CN216912032U - Double-roller thin-strip continuous casting nozzle device - Google Patents
Double-roller thin-strip continuous casting nozzle device Download PDFInfo
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- CN216912032U CN216912032U CN202121839159.4U CN202121839159U CN216912032U CN 216912032 U CN216912032 U CN 216912032U CN 202121839159 U CN202121839159 U CN 202121839159U CN 216912032 U CN216912032 U CN 216912032U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a double-roller thin-strip continuous casting nozzle device which comprises two nozzle bodies, a first flow equalizing hole, a second flow equalizing hole and a third flow equalizing hole, wherein the two nozzle bodies are provided with inner cavities, the axes of the two nozzle bodies are positioned on the same straight line, and the first ends of the two nozzle bodies are arranged close to each other; a plurality of first flow equalizing holes communicated with the inner cavity are formed in the side walls of the two water gap bodies close to the bottoms of the two water gap bodies; the second flow equalizing hole is formed in the first end of the water gap body and communicated with the inner cavity of the water gap body; the third flow equalizing hole is arranged at the first end of the other water gap body and is communicated with the inner cavity of the water gap body; the second flow equalizing hole and the third flow equalizing hole are respectively positioned on two sides of a vertical surface where the axes of the two water gap bodies are positioned. The utility model can cause the flow field in the melting bath of the double-roller crystallizer to form benign disturbance so as to ensure that the molten steel is uniformly distributed in the melting bath of the double-roller crystallizer.
Description
Technical Field
The utility model belongs to the technical field of thin strip continuous casting, and particularly relates to a double-roller thin strip continuous casting nozzle device.
Background
The technology is characterized in that molten steel is directly poured between a pair of crystallization rollers which rotate in opposite directions and are cooled by water flowing inside, so that the molten steel is solidified between the two rollers to form a thin strip.
Compared with the traditional continuous casting process, the twin-roll strip casting and rolling process has the advantages of short flow, low production cost, energy conservation, environmental protection and the like, and the strip does not need to be subjected to reheating treatment.
In the prior art, the molten steel can be directly cast and rolled into strip steel with the thickness of 0.7-5mm in the strip continuous casting process, the production flow of hot rolled strip steel is greatly shortened, and the method is the hot rolled strip steel production technology with the shortest flow at present. The strip casting technique is a technique of directly casting a thin strip from liquid molten steel. The strip casting process is often referred to as strip casting, meaning that the process is a combination of continuous casting and rolling. The strip casting process is a sub-rapid solidification process of metal, and in the process, molten steel is uniformly distributed into a long and narrow double-roller molten pool, which becomes another key technical point of the technology.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a double-roller thin strip continuous casting nozzle device, which is used for uniformly distributing molten steel in a molten pool of a double-roller crystallizer.
The utility model aims to solve the problems by the following technical scheme:
a twin roll strip casting nozzle device comprising:
the two water gap bodies are provided with inner cavities, the axes of the two water gap bodies are positioned on the same straight line, and the first ends of the two water gap bodies are arranged close to each other;
the side walls of the two water gap bodies close to the bottom are respectively provided with a plurality of first flow equalizing holes communicated with the inner cavity;
the second flow equalizing hole is formed in the first end of the water gap body and communicated with the inner cavity of the water gap body;
the third flow equalizing hole is formed in the first end of the other water gap body and communicated with the inner cavity of the water gap body;
the second flow equalizing hole and the third flow equalizing hole are respectively positioned on two sides of a vertical surface where the axes of the two water gap bodies are positioned.
Further, an included angle between the second flow equalizing hole and a vertical surface where the axis of the water gap body is located is 0-55 degrees; and the included angle between the third flow equalizing hole and the vertical surface where the axis of the water gap body is located is 0-55 degrees.
Further, the included angle between the second flow equalizing hole and the vertical surface where the axis of the nozzle body is located is the same as the included angle between the third flow equalizing hole and the vertical surface where the axis of the nozzle body is located.
Furthermore, the second flow equalizing hole and the third flow equalizing hole are both arranged in a horizontal and upward inclined mode, and included angles between the second flow equalizing hole and the horizontal plane and included angles between the third flow equalizing hole and the horizontal plane are both 10-60 degrees.
