CN117587353B - Thermal spraying device - Google Patents
Thermal spraying device Download PDFInfo
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- CN117587353B CN117587353B CN202410075766.XA CN202410075766A CN117587353B CN 117587353 B CN117587353 B CN 117587353B CN 202410075766 A CN202410075766 A CN 202410075766A CN 117587353 B CN117587353 B CN 117587353B
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- oxygen
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- 238000007751 thermal spraying Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 164
- 239000000446 fuel Substances 0.000 claims abstract description 101
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000001301 oxygen Substances 0.000 claims abstract description 98
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 98
- 239000000843 powder Substances 0.000 claims abstract description 96
- 239000007789 gas Substances 0.000 claims abstract description 79
- 230000000903 blocking effect Effects 0.000 claims description 71
- 239000000463 material Substances 0.000 claims description 39
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000002737 fuel gas Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 7
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000011797 cavity material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010285 flame spraying Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to the technical field of thermal spraying, and discloses a thermal spraying device, which comprises a flame gun, wherein the flame gun comprises a gun seat and a gun rod, an oxygen pipe and a fuel pipe are arranged at the bottom of the gun seat, a mixing cavity is arranged in the gun seat, the upper ends of the oxygen pipe and the fuel pipe are communicated with the mixing cavity, and oxygen and fuel are conveyed into the mixing cavity and mixed in the mixing cavity; according to the thermal spraying device, the first trigger plate, the second trigger plate and the first trigger plate are respectively arranged in the oxygen pipe and the fuel pipe, linkage conveying of oxygen and gas fuel can be achieved, meanwhile, the air pressure in the mixing cavity is utilized to control the position relationship between the baffle plate and the powder feeding pipe and the air inlet pipe, so that the relative position relationship between the baffle plate and the powder feeding pipe and the air inlet pipe is changed, the baffle plate is utilized to control opening and closing of the powder feeding pipe and the air inlet pipe, waste of powder can be avoided, and linkage conveying of oxygen, gas fuel and powder is achieved.
Description
Technical Field
The invention relates to the technical field of thermal spraying, in particular to a thermal spraying device.
Background
Thermal spraying is a technique of depositing a finely divided metallic or nonmetallic coating material in a molten or semi-molten state onto the surface of a workpiece substrate, and includes arc spraying, plasma spraying, flame spraying, in which flame spraying is a process of igniting a gaseous fuel mixed with a coating powder, melting the powder with a flame, and depositing the melted coating material on the surface of the workpiece substrate by means of the flame.
Oxygen, gas fuel and powder inside the flame gun for flame spraying are fed by independent conveying channels, the conveying channels of oxygen, gas fuel and powder in the traditional flame gun are not related, and all have independent control valves for controlling conveying.
Disclosure of Invention
In order to solve the problem that the oxygen, the gas fuel and the powder conveying channels in the traditional flame gun are not associated with each other, if the oxygen conveying is interrupted, the gas fuel is not fully combusted, the powder hot melting treatment cannot be completed, meanwhile, the gas fuel can be diffused into the surrounding environment, and when the gas fuel is not sufficiently supplied, the powder cannot be effectively deposited on the surface of a workpiece, and meanwhile, the continuous waste of the powder can be caused, the invention is realized by the following technical scheme: the thermal spraying device comprises a flame gun, wherein the flame gun comprises a gun seat, a gun rod and an electronic igniter arranged in the gun rod, an oxygen pipe and a fuel pipe are arranged at the bottom of the gun seat, a pipe fitting for conveying oxygen is connected with the oxygen pipe, a pipe fitting for conveying gas fuel is connected with the fuel pipe, a mixing cavity is arranged in the gun seat, the upper ends of the oxygen pipe and the fuel pipe are communicated with the mixing cavity, and the oxygen and the fuel are conveyed into the mixing cavity and mixed in the mixing cavity;
the oxygen pipe is internally provided with a first trigger plate which is rotatably arranged in the oxygen pipe along the axial direction, and the fuel pipe is internally provided with a first blocking plate which is slidably arranged along the radial direction;
when the oxygen pipe conveys oxygen flow, the flow can push the trigger plate to rotate, and the trigger plate I is linked to drive the blocking plate I to move so as to separate the blocking plate I from the fuel pipe;
when no oxygen is conveyed in the oxygen pipe, the first trigger plate does not rotate, the first blocking plate is in a matched state with the fuel pipe, the pipeline inside the fuel pipe is in a closed state, and at the moment, the fuel pipe cannot be utilized to convey the gas fuel into the mixing cavity.
The powder feeding device comprises a gun seat, wherein a powder feeding pipe and an air inlet pipe are arranged on the side surface of the gun seat, a feeding cavity is arranged in the gun seat, the powder feeding pipe and the air inlet pipe are communicated with the inside of the feeding cavity, a baffle is simultaneously and slidably arranged in the radial direction of the powder feeding pipe and the air inlet pipe, the position of the baffle is controlled by the air pressure in the mixing cavity, and the opening and closing of the inner pipelines of the powder feeding pipe and the air inlet pipe are controlled by the sliding of the baffle;
when the gas conveyed by the oxygen pipe or the fuel pipe is insufficient, the air pressure in the mixing cavity is low, and at the moment, the position of the baffle can close the pipeline of the powder conveying pipe and the pipeline of the air inlet pipe, so that the powder conveying pipe cannot convey powder.
