Underwater cable

Abstract

The utility model discloses an underwater cable, and belongs to the field of cables. An underwater cable comprises a cable core and a water-blocking tape layer wrapping the outer side of the cable core. The water-blocking filling layer is filled between the cable core and the water-blocking tape layer; the fiber protection layer coats the outer side of the water-blocking tape layer; the waterproof sheath comprises a hard polymer layer, a soft polymer layer, a first waterproof coating and a second waterproof coating, the compressive elastic modulus of the hard polymer layer is larger than that of the soft polymer layer, the ratio of the thickness of the hard polymer layer to the thickness of the soft polymer layer is (1-2): (0.8-1.5), the hard polymer layer wraps the outer side of the fiber protection layer, and the first waterproof coating and the second waterproof coating are arranged on the outer side of the fiber protection layer. The first waterproof coating is coated on the outer side of the hard polymer layer, the soft polymer layer is coated on the outer side of the first waterproof coating, and the second waterproof coating is coated on the outer side of the soft polymer layer. The underwater cable has the effect of improving the construction performance of the underwater cable while improving the waterproof performance.

Description

Technical Field

[0001] This application relates to the field of cables, and more particularly to an underwater cable. Background Technology

[0002] Submarine cables, as a crucial component of modern marine engineering and deep-sea resource development, are widely used in power transmission, communication connections, and other fields. With the rapid development of the marine economy and cross-regional collaboration, the demand for underwater cables is increasing daily. The performance of underwater cables directly affects the stable operation of marine equipment and the reliability of data transmission. Especially in the complex and variable deep-sea environment, with extremely high water pressure and low temperatures, ensuring the reliability and durability of cables underwater is paramount.

[0003] Improving the reliability and durability of underwater cables hinges on enhancing their waterproof performance. Currently, the industry standard practice is to add multiple layers of sheathing to the cable surface to enhance its waterproof sealing capabilities. However, these multi-layered sheathing structures are essentially made of stacked materials of the same nature, resulting in poor construction performance and difficult installation. Summary of the Invention

[0004] In order to improve the waterproof performance and the construction performance of underwater cables, this application provides an underwater cable.

[0005] The underwater cable provided in this application adopts the following technical solution:

[0006] An underwater cable includes a cable core, and:

[0007] A water-blocking tape layer is wrapped around the outside of the cable core;

[0008] A water-blocking filling layer is provided between the cable core and the water-blocking tape layer.

[0009] A fiber protective layer covers the outside of the water-blocking strip layer;

[0010] A waterproof sheath includes a rigid polymer layer, a flexible polymer layer, a first waterproof coating, and a second waterproof coating. The compressive elastic modulus of the rigid polymer layer is greater than that of the flexible polymer layer. The thickness ratio of the rigid polymer layer to the flexible polymer layer is (1~2):(0.8~1.5). The rigid polymer layer covers the outside of the fiber protective layer. The first waterproof coating covers the outside of the rigid polymer layer. The flexible polymer layer covers the outside of the first waterproof coating. The second waterproof coating covers the outside of the flexible polymer layer.

[0011] By adopting the above technical solution, the waterproof sheath is divided into a static sealing zone and a dynamic sealing zone through the cooperation of the rigid polymer layer and the soft polymer layer. The thickness ratio of the rigid polymer layer and the soft polymer layer is controlled to form a complementary waterproof sealing performance, resulting in higher durability. It can withstand long-term water pressure and provide sufficient flexibility when laying cables underwater, improving construction performance and laying effect, and helping to buffer the impact of external forces in the underwater environment. In addition, the first waterproof coating and the second waterproof coating provide double protection for the waterproof sheath. When cracks appear in the soft polymer layer, the first waterproof coating can still prevent further water infiltration, ensuring the waterproof effect of the underwater cable.

[0012] Optionally, the compressive elastic modulus of the rigid polymer layer is 800~1000MPa, and the compressive elastic modulus of the soft polymer layer is 2.5~5MPa.

[0013] By adopting the above technical solution, the compressive elastic modulus of the rigid polymer layer and the soft polymer layer are controlled, thereby synergistically improving the sealing performance of the cable surface.

[0014] Optionally, the rigid polymer layer is a thermoplastic polyolefin elastomer layer.

[0015] By adopting the above technical solution, the thermoplastic polyolefin elastomer layer can improve the cable's ability to withstand long-term static pressure, meeting the high durability requirements of materials in static sealing areas.

[0016] Optionally, the soft polymer layer is a silicone rubber layer.

[0017] By adopting the above technical solution, the silicone rubber layer has high elasticity, which can buffer the impact of underwater objects on the cable surface and improve the flexibility during laying and processing, meeting the requirements of high material durability for dynamic sealing areas.

[0018] Optionally, the first waterproof coating is a polyurethane coating.

