CN104120216B - A kind of shower nozzle of RH vacuum refining top gun - Google Patents
A kind of shower nozzle of RH vacuum refining top gun Download PDFInfo
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- CN104120216B CN104120216B CN201410387637.0A CN201410387637A CN104120216B CN 104120216 B CN104120216 B CN 104120216B CN 201410387637 A CN201410387637 A CN 201410387637A CN 104120216 B CN104120216 B CN 104120216B
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Abstract
The invention discloses a kind of shower nozzle of RH vacuum refining top gun, comprise convergent-divergent channel and be coaxially arranged on the core pipe in convergent-divergent channel, between convergent-divergent channel and core pipe, form annular constrictions pipeline section and annular expansion pipeline section.In the present invention, annular constrictions pipeline section and annular expansion pipe segment structure can make Oxygen Flow spray into vacuum chamber with ultrasonic speed, therefore work rifle position can be improved, reduce splashing molten steel and glue rifle, reduce shower nozzle consumption of cooling-water, and annular aditus laryngis can more circular than existing top lance spray nozzle aditus laryngis be more effective prevents stifled rifle, the shower nozzle life-span is longer; And annular aditus laryngis keeping, under the condition that oxygen pressure is identical with traditional RH equipment for vacuum refining, increasing oxygen blast flow, can improve oxygen decarburization and the efficiency of blowing oxygen by adding aluminum intensification; Because its convergent-divergent channel, core pipe and syndeton are between the two all comparatively simple, compared with existing top lance spray nozzle, it is without the need to adopting precision casting, and manufacture difficulty is obviously reduced.
Description
Technical field
The present invention relates to the vacuum degasser for external refining in a kind of metallurgy industry, particularly the shower nozzle of a kind of RH vacuum refinement top rifle.
Background technology
Molten steel vacuum circulation degassing (RH) technology is a kind of steel secondary refining technique, is the external refining means of producing high quality variety steel indispensability.RH vacuum refining device is at first for liquid steel degassing, its metallurgy principle relies on pressure reduction that molten steel is promoted to vacuum chamber, and make Circulating Flow of Molten Steel by blowing argon gas, utilize vacuum environment to reach the object of degassed (N2, H2, O2), its advantage is that speed of response is fast, vacuum tightness is high, metallurgical effect is good.In recent years, KTB (KawasakiTopBlowing) the overhead oxygen rifle developed by Kawasaki company, RH vacuum refinement is possessed, and the greater functionality such as decarburization, CO secondary combustion heating is forced in efficient oxygen blast, and RH technology is more widely used.
But no matter be that RH-KTB pushes up rifle, or the RH-MFB of exploitation later pushes up rifle, RH-MESID pushes up rifle, RH-PB pushes up rifle and Chinese patent 200420027046.4, 200610076151.0, 200820174977.5, 200820174973.7, 200820174973.7, 201110000083.0, 201210346652.1, 201310431081.6 involved top rifle or shower nozzle, its convergent-divergent channel is generally in central position, blast tube is distributed in outside convergent-divergent channel, indivedual rifle head blast tube is in central position, and convergent-divergent channel adopts the external tilt distribution of porous, all there is manufacture difficulty large, work-ing life is low, oxygen blast limited flow, easily the shortcomings such as rifle are blocked up in using.
Summary of the invention
In view of this, the object of this invention is to provide a kind of shower nozzle of RH vacuum refining top gun, high with the manufacture difficulty overcoming the existence of existing top lance spray nozzle, easily stifled rifle, the shortcomings such as work-ing life is low.
The shower nozzle of RH vacuum refining top gun of the present invention, comprise convergent-divergent channel and be coaxially arranged on the core pipe in convergent-divergent channel, form annular constrictions pipeline section that cross section diminishes vertically gradually between described convergent-divergent channel and core pipe and cross section becomes large annular expansion pipeline section vertically gradually, the connection section of described annular constrictions pipeline section and annular expansion pipeline section is annular aditus laryngis.
Further, the inwall of described core pipe is provided with the first sealing-ring and annular groove is installed.
