A paint spraying room based on an improved internal and external circulation air pipe

Abstract

This application discloses a spray booth based on an improved internal and external circulation duct, relating to the field of spray painting equipment technology. It includes a main body, an internal circulation system, and an external circulation system. The main body includes a spray painting area, a circulating air area, and a recovery air area. The internal circulation system includes an inlet duct, a first outlet duct, and a second outlet duct. The inlet duct is located at the top of the recovery air area, the first outlet duct is located at the top of the spray painting area, and the second outlet duct is located at the top of the circulating air area. The airflow rate of the first outlet duct is greater than that of the second outlet duct. The internal circulation system is used to discharge a portion of the airflow recovered by the inlet duct from the first and second outlet ducts. The external circulation system includes a third outlet duct, located at the top of the spray painting area. This application can form a stable and reliable circulating air path, avoiding the problem of impeded airflow containing paint mist, and improving paint mist recovery efficiency to reduce the paint mist concentration in the spray painting area.

Description

Technical Field

[0001] This application relates to the field of spray painting equipment technology, and in particular to a spray painting booth based on an improved internal and external circulation air duct. Background Technology

[0002] As a dedicated place for painting workpieces, the core function of a spray booth is to control the paint mist generated during the painting process through reasonable airflow organization, prevent the paint mist from spreading outside the work area, and at the same time provide a stable painting environment for the workpieces to ensure coating quality.

[0003] However, the existing airflow design of the spray booth is inadequate, failing to form an orderly airflow path. This makes it easy for the gas containing paint mist to be blocked or swirled during the flow process, preventing it from flowing smoothly to the recovery area and being discharged. This not only affects the efficiency of paint mist recovery and treatment but may also lead to a high concentration of paint mist in the work area, which has an adverse effect on the painting quality and the working environment. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a paint booth based on an improved internal and external circulation duct, which can form a stable and reliable circulation air path, avoid the problem of airflow obstruction containing paint mist, and improve paint mist recovery efficiency to reduce the paint mist concentration in the painting processing area.

[0005] This application provides a spray booth based on an improved internal and external circulation duct, comprising:

[0006] The main body includes a painting processing area, a circulating air area, and a recovery air area.

[0007] An internal circulation system includes an air inlet pipe, a first air outlet pipe, and a second air outlet pipe. The air inlet pipe is located at the top of the recovered air zone, the first air outlet pipe is located at the top of the painting processing area, and the second air outlet pipe is located at the top of the circulating air zone. The air volume of the first air outlet pipe is greater than that of the second air outlet pipe. The internal circulation system is used to discharge a portion of the air volume recovered by the air inlet pipe from the first air outlet pipe and the second air outlet pipe.

[0008] An external circulation system, comprising a third air outlet duct, is located at the top of the painting processing area.

[0009] The paint booth based on the improved internal and external circulation duct according to the first aspect of this application has at least the following beneficial effects: In the internal circulation system of the paint booth of this application, the air volume of the first air outlet duct at the top of the painting processing area is greater than that of the second air outlet duct at the top of the circulation air area, driving the gas in the painting processing area to flow into the circulation air area, and finally being collected by the air inlet duct of the recovery air area to form a circulation. At the same time, the third air outlet duct of the external circulation system assists in the adjustment. By rationally arranging the position of the air outlet duct of the internal circulation system and controlling the air volume distribution to form a stable and reliable circulation air path, the problem of the obstruction of the airflow containing paint mist in the existing air path is solved, so that the airflow flows smoothly along the preset path, improving the paint mist recovery efficiency, reducing the paint mist concentration in the painting processing area to ensure the coating quality, and the rational operation of the internal circulation can also reduce energy consumption, taking into account both environmental protection and economy.

[0010] According to some embodiments of this application, the main body is provided with a guide compression plate between the first air outlet pipe and the second air outlet pipe. The guide compression plate gradually moves from top to bottom toward the painting processing area to increase the wind speed at the painting processing area, so that the wind speed at the painting processing area is greater than the wind speed in the circulating air zone.

