Static rotary cup spray gun

Abstract

An atomizer base assembly, an electrostatic high-voltage generator assembly and an atomization rotating air flow control unit have a self-cleaning function for cleaning a rotating cup assembly and a structure for achieving a coating conveying function, and it is ensured that no impurity exists in color changing coating switching and cleaning in the process; in addition, the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly and the atomization rotating air flow control unit have the function of quantitatively adjusting the cyclone angle and range of shaping air, and the effect of accurately adjusting the spraying width of coating atomized particles is achieved. And finally, the device has the characteristics of cleaning of the inner and outer surfaces of the rotary cup and the paint conveying pipe, precise on-off of paint supply, no impurity in color-changing paint switching and process cleaning, and precise regulation and control of closed-loop control of the rotating speed of the rotary cup and the atomization shaping air inflow.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying equipment, and particularly relates to an electrostatic rotary cup spray gun. Background Art

[0002] The electrostatic rotary cup spray gun is an efficient spraying equipment, mainly used for evenly and efficiently spraying paint on the surfaces of various workpieces. Its working principle combines electrostatic adsorption and high-speed rotary cup atomization technology. By generating a strong centrifugal force through a high-speed rotating rotary cup, the paint is atomized into fine particles and precisely attached to the surface of the object to be painted through electrostatic adsorption.

[0003] For example, the Chinese patent with the authorization announcement number CN116618201B and the authorization announcement date of October 20, 2023, discloses "An Electrostatic Rotary Cup Spray Gun". This electrostatic rotary cup spray gun drives the adjustment column to move horizontally along the operation hole through a push-pull electromagnet, so that the diamond-shaped block switches positions in the deflection groove to realize the switching use of the straight channel and the V-shaped channel. When the connecting sleeve rotates to drive the auxiliary wheel to enter the V-shaped channel along the orientation groove, the atomizing rotary cup can also perform telescopic movement along the axis of the rotating shaft while rotating to disperse the paint liquid, which can change the air outlet gap between the atomizing rotary cup and the edge of the opening side of the isolation cover, and then perform a wave-like adjustment of the paint spraying surface to avoid spraying dead angles and blind areas when the electrostatic rotary cup spray gun sprays workpieces.

[0004] However, in the above-mentioned electrostatic rotary cup spray gun, there is no functional setting for cleaning the rotary cup assembly and the structure for realizing the paint conveying function, so it is impossible to ensure that there are no impurities in the switching of the color-changing paint and the process cleaning. At the same time, the structure for realizing the function of adjusting the cyclone angle and range of the shaping air is complex and inconvenient to operate, and it is impossible to achieve the purpose of precisely adjusting the spray pattern size of the paint atomization particles. Summary of the Invention

[0005] The purpose of the present invention is to provide an electrostatic rotary cup spray gun, which has the characteristics of cleaning the inner and outer surfaces of the rotary cup and the paint conveying pipe, precise on-off of paint supply, no impurities in the switching of the color-changing paint and the process cleaning, and closed-loop control of the rotary cup speed and the atomization shaping air intake volume for precise regulation.

[0006] The above technical object of the present invention is achieved through the following technical solutions: An electrostatic rotary cup spray gun includes a rotary cup assembly, a shaping air ring assembly, an atomizer protective housing, an atomizer base assembly with an air motor, an electrostatic high-voltage generator assembly, and an atomizing rotary air flow control unit. The electrostatic high-voltage generator assembly is installed on the atomizing rotary air flow control unit. The atomizer base assembly is installed on the electrostatic high-voltage generator assembly. The shaping air ring assembly is installed on the atomizer base assembly. The rotary cup assembly is located within the shaping air ring assembly and is installed on the air motor. The atomizer protective housing is installed on the atomizer base assembly to protect the atomizer base assembly and the shaping air ring assembly. The rotary cup assembly atomizes the paint through the centrifugal force of rotation. There is a paint delivery function between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit to deliver the paint to the rotary cup assembly. There is a self-cleaning function between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit to clean the structure where the paint delivery function is achieved at the rotary cup assembly. There is a function between the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit to quantitatively adjust the cyclone angle and range of the shaping air. There is a function between the electrostatic high-voltage generator and the atomizer base assembly to deliver charge to the structure where the paint delivery function is achieved to realize the function of charging the paint.

[0007] By adopting the above technical solutions, during the working process of the electrostatic rotary cup spray gun, the paint is delivered to the rotary cup assembly. The rotary cup assembly is driven by the air motor to rotate at a high speed. The rotary cup assembly atomizes the paint through the centrifugal force of rotation. At the same time, because there is a function between the electrostatic high-voltage generator and the atomizer base assembly to deliver charge to the structure where the paint delivery function is achieved to realize the function of charging the paint, the atomized paint particles are charged with static electricity. Due to the electrostatic induction effect, the paint particles are overall charged with high-voltage negative charges. Like charges repel each other, and thus the paint particles are dispersed into smaller particles with a smaller particle diameter, thereby ensuring the spraying effect and the coating quality. At the same time, there is a self-cleaning function between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit to clean the structure where the paint delivery function is achieved at the rotary cup assembly, ensuring that there are no impurities during the color change of the paint and the process cleaning. In addition, there is a function between the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit to quantitatively adjust the cyclone angle and range of the shaping air, achieving the effect of precisely adjusting the spray pattern size of the atomized paint particles.

[0008] A further setting of the present invention is as follows: The cup assembly includes a cup body threadedly connected to the main shaft of the air motor, a cup outer cleaning overflow ring arranged on the outer side of the cup body, and a diverter arranged inside the cup body. A paint delivery pipe passing through the main shaft of the air motor is arranged on the atomizer base assembly. The paint delivery pipe is used to deliver paint or cleaning agent to the cup assembly. There is a pipeline structure for delivering paint or cleaning agent to the paint delivery pipe among the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit. A plurality of diversion grooves are circumferentially arranged in an array at the inner edge of the opening of the cup body.

[0009] A further setting of the present invention is as follows: An annular groove is arranged in the middle of the cup body. An annular overflow channel is formed between the cup outer cleaning overflow ring and the cup body. A plurality of inclined holes are circumferentially arranged in an array on the cup body, with one end communicating with the annular groove and the other end communicating with the annular overflow channel. The diverter includes a mounting seat installed inside the cup body and located on one side of the annular groove, a diverter plate installed on the mounting seat and spaced from the mounting seat, and a mounting sleeve installed inside the cup body and located on the other side of the annular groove. A conical protrusion is arranged in the middle of the end face of the diverter plate close to the mounting seat. An annular diversion channel is formed between the circumferential side of the diverter plate and the inner wall of the cup body. A plurality of liquid leakage holes penetrating through both end faces are circumferentially arranged in an array on the circumferential side of the diverter plate where the conical protrusion is located. The surface of the diverter plate far from the mounting seat is in an inner conical shape.

[0010] A further setting of the present invention is as follows: The paint delivery pipe includes an inner pipe body, an outer pipe body arranged on the circumferential side of the inner pipe body, a gun head sealing nut arranged at one end of the outer pipe body close to the cup assembly, an expansion overflow sleeve arranged between the gun head sealing nut and the inner pipe body, and a locking nut arranged at one end of the outer pipe body far from the cup assembly. The inner pipe body is used to deliver paint. The sandwich channel formed between the inner pipe body and the outer pipe body is used to deliver cleaning agent. When the pressure of the cleaning agent in the sandwich channel is greater than the set value, the cleaning agent bulges out from the expansion overflow sleeve. The paint delivery pipe is used to deliver paint to the cup assembly for painting and to output the cleaning agent to the cup assembly for cleaning. One end of the inner pipe body of the paint delivery pipe passes through the central hole of the mounting sleeve and is embedded in the central hole of the mounting seat. There is a clearance between the outer wall of the inner pipe body and the inner wall of the central hole of the mounting seat. The gun head sealing nut is embedded in the central hole of the mounting sleeve.

[0011] By adopting the above three technical solutions, during the atomized spraying process of the coating, the coating flows along the annular diversion channels between the inner pipe body of the paint delivery pipe, the gaps between the mounting seat and the diverter plate, and the inner walls of the diverter plate and the cup body. During this process, the conical protrusions on the diverter plate are arranged such that the diversion performance is less affected by the spraying attitude inclination angle, and can effectively and evenly divert. The performance gets better as the flow rate increases. And during the rotation of the cup body, due to the centrifugal force and the diversion grooves, the coating is atomized to form high-quality fine and uniform coating particles. At the same time, due to the electrostatic induction effect, the whole coating is negatively charged with high voltage. Like charges repel each other, and thus the coating is dispersed into coating particles with even smaller particle diameters, thereby ensuring the spraying effect and the coating quality. During the cleaning process of the cup assembly, the cleaning agent flows along the sandwich channel between the inner pipe body and the outer pipe body of the paint delivery pipe. When the set cleaning agent pressure is reached, the expansion overflow sleeve opens, and the cleaning agent bulges out from the expansion overflow sleeve to the annular groove of the cup body and is divided into three fluid paths: (1) The cleaning agent first flows out through the annular groove and multiple inclined holes to the annular overflow channel between the overflow ring outside the cup and the cup body, and then flows to the outside of the cup body to realize the cleaning function outside the cup body of the cup body; (2) Through the gap between the inner pipe body of the paint delivery pipe and the central hole of the mounting seat, along the flow path of the coating spraying, it flows to the inside of the cup body to realize the cleaning function inside the cup body of the cup body; (3) It flows out through the liquid leakage holes of the diverter plate to the surface of the diverter plate far from the mounting seat for cleaning; finally, the all-round cleaning function of the cup assembly is realized.

[0012] The further setting of the present invention is: The shaping air ring assembly includes a shaping ring installation main body, an annular fixing plate installed by being embedded from one end of the shaping ring installation main body away from the cup assembly, an inner air outlet component installed by being embedded from the other end of the shaping ring installation main body, and an outer air outlet component installed by being embedded from the other end of the shaping ring installation main body and cooperating with the inner air outlet component; A plurality of outer shaping air outlet holes are circumferentially arranged on the end surface of the outer air outlet component; An outer shaping air duct structure communicating with the outer shaping air outlet holes is formed between the annular fixing plate, the shaping ring installation main body, the inner air outlet component, and the outer air outlet component; A plurality of inner shaping air outlet holes are circumferentially arranged on the end surface of the inner air outlet component, and an inner shaping air duct structure communicating with the inner shaping air outlet holes is formed between the shaping ring installation main body, the inner air outlet component, and the outer air outlet component; One circle of the outer shaping air outlet holes is located outside one circle of the inner shaping air outlet holes, and one circle of the outer shaping air outlet holes and one circle of the inner shaping air outlet holes are used to surround the circumferential side of the cup assembly.

[0013] A further setting of the present invention is as follows: A plurality of first through holes are circumferentially and arrayedly arranged on the annular fixing plate. A first annular cavity communicating with the plurality of first through holes is arranged inside the shaping ring mounting body. A plurality of second through holes communicating with the first annular cavity are arranged on the shaping ring mounting body. A second annular cavity communicating with the plurality of second through holes is arranged on the inner ring of the air outlet component. A plurality of third through holes communicating with the second annular cavity are circumferentially and arrayedly arranged on the circumferential side of the inner ring of the air outlet component. A third annular cavity communicating with the plurality of third through holes is arranged on the outer ring of the air outlet component; the first through holes, the first annular cavity, the second through holes, the second annular cavity, the third through holes, and the third annular cavity form an outer shaping air passage structure, and the outer shaping air outlet hole communicates with the third annular cavity; there is an air passage structure between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit for delivering outer shaping air to the plurality of first through holes.

