A paint spraying device with a cleaning system and a control method thereof

Abstract

The present invention discloses a paint spraying device with a cleaning system and a control method thereof, relating to the field of paint spraying technology, wherein the paint spraying device includes a spray gun, a gear pump, a paint bucket, and a cleaning system; the oil inlet of the gear pump is connected to the paint bucket via an oil inlet pipe, and the oil outlet of the gear pump is connected to the spray gun via an oil outlet pipe; the cleaning system includes a cleaning agent bucket, a first air-controlled valve, a first one-way valve, a first air source, and a second air source; the first air-controlled valve is provided with an inlet A1, an inlet B1, and an outlet P1; the inlet A1 is connected to the cleaning agent bucket or the first air source, the inlet B1 is connected to the second air source, and the outlet P1 is connected to the oil inlet pipe via the first one-way valve. In the present invention, the first air-controlled valve can be selectively connected to the cleaning agent bucket or the first air source, so that cleaning agent or compressed gas can be introduced according to a set cleaning program to quickly clean the paint in the pipeline, thereby improving cleaning efficiency and ensuring thorough cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of paint spraying, and in particular to a paint spraying device with a cleaning system and a control method thereof. Background Art

[0002] To meet diverse consumer needs, a wide variety of new colors are being developed for products in industries like apparel and luggage. This has led to an increasing demand for color in supporting components. Buttons and zippers are essential components in these industries, and their colors are typically applied using a spray painting process. However, since these colorful products are often customized and produced to meet the diverse needs of individual customers, production batches are typically small. This necessitates that the spray painting process for buttons and zippers be able to quickly change colors to accommodate specialized production requirements.

[0003] However, in the existing painting industry, the painting process for small objects generally adopts batch painting production, that is, 5,000-50,000 or more products are placed in the same container for painting. In order to accurately control the coating thickness, the spray gun usually needs to use oil pipes, gear pumps, inverters and other components to cooperate with each other to achieve oil supply. Although this oil supply method can provide accurate oil supply, due to the unreasonable design of the cleaning system, gun cleaning and color changing are very time-consuming. Frequent color changes will affect work efficiency. Therefore, it cannot meet the special production needs of buttons and zippers in customized orders with small production batches and multiple colors. Summary of the Invention

[0004] The present invention provides a paint spraying device with a cleaning system and a control method thereof, the main purpose of which is to solve the problems of unreasonable structural design of existing paint spraying devices with a cleaning system, troublesome gun washing and color changing, and affected work efficiency.

[0005] The present invention adopts the following technical solutions:

[0006] A paint spraying device with a cleaning system includes a spray gun, a gear pump, a paint bucket and a cleaning system; the oil inlet of the gear pump is connected to the paint bucket through an oil inlet pipe, and the oil outlet of the gear pump is connected to the spray gun through an oil outlet pipe; the cleaning system includes a cleaning agent bucket, a first air-controlled valve, a first one-way valve, a first air source and a second air source, the first air-controlled valve is provided with an inlet A1, an inlet B1 and an outlet P1, the inlet A1 is connected to the cleaning agent bucket or the first air source, the inlet B1 is connected to the second air source, and the outlet P1 is connected to the oil inlet pipe through the first one-way valve.

[0007] Furthermore, the cleaning system also includes a second air-controlled valve, which is provided with an inlet A2, an inlet B2 and an outlet P2. The inlet A2 is connected to the oil inlet pipe, the inlet B2 is connected to the second air source, and the outlet P1 is connected to the oil outlet pipe.

[0008] Furthermore, the cleaning system also includes a waste paint bucket, which is connected to the oil inlet pipe.

[0009] Furthermore, the cleaning system also includes a first air inlet pipe and a liquid inlet pipe; the first air source is connected to the inlet A1 through the first air inlet pipe, and the first air inlet pipe is provided with a first control valve and a second one-way valve; the cleaning agent barrel is connected to the inlet A1 through the liquid inlet pipe, and the liquid inlet pipe is provided with a second control valve.

[0010] Furthermore, the cleaning system further includes a third air source and a third air inlet pipe. The third air source is connected to the cleaning agent barrel through the third air inlet pipe, and a third one-way valve is provided on the third air inlet pipe.

[0011] Furthermore, the cleaning system further includes a second air inlet pipe, and both the inlet B1 and the inlet B2 are connected to the second air source through the second air inlet pipe.

[0012] Furthermore, it also includes a fourth gas source and a fourth air inlet pipe, and the fourth gas source is connected to the spray gun through the fourth air inlet pipe.

