Polyurethane watertight photoelectric composite cable

Abstract

The utility model discloses a polyurethane watertight photoelectric composite cable, and relates to the technical field of watertight photoelectric composite cables. The composite cable comprises the outer sheath, the inner sheath, the optical fiber unit and the power line, the inner sheath is arranged in the outer sheath, the overall use strength of the composite cable is improved through the outer sheath and the inner sheath, and the armor layer is arranged between the outer sheath and the inner sheath, so that even if the outer sheath is broken, the optical fiber unit can be prevented from being damaged, and the service life of the composite cable is prolonged. The inner sheath is protected through the armor layer, the first water-blocking tape is made of a material formed by compounding polyester fibers and a high-water-absorption material after meeting water, and when water enters a cable port using the water-blocking tape, high-water-absorption powder or a water-swelling material contained in the water-blocking tape can absorb the water through the water absorption performance of the high-water-absorption powder or the water-swelling material. And the water-blocking tape expands to become gel to form a protective barrier for preventing water from flowing, namely, the protective barrier performs waterproof protection between the broken part of the outer sheath and the armor layer.

Description

Technical Field

[0001] This utility model belongs to the field of watertight optical-electric composite cables, specifically, it relates to a polyurethane watertight optical-electric composite cable. Background Technology

[0002] Optical-optical composite cables are suitable for use as transmission lines in broadband access network systems. They are a new type of access method that integrates optical fiber and copper power transmission wires, and can solve problems related to broadband access, equipment power supply, and signal transmission.

[0003] The existing patent application number 201920402643.7 discloses a lightweight underwater optical-electric composite cable, including a reinforcing member disposed at the center of the optical-electric composite cable and an optical unit and an electrical unit disposed around the outside of the reinforcing member. The optical unit and the electrical unit are provided with a water-blocking tape layer, an inner sheath, a water-blocking reinforcing layer and an outer sheath on their outer sides. The gap between the optical unit and the electrical unit is filled with water-blocking paste.

[0004] However, the outer side of the optical unit in this patent is equipped with a thick-walled PBT loose tube. When the outer sheath of the cable is damaged or even the internal structure of the cable is damaged, water will directly act on the loose tube unit of the composite cable and will penetrate longitudinally along the gap between the optical unit and the loose tube, eventually causing seawater to fill the entire equipment, resulting in water ingress and damage to the operating equipment. In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a polyurethane watertight optical-electric composite cable.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A polyurethane watertight optical-electric composite cable includes an outer sheath, an inner sheath, an optical fiber unit, and power lines. The outer sheath is provided with an inner sheath inside, and the inner sheath is provided with an inner core inside. The inner core includes an optical fiber unit and multiple power lines. A main shielding layer and an auxiliary shielding layer are provided between the inner core and the inner sheath. The main shielding layer is composed of multiple first shielding wires, and the auxiliary shielding layer is composed of multiple second shielding wires.

[0008] An armor layer is provided between the outer sheath and the inner sheath, and a first water-blocking strip is provided on both the inner and outer surfaces of the armor layer.

[0009] Optionally, the multiple power lines and optical fiber units are arranged in a ring array outside the main reinforcing core. A first polyester film is provided outside the multiple power lines and optical fiber units. A second water-blocking tape is wrapped around the outside of the polyester film. A first shielding layer is provided outside the second water-blocking tape. Multiple auxiliary reinforcing cores with circular inner cores are provided inside the first shielding layer.

[0010] Optionally, the outer surface of the first shielding layer contacts multiple second shielding wires, the outer surface of the multiple second shielding wires is provided with a second polyester film, and the outer surface of the second polyester film is wrapped with a third water-blocking tape, and the outer surface of the third water-blocking tape is provided with a second shielding layer for separating the second shielding wires and the first shielding wires.

[0011] Optionally, the outer sides of multiple second shielding wires abut against the inner side of the same third water-blocking strip, a third shielding layer is provided outside the third water-blocking strip, and a fourth water-blocking strip is wrapped around the surface of the third shielding layer. An aramid inner sheath is provided between the fourth water-blocking strip and the inner sheath.

