Submarine cable fixing device and submarine cable fixing method

Abstract

The invention provides a submarine cable fixing device and a submarine cable fixing method. The submarine cable fixing device comprises a fixing clamp, wherein the fixing clamp comprises a first connecting part and a second connecting part; the anchoring base comprises a third connecting part, a conversion structure is arranged on the anchoring base, and the second connecting part is used for being connected with one end of the connecting rope; the first end of the connecting structure is connected with the first connecting part, and the second end of the connecting structure is connected with the third connecting part. According to the technical scheme, the submarine cable fixing device can solve the problems that an existing seabed mooring system mostly adopts a gravity anchor or a suction anchor and other devices, the devices need to be combined with a dynamic submarine cable on a deck in advance and then sink into the seabed together, in the sinking process, the relative positions of the cable and the anchor need to be precisely controlled, and the cable and the anchor are prevented from colliding with each other underwater; and the construction and laying difficulty is high.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable laying, and in particular to a submarine cable fixing device and a submarine cable fixing method. Background Art

[0002] With the transformation and upgrading of the global energy structure, the exploration and application of renewable energy are becoming more and more in-depth. Offshore wind power, especially floating offshore wind power, is widely regarded as the mainstream direction of future offshore energy development because it is not restricted by water depth and can effectively utilize the rich wind resources in the deep sea. The operation and efficiency of floating offshore wind power generation devices directly depend on the stability and reliability of dynamic submarine cables. Dynamic submarine cables not only bear the heavy responsibility of power transmission, but also must withstand the complex force field in the marine environment, including dynamic loads caused by ocean currents, waves, wind and temperature changes. Traditional dynamic submarine cable submarine mooring technology often adopts the "lazy wave configuration", that is, the submarine cable is laid in a wave shape underwater to adapt to and buffer the impact of ocean current changes. This configuration aims to disperse external forces through the natural bending of the submarine cable and reduce direct damage to the cable body.

[0003] To fix dynamic submarine cables, existing submarine mooring systems mostly use devices such as gravity anchors or suction anchors. These anchoring devices are usually pre-combined with the dynamic submarine cables on the deck and then sunk to the seabed together. During the sinking process, the relative position of the cable and the anchor needs to be precisely controlled to prevent the two from colliding with each other underwater, which makes construction and deployment more difficult. Summary of the invention

[0004] The main purpose of the present invention is to provide a submarine cable fixing device and a submarine cable fixing method, which can solve the problem that the existing submarine mooring systems mostly use devices such as gravity anchors or suction anchors, which need to be pre-assembled with dynamic submarine cables on the deck and then sunk to the seabed together. During the sinking process, the relative positions of the cable and the anchor need to be precisely controlled to prevent the two from colliding with each other underwater, resulting in a high difficulty in construction and deployment.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a submarine cable fixing device, comprising: a fixing clamp, which is constructed to be fixedly connected to the submarine cable, and the fixing clamp comprises a first connecting part and a second connecting part; an anchoring base, which comprises a third connecting part, and a conversion structure is arranged on the anchoring base, and the conversion structure is constructed to be able to allow a connecting rope to be wound around and to convert the force of the connecting rope used to pull the anchoring base upward into a force to drag the fixing clamp downward, and the second connecting part is used to be connected to one end of the connecting rope; and a connecting structure, the first end of the connecting structure is connected to the first connecting part, and the second end of the connecting structure is connected to the third connecting part.

[0006] Furthermore, the conversion structure includes a rotating part, which is rotatably arranged relative to the anchor base, and the rotating part is constructed to allow the connecting rope to be wound around and convert the force of the connecting rope used to pull the anchor base upward into a force to drag the fixing clamp downward.

[0007] Furthermore, the third connection part includes a fourth connection part, and the first end of the fourth connection part has a locked state and an unlocked state. When the first end of the fourth connection part is in the locked state, the first end of the fourth connection part can remain connected to the second end of the connecting structure. When the first end of the fourth connection part is in the unlocked state, the first end of the fourth connection part can be disengaged from the second end of the connecting structure, and the second end of the fourth connection part is connected to the third connection part.

[0008] Furthermore, a hanging structure is provided at the second end of the connecting structure, and the fourth connecting part includes a connecting piece. Along the first direction, the connecting piece has a first side and a second side arranged opposite to each other, and the first side and / or the second side are provided with a hooking part and an adjusting component. The hanging structure is constructed to be hooked on the hooking part. When the fourth connecting part is in an unlocked state, a gap is formed between the adjusting component and the hooking part to allow the hanging structure to disengage from the hooking part. When the fourth connecting part is in a locked state, the adjusting component cooperates with the hooking part to close the gap.

[0009] Furthermore, the adjustment component includes a protrusion and an adjustment member, the protrusion and the hook portion are arranged at intervals along the second direction, the adjustment member is installed on the hook portion, and the adjustment member has a first position and a second position. When the adjustment member is in the first position, the adjustment member and the hook portion form a stop limit in the second direction, and the adjustment member cooperates with the hook portion and the protrusion to close the gap. When the adjustment member is in the second position, a gap is formed between the adjustment member and the protrusion.

[0010] Furthermore, the hooking portion includes a mounting structure, the adjusting piece is inserted into the mounting structure, the adjusting piece is rotatably arranged relative to the mounting structure, and the adjusting piece is movably arranged along a second direction relative to the mounting structure, the adjusting piece has a limiting protrusion, and the mounting structure is provided with a guide groove, the guide groove extends along the second direction, when the adjusting piece is in the first position, the limiting protrusion and the bottom of the mounting structure form a stop limit in the second direction, and an end of the adjusting piece away from the protrusion and an end of the mounting structure away from the protrusion form a stop limit in the second direction.

