WO2017219647A1 - 全干式抗弯曲管道输出光缆及其制作方法 - Google Patents

全干式抗弯曲管道输出光缆及其制作方法 Download PDF

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Publication number
WO2017219647A1
WO2017219647A1 PCT/CN2016/113711 CN2016113711W WO2017219647A1 WO 2017219647 A1 WO2017219647 A1 WO 2017219647A1 CN 2016113711 W CN2016113711 W CN 2016113711W WO 2017219647 A1 WO2017219647 A1 WO 2017219647A1
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water blocking
layer
blocking layer
aramid
full
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PCT/CN2016/113711
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English (en)
French (fr)
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汪趁时
周华
缪威玮
尤徐
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江苏中天科技股份有限公司
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Priority to EP16906184.3A priority Critical patent/EP3447557A4/en
Publication of WO2017219647A1 publication Critical patent/WO2017219647A1/zh

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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
    • G02B6/4401—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
    • G02B6/4401—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
    • 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

Definitions

  • the invention relates to a full-dry anti-bending pipeline output optical cable, which is applied to an outdoor introduction room in an access network or a customer premises network, and an indoor or outdoor overhead introduction and pipeline introduction of a building in integrated wiring.
  • the traditional pipe output cable also known as the pipe-introduction cable
  • the traditional pipe output cable is based on the cable of the cable, plus steel wire and other reinforcing members, with a layer of water-blocking tape wrapped around, and some embossed steel tape. Installed.
  • the structure has high tensile strength and lateral compressive strength, the water blocking effect is not obvious due to the large internal space of the optical cable, and the anti-electromagnetic interference capability is weak due to the steel wire reinforcement.
  • the cable structure is redesigned from the structure of the unit cable and the modification of the reinforcing member, so that the pipeline output cable can meet the higher use requirements.
  • the embodiment of the invention provides a full-dry anti-bending pipeline output optical cable, which has the characteristics of high mechanical strength, good flexibility, comprehensive water blocking, and the like, and the optical cable can also be independently wired, and can be used for fiber joints and prefabricated ends. Used as a jumper.
  • the embodiment of the invention provides a method for manufacturing a full-dry anti-bending pipeline output optical cable, by which the internal gap of the pipeline output cable can be significantly reduced, the water blocking performance is improved, and the tensile, anti-shrinking and anti-bending properties are enhanced.
  • the utility model relates to a full-dry anti-bending pipeline output optical cable, which comprises an optical fiber unit, a tight sleeve layer, a reinforcing water blocking layer I formed by twisting a high modulus water-resistance aramid, an inner sheath and an outer sheath covering the inner sheath Strengthening the water blocking layer II and the outer sheathing layer, wherein the reinforcing water blocking layer I is provided with a tearing cord I made of the tying yarn, and the reinforcing water blocking layer I is disposed between the tight layer and the inner sheathing layer.
  • the reinforcing water blocking layer II is formed by twisting a high modulus aramid and a water blocking yarn at a pitch of 800-1000 mm, and the reinforcing water blocking layer II is provided with a tearing cord II made of a woven yarn.
  • a full-dry anti-bending pipeline output optical cable comprising: a fiber unit, a tight sleeve layer, a reinforcing water blocking layer I formed by twisting a high modulus water-resistance aramid, an inner sheath, and a coating
  • the reinforcing water blocking layer II and the outer protective layer outside the sheath are formed by twisting the high modulus aramid and the water blocking yarn at a pitch of 800-1000 mm.
  • the reinforcing water blocking layer I is disposed between the tight layer and the inner sheath, and is provided with a tearing cord I made of a tying yarn, a polyester yarn or an aramid tearing rope.
  • the reinforcing water blocking layer II is provided with a tearing cord II made of a tying yarn, a polyester yarn or an aramid tearing rope.
  • the reinforcing water blocking layer II is disposed between the inner sheath and the outer sheath.
  • the full dry anti-bending pipe output cable has a circular cross section.
  • the inner sheath material is a low-smoke, halogen-free flame-retardant material, and has a light density transmittance of >60% and a temperature index of >280 ° C by a single vertical burning.
  • the outer sheath material is a polyethylene material, the material density is less than 0.94 g/cm 3 when carbon black is not added, and the shrinkage rate at 100 ° C is ⁇ 2%.