[0011] According to some embodiments of this application, the lower end of the guide compression plate is provided with a height adjustment plate, which is used to further restrict the gas flow direction in the painting processing area according to the position of the product to be painted.

[0012] According to some embodiments of this application, the main body is further provided with a painting device, which is disposed in the painting processing area. The painting device includes a product clamp, which is disposed below the height adjustment plate and is used to clamp the product to be painted.

[0013] According to some embodiments of this application, the air volume ratio of the first air outlet pipe to the second air outlet pipe is 6:4.

[0014] According to some embodiments of this application, a guide pipe is provided between the first air outlet pipe and the second air outlet pipe, and a control valve is provided inside the second air outlet pipe, the control valve being used to adjust the opening degree of the second air outlet pipe.

[0015] According to some embodiments of this application, the main body is provided with filter cotton at the air outlets of the first air outlet pipe, the second air outlet pipe, and the third air outlet pipe.

[0016] According to some embodiments of this application, the main body is further provided with a recovery channel at the location of the recovery air zone. The lower end of the recovery channel is connected to the circulating air zone, and the upper end of the recovery channel is connected to the air inlet pipe. Several mutually staggered baffles are provided on both sides of the interior of the recovery channel. The baffles are used to block impurities in the gas.

[0017] According to some embodiments of this application, a water tank is provided at the lower end of the recovery channel. The gas in the circulating air zone enters the recovery channel after passing through the water tank, and the water tank is used to filter soluble impurities in the gas.

[0018] According to some embodiments of this application, the baffle is inclined downwards.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0021] Figure 1 The diagram shows the structure of a paint booth based on an improved internal and external circulation duct, which is provided for some embodiments of this application.

[0022] The attached icons are numbered as follows:

[0023] Main body 100; painting processing area 110; circulating air area 120; recovery air area 130; guide compression plate 140; height adjustment plate 150; filter cotton 160; air inlet pipe 210; first air outlet pipe 220; second air outlet pipe 230; guide pipe 240; control valve 250; third air outlet pipe 310; product clamp 400; recovery channel 500; baffle 510; water tank 520. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0028] As a dedicated area for painting workpieces, the core function of a spray booth is to control the paint mist generated during the painting process through reasonable airflow organization, preventing the paint mist from spreading outside the work area, and providing a stable painting environment for the workpieces to ensure coating quality. However, the existing airflow design of spray booths has shortcomings, failing to form an orderly airflow path. This causes the gas containing paint mist to easily encounter obstruction and swirling during flow, preventing it from flowing smoothly to the recovery area and being discharged. This not only affects the efficiency of paint mist recovery and treatment but may also lead to high paint mist concentration in the work area, adversely affecting painting quality and the working environment.

[0029] Based on this, this application provides a spray booth based on an improved internal and external circulation duct to solve the above-mentioned technical problems. The technical solutions provided by this application will be described in detail below.

[0030] Reference Figure 1 This application provides a spray booth based on an improved internal and external circulation duct system, comprising: a main body 100, an internal circulation system, and an external circulation system. The main body 100 includes a spray painting area 110, a circulating air area 120, and a recovery air area 130. The internal circulation system includes an inlet duct 210, a first outlet duct 220, and a second outlet duct 230. The inlet duct 210 is located at the top of the recovery air area 130, the first outlet duct 220 is located at the top of the spray painting area 110, and the second outlet duct 230 is located at the top of the circulating air area 120. The air volume of the first outlet duct 220 is greater than that of the second outlet duct 230. The internal circulation system is used to discharge a portion of the air volume recovered by the inlet duct 210 from the first outlet duct 220 and the second outlet duct 230. The external circulation system includes a third outlet duct 310, which is located at the top of the spray painting area 110.

