CN105256107A - Ring groove coherent jet nozzle structure - Google Patents
Ring groove coherent jet nozzle structure Download PDFInfo
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- CN105256107A CN105256107A CN201510833331.8A CN201510833331A CN105256107A CN 105256107 A CN105256107 A CN 105256107A CN 201510833331 A CN201510833331 A CN 201510833331A CN 105256107 A CN105256107 A CN 105256107A
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- outer tube
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Abstract
The invention provides a ring groove coherent jet nozzle structure. The ring groove coherent jet nozzle structure comprises a nozzle core tube and a nozzle outer tube, wherein a centre hole and throttling holes distributed around the center hole are formed in the nozzle outer tube; the nozzle core tube is inserted into the center hole; the nozzle core tube and the nozzle outer tube are positioned by a positioning structure; the external contour of the nozzle core tube and the inner contour surface of the nozzle outer tube center hole form a porous ring groove type gas channel and a conical annular gas channel. Through the ring groove coherent jet nozzle structure, the surrounding and accompanying flow is added at the outer layer of supersonic jet flow, so that the central supersonic jet flow is low in expansion and attenuation; the supersonic jet flow is relatively long; when the ring groove coherent jet nozzle structure is applied to an RH vacuum refining furnace top lance, the penetration depth and the stirring strength of oxygen jet flow to a melting tank can be improved; meanwhile, the jet flow speed is slowly attenuated, so that the blowing gun position of an oxygen gun can be improved; the impact depth of the jet flow on the molten steel is not influenced; the service life of an oxygen gun nozzle is prolonged.
Description
Technical field
The present invention relates to for generating the jet apparatus of the long Oxygen Flow of supersonic speed in metallurgy industry, particularly a kind of annular groove cluster fluidic nozzle structure.
Background technology
RH equipment for vacuum refining is a kind of ferrous metallurgy technology that last century, the fifties grew up, and except vacuum outgas outside function, also has oxygen decarburization function, makes the extensive smelting of ultra low-carbon steel become possibility.Originally its device realizing oxygen decarburization function is arranged on vacuum tank bottom, is arranged in the middle part of vacuum tank afterwards, is finally arranged on vacuum tank top, become water-cooled top blow oxygen lance.In prior art, no matter be that RH-KTB pushes up rifle, RH-MFB pushes up rifle, RH-MESID pushes up rifle, RH-PB pushes up rifle or Chinese patent 200420027046.4, 200610076151.0, 200820174977.5, 200820174973.7, 200820174973.7, 201110000083.0, 201210346652.1, 201310431081.6 involved top rifle or shower nozzle, all adopt circular hole convergent-divergent channel structure, namely convergent-divergent channel is generally in central position, blast tube is distributed in outside convergent-divergent channel, this kind of range limiting raising supersonic oxygen jet further, namely need in the oxygen decarburization phase position top rifle being dropped to 2.5 ~ 3.5m on molten steel face, the powder injection desulphurization phase drop to below 1m even about 0.1m implement dust, and, oxygen blast generally can not be carried out with dusting simultaneously, extend the process cycle of vacuum refinement undoubtedly, obstruction realizes high rifle position refining, reduce the process requirements of molten steel splash and rifle head dry slag.Existing RH vacuum outgas and oxygen decarburization, rifle position is not high enough also cannot avoid rifle head dry slag, supersonic flows of oxygen is dispersed too fast cannot formation molten steel surface and effectively impacted until inject and penetrate molten steel face etc., particularly dust and need closer to molten steel face and pulvis enters vacuum system corrosion pipeline, make the technology of dusting be difficult to promote in RH.
The circumferential weld involved by patent of invention such as Chinese Patent Application No. 2015102313132,2014103868764,2014103876370,2014103868800 and ring slot top rifle structure, oxygen blast and the technological process of dusting can be carried out simultaneously, and rifle position need not be reduced again during powder injection desulphurization.Even if the supersonic airstream that this Novel top rifle structure produces can wrap up pulvis and combustion gas, but the supersonic jet still with other spray gun is the same, winding-up distance relatively short and dispersion, the diffusion of jet and decay make the surging force of oxygen jet to molten bath little, the shallow hole formed on molten steel surface hinders Molten Steel Flow on the contrary, affects mixing time.
