Submarine cable protection device

Abstract

The utility model discloses a submarine cable protection device. The submarine cable protection device comprises a plurality of pile casing assemblies which are connected in a nested mode. Each pile casing assembly comprises a sleeve, nested connection structures connected to the two ends of the sleeve and an annular flow guide structure arranged on the outer surface of the sleeve, and all the sleeves and the nested connection structures are of hollow structures. Each nested connection structure comprises a mother end and a son end, and the mother ends and the son ends connected with the same sleeve are used for being connected with the corresponding son ends and mother ends connected with different sleeves in a nested mode; each mother end is composed of two symmetrical semispherical mother end units, and each son end is composed of two symmetrical semispherical son end units; each annular flow guide structure comprises an annular base and a plurality of flow guide plates with spaced protrusions, the annular bases are arranged on the outer surfaces of the corresponding sleeves in a sleeving mode, the flow guide plates are fixed to the corresponding areas of the annular bases, the annular bases are of openable structures, and the flow guide plates are connected to the corresponding annular bases in a central symmetry mode. The utility model aims to realize comprehensive protection of the suspended section of the submarine cable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marine cable, especially to a marine cable protection device and its installation method. BACKGROUND

[0002] Currently, submarine cables are the main way of power transmission for offshore wind farms, directly affecting the stable operation of offshore wind power. In order to protect the marine cable, most of the cables are laid under the seabed, which can effectively protect the marine cable from damage by ocean current load and marine organisms. The marine cable near the wind power foundation is connected to the wind power foundation through a bending pipe, effectively limiting the bending of the marine cable. However, the transition section of the cable from the end of the bending pipe to the seabed usually forms a suspended part. In complex offshore environments, especially in nearshore areas, the ocean current and surge are strong, resulting in the formation of scour pits around the pile and the marine cable, which gradually expand under the long-term action of the ocean current, and the suspended section of the marine cable is extended. This not only increases the risk of excessive bending of the marine cable, but also causes the suspended submarine cable to produce alternating vortex shedding under the action of the incoming flow, which may cause vortex-induced vibration and mechanical damage, seriously threatening the safety of the marine cable. In addition, the marine cable exposed to the seabed may collide with the seabed rock under the action of the ocean current load, damaging the outer protective layer of the marine cable and eventually leading to the failure of the marine cable.

[0003] The existing marine cable protection measures can be divided into direct protection and indirect protection. Direct protection includes marine cable bending protection, such as the use of bend limiters, anti-bending pipes, and supports to prevent excessive bending of the marine cable; another type is outer protection, which prevents damage to the outer layer of the marine cable by using protective pipes, covering, or burying. However, the covering and burying methods cannot be applied to the suspended section near the marine cable foundation. Although the traditional bending protection device can prevent excessive bending to some extent, it does not consider the limiting problem of the marine cable in the pipe, and the marine cable may still swing in the bending pipe, causing friction with the pipe wall and damaging the outer layer. In addition, due to the complexity of the seabed conditions, once the anti-bending device is damaged, maintenance is difficult. Indirect protection prevents the extension of the suspended section by solving the problem of local scour, thereby avoiding excessive bending of the marine cable or vortex-induced vibration. Traditional methods include filling the scour pits near the pile with riprap and sandbags to reduce the length of the suspended section and indirectly protect the marine cable. However, these methods are difficult to construct, and the protection effect is not stable, which may pose a risk of secondary scour. The hollowing effect of the water flow may cause the filling material to settle, so regular inspection and reinforcement are required, increasing the maintenance cost in the later stage, and may have a negative impact on the surrounding ecological environment.

[0004] The utility model discloses a submarine cable protection device, which comprises a jacket unit, the jacket unit comprises a sleeve, an internal buffer assembly and an external buffer assembly; the sleeve is used for passing through the submarine cable; the internal buffer assembly comprises a plurality of internal buffer units, which are arranged in a circumferential interval along the inner circumferential wall of the sleeve; the internal buffer unit comprises a first flexible protection strip, which extends along the axial direction and is installed on the inner circumferential wall of the sleeve; the external buffer assembly comprises a connecting rope and a plurality of second flexible protection strips; the connecting rope is arranged on the outer periphery of the sleeve; the plurality of flexible protection strips are connected through the connecting rope; and the plurality of flexible protection strips are arranged in a circumferential interval along the sleeve; and the flexible protection strip extends along the axial line. Although the device can protect the submarine cable from collision and vortex-induced vibration, the application position is limited, and the suspended section near the wind power foundation cannot be comprehensively protected. Utility model content

[0005] The main purpose of the utility model is to provide a submarine cable protection device and an installation method thereof, which aims to solve the technical problem of poor comprehensive protection of the existing submarine cable protection device for the suspended section of the submarine cable.

