Subsea pipeline off-bottom towing guide positioning device

Abstract

The utility model discloses a kind of seabed pipeline off bottom tow guiding positioning device, belong to seabed pipeline tow field, this tow guiding positioning device includes crossbeam, first rope is installed on the crossbeam, the outer wall of first rope is provided with buoy, fixed structure and protective structure are installed on the crossbeam, the fixed structure includes two groups of fixed plate symmetrically installed in the bottom of crossbeam;By setting fixed structure, pipeline is placed on V-shaped plate, in cooperation with the pressing plate on the upper side of pipeline outer wall compaction, different diameter pipeline can be clamped and fixed function, avoid the existing seabed pipeline off bottom tow guiding positioning device cannot be fixed and clamped to different diameter pipeline, so that seabed pipeline off bottom tow guiding positioning device can only single size pipeline tow guiding effect problem, to be able to improve the use flexibility of tow guiding positioning device.

Description

Technical Field

[0001] This utility model relates to the field of submarine pipeline towing technology, specifically a submarine pipeline off-bottom towing guidance and positioning device. Background Technology

[0002] In marine engineering, subsea pipelines, such as ocean release pipes, need to be installed. Existing subsea pipeline laying techniques mainly include pipelaying vessel methods, hoisting methods, and bottom-towing methods. The bottom-towing method involves welding pipe sections of a certain length on land and then towing them into the sea via a slipway, pulling them along the seabed. Because the pipeline is close to the seabed, the bottom-towing method has a certain degree of adaptability to the effects of wind, waves, and tides. Furthermore, operations can be interrupted if necessary, resulting in relatively small losses in both time and money. Therefore, it is widely used in near-shore, beach, and riverbed pipeline laying.

[0003] Existing submarine pipeline off-bottom towing guidance and positioning devices cannot fix and clamp pipelines of different diameters, which means that the devices can only guide and tow pipelines of a single size, resulting in poor flexibility of use.

[0004] Therefore, this utility model provides a guide and positioning device for off-bottom towing of submarine pipelines to solve the above problems. Utility Model Content

[0005] This utility model provides a submarine pipeline off-bottom towing guidance and positioning device, which aims to solve the problems mentioned in the background art, such as the inability of existing submarine pipeline off-bottom towing guidance and positioning devices to fix and clamp pipelines of different diameters, resulting in the submarine pipeline off-bottom towing guidance and positioning device only being able to tow and guide pipelines of a single size, and poor flexibility of use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a guide and positioning device for off-bottom towing of a submarine pipeline, comprising a crossbeam, a first rope installed on the crossbeam, a float provided on the outer wall of the first rope, and a fixing structure and a protective structure installed on the crossbeam; The fixing structure includes two sets of fixing plates symmetrically installed at the bottom of the crossbeam. A frame is installed at the lower end of each fixing plate. A V-shaped plate and a threaded cylinder are installed inside the frame's inner cavity. A screw is threaded onto the threaded cylinder. A pressure plate is rotatably installed at the lower end of the screw, located within the inner cavity of the frame. Limiting plates are symmetrically installed at both ends of the pressure plate. By setting up this fixing structure, the pipe is placed on the V-shaped plate, and the pressure plate presses against the upper outer wall of the pipe, enabling clamping and fixing of pipes of different diameters. This avoids the problem that existing submarine pipeline towing and guiding devices cannot clamp and fix pipes of different diameters, limiting their use to single-size pipes. This improves the flexibility of the towing and guiding device.

[0007] Preferably, the protective structure includes a first mounting column installed at the front end of the crossbeam and a second mounting column installed at the rear end of the crossbeam. The lower outer walls of the first and second mounting columns are symmetrically equipped with support rods. The lower end of the support rod is provided with a first roller. The front outer wall of the first mounting column is symmetrically equipped with diagonal rods. The other end of the diagonal rod is provided with a support cylinder. The inner wall of the support cylinder is slidably equipped with a telescopic rod and a spring sleeved on the outer wall of the support cylinder. The other end of the telescopic rod is equipped with a second roller.

