WO2022179200A1 - 一种非金属防蚁架空管道引入光缆 - Google Patents
一种非金属防蚁架空管道引入光缆 Download PDFInfo
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- WO2022179200A1 WO2022179200A1 PCT/CN2021/131355 CN2021131355W WO2022179200A1 WO 2022179200 A1 WO2022179200 A1 WO 2022179200A1 CN 2021131355 W CN2021131355 W CN 2021131355W WO 2022179200 A1 WO2022179200 A1 WO 2022179200A1
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- protective layer
- optical fiber
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- 150000002843 nonmetals Chemical class 0.000 title 1
- 239000011241 protective layer Substances 0.000 claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000004677 Nylon Substances 0.000 claims abstract description 16
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- 239000003365 glass fiber Substances 0.000 claims description 7
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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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
- G02B6/4432—Protective covering with fibre reinforcements
- G02B6/4433—Double reinforcement laying in straight line with optical transmission element
-
- 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
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4422—Heterogeneous cables of the overhead type
-
- 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
- G02B6/4436—Heat resistant
Definitions
- the present invention relates to the technical field of optical cables, in particular to a non-metal ant-proof overhead pipe lead-in optical cable.
- Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications, and are telecommunication cable assemblies that utilize one or more optical fibers in a sheathing as the transmission medium and can be used individually or in groups.
- Multi-core bundle optical cable is a kind of optical cable, as shown in Figure 1.
- the optical fiber cable can not meet various complex working environments at this stage, and can only meet the working environment of -40 ° C ⁇ 75 ° C at most, so that its function is limited, the use is single, and it can only be used for indoor integrated wiring.
- the purpose of the present invention is to provide a non-metal ant-proof overhead pipe lead-in optical cable, so as to realize the multi-purpose of one cable.
- the present invention adopts the following technical solutions:
- a non-metal ant-proof overhead pipe lead-in optical cable comprising a first sheath and at least one optical fiber unit, wherein a tensile strength member is embedded in the body of the first sheath; all optical fiber units included in the lead-in cable are located in the In the first sheath, the optical fiber unit includes an optical fiber body and a tight-fitting layer covering the optical fiber body, and the tight-fitting layer is a nylon tight-fitting layer; the gap between the optical fiber unit and the first sheath is The gap is filled with a water blocker. That is, the structure disclosed in the present invention can be applied not only to multi-core bundled optical cables, but also to single-core optical cables.
- the material of the nylon tight sleeve layer includes PA12.
- the tight sleeve material is designed as PA12, which has strong temperature resistance and mechanical properties.
- the material of the tensile reinforcement includes FRP.
- the tensile strength members include at least two; when there are two tensile strength members, the two tensile strength members are symmetrically arranged with respect to the center of the optical cable.
- the first sheath is a low-smoke halogen-free sheath.
- Most network cable coverings are composed of polyethylene, polyvinyl chloride or thermoplastic polyurethane. Chlorine-containing plastics will release toxic hydrogen chloride in the event of fire, and hydrochloric acid in the presence of water. LSZH materials, on the other hand, do not release hydrogen halide or other acids when they catch fire.
- the water blocking material is glass fiber yarn. Due to the increase of fiber, the water absorption rate of the resin can be reduced, so that it can work under high temperature and high humidity, and the affinity between nylon and glass fiber is very good. , but also to improve the tensile strength of nylon (PA).
- PA tensile strength
- a second protective layer is further included, the second protective layer covers the first protective layer, and the second protective layer is a nylon protective layer.
- the material of the second protective layer includes PA6.
- PA6 a layer of PA6 outside the first protective layer, the purpose of preventing rodents, insects and birds can be achieved.
- the thickness of the second protective layer is 0.2 mm ⁇ 5 mm.
- the thickness of the second protective layer is 0.5 mm ⁇ 5 mm.
- the protective layer of PA6 material when the thickness reaches 0.2mm, can completely prevent the damage of termites to the optical cable products. When the thickness reaches more than 0.5mm, it can effectively prevent the mouse from biting the optical cable.
