Large component coating production line and large component coating process method

Abstract

The utility model relates to a kind of large component coating production line and large component coating process method, belong to coating process technical field, this large component coating production line includes pre-treatment equipment room, first paint spray oven, putty and polishing room, second paint spray oven, waste gas treatment equipment and conveying equipment, pre-treatment equipment room, first paint spray oven, putty and polishing room, second paint spray oven are respectively to workpiece and carry out pre-treatment, spray primer, primer drying, putty and polishing, spray finish and finish drying, waste gas treatment equipment is used to handle waste gas, conveying equipment is used to transfer workpiece.The large component coating production line and large component coating process method, workpiece can be automatically handled, avoid manual coating, avoid worker work in polluted environment, also can avoid polluting environment;Conveying equipment can conveniently make workpiece transfer between each independent room;In primer and finish coating process, adopt spray-drying integrated scheme, reduce the line investment area.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a large component coating production line and a large component coating process method. Background Technology

[0002] Construction machinery products mostly operate outdoors in harsh environments and conditions, increasing the likelihood of corrosion. Therefore, the requirements for the anti-corrosion and decorative properties of the coating are high. Furthermore, construction machinery products typically include many large structural components, some reaching tens of meters in length and weighing hundreds of tons, requiring heavy-duty overhead cranes for movement. Please refer to [reference needed]. Figure 1 Currently, for construction machinery products, the construction machinery components 91 are usually placed on tooling brackets 93 and painted manually. However, this method of operation generates significant pollution, causing considerable damage to the surrounding environment, resulting in extremely harsh working conditions for workers, and making it difficult to control the quality of the paint film and environmental protection. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a large component coating production line and a large component coating process method, which can reduce environmental pollution, improve the working environment for workers, and ensure coating effect.

[0004] This invention provides a large component coating production line, including a pretreatment equipment room, a first paint spraying and drying room, a puttying and sanding room, a second paint spraying and drying room, an exhaust gas treatment device, and a conveying device. The pretreatment equipment room is used for pretreatment of the workpiece to be coated. The first paint spraying and drying room is used for spraying primer and drying the pretreated workpiece. The puttying and sanding room is used for putting and sanding the workpiece after spraying topcoat. The second paint spraying and drying room is used for spraying topcoat and drying the topcoat. The exhaust gas treatment device is used for treating the exhaust gas generated during the spraying of primer, topcoat, puttying, and sanding processes. The conveying device is used for transferring the workpiece between the pretreatment equipment room, the first paint spraying and drying room, the puttying and sanding room, and the second paint spraying and drying room.

[0005] Optionally, the pretreatment equipment room includes a first chamber, a support assembly, a sandblasting robot, and a sandblasting device. The first chamber is used to place the workpiece. The support assembly, the sandblasting robot, and the sandblasting device are located inside the first chamber. The sandblasting robot is located on the support assembly and can be driven by the support assembly to move along two mutually perpendicular first directions, a second direction, and a third direction. The sandblasting robot is used to hold the sandblasting device. The sandblasting robot is a six-axis robot.

[0006] Optionally, the top of the first chamber is provided with an air inlet to allow air to enter, and the first chamber is under a slight negative pressure.

[0007] Optionally, the first chamber includes a main door, and the pretreatment equipment room is further provided with a control module, a first switch for opening and closing the main door, and a second switch for turning on the sandblasting equipment. The control module is used to control the second switch to automatically turn off the sandblasting equipment when the first switch controls the main door to open.

[0008] Optionally, the first chamber is further equipped with a recovery device, which includes a scraper, a belt recovery mechanism, a sand-receiving funnel, a recovery trough, a lifting device, and a material box. The sand-receiving funnel, located below the sandblasting equipment, is positioned on the floor of the first chamber and is used to receive shot that falls during sandblasting. The scraper pushes the shot in the sand-receiving funnel to its first end. Below the first end of the sand-receiving funnel is the belt recovery mechanism, which allows the shot to fall onto the belt recovery mechanism as it is pushed to the first end of the sand-receiving funnel. The belt recovery mechanism extends to the first end of the sand-receiving funnel and the recovery trough, respectively. The belt of the belt recovery mechanism reciprocates, transferring the shot on the belt to the recovery trough. The bottom of the lifting device is located within the recovery trough, and it is used to lift the shot in the recovery trough. The material box receives the shot generated by the lifting device and is connected to the sandblasting equipment to supply it with material.

