CN202039085U - Combination welding porous standard Laval oxygen gun nozzle - Google Patents
Combination welding porous standard Laval oxygen gun nozzle Download PDFInfo
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- CN202039085U CN202039085U CN2011201054941U CN201120105494U CN202039085U CN 202039085 U CN202039085 U CN 202039085U CN 2011201054941 U CN2011201054941 U CN 2011201054941U CN 201120105494 U CN201120105494 U CN 201120105494U CN 202039085 U CN202039085 U CN 202039085U
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Abstract
The utility model relates to a combination welding porous standard Laval oxygen gun nozzle which comprises an oxygen inlet pipe, a Laval spray pipe, a crown, a water guide plate, a water inlet pipe, a water return pipe and an oxygen disc. The combination welding porous standard Laval oxygen gun nozzle is characterized in that a current stabilization section is arranged between the oxygen inlet pipe and the Laval spray pipe. A gradually expanding section of the Laval spray pipe and the crown are connected by a thread, and a three-layer seal combination mode of inner-side soldering and outer-side argon arc welding is adopted at the joint of the the Laval spray pipe and the crown. The water inlet pipe, the water return pipe and the water guide pipe form a streamline cooling water channel. The water guide plate is formed by punching, and is connected and fixed with the oxygen disc through a stud and a nut. Compared with the prior art, the combination welding porous standard Laval oxygen gun nozzle has the benefits that the seepage an be effectively prevented, the cooling water circulation is improved, and the service life is prolonged; and the smelting time is shortened, and the production cost is reduced.
Description
Technical field
The utility model relates to a kind of converter steelmaking oxygen lance blow head, is a kind of combined and welded porous standard Laval oxygen lance blow head.
Background technology
The oxygen rifle is the key equipment of steel-making converter, and oxygen lance blow head is an oxygen rifle most important component, and the structure of oxygen lance blow head and the pass of jet pipe have directly determined the speed of oxygen jet, has also determined the time and the oxygen-consumption of steel-making.The speed of oxygen jet is fast more, and is strong more to the surging force and the penetration power in molten bath, also just accelerates the speed of steel fusing, shortens the heat.
At present, the oxygen lance blow head of iron and steel enterprise's coverter pig is the simple and easy De Laval noz(zle) type of porous, adopts fine copper to forge half casting combination making form through monoblock casting, half.Owing to be subjected to the restriction of fine copper casting technique, defectives such as the easy generation of cast part is loose, slag inclusion, and body of casting wall thickness is heavier.This not only increases production cost, and has reduced the cooling useful area of shower nozzle, reduces shower nozzle pileum cooling performance, has shortened shower nozzle work-ing life.Simple and easy De Laval noz(zle) is processed corner angle and the coarse surface that is produced, and can increase the thickness of boundary layer, reduces the flow of oxygen, makes oxygen pressure can not change into the kinetic energy of oxygen fully.In recent years, combined and welded oxygen lance blow head occurred, it adopts different materials according to the characteristics of shower nozzle, and pileum, jet pipe and oxygen tray adopt fine copper, and all the other parts of oxygen tray adopt carbon steel, have saved fine copper, have reduced cost.The corner angle that processing produced of jet pipe improve, and coarse surface obtains refinement.But in jet pipe and pileum weld easy to leak, the work-ing life of having reduced shower nozzle.Oxygen flows to the turbulent flow that the multithread jet pipe produces from the single current feeding oxygen tube, has a strong impact on jet speed.The nozzle throat diameter is the twice of throat diameter by the traditional method inlet diameter, the not science of choosing also of this size, and throat diameter is too small relatively, and the oxygen amount does not reach maximization, so still there is defective.
Summary of the invention
The purpose of this utility model provides a kind of combined and welded porous standard Laval oxygen lance blow head, can effectively prevent the seepage of shower nozzle, has improved cooling water circulationly, has prolonged work-ing life of shower nozzle; Shorten tap to tap time, reduced production cost.
For achieving the above object, the utility model is achieved through the following technical solutions:
Combined and welded porous standard Laval oxygen lance blow head comprises feeding oxygen tube, De Laval noz(zle), pileum, guide water board, water inlet pipe, return water pipe, oxygen tray, it is characterized in that, is provided with steady flow segment between feeding oxygen tube and De Laval noz(zle).The throat diameter d of described De Laval noz(zle) and the relational expression of oxygen tray inside diameter D are
Wherein n is a De Laval noz(zle) quantity.
The divergent segment of described De Laval noz(zle) adopts with pileum and is threaded, the inboard soldering in junction, the three-layer sealed bonded mode of outside argon arc welding.
Described water inlet pipe, return water pipe and guide water board form streamlined cooling-water duct.
Described guide water board impact briquetting is connected and fixed by double-screw bolt, nut and oxygen tray.