[0008] Preferably, a second rope is installed at the bottom of the frame, a counterweight is provided at the lower end of the second rope, a front drag ring is installed on the outer wall of the first mounting column, and a rear drag ring is installed on the outer wall of the second mounting column.

[0009] Preferably, the fixing structure is provided in multiple sets and evenly distributed on the crossbeam. The crossbeam has through holes corresponding to the screw. The upper end of the screw passes through the through hole and is equipped with a handwheel.

[0010] Preferably, the pressure plate has stepped holes, and a turntable is installed at the lower end of the screw. The pressure plate is rotatably connected to the turntable through the stepped holes.

[0011] Preferably, the inner cavity of the frame is symmetrically provided with sliding grooves, the frame is slidably connected to the limiting plate through the sliding grooves, and rubber pads are installed on the pressure plate and the V-shaped plate.

[0012] Preferably, the upper side of the support cylinder is connected to the upper end of the spring, the lower end of the spring is connected to the second roller, and the upper end of the telescopic rod is equipped with an anti-detachment disc that is slidably connected to the support cylinder.

[0013] Beneficial effects: By setting up a fixed structure and using a combination of a frame, V-shaped plate, screw, and pressure plate, the pipe is placed on the V-shaped plate, and the pressure plate presses against the upper outer wall of the pipe. This allows for the clamping and fixing of pipes of different diameters, avoiding the problem that existing submarine pipeline off-bottom towing guidance and positioning devices cannot clamp and fix pipes of different diameters, thus limiting their use to towing and guiding to pipes of a single size. This improves the flexibility of the towing guidance and positioning device. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a guide and positioning device for off-bottom towing of a subsea pipeline; Figure 2 This is a partial structural schematic diagram of a guide and positioning device for off-bottom towing of a subsea pipeline; Figure 3 A cross-sectional and disassembled schematic diagram of the fixed structure of a guide and positioning device for off-bottom towing of a subsea pipeline; Figure 4 This is a partial schematic diagram of the protective structure of a guide and positioning device for off-bottom towing of a submarine pipeline.

[0015] In the diagram: 1. Crossbeam; 101. Through hole; 2. First rope; 3. Float; 4. Fixing structure; 41. Fixing plate; 42. Enclosure; 421. Slide groove; 43. V-shaped plate; 44. Threaded cylinder; 45. Screw; 46. Pressure plate; 461. Stepped hole; 462. Turntable; 47. Limiting plate; 48. Handwheel; 5. Protective structure; 51. First mounting post; 52. Second mounting post; 53. Support rod; 54. First roller; 55. Diagonal bar; 56. Support cylinder; 57. Telescopic rod; 571. Anti-detachment disc; 58. Spring; 59. Second roller; 6. Second rope; 7. Counterweight; 8. Front towing ring; 9. Rear towing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0017] This embodiment provides a guiding and positioning device for off-bottom towing of subsea pipelines, such as... Figure 1-4 As shown, the towing guide positioning device includes a crossbeam 1, a first rope 2 installed on the crossbeam 1, a float 3 provided on the outer wall of the first rope 2, and a fixing structure 4 and a protective structure 5 installed on the crossbeam 1. The fixing structure 4 includes two sets of fixing plates 41 symmetrically installed at the bottom of the crossbeam 1. A frame 42 is installed at the lower end of the two sets of fixing plates 41. A V-shaped plate 43 is installed in the inner cavity of the frame 42 and a threaded cylinder 44 is set on the end face of the frame 42. A screw 45 is installed on the threaded cylinder 44 by threads. A pressure plate 46 is rotatably installed at the lower end of the screw 45 and in the inner cavity of the frame 42. Limiting plates 47 are symmetrically installed at the left and right ends of the pressure plate 46.