[0011] Furthermore, a limiting groove is provided on the mounting structure, which is located on a side of the guide slot away from the convex portion and is arranged at an angle to the guide slot. When the adjusting member is in the second position, the limiting protrusion is clamped in the limiting groove.

[0012] Furthermore, one end of the protrusion is connected to the connecting piece, and the other end of the protrusion is inclined toward the hook portion on the side close to itself; and / or, a through hole is provided on the protrusion, and when the adjusting piece is in the first position, one end of the adjusting piece close to the protrusion is inserted into the through hole.

[0013] Furthermore, the connection structure includes a connection body and a hanging structure arranged at both ends of the connection body, the hanging structure is a closed annular structure, and the connection body and the hanging structure both include a bearing layer, a first protective layer and a filter layer arranged in sequence from inside to outside.

[0014] Furthermore, a first lubricating layer is arranged between the first protective layer and the filter layer, and the outer periphery of the filter layer is coated with a second lubricating layer; and / or, a wear-resistant sheath is sleeved on the hanging structure, and the wear-resistant sheath covers the hanging position of the hanging structure.

[0015] Furthermore, the connection structure is a closed annular structure, and a binding structure is wound around the middle of the connection structure so that a hanging structure is formed at each end of the connection structure.

[0016] Furthermore, the binding structure includes a second protective layer, a binding layer and an anti-biological attachment layer which are arranged in sequence from the inside to the outside.

[0017] Furthermore, the fixing fixture includes a clamping portion and a rotating portion, the clamping portion is configured to be clamped and fixed with the submarine cable, the rotating portion is sleeved on the clamping portion and can rotate relative to the clamping portion, and the first connecting portion and the second connecting portion are both arranged on the rotating portion.

[0018] Furthermore, the anchoring base also includes a counterweight part, a base body and a base stacked in sequence from top to bottom, the third connecting part is arranged on the base body, and the base includes at least two side panels. When there are more than two side panels, the multiple side panels are connected end to end in sequence.

[0019] According to another aspect of the present invention, a method for fixing a submarine cable is provided. Using the above-mentioned submarine cable fixing device, the method for fixing the submarine cable includes: transporting the anchoring base to a preset position on the seabed; laying the submarine cable and pulling the submarine cable to a pre-connection position; connecting the second end of the connecting structure with the third connecting part.

[0020] Furthermore, the step of pulling the submarine cable to the pre-connection position includes: passing the connecting rope around the conversion structure and connecting with the second connecting part; then pulling the connecting rope upward until the second end of the connecting structure moves to the pre-connection position.

[0021] By applying the technical solution of the present invention, a fixing clamp, an anchoring base and a connecting structure are provided, and a conversion structure is provided on the anchoring base, so that the anchoring base and the submarine cable can be laid out successively. During laying, the anchoring base can be laid out to a preset position on the seabed first, and then the connecting rope can be connected to the second connecting part after passing around the conversion structure, and one end of the connecting rope can be pulled upward, and the conversion structure converts the force used to pull the anchoring base upward into a force for dragging the fixing clamp downward. Since the fixing clamp is fixedly connected to the submarine cable, the submarine cable can be towed to a preset position. When the submarine cable is towed to a position where the second end of the connecting structure can be connected to the third connecting part, the second end of the connecting structure can be connected to the third connecting part, thereby realizing the connection and fixation of the submarine cable to the anchoring base. Through the above-mentioned arrangement, the difficulty of construction and laying can be greatly reduced, and the safety of operation can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 A partial structural schematic diagram of a submarine cable fixing device according to an embodiment of the present invention is shown;

[0024] Figure 2 A partial structural schematic diagram of a submarine cable fixing device according to an embodiment of the present invention is shown;

[0025] Figure 3 A partial structural schematic diagram of a submarine cable fixing device according to an embodiment of the present invention is shown;

[0026] Figure 4 A partial structural schematic diagram of an anchoring base according to an embodiment of the present invention is shown;

[0027] Figure 5 A partial structural schematic diagram of an anchoring base according to an embodiment of the present invention is shown;

[0028] Figure 6 A partial structural schematic diagram of an anchoring base according to an embodiment of the present invention is shown;

[0029] Figure 7 A partial structural schematic diagram of a submarine cable fixing device according to an embodiment of the present invention is shown;

[0030] Figure 8 A schematic structural diagram of a fixing fixture according to an embodiment of the present invention is shown;

[0031] Fig. 9 An exploded view of a fixing fixture according to an embodiment of the present invention is shown;

[0032] Fig.10A schematic structural diagram showing a connection structure of an embodiment of the present invention;

[0033] Fig.11 A partial structural schematic diagram showing a connection structure of an embodiment of the present invention (wherein a portion of the connection body is opened);

[0034] Fig.12 A partial structural schematic diagram of a connection structure of an embodiment of the present invention is shown (wherein a portion of the binding structure is opened);

[0035] Fig.13 A schematic diagram of the process of fixing a submarine cable using the method for fixing a submarine cable of the present invention is shown (a process of transporting an anchoring base to a preset position on the seabed);

[0036] Fig.14 A schematic diagram of the process of fixing a submarine cable using the method for fixing a submarine cable of the present invention is shown (the process of pulling the submarine cable to the pre-connection position, before the second end of the connection structure is connected to the anchor base);

[0037] Fig.15 A schematic diagram of the process of fixing a submarine cable using the method for fixing a submarine cable of the present invention is shown (after the submarine cable is pulled to the pre-connection position and the second end of the connection structure is connected to the anchor base);

[0038] Fig.16 A schematic diagram of the process of fixing a submarine cable using the method for fixing a submarine cable of the present invention is shown (after the connection between the connecting rope and the second connecting part is released);

[0039] Fig.17 A flow chart showing a method for fixing a submarine cable according to an embodiment of the present invention is shown.

