CN217121733U - Immersion type water gap - Google Patents
Immersion type water gap Download PDFInfo
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- CN217121733U CN217121733U CN202220622935.3U CN202220622935U CN217121733U CN 217121733 U CN217121733 U CN 217121733U CN 202220622935 U CN202220622935 U CN 202220622935U CN 217121733 U CN217121733 U CN 217121733U
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- separation block
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- conservancy diversion
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Abstract
The utility model belongs to the technical field of refractory material for the continuous casting, concretely relates to immersion nozzle, including mouth of a river body, mouth of a river body include from last to the bowl mouth portion that connects gradually down, with footpath portion, first reducing portion and second reducing portion, second reducing portion in set up water conservancy diversion separation block, with the internal wall of footpath portion inject the inlet hole, the bottom that the inlet hole extends to first reducing portion be connected with water conservancy diversion separation block, water conservancy diversion separation block upper portion at the bottom of the inboard inlet hole of first reducing portion, water conservancy diversion separation block on set up the stationary flow structure, inlet hole exit be the shape of falling the ladder. The water gap is improved on the existing basis to increase a steady flow structure, the fluctuation of the liquid level of the crystallizer can be effectively reduced, and the continuous casting effect can be fully exerted.
Description
Technical Field
The utility model belongs to the technical field of refractory material for the continuous casting, concretely relates to immersion nozzle.
Background
The continuous casting of steel is a process of continuously cooling liquid steel with a certain superheat degree into a solid casting blank with a certain shape through a water-cooled crystallizer. With the application and development of continuous casting technology, especially because of the higher and higher requirements of users on the quality of steel and the intense competition of international markets, the quality of continuous casting billets is more and more emphasized, and the important work in continuous casting production is to strictly control the cleanliness of molten steel and reduce the defects of the casting billets.
The crystallizer, as the "heart" of the continuous casting machine, is the origin of most surface defects and internal quality problems of the continuous casting slab. Statistics show that nearly 80% of surface defects of a casting blank originate from a crystallizer, and the surface defects are the last ring for controlling the quality of molten steel in various process links of continuous casting and determine the surface quality of the casting blank and the content and distribution of non-metallic inclusions. The flowing state of the molten steel in the crystallizer directly influences the quality of the casting blank and the content and distribution of the non-metallic inclusions. At present, the method for improving the flow of molten steel in the crystallizer mainly comprises the technologies of electromagnetic stirring, electromagnetic braking and the like of the crystallizer, and as the crystallizer is made of a water-filled copper plate, a magnetic field is shielded by the copper plate and can be greatly attenuated, so that the action and the efficiency of the electromagnetic field are seriously influenced.
The submerged entry nozzle (submerged entry nozzle) is a refractory pouring sleeve installed at the bottom of a tundish in continuous steel casting equipment and inserted below the liquid level of molten steel in a crystallizer, and in the continuous casting process, the molten steel after refining is treated by the tundish and then is continuously injected into the crystallizer through the submerged entry nozzle to be cooled and solidified. The submerged nozzle protects the molten steel flow, prevents the molten steel from secondary oxidation, and simultaneously changes the flowing state of the molten steel in the crystallizer, and the flowing in the continuous casting crystallizer also has great influence on the quality and the yield of the continuous casting blank. The uneven discharge amount of the molten steel of each discharge hole caused by the bias flow of the molten steel in the immersion nozzle causes the fluctuation of the liquid level in the crystallizer, the defect of slag entrapment is easily formed, and the intensity of the fluctuation of the liquid level is aggravated along with the improvement of the continuous casting pulling speed, so the implementation of high-speed continuous casting is limited, and the greater economic benefit cannot be obtained. It is also very important that: because the upper corner of the discharge hole of the prior submerged nozzle is easy to limit the flowing of molten steel to form a negative pressure area, the molten steel and the protective slag are sucked and flow into the crystallizer again along with the main flow of the molten steel, so that the content of non-metallic inclusions in the molten steel is increased, and the quality of a casting blank is greatly influenced.
