Spray gun of rotary plasma cleaning machine

Abstract

The utility model discloses a rotary plasma cleaning machine spray gun which comprises a driving assembly and a nozzle, the driving assembly is connected with the nozzle, the driving assembly can drive the nozzle to rotate, the nozzle comprises a C end close to the driving assembly and a D end far away from the driving assembly, and the rotary plasma cleaning machine spray gun further comprises an eccentric channel, one end of the eccentric channel is arranged at the end C, the other end of the eccentric channel extends towards the end D, and the center line of the eccentric channel is a straight line and does not coincide with the center line of the nozzle. Only the eccentric channel is arranged, the center line of the eccentric channel is a straight line, and no bent interior exists in the eccentric channel, so that the problems that the bent inner wall in a traditional channel can form certain resistance to the airflow, the air pressure is reduced when the high-pressure airflow is ejected, the ejection distance of the ion gas is shortened, and the injection efficiency is improved are solved. And the treatment effect of the plasma cleaning spray head on the surface of the workpiece is affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of plasma cleaning machines, and in particular relates to a rotating plasma cleaning machine spray gun. Background Art

[0002] Plasma cleaner, also called plasma cleaning machine or plasma surface treatment instrument, is a new high-tech technology that uses plasma to achieve effects that conventional cleaning methods cannot achieve. Plasma is a state of matter, also called the fourth state of matter, and does not belong to the common three states of solid, liquid and gas. Applying enough energy to the gas to ionize it will become a plasma state. The "active" components of plasma include: ions, electrons, atoms, active groups, excited nuclides (metastable state), photons, etc. Plasma cleaners use the properties of these active components to treat the sample surface, thereby achieving the purpose of cleaning, coating, etc.

[0003] In order to have a larger processing area when processing the workpiece surface, the utility model patent with publication number CN219356589U designs the nozzle into a rotatable structure, and through a specific air inlet channel and an eccentric channel set in the nozzle, but the curved inner wall at the connection of the two channels will form a certain resistance to the airflow, causing the high-pressure airflow to reduce its pressure when it is ejected, resulting in a shortened injection distance of the ion gas, affecting the treatment effect of the plasma cleaning nozzle on the workpiece surface. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the utility model is to provide a rotary plasma cleaning machine spray gun, in which the center line of the eccentric channel is a straight line without any bends, thereby solving the technical problem in the technical background that the curved inner wall at the connection of the two channels will form a certain resistance to the airflow.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a rotary plasma cleaning machine spray gun, including a drive assembly and a nozzle, the drive assembly is connected to the nozzle, and the drive assembly can drive the nozzle to rotate, the nozzle includes a C end close to the drive assembly, and a D end away from the drive assembly, and also includes an eccentric channel, one end of the eccentric channel is arranged at the C end, and the other end extends to the D end, the center line of the eccentric channel is a straight line, and the center line of the eccentric channel and the center line of the nozzle do not coincide.

[0006] Furthermore, a center line of the eccentric channel and a center line of the nozzle form a nozzle angle, and the range of the nozzle angle is 15 to 75 degrees.

[0007] Furthermore, the nozzle further comprises an airflow nozzle hole, wherein the airflow nozzle hole is located at the D end and is connected to the eccentric channel, and a center line of the airflow nozzle hole coincides with a center line of the eccentric channel.

[0008] Furthermore, it also includes an air inlet pipe, which is connected to the driving assembly. The air inlet pipe is a curved pipe, and its bending angle is not greater than 120°, preferably 90°.

[0009] Furthermore, it also includes a main shaft, a main shaft cavity is arranged inside the main shaft, an axial main shaft cavity is arranged inside the main shaft, the main shaft cavity is connected with the air inlet pipe, an electrode fixing seat is arranged at one end of the main shaft cavity close to the nozzle, a through hole is arranged on the electrode fixing seat, and the through hole and the main shaft are not arranged in parallel.

[0010] Furthermore, the electrode fixing seat includes an electrode fixing plate and an electrode connecting column, one end of the electrode connecting column is connected to the electrode fixing plate, and the other end is connected to the electrode, the side of the electrode fixing plate away from the electrode connecting column is the first side, and the side of the electrode fixing plate close to the electrode connecting column is the second side, the first side and the second side are arranged relatively parallel, and the through hole is arranged between the first side and the second side, the through hole and the first side of the electrode fixing plate are not arranged vertically, and the through hole and the first side of the electrode fixing plate form an angle, and the angle ranges from 15 to 75°, preferably 45°.