Further, an included angle between the second flow equalizing hole and the horizontal plane is the same as an included angle between the third flow equalizing hole and the horizontal plane, the height of the lowest point of the second flow equalizing hole is the same as the height of the lowest point of the third flow equalizing hole, and the height of the highest point of the second flow equalizing hole is the same as the height of the highest point of the third flow equalizing hole.
Further, the plurality of first flow equalizing holes comprises:
the two first holes are respectively arranged close to two ends of the nozzle body, the included angle between the first holes and the vertical plane where the axis of the nozzle body is located is 10-60 degrees, the lowest point of each first hole is arranged on the inner wall of the nozzle body, the highest point of each first hole is arranged on the outer wall of the nozzle body, and the distance between the lowest point of each first hole and one end, close to the nozzle body, of each first hole is larger than the distance between the highest point of each first hole and one end, close to the nozzle body, of each first hole;
two second holes respectively arranged close to the two first holes, wherein the aperture of each second hole is at least 1 time of that of each first hole;
and the two third holes are positioned between the two second holes, and the aperture of each third hole is 1-1.5 times that of the first hole.
Further, the second hole is horizontally arranged in an upward inclined mode, the included angle between the second hole and the vertical plane where the axis of the nozzle body is located is 55-80 degrees, the lowest point of the second hole is arranged on the inner wall of the nozzle body, and the highest point of the second hole is arranged on the outer wall of the nozzle body.
Furthermore, the third hole is horizontally arranged in an upward inclined mode, an included angle between the third hole and a vertical surface where the axis of the water gap body is located is 55-80 degrees, the lowest point of the third hole is arranged on the inner wall of the water gap body, and the highest point of the third hole is arranged on the outer wall of the water gap body.
Furthermore, the second end of two mouth of a river bodies all is equipped with the fourth flow equalizing hole that the level leaned up and set up, the fourth flow equalizing hole with along the contained angle between the length direction line of inner chamber is 30 ~ 90.
And further, the method comprises the step of establishing a flange on the nozzle body, wherein a positioning pin hole is formed in the flange, and the flange is used for fixing the nozzle body, so that the first flow equalizing hole, the second flow equalizing hole and the third flow equalizing hole are all positioned in a molten pool of the double-roller crystallizer.
The utility model provides a double-roller thin strip continuous casting nozzle device, which is characterized in that nozzle bodies are paired for use, a first flow equalizing hole is formed in the first end of one nozzle body, a second flow equalizing hole is formed in the first end of the other nozzle body, and the second flow equalizing hole and the third flow equalizing hole are respectively positioned on two sides of a vertical surface where the axes of the two nozzle bodies are positioned, so that the flowing activity of molten steel in a region between the two nozzle bodies can be increased, and a flow field in a molten pool of a double-roller crystallizer forms benign disturbance, so that the molten steel is uniformly distributed in the molten pool of the double-roller crystallizer.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic view illustrating a twin roll strip casting nozzle device in relation to a twin roll continuous casting mold according to an exemplary embodiment of the present invention;
fig. 2 is a schematic structural view of a twin roll strip casting nozzle assembly according to an exemplary embodiment of the present invention;
fig. 3 is a front view of a twin roll strip casting nozzle device according to an exemplary embodiment of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3 in accordance with an exemplary embodiment of the present invention;
fig. 5 is a side view of an exemplary embodiment of the present invention.
In the figure:
1-a nozzle body, 101-a rectangular cavity and 102-an inverted wedge-shaped cavity;
2-first flow equalization orifice, 201-first orifice, 202-second orifice, 203-third orifice;
3-a second flow equalizing hole;
4-a third flow equalizing hole;
5-a molten pool;
6-a fourth flow equalizing hole;
7-flanges.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
The utility model provides a double-roller thin-strip continuous casting nozzle device, which comprises two nozzle bodies 1, a first flow equalizing hole 2, a second flow equalizing hole 3 and a third flow equalizing hole 4, wherein the two nozzle bodies 1 are provided with inner cavities, the axes of the two nozzle bodies 1 are positioned on the same straight line, and the first ends of the two nozzle bodies 1 are arranged close to each other; the side walls of the two water gap bodies 1 close to the bottom are respectively provided with a plurality of first flow equalizing holes 2 communicated with the inner cavity; the second flow equalizing hole 3 is arranged at the first end of a nozzle body 1 and is communicated with the inner cavity of the nozzle body 1; the third flow equalizing hole 4 is formed in the first end of the other water gap body 1 and communicated with the inner cavity of the water gap body 1; wherein, the second flow equalizing hole 3 and the third flow equalizing hole 4 are respectively positioned at two sides of a vertical surface where the axes of the two nozzle bodies 1 are positioned.
