CN204035548U - Square parison casting submersed nozzle and arrangement thereof - Google Patents
Square parison casting submersed nozzle and arrangement thereof Download PDFInfo
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- CN204035548U CN204035548U CN201420407688.0U CN201420407688U CN204035548U CN 204035548 U CN204035548 U CN 204035548U CN 201420407688 U CN201420407688 U CN 201420407688U CN 204035548 U CN204035548 U CN 204035548U
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Abstract
The utility model discloses a kind of square parison casting submersed nozzle and arrangement thereof, submersed nozzle comprises: in ring body shape, be formed with the sidewall of hollow cavity, the upper surface of described sidewall is formed with the first rounded opening, the lower surface of described sidewall is formed in criss-cross second opening, the center of circle of described first opening and the center of described second opening are all positioned on the axis of described sidewall, the area of described first opening and the area equation of described second opening; The edge that described hollow cavity extends to described second opening by the edge of described first opening along the direction correspondence of accurate bus is formed through.The utility model can form the flow field of stable and uniform by such scheme in crystallizer, improve thermal center (-tre) and the crystallizer section of molten steel, especially the temperature of horizontal direction and homogeneity of ingredients, be beneficial to the floating removal of non-metallic inclusions in molten steel and the growth of initial solidification shell, improve continuous casting billet structure and surface quality.
Description
Technical field
The utility model relates to metallurgical technology field, belongs to steel billet casting cycle, particularly a kind of square parison casting submersed nozzle and arrangement thereof.
Background technology
Continuous casting steel machine is the technology of steel billet by continuous for molten steel condensation.Molten steel in tundish continuously injects crystallizer by the submersed nozzle prepared by refractory material, forms strand after cooling.Molten steel and air exclusion can come by submersed nozzle, and the secondary oxidation of control molten steel in casting cycle, improves Molten Steel Cleanliness; The mouth of a river reasonable in design and the arrangement at the mouth of a river, can be stablized, uniform crystallizer flow field, to guarantee the normal growth of initial solidification shell, and impel inclusion content in melting steel to float rapidly, realize continuous, the low-cost production of high-quality steel.
Square parison crystallizer internal cavity section is square type, obtain better crystallizer flow field, just for square parison crystallizer feature, must redesign submersed nozzle and arrangement.
In prior art, submersed nozzle and the casting mode of square parison mainly contain two kinds:
One is that semi-open-type casting is carried out at the through-type semi-submersible mouth of a river of employing one, and lower end, the mouth of a river is inserted in crystallizer, and upper end, the mouth of a river is infundibulate, has certain distance with tundish bottom surface.This mode can reduce the impact of beam, but can not realize the full guard casting of molten steel, causes part molten steel oxidized, reduces Molten Steel Cleanliness.
Two is done improvement on this basis, and upper end, the mouth of a river is connected with tundish bottom, still adopts a through-type soaking water gap to cast, and can realize full guard casting.But in the through-type mouth of a river, molten steel impact depth is comparatively large, and molten steel thermal center (-tre) moves down, be unfavorable for the floating of field trash and initial solidification shell growth.Meanwhile, the molten steel that the through-type mouth of a river is flowed out is comparatively concentrated, makes whole square parison transverse temperature, component difference comparatively large, easily causes the mass defect such as crackle and segregation.
Known for these reasons, under prior art, square parison crystallizer submersed nozzle and arrangement thereof are difficult to meet the requirement of low cost in square parison production process and steady production.
Summary of the invention
In order to solve the problem, the utility model embodiment provides a kind of square parison casting submersed nozzle on the one hand, it comprises: in ring body shape, be formed with the sidewall of hollow cavity, the upper surface of described sidewall is formed with the first rounded opening, the lower surface of described sidewall is formed in criss-cross second opening, and the center of circle of described first opening and the center of described second opening are all positioned on the axis of described sidewall, the area of described first opening and the area equation of described second opening; The edge that described hollow cavity extends to described second opening by the edge of described first opening along the direction correspondence of accurate bus is formed through; Wherein, described accurate bus be on described first edge of opening a bit and the line of any on described second edge of opening, a bit being formed by fiducial axis line cross section is crossing with described first edge of opening on described first edge of opening, a bit being formed by described fiducial axis line cross section is crossing with described second edge of opening on described second edge of opening, described fiducial axis line cross section is for limit and perpendicular to the plane of described upper surface and described lower surface with the axis of described submersed nozzle.
