CN102528061A - Atomizer capable of preventing blockage of high-melting-point substance in nozzle and flow guide tube - Google Patents
Atomizer capable of preventing blockage of high-melting-point substance in nozzle and flow guide tube Download PDFInfo
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- CN102528061A CN102528061A CN2012100489447A CN201210048944A CN102528061A CN 102528061 A CN102528061 A CN 102528061A CN 2012100489447 A CN2012100489447 A CN 2012100489447A CN 201210048944 A CN201210048944 A CN 201210048944A CN 102528061 A CN102528061 A CN 102528061A
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Abstract
The invention discloses an atomizer capable of preventing blockage of a high-melting-point substance in a nozzle and a flow guide tube. The atomizer is composed of a flow guide tube, a nozzle, a metal jacket, a ceramic circular ring, a metal sealing ring, metal circular rings, a heating body A, a gasket and the like, wherein a gap between the flow guide tube and the metal jacket is provided with the heating body A; a heating body B is arranged in each of gaps of the two Laval-structure air outlet tubes of the nozzle; the inner surface of the metal jacket is provided with a metal reflection film or a sprayed white reflection coating; the lower end part of the metal jacket and the lower end part of the flow guide tube are level and are in threaded connection with the ceramic circular ring; the end parts of the air outlets of the Laval-structure air outlet tubes of the nozzle are provided with the metal circular rings; and the end parts of the gaps of the air outlet tubes are in threaded connection and sealed by the metal sealing ring. According to the atomizer capable of preventing blockage of a high-melting-point substance in the nozzle and the flow guide tube, the problem of blockage of the high-melting-point substance can be effectively solved, the atomizer has the advantages of simple structure, material saving and the like and is convenient to install.
Description
Technical field
The present invention relates to make the used a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of superfine powder with atomizing molten materials with gases.
Background technology
Gas atomization; Be called spray-on process again; It is to utilize the kinetic energy of gas atomization medium to overcome the interatomic bonding force of metal liquid and the milling method that makes it to be dispersed into powder; It is applicable to the production of multiple powder, like alloy powders such as multiple metal dust such as aluminium, tin, lead, copper, silver, nickel and brass, bronze, stainless steel, steel alloy, iron-based, Ni-based, cobalt-baseds.The metal or alloy powder that gas atomization is produced is generally sphere or elliposoidal; Because gas atomization has high cooling velocity and degree of supercooling; Therefore gas atomization can reduce the segregation of alloying component effectively, and the acquisition microstructure is tiny, composition is even, hypoxic alloy powder.Therefore not being merely the raw material that powder metallurgy industry provides high-quality, also is other relevant industries of powder, and the metal and the alloy powder of high-quality is provided like industries such as spraying, surfacing, scolders.In addition, through the control condensing rate, can obtain to have amorphous, the powder of non-equilibrium microstructures such as accurate brilliant, crystallite or supersaturated solid solution, so gas atomization high-tech sectors such as high-performance metal, special alloy, composite have been widely used in.
The overall process of atomizing is extremely complicated, and atomizing effect receives multiple factor affecting, and the core of atomization technique is the surface ability that how kinetic energy of gas is changed into efficiently atomized powder.The degree of grinding of metal liquid stream in the atomizing, key depends on the kinetic energy of air-flow.Relation according to kinetic energy and quality, speed can be known, augmented flow and speed all can make kinetic energy increase.Therefore square being directly proportional of kinetic energy and speed, improve the speed of air-flow, and its effect can be more obvious.Common gas atomization great majority all are the subsonic speed gas atomization, and under subsonic speed gas atomization situation, the size distribution of powder is very wide, and the acquisition of small particle diameter and narrower size distribution powder granule becomes possibility and the supersonic gas atomization technique makes more.
Atomizer is the core of gas atomization technology, and nozzle control air-flow is to the mechanism of metal liquid stream, make the kinetic energy of air-flow be converted into new green powder the surface can, so atomizer especially nozzle determined the performance and the nebulization efficiency of atomized powder.
