An automatic cleaning method for surface contamination of electrostatic spray bell cup

Abstract

The application provides an automatic cleaning method for surface contamination of a static spraying rotary cup, which comprises the following steps: adding a boiling point regulator into a gas pipeline of a gas path of the static spraying equipment according to a preset adding mode; and the boiling point regulator is atomized instantly under the driving of compressed air in the gas pipeline, the surface of the rotary cup is cleaned, and the boiling point regulator is attached to the surface of the rotary cup to form a protective film. The added boiling point regulator is atomized by compressed air to clean the surface of the rotary cup, and is attached to the rotary cup to form a protective film, so that water loss and drying are prevented, water loss of the water-based solvent is prevented, the water-based solvent is adhered to the rotary cup, the surface contamination of the rotary cup is automatically cleaned on line, manual cleaning is not needed during shutdown, the production efficiency is improved, manpower is saved, and the equipment is maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water-based coating, in particular to a method for automatically cleaning the surface pollution of a static spraying rotary cup. BACKGROUND

[0002] With the increasing demand for product appearance effect and the further enhancement of energy saving and environmental protection awareness, electrostatic spraying technology is widely applied to surface treatment in various industries. Compared with traditional spraying, it not only saves paint, but also improves the environmental purification level, and can make the spraying process mechanized and continuous, reduce the defect rate of spraying, and obtain excellent film effect. Electrostatic spraying technology can greatly improve labor productivity and improve labor conditions, thereby obtaining considerable social and economic benefits.

[0003] Electrostatic spraying is to take the coated object as the positive electrode and ground in daily life; the coating atomization device is the negative electrode and is connected to the power supply negative high voltage, so that a high-voltage electrostatic field is formed between the two electrodes. Due to the occurrence of corona discharge in the cathode, the sprayed coating medium is negatively charged and further atomized. According to the principle of "like repels, unlike attracts", the charged coating medium is affected by the electric field force, and the coating forms a surrounding effect on the coated object, and flows along the electric lines to the positively charged object surface in a directional manner, and accumulates into an average and firmly adhered film.

[0004] With the improvement of environmental protection requirements in recent years, water-based paint is vigorously promoted in all walks of life. With the gradual improvement of technology and process, the performance of water-based paint is closer to oil-based paint. However, after the surface of the spinning cup is cleaned, the surface of the spinning cup will accumulate about 1mm thick irregularly shaped water loss paint after about half an hour, which is commonly known as skinning or hairiness. The root cause of this phenomenon is that the paint is emitted to the surrounding by high-speed centrifugation of the spinning cup, and at the same time, under the action of atomizing air and forming air, the paint is atomized into very small liquid droplets (micron level) distributed around the spinning cup. Most of the liquid droplets fly to the surface of the object under the action of the electrostatic field. A small part of the liquid droplets will fly around, and some of the liquid droplets will fall on the surface of the spinning cup. The spinning cup atomization and forming compressed air are through the internal pipeline of the gun body and intersect with the paint thrown out by the high-speed centrifugation of the spinning cup at the farthest end of the spinning cup. The collision of compressed air and high-speed spinning cup (usually rotating at 30-40 thousand revolutions per minute) generates heat. Since the main component of water-based paint is water, the liquid droplets evaporate rapidly under the blowing of compressed air (0.1-0.4mpa) and adhere the remaining part of the paint to the surface of the spinning cup. The longer the working time, the thicker the paint residue adhered to the surface of the spinning cup. This phenomenon exists more or less in water-based paint electrostatic spraying. As soon as the surface of the spinning cup starts to skin, the originally smooth surface becomes rough, causing the air resistance of the atomizing air and the forming air to be different at 360°, thereby affecting the atomization effect in different directions. That is, the surface of the spinning cup piece at the outlet of the electrostatic spray gun will be contaminated. Some water-based paints can only work normally for half an hour, and the surface of the spinning cup piece will be contaminated, so manual cleaning is required, which greatly affects the production efficiency and increases the labor intensity of workers.

