A plasma nozzle

Abstract

The present invention discloses a plasma nozzle comprising a matching guide body and a nozzle body. The guide body has a first tapered channel at the end away from the nozzle body, and a second tapered channel at the end of the nozzle body near the guide body. The guide body is also provided with a through hole connecting the first tapered channel and the second tapered channel, and a pressure divider hole. The pressure divider holes are multiple and spaced around the through hole. The nozzle body has an output hole connecting the second tapered channel with the outside world at the end away from the guide body. The plasma nozzle provided by the present invention enables the plasma flame ejected from the plasma nozzle to be suitable for surface treatment of products that are not resistant to high temperatures, such as textiles, effectively preventing surface burns during treatment and ensuring the desired treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma processing, and in particular to a plasma nozzle. Background Art

[0002] Plasma is an ionized gaseous substance composed of positive and negative ions produced by the ionization of atoms and atomic groups that have been stripped of some of their electrons. Plasma is an excellent conductor and can be captured, moved, and accelerated using cleverly designed magnetic fields. The development of plasma physics has provided new technologies and techniques for the further development of sciences such as materials, energy, information, environmental space, space physics, and geophysics. Therefore, the application of plasma is very extensive, including the digital industry, electronics industry, automotive industry, and printing and packaging industry.

[0003] The spray guns on existing plasma treatment equipment are divided into two types: DC spray guns and rotary spray guns. DC spray guns are suitable for products that need to be treated in a small and narrow range. However, during the treatment process, the energy is concentrated and the plasma flame ejected from the DC spray gun has a high temperature. When treating products that are not resistant to high temperatures, it is easy to cause burns on the product surface. This not only fails to achieve the intended purpose of plasma treatment, but also results in poor product quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a plasma nozzle suitable for products that are not resistant to high temperatures.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a plasma nozzle, including a matching guide body and a nozzle body, the guide body has a first tapered channel at the end away from the nozzle body, and the nozzle body has a second tapered channel at the end close to the guide body. The guide body is also provided with a through hole and a pressure dividing hole connecting the first tapered channel and the second tapered channel. There are multiple pressure dividing holes and the pressure dividing holes are arranged at intervals around the through hole. The end of the nozzle body away from the guide body is provided with an output hole connecting the second tapered channel with the outside world.

[0006] The beneficial effect of the present invention is that the plasma nozzle provided by the present invention includes a matching guide body and a nozzle body, wherein the guide body has a first tapered channel, the nozzle body has a second tapered channel, and the guide body is provided with a through hole and a pressure dividing hole connecting the first tapered channel and the second tapered channel, and multiple pressure dividing holes are arranged around the through hole. When treating the surface of the product, the plasma generated by the spray gun first enters the first tapered channel and gathers along the first tapered channel, and then part of the plasma passes through the through hole to enter the second tapered channel, and another part of the plasma passes through the pressure dividing hole to enter the second tapered channel. Since the pressure of the plasma entering the second tapered channel from the through hole is different from that of the plasma entering the second tapered channel from the pressure dividing hole, the two plasmas converge in the second tapered channel and generate a vortex in the second tapered channel, thereby reducing the temperature of the plasma in the second tapered channel. The plasma with reduced temperature is then discharged from the output hole along the second tapered channel and reaches the surface of the product, so that the plasma flame ejected from the plasma nozzle is suitable for surface treatment of products that are not resistant to high temperatures, such as textiles, effectively preventing the surface of the product from being burned during the treatment process, and ensuring that the expected treatment effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the structure of a plasma nozzle according to the first embodiment of the present invention;

[0008] Figure 2 is a cross-sectional view of a plasma nozzle according to a first embodiment of the present invention;

[0009] Figure 3 This is an exploded view of the plasma nozzle according to the first embodiment of the present invention;

[0010] Figure 4 Schematic diagram of the structure of the flow guide in the plasma nozzle according to the first embodiment of the present invention;

[0011] Figure 5 This is a schematic structural diagram of the nozzle body in the plasma nozzle according to the first embodiment of the present invention.