[0014] A further setting of the present invention is as follows: A fourth cavity is arranged on the circumferential side of the shaping ring mounting body. A fifth annular cavity communicating with the fourth cavity is arranged on the inner ring of the air outlet component. A plurality of fourth through holes communicating with the fifth annular cavity are circumferentially and arrayedly arranged on the end surface of the inner ring of the air outlet component. A sixth annular cavity communicating with the fourth through holes is arranged on the outer ring of the air outlet component; the fourth cavity, the fifth annular cavity, and the fourth through holes form an inner shaping air passage structure, and the inner shaping air outlet hole communicates with the sixth annular cavity; there is an air passage structure between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit for outputting inner shaping air to the fourth cavity.

[0015] By adopting the above three technical solutions, first, the outer shaping air flows along the first through holes, the first annular cavity, the second through holes, the second annular cavity, the third through holes, and the third annular cavity and is discharged from the outer shaping air outlet hole, and the inner shaping air flows along the fourth cavity, the fifth annular cavity, the fourth through holes, and the sixth annular cavity and is discharged from the inner shaping air outlet hole; at this time, the atomizing rotary air flow control unit is used to adjust the air pressure values of the outer shaping air and the inner shaping air, and vector superposition of the shaping air is performed. When the air pressure of the outer shaping air is higher than that of the inner shaping air, it is manifested that the atomized spray pattern of the coating shrinks inward; when the air pressure of the outer shaping air is less than that of the inner shaping air, it is manifested that the atomized spray pattern of the coating expands outward; thus, the cyclone angle and range of the shaping air can be quantitatively adjusted, and the effect of accurately adjusting the spray pattern size of the coating atomized particles can be achieved.

[0016] The further setting of the present invention is as follows: The atomizer base assembly includes an atomizer base for mounting on the electrostatic high-voltage generator assembly, an air motor provided on the atomizer base, a paint delivery pipe provided on the atomizer base and passing through the main shaft of the air motor, a paint electrostatic induction conductive structure, and a shaping air enclosure provided on the periphery of the atomizer base; A paint supply pipeline communicating with the inner pipe body of the paint delivery pipe is provided on the atomizer base, a first cleaning agent supply pipeline communicating with the interlayer channel between the outer pipe body and the inner pipe body of the paint delivery pipe is provided on the atomizer base, a first 2-position 2-way air-controlled pilot valve for controlling the on-off of the paint supply pipeline is provided on the atomizer base, a second 2-position 2-way air-controlled pilot valve for controlling the on-off of the first cleaning agent supply pipeline is provided on the atomizer base, and there is a pipeline structure connecting the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit and communicating with the paint supply pipeline and the first cleaning agent supply pipeline; A purging air airway communicating with the interlayer channel between the outer pipe body and the inner pipe body of the paint delivery pipe is provided on the atomizer base, a three 2-position 2-way air-controlled pilot valve for controlling the on-off of the purging air airway is provided on the atomizer base, and there is an airway structure connecting the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit and communicating with the purging air airway; The shaping ring mounting body of the shaping air ring assembly is connected between the atomizer base and the shaping air enclosure, an outer shaping air airway communicating with a plurality of first through holes is formed in the atomizer base, an inner shaping air airway communicating with the fourth cavity is formed between the atomizer base and between the atomizer base and the outer shaping air enclosure, and there is an airway structure connecting the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit and communicating with the outer shaping air airway and the inner shaping air airway; The air motor uses compressed air as the driving force, and the main shaft of the air motor is threadedly connected to the cup body of the cup assembly; The paint electrostatic induction conductive structure is used to transfer the charge of the electrostatic high-voltage generator assembly to the paint delivery pipe to realize the charged function of the paint delivery pipe.

[0017] By adopting the above technical solutions, in the atomizer base assembly, the paint supply pipeline and the first cleaning agent supply pipeline on the atomizer base cooperate with the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit to have a pipeline structure that connects the paint supply pipeline and the first cleaning agent supply pipeline, so as to realize the transportation of paint and cleaning agent. And after cleaning the cup assembly, by opening the third 2-position 2-way pneumatic pilot valve, the purging air is made to flow along the cleaning path of the cleaning agent, and finally the function of blowing and drying the inner and outer surfaces of the cup assembly after cleaning with the cleaning agent is realized; similarly, an outer shaping air airway communicating with a plurality of first through holes is formed in the atomizer base, and an inner shaping air airway communicating with the fourth cavity is formed between the inside of the atomizer base, the atomizer base and the outer shaping air sealing cover. Cooperating with the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit to have an airway structure that connects the outer shaping air airway and the inner shaping air airway, the transportation of outer shaping air and inner shaping air is realized; at the same time, since most paints are flammable, the air motor uses compressed air as the driving force to ensure safety; in addition, the paint electrostatic induction conductive structure is used to transport the charge of the electrostatic high-voltage generator assembly to the paint delivery pipe to realize the function of the paint delivery pipe being charged with electricity.

[0018] A further setting of the present invention is that: the air motor includes a motor housing, a main shaft, an air floating plain bearing, a first static pressure graphite air floating bearing, a second static pressure graphite air floating bearing, and a speed measuring structure for measuring the rotation speed of the main shaft; the motor housing includes a bottom of the motor housing, a lower part of the motor housing arranged on the bottom of the motor housing, a middle part of the motor housing arranged on the lower part of the motor housing, and an upper part of the motor housing arranged on the middle part of the motor housing; the air floating plain bearing is arranged between the main shaft and the bottom of the motor housing, the first static pressure graphite air floating bearing is arranged between the lower part of the motor housing and the main shaft, and the second static pressure graphite air floating bearing is arranged between the upper part of the motor housing and the main shaft; a bearing air airway for supplying air to the air floating plain bearing, the first static pressure graphite air floating bearing, and the second static pressure graphite air floating bearing is arranged in the motor housing; a driving impeller driven to rotate by gas is arranged at the tail end of the main shaft, and a plurality of rotating air inlets communicating with the driving impeller are arranged on the lower part of the motor housing; a decelerating air airway communicating with the driving impeller is arranged between the bottom of the motor housing and the lower part of the motor housing; a plurality of groove holes are arranged in a circumferential array on the circumferential side of the main shaft corresponding to the middle part of the motor housing, and a braking structure for being embedded into the groove holes to realize emergency stop and locking is arranged on the middle part of the motor housing; a plurality of exhaust holes are arranged on the circumferential side of the lower part of the motor housing A further setting of the present invention is that a plurality of brake air input mounting holes are provided in the middle of the motor housing. The braking structure includes a plurality of brake shafts that are respectively telescopically arranged in the brake air input mounting holes and are used to be embedded at the groove holes to achieve emergency stop and locking, and a plurality of compression springs that are arranged in the brake air input mounting holes and drive the brake shafts to move away from the groove holes.

[0019] A further setting of the present invention is that a fiber optic speed measurement pulse sensor for measuring the rotational speed of the air motor is provided between the electrostatic high voltage generator assembly and the atomizer base. The bottom of the drive impeller of the air motor has a circular ring portion with four equal parts of black and metallic natural color spaced from each other. The fiber optic speed measurement pulse sensor calculates the actual rotational speed of the motor through the pulses received by irradiating the black part for absorption and the metallic natural color part for reflection by the optical fiber. The fiber optic speed measurement pulse sensor is installed on the electrostatic high voltage generator assembly, and an installation channel for the optical fiber of the fiber optic speed measurement pulse sensor to extend to the drive impeller is provided between the electrostatic high voltage generator assembly and the atomizer base.

[0020] By adopting the above three technical solutions, the air motor has the following functions: (1) High-speed rotation function: The main shaft of the air motor is connected through an air floating plane bearing, a first static pressure graphite air floating bearing, and a second static pressure graphite air floating bearing, so that the main shaft is in a suspended state, providing a zero-friction condition for the high-speed rotation of the main shaft; (2) Main shaft rotation function: Compressed air enters along the rotating air airway and a plurality of rotating air inlets, so as to drive the drive impeller and the main shaft to rotate at high speed; (3) Main shaft braking function: Compressed air enters along the airway structure of the atomizer base and the deceleration air airway, and reacts on the impeller to reduce the rotational speed of the main shaft; (4) Main shaft emergency stop function: Compressed air enters the braking mounting hole along the emergency stop air passage, overcomes the elastic force of the compression spring, makes the brake shaft move downward to the groove hole of the main shaft, and uses the impact between the brake shaft and the groove hole of the main shaft to achieve the emergency stop and locking function. At the same time, after the compressed air supply stops, the compression spring drives the brake shaft to reset; (5) Compressed air discharge function: The various compressed air entering the air motor is discharged along the exhaust hole and the exhaust air airway after doing work, without an air heater, avoiding the condensation of the airway structures at the atomizer base and the airway structures of the air motor. At the same time, by providing a circular ring portion with four equal parts of black and metallic natural color spaced from each other at the bottom of the drive impeller of the air motor, the fiber optic speed measurement pulse sensor calculates the actual rotational speed of the motor through the pulses received by irradiating the black part for absorption and the metallic natural color part for reflection by the optical fiber.

[0021] A further setting of the present invention is that a positive-pressure purging air passage is formed between the main shaft of the air motor and the paint delivery pipe. A positive-pressure purging air passage is provided on the atomizer base and is in communication with the positive-pressure purging air passage after the air motor is installed. An airway structure for communicating the positive-pressure purging air passage is provided between the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit.

[0022] By adopting the above technical solution, when the electrostatic bell cup spray gun is spraying paint at a certain elevation angle during the paint spraying process, when the paint is pumped from the paint delivery pipe to the bell cup assembly, since there is a gap between the stationary paint delivery pipe and the rotating assembly, some paint will enter the cavity formed between the main shaft of the air motor and the paint delivery pipe, causing accumulation and pollution. Therefore, during the spraying process, positive-pressure purging is carried out through compressed air along the positive-pressure purging air passage and the positive-pressure purging air passage to prevent some paint particles from falling into the cavity formed by the paint delivery pipe and the main shaft of the air motor, causing pollution.

[0023] A further setting of the present invention is that a second cleaning agent supply pipeline and a sewage discharge pipeline are provided on the atomizer base. The ends of the second cleaning agent supply pipeline and the sewage discharge pipeline are connected in parallel. A fourth 2-position 2-way pneumatically controlled pilot valve for connecting the inlet ends of the second cleaning agent supply pipeline and the sewage discharge pipeline is provided on the atomizer base. A connecting pipeline for communicating the output end of the fourth 2-position 2-way pneumatically controlled pilot valve and the inlet end of the first 2-position 2-way pneumatically controlled pilot valve is provided on the atomizer base. The first 2-position 2-way pneumatically controlled pilot valve simultaneously controls whether the paint supply pipeline and the connecting pipeline are in communication with the inner pipe body of the paint delivery pipe; when the paint color needs to be switched, the following operating steps are carried out: (S1) Open the first 2-position 2-way pneumatically controlled pilot valve and the fourth 2-position 2-way pneumatically controlled pilot valve. A stream of cleaning agent is transported along the second cleaning agent supply pipeline and the connecting pipeline to the inner pipe body of the paint delivery pipe and flows out from the bell cup assembly, realizing the cleaning of the inner pipe body of the paint delivery pipe. Another stream of cleaning agent flows along the second cleaning agent supply pipeline, the connecting pipeline, and the paint supply pipeline to the pipeline structure for transporting paint between the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit, realizing the cleaning of the pipeline for the paint supply source; (S2) After the cleaning is completed, connect another color of paint, close the first 2-position 2-way pneumatically controlled pilot valve, and open the fourth 2-position 2-way pneumatically controlled pilot valve. The paint mixed with the residual cleaning agent flows out along the paint supply pipeline, the connecting pipeline, and the sewage discharge pipeline. The cleaning agent from the second cleaning agent supply pipeline enters the sewage discharge pipeline under the action of the conveying pressure; (S3) Finally, open the first 2-position 2-way pneumatically controlled pilot valve and close the fourth 2-position 2-way pneumatically controlled pilot valve to spray a new paint color.

