Optical cable for submarine
The submarine optical cable, designed with multiple shielding and reinforcement layers, solves the problems of interference and tensile strength when laying optical cables inside submarines, achieving stable signal transmission and improved tensile strength.
Patent Information
- Application Number
- CN202520303984.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Optical cables used in submarines are prone to mutual interference when laid internally and have insufficient tensile strength, making them difficult to lay stably in complex environments.
It adopts a multi-layer shielding structure and reinforcement layer design, including a main shielding layer, an auxiliary tensile reinforcement core, a copper core, a nylon tight-closing layer, an aramid reinforcement layer, and an armor layer, combined with a polyurethane sheath, to ensure that the fiber pairs do not interfere with each other and improve their tensile strength.
It effectively prevents external electromagnetic interference, ensures stable fiber optic signal transmission, enhances the tensile strength of the fiber optic cable inside the submarine, and avoids breakage and wear.
Smart Images
Figure CN223770444U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical cables, specifically, it relates to an optical cable for submarines. Background Technology
[0002] Submarine fiber optic cables play a crucial role in modern submarine technology and communication systems, not only ensuring the stealth and safety of submarines, but also improving communication efficiency and battlefield awareness.
[0003] Since submarine optical cables are used to construct a real-time submarine tracking and intrusion early warning system, this system utilizes a distributed optical fiber sensor network to collect and transmit sound signals emitted by the submarine. After signal demodulation, the signals are transmitted to a real-time alarm display terminal to indicate whether a submarine has passed by and to determine the submarine's position, depth, speed, and course. Therefore, multiple optical fibers need to be non-interfering with each other. Secondly, the optical cable needs to be laid inside the complex and ever-changing interior of the submarine, so the optical cable needs to have good tensile strength. In view of this, this utility model is proposed. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an optical cable for submarines.
[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:
[0006] A submarine optical cable includes an outer sheath, an inner sheath, and optical units. The outer sheath is provided with an inner sheath inside, and an armor layer is provided between the inner sheath and the outer sheath. An aramid reinforcing layer is attached to the inner wall of the inner sheath. A main shielding layer is provided inside the aramid reinforcing layer. A main tensile reinforcing core is provided at the center of the main shielding layer. Multiple optical units are arranged in a ring array outside the main tensile reinforcing core.
[0007] Each optical unit includes an auxiliary tensile reinforcing core, a copper filler core, a first shielding layer, and a second shielding layer. The copper filler core is located on both sides of the auxiliary tensile reinforcing core. The copper filler core is used to separate the two sets of optical fiber pairs located on the upper and lower sides of the auxiliary tensile reinforcing core. Each set of optical fiber pairs has two optical fiber cores inside. Each optical fiber core is provided with a nylon tight-closing layer outside. Each set of optical fiber pairs is provided with a second shielding layer outside.
[0008] Optionally, the main shielding layer, the first shielding layer, and the second shielding layer are all made of copper wire braided into layers, with the braiding density of the main shielding layer being 70% to 90%, and the braiding density of the first shielding layer and the second shielding layer being 60% to 80%.
[0009] Optionally, the armor layer is woven from stainless steel wires, and the weaving density of the armor layer is 90% to 95%.
[0010] Optionally, each of the second shielding layers is wrapped with a first water-blocking tape.
[0011] Optionally, the aramid reinforcing layer is woven from aramid fibers, and a second water-blocking tape, a third water-blocking tape, and a fourth water-blocking tape are respectively wrapped around the outer surfaces of the aramid reinforcing layer, the inner sheath, and the armor layer.
[0012] Optionally, the outer sheath and the inner sheath are polyurethane sheaths.
