Intelligent paint conveying system and device

Abstract

The application relates to an intelligent paint conveying system and device, which comprises a first detection module for detecting the actual running frequency and running frequency of a paint conveying device; a second detection module for detecting the outlet pressure of paint at the output end of the paint conveying device and the backflow pressure of paint backflowing into the paint conveying device; a control module for adjusting the outlet pressure within a preset first pressure range and adjusting the backflow pressure within a preset second pressure range; an estimation module for obtaining an estimated running frequency according to the actual running frequency, running frequency and outlet pressure; and an alarm module for issuing an alarm when the estimated running frequency is higher than a preset frequency threshold. The application has the effect of conveniently setting different maintenance time intervals of the paint conveying device in different working environments.

Description

Technical Field

[0001] This application relates to the field of coating equipment, and in particular to an intelligent paint delivery system and apparatus. Background Technology

[0002] Automotive painting is one of the four major processes in automobile production. Paint, used in automotive painting, is a liquid mixture that is prone to settling. The paint needs to be maintained at a certain flow rate in the circulation pipeline to prevent settling and affecting the painting quality. Furthermore, the spraying pressure must be maintained during paint application.

[0003] In existing technology, paint is typically delivered into a circulation pipe inside the spray booth via a paint delivery device located in the paint mixing booth. The circulation pipe is connected to a spray gun, from which paint is sprayed for application. Simultaneously, any remaining paint in the circulation pipe returns to the paint delivery device for recirculation. This continuous circulation of paint between the pipe and the delivery device prevents sedimentation. The paint delivery system controls the pressure at which the delivery device delivers paint to ensure the correct spraying pressure.

[0004] Paint conveying systems experience aging and wear during the paint transport process, necessitating periodic maintenance. Due to the complex operating environment, the working condition of paint conveying systems is affected by various factors, such as conveying speed and pressure. Therefore, the maintenance intervals will vary depending on the operating conditions. However, traditional timed maintenance methods often fail to accurately reflect the actual condition of the paint conveying system, resulting in intervals that are either too short or too long. The former leads to unnecessary downtime and maintenance costs, while the latter may cause equipment failure, impacting production schedules and product quality. Summary of the Invention

[0005] To facilitate the setting of different maintenance intervals for the paint conveying device in different working environments, this application provides an intelligent paint conveying system and device.

[0006] This application provides an intelligent paint delivery system and device, which adopts the following technical solution:

[0007] An intelligent paint delivery system, the paint delivery system comprising:

[0008] The first detection module is used to detect the actual number of times the paint conveying device operates and its operating frequency.

[0009] The second detection module is used to detect the outlet pressure of the paint at the output end of the paint conveying device and the return pressure of the paint return conveying device.

[0010] The control module is used to adjust the outlet pressure within a preset first pressure range and also to adjust the return pressure within a preset second pressure range;

[0011] The estimation module is used to obtain an estimated number of operations based on the actual number of operations, operating frequency, and outlet pressure.

[0012] An alarm module is used to issue an alarm when the estimated number of operations exceeds a preset threshold.

[0013] By adopting the above technical solution, the estimation module calculates the estimated number of operations based on the collected data. The alarm module triggers an alarm when the number exceeds a preset threshold, reminding operators to perform timely maintenance to avoid malfunctions caused by equipment aging or wear, thereby improving production efficiency and safety. The estimated number of operations is generated by compensating for the actual number of operations with operating frequency and outlet pressure, thus facilitating the setting of different maintenance intervals for the paint conveying unit in different working environments.

[0014] During spray painting operations, without pressure control at both ends of the paint mixing booth's circulation pipeline, paint is sprayed from the spray guns connected to the pipeline, causing a pressure drop in the circulation pipeline. As the number of spray guns increases, the pressure drop in the circulation pipeline further increases. Adjusting the outlet and return pressures through the paint delivery system helps maintain a stable pressure for each spray gun.

[0015] Optionally, the estimation module pre-loads a frequency comparison table, a pressure comparison table, and a paint comparison table. The frequency comparison table contains frequency weight values ​​corresponding to different operating frequency ranges of the paint conveying device. The pressure comparison table contains pressure weight values ​​corresponding to different outlet pressure ranges of the paint conveying device. The paint comparison table contains characteristic factor values ​​for different paints conveyed by the paint conveying device. The estimation module obtains the estimated number of operations by including the following steps:

[0016] Obtain the paint type, average the operating frequency, and average the outlet pressure to obtain the average pressure.

[0017] The frequency weight is obtained according to the average frequency and the frequency comparison table; the pressure weight is obtained according to the average pressure and the pressure comparison table; and the characteristic factor is obtained according to the paint type and the paint comparison table.

[0018] The estimated number of operations is obtained by multiplying the frequency weight, pressure weight, characteristic factor, and actual number of operations.

[0019] By adopting the above technical solution, the wear and tear on the conveying device may vary depending on the type of paint. By incorporating the type of paint to compensate for the actual number of operations, the accuracy of setting maintenance intervals for paint conveying devices in different environments can be improved.