[0005] Therefore, the prior art has defects and needs to be improved and developed. SUMMARY

[0006] The technical problem to be solved by the present application is to provide an automatic cleaning method for the surface pollution of the spinning cup piece of an electrostatic spraying gun, aiming at solving the problem that the surface of the spinning cup piece at the outlet of the electrostatic spray gun will be contaminated and manual cleaning is required.

[0007] The technical solution adopted by the present application to solve the technical problem is as follows:

[0008] In a first aspect, the present application provides an automatic cleaning method for the surface pollution of the spinning cup piece of an electrostatic spraying gun, which is used in an electrostatic spraying device, wherein the method comprises:

[0009] adding a boiling point regulator to the gas pipeline of the gas circuit of the electrostatic spraying device in a preset filling mode;

[0010] The boiling point regulator is atomized instantly by compressed air in the gas path air pipe, and adheres to the surface of the rotating cup piece to form a protective film.

[0011] In an implementation manner, the electrostatic spraying device comprises an electrostatic rotating cup spray gun, an air compressor, a PLC intelligent controller and a three-way valve; the electrostatic rotating cup spray gun, the air compressor and the three-way valve are connected with the PLC intelligent controller; the electrostatic rotating cup spray gun is connected with the air compressor through an atomization gas path air pipe and a forming gas path air pipe, and the three-way valve is arranged on the atomization gas path air pipe and / or the forming gas path air pipe.

[0012] In an implementation manner, the method for adding the boiling point regulator into the gas path air pipe of the electrostatic spraying device according to the preset adding mode comprises the following steps.

[0013] The PLC intelligent controller controls the opening and closing of the three-way valve according to the preset adding mode.

[0014] When the three-way valve is opened, the boiling point regulator is added into the atomization gas path air pipe and / or the forming gas path air pipe through the three-way valve.

[0015] In an implementation manner, the three-way valve is further connected with a boiling point regulator delivery pump; when the three-way valve is opened, the boiling point regulator is added into the atomization gas path air pipe and / or the forming gas path air pipe through the three-way valve, which comprises the following steps.

[0016] When the three-way valve is opened, the flow rate and pressure of the boiling point regulator are adjusted to a preset flow rate and a preset pressure through the boiling point regulator delivery pump.

[0017] The boiling point regulator is added into the atomization gas path air pipe and / or the forming gas path air pipe through the three-way valve under the condition of the preset flow rate and the preset pressure.

[0018] The preset pressure is greater than the pressure of the compressed air in the atomization gas path air pipe and / or the forming gas path air pipe.

[0019] In an implementation manner, the method further comprises the following steps.

[0020] When the three-way valve is closed, the compressed air in the atomization gas path air pipe and the forming gas path air pipe is normally supplied.

[0021] In an implementation manner, the boiling point regulator is an alcohol-based, ether-based or carboxylic acid-based water-based antifreeze.

[0022] In an implementation manner, the preset filling mode is: 1-2 times of point spraying per minute; the opening time of the three-way valve is 0.1-0.5 seconds during each time of point spraying; and the filling amount per minute is less than 1 gram.

[0023] In an implementation manner, the air compressor is provided with a temperature and humidity adjusting air conditioning control module and a full-automatic cleaning control module, the air compressor is used to provide a high-pressure air source with a set temperature and a set humidity, and the full-automatic cleaning control module is used to perform online full-automatic cleaning of the surface of the electrostatic spraying cup piece.

[0024] In a second aspect, the present application further provides an electrostatic spraying device, comprising: a memory, a processor, and an automatic cleaning program of the surface pollution of the electrostatic spraying cup piece stored in the memory and executable on the processor, and the automatic cleaning program of the surface pollution of the electrostatic spraying cup piece is executed by the processor to realize the steps of the automatic cleaning method of the surface pollution of the electrostatic spraying cup piece.

[0025] In a third aspect, the present application further provides a computer readable storage medium, which stores a computer program executable to realize the steps of the automatic cleaning method of the surface pollution of the electrostatic spraying cup piece.

