A tower pipe laying system

Abstract

The application discloses a tower pipe-laying system and belongs to the technical field of ship pipe-laying. The system comprises a laying tower arranged at the stern of a pipe-laying ship, a pipeline traction device, a driving mechanism and two rotating support frames symmetrically arranged on the laying tower. The two ends of the laying tower are respectively provided with arc-shaped guide components and arc-shaped guide rails arranged in the same circle center, the two ends of the rotating support frames are respectively in sliding fit with the arc-shaped guide components and the arc-shaped guide rails, and the two rotating support frames are connected with a centering wheel mechanism through a connecting component. The driving mechanism can drive the rotating support frames to move along the arc-shaped tracks, drive the centering wheel mechanism to rotate and adjust the spatial orientation, and accurately guide the pipeline to the traction device. The application solves the problems of insufficient pipeline centering precision, easy wearing of a guide mechanism and easy swinging of the pipeline, which affects the pipe-laying efficiency and operation safety, and can significantly improve the pipeline centering precision, the pipe-laying efficiency and the offshore operation safety.

Description

Technical Field

[0001] This invention relates to the field of marine pipelaying technology, and more specifically to a tower pipelaying system. Background Technology

[0002] With the continuous advancement of marine resource development, ship-based pipelaying technology faces new challenges. Currently, tower-type pipelaying systems exhibit significant technical bottlenecks in actual operation: due to the excessively large drum size (typically exceeding 10 meters in diameter), significant sag (up to 15-20 meters) occurs during pipe release. This makes it difficult for the pipe to accurately pass through the alignment wheel of the pipelaying system, leading to abnormal wear and positioning deviations in the guiding mechanism. Furthermore, pipes that fail to pass through the alignment wheel are prone to violent swaying under marine environmental loads, not only reducing pipelaying efficiency but also posing a serious threat to operational safety. To address this issue, improvements to the alignment wheel mechanism are needed to achieve more precise and efficient pipelaying operations. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a tower-based pipe-laying system. The main problem it solves is that existing pipes often fail to pass precisely through the centering wheel of the pipe-laying system, leading to abnormal wear and positioning deviations in the guiding mechanism. Furthermore, pipes that fail to pass through the centering wheel are prone to violent swaying under marine environmental loads, which not only reduces pipe-laying efficiency but also poses a serious threat to operational safety.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: A tower-laying pipe-laying system includes a laying tower mounted on the stern of a pipe-laying vessel and a traction device for pulling the pipe; it also includes a drive mechanism and two rotating support frames symmetrically arranged on the laying tower; an arc-shaped guide component is provided at one end of the laying tower near the stern, and an arc-shaped guide rail is provided at the other end away from the stern, the arc-shaped guide component and the arc-shaped guide rail being arranged in an arc along the same center; one end of each of the two rotating support frames slides into the arc-shaped guide component, and the other end slides into the arc-shaped guide rail, so that the rotating support frame can move in an arc along the arc-shaped guide component and the arc-shaped guide rail; the two rotating support frames are connected by a connecting component to a centering wheel mechanism for guiding the pipe to the traction device; wherein, the two rotating support frames are configured to move in an arc along the arc-shaped guide component and the arc-shaped guide rail under the drive of the drive mechanism, thereby driving the centering wheel mechanism to rotate to adjust its spatial orientation, so that the pipe is guided to the traction device through the centering wheel mechanism.

[0005] Furthermore, one end of the two rotating support frames has an arc-shaped extension end, which slides in conjunction with the arc-shaped guide assembly via a T-shaped guide plate.

[0006] Furthermore, the arc-shaped guide assembly includes two symmetrically arranged arc-shaped guide clamps, which are respectively clamped on both sides of the flange of the two T-shaped guide plates, and the upright plate of the T-shaped guide plate is fixedly connected to the outside of the arc-shaped extension end.

[0007] Furthermore, a movable connecting block is connected between the other ends of the two rotating support frames below. The two opposite ends of the movable connecting block are equipped with synchronous and co-directional drive motors via rotating connecting plates. The lower output shaft of each drive motor passes through the corresponding rotating connecting plate to be connected to the gear transmission. A rack that meshes with the gear is provided on the outer wall of the arc-shaped guide rail.

[0008] Furthermore, the end of the rotating connecting plate is provided with a guide roller, which rolls along the top of the arc-shaped guide rail.

