CN209288280U - A kind of plasma powder by atomization equipment suitable for refractory metal - Google Patents

Abstract

A kind of plasma powder by atomization equipment suitable for refractory metal, including feed device, vertical working chamber, spray chamber, powder collection device, pumped vacuum systems and cooling gas feeder；The feed end of diversion pipe is connected to the drainage hole of melting furnace bottom, and discharge end is located in spray chamber and converges right above area in the plasma that plasmatorch component ejects, and diversion pipe is externally provided with heating and heat-insulating device；The stopper rod for blocking drainage hole and the lifting drive for driving stopper rod to go up and down are additionally provided in vertical melting cylinder.The plasma powder by atomization device structure suitable for refractory metal is simple, to molten metal heating and thermal insulation refractory metal powder by atomization, and milling efficiency is high；Drop after the atomization of cooling component equity ion is efficiently cooled down, and the homogeneity and stability of metal atomization powder are improved, and is conducive to the miniaturization of metal atomization powder and nanometer grade powder is made, high-speed turbine separator is high to the metal powder separative efficiency of subparticle.

Description

A kind of plasma powder by atomization equipment suitable for refractory metal

Technical field

The utility model relates to a kind of power metallurgy equipments, more particularly, to a kind of plasma suitable for refractory metal Powder by atomization equipment.

Background technique

The increasing material manufacturings method such as " 3D printing " in recent years is paid close attention to by people, it is not necessarily to through forging, turnning and milling plane mill etc. Process can directly produce metal product, greatly reduce energy consumption, save material.And one method of metal injection moulding power, choosing Selecting property laser melting method and selective laser sintering method belong to increasing material manufacturing, and it is small to be suitable for complex-shaped powder metallurgy The production of part.These methods have a higher requirement to the pattern of metal powder, size distribution, oxygen content etc., and aerosolization The metal powder of method production can satisfy these requirements.Due to the specific reaction condition of gas-atomized powder, therefore, it is used for pyrosol The equipment for changing powder processed has particular/special requirement to its structure and material.

Mainly there is cold wall crucible for smelting aerosolization using the production method of aerosolization preparation 3D printing metal powder at this stage (VIGA), the technologies such as electrode induction melting aerosolization (EIGA) and plasma aerosolization (PA).Its plasma aerosolization (PA) raw material of technology powder be metal wire rod, it is more demanding to the shape and size of raw material, the species number of powder processed also by Larger limitation, while corresponding fuel pulverizing plant is also required to particularly customized for powder type processed, and cost is caused further to increase, it is difficult To meet the needs of the large-scale continuous production in market.

A kind of induction heating and radio frequency plasma combined atomizing pulverized coal preparation system, including height are disclosed in 108031855 A of CN Frequency induction heating apparatus, radio frequency induction plasma apparatus, vacuum evacuation device, atomization collection device, separation dust-extraction unit and silk material Conveying device.But the pulverized coal preparation system is using induction heating as heat source, however it remains the deficiencies of the degree of superheat, cause obtained by powder Fine powder recovery rate is relatively low；And powder raw material processed is silk material, it is difficult to realize large-scale continuous production.

CN206632370U discloses a kind of tower metal atomization plasma generator, including diversion pipe, diversion pipe Component, at least 3 groups of plasmatorch components and plasma mounting base；The diversion pipe is mounted on plasma peace by water conservancy diversion tube assembly It fills on seat, carries out plasma atomization for smelting furnace molten metal melting to be delivered to the focal area plasma Ji Hui.But it should Melt in the water conservancy diversion tube assembly of tower metal atomization plasma generator temperature during dirty can gradually decline, The mobility for influencing melt, causes melt conveying speed relatively low or even blocks water conservancy diversion because molten metal condenses in water conservancy diversion tube wall Pipe, and then reduce metal atomization milling efficiency.

Utility model content

Technical problem to be solved by the utility model is: it is simple to overcome the deficiencies of the prior art and provide a kind of structure, production At low cost, easy to installation and maintenance, powder by atomization is high-efficient and is suitable for the plasma powder by atomization equipment of refractory metal, this Outside, the plasma powder by atomization equipment be furthermore achieved can continuous charging, it is convenient for disassembly and assembly that plasma is atomized cooling device, cooling It is functional, and powder classification separative efficiency is high, low energy consumption.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of plasma powder by atomization equipment suitable for refractory metal, including feed device, vertical working chamber, atomization Room, powder collection device, pumped vacuum systems and cooling gas feeder, the feed device are connect with vertical working chamber, and The raw metals such as wire or metal block are continuously introduced into melting in the smelting furnace of vertical working chamber；Including feed device, vertical Working chamber, spray chamber, powder collection device, pumped vacuum systems and cooling gas feeder, the feed device are melted with vertical Refine room connection；The vertical working chamber includes vertical melting cylinder, smelting furnace and diversion pipe, and the vertical melting cylinder is mounted on Above spray chamber, the smelting furnace is fixedly mounted in melting vertical cylinder；The powder collection device is connect with spray chamber；Institute Pumped vacuum systems is stated to be connected to feed device, working chamber and spray chamber respectively；The cooling gas feeder and spray chamber connect It is logical, to spray chamber spray cooling gas；The feed end of the diversion pipe is connected to the drainage hole of melting furnace bottom, discharge end position Converge right above area in spray chamber and in the plasma that plasmatorch component ejects, the plasmatorch component by it is equal from Sub- mounting base is mounted at the top of spray chamber, and molten metal is delivered to spray chamber by diversion pipe by the vertical indoor smelting furnace of melting It is interior；The diversion pipe is externally provided with heating and heat-insulating device；The stopper rod for blocking drainage hole is additionally provided in the vertical melting cylinder And the lifting drive for driving the stopper rod lifting.

In a certain example embodiment, one end of the stopper rod is connect by connecting rod with lifting drive, the other end For the free end that can be placed in smelting furnace drainage hole；The stopper rod passes through the effect oscilaltion of lifting drive, makes to fill in The free end of bar is placed in drainage hole or leaves drainage hole, so make the molten metal in smelting furnace melted in smelting furnace or It is atomization that spray chamber is flowed into through diversion pipe.

