Manufacturing equipment for wear-resistant and corrosion-resistant pipeline with polyurethane lining

Abstract

The invention relates to the technical field of anti-corrosion pipeline manufacturing, and discloses manufacturing equipment of a polyurethane lining wear-resistant anti-corrosion pipeline, which comprises a metal pipe to be derusted, and further comprises a moving mechanism arranged in the metal pipe and used for axially moving in the metal pipe; the adjusting mechanism is arranged on the moving mechanism and used for adjusting the moving mechanism to abut against the inner wall of the metal pipe; and the rotating mechanism is arranged on one side of the moving mechanism and used for rotating the L-shaped rotating pipe to derust the inner wall of the metal pipe. Rotary shot blasting rust removal and high-frequency mechanical impact are combined, the composite cleaning effect is achieved, steel shots are evenly sprayed to the pipe wall through the rotating L-shaped rotating pipe, and wide-coverage rust removal treatment is carried out; and meanwhile, the striking assembly driven by the rolling wheel enables the striking block to continuously and violently strike the pipe wall, and through the synergistic effect of shot blasting and jarring, thick rust layers, oxide skins and stubborn pollutants which are extremely high in adhesive force can be effectively loosened and stripped.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion pipe manufacturing technology, specifically to a manufacturing equipment for polyurethane-lined wear-resistant and anti-corrosion pipes. Background Technology

[0002] In many industrial fields such as petroleum, chemical, mining, and dredging, metal pipelines that transport fluids (especially slurries containing solid particles) face serious wear and corrosion problems. To extend the service life of pipelines, high-performance wear-resistant and corrosion-resistant linings such as polyurethane are often prepared on their inner walls. The success of this process depends to a large extent on the quality of the pretreatment of the inner wall of the metal pipe. A clean, rough, and highly active inner wall surface is the key to ensuring that the lining is firmly bonded to the substrate and preventing it from falling off.

[0003] Currently, the pretreatment of the inner wall of metal pipes, especially long-distance, large-diameter, or curved pipes, faces the following technical bottlenecks: Existing inner wall treatment methods, such as single sandblasting, mechanical wire brush grinding, or chemical cleaning, each have limitations. Sandblasting has limited effectiveness against thick rust layers and oxide scale with strong adhesion; mechanical grinding easily produces a polishing effect, reducing surface roughness; chemical cleaning has environmental and residue issues. These methods are all difficult to achieve full-area, uniform surface treatment with optimal anchor pattern morphology in complex pipes, leading to potential risks of blistering and peeling of polyurethane linings. Therefore, a manufacturing equipment for polyurethane-lined wear-resistant and corrosion-resistant pipes is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a manufacturing equipment for polyurethane-lined wear-resistant and corrosion-resistant pipes, addressing the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a manufacturing equipment for polyurethane-lined wear-resistant and corrosion-resistant pipes, comprising a metal pipe to be derusted, and further comprising: A moving mechanism, disposed inside the metal tube, is used for axial movement inside the metal tube; An adjustment mechanism is provided on the moving mechanism and is used to adjust the contact between the moving mechanism and the inner wall of the metal tube. A rotating mechanism, located on one side of the moving mechanism, is used to rotate the L-shaped rotating pipe to the rust removal position on the inner wall of the metal pipe. The moving mechanism includes: Two mounting discs are located inside the metal tube; Multiple sliding components are equidistantly arranged in a circular pattern on the mounting disc for moving along the inner wall of the metal tube. A torsion assembly, positioned between two mounting discs, is used to connect the two mounting discs and to twist during movement, for movement within a curved metal tube; Multiple pull rings are fixedly connected to the outer wall of the mounting disc on the right side, and are used to pull the moving mechanism.

