Submarine cable protection device suitable for shallow sea

Abstract

The utility model provides a submarine cable protection device suitable for shallow sea, which comprises a plurality of protection modules sequentially arranged on a submarine cable along the extension direction of the submarine cable, and each protection module comprises a fixing unit, a buoyancy unit and a counterweight unit; the fixing unit is connected with a submarine cable; the buoyancy unit is connected to one end of the fixing unit close to the sea surface and used for driving the submarine cable to break away from the seabed; the counterweight unit is connected to the end, close to the seabed, of the fixing unit and used for preventing the submarine cable from displacing under the impact of sea waves. According to the utility model, the buoyancy unit is designed to drive the submarine cable to be separated from the seabed, so that friction generated by direct contact between the submarine cable and the seabed is effectively avoided, and the risk of damage to the submarine cable due to friction is greatly reduced. The buoyancy unit not only provides necessary buoyancy, but also ensures the stable suspension state of the submarine cable underwater, and prolongs the service life of the submarine cable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to offshore new energy engineering field, concretely relates to a submarine cable protection device suitable for shallow sea. BACKGROUND

[0002] In the marine environment, especially in the shallow sea area, due to the violent action of surge and tidal current, the laid submarine cable (submarine cable) faces the challenge of huge environmental load. The traditional protection measure is usually to bury the submarine cable in the seabed, in order to reduce the direct influence of the external environment on the submarine cable through the protection of the soil.

[0003] However, when the submarine cable is subjected to long-term environmental load, it will deform and displace, which may increase the friction between the submarine cable and the seabed, and further damage the protective layer of the submarine cable. Once the protective layer of the submarine cable is damaged, the internal conductor and insulating material will be directly exposed to the harsh marine environment, greatly increasing the risk of submarine cable failure. SUMMARY

[0004] To solve the above problems, the utility model provides a submarine cable protection device suitable for shallow sea.

[0005] The utility model provides a submarine cable protection device suitable for shallow sea, comprising: a plurality of protection modules arranged in sequence on the submarine cable along the extension direction of the submarine cable, each protection module comprising a fixing unit, a buoyancy unit and a counterweight unit;

[0006] The fixing unit is connected with the submarine cable;

[0007] The buoyancy unit is connected at one end of the fixing unit close to the sea surface, for driving the submarine cable to separate from the seabed;

[0008] The counterweight unit is connected at one end of the fixing unit close to the seabed, for preventing the submarine cable from displacing under the impact of sea waves.

[0009] Preferably, the counterweight unit comprises two gravity sub-units;

[0010] The two gravity sub-units are symmetrically connected at one end of the fixing unit close to the seabed, for preventing the submarine cable from swinging left and right under the impact of sea waves.

[0011] Preferably, the counterweight unit further comprises a first connecting sub-unit;

[0012] The first connecting sub-unit is connected between the two gravity sub-units, for balancing the load borne by the two gravity sub-units.

[0013] Preferably, the counterweight unit further comprises a bending prevention sub-unit;

[0014] The anti-bending sub-unit is arranged on the first connecting sub-unit, and is used for preventing the first connecting sub-unit from being bent and damaged due to bending and flexing.

[0015] Preferably, the fixing unit comprises a collar sub-unit and a second connecting sub-unit.

[0016] The collar sub-unit is sleeved on the submarine cable, and an inner diameter of the collar sub-unit matches an outer diameter of the submarine cable.

[0017] One end of the second connecting sub-unit is connected with the collar sub-unit, and the other end is connected with two gravity sub-units respectively.

[0018] Preferably, the collar sub-unit comprises a plurality of half-rings.

[0019] The plurality of half-rings are detachably connected to form a collar sub-unit.

[0020] Preferably, the detachable connection is any one of a clamp connection, a bolt connection, a mortise and tenon connection and a pin shaft connection.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] (1) The utility model discloses a floating unit is arranged to drive the submarine cable to separate from the seabed, and the friction between the submarine cable and the seabed due to direct contact is effectively avoided, thereby greatly reducing the risk of damage of the submarine cable due to friction.

