CN218710784U - Three-positive-electrode plasma spraying system - Google Patents
Three-positive-electrode plasma spraying system Download PDFInfo
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- CN218710784U CN218710784U CN202222834379.9U CN202222834379U CN218710784U CN 218710784 U CN218710784 U CN 218710784U CN 202222834379 U CN202222834379 U CN 202222834379U CN 218710784 U CN218710784 U CN 218710784U
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- 238000007750 plasma spraying Methods 0.000 title claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 115
- 239000007921 spray Substances 0.000 claims abstract description 69
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 238000005507 spraying Methods 0.000 claims abstract description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 45
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- FAYUQEZUGGXARF-UHFFFAOYSA-N lanthanum tungsten Chemical group [La].[W] FAYUQEZUGGXARF-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
The utility model relates to the field of plasma spraying, and discloses a three-positive-level plasma spraying system, which comprises a three-positive-level spray gun, a powder feeding module and a control module; the three-positive spray gun is provided with a gas injection channel for conveying mixed gas, and is also provided with a cathode and three anodes; the three anodes are uniformly and annularly distributed on the outer side of the gas injection channel and are matched with the cathode to heat the mixed gas so as to form plasma gas flow and inject the plasma gas flow out of the gas injection channel; the output end of the powder feeding module is arranged at the air outlet end of the air injection channel and used for providing powder coating for the three-positive spray gun; the control module is electrically connected with the three-positive spray gun and is used for controlling the three-positive spray gun to spray plasma airflow so as to spray powder coating at the air outlet end of the air spraying channel. The utility model provides a plasma jet flame homogeneity that three positive pole plasma spraying system can solve current plasma spraying system and produce is not good, leads to the inhomogeneous problem of powder particle material heating that erupts.
Description
Technical Field
The utility model relates to a plasma spraying field, concretely relates to three positive grade plasma spraying systems.
Background
The plasma spraying technique is a method in which a high-frequency ignition voltage is applied between a cathode and an anode of a plasma spray gun to ignite by discharge, a mixed gas such as argon, hydrogen, or helium is ionized into a high-temperature plasma gas jet at a temperature of about 15000 to 20000K, and a powder particle material such as ceramics, alloys, or metals can be heated to a molten or semi-molten state and sprayed at a high speed onto the surface of a processed workpiece to form a surface layer having a strong adhesion.
The existing plasma spraying system usually uses a single-anode plasma spray gun to spray powder particle materials onto the surface of a workpiece, however, the uniformity of plasma jet flames generated by a single cathode and an anode is not good, so that the sprayed powder particle materials are heated unevenly, and further the spraying quality of the plasma spraying system is poor.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a three positive plasma spraying system, the plasma jet flame homogeneity that can solve current plasma spraying system and produce is not good, leads to the inhomogeneous problem of powder particle material heating that erupts.
(II) technical scheme
In order to solve the technical problem, the utility model provides a following technical scheme: a three-positive-electrode plasma spraying system comprises a three-positive-electrode spray gun, a powder feeding module and a control module;
the three-positive spray gun is provided with a gas injection channel for conveying mixed gas, and is also provided with a cathode and three anodes; the three anodes are uniformly and annularly distributed on the outer side of the gas injection channel and are matched with the cathode to heat the mixed gas so as to form plasma gas flow and inject the plasma gas flow out of the gas injection channel;
the output end of the powder feeding module is arranged at the air outlet end of the air injection channel and used for providing powder coating for the three-positive spray gun;
the control module is electrically connected with the three-positive spray gun and is used for controlling the three-positive spray gun to spray plasma airflow so as to spray powder coating at the air outlet end of the air spraying channel.
The powder feeding module comprises at least two powder feeders and powder feeding pipes; the output end of each powder feeder is respectively connected with the input end of each powder feeding pipe in a one-to-one correspondence manner; the powder feeding pipe is arranged on the three-positive spray gun, and the powder outlet end of the powder feeding pipe faces the air outlet end of the air injection channel and is used for outputting powder coating towards the air outlet end of the air injection channel.
So set up, the powder feeder passes through the powder feeding pipe and carries powder coating to the end of giving vent to anger of jet channel to when plasma air current was spout from jet channel, can heat the melting and be located the powder coating of the end of giving vent to anger of jet channel, and spray the powder coating after will melting to the work piece surface.
Further, the powder feeding pipes are uniformly and annularly distributed in the same plane, and the powder discharging direction of the powder feeding pipes is vertical to the axial direction of the air injection channel.
By the arrangement, uniform powder feeding can be ensured, so that the three-positive-level spray gun can uniformly and fully heat the powder coating.
