Steel pipe joint coating device and method integrating rust removal, welding and spraying
By integrating clamping, grinding, ventilation, and spraying mechanisms, the steel pipe joint repair device solves the problem of uneven grinding in traditional manual grinding, achieves uniform grinding and sealing of steel pipe weld joints, and improves corrosion resistance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-30
- Publication Date
- 2026-04-07
AI Technical Summary
When manually grinding the welded joints of steel pipes, the grinding amount on both sides is inconsistent, resulting in inconsistent adhesion of the thermal expansion strip, forming voids, wrinkles, and gaps on the outer wall of the pipe, which affects the anti-corrosion effect and safety.
A steel pipe joint repair device integrating rust removal, welding, and spraying is designed. It adopts a clamping mechanism, a grinding mechanism, a ventilation mechanism, and a belt winding mechanism. Through servo motor drive, synchronous motor adjustment, and ventilation hood adsorption of fumes, it ensures uniform grinding and spraying quality. Combined with the hot rolling of the thermal expansion belt, it achieves uniform grinding and sealing of the welded joints.
This method achieves consistent grinding amounts on both sides of the welded joint of the steel pipe, reduces height differences, improves the circumference and corrosion resistance of the welded area, extends the life of the grinding strip, and ensures the sealing and safety of the welded area.
Smart Images
Figure CN121798481A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steel pipe repair technology, specifically to a steel pipe repair device and method that integrates rust removal, welding, and spraying. Background Technology
[0002] In long-distance oil and gas pipelines, urban water supply and drainage pipelines, and industrial fluid transportation pipelines, steel pipes are connected over long distances by welding. The weld joint and surrounding area are the core weak points in pipeline corrosion protection. The high temperature of welding can damage the original anti-corrosion coating of the steel pipe, resulting in exposed weld joints. Defects such as weld protrusions, surface oxide scale, and rust remaining from the welding process can easily allow anti-corrosion media to penetrate, causing localized corrosion. After long-term operation, weld perforation, media leakage, and even safety accidents such as explosions and environmental pollution may occur. Therefore, rust removal, smoothing, grinding, and anti-corrosion sealing of the weld joint directly determine the overall operational safety and service life of the steel pipe and are indispensable key procedures in steel pipe construction. Traditionally, grinding rusted areas at welded joints of steel pipes is done manually by technicians using grinding tools and relying on their own grinding experience. During the grinding process, manual operation and control of grinding force and range can easily lead to inconsistent grinding amounts on both sides of the welded joint, resulting in height differences. When heat-expanding tape is subsequently used to wrap and adhere to this area, the slight height difference can cause inconsistent adhesion between the two ends of the heat-expanding tape, resulting in air pockets, wrinkles, and gaps between the tape and the outer wall of the pipe after adhesion. To address the aforementioned problems, the inventors have proposed a steel pipe repair device and method that integrates rust removal, welding, and spraying to solve these issues. Summary of the Invention
[0003] To address the problem of inconsistent grinding amounts on both sides of weld joints in traditional manual steel pipe grinding, the present invention aims to provide a steel pipe joint repair device and method that integrates rust removal, welding, and spraying.
[0004] To solve the above technical problems, the present invention adopts the following technical solution: a steel pipe repair device integrating rust removal, welding and spraying, including a support frame, a clamping mechanism, a driving mechanism and a steel pipe. Two sets of clamping mechanisms are respectively installed on the top of the support frame and connected to each other. The steel pipe is arranged on the inner side of the middle of the two sets of clamping mechanisms. The driving mechanism is installed on the clamping mechanism to drive the steel pipe. Two guide grooves are respectively opened at both ends of the top of the support frame. A grinding mechanism and a winding mechanism are slidably connected between the two guide grooves. The grinding mechanism grinds along the welded joints of the steel pipe and its two sides. The grinding mechanism includes grinding strips for grinding and removing rust from the outer wall of the steel pipe and an adjustment structure for fine-tuning the grinding strips. The adjustment structure is used to simultaneously fine-tune multiple grinding strips so that the amount of grinding and rust removal at the welded joints and on both sides of the steel pipe remains consistent. The grinding mechanism is equipped with a ventilation mechanism, and the grinding end of the grinding mechanism is equipped with an air inlet. The grinding mechanism drives the ventilation mechanism, and one end of the ventilation mechanism is connected to the air inlet of the grinding mechanism for cleaning and heat dissipation of the grinding end of the grinding mechanism.
