CN201776412U - Immersed nozzle for inhibiting flow deviation - Google Patents
Immersed nozzle for inhibiting flow deviation Download PDFInfo
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- CN201776412U CN201776412U CN2010202874286U CN201020287428U CN201776412U CN 201776412 U CN201776412 U CN 201776412U CN 2010202874286 U CN2010202874286 U CN 2010202874286U CN 201020287428 U CN201020287428 U CN 201020287428U CN 201776412 U CN201776412 U CN 201776412U
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- damping
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- molten steel
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Abstract
The utility model relates to an immersed nozzle for inhibiting flow deviation. The immersed nozzle body is in a cylindrical structure, a steel flow channel is arranged inside the nozzle body, and both sides of the bottom of the nozzle are symmetrically provided with spitting holes. The immersed nozzle is characterized in that two steel flow damping blades are symmetrically arranged on the nozzle body between the two spitting holes, and damping holes are arranged on the damping blades. In a word, the utility model can effectively control the flowing state of liquid steel on a free liquid level in liquid steel continuous casting process by arranging the damping blades, inhibit the flow deviation of liquid steel near the free liquid level, effectively control the production of vortexes and protect slag from the entrainment, purify the liquid steel, homogenize the temperature field of liquid steel in a crystallizer and improve the final quality of casting blanks.
Description
Technical field
The utility model relates to continuous casting installation for casting, particularly a kind of submersed nozzle that suppresses bias current.
Background technology
The crystallizer submersed nozzle is one of the totally-enclosed protection casting process of molten steel key equipment; sheet billet continuous casting mainly is the both sides pass with the submersed nozzle structure at present; steel flow in the tundish is divided into two strands of steel streams and enters in the crystallizer through immersing the hole that spues, the mouth of a river; because it is the static pressure of molten steel stream burst impulsive force and flow velocity are very big, very big to the volume slag influence that molten steel in mold flows and free surface fluctuation causes.
The structure of submersed nozzle is vital to the influence of molten steel in mold flow regime, the anti-whirlpool metering nozzle that Chinese patent 00259317.3 proposes, adopt the design of horn mouth infundibulate inner chamber, produce by the bias current of having only key-way shape or corrugated male and fomale(M﹠F) to prevent to spue the hole at the horn mouth inwall; The disclosed mouth of a river of Japan Patent JP3226340 is to connect three barricades of a U type to guide to steel and flow to into crystallizer in cylindrical shell bottom, the mouth of a river, improves the crystallizer flow field; The disclosed mouth of a river of Japan Patent JP2280949 is mainly used in circular-arc type continuous casting machine, by adjusting tapping orifice angle deflection outer arc side, reduces the probability that field trash is caught by the inner arc solidification front; Chinese patent 200520046135.8 disclosed submersed nozzles are both sides tappings, and every side has the tapping hole of upper and lower two angle of declinations, reduces the impulsive force to the casting blank solidification forward position; Japan Patent JP2205239 is rolled into covering slag in the molten steel by the whirlpool that suppresses molten steel surface formation at the tapping hole ring-like convex of upper end increase.
At present; disclosed patent mainly is to improve molten steel by type structure in the change submersed nozzle to go out stream stream thigh; and then improve flowing of molten steel in mold; but submersed nozzle field trash after cast after a while is unavoidable in inside, mouth of a river dross; the type structure has not existed yet in the mouth of a river, and dross can cause that also side opening stream thigh goes out the inhomogeneous of stream, causes the bias current in the crystallizer; cause whirlpool on the molten steel surface, be involved in air and covering slag.
The utility model content
At the deficiencies in the prior art; the purpose of this utility model is to provide a kind of submersed nozzle that suppresses bias current; realization control effectively near the molten steel flow regime free surface in the continuous casting of molten steel process; suppress near the generation of the bias current of the molten steel of free surface, suppress the generation of whirlpool and being involved in of covering slag.
For achieving the above object, the technical solution of the utility model is:
A kind of submersed nozzle that suppresses bias current, the submersed nozzle body is columnar structured, mouth of a river body interior is provided with the steel circulation road, mouth of a river two bottom sides symmetry has the hole that spues, it is characterized in that, be arranged with two steel flow damping blades on described two mouth of a river bodies that spue between the hole, damping vane is provided with damping hole.
Further, described steel flow damping axis of runner blade becomes 90 degree with the axially bored line that spues.
Again, the damping hole on the described steel flow damping blade is irregular distribution.
