A coating machine with controllable coating thickness for desulfurization outboard pipe guide and its application method

Abstract

This invention discloses a coating machine with controllable coating thickness for a desulfurization outboard pipe guide and its usage method, relating to the field of coating machine technology. It includes a coating machine body, a multi-axis motion platform, and a coating spray gun. The coating machine body internally houses a deep-cavity coating mechanism and a detection mechanism. In use, a first electric push rod pushes an L-shaped compensating nozzle downwards, and a forward / reverse motor drives the L-shaped compensating nozzle to rotate below the coating spray gun. Then, the first electric push rod pulls a rotating frame upwards, causing a quick-connect fitting onto the outer surface of a quick-connect ring. Through the insertion of the quick-connect post and quick-connect groove, a rapid connection between the L-shaped compensating nozzle and the coating spray gun is achieved, overcoming the limitations of the coating spray gun's nozzle length and installation posture. The L-shaped compensating nozzle, with its corner structure, can flexibly adapt to the depth of the guide's inner cavity, extending smoothly into the deep inner cavity, eliminating blind spots in the inner cavity coating, and achieving full-area coating of the guide's inner cavity wall.

Description

Technical Field

[0001] This invention relates to the field of coating machine technology, specifically to a coating machine for desulfurization outboard pipe guide with controllable coating thickness and its usage method. Background Technology

[0002] A coating machine is a precision device used to uniformly apply functional or protective materials to the surface of a substrate. Its core function is to precisely control the coating thickness, uniformity, and coverage area to ensure product consistency and reliability. It is widely used in electronics, new energy, and shipbuilding industries. Desulfurization outboard tube guides are constantly immersed in highly corrosive seawater and are susceptible to electrochemical corrosion, erosion, and biofouling. Applying a coating using a coating machine can achieve a high-density, uniform anti-corrosion / wear-resistant coating, isolating corrosive media and extending the service life of the desulfurization outboard tube guides.

[0003] In existing technologies, the inner cavity of the desulfurization outboard pipe guide usually has a certain depth. Most of the spray guns of existing coating machines are downward coating, and the length of the spray nozzle is limited. When coating the inner wall of the guide, the spray gun cannot penetrate deep into the inner cavity of the guide, resulting in coating blind spots. This leads to incomplete coating coverage, reduced coating effect, and missed or thin coating on the inner wall of the guide. It is impossible to form a complete and uniform anti-corrosion coating, which affects the service life of the guide.

[0004] Therefore, we propose a coating machine with controllable coating thickness for desulfurization outboard pipe guides and its application method to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a coating machine with controllable coating thickness for desulfurization outboard pipe guides and its usage method, in order to solve the problem mentioned in the background art that the straight nozzle of the coating machine spray gun has a limited length, which cannot penetrate deep into the inner cavity of the guide, resulting in coating blind spots, incomplete coating coverage, affecting the coating effect, and reducing the service life of the guide.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coating machine with controllable coating thickness for a desulfurization outboard pipe guide, comprising a coating machine body, a multi-axis motion platform and a coating spray gun, wherein the coating machine body is provided with a deep cavity coating mechanism and a detection mechanism inside; The deep cavity coating mechanism includes a first electric push rod, with a fixed base fixedly installed at the bottom end of the first electric push rod. A forward and reverse motor is fixedly installed inside the fixed base, and a rotating frame is fixedly installed at the output end of the forward and reverse motor. A pneumatic gripper is fixedly installed on the outer surface of the rotating frame, and a quick connector is provided inside the pneumatic gripper. An L-shaped compensating nozzle is fixedly connected to the bottom of the quick connector. The L-shaped compensating nozzle is quickly installed to the bottom end of the coating spray gun through the quick connector, extending the length of the coating spray gun nozzle. Taking advantage of the L-shaped corner of the L-shaped compensating nozzle, it penetrates deep into the inner cavity of the guide tube for comprehensive coating.

[0007] Preferably, a quick-connect ring is fixedly installed on the outer surface of the bottom end of the coating spray gun. The outer surface of the quick-connect ring has multiple quick-connect grooves. A sealing gasket is fixedly connected to one inner wall of the quick connector. An annular groove is opened inside the quick connector. An electromagnet is fixedly installed on the inner wall of the annular groove. Multiple movable holes are opened at the top surface of the inner wall of the quick connector. A quick-connect post is movably embedded inside each of the multiple movable holes.

[0008] Preferably, a metal block is fixedly installed at one end of each of the multiple quick-connect pins, a spring is movably sleeved on the outer surface of each of the multiple quick-connect pins, a conductive groove is formed on the outer surface of the quick-connect pin, a conductive sleeve is fixedly installed inside the conductive groove, a conductive contact is fixedly installed inside the pneumatic gripper, and the outer surface of the conductive contact is in contact with the inner wall of the conductive sleeve.

