Electrostatic powder spinning cup spray gun

Abstract

The application relates to an electrostatic powder rotary cup spray gun, which is characterized in that the technical scheme comprises the following parts: a shell, a feeding assembly for feeding powder coating, a discharging assembly for receiving the coating fed by the feeding assembly and spraying the coating, a pneumatic assembly for driving the discharging assembly to rotate at high speed, a gas feeding assembly for feeding compressed gas for driving the pneumatic assembly to move, and an electrostatic high-voltage assembly for charging the coating sprayed by the discharging assembly; the application can realize uniform spraying, effectively save powder coating, and has good cooling effect during spraying, thereby prolonging the service life of products.

Description

Technical Field

[0001] This invention relates to the field of powder spray gun equipment technology, and more specifically, to an electrostatic powder rotary cup spray gun. Background Technology

[0002] Electrostatic powder spray guns are commonly used tools in electrostatic coating processes. They are mainly used to generate static electricity and spray powder onto the workpiece to be coated. However, existing traditional electrostatic powder spray guns on the market have problems such as uneven powder spraying, resulting in uneven coating after product coating, low powder utilization rate during spraying, serious powder waste during spraying, and inability to control the spray width according to actual application conditions. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an electrostatic powder rotary cup spray gun. This gun utilizes a pneumatic motor with controllable rotation speed to drive the rotary cup at high speed. The centrifugal force generated by the high-speed rotation of the rotary cup allows the powder coating to achieve extreme uniformity. Furthermore, an electrostatic high-voltage conductive component uniformly charges the powder coating, thus solving the problems of uneven powder coating, uneven coating after spraying, low powder utilization, significant powder waste during spraying, and inability to control the spray width according to actual application conditions in existing traditional electrostatic powder spray guns.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an electrostatic powder rotary cup spray gun, comprising: a housing, a feeding assembly for conveying powder coating, a discharging assembly for receiving the coating conveyed by the feeding assembly and spraying it out, a pneumatic assembly for driving the discharging assembly to rotate at high speed, a gas supply assembly for conveying compressed gas to drive the pneumatic assembly, and an electrostatic high-voltage assembly for charging the coating sprayed by the discharging assembly; the pneumatic assembly is detachably disposed within the housing; the input end of the gas supply assembly passes through one end of the housing and is connected to a pipeline for conveying compressed gas; the output end of the gas supply assembly is connected to the input end of the pneumatic assembly; the pneumatic assembly... The first output terminal is connected to the housing; the second output terminal of the pneumatic component is fixedly connected to the discharge component; the input terminal of the discharge component is connected to the output terminal of the conveying component; the output terminal of the discharge component passes through the other end of the housing and is placed outside the housing; the input terminal of the conveying component passes through the pneumatic component and the end of the housing near the input terminal of the air conveying component in sequence, and is connected to the conveying pipeline for conveying powder coating; one end of the electrostatic high voltage component is disposed on the housing near the input terminal of the air conveying component and is plugged into the charging socket; the other end of the electrostatic high voltage component passes through the housing and is detachably connected to the pneumatic component; the electrostatic high voltage component is electrically connected to the discharge component.

[0005] Optionally, the pneumatic assembly includes: a mounting housing, a first turbine, a second turbine, a first bearing, an aluminum shaft, a second bearing, a lock nut, an exhaust guide cover, and a bearing clamping nut; the mounting housing is electrically connected to the electrostatic high-voltage assembly; the mounting housing is detachably disposed within the housing; one end of the aluminum shaft is disposed within the mounting housing and threadedly connected to the lock nut, and is fixedly connected to the inner walls of the first turbine, the second turbine, the first bearing, and the second bearing, respectively; the aluminum shaft has a plurality of guide holes communicating with the mounting housing; the material conveying assembly passes through the aluminum shaft and communicates with the material discharging assembly; the first bearing is disposed within the mounting housing, and its outer wall is fixedly connected to the inner wall of the mounting housing; the first turbine is rotatably disposed within the mounting housing and located on one side of the first bearing; the lock nut is disposed on the side of the first turbine away from the first bearing; the guide holes are located on the side of the first bearing away from the first turbine; the second turbine is rotatably disposed within the mounting housing. The second bearing is located inside the mounting housing and on the other side of the first bearing; the second bearing is located inside the mounting housing and on the side of the second turbine away from the first turbine; the inner wall of the second bearing is fixedly connected to the inner wall of the mounting housing; the bearing clamping nut is located on the side of the second bearing away from the second turbine and is threadedly connected to the mounting housing; the exhaust guide cover is detachably connected to the mounting housing; the exhaust guide cover has a plurality of exhaust holes; the mounting housing has a plurality of first through holes that correspond one-to-one with the plurality of exhaust holes; the two ends of the mounting housing are respectively provided with a first sealing ring and a second sealing ring; a plurality of second through holes and third through holes are provided on the mounting housing and in the gap between the first sealing ring and the second sealing ring; one end of the second through hole is connected to the output end of the gas transmission assembly, and the other end is connected to the mounting housing and faces the first turbine; one end of the third through hole is connected to the output end of the gas transmission assembly, and the other end is connected to the mounting housing and faces the second turbine.

