Subsea pipe cable system

Abstract

The submarine pipe cable system comprises a pipe cable, a plurality of first protection devices and a plurality of second protection devices, the pipe cable is suitable for being laid in the seabed, the first protection devices are suitable for being arranged in a seabed area with a first flow speed, the first protection devices are arranged on the pipe cable, and each first protection device comprises a plurality of first protection pieces and a plurality of second protection pieces, the first protection parts are special-shaped blocks and stacked on the pipe cable, the second protection parts are arranged on one sides of the first protection parts, the second protection devices are suitable for being arranged in a seabed area with a second flow speed, the second protection devices are all arranged on the pipe cable, and each second protection device comprises a plurality of third protection parts and a plurality of fourth protection parts. The third protection parts are made of flexible materials and evenly distributed on the pipe cable, and the fourth protection parts are special-shaped blocks and stacked on the two sides of the third protection parts. The erosion effect around the pipe cable can be effectively relieved, the construction difficulty and the material requirement are reduced, and meanwhile wide engineering applicability and high efficiency are achieved.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and in particular to a submarine cable system. Background Art

[0002] During the laying and operation of submarine cables, the tides and waves in the marine environment can easily cause scouring effects around cables, posing a serious threat to their safety and stability. In the relevant technologies, commonly used anti-scouring technologies include sandbags, concrete block interlocking soft-shell rows, etc., but these methods have the following significant defects: sandbag stacking requires extremely high precision, consumes a lot of manpower and time, resulting in low construction efficiency; although concrete block interlocking soft-shell rows are resistant to scouring, they are easily overturned in strong hydrodynamic environments, limiting their protective effect. Summary of the invention

[0003] Based on this, it is necessary to provide an efficient, adaptable and cost-effective anti-scour device to address the current problems of low construction efficiency and limited protection effect.

[0004] The above object is achieved by the following technical solution: a submarine cable system, comprising: a cable, the cable is suitable for being laid in the seabed; a first protective device, the first protective device is suitable for being arranged in a seabed area with a first flow velocity, the first protective device is arranged on the cable, the first protective device comprises a plurality of first protective members and a second protective member, the plurality of first protective members are special-shaped blocks and are stacked on the cable, so that the first protective member forms a protective layer on the outer peripheral side of the cable, the second protective member is arranged on one side of the plurality of first protective members, and the second protective member is used to reduce the local flow velocity around the second protective member to form a stable flow field; a second protective device, the second protective device is suitable for being arranged in a seabed area with a second flow velocity, the first flow velocity is less than the second flow velocity, the second protective device is arranged on the cable, the second protective device comprises a plurality of third protective members and a plurality of fourth protective members, the third protective members are made of flexible materials and are evenly distributed on the cable, so that the third protective members form a protective layer on the outer peripheral side of the cable, the fourth protective member is a special-shaped block and is stacked on both sides of the third protective member, and the fourth protective member is used to reduce the hydrodynamic load around the third protective member to avoid the third protective member being overturned.

[0005] The submarine cable system of the embodiment of the present invention protects the cable through the first protection device and the second protection device, thereby ensuring the safety of the cable. The first protection device and the second protection device are set according to different flow rates, which not only ensures the protection effect, but also avoids the waste of resources caused by excessive protection, reduces labor costs and construction time, and improves construction efficiency.

[0006] In one embodiment, the first protective element has a first spoiler, and the fourth protective element has a second spoiler, one of the first spoiler and the second spoiler is either a protrusion or a groove, and the first spoiler and the second spoiler are both used to disrupt the water flow around the cable to destroy the continuity of the water flow.

[0007] In one embodiment, there are multiple first spoilers, and the multiple first spoilers are arranged on the outer peripheral surface of the first protective element and are spaced apart along the circumference of the first protective element, and / or there are multiple second spoilers, and the multiple second spoilers are arranged on the outer peripheral surface of the fourth protective element and are spaced apart along the circumference of the second protective element.

[0008] In one embodiment, at least one of the first protective member and the fourth protective member is in any one of an anvil shape, a three-block shape, a hollow tetrahedron shape and a three-column shape.

[0009] In one embodiment, the second protective element includes a first protective unit and a second protective unit, the first protective unit and the second protective unit are respectively arranged on both sides of the first protective element and are relatively spaced apart along the radial direction of the cable, and the first protective unit and the second protective unit are both used to reduce the local flow velocity on both sides of the cable.

