A branch bead running device for a paint supply system
By using a branch pipe ball bearing device in conjunction with compressed air, the problems of long cleaning time and high solvent consumption in the branch pipes are solved, achieving a highly efficient and low-cost paint color change process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING HINSONGYICHANG MACHINERY & ELECTRIC ENG
- Filing Date
- 2023-06-21
- Publication Date
- 2026-06-05
AI Technical Summary
In existing technologies, cleaning branch pipes takes a long time and consumes a lot of cleaning solvent, resulting in high cleaning costs and making it difficult to effectively prevent the mixing of different colors of paint during color changes.
A ball bearing device is used in the branch pipe, which replaces the distribution station with a transmitter and receiver. The ball bearing moves back and forth in the paint branch pipe, and the combined use of compressed air and cleaning solvent achieves scraping and cleaning of the branch pipe.
It significantly improves cleaning efficiency, reduces cleaning time and solvent consumption, lowers cleaning costs, and ensures cleanliness during paint color change.
Smart Images
Figure CN116689191B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of paint supply systems, and more particularly to a branch pipe ball bearing device for paint supply systems. Background Technology
[0002] A typical paint spraying system includes a paint bucket, a pump module, a main pipeline, distribution stations, branch pipelines, an atomizer, and an electronic control module. One end of the main pipeline connects to the paint bucket, while the other end is either a blind end or a loop connection to the pump module. The pump module is installed between the main pipeline and the paint bucket. Several distribution stations are located along the extension direction of the main pipeline. Each branch pipeline corresponds to a distribution station, with one end connected to a distribution station and the other end connected to an atomizer. The electronic control module controls the spraying process. During spraying, the pump module delivers paint from the paint bucket to the main pipeline. The paint flows along the extension direction of the main pipeline. When the main pipeline is full, the distribution station directs some of the paint into the branch pipelines. The pump module continues to supply paint to the main pipeline, while the paint entering the branch pipelines flows along the branch pipelines to the atomizer, and is then sprayed out by the atomizer, thus completing the paint spraying process.
[0003] During the spraying process, different colors of paint are often required, necessitating paint color changes. When changing colors, different colors of paint flow into the main pipeline. To minimize mixing, residual paint in the main pipeline is typically cleaned before the new paint of the desired color is pumped into the pipeline.
[0004] In order to reduce the mixing of paint with residual paint in the branch pipes when the paint reaches the branch pipes, which would affect the color change effect, Chinese invention patent with publication number CN114100918A discloses a rapid paint color change system with a multi-pipe distribution station, which can clean the paint in the branch pipes.
[0005] However, when cleaning branch pipes, the entire branch pipe needs to be filled with cleaning solvent, and multiple cleanings are required to remove the paint from the inner wall of the branch pipe. The cleaning time is long and a lot of cleaning solvent is consumed, resulting in high cleaning costs. Summary of the Invention
[0006] To expedite the cleaning of branch pipes, reduce solvent consumption, and lower cleaning costs, this application provides a branch pipe ball bearing device for a paint supply system.
[0007] The technical solution provided in this application for a branch pipe ball bearing device for a paint supply system is as follows:
[0008] A branch pipe ball bearing device for a paint supply system, comprising:
[0009] The transmitter, located near one end of the main pipeline, has a first paint inlet on one side for communication with the main pipeline and a first paint outlet on the other side. Inside the transmitter, there is a first connecting channel and a bypass channel connecting the first paint inlet and the first paint outlet. Inside the transmitter, there is a control component for controlling the paint to flow through the first connecting channel and / or through the bypass channel. On one side of the transmitter, there is a solution inlet communicating with the first connecting channel.
[0010] The receiver is mounted on a robotic arm that moves the atomizer. It has a second paint inlet on one side for communicating with the first paint outlet and a second paint outlet on the other side for communicating with the atomizer. The receiver has a second connecting channel inside that connects the second paint inlet and the second paint outlet. The receiver also has a second waste liquid outlet and a second air inlet that communicate with the second paint outlet.
