A plasma nozzle

Abstract

The present invention discloses a plasma nozzle, comprising a nozzle body, wherein the first nozzle and the second nozzle are respectively provided at opposite ends of the nozzle body, the first nozzle and the second nozzle are respectively circular and the diameter of the first nozzle is larger than the diameter of the second nozzle, an injection channel connecting the first nozzle and the second nozzle is provided in the nozzle body, the inner peripheral wall of the injection channel is tapered, and a plurality of third nozzles are also provided at one end of the nozzle body having the second nozzle, the third nozzles are linear and arranged radially, and the third nozzles are connected to the injection channel. The plasma nozzle provided by the present invention generates a plasma flame with a length of 30 to 40 mm, and the instantaneous temperature of the plasma flame can reach above 200°C to reach the temperature required for processing metal products, and can process metal products of various sizes, with strong versatility.

Description

Technical Field

[0001] The invention relates to the technical field of plasma processing equipment, 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 deprived of some of their electrons. Plasma is a very good conductor and can be captured, moved and accelerated using cleverly designed magnetic fields. The development of plasma physics has provided new technologies and processes 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] Existing plasma treatment equipment mainly consists of rotary spray guns, DC spray guns and wide-width plasma machines. The length of the plasma flame generated by a conventional DC spray gun is generally 0 to 20 mm. The short length leads to an insufficient treatment range and cannot meet the treatment requirements of large-sized metal products. In addition, the temperature generated instantaneously is low, and the effect of treating metal products is not ideal. Therefore, a plasma nozzle is needed that can enable the DC spray gun to generate a longer flame, increase the treatment range of the DC spray gun, and increase the instantaneous temperature generated by the DC spray gun, which is conducive to high-temperature treatment of metal products. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a plasma nozzle capable of performing high-temperature treatment on metal products.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a plasma nozzle, including a nozzle body, wherein a first nozzle and a second nozzle are respectively provided at opposite ends of the nozzle body, the first nozzle and the second nozzle are respectively circular and the diameter of the first nozzle is larger than the diameter of the second nozzle, an injection channel connecting the first nozzle and the second nozzle is provided in the nozzle body, the inner circumferential wall of the injection channel is conical, and a plurality of third nozzles are also provided at one end of the nozzle body having the second nozzle, the third nozzles are linear and the third nozzles are arranged radially, and the third nozzles are connected to the injection channel.

[0006] The beneficial effects of the present invention are as follows: the plasma nozzle provided by the present invention is installed at one end of the plasma spray gun that sprays plasma, the plasma generated by the spray gun enters the spray channel of the plasma nozzle from the first nozzle, and is sprayed to the outside through the second nozzle and the third nozzle to form a plasma flame, and the inner peripheral wall of the spray channel is tapered so that the energy of the plasma generated by the plasma spray gun is increasingly concentrated when flowing to the second nozzle and the third nozzle, and is fully released from the second nozzle and the third nozzle to increase the length and temperature of the plasma flame. The plasma nozzle can generate a plasma flame with a length of 30 to 40 mm, and the instantaneous temperature of the plasma flame can reach more than 200°C to reach the temperature required for processing metal products, and can process metal products of various sizes, with strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic structural diagram of a plasma nozzle according to Embodiment 1 of the present invention;

[0008] Figure 2 It is a structural schematic diagram of the plasma nozzle of the first embodiment of the present invention from another perspective;

[0009] Figure 3 is a cross-sectional view of a plasma nozzle according to Embodiment 1 of the present invention;

[0010] Figure 4 It is a front view of a plasma nozzle according to the first embodiment of the present invention;

[0011] Figure 5 It is a rear view of the plasma nozzle of the first embodiment of the present invention;

[0012] Figure 6 This is a curve diagram of the width of the third nozzle of the plasma nozzle according to the first embodiment of the present invention and the length / temperature of the plasma flame.

