CN201411486Y - A protection device for plasma arc and powder particle flow for plasma spray gun - Google Patents
A protection device for plasma arc and powder particle flow for plasma spray gun Download PDFInfo
- Publication number
- CN201411486Y CN201411486Y CN2009200973284U CN200920097328U CN201411486Y CN 201411486 Y CN201411486 Y CN 201411486Y CN 2009200973284 U CN2009200973284 U CN 2009200973284U CN 200920097328 U CN200920097328 U CN 200920097328U CN 201411486 Y CN201411486 Y CN 201411486Y
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- China
- Prior art keywords
- tube
- diameter
- plasma arc
- plasma
- protective tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000002245 particle Substances 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 abstract description 19
- 238000005507 spraying Methods 0.000 abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001012 protector Effects 0.000 description 17
- 230000008602 contraction Effects 0.000 description 8
- 238000007750 plasma spraying Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010288 cold spraying Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
- 239000012720 thermal barrier coating Substances 0.000 description 1
Images
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- Coating By Spraying Or Casting (AREA)
Abstract
本实用新型公开了一种等离子喷枪用等离子弧与粉末粒子流的保护装置，由装置本体构成，所述装置本体包括保护管，所述保护管由依次设置为收缩部、喉管部和扩张部一体结构构成，所述保护管外围设置有气体入口，所述保护管与外套管之间设置有水冷空腔，所述外套管外围设置有进水口和出水口。保护管的一端与喷枪相连接。由于保护管为一先收缩后扩张的具有特殊形状的管，可以机械隔绝大气以防止大气卷入等离子弧中，其次，通过保护气入口可以向保护管内充入惰性气体或其他气体，气流中可含粉末或液体粒子，可降低或提高等离子弧的温度、调节喷涂气氛的氧化性与还原性并进一步防止大气中的氧气卷入至等离子弧中。
The utility model discloses a plasma arc and powder particle flow protection device for a plasma spray gun. An integral structure, a gas inlet is provided on the periphery of the protection tube, a water cooling cavity is provided between the protection tube and the outer casing, and a water inlet and a water outlet are arranged on the periphery of the outer casing. One end of the protection tube is connected with the spray gun. Since the protective tube is a tube with a special shape that shrinks first and then expands, it can mechanically isolate the atmosphere to prevent the atmosphere from being involved in the plasma arc. Secondly, the protective tube can be filled with inert gas or other gases through the protective gas inlet. Containing powder or liquid particles, it can reduce or increase the temperature of the plasma arc, adjust the oxidation and reduction of the spraying atmosphere and further prevent the oxygen in the atmosphere from being involved in the plasma arc.
Description
Technical field
The utility model relates to field of thermal spray, and particularly a kind of plasma gun flows protector with plasma arc and powder particle.
Background technology
Thermospray is that material (powder, wire rod etc.) is quickened to form the particle flux with certain temperature, speed through heating, and high-speed impact solidifies a kind of top coat technology of back formation of deposits upper layer on matrix surface through the flattening quick cooling to matrix surface.Hot-spraying techniques because have the production efficiency height, advantage is subjected to people's such as the spray material scope is wide, technology is easy, the coatings applications scope is wide extensive attention.Plasma spraying technology in the hot-spraying techniques obtained to use in the sixties, had realized that refractory metal material (as W, Mo) and oxide ceramic material are (as Al
2O
3, TiO
2, ZrO
2) spraying, and improved the density and the bonding strength of coating.Subsequently, with high energy, at a high speed, efficiently be target high energy plasma spraying equipment (Chinese patent: CN101168830, CN1688735, CN1775994, CN201172684), low-voltage plasma spraying equipment (Chinese patent: CN101126144) and the steady plasma spraying equipment of high-power liquid succeed in developing, make the quality of coating and spray efficiency obtain further raising.Wherein low-voltage plasma spraying equipment sprays in that enclosed vacuum is indoor, vacuum tightness by the control vacuum chamber, charge into rare gas element or charge into reactive gas, have following three main advantages: the firstth, the temperature distribution, the length of plasma arc of control plasma arc; The secondth, the oxidisability and the reductibility of control spraying atmosphere; The 3rd is to prevent that the oxygen in the atmosphere is involved in to plasma arc.Therefore adopt density, bonding strength and the purity of low-voltage plasma spraying coatings prepared all further to be improved.Yet owing to increased vacuum chamber and be subjected to the restriction of vacuum chamber space size, improved the running cost of equipment greatly, the size of the workpiece of restriction spraying simultaneously, hinder the widespread use of low-voltage plasma spraying system, only required extra high occasion such as thermal barrier coating field to obtain certain application at present.
