CN201812071U

CN201812071U - ADSS (all-dielectric self-supporting) optic fiber cable

Info

Publication number: CN201812071U
Application number: CN2010202982295U
Authority: CN
Inventors: 沈小平; 陈炳炎; 张海军
Original assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Current assignee: Tongding Interconnection Information Co Ltd
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-04-27
Anticipated expiration: 2020-08-20

Abstract

The utility model relates to an ADSS (all-dielectric self-supporting) optic fiber cable, which comprises a cable core, an inner protective layer, a twisting layer and an outer protective layer, wherein the periphery of the cable core are coated with the inner protective layer, the twisting layer and the outer protective layer sequentially; the cable core comprises an FPP (fiber reinforce plastic) reinforcing bar positioned in the center, a plurality of optical fiber bundle pipe units arranged on the periphery of the FPR reinforcing bar, and water-blocking tapes, wherein the optical fiber bundle pipe units are longitudinally covered by the water-blocking tapes; the twisting layer is formed by twisting a plurality of flexible FRP ropes on the periphery of the inner protective layer; and each flexible FRP rope is made from ethylene and vinyl acetate copolymer and fiber. The ADSS optic fiber cable uses the flexible FRP ropes made from the ethylene and vinyl acetate copolymer and fiber to replace the traditional aramid fiber yarn as a tension resistant element. The flexible FRP ropes can form the twisting layer on the optic cable by using a normal twisting process and the consistent tension of each FRP rope is easy to maintain, thereby ensuring that the ADSS optic fiber cable can bear large drawing force when overhead laid. The ADSS optic fiber cable has higher practicability.

Description

A kind of ADSS optical cable

Technical field

The utility model relates to uses the ADSS optical cable in a kind of optical fiber communication.

Background technology

Tradition ADSS cable configuration as shown in Figure 1.It comprises cable core 1 ', be coated on the sheath 2 ' of cable core 1 ' periphery successively, stranded layer 3 ', outer jacket 4 ', cable core 1 ' comprises center FRP stirrup 11 ', be positioned at the optical fiber bundle tubes unit 12 ' of stirrup 11 ' peripheral distribution, wrap the waterstop 13 ' of optical fiber bundle tubes unit 12 ', wherein, stranded layer 3 ' is as the anti-element of opening of ADSS optical cable, it is mainly made by aramid yarn, there are two big shortcomings in this traditional ADSS cable configuration: the one, and the tension force of the per share aramid yarn of stranded technological requirement of aramid yarn is consistent, if not, in the time of can causing optical cable to be subjected to pulling force, each strand aramid yarn stressed inconsistent, less than design strength, and this technological requirement is difficult to accomplish when practical operation with the tensile strength that makes optical cable reality; The 2nd, aramid yarn and oversheath difficulty are bonded together, and the ADSS optical cable is when built on stilts laying, and pulling force is very big, and is bonding bad as aramid yarn and oversheath, sheath can be broken.So the need pumping high vacuum can head it off in ADSS cable outer sheath extrusion process.Therefore, all there is certain defective in existing ADSS optical cable no matter still make in actual use in the technology.

The utility model content

The technical problems to be solved in the utility model provides a kind of can bearing than large traction pulling force and the better simply ADSS optical cable of technology.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of ADSS optical cable, comprise cable core, be coated on sheath, stranded layer and the outer jacket of cable core periphery successively, described cable core comprises the FRP stirrup that is positioned at the center, a plurality of optical fiber bundle tubes unit that is arranged on FPR stirrup periphery, the vertical waterstop that encases described a plurality of optical fiber bundle tubes unit, described stranded layer is by some flexible FRP ropes stranded forming on the sheath periphery, and every described flexible FRP rope is made by ethene one acetate ethylene copolymer and fiber.

Further, every flexible FRP rope in the described stranded layer is bonding, the also bonding setting of described stranded layer and outer jacket.

Described stranded layer is at least one deck, and the direction of lay of adjacent two stranded layers is opposite.

Described stranded layer external application is pricked yarn and is fixed.

Described fiber is one or more in ultra high modulus polyethylene fibre, glass fibre, the aramid fiber.

Because technique scheme utilization, the utility model compared with prior art has following advantage: the utility model ADSS optical cable adopts the flexible FRP rope of being made by ethylene-vinyl acetate copolymer and fiber, replace traditional aramid yarn as the anti-element of opening, the flexible FRP rope of this kind can form stranded layer with regular stranded technology on optical cable, the uniform tension in order that keeps each root FRP rope easily, thereby make the ADSS optical cable when built on stilts laying, can bear big pulling force, have bigger practicality.

Description of drawings

Accompanying drawing 1 is existing ADSS cable configuration cut-open view;

Accompanying drawing 2 is the utility model cable configuration cut-open view;

Wherein: 1, cable core; 11, FRP stirrup; 12, optical fiber bundle tubes unit; 121, loose sleeve pipe; 122, optical fiber; 123, fine cream; 13, waterstop; 2, sheath; 3, stranded layer; 4, outer jacket;

1 ', cable core; 11 ', FRP stirrup; 12 ', optical fiber bundle tubes unit; 121 ', loose sleeve pipe; 122 ', optical fiber; 123 ', fine cream; 13 ', waterstop; 2 ', sheath; 3 ', stranded layer 4 ', outer jacket;

Embodiment

Below in conjunction with accompanying drawing, the utility model preferred embodiment is elaborated:

