A cleaning device for paint pipes and tanks

Abstract

This application relates to a cleaning device for coating pipelines and tanks, belonging to the field of optical fiber drawing production technology. It includes: a pipeline unit connected to the inlet pipeline and the outlet pipeline, forming a circulation path; a gas purging unit connected to the pipeline unit; a solvent rinsing unit connected to the pipeline unit; a valve group unit disposed on the pipeline unit and the coating pipeline, used to switch the flow direction of the medium within the pipeline; and a control unit used to control the start and stop of the gas purging unit, the solvent rinsing unit, and the valve group unit to achieve switching between discharge mode, rinsing mode, and drying mode. This application, through switching between three modes—discharge, solvent rinsing, and gas drying—effectively removes residual coating, solvent, and moisture from the coating pipelines and tanks, avoiding cross-contamination between different batches of coating, improving product quality and production stability; it also reduces manual operation, lowers operational risks, saves cleaning materials, and reduces costs.

Description

Technical Field

[0001] This application relates to the field of optical fiber drawing production technology, and in particular to a cleaning device for coating pipes and tanks. Background Technology

[0002] In the optical fiber drawing process, regular cleaning of coating pipes and tanks is crucial for ensuring coating quality and production efficiency. Traditional cleaning methods, to remove air bubbles or replace coatings, typically require manually disassembling the pipes and tanks, immersing them in solvents for cleaning, and then reassembling them. However, this traditional cleaning method has several problems.

[0003] First, traditional cleaning methods are inefficient. The process involves disassembling and reassembling pipes, which is cumbersome and time-consuming, directly impacting production efficiency. Furthermore, the pipes are easily contaminated during disassembly and reassembly, leading to poor cleaning results. Second, manual operation exposes employees to direct contact with paint solvents, posing a potential health hazard. Additionally, due to the limitations of manual operation, traditional cleaning methods often fail to achieve thorough cleaning, especially in complex piping systems, leaving paint residues that can hinder subsequent production processes.

[0004] Therefore, there is an urgent need to develop a new cleaning device to improve cleaning efficiency, reduce employee health risks, and ensure the purity of the coating during the production process. Utility Model Content

[0005] In order to reduce labor costs, minimize the hazards of chemical exposure, and improve cleaning efficiency and effectiveness, this application provides a cleaning device for paint pipes and tanks.

[0006] The cleaning device for paint pipelines and tanks provided in this application adopts the following technical solution:

[0007] A cleaning device for a paint pipeline and a material tank, wherein the paint pipeline includes an inlet pipe and an outlet pipe communicating with the material tank; the cleaning device includes:

[0008] The pipeline unit is connected to the feed pipeline and the discharge pipeline to form a circulation path;

[0009] A gas purging unit is connected to the pipeline unit;

[0010] A solvent rinsing unit is connected to the pipeline unit;

[0011] A valve assembly unit is installed on the pipeline unit and the coating pipeline to switch the flow direction of the medium in the pipeline;

[0012] The control unit is used to control the start and stop of the gas purging unit, the solvent rinsing unit and the valve group unit to switch between discharge mode, rinsing mode and drying mode.

[0013] By adopting the above technical solution, an efficient and thorough cleaning process is achieved through an automated control system, effectively improving the cleanliness of paint pipelines and tanks and increasing production efficiency. Through switching between three modes—discharge, solvent rinsing, and gas drying—and utilizing the dual effects of gas purging and solvent rinsing, paint residue, solvent, and moisture in the paint pipelines and tanks are thoroughly removed, ensuring no contamination and no moisture residue. This avoids cross-contamination between different batches of paint, thereby improving product quality consistency and production process stability. Simultaneously, the device reduces manual operation, lowers operational risks and the possibility of employee exposure to hazardous substances, and enhances the safety of the working environment. Furthermore, the automated and efficient cleaning process saves significant amounts of solvent and cleaning material consumption, reducing costs and environmental pollution, meeting the energy-saving and environmental protection requirements of modern production.

[0014] In one specific implementation, a recycling bin is also included, which is connected to the piping unit.