[0011] Furthermore, a plurality of through holes are provided, and the plurality of through holes are arranged in a circular array with the center of the electrode fixing plate as the center.

[0012] Furthermore, the number of the through holes is 4 to 6.

[0013] Furthermore, an annular groove is provided on the inner wall of the spindle cavity, and the electrode fixing plate is clamped in the annular groove.

[0014] Furthermore, the driving assembly and the nozzle are connected via a sheath, and the length of the sheath is greater than 110 mm.

[0015] The beneficial effect of the utility model is that only an eccentric channel is provided in the present application, and the center line of the eccentric channel is a straight line, and there is no bent interior in the eccentric channel, thereby solving the technical problem that the bent inner wall in the traditional channel will form a certain resistance to the airflow, causing the air pressure of the high-pressure airflow to decrease when it is ejected, resulting in a shortened injection distance of the ion gas, which affects the treatment effect of the plasma cleaning nozzle on the workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A three-dimensional diagram of a spray gun of a rotary plasma cleaning machine according to an embodiment of the utility model;

[0019] Figure 2 A cross-sectional view of a rotary plasma cleaning machine spray gun according to an embodiment of the utility model;

[0020] Figure 3 A partial cross-sectional view of a rotary plasma cleaning machine spray gun according to an embodiment of the utility model;

[0021] Figure 4 A three-dimensional diagram of an electrode fixing seat according to an embodiment of the utility model;

[0022] Figure 5 A cross-sectional view of an electrode fixing plate according to an embodiment of the utility model;

[0023] Figure 6 A three-dimensional diagram of a nozzle according to an embodiment of the present utility model;

[0024] Figure 7 It is a cross-sectional view of a nozzle according to an embodiment of the present invention.

[0025] In the figure: 1. air inlet pipe; 2. drive assembly; 21. protective shell; 22. bearing fixing seat; 23. bearing; 24. drive shaft; 3. main shaft; 31. first main shaft; 32. second main shaft; 33. third main shaft; 331. first boss; 332. second boss; 34. main shaft cavity; 35. connecting part; 4. electrode fixing seat; 41. electrode fixing plate; 411. first side; 412. second side; 413. through hole; 414. angle; 42. electrode connecting column; 5. electrode; 6. sheath; 7. nozzle; 71. C end; 72. D end; 73. eccentric channel; 731. center line of eccentric channel; 74. air flow nozzle; 75. counterweight hole; 76. weight reduction groove; 77. center line of nozzle; 78. nozzle angle. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] See attached Figure 1 As shown, a rotary plasma cleaning machine spray gun in this embodiment includes a driving assembly 2 and a nozzle 7 connected to the driving assembly 2 through a sheath 6. The driving assembly 2 can drive the nozzle 7 to rotate through the sheath 6.

[0028] See attached Figure 2 As shown, the drive assembly 2 includes a protective shell 21, and bearing fixing seats 22 are arranged at both ends of the protective shell 21. The bearing fixing seats 22 are annular structures, which are sleeved on the bearings 23, and the bearings 23 are sleeved on the drive shaft 24. One end of the drive shaft 24 is arranged in the protective shell 21, and the other end extends toward the nozzle 7, and a part of the area is arranged outside the protective shell 21. The drive shaft 24 extending outside the protective shell 21 is connected to the sheath 6, and the sheath 6 is connected to the nozzle 7. The drive shaft 24 can be connected to the nozzle 7 through the sheath 6 to drive the nozzle 7 to rotate. The electrode 5 is arranged in the sheath 6, and the cavity in the sheath 6 is connected to the eccentric channel 73 of the nozzle 7.

[0029] In some embodiments, an axial driving cavity is provided in the driving shaft 24, and a main shaft 3 is provided in the driving cavity. A connecting portion 35 is provided at the end of the main shaft 3 away from the nozzle 7. The connecting portion 35 is detachably connected to the bearing fixing seat 22 by screws or bolts. The main shaft 3 is fixed by the bearing fixing seat 22 so that the main shaft 3 is located in the driving cavity and is arranged parallel to the axial driving cavity, and does not touch the inner wall of the driving cavity, that is, during the rotation of the driving shaft 24, the main shaft 3 can remain stationary.