[0005] Preferably, the clamping mechanism includes a servo motor, gears, a gear ring, a U-shaped rack, and rollers. A connecting bearing ring is fixedly connected to the outer wall of the support frame. The gear ring is rotatably connected to the outer wall of the connecting bearing ring. Several gears are rotatably connected to the outer wall of the support frame. The gears and the gear ring mesh. The servo motor is mounted on the outer wall of the support frame. The output shaft of the servo motor is connected to one of the gears. The rollers are rotatably connected to one end of the U-shaped rack. The U-shaped rack is slidably connected to the outer wall of the connecting bearing ring, and the U-shaped rack meshes with the gear.
[0006] Preferably, the driving mechanism includes a drive motor and a drive wheel. A mounting base is fixedly connected to the outer wall of the U-shaped rack. The drive motor is mounted on the outer wall of the mounting base. The drive wheel is connected to the output shaft of the drive motor. The drive wheel and the roller synchronously approach the outer wall of the steel pipe.
[0007] Preferably, the grinding mechanism further includes an L-shaped frame, a second screw, and a cylindrical frame. The two L-shaped frames are slidably connected to the inner wall of the guide groove at the top of the support frame. The second screw passes through and is rotatably connected to the guide groove. The second screw passes through one end of the L-shaped frame and is threaded. The cylindrical frame is rotatably connected between the bottoms of two L-shaped frames. A synchronous motor is installed on the outer wall of the L-shaped frame. A rotating shaft is connected to the output shaft of the synchronous motor. A synchronous pulley is connected to one end of the rotating shaft and one end of the cylindrical frame. A synchronous belt is connected between the two synchronous pulleys. Several of the aforementioned polishing strips are respectively inserted into the outer wall of the cylinder frame.
[0008] Preferably, the adjustment structure includes a tapered threaded pipe and a bolt, the bolt being rotatably connected to the cylinder frame, a sliding groove notch being provided on the outer wall of the cylinder frame, and a movable plate being slidably connected to the sliding groove notch, wherein a portion of the grinding strip is inserted into the outer wall of the movable plate; The threaded end of the bolt is threadedly connected to a threaded sleeve, and a connecting arm is rotatably connected between the threaded sleeve and the movable plate. The tapered threaded pipe is threaded onto the synchronous pulley of the cylinder frame, and one end of the bolt is fixedly connected to a cone, with the tapered end of the tapered threaded pipe tightly fitted to the cone; The grinding strip is detachably connected to the movable plate and the cylinder frame by a pressure plate.
[0009] Preferably, the outer wall of the cylinder frame has multiple rows of ventilation holes, and the inner wall of the cylinder frame is fixedly connected with an arc-shaped guide plate, forming a flow channel between the arc-shaped guide plate and the ventilation holes. The middle part of the cylinder frame is provided with a recessed grinding rubber strip for grinding the welded joints of the steel pipe.
[0010] Preferably, the ventilation mechanism includes a ventilation hood, a ventilation pipe, and fan blades. The ventilation hood is installed on the outer wall of the L-shaped frame. One end of the second screw is rotatably connected to one end of the cylinder frame and communicates with it. The other end of the second screw is communicated with the ventilation hood. The rotating shaft passes through the interior of the ventilation hood. The fan blades are installed on the outer wall of the rotating shaft. A magnetic tapered pipe is connected to the outer wall of the ventilation hood. A spray pipe is connected to the outer wall of the L-shaped frame. The spray pipe has several exhaust holes facing the steel pipe.
[0011] Preferably, the winding mechanism includes a long rod and a drum. The two ends of the long rod are slidably connected to the inner wall of a guide groove. A first screw is rotatably connected to the guide groove, passing through the guide groove and being rotatably connected. The first screw is threaded through one end of the long rod. The drum is rotatably connected to the outer wall of the long rod. A heat-expanding tape is wound around the outer wall of the drum. A U-shaped frame is fixedly connected to the outer wall of the long rod. A heating mechanism for heating the heat-expanding tape is rotatably connected to the outer wall of the U-shaped frame.
[0012] Preferably, the heating mechanism includes a roller and a conical heating tube, the roller being rotatably connected to the outer wall of one end of the U-shaped frame, and a plurality of the conical heating tubes being installed inside the roller.