- the present invention has the following advantages:
- the structure of the present invention is simple. On the basis of the existing bundled optical cable, it is optimized and upgraded, a tensile strength member is added, and the material of the tight sleeve layer is optimized, so that the optical cable disclosed in the present invention can meet the indoor requirements at the same time. Wiring use, short-distance overhead and indoor to outdoor pipeline introduction, to achieve the ultimate purpose of one cable with multiple uses.
- the material of the tight jacket layer includes PA12
- the material of the second sheath layer includes PA6, and the first sheath layer is a low-smoke halogen-free sheath.
- the tight structure design and material selection enable the optical cable to meet- At the working temperature of 45°C ⁇ 85°C, the attenuation change is less than or equal to 0.2dbm.
- the nylon tight-fitting layer mainly adopts PA12, which has stronger temperature resistance and mechanical properties.
- the second protective layer mainly adopts PA6, which can prevent rodents, insects and birds.
- FIG. 1 is a schematic diagram of the structure of an existing optical cable.
- FIG. 2 is a schematic diagram of the structure of the optical cable of the present invention.
- a non-metal ant-proof overhead conduit entry optical cable includes a second sheath 1 , a first sheath 2 and several optical fiber units, the second sheath 1 wraps the first sheath 2 , a tensile strength member 6 is embedded in the body of the first sheath 2 to improve the mechanical properties of the optical cable; all optical fiber units included in the incoming optical cable are located in the first sheath 2, and the optical fiber units include The optical fiber body 3 and the tight sleeve layer covering the optical fiber body, the tight sleeve layer is a nylon tight sleeve layer 4; the gap between the optical fiber unit and the first sheath 2 is filled with a water blocking material 5, In order to keep the inner space of the first protective layer 2 dry.
- the nylon tight sleeve layer 4 is made of PA12 material.
- the PA material does not gradually soften with the increase of the heating temperature. Softening in a narrow temperature range close to the melting point, its temperature resistance is stronger, it is more suitable for the laying of optical cables, and its operating temperature selectivity is stronger.
- PA12 is a good electrical insulator and has good impact resistance and mechanical and chemical stability. Compared with PA11, it can also meet the low temperature impact resistance. The stiffness and strength of PA12 are higher. Therefore, PA12 is the optimal solution disclosed in this embodiment.
- the second protective layer 1 is made of PA6.
- the second protective layer 1 made of PA6 material has higher impact strength, and has relatively good flexibility, thermoplasticity, toughness and durability. Compared with PA66, PA6 is more suitable for light load conditions of optical cable, and its wear resistance, self-lubrication and solvent resistance are better. And the protective layer of PA6 material, when the thickness reaches 0.2mm, can completely prevent the damage of termites to the optical cable products, and when the thickness reaches more than 0.5mm, it can effectively prevent the mouse from biting the optical cable.
- the thickness of the second protective layer 1 is preferably 0.5mm, 1mm, 2mm, 3mm, 4mm and 5mm, and the user can determine the final thickness according to requirements, so as to meet the requirements of the optical cable cross-sectional area without excessive
- the optical cable disclosed in this embodiment can also prevent rodents, insects and birds.
- the tensile reinforcement 6 is preferably a FRP reinforcement, and the FRP reinforcement is provided in the body of the first protective layer 2 in an inline form, and at least two are provided. It should be noted that when there are two FRP reinforcements, the two FRP reinforcements are symmetrically arranged relative to the center of the optical cable to give full play to its performance. When there are more than two FRP reinforcements, that is, three or more, more Each of the FRP strength members is arranged in an array with reference to the center of the fiber optic cable.
- the water blocking material 5 is preferably glass fiber yarn, because the increase of fiber can reduce the water absorption rate of the resin, so that it can work under high temperature and high humidity, and the affinity between nylon and glass fiber is very good, and when filling After the glass fiber yarn has the function of blocking water, the tensile strength of nylon (PA) can also be improved, so that the structures disclosed in this embodiment complement each other and obtain the maximum performance improvement.