[0015] By adopting the above technical solution, and by setting up a recycling bin and connecting it to the pipeline unit, the paint and solvents used in the cleaning process can be effectively recycled, preventing the paint and solvents from flowing directly into the external environment, thereby reducing the pollution that may be caused to the environment during the production process.

[0016] In one specific implementation, the piping unit includes:

[0017] The first pipe is connected to the feed pipe;

[0018] The second pipe is connected to the discharge pipe;

[0019] A third pipe connects the first pipe and the second pipe;

[0020] The solvent rinsing unit is located on the third pipe, which is connected to the gas purging unit, and the second pipe is connected to the recovery tank.

[0021] By adopting the above technical solution and utilizing a rationally designed pipeline unit, including a first pipeline, a second pipeline, and a third pipeline, the process and structure of paint pipeline cleaning are optimized. The solvent rinsing unit is set on the third pipeline, which can efficiently perform solvent rinsing, while the connection between the gas purging unit and the third pipeline can achieve effective drying. At the same time, the second pipeline is connected to the recovery tank to ensure that the paint and solvent are effectively recovered during the cleaning process, avoiding external environmental pollution.

[0022] In one specific implementation, the valve assembly unit includes:

[0023] The first valve is located at the connection between the gas purging unit and the third pipeline;

[0024] The second valve is located on the side of the third pipeline near the outlet of the solvent rinsing unit;

[0025] The third valve is located on the side of the first pipe near the feed pipe;

[0026] The fourth valve is located on the side of the feed pipe away from the material tank;

[0027] The fifth valve is located on the side of the discharge pipe away from the material tank;

[0028] The sixth valve is located on the side of the second pipe near the discharge pipe;

[0029] The seventh valve is located on the side of the second pipeline near the recycling bin;

[0030] The eighth valve is located on the side of the third pipeline near the inlet of the solvent flushing unit.

[0031] By adopting the above technical solution and utilizing the configuration of multiple valves, the flow direction and media flow of the gas purging unit, solvent rinsing unit, and pipelines can be flexibly controlled. Each valve is set in a key position to ensure that the flow of gas and solvent can be accurately adjusted under different operating conditions, and the cleaning and recovery processes can be switched, achieving efficient operation and control of the pipeline system. Through the cooperation of valves, the media flow path of each pipeline can be managed, improving the cleaning efficiency of the production line, avoiding unnecessary resource waste, and ensuring the recovery of coatings and solvents and environmental protection.

[0032] In one specific implementation, the control unit is configured to:

[0033] Discharge mode: The gas purging unit is activated, the first valve, the third valve, the sixth valve, and the seventh valve are opened, and the other valves are closed;

[0034] Flushing mode: The solvent flushing unit is activated, the second valve, the third valve, the sixth valve, and the eighth valve are opened, and the other valves are closed;

[0035] Drying mode: The gas purging unit is turned on, the first valve, the third valve, the sixth valve, and the seventh valve are opened, and the other valves are closed.

[0036] By adopting the above technical solution and using the control unit to configure valve switches in different modes, the efficient switching between three modes of material discharge, rinsing and drying can be achieved, thereby realizing an efficient and automated cleaning process, reducing manual intervention, improving cleaning efficiency and cleanliness, and ensuring environmental protection.

[0037] In one specific implementation, the gas purging unit includes a nitrogen pressure pump.

[0038] By adopting the above technical solution and using a nitrogen pressure pump, high-pressure output can be ensured during the gas purging process, and pipeline cleaning and drying operations can be completed quickly and thoroughly, improving the overall cleaning efficiency of the production process, while also enhancing the safety and environmental friendliness of the system.

[0039] In one specific implementation, the solvent flushing unit includes a circulating pressure pump and a heating device. The heating device is filled with solvent and is used to heat the solvent. The heated solvent is then sent into the pipeline for flushing via the circulating pressure pump.

