Electrostatic spraying method and system for valve

Abstract

The invention provides a valve electrostatic spraying method and system.The method comprises the steps that firstly, a valve channel is sealed through a tool; 2, the valve to be sprayed is subjected to surface treatment; 3, a coating is prepared, and spraying parameters are determined; 4, electrostatic spraying of the valve is conducted according to the spraying parameters; and 5, after spraying is completed, curing treatment is conducted on the coating. According to the electrostatic spraying method and system for the valve, the requirement limitation of a sealing piece of a soft sealing valve on the temperature is considered, a valve channel is sealed through a tool, then the electrostatic spraying technology is introduced to replace traditional paint spraying, the adhesive strength of a coating on the surface of the valve is improved, and the salt mist resistance of the surface of the valve is provided for an outlet valve; and the protection time of the surface of the valve is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic spraying, and particularly relates to a method and system for electrostatic spraying of valves. Background Art

[0002] At present, when treating the surfaces of valves at home and abroad, painting technology is generally adopted. The disadvantages brought by painting technology are as follows: 1. It is easy to cause surface scratches; 2. The surface protection time is short; 3. The protective layer is thin; 4. Export products are prone to salt spray erosion.

[0003] At present, electrostatic spraying technology has been widely used in our country, such as the automotive parts industry, the household appliance washing machine shell industry, and the radiator industry, etc. However, since the soft seal of the valve is sealed with a rubber ring, and the rubber ring cannot withstand more than 180°C, while the requirement of electrostatic spraying technology is 220°C, the electrostatic spraying technology is not currently used for the valve housing in the valve industry.

[0004] In view of this, there is an urgent need for a method and system for electrostatic spraying of valves to at least solve the above deficiencies. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a method and system for electrostatic spraying of valves. Considering the temperature requirement limitation of the soft seal valve seal, the valve channel is sealed with a tooling, and then the electrostatic spraying technology is introduced to replace the traditional painting, which improves the adhesion strength of the paint on the valve surface, provides the valve surface with anti-salt spray performance for export valves, and greatly improves the surface protection time of the valves.

[0006] A method for electrostatic spraying of valves provided by an embodiment of the present invention includes:

[0007] Step 1: Seal the valve channel with a tooling;

[0008] Step 2: Perform surface treatment on the valve to be sprayed;

[0009] Step 3: Modulate the paint and determine the spraying parameters;

[0010] Step 4: Perform electrostatic spraying on the valve according to the spraying parameters;

[0011] Step 5: After spraying is completed, cure the paint.

[0012] Preferably, Step 2: Perform surface treatment on the valve to be sprayed, including:

[0013] Obtain the valve material and the valve treatment requirements;

[0014] According to the valve material and the valve treatment requirements, determine the surface treatment method and perform corresponding treatment. The surface treatment methods include: degreasing, rust removal, grinding, dust removal, and phosphating.

[0015] Preferably, step 3: Modulate the coating and determine the spraying parameters, including:

[0016] Obtain the spraying requirements;

[0017] According to the spraying requirements, determine the modulation ratio of the coating, solvent and thinner of the required color, and uniformly modulate the coating according to the modulation ratio;

[0018] According to the required spraying effect and the material, shape and size of the valve, determine the spraying parameters, and the spraying parameters include: air pressure, voltage, spraying distance and spray gun angle.

[0019] Preferably, step 1: Seal the valve passage with a tooling, including:

[0020] Obtain the valve type corresponding to the valve passage that needs to be sealed with the tooling;

[0021] According to the valve type, dispatch the intelligent trolley to deliver the required tooling;

[0022] After the required tooling is delivered, install the tooling;

[0023] During the installation of the tooling, conduct the standardization detection and standardization reminder of the installers;

[0024] After the tooling installation is completed, verify the sealing performance of the valve passage;

[0025] If the sealing performance verification of the valve passage passes, the tooling sealing of the valve passage is completed.