[0013] A control method for a paint spraying device, the structure of the paint spraying device being as described above, the control method comprising the following steps:

[0014] S1, oiling operation: the paint in the paint bucket is pumped into the gear pump through the oil inlet pipe and sprayed out from the spray gun through the oil outlet pipe;

[0015] S2, oil return operation: the paint in the spray gun is returned to the gear pump through the oil outlet pipe by the gear pump, and then returned to the paint bucket through the oil inlet pipe;

[0016] S3. Cleaning operation: S31. Start the second air source, and draw the cleaning agent in the cleaning agent barrel into the gear pump through the oil inlet pipe through the first air control valve, and spray it from the spray gun through the oil outlet pipe, thereby diluting and discharging the paint in the pipeline; S32. Start the first air source and the second air source at the same time, and draw the compressed gas of the first air source into the gear pump through the oil inlet pipe through the first air control valve, and spray it from the spray gun through the oil outlet pipe, thereby completely discharging the paint and cleaning agent in the pipeline.

[0017] Furthermore, in step S31, part of the cleaning agent in the oil inlet pipe is directly introduced into the oil outlet pipe through the second air-controlled valve, and is combined with other cleaning agents discharged by the gear pump into the spray gun for spraying; in step S32, part of the compressed gas in the oil inlet pipe is directly introduced into the oil outlet pipe through the second air-controlled valve, and is combined with other compressed gas discharged by the gear pump into the spray gun for spraying.

[0018] Furthermore, in the step S31, part of the cleaning agent is discharged into the waste paint bucket through the oil inlet pipe; in the step S32, part of the compressed gas is discharged into the waste paint bucket through the oil inlet pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The first air-controlled valve of the cleaning system of the present invention can be selectively connected to the cleaning agent barrel or the first air source. Therefore, during the cleaning operation, the cleaning agent or compressed gas can be introduced according to the set cleaning program to quickly clean the paint in the pipeline, thereby improving the cleaning efficiency and ensuring thorough cleaning.

[0021] 2. The second air-controlled valve of the cleaning system of the present invention can directly connect the oil inlet pipe to the oil outlet pipe, so that the cleaning agent or compressed gas in the oil inlet pipe is discharged directly into the spray gun through the oil outlet pipe without passing through the gear pump, thereby increasing the flushing pressure of the spray gun 1 and improving the cleaning effect and efficiency of the spray gun.

[0022] 3. The first air-controlled valve of the cleaning system of the present invention can introduce cleaning agent or compressed gas into the entire oil inlet pipe, thereby achieving overall cleaning of the oil inlet pipe, and discharge the cleaned paint, cleaning agent and compressed gas into the waste paint bucket for unified cleaning, thereby ensuring that the pipeline is cleaned thoroughly without dead corners.

[0023] 4. In the present invention, the cleaning agent or compressed gas introduced through the first air-controlled valve can be divided into three paths to quickly and thoroughly clean the pipeline, thereby quickly completing the gun washing and color changing operations, greatly improving production efficiency, and meeting the special production requirements of buttons and zippers in customized orders with small production batches and multiple colors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a principle block diagram of the paint spraying device in the present invention.

[0025] Figure 2 This is a block diagram of the principle of the paint spraying device in the present invention performing the oiling operation.

[0026] Figure 3 This is a block diagram of the principle of the paint spraying device performing the oil removal operation in the present invention.

[0027] Figure 4 This is a block diagram of the principle of the paint spraying device performing the cleaning operation in the present invention.

[0028] Figure 5 It is a complete structural schematic diagram of the paint spraying device in the present invention.