[0013] Description of labels:

[0014] 1. Nozzle body; 2. First nozzle; 3. Second nozzle; 4. Injection channel; 5. Third nozzle; 51. First side wall; 6. Threaded portion; 7. Notch. DETAILED DESCRIPTION

[0015] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0016] Please refer to Figures 1 to 5A plasma nozzle comprises a nozzle body 1, wherein a first nozzle 2 and a second nozzle 3 are respectively disposed at opposite ends of the nozzle body 1, wherein the first nozzle 2 and the second nozzle 3 are respectively circular and the diameter of the first nozzle 2 is larger than the diameter of the second nozzle 3, wherein an injection channel 4 connecting the first nozzle 2 and the second nozzle 3 is disposed in the nozzle body 1, wherein the inner peripheral wall of the injection channel 4 is conical, and a plurality of third nozzles 5 are further disposed at one end of the nozzle body 1 having the second nozzle 3, wherein the third nozzles 5 are linear and radially arranged, and the third nozzles 5 are connected to the injection channel 4.

[0017] The structural principle of the present invention is briefly described as follows: a plasma nozzle comprises a nozzle body 1, and a first nozzle 2 connected to a plasma spray gun and a second nozzle 3 for ejecting plasma are respectively arranged at two ends of the nozzle body 1, the first nozzle 2 and the second nozzle 3 are both circular and the diameter of the first nozzle 2 is larger than the diameter of the second nozzle 3, a conical injection channel 4 is arranged in the nozzle body 1, and the two ends of the injection channel 4 are respectively connected to the first nozzle 2 and the second nozzle 3, and a plurality of linear third nozzles 5 are also arranged at one end of the nozzle body 1 having the second nozzle 3, and the plurality of third nozzles 5 are radially arranged and connected to the injection channel 4, and the plasma generated by the plasma spray gun enters the nozzle body 1 from the first nozzle 2, and the energy of the plasma is concentrated toward the second nozzle 3 and the third nozzle 5 during the movement of the plasma in the injection channel 4 and is ejected from the second nozzle 3 and the third nozzle 5 outside the nozzle body 1, so that the energy of the plasma is more concentrated and released evenly when ejecting, so as to increase the length and temperature of the plasma flame.

[0018] From the above description, it can be seen that the beneficial effects of the present invention are: the plasma nozzle provided by the present invention can generate a plasma flame with a length of 30 to 40 mm, and the instantaneous temperature of the plasma flame can reach above 200°C, reaching the temperature required for processing metal products, and can process metal products of various sizes, with strong versatility.

[0019] Furthermore, the number of the third nozzles 5 is twelve, and the twelve third nozzles 5 are arranged at equal intervals.

[0020] Furthermore, the width of the third nozzle 5 is 0.5 mm.

[0021] From the above description, it can be seen that the twelve third nozzles 5 are arranged radially at equal intervals so that the plasma flame is evenly ejected from the second nozzle 3 and the third nozzle 5 after being fully ionized. At the same time, multiple third nozzles 5 for plasma ejection are provided to avoid insufficient plasma release due to the small size of the second nozzle 3 and the third nozzle 5.

[0022] Furthermore, the side wall of the third nozzle 5 away from the injection channel 4 is a first side wall 51, and the distance between the end of the first side wall 51 close to the first nozzle 2 and the axis of the injection channel 4 is greater than the distance between the end of the first side wall 51 close to the second nozzle 3 and the axis of the injection channel 4.

[0023] It can be seen from the above description that the inclined arrangement of the first side wall 51 of the third nozzle 5 is beneficial to further concentrate the plasma and increase the length and temperature of the plasma flame.

[0024] Furthermore, the diameter of the first nozzle 2 is 15 mm.

[0025] Furthermore, the diameter of the second nozzle 3 is 3 mm.

[0026] Furthermore, a threaded portion 6 is provided on the outer peripheral wall of the nozzle body 1 , and the threaded portion 6 is arranged around the first nozzle 2 .

[0027] As can be seen from the above description, the threaded portion 6 provided on the nozzle body 1 is used to connect the plasma nozzle and the plasma spray gun, so that the plasma nozzle and the plasma spray gun are tightly connected to prevent plasma from leaking from the gap between the plasma nozzle and the plasma spray gun.

[0028] Furthermore, a concave notch 7 is provided on the outer peripheral wall of the nozzle body 1 .

[0029] Furthermore, the notch 7 is a plane with a length of 22 mm and a width of 12 mm.