[0012] Description of labels:

[0013] 1. Body guide; 11. First tapered channel; 12. Through hole; 13. Pressure dividing hole; 14. Extension; 15. Section; 16. Chamber; 2. Nozzle body; 21. Second tapered channel; 22. Output hole; 23. Protrusion; 24. Blind hole. DETAILED DESCRIPTION

[0014] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0015] Please refer to Figures 1 to 5A plasma nozzle includes a matching guide body 1 and a nozzle body 2. The end of the guide body 1 away from the nozzle body 2 has a first tapered channel 11, and the end of the nozzle body 2 close to the guide body 1 has a second tapered channel 21. The guide body 1 is also provided with a through hole 12 and a pressure dividing hole 13 connecting the first tapered channel 11 and the second tapered channel 21. There are multiple pressure dividing holes 13 and the pressure dividing holes 13 are arranged at intervals around the through hole 12. The end of the nozzle body 2 away from the guide body 1 is provided with an output hole 22 connecting the second tapered channel 21 with the outside world.

[0016] From the above description, it can be seen that the beneficial effect of the present invention is that the plasma nozzle provided by the present invention can make the plasma flame ejected from the plasma nozzle suitable for surface treatment of products that are not resistant to high temperatures, such as textiles, effectively preventing the surface of the product from being burned during the treatment process, and ensuring that the expected treatment effect is achieved.

[0017] Furthermore, the guide body 1 has an extension portion 14 at one end close to the nozzle body 2 , and the extension portion 14 forms a chamber 16 for accommodating a portion of the nozzle body 2 .

[0018] As can be seen from the above description, the extension portion 14 provided on the flow guide 1 forms a chamber 16 to accommodate part of the nozzle body 2, so that the connection between the flow guide 1 and the nozzle body 2 is tight. The extension portion 14 can also prevent plasma from leaking from the gap between the flow guide 1 and the nozzle body 2, ensuring that the plasma is stably ejected from the output hole 22.

[0019] Furthermore, the nozzle body 2 has a protruding portion 23 at one end away from the guide body 1 , and the protruding portion 23 abuts against the extending portion 14 .

[0020] As can be seen from the above description, the protrusion 23 abutting against the extension 14 is provided on the nozzle body 2 to facilitate the assembly of the nozzle body 2 and the guide body 1 when assembling the plasma nozzle, thereby preventing a gap from being formed between the nozzle body 2 and the guide body 1.

[0021] Furthermore, a surface of the extension portion 14 close to the nozzle body 2 has a first threaded portion, and the nozzle body 2 is provided with a second threaded portion that matches the first threaded portion.

[0022] From the above description, it can be seen that the guide body 1 and the nozzle body 2 are assembled by the cooperation of the first threaded portion and the second threaded portion, which not only ensures a firm connection between the guide body 1 and the nozzle body 2, but also improves the sealing of the plasma nozzle to prevent plasma leakage.

[0023] Furthermore, two blind holes 24 are provided at intervals on the end surface of the nozzle body 2 away from the flow guide 1 .

[0024] From the above description, it can be seen that the two blind holes 24 spaced apart on the end face of the nozzle body 2 are used to match the tool with the nozzle body 2, and the nozzle body 2 is rotated relative to the guide body 1 by operating the tool to ensure that the nozzle body 2 and the guide body 1 are tightly matched, while facilitating the disassembly of the plasma nozzle to replace parts.

[0025] Furthermore, two cut surfaces 15 are provided on the outer peripheral wall of the extension portion 14 , and the two cut surfaces 15 are arranged opposite to each other.

[0026] As can be seen from the above description, the cut surface 15 provided on the extension portion 14 is used to clamp the guide body 1 with a tool, so as to fix the position of the guide body 1 and facilitate installation or removal of the nozzle body 2 on the guide body 1 .

[0027] Furthermore, the output hole 22 is aligned with the through hole 12 .

