CN1169410C - plasma spray gun - Google Patents
plasma spray gun Download PDFInfo
- Publication number
- CN1169410C CN1169410C CNB021377561A CN02137756A CN1169410C CN 1169410 C CN1169410 C CN 1169410C CN B021377561 A CNB021377561 A CN B021377561A CN 02137756 A CN02137756 A CN 02137756A CN 1169410 C CN1169410 C CN 1169410C
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- powder feeding
- powder
- pressure cap
- gun body
- nozzle
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Abstract
一种等离子喷涂枪属于焊接领域。主要包括：枪体、绝缘体、气体旋流环、分流器、阳极喷嘴、前压帽、阴极体、内压帽、绝缘套、外压帽，阳极喷嘴通过内压帽与枪体相连接，分流器通过紧配合固定在枪体内部，气体旋流环和绝缘体通过内压帽与枪体相连接，阴极体通过绝缘套、外压帽及绝缘体固定在枪体内部。本发明枪体采取一体化结构设计，保证了喷涂枪各部件的轴对中性及枪体结构紧凑美观，并结合分流和小孔截流设计，从结构上既提高了冷却水的流速，又保证了散热及冷却均匀性，大大提高了喷涂枪特别是阴阳极结构的寿命，设计多种喷嘴结构及特殊的送粉结构，可根据材料的性能，选用不同规格的亚音速或超音速喷嘴结构，选用内送粉或外送粉两种方式。
A plasma spray gun belongs to the field of welding. It mainly includes: gun body, insulator, gas swirl ring, shunt, anode nozzle, front pressure cap, cathode body, internal pressure cap, insulating sleeve, external pressure cap, the anode nozzle is connected with the gun body through the internal pressure cap, and the shunt The device is fixed inside the gun body through tight fit, the gas swirl ring and the insulator are connected with the gun body through the inner pressure cap, and the cathode body is fixed inside the gun body through the insulating sleeve, the outer pressure cap and the insulator. The gun body of the present invention adopts an integrated structure design, which ensures the axis alignment of each part of the spray gun and the compact and beautiful structure of the gun body, and combines the design of diversion and small hole closure, which not only improves the flow rate of cooling water structurally, but also ensures Improve heat dissipation and cooling uniformity, greatly improve the life of the spray gun, especially the anode and cathode structures, design a variety of nozzle structures and special powder feeding structures, and choose subsonic or supersonic nozzle structures of different specifications according to the performance of the material. There are two ways of feeding powder inside or outside.
Description
Technical field
What the present invention relates to is a kind of paint spray gun, and particularly a kind of plasma spray gun belongs to welding technology field.
Background technology
Utilizing plasma spraying technology to prepare various metals and ceramic coating at surface of the work, is a kind of technology of widespread usage.The rifle body of existing spray gun all is made up of multicompartment, or is divided into interior rifle body, outer rifle body, or is divided into front gun body, rear lance, and is made up of insulator.Find by literature search, application is artificial: No.701 Inst., China Space Science and Technology Group Corp., inventor: Zhang Jiaxiang, Chen Guangrong, Dong Yonghui, application number is: 99244774.7, and name is called: thermal spraying supersonic speed arc plasma spray gun relates to this kind equipment and technology, its structure is: preceding electrode is the uiform section pipe, rear electrode is solid refractory metal rod, and dock with jet pipe the rear end of preceding electrode, and the dilation and the powder feeding pipe of jet pipe are fixed together.Having on the air inlet ring with the radius angle is 10 ° to 90 ° air admission hole, and the voltage drop scope of the electric arc that forms is 100V to 600V.Spray gun of the present utility model can spray on high-melting-point materials such as alundum (Al, zirconia, tungsten carbide.This invention rifle body anode and cathode complex structure, cause neutral, cooling heat dissipation weak effect, cause the paint spray gun life-span shorter, this spray gun belongs to supersonic spray gun, and adopt outer powder feeding mode, function is less, promptly can not realize two kinds of functions of subsonic speed and supersonic speed simultaneously, can not have both internal powder conveying and outer powder feeding mode simultaneously, thereby limit the industrial applicability of paint spray gun.
Summary of the invention
The present invention is directed to deficiency of the prior art, provide a kind of many effects long-life plasma spray gun, make it overcome the conventional gun body and form the cooling effect that causes because of multicompartment, sealing is poor, thereby seriously the influence spray gun irrationality in useful life etc. of anode and cathode particularly, this rifle body is taked integrated structure design, the axle that has guaranteed each parts of paint spray gun is attractive in appearance to neutrality and lance body structure compactness, simultaneously in conjunction with the design of shunting and aperture dams, both improved the flow velocity of cooling water on the structural design, guarantee heat radiation and cooling uniformity again, improved paint spray gun life-span of anode and cathode structure particularly greatly.The present invention is achieved through the following technical solutions, mainly comprise: rifle body, insulator, gas cyclone ring, shunt, anode nozzle, front pressing cap, cathode, interior pressure cap, insulating case, outer pressure cap, its connected mode is: anode nozzle is connected with the rifle body by interior pressure cap, shunt is by being tightly fixed in rifle body inside, the gas cyclone ring is connected with the rifle body by interior pressure cap with insulator, and cathode is fixed on rifle body inside by insulating case, outer pressure cap and insulator.