[0009] Optionally, the first paint spraying booth and the second paint spraying booth are ventilated by a ventilation device, which includes a first fresh air device connected to the air inlet of the first paint spraying booth, a second fresh air device connected to the air inlet of the second paint spraying booth, a first exhaust air device connected to the first exhaust air outlet of the first paint spraying booth, and a second exhaust air device connected to the first exhaust air outlet of the second paint spraying booth. The first fresh air device is used to supply air to the first paint spraying booth when painting is carried out in the first paint spraying booth, the second fresh air device is used to supply air to the second paint spraying booth when painting is carried out in the second paint spraying booth, the first exhaust air device is used to exhaust air from the first paint spraying booth when painting is carried out in the first paint spraying booth, and the second exhaust air device is used to exhaust air from the second paint spraying booth when painting is carried out in the second paint spraying booth.

[0010] Optionally, the second exhaust vents of the first paint spraying and drying chamber and the second paint spraying and drying chamber are respectively connected to a third exhaust device and a fourth exhaust device, both of which include exhaust fans; the third exhaust device is used to exhaust air from the first paint spraying and drying chamber when drying is performed in the first paint spraying and drying chamber, and the first fresh air device and the first exhaust device are closed; the fourth exhaust device is used to exhaust air from the second paint spraying and drying chamber when drying is performed in the second paint spraying and drying chamber, and the second fresh air device and the second exhaust device are closed.

[0011] Optionally, the first exhaust vents of the first paint spraying and drying booth and the second paint spraying and drying booth are connected to the same waste gas treatment equipment, and the first exhaust device and the second exhaust device work alternately.

[0012] This invention also provides a coating process method for large components, using the aforementioned large component coating production line for coating, characterized in that the large component coating process method includes:

[0013] The workpiece is placed on the conveying equipment, which moves to transport the workpiece to the pre-processing equipment room, where the workpiece is pre-processed.

[0014] The conveying equipment transports the pre-processed workpiece to the first paint spraying and drying room, sprays primer on the workpiece, dries the primer after spraying, and the exhaust gas treatment equipment treats the exhaust air from the first paint spraying and drying room before discharging it during the primer spraying process.

[0015] The conveying equipment transports the workpiece after it has been sprayed with primer and dried to the puttying and sanding room, where the workpiece is puttyed and sanded. During the puttying and sanding process, the exhaust gas treatment equipment treats the exhaust air from the puttying and sanding room before discharging it.

[0016] The conveying equipment transports the workpiece from the putty and sanding room to the second paint spraying and drying room, and sprays the workpiece with topcoat. After spraying the topcoat, the topcoat is dried. During the topcoat spraying process, the exhaust gas treatment equipment treats the exhaust air from the second paint spraying and drying room before discharging it.

[0017] Optionally, the exhaust air from the first paint spraying booth and the second paint spraying booth is treated by the same waste gas treatment equipment, and the first paint spraying booth sprays primer while the second paint spraying booth performs topcoat drying operation, and the second paint spraying booth sprays topcoat while the first paint spraying booth performs primer drying operation.

[0018] In the large component coating production line and large component coating process provided by the embodiments of the present invention, multiple processes in the coating process are distributed in different independent rooms. Specialized equipment can be set up in each independent room to perform corresponding automated processing of the workpieces, avoiding manual coating, preventing workers from working in a polluted environment, and preventing pollution generated during the coating process from entering the environment at will, which is more environmentally friendly. In addition, the conveying equipment can facilitate the transfer of workpieces between the independent rooms. Furthermore, in the process of primer and topcoat coating, an integrated spraying and baking scheme is adopted, which reduces the area of ​​the production line. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a large component coating equipment.

[0021] Figure 2 This is a schematic diagram of the layout of a large component coating production line according to an embodiment of the present invention.

[0022] Figure 3 for Figure 2 A front view schematic diagram of the pretreatment equipment room of the medium and large component coating production line.

[0023] Figure 4 for Figure 2 A side view of the pretreatment equipment room of the medium and large component coating production line.

[0024] Figure 5 for Figure 2 A top-down view of the pretreatment equipment room and ventilation and dust removal device of the medium and large component coating production line.

[0025] Figure 6 for Figure 2 A front view schematic diagram of the conveyor equipment.

