Uniform spraying device for outer surface of polyurethane thermal insulation pipeline

Abstract

The invention relates to the technical field of heat preservation pipeline machining, in particular to a uniform spraying device for the outer surface of a polyurethane heat preservation pipeline. The problems of uneven polishing, uneven paint spraying, low efficiency, high cost, potential safety hazards and the like existing in traditional manual treatment of the welding portion of the polyurethane heat preservation pipeline are solved. According to the device, the driving mechanism drives the supporting ring to rotate, so that the grinding mechanism and the paint spraying mechanism annularly move, and uniform treatment on a welding part is achieved; the polishing mechanism adopts a double polishing mode, and rough polishing and fine polishing are sequentially carried out; the paint spraying mechanism is matched with the paint storage assembly to realize stable conveying and uniform spraying of paint; the supporting mechanism ensures the stability of the pipeline; according to the device, the working efficiency and quality are improved, and the labor intensity, the production cost and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation pipe processing technology, and in particular to a uniform spraying device for the outer surface of polyurethane thermal insulation pipes. Background Technology

[0002] Welding between pipes is a common operation during the installation and maintenance of polyurethane insulated pipes. After welding, the quality of the weld and subsequent treatment are crucial. On one hand, the weld surface often has unevenness, burrs, and oxide layers. If not cleaned, this not only affects the pipe's appearance but can also become a starting point for corrosion, reducing the pipe's service life. On the other hand, the welded area needs timely protective treatment after cleaning to prevent rust and other problems. Currently, spray painting is commonly used to form a protective coating.

[0003] Traditional methods for treating welded sections of polyurethane insulated pipes have several drawbacks. In the grinding stage, manual hand-held grinding tools are often used. This method is not only labor-intensive and inefficient, but also makes it difficult to ensure uniform grinding quality, easily resulting in over- or under-grinding. Furthermore, due to the instability of manual operation, it is difficult to perform comprehensive and meticulous grinding of the welded section, especially for larger diameter pipes, where manual grinding often fails to achieve the desired results.

[0004] The painting process also presents several challenges. Manual painting makes it difficult to ensure uniform paint application, often resulting in inconsistent coating thickness and affecting the quality of the protective coating. Furthermore, manual painting leads to significant paint waste, increasing production costs. In addition, manual operation poses certain safety hazards, such as the potential harm to workers' health from hazardous substances in the paint.

[0005] With the continuous expansion of pipeline engineering scale and the increasing demands for pipeline quality, traditional methods for treating the welded parts of polyurethane insulated pipelines can no longer meet practical needs. Therefore, this technical solution proposes a uniform spraying device for the outer surface of polyurethane insulated pipelines. Summary of the Invention

[0006] This invention provides a uniform spraying device for the outer surface of polyurethane insulated pipes, which solves the problems of uneven grinding, uneven painting, low efficiency, high cost and safety hazards that exist in the traditional manual treatment of the welded parts of polyurethane insulated pipes.

[0007] This invention provides the following technical solution: A uniform spraying device for the outer surface of a polyurethane insulated pipe includes a construction frame, a support ring rotatably connected inside the construction frame, a drive mechanism mounted on the construction frame, one side of the drive mechanism extending into the construction frame and connected to the support ring, and the uniform spraying device further includes: A grinding mechanism is installed inside the support ring to perform double grinding on the welded part formed after the two insulated pipe bodies are welded together; The painting mechanism is installed inside the support ring, with one side of the painting mechanism extending to the outside of the construction frame. The painting mechanism is used to paint the ground parts after the welded parts are ground, thereby forming a protective coating. The support mechanisms installed on both sides of the construction frame are used to clamp and position the insulated pipe bodies that need to be welded, so that the two insulated pipe bodies can be kept in a stable position without changing when the welded parts are ground and painted.

[0008] In one possible design, the drive mechanism includes a gear ring fixedly sleeved on a support ring, a drive motor fixedly mounted on one side of the construction frame, the output shaft of the drive motor extending into the construction frame and fixedly mounted with a drive gear, the drive gear meshing with the gear ring.

