An electrostatic rotary cup spray gun

Abstract

The present invention discloses an electrostatic rotary cup spray gun. The atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have a self-cleaning function for cleaning the rotary cup assembly and the structure that realizes the paint conveying function, thereby ensuring that the color-changing paint switching and the process cleaning are free of impurities; in addition, the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have the function of quantitatively adjusting the cyclone angle and range of the shaping air, thereby achieving the effect of accurately adjusting the spray width of the paint atomized particles; finally, the characteristics of cleaning the inner and outer surfaces of the rotary cup and the paint delivery pipe, accurately switching the paint supply, cleaning the color-changing paint and the process without impurities, and the closed-loop control of the rotary cup rotation speed and the atomizing shaping air intake volume can be precisely regulated.

Description

Technical Field

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

[0002] The electrostatic rotary cup spray gun is a highly efficient spraying device primarily used to apply paint evenly and efficiently to various surfaces. Its operating principle combines electrostatic adsorption with the atomization technology of a high-speed rotary cup. The high-speed rotary cup generates a powerful centrifugal force, atomizing the paint into fine particles that adhere precisely to the surface through electrostatic adsorption.

[0003] For example, the Chinese patent with authorization announcement number CN116618201B and authorization announcement number October 20, 2023 discloses "An Electrostatic Rotary Cup Spray Gun". The electrostatic rotary cup spray gun drives the adjustment column to move horizontally along the operating hole by pushing and pulling the electromagnet, so that the diamond-shaped block is swapped in the changing groove to realize the switching between the straight channel and the V-shaped channel. When the connecting sleeve rotates and drives the auxiliary wheel to enter the V-shaped channel along the directional groove, the atomizing rotary cup can also move telescopically along the axial direction of the rotating shaft while rotating to break up the paint liquid, which can change the air outlet gap between the atomizing rotary cup and the side edge of the isolation cover opening, and then adjust the paint spraying surface in a wave-like manner to avoid the electrostatic rotary cup spray gun from generating spraying dead angles and blind spots when spraying the workpiece.

[0004] However, the above-mentioned electrostatic rotary cup spray gun does not have a function setting for cleaning the rotary cup assembly and the structure that realizes the paint conveying function, and cannot ensure that the color change paint switching and process cleaning are free of impurities. At the same time, the structure for adjusting the cyclone angle and range of the shaping air is complex and inconvenient to operate, and cannot achieve the purpose of accurately adjusting the spray width of the paint atomized 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 supply pipe, precise on and off of paint supply, impurity-free color change paint switching and process cleaning, and precise regulation of the rotary cup speed and the atomization shaping air intake volume through closed-loop control.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an electrostatic rotary cup spray gun, comprising a rotary cup assembly, a shaping air ring assembly, an atomizer protective shell, an atomizer base assembly with an air motor, an electrostatic high-voltage generator assembly, and an atomizing rotary air flow control unit, wherein the electrostatic high-voltage generator assembly is mounted on the atomizing rotary air flow control unit, the atomizer base assembly is mounted on the electrostatic high-voltage generator assembly, the shaping air ring assembly is mounted on the atomizer base assembly, the rotary cup assembly is in the shaping air ring assembly and is mounted on the air motor, the atomizer protective shell is mounted on the atomizer base assembly for protecting the atomizer base assembly and the shaping air ring assembly; the rotary cup assembly rotates by centrifugal force The paint is atomized; the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have a paint conveying function for conveying the paint to the rotary cup assembly; the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have a self-cleaning function for cleaning the rotary cup assembly and the structure that realizes the paint conveying function; the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have a function of quantitatively adjusting the cyclone angle and range of the shaping air; the electrostatic high-voltage generator and the atomizer base assembly have a function of conveying electric charge to the structure that realizes the paint conveying function to realize the charged function of the paint.

[0007] By adopting the above technical solution, during the operation of the electrostatic rotary cup spray gun, the paint is transported to the rotary cup assembly, and the air motor drives the rotary cup assembly to rotate at a high speed. The rotary cup assembly atomizes the paint through the centrifugal force of rotation. At the same time, because the electrostatic high-voltage generator and the atomizer base assembly have the function of transporting electric charge to the structure that realizes the paint transport function, the paint is charged, so that 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 charge, and like charges repel each other, and then dispersed into paint particles with smaller particle diameters, thereby ensuring the spraying effect and coating quality; at the same time, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have a self-cleaning function to clean the rotary cup assembly and the structure that realizes the paint transport function, ensuring that there are no impurities during the color change paint switching and process cleaning; in addition, the shaping air ring assembly, the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotary air flow control unit have the function of quantitatively adjusting the cyclone angle and range of the shaping air, so as to achieve the effect of accurately adjusting the spray width of the paint atomized particles.

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

[0009] The present invention is further configured as follows: an annular groove is provided in the middle of the bell body, an annular overflow channel is formed between the cup outer cleaning overflow ring and the bell body, and a plurality of inclined holes are provided in a circumferential array on the bell body, one end of which is connected to the annular groove and the other end is connected to the annular overflow channel; the diverter includes a mounting seat installed in the bell body and located on one side of the annular groove, a diverter plate installed on the mounting seat and spaced apart from the mounting seat, and a mounting sleeve installed in the bell body and located on the other side of the annular groove, a conical protrusion is provided on the middle of the end face of the diverter plate close to the mounting seat, an annular diverter channel is formed between the circumferential side of the diverter plate and the inner wall of the bell body, a plurality of leakage holes are provided on the circumferential side of the diverter plate located on the circumferential side of the conical protrusion, and the surface of the diverter plate away from the mounting seat is in the shape of an inner cone.

[0010] The present invention is further configured as follows: the paint supply pipe includes an inner tube body, an outer tube body arranged on the circumference of the inner tube body, a gun head sealing nut arranged at one end of the outer tube body close to the bell assembly, an expansion overflow sleeve arranged between the gun head sealing nut and the inner tube body, and a locking nut arranged at one end of the outer tube body away from the bell assembly, the inner tube body is used to transport paint, and the interlayer channel formed between the inner tube body and the outer tube body is used to transport cleaning agent; when the cleaning agent pressure in the interlayer channel is greater than the set value, the cleaning agent bulges out from the expansion overflow sleeve; the paint supply pipe is used to transport the paint to the bell assembly for spraying, and the paint supply pipe is used to output the cleaning agent to the bell assembly for cleaning; one end of the inner tube body of the paint supply pipe passes through the center hole of the mounting sleeve and is embedded in the center hole of the mounting seat, a gap is set between the outer wall of the inner tube body and the inner wall of the center hole of the mounting seat, and the gun head sealing nut is embedded in the center hole of the mounting sleeve.

[0011] By adopting the above three technical solutions, during the paint atomization spraying process, the paint flows along the inner tube body of the paint supply pipe, the gap between the mounting seat and the diverter plate, and the annular diverter channel between the diverter plate and the inner wall of the rotary cup body. During this process, the setting of the conical protrusion on the diverter plate makes the diversion performance less affected by the inclination angle of the spraying posture, and can effectively and evenly divert the flow, and the performance improves with the increase of flow rate; and during the rotation of the rotary cup body, through its centrifugal force and the setting of the diverter groove, the paint is atomized to form high-quality fineness and uniform paint particles. At the same time, due to the electrostatic induction effect, the paint as a whole carries a high-voltage negative charge, and like charges repel each other, and then dispersed into paint particles with smaller particle diameters, thereby ensuring the spraying effect and coating quality. During the cleaning process of the rotary cup assembly, the cleaning agent flows along the interlayer channel between the inner tube body and the outer tube body of the paint supply pipe. When the set cleaning agent pressure is reached, the expansion overflow sleeve opens, and the cleaning agent swells from the expansion overflow sleeve to the annular groove of the rotary 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 cup-outside cleaning overflow ring and the rotary cup body, and then flows to the outside of the rotary cup body to realize the cup-outside cleaning function of the rotary cup body; (2) Through the gap between the inner tube body of the paint supply pipe and the center hole of the mounting seat, along the flow path of the paint spraying, it flows to the inside of the rotary cup body to realize the cup-inside cleaning function of the rotary cup body; (3) It flows out through the leakage hole of the diverter plate to the surface of the diverter plate away from the mounting seat to realize cleaning; finally, a full range of rotary cup assembly cleaning functions are realized.

[0012] The present invention is further configured as follows: the shaping air ring assembly includes a shaping ring mounting body, an annular fixing plate embedded and installed from one end of the shaping ring mounting body away from the rotary cup assembly, an inner ring of an air outlet component embedded and installed from the other end of the shaping ring mounting body, and an outer ring of an air outlet component embedded and installed from the other end of the shaping ring mounting body and matched with the inner ring of the air outlet component; a plurality of external shaping air outlet holes are arranged in a circumferential array on the end surface of the outer ring of the air outlet component; the annular fixing plate, the shaping ring mounting body, the inner ring of the air outlet component, the outlet An outer shaped air duct structure connected to the outer shaped air outlet holes is formed between the outer rings of the air components; a plurality of inner shaped air outlet holes are arranged in a circumferential array on the end face of the inner ring of the air outlet component, and an inner shaped air duct structure connected to the inner shaped air outlet holes is formed between the shaping ring mounting body, the inner ring of the air outlet component and the outer ring of the air outlet component; a circle of the outer shaped air outlet holes is located on the outer circle of a circle of the inner shaped air outlet holes, and a circle of the outer shaped air outlet holes and a circle of the inner shaped air outlet holes are used to surround the circumference of the rotary cup assembly.