[0009] Preferably, each of the plurality of movable holes has two limiting blocks fixedly installed inside, each of the plurality of quick-connect pins has two limiting grooves on its outer surface, the outer surfaces of the plurality of limiting blocks are respectively movably embedded in the plurality of limiting grooves, one end of each of the plurality of springs is fixedly connected to one side of the outer surface of the plurality of metal blocks, and the other end of each of the plurality of springs is fixedly installed on the other side of the inner wall of the annular groove.

[0010] Preferably, the detection mechanism includes a detection component and a moving component. The detection component includes a laser confocal thickness gauge main unit and a laser confocal probe. The laser confocal thickness gauge main unit is installed on the front surface of the moving plate near the coating spray gun. The laser confocal probe is located beside the bottom end of the coating spray gun, maintaining a certain lag distance from the coating spray gun to avoid the spray mist area, and moves synchronously with the coating spray gun. It is used to perform non-contact real-time thickness detection on the coating that has just been coated and has been initially leveled.

[0011] Preferably, the moving component includes a second electric actuator, a connecting block is fixedly installed at the bottom of the second electric actuator, a U-shaped block is fixedly installed inside the connecting block, a miniature electric actuator is fixedly installed inside the U-shaped block, a support frame is fixedly installed at one end of the miniature electric actuator, a miniature motor is fixedly installed inside the support frame, and a flipping block is fixedly installed at the output end of the miniature motor.

[0012] Preferably, the outer surface of the laser confocal probe is fixedly installed inside the flipping block. The laser confocal probe is rotated by a moving component and moves in coordination with the movement to maintain a relative height with the bottom end of the L-shaped compensation nozzle after quick connection, so as to detect the coating thickness of the inner wall of the guide tube in real time in a staggered position.

[0013] Preferably, the coating machine body has a rotating platform inside, a pneumatic gripper disk on the top of the rotating platform, a warning light on the top of the coating machine body, a motion plate on the outer surface of the multi-axis motion platform, the coating spray gun mounted on the front surface of the motion plate, and the outer surface of the second electric push rod mounted on the front surface of the motion plate via an auxiliary block.

[0014] Preferably, support blocks are fixedly installed at the top and bottom of the U-shaped block, two support rods are fixedly installed on the rear surface of the support frame, one end of each support rod extends movably through to the outer surface of the two support blocks, an mounting plate is fixedly installed on the outer surface of the first electric push rod, the mounting plate is installed on the outer surface of the multi-axis motion platform by bolts, and the output end of the forward and reverse motor extends movably through to the bottom of the fixed seat.

[0015] A method for using a coating machine with controllable coating thickness for a desulfurization outboard pipe guide includes the following steps: S1. A precision metering pump stabilizes the paint flow rate, a pressure regulating valve adjusts the spraying pressure, and a PLC control system controls the movement speed of a multi-axis motion platform, which then sprays the paint through a coating spray gun. A laser confocal probe moves synchronously with the coating spray gun to perform non-contact real-time thickness detection on the newly coated coating. S2, the PLC control system receives the measured coating thickness value output by the laser confocal probe in real time, compares the measured thickness value with the preset target thickness value to calculate the thickness deviation, and automatically adjusts the spraying flow rate, spraying pressure and moving speed of the motion mechanism in real time according to the thickness deviation, so that the coating thickness is always stable within the target range, and high-precision closed-loop coating is achieved. S3. The first electric push rod pushes the L-shaped compensating nozzle downward, and the forward and reverse motors drive the L-shaped compensating nozzle to rotate to the bottom of the coating spray gun. Then the first electric push rod pulls the rotating frame upward, so that the quick connector is fitted onto the outer surface of the quick connector ring. S4. During this process, the quick-connect post is forced to move into the annular groove, pushing the metal block to pull the spring open. When the quick-connect post moves to the quick-connect groove, the spring drives the quick-connect post to insert into the quick-connect groove, completing the quick connection between the L-shaped compensation nozzle and the coating spray gun. Then the pneumatic gripper is released, and the forward and reverse motors drive the open pneumatic gripper to rotate in the opposite direction and leave, without affecting the subsequent coating work. S5. Next, the micro motor drives the flipping block to rotate, causing the laser confocal probe to rotate 90 degrees. The micro electric push rod pulls the support frame and the laser confocal probe to move backward a short distance together, so that the laser confocal probe is misaligned with the nozzle of the coating spray gun. S6. The second electric push rod pushes the laterally offset laser confocal probe downward to a position that matches the height of the bottom end of the L-shaped compensation nozzle, so that the laser confocal probe and the L-shaped compensation nozzle are aligned in the same direction, and follow the coating spray gun to detect the thickness of the inner wall of the guide tube.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the first electric push rod pushes the L-shaped compensating nozzle downwards, and the forward and reverse motors drive the L-shaped compensating nozzle to rotate below the coating spray gun. Then, the first electric push rod pulls the rotating frame upwards, so that the quick connector is fitted onto the outer surface of the quick-connect ring. Through the insertion of the quick-connect post and the quick-connect groove, the L-shaped compensating nozzle and the coating spray gun are quickly connected, extending the overall length of the coating spray gun nozzle and breaking through the limitations of the length and installation posture of the coating spray gun nozzle. With its corner structure, the L-shaped compensating nozzle can flexibly adapt to the depth of the guide tube cavity and extend smoothly into the depth of the cavity, eliminating the blind spots of the cavity coating and achieving full-area coating of the inner wall of the guide tube without manual touch-up. This realizes fully automated operation of the guide tube cavity coating and greatly improves production efficiency.

