WO2011000312A1 - 光缆及光缆系统 - Google Patents

光缆及光缆系统 Download PDF

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Publication number
WO2011000312A1
WO2011000312A1 PCT/CN2010/074763 CN2010074763W WO2011000312A1 WO 2011000312 A1 WO2011000312 A1 WO 2011000312A1 CN 2010074763 W CN2010074763 W CN 2010074763W WO 2011000312 A1 WO2011000312 A1 WO 2011000312A1
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WO
WIPO (PCT)
Prior art keywords
skeleton
cable
optical
optical fiber
fiber
Prior art date
Application number
PCT/CN2010/074763
Other languages
English (en)
French (fr)
Inventor
吴文新
李德
赵峻
温运生
熊艳华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BRPI1014667A priority Critical patent/BRPI1014667A2/pt
Priority to EP10793607A priority patent/EP2420877A4/en
Priority to AU2010268582A priority patent/AU2010268582B2/en
Priority to MX2011013418A priority patent/MX2011013418A/es
Publication of WO2011000312A1 publication Critical patent/WO2011000312A1/zh
Priority to US13/300,038 priority patent/US8660392B2/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • 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
    • G02B6/4407—Optical cables with internal fluted support member
    • G02B6/4408—Groove structures in support members to decrease or harmonise transmission losses in ribbon 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
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • 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
    • G02B6/4482—Code or colour marking
    • 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
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or 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
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/4472—Manifolds
    • G02B6/4475—Manifolds with provision for lateral branching
    • 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
    • G02B6/449—Twisting
    • G02B6/4491—Twisting in a lobe structure

Definitions

  • the present invention relates to a network cabling cable, and more particularly to an optical cable and an optical cable system suitable for use in indoor wiring. Background technique
  • FTTH Fiber To The Home
  • the main problems are:
  • FTTH has a high cost due to deployment, affecting FTTH's large-scale commercial use.
  • FTTM Fiber To The MDU (Multiple Dwelling Unit), fiber to multi-dwelling unit.
  • FTTM can gradually improve business penetration and is more beneficial to service providers.
  • an existing optical cable suitable for vertical deployment in a building includes an outer layer of a low-smoke halogen-free flame-retardant jacket 101 and an inner easily peelable optical fiber unit 104, wherein the low-smoke halogen-free flame-retardant jacket 101 is A glass reinforcement rib 102 is provided and an outer jacket reinforcement rib mark 103 is provided at the corresponding outer surface.
  • the shortcomings of the above scheme are as follows: First, the length of the fiber extraction is limited, and the customer with a long distance to the household needs to be connected; secondly, the window is opened and cut off before the fiber is extracted, and there is interference between the fiber units during the extraction; In addition, it is difficult to find the fiber to be cut when the number of cores is large. Also, since the fiber station is "stationed" in the sheath, the vertical height is limited or special measures must be taken. Summary of the invention
  • embodiments of the present invention provide an optical cable suitable for wiring in a building and an optical cable system.
  • An embodiment of the present invention provides an optical cable, wherein the optical cable includes an SZ cable skeleton and a plurality of optical fiber units, and a plurality of skeleton slots are disposed on the outer circumference of the skeleton, and the plurality of optical fiber units are respectively grouped and disposed in the corresponding skeleton slots. .
  • Another embodiment of the present invention provides an optical cable system applicable to a building having a plurality of floors, the system including a distribution box and a plurality of optical cables connected to the distribution box, wherein the optical cable includes an SZ type optical cable a skeleton and a plurality of optical fiber units, wherein the outer circumference of the cable skeleton iHJ is provided with a plurality of skeleton slots, and the plurality of optical fiber units are grouped and disposed in corresponding skeleton slots, and some or all of the optical fiber units in the skeleton slots respectively pass The splitter bows out and extends to the user's room on the corresponding floor.
  • the optical cable and the in-building optical cable system provided by the embodiments of the present invention use the SZ cable skeleton to protect the internal optical fiber from being squeezed, and the optical fiber unit can be "slanted" against the inner wall of the skeleton after being vertically placed to ensure the optical fiber unit.
