Plasma spray gun and cleaning device

Abstract

The present application discloses a plasma spray gun and a cleaning device. The plasma spray gun includes: a gun body, a guide part, and a nozzle. The gun body has an air inlet and an outlet, and the gun body forms an ionization zone between the air inlet and the outlet; the guide part is arranged inside the gun body and is located between the air inlet and the ionization zone, and the guide part forms a plurality of spiral guide channels; the nozzle is arranged on the gun body, and the nozzle forms an injection channel, and the injection channel is connected to the outlet. After the gas passes through the guide channel, the flow direction of the gas can be ordered to stabilize the gas flow, so that the gas passing through the ionization zone is ionized more fully, so as to improve the surface treatment effect.

Description

Technical Field

[0001] The present application relates to the technical field of plasma generating equipment, and in particular to a plasma spray gun and a cleaning device. Background Art

[0002] Some products need to be surface treated during the production process, for example, cleaning, spraying or etching the surface of the product; in order to achieve a better treatment effect and reduce damage to the product, a plasma spray gun can be used to treat the surface of the product. The inside of the spray gun is connected to the gas source to allow gas to enter. The electrodes inside the spray gun can ionize the gas to form plasma, and then the spray gun sprays the plasma onto the surface of the product to treat the surface of the product. In the related art, the inside of the spray gun is straight, and the airflow is prone to form turbulence, resulting in insufficient ionization and affecting the treatment effect. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a plasma spray gun that can make the gas flow in an orderly and stable manner, thereby achieving sufficient ionization to improve the treatment effect.

[0004] The present application also provides a cleaning device having the above-mentioned plasma spray gun.

[0005] The plasma spray gun according to the first aspect of the present application includes: a gun body, a flow guide portion, and a spray head.

[0006] The gun body has an air inlet and an outlet, and the gun body forms an ionization zone between the air inlet and the outlet; the air inlet is used to connect to a gas source, the ionization zone is used to ionize the gas entering the gun body to form plasma, and the outlet is used to eject the plasma;

[0007] The guide part is arranged inside the gun body and is located between the air inlet and the ionization zone. The guide part is formed with a plurality of spiral guide channels, and the plurality of guide channels are distributed along the circumferential direction. The guide channels communicate the air inlet and the ionization zone.

[0008] The nozzle is arranged on the gun body, and a spray channel is formed on the nozzle, and the spray channel is communicated with the outlet.

[0009] The plasma spray gun according to the first aspect of the present application has at least the following beneficial effects: after the gas passes through the flow guide channel, a vortex can be formed to stabilize the gas flow, so that the gas passing through the ionization zone is more fully ionized to improve the surface treatment effect. In addition, the gun body is driven to rotate by the rotating mechanism, and the rotation direction of the gun body is consistent with the rotation direction of the gas when passing through the flow guide channel. When the gun body rotates, the orderliness of the gas flow can be further improved to further improve the surface treatment effect.

[0010] According to some embodiments of the present application, a rotating mechanism is further included, which drives and connects the gun body to make the gun body rotate, wherein the rotation direction of the gun body is consistent with the rotation direction of the gas when passing through the guide channel.

[0011] According to some embodiments of the present application, the guide channel is formed inside the guide portion.

[0012] According to some embodiments of the present application, an end of the guide portion close to the ionization zone forms a flared structure, and the guide channel is connected to an end of the flared structure with a smaller inner diameter.

[0013] According to some embodiments of the present application, the outer peripheral surface of the guide portion forms a guide channel, and the inner wall of the gun body constitutes a partial wall surface of the guide channel.

[0014] According to some embodiments of the present application, a protrusion is provided on the side of the guide portion facing the outlet, and the outer diameter of the protrusion gradually decreases along the direction from the air inlet to the outlet, and the inner wall of the gun body forms a first shrinkage structure corresponding to the position of the protrusion.

[0015] According to some embodiments of the present application, at least two guide plates are further included, each having a guide hole formed thereon. The guide plate is disposed inside the gun body and is located between the air inlet and the guide portion. Among two adjacent guide plates, the aperture of the guide hole on the guide plate close to the air inlet is larger than the aperture of the guide hole on the guide plate close to the outlet.

[0016] According to some embodiments of the present application, in two adjacent guide plates, the number of the guide holes on the guide plate close to the air inlet is less than the number of the guide holes on the guide plate close to the outlet.

[0017] According to some embodiments of the present application, the injection channel is arranged at an angle.