[0031] In the internal circulation system of the spray booth of this application, the air volume of the first air outlet 220 at the top of the spray painting area 110 is greater than that of the second air outlet 230 at the top of the circulation air area 120, driving the gas in the spray painting area 110 to flow into the circulation air area 120. Finally, the gas is collected by the air inlet 210 of the recovery air area 130 to form a circulation. At the same time, the third air outlet 310 of the external circulation system assists in the adjustment. By rationally arranging the positions of the air outlets of the internal circulation system and controlling the air volume distribution, a stable and reliable circulation air path is formed, which solves the problem of the obstruction of the airflow containing paint mist in the existing air path. This allows the airflow to flow smoothly along the preset path, improves the paint mist recovery efficiency, reduces the paint mist concentration in the spray painting area 110 to ensure coating quality, and the rational operation of the internal circulation can also reduce energy consumption, taking into account both environmental protection and economy.

[0032] Continue to refer to Figure 1 It is understood that the main body 100 has a guide compression plate 140 between the first air outlet duct 220 and the second air outlet duct 230. The guide compression plate 140 gradually approaches the painting processing area 110 from top to bottom to increase the air velocity at the painting processing area 110, so that the air velocity at the painting processing area 110 is greater than the air velocity in the circulating air area 120. Through its inclined structure that gradually approaches the painting processing area 110 from top to bottom, the airflow channel between the painting processing area 110 and the circulating air area 120 is compressed, causing the airflow space on the painting processing area 110 side to gradually narrow. According to the principles of fluid mechanics, under the same air volume, a reduction in the flow cross-section will increase the air velocity in the painting processing area 110, thereby creating an airflow difference where the air velocity in the painting processing area 110 is greater than that in the circulating air area 120. By guiding the compression plate 140, the airflow driving force from the painting processing area 110 to the circulating air area 120 is enhanced, preventing paint mist-containing gas from stagnating in the painting processing area 110 and improving the smoothness and stability of airflow. Simultaneously, the higher wind speed can more efficiently remove paint mist generated during painting, reducing paint mist adhesion interference on the workpiece surface, further ensuring coating quality. Combined with the airflow distribution of the exhaust duct, this makes the overall airflow path more orderly and improves the efficiency of paint mist recovery and treatment.

[0033] Continue to refer to Figure 1It is understandable that the lower end of the guide compression plate 140 is equipped with a height adjustment plate 150, which is used to further restrict the gas flow direction within the painting processing area 110 according to the position of the product to be painted. By adjusting its own height, it adapts to the specific position of the product to be painted, thereby flexibly changing the airflow channel state at the bottom of the painting processing area 110. When the product position is different, adjusting the height of the height adjustment plate 150 can specifically restrict the airflow direction, making the gas flow more precisely around the product, ensuring that the paint mist-containing gas can be effectively guided from the periphery of the product to the circulating air zone 120. This allows the height adjustment plate 150 to optimize the airflow path regardless of the height position of the product to be painted, avoiding localized paint mist retention caused by differences in product position, and ensuring efficient discharge of paint mist.

[0034] Continue to refer to Figure 1 Understandably, the main body 100 also includes a painting device located in the painting processing area 110. This device includes a product clamp 400, positioned below the height adjustment plate 150, for holding the product to be painted. The product clamp 400 stably holds the product, preventing uneven coating caused by product movement during painting and ensuring basic painting accuracy. Simultaneously, the product is fixed in a suitable position below the height adjustment plate 150, allowing the height adjustment plate 150's airflow control to act more directly on the product surface, ensuring that paint mist is promptly carried away by the airflow and reducing excess paint mist adhesion to the product surface. Furthermore, the coordinated position of the clamp and the height adjustment plate 150 enhances adaptability to different products and the stability of the painting process, further ensuring consistent coating quality.