  • a method for manufacturing a full-dry anti-bending pipeline output optical cable comprising:
  • the prepared fiber optic pay-off rack is subjected to tension adjustment test, the tension is adjusted to 0.8N-1N, and then extruded with a mold, and the outer diameter is adjusted to 0.8 ⁇ 0.05 mm, and the vacuum degree is adjusted to make the coating layer peeling control.
  • tension adjustment test the tension is adjusted to 0.8N-1N, and then extruded with a mold, and the outer diameter is adjusted to 0.8 ⁇ 0.05 mm, and the vacuum degree is adjusted to make the coating layer peeling control.
  • the water-blocking layer I is made of a high-modulus water-blocking aramid as a water-blocking material, and a woven yarn or aramid tearing rope is used as a tearing rope, and the aramid pay-off frame is laid in a straight form;
  • a tight-fitting fiber optic pay-off stand to perform the pay-off of the tight-fitting fiber made in step a, tightly sheathing the fiber
  • the tension of the pay-off frame is 3.0-5.0N
  • the extrusion temperature of the inner sheath is set, the temperature is controlled at 130-170 ° C
  • the inner sheath material is extruded outside the tight-fitting fiber by a squeeze or extruded tube mold, and then The hot water tank and the cold water tank are cooled twice, and then the upper disc is pulled by the traction wheel to make a unit cable;
  • the water-blocking layer II is made of high modulus aramid and water-blocking yarn, and the ties, polyester yarn or aramid tearing rope is used as the tearing rope, and the aramid pay-off frame is adjusted to maintain the aramid and water-blocking yarn.
  • the tension of the wire is close, the deviation is not more than 0.5%, the pitch of the aramid and water-blocking yarn is 800-1000mm, and the twisting method is S-swing; the skein, polyester yarn, or aramid tearing rope is placed in the aramid One side, keep it straight;
  • the outer sheath material is extruded by using an extrusion die to form an outer sheath, which is cooled twice by a hot water tank and a cold water tank, and then pulled by a traction wheel.
  • the disc is made into a full dry anti-bending pipe output cable.
  • the aramid pay-off frame has a tension of 1-1.5 N or 5-6 N.
  • the extrusion or extruded tube mold is adjusted so that the outer diameter is 3.0 ⁇ 0.1 mm, the wall thickness is ⁇ 0.4 mm, and the extrusion speed is 25-30 r/min.
  • the tension of the tight-fitting fiber optic pay-off rack is 4-5N.
  • the inner sheath material adopts a low-smoke halogen-free flame-retardant sheath material; in step c, the temperature of the hot water tank is controlled at 20-30 ° C or 40-50 ° C, and the temperature of the cold water tank is controlled at 15-20 ° C; the tension of the traction wheel is 10-20N.
  • the tension of the aramid pay-off frame is 1-1.5 N or 5-6 N; the tension of the tying yarn, the polyester yarn or the aramid tearing rope is consistent with the tension of the aramid pay-off frame.
  • the outer sheath has an overall outer diameter of 5.0 ⁇ 0.1 mm and a wall thickness of ⁇ 0.4 mm.
  • the extrusion temperature is 170-220 ° C
  • the extrusion speed is 10-20 r/min
  • the line tension of the unit cable is 15-20 N
  • the hot water bath temperature is 45-60 ° C
  • the cold water bath temperature At 19-25 ° C.
  • the tension of the traction wheel in step e is 30-40N.
  • the fiber length is -8 ⁇ to -10 ⁇ .
  • the fiber length is -3 ⁇ to -5 ⁇ .
  • the whole adopts a circular structure, two inner and outer sheath layers, the inner sheath has high flame retardant and low smoke generating effect, and the outer sheath has anti-stretching, anti-shrinking and anti-bending properties.
  • the outer diameter is smaller and the pipe space can be saved.
  • the inner and outer two layers are used to strengthen the water blocking layer I.
  • the high modulus water blocking aramid is used as the water blocking material.