[0019] By adopting the above technical solution, the polyurethane coating can not only play a water-blocking role, but also improve the interfacial bonding force between the rigid polymer layer and the soft polymer layer, thereby improving the structural stability of the cable.

[0020] Optionally, the second waterproof coating is a fluorinated polyolefin coating.

[0021] By adopting the above technical solution, the fluorinated polyolefin coating has high corrosion resistance and adhesion stability, and can withstand underwater corrosion, especially seawater corrosion, further improving the durability of underwater cables.

[0022] Optionally, the water-blocking filling layer is made of water-blocking yarn.

[0023] By adopting the above technical solution, water-blocking yarn can effectively prevent water from penetrating the cable from the inside.

[0024] Optionally, the fiber protective layer is woven from basalt fibers.

[0025] By adopting the above technical solution, basalt fiber has high strength and can effectively improve the mechanical properties of underwater cables.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. The waterproof sheath of this application, with the cooperation of a rigid polymer layer and a soft polymer layer, is divided into a static sealing zone and a dynamic sealing zone. The thickness ratio of the rigid polymer layer to the soft polymer layer is controlled to form a complementary waterproof sealing performance, resulting in higher durability. It can withstand long-term water pressure and provide sufficient flexibility when laying cables underwater, improving construction performance and laying effect, and helping to buffer the impact of external forces in the underwater environment. In addition, the first waterproof coating and the second waterproof coating provide double protection for the waterproof sheath. When cracks appear in the soft polymer layer, the first waterproof coating can still prevent further water infiltration, ensuring the waterproof effect of the underwater cable.

[0028] 2. This application controls the compressive elastic modulus of the rigid polymer layer and the soft polymer layer to synergistically improve the sealing performance of the cable surface. Attached Figure Description

[0029] Figure 1 This is a cross-sectional structural diagram of an underwater cable according to an embodiment of this application.

[0030] Figure 2 This is a cross-sectional structural diagram of a waterproof sheath for an underwater cable according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Cable core; 11. Conductor; 12. Insulation layer; 2. Water-blocking filling layer; 3. Water-blocking tape layer; 4. Fiber protective layer; 5. Waterproof sheath; 51. Rigid polymer layer; 52. First waterproof coating; 53. Soft polymer layer; 54. Second waterproof coating. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0034] This application discloses an underwater cable. For example... Figure 1 and Figure 2As shown, an underwater cable includes a cable core 1, a water-blocking filling layer 2, a water-blocking tape layer 3, a fiber protective layer 4, and a waterproof sheath 5 arranged sequentially from the inside to the outside. The waterproof sheath 5 includes a rigid polymer layer 51, a first waterproof coating 52, a soft polymer layer 53, and a second waterproof coating 54 arranged sequentially from the inside to the outside.

[0035] The cable core 1 can be provided in one or more ways. In this embodiment, there are multiple cable cores 1, specifically three. The cable core 1 includes a conductor 11 and an insulation layer 12. The conductor 11 can be a copper conductor 11 or an aluminum alloy conductor 11. In this embodiment, it is specifically a copper conductor 11. The insulation layer 12 can be a polyvinyl chloride layer and is wrapped around the outside of the conductor 11.

[0036] The water-blocking tape layer 3 covers the outside of multiple cable cores 1. The water-blocking tape layer 3 is made of water-blocking tape wrapped around it. The water-blocking tape can be a non-woven fabric filled with super absorbent resin, for example, it is composed of two layers of non-woven fabric with a layer of super absorbent resin in between. The water-blocking tape layer 3 can play a role in blocking and waterproofing water inside the underwater cable.

[0037] The water-blocking filling layer 2 is filled between the cable core 1 and the water-blocking tape layer 3. The water-blocking filling layer 2 is made of water-blocking yarn, which can further prevent water from penetrating the cable inside the underwater cable.

[0038] The fiber protective layer 4 is wrapped around the outside of the water-blocking tape layer 3. The fiber protective layer 4 is woven from basalt fiber. Utilizing the high strength of basalt fiber, it plays a role in enhancing the mechanical properties inside the cable. Moreover, the fiber protective layer 4 is located in the middle layer of the cable structure, which plays a good role in structural stability and bears the inward stress transmitted when the cable is subjected to external impact. In addition, basalt fiber has the advantages of electrical insulation and high temperature resistance, and has strong applicability.

[0039] A rigid polymer layer 51 covers the outside of the fiber protective layer 4, a first waterproof coating 52 covers the outside of the rigid polymer layer 51, a soft polymer layer 53 covers the outside of the first waterproof coating 52, and a second waterproof coating 54 covers the outside of the soft polymer layer 53. Specifically, the thickness ratio of the rigid polymer layer 51 to the soft polymer layer 53 is (1~2):(0.8~1.5). In this embodiment, the thickness ratio of the rigid polymer layer 51 to the soft polymer layer 53 is 1:0.8.