The rifle body is integrated, gas circuit structure, powder feeding structure and cooling structure are located at rifle body inside, rifle body rear portion is provided with ion gas inlet, powder feeding gas inlet and water inlet cable inlet, the cathode rear portion is provided with the water outlet cable outlet, rifle body and anode nozzle belong to an anode together, and cathode is by insulator and insulating case and the insulation of rifle body.
The gas cyclone ring is three holes eddy flow+forward direction mixed admission structure both, also can be three holes direct current+forward direction mixed admission structure, can also be three hole eddy flow air intake structures.
According to the needs of engineering application and the performance of different materials, this paint spray gun both provided the subsonic speed anode nozzle of the plurality of specifications of different-diameter and different molded lines, disposed the supersonic speed anode nozzle (Laval nozzle) that is used to prepare high-performance coating again, the outlet structure of subsonic nozzle is the uiform section structure, and its throat diameter is respectively 4mm, 5mm, 6mm; The supersonic nozzle throat diameter is 4mm, and Laval (Laval) structure that its outlet structure is taper is suitable for the subsonic speed and the supersonic spray coating of various metals and ceramic material.
According to the kind of dusty spray and the difference of performance, the special powder feeding structure of this paint spray gun design, the powder feeding structure has internal powder conveying and outer powder feeding dual mode, the internal powder conveying structure comprises: internal powder conveying gas inlet, powder feeding passage, internal powder conveying hole, the internal powder conveying gas port is positioned at rifle body front portion, the powder feeding passage is positioned at rifle body inside, and the internal powder conveying hole exits is positioned at the uiform section section of the expansion segment or the subsonic nozzle of supersonic speed anode nozzle, and communicates with the powder feeding channel end.The internal powder conveying mode is to utilize powder feeding gas by the internal powder conveying hole of rifle body inside and anode nozzle powder to be sent in the expansion segment of superonic flow nozzzle or in the plasma jet in the uiform section pipe of subsonic nozzle, can reduce spray power significantly, can weaken boundary effect again, improve coating quality significantly.
Outer powder feeding mode is to utilize powder feeding gas by powder feeding hole powder to be sent in the plasma jet in anode nozzle exit.Outer powder feeding structure comprises: powder feeding screw, outer powder feeding hole, outer powder feeding structure is located at front pressing cap inside, and join by the powder feeding pipe of powder feeding screw and powder feeder, outer powder feeding hole advances the powder inlet and communicates with the end of powder feeding screw, and outer powder feeding hole dust outlet is positioned at front pressing cap uiform section endoporus section.
During work, connect water power cable switch, circulating water pressure is adjusted to authorized pressure, makes water pass through the inner water route of water power cable porch, rifle body, the shunt of rifle body, arrive in the cooling bath of anode nozzle, the cooling anodes nozzle, then pass through the outlet pipeline in the rifle body, again by insulator, cathode, the cooling cathode, then arrive in the cooling water tank, finish the cooling of cooling water paint spray gun by water outlet cable interface and water outlet cable.Open main ion gas (argon gas or nitrogen) switch, the pressure of adjustment main ion gas and flow are to stipulating parameter, main ion gas is through the ion gas inlet of rifle body, arrive in the contraction section of anode nozzle through rifle body, insulator, gas cyclone ring, through the throat and the expansion segment (or uiform section section) of anode nozzle, flow out paint spray gun.Open startup power supply, ionization takes place in main ion gas between anode nozzle and cathode, finish arc process, and plasma jet is through the inner paint spray gun that penetrates of anode nozzle.The electric current of adjustment main ion gas (argon gas or nitrogen) and auxilliary ion gas (hydrogen) pressure and flow, power supply and voltage are to stipulating parameter, adjust the pressure of powder feeding gas (nitrogen) and flow and powder is arrived (or in uiform section section) in the expansion segment by powder feeding gas through the powder feeding duct of powder feeding gas inlet, rifle body and the anode nozzle of rifle body, with quicken the surface of arrival work through the heating of plasma jet and form coating, finish the whole process of plasma spraying.
