An automatic paint brushing device and method for the inner wall of a steel pipe

Abstract

The application provides a kind of steel pipe inner wall automatic paint brushing device, comprising: truss manipulator, two elevators, first support, drum conveyor and paint tank, the top of truss manipulator is provided with lifting beam, the bottom end of lifting beam is provided with support plate, the bottom of support plate is sequentially connected with a plurality of electromagnets from left to right, the surface of two elevators is respectively provided with third support, second support and two racks, the drum is arranged between two racks, the both ends of drum are connected with speed reducer, the inside of paint tank is provided with paint pump, the output end of paint pump is connected with hose, one end of hose is connected with paint inlet pipe, one end of paint inlet pipe is connected with paint brushing cylinder.The application provides a kind of steel pipe inner wall automatic paint brushing device, this device can be capable of simultaneously feeding, paint brushing and discharging for multiple short steel pipes at a time, greatly improve the paint brushing efficiency of short steel pipe, and paint brushing is uniform, save each batch steel pipe paint brushing quality is consistent, reduce the labor intensity of worker.

Description

Technical Field

[0001] This invention relates to the field of steel pipe processing, and in particular to an automatic painting device for the inner wall of steel pipes. Background Technology

[0002] Steel pipes refer to pipes made of steel.

[0003] Currently, in building construction, water and electrical lines are installed inside steel pipes before the pipes are laid in the ground. To prevent rust during the pre-installation of the steel pipes, the inner walls are painted. However, painting the inner walls of the steel pipes now requires multiple manual operations, which increases the workload and operation time.

[0004] Therefore, it is necessary to provide an automatic painting device for the inner wall of steel pipes to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides an automatic painting device for the inner wall of steel pipes, which solves the problem that painting the inner wall of steel pipes currently requires multiple manual operations, which increases the workload and operation time.

[0006] To solve the above-mentioned technical problems, the present invention provides an automatic painting device for the inner wall of steel pipes, comprising:

[0007] The system includes a truss manipulator, two elevators, a first support frame, a roller conveyor, and a paint tank. A lifting beam is mounted above the truss manipulator, and a support plate is mounted at the bottom of the lifting beam. Multiple electromagnets are connected sequentially from left to right to the bottom of the support plate. A third support frame, a second support frame, and two frames are mounted on the surfaces of the two elevators, respectively. A roller is positioned between the two frames, and a reduction motor is connected to both ends of the roller. Steel pipes are placed on the surface of the roller. Grooved wheels are mounted on both sides inside the first support frame, and a belt conveyor is positioned inside the first support frame and between the two grooved wheels.

[0008] The paint can is equipped with a paint pump inside. The output end of the paint pump is connected to a hose. One end of the hose is connected to a paint inlet pipe, and one end of the paint inlet pipe is connected to a paint brush.

[0009] Preferably, the surface and bottom of the elevator are respectively equipped with limit switches and laser rangefinders.

[0010] Preferably, a loading trolley and a unloading trolley are respectively provided below the elevator and on the left and right sides of the third support.

[0011] Preferably, a loading track is provided below the loading trolley, and a unloading track is provided below the unloading trolley.

[0012] Preferably, a cylinder is installed on one side of the frame, and a tension sensor is installed at one end of the cylinder.

[0013] Preferably, one end of the second bracket is provided with a guide wheel.

[0014] Preferably, the paint spraying tube includes a paint distribution tube, a core tube is provided on the surface of the paint distribution tube, a plug is provided at the end of the paint distribution tube, a sponge brush tube is provided on the surface of the paint distribution tube, and a flange is provided at one end of the paint distribution tube and on both sides of the plug.

