Front gun barrel structure of plasma gun

Abstract

The utility model provides a front gun barrel structure of a plasma spray gun. The front gun barrel structure comprises a spray head, a spray head connecting piece, an electrode tip, a front gun barrel connecting piece and a driving mechanism. The spray head connecting piece is a hollow sleeve, one end of the spray head connecting piece is detachably connected with the spray head, the other end of the spray head connecting piece is detachably connected with the front gun barrel connecting piece, and the spray head connecting piece and the front gun barrel connecting piece form a closed pipe cavity; the other end of the front gun barrel connecting piece is rotationally connected with the driving mechanism, and the electrode tip is detachably connected with the driving mechanism and contained in the spray head connecting piece. The front gun barrel connecting piece comprises a sleeve and a base, the sleeve and the base are integrally formed, and the base is provided with a weight reducing groove. According to the structure, the spray head is detachably connected with the spray head connecting piece, the electrode tip is detachably connected with the driving mechanism, the driving mechanism drives the front gun barrel and the spray head to rotate, the electrode tip can be easily detached and installed when an electrode is replaced, the gravity center balance among the spray head, the electrode tip and the driving mechanism is achieved through the arrangement of the weight reduction groove, and motor shaking is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plasma cleaning devices, in particular to a front gun barrel structure of a plasma spray gun. 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 major types of plasma cleaning equipment: vacuum plasma cleaning machine and atmospheric pressure plasma cleaning machine. The vacuum plasma cleaning machine needs time for vacuum pumping and breaking, and the number of products put in each time is limited, so the production capacity is very limited, and therefore it is only used in specific conditions. The atmospheric pressure plasma cleaning machine does not require a vacuum processing environment, and the process gas is compressed air, which is low in use cost, easy to operate and has a production capacity that can be freely matched according to demand.

[0003] The atmospheric pressure plasma equipment is composed of a high-voltage generating device (plasma power supply) and a plasma generating device (plasma spray gun). Since the range of generated plasma is limited, the effective range is generally between 10-20 mm, and therefore 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.

[0004] At present, the high-voltage line and the ground line are directly connected to the spray gun during assembly of the plasma spray gun, and the other ends of the high-voltage line and the ground line are connected to the power supply. The atmospheric pressure plasma rotary spray gun is rotated by using a motor to drive the front gun barrel and the spray head. The electrode in the spray gun is a consumable that needs to be regularly disassembled, maintained and replaced. The existing front gun barrel structure is complicated in steps when replacing the electrode, and is troublesome to disassemble and assemble, which can easily cause the center of gravity of the spray cavity to deviate, causing the motor to vibrate, and ultimately affecting the use experience of the spray gun and shortening the service life of the spray gun. CONTENT OF THE INVENTION

[0005] In view of the problems, the application is proposed to provide a front gun barrel structure of a plasma spray gun to overcome the problems or at least partially solve the problems.

[0006] The spray head connector is a hollow sleeve, one end of the spray head connector is detachably connected with the spray head, and the other end is detachably connected with the front gun barrel connector. The spray head connector and the front gun barrel connector form a closed pipe cavity.

[0007] The other end of the front gun barrel connector is rotationally connected with the driving mechanism, the electrode head is detachably connected with the driving mechanism and is accommodated in the spray head connector.

[0008] Optionally, the front barrel connector comprises a sleeve and a base, the sleeve and the base are integrally formed, and the base is provided with a weight-reducing groove.

[0009] Optionally, the sleeve is threadedly connected with the nozzle connector, and the base is rotationally connected with the driving mechanism.

[0010] Optionally, the front barrel structure further comprises a ceramic cyclone piece, the ceramic cyclone piece is detachably connected with the electrode head, and the driving mechanism is rotationally connected with the front barrel at the ceramic cyclone piece.

[0011] Optionally, the nozzle connector is provided with threads on the outer periphery, and the two ends of the nozzle connector are threadedly connected with the nozzle and the front barrel connector respectively.

