Water retaining device, dynamic submarine cable and method for manufacturing dynamic submarine cable

Abstract

The invention provides a water retaining device, a dynamic submarine cable and a method for manufacturing the dynamic submarine cable. The water retaining device comprises two water retaining shells which are in butt joint with each other and arranged in a cooling water tank, mounting grooves are formed in the water retaining shells, and notches are formed in the outer sides of the mounting grooves; and the two water absorbing and retaining pieces are arranged in the mounting grooves of the corresponding water retaining shells respectively, and through holes are formed in the outer sides of the water absorbing and retaining pieces. According to the water retaining device provided by the invention, an effective isolation area is formed in the cooling water tank through the two water retaining shells which are in butt joint with each other. The mounting grooves in the two water retaining shells and the notches in the outer sides of the water retaining shells enable the water retaining shells to tightly clamp the dynamic submarine cable. And the water absorbing and retaining piece in the water retaining device enhances the water flow blocking capability of the water retaining device. The through holes in the water absorbing and retaining pieces can absorb and block water flow splashed from all directions on the premise that the cable is not affected, and the cable sheath is prevented from being in direct contact with the water flow.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cables, and in particular to a water retaining device, a dynamic submarine cable and a method for manufacturing the dynamic submarine cable. Background Art

[0002] There are many technical challenges in the processing of dynamic submarine cables, especially in the production of the inner and / or outer sheath layers. The structure of dynamic submarine cables usually includes an inner sheath and an outer sheath structure, and the thickness of the outer sheath generally reaches or exceeds 8mm. This large diameter and thick sheath structure undoubtedly increases the difficulty of extrusion production.

[0003] In the extrusion production process, the commonly used materials are insulating medium-density or high-density polyethylene. After processing, these materials need to go through a cooling process to solidify their shape and performance. However, in the cooling water tank, due to the effect of water flow, water often splashes onto the surface of the sheath that is still in a hot state. The contact between this water flow and the hot sheath will cause quality abnormalities such as water spots and pits on the surface of the sheath. What's more serious is that these pits may cause sheath breakdown due to local weakness during subsequent spark tests, thereby affecting the overall quality and safety of the cable.

[0004] Therefore, how to effectively solve the surface quality problems such as water marks and water spots on the surface of dynamic submarine cable sheaths has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The invention provides a water retaining device, a dynamic submarine cable and a method for manufacturing the dynamic submarine cable, which are used to solve the surface quality problems such as water marks and water spots on the surface of the dynamic submarine cable sheath.

[0006] The present invention provides a water retaining device, which is applied to dynamic submarine cable processing and comprises: Two mutually butted water retaining shells are arranged in the cooling water tank, a mounting groove is formed in the water retaining shell, and a notch is formed on the outer side of the mounting groove; Two water absorbing and water blocking members are respectively arranged in the mounting grooves corresponding to the water blocking housing, and through holes are formed on the outer sides of the water absorbing and water blocking members; Among them, when the two water-retaining shells are butt-jointed, the two notches form a through hole relative to each other, and the two through holes form a placement space for clamping the dynamic submarine cable in the through hole, so as to block the impact of external water flow on the inner sheath layer and / or outer sheath layer of the dynamic submarine cable during the processing.

[0007] According to a water retaining device provided by the present invention, the notch is a semicircular notch, and the through hole is a semicircular through hole; When the two water retaining shells are butted against each other, the semicircular notches of the two water retaining shells form a circular notch, and the semicircular through holes of the two water absorbing and retaining parts form a circular through hole for clamping the dynamic submarine cable.

[0008] According to a water retaining device provided by the present invention, the inner diameter of the circular through hole is larger than the outer diameter of the inner sheath layer and / or the outer sheath layer on the dynamic submarine cable.

[0009] According to a water retaining device provided by the present invention, a handle is provided on the outer side of the water retaining shell.

