CN101289744A - Supersonic reaction plasma spray gun - Google Patents
Supersonic reaction plasma spray gun Download PDFInfo
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- CN101289744A CN101289744A CNA2008100477299A CN200810047729A CN101289744A CN 101289744 A CN101289744 A CN 101289744A CN A2008100477299 A CNA2008100477299 A CN A2008100477299A CN 200810047729 A CN200810047729 A CN 200810047729A CN 101289744 A CN101289744 A CN 101289744A
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Abstract
The invention provides a supersonic reactive plasma spray gun, belonging to the welding field. The spray gun mainly comprises a gun body (1), an insulator (8), a gas swirling ring (11), a cathode body (6), an in-situ reaction Laval anode nozzle (12), a fastening sleeve (3), a front fixing cap (16), a back pressing cap (14) and an insulating gasket (5), which are in the following connection mode that: the in-situ reaction Laval anode nozzle (12) is connected with the gun body (1) through the front pressing cap (16); the gas swirling ring (11) and the insulator (8) are fixed inside the gun body (1) through the fastening sleeve (3); the fastening sleeve (3) and the gun body (1) are connected through tight fit; the cathode body (6) is fixed inside the gun body (1) through the insulator (8), the fastening sleeve (3), the back pressing cap (14) and the insulating gasket (5). The in-situ reaction Laval anode nozzle (12) is in an integrated structure on which a powder feeding hole (18), a reaction gas inlet (15), an auxiliary cooling water inlet (18) and an auxiliary cooling water channel (22) are arranged. The spray gun allows in-situ synthesis and supersonic plasma spraying to be accomplished in one step, thereby realizing the high performance, high efficiency and low cost of ceramic coating spraying and the long life-span of the spray gun.
Description
Technical field
What the present invention relates to is a kind of spray gun, and particularly a kind of supersonic reaction plasma spray gun belongs to welding field.
Background technology
Utilizing plasma spraying technology to prepare various metals and ceramic coating at workpiece surface, is a kind of general technology.And as the reaction and plasma spraying of one of plasma spraying technology because its unique technology and performance characteristic, also paid attention to and develop by scholar and thermospray circle.Find the patent No.: CN 129881C, title: reaction plasma spraying reaction chamber apparatus by literature search.What this invention related to is a kind of plasma spraying reaction chamber apparatus, and its structure comprises that plasma gun and reaction chamber constitute; Reaction chamber and plasma gun are by being threaded togather; Reaction chamber is made of interior cover, overcoat, water inlet pipe, inlet pipe and powder feeding hole; Interior cover and outer tube weld together the agent structure that constitutes reaction chamber, the space of interior cover and outer inner room and the cooling segment of water inlet pipe and rising pipe anabolic reaction chamber, rising pipe and water inlet pipe are welded in the outer of reaction chamber and put, take away certain heat by flowing fast of water coolant, cooling reaction chamber, the indoor cover of inlet pipe ligation weld together with the interior cover and the overcoat of reaction chamber.This invention has solved the difficult problem that common plasma spraying is difficult to prepare dystectic ceramic coating, is mainly used in the low power plasma spraying equipment, adopts the micron order metal-powder to prepare the technology of dystectic nanocrystalline ceramics coating and powder.Yet should invention be a kind of improvement of article on plasma spraying equipment, not have the reaction and plasma spraying equipment of system truly, also not realize supersonic speed plasma spraying function.Therefore, the coating porosity of preparing is bigger, reacts insufficient, and the hardness of coating does not reach the result of expectation, thereby has limited the scope of industrial application.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of supersonic reaction plasma spray gun is provided, original position synthetic technology and supersonic speed plasma spraying technology are combined, synthetic the going on foot with supersonic speed deposition one of original position of coated material finished, make it overcome the problem of existing non-reactive plasma spray gun and the existence of easy reaction plasma spraying chamber, realized synthetic and supersonic spray coating to the original position of high-quality high-melting-point ceramic coating, reduce material cost and spraying energy consumption significantly, significantly improve production efficiency and reduce running cost, appropriate design by spray gun structure again, realize the pressure cooling of spray gun, improved spray gun work-ing life of complex reaction anode nozzle and cathode construction particularly greatly.
