CN219575215U - Suspended polypropylene insulation optical fiber composite cable - Google Patents

Abstract

The utility model belongs to the technical field of cables, and discloses a suspended polypropylene insulation optical fiber composite cable. The suspended polypropylene insulation optical fiber composite cable comprises an optical fiber temperature measuring unit and a reinforcing layer which are sequentially arranged from inside to outside, wherein a plurality of load units and a plurality of combined hoisting units are arranged between the optical fiber temperature measuring unit and the reinforcing layer; the reinforcing layer comprises a wrapping cloth layer and an outer sheath which are sequentially arranged from inside to outside; the plurality of load units and the plurality of combined hoisting units are alternately arranged around the periphery of the optical fiber temperature measuring unit in a surrounding mode, and the reinforcing layer wraps the plurality of load units and the plurality of combined hoisting units together. The suspended polypropylene insulated optical fiber composite cable has the advantages of simple and convenient manufacturing process, low cost, low layout difficulty during construction, convenient maintenance and replacement, and capability of monitoring the load level and the temperature inside the cable in real time, and improves the safety during the use of the suspended polypropylene insulated optical fiber composite cable.

Description

Suspended polypropylene insulation optical fiber composite cable

Technical Field

The utility model relates to the technical field of cables, in particular to a suspended polypropylene insulation optical fiber composite cable.

Background

The suspended crosslinked polyethylene insulated power cable is a power cable with a special structure, is provided with three fan-shaped combined hoisting steel wires, and is different from the traditional armored power cable, the power cable can bear larger tensile force and has even stress on a cable body. The suspended crosslinked polyethylene insulated power cable is commonly used for mine lifting, blast furnace hoisting, large casting, petroleum drilling, large hoisting, busy hoisting, cableways, ground cable cars, ships, offshore facilities and the like.

The production, manufacture and layout of the suspended crosslinked polyethylene insulated power cable have the following problems: 1. the three single-core cables are required to be produced independently, and then the single-core cables and the fan-shaped combined hoisting steel wires are assembled, so that the production period is longer, and in addition, the cable structure is required to be specially designed according to practical application occasions, so that the product specificity is higher, and the manufacturing cost is high; 2. after the assembly is finished, the outer parts are bound together through high-strength strapping tapes, so that the requirement on construction standardization is high, the problem of cable stranding caused by improper construction is easy to occur in construction, and the cable is difficult to lay again due to limited space of mine cables; 3. with the development of intelligent power grid technology, the running state of the cable needs to be monitored in real time, so that the cable fault is prejudged in advance, the problem of early discovery and early solution is solved, the electricity utilization safety of application scenes such as mining areas is effectively ensured, and the life and property safety is ensured not to be damaged due to the electric fault.

Accordingly, there is a need to improve the prior art to provide a novel power cable to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide the suspended polypropylene insulated optical fiber composite cable which is simple and convenient in manufacturing process, low in cost, low in layout difficulty during construction and convenient to maintain and replace, can monitor the load level and the temperature in the cable in real time, and improves the safety when the suspended polypropylene insulated optical fiber composite cable is used.

To achieve the purpose, the utility model adopts the following technical scheme:

the suspended polypropylene insulation optical fiber composite cable comprises an optical fiber temperature measuring unit and a reinforcing layer which are sequentially arranged from inside to outside, wherein a plurality of load units and a plurality of combined hoisting units are arranged between the optical fiber temperature measuring unit and the reinforcing layer; wherein: the reinforcing layer comprises a wrapping cloth layer and an outer sheath which are sequentially arranged from inside to outside; the load units and the combined hoisting units are alternately arranged around the circumference of the optical fiber temperature measuring unit, and the reinforcing layer wraps the load units and the combined hoisting units together.

Optionally, the optical fiber temperature measuring unit comprises a temperature measuring optical fiber, a metal tube and an optical fiber sheath which are sequentially arranged from inside to outside, and a gap between the inside of the metal tube and the temperature measuring optical fiber is filled with filling paste.

Optionally, the load unit includes a conductive core, a semiconductive shielding layer, an insulating layer, a semiconductive insulating shielding layer, a metal shielding layer and a protective layer, which are sequentially arranged from inside to outside, wherein the semiconductive shielding layer and the semiconductive insulating shielding layer are extruded thermoplastic polypropylene-based semiconductive shielding pieces, and the insulating layer is extruded thermoplastic polypropylene insulating pieces.