[0040] The above drawings include the following reference numerals:

[0041] 10. Fixing fixture; 11. First connecting part; 12. Second connecting part; 13. Clamping part; 131. Haversian clamping split; 132. Connecting hole; 14. Rotating part; 141. Haversian rotating split; 20. Submarine cable; 30. Anchor base; 31. Third connecting part; 32. Counterweight part; 33. Base body; 34. Base; 40. Conversion structure; 41. Rotating part; 42. Mounting frame; 43. Rotating shaft; 50. Connecting rope; 60. Connecting structure; 62. Fourth connecting part; 621. Connecting piece; 6211. First connecting section; 6212. Second connecting section; 622. Hooking part; 623. Adjusting group Part; 624, convex part; 6241, through hole; 625, adjusting part; 6251, limiting protrusion; 6252, guide slide groove; 6253, limiting groove; 626, installation structure; 627, operating ring; 63, hanging structure; 631, wear-resistant sleeve; 641, bearing layer; 642, first protective layer; 643, filtering layer; 644, first lubricating layer; 645, second lubricating layer; 70, bundling structure; 71, bundling layer; 72, second protective layer; 73, anti-biological attachment layer; 80, shackle; 90, connecting ring; 100, bending reinforcement; 101, bolt; 102, construction ship; 103, winch. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] See also Figures 1 to 12 As shown, the present invention provides a submarine cable fixing device, which includes: a fixing clamp 10, which is configured to be fixedly connected to a submarine cable 20, and the fixing clamp 10 includes a first connecting portion 11 and a second connecting portion 12; an anchoring base 30, which includes a third connecting portion 31, and a conversion structure 40 is arranged on the anchoring base 30, and the conversion structure 40 is configured to be able to allow a connecting rope 50 to be wound around and convert the force of the connecting rope 50 used to pull the anchoring base 30 upward into a force to drag the fixing clamp 10 downward, and the second connecting portion 12 is used to be connected to one end of the connecting rope 50; and a connecting structure 60, the first end of the connecting structure 60 is connected to the first connecting portion 11, and the second end of the connecting structure 60 is connected to the third connecting portion 31.

[0044] In this embodiment, the fixing fixture 10 is used to be fixedly connected to the position where the submarine cable 20 needs to be moored, and the fixing fixture 10 can withstand the axial tension of the submarine cable 20 without slipping. Before laying the submarine cable 20, the first end of the connecting structure 60 is connected to the first connecting part 11 to install the connecting structure 60 on the fixing fixture 10. The second connecting part 12 is used to connect with the connecting rope 50 (for example, a steel wire rope). The traditional construction method of anchoring the submarine cable to the seabed usually requires that the two be pre-connected on the deck and then sunk to the seabed together, which not only increases the complexity and difficulty of the construction, but may also cause collision between the two during the sinking process, causing damage to the submarine cable. The anchor base 30 of the present application is provided with a conversion structure 40, which can realize the sequential deployment of the anchor base 30 and the submarine cable 20. When deploying, the anchor base 30 can be deployed to the preset position on the seabed first, and then the connecting rope 50 is connected to the second connecting part 12 after bypassing the conversion structure 40, and one end of the connecting rope 50 is pulled upward. The conversion structure 40 converts the force used to pull the anchor base 30 upward into the force to drag the fixing clamp 10 downward. Since the fixing clamp 10 is fixedly connected to the submarine cable 20, the submarine cable 20 can be towed to the preset position. When the submarine cable 20 is towed to the position where the second end of the connecting structure 60 can be connected to the third connecting part 31, the second end of the connecting structure 60 can be connected to the third connecting part 31, thereby realizing the connection and fixation of the submarine cable 20 and the anchor base 30. Through the above arrangement, the difficulty of construction deployment can be greatly reduced and the operation safety can be improved.

[0045] It should be noted that the number of the connection structures 60 can be set according to actual needs.

[0046] In one embodiment, the first connection portion 11 , the second connection portion 12 and the third connection portion 31 are all ear plates.

[0047] In one embodiment, the connection structure 60 is a tether, which can realize a soft connection between the anchor base 30 and the submarine cable 20. Compared with the hard connection between the submarine cable and the seabed anchor in the prior art, it can disperse part of the stress originally concentrated on the anchor base 30 to the submarine cable 20, avoiding the sudden change of curvature from static to dynamic of the submarine cable 20, making the line shape of the submarine cable 20 softer, and improving the fatigue resistance of the submarine cable 20. In addition, it is also helpful to disperse the stress at the fixed point, reduce the failure rate caused by the stress concentration at the fixed point, and ensure the long-term stable operation of offshore facilities such as offshore wind power, offshore photovoltaic and wave power generation devices.

[0048] In one embodiment, the tether is made of polymer composite fiber. Compared with metal ropes, polymer fiber has excellent fatigue resistance, is light in weight and is corrosion-resistant.

[0049] See also Figures 1 to 12As shown, in one embodiment of the present invention, the conversion structure 40 includes a rotating part 41, which is rotatably arranged relative to the anchor base 30, and the rotating part 41 is constructed to allow the connecting rope 50 to be wound around and convert the force of the connecting rope 50 for pulling the anchor base 30 upward into a force for dragging the fixing clamp 10 downward.

[0050] Through the above arrangement, the force of the connection rope 50 for pulling up the anchor base 30 can be converted into a force for dragging the fixing clamp 10 downward.

[0051] In one embodiment, the rotating part 41 may be a fixed pulley or a round rod.

[0052] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the conversion structure 40 further includes a mounting frame 42 and a rotating shaft 43 . The mounting frame 42 is fixedly mounted on the anchor base 30 , and the rotating portion 41 is rotatably mounted on the mounting frame 42 via the rotating shaft 43 .