The present invention is achieved by the following scheme.Mainly comprise: rifle body, isolator, gas cyclone ring, cathode, reaction in Laval anode nozzle, fixing sleeve, preceding locking cap and rear pressing cap, insulation spacer.Its mode of connection: reaction in Laval anode nozzle is connected with the rifle body by front pressing cap, and gas cyclone ring and isolator are fixed on rifle body inside by fixing sleeve, and fixing sleeve is connected by wringing fit with the rifle body.Cathode is fixed on rifle body inside by isolator, fastening cap and rear pressing cap, insulation spacer.
Rifle body rear portion is provided with ion gas inlet, water inlet cable inlet, and the cathode rear portion is provided with the water outlet cable inlet, and rifle body and reaction in Laval anode nozzle belong to same anode.Cathode is by isolator, insulation spacer and the insulation of rifle body.Rifle body front end is provided with into powder inlet.
Reaction in Laval anode nozzle belongs to integral structure, is provided with powder feeding hole, reaction gas inlet, auxiliary cooling water inlet and auxiliary cooling water inlet passage thereon.React the Laval anode nozzle in position and comprise reaction chamber and Laval structure two portions.
The Forced water cooling of this invention but system belongs to two-way water inlet pressure cooling structure, one road water coolant is to enter the rifle body by the water inlet cable, two road water coolants are that the auxiliary cooling water inlet by reaction in Laval anode nozzle front end enters reaction in Laval anode nozzle inside, and react in position by reaction in Laval anode nozzle internal water channel in the cooling room of Laval anode nozzle and rifle body intersection and converge with one road water coolant, pass through the water exit of rifle body inside again, isolator enters in the cathode, enters the water outlet cable after finishing the cooling of anticathode body.Owing to adopt the two-way water inlet to force cooling structure, can make reaction in Laval anode nozzle and cathode obtain good cooling, thereby prolong negative electrode and anodic work-ing life.
During work, connect water power cable switch, circulating water pressure is adjusted to specified pressure, make water pass through the water power cable ingress and the place, reaction in Laval anode nozzle two tunnel cooling water inlets of rifle body, enter rifle body and reaction in Laval anode nozzle inside respectively, then import in reaction in Laval anode nozzle and the rifle body intermediary cooling room, enter in the cathode through the intravital outlet pipeline of rifle, isolator then, the cooling cathode, then arrive in the cooling tank, finish the process of cooling of water coolant the spray gun rifle by water outlet cable interface and water outlet cable.Open the main ion air cock, adjust its pressure and flow to stipulating parameter, main ion gas is through the ion gas inlet of rifle body, arrive through rifle body, isolator and gas cyclone ring in the contraction section of reaction in Laval anode nozzle, in the throat and expansion segment and reaction chamber through reaction in Laval anode nozzle, flow out spray gun.Open startup power supply, main ion gas reacts in position between the Laval anode nozzle ionization takes place, and finishes arc process, and plasma jet penetrates spray gun through reaction in Laval anode nozzle.Adjust main ion gas and assisting ion atmospheric pressure and flow, supply current and voltage are to stipulating parameter, adjust reaction gas flow and pressure to stipulating parameter, adjust the pressure of powder feeding gas and flow and with powder by the powder feeding gas inlet of powder feeding gas through the rifle body, the powder feeding duct of rifle body and reaction in Laval anode nozzle arrives in the expansion segment, after the heating, react in position in the Laval anode nozzle reaction chamber with reaction in gas reaction in takes place, synthetic new ceramic molten drop particle, quicken to arrive working-surface by the heating of plasma jet and form the reaction in plasma sprayed coating, finish the whole process of supersonic reaction plasma spraying.