The present invention has substantive distinguishing features and marked improvement, the rifle body is taked integrated structure design, the axle that has guaranteed each parts of paint spray gun is attractive in appearance to neutrality and lance body structure compactness, simultaneously in conjunction with passing through shunting and aperture river closure design, both improved the flow velocity of cooling water, heat radiation and cooling uniformity have been guaranteed again, improved paint spray gun life-span of anode and cathode structure particularly greatly, the subsonic speed and the supersonic speed anode nozzle of design plurality of specifications, the subsonic speed and the supersonic spray coating that are suitable for various metals and ceramic material, design special powder feeding structure, can select internal powder conveying or outer powder feeding dual mode for use according to the performance of different sprayed on material.Compare with existing plasma spray gun, both enlarged the scope of spraying, reduced spray power significantly, coating that again can the processability excellence.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention mainly comprises: rifle body 1, insulator 2, gas cyclone ring 3, shunt 4, nozzle 5, front pressing cap 6, cathode 7, interior pressure cap 8, insulating case 9, outer pressure cap 10, its connected mode is: anode nozzle 5 is connected with rifle body 1 by interior pressure cap 6, shunt 4 is by being tightly fixed in rifle body 1 inside, gas cyclone ring 3 is connected with the rifle body by interior pressure cap 8 with insulator 2, and cathode 7 is fixed on rifle body 1 inside by insulating case 9 and outer pressure cap 10 and insulator 2.
Anode nozzle 5 is subsonic nozzle or superonic flow nozzzle, the outlet structure of subsonic nozzle is the uiform section structure, its throat diameter is respectively 4mm, 5mm, 6mm, and the supersonic nozzle throat diameter is 4mm, Laval (Laval) structure that its outlet structure is taper.
Outer powder feeding structure 19 comprises: powder feeding screw 22, outer powder feeding hole 23, outer powder feeding structure 19 is located at front pressing cap 6 inside, and join by the powder feeding screw 22 and the powder feeding pipe of powder feeder, outer powder feeding hole 23 advances the powder inlet and communicates with the end of powder feeding screw 22, and outer powder feeding hole 23 dust outlets are positioned at front pressing cap 6 uiform section endoporus sections.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021377561A CN1169410C (en) | 2002-10-31 | 2002-10-31 | plasma spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021377561A CN1169410C (en) | 2002-10-31 | 2002-10-31 | plasma spray gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404925A CN1404925A (en) | 2003-03-26 |
| CN1169410C true CN1169410C (en) | 2004-09-29 |
Family
ID=4749104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021377561A Expired - Lifetime CN1169410C (en) | 2002-10-31 | 2002-10-31 | plasma spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1169410C (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201106314D0 (en) | 2011-04-14 | 2011-06-01 | Edwards Ltd | Plasma torch |
| CN102896113A (en) * | 2011-07-26 | 2013-01-30 | 中国科学院微电子研究所 | A new double-dielectric barrier atmospheric pressure plasma free radical cleaning spray gun |
| CN102553748B (en) * | 2012-02-24 | 2013-12-11 | 青岛科技大学 | Ejection type atomization drying device |
| CN103796412B (en) * | 2013-12-24 | 2016-09-28 | 苏州市奥普斯等离子体科技有限公司 | A kind of atmospheric plasma spray gun device |
| CN103874313A (en) * | 2014-03-06 | 2014-06-18 | 西安交通大学 | Ultrasonic plasma gun feeding powder internally |
| CN104244557B (en) * | 2014-08-11 | 2017-02-15 | 北京交通大学 | Atmosphere protection coaxial powder feeding plasma gun |
| CN105050305B (en) * | 2015-06-13 | 2017-08-04 | 衢州昀睿工业设计有限公司 | Insulate gun rack and plasma torch |
| CN106367709B (en) * | 2016-08-31 | 2018-07-17 | 中国人民解放军装甲兵工程学院 | A kind of two sections of protections steam-hole type air Supersonic Plasma Spraying device |
| CN106191754B (en) * | 2016-08-31 | 2018-06-15 | 中国人民解放军装甲兵工程学院 | A kind of air Supersonic Plasma Spraying device for forming protection gas hood |
| CN107377531A (en) * | 2017-08-24 | 2017-11-24 | 中国汽车工业工程有限公司 | A kind of carbon dioxide snowflake cleaning nozzle device |
| CN110315178A (en) * | 2019-07-03 | 2019-10-11 | 阳江市高功率激光应用实验室有限公司 | Welding gun structure and cladding system with the welding gun structure |
| CN113677081B (en) * | 2021-08-13 | 2022-06-03 | 四川大学 | Reversed polarity plasma spraying gun for ultra-low pressure plasma spraying |
| CN114798211B (en) * | 2022-04-15 | 2024-10-29 | 厦门盛骅自动化设备有限公司 | Long-life multifunctional spray gun |
| CN115505864B (en) * | 2022-08-08 | 2023-12-29 | 中国人民解放军陆军装甲兵学院 | A small size axial powder feeding inner hole plasma spray gun |
| CN115305467B (en) * | 2022-08-31 | 2024-03-29 | 浙江柯蓝工贸有限公司 | Alloy spraying gun for manufacturing cooking pot and spraying method thereof |
-
2002
- 2002-10-31 CN CNB021377561A patent/CN1169410C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1404925A (en) | 2003-03-26 |
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