CN116931208A - Nonmetal strong impact resistant optical cable and preparation method thereof - Google Patents
Nonmetal strong impact resistant optical cable and preparation method thereof Download PDFInfo
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- CN116931208A CN116931208A CN202311183762.5A CN202311183762A CN116931208A CN 116931208 A CN116931208 A CN 116931208A CN 202311183762 A CN202311183762 A CN 202311183762A CN 116931208 A CN116931208 A CN 116931208A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 229910052755 nonmetal Inorganic materials 0.000 title abstract description 17
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 36
- 239000011241 protective layer Substances 0.000 claims abstract description 33
- 239000010410 layer Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 20
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 20
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims abstract description 19
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims abstract description 19
- 239000004760 aramid Substances 0.000 claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims description 36
- 230000000903 blocking effect Effects 0.000 claims description 19
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 239000002674 ointment Substances 0.000 claims description 7
- 229920002396 Polyurea Polymers 0.000 claims description 6
- 230000003712 anti-aging effect Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
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- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 8
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- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 1
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- 229920000049 Carbon (fiber) Polymers 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a nonmetal strong impact resistant optical cable and a preparation method thereof, wherein the nonmetal strong impact resistant optical cable comprises the following steps: the cable comprises a cable core, a water-resistant layer, an inner sheath, an impact-resistant unit, a buffer unit, a reinforcing unit, an outer sheath and a protective layer, wherein the water-resistant layer, the inner sheath, the impact-resistant unit, the buffer unit, the reinforcing unit and the outer sheath are sequentially arranged outside the cable core from inside to outside, the impact-resistant unit comprises a plurality of twisted ultrahigh molecular weight polyethylene fibers, the buffer unit comprises a plurality of twisted basalt fibers, the reinforcing unit comprises a plurality of twisted aramid fibers, and the protective layer is respectively coated on the surfaces of the ultrahigh molecular weight polyethylene fibers, the basalt fibers and the aramid fibers. By the means, the nonmetal strong impact resistant optical cable and the preparation method thereof can meet the reliability and stability requirements of outdoor communication, and have excellent electromagnetic interference resistance.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a nonmetallic anti-strong-impact optical cable and a preparation method thereof.
Background
Optical fiber, as a transmission medium, has a number of distinct advantages over conventional copper cables. Therefore, since the 70 s of the last century, fiber technology has been rapidly developed not only in the civil fields such as telecommunications, but also in outdoor applications because of its unique functions such as electromagnetic interference resistance and radiation resistance, and the advantages such as light weight and small size.
Reliability and stability of fiber optic cables in outdoor harsh environments are key factors in ensuring communication continuity and effectiveness. Outdoor environments tend to be harsh and complex and variable, requiring good adaptability of the cable under strong impact environmental conditions. In order to meet the use requirement of rapid wiring or repeated winding and unwinding, the existing outdoor optical cable generally adopts a design thought of small outer diameter and light weight, so that the strong impact resistance of the outdoor optical cable is difficult to meet the requirements of communication reliability and stability, and needs to be improved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the nonmetal strong impact resistant optical cable and the preparation method thereof, which can meet the flexible wiring installation in outdoor severe environment, ensure the electromagnetic interference resistant effect and improve the strong impact resistant performance, reliability and stability.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a nonmetallic, strong impact-resistant optical cable, including: the cable comprises a cable core, a water-resistant layer, an inner sheath, an impact-resistant unit, a buffer unit, a reinforcing unit, an outer sheath and a protective layer, wherein the water-resistant layer, the inner sheath, the impact-resistant unit, the buffer unit, the reinforcing unit and the outer sheath are sequentially arranged outside the cable core from inside to outside, the impact-resistant unit comprises a plurality of twisted ultrahigh molecular weight polyethylene fibers, the buffer unit comprises a plurality of twisted basalt fibers, the reinforcing unit comprises a plurality of twisted aramid fibers, the protective layer is respectively coated on the surfaces of the ultrahigh molecular weight polyethylene fibers, the basalt fibers and the aramid fibers, and the protective layer comprises the following components in parts by weight: 40-60 parts of flexible polyurethane, 30-40 parts of polyurea, 5-10 parts of compatilizer, 1-3 parts of accelerator and 3-5 parts of anti-aging agent.
In a preferred embodiment of the invention, the cable core comprises a non-metallic strength member and an optical fiber unit.
