CN102554246B - Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material - Google Patents
Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material Download PDFInfo
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Abstract
The invention discloses a totally-enclosed gas-atomizing powder preparation device for solving blockage of a nozzle and a liquid guiding pipe caused by a high-melting-point material. The totally-enclosed gas-atomizing powder preparation device consists of a heat-preserving crucible, an atomizer, an atomizing tower, a retractable plastic pipe A, a retractable plastic pipe B, a vacuum pump and the like, wherein the atomizer is installed in the retractable plastic pipe A, the retractable plastic pipe A is hermetically connected with the heat-preserving crucible and the upper surface of a nozzle of the atomizer, and the retractable plastic pipe B is hermetically connected with the atomizing tower and the lower surface of the nozzle, so that a totally-enclosed system structure, which can prevent the high-melting-point material from being generated on the atomizer, is formed; a gap is maintained between the liquid guiding pipe and a metal outer sleeve and used for installing a heating element A, and a heating element B is installed in a gap between the air outlet pipes of two Laval structures of the nozzle, so that the heating element A and the heating element B can be used for solving the problem of blockage caused by the high-melting-point material when being simultaneously powered on. The totally-enclosed gas-atomizing powder preparation device for solving the blockage of the nozzle and the liquid guiding pipe caused by the high-melting-point material, provided by the invention, has the advantages that the structure is simple, the installation is convenient, the blocking problem can be effectively avoided and solved, the powder quality can be improved and the like.
Description
Technical field
The present invention relates to and manufacture ultra-fine powder technology field with atomizing molten materials with gases, is more particularly a kind of metal or alloy ultra-micro powder a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances and block used when preparing.
Background technology
Along with the development of modern science and technology, more and more higher to the requirement of the kind of dusty material, the aspect such as quality and cost, the preparation of metal dust is towards high-purity, fine, composition and granularity is controlled and the future development of low cost.Gas atomization techniques is the main method of producing metal and alloy powder, and the general principle of gas atomization with a high velocity air liquid metal stream is ground into droplet and is frozen into the process of powder.What vacuum atomizing powder process adopted is the metal or metal alloy that melting under vacuum obtains; when they reach certain degree of superheat; proceed in insulation crucible (tundish) after being incubated reasonable time again; under the condition of gas shield; these metal liquids flow out through mozzle, by high-pressure inert gas stream, metal liquid atomization is broken into drop tiny in a large number by nozzle, and these tiny drops are frozen into spherical or sub-spheric granules awing.Because drop is tiny and heat exchange conditions is good, the condensation rate of drop generally can reach 100 ~ 10000K/s, and the several order of magnitude higher than the cooling of ingot casting, therefore metal powder particles is tiny, the uniform composition of alloy, fine microstructures.Vacuum atomizing powder process not only can prepare great majority can not adopt the metal and alloy powder thereof that manufacture with water atomization process in atmosphere, and the spherical or sub-spherical powder of many specific alloys can be produced, have that sphericity is high, powder size is controlled, oxygen content is low, production cost is low and adapt to the advantage such as production of various metals and alloy powder, amorphous phase, become the main development direction of high-performance and special alloy powder preparation technology.
In prior art, atomizer in use often runs into the phenomenon appearance of mozzle blocking, and this reason primarily of the following aspects causes:
One is that molten metal occurs solidifying because temperature reduces in flow process; Two be nozzle injection air-flow can be ejected into more or less mozzle port produce cool consumingly, liquid stream is solidified and blocks mozzle and nozzle; Three is the negative pressure turbulent regions below mozzle, makes molten drop splash jet hole and causes and block; Four is because molten drop occurs backwash in atomization process, namely the drop be atomized flies to the direction of 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 block and atomization process is interrupted; Five is that gas atomization is often in oxidizing atmosphere when preparing alloy powder, and alloy powder surface certainly will be made to be oxidized; Even if under being in protective atmosphere; but due to protective gas and non-fully is pure; therefore alloy powder surface is also unavoidably made to occur to a certain degree to be oxidized; oxide thin layer film is formed at powder surface; once oxide-film forms certain thick layer; Surface Tension of Liquid Drops is entirely ineffective, affects the balling ratio of powder.Along with increasing of compound amount, can by nozzle and mozzle blocking.Once nozzle and mozzle blocking, production cannot proceed.When there is this situation, the general way of enterprise stops producing, and atomizer is pulled down dredging, but this way usually can not be dealt with problems, this is mainly general higher due to these high-melting-point substances fusing points, in this case, only has and changes mozzle and even whole atomizer.But also there is two problems in the method changed, one is the intrusion running into oxygen in air, nitrogen and other gas in Renewal process unavoidably, and they can be oxidized, metal nitride, have impact on product quality, and two are reduction of efficiency, add production cost.
At present, carrying out improving the technology upgraded to atomizer has a lot, but seldom has the patent and the technology that block especially oxide, nitride or other high-melting-point substances blockage problem about the nozzle and mozzle that how to solve atomizer.The present inventor is a kind of totally-enclosed gas atomization pulverization device preventing high-melting-point substances from blocking in denomination of invention, the patent No. is refer to a kind of problem solving atomizer high-melting-point substances plug nozzle and mozzle in 201110452318.x patent application, but still exist because jet expansion and the spacing of atomization point are long thus affect and be atomized the technical problem that powder reaches desired comminution effect, but shortening jet expansion and the distance between being atomized then easily cause nozzle and mozzle to block.And this technical problem the technical problem to be solved in the present invention just.
