CN201971889U - High velocity oxy-fuel spraying (HVOF) device with controllable gas flow temperature - Google Patents
High velocity oxy-fuel spraying (HVOF) device with controllable gas flow temperature Download PDFInfo
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- CN201971889U CN201971889U CN2010206314870U CN201020631487U CN201971889U CN 201971889 U CN201971889 U CN 201971889U CN 2010206314870 U CN2010206314870 U CN 2010206314870U CN 201020631487 U CN201020631487 U CN 201020631487U CN 201971889 U CN201971889 U CN 201971889U
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- flow temperature
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Abstract
The utility model discloses a high velocity oxy-fuel spraying (HVOF) device with a controllable gas flow temperature. The HVOF device is characterized in that: a temperature control chamber with a temperature measuring instrument and a non-active cooling gas nozzle is arranged between a combustion chamber and a Laval spray pipe, so that real-time control over the gas flow temperature of the temperature control chamber is realized, powder particles can be kept in a softened state without being molten, the problems of blockage of molten particles in a gun barrel of a spray gun and the like are effectively solved, the powder particles such as carbide and the like can be prevented from being molten and decomposed, and various problems such as coating quality and the like are solved.
Description
Technical field
The utility model relates to field of thermal spray, the HVOF spray equipment that particularly a kind of gas flow temperature is controlled.
Background technology
Hypersonic flame spraying (HVOF) is a kind of New Hot Spraying Technique that grows up on the basis in common flame plating.It is to utilize that hydrocarbon to be combustion gas or hydrogen and high pressure oxygen burn in combustion chamber or special nozzle, produce high-temperature high-pressure fuel gas flame stream, in powders into flame, and produce the particle of fusing or semi-molten, thus high-speed impact formation of deposits coating on substrate surface.Owing to sprayed particle strikes substrate surface with supersonic flight, so it can obtain than common flame plating or the higher dense coating of plasma spraying bonding strength.
Two principal features of HVOF spraying are: at a high speed, thereby make sprayed particle have very high kinetic energy and very short oxidation exposure duration; Relatively low temperature.Yet although the HVOF spraying has high speed and these two distinguishing features of relative low temperature, people wish that it can further obtain lower temperature on this basis.This be because, lower temperature helps making the particle (as carbide such as WC) of spraying to remain on only softening and infusible state before striking substrate surface, effectively avoided the fusing particle in spray gun gun barrel blocking problem so on the one hand, thereby the fusion and decomposition that has also suppressed carbide has on the other hand been avoided the variety of issue of its coating quality that brings.
Summary of the invention
The utility model aims to provide under a kind of situation that can keep original HVOF spraying advantage, further reduces the HVOF spray equipment of particle temperature.The technical scheme that the utility model adopted is as follows: a kind of HVOF spray equipment, mainly form by combustion chamber, temperature-controlling chamber, De Laval noz(zle) and front end jet pipe; Wherein temperature-controlling chamber is between combustion chamber and De Laval noz(zle); The De Laval noz(zle) front end connects the front end jet pipe in order to powder particle is ejected; The combustion chamber is provided with fuel nozzle, oxygen ozzle and sparking plug, thereby in order to feed fuel and oxygen and it is lighted generation high-temperature high-pressure fuel gas flame stream; Temperature-controlling chamber is provided with temperature measurer and not active cooling gas nozzle, temperature measurer all links to each other with external control system with not active cooling gas nozzle, temperature measurer is implemented gas flow temperature in the monitoring temperature-controlling chamber, and temperature measurement result fed back to Controlling System, when temperature measurement result surpasses preset threshold, not active cooling gas nozzle is opened in Controlling System control, spray into low temperature not reactive gas to reduce gas flow temperature, when temperature measurement result when preset threshold is following, not active cooling gas nozzle is closed in Controlling System control, stops to spray into not reactive gas of low temperature; The connection section of De Laval noz(zle) and front end jet pipe is provided with powder-feeding mouth, in order to spray into the raw material powder particle.
The beneficial effects of the utility model are: by the temperature-controlling chamber with temperature measurer and not active cooling gas nozzle is set between combustion chamber and De Laval noz(zle), realized real-time control to temperature-controlling chamber's gas flow temperature, thereby effectively avoided the fusing particle in problems such as spray gun gun barrel obstructions thereby can make powder particle remain on only softening and infusible state, thereby can suppress the variety of issues such as coating quality that the fusion and decomposition of powder particle such as carbide etc. has avoided it to bring again.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
1. combustion chamber; 2. temperature-controlling chamber: 3. De Laval noz(zle): 4. front end jet pipe; 5. fuel nozzle; 6. oxygen ozzle; 7. sparking plug; 8. not active cooling gas nozzle; 9. powder-feeding mouth; 10. temperature measurer; 11. Controlling System.