[0013] The present invention is further configured as follows: a plurality of first through holes are provided in a circumferential array on the annular fixing plate, a first annular cavity communicating with the plurality of first through holes is provided in the shaping ring mounting body, a plurality of second through holes communicating with the first annular cavity are provided on the shaping ring mounting body, a second annular cavity communicating with the plurality of second through holes is provided on the inner ring of the air outlet component, a plurality of third through holes communicating with the second annular cavity are provided on the circumferential side of the inner ring of the air outlet component, and a third annular cavity communicating with the plurality of third through holes is provided on the outer ring of the air outlet component; the first through hole, the first annular cavity, the second through hole, the second annular cavity, the third through hole, and the third annular cavity constitute an external shaping airway structure, and the external shaping air outlet is communicated with the third annular cavity; an airway structure for conveying external shaping air to the plurality of first through holes is provided between the atomizer base assembly, the electrostatic high-voltage generator assembly, and the atomizing rotating air flow control unit.

[0014] The present invention is further configured as follows: a fourth cavity is provided on the circumferential side of the shaping ring mounting body, a fifth annular cavity communicating with the fourth cavity is provided on the inner ring of the air outlet component, a plurality of fourth through holes communicating with the fifth annular cavity are provided in a circumferential array on the end face of the inner ring of the air outlet component, and a sixth annular cavity communicating with the fourth through hole is provided on the outer ring of the air outlet component; the fourth cavity, the fifth annular cavity and the fourth through hole constitute an internal shaping air duct structure, and the internal shaping air outlet hole is communicated with the sixth annular cavity; an air duct structure for outputting internal shaping air to the fourth cavity is provided between the atomizer base assembly, the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit.

[0015] By adopting the above three technical solutions, first, the external shaping air flows along the first through hole, the first annular cavity, the second through hole, the second annular cavity, the third through hole, and the third annular cavity and is discharged from the external shaping air outlet, and the internal shaping air flows along the fourth cavity, the fifth annular cavity, the fourth through hole, and the sixth annular cavity and is discharged from the internal shaping air outlet; at this time, the air pressure values ​​of the external shaping air and the internal shaping air are adjusted by the atomizing rotating air flow control unit, and the shaping air is vector-superimposed. When the external shaping air pressure is higher than the internal shaping air pressure, the paint atomization spray width shrinks inward; when the external shaping air pressure is lower than the internal shaping air pressure, the paint atomization spray width expands outward; thereby, 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 paint atomization particles.

[0016] The present invention is further configured as follows: the atomizer base assembly includes an atomizer base for installation on an electrostatic high-voltage generator assembly, an air motor arranged on the atomizer base, a paint supply pipe arranged on the atomizer base and passing through the main shaft of the air motor, a paint electrostatic induction conductive structure, and a shaped air sealing cover arranged on the peripheral side of the atomizer base; the atomizer base is provided with a paint supply pipeline connected to the inner tube body of the paint supply pipe, the atomizer base is provided with a first cleaning agent supply pipeline connected to the interlayer channel between the outer tube body and the inner tube body of the paint supply pipe, the atomizer base is provided with a first 2-position 2-way air-controlled pilot valve for controlling the on and off of the paint supply pipeline, the atomizer base is provided with a second 2-position 2-way air-controlled pilot valve for controlling the on and off of the first cleaning agent supply pipeline, a pipeline structure connecting the paint supply pipeline and the first cleaning agent supply pipeline is provided between the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit; the atomizer base is provided with an interlayer channel connecting the outer tube body and the inner tube body of the paint supply pipe. The air duct is blown and cleaned, and a three-position two-way air-controlled pilot valve for controlling the on-off of the air duct is provided on the atomizer base. An air duct structure for connecting the air duct is provided between the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit; the shaping ring mounting body of the shaping air ring assembly is connected between the atomizer base and the shaping air sealing cover, and an external shaping air duct communicating with a plurality of first through holes is formed in the atomizer base, and the inside, the atomizer base and the outside An inner shaping air duct communicating with the fourth cavity is formed between the shaping air enclosure hood, and an air duct structure connecting the outer shaping air duct and the inner shaping air duct is provided between the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit; the air motor uses compressed air as a driving force, and the main shaft of the air motor is threadedly connected to the rotary cup body of the rotary 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, thereby realizing the charging function of the paint delivery pipe.

[0017] By adopting the above technical solution, in the atomizer base assembly, the paint supply pipeline and the first cleaning agent supply pipeline on the atomizer base are equipped with a pipeline structure connecting the paint supply pipeline and the first cleaning agent supply pipeline in conjunction with the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit, thereby realizing the transportation of paint and cleaning agent, and after the rotary cup assembly is cleaned, the third 2-position 2-way air-controlled pilot valve is opened to blow away the clean air and flow along the cleaning path of the cleaning agent, finally realizing the function of blowing and drying the inner and outer surfaces of the rotary cup assembly after cleaning with the cleaning agent; similarly, a plurality of An external shaped air duct communicated with the first through hole, an internal shaped air duct communicated with the fourth cavity is formed inside the atomizer base and between the atomizer base and the external shaped air enclosure cover, and an air duct structure connecting the external shaped air duct and the internal shaped air duct is provided between the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit to realize the transportation of external shaped air and internal shaped air; at the same time, because 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, realizing the charged function of the paint delivery pipe.

[0018] The present invention is further configured as follows: the air motor includes a motor housing, a main shaft, an air-floating plane 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 main shaft speed; the motor housing includes a motor housing bottom, a motor housing lower portion arranged on the motor housing bottom, a motor housing middle portion arranged on the motor housing lower portion, and a motor housing upper portion arranged on the motor housing middle portion; the air-floating plane bearing is an air-floating plane bearing 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 portion of the motor housing and the main shaft, and the second static-pressure graphite air-floating bearing is arranged between the upper portion of the motor housing and the main shaft The motor housing is provided with a bearing air duct for supplying air to the air-floating plane bearing, the first static-pressure graphite air-floating bearing and the second static-pressure graphite air-floating bearing; the tail end of the main shaft is provided with a driving impeller driven to rotate by gas, and the lower part of the motor housing is provided with a plurality of rotating air inlets connected to the driving impeller; a deceleration air duct connected to the driving impeller is provided between the bottom of the motor housing and the lower part of the motor housing; the main shaft is provided with a circumferential array of groove holes corresponding to the middle part of the motor housing, and the middle part of the motor housing is provided with a braking structure for embedding in the groove holes to achieve emergency stop and locking; the circumferential side of the lower part of the motor housing is provided with a plurality of exhaust holes

[0019] The present invention is further configured as follows: a plurality of brake air input mounting holes are provided in the middle of the motor housing, and the brake structure includes a plurality of brake shafts which are respectively telescopically arranged in the brake air input mounting holes and used to be embedded in the groove holes to realize emergency stop locking, and a plurality of compression springs which are arranged in the brake air input mounting holes and drive the brake shafts to move in a direction away from the groove holes.

[0020] The present invention is further configured as follows: a fiber optic speed pulse sensor for measuring the rotational speed of the air motor is arranged between the electrostatic high-voltage generator assembly and the atomizer base; the bottom of the driving impeller of the air motor has a circular ring portion with four equal parts of black and metallic color spaced apart from each other; the fiber optic speed pulse sensor calculates the actual rotational speed of the motor by irradiating the optical fiber with pulses absorbed by the black and reflected by the metallic color; the fiber optic speed pulse sensor is installed on the electrostatic high-voltage generator assembly; an installation channel is provided between the electrostatic high-voltage generator assembly and the atomizer base for the optical fiber of the fiber optic speed pulse sensor to extend to the driving impeller.

[0021] 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 the air-floating plane bearing, the first static-pressure graphite air-floating bearing, and the second static-pressure graphite air-floating bearing, so that the main shaft is in a suspended state, providing zero friction conditions for the high-speed rotation of the main shaft; (2) Main shaft rotation function: Compressed air enters along the rotating air duct and multiple rotating air inlets to drive the impeller and the main shaft to achieve high-speed rotation; (3) Main shaft braking function: Compressed air enters along the air duct structure of the atomizer base and the deceleration air duct, and reacts on the impeller. The main shaft is connected to the wheel to reduce the main shaft speed. (4) The main shaft emergency stop function: the compressed air enters the brake installation hole along the emergency stop air, overcomes the elastic force of the compression spring, and moves the brake shaft toward the groove hole of the main shaft. The emergency stop locking function is achieved by the collision between the brake shaft and the groove hole of the main shaft. At the same time, after the compressed air supply stops, the compression spring drives the brake shaft to reset. (5) The compressed air discharge function: the various compressed air entering the air motor is discharged along the exhaust hole and the exhaust air duct after working. No air heater is required, avoiding condensation in the various air duct structures at the atomizer base and the various air duct structures of the air motor. At the same time, by setting a circular ring with four equal parts of black and metal color spaced apart at the bottom of the driving impeller of the air motor, the optical fiber speed pulse sensor calculates the actual speed of the motor by irradiating the black absorption and metal color reflection pulses received by the optical fiber.

[0022] The present invention is further configured as follows: a positive-pressure purge air channel is formed between the main shaft of the air motor and the paint delivery pipe; a positive-pressure purge air channel is provided on the atomizer base and is connected to the positive-pressure purge air channel after the air motor is installed; an air channel structure connecting the positive-pressure purge air channel is provided between the electrostatic high-voltage generator assembly and the atomizing rotating air flow control unit.

