CN206894987U - A kind of more negative electrode laminar flow plasma powder spheroidization devices - Google Patents
A kind of more negative electrode laminar flow plasma powder spheroidization devices Download PDFInfo
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- CN206894987U CN206894987U CN201720714519.5U CN201720714519U CN206894987U CN 206894987 U CN206894987 U CN 206894987U CN 201720714519 U CN201720714519 U CN 201720714519U CN 206894987 U CN206894987 U CN 206894987U
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Abstract
The utility model provides a kind of more negative electrode laminar flow plasma powder spheroidization devices, and the device is made up of anode part, dynode part, cathode portion, powder feeding part and its annex；Described anode part is made up of anode casing, anode, holddown plate etc., and each several part is connected by bolt presses；Described dynode part is made up of arc ring, dead ring, dynode, dynode inner sleeve, dynode overcoat etc., is compressed jointly with anode part by cathode portion；Described cathode portion is made up of cathode shell, cathode sheath, negative electrode, negative electrode dead ring, negative electrode hold-down ring, and each several part is sequentially connected, and negative electrode hold-down ring is contacted with cathode sheath and is connected with cathode shell；Described powder feeding part is made up of powder feeding pipe and powder-feeding nozzle, and is connected successively.The utility model carries out nodularization to powder using excellent specific properties such as Laminar Plasma Jet controllability is good, heat enthalpy value is high, jet length length, and the powder after processing has the advantages that Oxygen potential is high, uniformity is good.
Description
Technical field
The utility model discloses a kind of more negative electrode laminar flow plasma powder spheroidization devices, belong to hot plasma
Device field.
Background technology
In recent years, the spheric granules of thermal spraying and increasing material manufacturing to the refractory metal powder such as spheroidizing of powder, especially tungsten, titanium
（Sphericity>98%th, it is few without hollow powder, satellite powder, bonded powder etc.）, particle diameter distribution it is narrow（d50≤45μm）, low oxygen content（<
100ppm）, high apparent density, the fundamental characteristics such as low impurity content propose higher and higher requirement.Traditional spheroidizing of powder dress
Put, such as turbulent plasma spheroidizing of powder device, laser powder spheroidization device, electrical arc powder spheroidization device, or because of its use
It is with high costs, or be difficult to handle the originals such as high-melting-point powder because its spheroidizing of powder rate and uniformity are poor, or because its temperature limits
Cause, it is increasingly difficult to meet its requirement to globular metallic powder.
In patent Muehlberger Erich, Meuhlberger Stephan E, Sickinger Albert, et al.
Modular segmented cathode plasma generator:In US5298835A [P] .1994-03-29. descriptions,
Muehlberger Erich et al. propose a kind of multi-electrode plasma system, in the case where negative electrode number is constant, pass through
Increase electric current to obtain relatively high power.But the life-span of electrode declines, it is difficult to long-time steady operation.The present apparatus can pass through tune
The number of section dynode reaches the requirement of power, i.e., is realized with the mode of big voltage, low current high-power, is burnt so as to reduce electrode
Lose speed and the pollution to processed material.
Patent Drouet Michel.Methods and apparatuses for preparing spheroidal
powders：It can be seen that in WO2011054113A1 [P] .2011-05-12. descriptions, gas ions atomization method uses three independences
Turbulence type direct-current plasma generator, heated, melted and be atomized system to the silk material of feeding with certain angle convergence
Standby spherical powder.Because plasma generator own vol limits, convergent point is away from plasma generator outlet, therefore
The high-temperature region of plasma generator can not be made full use of to carry out powder fusing, it is necessary to which additional additional power supply is carried out in advance to silk material
Heat, constrain the ability of its powder-processed.Jet heat enthalpy value caused by the present apparatus is high, length is long, the volume suction to air is small, axially
Thermograde is small, controllability is good, long lifespan, can the excellent specific property such as center powder feeding.Based on these above-mentioned excellent specific properties, more cathode layers
Stream plasma powder spheroidization device has wider above-mentioned spheroidizing of powder device is compensate in terms of spheroidizing of powder the defects of
Application prospect.
The content of the invention
In order to solve the problems, such as that current spheroidizing of powder device is present, the utility model discloses a kind of more negative electrode laminar flows etc. from
Daughter spheroidizing of powder device, stable Laminar Plasma Jet can be produced, all kinds of powder are carried out with spheroidising, and powder ball
Rate is high, uniformity is good.
The technical solution adopted in the utility model is as described below.
