An environmentally-friendly coating production line for automotive interior parts

Abstract

The application provides an environmentally-friendly coating production line for automotive interior parts, comprising a spraying chamber, a drying chamber and a filter box, a conveying structure for conveying the interior parts is arranged between the spraying chamber and the drying chamber, an interception assembly for treating the spraying exhaust gas is arranged outside the spraying chamber, and a condensation assembly for treating the drying exhaust gas is arranged outside the drying chamber. Different types of exhaust gas are treated in a partitioned manner, paint mist particles in the exhaust gas discharged from the spraying chamber are intercepted by the interception assembly, the problem of filter failure caused by the blockage of the filter box by the paint mist particles is reduced, the waste heat in the exhaust gas in the drying chamber is exchanged by the heat exchange pipe, the waste heat in the exhaust gas is recycled and utilized, the temperature of the exhaust gas is reduced, the condensation of water vapor in the exhaust gas is promoted, the influence of the high-temperature carried by the exhaust gas on the filter box is reduced, and the problem of saturation failure of the filter element caused by the water vapor stealing the activated carbon adsorption sites is avoided.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to an environmentally friendly coating production line for automotive interior parts. Background Technology

[0002] With the widespread adoption of environmentally friendly coating processes for automotive interior parts, the differentiated characteristics of waste gas components during coating production are becoming increasingly prominent. The traditional unified collection and mixing treatment model can no longer meet current production needs, gradually exposing many common pain points in the industry. Automotive interior parts coating production lines mainly consist of two core pollution-generating units: the spraying chamber and the drying chamber. The waste gas generated in the spraying chamber is primarily composed of room-temperature paint mist particles and low-concentration VOCs, while the waste gas generated in the drying chamber is characterized by high temperature and humidity, and high-concentration VOCs. The pollutant forms, temperature, humidity, and concentrations of the two types of waste gas differ greatly. Current technologies mostly directly integrate the two types of waste gas into the same duct system for mixing and treatment, fundamentally leading to low operating efficiency and frequent malfunctions in subsequent waste gas treatment systems.

[0003] Conventional coating exhaust gas treatment solutions lack zoned adaptation design for the exhaust gas characteristics of the spray booth and drying chamber. Large amounts of overspray paint mist generated in the spray booth enter the subsequent activated carbon adsorption unit directly without pre-filtering with high-efficiency filters. Paint mist particles quickly clog the pore structure of the activated carbon, significantly shortening its lifespan and causing a sharp increase in adsorption resistance within a short period. This forces frequent production line shutdowns to replace filter materials, resulting in high maintenance costs. Meanwhile, the drying chamber releases large amounts of high-temperature water vapor during paint curing. This high-humidity exhaust gas mixes directly into the main duct without dehumidification treatment, significantly increasing the relative humidity of the exhaust gas. Furthermore, water vapor molecules compete with VOCs for adsorption sites within the activated carbon, directly crowding out its effective adsorption capacity. Ultimately, this reduces the adsorption efficiency of the activated carbon for organic waste gases, and may even lead to premature saturation and failure, failing to meet environmental emission standards.

[0004] To alleviate the above problems, some existing technologies attempt to add a unified filtration and dehumidification device to the main air duct. However, this centralized treatment mode cannot take into account the differentiated needs of the two types of exhaust gases. The filtration precision designed for paint mist in the spraying room cannot be adapted to the working conditions of high-temperature exhaust gas in the drying room, and the filter material is prone to deformation and failure due to heat. On the other hand, the condensation dehumidification device designed for high-humidity exhaust gas in the drying room is quickly blocked by the large amount of paint mist brought in by the spraying room, resulting in a sharp drop in condensation heat exchange efficiency and a significant increase in equipment maintenance frequency, which leads to its shortcomings in use. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the existing defects and provide an environmentally friendly coating production line for automotive interior parts. This production line uses a zoned approach to treat different types of exhaust gases. An interception component intercepts paint mist particles in the exhaust gas discharged from the spraying chamber, reducing filtration failure caused by paint mist particles clogging the filter box. Meanwhile, the exhaust gas in the drying chamber undergoes energy exchange through heat exchange tubes, which not only recovers and utilizes the residual heat in the exhaust gas but also reduces the exhaust gas temperature and promotes the condensation of water vapor in the exhaust gas. This reduces the impact of high-temperature exhaust gas on the filter box and avoids the filter element saturation failure caused by water vapor competing for activated carbon adsorption sites. This effectively solves the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an environmentally friendly coating production line for automotive interior parts, comprising a spraying chamber, a drying chamber, and a filter box, wherein a conveying structure for conveying interior parts is provided between the spraying chamber and the drying chamber, an interception component for treating spraying exhaust gas is provided outside the spraying chamber, and a condensation component for treating drying exhaust gas is provided outside the drying chamber, wherein the end of the interception component away from the spraying chamber and the end of the condensation component away from the drying chamber are both connected to the inner cavity of the filter box.