[0017] 2. In use, the pneumatic gripper re-clamps the quick connector, while the conductive contact contacts the conductive sleeve. Then, energizing the electromagnet causes the magnetic force to attract and move the metal block, pulling the quick connector pin out of the quick connector slot. Finally, the first electric push rod pushes the quick connector away from the bottom of the coating spray gun, thus achieving quick disassembly of the L-shaped compensating nozzle. The L-shaped compensating nozzle adopts a quick-plug structure design, sharing the same feeding and metering system with the original coating spray gun. This avoids fluctuations in coating thickness and performance caused by differences in parameters of different feeding systems, ensuring uniform coating quality on the outer surface and inner wall of the guide tube.

[0018] 3. In use, the micro motor drives the laser confocal probe to rotate 90 degrees. The micro electric push rod pulls the laser confocal probe to move and offset it from the nozzle position of the coating spray gun. The second electric push rod pushes the laser confocal probe to a position that matches the height of the bottom end of the L-shaped compensating nozzle. At this time, the laser confocal probe and the L-shaped compensating nozzle maintain the same orientation, closely follow the spraying trajectory to accurately detect the coating thickness of the inner cavity wall. In conjunction with the PLC control system, closed-loop control of the deep cavity inner wall coating is achieved, ensuring that the coating thickness of the deep cavity inner wall is always stable within the preset range, thus comprehensively improving the coating accuracy of the product.

[0019] 4. When using this invention, the laser confocal probe moves synchronously with the coating spray gun to perform non-contact real-time thickness detection on the newly coated coating. The PLC control system automatically adjusts the spray flow rate, spray pressure, and moving speed of the motion mechanism in real time according to the thickness deviation. Through real-time feedback and real-time correction, the coating thickness is kept stable within the target range, achieving high-precision closed-loop coating. The thickness accuracy is significantly improved, the thickness fluctuation is greatly reduced, offline sampling inspection is not required, rework and scrap are reduced, and production efficiency and product qualification rate are improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the coating machine body in the desulfurization outboard pipe guide coating thickness controllable coating machine of the present invention; Figure 3 This is a schematic diagram of the multi-axis motion platform in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 4 This is a schematic diagram of the deep cavity coating mechanism in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 5 This is a schematic diagram of the coating spray gun in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 6 This is a schematic diagram of the moving component in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 7 This is a schematic diagram showing the structure of the connecting block in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention. Figure 8 This is a schematic diagram of the rotating frame in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 9 This is a cross-sectional schematic diagram of the quick connector in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 10 This is a schematic diagram showing the structure of the quick-connect column in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 11 This is a schematic diagram of the quick-connect ring in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention; Figure 12 This is a schematic diagram of the installation structure of the L-shaped compensating nozzle in a coating machine for a desulfurization outboard pipe guide with controllable coating thickness according to the present invention.