A kind of more negative electrode laminar flow plasma powder spheroidization devices, mainly by anode part, dynode part, negative pole part
Divide, powder feeding part composition：
Described anode part is made up of anode casing, anode, holddown plate etc., and anode casing, anode, holddown plate lead to
Cross bolt presses connection；
Described dynode part is made up of arc ring, dead ring, dynode, dynode inner sleeve, dynode overcoat etc.；Draw
Arc ring, dead ring, dynode, dynode inner sleeve, dynode overcoat are connected successively；Dynode part and cathode portion pass through centre
Pole overcoat is connected；Dynode part is connected with anode by dead ring；Cathode portion, dynode part and anode casing are solid successively
Even；
Described cathode portion is made up of cathode shell, cathode sheath, negative electrode, negative electrode dead ring, negative electrode hold-down ring etc.；Negative electrode
Shell, cathode sheath, negative electrode, negative electrode dead ring are sequentially connected；Negative electrode hold-down ring contacts with cathode sheath, and is connected with cathode shell；
Wherein, described negative electrode is made up of central water-cooling pipe, cathode block, cathode taps, compressing member, central water-cooling pipe, cathode block, negative electrode
Head, compressing member are connected successively；
Described powder feeding part is made up of powder feeding pipe and powder-feeding nozzle；Powder feeding pipe and powder-feeding nozzle are connected successively；Powder feeding portion
Divide and be connected by powder feeding pipe and anode casing.
In said apparatus, described anode side end face it is uniform aperture identical arc channel and converge at one, and from
Processing is in horn-like nozzle arrangements at convergence, is provided with the circular hole coordinated with powder feeding portion gap at center, side is spiral
Bosh.
In said apparatus, the uniform big hole in described anode casing side end face communicates with center hole；Staggered sideways are equal
Cloth intake tunnel and backwater channel, reduces another the problem of connecing waterway pipe.
In said apparatus, described cathode block one end is machined with water-cooled electric cable joint, is connected with plasma electrical source negative pole；
Described cathode taps are inlayed to be connected by tungsten electrode head with tungsten electrode seat to be formed, and the nearly anode one end of tungsten electrode head rest is that semicircle is spherical；It is described
Cathode shell side be provided with air inlet pipe, be welded to each other and be integrated.
The utility model has the advantages that：
1）Logical excessive voltage, the mode of low current realize it is high-power, so as to reduce electrode erosion and to processed material
Pollution.2）Multiple one anode of negative electrode and dynode partial common, finally produce a branch of Laminar Plasma Jet, avoid more
Interfered caused by the convergence of beam Laminar Plasma Jet, and then produce jet fluctuation.3）Under the conditions of rated power, adopt
With more negative electrodes and more dynode part-structures, the operating current of single cathode portion is effectively reduced, so as to reduce Cathode arc root
The thermic load that the current density and target at place are subject to, extend electrode life.4）Using intermediate electrode structure, not only keep away
Exempt from the generation of large scale distributary phenomenon, improve the stability of plasma jet, and extend arc length, improve electric arc
Arc voltage, so as to reduce electric arc arc root current density under equal-wattage, extend the service life of electrode.5）Center powder feeding spray
The powder that mouth sprays is directly entered among jet, small to the fluctuation of jet, and so as to which Oxygen potential is high, uniformity is good.6）It is caused
Jet characteristics are stable, excellent performance.Jet length caused by the present apparatus is long, axial-temperature gradient is small, controllability is preferable, heat enthalpy value
Height, more suitable for carrying out spheroidizing of powder processing to refractory material.7）Anode convenient disassembly, service life length.Changing anode only needs
Twist off and compress end cap taking-up；In view of the cooling of anode, side uses sped structure.
Brief description of the drawings
Fig. 1 is three negative electrode laminar flow plasma powder spheroidization device overall structure figures.
Fig. 2 is three negative electrode laminar flow plasma powder spheroidization device revolved sectional views.
Fig. 3 is cathode portion and dynode phantom.
Fig. 4 is anode construction figure.
Wherein:1 anode part, 1-1 anode casings, 1-2 anodes, 1-3 holddown plates, 2 dynode parts, 2-1 draw
Arc ring, 2-2 dead rings, 2-3 dynodes, 2-4 dynode inner sleeves, 2-5 dynode overcoats, 3 cathode portions, 3-1 negative electrodes
Shell, 3-2 cathode sheaths, 3-3 negative electrodes, 3-3a central water-cooling pipes, 3-3b cathode blocks, 3-3c cathode taps, 3-3d are compressed
Part, 3-4 negative electrode dead rings, 3-5 negative electrode hold-down rings, 4 powder feeding parts, 4-1 powder feeding pipes, 4-2 powder-feeding nozzles.