  • the tying yarn, the polyester yarn or the aramid tearing rope is used as the tearing rope, and the reinforcing water blocking layer II is formed by twisting the high modulus aramid and the water blocking yarn at a pitch of 800-1000 mm, and the double layer structure design Improve overall water blocking performance. It adopts all-dry structure, no grease filling, and the construction is more convenient; it adopts all-media reinforcement parts, no metal reinforcement parts and steel and aluminum belt armor, which is effective for lightning protection and electric power, and is also suitable for medium-short span high-altitude erection; The long process is effective against the shrinkage of the outer sheath. In addition, through the unique process, the internal clearance of the pipeline output cable is reduced, the water blocking performance is further improved, and the tensile, anti-shrinking and anti-bending properties are enhanced.
  • FIG. 1 is a schematic structural view of an all-drying anti-bending pipeline output optical cable according to an embodiment of the present invention.
  • a full dry anti-bending pipeline output optical cable comprises a fiber unit 3 , a tight layer 4 , a reinforcing water blocking layer I5 formed by twisting a high modulus water blocking aramid, and an inner sheath.
  • the reinforcing water blocking layer II6 and the outer sheathing layer 7 coated on the outer protective layer 8 are provided with a tearing cord I1 made of the tying yarn in the reinforcing water blocking layer I5, and the reinforcing water blocking layer I5 is tightly arranged.
  • the reinforcing water blocking layer II6 is formed by twisting a high modulus aramid and a water blocking yarn at a pitch of 800-1000 mm, and a reinforcing yarn is provided in the reinforcing water blocking layer II6.
  • the tear cord I1 and the tear cord II2 may also be made of other polyester yarns or aramid tear cords.
  • the specific manufacturing method of the full dry anti-bending pipeline output optical cable includes:
  • the prepared fiber optic pay-off rack is subjected to tension adjustment test, the tension is adjusted to 0.8N-1N, and then the mold is used for extrusion molding, and the outer diameter is adjusted to 0.8 ⁇ 0.05 mm, and the vacuum degree is adjusted to make the coating layer peeling control.
  • tension adjustment test the tension is adjusted to 0.8N-1N
  • the mold is used for extrusion molding
  • the outer diameter is adjusted to 0.8 ⁇ 0.05 mm
  • the vacuum degree is adjusted to make the coating layer peeling control.
  • step a Use the tight-fitting fiber optic pay-off rack to pay the tight-fitting optical fiber made in step a, adjust the tension of the tight-fitting fiber optic pay-off frame, adjust the tension to 3.0-5.0N, set the inner sheath extrusion temperature, and control the temperature.
  • the extrusion die is used, the extrusion speed is 25-30r/min, the outer diameter is adjusted to 3.0 ⁇ 0.1mm, the wall thickness is ⁇ 0.4mm, and the inner sheathing material is extruded outside the tight fiber.
  • Layer mining Use low-smoke, halogen-free flame-retardant sheath material, and then cool twice through hot water tank and cold water tank. The temperature of hot water tank is controlled at 20-30 °C, and the temperature of cold water tank is controlled at 15-20 °C. ;
  • the water-blocking layer II is made of high modulus aramid and water-blocking yarn, and the yarn is used as a tearing rope.
  • the tension of the aramid pay-off frame is adjusted to 1-1.5N, and the tension of the aramid and water-blocking yarn is kept close. , the deviation is not more than 0.5%, the aramid and water-blocking yarn stranding pitch is 800-1000mm, and the twisting method adopts S twisting; the tying yarn is placed on one side of the aramid, which is kept straight and easy to tear; And the water-blocking yarn is pulled to the machine head for use, and after the traction speed is started to be smooth, the yarn is brought into the machine head, and the twisting speed is adjusted so that the twisting pitch is within the range;
  • the diameter of the outer sheath is designed as the overall outer diameter of 5.0 ⁇ 0.1mm, the wall thickness is ⁇ 0.4mm, the appropriate extrusion die is selected according to the outer diameter, the mold is installed, the extrusion temperature is controlled at 170-220°C, and the extrusion speed is 10 -20r/min, the outer diameter and the concentricity are adjusted well.
  • the unit cable obtained in step d is coated with the water blocking layer II, and then the polyethylene outer sheath material is extruded to form an outer sheath, which is heated and cooled.
  • the water tank is cooled twice, the temperature of the hot water tank is controlled at 45-60 ° C, the temperature of the cold water tank is controlled at 19-25 ° C, and the upper plate is pulled to make a full dry anti-bending pipeline output optical cable.
