Polypropylene insulated submarine composite cable
By employing high-purity cathode copper conductors, silicone insulation layers, polyurethane wrapping layers, and multi-layer protective structures in submarine composite cables, the problems of poor waterproofing, weak compressive strength, and short lifespan have been solved, achieving higher conduction efficiency, mechanical strength, and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI HUASHANG CABLE TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-16
AI Technical Summary
Existing submarine composite cables suffer from poor waterproofing, weak compressive strength, and short lifespan.
The structure employs a high-purity cathode copper conductor layer, an organic silicon insulating layer, a multi-core optical fiber spiral winding, a polyurethane wrapping layer, a double-layer water-blocking structure, a copper and aluminum-plastic composite tape metal sheath layer, and an armor layer interwoven with steel tape and steel wire, forming a multi-layer protective structure.
It improves the cable's conductivity and mechanical strength, enhances its waterproof performance and resistance to external damage, and extends the cable's service life.
Smart Images
Figure CN224366569U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable technology, and in particular relates to a polypropylene insulated submarine composite cable. Background Technology
[0002] Submarine fiber optic composite cables combine power cables with optical units to achieve synchronous transmission of electrical energy and communication signals. They are suitable for scenarios such as distant islands, cross-sea military facilities, and offshore oil platforms. Their high strength, corrosion resistance, and electromagnetic interference resistance can meet the needs of extreme deep-sea environments.
[0003] Currently, existing submarine cables consist of a core structure, optical fibers, and a protective structure. The protective structure is generally divided into three main categories based on its function: insulation layer, water-blocking layer, and armor layer. These structures serve to fix the conductors and optical fibers and protect their structure. The choice of materials and manufacturing processes significantly impact cable performance and cost. For example, lead sheaths are commonly used for water-blocking layers. This material has poor fatigue resistance, and its large size and weight result in poor waterproofing, weak compressive strength, and are detrimental to cable lifespan and increased cable diameter.
[0004] In summary, existing submarine composite cables suffer from poor waterproofing, weak compressive strength, and short lifespan. Utility Model Content
[0005] This invention provides a polypropylene insulated submarine composite cable, which can solve the problems of poor waterproof effect, weak compressive strength and short cable life of existing submarine composite cables.
[0006] To achieve the above objectives, a polypropylene insulated submarine composite cable, comprising a cable core structure, is provided according to an embodiment of the first aspect of this utility model.
[0007] The cable core structure includes a conductor layer and an insulation layer disposed on the conductor layer. Multiple optical fibers are disposed inside the conductor layer, and a wrapping layer is disposed outside the cable core structure.
[0008] Also includes:
[0009] An outer protective structure, comprising a protective layer, an armor layer, and a water-blocking structural layer, wherein the protective layer comprises a metal sheath layer, an inner sheath layer, and an outer sheath layer, and the inner sheath layer is wrapped around the strap layer;
[0010] The water-blocking structure layer is divided into an inner water-blocking layer and an outer water-blocking layer. The inner water-blocking layer is wrapped around the outer side of the inner sheath layer. The metal sheath layer is wrapped around the outer side of the inner water-blocking layer. The outer sheath layer is wrapped around the outer side of the metal sheath layer. The armor layer is disposed between the outer sheath layer and the metal sheath layer. The outer water-blocking layer is disposed between the armor layer and the outer sheath layer.
[0011] A further improvement is that the wrapping layer is made of polyurethane, the insulating layer is made of polypropylene, and the conductor layer includes several arrays of conductors, each of which is made of high-purity cathode copper.
[0012] A further improvement is that the insulating layer is made of silicone material and is wrapped around the outside of each conductor.
[0013] A further improvement is that the multi-core optical fibers are spirally wound around each conductor, and silicone is filled between each multi-core optical fiber and the conductor.
[0014] A further improvement is that the outer sheath and the inner sheath are made of high-density polypropylene.
[0015] A further improvement is that the metal sheath layer is made of copper and aluminum-plastic composite strip.
