CN111562657A - Armored micro-beam optical cable and manufacturing method thereof - Google Patents
Armored micro-beam optical cable and manufacturing method thereof Download PDFInfo
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- CN111562657A CN111562657A CN202010443786.XA CN202010443786A CN111562657A CN 111562657 A CN111562657 A CN 111562657A CN 202010443786 A CN202010443786 A CN 202010443786A CN 111562657 A CN111562657 A CN 111562657A
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- 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
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- 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
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- 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
Abstract
The armored micro-bundle optical cable comprises a micro-bundle pipe and a water-blocking yarn twisted on the micro-bundle pipe, and further comprises a water-blocking tape, an inner jacket, an armored tape and an outer jacket, wherein the water-blocking tape, the inner jacket, the armored tape and the outer jacket are wrapped outside the micro-bundle pipe and the water-blocking yarn, the water-blocking tape comprises a first water-blocking tape and a second water-blocking tape, the first water-blocking tape is arranged between the micro-bundle pipe and the inner jacket, and the second water-blocking tape is arranged between the inner jacket and the armored tape. The armored microbeam optical cable adopts an armored belt to protect the internal structure of the optical cable, the optical cable has the performances of stretch resistance, side pressure resistance and impact resistance, direct-buried construction can be carried out in extreme geographical environments, the construction cost is reduced, the internal and external double-layer water-blocking belts can ensure that the dryness of the interior of the optical cable can be still ensured and signal transmission is ensured under the high-humidity environment, and the manufacturing method is suitable for optical cables with various cores.
Description
Technical Field
The application relates to the field of cable production, in particular to an armored micro-beam optical cable and a manufacturing method thereof.
Background
Compared with the common outdoor optical cable based on the PBT loose tube, the outdoor optical cable based on the micro-beam tube has more convenient stripping performance and bending performance in the using process, so that the outdoor optical cable is more dominant in the laying, installation and personnel operation processes.
The requirement on the micro-beam optical cable with the large core number is increased day by day, but in the construction process of the pipeline cable with the large core number, the construction can be carried out only in a pipe penetrating mode, the pipeline resources need to be arranged in advance, direct-buried construction cannot be directly carried out if extreme geographical environments are met, the construction cost is greatly increased, and meanwhile, the optical unit in the optical cable cannot be protected better under the environments; the optical cable cannot meet the high-requirement performances of stretching, side pressure, impact and the like, so that the optical unit in the optical cable is damaged in the construction and use processes; in a high-humidity geographical environment, the inside of the optical cable cannot completely block water, so that an internal optical unit is corroded, and the optical cable cannot normally work.
Disclosure of Invention
In view of the above, there is a need for an armored microbeam optical cable and a manufacturing method thereof, which can achieve a good water-blocking effect, can be used for direct-buried construction, and can reduce the construction cost.
The embodiment of the application provides an armor microbeam optical cable, including the microbeam pipe and twist in the yarn that blocks water of microbeam pipe, the armor microbeam optical cable still including the cladding in the microbeam pipe with block water outer water-blocking tape, inner sheath, armor area, oversheath of yarn, the water-blocking tape includes first water-blocking tape and second water-blocking tape, first water-blocking tape set up in between microbeam pipe and the inner sheath, the second water-blocking tape set up in between inner sheath and the armor area.
Further, in some embodiments of the present application, the armor tape comprises a steel or aluminum tape, and the armor tape has a gauge D3＝D4+M2×2+M3×2+K1Wherein D is4Is the outer diameter of the inner sheath, M2Thickness of the armor tape, M3Thickness of the water-blocking tape, K1The correction coefficient is 1 to 1.5 mm.
Further, in some embodiments of the present application, the armored micro-beam optical cable further includes a color line, the color line is used for combining a plurality of micro-beam tubes into one bundle, each bundle is distinguished by the color lines with different colors, the thickness of the color line is 0.1-0.2 mm, and the equivalent width is 0.1-2 mm.
Further, in some embodiments of the present application, the inner lumen half of the inner sheath
The diameter is as follows:
wherein M is1Is the thickness of the color line, N1Number of color lines, N2For equivalent number of water-blocking yarns, N3Number of micro-beam tubes, D2The diameter of the micro-beam tube is the outer diameter of the micro-beam tube, K is a correction coefficient, and the value of K is 0.5-1.5 mm.
Further, in some embodiments of the present application, the armored micro-bundle fiber optic cable further includes a ripcord disposed in the second water-blocking tape or the outer jacket.
Further, in some embodiments of the present application, the armored micro-bundle fiber optic cable further includes non-metallic strength members embedded in the inner jacket.
Further, in some embodiments of the present application, the material of the microbeam tube jacket includes one or more combinations of low smoke, zero halogen, flame retardant polyolefin material, polyvinyl chloride, thermoplastic polyester elastomer.
Further, in some embodiments of the present application, the micro-bundle tube includes an optical fiber, a fiber paste, and a micro-bundle tube sheath, the optical fiber is disposed in the micro-bundle tube sheath, and the fiber paste is filled in the micro-bundle tube sheath.
Further, in some embodiments of the present application, the optical fiber is SZ twisted or S twisted inside the sheath of the micro-bundle tube, and the wall thickness of the sheath of the micro-bundle tube is 0.1-0.2 mm.
