CN102528060B - Atomizer capable with nozzle and flow guide tube prevented from blockage - Google Patents
Atomizer capable with nozzle and flow guide tube prevented from blockage Download PDFInfo
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- CN102528060B CN102528060B CN2012100487155A CN201210048715A CN102528060B CN 102528060 B CN102528060 B CN 102528060B CN 2012100487155 A CN2012100487155 A CN 2012100487155A CN 201210048715 A CN201210048715 A CN 201210048715A CN 102528060 B CN102528060 B CN 102528060B
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Abstract
The invention discloses an atomizer with a nozzle and a flow guide tube prevented from blockage. The atomizer is composed of a flow guide tube, a metal jacket, a nozzle, a heating body A, a ceramic sealing ring, a metal sealing ring, 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 arrange 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; the end part of a gap between the lower end part of the metal jacket and the lower end part of the flow guide tube is sealed by the ceramic sealing ring; and the end parts of the gaps between the two Laval-structure air outlet tubes of the nozzle are in threaded connection and sealed by the metal sealing ring. The atomizer has the functions of effectively preventing metal and alloy from being blocked and solving the blockage problem, is suitable for melt flow guidance for metal or alloy atomization, has the advantages of simple structure and the like, and is convenient to install, and the production efficiency can be improved.
Description
Technical field
The present invention relates to manufacture superfine powder a kind of atomizer that prevents that nozzle and mozzle from stopping up used with atomizing molten materials with gases.
Background technology
Powder by gas-atomization is to impact liquid metal or alloy stream with high velocity air, and it is broken into to fine droplet, and in environment, cooled and solidified becomes the milling method of powder subsequently.Atomized powder has the advantages such as production that sphericity is high, oxygen content is low and adapt to various metals and alloy powder, has become the main development direction of high-performance and special alloy powder preparation technology.
The overall process of atomization is extremely complicated, and atomizing effect is subject to various factors, and the core of atomization technique is how the kinetic energy of gas to be changed into efficiently to the surface energy of atomized powder.The degree of grinding of metal liquid stream in atomization, key depends on the kinetic energy of air-flow.Known according to the relation of kinetic energy and quality, speed, augmented flow and speed, all can make kinetic energy increase.Square being directly proportional of kinetic energy and speed, therefore, improve the speed of air-flow, and its effect can be more obvious.Common gas atomization great majority are all the subsonic gases atomization, and in subsonic gases atomization situation, the size distribution of powder is very wide, and the supersonic gas atomization technique makes the more acquisition of small particle diameter and narrower size distribution powder granule become possibility.
Atomizer is as the core component of gas atomization technology, and its structure and performance are the prerequisites that determines the atomization quality height.
In prior art, the version of atomizer is varied, be divided into annular distance type atomizer and ring-crack ventilation atomizer according to nozzle arrangements, no matter be ring-crack ventilation or the atomizer of annular distance type structure, the phenomenon that nozzle and mozzle stop up in use often occurs, and this is at least caused by following several respects reason: the one, and molten metal occurs solidifying because temperature reduces in flow process; The 2nd, it is cooling consumingly that the air-flow that nozzle penetrates can be ejected into the generation of mozzle port more or less, liquid stream solidified and block mozzle and nozzle; The 3rd, the negative pressure turbulent region of mozzle below, make molten drop splash jet hole and cause and block; The 4th, backwash appears in atomization process due to molten drop, be the direction flight of the drop of atomization to the aerodynamic atomization nozzle, the molten drop of backwash adheres to the lower end of aerodynamic atomization nozzle, and constantly solidify accumulation, finally cause aerodynamic atomization nozzle and mozzle to stop up and atomization process is interrupted.Once nozzle and mozzle stop up, production can't be proceeded.In this case, only have the whole atomizer of replacing, this has increased production cost greatly, and affects preparation efficiency and product quality.
At present, atomizer is improved to the technology of upgrading to be had a lot, Patents also has a lot, but these technology are relevant how to control the metal dust granularity and the aspect such as how to enhance productivity mostly, the inventor is a kind of sprayer in denomination of invention, the patent No. is to have mentioned a kind of solution atomizer blockage problem in 201110452080.0 patent applications, thereby affect but still exist the technical problem that the atomization powder reaches desirable crushing effect because distance between jet expansion and atomization point is long, but the distance shortened between jet expansion and atomization point easily causes that nozzle and mozzle block.And this technical problem the technical problem to be solved in the present invention just.