[0026] Preferably, step 4: Conduct electrostatic spraying of the valve according to the spraying parameters, including:

[0027] Based on the machine vision detection technology, obtain the spraying process image during the spraying process;

[0028] According to the spraying process image, obtain the current spraying effect description of the valve;

[0029] Obtain the current expected spraying effect description;

[0030] If the difference between the current expected spraying effect description and the current spraying effect description is greater than or equal to the preset difference threshold, determine the difference spraying area;

[0031] Determine the remaining spraying area corresponding to the current unexecuted spraying parameters;

[0032] Determine the target spraying area according to the difference spraying area and the remaining spraying area;

[0033] Update the spraying parameters according to the target spraying area.

[0034] Preferably, according to the target spraying area, update the spraying parameters, including:

[0035] Simulate spraying according to the current unexecuted spraying parameters, and obtain the area to be sprayed that is ready to be sprayed each time of simulation;

[0036] Extract the regional relationship features of the target spraying area and the area to be sprayed, and obtain the regional relationship feature set;

[0037] According to the regional relationship feature set and the screening strategy library of the current unexecuted spraying parameters, determine the local screening spraying parameters in the current unexecuted spraying parameters;

[0038] Determine the first task area of the local screening spraying parameters, and use the area other than the first task area in the target spraying area as the second task area;

[0039] According to the current spraying equipment parameters, the second task area and the local screening spraying parameters, update the spraying parameters.

[0040] Preferably, according to the current spraying equipment parameters, the second task area and the local screening spraying parameters, update the spraying parameters, including:

[0041] Analyze the local screening spraying parameters to determine the connection parameters between the first task area and the second task area;

[0042] According to the current spraying equipment parameters and the connection parameters, design the supplementary spraying parameters for the second task area;

[0043] Based on the supplementary spraying parameters and the local screening spraying parameters, reorganize the current unexecuted spraying parameters to obtain the updated spraying parameters.

[0044] Preferably, according to the current spraying equipment parameters and the connection parameters, design the supplementary spraying parameters for the second task area, including:

[0045] Set up a spraying simulation model according to the device parameters of the spraying device;

[0046] Obtain the relative position relationship between the spraying device and the second task area;

[0047] According to the current spraying equipment parameters, the connection parameters and the relative position relationship, generate a simulated spraying task for the spraying simulation model;

[0048] Connect the spraying simulation model to the manual spraying AI model to obtain the execution strategy of the simulated spraying task;

[0049] If the execution strategy of the simulated spraying task fails to be obtained, reduce the first task area and re-determine the simulated spraying task;

[0050] Obtain the simulation spraying task execution strategy according to the re-determined simulation spraying task until the acquisition is successful;

[0051] If the simulation execution result of the simulation spraying task execution strategy meets the task expectation conditions, extract supplementary spraying parameters according to the corresponding simulation spraying task execution strategy;

[0052] The task expectation conditions include:

[0053] When the number of simulation spraying task execution strategies is 1, the regional difference degree between the simulation result and the simulated second task area is less than or equal to the preset difference degree threshold;

[0054] When the number of simulation spraying task execution strategies is greater than 1, the regional difference degree between the simulation result and the simulated second task area is the smallest, and the smallest regional difference degree is less than or equal to the preset difference degree threshold.

[0055] A valve electrostatic spraying system provided by an embodiment of the present invention includes:

[0056] A sealing module for sealing the valve passage with a tooling;

[0057] A surface treatment module for surface-treating the valve to be sprayed;

[0058] A spraying parameter determination module for modulating the paint and determining the spraying parameters;

[0059] A spraying module for electrostatic spraying of the valve according to the spraying parameters;

[0060] A curing module for curing the paint after spraying is completed.

[0061] Preferably, the surface treatment module surface-treats the valve to be sprayed, including:

[0062] Obtain the valve material and the valve treatment requirements;

[0063] According to the valve material and the valve treatment requirements, determine the surface treatment method and perform corresponding treatment. The surface treatment methods include: degreasing, rust removal, grinding, dust removal, and phosphating.