[0018] In use, pipes of different diameters are sequentially inserted from the rear fixed structure 4 into the front fixed structure 4, and the lower outer wall of the pipe is placed on multiple sets of V-shaped plates 43. Multiple sets of handwheels 48 are rotated in sequence, and the handwheels 48 rotate the screw 45. Due to the sliding cooperation between the limiting plate 47 and the sliding groove 421, the screw 45 drives the pressure plate 46 to move downward and gradually contact the outer wall of the pipe, and apply a certain pressure to clamp and fix the pipe. This achieves the function of clamping and fixing pipes of different diameters, avoiding the problem that the existing submarine pipeline off-bottom towing guide and positioning device cannot fix and clamp pipes of different diameters, and that the submarine pipeline off-bottom towing guide and positioning device can only perform towing and guiding functions for pipes of a single size. This improves the flexibility of the towing guide and positioning device. By setting up multiple sets of buoys 3, which are spaced apart along the length of the pipeline, upward buoyancy is generated to lift the pipeline off the seabed, preventing frictional wear. The buoys 3 eliminate the risk of pipeline scraping caused by seabed topography and prevent the pipeline from sinking and deforming due to its own weight or external pressure. In this embodiment, a second rope 6 is installed at the bottom of the frame 42, and a counterweight 7 is provided at the lower end of the second rope 6. A front drag ring 8 is installed on the outer wall of the first mounting post 51, and a rear drag ring 9 is installed on the outer wall of the second mounting post 52. Multiple sets of fixing structures 4 are provided and evenly distributed on the crossbeam 1. A through hole 101 is opened on the crossbeam 1 corresponding to the screw 45. The upper end of the screw 45 passes through the through hole 101 and is equipped with a handwheel 48. The system incorporates a front tow ring 8 and a rear tow ring 9, which, in conjunction with the towing rope, facilitate the connection between the front tow ring 8 and the front tugboat, and the rear tow ring 9 and the stern auxiliary tugboat, enabling the towing of the pipeline. Multiple sets of counterweights 7, symmetrically distributed below the pipeline, counteract the excessive upward movement of the buoy 3 through gravity, precisely controlling the pipeline at a predetermined suspension depth. In this embodiment, a stepped hole 461 is provided on the pressure plate 46, and a turntable 462 is installed at the lower end of the screw 45. The pressure plate 46 is rotatably connected to the turntable 462 through the stepped hole 461. The inner cavity of the frame 42 is symmetrically provided with sliding grooves 421. The frame 42 is slidably connected to the limiting plate 47 through the sliding grooves 421. Rubber pads are installed on the pressure plate 46 and the V-shaped plate 43. Rubber pads are installed on the pressure plate 46 and the V-shaped plate 43. The pressure plate 46 and the V-shaped plate 43 are flexibly connected to the outer wall of the pipe through the rubber pads, so as to avoid damage to the pipe during the clamping and fixing of the pipe. Example 2