[0012] Optionally, a sealing ring is sleeved at the joint between the nozzle connector and the nozzle, and a sealing ring is sleeved at the joint between the nozzle connector and the front barrel.

[0013] Optionally, the driving mechanism comprises an intermediate shaft, a shaft core, a high-voltage wire and a driving rear cover.

[0014] The shaft core is arranged in the intermediate shaft, and the high-voltage wire is arranged in the shaft core and the driving rear cover.

[0015] The intermediate shaft is fixedly connected with the driving rear cover.

[0016] Optionally, the intermediate shaft is arranged in the front barrel connector, and one end of the intermediate shaft close to the nozzle is detachably connected with the electrode head.

[0017] The other end of the intermediate shaft away from the nozzle is fixedly connected with the driving rear cover.

[0018] Optionally, the driving mechanism is sleeved with an insulating shell.

[0019] Optionally, the driving rear cover is provided with a module for driving.

[0020] The application has the following advantages:

[0021] In the embodiments of the present application, in order to solve the problems of the prior art that the atmospheric pressure plasma rotating spray gun is complicated in steps and troublesome in disassembly and assembly when replacing the electrode, the center of gravity of the spray cavity is easily deviated, the motor is easily shaken, and the service life of the spray gun is shortened, a front gun tube structure of a plasma spray gun is provided, comprising a spray head, a spray head connecting piece, an electrode head, a front gun tube connecting piece and a driving mechanism; the spray head connecting piece is a hollow sleeve, one end of the spray head connecting piece is detachably connected with the spray head, the other end is detachably connected with the front gun tube connecting piece, and the spray head connecting piece and the front gun tube connecting piece form a closed tube cavity; the other end of the front gun tube connecting piece is rotationally connected with the driving mechanism, the electrode head is detachably connected with the driving mechanism and is accommodated in the spray head connecting piece. The front gun tube connecting piece comprises a sleeve and a base, the sleeve and the base are integrally formed, and the base is provided with a weight reduction groove. The front gun tube structure of the plasma spray gun is detachably connected with the spray head, the electrode head is detachably connected with the driving mechanism, the front gun tube connecting piece is detachably connected with the driving mechanism, the driving mechanism drives the front gun tube and the spray head to rotate, the electrode head can be easily disassembled and assembled when replacing the electrode, and the weight reduction groove balances the center of gravity among the spray head, the electrode head and the driving mechanism, so as to reduce the shaking of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 A structure diagram of a front gun tube of a plasma spray gun provided by the present application is shown;

[0024] Figure 2 A structure diagram of a spray head connecting piece of a plasma spray gun provided by the present application is shown;

[0025] Figure 3 A structure diagram of a front gun tube connecting piece of a plasma spray gun provided by the present application is shown.

[0026] The reference signs in the drawings of the specification are as follows:

[0027] 1, spray head; 2, spray head connecting piece; 3, electrode head; 4, front gun tube connecting piece; 5, driving mechanism; 41, sleeve; 42, base; 43, weight reduction groove; 6, ceramic cyclone piece; 7, sealing ring; 8, intermediate shaft; 9, shaft core; 10, high-voltage wire; 11, driving rear cover; 12, insulating shell; 13, module. DETAILED DESCRIPTION

[0028] In order to make the purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] The inventor found through analysis of the prior art that the normal pressure plasma rotating spray gun is rotated by a motor driving a front gun barrel and a spray head, the electrode in the spray gun is a consumable and needs to be disassembled, maintained and replaced regularly. The existing front gun barrel structure is complicated in steps and troublesome to disassemble and assemble when replacing the electrode, which can easily cause the center of gravity of the spray cavity to deviate, causing the motor to vibrate, ultimately affecting the use experience of the spray gun and shortening the service life of the spray gun.

[0030] Reference Figure 1 , Figure 1 A structure schematic diagram of a front gun barrel of a plasma spray gun provided by the present application is shown.

[0031] A front gun barrel structure of a plasma spray gun comprises a spray head 1, a spray head connecting piece, an electrode head 3, a front gun barrel connecting piece 4 and a driving mechanism 5; the spray head connecting piece is a hollow sleeve, one end of the spray head connecting piece is detachably connected with the spray head 1, the other end is detachably connected with the front gun barrel connecting piece 4, the spray head connecting piece and the front gun barrel connecting piece 4 form a closed pipe cavity; the other end of the front gun barrel connecting piece 4 is rotationally connected with the driving mechanism 5, the electrode head 3 is detachably connected with the driving mechanism 5 and is accommodated in the spray head connecting piece.

[0032] In the embodiment of the present application, the front gun tube structure of the plasma torch comprises a torch head 1, a torch head connecting piece, an electrode head 3, a front gun tube connecting piece 4 and a driving mechanism 5; the torch head connecting piece is a hollow sleeve, one end of the torch head connecting piece is detachably connected with the torch head 1, the other end is detachably connected with the front gun tube connecting piece 4, and the torch head connecting piece and the front gun tube connecting piece 4 form a closed lumen; the other end of the front gun tube connecting piece 4 is rotationally connected with the driving mechanism 5, the electrode head 3 is detachably connected with the driving mechanism 5 and is accommodated in the torch head connecting piece. The front gun tube connecting piece 4 comprises a sleeve 41 and a base 42, the sleeve 41 and the base 42 are integrally formed, and the base 42 is provided with a weight-reducing groove 43. The above-mentioned front gun tube structure of the plasma torch is detachably connected between the torch head 1 and the torch head connecting piece, detachably connected between the electrode head 3 and the driving mechanism 5, detachably connected between the front gun tube connecting piece 4 and the driving mechanism 5, and the driving mechanism 5 drives the front gun tube and the torch head 1 to rotate, so that the electrode head 3 can be easily detached and installed when the electrode is replaced. The weight-reducing groove 43 is arranged to balance the centers of gravity among the torch head 1, the electrode head 3 and the driving mechanism 5, thereby reducing the shaking of the motor.

[0033] In the following, the front gun tube structure of the plasma torch in the present exemplary embodiment will be further described.

[0034] In the embodiment of the present application, with reference to Figure 2 , the front gun tube connecting piece 4 comprises a sleeve 41 and a base 42, the sleeve 41 and the base 42 are integrally formed, and the base 42 is provided with a weight-reducing groove 43. The sleeve 41 is threadedly connected with the torch head connecting piece 2, and the base 42 is rotationally connected with the driving mechanism 5.

[0035] It should be noted that the sleeve 41 is a hollow cylinder with both ends open, and the inner side of the sleeve 41 close to one end of the torch head 1 is provided with a connecting groove. The shape, structure and number of the weight-reducing grooves 43 are not specially limited in the present application and are set according to the degree of fit. One end of the base 42 is connected with the driving mechanism 5, and the other end is fixedly connected with the sleeve 41.

[0036] In the embodiment of the present application, the front gun tube structure further comprises a ceramic cyclone piece 6, the ceramic cyclone piece 6 is detachably connected with the electrode head 3, and the driving mechanism 5 is rotationally connected with the connection of the front gun tube through the ceramic cyclone piece 6.

[0037] It should be noted that when the electrode is replaced, only the connection of the front gun tube needs to be unscrewed.

[0038] In the embodiment of the present application, with reference to Figure 3The outer periphery of the spray head connecting piece 2 is provided with threads, and the two ends of the spray head connecting piece 2 are respectively threadedly connected with the spray head 1 and the front gun barrel connecting piece 4.

[0039] In an embodiment of the present application, a sealing ring 7 is sleeved at the joint between the spray head connecting piece 2 and the spray head 1, and a sealing ring 7 is sleeved at the joint between the spray head connecting piece 2 and the front gun barrel.

[0040] In an embodiment of the present application, the driving mechanism 5 comprises an intermediate shaft 8, a shaft core 9, a high-voltage wire 10 and a driving rear cover 11; the shaft core 9 is penetrated through the intermediate shaft 8, the high-voltage wire 10 is penetrated through the shaft core 9 and the driving rear cover 11; and the intermediate shaft 8 is fixedly connected with the driving rear cover 11.