The version of atomizer is varied in the prior art; Be divided into annular distance type atomizer and circumferential weld type atomizer according to nozzle arrangements; No matter be the circumferential weld type or the atomizer of annular distance type structure; Nozzle and mozzle phenomenon of blocking in use often take place, and this is caused by following several respects reason at least: the one, and molten metal occurs solidifying because temperature reduces in flow process; The 2nd, the air-flow that nozzle penetrates can be ejected into the mozzle port more or less and produce cooling consumingly, flow is solidified block mozzle and nozzle; The 3rd, the negative pressure turbulent region of mozzle below makes molten drop splash jet hole and causes and block; The 4th, because backwash appears in molten drop in atomization process; Promptly the drop of atomizing is to the direction flight of aerodynamic atomization nozzle; The molten drop of backwash adheres to the lower end of aerodynamic atomization nozzle; And constantly solidify accumulation, finally cause the obstruction of aerodynamic atomization nozzle and mozzle and atomization process is interrupted; The 5th, when preparing alloy powder, gas atomization often is in the oxidizing atmosphere, and certainly will make the alloy powder surface that oxidation takes place; Even be under the protective atmosphere; But because protective gas is not pure fully; Therefore also unavoidably make the alloy powder surface that to a certain degree oxidation takes place, form the oxide thin layer film at powder surface, in case oxide-film forms certain thick layer; The drip gauge surface tension is entirely ineffective, influences the balling ratio of powder.Along with increasing of compound amount, can nozzle and mozzle be stopped up.In case nozzle and mozzle stop up, production can't be proceeded.Especially for situation about stopping up owing to compound; The conventional way of atomizer being pulled down mediation usually can not be dealt with problems; This mainly is because the general higher cause of the fusing point of compound in this case, has only the whole atomizer of replacing; This has increased production cost greatly, and influences preparation efficiency and product quality.
At present; The technology of atomizer being improved renewal has a lot; Related patent U.S. Patent No. also has a lot; But these technology are relevant how to control the metal dust granularity and aspect such as how to enhance productivity mostly, and the inventor is a kind of sprayer that prevents that the high-melting-point material from stopping up in denomination of invention, and the patent No. is 201110452116.5 in patent application, to have mentioned a kind of solution atomizer blockage problem; But still exist because of thereby the long influence atomizing of distance powder between jet expansion and the atomizing point reaches the technical problem of desirable crushing effect, but the distance that shortens between jet expansion and the atomizing point causes easily that then nozzle and mozzle block.And this technical problem the present invention's technical problem that will solve just.
Summary of the invention
The objective of the invention is to provide a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves in order to solve above-mentioned technical problem.
Technical scheme of the present invention
A kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention; Being used to of promptly providing prevents that metal or alloy from stopping up the especially atomizer of compound blockage problem such as metal or alloy oxide; It is through changing the structure of atomizer, heater all being installed respectively in the gap of the gap of between mozzle and metal-coating, leaving and the escape pipe of nozzle.Simultaneously; End in that the gas outlet of the escape pipe of draft tube outlets place that compounds such as oxide often takes place adhere to and nozzle is located is installed a removable ceramic annulus and metal ring respectively; The material that the inner surface of pottery annulus is placed or spraying is gone up is difficult to adhere to metal or alloy liquation and oxide thereof or compound, thus reach the purpose that prevents to stop up, solve obstruction.
