Normal-pressure plasma spray gun

Abstract

The utility model provides a normal-pressure plasma spray gun which specifically comprises a spray head, a front gun barrel, a middle gun barrel, a rear gun barrel and a cable module, and a ceramic cyclone insulating part and an electrode tip are arranged in the middle gun barrel; the spray head is detachably connected with the front gun barrel, the other end of the front gun barrel is detachably connected with the middle gun barrel, and the other end of the middle gun barrel is detachably connected with the rear gun barrel; the cable module is arranged in the rear gun barrel and detachably connected with the end, away from the spray head, of the rear gun barrel. An air inlet is formed in the end, close to the spray head, of the rear gun barrel, a plurality of integrally-formed cyclone channels are formed in the ceramic cyclone insulating part, and the cyclone channels communicate with the air inlet; each cyclonic channel is inclined from an inner reference surface of the ceramic cyclonic insulator at a predetermined angle and a predetermined direction. The ceramic cyclone insulator in the middle gun barrel is provided with the plurality of integrally formed cyclone channels, and the cyclone channels incline from the inner reference surface at the preset angle and in the preset direction, so that gas is more uniform in the ionization process. And the electrode tip can be quickly replaced in a detachable connection mode.

Description

Technical Field

[0001] This application relates to the field of atmospheric pressure plasma spray gun technology, and in particular to an atmospheric pressure plasma spray gun. Background Technology

[0002] Atmospheric pressure plasma equipment plays a vital role in many fields such as material surface treatment and coating preparation. It mainly consists of two parts: a high-voltage generator (plasma power supply) and a plasma generator (plasma spray gun). In practical applications, the effective range of the plasma area is relatively limited, generally only between 10-20 mm. To meet the needs of different working environments, the plasma power supply and the plasma spray gun need to be connected via high-voltage lines, ground wires, spray gun motor drive lines, and air hoses. The length of these connecting cables is typically between 2-5 meters, with the specific length adjusted according to the actual usage environment.

[0003] Currently, when assembling atmospheric pressure plasma direct injection guns, the high-voltage wire and ground wire are directly connected to the injection gun, and then the other end of these wires is connected to the power supply. This connection method has revealed many problems in practical applications.

[0004] Furthermore, the existing gas entry method of atmospheric pressure plasma direct injection guns has significant shortcomings. After entering the gun body, the gas flows directly to the plasma electrode head, where it is ionized under high voltage to form plasma that is ejected. This gas entry method makes it difficult for the gas to be evenly distributed during ionization. Moreover, the existing spray gun structure design is not reasonable enough, and the operation is cumbersome when changing the electrode head. Utility Model Content

[0005] In view of the aforementioned problems, this application is made to provide an atmospheric pressure plasma spray gun that overcomes or at least partially solves the problems, comprising a nozzle, a front barrel, a middle barrel, a rear barrel, and a cable module. The middle barrel houses a ceramic cyclone insulator and an electrode head. The nozzle is detachably connected to the front barrel, the other end of the front barrel is detachably connected to the middle barrel, and the other end of the middle barrel is detachably connected to the rear barrel. The cable module is disposed within the rear barrel and detachably connected to the end of the rear barrel away from the nozzle. An air inlet is provided at the end of the rear barrel near the nozzle. The ceramic cyclone insulator contains a plurality of integrally formed cyclone channels communicating with the air inlet. Each cyclone channel is inclined from the inner reference plane of the ceramic cyclone insulator at a predetermined angle and direction. The electrode head is detachably connected to the end of the ceramic cyclone insulator near the nozzle and housed within the front barrel.

[0006] Optionally, a plurality of the cyclone channels are evenly distributed within the ceramic cyclone insulator, and the inclination direction of each cyclone channel is the same.

[0007] Optionally, the nozzle is connected to a nozzle, and the nozzle has multiple airflow channels, the inclination angle of which is the same as the inclination angle of the cyclone channel in the ceramic cyclone insulator.

[0008] Optionally, the connection between the cable module and the end of the rear gun barrel furthest from the nozzle is either a plug-in connection or a bolt connection, and the cable module is connected to the electrical components inside the atmospheric pressure plasma spray gun.

[0009] Optionally, the cable module includes a high-voltage line, a ground wire, and a gas pipe;

[0010] Both the high-voltage line and the ground wire are wrapped with an insulating shielding layer. The innermost layer of the insulating shielding layer is a high-temperature resistant insulating layer, the middle layer is a metal shielding mesh, and the outermost layer is a wear-resistant protective layer.

[0011] Optionally, the nozzle, the front barrel, the middle barrel, and the rear barrel are all made of high-temperature resistant and corrosion-resistant metal materials.

[0012] Optionally, the inner wall of the cyclone channel of the ceramic cyclone insulator is provided with a nanoscale insulating coating.