[0009] In one possible design, the grinding mechanism includes a mounting box fixedly installed within a support ring. A movable box is slidably connected within the mounting box. Two sliding guide rods are fixedly installed at the top and bottom of the movable box. Support plates are fixedly installed on the top and bottom inner walls of the mounting box. The two sliding guide rods at the same height pass through the corresponding support plates and are slidably connected to the support plates to achieve sliding limit of the movable box. An electric push rod located inside the movable box is fixedly installed on one inner wall of the mounting box. The output shaft of the electric push rod is fixedly connected to one inner wall of the movable box. A mounting frame is fixedly installed on the side of the electric push rod located outside the mounting box. A servo motor is fixedly installed on one side of the mounting frame. The output shaft of the servo motor extends into the mounting frame and is fixedly installed with a grinding wheel. The grinding wheel is used for preliminary grinding of the welded part.

[0010] In one possible design, the polishing mechanism further includes a sandpaper strip fitted over the welded joints of the two insulated pipe bodies. A perforation is provided on the top inner wall of the mounting box, through which the sandpaper strip passes and through the support plate located above. A first clamping assembly is provided at the bottom of one side of the mounting box for positioning and clamping the bottom of the sandpaper strip. A second clamping assembly is provided at the top of one side of the movable box for clamping and positioning the top of the sandpaper strip.

[0011] In one possible design, the first clamping assembly includes a tray fixedly installed on the bottom of one side of the mounting box. A rotating pressure plate is rotatably connected to the top of the tray. The bottom of the sandpaper belt is located between the tray and the rotating pressure plate. The rotating pressure plate is used to clamp and position the bottom of the sandpaper belt. Two positioning plates are symmetrically fixedly installed on the top of the tray. A first insert rod is slidably connected through the positioning plates. Two first mating plates are symmetrically fixedly installed on the top of the rotating pressure plate. The first insert rod passes through the corresponding first mating plate and is inserted and snapped into the first mating plate. A first tension spring is sleeved on the first insert rod. The two ends of the first tension spring are respectively fixedly connected to one side of the positioning plate and one end of the first insert rod through hooks set at both ends of the first tension spring.

[0012] In one possible design, the second clamping assembly includes two positioning screws symmetrically fixedly mounted on the top of one side of the movable box. The same movable pressure plate is sleeved on the two positioning screws. The movable pressure plate is used to press the top of the sandpaper belt. Two positioning nuts are symmetrically rotatably connected on one side of the movable pressure plate. The two positioning nuts are respectively sleeved on the corresponding positioning screws and threadedly connected to the positioning screws.

[0013] In one possible design, the painting mechanism includes an annular conveyor box fixedly installed inside the construction frame. A sealing ring is rotatably connected to the inner opening of the annular conveyor box. A booster pump is fixedly installed on the bottom inner wall of the support ring. A first conveying pipe is fixedly installed on the output end of the booster pump. A conical nozzle is fixedly installed on the suction end of the booster pump. One end of the conical nozzle passes through the sealing ring and is tightly fixedly connected to the sealing ring. A connecting pipe is fixedly installed through one side of the inner wall of the annular conveyor box. The mechanism also includes a paint storage assembly disposed on one side of the construction frame.

[0014] In one possible design, the paint storage assembly includes an equipment rack located on one side of the construction frame. A delivery pump and a paint tank are fixedly mounted on the equipment rack. A bend is fixedly mounted on the suction end of the delivery pump, and the top end of the bend extends into the outlet of the paint tank and is fixedly connected to the inner wall of the outlet. A second delivery pipe is fixedly mounted on the output end of the delivery pump, and one end of the second delivery pipe is engaged with one end of a connecting pipe. A stepper motor is fixedly mounted on the top of the paint tank, and the output shaft of the stepper motor extends into the paint tank and is fixedly mounted on a support shaft. A stirring rack is fixedly sleeved on the support shaft. An injection pipe is fixedly mounted through the inner wall of one side of the top of the paint tank.

[0015] In one possible design, the support mechanism includes a base frame fixedly installed on one side of the construction frame, a bracket fixedly installed on the top of the base frame, and multiple rollers rotatably connected at equal intervals on the bracket. The bracket and the multiple rollers are used to support the insulated pipe body. Two support frames are symmetrically fixedly installed on the rollers. A rotating frame is rotatably connected inside the support frame. One side of the rotating frame extends to the outside of the support frame and is fixedly installed with a clamping plate. The clamping plate is used to position and clamp the insulated pipe body.

