Suction barrel type submarine cable fixing device and fixing method thereof

Abstract

The invention relates to the technical field of submarine cable fixing equipment, in particular to a suction barrel type submarine cable fixing device which comprises a barrel fixing assembly, a suction barrel part and an extension fixing part, the two sides of the suction barrel part are connected with the barrel fixing assembly in a welded mode, and the suction barrel part communicates with the barrel fixing assembly; a butt joint port used for being connected with a pump valve system is formed in the suction cylinder part, the cylinder fixing assembly is connected with the extension fixing part, the suspension section submarine cable is fixed by arranging the containing space formed among the cylinder fixing assembly, the suction cylinder part and the extension fixing part, movement of the submarine cable is limited, scouring to the submarine cable is reduced, the phenomenon that the submarine cable is suspended is avoided, and the service life of the submarine cable is prolonged. The invention further provides a fixing method of the device, a traditional piling method is not adopted for installing the deep burying device any more, the principle of a suction barrel is utilized, water in the device is extracted through a pump valve system, the pressure intensity is reduced, the internal and external pressure difference is generated, the suction barrel type submarine cable fixing device is forced to penetrate into silt, and the device is deeply buried so as to fix the submarine cable.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable fixing devices, and particularly to a suction bucket type submarine cable fixing device and a fixing method thereof. Background Art

[0002] In the prior art, due to scouring, large sections of submarine cables will inevitably be suspended in the air. At this time, under the influence of water flow, the submarine cables will undergo vortex-induced vibration and bend. During long-term bending movement, the surface and interior of the submarine cables will be worn and damaged; in addition, the suspended submarine cables are more strongly affected by the water flow impact and are more likely to drive the nearby non-suspended submarine cables to move, resulting in increased friction between the nearby submarine cables and the seabed and wear; the suspended submarine cables will also bear higher bearing capacity due to their own weight and are easily damaged. Most of the existing protection devices use rock throwing protection and support fixed devices to fix the submarine cables. However, if the measures for rock throwing protection are not taken properly, the pipeline cannot be well restricted, and the pipeline will rub against the surrounding stones, resulting in more serious damage; moreover, water flow will enter through the gaps between the stones and form a flow in the gaps, which will continuously wash out fine sand or stones, ultimately leading to the failure of the protection measures; at the same time, at the edge of the rock throwing layer, scouring will also occur around these stones, resulting in instability and deformation; moreover, the shape or protective layer built by rock throwing often collapses under the action of water flow, destroying the original shape and thus losing its effect;

[0003] When using a support fixed device to fix the submarine cable, piling must be carried out, resulting in huge costs. The patent document with the application number 202123045583.4 discloses a method for preventing scouring and protecting the pile foundation of an offshore wind turbine and the suspended power transmission submarine cable at the outlet. It discloses that the scouring effect of ocean currents on the pile foundation and the power transmission submarine cable is reduced through multiple layers of defenses in sequence. The first layer of defense is achieved by filtering and absorbing energy with gravel to reduce the flow velocity of the ocean current in the horizontal direction. The second layer of defense is achieved by filtering and absorbing energy with gravel to weaken or completely eliminate the downflow in front of the pile foundation. The third layer of defense is achieved by a water wall naturally formed by low-velocity ocean currents after the ocean current passes through the first layer of defense and the second layer of defense. The fourth layer of defense is achieved by forming a bottom protection with gravel laid on the seabed surface around the pile foundation. It mainly fixes the suspended submarine cable by setting multiple layers of support fixed devices, which is costly and requires multiple piling. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a suction bucket type submarine cable fixing device and a fixing method thereof.

[0005] To achieve the above object, the present invention provides a suction cylinder type submarine cable fixing device, comprising: a cylinder fixing component, a suction cylinder part and an extension fixing part. The suction cylinder part is a hollow structure. Both sides of the suction cylinder part are welded and connected to the cylinder fixing component. The suction cylinder part is communicated with the cylinder fixing component. An interface for connecting a pump valve system is provided on the suction cylinder part. The cylinder fixing component is connected to the extension fixing part. By providing the cylinder fixing component, the suction cylinder part and the extension fixing part, the accommodation space formed among the three is used to fix the suspended section of the submarine cable, which can limit the movement of the submarine cable and reduce the scouring of the submarine cable at the same time, effectively avoiding the occurrence of the phenomenon that the submarine cable is suspended, and making the device more stable. By providing the fixed extension part, the bearing performance of the fixing device is high, preventing the submarine cable from being suspended, and at the same time being able to cut off the water flow, reducing the seepage intensity, so that there will be no scouring and starting under the submarine cable, and the adverse effect of scouring can be reduced.

