Dynamic protection device applied to suspended-span submarine cable

Abstract

The utility model 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 being sleeved on the outer side of the submarine cable and sequentially arranged along the extension direction of the submarine cable, and the adjacent protection units are arranged in a staggered manner according to angle change. 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. The outer protection part is made of a polyethylene material and comprises a plurality of protection plates, and the protection plates are of arc-shaped sheet structures; according to the device, through flow division of the flow division part and flow division of the flow guide groove, multi-level subduction flow division is achieved, and the incoming flow intensity is reduced; and the outer protection part swings along with the flow to destroy the formation of wake flow vortexes so as to achieve the effect of inhibiting vortex-induced vibration.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of submarine cable protection device, especially to a kind of dynamic protection device applied to suspension submarine cable. BACKGROUND

[0002] Submarine cable exists in complex and changeable marine environment, and the suspended section of submarine cable is completely exposed to seawater. The flow from the surrounding passes through the suspended section of submarine cable to generate cylindrical flow movement. Separation phenomenon occurs on the back flow side of the cylinder, and vortex shedding occurs periodically in the wake flow part, which generates alternating forces on the submarine cable. According to Newton's third law, the submarine cable will be subjected to periodic lift perpendicular to the flow direction and drag parallel to the flow direction. These forces will cause vortex-induced vibration of the submarine cable. On the one hand, vibration will cause the submarine cable to collide with surrounding objects (such as rocks, other submarine cables, etc.). Long-term collision will cause the outer sheath of the submarine cable to wear out. Once the outer sheath is damaged, seawater will enter the interior of the submarine cable, affecting the insulation performance and the integrity of the internal structure of the submarine cable. On the other hand, the metal conductor and optical fiber inside the submarine cable will bear alternating stress during vibration. 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 control submarine cable vortex-induced vibration technology mainly uses mechanical suppression devices. The suppression devices are installed on the submarine cable by welding, bolt connection or sleeve, etc. to install flow suppression plates and spiral plates wrapped around the submarine cable, disturb the flow of seawater, change the flow pattern of seawater, and destroy the formation and shedding of vortex, thereby reducing the influence of vortex-induced vibration. Whether it is a relatively stable seawater flow or a complex and changeable marine environment, the mechanical suppression device can play a role to a certain extent. However, the mechanical suppression device also has some problems. After the mechanical non-flexible suppression device such as flow suppression plate and spiral plate is installed on the submarine cable, the flow area increases, which significantly increases the resistance of the submarine cable in seawater. The existing mechanical suppression device is usually made of metal material, which has relatively large mass. If it is densely installed on a long submarine cable, it will significantly increase the load of the submarine cable. In addition, the marine environment has the characteristics of high salinity and high humidity. The mechanical suppression device is immersed in seawater for a long time. Under the condition of water dissolved oxygen, the metal undergoes oxidation-reduction reaction and is easily subjected to electrochemical corrosion. After a certain period of time, the mechanical suppression device may fall off and lose its protective effect. Although the mechanical flow suppression plate can guide the flow of water, destroy the generated vortex, and reduce the influence of vortex-induced vibration to a certain extent, the reduction effect is limited. When the flow rate is large, the impact of fluid will cause the submarine cable to move horizontally, which is an urgent problem to be avoided in engineering. SUMMARY

[0004] The utility model provides a kind of dynamic protection device applied to suspension sea cable to solve the above-mentioned technical problems existing in prior art.