[0013] A method for using a steel pipe jointing device that integrates rust removal, welding, and spraying includes the following steps: Step 1: Place the steel pipe between two clamping mechanisms to self-clamp the steel pipe, and drive the steel pipe to rotate through the drive mechanism; Step 2: Adjust the grinding mechanism to be close to the outer wall of the steel pipe for grinding. During the grinding process, the grinding mechanism is cleaned and cooled by the ventilation mechanism. After the grinding is completed, the grinding area of the steel pipe is sprayed by connecting to the external spraying equipment through the spray pipe. Step 3: After grinding and spraying, wrap the grinding area of the steel pipe with a heat-expanding tape, and then use a heating mechanism to heat-roll the heat-expanding tape to complete the repair of the steel pipe.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes a cylindrical frame, grinding strips, and an adjustment structure with recessed grinding rubber strips on the cylindrical frame. Simultaneously, the grinding strips on the cylindrical frame, driven by the driving mechanism, rotate the steel pipe, allowing the grinding strips distributed on both sides of the welded joint of the steel pipe to grind simultaneously. The adjustment structure allows for gradual, minute adjustments to the stroke of the grinding strips on the cylindrical frame. Furthermore, rotating the second screw drives the L-shaped frame to move, further adjusting the fit between the grinding strips and the recessed grinding rubber strips and the welded joint and sides of the steel pipe, reducing grinding deviations on both sides, and thus improving the circumference of the outer wall of the steel pipe in the grinding area.
[0015] 2. By setting up a ventilation mechanism, the present invention enables the grinding mechanism to simultaneously drive the ventilation mechanism during the grinding process of the steel pipe weld rust area. The grinding end of the grinding mechanism is provided with an air inlet, and one end of the ventilation mechanism is connected to the air inlet of the grinding mechanism for cleaning and heat dissipation of the grinding end of the grinding mechanism. This reduces the heat and dust generated during the grinding process, thereby extending the service life of the grinding strip and improving the working environment during grinding. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0018] Figure 2 This is a schematic diagram of the tape winding mechanism and heating mechanism of the present invention.
[0019] Figure 3 This is a schematic diagram of the support frame and clamping mechanism of the present invention.
[0020] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at point A in the middle.
[0021] Figure 5 This is a schematic diagram of the tube frame structure of the present invention.
[0022] Figure 6 This is a schematic diagram of the flow channel structure of the present invention.
[0023] Figure 7 This is a schematic diagram of the interior of the ventilation mechanism and the grinding mechanism of the present invention.
[0024] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at point B.
[0025] In the diagram: 1. Support frame; 101. Guide groove; 2. Clamping mechanism; 21. Servo motor; 22. Gear; 23. Gear ring; 24. U-shaped rack; 25. Mounting base; 26. Connecting support ring; 27. Roller; 3. Drive mechanism; 31. Drive motor; 32. Drive wheel; 4. Belt winding mechanism; 41. Long rod; 42. Drum; 43. Thermally expandable belt; 44. First screw; 45. U-shaped frame; 5. Heating mechanism; 51. Roller; 52. Conical heating tube; 6. Grinding Mechanism; 61. L-shaped frame; 62. Second screw; 63. Synchronous motor; 64. Rotating shaft; 65. Synchronous belt; 66. Cylindrical frame; 660. Grinding strip; 661. Pressure plate; 662. Ventilation hole; 67. Arc-shaped guide plate; 68. Tapered threaded pipe; 69. Bolt; 690. Connecting arm; 691. Movable plate; 692. Cone; 7. Spraying pipe; 8. Steel pipe; 9. Ventilation mechanism; 91. Ventilation hood; 92. Ventilation pipe; 93. Fan blade; 94. Magnetic tapered tube. Detailed Implementation
[0026] 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.
[0027] like Figure 1 - Figure 8 As shown, the present invention provides a steel pipe repair device integrating rust removal, welding and spraying, including a support frame 1, a clamping mechanism 2, a driving mechanism 3 and a steel pipe 8. Two sets of clamping mechanisms 2 are respectively installed on the top of the support frame 1 and connected to each other. The steel pipe 8 is set on the inner side of the middle of the two sets of clamping mechanisms 2. The driving mechanism 3 is installed on the clamping mechanism 2 to drive the steel pipe 8. Two guide grooves 101 are respectively opened at both ends of the top of the support frame 1. A grinding mechanism 6 is slidably connected between the two guide grooves 101. The grinding mechanism 6 grinds along the welding joints of the steel pipe 8 and its two sides. The grinding mechanism 6 includes a grinding strip 660 for grinding and removing rust from the outer wall of the steel pipe 8 and an adjustment structure for fine-tuning the grinding strip 660. The adjustment structure is used to simultaneously fine-tune multiple grinding strips 660 so that the amount of grinding and removing rust from the welded joints and both sides of the steel pipe 8 remains consistent. The grinding mechanism 6 is equipped with a ventilation mechanism 9. The grinding end of the grinding mechanism 6 is equipped with an air inlet. The grinding mechanism 6 drives the ventilation mechanism 9. One end of the ventilation mechanism 9 is connected to the air inlet of the grinding mechanism 6 for cleaning and heat dissipation of the grinding end of the grinding mechanism 6.
