Multi-mode armored optical cable with power transmission function

Abstract

The utility model discloses a multimode armored optical cable with power transmission, which comprises a cable core, the cable core comprises a reinforcing core, an optical fiber unit and a plurality of conductive units, the plurality of conductive units and the optical fiber unit are arranged outside the reinforcing core in a ring state, and the optical fiber unit is arranged outside the reinforcing core. A sheath layer, an inner protective layer, a water-blocking buffer layer, an armor layer and an outer protective layer are sequentially coated outside the cable core from inside to outside, and gaps between the plurality of conductive units and the optical fiber units in the sheath layer are filled with a filling layer. By adopting the armored optical cable provided by the utility model, on the premise of satisfying photoelectric transmission, multiple purposes of one cable are realized, the tensile property and the lateral pressure resistance of the optical cable are synchronously increased, so that the use requirements under complex underwater working environment conditions are satisfied, and the armored optical cable is strong in practicability, simple in overall structure, reasonable in design, capable of effectively reducing the cost and worthy of popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically a multimode armored optical cable with power transmission capability. Background Technology

[0002] Wires and cables are carriers of power transmission or information transmission, widely used in industrial and civil power facilities. Their requirements vary depending on the environment or occasion, especially in harsh environments such as underwater cryogenic conditions, which impose specific performance requirements on cable products. Optical cables are manufactured to meet optical, mechanical, or environmental performance specifications. They are communication cable assemblies that use one or more optical fibers encased in a protective sheath as the transmission medium and can be used individually or in groups. With the rapid development of the national network communication industry, multimedia such as voice, data, and images need to be transmitted, thus requiring different optical cables to meet the requirements. Existing multimode optical cables for short-distance transmission have the following main problems during installation: First, the installation of existing optical cables requires laying both the optical cable and the electrical cable to facilitate power transmission. The two products need to be laid and installed separately, resulting in a large amount of installation work. Therefore, it is necessary to develop a flame-retardant B1-grade underwater short-distance multimode armored optical cable for power transmission, achieving multi-purpose use with a single cable, avoiding problems such as numerous cables in the equipment, repeated wiring installation, and difficulties in maintenance due to numerous and messy cables. Secondly, optical cables are subject to factors such as lateral pressure and tension during use, which can affect their transmission performance.

[0003] A search revealed three patent documents: CN204536617U, which discloses an underwater dynamic micro-optical cable; CN218886241U, which discloses an underwater armored optical cable that is easy to deploy; and CN114937528B, which discloses a water-blocking, high-tensile-strength, and cold-resistant optical fiber monitoring power cable. These three patent documents offer different solutions to meet various usage requirements. With the development of projects in underwater resource exploration, underwater biological research, underwater environmental monitoring, offshore wind power, and wastewater treatment, the requirements for power cables widely used in underwater environments are becoming increasingly stringent. To enhance competitiveness, adapt to market demands, and increase market share, while also reducing unnecessary damage to optical cables during production, installation, and laying, this paper proposes an armored optical cable that differs from existing technologies to meet the requirements of use under special environmental conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the problems existing in the background art, thereby providing an armored optical cable with a simple structure and stable performance. Using this armored optical cable, the tensile strength and lateral pressure resistance of the optical cable can be increased to meet the requirements for use under special environmental conditions. Specifically, it is a multimode armored optical cable with power transmission.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a multimode armored optical cable with power transmission, comprising a cable core, the cable core comprising a reinforcing core, an optical fiber unit and a conductive unit, the conductive unit being provided in multiples, the multiple conductive units and optical fiber units being arranged in a ring outside the reinforcing core, the cable core being covered from the inside out with a sheath layer, an inner sheath layer, a water-blocking buffer layer, an armor layer and an outer sheath layer, and the gaps between the multiple conductive units and optical fiber units in the sheath layer being filled with a filling layer.