In submersed nozzle as above, preferably, the edge of described second opening comprises: left hand edge, top edge, right hand edge and lower limb, described left hand edge, described top edge, described right hand edge and described lower limb are connected to surround the second opening successively, described left hand edge and described right hand edge are about the Y direction symmetry in the plane at place, described lower surface, described top edge and described lower limb are symmetrical about the X-direction in the plane at place, described lower surface, and X-direction is mutually vertical with Y direction and all by the center of described second opening.
In submersed nozzle as above, preferably, described left hand edge comprises upper left section, lower-left section and the first central segment between described upper left section and described lower-left section, one end of described upper left section, one end of described first central segment are connected successively with other end one end with described lower-left section, and described first central segment is vertical line segment; Top edge comprises upper left section, upper right section and the second central segment between described upper left section and described upper right section, one end of described upper left section, one end of described second central segment are connected successively with other end one end with described upper right section, the other end of described upper left section is connected with the other end of described upper left section, and described second central segment is horizontal line section.
In submersed nozzle as above, preferably, the junction of the junction of described lower-left section and described first central segment, described first central segment and described upper left section, described upper left section and described upper left section junction, described upper left section with the equal rounding in junction of the junction of described second central segment, described second central segment and described upper right section.
In submersed nozzle as above, preferably, the 3rd opening is contained in the cross section of the formation crossing with described sidewall of the horizontal plane perpendicular to described sidewall axis, the edge edge and corner position rounding of described 3rd opening.
In submersed nozzle as above, preferably, the upper surface of described sidewall is annular, and the lower surface of described sidewall is cylindrical inner cross shape combination shape.
The utility model embodiment additionally provides a kind of arrangement of square parison casting submersed nozzle on the other hand, and it is as follows: in crystallizer, pour into a mould region place a submersed nozzle; The axis of described submersed nozzle overlaps with the center line pouring into a mould region in described crystallizer, and wherein, described submersed nozzle is aforementioned submersed nozzle.
In arrangement as above, preferably, the upper surface of described submersed nozzle is connected with the bottom of tundish.
In arrangement as above, preferably, after the lower surface insertion molten steel of described submersed nozzle, the subsurface distance range of top molten steel deeply to described crystallizer is 20mm ~ 80mm.
In arrangement as above, preferably, the axis of described submersed nozzle overlaps with the center line of square parison.
The beneficial effect that the technical scheme that the utility model provides is brought is:
(1), by adopting the variable cross-section mouth of a river penetrating up and down, not only can stablize the mobility of molten steel in submersed nozzle, the impact dynamics of submersed nozzle lower flow molten steel can also be disperseed, the flow field of stable and uniform is formed in crystallizer, improve the thermal center (-tre) of molten steel, also crystallizer section can be improved, especially the temperature of horizontal direction and homogeneity of ingredients, be conducive to the floating removal of non-metallic inclusions in molten steel and the growth of initial solidification shell, strand column crystal ratio and segregation can be reduced, improve continuous casting billet structure and surface quality, also Molten Steel Cleanliness can be improved, thus improve the stability of production.
(2), structure is simple, is easy to manufacture, can reduces submersed nozzle difficulty of processing.
(3), long service life, can production cost be reduced.
(4), the lower end of submersed nozzle is through hole, when changing submersed nozzle process, do not retain molten steel, can ensure the safety in production of operating personnel in submersed nozzle.