[0018] According to some embodiments of the present application, a counterweight groove is formed on the nozzle, and the counterweight groove and the injection channel are distributed on both sides of the nozzle to balance the nozzle.

[0019] According to some embodiments of the present application, along the injection direction of the injection channel, the inner diameter of the injection channel gradually decreases.

[0020] The cleaning device according to the second embodiment of the present application includes the plasma spray gun according to the first embodiment.

[0021] The cleaning device according to the second aspect of the present application has at least the following beneficial effects: the plasma spray gun of the first aspect is used to clean the surface of the product, thereby improving the cleaning effect on the surface of the product.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 A cross-sectional view of a plasma spray gun according to an embodiment of the first aspect of the present application;

[0025] Figure 2 for Figure 1 A three-dimensional diagram of the middle guide part;

[0026] Figure 3 for Figure 2 A cross-sectional view of the middle guide portion;

[0027] Figure 4 for Figure 1 A three-dimensional diagram of the middle nozzle;

[0028] Figure 5 for Figure 4 A cross-sectional view of the middle nozzle;

[0029] Figure 6 A cross-sectional view of a plasma spray gun according to another embodiment of the present application;

[0030] Figure 7 for Figure 6 Schematic diagram of the connection between the middle guide part, the guide plate and the gun body.

[0031] Reference numerals:

[0032] Gun body 100, air inlet 110, outlet 120, ionization zone 130, first constriction structure 140, annular channel 150; second constriction structure 160;

[0033] The guide part 200, the guide channel 210, the protrusion 220; the expansion structure 230;

[0034] The nozzle 300, the weight-balancing groove 310, the first groove 311, the second groove 312; the weight-reducing groove 320; the injection channel 330, the plasma inlet 331, the nozzle 332;

[0035] Rotating mechanism 400;

[0036] The guide plate 500 and the guide hole 510 . DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0038] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0041] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 According to the first aspect of the present application, the plasma spray gun includes: a gun body 100, a flow guide portion 200, and a spray head 300.

[0043] The gun body 100 has an air inlet 110 and an outlet 120, and the gun body 100 forms an ionization zone 130 between the air inlet 110 and the outlet 120; the air inlet 110 is used to connect with a gas source, the ionization zone 130 is used to ionize the gas entering the gun body 100 to form plasma, and the outlet 120 is used to eject the plasma. Specifically, the gas source can supply gas to the inside of the gun body 100 through the air inlet 110, for example, injecting an inert gas such as helium into the inside of the gun body 100; and, the gun body 100 is provided with a positive electrode and a negative electrode at a position corresponding to the ionization zone 130, and an arc is formed in the ionization zone 130 by the positive electrode and the negative electrode, so that the gas passing through the ionization zone 130 is ionized to form plasma.

[0044] The guide part 200 is arranged inside the gun body 100 and is located between the air inlet 110 and the ionization zone 130. Specifically, the guide part 200 can be formed integrally with the gun body 100 or can be arranged separately. The guide part 200 is formed with a plurality of spiral guide channels 210, and the plurality of guide channels 210 are distributed along the circumferential direction. The guide channels 210 connect the air inlet 110 and the ionization zone 130. Specifically, along the direction from the air inlet 110 to the outlet 120, the guide channel 210 spirals with the axis of the guide part 200 as the center of rotation, and the plurality of guide channels 210 are distributed along the circumferential direction with the axis of the guide part 200 as the center of the circle. It should be understood that since the guide channel 210 is spiral, the gas flowing through the guide channel 210 will rotate along the spiral direction of the guide channel 210 while flowing toward the ionization zone 130.

[0045] The spray head 300 is disposed on the gun body 100, and a spray channel 330 is formed on the spray head 300, and the spray channel 330 is communicated with the outlet 120. Specifically, the spray channel 330 is used to spray plasma onto the surface of the product, so as to perform surface treatment on the product by plasma.

[0046] It is understandable that after the gas passes through the guide channel 210, the flow direction of the gas can become orderly, for example, the gas forms a vortex to stabilize the gas flow, thereby making the gas passing through the ionization zone 130 more fully ionized, making the ionization process more complete, thereby improving the surface treatment effect.

[0047] In order to further improve the orderliness of the gas flow, the plasma spray gun further includes a rotating mechanism 400 , which drives the gun body 100 to rotate, wherein the rotation direction of the gun body 100 is consistent with the rotation direction of the gas when passing through the guide channel 210 .

