CN214349589U - Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer - Google Patents
Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer Download PDFInfo
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- CN214349589U CN214349589U CN202023281886.1U CN202023281886U CN214349589U CN 214349589 U CN214349589 U CN 214349589U CN 202023281886 U CN202023281886 U CN 202023281886U CN 214349589 U CN214349589 U CN 214349589U
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Abstract
The utility model discloses a two hole immersion nozzle for high pulling speed steel billet continuous casting crystallizer, including body (1), body (1) inside is provided with main water hole (2), main water hole (2) are including upper end (3), interlude (4), side water hole (5) and mouth of a river bottom (6) that are linked together in proper order, upper end (3) are hourglass hopper-shaped structure, side water hole (5) are two and two side water hole (5) are the symmetrical structure that has a down dip, mouth of a river bottom (6) are including concave circular arc surface structure (7) that two symmetries set up, two be connected with bellied reposition of redundant personnel step (8) that makes progress between concave circular arc surface structure (7). The utility model discloses a change in the mouth of a river the strand flow direction and reduce the strand flow energy, ensure that side water hole department strand flow kinetic energy descends, and then restrain the crystallizer liquid level undulant, effectively reduce the liquid level and roll up the sediment, restrain the steel billet defect and produce.
Description
Technical Field
The utility model relates to a two hole immersion nozzle for high pulling speed steel billet continuous casting crystallizer belongs to steel billet continuous casting technical field.
Background
With the continuous development and progress of national economy and science and technology, the steel industry is developed rapidly, and the continuous casting technology thoroughly changes the production flow of a steel-making workshop by virtue of the advantages of high efficiency and low cost. At present, steel production enterprises in China basically realize full continuous casting, but the technical application problems of a high-drawing-speed continuous casting technology, an automatic continuous casting technology, a low-cost continuous casting technology and the like are urgently needed to be overcome.
The crystallizer is one of main devices of a continuous casting technology, plays a key role in the continuous casting process, the flowing form of molten steel in the crystallizer plays a decisive role in the quality of a casting blank, and the main factor influencing the flowing form of the molten steel is the submerged nozzle structure. Patent document CN201470879U discloses an improved tundish submerged nozzle, which comprises a discharge hole arranged at the lower part of the nozzle, the discharge hole is arranged obliquely downwards, the included angle formed between the axis of the discharge hole and the horizontal plane is 17 °, and a pit is arranged at the bottom of the nozzle below the discharge hole. The structure can effectively adjust the flow direction and the flow speed of the liquid passing through the discharge port, and improve the liquid state, thereby eliminating the phenomenon of turning over of the liquid level at the corner of the crystallizer. However, with the development of high-casting-speed continuous casting technology, the submerged nozzle of the type is difficult to effectively control the flowing state of molten steel rapidly impacted from a tundish, and the problems of backflow slag entrapment, vortex slag entrapment and the like on the molten steel surface of a crystallizer are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem that prior art exists, provide a two hole immersion nozzle for high casting speed steel billet continuous casting crystallizer to overcome prior art's weak point, ensure under high casting speed continuous casting condition, there is not the backward flow to roll up sediment, swirl in the crystallizer steel liquid level and roll up the sediment phenomenon, can promote inclusion come-up in the crystallizer molten steel simultaneously, ensure to obtain high-quality steel billet.
In order to solve the technical problem, the utility model discloses a technical scheme does:
the utility model provides a two hole immersion nozzle for high pulling speed billet continuous casting crystallizer, includes the body, the inside main water hole that is provided with of body, main water hole is including upper end, interlude, side water hole and the mouth of a river bottom that is linked together in proper order, the upper end is hourglass hopper-shaped structure, the side water hole is two and two the side water hole is the symmetrical structure that has a down dip, the mouth of a river bottom is including the concave arc surface structure that two symmetries set up, two be connected with the bellied reposition of redundant personnel step that makes progress between the concave arc surface structure.
The length direction of the shunting step is perpendicular to the central line of the side water hole.
The middle section is of a cylindrical structure with an equal section.
The downward inclination angle of the side water hole is 15-25 degrees.
The radius of the arc surface of the concave arc surface structure is 20-30 mm.
The step width of the shunting step is 3-8 mm.
The side water hole penetrates through the side wall of the body.
The utility model provides a pair of two hole immersion nozzle are used to high pulling speed steel billet continuous casting crystallizer, the mouth of a river bottom is two symmetric distribution's recessed arc surface structure, this structure is through changing the interior strand flow direction of mouth of a river, produces local convection current in the mouth of a river bottom and reduces strand flow energy, ensures that side water hole department strand flow kinetic energy descends, and then restraines the crystallizer liquid level and undulant, effectively reduces crystallizer liquid level backward flow and rolls up sediment and swirl and roll up the sediment, promotes crystallizer inclusion come-up simultaneously, restraines the steel billet defect and produces, promotes the steel billet quality.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a two hole immersion nozzle for high pulling speed billet continuous casting crystallizer, includes body 1, body 1 is inside to be provided with main water hole 2, main water hole 2 includes upper end 3, interlude 4, side water hole 5 and mouth of a river bottom 6 that from the top down is linked together in proper order, upper end 3 is for leaking hopper-shaped structure and is connected with the centre package, side water hole 5 is two and two side water hole 5 is the symmetrical structure that declines, mouth of a river bottom 6 includes the concave arc surface structure 7 of two symmetries setting, two be connected with the bellied reposition of redundant personnel step 8 that makes progress between the concave arc surface structure 7.