Accompanying drawing explanation
The perspective view of a kind of square parison casting submersed nozzle that Fig. 1 provides for the utility model embodiment;
Fig. 2 is along the perspective view after the A-A line cutting of Fig. 1;
The structural representation of the upper surface of a kind of square parison casting submersed nozzle that Fig. 3 provides for the utility model embodiment;
The structural representation of the lower surface of a kind of square parison casting submersed nozzle that Fig. 4 provides for the utility model embodiment;
Fig. 5 is arranged in the structural representation of the cross section in crystallizer for a kind of submersed nozzle that the utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
See Fig. 1-4, the utility model embodiment provides a kind of square parison casting submersed nozzle, and it comprises: sidewall 1, and this sidewall 1 is in ring body shape, and be formed with through hole penetrating up and down along its axis direction Z at the middle part of sidewall 1, namely the upper and lower side of sidewall 1 is all unlimited.Sidewall 1 comprises upper surface 11, lower surface 12, lateral surface 13 and medial surface 14, and upper surface 11 is formed with the first opening 110, and in other words the first opening is formed by the Plane intersects at through hole and place, upper surface 11, and the first opening is rounded; Lower surface 12 is formed with the second opening 120, in other words the second opening is formed by the Plane intersects at through hole and place, lower surface 12, second opening is cross, and the center of the second opening and the center of circle of the first opening are all on the axis direction Z of sidewall 1 (or in projecting corresponding relation on axis direction of sidewall 1); Be hollow cavity 10 in through hole, the space that namely plane at medial surface 14 and the upper and lower end face of sidewall place respectively surrounds is hollow cavity 10, and during application, hollow cavity 10 is for as the passage in the molten steel inflow crystallizer in tundish.Particularly, hollow cavity 10 by the edge of the first opening 110 a little along and the edge that extends to the second opening 120, the all-pair direction of accurate bus of answering be formed through, wherein, accurate bus some corresponding with certain on the edge of the first opening 110 refers to this certain line of any a bit and on the edge of the second opening, this certain a bit formed by fiducial axis line cross section is crossing with the first edge of opening, a bit being formed by fiducial axis line cross section is crossing with the second edge of opening on this second edge of opening, this fiducial axis line cross section is for limit and perpendicular to the plane of upper surface and lower surface with the axis of submersed nozzle (axis of sidewall), namely this certain a bit and on the second edge of opening a bit respectively by taking axis as fiducial axis line cross section and first edge of opening on limit and the second edge of opening is crossing is formed, that is certain on the first edge in corresponding relation on fiducial axis line cross section is a bit connected to form accurate bus a bit and on the second edge.See Fig. 1, for the C point on the edge of the first opening, the axis of sidewall is the center O of the second opening
1with the center of circle O of the first opening
2line, be limit with axis and the edges intersect in the fiducial axis line cross section and the second opening of crossing C point in B point, then the line between B point and C point is the accurate bus corresponding with C point.The accurate bus corresponding with other points on the edge of the first opening can be formed according to this certain a bit (such as C point) mode that corresponding accurate bus is formed on the edge of the first opening.The shape (or horizontal plane intersects the cross section of formation from medial surface) in hollow cavity 10 arbitrary cross section is in the horizontal direction different with the shape of the first opening 110, and be variable cross-section, therefore this submersed nozzle is called the submersed nozzle of variable cross-section.In order to make the molten steel flow speed stability that circulates in inner chamber even, the area of the first opening 110 and the area equation of the second opening 120.
In order to easy to operate, the lateral surface 13 of sidewall 1 is cylindrical, and namely upper surface 11 is surrounded by the first outer ring and the first opening, and in other words upper surface ringwise, and the radius of the first outer ring is greater than the radius of the first opening; The lower surface 12 of sidewall 1 is surrounded by the second outer ring and the second opening, and in other words lower surface is cylindrical inner cross shape combination shape, and the radius of the second outer ring is greater than the internal diameter of the second opening.Preferably, the center of circle of the first outer ring and the center of circle of the first opening overlap (concentric circles), the center of circle of the second outer ring and the center superposition of the second opening.
The edge of the second opening 120 comprises left hand edge 121, right hand edge 123, top edge 122 and lower limb 124, one end of left hand edge 121, one end of top edge 12 and the other end, one end of right hand edge 123 and the other end, one end of lower limb 124 and the other end, closed shape is in turn connected to form to surround the second opening with the other end of left hand edge 121, left hand edge 121 and right hand edge 123 are about the Y direction symmetry in the horizontal plane at place, lower surface, top edge 122 and lower limb 124 are about the X-direction symmetry in the horizontal plane at place, lower surface, the X-direction being positioned at lower surface is mutually vertical with Y direction and all by the center of the second opening.Now cut the sidewall comprising top edge and lower limb with any plane being parallel to the plane formed by Y direction and axis, the section configuration of the medial surface obtained is isosceles trapezoid; Cut the sidewall comprising left hand edge and right hand edge with any plane being parallel to the plane formed by X-direction and axis, the section configuration of the medial surface obtained also is isosceles trapezoid.
