Dynamic protection device applied to suspended-span submarine cable

Abstract

The invention relates to the technical field of submarine cable protection devices, in particular to a dynamic protection device applied to a suspended-span submarine cable, which comprises a plurality of protection units, the plurality of protection units are used for sleeving the outer side of the submarine cable and are sequentially arranged along the extension direction of the submarine cable, and the adjacent protection units are arranged in a staggered manner according to the angle change, so that the flow guide effect is enhanced, and the service life of the submarine cable is prolonged. The protection unit comprises an outer protection part, a shunting part and a submarine cable clamping sleeve which are sequentially arranged from outside to inside, the outer protection part, the shunting part and the submarine cable clamping sleeve are coaxially arranged, the shunting part is of a hollow structure, the outer side of the shunting part is hinged to the outer protection part, the inner side of the shunting part is connected with the submarine cable clamping sleeve, and the submarine cable clamping sleeve is used for being arranged on a submarine cable in a sleeving mode; according to the device, multi-level subduction and diversion are achieved through diversion of the hollow diversion part and diversion of the diversion trenches, the incoming flow intensity is greatly reduced, and adaptability is high; the outer side of the shunting part is hinged to the outer protection part, and the outer protection part swings along with the flow to destroy the formation of wake flow vortexes, so that the effect of suppressing vortex-induced vibration is achieved, and the submarine cable is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable protection devices, and in particular to a dynamic protection device applied to a suspended spanning submarine cable. Background Art

[0002] Submarine cables exist in a complex and changeable marine environment. The suspended section of the submarine cable is completely exposed to seawater. The ocean currents from all around pass through the suspended section of the submarine cable to form a cylindrical flow. The fluid separates on the backflow side of the cylinder, and vortices periodically fall off in the wake, which will produce alternating forces on the submarine cable. According to Newton's third law, the submarine cable will be subject to periodic lift perpendicular to the direction of the incoming flow and resistance parallel to the direction of the incoming flow. These forces will cause vortex-induced vibrations in the submarine cable. On the one hand, vibrations will cause collisions between the submarine cable and surrounding objects (such as reefs, other submarine cables, etc.). Long-term collisions will cause the outer sheath of the submarine cable to wear. Once the outer sheath is damaged, seawater will invade the interior of the submarine cable, affecting the insulation performance of the submarine cable and the integrity of the internal structure. On the other hand, the metal conductors and optical fibers inside the submarine cable will be subjected to alternating stresses during the vibration process. This alternating stress will cause metal fatigue and optical fiber microbending.

[0003] The patent document with application number 202410707984.0 discloses a submarine cable protection device. The existing technology for controlling vortex-induced vibration of submarine cables is mainly a mechanical suppression device. The current suppression plate and the spiral strakes wound on the submarine cable are installed on the submarine cable by welding, bolt connection or ferrule, which disrupts the flow of the ocean current, changes the flow pattern of the ocean current, destroys the formation and shedding of vortices, and thus reduces the impact of vortex-induced vibration. Whether it is a relatively stable ocean current or a complex and changeable marine environment, the mechanical suppression device can play a role to a certain extent. However, there are also some problems with the mechanical suppression device. After the mechanical non-flexible suppression devices such as the current suppression plate and the spiral strake are installed on the submarine cable, the increase in the flow receiving area will significantly increase the resistance of the submarine cable in seawater; the existing mechanical suppression devices are usually made of metal materials and are relatively heavy. If they are densely installed on a long submarine cable, the load on the submarine cable will be significantly increased. In addition, the marine environment is characterized by high salinity and high humidity. The mechanical suppression device is immersed in seawater for a long time. Under the condition of dissolved oxygen in the water, the metal undergoes redox reaction and is susceptible to electrochemical corrosion. After a certain period of time, the mechanical suppression device may fall off and lose its protective function. Although the mechanical suppression diverter can guide the water flow to a certain extent, destroy the generated vortex, and reduce the impact of vortex-induced vibration, the reduction effect is relatively limited. When the flow rate is high, the impact of the fluid will cause the submarine cable to undergo a more obvious horizontal displacement. This situation is urgently needed to be avoided in engineering. Summary of the invention