[0009] Furthermore, the rotating support frame is triangular in shape.

[0010] Furthermore, a rotating arm is rotatably connected to the upper end of one of the arc-shaped extension ends. A first hydraulic cylinder and a connecting arm are connected to the rotating arm. The telescopic rod end of the first hydraulic cylinder is rotatably connected to the upper end of the rotating arm, and its cylinder body end is rotatably connected to the top of the corresponding rotating support frame. One end of the connecting arm is fixedly connected to the upper end of the rotating arm, and the other end is rotatably connected to the middle of the first straightener through a rotating shaft. The top end of the other end of the connecting arm is connected to the upper end of the first straightener through a second hydraulic cylinder. The first straightener is used to abut inward against the pipe passing through the centering wheel mechanism.

[0011] Furthermore, a connecting plate is connected between the lower ends of the two rotating support frames near the arc-shaped extension ends. Two sets of support slides and two sets of third hydraulic cylinders are symmetrically arranged on the connecting plate, and sliding frames are slidably arranged on both support slides. A second straightener is fixedly installed between the two sliding frames. One end of each of the two third hydraulic cylinders is symmetrically fixed to the connecting plate, and the other end is connected to the corresponding sliding frame for transmission, so as to drive the second straightener to move in the direction closer to / away from the stern. The second straightener is located below the first straightener and is used to abut against the pipe outward.

[0012] Furthermore, both the first straightener and the second straightener are elliptical in shape, and anti-detachment grooves are provided on the contact surfaces that contact the pipeline, with a driveable track provided in the anti-detachment grooves.

[0013] Furthermore, the connecting assembly includes a scissor mechanism, two fourth hydraulic cylinders, and two triangular connecting plates. The cylinder bodies of the two fourth hydraulic cylinders are rotatably connected to the tops of the two rotating support frames, and their telescopic ends are rotatably connected to the two open ends of the upper end of the scissor mechanism. The hinged ends of the lower end of the scissor mechanism are rotatably connected to the other ends of the two rotating support frames below the triangular connecting plates.

[0014] Furthermore, the centering wheel mechanism includes several support rods, several rollers, and two arc-shaped plates. The two arc-shaped plates are respectively fixedly connected to the inner sides of the two legs of the scissor mechanism by several support rods. The several rollers are rotatably connected between the two arc-shaped plates for guiding and supporting the pipeline.

[0015] The above technical solution has the following advantages or beneficial effects: In the tower pipe-laying system described in this invention, the rotating support frame can be driven to move in an arc shape along the arc-shaped guide rail and arc-shaped guide assembly by the drive mechanism, thereby driving the centering wheel mechanism to rotate synchronously and adjusting the orientation of the centering wheel mechanism. This allows the pipeline to smoothly pass through the centering wheel mechanism and enter the traction device, improving the existing technical problem that pipelines are difficult to accurately pass through the centering wheel of the pipe-laying system, which easily causes abnormal wear and positioning deviation of the guide mechanism. At the same time, pipelines that do not pass through the centering wheel are prone to violent swaying under the action of marine environmental loads, which not only reduces pipe-laying efficiency but also poses a serious threat to operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the tower pipe-laying system of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the upper part of the tower pipe-laying system of the present invention;

[0018] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0019] Figure 4 yes Figure 2 Enlarged view of a section at point B in the middle;

[0020] Figure 5 yes Figure 2 A structural diagram from another perspective;

[0021] Figure 6 yes Figure 5 Enlarged view of a section at point C;

[0022] Figure 7 This is an enlarged view of the second straightener in the tower pipe-laying system of the present invention;

