CN107969059A - Air-cooled non transferred arc plasma torch - Google Patents
Air-cooled non transferred arc plasma torch Download PDFInfo
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- CN107969059A CN107969059A CN201711277338.1A CN201711277338A CN107969059A CN 107969059 A CN107969059 A CN 107969059A CN 201711277338 A CN201711277338 A CN 201711277338A CN 107969059 A CN107969059 A CN 107969059A
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- 238000001816 cooling Methods 0.000 claims abstract description 41
- 239000012212 insulator Substances 0.000 claims abstract description 31
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- 229910002804 graphite Inorganic materials 0.000 claims description 11
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/28—Cooling arrangements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
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Abstract
The invention discloses a kind of air-cooled non transferred arc plasma torch, air-cooled non transferred arc plasma torch includes package, air inlet pipe, insulator, anode bodies, cathode package and has a first end and a second end, and air inlet pipe is inserted into from the second end of package.At least a portion of insulator is located between the second end of package and air inlet pipe.Anode bodies block the first end in package, and anode bodies are equipped with spout, and spout is connected with air inlet pipe.Cathode is located in package, and one end that one end and the air inlet pipe of cathode stretch to package is connected, and the other end of cathode is equipped with the air flue of connection air inlet pipe towards notch setting in cathode.Air-cooled non transferred arc plasma torch according to embodiments of the present invention, cools down gun body inner body using air cooling way, simplifies gun configuration, improve the effective rate of utilization of electric energy, improve work efficiency, extend the service life of electrode body.
Description
Technical Field
The invention relates to the technical field of plasma, in particular to an air-cooled non-transferred arc plasma gun.
Background
The plasma state is the fourth state of matter, and almost 99% of the matter (excluding the dark matter that has not been confirmed) in the universe is in the plasma state. The temperature distribution range of the plasma is from 10K low temperature to 10 hundred million K ultrahigh temperature of nuclear fusion plasma, and the plasma has a series of unique properties, so that the plasma can be widely applied to the fields of nano material production, new material synthesis, hot processing manufacturing, smelting, drilling, coal chemical industry, waste treatment, material surface treatment, electronics, new energy, military, aerospace and the like. In recent decades, the development of plasma generators and the development of plasma diagnostic techniques have made great progress, and the focus of plasma development and development has not been limited to the application in aerospace, but has shifted more to the application in mechanical, chemical, metallurgical, environmental and other industrial sectors, especially in the fields of material processing and new material development. The plasma system has two types of transferred arc and non-transferred arc, the positive pole and the negative pole of the non-transferred arc plasma are both in one plasma gun, compared with the transferred arc plasma, the non-transferred arc plasma equipment has more complex structure and higher price, influences the development of the non-transferred arc plasma technology to a certain extent, and the non-transferred arc plasma system with low price and simple structure is urgently needed to promote the wide application of the plasma technology at present.
The existing non-transferred arc plasma guns are all of water cooling structures, the water cooling structures have good effects on some heating systems which run for a short time, but have poor effects on some heating systems which run for a long time, such as garbage treatment, fly ash treatment and the like, and the reason is that half of heat is taken away by cooling water, so that the utilization rate of electric energy is only about 50%, the electric energy consumption and the cost are increased, and a non-transferred arc plasma gun capable of improving the electric energy utilization rate and reducing the running cost is urgently needed at present.
The prior art discloses a handheld gas-cooled plasma torch, which adopts the technical scheme that a conductive disc is arranged at the front end of a conductive tube, a graphite electrode holder is arranged at the front end of the conductive disc, a hollow graphite electrode is arranged at the front end of the graphite electrode holder, the front end of the conductive tube is connected with one pole of a direct-current power supply, and a metal piece is connected with the other end of the direct-current power supply. The technology is a transferred arc plasma gun, the gun body is only a cathode, an outer anode is required, a non-transferred arc cannot be formed, the working conditions of cladding, cutting and the like can be carried out, and other working conditions cannot be heated.
The prior art discloses a small-sized non-cooling plasma jet igniter which mainly comprises an anode, a cathode, a cyclone, ceramics, a shell, a spring and an air supply pipeline (a cathode wiring pipe). The invention is only suitable for small-sized working conditions, the burning loss in the gun body is more severe, and the gun is not suitable for long-term work; and the device structure is comparatively complicated, is unfavorable for wearing and tearing the piece and changes, also is difficult to be used for large-scale firing equipment.
