CN201079755Y - Plasma spray gun - Google Patents
Plasma spray gun Download PDFInfo
- Publication number
- CN201079755Y CN201079755Y CNU2007201292784U CN200720129278U CN201079755Y CN 201079755 Y CN201079755 Y CN 201079755Y CN U2007201292784 U CNU2007201292784 U CN U2007201292784U CN 200720129278 U CN200720129278 U CN 200720129278U CN 201079755 Y CN201079755 Y CN 201079755Y
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- CN
- China
- Prior art keywords
- air
- nozzle
- distribution ring
- along
- gas
- 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 - Lifetime
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Abstract
The utility model belongs to a spraying device, and specifically relates to a plasma spraying gun. An air distribution ring (2) is arranged at the interval of an electrode tip (1) and a nozzle (6). The outside diameter of the air distribution ring (2) is smaller than the inner diameter of a cavity formed by the interval, and along the axial direction an end face of the air distribution ring (2) is connected with both sides of the interval in the axial direction. The air distribution ring (2) is provided with 2 to 8 through holes (7) along the radial direction used for communicating an air inlet (3) and the nozzle (6). Because the air occurs to rotate along an outer ring of the airflow distribution ring, and the air which enters an inner cavity of the nozzle by the through holes collides along with different directions, the ionization effect of the air is enhanced. Under the action of the rotational air, electric arcs compress towards the center and then the electric arch is prolonged and plasma air is fully heated. Therefore, the utility model has the advantage of favorable spraying effect.
Description
Technical field
The utility model belongs to spraying equipment, is specifically related to a kind of plasma gun.
Background technology
Plasma spraying is the widest and most important a kind of hot-spraying technique means of range of application, and general plasma spraying equipment is made of spray gun, rectifier power source, control system, heat-exchange system, powder feeder, water power transfer box six parts.Plasma gun is the plasma-arc generator that integrates water, electricity, gas, powder, mainly by nozzle, electrode, electrode stem, insulator, water channel is first-class forms.Plasma gun is the key of whole system, the design of spray gun and directly influence paint finishing can operate as normal and the quality of spray-on coating quality.During the spraying of common plasma gun, when gas enters into nozzle from air inlet, the eddy flow of gas can not take place, gas ionization is abundant inadequately, causes Bond Strength of Coating, hardness lower, and coating porosity is higher, and spraying effect is poor.
Summary of the invention
The purpose of this utility model is to provide a kind of gas generation eddy flow that makes, ionization more fully, thereby the plasma gun of raising spraying effect.
The utility model is achieved in that a kind of plasma gun, it comprise electrode tip, with electrode tip by insulator insulation and keep the gap nozzle, with the air inlet pipe of nozzle by described gap UNICOM; Gap location at described electrode tip and nozzle is provided with a gas distribution ring, the external diameter of gas distribution ring is less than the internal diameter of the cavity of described gap formation, the axial two sides of gas distribution ring end face joint gap vertically, gas distribution ring is used for conducting air inlet pipe and nozzle along radially being provided with 2～8 through holes.
In the utility model, because electrode tip and place, nozzle intermediate gap are provided with a gas distribution ring, the external diameter of gas distribution ring is less than the internal diameter of the cavity of described gap formation, and gas will rotate along the outer ring of distribution of air flow ring; The axial two sides of gas distribution ring end face joint gap vertically, gas distribution ring is used for conducting air inlet pipe and nozzle along radially being provided with 2～8 through holes, and like this, gas can only enter into nozzle chamber by through hole.Because gas takes place to rotate along the outer ring of distribution of air flow ring, and enter into gas the bumping of nozzle chamber by through hole along different directions, strengthened the ionisation of gas effect, thereby make spraying effect improve, in addition, in the utility model, electric arc compresses to the center under the effect of rotation gas, thereby electric arc is elongated, and makes plasma gas fully heat, and has improved spraying effect.Therefore, the utility model has the advantages that spraying effect is better.
Description of drawings
Fig. 1 is the structural representation of plasma gun of the present utility model;
Fig. 2, the schematic diagram of gas distribution ring of the present utility model.
Among the figure, 1 electrode tip, 2 gas distribution rings, 3 air inlet pipe, 4 water inlet pipes, 5 insulators, 6 nozzles, 7 through holes.