[0030] As can be seen from the above description, the notch 7 provided on the nozzle body 1 is convenient for using a wrench or calipers to rotate the nozzle body 1 so that the plasma nozzle is stably connected to the plasma spray gun, or to conveniently remove the plasma nozzle from the plasma spray gun.

[0031] Furthermore, the nozzle body 1 is made of stainless steel.

[0032] From the above description, it can be seen that the plasma nozzle is made of stainless steel, which makes the structure of the plasma nozzle stable, improves the high temperature resistance and corrosion resistance of the plasma nozzle, facilitates the plasma nozzle to work in a high temperature environment for a long time, and prolongs its service life.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 5 Embodiment 1 of the present invention is: a plasma nozzle, installed at one end of a plasma jet for ejecting plasma, used to concentrate the plasma flowing through the plasma nozzle and then eject it, generating a plasma flame with a length of 30 to 40 mm and a temperature greater than 200°C, so as to meet the high temperature treatment requirements of metal products of various sizes.

[0035] like Figure 1 and Figure 2 As shown, the plasma nozzle comprises a nozzle body 1, and the first nozzle 2 and the second nozzle 3 are respectively provided at opposite ends of the nozzle body 1, and an injection channel 4 connecting the first nozzle 2 and the second nozzle 3 is provided in the nozzle body 1, and the first nozzle 2 and the second nozzle 3 are both circular, and the diameter of the first nozzle 2 is larger than the diameter of the second nozzle 3, so that the inner peripheral wall of the injection channel 4 connecting the first nozzle 2 and the second nozzle 3 is tapered. The end of the nozzle body 1 having the second nozzle 3 is also provided with a plurality of third nozzles 5, and the third nozzles 5 are linear and the plurality of third nozzles 5 are arranged radially around the first nozzle 2, and the third nozzles 5 are connected with the injection channel 4.

[0036] Specifically, the first nozzle 2 is used to communicate with a plasma spray gun, and the plasma generated by the plasma spray gun enters the injection channel 4 through the first nozzle 2. During the process of the plasma moving along the injection channel 4 toward the second nozzle 3 and the third nozzle 5, since the inner circumferential wall of the injection channel 4 is conical, the plasma gradually concentrates toward the second nozzle 3 and the third nozzle 5 and is ejected from the second nozzle 3 and the third nozzle 5 to the outside of the nozzle body 1, thereby generating a plasma flame.

[0037] Optionally, a threaded portion 6 is provided on the outer peripheral wall of the nozzle body 1, and the threaded portion 6 is arranged at the end of the nozzle body 1 and is arranged around the first nozzle 2. The threaded portion 6 is used to fix with the plasma spray gun, and at the same time, the connection between the nozzle body 1 and the plasma spray gun is sealed to prevent plasma leakage from the connection between the nozzle body 1 and the plasma spray gun. A concave notch 7 is also provided on the outer peripheral wall of the nozzle body 1, and the notch 7 is located in the middle of the nozzle body 1. The number of the notches 7 is two and the two notches 7 are arranged opposite to each other. The notch 7 is provided for a wrench or caliper to clamp the nozzle body 1 and rotate the nozzle body 1, so as to facilitate the installation of the nozzle body 1 on the plasma spray gun or the removal of the nozzle body 1 from the plasma spray gun. The notch 7 is preferably a plane with a length of 22 mm and a width of 12 mm, so that the wrench or caliper can stably clamp the nozzle body 1.

[0038] Preferably, the plasma nozzle is made of stainless steel, so that the plasma nozzle has good high temperature resistance and corrosion resistance, which is beneficial to improving the structural stability of the plasma nozzle and enables the plasma nozzle to work in a high temperature environment for a long time.

[0039] like Figure 3As shown, the side wall of the third nozzle 5 away from the injection channel 4 is the first side wall 51, and the distance between the end of the first side wall 51 close to the first nozzle 2 and the axis of the injection channel 4 is greater than the distance between the end of the first side wall 51 close to the second nozzle 3 and the axis of the injection channel 4, that is, the first side wall 51 is inclined relative to the axis of the injection channel 4, so that the plasma moves toward the direction close to the second nozzle 3 under the guidance of the first side wall 51, which is conducive to further concentrating the plasma to the second nozzle 3.