[0041] It should be noted that the ceramic cyclone piece 6 is connected to the intermediate shaft 8, and after the compressed air flows out from the airflow hole of the air pipe joint, the cyclone piece generates a rotating uniform airflow, which is sprayed out from the spray head 1; the airflow channel in the spray head 1 is specially designed, and the bending direction and bending degree are customized according to requirements.

[0042] In an embodiment of the present application, the intermediate shaft 8 is penetrated through the front gun barrel connecting piece 4, and one end of the intermediate shaft 8 close to the spray head 1 is detachably connected with the electrode head 3; the other end of the intermediate shaft 8 away from the spray head 1 is fixedly connected with the driving rear cover 11, the driving mechanism 5 is sleeved with an insulating shell 12, and the driving rear cover 11 is provided with a module 13 for driving.

[0043] It should be noted that the cyclone piece is connected to the electrode head 3, when high-voltage electricity is applied to the built-in electrode, the electrode head 3 discharges with the front gun barrel wall, breaks through the flowing gas, forms plasma, and then the plasma is blown out by the compressed air and acts on the surface of the product being processed.

[0044] Although the preferred embodiments of the present application have been described, those skilled in the art can make other changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the changes and modifications falling within the scope of the embodiments of the present application.

[0045] Finally, it needs to be pointed out that in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or terminal device including a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or terminal device. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or terminal device including the element.

[0046] The above describes in detail the front lance structure of the plasma torch provided by the present application, and the principles and implementation manners of the present application are described by applying specific examples in this document. The above description of the examples is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application ranges; in view of the above, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A front gun tube structure of a plasma torch, characterized by, The application relates to a front gun tube structure, which comprises a spray head, a spray head connecting piece, an electrode head, a front gun tube connecting piece and a driving mechanism. The spray head connecting piece is a hollow sleeve, one end of the spray head connecting piece is detachably connected with the spray head, the other end is detachably connected with the front gun tube connecting piece, and the spray head connecting piece and the front gun tube connecting piece form a closed pipe cavity. The other end of the front gun tube connecting piece is rotationally connected with the driving mechanism, the electrode head is detachably connected with the driving mechanism and is accommodated in the spray head connecting piece.

2. The front barrel structure according to claim 1, characterized by The front gun tube connecting piece comprises a sleeve and a base, the sleeve and the base are integrally formed, and the base is provided with a weight-reducing groove.

3. The front barrel structure according to claim 2, characterized by The sleeve is screw-connected with the spray head connecting piece, and the base is rotationally connected with the driving mechanism.

4. The forend structure of claim 1, wherein, The front gun tube structure further comprises a ceramic cyclone piece, the ceramic cyclone piece is detachably connected with the electrode head, and the driving mechanism is rotationally connected with the front gun tube through the ceramic cyclone piece.

5. The forend structure of claim 1, wherein, The spray head connecting piece is provided with threads on the outer periphery, and the two ends of the spray head connecting piece are screw-connected with the spray head and the front gun tube connecting piece respectively.

6. The front barrel structure of claim 1, wherein Sealing rings are arranged on the joint between the spray head connecting piece and the spray head and on the joint between the spray head connecting piece and the front gun tube.

7. The front barrel structure of claim 1, wherein The driving mechanism comprises an intermediate shaft, a shaft core, a high-voltage wire and a driving rear cover. The shaft core is arranged through the intermediate shaft, and the high-voltage wire is arranged through the shaft core and the driving rear cover. The intermediate shaft is fixedly connected with the driving rear cover.

8. The front barrel structure according to claim 7, characterized by The intermediate shaft is arranged through the front gun tube connecting piece, and one end of the intermediate shaft close to the spray head is detachably connected with the electrode head. The other end of the intermediate shaft away from the spray head is fixedly connected with the driving rear cover.

9. The front barrel structure according to claim 7, characterized by The driving mechanism is arranged with an insulating shell.

10. The front barrel structure of claim 7, wherein The driving rear cover is provided with a module for driving.

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