The specific embodiment
As Fig. 1～shown in Figure 2, a kind of plasma gun, it comprises electrode tip 1, with the nozzle 6 of electrode tip 1 by insulator 5 insulation and maintenance gap, with the air inlet pipe 3 of nozzle 6 by described gap UNICOM, the described nozzle outside is provided with water inlet pipe 4, gap location at described electrode tip 1 and nozzle 6 is provided with a gas distribution ring 2, the external diameter of gas distribution ring 2 is less than the internal diameter of the cavity of described gap formation, gas distribution ring 2 end face vertically connects the axial two sides in described gap, gas distribution ring 2 is used for conducting air inlet pipe 3 and nozzle 6 along radially being provided with 2～8 through holes 7.
In the utility model, the external diameter of gas distribution ring 2 is less than the internal diameter of the cavity of described gap formation, so gas will rotate along the outer ring of distribution of air flow ring; The axial two sides of gas distribution ring end face joint gap vertically, gas distribution ring is used for conducting air inlet and nozzle along radially being provided with 2～8 through holes, and like this, gas can only enter into nozzle chamber by through hole.Because gas rotates along the outer ring of distribution of air flow ring 2, and the gas that is entered into nozzle chamber by through hole has strengthened the ionisation of gas effect, thereby has made spraying effect improve along the bumping of different directions.The floating voltage that 1 of nozzle 3 and electrode tip are in addition very high, by the high-frequency arc strike device electric arc that ignites, electric arc to the center compression, is drawn the nozzle outside under the effect of strong swirling air stream, and the anode region of electric arc is dropped on the jet expansion face.Arc column is elongated more than the 130mm, and arc voltage is that arc power is up to 200KW under the situation of 500A up to 400V at arc current.Under the so long arc column and high power situation, can fully heat by article on plasma gas, after the plasma gas of excessive temperature leaves nozzle, produce the high speed plasma jet.
Claims (1)
1. plasma gun, it comprises electrode tip (1), with the nozzle (6) of electrode tip (1) by insulator (5) insulation and maintenance gap, with the air inlet (3) of described nozzle (6) by described gap UNICOM, it is characterized in that: the gap location at described electrode tip (1) and nozzle (6) is provided with a gas distribution ring (2), the external diameter of gas distribution ring (2) is less than the internal diameter of the cavity of described gap formation, the axial two sides of gas distribution ring (2) end face joint gap vertically, gas distribution ring (2) is used for conducting air inlet (3) and nozzle (6) along radially being provided with 2～8 through holes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201292784U CN201079755Y (en) | 2007-08-24 | 2007-08-24 | Plasma spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201292784U CN201079755Y (en) | 2007-08-24 | 2007-08-24 | Plasma spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201079755Y true CN201079755Y (en) | 2008-07-02 |
Family
ID=39613436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201292784U Expired - Lifetime CN201079755Y (en) | 2007-08-24 | 2007-08-24 | Plasma spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201079755Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998746A (en) * | 2009-08-24 | 2011-03-30 | 通用电气公司 | Gas distribution ring assembly for plasma spray system |
| CN102361529A (en) * | 2011-09-29 | 2012-02-22 | 北京航空航天大学 | Plasma jet protective cover adopting coaxial protective gas flow |
| CN105234017A (en) * | 2015-10-27 | 2016-01-13 | 江苏大学 | Double-air-duct charge spraying device |
-
2007
- 2007-08-24 CN CNU2007201292784U patent/CN201079755Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998746A (en) * | 2009-08-24 | 2011-03-30 | 通用电气公司 | Gas distribution ring assembly for plasma spray system |
| CN102361529A (en) * | 2011-09-29 | 2012-02-22 | 北京航空航天大学 | Plasma jet protective cover adopting coaxial protective gas flow |
| CN105234017A (en) * | 2015-10-27 | 2016-01-13 | 江苏大学 | Double-air-duct charge spraying device |
| CN105234017B (en) * | 2015-10-27 | 2017-12-29 | 江苏大学 | A kind of double air channel electrostatic charged spray devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080702 |
|
| CX01 | Expiry of patent term |