Further, the rear end external cylindrical surface of described convergent-divergent channel is provided with the second sealing-ring mounting groove.
Further, the front end of described convergent-divergent channel is formed with the annular tube shaped joint with the bending of pipe rear end outside pipe.
Further, the outer tube wall of described core pipe is provided with bearing rib, and the inner tubal wall of described bearing rib and convergent-divergent channel is welded to connect.
Beneficial effect of the present invention:
1, the shower nozzle of RH vacuum refining top gun of the present invention, the annular constrictions pipeline section formed between its convergent-divergent channel and core pipe and annular expansion pipe segment structure can make Oxygen Flow spray into vacuum chamber with ultrasonic speed, what connect annular collapsible tube section and annular expansion pipeline section is ring-type aditus laryngis (aditus laryngis refers to that gas velocity reaches the pipeline smallest cross-sectional place of velocity of sound), thus can keep under the condition that oxygen pressure is identical with traditional RH equipment for vacuum refining, increase oxygen blast flow, improve oxygen decarburization and the efficiency of blowing oxygen by adding aluminum intensification.
2, the shower nozzle of RH vacuum refining top gun of the present invention, because it can make Oxygen Flow spray into vacuum chamber with hypersonic velocity, therefore it can improve work rifle position, reduce splashing molten steel and glue rifle, reduce shower nozzle consumption of cooling-water, and annular aditus laryngis can more circular than existing top lance spray nozzle aditus laryngis be more effective prevents stifled rifle, the shower nozzle life-span is longer.
3, the shower nozzle of RH vacuum refining top gun of the present invention, its convergent-divergent channel, core pipe and syndeton are between the two all comparatively simple, and compared with existing top lance spray nozzle, it is without the need to adopting precision casting, and manufacture difficulty is obviously reduced.
Accompanying drawing explanation
Fig. 1 is the perspective cross-sectional structural representation of shower nozzle of the present invention;
Fig. 2 is the overall sectional structure schematic diagram adopting the RH vacuum refining top gun of shower nozzle of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in the figure, the shower nozzle of the present embodiment RH vacuum refining top gun, comprise convergent-divergent channel 1 and be coaxially arranged on the core pipe 2 in convergent-divergent channel 1, form annular constrictions pipeline section 3 that cross section diminishes vertically gradually between described convergent-divergent channel 1 and core pipe 2 and cross section becomes large annular expansion pipeline section 4 vertically gradually, the connection section of described annular constrictions pipeline section 3 and annular expansion pipeline section 4 is annular aditus laryngis 5.
In a particular embodiment, the rear end of convergent-divergent channel 1 connects pipe 6 in the rifle of top, and the front end of convergent-divergent channel 1 connects top rifle outer tube 7, arranges and push up rifle marine riser 8 in the rifle of top between pipe 6 and top rifle outer tube 6, the connection top rifle pipe core 9 of core pipe 2, arranges top rifle duff pipe 10 in top rifle pipe core 3.
Due between convergent-divergent channel 1 and core pipe 2 formed annular constrictions pipeline section 3 and annular expansion pipeline section 4 structure Oxygen Flow can be made to spray into vacuum chamber with ultrasonic speed, and annular aditus laryngis can keep under the condition that oxygen pressure is identical with traditional RH equipment for vacuum refining, increase oxygen blast flow, improve oxygen decarburization and the efficiency of blowing oxygen by adding aluminum intensification.
And because it can make Oxygen Flow spray into vacuum chamber with hypersonic velocity, therefore adopt this shower nozzle can improve work rifle position, reduce splashing molten steel and glue rifle, reduce shower nozzle consumption of cooling-water, and annular aditus laryngis 5 can more circular than existing top lance spray nozzle aditus laryngis be more effective prevents stifled rifle, therefore the shower nozzle life-span is longer.
Further, because convergent-divergent channel 1, core pipe 2 and syndeton are between the two all comparatively simple, compared with existing top lance spray nozzle, it is without the need to adopting precision casting, and manufacture difficulty is obviously reduced.