[0016] In one possible design, two support rings are symmetrically fixedly installed on the support frame, and a second insert rod is slidably connected through the support ring. Two second docking plates are symmetrically fixedly installed on the rotating frame. The second insert rod passes through the corresponding second docking plate and is engaged with the second docking plate. A second tension spring is also sleeved on the second insert rod. The two ends of the second tension spring are respectively fixedly connected to one side of the support ring and one end of the second insert rod through hooks set at both ends of the second tension spring.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0018] Beneficial effects: In this invention, the drive mechanism can drive the drive motor to rotate the active gear, which in turn rotates the support ring under the meshing transmission action with the gear ring. This drives the grinding mechanism and the painting mechanism to perform circular motion, thereby achieving uniform grinding of the welded part and painting of the ground welded part. This allows for the protection of the welded parts of the two insulated pipe bodies after they are connected, thus preventing problems such as rust from occurring later. In this invention, the grinding mechanism can move the movable box to the outside of the mounting box by activating the electric push rod. At this time, the grinding wheel can be driven to move closer to the welding part. Then, the grinding wheel can be driven to rotate at high speed by activating the servo motor. In this way, the grinding wheel can be used to perform preliminary grinding on the welding part. The mounting box can also move in a ring with the support ring, which can drive the grinding wheel to move in a ring, thereby enabling comprehensive grinding of the welding part and facilitating automated processing of the welding part. After passing the sandpaper strip through the perforations and the upper support plate, the top and bottom of the sandpaper strip are stably connected to the first and second clamping components, respectively. Then, when the electric push rod moves the moving box outwards from the mounting box, the moving box pulls the sandpaper strip. Under the action of the perforations, the sandpaper strip contracts inwards, tightly adhering to the welded part. Later, as the mounting box moves in a circular motion with the support ring, it moves the sandpaper strip, creating friction between the sandpaper strip and the welded part. This allows for further fine polishing of the welded part after rough polishing with a grinding wheel.

[0019] In this invention, the spraying mechanism allows the used sandpaper to be removed after the welded part is polished. Then, the paint is conveyed through the paint storage component to the annular conveyor box via the connecting pipe. After that, by starting the booster pump, the paint in the annular conveyor box is conveyed through the first conveyor pipe to the conical nozzle. The conical nozzle can then accurately spray the paint onto the polished welded part. When the support ring rotates, the booster pump drives the first conveyor pipe to rotate in annular motion. Since the sealing ring and the annular conveyor box are sealed and rotated together, the paint will not leak and the normal rotation of the booster pump will not be affected, thus enabling the welded part to be fully coated with paint. In this invention, the supporting mechanism allows the insulation pipe body to be placed on the bracket and then supported by multiple rollers. After that, by flipping the two rotating frames, the insulation pipe body is positioned and clamped by two clamping plates. This allows the insulation pipe body to be clamped and limited during grinding and painting of the welded parts, thus enabling accurate processing of the insulation pipe body.

[0020] The polyurethane insulation pipe outer surface uniform spraying device proposed in this invention solves the problem of traditional manual treatment of welded parts; through mechanical devices, it achieves stable clamping and positioning, automatic grinding and uniform spraying, which improves work efficiency and quality, ensures uniform treatment effect, and also reduces labor intensity, production costs and safety hazards. Attached Figure Description

[0021] Figure 1 This is a first-view three-dimensional structural schematic diagram of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention. Figure 2 This is a two-dimensional structural schematic diagram of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention. Figure 3 This is a three-dimensional cross-sectional view of the equipment frame structure of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of the equipment frame, support ring, booster pump, annular conveying box, sealing ring, and connection structure of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention. Figure 5 This is a cross-sectional view of the equipment frame of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention; Figure 6 This is a three-dimensional schematic diagram of the mounting box and sandpaper tape connection structure of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention. Figure 7 This is a cross-sectional view of the mounting box of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention. Figure 8 This is a three-dimensional cross-sectional view of the paint box structure of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the support mechanism of the polyurethane insulation pipe outer surface uniform spraying device provided in an embodiment of the present invention; Figure 10 This is a three-dimensional schematic diagram of the connection structure of two polyurethane insulation pipes connected by a uniform spraying device on the outer surface of the polyurethane insulation pipe provided in an embodiment of the present invention.