[0006] Optionally, the discharge assembly includes: a connector, a rotating cup protector, a flow guide for guiding the powder coating, several copper pillars, an insulating sheet, a conductive aluminum sheet, and several screws; the connector is located at one end of the rotating cup protector and communicates with it; one end of the connector is detachably connected to the other end of the aluminum shaft and communicates with the material conveying assembly; the other end of the rotating cup protector passes through the housing and is located outside the housing; the flow guide is located at the discharge port at the end of the rotating cup protector located outside the housing; the flow guide has several fourth through holes adapted to the copper pillars; the copper pillars are correspondingly located in the through holes; the conductive aluminum sheet is located at the end of the flow guide away from the rotating cup protector; the insulating sheet is located at the end of the conductive aluminum sheet away from the flow guide; the screws pass through the insulating sheet, the conductive aluminum sheet, the copper pillars, and the rotating cup protector in sequence and are threadedly connected to the other side of the connector; the copper pillars and the conductive aluminum sheet are electrically connected to the electrostatic high-voltage assembly.

[0007] Optionally, the electrostatic high-voltage assembly includes: a connector for compatibility with a control cable, an electrostatic high-voltage module, a conductive copper sheet, a conductive spring, and a conductive post; the electrostatic high-voltage module, conductive spring, conductive copper sheet, and conductive post are all disposed within the housing; one end of the connector is inserted into the control cable, and the other end passes through the housing and is detachably connected to one end of the electrostatic high-voltage module; the conductive copper sheet is fixedly connected to the other end of the electrostatic high-voltage module; one end of the conductive spring is fixedly connected to the conductive copper sheet, and the other end is fixedly connected to the conductive post; the conductive post is detachably connected to the mounting housing; and the conductive post is electrically connected to the copper post and the conductive aluminum sheet.

[0008] Optionally, the gas delivery assembly includes: a first gas pipe connector for communicating with a gas delivery pipeline for delivering compressed gas, and a first inner gas pipe; the inner gas pipe is disposed inside the housing; one end of the first gas pipe connector is connected to the gas delivery pipeline, and the other end passes through the housing and is connected to the input end of the first inner gas pipe; the output end of the first inner gas pipe is connected to the second through hole and the third through hole respectively.

[0009] Optionally, the material conveying assembly includes: a material pipe connector for communicating with a material conveying pipeline for conveying powder coating, and an inner material pipe; the inner material pipe is disposed inside the housing; one end of the material pipe connector is connected to the material conveying pipeline, and the other end passes through the housing and the aluminum shaft in sequence and is connected to the connector.

[0010] Optionally, it also includes a pressure-maintaining component for maintaining stable internal air pressure; the pressure-maintaining component includes: a second air pipe connector and a second inner air pipe; one end of the second air pipe connector passes through the end of the housing near the first air pipe connector and can be connected to the air supply line; the other end of the second air pipe connector is disposed inside the housing and is connected to the second inner air pipe; the output end of the second inner air pipe is connected to the housing.

[0011] Optionally, at least one spare auxiliary air supply connector for communicating with the exhaust port is also provided on the end of the housing near the first air pipe connector.

[0012] Optionally, a plurality of fifth through holes are provided on the housing near the end of the rotating cup guard; the plurality of fifth through holes are arranged at equal intervals around the end of the rotating cup guard located outside the housing; a forming gas connector is provided on the end of the housing away from the rotating cup guard, and the forming gas connector communicates with the fifth through holes.