[0030] In some embodiments, an axial spindle cavity 34 is provided in the spindle 3, and the spindle cavity 34 is connected to the air inlet pipe 1, and air enters the spindle cavity 34 through the air inlet pipe 1. An electrode fixing seat 4 is provided at one end of the spindle cavity 34 close to the nozzle 7, and one end of the electrode fixing seat 4 is clamped in the spindle cavity 34, and the other end extends toward the nozzle 7 and is connected to the electrode 5 located outside the spindle cavity 34 and inside the sheath 6. Under high pressure, air flows into the vicinity of the electrode 5 through the air inlet pipe 1 and the spindle cavity 34, and is ionized into plasma by the electrode 5, and is ejected from the nozzle 7 to clean the workpiece located below the nozzle 7.

[0031] In some embodiments, the air inlet pipe 1 is not a straight pipe but a curved pipe, and its bending angle is not greater than 120°, preferably 90°. And the bending part of the curved pipe is a rounded corner with a smooth transition to reduce wind resistance. By setting the air inlet pipe 1 as a curved pipe, the required space in the vertical direction can be reduced during the installation process, so as to be suitable for installation in a specific space.

[0032] In some embodiments, see Appendix Figure 3-5 As shown, the electrode fixing seat 4 includes an electrode fixing plate 41 and an electrode connecting column 42, and the direction of the electrode connecting column 42 is arranged parallel to the axial through hole 413. The electrode fixing plate 41 is a circular structure, and the electrode connecting column 42 and the electrode fixing plate 41 are arranged vertically, and the electrode connecting column 42 and the center position of the electrode fixing plate 41 are integrally connected. An annular groove is provided on the inner wall of the spindle cavity 34, and the annular groove in which the electrode fixing plate 41 is clamped is used to fix and support the electrode fixing plate 41 through the spindle 3, thereby fixing and supporting the electrode 5.

[0033] In some embodiments, the side of the electrode fixing plate 41 away from the electrode connecting column 42 is the first side 411, and the side of the electrode fixing plate 41 close to the electrode connecting column 42 is the second side 412. The first side 411 and the second side 412 are arranged in parallel, and a through hole 413 is arranged between the first side 411 and the second side 412. The arrangement of the through hole 413 facilitates the air in the spindle cavity 34 to pass through the through hole 413 to the vicinity of the electrode 5 for ionization.

[0034] In some embodiments, a plurality of through holes 413 are provided, and the plurality of through holes 413 are arranged in a circular array with the center of the electrode fixing plate 41 as the center. Experimental studies have shown that the best effect is achieved when the number of through holes 413 is 4 to 6.

[0035] In some embodiments, the through hole 413 and the first side surface 411 of the electrode fixing plate 41 are not arranged vertically, that is, the through hole 413 and the first side surface 411 of the electrode fixing plate 41 form an angle 414, and the angle 414 ranges from 15 to 75 degrees, preferably 45 degrees. By not arranging the through hole 413 and the electrode fixing plate 41 vertically, when the airflow passes through the through hole 413, the airflow rotates and moves along the through hole 413, so that after the airflow passes through the through hole 413, it can be more evenly dispersed near the electrode 5, and the plasma generated after ionization by the electrode 5 is more evenly distributed.

[0036] In some embodiments, the spindle 3 includes a first spindle 31, a second spindle 32 and a third spindle 33. One end A of the first spindle 31 is connected to the bearing fixing seat 22, and the other end B extends toward the nozzle 7. The diameter of the spindle cavity at the B end is larger than the diameter of the spindle cavity 34 at the A section, and a boss is formed near the B end. A part of the second spindle 32 is arranged inside the first spindle 31, abutting against the inner wall of the first spindle 31, and one end abuts against the boss.