[0005] In order to achieve the above object, the utility model provides a kind of dynamic protection device applied to suspension sea cable, comprising: multiple protection units, multiple the protection unit is used to set in the outside of sea cable and sequentially arranged along the extension direction of the sea cable, the protection unit includes the outer protection part, the shunt part and the sea cable jacket that are sequentially arranged from outside to inside, the outer protection part, the shunt part and the sea cable jacket are coaxially arranged, the shunt part is hollow structure, the outside of the shunt part is hinged with the outer protection part, the inside of the shunt part is connected with the sea cable jacket, the sea cable jacket is used to set on the sea cable, the outer protection part is made of polyethylene material, the outer protection part includes multiple guard plates, the guard plate is arc-shaped sheet structure.Through the arrangement of multiple protection units, multiple the protection unit is used to set in the outside of sea cable and sequentially arranged along the extension direction of the sea cable, the protection unit includes the outer protection part, the shunt part and the sea cable jacket that are sequentially arranged from outside to inside, the outer protection part, the shunt part and the sea cable jacket are coaxially arranged, the shunt part is hollow structure, the outside of the shunt part is hinged with the outer protection part, the inside of the shunt part is connected with the sea cable jacket, the sea cable jacket is used to set on the sea cable;Through the shunt of hollow shunt part and guide groove, multiple the protection unit is used to set in the outside of sea cable and sequentially arranged along the extension direction of the sea cable, the adjacent two protection units are staggered arrangement according to angle change, multiple the protection unit is spiral arrangement, and the angle gradient according to actual environmental conditions is arranged in staggered mode, to strengthen the guide effect, realize multilevel reduction shunt, and the inhibition effect is good, the coming flow intensity is greatly reduced, the outside of the shunt part is hinged with the outer protection part, and the flow oscillation of the outer protection part is used in the wake region, the formation of wake vortex is destroyed, the effect of good vortex-induced vibration inhibition is achieved, thereby playing the role of protecting the sea cable.

[0006] As an optional embodiment, in the dynamic protection device applied to suspension sea cable provided by the utility model, the shunt part includes a first shunt plate, a second shunt plate and a third shunt plate, and the first shunt plate, the second shunt plate and the third shunt plate are sequentially connected by a connecting piece to form a triangular structure. The triangular structure has good stability, reduces the change of water flow direction angle, enhances the shunt effect, and the water flow can pass through the area between the outer protection part and the shunt part, which also achieves water flow segmentation and damage, achieves good vortex-induced vibration inhibition effect, and the first shunt plate, the second shunt plate and the third shunt plate are assembled through the connecting piece, which greatly reduces the cost, is convenient for storage, transportation and installation, and speeds up the module manufacturing construction progress.

[0007] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, the shunt part further comprises a reverse V-shaped connecting part, the outer sides of the first shunt plate, the second shunt plate and the third shunt plate are each provided with the reverse V-shaped connecting part, and the first shunt plate, the second shunt plate and the third shunt plate are connected with the outer protection part through the reverse V-shaped connecting part. The reverse V-shaped connecting part is arranged to increase the distance between the shunt part and the outer protection part, so that the sea current can flow out of the V-shaped protruding part between the shunt part and the outer protection part, the effect of shunting is achieved, and the outer protection part can swing with the sea current when the sea current passes, so that the effect of inhibiting vortex-induced vibration is achieved.

[0008] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, the two ends of the reverse V-shaped connecting part are connected with the outer protection part through a U-shaped connecting piece, one end of the U-shaped connecting piece is hinged to the reverse V-shaped connecting part, and the other end of the U-shaped connecting piece is fixedly connected with the outer protection part. The U-shaped connecting piece is arranged at the two ends of the reverse V-shaped connecting part, so that the outer protection part can swing while being fixed, and the effect of inhibiting vortex-induced vibration is achieved.

[0009] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, the contact position of the reverse V-shaped connecting part and the outer protection part is provided with a circular protrusion. The circular protrusion is arranged to make the reverse V-shaped connecting part and the outer protection part more fit, so that the outer protection part can swing with the sea current.

[0010] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, the two sides of the reverse V-shaped connecting part are provided with flow guide grooves. The flow guide grooves are arranged to greatly reduce the impact of the incoming flow, reduce the flow rate, and finally achieve the effect of inhibition, so as to achieve the effect of protecting the submarine cable.

[0011] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, the two sides of the outer protection part are provided with arc-shaped grooves corresponding to the flow guide grooves. Similarly, the arc-shaped grooves corresponding to the flow guide grooves are arranged to achieve the effect of inhibiting vortex-induced vibration.