[0048] It can be understood that the gun body 100 is driven to rotate by the rotating mechanism 400, and the rotation direction of the gun body 100 is made consistent with the rotation direction of the gas when passing through the guide channel 210. When the gun body 100 rotates, the orderliness of the gas flow can be further enhanced, that is, the eddy current can be further enhanced to further make the ionization process more complete, thereby improving the surface treatment effect.

[0049] In order to make the rotation direction of the gun body 100 consistent with the rotation direction of the gas when passing through the guide channel 210, the spiral direction of the guide channel 210 can be made consistent with the rotation direction of the gun body 100. For example, the direction along the outlet 120 toward the gas inlet 110 is the main view direction of the plasma spray gun of the present application. From the perspective of the main view, the spiral guide channel 210 is bent in a spiral in a clockwise direction. Therefore, the gas rotates clockwise when passing through the guide channel 210, and the gas flowing out of the guide channel 210 will form a vortex rotating in the clockwise direction. The rotating mechanism 400 drives the gun body 100 to rotate in the clockwise direction to enhance the vortex.

[0050] It can also be understood that, in order to increase the processing area of ​​the nozzle 300, the injection channel 330 of the nozzle 300 is tilted so that the nozzle 332 of the injection channel 330 deviates from the axis of the nozzle 300, and the rotation mechanism 400 can drive the gun body 100 to rotate. When the gun body 100 rotates, the nozzle 300 can rotate along its axis, thereby increasing the injection range of the nozzle 300 and increasing the processing area. In some other embodiments, the injection channel 330 can also be opened in the middle of the nozzle 300 and parallel to the axis of the nozzle 300.

[0051] Regarding the formation of the guide channel 210, the present application includes at least the following two methods:

[0052] The first method of forming the guide channel 210 is as follows: Figure 1 and Figure 2 A flow guiding channel 210 is formed inside the flow guiding portion 200 .

[0053] For example, the guide channel 210 passes through the guide portion 200 and is open at both ends to connect the air inlet 110 and the ionization zone 130 .

[0054] Specifically, in order to further increase the strength of the eddy current, refer to Figure 3 An end of the guide portion 200 close to the ionization zone 130 forms a flared structure 230 , and the guide channel 210 is connected to an end of the flared structure 230 with a smaller inner diameter.

[0055] It is understandable that the inner diameter of the expansion structure 230 gradually increases from the air inlet 110 to the outlet 120. Also, the bottom wall of the expansion structure 230 forms a guide channel 210. After the gas passing through the guide channel 210 forms a vortex, the gas rotates along the inner wall of the expansion structure 230, and the vortex is further enhanced by the expansion structure 230.

[0056] The second method of forming the guide channel 210 is as follows: Figure 6 and Figure 7 The outer peripheral surface of the guide portion 200 forms a guide channel 210 , and the inner wall of the gun body 100 constitutes a partial wall surface of the guide channel 210 .

[0057] For example, a through groove is formed on the outer circumferential surface of the guide part 200 , and the through groove runs through both ends of the guide part 200 . The groove wall of the through groove and the inner wall of the gun body 100 form a guide channel 210 .

[0058] To increase the air pressure, refer to Figure 6 and Figure 7 A protrusion 220 is provided on one side of the guide portion 200 facing the outlet 120 , and the outer diameter of the protrusion 220 gradually decreases along the direction from the air inlet 110 to the outlet 120 , and a first shrinkage structure 140 is formed on the inner wall of the gun body 100 corresponding to the position of the protrusion 220 .

[0059] It should be noted that, along the direction from the air inlet 110 to the outlet 120 , the inner diameter of the first constricted structure 140 gradually decreases.

[0060] It is understandable that, by providing the protrusion 220, an annular channel 150 is formed between the protrusion 220 and the inner wall of the gun body 100, so that the gas after passing through the guide channel 210 flows toward the outlet 120 and rotates around the outer side of the protrusion 220, so that the gas flow is orderly and stable. In addition, since the outer diameter of the protrusion 220 gradually decreases and the inner wall of the gun body 100 is provided with a first constriction structure 140 corresponding to the protrusion 220, the size of the annular channel 150 is gradually reduced, the gas is gradually concentrated, the gas pressure is increased, and the flow rate is increased, the surface treatment effect is improved, and the gas temperature can be reduced, so that the temperature of the ejected plasma is low and it is not easy to damage the product.