Basic research shows that the rotary flow of molten steel in a continuous casting immersion nozzle can effectively improve the uniformity and stability of the outlet flow of the nozzle, improve the flow state and temperature distribution in a crystallizer and reduce the meniscus liquid level fluctuation in the crystallizer; however, the swirl flow in the nozzle has an excellent influence on the flow of the molten steel in the crystallizer, and also has an adverse influence on the flow of the molten steel in the crystallizer, such as an increase in impact on the wide surface of the crystallizer. The prior submerged nozzle for continuous casting can not inhibit the adverse effect of the rotational flow in the nozzle on the flowing of the molten steel in the crystallizer, and can not completely meet the requirement of the rotational flow continuous casting in the nozzle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a immersion nozzle for continuous casting to the problem that exists among the prior art, this mouth of a river improves on current basis and increases the stationary flow structure, can effectively reduce the crystallizer liquid level fluctuation, the effect of ability full play continuous casting.
The technical scheme of the utility model is that:
the utility model provides an immersion nozzle, includes the mouth of a river body, the mouth of a river body include from last to down connected gradually the bowl mouth portion, with footpath portion, first variable diameter portion and second variable diameter portion, second variable diameter portion in set up the water conservancy diversion spacer block, with footpath portion inner wall inject the inlet hole, the inlet hole extend to the bottom and the water conservancy diversion spacer block of first variable diameter portion and be connected, water conservancy diversion spacer block upper portion at the bottom of the inlet hole of first variable diameter portion inboard, the water conservancy diversion spacer block on set up the stationary flow structure, inlet hole exit be the shape of falling the ladder.
Specifically, the flow stabilizing structure is a flow stabilizing hole, and the flow stabilizing hole horizontally penetrates through the flow guide separation block.
Specifically, the flow stabilizing hole is positioned at the middle lower part of the flow guide separating block.
Specifically, the hole diameter of the outlet parts at two ends of the flow stabilizing hole is larger than that of the middle hole.
Specifically, the steady flow structure comprises a steady flow vertical hole arranged in the middle of the flow guide separation block and a steady flow branch hole connected with the steady flow vertical hole, and the diameter of the steady flow vertical hole is larger than that of the steady flow branch hole.
Specifically, the number of the steady flow branch holes is at least four, every two steady flow branch holes are symmetrically and obliquely extended to the lateral lower part of the flow guide separation block, and the outlets of the steady flow branch holes are formed in the lateral side of the lower part of the flow guide separation block.
Specifically, the steady flow structure be the spiral passageway from last to bottom that sets up in the water conservancy diversion separator block, spiral passageway include multilayer annular channel, the annular channel end to end of adjacent layer.
Specifically, the spiral channel comprises a spiral channel inlet and a spiral channel outlet, the spiral channel inlet is positioned in the middle of the upper end of the flow guide separation block and corresponds to the inlet hole, and the spiral channel outlet is positioned in the middle of the lower end of the flow guide separation block.
Specifically, the inlet at the upper end of the flow guide separation block is arc-shaped, the radius of the arc is 15mm, and the diameter of the widest part of the flow guide separation block is 76 mm.
The utility model has the advantages that: the utility model discloses an improvement to current mouth of a river, be connected the bottom of inlet hole directly with the water conservancy diversion separation block, remove the interval between inlet hole and the water conservancy diversion separation block, reducible molten iron that gets into from the inlet hole is to the impact of water conservancy diversion separation block, and set up the stationary flow structure on the water conservancy diversion separation block, reposition of redundant personnel and the stationary flow effect through the stationary flow structure can disperse the molten iron of water conservancy diversion separation block both sides, the volume of gushing water of the export of water conservancy diversion separation block both sides has been balanced, consequently, further can prevent because of the volume of gushing water the phenomenon that the liquid level fluctuates appears greatly. This use novel improvement that provides can even the mouth of a river effluence, reduce the crystallizer liquid level fluctuation, prevent being drawn into of covering slag, effect that can full play continuous casting.
Drawings
Fig. 1 is a schematic cross-sectional view of a submerged nozzle provided in the present invention;
fig. 2 is a schematic side sectional view of a submerged entry nozzle provided in the present invention;
FIG. 3 is a schematic sectional view of a submerged entry nozzle provided in embodiment 1;
FIG. 4 is a schematic sectional view of a submerged entry nozzle according to embodiment 2;
FIG. 5 is a schematic cross-sectional view of a flow guiding and separating block of a submerged nozzle provided in embodiment 3.