[0026] The present application provides an automatic cleaning method of the surface pollution of the electrostatic spraying cup piece, which comprises: filling a boiling point adjusting agent into a gas pipeline of a gas circuit of the electrostatic spraying device according to a preset filling mode; and the boiling point adjusting agent is atomized instantly under the driving of compressed air in the gas pipeline, the surface of the cup piece is cleaned, and a protective film is formed on the surface of the cup piece. The boiling point adjusting agent filled in the present application is atomized by compressed air to clean the surface of the cup piece, and is attached to the cup to form a protective film, so that water loss and drying are prevented, the water loss of the water-based solvent is prevented, and the pollution on the surface of the cup piece is automatically cleaned online, without the need of manual cleaning during shutdown, so that the production efficiency is improved, the manpower is saved, and the equipment is maintained. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a flow chart of a preferred embodiment of the automatic cleaning method of the surface pollution of the electrostatic spraying cup piece in the present application.

[0028] Figure 2 is a structural schematic view of the three-way valve provided on the atomization gas pipeline in the automatic cleaning method of the surface pollution of the electrostatic spraying cup piece in the present application.

[0029] Figure 3 is a schematic view of the filling of the boiling point adjusting agent when the three-way valve is opened in the present application.

[0030] Figure 4This is a schematic diagram showing the normal supply of compressed air when the three-way valve is closed in this invention.

[0031] Figure 5 This is a schematic diagram of cleaning the surface of the rotating cup plate in this invention.

[0032] Figure 6 This is a schematic diagram illustrating the working principle of the fully automatic cleaning control module in the air compressor of this invention.

[0033] Figure 7 This is a functional principle block diagram of a preferred embodiment of the electrostatic spraying equipment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] Electrostatic spraying equipment includes an electrostatic rotary cup spray gun, a high-voltage electrostatic generator, a housing, ventilation and exhaust pipes, a reciprocating oscillating device, and a paint supply pump. The spray gun's atomizing nozzle can be selected with different diameter rotary cups depending on the paint and the substrate, achieving different atomization diameters. The electrostatic generator typically has a high-voltage output between 10KV and 100KV (the common range is 50KV±10KV), while the typical paint supply pump's spraying pressure is around 0.1MPa.

[0036] Electrostatic spraying has a wide range of applications and can be classified into the following categories according to different standards:

[0037] First, by industry, electrostatic spraying is applied to various industries, such as automobiles, sheet materials (wood, steel, building materials), and various parts.

[0038] Secondly, based on surface shape, it can be divided into flat surface spraying and irregular surface spraying.

[0039] Third, based on their composition, paints can be divided into oil-based and water-based paints. Water-based paints use only water as a diluent and are harmless to human health. Oil-based paints are composed of resins, color fillers, organic solvents (generally referred to as VOCs), and various additives, containing large amounts of harmful and carcinogenic substances such as methanol. The organic solvents that evaporate from the paint film after application are mostly toxic and harmful substances, causing varying degrees of pollution to both human health and the natural environment.

[0040] Water-based paints are far inferior to oil-based paints in terms of hardness, fullness, and aging resistance. Because water-based paints generally have low abrasion resistance, most consumers choose to use them only on walls, while using oil-based paints on frequently washed parts such as doors, windows, and furniture.

[0041] The water-based paint is also called "quick-drying" paint, which is mainly due to the solvent of the paint being water. Under the condition of high-speed rotating cup and high-pressure compressed air atomization, it is easy to cause the phenomenon of skinning and long hair. Some water-based paints can only work normally for half an hour before being contaminated, and must be stopped manually cleaned. This greatly affects the production efficiency and increases the labor intensity of workers. Although some industries add 2-3% of slow-drying solvents such as ethylene glycol and POM to the paint, it can only prolong the cleaning time, but cannot completely solve the problem. This method of adding chemical solvents not only increases the cost of the paint, but also brings other problems, such as too much dust due to good atomization, although it does not skin and grow hair, but the amount of mist is too large to gather in the gun body cover, and the small droplets fall on the surface of the object, making the product surface have defects and be downgraded. At the same time, it increases the leakage rate, which is not beneficial to the equipment and operators.