[0035] It is understandable that the airflow ratio of the first air outlet duct 220 and the second air outlet duct 230 is 6:4. In one embodiment, if the airflow of the first air outlet duct 220 is 5760 m³ / h, then the airflow of the second air outlet duct 230 is 3840 m³ / h. In addition, the airflow of the third air outlet duct 310 is 2400 m³ / h. Therefore, the airflow of the inlet duct 210 is 12000 m³ / h. After being processed by the external filtration system, 9600 m³ / h will re-enter the first air outlet duct 220 and the second air outlet duct 230. The 6:4 ratio ensures that the painting processing area 110 has sufficient airflow to move the paint mist to the circulating air area 120, effectively preventing paint mist stagnation, and also avoids energy waste caused by excessive first airflow or airflow imbalance in the circulating air area 120 caused by insufficient second airflow. This ratio works synergistically with other airflow structures to make the overall airflow more stable and efficient. While improving the paint mist recovery and treatment effect, it also takes into account the economic efficiency of system operation and further ensures the stability of paint spraying quality.

[0036] Reference Figure 1It is understood that a guide pipe 240 is provided between the first air outlet duct 220 and the second air outlet duct 230, and a control valve 250 is provided inside the second air outlet duct 230. The control valve 250 is used to adjust the opening of the second air outlet duct 230. The guide pipe 240 is located between the first air outlet duct 220 and the second air outlet duct 230, and its core function is to guide part of the gas that is initially directed to the first air outlet duct 220 by the internal circulation system to the second air outlet duct 230, so that the distribution of the two airflows is more orderly. This ensures that the first air outlet duct 220 retains the main airflow to the painting processing area 110, while the second air outlet duct 230 receives some airflow through the guide pipe 240 and enters the circulating air area 120. At the same time, the control valve 250 inside the second air outlet duct 230 can flexibly change the gas flow rate entering the second air outlet duct 230 through the guide pipe 240 by adjusting its opening, thereby precisely adjusting the airflow ratio of the two pipes to adapt to different painting scenarios.

[0037] Continue to refer to Figure 1 It is understandable that the main body 100 is equipped with filter cotton 160 at the air outlets of the first air outlet 220, the second air outlet 230, and the third air outlet 310. The filter cotton 160 of the internal circulation system can reduce paint mist and impurities in the circulating airflow, prevent them from re-entering the painting processing area 110 and adhering to the workpiece surface, and ensure the cleanliness of the coating.

[0038] Reference Figure 1 It is understandable that the main body 100 also has a recovery channel 500 at the position of the recovery air zone 130. The lower end of the recovery channel 500 is connected to the circulating air zone 120, and the upper end of the recovery channel 500 is connected to the air inlet pipe 210. Several staggered baffles 510 are provided on both sides of the interior of the recovery channel 500. The baffles 510 are used to block impurities in the gas. The recovery channel 500 connects the circulating air zone 120 and the air inlet pipe 210, forming a return path for the internal circulating gas. The gas in the circulating air zone 120 carrying a small amount of residual paint mist and impurities enters the lower end of the recovery channel 500, flows upward along the channel to the air inlet pipe 210, and re-participates in the internal circulation. The staggered baffles 510 on both sides of the inside of the recovery channel 500 will form a "tortuous channel" for the gas flow path, so that the gas cannot pass in a straight line and needs to go around the baffles 510 to change its flow direction. The paint mist particles, impurities, etc. carried in the gas are difficult to turn synchronously with the airflow due to their large inertia or gravity. They will collide with and adhere to the surface of the baffles 510, thus being intercepted and separated, which greatly improves the purification capacity of the recovery channel 500 for the circulating gas.

[0039] Continue to refer to Figure 1It is understood that a water tank 520 is provided at the lower end of the recovery channel 500. Gas from the circulating air zone 120 enters the recovery channel 500 after passing through the water tank 520. The water tank 520 is used to filter soluble impurities in the gas. The water tank 520 at the lower end of the recovery channel 500 serves as a pre-purification device before the gas from the circulating air zone 120 enters the recovery channel 500. Gas carrying paint mist and soluble impurities containing soluble components in the circulating air zone 120 must first pass through the water tank 520. This gas can pass through the water body in the form of bubbles or flow over the liquid film formed on the water surface. The specific impurity removal method is not limited here. Soluble impurities in the gas, such as some solvents and water-soluble resins in the paint mist, will come into contact with water and dissolve, while some insoluble particles may also remain in the water due to adsorption and adhesion, thus achieving preliminary purification of the gas entering the recovery channel 500.