[0024] By adopting the above technical solution, when the paint color needs to be switched, the following operating steps are carried out: (S1) Open the first 2-position 2-way pneumatic pilot valve and the fourth 2-position 2-way pneumatic pilot valve. A stream of cleaning agent is transported along the second cleaning agent supply pipeline and the connecting pipeline to the inner pipe body of the paint delivery pipe and flows out from the cup assembly, realizing the cleaning of the inner pipe body of the paint delivery pipe. Another stream of cleaning agent flows along the second cleaning agent supply pipeline, the communication pipeline, and the paint supply pipeline to the electrostatic high-voltage generator assembly and the pipeline structure for transporting paint between the atomizing rotary air flow control units, realizing the cleaning of the pipeline for the paint supply source; (S2) After the cleaning is completed, connect another color of paint, close the first 2-position 2-way pneumatic pilot valve, and open the fourth 2-position 2-way pneumatic pilot valve. The paint mixed with the residual cleaning agent flows out along the paint supply pipeline, the communication pipeline, and the sewage pipeline. The cleaning agent from the second cleaning agent supply pipeline enters the sewage pipeline under the action of the conveying pressure; (S3) Finally, open the first 2-position 2-way pneumatic pilot valve and close the fourth 2-position 2-way pneumatic pilot valve to spray a new paint color.

[0025] The further setting of the present invention is as follows: The electrostatic high-voltage generator assembly includes a mounting base and an electrostatic high-voltage generator arranged inside the mounting base; the atomizer base is mounted on the mounting base. The mounting base is integrated with a plurality of first partition air channels respectively communicating with the compressed air required at the atomizer base assembly, and the mounting base is integrated with a plurality of first partition liquid pipelines respectively communicating with the required liquid at the atomizer base assembly; the paint electrostatic induction conductive structure includes a socket arranged on the atomizer base, a conductive ring electrically connected to the socket, and a first conductive rod connected between the locking nut of the paint delivery pipe and the conductive ring; a plug electrically connected to the electrostatic high-voltage generator and a second conductive rod electrically connected to the plug are arranged on the mounting base; when the atomizer base is mounted on the mounting base, the second conductive rod is electrically connected to the socket, realizing the charged function of the paint delivery pipe.

[0026] By adopting the above technical solution, the paint electrostatic induction conductive structure includes a socket arranged on the atomizer base, a conductive ring electrically connected to the socket, and a first conductive rod connected between the locking nut of the paint delivery pipe and the conductive ring; a plug electrically connected to the electrostatic high-voltage generator and a second conductive rod electrically connected to the plug are arranged on the mounting base; when the atomizer base is mounted on the mounting base, the second conductive rod is electrically connected to the socket, realizing the charged function of the paint delivery pipe.

[0027] The further setting of the present invention is as follows: The atomizing rotary air flow control unit is used to be connected to the end flange of the robot and is for the mounting base to install. A plurality of second partition air ducts respectively communicating with the first partition air ducts on the mounting base are integrated on the atomizing rotary air flow control unit, and a plurality of second partition liquid pipelines respectively communicating with the first partition liquid pipelines on the mounting base are integrated on the atomizing rotary air flow control unit; There are three groups of step flow control valves and an outlet gas flow sensor in the atomizing rotary air flow control unit. The valve core of the step flow control valve controls the air output flow, and the outlet gas flow sensor is configured to accurately and finitely detect the real-time output gas flow rate; Two of the step flow control valves and the outlet gas flow sensor are respectively used to control the air pressure values of the outer shaping air and the inner shaping air; The remaining group of step flow control valves and the outlet gas flow sensor are used to control the air pressure value of the compressed air entering the rotary air duct.

[0028] By adopting the above technical solution, two of the step flow control valves and the outlet gas flow sensor are respectively used to control the air pressure values of the outer shaping air and the inner shaping air, so as to realize real-time closed-loop feedback control of the air pressure values of the two inner and outer shaping airs, and perform vector superposition on the shaping air. When the air pressure of the outer shaping air is higher than that of the inner shaping air, it is manifested that the atomizing spray pattern of the paint shrinks inward; When the air pressure of the outer shaping air is less than that of the inner shaping air, it is manifested that the atomizing spray pattern of the paint expands inward; Thus, the cyclone angle and range of the shaping air can be quantitatively adjusted, achieving the effect of accurately adjusting the spray pattern size of the paint atomization particles. The remaining group of step flow control valves and the outlet gas flow sensor are used to control the air pressure value of the compressed air entering the rotary air duct, so as to realize real-time closed-loop feedback control of the spindle speed of the air motor (i.e., the rotating cup assembly speed). Brief Description of the Drawings

[0029] Figure 1 is the structural schematic diagram of the present invention (the electrostatic high-voltage generator assembly is partially cut open); Figure 2 is the exploded view of the structure of the rotating cup assembly in the present invention; Figure 3 is the cross-sectional view of the structure of the rotating cup assembly and the paint supply pipe in the present invention; Figure 4 is Figure 3 the structural schematic diagram of the lower half part on the basis; Figure 5 is the structural schematic diagram of the shaping air ring assembly in the present invention; Figure 6 is the cross-sectional view of the structure of the shaping air ring assembly in the present invention; Figure 7 is the exploded view of the structure of the atomizer base assembly in the present invention; Figure 8It is a structural sectional view of the atomizer base assembly in the present invention (for showing the path of the coating supply pipeline); Figure 9 It is a structural sectional view of the atomizer base assembly, the cup atomizer assembly, and the shaping air ring assembly in the present invention (for showing the path of the first cleaning agent supply pipeline); Figure 10 It is a structural sectional view of the atomizer base assembly, the cup atomizer assembly, and the shaping air ring assembly in the present invention (for showing the path of the purging air duct); Figure 11 It is a structural sectional view of the atomizer base assembly and the shaping air ring assembly in the present invention (for showing the path of the outer shaping air duct); Figure 12 It is a structural sectional view of the atomizer base assembly and the shaping air ring assembly in the present invention (for showing the path of the inner shaping air duct); Figure 13 It is an exploded view of the structure of the air motor in the present invention; Figure 14 It is a structural sectional view of the air motor in the present invention; Figure 15 It is a structural sectional view of the air motor in the present invention (for showing the path of the bearing air duct); Figure 16 It is a structural sectional view of the atomizer base assembly in the present invention (for showing the path of the rotating air duct); Figure 17 It is a structural sectional view of the air motor in the present invention (for showing the path of the decelerating air duct); Figure 18 It is a transverse structural sectional view of the air motor in the present invention (for showing the rotating air inlet and the decelerating air inlet); Figure 19 It is a structural sectional view of the atomizer base assembly in the present invention (for showing the path of the emergency stop air duct); Figure 20 It is a transverse structural sectional view of the air motor in the present invention (for showing the emergency stop structure); Figure 21 It is a structural sectional view of the atomizer base assembly in the present invention (for showing the path of the exhaust air duct); Figure 22 It is a schematic view of the bottom surface of the drive impeller of the main shaft of the air motor in the present invention; Figure 23 It is a structural sectional view at the cup atomizer assembly, the shaping air ring assembly, the atomizer protective housing, the atomizer base assembly, and the electrostatic high-voltage generator assembly in the present invention (for showing the electrical connection structure related to the coating electrostatic induction conductive structure); Figure 24It is a structural cross-sectional view of the atomizer base assembly, cup assembly, and shaping air ring assembly in the present invention (for showing the path of the positive-pressure purging air); Figure 25 It is a schematic structural diagram of the paint delivery pipe, paint supply pipeline, first cleaning agent supply pipeline, purging and cleaning air airway, second cleaning agent supply pipeline, and sewage pipeline in the present invention (specifically showing after the pipelines and airways are peeled off from the atomizer base); Figure 26 It is a horizontal structural cross-sectional view of the atomizer base in the present invention (for showing the structure at the first 2-position 2-way pneumatically controlled pilot valve and the fourth 2-position 2-way pneumatically controlled pilot valve); Figure 27 It is a schematic structural diagram of the atomizer base assembly in the present invention (for showing the paint electrostatic induction conductive structure); Figure 28 It is a structural cross-sectional view of the atomizing rotary air flow control unit in the present invention; Figure 29 It is an exploded view of the atomizing rotary air flow control unit in the present invention.

[0030] Reference numerals: 1. Rotating cup assembly; 1-1. Rotating cup body; 1-1-1. Shunt groove; 1-1-2. Annular groove; 1-1-3. Oblique hole; 1-2. Cup outer cleaning overflow ring; 1-3. Shunt; 1-3-1. Mounting seat; 1-3-2. Shunt plate; 1-3-2-1. Conical protrusion; 1-3-2-2. Liquid leakage hole; 1-3-3. Mounting sleeve; 1-3-4. Annular shunt channel; 1-4. Annular overflow channel; 2. Shaping air ring assembly; 2-1. Shaping ring mounting body; 2-1-1. First annular cavity; 2-1-2. Second through hole; 2-1-3. Fourth cavity; 2-2. Annular fixing plate; 2-2-1. First through hole; 2-3. Inner ring of air outlet component; 2-3-1. Second annular cavity; 2-3-2. Third through hole; 2-3-3. Fifth annular cavity; 2-3-4. Fourth through hole; 2-4. Outer ring of air outlet component; 2-4-1. Third annular cavity; 2-4-2. Outer shaping air outlet hole; 2-4-3. Sixth annular cavity; 2-4-4. Inner shaping air outlet hole; 3. Atomizer protective housing; 4. Atomizer base assembly; 4-1. Atomizer base; 4-1-1. Coating supply pipeline; 4-1-2. First cleaning agent supply pipeline; 4-1-3. First 2-position 2-way pneumatically controlled pilot valve; 4-1-4. Second 2-position 2-way pneumatically controlled pilot valve; 4-1-5. Blowing and purging air duct; 4-1-6. Third 2-position 2-way pneumatically controlled pilot valve; 4-1-7. Outer shaping air duct; 4-1-8. Inner shaping air duct; 4-1-9. Rotating air duct; 4-1-10; Emergency stop air duct; 4-1-11. Exhaust air duct; 4-1-12. Positive pressure purging air duct; 4-1-13. Second cleaning agent supply pipeline; 4-1-14. Sewage pipeline; 4-1-15. Fourth 2-position 2-way pneumatically controlled pilot valve; 4-1-16. Connecting pipeline; 4-2. Air motor; 4-2-1. Motor housing; 4-2-1-1. Bottom of motor housing; 4-2-1-2. Lower part of motor housing; 4-2-1-3. Middle part of motor housing; 4-2-1-4. Upper part of motor housing; 4-2-1-5. Bearing air duct; 4-2-1-6. Rotating air inlet; 4-2-1-7. Decelerating air inlet; 4-2-1-8. Braking mounting hole; 4-2-1-9. Braking shaft; 4-2-1-10. Compression spring; 4-2-1-11. Exhaust hole; 4-2-1-12. Decelerating air duct; 4-2-2. Main shaft; 4-2-2-1. Driving impeller; 4-2-2-2. Grooved hole; 4-2-3. Aerostatic plain bearing; 4-2-4. First static pressure graphite aerostatic bearing; 4-2-5. Second static pressure graphite aerostatic bearing; 4-3. Paint delivery pipe; 4-3-1. Inner pipe body; 4-3-2. Outer pipe body; 4-3-3. Gun head sealing nut; 4-3-4. Expansion overflow sleeve; 4-3-5. Locking nut; 4-4. Coating electrostatic induction conductive structure; 4-4-1. Socket; 4-4-2. Conductive ring;4-4-3, First conductive rod; 4-5, Shaping air enclosure; 5, Electrostatic high-voltage generator assembly; 5-1, Mounting base; 5-1-1, Plug; 5-1-2, Second conductive rod; 5-2, Electrostatic high-voltage generator; 5-3, Fiber optic speed measurement pulse sensor; 6, Atomizing rotary air flow control unit; 6-1, Stepping flow control valve; 6-2, Outlet gas flow sensor.; Detailed implementation mode

