A circulation device with a branch pipe for automotive painting

Abstract

The utility model relates to the technical field of automobile manufacturing equipment discloses a kind of branch pipe circulating equipment for automobile painting, including paint supply module, the top of paint supply module is equipped with pneumatic control valve assembly, the pneumatic control valve assembly is used to control the flow of passage in pipeline, the top of paint supply module is equipped with back pressure generating assembly, and the back pressure generating assembly is used to control backflow pressure;The inside of paint supply module is equipped with circulating pump, the top of paint supply module is equipped with spray house, the outer wall of spray house is equipped with main supply pipe, and the outside of spray house is equipped with main return pipe.In the utility model, when not working, close pneumatic control ball valve, divide main supply pipe and main return pipe, realize branch pipe circulation flow, when recovering coating, open pneumatic control ball valve, main supply pipe and main return pipe can be communicated, and coating in main supply pipe and main return pipe is recovered, waste liquid discharge is reduced, cleaning time is shortened, and solvent consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing equipment technology, and in particular to a circulating device with branch pipes for automobile painting. Background Technology

[0002] Automotive painting is one of the four major processes in automobile production. The paint used in automotive painting is a mixture that is prone to sedimentation. It needs to circulate continuously in pipelines to prevent the paint from settling and affecting the painting quality. Automotive painting is generally completed using a centralized paint supply system. The centralized paint supply system on site mainly includes several painting stations (operating positions), paint supply modules for supplying paint to each painting station, and control units for controlling the working status of the paint supply modules. The paint supply module includes a circulation tank for storing paint, a circulation pump connected to the outlet end of the circulation tank, and branch pipelines connected to the circulation pump. During operation, the circulation pump outputs paint from the circulation tank and delivers it to each painting station through the branch pipelines.

[0003] A search revealed Chinese Patent Publication No. CN112354750B, which discloses a dual-pipe circulating paint supply system and its control method for automotive painting. The system includes several painting stations, a paint supply module, and a control unit. The paint supply module includes a circulating tank and a circulating pump; it also includes first and second pipes, a pipeline control component, and branch pipes; the first and second pipes are equal-diameter pipes capable of carrying ball bearings; the upstream interfaces of the first and second pipes are respectively connected to the outlet end of the circulating pump, and the downstream interfaces are respectively connected to the return end of the circulating tank; the branch pipes have a feed end for supplying paint to the painting stations, and the supply end of the branch pipe is connected to the first pipe, and the return end is connected to the second pipe. The invention also discloses a corresponding control method. The dual-pipe circulating paint supply system of this invention can circulate the paint in the branch pipes and can use a ball bearing to recover the paint, which can improve the utilization rate of paint and reduce the amount of waste liquid discharged. However, in the prior art, when the paint in the pipes is not in use and needs to be discharged, the paint recovery rate during pipe cleaning is low, and the solvent consumption for pipe cleaning is large, which cannot meet the usage requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a circulating device with branch pipes for automotive painting, which aims to improve the problems in the prior art where the paint in the pipes is discharged when not in use, resulting in low paint recovery rate during pipe cleaning, high solvent consumption during pipe cleaning, and inability to meet usage requirements.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a circulating equipment with branch pipes for automotive painting, comprising a paint supply module, wherein a back pressure generating component is installed inside the paint supply module to control the return pressure; a circulating pump and a spray booth are installed inside the paint supply module; a main supply pipe and a main return pipe are installed on the outer wall of the spray booth; a pneumatic control valve assembly is installed between the main supply pipe and the main return pipe to control the connection between the end of the main supply pipe and the top of the main return pipe. Multiple spraying stations are installed on the inner wall of the spray booth; multiple branch pipes are connected to the outer wall of the main supply and return pipes; a circulating tank is installed inside the paint supply module; a connecting pipe is connected to the output end of the circulating pump; an upstream valve is installed at the top of the main pipe; a downstream valve is installed at the end of the main return pipe; a ball bearing receiver is installed at the bottom of the downstream valve; and a ball bearing launcher is installed at the top of the upstream valve.

