Spray head structure and plasma spray gun used by same

Abstract

The utility model provides a spray head structure and a plasma spray gun thereof.The spray head comprises a fan-shaped barrel and an air inlet part, the top of the fan-shaped barrel is fixedly connected with one end of the air inlet part, the other end of the air inlet part is connected with a front gun barrel of the plasma spray gun, and the air inlet part is provided with a first spraying cavity; the fan-shaped barrel is provided with a second injection cavity, a third injection cavity, a fourth injection cavity and a balance part used for balancing the gravity center of the nozzle, the second injection cavity is communicated with the first injection cavity, the third injection cavity and the fourth injection cavity are both communicated with the second injection cavity, and the third injection cavity and the fourth injection cavity are arranged at a preset included angle. The spray gun using the spray head comprises the spray head, a front gun barrel, an electrode tip, a motor and a rear gun barrel. The plasma spray gun can spray plasmas in a larger area through the double-hole structure, meanwhile, the situation that the plasma cannot be generated or the sprayed plasmas are too dispersed due to the fact that the spray cavities are too dispersed is avoided, and compared with a multi-spray-cavity structure, the double-spray-cavity structure is simpler, and the higher technological standard can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma cleaning device, in particular to a nozzle structure and a plasma spray gun using the same. BACKGROUND

[0002] Plasma cleaning technology has been increasingly applied in industrial production, automobile manufacturing, medical health, aerospace and other fields. In particular, it is increasingly applied in the field of electronic industry. At present, there are two main types of plasma cleaning equipment: one is vacuum plasma cleaning machine, and the other is atmospheric pressure plasma cleaning machine.

[0003] The vacuum plasma cleaning machine includes a vacuum pump and a processing cavity. The principle is to first put the product into the processing cavity, then pump the processing cavity to a vacuum state of about 30Pa, then introduce process gas, generate plasma by ionizing the process gas, and thus process the product. This type of plasma cleaning machine needs time to pump and break the vacuum, and the number of products put in each time is limited, so the production capacity is very limited, and it is only used in specific conditions. The atmospheric pressure plasma cleaning machine uses high-voltage ionized compressed air to generate plasma, and applies the plasma to the surface of the product to be processed. It does not require a vacuum processing environment, and the process gas is compressed air, which has low use cost, is easy to operate, and the production capacity can be freely matched according to demand.

[0004] The atmospheric pressure plasma equipment is composed of a high-voltage generating device and a plasma generating device. Since the range of generated plasma is limited, generally within 10-20mm, the high-voltage line and the ground line, as well as the corresponding spray gun motor drive line and air pipe, need to be connected between the plasma power supply and the plasma spray gun. The current plasma spray gun directly connects the high-voltage line and the ground line to the spray gun during assembly, and then connects the other end of the high-voltage line and the ground line to the power supply. The atmospheric pressure plasma rotary spray gun is rotated by the motor to drive the front gun barrel and the nozzle. The nozzle range is in the interval of 20-120mm, and the larger the gun head, the worse the processing effect.

[0005] However, the current plasma spray gun has the following disadvantages: the spray gun device structure is complex, which cannot meet the customer's requirement for process precision; the sealing is not good enough, and the conversion rate of plasma is not high; the spraying area is not large, the plasma sprayed by the surface treatment machine is not uniform, and the work efficiency is low. CONTENT OF THE INVENTION

[0006] In view of the above problems, the present application is proposed to provide a nozzle structure and a plasma spray gun using the same, which can overcome the above problems or at least partially solve the problems. The nozzle structure comprises a fan-shaped cylinder and a gas inlet part, one end of the gas inlet part is fixedly connected to the top of the fan-shaped cylinder, and the other end of the gas inlet part is connected to the front gun barrel of the plasma spray gun.

[0007] The air inlet part is provided with a first injection cavity, the fan-shaped cylinder is provided with a second injection cavity, a third injection cavity and a fourth injection cavity, the second injection cavity is communicated with the first injection cavity, the third injection cavity and the fourth injection cavity are both communicated with the second injection cavity, and the third injection cavity and the fourth injection cavity are arranged at a preset included angle.

[0008] The fan-shaped cylinder is further provided with a balancing piece for balancing the gravity center of the spray head.

[0009] Optionally, the cavity diameter of the second injection cavity at one end away from the first injection cavity is smaller than the cavity diameter at the other end, the cavity diameter of the third injection cavity is smaller than the cavity diameter of the second injection cavity, and the cavity diameter of the fourth injection cavity is smaller than the cavity diameter of the second injection cavity.