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example: An electrostatic rotary cup spray gun, as Figure 1 shown, includes a rotary cup assembly 1, a shaping air ring assembly 2, an atomizer protective housing 3, an atomizer base assembly 4 with an air motor 4-2, an electrostatic high-voltage generator assembly 5, and an atomizing rotary air flow control unit 6. The electrostatic high-voltage generator assembly 5 is installed on the atomizing rotary air flow control unit 6, the atomizer base assembly 4 is installed on the electrostatic high-voltage generator assembly 5, the shaping air ring assembly 2 is installed on the atomizer base assembly 4, the rotary cup assembly 1 is inside the shaping air ring assembly 2 and installed on the air motor 4-2, and the atomizer protective housing 3 is installed on the atomizer base assembly 4 to protect the atomizer base assembly 4 and the shaping air ring assembly 2. The rotary cup assembly 1 atomizes the paint by the centrifugal force of rotation; there is a paint delivery function between the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 to deliver the paint to the rotary cup assembly 1; there is a self-cleaning function between the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 to clean the structure at the rotary cup assembly 1 where the paint delivery function is achieved; there is a function between the shaping air ring assembly 2, the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 to quantitatively adjust the cyclone angle and range of the shaping air; there is a function between the electrostatic high-voltage generator 5-2 and the atomizer base assembly 4 to transfer charge to the structure where the paint delivery function is achieved to achieve the function of charging the paint.

[0033] As Figure 1 , Figures 2 to 4As shown, the bell assembly 1 includes a bell body 1-1, an outer cup cleaning overflow ring 1-2 arranged on the outside of the bell body 1-1, and a diverter 1-3 arranged inside the bell body 1-1. The bell body 1-1 and the outer cup cleaning overflow ring 1-2 are made of titanium alloy, and the diverter 1-3 is made of PEEK, which has strong corrosion resistance and light texture. The bell body 1-1 is threadedly connected to the main shaft 4-2-2 of the air motor 4-2, and 600 diverter grooves 1-1-1 are arranged in a circular array at the inner edge of the opening of the bell body 1-1, and the cross-section of the diverter groove 1-1-1 is a semicircle with a radius equal to 0.075mm. An annular groove 1-1-2 is arranged in the middle of the bell body 1-1, an annular overflow channel 1-4 is formed between the cup external cleaning overflow ring 1-2 and the bell body 1-1, and a plurality of inclined holes 1-1-3 are arranged in a circumferential array on the bell body 1-1, one end of which is connected to the annular groove 1-1-2 and the other end is connected to the annular overflow channel 1-4; the flow divider 1-3 includes a mounting seat 1-3-1 installed in the bell body 1-1 and located on one side of the annular groove 1-1-2, a flow divider plate 1-3-2 installed on the mounting seat 1-3-1 and spaced from the mounting seat 1-3-1, and a flow divider plate 1-3-2 installed on the bell body 1-1 and spaced from the mounting seat 1-3-1. A mounting sleeve 1-3-3 is located inside the bell body 1-1 and on the other side of the annular groove 1-1-2, a conical protrusion 1-3-2-1 is provided in the middle of the end surface of the diverter plate 1-3-2 close to the mounting seat 1-3-1, an annular diverter channel 1-3-4 is formed between the circumferential side of the diverter plate 1-3-2 and the inner wall of the bell body 1-1, a plurality of leakage holes 1-3-2-2 are provided in a circumferential array on the circumferential side of the conical protrusion 1-3-2-1 of the diverter plate 1-3-2 and penetrate its two end surfaces, and the surface of the diverter plate 1-3-2 away from the mounting seat 1-3-1 is in the shape of an inner cone.

[0034] like Figure 1 , Figure 5 and Figure 6 As shown, the shaping air ring assembly 2 includes a shaping ring mounting body 2-1, an annular fixing plate 2-2 embedded and installed from one end of the shaping ring mounting body 2-1 away from the bell assembly 1, an air outlet component inner ring 2-3 embedded and installed from the other end of the shaping ring mounting body 2-1, and an air outlet component outer ring 2-4 embedded and installed from the other end of the shaping ring mounting body 2-1 and matched with the air outlet component inner ring 2-3. The overall material of the shaping air ring assembly 2 is SUS316 stainless steel.

[0035] like Figure 5 and Figure 6As shown, a plurality of first through holes 2-2-1 are arranged in a circumferential array on the annular fixing plate 2-2. A first annular cavity 2-1-1 communicating with the plurality of first through holes 2-2-1 is arranged in the shaping ring mounting body 2-1. A plurality of second through holes 2-1-2 communicating with the first annular cavity 2-1-1 are arranged on the shaping ring mounting body 2-1. A second annular cavity 2-3-1 communicating with the plurality of second through holes 2-1-2 is arranged on the inner ring 2-3 of the air outlet component. A plurality of third through holes 2-3-2 communicating with the second annular cavity 2-3-1 are arranged in a circumferential array on the circumferential side of the inner ring 2-3 of the air outlet component. A third annular cavity 2-4-1 communicating with the plurality of third through holes 2-3-2 is arranged on the outer ring 2-4 of the air outlet component. A plurality of outward shaping air outlet holes 2-4-2 which are inclined and communicate with the third annular cavity 2-4-1 are arranged in a circumferential array on the end face of the outer ring 2-4 of the air outlet component; a fourth cavity 2-1-3 is arranged on the circumferential side of the shaping ring mounting body 2-1. A fifth annular cavity 2-3-3 communicating with the fourth cavity 2-1-3 is arranged on the inner ring 2-3 of the air outlet component. A plurality of fourth through holes 2-3-4 communicating with the fifth annular cavity 2-3-3 are arranged in a circumferential array on the end face of the inner ring 2-3 of the air outlet component. A sixth annular cavity 2-4-3 communicating with the fourth through holes 2-3-4 is arranged on the outer ring 2-4 of the air outlet component. A plurality of inward shaping air outlet holes 2-4-4 which are inclined and communicate with the sixth annular cavity 2-4-3 are arranged in a circumferential array on the end face of the outer ring 2-4 of the air outlet component. A circle of outward shaping air outlet holes 2-4-2 is located on the outer circle of a circle of inward shaping air outlet holes 2-4-4.

[0036] As Figure 5 and Figure 6 shown, the first through holes 2-2-1, the first annular cavity 2-1-1, the second through holes 2-1-2, the second annular cavity 2-3-1, the third through holes 2-3-2, and the third annular cavity 2-4-1 form an outward shaping air duct structure, and the outward shaping air outlet holes 2-4-2 communicate with the third annular cavity 2-4-1. The fourth cavity 2-1-3, the fifth annular cavity 2-3-3, and the fourth through holes 2-3-4 form an inward shaping air duct structure, and the inward shaping air outlet holes 2-4-4 communicate with the sixth annular cavity 2-4-3. There is an air duct structure between the atomizer base assembly 4, the electrostatic high voltage generator assembly 5, and the atomizing rotary air flow control unit 6 for delivering outward shaping air to the plurality of first through holes 2-2-1 and outputting inward shaping air to the fourth cavity 2-1-3.

[0037] As Figure 1 and Figure 7As shown, the atomizer base assembly 4 includes an atomizer base 4-1 for mounting on the electrostatic high-voltage generator assembly 5, an air motor 4-2 provided on the atomizer base 4-1, a paint delivery pipe 4-3 provided on the atomizer base 4-1 and passing through the main shaft 4-2-2 of the air motor 4-2, a paint electrostatic induction conductive structure 4-4, and a shaping air enclosure 4-5 provided on the periphery of the atomizer base 4-1.

[0038] As Figure 1 , Figure 3 , Figure 4 and Figure 7 shown, the paint delivery pipe 4-3 is used to deliver paint or cleaning agent to the cup assembly 1. There is a pipeline structure for delivering paint or cleaning agent between the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 (this pipeline structure is a general term, and some structures will be described in detail later. The same applies to other pipeline structures). The paint delivery pipe 4-3 includes an inner pipe body 4-3-1, an outer pipe body 4-3-2 provided on the periphery of the inner pipe body 4-3-1, a gun head sealing nut 4-3-3 provided at one end of the outer pipe body 4-3-2 close to the cup assembly 1, an expansion overflow sleeve 4-3-4 made of rubber FFKM provided between the gun head sealing nut 4-3-3 and the inner pipe body 4-3-1, and a locking nut 4-3-5 provided at one end of the outer pipe body 4-3-2 far from the cup assembly 1. The inner pipe body 4-3-1 is used to deliver paint, and the sandwich channel formed between the inner pipe body 4-3-1 and the outer pipe body 4-3-2 is used to deliver the cleaning agent. When the pressure of the cleaning agent in the sandwich channel is greater than the set value (the delivery liquid pressure of the cleaning agent in this patent is 0.2 Mpa), the cleaning agent bulges out from the expansion overflow sleeve 4-3-4; the paint delivery pipe 4-3 is used to deliver paint to the cup assembly 1 for painting, and the paint delivery pipe 4-3 is used to output the cleaning agent to the cup assembly 1 for cleaning; one end of the inner pipe body 4-3-1 of the paint delivery pipe 4-3 passes through the central hole of the mounting sleeve 1-3-3 and is embedded in the central hole of the mounting seat 1-3-1. There is a clearance between the outer wall of the inner pipe body 4-3-1 and the inner wall of the central hole of the mounting seat 1-3-1, and the gun head sealing nut 4-3-3 is embedded in the central hole of the mounting sleeve 1-3-3.