[0012] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable, a plurality of the protection plates are arranged in a circumferential array, the two ends of the protection plate are hinged to the reverse V-shaped connecting part, each protection plate is hinged to the corresponding reverse V-shaped connecting part, and the plurality of arc-shaped plate-shaped outer protection plates are arranged in a circumferential array to form a whole circle structure, so as to resist the impact of the incoming flow from each direction of the submarine cable and control the movement amplitude of the submarine cable.

[0013] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable provided by the utility model, the submarine cable jacket comprises a plurality of arc-shaped connecting pieces, the arc-shaped connecting pieces are connected with the flow dividing part through threads, and the plurality of arc-shaped connecting pieces enclose a whole circle structure for being sleeved on the submarine cable. By arranging the plurality of arc-shaped connecting pieces, the submarine cable is conveniently assembled and wrapped, the submarine cable is protected, and the installation and fixation of the whole device are realized.

[0014] As an optional implementation, in the dynamic protection device applied to the suspension submarine cable provided by the utility model, the adjacent two protection units are arranged in a staggered manner according to the angle change, and the plurality of protection units are arranged in a spiral shape. The number of the protection units and the gap between the adjacent protection units can be customized according to the current strength and the flow environment, and the installation deflection angle of the protection units can be changed in a gradient manner. In this way, the plurality of protection units are arranged in a spiral shape as a whole, the separation and suppression effects of the water flow are further realized, and the submarine cable is protected.

[0015] Compared with the prior art, the utility model technical scheme has the beneficial effects that:

[0016] Firstly, the dynamic protection device applied to the suspension submarine cable provided by the utility model is characterized in that a plurality of protection units are arranged, the plurality of protection units are arranged on the outer side of the submarine cable and arranged in sequence along the extension direction of the submarine cable, the protection unit comprises an outer protection part, a flow dividing part and a submarine cable jacket arranged in sequence from outside to inside, the outer protection part, the flow dividing part and the submarine cable jacket are coaxially arranged, the flow dividing part has a hollow structure, the outer side of the flow dividing part is hinged to the outer protection part, the inner side of the flow dividing part is connected to the submarine cable jacket, and the submarine cable jacket is used for being sleeved on the submarine cable. The flow is divided by the hollow flow dividing part and the flow guide groove, the plurality of protection units are arranged on the outer side of the submarine cable and arranged in sequence along the extension direction of the submarine cable, multi-level flow reduction is realized, the suppression effect is good, the incoming flow strength is greatly reduced, and the number and spacing of the protection units can be specifically adjusted according to different sea conditions, so that the adaptability is high. The outer side of the flow dividing part is hinged to the outer protection part, the outer protection part swings with the flow in the wake region, the formation of the wake vortex is destroyed, the vortex-induced vibration effect is well inhibited, and the submarine cable is protected.

[0017] Secondly, in the dynamic protection device applied to the suspension submarine cable provided by the utility model, the first flow dividing plate, the second flow dividing plate and the third flow dividing plate are connected in sequence through the connecting piece to form a triangular structure. The triangular structure has good stability, the flow direction angle is reduced, the flow dividing effect is enhanced, the water flow can pass through the area between the outer protection part and the flow dividing part, the water flow is also segmented and destroyed, the vortex-induced vibration effect is well inhibited, the first flow dividing plate, the second flow dividing plate and the third flow dividing plate are assembled through the connecting piece, the cost is greatly reduced, and the module is convenient to store, transport and install, so that the module manufacturing construction progress is accelerated.

[0018] Third, the utility model provides a dynamic protection device for suspension cable, a plurality of protection units are used for being sleeved on the outside of the submarine cable and are arranged in turn along the extension direction of the submarine cable, and adjacent two protection units are arranged in dislocation according to the angle change, a plurality of protection units are arranged in spiral, the flow guiding effect is strengthened, the number of each protection unit and the gap between adjacent protection units can be customized according to the sea current strength and the basin environment, and the installation deflection angle of the protection unit can be changed in gradient, so that a plurality of protection units are arranged in spiral as a whole, the separation and inhibition effect of water flow are further realized, and the submarine cable is protected. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0020] Figure 1 The structural schematic diagram of the dynamic protection device for suspension cable is provided for the utility model,

[0021] Figure 2 The side view schematic diagram of the dynamic protection device for suspension cable is provided for the utility model,

[0022] Figure 3 The structural schematic diagram of the protection unit is provided for the utility model.