[0016] A further improvement is that the inner water-blocking layer is made of high-efficiency water-blocking yarn, and the outer water-blocking layer is made of water-blocking tape.
[0017] A further improvement is that the armor layer is composed of interwoven steel strips and steel wires, which wrap around the outside of the metal sheath layer.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] (1) This utility model uses high-purity cathode copper for several conductors in the conductor layer, which can reduce impedance and improve conduction efficiency. The insulation layer is made of silicone and is wrapped around the outside of each conductor. Multi-core optical fibers are spirally wound around each conductor, and silicone is filled between each multi-core optical fiber and the conductor to reduce mechanical wear. By setting a wrapping layer on the outside of the cable core structure, the wrapping layer is made of polyurethane. Polyurethane has good mechanical properties and corrosion resistance, which can provide additional protection for the internal structure of the cable and ensure the safety and stability of power transmission.
[0020] (2) This utility model designs an external protective structure consisting of a sheath, an armor layer, and a water-blocking structure layer. The water-blocking structure layer is divided into an inner water-blocking layer and an outer water-blocking layer. The sheath includes a metal sheath layer, an inner sheath layer, and an outer sheath layer. First, the outer and inner sheath layers are designed to be made of high-density polypropylene, which has good wear resistance, oil resistance, flame retardancy, and seawater resistance, further protecting the cable from corrosion and external damage in the marine environment and improving the cable's service life on the seabed. The metal sheath layer is made of copper and aluminum-plastic composite tape. Because copper has better conductivity, the shielding effectiveness will be further improved when the two are combined, and the isolation effect against electromagnetic interference will be better, which can better ensure the stability and purity of signal transmission. At the same time, copper has high strength, and the overall tensile strength will be significantly improved after being combined with aluminum-plastic composite tape. This makes the composite material able to withstand greater force when subjected to external tension without breaking, enhancing the durability and reliability of the material. Aluminum-plastic composite tape inherently possesses certain wear resistance and folding resistance, and the addition of copper further enhances these properties. Furthermore, the use of a double-composite armor layer enhances the cable's resistance to external damage and extends its service life.
[0021] (3) In this utility model, the inner water-blocking layer of the water-blocking structure layer is made of high-efficiency water-blocking yarn, and the outer water-blocking layer is made of water-blocking tape. When the cable is used, the water-blocking tape and the high-efficiency water-blocking yarn expand when exposed to water to form a longitudinal water-blocking barrier; at the same time, with the cooperation of the metal sheath layer, a sealing barrier is formed, further improving the waterproof performance of the composite cable. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the cable of this utility model;
[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of each functional layer of the cable of this utility model.
[0024] Marked in the image:
[0025] 1. Cable core structure; 11. Conductor layer; 12. Insulation layer;
[0026] 2. Packaging layer;
[0027] 3. Outer protective structure; 31. Sheath; 311. Metal sheath layer; 312. Inner sheath layer; 313. Outer sheath layer; 32. Armor layer; 33. Water-blocking structure layer; 331. Inner water-blocking layer; 332. Outer water-blocking layer. Detailed Implementation
[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] like Figure 1 and Figure 2 As shown, a polypropylene insulated submarine composite cable includes a cable core structure 1.
[0030] The cable core structure 1 includes a conductor layer 11 and an insulation layer 12 disposed on the conductor layer 11. Multiple optical fibers are disposed inside the conductor layer 11. The cable core structure 1 is surrounded by a wrapping layer 2 made of polyurethane. Polyurethane has good mechanical properties and corrosion resistance, and can provide additional protection for the internal structure of the cable.
[0031] Specifically, the conductor layer 11 includes several arrays of conductors, each conductor being made of high-purity cathode copper, which can reduce impedance and improve conduction efficiency. The insulating layer 12 is made of silicone material and is wrapped around the outside of each conductor.
[0032] It should be noted that the multi-core optical fibers are spirally wound around each conductor, and silicone is filled between each multi-core optical fiber and the conductor to reduce mechanical wear.