[0022] Figure label: 1. Construction frame; 2. Support ring; 3. Arc-shaped limiting plate; 4. Annular groove; 5. Drive motor; 6. Drive gear; 7. Gear ring; 8. Mounting box; 9. Moving box; 10. Electric push rod; 11. Support plate; 12. Sliding guide rod; 13. Mounting frame; 14. Servo motor; 15. Grinding wheel; 16. Support plate; 17. Rotating pressure plate; 18. Sandpaper belt; 19. Positioning plate; 20. First insertion rod; 21. First docking plate; 22. First tension spring; 23. Positioning screw; 24. Moving pressure plate; 25. Positioning nut; 26. Arc-shaped protective cover; 27. Annular groove. 28. Conveyor box; 29. ​​Sealing ring; 30. Booster pump; 31. First conveying pipe; 32. Conical nozzle; 33. Connecting pipe; 34. Second conveying pipe; 35. Equipment frame; 36. Conveying pump; 37. Paint box; 38. Injection pipe; 39. Stepper motor; 40. Support shaft; 41. Mixing rack; 42. Bend; 43. Base frame; 44. Bracket; 45. Support frame; 46. Rotating frame; 47. Support ring; 48. Second insertion rod; 49. Second connecting plate; 50. Second tension spring; 51. Clamping plate; 52. Insulated pipe body; 53. Welding section. Detailed Implementation

[0023] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to 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 embodiments of the present invention.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0027] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0028] Example 1: Refer to Figure 1-10A uniform spraying device comprises a construction frame 1, a support ring 2, a drive mechanism, a grinding mechanism, a painting mechanism, and a support mechanism. The construction frame 1 serves as the support frame for the entire device. The support ring 2 is rotatably connected inside the construction frame 1. Arc-shaped limiting plates 3 are fixedly installed on the inner walls of both sides of the construction frame 1. Annular grooves 4 are formed on both sides of the support ring 2. One side of the arc-shaped limiting plate 3 extends into the corresponding annular groove 4 and slides in connection with the inner wall of the annular groove 4.

[0029] like Figure 3-4 As shown, the drive mechanism includes a gear ring 7, a drive motor 5, a drive gear 6, and an arc-shaped protective cover 26. The gear ring 7 is fixedly sleeved on the support ring 2. The drive motor 5 is fixedly installed on one side of the construction frame 1, and its output shaft extends into the construction frame 1 and is fixedly installed with the drive gear 6, which meshes with the gear ring 7. The arc-shaped protective cover 26 is fixedly installed on the construction frame 1 to protect the gear ring 7. When the drive motor 5 is started, it drives the drive gear 6 to rotate. Through the meshing transmission with the gear ring 7, the support ring 2 rotates, which in turn drives the grinding mechanism and the painting mechanism to perform circular motion, achieving uniform treatment of the welded part 53.

[0030] like Figure 6-7 As shown, the grinding mechanism includes a mounting box 8, a movable box 9, sliding guide rods 12, a support plate 11, an electric push rod 10, a mounting frame 13, a servo motor 14, a grinding wheel 15, a sandpaper belt 18, a first clamping assembly, and a second clamping assembly. The mounting box 8 is fixedly installed inside the support ring 2, and the movable box 9 is slidably connected inside the mounting box 8. Two sliding guide rods 12 are fixedly installed at the top and bottom of the movable box 9, and support plates 11 are fixedly installed on the top and bottom inner walls of the mounting box 8, respectively. Two sliding guide rods 12 at the same height pass through the corresponding support plates 11 and are slidably connected to them, thus limiting the sliding movement of the movable box 9. The electric push rod 10 is fixedly installed on one inner wall of the mounting box 8 and located inside the movable box 9, with its output shaft fixedly connected to one inner wall of the movable box 9. The mounting frame 13 is fixedly installed on the side of the electric push rod 10 located outside the mounting box 8, and the servo motor 14 is fixedly installed on one side of the mounting frame 13, with its output shaft extending into the mounting frame 13 and fixing the grinding wheel 15 inside. The top inner wall of the mounting box 8 has a perforation. Sandpaper tape 18 is fitted onto the welding joint of the two insulated pipe bodies 52 and passes through the perforation and the support plate 11 located above.

[0031] like Figure 6As shown, the first clamping assembly includes a tray 16, a rotating pressure plate 17, a positioning plate 19, a first insert rod 20, a first mating plate 21, and a first tension spring 22. The tray 16 is fixedly installed on the bottom side of the mounting box 8, the rotating pressure plate 17 is rotatably connected to the top of the tray 16, and the bottom of the sandpaper belt 18 is located between the tray 16 and the rotating pressure plate 17. Two positioning plates 19 are symmetrically fixedly installed on the top of the tray 16, the first insert rod 20 is slidably connected to the positioning plate 19, and two first mating plates 21 are symmetrically fixedly installed on the top of the rotating pressure plate 17. The first insert rod 20 passes through the corresponding first mating plate 21 and is inserted and snapped into it. The first tension spring 22 is sleeved on the first insert rod 20, and the hooks at both ends of the spring are fixedly connected to one side of the positioning plate 19 and one end of the first insert rod 20, respectively.