The three-positive-stage plasma spraying system further comprises a power supply; the power supply is electrically connected with the control module and used for supplying power to the control module; the input end and the output end of the control module are electrically connected with the three-positive-level spray gun and used for providing high-frequency ignition voltage for the three-positive-level spray gun.
So set up, the control module improves the voltage of power and forms high frequency voltage to provide three positive grades of spray guns, in order to exert between the negative pole and the positive pole of spray gun, punctures the argon gas or the nitrogen gas between negative pole, the positive pole, make it discharge and ignite, the power can in time provide the holding current in the ignition process, prepare for follow-up spraying technology demand.
And a lanthanum-tungsten part is arranged at one end of the anode close to the air injection channel.
So set up, the durable electric current of lanthanum tungsten portion is high, and the rate of burning out is little, consequently, the positive pole passes through lanthanum tungsten portion and negative pole cooperation heating mist, can effectively improve the performance of positive pole, prolongs the life of positive pole.
The three-anode spray gun is further provided with a cathode terminal electrically connected with the cathode and three anode terminals correspondingly and electrically connected with the anodes; the three-positive-grade plasma spraying system also comprises an adapter box; the adapter box is respectively and electrically connected with the three anode terminals and the cathode terminal, and the adapter box is also respectively and electrically connected with the input end and the output end of the control module.
So set up, control module's input and output all are connected with three positive spray guns electricity through the keysets to control three positive spray guns ignition operation, heat and spray powder coating.
(III) advantageous effects
Compared with the prior art, the utility model provides a pair of three positive plasma spraying system possesses following beneficial effect:
1. when the three-positive-grade plasma spraying system is used, the powder feeding module conveys the powder coating to the air outlet end of the air injection channel; the control module controls the three-anode spray gun to perform ignition operation, when the three-anode spray gun performs ignition operation, the three anodes and the cathode are matched to heat mixed gas in the gas injection channel so as to form high-temperature and high-speed plasma jet flow and spray the plasma jet flow out of the gas injection channel, the plasma jet flow simultaneously melts powder coating at the gas outlet end of the gas injection channel, and the melted powder coating is sprayed onto the surface of a workpiece;
thus, the three-anode plasma spraying system provided by the utility model heats the mixed gas to form high-temperature and high-speed plasma jet by the cooperation of the three anodes and the cathodes, which can improve the heating efficiency and the energy density of the plasma jet, thereby leading the melting effect of the powder to be better;
2. the three anodes are uniformly and annularly distributed at the outer side of the gas injection channel and can uniformly heat the mixed gas, so that the flame uniformity of the plasma jet is improved, the plasma jet can uniformly and fully melt the powder coating, and the problem that the uniformity of the plasma jet flame generated by the conventional plasma spraying system is poor, so that the sprayed powder particle material is not uniformly heated is solved;
3. the powder coating is sprayed after being evenly and fully melted, so that the spraying is finer, the spraying pores are effectively reduced, and the spraying quality is improved.
Drawings
FIG. 1 is a schematic connection diagram of a three-positive plasma spraying system according to the present invention;
fig. 2 is a structural sectional view of a three-positive-grade spray gun.
Reference numerals: 1. a three positive spray gun; 11. an air injection passage; 12. an air inlet pipe; 13. a gas pipe joint; 14. a cathode; 15. an anode; 151. a lanthanated tungsten portion; 16. a cathode terminal; 17. an anode terminal; 2. a powder feeding module; 21. a powder feeder; 22. a powder feeding pipe; 3. a control module; 4. a transfer box; 5. a power source.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, a three-positive plasma spraying system can solve the problem that the uniformity of plasma jet flame generated by the existing plasma spraying system is not good, which causes the uneven heating of the sprayed powder particle material.
The three-positive-pole plasma spraying system comprises a three-positive-pole spray gun 1, a powder feeding module 2 and a control module 3.
The three-positive spray gun 1 is internally provided with a gas injection channel 11 and a gas inlet pipe 12, wherein the gas injection channel 11 is used for conveying mixed gas (argon, hydrogen or helium and the like), the gas inlet pipe 12 is used for communicating the gas injection channel 11 with a mixed gas source, and a gas pipe joint 13 used for connecting the mixed gas source is further screwed on the gas inlet end of the gas inlet pipe 12.
The three-positive spray gun 1 is internally provided with a cathode 14 and three anodes 15; the three anodes 15 are uniformly and annularly distributed on the outer side of the gas injection channel 11, and cooperate with the cathode 14 to heat the mixed gas to form uniform plasma gas flow and eject the plasma gas flow out of the gas injection channel 11. So, three positive pole 15 can improve heating efficiency and improve plasma jet's energy density, the utility model provides a three positive pole plasma spraying system maximum power is 120KW, and ordinary single positive pole plasma's maximum power is 65KW, and the energy density of plasma flame core is more than 5 times ordinary single positive pole plasma, and high energy density can improve the melting effect of powder, and then makes the material density that spouts on the work piece also than single positive pole plasma many that are high, the product quality is higher during PVD, economic efficiency also obviously promotes.