The embodiment of the application also provides a manufacturing method of the armored micro-beam optical cable, which comprises the following steps:
setting extrusion molding temperature, and extruding a micro-beam tube outside the optical fiber;
stranding a plurality of micro-beam tubes into a plurality of bundles, wherein each bundle is used as a cable core and carries out color line marking to obtain a plurality of marked cable cores;
twisting the water-blocking yarn and the plurality of cable cores, coating a first water-blocking tape on the twisted water-blocking yarn and the twisted cable cores, and extruding an inner sheath outside the first water-blocking tape;
and coating the second water-blocking tape on the inner jacket, coating the armor tape on the second water-blocking tape, extruding the outer jacket on the armor tape, and cooling to obtain the armored micro-beam optical cable.
The armored microbeam optical cable adopts an armored belt to protect the internal structure of the optical cable, the optical cable has the performances of stretch resistance, side pressure resistance and impact resistance, direct-buried construction can be carried out in an extreme geographical environment, the construction cost is reduced, and the internal and external double-layer water-blocking belts can still ensure the dryness inside the optical cable and ensure signal transmission in a high-humidity environment.
Drawings
Fig. 1 is a schematic structural diagram of a microbeam tube according to an embodiment of the present application.
Fig. 2 is a schematic cross-sectional view of an armored micro-bundle cable according to an embodiment of the present application.
Fig. 3 is a schematic cross-sectional view of an armored micro-beam cable according to embodiment 1 of the present application.
Fig. 4 is a schematic cross-sectional view of an armored micro-beam cable according to embodiment 2 of the present application.
Fig. 5 is a schematic cross-sectional view of an armored micro-beam cable according to embodiment 3 of the present application.
Fig. 6 is a schematic cross-sectional view of an armored micro-beam cable according to embodiment 4 of the present application.
Description of the main elements
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides an armor microbeam optical cable, including the microbeam pipe and twist in the yarn that blocks water of microbeam pipe, the armor microbeam optical cable still including the cladding in the microbeam pipe with block water outer water-blocking tape, inner sheath, armor area, oversheath of yarn, the water-blocking tape includes first water-blocking tape and second water-blocking tape, first water-blocking tape set up in between microbeam pipe and the inner sheath, the second water-blocking tape set up in between inner sheath and the armor area.
The embodiment of the application also provides a manufacturing method of the armored micro-beam optical cable, which comprises the following steps:
setting extrusion molding temperature, and extruding a micro-beam tube outside the optical fiber;
stranding a plurality of micro-beam tubes into a plurality of bundles, wherein each bundle is used as a cable core and carries out color line marking to obtain a plurality of marked cable cores;
twisting the water-blocking yarn and the plurality of cable cores, coating a first water-blocking tape on the twisted water-blocking yarn and the twisted cable cores, and extruding an inner sheath outside the first water-blocking tape;
and coating the second water-blocking tape on the inner jacket, coating the armor tape on the second water-blocking tape, extruding the outer jacket on the armor tape, and cooling to obtain the armored micro-beam optical cable.
The armored microbeam optical cable adopts an armored belt to protect the internal structure of the optical cable, the optical cable has the performances of stretch resistance, side pressure resistance and impact resistance, direct-buried construction can be carried out in an extreme geographical environment, the construction cost is reduced, and the internal and external double-layer water-blocking belts can still ensure the dryness of the internal part of the optical cable and ensure signal transmission in a high-humidity environment.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Herein, "SZ twisting" means left-right twisting. The twisting direction of twisting is divided into left direction and right direction, the left direction is similar to the S direction, and the right direction is similar to the Z direction.
Referring to fig. 1, a micro-beam tube 10 shown in fig. 1 includes an optical fiber 11, a fiber paste 12 and a micro-beam tube sheath 13, wherein the optical fiber 11 is disposed in the micro-beam tube sheath 13, and the fiber paste 12 is filled in the micro-beam tube sheath 13. The optical fiber inside the microbeam tube jacket 13 is at least one optical fiber, the optical fiber 11 is typically a single mode optical fiber, and the size of the optical fiber 11 can be nominally 250 μm, 200 μm, and 180 μm, and when the number of the optical fibers 11 is more than one, it is typically distinguished by coloring. The optical fibers 11 are usually SZ-stranded or S-stranded within the microbeam tube jacket 13. It will be appreciated that the dimensions of the optical fiber 11 are not limited to the above-mentioned limitations and may be adjusted according to specific requirements. In one embodiment, the density of the fiber paste 12 is 0.5 to 0.88g/cm3The water content is less than or equal to 0.03 percent, and the fiber paste 12 is clean and free of impurities and corrosion to optical fibers. The wall thickness of the microbeam tube sheath 13 is 0.1-0.2 mm. The material of the microbeam tube jacket 13 comprises one or more combinations of low smoke halogen-free flame retardant polyolefin material (LSZH), polyvinyl chloride (PVC) and thermoplastic polyester elastomer (TPEE). In other placesIn an embodiment, the material of the microbeam tube jacket 13 may also include other polyolefin materials. The material density of the microbeam tube sheath 13 is usually 1-1.5 g/cm3The tensile strength is 10-20 MPa, and the elongation at break is 100% -500%.
In one embodiment, when the outer diameter of the optical fiber 11 is nominally 250 μm, the outer diameter of the 4-core microbeam tube jacket 13 is 1.0 ± 0.1mm, the outer diameter of the 6-core microbeam tube jacket 13 is 1.1 ± 0.1mm, and the outer diameter of the 12-core microbeam tube jacket 13 is 1.3 ± 0.1 mm. In another embodiment, when the optical fiber 11 has an outer diameter of 200 μm, the outer diameter of the microbeam tube jacket 13 of 4 cores is 0.9 ± 0.1mm, the outer diameter of the microbeam tube jacket 13 of 6 cores is 1.0 ± 0.1mm, and the outer diameter of the microbeam tube jacket 13 of 12 cores is 1.2 ± 0.1 mm.
