High-temperature-resistant and weather-resistant intelligent photoelectric composite cable

Abstract

The utility model relates to power cable technical field, more particularly to high temperature resistant weather resistant intelligent photoelectric composite cable, include: the optical fiber unit in the center position, a plurality of electric power unit, the stranding in the optical fiber unit outside, the filling layer fills between electric power unit, and is bound by the binder layer and is bound to the cable core of circular section, the inner sheath layer extrusion package covers the outer wall of cable core, the outer sheath layer extrusion package covers the outer wall of inner sheath layer, the utility model discloses a optical fiber unit is arranged in the cable core center, and adopts the heat insulation pipe of foaming structure and is wrapped, effectively blocks the heat generated when electric power unit operation to the optical fiber transmission, ensures that the optical fiber still keeps low attenuation, high stable transmission performance under high temperature environment, through the steel band structure of spiral winding in the heat insulation pipe outside provides mechanical protection, has axial heat conduction capacity simultaneously, can diffuse the heat of local accumulation along cable longitudinal direction, avoids the formation of hot spot, promotes overall thermal stability.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, and more specifically to a high-temperature and weather-resistant intelligent optoelectronic composite cable. Background Technology

[0002] In complex outdoor environments such as oil and gas platforms, photovoltaic power stations, and field base stations, where remote power supply and data backhaul are required simultaneously, optical fiber composite cables are widely used because they integrate power transmission and optical fiber communication units. Their typical structure consists of insulated copper wires and optical fibers wrapped in loose tubes to form a cable, with an additional polymer sheath extruded on the outside.

[0003] Because fiber optic composite cables contain both fiber optic and power units, when the cable operates in high-temperature environments, the heat generated by the power conductors is directly conducted to the fiber optic units, leading to a decrease in fiber optic transmission performance and affecting communication quality. This heat-affected zone problem is particularly prominent under conditions of high-current power transmission or high ambient temperatures, limiting the reliability and service life of the cable in harsh environments. Utility Model Content

[0004] To address the technical problems existing in current optoelectronic composite cables, this utility model proposes a high-temperature and weather-resistant intelligent optoelectronic composite cable, comprising:

[0005] The fiber optic unit is located at the center.

[0006] Multiple power units are twisted together outside the optical fiber unit;

[0007] A filler layer is filled between the power units and the cable core, which is circular in cross-section, is wrapped and secured by a wrapping layer.

[0008] The inner sheath layer is extruded and covers the outer wall of the cable core;

[0009] The outer sheath layer is extruded and covered on the outer wall of the inner sheath layer;

[0010] The optical fiber unit includes at least one optical fiber, a heat insulation tube, and a heat-conducting layer. Multiple optical fibers are disposed inside the heat insulation tube, and the remaining space is filled with water-blocking paste. The heat-conducting layer includes a steel strip structure spirally wound on the outer wall of the heat insulation tube.

[0011] The winding pitch of the steel strip structure is greater than the width of the steel strip structure, so that gaps are formed between the winding steel strip structures.

[0012] Preferably, the width of the gap is less than or equal to the width of the steel strip structure.

[0013] Preferably, the width of the gap is 1 / 2 of the width of the steel strip structure.

[0014] Preferably, the thickness of the steel strip structure is 0.1 to 0.3 mm.

[0015] Preferably, the heat insulation pipe is constructed as a foamed structure, and the density of the inner and outer layers of the heat insulation pipe is higher than the density of the middle layer.

[0016] Preferably, the heat insulation pipe is a closed-cell foamed polyethylene pipe.

[0017] Preferably, the filling layer includes an inner filling layer and an outer filling layer, the inner filling layer includes a water-resistant filling rope, and the outer filling layer includes a flame-retardant PP strip.

[0018] Preferably, the flame-retardant PP strip is extruded to form a prefabricated cross-sectional shape, so that the flame-retardant PP strip has a surface that adheres to the power unit and the wrapping layer.

[0019] Preferably, the power unit includes a power core, which includes a conductor and an insulating layer extruded onto the outer wall of the conductor.

[0020] Preferably, the inner sheath layer is a flame-retardant polyolefin sheath layer, and the outer sheath layer is a weather-resistant black high-density polyethylene sheath layer.