The interior of the gun rod is provided with a material conveying channel, and the mixing cavity and the material conveying cavity are communicated with the material conveying channel.
After powder conveyed by the powder conveying pipe is conveyed into the conveying channel by gas conveyed in the gas inlet pipe, the gas after mixing oxygen and gas fuel is mixed with the powder in the conveying channel, the powder is heated at high temperature after the gas fuel is ignited, and then the heated and melted powder is sprayed on the surface of a workpiece to be sprayed.
Further, a second trigger plate is installed in the fuel pipe, the second trigger plate is installed in the fuel pipe in a rotating mode along the axis direction, a second blocking plate is installed in the oxygen pipe in a sliding mode in the radial direction, the second blocking plate is located at one side, close to the mixing cavity, of the first trigger plate, and the second trigger plate is located at one side, close to the mixing cavity, of the first blocking plate;
when the fuel pipe conveys fuel gas flow, the gas flow can push the trigger plate II to rotate, the trigger plate II is driven by the trigger plate II to move, so that the trigger plate II is separated from the oxygen pipe, when no gas fuel is conveyed in the fuel pipe, the trigger plate II does not rotate, the trigger plate II is in a matched state with the oxygen pipe, a pipeline inside the oxygen pipe is in a closed state, and at the moment, oxygen cannot be conveyed into the mixing cavity by the oxygen pipe.
Further, the first trigger plate and the first blocking plate and the second trigger plate and the second blocking plate are connected through pull ropes, fixed pulleys for guiding the pull ropes are arranged in the oxygen pipe and the fuel pipe, and when the trigger plate I or the trigger plate II is pushed to rotate by air flow, the corresponding first blocking plate or the corresponding second blocking plate is pulled by the pull ropes to slide along the radial direction of the oxygen pipe or the fuel pipe;
compression springs are arranged between the first blocking plate and the second blocking plate and the inner wall of the gun seat, the compression springs are used for resetting the first blocking plate or the second blocking plate, and balls are arranged in the inner walls of the sliding ways of the first blocking plate and the second blocking plate, which are close to one side of the mixing cavity, and are used for reducing friction resistance when the first blocking plate or the second blocking plate slides.
Further, two through holes are formed in the surface of the baffle, the two through holes are respectively matched with the powder feeding pipe and the air inlet pipe, and when the baffle slides, the two through holes are simultaneously separated from or matched with the powder feeding pipe and the air inlet pipe;
the internal mounting of rifle seat has the cylinder, the inside sealing sliding mounting of cylinder has the piston rod, the piston rod with baffle fixed connection, be equipped with reset spring between piston plate and the cylinder of piston rod, the space in the cylinder of piston plate one side with the hybrid chamber communicates with each other.
The air pressure in the mixing cavity is matched with the reset spring to control the position of the piston rod and further control the position of the baffle, and the opening and closing of the internal channels of the powder feeding pipe and the air inlet pipe can be adjusted by controlling the position of the baffle.
Further, a pressure stabilizing cavity is arranged on the upper side of the mixing cavity, and a pressure valve is arranged between the pressure stabilizing cavity and the mixing cavity;
the interior of the mixing cavity is hermetically and slidingly provided with a second mixing plate, a spring is arranged between the second mixing plate and the inner wall of the mixing cavity and used for resetting the second mixing plate, a first mixing plate is fixedly arranged in the mixing cavity, and the first mixing plate and the second mixing plate are respectively positioned at two sides of the pressure valve;
the fuel pipe is communicated with the space of the first mixing plate far away from the second mixing plate, the gas fuel conveyed by the fuel pipe is conveyed into the space, the oxygen pipe is communicated with the space of the first mixing plate far away from the first mixing plate, the oxygen conveyed by the oxygen pipe is conveyed into the space, a plurality of guide pipes are arranged on the surface of the first mixing plate and penetrate through the second mixing plate, the guide pipes extend to the surface of the pipe in the space of the first mixing plate far away from the first mixing plate, air holes are formed in the surface of the guide pipes, the diffusion range of the gas fuel in the space of the oxygen can be increased, the effect of mixing the gas fuel and the oxygen is improved, and the gas fuel on the first mixing plate side is conveyed into the space of the first mixing plate far away from the first mixing plate through the guide pipes and is mixed with the oxygen;
the inside of the second mixing plate is provided with a plurality of through pipes, the through pipes extend into the space between the first mixing plate and the second mixing plate, and when the second mixing plate slides towards the first mixing plate under the action of air pressure, the channels inside the through pipes are opened.
The gas fuel is conveyed into the space where the oxygen is located through the guide pipe and is mixed with the oxygen, when the air pressure in the space, away from the pressure valve, of the first mixing plate and the second mixing plate increases to a set threshold value, the second mixing plate slides towards the pressure valve under the action of the air pressure, the sliding trigger through pipe of the second mixing plate is opened, and after the through pipe is opened, the gas after the oxygen and the gas fuel are mixed enters the space where the lower end of the pressure valve is located and enters the pressure stabilizing cavity through the pressure valve.