Referring to fig. 2, an armored micro-bundle optical cable 100 includes at least one micro-bundle tube 10, a first water-blocking tape 20, an inner sheath 30, a second water-blocking tape 40, an armored tape 50, and an outer sheath 60, which are sequentially wrapped.
In one embodiment, the armored micro-bundle cable 100 has an overall dimension of 23.0 ± 1.15 mm.
In one embodiment, the microbeam tube 10 is helically stranded, and may be SZ stranded or S stranded.
In an embodiment, the armored micro-bundle optical cable 100 further includes color lines and water-blocking yarns 70, where the color lines are used to combine 6 to 12 micro-bundle tubes 10 into one bundle, and each bundle is divided by color lines of different colors and then twisted together with the water-blocking yarns 70 to form a cable core. In one embodiment, when the number of the microbeam tubes 10 exceeds 12, the distinction is made by using different numbers of color patches or color rings by spray printing. In one embodiment, the color thread is a polyester yarn, an aramid yarn or a polyester tape, the thickness of the color thread is 0.1-0.2 mm, and the equivalent width of the color thread is 0.1-2 mm.
In one embodiment, the water-blocking yarn 70 is disposed in the gap of the micro-bundle tube 10, the water-blocking yarn 70 is formed by compounding crosslinked polyacrylate expansion powder, the expansion rate is greater than or equal to 90ml/g/min, the expansion rate is greater than or equal to 110ml/g, the tensile strength is greater than or equal to 100N, and the elongation at break is greater than or equal to 15%. In one embodiment, the water-blocking yarns 70 have a linear density of 3000 m/kg. It is understood that the linear density of the water blocking yarn 70 may also be 4000m/kg, 5000m/kg, 6000m/kg, etc., without being limited to the above-mentioned setting.
In an embodiment, the first water-blocking tape 20 and the second water-blocking tape 40 are double-sided water-blocking tapes, and are formed by sequentially compounding polyester fiber non-woven fabric, high water-absorption expansion material and polyester fiber non-woven fabric, the water-absorption expansion material is usually formed by compounding crosslinked polyacrylate expansion powder, and is not only stable in heat resistance and chemical resistance, but also free of acid and alkali, the thickness of the water-blocking tape is less than or equal to 0.25mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or. In one embodiment, the first and second water-blocking tapes 20 and 40 have the same or different thicknesses.
In one embodiment, the armored micro-bundle cable 100 further includes a ripcord 80, and the ripcord 80 is disposed in the second water-blocking tape 40 or the outer sheath 60. In one embodiment, the tearing rope 80 may be aramid or polyester yarn, and has a linear density of not less than 333tex, a tensile strength of not less than 150N, an elongation at break of not less than 12%, a softening point of not less than 238 ℃ and a melting point of not less than 265 ℃.
The inner sheath 30 material is a polyolefin material. In one embodiment, the inner sheath 30 is made of medium density polyethylene or high density polyethylene, and may also be a low smoke halogen-free flame retardant polyolefin material.
The radius of the inner cavity of the optical cable is defined as half of the equivalent diameter of the cable core plus a correction coefficient, namely R is (D + K)/2, wherein R is the radius of the inner cavity of the optical cable, D is the equivalent diameter of the cable core, K is the correction coefficient, and K generally takes the value of 0.5-1.5 mm. In one embodiment, the cable lumen radius is the lumen radius of the inner sheath 30.
Equivalent diameter D ═ M of cable core1×N1+D1 2+N2×0.432)1/2Wherein M is1Is the thickness of the color line, N1Number of color lines, N2The equivalent number of the water-blocking yarn is the total density specification of the water-blocking yarn divided by 1420Denier (Denier), D1Twisting micro-beam tubes in optical cableAnd equivalent diameter defined as D1＝1.16×N3 1/2×D2，N3Number of micro-beam tubes, D2Is the outer diameter of the micro-beam tube.
At least one non-metal reinforcing piece 31 is embedded in the inner sheath 30. In one embodiment, the non-metallic reinforcement 31 is a Fiberglass Reinforced Plastic (FRP) rod having a density of 2.05 to 2.15g/cm3The tensile and bending strength is more than or equal to 1100MPa, the tensile and bending elastic modulus is more than or equal to 50GPa, the elongation at break is less than or equal to 4 percent, the water absorption is less than or equal to 0.1 percent, and the thermal expansion coefficient is lower than 5 × 10～5～6×10～5K～1And the acid and alkali resistance and the chemical property are stable. In one embodiment, to ensure the adhesion between the FRP and the inner sheath 30, the surface of the non-metallic reinforcement 31 is coated with a layer of organic polymer, and the pulling force between the FRP and the inner sheath 30 is greater than or equal to 50N.
The thickness of the armor belt 50 is 0.1-0.2 mm, the peeling strength is larger than or equal to 6.13N/cm, the tensile strength meets 310-390 MPa, and the elongation at break is larger than or equal to 15%. In one embodiment, the armor tape 50 comprises a steel or aluminum tape. Sizing D of the armor tape 503＝D4+M2×2+M3×2+K1，D4Is the outer diameter, M, of the inner sheath 302Thickness of the armor tape 50, M3Thickness of the water-blocking tape, K1The correction coefficient is generally 1-1.5 mm.