[0010] In one embodiment, the first protection unit and the second protection unit each include a first protection column, a second protection column, a third protection column and a fourth protection column, the fourth protection column extends in the up and down directions, the first protection column, the second protection column and the third protection column all extend in the horizontal direction and the first protection column, the second protection column and the third protection column are circumferentially spaced around the fourth protection column, one end of the first protection column, the second protection column and the third protection column are all connected to the fourth protection column, and the first protection member is located between the first protection column and the second protection column.

[0011] In one embodiment, the angle between the extension direction of the first protective column and the extension direction of the second protective column is 120°-180°, the first protective column extends in a direction away from the second protective column and is inclined in a direction adjacent to the first protective element, and the second protective column extends in a direction away from the first protective column and is inclined in a direction adjacent to the first protective element.

[0012] In one embodiment, a plurality of the third protective elements are arranged in a plurality of rows along the axial direction of the umbilical, and each row includes a plurality of third protective elements arranged in a radial direction of the umbilical, so that the third protective elements form a protective layer on the outer peripheral side of the umbilical.

[0013] In one embodiment, the fourth protection element includes a plurality of third protection units and a plurality of fourth protection units, wherein the plurality of third protection units are stacked on one side of the third protection element, and the plurality of fourth protection units are stacked on the other side of the third protection element.

[0014] In one of the embodiments, the submarine umbilical cable system further comprises a detection component, wherein the detection component is disposed on one side of the umbilical cable, and the detection component is used to detect a position of the first protective device or the second protective device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the installation of a submarine cable system and a first protective device according to an embodiment of the present invention; Figure 2 A top view of a first protective device of a submarine cable system according to an embodiment of the present invention; Figure 3 It is a front view of a first protective device of a submarine cable system according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a second protective member of a submarine cable system according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the installation of the umbilical cable and the second protective device of the submarine umbilical cable system according to one embodiment of the present invention; Figure 6 It is a structural schematic diagram of a first protective device of a submarine cable system according to an embodiment of the present invention; Figure 7 The figure is a schematic structural diagram of a first protective member of a submarine cable system according to an embodiment of the present invention.

[0016] in: 100. Submarine cable system; 1. Cable; 2. First protection device; 21. First protection element; 211. Anvil-shaped; 212. Three-block-shaped; 213. Hollow tetrahedron-shaped; 214. Three-column-shaped; 22. Second protection element; 221. First protection unit; 2211. First protection column; 2212. Second protection column; 2213. Third protection column; 2214. Fourth protection column; 222. Second protection unit; 3. Second protection device; 31. Third protection element; 32. Fourth protection element; 321. Third protection unit; 322. Fourth protection unit. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0019] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] like Figure 1-Figure 7 As shown, the submarine umbilical cable system 100 of the embodiment of the present invention includes an umbilical cable 1 , a first protection device 2 and a second protection device 3 .

[0021] The umbilical cable 1 is suitable for being laid in the seabed, the first protective device 2 is suitable for being arranged in the seabed area of ​​the first flow velocity, the first protective device 2 is arranged on the umbilical cable 1, the first protective device 2 includes a plurality of first protective members 21 and a second protective member 22, the plurality of first protective members 21 are special-shaped blocks and are stacked on the umbilical cable 1, so that the first protective members 21 form a protective layer on the outer peripheral side of the umbilical cable 1, the second protective member 22 is arranged on one side of the plurality of first protective members 21, and the second protective member 22 is used to reduce the local flow velocity around the second protective member 22 to form a stable flow field.

[0022] Specifically, Figure 1-Figure 4As shown, the umbilical cable 1 extends in the front-to-back direction and is arranged on the seabed, the first flow velocity is a medium-low flow velocity, the first protective device 2 is arranged in the seabed area with a medium-low flow velocity, the first protective device 2 is arranged on the outer peripheral surface of the umbilical cable 1, the first protective member 21 is a special-shaped block and is stacked on the outer peripheral side of the umbilical cable 1, the first protective member 21 is used for disturbing the flow and reducing the local flow velocity around the umbilical cable 1, so that the first protective member 21 forms a protective layer on the outer peripheral side of the umbilical cable 1, and the second protective member 22 is arranged on the left and right sides of the first protective member 21. The second protective member 22 can reduce the local flow velocity around the second protective member 22 to form a stable flow field, prevent multiple first protective members 21 from being washed and displaced by seawater, and ensure the protective performance of the first protective member 21.