In a certain example embodiment, the heating and heat-insulating device include the heating device that is successively set on outside diversion pipe and Outer heat insulation layer.

Further, the heating device is adding thermal resistance part or high frequency induction heater.Adding thermal resistance part is carbon-point, nickel One of stick, Si-Mo rod or Elema.It is preferred that adding thermal resistance part is Wolfram rhenium heat electric couple, heating temperature is high, and heating speed is fast, Be conducive to improve temperature rise effect and reduce the heating-up time, advantageous heat insulation effect.

Further, inner thermal insulating layer is equipped between the heating device and major flow duct, main holding diversion pipe inner melt Temperature improves the mobility of melt, improves production efficiency.

Further, graphite cannula is equipped between the major flow duct and inner thermal insulating layer, the temperature of melt is relatively high, graphite Set plays the role of fixed major flow duct, while preventing the guarantor of the refractory metal melt damage inner thermal insulating layer of preparation nano material Adiabator further increases heat insulation effect.

Further, the major flow duct lower end and teach flow tube at the top of junction be equipped with gasket, reinforce major flow duct with The air-tightness between flow tube is taught, safety guarantee is improved.

In a certain example embodiment, the diversion pipe includes major flow duct and protected fluid casing, the major flow duct It is mounted on by diversion pipe mounting assembly in the plasma mounting base of atomization cylinder, one end and fluid close to plasma mounting base Protection sleeve pipe connection；Major flow duct peripheral hardware heating and heat-insulating device；Protected fluid casing is embedded in plasma mounting base.

In a certain example embodiment, the feed device includes caching bucket, star-shaped discharge valve, sealed valve body and blanking Pipe；Caching bucket top is equipped with the cover board of movable opening and closing, and bottom is connect with star-shaped discharge valve, and the star-shaped discharge valve is logical It crosses sealed valve body to be connected to feeder pipe, the blanking pipe end is located above the intracorporal smelting furnace of melting cylinder；Positioned at sealed valve body The star-shaped discharge valve side wall of top is equipped with the bonding in vacuum pipeline being connected to pumped vacuum systems.

Further, the sealed valve body is globe valve, butterfly valve or gate valve.

Further, the bonding in vacuum pipeline is equipped with control valve.

Further, the caching bucket passes through tie down screw and cover board detachable connection.

Further, the caching bucket is connected to feeding mechanism, it is preferable that the feeding mechanism is metal wire feeder.

In a certain example embodiment, the spray chamber includes being atomized cylinder, plasmatorch component and cooling component, described Plasmatorch component includes at least two plasmatorch, plasmatorch circumferentially formula be uniformly mounted at the top of atomization cylinder it is equal from In sub- mounting base, the plasma ejected converges at the center of major flow duct lower end；The cooling component include be located at etc. Multiple rows of spraying device on atomization cylinder lateral wall below ion torch component, quantity >=2 of every row's spraying device, adjacent two rows Spraying device is staggered in the vertical direction of atomization cylinder lateral wall.It is preferred that the spraying device in cooling component is in the horizontal plane Projection be staggered and circumferentially formula is uniformly distributed (point centered on being atomized the central axis of cylinder and the intersection point of horizontal plane).

Further, the spraying device includes fixed ring, connecting rod, nozzle and spray boom, and the spray boom is connect with connecting rod, One end of the spray boom is embedded in fixed ring, and nozzle is embedded in the other end.

Further, fixed ring includes inner ring and outer rings, and the outer ring is removably fixed in inner ring, and inner ring is fixed on atomization On cylinder lateral wall, inner ring and outer rings are equipped with the mounting hole being fixedly connected for the two.

Further, be equipped with copper backing between the outer ring and inner ring, copper backing be not easy to by extremely cold or high temperature melt or Person damages, and is more conducive to fixing seal spraying device, and extend the service life of spraying device.

Further, the inner ring extends to form sleeve far from one end of outer ring, and the end of the sleeve is equipped with through-hole, spray boom The one end being embedded in outer ring is equipped with internal screw thread, and cross section is stepped, and the other end is set in the sleeve of inner ring, and holds Portion is embedded with nozzle；Spray boom, which is detachably arranged, disassembles and maintains spraying device convenient for the later period.

Further, nozzle and spray boom are detachably arranged or are integrally formed, and the one end of the nozzle far from spray boom is in V-shape, V Area when setting convenient for nozzle atomization effect and increasing sprinkling of font, while reducing because after cutting off the water and spraying coolant liquid, spray chamber Interior metal powder results in blockage to nozzle, and the setting of V-shape nozzle deposits the powder around nozzle and because of the effect of weight The phenomenon that falling down, avoiding atomizing cup in-vivo metal powder plug nozzle.

Further, nozzle is detachably set in through-hole to the direction extension far from spray boom, the epitaxial part of nozzle, nozzle End is lower than the position 1-3mm of through-hole, can avoid occurring its surface because nozzle exposes outside sleeve and gathering moisture and congeal into ice Or powder leads to the phenomenon that spray nozzle clogging, it is ensured that nozzle works normally.

Further, described connecting rod one end is equipped with external screw thread, connect with the internal screw thread of spray boom, the other end and cooling gas Feeder connection.

Further, insulating layer is equipped between the spray boom and sleeve, it is preferable that insulating layer uses polyurethane foam material, keeps away Exempt from because moisture is gathered in sleeve periphery and congeals into ice make spray boom icing effect spraying device work normally the phenomenon that.

In a certain example embodiment, the powder collection device includes at least one set of turbine separation assembly, the turbine Separation assembly includes separable cartridge, revolving speed >=20000r/min turbo separator, aggregate tank；The separable cartridge side wall is equipped with The discharge gate of tangentially connected feed pipe, the feed pipe and spray chamber or the gas vent in previous stage turbine separation assembly connect It is logical；The turbo separator is mounted on the top of separable cartridge；The sidewall upper of the turbo separator is equipped with gas vent, described Gas vent is connected to the feed pipe of separable cartridge in blower unit or rear stage turbine separator；The aggregate tank is mounted on point From below cylinder.