The prior art discloses a high-power air-cooling plasma generator which mainly comprises a cathode body, an anode body and a magnetic coil, wherein the cathode body is in a gyroscope shape, the anode body adopts a Laval nozzle structure, the cathode body and the anode body are coaxially arranged, the magnetic coil is arranged at the rear part of the cathode body and connected in series in a circuit loop of the cathode body, an electric arc is formed between the cathode body and the anode body, the electric arc rotates at high speed under the action of Lorentz force generated by the magnetic coil and is blown out along a channel of the anode body by rotating airflow to form a plasma flow, the cooling of the cathode body and the anode body adopts an air cooling mode, the cooling mode of the cathode body and the anode body of the high-power plasma generator is changed from water cooling to air cooling, and the problems of complex structure and poor reliability of the conventional water-cooling electrode plasma are solved. The device adopts the magnetic coil to cool the plasma arc, thereby improving the cost of the equipment to a certain extent, and the magnetic compression is energy-consuming, although the loss of cooling water to energy is reduced, the magnetic coil energy consumption also reduces the effective utilization rate of electric energy to a certain extent.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the air-cooled non-transferred arc plasma gun which is simple in structure and high in effective utilization rate of electric energy.
An air-cooled non-transferred arc plasma gun according to an embodiment of the present invention includes: a casing having a first end and a second end; an inlet tube inserted from a second end of the casing; an insulator, at least a portion of which is disposed between the second end of the casing and the inlet tube; the anode body is plugged at the first end of the shell tube, and is provided with a nozzle which is communicated with the air inlet tube; the cathode body is arranged in the shell tube, one end of the cathode body is connected with one end, extending into the shell tube, of the air inlet tube, the other end of the cathode body is arranged towards the nozzle, and an air channel communicated with the air inlet tube is arranged in the cathode body; the air inlet pipe and the cathode body are spaced from the inner wall of the shell pipe, and an air cooling channel communicated with each other is defined between the air inlet pipe and the cathode body and the inner wall of the shell pipe; the cathode body is spaced apart from the anode body to define a protection channel in communication with the air-cooled channel; the pipe wall of the air inlet pipe is provided with a cooling hole communicated with the air cooling channel; in addition, the shell tube, the air inlet tube, the anode body and the cathode body are all conductors, the shell tube is suitable for being connected with positive electrode electricity, and the air inlet tube is suitable for being connected with negative electrode electricity.
According to the air-cooled non-transferred arc plasma gun provided by the embodiment of the invention, the air-cooled mode is adopted to cool the parts inside the gun body, so that the structure of the ion gun is simplified, the effective utilization rate of electric energy is improved, the working efficiency is improved, and the service life of the electrode body is prolonged.
In some embodiments, the air-cooled non-transferred arc plasma gun further comprises: the heat insulation sleeve is sleeved between the air inlet pipe and the insulator, and one part of the heat insulation sleeve extends out of the insulator.
In some embodiments, a groove is formed on an end surface of the anode body facing the cathode body, and one end of the cathode body extends into the groove.
Specifically, the inner surface of the groove is formed into a hemispherical surface, and the end surface of the cathode body is formed into a matched hemispherical surface.
In some embodiments, the cooling holes are formed as oblique holes extending from inside to outside of the tube of the intake duct toward the nozzle.
In some embodiments, at least one of the two parts is connected with the anode body by a screw thread from the air inlet pipe to the anode body.
In some embodiments, the inlet tube and the casing tube are each heat resistant steel pieces.
In some embodiments, the cathode body and the anode body are each high purity graphite pieces.
In some embodiments, the insulator is a glass fiber reinforced plastic.
In some embodiments, the cathode body is formed in a cylindrical body, the air duct penetrates the cathode body in an axial direction of the cathode body, one end of the air duct is formed in a large hole to externally cover the air inlet pipe, and the cathode body is coaxially disposed with the casing pipe.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of the overall structure of an air-cooled non-transferred arc plasma gun according to an embodiment of the present invention.
Reference numerals:
an air-cooled non-transferred arc plasma gun 100,
The casing 1, the first end S1, the second end S2,
An air inlet pipe 2, a cooling hole 21,
An insulator 3,
An anode body 4, a nozzle 41,
A cathode body 5, an air duct 51,
A heat insulation sleeve 6, an air cooling channel 7, a protection channel 8 and a non-transfer plasma arc 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An air-cooled non-transferred arc plasma gun 100 according to an embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, an air-cooled non-transferred arc plasma gun 100 according to an embodiment of the present invention includes a shell tube 1, an intake tube 2, an insulator 3, an anode body 4, and a cathode body 5.