Described a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material comprises mozzle, nozzle, and metal-coating, ceramic annulus, metal ring and metallic packing ring also comprise packing ring in addition;
Described nozzle is provided with two air inlet pipe and two escape pipes; Particularly two of described nozzle escape pipes adopt the Laval structures, the angle between the axis of the escape pipe of two laval structures of nozzle 20
75
between;
Wherein the peripheral 10mm ~ 100mm place of the escape pipe of each laval structure all is provided with the gap; Heater B all is installed in the gap; And the metallic packing ring seal with screwed joint is all adopted in the end in the gap of the escape pipe of each Laval structure, and the metallic packing ring bottom protrudes from nozzle escape pipe bottom;
Further, the end at place, the gas outlet of the escape pipe of each laval structure of nozzle is connected with metal ring respectively, and described metal ring internal diameter is according to the escape pipe of laval structure, and the metal ring outer radius adopts with the end of escape pipe and is threaded;
The upper end core of described metal-coating has the hole that adapts with the mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered, and mozzle was concentric with metal-coating when metal-coating was installed;
The lower edge of the upper end of described mozzle and the upper end of metal-coating are provided with the groove of corresponding recessed portion near corresponding position, the edge of internal diameter; The packing ring that plays the role of positioning is placed in the groove the inside, guarantees that finally the bottom of mozzle is concordant with the bottom of metal-coating;
Be provided with the gap of 10mm ~ 100mm between mozzle and the metal-coating, heater A is installed in the gap; Mozzle does not directly contact with metal-coating, can prevent the conduction between heater A and the metal-coating on the one hand, can reduce scattering and disappearing of mozzle heat on the other hand greatly;
Be equipped with external power interface on described heater A and the heater B and be connected with extraneous power supply; In case in a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention uses, take place under the situation of metal or low melting point obstruction; Can switch on simultaneously through heater A and heater B; Heating makes its fusing that heats up to tamper, reaches to solve the purpose that metal or alloy stops up;
In addition, preferably being provided with metallic reflective coating near the inner surface of heater A or spraying forms one deck white reflecting coating at metal-coating, is the energy that is used for reflecting the heater radiation, reduces the energy-conservation effect of energy loss thereby reach;
The used coating of described white reflecting coating is preferably tin oxide;
Described ceramic annulus and mozzle uniform internal diameter, the external diameter of ceramic annulus have a boss less than metal-coating bottom internal diameter on the edge in the inner footpath of ceramic annulus, and this boss structure matches with the recessed portion of mozzle bottom;
The pottery annulus is installed to the bottom of mozzle and is embedded in the metal-coating; The boss of pottery annulus is embedded on the recessed portion of mozzle bottom; The pottery annulus adopts with metal-coating and is threaded; After installing, guarantee to protrude from the lower surface of metal-coating with the corresponding another side of boss one side is arranged on the ceramic annulus;
The inner surface spraying of pottery annulus is gone up and the material that often takes place to stop up; The material that is difficult to adhere to like metal, alloy liquation, metal oxide or metallic compound; Be used for preventing the accumulation of solidifying of oxide or other compound, thereby reach the purpose that prevents to stop up, solve obstruction at circular body surface; The selection of inner surface spraying material will be according to different atomization metals, and methods such as employing angle of wetting are confirmed;
Described metal-coating, mozzle, ceramic annulus, metal ring and metallic packing ring can be different according to atomization metal or alloy powder, select material different;
But described metal-coating, metal ring and metallic packing ring selection intensity be high, be easy to process, inexpensive material, like carbon steel or stainless steel;
Even that described mozzle, ceramic annulus can be selected is high temperature resistant, thermal insulation good, inertia, be easy to process or be difficult to process but can be made into the material of simple shape, like aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics, silicon carbide ceramics and other refractory ceramics;
Described heater A and heater B are different, optional with electric furnace heating wire, silicon carbon rod heater according to atomization metal or alloy powder.
Above-mentioned a kind of assembling process that solves the atomizer that nozzle and mozzle high-melting-point material stop up is following:
At first in the gap of the escape pipe of two laval structures of nozzle, heater B is installed all; In the end in the gap of the escape pipe of two aval structures of nozzle metallic packing ring is installed all afterwards; In the end at the place, gas outlet of the escape pipe of two laval structures of nozzle metal ring is installed all subsequently; Described metal ring internal diameter is according to the escape pipe of laval structure, and the metal ring outer radius adopts with the end of the escape pipe of laval structure and is threaded;
Then heater A is installed in the metal-coating the inside;
Put into mozzle in heater A inboard subsequently, the center of mozzle overlaps with the center of metal-coating, places ceramic annulus in exit, mozzle bottom at last, installs thereby accomplish a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material.