For increase in RH refining process pulvis and molten steel reaction interface, shorten injecting time, improve the utilization ratio of pulvis, reduce the consume of refractory materials in RH equipment, remove in molten steel that to be mingled be the inevitable requirement of vacuum refining process to greatest extent.But this process requirements of existing RH vacuum refining top gun structural limitations, constrains the development of more efficient RH refinery practice, be therefore necessary to study a kind ofly support oxygen blast, dust, spray gun spray nozzle structure that the refinery processes such as combustion heating carries out simultaneously.
Summary of the invention
The deficiencies in the prior art in view of the above, the object of the present invention is to provide a kind of annular groove cluster fluidic nozzle structure that multiple fields such as a kind of applicable RH vacuum refinement use, to reach raising range oxygen, reduce stifled rifle probability, extend its work-ing life, improve the object of winding-up usefulness.
For achieving the above object and other relevant objects, technical solution of the present invention is as follows:
A kind of annular groove cluster fluidic nozzle structure, comprise sprinkler core pipe and shower nozzle outer tube, described shower nozzle outer tube offers centre hole and the throttle orifice around centre hole distribution, described sprinkler core pipe inserts in centre hole, and and located by locating structure between shower nozzle outer tube, form concrete dynamic modulus annular groove shape gas passage and tapered annular gas passage between wide face in described sprinkler core pipe external profile surface and shower nozzle outer tube.
Adopt said structure, concrete dynamic modulus annular groove shape gas passage and tapered annular gas passage can make oxygen by time obtain supersonic speed accelerate, and the oxygen flowed out by shower nozzle outer tube throttle orifice flows around adjoint at the outer layer ring of the main oxygen of supersonic speed, central supersonic jet is expanded and decays less, supersonic jet is longer, improve oxygen jet to the penetration depth in molten bath and stirring intensity, simultaneously because jet speed decay delays, the blowing rifle position of oxygen rifle can be improved, and do not affect the impact depth of jet to molten steel, extend the work-ing life of oxygen lance blow head.Oxygen flows out the outer layer ring formed and generates carbonic acid gas, the resistance to material of liberated heat heating, vacuum groove around the CO burning that also can produce with molten steel decarburization with stream from throttle orifice, reduce molten steel temperature lowering speed.I.e. combusting carbon monoxide heating, vacuum groove in smelting process, smelts gap winding-up combustion gas and oxygen combustion intensification vacuum tank, reaches the object eliminating residual steel.This structure can be applied to the various shower nozzles such as converter oxygen gun, electric furnace carbon-oxygen gun, pulverized coal injection.
As preferably: in described shower nozzle outer tube centre hole, wide face to be rotated around central axis by three sections of continuous buses and forms, first paragraph bus becomes positive angle to form the reducing conical bore shunk in transverse section with central axis, second segment bus and centerline axis parallel form isometrical cylindrical hole, 3rd section of bus and central axis become to bear angle and form the reducing conical bore that transverse section expands, locating structure is between the cylindrical hole and sprinkler core pipe of shower nozzle outer tube centre hole, make between the second segment of shower nozzle outer tube centre hole and sprinkler core pipe external profile surface, to form concrete dynamic modulus annular groove shape gas passage, the reducing conical bore of shower nozzle outer tube and described sprinkler core pipe gabarit form the long-pending tapered annular gas passage of Varied section, shrunk ring cone section is formed respectively continuously to outlet from oxygen inlet, multigap annular groove section, expanded ring cone section.
As preferably: described locating structure is positioning edge ridge, and described positioning edge ridge is arranged on shower nozzle outer tube or on sprinkler core pipe.
As preferably: the cylindrical hole inner wall even distribution of described shower nozzle outer tube centre hole has 3 roads and above groove, forms described positioning edge ridge between adjacent two grooves.
