CN101518823A - Non-contact segmented metal wire electrical explosion method ultra fine powder preparing device - Google Patents
Non-contact segmented metal wire electrical explosion method ultra fine powder preparing device Download PDFInfo
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- CN101518823A CN101518823A CN200810186037A CN200810186037A CN101518823A CN 101518823 A CN101518823 A CN 101518823A CN 200810186037 A CN200810186037 A CN 200810186037A CN 200810186037 A CN200810186037 A CN 200810186037A CN 101518823 A CN101518823 A CN 101518823A
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Abstract
The invention relates to an ultra fine powder preparing device by a non-contact segmented metal wire electrical explosion method, which comprises an explosion chamber 8 on which a wire feeder 1 and a powder gathering unit 3 are arranged, and is characterized in that the explosion chamber 8 is also provided with a coaxial conductive device 6 which is connected with a high voltage generating device 7. The device adopts the metal wire and electrode non-contact electrical explosion method to prepare ultra fine powder so as to ensure the purity of the ultra fine powder. The device avoids ablation of electrodes, discharges unexploded short wires and fragments through a lower electrode, cannot generate 'accumulated tumors', and can continuously perform the metal wire electrical explosion process so as to improve the productivity. Meanwhile, the device facilitates even release of electric energy of a high electric field to metal wires, so that the particle size distribution of the ultra fine powder is more even. The device has the advantages that the device has simple and convenient operation and high production efficiency reaching 1.2 kilograms per hour; electrode replacement is simple and convenient to ensure the purity of the powder; and the particle size distribution of the metal powder generated by the device is even, and the mean particle size is below 50 nm.
Description
Technical field
The present invention relates to be used to be applied to prepare the technical field of submicron particles such as superfine metal and alloy, super-fine metal oxide, superfine metal nitride, relate in particular to a kind of non-contact segmented metal wire electrical explosion method ultra fine powder preparing device.
Background technology
In the prior art, the method for preparing superfine powder is a lot, and blasting is wherein a kind of, blasting has the energy conversion rate height, ultrafine metal powders even particle size distribution, the purity height of preparation, pollution-free, can prepare advantage such as high-melting-point insoluble metal superfine powder and be subjected to people day by day and pay close attention to.
Disclosed blasting prepares superfines equipment two kinds of structures, and a kind of is by wire feeder wire to be sent into electrode fully to contact, and controls high-voltage switch gear then and applies high voltage realization blast to electrode.Patent 00261102.3 adopts this structure, and the main deficiency of this structure is that production efficiency is subjected to the wire feed rate influence.Patent 200320103357.X had provided a kind of linkage type blasting sodium metal ground rice producing equipment afterwards, this equipment adopts independently plasma discharge switch etc. of the uniform wire feed system of 4-6 independences and 4-6, production efficiency improves 4-6 times, but still is subjected to certain limitation.Simultaneously; there has been the electrode erosion phenomenon in the structure of this wire and electrode contact explositions; the part that wire contacts with electrode can not be exploded to remain in and be formed " buildup " on the electrode; influence follow-up smooth feeding wiry and fully contact; need during production often to shut down clearing electrode, thereby influence production efficiency.
Chinese patent 200420012095.0 discloses second kind of structure, and wire segments tumbles and feeds high voltage between two electrodes then and make wire blast, increases striking magnet in the electric detonation district.Silk section explosion time striking magnet draws back electrode, thereby makes the wire and the electrode separation that contact with each other prevent " buildup " on the electrode.But because the inertia of electromagnet, wire and electrode separation process are slower, and it is complicated that the existence of the magnet of striking is simultaneously changed electrode, is unfavorable for production different kinds of metals superfines.
Take a fancy to from structure, state all more complicated of two kinds of method structures, production is had tangible adverse effect, mainly yield poorly, the cost height, the fault rate height, the influence of electrode pair powder purity is bigger when producing different nano metal powders.
Summary of the invention
The objective of the invention is to provides non-contact segmented metal wire electrical explosion method ultra fine powder preparing device at defective of the prior art, has effectively overcome the described a series of problems of background technology.
The technical solution adopted for the present invention to solve the technical problems is: described non-contact segmented metal wire electrical explosion method ultra fine powder preparing device, include explosion chamber 8, explosion chamber 8 is provided with wire feeder 1 and powder collection device 3, its characteristics are: described explosion chamber 8 also is provided with coaxial conductive device 6, and coaxial conductive device 6 links to each other with high pressure generating apparatus 7.