[0013] In summary, the present invention has the following beneficial effects: by utilizing a dual-turbine pneumatic assembly, lower-pressure compressed gas can be used for driving operation, reducing energy consumption; by effectively utilizing the drive exhaust (exhaust gas) to effectively cool the bearing, a separate compressed gas cooling system is not required, greatly reducing energy consumption and improving bearing life; the forming gas connector for controlling the spray width allows for control of the spray width according to the actual spraying situation; the guide vane with guide cone and guide vane allows for more uniform spraying by the rotary cup spray gun, effectively saving powder coating and improving the surface quality of the coating. Attached Figure Description

[0014] Figure 1 This is an assembly drawing of the present invention; Figure 2 This is an assembly drawing of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram showing the positional relationship of the various components in this invention; Figure 5 This is a schematic diagram showing the positional relationship between the pneumatic component and the discharge component in this invention; Figure 6 This is a schematic diagram of the structural relationship of the discharge component in this invention; Figure 7 This is a cross-sectional view of the pneumatic component in this invention; Figure 8 This is a schematic diagram of the structural relationship of the pneumatic components in this invention; Figure 9 This is a schematic diagram of the structural relationship of the electrostatic high voltage component in this invention; Figure 10 This is a schematic diagram of the structure of the current guide in this invention; Figure 11 This is a schematic diagram of the structure of the airflow guide and exhaust cover in this invention.

[0015] In the diagram: 1. Housing; 1001. Locking cap; 1002. Housing body; 2. Conveying assembly; 21. Material pipe connector; 22. Inner material pipe; 3. Discharge assembly; 31. Connector; 32. Rotary cup guard; 33. Guide tube; 34. Copper pillar; 35. Insulating sheet; 36. Conductive aluminum sheet; 37. Screw; 4. Pneumatic assembly; 41. Mounting shell; 42. First turbine; 43. Second turbine; 44. First bearing; 45. Aluminum shaft; 46. Second bearing; 47. Locking nut; 48. Exhaust guide cover; 49. Bearing clamping screw 5. Gas supply assembly; 51. First gas pipe connector; 52. First inner gas pipe; 6. Electrostatic high voltage assembly; 61. Connector connector; 62. Electrostatic high voltage module; 63. Conductive copper sheet; 64. Conductive spring; 65. Conductive column; 7. Exhaust port; 8. Backup auxiliary gas supply connector; 9. Pressure holding assembly; 91. Second gas pipe connector; 92. Second inner gas pipe; 10. Fifth through hole; 11. Molded gas connector; 12. First sealing ring; 13. Second sealing ring; 14. Second through hole; 15. Third through hole; 16. Guide hole. Detailed Implementation

[0016] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0017] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0018] In this invention, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] This invention provides an electrostatic powder rotary cup spray gun, such as... Figure 1 As shown, it includes: a housing 1; a conveying assembly 2 for conveying powder coating; a discharging assembly 3 for receiving the coating conveyed by the conveying assembly 2 and spraying it out; a pneumatic assembly 4 for driving the discharging assembly 3 to rotate at high speed; a gas supply assembly 5 for conveying compressed gas to drive the pneumatic assembly 4; and an electrostatic high-voltage assembly 6 for charging the coating sprayed out by the discharging assembly 3; the pneumatic assembly 4 is detachably disposed within the housing 1; the input end of the gas supply assembly 5 passes through one end of the housing 1 and is connected to a pipeline for conveying compressed gas; the output end of the gas supply assembly 5 is connected to the input end of the pneumatic assembly 4; the first output end of the pneumatic assembly 4 is connected to the housing 1; the gas supply assembly 5... The second output end of the actuating component 4 is fixedly connected to the discharge component 3; the input end of the discharge component 3 is connected to the output end of the conveying component 2; the output end of the discharge component 3 passes through the other end of the housing 1 and is placed outside the housing 1; the input end of the conveying component 2 passes through the pneumatic component 4 and the end of the housing 1 near the input end of the air conveying component 5 in sequence, and is connected to the conveying pipeline for conveying powder coating; one end of the electrostatic high voltage component 6 is located on the housing 1 near the input end of the air conveying component 5 and is plugged into the control cable; the other end of the electrostatic high voltage component 6 passes through the housing 1 and is detachably connected to the pneumatic component; the electrostatic high voltage component 6 is electrically connected to the discharge component 3.

[0021] In this embodiment, as Figure 1-4As shown; the housing 1 is composed of a locking cap 1001 and a housing body 1002 for the user to hold, and the pneumatic component 4 is a pneumatic motor; in use, the rotary cup spray gun is started. At this time, the air supply component 5 is connected to the air supply pipeline, and the compressed gas in the air supply pipeline is delivered to the pneumatic component 4. The pressure energy of the compressed gas drives the pneumatic component 4 to rotate at high speed, thereby driving the material discharge component 3 fixedly connected to it to rotate; while the material discharge component 3 is rotating, the material supply component 2 is connected to the material supply pipeline and delivers the powder coating to the material discharge component 3, so that the powder coating is rotated and sprayed out under the drive of the material discharge component 3; during the powder coating spraying process, the electrostatic high voltage component 6 is energized to charge the sprayed powder coating, completing the powder coating spraying work; the overall operation is convenient and quick, with strong stability and uniform powder spraying.