[0023] Since the first protective element 21 is designed to be directly stacked on the pipe cable 1, it has significant advantages over the sandbag stacking method used in traditional related technologies. First, in terms of construction technology, the first protective element 21 has relatively low requirements for construction accuracy, and there is no need to strictly control the placement and stacking angle of each sandbag like sandbag stacking, which reduces the difficulty of construction. Secondly, direct stacking significantly reduces the complexity of manual operation, which not only effectively reduces labor costs, shortens the construction period, but also greatly improves engineering efficiency. In addition, in medium and low hydrodynamic environments, the scouring power of water flow on the pipe cable 1 is relatively small. Therefore, the first protective element 21 reduces the local water flow energy of seawater, which can effectively protect the pipe cable 1 from scouring damage and maintain a long-term protective effect. Therefore, the first protective device 2 is suitable for arrangement in low-flow waters.

[0024] The second protection device 3 is suitable for being arranged in the seabed area of ​​the second flow velocity, the first flow velocity is less than the second flow velocity, the second protection device 3 is arranged on the umbilical cable 1, and the second protection device 3 includes a plurality of third protection members 31 and a plurality of fourth protection members 32. The third protection members 31 are made of flexible materials and are evenly distributed on the umbilical cable 1, so that the third protection members 31 form a protection layer on the outer peripheral side of the umbilical cable 1, and the fourth protection members 32 are special-shaped blocks and are stacked on both sides of the third protection members 31. The fourth protection members 32 are used to reduce the hydrodynamic load around the third protection members 31 to prevent the third protection members 31 from being overturned. Specifically, as Figure 5 and Figure 6As shown, the second flow velocity is a high flow velocity, the second protective device 3 is arranged in a seabed area with a high flow velocity, a plurality of second protective devices 3 are arranged at intervals in the left-right direction, the third protective member 31 is made of a flexible material, for example: concrete, the third protective member 31 is evenly distributed outside the umbilical cable 1, so that a stable protective layer is formed on the outer peripheral side of the umbilical cable 1 through the third protective member 31 to absorb the impact energy of the water flow, the fourth protective member 32 is a special-shaped block, a part of the plurality of fourth protective members 32 is stacked on the front side of the third protective member 31, and another part of the plurality of fourth protective members 32 is stacked on the rear side of the third protective member 31, thereby, the hydrodynamic load around the third protective member 31 is weakened by the plurality of fourth protective members 32 to avoid the third protective member 31 from being overturned, and in addition, the fourth protective member 32 can be rolled and rearranged under the action of the water flow to ensure that it maintains the protective effect.

[0025] Although the third protective member 31 needs to be evenly arranged along the outer peripheral side of the umbilical cable 1, and a plurality of fourth protective members 32 need to be arranged in a stacked manner at the front and rear axial positions of the third protective member 31, this multi-layer composite protective structure significantly increases the material consumption and installation time, resulting in a high overall construction cost of the second protective device 3. However, the third protective member 31 made of a flexible polymer material can effectively absorb and dissipate the impact kinetic energy of the water flow on the outer peripheral side of the umbilical cable 1, and the stacked arrangement of the fourth protective member 32 weakens the hydrodynamic load around the third protective member 31 to prevent the third protective member 31 from being overturned, further ensuring the protective performance of the third protective member 31. Therefore, the combination of the third protective member 31 and the fourth protective member 32 makes the second protective device 3 have stronger impact resistance and dynamic stability, making the second protective device 3 suitable for being arranged in high-velocity waters.

[0026] The submarine cable system 100 of the embodiment of the present invention is specifically designed according to the hydrodynamic characteristics of the submarine area. A first protective device 2 is arranged in the submarine area with medium and low flow rates. The first protective device 2 forms a stable turbulence protection layer by stacking and combining the first protective members 21. A second protective device 3 is arranged in the submarine area with high flow rates. The second protective device 3 effectively absorbs and dissipates the impact kinetic energy of the water flow on the outer peripheral side of the cable 1 through the third protective member 31, and weakens the hydrodynamic load around the third protective member 31 through the fourth protective member 32 to ensure the protective performance of the third protective member 31. Therefore, the first protective device 2 and the second protective device 3 not only ensure the protective effect, but also avoid the waste of resources caused by excessive protection, reduce labor costs and construction time, and improve construction efficiency.