Embodiment
In order to preferably illustrate the utility model, now by taking three negative electrode laminar flow plasma powder spheroidization devices as an example,
Specific embodiment of the present utility model is described in detail with reference to accompanying drawing.
Three negative electrode laminar flow plasma powder spheroidization device such as accompanying drawing 1 disclosed in the utility model, described in 2, by anode portion
Point（1）, dynode part（2）, cathode portion（3）With powder feeding part（4）Composition：
As described in accompanying drawing 2, anode part（1）By anode casing（1-1）, anode（1-2）, holddown plate（1-3）Deng composition,
Anode casing（1-1）, anode（1-2）, holddown plate（1-3）Connected by bolt presses；Anode（1-2）Structure is shown in accompanying drawing 4；
As described in accompanying drawing 3, dynode part（2）By arc ring（2-1）, dead ring（2-2）, dynode（2-3）, dynode
Inner sleeve（2-4）, dynode overcoat（2-5）Deng composition；Arc ring（2-1）, dead ring（2-2）, dynode（2-3）, in dynode
Set（2-4）, dynode overcoat（2-5）, cathode portion（3）It is connected successively；Dynode part and cathode portion by dynode outside
Set（2-5）It is connected；Dynode（2-3）With anode（1-2）Pass through dead ring（2-2）Connection；Cathode portion（3）, dynode part
（2）With anode casing（1-1）It is connected successively；
As described in accompanying drawing 3, cathode portion（3）By cathode shell（3-1）, cathode sheath（3-2）, negative electrode（3-3）, negative electrode fastening
Ring（3-4）, negative electrode hold-down ring（3-5）Deng composition；Cathode shell（3-1）, cathode sheath（3-2）, negative electrode（3-3）, negative electrode dead ring
（3-4）It is sequentially connected；Negative electrode hold-down ring（3-5）With cathode sheath（3-2）Contact, and and cathode shell（3-1）It is connected；Wherein, institute
The negative electrode stated（3-3）By central water-cooling pipe（3-3a）, cathode block（3-3b）, cathode taps（3-3c）, compressing member（3-3d）Composition, in
Heart water cooling tube（3-3a）, cathode block（3-3b）, cathode taps（3-3c）, compressing member（3-3d）It is connected successively；
As described in accompanying drawing 2, powder feeding part（4）By powder feeding pipe（4-1）And powder-feeding nozzle（4-2）Composition；Powder feeding pipe（4-1）With
Powder-feeding nozzle（4-2）It is connected successively；Powder feeding part（4）Pass through powder feeding pipe（4-1）With anode casing（1-1）It is connected.
The connection in the device water route：Cooling water is through cathode block all the way（3-3b）, flow into central water-cooling pipe（3-3a）Cooling is cloudy
Cartridge（3-3c）Afterwards, cathode block is flowed out（3-3b）Through cathode sheath（3-2）, flow into cathode shell（3-1）In, then through dynode inner sleeve
（2-4）, it is flowed into anode casing（1-1）Inside, as shown in Figure 3.Another way cooling water is from anode casing（1-1）Intake tunnel
Flow into, through anode（1-2）Flow into anode casing（1-1）It is interior, anode casing is flowed out in the lump with water before all the way（1-1）Water outlet
Passage, final reflux tank, as shown in Figure 2.
The connection of the device gas circuit：Working gas is from cathode shell（3-1）Air inlet pipe enter, through cathode sheath（3-2）On
Inlet channel enter compressing member（3-3d）On inlet channel, subsequently into generator workspace.
The connection of the device circuit：Anode（1-2）Connect the positive pole of power supply, cathode block（3-3b）On water-cooled electric cable joint connect
Power cathode, arc ring（2-1）Connect the arc end of power supply.
Specific implementation step：1）First, regulation gas valve is passed through working gas, and gas flow is controlled by flowmeter, and
Check the air-tightness of generator；2）Open cooling water, checking device whether leak, it is ensured that can normal work；3）Turn on the power,
Apply high-frequency and high-voltage between negative electrode and arc ring, puncture two interpolars, produce electric arc；4）High-frequency and high-voltage is disconnected, applies direct current
Pressure, makes electric arc burn away, generator normal work.
Finally it is to be appreciated that above case study on implementation is merely to illustrate technical scheme and unrestricted, this area skill
Art personnel should be appreciated that either equivalent substitution of being modified to technical scheme, without departing from spirit of the invention
And scope, it all should cover among protection scope of the present invention.