[0022] Further, the pneumatic assembly 4 includes: a mounting housing 41, a first turbine 42, a second turbine 43, a first bearing 44, an aluminum shaft 45, a second bearing 46, a locking nut 47, an exhaust guide cover 48, and a bearing clamping nut 49; the mounting housing 41 is electrically connected to the electrostatic high-voltage assembly 6; the mounting housing 41 is detachably disposed within the housing 1; one end of the aluminum shaft 45 is disposed within the mounting housing 41 and threadedly connected to the locking nut 47, and is fixedly connected to the inner walls of the first turbine 42, the second turbine 43, the first bearing 44, and the second bearing 46, respectively; The aluminum shaft 45 has several guide holes 16 communicating with the mounting housing 41; the material conveying assembly 2 passes through the aluminum shaft 45 and communicates with the discharge assembly 3; the first bearing 44 is disposed inside the mounting housing 41, and its outer wall is fixedly connected to the inner wall of the mounting housing 41; the first turbine 42 is rotatably disposed inside the mounting housing 41 and is located on one side of the first bearing 44; the locking nut 47 is disposed on the side of the first turbine away from the first bearing 44; the guide holes 16 are located on the side of the first bearing 44 away from the first turbine 42; the second turbine 43 is rotatably disposed... The second bearing 46 is disposed within the mounting housing 41 and on the other side of the first bearing 44; the second bearing 46 is disposed within the mounting housing 41 and located on the side of the second turbine 43 away from the first turbine 42; the inner wall of the second bearing 46 is fixedly connected to the inner wall of the mounting housing 41; the bearing clamping nut 49 is located on the side of the second bearing 46 away from the second turbine 43 and is threadedly connected to the mounting housing 41; the exhaust guide cover 48 is detachably connected to the mounting housing; the exhaust guide cover 48 has a plurality of exhaust holes 7; the mounting housing 41 has a plurality of exhaust holes 7. The air vent 7 corresponds one-to-one with the first through hole; the two ends of the mounting shell 41 are respectively provided with a first sealing ring 12 and a second sealing ring 13; a plurality of second through holes 14 and third through holes 15 are opened on the mounting shell 41 and in the gap between the first sealing ring 12 and the second sealing ring 13; one end of the second through hole 14 is connected to the output end of the air supply component 5, and the other end is connected to the mounting shell 41 and faces the first turbine 42; one end of the third through hole 15 is connected to the output end of the air supply component 5, and the other end is connected to the mounting shell 41 and faces the second turbine 43.

[0023] In this embodiment, as Figure 1-8 and Figure 11As shown, the pneumatic assembly 4 is a pneumatic motor with a dual-turbine design of varying sizes. The first bearing 44 and the second bearing 46 are both deep groove ball bearings. The size of the first bearing 44 is smaller than that of the second bearing 46, and the size of the first turbine 42 is larger than that of the second turbine 43. The aluminum shaft 45 is a tubular shaft. During assembly, the first bearing 44 is positioned on the side of the first turbine 42 closer to the second turbine 43, and the second bearing 46 is positioned on the side of the second turbine 43 furthest from the first turbine 42. The first bearing 44, the second bearing 46, the first turbine 42, and the second turbine 43 are all fixedly connected to one end of the aluminum shaft 45 located within the mounting housing 41, and are securely installed within the mounting housing 41 by a locking nut 47 and a bearing clamping nut 49. During operation, compressed gas is transported through the gas delivery assembly 5 and delivered into the mounting housing 41 via the second through hole 14 and the third through hole 15. The compressed gas drives the first turbine 42 and the second turbine 43 inside the mounting housing 41 to rotate at high speed simultaneously, converting pressure energy into mechanical energy, which in turn drives the aluminum shaft 45 to rotate. The rotation of the aluminum shaft 45 drives the discharge assembly 3 to rotate, resulting in more uniform spraying. During operation, after the compressed gas enters the mounting housing 41 through the second through hole 14 and the third through hole 15 to drive the first turbine 42 and the second turbine 43, the compressed gas changes from driving gas to exhaust gas, which can be recycled. The exhaust gas from the first turbine 42, after driving the first turbine 42, passes through the first bearing. After passing through the guide hole 16 on one side of the first bearing 44, the exhaust gas enters the gap between the aluminum shaft 45 and the conveying assembly 2, and finally exits around the discharge assembly 3. During this process, the exhaust gas not only cools the first bearing 44, but also further diffuses the paint sprayed from the discharge assembly 3, further improving the uniformity of the powder coating. The exhaust gas from the second turbine 43 passes through the second bearing 46 and finally exits through the exhaust hole 7 of the exhaust guide cover 48 installed on one side of the mounting housing 41. During this process, the exhaust gas not only cools the second bearing 46, but also, because the exhaust guide cover 48 is close to the discharge assembly 3, it can also cool the discharge assembly 3 during the exhaust process. The gap between the housing 1 and the spray gun is protected by positive pressure to prevent powder coating from entering the spray gun during spraying and affecting its use. Inside the mounting housing 41, two bearings of different sizes are installed on the aluminum shaft 45 according to the different radial forces it experiences during rotation. This ensures that the aluminum shaft 45 can rotate while maintaining consistent service life between the bearings, thus extending the product's lifespan. The use of a dual-turbine drive allows the aluminum shaft 45 to rotate at high speed using compressed gas with a lower pressure than conventional compressed gas, reducing energy consumption. It also avoids the resonance problems during motor start-up and rotation caused by radial force imbalance and energy conversion lag in existing single-turbine drives, resulting in smoother motor operation.