[0006] To achieve the above-mentioned purpose, the utility model provides a submarine cable protection device, which comprises a plurality of jacket assembly units connected in a nested mode.

[0007] Each jacket assembly unit comprises a sleeve, a nested connection structure connected to both ends of the sleeve and an annular flow guide structure arranged on the outer surface of the sleeve; each of the sleeve and the nested connection structure is a hollow structure and is used for passing through the submarine cable along the axial direction.

[0008] Each nested connection structure comprises a female end and a male end; one female end and one male end are connected to both ends of the sleeve respectively; and the female end and the male end connected to the same sleeve are used for being nested with the corresponding male end and female end connected to different sleeves.

[0009] Each female end is composed of two symmetrical half-spherical female end units; and each male end is composed of two symmetrical half-spherical male end units.

[0010] Each annular flow guide structure comprises an annular base and a plurality of flow guide plates with interval protrusions; the annular base is sleeved on the outer surface of the corresponding sleeve; each flow guide plate is fixed on the corresponding area of the annular base; the annular base is a structure that can be opened and closed; and each flow guide plate is connected to the corresponding annular base in a central symmetry mode.

[0011] Optionally, a plurality of grooves are arranged on the inner surface of each sleeve; and a corresponding buffer strip is embedded in each groove.

[0012] Optionally, each groove is T-shaped.

[0013] Optionally, each buffer strip is a flexible buffer strip.

[0014] Optionally, each buffer strip is composed of a waterproof protective sleeve and a compression spring.

[0015] Optionally, each sleeve is composed of two symmetrical half protective shells.

[0016] Optionally, each annular base is composed of two symmetrical annular base half structures.

[0017] Optionally, each half-spherical female end unit is provided with two symmetrical connecting protrusions in the corresponding area, and each connecting protrusion is provided with at least two through first fixing holes for symmetrically fixing two half-spherical female end units.

[0018] Optionally, each annular flow guide structure includes an annular base and three flow guide plates with interval protrusions.

[0019] Optionally, the outer diameter of each male end is smaller than the inner diameter of the corresponding nested female end.

[0020] Beneficial effects:

[0021] (1) The device adopts a plurality of nested protection cylinder assemblies, which can be extended according to actual needs, and the male end is nested in the corresponding female end, which can limit the bending degree between the protection cylinder assemblies, and realize the anti-bending protection of the submarine cable.

[0022] (2) The annular flow guide structure is driven to rotate by the flow guide plates to guide the flow, reduce the effect of the flow on the submarine cable, and effectively inhibit the regularity of the vortex of the wake field of the submarine cable, thereby avoiding the occurrence of vortex-induced vibration and relieving the fatigue failure of the submarine cable. The hinge connection design enables the annular flow guide structure to be installed more quickly underwater and enables the flexible replacement of accessories, thereby reducing the construction difficulty and the later operation and maintenance cost.

[0023] (3) The flow guide plate is made of high-elastic polyurethane material, which has excellent wear resistance, tear resistance and corrosion resistance, can further improve the service life, and effectively controls the cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without creative labor.

[0025] Figure 1 is a side view of a single protection cylinder assembly of an embodiment of the submarine cable protection device of the present application;

[0026] Figure 2 Fig. 1 is a structural schematic view of a half-protective shell shown in the utility model; Figure 1 Fig. 2 is a structural schematic view of a half-protective shell shown in the utility model;

[0027] Figure 3 Fig. 3 is a structural schematic view of a buffer strip shown in the utility model; Figure 2 Fig. 4 is a structural schematic view of a half-protective shell shown in the utility model;

[0028] Figure 4 Fig. 5 is a structural schematic view of a buffer strip shown in the utility model; Figure 2 Fig. 6 is a structural schematic view of a ring base shown in the utility model;

[0029] Figure 5 Fig. 7 is a structural schematic view of a ring base shown in the utility model; Figure 1 Fig. 8 is a structural schematic view of a ring base shown in the utility model;

[0030] Figure 6 Fig. 9 is a top view of multiple pile casing assemblies connected in an embodiment of the utility model of a submarine cable protection device.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Reference Name Reference Name 1 Sleeve 2 Annular flow guide structure 3 Nested connection structure 4 Buffer strip 11 Half protective shell 12 First fixing hole 13 Second fixing hole 14 Third fixing hole 15 Groove 21 Annular base 22 Flow guide plate 23 Hinge 24 First mounting hole 31 Hemispherical female end unit 32 Hemispherical male end unit 33 Connecting protrusion 34 Second mounting hole 41 Waterproof protective sleeve 42 Compression spring 3301 Through hole

[0033] The implementation, functional features and advantages of the utility model will be further described in combination with the embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] It should be noted that all the directional indications (such as up, down, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0036] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0037] And, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on that a person having ordinary skill in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.