[0013] Optionally, the ceramic cyclone insulator has a sealing groove at one end near the nozzle, and a sealing ring is installed in the sealing groove.

[0014] Optionally, the outer surface of the ceramic cyclone insulator is provided with anti-slip texture.

[0015] Optionally, the inner diameters of the front barrel, the middle barrel, and the rear barrel are set in a preset proportional relationship.

[0016] This application has the following advantages:

[0017] In the embodiments of this application, the problems exposed in the actual use of the high-voltage and ground wire connection methods during the assembly of existing atmospheric pressure plasma spray guns are addressed. These problems include insufficient gas entry methods, unreasonable spray gun structure design, and cumbersome operation when replacing the electrode head. This application provides an atmospheric pressure plasma spray gun, specifically including a nozzle, a front barrel, a middle barrel, a rear barrel, and a cable module. The middle barrel houses a ceramic cyclone insulator and an electrode head. The nozzle is detachably connected to the front barrel, the other end of the front barrel is detachably connected to the middle barrel, and the other end of the middle barrel is detachably connected to the rear barrel. The cable module is located inside the rear barrel and is detachably connected to the end of the rear barrel away from the nozzle. An air inlet is provided at the end of the rear barrel near the nozzle. The ceramic cyclone insulator contains multiple integrally formed cyclone channels, which communicate with the air inlet. Each cyclone channel is inclined from the inner reference plane of the ceramic cyclone insulator at a preset angle and direction. This application features an air inlet in the rear barrel and multiple integrally formed cyclone channels within the middle barrel's ceramic cyclone insulator, connected to the air inlet. These cyclone channels are inclined at a preset angle and direction from the inner reference plane, ensuring more uniform gas distribution during ionization. The nozzle, front barrel, middle barrel, and rear barrel are detachably connected, and the cable module is also detachably connected to the rear barrel, simplifying electrode replacement. The detachable connection of the cable module to the rear barrel optimizes the connection method. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This application provides a schematic diagram of the overall structure of an atmospheric pressure plasma spray gun.

[0020] Figure 2 A schematic diagram of the structure of a ceramic cyclone insulator for an atmospheric pressure plasma spray gun provided in this application is shown.

[0021] The reference numerals in the accompanying drawings are as follows:

[0022] 1. Nozzle; 2. Front barrel; 3. Middle barrel; 4. Rear barrel; 5. Cable module; 6. Ceramic cyclone insulation component; 7. Electrode head; 8. Air inlet; 9. Cyclone channel. Detailed Implementation

[0023] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] The inventors, through analysis of existing technologies, discovered that during the assembly of atmospheric pressure plasma direct injection guns, the complex wiring easily leads to electromagnetic interference between the lines during operation. This interference affects the stability of the plasma gun's performance, making it difficult to maintain consistent processing results and failing to meet the production demands for high product quality. Furthermore, the complex wiring significantly increases the difficulty and cost of equipment installation and maintenance. Once a malfunction occurs, troubleshooting and repair require considerable time, resulting in reduced production efficiency and economic losses for the company. Additionally, after the gas enters the gun body, it flows directly to the plasma electrode head, where it is ionized under high voltage to form plasma. This gas intake method makes it difficult to distribute the gas evenly during ionization, resulting in poor plasma stability.

[0025] Please refer to Figure 1-2 The diagram shows a structural schematic of an atmospheric pressure plasma spray gun provided in this application.

[0026] A normal pressure plasma spray gun includes a nozzle 1, a front barrel 2, a middle barrel 3, a rear barrel 4, and a cable module 5. The middle barrel 3 contains a ceramic cyclone insulator 6 and an electrode head 7. The nozzle 1 is detachably connected to the front barrel 2, and the other end of the front barrel 2 is detachably connected to the middle barrel 3. The other end of the middle barrel 3 is detachably connected to the rear barrel 4. The cable module 5 is located inside the rear barrel 4 and is detachably connected to the end of the rear barrel 4 away from the nozzle 1. The rear barrel 4 has an air inlet 8 near the nozzle 1. The ceramic cyclone insulator 6 contains a plurality of integrally formed cyclone channels 9, which communicate with the air inlet 8. Each cyclone channel 9 is inclined from the inner reference surface of the ceramic cyclone insulator 6 at a preset angle and a preset direction. The electrode head 7 is detachably connected to the end of the ceramic cyclone insulator 6 near the nozzle 1 and is housed in the front barrel 2.

[0027] It should be noted that the nozzle 1 is detachably connected to the front barrel 2, the front barrel 2 to the middle barrel 3, and the middle barrel 3 to the rear barrel 4. This design greatly facilitates the assembly, maintenance, and component replacement of the spray gun. For example, when it is necessary to replace the electrode head 7, because each barrel is detachable, the relevant components can be easily disassembled to access the location of the electrode head 7 for replacement, solving the problem of cumbersome operation when replacing the electrode head 7 in traditional spray guns.