Summary of the invention
Object of the present invention provides a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances and block to solve above-mentioned technical problem, and it can solve the problem that the nozzle of atomizer and mozzle metal block especially oxide, nitride or other high-melting-point substances blocking effectively.
Technical scheme of the present invention
Solve a totally-enclosed gas atomization pulverization device for nozzle and mozzle high-melting-point substances obstruction, comprise insulation crucible, atomizer, scalable plastic tube A, atomisation tower, scalable plastic tube B and vavuum pump etc.;
Wherein said atomizer comprises mozzle, nozzle, also comprises metal-coating, heater, ceramic annulus, metal ring, metallic packing ring and packing ring etc. in addition;
Described nozzle is provided with the escape pipe of two air inlet pipe and two Laval structures;
Angle between the axis of the escape pipe of two Laval structures of described nozzle is between 20 ° ~ 75 °;
Peripheral 10mm ~ 100mm place of the escape pipe of each laval structure arranges gap, in gap, heater B is all installed, the end in the gap of the escape pipe of each Laval structure adopts metallic packing ring seal with screwed joint, the end at the gas outlet place of the escape pipe of each Laval structure is connected with metal ring, described metal ring internal diameter is according to the escape pipe of laval structure, and the outer radius of metal ring adopts with the end of escape pipe and is threaded;
The upper end center sections of described metal-coating divides the hole having and adapt with mozzle external diameter, and in order to install mozzle, the lower end of metal-coating is uncovered, and when metal-coating is installed, mozzle is concentric with metal-coating;
The lower edge of the upper end of described mozzle and the upper end of metal-coating are at the groove being provided with corresponding recessed portion on the position that the edge of internal diameter is corresponding, place the packing ring played the role of positioning inside groove, the bottom of final guarantee mozzle is concordant with the bottom of metal-coating;
Described packing ring adopts plastics or metal washer;
There is the gap of 10mm ~ 100mm between mozzle and metal-coating, in gap, heater A is installed; Mozzle does not directly contact with metal-coating, can prevent the conduction between heater A and metal-coating on the one hand, greatly can reduce scattering and disappearing of mozzle heat on the other hand;
Described heater A and heater B is equipped with external power interface and is connected with extraneous power supply, in case when there is metal or low melting point blocking during atomizer uses, be energized by heater A and heater B simultaneously, its fusing that heats up is made to tamper heating, thus reaches the object solving metal or alloy blocking; Described extraneous power supply is 220V or 380V power supply;
In addition, to be preferably provided with at metal-coating the reflecting layer that metallic reflective coating or spraying one deck white reflective coating formed near the surface of heater A, to be used to the energy reflecting heater A radiation, thus reach and reduce the energy-conservation effect of energy loss; The coating that described white reflective coating is used is preferably tin oxide;
Described ceramic annulus and mozzle uniform internal diameter, the external diameter of ceramic annulus is less than metal-coating bottom internal diameter, and there is a boss at the edge in the inner footpath of ceramic annulus, and this boss structure matches with the recessed portion of mozzle bottom;
Pottery annulus is installed to the bottom of mozzle and is embedded in metal-coating; the boss of pottery annulus is embedded on the recessed portion of mozzle bottom; pottery annulus adopts with metal-coating and is threaded; after installing, ensure that another side corresponding with there being boss one side on ceramic annulus will protrude from the lower surface of metal-coating;
The upper material with often occurring to block of inner surface spraying of pottery annulus, as metal, alloy molten solution, metal oxide or metallic compound are difficult to the material of adhesion, what be used for preventing oxide or other compound at circular body surface solidifies accumulation, thus reaches the object preventing from blocking, solve blocking; The selection of inner surface spraying substance, will, according to different atomization metal, adopt the methods such as angle of wetting to determine;
Described mozzle, metal-coating, ceramic annulus, metallic packing ring, metal ring according to atomization metal or alloy powder difference, can select different materials;
Even if described mozzle can select 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, as aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics, silicon carbide ceramics and other refractory ceramics;
Described metal-coating, metallic packing ring, metal ring can selection intensity high, be easy to process, inexpensive material, as carbon steel or stainless steel.