[0021] In the picture: 1. Coating machine body; 2. Multi-axis motion platform; 3. Motion plate; 4. Coating spray gun; 41. Quick-connect ring; 42. Quick-connect groove; 5. Deep cavity coating mechanism; 501. First electric push rod; 502. Fixed base; 503. Forward and reverse motor; 504. Rotating frame; 505. Pneumatic gripper; 506. Quick connector; 507. L-shaped compensating spray nozzle; 508. Conductive groove; 509. Conductive sleeve; 510. Annular groove; 511. Electromagnet; 512. Movable hole; 513. Quick-connect post; 514. Metal block; 515. Spring; 516. Limiting block; 5 17. Limiting groove; 518. Sealing gasket; 519. Conductive contact; 520. Mounting plate; 6. Detection mechanism; 61. Detection component; 6101. Laser confocal thickness gauge main unit; 6102. Laser confocal probe; 62. Moving component; 6201. Second electric actuator; 6202. Connecting block; 6203. U-shaped block; 6204. Miniature electric actuator; 6205. Support frame; 6206. Miniature motor; 6207. Tilting block; 6208. Support block; 6209. Support rod; 7. Rotating platform; 8. Pneumatic gripper; 9. Warning light. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figures 1-12As shown, the present invention provides a technical solution: a coating machine with controllable coating thickness for a desulfurization outboard pipe guide, comprising a coating machine body 1, a multi-axis motion platform 2, and a coating spray gun 4. The coating machine body 1 is internally provided with a deep cavity coating mechanism 5 and a detection mechanism 6. The deep cavity coating mechanism 5 includes a first electric push rod 501, a fixed base 502 fixedly installed at the bottom end of the first electric push rod 501, a forward and reverse motor 503 fixedly installed inside the fixed base 502, a rotating frame 504 fixedly installed at the output end of the forward and reverse motor 503, a pneumatic gripper 505 fixedly installed on the outer surface of the rotating frame 504, a quick connector 506 provided inside the pneumatic gripper 505, an L-shaped compensation nozzle 507 fixedly connected to the bottom of the quick connector 506, the L-shaped compensation nozzle 507 being quickly installed to the bottom end of the coating spray gun 4 through the quick connector 506, extending the length of the nozzle of the coating spray gun 4, and utilizing the L-shaped corner advantage of the L-shaped compensation nozzle 507 to penetrate deep into the inner cavity of the guide for comprehensive coating. A quick-connect ring 41 is fixedly installed on the outer surface of the bottom end of the coating spray gun 4. Multiple quick-connect grooves 42 are formed on the outer surface of the quick-connect ring 41. A sealing gasket 518 is fixedly connected to the inner wall of one side of the quick connector 506. An annular groove 510 is formed inside the quick connector 506. An electromagnet 511 is fixedly installed on the inner wall of the annular groove 510. Multiple movable holes 512 are formed on the top surface of the inner wall of the quick connector 506. Quick-connect posts 513 are movably embedded inside each of the multiple movable holes 512. A metal block 514 is fixedly installed at one end of each of the multiple quick-connect posts 513. A spring 515 is movably sleeved on the outer surface of each of the multiple quick-connect posts 513. A conductive groove 508 is formed on the outer surface of the quick connector 506. A conductive sleeve 509 is fixedly installed inside the conductive groove 508. A conductive contact 519 is fixedly installed inside the pneumatic gripper 505. The outer surface of the conductive contact 519 is in contact with the inner wall of the conductive sleeve 509. Each of the multiple movable holes 512 has two fixedly installed limit blocks 516 inside. Each of the multiple quick-connect pins 513 has two limit grooves 517 on its outer surface. The outer surfaces of the multiple limit blocks 516 are movably embedded inside the multiple limit grooves 517. One end of each of the multiple springs 515 is fixedly connected to one side of the outer surface of each of the multiple metal blocks 514, and the other end of each of the multiple springs 515 is fixedly installed on the other side of the inner wall of the annular groove 510. A motion plate 3 is provided on the outer surface of the multi-axis motion platform 2. A coating spray gun 4 is installed on the front surface of the motion plate 3. The outer surface of the second electric push rod 6201 is installed on the front surface of the motion plate 3 via an auxiliary block. Support blocks 6208 are fixedly installed on the top and bottom of the U-shaped block 6203. Two support rods 6209 are fixedly installed on the rear surface of the support frame 6205. One end of each support rod 6209 extends through the outer surface of the two support blocks 6208. An mounting plate 520 is fixedly installed on the outer surface of the first electric push rod 501. The mounting plate 520 is bolted to the outer surface of the multi-axis motion platform 2. The output end of the forward and reverse motor 503 extends through the bottom of the fixed seat 502.

[0024] In this embodiment, during use, the first electric actuator 501 is activated, pushing the fixed base 502, rotating frame 504, and L-shaped compensating nozzle 507 downwards, so that the height of the quick connector 506 is lower than the bottom of the coating spray gun 4. Then, the forward / reverse motor 503 is activated, driving the rotating frame 504 to rotate towards the coating spray gun 4. When the forward / reverse motor 503 automatically shuts off, the pneumatic gripper 505 drives the quick connector 506 and L-shaped compensating nozzle 507 to rotate directly below the coating spray gun 4. Then, the first electric actuator 501 pulls the fixed base 502 upwards, causing the rotating frame 504 and pneumatic gripper 505 to move upwards, so that the quick connector 506 is fitted upwards onto the outer surface of the quick-connect ring 41. The structure of the quick-connect ring 41 is as follows... Figure 11 As shown, the quick-connectors are arranged in a conical shape. During the connection process, multiple quick-connect pins 513 move upward from the bottom of the quick-connect ring 41, contact the outer surface of the quick-connect ring 41, and are forced to move into the annular groove 510, pushing the metal block 514 towards the electromagnet 511. At the same time, the spring 515 is pulled open. When the quick-connect pins 513 move to the quick-connect groove 42, they lose their thrust, the spring 515 rebounds, pulls the metal block 514 to move, and pushes the quick-connect pins 513 into the quick-connect groove 42, completing the quick connection between the quick connector 506 and the quick-connect ring 41. At this time, the L-shaped compensating nozzle 507 is connected to the bottom end of the coating spray gun 4, and the sealing gasket 518 tightly wraps around the outer surface of the bottom end of the coating spray gun 4 to achieve a seal. After the L-shaped compensating nozzle 507 is connected via quick-connect, the pneumatic gripper 505 activates, releasing its grip on the quick connector 506 and opening to its maximum extent. Simultaneously, the conductive contact 519 disengages from the conductive sleeve 509. Then, the forward / reverse motor 503 drives the rotating frame 504 to move in the opposite direction, causing the opened pneumatic gripper 505 to rotate in the opposite direction and disengage from the quick connector 506, without affecting subsequent coating operations. The bottom end of the L-shaped compensating nozzle 507 is angled, such as... Figure 8 As shown, the deep cavity coating mechanism 5 extends the overall length of the coating gun 4 nozzle by quickly installing an L-shaped compensating nozzle 507 into the coating gun 4, overcoming the limitations of nozzle length and installation posture. The L-shaped compensating nozzle 507, with its corner structure, can flexibly adapt to the depth of the guide vane's inner cavity, extending smoothly into the depths of the inner cavity, eliminating blind spots in the inner cavity coating, and achieving full-area, dead-angle-free coating of the guide vane's inner cavity wall. This ensures a complete and continuous anti-corrosion coating on the inner cavity wall, guaranteeing the overall anti-corrosion performance of the guide vane, extending its service life, and eliminating the need for manual touch-ups. It achieves fully automated coating of the guide vane's inner cavity, significantly improving production efficiency. This solves the problem that the limited length of the straight nozzle of the coating machine's spray gun prevents it from reaching deep into the guide vane's inner cavity, resulting in blind spots, incomplete coating coverage, affecting the coating effect, and reducing the guide vane's service life.