[0026] Figure 7 This is a schematic flowchart of a large component coating process according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures

[0028] air inlet 1111 Main door 1113 Support components 113 First support 1131 Second support 1133 Walking car 1135 Telescopic mechanism 1137 Sandblasting robot 115 scraper 1151 belt recycling mechanism 1153 Sand collecting funnel 1155 Recycling tank 1157 Lifting device 1159 Material box 1161 First Paint Spray Drying Room 13 Puttying and sanding room 15 Second paint spraying and drying room 17 Waste gas treatment equipment 19 Conveying equipment 21 Walking track 212 Horizontal track 2121 Longitudinal track 2123 trolley 214 base 2141 support platform 2143 Lifting mechanism 2145 Ventilation and dust removal equipment 23 Cyclone dust collector 232 Cartridge dust collector 234 Engineering machinery components 91 tooling bracket 93 Detailed Implementation

[0029] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0030] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0031] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of description and simplification, 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 the present invention.

[0032] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0033] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0034] This invention provides a large component coating production line, which can be used to coat engineering machinery such as rotary drilling rigs and excavators, as well as large components of other equipment such as automobiles, without limitation.

[0035] Please refer to Figure 2The large component coating production line provided in one embodiment of the present invention includes a pretreatment equipment room 11, a first paint spraying and drying room 13, a puttying and sanding room 15, a second paint spraying and drying room 17, an exhaust gas treatment device 19, and a conveying device 21. The pretreatment equipment room 11 is used for pretreatment of the workpiece to be coated. The first paint spraying and drying room 13 is used for spraying primer onto the pretreated workpiece and drying the primer. The puttying and sanding room 15 is used for putting on and sanding the workpiece after spraying topcoat. The second paint spraying and drying room 17 is used for spraying topcoat onto the workpiece and drying the topcoat. The exhaust gas treatment device 19 is used to treat the exhaust gas generated during the spraying of primer, topcoat, puttying, and sanding processes. The conveying device 21 is used to transfer the workpiece between the pretreatment equipment room 11, the first paint spraying and drying room 13, the puttying and sanding room 15, and the second paint spraying and drying room 17.

[0036] In this embodiment of the large component coating production line, multiple processes in the coating process are distributed in different independent rooms. Specialized equipment can be set up in each independent room to automate the processing of the workpieces, avoiding manual coating, preventing workers from working in a polluted environment, and preventing pollution generated during the coating process from entering the environment at will, which is more environmentally friendly. In addition, the conveying equipment can easily transfer the workpieces between the independent rooms. Furthermore, in the process of applying primer and topcoat, an integrated spraying and baking solution is adopted, which reduces the area of ​​the production line.

[0037] In this embodiment, the pretreatment equipment room 11, the first paint spraying and drying room 13, the puttying and sanding room 15, and the second paint spraying and drying room 17 are all enclosed spaces. Each of these rooms is equipped with a tooling bracket 211 (see...). Figure 4 The tooling bracket is used to support the workpiece. After the conveying equipment 21 transports the workpiece to the pre-processing equipment room 11, the first paint spraying and drying room 13, the puttying and sanding room 15 or the second paint spraying and drying room 17, the workpiece is placed on the tooling bracket 211 and then exited from the corresponding room.

[0038] In this embodiment, please refer to Figure 3 and Figure 4The pretreatment equipment room 11 includes a first chamber 111, a support assembly 113, a sandblasting robot 115, and sandblasting equipment. The first chamber 111 is used to place the workpiece. The support assembly 113, the sandblasting robot 115, and the sandblasting equipment are located within the first chamber 111. The sandblasting robot 115 is located on the support assembly 113 and can be moved by the support assembly 113 along three mutually perpendicular directions: a first direction (e.g., the X-axis), a second direction (e.g., the Y-axis), and a third direction (e.g., the Z-axis). The sandblasting robot 115 is used to hold the sandblasting equipment and bring it to the desired position to perform sandblasting treatment on the workpiece. Specifically, the sandblasting robot 115 can be a six-axis robot, enabling the sandblasting equipment to achieve nine degrees of freedom through the support assembly 113 and the sandblasting robot 115. The sandblasting equipment can specifically be a spray gun.

[0039] Specifically, the top of the first chamber 111 is provided with an air inlet 1111 to allow air to enter and ensure the airflow required for air circulation within the first chamber 111. The first chamber 111 can be under slight negative pressure to ensure that dust does not leak out during sandblasting. Specifically, the first chamber 111 includes structural steel and a purification panel. The structural steel forms the frame structure of the first chamber 111, and the purification panel forms the walls of the first chamber 111. The purification panel includes a steel plate, a noise reduction layer, and an inner lining plate. The steel plate, noise reduction layer, and inner lining plate are stacked to form the purification panel, and the inner lining plate is a rubber sheet located on the side facing the first chamber 111. The noise reduction layer can be filled with rock wool material.