[0007] As a preferred embodiment of the present invention, the interception assembly includes a mounting box, a connecting pipe connected to its inner cavity is installed on one side of the mounting box, and the other end of the connecting pipe is fixed to the top of the spraying chamber and connected to the inner cavity of the spraying chamber. A conveying pipe connected to its inner cavity is installed on the other side of the mounting box, and a first exhaust fan is installed on the conveying pipe. The end of the conveying pipe away from the mounting box is fixed to the outside of the filter box and connected to the inner cavity of the filter box. Several sets of interception plates are provided inside the mounting box.

[0008] As a preferred embodiment of the present invention, the mounting box has several mounting ports on its upper side, and the interceptor plate is sealed and installed in the mounting box through the mounting ports. The interceptor plate includes a positioning frame and a filter cloth. The filter cloth is installed between two sets of positioning frames and is replaceable. A cleaning component is provided in the mounting box near the interceptor plate.

[0009] As a preferred embodiment of the present invention, the cleaning component includes a connecting frame disposed outside the mounting box and a mounting base disposed inside the mounting box. A plurality of positioning rods are fixed between the connecting frame and the mounting base, and the plurality of positioning rods are slidably connected to the mounting box. A cleaning plate is installed inside the mounting base, and the cleaning plate is in contact with the side of the filter cloth. An electric telescopic rod for driving the cleaning component to move is installed on one side of the mounting box. A guide rod is fixed on the side of the connecting frame, and the guide rod is slidably connected to the outside of the mounting box.

[0010] As a preferred embodiment of the present invention, the bottom of the inner cavity of the mounting box is filled with liquid, the lower part of the interceptor plate is immersed in the liquid, a wastewater tank is provided outside the spraying chamber, a drain pipe communicating with the inner cavity of the wastewater tank is installed at the bottom of the mounting box, and a drain valve is installed on the drain pipe.

[0011] As a preferred embodiment of the present invention, the condensation assembly includes a collection pipe installed on the top of the drying chamber and communicating with the inner cavity of the drying chamber. An exhaust pipe communicating with the inner cavity of the collection pipe is installed on the lower side of the collection pipe. A second exhaust fan is installed on the exhaust pipe. The end of the exhaust pipe away from the collection pipe is installed on the outside of the filter box and communicating with the inner cavity of the filter box.

[0012] As a preferred embodiment of the present invention, a condensation box is provided outside the collecting pipe, and a heat exchange tube is wound around the outside of the collecting pipe inside the condensation box, with the inlet and outlet of the heat exchange tube both located outside the condensation box.

[0013] As a preferred embodiment of the present invention, a drain pipe communicating with the inner cavity of the collection pipe is installed at the bottom of the collection pipe, and a drain valve is installed on the drain pipe.

[0014] As a preferred embodiment of the present invention, the filter box is provided with a replaceable filter element, the filter element is filled with activated carbon, an exhaust pipe communicating with the inner cavity of the filter box is installed on the outside of the filter box, a gas detection sensor is installed on the outside of the exhaust pipe, and the detection end of the gas detection sensor is located inside the exhaust pipe.