[0038] Referring to Figures 1-6 The utility model provides a kind of embodiment of submarine cable protection device, the device includes multiple nested connection's casing assembly;Wherein, single casing assembly includes sleeve 1, the nested connection structure 3 connected at the both ends of sleeve 1 and the annular flow guide structure 2 placed on the outer surface of sleeve 1, each sleeve 1, nested connection structure 3 are hollow structure and for submarine cable passes through along the axial direction.Each nested connection structure 3 includes female end and child end, the both ends of sleeve 1 are respectively connected with one female end and one child end, the female end and the child end connected with the same sleeve 1 are all used to be nested with the corresponding child end and female end connected with different sleeve 1, and then using the setting of successively nested connection, casing assembly can be extended according to actual demand.

[0039] Further, as Figures 1-2 Each female end is composed of two symmetrical hemispherical female end units 31, each child end is composed of two symmetrical hemispherical child end units 32, and each hemispherical female end unit 31 is provided with two symmetrical connecting protrusions 33, each connecting protrusion 33 is provided with at least two through holes 3301, and each through hole 3301 is used to symmetrically fix two hemispherical female end units 31.Each child end is slightly smaller than the inner diameter of the corresponding nested connection female end, so that the child end can be nested in the corresponding female end, the bending degree between casing assemblies can be limited, and the protection of submarine cable from bending can be realized. And specifically, as Figure 6 Further, the number of casing assemblies can be increased by the mutual engagement of hemispherical female end units 31 and hemispherical child end units 32, the extension of the protection device can be realized, and the cost can be effectively controlled.

[0040] Further, as Figure 5 Each annular flow guide structure 2 includes an annular base 21 and a plurality of flow guide plates 22 with spacing protrusions, the annular base 21 is sleeved on the outer surface of the corresponding sleeve 1, and each flow guide plate 22 is fixed on the corresponding area of the annular base 21. Preferably, one end of each flow guide plate 22 is centrally symmetrically connected to the corresponding annular base 21; more preferably, each annular flow guide structure 2 includes an openable annular base 21 and three flow guide plates 22 with spacing protrusions. In actual application, the annular flow guide device can drive the casing assembly to rotate under the action of water flow, which can disturb the wake field of the submarine cable, reduce the fluid force on the surface of the submarine cable, inhibit the regularity of the vortex release of the wake field of the submarine cable, and thus avoid the occurrence of vortex-induced vibration, thereby relieving the fatigue failure of the submarine cable.

[0041] Further, as shown in the figure, the inner surface of each sleeve 1 is also provided with a plurality of grooves 15, and each groove 15 is embedded with a corresponding buffer strip 4. Preferably, each groove 15 is T-shaped, and each buffer strip 4 is a flexible buffer strip. The flexible buffer strip further achieves the anti-collision and anti-friction effect of the submarine cable in the sleeve. Figures 2-3

[0042] Further, as shown in the figure, Figure 4 Each buffer strip 4 includes a waterproof protective sleeve 41 and a plurality of compression springs 42 arranged at equal intervals in the waterproof protective sleeve 41, which effectively improves the anti-collision and anti-friction effect of the submarine cable in the sleeve.

[0043] Further, as shown in the figure, Figure 3 Each sleeve 1 is composed of two symmetrical half protective shells 11, and each half protective shell 11 is provided with a plurality of first fixing holes 12, second fixing holes 13, and third fixing holes 14. The first fixing holes 12 are arranged at both ends of the edge of the half protective shell 11 and are used for connecting and fixing the two half protective shells 11. The second fixing holes 13 are arranged at both ends of the two half protective shells 11 and are used for corresponding connection and fixing with the corresponding half spherical female end unit 31 and half spherical male end unit 32. The third fixing holes 14 are arranged on the side surface of the half protective shell 11 and are used for connection and fixing with the annular flow guide structure 2. Preferably, the half protective shell 11 is made of metal material.

[0044] Further, as shown in the figure, Figure 5 Each annular base 21 is composed of two symmetrical annular base half structures, and the two annular base half structures are fixed together by a hinge 23. The hinge connection arrangement makes it easier to install and replace the accessories underwater, reduces the construction difficulty, and reduces the later operation and maintenance cost. Preferably, each flow guide plate 22 is made of high-elastic polyurethane material, so that the annular flow guide structure also has excellent wear resistance, tear resistance, and corrosion resistance, which can further improve the service life and further control the cost.

[0045] Further, each annular base 21 is also provided with a plurality of first mounting holes 24, which are used for corresponding with the third fixing holes 14 arranged on the side surface of the half protective shell 11. The third fixing holes 14 and the first mounting holes 24 realize the connection and fixing of the annular base 21 and the half protective shell 11.