Further, a plurality of ejector rods are fixedly arranged on the surface of the first mixing plate, which is close to one side of the second mixing plate, and the ejector rods correspond to the through pipes;
the inside of siphunculus is equipped with the sprue and blocks up, is equipped with the spring between the inner wall of sprue and siphunculus for the reset of sprue, the two direction of mixing plate is when the slip of mixing plate one, the ejector pin can promote the sprue slides, makes the sprue with the sprue separation.
Further, an annular cavity is formed in the gun seat, the annular cavity is communicated with the pressure stabilizing cavity through a connecting channel, and an air passage is formed between the air cylinder and the connecting channel;
the annular cavity with be equipped with a plurality of gas-supply pipes between the material conveying passageway, after the gaseous entering steady voltage chamber after oxygen and gaseous fuel mixing, can enter into the annular cavity through the connecting channel, then enter into the material conveying passageway through the gas-supply pipe in, a portion of mixed gas enters into the cylinder through the air flue simultaneously, and the piston rod removes under the inside atmospheric pressure effect of cylinder to drive the baffle and slide, make two through-holes on baffle surface cooperate with powder feed pipe and intake pipe respectively.
Further, a feeding cylinder is fixedly arranged in the feeding cavity, a feeding hole is formed in the surface of the feeding cylinder, and the powder feeding pipe is connected with the feeding hole to convey powder into the feeding cylinder by using the powder feeding pipe;
the powder feeding device comprises a gun seat, a feeding cylinder, a feeding screw, a driving gear set, a motor, a hollow pipe, a feeding screw rod, a feeding shaft rod and a feeding pipe, wherein the feeding screw is rotatably arranged in the feeding cylinder;
the inner part of the material conveying cylinder is rotatably provided with a material guiding cylinder, the material guiding cylinder is positioned at one side of the feeding screw far away from the air inlet pipe, the material guiding cylinder is funnel-shaped, and a channel in the material guiding cylinder is simultaneously communicated with the hollow pipe and the material conveying channel;
the inner wall of the funnel-shaped end of the guide cylinder is provided with a plurality of guide plates, and fan blades are fixedly arranged in the channel of the guide cylinder.
The feeding screw rod conveys powder into the guide cylinder, when the air inlet pipe is communicated with the air flow, the air flow drives the guide cylinder to rotate through the fan blades, and when the guide cylinder rotates, the powder slides towards the axis direction of the guide cylinder under the guide action of the guide plate and continuously enters the air flow along with the continuous flow of the air flow.
The design of the feeding screw and the guide cylinder in the feeding cavity can realize uniform conveying of powder, and is convenient for uniformly mixing the powder in gas.
Further, annular heat dissipation cavity has been seted up to the stock inside, stock's surface mounting has inlet tube and outlet pipe, inlet tube and outlet pipe all with heat dissipation cavity intercommunication utilizes inlet tube and outlet pipe cooperation, adds the coolant liquid to the heat dissipation cavity constantly circulation for cool down the stock.
Furthermore, a conical nozzle is fixedly arranged on the surface of the gun rod, which is far away from one side of the gun seat, the material conveying channel axially penetrates through the nozzle, oxygen, gas fuel and powder are mixed in the material conveying channel, the gas fuel is sprayed out of the nozzle after being ignited, the powder is heated and melted, and the melted powder is sprayed on the surface of a workpiece to be sprayed.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the thermal spraying device, the first trigger plate, the second trigger plate and the second trigger plate are respectively arranged in the oxygen pipe and the fuel pipe, the first trigger plate and the first trigger plate can realize linkage conveying of oxygen and gas fuel, when one of the gases is interrupted, conveying of the other gas is interrupted in time, meanwhile, the relative positions between the baffle and the powder feeding pipe and the air inlet pipe are controlled by utilizing the air pressure in the mixing cavity, when the conveying of the oxygen or the gas fuel is interrupted, the relative positions between the baffle and the powder feeding pipe and the air inlet pipe are changed by utilizing the reduction of the air pressure in the mixing cavity, and the channels inside the powder feeding pipe and the air inlet pipe are closed by utilizing the baffle, so that powder waste can be avoided, and linkage feeding conveying of the oxygen, the gas fuel and the powder is realized.
2. According to the thermal spraying device, through the combined design of the first surface conduit and the ejector rod of the mixing plate in the mixing cavity and the second surface conduit and the through pipe of the mixing plate, oxygen and gas fuel can be fully mixed under pressure in the mixing cavity, so that the mixing effect of the oxygen and the gas fuel is improved, the combustion stability of the gas fuel is improved, and the phenomenon of local deflagration in flame is avoided.
3. According to the thermal spraying device, the feeding barrel, the feeding screw and the guide barrel are arranged in the feeding cavity, powder can be uniformly conveyed through the cooperation of the powder conveying pipe and the feeding barrel and the cooperation design of the air inlet pipe and the feeding screw, and the powder can be uniformly mixed into the air flow of compressed air conveyed by the air inlet pipe, so that the effect of powder feeding is improved.