  • the tension of the aramid pay-off frame can also be 5-6N; in step c, the tight-fitting fiber optic pay-off frame
  • the tension of the take-up line can be 4-5N, the temperature of the hot water tank can be set to 40-50 °C, the tension of the traction wheel can be set to 10-20N; in step d, the tension of the aramid pay-off frame can be 5-6N, the tension of the tie yarn It can be adjusted to 5-6N, which is consistent with the tension of the aramid pay-off line; in step e, the tension of the unit cable is 15-20N, and the tension of the traction wheel is set at 30-40N.
  • the tearing cord I1 and the tear cord II2 can also be made of other polyester yarn or aramid tearing rope; in step c, a squeeze tube can also be used. The mold is extruded. In step d, the ties or other polyester yarns and aramid tearing cords are placed on one side of the aramid and kept straight for easy tearing.
  • the whole adopts a circular structure, two inner and outer sheath layers, the inner sheath has high flame retardant and low smoke generating effect, meets the temperature index of 280 ° C, and the outer sheath has tensile and compressive resistance.
  • the overall outer diameter is more than the outer diameter of the commonly used pipe leather cable Small, more energy-saving pipe space; two layers of inner and outer reinforcement layer, enhanced water-blocking layer I using high modulus water-blocking aramid as water-blocking material, using ties, or other polyester yarn or aramid tearing rope as tearing
  • the split rope and the enhanced water-blocking layer II are made of high-modulus aramid and water-blocking yarn at a pitch of 800-1000mm.
  • the double-layer structure design improves the overall water-blocking performance.
  • this embodiment means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment of the invention or In the example.
  • the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Ropes Or Cables (AREA)

Abstract