[0061] Specifically, an annular channel 150 is formed between the protrusion 220 and the inner wall of the gun body 100, and the guide channel 210 is connected to the ionization zone 130 through the annular channel 150. The reduction range of the outer diameter of the protrusion 220 is the same as the reduction range of the inner wall of the gun body 100, so that the difference between the inner diameter and the outer diameter of the annular channel 150 remains unchanged, so that the gas flow is stable.

[0062] To further increase the pressure of plasma during ejection, a second constriction structure 160 can be formed between the ionization zone 130 and the outlet 120 of the gun body 100 . After the ionization zone 130 is ionized to form plasma, the plasma is further pressurized by the second constriction structure 160 .

[0063] For further pressure boost, refer to Figure 7 The plasma spray gun further includes at least two guide plates 500, on which guide holes 510 are formed. The guide plates 500 are arranged inside the gun body 100 and between the air inlet 110 and the guide portion 200. Among two adjacent guide plates 500, the aperture of the guide hole 510 on the guide plate 500 close to the air inlet 110 is larger than the aperture of the guide hole 510 on the guide plate 500 close to the outlet 120.

[0064] It can be understood that, along the direction from the air inlet 110 to the outlet 120, the aperture of the guide holes 510 on the two adjacent guide plates 500 decreases, and along the direction from the air inlet 110 to the outlet 120, that is, along the flow direction of the gas, by reducing the aperture of the guide holes 510 on the guide plates 500, that is, among the two adjacent guide plates 500, the aperture of the guide holes 510 on the guide plate 500 close to the outlet 120 is smaller than the aperture of the guide holes 510 on the guide plate 500 close to the air inlet 110, so that the gas passing through multiple guide plates 500 can be pressurized.

[0065] For example, in this embodiment, there are two guide plates 500. In other embodiments, the number of guide plates 500 may be more than two, which is not limited here.

[0066] Specifically, in order to improve the supercharging effect of the guide plate 500 , the guide holes 510 on two adjacent guide plates 500 may be staggered with each other.

[0067] In addition, in order to prevent the flow guide hole 510 from being too small to affect the normal flow of gas, refer to Figure 7 In two adjacent guide plates 500 , the number of guide holes 510 on the guide plate 500 close to the air inlet 110 is less than the number of guide holes 510 on the guide plate 500 close to the outlet 120 .

[0068] It is understandable that the number of guide holes 510 on two adjacent guide plates 500 gradually increases along the direction from the air inlet 110 to the outlet 120. The number of guide holes 510 on the guide plate 500 close to the outlet 120 is increased to ensure that the gas can flow normally.

[0069] It should be noted that when the rotating mechanism 400 drives the gun body 100 to rotate, the nozzle 300 rotates with its axis as the rotation center. Since the injection channel 330 is inclined, the center of gravity of the nozzle 300 will deviate from the axis of the nozzle 300. In order to avoid instability when the nozzle 300 rotates, refer to Figure 4 and Figure 5 A counterweight groove 310 is formed on the nozzle 300 , and the counterweight groove 310 and the injection channel 330 are distributed on both sides of the nozzle 300 to balance the nozzle 300 .

[0070] It is understandable that the counterweight groove 310 and the injection channel 330 are distributed on both sides of the symmetry plane of the nozzle 300. By setting the counterweight groove 310, the center of gravity of the nozzle 300 is located on or close to its axis, so that the nozzle 300 can rotate stably.

[0071] It should be noted that the counterweight groove 310 may include multiple types. For example, the counterweight groove 310 includes a first groove 311 and a second groove 312, wherein the first groove 311 is arc-shaped and curved with the axis of the nozzle 300 as the center; the second groove 312 includes multiple types and is distributed at the bottom of the nozzle 300 along the circumferential direction with the axis of the nozzle 300 as the center.

[0072] Specifically, the counterweight groove 310 is disposed at the bottom of the nozzle 300 . In other embodiments, the counterweight groove 310 may also be formed inside and around the nozzle 300 .

[0073] In order to further reduce the weight of the nozzle 300, the nozzle 300 can also be provided with a weight-reducing groove 320. For example, the weight-reducing groove 320 is provided at the center of the bottom of the nozzle 300. For another example, the weight-reducing groove 320 and the counterweight groove 310 are distributed on both sides of the center line of the nozzle 300. That is, the weight-reducing groove 320 and the counterweight groove 310 are distributed at the bottom of the nozzle 300 along the circumferential direction with the axis of the nozzle 300 as a circle. Then, the depth of the weight-reducing groove 320 and the counterweight groove 310 is controlled to balance the nozzle 300.