The utility model content
The technical problems to be solved in the utility model provides a kind of plasma gun and flows protector with plasma arc and powder particle; solve the temperature distribution of plasma arc, the length of plasma arc and the oxidisability and the bad control of reductibility of spraying atmosphere, the oxygen in the atmosphere is involved in the technical problem to the plasma arc easily.
The utility model is achieved by following technical proposals: the protector that a kind of plasma gun flows with plasma arc and powder particle; constitute by device body; described device body comprises protective tube; described protective tube constitutes by setting gradually to contraction flow region, trunnion portion and enlarged portion integrative-structure; described protective tube outer periphery is equipped with the gas inlet; be provided with the water-cooled cavity between described protective tube and the outer tube, described outer tube outer periphery is equipped with water-in and water outlet.The diameter A of described contraction flow region port is the 10-100 millimeter, and the diameter B of trunnion portion is the 3-60 millimeter, and the diameter C of enlarged portion port is the 10-150 millimeter.
The protector that a kind of plasma gun flows with plasma arc and powder particle; constitute by device body; described device body comprises protective tube; described protective tube be sectional area reduce gradually contraction-like; described protective tube outer periphery is equipped with the gas inlet; be provided with the water-cooled cavity between described protective tube and the outer tube, described outer tube outer periphery is equipped with water-in and water outlet.The diameter A of described protective tube inlet end is the 10-100 millimeter, and the diameter B of exit end is the 3-60 millimeter.
The protector that a kind of plasma gun flows with plasma arc and powder particle; constitute by device body; described device body comprises protective tube; described protective tube be sectional area increase gradually horn-like; described protective tube outer periphery is equipped with the gas inlet; be provided with the water-cooled cavity between described protective tube and the outer tube, described outer tube outer periphery is equipped with into water and water outlet.The diameter B of described protective tube inlet end is the 3-60 millimeter, and the diameter C of exit end is the 10-150 millimeter.
A kind of spray that contains described plasma arc of claim 1 and powder particle stream protector is robbed; comprise the spray gun outlet; described spray gun outlet is connected with a protector; described protector comprises protective tube; described protective tube constitutes by setting gradually to contraction flow region, trunnion portion and enlarged portion integrative-structure; described protective tube outer periphery is equipped with the gas inlet, is provided with the water-cooled cavity between described protective tube and the outer tube, and described outer tube outer periphery is equipped with water-in and water outlet.The diameter A of described contraction flow region port is the 10-100 millimeter, and the diameter B of trunnion portion is the 3-60 millimeter, and the diameter C of enlarged portion port is the 10-150 millimeter.
The beneficial effects of the utility model are: because protective tube is that the protective tube of afterwards expanding shrinks in an elder generation with special shape; can be involved in the plasma arc to prevent atmosphere by the isolated atmosphere of machinery; secondly; can in protective tube, charge into rare gas element or other shielding gas by the gas inlet; can contain powder or liquid particle in the air-flow, can reduce or improve the temperature of plasma arc, the oxidisability of regulating spraying atmosphere and reductibility and also prevent that further the oxygen in the atmosphere is involved in to plasma arc.The protective tube periphery is provided with outer tube and protective tube forms the water-cooled cavity, feeds cold water so that take away the heat that is delivered to protective tube from the plasma arc thermal source.
Description of drawings
Fig. 1 is the sectional view of the utility model protector.
Fig. 2 is the plasma gun synoptic diagram that adds the utility model protector.
Fig. 3 is the sectional view of the protector of straight pipe for pipe.
Fig. 4 is the sectional view of contraction-like protector for pipe.
Fig. 5 is the sectional view of trumpet-shaped protector for pipe.
Among the figure, 1, contraction flow region; 2, trunnion portion; 3, enlarged portion; 4, gas inlet; 5, entrance of cooling water; 6, cooling water outlet; 7, plasma gun; 8, protective tube; 9, outer tube.
Embodiment
Below in conjunction with description of drawings and specific embodiment the utility model is described in further detail.