[0064] Preferably, the spraying parameter determination module modulates the paint and determines the spraying parameters, including:

[0065] Obtain the spraying requirements;

[0066] According to the spraying requirements, determine the modulation ratio of the paint, solvent, and diluent of the required color, and uniformly modulate the paint according to the modulation ratio;

[0067] According to the required spraying effect and the material, shape and size of the valve, determine the spraying parameters, which include: air pressure, voltage, spraying distance and spray gun angle.

[0068] Preferably, the spraying module performs electrostatic spraying on the valve according to the spraying parameters, including:

[0069] Based on machine vision detection technology, obtain the spraying process image during the spraying process;

[0070] According to the spraying process image, obtain the current spraying effect description of the valve;

[0071] Obtain the current expected spraying effect description;

[0072] If the description difference between the current expected spraying effect description and the current spraying effect description is greater than or equal to the preset difference threshold, determine the differential spraying area;

[0073] Determine the remaining spraying area corresponding to the currently unexecuted spraying parameters;

[0074] Determine the target spraying area according to the differential spraying area and the remaining spraying area;

[0075] Update the spraying parameters according to the target spraying area.

[0076] Preferably, the spraying module updates the spraying parameters according to the target spraying area, including:

[0077] Simulate spraying according to the currently unexecuted spraying parameters. Each time of simulation, obtain the area to be sprayed that is ready for spraying;

[0078] Extract the regional relationship feature of the target spraying area and the area to be sprayed, and obtain the regional relationship feature set;

[0079] According to the regional relationship feature set and the screening strategy library of the currently unexecuted spraying parameters, determine the locally screened spraying parameters in the currently unexecuted spraying parameters;

[0080] Determine the first task area of the locally screened spraying parameters, and use the area other than the first task area in the target spraying area as the second task area;

[0081] Update the spraying parameters according to the current spraying equipment parameters, the second task area and the locally screened spraying parameters.

[0082] The beneficial effects of the present invention are as follows:

[0083] The present invention takes into account the temperature requirement limitation of the soft seal valve seal, uses a tooling to seal the valve channel, and then introduces electrostatic spraying technology to replace traditional painting, which improves the adhesion strength of the paint on the valve surface, provides the valve surface with anti-salt spray performance for export valves, and greatly improves the protection time of the valve surface.

[0084] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in this application document.

[0085] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0086] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0087] Figure 1 is a schematic diagram of a method for electrostatic spraying of a valve in an embodiment of the present invention;

[0088] Figure 2 is a schematic diagram of a system for electrostatic spraying of a valve in an embodiment of the present invention. Detailed Embodiments

[0089] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0090] An embodiment of the present invention provides a method for electrostatic spraying of a valve, as Figure 1 shown, including:

[0091] Step 1: Seal the valve passage with a tooling.

[0092] Step 2: Perform surface treatment on the valve to be sprayed.

[0093] Among them, Step 2: Perform surface treatment on the valve to be sprayed, including:

[0094] Obtain the valve material and the valve treatment requirements.

[0095] Determine the surface treatment method and perform corresponding treatment according to the valve material and the valve treatment requirements. The surface treatment methods include: degreasing, rust removal, grinding, dust removal, and phosphating.

[0096] Step 3: Modulate the coating and determine the spraying parameters.

[0097] Among them, Step 3: Modulate the coating and determine the spraying parameters, including:

[0098] Obtain the spraying requirements.

[0099] According to the spraying requirements, determine the mixing ratio of the paint, solvent and thinner of the required color, and uniformly mix the paint according to the mixing ratio;

[0100] According to the required spraying effect and the material, shape and size of the valve, determine the spraying parameters, and the spraying parameters include: air pressure, voltage, spraying distance and spray gun angle;

[0101] Step 4: Carry out electrostatic spraying of the valve according to the spraying parameters;

[0102] Step 5: After spraying is completed, carry out curing treatment on the paint;

[0103] Among them, Step 5: After spraying is completed, carry out curing treatment on the paint, including:

[0104] Carry out curing treatment by heating the paint after electrostatic spraying to 220 °C.