[0028] As can be seen from the above description, the through hole 12 is arranged to be aligned with the output hole 22 so that part of the plasma entering the second tapered channel 21 from the output hole 22 can be smoothly ejected from the plasma nozzle from the output hole 22 .

[0029] Furthermore, the inner circumferential wall of the second tapered channel 21 is parallel to the inner circumferential wall of the first tapered channel 11 .

[0030] As can be seen from the above description, the inner circumferential wall of the second tapered channel 21 is arranged parallel to the inner circumferential wall of the first tapered channel 11 , so that the plasma can flow smoothly in the guide body 1 and the nozzle body 2 .

[0031] Furthermore, the included angle between two generatrixes on the same axial section of the inner peripheral wall of the first tapered channel 11 is 70°.

[0032] Furthermore, a third threaded portion is provided on the outer peripheral wall of the end of the guide body 1 away from the nozzle body 2 .

[0033] As can be seen from the above description, a third threaded portion is provided on the flow guide 1 for connecting the flow guide 1 with the spray gun, so as to fix the plasma nozzle and the spray gun and enable the plasma generated by the spray gun to stably enter the plasma nozzle.

[0034] Example 1

[0035] Please refer to Figures 1 to 5 , embodiment 1 of the present invention is: a plasma nozzle, installed on a DC spray gun, used to cool the plasma generated by the DC spray gun and guide the plasma to be ejected, so that the temperature of the plasma flame ejected by the DC spray gun can process products that are not resistant to high temperatures.

[0036] Please combine Figure 1 and Figure 2The plasma nozzle includes a guide body 1 and a nozzle body 2 matched with the guide body 1, the guide body 1 has a first tapered channel 11 connected to the DC spray gun at one end away from the nozzle body 2, and the diameter of the first tapered channel 11 at the end away from the nozzle body 2 is larger than the diameter of the end close to the nozzle body 2, the nozzle body 2 has a second tapered channel 21 at one end close to the guide body 1, the diameter of the second tapered channel 21 at one end close to the guide body 1 is larger than the diameter of the end away from the guide body 1, and the guide body 1 is provided with a through hole 12 and a pressure dividing hole 13 respectively connecting the first tapered channel 11 and the second tapered channel 21, the number of the pressure dividing holes 13 is multiple and the multiple pressure dividing holes 13 are spaced around the through hole 12, and the nozzle body 2 is provided with an output hole 22 connecting the second tapered channel 21 with the outside world at one end away from the guide body 1.

[0037] Specifically, the DC spray gun excites nitrogen, oxygen, hydrogen, argon, helium, methane or propane and other working gases to generate plasma, which first enters the first conical channel 11 and moves along the inner wall of the first conical channel 11 toward the direction close to the second conical channel 21. Then, part of the plasma enters the second conical channel 21 from the through hole 12, and the other part enters the second conical channel 21 from the pressure dividing hole 13. Since part of the heat of the plasma will be conducted to the outside by the guide body 1 when it moves in the pressure dividing hole 13, the pressure of the plasma entering the second conical channel 21 from the through hole 12 is different from the pressure of the plasma entering the second conical channel 21 from the pressure dividing hole 13, and the pressure of the plasma entering the second conical channel 21 from the through hole 12 is different from the pressure of the plasma entering the second conical channel 21 from the pressure dividing hole 13. The plasma entering the second conical channel 21 from the pressure dividing hole 13 will collide with the inner wall of the second conical channel 21, and then the two plasmas will merge to generate a vortex in the second conical channel 21, so that the high-heat plasma will be retained in the second conical channel 21 and transfer the heat of the plasma to the outside through the nozzle body 2. The plasma retained in the second conical channel 21 is blown by the plasma that enters the second conical channel 21 later and moves along the inner wall of the second conical channel 21, and finally ejected from the plasma nozzle from the output hole 22, so that the ejected plasma flame is concentrated while reducing the temperature of the plasma flame to meet the processing requirements of products whose surfaces are not resistant to high temperatures, such as textiles.