[0020] Optionally, after the control module adjusts the backflow pressure to a preset second pressure range, the following steps are further included:

[0021] Obtain the pressure adjustment range, which is the adjustment ratio of the return pressure;

[0022] Determine whether the pressure adjustment range is less than a preset pressure adjustment threshold; if yes, adjust the outlet pressure to a preset third pressure range and stop adjusting the return pressure, wherein the third pressure range is less than the first pressure range; if no, continue to adjust the outlet pressure to a preset first pressure range and the return pressure to a preset second pressure range.

[0023] After adjusting the outlet pressure to the preset third pressure range and stopping the adjustment of the return pressure, the pressure difference is obtained based on the outlet pressure and the return pressure.

[0024] Determine whether the pressure difference is less than a preset pressure difference threshold; if yes, return to obtain the pressure difference based on the difference between the outlet pressure and the return pressure; if no, the control module readjusts the outlet pressure within a preset first pressure range and adjusts the return pressure within a preset second pressure range.

[0025] By adopting the above technical solution, the larger the pressure adjustment range, the more spray guns are in use. When the pressure adjustment range is lower than the pressure adjustment threshold, there are no spray guns in use, and the paint delivery system controls the outlet pressure of the paint delivery device within the third pressure range, thereby putting the paint delivery device into standby mode and achieving energy saving.

[0026] An intelligent paint delivery device includes a circulating mixing tank, a support frame, and an electric pump. A controller, a return pipe, and a discharge pipe are fixedly mounted on the support frame. The inlet end of the electric pump is connected to the circulating mixing tank, and the outlet end of the electric pump is connected to one end of the discharge pipe. The end of the discharge pipe away from the electric pump is used to connect to the inlet end of a paint spraying pipeline. One end of the return pipe is connected to the circulating mixing tank, and the end of the return pipe away from the circulating mixing tank is used to connect to the outlet end of the paint spraying pipeline. A back pressure valve is fixedly mounted on the return pipe. A first detection module, a control module, an estimation module, and an alarm module are integrated into the controller. The second detection module includes a first pressure sensor and a second pressure sensor. The first pressure sensor is fixedly mounted on the outlet end of the electric pump, and the second pressure sensor is fixedly mounted on the return pipe. The second pressure sensor is located on the side of the back pressure valve away from the circulating mixing tank.

[0027] By adopting the above technical solution, the circulating mixing tank agitates the returned paint, thereby reducing the occurrence of paint sedimentation inside the circulating mixing tank.

[0028] Optionally, both the return pipe and the discharge pipe are equipped with filters. The filter in the return pipe is located on the side of the second pressure sensor away from the pressure valve. The filter includes a head, an outer cover, and a filter cylinder. Both the outer cover and the filter cylinder are detachably installed on the head. The end of the filter cylinder away from the head is sealed off. The filter cylinder is located inside the outer cover. The discharge end of the head is connected to the interior of the filter cylinder, and the feed end of the head is connected to the space between the filter cylinder and the outer cover.

[0029] By adopting the above technical solution, when the paint flows inside the return pipe and the discharge pipe, the paint first enters the space between the filter cartridge and the outer cover from the feed end of the machine head, and then the paint is discharged from the discharge end of the machine head after being filtered by the filter cartridge, thereby facilitating the filtration of impurities in the paint and improving the spraying effect.

[0030] Optionally, the filter cartridge is provided with a rotating rod and a cleaning cover inside. A first connecting rod is fixedly installed between the cleaning cover and the rotating rod. The rotating rod is coaxial with the filter cartridge. The opening of the cleaning cover is away from the rotating rod and faces the inner wall of the filter cartridge. A first separating membrane is fixedly installed on the inner wall of the cleaning cover. A rotating mechanism is installed between the filter cartridge and the rotating rod. The rotating mechanism is used to drive the rotating rod to rotate.

[0031] By employing the above technical solution, pressure changes in the paint conveying device cause pressure changes in the first separating membrane, resulting in the membrane moving back and forth and allowing paint to enter or exit the cleaning hood. When paint exits from the cleaning hood, it flushes the filter cartridge, reducing the likelihood of filter cartridge clogging. A rotating mechanism drives a rotating rod, which in turn rotates the cleaning hood, facilitating its movement to different positions on the filter cartridge for cleaning.

[0032] Optionally, the rotating mechanism includes a lifting assembly and a guiding assembly, both of which are installed between the filter cylinder and the rotating rod. The lifting assembly is used to drive the rotating rod to rise and fall, and the guiding assembly is used to guide the rotation when the rotating rod rises and falls.

[0033] By adopting the above technical solution, the lifting component drives the rotating rod to rise and fall, and the guide component converts the rising and falling of the rotating rod into rotation, thereby facilitating the rotation of the rotating rod.

[0034] Optionally, the lifting assembly includes a shield, an elastic membrane, a support block, and an elastic element. The shield is fixedly connected to the end of the filter cartridge away from the machine head. The elastic membrane is fixedly connected along the periphery of the support block. The outer periphery of the elastic membrane is fixedly connected to the inner periphery of the shield. The elastic element is fixedly installed on the inner wall of the support block and the shield. The elastic element is used to drive the support block to move towards the machine head. The end of the rotating rod away from the machine head is rotatably installed on the support block.

[0035] By adopting the above technical solution, when the pressure of the paint inside the filter cartridge increases, the paint squeezes the support block away from the machine head and moves it away from the machine head. The support block drives the rotating rod to descend. When the pressure of the paint inside the filter cartridge decreases, the elastic element drives the support block to move closer to the machine head. The support block drives the rotating rod to rise, thus facilitating the lifting and lowering of the rotating rod.

