boss 5; But have concave station 6 cappings lower cavity in the bottom narrow and long rectangular cavity under the said horizontal contraction front, and having be uniformly distributed with single on this concave station 6 or arrange aperture 8 more, this aperture 8 is circular hole or long and narrow hole.
Claims (10)
1. a thin strap continuous casting is used parallel plate type flow stabilizing and distributing device; Comprise the current distribution device (1) that is arranged at transfer roller (9) top and stretch into the sprue gate (2) in current distribution device (1) chamber; It is characterized in that said current distribution device (1) for falling " protruding " cavity structure, its top is uncovered rectangular cavities, and the bottom is the narrow and long rectangular cavity; A horizontal contraction front is arranged between the cavity up and down; Bottom narrow and long rectangular cavity becomes parallel-plate along the two side of roll shaft face, Boulez a plurality of apertures (4) it on, and other end walls and corner also Boulez aperture (4).
2. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that the aperture (4) on the narrow and long rectangular cavity two side, said bottom is circular hole or rectangular opening or trapezoidal hole.
3. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that between said current distribution device (1) top rectangular cavities and the said horizontal contraction front with round-corner transition; The bottom of said bottom narrow and long rectangular cavity is a back cover, and the aperture (4d) that is uniformly distributed with is arranged on this back cover, and said aperture (4d) is circular hole or long and narrow hole.
4. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device; It is characterized in that having on the said horizontal contraction front boss (5) to be positioned at above the narrow and long rectangular body of bottom and with it covers; Or/and have be uniformly distributed with single on the two sides or arrange aperture (7) more, this aperture (7) is circular hole or long and narrow hole on this boss (5).
5. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device; It is characterized in that having in the bottom narrow and long rectangular cavity under the said horizontal contraction front concave station (6) capping lower cavity; Have be uniformly distributed with single on this concave station (6) or arrange aperture (8) more, this aperture (8) is circular hole or long and narrow hole.
6. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that said bottom narrow and long rectangular cavity is being along the roller bearing direction that interlude dwindles and two ends increase shape gradually.
7. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that said bottom narrow and long rectangular cavity vertically is top and dwindles the shape that the bottom increases.
8. thin strap continuous casting according to claim 1 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that said sprue gate (2) is the straight barrel type mouth of a river (2a) or the Y-shaped mouth of a river, lower end (2b).
9. thin strap continuous casting according to claim 4 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that described boss (5) and current distribution device (1) process one, and said current distribution device (1) and sprue gate (2) are processed by refractory material.
10. thin strap continuous casting according to claim 5 is used the parallel-plate flow-stabilizing flow distribution device, it is characterized in that described concave station (6) and current distribution device (1) process one, and said current distribution device (1) and sprue gate (2) are processed by refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910198243XA CN101704072B (en) | 2009-11-03 | 2009-11-03 | Parallel plate type flow stabilizing and distributing device for continuously casting thin strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910198243XA CN101704072B (en) | 2009-11-03 | 2009-11-03 | Parallel plate type flow stabilizing and distributing device for continuously casting thin strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101704072A CN101704072A (en) | 2010-05-12 |
| CN101704072B true CN101704072B (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910198243XA Expired - Fee Related CN101704072B (en) | 2009-11-03 | 2009-11-03 | Parallel plate type flow stabilizing and distributing device for continuously casting thin strip |
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| CN101704072A (en) | 2010-05-12 |
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