[0042] Please refer to Figure 1 , Figure 1 is a flow chart of the automatic cleaning of the surface pollution of the electrostatic spraying rotating cup piece in the present application. As Figure 1 shown, the automatic cleaning of the surface pollution of the electrostatic spraying rotating cup piece in the embodiment of the present application comprises:

[0043] Step S100, according to the preset filling mode, a boiling point regulator is filled into the air pipe of the air path of the electrostatic spraying equipment.

[0044] Step S200, the boiling point regulator is atomized immediately under the driving of the compressed air in the air path, and is attached to the surface of the rotating cup piece to form a protective film.

[0045] Specifically, the filled boiling point regulator has two main functions. The first function is that the filled boiling point regulator cleans the surface of the rotating cup piece by atomization of compressed air, and the second function is that the filled boiling point regulator is attached to the rotating cup to form a film to prevent water loss and drying, and the water loss of the water-based solvent is adhered to the rotating cup.

[0046] In one implementation, the electrostatic spraying equipment comprises an electrostatic rotating cup spray gun, an air compressor, a PLC intelligent controller and a three-way valve; the electrostatic rotating cup spray gun, the air compressor and the three-way valve are connected with the PLC intelligent controller; the electrostatic rotating cup spray gun and the air compressor are connected with an atomization air path air pipe and a forming air path air pipe, and the three-way valve is arranged on the atomization air path air pipe and / or the forming air path air pipe.

[0047] Specifically, as Figure 2As shown, the electrostatic spraying equipment's electrostatic rotary cup spray gun includes atomization gas path air pipe 1, forming gas path air pipe 2, coating supply pipe 3, three-way valve control gas path 4, coating return pipe 5 and air motor driving gas path 6. The application fully utilizes two gas pipes 1 and 2, and a three-way valve is added before entering the hole of the gun pipe. There are three ways to add the three-way valve, the first way is to add the three-way valve only on the atomization gas path air pipe 1, the second way is to add the three-way valve only on the forming gas path air pipe 2, and the third way is to add the three-way valve on both the atomization gas path air pipe 1 and the forming gas path air pipe 2.

[0048] The application does not change the structure of the rotary cup spray gun, and uses existing pipelines to add slow-drying solvent. The spray gun has three compressed air pipes entering the inside of the gun body. One pipe supplies power for the rotation control of the spindle rotary cup, providing power for the rotation of the motor. The air pressure is rapidly reduced after the fan blade, which is not conducive to the atomization of the solvent. The other two pipes are atomization gas path 1 and forming gas path 2 air pipes, which directly inject compressed air on the upper surface of the rotary cup spray head.

[0049] In one embodiment, the step S100 specifically comprises:

[0050] Step S110, the PLC intelligent controller controls the opening and closing of the three-way valve according to the preset filling mode;

[0051] Step S120, when the three-way valve is opened, the boiling point regulator is added to the atomization gas path air pipe and / or the forming gas path air pipe through the three-way valve.

[0052] Specifically, the opening time and closing time are arbitrarily set by using the PLC controller, so that the effect of long-term non-stick cup and non-coating is achieved with the smallest flow.

[0053] In one embodiment, as Figure 3 and Figure 4 , the three-way valve 10 is also connected with a boiling point regulator delivery pump 11; the step S120 specifically comprises:

[0054] Step S121, when the three-way valve is opened, the flow and pressure of the boiling point regulator are adjusted to the preset flow and preset pressure by adjusting the boiling point regulator delivery pump;

[0055] Step S122, the boiling point regulator is added to the atomization gas path air pipe and / or the forming gas path air pipe through the three-way valve under the condition of the preset flow and the preset pressure.

[0056] Wherein, the preset pressure is greater than the pressure of the compressed air in the atomization gas path air pipe and / or the forming gas path air pipe.

[0057] Specifically, as Figure 3 andFigure 5 As shown, when solvent needs to be added, the three-way valve 10 is opened, the solvent inlet is communicated with the solvent outlet, at this time, the solvent 12 is sprayed into the air pipe 1 and / or 2 according to the preset adding mode, the solvent is atomized immediately under the driving of the compressed air 13, the compressed air 14 with the boiling point adjusting agent is obtained, and reaches the spinning cup nozzle quickly, and is uniformly sprayed on the surface of the spinning cup sheet 15, so that the cleaning and lubricating effects are achieved. It should be noted that the conventional compressed air has a pressure of 0-0.6 Mpa, and the pressure of the added solvent must be greater than this pressure, so that the solvent can be sprayed into the air pipe. In the practical process, in addition to controlling the pressure of the added solvent, the flow rate also needs to be controlled.

