Intelligent paint conveying system and device

Abstract

The invention relates to an intelligent paint conveying system and device, and the system comprises a first detection module which is used for detecting the actual operation frequency and operation frequency of the paint conveying device; the second detection module is used for detecting the outlet pressure of the paint at the output end of the paint conveying device and the backflow pressure of the paint flowing back to the paint conveying device; the control module is used for adjusting the outlet pressure to be within a preset first pressure range and is also used for adjusting the backflow pressure to be within a preset second pressure range; the estimation module is used for acquiring estimated operation times according to the actual operation times, the operation frequency and the outlet pressure; and the alarm module is used for giving an alarm when the estimated operation frequency is higher than a preset frequency threshold value. The paint conveying device has the effect that different maintenance time intervals can be conveniently set for the paint conveying device in different working environments.

Description

Technical Field

[0001] The present application relates to the field of painting equipment, and particularly to an intelligent paint delivery system and device. Background Art

[0002] Automobile painting is one of the four major processes in automobile production. The paint in automobile painting is a mixed liquid that is prone to precipitation. The paint needs to flow at a certain flow rate in the circulation pipeline to prevent the paint from precipitating in the pipeline and affecting the spraying quality. And in paint spraying, it is necessary to ensure the spraying pressure.

[0003] In the prior art, generally, a paint delivery device arranged in a paint mixing room is used to send the paint into the circulation pipeline inside the paint spraying room. The circulation pipeline is connected with a spray gun, and the paint is sprayed out from the spray gun for operation. At the same time, the remaining paint in the circulation pipeline will return to the paint delivery device for circulation. The paint circulates between the circulation pipeline and the paint delivery device, thereby playing a role in preventing precipitation. The paint delivery system will control the pressure of the paint delivery device to deliver the paint, so as to ensure the spraying pressure.

[0004] The paint delivery device has problems of aging and wear during the process of delivering the paint, so it is necessary to overhaul the paint delivery device every once in a while. Due to the complex use environment of the paint delivery device, its working state is affected by various factors, such as the delivery speed, delivery pressure, etc. Therefore, in different working states of the paint delivery device, the overhaul time interval of the paint delivery device will be different. However, the traditional fixed-time interval overhaul method often fails to accurately reflect the actual condition of the paint delivery device, resulting in too short or too long overhaul intervals. The former will cause unnecessary downtime and maintenance costs, and the latter may cause equipment failures, affecting the production progress and product quality. Summary of the Invention

[0005] In order to facilitate setting different overhaul time intervals for the paint delivery device in different working environments, the present application provides an intelligent paint delivery system and device.

[0006] An intelligent paint delivery system and device provided by the present application adopt the following technical solutions: An intelligent paint delivery system, the paint delivery system includes: A first detection module, used to detect the actual operation times and operation frequency of the paint delivery device; A second detection module, used to detect the outlet pressure of the paint at the output end of the paint delivery device and the return pressure of the paint flowing back to the paint delivery device; A control module, used to adjust the outlet pressure within a preset first pressure range, and also used to adjust the return pressure within a preset second pressure range; An estimation module, used to obtain an estimated operation times according to the actual operation times, operation frequency and outlet pressure; An alarm module, configured to issue an alarm when the estimated number of operations is higher than a preset number threshold 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 preset threshold is exceeded, reminding the operator to perform maintenance in a timely manner, avoiding failures caused by equipment aging or wear, and improving production efficiency and safety. The actual number of operations is compensated by the operating frequency and the outlet pressure to form the estimated number of operations, so as to facilitate setting different maintenance time intervals for the paint conveying device in different working environments.

[0007] During the painting operation, when the pressures at both ends of the circulation pipeline in the paint mixing room are not controlled, the paint spray gun connected to the circulation pipeline in the paint mixing room sprays paint, and a pressure drop will occur in the circulation pipeline of the paint mixing room. As the number of paint spray guns spraying paint increases, the pressure drop in the circulation pipeline of the paint mixing room further increases. The paint conveying system adjusts the outlet pressure and the return pressure, so as to facilitate keeping the pressure of the paint sprayed by each paint spray gun stable.

[0008] Optionally, a frequency comparison table, a pressure comparison table, and a paint comparison table are pre-recorded in the estimation module. The frequency comparison table is the frequency weight value corresponding to different operating frequency ranges of the paint conveying device. The pressure comparison table is the pressure weight value corresponding to different outlet pressure ranges of the paint conveying device. The paint comparison table is the characteristic factor value for the paint conveying device to convey different paints. The steps for the estimation module to obtain the estimated number of operations include the following: Obtain the paint type, take the average value of the operating frequency to obtain the average frequency, and take the average value of the outlet pressure to obtain the average pressure; Obtain the frequency weight according to the average frequency and the frequency comparison table, obtain the pressure weight according to the average pressure and the pressure comparison table, and obtain the characteristic factor according to the paint type and the paint comparison table; Multiply the frequency weight, the pressure weight, the characteristic factor, and the actual number of operations to obtain the estimated number of operations.

[0009] By adopting the above technical solution, different types of paint may result in different wear when the conveying device conveys the paint. By introducing the type of paint to compensate the actual number of operations, the accuracy of setting the maintenance time interval for the paint conveying device in different environments is improved.