[0028] It should be noted that the cable module 5 is housed inside the rear barrel 4 and is detachably connected to the end of the rear barrel 4 furthest from the nozzle 1. This design optimizes the traditional high-voltage and ground wire connection methods of spray guns in practical applications. The detachable connection method makes the installation, debugging, and maintenance of the wiring more convenient, while also improving the stability and reliability of the overall electrical connection of the spray gun.

[0029] It should be noted that the electrode head 7 is detachably connected to the ceramic cyclone insulator 6 near the nozzle 1 and is housed within the front barrel 2. This detachable connection facilitates the replacement of the electrode head 7. When the electrode head 7 becomes worn or damaged, a new electrode head 7 can be easily removed and installed, ensuring the spray gun continues to operate normally. Housed within the front barrel 2, it works in conjunction with other components to ionize the gas passing through the cyclone channel 9 of the ceramic cyclone insulator 6 under high pressure, generating plasma that is ejected from the nozzle 1.

[0030] In the embodiments of this application, the problems exposed in the actual use of the high-voltage line and ground line connection method of the atmospheric pressure plasma spray gun during assembly in the prior art, the obvious deficiencies in the gas entry method, the unreasonable design of the spray gun structure, and the cumbersome operation when replacing the electrode head 7 are addressed. This application provides an atmospheric pressure plasma spray gun, specifically including a nozzle 1, a front barrel 2, a middle barrel 3, a rear barrel 4, and a cable module 5. The middle barrel 3 is provided with a ceramic cyclone insulator 6 and an electrode head 7. The nozzle 1 is detachably connected to the front barrel 2, the other end of the front barrel 2 is detachably connected to the middle barrel 3, and the other end of the middle barrel 3 is detachably connected to the rear barrel 4. The cable module 5 is disposed in the rear barrel 4 and is detachably connected to the end of the rear barrel 4 away from the nozzle 1. The rear barrel 4 is provided with an air inlet 8 at the end near the nozzle 1. The ceramic cyclone insulator 6 is provided with a plurality of integrally formed cyclone channels 9, and the cyclone channels 9 communicate with the air inlet 8. Each cyclone channel 9 is inclined from the inner reference plane of the ceramic cyclone insulator 6 at a preset angle and a preset direction. This application features an air inlet 8 in the rear barrel 4 and multiple integrally formed cyclone channels 9 within the ceramic cyclone insulator 6 of the middle barrel 3, which communicate with the air inlet 8. The cyclone channels 9 are inclined from the inner reference plane at a preset angle and direction, ensuring more uniform gas distribution during ionization. The nozzle 1, front barrel 2, middle barrel 3, and rear barrel 4 are detachably connected, and the cable module 5 is also detachably connected to the rear barrel 4, simplifying the replacement of the electrode head 7. The detachable connection between the cable module 5 and the rear barrel 4 optimizes the connection method.

[0031] The following will further describe an atmospheric pressure plasma spray gun in this exemplary embodiment. Please refer to [link / reference needed] for details. Figures 1-2 .

[0032] In one embodiment, a plurality of cyclone channels 9 are evenly distributed within the ceramic cyclone insulator 6, and the inclination direction of each cyclone channel 9 is the same. The inner wall of the cyclone channel 9 of the ceramic cyclone insulator 6 is provided with a nano-level insulating coating. A sealing groove is provided at one end of the ceramic cyclone insulator 6 near the nozzle 1, and a sealing ring is installed in the sealing groove. The outer surface of the ceramic cyclone insulator 6 is provided with anti-slip textures. The inner diameters of the front barrel 2, the middle barrel 3, and the rear barrel 4 are set according to a preset proportional relationship.

[0033] It should be noted that multiple cyclone channels 9 are evenly distributed within the ceramic cyclone insulator 6, and their inclination directions are the same. This layout allows the gas to flow along a relatively consistent path and cyclone pattern after entering the cyclone channels 9. In implementation, the ceramic cyclone insulator 6 can be manufactured using precision molds, and each cyclone channel 9 can be precisely sculpted using CNC machining technology, ensuring that the spacing between the channels is uniform and that the inclination angle is strictly processed according to preset values. For example, the channel positions and angles can be determined through 3D modeling, and then laser etching or precision injection molding processes can be used to achieve this.

[0034] It should be noted that the inner diameters of the front barrel 2, middle barrel 3, and rear barrel 4 are set according to a preset proportional relationship. This proportional relationship needs to be determined comprehensively based on factors such as the gas flow rate, pressure requirements, and plasma generation efficiency of the spray gun. For example, if the spray gun is mainly used to handle low-flow, high-pressure gas, the inner diameter of the rear barrel 4 may be relatively small to ensure that the gas has sufficient pressure to enter the cyclone channel 9; the inner diameter of the middle barrel 3 may be moderate to stabilize the gas flow; and the inner diameter of the front barrel 2 may be slightly larger to accommodate the expansion and ejection of the plasma after formation. In implementation, the gas flow under different inner diameter ratios can be simulated and analyzed using fluid dynamics simulation software, such as ANSYS Fluent, to determine the optimal proportional relationship. Then, precision tube processing equipment, such as CNC lathes and drawing machines, can be used to process each barrel according to the design dimensions.