Compared with prior art, the beneficial effects of the utility model are:
1) prevents the seepage of oxygen lance blow head pileum, improved the circulation of water coolant, prolonged the work-ing life of shower nozzle.
2) the jet pipe determining dimensions has changed traditional nozzle throat method of calculation, chooses with the science method of calculation to help the oxygen flow maximized size.It is that the ingress diameter is about the twice of throat diameter that tradition nozzle throat diameter is chosen, this suitable single hole De Laval noz(zle), and for the porous De Laval noz(zle), this choosing is extremely unscientific, ignored between single hole feeding oxygen tube and the multihole nozzle to concern.The utility model has provided the relational expression of multihole nozzle throat diameter d and oxygen tray inside diameter D.
3) make that oxygen pressure changes into the kinetic energy of oxygen jet completely effectively in the oxygen lance blow head, and make the speed of oxygen jet reach maximum supersonic speed.Improve the stirring capacity of molten steel, shortened tap to tap time, reduced production cost.
4) improve flowing of oxygen, increased oxygen-supplying amount, strengthened the length of oxygen flow.Can raise the height of oxygen lance blow head like this, reduce oxygen lance blow head dry slag probability.
5) nickel dam in the standard De Laval noz(zle) has good abrasion resistance, has improved the rinse capability of anti-high oxygen flow, and pass is constant for a long time, guarantees that oxygen flow is stable for a long time.
Description of drawings
Fig. 1 is the structural representation of combined and welded porous standard Laval oxygen lance blow head.
Among the figure: 1-pileum 2-guide water board 3-standard De Laval noz(zle) 4-oxygen tray 5-return water pipe 6-water inlet pipe 7-feeding oxygen tube 8-double-screw bolt 9-nut 10-steady flow segment
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail.
See Fig. 1, combined and welded porous standard Laval oxygen lance blow head, comprise feeding oxygen tube 7, standard De Laval noz(zle) 3, pileum 1, guide water board 2, water inlet pipe 6, return water pipe 6, oxygen tray 4, be provided with steady flow segment 10 between feeding oxygen tube 7 and standard De Laval noz(zle) 3, the throat diameter d of De Laval noz(zle) and the relational expression of oxygen tray inside diameter D are
Wherein n is a De Laval noz(zle) quantity.
In oxygen tray 4, be provided with a plurality of steady flow segments 10, make the oxygen current stabilization enter De Laval noz(zle) 3, can make oxygen jet speed reach maximum supersonic speed.
The divergent segment of De Laval noz(zle) 3 adopts with pileum 1 and is threaded, the inboard soldering in junction, the three-layer sealed bonded mode of outside argon arc welding.Can effectively prevent the seepage of shower nozzle, improve the work-ing life of shower nozzle.
Claims (5)
1. combined and welded porous standard Laval oxygen lance blow head comprises feeding oxygen tube, De Laval noz(zle), pileum, guide water board, water inlet pipe, return water pipe, oxygen tray, it is characterized in that, is provided with steady flow segment between feeding oxygen tube and De Laval noz(zle).
2. combined and welded porous standard Laval oxygen lance blow head according to claim 1 is characterized in that the throat diameter d of described De Laval noz(zle) and the relational expression of oxygen tray inside diameter D are
Wherein n is a De Laval noz(zle) quantity.
3. combined and welded porous standard Laval oxygen lance blow head according to claim 1 is characterized in that, the divergent segment of described De Laval noz(zle) adopts with pileum and is threaded, the inboard soldering in junction, the three-layer sealed bonded mode of outside argon arc welding.
4. combined and welded porous standard Laval oxygen lance blow head according to claim 1 is characterized in that described water inlet pipe, return water pipe and guide water board form streamlined cooling-water duct.
5. combined and welded porous standard Laval oxygen lance blow head according to claim 1 is characterized in that described guide water board impact briquetting is connected and fixed by double-screw bolt, nut and oxygen tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201054941U CN202039085U (en) | 2011-04-12 | 2011-04-12 | Combination welding porous standard Laval oxygen gun nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201054941U CN202039085U (en) | 2011-04-12 | 2011-04-12 | Combination welding porous standard Laval oxygen gun nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202039085U true CN202039085U (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201054941U Expired - Fee Related CN202039085U (en) | 2011-04-12 | 2011-04-12 | Combination welding porous standard Laval oxygen gun nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202039085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056200A1 (en) * | 2019-09-24 | 2021-04-01 | 西门子（中国）有限公司 | Oxygen delivery apparatus and manufacturing method therefor, and de laval nozzle and manufacturing method therefor |
-
2011
- 2011-04-12 CN CN2011201054941U patent/CN202039085U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056200A1 (en) * | 2019-09-24 | 2021-04-01 | 西门子（中国）有限公司 | Oxygen delivery apparatus and manufacturing method therefor, and de laval nozzle and manufacturing method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20120412 |