[0053] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the third connection part 31 includes a fourth connection part 62, and the first end of the fourth connection part 62 has a locked state and an unlocked state. When the first end of the fourth connection part 62 is in the locked state, the first end of the fourth connection part 62 can remain connected to the second end of the connecting structure 60. When the first end of the fourth connection part 62 is in the unlocked state, the first end of the fourth connection part 62 can be disengaged from the second end of the connecting structure 60, and the second end of the fourth connection part 62 is connected to the third connection part 31.

[0054] In this embodiment, the fourth connection part 62 has a locked state and an unlocked state, which can realize the connection and disconnection between the connection structure 60 and the anchor base 30. The unlocked state of the fourth connection part 62 makes it possible to make a precise connection in an underwater environment, reduces the difficulty and risk of launching the submarine cable 20 and the anchor base 30 together during the construction process, and improves the construction efficiency. In addition, the unlocked state of the fourth connection part 62 is convenient for divers or underwater robots to operate, and there is no need to keep the relative position of the connection structure 60 and the anchor base 30 fixed under complex water flow conditions, which reduces the time and labor cost of the construction operation. When the fourth connection part 62 is in a locked state, it can achieve a stable connection between the fourth connection part 62 and the connection structure 60, and then achieve a stable connection between the anchor base 30 and the submarine cable 20.

[0055] See also Figures 1 to 12As shown, in one embodiment of the present invention, a hanging structure 63 is provided at the second end of the connecting structure 60, and the fourth connecting portion 62 includes a connecting member 621. Along the first direction, the connecting member 621 has a first side and a second side that are relatively arranged, and the first side and / or the second side are provided with a hooking portion 622 and an adjusting component 623. The hanging structure 63 is constructed to be hooked on the hooking portion 622. When the fourth connecting portion 62 is in an unlocked state, a gap is formed between the adjusting component 623 and the hooking portion 622 to allow the hanging structure 63 to disengage from the hooking portion 622. When the fourth connecting portion 62 is in a locked state, the adjusting component 623 cooperates with the hooking portion 622 to close the gap.

[0056] In this embodiment, the connecting member 621 is a T-shaped structure, that is, it includes a first connecting section 6211 and a second connecting section 6212. The first direction refers to Figure 4 The length extension direction of the first connecting section 6211, the second direction refers to Figure 4 The inclined extension direction of the middle mounting structure 626. Through the above arrangement, the fourth connecting portion 62 can be switched between the locked state and the unlocked state.

[0057] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the adjustment component 623 includes a protrusion 624 and an adjustment member 625, the protrusion 624 and the hook portion 622 are arranged at intervals along the second direction, the adjustment member 625 is installed on the hook portion 622, and the adjustment member 625 has a first position and a second position. When the adjustment member 625 is in the first position, the adjustment member 625 and the hook portion 622 form a stop limit in the second direction, and the adjustment member 625 cooperates with the hook portion 622 and the protrusion 624 to close the gap. When the adjustment member 625 is in the second position, a gap is formed between the adjustment member 625 and the protrusion 624.

[0058] In this embodiment, when the adjusting member 625 is in the first position, the adjusting member 625 and the hook portion 622 form a stop limit in the second direction to prevent the adjusting member 625 from being separated from the hook portion 622. At the same time, the adjusting member 625 cooperates with the convex portion 624 and the hook portion 622 to close the gap to prevent the hanging structure 63 from being separated from the hook portion 622. When the adjusting member 625 is in the second position, the gap formed between the adjusting member 625 and the convex portion 624 allows the hanging structure 63 to be separated from the hook portion 622.

[0059] See also Figures 1 to 12As shown, in one embodiment of the present invention, the hook portion 622 includes a mounting structure 626, the adjusting member 625 is inserted into the mounting structure 626, the adjusting member 625 is rotatably arranged relative to the mounting structure 626, and the adjusting member 625 is movably arranged along the second direction relative to the mounting structure 626, the adjusting member 625 has a limiting protrusion 6251, and the mounting structure 626 is provided with a guide groove 6252, and the guide groove 6252 extends along the second direction. When the adjusting member 625 is in the first position, the limiting protrusion 6251 and the bottom of the mounting structure 626 form a stop limit in the second direction, and the end of the adjusting member 625 away from the protrusion 624 and the end of the mounting structure 626 away from the protrusion 624 form a stop limit in the second direction.

[0060] In this embodiment, the adjusting member 625 is rotatably arranged relative to the mounting structure 626, and the adjusting member 625 is movably arranged relative to the mounting structure 626 along the second direction, so that the adjusting member 625 can be switched between the first position and the second position. When the adjusting member 625 is in the first position, the limiting protrusion 6251 and the bottom of the mounting structure 626 form a stop limit in the second direction, preventing the adjusting member 625 from moving along the second direction from the mounting structure 626. Figure 4 At the same time, one end of the adjusting member 625 away from the protrusion 624 and one end of the mounting structure 626 away from the protrusion 624 form a stop limit in the second direction to prevent the adjusting member 625 from moving away from the protrusion 624 along the second direction. Figure 4 The bottom of the middle mounting structure 626 is out of the way.

[0061] In order to switch the adjustment member 625 from the first position to the second position, it can be rotated by external force (such as manual operation or mechanical drive) so that the limit protrusion 6251 does not form a stop with the bottom of the mounting structure 626. At this time, the limit protrusion 6251 can slide in the guide groove 6252 along the length extension direction of the guide groove 6252 in the direction away from the protrusion 624 until a gap is formed between the protrusion 624, thereby realizing the conversion of the adjustment member 625 from the first position to the second position.