Drawings
FIG. 1 is a schematic view of a flame gun according to the present invention;
FIG. 2 is a perspective view of the internal structure of the flame gun of the present invention;
FIG. 3 is a perspective view of the internal mounting structure of the mixing chamber and the feed chamber of the flame gun of the present invention;
FIG. 4 is a front view of the internal mixing chamber and feed chamber internal mounting structure of the flame gun of the present invention;
FIG. 5 is a schematic view of a partial structure of the lower part of the feeding chamber in FIG. 4 according to the present invention;
FIG. 6 is a perspective view showing the mating of the surface structures of the first and second mixing plates according to the present invention;
FIG. 7 is a front view of the mating of the surface structures of the first and second mixing plates of the present invention;
FIG. 8 is a perspective view of the internal structure of the feed cylinder in the feed chamber of the present invention;
FIG. 9 is a perspective view of the structure of the guide cylinder of the present invention;
FIG. 10 is a schematic view of the upper portion of the gun mount of FIG. 4 according to the present invention;
FIG. 11 is a schematic view of the cooperation structure of the baffle plate, the powder feeding pipe and the air inlet pipe.
In the figure: 1. a gun seat; 2. an oxygen pipe; 3. a fuel pipe; 4. a trigger plate I; 41. a first blocking plate; 5. a trigger plate II; 51. a second blocking plate; 6. a pull rope; 61. a compression spring; 7. a mixing chamber; 71. mixing plate I; 711. a conduit; 712. a push rod; 72. mixing plate II; 721. a through pipe; 722. blocking; 8. a pressure stabilizing cavity; 81. a pressure valve; 9. an annular cavity; 91. a connection channel; 92. a gas pipe; 10. a gun rod; 101. a material conveying channel; 102. a heat dissipation cavity; 11. a nozzle; 12. a feed cavity; 121. a feed delivery cylinder; 1211. a feed inlet; 122. a feed screw; 1221. a drive gear set; 123. a guide cylinder; 1231. a guide plate; 1232. a fan blade; 13. a powder feeding pipe; 14. an air inlet pipe; 15. a baffle; 151. a piston rod; 152. a cylinder; 16. a water inlet pipe; 17. and a water outlet pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples of the thermal spraying apparatus are as follows:
referring to fig. 1-11, a thermal spraying device comprises a flame gun, wherein the flame gun comprises a gun base 1, a gun rod 10 and an electronic igniter arranged in the gun rod 10, an oxygen pipe 2 and a fuel pipe 3 are arranged at the bottom of the gun base 1, a pipe for conveying oxygen is connected with the oxygen pipe 2, a pipe for conveying gas fuel is connected with the fuel pipe 3, a mixing cavity 7 is arranged in the gun base 1, the upper ends of the oxygen pipe 2 and the fuel pipe 3 are communicated with the mixing cavity 7, and oxygen and fuel are conveyed into the mixing cavity 7 and mixed in the mixing cavity 7.
The oxygen pipe 2 is internally provided with a first trigger plate 4, the first trigger plate 4 is rotatably arranged in the oxygen pipe 2 along the axial direction, the fuel pipe 3 is internally provided with a first blocking plate 41, and the first blocking plate 41 is slidably arranged along the radial direction; when the oxygen pipe 2 transmits oxygen flow, the flow can push the first trigger plate 4 to rotate, and the first trigger plate 4 is linked to drive the first blocking plate 41 to move, so that the first blocking plate 41 is separated from the fuel pipe 3.
The internally mounted of fuel pipe 3 has trigger plate two 5, and trigger plate two 5 rotates the inside of installing at fuel pipe 3 along the axis direction, and the internally mounted of oxygen pipe 2 has closure plate two 51, and closure plate two 51 radial slidable mounting, and closure plate two 51 are located trigger plate one 4 and are close to the one side of mixing chamber 7, and trigger plate two 5 is located closure plate one 41 and are close to the one side of mixing chamber 7.
The first trigger plate 4 and the first blocking plate 41 and the second trigger plate 5 and the second blocking plate 51 are connected through the pull ropes 6, fixed pulleys used for guiding the pull ropes 6 are arranged in the oxygen pipe 2 and the fuel pipe 3, and when the trigger plate 4 or the second trigger plate 5 is pushed to rotate by air flow, the corresponding first blocking plate 41 or the corresponding second blocking plate 51 is pulled by the pull ropes 6 to slide along the radial direction of the oxygen pipe 2 or the fuel pipe 3.
Compression springs 61 are arranged between the first blocking plate 41 and the second blocking plate 51 and the inner wall of the gun seat 1, the compression springs 61 are used for resetting the first blocking plate 41 or the second blocking plate 51, and balls are arranged in the inner walls of the sliding ways of the first blocking plate 41 and the second blocking plate 51, which are close to one side of the mixing cavity 7, and are used for reducing friction resistance when the first blocking plate 41 or the second blocking plate 51 slides.
When the fuel pipe 3 conveys the fuel air flow, the air flow can push the trigger plate II 5 to rotate, the trigger plate II 5 is linked to drive the blocking plate II 51 to move, so that the blocking plate II 51 is separated from the oxygen pipe 2, when no oxygen is conveyed in the oxygen pipe 2, the trigger plate I4 does not rotate, the blocking plate I41 is in a matched state with the fuel pipe 3, a pipeline inside the fuel pipe 3 is in a closed state, at the moment, the fuel pipe 3 cannot be utilized to convey the gas fuel into the mixing cavity 7, when the fuel pipe 3 does not convey the gas fuel, the trigger plate II 5 does not rotate, the blocking plate II 51 is in a matched state with the oxygen pipe 2, and the pipeline inside the oxygen pipe 2 is in a closed state, so that the oxygen cannot be conveyed into the mixing cavity 7 by using the oxygen pipe 2.