- PA tensile strength of nylon
- the first protective layer 2 is a low-smoke halogen-free protective layer
- the nylon tight sleeve layer 4 is made of PA12
- the second protective layer 1 is made of PA6, and the low-smoke halogen-free protective layers themselves are close to each other.
- the structure makes the optical cable disclosed in this embodiment have strong temperature resistance, and can meet the working temperature of -45 ° C ⁇ 85 ° C, the attenuation change is less than or equal to 0.2dm, and the low-smoke halogen-free sheath is embedded with FRP reinforcements
- the short-term tensile force of the optical cable can reach 600N, that is, compared with the traditional bundled optical cable, the optical cable disclosed in this example has improved both the temperature resistance performance and the mechanical performance.
- the optical cable due to the compact structure of the low-smoke halogen-free sheath, after adding the water-blocking glass fiber yarn, the optical cable has excellent water-blocking performance, and the second sheath is arranged on the low-smoke halogen-free by extrusion. Outside the sheath and covering it, it further expands the water blocking performance of the optical cable, making it meet the water seepage test requirements of IEC60794-1-2-F5B.
- the traditional water-blocking layer usually uses aramid fiber yarn, and the optical cable disclosed in this embodiment not only saves the use of aramid fiber yarn, but also enables the optical cable to have the functions of overhead use and the introduction of indoor wiring directly into the pipeline. It is suitable for indoor wiring, and the optical cable disclosed in this embodiment realizes multiple uses of one cable.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
Abstract
一种非金属防蚁架空管道引入光缆,包括第一护层(2)和至少一个光纤单元,第一护层(2)的本体内嵌设有拉伸加强件(6);引入光缆包含的所有光纤单元均位于第一护层(2)内,光纤单元包括光纤本体(3)和包覆光纤本体(3)的紧套层(4),紧套层(4)为尼龙紧套层(4);光纤单元与第一护层(2)之间的间隙填充有阻水物(5)。光缆的结构简单,在现有束状光缆的基础上,对其进行优化提升,添加拉伸加强件(6),并对紧套层(4)的材料进行优化,从而使得光缆能够同时满足室内布线使用、短距架空和室内到室外管道引入,实现一缆多用的最终目的。
Description
本发明涉及光缆技术领域,尤其是涉及一种非金属防蚁架空管道引入光缆。
光缆是为了满足光学、机械或环境的性能规范而制造的,它是利用置于包覆护套中的一根或多根光纤作为传输媒质并可以单独或成组使用的通信线缆组件。