[0006] Preferably, the torsion assembly includes: Two fixed tubes are respectively fixedly connected to the inner wall of the mounting hole opened at the center of the mounting disc; Two conveying pipes are connected to the inner wall of the fixed pipe via multiple connecting rods, and are used to convey steel shot thrown out by the shot blasting machine; Two spherical sleeves are rotatably connected to the outer walls of two conveying pipes, and a double-headed ball tube is fitted on the outer wall of the two spherical sleeves. This double-headed ball tube is used to twist on the outer wall of the two spherical sleeves when the two mounting discs move on the inner wall of the curved metal pipe. A corrugated hose connects two delivery pipes and is used to connect the two delivery pipes to the bent metal pipe for conveying steel shot.

[0007] Preferably, the adjustment mechanism includes: Two gear discs are rotatably connected to the outer walls of two fixed tubes via bearings and are located inside the two mounting discs; Multiple movable holes are equidistantly arranged in a circle on each mounting disc, and a sliding rod is movably connected in each movable hole for moving within the movable hole to push a sliding component mounted on the sliding rod to accommodate metal tubes of different diameters; Multiple sliding holes are equidistantly arranged in a circle on each gear disc, and a sliding column is fixedly connected to the outer wall of each sliding rod. The sliding column moves through the movable hole and slides on the inner wall of the sliding hole to push the sliding column to move within the movable hole.

[0008] Preferably, the adjustment mechanism further includes: Multiple limiting sleeves are fixedly connected to the outer wall of the mounting disc, and the sliding rod slides on the inner wall of the limiting sleeve; Two mounting blocks are fixedly connected to the outer walls of the two mounting discs, respectively. Motor 1 is fixedly connected to the outer wall of the mounting block, and the output end of Motor 1 moves through the mounting block and extends toward the gear disk side; The gear is fixedly sleeved on the outer wall of one extension end of the motor, and the gear meshes with the tooth grooves on the outer wall of the gear disk to drive the gear disk to rotate.

[0009] Preferably, the rotating mechanism includes: The connecting sleeve is fixedly connected to the inner wall of the left fixed pipe, and the inner wall of the connecting sleeve is rotatably connected to an L-shaped rotating pipe, which is connected to the left conveying pipe. The movable tube, threaded to the inner wall of the L-shaped swivel tube, is used to adjust the distance from the inner wall of the metal tube by twisting. The transmission box is mounted on the outer wall of the mounting disc on the left side and is connected to the L-shaped rotating pipe; Motor 2 is installed on the outer wall of the transmission box, and the output end of Motor 2 is connected to the transmission box, driving the L-shaped rotary tube to rotate through the transmission box.

[0010] Preferably, the rotating mechanism further includes: A circular track is fixedly connected to the outer wall of the mounting disc on the left side; The sliding strut is fixedly connected to the outer wall of the L-shaped rotating tube, and the other side of the sliding strut is fitted onto the outer wall of the annular rail for sliding.

[0011] Preferably, the sliding component includes: The movable rod is slidably connected to a circular hole at the bottom of the slide bar, and a spring is installed in the circular hole to push the movable rod downward. Multiple limiting rods are connected to the outer wall of the movable rod in pairs and slide within the limiting hole opened on the outer wall of the sliding rod; The roller is rotatably connected to the movable rod and rolls along the inner wall of the metal tube. The striking component, located on the outer wall of the movable rod, is used to strike the metal tube.

[0012] Preferably, the striking component includes: A fixed sleeve is fixedly connected to the bottom of the slide rod, and the movable rod slides along the inner wall of the fixed sleeve; Two fixed plates are fixedly connected to the outer wall of the movable rod; Two U-shaped rods are slidably connected to the fixed sleeve and two fixed plates, respectively; Multiple springs are respectively sleeved on the outer wall of the U-shaped rod, and a retaining ring is fixedly sleeved on the outer wall of the U-shaped rod for pushing the retaining ring and the U-shaped rod downward; Two levers are fixedly connected to the outer wall of the U-shaped rod, and turntables are fixedly sleeved on both sides of the outer wall of the roller shaft; The lever is fixedly connected to the outer wall of the turntable and is used to move the lever to drive the U-shaped rod upward. The impact block, fixedly attached to the bottom of the U-shaped rod, is used to strike the metal pipe.

