CN206470451U - A kind of outdoor optical cable - Google Patents

Abstract

The utility model is related to a kind of outdoor optical cable, belongs to communication accessories technical field.It includes fibre ribbon, tension stress body, sheath and support line, in addition to interlayer；The interlayer is arranged between fibre ribbon；The Shore D hardness of the sheath is more than 55, and skin-friction coefficient is below 0.45；The minimum range L of the surface of the fibre ribbon to the outer surface of the sheath is L ＞ 0.3mm.The utility model can effectively prevent the oviposition behavior of bear cicada；The setting of otch contributes to the stripping of oversheath；Meanwhile, degree of safety of the fibre ribbon in stripping can be taken into account again, prevent from ensure that the stability that fibre ribbon transmits signal；Wire sheathing effectively can play shielding action to the junction of end of cable.

Description

A kind of outdoor optical cable

Technical field

The utility model is related to a kind of outdoor optical cable, belongs to communication accessories technical field.

Background technology

All the time, manufacture and use the various optical cables being made as follows：Have in glass optical fiber periphery by ultraviolet curing The optical fibre core of the clad of the property composition such as resin or thermosetting resin, makes the optical fibre core and a pair of tension members, Yi Jizhi Support line is fixed on defined position, while carrying out integral coating and forming sheath.As this optical fiber cord or optical cable, frequent quilt Referred to as leading in cable.

As the optical cable of leading in cable, by the sheath with neck by one or more single-core fiber cored wires or optical fiber belt carcass The optical fiber such as line, the tension member being made up of chevilled silk and aromatic polyamide resin etc. and support line integral coating are constituted.According to circumstances, Internal light etc. is taken out sometimes for destruction sheath is easy to, groove is also set on sheath.In addition, in existing optical cable, being Holding flame-retarding characteristic, ethene-(methyl) acrylic copolymer, ethene-(methyl) alkyl acrylate are selected from usually using one The resin of one or more of copolymer, ethylene-vinyl acetate copolymer is used as sheath material for the fire retardant polyolefin of main body.

When these optical cables make somebody a mere figurehead laying, the deterioration in characteristics that frequent producing cause is failed to understand sometimes.Gradually learn in recent years, its Reason is the cicada of summer generation, is particularly oviposition behavior of the bear cicada on optical cable.

Specifically, reason is that the optical cable of built on stilts laying is mistakenly considered trunk or branch by bear cicada, and production is penetrated on sheath Oviduct, and the behavior internally laid eggs.Like this on sheath insert tube for laying eggs when, optical fiber tube for laying eggs and damage, or become silted up The moisture such as water easily penetrate into cable interior from the hole of opening.Then, when moisture is penetrated into optical cable like this, the moisture causes The increased danger of transmission loss of optical fibre core is drastically raised.

If China Patent Publication No. is that " CN101611336A " discloses a kind of " optical cable ", " its at least have optical fibre core, The sheath of tension member and integral coating this lower optical fibre core and tension member, it is characterised in that the Shore D hardness of sheath is 55 More than, the minimum range L of surface to the outer surface of the sheath of the optical fibre core is L ＞ 0.3mm ".Due to Xiao of sheath Family name D hardness is big, and the tube for laying eggs of bear cicada is difficult to be pierced into sheath, along with the minimum of surface to the outer surface of sheath of optical fibre core Distance is more than 0.3mm, can almost entirely prevent optical fiber caused by the oviposition behavior of bear cicada to damage.

Although such scheme solves the problem of bear cicada lays eggs, but is due to the increase of Shore D hardness, again such that sheath Need the power applied bigger when peeling off and using, the damage of cored wire is easily caused when stripping sheath, so as to directly reduce The stability and integrality of optical cable transmission signal.

Utility model content

The purpose of this utility model is to overcome above shortcomings in the prior art, and providing a kind of can both prevent The spawning of bear cicada can be effectively peeled off outdoor optical cable of the sheath without damaging cored wire again.

The technical scheme in the invention for solving the above technical problem is：A kind of outdoor optical cable, fibre ribbon, tension stress Body, sheath and support line, the Shore D hardness of the sheath is more than 55, and skin-friction coefficient is below 0.45, the fibre ribbon The minimum range L of surface to the outer surface of the sheath be L ＞ 0.3mm, in addition to interlayer and braiding layer；The interlayer is set Between fibre ribbon；The wire sheathing winding parcel fibre ribbon and interlayer；The fibre ribbon includes some configuring side by side Optical fiber；The optical fiber includes fibre core, covering, clad one, clad two, dyed layer and outer jacket from inside to outside.

Shore D hardness is more than 55, and skin-friction coefficient is below 0.45, the surface of the fibre ribbon to the sheath The minimum range L of outer surface is L ＞ 0.3mm, and this three collaboration can almost entirely prevent the oviposition behavior of bear cicada.Meanwhile, Sandwich establishment between fibre ribbon, some plus-pressures or loading are applied when separation to fibre ribbon, are squeezed because interlayer absorbs this Pressure and loading, so fibre ribbon is separated in which can be barely affected from sheath；Furthermore, when taking out fibre ribbon, even if Some distortions are applied to fibre ribbon, because the distortion is absorbed, so as to stably be separated from sheath.