Summary of the invention
One of purpose of the present invention is that a kind of atomizer that prevents that nozzle and mozzle from stopping up is provided in order to solve above-mentioned technical problem.
Technical scheme of the present invention
A kind of atomizer that prevents that nozzle and mozzle from stopping up comprises mozzle, nozzle, metal-coating, heater A, ceramic-seal ring, metallic packing ring and packing ring etc.;
Described nozzle is provided with the escape pipe of two air inlet pipe and two Laval structures, and the angle between the axis of the escape pipe of two Laval structures of described nozzle is between 20 ° ~ 75 °;
The peripheral 10mm of the escape pipe of each laval structure ~ 100mm place arranges gap, heater B all is installed in gap, and the end in the gap of the escape pipe of each Laval structure adopts the metallic packing ring seal with screwed joint, the metallic packing ring bottom protrudes from nozzle escape pipe bottom;
The upper end core of described metal-coating has the hole adapted with the mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered, during installation, makes mozzle and metal-coating concentric;
The lower edge of the upper end of mozzle and the upper end of metal-coating are at the groove near being provided with corresponding recessed portion on the corresponding position, edge of internal diameter, the packing ring played the role of positioning is placed in the groove the inside, concordant with the bottom of metal-coating with the bottom that guarantees mozzle;
The gap that 10mm ~ 100mm is arranged between mozzle and metal-coating, install heater A in gap; Mozzle does not directly contact with metal-coating, can prevent the conduction between heater A and metal-coating on the one hand, can greatly reduce on the other hand scattering and disappearing of mozzle heat;
Be equipped with external power interface on described heater A and heater B and be connected with extraneous power supply, in case in the situation that a kind of atomizer that prevents that nozzle and mozzle from stopping up of the present invention, in using, metal occurs or low melting point stops up, can be by heater A and heater B energising, to tamper, heating makes its fusing that heats up, and reaches and solves the purpose that metal or alloy stops up;
In addition, preferably on the surface of the close heater A of metal-coating, being provided with metallic reflective coating or spraying and forming one deck white reflectance coating, is for reflecting the energy of heater A radiation, thereby reach, reduces the energy-conservation effect of energy loss;
Described white reflectance coating coating used is preferably tin oxide;
Gap location in metal-coating and mozzle bottom adopts the ceramic-seal ring seal with screwed joint, and the ceramic-seal ring bottom protrudes from the metal-coating bottom;
Described mozzle, metal-coating, ceramic-seal ring and metallic packing ring can be different according to atomization metal or alloy powder, select different materials;
Even that described mozzle can be selected is high temperature resistant, thermal insulation good, inertia, be easy to processing or be difficult to processing but can be made into the material of simple shape, as aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics, silicon carbide ceramics and other refractory ceramics;
But described metal-coating, metallic packing ring selection intensity be high, be easy to processing, inexpensive material, as carbon steel or stainless steel.
Described ceramic-seal ring material selection zirconyl phosphate ceramics, aluminum phosphate or microcrystal glass processable ceramic;
Described packing ring adopts plastics or metal washer;
Described heater A or heater B are according to atomization metal or alloy powder difference, optional with electric furnace heating wire, silicon carbon rod.
Above-mentioned a kind ofly prevent that the installation process of the atomizer that nozzle and mozzle stop up is as follows:
At first in the gap of the escape pipe of two laval structures of nozzle, heater B is installed respectively, in the end in the gap of the escape pipe of two laval structures near nozzle, metallic packing ring is installed respectively afterwards;
Then in the metal-coating the inside, heater A is installed;
Put into mozzle in the inboard of heater A subsequently, the center of mozzle and the center superposition of metal-coating, then at metal-coating and exit, mozzle bottom placing ceramic sealing ring, install thereby complete a kind of atomizer that prevents that nozzle and mozzle from stopping up.
Utilize above-mentioned a kind of atomizer that prevents that nozzle and mozzle from stopping up to come atomization to prepare the metal or alloy ultra-micro powder, after being about to the metal-coating of above-mentioned atomizer and pipeline on the melt stove being connected, can be produced, in production process, just in case the situation that metal or alloy blocks occurs, switching on power by heater A and heater B heating or changing mozzle gets final product.