[0074] In order to make the ejected plasma more concentrated, refer to Figure 5 , along the injection direction of the injection channel 330 , the inner diameter of the injection channel 330 gradually decreases.

[0075] It can be understood that the injection channel 330 runs through both ends of the nozzle 300 to form a plasma inlet 331 and a nozzle 332 on the nozzle 300. The plasma inlet 331 is connected to the outlet 120, and the nozzle 332 is used to eject the plasma. Along the injection direction of the injection channel 330, that is, along the direction from the plasma inlet 331 to the nozzle 332, the inner diameter of the injection channel 330 gradually decreases, thereby increasing the pressure of the plasma when it is ejected, increasing the plasma flow speed, and being able to make the plasma more concentrated when ejected, thereby improving the surface treatment effect of the plasma.

[0076] The cleaning device according to the second embodiment of the present application includes the plasma spray gun according to the first embodiment.

[0077] The cleaning device according to the second aspect of the present application has at least the following beneficial effects: the plasma spray gun of the first aspect is used to clean the surface of the product, thereby improving the cleaning effect on the surface of the product.

[0078] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A plasma spray gun, characterized in that: include: A gun body (100) has an air inlet (110) and an outlet (120), and the gun body (100) forms an ionization zone (130) between the air inlet (110) and the outlet (120); the air inlet (110) is used to connect to a gas source, the ionization zone (130) is used to ionize the gas entering the gun body (100) to form plasma, and the outlet (120) is used to eject the plasma; A guide portion (200) is arranged inside the gun body (100) and is located between the air inlet (110) and the ionization zone (130); the guide portion (200) is formed with a plurality of spiral guide channels (210), and the plurality of guide channels (210) are distributed along a circumferential direction; the guide channels (210) are connected with the air inlet (110) and the ionization zone (130); A spray head (300) is disposed on the gun body (100), and a spray channel (330) is formed on the spray head (300), and the spray channel (330) is communicated with the outlet (120).

2. The plasma spray gun according to claim 1, characterized in that It also includes a rotating mechanism (400) that is driven and connected to the gun body (100) and is used to make the gun body (100) rotate, wherein the rotation direction of the gun body (100) is consistent with the rotation direction of the gas when passing through the guide channel (210).

3. The plasma spray gun according to claim 1, characterized in that: The flow guiding channel (210) is formed inside the flow guiding portion (200).

4. The plasma spray gun according to claim 3, characterized in that An end of the guide portion (200) close to the ionization zone (130) forms a flared structure (230), and the guide channel (210) is connected to an end of the flared structure (230) with a smaller inner diameter.

5. The plasma spray gun according to claim 1, characterized in that: The outer peripheral surface of the flow guide portion (200) forms a flow guide channel (210), and the inner wall of the gun body (100) constitutes a partial wall surface of the flow guide channel (210).

6. The plasma spray gun according to claim 1, characterized in that A protrusion (220) is provided on one side of the guide portion (200) facing the outlet (120), and the outer diameter of the protrusion (220) gradually decreases along the direction from the air inlet (110) to the outlet (120), and a first shrinkage structure (140) is formed on the inner wall of the gun body (100) corresponding to the position of the protrusion (220).

7. The plasma spray gun according to claim 1, characterized in that: The invention also comprises at least two guide plates (500), each of which is formed with a guide hole (510). The guide plate (500) is arranged inside the gun body (100) and is located between the air inlet (110) and the guide portion (200). Among the two adjacent guide plates (500), the diameter of the guide hole (510) on the guide plate (500) close to the air inlet (110) is larger than the diameter of the guide hole (510) on the guide plate (500) close to the outlet (120).

8. The plasma spray gun according to any one of claims 1 to 7, characterized in that Along the injection direction of the injection channel (330), the inner diameter of the injection channel (330) gradually decreases.

9. The plasma spray gun according to any one of claims 1 to 7, characterized in that The injection channel (330) is arranged obliquely.

10. The plasma spray gun according to claim 9, characterized in that A counterweight groove (310) is formed on the nozzle (300), and the counterweight groove (310) and the injection channel (330) are distributed on both sides of the nozzle (300) to balance the nozzle (300).

11. A cleaning device, characterized in that: A plasma spray gun comprising the plasma spray gun according to any one of claims 1 to 10.

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