[0010] Optionally, after the control module adjusts the return pressure within a preset second pressure range, the following steps are further included: Obtain the pressure regulation range, and the pressure regulation range is the adjustment ratio of the return pressure; Determine whether the pressure regulation amplitude is less than a preset pressure regulation threshold; if so, adjust the outlet pressure within a preset third pressure range and stop adjusting the return pressure, where the third pressure range is less than the first pressure range; if not, continue to execute adjusting the outlet pressure within the preset first pressure range and the return pressure within the preset second pressure range; After adjusting the outlet pressure within the preset third pressure range and stopping adjusting the return pressure, obtain a pressure difference based on the outlet pressure and the return pressure; Determine whether the pressure difference is less than a preset pressure difference threshold; if so, return to obtain the pressure difference based on the difference between the outlet pressure and the return pressure; if not, the control module readjusts the outlet pressure within the preset first pressure range and adjusts the return pressure within the preset second pressure range.

[0011] By adopting the above technical solution, the greater the pressure regulation amplitude, the more spray guns in use. When the pressure regulation amplitude is lower than the pressure regulation threshold and there are no spray guns in use, the paint delivery system controls the outlet pressure of the paint delivery device within the third pressure range, so that the paint delivery device enters the standby state, thereby playing an energy-saving role.

[0012] An intelligent paint delivery device includes a circulating stirring tank, a support frame, and an electric pump. A controller, a return pipe, and a discharge pipe are fixedly installed on the support frame. The feed end of the electric pump is connected to the circulating stirring tank, the discharge 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 feed end of the spray painting pipeline, one end of the return pipe is connected to the circulating stirring tank, the end of the return pipe away from the circulating stirring tank is used to connect to the discharge end of the spray painting pipeline, a back pressure valve is fixedly installed on the return pipe, the first detection module, the control module, the estimation module, and the alarm module are integrated in the controller, the second detection module 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, the second pressure sensor is fixedly installed on the return pipe, and the second pressure sensor is located on the side of the back pressure valve away from the circulating stirring tank.

[0013] By adopting the above technical solution, the circulating stirring tank stirs the returned paint, thereby reducing the occurrence of paint precipitation inside the circulating stirring tank.

[0014] Optionally, filters are installed on both the reflux pipe and the discharge pipe. The filter of the reflux pipe is located on the side of the second pressure sensor away from the pressure valve. The filter includes a machine head, an outer cover, and a filter cartridge. The outer cover and the filter cartridge are both detachably installed on the machine head. One end of the filter cartridge away from the machine head is sealed. The filter cartridge is located inside the outer cover. The discharge end of the machine head communicates with the inside of the filter cartridge, and the feed end of the machine head communicates with the space between the filter cartridge and the outer cover.

[0015] By adopting the above technical solution, when the paint flows inside the reflux 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 passing through the filtration of the filter cartridge, thus facilitating the filtration of impurities in the paint and improving the spraying effect.

[0016] Optionally, a rotating rod and a cleaning cover are arranged inside the filter cartridge. A first connecting rod is fixedly installed between the cleaning cover and the rotating rod. The rotating rod is coaxially arranged with the filter cartridge. The opening of the cleaning cover faces away from the rotating rod and towards the inner wall of the filter cartridge. A first partition 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, and the rotating mechanism is used to drive the rotating rod to rotate.

[0017] By adopting the above technical solution, the change in the pressure of the paint conveyed by the paint delivery device will cause the change in the pressure received by the first partition membrane, so that the first partition membrane moves back and forth, allowing the paint to enter or discharge from the cleaning cover. When the paint discharges from the cleaning cover, the paint flushes the filter cartridge, thus reducing the occurrence of blockage of the filter cartridge. The rotating mechanism drives the rotating rod to rotate, and the rotating rod drives the cleaning cover to rotate, thus facilitating the cleaning cover to move to different positions of the filter cartridge for cleaning.

[0018] Optionally, the rotating mechanism includes a lifting component and a guiding component. The lifting component and the guiding component are both installed between the filter cartridge and the rotating rod. The lifting component is used to drive the rotating rod to lift, and the guiding component is used to guide the rotation when the rotating rod lifts.

[0019] By adopting the above technical solution, the lifting component drives the rotating rod to lift, and the guiding component converts the lifting of the rotating rod into rotation, thus facilitating the driving of the rotating rod to rotate.

[0020] Optionally, the lifting component includes a shielding cover, an elastic membrane, a support block, and an elastic member. The shielding cover is fixedly connected to the end of the filter cartridge away from the machine head. The elastic membrane is fixedly connected along the circumference of the support block. The outer peripheral side of the elastic membrane is fixedly connected to the inner peripheral wall of the shielding cover. The elastic member is fixedly installed on the support block and the inner wall of the shielding cover. The elastic member is used to drive the support block to move towards the machine head, and the end of the rotating rod away from the machine head is rotatably installed on the support block.