In one embodiment, the material of the outer sheath 60 is medium density polyethylene or high density polyethylene.
The present application will be further illustrated by the following specific examples.
Example 1
Referring to fig. 3, the number of the optical fibers 11 is 72, 12 optical fibers 11 are arranged in each micro-beam tube 10, the outer diameter of the 12-core micro-beam tube 10 is 1.3 ± 0.1mm, and the color of the micro-beam tube 10 is red, blue, green, yellow, purple, white. The optical fiber 11 is red, blue, green, yellow, purple, white, orange, gray, brown, black, cyan and powder, the optical fiber 11 is G.657A2 optical fiber, the coating diameter of the colored optical fiber is 250 μm +/-15 μm, and the optical fiber 11 is stranded in the micro-beam tube 10 by SZ. Each micro-beam tube 10 is filled with fiber paste 12, so that water column of 1 meter and micro-beam tube of 3 meters are ensured, and water seepage does not occur within 24 hours.
The wall thickness of the microbeam tube sheath 13 is generally 0.1-0.2 mm, the microbeam tube sheath 13 is made of TPEE material, and the density is generally 1.0-1.4 g/cm3The tensile strength is usually 10-17 MPa, and the elongation at break is usually 200-250%. The microbeam tube 10 is helically S-stranded within the sheath.
The water-blocking yarn 70 has the linear density of 3000m/kg and the number of 5, the expansion rate is more than or equal to 90ml/g/min, the expansion rate is more than or equal to 110ml/g, the tensile strength is more than or equal to 100N, and the elongation at break is more than or equal to 15%.
The first water-blocking tape 20 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 22mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
The inner sheath 30 is embedded with 2 non-metal reinforcements 31 in parallel, and the size of the non-metal reinforcements 31 is 1.4 +/-0.1 mm. Inner sheath 30 is made of high density polyethylene material, the sheath wall thickness of inner sheath 30 is nominally 2.6mm, and the outer diameter of inner sheath 30 is nominally 10.9 mm. The outer portion of the inner sheath 30 is provided with a steel belt armored belt 50, the thickness of the steel belt is 0.15mm, the peeling strength is larger than or equal to 6.13N/cm, the tensile strength meets 310-390 MPa, the breaking elongation is larger than or equal to 15%, and the diameter of the steel belt is 13 mm.
The second water-blocking tape 40 is filled between the steel belt and the inner sheath 30, the second water-blocking tape 40 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 46mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
The tearing rope 80 is made of aramid fiber, the tensile strength is more than or equal to 150N, the breaking elongation is more than or equal to 12%, the softening point is more than or equal to 238 ℃, and the melting point is more than or equal to 265 ℃.
The outer sheath 60 is made of high-density polyethylene, the wall thickness of the outer sheath 60 is nominally 2.0mm, and the overall outer diameter of the optical cable is nominally 17.0 mm.
Example 2
Referring to fig. 4, the number of cores of the optical fibers 11 is 432, 12 optical fibers 11 are arranged in each micro-beam tube 10, the outer diameter of the 12 micro-beam tube 10 is 1.3 ± 0.1mm, the color of 36 micro-beam tubes 10 is blue, orange, green, brown, gray, white, red, black, yellow, purple, powder, cyan, blue plus 1 black ring, orange plus 1 black ring, green plus 1 black ring, brown plus 1 black ring, gray plus 1 black ring, white plus 1 black ring, red plus 1 black ring, black plus 1 white ring, yellow plus 1 black ring, purple plus 1 black ring, pink plus 1 black ring, cyan plus 1 black ring, blue plus 2 black rings, orange plus 2 black rings, green plus 2 black rings, brown plus 2 black rings, gray plus 2 black rings, white plus 2 black rings, red plus 2 black rings, black plus 2 white rings, Yellow plus 2 black rings, purple plus 2 black rings, pink plus 2 black rings, and cyan plus 2 black rings. The 36 micro-bundle tubes 10 are combined into 3 bundles by the color lines, the number of the color lines is 3, the color lines are polyester yarns, and the thickness of the color lines is 0.1 mm. The optical fiber 11 is red, blue, green, yellow, purple, white, orange, gray, brown, black, cyan and powder, the optical fiber 11 is G.657A2 optical fiber, the diameter of the colored optical fiber coating is 250 μm +/-15 μm, and the optical fiber 11 is stranded in the micro-beam tube 10 by SZ. Each micro-beam tube 10 is filled with fiber paste 12, so that water column of 1 meter and micro-beam tube of 3 meters are ensured, and water seepage does not occur within 24 hours.
The wall thickness of the microbeam tube sheath 13 is generally 0.1-0.2 mm, the microbeam tube sheath 13 is made of TPEE material, and the density is generally 1.0-1.4 g/cm3The tensile strength is usually 10-17 MPa, and the elongation at break is usually 200-250%. The microbeam tube 10 is helically S-stranded within the sheath.
The water-blocking yarn 70 has the linear density of 3000m/kg and the number of 26, the expansion rate is more than or equal to 90ml/g/min, the expansion rate is more than or equal to 110ml/g, the tensile strength is more than or equal to 100N, and the elongation at break is more than or equal to 15%.
