CN1281102C - Double anode heat plasma generator - Google Patents
Double anode heat plasma generator Download PDFInfo
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- CN1281102C CN1281102C CNB2004100695986A CN200410069598A CN1281102C CN 1281102 C CN1281102 C CN 1281102C CN B2004100695986 A CNB2004100695986 A CN B2004100695986A CN 200410069598 A CN200410069598 A CN 200410069598A CN 1281102 C CN1281102 C CN 1281102C
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- anode
- cathode
- plasma generator
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- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 238000007750 plasma spraying Methods 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 150000001247 metal acetylides Chemical class 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Plasma Technology (AREA)
Abstract
本发明公开了一种双阳极热等离子发生器，属于金属及其氧化物或碳化物的喷涂设备。该等离子发生器，包括枪体、阴极和阳极，其特征在于枪体中设有圆锥形头部的棒状阴极，阴极前面沿轴向设置两个圆筒状阳极喷嘴，即内阳极和外阳极，中间用耐高温陶瓷环绝缘连接。直流电源的正极连接在外阳极上，负极则连接在阴极上，两阳极间用转移电弧开关连接。本发明提出的热等离子发生器具有电弧稳定性好，使用寿命长的特点，尤其适于内送粉的等离子喷涂。
The invention discloses a dual-anode thermal plasma generator, which belongs to the spraying equipment for metals and their oxides or carbides. The plasma generator includes a gun body, a cathode and an anode, and is characterized in that a rod-shaped cathode with a conical head is provided in the gun body, and two cylindrical anode nozzles are arranged axially in front of the cathode, namely an inner anode and an outer anode, The middle is insulated and connected with a high temperature resistant ceramic ring. The positive pole of the DC power supply is connected to the external anode, the negative pole is connected to the cathode, and the two anodes are connected by a transfer arc switch. The thermal plasma generator proposed by the invention has the characteristics of good arc stability and long service life, and is especially suitable for plasma spraying with internal powder feeding.
Description
Technical field
The present invention relates to plasma gun, belong to the spraying equipment of spray metal, metal oxide or metal carbides.
Background technology
Plasma spraying is to utilize electric energy that gases such as argon, hydrogen or nitrogen are changed into high-temperature plasma and form plasma jet in the anode nozzle, utilize its high temperature and higher speed metal or metal oxide, metal carbides to be ejected into the surface of workpiece, form metal or its oxide, the process of carbide coating.The temperature of plasma jet and the distribution character of speed affect the porosity and the hardness of coating consumingly.And its temperature and VELOCITY DISTRIBUTION situation depend on the design feature of plasma generator, so improve the structure of plasma generator, make it to rationalize more, just become the problem of this field common concern.Plasma generator commonly used adopts pair of electrodes mostly, and promptly a negative electrode and an anode produce plasma under the DC power supply effect.In anode passages inside, because the interaction of electromagnetic force and plasma gas pulling force makes high-temperature electric arc be in the motion constantly on the anode interior surface always, the energy of plasma is constantly changed, cause the inhomogeneities of the functional coating performance that forms.The reason that produces plasma instability is a lot, with isoionic voltage, electric current, gas componant confidential relation is arranged all.In order to improve the stability of plasma, United States Patent (USP) 6215091 has proposed in anode nozzle outside, adds a coil and forms methods of magnetic field control electric arc.Through our test, this method is easy to cause between two anodes discharges, with the consequence of internal anode scaling loss.Other part United States Patent (USP) 6114649 has proposed at anode processing groove, and the method for stable arc attempts to move electric arc to outlet anode place far away, but this structure is easy to cause the scaling loss of anode, occurs the fusing copper billet in coating.
Summary of the invention
Find by studying us, improve arc voltage and help isoionic stability.Because present plasma generator adopts single negative electrode and single orificed anode structure mostly, improve arc voltage and be restricted, cause stability bad.Purpose of the present invention is exactly to have proposed single sun level is divided into two parts in order to overcome these shortcomings, the formation double anode is insulated in the centre, plasma arc is moved on the back segment anode, can under the situation that does not increase gas flow, improve arc voltage exponentially like this, make the Energy distribution of plasma be partial to the passage outside, change the inside and outside plasma temperature of passage, the distribution of enthalpy and speed etc., reach under higher intake, realize internal powder conveying plasma spraying or preparation spherical powder.
Technical solution of the present invention is achieved in that
A kind of double anode heat plasma generator, form by rifle body, negative electrode and anode, it is characterized in that original single anode is divided into two along the vertical axial incision, the centre connects with the high-temperature insulation pottery, the bar-shaped negative electrode of conical nose is set in the rifle body, in the front of negative electrode anode is set axially, the positive pole of DC power supply connects anode, link to each other with a transferred arc switch between two parts anode, the negative pole of DC power supply then inserts negative electrode.
Technical solution comprises that also the diameter of described negative electrode is 3～10mm, the internal diameter of the inner anode nozzle of close negative electrode is identical with the negative electrode diameter, outer anode nozzle is the trumpet type endoporus, its minimum diameter is identical with inner anode nozzle internal diameter, the intermediate insulation ring is the high-temperature insulation pottery, and its internal diameter size is identical with the inner anode internal diameter.