[0021] By adopting the above technical solution, when the pressure of the paint inside the filter cartridge increases, the paint squeezes the support block to move away from the machine head, and the support block drives the rotating rod to descend; when the pressure of the paint inside the filter cartridge decreases, the elastic member drives the support block to approach the machine head, and the support block drives the rotating rod to ascend, thus facilitating the driving of the lifting of the rotating rod.

[0022] Optionally, the guiding assembly includes a second connecting rod, a sliding rod, a guiding ring and guiding blocks. The guiding ring is located inside the filter cartridge near one end of the machine head. The second connecting rod is fixedly installed between the outer wall of the guiding ring and the inner wall of the filter cartridge. The guiding ring is provided with a guiding groove, and the guiding groove is repeatedly bent along the circumferential direction of the guiding ring. One end of the sliding rod is fixedly connected to the first connecting rod, and the other end of the sliding rod slidably penetrates through the guiding groove. There are multiple guiding blocks, and the guiding blocks are fixedly installed on the inner wall at the bent position of the guiding groove.

[0023] By adopting the above technical solution, during the lifting process of the rotating rod, the sliding rod slides in the guiding groove, and at the same time, the first connecting rod is guided by the guiding blocks, so that the rotating rod slides in one direction in the guiding groove, thereby facilitating the driving of the rotation of the rotating rod.

[0024] Optionally, a push plate is arranged inside the cleaning cover in a lifting and sliding manner. The push plate is located on the side of the first partition membrane close to the rotating rod. A plurality of first tooth blocks are fixedly installed on the side of the push plate away from the first partition membrane. A plurality of second tooth blocks are fixedly installed on the inner wall of the cleaning cover close to the rotating rod. The first tooth blocks and the second tooth blocks cooperate with each other to drive the push plate to squeeze the first partition membrane. A driving rod is fixedly installed at the top end of the push plate. An avoidance opening for the driving rod to pass through is formed in the top side of the cleaning cover, and a second partition membrane is fixedly installed inside the avoidance opening. The driving rod fixedly penetrates through the second partition membrane.

[0025] By adopting the above technical solution, when the rotating rod rises and falls, the rotating rod drives the cleaning cover to rise and fall together through the first connecting rod. When the cleaning cover rises, the driving rod squeezes the machine head, and the push plate and the cleaning cover move relative to each other, so that the first tooth blocks and the second tooth blocks squeeze each other, and the push plate moves away from the rotating rod. When the push plate moves away from the rotating rod, the push plate pushes the first partition membrane, thereby increasing the amount of paint discharged from inside the cleaning cover. When the cleaning cover descends, the paint squeezes the first partition membrane and the second partition membrane, so that the push plate moves towards the rotating rod, and the paint flows back into the cleaning cover again.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The actual operation times are compensated by the operation frequency and the outlet pressure to form the estimated operation times, thereby facilitating the setting of different maintenance time intervals for the paint delivery device in different working environments and reducing the influence caused by too long or too short maintenance time intervals; 2. By installing the machine head on the reflux pipe and the discharge pipe, and then when the paint flows through the machine head, the filter cartridge filters the paint, thereby improving the spraying effect; 3. According to the change of the paint pressure inside the filter cartridge, the first partition membrane will move back and forth, so that the paint is repeatedly discharged from and enters the cleaning cover. When the paint is discharged from the cleaning cover, the paint flushes the filter cartridge, thereby reducing the occurrence of filter cartridge blockage. Description of the Drawings

[0027] Figure 1 is the principle block diagram of Embodiment 1 of the present application; Figure 2 is the flowchart of steps S101 - S103 of Embodiment 1 of the present application; Figure 3 is the overall structure schematic diagram of Embodiment 1 of the present application; Figure 4 is Figure 3 the enlarged view at A; Figure 5 is the flowchart of steps S201 - S207 of Embodiment 2 of the present application; Figure 6 is the structure schematic diagram of the filter of Embodiment 2 of the present application; Figure 7 is the radial cross-sectional view of the filter of Embodiment 2 of the present application; Figure 8 is Figure 7 the enlarged view at B; Figure 9 is Figure 7 the enlarged view at C.

[0028] Description of the Reference Numerals: 1. First detection module; 2. Second detection module; 3. Control module; 4. Estimation module; 5. Alarm module; 6. Communication module; 7. Raw material stirring tank; 8. Circulation stirring tank; 9. Support frame; 10. Electric pump; 11. Feeding pump; 12. Controller; 13. Reflux 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. First partition membrane; 21. Rotating mechanism; 211. Lifting assembly; 2111. Shielding cover; 2112. Elastic membrane; 2113. Support block; 2114. Elastic member; 212. Guide assembly; 2121. Second connecting rod; 2122. Slide bar; 2123. Guide ring; 2124. Guide block; 22. Circular plate; 23. Limiting rod; 24. Guide groove; 25. Push plate; 26. First tooth block; 27. Second tooth block; 28. Avoidance opening; 29. Second partition membrane; 30. Driving rod. Detailed Embodiments

[0029] The following further describes the present application in detail with reference to the accompanying Figures 1-9 drawings.

[0030] Embodiment 1.

[0031] The embodiment of the present application discloses an intelligent paint conveying system and device.

[0032] Referring to Figure 1 , an intelligent paint conveying 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.