[0036] Optionally, the guide assembly includes a second connecting rod, a slide rod, a guide ring, and a guide block. The guide ring is located inside the filter cartridge near the head end. The second connecting rod is fixedly installed between the outer wall of the guide ring and the inner wall of the filter cartridge. The guide ring has a guide groove, which is repeatedly bent along the circumference of the guide ring. One end of the slide rod is fixedly connected to the first connecting rod, and the other end of the slide rod slides through the guide groove. There are multiple guide blocks, and the guide blocks are fixedly installed on the inner wall at the bend position of the guide groove.

[0037] By adopting the above technical solution, during the lifting and lowering of the rotating rod, the slide bar slides in the guide groove, and at the same time guides the first connecting rod through the guide block, so that the rotating rod slides in one direction in the guide groove, thereby facilitating the rotation of the rotating rod.

[0038] Optionally, a push plate is provided inside the cleaning hood for lifting and sliding. The push plate is located on the side of the first separating membrane near the rotating rod. Multiple first toothed blocks are fixedly installed on the side of the push plate away from the first separating membrane. Multiple second toothed blocks are fixedly installed on the inner wall of the cleaning hood near the rotating rod. The first and second toothed blocks cooperate with each other to drive the push plate to squeeze the first separating membrane. A drive rod is fixedly installed at the top of the push plate. A clearance opening is provided on the top side of the cleaning hood for the drive rod to pass through. A second separating membrane is fixedly installed inside the clearance opening. The drive rod is fixedly inserted through the second separating membrane.

[0039] By adopting the above technical solution, when the rotating rod rises and falls, it drives the cleaning hood to rise and fall together via the first connecting rod. When the cleaning hood rises, the drive rod squeezes the machine head, and the push plate moves relative to the cleaning hood, causing the first and second toothed blocks to squeeze against each other, and the push plate moves away from the rotating rod. As the push plate moves away from the rotating rod, it pushes the first separating membrane, thereby increasing the amount of paint discharged from inside the cleaning hood. When the cleaning hood falls, the paint squeezes the first and second separating membranes, causing the push plate to move towards the rotating rod, and the paint flows back into the cleaning hood.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. The estimated number of operations is obtained by compensating the actual number of operations by the operating frequency and outlet pressure, which makes it easier to set different maintenance intervals for the paint conveying device in different working environments and reduce the impact of excessively long or short maintenance intervals.

[0042] 2. By installing the die head in the return pipe and discharge pipe, the filter cartridge filters the paint as it flows through the die head, thereby improving the spraying effect;

[0043] 3. The first separator membrane moves back and forth according to the pressure change of the paint inside the filter cartridge, so that the paint is repeatedly discharged from and enters the cleaning hood. When the paint is discharged from the cleaning hood, the paint washes the filter cartridge, thereby reducing the occurrence of filter cartridge clogging. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of Embodiment 1 of this application;

[0045] Figure 2 This is a flowchart of steps S101-S103 in Embodiment 1 of this application;

[0046] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0047] Figure 4 yes Figure 3 Enlarged view at point A;

[0048] Figure 5 This is a flowchart of steps S201-S207 in Embodiment 2 of this application;

[0049] Figure 6 This is a schematic diagram of the filter structure of Embodiment 2 of this application;

[0050] Figure 7 This is a radial cross-sectional view of the filter in Embodiment 2 of this application;

[0051] Figure 8 yes Figure 7 Enlarged view at point B;

[0052] Figure 9 yes Figure 7 Enlarged view at point C.

[0053] Explanation of reference numerals in the attached diagram: 1. First detection module; 2. Second detection module; 3. Control module; 4. Estimation module; 5. Alarm module; 6. Communication module; 7. Raw material mixing tank; 8. Circulating mixing tank; 9. Support frame; 10. Electric pump; 11. Feed pump; 12. Controller; 13. Return pipe; 14. Discharge pipe; 15. Filter; 151. Machine head; 152. Outer cover; 153. Filter cartridge; 16. Back pressure valve; 17. Rotating rod; 18. Cleaning cover; 19. First connecting rod; 20. 21. First separating membrane; 22. Rotating mechanism; 211. Lifting assembly; 2111. Shielding cover; 2112. Elastic membrane; 2113. Support block; 2114. Elastic element; 212. Guide assembly; 2121. Second connecting rod; 2122. Slide rod; 2123. Guide ring; 2124. Guide block; 22. Circular plate; 23. Limiting rod; 24. Guide groove; 25. Push plate; 26. First toothed block; 27. Second toothed block; 28. Clearance opening; 29. ​​Second separating membrane; 30. Drive rod. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0055] Example 1.

[0056] This application discloses an intelligent paint delivery system and device.

[0057] Reference Figure 1 An intelligent paint delivery system includes a first detection module 1, a second detection module 2, a control module 3, an estimation module 4, and an alarm module 5.

[0058] The first detection module 1 is used to detect the actual number of operations and operating frequency of the paint conveying device. The second detection module 2 is used to detect the outlet pressure of the paint at the output end of the paint conveying device and the return pressure of the paint return conveying device.