[0006] As an alternative embodiment, in the suction cylinder type submarine cable fixing device provided by the present invention, the cylinder fixing component includes a bent pipe cylinder, a first connecting cylinder and a second connecting cylinder. The bent pipe cylinder, the first connecting cylinder and the second connecting cylinder are all hollow structures. Both ends of the bent pipe cylinder are respectively connected to the first connecting cylinder and the second connecting cylinder. The bent pipe cylinder is welded and connected to the suction cylinder part and is communicated with the suction cylinder part. By providing the bent pipe cylinder, the first connecting cylinder and the second connecting cylinder, the depths of the first connecting cylinder and the second connecting cylinder buried in the seabed are 3-4 times the diameter of the submarine cable. The accommodation space formed by the inner circle of the bent pipe cylinder is used to clamp the submarine cable. The bent pipe cylinder, the first connecting cylinder and the second connecting cylinder cooperate with the extension fixing part, and the first connecting cylinder and the second connecting cylinder can be buried in the sediment of the seabed to play a role in fixing the submarine cable.

[0007] As an alternative embodiment, in the suction cylinder type submarine cable fixing device provided by the present invention, the bent pipe cylinder has a semi-circular structure to facilitate matching the shape of the submarine cable.

[0008] As an alternative embodiment, in the suction cylinder type submarine cable fixing device provided by the present invention, the bent pipe cylinder is vertically connected to the suction cylinder part, which can increase the stability of the whole device.

[0009] As an alternative embodiment, in the suction barrel type submarine cable fixing device provided by the present invention, the adjacent two first connecting cylinders and the adjacent two second connecting cylinders are respectively sleeved with the extension fixing parts, and the extension tops are respectively fixedly connected to the first connecting cylinder and the second connecting cylinder. By respectively sleeving the extension fixing parts on the first connecting cylinder and the second connecting cylinder, the phenomena of suspension and instability caused by the scouring around the cylinder fixing component and the submarine cable can be reduced. The width of the extension fixing part at one end outside the first connecting cylinder is set to be 1.2 times the diameter length of the first connecting cylinder, and the width of the extension fixing part at one end inside the first connecting cylinder is set to be the same as the diameter of the submarine cable. Similarly, the width of the extension fixing part sleeved on the second connecting cylinder is set the same as the width sleeved on the first connecting cylinder. The extension fixing part just surrounds the first connecting cylinder and the second connecting cylinder, which can not only restrict the movement of the submarine cable but also reduce the scouring of the submarine cable.

[0010] As an alternative embodiment, in the suction barrel type submarine cable fixing device provided by the present invention, the accommodating space formed between the adjacent two elbow cylinders and the extension fixing part is used to fix the submarine cable, to restrict the movement of the submarine cable, fix the submarine cable in the suspended section, and can also reduce the scouring of the suspended section of the submarine cable.

[0011] As an alternative embodiment, in the suction barrel type submarine cable fixing device provided by the present invention, the bottoms of the first connecting cylinder and the second connecting cylinder are both provided with conical spike parts. After pumping water, the submarine cable fixing device is pressed into the seabed under the action of the pressure difference to overcome the sediment resistance. In order to ensure that the submarine cable fixing device can be smoothly pressed into the sediment, the resistance needs to be minimized as much as possible. The bottoms of the first connecting cylinder and the second connecting cylinder are provided with conical spike parts, which are designed as sharp conical spike parts, so that the stress areas of the first connecting cylinder and the second connecting cylinder are reduced, which is more conducive to the sinking of the device.

[0012] As an alternative embodiment, in the suction barrel type submarine cable fixing device provided by the present invention, the extension fixing part has a rectangular plate-like structure. By setting the rectangular plate-like structure, it is convenient to enclose with the first connecting cylinder and the second connecting cylinder to form an accommodating space for the submarine cable, which is convenient for fixing the submarine cable. By setting the fixed extension part with a rectangular plate-like structure, no scouring pits will be formed beside the first connecting cylinder and the second connecting cylinder, so that the bearing performance of the fixing device is high, preventing the submarine cable from being suspended. At the same time, it can also cut off the water flow, reduce the seepage intensity, and no scouring and starting will occur below the submarine cable, which can reduce the adverse effects of scouring.

[0013] Preferably, the present invention also provides a fixing method based on the suction barrel type submarine cable fixing device described in any one of the above, including the following steps:

[0014] S1: Determine the position of the suspended submarine cable based on the submarine cable laid on the seabed. After determining the position of the suspended submarine cable, use a crane to place the fixing device on the seabed of the suspended submarine cable. The fixing device penetrates into a part of the sediment under its own weight.