[0015] As a preferred embodiment of the present invention, protective frames communicating with the inner cavity of the spraying chamber are installed on both sides of the spraying chamber and on both sides of the drying chamber near the conveying structure. A wind box communicating with the inner cavity is installed on the top of the protective frame, and several wind boxes are provided. An air outlet is opened at the bottom of the wind box. An air supply assembly is installed on the outer side of the spraying chamber and the outer side of the drying chamber. The air supply assembly includes an air pump. A main pipe is installed at the air outlet of the air pump. Several branch pipes communicating with the inner cavity of the wind box are installed on the side of the main pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. During the painting process of automotive interior parts, the first exhaust fan is controlled to draw air from the spraying chamber. The exhaust air in the spraying chamber enters the installation box through the connecting pipe. Several sets of intercepting plates installed in the installation box intercept paint mist particles in the exhaust air, preventing paint mist particles from entering the filter box with the exhaust air and affecting the service life of the filter box. At the same time, the first exhaust fan is located at the rear of the installation box to reduce the impact of paint mist particles on the use of the first exhaust fan and ensure the effective use of the first exhaust fan.

[0017] 2. When the coating exhaust gas passes through the interceptor plate, the filter cloth filters the paint mist particles in the coating exhaust gas, which facilitates the subsequent filtration of harmful gases in the exhaust gas. When the interceptor plate intercepts and filters the paint mist particles in the exhaust gas, it controls the electric telescopic rod to drive the connecting frame to move. The connecting frame drives the cleaning plate on the side of the mounting base to move through the positioning rod. The cleaning plate cleans the paint mist particles intercepted on the outside of the filter cloth, reducing the accumulation of paint mist particles on the outside of the filter cloth and increasing the service life of the filter cloth.

[0018] 3. The lower part of the filter cloth in the interceptor plate is immersed in the liquid, and the filter cloth is kept wet by capillary action, which prolongs the solidification time of the paint mist particles after being filtered by the filter cloth, making it easier for the cleaning component to clean the paint mist particles. The cleaning plate in the cleaning component scrapes the paint mist particles off the outside of the filter cloth and collects them on the cleaning plate. When the cleaning plate moves down into the liquid, the paint mist particles collected on the outside of the cleaning plate are dispersed in the liquid by buoyancy, and the cleaning plate is automatically cleaned by the liquid, which is convenient for long-term use of the cleaning plate.

[0019] 4. During the drying process of automotive interior parts after spraying, the second exhaust fan is controlled to operate, so that the exhaust pipe draws air from the drying chamber through the collection pipe, which facilitates the collection of exhaust gas in the drying chamber. When the high-temperature gas collected from the drying chamber moves through the collection pipe and passes through the condenser, the heat exchange tube installed in the condenser exchanges heat with the high-temperature exhaust gas, which facilitates the recovery and utilization of residual heat in the exhaust gas. At the same time, the high-temperature exhaust gas is cooled down through heat exchange to avoid the high temperature affecting the subsequent treatment of the exhaust gas.

[0020] 5. The high-temperature and high-humidity gas collected from the drying chamber is exchanged through the heat exchange tube. The water vapor in the gas condenses upon cooling and flows down the wall of the collection tube to the bottom of the collection tube. By opening the drain valve, some of the condensate can be discharged from the collection tube through the drain pipe, which facilitates the treatment of condensate. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure from another perspective of the present invention; Figure 3 This is a schematic diagram of the spraying chamber and drying chamber in this invention; Figure 4 This is a schematic diagram of the spraying chamber and the interception assembly in this invention; Figure 5 This is a schematic diagram of the front view of the filter box after it has been cut open in this invention; Figure 6 for Figure 5 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the interceptor plate within the interceptor component of the present invention; Figure 8 This is a cross-sectional view of the condenser box in this invention; Figure 9 for Figure 8 A magnified structural diagram at point B in the middle.