[0058] In an implementation mode, the method further comprises: when the three-way valve is closed, the compressed air in the atomizing air path air pipe and the forming air path air pipe is normally supplied. That is, as shown in Figure 4 When the three-way valve 10 is closed, the solvent inlet is directly communicated with the solvent return port, and the atomizing and forming control compressed air is normally supplied.

[0059] In an embodiment, the boiling point adjusting agent is an alcohol, ether or carboxylic acid type water-based antifreeze. Specifically, the boiling point adjusting agent is an alcohol, ether or carboxylic acid type water-based antifreeze with the characteristics of high boiling point, low freezing point and low dynamic viscosity, such as ethylene glycol, ethylene glycol butyl ether, diethylene glycol butyl ether or water-based antifreeze thereof, etc., and the characteristic use is to regularly and quantitatively spray the atomizing air or the atomizing forming air on the spinning cup sheet, to realize online wet cleaning of the contaminants on the spinning cup sheet, and to provide working solvents suitable for environmental temperature changes.

[0060] In an embodiment, the preset adding mode is: spraying 1-2 times per minute; the opening time of the three-way valve is 0.1-0.5 seconds each time; and the adding amount per minute is less than 1 gram. Specifically, spraying 1-2 times per minute, the opening time is 0.1-0.5 seconds, and the adding amount per minute is less than 1 gram, while the paint consumption per minute is between 200-500 grams, the adding amount is less than 0.5% of the paint, and there is almost no effect on the density of the paint, so as to ensure the effect of the surface of the object. Generally, the cost of slow drying type solvent is higher. According to the conventional paint, 20% is added, which is less than 0.5% of the direct paint adding mode, not only the solvent cost is saved, but also the downtime caused by the regular cleaning of the operation workers is saved, and the labor intensity of the employees is greatly reduced. The present application completely solves the cup head pollution problem of fast drying type water-based paint in the production process, and has great popularization and application value in economy, reliability and operability.

[0061] In one implementation, the air compressor includes a temperature and humidity control module and a fully automatic cleaning control module. The air compressor provides a high-pressure air source with a set temperature and humidity, and the fully automatic cleaning control module performs online fully automatic cleaning of the electrostatic rotary cup coating surface. The air compressor of this invention can provide a high-pressure air source with a set temperature and humidity, and the fully automatic cleaning control module enables online fully automatic cleaning of contaminants from the electrostatic rotary cup coating surface.

[0062] Specifically, such as Figure 6 As shown, the fully automatic cleaning control module in the air compressor includes four air circuits: atomizing air 811, atomizing and shaping air 812, paint three-way valve control air 814, and rotary cup air 813, which are respectively connected to the atomizing air circuit pipe, shaping air circuit pipe, paint three-way valve control air circuit, and rotary cup drive air circuit of the electrostatic rotary cup spray gun. The air compressor atomizing air 811 and atomizing and shaping air 812 are respectively connected to atomizing air three-way valve 1 and atomizing air three-way valve 2, used to control the switching of the opening and closing of the boiling point regulator in the atomizing air circuit and the shaping air circuit; the paint three-way valve control air 814 is connected to the paint three-way valve control air circuit, used to control the opening and closing of the paint in the paint supply pipe 3 and the paint return pipe 5; the rotary cup air 813 is connected to the rotary cup drive air circuit, used to drive the rotary cup pneumatic motor.

