CN2802529Y

CN2802529Y - Indoor outdoor integral twisted optical cable

Info

Publication number: CN2802529Y
Application number: CN 200520096310
Authority: CN
Inventors: 王英明; 程淑玲; 王世颖; 史惠萍; 陈保平; 周扬; 杨伟明; 李宏强; 李青梅
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2005-05-12
Filing date: 2005-05-12
Publication date: 2006-08-02
Anticipated expiration: 2015-05-12

Abstract

The utility model relates to an integral layer-twisted type optical cable, which can simultaneously satisfy the indoor and outdoor environment and laying requirement. The utility model comprises a central reinforcing element and an outer sheath, and is characterized in that the periphery of the central reinforcing element is hinged with a tight fiber or a half tight fiber and is provided with a water resistant member, and then a sheathed layer is longitudinally wrapped, and the outside of the sheathed layer is wrapped by an outer sheath. The utility model not only can satisfy the operation requirement of outdoor environment, but also can satisfy the laying requirement of indoor environment; when the optical cable is arranged in a room, the outer sheath and an aluminium strip can be stripped off, a cable core can be directly led into the room for use, which does not need to be switched over or a joint, construction procedure can be reduced, wire laying efficiency can be increased, and the laying construction for the arrangement of the optical fiber into the room can be simplified. The utility model adopts the optical fiber unit of tight and half tight structure, particularly the adoption of the half tight fiber unit with multiple cores, the optical cable is light, dimension is small, and the structure of the optical cable is more reasonable; the dry type structural design can cause the diverging and the connection of the optical fiber to be more convenient.

Description

Indoor and outdoor integration lay-up optical cable

Technical field

The utility model relates to and a kind ofly can satisfy indoor and outdoor surroundings simultaneously and lay the integrated layer-stranding cable of requirement.

Background technology

Along with Fiber to the home (FTTH) technology rapid development, the requirement of the optical cable that is used for FTTH is also constantly being upgraded.At present, conventional outdoor use optical cable can satisfy the requirement of outdoor environment, but can not satisfy the requirement of indoor environment, can not be introduced directly into indoor; Inside cable can satisfy the requirement of indoor various conditions, but is difficult to adapt to outdoor environmental conditions.Optical fiber will be introduced indoorly in the prior art, generally be earlier outdoor optical cable to be incorporated in the building, changes inside cable again and be incorporated into indoor.Though this mode is feasible, bring several problems: the one, the increase that outdoor optical cable and inside cable switching have brought optical fiber attenuation; The 2nd, increased construction volume and difficulty of construction, the 3rd, increased the equipment material cost that outdoor optical cable and inside cable are transferred.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the deficiency that above-mentioned prior art exists, a kind of requirement of laying that can satisfy outdoor environment is provided, also can satisfy indoor various requirement of laying switchover condition, difference continues conveniently, optical fiber can be introduced directly into indoor integrated layer-stranding cable from the open air.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: include central reinforce member and oversheath, its difference is tight tube fiber or semi-tight sleeve optical fiber arranged in that the central reinforce member periphery is stranded, and water-blocking component is set, and then vertical bag armor, outside armor, coat oversheath.

Press such scheme, described semi-tight sleeve optical fiber contains 1～12 core bare fibre by the microbeam pipe and constitutes, and the diameter of bare fibre is 250 μ m, and the microbeam external diameter of pipe is below the 1.6mm.Described water-blocking component is water blocking yarn or water-proofing powder; Described central reinforce member is nonmetal central reinforce member; Described armor is made of overlay film aluminium strip or steel band.

Press such scheme, outside tight tube fiber or semi-tight sleeve optical fiber, can hold water resistance aramid fiber yarn, coat inner sheath again, outside inner sheath, coat armor.