[0027] In some embodiments, the first protective member 21 has a first spoiler, the fourth protective member 32 has a second spoiler, one of the first spoiler and the second spoiler is a projection or a groove, and the first spoiler and the second spoiler are used to disrupt the water flow around the umbilical cable 1 to destroy the continuity of the water flow. Specifically, Figure 1-Figure 7 As shown, the protrusion can be a semicircular, trapezoidal or triangular cross-sectional shape, and the groove can be a semicircular, trapezoidal or triangular groove, thereby enabling the adjacent first protective members 21 and the adjacent fourth protective members 32 to achieve mechanical engagement through the concave-convex cooperation of the spoiler, thereby enhancing the stability of the overall structure of the multiple first protective members 21 and the multiple fourth protective members 32, improving the protection performance of the first protective members 21 and the fourth protective members 32, and the protrusions and grooves can destroy the continuity of the water flow around the pipe and cable, reduce the local flow velocity, and reduce the direct impact of the water flow on the pipe and cable.

[0028] In some embodiments, there are multiple first spoilers, which are arranged on the outer peripheral surface of the first protective member 21 and are spaced apart along the circumference of the first protective member 21, and / or there are multiple second spoilers, which are arranged on the outer peripheral surface of the fourth protective member 32 and are spaced apart along the circumference of the second protective member 22. Thus, the spoiler performance, spoiler performance and protective performance of the first protective member 21 are improved by the multiple first spoilers, and the spoiler performance, spoiler performance and protective performance of the fourth protective member 32 are improved by the multiple second spoilers.

[0029] In some embodiments, at least one of the first protective member 21 and the fourth protective member 32 is in any of the shapes of an anvil 211, a three-block 212, a hollow tetrahedron 213, and a three-column 214. Figure 7As shown, the first guard 21 and the second guard 22 can be arranged according to actual conditions, for example: the first guard 21 and the fourth guard 32 include a body, and protrusions are provided at both upper and lower ends of the body, so that the first guard 21 and the fourth guard 32 are anvil-shaped 211, or, the first guard 21 and the fourth guard 32 include a connecting shaft, a plurality of first connecting blocks and a plurality of second connecting blocks, the plurality of first connecting blocks are arranged at one end of the connecting shaft at intervals along the circumference of the connecting shaft, and the plurality of second connecting blocks are arranged at the other end of the connecting shaft at intervals along the circumference of the connecting shaft so that the first guard 21 and the fourth guard 32 are three-connected block-shaped 212, or, the first guard 21 and the fourth guard 32 are three-connected block-shaped 212. The first protective member 21 and the fourth protective member 32 are tetrahedrons, and grooves are provided on the tetrahedrons, so that the first protective member 21 and the fourth protective member 32 are hollow tetrahedrons 213, or the first protective member 21 and the fourth protective member 32 include a connecting member and three columns, and the three columns are arranged at intervals along the circumference of the connecting member and are connected to the connecting member, so that the first protective member 21 and the fourth protective member 32 are three-column-shaped 214. Therefore, through the arrangement of the first protective member 21 and the fourth protective member 32, the first protective member 21 and the fourth protective member 32 are stably stacked, the water flow impact is effectively dispersed, and the protection efficiency of the first protective member 21 and the fourth protective member 32 is guaranteed.

[0030] In some embodiments, the second protection member 22 includes a first protection unit 221 and a second protection unit 222, which are respectively arranged on both sides of the first protection member 21 and are spaced opposite to each other along the radial direction of the umbilical cable 1, and the first protection unit 221 and the second protection unit 222 are both used to reduce the local flow velocity on both sides of the umbilical cable 1. Specifically, Figure 1-Figure 3 As shown, the first protection unit 221 is arranged on the front side of the first protection element 21, and the second protection unit 222 is arranged on the rear side of the first protection element 21. Thus, the front and rear sides of the first protection element 21 are protected by the first protection unit 221 and the second protection unit 222, thereby reducing the local flow velocity on the front and rear sides of the first protection element 21, ensuring that multiple first protection elements 21 are stably stacked, and preventing multiple first protection elements 21 from being blown away by seawater.