[0062] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the third connecting portion 31 also includes two shackles 80, a connecting ring 90 and an ear plate, one of the two shackles 80 is connected to an end of the connecting member 621 away from the connecting structure 60, the connecting ring 90 is located between the two shackles 80, and the two shackles 80 are connected by the connecting ring 90, the ear plate is fixedly mounted on the anchor base 30, and the other of the two shackles 80 is connected to the ear plate.

[0063] See also Figures 1 to 12As shown, in one embodiment of the present invention, a limiting groove 6253 is further provided on the mounting structure 626. The limiting groove 6253 is located on the side of the guide groove 6252 away from the protrusion 624 and is arranged at an angle to the guide groove 6252. When the adjustment member 625 is in the second position, the limiting protrusion 6251 is clamped in the limiting groove 6253.

[0064] In this embodiment, the limiting groove 6253 and the guide slide groove 6252 are arranged at an angle. When the adjusting member 625 is in the second position, the limiting protrusion 6251 is clamped in the limiting groove 6253, so that the adjusting member 625 can be kept in the first position. In addition, the setting of the limiting groove 6253 simplifies the switching process of the adjusting member 625 from the first position to the second position. The operator only needs to push the adjusting member 625 to slide along the guide slide groove 6252 until the limiting protrusion 6251 is automatically clamped into the limiting groove 6253, which not only improves the convenience of operation, but also reduces the operation time.

[0065] See also Figures 1 to 12 As shown, in one embodiment of the present invention, one end of the protrusion 624 is connected to the connecting member 621, and the other end of the protrusion 624 is inclined toward the hooking portion 622 on the side where the protrusion 624 is located.

[0066] In this embodiment, the inclined setting of the protrusion 624 can guide the hanging structure 63, making it easier for the hanging structure 63 to find and hook onto the hooking portion 622, especially in underwater operations with limited vision, which can improve the connection success rate between the connecting structure 60 and the anchor base 30.

[0067] See also Figures 1 to 12 As shown, in one embodiment of the present invention, a through hole 6241 is provided on the protrusion 624 , and when the adjusting member 625 is in the first position, one end of the adjusting member 625 close to the protrusion 624 is inserted into the through hole 6241 .

[0068] In this embodiment, when the adjusting member 625 is in the first position, one end of the adjusting member 625 close to the protrusion 624 is inserted into the through hole 6241. At this time, the inner wall of the through hole 6241 can limit the adjusting member 625 in the circumferential direction of the adjusting member 625 to prevent the adjusting member 625 from shaking significantly when subjected to external force, thereby ensuring the structural stability of the fourth connecting portion 62.

[0069] like Figure 4 As shown, in one embodiment of the present invention, an operating ring 627 is provided at one end of the adjusting member 625 away from the protrusion 624 to facilitate lifting the adjusting member 625 .

[0070] See also Figures 1 to 12As shown, in one embodiment of the present invention, the connection structure 60 includes a connection body and a hanging structure 63 arranged at both ends of the connection body, the hanging structure 63 is a closed annular structure, and the connection body and the hanging structure 63 both include a bearing layer 641, a first protective layer 642 and a filter layer 643 arranged in sequence from the inside to the outside.

[0071] In this embodiment, a hanging structure 63 is provided at both ends of the connection body. The hanging structure 63 is a closed annular structure, wherein one hanging structure 63 is used to connect to the first connection part 11, and the other hanging structure 63 is used to hook on the hooking part 622. The connection body and the hanging structure 63 both include a bearing layer 641, a first protective layer 642 and a filter layer 643 arranged from the inside to the outside. The bearing layer 641, as the core part of the connection structure 60, directly bears the tension between the submarine cable 20 and the anchor base 30. The first protective layer 642 and the filter layer 643 provide different levels of protection respectively. The first protective layer 642 is used to protect the bearing layer 641 from damage by the external environment (such as corrosion by seawater). The filter layer 643 further prevents seabed mud from entering the interior of the connection structure 60, and protects the bearing layer 641 from mud wear and corrosion. As can be seen from the above, the connection structure 60 of the present application has the characteristics of anti-mud, anti-fatigue, friction resistance, and seawater corrosion resistance.

[0072] In one embodiment, the bearing layer 641 is made of aramid fiber, the first protective layer 642 is made of polyethylene, and the filter layer 643 is a one-layer or multi-layer mesh structure woven from polymer fiber materials, so that the connection structure 60 is lightweight.

[0073] See also Figures 1 to 12 As shown, in one embodiment of the present invention, a first lubricating layer 644 is disposed between the first protective layer 642 and the filter layer 643 , and the outer periphery of the filter layer 643 is coated with a second lubricating layer 645 .

[0074] In this embodiment, the provision of the first lubricating layer 644 and the second lubricating layer 645 can provide additional lubrication effect, reduce friction and wear of the connecting structure 60 during use, and extend the service life of the connecting structure 60.

[0075] In one embodiment, the first lubricating layer 644 is made of polyamide fiber coated with silicone oil, and the second lubricating layer 645 is made of polyamide fiber.

[0076] See also Figures 1 to 12 As shown, in one embodiment of the present invention, a wear-resistant sheath 631 is provided on the hanging structure 63 , and the wear-resistant sheath 631 covers the hanging position of the hanging structure 63 .

[0077] In this embodiment, the hanging position refers to the part of the hanging structure 63 hooked on the hook portion 622. Through the above arrangement, the friction damage between the hanging position of the hanging structure 63 and the hook portion 622 can be reduced, and the service life of the hanging structure 63 can be extended. At the same time, the wear-resistant sheath 631 can provide additional support and protection, and reduce fatigue damage of the hanging structure 63.