[0033] The first detection module 1 is used to detect the actual operation times and operation 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 flowing back to the paint conveying device.

[0034] The control module 3 presets a first pressure range and a second pressure range. The control module 3 adjusts the outlet pressure to fall within the first pressure range and adjusts the return pressure to fall within the second pressure range. During the spraying operation, the pressure ejected by the spray gun will be between the outlet pressure and the return pressure. By controlling the outlet pressure and the return pressure, the stability of the spraying pressure is improved.

[0035] The estimation module 4 is pre-entered with a frequency comparison table, a pressure comparison table, and a paint comparison table. The frequency comparison table is the frequency weight value corresponding to different operation frequency ranges of the paint conveying device. The pressure comparison table is the pressure weight value corresponding to different outlet pressure ranges of the paint conveying device. The paint comparison table is the characteristic factor value corresponding to different paints conveyed by the paint conveying device.

[0036] Referring to Figure 1 、 Figure 2 , the estimation module 4 is used to obtain the estimated operation times according to the actual operation times, operation frequency, and outlet pressure, and specifically includes the following steps: S101. Obtain the paint type, take the average value of the operation frequency to obtain the average frequency, and take the average value of the outlet pressure to obtain the average pressure. Then perform step S102.

[0037] S102. Obtain the frequency weight according to the average frequency and the frequency comparison table, obtain the pressure weight according to the average pressure and the pressure comparison table, and obtain the characteristic factor according to the paint type and the paint comparison table. Then perform step S103.

[0038] The estimation module 4 retrieves the frequency comparison table and selects the frequency weight according to the frequency range where the average frequency is located. The estimation module 4 retrieves the pressure comparison table and selects the pressure weight according to the pressure range where the average pressure is located, so as to obtain the pressure weight. The staff manually inputs the paint type conveyed by the paint conveying device into the estimation module 4. The estimation module 4 searches the paint comparison table according to the paint type to obtain the characteristic factor.

[0039] S103. Obtain the estimated operation times by taking the product of the frequency weight, pressure weight, characteristic factor, and actual operation times.

[0040] The paint delivery device needs to be overhauled after operating for a certain number of times or being used for a certain period. In this application, the operation times are used to determine whether the paint delivery device needs to be overhauled. After the paint delivery device operates for a certain number of times, it needs to be overhauled. However, different frequencies, pressures, and paint types have different degrees of wear on the paint delivery device. The actual operation times are compensated by the frequency weight, pressure weight, and characteristic factor to form the estimated operation times, so as to facilitate setting different overhaul time intervals for the paint delivery device in different working environments.

[0041] The alarm module 5 presets a threshold for the number of times. When the estimated operation times are greater than the threshold for the number of times, the alarm module 5 issues an alarm to remind the staff to overhaul the paint delivery device.

[0042] In this application, a communication module 6 is also provided. The alarm issued by the alarm module 5 and the data detected by the first detection module 1 and the second detection module 2 are uploaded through the communication module 6 for convenient remote viewing.

[0043] Refer to Figure 3 、 Figure 4 , An intelligent paint delivery device, using an intelligent paint delivery system of 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 feeding end of the feeding pump 11 is connected to the raw material mixing tank 7, and the discharging end of the feeding pump 11 is connected to the circulating mixing tank 8. The preparation of the paint is carried out in the raw material mixing tank 7. After adding materials to the raw material mixing tank 7 and stirring and mixing them to form the paint, the feeding pump 11 conveys the paint into the circulating mixing tank 8.

[0044] Both the circulating mixing tank 8 and the raw material mixing tank 7 are provided with liquid level sensors. A controller 12 is fixedly installed on the support frame 9. The liquid level sensors send the detected liquid levels to the controller 12. The controller 12 uploads the liquid levels of the circulating mixing tank 8 and the raw material mixing tank 7 to the mobile terminal of the staff, so as to facilitate the staff to understand the liquid levels of the circulating mixing tank 8 and the raw material mixing tank 7.

[0045] A return pipe 13 and a discharging pipe 14 are also fixedly installed on the support frame 9. The feeding end of the electric pump 10 is connected to the circulating mixing tank 8, and the discharging end of the electric pump 10 is connected to one end of the discharging pipe 14. The other end of the discharging pipe 14 is connected to the feeding end of the paint spraying booth circulation pipeline, so as to facilitate providing paint for the paint spraying booth.

[0046] One end of the return pipe 13 is connected to the discharge end of the paint spraying booth circulation pipeline, and the other end of the return pipe 13 is fixedly connected to the circulation stirring tank 8. The paint in the paint spraying booth flows from the return pipe 13 into the circulation stirring tank 8. The paint circulates between the paint mixing room and the paint spraying booth, and the circulation stirring tank 8 stirs the paint, thereby reducing the occurrence of paint precipitation.

[0047] Filters 15 are fixedly installed on both the return pipe 13 and the discharge pipe 14. In the embodiment of the present application, the filter 15 on the return pipe 13 is a bag filter, and the remaining filters 15 are cartridge filters. A filter 15 is also installed between the feeding pump 11 and the circulation stirring tank 8. The filter 15 is 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 close to the circulation stirring tank 8.