[0063] In one embodiment, such as Figure 7 As shown, based on the above-mentioned automatic cleaning method for surface contamination of electrostatic spraying rotary cup plates, the present invention also provides an electrostatic spraying device, including a processor 21 and a memory 22. Figure 3 Only some components of the electrostatic spraying equipment are shown; however, it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0064] In some embodiments, the memory 22 may be an internal storage unit of the electrostatic spraying equipment, such as a hard drive or memory of the electrostatic spraying equipment. In other embodiments, the memory 22 may be an external storage device of the electrostatic spraying equipment, such as a plug-in hard drive, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electrostatic spraying equipment. Further, the memory 22 may include both internal and external storage units of the electrostatic spraying equipment. The memory 22 is used to store application software and various types of data installed on the electrostatic spraying equipment, such as the program code for installing the electrostatic spraying equipment. The memory 22 can also be used to temporarily store data that has been output or will be output. In one embodiment, the memory 22 stores an automatic cleaning program 23 for surface contamination of the electrostatic spraying rotary cup plate, which can be executed by the processor 21 to realize the automatic cleaning method for surface contamination of the electrostatic spraying rotary cup plate in this application.

[0065] In some embodiments, the processor 21 may be a central processing unit (CPU), a microprocessor, or other data processing chip, used to run program code stored in the memory 22 or process data, such as executing an automatic cleaning method for surface contamination of the electrostatic spraying rotary cup plate.

[0066] In one embodiment, when processor 21 executes the automatic cleaning program 23 for surface contamination of electrostatic sprayed rotary cup plates stored in memory 22, the following steps are performed:

[0067] Boiling point modifier is added to the gas line and gas pipe of the electrostatic spraying equipment according to the preset filling method;

[0068] The boiling point regulator is instantly atomized by compressed air in the gas pipeline, cleaning the surface of the rotary cup plate and adhering to the surface of the rotary cup plate to form a protective film.

[0069] The electrostatic spraying equipment includes: an electrostatic rotary cup spray gun, an air compressor, a PLC intelligent controller, and a three-way valve; the electrostatic rotary cup spray gun, the air compressor, and the three-way valve are all connected to the PLC intelligent controller; an atomizing air path pipe and a forming air path pipe are connected between the electrostatic rotary cup spray gun and the air compressor, and the three-way valve is installed on the atomizing air path pipe and / or the forming air path pipe.

[0070] The step of adding a boiling point regulator to the gas line of the electrostatic spraying equipment according to a preset filling method includes:

[0071] The PLC intelligent controller controls the opening and closing of the three-way valve according to a preset filling mode.

[0072] When the three-way valve is opened, the boiling point regulator is filled into the atomizing air pipe and / or the forming air pipe through the three-way valve.

[0073] The three-way valve is also connected with a boiling point regulator delivery pump; when the three-way valve is opened, the boiling point regulator is filled into the atomizing air pipe and / or the forming air pipe through the three-way valve, comprising:

[0074] When the three-way valve is opened, the flow and pressure of the boiling point regulator are adjusted to a preset flow and a preset pressure through the boiling point regulator delivery pump;

[0075] The boiling point regulator is filled into the atomizing air pipe and / or the forming air pipe through the three-way valve under the condition of the preset flow and the preset pressure;

[0076] Wherein, the preset pressure is greater than the pressure of the compressed air in the atomizing air pipe and / or the forming air pipe.

[0077] The method further comprises:

[0078] When the three-way valve is closed, the compressed air in the atomizing air pipe and the forming air pipe is normally supplied.

[0079] The boiling point regulator is an alcohol, ether or carboxylic acid aqueous antifreeze.

[0080] The preset filling mode is: 1-2 times of point spraying per minute; the opening time of the three-way valve is 0.1-0.5 seconds during each point spraying; and the filling amount per minute is less than 1 gram.

[0081] The air compressor is provided with a temperature and humidity adjusting air conditioning control module and a full-automatic cleaning control module, the air compressor is used for providing a high-pressure air source with a set temperature and a set humidity, and the surface of the electrostatic spinning cup piece is cleaned online and automatically through the full-automatic cleaning control module.

[0082] The application also provides a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program can be executed to realize the steps of the automatic cleaning method of the surface pollution of the electrostatic spraying spinning cup piece.