In a preferred embodiment of the present invention, the cable core is a layer-stranded cable core, and the layer-stranded cable core further includes a loose tube, the loose tube is stranded outside the nonmetal reinforcing member in an S-Z stranding manner, the optical fiber unit is disposed in the loose tube, and a water-blocking ointment is disposed in the loose tube.
In a preferred embodiment of the present invention, the cable core is a central tube cable core, the central tube cable core further includes a central beam tube, the nonmetallic reinforcing parts are symmetrically embedded in the inner wall of the central beam tube, the optical fiber units are arranged in the central beam tube, and a water-blocking ointment is further arranged in the central beam tube.
In a preferred embodiment of the present invention, the cable core is a skeleton cable core, the skeleton cable core further includes a supporting skeleton, the nonmetallic reinforcing part is embedded in the center of the supporting skeleton, a plurality of skeleton grooves are formed in the periphery of the supporting skeleton, the skeleton grooves are circumferentially and uniformly distributed on the supporting skeleton, and the optical fiber units are respectively arranged in the skeleton grooves.
In a preferred embodiment of the present invention, the nonmetallic reinforcing parts are FRP rods, and the optical fiber units are bulk optical fibers, ribbon optical fibers or optical fiber bundles.
In a preferred embodiment of the present invention, the thickness of the protective layer is 0.05mm to 0.15mm.
In a preferred embodiment of the present invention, the ultra-high molecular weight polyethylene fiber has a molecular weight of 150 ten thousand, the basalt fiber has a diameter of 1 μm to 3 μm, and the aramid fiber has an elastic modulus of more than 70GPa.
In a preferred embodiment of the present invention, the water-blocking layer is a wrapped or longitudinally wrapped water-blocking tape, the inner sheath is a polyethylene sheath, and the outer sheath is a polyether polyurethane sheath.
In order to solve the technical problems, the invention adopts another technical scheme that: the preparation method of the nonmetal strong impact resistant optical cable comprises the following steps:
preparing a cable core, wherein the cable core adopts one of a layer-stranding cable core, a central tube cable core and a skeleton cable core;
coating a water blocking layer outside the cable core, and longitudinally wrapping or winding the water blocking layer on the periphery of the cable core, wherein the width of the lapping edge of the water blocking layer is larger than 3mm when the water blocking layer is longitudinally wrapped; when the water blocking tape is wrapped, the wrapping overlapping rate of the water blocking tape is 20% -40%;
extruding an inner sheath outside the water-blocking layer through an extruding machine, wherein the thickness of the inner sheath is 0.8mm-1.0mm;
twisting a plurality of ultra-high molecular weight polyethylene fibers coated with a protective layer on the outer side of an inner sheath to form an impact-resistant unit, wherein the outer diameter of the ultra-high molecular weight polyethylene fibers is 1.0mm-2.0mm, the twisting pitch is 80mm-120mm, the twisting direction is the Z direction, and the paying-off tension is 6kg-10kg;
stranding a plurality of basalt fibers coated with a protective layer on the outer side of an impact-resistant unit to form a buffer unit, wherein the outer diameter of the basalt fibers is 1.0-2.0 mm, the stranding pitch is 140-180 mm, the stranding direction is the Z direction, and the paying-off tension is 6-10 kg;
twisting a plurality of aramid fibers coated with a protective layer outside a buffer unit to form a reinforcing unit, wherein the outer diameter of the aramid fibers is 1.0-2.0 mm, the twisting pitch is 200-240 mm, the twisting direction is the S direction, and the paying-off tension is 6-10 kg;
the impact-resistant unit, the buffer unit and the reinforcing unit are sequentially twisted step by step or are twisted in one step;
the outer sheath is extruded outside the reinforcing unit, and the thickness of the outer sheath is 2.0mm-2.5mm.