[0011] A paint branch pipe is connected between the first paint outlet and the second paint inlet;
[0012] A ball bearing, placed at the first paint outlet and located between the first connecting channel and the bypass channel, has a diameter consistent with the inner diameter of the paint branch pipe. It can reach the second paint inlet through the paint branch pipe under thrust. The diameter of the second paint inlet is larger than the diameter of the ball bearing. Paint in the paint branch pipe can reach the second connecting channel from between the ball bearing and the side wall of the second paint inlet. When compressed air is introduced into the second air inlet, the compressed air pushes the ball bearing from the second paint inlet along the paint branch pipe to the first paint outlet.
[0013] By adopting the above technical solution, before use, the transmitter is directly installed near the main pipe, and the first paint inlet is connected to the main pipe. The receiver is installed on the robotic arm that moves the atomizer, and the second paint outlet is connected to the atomizer. During use, the paint in the main pipe reaches the first paint inlet and then flows along the first connecting pipe and bypass channel to the first paint outlet. It then reaches the second paint inlet of the receiver through the paint branch pipe. Simultaneously, the paint pushes the ball at the first paint outlet to the second paint inlet. The paint then flows from between the ball and the side wall of the second paint inlet to the second connecting channel, and then along the second connecting channel to the second paint outlet, finally reaching the atomizer and being sprayed out. The paint that first reaches the first paint outlet in the bypass channel lubricates the ball. When the ball is pushed to the paint branch pipe, the paint in the bypass channel and the first connecting pipe mixes together to propel the ball. When a paint color change is needed, compressed air is introduced into the second air inlet. This compressed air then travels through the second connecting channel to the second paint inlet, pushing a ball bearing at the second paint inlet to the first paint outlet. As the compressed air moves the ball bearing, its diameter matches the inner diameter of the paint branch pipe, effectively scraping away the paint and achieving initial cleaning. Next, cleaning solvent is introduced into the solution inlet, causing the solvent to push the ball bearing again and scrape away the paint from the branch pipe. By having the ball bearing reciprocate once within the branch pipe, it scrapes twice, resulting in a more thorough cleaning. Furthermore, the compressed air also dries the branch pipe as it propels the ball bearing from the receiving station to the transmitting station. Because cleaning and scraping can occur simultaneously, cleaning efficiency is greatly improved, accelerating the cleaning time for the branch pipe. Additionally, the cleaning solvent can be reused during the ball bearing's reciprocating motion, reducing solvent consumption and lowering cleaning costs.
[0014] Optionally, the control component includes a first switching valve installed on the first connection channel for controlling the opening and closing of the first connection channel, the first switching valve being configured to open after a set time when paint flows into the bypass channel.
[0015] By adopting the above technical solution, the amount of paint near the branch pipe of the ball bearing can be controlled, so that the paint flowing in front of the ball bearing can fully lubricate the ball bearing.
[0016] Optionally, the diameter of the bypass channel is smaller than the diameter of the first connecting channel.
[0017] By adopting the above technical solution, the ball can be smoothly pushed to move when the first connecting channel is opened.
[0018] Optionally, a first proximity switch is installed on the side wall of the first paint outlet.
[0019] By adopting the above technical solution, the position of the ball bearing can be detected to determine whether the ball bearing has reached the set position, thereby determining whether the paint has been completely recycled.
[0020] Optionally, the solution inlet includes a first air inlet and a cleaning solvent inlet on the transmitter. A second switching valve for controlling the opening and closing of the first air inlet is installed at the first air inlet, and a third switching valve for controlling the opening and closing of the cleaning solvent inlet is installed at the cleaning solvent inlet.
[0021] By adopting the above technical solution, when the branch pipe needs to be cleaned, the second and third switching valves can be opened simultaneously, allowing air and cleaning agent to be introduced into the branch pipe. This mixture of air and cleaning agent cleans the branch pipe. After a certain amount of the mixture has passed through, the third switching valve can be closed, and compressed gas can be directly introduced into the first air inlet. The compressed gas drives the ball bearing, further saving cleaning solvent.
[0022] Optionally, the receiver is provided with a paint return port that communicates with the second waste liquid outlet and the air inlet, and a return pipe is connected between the second paint outlet and the paint return port. The return pipe is used to connect to the atomizer on the robotic arm.