一种全干式抗弯曲管道输出光缆及其制作方法，全干式抗弯曲管道输出光缆包括光纤单元（3）、紧套层（4）、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ（5）、内护层（8）、包覆在内护层（8）外的加强阻水层Ⅱ（6）以及外护层（7），加强阻水层Ⅰ（5）内设置有由扎纱、其他聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅰ（1），加强阻水层Ⅰ（5）设置在紧套层（4）与内护层（8）之间，加强阻水层Ⅱ（6）由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，加强阻水层Ⅱ（6）内设置有由扎纱、其他聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅱ（2）。该光缆整体采用圆形结构，内外两层护套层，内护层（8）具有高阻燃及低发烟量效果，满足280℃温度指数，外护层（7）具有抗拉伸、抗压扁、抗弯曲特点；采用内外双层结构设计，提高全面阻水性能。

Description

全干式抗弯曲管道输出光缆及其制作方法 技术领域
本发明涉及一种全干式抗弯曲管道输出光缆，应用于接入网或用户驻地网中室外引入室内，综合布线中建筑物室内或室外架空引入及管道引入。
背景技术
随着我国城市化进程的加快，城市住户密集，而相对的塔杆空间不足，一般是在城市地区，管道的敷设应用较多，敷设环境比室外布线要好，无需经受严寒酷暑的考验。但是，考虑到管道输出光缆的特殊使用环境，其必须具备较强的抗拉强度、抗侧压力、抗弯曲能力、阻水性能等，以满足光缆施工敷设和后期正常运行要求。
传统的管道输出光缆，亦可称为管道引入光缆，是在皮线光缆的基础上，加上钢丝等加强件，外面加上一层阻水带绕包，有的还有轧纹钢带铠装。此结构虽然抗拉伸及侧压强度高，但是由于光缆内部空隙较大，阻水效果不明显，且由于有钢丝加强件，抗电磁干扰能力弱。考虑到管道引入光缆的结构缺点，从单元缆的结构、加强件的更改，重新设计光缆结构，以使管道输出缆满足更高的使用需求。
发明内容
本发明实施例提供一种全干式抗弯曲管道输出光缆，该光缆具有机械强度高、柔性好、全面阻水等特点，另外该光缆还可以独立布线，可以进行光纤接头，预制成端，作为跳线使用。
本发明实施例提供全干式抗弯曲管道输出光缆的制作方法，通过该方法可明显减小管道输出光缆内部间隙，提高阻水性能，增强抗拉伸、抗压扁、抗弯曲等性能。
本发明采用的技术方案是：
一种全干式抗弯曲管道输出光缆，包括光纤单元、紧套层、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ、内护层、包覆在内护层外的加强阻水层Ⅱ以及外护层，所述加强阻水层Ⅰ内设置有由扎纱制成的撕裂绳Ⅰ，所述加强阻水层Ⅰ设置在紧套层与内护层之间，所述加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，所述加强阻水层Ⅱ内设置有由扎纱制成的撕裂绳Ⅱ。
一种全干式抗弯曲管道输出光缆，其特征在于：包括光纤单元、紧套层、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ、内护层、包覆在内护层外的加强阻水层Ⅱ以及外护层，所述加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成。
进一步的，所述加强阻水层Ⅰ设置在紧套层与内护层之间，其内设置有由扎纱、聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅰ。
进一步的，所述加强阻水层Ⅱ内设置有由扎纱、聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅱ。
进一步的，所述加强阻水层Ⅱ设置于内护层及外护层之间。
进一步的，全干式抗弯曲管道输出光缆的横截面为圆形。
进一步的，内护层材料为低烟无卤阻燃材料，通过单根垂直燃烧，烟密度透光率＞60％，温度指数＞280℃。
进一步的，外护层材料为聚乙烯材料，不添加炭黑时材料密度＜0.94g/cm3，100℃收缩率＜2％。
一种全干式抗弯曲管道输出光缆的制作方法，包括：
a、紧套层的制作
将准备好的光纤放线架进行张力调节测试，张力调节为0.8N-1N，然后用并带模具进行挤塑，并调节外径调至0.8±0.05mm，调节真空度，使得被覆层剥离控制在5.0-7.0N；
b、加强阻水层Ⅰ的制作
加强阻水层Ⅰ采用高模量阻水芳纶作为阻水材料，采用扎纱聚酯纱或芳纶撕裂绳作为撕裂绳，芳纶放线架采用直放的形式放线；
c、内护层的制作
利用紧套光纤放线架对a步骤中制成的紧套光纤进行放线，紧套光纤 放线架的张力为3.0-5.0N，设置内护层挤塑温度，温度控制在130-170℃，采用挤压式或挤管式模具在紧套光纤外挤塑内护层料，然后经热水槽、冷水槽两次冷却，再经牵引轮牵引上盘，制成单元缆；
d、加强阻水层Ⅱ的制作
加强阻水层Ⅱ采用高模量芳纶和阻水纱为材料，扎纱、聚酯纱或芳纶撕裂绳作为撕裂绳，调节芳纶放线架保持芳纶与阻水纱的放线张力接近，偏差不超过0.5％，芳纶和阻水纱绞合节距为800-1000mm，绞合方式采用S绞；扎纱、聚酯纱、或芳纶撕裂绳置于芳纶的一侧，保持直放；