[0040] By adopting the above technical solution, the heating device can heat the solvent, improve the cleaning effect of the solvent, and ensure that the flow pressure of the solvent is effectively guaranteed during the pipeline flushing process; the circulating pressure pump sends the heated solvent into the pipeline to form an efficient flushing flow, thoroughly removing residual substances in the pipeline; thereby improving cleaning efficiency, ensuring efficient use of solvent, and reducing energy consumption and environmental pollution during the cleaning process.

[0041] In one specific implementation, the heating device is equipped with a temperature sensor, which is electrically connected to the control unit.

[0042] By adopting the above technical solution, the temperature sensor can provide real-time feedback on the heating status of the solvent. The control unit automatically adjusts the working status of the heating device based on the sensor feedback signal to ensure that the solvent is rinsed within the optimal temperature range, thereby improving the cleaning effect and avoiding overheating that could damage the equipment or waste energy.

[0043] In one specific implementation, the piping unit is equipped with a pressure sensor, which is electrically connected to the control unit.

[0044] By adopting the above technical solution, the pressure sensor can continuously detect pressure changes in the pipeline. Based on the feedback from the pressure sensor, the control unit automatically adjusts the working status of relevant valves or pumps to prevent equipment damage or efficiency reduction caused by abnormal pressure, thereby improving the stability, safety and operating efficiency of the entire system.

[0045] In one specific implementation, the piping unit is further provided with a pressure reducing valve, which is electrically connected to the control unit.

[0046] By adopting the above technical solution, the pressure reducing valve can adjust the pressure in the pipeline according to the instructions of the control unit, ensuring that the pressure is maintained within a safe and reasonable range, preventing damage to pipelines or equipment due to excessive pressure, and improving the stability, safety and reliability of the system.

[0047] In summary, the beneficial technical effects of this application are as follows: This cleaning device achieves a highly efficient and thorough automated cleaning process through an intelligent control system, improving the cleanliness of paint pipelines and tanks and increasing production efficiency; by switching between discharge mode, solvent rinsing mode, and drying mode, it utilizes the dual action of gas purging and solvent rinsing to thoroughly remove paint residue, solvent, and moisture from pipelines and tanks, thereby avoiding cross-contamination, ensuring no pollution and no moisture residue, and improving product quality consistency and production process stability;

[0048] Through a rational pipeline unit design and multi-valve configuration, this device can flexibly control the flow of gas and solvent during the cleaning process, optimize the cleaning and recovery process, ensure the efficient recovery of coatings and solvents, and avoid polluting the external environment. In addition, the intelligent configuration of nitrogen pressure pump, circulating pressure pump, heating device, pressure sensor, temperature sensor and other components ensures efficient, stable and safe operation during the cleaning process. The linkage adjustment of pressure reducing valve and control unit ensures that the pressure in the pipeline is maintained within a safe range, and optimizes fluid transmission and cleaning effect. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of the cleaning device for the paint pipeline and tank in an embodiment of this application.

[0050] Explanation of reference numerals in the attached drawings: 1. Paint pipe; 11. Feed pipe; 12. Discharge pipe; 2. Material tank; 3. Piping unit; 31. First pipe; 32. Second pipe; 33. Third pipe; 4. Gas purging unit; 41. Nitrogen pressure pump; 5. Solvent rinsing unit; 51. Circulating pressure pump; 52. Heating device; 6. Valve group unit; 61. First valve; 62. Second valve; 63. Third valve; 64. Fourth valve; 65. Fifth valve; 66. Sixth valve; 67. Seventh valve; 68. Eighth valve; 7. Control unit; 71. PLC controller; 8. Recycling bin. Detailed Implementation

[0051] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0052] This application discloses a cleaning device for paint pipelines and tanks, which achieves an efficient and thorough cleaning process through an automated control system. In this embodiment, the paint pipeline 1 includes an inlet pipeline 11 and an outlet pipeline 12, which are located on both sides of the tank 2 and extend into and communicate with the tank 2. This design allows the cleaning device to operate in different working modes, ensuring that residual paint, solvents, and other substances in the paint pipeline 1 are effectively removed, avoiding cross-contamination between different batches of paint during the production process.