[0012] Optionally, the first shielding layer, the second shielding layer, and the third shielding layer are all braided with multiple tin-plated copper wires, and the inner and outer surfaces of the first shielding layer, the second shielding layer, and the third shielding layer are all covered with an aluminum film protective layer. The braiding density of the first shielding layer, the second shielding layer, and the third shielding layer is 60% to 80%.

[0013] Optionally, the outer sheath is provided with multiple C-shaped sleeves at equal intervals on its outer surface. Each C-shaped sleeve has a limit bolt and a nut threadedly connected to its open end. Each C-shaped sleeve is provided with a snap-fit ​​block at equal intervals on its outer surface. Each snap-fit ​​block has an anti-bite protrusion snapped inside it.

[0014] 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:

[0015] 1. This utility model improves the overall strength of the composite cable through the outer and inner sheaths. Furthermore, an armor layer is provided between the outer and inner sheaths, further enhancing the cable's tensile strength. Therefore, even if the outer sheath breaks, the inner sheath will be protected by the armor layer. When exposed to water, the first water-blocking strip, made of polyester fiber and highly absorbent material, absorbs water when it enters the cable port. The highly absorbent powder or water-swellable material contained in the water-blocking strip absorbs the water and rapidly expands many times over, becoming a gel that forms a "wall" to prevent water flow and provide protection. In other words, the barrier provides waterproof protection for the broken outer sheath and the area between the armor layers.

[0016] 2. Considering that the device is a composite optical cable, the inner core is equipped with an optical fiber unit for network connection and a power cord for power supply. Therefore, the inner core needs to be further waterproofed and tensile-resistant. For this reason, the inner core of the cable adopts a main reinforcing core and an auxiliary reinforcing core to improve the strength of the inner core. In addition, a second water-blocking strip is set to further waterproof the inner core. Secondly, the third water-blocking strip plays a waterproof role between the first shielding wire and the inner core. The fourth water-blocking strip plays a waterproof role between the inner sheath and the second shielding wire.

[0017] 3. Considering that the device is used underwater, it is inevitably subject to being bitten and scratched by marine life when deployed on the seabed. In order to prevent water from entering the device due to the outer sheath being broken by marine life biting and scratching, multiple C-shaped sleeves are designed. The anti-bite protrusions on the outside of the multiple C-shaped sleeves will resist the biting and scratching of marine life, thereby preventing water from entering the device after the outer sheath is broken due to the above-mentioned situations.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] 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.

[0020] In the picture:

[0021] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the external structure of the C-type sleeve in this utility model;

[0023] Figure 3 This is a schematic diagram of the combined component structure of the snap-fit ​​block and the anti-bite protrusion in this utility model;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of part A in the diagram;

[0025] Figure 5 for Figure 1 Schematic diagram of part B in the diagram;

[0026] Figure 6 for Figure 1 A schematic diagram of the structure of part C in the diagram.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Outer sheath; 2. Inner sheath; 3. Fiber optic unit; 4. Power cord; 5. First shielded wire; 6. Second shielded wire; 7. Armor layer; 8. First water-blocking tape; 9. First polyester film; 10. Second water-blocking tape; 11. First shielding layer; 12. Main reinforcing core; 13. Auxiliary reinforcing core; 14. Second polyester film; 15. Third water-blocking tape; 16. Second shielding layer; 17. Anti-bite protrusion; 18. Third shielding layer; 19. Fourth water-blocking tape; 20. Aramid inner sheath; 21. C-type sleeve; 22. Limiting bolt; 23. Clip block.

[0029] 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

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Please see Figures 1 to 6 This utility model provides a technical solution: a polyurethane watertight optical-electric composite cable, including an outer sheath 1, an inner sheath 2, an optical fiber unit 3, and a power line 4. The inner sheath 2 is provided inside the outer sheath 1, and an inner core is provided inside the inner sheath 2. The inner core includes an optical fiber unit 3 and multiple power lines 4. A main shielding layer and an auxiliary shielding layer are provided between the inner core and the inner sheath 2. The main shielding layer is composed of multiple first shielding wires 5, and the auxiliary shielding layer is composed of multiple second shielding wires 6.