[0083] In summary, the automatic cleaning method for the surface pollution of the electrostatic spraying rotary cup disclosed by the application comprises: adding a boiling point adjusting agent into the gas pipeline of the gas circuit of the electrostatic spraying equipment according to a preset adding mode; the boiling point adjusting agent is atomized instantly under the driving of the compressed air in the gas pipeline, the surface of the rotary cup is cleaned, and a protective film is formed on the surface of the rotary cup. The added boiling point adjusting agent atomizes the surface of the rotary cup by the compressed air, adheres to the rotary cup, and forms a protective film, so that the loss of moisture and drying are prevented, the water loss of the water-based solvent is prevented, the water-based solvent is adhered to the rotary cup, the pollution on the surface of the rotary cup is automatically cleaned on line, manual cleaning is not needed, the production efficiency is improved, the manpower is saved, and the equipment is maintained.

[0084] It should be understood that the application is not limited to the above examples, and can be improved or changed according to the above description for those skilled in the art, and all these improvements and changes shall belong to the protection scope of the appended claims of the application.

Claims

1. An automatic cleaning method for surface contamination of electrostatic spraying rotary cup plates, used in electrostatic spraying equipment, characterized in that, The method includes: Boiling point modifier is added to the gas line and gas pipe of the electrostatic spraying equipment according to the preset filling method; The boiling point regulator is instantly atomized by compressed air in the gas pipeline, cleaning the surface of the rotary cup plate and adhering to the surface of the rotary cup plate to form a protective film. The electrostatic spraying equipment includes: an electrostatic rotary cup spray gun, an air compressor, a PLC intelligent controller, and a three-way valve; the electrostatic rotary cup spray gun, the air compressor, and the three-way valve are all connected to the PLC intelligent controller; an atomizing air path pipe and a forming air path pipe are connected between the electrostatic rotary cup spray gun and the air compressor, and the three-way valve is installed on the atomizing air path pipe and / or the forming air path pipe; The step of adding a boiling point regulator to the gas line of the electrostatic spraying equipment according to a preset filling method includes: The PLC intelligent controller controls the opening and closing of the three-way valve according to the preset filling method; When the three-way valve is opened, a boiling point regulator is added to the atomizing gas path pipe and / or the forming gas path pipe through the three-way valve.

2. The automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates according to claim 1, characterized in that, The three-way valve is also connected to a boiling point regulator delivery pump; when the three-way valve is open, boiling point regulator is added to the atomizing gas path pipe and / or the forming gas path pipe through the three-way valve, including: When the three-way valve is opened, the flow rate and pressure of the boiling point regulator are adjusted to the preset flow rate and preset pressure by adjusting the boiling point regulator delivery pump; The boiling point regulator is added to the atomizing gas path pipe and / or the forming gas path pipe through the three-way valve under the preset flow rate and the preset pressure. Wherein, the preset pressure is greater than the pressure of the compressed air in the atomizing air path pipe and / or the forming air path pipe.

3. The automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates according to claim 1, characterized in that, The method further includes: When the three-way valve is closed, the compressed air in the atomizing air path pipe and the forming air path pipe is supplied normally.

4. The automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates according to claim 1, characterized in that, The boiling point regulator is an aqueous antifreeze fluid composed of alcohols, ethers, or carboxylic acids.

5. The automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates according to claim 1, characterized in that, The preset dispensing method is as follows: spray 1-2 times per minute; the opening time of the three-way valve is 0.1-0.5 seconds for each spray; and the dispensing amount per minute is less than 1 gram.

6. The automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates according to claim 1, characterized in that, The air compressor is equipped with a temperature and humidity control module and a fully automatic cleaning control module. The air compressor is used to provide a high-pressure air source with a set temperature and humidity, and performs online fully automatic cleaning of the electrostatic rotary cup spraying surface of the rotary cup plate through the fully automatic cleaning control module.

7. An electrostatic spraying device, characterized in that, include: The system includes a memory, a processor, and an automatic cleaning program for surface contamination of electrostatic spraying rotary cup plates stored in the memory and executable on the processor. When executed by the processor, the automatic cleaning program for surface contamination of electrostatic spraying rotary cup plates implements the steps of the automatic cleaning method for surface contamination of electrostatic spraying rotary cup plates as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that can be executed to implement the steps of the automatic cleaning method for surface contamination of electrostatic sprayed rotary cup plates as described in any one of claims 1 to 6.

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