[0040] Specifically, the first chamber 111 includes a main door 1113 for workpieces to enter the first chamber 111. The main door 1113 can also be closed during pre-processing to prevent contamination of the external environment. Specifically, the first chamber 111 also includes a side door for personnel to enter and exit.

[0041] Specifically, the pretreatment equipment room 11 is also equipped with a control module, a first switch for opening and closing the main door 1113, and a second switch for turning on the sandblasting equipment. The control module is used to control the second switch to automatically turn off the sandblasting equipment when the first switch controls the main door 1113 to open, so that the main door 1113 is interlocked with the sandblasting equipment to prevent sandblasting from being performed when the main door 1113 is open.

[0042] Specifically, the support assembly 113 includes a first bracket 1131, a second bracket 1133, a traveling trolley 1135, and a telescopic mechanism 1137. The first bracket 1131 extends along a first direction, and the second bracket 1133 extends along a second direction. The second bracket 1133 is movably mounted on the first bracket 1131 along the first direction. The traveling trolley 1135 is movably mounted on the second bracket 1133 along the second direction. The telescopic mechanism 1137 is connected to the traveling trolley 1135, and the sandblasting robot 115 is connected to the telescopic mechanism 1137. The telescopic mechanism 1137 is used to drive the sandblasting robot 115 to move along a third direction. Specifically, the first bracket 1131 can be a longitudinal gantry, and the traveling trolley 1135 can be a transverse overhead crane.

[0043] Specifically, the front and rear sides of the second support 1133 are provided with sand-sweeping devices (not shown in the figure) that can move along the first support 1131 together with the second support 1133, so as to sweep away the sand particles on the first support 1131 when the traveling trolley 1135 is traveling.

[0044] The gantry frame can be made of high-quality steel with a corrosion-resistant surface treatment. It is equipped with a maintenance ladder and a top guardrail. The cable of the sandblasting robot 115 can follow the robot on the second support 1133 via a cable trolley, moving it back, forth, left, and right to avoid instability in dusty or particulate-filled environments.

[0045] Specifically, the first chamber 111 is also equipped with a recycling device, which includes a scraper 1151, a belt recycling mechanism 1153, a sand-receiving funnel 1155, a recycling trough 1157, a lifting device 1159, and a material box 1161. A sand-receiving funnel 1155 is located on the floor of the first chamber 111, below the sand-blasting equipment, and is used to receive the shot that falls during sandblasting. The scraper 1151 pushes the shot in the sand-receiving funnel 1155 to its first end. Below the first end of the sand-receiving funnel 1155 is the belt recycling mechanism 1153. When the scraper 1151 pushes the shot to the first end of the sand-receiving funnel 1155, the shot falls onto the belt recycling mechanism 1153. The belt recovery mechanism 1153 extends to the first end of the sand receiving funnel 1155 and the recovery tank 1157, respectively. The belt of the belt recovery mechanism 1153 reciprocates, transferring the shot on the belt to the recovery tank 1157. The bottom of the lifting device 1159 is located inside the recovery tank 1157. The lifting device 1159 is used to lift the shot in the recovery tank 1157. The material box 1161 is used to receive the shot from the lifting device 1159. The material box 1161 is connected to the sandblasting equipment to supply the sandblasting equipment. Thus, the shot is recycled. Specifically, the recovery device may also include a separator and a recovery pipe. The shot lifted by the lifting device 1159 is provided to the separator, which is used to separate the shot from impurities. The shot separated from impurities falls into the recovery pipe, and the end of the recovery pipe is connected to the material box 1161. Specifically, the sand receiving funnel 1155 extends along the length of the pretreatment equipment room 11. The cross-section of the sand receiving funnel 1155 is larger at the top and smaller at the bottom, so that the falling shot can slide down the inclined surface inside the sand receiving funnel 1155 to the bottom of the sand receiving funnel 1155.

[0046] In the large component coating production line of this embodiment, a more automated sandblasting pretreatment equipment with a higher degree of automation is adopted to improve the intelligence level of the coating production line. This solves the problems of high labor intensity, difficulty in turning over workpieces, and low cleaning efficiency caused by manual sandblasting of large structural parts. By adopting robotic automatic sandblasting equipment, the surface of the workpiece is cleaned in one go, with high cleaning efficiency and good product quality consistency.