[0010] Optionally, the first injection cavity is vertically arranged;

[0011] The second injection cavity is arranged at a first preset inclination angle;

[0012] The third injection cavity is arranged at a second preset inclination angle;

[0013] The fourth injection cavity is arranged at a third preset inclination angle.

[0014] Optionally, the fan-shaped cylinder is further provided with a plurality of shaft cavities, and the plurality of shaft cavities are arranged in a ring array in the fan-shaped cylinder.

[0015] Optionally, the balancing piece is mounted in the shaft cavity.

[0016] A plasma torch using the spray head as described above, comprising

[0017] a spray head, a front gun barrel, an electrode head, a motor and a rear gun barrel;

[0018] The front end of the front gun barrel is connected with the spray head, the rear end of the front gun barrel is connected with the electrode head, and a sealing ring is arranged at the connection between the spray head and the front gun barrel.

[0019] The rear end of the electrode head is connected with the motor, and the rear end of the motor is connected with the rear gun barrel.

[0020] Optionally, the motor comprises an intermediate shaft and a driving rear seat.

[0021] One end of the intermediate shaft is in shaft connection with the driving rear seat, and the other end of the intermediate shaft is connected with the electrode head.

[0022] The intermediate shaft and the electrode head are connected through a cyclone piece.

[0023] Optionally, the intermediate shaft is a hollow aluminum shaft, and the motor is provided with an insulating shell.

[0024] Optionally, the plasma torch further comprises a high-pressure wire;

[0025] The high-pressure wire is arranged in the rear barrel and the intermediate shaft of the motor and connected with the electrode head.

[0026] Optionally, the rear barrel is sleeved with a holding sleeve, and the holding sleeve is provided with anti-skid lines.

[0027] The application has the following advantages:

[0028] In the embodiments of the application, in order to solve the problems of complex structure, small spraying area and excessively dispersed plasma spraying port in the prior art, a nozzle structure and a plasma torch using the same are provided. The nozzle comprises a fan-shaped barrel and a gas inlet part. The top of the fan-shaped barrel is fixedly connected with one end of the gas inlet part, and the other end of the gas inlet part is connected with a front barrel of the plasma torch. The gas inlet part is provided with a first spraying cavity, and the fan-shaped barrel is provided with a second spraying cavity, a third spraying cavity and a fourth spraying cavity. The second spraying cavity is in communication with the first spraying cavity, and the third spraying cavity and the fourth spraying cavity are both in communication with the second spraying cavity. The third spraying cavity and the fourth spraying cavity are arranged at a preset included angle. The fan-shaped barrel is further provided with a balancing piece for balancing the gravity center of the nozzle. The above-mentioned plasma torch realizes larger-area spraying of plasma through a double-hole structure, and meanwhile, the spraying cavities are not excessively dispersed so as to be unable to generate plasma or the sprayed plasma is too dispersed. The double-spraying-cavity structure is simpler than the multiple-spraying-cavity structure, and the process standard that can be achieved is higher. The sealing ring is arranged to make the plasma torch more airtight, thereby improving the conversion rate of the plasma. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed to be used in the description of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0030] Figure 1 The overall structure of the nozzle provided by the application is shown in the schematic view;

[0031] Figure 2 The cross-sectional structure of the nozzle provided by the application is shown in the schematic view;

[0032] Figure 3 The internal structure of the nozzle provided by the application is shown in the schematic view;

[0033] Figure 4 The structure of the nozzle structure and the plasma torch using the same provided by the application is shown in the schematic view.

[0034] The reference numerals in the accompanying drawings are as follows:

[0035] 1. Air inlet; 2. Fan-shaped cylinder; 3. First injection chamber; 4. Second injection chamber; 5. Third injection chamber; 6. Fourth injection chamber; 7. Shaft cavity; 8. Front barrel; 9. Electrode head; 10. Motor; 11. Rear barrel; 12. Intermediate shaft; 13. Drive recoil; 14. Cyclone component; 15. Nozzle. Detailed Implementation

[0036] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] The inventors discovered through analysis of existing technologies that existing plasma spray guns have multiple spray chambers in the nozzle. Multiple spray chambers lead to complex structure and workmanship. Although the design of multiple spray chambers increases the spraying area, it also makes the sprayed plasma too dispersed, resulting in uneven spraying and reduced work efficiency. Furthermore, simply increasing the number of spray chambers reduces the sealing of the nozzle, which greatly affects the plasma conversion.