[0105] The working principle and beneficial effects of the above technical solution are as follows:

[0106] The tooling refers to plugs, sealing sleeves, jigs, etc. Sealing the valve passage with tooling (for example: using a flange sealing gasket to seal a butterfly valve) is to prevent the paint from entering the valve during the electrostatic spraying process and ensure that the spraying only acts on the valve surface. According to the valve material and valve treatment requirements, determine the surface treatment method of the valve and carry out corresponding treatment to improve the subsequent spraying effect and the adhesion of the coating film. Obtain the spraying requirements and determine the mixing ratio of the paint, solvent and thinner of the required color, and uniformly mix the paint according to the mixing ratio, so that the viscosity and solid content of the paint meet the requirements and ensure the uniformity of the paint; according to the required spraying effect and the characteristics of the workpiece material, shape, size, etc., determine the parameters of the spraying equipment. The spraying parameters include: air pressure, voltage, spraying distance, spray gun angle, etc. The selection of spraying parameters needs to be adjusted and tested according to the actual situation. Pour the prepared paint into the cup of the spray gun, turn on the air source, and spray the paint in the cup. The electrostatic field makes the paint form a uniform layer on the workpiece surface, ensuring uniform and consistent spraying without missing spraying or omission. The paint after electrostatic spraying needs to be cured by heating to 220 °C to make the coating film have a certain hardness and adhesion. After spraying is completed, conduct quality inspection on the sprayed workpiece, mainly checking whether the indexes such as the adhesion of the coating film, the thickness of the coating film, and the appearance quality meet the requirements. After the spraying process is over, it is necessary to clean and maintain the spraying equipment to keep the equipment running normally. Finally, record and organize the various process parameters of electrostatic spraying, the paint mixing ratio, the workpiece quality, etc. for subsequent reference and improvement.

[0107] In view of the temperature requirements for the seals of soft-sealed valves, the present invention uses a tooling to seal the valve passage, and then introduces electrostatic spraying technology to replace traditional painting, improving the adhesion strength of the coating on the valve surface, providing the valve surface with anti-salt spray performance for export valves, and greatly enhancing the protection time of the valve surface.

[0108] In one embodiment, step 1: Seal the valve passage with tooling, including:

[0109] Obtain the valve type corresponding to the valve passage that needs to be sealed with tooling;

[0110] According to the valve type, dispatch an intelligent trolley to deliver the required tooling;

[0111] After the required tooling is delivered, install the tooling;

[0112] During the installation of the tooling, conduct standardization detection and reminder for the installers;

[0113] After the tooling installation is completed, verify the sealing performance of the valve passage;

[0114] If the sealing performance verification of the valve passage is passed, the tooling seal of the valve passage is completed.

[0115] The working principle and beneficial effects of the above technical solution are as follows:

[0116] The valve type refers to the type of valve, such as: ball valve, butterfly valve. According to the valve type, dispatch an intelligent trolley to deliver the required tooling; The tooling installation is as follows: The tooling installer inserts the required tooling into the entrance of the valve passage to completely cover the opening, such as using a threaded metal plug to tighten and fix. During this process, based on the preset shooting device on-site, conduct standardization detection and reminder for the installer; Finally, the tooling installer verifies the sealing performance of the valve passage to prevent subsequent paint from entering the valve passage, improving the tightness and high-temperature resistance of the valve.

[0117] In one embodiment, step 4: Conduct electrostatic spraying of the valve according to the spraying parameters, including:

[0118] Based on machine vision detection technology, obtain the spraying process images during the spraying process;

[0119] According to the spraying process images, obtain the current spraying effect description of the valve;

[0120] Obtain the current expected spraying effect description;

[0121] If the difference between the current expected spraying effect description and the current spraying effect description is greater than or equal to the preset difference threshold, determine the differential spraying area;

[0122] Determine the remaining spraying area corresponding to the current unexecuted spraying parameters;

[0123] Determine the target spraying area according to the differential spraying area and the remaining spraying area;

[0124] Update the spraying parameters according to the target spraying area.