[0028] The clamping mechanism 2 includes a servo motor 21, a gear 22, a gear ring 23, a U-shaped rack 24, and a roller 27. A connecting bearing ring 26 is fixedly connected to the outer wall of the bearing frame 1. The gear ring 23 is rotatably connected to the outer wall of the connecting bearing ring 26. Several gears 22 are rotatably connected to the outer wall of the bearing frame 1. The gears 22 and the gear ring 23 mesh. The servo motor 21 is mounted on the outer wall of the bearing frame 1. The output shaft of the servo motor 21 is connected to one of the gears 22. The roller 27 is rotatably connected to one end of the U-shaped rack 24. The U-shaped rack 24 is slidably connected to the outer wall of the connecting bearing ring 26, and the U-shaped rack 24 meshes with the gear 22; The purpose of this setup is to drive one of the gears 22 to rotate via the output shaft of the servo motor 21. The gear 22 meshes with and drives the gear ring 23 to rotate, synchronously driving the other gears 22 to rotate. At the same time, it meshes with and drives the U-shaped rack 24 to move, thereby allowing several U-shaped racks 24 to move closer together or disperse. This is suitable for clamping steel pipes 8 of different diameters. The steel pipe 8 is clamped between several rollers 27, and the steel pipe 8 can rotate between several rollers 27.
[0029] The drive mechanism 3 includes a drive motor 31 and a drive wheel 32. A mounting base 25 is fixedly connected to the outer wall of the U-shaped rack 24. The drive motor 31 is mounted on the outer wall of the mounting base 25. The drive wheel 32 is connected to the output shaft of the drive motor 31. The drive wheel 32 and the roller 27 synchronously approach the outer wall of the steel pipe 8. The purpose of this arrangement is that after the steel pipe 8 is clamped by the clamping mechanism 2, the drive motor 31 and the drive wheel 32 move and adjust along with the U-shaped rack 24 to fit against the outer wall of the steel pipe 8. The output shaft of the drive motor 31 drives the drive wheel 32 to rotate. Under the clamping action of the clamping mechanism 2, the drive wheel 32 and the steel pipe 8 remain in close contact. Under the action of rotational friction, the drive wheel 32 drives the steel pipe 8 to rotate.
[0030] The grinding mechanism 6 also includes an L-shaped frame 61, a second screw 62, and a cylindrical frame 66. The two L-shaped frames 61 are slidably connected to the inner wall of the guide groove 101 at the top of the support frame 1. The second screw 62 passes through and is rotatably connected to the guide groove 101. The second screw 62 passes through one end of the L-shaped frame 61 and is threaded. The cylinder frame 66 is rotatably connected between the bottoms of two L-shaped frames 61. A synchronous motor 63 is installed on the outer wall of the L-shaped frame 61. A rotating shaft 64 is connected to the output shaft of the synchronous motor 63. A synchronous pulley is connected to one end of the rotating shaft 64 and one end of the cylinder frame 66. A synchronous belt 65 is connected between the two synchronous pulleys for transmission. Several polishing strips 660 are respectively inserted into the outer wall of the cylinder frame 66; The purpose of this configuration is to drive the rotating shaft 64 to rotate via the output shaft of the synchronous motor 63, which in turn drives the cylinder frame 66 and its grinding strip 660 to rotate via the synchronous pulley and synchronous belt 65. When the grinding strip 660 rotates, it grinds the outer wall of the steel pipe 8. By rotating the second screw 62, the L-shaped frame 61 is moved, thereby adjusting the grinding strip 660 to fit the steel pipe 8 to accommodate steel pipes 8 of different diameters.
[0031] The adjustment structure includes a tapered threaded pipe 68 and a bolt 69. The bolt 69 is rotatably connected to the cylinder frame 66. A sliding groove notch is provided on the outer wall of the cylinder frame 66. A movable plate 691 is slidably connected to the sliding groove notch. A portion of the grinding strip 660 is inserted into the outer wall of the movable plate 691. The threaded end of bolt 69 is threadedly connected to a threaded sleeve, and a connecting arm 690 is rotatably connected between the threaded sleeve and the movable plate 691. The tapered threaded tube 68 is threaded onto the synchronous pulley of the tube frame 66, and one end of the bolt 69 is fixedly connected to the cone 692, with the tapered end of the tapered threaded tube 68 closely fitting the cone 692; The grinding strip 660 is detachably connected to the movable plate 691 and the cylinder frame 66 by a pressure plate 661; The purpose of this setup is to allow the screw sleeve to move by rotating the bolt 69, which in turn rotates with the connecting arm 690. The connecting arm 690 then pushes the movable plate 691, causing the movable plate 691 to move the grinding strip 660 to the outside of the cylinder frame 66 for fine adjustment. This allows the strip to be closer to the outer wall of the steel pipe 8, increasing the amount of grinding. By rotating the tapered threaded tube 68, the tapered end of the tapered threaded tube 68 is made to rub tightly against the cone 692, thus preventing the bolt 69 from loosening and causing incorrect adjustments during the grinding process.