The first water-blocking tape 20 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 40mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
2 FRP reinforcements 31 are embedded in the inner sheath 30 in parallel, and the size of the reinforcements 31 is 1.6 +/-0.1 mm. The inner sheath 30 is made of high density polyethylene material, the wall thickness of the inner sheath 30 is nominally 2.4mm, and the outer diameter of the inner sheath 30 is nominally 16.4 mm. The outer portion of the inner sheath 30 is provided with a steel belt armored belt 50, the thickness of the steel belt is 0.15mm, the peeling strength is larger than or equal to 6.13N/cm, the tensile strength meets 310-390 MPa, the breaking elongation is larger than or equal to 15%, and the steel belt sizing is 18.5 mm. A second water-blocking tape is filled between the steel belt and the inner sheath 30, the second water-blocking tape 40 is a double-sided water-blocking tape, the thickness of the second water-blocking tape 40 is 0.2mm, the width of the second water-blocking tape is 60mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
The tearing rope 80 is made of aramid fiber, the tensile strength is more than or equal to 150N, the breaking elongation is more than or equal to 12%, the softening point is more than or equal to 238 ℃, and the melting point is more than or equal to 265 ℃.
The outer sheath 60 is made of high-density polyethylene, the wall thickness of the outer sheath 60 is nominally 2.0mm, and the overall outer diameter of the optical cable is nominally 22.5 mm.
Example 3
Referring to fig. 5, the number of the optical fibers 11 is 144, 12 optical fibers 11 are disposed in each micro-beam tube 10, the outer diameter of the 12-core micro-beam tube 10 is 1.3 ± 0.1mm, and the color of the micro-beam tube 10 is red, blue, green, yellow, purple, white, orange, gray, brown, black, cyan, and pink. The optical fiber 11 is red, blue, green, yellow, purple, white, orange, gray, brown, black, cyan and powder, the optical fiber 11 is G.657A2 optical fiber, the coating diameter of the colored optical fiber is 250 μm +/-15 μm, and the optical fiber 11 is stranded in the micro-beam tube 10 by SZ. Each micro-beam tube 10 is filled with fiber paste 12, so that water column of 1 meter and micro-beam tube of 3 meters are ensured, and water seepage does not occur within 24 hours.
The wall thickness of the microbeam tube sheath 13 is generally 0.1-0.2 mm, the microbeam tube sheath 13 is made of TPEE material, and the density is generally 1.0-1.4 g/cm3The tensile strength is usually 10-17 MPa, and the elongation at break is usually 200-250%. The microbeam tube 10 is helically S-stranded within the sheath.
The water-blocking yarn 70 has the linear density of 3000m/kg and 9 yarns, the expansion rate is more than or equal to 90ml/g/min, the expansion rate is more than or equal to 110ml/g, the tensile strength is more than or equal to 100N, and the elongation at break is more than or equal to 15%.
The first water-blocking tape 20 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 26mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
4 non-metal reinforcements 31 are embedded in the inner sheath 30 in parallel, and the size of each non-metal reinforcement 31 is 1.4 +/-0.1 mm. Inner sheath 30 is made of high density polyethylene material, the wall thickness of inner sheath 30 is nominally 2.6mm, and the outer diameter of inner sheath 30 is nominally 12.5 mm. The outer portion of the inner sheath 30 is provided with a steel belt armored belt 50, the thickness of the steel belt is 0.15mm, the peeling strength is larger than or equal to 6.13N/cm, the tensile strength meets 310-390 MPa, the breaking elongation is larger than or equal to 15%, and the steel belt sizing is 14 mm.
The second water-blocking tape 40 is filled between the steel belt and the inner sheath 30, the second water-blocking tape 40 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 50mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
The tearing rope 80 is made of aramid fiber, the tensile strength is more than or equal to 150N, the breaking elongation is more than or equal to 12%, the softening point is more than or equal to 238 ℃, and the melting point is more than or equal to 265 ℃.
The outer sheath 60 is made of high-density polyethylene, the wall thickness of the outer sheath 60 is nominally 2.0mm, and the overall outer diameter of the optical cable is nominally 18.6 mm.
Example 4
Referring to fig. 6, the number of cores of the optical fibers 11 is 432, 12 optical fibers 11 are arranged in each microbeam tube 10, the outer diameter of the 12 optical fibers 11 is 1.3 ± 0.1mm, the color of the 36 microbeam tubes 10 is blue, orange, green, brown, gray, white, red, black, yellow, purple, powder, cyan, blue plus 1 black ring, orange plus 1 black ring, green plus 1 black ring, brown plus 1 black ring, gray plus 1 black ring, white plus 1 black ring, red plus 1 black ring, black plus 1 white ring, yellow plus 1 black ring, purple plus 1 black ring, pink plus 1 black ring, cyan plus 1 black ring, blue plus 2 black rings, orange plus 2 black rings, green plus 2 black rings, brown plus 2 black rings, gray plus 2 black rings, white plus 2 black rings, red plus 2 black rings, black plus 2 black rings, Yellow plus 2 black rings, purple plus 2 black rings, pink plus 2 black rings, and cyan plus 2 black rings. The 36 micro-bundle tubes 10 are combined into 3 bundles by the color lines, the number of the color lines is 3, the color lines are polyester yarns, and the thickness of the color lines is 0.1 mm. The optical fiber 11 is red, blue, green, yellow, purple, white, orange, gray, brown, black, cyan and powder, the optical fiber 11 is G.657A2 optical fiber, the diameter of the colored optical fiber coating is 250 μm +/-15 μm, and the optical fiber 11 is stranded in the micro-beam tube 10 by SZ. Each micro-beam tube 10 is filled with fiber paste 12, so that water column of 1 meter and micro-beam tube of 3 meters are ensured, and water seepage does not occur within 24 hours.