[0125] The working principle and beneficial effects of the above technical solution are as follows:

[0126] The spraying process image is obtained by shooting with a shooting device preset around the spraying production line each time the spraying device pauses spraying. Each time the spraying device pauses spraying means that a complete planned spraying operation includes multiple spraying processes, and at the end of each spraying process, the spraying device will temporarily pause spraying; the current spraying effect description is a description vector describing the current spraying situation of the valve constructed based on the image features extracted from the spraying process image; the current expected spraying effect description is a description vector describing the current expected spraying situation constructed based on the image features of the expected spraying image when the spraying device pauses spraying this time; the description difference is the vector angle between the two vectors, and the description difference being greater than or equal to the preset difference threshold means the vector angle is greater than or equal to a preset value, such as: 15°. The differential spraying area is the differential part of the spraying area in the expected spraying image and the spraying process image; when determining the target spraying area according to the differential spraying area and the remaining spraying area, first determine the part sprayed less than expected and the part sprayed more than expected according to the differential spraying area, remove the part sprayed more than expected in the remaining spraying area and jointly use it with the part sprayed less than expected as the target spraying area; update the spraying parameters based on the required spraying area (target spraying area) newly determined based on each latest obtained spraying process image, avoiding omissions and repetitions in spraying when there are errors in the fixed setting of spraying parameters during the spraying process, and greatly improving the electrostatic spraying accuracy.

[0127] In one embodiment, updating the spraying parameters according to the target spraying area includes:

[0128] Simulate spraying according to the currently unexecuted spraying parameters, and obtain the area to be sprayed that is ready to be sprayed each time of simulation;

[0129] Extract the area relationship features of the target spraying area and the area to be sprayed, and obtain the area relationship feature set;

[0130] Determine the local screening spraying parameters in the currently unexecuted spraying parameters according to the area relationship feature set and the screening strategy library of the currently unexecuted spraying parameters;

[0131] Determine the first task area of the local screening spraying parameters, and use the area other than the first task area in the target spraying area as the second task area;

[0132] Analyze the local screening spraying parameters to determine the connection parameters between the first task area and the second task area;

[0133] Design supplementary spraying parameters for the second task area according to the current spraying equipment parameters and connection parameters;

[0134] Based on the supplementary spraying parameters and the local screening spraying parameters, reorganize the current unexecuted spraying parameters to obtain updated spraying parameters.

[0135] The working principle and beneficial effects of the above technical solutions are as follows:

[0136] Each simulation refers to pausing the spraying corresponding to the current unexecuted spraying parameters once, and then corresponding to one simulation; the regional relationship feature is the regional position relationship between the overlapping and non-overlapping parts of the target spraying area and the to-be-sprayed area; the screening strategy library of the current unexecuted spraying parameters stores multiple screening schemes, for example: where is the local spraying area corresponding to the current unexecuted spraying parameters screened by which screening scheme. When screening, first determine the largest overlapping area of the target spraying area and the to-be-sprayed area, and the local spraying area (the first task area) corresponding to the local screening spraying parameters is consistent with the largest overlapping area; the connection parameters are the air pressure, voltage, spraying distance, and spray gun angle at the earliest time sequence and the air pressure, voltage, spraying distance, and spray gun angle at the latest time sequence of the local screening spraying parameters; according to the current spraying equipment parameters and connection parameters, design supplementary spraying parameters for the second task area. When designing, it should be able to spray the second task area evenly and be able to connect with the local screening spraying parameters; when reorganizing the current unexecuted spraying parameters, retain the local screening spraying parameters set in the system, newly set supplementary spraying parameters, and reorganize the spraying time sequence according to the designed time sequence logic. Finally, obtain updated spraying parameters, without having to reset the parameters of all areas of the target spraying area every time, improving the update efficiency of the spraying parameters.