Embodiment
As shown in Figure 1, HVOF spray equipment of the present utility model, mainly form, also have the routine preparation of some supersonic flame sprayers in addition, the water-cooling system (not shown) of for example installing tube wall by combustion chamber 1, temperature-controlling chamber 2, De Laval noz(zle) 3 and front end jet pipe 4; Wherein temperature-controlling chamber 2 is between combustion chamber 1 and De Laval noz(zle) 3; De Laval noz(zle) 3 front ends connect front end jet pipe 4 in order to powder particle is ejected; Combustion chamber 1 is provided with fuel nozzle 5, oxygen ozzle 6 and sparking plug 7, thereby in order to feed fuel and oxygen and it is lighted generation high-temperature high-pressure fuel gas flame stream; Temperature-controlling chamber 2 is provided with temperature measurer and not active cooling gas nozzle, temperature measurer 10 all links to each other with external control system 11 with not active cooling gas nozzle 8, temperature measurer 10 is implemented gas flow temperature in the monitoring temperature-controlling chamber, and temperature measurement result fed back to Controlling System 11, when temperature measurement result surpasses preset threshold, not active cooling gas nozzle 8 is opened in Controlling System 11 controls, spray into low temperature not reactive gas to reduce gas flow temperature, when temperature measurement result when preset threshold is following, not active cooling gas nozzle 8 is closed in Controlling System 11 controls, stops to spray into not reactive gas of low temperature; De Laval noz(zle) 3 is provided with powder-feeding mouth 9 with the connection section of front end jet pipe 4, in order to spray into the raw material powder particle.
Claims (1)
1. the HVOF spray equipment that gas flow temperature is controlled mainly is made up of combustion chamber, temperature-controlling chamber, De Laval noz(zle) and front end jet pipe; Wherein temperature-controlling chamber is between combustion chamber and De Laval noz(zle); The De Laval noz(zle) front end connects the front end jet pipe in order to powder particle is ejected; The combustion chamber is provided with fuel nozzle, oxygen ozzle and sparking plug; Temperature-controlling chamber is provided with temperature measurer and not active cooling gas nozzle, and temperature measurer all links to each other with external control system with not active cooling gas nozzle; The connection section of De Laval noz(zle) and front end jet pipe is provided with powder-feeding mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206314870U CN201971889U (en) | 2010-11-25 | 2010-11-25 | High velocity oxy-fuel spraying (HVOF) device with controllable gas flow temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206314870U CN201971889U (en) | 2010-11-25 | 2010-11-25 | High velocity oxy-fuel spraying (HVOF) device with controllable gas flow temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201971889U true CN201971889U (en) | 2011-09-14 |
Family
ID=44576996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206314870U Expired - Fee Related CN201971889U (en) | 2010-11-25 | 2010-11-25 | High velocity oxy-fuel spraying (HVOF) device with controllable gas flow temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201971889U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560326A (en) * | 2012-02-24 | 2012-07-11 | 中国科学院金属研究所 | Thermal spraying device and method for manufacturing quasicrystalline coating |
| CN104148210A (en) * | 2013-05-20 | 2014-11-19 | 金属设备有限公司 | High velocity oxy-liquid flame spray gun and process for coating thereof |
| CN105714172A (en) * | 2016-04-14 | 2016-06-29 | 国家电网公司 | Corrosion-resistant grounding grid metal ceramic coating material and preparation device and method thereof |
-
2010
- 2010-11-25 CN CN2010206314870U patent/CN201971889U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560326A (en) * | 2012-02-24 | 2012-07-11 | 中国科学院金属研究所 | Thermal spraying device and method for manufacturing quasicrystalline coating |
| CN102560326B (en) * | 2012-02-24 | 2014-05-21 | 中国科学院金属研究所 | Thermal spraying device and method for manufacturing quasicrystalline coating |
| CN104148210A (en) * | 2013-05-20 | 2014-11-19 | 金属设备有限公司 | High velocity oxy-liquid flame spray gun and process for coating thereof |
| CN104148210B (en) * | 2013-05-20 | 2017-01-11 | 金属设备有限公司 | High velocity oxy-liquid flame spray gun and process for coating thereof |
| CN105714172A (en) * | 2016-04-14 | 2016-06-29 | 国家电网公司 | Corrosion-resistant grounding grid metal ceramic coating material and preparation device and method thereof |
| CN105714172B (en) * | 2016-04-14 | 2017-08-01 | 国家电网公司 | A kind of corrosion resistant grounded screen metal ceramic coating material and its preparation facilities and method |
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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: 20110914 Termination date: 20121125 |