[0038] like Figure 3As shown, in order to facilitate the assembly of the plasma nozzle, the end of the flow guide 1 close to the nozzle body 2 has an extension portion 14, the extension portion 14 is annular and surrounds a chamber 16 for accommodating part of the nozzle body 2, and the end of the nozzle body 2 away from the flow guide 1 has a protrusion 23. After part of the nozzle body 2 is inserted into the chamber 16, the protrusion 23 abuts against the end of the extension portion 14. By wrapping part of the nozzle body 2 with the extension portion 14, the connection between the flow guide 1 and the nozzle body 2 can be made tight, so as to prevent plasma from leaking from the gap between the flow guide 1 and the nozzle body 2, and ensure that the plasma excited by the DC spray gun is stably ejected from the output hole 22.

[0039] In detail, a first threaded portion is provided on a surface of the extension portion 14 close to the nozzle body 2 and on an inner peripheral wall of the extension portion 14, and a second threaded portion is provided on the nozzle body 2 to cooperate with the first threaded portion. After aligning the nozzle body 2 with the guide body 1, the nozzle body 2 can be rotated to fix the nozzle body 2 on the guide body 1 through the engagement of the first threaded portion and the second threaded portion, so that the connection between the guide body 1 and the nozzle body 2 is firm, while improving the sealing performance of the plasma nozzle, and when either the guide body 1 or the nozzle body 2 is damaged, the two can be separated and replaced by rotating the nozzle body 2, which facilitates maintenance of the plasma nozzle.

[0040] like Figure 4 and Figure 5 As shown, two cut surfaces 15 are further provided on the outer peripheral wall of the extension portion 14, and the two cut surfaces 15 are respectively located on opposite sides of the extension portion 14. The two cut surfaces 15 are arranged in parallel, and the cut surfaces 15 are used to clamp the guide body 1 with a tool to fix the guide body 1 when assembling or disassembling the plasma nozzle, and two blind holes 24 are provided at intervals on the end surface of the nozzle body 2 away from the guide body 1. When assembling or disassembling the plasma nozzle, a tool can be used to reach into the blind holes 24 to turn the nozzle body 2 so that the nozzle body 2 rotates relative to the guide body 1, so as to tighten the nozzle body 2 on the guide body 1 so that the nozzle body 2 is tightly connected to the guide body 1, or the nozzle body 2 can be removed from the guide body 1 for replacement.

[0041] Please combine Figure 2 、 Figure 4 and Figure 5The inner circumferential wall of the second tapered channel 21 is parallel to the inner circumferential wall of the first tapered channel 11, and the angle between the two generatrixes on the same axial section of the inner circumferential wall of the first tapered channel 11 is 70°, that is, the angle between the two generatrixes on the same axial section of the inner circumferential wall of the second tapered channel 21 is also 70°, so that the plasma can flow smoothly in the guide body 1 and the nozzle body 2, and at the same time, the output hole 22 is aligned with the through hole 12, so that the plasma retained in the second tapered channel 21 is blown by the plasma that enters the second tapered channel 21 from the through hole 12 and is smoothly ejected from the output hole 22 out of the plasma nozzle.

[0042] Specifically, in this embodiment, the diameter of the through hole 12 is 3 mm, the number of the pressure dividing holes 13 is 8, and the 8 pressure dividing holes 13 are arranged at equal intervals around the through hole 12. The horizontal distance between the center of each pressure dividing hole 13 and the center of the through hole 12 is 12 mm, and the diameter of each pressure dividing hole 13 is 1.5 mm, so that the plasma entering the first conical channel 11 from the DC spray gun can be stably diverted to the through hole 12 and the pressure dividing holes 13, thereby avoiding the plasma from concentrating on the through hole 12, resulting in the pressure dividing hole 13 being unable to play the preset role, and preventing the insufficient amount of plasma output from the output hole 22 due to insufficient amount of plasma passing through the through hole 12 into the second conical channel 21. The diameter of the output hole 22 is 2 mm, so that the length of the flame formed by the plasma blown out from the output hole 22 meets the usage requirements.