[0025] Furthermore, the forward and reverse motors 503 drive the rotating frame 504 to rotate again, causing the unfolded pneumatic gripper 505 to rotate back to the quick connector 506. The pneumatic gripper 505 is then activated to clamp the quick connector 506 again, and at the same time, the conductive contact 519 contacts the conductive sleeve 509 again. Then, the electromagnet 511 is energized through the conductive contact 519 and the conductive sleeve 509, generating magnetism. This attracts the metal block 514, which moves towards the electromagnet 511 and pulls the quick connector pin 513 away from the quick connector slot 42. Finally, the output end of the first electric push rod 501 moves downward, causing the quick connector 506 to leave the bottom of the coating spray gun 4, thus realizing the quick release of the L-shaped compensation nozzle 507. The L-type compensating nozzle 507 can be quickly installed and disassembled without requiring significant modifications to the overall structure of the original coating machine. In addition, the L-type compensating nozzle 507 has different length specifications, and the corresponding length specification of the L-type compensating nozzle 507 can be selected according to the inner cavity depth of the guide tube for quick installation. It has strong adaptability and reduces the cost of equipment upgrades and modifications.

[0026] Furthermore, the L-shaped compensating nozzle 507 adopts a quick-plug structure design and shares the same feeding and metering system with the original coating spray gun 4. This ensures that the coating supply pressure, flow rate, viscosity and other parameters of the two nozzles are completely consistent, avoiding fluctuations in coating thickness and performance caused by differences in parameters of different feeding systems. It ensures uniform coating quality on the outer surface of the guide and the inner wall of the cavity, meeting the overall performance requirements of the anti-corrosion coating. There is no need to equip different models of spray guns and two feeding and metering systems, reducing equipment procurement costs.

[0027] Example 2: Figures 2-5 and Figure 12 As shown, the coating machine body 1 is equipped with a deep cavity coating mechanism 5 and a detection mechanism 6. The coating machine body 1 is equipped with a rotating platform 7. A pneumatic gripper 8 is installed on the top of the rotating platform 7. A warning light 9 is installed on the top of the coating machine body 1. A motion plate 3 is installed on the outer surface of the multi-axis motion platform 2. The detection mechanism 6 includes a detection component 61 and a moving component 62. The detection component 61 includes a laser confocal thickness gauge host 6101 and a laser confocal probe 6102. The laser confocal thickness gauge host 6101 is installed on the front surface of the moving plate 3 near the coating spray gun 4. The laser confocal probe 6102 is located on the side of the bottom end of the coating spray gun 4, maintaining a certain lag distance from the coating spray gun 4 to avoid the spray mist area, and moves synchronously with the coating spray gun 4. It is used to perform non-contact real-time thickness detection on the coating that has just been coated and has been initially leveled.

[0028] In this embodiment, during use, the coating machine body 1 includes a corrosion-resistant paint tank, a precision metering pump, a feeding pipe, a pressure regulating valve, an exhaust gas treatment system, and a PLC control system. The precision metering pump is connected to the coating spray gun 4 via the feeding pipe. The precision metering pump stabilizes the paint flow rate, the pressure regulating valve regulates the spraying pressure, and the PLC control system controls the movement speed and number of spray passes of the multi-axis motion platform 2. The guide vane is fixed and clamped by a pneumatic gripper 8, and the multi-axis motion platform 2 drives the coating spray gun 4 to move for spraying. The laser confocal probe 6102 is located beside the bottom nozzle of the coating spray gun 4, such as... Figure 5 As shown, the component maintains a certain lag distance from the coating spray gun 4 to avoid the spray mist area and moves synchronously with the coating spray gun 4. It performs non-contact real-time thickness detection on the newly coated, unaffected, and initially leveled coating. The PLC control system receives the measured coating thickness value output by the laser confocal probe 6102 in real time, compares the measured thickness value with the preset target thickness value to calculate the thickness deviation, and automatically adjusts the spray flow rate, spray pressure, and moving speed of the motion mechanism in real time based on the thickness deviation to control the coating thickness. Through real-time feedback and correction, the coating thickness is kept stable within the target range, achieving high-precision closed-loop coating. The detection component 61 uses non-contact detection, which does not damage the wet film or interfere with the coating process. It has high detection accuracy and good stability, and achieves real-time closed-loop control of the coating thickness, upgrading from open-loop control to intelligent closed-loop control. The thickness accuracy is significantly improved, and the thickness fluctuation is greatly reduced. Furthermore, real-time detection and correction during the coating process eliminate the need for offline sampling inspection, reducing rework and scrap, and improving production efficiency and product qualification rate.