The beneficial effects of the invention are as follows: according to the nonmetal strong impact resistant optical cable and the preparation method thereof, the protective layer is obtained by utilizing the composite reaction of the flexible polyurethane, the polyurea, the compatilizer, the accelerator and the anti-aging agent, so that on one hand, internal materials can be protected from the influence of high temperature during extrusion molding, on the other hand, the mutual friction between units under the strong impact force is reduced, the structural integrity of the units is maintained, and the material efficiency is fully and effectively exerted;
the impact resistant unit prepared by coating the protective layer with ultra-high molecular weight polyethylene and twisting has the impact strength of about 2 times that of impact resistant plastic polycarbonate, 10 times that of nylon 66 and 20 times that of polyvinyl chloride, the impact strength of the impact resistant unit is improved along with the increase of the molecular weight, and the impact resistant unit reaches the maximum value when the molecular weight is 150 ten thousand, and has excellent impact energy absorptivity;
when the fiber diameter of the buffer unit prepared by coating a protective layer with basalt fibers is 1-3 mu m, the sound absorption coefficient of the buffer unit is obviously increased along with the increase of the audio frequency, and the sound absorption coefficient respectively reaches 0.05-0.15, 0.22-0.75 and 0.85-0.93 under the conditions that the audio frequency is 100-300Hz, 400-900Hz and 1200-7000Hz, and the minimum heat conduction coefficient of the buffer unit is 0.031W/m.k which is smaller than that of fiber materials such as carbon fibers, glass fibers and the like, so that the buffer unit has excellent sound and heat insulation effects;
the strength of the reinforcing unit prepared by coating the protective layer with the aramid fiber is 5-6 times of that of the steel wire, the strength of the glass fiber is 3 times of that of the steel wire, the toughness of the reinforcing unit is 2 times of that of the steel wire, and the reinforcing unit has the weight of only about 1/5 of that of the steel wire, and has the performances of high strength, high elastic modulus and the like;
in summary, the nonmetal strong impact resistant optical cable can have good adaptability under outdoor strong impact environment conditions, and is faced with harsh, complex and changeable outdoor environments, the strong impact resistant performance of the nonmetal strong impact resistant optical cable can meet the reliability and stability requirements of outdoor communication, and the nonmetal material is adopted in the optical cable, so that the optical cable has excellent electromagnetic interference resistant capability, and the continuous communication effect of the optical cable in severe environments is ensured.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic diagram of a nonmetallic, high impact-resistant optical cable according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the cable core of FIG. 1 using a twisted layer cable core;
FIG. 3 is a schematic view of the cable core of FIG. 1 using a central tube cable core;
FIG. 4 is a schematic view of the cable core of FIG. 1 using a skeleton type cable core;
FIG. 5 is a flow chart of a method of making a nonmetallic, high impact resistant fiber optic cable of the present invention.
Description of the embodiments
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 5, an embodiment of the present invention includes:
a nonmetallic, high impact-resistant fiber optic cable, as shown in fig. 1, comprising: the cable core 1, the water blocking layer 2, the inner sheath 3, the impact resistant unit 5, the buffer unit 6, the reinforcing unit 7, the outer sheath 8 and the protective layer 4 are sequentially arranged outside the cable core 1 from inside to outside, and in the embodiment, the water blocking layer 2 is a wrapped or longitudinally wrapped water blocking tape, so that the water blocking effect can be achieved, the loosening of the cable core 1 can be prevented, and the roundness of the cable core 1 is kept.
As shown in fig. 2 to 4, the cable core 1 includes a non-metal reinforcement 13 and an optical fiber unit 11, where the non-metal reinforcement is an FRP rod, and the fiber reinforced composite plastic has the characteristics of light weight, hardness, non-conductivity, high mechanical strength, corrosion resistance, and the like. The optical fiber units are scattered optical fibers, ribbon optical fibers or optical fiber bundles, and can be arranged in different forms and with different core numbers according to actual demands, and the selection is flexible.
As shown in fig. 2, the cable core 1 is a layer-twisted cable core, the layer-twisted cable core further includes a loose tube 12, the loose tube 12 is twisted outside the nonmetal reinforcing member 13 in an S-Z twisting manner, the twisting pitch is 60mm-90mm, the optical fiber unit 11 is arranged in the loose tube, and a water-blocking ointment is arranged in the loose tube 12, and in this embodiment, the optical fiber unit is a bulk optical fiber.
As shown in fig. 3, the cable core 1 is a central tube cable core, the central tube cable core further includes a central beam tube 14, nonmetallic reinforcing parts 13 are symmetrically embedded in the inner wall of the central beam tube 14, the optical fiber units 11 are arranged in the central beam tube 14, and water-blocking ointment is further arranged in the central beam tube 14 to perform water-blocking reinforcement, and in this embodiment, the optical fiber units select optical fiber bundles.