[0038] Reference Figures 1-3 The diagram shows a schematic of a nozzle structure provided in this application. The nozzle of a plasma spray gun includes a fan-shaped cylindrical body 2 and an air inlet 1. The top of the fan-shaped cylindrical body 2 is fixedly connected to one end of the air inlet 1, and the other end of the air inlet 1 is connected to the front barrel of the plasma spray gun. The air inlet 1 is provided with a first spray chamber 3, and the fan-shaped cylindrical body 2 is provided with a second spray chamber 4, a third spray chamber 5, and a fourth spray chamber 6. The second spray chamber 4 communicates with the first spray chamber 3, and the third spray chamber 5 and the fourth spray chamber 6 are both communicated with the second spray chamber 4. The third spray chamber 5 and the fourth spray chamber 6 are arranged at a preset angle. The fan-shaped cylindrical body 2 is also provided with a balancing component.

[0039] Reference Figure 4 This application illustrates a plasma spray gun using the nozzle structure described above, specifically including a nozzle 15, a front barrel 8, an electrode head 9, a motor 10, and a rear barrel 11. The front end of the front barrel 8 is connected to the nozzle 15, and the rear end of the front barrel 8 is connected to the electrode head 9. A sealing ring is provided at the connection between the nozzle 15 and the front barrel 8. The rear end of the electrode head 9 is connected to the motor 10, and the rear end of the motor 10 is connected to the rear barrel 11.

[0040] In an embodiment of this application, the nozzle 15 includes a fan-shaped cylindrical body 2. The top of the fan-shaped cylindrical body 2 is provided with a first spray chamber 3. The fan-shaped cylindrical body 2 also includes a second spray chamber 4, a third spray chamber 5, and a fourth spray chamber 6. The second spray chamber 4 communicates with the first spray chamber 3. The third spray chamber 5 and the fourth spray chamber 6 are both communicated with the second spray chamber 4. The third spray chamber 5 and the fourth spray chamber 6 are arranged at a predetermined angle. A plasma spray gun using the nozzle 15 described above includes a nozzle 15, a front gun barrel 8, an electrode head 9, a motor 10, and a rear gun barrel 11. The front end of the front gun barrel 8 is connected to the nozzle 15, and the rear end of the front gun barrel 8 is connected to the electrode head 9. A sealing ring is provided at the connection between the nozzle 15 and the front gun barrel 8. The rear end of the electrode head 9 is connected to the motor 10, and the rear end of the motor 10 is connected to the rear gun barrel 11. The aforementioned plasma spray gun achieves a larger area of ​​plasma spraying through a dual-hole structure, while preventing the spray chamber from becoming too dispersed, thus avoiding the inability to generate plasma or the ejected plasma being too dispersed. The dual-hole structure is simpler than the multi-hole structure and can achieve higher process standards. The sealing ring makes the spray gun more airtight, thereby improving the plasma conversion rate.

[0041] The following will further describe a nozzle structure and the plasma spray gun used in this exemplary embodiment.

[0042] In one embodiment of this application, the diameter of the end of the second injection chamber 4 away from the first injection chamber 3 is smaller than the diameter of the other end of the second injection chamber 4, the diameter of the third injection chamber 5 is smaller than the diameter of the second injection chamber 4, and the diameter of the fourth injection chamber 6 is smaller than the diameter of the second injection chamber 4.

[0043] It should be noted that the lengths of the first spray chamber 3, the third spray chamber 5, and the fourth spray chamber 6 are significantly shorter than the length of the second spray chamber 4. Specifically, the length of the third spray chamber 5 is slightly longer than the length of the fourth spray chamber 6. A large amount of plasma enters the first spray chamber 3 with a strong airflow for initial concentration and then is further propelled by the strong airflow into the second spray chamber 4, which has a smaller diameter and a longer length. This plasma then enters the third spray chamber 5 and the fourth spray chamber 6 in two separate paths, ultimately being ejected from both chambers onto the surface of the object to be cleaned. This dual-chamber design allows for larger-area plasma spraying without causing excessive dispersion of the spray chambers, which could result in insufficient plasma flow or uneven spraying. Compared to multiple-chamber structures, the dual-chamber design is simpler and achieves higher process standards.

[0044] In one embodiment of this application, the first injection chamber 3 is vertically oriented; the second injection chamber 4 is oriented at a first preset tilt angle; the third injection chamber 5 is oriented at a second preset tilt angle; and the fourth injection chamber 6 is oriented at a third preset tilt angle. The fan-shaped cylinder 2 is also provided with a plurality of shaft cavities 7, which are arranged in a circular array on the fan-shaped cylinder 2. A balancing component is installed in each shaft cavity 7.

[0045] It should be noted that the first preset tilt angle is the angle between the extension line of the second injection chamber and the bottom surface of the fan-shaped cylinder, and the angle range of the first preset tilt angle is 35° to 40°.