[0032] An armor layer 7 is provided between the outer sheath 1 and the inner sheath 2. A first water-blocking strip 8 is provided on both the inner and outer surfaces of the armor layer 7. Considering the drawbacks of existing cables where water directly affects the loose tube unit when the outer sheath is damaged or even the internal structure is compromised, water will penetrate longitudinally along the gap between the optical unit and the loose tube, eventually filling the entire equipment with seawater and causing damage. This invention improves the overall strength of the composite cable through the outer sheath 1 and inner sheath 2, and the armor layer 7 between the outer sheath 1 and inner sheath 2 enhances the cable's tensile strength. The performance is further improved, so even if the outer sheath 1 is broken, the inner sheath 2 will be protected by the armor layer 7. When it comes into contact with water, the first water-blocking strip 8 will use itself to be made of polyester fiber and super absorbent material. When water enters the cable port where the water-blocking strip is used, the super absorbent powder (or water-swellable material) contained in the water-blocking strip can absorb the water by its water absorption properties. The water-blocking strip will expand many times over and become a gel, thus forming a "wall" to prevent the flow of water and play a protective role. That is, the barrier will waterproof the broken part of the outer sheath 1 and the area between the armor layer 7.

[0033] Multiple power lines 4 and optical fiber units 3 are arranged in a ring array outside the main reinforcing core 12. A first polyester film 9 is provided outside the multiple power lines 4 and optical fiber units 3. A second water-blocking tape 10 is wrapped around the polyester film. A first shielding layer 11 is provided outside the second water-blocking tape 10. Multiple auxiliary reinforcing cores 13 with circular inner cores are provided inside the first shielding layer 11. Considering that the device is a composite optical cable, the inner core is equipped with optical fiber units 3 for network connection and power lines 4 for power supply. Therefore, the inner core needs to be further waterproofed and tensile-resistant. For this reason, the inner core of the cable adopts the main reinforcing core 12 and auxiliary reinforcing cores 13 to improve the strength of the inner core. The second water-blocking tape 10 is also provided to provide further waterproof protection for the inner core.

[0034] The outer surface of the first shielding layer 11 contacts multiple second shielding wires 6. A second polyester film 14 is provided on the outside of the multiple second shielding wires 6, and a third water-blocking tape 15 is wrapped around the outside of the second polyester film 14. A second shielding layer 16 is provided on the outside of the third water-blocking tape 15 to separate the second shielding wires 6 and the first shielding wires 5. By setting the first shielding layer 11 and the second shielding layer 16, interference is prevented between the inner core and the first shielding wires 5 and the second shielding wires 6, thereby ensuring that the signal transmission of the first shielding wires 5 and the second shielding wires 6 is not interfered with.

[0035] Among them, the outer sides of multiple second shielding wires 6 abut against the inner side of the same third water-blocking strip 15. A third shielding layer 18 is provided outside the third water-blocking strip 15, and a fourth water-blocking strip 19 is wrapped around the surface of the third shielding layer 18. An aramid inner sheath 20 is provided between the fourth water-blocking strip 19 and the inner sheath 2. By setting the third water-blocking strip 15, the first shielding wire 5 and the inner core are waterproofed, and the fourth water-blocking strip 19 is waterproofed between the inner sheath 2 and the second shielding wire 6.

[0036] The first shielding layer 11, the second shielding layer 16, and the third shielding layer 18 are all braided with multiple tin-plated copper wires, and aluminum film protective layers are attached to the inner and outer surfaces of the first shielding layer 11, the second shielding layer 16, and the third shielding layer 18. The braiding density of the first shielding layer 11, the second shielding layer 16, and the third shielding layer 18 is 60% to 80%. By attaching aluminum film protective layers to the inner and outer surfaces of the first shielding layer 11, the second shielding layer 16, and the third shielding layer 18, the anti-interference capability of the device is further improved, and the multi-layer anti-shielding structure ensures that the first cable, the second cable, and the inner core will not interfere with each other.