Further, the quantity of the turbine separation assembly is 2 ~ 4 groups, the separable cartridge of first turbine separation assembly and atomization The discharge gate of room is connected to, the feed pipe connection of the separable cartridge of the gas vent and rear stage of the separable cartridge of previous stage, final stage whirlpool The gas vent for taking turns the separable cartridge of separation assembly is connect with blower unit；Turbo separator in rear stage turbine separation assembly The revolving speed of turbo separator in rotating ratio previous stage turbine separation assembly is high.

Further, curved baffle is equipped at the top of the discharge end of the feed pipe.

Further, the lower edge of the turbo separator is lower than the bottom of feed pipe.

Further, the separable cartridge includes upper cylindrical tube and lower cone, the upper cylindrical tube and lower cone By flanged joint, the mounting plate for fixed turbine separator is equipped at the top of the upper cylindrical tube；The lower cone is logical It crosses reducing connecting tube to be connected to aggregate tank, the reducing connecting tube is equipped with pneumatic operated valve, the reducing connecting tube and lower cone It is an integral molding structure.

Further, the reducing connecting tube flare.

A kind of working principle of plasma powder by atomization equipment suitable for refractory metal of the utility model and user Method is:

When needing to launch material in the smelting furnace of melting cylinder, sealed valve body is first closed, tie down screw is then unscrewed, Cover board on caching bucket is opened, by metal material needed for feeding mechanism or artificial addition, then by tightening locking screw Bar is closed and locking caching bucket, then opens the control valve in connecting pipe, and starting pumped vacuum systems vacuumizes caching bucket, makes to delay Deposit that bucket is identical with the pressure in smelting furnace or caching bucket in pressure slightly larger than the pressure in smelting furnace；It is then shut off connecting pipe On control valve, then open sealed valve body, be then turned on star-shaped discharge valve, make caching struggle against in material fallen to through feeder pipe it is molten In furnace.Material successively closes star-shaped discharge valve and sealed valve body after having conveyed, and when needing feeding again, repeating aforesaid operations is It can.Aforesaid operations it is possible to prevente effectively from material fall while be opened and closed sealed valve body, be easy to appear residue in sealed valve body The phenomenon that expecting and reducing vacuum melting production efficiency, and then realize the purpose that continuous charging vacuum melting efficiently produces.

The metal material of different shapes such as filiform, bulk is sent into vertical working chamber through feed device is fused into molten metal Afterwards, starting lifting drive rotates forward, and lifting drive successively drives connecting rod, stopper rod up to move, and then makes stopper rod from molten It is proposed in the drainage hole of furnace, the molten metal in smelting furnace flows into spray chamber through diversion pipe, the heating and thermal insulation outside diversion pipe Device in diversion pipe molten metal carry out heating and thermal insulation, make molten metal smoothly flow down and enter spray chamber in, wait from The plasma high speed impact aerosol dispersion of sub- torch body injection is at ultra-fine liquid, and drop is in atomizing cup body since gravity is to mist Change cylinder body bottom movement, the cooling gas progress heat exchange ejected with the cooling component being located on atomization cylinder lateral wall is cooling to coagulate Gu at nanoscale or micron-sized superfines particle, superfines quilt under the action of the blower unit of powder collection device It sucks in separable cartridge, under the action of the high speed rotation of turbo separator generates, weight of the partial size powder bigger than normal at its own It is deposited on separable cartridge bottom under power effect, is then fallen in aggregate tank；And after partial size powder less than normal can enter with air-flow In level-one separable cartridge, since the revolving speed of the turbo separator of rear stage is higher than the revolving speed of the turbo separator of previous stage, Further the powder in air-flow can be separated and collected, after nanoscale powder is separated and collected in air-flow, gas Through blower unit outlet.

After the molten metal in smelting furnace all flows into spray chamber, then lifting drive reversion is controlled, makes stopper rod Drainage hole is moved down and blocked under the action of lifting drive, can carry out the melting of next group metal material, and then realize Serialization metal plasma powder by atomization.

Star-shaped discharge valve, which is realized, stops the material in caching bucket, realizes batch discharge；On star-shaped discharge valve side wall Bonding in vacuum pipeline struggled against by pumped vacuum systems to caching after storing certain material convenient for caching bucket and carry out vacuum pumping, Keep caching bucket same or similar with the intracorporal vacuum condition of melting cylinder；And sealed valve body can will caching bucket and melting cylinder every Absolutely, it is individually vacuumized convenient for caching bucket and melting cylinder, meets the vacuum condition of Metal Melting, improve the effect of metal vacuum melting Rate.

A kind of plasma powder by atomization equipment suitable for refractory metal of the utility model the utility model has the advantages that

The plasma powder by atomization device structure suitable for refractory metal is simple, to refractory metal powder by atomization Molten metal heating and thermal insulation, milling efficiency are high；Drop after the atomization of cooling component equity ion is efficiently cooled down, and gold is improved The homogeneity and stability for belonging to atomized powder are conducive to the miniaturization of metal atomization powder and nanometer grade powder, high-speed turbine point are made It is high from metal powder separative efficiency of the device to subparticle.

Traditional horizontal type smelting furnace is substituted using vertical working chamber, simplifies the structure of working chamber, and oppose by stopper rod The drainage hole of formula working chamber bottom is blocked or is opened, and the indoor tundish of traditional melting is omitted, and does not also need to oppose again Formula smelting furnace rotates or turns over realization batch turning, is quickly shifted from smelting furnace into spray chamber convenient for Metal Melting；

The liquid level difference of molten metal is conducive to flowing down for molten metal in vertical smelting furnace, and water conservancy diversion tube assembly peripheral hardware heats Heat insulation module, the refractory metal melting be conducive in smelting furnace keep high temperature fused state when passing through diversion pipe, avoid leading Molten metal in flow tube causes molten metal to condense or the phenomenon that solidification because diversion pipe internal-external temperature difference is big, meanwhile, high temperature ring Border is conducive to accelerate flow velocity of the molten metal of preparation nano material in diversion pipe, avoids diversion pipe generation blocking or metal molten The phenomenon that liquid extension stays in water conservancy diversion inside pipe wall, and then improve the production efficiency and quality of plasma preparation nano material.And pass through The broken atomization of the metal liquid stream of diversion pipe is easier to, and thus obtains that fine powder recovery rate is higher, and hollow powder is less, spherical preferable gold Belong to powder；And the degree of superheat range meets the degree of superheat requirement that metal liquid continuously flows, and reaches final atomized powder partial size The effect of narrowly distributing and high homogeneity.