One end of the anode 15 close to the gas injection channel 11 is welded with a lanthanum-tungsten part 151, and lanthanum-tungsten alloy is used as the material of the lanthanum-tungsten part 151.
The three-anode spray gun 1 is also screwed with a cathode terminal 16 electrically connected with the cathode 14 and three anode terminals 17 electrically connected with the anodes 15 correspondingly.
The powder feeding module 2 comprises three powder feeders 21 and three powder feeding pipes 22; the output end of each powder feeder 21 is correspondingly connected with the input end of each powder feeding pipe 22 one by one; the powder feeding pipe 22 is screwed on the three-positive spray gun 1, and the powder outlet end of the powder feeding pipe is distributed towards the air outlet end of the air injection channel 11, and is used for outputting the powder coating towards the air outlet end of the air injection channel 11. In this way, the three-anode plasma spraying system supplies powder coating to the three-anode spray gun 1 by matching the three powder feeders 21 and the powder feeding pipe 22 to feed powder together, so that the powder feeding amount of the three-anode plasma spraying system in unit time is three times that of single-anode plasma, the powder feeding rate is about four times that of the single-anode plasma, and the problems of small powder feeding amount and low powder feeding rate of the conventional plasma spraying system can be solved.
The three powder feeding pipes 22 are uniformly and annularly distributed in the same plane, the included angle between two adjacent powder feeding pipes 22 is 120 degrees, and the powder discharging directions of the three powder feeding pipes 22 are all perpendicular to the axial direction of the air injection channel 11.
The three-positive-grade plasma spraying system also comprises an adapter box 4; the adapter box 4 is electrically connected with three anode terminals 17 and a cathode terminal 16 of the three-anode spray gun 1 through cables respectively, and the adapter box 4 is also electrically connected with the input end and the output end of the control module 3 respectively, so that the three-anode spray gun 1 and the control module 3 are electrically connected through the adapter box 4, and the control module 3 is used for controlling the three-anode spray gun 1 to spray plasma airflow so as to spray and melt powder coating at the air outlet end of the air injection channel 11.
The adapter box 4 uses the existing adapter box 4, and at least four cable interfaces for electrically connecting with the anode 15 or the cathode 14 of the three-anode spray gun 1 are arranged on the adapter box 4; the control module 3 uses an existing control cabinet.
The three-positive-electrode plasma spraying system also comprises a power supply 5; the power supply 5 is electrically connected with the control module 3 and used for supplying power to the control module 3; the input end and the output end of the control module 3 are electrically connected with the adapter box 4, so that the control module 3 is electrically connected with the three-anode spray gun 1 through the adapter box 4, and the control module 3 is used for providing high-frequency ignition voltage (DC 8000-10000V and 80-200 KHZ) for the three-anode spray gun 1 so as to control the three-anode spray gun 1 to carry out ignition operation and also used for providing required electric energy for the three-anode spray gun 1.
In the following detailed description, as shown in fig. 1-2, the present invention is exemplified by a three-positive plasma spraying system, which mainly comprises: three positive spray guns 1, send whitewashed module 2, control module 3, adaptor box 4 and power 5.
During actual assembly and use: (1) Firstly, three powder feeding pipes 22 are screwed on a three-positive spray gun 1; then, the output ends of the three powder feeders 21 are respectively in one-to-one corresponding screw connection with the input ends of the three powder feeding pipes 22 through pipelines, so that the powder outlet ends of the powder feeding pipes 22 face the gas outlet end of the gas injection channel 11;
(2) Then, three anode terminals 17 and a cathode terminal 16 of the three-anode spray gun 1 are connected to a cable interface of the adapter box 4 through cables, and then the input end and the output end of the control module 3 are also connected to the adapter box 4;
(3) Finally, the power supply 5 is electrically connected to the control module 3 through the power supply 5.
The working principle in actual use is as follows:
when the three-anode plasma spraying system provided by the utility model is used, firstly, the three-anode spray gun 1 is started through the control module 3 to carry out ignition operation, and when the three-anode spray gun 1 is ignited, the three anodes 15 and the cathode 14 are matched with each other to heat the mixed gas in the gas injection channel 11 so as to form plasma gas flow and spray the gas injection channel 11; and then starting the three powder feeders 21, wherein the three powder feeders 21 respectively output the powder coating towards the air outlet end of the air injection channel 11 through the three powder feeding pipes 22, so that the powder coating at the air outlet end of the air injection channel 11 is melted while the plasma air flow is sprayed out, and the melted powder coating is sprayed onto the surface of the workpiece to form a coating.