The length direction of the shunting step 8 is perpendicular to the central line of the side water hole 5, namely, in the embodiment, a convex shunting step is arranged between the concave arc surfaces symmetrically distributed at the bottom 6 of the water gap, and the length direction of the shunting step is perpendicular to the central lines of the water outlet holes at the two sides of the water gap. The vertical distribution in the present embodiment refers to a spatial directional vertical relationship.
The middle section 4 is a cylindrical structure with a uniform cross section.
In this embodiment, the upper portion size of the funnel-shaped structure of upper end 3 is a bit bigger than the size of the middle package outlet, and interlude 4 is the cylindric structure of uniform cross-section, and the drum internal diameter is 70mm, and the downtilt angle of side water hole 5 is 25, and mouth of a river bottom 6 is two symmetrical concave circular arc surface structures 7, and the circular arc surface radius is 20mm, and the width of reposition of redundant personnel step 8 between two circular arc surfaces is 6.5 mm.
In the embodiment, the flow direction and the flow speed of molten steel in the water holes 5 under the high-pulling-speed continuous casting condition are effectively regulated and controlled by adjusting the downward inclination angle of the water holes 5, the radius of the concave circular arc at the bottom 6 of the water gap and the width of the shunting step 8, so that the phenomena of backflow slag entrainment and vortex slag entrainment on the molten steel surface of the crystallizer are inhibited, the floating of impurities in the molten steel of the crystallizer is promoted, and the quality of continuous casting billets is improved.
Example 2
The present embodiment is different from embodiment 1 only in that the downward inclination angle of the side water hole 5 is 20 to 25 °, and more preferably 20 °. The radius of the arc surface of the concave arc surface structure 7 is 30 mm. The step width of the shunting step 8 is 3 mm. The middle section 4 is a cylindrical structure with a uniform section, and the inner diameter of the cylinder is 60 mm.
Example 3
The present embodiment is different from embodiment 1 only in that the downward inclination angle of the side water holes 5 is 15 °. The radius of the circular arc surface of the concave circular arc surface structure 7 is 25 mm. The step width of the shunting step 8 is 8 mm. The middle section 4 is a cylindrical structure with a uniform section, and the inner diameter of the cylinder is 80 mm.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed to reflect the intent as follows: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this description, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as described herein. Moreover, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a high casting speed billet continuous casting crystallizer is with two hole immersion nozzle which characterized in that: the water-saving water faucet comprises a body (1), wherein a main water hole (2) is formed in the body (1), the main water hole (2) comprises an upper end (3), a middle section (4), side water holes (5) and a water gap bottom (6) which are sequentially communicated, the upper end (3) is of a funnel-shaped structure, the number of the side water holes (5) is two, the number of the side water holes (5) is a downward-inclined symmetrical structure, the water gap bottom (6) comprises two symmetrically-arranged concave arc surface structures (7), and an upward-convex shunting step (8) is connected between the two concave arc surface structures (7);
the radius of the arc surface of the concave arc surface structure (7) is 20-30 mm;
the step width of the shunting step (8) is 3-8 mm.
2. The two-hole submerged nozzle for the high-pulling-speed billet continuous casting crystallizer of claim 1, wherein: the length direction of the shunting step (8) is vertical to the central line of the side water hole (5).
3. The two-hole submerged nozzle for the high-pulling-speed billet continuous casting crystallizer of claim 1, wherein: the middle section (4) is of a cylindrical structure with an equal cross section.
4. The two-hole submerged nozzle for the high-pulling-speed billet continuous casting crystallizer of claim 1, wherein: the downward inclination angle of the side water hole (5) is 15-25 degrees.
5. The two-hole submerged nozzle for the high-pulling-speed billet continuous casting crystallizer of claim 1, wherein: the side water hole (5) penetrates through the side wall of the body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023281886.1U CN214349589U (en) | 2020-12-30 | 2020-12-30 | Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023281886.1U CN214349589U (en) | 2020-12-30 | 2020-12-30 | Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer |
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| CN214349589U true CN214349589U (en) | 2021-10-08 |
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| CN202023281886.1U Active CN214349589U (en) | 2020-12-30 | 2020-12-30 | Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338397A (en) * | 2022-07-20 | 2022-11-15 | 中冶赛迪工程技术股份有限公司 | Process arrangement structure of water gap and using method |
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2020
- 2020-12-30 CN CN202023281886.1U patent/CN214349589U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338397A (en) * | 2022-07-20 | 2022-11-15 | 中冶赛迪工程技术股份有限公司 | Process arrangement structure of water gap and using method |
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