[0053] Reference Figure 1 The cleaning device mainly includes the following units:

[0054] Pipeline unit 3 is connected to feed pipeline 11 and discharge pipeline 12 to form a circulation path, through which the cleaning operation of paint pipeline 1 and material tank 2 is realized;

[0055] The gas purging unit 4 is connected to the pipeline unit 3 and is responsible for purging the paint pipeline 1 during the cleaning process, using the pressure of the gas to expel the residual substances in the pipeline.

[0056] Solvent rinsing unit 5 is connected to pipeline unit 3. Solvent is injected into paint pipeline 1 through pipeline unit 3. The solvent circulates in the pipeline to dissolve and remove residual paint in paint pipeline 1 and tank 2.

[0057] Valve unit 6, installed on pipe unit 3 and paint pipe 1, is used to control the path of medium flow during the cleaning process, and is responsible for switching different fluid flow directions to ensure smooth switching between different cleaning modes.

[0058] The control unit 7 is electrically connected to the gas purging unit 4, the solvent flushing unit 5, and the valve group unit 6, and is used to control the start and stop of the gas purging unit 4, the solvent flushing unit 5, and the valve group unit 6 to switch between the discharge mode, the flushing mode, and the drying mode.

[0059] The recycling bin 8 is connected to the pipeline unit 3, which enables the effective recovery of paint and solvents during the cleaning process, preventing paint and solvents from flowing directly into the external environment, thereby reducing the pollution that may be caused to the environment during the production process.

[0060] During the cleaning process, the discharge mode is activated first. The control unit 7 controls the gas purging unit 4 to open and adjusts the switching state of the valve group unit 6 to discharge the residual paint in the paint pipe 1 and the material tank 2 into the recovery tank 8, removing the residual paint in the pipes and preparing for subsequent cleaning. After the discharge is completed, the control unit 7 switches to the rinsing mode. The solvent rinsing unit 5 injects solvent through the pipe unit 3. The solvent circulates through the pipe unit 3, dissolving and removing the residual paint in the paint pipe 1 and the material tank 2. The solvent and residual paint are discharged into the recovery tank 8. After the solvent rinsing is completed, the control unit 7 switches to the drying mode. The gas purging unit 4 is activated, injecting gas into the pipe unit 3 to blow out the residual solvent and moisture in the paint pipe 1 and the material tank 2, and accelerating the drying process. This ensures that there is no pollution or moisture residue after cleaning, avoiding interference with the next round of production and ensuring the continuous and stable production process.

[0061] During this process, by switching between three modes—discharge, solvent rinsing, and gas drying—and utilizing the dual effects of gas purging and solvent rinsing, paint residue, solvent, and moisture in paint pipe 1 and material tank 2 can be thoroughly removed, ensuring no pollution or moisture residue. This will not affect the next round of production, avoid cross-contamination between different batches of paint, and thus improve the consistency of product quality and the stability of the production process. At the same time, this device reduces manual operation, lowers operational risks and the possibility of employees being exposed to harmful substances, and improves the safety of the working environment.

[0062] In this embodiment, the pipeline unit 3 includes a first pipeline 31, a second pipeline 32 and a third pipeline 33. The first pipeline 31 is connected to the feed pipeline 11, the second pipeline 32 is connected to the discharge pipeline 12, and the third pipeline 33 is connected to the first pipeline 31 and the second pipeline 32. In this embodiment, the pipelines are connected by welding or flanges, but not limited to welding.

[0063] The solvent rinsing unit 5 is located on the third pipe 33; the end of the third pipe 33 extends to the outside of the first pipe 31 and is connected to the gas purging unit 4; the end of the second pipe 32 extends to the outside of the third pipe 33 and is connected to the recovery tank 8.

[0064] The gas purging unit 4 includes a nitrogen pressure pump 41, which is connected to one end of the third pipe 33 extending out of the first pipe 31. The nitrogen pressure pump 41 is electrically connected to the control unit 7. The nitrogen pressure pump 41 can inject high-pressure nitrogen into the pipe to purge the pipe quickly and effectively. As an inert gas, nitrogen not only effectively cleans the inside of the pipe and removes residual solvents and coatings, but also avoids any pollution to the environment.