The wall thickness of the microbeam tube sheath 13 is generally 0.1-0.2 mm, the microbeam tube sheath 13 is made of TPEE material, and the density is generally 1.0-1.4 g/cm3The tensile strength is usually 10-17 MPa, and the elongation at break is usually 200-250%. The microbeam tube 10 is helically S-stranded within the sheath.
The water-blocking yarn 70 has the linear density of 3000m/kg and the number of 26, the expansion rate is more than or equal to 90ml/g/min, the expansion rate is more than or equal to 110ml/g, the tensile strength is more than or equal to 100N, and the elongation at break is more than or equal to 15%.
The first water-blocking tape 20 is a double-sided water-blocking tape, the thickness of the water-blocking tape is 0.2mm, the width of the water-blocking tape is 42mm, the expansion rate is more than or equal to 10mm/min, the expansion height is more than or equal to 12mm, the tensile strength is more than or equal to 40N/cm, and the elongation at break is more than or equal to 12%.
4 non-metal reinforcements 31 are embedded in the inner sheath 30 in parallel, and the size of each non-metal reinforcement 31 is 1.4 +/-0.1 mm. The inner sheath 30 is made of high density polyethylene material, the wall thickness of the inner sheath 30 is nominally 2.6mm, and the outer diameter of the inner sheath 30 is nominally 16.8 mm. The outer portion of the inner sheath 30 is provided with a steel belt armored belt 50, the thickness of the steel belt is 0.15mm, the peeling strength is larger than or equal to 6.13N/cm, the tensile strength meets 310-390 MPa, the breaking elongation is larger than or equal to 15%, and the steel belt sizing is 18.9 mm. The second water-blocking tape 40 is filled between the steel belt and the inner sheath 30, the second water-blocking tape 40 is a double-sided water-blocking tape, the thickness of the second water-blocking tape 40 is 0.2mm, the width of the second water-blocking tape is 62mm, the expansion rate is larger than or equal to 10mm/min, the expansion height is larger than or equal to 12mm, the tensile strength is larger than or equal to 40N/cm, and the elongation at break is larger than or equal to 12%.
The tearing rope 80 is made of aramid fiber, the tensile strength is more than or equal to 150N, the breaking elongation is more than or equal to 12%, the softening point is more than or equal to 238 ℃, and the melting point is more than or equal to 265 ℃.
The outer sheath 60 is made of high-density polyethylene, the wall thickness of the outer sheath 60 is nominally 2.0mm, and the overall outer diameter of the optical cable is nominally 23.0 mm.
The optical cables produced in the examples were tested:
fiber attenuation tests for examples 1-4: 1310nm is less than or equal to 0.34dB/km, 1383nm is less than or equal to 0.25dB/km, 1550nm is less than or equal to 0.21dB/km, and 1625 is less than or equal to 0.25 dB/km;
tensile test of examples 1 to 4: under the tension of 3000N, 4000N and 6000N, the residual additional attenuation after the test is less than or equal to 0.05 dB;
side pressure test for examples 1 to 4: at a pressure value of 8000N side, the attenuation can be recovered after the test;
impact test for examples 1 to 4: impact energy is 20J, and the attenuation can be recovered after the test;
repeated bending test for examples 1 to 4: the bending radius of 300mm, the attenuation can be recovered after the test;
torsion test for examples 1 to 4: 2m of cable is long, twisted for +/-180 degrees and twisted for 5 times, and the attenuation can be recovered after the test;
high and low temperature performance tests of examples 1 to 4: the attenuation change of the optical fiber under a 1550nm window is less than or equal to 0.1dB at the temperature of between 40 ℃ below zero and 70 ℃;
bending test of examples 1 to 4: the bending diameter of 300mm does not generate bending;
water blocking test of examples 1 to 4: the optical cable has no water leakage after 1 meter of water column and 3 meters of cable length for 24 hours.
A manufacturing method of an armored micro-beam optical cable specifically comprises the following steps:
manufacturing a microbeam tube;
specifically, preparing an optical fiber pay-off rack, and performing tension adjustment test on the optical fiber pay-off rack; in one embodiment, the optical fiber pay-off rack is a 12-path optical fiber pay-off rack, and the tension of the optical fiber pay-off rack is adjusted to be 0.5N-0.8N.
Selecting a sheath material of the micro-beam tube, and setting extrusion molding temperature; in one embodiment, the temperature is controlled to be 130 ℃ to 190 ℃.
Adjusting the outer diameter of the micro-beam tube to be 1.4 +/-0.1 mm by adopting a tube extruding type die, and cooling by a cold water tank; it is understood that the outer diameter of the micro-beam tube is not limited to the above-mentioned limitations, and may be adjusted according to the number of optical fibers in the micro-beam tube.
And (4) checking the wall thickness and the outer diameter of the microbeam tube at the microbeam tube take-up stand, and feeding the microbeam tube to produce if the process requirements are met.