[0006] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, there are four conductive units, each including a conductor and an insulating layer extruded onto the conductor. There is one optical fiber unit, which includes a multimode optical fiber and a loose tube sleeved outside the multimode optical fiber, with a sleeve filling layer filling the loose tube. The reinforcing core is a steel wire rope made of multiple steel wires. The four conductive units and one optical fiber unit are arranged in a loop outside the reinforcing core.

[0007] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, the conductor is made of tin-plated copper conductor of Class 5 in GB / T 3956-2008, the insulation layer is made of polytetrafluoroethylene material extruded, and the sleeve filling layer is made of aramid fiber filling.

[0008] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, the filling layer is made of water-blocking yarn filler.

[0009] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, the sheath layer is made of corrugated aluminum alloy.

[0010] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, both the inner and outer sheaths are extruded from halogen-free, low-smoke, flame-retardant B1-grade polyolefin material.

[0011] Furthermore, in the multimode armored optical cable with power transmission described in this utility model, the water-blocking buffer layer is formed by double-layer overlapping wrapping of water-blocking tape, and the wrapping overlap rate is not less than 30%.

[0012] Furthermore, the multimode armored optical cable with power transmission described in this utility model is used, wherein the armor layer is made of plastic steel tape wrapped around it.

[0013] The multimode armored optical cable for power transmission described in this invention features a reinforcing core within the cable core, surrounded by a sheath layer, an inner sheath layer, a water-blocking buffer layer, an armor layer, and an outer sheath layer, arranged sequentially from the inside out. A filler layer is also placed in the gaps within the cable core. This structure, while ensuring compliance with B1-grade fire resistance and flame retardancy, also enhances the cable's tensile strength and resistance to lateral pressure and stress through the added armor layer and reinforcing core. Therefore, the armored optical cable of this invention achieves multiple uses in a single cable while meeting the requirements for underwater photoelectric transmission. It simultaneously increases the cable's tensile and lateral pressure resistance, meeting the demands of complex underwater working environments. It is highly practical, has a simple and reasonable overall structure, effectively reduces costs, and is worthy of widespread adoption. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] The figure shows: 1-reinforcing core, 2-fiber unit, 21-multimode fiber, 22-loose tube, 23-tube filling layer, 3-conductive unit, 31-conductor, 32-insulation layer, 4-filling layer, 5-sheath layer, 6-inner sheath, 7-water-blocking buffer layer, 8-armor layer, 9-outer sheath. Detailed Implementation

[0017] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0018] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," and "right" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "provided with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] It should be noted that the term "comprising" or any other variation is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] like Figure 1 As shown, this embodiment provides a multimode armored optical cable with power transmission capabilities, including a cable core. The cable core includes a reinforcing core 1, an optical fiber unit 2, and a conductive unit 3. There are four conductive units 3 and one optical fiber unit 2. The four conductive units 3 and one optical fiber unit 2 are arranged in a ring around the outside of the reinforcing core 1. From the inside out, the cable core is sequentially covered with a sheath layer 5, an inner sheath layer 6, a water-blocking buffer layer 7, an armor layer 8, and an outer sheath layer 9. A filling layer 4 fills the gaps between the multiple conductive units 3 and the optical fiber unit 2 within the sheath layer 5. The conductive unit 3 includes a conductor 31 and an insulating layer 32 extruded onto the conductor 31. The optical fiber unit 2 includes a multimode optical fiber 21 and a loose tube 22 sleeved outside the multimode optical fiber 21. A sleeve filling layer 23 fills the loose tube 22. The reinforcing core 1 is a steel wire rope formed by multiple steel wires hinged together.

[0022] In the specific manufacturing process, the armored optical cable provided in this embodiment is used. The conductor 31 is made of tin-plated copper conductor of Class 5 in GB / T3956-2008, and the insulation layer 32 is made of polytetrafluoroethylene material extrusion. The sleeve filling layer 23 is made of aramid filler, the filling layer 4 is made of water-blocking yarn filler, the sheath layer 5 is made of corrugated aluminum sheath made of aluminum alloy, the inner sheath 6 and the outer sheath 9 are both made of halogen-free low-smoke flame-retardant B1 grade polyolefin material extrusion, the water-blocking buffer layer 7 is made of water-blocking tape double-layer overlapping wrapping, and the wrapping overlap rate is not less than 30%. The armor layer 8 is made of plastic steel tape wrapping.