Optical cable as shown in Figure 1, it comprises cable core 1, is coated on sheath 2, stranded layer 3 and the outer jacket 4 of cable core 1 periphery successively.Wherein, cable core 1 is made of the FRP stirrup 11 that is positioned at the center, the waterstop 13 that is positioned at a plurality of optical fiber bundle tubes unit 12 of FRP stirrup 11 peripheries and wraps a plurality of optical fiber bundle tubes unit 12.The loose sleeve pipe 121 that each optical fiber bundle tubes unit 12 is made by the PBT material again, be arranged on the multi-core fiber 122 in the loose sleeve pipe 121 and the fine cream 123 that is filled between loose sleeve pipe 121 and the optical fiber 122 is formed; optical fiber 12 can be selected single mode or multimode optical fiber for use according to use occasion; fine cream 123 adopts the fine cream of thixotropy; thereby can play moistureproof and stress protective effect to optical fiber 122; prevent the static fatigue of optical fiber, guarantee the serviceable life of optical fiber.FRP or KRP rod that FRP stirrup 11 adopts glass fibre or aramid fiber to strengthen promptly are that typing forms as bonding agent with heat cured epoxy resin or unsaturated polyester resin, its its rigidity is arranged, the permission bending radius is bigger.

Sheath 2 adopts the PE protective cover material to make, and outer jacket 4 can adopt black polyethylene protective cover material or low-smoke halogen-free polyolefin protective cover material to make.Formation with strand layer 3 is elaborated below:

In the present embodiment, stranded layer 3 is combined by many flexible FRP ropes and forms, and described flexible FRP rope is to adopt thermoplasticity EVA resin as bonding agent, is that reinforcing material is made with ultra high modulus polyethylene fibre or glass fibre or aramid fiber, it is soft, is different from the FRP rod.

Particularly, the flexibility of FRP rope mainly embodies by the EVA resin, and the EVA resin is an ethylene-vinyl acetate copolymer, be by ethene (E) and vinyl acetate (VA) copolymerization and make, English name is: Ethylene Vinyl Acetate, abbreviate EVA as, and the characteristics of EVA resin are to have good flexibility, elasticity as the rubber, still can have pliability preferably under-50 ℃, the transparency and surface gloss property are good, and chemical stability is good, anti-aging and anti-ozone intensity is good, avirulence.Good with the miscibility of filler, painted good with processing and forming.It concerns very big with vinyl acetate content and molecular weight, melt index (MI).When melting index (MI) certain, when vinyl acetate (VA) content improves, its elasticity, flexibility, intermiscibility, the transparencys etc. are also along with improve.When VA content reduced, then performance approached tygon, and rigidity increases, and wearing quality, electrical insulating property improve.And traditional F RP rod is to form as bonding agent and fiber typing with heat cured epoxy resin or unsaturated polyester, and its rigidity is higher.

The utility model optical cable is owing to adopt flexible FRP rope, and it can be stranded in the sheath outer rim as strengthening element very easily as steel wire.The stranded layer external application of FRP rope is pricked the yarn (not shown) and is fixed.The direction of lay of pricking yarn is opposite with the direction of lay of FRP rope.

Because flexible FRP rope adopts thermoplasticity EVA plastics as bonding agent, so extrude in the process at cable jacket, between stranded FRP rope is adjacent, and FRP restricts and protective cover material between have to a certain degree adhesion, thereby increased the stability of cable configuration.

The utility model ADSS optical cable when specific design, should and give the optical cable weight of estimating according to required span, sag and meteorological condition, calculates the required optical cable pulling force that bears, thereby tries to achieve the diameter and the radical of flexible FRP rope, determines the external diameter of center beam tube again.When span is bigger, when meteorological condition was relatively poor, the radical of required FRP rope can adopt the opposite double-deck lay configuration of direction of lay to realize more for a long time.

The utility model adopts flexible FRP rope to replace traditional aramid yarn as stranded layer, has guaranteed that optical cable when built on stilts laying, can bear bigger pulling force, has stronger application value.

Claims

1. ADSS optical cable, comprise cable core (1), be coated on sheath (2), stranded layer (3) and the outer jacket (4) of cable core (1) periphery successively, described cable core (1) comprises the FRP stirrup (11) that is positioned at the center, a plurality of optical fiber bundle tubes unit (12) that is arranged on FPR stirrup (11) periphery, the vertical waterstop (13) that encases described a plurality of optical fiber bundle tubes unit (12), it is characterized in that: described stranded layer (3) is by some flexible FRP ropes stranded forming on sheath (2) periphery.

2. ADSS optical cable according to claim 1 is characterized in that: every flexible FRP rope in the described stranded layer (3) is bonding, described stranded layer (3) and the also bonding setting of outer jacket (4).

3. ADSS optical cable according to claim 1 and 2 is characterized in that: described stranded layer (3) is at least one deck, and the direction of lay of adjacent two stranded layers (3) is opposite.

4. ADSS optical cable according to claim 3 is characterized in that: described stranded layer (3) external application is pricked yarn and is fixed.

5. ADSS optical cable according to claim 1 is characterized in that: each described optical fiber bundle tubes unit (12) by loose sleeve pipe (121), be arranged on many single modes or multimode optical fibers (122) in the loose sleeve pipe (121) and be filled in loose sleeve pipe (121) with optical fiber (122) between thixotropy fibre cream (123) form.

6. ADSS optical cable according to claim 1 is characterized in that: described sheath (2) is made by the PE protective cover material, and described outer jacket (4) is made by black polyethylene protective cover material or low-smoke halogen-free polyolefin protective cover material.