Utilize above-mentioned a kind of atomizer that prevents that nozzle and mozzle high-melting-point material from stopping up to atomize and prepare the metal or alloy ultra-micro powder; Can produce after being about to the metal-coating of above-mentioned atomizer and pipeline on the melt stove being connected; Just in case the situation that low melting point such as metal or alloy blocks takes place, energized heats or changes mozzle through heater A and heater B and gets final product in the production process.
Beneficial effect of the present invention
A kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention; Through changing the structure of atomizer; Between mozzle and metal-coating, install in the heater A, also in the gap of nozzle escape pipe introducing Laval structure, heater B is installed all, through heating simultaneously; Can eliminate the low melting point tamper that metal or alloy forms effectively; Can also the preheating atomization gas and molten metal played insulation effect, can prevent effectively the cooled and solidified that produces in the flow process that molten metal causes because of reasons such as Changes in weather to take place thereby avoid nozzle and mozzle bottom to stop up the phenomenon that atomizing can't be continued.In addition; The employing of heater; Can eliminate the interference of low melting point tamper, the rum point that therefore helps shortening air-flow and flow is to the distance of mozzle bottom and the speed of maintenance air-flow, and more small particle diameter and narrower size distribution powder granule are highly beneficial for obtaining for these.
A kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention; The end at the place, gas outlet of the escape pipe of two laval structures through nozzle and removable metal ring and the ceramic annulus that install respectively in exit, mozzle bottom; Can through changing them, reach the effect of other assembly of protection atomizer in the situation of oxide or other compound generation obstruction; Practice thrift material, reduced production cost.
Of the present inventionly a kind ofly solve that most materials adopts metal material in the atomizer that nozzle and mozzle high-melting-point material stop up; Not only cheap, easy to process; Reusable, and can prevent that the mozzle bottom from contacting with the high speed cold air-flow, heating status is significantly improved; Thermal shock resistance improves, and is difficult for bursting.Because the protection of metal-coating, the mozzle security performance improves, and difficultly fractures or damages.
The use of Laval structure can make high pressure draught be accelerated to the supersonic speed level through atomizer, helps obtaining more small particle diameter and narrower size distribution powder granule.
A kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention; Gapped heat insulation between mozzle and metal-coating; Metal-coating does not contact with mozzle, and area of dissipation reduces, and two escape pipes of nozzle are introduced the Laval structure; Heater B preheating simultaneously atomization gas is installed respectively in the gap of the escape pipe through the Laval structure; Make mozzle directly not contact the high speed cold air-flow, these measures can keep the temperature of melt significantly, reduce the melt atomizing degree of superheat and reduce the danger of stopping up; The use of heater also provides guarantee for reducing the atomizing degree of superheat.The reduction of melt overheat degree can effectively weaken the reaction between melt and the mozzle, alleviates composition and pollutes, and improves the quality of powder.
In addition, a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention, simple in structure; Easy to use, cost is low, can be repeatedly used; Can not damage atomizer with stopping up mediation apace, it is effective that therefore solution obstruction, mediation are stopped up, and can save the work into mediation or replacing nozzle and mozzle greatly; Improve production efficiency, reduced labour intensity.
Description of drawings
Fig. 1, a kind of structural representation that solves the atomizer of nozzle and the obstruction of mozzle high-melting-point material of the present invention, 1 is mozzle among the figure, 2 is packing ring; 3 is metal-coating, and 4 is heater A, and 5 is the gap between mozzle and the metal-coating; 6 is reflectance coating, and 7 is ceramic annulus, and 8 is nozzle; 91 and 92 is the air inlet pipe of nozzle, and 101 and 102 is the gap of escape pipe of two Laval structures of nozzle, and 111 and 112 is the escape pipe of two Laval structures of nozzle; 121 and 122 is heater B, and 131 and 132 is metallic packing ring, and 141 and 142 is metal ring;
Fig. 2, a kind of structural representation enlarged drawing that solves escape pipe 111, heater B121, metallic packing ring 131 and the metal ring 141 of the right side Laval structure of nozzle in the atomizer that nozzle and mozzle high-melting-point material stop up of the present invention; Wherein 101 is the gap of the escape pipe of nozzle; 111 is the escape pipe of the Laval structure of nozzle; 121 is heater B, and 131 is metallic packing ring, and 141 is metal ring.
