CN210254221U - Immersion type water gap of H-shaped anti-leakage steel - Google Patents
Immersion type water gap of H-shaped anti-leakage steel Download PDFInfo
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- CN210254221U CN210254221U CN201921074802.1U CN201921074802U CN210254221U CN 210254221 U CN210254221 U CN 210254221U CN 201921074802 U CN201921074802 U CN 201921074802U CN 210254221 U CN210254221 U CN 210254221U
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Abstract
The utility model discloses an immersion nozzle of H type bleed-out prevention belongs to steel continuous casting technical field. An H-shaped steel leakage prevention submerged nozzle comprises a nozzle main body, an upward retaining dam, an upward inclined steel outlet, a downward retaining dam and a downward inclined steel outlet; the upper part of the water gap main body is of a bowl mouth structure, the lower part of the water gap main body is of a hollow cylindrical structure with a smooth inner cavity, and the bottom end of the water gap main body is of a closed structure; the upper part of the bowl mouth structure is a large-aperture hollow cylinder, and the lower end of the bowl mouth structure is a conical structure; a pair of upward-inclined steel outlet holes are symmetrically formed in the middle lower portion of the hollow cylindrical structure of the water gap main body, a pair of upward retaining dams are symmetrically arranged on the lower portion of the upward-inclined steel outlet holes, a pair of downward retaining dams are symmetrically arranged on the lower portion of the upward retaining dams, and a pair of downward-inclined steel outlet holes are symmetrically formed in the lower portion of the downward retaining dams. The utility model discloses reducible molten steel directly erodes the solidification shell, avoids the emergence of bleed-out, improves production efficiency, reduction in production cost.
Description
Technical Field
The utility model belongs to the technical field of steel continuous casting, mainly relate to an immersion nozzle of H type bleed-out prevention.
Background
The breakout is a phenomenon that in the initial stage of continuous casting or in the process of pouring, because of too fast drawing speed and uneven heat transfer of a solidified blank shell, slag is coiled by covering slag or the solidified blank shell is washed by other external force to cause the molten steel in the solidified blank shell to flow out. Breakout is one of the serious accidents in the continuous casting production process, the yield of metal is reduced due to light steel, secondary cooling devices are burnt out by heavy steel, continuous casting is interrupted, and the life safety of workers is threatened.
The breakout forms are various and mainly comprise cast breakout, suspended breakout, crack breakout, slag inclusion breakout, cut breakout, bonded breakout and the like. The main factors influencing the occurrence of bleed-out are: the drawing speed is inconsistent with the superheat degree, the casting slag of the crystallizer and the blank shell is poor, the cold zone effect of the secondary cold zone is poor, the pouring flow of the tundish is eccentric, the molten steel scours and solidifies the blank shell and the like. The molten steel scouring solidifies the billet shell to break and break the solidified thin billet which is just generated, so that the billet shell is broken or the thickness of the billet shell entering a secondary cooling area cannot meet the requirement, the solidified billet shell is weak, the strength is reduced, and the static pressure of the molten steel is difficult to bear, so that steel leakage is caused.
In order to prevent the breakout, a submerged entry nozzle is used, which mainly functions to prevent the secondary oxidation and splashing of the molten steel, and to adjust the flow state and the injection speed of the molten steel, which have a decisive influence on the yield and quality of the continuous casting. At present, the inner wall of a submerged nozzle is in a straight-up and straight-down cylindrical shape, impurities are easily accumulated on the inner wall in the pouring process, the phenomenon of water gap blocking is caused, continuous casting and pouring cannot be smoothly carried out, molten steel flowing into a crystallizer of the submerged nozzle with steel tapped at two sides directly erodes the surrounding solidified blank shell, and the reason is the main reason for casting blank leakage.
In order to solve the problem of bleed-out that the steel tapping of current immersion nozzle both sides directly erodees the solidification blank shell and leads to, the utility model discloses an immersion nozzle of H type bleed-out is prevented.
Disclosure of Invention
The utility model aims at providing a submersed nozzle of H type bleed-out prevention to reach and reduce the molten steel and directly erode the solidification shell number of times, improve production efficiency, reduction in production cost's purpose.