The present invention has substantive distinguishing features and marked improvement, original position synthetic technology and supersonic speed plasma spraying technology are combined, synthetic the going on foot with supersonic speed deposition one of original position of coated material finished, make it overcome the problem of existing non-reactive plasma spray gun and the existence of easy reaction plasma spraying chamber, realized synthetic and supersonic spray coating to the original position of high-quality high-melting-point ceramic coating, reduce material cost and spraying energy consumption significantly, significantly improve production efficiency and reduce running cost, appropriate design by spray gun structure again, realize the pressure cooling of spray gun, improved spray gun work-ing life of complex reaction anode nozzle and cathode construction particularly greatly.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention includes:
Comprise: rifle body (1), isolator (8), gas cyclone ring (11), cathode (6), reaction in Laval anode nozzle (12), fixing sleeve (3), preceding locking cap (16) and rear pressing cap (14), insulation spacer (5).Its mode of connection: reaction in Laval anode nozzle (12) is connected with rifle body (1) by front pressing cap (16), gas cyclone ring (11) and isolator (8) are fixed on rifle body (1) inside by fixing sleeve (3), and fixing sleeve (3) is connected by wringing fit with rifle body (1).Cathode (6) is fixed on rifle body (1) inside by isolator (8), fastening cap (3) and rear pressing cap (14), insulation spacer (5).
Rifle body (1) rear portion is provided with ion gas inlet (19), water inlet cable inlet (9), and cathode (6) rear portion is provided with water outlet cable inlet (21), and rifle body (1) and reaction in Laval anode nozzle (12) belong to same anode.Cathode (6) is by isolator (8), insulation spacer (5) and rifle body (1) insulation.Rifle body (1) front end is provided with into powder inlet (17).
Reaction in Laval anode nozzle (12) belongs to integral structure, is provided with powder feeding hole (18), reaction gas inlet (15), auxiliary cooling water inlet (18) and auxiliary cooling-water duct (22) thereon.Comprise reaction chamber (14) and Laval structure (23) two portions at former reaction position Laval anode nozzle (12).
The Forced water cooling of this invention but system belongs to two-way water inlet pressure cooling structure, one road water coolant is to enter rifle body (1) by water inlet cable inlet (9), two road water coolants are that the auxiliary cooling water inlet (18) by reaction in Laval anode nozzle (12) front end enters reaction in Laval anode nozzle inside, and react Laval anode nozzle (12) in position by the inner auxiliary cooling-water duct (22) of reaction in Laval anode nozzle (12) and converge with one road water coolant with the cooling room of rifle body (1) intersection is interior, again by the inner water exit of rifle body (1), isolator (8) enters in the cathode (6), enters the water outlet cable after finishing the cooling of anticathode body (6).Owing to adopt the two-way water inlet to force cooling structure, can make reaction in Laval anode nozzle (12) and cathode (6) obtain good cooling, thereby prolong negative electrode and anodic work-ing life.
Claims (4)
1. a supersonic reaction plasma spray gun comprises: rifle body (1), isolator (8), gas cyclone ring (11), cathode (6), reaction in Laval anode nozzle (12), fixing sleeve (3), preceding locking cap (16) and rear pressing cap (14), insulation spacer (5).Its mode of connection: reaction in Laval anode nozzle (12) is connected with rifle body (1) by front pressing cap (16), gas cyclone ring (11) and isolator (8) are fixed on rifle body (1) inside by fixing sleeve (3), and fixing sleeve (3) is connected by wringing fit with rifle body (1).Cathode (6) is fixed on rifle body (1) inside by isolator (8), fastening cap (3) and rear pressing cap (14), insulation spacer (5).
2. supersonic reaction plasma spray gun according to claim 1, it is characterized in that, rifle body (1) rear portion is provided with ion gas inlet (19), water inlet cable inlet (9), cathode (6) rear portion is provided with water outlet cable inlet (21), and rifle body (1) and reaction in Laval anode nozzle (12) belong to same anode.Cathode (6) is by isolator (8), insulation spacer (5) and rifle body (1) insulation.Rifle body (1) front end is provided with into powder inlet (17).
3. supersonic reaction plasma spray gun according to claim 1, it is characterized in that, reaction in Laval anode nozzle (12) belongs to integral structure, is provided with powder feeding hole (18), reaction gas inlet (15), auxiliary cooling water inlet (18) and auxiliary cooling-water duct (22) thereon.Comprise reaction chamber (14) and Laval structure (23) two portions at former reaction position Laval anode nozzle (12).