[0004] In order to solve the above technical problems existing in the prior art, the present invention provides a dynamic protection device applied to a suspended spanning submarine cable.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a dynamic protection device for a suspended submarine cable, comprising: a plurality of protection units, wherein the plurality of protection units are used to be sleeved on the outside of the submarine cable and are arranged in sequence along the extension direction of the submarine cable, the protection unit comprises an outer protective part, a diverter part and a submarine cable jacket which are arranged in sequence from the outside to the inside, the outer protective part, the diverter part and the submarine cable jacket are coaxially arranged, the diverter part is a hollow structure, the outer side of the diverter part is hinged to the outer protective part, the inner side of the diverter part is connected to the submarine cable jacket, and the submarine cable jacket is used to be sleeved on the submarine cable. By setting a plurality of protection units, the plurality of protection units are used to be sleeved on the outside of the submarine cable and are arranged in sequence along the extension direction of the submarine cable, the protection unit comprises an outer protective part, a diverter part and a submarine cable jacket which are arranged in sequence from the outside to the inside, the outer protective part, the diverter part and the submarine cable jacket are coaxially arranged, the diverter part is a hollow structure, the outer side of the diverter part is hinged with the outer protective part, the inner side of the diverter part is connected with the submarine cable jacket, and the submarine cable jacket is used to be sleeved on the submarine cable; the diverter part is divided through the hollow diverter part and the guide groove, and the plurality of protection units are used to be sleeved on the outside of the submarine cable The protection units are arranged in sequence on both sides and along the extension direction of the submarine cable, two adjacent protection units are staggered according to the angle change, and a plurality of protection units are arranged in a spiral shape, and are staggered according to the angle gradient set under the actual environmental working conditions to enhance the flow diversion effect, realize multi-level diversion and suppression effect, and greatly reduce the intensity of the incoming flow. The outer side of the diversion part is hinged with the outer protection part, and the outer protection part is used to swing with the flow in the wake area to destroy the formation of the wake vortex, so as to achieve a good effect of suppressing vortex-induced vibration, thereby protecting the submarine cable.

[0006] As an optional implementation scheme, in the dynamic protection device for suspended spanning submarine cables provided by the present invention, the diverter portion includes a first diverter plate, a second diverter plate and a third diverter plate, and the first diverter plate, the second diverter plate and the third diverter plate are connected end to end by connectors to form a triangular structure. The triangular structure has good stability, reduces the angle of change of flow direction of the water flow, and enhances the diversion effect. The water flow can pass through the area between the outer protective part and the diverter portion, and also achieves the segmentation and destruction of the water flow, achieving a good effect of suppressing vortex-induced vibration. The first diverter plate, the second diverter plate and the third diverter plate are assembled by connectors, which greatly reduces the cost, is also convenient for storage, transportation and installation, and speeds up the progress of module production and construction.

[0007] As an optional embodiment, in the dynamic protection device for suspended-span submarine cables provided by the present invention, the diverter also includes an inverted V-shaped connection portion, and the outer sides of the first diverter plate, the second diverter plate, and the third diverter plate are all provided with the inverted V-shaped connection portion, and the first diverter plate, the second diverter plate, and the third diverter plate are all connected to the outer protection portion through the inverted V-shaped connection portion. By providing an inverted V-shaped connection portion to increase the distance between the diverter and the outer protection portion, the ocean current can flow out from the V-shaped protrusion between the diverter and the outer protection portion, thereby achieving the effect of diversion. When the ocean current passes through, the outer protection portion can also have space to swing with the ocean current, thereby achieving a good effect of suppressing vortex-induced vibration.

[0008] As an optional embodiment, in the dynamic protection device for suspended submarine cables provided by the present invention, both ends of the inverted V-shaped connection part are connected to the outer protection part through a U-shaped connection piece, one end of the U-shaped connection piece is hinged to the inverted V-shaped connection part, and the other end of the U-shaped connection piece is fixedly connected to the outer protection part. By arranging U-shaped connection pieces at both ends of the inverted V-shaped connection part so that the outer protection part can swing while being fixed, the effect of suppressing vortex-induced vibration is played.