As preferably: the sprinkler core pipe external profile surface corresponding with the cylindrical hole of shower nozzle outer tube centre hole is circumferentially distributed with multiple cancave cambered surface, forms described positioning edge ridge between adjacent two cancave cambered surfaces.
As preferably: described shower nozzle outer tube also offers open holes, and described open holes is provided with intermediate casing sealedly.In multiple intermediate casing, the auxiliary facilitys such as camera, flame detecting device, gas ignition device can be installed.
As preferably: described open holes is stepped hole, and described mounting hole site is between centre hole and throttle orifice, or described throttle orifice is between centre hole and open holes.
As preferably: also comprise arrange with shower nozzle outer coaxial tube water-cooled outer tube, marine riser, water-cooled inner tube, manage in gas, described water-cooled outer tube and water-cooled inner tube and shower nozzle outer tube welded seal; In described gas, pipe is with the grafting of sprinkler core pipe and by resilient sealing ring sealing.
As preferably: the total area at described concrete dynamic modulus annular groove shape gas passage section minimum aperture place equals velocity of sound air-flow throat area under design gas flow, and tapered annular gas passage designs the supersonic airstream outlet area corresponding to Mach number under the circular space total area that conical bore exit section is total equals to design gas flow.
As preferably: the external profile surface that described sprinkler core pipe is corresponding with the reducing conical bore section that shower nozzle outer tube centre hole shrinks is cylindrical surface.
As preferably: the external profile surface that described sprinkler core pipe is corresponding with the reducing conical bore section that shower nozzle outer tube centre hole shrinks is cone surface.
As preferably: the external profile surface that described sprinkler core pipe is corresponding with the reducing conical bore section of shower nozzle outer tube center hole enlarges is cone surface.
As preferably: the external profile surface that described sprinkler core pipe is corresponding with the reducing conical bore section of shower nozzle outer tube center hole enlarges is cylindrical surface.
As mentioned above, the invention has the beneficial effects as follows:
1, the vacuum refining top gun of nozzle structure of the present invention is adopted to enter RH vacuum chamber by top rifle seal channel, oxygen decarburization and heating by O2 blowing and powder injection desulphurization can be realized to the molten steel in vacuum chamber under vacuum, and under non-vacuum condition, combustion gas baking and heating be blown except cold steel to vacuum chamber.Can make oxygen, combustion gas, desulfurization powder in passages different separately, be delivered to RH vacuum chamber.
2, nozzle structure of the present invention can keep under the oxygen pressure condition identical with traditional RH equipment for vacuum refining, increases oxygen blast flow and does not increase molten steel and blow the hole degree of depth, and then improving decarbonization rate, the usefulness of raising RH equipment for vacuum refining.
3, nozzle structure of the present invention can in powder injection desulphurization period; shielding gas is passed at oxygen channel; make desulfurization powder arrive molten steel surface under being surrounded by the shielding gas of surrounding, thus reduce the pulvis amount siphoned away by vacuum suction, improve the recovery rate of desulfurization powder.
4, nozzle structure of the present invention at baking vacuum chamber or can realize pure oxygen or oxygen-enriched combusting except cold steel period, improves heating efficiency.
5, nozzle structure of the present invention increases around adjoint stream at the skin of supersonic jet, and central supersonic jet is expanded and decays less, supersonic jet is longer.When being applied in RH vacuum refinement furnace roof rifle, oxygen jet can be improved to the penetration depth in molten bath and stirring intensity, simultaneously because jet speed decay delays, the blowing rifle position of oxygen rifle can be improved, and do not affect the impact depth of jet to molten steel, extend the work-ing life of oxygen lance blow head.
6, can there is not aditus laryngis latch up phenomenon when expanding with heat and contract with cold in the annular groove seam shape aditus laryngis of shower nozzle of the present invention, ensures the flow of shower nozzle.
7, nozzle structure of the present invention can install video frequency pick-up head, directly observes below shower nozzle space situation.Gas ignition device and flame monitoring instrument can be installed, realize automatic ignition and safety protection function.