[0039] As Figure 1 , Figures 8 to 12 , Figure 25As shown, on the atomizer base 4-1, there is a paint supply pipeline 4-1-1 connecting to the inner pipe body 4-3-1 of the paint delivery pipe 4-3. On the atomizer base 4-1, there is a first cleaning agent supply pipeline 4-1-2 connecting to the sandwich channel between the outer pipe body 4-3-2 and the inner pipe body 4-3-1 of the paint delivery pipe 4-3. On the atomizer base 4-1, there is a first 2-position 2-way pneumatically controlled pilot valve 4-1-3 for controlling the on / off of the paint supply pipeline 4-1-1. On the atomizer base 4-1, there is a second 2-position 2-way pneumatically controlled pilot valve 4-1-4 for controlling the on / off of the first cleaning agent supply pipeline 4-1-2. Between the electrostatic high-voltage generator assembly 5 and the atomizing rotary air flow control unit 6, there is a pipeline structure connecting the paint supply pipeline 4-1-1 and the first cleaning agent supply pipeline 4-1-2. On the atomizer base 4-1, there is a blow-off and cleaning air airway 4-1-5 connecting to the sandwich channel between the outer pipe body 4-3-2 and the inner pipe body 4-3-1 of the paint delivery pipe 4-3. On the atomizer base 4-1, there is a third 2-position 2-way pneumatically controlled pilot valve 4-1-6 for controlling the on / off of the blow-off and cleaning air airway 4-1-5. Between the electrostatic high-voltage generator assembly 5 and the atomizing rotary air flow control unit 6, there is an airway structure connecting the blow-off and cleaning air airway 4-1-5 (this airway structure is a general term, and some structures will be elaborated later, and the same applies to other airway structures). The shaping ring mounting body 2-1 of the shaping air ring assembly 2 is connected between the atomizer base 4-1 and the shaping air enclosure 4-5. An outer shaping air airway 4-1-7 communicating with a plurality of first through holes 2-2-1 is formed inside the atomizer base 4-1. Inside the atomizer base 4-1 and between the atomizer base 4-1 and the outer shaping air enclosure 4-5, there is an inner shaping air airway 4-1-8 communicating with the fourth cavity 2-1-3 (due to different cross-sectional angles in Figure 6 , Figure 12 , the displayed structures are different). Between the electrostatic high-voltage generator assembly 5 and the atomizing rotary air flow control unit 6, there is an airway structure connecting the outer shaping air airway 4-1-7 and the inner shaping air airway 4-1-8.

[0040] Such as Figure 7 , Figure 13 and Figure 14As shown in the figure, the air motor 4-2 uses compressed air as the driving force. The main shaft 4-2-2 of the air motor 4-2 is threadedly connected to the cup body 1-1 of the cup assembly 1. The air motor 4-2 includes a motor housing 4-2-1, a main shaft 4-2-2, an air floating plain bearing 4-2-3, a first static pressure graphite air floating bearing 4-2-4, and a second static pressure graphite air floating bearing 4-2-5. The motor housing 4-2-1 includes a bottom part 4-2-1-1 of the motor housing, a lower part 4-2-1-2 of the motor housing arranged on the bottom part 4-2-1-1 of the motor housing, a middle part 4-2-1-3 of the motor housing arranged on the lower part 4-2-1-2 of the motor housing, and an upper part 4-2-1-4 of the motor housing arranged on the middle part 4-2-1-3 of the motor housing. The air floating plain bearing 4-2-3 is arranged between the main shaft 4-2-2 and the bottom part 4-2-1-1 of the motor housing. The first static pressure graphite air floating bearing 4-2-4 is arranged between the lower part 4-2-1-2 of the motor housing and the main shaft 4-2-2. The second static pressure graphite air floating bearing 4-2-5 is arranged between the upper part 4-2-1-4 of the motor housing and the main shaft 4-2-2.

[0041] As Figure 1 , Figures 13 to 21 shown in the figure, a bearing air air passage 4-2-1-5 for supplying air to the air floating plain bearing 4-2-3, the first static pressure graphite air floating bearing 4-2-4, and the second static pressure graphite air floating bearing 4-2-5 is arranged in the motor housing 4-2-1. A driving impeller 4-2-2-1 (the blades of which are C-shaped and arranged in a circumferential array) driven by gas is arranged at the tail end of the main shaft 4-2-2. A plurality of rotating air inlets 4-2-1-6 communicating with the driving impeller 4-2-2-1 are arranged on the lower part 4-2-1-2 of the motor housing (cooperating with Figure 13 and Figure 18 , Figure 16 the cross-sectional view angle in which is not clearly shown), and a rotating air air passage 4-1-9 communicating with the plurality of rotating air inlets 4-2-1-6 after the air motor 4-2 is installed is arranged on the atomizer base 4-1. A deceleration air air passage 4-2-1-12 communicating with the driving impeller 4-2-2-1 is arranged between the bottom part 4-2-1-1 of the motor housing and the lower part 4-2-1-2 of the motor housing, and an air passage structure communicating with the deceleration air air passage 4-2-1-12 after the air motor 4-2 is installed is arranged on the atomizer base 4-1. Groove holes 4-2-2-2 are arranged in a circumferential array on the circumferential side of the main shaft 4-2-2 corresponding to the middle part 4-2-1-3 of the motor housing (which can be seen from Figure 13 , Figure 20As shown in the schematic diagram, multiple braking mounting holes 4-2-1-8 are provided in the middle part 4-2-1-3 of the motor housing. A braking shaft 4-2-1-9 for embedding into the groove hole 4-2-2-2 to achieve emergency stop and locking is telescopically arranged in the braking mounting hole 4-2-1-8. A compression spring 4-2-1-10 for driving the braking shaft 4-2-1-9 to move away from the groove hole 4-2-2-2 is arranged in the braking mounting hole 4-2-1-8. An emergency stop air airway 4-1-10 that communicates with the braking mounting hole 4-2-1-8 after the air motor 4-2 is installed is provided on the atomizer base 4-1. A plurality of exhaust holes 4-2-1-11 are provided on the circumferential side of the lower part 4-2-1-2 of the motor housing. An exhaust air airway 4-1-11 that communicates with the exhaust hole 4-2-1-11 after the air motor 4-2 is installed is provided on the atomizer base 4-1. There is an airway structure between the electrostatic high-voltage generator assembly 5 and the atomizing rotary air flow control unit 6 for delivering the required compressed air to the air motor 4-2.

[0042] As Figure 22 and Figure 23 shown, a fiber optic speed measurement pulse sensor 5-3 for measuring the rotational speed of the air motor 4-2 is provided between the electrostatic high-voltage generator assembly 5 and the atomizer base 4-1. The bottom of the driving impeller 4-2-2-1 of the air motor 4-2 has a circular ring part with four equal parts of black and metallic natural color spaced apart. The fiber optic speed measurement pulse sensor 5-3 calculates the actual rotational speed of the motor by receiving pulses through fiber optic irradiation with black absorption and metallic natural color reflection. The fiber optic speed measurement pulse sensor 5-3 is installed on the electrostatic high-voltage generator assembly 5, and an installation channel for the fiber of the fiber optic speed measurement pulse sensor 5-3 to extend to the driving impeller 4-2-2-1 is provided between the electrostatic high-voltage generator assembly 5 and the atomizer base 4-1.

[0043] As Figure 1 , Figure 24 shown, a positive pressure purge air channel (not marked in the figure) is formed between the main shaft 4-2-2 of the air motor 4-2 and the paint delivery pipe 4-3. A positive pressure purge air airway 4-1-12 that communicates with the positive pressure purge air channel after the air motor 4-2 is installed is provided on the atomizer base 4-1. There is an airway structure between the electrostatic high-voltage generator assembly 5 and the atomizing rotary air flow control unit 6 for communicating with the positive pressure purge air airway 4-1-12.

[0044] As Figure 1 , Figure 8 , Figure 25 and Figure 26 shown, a second cleaning agent supply pipeline 4-1-13 and a sewage pipeline 4-1-14 are provided on the atomizer base 4-1 ( Figure 25The middle pipeline is separated from the atomizer base 4-1 for illustration. The ends of the second cleaning agent supply pipeline 4-1-13 and the sewage discharge pipeline 4-1-14 are connected in parallel. The inlet end on the atomizer base 4-1 is connected to the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15 of the second cleaning agent supply pipeline 4-1-13 and the sewage discharge pipeline 4-1-14. A connecting pipeline 4-1-16 is provided on the atomizer base 4-1 to connect the output end of the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15 and the inlet end of the first 2-position 2-way pneumatically controlled pilot valve 4-1-3. The first 2-position 2-way pneumatically controlled pilot valve 4-1-3 simultaneously controls whether the paint supply pipeline 4-1-1 and the connecting pipeline 4-1-16 are connected to the inner pipe body 4-3-1 of the paint delivery pipe 4-3. When the paint color needs to be switched, the following operation steps are carried out: S1 Open the first 2-position 2-way pneumatically controlled pilot valve 4-1-3 and the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15. A stream of cleaning agent is conveyed along the second cleaning agent supply pipeline 4-1-13 and the connecting pipeline 4-1-16 to the inner pipe body 4-3-1 of the paint delivery pipe 4-3 and flows out from the cup assembly 1, realizing the cleaning of the inner pipe body 4-3-1 of the paint delivery pipe 4-3. Another stream of cleaning agent is conveyed along the second cleaning agent supply pipeline 4-1-13, the connecting pipeline 4-1-16, and the paint supply pipeline 4-1-1 to the pipeline structure for conveying paint between the electrostatic high-voltage generator 5-2 assembly 5 and the atomizing rotary air flow control unit 6, realizing the cleaning of the pipeline for the paint supply source; S2 After the cleaning is completed, connect another color of paint, close the first 2-position 2-way pneumatically controlled pilot valve 4-1-3, and open the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15. The paint mixed with the residual cleaning agent flows out along the paint supply pipeline 4-1-1, the connecting pipeline 4-1-16, and the sewage discharge pipeline 4-1-14. The cleaning agent from the second cleaning agent supply pipeline 4-1-13 enters the sewage discharge pipeline 4-1-14 under the action of the conveying pressure; S3 Finally, open the first 2-position 2-way pneumatically controlled pilot valve 4-1-3 and close the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15 to spray the new paint color.

[0045] As Figure 1 , Figure 23 and Figure 27 shown, the electrostatic high-voltage generator assembly 5 includes a mounting base 5-1 and an electrostatic high-voltage generator 5-2 provided in the mounting base 5-1. The atomizer base 4-1 is mounted on the mounting base 5-1. The mounting base 5-1 is integrated with a plurality of first partition air ducts respectively communicating with the compressed air required at the atomizer base assembly 4, and the mounting base 5-1 is integrated with a plurality of first partition liquid pipelines respectively communicating with the required liquid at the atomizer base assembly 4. The paint electrostatic induction conductive structure 4-4 (cooperating Figure 7)(It is) used to transfer the charge of the electrostatic high-voltage generator assembly 5 to the paint delivery pipe 4-3 to realize the charge-carrying function of the paint delivery pipe 4-3; the paint electrostatic induction conductive structure 4-4 includes a socket 4-4-1 provided on the atomizer base 4-1, a conductive ring 4-4-2 electrically connected to the socket 4-4-1, and a first conductive rod 4-4-3 connected between the lock nut 4-3-5 of the paint delivery pipe 4-3 and the conductive ring 4-4-2; a plug 5-1-1 electrically connected to the electrostatic high-voltage generator 5-2 and a second conductive rod 5-1-2 electrically connected to the plug 5-1-1 are provided on the mounting base 5-1; when the atomizer base 4-1 is mounted on the mounting base 5-1, the second conductive rod 5-1-2 is electrically connected to the socket 4-4-1 to realize the charge-carrying function of the paint delivery pipe 4-3.

[0046] As Figure 1 , Figure 7 , Figure 28 and Figure 29 shown, the atomizing rotary air flow control unit 6 is used to be connected to the robot end flange and for the mounting base 5-1 to be mounted thereon. A plurality of second partition air channels respectively communicating with the first partition air channels on the mounting base 5-1 are integrated on the atomizing rotary air flow control unit 6, and a plurality of second partition liquid pipelines respectively communicating with the first partition liquid pipelines on the mounting base 5-1 are integrated on the atomizing rotary air flow control unit 6. There are three groups of step flow control valves 6-1 and an outlet gas flow sensor 6-2 in the atomizing rotary air flow control unit 6. The valve core of the step flow control valve 6-1 controls the air output flow rate, and the outlet gas flow sensor 6-2 is configured to accurately and finitely detect the real-time output gas flow rate; two of the groups of step flow control valves 6-1 and the outlet gas flow sensor 6-2 are respectively used to control the air pressure values of the outer shaping air and the inner shaping air; the remaining group of step flow control valves 6-1 and the outlet gas flow sensor 6-2 are used to control the air pressure value of the compressed air entering the rotary air airway 4-1-9.