[0015] Preferably, a baffle is provided on one side of the surface of the unloading trolley, and multiple moving components are provided on the surface of the unloading trolley. Each moving component includes a moving groove, a moving block is slidably connected inside the moving groove, a moving plate is connected to the surface of the moving block, a fixing bolt is provided inside the moving block, and multiple fixing holes adapted to the fixing bolt are opened at the bottom of the inner wall of the moving groove. A flipping component is provided on one side of the unloading trolley, and the flipping component includes a groove, a rotating seat is provided inside the groove, a flipping plate is connected to one side of the rotating seat, a circular limiting block is connected to one end of the rotating seat through a circular block, a limiting bolt is provided inside the circular limiting block, multiple through holes adapted to the limiting bolt are opened on the surface of the circular limiting block, and a limiting hole adapted to the limiting bolt is opened on the side of the unloading trolley.

[0016] Preferably, a splicing assembly is provided on one side of the unloading trolley. The splicing assembly includes a base plate, one end of which is connected to a splicing block. A splicing groove adapted to the splicing block is opened on the side of the unloading trolley, and a rectangular plate is connected to one side of the surface of the base plate.

[0017] A method for an automatic painting device for the inner wall of a steel pipe includes the following steps:

[0018] S1. The loading trolley transports multiple sections of steel pipe to be painted into the truss robot. The controller controls the truss robot to drive multiple electromagnets to simultaneously grab the multiple sections of steel pipe to be painted onto two rollers, completing the loading of the steel pipe.

[0019] S2. The cylinder pulls the second bracket to retract, clamping multiple steel pipe sections between the guide rollers on the second bracket and the guide rollers on the third bracket. At the same time, the tension sensor detects the clamping torque of the steel pipe. After the torque reaches the preset value, the cylinder stops retracting and maintains pressure to complete the elimination of gaps in the steel pipe.

[0020] S3. The elevator drives the steel pipe down 10 centimeters, so that the paint tube is higher than the inner wall of the steel pipe. Then the belt conveyor drives the paint tube into the first section of the steel pipe. Then the elevator drives the steel pipe up 10 centimeters, so that the inner wall of the steel pipe contacts the paint tube. Then the paint pump is started. The paint pump draws paint from the paint tank and flows out of the paint tube. At the same time, the reduction motor drives the roller to rotate. The two rollers rotating in the same direction drive the steel pipe to rotate. Then the belt conveyor drives the paint tube to move. When the paint tube moves from the first section of the steel pipe to the last section of the steel pipe, the paint pump stops and the belt conveyor moves the paint tube out of the last section of the steel pipe, completing the painting of the inner wall of the steel pipe.

[0021] S4. After the steel pipe rotates continuously for five minutes, the rotating paint evenly covers the inner wall of the steel pipe, ensuring that the paint thickness on the inner wall of the steel pipe is consistent. Then, the reduction motor stops, the cylinder drives the guide wheel to release the multiple sections of steel pipe, and the truss robot arm drives multiple electromagnets to grab the painted sections of steel pipe onto the unloading trolley, completing the unloading of the steel pipe.

[0022] S5. Following the steps above, paint the next batch of steel pipes.

[0023] Compared with related technologies, the automatic painting device for the inner wall of steel pipes provided by the present invention has the following beneficial effects:

[0024] This invention provides an automatic painting device for the inner wall of steel pipes. This device can simultaneously feed, paint, and unload multiple short steel pipes, greatly improving the painting efficiency of short steel pipes, and ensuring uniform paint thickness, maintaining consistent painting quality across batches of steel pipes, and reducing the labor intensity of workers. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of a first embodiment of an automatic painting device for the inner wall of a steel pipe provided by the present invention;

[0026] Figure 2 This is a top view of the structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the left-side structure of the present invention;

[0028] Figure 4 This is a front view schematic diagram of the gap-eliminating mechanism of the present invention;

[0029] Figure 5 This is a top view schematic diagram of the backlash elimination mechanism of the present invention from a first perspective;

[0030] Figure 6 This is a top view schematic diagram of the backlash elimination mechanism of the present invention from a second perspective;

[0031] Figure 7 This is a front view structural diagram of the belt conveyor according to the present invention;