The utility model discloses a realize through following technical scheme:
an H-shaped steel leakage prevention submerged nozzle comprises a nozzle main body, an upward retaining dam, an upward inclined steel outlet, a downward retaining dam and a downward inclined steel outlet; the upper part of the water gap main body is of a bowl mouth structure, the lower part of the water gap main body is of a hollow cylindrical structure with a smooth inner cavity, and the bottom end of the water gap main body is of a closed structure; the upper part of the bowl mouth structure is a large-aperture hollow cylinder, the lower end of the bowl mouth structure is a conical structure, and the bottom of the conical structure is consistent with the inner diameter of the hollow cylinder structure at the lower part of the water gap main body in size; the steel tapping device is characterized in that a pair of upward-inclined steel outlet holes are symmetrically formed in the middle lower portion of a hollow cylindrical structure of the water gap main body, a pair of upward retaining dams are symmetrically arranged on the hollow cylindrical structure of the lower portion of the upward-inclined steel outlet holes, a pair of downward retaining dams are symmetrically arranged on the hollow cylindrical structure of the lower portion of the upward retaining dams, and a pair of downward-inclined steel tapping holes are symmetrically formed in the hollow cylindrical structure of the lower portion of the downward retaining dams.
Further, the bowl mouth structure is conical structure, and conical structure lower part intercommunication the smooth hollow cylinder structure of mouth of a river main part lower part inner chamber, the bottom is closed structure.
The steel outlet port inclining upwards and the steel outlet port inclining downwards are rectangular steel outlet ports.
The sectional area of the upward inclined steel outlet is smaller than that of the downward inclined steel outlet.
The sectional area of the downward inclined steel tapping hole is equivalent to that of the hollow cylindrical structure.
The opening angle of the upward-inclined steel outlet is upward inclined and is 60 degrees with the axial direction of the hollow cylindrical structure.
The downward-inclined steel tapping hole is provided with an angle downward inclined at 60 degrees with the axial direction of the hollow cylindrical structure.
The upward dam and the downward dam are L-shaped, the upper end of the upward dam and the lower end of the downward dam are semi-cylindrical, the diameters of the semi-cylindrical upper and the semi-cylindrical lower are equal, the semi-cylindrical upper and the lower ends of the upward dam and the lower end of the downward dam are parallel to each other, and an included angle formed between the lower end of the upward dam and the upper end of the downward dam is 120 degrees.
The bottom end of the hollow cylindrical structure is of a concave spherical closed structure.
The length of the upper end of the upward dam is larger than that of the lower end of the downward dam, so that a part of molten steel can directly flow into the vicinity of the liquid level, heat is provided, and the covering slag is melted.
The utility model is provided with a bowl mouth structure or a conical structure at the top of the nozzle body, and two pairs of steel-tapping holes and two sides of dams are symmetrically arranged at the middle lower part of the nozzle body, the inclination angles of the steel-tapping holes and the nozzle body are respectively 60 degrees upwards or downwards, and the ends of the upwards dam and the downwards baffle are parallel to the cylindrical structure at the lower part of the nozzle body; the diameter of the upper end of the bowl opening structure or the conical structure at the top of the nozzle main body is larger than the diameter of the inner cavity of the cylindrical structure at the lower part of the nozzle main body, the bowl opening structure or the conical structure is tightly connected with the inner cavity of the cylindrical structure at the lower part of the nozzle main body, and the gap at the joint is avoided, so that molten steel contacts with air for secondary oxidation; the upward-inclined steel outlet and the upward dam can enable part of molten steel to flow to the liquid level of the crystallizer, the temperature of the liquid level is guaranteed, the formation of liquid-state covering slag is facilitated, the sectional area of the upward-inclined steel outlet is small, certain heat is mainly provided by the molten steel to melt the liquid-state covering slag, and meanwhile, the liquid level is not fluctuated; the downward-inclined steel outlet and the downward-inclined dam can effectively prevent molten steel flowing out of the side hole from directly scouring a solidified shell on the wall of the crystallizer, steel leakage is prevented, meanwhile, the dam is downward, the molten steel flows downward, the liquid level of the crystallizer is guaranteed to be stable, the sectional area of the downward-inclined steel outlet is large, the flow speed of the molten steel is reduced when the molten steel flows from the inner cavity of the water gap to the steel outlet, the impact of the flowing molten steel on the molten steel in the crystallizer is weakened, and the flowing of the molten steel in the crystallizer is further stabilized; the upper and lower pairs of baffles mainly prevent molten steel flowing out of the submerged nozzle from directly scouring the solidified blank shell, and avoid steel leakage.