Described ceramic annulus selects aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics;
Described heater A and heater B is different according to atomization metal or alloy powder, optional electric furnace heating wire or silicon carbon rod, and they are played a role by the mode installed or be wound around;
Above-mentioned scalable plastic tube A one end is tightly connected with insulation crucible one end, the upper surface of the nozzle of the other end and atomizer is tightly connected, atomisation tower is connected by scalable plastic tube B with outside the gas outlet of the escape pipe of two Laval structures of the nozzle of the lower surface of nozzle, scalable plastic tube A bottom is provided with vacuum pump interface near the position of nozzle, external vavuum pump, the drain hole valve that atomisation tower bottom is provided with and atomisation tower valve, namely formed by insulation crucible, scalable plastic tube A, nozzle, scalable plastic tube B, atomisation tower, the totally-enclosed system architecture formed together with atomisation tower valve and the vavuum pump that connects with scalable plastic tube A,
Described vavuum pump is conventional vacuum system, comprises all kinds of mechanical pump, diffusion pump, molecular pump etc.;
Inner at scalable plastic tube A, the insulation crucible one end be connected with scalable plastic tube A, it is connected with insulation crucible valve, to use when above-mentioned totally-enclosed system architecture inside vacuumizes by pipeline;
To be the pipeline of loudspeaker flat mouth again through one end with the upper port of the mozzle of atomizer be close to by bolt and packing ring insulation crucible valve is connected, and they are all placed in the inside of scalability plastic tube A;
Be provided with at scalable plastic tube A getting thing mouth A near mozzle place, scalable plastic tube B between spray tower and nozzle lower surface is provided with near the position of the ceramic annulus of atomizer, metal ring and metallic packing ring and gets thing mouth B, to facilitate exchanging for of article inside and outside closed system;
On described scalable plastic tube A get on thing mouth A and scalable plastic tube B to get thing mouth B structure identical, be respectively equipped with two layers of vacuum valve, i.e. internal layer vacuum valve and outer vacuum valve, outer vacuum valve on it adopts vacuum rubber pipe to be connected with extraneous multiple-pass joint, and the vavuum pump that the latter is connected near the position of nozzle with above-mentioned scalable plastic tube A bottom is again connected;
In addition, the upper limb place that namely thing mouth A both sides correspond to bolt and metal-coating of getting on scalable plastic tube A is respectively provided with pair of glove, and to facilitate the mozzle to atomizer, metal-coating operates; Getting on position corresponding to thing mouth B both sides at scalable plastic tube B, is also provided with two both hands covers, is used for ceramic annulus, metal ring, metallic packing ring, two and half are foretold to round metal cylindrical barrel and operated;
Above-mentioned each gloves adopt adhesive to be connected with scalable plastic tube A and scalable plastic tube B respectively;
When getting article from full-closed system, first article being placed in the space between two valves, closing internal layer vacuum valve subsequently, opening outer vacuum valve, pulling items; And when article are put in totally-enclosed system, first open outer vacuum valve, article are put in the space between internal layer vacuum valve and outer vacuum valve, subsequently to this evacuate space, after reaching vacuum, stop bleeding, open internal layer vacuum valve, article are put in totally-enclosed system;
And when mozzle exchanged by needs (as mozzle year ftractures for a long time), by stretching scalable plastic tube, in closed system, unloading bolt, mentioning metal-coating, take off mozzle, and exchange by getting thing mouth A; When mozzle is installed, first in closed system, load onto mozzle, load in metal-coating subsequently, use bolt fixing metal overcoat subsequently, complete mozzle and exchange;
And (block as there is high-melting-point substances) when ceramic annulus exchanged by needs, first by the gloves on scalable plastic tube B, utilize the slip on inside and outside two metallic channels of two and half fore-telling round metal cylindrical barrel on atomizer nozzle and atomisation tower, open the internal structure of round metal cylindrical barrel, utilize gloves subsequently, screw off the ceramic annulus on atomizer, and exchanged by the thing mouth B that gets on scalable plastic tube B; When ceramic annulus is installed, first ceramic annulus is put into scalable plastic tube B by the thing mouth B that gets on scalable plastic tube B, then install the ceramic annulus on atomizer.
Described scalable plastic tube A and scalable plastic tube B, its material adopts high-temperature resistance plastice, glass fibre as coated in its inside, middle employing stainless steel elastic helix steel wire reinforcement, the outside scalable exotic material being Polypropylence Sheet and being formed, as high-temperature nylon extension flexible ventilation ducting.Adopt scalable plastic tube A, conveniently under closed environment, atomizer is processed.
Above-mentioned a kind of installation process solving the totally-enclosed gas atomization pulverization device that nozzle and mozzle high-melting-point substances block is as follows:
First in the gap of the escape pipe of two Laval structures of nozzle, heater B is all installed, all metallic packing ring is installed in the end in the gap of the escape pipe of two Laval structures of nozzle afterwards, all metal ring is installed in the end at the gas outlet place of the escape pipe of two Laval structures of nozzle subsequently;
Then heater A is installed inside metal-coating;
Mozzle is put into subsequently, the center of mozzle and the center superposition of metal-coating, afterwards at exit, mozzle bottom placing ceramic annulus inside heater A;
Then above-mentioned atomizer is put into scalable plastic tube A, afterwards scalable plastic tube A is arranged between insulation crucible and nozzle;
On scalable plastic tube A, gloves are installed subsequently, get thing mouth A, heater A external power interface etc.;
Then outside the gas outlet of the escape pipe of two Laval structures of the lower surface nozzle of nozzle and inside and outside two metallic channels and two and half are installed between spray tower foretell round metal cylindrical barrel;
Finally between the lower surface and spray tower of nozzle, scalable plastic tube B etc. is installed, thus completes a kind of totally-enclosed gas atomization pulverization device installation solving nozzle and mozzle high-melting-point substances obstruction.