Beneficial effect of the present invention
A kind of atomizer that prevents that nozzle and mozzle from stopping up of the present invention, by changing the structure of atomizer, when between mozzle and metal-coating, heater A being installed, also in the gap of the escape pipe of two Laval structures of nozzle, heater B is installed respectively, by heating simultaneously, not only can effectively eliminate the low melting point tamper that metal or alloy forms, can also the preheating atomization gas and molten metal is played to insulation effect, can effectively prevent the cooled and solidified produced in flow process that molten metal causes because of reasons such as Changes in weather, thereby the phenomenon of avoiding nozzle and the obstruction of mozzle bottom that atomization can't be continued occurs.
In addition, in the time of heater A and heater B, adopt, can further eliminate the interference of low melting point tamper, therefore the rum point that is conducive to shorten air-flow and liquid stream to the mozzle bottom apart from and the speed of maintenance air-flow, for obtaining, more small particle diameter and narrower size distribution powder granule are highly beneficial for these.
And the use of the escape pipe Laval structure of nozzle, can make high pressure draught be accelerated to the supersonic speed level by atomizer, be conducive to obtain more small particle diameter and narrower size distribution powder granule.
In addition, gapped heat insulation between mozzle and metal-coating, metal-coating does not contact with mozzle, area of dissipation reduces, in the gap of two escape pipes introducing Laval structures of nozzle, heater B preheating simultaneously atomization gas is installed respectively, make mozzle directly not contact the high speed cold air-flow, these measures can significantly keep the temperature of melt, reduce the melt atomization degree of superheat and reduce the danger of stopping up; The reduction of melt overheat degree, can effectively weaken reacting between melt and mozzle, alleviates composition and pollute, and improves the quality of powder.
Simultaneously, of the present inventionly a kind ofly prevent that in atomizer that nozzle and mozzle stop up, most of material adopts metal material, not only cheap, easy to process, reusable, and can prevent that the mozzle end from contacting with the high speed cold air-flow, heating status is significantly improved, and thermal shock resistance improves, and is difficult for bursting.Due to the protection of metal-coating, the mozzle security performance improves, and difficultly fractures or damages.
As can be seen here, a kind of atomizer that prevents that nozzle and mozzle from stopping up of the present invention, simple in structure, easy to use, cost is low, can be repeatedly used, and anti-clogging, dredge blockage are effective, can will stop up dredging rapidly and do not damage atomizer.Can greatly save the work into dredging or replacing nozzle and mozzle, enhance productivity, reduce labour intensity.
The accompanying drawing explanation
Fig. 1, atomizer structure schematic diagram of the present invention, in figure, 1 is mozzle, 2 is packing ring, 3 is metal-coating, and 4 is heater A, and 5 is the gap between mozzle and metal-coating, 6 is white reflectance coating, 7 is ceramic-seal ring, and 8 is nozzle, 91 and 92 two air inlet pipe that are nozzle, the escape pipe of 101 and 102 two the Laval structures that are nozzle, 111 and 112 is heater B, and 121 and 122 is metallic packing ring, the gap of the escape pipe of 131 and 132 two the laval structures that are nozzle.
The specific embodiment
Also by reference to the accompanying drawings the present invention is further set forth below by embodiment, but do not limit the present invention.
Embodiment 1
A kind of atomizer that prevents that nozzle and mozzle from stopping up, its structural representation as shown in Figure 1, it also comprises gap 5, heater A4, white reflectance coating 6, ceramic-seal ring 7, heater B111 and B112, metallic packing ring 121 and 122, packing ring 2 between metal-coating 3, mozzle 1 and metal-coating 3 by mozzle 1, nozzle 8.
Described nozzle 8 is provided with two air inlet pipe 91, the escape pipe 101 and 102 of 92 and two Laval structures, angle between two escape pipes 101 of nozzle and 102 axis is between 20 ° ~ 75 °, the escape pipe 101 of two laval structures of nozzle 8 and 102 peripheral 10mm ~ 100mm place arranges gap 131 and 132, heater B111 and B112 are all installed in gap 131 and 132 inside, the escape pipe 101 of two laval structures of nozzle adopts metallic packing ring 121 to be connected with 122 thread seals with 102 gap 131 with 132 end, the bottom that guarantees metallic packing ring 121 and 122 after installation protrudes from the escape pipe 101 of two laval structures of nozzle and 102 bottom,
The upper part of described metal-coating 3 has the hole adapted 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, during installation, make mozzle 1 concentric with metal-coating 3, the upper end of the lower edge of the upper end of mozzle 1 and metal-coating 3 is at the groove near being provided with corresponding recessed portion on the corresponding position, edge of internal diameter, the packing ring 2 that place the groove the inside plays the role of positioning, concordant with metal-coating 3 bottoms to guarantee mozzle 1;
The gap 5 that 10mm ~ 100mm is arranged between mozzle 1 and metal-coating 3,5 li heater A4 is installed in gap, heater A4 and heater B111 be respectively equipped with external power interface on B112 and be connected with extraneous power supply, in the situation that of the present invention a kind ofly metal occurs in preventing atomizer use procedure that nozzle and mozzle stop up or low melting point stops up, can be by heater A4 and heater B111 and B112 energising, to tamper, heating makes its fusing that heats up, and reaches and solves the purpose that metal or alloy stops up;
Surface spraying one deck white reflectance coating 6 at metal-coating 3 near heater A4, when heater A4 works, the heat of 6 couples of heater A4 of white reflectance coating radiation plays reflex, prevents the consumption of heat;
Described white reflectance coating coating used is preferably tin oxide;
In gap, 5 adopt ceramic-seal ring 7 seals with screwed joint near mozzle 1 bottom, and ceramic-seal ring 7 bottoms protrude from the bottom of metal-coating 3.