[0032] like Figure 6 As shown, the second clamping assembly includes positioning screws 23, a movable pressure plate 24, and positioning nuts 25. Two positioning screws 23 are symmetrically fixedly installed on the top of one side of the movable box 9. The movable pressure plate 24 is sleeved on the two positioning screws 23 and is used to press the top of the sandpaper belt 18. Two positioning nuts 25 are symmetrically rotatably connected to one side of the movable pressure plate 24 and are respectively sleeved on the corresponding positioning screws 23 and threadedly connected to them.

[0033] When grinding the welded part 53, first activate the electric push rod 10 to move the moving box 9 outwards towards the mounting box 8, causing the grinding wheel 15 to approach the welded part 53. Then, activate the servo motor 14 to drive the grinding wheel 15 to rotate at high speed for preliminary grinding of the welded part 53. Simultaneously, pass the sandpaper strip 18 through the perforation and the upper support plate 11, and place its bottom on the support plate 16. Rotate the pressure plate 17 to align the first insertion rod 20 with the first mating plate 21. Release the first insertion rod 20, and the first tension spring 22 pulls the first insertion rod 20 through the first mating plate 21 to form a clamp, clamping and positioning the bottom of the sandpaper strip 18. Place the top of the sandpaper strip 18 between the moving box 9 and the moving pressure plate 24, and rotate the two positioning nuts 25 to move the moving pressure plate 24 closer to the moving box 9, positioning and clamping the top of the sandpaper strip 18. Then, the electric push rod 10 is activated again to move the moving box 9 outward, pulling the sandpaper belt 18 so that it retracts inward under the action of perforation and adheres tightly to the welding part 53. The mounting box 8 moves in a ring with the support ring 2, which drives the sandpaper belt 18 to move, forming friction with the welding part 53 and performing fine polishing on the welding part 53.

[0034] like Figure 4-5As shown, the painting mechanism includes an annular conveyor box 27, a sealing ring 28, a booster pump 29, a first delivery pipe 30, a conical nozzle 31, and a paint storage assembly. The annular conveyor box 27 is fixedly installed inside the construction frame 1, with its inner opening sealed and rotatably connected to the sealing ring 28. The booster pump 29 is fixedly installed on the bottom inner wall of the support ring 2, the first delivery pipe 30 is fixedly installed on the output end of the booster pump 29, and the conical nozzle 31 is fixedly installed on the suction end of the booster pump 29, with one end passing through the sealing ring 28 and tightly fixedly connected to it. The connecting pipe 32 is fixedly installed through and on one side inner wall of the annular conveyor box 27.

[0035] like Figure 8 As shown, the paint storage assembly includes an equipment rack 34, a delivery pump 35, a paint tank 36, a stepper motor 38, a support shaft 39, and a mixing rack 40. The equipment rack 34 is located on one side of the construction frame 1, and the delivery pump 35 and paint tank 36 are respectively fixedly mounted on the equipment rack 34. A bent pipe 41 is fixedly mounted on the suction end of the delivery pump 35, with its top extending into the outlet of the paint tank 36 and fixedly connected to the inner wall of the outlet. A second delivery pipe 33 is fixedly mounted on the output end of the delivery pump 35, with one end snapped into one end of a connecting pipe 32. The stepper motor 38 is fixedly mounted on the top of the paint tank 36, with its output shaft extending into the paint tank 36 and fixedly mounted on the support shaft 39. The mixing rack 40 is fixedly sleeved on the support shaft 39. A filling pipe 37 is fixedly mounted through and on the inner wall of the top side of the paint tank 36.

[0036] After grinding the welded part 53, the used sandpaper tape 18 is removed. Paint is delivered to the paint tank 36 through the injection pipe 37. The stepper motor 38 is started to drive the mixing rack 40 to rotate, stirring the paint to prevent sedimentation. The delivery pump 35 is started to draw paint out of the paint tank 36 and deliver it through the second delivery pipe 33 and the connecting pipe 32 to the annular delivery box 27. The booster pump 29 is started to deliver paint through the conical nozzle 31 to the first delivery pipe 30, spraying it onto the ground welded part 53. When the support ring 2 rotates, it drives the booster pump 29 and the first delivery pipe 30 in a circular motion. Because the sealing ring 28 is sealed and rotates in the annular delivery box 27, paint leakage is prevented and the normal operation of the booster pump 29 is not affected, achieving comprehensive spraying of the welded part 53.