[0043] like Figure 3 and Figure 4 As shown, in order to facilitate the combination of the plasma nozzle and the DC spray gun, a third threaded portion is provided on the outer peripheral wall of the end of the guide body 1 away from the nozzle body 2. The third threaded portion cooperates with the DC spray gun to fix the plasma nozzle to the end of the DC spray gun, preventing the plasma nozzle from loosening while ensuring that the plasma nozzle and the DC spray gun are tightly connected.

[0044] In summary, the plasma nozzle provided by the present invention uses a through hole and a pressure divider hole provided on the nozzle body to divert the plasma in the first conical channel. The plasma loses part of the heat when flowing in the pressure divider hole. After the diverted plasma enters the second conical channel, a vortex is generated and part of the heat is lost again, thereby reducing the temperature of the plasma flame ejected from the output hole, so that the plasma flame ejected from the plasma nozzle is suitable for surface treatment of products that are not resistant to high temperatures, such as textiles, effectively preventing the surface of the product from being burned during the treatment process, and ensuring that the expected treatment effect is achieved; the plasma nozzle is composed of a guide body and a nozzle body. The guide body has an extension that wraps part of the nozzle body, and a protrusion that abuts the extension is provided on the nozzle body, and the guide body and the nozzle body are fixed by a threaded connection, which is convenient for assembly and disassembly of the plasma nozzle and later maintenance, and also ensures that the connection between the guide body and the nozzle body is tight, effectively preventing plasma from leaking from the gap between the guide body and the nozzle body, thereby improving the reliability of the plasma nozzle.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plasma nozzle, characterized in that: The invention comprises a matching guide body and a nozzle body, wherein the end of the guide body away from the nozzle body has a first tapered channel, and the end of the nozzle body close to the guide body has a second tapered channel. The guide body is also provided with a through hole and a pressure dividing hole connecting the first tapered channel and the second tapered channel. There are multiple pressure dividing holes and the pressure dividing holes are arranged at intervals around the through hole. The end of the nozzle body away from the guide body is provided with an output hole connecting the second tapered channel and the outside world; the plasma generated by the spray gun first enters the first tapered channel and gathers along the first tapered channel, part of the plasma passes through the through hole to enter the second tapered channel, and another part of the plasma passes through the pressure dividing hole to enter the second tapered channel. After the two plasmas converge in the second tapered channel, a vortex is generated in the second tapered channel.

2. The plasma nozzle according to claim 1, characterized in that: An end of the guide body close to the nozzle body has an extension portion, and the extension portion surrounds a cavity that accommodates a portion of the nozzle body.

3. The plasma nozzle according to claim 2, characterized in that: One end of the nozzle body away from the flow guide has a protrusion, and the protrusion abuts against the extension portion.

4. The plasma nozzle according to claim 2, wherein: A first threaded portion is provided on a side of the extension portion close to the nozzle body, and a second threaded portion matching the first threaded portion is provided on the nozzle body.

5. The plasma nozzle according to claim 4, characterized in that: Two blind holes are provided at intervals on the end surface of the nozzle body away from the flow guide.

6. The plasma nozzle according to claim 2, characterized in that: Two cut surfaces are provided on the outer peripheral wall of the extension portion, and the two cut surfaces are arranged opposite to each other.

7. The plasma nozzle according to claim 1, characterized in that: The output hole is aligned with the through hole.

8. The plasma nozzle according to claim 1, wherein: The inner peripheral wall of the second tapered channel is parallel to the inner peripheral wall of the first tapered channel.

9. The plasma nozzle according to claim 8, characterized in that: The included angle between two generatrixes on the same axial section of the inner peripheral wall of the first tapered channel is 70°.

10. The plasma nozzle according to claim 1, characterized in that: A third threaded portion is provided on an outer peripheral wall of an end of the guide body away from the nozzle body.

Images