Vertical working chamber and diversion pipe with heating and heat-insulating device significantly improve and are higher than 500 DEG C of metal material to fusing point Material or even higher than 1000 DEG C of metal materials or alloy material carry out the processing efficiency of powder by atomization, as aluminium, silver, copper, copper aluminium close The powder by atomization of golden material is processed.

The first insulating layer outside diversion pipe further functions as the effect of insulation, and temperature is lost in reduction diversion pipe, It is substantially reduced influence of the diversion pipe internal-external temperature difference to diversion pipe inner melt temperature stability and mobility.

The vacuum friction feeding mechanism of relatively traditional powder by atomization, the feeder structure is simple, can effectively avoid in object Material is opened and closed sealed valve body while whereabouts, is easy to appear residual material in sealed valve body and reduces showing for vacuum melting production efficiency As, and then realize the purpose of continuous charging vacuum melting production.

The multi-row staggered formula of spraying device in cooling component be arranged in atomization cylinder lateral wall on, can make metal atomization drop with Cooling gas contact is more abundant, and persistently cools down to the molten drop or metal powder of whereabouts, significantly improves to metal The production efficiency of cooling effect and the metal powder atomization of powder.

Spraying device is removably set on atomization cylinder lateral wall, and easy access improves plant maintenance efficiency, and do not influence The normal operation of equipment.

Spraying device is vertical at atomization cylinder lateral wall, is conducive to spraying device sprinkling cooling gas, makes the range of sprinkling Maximum keeps cooling gas and metal powder contact surface more abundant, improves cooling effect.

The gas powder separator such as relatively existing pulse separator, bag filter or cyclone separator, structure are simpler It is single, and revolving speed >=20000r/min high-speed turbine separator is more preferable to the classification separating effect of powder, more can efficiently separate grain The small powder of diameter, especially nano level metal powder separate and collect.

Multiple groups turbine separation assembly may be implemented by adjusting the revolving speed of turbo separator in different turbine separation assemblies Classification separation is carried out to the powder in gas powder fluid, improves the quality stability of metal powder product.

Tangentially connected feed pipe in separable cartridge facilitates access for the intracorporal gas powder fluid of cylinder with separable cartridge side wall It spins downward movement, is conducive to separation of the turbo separator to powder in gas powder fluid, and then improve powder and separate and collect Efficiency, and reduce gas powder fluid to the impact force of separable cartridge itself, extend the service life of equipment.

It is equipped with curved baffle at the top of the discharge end of feed pipe, changes and enters the intracorporal gas powder fluid of cylinder through feed pipe Into the flow direction of separable cartridge, the phenomenon that gas powder fluid is directly entered in turbo separator is effectively prevented, reduces gas powder stream The interference effect that body runs turbo separator, while the sedimentation of metal powder in gas powder fluid is accelerated, improve separation effect Rate.

Detailed description of the invention

Fig. 1-is a kind of overall structure figure of the plasma powder by atomization equipment suitable for refractory metal in embodiment 1；

Fig. 2-is the structural schematic diagram of feed device in Fig. 1；

Fig. 3-is the three-dimensional structure diagram of plasmatorch component, diversion pipe and heating and heat-insulating device in Fig. 1；

Fig. 4-is the Section A-A schematic diagram of Fig. 3；

Fig. 5-is the side view of spraying device in spray chamber in Fig. 1；

Fig. 6-is the section B-B schematic diagram of Fig. 5；

Fig. 7-is the three-dimensional structure diagram of turbine separation assembly in Fig. 1；

Fig. 8-is the top view of turbine separation assembly in Fig. 7；

Fig. 9-is the C-C schematic cross-section of Fig. 8；

Figure 10-is a kind of overall structure of the plasma powder by atomization equipment suitable for refractory metal in embodiment 2 Figure；

Figure 11-is the structural schematic diagram of feed device in Figure 10.

In figure: 1-spray chamber, 101-atomization cylinders, 102-spraying devices, 1021-inner ring, 1022-sleeves, 1023-spray booms, 1024-through-holes, 1025-nozzles, 1026-mounting holes, 1027-outer rings, 1028-insulating layers, 1029-connecting rods, 10210-copper backings, 103-plasmatorch, 104-spray chamber blow valves, the installation of 105-plasmas Seat；

2-diversion pipes, 201-protected fluid casings, 202-major flow ducts, 203-diversion pipe mounting assemblies, 3-is true Empty balance pipe；

4-vertical working chambers, 401-lifting drives, 402-connecting rods, 403-intermediate frequency power supply copper bar interfaces, 404- Stopper rod, 405-vertical melting cylinders, 406-bells, 407-working chamber's relief valves, 408-ventings, 409-tonifying Qi interfaces, 4010-working chamber's pressure-detecting devices, 4011-smelting furnaces, 4012-furnace cover lifting devices；

5-feed devices, 501-feeder pipes, 502-sealed valve bodies, 503-control valves, 504-bonding in vacuum pipelines, 505-star-shaped discharge valves, 506-caching buckets, 507-cover boards, 508-tie down screws, 509-metal wire feeders；

6-pumped vacuum systems, 7-powder collection devices, 701-first turbine separation assemblies, 7011-aggregate tanks, 7012-reducing connecting tubes, 7013-pneumatic operated valves, 7014-lower cones, 7015-upper cylindrical tubes, 7016-feed pipes, 7017-turbo separators, 7018-gas vents, 702-two-stage turbine separation assemblies, 703-three-stage turbine separation assemblies；

8-blower units, 9-heating and heat-insulating devices, 901-heating devices, 902-outer heat insulation layers, 903-graphite cannulas, 904-inner thermal insulating layers.