4. supersonic reaction plasma spray gun according to claim 1, it is characterized in that, Forced water cooling but system belongs to two-way water inlet pressure cooling structure, one road water coolant is to enter rifle body (1) by water inlet cable inlet (9), two road water coolants are that the auxiliary cooling water inlet (18) by reaction in Laval anode nozzle (12) front end enters reaction in Laval anode nozzle inside, and react Laval anode nozzle (12) in position by the inner auxiliary cooling-water duct (22) of reaction in Laval anode nozzle (12) and converge with one road water coolant with the cooling room of rifle body (1) intersection is interior, again by the inner water exit of rifle body (1), isolator (8) enters in the cathode (6), enters the water outlet cable after finishing the cooling of anticathode body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100477299A CN101289744A (en) | 2008-05-16 | 2008-05-16 | Supersonic reaction plasma spray gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100477299A CN101289744A (en) | 2008-05-16 | 2008-05-16 | Supersonic reaction plasma spray gun |
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| CN101289744A true CN101289744A (en) | 2008-10-22 |
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| CNA2008100477299A Pending CN101289744A (en) | 2008-05-16 | 2008-05-16 | Supersonic reaction plasma spray gun |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954324A (en) * | 2010-09-19 | 2011-01-26 | 大连海事大学 | Plasma spray gun used for low-pressure plasma spraying |
| CN103458602A (en) * | 2013-09-05 | 2013-12-18 | 南京理工大学 | Electrode water-cooling integrated supersonic speed plasma torch |
| CN103874313A (en) * | 2014-03-06 | 2014-06-18 | 西安交通大学 | Ultrasonic plasma gun feeding powder internally |
| CN104244557A (en) * | 2014-08-11 | 2014-12-24 | 北京交通大学 | Atmosphere protection coaxial powder feeding plasma gun |
| CN106191754A (en) * | 2016-08-31 | 2016-12-07 | 中国人民解放军装甲兵工程学院 | A kind of air Supersonic Plasma Spraying device forming protection gas hood |
| CN106513198A (en) * | 2016-08-30 | 2017-03-22 | 沈裕祥 | Air plasma monofilament wire and powder composite spray gun |
| CN108165923A (en) * | 2018-03-07 | 2018-06-15 | 水利部杭州机械设计研究所 | A kind of preparation process of the high enthalpy plasma gun of novel super-high velocity of sound and WC base composite coatings |
| CN110129742A (en) * | 2019-06-24 | 2019-08-16 | 哈尔滨工业大学 | A kind of preparation method of superhard tough TiSiCN hard coat |
-
2008
- 2008-05-16 CN CNA2008100477299A patent/CN101289744A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954324A (en) * | 2010-09-19 | 2011-01-26 | 大连海事大学 | Plasma spray gun used for low-pressure plasma spraying |
| CN101954324B (en) * | 2010-09-19 | 2012-05-30 | 大连海事大学 | Plasma spray gun used for low-pressure plasma spraying |
| CN103458602A (en) * | 2013-09-05 | 2013-12-18 | 南京理工大学 | Electrode water-cooling integrated supersonic speed plasma torch |
| CN103874313A (en) * | 2014-03-06 | 2014-06-18 | 西安交通大学 | Ultrasonic plasma gun feeding powder internally |
| CN104244557A (en) * | 2014-08-11 | 2014-12-24 | 北京交通大学 | Atmosphere protection coaxial powder feeding plasma gun |
| CN106513198A (en) * | 2016-08-30 | 2017-03-22 | 沈裕祥 | Air plasma monofilament wire and powder composite spray gun |
| CN106191754A (en) * | 2016-08-31 | 2016-12-07 | 中国人民解放军装甲兵工程学院 | A kind of air Supersonic Plasma Spraying device forming protection gas hood |
| CN108165923A (en) * | 2018-03-07 | 2018-06-15 | 水利部杭州机械设计研究所 | A kind of preparation process of the high enthalpy plasma gun of novel super-high velocity of sound and WC base composite coatings |
| CN108165923B (en) * | 2018-03-07 | 2023-10-31 | 水利部杭州机械设计研究所 | Novel superhigh-speed high-enthalpy-value plasma spray gun and preparation process of WC-based composite coating |
| CN110129742A (en) * | 2019-06-24 | 2019-08-16 | 哈尔滨工业大学 | A kind of preparation method of superhard tough TiSiCN hard coat |
| CN110129742B (en) * | 2019-06-24 | 2022-03-11 | 哈尔滨工业大学 | Preparation method of superhard and tough TiSiCN hard coating |
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Open date: 20081022 |