[0023] Label Explanation: 1. Laying tower, 2. Rotating support frame, 21. Arc-shaped extension end, 3. Arc-shaped guide assembly, 31. Arc-shaped guide clamp, 4. Arc-shaped guide rail, 5. Connecting assembly, 51. Scissor mechanism, 52. Fourth hydraulic cylinder, 53. Triangular connecting plate, 6. Centering wheel mechanism, 61. Support rod, 62. Roller, 63. Arc plate, 7. T-shaped guide plate, 8. Moving connecting block, 9. Rotating connecting plate, 10. Drive motor, 20. Gear, 30. Rack, 40. Guide roller, 50. Rotating arm, 60. First hydraulic cylinder, 70. Connecting arm, 80. Rotating shaft, 90. First straightener, 100. Second hydraulic cylinder, 200. Connecting plate, 300. Support slide, 400. Third hydraulic cylinder, 500. Sliding frame, 600. Second straightener. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 this invention.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 7The first embodiment of the present invention provides a tower pipe-laying system, including a pipe-laying tower 1 mounted on the stern of a pipe-laying vessel and a traction device for pulling the pipe; it also includes a drive mechanism and two rotating support frames 2 symmetrically arranged on the pipe-laying tower 1. An arc-shaped guide component 3 is provided at one end of the pipe-laying tower 1 near the stern, and an arc-shaped guide rail 4 is provided at the other end away from the stern. The arc-shaped guide component 3 and the arc-shaped guide rail 4 are arranged in an arc along the same center, ensuring that the arc-shaped guide component 3 and the arc-shaped guide rail 4 have the same center, thus guaranteeing the stable rotation of the subsequent rotating support frames 2 and the uniform distribution of load. Simultaneously, one end of each of the two rotating support frames 2 is slidably engaged with the arc-shaped guide component 3, and the other end is slidably engaged with the arc-shaped guide rail 4, enabling the rotating support frame 2 to move in an arc along the arc-shaped guide component 3 and the arc-shaped guide rail 4. The two rotating support frames 2 are connected by a connecting assembly 5 to a centering wheel mechanism 6, which guides the pipeline into the traction device. This ensures that when the two rotating support frames 2 move in an arc along the arc-shaped guide rail 4 and the arc-shaped guide assembly 3, they simultaneously drive the centering wheel mechanism 6 to rotate. Specifically, the two rotating support frames 2 are configured to move in an arc along the arc-shaped guide assembly 3 and the arc-shaped guide rail 4 under the drive of the drive mechanism, thereby driving the centering wheel mechanism 6 to rotate and adjust its spatial orientation, guiding the pipeline into the traction device via the centering wheel mechanism 6. Specifically, by simply activating the drive mechanism to drive the rotating support frame 2 to move in an arc along the arc-shaped guide rail 4 and the arc-shaped guide component 3, the centering wheel mechanism 6 can be driven to rotate synchronously, thereby adjusting the orientation of the centering wheel mechanism 6. This allows the pipeline to smoothly pass through the centering wheel mechanism 6 and enter the traction device. This improves upon the existing technical problem that pipelines are difficult to accurately pass through the centering wheel of the pipe-laying system, which easily causes abnormal wear and positioning deviations in the guide mechanism. At the same time, pipelines that do not pass through the centering wheel are prone to violent swaying under marine environmental loads, which not only reduces pipe-laying efficiency but also poses a serious threat to operational safety.

[0027] Please refer to the appendix. Figure 2 To be continued Figure 3 In one preferred embodiment, one end of each of the two rotating support frames 2 has an arc-shaped extension end 21, and the two arc-shaped extension ends 21 are slidably engaged with the arc-shaped guide assembly 3 via a T-shaped guide plate 7. The T-shaped guide plate 7 provides a basis for the reliable sliding of the arc-shaped extension end 21 relative to the arc-shaped guide assembly 3.

[0028] Furthermore, the arc-shaped guide assembly 3 includes two symmetrically arranged arc-shaped guide clamps 31 (i.e., the two arc-shaped guide clamps 31 form the arc-shaped guide assembly 3), with the two arc-shaped guide clamps 31 respectively clamping the flanges of the two T-shaped guide plates 7; and the uprights of the two T-shaped guide plates 7 are respectively fixedly connected to the lower ends of the outer sides of the two arc-shaped extension ends 21. This design not only accurately guides the T-shaped guide plates 7, but also restricts the degrees of freedom of the T-shaped guide plates 7, so that the T-shaped guide plates 7 can only move along the preset arc trajectory, thereby preventing the rotating support frame 2 from making unexpected movements in any other direction (such as swaying left and right, jumping up and down, or twisting).