[0023] (2) The utility model discloses a counterweight unit is arranged to provide additional stability for the submarine cable.

[0024] (3) The utility model discloses two gravity sub-units are symmetrically arranged to further enhance the stability of the structure.

[0025] (4) The utility model discloses through setting up the anti-bending subunit on the first connecting subunit, has improved the overall strength and rigidity of structure, and the anti-bending subunit can effectively prevent the first connecting subunit from bending and buckling damage when being subjected to external force, thereby ensuring the integrity and stability of the whole protection structure, so that the utility model not only improves the durability of the submarine cable protection structure, but also reduces the cost of maintenance and replacement.

[0026] (5) The utility model discloses the half ring of detachable connection of multiple of setting up the sleeve ring subunit as, make the sleeve ring subunit that sets on the submarine cable can be easily disassembled and maintained, make when needing, can rapidly check and repair to the submarine cable, and this flexibility ensures the reliability and sustainability of the submarine cable system, reduces the economic loss caused by the failure downtime. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the working schematic diagram of the utility model;

[0028] Figure 2 It is the schematic diagram of the protection module of the utility model.

[0029] In the drawing, 1 is submarine cable;2 is seabed;3 is sleeve ring subunit;31 is upper ring;32 is first lower ring;33 is second lower ring;4 is buoyancy unit;5 is second connecting subunit;6 is anti-bending subunit;7 is first connecting subunit;8 is counterweight unit. DETAILED DESCRIPTION

[0030] In the following description, for the sake of explanation and not limitation, specific details are set forth, such as specific system structures, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0031] As Figure 1 shown, the utility model discloses a kind of submarine cable protection device suitable for shallow sea, comprising: multiple protection modules are sequentially arranged on submarine cable 1 along the extension direction of submarine cable 1, each protection module includes fixed unit, buoyancy unit 4 and counterweight unit;

[0032] Fixed unit is connected with submarine cable 1;

[0033] Preferably, fixed unit is made of high-strength corrosion-resistant alloy material, designed as U-shaped or ring-shaped structure, tightly wrapped around the periphery of submarine cable 1, and fixedly connected with submarine cable 1 by special fastening bolts or clamps, so as to ensure that the fixed unit will not fall off from submarine cable 1 in complex marine environment.

[0034] In one embodiment, the fixing unit comprises a collar subunit 3 and a second connecting subunit 5;

[0035] The collar subunit 3 is sleeved on the submarine cable 1, and the inner diameter of the collar subunit 3 matches the outer diameter of the submarine cable 1;

[0036] One end of the second connecting subunit 5 is connected with the collar subunit 3, and the other end is connected with two gravity subunits respectively.

[0037] As shown in the drawings, in one embodiment, the second connecting subunit 5 comprises two connecting rods, one end of each connecting rod is connected with the collar subunit 3, and the other end is connected with a corresponding gravity subunit. Figure 2 In other embodiments, the second connecting subunit can also be "Y" shaped.

[0038] Preferably, the collar subunit 3 comprises a plurality of half-rings;

[0039] The plurality of half-rings are detachably connected to form a collar subunit 3.

[0040] As shown in the drawings, in one embodiment, a collar subunit comprises three half-rings, i.e.

[0041] the upper ring 31, the first lower ring 32 and the second lower ring 33 in the collar subunit 3. Figure 2 Figure 2 Preferably, the detachable connection is any one of a clamp connection, a bolt connection, a mortise and tenon connection and a pin connection.

[0042] Preferably, the detachable connection is any one of a clamp connection, a bolt connection, a mortise and tenon connection and a pin connection.

[0043] The buoyancy unit 4 is connected to one end of the fixing unit close to the sea surface, for lifting the submarine cable 1 off the seabed 2.