The upper side of the mixing cavity 7 is provided with a pressure stabilizing cavity 8, and a pressure valve 81 is arranged between the pressure stabilizing cavity 8 and the mixing cavity 7; the inside sealing sliding mounting of mixing chamber 7 has mixing plate two 72, is equipped with the spring between mixing plate two 72 and the inner wall of mixing chamber 7 for mixing plate two 72's reset, and mixing chamber 7's inside fixed mounting has mixing plate one 71, and mixing plate one 71 and mixing plate two 72 are located the both sides of pressure valve 81 respectively.
The fuel pipe 3 is communicated with the space of the side, far away from the mixing plate I71, of the mixing plate I72, the gas fuel conveyed by the fuel pipe 3 is conveyed into the space, the oxygen pipe 2 is communicated with the space of the side, far away from the mixing plate I71, of the mixing plate II 72, the oxygen conveyed by the oxygen pipe 2 is conveyed into the space, a plurality of guide pipes 711 are arranged on the surface of the mixing plate I71, the guide pipes 711 penetrate through the mixing plate II 72, the guide pipes 711 extend to the surface of the pipe in the space, far away from the mixing plate I71, of the mixing plate II 72, air holes are formed in the surface of the guide pipes, the diffusion range of the gas fuel in the space where the oxygen is located can be increased, the effect of mixing the gas fuel and the oxygen is improved, and the gas fuel on the side, far away from the mixing plate I71, is conveyed into the space, far away from the mixing plate I71, through the guide pipes 711, and mixed with the oxygen.
The mixing plate two 72 is internally provided with a plurality of through pipes 721, the through pipes 721 extend into the space between the mixing plate one 71 and the mixing plate two 72, and when the mixing plate two 72 slides towards the mixing plate one 71 under the action of air pressure, the channels inside the through pipes 721 are opened.
The gas fuel is delivered to the space where the oxygen is located through the conduit 711 and mixed with the oxygen, the gas pressure in the mixing chamber 7 is continuously increased along with the continuous increase of the fuel gas and the oxygen in the mixing chamber 7, when the gas pressure in the space of the first mixing plate 71 and the second mixing plate 72 far away from the pressure valve 81 is increased to a set threshold value, the second mixing plate 72 slides towards the pressure valve 81 under the action of the gas pressure, the sliding trigger through pipe 721 of the second mixing plate 72 is opened, and after the through pipe 721 is opened, the gas after the oxygen and the gas fuel are mixed enters the space where the lower end of the pressure valve 81 is located and enters the pressure stabilizing chamber 8 through the pressure valve 81.
A plurality of ejector rods 712 are fixedly arranged on the surface of the first mixing plate 71, which is close to one side of the second mixing plate 72, and the ejector rods 712 correspond to the through pipes 721; the inside of the through pipe 721 is provided with a blocking mouth and a blocking block 722, and a spring is arranged between the blocking block 722 and the inner wall of the through pipe 721 for resetting the blocking block 722, and when the second mixing plate 72 slides towards the first mixing plate 71, the ejector rod 712 can push the blocking block 722 to slide, so that the blocking block 722 is separated from the blocking mouth.
An annular cavity 9 is formed in the gun seat 1, and the annular cavity 9 is communicated with the pressure stabilizing cavity 8 through a connecting channel 91.
The side surface of the gun seat 1 is provided with a powder feeding pipe 13 and an air inlet pipe 14, the inside of the gun seat 1 is provided with a feeding cavity 12, the powder feeding pipe 13 and the air inlet pipe 14 are communicated with the inside of the feeding cavity 12, the inside of the gun rod 10 is provided with a material conveying channel 101, the ignition end of the electronic igniter is positioned in the material conveying channel 101, and the mixing cavity 7 and the feeding cavity 12 are communicated with the material conveying channel 101.
A plurality of gas delivery pipes 92 are arranged between the annular cavity 9 and the material delivery channel 101, and after the gas mixed by oxygen and gas fuel enters the pressure stabilizing cavity 8, the gas enters the annular cavity 9 through the connecting channel 91 and then enters the material delivery channel 101 through the gas delivery pipes 92.
The powder feeding pipe 13 and the air inlet pipe 14 are simultaneously and slidably provided with a baffle 15 in the radial direction, the position of the baffle 15 is controlled by the air pressure in the mixing cavity 7, and the opening and closing of the inner pipelines of the powder feeding pipe 13 and the air inlet pipe 14 are controlled by the sliding of the baffle 15.
Two through holes are formed in the surface of the baffle 15 and are respectively matched with the powder feeding pipe 13 and the air inlet pipe 14, and when the baffle 15 slides, the two through holes are separated from or matched with the powder feeding pipe 13 and the air inlet pipe 14 at the same time.