[0048] The first detection module 1, the estimation module 4, the alarm module 5 and the control module 3 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 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 circulation stirring 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 the embodiment of the present application, the controller 12 adjusts the outlet pressure by changing the frequency of the electric pump 10.

[0049] When the electric pump 10 operates, the motor inside the electric pump 10 rotates, thereby enabling the electric pump 10 to transport paint. The actual number of revolutions is the number of rotations of the motor.

[0050] A flow rate sensor is also provided in the circulation pipeline of the paint mixing room. The flow rate sensor is used to detect the flow rate of the paint in the circulation pipeline and send it to the controller 12. The controller 12 uploads it through the communication module 6, so as to facilitate the staff to understand the flow rate of the paint.

[0051] The implementation principle of an intelligent paint delivery system and device in the embodiment of the present application is as follows: In different working environments, the maintenance time intervals of the paint delivery device are different. Generally, the factors affecting the maintenance time interval of the paint delivery device are the outlet pressure, the operating frequency and the paint type. The average frequency and the average pressure are obtained by calculating the mean values of the operating frequency and the outlet pressure respectively, and then the frequency weight is found from the frequency comparison table according to the operating frequency range where the average frequency is located, and the pressure weight is found from the pressure comparison table according to the outlet pressure range where the average pressure is located. At the same time, the staff enters the paint type transported by the paint delivery device into the paint delivery system, and finds the characteristic factor from the paint comparison table according to the paint type.

[0052] After that, the estimated operating times are obtained by multiplying the frequency weight, the pressure weight, the characteristic factor, and the actual number of operating times. The estimated operating times are compensated by the frequency weight, the pressure weight, and the characteristic factor, so as to facilitate setting different maintenance time intervals for the paint feeding device in different working environments.

[0053] In this application, detection data such as the actual number of operating times, the operating frequency, the outlet pressure, the return pressure, and the paint flow rate are uploaded through the communication module 6, so as to facilitate the staff to determine whether the paint feeding device fails according to the detection data.

[0054] Embodiment 2.

[0055] The embodiment of this application discloses an intelligent paint feeding system and device.

[0056] Referring to Figure 5 , the difference between an intelligent paint feeding system in the embodiment of this application and that in Embodiment 1 is that after the control module 3 adjusts the return pressure within a preset second pressure range, the following steps are further included: S201. Obtain the pressure regulation range. Then step S202 is executed.

[0057] The control module 3 controls the return pressure through the back pressure valve 16. Generally, the back pressure valve 16 adjusts the pressure by charging and discharging air. The pressure regulation range is obtained through the change in air pressure before and after the back pressure valve 16 is charged. In another embodiment, the air pressure of the air charged into the back pressure valve 16 can also be directly used as the pressure regulation range.

[0058] S202. Judge whether the pressure regulation range is less than a preset pressure regulation threshold; if so, step S203 is executed; if not, step S204 is executed.

[0059] When the paint conveyed by the paint feeding device flows back through the circulation pipeline, the pressure drop of the outlet pressure to form the return pressure is mainly affected by the resistance of the circulation pipeline and the number of spray guns in operation. The value of the pressure regulation threshold falls between the pressure regulation ranges of the two back pressure valves 16 when all spray guns stop operating and only one spray gun is operating. By comparing the pressure regulation range with the pressure regulation threshold, it is convenient to judge whether spraying operation is in progress.

[0060] S203. Adjust the outlet pressure within a preset third pressure range and stop adjusting the return pressure. Then step S205 is executed.

[0061] The third pressure range is smaller than the first pressure range. The pressure regulation range is less than the pressure regulation threshold, so no spray gun is spraying. When the outlet pressure falls within the third pressure range, the flow rate of the paint conveyed by the paint feeding device can prevent paint precipitation, thereby reducing energy consumption.

[0062] In another embodiment, after the increased pressure regulation range is less than a preset pressure regulation threshold for a certain period of time, step S203 is executed.

[0063] S204. Continue to adjust the outlet pressure within the preset first pressure range and the return pressure within the preset second pressure range.

[0064] The pressure regulation range is greater than the pressure regulation threshold, so there is a spray gun in operation. Let the outlet pressure be within the first pressure range and the return pressure be within the second pressure range, so as to conveniently improve the stability of the pressure when the spray gun sprays paint.

[0065] S205. Obtain the pressure difference according to the outlet pressure and the return pressure. Then step S206 is executed.

[0066] The control module 3 obtains the pressure difference according to the difference between the outlet pressure and the return pressure.

[0067] S206. Determine whether the pressure difference is less than a preset pressure difference threshold; if so, return to execute step S205; if not, execute step S207.

[0068] S207. The control module 3 readjusts the outlet pressure within the preset first pressure range and adjusts the return pressure within the preset second pressure range.

[0069] When there is no spray gun for painting operation, the pressure difference between the outlet pressure and the return pressure is small, so step S205 is continued to be executed, waiting for a spray gun to perform painting operation. After a spray gun performs painting operation, the pressure difference increases, and the control module 3 readjusts the outlet pressure within the preset first pressure range and adjusts the return pressure within the preset second pressure range, so as to conveniently make the paint pressure sprayed by the spray gun meet the requirements.