Application Example 1
The described a kind of application of atomizer in the preparation of superfine metal aluminium powder that prevents that nozzle and mozzle from stopping up of embodiment 1, concrete grammar is as follows:
The assembling of atomizer
At first the gap 131 and 132 interior installation heater B111 and the B112 that at escape pipe 101 and 102 places of two Laval structures of nozzle, arrange, at the escape pipe 101 near two laval structures of nozzle, with 102 gap 131, with 132 end, adopt metallic packing ring 121 to be connected with 122 thread seals afterwards, after installation, assurance metallic packing ring 121 and 122 bottom protrude from the escape pipe 101 of two laval structures of nozzle and 102 bottom;
Then in metal-coating 3 the insides, heater A4 is installed; Put into mozzle 1 in heater A4 inboard subsequently; Finally at metal-coating 3 and mozzle 1 lower end, load onto ceramic-seal ring 7, thereby complete the installation of atomizer;
Utilize above-mentioned a kind of atomizer that prevents that nozzle and mozzle from stopping up to come atomization to prepare metallic aluminium powder, after being about to the metal-coating 3 of above-mentioned atomizer and pipeline on the melt stove being connected, can be produced, the situation that metallic aluminium blocks just in case occur in nozzle and mozzle in production process, heating switches on power, the phenomenon that metal stops up does not appear in nozzle and exit, mozzle bottom as a result, and can produce continuously the whole year, flour extraction and production efficiency have greatly been improved.
From the above results, can find out, with existing atomizer, compare, a kind of use of atomizer in the preparation of metal or alloy ultra-micro powder that prevents that nozzle and mozzle from stopping up of the present invention not only can solve the obstructing problem of metal or alloy, and be conducive to the more acquisition of small particle diameter and narrower size distribution powder granule, thereby reduced the loss of material, saved material, reduced production cost, also improve the quality of product, improved production efficiency.
Foregoing is the basic explanation under conceiving for the present invention only, 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 prevents that nozzle and mozzle from stopping up, comprise mozzle, nozzle, metal-coating, heater A, ceramic-seal ring;
The upper end core of described metal-coating has the hole adapted with the mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered, and mozzle is concentric with metal-coating;
Be provided with the gap of 10mm ~ 100mm between mozzle and metal-coating, heater A is installed in gap;
Gap location in metal-coating and mozzle bottom adopts the ceramic-seal ring seal with screwed joint, and the ceramic-seal ring bottom protrudes from the metal-coating bottom;
Characterized by further comprising a packing ring, described packing ring is placed in the groove of the recessed portion that the lower edge of the upper end of mozzle is provided with and the upper end of metal-coating is being provided with in the groove of corresponding recessed portion near on the corresponding position, edge of internal diameter, and the mozzle bottom is concordant with the metal-coating bottom when guaranteeing to install;
And described nozzle is provided with the escape pipe of two air inlet pipe and two Laval structures, and the angle between the axis of the escape pipe of two Laval structures of described nozzle is between 20 ° ~ 75 °;
Wherein the peripheral 10mm of the escape pipe of each laval structure ~ 100mm place arranges gap, heater B all is installed in gap, and the end in the gap of the escape pipe of each Laval structure adopts the metallic packing ring seal with screwed joint, the metallic packing ring bottom protrudes from nozzle escape pipe bottom;
Be respectively equipped with external power interface on described heater A and heater B and be connected with extraneous power supply.
2. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 1, is characterized in that being provided with near the inner surface of heater A one deck white reflectance coating that metallic reflective coating or spraying form at metal-coating.
3. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 2, is characterized in that it is tin oxide that described white reflectance coating sprays coating used.
4. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 3, is characterized in that described heater A or heater B are electric furnace heating wire or silicon carbon rod.
5. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 4, is characterized in that described ceramic-seal ring material selection zirconyl phosphate ceramics or aluminum phosphate pottery.
6. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 5, is characterized in that described metal-coating, metallic packing ring adopt carbon steel or stainless steel.
7. a kind of atomizer that prevents that nozzle and mozzle from stopping up as claimed in claim 6, is characterized in that described packing ring adopts plastics or quoit sheet.
8. the described a kind of atomizer that prevents that nozzle and mozzle from stopping up of claim as arbitrary as claim 1 ~ 7, is characterized in that described mozzle material selection aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics.
9. the described a kind of atomizer that prevents that nozzle and mozzle from stopping up of claim as arbitrary as claim 1 ~ 7 carrys out the application of atomization in preparing the metal or alloy ultra-micro powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100487155A CN102528060B (en) | 2012-02-29 | 2012-02-29 | Atomizer capable with nozzle and flow guide tube prevented from blockage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100487155A CN102528060B (en) | 2012-02-29 | 2012-02-29 | Atomizer capable with nozzle and flow guide tube prevented from blockage |
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| CN102528060A CN102528060A (en) | 2012-07-04 |
| CN102528060B true CN102528060B (en) | 2013-12-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105710321B (en) * | 2016-04-20 | 2018-01-05 | 包头市科锐微磁新材料有限责任公司 | A kind of neodymium iron boron fast melt-quenching stove nozzle flow-guiding bar |
| CN107020383B (en) * | 2017-05-16 | 2018-05-15 | 深圳微纳增材技术有限公司 | It is used to prepare the tundish and its jetting method, vacuum melting furnace of metal dust |
| CN109806988B (en) * | 2019-04-13 | 2023-10-03 | 江苏华威机械制造有限公司 | Molten metal jet deposition atomizer capable of preventing nodulation and nozzle blockage |
| CN111390174B (en) * | 2020-04-16 | 2022-05-03 | 广东明路电力电子有限公司 | 3D printing metal spraying equipment, 3D printing device and control method thereof |
| CN114589311B (en) * | 2022-03-16 | 2023-07-25 | 季华实验室 | Aluminum alloy melt flow control device and control method thereof |
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| CN1511663A (en) * | 2002-12-30 | 2004-07-14 | 北京有色金属研究总院 | Method and device for reducing heat loss of metal atomizing flow guide system |
| JP2004317096A (en) * | 2003-04-21 | 2004-11-11 | Daido Steel Co Ltd | Metal melting and atomizing apparatus |
| 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 |
| CN201693177U (en) * | 2010-07-06 | 2011-01-05 | 河南省远洋铝业有限公司 | Atomizing nozzle for preparing metal superfine powder |
| CN202498211U (en) * | 2012-02-29 | 2012-10-24 | 上海应用技术学院 | Atomizer with nozzle and honeycomb duct prevented from being blocked |
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- 2012-02-29 CN CN2012100487155A patent/CN102528060B/en active Active
Patent Citations (5)
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| CN1511663A (en) * | 2002-12-30 | 2004-07-14 | 北京有色金属研究总院 | Method and device for reducing heat loss of metal atomizing flow guide system |
| JP2004317096A (en) * | 2003-04-21 | 2004-11-11 | Daido Steel Co Ltd | Metal melting and atomizing apparatus |
| 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 |
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Application publication date: 20120704 Assignee: SHANGHAI LUOKE CENTRAL CONTROLLED ENERGY-SAVING TECHNOLOGY CO., LTD. Assignor: Shanghai Institute of Technology Contract record no.: 2015310000074 Denomination of invention: Atomizer capable with nozzle and flow guide tube prevented from blockage Granted publication date: 20131204 License type: Exclusive License Record date: 20150707 |
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Address after: 201400, Shanghai, Fengxian District, South Bridge, South Pavilion Road 303, building 301, room 1 Patentee after: SHANGHAI LUOKE CENTRAL CONTROLLED ENERGY-SAVING TECHNOLOGY CO., LTD. Address before: 200235 Xuhui District, Caobao Road, No. 120, Patentee before: Shanghai Institute of Technology |