[0013] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. The manufacturing equipment for this polyurethane-lined wear-resistant and corrosion-resistant pipe combines rotary shot blasting with high-frequency mechanical impact to achieve a composite cleaning effect. The rotating L-shaped tube evenly sprays steel shot onto the pipe wall for wide-coverage rust removal. Simultaneously, the roller-driven impact component causes the impact blocks to continuously and violently strike the pipe wall. This synergistic effect of "shot blasting + vibration" effectively loosens and peels off thick rust layers, oxide scale, and stubborn contaminants with extremely strong adhesion, which is difficult to achieve with single shot blasting or grinding processes. It provides extremely high surface cleanliness and activity for subsequent polyurethane lining spraying, fundamentally ensuring excellent adhesion between the lining and the pipe wall and eliminating the hidden dangers of lining blistering and detachment.

[0014] 2. The manufacturing equipment for this polyurethane-lined wear-resistant and corrosion-resistant pipe uses an adjustable mechanism to drive multiple sliding rods to move radially in sync. This allows the rollers to quickly and accurately adapt to and press against the inner walls of pipes of different diameters. More importantly, the torsion assembly connecting the two mounting discs, through the flexible connection of a double-ended ball tube and a corrugated hose, gives the entire equipment the ability to flexibly turn and move stably within curved pipes. This design solves the industry pain point that rigid equipment cannot operate in complex pipe networks, achieving integrated processing of straight and curved pipes and greatly expanding the application range of the equipment.

[0015] 3. The manufacturing equipment for this polyurethane-lined wear-resistant and corrosion-resistant pipe utilizes the movement within the pipe to provide power for the auxiliary cleaning function. The rotation of the rollers is converted into the lifting power of the striking components through the turntable and lever. This eliminates the need for an additional power source for high-frequency mechanical impact, achieving an energy-saving effect of "cleaning while moving". It reduces energy consumption and equipment complexity, and ensures a natural synchronization between the rust removal striking action and the equipment's movement speed, improving the uniformity of processing and overall efficiency.

[0016] 4. The manufacturing equipment for this polyurethane-lined wear-resistant and corrosion-resistant pipe features a sliding strut and ring rail support structure for the rotating L-shaped pipe. This effectively suppresses vibration and swaying caused by high-speed rotation and shot peening recoil, ensuring the stability of the shot peening trajectory. Simultaneously, the threaded connection of the movable pipe allows for fine-tuning of the distance between the nozzle and the pipe wall, thereby precisely controlling the impact intensity and coverage of the shot peening. This high stability and adjustability ensures a uniform treatment effect during the inner wall pretreatment stage, laying a solid foundation for manufacturing high-quality wear-resistant and corrosion-resistant pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention located inside the pipeline; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the rear structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the exploded structure of the present invention; Figure 6 This is a schematic diagram of the adjustment mechanism structure of the present invention; Figure 7 This is a schematic diagram of the sliding component structure of the present invention; Figure 8 This is a schematic diagram of the striking component structure of the present invention.

[0018] In the picture: 1. Metal pipe; 2. Moving mechanism; 21. Mounting disc; 22. Sliding assembly; 221. Movable rod; 222. Spring 1; 223. Limiting rod; 224. Roller; 225. Striking component; 2251. Fixing sleeve; 2252. Fixing plate; 2253. U-shaped rod; 2254. Spring II; 2255. Retaining ring; 2256. Lever; 2257. Turntable; 2258. Pulley block; 2259. Impact block; 23. Fixed pipe; 24. Pull ring; 25. Delivery pipe; 26. Corrugated hose; 27. Spherical sleeve; 28. Double-ended X-ray tube; 3. Adjustment mechanism; 31. Gear disk; 32. Sliding hole; 33. Sliding column; 34. Sliding rod; 35. Limit sleeve; 36. Mounting block; 37. Gear; 38. Motor 1; 4. Rotating mechanism; 41. Connecting sleeve; 42. L-shaped rotating tube; 43. Transmission box; 44. Motor II; 45. Movable tube; 46. Circular rail; 47. Sliding support rod. Detailed Implementation

[0019] 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.