[0029] Example 3: Figures 5-7 and Figure 12As shown, the coating machine body 1 is equipped with a deep cavity coating mechanism 5 and a detection mechanism 6. The detection mechanism 6 includes a detection component 61 and a moving component 62. The detection component 61 includes a laser confocal thickness gauge host 6101 and a laser confocal probe 6102. The laser confocal thickness gauge host 6101 is installed on the front surface of the moving plate 3 near the coating spray gun 4. The laser confocal probe 6102 is located on the side of the bottom end of the coating spray gun 4, maintaining a certain lag distance from the coating spray gun 4 to avoid the spray mist area, and moves synchronously with the coating spray gun 4. It is used to perform non-contact real-time thickness detection on the coating that has just been coated and initially leveled. The moving component 62 includes a second electric actuator 6201. A connecting block 6202 is fixedly installed at the bottom of the second electric actuator 6201. A U-shaped block 6203 is fixedly installed inside the connecting block 6202. A miniature electric actuator 6204 is fixedly installed inside the U-shaped block 6203. A support frame 6205 is fixedly installed at one end of the miniature electric actuator 6204. A miniature motor 6206 is fixedly installed inside the support frame 6205. A flipping block 6207 is fixedly installed at the output end of the miniature motor 6206. The outer surface of the laser confocal probe 6102 is fixedly installed inside the flipping block 6207. The laser confocal probe 6102 is tilted by the moving component 62 and moves in coordination with the movement to maintain a relative height with the bottom end of the L-shaped compensation nozzle 507 after quick connection, so as to detect the coating thickness of the inner wall of the guide tube in real time in a staggered position.

[0030] In this embodiment, during use, after the L-shaped compensating nozzle 507 is quickly attached to the bottom of the coating spray gun 4, the micro motor 6206 is activated, driving the flipping block 6207 to rotate, causing the laser confocal probe 6102 to rotate 90 degrees, from vertical to horizontal. Then, the micro electric actuator 6204 is activated, pulling the support frame 6205 towards the U-shaped block 6203, causing the flipping block 6207 and the laser confocal probe 6102 to move backward a short distance, thus misaligning the laser confocal probe 6102 with the nozzle of the coating spray gun 4. Next, the second electric actuator 6201 is activated, pushing the connecting block 6202 downward, thereby pushing the horizontally misaligned laser confocal probe 6102 downward. When the second electric actuator 6201 automatically closes, the laser confocal probe 6102 moves to a position matching the height of the bottom of the L-shaped compensating nozzle 507. At this time, the detection end of the laser confocal probe 6102 and the output end of the L-shaped compensating nozzle 507 maintain the same orientation. Figure 12 As shown, this facilitates precise detection of the coating thickness of the inner cavity wall by closely following the spraying trajectory during subsequent coating of the inner cavity wall of the guide vane. It also works in conjunction with the PLC control system to adjust the spraying flow rate, spraying pressure, and moving speed of the L-shaped compensating nozzle 507 in real time, realizing closed-loop control of the coating of the inner cavity wall. This effectively avoids defects such as thin coating, missed coating, and sagging caused by the narrow space and limited coating angle of the inner cavity wall, ensuring that the coating thickness of the inner cavity wall remains stable within the preset range, and comprehensively improving the coating accuracy of the product.