[0010] The present invention also provides a dynamic submarine cable, comprising: An optical unit, a cable core, a cabling tape layer, an armor layer, and an inner sheath layer and an outer sheath layer made by processing the water retaining device; the cabling tape layer, the inner sheath layer, the armor layer and the outer sheath layer are sequentially sleeved on the optical unit and the cable core from the inside to the outside.

[0011] According to a dynamic submarine cable provided by the present invention, the cable core comprises: a plurality of metal tape shielding tapes and a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a first water-blocking tape, a second water-blocking tape and a core sheath arranged in sequence from the inside to the outside, and the plurality of metal tape shielding tapes are evenly distributed in the first water-blocking tape or the second water-blocking tape at equal intervals.

[0012] According to a dynamic submarine cable provided by the present invention, the first water-blocking tape, the metal belt shielding tape and the second water-blocking tape are wrapped outside the insulating shielding layer in a seam-wrapped form; the first water-blocking tape and the second water-blocking tape are integrally formed to form a mounting hole for the metal belt shielding tape, and the metal belt shielding tape is fixed to the mounting hole by gluing.

[0013] According to a dynamic submarine cable provided by the present invention, a gap is provided between the cabling tape layer and the optical unit and the cable core, and the gap is filled with the filling unit.

[0014] According to a dynamic submarine cable provided by the present invention, the armor layer comprises: an inner armor layer, a first armor tape layer, an outer armor layer, and a second armor tape layer which are sequentially stacked from inside to outside.

[0015] The present invention also provides a method for making a dynamic submarine cable using the water retaining device, comprising: Prepare an optical unit and a cable core, so that the cable core includes: a plurality of metal tape shielding tapes and a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a first water-blocking tape, a second water-blocking tape and a core sheath arranged in sequence from the inside to the outside, and the plurality of metal tape shielding tapes are evenly distributed in the first water-blocking tape or the second water-blocking tape at equal intervals; Surrounding the optical unit and the cable core, a cable tape layer, an inner sheath layer, an armor layer and an outer sheath layer are sequentially arranged from the inside to the outside, and the inner sheath layer and the outer sheath layer are processed and made by the water retaining device.

[0016] The water retaining device provided by the present invention forms an effective isolation area in the cooling water tank through two water retaining shells that are connected to each other. The mounting grooves on the two water retaining shells and the notches on their outer sides enable them to tightly clamp the dynamic submarine cable. The water-absorbing water retaining parts in the water retaining device enhance its ability to block water flow. The through holes on these water-absorbing water retaining parts enable them to effectively absorb and block water splashing from all directions without affecting the cable. In this way, even in the case of relatively turbulent water flow, the cable sheath can be prevented from directly contacting the water flow. By effectively blocking the impact of external water flow on the surface of the cable sheath, the occurrence of surface quality abnormalities such as water spots and pits is reduced. This not only improves the appearance quality of the cable, but also avoids the risk of sheath breakdown caused by pits, reduces the fluctuation of water flow in the cooling water tank, avoids the surface quality abnormalities such as water ripples and water spots on the sheath surface due to water splashing, and improves the surface quality of the inner sheath layer and / or outer sheath layer of the dynamic submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the water retaining device provided by the present invention.

[0019] Figure 2 The present invention provides a dynamic submarine cable process flow diagram.

[0020] Figure 3 It is one of the schematic diagrams of the metal belt shielding belt arrangement provided by the present invention.

[0021] Figure 4 This is the second schematic diagram of the metal belt shielding belt arrangement provided by the present invention.

[0022] Figure 5The present invention provides a schematic flow chart of a method for making a dynamic submarine cable by using a water retaining device.