[0020] Please refer to Figure XX. One embodiment of the present invention is: a manufacturing apparatus for a polyurethane-lined wear-resistant and corrosion-resistant pipe, comprising a metal pipe 1 to be derusted, and further comprising: The moving mechanism 2 is located inside the metal tube 1 and is used for axial movement inside the metal tube 1; Adjustment mechanism 3 is provided on the moving mechanism 2 and is used to adjust the moving mechanism 2 against the inner wall of the metal tube 1. The rotating mechanism 4 is located on one side of the moving mechanism 2 and is used to rotate the L-shaped rotating pipe 42 to the rust removal position on the inner wall of the metal pipe 1. The mobile mechanism 2 includes: Two mounting discs 21 are disposed inside the metal tube 1; Multiple sliding components 22 are equidistantly arranged in a circular pattern on the mounting disk 21 for moving along the inner wall of the metal tube 1. A torsion assembly, disposed between two mounting discs 21, is used to connect the two mounting discs 21 and to twist during movement, for movement within the curved metal tube 1; Multiple pull rings 24 are fixedly connected to the outer wall of the mounting disc 21 on the right side and are used to pull the moving mechanism 2.

[0021] The torsion assembly includes: Two fixed tubes 23 are respectively fixedly connected to the inner wall of the mounting hole opened at the axis of the mounting disc 21; Two conveying pipes 25 are connected to the inner wall of the fixed pipe 23 by multiple connecting rods, and are used to convey steel shot thrown out by the shot blasting machine. Two spherical sleeves 27 are rotatably connected to the outer walls of two conveying pipes 25, and a double-headed ball tube 28 is fitted on the outer wall of the two spherical sleeves 27, which is used to make the double-headed ball tube 28 twist on the outer wall of the two spherical sleeves 27 when the two mounting discs 21 move on the inner wall of the curved metal pipe 1. The corrugated hose 26 is connected between the two delivery pipes 25 and is used to connect the two delivery pipes 25 to the bent metal pipe 1 for conveying steel shot.

[0022] Adjustment mechanism 3 includes: Two gear disks 31 are rotatably connected to the outer walls of two fixed tubes 23 via bearings, and are located inside the two mounting disks 21; Multiple movable holes are equidistantly arranged in a circle on each mounting disc 21, and a sliding rod 34 is movably connected in each movable hole for moving within the movable hole to push the sliding component 22 mounted on the sliding rod 34 to adapt to metal tubes 1 of different diameters; Multiple sliding holes 32 are circumferentially and equidistantly opened on each gear disk 31, and a sliding column 33 is fixedly connected to the outer wall of each sliding rod 34. The sliding column 33 moves through the movable hole and slides on the inner wall of the sliding hole 32 to push the sliding column 33 to move within the movable hole.

[0023] The regulating mechanism 3 also includes: Multiple limiting sleeves 35 are fixedly connected to the outer wall of the mounting disc 21, and the sliding rod 34 slides on the inner wall of the limiting sleeve 35; Two mounting blocks 36 are respectively fixedly connected to the outer walls of two mounting discs 21; Motor 38 is fixedly connected to the outer wall of mounting block 36, and the output end of motor 38 moves through mounting block 36 and extends toward the gear disk 31. Gear 37 is fixedly sleeved on the outer wall of the extension end of motor 38, and gear 37 meshes with the tooth grooves on the outer wall of gear disk 31 to drive gear disk 31 to rotate.

[0024] Rotating mechanism 4 includes: The connecting sleeve 41 is fixedly connected to the inner wall of the left fixed pipe 23, and the inner wall of the connecting sleeve 41 is rotatably connected to the L-shaped rotating pipe 42, and the L-shaped rotating pipe 42 is connected to the left conveying pipe 25. The movable tube 45 is threaded to the inner wall of the L-shaped rotating tube 42 and is used to adjust the distance from the inner wall of the metal tube 1 by twisting. The transmission box 43 is installed on the outer wall of the left mounting disc 21 and is connected to the L-shaped rotating pipe 42; Motor 2 44 is installed on the outer wall of transmission box 43, and the output end of motor 2 44 is connected to transmission box 43, driving L-shaped rotary tube 42 to rotate through transmission box 43.

