A connecting structure device of a top-pull tube

Abstract

The utility model provides a kind of connecting structure device of top pull pipe, it is related to double-layer sea pipe laying front prefabrication technical field, including main body connecting pipe, front edge top pipe component and rear edge pull pipe component, the front edge top pipe component is fixedly arranged in the one side end of main body connecting pipe, the rear edge pull pipe component is fixedly arranged in the other side end of main body connecting pipe, front end clamping groove is provided on the front edge top pipe component, and there is front soft rubber pad in front end clamping groove, rear end clamping groove is provided on the rear edge pull pipe component, and rear soft rubber pad is provided in rear end clamping groove.The utility model structure is light, and it is labor-saving and time-saving when operating personnel operates, the device is improved around design, process improvement, solve the shortcomings of existing pull pipe.The connecting structure of top pull pipe, including front edge top pipe part and rear edge pull pipe part, in work, make front edge part top inside pipe, rear edge pull pipe part pull outside pipe, make outside pipe to be combined and folded.

Description

Technical Field

[0001] This utility model relates to the field of prefabrication technology before laying double-layer subsea pipelines, and in particular to a connection structure device for top-pull pipes. Background Technology

[0002] In the laying of subsea pipelines, pipelines transporting special media require relatively high temperatures during operation. In areas with low seabed temperatures, double-layer subsea pipelines are necessary to increase the internal temperature while protecting the outer surface from seawater corrosion. A double-layer subsea pipeline consists of an inner pipe, an insulation layer, an outer pipe, and an outer anti-corrosion layer. During laying, numerous double-layer pipes are assembled, welded, inspected, and subjected to anti-corrosion treatment, among other procedures, before being laid into the sea.

[0003] For ease of storage and transportation, pipelines are typically manufactured to a length of around 12 meters. During installation, to improve efficiency and reduce offshore construction time, subsea pipelines are usually prefabricated to a length of 24 meters before on-site installation. With both the inner and outer pipes of the same length, the pipe ends cannot be exposed for the next step: grinding and rust removal of the pipe ends, and J-beveling. To ensure the smooth progress of the next process, a winch is used to pull the inner pipe and stretch the outer pipe.

[0004] In the prefabrication and docking of double-layer subsea pipelines, 400mm of the inner pipe needs to be exposed at the assembly end to facilitate grinding and rust removal, submerged arc welding, and post-weld inspection during the initial prefabrication process. Since the exposed length of the inner pipe varies during the factory-prepared corrosion protection process, it hinders the next step. Therefore, before assembly, a hand winch is used to secure the outer pipe, and a winch connected with wire ropes, shackles, and hooks is used to hold the pipe end. The winch's pulling force is then used to pull the inner pipe out approximately 400mm, allowing it to proceed smoothly to the next step.

[0005] The initial method involved cutting a simple hook from a sheet of material. However, since the hook head was attached to the bevel end of the pipe opening directly, the force was uneven and the stability was low under the pulling force of the winch. This failed to achieve the function of pulling the inner pipe to pull the outer pipe, and it easily squeezed the bevel end of the pipe opening into a concave notch. During assembly welding, the notch seriously affected the welding quality.

[0006] Therefore, in order to ensure the integrity of the pipe bevel, the connection structure device for the top-pull pipe disclosed in this utility model plays the most important role in protecting the pipe opening. Utility Model Content

[0007] The main technical problem to be solved by this utility model is that the bevel at the pipe end is easily squeezed into a concave notch when the pipe is pulled. In order to overcome the above-mentioned defects of the prior art, a connecting structure device for pulling pipe is provided.

[0008] The technical solution adopted by this utility model to solve its technical problem is: A connecting structure device for a top-pull pipe includes a main connecting pipe, a front top-pull pipe component, and a rear pull-pipe component. The front top-pull pipe component is fixedly disposed at one end of the main connecting pipe, and the rear pull-pipe component is fixedly disposed at the other end of the main connecting pipe. The front top-pull pipe component is provided with a front end slot, and a front soft rubber pad is disposed in the front end slot. The rear pull-pipe component is provided with a rear end slot, and a rear soft rubber pad is disposed in the rear end slot.

[0009] Furthermore, the front top tube component includes a front top plate, which is fixedly installed on one side end of the main connecting tube. A front upper limit plate and a lower limit plate are fixedly installed on the side of the front top plate, and a front end slot is provided between the front upper limit plate and the lower limit plate.

[0010] Furthermore, a front soft rubber pad is provided on the side of the front top plate, and the front soft rubber pad is located in the front end slot.

[0011] Furthermore, a lifting point is fixedly provided on the upper part of the front upper limit plate.