[0023] The multimode armored optical cable with power transmission described in this utility model features a conductive unit 3 and an optical fiber unit 2 arranged in a ring around the outside of the reinforcing core 1. The reinforcing core 1 is a steel wire rope made of multiple steel wires hinged together. The reinforcing core 1 improves the radial tensile strength of the core and enhances the bending resistance of the optical cable. The conductor 31 is made of tin-plated copper conductor of Class 5 in GB / T3956-2008. Under normal temperature conditions, tin is very stable in air because a dense oxide film forms on the surface of tin, preventing further oxidation. Tin plating on the copper surface can improve the oxidation resistance of copper to a certain extent. An insulation layer 32, made of extruded polytetrafluoroethylene (PTFE), is provided on conductor 31. PTFE has excellent dielectric strength and insulation resistance, exhibits high stability, is almost unaffected by temperature changes, and possesses excellent weather resistance and mechanical strength. PTFE also has exceptional thermal stability, allowing fluoroplastic cables to withstand high-temperature environments of 150-200 degrees Celsius, while common polyethylene and polyvinyl chloride (PVC) cables are only suitable for operating environments of 70-90 degrees Celsius. Furthermore, under the same conductor cross-section conditions, cables using PTFE extrusion can transmit a larger allowable current, significantly expanding the cable's application range.

[0024] The multimode fiber 21 in the optical fiber unit 2 primarily transmits optical signals. The core of the fiber is a very pure glass or plastic fiber; through internal reflection, the optical signal can be transmitted along the fiber. Compared to traditional electrical signal transmission methods, optical fiber transmission offers higher speed and greater bandwidth, meeting the demands of modern communication for high-speed, high-capacity transmission. The loose tube 22 is filled with a tube filling layer 23, which is made of aramid fiber. Using aramid not only improves the roundness of the core but also increases its tensile strength.

[0025] The sheath layer 5 is made of corrugated aluminum alloy, and a filling layer 4 is filled in the gap between the multiple conductive units 3 and optical fiber units 2 in the sheath layer 5. The filling layer 4 is filled with water-blocking yarn. Filling with water-blocking yarn during the cabling process can not only improve the roundness of the wire core, but also improve the stability of the wire core. At the same time, using water-blocking yarn as a filler can also improve the tensile strength and water-blocking performance of the wire core.

[0026] Both the inner sheath 6 and the outer sheath 9 are extruded from halogen-free, low-smoke, flame-retardant B1-grade polyolefin material. Halogen-free, low-smoke, flame-retardant B1-grade polyolefin material is currently the mainstream material used in cable materials, possessing good flame retardancy and being a commonly used flame-retardant material in existing cables; it can be purchased directly from the market. As a new type of flame-retardant cable, B1-grade flame-retardant cables not only require assessment of the charring height during bundle combustion but also of the cable's heat release and smoke production characteristics. Therefore, to meet the combustion characteristic requirements of B1-grade flame-retardant cables (closer to actual fire conditions), the requirements for cable material selection, structure, and manufacturing processes are more stringent. High-quality materials, a reasonable process structure, and rigorous process parameters must be selected. Thus, B1-grade flame-retardant cables have higher requirements for their combustion characteristics, requiring this series of cables to be halogen-free, low-smoke, and environmentally friendly cables, and specifying requirements for smoke toxicity. This is highly beneficial for rescue work in fire situations, effectively reducing casualties and property damage.

[0027] Between the inner sheath 6 and the outer sheath 9, a water-blocking buffer layer 7 and an armor layer 8 are provided. The water-blocking buffer layer 7 is made of double-layered, overlapping water-blocking tape. Because the water-blocking tape has excellent flame-retardant and heat-absorbing properties, as well as being particularly wear-resistant, waterproof, and weather-resistant, the added water-blocking buffer layer 7 prevents short circuits or other problems caused by moisture in the optical cable. Outside the water-blocking buffer layer 7, an armor layer 8 is provided, which is made of plastic-coated steel tape. Plastic-coated steel tape is a material used to protect optical cables and can be used for the laying and maintenance of optical cables. The main function of the plastic-coated steel tape is to protect the optical cable, prevent damage during laying, and increase the cable's strength and durability.