[0006] The above technical solution involves: a circulating pump drawing paint from the circulating tank via connecting pipe two; the paint then being transported to each spraying station via connecting pipe one and the main supply pipe; the output flow rate being adjusted by frequency converter or throttle valve to match the usage requirements of the spraying station; compressed air supplied by air source one; and the air circuit being controlled by solenoid valve one. The opening and closing state of the pneumatic ball valve determines the paint circulation path. When open, the main supply pipe and the main return pipe are directly connected, forming a main pipe circulation; when closed, the main supply pipe and the main return pipe are disconnected, and the paint is forced to enter the spraying station through a branch pipe, forming a branch pipe circulation. Air source two adjusts the opening degree of the back pressure valve through solenoid valve two and a pneumatic pressure reducing valve. During operation, the back pressure valve is open to ensure stable spraying pressure; when not in operation, the back pressure valve is closed to reduce circulation resistance and energy consumption.

[0007] As a further description of the above technical solution: The pneumatic control valve assembly includes an air source one, which is installed at the end of the spray booth. A solenoid valve one is provided on the right side of the outer wall of the air source one, and a pneumatic control ball valve is provided on the right side of the outer wall of the solenoid valve one.

[0008] Through the above technical solution: the solenoid valve cuts off the connection between the air source and the pneumatic ball valve, and empties the compressed air in the pneumatic ball valve. The pneumatic ball valve is closed, and the system switches to branch pipeline circulation, maintaining only the flow of paint in the branch pipeline, reducing energy consumption. During cleaning, in conjunction with the ball bearing assembly, the pneumatic ball valve is opened, and the ball bearing moves under the push of compressed air to remove the paint in the main pipeline.

[0009] As a further description of the above technical solution: The back pressure generating component includes an air source two, which is installed on the top of the paint supply module. An electromagnetic valve two is installed on the right side of the outer wall of the air source two. A pneumatic pressure reducing valve is provided on the right side of the outer wall of the electromagnetic valve two. A back pressure valve is provided on the right side of the outer wall of the pneumatic pressure reducing valve.

[0010] The above technical solution enables precise control of the back pressure value of the coating system through air source two, solenoid valve two, pneumatic pressure reducing valve and back pressure valve, thereby achieving stable spraying pressure, optimized cycle energy consumption and efficient paint recovery.

[0011] As a further description of the above technical solution: The suction end of the circulation pump is connected to a second connecting pipe, and the other end of the second connecting pipe is connected to the interior of the circulation tank.

[0012] Through the above technical solution, the circulating pump, through the suction circuit formed by the connecting pipe 2 and the circulating tank, can continuously deliver paint to the spraying system for spraying.

[0013] As a further description of the above technical solution: A ball-launching device is installed at the other end of the outer wall of the upstream valve, and a connecting pipe is connected to the top of the circulation tank.

[0014] The above technical solution utilizes a ball-launching device to launch balls for scraping the main supply and return pipes, achieving efficient paint recycling and environmentally friendly cleaning.

[0015] As a further description of the above technical solution: A back pressure generating component is installed at the inlet of the third connecting pipe, and the inlet end of the back pressure generating component is connected to the outlet end of the downstream valve.

[0016] Through the above technical solution: the connecting pipe three serves as the return channel of the circulation system, and the back pressure generating component enables precise control of the system pressure, and works with the downstream valve to complete the ball bearing recovery and pipeline cleaning.

[0017] As a further description of the above technical solution: The outlet end of the connecting pipe is connected to the inlet end of the upstream valve, and the outlet end of the upstream valve is connected to the main supply pipe. One end of the pneumatic control valve assembly is connected to the main supply pipe, and the other end is connected to one end of the main return pipe.

[0018] The above technical solution allows for the following: when rapid system evacuation is required, the pneumatic ball valve opens. A ball bearing is installed at the ball bearing launcher station below the upstream valve, and compressed air is connected to this port. The compressed air then pushes the ball bearing to discharge the paint from the ball bearing receiver station below the downstream valve.