The casing 1 has a first end S1 and a second end S2, the inlet tube 2 is inserted from the second end S2 of the casing 1, and at least a portion of the insulator 3 is disposed between the second end S2 of the casing 1 and the inlet tube 2. The anode body 4 is blocked at the first end S1 of the shell tube 1, the nozzle 41 is arranged on the anode body 4, and the nozzle 41 is communicated with the air inlet tube 2. The cathode body 5 is arranged in the shell tube 1, one end of the cathode body 5 is connected with one end of the air inlet tube 2 extending into the shell tube 1, the other end of the cathode body 5 is arranged towards the nozzle 41, and an air passage 51 communicated with the air inlet tube 2 is arranged in the cathode body 5.
The air inlet pipe 2 and the cathode body 5 are spaced apart from the inner wall of the shell tube 1, and an air cooling channel 7 communicated with each other is defined between the air inlet pipe 2 and the cathode body 5 and the inner wall of the shell tube 1. The cathode body 5 is spaced from the anode body 4 to define a guard channel 8 in communication with the air-cooled channel 7. The pipe wall of the air inlet pipe 2 is provided with a cooling hole 21 communicated with the air cooling channel 7, in addition, the shell pipe 1, the air inlet pipe 2, the anode body 4 and the cathode body 5 are all conductors, the shell pipe 1 is suitable for being connected with positive electrode electricity, and the air inlet pipe 2 is suitable for being connected with negative electrode electricity.
It can be understood that, in the working engineering of the air-cooled non-transferred arc plasma gun 100 according to the embodiment of the present invention, the compressed air enters the gun body from the air inlet pipe 2, and a part of the compressed air enters the air-cooled channel 7 from the cooling hole 21 formed in the pipe wall of the air inlet pipe 2, so as to cool the parts inside the gun body, and the air-cooled channel 7 is communicated with the protection channel 8, so that the part of the compressed air can also play a role in protecting the anode body 4 and the cathode body 5 by the compressed plasma arc. And another portion of the air enters the air passage 51 in the cathode body 5 to generate plasma arc as plasma gas.
It can be seen from the above description that the air-cooled non-transferred arc plasma gun 100 according to the embodiment of the present invention has a very simple structure, and the compressed air entering the gun body can be used as plasma gas to generate plasma arc, so as to cool the inside of the gun body and protect the cathode body 5 and the anode body 4.
In addition, the air-cooled non-transferred arc plasma gun 100 of the embodiment of the invention uses air cooling instead of water cooling, thereby reducing the energy loss of cooling water and improving the electric energy utilization rate of the ion gun. Meanwhile, because the air has fluidity, the compressed air can be used as plasma gas to generate plasma arcs after cooling the interior of the gun body, and the utilization rate of the compressed air is improved.
According to the air-cooled non-transferred arc plasma gun 100 provided by the embodiment of the invention, the air-cooled mode is adopted to cool the internal parts of the gun body, so that the structure of the ion gun is simplified, the effective utilization rate of electric energy is improved, the working efficiency is improved, and the service life of the ion gun is prolonged.
In some embodiments, the air-cooled non-transferred arc plasma torch 100 includes a heat insulating sleeve 6, the heat insulating sleeve 6 is sleeved between the air inlet pipe 2 and the insulator 3, and a portion of the heat insulating sleeve 6 extends out of the insulator 3, so that a user can be prevented from being scalded when replacing the cathode body 5.
Of course, the heat insulating sleeve 6 may not be provided, the insulator 3 is designed to be stepped, one end with a smaller diameter is disposed to extend out of the second end S2 of the casing 1, and the insulator 3 has a heat insulating function and also can protect a user.
Of course, it is also possible to coat the peripheral wall of the second end S2 of the inlet pipe 2 protruding out of the casing 1 with a heat insulating material or to provide a layer of insulation to protect the user.
In some embodiments, the end face of the anode body 4 facing the cathode body 5 is provided with a groove into which an end of the cathode body 5 protrudes. This can increase the inter-electrode facing area of anode body 4 and cathode body 5.
Specifically, the inner surface of the groove is formed into a hemispherical surface, and the end surface of the cathode body 5 is formed into a matched hemispherical surface, so that the processing is easy, the gap width between the anode body 4 and the cathode body 5 can be ensured to be uniform, and the generation of electric arc is facilitated.