1 same diameter part, 2 first diameter-changing part, 3 inlet hole, 4 second diameter-changing part, 5 diversion separation block,
6 steady flow holes, 7 steady flow branch holes, 8 steady flow vertical holes, 9 spiral channels, 10 spiral channel inlets,
11 spiral channel outlet.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2 is a pair of the utility model provides a section structure schematic diagram and side section structure schematic diagram of immersion nozzle, it includes the mouth of a river body, the mouth of a river body include from last bowl mouth portion, with footpath portion 1, first diameter change portion 2 and the second diameter change portion 4 that connects gradually down, second diameter change portion 4 in set up water conservancy diversion separating block 5, with 1 inner wall of footpath portion in inject inlet hole 3, inlet hole 3 extend to the bottom of first diameter change portion 2 and be connected with water conservancy diversion separating block 5, 5 upper portions of water conservancy diversion separating block push up at the bottom of the inlet hole of 2 inboards in first diameter change portion, water conservancy diversion separating block 5 on set up the stationary flow structure, 3 exits in inlet hole be the shape of falling the trapezoid.
Example 1
Fig. 3 is a schematic cross-sectional view of the submerged nozzle provided in this embodiment, the flow stabilizing structure of the submerged nozzle is a flow stabilizing hole 6, the flow stabilizing hole 6 horizontally penetrates through the flow guiding separation block 5, and the flow stabilizing hole 6 is located at the middle lower portion of the flow guiding separation block 5. The hole diameters of the outlets at the two ends of the flow stabilizing hole 6 are larger than the hole diameter of the middle part, and the flow stabilizing hole 6 horizontally penetrates through the flow guide separation block 5.
In the embodiment, the bottom of the inlet hole 3 is directly connected with the flow guide separation block 5, the flow stabilizing hole 6 is formed in the flow guide separation block, molten steel is directly divided by the flow guide separation block 5 when the molten steel is left from the inlet hole 3, and the flow stabilizing hole 6 is formed in the flow guide separation block 5, so that the condition that the flow rate of the molten steel is unbalanced at the outlet of a water gap is avoided, the fluctuation of the liquid level of a crystallizer is reduced, the outflow of the water gap can be uniform, the rolling-in of protective slag is prevented, and the continuous casting effect can be fully exerted.
Example 2
As shown in fig. 4, which is a schematic cross-sectional structure view of the submerged nozzle provided in the embodiment, the flow stabilizing structure disclosed in this embodiment includes a vertical flow stabilizing hole 8 disposed in the middle of the flow guiding separation block 5 and a branch flow stabilizing hole 7 connected to the vertical flow stabilizing hole 8, and a diameter of the vertical flow stabilizing hole 8 is greater than a diameter of the branch flow stabilizing hole 7. The number of the steady flow branch holes 7 is at least four, every two steady flow branch holes are symmetrically inclined and extend to the lower side of the flow guide separation block 5, and the outlets of the steady flow branch holes 7 are arranged on the side edge of the lower part of the flow guide separation block 5.
In this embodiment, the bottom of the inlet hole 3 is directly connected with the flow guide separation block 5, the flow stabilizing structure comprises a flow stabilizing vertical hole 6 arranged in the middle of the flow guide separation block 5 and a flow stabilizing branch hole 7 connected with the flow stabilizing vertical hole 6, the flow guide separation block 5 is flat, molten steel is directly shunted through the flow guide separation block 5 when being left from the inlet hole, the molten steel is shunted along the flow stabilizing vertical hole 6 inside the flow guide separation block 5, the molten steel is prevented from being unevenly separated by the flow guide separation block 5, the condition of unbalanced flow rate is generated at a water gap outlet, the liquid level fluctuation of a crystallizer is reduced, the outflow of the water gap can be equalized, the entrainment of protective slag is prevented, and the continuous casting effect can be fully exerted.
Example 3
As shown in fig. 5, which is a schematic cross-sectional structure view of a flow guiding separation block 5 of an immersion nozzle provided in an embodiment, the flow stabilizing structure in this embodiment is a spiral channel 9 arranged in the flow guiding separation block 5 from top to bottom, the spiral channel 9 includes a plurality of layers of annular channels, and the annular channels of adjacent layers are connected end to end. The spiral channel 9 comprises a spiral channel inlet 10 and a spiral channel outlet 11, the spiral channel inlet 10 is positioned in the middle of the upper end of the flow guide separation block 5 and corresponds to the inlet hole 3, and the spiral channel outlet 11 is positioned in the middle of the lower end of the flow guide separation block 5.