Specific embodiment

The following is a further explanation of the present invention with reference to the accompanying drawings and embodiments.

Referring to Fig.1: a kind of plasma powder by atomization equipment suitable for refractory metal of the present embodiment, including feeding dress Set 5, vertical working chamber 4, spray chamber 1, powder collection device 7, pumped vacuum systems 6 and cooling gas feeder, the feeding Device 5 is connect with vertical working chamber 4, and the raw metals such as wire or metal block is continuously introduced into the melting of vertical working chamber 4 Melting in furnace 4011；Including feed device 5, vertical working chamber 4, spray chamber 1, powder collection device 7, pumped vacuum systems 6 and cold But gas supply device, the feed device 5 are connect with vertical working chamber 4；The vertical working chamber 4 includes vertical melting cylinder 405, smelting furnace 4011 and diversion pipe 2, the vertical melting cylinder 405 are mounted on 1 top of spray chamber, vertical melting cylinder 405 Vacuum Balance pipe 3 is equipped between spray chamber 1；The top of vertical melting cylinder 405 is equipped with bell 406, the smelting furnace 4011 It is fixedly mounted in melting vertical cylinder；The powder collection device 7 is connect with spray chamber 1；The pumped vacuum systems 6 respectively with Feed device 5, working chamber are connected to spray chamber 1；The cooling gas feeder is connected to spray chamber 1, is sprayed to spray chamber 1 Cooling gas；The feed end of the diversion pipe 2 is connected to the drainage hole of 4011 bottom of smelting furnace, and discharge end is located in spray chamber And converge right above area in the plasma that 103 component of plasmatorch ejects, 103 component of plasmatorch is pacified by plasma Dress seat is mounted on 1 top of spray chamber, and molten metal is delivered to mist by diversion pipe 2 by the smelting furnace 4011 in vertical working chamber 4 Change in room 1；The diversion pipe 2 is externally provided with heating and heat-insulating device 9；It is additionally provided in the vertical melting cylinder 405 for the row of blocking The stopper rod 404 of fluid apertures and lifting drive 401 for driving the stopper rod 404 to go up and down.

The bell 406 of the vertical melting cylinder 405 is equipped with tonifying Qi interface 409, for being filled with into vertical working chamber 4 Nitrogen or other inert gases are realized to the atmosphere protection of Vacuum Melting and pressurization make the molten metal in smelting furnace 4011 Through diversion pipe 2 downstream to spray chamber 1.Venting 408, working chamber's relief valve 407, temperature-measuring port, observation are additionally provided on bell 406 Mouthful, working chamber's pressure-detecting device 4010, vacuum pumping port, the routine of the vacuum melting furnaces 4011 such as intermediate frequency power supply copper bar interface 403 Component, vertical melting cylinder 405 is interior to be equipped with pressure detector and blow valve 104, and one side is equipped with smelting electrode copper bar interface；Furnace The lifting of lid 406 is realized by the furnace cover lifting device 4012 being fixed on furnace body.

One end of the stopper rod 404 is connect by connecting rod 402 with lifting drive 401, and the other end is that can be placed in Free end in 4011 drainage hole of smelting furnace；The stopper rod 404 passes through the effect oscilaltion of lifting drive 401, makes to fill in The free end of bar 404 is placed in drainage hole or leaves drainage hole, and then makes the molten metal in smelting furnace 4011 in smelting furnace Fusing or atomization through the inflow spray chamber 1 of diversion pipe 2 in 4011.

Referring to Fig. 2, the feed device 5 includes caching bucket 506, star-shaped discharge valve 505, sealed valve body 502 and feeder pipe 501；506 top of caching bucket is equipped with the cover board 507 of movable opening and closing, and bottom is connect with star-shaped discharge valve 505, the star Type discharge valve 505 is connected to by sealed valve body 502 with feeder pipe 501, and it is intracorporal molten that 501 end of feeder pipe is located at melting cylinder 4011 top of furnace；505 side wall of star-shaped discharge valve above sealed valve body 502 is equipped with to be connected to pumped vacuum systems 6 Bonding in vacuum pipeline 504.

The sealed valve body 502 is globe valve.As long as being able to satisfy the vacuum requirement of working chamber, the sealed valve body 502 Can choose butterfly valve or gate valve etc., the valve body of sealing may be implemented in other.

The bonding in vacuum pipeline 504 is equipped with control valve 503, convenient for according to the vacuum degree selectivity in feed device 5 Open and close control valve 503, and then convenient for the tune to the vacuum environment in feed device 5 between caching bucket 506 and sealed valve body 502 Section.

Caching bucket 506 by tie down screw 508 and 507 detachable connection of cover board, convenient for opening according to demand or Caching bucket 506 is closed, and guarantees sealing performance in feed device 5.

Star-shaped discharge valve 505, which is realized, stops the material in caching bucket 506, realizes batch discharge；Star-shaped discharge valve Bonding in vacuum pipeline 504 on 505 side walls is cached after the 506 certain material of storage of caching bucket by 6 Duis of pumped vacuum systems Bucket 506 carries out vacuum pumping, keeps caching bucket 506 same or similar with the intracorporal vacuum condition of melting cylinder；And sealed valve body 502 Caching bucket 506 and melting cylinder can be completely cut off, individually be vacuumized convenient for caching bucket 506 and melting cylinder, meet Metal Melting Vacuum condition, improve metal vacuum melting efficiency.

Referring to Fig. 3 and Fig. 4, the heating and heat-insulating device 9 includes 901 He of heating device being successively set on outside diversion pipe 2 Outer heat insulation layer 902.

The heating device 901 is adding thermal resistance part or high frequency induction heater.Adding thermal resistance part is carbon-point, nickel stick, silicon One of molybdenum bar or Elema.It is preferred that adding thermal resistance part is Wolfram rhenium heat electric couple, heating temperature is high, and heating speed is fast, is conducive to It improves temperature rise effect and reduces the heating-up time, advantageous heat insulation effect.

Inner thermal insulating layer 904 is equipped between the heating device 901 and major flow duct 202, it is main to keep 2 inner melt of diversion pipe Temperature, improve the mobility of melt, improve production efficiency.