Compare with existing submersed nozzle, advantage of the present utility model is:
1, realize free surface place molten steel flow regime in the continuous casting of molten steel process is effectively controlled, the bias current that suppresses near the molten steel of free surface produces, and suppresses the generation of whirlpool and being involved in of covering slag, makes the inclusion defect amount of final strand reduce by 10%.
2, molten steel passes through in the damping vane damping hole back and forth near the liquid level, and the blade damping hole not only can effectively reduce near the liquid level molten steel flow speed 15% the mouth of a river, can also adsorb the field trash in the molten steel, reaches the purpose of cleaning molten steel.
3, can effectively control liquid level annex molten steel flow, refluxing in the upper end that forms two bursts of symmetries on both sides, the mouth of a river, makes the temperature of molten steel more even, helps the growth of crystal grain, improves the final mass of strand.
The utility model is as one of vitals of sheet billet continuous casting, and near the effective MOLTEN STEEL FLOW state crystallization control device liquid level in casting cycle improves the strand final mass, will be applied to widely in the production process of sheet billet continuous casting.
Description of drawings
Fig. 1 be the utility model one embodiment structural representation;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1.
The specific embodiment
Referring to Fig. 1～Fig. 3, the submersed nozzle of inhibition bias current of the present utility model, submersed nozzle body 1 is columnar structured, mouth of a river body interior is provided with steel circulation road 101, mouth of a river two bottom sides symmetry has the hole 102,103 that spues, be arranged with two steel flow damping blades 2,3 on described two mouth of a river bodies that spue between the hole 102,103, the damping vane axis becomes 90 degree with the axially bored line that spues; Damping vane 2,3 is provided with damping hole 21,31, and damping hole is irregular distribution.
The flow through hole that spues of submersed nozzle of molten steel enters in the crystallizer, after stream strand impacts mould at narrow, is divided into two bursts of backflows up and down.
Because two holes that spue about submersed nozzle has, two stream thighs cross at crystallizer center submersed nozzle damping vane place about the upper end, the stream stock does not impact at the two ends, the left and right sides of damping vane and changes direction down, refluxes in two upper ends that can form symmetry.Certainly the bias current of crystallizer is inevasible; when the submersed nozzle bias current exists; as the velocity ratio that impacts the damping vane left side is when big; a stream burst a part of molten steel change in the left side is directed downwards; another part molten steel will (damping hole not only has the function of damping brake to the molten steel that passes through by the irregular aperture on the damping vane; and can adsorb being mingled with in the molten steel); enter into the crystallizer right side; because left side flow enters the overdamp hole and has been broken up; evenly mix with right side flow; right side flow is just played the effect of a braking, and can not intersect convection current and form whirlpool, cause being involved in of air and covering slag with right side flow formation.So damping vane can effectively be controlled near the MOLTEN STEEL FLOW state liquid level, and can cleaning molten steel, the strand final mass is improved in liquid steel temperature field in the homogeneously crystallized device.
In sum; the utility model is by being provided with damping vane; can realize free surface place molten steel flow regime in the continuous casting of molten steel process is effectively controlled; the bias current that suppresses near the molten steel of free surface produces; effectively control generation of whirlpool and being involved in of covering slag; and can cleaning molten steel, the strand final mass is improved in liquid steel temperature field in the homogeneously crystallized device.
Claims (3)
1. submersed nozzle that suppresses bias current, the submersed nozzle body is columnar structured, mouth of a river body interior is provided with the steel circulation road, mouth of a river two bottom sides symmetry has the hole that spues, it is characterized in that, be arranged with two steel flow damping blades on described two mouth of a river bodies that spue between the hole, damping vane is provided with damping hole.
2. the submersed nozzle of inhibition bias current as claimed in claim 1 is characterized in that, described steel flow damping axis of runner blade becomes 90 degree with the axially bored line that spues.
3. the submersed nozzle of inhibition bias current as claimed in claim 1 is characterized in that, the damping hole on the described steel flow damping blade is irregular distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202874286U CN201776412U (en) | 2010-08-10 | 2010-08-10 | Immersed nozzle for inhibiting flow deviation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202874286U CN201776412U (en) | 2010-08-10 | 2010-08-10 | Immersed nozzle for inhibiting flow deviation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201776412U true CN201776412U (en) | 2011-03-30 |
Family
ID=43789645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202874286U Expired - Lifetime CN201776412U (en) | 2010-08-10 | 2010-08-10 | Immersed nozzle for inhibiting flow deviation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201776412U (en) |
-
2010
- 2010-08-10 CN CN2010202874286U patent/CN201776412U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |
|
| CX01 | Expiry of patent term |