The gun seat 1 is internally provided with an air cylinder 152, an air passage is arranged between the air cylinder 152 and the connecting channel 91, a piston rod 151 is hermetically and slidably arranged in the air cylinder 152, the piston rod 151 is fixedly connected with the baffle 15, a return spring is arranged between a piston plate of the piston rod 151 and the air cylinder 152, the space inside the air cylinder 152 on one side of the piston plate is communicated with the mixing cavity 7, the air pressure in the mixing cavity 7 is matched with the return spring to control the position of the piston rod 151, and then the position of the baffle 15 is controlled, a part of mixed gas entering the connecting channel 91 enters the air cylinder 152 through the air passage, the piston rod 151 moves under the action of the air pressure in the air cylinder 152 and drives the baffle 15 to slide, so that two through holes on the surface of the baffle 15 are respectively matched with the powder feeding pipe 13 and the air inlet pipe 14.
When the oxygen pipe 2 or the fuel pipe 3 is insufficient in delivering gas, the air pressure in the mixing cavity 7 is low, and at the moment, the position of the baffle 15 closes the pipeline of the powder delivering pipe 13 and the pipeline of the air inlet pipe 14, so that the powder delivering pipe 13 cannot deliver powder.
A feeding barrel 121 is fixedly arranged in the feeding cavity 12, a feeding hole 1211 is formed in the surface of the feeding barrel 121, and a powder feeding pipe 13 is connected with the feeding hole 1211 to convey powder into the feeding barrel 121 by using the powder feeding pipe 13.
The feeding screw 122 is rotatably installed in the feeding barrel 121, a transmission gear set 1221 is installed on the surface of the feeding screw 122, gears in the transmission gear set 1221 are driven to rotate by a motor installed in the gun base 1, powder entering the feeding barrel 121 is conveyed by rotation of the feeding screw 122, a hollow pipe is arranged in a shaft rod of the feeding screw 122, and the hollow pipe is communicated with the air inlet pipe 14.
A guide cylinder 123 is rotatably arranged in the feed cylinder 121, the guide cylinder 123 is positioned on one side of the feed screw 122 far away from the air inlet pipe 14, the guide cylinder 123 is funnel-shaped, and a channel in the guide cylinder 123 is simultaneously communicated with the hollow pipe and the feed channel 101; a plurality of guide plates 1231 are installed on the inner wall of the funnel-shaped end of the guide cylinder 123, and fan blades 1232 are fixedly installed inside the channel of the guide cylinder 123.
The feeding screw 122 conveys powder into the guide cylinder 123, when the air inlet pipe 14 is communicated with air flow, the air flow drives the guide cylinder 123 to rotate through the fan blades 1232, and when the guide cylinder 123 rotates, the powder slides in the axial direction of the guide cylinder 123 under the guide effect of the guide plate 1231 and continuously enters and is mixed into the air flow along with the continuous flow of the air flow, and the design of the feeding screw 122 and the guide cylinder 123 in the feeding cavity 12 can realize uniform conveying of the powder and is convenient for uniformly mixing the powder in the air.
An annular heat dissipation cavity 102 is formed in the gun rod 10, a water inlet pipe 16 and a water outlet pipe 17 are mounted on the outer surface of the gun rod 10, the water inlet pipe 16 and the water outlet pipe 17 are communicated with the heat dissipation cavity 102, and cooling liquid is continuously and circularly added into the heat dissipation cavity 102 by utilizing the cooperation of the water inlet pipe 16 and the water outlet pipe 17 and used for cooling the gun rod 10.
After the powder conveyed by the powder conveying pipe 13 is conveyed into the conveying channel 101 by the gas conveyed by the gas conveying pipe 14, the gas after mixing the oxygen and the gas fuel is mixed with the powder in the conveying channel 101, the powder is heated at a high temperature after the gas fuel is ignited, and then the heated and melted powder is sprayed on the surface of a workpiece to be sprayed.
The surface of the gun rod 10, which is far away from the gun seat 1, is fixedly provided with a conical nozzle 11, a material conveying channel 101 axially penetrates through the nozzle 11, oxygen, gas fuel and powder are mixed in the material conveying channel 101, the gas fuel is sprayed out of the nozzle 11 after being ignited, the powder is heated and melted, and the melted powder is sprayed on the surface of a workpiece to be sprayed.
Working principle of the thermal spraying device:
the pipe fitting for conveying oxygen and the pipe fitting for conveying gas fuel are connected with the oxygen pipe 2, the pipe fitting for conveying powder is connected with the powder conveying pipe 13, the compressed air pipe fitting is connected with the air inlet pipe 14, the oxygen and the gas fuel are both conveyed into the mixing cavity 7, and the gas fuel enters the space of the side, far from the first mixing plate 71, of the second mixing plate 72 through the guide pipe 711 and is mixed with the oxygen.
When the air pressure in the space of the first mixing plate 71 and the second mixing plate 72 away from the pressure valve 81 increases to a set threshold value, the second mixing plate 72 slides towards the pressure valve 81 under the action of the air pressure, the second mixing plate 72 drives the through pipe 721 to move together, the ejector rod 712 contacts the block 722 when entering the through pipe 721, and pushes the block 722 to move, so that the block 722 is separated from the blocking opening, at this time, the spaces of the two sides of the second mixing plate 72 are communicated, and the air after mixing the oxygen and the gas fuel enters the space where the lower end of the pressure valve 81 is located and enters the pressure stabilizing cavity 8 through the pressure valve 81.