[0044] Preferably, the buoyancy unit 4 is made of light and high-strength buoyancy material (such as high molecular weight polyethylene HMPE), in the shape of a cylinder or a sphere, and is connected to one end of the fixing unit close to the sea surface. The size and number of the buoyancy unit 4 are customized according to the depth of the submarine cable 1 and the required buoyancy, to ensure that the submarine cable 1 can be completely lifted off the seabed 2 and avoid direct friction with the seabed 2.

[0045] The counterweight unit 8 is connected to one end of the fixing unit close to the seabed, for preventing the submarine cable 1 from being displaced under the impact of sea waves.

[0046] After the protection device of the utility model is installed on the submarine cable 1, the buoyancy unit 4 lifts the submarine cable 1, avoiding the friction between the submarine cable 1 and the seabed 2; the counterweight unit 8 ensures the stability of the submarine cable 1 in the complex marine environment, effectively resisting the impact of sea waves.

[0047] Preferably, the counterweight unit 8 comprises two gravity subunits. ​

[0048] Two gravity sub-units are symmetrically connected to the end of the fixed unit near the seabed to prevent the submarine cable 1 from swaying left and right under the impact of waves.

[0049] The counterweight unit 8 consists of two symmetrically distributed gravity subunits. Each gravity subunit is made of a high-density material (such as cast iron, lead blocks, or precast concrete blocks), and each gravity subunit is connected to the end of the fixed unit near the seabed via a connecting rod, chain, or rope. The design of the two gravity subunits is intended to balance the forces on the submarine cable 1 in the water and prevent it from swaying from side to side under the impact of waves.

[0050] Preferably, the counterweight unit 8 further includes a first connecting subunit 7;

[0051] The first connecting subunit 7 is connected between the two gravity subunits to balance the load borne by the two gravity subunits.

[0052] The first connecting subunit 7 is made of high-strength materials (such as steel or composite materials) and is designed as a beam structure, connecting the two gravity subunits. This connecting subunit not only balances the load of the two gravity subunits, but also enhances the structural strength of the entire counterweight unit 8.

[0053] Preferably, the counterweight unit 8 also includes an anti-bending unit 6;

[0054] The anti-bending unit 6 is disposed on the first connecting subunit 7 to prevent the first connecting subunit 7 from bending and buckling.

[0055] The anti-bend unit 6 is made of high-strength materials (such as steel, composite materials, etc.) and is fixed to the easily bendable part of the first connecting subunit 7. When the submarine cable 1 is subjected to a large external impact, the anti-bend unit 6 can absorb and disperse the impact force, preventing the first connecting subunit 7 from bending and buckling damage.

[0056] like Figure 2 The anti-bend unit 6 is a high-strength plate with a through hole in the middle, and the first connecting sub-unit 7 consists of four parallel thin rods. The plate is fitted in the middle of the four thin rods. In this embodiment, the use of long thin rods can reduce the mass, but the stiffness is low. By combining the plate with the plate to increase the stiffness, the submarine cable 1 protection device can further enhance the stability and durability of the structure while maintaining the original buoyancy lifting and anti-displacement functions.

[0057] The specific installation steps of this utility model are as follows:

[0058] 1. Place multiple half-rings onto the submarine cable 1 in a preset order, ensuring that the inner diameter of each half-ring matches the outer diameter of the submarine cable 1. Then, using a selected detachable connection method (such as bolt connection), tightly connect adjacent half-rings together to form a complete loop subunit 3;

[0059] 2. One end of the second connecting subunit 5 is detachably connected to the collar subunit 3;

[0060] 3. Install anti-bending subunit 6 at the easily bent part of the first connecting subunit 7;

[0061] 4. Use the first connecting subunit 7, which is equipped with anti-bending unit, to connect the two gravity subunits to form a stable support structure. Then, connect the two gravity subunits to the two sides of the other end of the second connecting subunit 5 respectively.