To sum up, the utility model discloses reducible molten steel directly erodes the solidification blank shell, avoids the emergence of bleed-out, improves production efficiency, reduction in production cost.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view at A of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a schematic structural view of embodiment 2;
in the figure: 1-bowl mouth structure, 2-water gap main body, 3-upward dam, 4-upward inclined steel outlet, 5-downward dam and 6-downward inclined steel outlet.
Detailed Description
The following provides a further description of the present invention with reference to the drawings and examples.
Example 1
The submerged nozzle of H-shaped anti-leakage steel as shown in figure 1 comprises a nozzle main body 2, an upward dam 3, an upward inclined steel outlet 4, a downward dam 5 and a downward inclined steel outlet 6; the upper part of the water gap main body 2 is a bowl mouth structure 1, the lower part of the water gap main body is a hollow cylindrical structure with a smooth inner cavity, and the bottom end of the water gap main body is a closed structure; the upper part of the bowl mouth structure 1 is a large-aperture hollow cylinder, the lower end of the bowl mouth structure is a conical structure, and the bottom of the conical structure is consistent with the inner diameter of the hollow cylinder structure at the lower part of the water gap main body in size; the middle lower part of the hollow cylindrical structure of the water gap main body 2 is symmetrically provided with a pair of upward inclined steel outlet 4, the hollow cylindrical structure at the lower part of the upward inclined steel outlet 4 is symmetrically provided with a pair of upward dams 3, the hollow cylindrical structure at the lower part of the upward dams 3 is symmetrically provided with a pair of downward dams 5, and the hollow cylindrical structure at the lower part of the downward dams 5 is symmetrically provided with a pair of downward inclined steel outlet 6.
As shown in fig. 2 and 3, the upward-inclined steel outlet 4 and the downward-inclined steel outlet 6 are rectangular steel outlets, wherein the sectional area of the upward-inclined steel outlet 4 is smaller than that of the downward-inclined steel outlet 6, the sectional area of the downward-inclined steel outlet 6 is equivalent to that of the hollow cylindrical structure, the opening angle of the upward-inclined steel outlet 4 is inclined upward, and is 60 degrees with respect to the axial direction of the hollow cylindrical structure, and the opening angle of the downward-inclined steel outlet 6 is inclined downward, and is 60 degrees with respect to the axial direction of the hollow cylindrical structure; the upward dam 3 and the downward dam 5 are L-shaped, the upper end of the upward dam 3 and the lower end of the downward dam 5 are both semi-cylindrical, have the same diameter and are parallel to the hollow cylindrical structure, the length of the upper end of the upward dam 3 is greater than that of the lower end of the downward dam 5, and the included angle between the lower end of the upward dam 3 and the upper end of the downward dam 5 is 120 degrees.
Example 2
The submerged nozzle of H-shaped anti-leakage steel as shown in FIG. 4 comprises a nozzle main body 2, an upward dam 3, an upward inclined steel outlet 4, a downward dam 5 and a downward inclined steel outlet 6; the upper part of the water gap main body 2 is a bowl mouth structure 1, the lower part of the water gap main body is a hollow cylindrical structure with a smooth inner cavity, and the bottom end of the water gap main body is a concave spherical surface closed structure; the bowl mouth structure 1 is a conical structure, the bottom of the conical structure is communicated with the hollow cylindrical structure, and the inner diameter of the bottom of the conical structure is consistent with the inner diameter of the hollow cylindrical structure in size; the middle lower part of the hollow cylindrical structure of the water gap main body 2 is symmetrically provided with a pair of upward inclined steel outlet 4, the hollow cylindrical structure at the lower part of the upward inclined steel outlet 4 is symmetrically provided with a pair of upward dams 3, the hollow cylindrical structure at the lower part of the upward dams 3 is symmetrically provided with a pair of downward dams 5, and the hollow cylindrical structure at the lower part of the downward dams 5 is symmetrically provided with a pair of downward inclined steel outlet 6.
The steel tapping hole 4 is inclined upwards, the steel tapping hole 6 is inclined downwards, the cross section area of the steel tapping hole 4 is smaller than that of the steel tapping hole 6, the cross section area of the steel tapping hole 6 is equivalent to that of the hollow cylindrical structure, the opening angle of the steel tapping hole 4 is inclined upwards, the angle is 60 degrees with the axial direction of the hollow cylindrical structure, the opening angle of the steel tapping hole 6 is inclined downwards, and the angle is 60 degrees with the axial direction of the hollow cylindrical structure; the upward dam 3 and the downward dam 5 are L-shaped, the upper end of the upward dam 3 and the lower end of the downward dam 5 are both semi-cylindrical, have the same diameter and are parallel to the hollow cylindrical structure, the length of the upper end of the upward dam 3 is greater than that of the lower end of the downward dam 5, and the included angle between the lower end of the upward dam 3 and the upper end of the downward dam 5 is 120 degrees.