[0137] In one embodiment, designing supplementary spraying parameters for the second task area according to the current spraying equipment parameters and connection parameters includes:

[0138] Set a spraying simulation model according to the device parameters of the spraying device;

[0139] Obtain the relative position relationship between the spraying device and the second task area;

[0140] Generate a simulated spraying task for the spraying simulation model according to the current spraying equipment parameters, connection parameters, and relative position relationship;

[0141] Connect the spraying simulation model to the manual spraying AI model to obtain a simulated spraying task execution strategy;

[0142] If the acquisition of the simulated spraying task execution strategy fails, reduce the first task area and re-determine the simulated spraying task;

[0143] Obtain the simulation spraying task execution strategy according to the re-determined simulation spraying task until the acquisition is successful;

[0144] If the simulation execution result of the simulation spraying task execution strategy meets the task expectation conditions, extract supplementary spraying parameters according to the corresponding simulation spraying task execution strategy;

[0145] The task expectation conditions include:

[0146] When the number of simulation spraying task execution strategies is 1, the regional difference degree between the simulation result and the simulation second task area is less than or equal to the preset difference degree threshold;

[0147] When the number of simulation spraying task execution strategies is greater than 1, the regional difference degree between the simulation result and the simulation second task area is the smallest, and the smallest regional difference degree is less than or equal to the preset difference degree threshold.

[0148] The working principle and beneficial effects of the above technical solution are:

[0149] The device parameters are the three-dimensional parameters and spraying performance parameters of the spraying device. The spraying simulation model is a three-dimensional model that restores the spraying device 1:1 and has the function of simulating spraying performance at the same time; according to the current spraying equipment parameters, connection parameters and relative position relationship, the simulation spraying task generated by the spraying simulation model is: set the initial state of the spraying simulation model according to the current spraying equipment parameters (such as: initial nozzle angle, initial air pressure value and initial voltage value, etc.), set the intermediate state of the spraying simulation model according to the connection parameters (such as: nozzle angle at a certain time sequence, air pressure value at a certain time sequence and voltage value at a certain time sequence, etc.), and set the area of the simulation second task area corresponding to the relative position relationship of the spraying three-dimensional model as the simulation target; the manual spraying AI model is obtained through training based on a large number of records of the process of manual spraying with a spray gun according to different spraying requirements, and it can guide the spraying simulation model to automatically generate a simulation spraying task execution strategy according to the simulation spraying task.

[0150] However, due to strict constraint conditions, the simulated spraying task execution strategy may not necessarily be obtained. Therefore, when the acquisition of the simulated spraying task execution strategy fails, the first task area is reduced. Reducing the first task area means: re-determining the first task area based on the next spraying pause corresponding to the spraying pause of the current first task area; after reduction, more connection parameters are introduced to re-determine the simulated spraying task, and the simulated spraying task execution strategy is obtained according to the re-determined simulated spraying task until the acquisition is successful, avoiding the system constraint conditions being too strict and causing the spraying parameter update to get stuck; when the simulation execution result meets the task expected conditions, supplementary spraying parameters are extracted according to the corresponding simulated spraying task execution strategy. The task expected conditions are: when there is only one simulated spraying task execution strategy, if the regional difference degree between the second task area (simulation result) of its simulated spraying and the simulated second task area is less than or equal to the preset difference degree threshold, then supplementary spraying parameters are extracted according to the corresponding simulated spraying task execution strategy, otherwise, the simulated spraying task is re-determined; when there are multiple simulated spraying task execution strategies, then supplementary spraying parameters are extracted according to the simulated spraying task execution strategy with the smallest regional difference degree between the second task area (simulation result) of the simulated spraying and the simulated second task area and the regional difference degree being less than or equal to the preset difference degree threshold, otherwise, the simulated spraying task is re-determined; improving the suitability and stability of the output of the supplementary spraying parameters.

[0151] An embodiment of the present invention provides a valve electrostatic spraying system, as Figure 2 shown, including:

[0152] A sealing module 1 for sealing the valve passage with a tooling;

[0153] A surface treatment module 2 for performing surface treatment on the valve to be sprayed;

[0154] A spraying parameter determination module 3 for modulating the paint and determining the spraying parameters;

[0155] A spraying module 4 for performing electrostatic spraying on the valve according to the spraying parameters;

[0156] A curing module 5 for curing the paint after spraying is completed.

[0157] In one embodiment, the surface treatment module performs surface treatment on the valve to be sprayed, including:

[0158] Obtaining the valve material and the valve treatment requirements;

[0159] According to the valve material and the valve treatment requirements, determining the surface treatment method and performing corresponding treatment. The surface treatment methods include: degreasing, derusting, grinding, dust removal, and phosphating.