[0032] Figure 8 This is a top view schematic diagram of the belt conveyor structure of the present invention;

[0033] Figure 9 This is a cross-sectional structural diagram of the paint brush holder according to the present invention;

[0034] Figure 10 This is a top view of the structure of the roller in this invention;

[0035] Figure 11 This is a schematic diagram showing the connection relationship between the various electrical components of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of a second embodiment of an automatic painting device for the inner wall of a steel pipe provided by the present invention;

[0037] Figure 13 for Figure 12 The enlarged schematic diagram of part A shown below;

[0038] Figure 14 This is a schematic diagram of the third embodiment of an automatic painting device for the inner wall of a steel pipe provided by the present invention;

[0039] Figure 15 for Figure 14 The enlarged schematic diagram of part B is shown.

[0040] The diagram is labeled as follows: 1. Truss robot, 2. Guide wheel, 3. Third support, 4. First support, 5. Grooved wheel, 6. Paint inlet pipe, 7. Roller conveyor, 8. Hose, 9. Paint can, 10. Paint pump, 11. Belt conveyor, 12. Paint canister, 13. Lifting platform, 14. Steel pipe, 15. Roller, 16. Frame, 17. Laser rangefinder sensor, 18. Limit switch, 19. Second support, 20. Gear motor, 21. Electromagnet, 22. Support plate, 23. Lifting beam, 24. Cylinder, 25. Loading trolley, 26. Loading track, 27. Unloading track, 28. Tension sensor, 29. Rotary joint, 30. Paint distribution pipe, 31. Sponge brush holder, 32. Core tube, 33. Plug, 34. Flange, 35. Unloading trolley.

[0041] 36. Baffle

[0042] 37. Moving component; 371. Moving slot; 372. Moving block; 373. Moving plate; 374. Fixing bolt; 375. Fixing hole.

[0043] 38. Flip assembly; 381. Groove; 382. Rotating seat; 383. Flip plate; 384. Circular limit block; 385. Limit bolt; 386. Through hole.

[0044] 39. Splicing component; 391. Base plate; 392. Splicing block; 393. Splicing groove; 394. Rectangular plate. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0046] First Embodiment

[0047] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of an automatic painting device for the inner wall of a steel pipe provided by the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the left-side structure of the present invention; Figure 4 This is a front view schematic diagram of the gap-eliminating mechanism of the present invention; Figure 5 This is a top view schematic diagram of the backlash elimination mechanism of the present invention from a first perspective; Figure 6 This is a top view schematic diagram of the backlash elimination mechanism of the present invention from a second perspective; Figure 7 This is a front view structural diagram of the belt conveyor according to the present invention;

[0048] Figure 8 This is a top view schematic diagram of the belt conveyor structure of the present invention; Figure 9 This is a cross-sectional structural diagram of the paint brush holder according to the present invention; Figure 10 This is a top view of the structure of the roller in this invention; Figure 11 This is a schematic diagram showing the connection relationships between the various electrical components of the present invention. An automatic painting device for the inner wall of a steel pipe includes:

[0049] The system includes a truss manipulator 1, two elevators 13, a first support 4, a roller conveyor 7, and a paint tank 9. A lifting beam 23 is mounted above the truss manipulator 1, and a support plate 22 is mounted at the bottom of the lifting beam 23. Multiple electromagnets 21 are connected sequentially from left to right to the bottom of the support plate 22. A third support 3, a second support 19, and two frames 16 are respectively mounted on the surfaces of the two elevators 13. A roller 15 is positioned between the two frames 16, and a reduction motor 20 is connected to both ends of the roller 15. A steel pipe 14 is placed on the surface of the roller 15. Grooved wheels 5 are mounted on both sides inside the first support 4, and a belt conveyor 11 is positioned inside the first support 4 and between the two grooved wheels 5.

[0050] The paint tank 9 is equipped with a paint pump 10. The output end of the paint pump 10 is connected to a hose 8. One end of the hose 8 is connected to a paint inlet pipe 6. One end of the paint inlet pipe 6 is connected to a paint brush tube 12.