[0065] The solvent rinsing unit 5 includes a circulating pressure pump 51 and a heating device 52. The circulating pressure pump 51 and the heating device 52 are electrically connected to the control unit 7. The circulating pressure pump 51 and the heating device 52 are located on the third pipe 33, with the circulating pressure pump 51 located close to the first pipe 31 and the heating device 52 located close to the second pipe 32. In this embodiment, the heating device 52 is a container device with a heating function. The heating device 52 includes, but is not limited to, a water bath heating device 52. The heating device 52 is filled with solvent, which includes, but is not limited to, alcohol.

[0066] The heating device 52 can heat the alcohol to improve the cleaning effect of the solvent. After being heated, the alcohol is sent into the pipeline by the circulating pressure pump 51 for circulating rinsing. The circulating pressure pump 51 ensures that the flow pressure of the alcohol is guaranteed during the rinsing process, forming an effective rinsing flow and thoroughly removing the residual coating in the pipeline.

[0067] In this embodiment, the heating device 52 is equipped with a temperature sensor (not shown in the figure). The temperature sensor is electrically connected to the control unit 7. The temperature control range of the heating device 52 is 50-60℃, preferably 55℃. The temperature sensor can provide real-time feedback on the heating status of the solvent. The control unit 7 automatically adjusts the working status of the heating device 52 according to the sensor feedback signal to ensure that the alcohol is rinsed within the optimal temperature range, thereby improving the cleaning effect and avoiding overheating that could damage the equipment or waste energy, thus ensuring the stability and efficiency of the cleaning process.

[0068] In this embodiment, the valve assembly unit 6 includes:

[0069] The first valve 61 is located at the connection between the nitrogen pressure pump 41 and the third pipeline 33;

[0070] The second valve 62 is located on the side of the third pipeline 33 near the outlet of the circulating pressure pump 51;

[0071] The third valve 63 is located on the side of the first pipeline 31 near the feed pipeline 11;

[0072] The fourth valve 64 is located on the side of the feed pipe 11 away from the material tank 2;

[0073] The fifth valve 65 is located on the side of the discharge pipe 12 away from the material tank 2;

[0074] The sixth valve 66 is located on the side of the second pipeline 32 near the discharge pipeline 12;

[0075] The seventh valve 67 is located on the side of the second pipeline 32 near the recycling bin 8;

[0076] The eighth valve 68 is located on the side of the third pipe 33 near the inlet of the heating device 52;

[0077] In this embodiment, all eight valves are solenoid valves, and each valve is electrically connected to the control unit 7.

[0078] By configuring multiple solenoid valves, each positioned at a critical location, the system can regulate the flow of gas and solvents, switch between cleaning and recovery processes under different operating conditions, and achieve efficient operation and control of the pipeline system. Through the coordination of valves, the flow path of media in each pipeline can be effectively managed, improving the cleaning efficiency of the production line, avoiding unnecessary resource waste, and ensuring the recovery of coatings and solvents and environmental protection.

[0079] In this embodiment, the control unit 7 is a PLC controller 71, which controls the start and stop of the gas purging unit 4, the solvent flushing unit 5, and the valve group unit 6 according to a set mode; specifically:

[0080] In discharge mode, PLC controller 71 starts nitrogen pressure pump 41 and opens first valve 61, third valve 63, sixth valve 66, and seventh valve 67, while closing other valves. Nitrogen pressure pump 41 starts working, pressurizes the pipeline, and discharges the paint from feed pipeline 11, discharge pipeline 12 and material tank 2 into recycling tank 8. After the paint is emptied, nitrogen pressure pump 41 stops running.