  • the force is extended to extend the service life of the optical fiber, thereby having the advantages of easy peeling, easy extraction, high reliability, and long service life.
  • optical fiber units in the optical cable and the optical cable system provided by the embodiments of the present invention are separately disposed in the skeleton slots of the SZ-type optical cable frame according to requirements, when the optical cable is used for vertical wiring installation in the building, not only the floor differences need not be connected, but Direct deployment to the home, reducing splice/termination time, simplifying cable routing, and greatly reducing ODN deployment costs. Fast FTTX ODN scale deployment, and avoids mutual interference when extracting fiber, increasing the reliability of the fiber after installation.
  • FIG. 1 is a schematic structural view of a prior art optical cable.
  • FIG. 2A is a schematic perspective view of a vertical wiring optical cable according to an embodiment of the present invention.
  • Fig. 2B is a schematic cross-sectional view of the optical cable shown in Fig. 2A.
  • FIG. 3 is a schematic structural diagram of a skeleton used in an optical cable according to an embodiment of the present invention.
  • FIG. 4 is a schematic perspective structural view of another embodiment of a vertical wiring optical cable provided by the present invention.
  • FIG. 5 is a flow chart of a method for installing vertical wiring in a building by using the optical cable provided by the embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing an installation method for installing vertical cables in a building by using the optical cable provided by the embodiment of the present invention.
  • the embodiment of the present invention firstly provides a wiring optical cable, which is applicable to indoor (indoor) vertical wiring, which comprises an SZ cable skeleton and an outer protective sleeve, and a plurality of skeleton slots are arranged on the outer circumference of the skeleton. It can protect the internal fiber from being squeezed, and the fiber unit can be “slanted” against the inner wall of the frame after being placed vertically, ensuring that the fiber unit is subjected to the force in the vertical cable to extend the service life of the fiber.
  • an embodiment of the present invention further provides an optical cable system applicable to a building having a plurality of floors, the system comprising a distribution box and a plurality of optical cables connected to the distribution box, wherein the optical cable includes SZ The fiber optic cable skeleton and the plurality of fiber units, wherein the cable skeleton outer circumference IHJ is provided with a plurality of skeleton slots, and the plurality of fiber units are grouped and disposed in the corresponding skeleton slots, and some or all of the fiber units in the skeleton slots are They are respectively led out through the splitter and extended to the user's room of the corresponding floor.
  • optical fiber units in the optical cable are respectively arranged in the skeleton slots of the SZ-type optical cable skeleton, not only the floor differences need not be connected, but also can be directly distributed to the household, and the mutual elimination of the optical fibers is avoided. Disturb. Bright.
  • the vertical wiring cable 100 includes an SZ cable skeleton 110, an outer sheath 150 of the outer periphery of the skeleton, and an optical fiber unit 170.
  • the center of the skeleton 110 is provided with a reinforcing member 130, and the outer circumference of the skeleton 110 is uniformly provided with a plurality of skeleton grooves 111.
  • An accommodating space for accommodating the optical fiber unit 170 is formed between each of the skeleton slots 111 and the outer protective sleeve 150.
  • the optical fiber units 170 to be disposed in the optical cable are grouped and disposed in the respective skeleton slots 111.
  • the optical cable 100 is 24 cores (that is, the number of the optical fiber units 170 inside the optical cable 100 is 24), the number of the skeleton slots 111 is six, and each of the skeleton slots 111 is provided with four tight sleeves.
  • the optical fibers, and the fiber units in each skeleton slot 111 are distinguished by color patches. It should be understood that the number and grouping of the optical fiber units 170 inside the optical cable 100 can be specifically determined according to actual needs, and the above 24-core 6-group setting is only an optional embodiment.
  • the optical fiber unit 170 is a tight-fitting optical fiber unit, and includes an optical fiber and a tight sleeve sleeved around the outer periphery of the optical fiber.
  • the optical fiber conforms to the G.657 optical fiber standard, and the tight casing is a 900um tight casing.
  • the fiber unit 170 can be identified by full chromatogram.