[0015] S2: Connect the pump valve system to the docking interface on the fixing device. Extract the accumulated water in the cylinder fixing component through the pump valve system to reduce the pressure and generate an internal and external pressure difference, so that the fixing device penetrates into the sediment, thereby realizing the device burial depth to fix the suspended submarine cable until the extended fixing part of the fixing device contacts the seabed mud surface. Stop pumping water, remove the pump valve system, and the installation and fixation of the fixing device are completed.

[0016] The fixing method of the suction cylinder type submarine cable fixing device provided by the present invention no longer uses the traditional piling method to install the deep burial device. Utilizing the principle of the suction cylinder, the water in the device is extracted through the pump valve system to reduce the pressure and generate an internal and external pressure difference, forcing the suction cylinder type submarine cable fixing device to penetrate into the sediment, thereby realizing the device burial depth to fix the submarine cable.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the present invention: The suction cylinder type submarine cable fixing device provided by the present invention, by setting a cylinder fixing component, a suction cylinder part and an extended fixing part, the two sides of the suction cylinder part are respectively welded and connected to the cylinder fixing component, the suction cylinder part is communicated with the cylinder fixing component, and a docking interface for connecting the pump valve system is provided on the suction cylinder part. The cylinder fixing component is connected to the extended fixing part. By setting the cylinder fixing component, the suction cylinder part and the extended fixing part, the accommodation space formed among the three is used to fix the suspended submarine cable, which can limit the movement of the submarine cable and also reduce the scouring of the submarine cable, effectively avoiding the occurrence of the submarine cable suspension phenomenon, and the device is more stable. The fixing method of the suction cylinder type submarine cable fixing device provided by the present invention no longer uses the traditional piling method to install the deep burial device. Utilizing the principle of the suction cylinder, the water in the device is extracted through the pump valve system to reduce the pressure and generate an internal and external pressure difference, forcing the suction cylinder type submarine cable fixing device to penetrate into the sediment, thereby realizing the device burial depth to fix the submarine cable. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic structural diagram of the suction cylinder type submarine cable fixing device provided by the present invention;

[0020] Figure 2Front view structural schematic diagram of the suction cylinder type submarine cable fixing device provided by the present invention;

[0021] Figure 3 is Figure 2 Partial enlarged schematic diagram at position A in;

[0022] Figure 4 Installation structural schematic diagram of the suction cylinder type submarine cable fixing device provided by the present invention.

[0023]

Description of reference numerals

[0024] 1. Cylinder fixing assembly; 11. Elbow cylinder; 12. First connecting cylinder; 13. Second connecting cylinder; 14. Conical spike part; 2. Suction cylinder part; 21. Docking port; 3. Extension fixing part; 4. Submarine cable; 5. Seabed. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that all directional indications such as first, second, up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0028] The present invention provides a suction cylinder type submarine cable fixing device, as Figures 1-4As shown in the figure, it includes: a cylinder fixing component 1, a suction cylinder part 2, and an extension fixing part 3. The suction cylinder part 2 is a hollow structure, preferably a hollow circular tube structure. The two sides of the suction cylinder part 2 are respectively welded to the cylinder fixing component 1. The suction cylinder part 2 is communicated with the cylinder fixing component 1. An interface 21 for connecting a pump valve system is provided on the suction cylinder part 2. The cylinder fixing component 1 is connected to the extension fixing part 3. By setting the cylinder fixing component 1, the suction cylinder part 2, and the extension fixing part 3, a containing space formed among the three is used to fix the suspended submarine cable 4, which can limit the movement of the submarine cable 4 and also reduce the scouring of the submarine cable 4, effectively avoiding the occurrence of the phenomenon that the submarine cable 4 is suspended, and the device is more stable. By setting the fixed extension part, the bearing performance of the fixing device is high, preventing the submarine cable 4 from being suspended. At the same time, it can also cut off the water flow, reduce the seepage intensity, and there will be no scouring start below the submarine cable 4, which can reduce the adverse impact of scouring.