[0023] By adopting the above technical solution, when the electrostatic rotary cup spray gun is spraying at a certain elevation angle during the paint spraying process, when the paint is pumped from the paint supply pipe into the rotary cup assembly, due to the gap between the stationary paint supply pipe and the rotating rotary assembly, part of the paint will enter the cavity between the main shaft of the air motor and the paint supply pipe, causing accumulated pollution. Therefore, during the spraying process, positive pressure blowing is performed along the positive pressure blowing air duct and the positive pressure blowing air channel through compressed air to prevent some paint particles from falling into the cavity formed by the paint supply pipe and the main shaft of the air motor and causing pollution.

[0024] The present invention is further configured as follows: 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 air-controlled pilot valve whose inlet end is connected to the second cleaning agent supply pipeline and the sewage discharge pipeline on the atomizer base, a connecting pipeline connecting the output end of the fourth 2-position 2-way air-controlled pilot valve and the inlet end of the first 2-position 2-way air-controlled pilot valve is provided on the atomizer base, and the first 2-position 2-way air-controlled pilot valve simultaneously controls whether the paint supply pipeline and the connecting pipeline are connected to the inner tube body of the paint delivery pipe; when the paint color needs to be switched, the following operation steps are performed: (S1) the first 2-position 2-way air-controlled pilot valve and the fourth 2-position 2-way air-controlled pilot valve are opened, and a stream of cleaning agent is transported to the inner tube body of the paint delivery pipe along the second cleaning agent supply pipeline and the connecting pipeline The paint supply pipe is cleaned by the cleaning agent. Another cleaning agent flows along the second cleaning agent supply pipe, the connecting pipe, and the paint supply pipe to the electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit (the pipe structure for conveying paint between them), thereby cleaning the pipe of the paint supply source. (S2) After the cleaning is completed, another color of paint is connected, the first 2-position 2-way air-controlled pilot valve is closed, and the fourth 2-position 2-way air-controlled pilot valve is opened. The paint mixed with the residual cleaning agent flows out along the paint supply pipe, the connecting pipe, and the drain pipe. The cleaning agent from the second cleaning agent supply pipe enters the drain pipe under the action of the conveying pressure. (S3) Finally, the first 2-position 2-way air-controlled pilot valve is opened, and the fourth 2-position 2-way air-controlled pilot valve is closed to spray the new paint color.

[0025] By adopting the above technical solution, when the paint color needs to be switched, the following operation steps are performed: (S1) the first 2-position 2-way air-controlled pilot valve and the fourth 2-position 2-way air-controlled pilot valve are opened, and a stream of cleaning agent is transported along the second cleaning agent supply pipeline and the connecting pipeline to the inner tube body of the paint delivery pipe, and flows out from the rotary cup assembly to clean the inner tube 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 electrostatic high-voltage generator assembly and the atomizing rotary air flow control unit (used for transporting paint). The pipeline structure is used to clean the pipeline of the paint supply source; (S2) after cleaning, another color of paint is connected, the first 2-position 2-way air-controlled pilot valve is closed, and the fourth 2-position 2-way air-controlled pilot valve is opened. The paint mixed with the residual cleaning agent flows out along the paint supply pipeline, the connecting pipeline, and the drain pipeline, and the cleaning agent from the second cleaning agent supply pipeline enters the drain pipeline under the action of the delivery pressure; (S3) finally, the first 2-position 2-way air-controlled pilot valve is opened, and the fourth 2-position 2-way air-controlled pilot valve is closed to spray the new paint color.

[0026] The present invention is further configured as follows: the electrostatic high-voltage generator assembly includes a mounting base and an electrostatic high-voltage generator arranged in the mounting base; the atomizer base is installed on the mounting base, and the mounting base is integrated with a plurality of first separated air channels respectively connected to the compressed air required at the atomizer base assembly, and the mounting base is integrated with a plurality of first separated liquid pipelines respectively connected to 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 and the conductive ring of the paint supply pipe; the mounting base is provided with a plug electrically connected to the electrostatic high-voltage generator and a second conductive rod electrically connected to the plug; when the atomizer base is installed on the mounting base, the second conductive rod is electrically connected to the socket to realize the charging function of the paint supply pipe.

[0027] 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 and the conductive ring of the paint supply pipe; a plug electrically connected to the electrostatic high-voltage generator and a second conductive rod electrically connected to the plug are provided on the mounting base; when the atomizer base is installed on the mounting base, the second conductive rod is electrically connected to the socket, thereby realizing the charging function of the paint supply pipe.

[0028] The present invention is further configured as follows: the atomizing rotating air flow control unit is used to be connected to the end flange of the robot and to be installed on the mounting base, the atomizing rotating air flow control unit is integrated with a plurality of second separated air channels respectively connected to the first separated air channels on the mounting base, and the atomizing rotating air flow control unit is integrated with a plurality of second separated liquid pipelines respectively connected to the first separated liquid pipelines on the mounting base; the atomizing rotating air flow control unit has three groups of step flow control valves and outlet gas flow sensors, the step flow control valve core controls the air output flow, and the outlet gas flow sensor is configured to accurately and finitely detect the real-time output gas flow size; two groups of step flow control valves and outlet gas flow sensors are respectively used to control the air pressure values ​​of the external shaping air and the internal shaping air; the remaining groups of step flow control valves and outlet gas flow sensors are used to control the air pressure value of the compressed air entering the rotating air channel.

[0029] By adopting the above technical solution, two sets of step flow control valves and outlet gas flow sensors are used to control the pressure of the external shaping air and the internal shaping air, respectively. This allows for real-time closed-loop feedback control of the pressure of the two shaping air streams, and vector superposition of the shaping air. When the pressure of the external shaping air is higher than that of the internal shaping air, the paint atomization spray width contracts inward; when the pressure of the external shaping air is lower than that of the internal shaping air, the paint atomization spray width expands inward. This allows for quantitative adjustment of the cyclonic angle and range of the shaping air, achieving the effect of precisely adjusting the spray width of the paint atomization particles. The remaining sets of step flow control valves and outlet gas flow sensors are used to control the pressure of the compressed air entering the rotary air duct, enabling real-time closed-loop feedback control of the spindle speed of the air motor (i.e., the speed of the rotary cup assembly). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention (the electrostatic high-voltage generator assembly is partially cut away);

[0031] Figure 2 This is an exploded view of the structure of the rotary cup assembly of the present invention;

[0032] Figure 3 This is a structural cross-sectional view of the rotary cup assembly and the paint delivery pipe in the present invention;

[0033] Figure 4 yes Figure 3 Schematic diagram of the structure of the lower half of the foundation;

[0034] Figure 5 It is a structural schematic diagram of the shaping air ring assembly in the present invention;

[0035] Figure 6 It is a structural cross-sectional view of the shaping air ring assembly of the present invention;

[0036] Figure 7 This is an exploded view of the structure of the atomizer base assembly of the present invention;

[0037] Figure 8 This is a cross-sectional view of the structure of the atomizer base assembly of the present invention (used to illustrate the paint supply pipeline path);

[0038] Figure 9 This is a structural cross-sectional view of the atomizer base assembly, the rotary cup assembly, and the shaping air ring assembly of the present invention (used to illustrate the first cleaning agent supply pipeline path);

[0039] Figure 10 This is a structural cross-sectional view of the atomizer base assembly, the rotary cup assembly, and the shaping air ring assembly of the present invention (used to illustrate the path of the purge and clean air duct);

[0040] Figure 11 This is a structural cross-sectional view of the atomizer base assembly and the shaping air ring assembly of the present invention (used to illustrate the path of the external shaping air duct);

[0041] Figure 12 This is a structural cross-sectional view of the atomizer base assembly and the shaping air ring assembly of the present invention (used to illustrate the path of the internal shaping air duct);

[0042] Figure 13 It is an exploded view of the structure of the air motor of the present invention;

[0043] Figure 14 is a cross-sectional view of the structure of the air motor of the present invention;

[0044] Figure 15 This is a cross-sectional view of the structure of the air motor of the present invention (used to illustrate the bearing air passage path);

[0045] Figure 16 This is a cross-sectional view of the structure of the atomizer base assembly of the present invention (used to illustrate the rotating air passage path);

[0046] Figure 17 is a cross-sectional view of the structure of the air motor of the present invention (used to illustrate the deceleration air path);

[0047] Figure 18 This is a cross-sectional view of the air motor of the present invention (used to illustrate the rotating air inlet and the deceleration air inlet);

[0048] Figure 19 It is a structural cross-sectional view of the atomizer base assembly of the present invention (used to illustrate the emergency stop air duct path);

[0049] Figure 20 This is a cross-sectional view of the air motor of the present invention (used to illustrate the emergency stop structure);

[0050] Figure 21 This is a cross-sectional view of the structure of the atomizer base assembly of the present invention (used to illustrate the exhaust air path);

[0051] Figure 22 1 is a bottom schematic diagram of a driving impeller of the main shaft of the air motor of the present invention;

[0052] Figure 23 This is a cross-sectional view of the structure of the rotary cup assembly, shaping air ring assembly, atomizer protective housing, atomizer base assembly, and electrostatic high-voltage generator assembly in the present invention (used to illustrate the electrical connection structure related to the electrostatic induction conductive structure of the coating);

[0053] Figure 24 This is a structural cross-sectional view of the atomizer base assembly, the rotary cup assembly, and the shaping air ring assembly of the present invention (used to illustrate the positive pressure purge air path);

[0054] Figure 25 This is a schematic diagram of the structure of the paint delivery pipe, paint supply pipeline, first cleaning agent supply pipeline, purge air duct, second cleaning agent supply pipeline, and sewage discharge pipeline in the present invention (the pipelines and air ducts are specifically shown after being peeled off from the atomizer base);

[0055] Figure 26 This is a cross-sectional view of the structure of the atomizer base of the present invention (used to illustrate the structure of the first 2-position 2-way air-controlled pilot valve and the fourth 2-position 2-way air-controlled pilot valve);

[0056] Figure 27 It is a structural schematic diagram of the atomizer base assembly in the present invention (used to illustrate the electrostatic induction conductive structure of the coating);

[0057] Figure 28 It is a structural cross-sectional view of the atomizing rotating air flow control unit of the present invention;

[0058] Figure 29 It is a structural explosion diagram of the atomizing rotating air flow control unit in the present invention.