[0037] The diameter of the spindle cavity 34 inside the third spindle 33 gradually decreases and becomes stepped, forming a first boss 331 and a second boss 332 in sequence. The third spindle 33 is sleeved on the other end of the second spindle 32, and the second spindle 32 and the first boss 331 are in contact with each other. The inner wall thickness of the second spindle 32 is greater than the width of the first boss 331, and the second spindle 32 and the second boss 332 form an annular groove for fixing the electrode fixing plate 41. The arrangement of the first spindle 31, the second spindle 32 and the third spindle 33 facilitates the installation of the electrode fixing plate 41. That is, the second spindle 32 is first arranged in the spindle cavity 34 of the first spindle 31, and then the electrode fixing seat 4 is placed at one end of the second spindle 32, and finally the third spindle 33 is sleeved on the second spindle 32 to form an annular groove, and the electrode fixing seat 4 is clamped.

[0038] In some embodiments, in order to allow the nozzle 7 to extend into the gap of the object to be cleaned for cleaning, the length of the sheath 6 is lengthened to increase the distance between the protective shell and the nozzle 7, so that the nozzle 7 can extend into a deeper gap for cleaning. Currently, the commonly used length of the sheath 6 is 110 mm. In this embodiment, the length of the sheath 6 is increased to 170 mm, so that the nozzle 7 can be extended into the gap for deep cleaning. The specific length of the sheath 6 can be adjusted according to the actual gap depth to be cleaned, for example, it can be 150 mm, or 200 mm, which is not limited in this application.

[0039] When the length of the sheath 6 increases, the length of the main shaft 3 will be lengthened accordingly, and the increased length is equal to the increased length of the sheath 6, so as to ensure that the distance between the ionized plasma and the nozzle 7 remains unchanged, thereby ensuring the cleaning effect.

[0040] In some implementations, see Appendix Figure 6-7 As shown, the nozzle 7 is funnel-shaped as a whole, with one end connected to the sheath 6 being the C end 71, and the end away from the sheath 6 being the D end 72. An eccentric channel 73 and an airflow nozzle 74 are provided on the nozzle 7, and the airflow nozzle 74 is provided at the D end 72. One end of the eccentric channel 73 is provided at the C end 71 and extends toward the D end 72. One end of the eccentric channel 73 is connected to the cavity in the sheath 6, and the other end is connected to the airflow nozzle 74, and the plasma in the cavity of the sheath 6 is ejected from the airflow nozzle 74 through the eccentric channel 73.

[0041] In some embodiments, the eccentric channel 73 and the airflow nozzle 74 are both cylindrical channels, and the diameter of the eccentric channel 73 is larger than the diameter of the airflow nozzle 74. When the airflow is ejected from the airflow nozzle 74, the pressure of the airflow injection can be increased to enhance the cleaning effect.

[0042] In some embodiments, the eccentric channel 73 disposed at the C end 71 is located at the center of the cross section of the C end 71 and is coaxially disposed with the central axis of the sheath 6. The eccentric channel 73 disposed at the D end 72 is not located at the center of the cross section of the D end 72, that is, the center line 731 of the eccentric channel and the center line 77 of the nozzle do not coincide, and there is a certain nozzle angle 78. The size of the nozzle angle 78 is 15 to 75°, preferably 30 to 60°.

[0043] The nozzle angle 78 is set by the eccentric channel 73 and the center line 77 of the nozzle 7. When the nozzle 7 rotates at high speed, the cleaning area of ​​the nozzle 7 is an annular structure, and the annular area is larger than the cross-sectional area of ​​the D end 72. When the spray gun moves with the three-axis drive, the cleaning width is the diameter of the annular structure. Compared with the traditional setting in which the eccentric channel 73 and the center line 77 coincide, the cleaning width is only the diameter of the airflow nozzle 74. The cleaning area of ​​the present application is larger, which can improve the cleaning efficiency. When the volume of the nozzle 7 is constant, the larger the nozzle angle 78 is, the larger the cleaning width is.

[0044] In some embodiments, the center line 731 of the eccentric channel is a straight line, and the center line 731 of the eccentric channel does not coincide with the center line 77 of the nozzle. In the present application, only an eccentric channel is provided, and the center line of the eccentric channel is a straight line, and there is no bent interior in the eccentric channel, thereby solving the technical problem that the bent inner wall in the traditional channel will form a certain resistance to the airflow, causing the air pressure of the high-pressure airflow to decrease when it is ejected, resulting in a shortened ejection distance of the ion gas, and affecting the treatment effect of the plasma cleaning nozzle on the workpiece surface.