[0070] Refer to Figure 6 、 Figure 7 In this application, a difference between an intelligent paint conveying device in an embodiment of the present application and that in Embodiment 1 is that the filter 15 includes a machine head 151, an outer cover 152 and a filter cartridge 153. The outer cover 152 and the filter cartridge 153 are both detachably installed on the machine head 151, and the filter cartridge 153 is located inside the outer cover 152. In this application, the outer cover 152 and the filter cartridge 153 are threadedly inserted into the machine head 151 and are sealed by an O-ring at the same time, so as to realize the detachable installation of the outer cover 152 and the filter cartridge 153 on the machine head 151.

[0071] The machine head 151 has a feed end and a discharge end. The discharge end of the machine head 151 is in communication with the interior of the filter cartridge 153, and the feed end of the machine head 151 communicates with the space between the filter cartridge 153 and the outer cover 152. Paint enters the space between the filter cartridge 153 and the outer cover 152 from the feed end of the machine head 151, and then the paint flows into the interior of the filter cartridge 153. The paint inside the filter cartridge 153 is then discharged from the discharge end of the machine head 151.

[0072] Referring to Figure 7 、 Figure 8 , a rotating rod 17 and a cleaning cover 18 are provided inside the filter cartridge 153, and 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, and the opening of the cleaning cover 18 faces away from the rotating rod 17 and towards the inner wall of the filter cartridge 153. A first partition membrane 20 is fixedly installed inside the cleaning cover 18.

[0073] When the control module 3 controls the outlet pressure within the first pressure range, the first partition membrane 20 is under a greater pressure from the paint, so that the first partition membrane 20 moves towards the rotating rod 17 and the paint enters the interior of the cleaning cover 18. When the control module 3 controls the outlet pressure within the third pressure range, the first partition membrane 20 is under a smaller pressure from the paint, and the first partition membrane 20 moves away from the rotating rod 17, so that the paint inside the cleaning cover 18 is discharged. When the paint inside the cleaning cover 18 is discharged, the paint flushes the filter cartridge 153, thus playing a role in delaying the blockage of the filter cartridge 153.

[0074] Referring to Figure 8 、 Figure 9 , the filter cartridge 153 is provided with a rotating mechanism 21, and the rotating mechanism 21 includes a lifting assembly 211 and a guiding assembly 212. The lifting assembly 211 includes a shielding cover 2111, an elastic membrane 2112, a support block 2113 and an elastic member 2114. The shielding cover 2111 is fixedly connected to the end of the filter cartridge 153 away from the machine head 151, thus blocking the end of the filter cartridge 153 away from the machine head 151. The elastic membrane 2112 is fixedly connected along the circumference of the support block 2113, and the outer peripheral side of the elastic membrane 2112 is fixedly connected to the inner peripheral wall of the shielding cover 2111. The elastic member 2114 is fixedly installed between the support block 2113 and the inner wall of the shielding cover 2111, and the elastic member 2114 is used to drive the support block 2113 to move towards the machine head 151. In the embodiment of the present application, the elastic member 2114 uses a spring.

[0075] When the control module 3 controls the outlet pressure within the first pressure range, the support block 2113 is under a greater pressure from the paint, so that the support block 2113 compresses the spring and descends away from the machine head 151. When the control module 3 controls the outlet pressure within the third pressure range, the support block 2113 is under a smaller pressure from the paint, and the spring restores its deformation to drive the support block 2113 to rise close to the machine head 151.

[0076] A circular plate 22 is fixedly installed at one end of the rotating rod 17 away from the machine head 151. A limiting rod 23 is fixedly installed on one side of the support block 2113 close to the machine head 151. The limiting rod 23 is L-shaped and abuts against one side of the circular plate 22 close to the machine head 151, so that the rotating rod 17 is rotatably installed on the support block 2113. When the support block 2113 moves up and down, the support block 2113 will drive the rotating rod 17 to move up and down together.

[0077] Refer to Figure 8 、 Figure 9 , the guiding assembly 212 includes a second connecting rod 2121, a sliding rod 2122, a guiding ring 2123 and a guiding block 2124. The guiding ring 2123 is located inside one end of the filter cartridge 153 close to the machine head 151. The second connecting rod 2121 is fixedly installed between the outer wall of the guiding ring 2123 and the inner wall of the filter cartridge 153. A guiding groove 24 is formed in the inner wall of the guiding ring 2123, and the guiding groove 24 is repeatedly bent along the circumferential direction of the guiding ring 2123. One end of the sliding rod 2122 is fixedly connected to the first connecting rod 19, and the sliding rod 2122 is bent so that the other end slidably penetrates through the guiding groove 24. There are multiple guiding blocks 2124, and the guiding blocks 2124 are fixedly installed on the inner wall at the bent position of the guiding groove 24.