[0040] Understandably, the baffle 510 is tilted downwards. When the gas in the circulating air zone 120, or after preliminary purification in the water tank 520, enters the recovery channel 500 and flows upwards along the channel, residual impurities in the gas will collide with the airflow path due to being blocked by the misaligned baffle 510. Some impurities directly impact the surface of the tilted baffle 510. Because the baffle 510 is tilted downwards, the impurities attached to the surface will naturally slide down the tilted surface under the influence of gravity. At the same time, the downward tilted baffle 510 will also lengthen the path of gas flow. Compared with the horizontal or upward tilted baffle 510, the airflow needs to "work harder" to bypass the tilted surface, indirectly increasing the probability of collision between impurities and the baffle 510, improving the interception efficiency, and thus further purifying the circulating gas entering the air inlet duct 210, ensuring the cleanliness of the painting processing area 110.

[0041] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A spray booth based on an improved internal and external circulation duct, characterized in that, include: The main body includes a painting processing area, a circulating air area, and a recovery air area. An internal circulation system includes an air inlet pipe, a first air outlet pipe, and a second air outlet pipe. The air inlet pipe is located at the top of the recovered air zone, the first air outlet pipe is located at the top of the painting processing area, and the second air outlet pipe is located at the top of the circulating air zone. The air volume of the first air outlet pipe is greater than that of the second air outlet pipe. The internal circulation system is used to discharge a portion of the air volume recovered by the air inlet pipe from the first air outlet pipe and the second air outlet pipe. An external circulation system, comprising a third air outlet duct, is located at the top of the painting processing area.

2. The paint booth based on the improved internal and external circulation duct as described in claim 1, characterized in that, The main body has a guide compression plate between the first air outlet pipe and the second air outlet pipe. The guide compression plate gradually moves from top to bottom toward the painting processing area to increase the wind speed in the painting processing area so that the wind speed in the painting processing area is greater than the wind speed in the circulating air zone.

3. The paint booth based on the improved internal and external circulation duct as described in claim 2, characterized in that, The lower end of the guide compression plate is provided with a height adjustment plate, which is used to further restrict the gas flow direction in the painting processing area according to the position of the product to be painted.

4. The paint booth based on the improved internal and external circulation duct as described in claim 3, characterized in that, The main body is also equipped with a painting device, which is located in the painting processing area. The painting device includes a product clamp, which is located below the height adjustment plate and is used to hold the product to be painted.

5. The paint booth based on the improved internal and external circulation duct as described in claim 1, characterized in that, The air volume ratio of the first air outlet pipe to the second air outlet pipe is 6:

4.

6. The paint booth based on the improved internal and external circulation duct as described in claim 5, characterized in that, A guide pipe is provided between the first air outlet pipe and the second air outlet pipe, and a control valve is provided inside the second air outlet pipe. The control valve is used to adjust the opening degree of the second air outlet pipe.

7. The paint booth based on the improved internal and external circulation duct as described in claim 1, characterized in that, The main body is equipped with filter cotton at the air outlets of the first air outlet pipe, the second air outlet pipe, and the third air outlet pipe.

8. The paint booth based on the improved internal and external circulation duct as described in claim 1, characterized in that, The main body is also provided with a recovery channel at the location of the recovery air zone. The lower end of the recovery channel is connected to the circulation air zone, and the upper end of the recovery channel is connected to the air inlet pipe. Several staggered baffles are provided on both sides of the inside of the recovery channel. The baffles are used to block impurities in the gas.

9. The paint booth based on the improved internal and external circulation duct as described in claim 8, characterized in that, The lower end of the recovery channel is equipped with a water pool. The gas in the circulating air zone enters the recovery channel after passing through the water pool. The water pool is used to filter soluble impurities in the gas.

10. The paint booth based on the improved internal and external circulation duct as described in claim 8, characterized in that, The baffle is tilted downwards.

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