[0009] As an optional embodiment, in the dynamic protection device for suspended-span submarine cables provided by the present invention, a circular protrusion is provided at the contact position between the inverted V-shaped connection part and the outer protection part. By providing the circular protrusion, the inverted V-shaped connection part and the outer protection part are more closely fitted, so that the outer protection part has space to swing with the ocean current.

[0010] As an optional implementation, in the dynamic protection device for suspended span submarine cables provided by the present invention, flow guide grooves are provided on both sides of the inverted V-shaped connection portion. By providing the flow guide grooves, the impact of the incoming flow is reduced to a large extent, the flow velocity is reduced, and finally the suppression effect is achieved, thereby playing the role of protecting the submarine cable.

[0011] As an optional embodiment, in the dynamic protection device for suspended-span submarine cables provided by the present invention, arc grooves corresponding to the guide grooves are provided on both sides of the outer protective part. Similarly, arc grooves corresponding to the guide grooves are provided to facilitate the suppression of vortex-induced vibrations.

[0012] As an optional implementation scheme, in the dynamic protection device for suspended submarine cables provided by the present invention, the outer protective part includes a plurality of guard plates, each of which is an arc-shaped sheet structure, and the plurality of guard plates are arranged in a circular array. Both ends of the guard plates are hinged to the inverted V-shaped connecting parts, and each guard plate is hinged to the corresponding inverted V-shaped connecting part. The plurality of arc-shaped sheet-shaped outer guard plates are arranged in a circular array to form a full circle structure, which can withstand the impact of incoming flow from all directions of the submarine cable and control the movement amplitude of the submarine cable.

[0013] As an optional embodiment, in the dynamic protection device for suspended spanning submarine cables provided by the present invention, the submarine cable jacket includes a plurality of arc-shaped connecting pieces, the arc-shaped connecting pieces are connected to the diversion part by threads, and the plurality of arc-shaped connecting pieces form a full circle structure for being sleeved on the submarine cable. By providing a plurality of arc-shaped connecting pieces, it is easy to assemble and wrap the submarine cable, so as to achieve the purpose of protecting the submarine cable and realize the installation and fixation of the entire device.

[0014] As an optional implementation scheme, in the dynamic protection device for suspended span submarine cables provided by the present invention, two adjacent protection units are arranged in a staggered manner according to angle changes, and multiple protection units are arranged in a spiral shape. Multiple protection units are used to be sleeved on the outside of the submarine cable and arranged in sequence along the extension direction of the submarine cable. The number of each protection unit and the gap between adjacent protection units can be customized according to the strength of the ocean current and the basin environment. At the same time, the installation deflection angle of the protection unit can be gradually changed so that the multiple protection units are arranged in a spiral shape as a whole, further achieving the separation and suppression effect of the water flow, thereby protecting the submarine cable.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0016] 1. The dynamic protection device for suspended spanning submarine cables provided by the present invention comprises a plurality of protection units, which are used to be sleeved on the outside of the submarine cable and are arranged in sequence along the extension direction of the submarine cable. The protection unit comprises an outer protective part, a diverter part and a submarine cable jacket which are arranged in sequence from the outside to the inside. The outer protective part, the diverter part and the submarine cable jacket are coaxially arranged. The diverter part is a hollow structure. The outer side of the diverter part is hinged to the outer protective part, and the inner side of the diverter part is connected to the submarine cable jacket. The submarine cable jacket is used to be sleeved on the submarine cable. Partial flow and guide trough diversion, multiple protection units are used to be installed on the outside of the submarine cable and arranged in sequence along the extension direction of the submarine cable, so as to achieve multi-level reduction and diversion, with good suppression effect, greatly reducing the intensity of the incoming flow, and can also make specific adjustments to the number of protection units and the spacing between units according to different sea conditions, with strong adaptability; the outer side of the diversion part is hinged with the outer protective part, and the outer protective part is used to swing with the flow in the wake area to destroy the formation of the wake vortex, so as to achieve a good effect of suppressing vortex-induced vibration, thereby protecting the submarine cable.