[0037] The outer sheath 1 is fitted with multiple C-shaped sleeves 21 at equal intervals. Each C-shaped sleeve 21 has a threaded limit bolt 22 and a nut at its open end. Each C-shaped sleeve 21 is also fitted with snap-fit ​​blocks 23 at equal intervals. Each snap-fit ​​block 23 has an anti-bite protrusion 17 inside. Considering that the device is used underwater, it is inevitably subject to being bitten and scratched by marine life when deployed on the seabed. In order to prevent the outer sheath 1 from breaking due to being bitten and scratched by marine life and causing water to enter the device, multiple C-shaped sleeves 21 are designed. The anti-bite protrusions 17 on the outside of the multiple C-shaped sleeves 21 will resist being bitten and scratched by marine life, thereby preventing the outer sheath 1 from breaking due to the above-mentioned situations and causing water to enter the device.

[0038] 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. A polyurethane watertight photoelectric composite cable comprising an outer sheath (1), an inner sheath (2), an optical fiber unit (3), and a power line (4), characterized in that, The inner part of the outer sheath (1) is provided with an inner sheath (2), and the inner part of the inner sheath (2) is provided with an inner core, which comprises an optical fiber unit (3) and a plurality of power lines (4), and the inner core is provided with a main shielding line placement layer and an auxiliary shielding line placement layer between the inner core and the inner sheath (2), the main shielding line placement layer is composed of a plurality of first shielding lines (5), and the auxiliary shielding line placement layer is composed of a plurality of second shielding lines (6); The outer sheath (1) and the inner sheath (2) are provided with an armor layer (7), and the inner surface and the outer surface of the armor layer (7) are provided with a first water-blocking tape (8).

2. The polyurethane water-blocked optical fiber cable according to claim 1, wherein, The plurality of power lines (4) and the optical fiber unit (3) are arranged in a ring array outside the main reinforcing core (12), a first polyester film (9) is arranged outside the plurality of power lines (4) and the optical fiber unit (3), a second water-blocking tape (10) is wrapped outside the polyester film, and a first shielding layer (11) is arranged outside the second water-blocking tape (10), and the inner side of the first shielding layer (11) is provided with a plurality of auxiliary reinforcing cores (13) of the whole circle inner core.

3. The polyurethane water-blocked optical fiber cable according to claim 2, wherein, The outer surface of the first shielding layer (11) is in contact with the plurality of second shielding lines (6), the outer part of the plurality of second shielding lines (6) is provided with a second polyester film (14), and the outer part of the second polyester film (14) is wrapped with a third water-blocking tape (15), and the outer part of the third water-blocking tape (15) is provided with a second shielding layer (16) for separating the second shielding lines (6) and the first shielding lines (5).

4. The polyurethane water-blocked optical fiber cable according to claim 3, wherein, The outer side of the plurality of second shielding lines (6) is in contact with the inner side of the same third water-blocking tape (15), the outer part of the third water-blocking tape (15) is provided with a third shielding layer (18), and the surface of the third shielding layer (18) is wrapped with a fourth water-blocking tape (19), and the fourth water-blocking tape (19) is provided with a aramid inner protective layer (20) between the inner sheath (2).

5. The polyurethane water-blocked optical fiber cable composite of claim 3, wherein, The first shielding layer (11), the second shielding layer (16) and the third shielding layer (18) are all woven by a plurality of tinned copper wires, and the inner and outer surfaces of the first shielding layer (11), the second shielding layer (16) and the third shielding layer (18) are all attached with an aluminum film protective layer, and the weaving density of the first shielding layer (11), the second shielding layer (16) and the third shielding layer (18) is 60%-80%.

6. The polyurethane water-blocked optical fiber cable composite of claim 1, wherein, The outer part of the outer sheath (1) is provided with a plurality of C-shaped sleeves (21) at equal intervals, the opening end of each C-shaped sleeve (21) is threadedly connected with a limiting bolt (22) and a nut, and the outer part of each C-shaped sleeve (21) is provided with a clamping block (23) at equal intervals, and each clamping block (23) is clamped with an anti-biting protruding piece (17) inside.

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