Normal-pressure plasma rotary spray gun

Abstract

The utility model provides a normal-pressure plasma rotary spray gun. The normal-pressure plasma rotary spray gun comprises a spray head, a split front gun barrel, a rear gun barrel, a driving rear cover, a high-voltage wire, an electrode tip and an intermediate shaft, the split front gun barrel comprises a front connecting pipe and a rear connecting pipe which are detachably connected, the front connecting pipe is detachably connected with the spray head, and the rear connecting pipe is rotationally connected with the rear gun barrel; the middle shaft is fixedly connected with the driving rear cover and contained in the rear gun barrel, and the driving rear cover is detachably connected with the end, away from the spray head, of the rear gun barrel. A high-voltage wire penetrates through the middle shaft, a connecting piece is arranged in the rear connecting pipe, one end, close to the spray head, of the connecting piece is detachably connected with the electrode tip, and the other end of the connecting piece is fixedly connected with the high-voltage wire through a wiring terminal. The front connecting pipe and the rear connecting pipe of the split front gun barrel, the driving rear cover and the rear gun barrel are all detachable, so that the parts are convenient to detach, replace and maintain when damaged or maintained, the maintenance cost and difficulty are reduced, and the maintainability is improved.

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 rotary spray gun. Background Technology

[0002] In industrial production and scientific research, plasma technology, with its unique physical and chemical properties, has been widely used in material surface treatment, thin film deposition, and etching. Atmospheric pressure plasma treatment technology, in particular, has become a research and application hotspot due to its advantages such as not requiring a vacuum environment and being able to process continuously online.

[0003] Currently, traditional spray guns have shortcomings in their high-voltage connection structure, and the connection method of the high-voltage line is not stable enough. In addition, existing spray guns are inconvenient in terms of electrode head replacement.

[0004] Therefore, developing a connection structure for an atmospheric pressure plasma rotary spray gun that is structurally sound, stable in performance, easy to maintain, and can effectively improve the treatment effect is of great practical significance. Utility Model Content

[0005] In view of the aforementioned problems, this application is made to provide an atmospheric pressure plasma rotary spray gun that overcomes or at least partially solves the problems, comprising a nozzle, a split front barrel, a rear barrel, a drive rear cover, a high-voltage wire, an electrode head, and an intermediate shaft; the split front barrel includes a detachably connected front connecting pipe and a rear connecting pipe, the front connecting pipe being detachably connected to the nozzle, and the rear connecting pipe being rotatably connected to the rear barrel; the intermediate shaft is fixedly connected to the drive rear cover and housed within the rear barrel, the drive rear cover being detachably connected to the end of the rear barrel away from the nozzle; the high-voltage wire passes through the intermediate shaft, and a connector is provided within the rear connecting pipe, the end of the connector near the nozzle being detachably connected to the electrode head, and the other end of the connector being fixedly connected to the high-voltage wire via a terminal block.

[0006] Optionally, it also includes ceramic cyclone components;

[0007] The ceramic cyclone component covers the wiring terminal and is connected to the end of the intermediate shaft near the nozzle.

[0008] Optionally, it also includes an intake manifold;

[0009] The air intake pipe is located inside the intermediate shaft and is connected to the ceramic cyclone component.

[0010] Optionally, the drive cover contains a motor drive module, which is electrically connected to an external power source.

[0011] Optionally, the nozzle is frustum-shaped, and one end of the nozzle near the front connector is provided with an external thread, which is threadedly connected to the internal thread in the front connector.

[0012] Optionally, the ceramic cyclone component is a hollow cylinder with an annular protrusion at one end near the electrode connector, and a groove at the corresponding position of the electrode connector, wherein the annular protrusion and the groove are adapted to each other.

[0013] Optionally, the electrode is rod-shaped, and its diameter and length are adapted to the internal space of the split front barrel.

[0014] Optionally, a rolling bearing is provided at the rotatable connection between the rear connecting pipe and the rear gun barrel, wherein the inner ring of the rolling bearing is fixedly connected to the rear connecting pipe and the outer ring is fixedly connected to the rear gun barrel.

[0015] Optionally, the high-voltage line is covered with an insulating protective sleeve, the insulating protective sleeve being made of rubber or silicone.

[0016] Optionally, the detachable connection between the front connecting pipe and the rear connecting pipe is a threaded connection, and an anti-loosening nut is provided at the threaded connection.