[0023]

Explanation of the drawings

[0024] 1, outer protection part;11, arc-shaped groove;12, guard plate;2, flow dividing part;21, first flow dividing plate;22, second flow dividing plate;23, third flow dividing plate;24, connecting piece;25, inverted V-shaped connecting part;26, U-shaped connecting piece;27, circular protrusion;28, flow guiding groove;3, submarine cable jacket;31, arc-shaped connecting sheet;4, submarine cable. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] It should be noted that all directionality indications such as first, second, upper, lower, left, right, front, back, and the like in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, and the like between components in a certain specific posture as shown in the drawings, and if the specific posture changes, the directionality indications also change accordingly.

[0027] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the fact that a person skilled in the art can implement them, and when the combination of technical solutions contradicts each other or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0028] The present application provides a kind of dynamic protection device applied to suspension cable, as shown in figure Figures 1-3 It includes: multiple protection units, multiple protection units are used to set in the outside of submarine cable 4 and sequentially arranged along the extension direction of submarine cable 4, protection unit includes the outer protection part 1, shunt part 2 and submarine cable jacket 3 arranged in order from outside to inside, outer protection part 1, shunt part 2 and submarine cable jacket 3 are coaxially arranged, shunt part 2 is hollow structure, the outside of shunt part 2 is hinged with outer protection part 1, the inside of shunt part 2 is connected with submarine cable jacket 3, submarine cable jacket 3 is used to set on submarine cable 4, outer protection part includes multiple guard plates, and guard plate is arc-shaped sheet structure.Through the setting of multiple protection units, multiple protection units are used to set in the outside of submarine cable 4 and sequentially arranged along the extension direction of submarine cable 4, protection unit includes the outer protection part 1, shunt part 2 and submarine cable jacket 3 arranged in order from outside to inside, outer protection part 1, shunt part 2 and submarine cable jacket 3 are coaxially arranged, shunt part 2 is hollow structure, the outside of shunt part 2 is hinged with outer protection part 1, the inside of shunt part 2 is connected with submarine cable jacket 3, submarine cable jacket 3 is used to set on submarine cable 4;Through the shunt of hollow shunt part 2 and the shunt of flow guide groove 28, multiple protection units are used to set in the outside of submarine cable 4 and sequentially arranged along the extension direction of submarine cable 4, realize multilevel reduction shunt, and the inhibition effect is good, the incoming flow intensity is greatly reduced, and the number of protection units and the specific adjustment of unit spacing can be adjusted according to different sea conditions, so that the adaptability is strong;The outside of shunt part 2 is hinged with outer protection part 1, and the flow following swing of outer protection part 1 is used in wake region, the formation of wake vortex is destroyed, the effect of inhibiting vortex-induced vibration is good, so as to play the role of protecting submarine cable 4.

[0029] The outer protection part 1 can be made of polyethylene material. The existing mechanical suppression device is made of metal material, has large density and high quality, and has high production and subsequent installation and implementation cost. In addition, the existing mechanical suppression device is prone to electrochemical corrosion in a complex marine environment, and the protection plate 12 needs to be replaced regularly. Compared with the traditional mechanical suppression device, the outer protection part 1 is made of polyethylene material. The polyethylene material has soft texture, corrosion resistance, light weight, and low processing cost. The outer protection part 1 has good flexibility and light weight, and can swing with the sea current when the sea current passes, thereby achieving good suppression of vortex-induced vibration.

[0030] As shown in Figure 3 In the dynamic protection device applied to the suspension and span submarine cable, the shunt part 2 includes a first shunt plate 21, a second shunt plate 22 and a third shunt plate 23. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by a connecting piece 24 to form a triangular structure. The triangular structure has good stability, reduces the change of the flow direction angle of the water flow, enhances the shunt effect, and allows the water flow to pass through the area between the outer protection part 1 and the shunt part 2, thereby achieving good suppression of vortex-induced vibration. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled by the connecting piece 24, which greatly reduces the cost and is convenient for storage, transportation and installation, and accelerates the module manufacturing construction progress. The connecting piece 24 is a V-shaped connecting piece 24. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by the V-shaped connecting piece 24 in a threaded manner, so that the first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled together in a threaded manner, thereby facilitating installation.