The specific embodiment
Below through embodiment and combine accompanying drawing that the present invention is done further elaboration, but do not limit the present invention.
Embodiment 1
A kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material, its structural representation is as shown in Figure 1, and it comprises that 1 is mozzle, and 2 is packing ring; 3 is metal-coating, and 4 is heater A, and 5 is the gap between mozzle and the metal-coating; 6 is reflectance coating, and 7 is ceramic annulus, and 8 is nozzle; 91 and 92 is the air inlet pipe of nozzle, and 101 and 102 is the gap of escape pipe of two laval structures of nozzle, and 111 and 112 is the escape pipe of two Laval structures of nozzle; 121 and 122 is heater B, and 131 and 132 is metallic packing ring, and 141 and 142 is metal ring;
Described nozzle 8 is provided with two air inlet pipe 91 of nozzle and the escape pipe 111 and 112 of 92 and two Laval structures;
Angle between the escape pipe 111 of two Laval structures of described nozzle 8 and 112 the axis 20
~ 75
between; The escape pipe 111 of two laval structures and peripheral 10mm ~ 100mm place of 112 are provided with gap 101 and 102; Heater B121 and 122 is installed in the gap 101 and 102; Metal ring 141 and 142 is installed in the end at the escape pipe 111 of two Laval structures of nozzle 8 and place, 112 gas outlet; Metal ring 141 and 142 internal diameter are according to the escape pipe 111 and 112 of laval structure; The escape pipe 111 of metal ring 141 and 142 outer radius and two laval structures and 112 end are adopted and are threaded, and the escape pipe 111 of two Laval structures of nozzle 8 and 112 gap 101 are connected with 132 thread seals with 102 end employing metallic packing ring 131;
Described metal-coating 3 is cylindric, adopts carbon steel or stainless steel material, and the upper end core of metal-coating 3 has the hole that adapts with mozzle 1 external diameter, and in order to mozzle 1 to be installed, the lower end of metal-coating 3 is uncovered;
Described mozzle 1 adopts aluminium oxide ceramics; Make mozzle 1 concentric during installation with metal-coating 3; The lower edge of the upper end of mozzle 1 and metal-coating 3 upper ends are provided with the groove of corresponding recessed portion near corresponding position, the edge of internal diameter; The packing ring 2 that place the groove the inside plays the role of positioning, and is concordant with metal-coating 3 bottoms to guarantee mozzle 1;
Be provided with the gap 5 of 10mm ~ 100mm between mozzle 1 and the metal-coating 3; 5 li heater A4 is installed in the gap; Be equipped with external power interface on heater A4 and the above-mentioned heater B121 and 122 and be connected with extraneous power supply; A kind of the solution under the situation that atomizer generation metal that nozzle and mozzle high-melting-point material stop up or low melting point stop up of the present invention; Can be through heater A4 and heater B121 and 122 energisings, heating makes its fusing that heats up to tamper, reaches the purpose that prevents that metal or alloy from stopping up;
Form white reflecting coating 6 at metal-coating 3 near the inner surface of heater A4 spraying one deck tin oxide, when heater A4 worked, the heat of 6 couples of heater A4 of white reflecting coating radiation played reflex, prevents the consumption of heat;
Described ceramic annulus 7 adopts aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or thyrite; Pottery annulus 7 and mozzle 1 uniform internal diameter; The external diameter of pottery annulus 7 is less than metal-coating 3 bottom internal diameters; On the edge in pottery annulus 7 inner footpaths a boss is arranged, this boss structure matches with the recessed portion of mozzle bottom;
Pottery annulus 7 is installed to the bottom of mozzle 1 and is embedded in the metal-coating 3; The boss of pottery annulus 7 is embedded on the recessed portion of mozzle 1 bottom; Pottery annulus 7 adopts with metal-coating 3 and is threaded; After installing, guarantee to protrude from the lower surface of metal-coating 3 with the corresponding another side of boss one side is arranged on the ceramic annulus 7;
The material that is difficult to adhere to metal or alloy liquation and oxide thereof or compound is gone up in the inner surface spraying of pottery annulus 7;
Under the situation that a kind of atomizer generation high-melting-point material that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention stops up, can be through changing ceramic annulus 7 or metal ring 141 and 142.After the ceramic annulus 7 or metal ring 141 and 142 dismountings of atomizer, the bur on it can adopt cutting tools such as carbide alloy, cubic boron nitride or diamond cutter to remove.