Wire sheathing winding parcel fibre ribbon and interlayer.By optical cable propagating optical signal, the optical signal is not by electromagnetic noise Influence.But, in the case of there is O/E converting members in the inside of the connector of end of cable, because optical signal has connector Electric signal is converted into, therefore, optical cable should set electro-magnetic screen layer to ensure signal transmission near the end of installs connector Stability.But, prior art is difficult that electro-magnetic screen layer is only set near the end of optical cable, therefore, in the total length model of optical cable In enclosing, in the peripheral coated metal braiding layer of fibre ribbon and interlayer, to reach the effect of shielding electromagnetism.

Further, the interlayer is aromatic polyester amine fibrous interlayer.

Further, the interlayer is Polyester band.

Further, the long side of the sheath is provided with otch one and otch two；The opening of the otch one is to quasi-fiber Band, the opening misalignment fibre ribbon of the otch two.

The utility model compared with prior art, with advantages below and effect：The utility model can effectively prevented The only oviposition behavior of bear cicada；The setting of otch contributes to the stripping of oversheath；Meanwhile, fibre ribbon can be taken into account again in stripping Degree of safety, prevent from ensure that fibre ribbon transmits the stability of signal；Wire sheathing can effectively to end of cable company Play shielding action in the place of connecing.

Brief description of the drawings

Fig. 1 is the utility model cross section structure schematic diagram.

Fig. 2 is band structure of optic fibre schematic diagram of the present utility model.

In accompanying drawing：1 is fibre ribbon, and 2 be tension stress body, and 3 be sheath, and 4 be support line, and 5 be optical fiber, and 6 be fibre core, and 7 be bag Layer, 8 be clad one, and 9 be clad two, and 10 be dyed layer, and 11 be outer jacket, and 12 be interlayer, and 13 be wire sheathing, and 14 are Otch one, 15 be otch two.

Embodiment

Below in conjunction with the accompanying drawings and the utility model is described in further detail by embodiment, following examples are pair It is of the present utility model explanation and the utility model is not limited to following examples.

Referring to Fig. 1-Fig. 2, the present embodiment includes fibre ribbon 1, tension stress body 2, sheath 3 and support line 4.

Fibre ribbon 1 is configured side by side as five optical fibers 5 and formed by by the integration of outer jacket 11.

Each optical fiber includes fibre core 6, covering 7, clad 1, clad 29 and dyed layer 10 from inside to outside.Wherein, wrap Layer 7 is formed by fluorine-containing uv-hardening resin etc., and clad 1 and clad 29 are by the ultraviolet of urethane acrylate class Line hardening resin is formed.In clad 1, Young's modulus relatively low (a few MPa) relatively barras is used；In clad 29 In, use Young's modulus higher (hundreds of to one thousand hundreds of MPa) harder resin.Dyed layer 10 can use addition pigment etc. And uv-hardening resin coloured etc. is formed, each optical fibre core can then be known by different color dyes according to its color Not each optical fibre core.

Also include interlayer 12 between fibre ribbon 1, interlayer 12 is spaced with fibre ribbon 1 and laid.Interlayer 12 is aromatic polyester amine Fibrous interlayer.The sandwich establishment 12 between fibre ribbon 1, some plus-pressures or loading are applied when separation to fibre ribbon, by The extruding force and loading are absorbed in interlayer 12, so fibre ribbon 1 is separated in which can be barely affected from sheath 3；Furthermore, When taking out fibre ribbon 1, even if applying some distortions to fibre ribbon 1, because the distortion is absorbed, so that stably from sheath 3 Separate.

Wire sheathing 13 is also enclosed with the outer ring of fibre ribbon 1 and interlayer 12, company that can effectively to end of cable Play shielding action in the place of connecing.

The Shore D hardness of sheath 3 is more than 55, and skin-friction coefficient is below 0.45, the surface of fibre ribbon 1 to the shield The minimum range L of the outer surface of set 3 is L ＞ 0.3mm.

A pair of notches 1 and two pairs of otch 2 15 are provided with the long side of sheath 3.The opening of otch 1 is to quasi-fiber Band 1, the opening misalignment fibre ribbon 1 of otch 2 15., can manual control internal optical fiber when peeling off oversheath 3 along otch 1 Expose quantity with 1, as needed selection.And when needing fibre ribbon 1 being all stripped out, then can be by fastening otch two 15 pull to make otch 1 split to both sides, so as to effectively all peel off fibre ribbon 1.

Although the utility model is disclosed as above with embodiment, it is not limited to protection model of the present utility model Enclose, any technical staff for being familiar with this technology is not departing from the change made in spirit and scope of the present utility model and profit Decorations, all should belong to protection domain of the present utility model.

Claims (4)

1. a kind of outdoor optical cable, including fibre ribbon, tension stress body, sheath and support line, the Shore D hardness of the sheath 55 with On, skin-friction coefficient is below 0.45, and the minimum range L of surface to the outer surface of the sheath of the fibre ribbon is L ＞ 0.3mm, it is characterised in that：Also include interlayer and wire sheathing；The interlayer is arranged between fibre ribbon；It is described metal knitted Layer winding parcel fibre ribbon and interlayer；The fibre ribbon includes some optical fiber configured side by side；The optical fiber includes from inside to outside Fibre core, covering, clad one, clad two, dyed layer and outer jacket.

2. outdoor optical cable according to claim 1, it is characterised in that：The interlayer is aromatic polyester amine fibrous interlayer.

3. outdoor optical cable according to claim 1, it is characterised in that：The interlayer is Polyester band.

4. outdoor optical cable according to claim 1, it is characterised in that：The long side of the sheath is provided with otch one and otch Two；The opening alignment fibre ribbon of the otch one, the opening misalignment fibre ribbon of the otch two.