Optionally, the semiconductive shield, the insulating layer, and the semiconductive insulating shield are integrally formed.

Optionally, the nominal thickness of the semiconductive shielding layer and the semiconductive insulating shielding layer is 1mm, the average thickness ranges from 0.9mm to 1.1mm, and the thickness of the thinnest point is not less than 0.5mm; the insulating layer has a nominal thickness of 10.5mm, an average thickness in the range of 10mm to 11mm, and a thinnest point thickness of not less than 9.35mm.

Optionally, the nominal cross-sectional area of the conductive core is in the range of 16mm ² To 630mm ² 。

Optionally, the metal shielding layer is a copper strip overlapped wrapping layer or a copper wire sparse wrapping layer.

Optionally, the combined hoisting unit comprises a hoisting wire core and a filling piece which are sequentially arranged from inside to outside, and the filling piece is a nonmetal flexible piece.

Optionally, the shore hardness of the filling piece is 60A to 70A.

Optionally, the wrapping cloth belt layer is overlapped and wrapped with multiple layers.

The beneficial effects are that:

the hanging type polypropylene insulation optical fiber composite cable in the embodiment directly wraps the plurality of load units and the combined hoisting units through the reinforcing layer, replaces the scheme of directly using high-strength strapping tapes to be bound together in the prior art, and can ensure the roundness of the cable structure through the extrusion wrapping effect of the wrapping tape layer and the outer sheath; meanwhile, after the suspended polypropylene insulation optical fiber composite cable fails or reaches the life cycle, the cable cannot be damaged during replacement, the replacement is more convenient, the fault removal time is greatly shortened, and the orderly performance of normal production activities is ensured. The suspended polypropylene insulation optical fiber composite cable in the embodiment further comprises an optical fiber temperature measuring unit, wherein the optical fiber temperature measuring unit is positioned at the center of the suspended polypropylene insulation optical fiber composite cable, can monitor the running condition of the peripheral load unit in real time, is beneficial to dynamic optimization of cable load, and enables the line utilization to reach an optimal value; and when the suspended polypropylene insulated optical fiber composite cable is in overload operation, the power grid dispatching can timely acquire that the suspended polypropylene insulated optical fiber composite cable is in abnormal operation state by transferring load or cutting off the line, so that the cable line is prevented from generating fire due to overheat, and the safe and reliable operation of the cable is ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of a suspended polypropylene insulated fiber optic composite cable according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an optical fiber temperature measurement unit according to an embodiment of the present utility model;

fig. 3 is a schematic cross-sectional view of a load cell provided in an embodiment of the present utility model.

In the figure:

10. an optical fiber temperature measuring unit; 11. a temperature measuring optical fiber; 12. filling paste; 13. a metal tube; 14. an optical fiber sheath;

20. a load unit; 21. a conductive core; 22. a semiconductive shield layer; 23. an insulating layer; 24. a semiconductive insulating shield layer; 25. a metal shielding layer; 26. a protective layer;

30. a combined hoisting unit; 31. hoisting a wire core; 32. a filler;

40. a reinforcing layer; 41. wrapping the tape layer; 42. an outer sheath.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The suspended polypropylene insulation optical fiber composite cable in the embodiment has the advantages of simple and convenient manufacturing process, low cost, low layout difficulty during construction and convenient maintenance and replacement, and can monitor the load level and the temperature inside the suspended polypropylene insulation optical fiber composite cable in real time, thereby improving the safety when the suspended polypropylene insulation optical fiber composite cable is used. In order to achieve the above technical effects, the hanging polypropylene insulation optical fiber composite cable in this embodiment adopts the following technical scheme:

referring to fig. 1, in the present embodiment, the suspended polypropylene insulation optical fiber composite cable includes an optical fiber temperature measuring unit 10 and a reinforcing layer 40 sequentially disposed from inside to outside, and a plurality of load units 20 and a plurality of combined hoisting units 30 are disposed between the optical fiber temperature measuring unit 10 and the reinforcing layer 40; wherein: the reinforcing layer 40 includes a wrapping tape layer 41 and an outer sheath 42 which are sequentially disposed from inside to outside; the plurality of load units 20 and the plurality of combined hoisting units 30 are alternately surrounded on the circumference of the optical fiber temperature measuring unit 10, and the reinforcing layer 40 wraps the plurality of load units 20 and the plurality of combined hoisting units 30 together.