The above-mentioned a kind of application process of totally-enclosed gas atomization pulverization device in metal and alloy pulverizing process solving nozzle and mozzle high-melting-point substances obstruction, specific as follows:
Due to a kind of improvement solving the totally-enclosed gas atomization pulverization device of nozzle and mozzle high-melting-point substances obstruction of the present invention, in equipment use process, first insulation crucible valve and atomisation tower valve is closed, then with vavuum pump, process is vacuumized to scalable plastic tube A and scalable plastic tube B, after being extracted into suitable vacuum, put into inert gas, when in scalable plastic tube A and scalable plastic tube B, pressure is superatmospheric time, open atomisation tower valve, open insulation crucible valve subsequently and put into metal bath, carry out powder atomization process.If time period, nozzle, the mozzle blocking of atomizer occurred, or change nozzle or mozzle or opening power, utilize heater A and heater B to heat-treat blocking metal simultaneously, impel it melt, the blockage problem of solution mozzle and nozzle.Just in case when heat-treating methods does not prove effective, then by scalable plastic tube B gets two layers of vacuum valve that thing mouth B is provided with above, exchange metal ring and ceramic annulus.
Technique effect of the present invention
A kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction of the present invention, by changing the structure of atomizer, while heater A is installed in the gap between mozzle and metal-coating, also in the gap of the escape pipe of two Laval structures of nozzle, heater B is all installed, by heating simultaneously, effectively can eliminate the low melting point tamper that metal or alloy is formed, can also preheating atomization gas and insulation effect is played to molten metal, the cooled and solidified produced in the flow process that can effectively prevent molten metal from causing because of reasons such as Changes in weather, thus the phenomenon avoiding nozzle and mozzle bottom to block making atomization continue occurs.In addition, adopt while heater A and heater B, the interference of low melting point tamper can be eliminated, the rum point being therefore conducive to shortening air-flow and liquid stream to mozzle bottom distance and keep the speed of air-flow, this is highly beneficial for obtaining more small particle diameter and narrower size distribution powder granule.
Of the present inventionly a kind ofly solve in the totally-enclosed gas atomization pulverization device that nozzle and mozzle high-melting-point substances block; because atomizer adopts closed system; the intrusion of oxygen, nitrogen or other gas in atomizer unloading process can be avoided, the loss of the product quality that the shutdown caused the blocking of nozzle and even mozzle after preventing the generation of the high-melting-point substances such as oxide, nitride brings and economic aspect.
At present, carrying out improving the technology upgraded to atomizer has a lot, and thus existing gas atomization pulverization device structure is numerous, different.Compared with existing atomizer, atomizer provided by the invention belongs to a kind of whole closing appliance solving nozzle and mozzle high-melting-point substances obstruction, not only can get rid of the generation of mozzle mouth of pipe oxide, nitride and other high-melting-point substances, and eliminate the low melting point tamper of metal or alloy formation by heating.
A kind ofly solve in the totally-enclosed gas atomization pulverization device that nozzle and mozzle high-melting-point substances block provided by the invention, major part parts adopt metal material manufacture, not only cheap, easy to process, reusable, and mozzle is concordant with metal-coating end, can prevent mozzle end and high speed cold air flow contacts, mozzle heating status is significantly improved, thermal shock resistance improves, and not easily bursts.Due to the protection of metal-coating, mozzle security performance improves, the phenomenon appearance not easily fractureing or damage.
A kind ofly solve in the totally-enclosed gas atomization pulverization device that nozzle and mozzle high-melting-point substances block provided by the invention, gap is left between mozzle and metal-coating, metal-coating internal layer is provided with white reflecting layer, metal-coating does not contact with nozzle, area of dissipation reduces, and mozzle does not directly contact high speed cold air-flow, and these measures are conducive to the insulation of mozzle, significantly can keep the temperature of melt, reduce the melt atomization degree of superheat and reduce the danger blocked; Even if when melt overheat degree is less cause mozzle temperature not high, heater energy also can be adopted to keep the temperature of melt, therefore heater use for reduce atomization the degree of superheat provide guarantee.The reduction of melt overheat degree, effectively can weaken the reaction between melt and mozzle, alleviates composition and pollutes, improve the quality of powder.
As can be seen here, it is simple that a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction of the present invention has structure, easy processing, easy to use, cost is low, can repeatedly use, and anti-clogging, dredge blockage are effective, can greatly save as dredging or the work changing mozzle, production efficiency improves.