[0029] In the figure: 1-spray gun; 2-gear pump; 3-paint bucket; 4-oil inlet pipe; 5-oil outlet pipe; 6-cleaning agent bucket; 7-first air control valve; 8-first one-way valve; 9-first air source; 10-second air source; 11-second air control valve; 12-waste paint bucket; 13-first air inlet pipe; 14-liquid inlet pipe; 15-third air source; 16-third air inlet pipe; 17-first control valve; 18-second one-way valve; 19-third one-way valve; 20-second air inlet pipe; 21-fourth air source; 22-fourth air inlet pipe; 23-fifth air source; 24-fifth air inlet pipe; 25-pressure reducing valve; 26-solenoid valve; 27-second control valve. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0031] like Figure 1 and Figure 5 As shown, this embodiment provides a paint spraying device with a cleaning system, including a spray gun 1, a gear pump 2, a paint bucket 3, and a cleaning system. The oil inlet of the gear pump 2 is connected to the paint bucket 3 via an oil inlet pipe 4, and the oil outlet of the gear pump 2 is connected to the spray gun 1 via an oil outlet pipe 5. The cleaning system includes a cleaning agent bucket 6, a first air-controlled valve 7, a first one-way valve 8, a first air source 9, and a second air source 10. The first air-controlled valve 7 has an inlet A1, an inlet B1, and an outlet P1. Inlet A1 is connected to the cleaning agent bucket 6 or the first air source 9, inlet B1 is connected to the second air source 10, and outlet P1 is connected to the oil inlet pipe 4 via the first one-way valve 8. Because the first air-controlled valve 7 can be selectively connected to the cleaning agent bucket 6 or the first air source 9, during the cleaning operation, cleaning agent or compressed gas can be introduced according to the set cleaning program to quickly clean the paint in the pipeline, thereby improving cleaning efficiency and ensuring thorough cleaning.

[0032] like Figure 1 and Figure 5 As shown, the cleaning system also includes a second air-controlled valve 11, which is provided with an inlet A2, an inlet B2, and an outlet P2. Inlet A2 is connected to the oil inlet pipe 4, inlet B2 is connected to the second air source 10, and outlet P1 is connected to the oil outlet pipe 5. During the cleaning operation, the second air-controlled valve 11 can directly connect the oil inlet pipe 4 to the oil outlet pipe 5, so that the cleaning agent or compressed gas in the oil inlet pipe 4 is discharged directly into the spray gun 1 through the oil outlet pipe 5 without passing through the gear pump 2. This increases the flushing pressure of the spray gun 1 and improves the cleaning effect and efficiency of the spray gun 1.

[0033] like Figure 1 and Figure 5 As shown, the cleaning system also includes a waste paint bucket 12, which is connected to the oil inlet pipe 4. During the cleaning operation, a cleaning agent or compressed air is introduced into the entire section of the oil inlet pipe 4 via the first air-controlled valve 7, thereby completely cleaning the oil inlet pipe 4. After cleaning, the waste paint, thinner, and compressed air are discharged into the waste paint bucket 12 for unified cleaning. In this embodiment, the connection between the oil inlet pipe 4, the paint bucket 3, and the waste paint bucket 12 is manually switched. In actual applications, a pneumatic valve can also be used to achieve automatic switching.

[0034] like Figure 5 As shown, the cleaning system also includes a first air inlet pipe 13, a liquid inlet pipe 14, a third air source 15, and a third air inlet pipe 16. The first air source 9 is connected to the inlet A1 via the first air inlet pipe 13, and the first air inlet pipe 13 is equipped with a first control valve 17 and a second check valve 18. The cleaning agent barrel 6 is connected to the inlet A1 via the liquid inlet pipe 14, and the second control valve 27 is installed on the liquid inlet pipe 14. The third air source 15 is connected to the cleaning agent barrel 6 via the third air inlet pipe 16, and the third check valve 19 is installed on the third air inlet pipe 16. Therefore, the first control valve 17 and the second control valve 27 can be used to switch the connection between the first air control valve 7 and the cleaning agent barrel 6 or the first air source 9, making operation simple and convenient. The third air source 15 and the third air inlet pipe 16 provide power for the cleaning agent barrel 6, ensuring that the cleaning agent in the cleaning agent barrel 6 is smoothly drained into the pipeline. In order to simplify the pipeline structure, the first control valve 17 and the second control valve 27 in this embodiment are also pneumatic valves, wherein the air intake of the first control valve 17 is provided by the first air source 9, and the air intake of the second control valve 27 is provided by the third air source 15.

[0035] like Figure 5 As shown, the cleaning system also includes a second air inlet pipe 20, and both the inlet B1 and the inlet B2 are connected to the second air source 10 through the second air inlet pipe 20. Since the first air-controlled valve 7 and the second air-controlled valve 11 work simultaneously during the cleaning operation, using the same air source and air inlet pipe to supply air to both can effectively optimize the pipeline structure and improve the control efficiency. Of course, in other embodiments, other types of two-way valves such as electric control valves and hydraulic valves can be used to replace the first air-controlled valve 7 and the second air-controlled valve 11, and corresponding pipeline adjustments can be made according to the specific valve type. The reason why the air-controlled valve is used in this embodiment is based on the characteristics of the cleaning medium. Specifically, the cleaning medium in this embodiment includes a cleaning agent and compressed gas, and the cleaning agent is preferably thinner. Therefore, the air-controlled valve is corrosion-resistant and high-pressure-resistant, and is conducive to optimizing the pipeline structure.