[0040] Please combine Figure 4 and Figure 5 The number of the third nozzles 5 is twelve. The twelve third nozzles 5 are evenly spaced in the circumferential direction of the second nozzle 3 and are respectively connected to the second nozzle 3. The evenly distributed third nozzles 5 can make the plasma flame fully ionized and then evenly ejected from the second nozzle 3 and the third nozzle 5. At the same time, setting a plurality of the third nozzles 5 can avoid insufficient plasma release due to the small size of the second nozzle 3 and the third nozzle 5.

[0041] In this embodiment, the diameter of the first nozzle 2 is 15 mm to ensure that the first nozzle 2 is connected to the plasma spray gun. The diameter of the second nozzle 3 is 3 mm, so that the density of the plasma ejected by the plasma nozzle and the length and temperature of the plasma flame meet the use requirements. If the diameter of the second nozzle 3 is too large, the gas output in the second nozzle 3 is too large, so that the plasma is blown away, thereby reducing the plasma density and shortening the plasma flame; if the diameter of the second nozzle 3 is too small, the amount of plasma ejected is also reduced, resulting in a reduction in the length of the plasma flame, which cannot meet the use requirements of metal products of certain sizes.

[0042] like Figure 6 As shown, the width of the third nozzle 5 is 0.5 mm, so as to ensure that the plasma nozzle can generate a plasma flame of 30 to 40 mm in length and reach a processing temperature of more than 200°C. Figure 6 It can be seen from the curve shown that when the width of the third nozzle 5 is less than 0.5 mm, the length of the plasma flame is short and unstable, and the amount of plasma ejected is small due to the narrow diameter of the third nozzle 5, resulting in a low temperature angle of the generated plasma flame that cannot meet the processing requirements of metal products; when the diameter of the third nozzle 5 is greater than 0.5 mm, the amount of plasma ejected increases, and the gas in the plasma spray gun drives the incompletely ionized gas to be ejected from the third nozzle 5 due to the pressure difference, so that the plasma is dispersed and the density of the plasma is reduced, which leads to a reduction in the length of the plasma flame and the temperature cannot meet the requirements, which is not conducive to the processing of metal products.

[0043] In summary, the plasma nozzle provided by the present invention is easy to disassemble and assemble, can generate plasma flames that meet the requirements for metal product processing, and can perform surface treatment on metal products of various sizes. It has good versatility, good high temperature resistance and corrosion resistance, and a long service life.

[0044] 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 specification 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, comprising a nozzle body, characterized in that: The nozzle body is provided with a first nozzle and a second nozzle at opposite ends, respectively. The first nozzle and the second nozzle are circular and the diameter of the first nozzle is larger than the diameter of the second nozzle. The nozzle body is provided with an injection channel connecting the first nozzle and the second nozzle, and the inner circumferential wall of the injection channel is conical. The nozzle body is further provided with a plurality of third nozzles at one end having the second nozzle. The third nozzles are linear and radially arranged, and the third nozzles are connected to the injection channel.

2. The plasma nozzle according to claim 1, characterized in that: The number of the third nozzles is twelve, and the twelve third nozzles are arranged at equal intervals.

3. The plasma nozzle according to claim 1, characterized in that: The width of the third nozzle is 0.5 mm.

4. The plasma nozzle according to claim 1, characterized in that: The side wall of the third nozzle away from the injection channel is a first side wall, and the distance between the end of the first side wall close to the first nozzle and the axis of the injection channel is greater than the distance between the end of the first side wall close to the second nozzle and the axis of the injection channel.

5. The plasma nozzle according to claim 1, characterized in that: The diameter of the first nozzle is 15 mm.

6. The plasma nozzle according to claim 1, characterized in that: The diameter of the second nozzle is 3 mm.

7. The plasma nozzle according to claim 1, characterized in that: A threaded portion is provided on the outer peripheral wall of the nozzle body, and the threaded portion is arranged around the first nozzle.

8. The plasma nozzle according to claim 1, characterized in that: An inwardly concave notch is arranged on the outer peripheral wall of the nozzle body.

9. The plasma nozzle according to claim 8, characterized in that: The notch is a plane with a length of 22 mm and a width of 12 mm.

10. The plasma nozzle according to claim 1, characterized in that: The nozzle body is made of stainless steel.

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