[0045] In some embodiments, a counterweight hole 75 is provided on the nozzle 7, and the counterweight hole 75 is located on the side away from the eccentric channel 73. Through the setting of the counterweight hole 75, the weight on both sides of the center line 77 of the nozzle 7 is the same, and the nozzle 7 is more stable during high-speed rotation.

[0046] In some embodiments, a weight-reducing groove 76 extending from the D end 72 to the C end 71 is provided on the nozzle 7. The bottom surface of the weight-reducing groove 76 decreases as the cross-section of the nozzle 7 decreases from the D end 72 to the C end 71. On the premise of preventing the weight-reducing groove 76 from being connected to the eccentric channel 73, the volume of the weight-reducing groove 76 is made as large as possible to reduce the weight of the nozzle 7.

[0047] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A rotary plasma cleaning machine spray gun, characterized in that: The invention comprises a driving assembly (2) and a nozzle (7), wherein the driving assembly (2) and the nozzle (7) are connected, and the driving assembly (2) can drive the nozzle (7) to rotate, wherein the nozzle (7) comprises a C end (71) close to the driving assembly (2), and a D end (72) far from the driving assembly (2), and further comprises an eccentric channel (73), wherein one end of the eccentric channel (73) is arranged at the C end (71), and the other end extends toward the D end (72), and the center line (731) of the eccentric channel is a straight line, and the center line (731) of the eccentric channel and the center line (77) of the nozzle do not overlap.

2. The rotary plasma cleaning machine spray gun according to claim 1, characterized in that: The center line (731) of the eccentric channel and the center line (77) of the nozzle form a nozzle angle (78), and the range of the nozzle angle (78) is 15-75 degrees.

3. The rotary plasma cleaning machine spray gun according to claim 2, characterized in that: The nozzle (7) further comprises an airflow spray hole (74), wherein the airflow spray hole (74) is located at the D end (72) and is connected to the eccentric channel (73), and the center line of the airflow spray hole (74) coincides with the center line (731) of the eccentric channel.

4. The rotary plasma cleaning machine spray gun according to claim 1, characterized in that: It also comprises an air inlet pipe (1), wherein the air inlet pipe (1) is connected to the drive assembly (2), and the air inlet pipe (1) is a bent pipe, and its bending angle is not greater than 120°.

5. The rotary plasma cleaning machine spray gun according to claim 1, characterized in that: It also comprises a main shaft (3), wherein a main shaft cavity (34) is arranged inside the main shaft (3), the main shaft cavity (34) is connected to the air inlet pipe (1), and an electrode fixing seat (4) is arranged at one end of the main shaft cavity (34) close to the nozzle (7), and a through hole (413) is arranged on the electrode fixing seat (4), and the through hole (413) and the main shaft (3) are not arranged in parallel.

6. The rotary plasma cleaning machine spray gun according to claim 5, characterized in that: The electrode fixing seat (4) comprises an electrode fixing plate (41) and an electrode connecting column (42); one end of the electrode connecting column (42) is connected to the electrode fixing plate (41), and the other end is connected to the electrode (5); the side of the electrode fixing plate (41) away from the electrode connecting column (42) is a first side (411); the side of the electrode fixing plate (41) close to the electrode connecting column (42) is a second side (412); the first side (411) and the second side (412) are arranged in parallel; the through hole (413) is arranged between the first side (411) and the second side (412); the through hole (413) and the first side (411) of the electrode fixing plate (41) form an angle (414); and the angle (414) ranges from 15 to 75 degrees.

7. The rotary plasma cleaning machine spray gun according to claim 6, characterized in that: A plurality of through holes (413) are provided, and the plurality of through holes (413) are arranged in a circular array with the center of the electrode fixing plate (41) as the center.

8. The rotary plasma cleaning machine spray gun according to claim 5, characterized in that: The number of the through holes (413) is 4 to 6.

9. The rotary plasma cleaning machine spray gun according to claim 6, characterized in that: An annular groove is provided on the inner wall of the spindle cavity (34), and the electrode fixing plate (41) is clamped in the annular groove.

10. The rotary plasma cleaning machine spray gun according to any one of claims 1 to 9, characterized in that: The drive assembly (2) and the nozzle are connected via a sheath (6), and the length of the sheath (6) is greater than 110 mm.

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