[0046] Further, as shown in the figure, Figure 2 ​As shown, the end of the hemispherical female end unit 31 is also provided with a second mounting hole 34, which is used to correspond to the corresponding second fixing hole 13 on the half protective shell 11, and the fixing of the hemispherical female end unit 31 and the half protective shell 11 is realized through the second mounting hole 34 and the second fixing hole 13; Similarly, the hemispherical female end unit 32 will also be provided with a corresponding third mounting hole, and the fixing of the hemispherical female end unit 32 and the half protective shell 11 is realized through the third mounting hole and the second fixing hole 13 on the other end of the half protective shell 11.

[0047] In addition, in order to better illustrate the submarine cable protection device of the utility model, the following is described in detail by a specific installation method, which comprises the following steps:

[0048] Step 1, the flexible buffer strip 4 is embedded in the inner groove 15 from both ends of the half protective shell 1, and the two hemispherical female end units 31 and the hemispherical female end units 32 of the nested connection structure are fixed at both ends of the sleeve 1 respectively, forming two symmetrical half units of the casing assembly;

[0049] Step 2, place the submarine cable in the half protective shell and close the two half units of the casing assembly, then fix the female end outside of the sleeve and the nested structure symmetrically;

[0050] Step 3, fix the annular flow guide structure on the sleeve to complete the installation of a single casing assembly;

[0051] Step 4, when multiple casing assemblies need to be installed, obtain a new section of two half units of the casing assembly, and continue to axially pass the original submarine cable through the new section of two half units of the casing assembly, then nest the hemispherical female end unit 31 in the new section of two half units of the casing assembly on the other end of the casing assembly, and fix the female end outside of the sleeve 1 and the nested structure 3 symmetrically and install the corresponding annular flow guide structure 2, repeat the operation of the new section until the preset length is reached, to complete the nested connection of multiple casing assemblies.

[0052] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A submarine cable protection device, characterized in that, The device comprises a plurality of nested connection casing assemblies; Each casing assembly comprises a sleeve (1), a nested connection structure (3) connected to both ends of the sleeve (1), and an annular flow guide structure (2) arranged on the outer surface of the sleeve (1), each of the sleeve (1) and the nested connection structure (3) is a hollow structure and is used for the submarine cable to pass through in the axial direction; Each nested connection structure (3) comprises a female end and a male end, one female end and one male end are connected to both ends of the sleeve (1), and the female end and the male end connected to the same sleeve (1) are used for nested connection with the corresponding male end and female end connected to different sleeves (1); Each female end is composed of two symmetrical half-spherical female end units (31), and each male end is composed of two symmetrical half-spherical male end units (32); Each annular flow guide structure (2) comprises an annular base (21) and a plurality of flow guide plates (22) with interval protrusions, the annular base (21) is sleeved on the outer surface of the corresponding sleeve (1), and each flow guide plate (22) is fixed on the corresponding area of the annular base (21), the annular base (21) is a structure that can be opened and closed, and each flow guide plate (22) is centrally symmetrically connected to the corresponding annular base (21).

2. A submarine cable protection device according to claim 1, characterised in that, The inner surface of each sleeve (1) is further provided with a plurality of grooves (15), and a corresponding buffer strip (4) is embedded in each groove (15).

3. A submarine cable protection device according to claim 2, characterised in that, Each groove (15) is T-shaped.

4. A submarine cable protection device according to claim 2, characterised in that, Each buffer strip (4) is a flexible buffer strip.

5. A submarine cable protection device according to claim 2, characterised in that, Each buffer strip (4) is composed of a waterproof protective sleeve (41) and a compression spring (42).

6. A submarine cable protection arrangement according to any one of claims 1 to 5, characterised in that, Each sleeve (1) is composed of two symmetrical half protective shells (11).

7. A submarine cable protection device according to claim 6, characterised in that, Each annular base (21) is composed of two symmetrical annular base half structures.

8. A submarine cable protection arrangement according to claim 1, characterised in that, The corresponding area of each half-spherical female end unit (31) is provided with two symmetrical connection protrusions, each connection protrusion is provided with at least two penetrating first fixing holes (33), and each first fixing hole (33) is used for symmetrically fixing the two half-spherical female end units (31).

9. A submarine cable protection arrangement according to claim 1, characterised in that, Each annular flow guide structure (2) comprises an annular base (21) and three flow guide plates (22) with interval protrusions.

10. A submarine cable protection arrangement according to any one of claims 7 to 9, characterised in that, The outer diameter of each male end is smaller than the inner diameter of the corresponding nested connection female end.

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