  • the protective sleeve 150 may be provided with a fiber mark 151 at a corresponding position of the skeleton slot 111 of the SZ cable skeleton 110.
  • a metal wire may be nested in a corresponding position on the surface of the protective cover 150 ( Or metal strip).
  • the fiber mark 151 facilitates accurate positioning of the skeleton groove 111 requiring windowing during installation to properly find the corresponding fiber unit 170.
  • FIG. 3 is a schematic structural view of the SZ cable skeleton 110 used in the embodiment of the present invention.
  • the embodiment of the present invention uses the SZ type cable skeleton 110 to provide protection to the internal fiber unit 170 from being crushed.
  • the skeleton groove 111 is spirally distributed on the outer circumference of the skeleton 110 in an SZ shape; and, the plurality of skeletons are viewed from a cross section of the SZ cable skeleton 110.
  • the grooves 110 are evenly distributed at the cross-sectional edge positions of the skeleton 110, and the specific distribution of the skeleton grooves 111 can be seen in FIG. Since the fiber units 170 are grouped in the skeleton slot of the SZ distribution In 111, the optical fiber unit 170 is equivalent to performing SZ twisting in a plurality of groups.
  • each of the skeleton slots 111 has a bottom surface and two inner walls, and the opening of the skeleton slot 111 is slightly wider than the bottom surface, thereby causing the two inner walls to be inclined at an angle with respect to the bottom surface, respectively.
  • the specific SZ angle of the SZ cable skeleton 110 and the inclination angle of the inner wall of the skeleton slot 111 with respect to the ground can be determined according to the force of the optical fiber unit 170 disposed in the skeleton slot 110 after the optical cable is vertically placed. .
  • the optical fiber unit 170 disposed inside the skeleton groove 111 can be "slanted" against the inner wall of the skeleton groove 110, and the force is kept uniform.
  • N is the pressure of the optical fiber unit 170 on the inner wall of the skeleton groove 111
  • S is the supporting force of the inner wall of the skeleton groove 111 to the optical fiber unit 170
  • F is the optical fiber unit 170 being subjected to gravity The vertical pulling force
  • f is the friction of the inner wall of the skeleton groove 111 against the optical fiber unit 170.
  • a suitable SZ angle and/or an inclination angle of the inner wall of the skeleton groove 111 with respect to the bottom surface can be selected according to requirements, so as to realize the supporting force and friction against the optical fiber unit 170 by the inner wall of the SZ-type skeleton groove 111.
  • the force ensures that the optical fiber unit 170 is evenly stressed after the optical cable is vertically placed, thereby achieving the purpose of extending the service life of the optical fiber.
  • the optical fiber units 170 in the optical cable are effectively distributed into different skeleton slots 111 by the grouping, and the optical fiber units 170 in the optical fiber skeleton slots 110 can be distinguished by color codes, and the mutual extraction of the optical fibers can be reduced. interference.
  • the number of the optical fiber units 170 in each of the skeleton slots 111 of the optical cable may be an integral multiple of the number of users of each layer supported.
  • four tight-fitting optical fiber units 170 are disposed in each of the skeleton slots 111. It can correspond to 4 households on each floor. Of course, it is not limited to this. For example, if there are five households on a certain floor, it is also possible to use a scheme in which eight tight-set optical fiber units 170 are arranged in each skeleton slot 111. In addition, a certain space should be reserved after allocating the optical fiber unit 170 in each cable skeleton slot 111, so that the optical fiber can be extracted from the cable skeleton slot 111 during construction.
  • the installation method of the vertical installation in the optical cable building corresponding to the embodiment is described below. It is assumed that the user is on the second floor, and the vertical wiring optical cable provided by the embodiment of the present invention can be installed in the building, and the installation method described in FIG. 5 can be used. And the specific installation process is shown in Figure 6.
  • the installation method includes the following steps:
  • the optical cable is opened.
  • the cable can be opened by circumscribing the cable protection sleeve or opening the window along the skeleton slot.
  • the required fiber unit can be completely extracted from top to bottom, or, in order to avoid When the particularly long fiber unit is extracted, the fiber may be broken due to excessive friction.