[0059] Figure numerals: 1, bell assembly; 1-1, bell body; 1-1-1, diverter groove; 1-1-2, annular groove; 1-1-3, inclined hole; 1-2, cup outer cleaning overflow ring; 1-3, diverter; 1-3-1, mounting seat; 1-3-2, diverter plate; 1-3-2-1, conical protrusion; 1-3-2-2, leakage hole; 1-3-3, mounting sleeve; 1-3-4, annular diverter 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 shell; 4, atomizer base assembly; 4-1, atomizer base; 4-1-1, paint supply pipeline; 4-1-2, first cleaning agent supply pipeline; 4-1-3, first 2-position 2-way air-controlled pilot valve; 4-1-4, second 2-position 2-way air-controlled pilot valve; 4-1-5, purge and clean air duct; 4-1-6, third 2-position 2-way air-controlled pilot valve; 4-1-7, outer shaping air duct; 4-1 -8, internal 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 purge air duct; 4-1-13, second cleaning agent supply line; 4-1-14, sewage discharge line; 4-1-15, fourth 2-position 2-way air-controlled pilot valve; 4-1-16, connecting line; 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; 4-2-17, reduction air Air inlet; 4-2-1-8, brake mounting hole; 4-2-1-9, brake shaft; 4-2-1-10, compression spring; 4-2-1-11, exhaust hole; 4-2-1-12, deceleration air duct; 4-2-2, main shaft; 4-2-2-1, drive impeller; 4-2-2-2, groove hole; 4-2-3, air-floating plane bearing; 4-2-4, first static-pressure graphite air-floating bearing; 4-2-5, second static-pressure graphite air-floating bearing; 4-3, paint delivery pipe; 4-3-1, inner tube; 4-3-2, outer tube; 4-3-3, gun head sealing nut; 4-3-4, expansion overflow sleeve; 4-3-5, locking nut; 4-4, paint electrostatic induction conductive structure; 4-4-1, socket; 4-4-2, conductive ring;4-4-3, first conductive rod; 4-5, shaped 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 pulse sensor; 6, atomizing rotary air flow control unit; 6-1, step flow control valve; 6-2, outlet gas flow sensor. DETAILED DESCRIPTION

[0060] The present invention will be further described in detail below with reference to the accompanying drawings.

[0061] Example: An electrostatic rotary cup spray gun, such as Figure 1 As shown, it includes a bell 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 mounted on the atomizing rotary air flow control unit 6, the atomizer base assembly 4 is mounted on the electrostatic high-voltage generator assembly 5, the shaping air ring assembly 2 is mounted on the atomizer base assembly 4, the bell assembly 1 is located within the shaping air ring assembly 2 and mounted on the air motor 4-2, and the atomizer protective housing 3 is mounted 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 through the centrifugal force of rotation; the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 have a paint conveying function that realizes conveying the paint to the rotary cup assembly 1; the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 have a self-cleaning function that realizes cleaning the rotary cup assembly 1 and the structure that realizes the paint conveying function; 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 have a function of quantitatively adjusting the cyclone angle and range of the shaping air; the electrostatic high-voltage generator 5-2 and the atomizer base assembly 4 have a function of conveying electric charge to the structure that realizes the paint conveying function to realize the charged function of the paint.

[0062] like Figure 1 、 Figures 2 to 4As shown, the bell assembly 1 comprises a bell body 1-1, an external cleaning overflow ring 1-2 disposed outside the bell body 1-1, and a diverter 1-3 disposed within the bell body 1-1. The bell body 1-1 and the external cleaning overflow ring 1-2 are made of titanium alloy, while the diverter 1-3 is made of PEEK, which is highly corrosion-resistant and lightweight. The bell body 1-1 is threadedly connected to the spindle 4-2-2 of the air motor 4-2. Six hundred diverter grooves 1-1-1 are arranged in a circumferential array along the inner edge of the bell body 1-1's opening. The diverter grooves 1-1-1 have a semicircular cross-section with a radius of 0.075 mm. An annular groove 1-1-2 is provided in the middle of the bell body 1-1, an annular overflow channel 1-4 is formed between the cup outer cleaning overflow ring 1-2 and the bell body 1-1, and a plurality of inclined holes 1-1-3 are provided 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 diverter 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 diverter plate 1-3-2 installed on the mounting seat 1-3-1 and spaced apart from the mounting seat 1-3-1, and a diverter plate 1-3-2 installed on 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 face 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, which pass through its two end faces. 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.

[0063] 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 inner ring 2-3 of the air outlet component embedded and installed from the other end of the shaping ring mounting body 2-1, and an outer ring 2-4 of the air outlet component embedded and installed from the other end of the shaping ring mounting body 2-1 and matched with the inner ring 2-3 of the air outlet component. The overall material of the shaping air ring assembly 2 is SUS316 stainless steel.

[0064] like Figure 5 and Figure 6As shown, a plurality of first through holes 2-2-1 are provided 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 provided 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 provided 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 provided 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 provided 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 provided on the outer ring 2-4 of the air outlet component, and a plurality of third through holes 2-3-2 communicating with the third annular cavity 2-4-1 communicating with the plurality of third through holes 2-3-2 are provided in a circumferential array on the end face of the outer ring 2-4 of the air outlet component. The outer shaping air outlet hole 2-4-2 is connected to the cavity 2-4-1 and is arranged obliquely; the fourth cavity 2-1-3 is arranged on the circumferential side of the shaping ring mounting body 2-1, the inner ring 2-3 of the air outlet component is provided with a fifth annular cavity 2-3-3 connected to the fourth cavity 2-1-3, and a plurality of fourth through holes 2-3-4 connected to 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, and a sixth annular cavity 2-4-3 connected to the fourth through holes 2-3-4 is provided on the outer ring 2-4 of the air outlet component, and a plurality of inner shaping air outlet holes 2-4-4 connected to the sixth annular cavity 2-4-3 and arranged obliquely are arranged in a circumferential array on the end face of the outer ring 2-4 of the air outlet component. A circle of outer shaping air outlet holes 2-4-2 is located on the outer circle of a circle of inner shaping air outlet holes 2-4-4.

[0065] like Figure 5 and Figure 6 As shown, 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 constitute an external shaped airway structure, and the external shaped air outlet hole 2-4-2 is connected to the third annular cavity 2-4-1. The fourth cavity 2-1-3, the fifth annular cavity 2-3-3, and the fourth through hole 2-3-4 constitute an internal shaped airway structure, and the internal shaped air outlet hole 2-4-4 is connected to the sixth annular cavity 2-4-3. An airway structure is provided between the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotating air flow control unit 6, which supplies external shaped air to the multiple first through holes 2-2-1 and outputs internal shaped air to the fourth cavity 2-1-3.

[0066] like Figure 1 and Figure 7As shown, the atomizer base assembly 4 includes an atomizer base 4-1 for installation on the electrostatic high-voltage generator assembly 5, an air motor 4-2 arranged on the atomizer base 4-1, a paint supply pipe 4-3 arranged 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 shaped air sealing cover 4-5 arranged on the peripheral side of the atomizer base 4-1.

[0067] like Figure 1 、 Figure 3 、 Figure 4 and Figure 7 As shown, the paint delivery pipe 4-3 is used to transport paint or cleaning agent to the bell assembly 1. A pipeline structure for transporting paint or cleaning agent to the paint delivery pipe 4-3 is provided 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 explained in detail later. The other pipeline structures are similar). The paint delivery pipe 4-3 includes an inner tube body 4-3-1, an outer tube body 4-3-2 disposed around the inner tube body 4-3-1, a gun head sealing nut 4-3-3 disposed at the end of the outer tube body 4-3-2 near the bell assembly 1, an expansion overflow sleeve 4-3-4 made of rubber FFKM and disposed between the gun head sealing nut 4-3-3 and the inner tube body 4-3-1, and a locking nut 4-3-5 disposed at the end of the outer tube body 4-3-2 away from the bell assembly 1. Inner tube 4-3-1 is used to transport paint, and the interlayer channel formed between inner tube 4-3-1 and outer tube 4-3-2 is used to transport cleaning agent. When the cleaning agent pressure in the interlayer channel exceeds a set value (the cleaning agent delivery liquid pressure in this patent is 0.2 MPa), the cleaning agent expands from expansion overflow sleeve 4-3-4. Paint delivery pipe 4-3 is used to transport paint to bell assembly 1 for painting, and to output cleaning agent to bell assembly 1 for cleaning. One end of inner tube 4-3-1 of paint delivery pipe 4-3 passes through the center hole of mounting sleeve 1-3-3 and is embedded in the center hole of mounting base 1-3-1. A gap is set between the outer wall of inner tube 4-3-1 and the inner wall of the center hole of mounting base 1-3-1. The gun head sealing nut 4-3-3 is embedded in the center hole of mounting sleeve 1-3-3.