Claims (7)
- A kind of 1. more negative electrode laminar flow plasma powder spheroidization devices, it is characterised in that：It includes common anode part（1）、 Around multiple dynode parts of central distribution（2）With multiple cathode portions（3）, center powder feeding part（4）；Described anode part（1）By anode casing（1-1）, anode（1-2）, holddown plate（1-3）Deng composition, anode casing （1-1）, anode（1-2）, holddown plate（1-3）Connected by bolt presses；Described anode（1-2）Side end face it is uniform aperture identical arc channel and converge at one, and processed at convergence In horn-like nozzle arrangements, it is provided with and powder feeding part at center（4）The circular hole that gap coordinates, side is screw type cooling water Groove；Described dynode part（2）By arc ring（2-1）, dead ring（2-2）, dynode（2-3）, dynode inner sleeve（2-4）、 Dynode overcoat（2-5）Deng composition；Arc ring（2-1）, dead ring（2-2）, dynode（2-3）, dynode inner sleeve（2-4）, in Compole overcoat（2-5）It is connected successively；Dynode part（2）With cathode portion（3）Pass through dynode overcoat（2-5）It is connected；It is middle Pole part（2）With anode（1-2）Pass through dead ring（2-2）Connection；Cathode portion（3）, dynode part（2）With anode casing （1-1）It is connected successively；Described cathode portion（3）By cathode shell（3-1）, cathode sheath（3-2）, negative electrode（3-3）, negative electrode dead ring（3-4）, it is cloudy Pole hold-down ring（3-5）Deng composition；Cathode shell（3-1）, cathode sheath（3-2）, negative electrode（3-3）, negative electrode dead ring（3-4）Connect successively Connect；Negative electrode hold-down ring（3-5）With cathode sheath（3-2）Contact, and and cathode shell（3-1）It is connected；Wherein, described negative electrode（3- 3）By central water-cooling pipe（3-3a）, cathode block（3-3b）, cathode taps（3-3c）, compressing member（3-3d）Composition, central water-cooling pipe（3- 3a）, cathode block（3-3b）, cathode taps（3-3c）, compressing member（3-3d）It is connected successively；Described powder feeding part（4）By powder feeding pipe（4-1）And powder-feeding nozzle（4-2）Composition；Powder feeding pipe（4-1）And powder-feeding nozzle （4-2）It is connected successively；Powder feeding part（4）Pass through powder feeding pipe（4-1）With anode casing（1-1）It is connected.
- A kind of 2. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：Share one Individual anode（1-2）, dynode part（2）And cathode portion（3）Quantity is identical and adjustable.
- A kind of 3. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：The present apparatus Simply one embodiment, dynode（2-3）Number can be increased or decreased according to the requirement of power.
- A kind of 4. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：Anode （1-2）On along peripheral direction, uniformly multiple axial lines converge at the arc channel of anode nozzle axis same position, arc channel Axis is in X ° with anode nozzle axis, the corresponding dynode part of each arc channel（2）And cathode portion（3）.
- A kind of 5. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：Described Anode casing（1-1）The uniform big hole in side end face communicates with center hole；Staggered sideways it is uniform intake tunnel and backwater lead to Road.
- A kind of 6. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：Described Cathode shell（3-1）Side opening position is provided with air inlet pipe, is welded to each other and is integrated.
- A kind of 7. more negative electrode laminar flow plasma powder spheroidization devices according to claim 1, it is characterised in that：Described Cathode taps（3-3c）Inlayed to be connected by tungsten electrode head and tungsten electrode seat and formed, tungsten electrode head material is tungsten alloy and is half close to anode one end Spherical shape, tungsten electrode seat material are red copper.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124814A (en) * | 2017-06-20 | 2017-09-01 | 四川大学 | A kind of many negative electrode laminar flow plasma powder spheroidization devices |
| CN109618483A (en) * | 2019-01-07 | 2019-04-12 | 中国科学院合肥物质科学研究院 | A kind of multiple arc plasma body generator |
| CN110708852A (en) * | 2019-09-25 | 2020-01-17 | 清华大学 | Plasma gun |
-
2017
- 2017-06-20 CN CN201720714519.5U patent/CN206894987U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124814A (en) * | 2017-06-20 | 2017-09-01 | 四川大学 | A kind of many negative electrode laminar flow plasma powder spheroidization devices |
| CN109618483A (en) * | 2019-01-07 | 2019-04-12 | 中国科学院合肥物质科学研究院 | A kind of multiple arc plasma body generator |
| CN110708852A (en) * | 2019-09-25 | 2020-01-17 | 清华大学 | Plasma gun |
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