[0047] In this embodiment, a ventilation and dust removal device 23 is connected to the outside of the pretreatment equipment room 11. Please refer to... Figure 5 The ventilation and dust removal device 23 includes a cyclone dust collector 232 and a cartridge dust collector 234. The cyclone dust collector 232 is connected between the pretreatment equipment room 11 and the cartridge dust collector 234. That is, the dust discharged from the pretreatment equipment room 11 first passes through the cyclone dust collector 232, which separates the large particles in the dust and makes them sink into the dust collection hopper below (not shown). The small dust particles enter the cartridge dust collector 234 and are intercepted and filtered by the filter cartridges. The filtered fluid is discharged through the chimney in compliance with standards.

[0048] In this embodiment, the first paint spraying booth 13 and the second paint spraying booth 17 are ventilated by a ventilation device. The ventilation device includes a first fresh air device connected to the air inlet of the first paint spraying booth 13, a second fresh air device connected to the air inlet of the second paint spraying booth 17, a first exhaust air device connected to the first exhaust air outlet of the first paint spraying booth 13, and a second exhaust air device connected to the first exhaust air outlet of the second paint spraying booth 17. The first fresh air device is used to supply air to the first paint spraying booth 13 when painting is carried out in the first paint spraying booth 13, the second fresh air device is used to supply air to the second paint spraying booth 17 when painting is carried out in the second paint spraying booth 17, the first exhaust air device is used to exhaust air from the first paint spraying booth 13 when painting is carried out in the first paint spraying booth 13, and the second exhaust air device is used to exhaust air from the second paint spraying booth 17 when painting is carried out in the second paint spraying booth 17.

[0049] Specifically, both the first and second fresh air units include a blower, a dynamic pressure chamber, a static pressure chamber, and a filter layer. The dynamic pressure chamber is connected between the blower and the static pressure chamber, and the filter layer is located between the static pressure chamber and the first paint spraying booth 13 or the second paint spraying booth 17. The blower generates a large volume of fresh air. The fresh air first enters the dynamic pressure chamber from the blower, then enters the static pressure chamber, and then passes through the filter layer before entering the first paint spraying booth 13 or the second paint spraying booth 17. The fresh air, having passed through the dynamic pressure chamber, the static pressure chamber, and the filter layer sequentially, can flow evenly to the first paint spraying booth 13 or the second paint spraying booth 17.

[0050] Specifically, both the first and second exhaust systems include a grille and a filter. The grille is located between the first exhaust port of the first paint spraying booth 13 or the second paint spraying booth 17 and the filter. The exhaust air passes through the grille and the filter in sequence before being discharged.

[0051] Specifically, the second exhaust vents of the first paint spraying booth 13 and the second paint spraying booth 17 are respectively connected to a third exhaust system and a fourth exhaust system, both of which include exhaust fans. The third exhaust system is used to exhaust air from the first paint spraying booth 13 during drying, while the first fresh air system and the first exhaust system are closed. The fourth exhaust system is used to exhaust air from the second paint spraying booth 17 during drying, while the second fresh air system and the second exhaust system are closed. The air volume of the first exhaust system is greater than that of the third exhaust system, and the air volume of the second exhaust system is greater than that of the fourth exhaust system. The third or fourth exhaust system is activated during drying to control the organic matter content in the indoor air to 20%–25% of the lower explosive limit.

[0052] In this embodiment, the putty scraping and sanding chamber 15 includes an air inlet and an air outlet. A filter layer is provided at the air inlet of the putty scraping and sanding chamber 15. The air inlet of the putty scraping and sanding chamber 15 is connected to an exhaust device via a static pressure layer. When the exhaust device operates, air enters through the air inlet, and the air passing through the putty scraping and sanding chamber 15 is sent into the static pressure layer under the action of the exhaust device. The static pressure layer ensures uniform airflow and avoids the formation of localized eddies. The putty scraping and sanding chamber 15 can also be equipped with infrared lamps to dry the scraped putty.

[0053] In this embodiment, the waste gas treatment equipment 19 is equipped with an activated carbon adsorption device and a catalytic combustion (CO) device, so as to treat the waste gas (i.e. exhaust air) discharged from the first paint spraying and drying room 13, the putty and sanding room 15 and the second paint spraying and drying room 17 by using activated carbon adsorption method and catalytic combustion (CO) process respectively, so that the treated waste gas can be discharged into the environment.