[0024] Further, the discharge assembly 3 includes: a connector 31, a rotary cup protector 32, a flow guide 33 for guiding the powder coating, several copper pillars 34, an insulating sheet 35, a conductive aluminum sheet 36, and several screws 37; the connector 31 is disposed at one end of the rotary cup protector 32 and communicates with the rotary cup protector 32; one end of the connector 31 is detachably connected to the other end of the aluminum shaft 45 and communicates with the material conveying assembly 2; the other end of the rotary cup protector 32 passes through the housing 1 and is placed outside the housing 1; the flow guide 33 is disposed on the rotary cup protector 32 and placed on the housing 1. At the discharge port at one end of the outer side; the guide 33 is provided with several fourth through holes adapted to the copper pillars 34; the copper pillars 34 are respectively arranged in the through holes; the conductive aluminum sheet 36 is arranged at the end of the guide 33 away from the rotating cup cup 32; the insulating sheet 35 is arranged at the end of the conductive aluminum sheet 36 away from the guide 33; several screws pass through the insulating sheet 35, the conductive aluminum sheet 36, the copper pillars 34 and the rotating cup cup 32 in sequence and are threaded to the other side of the connector 31; the copper pillars 34 and the conductive aluminum sheet 36 are electrically connected to the electrostatic high voltage component 6.

[0025] In this embodiment, as Figure 3-6 and Figure 10As shown; the guide 33 is a guide 33 with a guide cone and a guide plate; during assembly, firstly, one end of the connector 31 is fixedly connected to the aluminum shaft 45 and connected to the material conveying assembly 2 inside the aluminum shaft 45; then, the connector 31, the rotating cup 32, the guide 33, the copper pillar 34, the insulating plate 35, and the conductive aluminum plate 36 are connected in series and fixed together using screws; during operation, the powder coating is conveyed from the material conveying assembly 2 to the connector 31, and then conveyed from the connector 31 to the position of the guide 33. Under the action of the guide cone on the guide 33, the powder... The coating is uniformly guided around the guide cone 33; while the guide cone 33 guides the powder, the aluminum shaft 45 drives the entire discharge assembly 3 to rotate at high speed. After being guided by the guide cone, the powder coating is dispersed very evenly and sprayed out along the periphery of the conductive aluminum sheet 36 under the action of the guide blades on the guide cone 33 and the centrifugal force of the high-speed rotation; during the spraying process, the electrostatic high voltage component 6 is energized, causing the copper pillar 34 and the conductive aluminum sheet 36 on one side of the guide cone 33 to become charged, thereby realizing the charging operation of the powder coating and completing the discharge assembly 3. The spraying operation utilizes the simultaneous high-speed rotation of the discharge assembly 3 by the aluminum shaft 45 driving the powder discharge component 3 while the powder is guided by the guide cone. This allows the powder coating, after being guided by the guide cone, to achieve the ultimate uniformity sought in electrostatic powder spraying—a coating uniformity of ±5 micrometers—under the action of the guide blades on the guide cone 33 and the centrifugal force of the high-speed rotation. This significantly saves powder coating and improves the surface quality of the coating. A rotating cup 32 is installed between the guide cone 33 and the connector 31 to converge the powder spray pattern, thereby… To achieve the goal of controlling the spray width and increasing the spray distance, different diameters of the guide tube 33 and the protective cup can obtain different spray widths and spray distances to meet different production requirements. A nylon insulating sheet 35 is set on one side of the conductive aluminum sheet 36. During operation, the conductive aluminum sheet 36 can discharge only at the edge to ensure the discharge energy and fully charge the powder coating, thereby improving the powder coating application rate during spraying. At the same time, it can reduce the cleaning and color change time during spraying. Because the nylon insulating sheet 35 is not static-charged, the powder coating does not adhere to the nylon insulating sheet 35 and is easy to clean.