[0029] Please refer to the appendix. Figure 2 and attached Figure 4 In one preferred embodiment, a movable connecting block 8 is fixedly connected between the other ends of the two rotating support frames 2. Both ends of the movable connecting block 8 are equipped with synchronously operating drive motors 10 via rotating connecting plates 9. The lower output shaft of each drive motor 10 passes through the corresponding rotating connecting plate 9 to be connected to a gear 20. A rack 30 meshing with the gear 20 is provided on the outer wall of the arc-shaped guide rail 4 (i.e., the drive motor 10, gear 20, rack 30, and external controller together constitute the aforementioned drive mechanism). Specifically, when the user controls multiple drive motors 10 to start synchronously via the controller, the corresponding gear 20 will mesh synchronously on the rack 30, thereby driving the entire rotating support frame 2 to move in an arc along the arc-shaped guide rail 4 and the arc-shaped guide clamp 31, ultimately adjusting the position of the centering wheel mechanism 6 so that the pipeline can smoothly enter the traction device through the centering wheel mechanism 6.

[0030] Furthermore, the end of the rotating connecting plate 9 is provided with a guide roller 40, which rolls along the top of the arc-shaped guide rail 4. This allows the rotating support frame 2 to slide smoothly along the arc-shaped guide rail 4 while strictly constraining its movement trajectory and effectively withstanding forces in various directions, ensuring the stability, accuracy, and safety of the equipment operation.

[0031] Preferably, the rotating support frame 2 is triangular in shape, which allows the rotating support frame 2 to have high structural stability while also saving materials.

[0032] Please refer to the appendix. Figure 2 Appendix Figure 5 To be continued Figure 6In one preferred embodiment, a rotating arm 50 is rotatably connected to the upper end of one of the arc-shaped extension ends 21. A first hydraulic cylinder 60 and a connecting arm 70 are connected to the rotating arm 50. The telescopic rod end of the first hydraulic cylinder 60 is rotatably connected to the upper end of the rotating arm 50, and its cylinder body end is rotatably connected to the top of the corresponding rotating support frame 2. When the telescopic rod of the first hydraulic cylinder 60 extends or retracts, it drives the rotating arm 50 to rotate accordingly, thus paving the way for the subsequent contact between the first straightener 90 and the pipe. One end of the connecting arm 70 is fixedly connected to the upper end of the rotating arm 50, and the other end is rotatably connected to the middle of the first straightener 90 through a rotating shaft 80. The top end of the other end of the connecting arm 70 is connected to the upper end of the first straightener 90 through a second hydraulic cylinder 100. Since the pipe is initially wound on a drum, this will cause the pipe to bulge outward. Therefore, the first straightener 90 is mainly used to abut against the pipe passing through the centering wheel mechanism 6 to correct the bulge of the pipe. Specifically, when the pipeline enters the working area of ​​the first straightener 90 after passing through the centering wheel mechanism 6, the first hydraulic cylinder 60 and the second hydraulic cylinder 100 must be activated simultaneously. Through the coordinated action of these two hydraulic cylinders, the swing angle of the connecting arm 70 and the spatial orientation of the first straightener 90 are precisely adjusted, ensuring that its working end face can accurately and stably conform to the outer wall of the pipeline. This adjustment ensures that the first straightener 90 can apply uniform and perpendicular inward pressure to the specific convex part of the pipeline at the optimal angle, thus laying a solid foundation for subsequent efficient and precise straightening operations.

[0033] Please refer to the appendix. Figure 2 Appendix Figure 5 To be continued Figure 7In one preferred embodiment, a connecting plate 200 is connected between the lower ends of the two rotating support frames 2 near the arc-shaped extension end 21. Two sets of support slides 300 and two sets of third hydraulic cylinders 400 are symmetrically arranged on the connecting plate 200. Sliding frames 500 are slidably arranged on each of the two support slides 300, and a second straightener 600 is fixedly installed between the two sliding frames 500. One end of each of the two third hydraulic cylinders 400 is symmetrically fixed to the connecting plate 200, and the other end is connected to the corresponding sliding frame 500 for transmission, thereby driving the second straightener 600 to move towards / away from the stern. The second straightener 600 is located below the first straightener 90 and is used to abut against the pipe outwards, and both straighteners always remain in contact with the pipe. Specifically, during pipe laying, the pipe passes sequentially through the centering wheel mechanism 6, the first straightener 90, and the second straightener 600, ultimately reaching the traction device. If the pressure applied by the first straightener 90 is too high, it may cause the pipe to become concave. Therefore, the second straightener 600 is used to correct this concavity and prevent secondary deformation. Furthermore, as shown in the overall drawings, the arc-shaped extension end 21 below the rotating support frame 2 and the moving connecting block 8 form two concentric arcs, with their centers close to the side where the arc-shaped extension end 21 is located. This ensures that the pipe's axis remains stably aligned and passes through this common center as it passes through the centering wheel mechanism 6, the first straightener 90, and the second straightener 600, thus smoothly entering the traction device. The advantage of this design is that, through the geometric constraints of the concentric circle trajectory, it achieves natural alignment and seamless connection of the pipeline from straightening and centering to traction transmission. This not only greatly reduces the risk of jamming, deviation or additional stress in the pipeline during turning and transportation, ensuring the smoothness and stability of the entire process, but also significantly improves the reliability and operational accuracy of the equipment by simplifying the mechanism.