[0022] In the diagram: 1 Spraying chamber, 2 Drying chamber, 3 Conveying structure, 4 Interception assembly, 41 Mounting box, 42 Connecting pipe, 43 Conveying pipe, 44 Interception plate, 441 Positioning frame, 442 Filter cloth, 45 Cleaning component, 451 Connecting frame, 452 Positioning rod, 453 Mounting base, 454 Cleaning plate, 455 Guide rod, 456 Electric telescopic rod, 46 First exhaust fan, 47 Wastewater tank, 48 Drain pipe, 49 Drain valve, 5 Filter box, 51 Filter element, 52 Exhaust pipe, 53 Gas detection sensor, 6 Collection pipe, 61 Condensation box, 62 Heat exchange pipe, 63 Exhaust pipe, 64 Second exhaust fan, 65 Drain pipe, 66 Drain valve, 7 Protective frame, 71 Air box, 8 Air supply assembly, 81 Air supply pump, 82 Main pipeline, 83 Diversion pipe. Detailed Implementation

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

[0024] Please see Figure 1-9 This invention provides a technical solution: an environmentally friendly coating production line for automotive interior parts, comprising a spraying chamber 1, a drying chamber 2, and a filter box 5. Both the spraying chamber 1 and the drying chamber 2 utilize existing technology. The spraying chamber 1 includes at least a spraying assembly, and the drying chamber 2 includes at least a drying assembly. A conveyor structure 3 for transporting interior parts is provided between the spraying chamber 1 and the drying chamber 2. Pre-treated automotive interior parts are transported to the spraying chamber 1 for spraying via the conveyor structure 3. After spraying, the automotive interior parts are then transported to the drying chamber 2 via the conveyor structure 3 for drying and curing, ensuring the coating quality of the interior parts. Outside the spraying chamber 1... The unit is equipped with an interception component 4 for treating spraying exhaust gas. The interception component 4 is used to intercept paint mist particles in the exhaust gas of the spraying chamber 1, reducing the amount of paint mist particles entering the filter box 5 with the exhaust gas and affecting the use of the filter box 5. A condensation component is installed outside the drying chamber 2 for treating drying exhaust gas. The condensation component is used to cool down the high-temperature gas in the drying chamber 2, making it easier to filter the exhaust gas discharged from it. The end of the interception component 4 away from the spraying chamber 1 and the end of the condensation component away from the drying chamber 2 are both connected to the inner cavity of the filter box 5. The exhaust gas is intercepted and filtered by the interception component 4 and condensed and cooled by the condensation component before being uniformly discharged into the filter box 5 for filtration.

[0025] The interception component 4 includes a mounting box 41. A connecting pipe 42 communicating with the inner cavity of the mounting box 41 is installed on one side of the mounting box 41, and the other end of the connecting pipe 42 is fixed to the top of the spray chamber 1 and communicates with the inner cavity of the spray chamber 1. A conveying pipe 43 communicating with the inner cavity of the mounting box 41 is installed on the other side of the mounting box 41, and a first exhaust fan 46 is installed on the conveying pipe 43. The end of the conveying pipe 43 away from the mounting box 41 is fixed to the outside of the filter box 5 and communicates with the inner cavity of the filter box 5. Several sets of interception plates 44 are installed inside the mounting box 41. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) During the process, the first exhaust fan 46 is controlled to draw air from the spray booth 1. The exhaust gas in the spray booth 1 enters the installation box 41 through the connecting pipe 42. Several sets of intercepting plates 44 installed in the installation box 41 intercept paint mist particles in the exhaust gas, preventing paint mist particles from entering the filter box 5 with the exhaust gas and affecting the service life of the filter box 5. At the same time, the first exhaust fan 46 is set behind the installation box 41 to reduce the impact of paint mist particles on the use of the first exhaust fan 46 and ensure the effective use of the first exhaust fan 46.

[0026] The mounting box 41 has several mounting ports on its upper side. The interceptor plate 44 is sealed and installed in the mounting box 41 through the mounting ports. The interceptor plate 44 includes a positioning frame 441 and a filter cloth 442. The filter cloth 442 is installed between two sets of positioning frames 441 and is replaceable. When the painting exhaust gas passes through the interceptor plate 44, the filter cloth 442 filters the paint mist particles in the painting exhaust gas. The positioning frame 441 facilitates the positioning and replacement of the filter cloth 442. After the interceptor plate 44 is taken out of the mounting box 41 through the mounting ports, the interceptor plate 44 can be directly maintained and replaced. Since there are several sets of interceptor plates 44, non-stop processing can be achieved, which facilitates the use of the interceptor assembly 4.