[0023] Reference numerals: 10. Water-blocking shell; 110. Notch; 120. Handle; 20. Optical unit; 30. Cable core; 310. Water-blocking conductor; 320. Conductor shielding layer; 330. Insulating layer; 340. Insulating shielding layer; 350. First water-blocking tape; 360. Second water-blocking tape; 370. Core sheath; 380. Metal tape shielding tape; 40. Cabling tape layer; 50. Armor layer; 510. Inner armor layer; 520. First armor tape layer; 530. Outer armor layer; 540. Second armor tape layer; 60. Filling unit; 70. Inner sheath layer; 80. Outer sheath layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0025] Combine the following Figure 1-Figure 5 The invention describes a water retaining device, a dynamic submarine cable and a method for manufacturing a dynamic submarine cable.

[0026] The embodiment of the present invention provides a water retaining device, such as Figure 1 and Figure 2 As shown, the water retaining device is applied to dynamic submarine cable processing, and comprises: two mutually docked water retaining shells 10 and two water absorbing and retaining parts. The two mutually docked water retaining shells 10 are arranged in a cooling water tank, and a mounting groove is formed in the water retaining shell 10, and a notch 110 is formed on the outside of the mounting groove; the two water absorbing and retaining parts are respectively arranged in the mounting grooves of the corresponding water retaining shells 10, and a through hole is formed on the outside of the water absorbing and retaining parts.

[0027] The length of the water retaining shell 10 is the width of the cooling water tank, and the height of the two combined water retaining shells 10 is the height of the cooling water tank. When the two water retaining shells 10 are docked, they can be set in the cooling water tank, and the two notches 110 will form a penetration hole relative to each other. At the same time, the through holes of the two water-absorbing water retaining parts will form a placement space in the penetration hole, and this placement space is used to clamp the dynamic submarine cable. Through such a design, the dynamic submarine cable can be set in the placement space to block the impact of external water flow on the inner sheath layer 70 and / or the outer sheath layer 80 of the dynamic submarine cable during the processing.

[0028] The water retaining device provided in this embodiment forms an effective isolation area in the cooling water tank through two mutually docked water retaining shells 10. The mounting grooves on the two water retaining shells 10 and the notches 110 on the outside thereof enable them to tightly clamp the dynamic submarine cable. The water-absorbing water retaining parts in the water retaining device enhance its ability to block water flow. The through holes on these water-absorbing water retaining parts enable them to effectively absorb and block water flow splashing from all directions without affecting the cable. In this way, even in the case of relatively turbulent water flow, the cable sheath can be prevented from directly contacting the water flow. By effectively blocking the impact of external water flow on the surface of the cable sheath, the occurrence of surface quality abnormalities such as water spots and pits is reduced. This not only improves the appearance quality of the cable, but also avoids the risk of sheath breakdown caused by pits, reduces the fluctuation of water flow in the cooling water tank, avoids the surface quality abnormalities such as water lines and water spots on the sheath surface due to water splashing, and improves the surface quality of the inner sheath layer 70 and / or the outer sheath layer 80 of the dynamic submarine cable.

[0029] In some embodiments, Figure 1 and Figure 2 As shown, the notch 110 is a semicircular notch 110 and the through hole is a semicircular through hole. When the two water retaining shells 10 are butted, the semicircular notches 110 of the two water retaining shells 10 form a circular notch 110, and the semicircular through holes of the two water absorbing and retaining parts form a circular through hole for clamping the dynamic submarine cable.

[0030] In this embodiment, a semicircular notch 110 is provided on the outside of the mounting groove of each water retaining shell 10. Semicircular through holes are also provided on the outside of the water absorbing water retaining member. The semicircular through holes not only allow the dynamic submarine cable to pass through, but also provide the necessary passage without sacrificing the water retaining effect. When the two water retaining shells 10 are docked, their semicircular notches 110 will be combined into a complete circular notch 110. This circular notch 110 provides a stable setting channel for the dynamic submarine cable, ensuring that the cable will not be directly impacted by external water flow during processing. At the same time, the semicircular through holes of the two water absorbing water retaining members will also be combined into a circular clamping space, which tightly wraps the dynamic submarine cable and enhances the water retaining effect.