[0054] Specifically, the first exhaust vents of the first paint spraying booth 13 and the second paint spraying booth 17 can be connected to the same exhaust gas treatment equipment 19. That is, the first exhaust device and the second exhaust device are connected to the same exhaust gas treatment equipment 19, which can reduce equipment investment costs and reduce the floor space required. In addition, to reduce the exhaust gas treatment and ventilation volume, the first exhaust device and the second exhaust device work alternately, so that the exhaust gas treatment equipment 19 only needs to treat the exhaust gas from one of the first paint spraying booth 13 or the second paint spraying booth 17 at any given time. Thus, when the first paint spraying booth 13 is spraying paint, the second paint spraying booth 17 is drying, and correspondingly, the first fresh air device and the first exhaust device are working, the third exhaust device is not working, the second fresh air device and the second exhaust device are not working, and the fourth exhaust device is working; when the first paint spraying booth 13 is drying, the second paint spraying booth 17 is spraying paint, and correspondingly, the first fresh air device and the first exhaust device are not working, the third exhaust device is working, the second fresh air device and the second exhaust device are working, and the fourth exhaust device is not working. Specifically, the air volume of the first fresh air unit and the first exhaust air unit, as well as the second fresh air unit and the second exhaust air unit, can be 100,000 m³ / h. 3 The output of the third and fourth exhaust systems can be 3000m³ / h or more. 3 The exhaust volume is approximately / h, meaning the exhaust volume during painting is significantly higher than that during drying. In other embodiments, the first exhaust vents of the first paint spraying booth 13 and the second paint spraying booth 17 can also be connected to two different waste gas treatment devices 19, respectively.

[0055] In this embodiment, please refer to Figure 6The conveying equipment 21 includes a traveling track 212 and a trolley 214, which can travel along the traveling track 212. The traveling track 212 connects the pretreatment equipment room 11, the first paint spraying and drying room 13, the putty and sanding room 15, and the second paint spraying and drying room 17, so that the trolley 214 can reach the pretreatment equipment room 11, the first paint spraying and drying room 13, the putty and sanding room 15, and the second paint spraying and drying room 17.

[0056] Specifically, the trolley 214 includes a base 2141, a support platform 2143, and a lifting mechanism 2145. The two ends of the lifting mechanism 2145 are connected to the base 2141 and the support platform 2143 respectively. The lifting mechanism 2145 can extend and retract, thereby causing the support platform 2143 to rise and fall relative to the base 2141. When the conveying device 21 transfers the workpiece, the workpiece is supported on the support platform 2143. After the conveying device 21 transfers the workpiece above the tooling bracket 211, the lifting mechanism 2145 lowers the support platform 2143, causing the workpiece to fall onto the tooling bracket 211. The lifting mechanism 2145 then continues to lower the support platform 2143, causing the workpiece to detach from the trolley 214. After the workpiece is processed in a certain room, the trolley 214 can move under the workpiece and raise the support platform 2143 using the lifting mechanism 2145, thereby lifting the workpiece and detaching it from the tooling bracket 211. The workpiece is then carried by the trolley 214.

[0057] Specifically, the travel track 212 includes a transverse track 2121 and a longitudinal track 2123 that are perpendicular to each other. The bottom of the trolley 214 is provided with a first traveling part and a second traveling part that are perpendicular to each other. The first traveling part and the second traveling part are used to cooperate with the transverse track 2121 and the longitudinal track 2123 respectively, so that the trolley 214 can travel laterally and longitudinally without the need for steering control. Specifically, the travel track 212 forms a "well" shaped structure.

[0058] This invention also provides a coating process for large components, using the aforementioned large component coating production line. Please refer to [link / reference needed]. Figure 7 One embodiment of the large component coating process includes the following methods:

[0059] S11, the workpiece is placed on the trolley 214 of the conveying equipment 21. The trolley 214 moves to transport the workpiece to the pre-processing equipment room 11, where the workpiece is pre-processed.

[0060] S13, the conveying equipment 21 transports the pre-processed workpiece to the first paint spraying and drying chamber 13, and sprays primer onto the workpiece. After spraying the primer, the primer is dried. During the primer spraying process, the exhaust gas treatment equipment 19 treats the exhaust air from the first paint spraying and drying chamber 13 before discharging it. Specifically, a water-based paint coating process can be used to spray the primer.

[0061] Specifically, during the primer spraying process, before the exhaust gas is treated by the exhaust gas treatment equipment 19, a first fresh air device supplies air to the first paint spraying and drying chamber 13, and a first exhaust air device exhausts air from the first paint spraying and drying chamber 13. At this time, the air volume is a large volume, for example, up to 100,000 m³ / h. 3 / h or more; during the primer drying process, a third exhaust fan is used to exhaust air from the first paint spraying and drying chamber 13. At this time, the air volume is relatively small, for example, 3000m³ / h. 3 / h or so.