[0021] Compared with existing technologies, the significant advantages of this novel high-temperature and weather-resistant intelligent optoelectronic composite cable are:

[0022] The high-temperature and weather-resistant intelligent optoelectronic composite cable proposed in this utility model places the optical fiber unit at the center of the cable core and wraps it with a foamed heat insulation tube, which effectively blocks the heat generated by the power unit during operation from being transferred to the optical fiber. This ensures that the optical fiber maintains low attenuation and high stability transmission performance even in high-temperature environments. The steel strip structure spirally wound around the heat insulation tube provides mechanical protection and has axial heat conduction capability, which can diffuse locally accumulated heat along the longitudinal direction of the cable, avoid the formation of hot spots, and improve the overall thermal stability. Attached Figure Description

[0023] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of the high-temperature and weather-resistant intelligent optoelectronic composite cable shown in this utility model.

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the high-temperature and weather-resistant intelligent optoelectronic composite cable shown in this utility model.

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the optical fiber unit shown in this utility model.

[0027] Figure 4 This is a schematic diagram of the steel strip structure shown in this utility model. Detailed Implementation

[0028] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0029] Combination Figures 1 to 2 As shown, this utility model proposes a high-temperature and weather-resistant intelligent optoelectronic composite cable, including an optical fiber unit 1, a power unit 2, a filling layer 3, an inner sheath layer 5, and an outer sheath layer 6.

[0030] Understandably, the power unit 2 includes a power core, which includes a conductor 21 and an insulation layer 22 extruded onto the outer wall of the conductor 21.

[0031] The conductor 21 is typically made of copper or aluminum alloy, which has good electrical conductivity and mechanical strength. The insulation layer 22 can be made of high-temperature resistant materials such as cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR) to ensure the safety and stability of power transmission.

[0032] Furthermore, the optical fiber unit 1 is located at the center of the cable core, and multiple power units 2 are twisted around the optical fiber unit 1. With this arrangement, when the cable is bent, the optical fiber unit 1 located in the center experiences the least bending stress and is less likely to break due to bending deformation. In addition, the heat from the multiple power units 2 can be diffused outwards.

[0033] The optical fiber unit 1 includes at least one optical fiber 11, a heat insulation tube 12, and a heat-conducting layer 13. Multiple optical fibers are disposed inside the heat insulation tube 12, and the remaining space is filled with water-blocking paste 14. The heat-conducting layer 13 includes a steel strip structure 131 spirally wound around the outer wall of the heat insulation tube 12.

[0034] Placing the optical fiber 11 inside the heat insulation tube 12 in this way minimizes the stress on the optical fiber when the cable is bent. At the same time, the surrounding power unit and the filling layer form a thermal buffer. The water-blocking paste 14 fills the excess space of the optical fiber, playing the roles of water blocking, lubrication and relieving micro-bending.

[0035] Furthermore, the winding pitch of the steel strip structure 131 is greater than the width of the steel strip structure 131, so that a gap 132 is formed between the wound steel strip structures 131.

[0036] Thus, by making the winding pitch of the steel strip structure 131 greater than the width of the strip, a gap 132 is formed. On the one hand, the high thermal conductivity of the steel strip can axially dissipate heat, achieving a uniform temperature of the cable body. On the other hand, the gap structure retains the flexibility of the cable, making it easy to lay and install.

[0037] Preferably, the width of the gap 132 is less than or equal to the width of the steel strip structure 131.

[0038] By ensuring that the width of the gap 132 is no greater than the width of the steel strip structure 131, uniform coverage and compressive strength can be guaranteed.

[0039] Preferably, the width of the gap 132 is half the width of the steel strip structure 131. This ensures the thermal conductivity of the steel strip structure 131 while also giving the spirally wound steel strip structure 131 good axial flexibility and radial compressive strength.

[0040] Optionally, the thickness of the steel strip structure is 0.1 to 0.3 mm.

[0041] The thickness of the steel strip structure 131 can be selected according to the diameter of the circumference it is located on. For example, when the diameter is 10 to 20 mm, the optical fiber unit can be selected with a 0.15 mm thick galvanized steel strip.

[0042] Preferably, the heat insulation pipe 12 is constructed as a foam structure, and the density of the inner layer 121 and the outer layer 123 of the heat insulation pipe 12 is higher than the density of the middle layer 122.

[0043] Thus, the inner layer 121 and outer layer 123 of the heat insulation tube 12 have a high density, which is beneficial to maintaining structural stability and surface strength. The middle layer 122 has a low density, forming an effective air insulation layer, which significantly reduces radial heat conduction. The closed-cell structure can also prevent moisture from penetrating and enhance the resistance to damp heat.