[0040] With the cooperation of the rigid polymer layer 51 and the soft polymer layer 53, the waterproof sheath 5 is divided into a static sealing area and a dynamic sealing area. The thickness ratio of the rigid polymer layer 51 to the soft polymer layer 53 is controlled to form a complementary waterproof sealing performance, which is more durable. It can withstand long-term water pressure and provide sufficient flexibility when laying cables underwater, improving construction performance and laying effect, and helping to buffer the impact of external forces in the underwater environment.

[0041] The compressive elastic modulus of the rigid polymer layer 51 is greater than that of the flexible polymer layer 53. Specifically, the compressive elastic modulus of the rigid polymer layer 51 can be 800~1000MPa. If the modulus is too high, it will lead to excessive concentration of interfacial stress, making cracks more likely to occur. If the modulus is too low, it will be difficult to maintain underwater deformation stability. In this embodiment, the compressive elastic modulus of the rigid polymer layer 51 is specifically 800MPa. The compressive elastic modulus of the flexible polymer layer 53 is 2.5~5MPa. In this embodiment, the compressive elastic modulus of the flexible polymer layer 53 is specifically 5MPa to ensure stability and flexibility. Thus, by controlling the compressive elastic modulus of the rigid polymer layer 51 and the flexible polymer layer 53, the sealing performance of the cable surface is synergistically improved.

[0042] In this embodiment, the rigid polymer layer 51 is a thermoplastic polyolefin elastomer layer. Thermoplastic polyolefin elastomer layers have a high modulus while also possessing the elasticity of rubber and excellent weather resistance. This layer improves the cable's ability to withstand long-term static pressure, meeting the high durability requirements of materials in static sealing areas. The soft polymer layer 53 is a silicone rubber layer. Silicone rubber layers have high elasticity, which can buffer the impact of underwater objects on the cable surface and improve flexibility during installation and processing, meeting the high durability requirements of materials in dynamic sealing areas.

[0043] In this embodiment, the first waterproof coating 52 is a polyurethane coating. The polyurethane coating not only acts as a water barrier, but also, being located between the rigid polymer layer 51 and the soft polymer layer 53, its good adhesion improves the interfacial bonding between them, thereby enhancing the structural stability of the cable. The second waterproof coating 54 is a fluorinated polyolefin coating. Fluorinated polyolefin coatings have high corrosion resistance and adhesion stability, capable of withstanding underwater corrosion, especially seawater, making them suitable as the outermost surface of the cable, thus improving the durability of the underwater cable. Furthermore, the first and second waterproof coatings 52 and 54 provide dual protection for the waterproof sheath 5. Even when cracks appear in the soft polymer layer 53, the first waterproof coating 52 can still prevent further water penetration, ensuring the waterproof effect of the underwater cable.

[0044] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An underwater cable, characterized by: Including cable core (1), and: A water-blocking layer (3) is wrapped around the outside of the cable core (1); A water-blocking filling layer (2) is filled between the cable core (1) and the water-blocking tape layer (3); A fiber protective layer (4) is wrapped around the outside of the water-blocking strip layer (3); The waterproof sheath (5) includes a rigid polymer layer (51), a soft polymer layer (53), a first waterproof coating (52), and a second waterproof coating (54). The compressive elastic modulus of the rigid polymer layer (51) is greater than that of the soft polymer layer (53). The ratio of the thickness of the rigid polymer layer (51) to the thickness of the soft polymer layer (53) is (1~2):(0.8~1.5). The rigid polymer layer (51) covers the outside of the fiber protective layer (4). The first waterproof coating (52) covers the outside of the rigid polymer layer (51). The soft polymer layer (53) covers the outside of the first waterproof coating (52). The second waterproof coating (54) covers the outside of the soft polymer layer (53).

2. An underwater cable according to claim 1, characterized in that: The rigid polymer layer (51) has a compressive elastic modulus of 800~1000MPa, and the soft polymer layer (53) has a compressive elastic modulus of 2.5~5MPa.

3. An underwater cable according to claim 1, characterized in that: The rigid polymer layer (51) is a thermoplastic polyolefin elastomer layer.

4. An underwater cable according to claim 1, characterized in that: The soft polymer layer (53) is a silicone rubber layer.

5. An underwater cable according to claim 1, characterized in that: The first waterproof coating (52) is a polyurethane coating.

6. An underwater cable according to claim 1, characterized in that: The second waterproof coating (54) is a fluorinated polyolefin coating.

7. An underwater cable according to claim 1, characterized in that: The water-blocking filling layer (2) is made of water-blocking yarn.

8. An underwater cable according to claim 1, characterized in that: The fiber protective layer (4) is woven from basalt fibers.

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