The three-positive-electrode plasma spraying system provided by the utility model heats the mixed gas to form high-temperature and high-speed plasma jet by the cooperation of the three anodes 15 and the cathode 14, so that the heating efficiency can be improved, and the energy density of the plasma jet can be improved, thereby the melting effect of the powder is better; the three anodes 15 are uniformly and annularly distributed on the outer side of the gas injection channel 11 and can uniformly heat the mixed gas, so that the plasma jet flame uniformity is improved, the plasma jet can uniformly and fully melt the powder coating, the problem that the uniformity of plasma jet flame generated by the conventional plasma spraying system is poor, so that the sprayed powder particle material is not uniformly heated is solved, and the powder coating is uniformly and fully melted and then sprayed, so that the spraying is finer, the spraying pores are effectively reduced, the spraying quality is improved, and thus, the sprayed target product cannot generate point discharge during PDV coating;
the three-positive-level plasma spraying system can feed powder through the three powder feeders 21 and the three powder feeding pipes 22, so that the powder feeding speed and the powder feeding amount can be greatly improved; the three powder feeding pipes 22 are uniformly and annularly distributed, so that powder can be uniformly fed, and the three-positive-level spray gun 1 can uniformly and fully heat the powder coating;
taking 100 KG of silicon target as an example, the powder feeding amount of the single anode plasma is more than 75 g/min, the powder feeding rate is about 35%, the required powder is about 286KG, which takes about 380 minutes, while the powder required by the three anode plasma is only 215KG, which takes about 95 minutes.
To sum up, the utility model provides a three positive ions plasma spraying system carries out three positive spraying operations through three positive spray gun 1, send powder module 2 and the cooperation of control module 3, can make this three positive ions plasma spraying system have high energy density, high powder volume, high powder rate and low advantages such as porosity of sending, and improved spraying quality and spraying efficiency greatly.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A three-positive-electrode plasma spraying system is characterized by comprising a three-positive-electrode spray gun, a powder feeding module and a control module;
the three-positive spray gun is provided with a gas injection channel for conveying mixed gas, and is also provided with a cathode and three anodes; the three anodes are uniformly and annularly distributed on the outer side of the gas injection channel and are matched with the cathode to heat the mixed gas so as to form plasma gas flow and inject the plasma gas flow out of the gas injection channel;
the output end of the powder feeding module is arranged at the air outlet end of the air injection channel and used for providing powder coating for the three-positive spray gun;
the control module is electrically connected with the three-positive spray gun and used for controlling the three-positive spray gun to spray plasma airflow so as to spray powder coating at the air outlet end of the air spraying channel.
2. The three-anode plasma spraying system of claim 1, wherein the powder feed module comprises at least two powder feeders and a powder feed tube; the output end of each powder feeder is respectively connected with the input end of each powder feeding pipe in a one-to-one correspondence manner; the powder feeding pipe is arranged on the three-positive spray gun, and the powder outlet end of the powder feeding pipe faces the air outlet end of the air injection channel and is used for outputting powder coating towards the air outlet end of the air injection channel.
3. The system of claim 2, wherein the powder delivery pipes are uniformly and annularly distributed in the same plane, and the powder discharge direction of the powder delivery pipes is perpendicular to the axial direction of the gas injection channel.
4. The three-anode plasma spray system of claim 1, further comprising a power source; the power supply is electrically connected with the control module and used for supplying power to the control module; and the input end and the output end of the control module are electrically connected with the three-anode spray gun and are used for providing high-frequency ignition voltage for the three-anode spray gun.
5. The three-anode plasma spraying system of claim 4, wherein the anode has a lanthanated tungsten portion at an end adjacent to the gas injection passage.
6. The three-anode plasma spraying system according to claim 4, wherein the three-anode spray gun is further provided with a cathode terminal electrically connected with the cathode and three anode terminals electrically connected with the anodes; the three-positive-stage plasma spraying system further comprises an adapter box; the adapter box is respectively and electrically connected with the three anode terminals and the cathode terminal, and the adapter box is also respectively and electrically connected with the input end and the output end of the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222834379.9U CN218710784U (en) | 2022-10-26 | 2022-10-26 | Three-positive-electrode plasma spraying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222834379.9U CN218710784U (en) | 2022-10-26 | 2022-10-26 | Three-positive-electrode plasma spraying system |
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| Publication Number | Publication Date |
|---|---|
| CN218710784U true CN218710784U (en) | 2023-03-24 |
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|---|---|---|---|
| CN202222834379.9U Active CN218710784U (en) | 2022-10-26 | 2022-10-26 | Three-positive-electrode plasma spraying system |
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- 2022-10-26 CN CN202222834379.9U patent/CN218710784U/en active Active
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