[0078] In one embodiment, the wear-resistant sheath 631 is coated with a polyurethane layer, and the wear-resistant sheath 631 is made of a mixture of high modulus polyethylene fiber and polyester fiber.

[0079] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the connection structure 60 is a closed annular structure, and a binding structure 70 is wound around the middle of the connection structure 60 so that a hanging structure 63 is formed at each end of the connection structure 60 .

[0080] In this embodiment, the connection structure 60 is a tether, which is an integrated structure and a closed annular structure. The middle part of the connection structure 60 is wrapped with a binding structure 70, that is, the middle part of the connection structure 60 is two strands of rope. By binding in the middle part of the connection structure 60, the deformation of the connection structure 60 can be effectively limited to prevent it from over-extension under high load or extreme conditions. At the same time, the setting of the binding structure 70 can form a hanging structure 63 at each end of the connection structure 60, so as to realize the connection of the connection structure 60 with the fixing fixture 10 and the anchor base 30.

[0081] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the binding structure 70 includes a second protective layer 72, a binding layer 71 and an anti-biological attachment layer 73 which are arranged in sequence from the inside to the outside.

[0082] In this embodiment, the second protective layer 72 can provide mechanical protection to prevent physical damage caused by external forces (such as dragging, collision). The binding layer 71 is tightly wrapped around the connection structure 60. The anti-biological attachment layer 73 is located at the outermost layer and can effectively prevent marine organisms such as barnacles and shellfish from attaching to the connection structure 60.

[0083] Specifically, the anti-biological attachment layer 73 is a polytetrafluoroethylene coating.

[0084] In one embodiment, the binding layer 71 is made of aramid fiber, and the second protective layer 72 is made of polyethylene.

[0085] See also Figures 1 to 12As shown, in one embodiment of the present invention, the fixing fixture 10 includes a clamping portion 13 and a rotating portion 14, the clamping portion 13 is configured to be clamped and fixed with the submarine cable 20, the rotating portion 14 is sleeved on the clamping portion 13 and can rotate relative to the clamping portion 13, and the first connecting portion 11 and the second connecting portion 12 are both arranged on the rotating portion 14.

[0086] In this embodiment, the rotating portion 14 is sleeved on the clamping portion 13 and can rotate relative to the clamping portion 13, so that the submarine cable 20 can be naturally twisted when subjected to a lateral external force, thereby avoiding excessive concentration of stress at the fixed point and extending the service life of the submarine cable 20. At the same time, when the submarine cable 20 swings left and right under the action of a lateral water flow, the first connecting portion 11 can always face the direction in which the connecting structure 60 is tightened.

[0087] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the clamping portion 13 includes two Haversian clamping splits 131, and the two Haversian clamping splits 131 are connected to each other by bolts 101 on one side thereof, and the rotating portion 14 includes two Haversian rotating splits 141, and the two Haversian rotating splits 141 are connected to each other by bolts 101 on one side thereof.

[0088] like Fig. 9 As shown, in one embodiment of the present invention, a plurality of connection holes 132 are provided on the Haversian clamping body 131 for passing bolts to achieve connection with the bending reinforcement member 100 .

[0089] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the anchoring base 30 also includes a counterweight portion 32, a base body 33 and a base 34 stacked in sequence from top to bottom, the third connecting portion 31 is arranged on the base body 33, and the base 34 includes at least two side panels. When there are more than two side panels, the multiple side panels are connected end to end in sequence.

[0090] In this embodiment, when the anchor base 30 reaches the preset position on the seabed, the side plates can be inserted into the soil of the seabed to increase the grip of the anchor base 30 and improve the stability of the anchor base 30, so that it can resist the lateral, longitudinal and rotational forces transmitted by the submarine cable 20. The counterweight 32 is arranged above the anchor base 30 to ensure that the anchor base 30 can reach the seabed quickly and stably during the sinking process, and by adjusting the weight of the counterweight 32, it can adapt to seabeds of different depths and geological conditions.

[0091] In one embodiment, the base body 33 is a steel structure.

[0092] In one embodiment, the counterweight part 32 is a container welded from steel, and concrete is poured inside to increase the counterweight. For heavy underwater anchoring, the counterweight part 32 can also be made of exposed concrete after the mold-cast reinforced concrete is demoulded.

[0093] See also Figures 1 to 12 As shown, in one embodiment of the present invention, there are two counterweight parts 32, and the two counterweight parts 32 are arranged at intervals along the third direction. The third direction refers to Figure 2 The third connection part 31 and the conversion structure 40 are arranged at intervals along the length direction of the counterweight part 32 , and the third connection part 31 and the conversion structure 40 are both located between two counterweight parts 32 .

[0094] See also Figures 1 to 12 As shown, in one embodiment of the present invention, there are two bases 34, which are spaced apart along the third direction, and each base 34 includes four side panels, which are connected end to end in sequence to form a rectangular parallelepiped without a top surface and a bottom surface. When the anchor base 30 moves upward, it can provide a certain suction force.

[0095] See also Figures 1 to 12 As shown, in one embodiment of the present invention, the submarine cable fixing device also includes a bending reinforcement member 100. A bending reinforcement member 100 is provided at both ends of the fixing clamp 10, which can prevent the submarine cable 20 at the fixing clamp 10 from deviating to the same side under the action of the water flow when the water flow is large, resulting in a sudden change in curvature of the submarine cable 20, thereby causing excessive bending of the submarine cable 20.