[0059] Control module 3 has preset first and second pressure ranges. It adjusts the outlet pressure to fall within the first pressure range and the return pressure to fall within the second pressure range. During painting, the pressure emitted by the spray gun will fall between the outlet and return pressures. By controlling the outlet and return pressures, the stability of the painting pressure is improved.

[0060] The estimation module 4 has pre-entered a frequency comparison table, a pressure comparison table, and a paint comparison table. The frequency comparison table contains the frequency weight values ​​corresponding to different operating frequency ranges of the paint conveying device. The pressure comparison table contains the pressure weight values ​​corresponding to different outlet pressure ranges of the paint conveying device. The paint comparison table contains the characteristic factor values ​​of the paint conveying device for conveying different paints.

[0061] Reference Figure 1 , Figure 2 The estimation module 4 is used to obtain the estimated number of operations based on the actual number of operations, operating frequency, and outlet pressure. Specifically, it includes the following steps:

[0062] S101. Obtain the paint type, average the operating frequency, and average the outlet pressure to obtain the average frequency. Then proceed to step S102.

[0063] S102. Obtain the frequency weight based on the average frequency and the frequency comparison table, obtain the pressure weight based on the average pressure and the pressure comparison table, and obtain the characteristic factor based on the paint type and the paint comparison table. Then proceed to step S103.

[0064] Estimation module 4 retrieves the frequency lookup table and selects the frequency weight based on the frequency range of the average frequency. Estimation module 4 also retrieves the pressure lookup table and selects the pressure weight based on the pressure range of the average pressure, thus obtaining the pressure weight. The operator manually inputs the type of paint being conveyed by the paint conveying device into estimation module 4. Estimation module 4 then searches the paint lookup table based on the paint type to obtain the characteristic factor.

[0065] S103. Obtain the estimated number of operations by multiplying the frequency weight, pressure weight, characteristic factor, and actual number of operations.

[0066] Paint conveying devices require maintenance after a certain number of operations or a certain period of use. In this application, the number of operations is used to determine whether maintenance is needed. While maintenance is required after a certain number of operations, different frequencies, pressures, and types of paint cause varying degrees of wear. The estimated number of operations is calculated by compensating for the actual number of operations using frequency weighting, pressure weighting, and characteristic factors. This allows for setting different maintenance intervals for the paint conveying device in different working environments.

[0067] The alarm module 5 has a preset number of times threshold. When the estimated number of operations exceeds the number of times threshold, the alarm module 5 will issue an alarm to remind the staff to inspect and maintain the paint conveying device.

[0068] In this application, a communication module 6 is also provided, which uploads the alarm issued by the alarm module 5 and the data detected by the first detection module 1 and the second detection module 2, so as to facilitate remote viewing.

[0069] Reference Figure 3 , Figure 4An intelligent paint conveying device, using an intelligent paint conveying system according to this embodiment, includes a raw material mixing tank 7, a circulating mixing tank 8, a support frame 9, and an electric pump 10. A feeding pump 11 is fixedly installed on the top side of the raw material mixing tank 7. The inlet end of the feeding pump 11 is connected to the raw material mixing tank 7, and the outlet end of the feeding pump 11 is connected to the circulating mixing tank 8. Paint mixing takes place in the raw material mixing tank 7. After the materials are added to the raw material mixing tank 7 and mixed, paint is formed. The feeding pump 11 then delivers the paint into the circulating mixing tank 8.

[0070] Both the circulating mixing tank 8 and the raw material mixing tank 7 are equipped with level sensors, and a controller 12 is fixedly installed on the support frame 9. The level sensors send the detected level to the controller 12. The controller 12 uploads the level of the circulating mixing tank 8 and the raw material mixing tank 7 to the operator's mobile terminal, so that the operator can easily understand the level of the circulating mixing tank 8 and the raw material mixing tank 7.

[0071] A return pipe 13 and a discharge pipe 14 are also fixedly installed on the support frame 9. The inlet end of the electric pump 10 is connected to the circulating mixing tank 8, and the outlet end of the electric pump 10 is connected to one end of the discharge pipe 14. The other end of the discharge pipe 14 is connected to the inlet end of the paint booth circulation pipeline, thus facilitating the supply of paint to the paint booth.

[0072] One end of the return pipe 13 is connected to the outlet end of the spray booth's circulation pipeline, and the other end of the return pipe 13 is fixedly connected to the circulating mixing tank 8. The paint in the spray booth flows from the return pipe 13 into the circulating mixing tank 8. The paint circulates between the paint mixing chamber and the spray booth, and the circulating mixing tank 8 also agitates the paint, thereby reducing the occurrence of paint sedimentation.

[0073] Both the return pipe 13 and the discharge pipe 14 are fixedly equipped with filters 15. In this embodiment, the filter 15 on the return pipe 13 is a bag filter, while the other filters 15 are cartridge filters. A filter 15 is also installed between the feed pump 11 and the circulating mixing tank 8. The filters 15 are used to filter impurities in the paint, thereby improving the spraying effect. A back pressure valve 16 is also fixedly installed on the return pipe 13, and the back pressure valve 16 is located on the side of the filter 15 closer to the circulating mixing tank 8.