As shown in fig. 4, the cable core is a skeleton cable core, the skeleton cable core further includes a supporting skeleton 15, the nonmetallic reinforcing part is embedded in the center of the supporting skeleton, a plurality of skeleton grooves are formed in the periphery of the supporting skeleton, the skeleton grooves are circumferentially and uniformly distributed on the supporting skeleton, and the optical fiber units are respectively arranged in the skeleton grooves 16.
The inner sheath 3 is a polyethylene sheath, the outer sheath 8 is a polyether polyurethane sheath, and the polyether polyurethane sheath is formed by extrusion molding through an extruder, so that the waterproof effect is good, the flexibility is good, and flexible wiring installation in outdoor severe environments is facilitated.
The impact-resistant unit 5 comprises a plurality of twisted ultra-high molecular weight polyethylene fibers, the molecular weight of the ultra-high molecular weight polyethylene fibers is 150 ten thousand, the ultra-high molecular weight polyethylene has the special properties of small density, high specific strength and high specific modulus, has the strongest energy absorption at the molecular weight of 150 ten thousand, and thus has outstanding impact resistance, is an excellent optical cable impact-resistant material, but has poor high temperature resistance, thus the material itself needs to be coated with the protective layer 4, and the buffer unit 6 is arranged outside for heat insulation, sound insulation and buffer protection.
The buffer unit 6 comprises a plurality of stranded basalt fibers, has excellent sound and heat insulation effects, and plays a good role in resisting strong impact and buffering. In the embodiment, the diameter of the basalt fiber is 1-3 mu m, the basalt fiber has the special properties of electric insulation, corrosion resistance and high temperature resistance, excellent moisture absorption performance can be maintained even in an underwater environment, the hydrogen loss of the optical fiber is effectively avoided, the transmission performance of the optical cable is ensured, and the basalt fiber can be directly degraded in the environment as an inorganic environment-friendly high-performance fiber material, and environmental pollution is avoided.
The reinforcing unit 7 comprises a plurality of twisted aramid fibers, in this embodiment, the elastic modulus of the aramid fibers is greater than 70Gpa, the aramid fibers have special properties of low density, high tensile modulus, high breaking strength and low breaking elongation, the mechanical properties of the whole optical cable are improved, the inherent stability, the very low shrinkage, the lower creep and the very high glass transition temperature can be maintained at a higher temperature, and in addition, the aramid fibers have higher corrosion resistance, are non-conductive, have stronger chemical resistance besides strong acid and strong alkali, are superior optical cable reinforcing unit materials, and can meet the requirements of outdoor communication reliability and stability.
In addition, the protective layer 4 is respectively coated on the surfaces of the ultra-high molecular weight polyethylene fiber, the basalt fiber and the aramid fiber, and in the embodiment, the thickness of the protective layer is 0.05 mm-0.15 mm, so that the unit materials are protected from the influence of extrusion molding high temperature and the mutual friction effect caused by strong impact force, and the material efficiency is fully and effectively exerted.
The protective layer comprises the following components in parts by weight: 40-60 parts of flexible polyurethane, 30-40 parts of polyurea, 5-10 parts of compatilizer, 1-3 parts of accelerator and 3-5 parts of anti-aging agent.
Hereinafter, the preparation and detection of the protective layer 4 were performed in three groups of examples, in which specific components of the protective layer 4 are as follows in table 1:
referring to table 1, flexible polyurethane is used as a base material, polyurea is prepared to be compatible with the base material, an integral structure system of a protection unit is generated, and a compatilizer and an accelerator are adopted to accelerate the speed of the compatible reaction of the polyurea and the base material; the chemical property of the protective layer is improved by adopting an anti-aging agent, so that the protective layer has anti-aging property.
Specifically, the compatilizer can be any one of dimethylbenzene or acetone, the accelerator is any one of accelerator D, accelerator M and accelerator CZ, and the antioxidant is one or more of antioxidant 4010NA, antioxidant RD and antioxidant MB.
The impact resistance of the optical cable with different components of protective layer 4 under different cable core 1 structures is detected, and the detection structure is shown in the following table 2:
obviously, the impact energy is absorbed by the impact-resistant unit 5, the heat and sound insulation of the buffer unit 6 and the protection effect of the reinforcing unit 7 are enhanced, and the protection of the protection layer is added, so that the impact energy of the optical cable is obviously improved to 200 joules, which is at least 20 times higher than that of the conventional nonmetal field optical cable, and the outdoor application value is good.