[0027] A cleaning component 45 is installed inside the mounting box 41 near the interceptor plate 44. The cleaning component 45 includes a connecting frame 451 outside the mounting box 41 and a mounting base 453 inside the mounting box 41. Several positioning rods 452 are fixed between the connecting frame 451 and the mounting base 453, and the positioning rods 452 are slidably connected to the mounting box 41. A cleaning plate 454 is installed inside the mounting base 453, and the cleaning plate 454 contacts the side of the filter cloth 442. An electric telescopic rod 456 for driving the cleaning component 45 is installed on one side of the mounting box 41. A guide rod 455 is fixed to the side of the connecting frame 451, and the guide rod 455 is connected to the mounting base 442. The outer side of the box 41 is slidably connected. When the interceptor plate 44 intercepts and filters the paint mist particles in the exhaust gas, the electric telescopic rod 456 is controlled to drive the connecting frame 451 to move. The connecting frame 451 drives the cleaning plate 454 on the side of the mounting base 453 to move through the positioning rod 452. The cleaning plate 454 cleans the paint mist particles intercepted on the outside of the filter cloth 442, reduces the accumulation of paint mist particles on the outside of the filter cloth 442, and improves the service life of the filter cloth 442. When the electric telescopic rod 456 drives the connecting frame 451 to move, the guide rod 455 plays a positioning and guiding role, ensuring the stability of the connecting frame 451 when moving and the structural strength of the cleaning component 45 when in use.

[0028] The bottom of the inner cavity of the mounting box 41 is filled with liquid, which includes, but is not limited to, natural essential oils or high-boiling-point organic solvents. The lower part of the interceptor plate 44 is immersed in the liquid. A wastewater tank 47 is installed outside the spray booth 1. A drain pipe 48 connected to the inner cavity of the wastewater tank 47 is installed at the bottom of the mounting box 41, and a drain valve 49 is installed on the drain pipe 48. The lower part of the filter cloth 442 in the interceptor plate 44 is immersed in the liquid, and the filter cloth 442 is kept wet by capillary action, which prolongs the curing time of the paint mist particles after being filtered by the filter cloth 442, making it easier for the cleaning part 45 to clean the paint. The mist particles are cleaned by the cleaning plate 454 in the cleaning component 45, which scrapes the paint mist particles off the outside of the filter cloth 442 and collects them on the cleaning plate 454. When the cleaning plate 454 moves down into the liquid, the paint mist particles collected on the outside of the cleaning plate 454 are dispersed in the liquid due to buoyancy. The cleaning plate 454 is automatically cleaned by the liquid, which is convenient for long-term use of the cleaning plate 454. When it is necessary to replace the liquid in the installation box 41, the drain valve 49 is opened and the liquid in the installation box 41 is discharged into the wastewater tank 47 through the drain pipe 48, which is convenient for replacing the liquid in the installation box 41.

[0029] The condensation assembly includes a collection pipe 6 installed at the top of the drying chamber 2 and communicating with the inner cavity of the drying chamber 2. An exhaust pipe 63 communicating with the inner cavity is installed on the lower side of the collection pipe 6. A second exhaust fan 64 is installed on the exhaust pipe 63. The end of the exhaust pipe 63 away from the collection pipe 6 is installed on the outside of the filter box 5 and communicating with the inner cavity of the filter box 5. During the drying process in the drying chamber 2 after the automotive interior parts are sprayed, the second exhaust fan 64 is controlled to work, so that the exhaust pipe 63 draws air from the drying chamber 2 through the collection pipe 6, which facilitates the collection of exhaust gas in the drying chamber 2.

[0030] A condenser box 61 is installed outside the collection pipe 6. A heat exchange pipe 62 is wound around the outside of the collection pipe 6 inside the condenser box 61. The inlet and outlet of the heat exchange pipe 62 are both located outside the condenser box 61. When the high-temperature gas collected from the drying chamber 2 moves through the condenser box 61 in the collection pipe 6, the heat exchange pipe 62 installed in the condenser box 61 exchanges heat with the high-temperature waste gas, which facilitates the recovery and utilization of the waste heat in the waste gas. At the same time, the high-temperature waste gas is cooled down by heat exchange to avoid the high temperature affecting the subsequent treatment of the waste gas.