[0074] The first detection module 1, estimation module 4, alarm module 5, and control module 3 are integrated into the controller 12. The second detection module 2 includes a first pressure sensor and a second pressure sensor. The first pressure sensor is fixedly installed at the discharge end of the electric pump 10 to detect the outlet pressure, and the second pressure sensor is fixedly installed on the return pipe 13 to detect the return pressure. The second pressure sensor is located on the side of the back pressure valve 16 away from the circulating mixing tank 8. The controller 12 controls the return pressure through the back pressure valve 16. The controller 12 controls the outlet pressure through the electric pump 10. The controller 12 adjusts the outlet pressure by changing the voltage, current, or frequency of the electric pump 10. In this embodiment, the controller 12 adjusts the outlet pressure by changing the frequency of the electric pump 10.

[0075] When the electric pump 10 is running, the motor inside the electric pump 10 will rotate, thereby causing the electric pump 10 to transport paint. The actual number of operations is the number of times the motor rotates.

[0076] The paint mixing booth's circulation pipeline is also equipped with a flow rate sensor, which detects the paint flow rate in the circulation pipeline and sends the data to the controller 12. The controller 12 then transmits the data via the communication module 6, allowing staff to easily monitor the paint flow rate.

[0077] The implementation principle of the intelligent paint conveying system and device in this application embodiment is as follows: The maintenance interval of the paint conveying device varies under different working environments. Factors affecting the maintenance interval generally include outlet pressure, operating frequency, and paint type. Average frequency and average pressure are obtained by calculating the average values ​​of the operating frequency and outlet pressure respectively. Then, based on the operating frequency range where the average frequency falls, the frequency weight is found from a frequency lookup table, and based on the outlet pressure range where the average pressure falls, the pressure weight is found from a pressure lookup table. Simultaneously, the operator enters the type of paint conveyed by the paint conveying device into the paint conveying system and finds characteristic factors from a paint lookup table based on the paint type.

[0078] The estimated number of operations is then obtained by multiplying the frequency weight, pressure weight, characteristic factor, and actual number of operations. The estimated number of operations is compensated for by the frequency weight, pressure weight, and characteristic factor, which facilitates setting different maintenance intervals for the paint conveying device in different working environments.

[0079] In this application, the detection data such as the actual number of operations, operating frequency, outlet pressure, return pressure, and paint flow rate are uploaded through the communication module 6, so that staff can determine whether the paint conveying device has malfunctioned based on the detection data.

[0080] Example 2.

[0081] This application discloses an intelligent paint delivery system and device.

[0082] Reference Figure 5 The difference between the intelligent paint supply system of this application embodiment and Embodiment 1 is that, after the control module 3 adjusts the return pressure to a preset second pressure range, the system further includes the following steps:

[0083] S201. Obtain the voltage regulation amplitude. Then proceed to step S202.

[0084] Control module 3 controls the return pressure through back pressure valve 16, which typically regulates pressure by charging and discharging air. The pressure adjustment range is obtained by measuring the change in air pressure before and after charging back pressure valve 16. In another embodiment, the air pressure of the air charged by back pressure valve 16 can also be used directly to determine the pressure adjustment range.

[0085] S202. Determine whether the voltage regulation amplitude is less than the preset voltage regulation threshold; if yes, proceed to step S203; if no, proceed to step S204.

[0086] When the paint conveyed by the paint delivery device flows back through the circulation pipeline, the pressure drop at the outlet, forming the backflow pressure, is mainly affected by the resistance of the circulation pipeline and the number of spray guns in operation. The pressure adjustment threshold value falls between the pressure adjustment ranges of the two back pressure valves 16 when all spray guns are stopped and when only one spray gun is operating. By comparing the pressure adjustment range with the pressure adjustment threshold, it is easy to determine whether painting operations are in progress.

[0087] S203. Adjust the outlet pressure to the preset third pressure range and stop adjusting the return pressure. Then proceed to step S205.

[0088] The third pressure range is lower than the first pressure range. When the pressure adjustment is less than the adjustment threshold, no spray gun is operating. When the outlet pressure falls within the third pressure range, the paint delivery system's flow rate helps prevent paint sedimentation, thus reducing energy consumption.

[0089] In another embodiment, step S203 is executed after the voltage regulation amplitude is less than a preset voltage regulation threshold for a certain period of time.

[0090] S204. Continue to adjust the outlet pressure to within the preset first pressure range and the return pressure to within the preset second pressure range.

[0091] The pressure adjustment range exceeds the pressure adjustment threshold, indicating that a spray gun is in operation. The outlet pressure is kept within the first pressure range, and the return pressure within the second pressure range, thus facilitating the improvement of pressure stability when the spray gun dispenses paint.

[0092] S205. Obtain the pressure difference based on the outlet pressure and the return pressure. Then proceed to step S206.

[0093] Control module 3 obtains the pressure difference based on the difference between the outlet pressure and the return pressure.

[0094] S206. Determine whether the pressure difference is less than the preset pressure difference threshold; if yes, return to step S205; if no, proceed to step S207.

[0095] S207, Control module 3 readjusts the outlet pressure within the preset first pressure range and adjusts the return pressure within the preset second pressure range.