Of course, the end surface of anode body 4 facing cathode body 5 may be formed in various shapes such as a flat surface and a convex surface.
In some embodiments, the cooling holes 21 are formed as oblique holes extending from inside to outside of the tube of the inlet tube 2 towards the nozzle 41, so that the gas jet inside the inlet tube 2 is ejected towards the anode body 4. Thereby, the compressed air can be uniformly supplied to the interior of the plasma torch body.
Of course, the cooling holes 21 may also be formed as straight holes, tapered holes, or the like.
Specifically, the cooling hole 21 is plural, and more specifically, plural rows of holes are provided in the axial direction of the intake pipe 2, and each row of holes is formed with plural cooling holes 21 in the circumferential direction of the intake pipe 2.
In some embodiments, a threaded connection is used at least one point between each two connected components from the gas inlet tube 2 to the anode body 4.
Specifically, when the heat insulating sleeve 6 is not arranged between the air inlet pipe 2 and the insulator 3, at least one of the positions between the air inlet pipe 2 and the insulator 3, between the insulator 3 and the shell pipe 1, between the shell pipe 1 and the anode body 4, and between the air inlet pipe 2 and the cathode body 5 is connected by screw threads. When the heat insulation sleeve 6 is arranged between the air inlet pipe 2 and the insulator 3, at least one of the positions between the air inlet pipe 2 and the heat insulation sleeve 6, between the heat insulation sleeve 6 and the insulator 3, between the insulator 3 and the shell pipe 1, between the shell pipe 1 and the anode body 4, and between the air inlet pipe 2 and the cathode body 5 is in threaded connection. Therefore, the plasma gun is very convenient to assemble integrally, particularly, the cathode body 5 and the anode body 4 are very convenient to replace, the threaded connection processing is convenient, and the production cost of the air-cooled non-transferred arc plasma gun 100 is reduced.
Of course, the connection mode is not limited to the threaded connection, and can also be various modes such as screw connection, snap connection and the like.
In some embodiments, the inlet tube 2 and the casing 1 are each heat-resistant steel pieces. It is understood that the air inlet pipe 2 is connected with the cathode body 5, and can transmit negative current to the cathode body 5; the shell tube 1 is connected with the anode body 4, and can connect positive current into the anode body 4. Thereby, a voltage is generated between the cathode body 5 and the anode body 4, and a non-transferred plasma arc is generated after arc striking. Because a large amount of heat is released in the process of generating the non-transferred plasma arc, the air inlet pipe 2 and the shell pipe 1 are made of heat-resistant steel materials, which is beneficial to prolonging the service lives of the air inlet pipe and the shell pipe. Of course, other heat-resistant, electrically conductive materials can also be used for the inlet pipe 2 and the casing 1.
In some embodiments, the cathode body 5 and the anode body 4 are each pieces of high purity graphite. High purity graphite also releases heat to heat the reactants when it is burned out, so that the cathode body 5 and the anode body 4 do not belong to a consumable but to a fuel. Therefore, the whole air-cooled non-transferred arc plasma gun 100 has no consumption part, the utilization efficiency of electric energy is improved, and the efficiency of the electric energy can reach more than 95%.
Alternatively, the cathode body 5 and the anode body 4 are designed so that the cathode body 5 and the anode body 4 have the same life, the life of the cathode body 5 and the life of the anode body 4 are found out through working experience, and when the life of the cathode body 5 and the life of the anode body 4 are exhausted, the operation is stopped, the air-cooled non-transferred arc plasma gun 100 is taken out, and the cathode body 5 and the anode body 4 are replaced. Therefore, the time for replacing the parts of the air-cooled non-transferred arc plasma gun 100 can be reduced to the maximum extent, and the working efficiency is improved.
In some embodiments, the insulator 3 is a piece of glass fiber reinforced plastic. The insulator 3 plays a role in isolating the positive and negative current, and avoids the occurrence of faults caused by short circuit of the positive and negative current. In addition, the glass fiber reinforced plastic has higher strength and can protect the air-cooled non-transferred arc plasma gun 100. Of course, the material of the insulator 3 is not limited to glass fiber reinforced plastic, and may be other insulating materials.
In some embodiments, the cathode body 5 is formed into a cylindrical body, the air duct 51 penetrates the cathode body 5 in the axial direction of the cathode body 5, one end of the air duct 51 is formed into a large hole to be externally fitted to the air inlet pipe 2, and the cathode body 5 is coaxially disposed with the casing tube 1.