[0051] The grooved wheel 5 limits and guides the paint inlet pipe 6. Multiple grooves are provided on the belt surface of the belt conveyor 11. The surface of the paint inlet pipe 6 is tightly attached to the belt surface of the belt conveyor 11. The grooves on the belt surface provide a certain anti-slip effect. In use, multiple steel pipe sections are stacked sequentially on two rollers 15, and then the belt conveyor 11 drives the paint brush 12 to feed the first section of the steel pipe. Figure 1 Inside the leftmost steel pipe, the reduction motor 20 drives the steel pipe to rotate, while the paint pump 10 sends the paint from the paint tank 9 into the paint brush tube 12 to overflow. The rotating steel pipe comes into contact with the paint brush tube 12 and is painted. Then the belt conveyor 11 drives the paint brush tube 12 to move towards the tail end of the steel pipe. When the paint brush tube 12 moves out of the tail end of the steel pipe, the painting process of multiple sections of steel pipe is completed. Compared with manual painting, it improves painting efficiency and painting quality.

[0052] Limit switches 18 and laser rangefinders 17 are respectively installed on the surface and bottom of the elevator 13.

[0053] Below the elevator 13 and on the left and right sides of the third support 3, there are loading carts 25 and unloading carts 35 respectively.

[0054] A loading track 26 is provided below the loading trolley 25, and a unloading track 27 is provided below the unloading trolley 35.

[0055] Multiple V-shaped suction cup electromagnets 21 are arranged at equal intervals on the support plate 22. The lifting machine 13 is a scissor lift 13. Each V-shaped suction cup electromagnet 21 corresponds to a section of steel pipe on the loading cart 25. Since the suction surface of the V-shaped suction cup electromagnet 21 has a V-shaped groove, it can adapt to steel pipes of different outer diameters and also has an automatic guiding effect. The loading cart 25 is used to send the stacked steel pipes into the gantry robot 1. The gantry robot 1 drives multiple V-shaped suction cup electromagnets 21 to move in space. Through the gantry robot 1, the loading cart 25 and the unloading cart 35, the automatic loading and unloading of steel pipes can be realized. To further reduce the labor intensity of workers and improve painting efficiency, the function of the lifting platform 13 is as follows: Since the paint brush 12 is flexible, if it is necessary for the paint brush 12 to fully contact the inner wall of the steel pipe, the paint brush 12 needs to be lower than the inner wall of the steel pipe. When the paint brush 12 is directly sent into the steel pipe, it will hit the opening of the steel pipe. After repeated impacts, the paint brush 12 will be worn and damaged. Therefore, the lifting platform 13 is set up. When it is necessary to send the paint brush 12 into the steel pipe, the lifting platform 13 descends so that the opening of the steel pipe is lower than the paint brush 12. During painting, the lifting platform 13 drives the steel pipe upward so that the paint brush 12 can fully contact the inner wall of the steel pipe.

[0056] A cylinder 24 is mounted on one side of the frame 16, and a tension sensor 28 is mounted on one end of the cylinder 24.

[0057] The second bracket 19 is provided with a guide wheel 2 at one end.

[0058] The paint tube 12 includes a paint distribution tube 30, a core tube 32 is provided on the surface of the paint distribution tube 30, a plug 33 is provided at the end of the paint distribution tube 30, a sponge brush tube 31 is provided on the surface of the paint distribution tube 30, and a flange 34 is provided at one end of the paint distribution tube 30 and on both sides of the plug 33.