[0081] After the discharge is completed, the PLC controller 71 switches to the flushing mode, starts the heating device 52 and the circulating pressure pump 51, opens the second valve 62, the third valve 63, the sixth valve 66 and the eighth valve 68, and closes the other valves. The alcohol is heated to 55°C by the heating device 52, and then pumped into the feed pipe 11, the discharge pipe 12 and the material tank 2 by the circulating pressure pump 51 for circulating flushing. After circulating for 15 minutes, the eighth valve 68 is closed and the seventh valve 67 is opened to discharge the alcohol-coating mixture in the pipe into the recovery tank 8. After the mixture is drained, the seventh valve 67 is closed and the eighth valve 68 is opened to re-inject clean alcohol into the heating device 52 for circulating flushing. After circulating for 15 minutes, the eighth valve 68 is closed and the seventh valve 67 is opened to discharge the alcohol-coating mixture in the pipe into the recovery tank 8. After the mixture is drained, the circulating pressure pump 51 stops running.

[0082] After rinsing is completed, the PLC controller 71 switches to the drying mode, starts the nitrogen pressure pump 41, opens the first valve 61, the third valve 63, the sixth valve 66, and the seventh valve 67, and closes the other valves. The nitrogen pressure pump 41 starts to work and blows the feed pipe 11, the discharge pipe 12 and the material tank 2 to dry the alcohol residue in the feed pipe 11, the discharge pipe 12 and the material tank 2. After cleaning, the nitrogen pressure pump 41 stops running.

[0083] After cleaning, close the first valve 61, the second valve 62, the third valve 63, the sixth valve 66, the seventh valve 67, and the eighth valve 68, and open the fourth valve 64 and the fifth valve 65, that is, only open the passage to the feed pipe 11 and the discharge pipe 12 leading to the material tank 2, so as to facilitate subsequent work.

[0084] Pipeline unit 3 is equipped with a pressure sensor (not shown in the figure). The pressure sensor is electrically connected to the control unit 7. In this embodiment, the pressure sensor can be installed on the first pipeline 31, the second pipeline 32, or the third pipeline 33. The pressure sensor can continuously detect pressure changes in the pipeline and transmit the data to the control unit 7. Based on the feedback from the pressure sensor, the control unit 7 automatically adjusts the working status of relevant valves or pumps to ensure that the system operates within a safe pressure range, thereby optimizing the flushing or purging process and preventing equipment damage or efficiency reduction caused by abnormal pressure, thus improving the stability, safety, and operational efficiency of the entire system.

[0085] Pipeline unit 3 is also equipped with a pressure reducing valve (not shown in the figure). The pressure reducing valve is electrically connected to the control unit 7. In this embodiment, the pressure reducing valve can be installed on the first pipeline 31, the second pipeline 32, or the third pipeline 33. The pressure sensor feeds back the pressure in the pipeline to the control unit 7. If the pressure exceeds the pressure threshold, the control unit 7 will issue a command to the pressure reducing valve to automatically adjust the pressure in the pipeline, ensuring that the pressure is maintained within a safe and reasonable range, preventing damage to the pipeline or equipment due to excessive pressure, thereby optimizing the fluid transmission and cleaning effect in the pipeline, and improving the stability, safety, and reliability of the system.

[0086] The implementation principle of this application embodiment is as follows: The cleaning device of this application uses inert gas nitrogen to purge and discharge the pipeline, removing residual paint, solvents and other substances from the inside of the pipeline, and provides an oxygen-free environment for subsequent solvent heating and circulating rinsing through the inert properties of nitrogen; this design effectively avoids the potential danger caused by the reaction of oxygen and solvent, and provides safety assurance for the solvent heating and circulating rinsing process; at the same time, through nitrogen purging, the residues in the paint pipeline 1 can be thoroughly removed, ensuring the efficiency and thoroughness of subsequent cleaning.

[0087] Compared with traditional cleaning methods, this device does not require disassembly of pipes and material tank 2, thereby reducing manual operation, improving work efficiency, and significantly reducing the risk of pollution during installation. Through an automated control system, it not only saves labor costs but also optimizes the cleaning process and improves the timeliness of cleaning the paint pipe 1. The contact between employees and hazardous chemicals is effectively reduced, thereby ensuring the safety of operators and reducing operational risks.