[0096] When no spray gun is used for painting, the pressure difference between the outlet pressure and the return pressure is small, so step S205 continues to execute, waiting for a spray gun to be used for painting. After a spray gun is used for painting, the pressure difference increases, and the control module 3 readjusts the outlet pressure to a preset first pressure range and the return pressure to a preset second pressure range, so that the paint pressure sprayed by the spray gun meets the requirements.

[0097] Reference Figure 6 , Figure 7 The intelligent paint conveying device of this application differs from that of Embodiment 1 in that the filter 15 includes a head 151, an outer cover 152, and a filter cartridge 153. Both the outer cover 152 and the filter cartridge 153 are detachably installed on the head 151, with the filter cartridge 153 located inside the outer cover 152. In this application, the outer cover 152 and the filter cartridge 153 are threaded into the head 151 and sealed by O-rings, thereby enabling the outer cover 152 and the filter cartridge 153 to be detachably installed on the head 151.

[0098] The die head 151 has a feed end and a discharge end. The discharge end of the die head 151 is connected to the interior of the filter cylinder 153, and the feed end of the die head 151 is connected to the space between the filter cylinder 153 and the outer cover 152. Paint enters the space between the filter cylinder 153 and the outer cover 152 from the feed end of the die head 151, and then flows into the interior of the filter cylinder 153. The paint inside the filter cylinder 153 is then discharged from the discharge end of the die head 151.

[0099] Reference Figure 7 , Figure 8 The filter cartridge 153 is equipped with a rotating rod 17 and a cleaning cover 18. The rotating rod 17 is coaxially arranged with the filter cartridge 153. A first connecting rod 19 is fixedly installed between the rotating rod 17 and the cleaning cover 18. The opening of the cleaning cover 18 is away from the rotating rod 17 and faces the inner wall of the filter cartridge 153. A first separator membrane 20 is fixedly installed inside the cleaning cover 18.

[0100] When the control module 3 controls the outlet pressure within the first pressure range, the first separator membrane 20 experiences high pressure from the paint, causing it to move towards the rotating rod 17 and allowing the paint to enter the cleaning hood 18. When the control module 3 controls the outlet pressure within the third pressure range, the first separator membrane 20 experiences low pressure from the paint, causing it to move away from the rotating rod 17 and allowing the paint inside the cleaning hood 18 to be discharged. As the paint is discharged from the cleaning hood 18, it washes over the filter cartridge 153, thus delaying clogging of the filter cartridge 153.

[0101] Reference Figure 8 , Figure 9 The filter cartridge 153 is equipped with a rotating mechanism 21, which includes a lifting assembly 211 and a guide assembly 212. The lifting assembly 211 includes a shield 2111, an elastic membrane 2112, a support block 2113, and an elastic element 2114. The shield 2111 is fixedly connected to the end of the filter cartridge 153 away from the machine head 151, thereby sealing the end of the filter cartridge 153 away from the machine head 151. The elastic membrane 2112 is fixedly connected along the periphery of the support block 2113, and the outer periphery of the elastic membrane 2112 is fixedly connected to the inner peripheral wall of the shield 2111. The elastic element 2114 is fixedly installed on the inner wall of the support block 2113 and the shield 2111, and the elastic element 2114 is used to drive the support block 2113 to move towards the machine head 151. In this embodiment, the elastic element 2114 is a spring.

[0102] When the control module 3 controls the outlet pressure within the first pressure range, the support block 2113 experiences high pressure from the paint, causing it to compress the spring and descend away from the machine head 151. When the control module 3 controls the outlet pressure within the third pressure range, the support block 2113 experiences low pressure from the paint, and the spring recovers its deformation, causing the support block 2113 to rise closer to the machine head 151.

[0103] A circular plate 22 is fixedly installed at the end of the rotating rod 17 away from the machine head 151. A limit rod 23 is fixedly installed on the side of the support block 2113 near the machine head 151. The limit rod 23 is L-shaped and abuts against the side of the circular plate 22 near the machine head 151, thereby allowing the rotating rod 17 to rotate and be mounted on the support block 2113. When the support block 2113 rises and falls, the support block 2113 will drive the rotating rod 17 to rise and fall together.

[0104] Reference Figure 8 , Figure 9The guide assembly 212 includes a second connecting rod 2121, a slide rod 2122, a guide ring 2123, and guide blocks 2124. The guide ring 2123 is located inside the filter cartridge 153 near the head 151. The second connecting rod 2121 is fixedly installed between the outer wall of the guide ring 2123 and the inner wall of the filter cartridge 153. The inner wall of the guide ring 2123 has a guide groove 24, which is repeatedly bent along the circumference of the guide ring 2123. One end of the slide rod 2122 is fixedly connected to the first connecting rod 19, and the slide rod 2122 is bent so that the other end slides through the guide groove 24. There are multiple guide blocks 2124, which are fixedly installed on the inner wall of the bent position of the guide groove 24.

[0105] When the support block 2113 drives the rotating rod 17 to rise and fall, the rotating rod 17 drives the sliding rod 2122 to rise and fall via the first connecting rod 19. The sliding rod 2122 slides within the guide groove 24 during its rise and fall. The cooperation between the sliding rod 2122 and the guide groove 24 facilitates the rotation of the rotating rod 17. The rotation of the rotating rod 17 facilitates the movement of the cleaning cover 18 to different positions on the filter cartridge 153 for cleaning. The guide block 2124 guides the sliding rod 2122 to move in one direction within the guide groove 24.