[0059] like Figure 4 , Figure 5 and Figure 6 As shown, there are gaps between the multiple steel pipes placed on the roller 15 by the truss robot 1. During the painting process of the paint sprayer 12, the anti-rust paint will flow out from the gaps between the steel pipes. On the one hand, the anti-rust paint will stain the roller 15 and the outer wall of the steel pipe, affecting the subsequent anti-corrosion construction of the outer wall of the steel pipe. On the other hand, it will cause waste of anti-rust paint. Therefore, a gap elimination mechanism is set up. Its working process is as follows: After the truss robot 1 grabs the steel pipe and places it on the roller 15, the piston rod of the cylinder 24 retracts, thereby pulling the guide wheel 2 on the second support 19 and the third support 3 to clamp the steel pipe and eliminate the gaps between the steel pipes. Then the cylinder 24 maintains pressure, so that the multiple steel pipes are driven to rotate by the roller 15 in the clamped state. In addition, since the guide wheel 2 and the steel pipe are rolling friction, the rolling of the steel pipe is not affected by the clamping of the cylinder 24.

[0060] A limit switch 18, triggered by the second bracket 19, is installed at one end of the guide rail. A laser rangefinder 17 for detecting the height of the elevator 13 is installed on the elevator 13. The piston rod of the cylinder 24 is connected to the second bracket 19 through a tension sensor. The limit switch 18, the laser rangefinder 17, and the tension sensor transmit the detected signals to the controller. The controller controls the lifting and lowering of the elevator 13, the extension and retraction of the cylinder 24, the forward and reverse rotation of the belt conveyor 11, the start and stop of the paint pump 10, and the start and stop of the geared motor 20. The controller is a PLC controller, which enables automatic painting of the inner wall of the steel pipe, further reducing the labor intensity of workers. In addition, to ensure the accurate positioning of the paint tube 12 in and out of the steel pipe, the motor in the belt conveyor 11 is a servo motor. The controller inputs a specified number of pulses to the servo motor to control the number of rotations of the belt, thereby controlling the length of the paint inlet pipe 6 being conveyed, thus achieving position control of the paint tube 12.

[0061] like Figure 9 As shown, the paint spraying tube 12 includes a core tube 32, with a flange 34 at each end. One end of the paint spreading tube 30 is sealed by a plug 33 and inserted into the flange 34, creating a gap between the core tube 32 and the paint spreading tube 30. The other end of the paint spreading tube 30 is connected to one end of the paint inlet tube 6 via a rotary joint 29. A sponge brush tube 31 is wrapped around the core tube 32. Multiple through holes are provided on both the core tube 32 and the paint spreading tube 30. The paint in the paint inlet tube 6 enters the paint spreading tube 30 after passing through the rotary joint 29, and then passes through the through holes in the paint spreading tube 30 and distributes into the gap. The paint in the gap permeates the sponge brush tube 31 after passing through the through holes in the core tube 32, so that the surface of the sponge brush tube 31 is evenly covered with paint. At the same time, the sponge brush tube 31 can rotate under the drive of the steel pipe, so that the surface of the steel pipe is evenly covered with paint.

[0062] like Figure 1 As shown, it also includes a roller conveyor 7, with one end of the paint inlet pipe 6 placed on the roller conveyor 15. The roller conveyor 7 is used to support the paint inlet pipe 6 and the hose 8.

[0063] A method for an automatic painting device for the inner wall of a steel pipe includes the following steps:

[0064] S1. The loading trolley 25 transports the multiple sections of steel pipe to be painted into the truss robot 1. The controller controls the truss robot 1 to drive multiple electromagnets 21 to simultaneously grab the multiple sections of steel pipe to be painted onto two rollers 15, thus completing the loading of the steel pipe.

[0065] S2, cylinder 24 pulls the second bracket 19 to retract, so that multiple steel pipes are clamped between the guide wheel 2 on the second bracket 19 and the guide wheel 2 on the third bracket 3. At the same time, the tension sensor detects the clamping torque of the steel pipe. After the torque reaches the preset value, cylinder 24 stops retracting and maintains pressure to complete the elimination of gaps in the steel pipe.