As shown in fig. 5, a method for preparing a nonmetallic anti-strong impact optical cable comprises the following steps:
preparing a cable core, wherein the cable core adopts one of a layer-stranded cable core, a central tube type cable core and a skeleton type cable core, in the embodiment, taking the layer-stranded cable core as an example, coloring and curing an optical fiber under 40g paying-off tension, coating a coloring layer outside a bare optical fiber, and completing taking-up under 45g taking-up tension to obtain a colored optical fiber as an optical fiber unit 11;
preparing a loose tube by adopting an ointment filling type plastic sleeving process, wherein in the plastic sleeving process, the optical fiber unit 11 enters a fiber passing needle tube through a paying-off device and a tension stabilizing device, and then the loose tube is extruded by a machine head of an extruding machine, and meanwhile, the roundness of the loose tube is ensured according to online measurement, so that the residual length of the optical fiber is ensured to be within the process requirement range;
paying out a plurality of loose tubes 12 from a pay-off rack at a paying-off tension of 200g, and twisting the loose tubes together with a central nonmetallic reinforcing part 13 through a branching plate and twisting equipment at a certain twisting pitch to form a cable core, as shown in fig. 2;
the cable core 1 is coated with a water blocking layer, in the embodiment, a water blocking belt is adopted to wrap the periphery of the cable core, and the wrapping overlapping rate of the water blocking belt is 20% -40%;
extruding an inner sheath outside the water-blocking layer through an extruding machine, wherein the thickness of the inner sheath is 0.8mm-1.0mm;
twisting a plurality of ultra-high molecular weight polyethylene fibers coated with a protective layer on the outer side of an inner sheath to form an impact-resistant unit 5, wherein the outer diameter of the ultra-high molecular weight polyethylene fibers is 1.0mm-2.0mm, the twisting pitch is 80mm-120mm, the twisting direction is the Z direction, and the paying-off tension is 6kg-10kg;
stranding a plurality of basalt fibers coated with a protective layer on the outer side of an impact-resistant unit 5 to form a buffer unit 6, wherein in the embodiment, the outer diameter of the basalt fibers is 1.0mm-2.0mm, the stranding pitch is 140mm-180mm, the stranding direction is the Z direction, and the paying-off tension is 6kg-10kg;
twisting a plurality of aramid fibers coated with a protective layer outside the buffer unit 6 to form a reinforcing unit 7, wherein the outer diameter of the aramid fibers is 1.0mm-2.0mm, the twisting pitch is 200mm-240mm, the twisting direction is the S direction, and the paying-off tension is 6kg-10kg;
in the embodiment, the impact-resistant unit 5, the buffer unit 6 and the reinforcing unit 7 are twisted and formed in one step, so that the production efficiency is improved;
and extruding an outer sheath 8 outside the reinforcing unit 7, wherein the thickness of the outer sheath is 2.0mm-2.5mm, and thus the preparation of the nonmetallic high impact resistant optical cable is completed.
In conclusion, the nonmetal strong impact resistant optical cable and the preparation method thereof have the advantages of improving the strong impact resistant effect, along with high reliability, good stability and good electromagnetic interference resistant effect, and are suitable for rapid wiring or repeated retraction of a field communication system; radar, aviation and ship wiring; in fields such as oil field, mine, port, television site rebroadcasting and communication line rush repair.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention or by other related art, either directly or indirectly, are intended to be included within the scope of the invention.
Claims (10)
1. A nonmetallic, high impact resistant fiber optic cable, comprising: the cable comprises a cable core, a water-resistant layer, an inner sheath, an impact-resistant unit, a buffer unit, a reinforcing unit, an outer sheath and a protective layer, wherein the water-resistant layer, the inner sheath, the impact-resistant unit, the buffer unit, the reinforcing unit and the outer sheath are sequentially arranged outside the cable core from inside to outside, the impact-resistant unit comprises a plurality of twisted ultrahigh molecular weight polyethylene fibers, the buffer unit comprises a plurality of twisted basalt fibers, the reinforcing unit comprises a plurality of twisted aramid fibers, the protective layer is respectively coated on the surfaces of the ultrahigh molecular weight polyethylene fibers, the basalt fibers and the aramid fibers, and the protective layer comprises the following components in parts by weight: 40-60 parts of flexible polyurethane, 30-40 parts of polyurea, 5-10 parts of compatilizer, 1-3 parts of accelerator and 3-5 parts of anti-aging agent.