[0019] Unlike Embodiment 1, the protective structure 5 includes a first mounting column 51 installed at the front end of the crossbeam 1 and a second mounting column 52 installed at the rear end of the crossbeam 1. The lower outer walls of the first mounting column 51 and the second mounting column 52 are symmetrically equipped with support rods 53. The lower end of the support rod 53 is provided with a first roller 54. The front outer wall of the first mounting column 51 is symmetrically equipped with diagonal rods 55. The other end of the diagonal rod 55 is provided with a support cylinder 56. The inner wall of the support cylinder 56 is slidably equipped with a telescopic rod 57 and a spring 58 sleeved on the outer wall of the support cylinder 56. The other end of the telescopic rod 57 is equipped with a second roller 59. In use, when the towing guide and positioning device moves along the seabed and encounters a slope, the lack of protective devices causes the towed pipeline to collide with the slope, resulting in pipeline damage. With the protective structure 5 in place, when the towing vessel pulls the guide and positioning device forward via the front towing ring 8 and encounters a seabed slope, the two sets of second rollers 59 on the front side will first contact and collide with the slope. With the combined action of the support cylinder 56, the telescopic rod 57, and the spring 58, the spring 58 provides a certain degree of shock absorption against the impact force between the second rollers 59 and the slope. This protects the towing guidance and positioning device and the pipeline. Under the pulling force of the towing ring 8, the towing ring 8 moves the crossbeam 1. The crossbeam 1 moves by driving the first mounting column 51. The first mounting column 51 drives the second roller 59 to move and climb the hillside through the transmission action of the diagonal rod 55, support cylinder 56, telescopic rod 57, etc., and cooperates with the four sets of first rollers 54 to contact the hillside and cross the hillside to realize the smooth towing of the pipeline, thus making the towing guidance and positioning device more effective. In this embodiment, the upper side of the support cylinder 56 is connected to the upper end of the spring 58, the lower end of the spring 58 is connected to the second roller 59, and the upper end of the telescopic rod 57 is equipped with an anti-detachment disc 571 that is slidably connected to the support cylinder 56.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A guide and positioning device for off-bottom towing of a subsea pipeline, comprising a crossbeam (1), characterized in that: A first rope (2) is installed on the crossbeam (1), and a float (3) is provided on the outer wall of the first rope (2). A fixing structure (4) and a protective structure (5) are installed on the crossbeam (1). The fixed structure (4) includes two sets of fixed plates (41) symmetrically installed at the bottom of the crossbeam (1). The lower ends of the two sets of fixed plates (41) are equipped with a frame (42). The inner cavity of the frame (42) is equipped with a V-shaped plate (43) and a threaded cylinder (44) set on the end face of the frame (42). The threaded cylinder (44) is equipped with a screw (45) by thread. The lower end of the screw (45) and located in the inner cavity of the frame (42) is rotatably equipped with a pressure plate (46). The left and right ends of the pressure plate (46) are symmetrically equipped with limit plates (47).

2. The subsea pipeline off-bottom towing guidance and positioning device according to claim 1, characterized in that: The protective structure (5) includes a first mounting column (51) installed at the front end of the crossbeam (1) and a second mounting column (52) installed at the rear end of the crossbeam (1). Support rods (53) are symmetrically installed on the lower side of the outer wall of the first mounting column (51) and the second mounting column (52). A first roller (54) is provided at the lower end of the support rod (53). A diagonal rod (55) is symmetrically installed on the front side of the outer wall of the first mounting column (51). A support cylinder (56) is provided at the other end of the diagonal rod (55). A telescopic rod (57) and a spring (58) sleeved on the outer wall of the support cylinder (56) are slidably installed on the inner wall of the support cylinder (56). A second roller (59) is installed at the other end of the telescopic rod (57).

3. The subsea pipeline off-bottom towing guidance and positioning device according to claim 2, characterized in that: The bottom of the enclosure (42) is equipped with a second rope (6), and the lower end of the second rope (6) is provided with a counterweight (7). The outer wall of the first mounting post (51) is equipped with a front drag ring (8), and the outer wall of the second mounting post (52) is equipped with a rear drag ring (9).

4. The subsea pipeline off-bottom towing guidance and positioning device according to claim 1, characterized in that: The fixing structure (4) is provided in multiple sets and is evenly distributed on the crossbeam (1). The crossbeam (1) is provided with a through hole (101) corresponding to the screw (45). The upper end of the screw (45) passes through the through hole (101) and is equipped with a handwheel (48).

5. The subsea pipeline off-bottom towing guidance and positioning device according to claim 1, characterized in that: The pressure plate (46) has a stepped hole (461), and a turntable (462) is installed at the lower end of the screw (45). The pressure plate (46) is rotatably connected to the turntable (462) through the stepped hole (461).

6. The subsea pipeline off-bottom towing guidance and positioning device according to claim 1, characterized in that: The inner cavity of the frame (42) is symmetrically provided with sliding grooves (421), and the frame (42) is slidably connected to the limiting plate (47) through the sliding grooves (421). Rubber pads are installed on the pressure plate (46) and the V-shaped plate (43).

7. The subsea pipeline off-bottom towing guidance and positioning device according to claim 2, characterized in that: The upper side of the support cylinder (56) is connected to the upper end of the spring (58), the lower end of the spring (58) is connected to the second roller (59), and the upper end of the telescopic rod (57) is equipped with an anti-detachment disc (571) that is slidably connected to the support cylinder (56).

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