[0017] 2. In the dynamic protection device for suspended spanning submarine cables provided by the present invention, the first diverter plate, the second diverter plate and the third diverter plate are connected end to end in sequence by connecting pieces to form a triangular structure. The triangular structure has good stability, reduces the angle of change of water flow direction, and enhances the diversion effect. The water flow can pass through the area between the outer protective part and the diverter part, and the water flow is segmented and destroyed, achieving a good effect of suppressing vortex-induced vibration. The first diverter plate, the second diverter plate and the third diverter plate are assembled by connecting pieces, which greatly reduces the cost, facilitates storage, transportation and installation, and speeds up the module production and construction progress.

[0018] 3. In the dynamic protection device for suspended spanning submarine cables provided by the present invention, a plurality of protection units are used to be sleeved on the outside of the submarine cable and arranged in sequence along the extension direction of the submarine cable, and two adjacent protection units are staggered according to angle changes, and a plurality of protection units are arranged in a spiral shape, which enhances the diversion effect. The number of each protection unit and the gap between adjacent protection units can be customized according to the strength of the ocean current and the basin environment. At the same time, the installation deflection angle of the protection unit can be gradually changed so that the plurality of protection units are arranged in a spiral shape as a whole, further realizing the separation and suppression effect of the water flow, thereby protecting the submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a dynamic protection device for a suspended spanning submarine cable provided by the present invention;

[0021] Figure 2 A schematic side view of a dynamic protection device for a suspended spanning submarine cable provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the protection unit provided by the present invention.

[0023] [Description of Reference Numerals]

[0024] 1. Outer protective part; 11. Arc groove; 12. Protective plate; 2. Diverter part; 21. First diverter plate; 22. Second diverter plate; 23. Third diverter plate; 24. Connector; 25. Inverted V-shaped connector; 26. U-shaped connector; 27. Circular protrusion; 28. Guide groove; 3. Submarine cable jacket; 31. Arc connecting piece; 4. Submarine cable. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention, such as first, second, up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The present invention provides a dynamic protection device for a suspended submarine cable. Figure 1-Figure 3 As shown, it includes: a plurality of protection units, the plurality of protection units are used to be sleeved on the outside of the submarine cable 4 and are arranged in sequence along the extension direction of the submarine cable 4, the protection unit includes an outer protective part 1, a diverter part 2 and a submarine cable jacket 3 which are arranged in sequence from the outside to the inside, the outer protective part 1, the diverter part 2 and the submarine cable jacket 3 are coaxially arranged, the diverter part 2 is a hollow structure, the outer side of the diverter part 2 is hinged to the outer protective part 1, the inner side of the diverter part 2 is connected to the submarine cable jacket 3, and the submarine cable jacket 3 is used to be sleeved on the submarine cable 4. By setting a plurality of protection units, the plurality of protection units are used to be sleeved on the outer side of the submarine cable 4 and are arranged in sequence along the extension direction of the submarine cable 4. The protection units include an outer protective part 1, a diverter part 2 and a submarine cable jacket 3 which are arranged in sequence from the outside to the inside. The outer protective part 1, the diverter part 2 and the submarine cable jacket 3 are coaxially arranged. The diverter part 2 is a hollow structure. The outer side of the diverter part 2 is hinged to the outer protective part 1, and the inner side of the diverter part 2 is connected to the submarine cable jacket 3. The submarine cable jacket 3 is used to be sleeved on the submarine cable 4. The diverter part 2 is divided by the hollow diverter part 2 and the guide groove 28 is used to divide the flow. Diversion, multiple protection units are used to be installed on the outside of the submarine cable 4 and are arranged in sequence along the extension direction of the cable 4, so as to achieve multi-level diversion reduction, good suppression effect, greatly reduce the intensity of the incoming flow, and can also make specific adjustments to the number of protection units and the spacing between units according to different sea conditions, with strong adaptability; the outer side of the diversion part 2 is hinged to the outer protective part 1, and the outer protective part 1 is used to swing with the flow in the wake area to destroy the formation of the wake vortex, so as to achieve a good effect of suppressing vortex-induced vibration, thereby protecting the submarine cable 4.