[0068] like Figure 1 、 Figures 8 to 12 、 Figure 25As shown, the atomizer base 4-1 is provided with a paint supply pipeline 4-1-1 connected to the inner tube body 4-3-1 of the paint supply pipe 4-3, the atomizer base 4-1 is provided with a first cleaning agent supply pipeline 4-1-2 connected to the interlayer channel between the outer tube body 4-3-2 and the inner tube body 4-3-1 of the paint supply pipe 4-3, the atomizer base 4-1 is provided with a first 2-position 2-way air-controlled pilot valve 4-1-3 for controlling the on-off of the paint supply pipeline 4-1-1, the atomizer base 4-1 is provided with a second 2-position 2-way air-controlled pilot valve 4-1-4 for controlling the on-off of the first cleaning agent supply pipeline 4-1-2, and a pipeline structure connecting the paint supply pipeline 4-1-1 and the first cleaning agent supply pipeline 4-1-2 is provided between the electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6. The atomizer base 4-1 is provided with a purge and purification air duct 4-1-5 which is a sandwich channel connecting the outer tube body 4-3-2 and the inner tube body 4-3-1 of the paint supply pipe 4-3. The atomizer base 4-1 is provided with a third 2-position 2-way air-controlled pilot valve 4-1-6 which controls the on and off of the purge and purification air duct 4-1-5. An air duct structure which is connected to the purge and purification air duct 4-1-5 is provided between the electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6 (this air duct structure is a general term, some structures will be explained in detail later, and the same applies to other air duct 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 sealing cover 4-5. The atomizer base 4-1 is formed with an external shaping air passage 4-1-7 communicating with the plurality of first through holes 2-2-1. The atomizer base 4-1 and the atomizer base 4-1 and the external shaping air sealing cover 4-5 are formed with a fourth cavity 2-1-3 (cooperating with the air passage 4-1-7). Figure 6 , Figure 12 The electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6 have an airway structure that connects the external shaping airway 4-1-7 and the internal shaping airway 4-1-8.

[0069] like Figure 7 、 Figure 13 and Figure 14As shown, the air motor 4-2 uses compressed air as a driving force, and the main shaft 4-2-2 of the air motor 4-2 is threadedly connected to the bell body 1-1 of the bell assembly 1. The air motor 4-2 includes a motor housing 4-2-1, a main shaft 4-2-2, 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. The motor housing 4-2-1 includes a motor housing bottom 4-2-1-1, a motor housing lower portion 4-2-1-2 disposed on the motor housing bottom 4-2-1-1, and a motor housing middle portion 4-2-1 disposed on the motor housing lower portion 4-2-1-2. -3, the upper part 4-2-1-4 of the motor housing is arranged on the middle part 4-2-1-3 of the motor housing; the air-floating plane 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 hydrostatic 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, and the second hydrostatic 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.

[0070] like Figure 1 、 Figures 13 to 21 As shown, the motor housing 4-2-1 is provided with a bearing air duct 4-2-1-5 for supplying air to the air-floating plane 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. The tail end of the main shaft 4-2-2 is provided with a driving impeller 4-2-2-1 (whose blades are C-shaped and arranged in a circumferential array) that is driven by gas to rotate. The lower portion of the motor housing 4-2-1-2 is provided with multiple rotating air inlets 4-2-1-6 (cooperating with the rotating impeller 4-2-2-1) connected to the driving impeller 4-2-2-1. Figure 13 and Figure 18 , Figure 16 (The illustration is not clear due to the sectional view angle) The atomizer base 4-1 is provided with a rotating air duct 4-1-9 that communicates with multiple rotating air inlets 4-2-1-6 after the air motor 4-2 is installed. A deceleration air duct 4-2-1-12 that communicates with the driving impeller 4-2-2-1 is provided between the bottom 4-2-1-1 of the motor housing and the lower part 4-2-1-2 of the motor housing. The atomizer base 4-1 is provided with an air duct structure that communicates with the deceleration air duct 4-2-1-12 after the air motor 4-2 is installed. The main shaft 4-2-2 is provided with a circumferential array of groove holes 4-2-2-2 (which can be seen from the side of the motor housing middle part 4-2-1-3). Figure 13 、 Figure 20(See diagram for reference). The motor housing's central portion 4-2-1-3 is provided with multiple brake mounting holes 4-2-1-8. A brake shaft 4-2-1-9 is telescopically mounted within the brake mounting hole 4-2-1-8 for engaging in a recessed hole 4-2-2-2 to achieve an emergency stop. A compression spring 4-2-1-10 is disposed within the brake mounting hole 4-2-1-8 to urge the brake shaft 4-2-1-9 away from the recessed hole 4-2-2-2. An emergency stop air duct 4-1-10 is disposed on the atomizer base 4-1, communicating with the brake mounting hole 4-2-1-8 after the air motor 4-2 is installed. Multiple exhaust holes 4-2-1-11 are disposed around the lower portion 4-2-1-2 of the motor housing. An exhaust air duct 4-1-11 is disposed on the atomizer base 4-1, communicating with the exhaust holes 4-2-1-11 after the air motor 4-2 is installed. An air passage structure for delivering the required compressed air to the air motor 4 - 2 is provided between the electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6 .

[0071] like Figure 22 and Figure 23 As shown, an optical fiber speed 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 four equally spaced circular ring portions of black and metallic color. The optical fiber speed pulse sensor 5-3 calculates the actual rotational speed of the motor by irradiating the optical fiber with pulses absorbed by the black color and reflected by the metallic color. The optical fiber speed pulse sensor 5-3 is installed on the electrostatic high-voltage generator assembly 5. An installation channel is provided between the electrostatic high-voltage generator assembly 5 and the atomizer base 4-1 for the optical fiber of the optical fiber speed pulse sensor 5-3 to extend to the driving impeller 4-2-2-1.

[0072] like Figure 1 、 Figure 24 As 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, and a positive-pressure purge air channel 4-1-12 is provided on the atomizer base 4-1, which is connected to the positive-pressure purge air channel after the air motor 4-2 is installed. An air channel structure connecting the positive-pressure purge air channel 4-1-12 is provided between the electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6.

[0073] like Figure 1 、 Figure 8 、 Figure 25 and Figure 26 As shown, the atomizer base 4-1 is provided with a second cleaning agent supply pipeline 4-1-13 and a sewage discharge pipeline 4-1-14 ( Figure 25(The 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 pipeline 4-1-14 are connected in parallel. The inlet end of the atomizer base 4-1 is connected to the second cleaning agent supply pipeline 4-1-13 and the sewage pipeline 4-1-14. The fourth 2-position 2-way air-controlled pilot valve 4-1-15 is connected to the second cleaning agent supply pipeline 4-1-13 and the sewage pipeline 4-1-14. The atomizer base 4-1 is provided with a connecting pipeline 4-1-16 connecting the output end of the fourth 2-position 2-way air-controlled pilot valve 4-1-15 and the inlet end of the first 2-position 2-way air-controlled pilot valve 4-1-3. The first 2-position 2-way air-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 tube body 4-3-1 of the paint delivery pipe 4-3. When the paint color needs to be switched, the following steps are performed: S1 opens the first 2-position 2-way air-controlled pilot valve 4-1-3 and the fourth 2-position 2-way air-controlled pilot valve 4-1-15, and 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 tube body 4-3-1 of the paint delivery pipe 4-3, and flows out from the rotary cup assembly 1 to clean the inner tube 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 electrostatic high-voltage generator 5-2 assembly 5 and the atomizing rotating air flow control unit 6 for transporting paint. The pipeline structure of the material is used to clean the pipeline of the paint supply source; after S2 cleaning is completed, another color of paint is connected, the first 2-position 2-way air-controlled pilot valve 4-1-3 is closed, and the fourth 2-position 2-way air-controlled pilot valve 4-1-15 is opened. 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 pipeline 4-1-14, and the cleaning agent from the second cleaning agent supply pipeline 4-1-13 enters the sewage pipeline 4-1-14 under the action of the delivery pressure; S3 finally opens the first 2-position 2-way air-controlled pilot valve 4-1-3, closes the fourth 2-position 2-way air-controlled pilot valve 4-1-15, and sprays the new paint color.

[0074] like Figure 1 、 Figure 23 and Figure 27 As shown, the electrostatic high-voltage generator assembly 5 includes a mounting base 5-1 and an electrostatic high-voltage generator 5-2 disposed within 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 separated air passages for respectively connecting to the atomizer base assembly 4 for the required compressed air. The mounting base 5-1 is also integrated with a plurality of first separated liquid pipelines for respectively connecting to the atomizer base assembly 4 for the required liquid. The electrostatic induction conductive structure 4-4 (cooperating with the electrostatic induction conductive structure 4-4) of the coating is Figure 7) is used to transfer the charge of the electrostatic high-voltage generator assembly 5 to the paint delivery pipe 4-3, so as to realize the charging function of the paint delivery pipe 4-3; the paint electrostatic induction conductive structure 4-4 includes a socket 4-4-1 arranged 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 locking nut 4-3-5 and the conductive ring 4-4-2 of the paint delivery pipe 4-3; 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 installed on the mounting base 5-1, the second conductive rod 5-1-2 is electrically connected to the socket 4-4-1, so as to realize the charging function of the paint delivery pipe 4-3.

[0075] like Figure 1 、 Figure 7 、 Figure 28 and Figure 29 As shown, the atomizing rotating air flow control unit 6 is used to connect to the robot's end flange and is mounted on the mounting base 5-1. The atomizing rotating air flow control unit 6 is integrated with multiple second separated air channels, each connected to the first separated air channel on the mounting base 5-1. The atomizing rotating air flow control unit 6 is integrated with multiple second separated liquid pipelines, each connected to the first separated liquid pipeline on the mounting base 5-1. The atomizing rotating air flow control unit 6 contains three sets of step flow control valves 6-1 and outlet gas flow sensors 6-2. The valve cores of the step flow control valves 6-1 control the air output flow rate, and the outlet gas flow sensors 6-2 are configured to accurately and finitely detect the real-time output gas flow rate. Two sets of step flow control valves 6-1 and outlet gas flow sensors 6-2 are used to control the pressure of the external shaping air and the internal shaping air, respectively. The remaining set of step flow control valves 6-1 and outlet gas flow sensors 6-2 is used to control the pressure of the compressed air entering the rotating air channel 4-1-9.