[0036] like Figure 5As shown, the paint spraying device also includes a fourth air source 21 and a fourth air inlet pipe 22, which are connected to the spray gun 1 via the fourth air inlet pipe 22. During the painting or cleaning process, the fourth air source 21 and the fourth air inlet pipe 22 can provide power to the spray gun 1, ensuring that the medium in the spray gun 1 is quickly sprayed out. In addition, the spray gun 1 is equipped with a fifth air source 23 and a fifth air inlet pipe 24 to ensure that the spray gun 1 can spray the paint in an atomized form.

[0037] like Figure 5 As shown, for ease of control, each gas source's inlet pipe is equipped with a pressure reducing valve 25 and a solenoid valve 26. A control system is also provided, connected to each component in the pipeline. The control system controls each component to execute relevant instructions according to a set operating program, thereby achieving operations such as oil inlet, oil withdrawal, and cleaning.

[0038] The following is based on Figure 1 The principle frame of the paint spraying device introduces in detail the control methods involved in the core components of the paint spraying device. The control principles of the remaining components can be implemented with reference to the control methods of the core components, so they are not described in detail.

[0039] like Figures 2 to 4 As shown, the control method of the paint spraying device includes the following steps:

[0040] S1. Oiling Operation: Paint from the paint bucket 3 is pumped into the gear pump 2 through the oil inlet pipe 4 and sprayed out of the spray gun 1 through the oil outlet pipe 5. Specifically, during this step, the cleaning system is inoperative. The control system, via the frequency converter, controls the gear pump 2 to rotate forward, providing power to transport paint and ensure the painting operation. The presence of a first check valve 8 prevents paint in the oil inlet pipe 4 from entering the first air-controlled valve 7, ensuring normal oiling and painting operations.

[0041] S2, oil return operation: The paint in the spray gun 1 is returned to the gear pump 2 through the oil outlet pipe 5 and then returned to the paint bucket 3 through the oil inlet pipe 4. Specifically, the cleaning system is not working during this step. After the painting is completed, the control system controls the gear pump 2 to reverse through the inverter, thereby providing power to transport the paint, so that the paint in the pipeline is returned to the paint bucket 3, thereby reducing the difficulty of subsequent pipeline cleaning and facilitating the cleaning operation.

[0042] S3. Cleaning operation: S31. Start the second air source 10, and draw the cleaning agent in the cleaning agent barrel 6 into the gear pump 2 through the oil inlet pipe 4 through the first air control valve 7, and discharge it into the spray gun 1 through the oil outlet pipe 5. At the same time, part of the cleaning agent in the oil inlet pipe 4 is directly introduced into the oil outlet pipe 5 through the second air control valve 11, and is combined with other cleaning agents discharged from the gear pump 2 into the spray gun 1 for spraying, thereby diluting and discharging the paint in the pipeline. S32. Simultaneously start the first air source 9 and the second air source 10, and draw the compressed gas of the first air source 9 into the gear pump 2 through the first air control valve 7 through the oil inlet pipe 4, and discharge it into the spray gun 1 through the oil outlet pipe 5. At the same time, part of the compressed gas in the oil inlet pipe 4 is directly introduced into the oil outlet pipe 5 through the second air control valve 11, and is combined with other compressed gas discharged from the gear pump 2 into the spray gun 1 for spraying, thereby completely discharging the paint and cleaning agent in the pipeline. In steps S31 and S32 , the cleaning agent or compressed gas introduced through the first air control valve 7 can also be discharged into the waste paint bucket 12 through the oil inlet pipe 4 , thereby completely cleaning the oil inlet pipe 4 alone.

[0043] As can be seen, during the cleaning operation, the cleaning agent or compressed gas introduced through the first air-controlled valve 7 can be divided into three routes for rapid cleaning of the pipelines. The first route is: cleaning agent barrel 6 / first air source 9 - first air-controlled valve 7 - first check valve 8 - oil inlet pipe 4 - gear pump 2 - oil outlet pipe 5 - spray gun 1; the second route is: cleaning agent barrel 6 / first air source 9 - first air-controlled valve 7 - first check valve 8 - oil inlet pipe 4 - second air-controlled valve 11 - oil outlet pipe 5 - spray gun 1; and the third route is: cleaning agent barrel 6 / first air source 9 - first air-controlled valve 7 - first check valve 8 - oil inlet pipe 4 - waste paint bucket 12. The first route is mainly used for rapid cleaning of the main pipelines of the paint spraying device, the second route is mainly used for pressurized flushing of the spray gun 1, and the third route is mainly used for rapid cleaning of the oil inlet pipe 4 of the paint spraying device. After testing, it was found that the use of this cleaning system can complete the gun washing and color changing operations within 2 minutes, greatly improving production efficiency and meeting the special production requirements of buttons and zippers in customized orders with small production batches and multiple colors.