[0031] In some embodiments, Figure 1 and Figure 2 As shown, the inner diameter of the circular through hole is larger than the outer diameter of the inner sheath layer 70 and / or the outer sheath layer 80 on the dynamic submarine cable. This ensures that the cable can easily pass through the through hole without any obstruction or squeezing. At the same time, it also provides a certain amount of movement space for the cable, which helps to reduce friction and wear caused by the movement of the cable.

[0032] The water-absorbing water-blocking member is made of a water-absorbing sponge, which has good water absorption and can effectively absorb and store water. The width, length and height of the water-absorbing sponge are fully adapted to the mounting groove in the water-blocking housing 10, ensuring that the water-absorbing water-blocking member can be stably installed in the water-blocking housing 10 without affecting its water-blocking effect due to shaking or movement.

[0033] A circular hole 5 mm larger than the outer diameter of the inner sheath layer 70 and / or the outer sheath layer 80 of the dynamic submarine cable is designed at the center of the water-absorbing sponge as a passage for the cable. This design not only ensures that the cable can pass smoothly, but also provides a certain buffer space for the cable, which helps to reduce the wear caused by the friction between the cable and the water-absorbing sponge.

[0034] During the production of dynamic submarine cables, the cable passes through the water retaining shell 10 through the circular hole in the water-absorbing water retaining member. Since the water retaining shell 10 can effectively block the water flow, the water flow speed at the head tends to be stable, thereby avoiding the problems of water lines, water spots, pits and other problems on the sheath surface caused by water droplets splashing. The water absorption performance of the water-absorbing sponge can also absorb and store excess water generated during the production process, further reducing the impact of water on the cable sheath layer.

[0035] In addition, a handle 120 is provided on the outside of the water retaining shell 10 for disassembly of the water retaining plate. The handle 120 is usually arranged on the outside of the water retaining shell 10, so that the operator can directly grasp it from the outside. The shape and size of the handle 120 are designed to be ergonomic to ensure that the operator can easily and comfortably grasp it when disassembling and installing the water retaining shell 10. The material of the handle 120 is usually selected from a sturdy and durable material, such as metal or high-strength plastic, to ensure that it will not lose its function due to wear or damage during long-term use. The design of the handle 120 enables the operator to easily grasp the water retaining shell 10 and take it out of or put it into the cooling water tank. When the water retaining shell 10 needs to be cleaned, maintained or replaced, the presence of the handle 120 greatly simplifies this process.

[0036] An embodiment of the present invention provides a dynamic submarine cable, such as Figures 2 to 4 As shown, the dynamic submarine cable includes: an optical unit 20, a cable core 30, a cabling tape layer 40, an armor layer 50, and an inner sheath layer 70 and an outer sheath layer 80 made by a water retaining device; the cabling tape layer 40, the inner sheath layer 70, the armor layer 50 and the outer sheath layer 80 are sequentially sleeved on the optical unit 20 and the cable core 30 from the inside to the outside.

[0037] In this embodiment, the number of cable cores 30 is three, which are adjacent and abutting to form a triangular structure. This layout not only improves the structural stability of the cable, but also helps to optimize the electrical performance of the cable. The number of optical units 20 is two, which are respectively arranged between two of the cable cores 30. This design enables the optical units 20 to be evenly distributed in the cable, thereby ensuring the transmission quality and stability of the optical signal. The cabling tape layer 40 is located on the periphery of the cable core 30 and the optical unit 20, which plays a role in fixing and protecting these components. By tightly wrapping the cable core 30 and the optical unit 20, the cabling tape layer 40 can ensure their position and stability in the cable. The inner sheath layer 70 and the outer sheath layer 80 are respectively located on the inner and outer sides of the armor layer 50. These two layers of sheaths not only provide additional protection, but also prevent moisture and other harmful substances from invading the interior of the cable. The inner sheath layer 70 and the outer sheath layer 80 are made of a water retaining device, which can avoid surface quality problems such as surface water marks, water spots, pits, etc., and therefore have excellent waterproof performance. The armor layer 50 is located between the inner sheath layer 70 and the outer sheath layer 80, and plays a role in enhancing the mechanical strength and wear resistance of the cable. By adding the armor layer 50, the cable can better withstand various mechanical stresses and impacts in the submarine environment.