[0017] This application has the following advantages:

[0018] In the embodiments of this application, addressing the shortcomings of existing atmospheric pressure plasma spray guns in terms of high-voltage connection structure and the instability of high-voltage line connection, this application provides an atmospheric pressure plasma rotary spray gun, including a nozzle, a split front barrel, a rear barrel, a drive rear cover, a high-voltage line, an electrode head, and an intermediate shaft; the split front barrel includes a detachably connected front connecting pipe and a rear connecting pipe, the front connecting pipe being detachably connected to the nozzle, and the rear connecting pipe being rotatably connected to the rear barrel; the intermediate shaft is fixedly connected to the drive rear cover and housed within the rear barrel, the drive rear cover being detachably connected to the end of the rear barrel away from the nozzle; the high-voltage line passes through the intermediate shaft, and a connector is provided within the rear connecting pipe, the end of the connector near the nozzle being detachably connected to the electrode head, and the other end of the connector being fixedly connected to the high-voltage line via a terminal block. Detachable Components: The front and rear connecting pipes of the split front gun barrel, as well as the drive cover and rear gun barrel, are all detachable, facilitating disassembly, replacement, and repair when components are damaged or require maintenance, reducing maintenance costs and difficulty, and improving maintainability. The rear connecting pipe is rotatably connected to the rear gun barrel, allowing the nozzle to rotate relative to the rear gun barrel. This allows for flexible adjustment of the spray direction and angle in different working scenarios, improving operational flexibility and applicability. The high-voltage wire is run through the intermediate shaft, hidden inside the spray gun, reducing exposure, minimizing external force damage and contact hazards, and improving operational safety. One end of the connector inside the rear connecting pipe is detachable from the electrode head, facilitating periodic replacement due to wear and allowing for the replacement of different specifications and materials of electrode heads to optimize performance according to work requirements. The other end of the connector is fixed to the high-voltage wire via a terminal block, ensuring a stable and reliable electrical connection and reducing electrical faults caused by loosening. Attached Figure Description

[0019] 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.

[0020] Figure 1 This application provides a schematic diagram of the overall structure of a normal pressure plasma rotary spray gun.

[0021] Figure 2 A partial structural schematic diagram of a rotary plasma spray gun under atmospheric pressure provided in this application is shown.

[0022] The reference numerals in the accompanying drawings are as follows:

[0023] 1. Nozzle; 2. Separate front barrel; 3. Rear barrel; 4. Drive cover; 5. High voltage wire; 6. Electrode head; 7. Intermediate shaft; 8. Front connecting pipe; 9. Rear connecting pipe; 10. Ceramic cyclone component; 11. Terminal block; 12. Air inlet pipe; 13. Motor drive module; 14. Connector; 15. Annular protrusion; 16. Groove. Detailed Implementation

[0024] 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.

[0025] The inventors, through analysis of existing technologies, discovered that traditional spray guns have shortcomings in their high-voltage connection structures. The connection method of the high-voltage lines is not stable enough, affecting the normal operation and service life of the spray gun. Furthermore, most spray guns exhibit uneven airflow distribution when generating plasma, resulting in poor plasma activity and treatment effect. In addition, existing spray guns present inconvenience in replacing the electrode head. Replacing the electrode head often requires complex operations on the high-voltage connection points, increasing the difficulty for operators and potentially leading to safety accidents due to improper operation.

[0026] Please refer to Figure 1-2 The diagram shows a schematic of the structure of a normal pressure plasma rotary spray gun provided in this application.

[0027] A normal pressure plasma rotary spray gun includes a nozzle 1, a split front barrel 2, a rear barrel 3, a drive rear cover 4, a high-voltage wire 5, an electrode head 6, and an intermediate shaft 7. The split front barrel 2 includes a detachably connected front connecting pipe 8 and a rear connecting pipe 9. The front connecting pipe 8 is detachably connected to the nozzle 1, and the rear connecting pipe 9 is rotatably connected to the rear barrel 3. The intermediate shaft 7 is fixedly connected to the drive rear cover 4 and housed within the rear barrel 3. The drive rear cover 4 is detachably connected to the end of the rear barrel 3 away from the nozzle 1. The high-voltage wire 5 passes through the intermediate shaft 7. A connector 14 is provided within the rear connecting pipe 9. The end of the connector 14 near the nozzle 1 is detachably connected to the electrode head 6, and the other end of the connector 14 is fixedly connected to the high-voltage wire 5 via a terminal block 11.