Application implementation example 1
Embodiment 1 described a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material prepares the application in the process at the metal or alloy ultra-micro powder, and method is following:
The assembling of atomizer
At first in the gap 101 and 102 that two escape pipes 111 and 112 places of the nozzle of Laval structure are provided with, heater B121 and 122 are installed all; In the gap 101 of two escape pipes 111 of nozzle and 112 and 102 end thread metallic packing ring 131 and 132 is installed afterwards; In the end at the place, gas outlet of two escape pipes 111 of nozzle and 112 metal ring 141 and 142 is installed subsequently; Described metal ring 141 and 142 internal diameters are according to the laval structure of escape pipe; Metal ring 141 and 142 outer radius adopt with the end of escape pipe 111 and 112 and are threaded, and see that specifically Fig. 2 is that example describes with the structural representation enlarged drawing of escape pipe 111, heater B121, metallic packing ring 131 and the metal ring 141 of the right side Laval structure of nozzle in a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material, and wherein 101 is the gap of the escape pipe of nozzle; 111 is the escape pipe of the Laval structure of nozzle; 121 is heater B, and 131 is metallic packing ring, and 141 is metal ring;
Heater A4 then is installed in metal-coating 3 the insides; Put into mozzle 1 in heater A4 inboard subsequently; At last place ceramic annulus 7, thereby accomplish the installation of the atomizer that prevents that the high-melting-point material from stopping up in the exit, bottom of mozzle 1;
Utilize above-mentioned a kind of atomizer that prevents metal or alloy obstruction type preparation metal or alloy fine powder that atomizes; Can produce after being about to the mozzle 1 of above-mentioned atomizer and pipeline on the melt stove being connected; The situation that metal or alloy blocks just in case take place in ceramic annulus 7 or metal ring 14 places in the production process; The energized heating is worked heater A4 or heater B121 and 122 or is changed ceramic annulus 7 and metal ring 141 and 142, can continue to produce, thereby improve production efficiency.
Through using the result to show; Compare with existing atomizer; A kind of use of atomizer in the metal or alloy powder preparing that solves nozzle and the obstruction of mozzle high-melting-point material of the present invention can prevent that thereby the obstructing problem of metal or alloy from having reduced the loss of material; Promptly practice thrift material, reduced production cost, also improved the quality of product.