[0019] This utility model has the following beneficial effects: 1. In this utility model, when not in operation, the pneumatic ball valve is closed to separate the main supply pipe and the main return pipe, thereby realizing the circulation of the branch pipe. When recovering the paint, the pneumatic ball valve is opened to connect the main supply pipe and the main return pipe, and recover the paint in the main supply pipe and the main return pipe, thereby reducing waste liquid discharge, shortening cleaning time, and reducing solvent consumption. This solves the problem in the prior art where the ball bearing pipe does not support the circulation of the branch pipe, resulting in paint sedimentation in the branch pipe.

[0020] 2. In this invention, by closing the pneumatically controlled ball valve, the system switches to branch pipe circulation, maintaining only the flow of paint within the branch pipe, thus reducing energy consumption. During cleaning, in conjunction with the ball bearing assembly, the pneumatically controlled ball valve opens, and the ball bearing, propelled by compressed air, recovers the paint from the main supply and return pipes into the ball bearing receiving device, thereby improving cleaning efficiency and reducing paint waste. Attached Figure Description

[0021] Figure 1 This is a perspective view of a circulating device with branch pipes for automotive painting proposed in this utility model. Figure 2 This is a schematic diagram of the structure of a pneumatic valve assembly with branch pipe circulation equipment for automotive painting, as proposed in this utility model. Figure 3 This is a schematic diagram of the back pressure generating component of a circulating device with branch pipes for automotive painting, as proposed in this utility model.

[0022] Legend: 1. Paint supply module; 2. Circulation pump; 3. Upstream valve; 4. Downstream valve; 5. Connecting pipe three; 6. Pneumatic valve assembly; 601. Air source one; 602. Solenoid valve one; 603. Pneumatic ball valve; 7. Branch pipeline; 8. Spraying station; 9. Main supply pipe; 10. Main return pipe; 11. Back pressure generating assembly; 1101. Air source two; 1102. Solenoid valve two; 1103. Pneumatic pressure reducing valve; 1104. Back pressure valve; 12. Circulation tank; 13. Ball bearing launcher; 14. Ball bearing receiver; 15. Spray booth; 16. Connecting pipe one; 17. Connecting pipe two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] These are examples, not all examples. All other examples obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a circulating device with branch pipes for automotive painting, comprising a paint supply module 1, a pneumatic control valve assembly 6 installed on the top of the paint supply module 1 for controlling the flow of the pipe, a back pressure generating assembly 11 installed inside the paint supply module 1 for controlling the air pressure, a circulating pump 2 installed inside the paint supply module 1, a spray booth 15 installed on the top of the paint supply module 1, a main supply pipe 9 installed on the outer wall of the spray booth 15, a main return pipe 10 installed on the outer side of the spray booth 15, the end of the main supply pipe 9 connected to the top of the main return pipe 10, and multiple spraying stations 8 installed on the inner wall of the spray booth 15. Multiple branch pipes 7 are equidistantly connected on the outer wall. A circulation tank 12 is installed inside the paint supply module 1. The output end of the circulation pump 2 is connected to a connecting pipe 16. An upstream valve 3 is installed at the other end of the outer wall of the connecting pipe 16. A downstream valve 4 is installed at the end of the main return pipe 10. A ball bearing receiving device 14 is installed at the bottom of the downstream valve 4. The back pressure generating component 11 includes an air source 2 1101. The air source 2 1101 is installed on the top of the paint supply module 1. A solenoid valve 2 1102 is installed on the right side of the outer wall of the air source 2 1101. A pneumatic pressure reducing valve 1103 is provided on the right side of the outer wall of the solenoid valve 2 1102. A back pressure valve 1104 is provided on the right side of the outer wall of the pneumatic pressure reducing valve 1103. Specifically, the circulating pump 2 draws paint from the circulating tank 12 through the connecting pipe 2 17. The paint is then transported to each spraying station 8 via the connecting pipe 1 16 and the main supply pipe 9. The output flow rate is adjusted by frequency converter or throttle valve to match the usage requirements of the spraying station 8. The air source 1 601 provides compressed air, and the air circuit is controlled by the solenoid valve 1 602. The opening and closing state of the pneumatic ball valve 603 determines the paint circulation path. When open, the main supply pipe 9 is directly connected to the main return pipe 10, forming a main pipe circulation. When closed, the main supply pipe 9 is disconnected from the main return pipe 10, and the paint is forced to enter the spraying station 8 through the branch pipe 7, forming a branch pipe circulation. The air source 2 1101 adjusts the opening degree of the back pressure valve 1104 through the solenoid valve 2 1102 and the pneumatic pressure reducing valve 1103. When the back pressure valve 1104 is open, the system back pressure is established to ensure the spraying pressure. The back pressure is stable. When not in operation, the back pressure valve 1104 is closed to reduce circulation resistance and energy consumption. The back pressure generating component 11 includes an air source 2 1101, which is installed on the top of the paint supply module 1. A solenoid valve 2 1102 is installed on the right side of the outer wall of the air source 2 1101. A pneumatic pressure reducing valve 1103 is installed on the right side of the outer wall of the solenoid valve 2 1102. A back pressure valve 1104 is installed on the right side of the outer wall of the pneumatic pressure reducing valve 1103. The suction end of the circulation pump 2 is connected to a connecting pipe 2 17. The other end of the connecting pipe 2 17 is connected to the inside of the circulation tank 12. Through the air source 2 1101, the solenoid valve 2 1102, the pneumatic pressure reducing valve 1103 and the back pressure valve 1104, the back pressure value of the coating system can be precisely controlled to achieve stable spraying pressure, optimized circulation energy consumption and efficient paint recovery.