随着生活水平的提高,信息技术的进步,越来越多的地方需要敷设光缆以扩大信息传输的范围,多芯束状光缆作为光缆的一种,如图1所示,传统的多芯束状光缆无法满足现阶段各类复杂的工作环境,最大只能满足-40℃~75℃的工作环境,从而使得其功能受限,用途单一,只能用于室内综合布线。
发明内容
本发明的目的在于提供一种非金属防蚁架空管道引入光缆,以实现一缆多用。
为实现上述目的,本发明采用以下技术方案:
一种非金属防蚁架空管道引入光缆,包括第一护层和至少一个光纤单元,所述第一护层的本体内嵌设有拉伸加强件;引入光缆包含的所有光纤单元均位于所述第一护层内,所述光纤单元包括光纤本体和包覆所述光纤本体的紧套层,所述紧套层为尼龙紧套层;所述光纤单元与所述第一护层之间的间隙填充有阻水物。即本发明公开的结构不仅能够适用于多芯束状光缆,还能适用于单芯光缆。
优选的是,所述尼龙紧套层的材料包括PA12。紧套材料设计为PA12,具有较强的耐温性能和力学性能。
优选的是,所述拉伸加强件的材料包括FRP。
优选的是,所述拉伸加强件包括至少两个;当所述拉伸加强件为两个时,所述两个拉伸加强件相对光缆的中心对称设置。
优选的是,所述第一护层为低烟无卤护层。大部分的网络线包覆层是由聚乙烯、聚氯乙烯或热塑性聚氨酯组成。若着火时,含氯的塑胶会释放有毒的氯化氢,若遇到水会产生盐酸。而低烟无卤材料在着火时不会释放卤化氢或是其他酸类。
优选的是,所述阻水物为玻璃纤维纱。由于纤维增加可降低树脂吸水率,使其能在高温、高湿下工作,而尼龙与玻璃纤维的亲合性又十分良好,在填充阻水性玻璃纤维纱后,在起到阻水功能的同时,还能使尼龙(PA)的抗拉强度提高。
优选的是,还包括第二护层,所述第二护层包覆所述第一护层,所述第二护层为尼龙护层。
优选的是,所述第二护层的材料包括PA6。通过在第一护层外挤制一层PA6,能够实现防鼠、防虫咬和鸟类的目的。
优选的是,所述第二护层的厚度为0.2mm~5mm。
优选的是,所述第二护层的厚度为0.5mm~5mm。PA6材料的保护层,当厚度达到0.2mm时,可完全防止白蚁对光缆产品的侵害,当厚度达到0.5mm以上时,能有效防止老鼠对光缆的齿咬侵害。本发明具有以下优点:
1、本发明结构简单,在现有束状光缆的基础上,对其进行优化提升,添 加拉伸加强件,并对紧套层的材料进行优化,从而使得本发明公开的光缆能够同时满足室内布线使用、短距架空和室内到室外管道引入,实现一缆多用的最终目的。
2、本发明公开的光缆,紧套层的材料包括PA12,第二护层的材料包括PA6,第一护层为低烟无卤护层,紧密的结构设计以及材料的选择使得光缆能够满足-45℃~85℃的工作温度下,衰减变化量≤0.2dbm。
3、本发明公开的光缆,尼龙紧套层主要采用PA12,耐温性能和力学性能更强。
4、本发明公开的光缆,第二护层主要采用PA6,能够防鼠,防虫咬和鸟类。
下面结合附图对本发明的具体实施方式作进一步详细的说明。
图1是现有的光缆结构示意图。
图2是本发明的光缆结构示意图。
图中,各附图标记为:
1-第二护层,2-第一护层,3-光纤本体,4-尼龙紧套层,5-阻水物,6-拉伸加强件。
需要说明的是,当元件被称为“设置于”、“固设于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当元件被称为“固设于”另一个元件,或与另一个元件“固定连接”,它们之间可以是可拆卸固定方式也可以是不可拆卸的固定方式。当一个元件被认为是“连接”、“转 动连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。所使用的术语“垂直的”、“水平的”、“左”、“右”、“上”、“下”以及类似的表述只是为了说明的目的,并不表示是唯一的实时方式。
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方式的目的,不是旨在约束本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
本发明中所述“第一”、“第二”、“第三”等类似用于不代表具体的数量及顺序,仅仅是用于名称的区分。
如图2所示,一种非金属防蚁架空管道引入光缆,包括第二护层1、第一护层2和若干光纤单元,所述第二护层1包覆所述第一护层2,所述第一护层2的本体内嵌设有拉伸加强件6,以提高光缆的力学性能;引入光缆包含的所有光纤单元均位于所述第一护层2内,所述光纤单元包括光纤本体3和包覆所述光纤本体的紧套层,所述紧套层为尼龙紧套层4;所述光纤单元与所述第一护层2之间的间隙填充有阻水物5,以使所述第一护层2的内部空间保持干燥。
本实施例中,所述尼龙紧套层4采用PA12材料制成,PA材料与现有的PS、PE、PP、PO材料相比,PA材料不随受热温度的升高而逐渐软化,而是在一个靠近熔点的窄的温度范围内软化,其耐温性能更强,更合适光缆的敷设,其工作温度的可选择性更强。而对于PA的品种选择,PA12是很好的电气绝缘体,有很好的抗冲击性机化学稳定性,相对PA11,其在同样能满足低温抗冲 击性能的情况,PA12的刚度和强度更高,因此PA12为本实施例公开的最优解。