Accompanying drawing explanation
Fig. 1, solve the contour structures schematic diagram of the totally-enclosed gas atomization pulverization device of nozzle and mozzle high-melting-point substances obstruction, in picture in picture: 1 is insulation crucible, 2 for getting thing mouth A, 3 is scalable plastic tube A, 4 is gloves I, 5 is the heater A external power interface I of atomizer, 6 is gloves II, 7 is vacuum pump interface, 8 is the nozzle of atomizer, 9 is the air inlet pipe of the nozzle of atomizer, 10 is gloves III, 11 is the heater B external power interface I of atomizer, 12 is gloves IV, 13 for getting thing mouth B, 14 is atomisation tower, 15 is atomisation tower valve, 16 is gloves V, 17 is the heater A external power interface II of atomizer, 18 is gloves VI, 19 is gloves VII, 20 is the heater B external power interface II of atomizer, 21 is gloves VIII, 22 is scalable plastic tube B,
The structural representation getting thing mouth A2 on Fig. 2, scalable plastic tube A, in figure, A21 is internal layer vacuum valve, A22 is inner space, A23 is outer vacuum valve, A24 is outer space, A25 is vacuum pump interface, and 3 is scalable plastic tube A;
Fig. 3, solve the local, inside of the totally-enclosed gas atomization pulverization device of nozzle and mozzle high-melting-point substances obstruction and the cutting structural representation of nozzle, in figure, 1 is insulation crucible, 3 is scalable plastic tube A, 4 is gloves I, 5 is heater A external power interface I, 6 is gloves II, 8 is the nozzle of atomizer, 9 is the air inlet pipe of the nozzle of atomizer, 10 is gloves III, 11 is heater B external power interface I, 12 is gloves IV, 14 is atomisation tower, 15 is atomisation tower valve, 16 is gloves V, 17 is the external power interface II of heater A, 18 is gloves VI, 19 is gloves VII, 20 is heater B external power interface II, 21 is gloves VIII, 22 is scalable plastic tube B, 23 is insulation crucible valve, 24 is pipeline, 25 is mozzle, 26 is bolt, 27 is packing ring, 28 is metal-coating, 29 is heater A, 30 is the space between metal-coating and mozzle, 31 is reflecting layer, 32 is ceramic annulus, 331 and 332 is the gap of the escape pipe of two Laval structures of nozzle, 341 and 342 is heater B, 351 and 352 is the escape pipe of two Laval structures of nozzle, 361 and 362 metallic packing rings, 37 is round metal cylindrical barrel, 381 and 382 is metal ring,
Fig. 4, a kind of structural representation enlarged drawing solving the escape pipe of right side nozzles, heater, metallic packing ring and metal ring in the atomizer of nozzle and the blocking of mozzle high-melting-point substances of the present invention, 331 is the gap of the escape pipe of nozzle, 341 is heater B, 351 is the escape pipe of the Laval structure of nozzle, 361 is metallic packing ring, and 381 is metal ring.
Detailed description of the invention
Below by embodiment, also the present invention is described in further detail by reference to the accompanying drawings, but do not limit the present invention.
embodiment 1
A kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction, its appearance schematic diagram as shown in Figure 1, in picture in picture: 1 is insulation crucible, 2 for getting thing mouth A, 3 is scalable plastic tube A, 4 is gloves I, 5 is the heater A external power interface I of atomizer, 6 is gloves II, 7 is vacuum pump interface, 8 is the nozzle of atomizer, 9 is the air inlet pipe of the nozzle of atomizer, 10 is gloves III, 11 is the heater B external power interface I of atomizer, 12 is gloves IV, 13 for getting thing mouth B, 14 is atomisation tower, 15 is atomisation tower valve, 16 is gloves V, 17 is the heater A external power interface II of atomizer, 18 is gloves VI, 19 is gloves VII, 20 is the heater B external power interface II of atomizer, 21 is gloves VIII, 22 is scalable plastic tube B.
The above-mentioned thing mouth A2 that gets is provided with two layers of vacuum valve, and as shown in Figure 2, in figure, A21 is internal layer vacuum valve to structural representation, and A22 is inner space, and A23 is outer vacuum valve, and A24 is outer space, and A25 is vacuum pump interface;
When getting article from full-closed system, first article being placed in the space between internal layer vacuum valve A21 and outer vacuum valve A23, closing internal layer vacuum valve A21 subsequently, opening outer vacuum valve A23, pulling items;
And when article are put in totally-enclosed system, first open outer vacuum valve A23, article are put in the space between internal layer vacuum valve A21 and outer vacuum valve A23, subsequently to this evacuate space, after reaching vacuum, stopping is bled, and opens internal layer vacuum valve A21, is put into by article in totally-enclosed system;
The above-mentioned structure of getting thing mouth B13 is with getting the structure of thing mouth A2, and its process of getting thing and putting article into is as got the operation of thing mouth A2.
Solve a totally-enclosed gas atomization pulverization device for nozzle and mozzle high-melting-point substances obstruction, as shown in Figure 3, in figure, 1 is insulation crucible to the cutting structural representation of its inner local and nozzle, 3 is scalable plastic tube A, 4 is gloves I, 5 is heater A external power interface I, 6 is gloves II, 8 is the nozzle of atomizer, 91 and 92 is the air inlet pipe of the nozzle of atomizer, 10 is gloves III, 11 is heater B external power interface I, 12 is gloves IV, 14 is atomisation tower, 15 is atomisation tower valve, 16 is gloves V, 17 is the external power interface II of heater A, 18 is gloves VI, 19 is gloves VII, 20 is heater B external power interface II, 21 is gloves VIII, 22 is scalable plastic tube B, 23 is insulation crucible valve, 24 is pipeline, 25 is mozzle, 26 is bolt, 27 is packing ring, 28 is metal-coating, 29 is heater A, 30 is the space between metal-coating and mozzle, 31 is reflecting layer, 32 is ceramic annulus, 331 and 332 is the gap of the escape pipe of two Laval structures of nozzle, 341 and 342 is heater B, 351 and 352 is the escape pipe of two Laval structures of nozzle, 361 and 362 metallic packing rings, 37 is round metal cylindrical barrel, 381 and 382 is metal ring.