[0028] In the embodiments of this application, addressing the shortcomings of existing atmospheric pressure plasma spray guns in terms of high-pressure connection structure and the unstable connection method of the 5 high-pressure lines, this application provides an atmospheric pressure plasma rotary spray gun, including a nozzle 1, a split front barrel 2, a rear barrel 3, a drive rear cover 4, a high-pressure line 5, an electrode head 6, and an intermediate shaft 7; the split front barrel 2 includes a detachably connected front connecting pipe 8 and a rear connecting pipe 9, the front connecting pipe 8 being detachably connected to the nozzle 1, and the rear connecting pipe 9 being rotatably connected to the rear barrel 3; the intermediate shaft 7 is fixedly connected to the drive rear cover 4 and housed within the rear barrel 3, the drive rear cover 4 being detachably connected to the end of the rear barrel 3 away from the nozzle 1; the high-pressure line 5 passes through the intermediate shaft 7, and the rear connecting pipe 9 is provided with a connector 14, the end of the connector 14 near the nozzle 1 being detachably connected to the electrode head 6, and the other end of the connector 14 being fixedly connected to the high-pressure line 5 through a terminal block 11. Detachable Components: The front connecting pipe 8 and rear connecting pipe 9 of the split front gun barrel 2, as well as the drive rear cover 4 and rear gun barrel 3, are all detachable, facilitating disassembly, replacement, and repair when components are damaged or require maintenance, reducing maintenance costs and difficulty, and improving maintainability. The rear connecting pipe 9 is rotatably connected to the rear gun barrel 3, allowing the nozzle 1 to rotate relative to the rear gun barrel 3. This allows for flexible adjustment of the spray direction and angle in different working scenarios, improving operational flexibility and applicability. The high-voltage wire 5 is run through the intermediate shaft 7, hidden inside the spray gun, reducing exposure, minimizing external force damage and contact hazards, and improving safety. One end of the connector 14 inside the rear connecting pipe 9 is detachable from the electrode head 6, facilitating periodic replacement due to wear and allowing for the replacement of electrode heads 6 with different specifications and materials to optimize performance according to work requirements. The other end of the connector 14 is fixed to the high-voltage wire 5 via the terminal block 11, ensuring a stable and reliable electrical connection and reducing electrical faults caused by loosening.

[0029] The following will further describe an atmospheric pressure plasma rotary spray gun in this exemplary embodiment. Please refer to [link / reference needed] for details. Figures 1-2 .

[0030] In one embodiment of this application, the atmospheric pressure plasma rotary spray gun further includes a ceramic cyclone element 10, which covers the terminal block 11 and is connected to the end of the intermediate shaft 7 near the nozzle 1. The atmospheric pressure plasma rotary spray gun also includes an air inlet pipe 12; the air inlet pipe 12 is disposed inside the intermediate shaft 7 and communicates with the ceramic cyclone element 10.

[0031] It should be noted that the ceramic cyclone component 10 mainly serves as insulation and airflow guide. It covers the terminal block 11 to ensure the safe transmission of high-voltage electricity, while also converting compressed air into a uniform rotating airflow.

[0032] In one embodiment of this application, the nozzle 1 is frustum-shaped, and the end of the nozzle 1 near the front connector 14 is provided with an external thread, which is threadedly connected to the internal thread in the front connector 14. The ceramic cyclone component 10 is a hollow cylinder, and the end near the electrode connector is provided with an annular protrusion 15. The electrode connector is provided with a groove 16 at a corresponding position, and the annular protrusion 15 is adapted to the groove 16.

[0033] It should be noted that, through the frustum-shaped design of the nozzle 1 and the hollow cylindrical design of the ceramic cyclone component 10, the spray gun can efficiently generate and eject plasma, making it suitable for processing large-area vertical surfaces. The threaded connection between the nozzle 1 and the front connector 14, as well as the connection between the ceramic cyclone component 10 and the electrode connector via the annular protrusion 15 and the groove 16, make the installation, disassembly, and maintenance of the spray gun simpler, improving the overall efficiency and reliability of the equipment.

