CN2390720Y - Reducing internal thread immerse pouring head - Google Patents
Reducing internal thread immerse pouring head Download PDFInfo
- Publication number
- CN2390720Y CN2390720Y CN 99248619 CN99248619U CN2390720Y CN 2390720 Y CN2390720 Y CN 2390720Y CN 99248619 CN99248619 CN 99248619 CN 99248619 U CN99248619 U CN 99248619U CN 2390720 Y CN2390720 Y CN 2390720Y
- Authority
- CN
- China
- Prior art keywords
- internal thread
- river
- reducing internal
- mouth
- water gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a reducing internal thread immersion water gap, which belongs to an auxiliary device of continuous casting. The reducing internal thread immersion water gap is an integral structure. The utility model is characterized in that the conical table-shaped internal wall of the reducing internal thread immersion water gap is distributed with one to five cylindrical concave tables from top to bottom; the diameter of the cylindrical concave tables is 10 to 20 millimeters larger than the internal diameter of the reducing internal thread immersion water gap, and the diameter of the cylindrical concave tables can gradually diminish from top to bottom. The external side of the occupied position of the cylindrical concave tables in the internal surface of the reducing internal thread immersion water gap is provided with a concave screw or a convex screw of internal rotation; the depth or the height of the screw is 3 to 6 millimeters; the screw pitch is 15 to 50 millimeters, and the spiral angle is 10 DEG to 30 DEG. The reducing internal thread immersion water gap of the utility model has the advantages of bias current prevention, plugging prevention, improved quality of casting blank, etc.
Description
The utility model belongs to the servicing unit of continuous casting steel machine, is mainly used in the steel class that contains certain sour molten aluminium in casting slab and the molten steel.
In the continuous casting steel billet process; the ladle canal of the submersed nozzle of tradition usefulness is straight tubular; two from lower end side openings of molten steel flow out; because molten steel is relevant with the pans incoming flow in mouth of a river bias current in the steel pouring process; molten steel can not be full of endoporus; when so molten steel flows out from two side openings; big, the little phenomenon of an effluent of one effluent will appear; be commonly called as bias current; because bias current will make the interior heat flux distribution of crystallizer inhomogeneous; thereby impel the inhomogeneous of base shell solidified layer thickness, and may make the top covering slag fusing non-uniform phenomenon occur.
At the reported in literature one technicism collected works (Shinagawa Technical ReportVol.40.1997 P83-96) of Japanese submersed nozzle, the combination of two kinds of different-diameters is adopted in submersed nozzle internal channel aperture, can prevent bias current.Yet this submersed nozzle do not have the steel conductance to, when molten steel entered mouth of a river passage from pans, because the gravity effect, molten steel was kept straight on from top to down, and molten steel is not full of in endoporus, thereby molten steel still the bias current phenomenon might occur when side opening flows out.
The purpose of this utility model is to provide the anticlogging reducing internal thread of a kind of anti-bias current submersed nozzle.
Based on above-mentioned purpose, the utility model submersed nozzle, be overall structure, described submersed nozzle inner surface configuration is a garden frustum type, described mouth of a river internal diameter diminishes from top to bottom gradually, it is characterized in that: described mouth of a river inner surface is distributed with 1-5 garden post concave station from top to bottom, the diameter of described garden post concave station is than the big 10-20mm of described mouth of a river internal diameter, and its diameter diminishes from top to bottom gradually, the spacing of described garden post concave station diminishes from top to bottom gradually, outside the position that garden post concave station occupies in the inner surface of the described mouth of a river, design has inward turning spill or convex screw thread, the degree of depth of described screw thread or highly be 3-6mm, the pitch of described screw thread is 15-50mm, 10 °-30 ° of the helical angles of described screw thread.
Compared with prior art, advantage of the present utility model is:
(1) prevents the molten steel bias current, prevent mouth of a river narrow diameter obstruction.