[0031] In some embodiments, the first protection unit 221 and the second protection unit 222 both include a first protection column 2211, a second protection column 2212, a third protection column 2213 and a fourth protection column 2214, the fourth protection column 2214 extends in the up-down direction, the first protection column 2211, the second protection column 2212, and the third protection column 2213 all extend in the horizontal direction, and the first protection column 2211, the second protection column 2212, and the third protection column 2213 are arranged at intervals around the circumference of the fourth protection column 2214, one end of the first protection column 2211, the second protection column 2212, and the third protection column 2213 are all connected to the fourth protection column 2214, and the first protection member 21 is located between the first protection column 2211 and the second protection column 2212. Specifically, as Figure 1 — Figure 4 As shown, the fourth protective column 2214 is a vertical column extending in the up-down direction, the first protective column 2211, the second protective column 2212, and the third protective column 2213 are all horizontal columns extending in the horizontal direction, the first protective column 2211, the second protective column 2212, and the third protective column 2213 are arranged at intervals around the circumference of the fourth protective column 2214, and one end of the first protective column 2211, the second protective column 2212, and the third protective column 2213 are all connected to the lower end of the fourth protective column 2214, so that the first protective column 2211, the second protective column 2212, and the third protective column 2213 form a tripod structure, which can effectively resist the impact of water flow and enhance the anti-scouring ability of the bottom of the first protective unit 221 and the second protective unit 222. The lower end of the fourth protective column 2214 can be directly inserted into the seabed or connected to the foundation structure The fourth protective column 2214 is connected to provide the main support force for the first protective unit 221 and the second protective unit 222 to prevent the structure from tilting or shifting due to water flow impact or self-weight, and the vertical structure of the fourth protective column 2214 can guide the water flow to pass through in layers to avoid the formation of a strong scouring flow in a single direction. In addition, the fourth protective column 2214 cooperates with the first protective column 2211, the second protective column 2212, and the third protective column 2213 to form a turbulent zone, so that the water flow forms turbulence around the protective unit, reducing the direct scouring of the submarine cable 1. Finally, the first protective element 21 is located between the first protective column 2211 and the second protective column 2212, so that the first protective column 2211 and the second protective column 2212 can form a barrier to the first protective element 21, which can effectively divide the high-speed water flow, force the water flow to undergo initial deflection, and reduce the direct impact on the cable 1.

[0032] In some embodiments, the angle between the extension direction of the first protective column 2211 and the extension direction of the second protective column 2212 is 120°-180°, the first protective column 2211 extends in a direction away from the second protective column 2212 and tilts in a direction adjacent to the first protective element 21, and the second protective column 2212 extends in a direction away from the first protective column 2211 and tilts in a direction adjacent to the first protective element 21. Specifically, Figure 1 — Figure 4 As shown, the angle between the first protective column 2211 and the second protective column 2212 can be any one of 120°, 130°, 140°, 150°, 160°, 170°, and 180°. The first protective column 2211 of the first protective unit 221 is arranged on the right side of the second protective column 2212 of the first protective unit 221, and the first protective column 2211 of the first protective unit 221 extends from left to right and tilts backward, and the second protective column 2212 of the first protective unit 221 extends from right to left and tilts backward, so that the first protective column 2211 of the first protective unit 221 and the second protective column 2212 of the first protective unit 221 form a V-shaped guide surface, the first protective column 2211 of the second protective unit 222 is arranged on the right side of the second protective column 2212 of the second protective unit 222, and the first protective column 2211 of the second protective unit 222 The column 2211 extends from left to right and tilts forward, and the second protective column 2212 of the second protective unit 222 extends from right to left and tilts forward, so that the first protective column 2211 of the second protective unit 222 and the second protective column 2212 of the second protective unit 222 form a V-shaped guide surface, and the first protective member 21 is arranged between the first protective column 2211 of the first protective unit 221 and the second protective column 2212 of the first protective unit 221, and the second protective member 22 is arranged between the first protective column 2211 of the first protective unit 221 and the second protective column 2212 of the second protective unit 222. When the water flow impacts the pipe cable 1, due to the arrangement of the first protective column 2211 and the second protective column 2212, the water flow can be forced to flow along the extension direction of the first protective column 2211 and the second protective column 2212, thereby reducing the direct impact on the first protective member 21 on the pipe cable 1.

[0033] In some embodiments, a plurality of third protective members 31 are arranged in a plurality of rows along the axial direction of the umbilical cable 1, and each row includes a plurality of third protective members 31 arranged in a radial direction of the umbilical cable 1, so that the third protective members 31 form a protective layer on the outer peripheral side of the umbilical cable 1. Specifically, Figure 5 and Figure 6 As shown, a plurality of third protective members 31 are arranged in a plurality of rows at intervals along the left-right direction, and each row includes a plurality of third protective members 31 arranged at intervals along the front-back direction, thereby forming a matrix protection network on the surface of the pipe and cable 1. When water flows impact the third protective layer, the third protective members 31 in the front row first contact the water flow, absorb the impact energy of the water flow through their own deformation and guide the direction of the water flow through the arrangement gap, and the protective members in the rear row respond in turn to form a multi-stage energy dissipation system. Therefore, the third protective structure can cope with water flow impacts of different magnitudes to ensure that the pipe and cable 1 is in a safe operating state for a long time.