Manufacturing a cable core;
specifically, preparing a non-metal reinforcing piece, passing through a traction guide wheel, and drawing the non-metal reinforcing piece to a machine head for standby;
installing the micro-beam tube to a pay-off rack, adjusting the pay-off tension of the micro-beam tube to be 0.8N-1.2N, and drawing each 12 bundles to a machine head through SZ twisting equipment for later use;
and (3) aggregating the micro-beam tubes into a bundle, opening the color line machine, uniformly winding color lines with different colors around the micro-beam tubes, and simultaneously passing through the SZ strands to enter the machine head to obtain a plurality of cable cores. In one embodiment, each 12 micro-beam tubes are grouped into one bundle, the color line machine is opened, and color lines of different colors are uniformly wound around each 12 micro-beam tubes and simultaneously penetrate through the SZ strands to enter the handpiece.
Preparing an inner sheath;
in particular to a method for preparing a high-performance nano-silver alloy,
installing the water blocking yarn on a pay-off rack, adjusting the tension of the pay-off rack to be 1.5-2N, and drawing out the water blocking yarn to a machine head for later use;
installing the manufactured cable core, penetrating the cable core and the water blocking yarns into twisting equipment, installing a first water blocking tape on a water blocking tape pay-off rack, coating the twisted cable core and the water blocking yarns, and adjusting the tension of the first water blocking tape to be 2-3N; opening the extrusion molding and traction, extruding the inner sheath outside the first water-blocking tape, and drawing to a traction wheel; in one embodiment, the processing temperature of the inner sheath is 170-250 ℃.
The outer diameter, the wall thickness and the concentricity of the optical cable are checked, and the optical cable can be coiled to be produced according with requirements;
preparing an outer sheath;
specifically, the manufactured inner sheath passes through a steel belt sizing die and is pulled to a machine head for standby;
penetrating a second water blocking tape through a steel belt sizing die, adjusting the tension of the second water blocking tape to be 2-3N, and drawing the second water blocking tape to a machine head for later use;
the steel strip passes through a graining machine and a steel strip sizing die, the tension of the steel strip is adjusted to be 5-10N, and the steel strip is pulled to a machine head for standby;
opening the extrusion molding and traction equipment, and drawing to a traction wheel; in one embodiment, the processing temperature of the inner sheath is 170-250 ℃.
The outer diameter, the wall thickness and the concentricity of the optical cable are checked, and the optical cable can be coiled to be produced according with requirements;
it is understood that the tension setting of each of the above-mentioned devices is not limited to the above-mentioned limitations, and can be adjusted according to production requirements.
Embodiment 5 is a 432 core armored micro-beam optical cable manufacturing method, specifically comprising:
preparing a 12-path optical fiber pay-off rack, performing tension adjustment test on the optical fiber pay-off rack, adjusting the tension of the optical fiber pay-off rack to 0.5N-0.8N, and performing extrusion molding by selecting a mold to ensure that the outer diameter of the 12-core micro-beam tube is 1.4mm +/-0.1 mm and the wall thickness is 0.1-0.2 mm.
Installing a nonmetal reinforcing piece with nominal outer diameter of 1.4mm on a pay-off rack, and setting the pay-off tension to be 15-20N; the micro-bundle tubes penetrate through a unwinding guide wheel to a machine head, a special unwinding frame is installed on the manufactured 36 micro-bundle tubes, the unwinding tension is adjusted to be 1-1.5N, and the micro-bundle tubes are pulled out and penetrate through SZ twisting equipment to the machine head for standby; and (3) aggregating every 12 micro-beam tubes into one beam, opening the color yarn machine, uniformly winding color yarns with different colors around every 12 micro-beam tubes, and simultaneously passing through SZ twisting equipment to enter a machine head to obtain 3 cable cores.
Installing 26 3000D water-blocking yarns to a water-blocking yarn pay-off rack, and adjusting the tension of the water-blocking yarns to be 2-3N; after the water blocking yarn and the cable core penetrate into SZ twisting equipment, mounting a first water blocking tape on a water blocking tape pay-off rack, coating the twisted water blocking yarn and cable core with the first water blocking tape, and adjusting the tension of the water blocking tape to be 2-3N; opening a plastic extruding machine, extruding a layer of polyethylene inner sheath outside the first water-blocking tape, coating a nonmetal reinforcing piece in the inner sheath, and drawing the nonmetal reinforcing piece to a traction wheel through a 40 ℃ warm water tank and a room temperature cold water tank; the outer diameter was examined at 16.8. + -. 0.84mm, with a nominal wall thickness of 2.6 mm.
The steel strip passes through a rolling mill, a steel strip sizing die and a machine head, and the tension of the steel strip is adjusted to be 5-10N; opening the plastic extruding machine and the traction equipment; penetrating the second water blocking tape through a steel belt sizing die, and adjusting the tension of the water blocking tape to be 2-3N; the prepared inner sheath passes through a steel belt sizing die with the diameter of 18.9mm, passes through a machine head along with a steel belt and a second water-blocking belt, is cooled through a warm water tank with the temperature of 40 ℃ and a cold water tank with the temperature of normal temperature, and is drawn to a traction wheel; the cable was examined for an outer diameter of 23mm and a wall thickness of nominally 2.0 mm.
It is understood that the above manufacturing method is not limited to manufacturing 432 cores of armored micro-beam cables, but 72 cores, 144 cores, 288 cores, 528 cores, 600 cores, etc. can be manufactured, and may be modified according to the requirement.