[0012] Furthermore, the rear pull tube component includes a rear top pull plate and a rear lower limit plate fixedly disposed at the bottom of the rear top pull plate.

[0013] Furthermore, the rear top pull plate is fixedly installed at the other end of the main connecting pipe, and the rear lower limit plate has a rear end slot between it and the main connecting pipe.

[0014] Furthermore, the height of the rear end slot is greater than the wall thickness of the outer tube.

[0015] Furthermore, a soft rubber pad is provided on the side of the rear top pull plate, and the soft rubber pad is located in the rear end slot.

[0016] Furthermore, reinforcing ribs are fixedly installed at both the front and rear ends of the upper part of the main connecting pipe.

[0017] Furthermore, a safety handrail is provided on the side of the rear top panel.

[0018] The beneficial effects of this utility model are: This utility model designs a simple and lightweight top-pull pipe connection structure, saving operators time and effort. The device closely follows design and process improvements, using technological innovation to enhance economic value and overcome the shortcomings of existing pipe-pulling systems. The top-pull pipe connection structure includes a front top-pull section and a rear pull-pull section. During operation, the front section pushes against the inner pipe, while the rear pull-pull section pulls the outer pipe, ensuring the outer pipe is properly aligned and the inner pipe is exposed to the required 400mm, meeting the requirements of the next process. Front and rear soft rubber pads protect the bevel surface from damage. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the first overall structure of the present invention; Figure 2 This is a schematic diagram of the second overall structure of the present invention; Figure 3 This is a cross-sectional view of the present invention in use; Figure 4 This is a cross-sectional view of the outer tube of this utility model after it has been closed.

[0021] Explanation of the labels in the diagram: 1. Lifting point; 2. Lower limit plate; 3. Front upper limit plate; 4. Front soft rubber pad; 5. Front top plate; 7. Main connecting pipe; 8. Rear lower limit plate; 9. Reinforcing rib plate; 10. Rear soft rubber pad; 11. Rear top pull plate; 12. Safety handrail; 13. Outer pipe; 14. Inner pipe; 15. Exposed end of inner pipe; 16. Steel wire rope; 17. Weld line of outer pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0023] In submarine pipeline laying, most pipelines require maintaining a certain internal temperature during transport. Therefore, an outer layer of pipe is added to protect the inner pipe from rapid temperature drops and seawater corrosion; this is called a double-layer submarine pipeline. A double-layer submarine pipeline consists of an inner pipe, an insulation layer, an outer pipe, anti-corrosion coating, and a cement coating. During laying, single double-layer pipes are assembled, welded, inspected, and subjected to anti-corrosion treatment before being laid in the sea. For ease of storage and transportation, double-layer submarine pipelines are typically around 12 meters long. However, to improve efficiency and reduce offshore construction time, they are usually prefabricated to a length of 24 meters before on-site laying. The pipe ends are ground, rust removed, and beveled, requiring a certain length of the inner pipe to be exposed. If the exposed lengths of the inner and outer pipes are different, further work cannot proceed at either end. In such cases, a winch is used to move the inner pipe back and forth to expose the exposed length.

[0024] This utility model is mainly used in the prefabrication and assembly of the inner and outer ends of double-layer subsea pipelines. The inner pipe needs to be exposed by 400mm at the assembly end, and it can especially protect the machined bevel of the end face of the inner pipe of the subsea pipeline.

[0025] Reference Figure 1 and Figure 2As shown, this utility model discloses a connecting structure device for a top-pull pipe, including a main connecting pipe 7, a front top-pull pipe component and a rear pull-pipe component. The front top-pull pipe component is fixedly installed at one end of the main connecting pipe 7, and the rear pull-pipe component is fixedly installed at the other end of the main connecting pipe 7.

[0026] Specifically, the front jacking pipe component includes a front jacking plate 5, which is fixedly mounted on one side of the main connecting pipe 7. A front upper limit plate 3 and a lower limit plate 2 are welded to the side of the front jacking plate 5. A front end slot is formed between the front upper limit plate 3 and the lower limit plate 2. A front soft rubber pad 4 is provided on the side of the front jacking plate 5, located within the front end slot. In use, the front soft rubber pad 4 protects the integrity of the machined bevel.

[0027] The upper part of the front upper limit plate 3 is welded with a lifting point 1, and a steel wire rope 16 is connected through the lifting point 1. Pulling the steel wire rope 16 will move the device.

[0028] When in use, under the action of the hoisting point of the winch wire connection, the front soft rubber pad 4 moves forward against the machined bevel of the inner tube 14 of the subsea pipeline. The front soft rubber pad 4 has a large contact area with the machined bevel and has a buffering effect, protecting the bevel from being damaged and keeping the surface intact.