Composition graphs 1 and Fig. 3 can find out, the scalable plastic tube A3 being provided with atomizer is tightly connected with insulation crucible 1 one end, and the other end and nozzle 8 upper surface are tightly connected;
Atomisation tower 14 is connected with scalable plastic tube B22 with outside the escape pipe 351 and 352 of two Laval structures of the nozzle of the lower surface of nozzle 8; the vacuum pump interface that scalable plastic tube A3 bottom is provided with near the position of nozzle 8; external vavuum pump (not marking in figure); the drain hole valve that atomisation tower 14 bottom is provided with and atomisation tower valve 15, namely formed by the totally-enclosed system architecture formed together with insulation crucible 1, scalable plastic tube A3, nozzle 8, scalable plastic tube B22, atomisation tower 14, atomisation tower valve 15 and the vavuum pump that connects with scalable plastic tube A3;
Described vavuum pump is mechanical pump;
In the inside of scalable plastic tube A3, insulation crucible 1 one end be connected with scalable plastic tube A3, it is connected with insulation crucible valve 23 by pipeline 24; Insulation crucible valve 23 is connected with one end of pipeline 24, and other one end of pipeline 24 is loudspeaker flat mouth structure;
The upper end flat mouth of the mozzle 25 of atomizer makes the loudspeaker flat mouth end of itself and pipeline 24 be close to by bolt 26 to be tightly connected by metal-coating 28;
In addition, scalable plastic tube A3 corresponds to bolt 26 and scalable plastic tube B22 and on the position of getting the corresponding metallic packing ring 36 of thing mouth B13, is respectively provided with two pairs of plastics thin type gloves is respectively 4 in figure, 6,10,12,16,18,19,21 getting thing mouth A2, they adopt adhesive to be connected on scalable plastic tube A3 or scalable plastic tube B22 respectively, in order to bolt 26, mozzle 25, metal-coating 28, get thing mouth A2, get thing mouth B13, ceramic annulus 32, metallic packing ring 36, round metal cylindrical barrel 37 etc. and operate;
The nozzle 8 of atomizer is provided with the escape pipe 351 and 352 of two air inlet pipe 91 and 92 and two Laval structures;
Angle between the escape pipe 351 of two Laval structures and the axis of 352 is between 20 ° ~ 75 °, peripheral 10mm ~ 100mm place of the escape pipe 351 and 352 of two laval structures arranges gap 331 and 332, in gap 331 and 332, heater B341 and B342 is installed, the escape pipe 351 of two laval structures and the gap 331 of 352 with 332 end adopt metallic packing ring 361 to be connected with 362 thread seals, the escape pipe 351 of two Laval structures is all connected with metal ring 381 and 382 with the end at the gas outlet place of 352, the internal diameter of described metal ring 381 and 382 is according to the escape pipe 351 and 352 of laval structure, the outer radius of metal ring 381 and 382 adopts with the end of escape pipe 351 and 352 and is threaded, specifically see Fig. 4, namely with the escape pipe 331 of right side nozzles in atomizer, heater B341, the structural representation enlarged drawing of metallic packing ring 361 and metal ring 381 is that example is described, wherein 331 is the escape pipe gap of nozzle, 341 is heater B, 351 is the escape pipe of two Laval structures of nozzle, 361 is metallic packing ring, 381 is metal ring,
The upper end center sections of metal-coating 28 divides the hole having and adapt with mozzle 25 external diameter, and in order to install mozzle 25, the lower end of metal-coating 28 is uncovered;
Make mozzle 25 concentric with metal-coating 28 during installation, the packing ring 27 played the role of positioning is placed, to ensure that the bottom of mozzle 25 is concordant with the bottom of metal-coating 28 in the lower edge of the upper end of described mozzle 25 and the upper end of metal-coating 28 are provided with the groove of corresponding recessed portion the inside at the edge near internal diameter;
Mozzle 25 does not directly contact with metal-coating 28, between have the gap 30 of 10mm ~ 500mm, in gap 30, heater A29 is installed;
Described heater A29 is provided with external power interface 5 and is also connected with extraneous power supply through scalable plastic tube A4 with 17;
Described heater B341 and 342 is provided with external power interface 11 and is also connected with extraneous power supply through scalable plastic tube B22 with 20;
Described extraneous power supply is 220V or 380V power supply;
In addition, to be provided with at metal-coating 28 reflecting layer 31 that metallic reflective coating or spraying one deck white reflective coating formed near the surface of heater A29, described white reflective coating 31 coating used is tin oxide;
Ceramic annulus 32 is adopted to seal at metal-coating 28 and the bottom, gap 30 of mozzle 25 bottom;
Pottery annulus 32 adopts aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or thyrite, pottery annulus 32 and mozzle 25 uniform internal diameter, the external diameter of pottery annulus 32 is less than metal-coating 28 bottom internal diameter, there is a boss at the edge in the pottery inner footpath of annulus 32, and this boss structure matches with the recessed portion of mozzle 25 bottom;
Atomisation tower 14 and nozzle 8 lower surface are tightly connected by scalable plastic tube B22, two and half foretell round metal cylindrical barrel 37 is placed in inside and outside two metallic channels on nozzle 8 lower surface and atomisation tower 14 respectively, is placed in the metallic channel on nozzle 8 lower surface and atomisation tower 14 up and down respectively;
Described mozzle 25 selective oxidation aluminium pottery;
Described metal-coating 28 and metallic packing ring 361 and 362 select stainless steel;
The mode that described heater A29 and heater B341 and 342 selects electric furnace heating wire to be wound around plays a role;
Described scalable plastic tube A3 and scalable plastic tube B22 adopts high-temperature nylon extension flexible ventilation ducting.