Foregoing is merely the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (9)
1. an atomizer that solves nozzle and the obstruction of mozzle high-melting-point material comprises mozzle, nozzle, metal-coating, ceramic annulus and heater A,
The upper end core of described metal-coating has the hole that adapts with the mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered;
The lower edge of the upper end of described mozzle and the upper end of metal-coating are provided with the groove of corresponding recessed portion at the edge near internal diameter, and metal-coating when installing mozzle concentric with metal-coating;
Be provided with the gap of 10mm ~ 100mm between mozzle and the metal-coating, heater A is installed in the gap;
Described ceramic annulus and mozzle uniform internal diameter, the external diameter of ceramic annulus have a boss less than metal-coating bottom internal diameter on the edge in the inner footpath of ceramic annulus, and this boss structure matches with the recessed portion of mozzle bottom;
The pottery annulus is installed to the bottom of mozzle and is embedded in the metal-coating; The boss of pottery annulus is embedded on the recessed portion of mozzle bottom; The pottery annulus adopts with metal-coating and is threaded; After installing, guarantee to protrude from the lower surface of metal-coating with the corresponding another side of boss one side is arranged on the ceramic annulus;
The material that the inner surface spraying is gone up and metal, alloy liquation, metal oxide or metallic compound are difficult to adhere to of pottery annulus;
It is characterized in that also comprising a packing ring, described packing ring is placed in the upper end of lower edge and metal-coating of upper end of above-mentioned mozzle in the edge near internal diameter is provided with the groove of corresponding recessed portion;
And described nozzle is provided with the escape pipe of two air inlet pipe and two Laval structures; Wherein the peripheral 10mm ~ 100mm place of the escape pipe of each laval structure all is provided with the gap; Heater B all is installed in the gap; And the metallic packing ring seal with screwed joint is all adopted in the end in the gap of the escape pipe of each Laval structure, and the metallic packing ring bottom protrudes from the bottom of nozzle escape pipe;
The end at the place, gas outlet of the escape pipe of each laval structure is connected with metal ring respectively, and described metal ring internal diameter is according to the escape pipe of laval structure, and the metal ring outer radius adopts with the end of escape pipe and is threaded;
Be respectively equipped with external power interface on described heater A and the heater B and be connected with extraneous power supply.
2. a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves as claimed in claim 1 is characterized in that being provided with the white reflecting coating that metallic reflective coating or spraying form at metal-coating near the inner surface of heater A.
3. a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves as claimed in claim 2 is characterized in that the used coating of described white reflecting coating selects tin oxide for use.
4. a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves as claimed in claim 3 is characterized in that described ceramic annulus selects aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics for use.
5. a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves as claimed in claim 4 is characterized in that described metal-coating, metal ring and metallic packing ring select carbon steel or stainless steel for use.
6. a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material as claimed in claim 5 is characterized in that described packing ring adopts plastics or metal washer.
7. a kind of atomizer that solves nozzle and the obstruction of mozzle high-melting-point material as claimed in claim 6 is characterized in that described heater A or heater B select electric furnace heating wire or silicon carbon rod for use.
8. like the described a kind of atomizer that nozzle and mozzle high-melting-point material stop up that solves of the arbitrary claim of claim 1 ~ 7, it is characterized in that described mozzle selects aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics for use.
9. utilize the described a kind of atomizer that prevents that nozzle and mozzle high-melting-point material from stopping up of the arbitrary claim of claim 1 ~ 8 to atomize and prepare the metal or alloy ultra-micro powder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210048944 CN102528061B (en) | 2012-02-29 | 2012-02-29 | Atomizer capable of preventing blockage of high-melting-point substance in nozzle and flow guide tube |
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|---|---|---|---|
| CN 201210048944 CN102528061B (en) | 2012-02-29 | 2012-02-29 | Atomizer capable of preventing blockage of high-melting-point substance in nozzle and flow guide tube |
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| JP2004317096A (en) * | 2003-04-21 | 2004-11-11 | Daido Steel Co Ltd | Metal melting and atomizing apparatus |
| CN201255566Y (en) * | 2008-07-31 | 2009-06-10 | 上海沃迪科技有限公司 | Spray drying machine |
| CN101879600A (en) * | 2010-07-06 | 2010-11-10 | 河南省远洋铝业有限公司 | Anti-blocking atomizer nozzle for preparing micro-fine metal powder and anti-blocking method thereof |
| CN202667659U (en) * | 2012-02-29 | 2013-01-16 | 上海应用技术学院 | Atomizer capable of removing high-melting-point material blocking of jet nozzle and diversion pipe |
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| CN102528061B (en) | 2013-08-14 |
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