[0029] As Figure 1 shown, in the suction cylinder type submarine cable fixing device provided by the present invention, the cylinder fixing component 1 includes an elbow cylinder 11, a first connecting cylinder 12, and a second connecting cylinder 13. The elbow cylinder 11, the first connecting cylinder 12, and the second connecting cylinder 13 are all hollow structures, preferably all hollow circular tube structures. The two ends of the elbow cylinder 11 are respectively connected to the first connecting cylinder 12 and the second connecting cylinder 13. The elbow cylinder 11 is welded to the suction cylinder part 2 and is communicated with the suction cylinder part 2. By setting the elbow cylinder 11, the first connecting cylinder 12, and the second connecting cylinder 13, the depth of the first connecting cylinder 12 and the second connecting cylinder 13 buried in the seabed 5 is 3 - 4 times the diameter of the submarine cable 4. The accommodating space formed by the inner circle of the elbow cylinder 11 is used to clamp the submarine cable 4. The elbow cylinder 11, the first connecting cylinder 12, and the second connecting cylinder 13 cooperate with the extension fixing part 3, and the first connecting cylinder 12 and the second connecting cylinder 13 can be buried in the sediment of the seabed 5 to play a role in fixing the submarine cable 4. Further preferably, for the convenience of production and connection integrity, the suction cylinder part 2, the elbow cylinder 11, the first connecting cylinder 12, and the second connecting cylinder 13 are all connected by welding to form the fixing main body of the suction cylinder type submarine cable fixing device. The suction cylinder part 2, the elbow cylinder 11, the first connecting cylinder 12, and the second connecting cylinder 13 are all hollow circular tube structures.

[0030] Furthermore, in the suction cylinder type submarine cable fixing device provided by the present invention, the elbow cylinder 11 has a semi-circular structure to facilitate matching with the shape of the submarine cable 4.

[0031] In addition, in the suction cylinder type submarine cable fixing device provided by the present invention, the elbow cylinder 11 is vertically connected to the suction cylinder part 2, which can increase the stability of the whole device.

[0032] As Figure 1 and Figure 2As shown in the figure, in the suction cylinder type submarine cable fixing device provided by the present invention, extension fixing parts 3 are respectively sleeved on two adjacent first connecting cylinders 12 and two adjacent second connecting cylinders 13, and the extension tops are respectively fixedly connected to the first connecting cylinder 12 and the second connecting cylinder 13. By respectively sleeving the extension fixing parts 3 on the first connecting cylinder 12 and the second connecting cylinder 13, it can reduce the suspension and instability phenomena caused by the scouring around the cylinder fixing assembly 1 and the submarine cable 4. The width of the extension fixing part 3 at one end outside the first connecting cylinder 12 is set to be 1.2 times the diameter length of the first connecting cylinder 12, and the width of the extension fixing part 3 at one end inside the first connecting cylinder 12 is set to be the same as the diameter of the submarine cable 4. Similarly, the width of the extension fixing part 3 sleeved on the second connecting cylinder 13 is the same as the width of the extension fixing part 3 sleeved on the first connecting cylinder 12. The extension fixing part 3 exactly surrounds the first connecting cylinder 12 and the second connecting cylinder 13, which can not only limit the movement of the submarine cable 4 but also reduce the scouring of the submarine cable 4.

[0033] Preferably, as Figure 4 shown in the figure, in the suction cylinder type submarine cable fixing device provided by the present invention, an accommodation space formed between two adjacent elbow cylinders 11 and the extension fixing part 3 is used to fix the submarine cable 4 to limit the movement of the submarine cable 4, fix the submarine cable 4 in the suspension section, and can also reduce the scouring of the submarine cable 4 in the suspension section.

[0034] As Figure 3 shown in the figure, in the suction cylinder type submarine cable fixing device provided by the present invention, conical spike parts 14 are provided at the bottoms of the first connecting cylinder 12 and the second connecting cylinder 13. After pumping water, the submarine cable 4 fixing device is pressed into the seabed 5 under the action of the pressure difference to overcome the sediment resistance. In order to ensure that the submarine cable 4 fixing device can be smoothly pressed into the sediment, the resistance needs to be minimized as much as possible. Conical spike parts 14 are provided at the bottoms of the first connecting cylinder 12 and the second connecting cylinder 13, designed as sharp conical spikes, so that the stress area of the first connecting cylinder 12 and the second connecting cylinder 13 is reduced, which is more conducive to the sinking of the device.

[0035] Further preferably, in the suction cylinder type submarine cable fixing device provided by the present invention, the extension fixing part 3 has a rectangular plate-like structure. By setting the rectangular plate-like structure, it is convenient to enclose an accommodation space for the submarine cable 4 with the first connecting cylinder 12 and the second connecting cylinder 13, which is convenient for fixing the submarine cable 4. The fixed extension part with a rectangular plate-like structure will not form a scouring pit beside the first connecting cylinder 12 and the second connecting cylinder 13, so that the bearing performance of the fixing device is high, preventing the submarine cable 4 from being suspended. At the same time, it can also cut off the water flow, reduce the seepage intensity, and there will be no scouring and starting under the submarine cable 4, which can reduce the adverse effects of scouring.