[0028] Therefore, the armored optical cable of this utility model has a reinforcing core 1 inside the cable core, and is covered from the inside to the outside of the cable core with a sheath layer 5, an inner sheath layer 6, a water-blocking buffer layer 7, an armor layer 8, and an outer sheath layer 9, and the gaps inside the cable core are filled with a filling layer 4. By adopting the above structure, while ensuring compliance with the fire resistance and flame retardancy of B1 grade cables, the added armor layer 8 and reinforcing core 1 can resist the influence of factors such as lateral pressure and tension, thereby increasing the tensile strength and lateral pressure resistance of the optical cable.

[0029] In summary, the armored optical cable described in this utility model achieves multiple uses with a single cable while meeting the requirements of photoelectric transmission. It also increases the cable's tensile and lateral pressure resistance, thus meeting the usage requirements under complex underwater working environments. It is highly practical, has a simple overall structure, and a reasonable design, which can effectively reduce costs and is worthy of widespread use.

[0030] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0031] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. The above description is only a preferred embodiment of this utility model and does not limit this utility model. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of this utility model should be included within the scope of protection of the technical solutions of this utility model.

Claims

1. A multimode armored optical cable with power transmission capability, comprising a cable core, wherein the cable core includes a reinforcing core (1), an optical fiber unit (2), and a conductive unit (3), characterized in that: The conductive unit (3) is provided with multiple units. The multiple conductive units (3) and optical fiber units (2) are arranged in a ring on the outside of the reinforcing core (1). The cable core is covered from the inside to the outside with a sheath layer (5), an inner sheath layer (6), a water-blocking buffer layer (7), an armor layer (8), and an outer sheath layer (9). The gap between the multiple conductive units (3) and optical fiber units (2) in the sheath layer (5) is filled with a filling layer (4).

2. The multimode armored optical cable with power transmission capability according to claim 1, characterized in that: The conductive unit (3) has four members. The conductive unit (3) includes a conductor (31) and an insulating layer (32) extruded on the conductor (31). The optical fiber unit (2) has one member. The optical fiber unit (2) includes a multimode optical fiber (21) and a loose tube (22) sleeved on the outside of the multimode optical fiber (21). The loose tube (22) is filled with a sleeve filling layer (23). The reinforcing core (1) is a steel wire rope made of multiple steel wires. The four conductive units (3) and the one optical fiber unit (2) are arranged in a ring on the outside of the reinforcing core (1).

3. A multimode armored optical cable with power transmission capability according to claim 2, characterized in that: The conductor (31) is made of tin-plated copper conductor of type 5 in GB / T 3956-2008, the insulating layer (32) is made of polytetrafluoroethylene material extruded, and the sleeve filling layer (23) is made of aramid fiber filling.

4. A multimode armored optical cable with power transmission capability according to claim 1, characterized in that: The filling layer (4) is made of water-resistant yarn filler.

5. A multimode armored optical cable with power transmission capability according to claim 1, characterized in that: The sheath layer (5) is made of aluminum alloy with a wrinkled aluminum sheath.

6. A multimode armored optical cable with power transmission capability according to claim 1, characterized in that: Both the inner protective layer (6) and the outer protective layer (9) are extruded from halogen-free, low-smoke, flame-retardant B1 grade polyolefin material.

7. A multimode armored optical cable with power transmission capability according to claim 1, characterized in that: The water-blocking buffer layer (7) is made by wrapping two layers of water-blocking tape, and the wrapping overlap rate is not less than 30%.

8. A multimode armored optical cable with power transmission capability according to claim 1, characterized in that: The armor layer (8) is made of plastic steel strip wrapped around it.

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