According to the utility model, the nozzle bodies 1 are used in an assembly mode, the first end of one nozzle body 1 is provided with the first flow equalizing hole 2, the first end of the other nozzle body 1 is provided with the second flow equalizing hole 3, and the second flow equalizing hole 3 and the third flow equalizing hole 4 are respectively positioned on two sides of a vertical plane where the axes of the two nozzle bodies 1 are positioned, so that the flowing activity of molten steel in the area between the two nozzle bodies 1 can be increased, and further, a flow field in a molten pool 5 of a double-roller crystallizer forms benign disturbance, so that the molten steel is uniformly distributed in the molten pool 5 of the double-roller crystallizer.
As a preferred embodiment, the inner cavity comprises a rectangular cavity 101 communicated with the top of the nozzle body 1 and an inverted wedge cavity 102 communicated with the rectangular cavity 101, and the first flow equalizing hole 2, the second flow equalizing hole 3 and the third flow equalizing hole 4 are communicated with the inverted wedge cavity 102. The inner cavity of the nozzle body 1 is of an integral cavity structure, the upper part of the inner cavity is a rectangular cavity 101, the lower part of the inner cavity is a reverse wedge-shaped cavity 102, a first flow equalizing hole 2 is formed in the reverse wedge-shaped cavity 102 along the length direction of the nozzle, and a second flow equalizing hole 3 or a third flow equalizing hole 4 is formed in the first end of the reverse wedge-shaped cavity, so that when molten steel in the nozzle body 1 is injected into a molten pool 5 from the flow equalizing holes, the liquid level and the temperature field of the molten pool 5 are kept stable.
In some embodiments, referring to fig. 3, the angle between the second flow equalizing hole 3 and the vertical plane of the axis of the nozzle body 1 is 0 ° to 55 °; the included angle between the third flow equalizing hole 4 and the vertical plane where the axis of the nozzle body 1 is located is 0-55 degrees. In the embodiment, the second flow equalizing hole 3 and the third flow equalizing hole 4 are respectively arranged on two sides of the vertical surface where the axes of the two nozzle bodies 1 are located in a staggered mode, the distance between one end, arranged on the inner cavity wall, of the second flow equalizing hole 3 and the vertical surface where the axes are located is smaller than the distance between one end, arranged on the inner cavity outer wall, of the second flow equalizing hole 3 and the vertical surface where the axes are located, and the distance between one end, arranged on the inner cavity inner wall, of the third flow equalizing hole 4 and the vertical surface where the axes are located is smaller than the distance between one end, arranged on the inner cavity outer wall, of the third flow equalizing hole 4 and the vertical surface where the axes are located, so that the second flow equalizing hole 3 and the third flow equalizing hole 4 form benign disturbance to the flow field in the molten pool 5.
In some embodiments, the angle between the second flow equalizing hole 3 and the vertical plane of the axis of the nozzle body 1 is the same as the angle between the third flow equalizing hole 4 and the vertical plane of the axis of the nozzle body 1.
In other embodiments, the second flow equalizing hole 3 and the third flow equalizing hole 4 are both arranged in a horizontal and upward inclined manner, and the included angles between the second flow equalizing hole 3 and the horizontal plane and between the third flow equalizing hole 4 and the horizontal plane are both 10-60 degrees. In this embodiment, through being the level tilt up setting with the equal discharge orifice of second 3 and the equal discharge orifice of third 4, make from the equal discharge orifice of second 3 and the equal discharge orifice of third 4 outflow molten steel layer opening parabola downwards flow into in the molten bath 5, make the liquid flow bed steady, and then guaranteed the stability of the liquid level and the temperature field of molten bath 5.
Further, the included angle between the second flow equalizing hole 3 and the horizontal plane is the same as the included angle between the third flow equalizing hole 4 and the horizontal plane, the height of the lowest point of the second flow equalizing hole 3 is the same as the height of the lowest point of the third flow equalizing hole 4, and the height of the highest point of the second flow equalizing hole 3 is the same as the height of the highest point of the third flow equalizing hole 4.