[0031] To achieve good suppression of vortex-induced vibration, the dynamic protection device applied to the suspension and span submarine cable includes a shunt part 2 and an outer protection part 1. The shunt part 2 includes a first shunt plate 21, a second shunt plate 22 and a third shunt plate 23. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by a connecting piece 24 to form a triangular structure. The triangular structure has good stability, reduces the change of the flow direction angle of the water flow, enhances the shunt effect, and allows the water flow to pass through the area between the outer protection part 1 and the shunt part 2, thereby achieving good suppression of vortex-induced vibration. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled by the connecting piece 24, which greatly reduces the cost and is convenient for storage, transportation and installation, and accelerates the module manufacturing construction progress. The connecting piece 24 is a V-shaped connecting piece 24. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by the V-shaped connecting piece 24 in a threaded manner, so that the first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled together in a threaded manner, thereby facilitating installation.

[0032] In the dynamic protection device applied to the suspension and span submarine cable, the shunt part 2 includes a first shunt plate 21, a second shunt plate 22 and a third shunt plate 23. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by a connecting piece 24 to form a triangular structure. The triangular structure has good stability, reduces the change of the flow direction angle of the water flow, enhances the shunt effect, and allows the water flow to pass through the area between the outer protection part 1 and the shunt part 2, thereby achieving good suppression of vortex-induced vibration. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled by the connecting piece 24, which greatly reduces the cost and is convenient for storage, transportation and installation, and accelerates the module manufacturing construction progress. The connecting piece 24 is a V-shaped connecting piece 24. The first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are sequentially connected by the V-shaped connecting piece 24 in a threaded manner, so that the first shunt plate 21, the second shunt plate 22 and the third shunt plate 23 are assembled together in a threaded manner, thereby facilitating installation. Figure 3As shown, the first diverter plate 21, the second diverter plate 22, and the third diverter plate 23, along with the inverted V-shaped connecting part 25, are integrally formed. The inverted V-shaped connecting part 25 is provided at the middle position of the outer side of the first diverter plate 21, the second diverter plate 22, and the third diverter plate 23. The inverted V-shaped connecting part 25 is then hinged to the outer protective part 1, allowing the outer protective part 1 to swing in the wake region. Compared to existing mechanical suppression devices that mostly deal with the incoming flow directly and then cause subsequent damage, the dynamic protection device for suspended submarine cables provided by this utility model utilizes the triangular hollow diverter part 2, the hollow inverted V-shaped connecting part 25, and multiple protection units arranged in a staggered manner to achieve multi-level flow reduction and diversion, resulting in a better suppression effect.

[0033] Furthermore, in the dynamic protection device for suspended submarine cables provided by this utility model, the two ends of the inverted V-shaped connecting part 25 are connected to the outer sheath 1 through U-shaped connectors 26. One end of the U-shaped connector 26 is hinged to the inverted V-shaped connecting part 25, and the other end of the U-shaped connector 26 is fixedly connected to the outer sheath 1. By setting U-shaped connectors 26 at both ends of the inverted V-shaped connecting part 25, the outer sheath 1 can swing while being fixed, thereby enhancing the destructive effect on the wake and suppressing vortex-induced vibration.

[0034] Preferably, in the dynamic protection device for suspended submarine cables provided by this utility model, a circular protrusion 27 is provided at the contact position between the inverted V-shaped connector 25 and the outer sheath 1. By providing the circular protrusion 27, the inverted V-shaped connector 25 and the outer sheath 1 can fit more closely, allowing the outer sheath 1 to have space to swing with the ocean current.