  • the fiber unit may be cut off at a certain floor on the upper floor according to the specific length to shorten the extraction length.
  • the extracted fiber unit is taken out by the branching device and directly discharged to the household. After the extracted fiber unit passes through the branching device, it is directly placed on the household, and no connection is needed in the middle.
  • the optical fiber unit inside the skeleton slot is inclined, in the inner wall of the skeleton slot, the optical fiber extraction can be conveniently performed after the cable is opened, and the optical fiber is easily installed.
  • the optical fiber unit can be effectively partitioned in the optical cable to avoid mutual interference when extracting the optical fiber.
  • the optical fiber unit can be evenly stressed in the vertically placed optical cable. After completing the indoor wiring of the optical cable according to the optical cable installation method, at least one in-building optical cable system is formed within the building.
  • the in-building cable system may include a distribution box and a plurality of optical cables connected to the distribution box, the optical cable includes an SZ-type optical cable skeleton and a plurality of optical fiber units, and the optical cable skeleton outer circumference IHJ is provided
  • the plurality of fiber slots are grouped and disposed in the corresponding skeleton slots, and some or all of the fiber units in the skeleton slots are respectively led out by the branches and extended to the user rooms of the corresponding floors.
  • the optical cable 100 provided in the above embodiment can be used for the optical cable in the system.
  • the number of fiber units in each skeleton slot of the cable is an integral multiple of the number of users per layer of the floor.