The inlet at the upper end of the diversion separation block 5 is arc-shaped, the radius of the arc is 15mm, and the diameter of the widest part of the diversion separation block 5 is 76 mm.
Spiral channel in this embodiment including spiral channel entry and spiral channel export, the spiral channel entry be located water conservancy diversion separation block upper end middle part and correspond the inlet hole, the spiral channel export be located water conservancy diversion separation block lower extreme middle part, by the inlet hole down the molten steel be the triplex simultaneously by the reposition of redundant personnel, two strands of molten steel disperse from water conservancy diversion separation block both sides, another strand then comes from the inside spiral channel reposition of redundant personnel of separation block, the water inflow of the export of water conservancy diversion separation block both sides has been balanced, consequently further can prevent to appear the undulant phenomenon of liquid level because of the water inflow is big, spiral channel has reduced the impact dynamics of molten steel, be difficult to cause the liquid level when reaching the export undulant. This use novel improvement that provides can even the mouth of a river effluence, reduce the crystallizer liquid level fluctuation, prevent being drawn into of covering slag, effect that can full play continuous casting.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (9)
1. The utility model provides an immersion nozzle, includes the mouth of a river body, the mouth of a river body include from last to down connected gradually the bowl mouth portion, with footpath portion (1), first variable diameter portion (2) and second variable diameter portion (4), second variable diameter portion (4) in set up water conservancy diversion separation block (5), with footpath portion (1) inner wall inject inlet hole (3), its characterized in that, inlet hole (3) extend to the bottom and the water conservancy diversion separation block (5) of first variable diameter portion (2) and be connected, water conservancy diversion separation block (5) upper portion push up the inlet hole bottom of first variable diameter portion (2) inboard, water conservancy diversion separation block (5) on set up the stationary flow structure, inlet hole (3) exit be the shape of falling the ladder.
2. Submerged entry nozzle according to claim 1, characterized in that the flow stabilizing structure is a flow stabilizing hole (6), and the flow stabilizing hole (6) extends horizontally through the flow guiding separation block (5).
3. Submerged entry nozzle according to claim 2, characterized in that said flow stabilizer (6) is located in the lower middle portion of the flow guiding separation block (5).
4. Submerged entry nozzle according to claim 2, characterized in that the orifice diameter of the outlet part at both ends of the flow stabilizer orifice (6) is larger than the orifice diameter in the middle part.
5. Submerged nozzle according to claim 1, characterized in that said flow stabilizing structure comprises a vertical flow stabilizing hole (8) arranged in the middle of said flow guiding separation block (5), and a branch flow stabilizing hole (7) connected to said vertical flow stabilizing hole (8), and the diameter of said vertical flow stabilizing hole (8) is larger than the diameter of said branch flow stabilizing hole (7).
6. Submerged nozzle according to claim 5, characterized in that the number of flow stabilizing branch holes (7) is at least four, and the flow stabilizing branch holes are symmetrically inclined and extend to the lower side of the flow guiding separation block (5), and the outlets of the flow stabilizing branch holes (7) are arranged on the lower side of the flow guiding separation block (5).
7. Submerged nozzle according to claim 1, characterized in that said flow stabilizing structure is a spiral channel (9) arranged in the flow guiding separation block (5) from top to bottom, said spiral channel (9) comprises a plurality of layers of annular channels, and the annular channels of adjacent layers are connected end to end.
8. Submerged entry nozzle according to claim 7, characterized in that the spiral channel (9) comprises a spiral channel inlet (10) and a spiral channel outlet (11), the spiral channel inlet (10) is located in the middle of the upper end of the flow guiding separation block (5) corresponding to the inlet hole (3), and the spiral channel outlet (11) is located in the middle of the lower end of the flow guiding separation block (5).
9. A submerged entry nozzle according to claim 1, characterised in that the inlet at the upper end of the flow guiding and separating block (5) is arc-shaped, the radius of the arc is 15mm, and the diameter of the widest part of the flow guiding and separating block (5) is 76 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220622935.3U CN217121733U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220622935.3U CN217121733U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217121733U true CN217121733U (en) | 2022-08-05 |
Family
ID=82644941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220622935.3U Active CN217121733U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217121733U (en) |
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2022
- 2022-03-21 CN CN202220622935.3U patent/CN217121733U/en active Active
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