[0023] By adopting the above technical solution, it is ensured that the space between the receiver and the atomizer is filled with paint, and the gas located between the receiver and the atomizer can be discharged from the second waste liquid outlet.
[0024] Optionally, a second proximity switch is installed on the side wall of the second paint inlet.
[0025] By adopting the above technical solution, the degree of paint filling can be judged. When the second proximity switch detects that the ball has reached the second paint inlet, the second waste liquid outlet can be closed after waiting for a set time to ensure that the paint filling is completed and to accurately judge the degree of paint filling.
[0026] Optionally, the transmitter is provided with a first waste liquid outlet, which is connected to the first connecting channel.
[0027] By adopting the above technical solution, when the ball moves from the receiving station to the transmitting station, the residual waste liquid in the branch pipe will be discharged from the first waste liquid outlet.
[0028] In summary, this application includes at least one of the following beneficial technical effects:
[0029] 1. This application eliminates the existing distribution station and adds a transmitter and receiver to replace it. A ball bearing is added between the transmitter and receiver, which pushes the paint ball to thoroughly recover the paint in the paint branch pipe. When cleaning the paint branch pipe, the ball bearing can also scrape the paint in the paint branch pipe as it moves back and forth, resulting in higher cleaning efficiency. During cleaning, only a certain amount of cleaning solvent needs to be injected in front of the ball bearing. The ball bearing pushes the cleaning solvent to clean the paint branch pipe. Only a small amount of cleaning solvent is needed, which speeds up the cleaning time of the paint branch pipe and reduces the consumption of cleaning solvent, thus reducing cleaning costs.
[0030] 2. This application sets the diameter of the bypass channel to be smaller than the diameter of the first connecting channel, so that when paint or cleaning solvent is introduced, the paint and cleaning solvent can be introduced into the side of the ball bearing near the paint branch pipe through the bypass channel, so as to lubricate the ball bearing, or to push the cleaning solvent forward through the ball bearing to clean the paint branch pipe.
[0031] 3. The setting of the first proximity switch and the second proximity switch can detect whether the paint branch pipe is full of paint and whether the paint in the paint branch pipe has been completely recycled, which facilitates subsequent operations. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of the overall structure of this application.
[0033] Figure 2 This is a schematic diagram of the overall hydraulic circuit of this application.
[0034] Figure 3 This is a schematic diagram to illustrate the structure of the obstacle avoidance passage.
[0035] Explanation of reference numerals in the attached diagram: 1. Transmitter; 11. First paint inlet; 12. First paint outlet; 13. First connecting channel; 14. Bypass channel; 16. Solution inlet; 161. First air inlet; 162. Cleaning solvent inlet; 163. Second switching valve; 164. Third switching valve; 17. First waste liquid outlet; 171. Sixth switching valve; 18. First proximity switch; 2. Receiver; 21. Second paint inlet; 22. Second paint outlet; 23. Second connecting channel; 24. Second air inlet; 241. Fourth switching valve; 25. Paint return port; 26. Return pipe; 27. Second waste liquid outlet; 271. Fifth switching valve; 28. Second proximity switch; 29. Clearance channel; 3. Paint branch pipe; 4. Ball bearing; 5. Control component; 51. First switching valve; 6. Paint supply valve. Detailed Implementation
[0036] The following is in conjunction with the appendix Figure 1-3This application will be described in further detail.
[0037] This application discloses a branch pipe ball bearing device for a paint supply system. (Refer to...) Figure 1 and Figure 2 The branch pipe ball bearing device for the paint supply system includes a transmitter 1 for installation near one end of the main pipe, a receiver 2 for installation near the atomizer, a paint branch pipe 3 connecting the transmitter 1 and the receiver 2, and a ball bearing 4 capable of reciprocating between the transmitter 1, the paint branch pipe 3, and the receiver 2.