The present invention compares with background technology, and the useful effect that has is: described non-contact segmented metal wire electrical explosion method ultra fine powder preparing device, it adopts a kind of wire and the non-contacting blasting of electrode to prepare superfine powder equipment, can guarantee the purity of superfines.This equipment is avoided electrode erosion, and unexploded short silk and fragment are discharged by bottom electrode, can not produce " buildup ", wire electric detonation process is carried out continuously, thereby improved productivity ratio.Simultaneously, be convenient to high electric field wire is evenly discharged electric energy, make the superfines size distribution more even.It is easy and simple to handle, and the production efficiency height per hour can reach 1.2 kilograms; Electrode is changed simple and convenient, can guarantee the powder degree of purity; The metal dust even particle size distribution that this equipment produces, particle mean size is below 50nm.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present invention;
Fig. 2 is the structural principle schematic diagram of coaxial conductive device 6 of the present invention.
Among the figure: 1. wire feeder, 2. observation window, 3. powder collection device, 4. air valve, 5. vavuum pump, 6. coaxial conductive device, 7. high pressure generating apparatus, 8. explosion chamber, 9. top electrode, 10. top electrode support body, 11. bottom electrodes, 12. bottom electrode support bodies, 13. fishbolt, 14. supports, 15. conductive shafts, 16. spacer, 17. conductive sleeves, 18. connecting plates; C. energy-storage capacitor, T. high-tension transformer, D. high voltage silicon rectifier stack, R. current-limiting resistance.
The specific embodiment
As shown in Figure 1, 2, described non-contact segmented metal wire electrical explosion method ultra fine powder preparing device, include explosion chamber 8, explosion chamber 8 is provided with wire feeder 1 and powder collection device 3, its characteristics are: described explosion chamber 8 also is provided with coaxial conductive device 6, and coaxial conductive device 6 links to each other with high pressure generating apparatus 7.
Also be provided with observation window 2, vavuum pump 5 on the described explosion chamber 8 and be used to feed the air valve 4 of protective gas.Coaxial conductive device 6 includes conductive shaft 15 and conductive sleeve 17, is provided with spacer 16 between conductive shaft 15 and the conductive sleeve 17, and conductive sleeve 17 links to each other with support 14, and support 14 is provided with top electrode support body 10, and top electrode 9 is arranged on the top electrode support body 10; Conductive shaft 15 links to each other with connecting plate 18, and bottom electrode support body 12 is fixedly mounted on the connector 18 by fishbolt 13, and bottom electrode support body 12 is provided with the bottom electrode 11 corresponding with top electrode 9.High pressure generating apparatus 7 includes high-tension transformer T, output one end of high-tension transformer T joins by high voltage silicon rectifier stack D and current-limiting resistance R and conductive shaft 15, another termination conductive sleeve 17 of the output of high-tension transformer T, energy-storage capacitor C and measuring circuit are arranged between the output of high-tension transformer T.The wire feed diameter of wire feeder 1 is 0.2～0.4mm, and the wire feed segment length is 40～85mm; Distance between described top electrode 9 and the bottom electrode 11 is 45～90mm, voltage 6～12Kv.Coaxial conductive device 6 is arranged on the explosion chamber 8 by conductive sleeve 17.The corresponding setting of filament mouth of top electrode support body 10 and wire feeder 1.
Described non-contact segmented metal wire electrical explosion method ultra fine powder preparing device, it adopts a kind of wire and the non-contacting blasting of electrode to prepare superfine powder equipment, single-phase alternating current boosts by high-tension transformer, pass through the high voltage silicon rectifier stack rectification again, charge to energy-storage capacitor, set up a high voltage electric field at upper/lower electrode, measuring circuit is measured its magnitude of voltage; Wire obtains the silk section of certain-length after by wire feeder, falls into high voltage electric field by top electrode electric detonation takes place.Wire did not directly contact with electrode when blast took place, but the plasma by the generation of the gas discharge between wire ends and the electrode conducts big electric current.Utilize the coaxial conductive device that energy-storage capacitor and upper/lower electrode are coupled together, make high-tension line length reduce, reduced the inductance of discharge loop.The bottom electrode support body is connected with the positive pole of coaxial conductive device, and its adjustable height is to adapt to different electrode spacings.In order to guarantee the degree of purity of electric detonation powder, can come the material of electrode is changed according to material wiry.
During enforcement, single-phase alternating current boosts by high-tension transformer T, passes through high voltage silicon rectifier stack D rectification again, to energy-storage capacitor C charging, sets up a high voltage electric field between top electrode 9 and bottom electrode 11, and measuring circuit is measured its magnitude of voltage; R is a current-limiting resistance, and its effect is that electric current is excessive in the restriction circuit.Coaxial conductive device 6 couples together energy-storage capacitor C and upper/lower electrode, has reduced the inductance in the discharge loop, and wherein bottom electrode support body 12 is connected with the positive pole of coaxial conductive device, and its height can transfer knot to adapt to different electrode spacings by fishbolt 13.Start 5 pairs of explosion chambers 8 of vavuum pump and vacuumize, when the vacuum of explosion chamber reaches, open air valve 4 and charge into protective gas toward explosion chamber.Then, starting high pressure generating apparatus 7 generation 8kv high pressure charges to energy-storage capacitor C, the capacitance of charging capacitor C is 8.8 μ F, start wire feeder 1 subsequently, the metal copper wire section that long 60mm diameter is 0.3mm vertically falls into high voltage electric field by gravity and explodes, distance adjustment is 65mm between the upper/lower electrode, observes by 3 pairs of indoor phenomenons of electric detonation of observation window.Powder carries out collecting packing after starting 4 pairs of blasts of powder collection device.