[0076] 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 air motor 4-2 drives the rotary cup assembly 1 to rotate at a high speed. The rotary cup assembly 1 atomizes the paint through the centrifugal force of rotation. At the same time, the electrostatic high-voltage generator 5-2 and the atomizer base assembly 4 have a structure that can transport charge to the paint transport function to realize the paint charging function, so that the atomized paint particles are charged with static electricity. Due to the electrostatic induction effect, the paint particles are charged with high-voltage negative charge as a whole, and like charges repel each other, thereby dispersing into particles with smaller diameters. The paint particles are then sprayed to ensure the spraying effect and coating quality. At the same time, the atomizer base assembly 4, the electrostatic high-voltage generator assembly 5, and the atomizing rotary air flow control unit 6 have a self-cleaning function that cleans the rotary cup assembly 1 and the structure that realizes the paint delivery function, ensuring that the color change paint switching and process cleaning are free of impurities. In addition, 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 have the function of quantitatively adjusting the cyclonic angle and range of the shaping air, so as to achieve the effect of accurately adjusting the spray width of the paint atomized particles. Ultimately, the inner and outer surfaces of the rotary cup and the paint delivery pipe 4-3 are cleaned, the paint supply is accurately turned on and off, the color change paint switching and process cleaning are free of impurities, and the closed-loop control of the rotary cup speed and the atomizing shaping air intake volume can be precisely controlled.

[0077] (2) During the paint atomization spraying process, the paint flows along the inner tube 4-3-1 of the paint supply pipe 4-3, the gap between the mounting seat 1-3-1 and the diverter plate 1-3-2, and the annular diverter channel 1-3-4 between the diverter plate 1-3-2 and the inner wall of the rotary cup body 1-1. During this process, the setting of the conical protrusion 1-3-2-1 on the diverter plate 1-3-2 makes the diversion performance less affected by the inclination angle of the spraying posture, and can effectively and evenly divert the flow, and the performance improves with the increase of flow rate; and during the rotation of the rotary cup body 1-1, through its centrifugal force and the setting of the diverter groove 1-1-1, the paint is atomized to form high-quality fineness and uniform paint particles. At the same time, due to the electrostatic induction effect, the paint as a whole carries a high-voltage negative charge, and like charges repel each other, and then dispersed into paint particles with smaller particle diameters, thereby ensuring the spraying effect and coating quality. During the cleaning process of the rotary cup assembly 1, the cleaning agent flows along the interlayer channel between the inner tube body 4-3-1 and the outer tube body 4-3-2 of the paint supply pipe 4-3. When the set cleaning agent pressure is reached, the expansion overflow sleeve 4-3-4 opens, and the cleaning agent swells 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 1-1-2 between the cleaning overflow ring 1-2 outside the cup and the rotary cup body 1-1. 4, and then flows to the outside of the bell body 1-1 to realize the cleaning function of the outside of the bell body 1-1; (2) through the gap between the inner tube 4-3-1 of the paint supply pipe 4-3 and the central hole of the mounting seat 1-3-1, along the flow path of the paint spraying, it flows to the inside of the bell body 1-1 to realize the cleaning function of the inside of the bell body 1-1; (3) through the leakage hole 1-3-2-2 of the diverter plate 1-3-2 to the surface of the diverter plate 1-3-2 away from the mounting seat 1-3-1 to realize cleaning; finally, the all-round cleaning function of the bell assembly 1 is realized.

[0078] (III) 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 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 2-4 -4 discharge; at this time, the pressure values ​​of the external shaping air and the internal shaping air are adjusted through the atomizing rotating air flow control unit 6, and the shaping air is vector-vector superimposed. When the external shaping air pressure is higher than the internal shaping air pressure, the paint atomization spray width shrinks inward; when the external shaping air pressure is lower than the internal shaping air pressure, the paint atomization spray width expands outward; thereby, the cyclone angle and range of the shaping air can be quantitatively adjusted to achieve the effect of accurately adjusting the spray width size of the paint atomization particles.

[0079] (IV) In the atomizer base assembly 4, the paint supply pipeline 4-1-1 and the first cleaning agent supply pipeline 4-1-2 on the atomizer base 4-1 are connected with 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, so as to realize the transportation of paint and cleaning agent, and after the rotary cup assembly 1 is cleaned, the third 2-position 2-way air-controlled pilot valve 4-1-6 is opened to blow away the clean air and flow along the cleaning path of the cleaning agent, and finally realize the function of blowing and drying the inner and outer surfaces of the rotary cup assembly 1 after cleaning with the cleaning agent; similarly, an outer through hole 2-2-1 communicating with the plurality of first through holes 2-2-1 is formed in the atomizer base 4-1. The shaping air duct 4-1-7, an inner shaping air duct 4-1-8 communicating with the fourth cavity 2-1-3 is formed inside the atomizer base 4-1, between the atomizer base 4-1 and the outer shaping air enclosure 4-5, and the electrostatic high-voltage generator assembly 5 and the atomizing rotating air flow control unit 6 have an air duct structure connecting the outer shaping air duct 4-1-7 and the inner shaping air duct 4-1-8 to realize the transportation of the outer shaping air and the inner shaping air; at the same time, because most of the 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, so as to realize the charging function of the paint delivery pipe 4-3.

[0080] (V) The setting of the air motor 4-2 has the following functions: (1) High-speed rotation function: The main shaft 4-2-2 of the air motor 4-2 is connected through the air-floating plane 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, so that the main shaft 4-2-2 is in a suspended state, providing zero friction conditions 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 duct 4-1-9 and multiple rotating air inlets 4-2-1-6 to drive the impeller 4-2-2-1 and the main shaft 4-2-2 to achieve high-speed rotation; (3) Main shaft 4-2-2 braking function: Compressed air enters along the air duct structure of the atomizer base 4-1 and the deceleration air duct 4-2-1-12, and reacts on the impeller to reduce the speed of the main shaft 4-2-2. Speed; (4) Emergency stop function of main shaft 4-2-2: compressed air enters the brake mounting hole 4-2-1-8 along the emergency stop air flow, overcomes the elastic force of the compression spring 4-2-1-10, and makes the brake shaft 4-2-1-9 move toward the groove hole 4-2-2-2 of the main shaft 4-2-2. The emergency stop locking function is realized by the collision between the brake 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 brake shaft 4-2-1-9 to reset; (5) Compressed air discharge function: various compressed air entering the air motor 4-2 is discharged along the exhaust hole 4-2-1-11 and the exhaust air duct 4-1-11 after doing work. No air heater is required, so as to avoid condensation in the various air duct structures at the atomizer base 4-1 and the various air duct structures of the air motor 4-2.

[0081] (6) The bottom of the driving impeller 4-2-2-1 of the air motor 4-2 is a circle with four equal parts of black and metallic color spaced apart from each other. The optical fiber speed pulse sensor 5-3 calculates the actual speed of the motor by irradiating the optical fiber with pulses absorbed by the black part and reflected by the metallic color.

[0082] (VII) When the electrostatic rotary cup spray gun is working at a certain elevation during the paint spraying process, when the paint is pumped from the paint supply pipe 4-3 into the rotary cup assembly 1, due to the gap between the stationary paint supply pipe 4-3 and the rotating rotary assembly, part of the paint will enter the cavity between the main shaft 4-2-2 of the air motor 4-2 and the paint supply pipe 4-3, causing accumulated pollution. Therefore, during the spraying process, positive pressure blowing is performed along the positive pressure blowing air duct 4-1-12 and the positive pressure blowing air channel through compressed air to prevent part of the paint particles from falling into the cavity formed by the paint supply pipe 4-3 and the main shaft 4-2-2 of the air motor 4-2, causing pollution.

[0083] (VIII) When the paint color needs to be switched, the following steps are performed: S1 opens the first 2-position 2-way air-controlled pilot valve 4-1-3 and the fourth 2-position 2-way air-controlled pilot valve 4-1-15, and a stream of cleaning agent is delivered to the inner tube body 4-3-1 of the paint delivery pipe 4-3 along the second cleaning agent supply pipeline 4-1-13 and the connecting pipeline 4-1-16, and flows out from the rotary cup assembly 1 to clean the inner tube 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 for delivering paint between the electrostatic high-voltage generator 5-2 assembly 5 and the atomizing rotary air flow control unit 6. Structure, to clean the pipeline of the paint supply source; after S2 cleaning is completed, connect the paint of another color, close the first 2-position 2-way air-controlled pilot valve 4-1-3, open the fourth 2-position 2-way air-controlled pilot valve 4-1-15, and 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 pipeline 4-1-14, and the cleaning agent from the second cleaning agent supply pipeline 4-1-13 enters the sewage pipeline 4-1-14 under the action of the delivery pressure; S3 finally opens the first 2-position 2-way air-controlled pilot valve 4-1-3, closes the fourth 2-position 2-way air-controlled pilot valve 4-1-15, and sprays the new paint color to ensure the quality of color change spraying.

[0084] (9) The paint electrostatic induction conductive structure 4-4 includes a socket 4-4-1 arranged 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 locking 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 installed on the mounting base 5-1, the second conductive rod 5-1-2 is electrically connected to the socket 4-4-1, thereby realizing the charging function of the paint delivery pipe 4-3.