[0066] S3. The elevator 13 drives the steel pipe down 10 centimeters, so that the paint tube 12 is higher than the inner wall of the steel pipe. Then the belt conveyor 11 drives the paint tube 12 into the first section of the steel pipe. Then the elevator 13 drives the steel pipe up 10 centimeters, so that the inner wall of the steel pipe contacts the paint tube 12. Then the paint pump 10 is started. The paint pump 10 draws paint from the paint tank 9 and flows out of the paint tube 12. At the same time, the reduction motor 20 drives the roller 15 to rotate. The two rollers 15 rotating in the same direction drive the steel pipe to rotate. Then the belt conveyor 11 drives the paint tube 12 to move. When the paint tube 12 moves from the first section of the steel pipe to the last section of the steel pipe, the paint pump 10 stops. The belt conveyor 11 moves the paint tube 12 out of the last section of the steel pipe, completing the painting of the inner wall of the steel pipe.

[0067] S4. After the steel pipe rotates continuously for five minutes, the rotating paint evenly covers the inner wall of the steel pipe, ensuring that the paint thickness on the inner wall of the steel pipe is consistent. Then, the reduction motor 20 stops, the cylinder 24 drives the guide wheel 2 to release the multiple sections of steel pipe, and the truss robot 1 drives multiple electromagnets 21 to grab the painted sections of steel pipe onto the unloading trolley 35, completing the unloading of the steel pipe.

[0068] S5. Following the steps above, paint the next batch of steel pipes.

[0069] Compared with related technologies, the automatic painting device for the inner wall of steel pipes provided by the present invention has the following beneficial effects:

[0070] This invention provides an automatic painting device for the inner wall of steel pipes. This device can simultaneously feed, paint, and unload multiple short steel pipes, greatly improving the painting efficiency of short steel pipes, and ensuring uniform paint thickness, maintaining consistent painting quality across batches of steel pipes, and reducing the labor intensity of workers.

[0071] Second Embodiment

[0072] Please refer to the following: Figure 12 and Figure 13 Based on the automatic painting device for the inner wall of steel pipes provided in the first embodiment of this application, the second embodiment of this application proposes another automatic painting device for the inner wall of steel pipes. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0073] Specifically, the second embodiment of this application provides an automatic painting device for the inner wall of steel pipes, which differs in that, in this automatic painting device for the inner wall of steel pipes, a baffle 36 is provided on one side of the surface of the unloading trolley 35, and a plurality of moving components 37 are provided on the surface of the unloading trolley 35. Each moving component 37 includes a moving groove 371, a moving block 372 is slidably connected inside the moving groove 371, a moving plate 373 is connected to the surface of the moving block 372, a fixing bolt 374 is provided inside the moving block 372, and a plurality of bolts 374 are provided at the bottom of the inner wall of the moving groove 371. The material unloading trolley 35 has a fixed hole 375. A flipping component 38 is provided on one side of the material unloading trolley 35. The flipping component 38 includes a groove 381. A rotating seat 382 is provided inside the groove 381. A flipping plate 383 is connected to one side of the rotating seat 382. A circular limiting block 384 is connected to one end of the rotating seat 382 through a circular block. A limiting bolt 385 is provided inside the circular limiting block 384. A plurality of through holes 386 adapted to the limiting bolt 385 are opened on the surface of the circular limiting block 384. A limiting hole adapted to the limiting bolt 385 is opened on the side of the material unloading trolley 35.

[0074] The working principle of the automatic painting device for the inner wall of steel pipe provided by this invention is as follows:

[0075] In use, when feeding steel pipes 14 sequentially, first remove the limiting bolt 385 connecting the circular limiting block 384 and the feeding cart 35. After the limiting bolt 385 is removed, pull the flip plate 383 to rotate to one side under the action of the rotating seat 382. After the flip plate 383 is opened, remove the moving block 372 and the fixing bolt 375 inside the feeding cart 35. After the fixing bolt 375 is removed, pull the moving plate 373 to move to one side under the action of the moving block 372 and the moving groove 371 to perform the feeding operation. After placing the steel pipe 14 on one side of the feeding cart 35, return the moving plate 373 to its original position and return the flip plate 383 to its original position. Finally, feed the steel pipe 14 between the moving plate 373 and the flip plate 383.