[0026] Further, the electrostatic high-voltage assembly 6 includes: a connector 61 adapted to the control cable, an electrostatic high-voltage module 62, a conductive copper sheet 63, a conductive spring 64, and a conductive post 65; the electrostatic high-voltage module 62, the conductive spring 64, the conductive copper sheet 63, and the conductive post 65 are all disposed within the housing 1; one end of the connector 61 is inserted into the control cable, and the other end passes through the housing 1 and is detachably connected to one end of the electrostatic high-voltage module; the conductive copper sheet 63 is fixedly connected to the other end of the electrostatic high-voltage module 62; one end of the conductive spring 64 is fixedly connected to the conductive copper sheet 63, and the other end is fixedly connected to the conductive post 65; the conductive post 65 is detachably connected to the mounting shell 41; the conductive post 65 is electrically connected to the copper post 34 and the conductive aluminum sheet 36.

[0027] In this embodiment, as Figure 3 , Figure 4 and Figure 6 As shown, the electrostatic high voltage module 62 is installed inside the housing 1. During operation, the control cable is plugged into the connector 61 to energize the system. The high voltage electrostatic module releases high voltage static electricity to the conductive copper sheet 63, and then conducts it through the conductive spring 64 and the conductive post 65 to the conductive aluminum sheet 36 and the copper post 34 on the discharge assembly 3, thereby realizing the charging operation of the powder coating. The overall structure is simple and easy to install.

[0028] Furthermore, the gas delivery assembly 5 includes: a first gas pipe connector 51 for communicating with a gas delivery pipeline for delivering compressed gas, and a first inner gas pipe 52; the inner gas pipe is disposed inside the housing 1; one end of the first gas pipe connector 51 is connected to the gas delivery pipeline, and the other end passes through the housing 1 and is connected to the input end of the first inner gas pipe 52; the output end of the first inner gas pipe 52 is connected to the second through hole 14 and the third through hole 15 respectively.

[0029] In this embodiment, as Figure 1-4 As shown, the first inner air pipe 52 is installed inside the housing 1 and is connected to the external air supply pipeline through the first air pipe connector 51. During operation, compressed gas passes through the first air pipe connector 51 and the first inner air pipe 52, and is finally delivered to the pneumatic assembly 4 by the first inner air pipe 52. The structure is stable and the installation is convenient and quick.

[0030] Furthermore, the material conveying assembly 2 includes: a material pipe connector 21 for communicating with a material conveying pipeline for conveying powder coating, and an inner material pipe 22; the inner material pipe 22 is disposed inside the housing 1; one end of the material pipe connector 21 is connected to the material conveying pipeline, and the other end passes through the housing 1 and the aluminum shaft 45 in sequence and is connected to the connector 31.

[0031] In this embodiment, as Figure 2-4As shown, the material pipe structure can be directly connected to an external conveying pipeline for conveying powder coatings. The powder coatings are conveyed in through the material pipe joint 21, conveyed to the discharge assembly 3 through the inner material pipe 22, and finally sprayed out by the discharge assembly 3. The structure is stable and easy to install.

[0032] Furthermore, it also includes a pressure-maintaining component 9 for maintaining stable air pressure inside the housing 1; the pressure-maintaining component 9 includes: a second air pipe connector 91 and a second inner air pipe 92; one end of the second air pipe connector 91 passes through the end of the housing near the first air pipe connector 51 and can be connected to the air supply pipeline; the other end of the second air pipe connector 91 is disposed inside the housing 1 and is connected to the second inner air pipe 92; the output end of the second inner air pipe 92 is connected to the housing 1.

[0033] In this embodiment, as Figure 2 and 4 As shown, when the rotary cup electrostatic spray gun is working, a thin layer of powder coating will be adsorbed on the flat surface of the discharge port of the discharge component 3. After the spraying is completed, it needs to be cleaned with compressed gas. During cleaning, the second air pipe connector 91 is connected to the external air supply pipeline for delivering compressed gas, and the compressed gas is input into the housing 1 through the second inner air pipe 92 to maintain the pressure inside the housing 1, so as to ensure that the powder coating does not enter the interior of the rotary cup electrostatic spray gun housing 1 during cleaning, thus ensuring that the interior is clean and that the dual turbine pneumatic component 4 does not enter the powder coating.

[0034] Furthermore, at least one spare auxiliary air supply connector 8 for communicating with the exhaust port 7 is also provided on the end of the housing 1 near the first air pipe connector 51.