[0062] S15, the conveying equipment 21 transports the workpiece after the primer is sprayed and dried to the puttying and sanding room 15, and performs puttying and sanding on the workpiece. During the puttying and sanding process, the exhaust gas treatment equipment 19 treats the exhaust air from the puttying and sanding room 15 before discharging it.

[0063] S17, the conveying equipment 21 transports the workpiece from the putty and sanding room 15 to the second paint spraying and drying room 17, and sprays the workpiece with topcoat. After spraying the topcoat, the topcoat is dried. During the topcoat spraying process, the exhaust gas treatment equipment 19 treats the exhaust air from the second paint spraying and drying room 17 before discharging it. Specifically, a water-based paint coating process can be used to spray the topcoat.

[0064] Specifically, during the topcoat spraying process, a second fresh air unit supplies air to the second paint spraying and drying chamber 17 before the exhaust air is treated by the waste gas treatment equipment 19, and a second exhaust air unit exhausts air from the second paint spraying and drying chamber 17. At this time, the air volume is a large volume, for example, up to 100,000 m³ / h. 3 / h or more; during the topcoat drying process, a fourth exhaust fan is used to exhaust air from the second paint spraying and drying chamber 17. At this time, the air volume is relatively small, for example, 3000m³ / h. 3 / h or so.

[0065] S19, the conveyor 21 transports the workpiece out of the second paint spraying booth 17 and removes the workpiece from the conveyor 21.

[0066] In this embodiment, after the conveying equipment 21 transports the workpiece to the pre-processing equipment room 11, the first paint spraying and drying room 13, the puttying and sanding room 15 or the second paint spraying and drying room 17, it places the workpiece on the tooling bracket 211 in each sub-room and then exits from the corresponding room before closing each room for corresponding processing.

[0067] In this embodiment, the exhaust air from the first paint spraying booth 13 and the second paint spraying booth 17 is treated by the same waste gas treatment device 19. While the primer is being sprayed in the first paint spraying booth 13, the topcoat is being dried in the second paint spraying booth 17; conversely, while the topcoat is being sprayed in the second paint spraying booth 17, the primer is being dried in the first paint spraying booth 13. In other words, the waste gas treatment device 19 only needs to treat the exhaust air from one paint spraying booth 17 at a time. This reduces equipment investment costs and floor space requirements, while also reducing the amount of waste gas to be treated and the exhaust volume.

[0068] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A large component coating production line, characterized in that, The system includes a pretreatment equipment room (11), a first paint spraying and drying room (13), a puttying and sanding room (15), a second paint spraying and drying room (17), an exhaust gas treatment device (19), and a conveying device (21). The pretreatment equipment room (11) is used to pretreat the workpiece to be coated. The first paint spraying and drying room (13) is used to spray primer and dry the primer on the pretreated workpiece. The puttying and sanding room (15) is used to putty and sand the workpiece after spraying topcoat. The second paint spraying and drying room (17) is used to spray topcoat and dry the topcoat on the workpiece. The exhaust gas treatment device (19) is used to treat the exhaust gas generated during the spraying of primer, topcoat, puttying, and sanding. The conveying device (21) is used to transfer the workpiece between the pretreatment equipment room (11), the first paint spraying and drying room (13), the puttying and sanding room (15), and the second paint spraying and drying room (17). The pretreatment equipment room (11) includes a first chamber (111), a support assembly (113), a sandblasting robot (115), and a sandblasting device. The first chamber (111) is used to place workpieces. The support assembly (113), the sandblasting robot (115), and the sandblasting device are located in the first chamber (111). The sandblasting robot (115) is located on the support assembly (113), and the sandblasting robot (115) can be driven by the support assembly (113) to move along two mutually perpendicular first directions, second directions, and third directions. The sandblasting robot (115) is used to hold the sandblasting device. The sandblasting robot (115) is a six-axis robot. The first chamber (111) has an air inlet (1111) at the top to allow air to enter, and the first chamber (111) is under a slight negative pressure. The first chamber (111) includes a main door (1113). The pretreatment equipment room (11) is also equipped with a control module, a first switch for opening and closing the main door (1113), and a second switch for turning on the sandblasting equipment. The control module is used to control the second switch to automatically turn off the sandblasting equipment when the first switch controls the main door (1113) to open. The first chamber (111) is also equipped with a recycling device, which includes a scraper (1151), a belt recycling mechanism (1153), a sand-receiving funnel (1155), a recycling trough (1157), a lifting device (1159), and a material box (1161). The sand-receiving funnel (1155) is located on the ground of the first chamber (111) below the sandblasting equipment. The sand-receiving funnel (1155) is used to receive the shot that falls during sandblasting. The scraper (1151) is used to push the shot in the sand-receiving funnel (1155) to the first end of the sand-receiving funnel (1155). The belt recycling mechanism (1153) is located below the first end of the sand-receiving funnel (1155). The scraper (1151) is used to push the shot to... At the first end of the sand receiving funnel (1155), the shot falls onto the belt recovery mechanism (1153); the two ends of the belt recovery mechanism (1153) extend to the first end of the sand receiving funnel (1155) and the recovery trough (1157) respectively, and the belt of the belt recovery mechanism (1153) reciprocates to transfer the shot on the belt to the recovery trough (1157); the bottom of the lifting device (1159) is located in the recovery trough (1157), and the lifting device (1159) is used to lift the shot in the recovery trough (1157); the material box (1161) is used to receive the shot operated by the lifting device (1159), and the material box (1161) is connected to the sandblasting equipment to supply the sandblasting equipment.