  • the optical cable further includes an outer protective cover, the outer protective cover includes a window for guiding the optical fiber unit, the window is an annular window or along the The window set by the skeleton slot.
  • in-building optical cable system provided by the embodiments of the present invention can also be obtained by using other optical cable installation methods.
  • the optical cable can be used not only for vertical wiring but also for horizontal wiring, such as introducing a fiber optic cable on a certain floor, in different office areas. Diverging a certain number of cores of fiber to the office or desktop.
  • the specific construction methods and steps are the same as the vertical wiring. Therefore, any equivalents and modifications made by those skilled in the art, which are made without departing from the spirit and scope of the invention, or equivalent changes and modifications in accordance with the scope of the present invention should still be covered by this patent. The scope.

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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)
  • Suspension Of Electric Lines Or Cables (AREA)

Description

光缆及光缆系统 本申请要求于 2009年 07月 03日提交中国专利局、 申请号为 200910139853.2、 发明名称为"光缆及光缆系统"的中国专利申请的优先权，其全部内容通过引用结 合在本申请中。 技术领域
本发明涉及一种网络布线光缆， 尤其是指一种适用于楼内布线的光缆及一 种光缆系统。 背景技术
FTTH ( Fiber To The Home, 光纤到户 )在楼内布放困难， 是影响 FTTH规 模商用的主要原因。 由于环境复杂， 室内光缆的铺设对于部署 FTTH网络是一个 巨大的挑战。 主要存在的问题有：
1) 普通垂直布线产品在楼道内需要分歧和接续， 不仅需要专业的人员和工 具， 还需使用占空间比较大分纤盒。
2) 在楼道内分歧时接续增加工程成本， 同时还增加了光纤的损耗。
3) 楼道空间小， 施工环境差， 增加施工难度。
FTTH因布放成本居高不下， 影响 FTTH大规模商用。 为寻找降低成本的布 放方式， 启动 FTTX 的规模商用， 业界将目光转向 FTTM ( Fiber To The MDU( Multiple Dwelling Unit), 光纤到多住户单元）。相对于 FTTH, FTTM能逐 步提高业务参透率， 对服务提供商更有利。
现有的一种 FTTM光缆布线方案具体如下：
如图 1 所示， 现有的一种适合楼内垂直布放的光缆包括外层的低烟无卤阻 燃外套 101和内部的易剥离光纤单元 104,其中低烟无卤阻燃外套 101中设有玻 璃加强筋 102, 并在对应的外表面处设有外护套加强筋标记 103。
釆用上述光缆进行垂直布放时主要包括以下步骤 艮设用户在二楼）： (1) 在 地下室安装分配盒； （2) 安装垂直光缆； （3) 到四楼或更高楼层（按长度需要） 在垂直光缆的外套上开窗； （4) 选出要拉到二楼的光纤， 剪断该光纤； （5) 回到 二楼， 在光缆外套上开窗； （6)抽取出在四楼剪断的光纤； （7) 将抽取出的光纤 接入用户室内。