[0035] In this embodiment, as Figure 2 As shown, the backup auxiliary gas supply connector 8 can be directly connected to an external gas supply pipeline for supplying compressed gas. The backup auxiliary gas supply connector 8 is mainly set up so that when a small amount of driving gas is required due to production conditions and the positive pressure protection force generated by the exhaust gas from the small turbine is insufficient, a compressed gas supply line can be connected to the backup auxiliary gas supply connector 8 to maintain pressure and prevent powder coating from entering the interior of the rotary cup spray gun during the spraying process.

[0036] Furthermore, a plurality of fifth through holes 10 are provided on the housing 1 near the end of the rotating cup protector 32; the plurality of fifth through holes 10 are arranged at equal intervals around the end of the rotating cup protector 32 located outside the housing 1; a forming gas connector 11 is provided on the end of the housing 1 away from the rotating cup protector 32, and the forming gas connector 11 communicates with the fifth through holes.

[0037] In this embodiment, as Figure 1-3 and Figure 4As shown, a forming gas connector 11 connected to several fifth through holes 10 on the housing 1 is mainly used to further reduce the spray width of the large powder output when a large amount of powder is required during the production process. This is achieved by using the compressed gas supplied by the forming gas connector 11 connected to an external compressor to ensure the quality of the coating and reduce the waste of powder coating. By using a guide cone and a guide blade to guide the powder coating, powder coating is effectively saved and the surface quality of the coating is improved.

[0038] This invention discloses an electrostatic powder rotary cup spray gun. By utilizing a dual-turbine pneumatic motor, it can be driven by compressed gas with lower pressure, reducing energy consumption. By effectively cooling the bearings using the exhaust gas from the drive, it eliminates the need for a separate compressed gas cooling system, significantly reducing energy consumption and extending the bearing's service life. A forming air connector 11 is provided to control the spray width, allowing for adjustment of the spray width based on actual spraying conditions. A guide vane 33 with a guide cone and guide plate ensures more uniform spraying, effectively saving powder coating material and improving the surface quality of the coating.

[0039] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An electrostatic powder rotary cup spray gun, characterized in that, include: The package includes a housing, a feeding assembly for conveying powder coating, a discharging assembly for receiving the coating conveyed by the feeding assembly and spraying it out, a pneumatic assembly for driving the discharging assembly to rotate at high speed, a gas supply assembly for conveying compressed gas that drives the pneumatic assembly to move, and an electrostatic high-voltage assembly for charging the coating sprayed out by the discharging assembly. The pneumatic assembly is detachably disposed within the housing; the input end of the gas delivery assembly passes through one end of the housing and is connected to a pipeline for delivering compressed gas; the output end of the gas delivery assembly is connected to the input end of the pneumatic assembly; the first output end of the pneumatic assembly is connected to the housing; the second output end of the pneumatic assembly is fixedly connected to the discharge assembly; the input end of the discharge assembly is connected to the output end of the discharge assembly; the output end of the discharge assembly passes through the other end of the housing and is located outside the housing; the input end of the discharge assembly passes sequentially through the pneumatic assembly and one end of the housing near the input end of the gas delivery assembly, and is connected to a pipeline for conveying powder coating; one end of the electrostatic high-voltage assembly is disposed on the housing near the input end of the gas delivery assembly and is plugged into a control cable; the other end of the electrostatic high-voltage assembly passes through the housing and is detachably connected to the pneumatic assembly; the electrostatic high-voltage assembly is electrically connected to the discharge assembly. The pneumatic assembly includes: a mounting housing, a first turbine, a second turbine, a first bearing, an aluminum shaft, a second bearing, a lock nut, an exhaust guide cover, and a bearing clamping nut; the mounting housing is electrically connected to the electrostatic high-voltage assembly; the mounting housing is detachably disposed within the housing; one end of the aluminum shaft is disposed within the mounting housing and threadedly connected to the lock nut, and is fixedly connected to the inner wall of the first turbine, the inner wall of the second turbine, the inner wall of the first bearing, and the inner wall of the second bearing, respectively; The aluminum shaft has several guide holes communicating with the mounting housing; the material conveying assembly passes through the aluminum shaft and communicates with the material discharging assembly; the first bearing is disposed inside the mounting housing, and its outer wall is fixedly connected to the inner wall of the mounting housing; the first turbine is rotatably disposed inside the mounting housing and located on one side of the first bearing; the locking nut is disposed on the side of the first turbine away from the first bearing; the guide hole is located on the side of the first bearing away from the first turbine; the second turbine is rotatably disposed inside the mounting housing and on the other side of the first bearing; the second bearing is disposed inside the mounting housing and located on the side of the second turbine away from the first turbine; the inner wall of the second bearing is fixedly connected to the inner wall of the mounting housing; the bearing clamping nut is located on the side of the second bearing away from the second turbine and is threadedly connected to the mounting housing; the exhaust guide cover is detachably connected to the mounting housing; the exhaust guide cover has several exhaust holes; the mounting housing has several first through holes that correspond one-to-one with the exhaust holes; The mounting housing is provided with a first sealing ring and a second sealing ring at both ends respectively; a plurality of second through holes and third through holes are provided on the mounting housing and in the gap between the first sealing ring and the second sealing ring; one end of the second through hole is connected to the output end of the gas transmission assembly, and the other end is connected to the mounting housing and faces the first turbine; one end of the third through hole is connected to the output end of the gas transmission assembly, and the other end is connected to the mounting housing and faces the second turbine.