2. The nonmetallic high impact-resistant optical cable of claim 1, wherein the cable core comprises a nonmetallic strength member and an optical fiber unit.
3. The nonmetallic high impact-resistant optical cable of claim 2, wherein the cable core is a layer-stranded cable core, the layer-stranded cable core further comprises a loose tube, the loose tube is stranded outside the nonmetallic reinforcing part in an S-Z stranding mode, the optical fiber unit is arranged in the loose tube, and water-blocking ointment is arranged in the loose tube.
4. The nonmetallic high impact resistant optical cable of claim 2, wherein the cable core is a central tube cable core, the central tube cable core further comprises a central beam tube, the nonmetallic reinforcing parts are symmetrically embedded in the inner wall of the central beam tube, the optical fiber unit is arranged in the central beam tube, and water-blocking ointment is further arranged in the central beam tube.
5. The nonmetallic and high impact-resistant optical cable according to claim 2, wherein the cable core is a skeleton cable core, the skeleton cable core further comprises a supporting skeleton, the nonmetallic reinforcing part is embedded in the center of the supporting skeleton, a plurality of skeleton grooves are formed in the periphery of the supporting skeleton, the skeleton grooves are circumferentially and uniformly distributed on the supporting skeleton, and the optical fiber units are respectively arranged in the skeleton grooves.
6. The nonmetallic high impact-resistant optical cable of claim 2, wherein the nonmetallic strength member is an FRP rod, and the optical fiber unit is a bulk optical fiber, a ribbon optical fiber, or an optical fiber bundle.
7. The nonmetallic high impact-resistant optical cable according to claim 1, wherein the thickness of the protective layer is 0.05mm to 0.15mm.
8. The nonmetallic high impact-resistant optical cable according to claim 1, wherein the ultra-high molecular weight polyethylene fiber has a molecular weight of 150 ten thousand, the basalt fiber has a diameter of 1 μm to 3 μm, and the aramid fiber has an elastic modulus of more than 70GPa.
9. The nonmetallic high impact-resistant optical cable of claim 1, wherein the water-blocking layer is a wrapped or longitudinally wrapped water-blocking tape, the inner jacket is a polyethylene jacket, and the outer jacket is a polyether polyurethane jacket.
10. A method for preparing a nonmetallic anti-strong-impact optical cable, which is used for preparing the nonmetallic anti-strong-impact optical cable as defined in any one of claims 1 to 9, and is characterized by comprising the following steps:
preparing a cable core, wherein the cable core adopts one of a layer-stranding cable core, a central tube cable core and a skeleton cable core;
coating a water blocking layer outside the cable core, and longitudinally wrapping or winding the water blocking layer on the periphery of the cable core, wherein the width of the lapping edge of the water blocking layer is larger than 3mm when the water blocking layer is longitudinally wrapped; when the water blocking tape is wrapped, the wrapping overlapping rate of the water blocking tape is 20% -40%;
extruding an inner sheath outside the water-blocking layer through an extruding machine, wherein the thickness of the inner sheath is 0.8mm-1.0mm;
twisting a plurality of ultra-high molecular weight polyethylene fibers coated with a protective layer on the outer side of an inner sheath to form an impact-resistant unit, wherein the outer diameter of the ultra-high molecular weight polyethylene fibers is 1.0mm-2.0mm, the twisting pitch is 80mm-120mm, the twisting direction is the Z direction, and the paying-off tension is 6kg-10kg;
stranding a plurality of basalt fibers coated with a protective layer on the outer side of an impact-resistant unit to form a buffer unit, wherein the outer diameter of the basalt fibers is 1.0-2.0 mm, the stranding pitch is 140-180 mm, the stranding direction is the Z direction, and the paying-off tension is 6-10 kg;
twisting a plurality of aramid fibers coated with a protective layer outside a buffer unit to form a reinforcing unit, wherein the outer diameter of the aramid fibers is 1.0-2.0 mm, the twisting pitch is 200-240 mm, the twisting direction is the S direction, and the paying-off tension is 6-10 kg;
the impact-resistant unit, the buffer unit and the reinforcing unit are sequentially twisted step by step or are twisted in one step;
the outer sheath is extruded outside the reinforcing unit, and the thickness of the outer sheath is 2.0mm-2.5mm.
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