[0088] In addition, the device's multi-stage cleaning modes include inert gas purging, solvent heating rinsing, and gas drying. The efficient switching between these multi-stage modes can greatly improve the cleaning effect, reduce material residue, and thus avoid cross-contamination between different batches of coatings. This enhances the stability and efficiency of the cleaning process, while ensuring the continuous and stable operation of the production line and improving the consistency of product quality.

[0089] 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. A device for cleaning a paint pipeline and a paint tank, said paint pipeline (1) comprising an inlet pipeline (11) and an outlet pipeline (12) communicating with said paint tank (2); characterized in that: The cleaning device includes: The pipeline unit (3) is connected to the feed pipeline (11) and the discharge pipeline (12) to form a circulation path; Gas purging unit (4) is connected to the pipeline unit (3); Solvent rinsing unit (5) is connected to the pipeline unit (3); A valve assembly unit (6) is installed on the pipeline unit (3) and the coating pipeline (1) to switch the flow direction of the medium in the pipeline; The control unit (7) is used to control the start and stop of the gas purging unit (4), the solvent flushing unit (5) and the valve group unit (6) to achieve the switching of discharge mode, flushing mode and drying mode.

2. The paint conduit and canister cleaning apparatus of claim 1, wherein: It also includes a recycling bin (8) which is connected to the pipeline unit (3).

3. The paint conduit and canister cleaning apparatus of claim 2, wherein: The pipeline unit (3) includes: The first pipe (31) is connected to the feed pipe (11); The second pipe (32) is connected to the discharge pipe (12); The third pipe (33) connects the first pipe (31) and the second pipe (32); The solvent rinsing unit (5) is located on the third pipe (33), the third pipe (33) is connected to the gas purging unit (4), and the second pipe (32) is connected to the recycling tank (8).

4. The paint conduit and canister cleaning apparatus of claim 3, wherein: The valve assembly unit (6) includes: The first valve (61) is located at the connection between the gas purging unit (4) and the third pipe (33); The second valve (62) is located on the side of the third pipe (33) near the outlet of the solvent rinsing unit (5); The third valve (63) is located on the side of the first pipe (31) near the feed pipe (11); The fourth valve (64) is located on the side of the feed pipe (11) away from the material tank (2); The fifth valve (65) is located on the side of the discharge pipe (12) away from the material tank (2); The sixth valve (66) is located on the side of the second pipe (32) near the discharge pipe (12); The seventh valve (67) is located on the side of the second pipe (32) near the recycling bin (8); The eighth valve (68) is located on the side of the third pipe (33) near the inlet of the solvent rinsing unit (5).

5. The paint conduit and canister cleaning apparatus of claim 4, wherein: The control unit (7) is configured to: The discharge mode is as follows: the gas purging unit (4) is turned on, the first valve (61), the third valve (63), the sixth valve (66), the seventh valve (67) are opened, and the other valves are closed; The flushing mode is as follows: the solvent flushing unit (5) is turned on, the second valve (62), the third valve (63), the sixth valve (66), and the eighth valve (68) are opened, and the other valves are closed; The drying mode is as follows: the gas purging unit (4) is turned on, the first valve (61), the third valve (63), the sixth valve (66), and the seventh valve (67) are opened, and the other valves are closed.

6. The paint conduit and canister cleaning apparatus of claim 1, wherein: The gas purging unit (4) includes a nitrogen pressure pump (41).

7. The paint conduit and canister cleaning apparatus of claim 1, wherein: The solvent rinsing unit (5) includes a circulating pressure pump (51) and a heating device (52). The heating device (52) is filled with solvent and is used to heat the solvent. The heated solvent is then sent into the pipeline for rinsing by the circulating pressure pump (51).

8. The paint conduit and canister cleaning apparatus of claim 7, wherein: The heating device (52) is equipped with a temperature sensor, which is electrically connected to the control unit (7).

9. The paint conduit and canister cleaning apparatus of claim 1, wherein: The pipeline unit (3) is equipped with a pressure sensor, which is electrically connected to the control unit (7).

10. The paint conduit and canister cleaning apparatus of claim 9, wherein: The pipeline unit (3) is also equipped with a pressure reducing valve, which is electrically connected to the control unit (7).

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