2. The electrostatic powder rotary cup spray gun according to claim 1, characterized in that, The discharge assembly includes: a connector, a rotating cup protector, a flow guide for guiding the powder coating, several copper pillars, an insulating sheet, a conductive aluminum sheet, and several screws; the connector is located at one end of the rotating cup protector and communicates with it; one end of the connector is detachably connected to the other end of the aluminum shaft and communicates with the material conveying assembly; the other end of the rotating cup protector passes through the housing and is located outside the housing; the flow guide is located at the discharge port at the end of the rotating cup protector located outside the housing; the flow guide has several fourth through holes adapted to the copper pillars; the copper pillars are correspondingly located in the through holes; the conductive aluminum sheet is located at the end of the flow guide away from the rotating cup protector; the insulating sheet is located at the end of the conductive aluminum sheet away from the flow guide; the screws pass sequentially through the insulating sheet, the conductive aluminum sheet, the copper pillars, and the rotating cup protector and are threaded to the other side of the connector; the copper pillars and the conductive aluminum sheet are electrically connected to the electrostatic high-voltage assembly.

3. The electrostatic powder rotary cup spray gun according to claim 2, characterized in that, The electrostatic high-voltage assembly includes: a connector for compatibility with a control cable, an electrostatic high-voltage module, a conductive copper sheet, a conductive spring, and a conductive post; the electrostatic high-voltage module, conductive spring, conductive copper sheet, and conductive post are all disposed within the housing; one end of the connector is connected to the control cable, and the other end passes through the housing and is detachably connected to one end of the electrostatic high-voltage module; the conductive copper sheet is fixedly connected to the other end of the electrostatic high-voltage module; one end of the conductive spring is fixedly connected to the conductive copper sheet, and the other end is fixedly connected to the conductive post; the conductive post is detachably connected to the mounting housing; and the conductive post is electrically connected to the copper post and the conductive aluminum sheet.

4. The electrostatic powder rotary cup spray gun according to claim 1, characterized in that, The gas delivery assembly includes: a first gas pipe connector for communicating with a gas delivery pipeline for delivering compressed gas, and a first inner gas pipe; the inner gas pipe is disposed inside the housing; one end of the first gas pipe connector is connected to the gas delivery pipeline, and the other end passes through the housing and is connected to the input end of the first inner gas pipe; the output end of the first inner gas pipe is connected to the second through hole and the third through hole respectively.

5. The electrostatic powder rotary cup spray gun according to claim 2, characterized in that, The material conveying assembly includes: a material pipe connector for communicating with a material conveying pipeline for conveying powder coating, and an inner material pipe; the inner material pipe is disposed inside the housing; one end of the material pipe connector is connected to the material conveying pipeline, and the other end passes through the housing and the aluminum shaft in sequence and is connected to the connector.

6. The electrostatic powder rotary cup spray gun according to claim 4, characterized in that, It also includes a pressure-maintaining component for maintaining stable air pressure inside the housing; the pressure-maintaining component includes: a second air pipe connector and a second inner air pipe; one end of the second air pipe connector passes through the housing near the end of the first air pipe connector and can be connected to the air supply pipeline; the other end of the second air pipe connector is disposed inside the housing and is connected to the second inner air pipe; the output end of the second inner air pipe is connected to the housing.

7. An electrostatic powder rotary cup spray gun according to claim 4, characterized in that, At least one spare auxiliary air supply connector for communicating with the exhaust port is also provided on the end of the housing near the first air pipe connector.

8. An electrostatic powder rotary cup spray gun according to claim 2, characterized in that, A plurality of fifth through holes are provided on the housing near the end of the rotating cup guard; the plurality of fifth through holes are arranged at equal intervals around the end of the rotating cup guard located outside the housing; a forming gas connector is provided on the end of the housing away from the rotating cup guard, and the forming gas connector communicates with the fifth through holes.

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