Graphite cannula 903 is equipped between the major flow duct 202 and inner thermal insulating layer 904, the temperature of melt is relatively high, stone Ink set 903 plays the role of fixed major flow duct 202, while preventing the refractory metal melt damage of preparation nano material is interior from protecting The thermal insulation material of warm layer 904, further increases heat insulation effect.

202 lower end of major flow duct and teach 2 top junction of flow tube be equipped with gasket, reinforce major flow duct 202 with The air-tightness between flow tube 2 is taught, safety guarantee is improved.

The diversion pipe 2 includes major flow duct 202 and protected fluid casing 201, and the major flow duct 202 passes through diversion pipe Mounting assembly 203 is mounted in the plasma mounting base 105 of atomization cylinder 101, one end and stream close to plasma mounting base 105 Body protection sleeve pipe 201 is connected to；202 peripheral hardware heating and heat-insulating device 9 of major flow duct；Protected fluid casing 201 is embedded pacifies in plasma Fill 105 center of seat.

Referring to Figure 1 and Figure 3, the spray chamber 1 includes atomization cylinder 101,103 component of plasmatorch and cooling component, institute Stating 103 component of plasmatorch includes 3 plasmatorch 103, and circumferentially formula is uniformly mounted on atomization cylinder 101 to plasmatorch 103 In the plasma mounting base 105 at top, the plasma ejected converges at the center of 202 lower end of major flow duct；It is described cold But component includes 3 row's spraying devices 102 on atomization 101 side wall of cylinder below 103 component of plasmatorch, and every row is spraying The spraying device 102 of quantity >=2 of device 102, adjacent two rows is staggered in the vertical direction of atomization 101 side wall of cylinder.

According to the requirement of the physicochemical properties such as the partial size of the metal material performance of plasma powder by atomization and atomized powder, etc. The quantity of plasmatorch 103 can also be even more for 4 or 6 in 103 component of ion torch, to reach vertical working chamber 4 dirty molten metals carry out the purpose of high-efficient atomizing；Correspondingly, in the cooling component spraying device 102 number of rows and list The number of the spraying device 102 of row can also be adjusted according to demand, for example, cooling component includes 4 row's spraying devices 102, The quantity of every row's spraying device 102 is 6, and adjacent two rows spraying device 102 interlocks in the vertical direction of atomization 101 side wall of cylinder Arrangement, and the floor projection of the spraying device 102 of 4 rows is staggered, circumferentially formula is uniformly distributed.

Referring to figure 5 and figure 6, the spraying device 102 includes fixed ring, connecting rod 1029, nozzle 1025 and spray boom 1023, The spray boom 1023 is connect with connecting rod 1029, and one end of the spray boom 1023 is embedded in fixed ring, is embedded in the other end There is nozzle 1025.

Fixed ring includes inner ring 1021 and outer ring 1027, and the outer ring 1027 is removably fixed in inner ring 1021, inner ring 1021 are fixed on atomization 101 side wall of cylinder, and inner ring 1021 is equipped with the mounting hole being fixedly connected for the two with outer ring 1027 1026。

Be equipped with copper backing 10210 between the outer ring 1027 and inner ring 1021, copper backing 10210 be not easy to by extremely cold or High temperature melt or breaking-up are more conducive to fixing seal spraying device 102, and extend the service life of spraying device 102.

The inner ring 1021 extends to form sleeve 1022 far from one end of outer ring 1027, and the end of the sleeve 1022 is equipped with Through-hole 1024, spray boom 1023 are embedded at one end in outer ring 1027 equipped with internal screw thread, and cross section is stepped, another end cap It is located in the sleeve 1022 of inner ring 1021, and end is embedded with nozzle 1025；Detachably setting is convenient for the later period to spray to spray boom 1023 Mist device 102 disassembles and maintains.

Nozzle 1025 and spray boom 1023 are detachable setting, and the one end of the nozzle 1025 far from spray boom 1023 is in V-shape, Area when setting convenient for 1025 atomizing effect of nozzle and increasing sprinkling of V-shape, while reducing because after cutting off the water and spraying coolant liquid, mist Change indoor metal powder to result in blockage to nozzle 1025, the setting of V-shape nozzle 1025 keeps the powder around nozzle 1025 heavy Product and because the effect of weight is fallen down, avoid atomization cylinder 101 in metal powder plug nozzle 1025 the phenomenon that.

Nozzle 1025 and spray boom 1023 can also be with integrated formed structures.

Nozzle 1025 is detachably set to through-hole 1024 to the direction extension far from spray boom 1023, the epitaxial part of nozzle 1025 Interior, the end of nozzle 1025 is lower than the position 1-3mm of through-hole 1024, can avoid occurring because nozzle 1025 exposes outside sleeve 1022 Its surface gather moisture and congeal into ice or powder cause nozzle 1025 block the phenomenon that, it is ensured that nozzle 1025 work normally.

Described 1029 one end of connecting rod is equipped with external screw thread, connect with the internal screw thread of spray boom 1023, the other end and cooling air The connection of body feeder.

Insulating layer 1028 is equipped between the spray boom 1023 and sleeve 1022, it is preferable that insulating layer 1028 is sent out using polyurethane Foam material avoids making 1023 icing effect spraying device 102 of spray boom just due to moisture is gathered in 1022 periphery of sleeve and congeals into ice Often the phenomenon that work.

Referring to Fig. 7 ~ 9, the powder collection device 7 includes first turbine separation assembly 701A1 and two-stage turbine separation group Totally 2 groups of turbine separation assemblies, the turbine separation assembly include separable cartridge, revolving speed >=20000r/min turbine to part 702A2 Separator 7017, aggregate tank 7011；The separable cartridge side wall is equipped with tangentially connected feed pipe 7016, the turbo separator 7017 are mounted on the top of separable cartridge；The sidewall upper of the turbo separator 7017 is equipped with gas vent 7018, described to gather materials Tank 7011 is mounted below separable cartridge；The feed pipe 7016 of the separable cartridge of the first turbine separation assembly 701 and atomization The discharge gate of room 1 is connected to, the gas vent 7018 and two-stage turbine separation assembly of the separable cartridge of first turbine separation assembly 701 The feed pipe 7016 of 702 separable cartridge connects, and the gas vent 7018 and air inducing of the separable cartridge of final stage turbine separation assembly fill Set 8(such as negative-pressure air fan) connection.