[0037] This application can be used in the field of thermal insulation pipe processing technology, or in other fields applicable to this application.

[0038] Example 2: Reference Figure 9An improvement upon Embodiment 1: A polyurethane insulation pipe outer surface uniform spraying device, applied to the field of insulation pipe processing technology, includes a support mechanism comprising a base frame 42, a bracket 43, rollers 44, a support frame 45, a rotating frame 46, a clamping plate 51, a support ring 47, a second insert rod 48, a second connecting plate 49, and a second tension spring 50. The base frame 42 is fixedly installed on one side of the construction frame 1, and the bracket 43 is fixedly installed on the top of the base frame 42. Multiple rollers 44 are rotatably connected to the bracket 43 at equal intervals to support the insulation pipe body 52. ​​Two support frames 45 are symmetrically fixedly installed on the rollers 44, and the rotating frame 46 is rotatably connected inside the support frame 45, with one side extending to the outside of the support frame 45 and fixedly installed with a clamping plate 51 for positioning and clamping the insulation pipe body 52. Two support rings 47 are symmetrically fixedly mounted on the support frame 45. A second insert rod 48 is slidably connected inside the support ring 47. Two second mating plates 49 are symmetrically fixedly mounted on the rotating frame 46. The second insert rod 48 passes through the corresponding second mating plate 49 and is engaged with it. A second tension spring 50 is sleeved on the second insert rod 48, and the hooks at both ends of the spring 50 are fixedly connected to one side of the support ring 47 and one end of the second insert rod 48, respectively.

[0039] The insulated pipe body 52 is placed on the bracket 43 and supported by multiple rollers 44. The two rotating frames 46 are flipped so that the clamping plate 51 positions and clamps the insulated pipe body 52. ​​At this time, the second insertion rod 48 aligns with the second docking plate 49. The second insertion rod 48 is released, and the second tension spring 50 drives the second insertion rod 48 to move laterally, passing through the second docking plate 49 to form a clamp, positioning the rotating frame 46. This ensures that the clamping plate 51 stably and tightly clamps and positions the insulated pipe body 52, guaranteeing its stable position during grinding and painting of the welded part 53.

[0040] Working principle: In use, the two insulated pipe bodies 52 to be welded are first placed on the support mechanisms on both sides of the construction frame 1. The insulated pipe bodies 52 are placed on the multiple rollers 44 of the bracket 43 for rolling support. Then, the rotating frame 46 inside the support frame 45 is flipped so that the clamping plate 51 fits against the insulated pipe body 52. ​​At this time, the second insertion rod 48 passes through the second docking plate 49 under the action of the second tension spring 50 to form a clamp, completing the stable clamping and positioning of the insulated pipe body 52. ​​Next, the joint of the two insulated pipe bodies 52 is welded to form a welded part 53. The drive motor 5 in the drive mechanism is started, and its output shaft drives the drive gear 6 to rotate. The meshing transmission with the gear ring 7 causes the support ring 2 to rotate within the construction frame 1. As the support ring 2 rotates, it drives the grinding mechanism. First, the electric push rod 10 is activated to push the moving box 9 to the outside of the mounting box 8. During this movement, the servo motor 14 and the grinding wheel 15 on the mounting frame 13 move closer to the welding part 53. Then, the servo motor 14 is activated to make the grinding wheel 15 rotate at high speed, performing preliminary rough grinding on the welding part 53. Simultaneously, the mounting box 8 moves in a circular motion with the support ring 2, causing the grinding wheel 15 to thoroughly grind the welding part 53. After rough grinding, the sandpaper belt 18 is passed through the perforation at the top of the mounting box 8 and the upper support plate 11, with its bottom placed on the support plate 16. The pressure plate 17 is then rotated and pressed down. The sandpaper belt 18 is held in place, and the first insertion rod 20 is inserted and positioned by passing through the first mating plate 21 under the action of the first tension spring 22. The top of the sandpaper belt 18 is placed between the moving box 9 and the moving pressure plate 24. The positioning nut 25 is rotated to make the moving pressure plate 24 press the sandpaper belt 18 tightly. Then, the electric push rod 10 is activated again to push the moving box 9, so that the sandpaper belt 18 is tightly attached to the welded part 53 under the action of the perforation. The support ring 2 continues to rotate, driving the sandpaper belt 18 to rub against the welded part 53 to achieve fine grinding. After grinding is completed, the used sandpaper belt 18 is removed, and the stepper motor 38 in the paint storage component is started. Its output shaft drives the support shaft 39 and the stirring rack 40 to rotate in the paint box 36. Stir the paint to prevent sedimentation, and simultaneously start the delivery pump 35 to suck the paint out of the paint tank 36 through the bend pipe 41. The paint is then delivered to the annular delivery box 27 through the second delivery pipe 33 and the connecting pipe 32. Then, start the booster pump 29 to deliver the paint in the annular delivery box 27 to the conical nozzle 31 through the first delivery pipe 30. Finally, the paint is sprayed onto the polished welded part 53. When the support ring 2 rotates, it drives the booster pump 29 and the first delivery pipe 30 to move in annular motion. Because the sealing ring 28 is sealed and rotated in the annular delivery box 27, the paint does not leak and does not affect the normal operation of the booster pump 29. This achieves comprehensive paint protection treatment for the welded part 53 and avoids problems such as rusting later.