Accompanying drawing explanation
Fig. 1 is annular groove cluster fluidic nozzle structure schematic diagram in the embodiment of the present invention 1;
Fig. 2 is annular groove cluster fluidic shower nozzle bottom schematic view in the embodiment of the present invention 1;
Fig. 3 is the structural representation of shower nozzle outer tube in the embodiment of the present invention 1;
Fig. 4 is the another kind of distribution schematic diagram of throttle orifice in the embodiment of the present invention 1;
Fig. 5 is annular groove cluster fluidic nozzle structure schematic diagram in the embodiment of the present invention 2;
Fig. 6 is annular groove cluster fluidic shower nozzle bottom schematic view in the embodiment of the present invention 2;
Fig. 7 is the structural representation of sprinkler core pipe in the embodiment of the present invention 2.
Piece mark explanation
1 sprinkler core pipe
2 shower nozzle outer tubes
3 intermediate casings
4 water-cooled outer tubes
5 marine risers
6 water-cooled inner tubes
Pipe in 7 gases
8 concrete dynamic modulus annular groove shape gas passages
9 positioning edge ridges
2a centre hole
2b throttle orifice
2c stepped hole
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.
Embodiment 1
As shown in Figure 1 to Figure 3, the invention provides a kind of annular groove cluster fluidic nozzle structure, comprise the coaxial multilayer sleeve, sprinkler core pipe 1, the shower nozzle outer tube 2 that arrange, described multilayer sleeve is respectively pipe 7 in water-cooled outer tube 4, marine riser 5, water-cooled inner tube 6, gas from outside to inside.Water-cooled outer tube 4 and water-cooled inner tube 6 and shower nozzle outer tube 2 welded seal, in gas, pipe 7 is with sprinkler core pipe 1 grafting and by resilient sealing ring sealing.In a structure of the in-vention, be water coolant water entry, water-cooled outer tube 4 and marine riser 5 between water-cooled inner tube 6 and marine riser 5 between pipe 7 in water coolant water exit, water-cooled inner tube 6 and gas for being blast tube in pipe 7 in oxygen channel, gas, also can pass into pulvis as required.
Key of the present invention is, shower nozzle outer tube 2 has a centre hole 2a and multiple throttle orifice 2b uniform around centre hole 2a, and throttle orifice 2b runs through the upper and lower ends of shower nozzle outer tube 2, and the quantity of throttle orifice 2b and the distance of distance centre hole 2a can be arranged according to demand, sprinkler core pipe 1 inserts in the centre hole 2a of shower nozzle outer tube 2, and and be provided with locating structure between shower nozzle outer tube 2, thus form concrete dynamic modulus annular groove shape gas passage 8, concrete dynamic modulus annular groove shape gas passage 8 between sprinkler core pipe 1 and shower nozzle outer tube 2 can make oxygen by time obtain supersonic speed and accelerate, flowed around adjoint at the outer layer ring of the main oxygen of supersonic speed by the oxygen of shower nozzle outer tube 2 throttle orifice 2b, central supersonic jet is expanded and decays less, supersonic jet is longer, improve oxygen jet to the penetration depth in molten bath and stirring intensity, simultaneously because jet speed decay delays, the blowing rifle position of oxygen rifle can be improved, and do not affect the impact depth of jet to molten steel, extend the work-ing life of oxygen lance blow head.The CO burning that the low velocity circulation that shower nozzle outer tube 2 throttle orifice 2b flows out also can produce with molten steel decarburization generates carbonic acid gas, the resistance to material of liberated heat heating, vacuum groove, reduces molten steel temperature lowering speed.
In the middle of centre hole 2a and throttle orifice 2b, stepped hole 2c is had in this example, intermediate casing 3 is installed in stepped hole 2c, intermediate casing 3 inserts the stepped hole 2c of corresponding shower nozzle outer 2 and by resilient sealing ring sealing, can install the auxiliary facilitys such as camera, flame detecting device, gas ignition device in intermediate casing 3.The quantity of stepped hole 2c can be 1 ~ 3, as shown in Figure 4, in other embodiments, stepped hole 2c can be arranged in throttle orifice 2b outer ring (this figure stepped hole is not shown), makes throttle orifice 2b closer to centre hole 2a, and the same like this outer layer ring that can play is around the effect with stream.