[0026] Reference Figure 1 , Figure 2 and Figure 3 The pneumatic valve assembly 6 includes an air source 601, which is installed on the top of the paint supply module 1. A solenoid valve 602 is installed on the right side of the outer wall of the air source 601. A pneumatic ball valve 603 is installed on the right side of the outer wall of the solenoid valve 602. The suction end of the circulation pump 2 is connected to a connecting pipe 17. The other end of the connecting pipe 17 is connected to the inside of the circulation tank 12. A ball ball launching device 13 is installed on the other end of the outer wall of the upstream valve 3. A connecting pipe 5 is connected to the top of the circulation tank 12. Specifically, solenoid valve 602 cuts off the connection between air source 601 and pneumatic ball valve 603, and empties the compressed air in pneumatic ball valve 603. Pneumatic ball valve 603 is closed, and the system switches to circulation in branch pipe 7, maintaining only the flow of paint in branch pipe 7 to reduce energy consumption. During cleaning, in conjunction with the ball bearing assembly, pneumatic ball valve 603 is opened, and the ball bearing, driven by compressed air, discharges the paint in the main supply pipe 9 and main return pipe 10. The circulation pump 2, through the suction circuit formed by connecting pipe 17 and circulation tank 12, can continuously deliver the paint to the spraying system for spraying.