[0041] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 5, electric push rod 10, servo motor 14, booster pump 29, delivery pump 35 and stepper motor 38 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0042] The above are merely specific embodiments 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 technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A polyurethane insulation pipe outer surface uniform spraying device, comprising a construction frame (1), wherein a support ring (2) is rotatably connected inside the construction frame (1), characterized in that, A drive mechanism is installed on the construction frame (1), one side of which extends into the construction frame (1) and connects to the support ring (2). The uniform spraying device also includes: A grinding mechanism is set inside the support ring (2) to perform double grinding on the welded part (53) formed after the two insulated pipe bodies (52) are welded together; The painting mechanism is installed in the support ring (2), and one side of the painting mechanism extends to the outside of the construction frame (1). The painting mechanism is used to paint the polished part after the welded part (53) is polished, so as to form a protective coating. The support mechanisms set on both sides of the construction frame (1) are used to clamp and position the insulation pipe body (52) to be welded, so that when the welding part (53) is ground and painted, the two insulation pipe bodies (52) can be kept in a stable position without changing.

2. The polyurethane insulation pipe outer surface uniform spraying device according to claim 1, characterized in that, The drive mechanism includes a gear ring (7) fixedly sleeved on the support ring (2), a drive motor (5) fixedly installed on one side of the construction frame (1), the output shaft of the drive motor (5) extends into the construction frame (1) and a drive gear (6) is fixedly installed thereon, and the drive gear (6) meshes with the gear ring (7).

3. The polyurethane insulation pipe outer surface uniform spraying device according to claim 1, characterized in that, The grinding mechanism includes a mounting box (8) fixedly installed inside a support ring (2). A movable box (9) is slidably connected inside the mounting box (8). Two sliding guide rods (12) are fixedly installed at the top and bottom of the movable box (9). Support plates (11) are fixedly installed on the inner walls of the top and bottom of the mounting box (8). The two sliding guide rods (12) at the same height pass through the corresponding support plates (11) and are slidably connected to the support plates (11) to achieve sliding limit of the movable box (9). An electric push rod (10) located inside the movable box (9) is fixedly installed on the inner side wall. The output shaft of the electric push rod (10) is fixedly connected to the inner side wall of the movable box (9). A mounting bracket (13) is fixedly installed on the side of the electric push rod (10) located outside the mounting box (8). A servo motor (14) is fixedly installed on one side of the mounting bracket (13). The output shaft of the servo motor (14) extends into the mounting bracket (13) and a grinding wheel (15) is fixedly installed. The grinding wheel (15) is used to perform preliminary grinding on the welded part (53).

4. The polyurethane insulation pipe outer surface uniform spraying device according to claim 3, characterized in that, The grinding mechanism also includes a sandpaper strip (18) fitted onto the weld joint of the two insulated pipe bodies (52). A perforation is provided on the top inner wall of the mounting box (8). The sandpaper strip (18) passes through the perforation and the support plate (11) located above. A first clamping assembly is provided on the bottom side of the mounting box (8). The first clamping assembly is used to position and clamp the bottom of the sandpaper strip (18). A second clamping assembly is provided on the top side of the moving box (9). The second clamping assembly is used to clamp and position the top of the sandpaper strip (18).