[0038] The transmitter 1 has a first paint inlet 11 on its outer wall for communication with the main pipeline. By connecting the first paint inlet 11 to the main pipeline, the paint in the main pipeline can reach the transmitter 1. The transmitter 1 has a first paint outlet 12 on its outer wall. A paint branch pipe 3 is fixed to the side wall of the transmitter 1 and its interior is connected to the first paint outlet 12. Inside the transmitter 1, there is a first connecting channel 13 and a bypass channel 14 that connect the first paint inlet 11 and the first paint outlet 12. A first placement space for inserting the roller ball 4 is formed at the first paint outlet 12. The first placement space is located between the first connecting channel 13 and the bypass channel 14. Inside the transmitter 1, there is a control component 5 that controls the paint from the first paint inlet 11 to reach the first paint outlet 12 from the first connecting channel 13 or controls the paint from the first paint inlet 11 to reach the first paint outlet 12 from the bypass channel 14.
[0039] Reference Figure 2 The control component 5 includes a first switching valve 51 installed on the first connecting channel 13, which controls the opening and closing of the first connecting channel 13. In use, the first switching valve 51 can be closed, allowing the paint entering the first paint inlet 11 to first pass through the bypass channel 14 to the side of the ball bearing 4 closest to the paint branch pipe 3. Then, the first switching valve 51 can be opened, allowing the paint to pass through the first connecting channel 13 to the end of the ball bearing 4 furthest from the paint branch pipe 3, pushing the ball bearing 4 towards the paint branch pipe 3. At this point, the paint flowing from the bypass channel 14 and the paint flowing from the first connecting channel 13 will converge and jointly push the ball bearing 4 within the paint branch pipe 3. The paint flowing through the bypass channel 14 to the side of the ball bearing 4 facing the paint branch pipe 3 can lubricate the ball bearing 4, reducing frictional damage caused by its movement within the paint branch pipe 3.
[0040] The diameter of the bypass channel 14 can be set to be smaller than the diameter of the first connecting channel 13, so that the speed of the paint ball 4 flowing towards the paint branch pipe 3 is slower. By controlling the time it takes for the paint to flow into the bypass channel 14, the amount of paint flowing to the side of the paint ball 4 towards the paint branch pipe 3 can be controlled.
[0041] Meanwhile, the first switching valve 51 is configured to open after a set time when the paint flows into the bypass channel 14. Specifically, a paint supply valve 6 is installed on the pipe connecting the main pipe and the first paint inlet 11 to control the flow of paint from the main pipe to the first paint inlet 11. The paint supply valve 6 is connected to the first switching valve 51 via a PLC controller. When the paint supply valve 6 opens, the paint will flow from the first paint inlet 11 through the bypass channel 14 to the side of the ball bearing 4 facing the paint branch pipe 3. At the same time, the timing device in the PLC controller starts and controls the first switching valve 51 to open after a set time, thereby controlling the amount of paint injected into the side of the ball bearing 4 facing the paint branch pipe 3.
[0042] Reference Figure 1 and Figure 2 The receiver 2 has a second paint inlet 21 on its outer wall, which communicates with the paint branch pipe 3. The end of the paint branch pipe 3 away from the transmitter 1 is fixed to the receiver 2, and the interior of the paint branch pipe 3 communicates with the second paint inlet 21. A second paint outlet 22 for communication with the atomizer is also provided on the side wall of the receiver 2. A second connecting channel 23 connecting the second paint inlet 21 and the second paint outlet 22 is provided inside the receiver 2. In use, the end of the paint branch pipe 3 away from the transmitter 1 is directly installed on the receiver 2, making the paint branch pipe 3 communicate with the second paint inlet 21. Then, the atomizer is connected to the receiver 2, making the atomizer communicate with the second paint outlet 22. When paint supply is needed, the paint supply valve 6 between the main pipe and the first paint inlet 11 is opened. When the paint in the main pipe enters the first paint inlet 11, it will flow along the bypass channel 14 to the side of the ball bearing 4 facing the paint branch pipe 3. Simultaneously, when the paint supply valve 6 is opened, the PLC controller starts timing and controls the first switching valve 51 to open when the timer reaches the set time. At this time, the paint that reaches the first paint inlet 11 will also reach the side of the ball bearing 4 away from the paint branch pipe 3 through the first connecting channel 13, and push the ball bearing 4 to slide towards the paint branch pipe 3 until the ball bearing 4 reaches the second paint inlet 21.