[0076] Compared with related technologies, the automatic painting device for the inner wall of steel pipes provided by the present invention has the following beneficial effects:

[0077] The present invention provides an automatic painting device for the inner wall of steel pipes. A baffle 36, multiple moving components 36 and a flipping component 38 are arranged on the surface of the unloading cart 35 and used in conjunction to uniformly unload and stack the steel pipes after the paint is applied to the inner wall of the steel pipe 14.

[0078] Third Embodiment

[0079] Please refer to the following: Figure 14 and Figure 15 Based on the automatic painting device for the inner wall of steel pipes provided in the first embodiment of this application, the third embodiment of this application proposes another automatic painting device for the inner wall of steel pipes. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0080] Specifically, the third embodiment of this application provides an automatic painting device for the inner wall of a steel pipe, which differs in that the automatic painting device for the inner wall of a steel pipe has a splicing component 39 on one side of the unloading cart 35. The splicing component 39 includes a base plate 391, one end of the base plate 391 is connected to a splicing block 392, the side of the unloading cart 35 is provided with a splicing groove 393 that is adapted to the splicing block 392, and a rectangular plate 394 is connected to one side of the surface of the base plate 391.

[0081] The splicing block 392 and the splicing groove 393 are T-shaped. The splicing block 392 and the splicing groove 393 are used together to facilitate the connection of the base plate 391 and the unloading trolley 35.

[0082] The working principle of the automatic painting device for the inner wall of steel pipe provided by this invention is as follows:

[0083] When in use, when increasing the width of the unloading trolley 35 and the number of steel pipes 14 placed, the base plate 391 with multiple splicing blocks 392 and rectangular plates 394 can be connected to the splicing groove 393 opened on the side of the unloading trolley 35 for use.

[0084] Compared with related technologies, the automatic painting device for the inner wall of steel pipes provided by the present invention has the following beneficial effects:

[0085] The present invention provides an automatic painting device for the inner wall of steel pipes. The splicing component 29 is set on the side of the unloading trolley 35 to increase the number of steel pipes 14 that the unloading trolley 35 can hold.

[0086] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automatic painting device for the inner wall of a steel pipe, characterized in that, include: The system includes a truss manipulator, two elevators, a first support frame, a roller conveyor, and a paint tank. A lifting beam is mounted above the truss manipulator, and a support plate is mounted at the bottom of the lifting beam. Multiple electromagnets are connected sequentially from left to right to the bottom of the support plate. A third support frame, a second support frame, and two frames are mounted on the surfaces of the two elevators, respectively. A roller is positioned between the two frames, and a reduction motor is connected to both ends of the roller. Steel pipes are placed on the surface of the roller. Grooved wheels are mounted on both sides inside the first support frame, and a belt conveyor is positioned inside the first support frame and between the two grooved wheels. The paint can is equipped with a paint pump inside. The output end of the paint pump is connected to a hose. One end of the hose is connected to a paint inlet pipe, and one end of the paint inlet pipe is connected to a paint brush tube. A cylinder is installed on one side of the frame, and a tension sensor is installed at one end of the cylinder; The second bracket is equipped with a guide wheel at one end; The piston rod of the cylinder is connected to the second bracket via a tension sensor; The cylinder pulls the second bracket back, clamping multiple steel pipe sections between the guide wheels on the second and third brackets. At the same time, the tension sensor detects the clamping torque of the steel pipes. Once the torque reaches the preset value, the cylinder stops retracting and maintains pressure to complete the elimination of gaps in the steel pipes.

2. The automatic painting device for the inner wall of steel pipes according to claim 1, characterized in that, Limit switches and laser rangefinders are respectively installed on the surface and bottom of the elevator.