Due to the symmetrical configuration of left hand edge and right hand edge, the symmetrical configuration of top edge and lower limb, for left hand edge and top edge, the structure to the edge of the second opening is described below, see Fig. 4, left hand edge 121 comprises upper left section 1210, lower-left section 1211 and the first central segment 1212, one end of upper left section 1210, one end of the first central segment 1212 and one end of the other end and lower-left section 1211 are in turn connected to form recess (right openings) left, further, the first central segment 1212 is that vertical line segment is namely parallel with Y direction.Upper left section and lower-left section are preferably arcuate line segment.Top edge 122 comprises upper left section 1221, upper right section 1222 and the second central segment 1220, one end of one end of upper left section 1221, one end of the second central segment 1220 and the other end and upper right section 1222 is in turn connected to form recess (open lower side) upwards, further, the second central segment is that horizontal segment is namely parallel with X-direction.Upper left section and upper right section is preferably arcuate line segment.The equal rounding in edges and corners at the edge of the second opening.
In order to form the flow field of stable and uniform further in crystallizer, the edge edge and corner position rounding in hollow cavity 10 arbitrary cross section in the horizontal direction, in other words the edge edge and corner position rounding in the medial surface of sidewall 1 arbitrary cross section in the horizontal direction.
Because the molten steel temperature circulated in the hollow cavity of submersed nozzle is high, in order to mention the heat resistance of submersed nozzle, the material of submersed nozzle is refractory material.
The utility model additionally provides a kind of arrangement of square parison casting submersed nozzle, see Fig. 5, apply above-mentioned submersed nozzle when casting in crystallizer, an above-mentioned submersed nozzle is placed on cast region (pour point) in crystallizer, and the axis of this submersed nozzle and the interior dead in line (axle center of this submersed nozzle and the interior axis coinciding pouring into a mould region of crystallizer) of pouring into a mould region (pour point) of crystallizer.The tundish of carrying molten steel is positioned at the top of submersed nozzle, and during casting, the molten steel in tundish flows in crystallizer through submersed nozzle, and under the effect of crystallizer, form square parison 2, this crystallizer can be described as square parison crystallizer.
For making molten steel cast the degree of depth rationally, when casting, the upper surface of submersed nozzle is connected with the bottom of tundish, and after the lower surface insertion molten steel of submersed nozzle, the distance of lower surface distance molten steel liquid level is 20 ~ 80mm, is preferably 60mm.
The axis of submersed nozzle with on square parison vertical direction center line (namely in Fig. 5 square parison 2 central point and perpendicular to the normal direction of paper) overlap (the i.e. axle center O of submersed nozzle that often says of technical staff
1with the center superposition of square parison) to obtain the square parison of temperature and uniform composition.
In sum, the beneficial effect of the utility model embodiment is as follows:
(1), by adopting the variable cross-section mouth of a river penetrating up and down, not only can stablize the flow stability of molten steel in submersed nozzle, the impact dynamics of submersed nozzle lower flow molten steel can also be disperseed, the flow field of stable and uniform is formed in crystallizer, improve the thermal center (-tre) of molten steel, also crystallizer section can be improved, especially the temperature of horizontal direction and homogeneity of ingredients, be conducive to the floating removal of non-metallic inclusions in molten steel and the growth of initial solidification shell, strand column crystal ratio and segregation can be reduced, improve continuous casting billet structure and surface quality, also Molten Steel Cleanliness can be improved.
(2), structure is simple, is easy to manufacture, can reduces submersed nozzle difficulty of processing.
(3), long service life, can production cost be reduced.
(4), the lower end of submersed nozzle is through hole, when changing submersed nozzle process, do not retain molten steel, can ensure the safety in production of operating personnel in submersed nozzle.
As known by the technical knowledge, the utility model can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Allly all to be included in the utility model within the scope of the utility model or being equal to the change in scope of the present utility model.
Claims (10)
1. a square parison casting submersed nozzle, is characterized in that, described submersed nozzle comprises:
In ring body shape, be formed with the sidewall of hollow cavity, the upper surface of described sidewall is formed with the first rounded opening, the lower surface of described sidewall is formed in criss-cross second opening, the center of circle of described first opening and the center of described second opening are all positioned on the axis of described sidewall, the area of described first opening and the area equation of described second opening;
The edge that described hollow cavity extends to described second opening by the edge of described first opening along the direction correspondence of accurate bus is formed through;
Wherein, described accurate bus be on described first edge of opening a bit and the line of any on described second edge of opening, a bit being formed by fiducial axis line cross section is crossing with described first edge of opening on described first edge of opening, a bit being formed by described fiducial axis line cross section is crossing with described second edge of opening on described second edge of opening, described fiducial axis line cross section is for limit and perpendicular to the plane of described upper surface and described lower surface with the axis of described submersed nozzle.