[0035] like Figure 3 As shown, in the dynamic protection device for suspended submarine cables provided by this utility model, the outer protective part 1 includes multiple protective plates 12. The protective plates 12 are arc-shaped sheet structures. The multiple protective plates 12 are arranged in a circumferential array. The two ends of the protective plates 12 are hinged to the inverted V-shaped connecting parts 25. Each protective plate 12 is hinged to its corresponding inverted V-shaped connecting part 25. The multiple arc-shaped outer protective plates 12 are arranged in a circumferential array to form a complete circular structure, which can resist the impact of incoming currents from all directions of the submarine cable 4 and control the movement amplitude of the submarine cable 4. Existing mechanical suppression devices, due to the extensive use of metal materials, have high density and weight, resulting in high production and subsequent installation costs. They are also prone to electrochemical corrosion in complex marine environments, requiring periodic replacement of the protective plate 12. Compared to traditional mechanical suppression devices, the outer protective part 1 is made of polyethylene material. Polyethylene material is soft, corrosion-resistant, and lightweight, which also reduces processing costs. While ensuring strength, it is flexible and lightweight, allowing the outer protective part 1 to sway with the ocean current, further achieving a good effect of suppressing vortex-induced vibration.

[0036] In addition, in the dynamic protection device applied to the suspension spanning submarine cable, the two sides of the inverted V-shaped connecting part 25 are provided with flow guide grooves 28. By arranging the flow guide grooves 28, the sea current is divided and damaged, the flow impact is greatly reduced, the flow velocity is reduced, and finally the inhibition effect is achieved, so as to protect the submarine cable 4.

[0037] Further, in the dynamic protection device applied to the suspension spanning submarine cable, the two sides of the outer protection part 1 are provided with arc-shaped grooves 11 corresponding to the flow guide grooves 28. Similarly, the arc-shaped grooves 11 corresponding to the flow guide grooves 28 are arranged to facilitate the suppression of vortex-induced vibration.

[0038] As shown in Figure 1 and Figure 3 , in the dynamic protection device applied to the suspension spanning submarine cable, the submarine cable jacket 3 comprises a plurality of arc-shaped connecting plates 31, the arc-shaped connecting plates 31 are connected with the flow dividing part 2 through threads, and the plurality of arc-shaped connecting plates 31 form a whole circle structure for sleeving on the submarine cable 4. By arranging the plurality of arc-shaped connecting plates 31, the submarine cable 4 is assembled and wrapped to achieve the purpose of protecting the submarine cable 4, and the installation and fixation of the whole device are realized.

[0039] Preferably, in the dynamic protection device applied to the suspension spanning submarine cable, as shown in Figure 1 and Figure 2 , a plurality of protection units are arranged on the outer side of the submarine cable 4 and arranged in sequence along the extension direction of the submarine cable 4, and the adjacent two protection units are arranged in a staggered manner according to the angle change, the plurality of protection units are arranged in a spiral shape, and the angle gradient according to the actual environmental working condition is arranged in a staggered manner, so that the plurality of protection units are arranged in a spiral shape, and the flow guiding effect similar to the spiral column plate is achieved to strengthen the flow guiding effect. The number of each protection unit can be customized according to the sea current strength and the flow basin environment, and the gap between the adjacent protection units can be changed, and the installation deflection angle of the protection unit can be changed in a gradient manner, so that the plurality of protection units are arranged in a spiral shape, and the separation and inhibition effect of the water flow are further realized to protect the submarine cable 4.

[0040] The installation process of the dynamic protection device applied to the suspension and span submarine cable is as follows: collecting marine environment data of the submarine cable 4 laying area, such as flow velocity, direction, tide, ocean current and other information, combining with the characteristics of the submarine cable 4 to design the specifications, installation position and layout of the protection device. The construction ship is positioned above the submarine cable 4, and the position of the submarine cable 4 is accurately determined by using the positioning system and detection equipment on the ship. The surface of the submarine cable 4 is simply cleaned to create good conditions for installing the protection device. In addition, the various guard plates 12 of the outer protection part 1 and the various shunt plates of the shunt part 2 can be assembled in advance, the arc-shaped connecting plates 31 of the submarine cable clamp sleeve 3 are attached to the submarine cable 4 along the extension direction of the submarine cable 4 according to the preset device number and turning angle, the various shunt plates are fastened and locked by bolts through the connecting piece 24, the attachment condition is checked while installing, the connection loosening and device tilting conditions are adjusted and reinforced in time, and thus the installation is completed.