[0036] The present invention also provides a fixing method for the suction cylinder type submarine cable fixing device based on any one of the above, including the following steps:

[0037] S1: Determine the position of the suspended submarine cable 4 according to the submarine cable 4 laid on the seabed 5. After determining the position of the suspended submarine cable 4, use a crane to place the fixing device on the seabed 5 of the suspended submarine cable 4, and the fixing device penetrates into a part of the sediment under its own weight.

[0038] S2: Connect the pump-valve system to the docking port 21 on the fixing device, and extract the accumulated water in the cylinder fixing assembly 1 through the pump-valve system to reduce the pressure and generate an internal and external pressure difference, so that the fixing device penetrates into the sediment, thereby realizing the burial depth of the device to fix the suspended submarine cable 4 until the extended fixing part 3 of the fixing device contacts the mud surface of the seabed 5, stop pumping water, withdraw the pump-valve system, and the installation and fixation of the fixing device are completed.

[0039] The fixing method of the suction cylinder type submarine cable fixing device provided by the present invention no longer uses the traditional piling method to install the deep burial device. Utilizing the principle of the suction cylinder, the water in the device is extracted through the pump-valve system to reduce the pressure and generate an internal and external pressure difference, forcing the suction cylinder type submarine cable fixing device to penetrate into the sediment, thereby realizing the burial depth of the device to fix the submarine cable 4.

[0040] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A suction cylinder type submarine cable fixing device, characterized in that, It includes a cylinder fixing component (1), a suction cylinder part (2) and an extension fixing part (3). The suction cylinder part (2) is of a hollow structure. The two sides of the suction cylinder part (2) are respectively welded to the cylinder fixing component (1). The suction cylinder part (2) is communicated with the cylinder fixing component (1). A docking port (21) for connecting a pump valve system is provided on the suction cylinder part (2). The cylinder fixing component (1) is connected to the extension fixing part (3).

2. The suction cylinder type submarine cable fixing device according to claim 1, characterized in that, The cylinder fixing component (1) includes a bent pipe cylinder (11), a first connecting cylinder (12) and a second connecting cylinder (13). The bent pipe cylinder (11), the first connecting cylinder (12) and the second connecting cylinder (13) are all of hollow structures. The two ends of the bent pipe cylinder (11) are respectively connected to the first connecting cylinder (12) and the second connecting cylinder (13). The bent pipe cylinder (11) is welded to the suction cylinder part (2) and is communicated with the suction cylinder part (2).

3. The suction cylinder type submarine cable fixing device according to claim 2, characterized in that, The bent pipe cylinder (11) is of a semi-circular structure.

4. The suction cylinder type submarine cable fixing device according to claim 2, wherein, The bent pipe cylinder (11) is vertically connected to the suction cylinder part (2).

5. The suction cylinder type submarine cable fixing device according to claim 2, characterized in that, The extension fixing part (3) is respectively sleeved on two adjacent first connecting cylinders (12) and two adjacent second connecting cylinders (13), and the extension top is respectively fixedly connected to the first connecting cylinder (12) and the second connecting cylinder (13).

6. The suction cylinder type submarine cable fixing device according to claim 2, wherein The accommodating space formed between two adjacent bent pipe cylinders (11) and the extension fixing part (3) is used to fix the submarine cable (4).

7. The suction cylinder type submarine cable fixing device according to claim 2, wherein, Conical spike parts (14) are provided at the bottoms of the first connecting cylinder (12) and the second connecting cylinder (13).

8. The suction cylinder type submarine cable fixing device according to claim 1, characterized in that, The extension fixing part (3) is of a rectangular plate-like structure.

9. A fixing method for the suction barrel type submarine cable fixing device according to any one of claims 1-8, characterized in that, It includes the following steps: S1: Determine the position of the suspended section of the submarine cable (4) according to the submarine cable (4) laid on the seabed (5). After determining the position of the suspended section of the submarine cable (4), use a crane to place this fixing device on the seabed (5) of the suspended section of the submarine cable (4). This fixing device penetrates into a part of the sediment under its own weight. S2: Docking the pump valve system with the docking port (21) on this fixing device. By pumping out the accumulated water in the cylinder fixing component (1) through the pump valve system to reduce the pressure and generate an internal and external pressure difference, so that this fixing device penetrates into the sediment, thereby realizing the device burial depth to fix the suspended section of the submarine cable (4) until the extension fixing part (3) of this fixing device contacts the seabed mud surface, stop pumping water, evacuate the pump valve system, and this fixing device is installed and fixed.

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