[0033] Specifically, the insulation layer 12 is made of polypropylene. During cable production, it is wrapped around the conductor through an extrusion process to form a uniform and dense insulation layer 12, ensuring the safety and stability of power transmission.
[0034] It also includes: outer protective structure 3, which includes a protective layer 31, an armor layer 32 and a water-blocking structure layer 33. The protective layer 31 includes a metal sheath layer 311, an inner sheath layer 312 and an outer sheath layer 313. The inner sheath layer 312 is wrapped around the wrapping tape layer 2.
[0035] The water-blocking structure layer 33 is divided into an inner water-blocking layer 331 and an outer water-blocking layer 332. The inner water-blocking layer 331 is wrapped around the outer side of the inner sheath layer 312, the metal sheath layer 311 is wrapped around the outer side of the inner water-blocking layer 331, the outer sheath layer 313 is wrapped around the outer side of the metal sheath layer 311, the armor layer 32 is disposed between the outer sheath layer 313 and the metal sheath layer 311, and the outer water-blocking layer 332 is disposed between the armor layer 32 and the outer sheath layer 313.
[0036] Specifically, the outer sheath layer 313 and the inner sheath layer 312 are made of high-density polypropylene, which has good wear resistance, oil resistance, flame retardancy and seawater resistance, further protecting the cable from corrosion and external damage in the marine environment and improving the cable's service life on the seabed.
[0037] It should be noted that the outer sheath layer 313 and the inner sheath layer 312 can also be made of polyvinyl chloride;
[0038] Specifically, the metal sheath layer 311 is composed of copper and aluminum-plastic composite tape. Because copper has better conductivity, the shielding effectiveness is further improved when the two are combined, resulting in better isolation from electromagnetic interference and better ensuring the stability and purity of signal transmission. At the same time, copper has high strength, and when combined with the aluminum-plastic composite tape, the overall tensile strength is significantly improved. This allows the composite material to withstand greater forces when subjected to external tension without easily breaking, enhancing the material's durability and reliability. The aluminum-plastic composite tape itself has certain wear resistance and folding resistance, and the addition of copper further improves these properties.
[0039] As a preferred embodiment, the inner water-blocking layer 331 is made of high-efficiency water-blocking yarn, and the outer water-blocking layer 332 is a water-blocking tape. When the cable is used, the water-blocking tape and the high-efficiency water-blocking yarn expand when exposed to water to form a longitudinal water-blocking barrier; at the same time, with the cooperation of the metal sheath layer 311, a sealing barrier is formed, further improving the waterproof performance of the composite cable.
[0040] Specifically, the armor layer 32 is composed of interwoven steel strips and steel wires, wrapped around the outside of the metal sheath layer 311. The double composite armoring enhances the cable's resistance to external damage and extends its service life.
[0041] like Figures 1 to 2 As shown in this embodiment, it should also be noted that the actual dimensions of each component in the application document are selected and installed according to the actual needs on site. Furthermore, the working principle has been disclosed; this application document only addresses the shortcomings of existing submarine composite cables, such as poor waterproofing, weak compressive strength, and short cable life, and does not involve other aspects. The working principle of this polypropylene insulated submarine composite cable is described below:
[0042] In practical field applications, this novel cable design utilizes high-purity cathode copper for several conductors in conductor layer 11. This material reduces impedance and improves conduction efficiency. Insulation layer 12 is made of silicone and wraps around the outside of each conductor. Multi-core optical fibers are spirally wound around each conductor, with silicone filling the space between each fiber and conductor to reduce mechanical wear. A wrapping layer 2, made of polyurethane, is provided outside the cable core structure 1. Polyurethane possesses excellent mechanical properties and corrosion resistance, providing additional protection for the cable's internal structure and ensuring the safety and stability of power transmission.