[0043] Reference Figure 3 At this time, in order to ensure that the paint can smoothly pass over the ball bearing 4 and reach the second paint outlet 22, the diameter of the second paint inlet 21 is designed to be larger than the diameter of the ball bearing 4. The second connecting channel 23 is connected to one side of the second paint inlet 21, so that when the ball bearing 4 reaches the end of the second paint inlet 21 away from the paint branch pipe 3, a clearance channel 29 is formed between the ball bearing 4 and the inner wall of the second paint inlet 21 for the paint to flow through. The paint in the paint branch pipe 3 will reach the second connecting channel 23 through the clearance channel 29 and flow from the second paint outlet 22 to the atomizer to achieve paint supply.
[0044] Reference Figure 1 and Figure 2A second air inlet 24 is also provided on the side wall of receiver 2, and a fourth switching valve 241 for controlling the opening and closing of the second air inlet 24 is installed on receiver 2. A paint return port 25 communicating with the second air inlet 24 is provided on the side wall of receiver 2. A return pipe 26 is connected between the second paint outlet 22 and the paint return port 25. The second air inlet 24 is connected to the second connecting channel 23 through the return pipe 26, and the atomizer is connected to the return pipe 26. When it is necessary to change the paint, compressed air is directly connected at the second air inlet 24. The compressed air will reach the second paint inlet 21 through the second connecting channel 23, and first reach the end of the ball bearing 4 away from the paint branch pipe 3, pushing the ball bearing 4 closer to the paint branch pipe 3. Understandably, when compressed air reaches the side of the ball bearing 4 furthest from the paint branch pipe 3, part of the compressed air will flow from the bypass channel 29 to the paint branch pipe 3, while the other part will push the ball bearing 4 towards the paint branch pipe 3. Until the ball bearing 4 reaches the paint branch pipe 3, its outer wall will be in contact with the inner wall of the paint branch pipe 3. All the compressed air will then push the ball bearing 4 together within the paint branch pipe 3 until it reaches the first paint outlet 12, located between the first connecting channel 13 and the bypass channel 14. The compressed air will then flow out from the bypass channel 14. During the movement of the ball bearing 4, the paint is also recycled.
[0045] Reference Figure 1 and Figure 2 A solution inlet 16 is also provided on the side wall of the transmitter 1. The solution inlet 16 includes a first air inlet 161 and a cleaning solvent inlet 162. A second switching valve 163 for controlling the opening and closing of the first air inlet 161 and a third switching valve 164 for controlling the opening and closing of the cleaning solvent inlet 162 are installed on the transmitter 1. The first air inlet 161 is connected to external compressed gas, and the cleaning solvent inlet 162 is connected to external cleaning agent. When it is necessary to clean the paint branch pipe 3, the paint supply valve 6 is closed directly, and the third switching valve 164 is opened, so that the cleaning agent reaches the side of the ball bearing 4 facing the paint branch pipe 3. Then, the first switching valve 51 and the second switching valve 163 are opened, so that the mixture of cleaning agent and air reaches the side of the ball bearing 4 away from the paint branch pipe 3, and pushes the ball bearing 4 to move towards the paint branch pipe 3. The ball bearing 4 can be moved by compressed gas, and the ball bearing 4 pushes a small amount of solvent to move in the paint branch pipe 3, thereby cleaning the paint branch pipe 3.
[0046] A second waste liquid outlet 27 is provided on the side wall of receiver 2. The second waste liquid outlet 27 is connected to the return pipe 26, and a fifth switch valve 271 is installed on receiver 2 to control the opening and closing of the second waste liquid outlet 27. When the ball bearing 4 is pushed to the second paint inlet 21, as external compressed gas continues to enter the first air inlet 161, the agent pushed by the ball bearing 4 will also reach the second waste liquid outlet 27 through the return pipe 26 and be discharged from the second waste liquid outlet 27.