e、外护层的制作
在c步骤中得到的单元缆外包覆加强阻水层Ⅱ后使用挤塑模具挤塑外护层料，形成外护层，再经热水槽、冷水槽两次冷却，再经牵引轮牵引上盘，制成全干式抗弯曲管道输出光缆。
进一步的，b步骤中，所述芳纶放线架张力为1-1.5N或为5-6N。
进一步的，c步骤中，调节挤压式或挤管式模具使外径在3.0±0.1mm，壁厚≥0.4mm，挤塑速度为25-30r/min。
进一步的，所述紧套光纤放线架的张力为4-5N。
进一步的，内护层料采用低烟无卤阻燃护套料；步骤c中热水槽温度控制在20-30℃或40-50℃，冷水槽温度控制在15-20℃；牵引轮张力为10-20N。
进一步的，步骤d中芳纶放线架放线张力为1-1.5N或为5-6N；扎纱、聚酯纱或芳纶撕裂绳张力与芳纶放线架放线张力一致。
进一步的，所述外护层的整体外径为5.0±0.1mm，壁厚≥0.4mm。
进一步的，步骤e中挤塑温度在170-220℃，挤塑速度为10-20r/min，所述单元缆的放线张力为15-20N，热水槽温度在45-60℃，冷水槽温度在19-25℃。
进一步的，步骤e中牵引轮张力为30-40N。
进一步的，c步骤中，光纤余长为-8‰～-10‰。
进一步的，e步骤中，光纤余长为-3‰～-5‰。
本发明实施例的优点：整体采用圆形结构，内外两层护套层，内护层具有高阻燃及低发烟量效果，外护层具有抗拉伸、抗压扁、抗弯曲特 点；整体外径比常用的管道皮线缆相比，外径更小，更能节约管道空间；采用内外两层加强层，加强阻水层Ⅰ采用高模量阻水芳纶作为阻水材料，采用扎纱、聚酯纱或芳纶撕裂绳作为撕裂绳，加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，双层结构设计，提高全面阻水性能。采用全干式结构，无油膏填充，施工更加便利；采用全介质加强件，无金属加强件及钢铝带铠装，有效防雷防电，也适合中短跨距高空架设；采用光纤负余长工艺，有效抵抗外护套收缩。另外，经过独特的工艺制作，减小了管道输出光缆内部间隙，进一步提高了阻水性能，和增强了抗拉伸、抗压扁、抗弯曲等性能。
附图说明
附图中：
图1为本发明实施例全干式抗弯曲管道输出光缆的结构示意图。
主要元件符号说明
撕裂绳Ⅰ 1
撕裂绳Ⅱ 2
光纤单元 3
紧套层 4
加强阻水层Ⅰ 5
第二阻水层Ⅱ 6
外护层 7
内护层 8
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实 施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。可以理解，附图仅提供参考与说明用，并非用来对本发明加以限制。附图中显示的尺寸仅仅是为便于清晰描述，而并不限定比例关系。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。
如图1所示，一种全干式抗弯曲管道输出光缆，其包括光纤单元3、紧套层4、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ5、内护层8、包覆在内护层8外的加强阻水层Ⅱ6、外护层7，在加强阻水层Ⅰ5内设置有由扎纱制成的撕裂绳Ⅰ1，加强阻水层Ⅰ5设置在紧套层4与内护层8之间，加强阻水层Ⅱ6由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，在加强阻水层Ⅱ6内设置有由扎纱制成的撕裂绳Ⅱ2。
本领域技术人员可以理解，其他实施方式中，所述撕裂绳Ⅰ1及撕裂绳Ⅱ2还可以由其他聚酯纱或芳纶撕裂绳制成。
所述的全干式抗弯曲管道输出光缆的具体制作方法，包括：
a、紧套层的制作
将准备好的光纤放线架进行张力调节测试，张力调节为0.8N-1N，然后选用并带模具进行挤塑，并调节外径调至0.8±0.05mm，调节真空度，使得被覆层剥离控制在5.0-7.0N；
b、加强阻水层Ⅰ的制作
加强阻水层Ⅰ采用高模量阻水芳纶作为阻水材料，采用扎纱作为撕裂绳，调节芳纶放线架张力为1-1.5N；
c、内护层的制作
利用紧套光纤放线架对a步骤中制成的紧套光纤进行放线，并调节紧套光纤放线架的张力，调节张力至3.0-5.0N，设置内护层挤塑温度，温度控制在130-170℃，采用挤压式模具，挤塑速度为25-30r/min，调节外径在3.0±0.1mm，壁厚≥0.4mm在紧套光纤外挤塑内护层料，内护层料采 用低烟无卤阻燃护套料，然后经热水槽、冷水槽两次冷却，热水槽温度控制在20-30℃，冷水槽温度控制在15-20℃经牵引上盘，制成单元缆；
d、加强阻水层Ⅱ的制作
加强阻水层Ⅱ采用高模量芳纶和阻水纱为材料，扎纱作为撕裂绳，调节芳纶放线架张力为1-1.5N，保持芳纶与阻水纱的放线张力接近，偏差不超过0.5％，芳纶和阻水纱绞合节距为800-1000mm，绞合方式采用S绞；扎纱置于芳纶的一侧，保持直放，方便撕裂；将芳纶与阻水纱牵引至机头待用，待牵引速度开启平稳后，再将扎纱带入机头，调节绞合速度使绞合节距在范围内；