The quantity of the turbine separation assembly is 2 groups, the revolving speed of the turbo separator 7017 be 50000r/min ~ 80000r/min, and rear stage turbine separation assembly 701(, that is, two-stage turbine separation assembly 702) in turbo separator 7017 Rotating ratio previous stage turbine separation assembly 701(, that is, first turbine separation assembly 701) in turbo separator 7017 revolving speed it is high.

Curved baffle is equipped at the top of the discharge end of the feed pipe 7016.

The lower edge of the turbo separator 7017 is lower than the bottom of feed pipe 7016.

The separable cartridge includes upper cylindrical tube 7015 and lower cone 7014, the upper cylindrical tube 7015 and lower circle Cone 7014 passes through flanged joint, and the installation for fixed turbine separator 7017 is equipped at the top of the upper cylindrical tube 7015 Plate；The lower cone 7014 is connected to by reducing connecting tube 7012 with aggregate tank 7011, is set on the reducing connecting tube 7012 There is pneumatic operated valve 7013, the reducing connecting tube 7012 is an integral molding structure with lower cone 7014.

7012 flare of reducing connecting tube.

Embodiment 2

Compared with Example 1, a kind of plasma powder by atomization equipment suitable for refractory metal of the present embodiment, exists Following difference:

The feed device 5 further includes feeding mechanism, and the caching bucket 506 is connected to feeding mechanism, the feeding mechanism For metal wire feeder 509.

The turbine separation assembly includes first turbine separation assembly 701, two-stage turbine separation assembly 702 and three-stage turbine The totally 3 groups of turbine separation assemblies of separation assembly 703, and the structure of 3 groups of turbine separation assemblies is all the same, specific structure is referring to Fig. 7 ~ 9.

A kind of working principle of plasma powder by atomization equipment suitable for refractory metal of the utility model and user Method is:

When needing to launch material in the smelting furnace 4011 of melting cylinder, sealed valve body 502 is first closed, lock is then unscrewed Tight screw rod 508 opens the cover board 507 on caching bucket 506, by metal material needed for feeding mechanism or artificial addition, so Caching bucket 506 is closed and locked by tightening tie down screw 508 afterwards, then opens the control valve 503 in connecting pipe, starting is taken out very Empty set 6 pairs of cachings bucket 506 of uniting vacuumizes, and keeps caching bucket 506 identical with the pressure in smelting furnace 4011 or pressure that caching struggles against in 506 Power is slightly larger than the pressure in smelting furnace 4011；Then the control valve 503 being then shut off in connecting pipe opens sealed valve body 502, It is then turned on star-shaped discharge valve 505, falls to the material in caching bucket 506 in smelting furnace 4011 through feeder pipe 501.Material conveying Star-shaped discharge valve 505 and sealed valve body 502 are successively closed after complete, when needing feeding again, repeat aforesaid operations.Above-mentioned behaviour Make it is possible to prevente effectively from be opened and closed sealed valve body 502 while material falls, be easy to appear residual material in sealed valve body 502 and The phenomenon that reducing vacuum melting production efficiency, and then realize the purpose that continuous charging vacuum melting efficiently produces.

The metal material of different shapes such as filiform, bulk is sent into vertical working chamber 4 that be fused into metal molten through feed device 5 After liquid, starting lifting drive 401 is rotated forward, and lifting drive 401 successively drives connecting rod 402, stopper rod 404 up to move, And then proposing stopper rod 404 out of, smelting furnace 4011 drainage hole, the molten metal in smelting furnace 4011 flows into mist through diversion pipe 2 Change in room 1, the heating and heat-insulating device 9 outside diversion pipe 2 carries out heating and thermal insulation to the molten metal in diversion pipe 2, makes molten metal It smoothly flows down and enters in spray chamber 1, in the plasma high speed impact aerosol dispersion that 103 body of plasmatorch sprays at ultra-fine liquid Body, drop is mobile to atomization 101 bottom of cylinder due to gravity in atomization cylinder 101, is atomized 101 side wall of cylinder with being located at On the cooling gas that ejects of cooling component carry out heat exchange cooled and solidified into nanoscale or micron-sized superfines particle, Superfines is inhaled into separable cartridge under the action of blower unit 8 of powder collection device 7, in turbo separator 7017 Under the action of high speed rotation generates, partial size powder bigger than normal is deposited on separable cartridge bottom under the gravity of its own, so After fall in aggregate tank 7011；And partial size powder less than normal can enter with air-flow in rear stage separable cartridge, due to rear stage The revolving speed of the revolving speed turbo separator 7017 that is higher than previous stage of turbo separator 7017 therefore can further in air-flow Powder separated and collected, after nanoscale powder is separated and collected in air-flow, gas is through 8 outlet of blower unit.

After the molten metal in smelting furnace 4011 all flows into spray chamber 1, then control lifting drive 401 instead Turn, so that stopper rod 404 is moved down and block drainage hole under the action of lifting drive 401, next group metal material can be carried out Melting, and then realize serialization metal plasma powder by atomization.

Claims (10)

1. a kind of plasma powder by atomization equipment suitable for refractory metal, including feed device, vertical working chamber, plasma Spray chamber, powder collection device, pumped vacuum systems and cooling gas feeder, the feed device and vertical working chamber connect It connects；The vertical working chamber includes vertical melting cylinder, smelting furnace and diversion pipe, and the vertical melting cylinder is mounted on plasma Above spray chamber, the smelting furnace is fixedly mounted in melting vertical cylinder；The powder collection device and plasma spray chamber Connection；The pumped vacuum systems is connected to feed device, working chamber and plasma spray chamber respectively；The cooling gas feed dress It sets and is connected to plasma spray chamber, to plasma spray chamber spray cooling gas；It is characterized in that, the feed end of the diversion pipe It is connected to the drainage hole of melting furnace bottom, discharge end is located in spray chamber and the plasma ejected in plasmatorch component converges It closes right above area, the diversion pipe is externally provided with heating and heat-insulating device；It is additionally provided in the vertical melting cylinder for blocking drain The stopper rod in hole and lifting drive for driving stopper rod lifting.