[0029] Among them, the outer protection part 1 can be made of polyethylene material. The existing mechanical suppression device uses a lot of metal materials, which are relatively dense and high in quality. The production and subsequent installation and implementation costs are relatively high. At the same time, it is also more prone to electrochemical corrosion in complex marine environments and needs to be replaced regularly. The guard plate 12 can be made of polyethylene material. Compared with the traditional mechanical suppression device, the outer protection part 1 is made of polyethylene material. The polyethylene material is soft, corrosion-resistant, and light in weight. At the same time, it also reduces the processing cost. While ensuring strength, the outer protection part 1 with good flexibility and light weight can swing with the current when the current passes, further achieving a good effect of suppressing vortex-induced vibration.

[0030] like Figure 3 As shown, in the dynamic protection device for suspended-span submarine cables provided by the present invention, the diverter 2 includes a first diverter plate 21, a second diverter plate 22 and a third diverter plate 23, and the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are connected end to end by a connector 24 to form a triangular structure. The triangular structure has good stability, reduces the angle of change of the flow direction of the water flow, and enhances the diversion effect. The water flow can pass through the area between the outer protection part 1 and the diverter 2, and also achieves the segmentation and destruction of the water flow, achieving a good effect of suppressing vortex-induced vibration. The first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are assembled by the connector 24, which greatly reduces the cost, is also convenient for storage, transportation and installation, and speeds up the progress of module production and construction. Among them, the connecting piece 24 is a V-shaped connecting piece 24, and the first and second diverter plates 21, 22 and the third diverter plate 23 are threadedly connected in sequence through the V-shaped connecting piece 24, so that the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are spliced ​​together through threads for easy installation.

[0031] In order to achieve a good effect of suppressing vortex-induced vibration, in the dynamic protection device for suspended-span submarine cables provided by the present invention, the diverter 2 also includes an inverted V-shaped connection portion 25, and the outer sides of the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are all provided with an inverted V-shaped connection portion 25, and the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are all connected to the outer protection portion 1 through the inverted V-shaped connection portion 25. By providing the inverted V-shaped connection portion 25 to increase the distance between the diverter 2 and the outer protection portion 1, the sea current can flow out from the V-shaped protrusion between the diverter 2 and the outer protection portion 1, so as to achieve the effect of diversion. When the sea current passes through, the outer protection portion 1 can also have space to swing with the sea current, so as to achieve a good effect of suppressing vortex-induced vibration.

[0032] Among them, Figure 3As shown, the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 and the inverted V-shaped connecting portion 25 are an integrally formed structure, and the first diverter plate 21, the second diverter plate 22 and the third diverter plate 23 are all provided with an inverted V-shaped connecting portion 25 at the middle position of the outer side, and the inverted V-shaped connecting portion 25 is hinged to the outer protective portion 1, and the outer protective portion 1 swings in the wake area. Compared with the existing mechanical suppression devices, most of which face the incoming flow directly and then perform subsequent destruction, the dynamic protection device for suspended spanning submarine cables provided by the present invention utilizes a triangular hollow diverter portion 2, a hollow inverted V-shaped connecting portion 25 and a plurality of protection units that are arranged in a staggered manner in sequence to achieve multi-level reduction and diversion, and the suppression effect is better.

[0033] Furthermore, in the dynamic protection device for suspended submarine cables provided by the present invention, both ends of the inverted V-shaped connection part 25 are connected to the outer protection part 1 through a U-shaped connection part 26, one end of the U-shaped connection part 26 is hinged to the inverted V-shaped connection part 25, and the other end of the U-shaped connection part 26 is fixedly connected to the outer protection part 1. By arranging U-shaped connection parts 26 at both ends of the inverted V-shaped connection part 25 so that the outer protection part 1 can swing while being fixed, the destructive effect on the wake is enhanced, thereby playing a role in suppressing vortex-induced vibration.

[0034] Preferably, in the dynamic protection device for suspended spanning submarine cables provided by the present invention, a circular protrusion 27 is provided at the contact position between the inverted V-shaped connection part 25 and the outer protection part 1. By providing the circular protrusion 27, the inverted V-shaped connection part 25 and the outer protection part 1 are more closely fitted, so that the outer protection part 1 has space to swing with the ocean current.