The above embodiments are only preferred technical solutions of the present invention, and are not used to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An H-shaped steel leakage prevention submerged nozzle is characterized by comprising a nozzle main body, an upward dam, an upward inclined steel outlet, a downward dam and a downward inclined steel outlet; the upper part of the water gap main body is of a bowl mouth structure, the lower part of the water gap main body is of a hollow cylindrical structure with a smooth inner cavity, and the bottom end of the water gap main body is of a closed structure; the upper part of the bowl mouth structure is a large-aperture hollow cylinder, the lower end of the bowl mouth structure is a conical structure, and the bottom of the conical structure is consistent with the inner diameter of the hollow cylinder structure at the lower part of the water gap main body in size; the steel tapping device is characterized in that a pair of upward-inclined steel outlet holes are symmetrically formed in the middle lower portion of a hollow cylindrical structure of the water gap main body, a pair of upward retaining dams are symmetrically arranged on the hollow cylindrical structure of the lower portion of the upward-inclined steel outlet holes, a pair of downward retaining dams are symmetrically arranged on the hollow cylindrical structure of the lower portion of the upward retaining dams, and a pair of downward-inclined steel tapping holes are symmetrically formed in the hollow cylindrical structure of the lower portion of the downward retaining dams.
2. The submersed nozzle of claim 1, wherein the bowl opening structure is a conical structure, and the lower portion of the conical structure is communicated with a smooth hollow cylindrical structure in the inner cavity of the lower portion of the nozzle body.
3. The H-type leak-proof submerged entry nozzle as claimed in claim 1 or 2, wherein the upwardly-inclined tap hole and the downwardly-inclined tap hole are rectangular tap holes.
4. The H-type leakage-proof submerged entry nozzle of claim 1 or 2, wherein the sectional area of the upwardly inclined tap hole is smaller than the sectional area of the downwardly inclined tap hole.
5. The H-type leak-proof submerged entry nozzle as claimed in claim 1 or 2, wherein the cross-sectional area of the downwardly inclined tap hole is equivalent to the cross-sectional area of the hollow cylindrical structure.
6. The H-type steel leakage preventing submerged nozzle according to claim 1 or 2, wherein the opening angle of the upwardly inclined steel outlet is inclined upwardly at 60 ° to the axial direction of the hollow cylindrical structure.
7. The H-type breakout protected submerged entry nozzle of claim 1 or 2, wherein the opening angle of the downwardly inclined tap hole is inclined downwardly at 60 ° to the axial direction of the hollow cylindrical structure.
8. The H-type steel leakage preventing submerged nozzle as claimed in claim 1 or 2, wherein the upward dam and the downward dam are formed in an L-shape, the upper end of the upward dam and the lower end of the downward dam are formed in a semi-cylindrical shape having the same diameter and being parallel to the hollow cylindrical structure, and an angle formed between the lower end of the upward dam and the upper end of the downward dam is 120 °.
9. The H-type breakout protected submerged entry nozzle according to claim 8, wherein the length of the upper end of the upper dam is greater than the length of the lower end of the lower dam.
10. The H-type steel leakage preventing submerged nozzle of claim 1 or 2, wherein the bottom end of the hollow cylindrical structure is a concave spherical closed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921074802.1U CN210254221U (en) | 2019-07-10 | 2019-07-10 | Immersion type water gap of H-shaped anti-leakage steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921074802.1U CN210254221U (en) | 2019-07-10 | 2019-07-10 | Immersion type water gap of H-shaped anti-leakage steel |
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| CN210254221U true CN210254221U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181033A (en) * | 2019-07-10 | 2019-08-30 | 山西通才工贸有限公司 | A kind of submersed nozzle of H-type steel-leakage preventing |
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- 2019-07-10 CN CN201921074802.1U patent/CN210254221U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181033A (en) * | 2019-07-10 | 2019-08-30 | 山西通才工贸有限公司 | A kind of submersed nozzle of H-type steel-leakage preventing |
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