The hanging type polypropylene insulation optical fiber composite cable in the embodiment directly wraps the plurality of load units 20 and the combined hoisting unit 30 together through the reinforcing layer 40, replaces the scheme of directly using high-strength strapping tapes to be bound together in the prior art, can ensure the roundness of the cable structure through the extrusion wrapping effect of the wrapping strap layer 41 and the outer sheath 42, has lower requirements on construction conditions due to the fact that the surface of the hanging type polypropylene insulation optical fiber composite cable is round and smooth, reduces construction difficulty and construction cost, improves construction speed, and greatly reduces failure rate during construction; meanwhile, after the suspended polypropylene insulation optical fiber composite cable fails or reaches the life cycle, the cable cannot be damaged during replacement, the replacement is more convenient, the fault removal time is greatly shortened, and the orderly performance of normal production activities is ensured. The suspended polypropylene insulation optical fiber composite cable in the embodiment further comprises an optical fiber temperature measuring unit 10, wherein the optical fiber temperature measuring unit 10 is positioned at the center of the suspended polypropylene insulation optical fiber composite cable, can monitor the running condition of the peripheral load unit 20 in real time, is beneficial to the dynamic optimization of the load of the suspended polypropylene insulation optical fiber composite cable, and enables the line utilization to reach an optimal value; when the suspended polypropylene insulated optical fiber composite cable is in overload operation, the power grid dispatching can timely acquire that the suspended polypropylene insulated optical fiber composite cable is in abnormal operation state in time corrected by transferring load or cutting off the line, thereby avoiding fire caused by overheat routing of the suspended polypropylene insulated optical fiber composite cable and ensuring safe and reliable operation of the suspended polypropylene insulated optical fiber composite cable.

Specifically, the optical fiber temperature measuring unit 10, the load unit 20 and the combined hoisting unit 30 are assembled into a cable through a coiling device, then are twisted together, and the reinforcing layer 40 is coated outside the cable core after being cabled, so that the suspended polypropylene insulation optical fiber composite cable in the embodiment is finally manufactured. The twisting equipment is used for twisting and forming the cable assembly, which is a common technical means in the field, and is not repeated in the embodiment.

Further, the combined hoisting unit 30 includes a hoisting wire core 31 and a filling member 32 sequentially arranged from inside to outside, and the filling member 32 is a nonmetallic flexible member. Because the filler 32 is made of a nonmetallic flexible part, the filler is ensured to be more round when the reinforcing layer 40 is used for extruding and wrapping the combination of the optical fiber temperature measuring unit 10, the load unit 20 and the combined hoisting unit 30. The hoisting wire core 31 in this embodiment is a steel wire rope, specifically, is a steel wire rope meeting the requirements of GB 8918-2006 for important purposes, and the type and specification of the steel wire rope are determined by the tension to be borne when the suspended polypropylene insulated optical fiber composite cable is vertically hoisted, which is not described herein.

As a preferred embodiment, the filler 32 has a shore hardness of 60A to 70A. The material can be made of thermoplastic polyurethane elastomer rubber, silica gel or thermoplastic elastomer, etc., and the present example is super-soft nonmetal with the brand of CRX-90-H. The combined hoisting unit 30 is formed by extruding super-soft nonmetallic materials outside a steel wire rope through a fan-shaped extrusion die, the size of the finally formed combined hoisting unit 30 is required to ensure that the optical fiber temperature measuring unit 10, the load unit 20 and the combined hoisting unit 30 are round and gapless integrally after being assembled, the roundness of the finally formed suspended polypropylene insulated optical fiber composite cable is further ensured, and the arrangement and the maintenance during subsequent construction are convenient.

With continued reference to fig. 1, the reinforcing layer 40 in this embodiment is formed by overlapping and wrapping a reinforced nonwoven fabric around the cable core after being cabled to form a wrapping cloth layer 41, and an outer sheath 42 is formed by extrusion molding a nylon 12 (i.e., polydodecyl lactam, PA 12) material around the wrapping cloth layer 41. Specifically, the nylon 12 material in this example is identified as Degusse L2124 or Switzerland EMS L25W40X, the outer sheath 42 has a nominal thickness of 2mm, an average thickness of 1.5mm to 2.5mm, and a thinnest point thickness of 1.2mm. The outer sheath 42 thus provided has excellent wear resistance, oil resistance and chemical resistance, provides good mechanical and corrosion protection for the use of the suspended polypropylene insulated optical fiber composite cable in the scenes of mines, petroleum drilling, ships, offshore facilities and the like, effectively prolongs the service life of the cable, and can prolong the cable replacement period by approximately 20%.