e、外护层的制作
外护层的直径设计为整体外径5.0±0.1mm，壁厚≥0.4mm，根据外径选择合适挤塑模具，安装好模具，将挤塑温度控制在170-220℃，挤塑速度为10-20r/min，将外径和同心度调节好，在d步骤中得到的单元缆外包覆了阻水层Ⅱ后挤塑聚乙烯外护层料，形成外护层，经热水槽、冷水槽两次冷却，热水槽温度控制在45-60℃，冷水槽温度控制在19-25℃，经牵引上盘，制成全干式抗弯曲管道输出光缆。
以上实施例中的各参数，特别是数值参数，只为进一步说明本发明，并不对其范围进行限制。另外，在实际应用中也可根据实际情况，对这些参数相应调整，如：步骤b中，所述芳纶放线架张力还可为5-6N；步骤c中，紧套光纤放线架的放线张力可以为4-5N，热水槽温度可以设定为40-50℃，牵引轮张力可以设置成10-20N；步骤d中，芳纶放线架张力可以为5-6N，扎纱张力可以调整成5-6N，与芳纶放线架放线张力一致；步骤e中，单元缆放线张力为15-20N,牵引轮张力设置在30-40N等。本领域技术人员还可以理解，其他实施方式中，所述撕裂绳Ⅰ1及撕裂绳Ⅱ2还可以由其他聚酯纱或芳纶撕裂绳制成；步骤c中，还可以采用挤管式模具进行挤塑。步骤d中，扎纱或其他聚酯纱、芳纶撕裂绳置于芳纶的一侧，保持直放，方便撕裂。
本发明实施例的优点：整体采用圆形结构，内外两层护套层，内护层具有高阻燃及低发烟量效果，满足280℃温度指数，外护层具有抗拉伸、抗压扁、抗弯曲特点；整体外径比常用的管道皮线缆相比，外径更 小，更能节约管道空间；采用内外两层加强层，加强阻水层Ⅰ采用高模量阻水芳纶作为阻水材料，采用扎纱、或其他聚酯纱或芳纶撕裂绳作为撕裂绳，加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，双层结构设计，提高全面阻水性能。采用全干式结构，无油膏填充，施工更加便利；采用全介质加强件，无金属加强件及钢铝带铠装，有效防雷防电，也适合中短跨距高空架设；采用光纤负余长工艺，有效抵抗外护套收缩。另外，经过独特的工艺制作，减小了管道输出光缆内部间隙，进一步提高了阻水性能，和增强了抗拉伸、抗压扁、抗弯曲等性能。
在本说明书的描述中，术语“本实施方式”、“其他实施方式”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种全干式抗弯曲管道输出光缆，其特征在于：包括光纤单元、紧套层、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ、内护层、包覆在内护层外的加强阻水层Ⅱ以及外护层，所述加强阻水层Ⅰ内设置有由扎纱制成的撕裂绳Ⅰ，所述加强阻水层Ⅰ设置在紧套层与内护层之间，所述加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成，所述加强阻水层Ⅱ内设置有由扎纱制成的撕裂绳Ⅱ。
  2. 一种全干式抗弯曲管道输出光缆，其特征在于：包括光纤单元、紧套层、由高模量阻水芳纶绞合而成的加强阻水层Ⅰ、内护层、包覆在内护层外的加强阻水层Ⅱ以及外护层，所述加强阻水层Ⅱ由高模量芳纶和阻水纱按800-1000mm的节距绞合而成。
  3. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：所述加强阻水层Ⅰ设置在紧套层与内护层之间，其内设置有由扎纱、聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅰ。
  4. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：所述加强阻水层Ⅱ内设置有由扎纱、聚酯纱或芳纶撕裂绳制成的撕裂绳Ⅱ。
  5. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：所述加强阻水层Ⅱ设置于内护层及外护层之间。
  6. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：全干式抗弯曲管道输出光缆的横截面为圆形。
  7. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：内护层材料为低烟无卤阻燃材料，通过单根垂直燃烧，烟密度透光率＞60％，温度指数＞280℃。
  8. 根据权利要求2所述的全干式抗弯曲管道输出光缆，其特征在于：外护层材料为聚乙烯材料，不添加炭黑时材料密度＜0.94g/cm3，100℃收缩率＜2％。
  9. 一种全干式抗弯曲管道输出光缆的制作方法，其特征在于：所述制作方法包括：
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