[0034] Preferably, both the first straightener 90 and the second straightener 600 are elliptical in shape, and anti-slip grooves are provided on the contact surfaces that contact the pipeline to effectively prevent the pipeline from accidentally sliding or jumping out of the straightening station due to other forces. At the same time, the anti-slip grooves are equipped with driveable tracks, which, in conjunction with the pipeline's conveying path, allow the pipeline to enter the traction device more effectively and prevent the pipeline from getting stuck during conveying.

[0035] Please refer to the appendix. Figure 2In one preferred embodiment, the connecting assembly 5 includes a scissor mechanism 51, two fourth hydraulic cylinders 52, and two triangular connecting plates 53. The cylinder ends of the two fourth hydraulic cylinders 52 are rotatably connected to the top ends of the two rotating support frames 2, and their telescopic ends are rotatably connected to the two open ends of the upper end of the scissor mechanism 51. The hinged ends of the lower end of the scissor mechanism 51 are rotatably connected to the other end of the lower part of the two rotating support frames 2 through the triangular connecting plates 53, so that the present invention can adapt to pipes with larger diameters. Specifically, when the pipe diameter increases slightly, the axis of the pipe deviates outward relative to the aforementioned center position. In order to ensure that the pipe axis can eventually pass through the center, the two fourth hydraulic cylinders 52 should be activated simultaneously, so that their telescopic rods extend and drive the scissor mechanism 51 to rotate away from the stern, thereby accurately driving the centering wheel mechanism 6 to produce a corresponding displacement, so that the opening between the centering wheel mechanism 6 and the first straightener 90 increases synchronously. This design not only dynamically expands the equipment's adaptability to pipes of different diameters, but also, through proactive closed-loop adjustment, fundamentally ensures that, despite different pipe sizes, the axis of the pipes is always precisely aligned and passes through the center of the circle during transmission, guaranteeing continuous stability and high reliability of process alignment.

[0036] Please refer to the appendix. Figure 1 To be continued Figure 2 In one preferred embodiment, the centering wheel mechanism 6 includes several support rods 61, several rollers 62, and two arc-shaped plates 63. The two arc-shaped plates 63 are respectively fixedly connected to the inner sides of the two legs of the scissor mechanism 51 by several support rods 61. The several rollers 62 are evenly and rotatably connected between the two arc-shaped plates 63 to guide and support the pipeline, thereby improving the stability and efficiency of the pipeline in the process of conveying it to the traction device.

[0037] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

Claims

1. A tower-laying pipe-laying system, comprising a laying tower (1) mounted on the stern of a pipe-laying vessel and a traction device for pulling the pipe; characterized in that, It also includes a drive mechanism and two rotating support frames (2) symmetrically arranged on the laying tower (1); the laying tower (1) is provided with an arc-shaped guide assembly (3) at one end near the stern and an arc-shaped guide rail (4) at the other end away from the stern, the arc-shaped guide assembly (3) and the arc-shaped guide rail (4) are arranged in an arc shape along the same center; one end of the two rotating support frames (2) is slidably engaged with the arc-shaped guide assembly (3), and the other end is slidably engaged with the arc-shaped guide rail (4), so that the rotating support frame (2) can move along the arc-shaped guide rail (4). The arc-shaped guide assembly (3) and the arc-shaped guide rail (4) move in an arc shape; the two rotating support frames (2) are connected by a connecting assembly (5) to a centering wheel mechanism (6) to guide the pipe to the traction device; wherein, the two rotating support frames (2) are configured to move in an arc shape along the arc-shaped guide assembly (3) and the arc-shaped guide rail (4) under the drive of the drive mechanism, thereby driving the centering wheel mechanism (6) to rotate to adjust its spatial orientation, so that the pipe is guided to the traction device through the centering wheel mechanism (6).