[0044] Preferably, the heat insulation pipe 12 is a closed-cell foamed polyethylene pipe.

[0045] Thus, by reserving deformation space in the heat insulation tube 12 and filling it with water-blocking paste, the heat insulation tube 12 adopts a "dense-sparse-dense" three-layer foaming structure, which enhances mechanical strength while ensuring the heat insulation effect, giving the cable the characteristics of long life and high adaptability.

[0046] Furthermore, the filling layer 3 fills the space between the power units 2 and is wrapped by the wrapping layer 4 to secure the cable core, which has a circular cross-section.

[0047] The filling layer 3 includes an inner filling layer 31 and an outer filling layer 32. The inner filling layer 31 includes a water-resistant filling rope, and the outer filling layer 32 includes a flame-retardant PP strip.

[0048] Thus, the inner filling layer 31 is a water-blocking filling rope that expands when exposed to water to effectively block the longitudinal migration of moisture, while the outer layer is a flame-retardant PP strip. Its prefabricated cross-sectional shape can fit tightly with the power unit and the wrapping layer, improving the roundness and structural stability of the cable core, while also giving the cable core flame-retardant properties.

[0049] Preferably, the flame-retardant PP strip is extruded to form a prefabricated cross-sectional shape, giving the flame-retardant PP strip a surface that adheres to the power unit 2 and the wrapping layer 4. This reduces the difficulty of filling and wrapping into a cable, and improves the roundness of the cable core and the structural stability.

[0050] Furthermore, the inner sheath layer 5 is extruded and covers the outer wall of the cable core, and the outer sheath layer 6 is extruded and covers the outer wall of the inner sheath layer 5. The inner sheath layer 5 is made of flame-retardant polyolefin material, which plays a primary protection and flame-retardant role. The outer sheath layer 6 is made of weather-resistant black high-density polyethylene (HDPE) or polyurethane (PU), which has good UV resistance, high and low temperature resistance, corrosion resistance and wear resistance, ensuring that the cable will not age or crack during long-term outdoor use.

[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A high-temperature and weather-resistant intelligent optoelectronic composite cable, characterized in that, include: The fiber optic unit (1) is located at the center. Multiple power units (2) are twisted together outside the optical fiber unit (1); A filling layer (3) is filled between the power units (2) and wrapped by a wrapping layer (4) to secure the cable core with a circular cross-section. The inner sheath layer (5) is extruded and covers the outer wall of the cable core; The outer sheath layer (6) is extruded and covers the outer wall of the inner sheath layer (5); The optical fiber unit (1) includes at least one optical fiber (11), a heat insulation tube (12) and a heat-conducting layer (13). Multiple optical fibers are disposed inside the heat insulation tube (12), and the remaining space is filled with water-blocking paste (14). The heat-conducting layer (13) includes a steel strip structure (131) spirally wound around the outer wall of the heat insulation tube (12). The winding pitch of the steel strip structure (131) is greater than the width of the steel strip structure (131), so that gaps (132) are formed between the winding steel strip structures (131).

2. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The width of the gap (132) is less than or equal to the width of the steel strip structure (131).

3. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The width of the gap (132) is half the width of the steel strip structure (131).

4. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The thickness of the steel strip structure (131) is 0.1 to 0.3 mm.

5. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The heat insulation tube (12) is constructed as a foam structure, and the density of the inner layer (121) and the outer layer (123) of the heat insulation tube (12) is higher than the density of the middle layer (122).

6. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The heat insulation pipe (12) is a closed-cell foamed polyethylene pipe.

7. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The filling layer (3) includes an inner filling layer (31) and an outer filling layer (32). The inner filling layer (31) includes a water-resistant filling rope, and the outer filling layer (32) includes a flame-retardant PP strip.

8. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 7, characterized in that, The flame-retardant PP strip is extruded to form a prefabricated cross-sectional shape, so that the flame-retardant PP strip has a surface that fits with the power unit (2) and the wrapping layer (4).

9. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The power unit (2) includes a power core, which includes a conductor (21) and an insulating layer (22) extruded onto the outer wall of the conductor (21).

10. The high-temperature and weather-resistant intelligent optoelectronic composite cable according to claim 1, characterized in that, The inner sheath layer (5) is a flame-retardant polyolefin sheath layer, and the outer sheath layer (6) is a weather-resistant black high-density polyethylene sheath layer.

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