[0044] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A paint spraying device with a cleaning system, characterized in that: It includes a spray gun, a gear pump, a paint bucket and a cleaning system; the oil inlet of the gear pump is connected to the paint bucket through an oil inlet pipe, and the oil outlet of the gear pump is connected to the spray gun through an oil outlet pipe; the cleaning system includes a cleaning agent bucket, a first air-controlled valve, a first one-way valve, a first air source and a second air source, the first air-controlled valve is provided with an inlet A1, an inlet B1 and an outlet P1, the inlet A1 is connected to the cleaning agent bucket or the first air source, the inlet B1 is connected to the second air source, and the outlet P1 is connected to the oil inlet pipe through the first one-way valve.

2. A paint spraying device with a cleaning system according to claim 1, characterized in that: The cleaning system further includes a second air-controlled valve having an inlet A2, an inlet B2 and an outlet P2. The inlet A2 is connected to the oil inlet pipe, the inlet B2 is connected to the second air source, and the outlet P1 is connected to the oil outlet pipe.

3. A paint spraying device with a cleaning system according to claim 2, characterized in that: The cleaning system further comprises a waste paint bucket, which is connected to the oil inlet pipe.

4. A paint spraying device with a cleaning system according to claim 1, characterized in that: The cleaning system also includes a first air inlet pipe and a liquid inlet pipe; the first air source is connected to the inlet A1 through the first air inlet pipe, and the first air inlet pipe is provided with a first control valve and a second one-way valve; the cleaning agent barrel is connected to the inlet A1 through the liquid inlet pipe, and the liquid inlet pipe is provided with a second control valve.

5. The paint spraying device with a cleaning system according to claim 1, characterized in that: The cleaning system further includes a third air source and a third air inlet pipe. The third air source is connected to the cleaning agent barrel through the third air inlet pipe, and a third one-way valve is provided on the third air inlet pipe.

6. A paint spraying device with a cleaning system according to claim 2, characterized in that: The cleaning system further includes a second air inlet pipe, and both the inlet B1 and the inlet B2 are connected to the second air source through the second air inlet pipe.

7. The paint spraying device with a cleaning system according to claim 1, characterized in that: It also includes a fourth gas source and a fourth air inlet pipe, and the fourth gas source is connected to the spray gun through the fourth air inlet pipe.

8. A control method for a paint spraying device, characterized in that: The structure of the paint spraying device is as described in claim 3, and the control method includes the following steps: S1, oiling operation: the paint in the paint bucket is pumped into the gear pump through the oil inlet pipe and sprayed out from the spray gun through the oil outlet pipe; S2, oil return operation: the paint in the spray gun is returned to the gear pump through the oil outlet pipe by the gear pump, and then returned to the paint bucket through the oil inlet pipe; S3. Cleaning operation: S31. Start the second air source, and draw the cleaning agent in the cleaning agent barrel into the gear pump through the oil inlet pipe through the first air control valve, and spray it from the spray gun through the oil outlet pipe, thereby diluting and discharging the paint in the pipeline; S32. Start the first air source and the second air source at the same time, and draw the compressed gas of the first air source into the gear pump through the oil inlet pipe through the first air control valve, and spray it from the spray gun through the oil outlet pipe, thereby completely discharging the paint and cleaning agent in the pipeline.

9. A control method for a paint spraying device according to claim 8, characterized in that: In step S31, part of the cleaning agent in the oil inlet pipe is directly introduced into the oil outlet pipe through the second air-controlled valve, and is introduced into the spray gun together with other cleaning agents discharged by the gear pump for spraying; in step S32, part of the compressed gas in the oil inlet pipe is directly introduced into the oil outlet pipe through the second air-controlled valve, and is introduced into the spray gun together with other compressed gas discharged by the gear pump for spraying.

10. A control method for a paint spraying device according to claim 8 or 9, characterized in that: In the step S31, part of the cleaning agent is discharged into the waste paint bucket through the oil inlet pipe; in the step S32, part of the compressed gas is discharged into the waste paint bucket through the oil inlet pipe.

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