2. The tower pipe-laying system according to claim 1, characterized in that: One end of the two rotating support frames (2) has an arc-shaped extension end (21), which slides with the arc-shaped guide assembly (3) through a T-shaped guide plate (7).

3. The tower pipe-laying system according to claim 2, characterized in that: The arc-shaped guide assembly (3) includes two symmetrically arranged arc-shaped guide clamps (31), which are respectively clamped on both sides of the flange of the two T-shaped guide plates (7), and the upright plate of the T-shaped guide plate (7) is fixedly connected to the outside of the arc-shaped extension end (21).

4. The tower pipe-laying system according to claim 1, characterized in that: A movable connecting block (8) is connected between the other ends of the two rotating support frames (2). The two opposite ends of the movable connecting block (8) are equipped with synchronous and co-directional drive motors (10) through rotating connecting plates (9). The lower output shaft of each drive motor (10) passes through the corresponding rotating connecting plate (9) to be connected to the gear (20) for transmission. The outer wall of the arc-shaped guide rail (4) is provided with a rack (30) that meshes with the gear (20).

5. The tower pipe-laying system according to claim 4, characterized in that: The ends of the two rotating connecting plates (9) are provided with guide rollers (40), which roll along the top of the arc-shaped guide rail (4).

6. The tower pipe-laying system according to claim 1, characterized in that: The rotating support frame (2) is triangular in shape.

7. The tower pipe-laying system according to claim 6, characterized in that: One of the arc-shaped extension ends (21) is rotatably connected to a rotating arm (50). A first hydraulic cylinder (60) and a connecting arm (70) are connected to the rotating arm (50). The telescopic rod end of the first hydraulic cylinder (60) is rotatably connected to the upper end of the rotating arm (50), and its cylinder body end is rotatably connected to the top of the corresponding rotating support frame (2). One end of the connecting arm (70) is fixedly connected to the upper end of the rotating arm (50), and the other end is rotatably connected to the middle of the first straightener (90) through a rotating shaft (80). The top end of the other end of the connecting arm (70) is connected to the upper end of the first straightener (90) through a second hydraulic cylinder (100). The first straightener (90) is used to abut inward against the pipe passing through the centering wheel mechanism (6).

8. The tower pipe-laying system according to claim 7, characterized in that: A connecting plate (200) is connected between the lower ends of the two rotating support frames (2) near the arc-shaped extension end (21). Two sets of support slides (300) and two sets of third hydraulic cylinders (400) are symmetrically arranged on the connecting plate (200). Sliding frames (500) are slidably arranged on both support slides (300). A second straightener (600) is fixedly installed between the two sliding frames (500). One end of each of the two third hydraulic cylinders (400) is fixed on the connecting plate (200), and the other end is connected to the corresponding sliding frame (500) for transmission, so as to drive the second straightener (600) to move towards / away from the stern. The second straightener (600) is located below the first straightener (90) and is used to abut against the pipe outward.

9. The tower pipe-laying system according to claim 8, characterized in that: The first straightener (90) and the second straightener (600) are both elliptical in shape, and anti-detachment grooves are provided on the contact surfaces that contact the pipe. The anti-detachment grooves are provided with driveable tracks.

10. The tower pipe-laying system according to claim 6, characterized in that: The connecting assembly (5) includes a scissor mechanism (51), two fourth hydraulic cylinders (52) and two triangular connecting plates (53). The cylinder ends of the two fourth hydraulic cylinders (52) are rotatably connected to the top of the two rotating support frames (2), and their telescopic ends are rotatably connected to the two open ends of the upper end of the scissor mechanism (51). The hinged end of the lower end of the scissor mechanism (51) is rotatably connected to the other end below the two rotating support frames (2) through the triangular connecting plates (53).

11. The tower pipe-laying system according to claim 10, characterized in that: The centering wheel mechanism (6) includes several support rods (61), several rollers (62) and two arc plates (63). The two arc plates (63) are fixedly connected to the inner sides of the two legs of the scissor mechanism (51) by several support rods (61); the several rollers (62) are rotatably connected between the two arc plates (63) for guiding and supporting the pipeline.

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