[0046] It should be noted that the second preset tilt angle is the angle between the extension line of the third injection chamber and the bottom surface of the fan-shaped cylinder, and the angle range of the first preset tilt angle is 20° to 30°.

[0047] It should be noted that the third preset tilt angle is the angle between the extension line of the fourth injection chamber and the bottom surface of the fan-shaped cylinder, and the angle range of the first preset tilt angle is 45° to 70°.

[0048] It should be noted that multiple shaft cavities 7 are arranged in a ring array in the fan-shaped cylinder 2, and each shaft cavity 7 is equipped with a balancing component. The weight of these balancing components is equivalent to the weight of the plasma in the jet cavity, thereby achieving the center of gravity balance of the entire nozzle 15.

[0049] In one embodiment of this application, a plasma spray gun using the nozzle 15 as described above includes a nozzle 15, a front barrel 8, an electrode head 9, a motor 10, and a rear barrel 11. The front end of the front barrel 8 is connected to the nozzle 15, and the rear end of the front barrel 8 is connected to the electrode head 9. A sealing ring is provided at the connection between the nozzle 15 and the front barrel 8. The sealing ring improves the airtightness of the spray gun, thereby increasing the plasma conversion rate. The rear end of the electrode head 9 is connected to the motor 10, and the rear end of the motor 10 is connected to the rear barrel 11.

[0050] In one embodiment of this application, the motor 10 includes an intermediate shaft 12 and a drive rear seat 13. One end of the intermediate shaft 12 is axially connected to the drive rear seat 13, and the other end of the intermediate shaft 12 is connected to the electrode head 9; the intermediate shaft 12 and the electrode head 9 are connected by a cyclone component 14. The intermediate shaft 12 is a hollow aluminum shaft, and the motor 10 is fitted with an insulating outer shell.

[0051] In one embodiment of this application, the plasma spray gun further includes a high-voltage wire, which passes through the rear gun barrel 11 and the intermediate shaft 12 of the motor 10 and is connected to the electrode head 9. The rear gun barrel 11 is fitted with a grip sleeve, which has anti-slip texture.

[0052] It should be noted that using a hollow shaft to drive the plasma gun head to rotate has the advantage of reducing transmission losses. The power supply is connected to the electrodes, which generate plasma. The gas tube blows into the jet chamber, ejecting the plasma from the nozzle of the rotating plasma gun head. The jet channel is at a certain angle to the rotation axis of the plasma gun head, which can expand the ejection area of ​​the ejected plasma without making it too dispersed.

[0053] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0054] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0055] The above provides a detailed description of a nozzle structure and the plasma spray gun used in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A nozzle for a plasma torch, characterized by, The fan-shaped cylinder is fixedly connected with one end of the air inlet part, and the other end of the air inlet part is connected with the front gun barrel of the plasma torch; The air inlet part is provided with a first injection cavity, the fan-shaped cylinder is provided with a second injection cavity, a third injection cavity and a fourth injection cavity, the second injection cavity is communicated with the first injection cavity, the third injection cavity and the fourth injection cavity are both communicated with the second injection cavity, and the third injection cavity and the fourth injection cavity are arranged at a preset included angle. The fan-shaped cylinder is further provided with a balancing member for balancing the gravity center of the spray head.

2. The showerhead of claim 1, wherein The cavity diameter of the second injection cavity at one end away from the first injection cavity is smaller than the cavity diameter of the second injection cavity at the other end, the cavity diameter of the third injection cavity is smaller than the cavity diameter of the second injection cavity, and the cavity diameter of the fourth injection cavity is smaller than the cavity diameter of the second injection cavity.

3. The showerhead of claim 1, wherein The first injection cavity is vertically arranged; The second injection cavity is arranged at a first preset inclination angle; The third injection cavity is arranged at a second preset inclination angle; The fourth injection cavity is arranged at a third preset inclination angle.

4. The showerhead of claim 1, wherein The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder.

5. The showerhead of claim 4, wherein, The balancing member is arranged in the shaft cavities.

6. A plasma torch using the torch tip of claim 1, wherein The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities.

7. The plasma torch of claim 6, wherein, The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder.

8. The plasma torch of claim 7, wherein, The balancing member is arranged in the shaft cavities.

9. The plasma torch of claim 6, wherein, The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities.

10. The plasma torch of claim 6, wherein, The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. The balancing member is arranged in the shaft cavities. The fan-shaped cylinder is further provided with a plurality of shaft cavities which are arranged in a ring array in the fan-shaped cylinder. 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