Referring to Fig. 1 and Fig. 2; protector of the present utility model is installed in plasma gun 7 exits; one end of protective tube 8 is connected with the spray gun outlet; can be to be threaded or other mode of connection, protective tube 8 be the pipe that the special shape of afterwards expanding shrinks in an elder generation, and length is the 30-250 millimeter; comprise contraction flow region 1, trunnion portion 2 and enlarged portion 3; wherein the diameter A of contraction flow region 1 inlet is the 10-100 millimeter, and the diameter B of trunnion portion 2 is the 3-60 millimeter, and the diameter C of enlarged portion 3 outlets is the 10-150 millimeter.Protective tube 8 outer periphery are equipped with protection gas inlet 4, charge into needed all gases, can be rare gas element or other gases such as argon gas, can contain powder or liquid particle in the air-flow.Can reduce or improve the temperature of plasma arc, the oxidisability of regulating spraying atmosphere and reductibility by feeding protection gas and also prevent that further the oxygen in the atmosphere is involved in to plasma arc.The outer periphery of described protective tube 8 is equipped with outer tube 9; and form a cavity between the protective tube 8; described outer tube 9 is provided with entrance of cooling water 5, cooling water outlet 6, and water coolant is flowed through in the water-cooled cavity by importing and exporting 5,6, takes away the heat that is delivered to protective tube 8 from the plasma arc thermal source.
Be illustrated in figure 3 as the synoptic diagram of the another kind of embodiment of the utility model, wherein protective tube 8 is a straight pipe, and the protective tube inner diameter equates that the internal diameter A of pipe is the 10-100 millimeter
Be illustrated in figure 4 as the synoptic diagram of another embodiment of the utility model, wherein protective tube 8 reduce gradually for sectional area contraction-like, do not contain the trunnion portion 2 and the enlarged portion 3 of protective tube.The diameter A of protective tube 8 inlet ends is the 10-100 millimeter, and the diameter B of exit end is the 3-60 millimeter.
Be illustrated in figure 5 as the synoptic diagram of another embodiment of the utility model, wherein protective tube 8 increase gradually for sectional area horn-like, do not contain the trunnion portion 2 and the contraction flow region 1 of protective tube.The diameter B of protective tube 8 inlet ends is the 3-60 millimeter, and the diameter C of exit end is the 10-150 millimeter.
This protector is except that can be applicable to plasma spraying technology; also can be applicable to other hot-spraying techniqueies such as hypersonic flame spraying, flame plating, electric arc spraying and cold spraying etc.; protector can connect the spraying equipment of other types, plays the effect of sprayed protection line.
The utility model is not limited to the project organization described in the embodiment; its description is illustrative; and it is nonrestrictive; authority of the present utility model is limited by claim; based on present technique field personnel according to the present invention can change, the technology relevant that method such as reorganization obtains with the utility model, all in protection domain of the present utility model.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200973284U CN201411486Y (en) | 2009-06-26 | 2009-06-26 | A protection device for plasma arc and powder particle flow for plasma spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200973284U CN201411486Y (en) | 2009-06-26 | 2009-06-26 | A protection device for plasma arc and powder particle flow for plasma spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201411486Y true CN201411486Y (en) | 2010-02-24 |
Family
ID=41713373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200973284U Expired - Fee Related CN201411486Y (en) | 2009-06-26 | 2009-06-26 | A protection device for plasma arc and powder particle flow for plasma spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201411486Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618815A (en) * | 2012-05-09 | 2012-08-01 | 厦门映日光电科技有限公司 | Plasma jet-stream protective cover |
| CN104250719A (en) * | 2014-07-07 | 2014-12-31 | 北京理工大学 | Controlled atmosphere plasma spraying device for atmospheric open environment |
| CN105624604A (en) * | 2016-04-05 | 2016-06-01 | 大连理工大学 | Densification preparation method for hot spray of controllable components and structural coatings on internal surfaces of part |
-
2009
- 2009-06-26 CN CN2009200973284U patent/CN201411486Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618815A (en) * | 2012-05-09 | 2012-08-01 | 厦门映日光电科技有限公司 | Plasma jet-stream protective cover |
| CN104250719A (en) * | 2014-07-07 | 2014-12-31 | 北京理工大学 | Controlled atmosphere plasma spraying device for atmospheric open environment |
| CN104250719B (en) * | 2014-07-07 | 2016-10-26 | 北京理工大学 | Atmosphere plasma spray apparatus is controlled under air open environment |
| CN105624604A (en) * | 2016-04-05 | 2016-06-01 | 大连理工大学 | Densification preparation method for hot spray of controllable components and structural coatings on internal surfaces of part |
| CN105624604B (en) * | 2016-04-05 | 2017-12-26 | 大连理工大学 | In the densification preparation method of the controllable composition of accessory inner surface thermal spraying and structure coating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20100626 |