[0035] like Figure 3 As shown, in the dynamic protection device for suspended submarine cables provided by the present invention, the outer protective part 1 includes a plurality of protective plates 12, the protective plates 12 are in an arc-shaped sheet structure, and the plurality of protective plates 12 are arranged in a circular array. Both ends of the protective plates 12 are hinged to the inverted V-shaped connecting parts 25, and each protective plate 12 is hinged to the corresponding inverted V-shaped connecting part 25. The plurality of arc-shaped sheet-like outer protective plates 12 are arranged in a circular array to form a full circle structure, which can withstand the impact of the incoming flow from all directions of the submarine cable 4 and control the movement amplitude of the submarine cable 4. Existing mechanical suppression devices use a large amount of metal materials with relatively high density and high quality, and the production and subsequent installation costs are relatively high. At the same time, they are also more prone to electrochemical corrosion in complex marine environments and need to be replaced regularly. The guard plate 12 can be made of polyethylene material. Compared with traditional mechanical suppression devices, the outer guard 1 is made of polyethylene material. The polyethylene material is soft, corrosion-resistant, and light in weight. At the same time, it also reduces the processing cost. While ensuring strength, the outer guard 1 with good flexibility and light weight can swing with the current when the current passes, thereby further achieving a good effect of suppressing vortex-induced vibration.

[0036] In addition, in the dynamic protection device for suspended spanning submarine cables provided by the present invention, guide grooves 28 are provided on both sides of the inverted V-shaped connection portion 25. By providing the guide grooves 28, the ocean current is segmented and destroyed, the impact of the incoming current is reduced to a large extent, the flow velocity is reduced, and finally the suppression effect is achieved, thereby protecting the submarine cable 4.

[0037] Further, in the dynamic protection device for suspended spanning submarine cables provided by the present invention, arc grooves 11 corresponding to the guide grooves 28 are provided on both sides of the outer protective part 1. Similarly, arc grooves 11 corresponding to the guide grooves 28 are provided to facilitate the suppression of vortex-induced vibration.

[0038] like Figure 1 and Figure 3 As shown, in the dynamic protection device for suspended-spanning submarine cables provided by the present invention, the submarine cable jacket 3 includes a plurality of arc-shaped connecting pieces 31, the arc-shaped connecting pieces 31 are connected to the diversion part 2 by threads, and the plurality of arc-shaped connecting pieces 31 form a full-circle structure for being sleeved on the submarine cable 4. By providing a plurality of arc-shaped connecting pieces 31, it is convenient to assemble and wrap the submarine cable 4, so as to achieve the purpose of protecting the submarine cable 4 and realize the installation and fixation of the entire device.

[0039] Preferably, in the dynamic protection device for suspended-spanning submarine cables provided by the present invention, Figure 1 and Figure 2 As shown, a plurality of protection units are used to be sleeved on the outside of the submarine cable 4 and are arranged in sequence along the extension direction of the submarine cable 4, and two adjacent protection units are staggered according to the angle change, and the plurality of protection units are arranged in a spiral shape, and are staggered according to the angle gradient set in the actual environmental working conditions, so that the plurality of protection units are arranged in a spiral shape as a whole, achieving a diversion effect similar to that of a spiral column plate, so as to enhance the diversion effect, and the number of each protection unit and the gap between adjacent protection units can be customized according to the strength of the ocean current and the basin environment, so as to further achieve the separation and suppression effect of the water flow, so as to protect the submarine cable 4.