[0027] Reference Figure 1 , Figure 2 and Figure 3 A back pressure generating assembly 11 is installed in the middle of the outer wall of connecting pipe 3 5. The other end of the outer wall of connecting pipe 3 5 is connected to the other end of the outer wall of downstream valve 4. The outer wall of connecting pipe 1 16 is connected to the main supply pipe 9. The two ends of the pneumatic control valve assembly 6 are connected to the main supply pipe 9 and the main return pipe 10, respectively. The right side of the outer wall of air source 1 601 is connected to the left side of solenoid valve 1 602. When the system needs to be emptied quickly, the pneumatic control ball valve 603 is opened and the back pressure valve 1104 is closed, turning the upstream valve 3 to the ball ball launching device 13 and connecting it to the main supply pipe 9, and turning the downstream valve 4 to the ball ball receiving device 14 and connecting it to the main return pipe 10. The ball ball is pushed into the pipeline by the ball ball launching device 13, and the ball ball is pushed by compressed air to empty the paint in the main supply pipe 9 and the main return pipe 10. Specifically, a back pressure generating assembly 11 is installed in the middle of the outer wall of connecting pipe 3 5. The other end of the outer wall of connecting pipe 3 5 is connected to the other end of the outer wall of downstream valve 4. The outer wall of connecting pipe 1 16 is connected to the main supply pipe 9. The two ends of the pneumatic control valve assembly 6 are connected to the main supply pipe 9 and the main return pipe 10, respectively. The right side of the outer wall of air source 1 601 is connected to the left side of solenoid valve 1 602. When the system needs to be emptied quickly, the pneumatic control ball valve 603 is opened and the back pressure valve 1104 is closed. The upstream valve 3 is switched to the ball bearing launcher 13 and connected to the main supply pipe 9, and the downstream valve 4 is switched to the ball bearing receiver 14 and connected to the main return pipe 10. The ball bearing is pushed into the pipeline by the ball bearing launcher 13, and the compressed air pushes the ball bearing to empty the paint in the main supply pipe 9 and the main return pipe 10.

[0028] Working principle: The paint circulates between the main supply pipe 9 and the main return pipe 10 to maintain stable pipeline pressure. In non-working conditions, the paint flows in the branch pipe 7 to prevent sedimentation and reduce waste from venting. Air source 1 601 provides compressed air, and the air circuit is controlled by solenoid valve 1 602, which drives the pneumatic ball valve 603 to connect the main supply pipe 9 and the main return pipe 10, allowing the paint to circulate in the main supply pipe 9. When the main supply pipe 9 and the main return pipe 10 are disconnected, the paint circulates between the spray station 8 and the main return pipe 10 via the main supply pipe 9 and the branch pipe 7. Air source 2 1101 supplies air to the back pressure valve 1104 through solenoid valve 2 1102 and pneumatic pressure reducing valve 1103 to regulate the pressure at the return end of the main supply pipe 9. Then, the back pressure valve 1104 opens, and the system back pressure is set by the pneumatic pressure reducing valve 1103. This, combined with the circulation pump 2, maintains the pressure required for spraying. When the back pressure valve 1104 closes, the back pressure value returns to zero, reducing circulation resistance and adapting to low-load circulation in the branch or main pipe. The circulation pump 2 draws paint from the circulation tank 12 and delivers it to the branch pipe 7 and spraying station 8 via the connecting pipe 16, main supply pipe 9, and main supply pipe 9. By controlling the speed or outlet pressure of the circulation pump 2, the flow requirements of different modes are adapted. Both the upstream valve 3 and the downstream valve 4 are three-way ball valves that allow ball bearings to pass through. Together with the ball bearing launcher 13 and the ball bearing receiver 14, compressed air pushes the ball bearings through the main supply pipe 9 and main supply pipe 14. The paint moves within the return pipe 10, and the pneumatic ball valve 603 opens, pushing the ball bearing through the main supply pipe 9 and the main return pipe 10 to the ball bearing receiving device 14 for efficient recovery. Back pressure valve 1104 and solenoid valve 1102 open, and the pneumatic pressure reducing valve 1103 is adjusted to its minimum, reducing the back pressure to zero. The pneumatic ball valve 603 and solenoid valve 602 open, connecting the main supply pipe 9. The pressure of the pneumatic pressure reducing valve 1103 and the outlet pressure of the circulation pump 2 are gradually increased to the design value, establishing main pipe circulation. Paint is supplied to the spraying station 8 via branch pipe 7. The pneumatic ball valve 603 closes, cutting off the main supply pipe 9. Paint circulates between the main supply pipe 9 and the main return pipe 10 via branch pipe 7 to prevent sedimentation. When the pneumatic ball valve... When valve 603 is activated, the main supply pipe 9 is restored to circulation, further mixing the paint. By closing the pneumatic ball valve 603, the main supply pipe 9 and the main return pipe 10 are separated, allowing the paint to circulate in the branch pipe 7. This prevents paint sedimentation during non-working conditions and improves paint utilization. The main supply pipe 9 and the main return pipe 10 are designed with equal diameters, which can support ball bearings for paint recovery and cleaning, thereby improving paint utilization, reducing waste liquid discharge, shortening cleaning time, and reducing solvent consumption. This avoids the problems in the existing technology where the paint in the pipeline is discharged when not in use, resulting in low paint recovery rate, large waste liquid discharge, and large solvent consumption for cleaning the pipeline, which cannot meet the usage requirements. When the pneumatic ball valve 603 is closed, the system switches to branch pipe circulation, maintaining only the flow of paint in the branch pipe 7, thus reducing energy consumption. During cleaning, in conjunction with the ball bearing assembly, the pneumatic ball valve 603 is opened, and the ball bearing moves under the push of compressed air to remove the paint in the main supply pipe 9 and the main return pipe 10, thereby improving cleaning efficiency.

