Underwater submarine cable fixing structure

Abstract

The utility model relates to an underwater submarine cable fixing structure which comprises steel pipe piles, steel pipe pile connecting assemblies, supporting steel pipes, supporting steel pipe connecting assemblies, a bottom plate and submarine cable connecting assemblies. The upper end face of the bottom plate is connected with the submarine cable connecting assembly, and the lower end face is connected with the supporting steel pipe connecting assembly. The supporting steel pipe connecting assembly is connected to the supporting steel pipe, the supporting steel pipe is connected to the steel pipe pile connecting assembly, and the steel pipe pile connecting assembly is connected to the steel pipe pile. The underwater submarine cable fixing structure provided by the utility model aims to overcome the defects in the prior art, is beneficial to supporting and fixing the underwater submarine cable, and reduces the swinging of the submarine cable.

Description

Technical Field

[0001] The utility model relates to an underwater submarine cable fixing structure. Background Art

[0002] As a new energy industry with great potential and vigor, offshore wind power is an important direction for the development of renewable energy under the background of "3060 dual carbon". The existence of offshore wind turbine foundations will significantly change the flow field around the structure, especially the large-diameter single pile foundation. Downwelling and horseshoe-shaped vortices will appear in front of the piles, and the streamlines on the pile side will shrink along the direction of the water flow. The tail vortex behind the pile will continue to generate and fall off. The continuous shedding of the tail vortex will carry some sediment and transport it downstream, eventually forming obvious local scour pits around the structure. The scour problem of offshore wind turbine foundations is becoming increasingly prominent, especially in the eastern sea area, which is affected by the large current velocity, and many single pile foundations are severely scoured. Local scour will cause the submarine cables around the offshore wind turbine foundations to be suspended in the air, deviating from the design state of being buried in the soil, and thus affecting the stress state of the submarine cables.

[0003] According to statistics from international insurance agencies, submarine cables, which account for about 9% of the total investment in offshore wind power projects, are the most frequently encountered link in offshore wind power failures, accounting for 75% to 80% of insurance claims. According to rough statistics, the cost of repairing submarine cables by global offshore wind farm operators has exceeded RMB 8.5 billion per year, and this figure will continue to rise in the future. Therefore, it is necessary to deal with the positions where the submarine cables are suspended at a high height due to local scouring.

[0004] There are two main treatment measures at present. One is to use anti-scouring materials to fill to the original design elevation within a certain diameter range around the offshore wind turbine foundation where local scouring is serious, so as to restore the suspended height of the submarine cable to the original design state; the other is to drive 1-2 steel pipe piles along the direction of the cable to support and fix the submarine cable with a large suspended height to reduce the swing of the submarine cable. The existing submarine cable fixing structure is mainly for the fixing bracket of the submarine cable on water or on land, and there is no fixing structure for the underwater submarine cable, which leads to the lack of underwater fixing technology for the submarine cable. Therefore, an underwater submarine cable fixing structure is proposed to address the above problems. Utility Model Content

[0005] The utility model aims to overcome the existing defects and provide an underwater submarine cable fixing structure, which is beneficial to the support and fixation of the underwater submarine cable and reduces the swing of the submarine cable.

[0006] The technical solution to achieve the above object is: an underwater submarine cable fixing structure, including a steel pipe pile, a steel pipe pile connection assembly, a supporting steel pipe, a supporting steel pipe connection assembly, a bottom plate and a submarine cable connection assembly;

[0007] The upper end surface of the bottom plate is connected to the submarine cable connection assembly, and the lower end surface is connected to the supporting steel pipe connection assembly; the supporting steel pipe connection assembly is connected to the supporting steel pipe, the supporting steel pipe is connected to the steel pipe pile connection assembly, and the steel pipe pile connection assembly is connected to the steel pipe pile.

[0008] Preferably, the submarine cable connection assembly is composed of two groups respectively connected to the two ends of the upper end surface of the base plate; the submarine cable connection assembly includes a U-shaped ring, two holding plates, four fixing plates and two first nuts; the two holding plates are connected to the inner side of the U-shaped ring, the submarine cable is located between the two holding plates, the lower end of the U-shaped ring is connected to the base plate through two first nuts, and the four fixing plates are connected between one of the holding plates and the upper end surface of the base plate.

[0009] Preferably, the supporting steel pipe connection assembly is composed of two groups respectively connected to the two ends of the lower end surface of the base plate; the supporting steel pipe connection assembly includes a second clamp, the inner side of the second clamp is connected to the supporting steel pipe, and the two ends of the second clamp are connected to the base plate through the first bolt.

[0010] Preferably, the steel pipe pile connection assembly includes two first hoops, wherein the back side of one of the first hoops is connected to one end of the supporting steel pipe, and the two first hoops are connected to the steel pipe pile via a plurality of second bolts.

[0011] Preferably, a pile body corbel steel plate is connected to each of the upper and lower parts of the two first hoops on the side wall of the steel pipe pile.