The armored microbeam optical cable is suitable for pipeline installation, adopts an armored belt to protect the internal structure of the optical cable, can be used for direct-buried construction in an extreme geographical environment, reduces the construction cost, has the performances of stretch resistance, side pressure resistance and impact resistance, can meet the requirement of attenuation change under the temperature change of-40 ℃ to +70 ℃, and can ensure the dryness of optical units in the optical cable and signal transmission under the high-humidity environment due to the inner and outer double-layer water-blocking materials.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications of the above embodiments are within the scope of the disclosure claimed in the present application as long as they are within the spirit and scope of the present application.
Claims (10)
1. The utility model provides an armor microbeam optical cable, includes the microbeam pipe and strand in the yarn that blocks water of microbeam pipe, its characterized in that: the armored micro-bundle optical cable further comprises a water-blocking tape, an inner sheath, an armored tape and an outer sheath, wherein the water-blocking tape, the inner sheath, the armored tape and the outer sheath are coated outside the micro-bundle tubes and the water-blocking yarns, the water-blocking tape comprises a first water-blocking tape and a second water-blocking tape, the first water-blocking tape is arranged between the micro-bundle tubes and the inner sheath, and the second water-blocking tape is arranged between the inner sheath and the armored tape.
2. The armored microbeam cable of claim 1, wherein: the armor belt comprises a steel belt or an aluminum belt, and the sizing D of the armor belt3＝D4+M2×2+M3×2+K1Wherein D is4Is the outer diameter of the inner sheath, M2Thickness of the armor tape, M3Thickness of the water-blocking tape, K1The correction coefficient is 1 to 1.5 mm.
3. The armored microbeam cable of claim 1, wherein: the armored micro-beam optical cable further comprises a color line, wherein the color line is used for combining a plurality of micro-beam tubes into one beam, each beam is distinguished by the color lines with different colors, the thickness of the color line is 0.1-0.2 mm, and the equivalent width of the color line is 0.1-2 mm.
4. The armored microbeam cable of claim 3, wherein: the inner cavity radius of the inner sheath is as follows:
wherein M is1Is the thickness of the color line, N1Number of color lines, N2For equivalent number of water-blocking yarns, N3Number of micro-beam tubes, D2The diameter of the micro-beam tube is the outer diameter of the micro-beam tube, K is a correction coefficient, and the value of K is 0.5-1.5 mm.
5. The armored microbeam cable of claim 1, wherein: the armored micro-beam optical cable further comprises a tearing rope, and the tearing rope is arranged in the second water-blocking tape or the outer sheath.
6. The armored microbeam cable of claim 1, wherein: the armored micro-beam optical cable further comprises a non-metal reinforcement, and the non-metal reinforcement is embedded in the inner sheath.
7. The armored microbeam cable of claim 1, wherein: the material of the microbeam tube jacket comprises one or more of low-smoke halogen-free flame-retardant polyolefin material, polyvinyl chloride and thermoplastic polyester elastomer.
8. The armored microbeam cable of claim 1, wherein: the micro-beam tube comprises an optical fiber, fiber paste and a micro-beam tube sheath, wherein the optical fiber is arranged in the micro-beam tube sheath, and the fiber paste is filled between the micro-beam tube sheath and the optical fiber.
9. The armored microbeam cable of claim 8, wherein: the optical fiber is SZ twisted or S twisted in the micro-beam tube sheath, and the wall thickness of the micro-beam tube sheath is 0.1-0.2 mm.
10. A method of making an armored micro-beam cable as claimed in any one of claims 1 to 9, comprising the steps of:
setting extrusion molding temperature, and extruding a micro-beam tube outside the optical fiber;
stranding a plurality of micro-beam tubes into a plurality of bundles, wherein each bundle is used as a cable core and carries out color line marking to obtain a plurality of marked cable cores;
twisting the water-blocking yarn and the plurality of cable cores, coating a first water-blocking tape on the twisted water-blocking yarn and the twisted cable cores, and extruding an inner sheath outside the first water-blocking tape;
and coating the second water-blocking tape on the inner jacket, coating the armor tape on the second water-blocking tape, extruding the outer jacket on the armor tape, and cooling to obtain the armored micro-beam optical cable.
Priority Applications (2)
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| CN202010443786.XA CN111562657A (en) | 2020-05-22 | 2020-05-22 | Armored micro-beam optical cable and manufacturing method thereof |
| PCT/CN2020/115131 WO2021232630A1 (en) | 2020-05-22 | 2020-09-14 | Armored micro optical cable and manufacturing method |
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| CN202010443786.XA CN111562657A (en) | 2020-05-22 | 2020-05-22 | Armored micro-beam optical cable and manufacturing method thereof |
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| WO2021232630A1 (en) * | 2020-05-22 | 2021-11-25 | 江苏中天科技股份有限公司 | Armored micro optical cable and manufacturing method |
| CN115343817A (en) * | 2022-08-30 | 2022-11-15 | 江苏中天科技股份有限公司 | Rated breaking force overhead micro-beam optical cable and manufacturing process thereof |
| CN116184597A (en) * | 2023-04-19 | 2023-05-30 | 江苏中天科技股份有限公司 | Microbeam cable with netlike microbeam tube and manufacturing process thereof |
| CN116609906A (en) * | 2023-07-18 | 2023-08-18 | 江苏中天科技股份有限公司 | Unidirectional stranded microbeam optical cable and manufacturing process thereof |
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| CN115248486B (en) * | 2022-09-22 | 2023-01-10 | 深圳市特发信息股份有限公司 | Optical cable with loose tube optical unit |
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| WO2021232630A1 (en) | 2021-11-25 |
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Application publication date: 20200821 |