[0034] In some embodiments, the fourth protective member 32 includes a plurality of third protective units 321 and a plurality of fourth protective units 322, wherein the plurality of third protective units 321 are stacked on one side of the third protective member 31, and the plurality of fourth protective units 322 are stacked on the other side of the third protective member 31. Figure 5 and Figure 6 As shown, multiple third protective units 321 are stacked on the front side of the third protective element 31 and the stacking length of the multiple third protective units 321 is not less than the arrangement length of the multiple third protective elements 31, multiple fourth protective units 322 are stacked on the rear side of the third protective element 31 and the stacking length of the multiple fourth protective units 322 is not less than the arrangement length of the multiple third protective elements 31, the third protective element 31 and the fourth protective element 32 are both special-shaped blocks, and the multiple third protective elements 31 and the multiple fourth protective elements 32 weaken the hydrodynamic effect of the water-facing surface to protect the front and rear sides of the third protective element 31 to prevent the third protective element 31 from being overturned. In addition, in a strong hydrodynamic environment, the third protective unit 321 and the fourth protective unit 322 can be rolled and rearranged to maintain the protective effect.

[0035] In some embodiments, the submarine cable system 100 further includes a detection component (not shown in the figure), which is arranged on one side of the cable 1, and is used to detect the position of the first protective device 2 or the second protective device 3. Specifically, the detection component can be a sonar, an underwater laser scanner, etc. The detection component is arranged in the seabed and located on one side of the cable 1, thereby detecting the distribution of the first protective member 21 through the detection component to ensure the stability and effectiveness of the first protective member 21, and if it is found that the first protective member 21 moves or is improperly positioned, it is adjusted in time, or the distribution of the third protective member 31 and the fourth protective member 32 is detected through the detection component to ensure the stability and effectiveness of the third protective member 31 and the fourth protective member 32, and if it is found that the third protective member 31 and the fourth protective member 32 move or are improperly positioned, it is adjusted in time to ensure the protective performance of the first protective device 2 and the second protective device 3.

[0036] In some embodiments, the first protection device 2 and the second protection device 3 are both multiple, and the multiple first protection devices 2 and the multiple second protection devices 3 are all arranged on the umbilical cable 1 and are arranged at intervals along the axial direction of the umbilical cable 1 (such as Figure 1 As a result, the protection efficiency of the first protection device 2 and the second protection device 3 is improved, and the service life of the submarine cable system 100 is extended.

[0037] The beneficial effects of the submarine cable system 100 of the embodiment of the present invention are as follows: First, the present invention effectively reduces the local flow velocity around the submarine cable 1 by rationally arranging the first protective member 21, changes the fluid flow characteristics, and significantly reduces the scouring effect. The structural design of the first protective member 21 enables it to form a stable stacking system on the seabed, thereby reducing the risk of the cable 1 being suspended, and ensuring that the cable 1 remains safe and stable during long-term operation. In addition, the first protective member 21 can achieve self-stabilization through its gravity and geometric characteristics, and is not easily overturned or displaced by strong hydrodynamic forces, which greatly improves the reliability and durability of the protection system.

[0038] Secondly, the first protective element 21 reduces the requirements for construction accuracy. Compared with the traditional sandbag stacking and concrete block placement process, the placement of the special-shaped blocks of the present invention does not require high precision positioning, and a stable protective structure can be formed by naturally stacking the special-shaped blocks, which greatly simplifies the construction process and shortens the construction period, thereby significantly improving the construction efficiency. In addition, since the shape and layout of the special-shaped blocks are optimized, the manpower and equipment investment required during the construction process are reduced, reducing the overall project cost.

[0039] In addition, the fourth protective member 32 also solves the problem of concrete blocks being easily unstable in a high hydrodynamic environment. As a reusable and stable anti-scour material, the fourth protective member 32 can maintain a long-term protective effect under various marine conditions, thereby improving the economy and sustainability of the project.

[0040] In addition, the fourth protection element 32 has the ability to self-adjust under strong hydrodynamic conditions. Under extreme marine conditions, the fourth protection element 32 can roll and rearrange under the action of water flow, and maintain the stability and protection effect of the structure through self-adaptive adjustment, avoiding the instability and scouring of local areas. This self-adaptive performance enables it to achieve effective protection under harsh conditions such as high flow rate and complex terrain, reflecting its superior engineering adaptability and wide range of applications.

[0041] Finally, the first protective member 21 and the fourth protective member 32 have an adaptive function. When subjected to hydrodynamic force, the first protective member 21 and the fourth protective member 32 can roll and rearrange to maintain effective protection of the pipe and cable by the first protective member 21 and the fourth protective member 32 .

