CN217121735U - Immersion nozzle with steady flow structure for continuous casting - Google Patents
Immersion nozzle with steady flow structure for continuous casting Download PDFInfo
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- CN217121735U CN217121735U CN202220627848.7U CN202220627848U CN217121735U CN 217121735 U CN217121735 U CN 217121735U CN 202220627848 U CN202220627848 U CN 202220627848U CN 217121735 U CN217121735 U CN 217121735U
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Abstract
The utility model belongs to the technical field of refractory materials for continuous casting, in particular to an immersion nozzle with a steady flow structure for continuous casting, which comprises a nozzle body, the water gap body comprises an upper connecting part, a cylindrical uniform-section same-diameter part, a first variable-diameter part and a second variable-diameter part which are sequentially connected from top to bottom, a flow guide separation block is arranged in the second reducing part, an inlet hole is limited on the inner wall of the same-diameter part, the inlet hole extends to the bottom of the first diameter-changing part and is connected with the flow guide separation block, a flow stabilizing structure is arranged on the flow guide separation block, the outlet of the inlet hole is in an inverted trapezoid shape, the flow stabilizing structure comprises a flow stabilizing vertical hole arranged in the middle of the flow guide separation block and a flow stabilizing branch hole connected with the flow stabilizing vertical hole, the water gap is improved on the existing basis, 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 for continuous casting with stationary flow structure.
Background
A submerged entry nozzle (submerged entry nozzle) is a refractory casing for pouring which is installed at the bottom of a tundish and inserted below the molten steel level of a mold in a continuous casting apparatus, and in a continuous casting process, refined molten steel is continuously poured into the mold through the submerged entry nozzle after being treated by the tundish and subjected to cooling and solidification processes. 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.
Disclosure of Invention
An object of the utility model is to provide a continuous casting uses immersion nozzle with stationary flow structure to the problem that exists among the prior art, this mouth of a river improves on current basis, can effectively reduce the crystallizer liquid level undulant, can the effect of full play continuous casting.
The technical scheme of the utility model is that:
the utility model provides an immersion nozzle for continuous casting, includes mouth of a river body, mouth of a river body include from last to down the equal cross-section of last connecting portion, cylinder type that connect gradually 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 the limited entry hole of footpath portion inner wall, the entry hole extend to the bottom and the water conservancy diversion spacer block of first variable diameter portion and be connected, the water conservancy diversion spacer block on be provided with the stationary flow structure, entry hole exit be the trapezoidal form that falls, the stationary flow structure including set up in the stationary flow of the positive portion of water conservancy diversion spacer block erect the hole, erect the stationary flow branch hole that the hole is connected with the stationary flow.
Specifically, the diversion separation block is flat.
Specifically, the number of the flow stabilizing branch holes is at least four, and every two of the flow stabilizing branch holes are symmetrically and obliquely extended to the lower side part of the flow guide separating block.
Specifically, the outlet of the steady flow branch hole is arranged on the side edge of the lower part of the flow guide separation block.
Specifically, the diameter of the steady flow vertical hole is larger than that of the steady flow branch hole.
The utility model has the advantages that: the utility model is an improvement of the prior water gap, the bottom of the inlet hole is directly connected with the diversion separation block, the space between the inlet hole and the diversion separation block is removed, can reduce the impact of the molten steel entering from the inlet hole on the flow guide separation block, and is provided with a steady flow hole, the steady flow structure comprises a steady flow vertical hole arranged at the middle part of the flow guide separation block and a steady flow branch hole connected with the steady flow vertical hole, the steady flow vertical hole at the middle part is responsible for shunting part of the molten steel flowing out of the first diameter-changing part and flowing out of the disperser, the steady flow branch hole carries out steady flow according to the quantity of the molten steel and respectively flows into the molten steel at the outlet of the side where the steady flow branch hole is positioned, the steady flow structure has the functions of drainage and steady flow, the flow stabilizing structure can disperse the molten steel at the two sides of the flow guide separation block, and balances the water inflow quantity at the outlets at the two sides of the flow guide separation block, so that the phenomenon of liquid level fluctuation caused by large water inflow quantity can be further prevented. 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 sectional view of a submerged nozzle according to the present invention.
1 same diameter part, 2 first diameter-changing part, 3 inlet hole, 4 second diameter-changing part, 5 diversion separation block,
6 steady flow vertical holes and 7 steady flow branch holes.