上述方案的缺陷如下： 首先， 光纤抽取的长度有一定限制， 入户距离长的 客户需要再接续； 其次， 在光纤抽取前需到上面楼层开窗并剪断， 并且抽取时 光纤单元间有干扰； 另外， 在光缆芯数较大时， 找出被剪光纤比较困难； 还有， 由于光纤单元 "站"在护套内， 垂直高度受限或必须釆用特别措施。 发明内容
鉴于以上问题， 本发明实施例提供一种适用于楼内布线的光缆以及一种光 缆系统。
本发明一实施例提供一种光缆， 其中， 该光缆包括 SZ型光缆骨架及多个光 纤单元， 该骨架外周 设有多个骨架槽， 所述多个光纤单元分组后分别设于对 应骨架槽内。
本发明另一实施例提供一种光缆系统， 其可应用在具有多个楼层的楼宇， 所述系统包括分配盒和连接至所述分配盒的多根光缆， 其中， 所述光缆包括 SZ 型光缆骨架及多个光纤单元， 所述光缆骨架外周 iHJ设有多个骨架槽， 所述多个 光纤单元分组后分别设于对应骨架槽内， 且所述骨架槽内的部分或全部光纤单 元分别通过分支器弓 )出并延伸至对应楼层的用户室内。
本发明实施例提供的光缆和楼内光缆系统釆用 SZ型光缆骨架，能够给内部 光纤提供保护， 防止受挤压， 且垂直放置后使光纤单元能够"斜靠"在骨架内壁， 保证光纤单元在垂直的光缆内均勾受力， 达到延长光纤使用寿命的目的， 从而 具有易剥离、 易抽取、 高可靠、 使用寿命长的优点。 并且， 由于本发明实施例 提供的光缆和光缆系统内的光纤单元按照需要分设于 SZ型光缆骨架的各骨架槽 内， 在利用该光缆进行楼内垂直布线安装时， 不仅楼层分歧无须接续， 可直接 布放到户， 减少熔接 /端接时间， 简化光缆布线， 大大降低 ODN部署成本， 加 快 FTTX ODN的规模部署， 而且避免了抽取光纤时相互干扰， 增加了安装后光 纤的可靠性。 附图说明
图 1为现有技术一种光缆的结构示意图。
图 2A为本发明实施例提供的垂直布线光缆的立体结构示意图。
图 2B为图 2A所示的光缆的截面示意图。
图 3为本发明实施例提供的光缆中所釆用的骨架的结构示意图。
图 4为本发明提供的垂直布线光缆另一实施例的立体结构示意图。
图 5为釆用本发明实施例提供的光缆进行楼内垂直布线的安装方法流程图。 图 6 为釆用本发明实施例提供的光缆进行楼内垂直布线的安装方法实施示
具体实施方式
本发明实施例首先提出一种布线光缆，该光缆可适用于进行楼内（室内）垂直 布线， 其包括 SZ型光缆骨架及外层保护套， 该骨架外周 设有多个骨架槽， 所 架， 能够给内部光纤提供保护， 防止受挤压， 且垂直放置后使光纤单元能够"斜 靠"在骨架内壁， 保证光纤单元在垂直的光缆内均勾受力， 达到延长光纤使用寿 命的目的。
对应地， 本发明实施例还提出一种光缆系统， 其可应用在具有多个楼层的 楼宇， 所述系统包括分配盒和连接至所述分配盒的多根光缆， 其中， 所述光缆 包括 SZ型光缆骨架及多个光纤单元， 所述光缆骨架外周 IHJ设有多个骨架槽， 所 述多个光纤单元分组后分别设于对应骨架槽内， 且所述骨架槽内的部分或全部 光纤单元分别通过分支器引出并延伸至对应楼层的用户室内。
由于该光缆内的光纤单元按照需要分设于 SZ型光缆骨架的各骨架槽内， 因 此， 不仅楼层分歧无须接续， 可直接布放到户， 而且避免了抽取光纤时相互干 扰。 明。
如图 2A、 图 2B所示， 本实施例中， 该垂直布线光缆 100包括 SZ型光缆骨 架 110、 骨架外周的外层保护套 150以及光纤单元 170。 骨架 110中心设有加强 件 130, 该骨架 110外周均匀 IHJ设有多个骨架槽 111。 各骨架槽 111与外层保护 套 150间形成用于收容光纤单元 170的容置空间， 而光缆内需要设置的各光纤 单元 170分组之后对应设于各骨架槽 111内。
本实施例中，该光缆 100为 24芯（即该光缆 100内部的光纤单元 170的数目 为 24根)， 该骨架槽 111的数目为 6个， 每一骨架槽 111内设有 4根紧套光纤， 且每个骨架槽 111 内的光纤单元釆用色标区分。 应当理解， 所述光缆 100 内部 光纤单元 170的数目和分组可根据实际需要具体确定， 以上 24芯分 6组设置仅 为一可选的实施例。
另外， 本实施例中， 该光纤单元 170 为紧套光纤单元， 其包括光纤及套设 在所述光纤外围的紧套管。 其中， 所述光纤符合 G.657光纤标准， 所述紧套管为 900um紧套管。 并且， 所述光纤单元 170可釆用全色谱识别。