[0078] When the support block 2113 drives the rotating rod 17 to move up and down, the rotating rod 17 drives the sliding rod 2122 to move up and down through the first connecting rod 19. When the sliding rod 2122 moves up and down, it slides inside the guiding groove 24. Through the cooperation of the sliding rod 2122 and the guiding groove 24, it is convenient to drive the rotating rod 17 to rotate. The rotating rod 17 rotates, so as to conveniently drive the cleaning cover 18 to move to different positions of the filter cartridge 153 for cleaning. The guiding block 2124 is used to guide the sliding rod 2122 to move in one direction inside the guiding groove 24.

[0079] Refer to Figure 8 、 Figure 9 , a push plate 25 is arranged to move up and down and slide inside the cleaning cover 18. The push plate 25 is located on one side of the first partition membrane 20 close to the rotating rod 17. A plurality of first tooth blocks 26 are fixedly installed on the side of the push plate 25 away from the first partition membrane 20. A plurality of second tooth blocks 27 are fixedly installed on the inner wall of the cleaning cover 18 close to the rotating rod 17. Both the first tooth block 26 and the second tooth block 27 are hemispherical, and the first tooth block 26 and the second tooth block 27 cooperate with each other to drive the push plate 25 to press the first partition membrane 20. A driving rod 30 is fixedly installed at the top end of the push plate 25, and an avoidance opening 28 for the driving rod 30 to pass through is formed in the top side of the cleaning cover 18. A second partition membrane 29 is fixedly installed inside the avoidance opening 28, and the driving rod 30 fixedly penetrates through the second partition membrane 29.

[0080] When the rotating rod 17 drives the cleaning cover 18 to rise, the top end of the driving rod 30 presses against the machine head 151, so that the push plate 25 stops rising. Then when the rotating rod 17 continues to drive the cleaning cover 18 to rise, the first tooth block 26 and the second tooth block 27 press against each other, so that the push plate 25 moves away from the rotating rod 17, and the push plate 25 drives the first partition membrane 20 to move away from the rotating rod 17. By pushing the first partition membrane 20 to move away from the rotating rod 17 through the push plate 25, the amount of paint discharged from the cleaning cover 18 is increased, thereby improving the cleaning effect on the filter cartridge 153.

[0081] When the rotating rod 17 drives the cleaning cover 18 to descend, the driving rod 30 is separated from the machine head 151, and the first partition membrane 20 and the second partition membrane 29 are reset under the extrusion of the paint, so that the first tooth block 26 and the second tooth block 27 are staggered again.

[0082] The top end of the driving rod 30 is spherical. When the rotating rod 17 drives the cleaning cover 18 to rotate, if the top end of the driving rod 30 presses against the second connecting rod 2121, the driving rod 30 moves downward, so as to facilitate the driving rod 30 to avoid the second connecting rod 2121.

[0083] The implementation principle of an intelligent paint delivery system and device according to an embodiment of the present application is as follows: due to the pressure change inside the filter 15, the deformation of the first partition membrane 20 will discharge 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 playing a role in delaying the blockage of the filter cartridge 153.

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An intelligent paint feeding system, characterized in that, The paint delivery system includes: A first detection module (1) for detecting the actual operation times and operation frequency of the paint delivery device; A second detection module (2) for detecting the outlet pressure of the paint at the output end of the paint delivery device and the return pressure of the paint flowing back to the paint delivery device; A control module (3) for adjusting the outlet pressure within a preset first pressure range and also for adjusting the return pressure within a preset second pressure range; An estimation module (4) for obtaining an estimated operation times based on the actual operation times, operation frequency and outlet pressure; An alarm module (5) for giving an alarm when the estimated operation times is higher than a preset times threshold; 2. An intelligent paint feeding system according to claim 1, wherein The estimation module (4) is pre-recorded with a frequency comparison table, a pressure comparison table and a paint comparison table. The frequency comparison table is the frequency weight values corresponding to different operation frequency ranges of the paint delivery device. The pressure comparison table is the pressure weight values corresponding to different outlet pressure ranges of the paint delivery device. The paint comparison table is the characteristic factor values for the paint delivery device to convey different paints. The steps for the estimation module (4) to obtain the estimated operation times include: Obtaining the paint type, taking the average value of the operation 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; Taking the product of the frequency weight, pressure weight, characteristic factor and actual operation times to obtain the estimated operation times.

3. An intelligent paint feeding system according to claim 1, characterized in that: After the control module (3) adjusts the return pressure within a preset second pressure range, the following steps are further included: Obtaining the pressure regulation range, where the pressure regulation range is the adjustment ratio of the return pressure; Judging whether the pressure regulation range is less than a preset pressure regulation threshold; if so, adjusting the outlet pressure within a preset third pressure range and stopping the adjustment of the return pressure, where the third pressure range is smaller than the first pressure range; if not, continuing to execute the adjustment of the outlet pressure within the preset first pressure range and the return pressure within the preset second pressure range; After adjusting the outlet pressure within a preset third pressure range and stopping the adjustment of the return pressure, obtaining the pressure difference according to the outlet pressure and the return pressure; Judging whether the pressure difference is less than a preset pressure difference threshold; if so, returning to obtain the pressure difference according to the difference between the outlet pressure and the return pressure; if not, the control module (3) readjusts the outlet pressure within the preset first pressure range and adjusts the return pressure within the preset second pressure range.