In other embodiments, referring to fig. 3, the plurality of first flow equalizing holes 2 include two first holes 201, two second holes 202, and two third holes 203, the two first holes 201 are respectively disposed near two ends of the nozzle body 1, an included angle between the first holes 201 and a vertical plane where an axis of the nozzle body 1 is located is 10 ° to 60 °, a lowest point of the first holes 201 is disposed on an inner wall of the nozzle body 1, a highest point of the first holes 201 is disposed on an outer wall of the nozzle body 1, and a distance between the lowest point of the first holes 201 and one end thereof near the nozzle body 1 is greater than a distance between the highest point of the first holes 201 and one end thereof near the nozzle body 1; the two second holes 202 are respectively arranged close to the two first holes 201, and the aperture of the second holes 202 is at least 1 time of that of the first holes 201; the two third holes 203 are located between the two second holes 202, and the aperture of the third hole 203 is 1-1.5 times of that of the first hole 201.
In some embodiments, the second hole 202 is disposed to incline upwards horizontally, the included angle between the second hole 202 and the vertical plane where the axis of the nozzle body 1 is located is 55 ° to 80 °, the lowest point of the second hole 202 is disposed on the inner wall of the nozzle body 1, and the highest point of the second hole 202 is disposed on the outer wall of the nozzle body 1.
In some embodiments, the third hole 203 is arranged to incline upwards horizontally, the included angle between the third hole 203 and the vertical plane where the axis of the nozzle body 1 is located is 55 ° to 80 °, the lowest point of the third hole 203 is arranged on the inner wall of the nozzle body 1, and the highest point of the third hole 203 is arranged on the outer wall of the nozzle body 1. In this embodiment, the molten steel is tapped at different angles through the first hole 201, the second hole 202 and the third hole 203 to supplement the molten steel on the end surface of the molten pool 5, so that the crystallizer can keep the liquid level stable in the casting process, the requirements of the thin strip steel casting technology are met, the strip steel obtains high quality with uniform tissue and relatively small thickness difference, a good use result is obtained, and the method is worthy of popularization and use.
In some embodiments, the second ends of the two nozzle bodies 1 are provided with fourth flow equalizing holes 6 which are horizontally and upwards inclined, and the included angle between the fourth flow equalizing holes 6 and the horizontal plane is 30-90 °.
In some embodiments, the nozzle further comprises a flange 7 arranged on the nozzle body 1, the flange 7 is provided with a positioning pin hole, and the flange 7 is used for fixing the nozzle body 1, so that the first equalizing hole 2, the second equalizing hole 3 and the third equalizing hole 4 are all positioned in a molten pool 5 of a double-roller crystallizer.
As a preferred embodiment, the device also comprises a liquid level detection mechanism arranged above the nozzle body 1, and the liquid level detection mechanism is used for judging the liquid level height in the molten pool 5 according to the detected liquid level width of the molten pool 5 between the double-roller crystallizer. For example, when the detected width of the liquid surface of the molten pool 5 is decreased, it is considered that the liquid level of the molten steel in the molten pool 5 is decreased, and at this time, it is necessary to supplement the molten steel like in the molten pool 5 so as to avoid that the liquid level of the molten pool 5 is lower than the height of the equalizing hole 2.
When the strip continuous casting water distribution outlet device provided by the utility model is in a working state, the water inlet body 1 is in a relative position in a figure 1; when in stable pouring, a stable molten steel level H is required in the double-roller crystallizer, and the height of the H is higher than the first flow equalizing hole 2, the second flow equalizing hole 3 and the third flow equalizing hole 4 on the nozzle body 1.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A twin roll strip casting nozzle assembly comprising:
the two water gap bodies (1) are provided with inner cavities, the axes of the two water gap bodies (1) are positioned on the same straight line, and the first ends of the two water gap bodies (1) are arranged close to each other;
the side walls of the two water gap bodies (1) close to the bottom are respectively provided with a plurality of first flow equalizing holes (2) communicated with the inner cavity;
the second flow equalizing hole (3) is formed in the first end of the water gap body (1) and communicated with the inner cavity of the water gap body (1);
the third flow equalizing hole (4) is formed in the first end of the other water gap body (1) and communicated with the inner cavity of the water gap body (1);
the second flow equalizing hole (3) and the third flow equalizing hole (4) are respectively located on two sides of a vertical surface where the axes of the two nozzle bodies (1) are located.