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, the submerged nozzle for continuous casting comprises a nozzle body, the nozzle body comprises an upper connecting part, a cylindrical uniform-section same-diameter part 1, a first diameter-variable part 2 and a second diameter-variable part 4 which are sequentially connected from top to bottom, a flow guide separation block 5 is arranged in the second diameter-variable part 4, an inlet hole is limited by the inner wall of the same-diameter part 1, the inlet hole extends to the bottom of the first diameter-variable part 2 and is connected with the flow guide separation block 5, a flow stabilizing structure is arranged on the flow guide separation block 5, an outlet of the inlet hole 3 is in an inverted trapezoid shape, and 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 diversion separation block 5 is flat.
The number of the steady flow branch holes 7 is at least four, and every two steady flow branch holes are symmetrically inclined and extend to the lower side part of the flow guide separation block (5). The outlet of the steady flow branch hole 7 is arranged on the side edge of the lower part of the flow guide separation block (5). The diameter of the steady flow vertical hole 6 is larger than that of the steady flow branch hole 7.
The utility model discloses an improvement to current mouth of a river, with the bottom of inlet hole direct with the water conservancy diversion separation block be connected to set up stationary flow hole on the water conservancy diversion separation block, the stationary flow structure including set up in stationary flow vertical stroke hole 6, with the stationary flow vertical stroke hole 7 that hole 6 is connected of stationary flow vertical stroke in the middle part of water conservancy diversion separation block 5, the shape of water conservancy diversion separation block 5 be the platykurtic, through water conservancy diversion separation block 5 when the molten steel leaves from the inlet hole directly shunt it, the molten steel is shunted along stationary flow hole vertical stroke hole 6 inside the water conservancy diversion separation block 5 simultaneously, avoids the molten steel to be separated inhomogeneously by water conservancy diversion separation block 5, the condition of velocity of flow imbalance appears in mouth of a river exit, reduces the crystallizer liquid level and fluctuates, can even mouth of a river effluence, prevents being drawn into of protection sediment, the effect of ability 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 (5)
1. The utility model provides an immersion nozzle is used in continuous casting with stationary flow structure, includes the mouth of a river body, the mouth of a river body include from last connecting portion, the equal cross-section of cylinder type constant diameter portion (1), first variable diameter portion (2) and second variable diameter portion (4) that connect gradually down, second variable diameter portion (4) in set up water conservancy diversion separating block (5), with the limited entry hole of footpath (1) inner wall, its characterized in that, the bottom that the entry hole extends to first variable diameter portion (2) be connected with water conservancy diversion separating block (5), water conservancy diversion separating block (5) on be provided with the stationary flow structure, entry hole (3) exit be the shape of falling the ladder, the stationary flow structure including set up in the stationary flow vertical hole (6) of water conservancy diversion separating block (5) middle part, stationary flow branch hole (7) of being connected with stationary flow vertical hole (6).
2. The submerged entry nozzle for continuous casting with a flow stabilizing structure as claimed in claim 1, wherein the flow guiding separation block (5) is flat in shape.
3. The submerged entry nozzle with the flow stabilizing structure for continuous casting according to claim 1, characterized in that the flow stabilizing branch holes (7) are at least four and symmetrically inclined and extend to the lower side of the flow guiding separation block (5) in pairs.
4. The submerged entry nozzle with the flow stabilizing structure for continuous casting according to claim 1, characterized in that the outlet of the flow stabilizing branch hole (7) is arranged at the lower side of the flow guiding separation block (5).
5. The submerged entry nozzle for continuous casting with flow stabilizing structure as claimed in claim 1, characterized in that the diameter of said flow stabilizing vertical hole (6) is larger than the diameter of said flow stabilizing branch hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627848.7U CN217121735U (en) | 2022-03-21 | 2022-03-21 | Immersion nozzle with steady flow structure for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627848.7U CN217121735U (en) | 2022-03-21 | 2022-03-21 | Immersion nozzle with steady flow structure for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217121735U true CN217121735U (en) | 2022-08-05 |
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ID=82644877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220627848.7U Active CN217121735U (en) | 2022-03-21 | 2022-03-21 | Immersion nozzle with steady flow structure for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217121735U (en) |
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2022
- 2022-03-21 CN CN202220627848.7U patent/CN217121735U/en active Active
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