[0043] The outer protective structure 3 is designed to consist of a sheath 31, an armor layer 32, and a water-blocking structural layer 33. The water-blocking structural layer 33 is divided into an inner water-blocking layer 331 and an outer water-blocking layer 332. The sheath 31 includes a metal sheath layer 311, an inner sheath layer 312, and an outer sheath layer 313. Firstly, the outer sheath layer 313 and the inner sheath layer 312 are designed to be made of high-density polypropylene, which has good wear resistance, oil resistance, flame retardancy, and seawater resistance, further protecting the cable from corrosion and external damage in the marine environment and improving the cable's service life on the seabed. The metal sheath layer 311 is made of copper and aluminum-plastic composite tape. Because copper has better conductivity, the shielding effectiveness is further improved when the two are combined, resulting in better isolation of electromagnetic interference and better ensuring the stability and purity of signal transmission. Simultaneously, copper has high strength, and when combined with the aluminum-plastic composite tape, the overall tensile strength is significantly improved. This allows the composite material to withstand greater forces under tensile stress without easily breaking, enhancing its durability and reliability. The aluminum-plastic composite tape itself possesses certain wear resistance and folding resistance, and the addition of copper further improves these properties. Simultaneously, with the use of armor layer 32, the double composite armoring enhances the cable's resistance to external damage and extends its service life.
[0044] Furthermore, the inner water-blocking layer 331 of the water-blocking structure layer 33 is made of high-efficiency water-blocking yarn, and the outer water-blocking layer 332 is made of water-blocking tape. When the cable is used, the water-blocking tape and the high-efficiency water-blocking yarn expand when exposed to water to form a longitudinal water-blocking barrier; at the same time, with the cooperation of the metal sheath layer 311, a sealing barrier is formed, further improving the waterproof performance of the composite cable.
[0045] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.
Claims
1. A polypropylene insulated submarine composite cable, comprising a cable core structure (1); The cable core structure (1) includes a conductor layer (11) and an insulation layer (12) disposed on the conductor layer (11). The conductor layer (11) contains multiple optical fibers, and the cable core structure (1) is covered with a wrapping layer (2). Its features are, Also includes: The outer protective structure (3) includes a protective layer (31), an armor layer (32) and a water-blocking structure layer (33). The protective layer (31) includes a metal sheath layer (311), an inner sheath layer (312) and an outer sheath layer (313). The inner sheath layer (312) is wrapped around the strap layer (2). The water-blocking structure layer (33) is divided into an inner water-blocking layer (331) and an outer water-blocking layer (332). The inner water-blocking layer (331) is wrapped around the outer side of the inner sheath layer (312). The metal sheath layer (311) is wrapped around the outer side of the inner water-blocking layer (331). The outer sheath layer (313) is wrapped around the outer side of the metal sheath layer (311). The armor layer (32) is disposed between the outer sheath layer (313) and the metal sheath layer (311). The outer water-blocking layer (332) is disposed between the armor layer (32) and the outer sheath layer (313).
2. The polypropylene insulated submarine composite cable according to claim 1, characterized in that, The wrapping layer (2) is made of polyurethane, the insulating layer (12) is made of polypropylene, and the conductor layer (11) includes several arrays of conductors, each of which is made of high-purity cathode copper.
3. The polypropylene insulated submarine composite cable according to claim 2, characterized in that, The insulating layer (12) is made of silicone material and is wrapped around the outside of each conductor.
4. The polypropylene insulated submarine composite cable according to claim 2, characterized in that, The multi-core optical fibers are spirally wound around each conductor, and silicone is filled between each multi-core optical fiber and the conductor.
5. The polypropylene insulated submarine composite cable according to claim 1, characterized in that, The outer sheath layer (313) and the inner sheath layer (312) are made of high-density polypropylene.
6. The polypropylene insulated submarine composite cable according to claim 5, characterized in that, The metal sheath layer (311) is made of copper and aluminum-plastic composite strip.
7. The polypropylene insulated submarine composite cable according to claim 1, characterized in that, The inner water-blocking layer (331) is made of high-efficiency water-blocking yarn, and the outer water-blocking layer (332) is a water-blocking tape.
8. The polypropylene insulated submarine composite cable according to claim 1, characterized in that, The armor layer (32) is composed of interwoven steel strips and steel wires, and is wrapped around the outside of the metal sheath layer (311).