[0038] The dynamic submarine cable provided in this embodiment has good water-blocking performance and tensile strength, and can meet the strength requirements of deep water use. The cable sheath made by the water retaining device reduces the occurrence of surface quality abnormalities such as water spots and pits. This not only improves the appearance quality of the cable, but also avoids the risk of sheath breakdown caused by pits, reduces the fluctuation of water flow in the cooling water tank, avoids the surface quality abnormalities such as water lines and water spots on the sheath surface due to water splashing, and improves the surface quality of the inner sheath layer 70 and / or the outer sheath layer 80 of the dynamic submarine cable.

[0039] In some embodiments, Figures 2 to 4 As shown, the cable core 30 includes: a plurality of metal tape shielding tapes 380 and a water-blocking conductor 310, a conductor shielding layer 320, an insulating layer 330, an insulating shielding layer 340, a first water-blocking tape 350, a second water-blocking tape 360 ​​and a core sheath 370 arranged in sequence from the inside to the outside, and the plurality of metal tape shielding tapes 380 are evenly distributed in the first water-blocking tape 350 or the second water-blocking tape 360 ​​at equal intervals.

[0040] Specifically, the inner layer of the water-blocking conductor 310 is coated with a 0.3 mm thick semi-conductive water-blocking tape or an insulating water-blocking tape. This water-blocking tape is longitudinally coated on each layer of the conductor, which effectively improves the water-blocking performance of the conductor. The conductor shielding layer 320 is located between the water-blocking conductor 310 and the insulating layer 330, and it plays the role of uniform electric field, preventing electric field concentration and reducing conductor surface discharge. The insulating layer 330 is uniformly extruded on the conductor shielding layer 320 using ultra-clean water-tree resistant cross-linked polyethylene material. This material has excellent electrical properties and anti-water tree growth ability, and can ensure the long-term stable operation of the cable. The insulating shielding layer 340 is located on the outside of the insulating layer 330, and it also plays the role of uniform electric field and preventing electric field concentration, providing additional electrical protection for the cable. The first water-blocking tape 350 and the second water-blocking tape 360 ​​are provided in the cable core 30, which are respectively located between the outside of the insulating shielding layer 340 and the metal tape shielding tape 380 (or the outside of the metal tape shielding tape 380, depending on the design). The metal tape shielding tape 380 is evenly distributed in the first water blocking tape 350 or the second water blocking tape 360 ​​at equal intervals. This design solves the problem of uneven distribution of metal wires that is easy to occur in the production of the metal tape shielding tape 380. The specifications and quantity of the metal tape shielding tape 380 are designed according to the short-circuit current requirements of the transmission system to ensure that the electrical performance of the cable meets the requirements. The close fit between the first water blocking tape 350 (or the second water blocking tape 360) and the metal tape shielding tape 380 effectively prevents the metal wire marks caused by the expansion of the cable core during operation, thereby improving the service life of the submarine cable. The core sheath 370 is located at the outermost layer of the cable core 30, which plays a role in protecting the cable core 30 from external environment and mechanical damage. The metal tape shielding tape 380 is rolled according to the corresponding packaging regulations and wrapped on the surface of the cable core by a common cable wrapping machine. This production method realizes the synchronous production of metal wire winding and tape wrapping, which significantly improves the efficiency of the production process.