[0041] It should be understood that the above description of the specific embodiments of the utility model is only for the purpose of illustrating the technical route and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, but the utility model is not limited to the above specific implementation mode. Any changes or modifications made within the scope of the claims of the utility model should be covered within the protection scope of the utility model.

Claims

1. A dynamic protection device applied to a suspended sea cable, characterized in that, The application relates to a protection unit for submarine cable, which comprises a plurality of protection units, the protection units are arranged on the outer side of a submarine cable (4) and sequentially arranged along the extension direction of the submarine cable (4), the protection unit comprises an outer protection part (1), a flow distribution part (2) and a submarine cable jacket (3) which are sequentially arranged from outside to inside, the outer protection part (1), the flow distribution part (2) and the submarine cable jacket (3) are coaxially arranged, the flow distribution part (2) is in a hollow structure, the outer side of the flow distribution part (2) is hinged to the outer protection part (1), the inner side of the flow distribution part (2) is connected to the submarine cable jacket (3), the submarine cable jacket (3) is arranged on the submarine cable (4), the outer protection part (1) is made of polyethylene material, and the outer protection part (1) comprises a plurality of protection plates (12), the protection plates (12) are in arc-shaped sheet structures.

2. A dynamic protection device for a spanned submarine cable according to claim 1, characterized in that, The flow distribution part (2) comprises a first flow distribution plate (21), a second flow distribution plate (22) and a third flow distribution plate (23), the first flow distribution plate (21), the second flow distribution plate (22) and the third flow distribution plate (23) are sequentially connected through a connecting piece (24) to form a triangular structure.

3. A dynamic protection device for a spanned submarine cable according to claim 2, characterized in that, The flow distribution part (2) further comprises an inverted V-shaped connecting part (25), the outer side of the first flow distribution plate (21), the second flow distribution plate (22) and the third flow distribution plate (23) is provided with the inverted V-shaped connecting part (25), and the first flow distribution plate (21), the second flow distribution plate (22) and the third flow distribution plate (23) are connected to the outer protection part (1) through the inverted V-shaped connecting part (25).

4. A dynamic protection device for a spanned submarine cable according to claim 3, characterized in that, The two ends of the inverted V-shaped connecting part (25) are connected to the outer protection part (1) through a U-shaped connecting piece (26), one end of the U-shaped connecting piece (26) is hinged to the inverted V-shaped connecting part (25), and the other end of the U-shaped connecting piece (26) is fixedly connected to the outer protection part (1).

5. A dynamic protection device for a spanned submarine cable according to claim 3, characterized in that, The contact position of the inverted V-shaped connecting part (25) and the outer protection part (1) is provided with a circular protrusion (27).

6. A dynamic protection device for a spanned submarine cable according to claim 3, characterized in that, Flow guide grooves (28) are formed on the two sides of the inverted V-shaped connecting part (25).

7. A dynamic protection device for a spanned submarine cable according to claim 6, characterized in that, Arc-shaped grooves (11) corresponding to the flow guide grooves (28) are formed on the two sides of the outer protection part (1).

8. A dynamic protection device for a spanned submarine cable according to claim 3, characterized in that, The plurality of protection plates (12) are arranged in a circumferential array, and the two ends of the protection plates (12) are hinged to the inverted V-shaped connecting part (25).

9. The dynamic protection device for a spanned submarine cable according to claim 1, characterized in that, The submarine cable jacket (3) comprises a plurality of arc-shaped connecting pieces (31), the arc-shaped connecting pieces (31) are connected to the flow distribution part (2) through threads, and the plurality of arc-shaped connecting pieces (31) form a whole circle structure for being arranged on the submarine cable (4).

10. The dynamic protection device for a spanned submarine cable according to claim 1, characterized in that, The two adjacent protection units are arranged in a staggered manner with an angle change, and the plurality of protection units are arranged in a spiral shape.

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