[0032] Multiple rows of ventilation holes 662 are provided on the outer wall of the cylindrical frame 66. An arc-shaped guide plate 67 is fixedly connected to the inner wall of the cylindrical frame 66. A guide channel is formed between the arc-shaped guide plate 67 and the ventilation holes 662. A recessed grinding rubber strip is provided in the middle of the cylindrical frame 66 for grinding the welding joints of the steel pipe 8. The purpose of this design is to create an airflow channel for heat dissipation of the barrel frame 66 and the grinding strip 660. While the airflow is in place, it also absorbs and carries away the spark particles and soot generated during grinding, preventing sparks from splashing.
[0033] The ventilation mechanism 9 includes a ventilation hood 91, a ventilation pipe 92, and a fan blade 93. The ventilation hood 91 is installed on the outer wall of the L-shaped frame 61. One end of the second screw 62 is rotatably connected to one end of the cylindrical frame 66 and communicates with it. The other end of the second screw 62 is communicated with the ventilation hood 91. The rotating shaft 64 passes through the interior of the ventilation hood 91. The fan blade 93 is installed on the outer wall of the rotating shaft 64. A magnetic tapered pipe 94 is connected to the outer wall of the ventilation hood 91. A spray pipe 7 is connected to the outer wall of the L-shaped frame 61. The spray pipe 7 has several exhaust holes facing the steel pipe 8. The purpose of this setup is that during the rotation of the rotating shaft 64, the fan blades 93 are driven to rotate. The fan blades 93 and the cylinder frame 66 rotate at the same speed. The higher the grinding intensity, the higher the wind speed of the fan blades 93. The airflow enters quickly through the vent 662, drawing in spark particles and dust. The airflow passes through the guide channel, ventilation pipe 92, and ventilation hood 91. The magnetic conical tube 94 adsorbs the particles generated during the grinding of the steel pipe 8. During the airflow process, the cylinder frame 66 and the grinding strip 660 are cooled to prevent the temperature from rising due to grinding. At the same time, the grinding strip 660 collides and vibrates with the steel pipe 8 to prevent the vent 662 from becoming blocked. After the grinding and rust removal are completed, the spray pipe 7 is connected to the external anti-rust paint spraying equipment beforehand, and then the ground part is sprayed through several exhaust holes of the spray pipe 7.
[0034] The winding mechanism 4 includes a long rod 41 and a drum 42. The two ends of the long rod 41 are slidably connected to the inner wall of the guide groove 101. A first screw 44 is rotatably connected to the guide groove 101. The first screw 44 passes through the guide groove 101 and is rotatably connected. The first screw 44 passes through one end of the long rod 41 and is threaded. The drum 42 is rotatably connected to the outer wall of the long rod 41. A heat-expanding tape 43 is wound on the outer wall of the drum 42. A U-shaped frame 45 is fixedly connected to the outer wall of the long rod 41. A heating mechanism 5 for heating the heat-expanding tape 43 is rotatably connected to the outer wall of the U-shaped frame 45. The purpose of this setup is that after the steel pipe 8 is ground and sprayed, the grinding mechanism 6 stops rotating, one end of the heat-expanding tape 43 is attached to the weld joint of the steel pipe 8, and the driving mechanism 3 drives the steel pipe 8 to rotate, so that the heat-expanding tape 43 is wrapped around the outer wall of the steel pipe 8. During the wrapping process, the heat-expanding tape 43 is rubbed between the cylinder frame 66 and the steel pipe 8. When the cylinder frame 66 stops running, under the action of friction, the cylinder frame 66 rolls the heat-expanding tape 43 to keep the heat-expanding tape 43 wrapped and attached.