[0096] In one embodiment, the submarine cable fixing device also includes an anti-wear protective tube, which is made of polyurethane material and has the characteristics of wear resistance. The anti-wear protective tube is composed of a section of Haversian semicircular tubes, each section is connected by a buckle, and the anti-wear protective tube is wrapped on the submarine cable 20 by a binding belt. Compared with the prior art, the submarine cable fixing device of the present application effectively solves the emergency concentration and local repeated bending problems of the submarine cable 20 at the fixed place of the seabed through the coordinated work of the anchor base 30, the connection structure 60, the fixing clamp 10, the bending reinforcement 100 and the anti-wear protective tube, delays the fatigue damage of the submarine cable 20, and thus ensures the normal power generation of the wind farm. The submarine cable fixing device of the present application has a reasonable structural design, convenient construction, and easy implementation. It not only improves the operating stability of the submarine cable 20, but also extends the service life of the submarine cable 20.

[0097] like Fig.17 As shown, the present invention provides a method for fixing a submarine cable. Using the above-mentioned submarine cable fixing device, the submarine cable fixing method includes: transporting the anchor base 30 to a preset position on the seabed; laying the submarine cable 20, and pulling the submarine cable 20 to a pre-connection position; connecting the second end of the connecting structure 60 to the third connecting part 31.

[0098] In this embodiment, first, the preset position of the seabed is determined by ocean surveying technology. The position should take into account factors such as the seabed topography, water flow conditions, and the laying path of the submarine cable 20 to ensure that the anchor base 30 can be firmly anchored on the seabed. Fig.13 As shown, a dedicated construction ship 102 is used to precisely place the anchor base 30 at a preset position through a lifting device. Then the submarine cable 20 is laid. The submarine cable 20 usually starts from an offshore wind power platform and is slowly placed into the sea by the cable laying equipment on the construction ship 102. At the same time, the laying path of the submarine cable 20 should follow the pre-planned route to avoid conflicts with other submarine facilities. When the submarine cable 20 approaches the pre-connection position, a diver or an underwater robot (depending on the operating depth and conditions) connects the second end of the connecting structure 60 to the third connecting portion 31.

[0099] See also Figures 14 to 16 As shown, in one embodiment of the present invention, the step of pulling the submarine cable 20 to the pre-connection position includes: allowing the connecting rope 50 to pass around the conversion structure 40 and then connect to the second connecting part 12; then pulling the connecting rope 50 upward until the second end of the connecting structure 60 moves to the pre-connection position.

[0100] In this embodiment, one end of the connecting rope 50 is connected to the winch 103 on the construction ship 102, and the other end is bypassed by the conversion structure 40 and connected to the second connection part 12. The winch 103 on the construction ship 102 is started, and the connecting rope 50 is slowly pulled upward. Under the action of the conversion structure 40, the force of pulling the connecting rope 50 will be converted into the force of dragging the fixing clamp 10 to the seabed, thereby driving the submarine cable 20 to move to the preset connection position. As the connecting rope 50 is pulled, the second end of the connecting structure 60 gradually approaches the anchor base 30. When the second end of the connecting structure 60 reaches the pre-connection position, that is, the position where it can be connected to the anchor base 30, the pulling of the connecting rope 50 is stopped. The diver or underwater robot connects the second end of the connecting structure 60 to the third connection part 31.

[0101] In one embodiment, the steps after connecting the second end of the connecting structure 60 to the third connecting part 31 include: after ensuring that the connection is firm, detaching the connecting rope 50 from the second connecting part 12 on the fixing clamp 10, and then retrieving the connecting rope 50 by controlling the winch 103 on the construction vessel 102 until it is completely removed from the conversion structure 40.

[0102] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: a fixing clamp, an anchoring base and a connecting structure are provided, and a conversion structure is provided on the anchoring base, so that the anchoring base and the submarine cable can be laid out successively. During laying, the anchoring base can be laid out to a preset position on the seabed first, and then the connecting rope can be connected to the second connecting part after bypassing the conversion structure, and one end of the connecting rope can be pulled upward. The conversion structure converts the force used to pull the anchoring base upward into a force to drag the fixing clamp downward. Since the fixing clamp is fixedly connected to the submarine cable, the submarine cable can be towed to a preset position. When the submarine cable is towed to a position where the second end of the connecting structure can be connected to the third connecting part, the second end of the connecting structure can be connected to the third connecting part, thereby realizing the connection and fixation of the submarine cable and the anchoring base. Through the above-mentioned arrangement, the difficulty of construction and laying can be greatly reduced, and the safety of operation can be improved.

[0103] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0104] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A submarine cable fixing device, characterized in that: include: A fixing fixture (10) configured to be fixedly connected to a submarine cable (20), the fixing fixture (10) comprising a first connecting portion (11) and a second connecting portion (12); An anchor base (30) comprises a third connecting portion (31), a conversion structure (40) is arranged on the anchor base (30), the conversion structure (40) is configured to allow a connecting rope (50) to be wound around and to convert the force of the connecting rope (50) used to pull the anchor base (30) upward into a force used to drag the fixing fixture (10) downward, and the second connecting portion (12) is used to be connected to one end of the connecting rope (50); as well as A connecting structure (60), wherein a first end of the connecting structure (60) is connected to the first connecting portion (11), and a second end of the connecting structure (60) is connected to the third connecting portion (31).

2. The submarine cable fixing device according to claim 1, characterized in that: The conversion structure (40) includes a rotating part (41), which is rotatably arranged relative to the anchor base (30), and the rotating part (41) is constructed to allow the connecting rope (50) to be wound around and to convert the force of the connecting rope (50) used to pull the anchor base (30) upward into a force that drags the fixing clamp (10) downward.

3. The submarine cable fixing device according to claim 1 or 2, characterized in that: The third connection part (31) includes a fourth connection part (62), and the first end of the fourth connection part (62) has a locked state and an unlocked state. When the first end of the fourth connection part (62) is in the locked state, the first end of the fourth connection part (62) can remain connected to the second end of the connection structure (60); when the first end of the fourth connection part (62) is in the unlocked state, the first end of the fourth connection part (62) can be disengaged from the second end of the connection structure (60), and the second end of the fourth connection part (62) is connected to the third connection part (31).