Claims (7)
1, non-contact segmented metal wire electrical explosion method ultra fine powder preparing device, include explosion chamber (8), explosion chamber (8) is provided with wire feeder (1) and powder collection device (3), it is characterized in that: described explosion chamber (8) also is provided with coaxial conductive device (6), and coaxial conductive device (6) links to each other with high pressure generating apparatus (7).
2, non-contact segmented metal wire electrical explosion method ultra fine powder preparing device according to claim 1 is characterized in that: also be provided with observation window (2), vavuum pump (5) on the described explosion chamber (8) and be used to feed the air valve (4) of protective gas.
3, non-contact segmented metal wire electrical explosion method ultra fine powder preparing device according to claim 1, it is characterized in that: described coaxial conductive device (6) includes conductive shaft (15) and conductive sleeve (17), be provided with spacer (16) between conductive shaft (15) and the conductive sleeve (17), conductive sleeve (17) links to each other with support (14), support (14) is provided with top electrode support body (10), and top electrode (9) is arranged on the top electrode support body (10); Conductive shaft (15) links to each other with connecting plate (18), and bottom electrode support body (12) is fixedly mounted on the connector (18) by fishbolt (13), and bottom electrode support body (12) is provided with the bottom electrode (11) corresponding with top electrode (9).
4, non-contact segmented metal wire electrical explosion method ultra fine powder preparing device according to claim 1, it is characterized in that: described high pressure generating apparatus (7) includes high-tension transformer T, output one end of high-tension transformer T joins by high voltage silicon rectifier stack D and current-limiting resistance R and conductive shaft (15), another termination conductive sleeve (17) of the output of high-tension transformer T, energy-storage capacitor C and measuring circuit are arranged between the output of high-tension transformer T.
5, according to the described non-contact segmented metal wire electrical explosion method ultra fine powder preparing device of claim 1 to 4, it is characterized in that: the wire feed diameter of described wire feeder (1) is 0.2～0.4mm, and the wire feed segment length is 40～85mm; Distance between described top electrode (9) and the bottom electrode (11) is 45～90mm, voltage 6～12Kv.
6, according to claim 1 or 3 described non-contact segmented metal wire electrical explosion method ultra fine powder preparing devices, it is characterized in that: described coaxial conductive device (6) is arranged on the explosion chamber (8) by conductive sleeve (17).
7, according to claim 1 or 3 described non-contact segmented metal wire electrical explosion method ultra fine powder preparing devices, it is characterized in that: the corresponding setting of filament mouth of described top electrode support body (10) and wire feeder (1).
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102151838A (en) * | 2011-03-05 | 2011-08-17 | 兰州理工大学 | Metal wire electrical explosion device conducting current by utilizing gas discharge |
| CN102744414A (en) * | 2012-07-13 | 2012-10-24 | 兰州理工大学 | Method for preparing nano copper lubricating material by wire electrical explosion method |
| CN103447543A (en) * | 2013-09-10 | 2013-12-18 | 兰州理工大学 | Device for preparing Nanocrystalline metal powder with continuous fibers via electric explosion |
| CN104399996A (en) * | 2014-12-30 | 2015-03-11 | 湘潭大学 | Electrical explosion device and electrical explosion preparation method of nano magnesium-aluminum powder |
| CN105234425A (en) * | 2015-11-13 | 2016-01-13 | 杨会荣 | Device and method for preparing high-melting-point metal nano powder by electrical explosion method |
| CN105537604A (en) * | 2016-02-29 | 2016-05-04 | 兰州理工大学 | Nano-powder preparation device achieved through wire clamping feeding electrical explosion method |
| CN106392091A (en) * | 2016-12-01 | 2017-02-15 | 佛山市金纳新材料科技有限公司 | Preparation equipment for metallic nano powder and use method of preparation equipment |
| CN106493379A (en) * | 2016-12-12 | 2017-03-15 | 佛山市金纳新材料科技有限公司 | A kind of 3D printing powder Preparation equipment and its using method |