[0035] The heating mechanism 5 includes a roller 51 and a tapered heating tube 52. The roller 51 is rotatably connected to the outer wall of one end of the U-shaped frame 45, and several tapered heating tubes 52 are installed inside the roller 51. The purpose of this setup is to use the first screw 44 to drive the long rod 41 along the guide groove 101 to cut the heat-expanding tape 43 after winding. The roller 51 is then brought close to the wound heat-expanding tape 43 for hot rolling. The thicker end of the tapered heating tube 52 is close to the middle of the roller 51, and the thinner end is close to both ends of the roller 51. This allows the wound heat-expanding tape 43 to be heated gradually from the middle to both sides. The middle is heated first and then shrinks, gradually shrinking outwards. This helps to remove air from the winding gaps of the heat-expanding tape 43, preventing it from becoming air pockets and thus improving the effect of hot rolling.
[0036] A method for using a steel pipe jointing device that integrates rust removal, welding, and spraying includes the following steps: Step 1: Place the steel pipe 8 between the two clamping mechanisms 2 to self-clamp the steel pipe 8, and drive the steel pipe 8 to rotate through the drive mechanism 3; Step 2: Adjust the grinding mechanism 6 to be close to the outer wall of the steel pipe 8 for grinding. During the grinding process, the grinding mechanism 6 is cleaned and cooled by the ventilation mechanism 9. After the grinding is completed, the external spraying equipment is connected through the spray pipe 7 to spray the grinding area of the steel pipe 8. Step 3: After grinding and spraying, the grinding area of the steel pipe 8 is wrapped with the heat-expanding tape 43, and then the heat-expanding tape 43 is hot-rolled by the heating mechanism 5 to complete the repair of the steel pipe 8.
[0037] Working principle: The steel pipe 8 is placed between two clamping mechanisms 2 for adaptive clamping. The output shaft of the servo motor 21 drives one of the gears 22 to rotate. The gear 22 meshes with and drives the gear ring 23 to rotate, synchronously driving the other gears 22 to rotate. At the same time, it meshes with and drives the U-shaped rack 24 to move, so that several U-shaped racks 24 can move closer together or disperse. This is suitable for clamping steel pipes 8 of different diameters. The steel pipe 8 is clamped between several rollers 27 and can rotate between several rollers 27. After the steel pipe 8 is clamped by the clamping mechanism 2, the drive motor 31 and the drive wheel 32 move and adjust following the U-shaped rack 24, and fit against the outer wall of the steel pipe 8. The output shaft of the drive motor 31 drives the drive wheel 32 to rotate. Under the clamping action of the clamping mechanism 2, the drive wheel 32 and the steel pipe 8 remain in close contact. Under the action of rotational friction, the drive wheel 32 drives the steel pipe 8 to rotate. The output shaft of the synchronous motor 63 drives the rotating shaft 64 to rotate, and the synchronous pulley and synchronous belt 65 drive the cylinder frame 66 and its grinding strip 660 to rotate. When the grinding strip 660 rotates, it grinds the outer wall of the steel pipe 8. The L-shaped frame 61 is driven to move by rotating the second screw 62, so that the grinding strip 660 can be adjusted to fit the steel pipe 8 to adapt to steel pipes 8 of different diameters. By rotating the bolt 69, the threaded drive sleeve moves, and the sleeve rotates with the connecting arm 690. The connecting arm 690 pushes the movable plate 691, which in turn drives the grinding strip 660 to move slightly outward toward the outer side of the cylinder frame 66 to get closer to the outer wall of the steel pipe 8 and increase the amount of grinding. By rotating the tapered threaded tube 68, the tapered end of the tapered threaded tube 68 is tightly rubbed against the cone 692, thereby preventing the bolt 69 from loosening and causing incorrect adjustment during the grinding process. During the rotation of the rotating shaft 64, the fan blade 93 is driven to rotate. The fan blade 93 rotates at the same speed as the cylinder frame 66. The wind speed of the fan blade 93 increases synchronously with the grinding intensity. The airflow enters quickly through the ventilation hole 662, sucking in spark particles and dust. After passing through the guide channel, ventilation pipe 92, and ventilation hood 91, the magnetic conical tube 94 adsorbs the particles generated by grinding the steel pipe 8. During the airflow process, the cylinder frame 66 and grinding strip 660 are cooled to prevent the temperature from rising due to grinding. At the same time, the grinding strip 660 collides with the steel pipe 8 during grinding, and the vibration prevents the ventilation hole 662 from being blocked. After grinding and rust removal are completed, the spray pipe 7 is connected to the external anti-rust paint spraying equipment in advance, and then the ground part is sprayed through several exhaust holes of the spray pipe 7. After the steel pipe 8 is ground and sprayed, the grinding mechanism 6 stops rotating and attaches one end of the heat-expanding tape 43 to the weld joint of the steel pipe 8. The driving mechanism 3 drives the steel pipe 8 to rotate, and the heat-expanding tape 43 is wrapped around the outer wall of the steel pipe 8. During the wrapping process, the heat-expanding tape 43 is rubbed between the cylinder frame 66 and the steel pipe 8. When the cylinder frame 66 stops running, under the action of friction, the cylinder frame 66 rolls the heat-expanding tape 43 to keep the heat-expanding tape 43 wrapped and attached. By rotating the first screw 44, the threaded drive rod 41 moves along the guide groove 101 to cut the heat-expanding tape 43 after winding. The adjusting roller 51 is close to the wound heat-expanding tape 43 for hot rolling. The thicker end of the tapered heating tube 52 is close to the middle of the roller 51, and the thinner end is close to both ends of the roller 51. This allows the wound heat-expanding tape 43 to be heated gradually from the middle to both sides. The middle is heated first and then shrinks, gradually shrinking outwards. This helps to remove air from the winding gap of the heat-expanding tape 43, preventing it from blistering and thus improving the effect of hot rolling.