The utility model mouth of a river ladle canal changes garden frustum type+garden column base type into by traditional garden frustum type, adopts two or more different-diameters to be combined into mouth of a river channel diameter.And mouth of a river internal channel wall is carved with inward turning spill or convex screw thread, and when molten steel therefrom flow through, molten steel spiraled and descends along inwall, so molten steel is when being downward through, and molten steel will be covered with mouth of a river inwall, and reach large diameter position, and MOLTEN STEEL FLOW speed slows down, Al in the steel
2O
3Field trash will deposit herein, because mouth of a river diameter is big herein, and Al
2O
3The deposition that is mingled with can not reduce the area of central steel aquaporin, so mouth of a river narrow diameter clogging can not take place.Molten steel spirals along mouth of a river inwall and flows down in addition, is full of mouth of a river passage, so molten steel bias current phenomenon can not take place when flowing out from the exit, both sides molten steel.
(2) improve slab quality
Because molten steel flows along helical in the mouth of a river, institute flows through distance and prolongs relatively, helps the molten steel cooling, thereby reduces molten steel overheat, helps casting process and improves slab quality.
In the use, consider that the inner local diameter in the mouth of a river enlarges after, local mouth of a river wall thickness attenuate is to the mouth of a river influence in service life.Mouth of a river internal diameter with molten steel face and covering slag touching position in mouth of a river insertion crystallizer should be designed to the less position of internal diameter, the service life (the etch amount of protected slag) at the maintenance mouth of a river and traditional submersed nozzle there to be equal service life.
The utility model is described in further detail for following structure accompanying drawing.
Fig. 1 is the structural representation of the utility model submersed nozzle.
Among Fig. 1,1 is the utility model mouth of a river, and 2 is garden post concave station, and 3 is the screw thread on the inwall of the mouth of a river, and 4 is mouth of a river ladle canal, 5 molten steel delivery ports.
Claims (1)
1, a kind of reducing internal thread submersed nozzle, be overall structure, described submersed nozzle inner surface configuration is a garden frustum type, described mouth of a river internal diameter diminishes from top to bottom gradually, it is characterized in that: described mouth of a river inner surface is distributed with 1-5 garden post concave station from top to bottom, the diameter of described garden post concave station is than the big 10-20mm of described mouth of a river internal diameter, and its diameter diminishes from top to bottom gradually, the spacing of described garden post concave station diminishes from top to bottom gradually, outside the position that garden post concave station occupies in the inner surface of the described mouth of a river, design has inward turning spill or convex screw thread, the degree of depth of described screw thread or highly be 3-6mm, the pitch of described screw thread is 15-50mm, 10 °-30 ° of the helical angles of described screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99248619 CN2390720Y (en) | 1999-09-29 | 1999-09-29 | Reducing internal thread immerse pouring head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99248619 CN2390720Y (en) | 1999-09-29 | 1999-09-29 | Reducing internal thread immerse pouring head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2390720Y true CN2390720Y (en) | 2000-08-09 |
Family
ID=34033759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99248619 Expired - Fee Related CN2390720Y (en) | 1999-09-29 | 1999-09-29 | Reducing internal thread immerse pouring head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2390720Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327989C (en) * | 2002-07-31 | 2007-07-25 | 品川白炼瓦株式会社 | Casting nozzle |
| CN101189088B (en) * | 2005-05-02 | 2010-05-19 | 朝鲜耐火株式会社 | Submerged entry nozzle for continuous casting |
| CN110918918A (en) * | 2019-12-05 | 2020-03-27 | 天津钢铁集团有限公司 | Process method for controlling center carbon segregation of bearing steel casting blank |
| CN116745047A (en) * | 2021-04-15 | 2023-09-12 | 品川耐火材料株式会社 | Immersion nozzle for continuous casting |
-
1999
- 1999-09-29 CN CN 99248619 patent/CN2390720Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327989C (en) * | 2002-07-31 | 2007-07-25 | 品川白炼瓦株式会社 | Casting nozzle |
| CN101189088B (en) * | 2005-05-02 | 2010-05-19 | 朝鲜耐火株式会社 | Submerged entry nozzle for continuous casting |
| CN110918918A (en) * | 2019-12-05 | 2020-03-27 | 天津钢铁集团有限公司 | Process method for controlling center carbon segregation of bearing steel casting blank |
| CN116745047A (en) * | 2021-04-15 | 2023-09-12 | 品川耐火材料株式会社 | Immersion nozzle for continuous casting |
| CN116745047B (en) * | 2021-04-15 | 2024-03-22 | 品川耐火材料株式会社 | Immersion nozzle for continuous casting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |