Rotational flow powder electrostatic spraying device

Abstract

The utility model relates to the technical field of powder electrostatic spraying, in particular to a rotational flow powder electrostatic spraying device which comprises a spray gun, the spray gun comprises an air inlet pipe, a rotational flow generator and a spray pipe are arranged in the spray gun, the rotational flow generator is connected with the spray pipe, the air inlet pipe is connected with the rotational flow generator, and the spray pipe is connected with the rotational flow generator. The air inlet pipe is used for providing compressed air and providing airflow for the rotational flow generator, the spray gun is further provided with a powder inlet pipe, the powder inlet pipe is communicated with the rotational flow generator and used for conveying powder coating into the rotational flow generator, and the rotational flow generator is used for evenly rotating and dispersing the powder coating. The spray pipe is used for conveying powder coating from the rotational flow generator, and a flow limiting core is arranged in the rotational flow generator and used for limiting the movement range of airflow.

Description

Technical Field

[0001] The present invention relates to the technical field of powder electrostatic spraying, and in particular to a swirl powder electrostatic spraying device. Background Art

[0002] The powder electrostatic spray gun is mainly a spray tool used to coat the surface of workpieces, and is mainly used for coating metals and other conductive materials. The working principle of the powder electrostatic spray gun is to allow the powder coating particles to be blown by the auxiliary airflow provided by the powder pump, and then transported to the nozzle of the powder electrostatic spray gun through the powder delivery pipe and sprayed out from the nozzle of the gun head in an atomized state. An electrode needle that can release high-voltage static electricity is provided at the center of the nozzle. The electrode needle can radiate a high-voltage static corona field to the sprayed surface. When the atomized powder coating particles pass through the corona field, the powder coating will be charged with static electricity. Finally, the powder coating particles with static electricity will be adsorbed on the grounded surface of the sprayed workpiece. This spraying process is an electrostatic spraying process.

[0003] For electrostatic powder spray guns, not only does the sprayed powder need to have static electricity, but the uniformity of the sprayed powder and the size of the spray width are also very important. Uneven sprayed powder will lead to inconsistent coating thickness on various parts of the sprayed surface, resulting in an unsightly concave and convex reflective effect. In addition, areas where the spray is too thick are prone to waste paint, and areas where the spray is too thin are prone to bottom exposure, which not only affects the appearance but also causes the product to rust. Therefore, the dispersion uniformity of the powder sprayed from the spray gun has a great influence on the spraying effect and the product qualification rate.

[0004] Patent No. 202210275569.3 discloses a swirl powder electrostatic spraying equipment, which is achieved by setting a certain angle between the extended line of the airflow injection direction of the jet hole and the line connecting the jet hole to the center of the cup structure of the swirl generator, so that a high-speed rotating airflow is generated in the swirl generator to evenly disperse the powder coating; by setting the pipe diameter in the spray gun to gradually increase, the flow rate of the powder coating is reduced, so that the sprayed powder coating has sufficient time to carry an electric charge; the adjustment sleeve changes the spray trajectory of the mist powder coating sprayed by the spray gun, and the spray radius diameter is adjusted by closing the angle of the spray range to change the spray area of ​​the spray gun. However, during the spraying process, the above-mentioned spraying equipment needs to regularly clean the powder coating accumulated on the inner wall of the swirl generator, around the electrostatic needle, and on the inner wall of the adjustment sleeve, which brings inconvenience to the maintenance of the spraying line. Utility Model Content

[0005] In view of the deficiencies or problems existing in the prior art, the present invention provides a swirl powder electrostatic spraying device, which has a good spraying effect and does not require frequent cleaning of the swirl generator.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a swirl powder electrostatic spraying device, including a spray gun, the spray gun including an air inlet pipe, a swirl generator and a nozzle are arranged in the spray gun, the swirl generator is connected to the nozzle, the air inlet pipe is connected to the swirl generator, the air inlet pipe is used to provide compressed air, and provides airflow to the swirl generator, the spray gun is also provided with a powder inlet pipe, the powder inlet pipe is connected to the swirl generator, the powder inlet pipe is used to transport powder coating into the swirl generator, the swirl generator is used to evenly rotate and disperse the powder coating, the nozzle is used to transport the powder coating from the swirl generator, and a limiting flow core is arranged in the swirl generator, and the limiting flow core is used to limit the movement range of the airflow.

[0007] As a preferred embodiment, the swirl generator is a cup-shaped structure, an installation site is provided in the swirl generator, and the current limiting core is provided with a base, and the current limiting core is arranged at the installation site through the base.

[0008] As a preferred embodiment, the swirl generator is further provided with an inner powder inlet pipe, one end of which is connected to the base, and the other end of which is movably connected to the flow limiting core. The flow limiting core is also provided with an inner powder outlet, which is communicated with the inner powder inlet pipe.

[0009] As a preferred embodiment, the wall surface of the swirl generator is provided with at least one jet hole, which is used to introduce airflow into the swirl generator; the extension line of the airflow injection direction forms a certain angle with the center of the cup-shaped structure of the swirl generator, thereby, the airflow drives the powder coating entering the swirl generator to rotate and disperse.

[0010] As a preferred embodiment, the swirl generator includes an inner cup body and an outer cup body, the jet hole is arranged on the cup wall of the inner cup body, and the flow limiting core is arranged inside the inner cup body.

[0011] As a preferred embodiment, the nozzle includes a primary nozzle and a secondary nozzle, both ends of the primary nozzle are connected to a swirl generator and a secondary nozzle respectively, and the diameter of the secondary nozzle is larger than that of the primary nozzle.

[0012] As a preferred embodiment, the spray gun includes a diffusion disk and a charge load module, wherein the diffusion disk is used to radiate and spray powder coating in all directions, and the diffusion disk is installed at the injection port of the nozzle, and the charge load module is arranged on the nozzle and the diffusion disk, and the charge load module is used to make the sprayed powder coating carry static electricity.

[0013] As a preferred embodiment, the charge load module includes an electrode ring and an electrode needle, wherein the electrode needle is mounted on the electrode ring; the inner side of the electrode ring is adapted to the outer wall of the diffusion disk, and the diffusion disk and the electrode ring form a trumpet shape.

[0014] As a preferred embodiment, it also includes a dust removal mechanism, which includes an air guide ring, the air guide ring includes a dust removal groove, the notch of the dust removal groove faces the front of the spray gun nozzle, and the electrode needle is at least partially arranged in the dust removal groove.

[0015] As a preferred embodiment, a plurality of working holes matching the electrode needles are provided at the bottom of the dust removal groove, and the electrode needles pass through the working holes; a plurality of blowing holes are also provided on the outer side of the dust removal groove.

[0016] As a preferred embodiment, it also includes a spray width regulator, which includes an airway support body, a circumferential airway and a spray width adjustment hole. The circumferential airway is arranged in the airway support body, and the spray width adjustment hole is arranged on the outside of the airway support body. The spray width adjustment hole is communicated with the circumferential airway.

[0017] Compared with the existing products, since a limiting flow core is arranged in the swirl generator, the limiting flow core is used to limit the movement range of the airflow, so that the high-speed rotating airflow in the swirl generator can only rotate around the annular sandwich between the limiting flow core and the inner wall of the swirl generator tube, and move to the nozzle in a spiral trajectory under the impetus of the continuous high-speed rotating airflow, so as to avoid the negative pressure generated at the axial center of the tube cavity due to the rotation of the high-speed airflow in the swirl generator to suck the powder coating into the swirl generator, so that the powder coating cannot enter the swirl generator; in addition, it can also avoid the powder coating from generating static electricity due to high-speed friction with the inner wall of the tube of the swirl generator, and then adsorbing and accumulating the powder coating on the inner wall of the tube of the swirl generator due to the adsorption effect of static electricity, effectively solving the problem that the inner wall of the swirl generator tube will accumulate powder coating and need to be cleaned regularly, and at the same time, the service life of the swirl generator is improved because there is no wear of the powder coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is one of the structural schematic diagrams of the cyclone powder electrostatic spraying device disclosed in the present invention;

[0020] Figure 2 is one of the cross-sectional views of the cyclone powder electrostatic spraying device disclosed in the present invention;

[0021] Figure 3 This disclosure Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4This disclosure Figure 2 A partial enlarged view of point B in the middle;

[0023] Figure 5 This is the second structural schematic diagram of the cyclone powder electrostatic spraying device disclosed in the present invention;

[0024] Figure 6 This is the second cross-sectional view of the cyclone powder electrostatic spraying device disclosed in the present invention;

[0025] Figure 7 This is the third cross-sectional view of the cyclone powder electrostatic spraying device disclosed in the present invention;

[0026] Figure 8 This disclosure Figure 7 A partial enlarged view of point C in the middle;

[0027] Fig. 9 is a cross-sectional view of the dust removal mechanism disclosed herein;

[0028] Fig.10 It is one of the structural schematic diagrams of the spray width regulator disclosed in the present invention;

[0029] Fig.11 This disclosure Fig.10 A partial enlarged view of point D in the middle;

[0030] Fig.12 This is the second structural schematic diagram of the spray width regulator disclosed in the present invention;

[0031] Fig.13 This disclosure Fig.12 A partial enlarged view of point E in the middle.

[0032] Description of reference numerals:

[0033] 1. Spray gun; 2. Swirl generator; 4. Flow limiting core; 5. Jet hole; 6. First-stage nozzle; 7. Second-stage nozzle; 8. Diffuser; 9. Sealing ring 1; 10. Inner cup; 11. Outer cup; 12. Cavity; 13. Sealing ring 1; 14. Inner powder inlet pipe; 15. Sealing ring 2; 16. Sealing ring 3; 17. Sealing ring 4; 18. Sealing ring 2; 20. Thread 2; 21. Step 1; 22. Step 2; 23. Electrode needle; 24. Air guide ring; 241. Dust removal groove; 25. Emission hole; 26, blowing hole; 27, first air channel; 28, annular pressure cover; 30, spray width regulator; 31, spray width adjustment hole; 32, circumferential air channel; 33, air inlet; 34, working hole; 35, air channel support; 36, screw; 37, sealing ring five; 38, sealing ring six; 40, air pipe interface; 41, base; 43, inner powder outlet; 44, grounding wire; 45, annular interlayer; 46, hollow screw; 47, hollow pressure cap; 471, metal sleeve; 48, thread four. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0035] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention 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. Therefore, the above terms should not be understood as limiting the present invention.

[0036] Please see Figure 1 to Figure 5 As shown, an embodiment of the present disclosure discloses a swirl powder electrostatic spraying device, including a spray gun 1, the spray gun 1 includes an air inlet pipe, a swirl generator 2 and a nozzle are arranged in the spray gun 1, the swirl generator 2 is connected to the nozzle, the air inlet pipe is connected to the swirl generator 2, the air inlet pipe is used to provide compressed air, and provides airflow to the swirl generator 2. A powder inlet pipe is also provided on the spray gun 1, and the powder inlet pipe is connected to the swirl generator 2. The powder inlet pipe is used to transport powder coating into the swirl generator 2, the swirl generator 2 is used to evenly rotate and disperse the powder coating, the nozzle is used to transport the powder coating from the swirl generator 2, and a plurality of jet holes 5 are arranged on the wall of the swirl generator 2. The swirl generator 2 is a cup-shaped structure, and the jet holes 5 are used to introduce high-speed airflow into the swirl generator 2. Under the action of the high-speed rotating airflow generated by the swirl generator 2 through the jet hole 5, the powder coating is fully dispersed. Under the action of the centrifugal force brought by the rotating airflow, the evenly dispersed part of the powder coating spirally crawls along the inner wall of the nozzle toward the nozzle mouth at high speed, and finally radiates evenly to the surroundings along the inner wall of the diffusion disk 8 arranged at the nozzle mouth. At the same time, some of the powder coating does not spirally move along the inner wall of the tube, but moves toward the nozzle mouth in the inner cavity of the nozzle along with the rotating airflow generated by the swirl generator 2, and is directly and evenly sprayed out from the nozzle mouth. A limiting flow core 4 is arranged in the swirl generator 2, and the limiting flow core 4 is used to limit the movement range of the airflow, so that the high-speed rotating airflow in the swirl generator 2 can only rotate around the annular interlayer 45 between the limiting flow core 4 and the inner wall of the swirl generator 2 tube, and move toward the nozzle in a spiral trajectory under the impetus of the continuous high-speed rotating airflow, so as to avoid the negative pressure generated at the axial center of the tube cavity due to the rotation of the high-speed airflow in the swirl generator 2 to suck the powder coating into the swirl generator 2, thereby preventing the powder coating from entering the swirl generator 2.

[0037] It should be noted that the extension line of the airflow injection direction is at a certain angle to the center of the cup-shaped structure of the swirl generator 2, whereby the airflow drives the powder coating entering the swirl generator 2 to rotate and disperse, and the direction of the gas ejected from the jet hole 5 is at a certain angle to the center of the cross-section of the cup-shaped structure of the swirl generator 2. The nozzle includes a primary nozzle 6 and a secondary nozzle 7, the two ends of the primary nozzle 6 are respectively connected to the swirl generator 2 and the secondary nozzle 7, the diameter of the secondary nozzle 7 is larger than the diameter of the primary nozzle 6, and the secondary nozzle 7 is connected to a diffusion disk 8, which is used to radiate and spray powder coating in all directions, and the diffusion disk 8 is arranged at the nozzle mouth of the spray gun 1.

[0038] For further information, please continue to see Figure 2 As shown, the swirl generator 2 is a cup-shaped structure, an installation site is provided in the swirl generator 2, and the current limiting core 4 is provided with a base 41, and the current limiting core 4 is screwed to the installation site through the base 41. Specifically, a sealing ring 19 is provided on the base 41, and a sealing ring 3 16 is provided on the sealing ring 19, and the sealing ring 3 16 is sealed and connected with the inner ring body of the swirl generator 2. The swirl generator 2 is also provided with an inner powder inlet pipe 14, one end of the inner powder inlet pipe 14 is connected to the base 41, and the other end of the inner powder inlet pipe 14 is movably connected to the current limiting core 4. The current limiting core 4 is also provided with an inner powder outlet 43, and the inner powder outlet 43 is communicated with the inner powder inlet pipe 14. As a preferred embodiment, the inner wall of the inner powder outlet 43 is hexagonal, which is convenient for disassembly, maintenance and replacement of the current limiting core 4 with an inner hexagon wrench.

[0039] Furthermore, the spray gun 1 includes a diffusion disk 8 and a charge load module. The diffusion disk 8 is used to radiate and spray powder coating in all directions. The diffusion disk 8 is installed at the injection port of the nozzle. The charge load module is arranged on the nozzle and the diffusion disk 8. The charge load module is used to make the sprayed powder coating carry static electricity. The swirl generator 2 includes an inner cup body 10 and an outer cup body 11, and the jet hole 5 is arranged on the cup wall of the inner cup body 10, and a cavity 12 is formed between the inner cup body 10 and the outer cup body 11. The outer cup body 11 is provided with an air pipe interface 40, and the air pipe interface 40 is connected with the cavity 12. The air pipe interface 40 can be arranged at any position on the outer cup body 11. The cavity 12 cooperates with the jet hole 5 to transport gas. Compressed air enters the cavity 12 through the air inlet pipe, and the gas in the cavity 12 enters the inner cup body 10 through the jet hole 5 on the cup wall of the inner cup body 10. When the jet hole 5 sprays compressed air, a high-speed rotating airflow will be generated in the swirl generator 2. When the powder inlet pipe simultaneously inputs powder coating into the inner cup body 10, the powder coating will be subjected to the impact force of the rotating airflow provided by the swirl generator 2, and the powder coating will be dispersed by the rotating airflow, and the powder coating will be dispersed more evenly. The inner cup body 10 is connected with the first-level nozzle 6, and the diameter of the first-level nozzle 6 is larger than the diameter of the inner cup body 10. The flow limiting core 4 is arranged inside the inner cup body 10. When the high-pressure gas is passed into the cavity 12 from the air pipe interface 40 and then ejected through the multiple air injection holes 5, a high-speed rotating airflow is generated in the annular interlayer 45 between the inner cup body 10 and the flow limiting core 4. The high-speed rotating airflow rotates along the inner cup body 10 in a spiral trajectory and enters the first-stage nozzle 6 outward, then continues to enter the second-stage nozzle 7 forward and diffuses forward and outward through the diffusion disk 8. At the same time, the powder coating sprayed from the inner powder outlet 43 is driven by the high-speed rotating airflow flowing out of the swirl generator 2 to rotate at a high speed and be ejected forward and diffused outward through the nozzle and the diffusion disk 8. Due to the existence of the flow limiting core 4, the central part of the tube cavity of the swirl generator 2 is occupied, so that negative pressure cannot be generated in the inner cavity of the swirl generator 2, and the powder coating flowing out through the inner powder outlet 43 and entering the powder tube cannot be sucked into the swirl generator 2, so there will be no problem of accumulation of powder coating in the swirl generator 2.

[0040] In one embodiment of the present disclosure, a grounding wire 44 is also connected to the rear end of the inner cup body 10. The grounding wire 44 is connected to the inner cup body 10 through a hollow screw 46 and a hollow pressure cap 47. After the grounding wire 44 is inserted into the hollow pressure cap 47, the metal sleeve 471 at the tail of the hollow pressure cap 47 is flattened to form a sufficient conductive connection between the grounding wire 44 and the pressure cap. Then the hollow screw 46 and the outer cup body 11 are tightened to the thread four 48. At this time, the pressure cap and the inner cup body 10 are pressed to form a conductive path, so as to conduct away the high-voltage static electricity that can adsorb powder coatings generated by the friction between the swirling gas and the inner cup body 10. The inner cup body 10 and the outer cup body 11 are sealed and connected by a sealing ring 13 and a sealing ring 2 15 to form an annular cavity 12. A sealing ring 2 18 is provided at the rear end of the first-level nozzle 6, and a sealing ring 4 17 is provided between the sealing ring 2 18 and the front end of the inner cup body 10. The steps 21 on the first-stage nozzle 6 and the second-stage nozzle 7 cooperate with each other to connect. After the thread 20 between the second-stage nozzle 7 and the outer cup body 11 is tightened, the connection between the first-stage nozzle 6 and the second-stage nozzle 7 is also relatively firm. At the same time, the connection between the first-stage nozzle 6 and the inner cup body 10 is also relatively firm.

[0041] Please also see Figure 8 As shown, in one embodiment of the present disclosure, the charge load module includes an electrode ring and an electrode needle 23, the electrode needle 23 is installed on the electrode ring, the inner side of the electrode ring is adapted to the outer wall of the diffusion disk 8, the diffusion disk 8 and the electrode ring form a horn shape, and the assembly structure of the electrode ring surrounding the outer periphery of the diffusion disk 8 allows the powder coating sprayed along the inner wall of the diffusion disk 8 to pass through the corona field formed by the electrode ring, so that the powder coating passing through the corona field carries high voltage static electricity and is evenly sprayed and adsorbed to the surface of the sprayed product.

[0042] Please see Figure 1 to Figure 4 , Figure 6 to Figure 13As shown, in one embodiment of the present disclosure, the swirl powder electrostatic spraying device also includes a dust removal mechanism, which includes an air guide ring 24, and the air guide ring 24 includes a dust removal groove 241, an air blowing hole 26, an air duct support body 35, a first air duct 27, an annular pressure cover 28 and an air inlet interface 29. The notch of the dust removal groove 241 faces the front of the nozzle of the spray gun 1, and the electrode needle 23 is at least partially arranged in the dust removal groove 241. The dust removal groove 241 is connected to the diffusion disk 8 on one side close to the diffusion disk 8. The bottom of the dust removal groove 241 is circumferentially provided with a plurality of working holes 34. The electrode needle 23 passes through the working hole 34 and is exposed at the bottom of the dust removal groove 241, so that the electrode needle 23 is arranged circumferentially at the bottom of the dust removal groove 241. A plurality of air holes 25 are also added at the gap between the electrode needle 23 at the bottom of the dust removal groove 241. The air holes 25 and the pinholes of the electrode needle 23 are blown at the same time to prevent the secondary nozzle of the diffusion disk 7; the back side of 8 adsorbs and accumulates powder coating due to the high voltage static electricity close to the electrode needle 23. An airway support body 35 is provided on the outside of the dust removal groove 241, and a plurality of blowing holes 26 are circumferentially provided on the inside of the airway support body 35. A first airway 27 communicating with the blowing holes 26 is provided on the airway support body 35, and an annular gland 28 is provided on the rear of the airway support body 35. A plurality of air inlet pipe interfaces 40 communicating with the first airway 27 are provided on the annular gland 28. A sealing ring 5 37 and a sealing ring 6 38 are also provided on the annular gland 28. The annular gland 28 and the airway support body 35 are sealed and connected after being locked with screws 36. When the air inlet pipe interface 40 is connected to high-pressure gas, the high-pressure gas is blown out from the blowing holes 26 in a timely manner through the first airway 27, and the powder coating adsorbed around the electrode needle 23 at the bottom of the dust removal groove 241 is blown away in time, thereby effectively solving the problem of manual regular cleaning around the electrode needle 23, and improving the automation degree of the spraying assembly line and the working efficiency of automatic spraying.

[0043] Please continue to see Figure 7 to Figure 13 As shown, in one embodiment of the present disclosure, the cyclone powder electrostatic spraying device further includes a spray width regulator 30, which is composed of an airway support body 35, a circumferential airway 32, a spray width regulating hole 31, an annular pressure cover 28 and an air inlet 33. The circumferential airway 32 is arranged in the airway support body 35, and the spray width regulating hole 31 is arranged on the outside of the airway support body 35. The circumferentially arranged spray width regulating holes 31 are generally radially oriented in all directions, and the spray width regulating holes 31 are communicated with the circumferential airway 32. When the air inlet 33 is connected to the high-pressure gas, the high-pressure gas will enter each spray width adjustment hole 31 through the circumferential air duct 32 and blow the high-pressure gas radially to the surroundings through the spray width adjustment holes 31, so as to drive the powder coating radiated by the diffusion disk 8 to continue to diffuse and spray to the surroundings. The amplitude of the spray depends on the pressure of the high-pressure gas sprayed from the spray width adjustment hole 31. The greater the pressure introduced by the air inlet 33, the larger the area of ​​the powder coating radiating outward, and vice versa. In this way, the spray width of the spray gun 1 can be arbitrarily adjusted according to needs.