[0085] (10) Two sets of step flow control valves 6-1 and outlet gas flow sensors 6-2 are used to control the pressures of the external shaping air and the internal shaping air, respectively, thereby enabling real-time closed-loop feedback control of the pressures of the two shaping air streams. The shaping air is vector-superimposed. When the pressure of the external shaping air is higher than that of the internal shaping air, the paint atomization spray width contracts inward; when the pressure of the external shaping air is lower than that of the internal shaping air, the paint atomization spray width expands inward. This allows for quantitative adjustment of the cyclonic angle and range of the shaping air, achieving precise adjustment of the spray width of the paint atomization particles. The remaining sets of step flow control valves 6-1 and outlet gas flow sensors 6-2 are used to control the pressure of the compressed air entering the rotary air passage 4-1-9, enabling real-time closed-loop feedback control of the speed of the main shaft 4-2-2 of the air motor 4-2 (i.e., the speed of the rotary cup assembly 1).

[0086] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An electrostatic rotary cup spray gun, characterized by: The invention comprises a rotary cup assembly (1), a shaping air ring assembly (2), an atomizer protective shell (3), an atomizer base assembly (4) having an air motor (4-2), an electrostatic high-voltage generator assembly (5), and an atomizing rotating air flow control unit (6), wherein the electrostatic high-voltage generator assembly (5) is mounted on the atomizing rotating air flow control unit (6), the atomizer base assembly (4) is mounted on the electrostatic high-voltage generator assembly (5), the shaping air ring assembly (2) is mounted on the atomizer base assembly (4), the rotary cup assembly (1) is located in the shaping air ring assembly (2) and is mounted on the air motor (4-2), and the atomizer protective shell (3) is mounted on the atomizer base assembly (4) for protecting the atomizer base assembly (4) and the shaping air ring assembly (2); The rotary cup assembly (1) atomizes the coating through the centrifugal force of rotation; The atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6) have a paint delivery function for delivering the paint to the rotary cup assembly (1); The atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6) have a self-cleaning function for cleaning the rotary cup assembly (1) and the structure for achieving the paint conveying function; The shaping air ring assembly (2), the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotating air flow control unit (6) have the function of quantitatively adjusting the cyclone angle and range of the shaping air; The electrostatic high-voltage generator (5-2) and the atomizer base assembly (4) have a structure for transferring electric charge to a structure for transferring paint to realize a function of charging the paint; The atomizer base assembly (4) includes an atomizer base (4-1) for mounting on an electrostatic high-voltage generator assembly (5), an air motor (4-2) disposed on the atomizer base (4-1), a paint delivery pipe (4-3) disposed on the atomizer base (4-1) and passing through a main shaft (4-2-2) of the air motor (4-2), a paint electrostatic induction conductive structure (4-4), and a shaped air sealing cover (4-5) disposed on the circumference of the atomizer base (4-1); A positive-pressure purge air passage 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 passage (4-1-12) is provided on the atomizer base (4-1) and is connected to the positive-pressure purge air passage after the air motor (4-2) is installed; an air passage structure connected to the positive-pressure purge air passage (4-1-12) is provided between the electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6); positive-pressure purge is performed along the positive-pressure purge air passage (4-1-12) by compressed air, thereby preventing some paint particles from falling into a cavity formed by the paint delivery pipe (4-3) and the main shaft (4-2-2) of the air motor (4-2) and causing contamination.

2. The electrostatic rotary cup spray gun according to claim 1, characterized in that: The rotary cup assembly (1) comprises a rotary 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) arranged on the outside of the rotary cup body (1-1), and a diverter (1-3) arranged in the rotary cup body (1-1); the atomizer base assembly (4) is provided with a paint delivery pipe (4-3) passing through the main shaft (4-2-2) of the air motor (4-2); the paint delivery pipe (4-3) is used to deliver paint or cleaning agent to the rotary cup assembly (1); a pipeline structure for delivering paint or cleaning agent to the paint delivery pipe (4-3) is provided between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotary air flow control unit (6); and a plurality of diverter grooves (1-1-1) are arranged in a circumferential array at the inner edge of the opening of the rotary cup body (1-1).

3. The electrostatic rotary cup spray gun according to claim 2, characterized in that: An annular groove (1-1-2) is provided in the middle of the bell body (1-1), an annular overflow channel (1-4) is formed between the cup outer cleaning overflow ring (1-2) and the bell body (1-1), and a plurality of inclined holes (1-1-3) are provided 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 of which is connected to the annular overflow channel (1-4); the flow divider (1-3) comprises a mounting seat (1-3-1) mounted 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) mounted on the mounting seat (1-3-1) and spaced apart from the mounting seat (1-3-1), and a mounting plate (1-3-3). A mounting sleeve (1-3-3) is installed in the bell body (1-1) and located on the other side of the annular groove (1-1-2); a conical protrusion (1-3-2-1) is provided on the middle portion 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 circumference 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 circumference of the conical protrusion (1-3-2-1) and penetrating both end surfaces of the diverter plate (1-3-2); and a surface of the diverter plate (1-3-2) away from the mounting seat (1-3-1) is in an inner conical shape.

4. The electrostatic rotary cup spray gun according to claim 3, characterized in that: The paint delivery pipe (4-3) comprises an inner tube body (4-3-1), an outer tube body (4-3-2) arranged on the circumference of the inner tube body (4-3-1), a gun head sealing nut (4-3-3) arranged at one end of the outer tube body (4-3-2) close to the bell assembly (1), an expansion overflow sleeve (4-3-4) arranged between the gun head sealing nut (4-3-3) and the inner tube body (4-3-1), and a locking nut (4-3-5) arranged at one end of the outer tube body (4-3-2) away from the bell assembly (1). The inner tube body (4-3-1) is used for delivering paint, and the interlayer channel formed between the inner tube body (4-3-1) and the outer tube body (4-3-2) is used for delivering cleaning agent. When the interlayer channel is closed, the paint delivery pipe (4-3-1) is used for delivering paint, and the interlayer channel formed between the inner tube body (4-3-1) and the outer tube body (4-3-2) is used for delivering cleaning agent. When the cleaning agent pressure in the channel is greater than a set value, the cleaning agent expands from the expansion overflow sleeve (4-3-4); the paint delivery pipe (4-3) is used to deliver the paint to the rotary cup assembly (1) for painting, and the paint delivery pipe (4-3) is used to output the cleaning agent to the rotary cup assembly (1) for cleaning; one end of the inner tube body (4-3-1) of the paint delivery pipe (4-3) passes through the center hole of the mounting sleeve (1-3-3) and is embedded in the center hole of the mounting seat (1-3-1), a gap is set between the outer wall of the inner tube body (4-3-1) and the inner wall of the center hole of the mounting seat (1-3-1), and the gun head sealing nut (4-3-3) is embedded in the center hole of the mounting sleeve (1-3-3).

5. The electrostatic rotary cup spray gun according to claim 1, characterized in that: The shaping air ring assembly (2) comprises a shaping ring installation body (2-1), an annular fixing plate (2-2) embedded and installed from one end of the shaping ring installation 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 installation body (2-1), and an air outlet component outer ring (2-4) embedded and installed from the other end of the shaping ring installation body (2-1) and matched with the air outlet component inner ring (2-3); A plurality of externally shaped air outlet holes (2-4-2) are arranged in a circumferential array on the end surface of the outer ring (2-4) of the air outlet component; an externally shaped airway structure communicating with the externally shaped air outlet holes (2-4-2) is formed between the annular fixing plate (2-2), the shaping ring mounting body (2-1), the inner ring (2-3) of the air outlet component, and the outer ring (2-4) of the air outlet component; A plurality of inner shaping air outlet holes (2-4-4) are arranged in a circumferential array on the end surface of the inner ring (2-3) of the air outlet component, and an inner shaping airway structure communicating with the inner shaping air outlet holes (2-4-4) is formed between the shaping ring mounting body (2-1), the inner ring (2-3) of the air outlet component, and the outer ring (2-4) of the air outlet component; A circle of the outer shaping air outlet holes (2-4-2) is located on the outer circle of the inner shaping air outlet holes (2-4-4), and the circle of the outer shaping air outlet holes (2-4-2) and the circle of the inner shaping air outlet holes (2-4-4) are used to surround the circumference of the rotary 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 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 circumference of the inner ring (2-3) of the air outlet component; A third annular cavity (2-4-1) communicating with a plurality of third through holes (2-3-2) is provided on the outer ring (2-4) of the component; 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) constitute an external shaping airway structure; the external shaping air outlet hole (2-4-2) is communicated with the third annular cavity (2-4-1); an airway structure for conveying external shaping air to the plurality of first through holes (2-2-1) is provided between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotating air flow control unit (6).

7. The electrostatic rotary cup spray gun according to claim 5, characterized in that: 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 provided in a circumferential array on the end surface of the inner ring (2-3) of the air outlet component; a sixth through hole (2-3-4) communicating with the fourth through hole (2-3-4) is provided on the outer ring (2-4) of the air outlet component. annular cavity (2-4-3); the fourth cavity (2-1-3), the fifth annular cavity (2-3-3), and the fourth through hole (2-3-4) constitute an inner shaping airway structure; the inner shaping air outlet hole (2-4-4) is communicated with the sixth annular cavity (2-4-3); an airway structure for outputting the inner shaping air to the fourth cavity (2-1-3) is provided between the atomizer base assembly (4), the electrostatic high-voltage generator assembly (5), and the atomizing rotating air flow control unit (6).