In some alternative embodiments, the arc ignition mode of the air-cooled non-transferred arc plasma gun 100 employs high frequency high voltage arc ignition or contact arc ignition.
In some alternative embodiments, the air-cooled non-transferred arc plasma gun 100 is subjected to a power in the range of 50kW to 5000 kW.
In some alternative embodiments, the air-cooled non-transferred arc plasma gun 100 ranges in size from 100mm to 1000 mm.
An air-cooled non-transferred arc plasma gun 100 in accordance with one embodiment of the present invention is described below with reference to FIG. 1.
As shown in fig. 1, the air-cooled non-transferred arc plasma torch 100 includes an inlet tube 2, a heat insulating sleeve 6, an insulator 3, a shell tube 1, a cathode body 5, and an anode body 4. The air inlet pipe 2 is in threaded connection with the heat insulation sleeve 6, the heat insulation sleeve 6 is in threaded connection with the insulator 3, the insulator 3 is in threaded connection with the shell pipe 1, the shell pipe 1 is in threaded connection with the anode body 4, and the air inlet pipe 2 is in threaded connection with the cathode body 5.
The casing 1 has a first end S1 and a second end S2 and the inlet 2 is disposed within the casing 1 with one end protruding from the second end S2 of the casing 1. A portion of the insulator 3 is provided between the second end S2 of the casing 1 and the intake pipe 2. The anode body 4 is blocked at the first end S1 of the shell tube 1, and the nozzle 41 is arranged on the anode body 4. The cathode body 5 is arranged in the shell tube 1, one end of the cathode body 5 is connected with the air inlet tube 2, the other end of the cathode body 5 is arranged towards the nozzle 41, and an air channel 51 communicated with the air inlet tube 2 is arranged in the cathode body 5. The air inlet pipe 2 and the cathode body 5 are spaced apart from the inner wall of the shell pipe 1, and an air cooling channel 7 communicated with each other is defined between the air inlet pipe 2 and the cathode body 5 and the inner wall of the shell pipe 1. The cathode body 5 is spaced from the anode body 4 to define a guard channel 8 in communication with the air-cooled channel 7. The pipe wall of the air inlet pipe 2 is provided with a cooling hole 21 communicated with the air cooling channel 7.
The air inlet pipe 2 is made of heat-resistant steel and mainly used for introducing compressed air and negative current into the cathode body 5.
The heat insulation sleeve 6 is made of heat insulation materials and mainly used for preventing a user from being scalded when the cathode body 5 is assembled and disassembled.
The insulator 3 is made of glass fiber reinforced plastic and mainly used for isolating positive and negative electrode currents.
The cooling holes 21 are inclined holes extending from the inside to the outside toward the nozzle 41, and can uniformly supply compressed air into the interior of the plasma torch body, thereby cooling the lower end of the air inlet tube 2 and the torch body, and also compressing the plasma arc protective electrode when the compressed air reaches between the cathode body 5 and the anode body 4.
The material of the casing 1 is heat resistant steel and the main function is to transmit a positive current to the anode body 4.
The cathode body 5 is made of high-purity graphite and has the function of generating a non-transferred plasma arc 9 with the anode body 4.
The anode body 4 is made of high-purity graphite and has the function of generating a non-transferred plasma arc 9 with the cathode body 5.
The structure of the cathode body 5 and the anode body 4 is designed, so that the cathode body 5 and the anode body 4 have the same service life, the service life of the cathode body 4 is found out through working experience, when the service life of the cathode body 4 is to be exhausted, the plasma gun is taken out, and the cathode body 4 is replaced.
The air-cooled non-transferred arc plasma gun 100 in the embodiment is suitable for working conditions such as plasma ignition of plasma processing garbage, fly ash and boiler, the bearing power is 50kW-5000kW by changing the structure, and the arc striking mode adopts high-frequency high-voltage arc striking or contact arc striking.
During operation, at least three plasma guns need to be prepared, so that uninterrupted operation can be conveniently carried out in the process of replacing the cathode body 5 and the anode body 4.
The air-cooled non-transferred arc plasma gun 100 of the present embodiment has the following advantages:
(1) and the structure of the plasma gun is simplified by adopting air cooling protection.
(2) The connection part of the air inlet pipe 2 and the cathode is provided with a cooling hole 21, compressed air flows into the gun body through the cooling hole 21 to cool the inside of the gun body well, and after cooling is finished, the compressed air can also be used as plasma gas to generate a non-transferred plasma arc 9.