[0047] The electrostatic rotary cup spray gun has the following implementation effects: (1) During the operation of the electrostatic rotary cup spray gun, the paint is transported to the rotary cup assembly 1, and the rotary cup assembly 1 is driven to rotate at a high speed by the air motor 4-2. The rotary cup assembly 1 atomizes the paint through the centrifugal force of rotation. At the same time, since there is a structure between the electrostatic high-voltage generator 5-2 and the atomizer base assembly 4 that transports charges to the structure that realizes the paint transportation function to realize the charge-carrying function of the paint, so that the atomized paint particles carry static electricity. Due to the electrostatic induction effect, the paint particles are overall negatively charged with high voltage. Like charges repel each other, and thus are dispersed into paint particles with a smaller particle diameter, thereby ensuring the spraying effect and coating quality. At the same time, there is a self-cleaning function between the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomization rotary air flow control unit 6 to clean the rotary cup assembly 1 and the structure that realizes the paint transportation function, ensuring that there are no impurities during the color-changing paint switching and process cleaning. In addition, there is a function between the shaping air ring assembly 2, the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomization rotary air flow control unit 6 to quantitatively adjust the cyclone angle and range of the shaping air, achieving the effect of precisely adjusting the spray pattern size of the paint atomization particles. Finally, it has the characteristics of cleaning the inner and outer surfaces of the rotary cup and the paint delivery pipe 4-3, accurately controlling the on-off of the paint supply, no impurities during the color-changing paint switching and process cleaning, and closed-loop control of the rotary cup speed and the atomization shaping air intake volume for precise regulation.

[0048] (2) During the atomized spraying process of the coating, the coating flows along the annular diversion channel 1-3-4 between the inner tube body 4-3-1 of the paint delivery pipe 4-3, the gap between the mounting seat 1-3-1 and the diversion plate 1-3-2, and the inner wall of the rotary cup body 1-1. During this process, the conical protrusion 1-3-2-1 on the diversion plate 1-3-2 is provided, so that the diversion performance is less affected by the spraying attitude inclination angle, and can effectively and evenly divert, and the performance gets better with the increase of the flow rate. And during the rotation of the rotary cup body 1-1, due to the centrifugal force and the diversion groove 1-1-1, the coating is atomized to form high-quality fine and uniform coating particles. At the same time, due to the electrostatic induction effect, the whole coating is negatively charged with high voltage, and like charges repel each other, so it is further dispersed into coating particles with smaller particle diameters, thus ensuring the spraying effect and the coating quality. During the cleaning process of the rotary cup assembly 1, the cleaning agent flows along the sandwich channel between the inner tube body 4-3-1 and the outer tube body 4-3-2 of the paint delivery pipe 4-3. When the set cleaning agent pressure is reached, the expansion overflow sleeve 4-3-4 opens, and the cleaning agent bulges out from the expansion overflow sleeve 4-3-4 to the annular groove 1-1-2 of the rotary cup body 1-1 and is divided into three fluid paths: (1) The cleaning agent first flows out through the annular groove 1-1-2 and multiple inclined holes 1-1-3 to the annular overflow channel 1-4 between the outer cleaning overflow ring 1-2 and the rotary cup body 1-1, and then flows to the outside of the rotary cup body 1-1 to realize the external cleaning function of the rotary cup body 1-1; (2) Through the gap between the inner tube body 4-3-1 of the paint delivery pipe 4-3 and the central hole of the mounting seat 1-3-1, along the flow path of the coating spraying, it flows to the inside of the rotary cup body 1-1 to realize the internal cleaning function of the rotary cup body 1-1; (3) It flows out through the liquid leakage hole 1-3-2-2 of the diversion plate 1-3-2 to the surface of the diversion plate 1-3-2 far from the mounting seat 1-3-1 to realize cleaning; finally, the all-round cleaning function of the rotary cup assembly 1 is realized.

[0049] (3) First, the external shaping air flows along the first through hole 2-2-1, the first annular cavity 2-1-1, the second through hole 2-1-2, the second annular cavity 2-3-1, the third through hole 2-3-2, and the third annular cavity 2-4-1 and is discharged from the external shaping air outlet hole 2-4-2. The internal shaping air flows along the fourth cavity 2-1-3, the fifth annular cavity 2-3-3, the fourth through hole 2-3-4, and the sixth annular cavity 2-4-3 and is discharged from the internal shaping air outlet hole 2-4-4. At this time, the atomized rotary air flow control unit 6 is used to adjust the air pressure values of the external shaping air and the internal shaping air, and perform vector superposition on the shaping air. When the air pressure of the external shaping air is higher than that of the internal shaping air, the atomized spray width of the coating shrinks inward; when the air pressure of the external shaping air is lower than that of the internal shaping air, the atomized spray width of the coating expands outward. Thus, the cyclone angle and range of the shaping air can be quantitatively adjusted to achieve the effect of accurately adjusting the spray width of the atomized coating particles.

[0050] (4) In the atomizer base assembly 4, there is a pipeline structure that connects the paint supply pipeline 4-1-1 and the first cleaning agent supply pipeline 4-1-2 on the atomizer base 4-1, between the electrostatic high-voltage generator assembly 5 and the atomized rotary air flow control unit 6, so as to realize the transportation of paint and cleaning agent. After cleaning the cup assembly 1, by opening the third 2-position 2-way pneumatic pilot valve 4-1-6, the purging air is made to flow along the cleaning path of the cleaning agent, and finally the function of blowing and drying the inner and outer surfaces of the cup assembly 1 after cleaning with the cleaning agent is realized. Similarly, an outer shaping air airway 4-1-7 communicating with a plurality of first through holes 2-2-1 is formed in the atomizer base 4-1, and an inner shaping air airway 4-1-8 communicating with the fourth cavity 2-1-3 is formed between the inside of the atomizer base 4-1 and between the atomizer base 4-1 and the outer shaping air enclosure 4-5. There is an airway structure that connects the outer shaping air airway 4-1-7 and the inner shaping air airway 4-1-8, between the electrostatic high-voltage generator assembly 5 and the atomized rotary air flow control unit 6, to realize the transportation of outer shaping air and inner shaping air. At the same time, since most paints are flammable, the air motor 4-2 uses compressed air as the driving force to ensure safety. In addition, the paint electrostatic induction conductive structure 4-4 is used to transport the charge of the electrostatic high-voltage generator assembly 5 to the paint delivery pipe 4-3, to realize the function of the paint delivery pipe 4-3 being charged.

[0051] (5) The air motor 4-2 is provided with the following functions: (1) High-speed rotation function: The main shaft 4-2-2 of the air motor 4-2 is connected through an air-floating plane bearing 4-2-3, a first static pressure graphite air-floating bearing 4-2-4, and a second static pressure graphite air-floating bearing 4-2-5, so that the main shaft 4-2-2 is in a suspended state, providing a 0-friction condition for the high-speed rotation of the main shaft 4-2-2; (2) Main shaft 4-2-2 rotation function: Compressed air enters along the rotating air air passage 4-1-9 and a plurality of rotating air inlets 4-2-1-6, so as to drive the driving impeller 4-2-2-1 and the main shaft 4-2-2 to rotate at high speed; (3) Main shaft 4-2-2 braking function: Compressed air enters along the atomizer base 4-1 air passage structure and the decelerating air air passage 4-2-1-12, reacting on the impeller, so as to reduce the rotation speed of the main shaft 4-2-2; (4) Main shaft 4-2-2 emergency stop function: Compressed air enters into the braking mounting hole 4-2-1-8 along the emergency stop air passage, overcoming the elastic force of the compression spring 4-2-1-10 to make the braking shaft 4-2-1-9 move downward to the groove hole 4-2-2-2 of the main shaft 4-2-2, and realizing the emergency stop and locking function by the impact between the braking shaft 4-2-1-9 and the groove hole 4-2-2-2 of the main shaft 4-2-2. At the same time, after the compressed air supply stops, the compression spring 4-2-1-10 drives the braking shaft 4-2-1-9 to reset; (5) Compressed air discharge function: All kinds of compressed air entering the air motor 4-2 are discharged along the exhaust hole 4-2-1-11 and the exhaust air air passage 4-1-11 after doing work. There is no need for an air heater, avoiding the condensation of the air passage structures at the atomizer base 4-1 and the air passage structures of the air motor 4-2.

[0052] (6) The bottom of the driving impeller 4-2-2-1 of the air motor 4-2 is a circular shape with four equal parts of black and metal natural color spaced from each other. The fiber optic speed measurement pulse sensor 5-3 calculates the actual rotation speed of the motor through the pulses received by fiber optic irradiation of black absorption and metal natural color reflection.

[0053] (7) When the electrostatic rotary cup spray gun is spraying paint at a certain elevation angle during the paint spraying process, when the paint is pumped into the rotary cup assembly 1 from the paint supply pipe 4-3, due to the gap between the static paint supply pipe 4-3 and the rotating rotary assembly, some paint will enter the cavity formed between the main shaft 4-2-2 of the air motor 4-2 and the paint supply pipe 4-3, causing accumulation pollution. Therefore, during the spraying process, positive pressure purging is carried out through compressed air along the positive pressure purging air air passage 4-1-12 and the positive pressure purging air channel, preventing some paint particles from falling into the cavity formed between the paint supply pipe 4-3 and the main shaft 4-2-2 of the air motor 4-2 and causing pollution.

[0054] (8) When the paint color needs to be switched, the following operating steps are carried out: S1 Open the first 2-position 2-way pneumatically controlled pilot valve 4-1-3 and the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15. A stream of cleaning agent is transported along the second cleaning agent supply pipeline 4-1-13 and the connecting pipeline 4-1-16 to the inner pipe body 4-3-1 of the paint delivery pipe 4-3 and flows out from the cup assembly 1, realizing the cleaning of the inner pipe body 4-3-1 of the paint delivery pipe 4-3. Another stream of cleaning agent flows along the second cleaning agent supply pipeline 4-1-13, the connecting pipeline 4-1-16, and the paint supply pipeline 4-1-1 to the pipeline structure for transporting paint between the electrostatic high-voltage generator 5-2 assembly 5 and the atomizing rotary air flow control unit 6, realizing the cleaning of the pipeline for the paint supply source; S2 After the cleaning is completed, connect another color of paint, close the first 2-position 2-way pneumatically controlled pilot valve 4-1-3, and open the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15. The paint mixed with the residual cleaning agent flows out along the paint supply pipeline 4-1-1, the connecting pipeline 4-1-16, and the sewage discharge pipeline 4-1-14. The cleaning agent from the second cleaning agent supply pipeline 4-1-13 enters the sewage discharge pipeline 4-1-14 under the action of the conveying pressure; S3 Finally, open the first 2-position 2-way pneumatically controlled pilot valve 4-1-3 and close the fourth 2-position 2-way pneumatically controlled pilot valve 4-1-15 to spray the new paint color and ensure the quality of the color change spraying.