[0012] Preferably, a sealing plate is connected to the end of the supporting steel pipe away from the first clamping hoop to restrict the second clamping hoop.

[0013] Preferably, both ends of the U-shaped ring are provided with threads.

[0014] The beneficial effects of the utility model are as follows: the underwater submarine cable fixing structure is mostly fixed with clamps and bolts, the structural strength meets the design requirements, and it is convenient for underwater installation. The supporting steel pipe is connected to the steel pipe pile by the clamp, and the angle and height of the supporting steel pipe can be adjusted according to the direction and suspension height of the submarine cable. The submarine cable is fixed to the supporting steel pipe by a U-shaped ring and a pad, which can be completed by underwater operation by a diver, which is convenient for construction, is conducive to the support and fixation of the underwater submarine cable, and reduces the swing of the submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the underwater submarine cable fixing structure of the utility model;

[0016] Figure 2 It is a top view of the submarine cable connection assembly of the utility model;

[0017] Figure 3It is a front view of the submarine cable connection assembly of the utility model;

[0018] Figure 4 It is a side view of the submarine cable connection assembly of the utility model;

[0019] Figure 5 This is a detailed diagram of the utility model submarine cable bending limiter;

[0020] Figure 6 This is a detailed view of the holding plate of the submarine cable bending limiter of the utility model;

[0021] Figure 7 It is a detail diagram of the fixing plate of the utility model.

[0022] In the figure: 1. steel pipe pile; 2. first clamp; 3. pile body corbel steel plate; 4. supporting steel pipe; 5. sealing plate; 6. U-shaped ring; 7. second clamp; 8. fixing plate; 9. bottom plate; 10. clamp plate; 11. first nut; 12. first bolt; 13. second bolt. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-7 As shown, an underwater submarine cable fixing structure includes a steel pipe pile 1, a steel pipe pile connection assembly, a supporting steel pipe 4, a supporting steel pipe connection assembly, a base plate 9 and a submarine cable connection assembly; the upper end surface of the base plate 9 is connected to the submarine cable connection assembly, and the lower end surface is connected to the supporting steel pipe connection assembly; the supporting steel pipe connection assembly is connected to the supporting steel pipe 4, the supporting steel pipe 4 is connected to the steel pipe pile connection assembly, and the steel pipe pile connection assembly is connected to the steel pipe pile 1.

[0026] like Figure 2 , 3As shown in , 4, 5, 6, and 7, the submarine cable connection assembly is composed of two groups connected to the two ends of the upper end surface of the bottom plate 9 respectively; the submarine cable connection assembly includes a U-shaped ring 6, two holding plates 10, four fixing plates 8, and two first nuts 11; the two holding plates 10 are connected to the inner side of the U-shaped ring 6, the submarine cable is located between the two holding plates 10, the lower end of the U-shaped ring 6 is connected to the bottom plate 9 through two first nuts 11, and the four fixing plates 8 are connected between one of the holding plates 10 and the upper end surface of the bottom plate 9. Threads are provided at both ends of the U-shaped ring 6.

[0027] like Figure 1 , 4 As shown, the supporting steel pipe connection assembly is composed of two groups, which are respectively connected to the two ends of the lower end surface of the bottom plate 9; the supporting steel pipe connection assembly includes a second clamp 7, the inner side of the second clamp 7 is connected to the supporting steel pipe 4, and the two ends of the second clamp 7 are connected to the bottom plate 9 through the first bolt 12. The end of the supporting steel pipe 4 away from the first clamp 2 is connected to a sealing plate 5 for limiting the second clamp 7.

[0028] like Figure 1 As shown, the steel pipe pile connection assembly includes two first hoops 2, wherein the back of one of the first hoops 2 is connected to one end of the supporting steel pipe 4, and the two first hoops 2 are connected to the steel pipe pile 1 through a plurality of second bolts 13. A pile body corbel steel plate 3 is connected to the upper and lower parts of the two first hoops 2 on the side wall of the steel pipe pile 1, respectively, to limit the positions of the two first hoops 2.

[0029] Specifically, during installation, an anchoring steel pipe pile 1 is driven at a certain distance from the outer edge of the trumpet mouth of the submarine cable protection pipe of the offshore wind turbine foundation. Before sinking the pile, the steel pipe pile connection assembly, the supporting steel pipe 4, the supporting steel pipe connection assembly, the bottom plate 9 and the submarine cable connection assembly are connected in sequence. The steel pipe pile connection assembly is not tightly connected to the steel pipe pile 1 to facilitate subsequent rotation. When the pile sinking begins, the steel pipe pile 1 first sinks by its own weight. After the sinking stops, the diver checks the pile position and verticality again. The position of the steel pipe pile 1 must be close to the submarine cable, but not close to it to prevent damage to the submarine cable. If it does not meet the requirements, the crane ship pulls up the steel pipe pile and repositions it, and then starts the vibrating hammer to sink the pile. During the pile sinking process, the diver pays real-time attention to the position of the supporting steel pipe 4 and the submarine cable underwater to avoid scratching the submarine cable. After the pile sinking is completed, the divers use the crane to adjust and position the height of the steel pipe pile connection assembly according to the direction of the submarine cable underwater, and preliminarily tighten the steel pipe pile connection assembly. After the submarine cable reaches the predetermined position, the divers connect the submarine cable to the bottom plate 9 through the steel pipe pile connection assembly.