4. The submarine cable fixing device according to claim 3, characterized in that: The second end of the connecting structure (60) is provided with a hanging structure (63), and the fourth connecting part (62) includes a connecting member (621). Along the first direction, the connecting member (621) has a first side and a second side that are arranged opposite to each other, and the first side and / or the second side are provided with a hooking portion (622) and an adjusting component (623). The hanging structure (63) is constructed to be hooked on the hooking portion (622). When the fourth connecting part (62) is in the unlocked state, a gap is formed between the adjusting component (623) and the hooking portion (622) to allow the hanging structure (63) to be disengaged from the hooking portion (622). When the fourth connecting part (62) is in the locked state, the adjusting component (623) cooperates with the hooking portion (622) to close the gap.

5. The submarine cable fixing device according to claim 4, characterized in that: The adjusting component (623) comprises a convex portion (624) and an adjusting member (625), wherein the convex portion (624) and the hook portion (622) are arranged at intervals along the second direction, and the adjusting member (625) is mounted on the hook portion (622). The adjusting member (625) has a first position and a second position. When the adjusting member (625) is in the first position, the adjusting member (625) and the hook portion (622) form a stop limit in the second direction. The adjusting member (625) cooperates with the hook portion (622) and the convex portion (624) to close the gap. When the adjusting member (625) is in the second position, the gap is formed between the adjusting member (625) and the convex portion (624).

6. The submarine cable fixing device according to claim 5, characterized in that: The hook portion (622) includes a mounting structure (626), the adjusting member (625) is inserted into the mounting structure (626), the adjusting member (625) is rotatably arranged relative to the mounting structure (626), and the adjusting member (625) is movably arranged relative to the mounting structure (626) along the second direction, the adjusting member (625) has a limiting protrusion (6251), and the mounting structure (626) is provided with a guide groove (6252), and the guide groove (6252) extends along the second direction. When the adjusting member (625) is in the first position, the limiting protrusion (6251) and the bottom of the mounting structure (626) form a stop limit in the second direction, and the end of the adjusting member (625) away from the protrusion (624) and the end of the mounting structure (626) away from the protrusion (624) form a stop limit in the second direction.

7. The submarine cable fixing device according to claim 6, characterized in that: A limiting groove (6253) is also provided on the mounting structure (626). The limiting groove (6253) is located on a side of the guide groove (6252) away from the protrusion (624) and is arranged at an angle to the guide groove (6252). When the adjustment member (625) is in the second position, the limiting protrusion (6251) is clamped in the limiting groove (6253).

8. The submarine cable fixing device according to claim 5, characterized in that: One end of the protrusion (624) is connected to the connecting member (621), and the other end of the protrusion (624) is inclined toward the hooking portion (622) on the side close to itself; and / or, a through hole (6241) is provided on the protrusion (624), and when the adjusting member (625) is in the first position, one end of the adjusting member (625) close to the protrusion (624) is inserted into the through hole (6241).

9. The submarine cable fixing device according to claim 1, characterized in that: The connection structure (60) comprises a connection body and hanging structures (63) arranged at both ends of the connection body, the hanging structure (63) is a closed annular structure, and the connection body and the hanging structure (63) both comprise a bearing layer (641), a first protective layer (642), and a filter layer (643) arranged in sequence from the inside to the outside.

10. The submarine cable fixing device according to claim 9, characterized in that: A first lubricating layer (644) is provided between the first protective layer (642) and the filter layer (643), and the outer periphery of the filter layer (643) is coated with a second lubricating layer (645); and / or a wear-resistant sleeve (631) is provided on the hanging structure (63), and the wear-resistant sleeve (631) covers the hanging position of the hanging structure (63).

11. The submarine cable fixing device according to claim 1, characterized in that: The connection structure (60) is a closed annular structure, and a binding structure (70) is wound around the middle of the connection structure (60), so that a hanging structure (63) is formed at each end of the connection structure (60).

12. The submarine cable fixing device according to claim 11, characterized in that: The binding structure (70) comprises a second protective layer (72), a binding layer (71) and an anti-biological attachment layer (73) which are arranged in sequence from the inside to the outside.

13. The submarine cable fixing device according to claim 1 or 2, characterized in that: The fixing fixture (10) comprises a clamping portion (13) and a rotating portion (14); the clamping portion (13) is configured to be clamped and fixed to the submarine cable (20); the rotating portion (14) is sleeved on the clamping portion (13) and is capable of rotating relative to the clamping portion (13); and the first connecting portion (11) and the second connecting portion (12) are both arranged on the rotating portion (14).

14. The submarine cable fixing device according to claim 1 or 2, characterized in that: The anchoring base (30) further comprises a counterweight portion (32), a base body (33) and a base (34) stacked in sequence from top to bottom, the third connecting portion (31) is arranged on the base body (33), and the base (34) comprises at least two side panels. When there are more than two side panels, the plurality of side panels are connected end to end in sequence.

15. A method for fixing a submarine cable, characterized in that: Utilizing the submarine cable fixing device according to any one of claims 1 to 14, the submarine cable fixing method comprises: transporting the anchoring base (30) to a preset position on the seabed; Laying the submarine cable (20), and pulling the submarine cable (20) to a pre-connection position; The second end of the connection structure (60) is connected to the third connection portion (31).

16. The method for fixing a submarine cable according to claim 15, characterized in that: The step of pulling the submarine cable (20) to the pre-connection position comprises: The connecting rope (50) is connected to the second connecting portion (12) after passing through the conversion structure (40); The connecting rope (50) is then pulled upward until the second end of the connecting structure (60) moves to the pre-connection position.

Images