[0106] Reference Figure 8 , Figure 9 Inside the cleaning cover 18, a push plate 25 is installed, which slides and rises. The push plate 25 is located on the side of the first separating membrane 20 near the rotating rod 17. Multiple first toothed blocks 26 are fixedly installed on the side of the push plate 25 away from the first separating membrane 20, and multiple second toothed blocks 27 are fixedly installed on the inner wall of the cleaning cover 18 near the rotating rod 17. Both the first toothed blocks 26 and the second toothed blocks 27 are hemispherical, and they cooperate to drive the push plate 25 to squeeze the first separating membrane 20. A drive rod 30 is fixedly installed at the top of the push plate 25, and a clearance opening 28 is provided on the top side of the cleaning cover 18 for the drive rod 30 to pass through. A second separating membrane 29 is fixedly installed inside the clearance opening 28, and the drive rod 30 is fixedly inserted through the second separating membrane 29.

[0107] As the rotating rod 17 drives the cleaning hood 18 to rise, the top of the drive rod 30 presses against the machine head 151, thus stopping the push plate 25 from rising. Then, as the rotating rod 17 continues to drive the cleaning hood 18 to rise, the first toothed block 26 and the second toothed block 27 press against each other, causing the push plate 25 to move away from the rotating rod 17. The push plate 25 then moves the first separating membrane 20 away from the rotating rod 17. By pushing the first separating membrane 20 away from the rotating rod 17, the amount of paint discharged from the cleaning hood 18 is increased, thereby improving the cleaning effect on the filter cartridge 153.

[0108] When the rotating rod 17 drives the cleaning cover 18 to descend, the drive rod 30 separates from the machine head 151, and the first separating membrane 20 and the second separating membrane 29 are reset by the pressure of the paint, thereby causing the first tooth block 26 and the second tooth block 27 to be misaligned again.

[0109] The top of the drive rod 30 is spherical. When the rotating rod 17 drives the cleaning cover 18 to rotate, if the top of the drive rod 30 is pressed against the second connecting rod 2121, the drive rod 30 will move downward, thus making it easier for the drive rod 30 to avoid the second connecting rod 2121.

[0110] The implementation principle of the intelligent paint delivery system and device in this application embodiment is as follows: due to the pressure change inside the filter 15, the first separator 20 deforms and discharges the paint inside the cleaning cover 18. When the paint is discharged from the cleaning cover 18, it flushes the holes of the filter cartridge 153, thereby delaying the clogging of the filter cartridge 153.

[0111] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intelligent paint supply system, characterized in that, The paint conveying system includes: a first detection module (1) for detecting the actual number of times the paint conveying device operates and the operating frequency; a second detection module (2) for detecting the outlet pressure of the paint at the output end of the paint conveying device and the return pressure of the paint return conveying device; a control module (3) for adjusting the outlet pressure within a preset first pressure range and for adjusting the return pressure within a preset second pressure range; an estimation module (4) for obtaining an estimated number of operations based on the actual number of operations, the operating frequency, and the outlet pressure; and an alarm module (5) for issuing an alarm when the estimated number of operations exceeds a preset threshold. The estimation module (4) has a frequency comparison table, a pressure comparison table, and a paint comparison table pre-loaded. The frequency comparison table contains the frequency weight values ​​corresponding to different operating frequency ranges of the paint conveying device. The pressure comparison table contains the pressure weight values ​​corresponding to different outlet pressure ranges of the paint conveying device. The paint comparison table contains the characteristic factor values ​​of different paints conveyed by the paint conveying device. The estimation module (4) obtains the estimated number of operations by the following steps: obtaining the paint type, and taking the average value of the operating frequency to obtain the average frequency, and taking the average value of the outlet pressure to obtain the average pressure; obtaining the frequency weight according to the average frequency and the frequency comparison table, obtaining the pressure weight according to the average pressure and the pressure comparison table, and obtaining the characteristic factor according to the paint type and the paint comparison table; and obtaining the estimated number of operations by multiplying the frequency weight, pressure weight, characteristic factor, and actual number of operations.

2. The intelligent paint supply system according to claim 1, characterized in that: After the control module (3) adjusts the reflux pressure to a preset second pressure range, the following steps are further included: obtaining the pressure adjustment amplitude, which is the adjustment ratio of the reflux pressure; determining whether the pressure adjustment amplitude is less than a preset pressure adjustment threshold; if yes, adjusting the outlet pressure to a preset third pressure range and stopping the adjustment of the reflux pressure, the third pressure range being less than the first pressure range; if no, continuing to adjust the outlet pressure to a preset first pressure range and the reflux pressure to a preset second pressure range; after adjusting the outlet pressure to a preset third pressure range and stopping the adjustment of the reflux pressure, obtaining the pressure difference based on the outlet pressure and the reflux pressure; determining whether the pressure difference is less than a preset pressure difference threshold; if yes, returning to obtaining the pressure difference based on the difference between the outlet pressure and the reflux pressure; if no, the control module (3) readjusts the outlet pressure to a preset first pressure range and adjusts the reflux pressure to a preset second pressure range.