Described gloves are plastics thin type gloves.
Adopt a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction provided by the invention to be atomized and prepare metallic aluminium powder, there is not the phenomenon that aluminium oxide blocks in nozzle and the mozzle mouth of pipe, the whole year can continuous seepage.Compared with existing powder by atomization device, the totally-enclosed powder by atomization device preventing nozzle and mozzle high-melting-point substances from blocking provided by the invention, the nozzle of atomizer and the low melting point tamper of mozzle mouth of pipe oxide, nitride and other high-melting-point substances blockage problem and the formation of elimination metal or alloy can be solved, realize continuous seepage, reduce cost, improve product quality and production efficiency.
Foregoing be only the present invention conceive under basic explanation, and according to any equivalent transformation that technical scheme of the present invention is done, all should protection scope of the present invention be belonged to.
Claims (14)
1. solve a totally-enclosed gas atomization pulverization device for nozzle and mozzle high-melting-point substances obstruction, comprise insulation crucible, mist
Change tower, atomizer, scalable plastic tube A, scalable plastic tube B and vavuum pump;
Wherein said atomizer comprises mozzle, nozzle, metal-coating, heater A, ceramic annulus;
The upper end center sections of described metal-coating divides the hole having and adapt with mozzle external diameter, and in order to install mozzle, the lower end of metal-coating is uncovered, makes mozzle concentric with metal-coating during installation;
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 on the corresponding position, edge near internal diameter;
There is the gap of 10mm ~ 100mm between mozzle and metal-coating, in gap, heater A is installed;
Described ceramic annulus and mozzle uniform internal diameter, the external diameter of ceramic annulus is less than metal-coating bottom internal diameter, and there is a boss at the edge in the inner footpath of ceramic annulus, and this boss structure matches with the recessed portion of mozzle bottom;
Pottery annulus is installed to the bottom of mozzle and is embedded in metal-coating, and the boss of ceramic annulus is embedded on the recessed portion of mozzle bottom, and ceramic annulus adopts with metal-coating and is threaded, and after installing, ensures on ceramic annulus and has boss one
Another side corresponding to face will protrude from the lower surface of metal-coating;
The inner surface spraying of pottery annulus upper and metal, alloy molten solution or metal oxide are difficult to the material adhered to;
It is characterized in that described atomizer also comprises a packing ring, described packing ring is placed in the lower edge of mozzle upper end and metal-coating upper end being provided with in the groove of corresponding recessed portion on the position that the edge of internal diameter is corresponding, concordant with the bottom of the bottom with metal-coating that ensure mozzle;
Described nozzle is provided with two air inlet pipe and two escape pipes;
Two escape pipes of described nozzle adopt Laval structure, and the angle between the axis of the escape pipe of two Laval structures is between 20 ° ~ 75 °;
Peripheral 10mm ~ 100mm place of the escape pipe of each Laval structure arranges gap, in gap, heater B is all installed, the end in the gap of the escape pipe of each Laval structure adopts metallic packing ring seal with screwed joint, and the end at the gas outlet place of the escape pipe of each Laval structure is connected with metal ring;
Escape pipe is installed in described metal ring inside, and its internal diameter has the same laval structure of escape pipe, and the outer radius of metal ring adopts with the end of escape pipe and is threaded;
Described heater A and heater B is equipped with external power interface and is connected with external power supply; Described external power supply is 220V or 380V power supply.
2. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 1, it is characterized in that described scalable plastic tube A is tightly connected with the upper surface of the nozzle being incubated crucible and atomizer respectively, atomisation tower is connected by scalable plastic tube B with outside the gas outlet of the lower surface nozzle of nozzle, scalable plastic tube A bottom is provided with vacuum pump interface near the position of nozzle, for external vavuum pump, the drain hole valve that atomisation tower bottom is provided with and mist
Change tower valve, two and half foretell round metal cylindrical barrel is placed in inside and outside two metallic channels on nozzle lower surface and atomisation tower respectively, forms the totally-enclosed system architecture be made up of insulation crucible, scalable plastic tube A, nozzle, scalable plastic tube B, atomisation tower, atomisation tower valve and the vavuum pump that is connected with scalable plastic tube A;
Inner at scalable plastic tube A, the one end of the insulation crucible be connected with scalable plastic tube A is connected by pipeline and is incubated crucible valve;
Insulation crucible valve is that the metal-coating upper limb of pipeline and the atomizer of loudspeaker flat mouth is close to by bolt and is connected again through one end, and they are all placed in the inside of scalability plastic tube A;
Be provided with at scalable plastic tube A getting thing mouth A near mozzle place, the scalable plastic tube B between spray tower and nozzle lower surface is being provided with near the position of the ceramic annulus of atomizer, metal ring and metallic packing ring and gets thing mouth B;
On described scalable plastic tube A get on thing mouth A and scalable plastic tube B to get thing mouth B structure identical, be respectively equipped with two layers of vacuum valve, i.e. internal layer vacuum valve and outer vacuum valve, outer vacuum valve adopts the external multiple-pass joint of vacuum rubber pipe, and the vavuum pump that external multiple-pass joint is connected near the position of nozzle with above-mentioned scalable plastic tube A bottom is again connected;
In addition, the upper limb place that thing mouth A both sides correspond to bolt and metal-coating of getting on scalable plastic tube A is respectively provided with pair of glove; Correspond on the position of metallic packing ring in the thing mouth B both sides of getting of scalable plastic tube B, be respectively provided with pair of glove, each gloves adopt adhesive to be connected with scalable plastic tube A and scalable plastic tube B respectively.
3. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances and block as claimed in claim 2, is characterized in that the metal-coating of described atomizer is provided with metallic reflective coating or spraying one deck white reflective coating and is formed reflecting layer near the surface of heater A.
4. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 3, is characterized in that the metal-coating of described atomizer is tin oxide near the coating that the white reflective coating of the surface spraying of heater is used.
5. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 4, is characterized in that described scalable plastic tube A and scalable plastic tube B is inner coated glass fibre, middle employing stainless steel elastic helix steel wire reinforcement, the outside scalable exotic material being Polypropylence Sheet and being formed.
6. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 5, is characterized in that described scalable plastic tube A and scalable plastic tube B is high-temperature nylon extension flexible ventilation ducting.
7. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 6, is characterized in that described vavuum pump is mechanical pump, diffusion pump or molecular pump.
8. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 7, is characterized in that described mozzle is aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics.
9. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 8, is characterized in that described metal-coating, metal ring and metallic packing ring are carbon steel or stainless steel.
10. a kind of totally-enclosed gas atomization pulverization device solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 9, is characterized in that described round metal cylindrical barrel is stainless steel.
11. a kind of totally-enclosed gas atomization pulverization devices solving nozzle and the blocking of mozzle high-melting-point substances as claimed in claim 10, is characterized in that described packing ring adopts plastics or metal washer.
12. a kind of totally-enclosed gas atomization pulverization devices solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 11, is characterized in that described heater A and heater B is electric furnace heating wire or silicon carbon rod.
13. a kind of totally-enclosed gas atomization pulverization devices solving nozzle and mozzle high-melting-point substances obstruction as claimed in claim 12, is characterized in that described ceramic annulus selects aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics.
14. utilize and a kind ofly solve totally-enclosed gas atomization pulverization device that nozzle and mozzle high-melting-point substances block and carry out method prepared by metal and alloy powder as claimed in claim 13.
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|---|---|---|---|
| CN201210049050.XA CN102554246B (en) | 2012-02-29 | 2012-02-29 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
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| CN201210049050.XA CN102554246B (en) | 2012-02-29 | 2012-02-29 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI633955B (en) * | 2016-03-08 | 2018-09-01 | 東芝機械股份有限公司 | Soup tube, soup tube assembly and non-ferrous metal casting system for non-ferrous metal alloy melting soup |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107899868A (en) * | 2017-12-10 | 2018-04-13 | 柳州市菱丰科技有限公司 | A kind of nozzle for preventing kiss-coating |
| CN109249032B (en) * | 2018-11-23 | 2022-01-21 | 上海电气集团股份有限公司 | Atomized powder-making catheter |
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| DE10044364C1 (en) * | 2000-09-08 | 2002-01-17 | Ald Vacuum Techn Ag | Molten metal atomizer for powder metallurgy, surrounds crucibles by insulation and external induction coil, and includes hot channel for atomization air |
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| CN201744413U (en) * | 2010-07-06 | 2011-02-16 | 河南省远洋铝业有限公司 | Anti-blocking atomizer nozzle for preparing superfine powder metal |
| CN202498212U (en) * | 2012-02-29 | 2012-10-24 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10044364C1 (en) * | 2000-09-08 | 2002-01-17 | Ald Vacuum Techn Ag | Molten metal atomizer for powder metallurgy, surrounds crucibles by insulation and external induction coil, and includes hot channel for atomization air |
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| CN202498212U (en) * | 2012-02-29 | 2012-10-24 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
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| TWI633955B (en) * | 2016-03-08 | 2018-09-01 | 東芝機械股份有限公司 | Soup tube, soup tube assembly and non-ferrous metal casting system for non-ferrous metal alloy melting soup |
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