[0044] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A cyclone powder electrostatic spraying device, characterized in that: The invention comprises a spray gun (1), wherein the spray gun (1) comprises an air inlet pipe, wherein a swirl generator (2) and a nozzle are arranged in the spray gun (1), wherein the swirl generator (2) is connected to the nozzle, wherein the air inlet pipe is connected to the swirl generator (2), wherein the air inlet pipe is used to provide compressed air and an air flow to the swirl generator (2), wherein the spray gun (1) is also provided with a powder inlet pipe, wherein the powder inlet pipe is connected to the swirl generator (2), wherein the powder inlet pipe is used to transport powder coating into the swirl generator (2), wherein the swirl generator (2) is used to evenly rotate and disperse the powder coating, wherein the nozzle is used to transport the powder coating from the swirl generator (2), wherein a limiting flow core (4) is arranged in the swirl generator (2), wherein the limiting flow core (4) is used to limit the movement range of the air flow.

2. The cyclone powder electrostatic spraying device according to claim 1, characterized in that: The swirl generator (2) is a cup-shaped structure. An installation site is provided in the swirl generator (2). The current limiting core (4) is provided with a base (41). The current limiting core (4) is arranged at the installation site through the base (41).

3. The swirl powder electrostatic spraying device according to claim 2, characterized in that: The swirl generator (2) is further provided with an inner powder inlet pipe (14), one end of which is connected to the base (41), and the other end of which is movably connected to the flow limiting core (4), and the flow limiting core (4) is further provided with an inner powder outlet (43), and the inner powder outlet (43) is communicated with the inner powder inlet pipe (14).

4. The cyclone powder electrostatic spraying device according to claim 1, characterized in that: The wall surface of the swirl generator (2) is provided with at least one jet hole (5), and the jet hole (5) is used to introduce air flow into the swirl generator (2).

5. The swirl powder electrostatic spraying device according to claim 4, characterized in that: The swirl generator (2) comprises an inner cup body (10) and an outer cup body (11), the jet hole (5) is arranged on the cup wall of the inner cup body (10), and the flow limiting core (4) is arranged inside the inner cup body (10).

6. The cyclone powder electrostatic spraying device according to claim 1, characterized in that: The nozzle comprises a primary nozzle (6) and a secondary nozzle, the two ends of the primary nozzle (6) are respectively connected to the swirl generator (2) and the secondary nozzle, and the diameter of the secondary nozzle is larger than the diameter of the primary nozzle (6).

7. The cyclone powder electrostatic spraying device according to claim 1, characterized in that: The spray gun (1) comprises a diffusion disk (8) and a charge load module, wherein the diffusion disk (8) is used to radiate and spray powder coating in all directions, the diffusion disk (8) is installed at the spray port of a nozzle, the charge load module is arranged on the nozzle and the diffusion disk (8), and the charge load module is used to make the sprayed powder coating have static electricity; the charge load module comprises an electrode ring and an electrode needle (23), and the electrode needle (23) is installed on the electrode ring.

8. The swirl powder electrostatic spraying device according to claim 7, characterized in that: The invention also comprises a dust removal mechanism, wherein the dust removal mechanism comprises an air guide ring (24), the air guide ring (24) comprises a dust removal groove (241), the notch of the dust removal groove (241) faces the front of the nozzle of the spray gun (1), and the electrode needle (23) is at least partially arranged in the dust removal groove (241).

9. The swirl powder electrostatic spraying device according to claim 8, characterized in that: The bottom of the dust removal groove (241) is provided with a plurality of working holes (34) matching the electrode needles (23), and the electrode needles (23) pass through the working holes (34); and the outer side of the dust removal groove (241) is also provided with a plurality of blowing holes (26).

10. The cyclone powder electrostatic spraying device according to claim 1, characterized in that: The invention also comprises a spray width regulator (30), wherein the spray width regulator (30) comprises an airway support body (35), a circumferential airway (32) and a spray width regulating hole (31), wherein the circumferential airway (32) is arranged inside the airway support body (35), and the spray width regulating hole (31) is arranged outside the airway support body (35), and the spray width regulating hole (31) is communicated with the circumferential airway (32).

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