进一步地，如图 4所示，所述保护套 150在 SZ型光缆骨架 110的骨架槽 111 对应位置可设置有光纤标记 151 , 比如， 所述保护套 150表面对应位置可嵌套有 金属线 (或金属条)。所述光纤标记 151可便于在安装时准确定位需要开窗的骨架 槽 111的位置， 以便正确地找到对应的光纤单元 170。
请一并参阅图 2A、 图 2B和图 3 , 其中图 3为本发明实施例中所釆用的 SZ 型光缆骨架 110的结构示意图。 本发明实施例釆用 SZ型光缆骨架 110, 能够给 内部光纤单元 170提供保护， 防止受挤压。
具体而言， 所述 SZ型光缆骨架 110中， 所述骨架槽 111呈 S-Z螺旋分布在 所述骨架 110外周； 并且， 从所述 SZ型光缆骨架 110的横截面上看， 所述多个 骨架槽 110均匀分布在所述骨架 110的横截面边缘位置，所述骨架槽 111的具体 分布可参见图 3。 由于所述光纤单元 170分组设置在所述呈 S-Z分布的骨架槽 111中， 因此所述光纤单元 170相当于分多组进行 S-Z绞合。
该光缆骨架 110中，每个骨架槽 111分别具有一底面和两个内壁，且所述骨 架槽 111 的开口比底面略宽， 由此使得所述两个内壁分别相对于所述底面倾斜 一定角度。 需要注意的是， 所述 SZ型光缆骨架 110具体的 S-Z角， 以及骨架槽 111内壁相对于地面的倾斜角度可根据光缆垂直放置后设置在骨架槽 110中的光 纤单元 170的受力情况来决定。
釆用上述结构的光缆在垂直放置后，设置在所述骨架槽 111内部的光纤单元 170能够"斜靠"在骨架槽 110的内壁， 并保持受力均匀。 具体而言， 如图 2A、 2B所示， 其中 N为光纤单元 170对骨架槽 111的内壁的压力， S为骨架槽 111 的内壁对光纤单元 170的支撑力， F为光纤单元 170因重力受到的垂直拉力， 而 f为骨架槽 111的内壁对光纤单元 170的摩擦力。 利用本发明实施例提供的光缆 结构， 可根据需要选取合适的 S-Z角和 /或骨架槽 111 内壁相对于底面的倾角， 以实现利用 SZ型骨架槽 111内壁斜面对光纤单元 170的支撑力和摩擦力，保证 光纤单元 170在光缆垂直放置后均匀受力， 达到延长光纤使用寿命的目的。
另外， 本发明实施例将光缆内的光纤单元 170通过分组有效分配到不同的 骨架槽 111内，光缆骨架槽 110内的光纤单元 170可釆用色标来区分，且能够减 少光纤抽取时的相互干扰。
具体地，光缆的每个骨架槽 111中的光纤单元 170的数量可以为所支持的每 层用户数量的整数倍， 本实施例中各骨架槽 111中设有 4根紧套光纤单元 170, 其可与每一楼层的 4 户相对应。 当然不限于此， 如某一楼层有五户， 也可釆用 每骨架槽 111内设置 8根紧套光纤单元 170的方案。 此外， 每个光缆骨架槽 111 内分配光纤单元 170后应还预留有一定空间， 便于施工时从光缆骨架槽 111 内 抽取光纤。
下面介绍与本实施例对应的光缆楼内垂直布放安装方法， 假设用户在 2楼， 本发明实施例提供的垂直布线光缆在进行楼内安装的时可釆用图 5 所述的安装 方法， 且具体安装过程如图 6所示。 该安装方法包括以下步骤：
( 1 )安装分配盒； ( 2 )布放垂直布线光缆， 在光缆布放时， 可使得该垂直光缆的长度大于光 纤到户的最大距离， 确保光纤在布放到户的过程中不需要接续， 冗余部分的光 缆可放置在楼顶；
( 3 )在需要布放光纤的楼层内， 对光缆进行开窗， 具体地， 可釆取环切光 缆保护套的方式或沿骨架槽开窗的方式给光缆开窗。
( 4 )选择对应的骨架槽， 并从其中抽取所需的光纤单元， 用保护盒盖住被 切开的窗口， 具体地， 可从上到下完全抽取出所需要的光纤单元， 或者， 为避 免抽取特别长的光纤单元时由于摩擦力过大可能导致光纤断裂的问题， 可以根 据具体长度的需要在楼上某一楼层剪断所述光纤单元以缩短抽取长度。
( 5 )通过分支器将被抽取出的光纤单元引出并直接布放到户， 被抽取出的 光纤单元穿过分支器后， 直接布放到户， 中间不需要任何连接。
由上述可知， 利用本发明实施例提供的光缆结构， 由于骨架槽内部的光纤 单元"斜靠，，在骨架槽的内壁， 因此对光缆开窗之后可方便地进行超长的光纤抽 取， 而且安装过程中发生楼层分歧时无须对光纤进行接续， 可直接布放到户。 并且， 该光缆中对光纤单元进行有效分区， 可以避免抽取光纤时相互干扰。 另 外， 根据实际需要确定的合适的 S-Z角， 可保证光纤单元在垂直放置的光缆内均 匀受力。 当按照所述光缆安装方法完成光缆的楼内布线之后， 在楼宇之内便形 成至少一个楼内光缆系统。