[0030] Specifically, the diameter of the steel pipe pile 1 is 0.3-0.8m, and the height above the seabed surface is determined according to the height of the submarine cable. The top of the steel pipe pile 1 is connected to the supporting steel pipe 4 through two first clamps 2, and the supporting steel pipe 4 is about 1.0m away from the top of the steel pipe pile. In order to facilitate the supporting steel pipe 4 to follow the direction of the submarine cable, it is connected to the steel pipe pile 1 through two first clamps 2, which is convenient for rotation. The steel pipe pile is provided with a pile body corbel steel plate 3 to limit the position of the two first clamps 2. The free section of the top of the steel pipe pile 1 of about 0.5m is used for vibrating hammer sinking piles. The bottom plate 9 is connected to the supporting steel pipe 4 through the second clamp 7, and one end of the supporting steel pipe 4 is connected to a sealing plate 5 to limit the movement of the second clamp 7; the submarine cable runs through the two clamps 10, the lower end of the U-shaped ring 6 is connected to the bottom plate 9 through two first nuts 11, and four fixing plates 8 are connected between one of the clamps 10 and the upper end surface of the bottom plate 9, so as to achieve the effect of fixing the submarine cable.

[0031] This underwater cable fixing structure is mostly fixed with clamps and bolts, the structural strength meets the design requirements, and is convenient for underwater installation. The support steel pipe 4 is connected to the steel pipe pile 1 through a clamp, and the angle and height of the support steel pipe 4 can be adjusted according to the direction and suspension height of the submarine cable. The submarine cable is fixed to the support steel pipe 4 through a U-shaped ring and a pad, which can be completed by a diver's underwater operation, which is convenient for construction, is conducive to the support and fixation of the underwater submarine cable, and reduces the swing of the submarine cable.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An underwater submarine cable fixing structure, It is characterized in that It comprises a steel pipe pile (1), a steel pipe pile connection assembly, a supporting steel pipe (4), a supporting steel pipe connection assembly, a bottom plate (9) and a submarine cable connection assembly; The upper end surface of the bottom plate (9) is connected to the submarine cable connection assembly, and the lower end surface is connected to the supporting steel pipe connection assembly; the supporting steel pipe connection assembly is connected to the supporting steel pipe (4), the supporting steel pipe (4) is connected to the steel pipe pile connection assembly, and the steel pipe pile connection assembly is connected to the steel pipe pile (1).

2. The underwater submarine cable fixing structure according to claim 1, It is characterized in that The submarine cable connection assembly is composed of two groups, which are respectively connected to the two ends of the upper end surface of the bottom plate (9); the submarine cable connection assembly comprises a U-shaped ring (6), two holding plates (10), four fixing plates (8) and two first nuts (11); the two holding plates (10) are connected to the inner side of the U-shaped ring (6), the submarine cable is located between the two holding plates (10), the lower end of the U-shaped ring (6) is connected to the bottom plate (9) through the two first nuts (11), and the four fixing plates (8) are connected between one of the holding plates (10) and the upper end surface of the bottom plate (9).

3. The underwater submarine cable fixing structure according to claim 1, It is characterized in that The supporting steel pipe connection assembly consists of two groups respectively connected to the two ends of the lower end surface of the base plate (9); the supporting steel pipe connection assembly comprises a second clamp (7), the inner side of the second clamp (7) is connected to the supporting steel pipe (4), and the two ends of the second clamp (7) are connected to the base plate (9) via a first bolt (12).

4. The underwater cable fixing structure according to claim 3, It is characterized in that The steel pipe pile connection assembly comprises two first hoops (2), wherein the back side of one of the first hoops (2) is connected to one end of the supporting steel pipe (4), and the two first hoops (2) are connected to the steel pipe pile (1) via a plurality of second bolts (13).

5. The underwater cable fixing structure according to claim 4, It is characterized in that A pile body corbel steel plate (3) is respectively connected to the upper and lower parts of the two first hoops (2) on the side wall of the steel pipe pile (1).

6. The underwater cable fixing structure according to claim 4, It is characterized in that One end of the supporting steel pipe (4) facing away from the first clamp (2) is connected to a sealing plate (5) for restricting the second clamp (7).

7. The underwater submarine cable fixing structure according to claim 2, It is characterized in that The two ends of the U-shaped ring (6) are provided with threads.

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