[0031] A drain pipe 65 connected to the inner cavity of the collecting pipe 6 is installed at the bottom of the collecting pipe 6. A drain valve 66 is installed on the drain pipe 65. The high temperature and high humidity gas collected from the drying chamber 2 by the collecting pipe 6 is converted by the heat exchange pipe 62. The water vapor in the gas is cooled and condensed, and flows down the wall of the collecting pipe 6 to the bottom of the collecting pipe 6. By opening the drain valve 66, some of the condensate can be discharged from the collecting pipe 6 through the drain pipe 65, which facilitates the treatment of condensate.

[0032] The filter box 5 is equipped with a replaceable filter element 51 filled with activated carbon. An exhaust pipe 52 connected to the inner cavity of the filter box 5 is installed on the outside of the filter box 5. A gas detection sensor 53 is installed on the outside of the exhaust pipe 52, and the detection end of the gas detection sensor 53 is located inside the exhaust pipe 52. Different types of exhaust gases are treated by the pre-set interception component 4 and condensation component in different areas and then uniformly discharged into the filter box 5. The filter element 51 in the filter box 5 adsorbs and filters the VOCs harmful gases in the exhaust gas, reducing the impact and pollution of the coating exhaust gas on the environment. The gas detection sensor 53 on the exhaust pipe 52 is used to detect the VOCs harmful gases in the exhaust gas. When the VOCs harmful gas content in the exhaust gas is abnormal, the filter element 51 in the filter box 5 is replaced, and the exhaust gas is sent to the filter box 5 for re-filtration until the exhaust gas meets the standards.

[0033] Protective frames 7, which communicate with the inner cavity of the spraying chamber 1 and the drying chamber 2, are installed on both sides of the spraying chamber 1 and near the conveying structure 3. A bellows 71, which communicate with the inner cavity of the protective frame 7, is installed on the top of the protective frame 7. Several bellows 71 are provided. An air outlet is opened at the bottom of the bellows 71. An air supply assembly 8 is installed on the outside of the spraying chamber 1 and the outside of the drying chamber 2. The air supply assembly 8 includes an air pump 81. A main pipe 82 is installed at the air outlet of the air pump 81. Several diversion pipes 83, which communicate with the inner cavity of the bellows 71, are installed on the side of the main pipe 82. When the spraying chamber 1 or the drying chamber 2 is in use, the air pump 81 is controlled to work to supply air into the main pipe 82. The air entering the main pipe 82 enters the bellows 71 through the diversion pipes 83 and is discharged through the air outlets on the side of the bellows 71 to form an air wall, reducing the leakage of harmful gases during the coating process. At the same time, air is blown into the spraying chamber 1 or the drying chamber 2 through the air outlets to facilitate the extraction and treatment of coating waste gas.

[0034] The conveying structure 3, electric telescopic rod 456, first exhaust fan 46, gas detection sensor 53, second exhaust fan 64, air pump 81, etc. used in this invention are all commonly used electronic components in the prior art. Their working methods and circuit structures are known technologies. The operation of the electronic components in this invention is controlled by setting a switch group or PLC controller outside the spraying chamber 1 or drying chamber 2. This method is a common technical means used by those skilled in the art and will not be described in detail here.