[0013] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:
[0014] Firstly, considering the requirement that submarine optical cables must prevent interference between multiple optical fibers, a first shielding layer is wrapped around the inner core of each optical fiber during the cabling process of each optical unit, and a second shielding layer is wrapped around the outer core of each optical unit. Multiple optical units are also protected within the main shielding layer. This structure makes it difficult for external electromagnetic interference to interfere with the signal transmission within the optical fiber core of the cable. Furthermore, to prevent interference between the two sets of optical fiber pairs within each optical unit, a copper core is designed to separate the two sets of contacting optical fiber pairs. However, this design does not preclude the possibility of interference between the optical fiber pairs. Secondly, considering that the fiber optic cable will inevitably be dragged when being laid in the complex and ever-changing interior of a submarine, the cable needs to have good tensile strength. Each fiber core inside the device can use a nylon tight-closing layer to improve the strength of a single core. Each optical unit adopts an auxiliary tensile reinforcing core and a copper filler core to further improve the tensile strength of the device. In addition, the tensile reinforcing core can be used to distribute the tensile force among multiple optical units. Furthermore, the cable also has a double-layer protective structure with an aramid reinforcing layer and an armor layer, which can further improve the tensile strength of the device to ensure that the cable will not break due to dragging during the laying process.
[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0016] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0017] In the picture:
[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;
[0019] Figure 2This is a schematic diagram of the combined component structure of the optical unit in this utility model;
[0020] Figure 3 for Figure 1 A schematic diagram of the structure of part A in the diagram;
[0021] Figure 4 for Figure 1 A schematic diagram of the structure of part B in the diagram.
[0022] The attached diagram lists the components represented by each number as follows:
[0023] 1. Outer sheath; 2. Inner sheath; 3. Armor layer; 4. Aramid reinforcement layer; 5. Main shielding layer; 6. Main tensile reinforcement core; 7. Auxiliary tensile reinforcement core; 8. Copper filler core; 9. Optical fiber core; 10. Nylon tight-pack layer; 11. Secondary shielding layer; 12. First water-blocking tape; 13. Second water-blocking tape; 14. Third water-blocking tape; 15. Fourth water-blocking tape; 16. First shielding layer.
[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation
[0025] The present invention will now be described in further detail with reference to the accompanying drawings.
[0026] Please see Figures 1 to 4 This utility model provides a technical solution: a submarine optical cable, including an outer sheath 1, an inner sheath 2 and optical units. The inner sheath 2 is provided inside the outer sheath 1. An armor layer 3 is provided between the inner sheath 2 and the outer sheath 1. An aramid reinforcing layer 4 is attached to the inner wall of the inner sheath 2. A main shielding layer 5 is provided inside the aramid reinforcing layer 4. A main tensile reinforcing core 6 is provided at the center inside the main shielding layer 5. Multiple optical units are arranged in a ring array outside the main tensile reinforcing core 6.
[0027] Each optical unit includes an auxiliary tensile reinforcing core 7, a copper filler core 8, a first shielding layer 16, and a second shielding layer 11. The copper filler core 8 is located on both sides of the auxiliary tensile reinforcing core 7, separating the two sets of fiber pairs located on the upper and lower sides of the auxiliary tensile reinforcing core 7. Each set of fiber pairs contains two fiber cores 9, and each fiber core 9 is surrounded by a nylon tight-packing layer 10. Each set of fiber pairs also has a second shielding layer 11. Considering the requirement that submarine optical cables do not interfere with each other, the device wraps the first shielding layer 16 around the fiber cores 9 and the second shielding layer 11 around each optical unit during cable assembly. Multiple optical units are also protected within the main shielding layer 5. Therefore, this structure makes it difficult for external electromagnetic interference to penetrate the internal fibers of the optical cable. Core 9 transmits signals, and to avoid mutual interference between the two sets of optical fiber pairs inside each optical unit, a copper filler core 8 is designed, which can separate the two sets of contacting optical fiber pairs. Inevitably, mutual interference between optical fiber pairs will occur. Secondly, considering that the optical cable needs to be laid in the complex and ever-changing interior of a submarine, the cable will inevitably be dragged. Therefore, the optical cable needs to have good tensile strength. Each optical fiber core 9 inside the device can use a nylon tight-closing layer 10 to improve the strength of a single core. Each optical unit adopts an auxiliary tensile strengthening core 7 and a copper filler core 8, which can help improve the tensile strength of the device. In addition, the tensile strengthening cores can be used to distribute the tensile force among multiple optical units. Furthermore, this optical cable also has a double-layer protective structure with an aramid strengthening layer 4 and an armor layer 3, which can further improve the tensile strength of the device to ensure that the cable will not break due to dragging during the laying process.