[0038] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A steel pipe jointing device integrating rust removal, welding, and spraying, comprising a support frame (1), a clamping mechanism (2), a driving mechanism (3), and a steel pipe (8), characterized in that: The two sets of clamping mechanisms (2) are respectively installed on the top of the support frame (1) and connected to each other. The steel pipe (8) is set on the inner side of the middle of the two sets of clamping mechanisms (2). The driving mechanism (3) is installed on the clamping mechanism (2) to drive the steel pipe (8). The top two ends of the support frame (1) are respectively provided with two guide grooves (101), and a grinding mechanism (6) and a winding mechanism (4) are slidably connected between the two guide grooves (101). The grinding mechanism (6) grinds along the welding joint of the steel pipe (8) and its two sides. The grinding mechanism (6) includes a grinding strip (660) for grinding and removing rust from the outer wall of the steel pipe (8) and an adjustment structure for fine-tuning the grinding strip (660). The adjustment structure is used to simultaneously fine-tune multiple grinding strips (660) so that the amount of grinding and removing rust from the welded joints and both sides of the steel pipe (8) remains consistent. The polishing mechanism (6) is provided with a ventilation mechanism (9). The polishing end of the polishing mechanism (6) is provided with an air inlet. The polishing mechanism (6) drives the ventilation mechanism (9). One end of the ventilation mechanism (9) is connected to the air inlet of the polishing mechanism (6) for cleaning and heat dissipation of the polishing end of the polishing mechanism (6).
2. The steel pipe repair device integrating rust removal, welding, and spraying as described in claim 1, characterized in that, The clamping mechanism (2) includes a servo motor (21), a gear (22), a gear ring (23), a U-shaped rack (24), and a roller (27). A connecting bearing ring (26) is fixedly connected to the outer wall of the support frame (1). The gear ring (23) is rotatably connected to the outer wall of the connecting bearing ring (26). Several gears (22) are rotatably connected to the outer wall of the support frame (1). The gears (22) and the gear ring (23) mesh. The servo motor (21) is installed on the outer wall of the support frame (1). The output shaft of the servo motor (21) is connected to one of the gears (22). The roller (27) is rotatably connected to one end of the U-shaped rack (24). The U-shaped rack (24) is slidably connected to the outer wall of the connecting bearing ring (26), and the U-shaped rack (24) meshes with the gear (22).
3. The steel pipe repair device integrating rust removal, welding, and spraying as described in claim 2, characterized in that, The drive mechanism (3) includes a drive motor (31) and a drive wheel (32). A mounting base (25) is fixedly connected to the outer wall of the U-shaped rack (24). The drive motor (31) is mounted on the outer wall of the mounting base (25). The drive wheel (32) is connected to the output shaft of the drive motor (31). The drive wheel (32) and the roller (27) synchronously approach the outer wall of the steel pipe (8).
4. The steel pipe repair device integrating rust removal, welding, and spraying as described in claim 3, characterized in that, The grinding mechanism (6) also includes an L-shaped frame (61), a second screw (62) and a cylindrical frame (66). The two L-shaped frames (61) are slidably connected to the inner wall of the guide groove (101) at the top of the support frame (1). The second screw (62) passes through and is rotatably connected to the guide groove (101). The second screw (62) passes through one end of the L-shaped frame (61) and is threaded. The cylindrical frame (66) is rotatably connected between the bottoms of two L-shaped frames (61). A synchronous motor (63) is installed on the outer wall of the L-shaped frame (61). A rotating shaft (64) is connected to the output shaft of the synchronous motor (63). A synchronous pulley is connected to one end of the rotating shaft (64) and the cylindrical frame (66). A synchronous belt (65) is connected between the two synchronous pulleys. Several of the aforementioned polishing strips (660) are respectively inserted into the outer wall of the cylinder frame (66).