[0055] (9) The paint electrostatic induction conductive structure 4-4 includes a socket 4-4-1 provided on the atomizer base 4-1, a conductive ring 4-4-2 electrically connected to the socket 4-4-1, and a first conductive rod 4-4-3 connected between the lock nut 4-3-5 of the paint delivery pipe 4-3 and the conductive ring 4-4-2; a plug 5-1-1 electrically connected to the electrostatic high-voltage generator 5-2 and a second conductive rod 5-1-2 electrically connected to the plug 5-1-1 are provided on the mounting base 5-1; when the atomizer base 4-1 is mounted on the mounting base 5-1, the second conductive rod 5-1-2 is electrically connected to the socket 4-4-1, realizing the charged function of the paint delivery pipe 4-3.

[0056] (10) Two of the step flow control valves 6-1 and the outlet gas flow sensors 6-2 are respectively used to control the air pressure values of the outer shaping air and the inner shaping air, so as to realize real-time closed-loop feedback control of the air pressure values of the two inner and outer shaping airs, and perform vector superposition on the shaping air. When the air pressure of the outer shaping air is higher than that of the inner shaping air, the coating atomization spray pattern shows a contraction inward; when the air pressure of the outer shaping air is less than that of the inner shaping air, the coating atomization spray pattern shows an expansion inward; thus, the cyclone angle and range of the shaping air can be quantitatively adjusted to achieve the effect of accurately adjusting the spray pattern size of the coating atomization particles. The remaining set of step flow control valves 6-1 and the outlet gas flow sensors 6-2 are used to control the air pressure value of the compressed air entering the rotary air airway 4-1-9, so as to realize real-time closed-loop feedback control of the rotational speed of the main shaft 4-2-2 of the air motor 4-2 (i.e., the rotational speed of the cup assembly 1).

[0057] This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively according to needs, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An electrostatic rotary cup spray gun, characterized in that: It includes a cup assembly (1), a shaping air ring assembly (2), an atomizer protective housing (3), an atomizer base assembly (4) with an air motor (4-2), an electrostatic high-voltage generator assembly (5), and an atomizing rotary air flow control unit (6). The electrostatic high-voltage generator assembly (5) is installed on the atomizing rotary air flow control unit (6). The atomizer base assembly (4) is installed on the electrostatic high-voltage generator assembly (5). The shaping air ring assembly (2) is installed on the atomizer base assembly (4). The cup assembly (1) is located inside the shaping air ring assembly (2) and is installed on the air motor (4-2). The atomizer protective housing (3) is installed on the atomizer base assembly (4) to protect the atomizer base assembly (4) and the shaping air ring assembly (2). The cup assembly (1) atomizes the paint by the centrifugal force of rotation. Between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6), there is a paint delivery function to deliver the paint to the cup assembly (1). Between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6), there is a self-cleaning function to clean the cup assembly (1) and the structure where the paint delivery function is realized. Between the shaping air ring assembly (2), the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6), there is a function to quantitatively adjust the cyclone angle and range of the shaping air. Between the electrostatic high-voltage generator (5-2) and the atomizer base assembly (4), there is a function to transfer charges to the structure where the paint delivery function is realized to achieve the charged paint function.

2. The electrostatic rotary cup spray gun according to claim 1, wherein: The cup assembly (1) includes a cup body (1-1) threadedly connected to the main shaft (4-2-2) of the air motor (4-2), an outer cup cleaning overflow ring (1-2) provided on the outer side of the cup body (1-1), and a diverter (1-3) provided inside the cup body (1-1). An ink delivery pipe (4-3) passing through the main shaft (4-2-2) of the air motor (4-2) is provided on the atomizer base assembly (4). The ink delivery pipe (4-3) is used to deliver paint or cleaning agent to the cup assembly (1). Between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6), there is a pipeline structure for delivering paint or cleaning agent to the ink delivery pipe (4-3). A plurality of diversion grooves (1-1-1) are circumferentially arranged at the inner edge of the opening of the cup body (1-1).

3. The electrostatic rotary cup spray gun according to claim 2, wherein: An annular groove (1-1-2) is provided in the middle of the cup body (1-1). An annular overflow channel (1-4) is formed between the outer cup cleaning overflow ring (1-2) and the cup body (1-1). A plurality of inclined holes (1-1-3) are circumferentially arranged on the cup body (1-1), with one end communicating with the annular groove (1-1-2) and the other end communicating with the annular overflow channel (1-4). The diverter (1-3) includes a mounting seat (1-3-1) installed inside the cup body (1-1) and on one side of the annular groove (1-1-2), a diverter plate (1-3-2) installed on the mounting seat (1-3-1) and spaced from the mounting seat (1-3-1), and a mounting sleeve (1-3-3) installed inside the cup body (1-1) and on the other side of the annular groove (1-1-2). A conical protrusion (1-3-2-1) is provided in the middle of the end face of the diverter plate (1-3-2) close to the mounting seat (1-3-1). An annular diversion channel (1-3-4) is formed between the circumferential side of the diverter plate (1-3-2) and the inner wall of the cup body (1-1). A plurality of liquid leakage holes (1-3-2-2) penetrating through both end faces are circumferentially arranged on the circumferential side of the diverter plate (1-3-2) located at the conical protrusion (1-3-2-1). The surface of the diverter plate (1-3-2) far from the mounting seat (1-3-1) is in an inner conical shape.

4. The electrostatic rotary cup spray gun according to claim 3, wherein: The paint delivery pipe (4-3) includes an inner pipe body (4-3-1), an outer pipe body (4-3-2) arranged on the circumferential side of the inner pipe body (4-3-1), a gun head sealing nut (4-3-3) arranged at one end of the outer pipe body (4-3-2) close to the cup assembly (1), an expansion overflow sleeve (4-3-4) arranged between the gun head sealing nut (4-3-3) and the inner pipe body (4-3-1), and a locking nut (4-3-5) arranged at one end of the outer pipe body (4-3-2) far from the cup assembly (1). The inner pipe body (4-3-1) is used for delivering paint, and the sandwich channel formed between the inner pipe body (4-3-1) and the outer pipe body (4-3-2) is used for delivering cleaning agent. When the pressure of the cleaning agent in the sandwich channel is greater than the set value, the cleaning agent bulges out from the expansion overflow sleeve (4-3-4). The paint delivery pipe (4-3) is used for delivering paint to the cup assembly (1) for painting, and the paint delivery pipe (4-3) is used for outputting the cleaning agent to the cup assembly (1) for cleaning. One end of the inner pipe body (4-3-1) of the paint delivery pipe (4-3) passes through the central hole of the mounting sleeve (1-3-3) and is embedded in the central hole of the mounting seat (1-3-1). There is a clearance between the outer wall of the inner pipe body (4-3-1) and the inner wall of the central hole of the mounting seat (1-3-1). The gun head sealing nut (4-3-3) is embedded in the central hole of the mounting sleeve (1-3-3).

5. The electrostatic rotary cup spray gun according to claim 1, wherein: The shaping air ring assembly (2) includes a shaping ring mounting body (2-1), an annular fixing plate (2-2) installed by being embedded from one end of the shaping ring mounting body (2-1) away from the cup assembly (1), an inner ring of the air outlet component (2-3) installed by being embedded from the other end of the shaping ring mounting body (2-1), and an outer ring of the air outlet component (2-4) installed by being embedded from the other end of the shaping ring mounting body (2-1) and cooperating with the inner ring of the air outlet component (2-3); A plurality of outer shaping air outlet holes (2-4-2) are circumferentially arrayed on the end face of the outer ring of the air outlet component (2-4); an outer shaping air duct structure communicating with the outer shaping air outlet holes (2-4-2) is formed among the annular fixing plate (2-2), the shaping ring mounting body (2-1), the inner ring of the air outlet component (2-3), and the outer ring of the air outlet component (2-4); A plurality of inner shaping air outlet holes (2-4-4) are circumferentially arrayed on the end face of the inner ring of the air outlet component (2-3), and an inner shaping air duct structure communicating with the inner shaping air outlet holes (2-4-4) is formed among the shaping ring mounting body (2-1), the inner ring of the air outlet component (2-3), and the outer ring of the air outlet component (2-4); One circle of the outer shaping air outlet holes (2-4-2) is located on the outer circle of one circle of the inner shaping air outlet holes (2-4-4), and one circle of the outer shaping air outlet holes (2-4-2) and one circle of the inner shaping air outlet holes (2-4-4) are used to surround the circumferential side of the cup assembly (1).

6. The electrostatic rotary cup spray gun according to claim 5, characterized in that: A plurality of first through holes (2-2-1) are circumferentially arrayed on the annular fixing plate (2-2), a first annular cavity (2-1-1) communicating with the plurality of first through holes (2-2-1) is arranged in the shaping ring mounting body (2-1), a plurality of second through holes (2-1-2) communicating with the first annular cavity (2-1-1) are arranged on the shaping ring mounting body (2-1), a second annular cavity (2-3-1) communicating with the plurality of second through holes (2-1-2) is arranged on the inner ring of the air outlet component (2-3), a plurality of third through holes (2-3-2) communicating with the second annular cavity (2-3-1) are circumferentially arrayed on the circumferential side of the inner ring of the air outlet component (2-3), and a third annular cavity (2-4-1) communicating with the plurality of third through holes (2-3-2) is arranged on the outer ring of the air outlet component (2-4); the first through holes (2-2-1), the first annular cavity (2-1-1), the second through holes (2-1-2), the second annular cavity (2-3-1), the third through holes (2-3-2), and the third annular cavity (2-4-1) constitute an outer shaping air duct structure, and the outer shaping air outlet holes (2-4-2) communicate with the third annular cavity (2-4-1); an air duct structure for delivering outer shaping air to the plurality of first through holes (2-2-1) exists among the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6).

7. The electrostatic rotary cup spray gun according to claim 5, wherein: A fourth cavity (2-1-3) is provided on the circumferential side of the shaping ring mounting body (2-1). A fifth annular cavity (2-3-3) communicating with the fourth cavity (2-1-3) is provided on the inner ring (2-3) of the air outlet component. A plurality of fourth through holes (2-3-4) communicating with the fifth annular cavity (2-3-3) are arranged in a circumferential array on the end surface of the inner ring (2-3) of the air outlet component. A sixth annular cavity (2-4-3) communicating with the fourth through holes (2-3-4) is provided on the outer ring (2-4) of the air outlet component; the fourth cavity (2-1-3), the fifth annular cavity (2-3-3), and the fourth through holes (2-3-4) form an inner shaping air duct structure, and the inner shaping air outlet holes (2-4-4) communicate with the sixth annular cavity (2-4-3); there is an air duct structure for outputting inner shaping air between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6).