[0034] In one embodiment of this application, the electrode is rod-shaped, and its diameter and length are adapted to the internal space of the split front barrel 2. A motor drive module 13 is provided inside the drive rear cover 4, and the motor drive module 13 is electrically connected to an external power source. The detachable connection between the front connecting pipe 8 and the rear connecting pipe 9 is a threaded connection, and an anti-loosening nut is provided at the threaded connection. A rolling bearing is provided at the rotatable connection between the rear connecting pipe 9 and the rear barrel 3; the inner ring of the rolling bearing is fixedly connected to the rear connecting pipe 9, and the outer ring is fixedly connected to the rear barrel 3. The high-voltage line 5 is covered with an insulating protective sleeve, the material of which is rubber or silicone.

[0035] It should be noted that the motor drive module 13 is electrically connected to an external power supply, ensuring stable motor operation. The design of the motor drive module 13 allows the spray gun to adjust its rotation speed according to actual needs, thereby controlling the plasma spraying effect. Furthermore, the motor drive module 13 also has overload protection, automatically cutting off power in case of excessive current or overload, protecting the motor and other components of the spray gun from damage.

[0036] It should be noted that through the rod-shaped design of the electrodes, the integration of the motor drive module 13, the threaded connection between the front connecting pipe 8 and the rear connecting pipe 9, the rolling bearing connection between the rear connecting pipe 9 and the rear gun barrel 3, and the insulating protective sleeve design of the high-voltage line 5, the spray gun can operate efficiently and stably, making it suitable for treating large-area vertical surfaces. This design not only improves the performance and reliability of the spray gun but also simplifies the installation and maintenance of the equipment.

[0037] 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.

[0038] 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.

[0039] The above provides a detailed description of an atmospheric pressure plasma rotary 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 plasma rotary lance characterized by, The nozzle, the split front barrel, the rear barrel, the driving rear cover, the high-voltage wire, the electrode head and the intermediate shaft are included. The split front barrel includes detachably connected front and rear connecting pipes, the front connecting pipe is detachably connected with the nozzle, and the rear connecting pipe is rotationally connected with the rear barrel. The intermediate shaft is fixedly connected with the driving rear cover and is accommodated in the rear barrel, and the driving rear cover is detachably connected with the rear barrel away from the nozzle. The high-voltage wire is arranged in the intermediate shaft, the rear connecting pipe is provided with a connecting piece, one end of the connecting piece close to the nozzle is detachably connected with the electrode head, and the other end of the connecting piece is fixedly connected with the high-voltage wire through a terminal.

2. The atmospheric plasma rotary jet according to claim 1, characterized in that The ceramic cyclone part is further included. The ceramic cyclone part is wrapped around the terminal and is connected with one end of the intermediate shaft close to the nozzle.

3. The atmospheric plasma rotary jet according to claim 2, wherein, The air inlet pipe is further included. The air inlet pipe is arranged in the intermediate shaft and is communicated with the ceramic cyclone part.

4. The atmospheric plasma rotary jet according to claim 1, wherein The driving rear cover is provided with a motor driving module, and the motor driving module is electrically connected with an external power supply.

5. The atmospheric plasma rotary jet according to claim 1, wherein, The nozzle is in the shape of a circular truncated cone, one end of the nozzle close to the connecting piece is provided with external threads, and the external threads are threadedly connected with internal threads in the connecting piece.

6. The atmospheric plasma rotary jet as defined in claim 2, wherein The ceramic cyclone part is in the shape of a hollow cylinder, one end of the ceramic cyclone part close to the electrode head is provided with an annular protrusion, the electrode head is provided with a groove at a corresponding position, and the annular protrusion is matched with the groove.

7. The atmospheric plasma rotary jet according to claim 1, wherein The electrode is in the shape of a rod, and the diameter and length of the electrode are matched with the internal space of the split front barrel.

8. The atmospheric plasma rotary jet as defined in claim 4, wherein, Rolling bearings are arranged at the rotationally connected positions of the rear connecting pipe and the rear barrel, the inner ring of the rolling bearing is fixedly connected with the rear connecting pipe, and the outer ring of the rolling bearing is fixedly connected with the rear barrel.

9. The atmospheric plasma rotary jet as defined in claim 4, wherein, The high-voltage wire is provided with an insulating protective sleeve, and the material of the insulating protective sleeve is rubber or silica gel.

10. The atmospheric plasma rotary jet according to claim 1, wherein, The detachable connection between the front connecting pipe and the rear connecting pipe is screw connection, and a lock nut is arranged at the screw connection position.

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