2. The twin roll strip casting nozzle device according to claim 1, characterized in that the angle between the second flow equalizing hole (3) and the vertical plane on which the axis of the nozzle body (1) is located is 0 ° to 55 °; and the included angle between the third flow equalizing hole (4) and the vertical surface where the axis of the water gap body (1) is located is 0-55 degrees.
3. The twin roll strip casting nozzle arrangement according to claim 2, characterized in that the angle between the second flow equalizing bore (3) and the vertical plane of the nozzle body (1) axis is the same as the angle between the third flow equalizing bore (4) and the vertical plane of the nozzle body (1) axis.
4. The twin roll strip casting nozzle apparatus as claimed in claim 2, wherein the second flow equalizing hole (3) and the third flow equalizing hole (4) are both horizontally and upwardly inclined, and the included angles between the second flow equalizing hole (3) and the third flow equalizing hole (4) and the horizontal plane are both 10 ° to 60 °.
5. The twin roll strip casting nozzle device according to claim 4, characterized in that the angle between the second flow equalizing hole (3) and the horizontal plane is the same as the angle between the third flow equalizing hole (4) and the horizontal plane, the height of the lowest point of the second flow equalizing hole (3) is the same as the height of the lowest point of the third flow equalizing hole (4), and the height of the highest point of the second flow equalizing hole (3) is the same as the height of the highest point of the third flow equalizing hole (4).
6. The twin roll strip casting nozzle device according to claim 1, wherein the plurality of first flow equalizing holes (2) includes:
the two first holes (201) are respectively arranged close to two ends of the nozzle body (1), the included angle between the first holes (201) and the vertical plane where the axis of the nozzle body (1) is located is 10-60 degrees, the lowest point of each first hole (201) is arranged on the inner wall of the nozzle body (1), the highest point of each first hole (201) is arranged on the outer wall of the nozzle body (1), and the distance between the lowest point of each first hole (201) and one end of each first hole close to the nozzle body (1) is larger than the distance between the highest point of each first hole (201) and one end of each first hole close to the nozzle body (1);
two second holes (202) respectively arranged close to the two first holes (201), wherein the aperture of the second holes (202) is at least 1 time of that of the first holes (201);
two third holes (203) located between the two second holes (202), the diameter of the third holes (203) being 1-1.5 times the diameter of the first holes (201).
7. The twin roll strip casting nozzle assembly according to claim 6, characterized in that the second hole (202) is horizontally and upwardly inclined, the angle between the second hole (202) and the vertical plane of the axis of the nozzle body (1) is 55-80 °, the lowest point of the second hole (202) is provided on the inner wall of the nozzle body (1), and the highest point of the second hole (202) is provided on the outer wall of the nozzle body (1).
8. The twin roll strip casting nozzle device according to claim 6, characterized in that the third hole (203) is horizontally and upwardly inclined, the angle between the third hole (203) and the vertical plane of the axis of the nozzle body (1) is 55-80 °, the lowest point of the third hole (203) is arranged on the inner wall of the nozzle body (1), and the highest point of the third hole (203) is arranged on the outer wall of the nozzle body (1).
9. The twin roll strip casting nozzle assembly according to claim 6, wherein the second ends of the two nozzle bodies (1) are provided with fourth flow equalizing holes (6) which are horizontally and upwardly inclined, and the included angle between the fourth flow equalizing holes (6) and the line along the length direction of the inner cavity is 30-90 °.
10. The twin roll strip casting nozzle assembly according to any one of claims 1 to 9, further comprising a flange (7) provided on the nozzle body (1), the flange (7) being provided with a dowel hole, the flange (7) being used to fix the nozzle body (1) such that the first (2), second (3) and third (4) flow equalizing holes are located in a molten bath (5) of a twin roll mold.
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| CN202121839159.4U CN216912032U (en) | 2021-08-06 | 2021-08-06 | Double-roller thin-strip continuous casting nozzle device |
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| CN202121839159.4U CN216912032U (en) | 2021-08-06 | 2021-08-06 | Double-roller thin-strip continuous casting nozzle device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113649535A (en) * | 2021-08-06 | 2021-11-16 | 东北大学 | Double-roller thin-strip continuous casting nozzle device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113649535A (en) * | 2021-08-06 | 2021-11-16 | 东北大学 | Double-roller thin-strip continuous casting nozzle device |
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