2. submersed nozzle according to claim 1, it is characterized in that, the edge of described second opening comprises: left hand edge, top edge, right hand edge and lower limb, described left hand edge, top edge, right hand edge and lower limb are connected to surround the second opening successively, described left hand edge and described right hand edge are about the Y direction symmetry in the plane at place, described lower surface, described top edge and described lower limb are symmetrical about the X-direction in the plane at place, described lower surface, and X-direction is mutually vertical with Y direction and all by the center of described second opening.
3. submersed nozzle according to claim 2, it is characterized in that, described left hand edge comprises upper left section, lower-left section and the first central segment between described upper left section and described lower-left section, one end of described upper left section, one end of described first central segment are connected successively with other end one end with described lower-left section, and described first central segment is vertical line segment;
Top edge comprises upper left section, upper right section and the second central segment between described upper left section and described upper right section, one end of described upper left section, one end of described second central segment are connected successively with other end one end with described upper right section, the other end of described upper left section is connected with the other end of described upper left section, and described second central segment is horizontal line section.
4. submersed nozzle according to claim 3, it is characterized in that, the junction of the junction of the junction of described lower-left section and described first central segment, described first central segment and described upper left section, described upper left section and described upper left section, described upper left section with the equal rounding in junction of the junction of described second central segment, described second central segment and described upper right section.
5. submersed nozzle according to claim 1, is characterized in that, the 3rd opening is contained in the cross section of the formation crossing with described sidewall of the horizontal plane perpendicular to described sidewall axis, the edge edge and corner position rounding of described 3rd opening.
6. submersed nozzle according to claim 1, is characterized in that, the upper surface of described sidewall is annular, and the lower surface of described sidewall is cylindrical inner cross shape combination shape.
7. an arrangement for square parison casting submersed nozzle, is characterized in that, described arrangement is as follows:
In crystallizer, pour into a mould region place a submersed nozzle;
The axis of described submersed nozzle overlaps with the center line pouring into a mould region in described crystallizer;
Wherein, described submersed nozzle is the submersed nozzle described in claim arbitrary in the claims 1 ~ 6.
8. arrangement according to claim 7, is characterized in that, the upper surface of described submersed nozzle is connected with the bottom of tundish.
9. the arrangement according to claim 7 or 8, is characterized in that, after the lower surface insertion molten steel of described submersed nozzle, the subsurface distance range of top molten steel deeply to described crystallizer is 20mm ~ 80mm.
10. arrangement according to claim 7, is characterized in that, the axis of described submersed nozzle overlaps with the center line of square parison.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407688.0U CN204035548U (en) | 2014-07-22 | 2014-07-22 | Square parison casting submersed nozzle and arrangement thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407688.0U CN204035548U (en) | 2014-07-22 | 2014-07-22 | Square parison casting submersed nozzle and arrangement thereof |
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| CN204035548U true CN204035548U (en) | 2014-12-24 |
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| CN201420407688.0U Expired - Fee Related CN204035548U (en) | 2014-07-22 | 2014-07-22 | Square parison casting submersed nozzle and arrangement thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117666A (en) * | 2014-07-22 | 2014-10-29 | 莱芜钢铁集团有限公司 | Submersed nozzle for casting rectangular blank and arrangement mode thereof |
| CN106141157A (en) * | 2015-03-23 | 2016-11-23 | 上海宝钢工业技术服务有限公司 | Anti-blocking immersion nozzle for molten steel water conservancy diversion |
-
2014
- 2014-07-22 CN CN201420407688.0U patent/CN204035548U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117666A (en) * | 2014-07-22 | 2014-10-29 | 莱芜钢铁集团有限公司 | Submersed nozzle for casting rectangular blank and arrangement mode thereof |
| CN104117666B (en) * | 2014-07-22 | 2016-01-20 | 莱芜钢铁集团有限公司 | Square parison casting submersed nozzle and arrangement thereof |
| CN106141157A (en) * | 2015-03-23 | 2016-11-23 | 上海宝钢工业技术服务有限公司 | Anti-blocking immersion nozzle for molten steel water conservancy diversion |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160722 |