Optionally, the above-mentioned wrapping tape layer 41 is overlapped and wrapped with a plurality of layers. The number of layers of the wrap is determined by the strength required to be carried by the reinforcing layer 40, the nominal thickness of the wrap tape layer 41 is 0.2mm, and the minimum overlap ratio of the wrap is not less than 10%, and is not particularly limited in this case.

As shown in fig. 2, the optical fiber temperature measuring unit 10 in the present embodiment includes a temperature measuring optical fiber 11, a filling paste 12, a metal tube 13, and an optical fiber sheath 14, which are sequentially disposed from inside to outside, wherein the filling paste 12 fills a gap between the inside of the metal tube 13 and the temperature measuring optical fiber 11. Specifically, the number of the temperature measurement optical fibers 11 is plural, 6 in this embodiment, 2 of 62.5/125 μm communication multimode optical fibers are provided, 4G 652D single mode optical fibers are provided, and 6 temperature measurement optical fibers 11 are stacked in an inverted triangle. The temperature measuring optical fiber 11 comprises a stainless steel outer layer, specifically 316L stainless steel, the wall thickness of the temperature measuring optical fiber 11 is 0.25mm, and the outer diameter of the temperature measuring optical fiber 11 is 3mm. The filling paste 12 in this embodiment is a hydrogen absorbing fiber paste; the metal tube 13 is a stainless steel tube, in particular a 304-material nonmagnetic stainless steel tube, the wall thickness is 1.25mm, and the outer diameter of the metal tube 13 is 5.5mm; the optical fiber sheath 14 is a PE sheath, the wall thickness of the sheath is 0.25mm, and the outer diameter of the optical fiber sheath 14 is 6mm.

When the optical fiber temperature measuring unit 10 is used, the temperature measuring optical fiber 11 is attached to the cable surface of the load unit 20, after the cable surface data is measured, the load current of the cable and the measured data are simultaneously drawn into a group of related curves, the temperature coefficient of the load unit 20 is calculated by the current value, and the correlation between the surface temperature of the temperature measuring optical fiber 11 and the running load current can be calculated by the difference (comparison at the same moment) between the surface temperature change of the temperature measuring optical fiber 11 and the temperature change of the load unit 20, so that the safe running of a power supply system is supported.

As shown in fig. 3, alternatively, the load unit in this embodiment is a polypropylene insulated cable, specifically, the load unit 20 includes a conductive core 21, a semiconductive shielding layer 22, an insulating layer 23, a semiconductive insulating shielding layer 24, a metal shielding layer 25, and a protective layer 26 sequentially disposed from inside to outside, the semiconductive shielding layer 22 and the semiconductive insulating shielding layer 24 are extruded thermoplastic polypropylene-based semiconductive shielding members, and the insulating layer 23 is an extruded thermoplastic polypropylene insulating member. Further, the semiconductive shield layer 22, the insulating layer 23, and the semiconductive insulating shield layer 24 are integrally extrusion-molded.

Because the semiconductive conductor shielding, insulation and semiconductive insulation shielding used for the polypropylene insulation cable are all thermoplastic materials, and three layers of coextrusion production lines are selected for one-step extrusion molding during integral extrusion, the three layers of coextrusion production processes have the following beneficial effects compared with the production of the crosslinked polyethylene insulation cable: the energy consumption (namely carbon emission) in the production process is greatly reduced without a crosslinking process, and the manufacturing cost can be reduced by 23 to 38 percent; the degassing process is not needed, the production period is greatly shortened, and the production period can be shortened by 1/4 to 1/3; the production of cross-linking byproducts is avoided, the environment-friendly performance is excellent, the regular shutdown cleaning is not needed, the continuous production can be realized, and the production efficiency is effectively improved.

Further, the nominal cross-sectional area of the conductive core 21 is 16mm ² To 630mm ² . Specifically, the conductive core 21 is a class 2 stranded conductor specified in GB/T3956-2008, and a person skilled in the art selects a cross-sectional area of the conductive core 21 according to specific requirements, which is not described herein.