After the gas mixed by the oxygen and the gas fuel enters the pressure stabilizing cavity 8, the gas enters the annular cavity 9 through the connecting channel 91 and then enters the material conveying channel 101 through the gas conveying pipe 92, meanwhile, a part of the mixed gas enters the air cylinder 152 through the gas passage, the piston rod 151 moves under the action of the air pressure in the air cylinder 152 and drives the baffle 15 to slide, so that two through holes on the surface of the baffle 15 are respectively matched with the powder conveying pipe 13 and the gas inlet pipe 14.
The powder feeding pipe 13 conveys powder into the material conveying cylinder 121, the motor drives the material feeding screw 122 to rotate, the material feeding screw 122 conveys the powder into the material guiding cylinder 123, when the air inlet pipe 14 is connected with air flow, the air flow drives the material guiding cylinder 123 to rotate through the fan blades 1232, and when the material guiding cylinder 123 rotates, the powder slides towards the axis direction of the material guiding cylinder 123 under the guiding action of the guiding plate 1231 and continuously enters and is mixed into the air flow along with the continuous flow of the air flow.
Oxygen, gas fuel and powder are mixed in the feed passage 101, the gas fuel is sprayed from the nozzle 11 after being ignited, and the powder is subjected to a heat melting treatment, and the melted powder is sprayed on the surface of the workpiece to be sprayed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A thermal spraying device comprising a flame gun comprising a gun holder (1), a gun rod (10) and an electronic igniter mounted inside the gun rod (10), characterized in that: the oxygen pipe (2) and the fuel pipe (3) are arranged at the bottom of the gun seat (1), a mixing cavity (7) is arranged in the gun seat (1), and the upper ends of the oxygen pipe (2) and the fuel pipe (3) are communicated with the mixing cavity (7);
a first trigger plate (4) is arranged in the oxygen pipe (2), and a first blocking plate (41) is arranged in the fuel pipe (3);
when the oxygen pipe (2) conveys oxygen flow, the flow can push the first trigger plate (4) to rotate, and the first trigger plate (4) is linked to drive the first blocking plate (41) to move so as to separate the first blocking plate (41) from the fuel pipe (3);
the powder feeding device is characterized in that a powder feeding pipe (13) and an air inlet pipe (14) are arranged on the side surface of the gun seat (1), a feeding cavity (12) is arranged in the gun seat (1), the powder feeding pipe (13) and the air inlet pipe (14) are communicated with the inside of the feeding cavity (12), a baffle plate (15) is simultaneously and slidably arranged in the radial direction of the powder feeding pipe (13) and the air inlet pipe (14), the position of the baffle plate (15) is controlled by the air pressure in the mixing cavity (7), and the opening and closing of the inner pipelines of the powder feeding pipe (13) and the air inlet pipe (14) are controlled by the sliding of the baffle plate (15);
a material conveying channel (101) is arranged in the gun rod (10), and the mixing cavity (7) and the material conveying cavity (12) are communicated with the material conveying channel (101);
a second trigger plate (5) is arranged in the fuel pipe (3), a second blocking plate (51) is arranged in the oxygen pipe (2), the second blocking plate (51) is positioned on one side, close to the mixing cavity (7), of the first trigger plate (4), and the second trigger plate (5) is positioned on one side, close to the mixing cavity (7), of the first blocking plate (41);
when the fuel pipe (3) conveys fuel gas flow, the gas flow can push the second trigger plate (5) to rotate, and the second trigger plate (5) is linked to drive the second blocking plate (51) to move so as to separate the second blocking plate (51) from the oxygen pipe (2);
two through holes are formed in the surface of the baffle plate (15), the two through holes are respectively matched with the powder feeding pipe (13) and the air inlet pipe (14), and when the baffle plate (15) slides, the two through holes are simultaneously separated from or matched with the powder feeding pipe (13) and the air inlet pipe (14);
the gun seat is characterized in that an air cylinder (152) is arranged in the gun seat (1), a piston rod (151) is arranged in the air cylinder (152) in a sealing sliding manner, the piston rod (151) is fixedly connected with the baffle plate (15), a reset spring is arranged between a piston plate of the piston rod (151) and the air cylinder (152), and a space inside the air cylinder (152) at one side of the piston plate is communicated with the mixing cavity (7).
2. The thermal spray device of claim 1, wherein: the first trigger plate (4) and the first blocking plate (41) and the second trigger plate (5) and the second blocking plate (51) are connected through a pull rope (6), and when the first trigger plate (4) or the second trigger plate (5) is pushed by air flow to rotate, the pull rope (6) pulls the corresponding first blocking plate (41) or the second blocking plate (51) to slide along the radial direction of the oxygen pipe (2) or the fuel pipe (3);
compression springs (61) are arranged between the first blocking plate (41) and the second blocking plate (51) and the inner wall of the gun seat (1), and balls are arranged in the inner walls of the sliding ways, which are close to one side of the mixing cavity (7), of the first blocking plate (41) and the second blocking plate (51).