[0025] The rotating mechanism 4 also includes: The annular track 46 is fixedly connected to the outer wall of the mounting disc 21 on the left side; The sliding strut 47 is fixedly connected to the outer wall of the L-shaped rotating tube 42, and the other side of the sliding strut 47 is sleeved on the outer wall of the annular rail 46 and slides.

[0026] The sliding component 22 includes: The movable rod 221 is slidably connected to a circular hole at the bottom of the slide rod 34, and a spring 222 is provided in the circular hole to push the movable rod 221 to move downward. Multiple limiting rods 223 are connected in pairs to the outer wall of the movable rod 221 and slide on the inner wall of the limiting hole opened on the outer wall of the slide rod 34; Roller 224 is rotatably connected to movable rod 221 and rolls on the inner wall of metal tube 1; The striking component 225 is disposed on the outer wall of the movable rod 221 and is used to strike the metal tube 1.

[0027] The striking component 225 includes: The fixed sleeve 2251 is fixedly connected to the bottom of the slide rod 34, and the movable rod 221 slides within the inner wall of the fixed sleeve 2251; Two fixed plates 2252 are fixedly connected to the outer wall of the movable rod 221; Two U-shaped rods 2253 are slidably connected to the fixed sleeve 2251 and the two fixed plates 2252, respectively; Multiple springs 2254 are respectively sleeved on the outer wall of the U-shaped rod 2253, and a retaining ring 2255 is fixedly sleeved on the outer wall of the U-shaped rod 2253 for pushing the retaining ring 2255 and the U-shaped rod 2253 downward; Two levers 2256 are fixedly connected to the outer wall of the U-shaped rod 2253, and turntables 2257 are fixedly sleeved on both sides of the outer wall of the roller 224. The lever 2258 is fixedly connected to the outer wall of the turntable 2257 and is used to move the lever 2256 to drive the U-shaped rod 2253 upward. Impact block 2259 is fixedly connected to the bottom of U-shaped rod 2253 and is used to strike metal tube 1.

[0028] Working principle: The assembled equipment is placed inside the metal tube 1 to be processed. Based on the diameter of the metal tube 1, the roller 224 is adjusted to contact the inner wall of the metal tube 1. At this time, the adjustment mechanism 3 is activated, and the motor 38 drives the gear 37 to rotate, which in turn drives the meshing gear disk 31 to rotate. Simultaneously, the sliding hole 32 on the gear disk 31 rotates. Since the sliding column 33 is confined within the sliding hole 32 and is fixed to the sliding rod 34, the rotation of the gear disk 31 drives all the sliding rods 34 to synchronously extend or retract radially within the movable hole of the mounting disc 21. Through the above adjustment, the roller 224 in the sliding assembly 22 at the end of the sliding rod 34 is tightly pressed against the inner wall of the metal tube 1, thereby achieving precise alignment and fixation of the equipment within the pipeline. When traveling and bending the pipeline, the pull ring 24 is pulled by an external traction device, such as a winch, so that the entire equipment moves axially within the tube 1. When the tube 1 is bent, the two mounting discs 21 will deflect relative to each other due to the change in path. At this time, the torsion assembly connecting the two plays a role. The double-ended ball tube 28 rotates flexibly on the ball sleeves 27 at both ends, while the corrugated hose 26 in the middle bends, thus allowing the entire equipment to pass through the bend smoothly without getting stuck. During the rotary rust removal and synchronous impact cleaning stage, the motor 44 of the rotating mechanism 4 is started. The power drives the L-shaped rotating tube 42 to rotate through the transmission box 43. The steel shot produced by the shot blasting machine is transported to the L-shaped rotating tube 42 through the conveying pipe 25 and the corrugated hose 26, and is sprayed out at high speed from its horizontal end to remove rust from the inner wall of the metal tube 1. One end of the sliding support rod 47 is fixed on the L-shaped rotating tube 42, and the other end slides on the ring rail 46, providing stable radial support for the high-speed rotating L-shaped rotating tube 42 and preventing it from shaking. Furthermore, while the equipment is moving and rotating to remove rust, the striking component 225 works synchronously. When the equipment is moving, the roller 224 rotates due to friction with the inner wall of the metal pipe 1, which drives the turntable 2257 on its shaft to rotate. The paddle 2258 on the turntable 2257 periodically moves the lever 2256 during rotation, thereby driving the U-shaped rod 2253 to overcome the elastic force of the second spring 2254 and lift upward. When the paddle 2258 slides past the lever 2256, the U-shaped rod 2253, under the huge elastic force of the second spring 2254, drives the impact block 2259 at the bottom to violently and at high speed impact the inner wall of the pipe. This high-frequency mechanical impact complements the shot blasting rust removal. The impact can loosen and peel off those thick rust layers and oxide scales with strong adhesion, creating favorable conditions for subsequent shot blasting. Meanwhile, the movable tube 45 can be used to fine-tune the distance between the L-shaped rotating tube 42 nozzle and the tube wall to control the shot peening intensity, while the spring 222 ensures that the roller 224 is always in close contact with the tube wall, maintaining effective contact and drive even on uneven surfaces, and can adapt to metal tubes 1 of different diameters.