[0042] In summary, the beneficial effects of the present invention are: through the optimized design of the special-shaped blocks (the first protective member 21 and the second protective member 22) and the method of their deployment, the anti-scouring capability of the submarine cable 1 is effectively improved, the construction difficulty and cost are reduced, and the adaptability and stability of the protection system in a strong hydrodynamic environment are improved, ensuring the long-term safety and reliability of the structure. This technical solution shows significant economic benefits and engineering value in the protection project of the submarine cable 1, and has a broad prospect for promotion and application.

[0043] The working process of the submarine cable system 100 of the embodiment of the present invention is as follows: First, the target area to be protected is determined through hydrodynamic analysis and terrain survey. Sonar or submersible equipment is used to obtain seabed terrain data, and the flow velocity distribution is calculated in combination with hydrological data. The positions of the first protection device 2 and the second protection device 3 are determined according to the water flow distribution.

[0044] Preparation before deployment: Positioning: Use GPS or other positioning systems to determine the specific location of the special-shaped blocks.

[0045] Transportation: transport the first protective device 2 to the construction vessel or platform to ensure its safety and stability.

[0046] Tool preparation: prepare cranes, slings, pulley blocks and other laying tools to ensure safe and efficient operation of special-shaped blocks.

[0047] Deployment process of the first protection device 2: Positioning: The first protection element 21 and the second protection element 22 are precisely placed in the target area according to the pre-calculated position. Spacing adjustment: The spacing between the special-shaped blocks is adjusted according to the hydrodynamic environment to ensure the formation of the best protective structure. Usually, a measuring tool such as a laser rangefinder or sonar is used to measure the distance between the special-shaped blocks, and the placement density is 10 first protection elements 21 per square meter.

[0048] Stacking method: The first protective element 21 is stacked by supporting each other through its gravity and surface structure to form an overall stable protective structure. Use a crane or hoist to accurately stack the first protective element 21 in place to ensure the stability of the stacking. The deployment angle is 0° to 45°, which is adjusted according to the direction of the water flow.

[0049] Stability check: After deployment, use a submersible or remotely operated vehicle to check the stability of the first guard 21 to ensure that it will not move under the action of the water flow.

[0050] Monitoring and maintenance: regularly use sonar or other monitoring equipment to check the deployment of the first protection element 21 to ensure its stability and effectiveness. If the first protection element 21 is found to be moved or improperly positioned, make adjustments in a timely manner.

[0051] Preparation before deploying the second protective device 3: Positioning: Determine the placement positions of the third protective member 31 and the fourth protective member 32 to ensure that the two can be effectively combined.

[0052] Transportation: The third protection member 31 and the fourth protection member 32 are transported to the construction vessel or platform.

[0053] Tool preparation: prepare a crane, a sling, a pulley block, and special tools for placing the third protective member 31.

[0054] Deployment process: Placement of the fourth protective element 32: First, place the fourth protective element 32, and adjust the placement spacing and stacking method according to the hydrodynamic environment to ensure that the special-shaped blocks can weaken the hydrodynamic effect of the water-facing surface.

[0055] Placement of the third protective element 31: After the fourth protective element 32 is placed, use a special tool to place the third protective element 31 between the fourth protective element 32 to fill the gap and enhance the overall stability. Combined placement: The third protective element 31 and the fourth protective element 32 are placed in combination to form a stable protection system. Ensure that the third protective element 31 and the fourth protective element 32 are tightly combined to prevent water from flowing through the gap and causing secondary scouring.

[0056] Stability check: Use a submersible or a remotely operated submersible to check the deployment of the third protective member 31 and the fourth protective member 32 to ensure their stability and effectiveness.

[0057] Monitoring and maintenance: Regularly monitor the deployment of the third protection member 31 and the fourth protection member 32 to ensure that they remain stable under strong hydrodynamic conditions. If the third protection member 31 and the fourth protection member 32 are found to be damaged, adjust or replace them in a timely manner.

[0058] Through the detailed description of the above implementation mode, combined with the accompanying drawings, engineering personnel can more clearly execute the deployment of the anti-scour device of the submarine cable 1, thereby ensuring the operability and protection effect of the project.

[0059] The fourth protective members 32 of different sizes are deployed, and the fourth protective members 32 are deployed in the target area, and a protective body is formed by adjusting the deployment spacing and stacking method. The stacking structure of the special-shaped blocks can significantly reduce the flow velocity on both sides of the cable 1 and reduce the influence of the narrow pipe effect based on its deadweight and surface structure stability.