[0047] A first waste liquid outlet 17 is provided on the side wall of the transmitter 1, and the first waste liquid outlet 17 is connected to the bypass channel 14. A sixth switching valve 171 is installed on the transmitter 1 to control the opening and closing of the first waste liquid outlet 17. When the ball bearing 4 pushes the agent to the receiver 2, the fourth switching valve 241 is opened, and external compressed gas will enter from the second air inlet 24 and push the ball bearing 4 towards the transmitter 1 until the ball bearing 4 reaches the first paint outlet 12. During the process of the ball bearing 4 moving towards the transmitter 1, the air input from the second air inlet 24 also dries the paint branch pipe 3, and the impurities remaining in the paint branch pipe 3 can be discharged from the first waste liquid outlet 17, thereby cleaning the paint branch pipe 3.
[0048] Reference Figure 2 To achieve fully automated paint replacement and cleaning, a first proximity switch 18 is installed inside the first paint outlet 12, located on the side wall of the first paint outlet 12, to detect whether the ball bearing 4 has moved from the receiver 2 to the transmitter 1. Simultaneously, a second proximity switch 28 is installed inside the second paint inlet 21, located on the side wall of the second paint inlet 21, to detect whether the ball bearing 4 has moved from the transmitter 1 to the receiver 2. The first and second proximity switches 18, as well as the second, third, fourth, and fifth switching valves 163, 164, 241, and 271, are all connected to a PLC controller for automated control.
[0049] Of course, the first proximity switch 18 can also be a first contact switch, in which case the first contact switch is installed at the end of the first paint outlet 12 away from the paint branch pipe 3; the second proximity switch 28 can also be a second contact switch, in which case the second contact switch is installed at the end of the second paint inlet 21 away from the paint branch pipe 3.
[0050] The implementation principle of a branch pipe ball bearing device for a paint supply system according to an embodiment of this application is as follows: When paint supply is required, the paint supply valve 6 is opened. The paint in the main pipe reaches the side of the ball bearing 4 facing the paint branch pipe 3 through the first paint inlet 11 and bypass channel 14. After the paint supply valve 6 has been open for a set time, the first switch valve 51 is opened. At this time, the paint reaches the side of the ball bearing 4 away from the paint branch pipe 3 through the first connecting channel 13 and pushes the ball bearing 4 to move until the ball bearing 4 reaches the second paint inlet 21 and abuts against the second proximity switch 28. The paint then reaches the second connecting channel 23 through the avoidance channel 29 and reaches the second waste liquid outlet 27 through the return pipe 26, so that the waste gas in the return pipe 26 is discharged. At the same time, when the second proximity switch 28 detects the ball bearing 4, the PLC controller starts timing and controls the fifth switch valve 271 to close when the timing reaches the set value. At this time, the return pipe 26 is also filled with paint, and there will be no waste gas affecting the normal painting. When paint replacement is needed, first open the fourth switch valve 241. External compressed gas reaches the second connection channel 23 through the second control inlet and pushes the ball bearing 4 towards the transmitter 1 until the ball bearing 4 reaches the first paint outlet 12 and abuts against the second proximity switch 28. When the second proximity switch 28 detects that the ball bearing 4 has reached the first paint outlet 12, the PLC controller starts timing and controls the paint valve to close after the timing set value, completing the paint recycling process.
[0051] When the paint branch pipe 3 needs cleaning, the cleaning mode is activated, and the second switch valve 163, the third switch valve 164, and the fifth switch valve 271 open. This allows the mixture of air and chemicals to reach the side of the ball bearing 4 facing the paint branch pipe 3 from the bypass channel 14. When the third switch valve 164 opens, the PLC controller starts timing. After the set timing time, the first switch valve 51 opens, and compressed gas reaches the side of the ball bearing 4 away from the paint branch pipe 3, pushing the ball bearing 4 towards the receiver 2 until it reaches the second paint inlet 21. The mixture of gas and chemicals is also discharged from the second waste liquid outlet 27. When the second proximity switch 28 detects that the ball bearing 4 has reached the second paint inlet 21, the PLC controller starts timing. After the set timing time, it controls the second switch valve 163, the third switch valve 164, and the fifth switch valve 271 to close, while simultaneously controlling the fourth switch valve 241 and the sixth switch valve 171 to open. Compressed gas enters from the second air inlet 24 and pushes the ball bearing 4 towards the transmitter 1. Until the ball bearing 4 reaches the first paint outlet 12, the first proximity switch 18 detects the ball bearing 4, the PLC controller starts timing, and when the timing reaches the set time, it controls the sixth switch valve 171 and the fourth switch valve 241 to stop. The solvent in the paint branch pipe 3 will be discharged from the first waste liquid outlet 17 by the ball bearing 4, completing the cleaning work of the paint branch pipe 3.