3. The thermal spray device of claim 1, wherein: the upper side of the mixing cavity (7) is provided with a pressure stabilizing cavity (8), and a pressure valve (81) is arranged between the pressure stabilizing cavity (8) and the mixing cavity (7);
the inside of the mixing cavity (7) is hermetically and slidably provided with a mixing plate II (72), a mixing plate I (71) is fixedly arranged in the mixing cavity (7), and the mixing plate I (71) and the mixing plate II (72) are respectively positioned at two sides of the pressure valve (81);
the fuel pipe (3) is communicated with the space of the side, far away from the mixing plate II (72), of the mixing plate I (71), the oxygen pipe (2) is communicated with the space of the side, far away from the mixing plate I (71), of the mixing plate II (72), a plurality of guide pipes (711) are arranged on the surface of the mixing plate I (71), and the guide pipes (711) penetrate through the mixing plate II (72);
the inside of the mixing plate II (72) is provided with a plurality of through pipes (721), the through pipes (721) extend into the space between the mixing plate I (71) and the mixing plate II (72), and when the mixing plate II (72) slides towards the mixing plate I (71) under the action of air pressure, the channels inside the through pipes (721) are opened.
4. A thermal spray apparatus as claimed in claim 3, wherein: a plurality of ejector rods (712) are fixedly arranged on the surface of the first mixing plate (71) close to one side of the second mixing plate (72), and the ejector rods (712) correspond to the through pipes (721);
and a blocking mouth and a blocking block (722) are arranged in the through pipe (721), and when the second mixing plate (72) slides towards the first mixing plate (71), the ejector rod (712) can push the blocking block (722) to slide so as to separate the blocking block (722) from the blocking mouth.
5. A thermal spray apparatus as claimed in claim 3, wherein: an annular cavity (9) is formed in the gun seat (1), the annular cavity (9) is communicated with the pressure stabilizing cavity (8) through a connecting channel (91), and an air passage is formed between the air cylinder (152) and the connecting channel (91);
a plurality of air delivery pipes (92) are arranged between the annular cavity (9) and the material delivery channel (101).
6. The thermal spray device of any one of claims 1-5, wherein: a feeding barrel (121) is fixedly arranged in the feeding cavity (12), a feeding hole (1211) is formed in the surface of the feeding barrel (121), and the powder feeding pipe (13) is connected with the feeding hole (1211);
a feeding screw (122) is rotatably arranged in the feeding barrel (121), a hollow pipe is arranged in a shaft lever of the feeding screw (122), and the hollow pipe is communicated with the air inlet pipe (14);
a guide cylinder (123) is rotatably arranged in the material conveying cylinder (121), the guide cylinder (123) is positioned at one side of the material conveying screw (122) away from the air inlet pipe (14), the guide cylinder (123) is funnel-shaped, and a channel in the guide cylinder (123) is simultaneously communicated with the hollow pipe and the material conveying channel (101);
the inner wall of the funnel-shaped end of the guide cylinder (123) is provided with a plurality of guide plates (1231), and the inside of a channel of the guide cylinder (123) is fixedly provided with fan blades (1232).
7. The thermal spray device of claim 6, wherein: annular heat dissipation cavity (102) has been seted up to stock (10) inside, the surface mounting of stock (10) has inlet tube (16) and outlet pipe (17), inlet tube (16) and outlet pipe (17) all with heat dissipation cavity (102) intercommunication.
8. The thermal spray device of claim 7, wherein: the surface of the gun rod (10) far away from one side of the gun seat (1) is fixedly provided with a conical nozzle (11), and the material conveying channel (101) axially penetrates through the nozzle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410075766.XA CN117587353B (en) | 2024-01-18 | 2024-01-18 | Thermal spraying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410075766.XA CN117587353B (en) | 2024-01-18 | 2024-01-18 | Thermal spraying device |
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| CN117587353A CN117587353A (en) | 2024-02-23 |
| CN117587353B true CN117587353B (en) | 2024-03-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0375931A2 (en) * | 1988-12-28 | 1990-07-04 | Sulzer Metco (US) Inc. | High velocity powder thermal spray method for spraying non-meltable materials |
| CN1047816A (en) * | 1989-01-17 | 1990-12-19 | 彼根-爱玛公司 | Shrouded thermal spray gun and spraying method thereof |
| CN104233176A (en) * | 2014-09-12 | 2014-12-24 | 芜湖鼎瀚再制造技术有限公司 | Supersonic flame spraying system |
| CN204455263U (en) * | 2015-02-04 | 2015-07-08 | 青海鲁丰鑫恒铝材有限公司 | A kind of casting roll flame plating energy saver |
-
2024
- 2024-01-18 CN CN202410075766.XA patent/CN117587353B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0375931A2 (en) * | 1988-12-28 | 1990-07-04 | Sulzer Metco (US) Inc. | High velocity powder thermal spray method for spraying non-meltable materials |
| CN1047816A (en) * | 1989-01-17 | 1990-12-19 | 彼根-爱玛公司 | Shrouded thermal spray gun and spraying method thereof |
| CN104233176A (en) * | 2014-09-12 | 2014-12-24 | 芜湖鼎瀚再制造技术有限公司 | Supersonic flame spraying system |
| CN204455263U (en) * | 2015-02-04 | 2015-07-08 | 青海鲁丰鑫恒铝材有限公司 | A kind of casting roll flame plating energy saver |
Non-Patent Citations (1)
| Title |
|---|
| 热喷涂工艺的现状和发展趋向;杨遇春;材料导报;19920515(05);全文 * |
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