[0035] When using: During the painting process of automotive interior parts, the first exhaust fan 46 is controlled to draw air from the spraying chamber 1. The exhaust gas in the spraying chamber 1 enters the mounting box 41 through the connecting pipe 42. Several sets of intercepting plates 44 installed in the mounting box 41 intercept paint mist particles in the exhaust gas, preventing paint mist particles from entering the filter box 5 with the exhaust gas and affecting the service life of the filter box 5. At the same time, the first exhaust fan 46 is located behind the mounting box 41 to reduce the impact of paint mist particles on the use of the first exhaust fan 46 and ensure the effective use of the first exhaust fan 46. When the painting exhaust gas passes through the interceptor plate 44, the filter cloth 442 filters the paint mist particles in the painting exhaust gas, which facilitates the subsequent filtration of harmful gases in the exhaust gas. When the interceptor plate 44 intercepts and filters the paint mist particles in the exhaust gas, the electric telescopic rod 456 is controlled to drive the connecting frame 451 to move. The connecting frame 451 drives the cleaning plate 454 on the side of the mounting base 453 to move through the positioning rod 452. The cleaning plate 454 cleans the paint mist particles intercepted on the outside of the filter cloth 442, reduces the accumulation of paint mist particles on the outside of the filter cloth 442, and increases the service life of the filter cloth 442. The lower part of the filter cloth 442 in the interceptor plate 44 is immersed in the liquid, and the filter cloth 442 is wetted by capillary action, which prolongs the curing time of the paint mist particles after being filtered by the filter cloth 442, making it easier for the cleaning component 45 to clean the paint mist particles. The cleaning plate 454 in the cleaning component 45 scrapes the paint mist particles off the outside of the filter cloth 442 and collects them on the cleaning plate 454. When the cleaning plate 454 moves down into the liquid, the paint mist particles collected on the outside of the cleaning plate 454 are dispersed in the liquid by buoyancy, and the cleaning plate 454 is automatically cleaned by the liquid, which is convenient for the long-term use of the cleaning plate 454. When it is necessary to replace the liquid in the installation box 41, the drain valve 49 is opened and the liquid in the installation box 41 is discharged into the wastewater tank 47 through the drain pipe 48, which is convenient for replacing the liquid in the installation box 41. During the drying process in the drying chamber 2 after the automotive interior parts are sprayed, the second exhaust fan 64 is controlled to work, so that the exhaust pipe 63 draws air from the drying chamber 2 through the collection pipe 6, which facilitates the collection of exhaust gas in the drying chamber 2. When the high-temperature gas collected from the drying chamber 2 moves through the condenser box 61 in the collection pipe 6, the heat exchange pipe 62 installed in the condenser box 61 exchanges heat with the high-temperature exhaust gas, which facilitates the recovery and utilization of the residual heat in the exhaust gas. At the same time, the high-temperature exhaust gas is cooled down through heat exchange to avoid the high temperature affecting the subsequent treatment of the exhaust gas. The high-temperature and high-humidity gas collected from the drying chamber 2 by the collection pipe 6 is converted by the heat exchange pipe 62. The water vapor in the gas is cooled and condensed, and flows down the wall of the collection pipe 6 to the bottom of the collection pipe 6. By opening the drain valve 66, some of the condensate can be discharged from the collection pipe 6 through the drain pipe 65, which facilitates the treatment of condensate.

[0036] This environmentally friendly coating production line for automotive interior parts adopts a zoned approach to treat different types of exhaust gas. The interception components intercept paint mist particles in the exhaust gas discharged from the spraying chamber, reducing the filtration failure caused by paint mist particles clogging the filter box. Meanwhile, the exhaust gas in the drying chamber is converted by heat exchange tubes, which not only recovers and utilizes the waste heat in the exhaust gas, but also reduces the temperature of the exhaust gas and promotes the condensation of water vapor in the exhaust gas. This reduces the impact of high temperature carried by the exhaust gas on the filter box, and at the same time avoids the problem of filter element saturation failure caused by water vapor competing with activated carbon adsorption sites.

[0037] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly coating production line for automotive interior parts, characterized in that: It includes a spraying chamber (1), a drying chamber (2) and a filter box (5). A conveying structure (3) for conveying interior parts is provided between the spraying chamber (1) and the drying chamber (2). An interception component (4) for treating spraying exhaust gas is provided outside the spraying chamber (1). A condensation component for treating drying exhaust gas is provided outside the drying chamber (2). The end of the interception component (4) away from the spraying chamber (1) and the end of the condensation component away from the drying chamber (2) are both connected to the inner cavity of the filter box (5).

2. The environmentally friendly coating production line for automotive interior parts according to claim 1, characterized in that: The interception component (4) includes a mounting box (41), a connecting pipe (42) communicating with its inner cavity is installed on one side of the mounting box (41), and the other end of the connecting pipe (42) is fixed to the top of the spraying chamber (1) and communicating with the inner cavity of the spraying chamber (1). A conveying pipe (43) communicating with its inner cavity is installed on the other side of the mounting box (41), and a first exhaust fan (46) is installed on the conveying pipe (43). The end of the conveying pipe (43) away from the mounting box (41) is fixed to the outside of the filter box (5) and communicating with the inner cavity of the filter box (5). Several sets of interception plates (44) are provided inside the mounting box (41).