In this example, in shower nozzle outer tube 2 centre hole 2a, wide face to be rotated around central axis by three sections of continuous buses and forms, first paragraph bus becomes positive angle to form the reducing conical bore shunk in transverse section with central axis, second segment bus and centerline axis parallel form isometrical cylindrical hole, and the 3rd section of bus and central axis become to bear angle and form the reducing conical bore that transverse section expands.
Further as shown in Figures 2 and 3, the external profile surface that in this example, sprinkler core pipe 1 is corresponding with the isometrical cylindrical section of shower nozzle outer tube 2 centre hole 2a is cancave cambered surface regular polygon cylinder, positioning edge ridge 9 is formed between adjacent two cancave cambered surfaces, cancave cambered surface and the described shower nozzle outer tube 2 centre hole 2a cylindrical section of sprinkler core pipe 1 form described concrete dynamic modulus annular groove shape gas passage 8, and the reducing conical bore of shower nozzle outer tube 2 and described sprinkler core pipe 1 gabarit form the long-pending tapered annular gas passage of Varied section.Passage between sprinkler core pipe 1 and shower nozzle outer tube 2 forms that shrunk ring bores section, multigap annular groove section, expanded ring bore section continuously.
The external profile surface that sprinkler core pipe 1 is corresponding with the reducing conical bore section that shower nozzle outer tube 2 centre hole 2a expands is cone surface or cylindrical surface, the Polygons circumscribed circle diameter of sprinkler core pipe 1 equals the cylinder bore diameter of shower nozzle outer tube 2, the annular groove space that sprinkler core pipe 1 is formed after inserting shower nozzle outer tube 2 centre hole 2a, equal velocity of sound air-flow throat area in the void area that the section part of cylindrical hole section is total, equal area corresponding to supersonic airstream design Mach number in the void area that conical bore exit section is total.
Embodiment 2
As shown in Figures 5 to 7, this example is with the difference of embodiment 1, and the positioning edge ridge 9 as locating structure is arranged in shower nozzle outer tube 2 on wide face, as shown in Figure 6 and Figure 7, the inwall of isometrical circular hole portion is circumferentially evenly equipped with the groove at 3 places or more; Groove and the described sprinkler core pipe 1 cylinder gabarit of shower nozzle outer tube 2 form concrete dynamic modulus annular groove shape gas passage 8, the external profile surface that described sprinkler core pipe 1 is corresponding with the isometrical cylindrical section of shower nozzle outer tube 2 centre hole 2a is cylindrical surface, the body diameter of sprinkler core pipe 1 equals the cylinder bore diameter of shower nozzle outer tube 2, the annular groove space that sprinkler core pipe 1 is formed after inserting shower nozzle outer tube 2 centre hole 2a, equal velocity of sound air-flow throat area in the void area that the section part of cylindrical hole section is total, equal area corresponding to supersonic airstream design Mach number in the void area that conical bore exit section is total.
Other structures are all identical with embodiment 1.
On shower nozzle outer tube 2, offer cancave cambered surface in above-described embodiment or on sprinkler core pipe 1, offer the structure that groove forms positioning edge ridge 9 and be all convenient to processing and manufacturing, the arrangement form of throttle orifice 2b and stepped hole 2c and quantity can be arranged according to the actual requirements.
To sum up, the present invention increases around adjoint stream at the skin of supersonic jet, and central supersonic jet is expanded and decays less, supersonic jet is longer.When being applied in RH vacuum refinement furnace roof rifle, oxygen jet can be improved to the penetration depth in molten bath and stirring intensity, simultaneously because jet speed decay delays, the blowing rifle position of oxygen rifle can be improved, and do not affect the impact depth of jet to molten steel, extend the work-ing life of oxygen lance blow head.
Below the embodiment of the RH vacuum refining top gun adopting the present embodiment shower nozzle is elaborated.
1) RH vacuum refining top gun enters vacuum chamber by the top rifle seal channel at vacuum chamber top, and on top, gun cooling water passage continues to pass into water coolant.Molten steel passes in and out vacuum chamber by the soaking tub bottom vacuum chamber.