5. The polyurethane insulation pipe outer surface uniform spraying device according to claim 4, characterized in that, The first clamping assembly includes a tray (16) fixedly installed on the bottom of one side of the mounting box (8). A rotating pressure plate (17) is rotatably connected to the top of the tray (16). The bottom of the sandpaper strip (18) is located between the tray (16) and the rotating pressure plate (17). The rotating pressure plate (17) is used to clamp and position the bottom of the sandpaper strip (18). Two positioning plates (19) are symmetrically fixedly installed on the top of the tray (16). A first insert rod (20) is slidably connected through the positioning plate (19). Two first docking plates (21) are symmetrically fixedly installed on the top of the rotating pressure plate (17). The first insert rod (20) passes through the corresponding first docking plate (21) and is inserted and snapped into the first docking plate (21). A first tension spring (22) is sleeved on the first insert rod (20). The two ends of the first tension spring (22) are respectively fixedly connected to one side of the positioning plate (19) and one end of the first insert rod (20) through hooks set at both ends of the first tension spring (22).

6. The polyurethane insulation pipe outer surface uniform spraying device according to claim 4 or 5, characterized in that, The second clamping assembly includes two positioning screws (23) symmetrically fixedly installed on the top of one side of the movable box (9). The same movable pressure plate (24) is sleeved on the two positioning screws (23). The movable pressure plate (24) is used to press the top of the sandpaper strip (18). Two positioning nuts (25) are symmetrically rotatably connected on one side of the movable pressure plate (24). The two positioning nuts (25) are respectively sleeved on the corresponding positioning screws (23) and threadedly connected to the positioning screws (23).

7. The polyurethane insulation pipe outer surface uniform spraying device according to claim 1, characterized in that, The painting mechanism includes an annular conveyor box (27) fixedly installed in the construction frame (1), a sealing ring (28) is rotatably connected to the inner opening of the annular conveyor box (27), a booster pump (29) is fixedly installed on the bottom inner wall of the support ring (2), a first conveying pipe (30) is fixedly installed on the output end of the booster pump (29), a conical nozzle (31) is fixedly installed on the suction end of the booster pump (29), one end of the conical nozzle (31) passes through the sealing ring (28) and is tightly fixedly connected to the sealing ring (28), a connecting pipe (32) is fixedly installed through one side inner wall of the annular conveyor box (27), and a paint storage component is also provided on one side of the construction frame (1).

8. The polyurethane insulation pipe outer surface uniform spraying device according to claim 7, characterized in that, The paint storage assembly includes an equipment rack (34) located on one side of the construction frame (1). A delivery pump (35) and a paint tank (36) are fixedly installed on the equipment rack (34). A bent pipe (41) is fixedly installed on the suction end of the delivery pump (35). The top end of the bent pipe (41) extends into the outlet of the paint tank (36) and is fixedly connected to the inner wall of the outlet. A second delivery pipe (33) is fixedly installed on the output end of the delivery pump (35). One end of the second delivery pipe (33) is engaged with one end of the connecting pipe (32). A stepper motor (38) is fixedly installed on the top of the paint tank (36). The output shaft of the stepper motor (38) extends into the paint tank (36) and a support shaft (39) is fixedly installed. A mixing rack (40) is fixedly sleeved on the support shaft (39). An injection pipe (37) is fixedly installed through the inner wall of the top side of the paint tank (36).

9. The polyurethane insulation pipe outer surface uniform spraying device according to claim 1, characterized in that, The supporting mechanism includes a base frame (42) fixedly installed on one side of the construction frame (1). A bracket (43) is fixedly installed on the top of the base frame (42). Multiple rollers (44) are rotatably connected at equal intervals on the bracket (43). The bracket (43) and the multiple rollers (44) are used to support the insulation pipe body (52). Two support frames (45) are symmetrically fixedly installed on the rollers (44). A rotating frame (46) is rotatably connected inside the support frame (45). One side of the rotating frame (46) extends to the outside of the support frame (45) and is fixedly installed with a clamp (51). The clamp (51) is used to position and clamp the insulation pipe body (52).

10. The polyurethane insulation pipe outer surface uniform spraying device according to claim 9, characterized in that, Two rings (47) are symmetrically fixedly installed on the support frame (45). A second rod (48) is slidably connected through the ring (47). Two second mating plates (49) are symmetrically fixedly installed on the rotating frame (46). The second rod (48) passes through the corresponding second mating plate (49) and is engaged with the second mating plate (49). A second tension spring (50) is also sleeved on the second rod (48). The two ends of the second tension spring (50) are respectively fixedly connected to one side of the ring (47) and one end of the second rod (48) through hooks set at both ends of the second tension spring (50).

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