In the present embodiment, the inwall of described core pipe 2 is provided with the first sealing-ring and annular groove 11 is installed, top rifle pipe core 9 and core pipe 2 socket connection, and sealed by O RunddichtringO; The rear end external cylindrical surface of described convergent-divergent channel 1 is provided with the second sealing-ring mounting groove 12, the rear end socket connection of pipe 6 and convergent-divergent channel 1 in the rifle of top, and is sealed by O RunddichtringO; The front end of described convergent-divergent channel 1 is formed with the annular tube shaped joint 13 with the bending of pipe rear end outside pipe, and top rifle outer tube 7 and annular tube shaped joint 13 are welded to connect; Because nozzle structure is simple, and syndeton between shower nozzle and each transfer lime of top rifle is also simple, and only have one weld seam, all the other be grafting, and therefore the manufacture difficulty of shower nozzle and top rifle entirety all shows and greatly reduces for prior art.
In the present embodiment, the outer tube wall of described core pipe 2 is provided with bearing rib 14, the inner tubal wall of described bearing rib 14 and convergent-divergent channel 1 is welded to connect, and manufactures simple, easily realizes.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. the shower nozzle of a RH vacuum refining top gun, it is characterized in that: comprise convergent-divergent channel and core pipe, described core pipe is coaxially arranged in convergent-divergent channel, form annular constrictions pipeline section that cross section diminishes vertically gradually between described convergent-divergent channel and core pipe and cross section becomes large annular expansion pipeline section vertically gradually, the connection section of described annular constrictions pipeline section and annular expansion pipeline section is annular aditus laryngis.
2. the shower nozzle of RH vacuum refining top gun according to claim 1, is characterized in that: the inwall of described core pipe is provided with the first sealing-ring and installs annular groove.
3. the shower nozzle of RH vacuum refining top gun according to claim 1, is characterized in that: the rear end external cylindrical surface of described convergent-divergent channel is provided with the second sealing-ring mounting groove.
4. the shower nozzle of RH vacuum refining top gun according to claim 1, is characterized in that: the front end of described convergent-divergent channel is formed with the annular tube shaped joint with the bending of pipe rear end outside pipe.
5., according to the shower nozzle of described RH vacuum refining top gun arbitrary in claim 1-4, it is characterized in that: the outer tube wall of described core pipe is provided with bearing rib, and the inner tubal wall of described bearing rib and convergent-divergent channel is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410387637.0A CN104120216B (en) | 2014-08-07 | 2014-08-07 | A kind of shower nozzle of RH vacuum refining top gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410387637.0A CN104120216B (en) | 2014-08-07 | 2014-08-07 | A kind of shower nozzle of RH vacuum refining top gun |
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| Publication Number | Publication Date |
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| CN104120216A CN104120216A (en) | 2014-10-29 |
| CN104120216B true CN104120216B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410387637.0A Active CN104120216B (en) | 2014-08-07 | 2014-08-07 | A kind of shower nozzle of RH vacuum refining top gun |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109881025B (en) * | 2019-03-13 | 2020-11-17 | 上海交通大学 | Supersonic degassing device and method for aluminum melt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312052A (en) * | 2011-10-18 | 2012-01-11 | 马钢(集团)控股有限公司 | Flat single-tube vacuum refining device |
| CN203976853U (en) * | 2014-08-07 | 2014-12-03 | 中冶赛迪上海工程技术有限公司 | A kind of shower nozzle of RH vacuum refining top gun |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4466287B2 (en) * | 2004-08-31 | 2010-05-26 | Ｊｆｅスチール株式会社 | Method of refining molten steel under reduced pressure and top blowing lance for refining |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312052A (en) * | 2011-10-18 | 2012-01-11 | 马钢(集团)控股有限公司 | Flat single-tube vacuum refining device |
| CN203976853U (en) * | 2014-08-07 | 2014-12-03 | 中冶赛迪上海工程技术有限公司 | A kind of shower nozzle of RH vacuum refining top gun |
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| CN104120216A (en) | 2014-10-29 |
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