[0035] In one embodiment, the nozzle 1 is connected to a nozzle, and the nozzle has multiple airflow channels. The inclination angle of the airflow channels is the same as the inclination angle of the cyclone channel 9 in the ceramic cyclone insulator 6. The nozzle 1, the front barrel 2, the middle barrel 3, and the rear barrel 4 are all made of high-temperature resistant and corrosion-resistant metal materials.

[0036] It should be noted that the nozzle connected to the nozzle head 1 has multiple airflow channels, and the inclination angle of the airflow channels is the same as the inclination angle of the cyclone channel 9 in the ceramic cyclone insulator 6. This design ensures that the ionized gas from the ceramic cyclone insulator 6 can be smoothly ejected through the nozzle at a suitable angle and cyclone state. This allows the plasma to maintain good directionality and stability during ejection, which is beneficial to improving the accuracy and effectiveness of the spray gun in processing target objects.

[0037] In one embodiment, the detachable connection between the cable module 5 and the rear gun barrel 4 at the end furthest from the nozzle 1 is either a plug-in connection or a bolted connection. The cable module 5 is electrically connected to the electrical components inside the atmospheric pressure plasma spray gun. The cable module 5 includes a high-voltage wire, a ground wire, and an air pipe. Both the high-voltage wire and the ground wire are wrapped with multiple layers of insulating shielding, with the innermost layer being a high-temperature resistant insulating layer, the middle layer being a metal shielding mesh, and the outermost layer being a wear-resistant protective layer.

[0038] In one specific embodiment, a socket-type interface can be provided at the end of the rear barrel 4 away from the nozzle 1. This interface has metal contacts inside that match the plug of the cable module 5 for electrical conduction. The plug is integrated into the cable module 5. The metal pins of the plug must be made of a highly conductive and corrosion-resistant metal material, such as copper alloy, and be gold-plated to reduce contact resistance and prevent oxidation corrosion.

[0039] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0040] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0041] The above provides a detailed description of an atmospheric pressure plasma spray gun provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An atmospheric pressure plasma spray gun, comprising a nozzle, a front barrel, a middle barrel, a rear barrel, and a cable module, characterized in that, The gun barrel is equipped with a ceramic cyclone insulator and an electrode head; The nozzle is detachably connected to the front barrel, the other end of the front barrel is detachably connected to the middle barrel, and the other end of the middle barrel is detachably connected to the rear barrel. The cable module is located inside the rear barrel and is detachably connected to the end of the rear barrel away from the nozzle. The rear barrel is provided with an air inlet at one end near the nozzle, and the ceramic cyclone insulator is provided with multiple integrally formed cyclone channels, which are connected to the air inlet. Each of the cyclone channels is inclined from the inner reference surface of the ceramic cyclone insulator at a preset angle and a preset direction; The electrode head is detachably connected to the end of the ceramic cyclone insulator near the nozzle and is housed in the front barrel.

2. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, Multiple cyclone channels are evenly distributed within the ceramic cyclone insulator, and each cyclone channel has the same inclination direction.

3. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The nozzle is connected to a nozzle, and the nozzle has multiple airflow channels. The inclination angle of the airflow channels is the same as that of the cyclone channels.

4. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The cable module is connected to the end of the rear gun barrel furthest from the nozzle by either a plug-in connection or a bolt connection. The cable module is connected to the electrical components inside the atmospheric pressure plasma spray gun.

5. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The cable module includes a high-voltage line, a ground wire, and a gas pipe; Both the high-voltage line and the ground wire are wrapped with an insulating shielding layer. The innermost layer of the insulating shielding layer is a high-temperature resistant insulating layer, the middle layer is a metal shielding mesh, and the outermost layer is a wear-resistant protective layer.

6. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The nozzle, the front barrel, the middle barrel, and the rear barrel are all made of high-temperature resistant and corrosion-resistant metal materials.

7. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The inner wall of the cyclone channel of the ceramic cyclone insulator is provided with a nano-level insulating coating.

8. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The ceramic cyclone insulator has a sealing groove at one end near the nozzle, and a sealing ring is installed in the sealing groove.

9. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The outer surface of the ceramic cyclone insulator is provided with anti-slip texture.

10. The atmospheric pressure plasma spray gun according to claim 1, characterized in that, The inner diameters of the front barrel, the middle barrel, and the rear barrel are set in a preset proportional relationship.

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