[0029] The rear tube pulling component includes a rear top pulling plate 11 and a rear lower limiting plate 8 welded to the bottom of the rear top pulling plate 11. The rear top pulling plate 11 is fixedly welded to the other end of the main connecting pipe 7. The rear lower limiting plate 8 and the main connecting pipe 7 have a rear end groove, the height of which is greater than the wall thickness of the outer pipe 13. A rear soft rubber pad 10 is provided on the side of the rear top pulling plate 11, and the rear soft rubber pad 10 is located in the rear end groove. In use, the rear soft rubber pad 10 protects the integrity of the machined bevel.

[0030] Furthermore, reinforcing ribs 9 are welded to the front and rear ends of the main connecting pipe 7, and a safety handrail 12 is provided on the side of the rear top pull plate 11.

[0031] Working principle and usage procedure of the connection structure device for jacking pipes: Reference Figure 3 and Figure 4 As shown, during operation, the wire rope 16 is threaded through the inner tube 14, and a shackle is added to the wire rope 16. It is connected to the lifting point 1 of the connecting structure. The front slot of the front part of the device engages the machined opening of the inner tube 14, and the front soft rubber pad 4 effectively protects the bevel surface from damage. Simultaneously, the rear slot of the rear part of the top-pull pipe connecting structure engages the opening of the outer tube 13, and the rear soft rubber pad 10 effectively protects the bevel surface of the outer opening from damage. The distance between the front and rear slots is equal to the distance in the direction of the weld bead 17 of the outer tube. The inner tube 14 protrudes to the exposed end 15, which also facilitates the next process.

[0032] The wire rope is connected to the winch. The winch is started and the wire rope 16 begins to be retracted. The front end of the device hooks onto the inner opening and pushes against the inner tube 14 to move. When it moves to the rear end of the device and approaches the outer opening, the rear end of the device pulls the outer opening and moves together.

[0033] The outer pipe 13 moves with the inner pipe 14 to achieve rapid assembly of the outer pipe, protecting the integrity of the machined bevel of the inner pipe 14, and the front end of the main connecting pipe 7 protrudes 400mm from the inner pipe. Figure 3 The direction of the middle arrow indicates the direction of movement of the device.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A connecting structure device for a top-pull pipe, characterized in that, It includes a main connecting pipe (7), a front jacking pipe component and a rear pulling pipe component. The front jacking pipe component is fixedly installed at one end of the main connecting pipe (7), and the rear pulling pipe component is fixedly installed at the other end of the main connecting pipe (7). The front jacking pipe component is provided with a front end slot and a front soft rubber pad (4) is provided in the front end slot. The rear pulling pipe component is provided with a rear end slot and a rear soft rubber pad (10) is provided in the rear end slot.

2. The connection structure device for a top-pull pipe according to claim 1, characterized in that, The front top pipe component includes a front top plate (5), which is fixedly installed on one side end of the main connecting pipe (7). A front upper limit plate (3) and a lower limit plate (2) are fixedly installed on the side of the front top plate (5), and a front end slot is provided between the front upper limit plate (3) and the lower limit plate (2).

3. The connection structure device for a top-pull pipe according to claim 2, characterized in that, The front top plate (5) is provided with a front soft rubber pad (4) on its side, and the front soft rubber pad (4) is located in the front end slot.

4. The connecting structure device for a top-pull pipe according to claim 2, characterized in that, The upper part of the front upper limit plate (3) is fixedly provided with a lifting point (1).

5. The connecting structure device for a top-pull pipe according to claim 2, characterized in that, The rear pull tube component includes a rear top pull plate (11) and a rear lower limit plate (8) fixedly installed at the bottom of the rear top pull plate (11).

6. The connecting structure device for a top-pull pipe according to claim 5, characterized in that, The rear top pull plate (11) is fixedly installed at the other end of the main body connecting pipe (7), and the rear lower limit plate (8) has a rear end slot between it and the main body connecting pipe (7).

7. The connecting structure device for a top-pull pipe according to claim 6, characterized in that, The height of the rear end slot is greater than the wall thickness of the outer tube.

8. The connecting structure device for a top-pull pipe according to claim 7, characterized in that, The rear top pull plate (11) is provided with a rear soft rubber pad (10) on its side, and the rear soft rubber pad (10) is located in the rear end slot.

9. The connection structure device for a top-pull pipe according to claim 1, characterized in that, Reinforcing ribs (9) are fixedly installed at the front and rear ends of the upper part of the main connecting pipe (7).

10. The connecting structure device for a top-pull pipe according to claim 5, characterized in that, A safety handrail (12) is provided on the side of the rear top pull plate (11).

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