[0160] In one embodiment, the spraying parameter determination module modulates the coating material and determines the spraying parameters, including:

[0161] Obtain the spraying requirements;

[0162] According to the spraying requirements, determine the modulation ratio of the coating material, solvent and thinner of the required color, and uniformly modulate the coating material according to the modulation ratio;

[0163] According to the required spraying effect and the material, shape and size of the valve, determine the spraying parameters, and the spraying parameters include: air pressure, voltage, spraying distance and spray gun angle.

[0164] Preferably, the sealing module seals the valve passage with a tooling, including:

[0165] Obtain the valve type corresponding to the valve passage that needs to be sealed with tooling;

[0166] According to the valve type, dispatch the intelligent trolley to deliver the required tooling;

[0167] After the required tooling is delivered, install the tooling;

[0168] During the installation of the tooling, conduct the standardization detection and standardization reminder of the installation personnel;

[0169] After the installation of the tooling is completed, verify the sealing performance of the valve passage;

[0170] If the sealing performance verification of the valve passage passes, the tooling sealing of the valve passage is completed.

[0171] In one embodiment, the spraying module performs electrostatic spraying on the valve according to the spraying parameters, including:

[0172] Based on the machine vision detection technology, obtain the spraying process image during the spraying process;

[0173] According to the spraying process image, obtain the current spraying effect description of the valve;

[0174] Obtain the current expected spraying effect description;

[0175] If the difference between the current expected spraying effect description and the current spraying effect description is greater than or equal to the preset difference threshold, determine the differential spraying area;

[0176] Determine the remaining spraying area corresponding to the current unexecuted spraying parameters;

[0177] Determine the target spraying area according to the differential spraying area and the remaining spraying area;

[0178] Update the spraying parameters according to the target spraying area.

[0179] In one embodiment, the spraying module updates spraying parameters according to a target spraying area, including:

[0180] Simulate spraying according to the current unexecuted spraying parameters, and obtain the area to be sprayed that is ready for spraying each time of simulation;

[0181] Extract area relationship features from the target spraying area and the area to be sprayed, and obtain an area relationship feature set;

[0182] Determine local screening spraying parameters in the current unexecuted spraying parameters according to the area relationship feature set and the screening strategy library of the current unexecuted spraying parameters;

[0183] Determine the first task area of the local screening spraying parameters, and use the area other than the first task area in the target spraying area as the second task area;

[0184] Update the spraying parameters according to the current spraying device parameters, the second task area and the local screening spraying parameters.

[0185] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for electrostatic spraying of valves, characterized in that, Including: Step 1: Seal the valve passage with a jig. Step 2: Perform surface treatment on the valve to be sprayed. Step 3: Prepare the coating and determine the spraying parameters. Step 4: Perform electrostatic spraying on the valve according to the spraying parameters. Step 5: After spraying, cure the coating.

2. The electrostatic spraying method for a valve according to claim 1, characterized in that, Step 2: Perform surface treatment on the valve to be sprayed, including: Obtain the valve material and valve treatment requirements. According to the valve material and valve treatment requirements, determine the surface treatment method and perform corresponding treatment. The surface treatment methods include: degreasing, rust removal, grinding, dust removal, and phosphating.

3. The electrostatic spraying method for a valve according to claim 1, characterized in that, Step 3: Prepare the coating and determine the spraying parameters, including: Obtain the spraying requirements. According to the spraying requirements, determine the mixing ratio of the coating, solvent, and thinner of the required color, and uniformly prepare the coating according to the mixing ratio. According to the required spraying effect and the material, shape, and size of the valve, determine the spraying parameters. The spraying parameters include: air pressure, voltage, spraying distance, and spray gun angle.

4. The electrostatic spraying method for a valve according to claim 1, characterized in that, Step 4: Perform electrostatic spraying on the valve according to the spraying parameters, including: Based on machine vision detection technology, obtain the spraying process image during the spraying process. According to the spraying process image, obtain the description of the current spraying effect of the valve. Obtain the description of the current expected spraying effect. If the difference between the description of the current expected spraying effect and the description of the current spraying effect is greater than or equal to the preset difference threshold, determine the differentially sprayed area. Determine the remaining spraying area corresponding to the currently unexecuted spraying parameters. Determine the target spraying area according to the differentially sprayed area and the remaining spraying area. Update the spraying parameters according to the target spraying area.