2) oxygen decarburization is smelted the phase and is blown oxygen by adding aluminum temperature raising period, and on top, rifle oxygen channel passes into the oxygen that pressure is 0.9MPa, and pipe core passes into inert protective gas.After finishing blowing, oxygen channel inert gas purge, and continue to be blown into protectiveness rare gas element.
3) the powder injection desulphurization phase, pass into the desulfurization powder carried by rare gas element in duff pipe, oxygen channel passes into inertia protection gas.Dust after terminating, duff pipe inert gas purge, oxygen channel, pipe core continue to be blown into protectiveness rare gas element.
4) heat temperature raising or except the cold steel phase; vacuum chamber temperature is lower than opening point fire gas first when 800 DEG C and light a fire; open oxygen and main combustion gas again; combustion gas is passed in pipe core; oxygen channel passes into oxygen-rich air or pure oxygen combustion-supporting; whether the burning of flame monitoring Sensor monitoring is normal, finds flame-out shutoff combustion gas and oxygen immediately, passes into after inertia protection air-blowing is swept and again lights a fire.After process terminates, all need to purge and pass into inertia protection gas.
The present invention is applied to RH vacuum refinement top rifle embodiment and achieves following effect:
1) nozzle structure of the present embodiment is compared with existing nozzle structure, and without the need to adopting precision casting, manufacture difficulty is obviously reduced;
2) owing to adopting annular groove seam shape aditus laryngis section acceleration air-flow, oxygen flow is allowed effectively to increase, and the further efficiency improving oxygen decarburization and blow oxygen by adding aluminum intensification;
3) owing to adopting annular protection of inert gas desulfurization powder, reduce pulvis consumption, improve recovery rate;
4) owing to adopting pure oxygen or oxygen-enriched combustion-supporting coal gas or Sweet natural gas, heating efficiency is significantly improved;
5) supersonic jet improves work rifle position, reduces consumption of cooling-water, extends the top lance spray nozzle life-span;
6) annular groove seam shape aditus laryngis section obviously can reduce stifled rifle probability;
7) annular groove seam shape aditus laryngis section can obviously reduce the impact of expanding with heat and contract with cold on throat area.
8) nozzle structure of the present invention can install video frequency pick-up head, directly observes below shower nozzle space situation.
9) nozzle structure of the present invention can install gas ignition device and flame monitoring instrument, realizes automatic ignition and safety protection function.
10) nozzle structure of the present invention can make supersonic jet keep boundling state over a longer distance, main oxygen stream just can keep in longer distance export time diameter and speed.
Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. an annular groove cluster fluidic nozzle structure, comprise sprinkler core pipe and shower nozzle outer tube, it is characterized in that: described shower nozzle outer tube offers centre hole and the throttle orifice around centre hole distribution, described sprinkler core pipe inserts in centre hole, and and located by locating structure between shower nozzle outer tube, form concrete dynamic modulus annular groove shape gas passage and tapered annular gas passage between wide face in described sprinkler core pipe external profile surface and shower nozzle outer tube.
2. a kind of annular groove cluster fluidic nozzle structure according to claim 1, it is characterized in that: in described shower nozzle outer tube centre hole, wide face to be rotated around central axis by three sections of continuous buses and forms, first paragraph bus becomes positive angle to form the reducing conical bore shunk in transverse section with central axis, second segment bus and centerline axis parallel form isometrical cylindrical hole, 3rd section of bus and central axis become to bear angle and form the reducing conical bore that transverse section expands, locating structure is between the cylindrical hole and sprinkler core pipe of shower nozzle outer tube centre hole, make between the second segment of shower nozzle outer tube centre hole and sprinkler core pipe external profile surface, to form concrete dynamic modulus annular groove shape gas passage, the reducing conical bore of shower nozzle outer tube and described sprinkler core pipe gabarit form the long-pending tapered annular gas passage of Varied section, shrunk ring cone section is formed respectively continuously to outlet from oxygen inlet, multigap annular groove section, expanded ring cone section.