3. An intelligent paint supply device, using the intelligent paint supply system as described in claim 2, characterized in that: The system includes a circulating mixing tank (8), a support frame (9), and an electric pump (10). A controller (12), a return pipe (13), and a discharge pipe (14) are fixedly mounted on the support frame (9). The inlet end of the electric pump (10) is connected to the circulating mixing tank (8), and the outlet end of the electric pump (10) is connected to one end of the discharge pipe (14). The end of the discharge pipe (14) away from the electric pump (10) is used to connect to the inlet end of the paint spraying pipeline. One end of the return pipe (13) is connected to the circulating mixing tank (8), and the return pipe (13) is located away from the circulating mixing tank (8). One end is used to connect to the discharge end of the paint spraying pipeline. The back pressure valve (16) is fixedly installed on the return pipe (13). The first detection module (1), control module (3), estimation module (4) and alarm module (5) are integrated in the controller (12). The second detection module (2) includes a first pressure sensor and a second pressure sensor. The first pressure sensor is fixedly installed on the discharge end of the electric pump (10). The second pressure sensor is fixedly installed on the return pipe (13). The second pressure sensor is located on the side of the back pressure valve (16) away from the circulating mixing tank (8).

4. The intelligent paint supply device according to claim 3, characterized in that: Both the return pipe (13) and the discharge pipe (14) are equipped with filters (15). The filter (15) of the return pipe (13) is located on the side of the second pressure sensor away from the pressure valve. The filter (15) includes a head (151), an outer cover (152) and a filter cylinder (153). The outer cover (152) and the filter cylinder (153) can be detachably installed on the head (151). The end of the filter cylinder (153) away from the head (151) is sealed. The filter cylinder (153) is located inside the outer cover (152). The discharge end of the head (151) is connected to the inside of the filter cylinder (153). The feed end of the head (151) is connected to the space between the filter cylinder (153) and the outer cover (152).

5. The intelligent paint supply device according to claim 4, characterized in that: The filter cylinder (153) is provided with a rotating rod (17) and a cleaning cover (18). A first connecting rod (19) is fixedly installed between the cleaning cover (18) and the rotating rod (17). The rotating rod (17) is coaxially arranged with the filter cylinder (153). The opening of the cleaning cover (18) is away from the rotating rod (17) and faces the inner wall of the filter cylinder (153). A first separating membrane (20) is fixedly installed on the inner wall of the cleaning cover (18). A rotating mechanism (21) is installed between the filter cylinder (153) and the rotating rod (17). The rotating mechanism (21) is used to drive the rotating rod (17) to rotate.

6. The intelligent paint supply device according to claim 5, characterized in that: The rotating mechanism (21) includes a lifting assembly (211) and a guide assembly (212). The lifting assembly (211) and the guide assembly (212) are both installed between the filter cylinder (153) and the rotating rod (17). The lifting assembly (211) is used to drive the rotating rod (17) to rise and fall, and the guide assembly (212) is used to guide the rotation when the rotating rod (17) rises and falls.

7. The intelligent paint supply device according to claim 6, characterized in that: The lifting assembly (211) includes a shield (2111), an elastic membrane (2112), a support block (2113), and an elastic element (2114). The shield (2111) is fixedly connected to the end of the filter cartridge (153) away from the machine head (151). The elastic membrane (2112) is fixedly connected along the periphery of the support block (2113). The outer periphery of the elastic membrane (2112) is fixedly connected to the inner periphery of the shield (2111). The elastic element (2114) is fixedly installed on the inner wall of the support block (2113) and the shield (2111). The elastic element (2114) is used to drive the support block (2113) to move towards the machine head (151). The end of the rotating rod (17) away from the machine head (151) is rotatably installed on the support block (2113).

8. The intelligent paint supply device according to claim 6, characterized in that: The guide assembly (212) includes a second connecting rod (2121), a slide rod (2122), a guide ring (2123), and a guide block (2124). The guide ring (2123) is located inside the filter cylinder (153) near the head (151). The second connecting rod (2121) is fixedly installed between the outer wall of the guide ring (2123) and the inner wall of the filter cylinder (153). The guide ring (2123) has a guide groove (24). The guide groove (24) is repeatedly bent along the circumference of the guide ring (2123). One end of the slide rod (2122) is fixedly connected to the first connecting rod (19). The other end of the slide rod (2122) slides through the guide groove (24). There are multiple guide blocks (2124). The guide blocks (2124) are fixedly installed on the inner wall of the bend position of the guide groove (24).

9. The intelligent paint supply device according to claim 7, characterized in that: The cleaning cover (18) is equipped with a push plate (25) that slides up and down inside. The push plate (25) is located on the side of the first separator (20) near the rotating rod (17). Multiple first tooth blocks (26) are fixedly installed on the side of the push plate (25) away from the first separator (20). Multiple second tooth blocks (27) are fixedly installed on the inner wall of the cleaning cover (18) near the rotating rod (17). The first tooth blocks (26) and the second tooth blocks (27) cooperate with each other to drive the push plate (25) to squeeze the first separator (20). A drive rod (30) is fixedly installed at the top of the push plate (25). A clearance opening (28) is opened on the top side of the cleaning cover (18) for the drive rod (30) to pass through. A second separator (29) is fixedly installed inside the clearance opening (28). The drive rod (30) is fixedly inserted through the second separator (29).

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