5. The method for electrostatic spraying of a valve according to claim 4, characterized in that, Update the spraying parameters according to the target spraying area, including: Simulate spraying according to the currently unexecuted spraying parameters. Each time a simulation is performed, obtain the area to be sprayed that is about to be sprayed. Extract the regional relationship features of the target spraying area and the area to be sprayed, and obtain the regional relationship feature set. According to the regional relationship feature set and the screening strategy library of the currently unexecuted spraying parameters, determine the locally screened spraying parameters among the currently unexecuted spraying parameters. Determine the first task area of the locally screened spraying parameters, and use the area other than the first task area in the target spraying area as the second task area. Update the spraying parameters according to the current spraying equipment parameters, the second task area, and the locally screened spraying parameters.

6. The electrostatic spraying method for a valve according to claim 5, characterized in that, Update the spraying parameters according to the current spraying equipment parameters, the second task area, and the locally screened spraying parameters, including: Analyze the locally screened spraying parameters to determine the connection parameters between the first task area and the second task area. Design the supplementary spraying parameters for the second task area according to the current spraying equipment parameters and the connection parameters. Reorganize the currently unexecuted spraying parameters based on the supplementary spraying parameters and the locally screened spraying parameters to obtain the updated spraying parameters.

7. The electrostatic spraying method for a valve according to claim 6, characterized in that Design the supplementary spraying parameters for the second task area according to the current spraying equipment parameters and the connection parameters, including: Set up a spraying simulation model according to the device parameters of the spraying device. Obtain the relative position relationship between the spraying device and the second task area. Generate a simulated spraying task for the spraying simulation model according to the current spraying equipment parameters, the connection parameters, and the relative position relationship. Connect the spraying simulation model to the manual spraying AI model to obtain the execution strategy for the simulated spraying task. If the acquisition of the simulated spraying task execution strategy fails, narrow the first task area and re-determine the simulated spraying task; Acquire the simulated spraying task execution strategy according to the re-determined simulated spraying task until the acquisition is successful; If the simulation execution result of the simulated spraying task execution strategy meets the task expectation conditions, extract supplementary spraying parameters according to the corresponding simulated spraying task execution strategy; The task expectation conditions include: When the number of simulated spraying task execution strategies is 1, the regional difference degree between the simulation result and the simulated second task area is less than or equal to the preset difference degree threshold; When the number of simulated spraying task execution strategies is greater than 1, the regional difference degree between the simulation result and the simulated second task area is the smallest, and the smallest regional difference degree is less than or equal to the preset difference degree threshold.

8. A valve electrostatic spraying system, characterized in that, Including: A sealing module for sealing the valve passage with a tooling; A surface treatment module for surface-treating the valve to be sprayed; A spraying parameter determination module for modulating the paint and determining the spraying parameters; A spraying module for electrostatic spraying of the valve according to the spraying parameters; A curing module for curing the paint after spraying is completed.

9. The electrostatic spraying system for a valve according to claim 8, wherein, The surface treatment module surface-treats the valve to be sprayed, including: Obtain the valve material and the valve treatment requirements; According to the valve material and the valve treatment requirements, determine the surface treatment method and perform the corresponding treatment. The surface treatment methods include: degreasing, rust removal, grinding, dust removal, and phosphating.

10. A valve electrostatic spraying system as claimed in claim 8, wherein, The spraying parameter determination module modulates the paint and determines the spraying parameters, including: Obtain the spraying requirements; According to the spraying requirements, determine the modulation ratio of the paint, solvent, and thinner of the required color, and uniformly modulate the paint according to the modulation ratio; According to the required spraying effect and the material, shape, and size of the valve, determine the spraying parameters. The spraying parameters include: air pressure, voltage, spraying distance, and spray gun angle.

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