在具体实施例中， 所述楼内光缆系统可包括分配盒和连接至所述分配盒的 多根光缆， 所述光缆包括 SZ型光缆骨架及多个光纤单元， 所述光缆骨架外周 IHJ 设有多个骨架槽， 所述多个光纤单元分组后分别设于对应骨架槽内， 且所述骨 架槽内的部分或全部光纤单元分别通过分支器引出并延伸至对应楼层的用户室 内。
所述系统中的光缆可釆用上述实施例提供的光缆 100, 其具体结构可参阅以 上实施例。 另外， 所述系统中， 所述光缆的每个骨架槽中的光纤单元的数量为 所述楼层的每层用户数量的整数倍。 并且， 所述光缆还包括外层保护套， 所述 外层保护套包括用于引出所述光纤单元的窗口， 所述窗口为环形窗口或沿所述 骨架槽设置的窗口。
当然，应当理解，本发明实施例提供的楼内光缆系统还可釆用其它光缆安装 方法得到。
虽然本发明已以具体实施例揭示， 但其并非用以限定本发明， 例如该光缆 不仅可用于垂直布线， 也同样可以用做水平布线， 如在某楼层引入一根光缆， 在不同的办公区分歧出一定芯数的光纤到办公室或桌面。 具体施工方法和步骤 和垂直布线相同。 因此， 任何本领域的技术人员， 在不脱离本发明的构思和范 围的前提下所作出的等同组件的置换， 或依本发明专利保护范围所作的等同变 化与修饰， 皆应仍属本专利涵盖的范畴。

Claims

权 利 要求 书
1. 一种光缆， 其特征在于， 该光缆包括 SZ型光缆骨架及多个光纤单元， 该光缆骨架外周凹设有多个骨架槽， 所述光缆内的多个光纤单元分组后分别设 于对应骨架槽内。
2. 如权利要求 1所述的光缆， 其特征在于， 所述 SZ型光缆骨架的 S-Z角 由所述光纤单元在所述骨架槽中的受力情况决定， 其中所述 S-Z角使得所述骨
3. 如权利要求 2所述的光缆， 其特征在于， 每一骨架槽包括一个底面和 两个内壁， 所述两个内壁分别与所述底面具有倾角。
4. 如权利要求 1 所述的光缆， 其特征在于， 所述光纤单元为紧套光纤单 元， 其包括符合 G.657标准的光纤及套设在所述光纤外围的紧套管。
5. 如权利要求 1 所述的光缆， 其特征在于， 还包括外层保护套， 所述保 护套包括光纤标记， 且所述光纤标记设置在所述骨架槽的对应位置。
6. 如权利要求 5所述的光缆， 其特征在于， 所述光纤标记为金属线或金 属条， 其嵌套在所述保护套中， 用于标记收容所述光纤单元的骨架槽的位置。
7. 如权利要求 1所述的光缆， 其特征在于， 所述光纤单元的数目为 M, 所述骨架槽的数目为 N, 每个骨架槽内部分别设置有 M/N个光纤单元。
8. 一种光缆系统， 应用在具有多个楼层的楼宇， 所述系统包括分配盒和 连接至所述分配盒的多根光缆， 其特征在于， 所述光缆包括 SZ型光缆骨架及 多个光纤单元， 所述光缆骨架外周 设有多个骨架槽， 所述多个光纤单元分组 后分别设于对应骨架槽内，且所述骨架槽内的部分或全部光纤单元分别通过分 支器引出并延伸至对应楼层的用户室内。
9. 如权利要求 8所述的光缆系统， 其特征在于， 所述 SZ型光缆骨架的 S-Z角由所述光纤单元在所述骨架槽中的受力情况决定， 所述 S-Z角使得所述 骨架槽向所述光纤单元提供作用力以使所述光纤单元在所述骨架槽中受力均 匀。
10. 如权利要求 9所述的光缆系统， 其特征在于， 每一骨架槽包括一个底 面和两个内壁， 所述两个内壁分别与所述底面具有倾角。
11. 如权利要求 8所述的光缆系统， 其特征在于， 所述光缆的每个骨架槽 中的光纤单元的数量为所述楼宇中的每层用户数量的整数倍。
12. 如权利要求 8所述的光缆系统， 其特征在于， 所述光缆还包括外层保 护套， 所述外层保护套包括用于引出所述光纤单元的窗口， 所述窗口为环形窗 口或沿所述骨架槽设置的窗口。
13. 一种光缆， 其特征在于， 包括骨架及多个光纤单元， 该骨架包括多个 收容槽， 所述多个收容槽呈 S-Z型螺旋分布在所述光缆骨架的外周， 且所述多 个光纤单元收容于所述多个收容槽内部， 所述收容槽使得所述光缆在垂直放置 时收容在其内部的光纤单元受力均匀。
14. 如权利要求 13所述的光缆， 其特征在于， 每一骨架槽包括一底面， 且所述骨架槽的开口的宽度大于其底面的宽度。
15. 如权利要求 14所述的光缆， 其特征在于， 还包括外层保护套， 所述 保护套包括光纤标记， 所述光纤标记嵌套在所述保护套中， 用于标记收容所述 光纤单元的骨架槽的位置。
PCT/CN2010/074763 2009-07-03 2010-06-30 光缆及光缆系统 WO2011000312A1 (zh)

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