2. The large component coating production line as described in claim 1, characterized in that, The first paint spraying booth (13) and the second paint spraying booth (17) are ventilated by a ventilation device, which includes a first fresh air device connected to the air inlet of the first paint spraying booth (13), a second fresh air device connected to the air inlet of the second paint spraying booth (17), a first exhaust air device connected to the first exhaust air outlet of the first paint spraying booth (13), and a second exhaust air device connected to the first exhaust air outlet of the second paint spraying booth (17). The first fresh air device is used to supply air to the first paint spraying booth (13) when painting is carried out in the first paint spraying booth (13), the second fresh air device is used to supply air to the second paint spraying booth (17) when painting is carried out in the second paint spraying booth (17), the first exhaust air device is used to exhaust air from the first paint spraying booth (13) when painting is carried out in the first paint spraying booth (13), and the second exhaust air device is used to exhaust air from the second paint spraying booth (17) when painting is carried out in the second paint spraying booth (17).

3. The large component coating production line as described in claim 2, characterized in that, The second exhaust vents of the first paint spraying and drying chamber (13) and the second paint spraying and drying chamber (17) are respectively connected to a third exhaust device and a fourth exhaust device. The third exhaust device and the fourth exhaust device both include exhaust fans. The third exhaust device is used to exhaust air from the first paint spraying and drying chamber (13) when drying in the first paint spraying and drying chamber (13), and the first fresh air device and the first exhaust device are closed. The fourth exhaust device is used to exhaust air from the second paint spraying and drying chamber (17) when drying in the second paint spraying and drying chamber (17), and the second fresh air device and the second exhaust device are closed.

4. The large component coating production line as described in claim 2, characterized in that, The first exhaust vents of the first paint spraying and drying chamber (13) and the second paint spraying and drying chamber (17) are connected to the same waste gas treatment device (19), and the first exhaust device and the second exhaust device work alternately.

5. A coating process for large components, wherein the coating is performed using the large component coating production line as described in any one of claims 1-4, characterized in that, The coating process for the large components includes: The workpiece is placed on the conveying device (21), which moves to transport the workpiece to the pre-processing equipment room (11) and pre-processes the workpiece in the pre-processing equipment room (11). The conveying equipment (21) transports the pre-processed workpiece to the first paint spraying and drying room (13) and sprays primer on the workpiece. After spraying primer, the primer is dried. During the process of spraying primer, the exhaust gas treatment equipment (19) treats the exhaust air of the first paint spraying and drying room (13) and then discharges it. The conveying equipment (21) transports the workpiece after it has been sprayed with primer and dried to the puttying and sanding room (15) and puts and sands the workpiece. During the puttying and sanding process, the exhaust gas treatment equipment (19) treats the exhaust gas from the puttying and sanding room (15) and then discharges it. The conveying equipment (21) transports the workpiece from the putty and sanding room (15) to the second paint spraying and drying room (17) and sprays the workpiece with topcoat. After spraying the topcoat, the topcoat is dried. During the topcoat spraying process, the exhaust gas treatment equipment (19) treats the exhaust air from the second paint spraying and drying room (17) and then discharges it.

6. The coating process method for large components as described in claim 5, characterized in that, The exhaust air of the first paint spraying booth (13) and the second paint spraying booth (17) is treated by the same waste gas treatment equipment (19). While the primer is being sprayed in the first paint spraying booth (13), the topcoat is being dried in the second paint spraying booth (17). While the topcoat is being sprayed in the second paint spraying booth (17), the primer is being dried in the first paint spraying booth (13).

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