[0041] In some embodiments, Figures 2 to 4As shown, the first water-blocking tape 350, the metal tape shielding tape 380 and the second water-blocking tape 360 ​​are wrapped outside the insulating shielding layer 340 in the form of seam wrapping. The first water-blocking tape 351 and the second water-blocking tape 360 ​​are integrally formed to form a mounting hole for the metal tape shielding tape 380, and the metal tape shielding tape 380 is fixed to the mounting hole by glue. Compared with the traditional spiral wrapping or overlapping wrapping, the seam wrapping form has higher wrapping efficiency and better water-blocking effect. It can reduce the time of debugging the existing metal wire and metal tape while meeting the short-circuit current requirements, thereby improving production efficiency. The metal tape shielding tape 380 is evenly distributed in the first water-blocking tape 350 or the second water-blocking tape 360 ​​at equal intervals. This design ensures the uniformity and stability of the metal tape shielding tape 380 and avoids the problem of uneven distribution of metal wires. The core sheath 370 is extruded on the second water-blocking tape 360 ​​to form a radial water-blocking layer of the phase-separated cable core. This sheath not only protects the cable core 30, but also effectively prevents moisture and other harmful substances from entering the cable from the outside. The design of the radial water-blocking layer enhances the waterproof performance of the cable, allowing the cable to operate stably for a long time in harsh environments such as the seabed.

[0042] In some embodiments, Figures 2 to 4 As shown, a gap is provided between the cable wrapping layer 40 and the optical unit 20 and the cable core 30, and the gap is filled with a filling unit 60. The filling unit 60 generally adopts a water-blocking adhesive. The water-blocking adhesive is a material with excellent water-blocking properties, which can effectively prevent the intrusion of moisture and other harmful substances. The water-blocking adhesive not only has good sealing properties, but also has excellent electrical and mechanical properties, and will not have a negative impact on the overall performance of the cable. The water-blocking adhesive can be tightly filled in the gap to form an effective waterproof barrier to prevent moisture and other harmful substances from invading the inside of the cable from the outside.

[0043] In some embodiments, Figures 2 to 4 As shown, the armor layer 50 includes: an inner armor layer 510, a first armor tape layer 520, an outer armor layer 530, and a second armor tape layer 540, which are stacked sequentially from the inside to the outside. The cabling tape layer 40 is provided with an inner sheath layer 70 of polyethylene.

[0044] In this embodiment, both the inner armor layer 510 and the outer armor layer 530 are made of galvanized medium carbon metal wire. This metal wire has excellent mechanical properties and corrosion resistance, and can meet the requirements of high reliability and long life of submarine cables. The tensile strength of the metal wire is ≥650MPa. Compared with the conventional 6.0mm low-carbon galvanized metal wire, it has better mechanical properties, but the overall weight is reduced. This not only improves the mechanical strength of the cable, but also reduces the weight of the cable, which is beneficial to the transportation and installation of the cable. The first armor tape layer 520 and the second armor tape layer 540 are respectively arranged between the inner armor layer 510 and the outer armor layer 530 and between the outer armor layer 530 and the outer sheath layer 80. They play a role in fixing and protecting the armor layer 50 to prevent the armor layer 50 from being damaged during transportation and use. The cabling tape layer 40 is provided with an inner sheath layer 70 of polyethylene. The inner sheath layer 70 can further protect the internal structure of the cable and prevent moisture and other harmful substances from invading the inside from the outside of the cable. The outer sheath layer 80 is extruded on the second armor tape layer 540. The outer sheath layer 80 is usually made of polyethylene or other materials with excellent weather resistance and corrosion resistance, which can effectively protect the cable from erosion by the external environment.