[0029] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circulating device with branch pipes for automotive painting, comprising a paint supply module (1), characterized in that: The top of the paint supply module (1) is equipped with a pneumatic control valve assembly (6), which is used to control the flow of the channel in the pipeline. The inside of the paint supply module (1) is equipped with a back pressure generating assembly (11), which is used to control the backflow pressure. The paint supply module (1) is equipped with a circulation pump (2), a spray booth (15) is installed on the top of the paint supply module (1), a main supply pipe (9) is installed on the outer wall of the spray booth (15), a main return pipe (10) is installed on the outer side of the spray booth (15), the end of the main supply pipe (9) is connected to the top of the main return pipe (10), multiple spraying stations (8) are installed on the inner wall of the spray booth (15), multiple branch pipes (7) are equidistantly connected on the outer wall of the main return pipe (10), a circulation tank (12) is installed inside the paint supply module (1), a connecting pipe (16) is connected to the output end of the circulation pump (2), an upstream valve (3) is installed on the other end of the outer wall of the connecting pipe (16), a downstream valve (4) is installed at the end of the main return pipe (10), and a ball receiving device (14) is installed at the bottom of the downstream valve (4).

2. A circulating device with branch pipes for automotive painting according to claim 1, characterized in that: The pneumatic valve assembly (6) includes an air source (601), which is installed on the top of the paint supply module (1). A solenoid valve (602) is provided on the right side of the outer wall of the air source (601), and a pneumatic ball valve (603) is provided on the right side of the outer wall of the solenoid valve (602).

3. A circulating device with branch pipes for automotive painting according to claim 1, characterized in that: The back pressure generating assembly (11) includes an air source two (1101), which is installed on the top of the paint supply module (1). A solenoid valve two (1102) is installed on the right side of the outer wall of the air source two (1101). A pneumatic pressure reducing valve (1103) is provided on the right side of the outer wall of the solenoid valve two (1102). A back pressure valve (1104) is provided on the right side of the outer wall of the pneumatic pressure reducing valve (1103).

4. A circulating device with branch pipes for automotive painting according to claim 1, characterized in that: The suction end of the circulation pump (2) is connected to a connecting pipe two (17), and the other end of the connecting pipe two (17) is connected to the interior of the circulation tank (12).

5. A circulating device with branch pipes for automotive painting according to claim 1, characterized in that: The other end of the outer wall of the upstream valve (3) is equipped with a ball-launching device (13), and the top of the circulation tank (12) is connected to a connecting pipe (5).

6. A circulating device with branch pipes for automotive painting according to claim 5, characterized in that: A back pressure generating component (11) is installed in the middle of the outer wall of the connecting pipe three (5), and the other end of the outer wall of the connecting pipe three (5) is connected to the other end of the outer wall of the downstream valve (4).

7. A circulating device with branch pipes for automotive painting according to claim 1, characterized in that: The outer wall of the connecting pipe (16) is connected to the main supply pipe (9), and the two ends of the pneumatic valve assembly (6) are connected to the main supply pipe (9) and the main return pipe (10) respectively.

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