(3) The cathode body 5 and the anode body 4 are made of high-purity graphite, and the electric energy utilization efficiency can reach more than 95%. In addition, the graphite is burnt in the air environment, so that combustion heat can be generated, and the heat can be used for generating plasma arcs.
(4) The service life of the cathode body 5 and the anode body 4 is designed to be the same, so that the replacement is convenient, and the time for replacing the electrode body of the plasma gun is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An air-cooled non-transferred arc plasma gun, comprising:
a casing having a first end and a second end;
an inlet tube inserted from a second end of the casing;
an insulator, at least a portion of which is disposed between the second end of the casing and the inlet tube;
the anode body is plugged at the first end of the shell tube, and is provided with a nozzle which is communicated with the air inlet tube;
the cathode body is arranged in the shell tube, one end of the cathode body is connected with one end, extending into the shell tube, of the air inlet tube, the other end of the cathode body is arranged towards the nozzle, and an air channel communicated with the air inlet tube is arranged in the cathode body; wherein,
the air inlet pipe and the cathode body are spaced from the inner wall of the shell pipe, and an air cooling channel communicated with each other is defined among the air inlet pipe, the cathode body and the inner wall of the shell pipe;
the cathode body is spaced apart from the anode body to define a protection channel in communication with the air-cooled channel;
the pipe wall of the air inlet pipe is provided with a cooling hole communicated with the air cooling channel; in addition, the first and second substrates are,
the shell tube, the air inlet tube, the anode body and the cathode body are all conductors, the shell tube is suitable for being connected with positive electrode electricity, and the air inlet tube is suitable for being connected with negative electrode electricity.
2. The air-cooled non-transferred arc plasma gun according to claim 1, further comprising: the heat insulation sleeve is sleeved between the air inlet pipe and the insulator, and one part of the heat insulation sleeve extends out of the insulator.
3. The air-cooled non-transferred arc plasma gun according to claim 1, wherein a groove is provided on an end surface of the anode body facing the cathode body, and one end of the cathode body extends into the groove.
4. The air-cooled non-transferred arc plasma gun according to claim 3, wherein the inner surface of the groove is formed as a hemispherical surface and the end surface of the cathode body is formed as a mating hemispherical surface.
5. The air-cooled non-transferred arc plasma gun according to claim 1, wherein the cooling hole is formed as an inclined hole extending toward the spout port from inside to outside of the tube of the gas inlet tube.
6. The air-cooled non-transferred arc plasma gun according to claim 1 or 2, wherein at least one of the two connected parts is connected by a screw thread from the air inlet pipe to the anode body.
7. The air-cooled non-transferred arc plasma gun according to claim 1, wherein the inlet tube and the shell tube are each heat resistant steel pieces.
8. The air-cooled non-transferred arc plasma gun according to claim 1, wherein the cathode body and the anode body are each pieces of high purity graphite.
9. The air-cooled non-transferred arc plasma gun according to claim 1, wherein the insulator is a piece of glass fiber reinforced plastic.
10. The air-cooled non-transferred arc plasma gun according to claim 1, wherein the cathode body is formed as a cylinder, the air passage penetrates the cathode body in an axial direction of the cathode body, one end of the air passage is formed as a large hole to externally fit the air inlet pipe, and the cathode body is coaxially disposed with the shell tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711277338.1A CN107969059A (en) | 2017-12-06 | 2017-12-06 | Air-cooled non transferred arc plasma torch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711277338.1A CN107969059A (en) | 2017-12-06 | 2017-12-06 | Air-cooled non transferred arc plasma torch |
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| CN107969059A true CN107969059A (en) | 2018-04-27 |
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| CN201711277338.1A Pending CN107969059A (en) | 2017-12-06 | 2017-12-06 | Air-cooled non transferred arc plasma torch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117500137A (en) * | 2023-12-29 | 2024-02-02 | 西安赛隆增材技术股份有限公司 | Plasma gun, power density adjusting method thereof and plasma atomization powder making equipment |
-
2017
- 2017-12-06 CN CN201711277338.1A patent/CN107969059A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117500137A (en) * | 2023-12-29 | 2024-02-02 | 西安赛隆增材技术股份有限公司 | Plasma gun, power density adjusting method thereof and plasma atomization powder making equipment |
| CN117500137B (en) * | 2023-12-29 | 2024-04-02 | 西安赛隆增材技术股份有限公司 | Plasma gun, power density adjusting method thereof and plasma atomization powder making equipment |
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