[0031] The method of use and working principle of this invention are as follows: the flow guide is fixed and clamped by the pneumatic gripper 8, the multi-axis motion platform 2 drives the coating spray gun 4 to move for spraying, the laser confocal probe 6102 maintains a certain lag distance with the coating spray gun 4, and performs non-contact real-time thickness detection on the coating that has just been coated, and the PLC control system automatically adjusts the spraying flow rate, spraying pressure and moving speed of the motion mechanism in real time according to the thickness deviation, so as to achieve high-precision closed-loop coating. The first electric actuator 501 is activated, pushing the fixed base 502, rotating frame 504 and L-shaped compensating nozzle 507 downward. Then, the forward and reverse motor 503 is activated, driving the rotating frame 504 to rotate towards the coating spray gun 4. The pneumatic gripper 505 drives the quick connector 506 and L-shaped compensating nozzle 507 to rotate directly below the coating spray gun 4. Then, the first electric actuator 501 pulls the fixed base 502 upward, so that the quick connector 506 is fitted upward onto the outer surface of the quick-connect ring 41. During the fitting process, multiple quick-connect posts 513 are forced to move into the annular groove 510 and pull the spring 515 to unfold. When the quick-connect post 513 moves to the quick-connect groove 42, the rebound of the spring 515 drives the quick-connect post 513 to insert into the quick-connect groove 42, quickly installing the L-shaped compensating nozzle 507 onto the bottom of the coating spray gun 4. Next, the pneumatic gripper 505 releases its grip on the quick connector 506, and the forward and reverse motors 503 drive the rotating frame 504 to move in the opposite direction, causing the opened pneumatic gripper 505 to rotate in the opposite direction and move away, extending the overall length of the coating spray gun 4 nozzle. The L-shaped compensating nozzle 507, with its corner structure, can smoothly extend into the depths of the inner cavity, eliminating blind spots in the inner cavity coating. The micro motor 6206 drives the flipping block 6207 to rotate, causing the laser confocal probe 6102 to rotate 90 degrees. Then, the micro electric push rod 6204 pulls the laser confocal probe 6102 a short distance, offsetting its position from the nozzle of the coating spray gun 4. Next, the second electric push rod 6201 pushes the connecting block 6202 and the laterally offset laser confocal probe 6102 downwards, facilitating subsequent accurate thickness detection of the coating on the inner wall of the guide vane.

[0032] Among them, the coating machine body 1, multi-axis motion platform 2, coating spray gun 4, first electric push rod 501, forward and reverse motor 503, pneumatic gripper 505, electromagnet 511, laser confocal thickness gauge host 6101, laser confocal probe 6102, second electric push rod 6201, miniature electric push rod 6204, miniature motor 6206, rotating platform 7, pneumatic gripper disc 8 and warning light 9 are all existing technologies, and their components and operating principles are all publicly available technologies, which will not be explained in detail here.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coating machine for desulfurization outboard pipe guide with controllable coating thickness, comprising a coating machine body (1), a multi-axis motion platform (2), and a coating spray gun (4), characterized in that: The coating machine body (1) is equipped with a deep cavity coating mechanism (5) and a detection mechanism (6). The deep cavity coating mechanism (5) includes a first electric push rod (501), a fixed base (502) is fixedly installed at the bottom end of the first electric push rod (501), a forward and reverse motor (503) is fixedly installed inside the fixed base (502), a rotating frame (504) is fixedly installed at the output end of the forward and reverse motor (503), a pneumatic gripper (505) is fixedly installed on the outer surface of the rotating frame (504), a quick connector (506) is provided inside the pneumatic gripper (505), an L-shaped compensation nozzle (507) is fixedly connected to the bottom of the quick connector (506), the L-shaped compensation nozzle (507) is quickly installed to the bottom end of the coating spray gun (4) through the quick connector (506), the length of the coating spray gun (4) nozzle is extended, and the L-shaped corner advantage of the L-shaped compensation nozzle (507) is used to penetrate deep into the inner cavity of the guide for comprehensive coating.

2. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 1, characterized in that: A quick-connect ring (41) is fixedly installed on the outer surface of the bottom end of the coating spray gun (4). Multiple quick-connect grooves (42) are opened on the outer surface of the quick-connect ring (41). A sealing gasket (518) is fixedly connected to one side inner wall of the quick connector (506). An annular groove (510) is opened inside the quick connector (506). An electromagnet (511) is fixedly installed on the inner wall of the annular groove (510). Multiple movable holes (512) are opened on the top surface of the inner wall of the quick connector (506). A quick-connect post (513) is movably embedded inside each of the multiple movable holes (512).

3. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 2, characterized in that: A metal block (514) is fixedly installed at one end of each of the multiple quick-connect pins (513). A spring (515) is movably sleeved on the outer surface of each of the multiple quick-connect pins (513). A conductive groove (508) is opened on the outer surface of the quick connector (506). A conductive sleeve (509) is fixedly installed inside the conductive groove (508). A conductive contact (519) is fixedly installed inside the pneumatic gripper (505). The outer surface of the conductive contact (519) is in contact with the inner wall of the conductive sleeve (509).

4. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 3, characterized in that: Two limiting blocks (516) are fixedly installed inside each of the multiple movable holes (512). Two limiting grooves (517) are opened on the outer surface of each of the multiple quick-connect pins (513). The outer surfaces of the multiple limiting blocks (516) are respectively movably embedded in the multiple limiting grooves (517). One end of each of the multiple springs (515) is fixedly connected to one side of the outer surface of each of the multiple metal blocks (514). The other end of each of the multiple springs (515) is fixedly installed on the other side of the inner wall of the annular groove (510).

5. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 4, characterized in that: The detection mechanism (6) includes a detection component (61) and a moving component (62). The detection component (61) includes a laser confocal thickness gauge host (6101) and a laser confocal probe (6102). The laser confocal thickness gauge host (6101) is installed on the front surface of the moving plate (3) near the coating spray gun (4). The laser confocal probe (6102) is located on the side of the bottom end of the coating spray gun (4), maintaining a certain lag distance with the coating spray gun (4) to avoid the spray mist area, and moves synchronously with the coating spray gun (4) to perform non-contact real-time thickness detection on the coating that has just been coated and initially leveled.

6. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 5, characterized in that: The moving component (62) includes a second electric actuator (6201), a connecting block (6202) is fixedly installed at the bottom end of the second electric actuator (6201), a U-shaped block (6203) is fixedly installed inside the connecting block (6202), a miniature electric actuator (6204) is fixedly installed inside the U-shaped block (6203), a support frame (6205) is fixedly installed at one end of the miniature electric actuator (6204), a miniature motor (6206) is fixedly installed inside the support frame (6205), and a flipping block (6207) is fixedly installed at the output end of the miniature motor (6206).

7. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 6, characterized in that: The outer surface of the laser confocal probe (6102) is fixedly installed inside the flipping block (6207). The laser confocal probe (6102) is rotated by the moving component (62) and moves in coordination with the movement to maintain a relative height with the bottom of the L-shaped compensation nozzle (507) after quick connection, so as to detect the coating thickness of the inner wall of the guide tube in real time in a staggered position.

8. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 7, characterized in that: The coating machine body (1) is equipped with a rotating platform (7) inside, and a pneumatic claw disk (8) is provided on the top of the rotating platform (7). A warning light (9) is provided on the top of the coating machine body (1). A motion plate (3) is provided on the outer surface of the multi-axis motion platform (2). The coating spray gun (4) is installed on the front surface of the motion plate (3). The outer surface of the second electric push rod (6201) is installed on the front surface of the motion plate (3) through an auxiliary block.

9. The desulfurization outboard pipe guide coating thickness controllable coating machine according to claim 8, characterized in that: Support blocks (6208) are fixedly installed on the top and bottom of the U-shaped block (6203). Two support rods (6209) are fixedly installed on the rear surface of the support frame (6205). One end of each of the two support rods (6209) extends through to the outer surface of the two support blocks (6208). An mounting plate (520) is fixedly installed on the outer surface of the first electric push rod (501). The mounting plate (520) is bolted to the outer surface of the multi-axis motion platform (2). The output end of the forward and reverse motor (503) extends through to the bottom of the fixed seat (502).

10. A method for using a coating machine with controllable coating thickness for a desulfurization outboard pipe guide, characterized in that, The coating thickness controllable coating machine for the desulfurization outboard pipe guide as described in claim 9 includes the following steps: S1. The precision metering pump stabilizes the paint flow rate, the pressure regulating valve adjusts the spraying pressure, the PLC control system controls the movement speed of the multi-axis motion platform (2), and then sprays the paint through the coating spray gun (4). The laser confocal probe (6102) moves synchronously with the coating spray gun (4) to perform non-contact real-time thickness detection on the coating that has just been coated. S2, the PLC control system receives the measured coating thickness value output by the laser confocal probe (6102) in real time, compares the measured thickness value with the preset target thickness value to calculate the thickness deviation, and automatically adjusts the spraying flow rate, spraying pressure and moving speed of the motion mechanism in real time according to the thickness deviation, so that the coating thickness is always stable within the target range, and high-precision closed-loop coating is achieved. S3. The first electric push rod (501) pushes the L-shaped compensation nozzle (507) downward, and the forward and reverse motor (503) drives the L-shaped compensation nozzle (507) to rotate to below the coating spray gun (4). Then the first electric push rod (501) pulls the rotating frame (504) upward, so that the quick connector (506) is fitted on the outer surface of the quick connector ring (41). S4. During this process, the quick-connect post (513) is forced to move into the annular groove (510), pushing the metal block (514) to pull the spring (515) to unfold. When the quick-connect post (513) moves to the quick-connect groove (42), the spring (515) drives the quick-connect post (513) to insert into the quick-connect groove (42), completing the quick connection between the L-shaped compensation nozzle (507) and the coating spray gun (4). Then the pneumatic gripper (505) is released, and the forward and reverse motors (503) drive the open pneumatic gripper (505) to rotate in the opposite direction and leave, without affecting the subsequent coating work. S5. Next, the micro motor (6206) drives the flip block (6207) to rotate, causing the laser confocal probe (6102) to rotate 90 degrees. The micro electric push rod (6204) pulls the support frame (6205) and the laser confocal probe (6102) to move backward a short distance together, so that the laser confocal probe (6102) is misaligned with the nozzle of the coating spray gun (4). S6. The second electric push rod (6201) pushes the horizontally offset laser confocal probe (6102) down to a position that matches the height of the bottom end of the L-shaped compensation nozzle (507), so that the laser confocal probe (6102) and the L-shaped compensation nozzle (507) maintain the same orientation, and follow the coating spray gun (4) to detect the thickness of the inner wall of the guide tube.

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