[0028] Among them, the main shielding layer 5, the first shielding layer 16 and the second shielding layer 11 are all made of copper wire braided into layers. The braiding density of the main shielding layer 5 is 70% to 90%, and the braiding density of the first shielding layer 16 and the second shielding layer 11 is 60% to 80%. By setting up a multi-layer shielding structure, external electromagnetic waves or electronic equipment interference is prevented.
[0029] Among them, the armor layer 3 is woven from stainless steel wire, and the weaving density of the armor layer 3 is 90% to 95%. By setting the armor layer 3, the tensile strength of the optical cable is further improved.
[0030] Each of the second shielding layers 11 is wrapped with a first water-blocking tape 12. The first water-blocking tape 12 serves to waterproof each individual optical unit. When exposed to water, the waterproof tape expands between the inner sheath 2 and the second shielding layer due to its water-swellable material, thus forming a waterproof barrier to block any cracks.
[0031] Among them, the aramid reinforcing layer 4 is woven from aramid fibers. The outer surfaces of the aramid reinforcing layer 4, the inner sheath 2 and the armor layer 3 are respectively wrapped with a second water-blocking tape 13, a third water-blocking tape 14 and a fourth water-blocking tape 15. By setting the second water-blocking tape 13, the third water-blocking tape 14 and the fourth water-blocking tape 15, the waterproof function of this optical cable is further improved.
[0032] Among them, the outer sheath 1 and the inner sheath 2 are polyurethane sheaths. By setting the polyurethane sheath, the wear resistance and tear resistance of the optical cable are further improved, ensuring that the cable body will not be torn or excessively worn during the cable laying process.
[0033] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.
Claims
1. An optical cable for submarines, comprising an outer sheath (1), an inner sheath (2) and an optical unit, characterized in that, The outer sheath (1) is internally provided with an inner sheath (2), and a sheath layer (3) is arranged between the inner sheath (2) and the outer sheath (1), an inner wall of the inner sheath (2) is attached with an aramid reinforcing layer (4), an inner side of the aramid reinforcing layer (4) is provided with a main shielding layer (5), a main tensile reinforcing core (6) is arranged at an inner center of the main shielding layer (5), and the main tensile reinforcing core (6) is externally provided with a plurality of light units in annular array; Each light unit comprises an auxiliary tensile reinforcing core (7), a copper filling core (8), a first shielding layer (16) and a second shielding layer (11), two sides of the auxiliary tensile reinforcing core (7) are respectively abutted with the copper filling core (8), the copper filling core (8) is used for separating two groups of optical fiber wire pairs abutted on upper and lower sides of the auxiliary tensile reinforcing core (7), an inner side of each group of optical fiber wire pairs is provided with two optical fiber inner cores (9), an outer side of each optical fiber inner core (9) is provided with a nylon tight wrapping layer (10), and an outer side of each group of optical fiber wire pairs is provided with the second shielding layer (11).
2. An optical cable for a submarine vehicle according to claim 1, characterized in that, The main shielding layer (5), the first shielding layer (16) and the second shielding layer (11) are all woven by copper wires, the weaving density of the main shielding layer (5) is 70% to 90%, and the weaving density of the first shielding layer (16) and the second shielding layer (11) is 60% to 80%.
3. An optical cable for a submarine vehicle according to claim 1, characterized in that, The sheath layer (3) is woven by stainless steel wire, and the weaving density of the sheath layer (3) is 90% to 95%.
4. An optical cable for a submarine vehicle according to claim 1, characterized in that, An outer side of each second shielding layer (11) is wrapped with a first water-blocking tape (12).
5. An optical cable for a submarine use according to claim 1, characterized in that, The aramid reinforcing layer (4) is woven by aramid fiber, and an outer surface of the aramid reinforcing layer (4), the inner sheath (2) and the sheath layer (3) is respectively wrapped with a second water-blocking tape (13), a third water-blocking tape (14) and a fourth water-blocking tape (15).
6. An optical cable for a submarine vehicle according to claim 1, characterized in that, The outer sheath (1) and the inner sheath (2) are polyurethane sheaths.