3. The environmentally friendly coating production line for automotive interior parts according to claim 2, characterized in that: The mounting box (41) has several mounting openings on its upper side. The interceptor plate (44) is sealed and installed in the mounting box (41) through the mounting openings. The interceptor plate (44) includes a positioning frame (441) and a filter cloth (442). The filter cloth (442) is installed between two sets of positioning frames (441) and is replaceable. A cleaning component (45) is provided in the mounting box (41) near the interceptor plate (44).

4. The environmentally friendly coating production line for automotive interior parts according to claim 3, characterized in that: The cleaning component (45) includes a connecting frame (451) disposed outside the mounting box (41) and a mounting base (453) disposed inside the mounting box (41). Several positioning rods (452) are fixed between the connecting frame (451) and the mounting base (453). The positioning rods (452) are slidably connected to the mounting box (41). A cleaning plate (454) is installed inside the mounting base (453), and the cleaning plate (454) contacts the side of the filter cloth (442). An electric telescopic rod (456) for driving the cleaning component (45) to move is installed on one side of the mounting box (41). A guide rod (455) is fixed on the side of the connecting frame (451), and the guide rod (455) is slidably connected to the outside of the mounting box (41).

5. The environmentally friendly coating production line for automotive interior parts according to claim 4, characterized in that: The bottom of the inner cavity of the installation box (41) is filled with liquid, the lower part of the interceptor plate (44) is immersed in the liquid, a wastewater tank (47) is provided outside the spraying chamber (1), a drain pipe (48) communicating with the inner cavity of the wastewater tank (47) is installed at the bottom of the installation box (41), and a drain valve (49) is installed on the drain pipe (48).

6. The environmentally friendly coating production line for automotive interior parts according to claim 1, characterized in that: The condensation assembly includes a collection pipe (6) installed on the top of the drying chamber (2) and communicating with the inner cavity of the drying chamber (2). A suction pipe (63) communicating with the inner cavity is installed on the lower side of the collection pipe (6). A second exhaust fan (64) is installed on the suction pipe (63). The end of the suction pipe (63) away from the collection pipe (6) is installed on the outside of the filter box (5) and communicating with the inner cavity of the filter box (5).

7. The environmentally friendly coating production line for automotive interior parts according to claim 6, characterized in that: A condenser box (61) is provided outside the collecting pipe (6), and a heat exchange pipe (62) is provided inside the condenser box (61) and wound around the outside of the collecting pipe (6). The inlet and outlet of the heat exchange pipe (62) are both located outside the condenser box (61).

8. The environmentally friendly coating production line for automotive interior parts according to claim 6, characterized in that: The bottom of the collection pipe (6) is equipped with a drain pipe (65) that communicates with its inner cavity, and a drain valve (66) is installed on the drain pipe (65).

9. The environmentally friendly coating production line for automotive interior parts according to claim 1, characterized in that: The filter box (5) is equipped with a replaceable filter element (51), which is filled with activated carbon. An exhaust pipe (52) communicating with the inner cavity is installed on the outside of the filter box (5). A gas detection sensor (53) is installed on the outside of the exhaust pipe (52), and the detection end of the gas detection sensor (53) is located inside the exhaust pipe (52).

10. The environmentally friendly coating production line for automotive interior parts according to claim 1, characterized in that: Protective frames (7) connected to the inner cavity are installed on both sides of the spraying chamber (1) and on both sides of the drying chamber (2) near the conveying structure (3). A bellows (71) connected to the inner cavity is installed on the top of the protective frame (7), and several bellows (71) are provided. An air outlet is opened at the bottom of the bellows (71). An air supply assembly (8) is installed on the outside of the spraying chamber (1) and the outside of the drying chamber (2). The air supply assembly (8) includes an air pump (81). A main pipe (82) is installed at the air outlet of the air pump (81). Several branch pipes (83) connected to the inner cavity of the bellows (71) are installed on the side of the main pipe (82).

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