| CN108161017A (en) * | 2018-01-04 | 2018-06-15 | 广东银纳科技有限公司 | It is a kind of for metal powder of 3D printing and preparation method thereof |
| CN108176852A (en) * | 2017-12-27 | 2018-06-19 | 湘潭大学 | A kind of vacuum-pumping formula explosive compaction metal powder device and its application method |
| CN108941604A (en) * | 2018-08-01 | 2018-12-07 | 浙江埃普瑞纳米材料有限公司 | A kind of preparation method of novel simple block nanometer iron powder |
| CN110116215A (en) * | 2019-05-16 | 2019-08-13 | 西安交通大学 | Use the method and device of wire discharge-induced explosion method preparation carbon coating copper nano particles |
| CN111618309A (en) * | 2020-06-04 | 2020-09-04 | 西安斯瑞先进铜合金科技有限公司 | Preparation method of copper-iron alloy nanopowder |
| CN113021156A (en) * | 2021-04-23 | 2021-06-25 | 深圳市泰道精密机电有限公司 | Production device for surface rotor of permanent magnet motor |
| CN114924173A (en) * | 2021-11-15 | 2022-08-19 | 合肥工业大学 | Transformer oil arc discharge observation and gas collection device |
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2008
- 2008-12-11 CN CN200810186037A patent/CN101518823A/en active Pending
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| CN102151838B (en) * | 2011-03-05 | 2012-09-26 | 兰州理工大学 | Metal wire electrical explosion device conducting current by utilizing gas discharge |
| CN102151838A (en) * | 2011-03-05 | 2011-08-17 | 兰州理工大学 | Metal wire electrical explosion device conducting current by utilizing gas discharge |
| CN102744414A (en) * | 2012-07-13 | 2012-10-24 | 兰州理工大学 | Method for preparing nano copper lubricating material by wire electrical explosion method |
| CN103447543B (en) * | 2013-09-10 | 2017-08-25 | 兰州理工大学 | Continuous fibers electric detonation prepares Nano metal powder device |
| CN103447543A (en) * | 2013-09-10 | 2013-12-18 | 兰州理工大学 | Device for preparing Nanocrystalline metal powder with continuous fibers via electric explosion |
| CN104399996A (en) * | 2014-12-30 | 2015-03-11 | 湘潭大学 | Electrical explosion device and electrical explosion preparation method of nano magnesium-aluminum powder |
| CN105234425A (en) * | 2015-11-13 | 2016-01-13 | 杨会荣 | Device and method for preparing high-melting-point metal nano powder by electrical explosion method |
| CN105234425B (en) * | 2015-11-13 | 2017-04-19 | 杨会荣 | Device and method for preparing high-melting-point metal nano powder by electrical explosion method |
| CN105537604A (en) * | 2016-02-29 | 2016-05-04 | 兰州理工大学 | Nano-powder preparation device achieved through wire clamping feeding electrical explosion method |
| CN106392091B (en) * | 2016-12-01 | 2018-05-11 | 佛山市金纳新材料科技有限公司 | A kind of metal nano powder Preparation equipment and its application method |
| CN106392091A (en) * | 2016-12-01 | 2017-02-15 | 佛山市金纳新材料科技有限公司 | Preparation equipment for metallic nano powder and use method of preparation equipment |
| CN106493379A (en) * | 2016-12-12 | 2017-03-15 | 佛山市金纳新材料科技有限公司 | A kind of 3D printing powder Preparation equipment and its using method |
| CN106493379B (en) * | 2016-12-12 | 2018-02-27 | 佛山市金纳新材料科技有限公司 | A kind of 3D printing powder Preparation equipment and its application method |
| CN108176852A (en) * | 2017-12-27 | 2018-06-19 | 湘潭大学 | A kind of vacuum-pumping formula explosive compaction metal powder device and its application method |
| CN108161017A (en) * | 2018-01-04 | 2018-06-15 | 广东银纳科技有限公司 | It is a kind of for metal powder of 3D printing and preparation method thereof |
| CN108941604A (en) * | 2018-08-01 | 2018-12-07 | 浙江埃普瑞纳米材料有限公司 | A kind of preparation method of novel simple block nanometer iron powder |
| CN110116215A (en) * | 2019-05-16 | 2019-08-13 | 西安交通大学 | Use the method and device of wire discharge-induced explosion method preparation carbon coating copper nano particles |
| CN111618309A (en) * | 2020-06-04 | 2020-09-04 | 西安斯瑞先进铜合金科技有限公司 | Preparation method of copper-iron alloy nanopowder |
| CN111618309B (en) * | 2020-06-04 | 2023-04-28 | 西安斯瑞先进铜合金科技有限公司 | Preparation method of copper-iron alloy nano powder |
| CN113021156A (en) * | 2021-04-23 | 2021-06-25 | 深圳市泰道精密机电有限公司 | Production device for surface rotor of permanent magnet motor |
| CN114924173A (en) * | 2021-11-15 | 2022-08-19 | 合肥工业大学 | Transformer oil arc discharge observation and gas collection device |
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Open date: 20090902 |