The beneficial effects of the utility model are:

1. adopt cable configuration of the present utility model, make optical cable not only possess certain tensile strength, uvioresistant and total cross-section block-water performance but also keep bigger flexibility and fire resistance, therefore can satisfy the request for utilization of outdoor environment, also can satisfy the requirement of laying of indoor environment;

2. when in the optical cable inlet chamber, oversheath and aluminium strip can be divested, cable core is directly introduced indoor use, not need switching or joint, reduce construction link, improve wiring efficient, fiber-to-the-home cable laying operation is simplified;

3. adopt the fiber unit of tight cover and semi-tight sleeve structure, especially adopt the semi-tight sleeve fiber unit of multicore, make optical cable lighter, size is littler, and it is reasonable that cable configuration more becomes; And that dry construction design can make the difference of optical fiber continue is more convenient.

Description of drawings

Fig. 1 is the radial section figure of an embodiment of the utility model.

Fig. 2 is the radial section figure of second embodiment of the utility model.

Fig. 3 is the radial section figure of the 3rd embodiment of the utility model.

Embodiment

First embodiment of the utility model as shown in Figure 1,6 semi-tight sleeve optical fiber 1 are around a nonmetal central reinforce member (FRP) 2 stranded formation cable cores, semi-tight sleeve optical fiber contains 6～12 core bare fibres by the microbeam pipe and constitutes, and fills water blocking yarn 5 between the space of cable core; Cable core lays one deck water resistance aramid fiber yarn 3 outward, and water resistance aramid fiber yarn coats the inner sheath 4 that one deck has fire resistance outward, and inner sheath thickness is 0.35～0.5mm, and inner sheath is made of halogen-free low-smoke flame retardant material (LSZH) material; The vertical outward bag one deck of inner sheath overlay film aluminium strip 6, outermost layer coats oversheath 8; Oversheath is made by high density polyethylene (HDPE) or halogen-free low-smoke flame retardant material (LSZH) material.For ease of the stripping of opening of optical cable, place respectively in the inboard of inner sheath and oversheath inboard and to tear rope 7.

Second embodiment of the utility model be as shown in Figure 2: semi-tight sleeve optical fiber 1 is around nonmetal central reinforce member 2 stranded formation cable cores.Twine on nonmetal central reinforce member and tiling water blocking yarn 5, (semi-tight sleeve optical fiber is outer) twines and keeps flat water blocking yarn 5 on the cable core; The vertical outward bag one deck of cable core overlay film aluminium strip 6; Outermost layer coats one deck oversheath 8; Tear rope 7 to help the stripping of opening of optical cable inboard placement of oversheath.

The 3rd embodiment of the utility model be as shown in Figure 3: the main difference part of it and second embodiment is that 16 tight tube fibers 1 are around nonmetal central reinforce member 2 stranded formation cable cores.Can form water blocking layer by wrapped water blocking yarn around the nonmetal central reinforce member.The remainder structure is identical with second embodiment.

Claims

1. an indoor and outdoor integration lay-up optical cable includes central reinforce member and oversheath, and it is characterized in that has tight tube fiber or semi-tight sleeve optical fiber in that the central reinforce member periphery is stranded, and water-blocking component is set, and then vertical bag armor, coats oversheath outside armor.

2. by the described indoor and outdoor integration lay-up optical cable of claim 1, it is characterized in that described semi-tight sleeve optical fiber contains 1～12 core bare fibre by the microbeam pipe and constitutes, the diameter of bare fibre is 250 μ m, and the microbeam external diameter of pipe is below the 1.6mm.

3. by claim 1 or 2 described indoor and outdoor integration lay-up optical cables, it is characterized in that described water-blocking component is water blocking yarn or water-proofing powder; Described central reinforce member is nonmetal central reinforce member.

4. by claim 1 or 2 described indoor and outdoor integration lay-up optical cables, it is characterized in that described armor is made of overlay film aluminium strip or steel band.

5. by claim 1 or 2 described indoor and outdoor integration lay-up optical cables, it is characterized in that coating inner sheath again, outside inner sheath, coat armor at tight tube fiber or semi-tight sleeve optical fiber outsourcing winding water aramid yarn.