[0060] The third protective member 31 and the fourth protective member 32 are arranged in a row. In areas with high hydrodynamic strength, the third protective member 31 and the fourth protective member 32 are combined. The fourth protective member 32 is used to weaken the hydrodynamic effect on the water-facing surface, and the third protective member 31 further absorbs fluid impact through a flexible design to prevent the structure from being overturned. In a strong hydrodynamic environment, the special-shaped blocks can roll and rearrange to maintain the protective effect. The solution is suitable for anti-scour projects in complex marine environments.

[0061] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A submarine cable system, characterized in that: include: an umbilical cable, the umbilical cable being suitable for being laid in the seabed; a first protection device, the first protection device is suitable for being arranged in a seabed area of ​​a first flow velocity, the first protection device is arranged on the umbilical cable, the first protection device comprises a plurality of first protection members and a second protection member, the plurality of first protection members are special-shaped blocks and are stacked on the umbilical cable, so that the first protection members form a protection layer on the outer peripheral side of the umbilical cable, the second protection member is arranged on one side of the plurality of first protection members, and the second protection member is used to reduce the local flow velocity around the second protection member to form a stable flow field; The second protective device is suitable for being arranged in a seabed area with a second flow velocity, the first flow velocity is less than the second flow velocity, the second protective device is arranged on the tube cable, the second protective device includes a plurality of third protective members and a plurality of fourth protective members, the third protective members are made of flexible materials and are evenly distributed on the tube cable, so that the third protective members form a protective layer on the outer peripheral side of the tube cable, the fourth protective members are special-shaped blocks and are stacked on both sides of the third protective members, and the fourth protective members are used to reduce the hydrodynamic load around the third protective member to avoid the third protective member from being overturned.

2. The submarine cable system according to claim 1, characterized in that: The first protective element has a first spoiler, and the fourth protective element has a second spoiler. One of the first spoiler and the second spoiler is either a protrusion or a groove. The first spoiler and the second spoiler are both used to disrupt the water flow around the tube cable to destroy the continuity of the water flow.

3. The submarine cable system according to claim 2, characterized in that: There are multiple first spoilers, and the multiple first spoilers are arranged on the outer peripheral surface of the first protective element and are spaced apart along the circumference of the first protective element, and / or there are multiple second spoilers, and the multiple second spoilers are arranged on the outer peripheral surface of the fourth protective element and are spaced apart along the circumference of the second protective element.

4. The submarine cable system according to claim 1, characterized in that: At least one of the first protection member and the fourth protection member is in any one of an anvil shape, a three-block shape, a hollow tetrahedron shape and a three-column shape.

5. The submarine cable system according to claim 1, characterized in that: The second protective element includes a first protective unit and a second protective unit, the first protective unit and the second protective unit are respectively arranged on both sides of the first protective element and are relatively spaced apart along the radial direction of the tube and cable, and the first protective unit and the second protective unit are both used to reduce the local flow velocity on both sides of the tube and cable.

6. The submarine cable system according to claim 5, characterized in that: The first protection unit and the second protection unit each include a first protection column, a second protection column, a third protection column and a fourth protection column, the fourth protection column extends in the up-down direction, the first protection column, the second protection column and the third protection column all extend in the horizontal direction and are circumferentially spaced around the fourth protection column, one end of the first protection column, the second protection column and the third protection column are each connected to the fourth protection column, and the first protection member is located between the first protection column and the second protection column.

7. The submarine cable system according to claim 6, characterized in that: The angle between the extension direction of the first protective column and the extension direction of the second protective column is 120°-180°, the first protective column extends in a direction away from the second protective column and is inclined in a direction adjacent to the first protective element, and the second protective column extends in a direction away from the first protective column and is inclined in a direction adjacent to the first protective element.

8. The submarine cable system according to claim 1, characterized in that: The plurality of third protective elements are arranged in a plurality of rows along the axial direction of the umbilical cable, and each row includes a plurality of third protective elements arranged in a radial direction of the umbilical cable, so that the third protective elements form a protective layer on the outer peripheral side of the umbilical cable.

9. The submarine cable system according to claim 1, characterized in that: The fourth protection member includes a plurality of third protection units and a plurality of fourth protection units, the plurality of third protection units are stacked on one side of the third protection member, and the plurality of fourth protection units are stacked on the other side of the third protection member.

10. The submarine cable system according to claim 1, characterized in that: It also includes a detection component, which is arranged on one side of the umbilical cable and is used to detect the position of the first protective device or the second protective device.

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