[0045] This embodiment also provides a method for making a dynamic submarine cable using a water retaining device, such as Figures 1 to 5 As shown, the method comprises the following steps: Step S510: Prepare the optical unit 20 and the cable core 30, so that the cable core 30 includes: a plurality of metal tape shielding tapes 380 and a water-blocking conductor 310, a conductor shielding layer 320, an insulating layer 330, an insulating shielding layer 340, a first water-blocking tape 350, a second water-blocking tape 360 ​​and a core sheath 370 arranged in sequence from the inside to the outside, and the plurality of metal tape shielding tapes 380 are evenly distributed in the first water-blocking tape 350 or the second water-blocking tape 360 ​​at equal intervals.

[0046] Step S520: surrounding the optical unit 20 and the cable core 30, sequentially arranging from the inside to the outside into a cable wrapping layer 40, an inner sheath layer 70, an armor layer 50 and an outer sheath layer 80, wherein the inner sheath layer 70 and the outer sheath layer 80 are made by processing a water retaining device.

[0047] In the production work, first, the optical unit 20 and the cable core 30 are prepared according to the design requirements to ensure that the structure and materials of each layer meet the performance requirements. Then, the optical unit 20 and the cable core 30 are fixed together, and are arranged from the inside to the outside in sequence into a cable tape layer 40, an inner sheath layer 70, an armor layer 50 and an outer sheath layer 80. Among them, the inner sheath layer 70 and the outer sheath layer 80 are processed by a water retaining device. Finally, through a series of inspections and tests, it is ensured that the performance of the cable meets the design requirements and the production of the dynamic submarine cable is completed.

[0048] In this embodiment, the optical unit 20 generally includes an optical fiber and a sheath for protecting the optical fiber. The optical fiber is used to transmit optical signals, while the sheath provides mechanical protection and waterproofing. The cable core 30 is provided with a water-blocking conductor 310, a conductor shielding layer 320, an insulating layer 330, an insulating shielding layer 340, a first water-blocking tape 350, a second water-blocking tape 360 ​​and a core sheath 370 from the inside to the outside. The water-blocking conductor 310 is used to provide conductivity and prevent moisture from invading from the inside of the conductor. The conductor shielding layer 320 is used to evenly distribute the electric field and reduce the damage of the electric field to the insulating layer 330. The insulating layer 330 provides electrical insulation to prevent current from leaking between the conductor and the shielding layer. The insulating shielding layer 340 further protects the insulating layer 330 to prevent external electric field interference. The first water-blocking tape 350 and the second water-blocking tape 360 ​​together constitute a radial water-blocking barrier of the cable to prevent moisture from invading from the outside of the cable. The core sheath 370 provides additional mechanical protection and waterproofing. The metal tape shielding tape 380 is evenly distributed in the first water-blocking tape 350 or the second water-blocking tape 360 ​​at equal intervals to provide electromagnetic shielding and reduce electromagnetic interference. The cable wrapping tape layer 40 is used to fix the optical unit 20 and the cable core 30 together to form a compact cable core structure. The inner sheath layer 70 is made of a water-retaining device to provide preliminary waterproof and mechanical protection functions. The armor layer 50 provides additional mechanical strength and protection to prevent external damage. The outer sheath layer 80 is also made of a water-retaining device to provide ultimate waterproof and mechanical protection to ensure the long-term stable operation of the cable in the submarine environment. Through the application of the water-retaining device, the waterproof performance of the cable has been significantly improved, thereby extending the service life and reliability of the cable.

[0049] It should be noted that, during the processing of the cable core 30 in this embodiment, the first water blocking tape 351 and the second water blocking tape 360 ​​are integrally formed to form a mounting hole for the metal tape shielding tape 380 , and the metal tape shielding tape 380 is fixed to the mounting hole by gluing.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water retaining device, characterized in that: The water retaining device is applied to dynamic submarine cable processing, and comprises: Two mutually butted water retaining shells (10) are arranged in the cooling water tank, a mounting groove is formed in the water retaining shell (10), and a notch (110) is formed on the outside of the mounting groove; Two water absorbing and water blocking members are respectively arranged in the installation grooves corresponding to the water blocking housing (10), and through holes are formed on the outer sides of the water absorbing and water blocking members; When the two water retaining shells (10) are butt-jointed, the two notches (110) relatively form a through hole, and the two through holes form a placement space for clamping the dynamic submarine cable in the through hole, so as to block the impact of external water flow on the inner sheath layer (70) and / or the outer sheath layer (80) of the dynamic submarine cable during processing.