5. A steel pipe repair device integrating rust removal, welding, and spraying as described in claim 4, characterized in that, The adjustment structure includes a tapered threaded tube (68) and a bolt (69). The bolt (69) is rotatably connected to the cylinder frame (66). A sliding groove notch is provided on the outer wall of the cylinder frame (66). A movable plate (691) is slidably connected to the sliding groove notch. A portion of the grinding strip (660) is inserted into the outer wall of the movable plate (691). The threaded end of the bolt (69) is threadedly connected to a threaded sleeve, and a connecting arm (690) is rotatably connected between the threaded sleeve and the movable plate (691). The tapered threaded tube (68) is threaded onto the synchronous pulley of the cylinder frame (66), and one end of the bolt (69) is fixedly connected to a cone (692). The tapered end of the tapered threaded tube (68) is tightly fitted with the cone (692). The grinding strip (660) is detachably connected to the movable plate (691) and the cylinder frame (66) with a pressure plate (661).
6. The steel pipe repair device integrating rust removal, welding, and spraying as described in claim 5, characterized in that, Multiple rows of ventilation holes (662) are provided on the outer wall of the cylindrical frame (66). An arc-shaped guide plate (67) is fixedly connected to the inner wall of the cylindrical frame (66). A flow channel is formed between the arc-shaped guide plate (67) and the ventilation holes (662). A recessed grinding rubber strip is provided in the middle of the cylindrical frame (66) for grinding the welding joints of the steel pipe (8).
7. A steel pipe repair device integrating rust removal, welding, and spraying as described in claim 6, characterized in that, The ventilation mechanism (9) includes a ventilation hood (91), a ventilation pipe (92), and a fan blade (93). The ventilation hood (91) is installed on the outer wall of the L-shaped frame (61). One end of the second screw (62) is rotatably connected to one end of the cylindrical frame (66) and communicates with it. The other end of the second screw (62) is communicated with the ventilation hood (91). The rotating shaft (64) passes through the interior of the ventilation hood (91). The fan blade (93) is installed on the outer wall of the rotating shaft (64). A magnetic tapered tube (94) is connected to the outer wall of the ventilation hood (91). A spray pipe (7) is connected to the outer wall of the L-shaped frame (61). The spray pipe (7) has several exhaust holes facing the steel pipe (8).
8. The steel pipe repair device integrating rust removal, welding, and spraying as described in claim 7, characterized in that, The winding mechanism (4) includes a long rod (41) and a drum (42). The two ends of the long rod (41) are slidably connected to the inner wall of the guide groove (101). A first screw (44) is rotatably connected to the guide groove (101). The first screw (44) passes through the guide groove (101) and is rotatably connected. The first screw (44) passes through one end of the long rod (41) and is threaded. The drum (42) is rotatably connected to the outer wall of the long rod (41). A heat-shrinkable tape (43) is wound on the outer wall of the drum (42). A U-shaped frame (45) is fixedly connected to the outer wall of the long rod (41). A heating mechanism (5) for heating the heat-shrinkable tape (43) is rotatably connected to the outer wall of the U-shaped frame (45).
9. A steel pipe repair device integrating rust removal, welding, and spraying as described in claim 8, characterized in that, The heating mechanism (5) includes a roller (51) and a conical heating tube (52). The roller (51) is rotatably connected to the outer wall of one end of the U-shaped frame (45), and several conical heating tubes (52) are installed inside the roller (51).
10. The method of using the steel pipe repair device integrating rust removal, welding, and spraying as described in claim 9, characterized in that, The following steps are required: Step 1: Place the steel pipe (8) between the two clamping mechanisms (2) to perform adaptive clamping on the steel pipe (8), and drive the steel pipe (8) to rotate through the drive mechanism (3); Step 2: Adjust the grinding mechanism (6) to be close to the outer wall of the steel pipe (8) for grinding. During the grinding process, the grinding mechanism (6) is cooled and cleaned by the ventilation mechanism (9). After the grinding is completed, the external spraying equipment is connected through the spray pipe (7) to spray the grinding area of the steel pipe (8). Step 3: After grinding and spraying, the grinding area of the steel pipe (8) is wrapped with a heat-expanding tape (43), and then the heat-expanding tape (43) is hot-rolled by a heating mechanism (5) to complete the repair of the steel pipe (8).