Specifically, the nominal thickness of the semiconductive shield layer 22 and the semiconductive insulating shield layer 24 are each 1mm, the average thickness ranges from 0.9mm to 1.1mm, and the thinnest point thickness is not less than 0.5mm; preferably, the thinnest point thickness is 0.5mm, the thermoplastic polypropylene-based semiconductive shielding material selected for semiconductive shielding layer 22 is identified as PBB-90-35, and the thermoplastic polypropylene-based semiconductive shielding material selected for semiconductive insulating shielding layer 24 is identified as PBB-90-35 or PKB-90-35. The insulating layer 23 has a nominal thickness of 10.5mm, an average thickness ranging from 10mm to 11mm, and a thinnest point thickness of not less than 9.35mm; preferably, the thickness of the thinnest point is 9.35mm, and the brand of the thermoplastic polypropylene insulating material selected for the insulating layer 23 is PP-JC-35 or PP-JR-35.

Optionally, the metal shielding layer 25 is formed by overlapping and wrapping copper strips or by sparse winding copper wires. The structure of the metal shielding layer 25 depends on the system fault level, and the specific requirements should meet the requirements of the T/ceia 591-2022 for checking the metal shielding layer 25, which will not be described in the present embodiment.

As a preferred embodiment, the protective layer 26 is one of the cable outer protective layer materials specified in the T/CEEIA 591-2022, and the structural dimensions and performance requirements of the protective layer 26 are in accordance with the examination requirements of the cable outer protective layer in the T/CEEIA 591-2022, and can be selected by one skilled in the art according to specific requirements.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The suspended polypropylene insulated optical fiber composite cable is characterized by comprising an optical fiber temperature measuring unit (10) and a reinforcing layer (40) which are sequentially arranged from inside to outside, wherein a plurality of load units (20) and a plurality of combined hoisting units (30) are arranged between the optical fiber temperature measuring unit (10) and the reinforcing layer (40); wherein:

the reinforcing layer (40) comprises a wrapping cloth layer (41) and an outer sheath (42) which are sequentially arranged from inside to outside; the load units (20) and the combined hoisting units (30) are alternately arranged around the circumference of the optical fiber temperature measuring unit (10), and the reinforcing layer (40) wraps the load units (20) and the combined hoisting units (30).

2. The suspended polypropylene insulated optical fiber composite cable according to claim 1, wherein the optical fiber temperature measuring unit (10) comprises a temperature measuring optical fiber (11), a metal tube (13) and an optical fiber sheath (14) which are sequentially arranged from inside to outside, and a gap between the metal tube (13) and the temperature measuring optical fiber (11) is filled with filling paste (12).

3. The suspended polypropylene insulated optical fiber composite cable according to claim 1, wherein the load unit (20) comprises a conductive core (21), a semiconductive shielding layer (22), an insulating layer (23), a semiconductive insulating shielding layer (24), a metal shielding layer (25) and a protective layer (26) which are sequentially arranged from inside to outside, the semiconductive shielding layer (22) and the semiconductive insulating shielding layer (24) are extruded thermoplastic polypropylene-based semiconductive conductive shields, and the insulating layer (23) is extruded thermoplastic polypropylene insulation.

4. A suspended polypropylene insulated fiber optic composite cable according to claim 3, wherein the semiconductive conductor shield (22), the insulation layer (23) and the semiconductive insulation shield (24) are integrally formed.

5. The suspended polypropylene insulated optical fiber composite cable according to claim 4, wherein the semiconductive shield (22) and the semiconductive insulated shield (24) each have a nominal thickness of 1mm, an average thickness ranging from 0.9mm to 1.1mm, and a thinnest point thickness of no less than 0.5mm; the insulating layer (23) has a nominal thickness of 10.5mm, an average thickness ranging from 10mm to 11mm, and a thinnest point thickness of not less than 9.35mm.

6. A suspended polypropylene insulated optical fiber composite cable according to claim 3, wherein the nominal cross-sectional area of the conductive core (21) is in the range of 16mm ² To 630mm ² 。

7. A suspended polypropylene insulated optical fiber composite cable according to claim 3, wherein the metal shielding layer (25) is a copper tape overlapping wrapping layer or a copper wire sparse wrapping layer.

8. The suspended polypropylene insulated optical fiber composite cable according to claim 1, wherein the combined hoisting unit (30) comprises a hoisting wire core (31) and a filling member (32) which are sequentially arranged from inside to outside, and the filling member (32) is a nonmetal flexible member.

9. The suspended polypropylene insulated fiber optic composite cable of claim 8, wherein the filler (32) has a shore hardness of 60A to 70A.

10. A suspended polypropylene insulated optical fiber composite cable according to any one of claims 1-9, wherein the wrapping tape layer (41) is lapped and wrapped with multiple layers.