Technical solution of the present invention also comprises, the feature of the startup method of the double anode heat plasma generator that the present invention proposes also is to be used for a transferred arc switch and connects two anodes, when switch connection, be equivalent to the starting the arc of traditional single anode, after the starting the arc switch is disconnected, because high-temperature plasma conducts electricity, on the back segment anode, can regenerate the arc root of electric arc.
Compared with prior art, the advantage of the double anode heat plasma generator that the present invention proposes is: 1. plasma-arc is on the back segment anode, and the minimum arc length of plasma is guaranteed the plasma generator good stability.2. improve isoionic voltage, under same power output, can reduce plasma current, improved the useful life of plasma generator.3. isoionic temperature and power are improved, and help the internal powder conveying plasma spraying.
Description of drawings
Figure of description of the present invention has only a width of cloth, is shown among Fig. 1.
Fig. 1 is the structural representation of double anode heat plasma generator.
Among the figure: 1, DC power supply 2, transferred arc switch 3, high-temperature insulation ceramic ring 4, air inlet 5, negative electrode 6, inner anode 7, outer anode 8, rifle body
Embodiment
A kind of double anode plasma gun as shown in the figure, wherein the positive pole of 1 DC power supply connects outer anode 7 simultaneously and connects inner anode 6 by transferred arc switch 2, and off switch 2 during striking, cut-off switch 2 again after waiting to light, plasma arc moves to outer anode 7.The negative pole of DC power supply 1 connects negative electrode 5, and negative electrode 5 is the passage 4 of working gas with the gap of rifle body 8, and high-temperature insulation ceramic ring 3 is divided into two anode, is connected by the transferred arc switch therebetween.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100695986A CN1281102C (en) | 2004-07-23 | 2004-07-23 | Double anode heat plasma generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100695986A CN1281102C (en) | 2004-07-23 | 2004-07-23 | Double anode heat plasma generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1589088A CN1589088A (en) | 2005-03-02 |
| CN1281102C true CN1281102C (en) | 2006-10-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100695986A Expired - Fee Related CN1281102C (en) | 2004-07-23 | 2004-07-23 | Double anode heat plasma generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN1281102C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100505138C (en) * | 2005-08-18 | 2009-06-24 | 中国科学院电子学研究所 | A dual-anode electric vacuum tube and assembly method |
| CN102625561B (en) * | 2012-03-23 | 2014-12-31 | 成都金创立科技有限责任公司 | 200KW non-transferred arc plasma generator and arc-striking method |
| CN103269558A (en) * | 2013-06-05 | 2013-08-28 | 南京理工大学 | Anode of supersonic plasma spray gun and supersonic plasma spray gun |
| CN104302082A (en) * | 2014-02-18 | 2015-01-21 | 河北普莱斯曼金刚石科技有限公司 | Plasma torch for chemical vapor deposition |
| CN103929872B (en) * | 2014-05-10 | 2016-05-04 | 衢州昀睿工业设计有限公司 | A kind of revolving body negative electrode with cooling gilled rings |
| CN105282954A (en) * | 2014-06-06 | 2016-01-27 | 成都真火科技有限公司 | Method for enhancing stability of laminar plasma generator |
| CN105228329A (en) * | 2015-10-30 | 2016-01-06 | 中国科学院力学研究所 | A kind of method and arc plasma generator disperseing the electric arc raising generator life-span |
| CN105704903B (en) * | 2016-03-16 | 2019-03-05 | 北京交通大学 | A kind of discharge electrode structure that the vacuum plasma based on magnetic fields generates |
| CN106288787A (en) * | 2016-09-29 | 2017-01-04 | 成都真火科技有限公司 | A kind of smelting equipment utilizing laminar flow plasma |
| KR102110377B1 (en) * | 2017-11-30 | 2020-05-15 | 한국수력원자력 주식회사 | Plasma Torch with Rear-Electrode of Button-Type and Front-Electrode of Multi-Type |
| CN109538431B (en) * | 2018-10-12 | 2020-09-08 | 北京交通大学 | A vacuum arc thruster based on multi-anode structure |
| CN110181066A (en) * | 2019-07-03 | 2019-08-30 | 广东省材料与加工研究所 | High sphericity 3D printing tantalum powder, preparation method and application |
| CN110856330B (en) * | 2019-12-11 | 2025-02-07 | 重庆三峰卡万塔环境产业有限公司 | A plasma torch device using contact arc ignition method and use method thereof |
| CN111486525B (en) * | 2020-05-13 | 2025-06-17 | 江苏豪瑞达环保实业有限公司 | A plasma sterilization device for hospital exhaust system |
| CN113301703A (en) * | 2021-06-18 | 2021-08-24 | 江苏天楹等离子体科技有限公司 | Middle section structure plasma generator |
| CN113547129B (en) * | 2021-07-22 | 2023-07-28 | 湖南顶立科技有限公司 | Non-carbon brush conductive high-rotation-speed plasma rotary atomization powder making device |
| CN114059024B (en) * | 2022-01-17 | 2022-04-08 | 北京航空航天大学 | A kind of spray gun for plasma physical vapor deposition and preparation method of thermal barrier coating |
-
2004
- 2004-07-23 CN CNB2004100695986A patent/CN1281102C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1589088A (en) | 2005-03-02 |
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