4. An intelligent paint feeding device, using an intelligent paint feeding system as described in claim 3, characterized in that: It includes a circulating stirring tank (8), a support frame (9) and an electric pump (10). A controller (12), a reflux pipe (13) and a discharge pipe (14) are fixedly installed on the support frame (9). The feed end of the electric pump (10) is connected to the circulating stirring tank (8), the discharge end of the electric pump (10) is connected to one end of the discharge pipe (14), and the end of the discharge pipe (14) away from the electric pump (10) is used to connect to the feed end of the painting pipeline. One end of the reflux pipe (13) is connected to the circulating stirring tank (8), and the end of the reflux pipe (13) away from the circulating stirring tank (8) is used to connect to the discharge end of the painting pipeline. A back pressure valve (16) is fixedly installed on the reflux pipe (13). The first detection module (1), the control module (3), the estimation module (4) and the 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 at the discharge end of the electric pump (10), and the second pressure sensor is fixedly installed on the reflux pipe (13). The second pressure sensor is located on the side of the back pressure valve (16) away from the circulating stirring tank (8).

5. An intelligent paint feeding device according to claim 4, characterized in that: Filters (15) are installed on both the reflux pipe (13) and the discharge pipe (14). The filter (15) on the reflux pipe (13) is located on the side of the second pressure sensor away from the back pressure valve. The filter (15) includes a head (151), an outer cover (152) and a filter cartridge (153). The outer cover (152) and the filter cartridge (153) are both detachably installed on the head (151). One end of the filter cartridge (153) away from the head (151) is blocked. The filter cartridge (153) is located inside the outer cover (152). The discharge end of the head (151) is communicated with the inside of the filter cartridge (153), and the feed end of the head (151) is communicated with the space between the filter cartridge (153) and the outer cover (152).

6. The intelligent paint feeding device according to claim 5, characterized in that: A rotating rod (17) and a cleaning cover (18) are arranged inside the filter cartridge (153). 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 cartridge (153). The opening of the cleaning cover (18) faces away from the rotating rod (17) and towards the inner wall of the filter cartridge (153). A first partition membrane (20) is fixedly installed on the inner wall of the cleaning cover (18). A rotating mechanism (21) is installed between the filter cartridge (153) and the rotating rod (17). The rotating mechanism (21) is used to drive the rotating rod (17) to rotate.

7. An intelligent paint feeding device according to claim 6, characterized in that: The rotating mechanism (21) includes a lifting component (211) and a guiding component (212). The lifting component (211) and the guiding component (212) are both installed between the filter cartridge (153) and the rotating rod (17). The lifting component (211) is used to drive the rotating rod (17) to lift, and the guiding component (212) is used to guide the rotation when the rotating rod (17) lifts.

8. An intelligent paint feeding device according to claim 7, wherein: The lifting assembly (211) includes a shielding cover (2111), an elastic membrane (2112), a support block (2113) and an elastic member (2114). The shielding cover (2111) is fixedly connected to one end of the filter cartridge (153) away from the machine head (151). The elastic membrane (2112) is fixedly connected along the circumferential side of the support block (2113). The outer peripheral side of the elastic membrane (2112) is fixedly connected to the inner peripheral wall of the shielding cover (2111). The elastic member (2114) is fixedly installed on the support block (2113) and the inner wall of the shielding cover (2111). The elastic member (2114) is used to drive the support block (2113) to move towards the machine head (151). One end of the rotating rod (17) away from the machine head (151) is rotatably installed on the support block (2113).

9. The intelligent paint feeding device according to claim 7, characterized in that: The guiding assembly (212) includes a second connecting rod (2121), a sliding rod (2122), a guiding ring (2123) and a guiding block (2124). The guiding ring (2123) is located inside one end of the filter cartridge (153) close to the machine head (151). The second connecting rod (2121) is fixedly installed between the outer wall of the guiding ring (2123) and the inner wall of the filter cartridge (153). The guiding ring (2123) is provided with a guiding groove (24). The guiding groove (24) is repeatedly bent along the circumferential direction of the guiding ring (2123). One end of the sliding rod (2122) is fixedly connected to the first connecting rod (19). The other end of the sliding rod (2122) slidably penetrates through the guiding groove (24). There are multiple guiding blocks (2124), and the guiding blocks (2124) are fixedly installed on the inner wall of the bent position of the guiding groove (24).

10. An intelligent paint feeding device according to claim 8, characterized in that: A push plate (25) is arranged inside the cleaning cover (18) in a lifting and sliding manner. The push plate (25) is located on one side of the first partition membrane (20) close to the rotating rod (17). A plurality of first tooth blocks (26) are fixedly installed on the side of the push plate (25) away from the first partition membrane (20). A plurality of second tooth blocks (27) are fixedly installed on the inner wall of the cleaning cover (18) close to 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 partition membrane (20). A driving rod (30) is fixedly installed at the top end of the push plate (25). An avoidance opening (28) for the driving rod (30) to pass through is formed in the top side of the cleaning cover (18). A second partition membrane (29) is fixedly installed inside the avoidance opening (28). The driving rod (30) fixedly penetrates through the second partition membrane (29).

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