[0052] 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 ball bearing device for a branch pipe of a paint supply system, characterized in that, include: The transmitter (1) is located at one end near the main pipeline. It has a first paint inlet (11) on one side for communicating with the main pipeline and a first paint outlet (12) on the other side. The transmitter (1) has a first connecting channel (13) and a bypass channel (14) connecting the first paint inlet (11) and the first paint outlet (12) inside. The transmitter (1) is equipped with a control component (5) for controlling the flow of paint from the first connecting channel (13) and / or from the bypass channel (14). The transmitter (1) has a solution inlet (16) on one side communicating with the first connecting channel (13). The control component (5) includes a first switching valve (51) installed on the first connecting channel (13) for controlling the opening and closing of the first connecting channel (13). The first switching valve (51) is configured to open after a set time when the paint flows to the bypass channel (14). The receiver (2) is installed on the robotic arm that drives the atomizer to move. It has a second paint inlet (21) on one side for communicating with the first paint outlet (12) and a second paint outlet (22) on the other side for communicating with the atomizer. The receiver (2) has a second connecting channel (23) inside for communicating with the second paint inlet (21) and the second paint outlet (22). The receiver (2) has a second waste liquid outlet (27) and a second air inlet (24) communicating with the second paint outlet (22). A paint branch pipe (3) is connected between the first paint outlet (12) and the second paint inlet (21); The ball bearing (4) is placed at the first paint outlet (12) and located between the first connecting channel (13) and the bypass channel (14). Its diameter is the same as the inner diameter of the paint branch pipe (3). It can reach the second paint inlet (21) through the paint branch pipe (3) under the action of thrust. The diameter of the second paint inlet (21) is larger than the diameter of the ball bearing (4). The paint in the paint branch pipe (3) can reach the second connecting channel (23) from between the ball bearing (4) and the side wall of the second paint inlet (21). When compressed air is introduced into the second air inlet (24), the compressed air pushes the ball bearing (4) from the second paint inlet (21) along the paint branch pipe (3) to the first paint outlet (12).
2. The branch pipe ball bearing device of the paint supply system according to claim 1, characterized in that, The diameter of the bypass channel (14) is smaller than the diameter of the first connecting channel (13).
3. The branch pipe ball bearing device of the paint supply system according to claim 1, characterized in that, A first proximity switch (18) is installed on the side wall of the first paint outlet (12).
4. The branch pipe ball bearing device of the paint supply system according to claim 1, characterized in that, The solution inlet (16) includes a first air inlet (161) opened on the transmitter (1) and a cleaning solvent inlet (162) opened on the transmitter (1). A second switching valve (163) for controlling the opening and closing of the first air inlet (161) is installed at the first air inlet (161), and a third switching valve (164) for controlling the opening and closing of the cleaning solvent inlet (162) is installed at the cleaning solvent inlet (162).
5. The branch pipe ball bearing device of the paint supply system according to claim 1, characterized in that, The receiver (2) is provided with a paint return port (25) that communicates with the second air inlet (24). A return pipe (26) is connected between the second paint outlet (22) and the paint return port (25). The return pipe (26) is used to connect to the atomizer on the robotic arm.
6. The branch pipe ball bearing device of the paint supply system according to claim 1, characterized in that, A second proximity switch (28) is installed on the side wall of the second paint inlet (21).
7. The branch pipe ball bearing (4) device for the paint supply system according to claim 1, characterized in that, The transmitter (1) is provided with a first waste liquid outlet (17), which is connected to the first connecting channel (13).