[0062] 5. Connect the buoyancy unit 4 to the end of the ring sub-unit 3 that is closest to the sea surface, ensuring that the buoyancy unit 4 can drive the submarine cable 1 to completely detach from the seabed 2.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] (1) This utility model uses a buoyancy unit to lift the submarine cable off the seabed, effectively avoiding friction caused by direct contact between the submarine cable and the seabed, thus greatly reducing the risk of damage to the submarine cable due to friction. The buoyancy unit not only provides the necessary buoyancy, but also ensures the stable suspension of the submarine cable underwater, extending the service life of the submarine cable;

[0065] (2) By setting a counterweight unit at the bottom, this utility model provides additional stability for the submarine cable. In the complex and ever-changing marine environment, the counterweight unit can effectively resist the lateral displacement caused by environmental loads such as ocean currents and waves, ensuring that the submarine cable remains in the predetermined position. This not only improves the submarine cable's ability to resist risks, but also ensures the stability of the submarine cable's signal or power transmission.

[0066] (3) By symmetrically setting two gravity sub-units, the stability of the structure is further enhanced. When encountering a large lateral load, the symmetrically set two gravity sub-units can provide a balanced support force to prevent the overall structure from tilting due to uneven force, thereby ensuring that the submarine cable and its protective structure can maintain a stable operating state under various extreme weather and marine conditions.

[0067] (4) By setting an anti-bending subunit on the first connecting subunit, this utility model improves the overall strength and rigidity of the structure. The anti-bending subunit can effectively prevent the first connecting subunit from bending and buckling when subjected to external forces, thereby ensuring the integrity and stability of the entire protection structure. Therefore, this utility model not only improves the durability of the submarine cable protection structure, but also reduces the cost of maintenance and replacement.

[0068] (5) The present invention sets the loop subunit as multiple detachable half-rings, so that the loop subunit fitted on the submarine cable can be easily disassembled and repaired, and the submarine cable can be quickly inspected and repaired when needed. This flexibility ensures the reliability and sustainability of the submarine cable system and reduces the economic losses caused by downtime due to failure.

[0069] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A submarine cable protection device suitable for shallow seas, characterized in that, include: Multiple protection modules are sequentially installed on the submarine cable along its extension direction. Each protection module includes a fixing unit, a buoyancy unit, and a counterweight unit. The fixing unit is connected to the submarine cable; The buoyancy unit is connected to the end of the fixed unit near the sea surface and is used to drive the submarine cable away from the seabed. The counterweight unit is connected to the end of the fixed unit near the seabed to prevent the submarine cable from shifting under the impact of waves.

2. The submarine cable protection device suitable for shallow seas according to claim 1, characterized in that, The counterweight unit includes two gravity sub-units; Two gravity sub-units are symmetrically connected to the end of the fixed unit near the seabed to prevent the submarine cable from swaying left and right under the impact of waves.

3. The submarine cable protection device suitable for shallow seas according to claim 2, characterized in that, The counterweight unit also includes a first connecting subunit; The first connecting subunit is connected between the two gravity subunits to balance the load borne by the two gravity subunits.

4. The submarine cable protection device suitable for shallow seas according to claim 3, characterized in that, The counterweight unit also includes an anti-bending unit; The anti-bending subunit is disposed on the first connecting subunit to prevent the first connecting subunit from bending and buckling.

5. The submarine cable protection device suitable for shallow seas according to claim 1, characterized in that, The fixing unit includes a collar subunit and a second connecting subunit; The collar subunit is sleeved on the submarine cable, and the inner diameter of the collar subunit matches the outer diameter of the submarine cable. One end of the second connecting subunit is connected to the collar subunit, and the other end is connected to the two gravity subunits respectively.

6. The submarine cable protection device suitable for shallow seas according to claim 5, characterized in that, The collar subunit includes multiple half-rings; The multiple semi-rings are detachably connected and assembled into a ring sub-unit.

7. The submarine cable protection device suitable for shallow seas according to claim 6, characterized in that, The detachable connection can be any one of the following: clamp connection, bolt connection, tenon and mortise connection, and pin connection.

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