[0040] The installation process of the dynamic protection device for suspended spanning submarine cables provided by the present invention is as follows: collect marine environmental data of the submarine cable 4 laying area, such as water flow speed, direction, tide, ocean current and other information, and design the specifications, installation location and layout of the protection device in combination with the characteristics of the submarine cable 4. Position the construction ship above the submarine cable 4, and use the positioning system and detection equipment on the ship to accurately determine the position of the submarine cable 4. Simply clean the surface of the submarine cable 4 to create good conditions for installing the protection device. In addition, the various guard plates 12 of the outer protective part 1 and the various diversion plates of the diversion part 2 can be assembled in advance, and the arc-shaped connecting piece 31 of the submarine cable jacket 3 is attached to the submarine cable 4 along the extension direction of the submarine cable 4 according to the preset number of devices and the steering angle. The various diversion plates are tightened and locked by bolts through the connector 24, and the fitting is checked while installing. For loose connections, tilted devices, etc., timely adjustments and reinforcements are made to complete the installation.

[0041] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A dynamic protection device for a suspended submarine cable, characterized in that: The invention comprises a plurality of protection units, wherein the plurality of protection units are used to be sleeved on the outer side of a submarine cable (4) and are arranged in sequence along the extension direction of the submarine cable (4); the protection units comprise an outer protective part (1), a diverter part (2) and a submarine cable jacket (3) which are arranged in sequence from the outside to the inside; the outer protective part (1), the diverter part (2) and the submarine cable jacket (3) are coaxially arranged; the diverter part (2) is a hollow structure; the outer side of the diverter part (2) is hinged to the outer protective part (1); the inner side of the diverter part (2) is connected to the submarine cable jacket (3); and the submarine cable jacket (3) is used to be sleeved on the submarine cable (4).

2. The dynamic protection device for suspended submarine cables according to claim 1 is characterized in that: The flow dividing portion (2) comprises a first flow dividing plate (21), a second flow dividing plate (22) and a third flow dividing plate (23), wherein the first flow dividing plate (21), the second flow dividing plate (22) and the third flow dividing plate (23) are connected end to end in sequence via a connecting piece (24) to form a triangular structure.

3. The dynamic protection device for suspended-spanning submarine cables according to claim 2 is characterized in that: The flow dividing portion (2) further comprises an inverted V-shaped connecting portion (25), the outer sides of the first flow dividing plate (21), the second flow dividing plate (22) and the third flow dividing plate (23) are all provided with the inverted V-shaped connecting portion (25), and the first flow dividing plate (21), the second flow dividing plate (22) and the third flow dividing plate (23) are all connected to the outer protective portion (1) via the inverted V-shaped connecting portion (25).

4. The dynamic protection device for suspended-spanning submarine cables according to claim 3 is characterized in that: The two ends of the inverted V-shaped connection part (25) are connected to the outer protection part (1) via a U-shaped connection piece (26); one end of the U-shaped connection piece (26) is hinged to the inverted V-shaped connection part (25); and the other end of the U-shaped connection piece (26) is fixedly connected to the outer protection part (1).

5. The dynamic protection device for suspended-spanning submarine cables according to claim 3 is characterized in that: A circular protrusion (27) is provided at the contact position between the inverted V-shaped connecting portion (25) and the outer protective portion (1).

6. The dynamic protection device for suspended-spanning submarine cables according to claim 3 is characterized in that: Guide grooves (28) are provided on both sides of the inverted V-shaped connecting portion (25).

7. The dynamic protection device for a suspended submarine cable according to claim 6 is characterized in that: Arc grooves (11) corresponding to the guide grooves (28) are provided on both sides of the outer protective part (1).

8. The dynamic protection device for suspended-spanning submarine cables according to claim 3 is characterized in that: The outer protective part (1) comprises a plurality of protective plates (12), the protective plates (12) being in an arc-shaped sheet structure, the plurality of protective plates (12) being arranged in a circular array, and the two ends of the protective plates (12) being hinged to the inverted V-shaped connecting part (25).

9. The dynamic protection device for suspended-spanning submarine cables according to claim 1, characterized in that: The submarine cable jacket (3) comprises a plurality of arc-shaped connecting pieces (31), wherein the arc-shaped connecting pieces (31) are connected to the diversion portion (2) via threads, and the plurality of arc-shaped connecting pieces (31) form a full circular structure for being sleeved on the submarine cable (4).

10. The dynamic protection device for suspended-spanning submarine cables according to claim 1, characterized in that: Two adjacent protection units are arranged in a staggered manner according to angle changes, and a plurality of protection units are arranged in a spiral shape.

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