2. The water retaining device according to claim 1, characterized in that: The notch (110) is a semicircular notch (110), and the through hole is a semicircular through hole; When the two water retaining shells (10) are butt-jointed, the semicircular notches (110) of the two water retaining shells (10) form a circular notch (110), and the semicircular through holes of the two water absorbing and retaining parts form a circular through hole for clamping the dynamic submarine cable.

3. The water retaining device according to claim 2, characterized in that: The inner diameter of the circular through hole is greater than the outer diameter of the inner sheath layer (70) and / or the outer sheath layer (80) on the dynamic submarine cable.

4. The water retaining device according to any one of claims 1 to 3, characterized in that: A handle (120) is provided on the outer side of the water retaining housing (10).

5. A dynamic submarine cable, characterized in that: include: An optical unit (20), a cable core (30), a cabling tape layer (40), an armor layer (50), and an inner sheath layer (70) and an outer sheath layer (80) made by processing the water retaining device according to any one of claims 1 to 4; the cabling tape layer (40), the inner sheath layer (70), the armor layer (50) and the outer sheath layer (80) are sequentially sleeved on the optical unit (20) and the cable core (30) from the inside to the outside.

6. The dynamic submarine cable according to claim 5, characterized in that: The cable core (30) comprises: a plurality of metal tape shielding tapes (380) and a water-blocking conductor (310), a conductor shielding layer (320), an insulating layer (330), an insulating shielding layer (340), a first water-blocking tape (350), a second water-blocking tape (360) and a core sheath (370) which are arranged in sequence from the inside to the outside, wherein the plurality of metal tape shielding tapes (380) are evenly distributed in the first water-blocking tape (350) or the second water-blocking tape (360) at equal intervals.

7. The dynamic submarine cable according to claim 6, characterized in that: The first water-blocking tape (350), the metal belt shielding tape (380) and the second water-blocking tape (360) are wrapped around the outside of the insulating shielding layer (340) in a butt-seam wrapping manner; the first water-blocking tape (350) and the second water-blocking tape (360) are integrally formed to form a mounting hole for the metal belt shielding tape (380); and the metal belt shielding tape (380) is fixed to the mounting hole by gluing.

8. The dynamic submarine cable according to claim 5, characterized in that: A gap is provided between the cabling tape layer (40), the optical unit (20) and the cable core (30), and the gap is filled with the filling unit (60).

9. The dynamic submarine cable according to claim 5, characterized in that: The armor layer (50) comprises: an inner armor layer (510), a first armor tape layer (520), an outer armor layer (530), and a second armor tape layer (540) which are sequentially stacked from the inside to the outside.

10. A method for manufacturing a dynamic submarine cable using the water retaining device according to any one of claims 1 to 4, characterized in that: include: An optical unit (20) and a cable core (30) are prepared, so that the cable core (30) comprises: a plurality of metal tape shielding tapes (380) and a water-blocking conductor (310), a conductor shielding layer (320), an insulating layer (330), an insulating shielding layer (340), a first water-blocking tape (350), a second water-blocking tape (360) and a core sheath (370) arranged in sequence from the inside to the outside, and the plurality of metal tape shielding tapes (380) are evenly distributed in the first water-blocking tape (350) or the second water-blocking tape (360) at equal intervals; Surrounding the optical unit (20) and the cable core (30), a cable tape layer (40), an inner sheath layer (70), an armor layer (50) and an outer sheath layer (80) are sequentially arranged from the inside to the outside, and the inner sheath layer (70) and the outer sheath layer (80) are processed by the water retaining device.

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