所述第二护层1采用PA6制成。通过PA6材料制成的第二护层1,其具备更高的冲击强率,且柔性性、热塑性、韧性和耐久性都相对较好。相对于PA66,PA6更适合光缆的轻载荷条件,其耐磨性、自润滑性和耐溶剂性更好。且PA6材料的保护层,当厚度达到0.2mm时,可完全防止白蚁对光缆产品的侵害,当厚度达到0.5mm以上时,能有效防止老鼠对光缆的齿咬侵害。因此,本实施例中,所述第二护层1的厚度优选0.5mm、1mm、2mm、3mm、4mm和5mm,用户可根据需求确定最终的厚度,从而实现在满足光缆横截面积不会过大的前提下,本实施例中公开的光缆还能够防鼠、防虫咬和鸟类。
本实施例中,所述拉伸加强件6优选FRP加强件,所述FRP加强件以内嵌的形式设置在所述第一护层2的本体中且至少设置两个,需要说明的是,当所述FRP加强件为两个时,两个所述FRP加强件相对光缆的中心对称设置以充分发挥其性能,当所述FRP加强件超过两个,即达到三个或三个以上时,多个所述FRP加强件以光缆的中心为参照进行阵列设置。
本实例中,所述阻水物5优选玻璃纤维纱,由于纤维增加可降低树脂吸水率,使其能在高温、高湿下工作,而尼龙与玻璃纤维的亲合性又十分良好,在填充玻璃纤维纱后,在起到阻水功能的同时,还能使尼龙(PA)的抗拉强度提高,从而使本实施例中的公开的结构相互补充获得最大的性能提升。
本实施例中,所述第一护层2采用低烟无卤护层,通过所述尼龙紧套层4采用PA12,第二护层1采用PA6,低烟无卤护层本身相互之间紧密的结构使本实施例公开的光缆具备较强的耐温性能,能够满足-45℃~85℃的工作温度下,衰减变化量≤0.2dm,而在低烟无卤护层内嵌FRP加强件更是使光缆允许 短期拉力达600N,即相对传统的束状光缆,本事实例中公开的光缆在耐温性能和力学性能上都得到了提升。
本实施例中,由于低烟无卤护层结构紧密,在添加了阻水性玻璃纤维纱后,使光缆具备优良的阻水性能,而第二护层通过挤制的方式设置在低烟无卤护层外并将其包覆,更是进一步扩大了光缆的阻水性能,使之满足IEC60794-1-2-F5B的渗水测试要求。
传统的阻水层通常采用芳纶纤维纱,而本实施例中公开的光缆,不仅节省了芳纶纤维纱的使用,还使光缆具备架空使用和室内布线直接到管道引入的功能,相对传统只适用于室内布线,本实施例中公开的光缆实现了一缆多用。
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例,本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换,均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。
Claims (10)
- 一种非金属防蚁架空管道引入光缆,其特征在于,包括第一护层和至少一个光纤单元,所述第一护层的本体内嵌设有拉伸加强件;引入光缆包含的所有光纤单元均位于所述第一护层内,所述光纤单元包括光纤本体和包覆所述光纤本体的紧套层,所述紧套层为尼龙紧套层;所述光纤单元与所述第一护层之间的间隙填充有阻水物。
- 根据权利要求1所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述尼龙紧套层的材料包括PA12。
- 根据权利要求1所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述拉伸加强件的材料包括FRP。
- 根据权利要求1所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述拉伸加强件包括至少两个;当所述拉伸加强件为两个时,所述两个拉伸加强件相对光缆的中心对称设置。
- 根据权利要求1所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述第一护层为低烟无卤护层。
- 根据权利要求1所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述阻水物为玻璃纤维纱。
- 根据权利要求1-6任意一项所述的一种非金属防蚁架空管道引入光缆,其特征在于,还包括第二护层,所述第二护层包覆所述第一护层,所述第二护层为尼龙护层。
- 根据权利要求7所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述第二护层的材料包括PA6。
- 根据权利要求7所述的一种非金属防蚁架空管道引入光缆,其特征在 于,所述第二护层的厚度为0.2mm~5mm。
- 根据权利要求9所述的一种非金属防蚁架空管道引入光缆,其特征在于,所述第二护层的厚度为0.5mm~5mm。
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