[0029] This invention provides a manufacturing device for polyurethane-lined wear-resistant and corrosion-resistant pipes. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe, comprising a metal pipe (1) to be derusted, characterized in that, Also includes: The moving mechanism (2) is disposed inside the metal tube (1) and is used to move axially inside the metal tube (1); Adjustment mechanism (3) is provided on the moving mechanism (2) and is used to adjust the moving mechanism (2) against the inner wall of the metal tube (1); The rotating mechanism (4) is located on one side of the moving mechanism (2) and is used to rotate the L-shaped rotating tube (42) to the rust removal position of the inner wall of the metal tube (1); The moving mechanism (2) includes: Two mounting discs (21) are disposed inside the metal tube (1); Multiple sliding components (22) are arranged equidistantly on the mounting disc (21) in a circular pattern for moving along the inner wall of the metal tube (1); A torsion assembly, disposed between two mounting discs (21), is used to connect the two mounting discs (21) and to twist during movement, for movement within a curved metal tube (1); Multiple pull rings (24) are fixedly connected to the outer wall of the mounting disc (21) on the right side for pulling the moving mechanism (2).

2. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 1, characterized in that: The torsion assembly includes: Two fixed tubes (23) are respectively fixedly connected to the inner wall of the mounting hole opened at the axis of the mounting disc (21); Two conveying pipes (25) are connected to the inner wall of the fixed pipe (23) by multiple connecting rods, respectively, for conveying steel shot thrown out by the shot blasting machine; Two spherical sleeves (27) are rotatably connected to the outer walls of two conveying pipes (25), and a double-headed ball tube (28) is fitted on the outer wall of the two spherical sleeves (27) for twisting on the outer wall of the two spherical sleeves (27) when the two mounting discs (21) move on the inner wall of the curved metal pipe (1); A corrugated hose (26) is connected between two delivery pipes (25) to connect the two delivery pipes (25) to the bent metal pipe (1) for conveying steel shot.

3. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 2, characterized in that: The adjustment mechanism (3) includes: Two gear disks (31) are rotatably connected to the outer walls of two fixed tubes (23) via bearings, and are located inside the two mounting disks (21); Multiple movable holes are equidistantly arranged on each mounting disc (21) in a circular pattern, and a sliding rod (34) is movably connected in each movable hole for moving within the movable hole to push the sliding assembly (22) mounted on the sliding rod (34) to accommodate metal tubes (1) of different diameters. Multiple sliding holes (32) are equidistantly arranged on each gear disk (31) in a circular pattern, and a sliding column (33) is fixedly connected to the outer wall of each sliding rod (34). The sliding column (33) moves through the movable hole and slides on the inner wall of the sliding hole (32) to push the sliding column (33) to move within the movable hole.

4. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 3, characterized in that: The adjustment mechanism (3) further includes: Multiple limiting sleeves (35) are fixedly connected to the outer wall of the mounting disc (21), and the sliding rod (34) slides on the inner wall of the limiting sleeve (35); Two mounting blocks (36) are fixedly connected to the outer walls of two mounting discs (21), respectively; Motor 1 (38) is fixedly connected to the outer wall of the mounting block (36), and the output end of motor 1 (38) moves through the mounting block (36) and extends toward the gear disk (31); Gear (37) is fixedly sleeved on the outer wall of the extension end of motor (38), and gear (37) meshes with the tooth groove of the outer wall of gear disk (31) to drive gear disk (31) to rotate.

5. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 4, characterized in that: The rotating mechanism (4) includes: The connecting sleeve (41) is fixedly connected to the inner wall of the left fixed tube (23), and the inner wall of the connecting sleeve (41) is rotatably connected to the L-shaped rotating tube (42), and the L-shaped rotating tube (42) is connected to the left conveying tube (25). The movable tube (45) is threaded to the inner wall of the L-shaped rotating tube (42) and is used to adjust the distance from the inner wall of the metal tube (1). The transmission box (43) is installed on the outer wall of the left mounting disc (21) and connected to the L-shaped rotating pipe (42); Motor 2 (44) is installed on the outer wall of transmission box (43), and the output end of motor 2 (44) is connected to transmission box (43), driving L-shaped rotary tube (42) to rotate through transmission box (43).

6. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 5, characterized in that: The rotating mechanism (4) further includes: A ring track (46) is fixedly connected to the outer wall of the mounting disc (21) on the left side; The sliding strut (47) is fixedly connected to the outer wall of the L-shaped rotating tube (42), and the other side of the sliding strut (47) is sleeved on the outer wall of the ring rail (46) and slides.

7. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 6, characterized in that: The sliding component (22) includes: The movable rod (221) is slidably connected to the circular hole at the bottom of the slide rod (34), and a spring (222) is provided in the circular hole to push the movable rod (221) downward. Multiple limiting rods (223) are connected in pairs to the outer wall of the movable rod (221) and slide on the inner wall of the limiting hole opened on the outer wall of the slide rod (34); Roller (224) is rotatably connected to movable rod (221) and rolls on the inner wall of metal tube (1); The striking component (225) is disposed on the outer wall of the movable rod (221) and is used to strike the metal tube (1).

8. The manufacturing equipment for a polyurethane-lined wear-resistant and corrosion-resistant pipe according to claim 7, characterized in that: The striking component (225) includes: The fixed sleeve (2251) is fixedly connected to the bottom of the slide rod (34), and the movable rod (221) slides on the inner wall of the fixed sleeve (2251); Two fixed plates (2252) are fixedly connected to the outer wall of the movable rod (221); Two U-shaped rods (2253) are slidably connected to the fixed sleeve (2251) and two fixed plates (2252), respectively; Multiple springs (2254) are respectively sleeved on the outer wall of the U-shaped rod (2253), and a retaining ring (2255) is fixedly sleeved on the outer wall of the U-shaped rod (2253) for pushing the retaining ring (2255) and the U-shaped rod (2253) downward. Two levers (2256) are fixedly connected to the outer wall of the U-shaped rod (2253), and turntables (2257) are fixedly sleeved on both sides of the outer wall of the roller (224). The lever (2258) is fixedly connected to the outer wall of the turntable (2257) and is used to move the lever (2256) to drive the U-shaped rod (2253) upward; The impact block (2259) is fixedly connected to the bottom of the U-shaped rod (2253) and is used to strike the metal tube (1).

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