8. The electrostatic rotary cup spray gun according to claim 5, characterized in that: The atomizer base assembly (4) includes an atomizer base (4-1) for mounting on the electrostatic high-voltage generator assembly (5), an air motor (4-2) provided on the atomizer base (4-1), a paint supply pipe (4-3) provided on the atomizer base (4-1) and passing through the main shaft (4-2-2) of the air motor (4-2), a paint electrostatic induction conductive structure (4-4), and a shaping air enclosure (4-5) provided on the circumferential side of the atomizer base (4-1); A paint supply pipeline (4-1-1) communicating with the inner pipe body (4-3-1) of the paint supply pipe (4-3) is provided on the atomizer base (4-1). A first cleaning agent supply pipeline (4-1-2) communicating with the sandwich channel between the outer pipe body (4-3-2) and the inner pipe body (4-3-1) of the paint supply pipe (4-3) is provided on the atomizer base (4-1). A first 2-position 2-way pneumatically controlled pilot valve (4-1-3) for controlling the on / off of the paint supply pipeline (4-1-1) is provided on the atomizer base (4-1). A second 2-position 2-way pneumatically controlled pilot valve (4-1-4) for controlling the on / off of the first cleaning agent supply pipeline (4-1-2) is provided on the atomizer base (4-1). There is a pipeline structure for communicating the paint supply pipeline (4-1-1) and the first cleaning agent supply pipeline (4-1-2) between the electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6); A purging air duct (4-1-5) communicating with the sandwich channel between the outer pipe body (4-3-2) and the inner pipe body (4-3-1) of the paint supply pipe (4-3) is provided on the atomizer base (4-1). A three 2-position 2-way pneumatically controlled pilot valve (4-1-6) for controlling the on / off of the purging air duct (4-1-5) is provided on the atomizer base (4-1). There is an air duct structure for communicating the purging air duct (4-1-5) between the electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6); The shaping ring mounting body (2-1) of the shaping air ring assembly (2) is connected between the atomizer base (4-1) and the shaping air enclosure (4-5). An external shaping air airway (4-1-7) communicating with a plurality of first through holes (2-2-1) is formed in the atomizer base (4-1). An internal shaping air airway (4-1-8) communicating with the fourth cavity (2-1-3) is formed inside the atomizer base (4-1) and between the atomizer base (4-1) and the external shaping air enclosure (4-5). An airway structure communicating the external shaping air airway (4-1-7) and the internal shaping air airway (4-1-8) is provided between the electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6); The air motor (4-2) uses compressed air as the driving force, and the main shaft (4-2-2) of the air motor (4-2) is threadedly connected to the cup body (1-1) of the cup assembly (1); The paint electrostatic induction conductive structure (4-4) is used to transfer the charge of the electrostatic high-voltage generator assembly (5) to the paint delivery pipe (4-3) to realize the charged function of the paint delivery pipe (4-3).

9. The electrostatic rotary cup spray gun according to claim 8, wherein: The air motor (4-2) includes a motor housing (4-2-1), a main shaft (4-2-2), an air floating plain bearing (4-2-3), a first static pressure graphite air floating bearing (4-2-4), a second static pressure graphite air floating bearing (4-2-5), and a speed measuring structure for measuring the rotational speed of the main shaft (4-2-2); the motor housing (4-2-1) includes a motor housing bottom (4-2-1-1), a lower part of the motor housing (4-2-1-2) provided on the motor housing bottom (4-2-1-1), a middle part of the motor housing (4-2-1-3) provided on the lower part of the motor housing (4-2-1-2), and an upper part of the motor housing (4-2-1-4) provided on the middle part of the motor housing (4-2-1-3); the air floating plain bearing (4-2-3) is arranged between the main shaft (4-2-2) and the motor housing bottom (4-2-1-1), the first static pressure graphite air floating bearing (4-2-4) is arranged between the lower part of the motor housing (4-2-1-2) and the main shaft (4-2-2), and the second static pressure graphite air floating bearing (4-2-5) is arranged between the upper part of the motor housing (4-2-1-4) and the main shaft (4-2-2); A bearing air airway (4-2-1-5) for supplying air to the air floating plain bearing (4-2-3), the first static pressure graphite air floating bearing (4-2-4), and the second static pressure graphite air floating bearing (4-2-5) is provided inside the motor housing (4-2-1); a driving impeller (4-2-2-1) driven by gas to rotate is arranged at the tail end of the main shaft (4-2-2), and a plurality of rotary air inlets (4-2-1-6) communicating with the driving impeller (4-2-2-1) are provided on the lower part of the motor housing (4-2-1-2); A deceleration air airway (4-2-1-12) communicating with the drive impeller (4-2-2-1) is provided between the bottom (4-2-1-1) and the lower part (4-2-1-2) of the motor housing; A plurality of groove holes (4-2-2-2) are arranged in a circumferential array on the circumference of the main shaft (4-2-2) corresponding to the middle part (4-2-1-3) of the motor housing, and a braking structure for embedding into the groove holes (4-2-2-2) to achieve emergency stop and locking is provided in the middle part (4-2-1-3) of the motor housing; A plurality of exhaust holes (4-2-1-11) are arranged on the circumference of the lower part (4-2-1-2) of the motor housing.

10. The electrostatic rotary cup spray gun according to claim 9, characterized in that: A plurality of brake air input mounting holes are provided in the middle part (4-2-1-3) of the motor housing. The braking structure includes a plurality of brake shafts (4-2-1-9) respectively telescopically arranged in the brake air input mounting holes and used for embedding into the groove holes (4-2-2-2) to achieve emergency stop and locking, and a plurality of compression springs (4-2-1-10) arranged in the brake air input mounting holes and driving the brake shafts (4-2-1-9) to move away from the groove holes (4-2-2-2).

11. The electrostatic rotary cup spray gun according to claim 9, wherein: The bottom of the drive impeller (4-2-2-1) has a circular ring part with four equal parts of black and metallic color alternately arranged. The speed measuring structure is an optical fiber speed measuring pulse sensor (5-3), and the optical fiber speed measuring pulse sensor (5-3) calculates the actual speed of the motor by receiving the pulses of black absorption and metallic color reflection irradiated by the optical fiber.

12. The electrostatic rotary cup spray gun according to claim 8, wherein: An optical fiber speed measuring pulse sensor (5-3) for measuring the speed of the air motor (4-2) is provided between the electrostatic high voltage generator assembly (5) and the atomizer base (4-1). The bottom of the drive impeller (4-2-2-1) of the air motor (4-2) has a circular ring part with four equal parts of black and metallic color alternately arranged. The optical fiber speed measuring pulse sensor (5-3) calculates the actual speed of the motor by receiving the pulses of black absorption and metallic color reflection irradiated by the optical fiber. The optical fiber speed measuring pulse sensor (5-3) is installed on the electrostatic high voltage generator assembly (5), and an installation channel for the optical fiber of the optical fiber speed measuring pulse sensor (5-3) to extend to the drive impeller (4-2-2-1) is provided between the electrostatic high voltage generator assembly (5) and the atomizer base (4-1).

13. A kind of electrostatic rotary cup spray gun according to claim 8, characterized in that: A positive pressure purging air channel is formed between the main shaft (4-2-2) of the air motor (4-2) and the paint delivery pipe (4-3). A positive pressure purging air airway (4-1-12) communicating with the positive pressure purging air channel after the air motor (4-2) is installed is provided on the atomizer base (4-1). An airway structure communicating with the positive pressure purging air airway (4-1-12) is provided between the electrostatic high voltage generator assembly (5) and the atomizing rotary air flow control unit (6).

14. A kind of electrostatic rotary cup spray gun according to claim 8, characterized in that: A second cleaning agent supply pipeline (4-1-13) and a sewage discharge pipeline (4-1-14) are provided on the atomizer base (4-1). The ends of the second cleaning agent supply pipeline (4-1-13) and the sewage discharge pipeline (4-1-14) are connected in parallel. A fourth 2-position 2-way pneumatically controlled pilot valve (4-1-15) for connecting the inlet ends of the second cleaning agent supply pipeline (4-1-13) and the sewage discharge pipeline (4-1-14) is provided on the atomizer base (4-1). A connecting pipeline (4-1-16) for connecting the output end of the fourth 2-position 2-way pneumatically controlled pilot valve (4-1-15) and the inlet end of the first 2-position 2-way pneumatically controlled pilot valve (4-1-3) is provided on the atomizer base (4-1). The first 2-position 2-way pneumatically controlled pilot valve (4-1-3) controls whether the paint supply pipeline (4-1-1) and the connecting pipeline (4-1-16) are connected to the inner pipe body (4-3-1) of the paint delivery pipe (4-3) at the same time; When the paint color needs to be switched, the following operation steps are carried out: (S1) Open the first 2-position 2-way pneumatically controlled pilot valve (4-1-3) and the fourth 2-position 2-way pneumatically controlled pilot valve (4-1-15). A stream of cleaning agent is transported along the second cleaning agent supply pipeline (4-1-13) and the connecting pipeline (4-1-16) to the inner pipe body (4-3-1) of the paint delivery pipe (4-3) and flows out from the cup assembly (1), so as to clean the inner pipe body (4-3-1) of the paint delivery pipe (4-3). Another stream of cleaning agent flows along the second cleaning agent supply pipeline (4-1-13), the connecting pipeline (4-1-16), and the paint supply pipeline (4-1-1) to the pipeline structure for transporting paint between the electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6), so as to clean the pipeline of the paint supply source; (S2) After the cleaning is completed, connect another color of paint, close the first 2-position 2-way pneumatically controlled pilot valve (4-1-3), and open the fourth 2-position 2-way pneumatically controlled pilot valve (4-1-15). The paint mixed with the residual cleaning agent flows out along the paint supply pipeline (4-1-1), the connecting pipeline (4-1-16), and the sewage discharge pipeline (4-1-14). The cleaning agent from the second cleaning agent supply pipeline (4-1-13) enters the sewage discharge pipeline (4-1-14) under the action of the conveying pressure; (S3) Finally, open the first 2-position 2-way pneumatically controlled pilot valve (4-1-3) and close the fourth 2-position 2-way pneumatically controlled pilot valve (4-1-15) to spray a new paint color.

15. A kind of electrostatic rotary cup spray gun according to claim 8, characterized in that: The electrostatic high-voltage generator assembly (5) includes a mounting base (5-1) and an electrostatic high-voltage generator (5-2) provided in the mounting base (5-1); the atomizer base (4-1) is mounted on the mounting base (5-1). A plurality of first partition air channels for respectively connecting the compressed air required at the atomizer base assembly (4) are integrated on the mounting base (5-1). A plurality of first partition liquid pipelines for respectively connecting the required liquid at the atomizer base assembly (4) are integrated on the mounting base (5-1).

16. A kind of electrostatic rotary cup spray gun according to claim 15, characterized in that: The electrostatic induction conductive structure (4-4) of the paint includes a socket (4-4-1) provided on the atomizer base (4-1), a conductive ring (4-4-2) electrically connected to the socket (4-4-1), and a first conductive rod (4-4-3) connected between the lock nut (4-3-5) of the paint delivery pipe (4-3) and the conductive ring (4-4-2); a plug (5-1-1) electrically connected to the electrostatic high-voltage generator (5-2) and a second conductive rod (5-1-2) electrically connected to the plug (5-1-1) are provided on the mounting base (5-1); when the atomizer base (4-1) is mounted on the mounting base (5-1), the second conductive rod (5-1-2) is electrically connected to the socket (4-4-1) to realize the charged function of the paint delivery pipe (4-3).

17. A kind of electrostatic rotary cup spray gun according to claim 15, characterized in that: The atomizing rotary air flow control unit (6) is used to be connected to the end flange of the robot and for the mounting base (5-1) to be mounted thereon. A plurality of second partition air channels respectively communicating with the first partition air channels on the mounting base (5-1) are integrated on the atomizing rotary air flow control unit (6), and a plurality of second partition liquid pipelines respectively communicating with the first partition liquid pipelines on the mounting base (5-1) are integrated on the atomizing rotary air flow control unit (6). There are three groups of step flow control valves (6-1) and an outlet gas flow sensor (6-2) in the atomizing rotary air flow control unit (6). The valve core of the step flow control valve (6-1) controls the air output flow rate, and the outlet gas flow sensor (6-2) is configured to accurately and finitely detect the real-time output gas flow rate; two of the step flow control valves (6-1) and the outlet gas flow sensor (6-2) are respectively used to control the air pressure values of the outer shaping air and the inner shaping air; the remaining group of step flow control valves (6-1) and the outlet gas flow sensor (6-2) are used to control the air pressure value of the compressed air entering the rotary air channel (4-1-9).

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