3. The automatic painting device for the inner wall of steel pipes according to claim 1, characterized in that, Below the elevator and on the left and right sides of the third support, there are loading carts and unloading carts respectively.

4. The automatic painting device for the inner wall of steel pipes according to claim 3, characterized in that, The loading trolley is provided with a loading track below it, and the unloading trolley is provided with a unloading track below it.

5. The automatic painting device for the inner wall of steel pipes according to claim 1, characterized in that, The paint spraying tube includes a paint distribution tube, a core tube is provided on the surface of the paint distribution tube, a plug is provided at the end of the paint distribution tube, a sponge brush tube is provided on the surface of the paint distribution tube, and a flange is provided at one end of the paint distribution tube and on both sides of the plug.

6. The automatic painting device for the inner wall of steel pipes according to claim 4, characterized in that, A baffle is provided on one side of the surface of the unloading trolley. Multiple moving components are provided on the surface of the unloading trolley. Each moving component includes a moving groove, a moving block slidably connected inside the moving groove, a moving plate connected to the surface of the moving block, and a fixing bolt inside the moving block. Multiple fixing holes adapted to the fixing bolt are opened at the bottom of the inner wall of the moving groove. A tilting component is provided on one side of the unloading trolley. The tilting component includes a groove, a rotating seat inside the groove, and a tilting plate connected to one side of the rotating seat. A circular limiting block is connected to one end of the rotating seat via a circular block. A limiting bolt is provided inside the circular limiting block, and multiple through holes adapted to the limiting bolt are opened on the surface of the circular limiting block. A limiting hole adapted to the limiting bolt is opened on the side of the unloading trolley.

7. The automatic painting device for the inner wall of steel pipes according to claim 3, characterized in that, A splicing assembly is provided on one side of the unloading trolley. The splicing assembly includes a base plate, one end of which is connected to a splicing block. A splicing groove adapted to the splicing block is opened on the side of the unloading trolley, and a rectangular plate is connected to one side of the surface of the base plate.

8. A method of using an automatic painting device for the inner wall of a steel pipe, characterized in that, Includes the following steps: S1. The loading trolley transports multiple sections of steel pipe to be painted into the truss robot. The controller controls the truss robot to drive multiple electromagnets to simultaneously grab the multiple sections of steel pipe to be painted onto two rollers, completing the loading of the steel pipe. S2. The cylinder pulls the second bracket to retract, clamping multiple steel pipe sections between the guide rollers on the second bracket and the guide rollers on the third bracket. At the same time, the tension sensor detects the clamping torque of the steel pipe. After the torque reaches the preset value, the cylinder stops retracting and maintains pressure to complete the elimination of gaps in the steel pipe. S3. The elevator drives the steel pipe down 10 centimeters, so that the paint tube is higher than the inner wall of the steel pipe. Then the belt conveyor drives the paint tube into the first section of the steel pipe. Then the elevator drives the steel pipe up 10 centimeters, so that the inner wall of the steel pipe contacts the paint tube. Then the paint pump is started. The paint pump draws paint from the paint tank and flows out of the paint tube. At the same time, the reduction motor drives the roller to rotate. The two rollers rotating in the same direction drive the steel pipe to rotate. Then the belt conveyor drives the paint tube to move. When the paint tube moves from the first section of the steel pipe to the last section of the steel pipe, the paint pump stops and the belt conveyor moves the paint tube out of the last section of the steel pipe, completing the painting of the inner wall of the steel pipe. S4. After the steel pipe rotates continuously for five minutes, the rotating paint evenly covers the inner wall of the steel pipe to ensure that the paint thickness on the inner wall of the steel pipe is consistent. Then the reduction motor stops, the cylinder drives the guide wheel to release the multiple sections of steel pipe, and the truss robot arm drives multiple electromagnets to grab the painted sections of steel pipe onto the unloading trolley to complete the unloading of the steel pipe. S5. Following the steps above, paint the next batch of steel pipes.

Images