3. a kind of annular groove cluster fluidic nozzle structure according to claim 2, it is characterized in that: described locating structure is positioning edge ridge, described positioning edge ridge is arranged on shower nozzle outer tube or on sprinkler core pipe.
4. a kind of annular groove cluster fluidic nozzle structure according to claim 3, is characterized in that: the cylindrical hole inner wall even distribution of described shower nozzle outer tube centre hole has 3 roads and above groove, forms described positioning edge ridge between adjacent two grooves.
5. a kind of annular groove cluster fluidic nozzle structure according to claim 3, it is characterized in that: the sprinkler core pipe external profile surface corresponding with the cylindrical hole of shower nozzle outer tube centre hole is circumferentially distributed with multiple cancave cambered surface, between adjacent two cancave cambered surfaces, forms described positioning edge ridge.
6. a kind of annular groove cluster fluidic nozzle structure according to claim 1, is characterized in that: described shower nozzle outer tube also offers open holes, and described open holes is provided with intermediate casing sealedly.
7. a kind of annular groove cluster fluidic nozzle structure according to claim 6, is characterized in that: described open holes is stepped hole, is separately installed with camera, portfire and flame monitoring sensor in described intermediate casing.
8. a kind of annular groove cluster fluidic nozzle structure according to claim 1, it is characterized in that: also comprise arrange with shower nozzle outer coaxial tube water-cooled outer tube, marine riser, water-cooled inner tube, manage in gas, described water-cooled outer tube and water-cooled inner tube and shower nozzle outer tube welded seal; In described gas, pipe is with the grafting of sprinkler core pipe and by resilient sealing ring sealing.
9. a kind of annular groove cluster fluidic nozzle structure according to claim 1, it is characterized in that: the total area at described concrete dynamic modulus annular groove shape gas passage section minimum aperture place equals velocity of sound air-flow throat area under design gas flow, and tapered annular gas passage designs the supersonic airstream outlet area corresponding to Mach number under the circular space total area that conical bore exit section is total equals to design gas flow.
10. a kind of annular groove cluster fluidic nozzle structure according to claim 2, is characterized in that: the external profile surface that described sprinkler core pipe is corresponding with the reducing conical bore section that shower nozzle outer tube centre hole shrinks is cylindrical surface or cone surface; The external profile surface that sprinkler core pipe is corresponding with the reducing conical bore section of shower nozzle outer tube center hole enlarges is cone surface or cylindrical surface.
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| CN105567909A (en) * | 2016-03-08 | 2016-05-11 | 中冶赛迪工程技术股份有限公司 | Connecting and sealing structure of annular hole supersonic RH top lance |
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| CN105567909A (en) * | 2016-03-08 | 2016-05-11 | 中冶赛迪工程技术股份有限公司 | Connecting and sealing structure of annular hole supersonic RH top lance |
| CN105567909B (en) * | 2016-03-08 | 2018-04-03 | 中冶赛迪工程技术股份有限公司 | A kind of connection sealing structure of RH annular distances supersonic speed top gun |
| CN105838845A (en) * | 2016-06-06 | 2016-08-10 | 中冶赛迪工程技术股份有限公司 | Supersonic circulating combustion coherent arbon-oxygen lance of electric arc furnace and spray head structure |
| CN105910716A (en) * | 2016-06-06 | 2016-08-31 | 中冶赛迪工程技术股份有限公司 | Non-contact electric-arc-furnace continuous temperature measuring gun structure |
| CN105950824A (en) * | 2016-06-06 | 2016-09-21 | 中冶赛迪工程技术股份有限公司 | Electric arc furnace steelmaking process with oxygen, fuel and powder common injection |
| CN108660275A (en) * | 2018-05-30 | 2018-10-16 | 北京科技大学 | A method of steel-making supersonic jet oxygen rifle and its reduction injection jet noise |
| CN109628754A (en) * | 2019-02-03 | 2019-04-16 | 包头华鼎铜业发展有限公司 | Copper making continuous-blowing furnace oxygen lance nozzle |
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