2. being suitable for the plasma powder by atomization equipment of refractory metal as described in claim 1, which is characterized in that the stopper rod One end connect with lifting drive by connecting rod, the other end is the free end that can be placed in smelting furnace drainage hole；Institute The effect oscilaltion that stopper rod passes through lifting drive is stated, the free end of stopper rod is made to be placed in drainage hole or leave drain Hole, so make the molten metal in smelting furnace melted in smelting furnace or through diversion pipe flow into plasma spray chamber it is atomization.

3. being suitable for the plasma powder by atomization equipment of refractory metal as described in claim 1, which is characterized in that the heating Attemperator includes the heating device being successively set on outside diversion pipe and outer heat insulation layer.

4. being suitable for the plasma powder by atomization equipment of refractory metal as claimed in claim 3, which is characterized in that the water conservancy diversion Pipe includes major flow duct and secondary mozzle, and the major flow duct is mounted on the spray disk branch of atomization cylinder by diversion pipe mounting assembly On frame, one end close to spray disc carrier is connected to secondary mozzle；Major flow duct peripheral hardware heating and heat-insulating device；Secondary mozzle is embedded Disc carrier center is sprayed, junction is equipped with gasket at the top of the major flow duct lower end and guidance flow tube.

5. being suitable for the plasma powder by atomization equipment of refractory metal as claimed in claim 4, which is characterized in that the heating It is equipped with inner thermal insulating layer between device and major flow duct, graphite cannula, the heating are equipped between the major flow duct and inner thermal insulating layer Device is adding thermal resistance part or high frequency induction heater, and the adding thermal resistance part is in carbon-point, nickel stick, Si-Mo rod or Elema It is a kind of.

6. being suitable for the plasma powder by atomization equipment of refractory metal as described in any one of claim 1 ~ 5, which is characterized in that The feed device includes caching bucket, star-shaped discharge valve, sealed valve body and feeder pipe；Caching bucket top is equipped with movable open The cover board closed, bottom are connect with star-shaped discharge valve, and the star-shaped discharge valve is connected to by sealed valve body with feeder pipe, under described Expects pipe end is located above the intracorporal smelting furnace of melting cylinder；Star-shaped discharge valve side wall above sealed valve body is equipped with and pumping The bonding in vacuum pipeline of vacuum system connection；The sealed valve body is globe valve, butterfly valve or gate valve；The vacuum connection tube Road is equipped with control valve；The caching bucket passes through tie down screw and cover board detachable connection.

7. being suitable for the plasma powder by atomization equipment of refractory metal as described in any one of claim 1 ~ 5, which is characterized in that The plasma spray chamber includes atomization cylinder, plasmatorch component and cooling component, and the plasmatorch component includes at least 2 A plasmatorch, circumferentially formula is uniformly mounted on the spray disc carrier at the top of atomization cylinder plasmatorch, eject it is equal from Son converges at the center of major flow duct lower end；The cooling component includes the atomizing cup side below plasmatorch component Multiple rows of spraying device on wall, quantity >=2 of every row's spraying device, the spraying device of adjacent two rows is in the perpendicular of atomization cylinder lateral wall Histogram is to being staggered.

8. being suitable for the plasma powder by atomization equipment of refractory metal as claimed in claim 7, which is characterized in that described spraying Device includes fixed ring, connecting rod, nozzle and spray boom, and the spray boom is connect with connecting rod, and the fixed ring includes inner ring and outer Ring, the outer ring are removably fixed in inner ring, and inner ring is fixed on atomization cylinder lateral wall, and inner ring and outer rings, which are equipped with, is used for two The mounting hole that person is fixedly connected；Copper backing is equipped between the outer ring and inner ring, the inner ring extends shape far from one end of outer ring At sleeve, the end of the sleeve is equipped with through-hole；The spray boom is embedded at one end in outer ring equipped with internal screw thread, and cross section is in Ladder-like, the other end is set in the sleeve of inner ring, and end is embedded with nozzle；The one end of the nozzle far from spray boom is in V Font, for nozzle to the direction extension far from spray boom, the end of nozzle is lower than the position 1-3mm of through-hole；Described connecting rod one end is set There is external screw thread, is connect with the internal screw thread of spray boom, the other end is connect with cooling gas feeder；Between the spray boom and sleeve Equipped with insulating layer.

9. being suitable for the plasma powder by atomization equipment of refractory metal as described in any one of claim 1 ~ 5, which is characterized in that The powder collection device includes at least one set of turbine separation assembly, the turbine separation assembly include separable cartridge, revolving speed >= Turbo separator, the aggregate tank of 20000r/min；The separable cartridge side wall is equipped with tangentially connected feed pipe, the feed pipe It is connected to the gas vent in the discharge gate of spray chamber or previous stage turbine separation assembly；The turbo separator is mounted on cylinder The top of body；The sidewall upper of the turbo separator is equipped with gas vent, the gas vent and blower unit or rear stage turbine The feed pipe connection of separable cartridge in separator；The aggregate tank is mounted below separable cartridge.

10. being suitable for the plasma powder by atomization equipment of refractory metal as claimed in claim 9, which is characterized in that the whirlpool The quantity for taking turns separation assembly is 2 ~ 4 groups, and the separable cartridge of first turbine separation assembly is connected to the discharge gate of spray chamber, previous stage Separable cartridge gas vent and rear stage separable cartridge feed pipe connect, the separable cartridge of final stage turbine separation assembly Gas vent is connect with blower unit；The rotating ratio previous stage turbine separation group of turbo separator in rear stage turbine separation assembly The revolving speed of turbo separator in part is high；Curved baffle is equipped at the top of the discharge end of the feed pipe；The turbo separator Lower edge is lower than the bottom of feed pipe.