8. The electrostatic rotary cup spray gun according to claim 5, characterized in that: The atomizer base (4-1) is provided with a paint supply pipeline (4-1-1) connected to the inner tube body (4-3-1) of the paint supply pipe (4-3); the atomizer base (4-1) is provided with a first cleaning agent supply pipeline (4-1-2) connected to the interlayer channel between the outer tube body (4-3-2) and the inner tube body (4-3-1) of the paint supply pipe (4-3); the atomizer base (4-1) is provided with a first 2-position 2-way air-controlled pilot valve (4-1-3) for controlling the on / off of the paint supply pipeline (4-1-1); the atomizer base (4-1) is provided with a second 2-position 2-way air-controlled pilot valve (4-1-4) for controlling the on / off of the first cleaning agent supply pipeline (4-1-2); and a pipeline structure connecting the paint supply pipeline (4-1-1) and the first cleaning agent supply pipeline (4-1-2) is provided between the electrostatic high-voltage generator assembly (5) and the atomizing rotating air flow control unit (6); The atomizer base (4-1) is provided with a purge and clean air duct (4-1-5) for connecting the interlayer channel between the outer tube body (4-3-2) and the inner tube body (4-3-1) of the paint delivery pipe (4-3); the atomizer base (4-1) is provided with a three-position two-way air-controlled pilot valve (4-1-6) for controlling the on-off of the purge and clean air duct (4-1-5); and an air duct structure for connecting the purge and clean air duct (4-1-5) is provided between the electrostatic high-voltage generator assembly (5) and the atomizing rotating 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 sealing cover (4-5); an external shaping air duct (4-1-7) communicating with the plurality of first through holes (2-2-1) is formed in the atomizer base (4-1); an internal shaping air duct (4-1-8) communicating with the fourth cavity (2-1-3) is formed in the atomizer base (4-1) and between the atomizer base (4-1) and the external shaping air sealing cover (4-5); an air duct structure communicating with the external shaping air duct (4-1-7) and the internal shaping air duct (4-1-8) is provided between the electrostatic high-voltage generator assembly (5) and the atomizing rotating air flow control unit (6); The air motor (4-2) uses compressed air as a driving force, and the main shaft (4-2-2) of the air motor (4-2) is threadedly connected to the bell body (1-1) of the bell assembly (1); 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), thereby realizing the charge function of the paint delivery pipe (4-3).

9. The electrostatic rotary cup spray gun according to claim 8, characterized in that: The air motor (4-2) comprises a motor housing (4-2-1), a main shaft (4-2-2), an air-floating plane 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 speed of the main shaft (4-2-2); the motor housing (4-2-1) comprises a motor housing bottom (4-2-1-1), a motor housing lower portion (4-2-1-2) arranged on the motor housing bottom (4-2-1-1), a motor housing middle portion (4-2-1-2) arranged on the motor housing lower portion (4-2-1-2), and a motor housing middle portion (4-2-1-3) arranged on the motor housing lower portion (4-2-1-4). 2-1-3), an upper portion of a motor housing (4-2-1-4) arranged on a middle portion of the motor housing (4-2-1-3); the air-floating plane bearing (4-2-3) is arranged on an air-floating plane bearing (4-2-3) between the main shaft (4-2-2) and the bottom portion of the motor housing (4-2-1-1), the first static-pressure graphite air-floating bearing (4-2-4) is arranged between the lower portion 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 portion of the motor housing (4-2-1-4) and the main shaft (4-2-2); A bearing air passage (4-2-1-5) for supplying air to 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) is provided in the motor housing (4-2-1); a driving impeller (4-2-2-1) driven to rotate by gas is provided at the tail end of the main shaft (4-2-2); and a plurality of rotating air inlets (4-2-1-6) connected to the driving impeller (4-2-2-1) are provided at the lower portion (4-2-1-2) of the motor housing; A deceleration air duct (4-2-1-12) connected to the driving impeller (4-2-2-1) is provided between the bottom (4-2-1-1) of the motor housing and the lower part (4-2-1-2) of the motor housing; The main shaft (4-2-2) is provided with groove holes (4-2-2-2) in a circumferential array corresponding to the middle part (4-2-1-3) of the motor housing, and the middle part (4-2-1-3) of the motor housing is provided with a brake structure for embedding in the groove holes (4-2-2-2) to achieve emergency stop and locking; A plurality of exhaust holes (4-2-1-11) are provided on the peripheral side of the lower portion (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 portion (4-2-1-3) of the motor housing, and the brake structure comprises a plurality of brake shafts (4-2-1-9) which are respectively telescopically arranged in the brake air input mounting holes and are used to be embedded in the groove holes (4-2-2-2) to realize emergency stop and locking, and a plurality of compression springs (4-2-1-10) which are arranged in the brake air input mounting holes and drive the brake shafts (4-2-1-9) to move in a direction away from the groove holes (4-2-2-2).

11. The electrostatic rotary cup spray gun according to claim 9, characterized in that: The bottom of the driving impeller (4-2-2-1) has four equally spaced black and metallic annular portions. The speed measurement structure is an optical fiber speed measurement pulse sensor (5-3). The optical fiber speed measurement pulse sensor (5-3) calculates the actual speed of the motor by irradiating the optical fiber with pulses absorbed by the black portion and reflected by the metallic portion.

12. The electrostatic rotary cup spray gun according to claim 8, characterized in that: An optical fiber speed 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 portion with four equal parts of black and metallic colors spaced apart from each other. The optical fiber speed pulse sensor (5-3) calculates the actual rotational speed of the motor by irradiating the optical fiber with pulses absorbed by the black and reflected by the metallic colors. The optical fiber speed pulse sensor (5-3) is installed on the electrostatic high-voltage generator assembly (5). An installation channel is provided between the electrostatic high-voltage generator assembly (5) and the atomizer base (4-1) for the optical fiber of the optical fiber speed pulse sensor (5-3) to extend to the driving impeller (4-2-2-1).

13. The 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 air-controlled pilot valve (4-1-15) is connected at the inlet end of the atomizer base (4-1) to the second cleaning agent supply pipeline (4-1-13) and the sewage discharge pipeline (4-1-14). The atomizer base (4-1) is provided with a connecting pipeline (4-1-16) connecting the output end of the fourth 2-position 2-way air-controlled pilot valve (4-1-15) and the inlet end of the first 2-position 2-way air-controlled pilot valve (4-1-3), and the first 2-position 2-way air-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 tube body (4-3-1) of the paint delivery pipe (4-3); When the paint color needs to be switched, the following steps are performed: (S1) the first 2-position 2-way air-controlled pilot valve (4-1-3) and the fourth 2-position 2-way air-controlled pilot valve (4-1-15) are opened, and 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 tube body (4-3-1) of the paint delivery pipe (4-3) and flows out from the rotary cup assembly (1) to clean the inner tube 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 electrostatic high-voltage generator assembly (5) and the atomizing rotary air flow control unit (6) (used in between). The pipeline structure for conveying paint is used to clean the pipeline of the paint supply source; (S2) after cleaning is completed, another color of paint is connected, the first 2-position 2-way air-controlled pilot valve (4-1-3) is closed, and the fourth 2-position 2-way air-controlled pilot valve (4-1-15) is opened, and 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 pipeline (4-1-14), and the cleaning agent from the second cleaning agent supply pipeline (4-1-13) enters the sewage pipeline (4-1-14) under the action of the conveying pressure; (S3) finally, the first 2-position 2-way air-controlled pilot valve (4-1-3) is opened, and the fourth 2-position 2-way air-controlled pilot valve (4-1-15) is closed to spray the new paint color.

14. The electrostatic rotary cup spray gun according to claim 8, characterized in that: The electrostatic high-voltage generator assembly (5) comprises a mounting base (5-1) and an electrostatic high-voltage generator (5-2) arranged 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 separated air passages respectively connected to the atomizer base assembly (4) for receiving the required compressed air; and the mounting base (5-1) is integrated with a plurality of first separated liquid pipelines respectively connected to the atomizer base assembly (4) for receiving the required liquid.

15. The electrostatic rotary cup spray gun according to claim 14, characterized in that: The paint electrostatic induction conductive structure (4-4) comprises a socket (4-4-1) arranged on an 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 a locking nut (4-3-5) of a paint delivery pipe (4-3) and the conductive ring (4-4-2); a plug (5-1-1) electrically connected to an electrostatic high-voltage generator (5-2) and a second conductive rod (5-1-2) electrically connected to the plug (5-1-1) are arranged 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), thereby realizing the charging function of the paint delivery pipe (4-3).

16. The electrostatic rotary cup spray gun according to claim 14, characterized in that: The atomizing rotating air flow control unit (6) is used to be connected to the end flange of the robot and to be installed on the mounting base (5-1); the atomizing rotating air flow control unit (6) is integrated with a plurality of second separated air channels respectively connected to the first separated air channels on the mounting base (5-1); the atomizing rotating air flow control unit (6) is integrated with a plurality of second separated liquid pipelines respectively connected to the first separated liquid pipelines on the mounting base (5-1); The atomizing rotating air flow control unit (6) has three groups of step flow control valves (6-1) and outlet gas flow sensors (6-2). The valve core of the step flow control valve (6-1) controls the air output flow, and the outlet gas flow sensor (6-2) is configured to accurately and finitely detect the real-time output gas flow size. Two groups of step flow control valves (6-1) and outlet gas flow sensors (6-2) are used to control the air pressure values ​​of the external shaping air and the internal shaping air respectively; the remaining group of step flow control valves (6-1) and outlet gas flow sensor (6-2) is used to control the air pressure value of the compressed air entering the rotating air duct (4-1-9).

Images