CN208140991U - A kind of outdoor leading in cable of FTTH - Google Patents

Abstract

The utility model relates to a kind of outdoor leading in cables of FTTH, including tight tube fiber [1], strapping [2], water-proofing powder [3], non-metallic stiffener [4] and oversheath [5], tight tube fiber [1] described in several is tied up by two strappings [2] in positive counter-clockwise direction spiral shape and gap water-proofing powder [3] filling between the tight tube fiber [1] forms cable core, the non-metallic stiffener [4] is longitudinally laid in the surrounding of cable core, coat the oversheath [5] again outside in the non-metallic stiffener [4].By the above-mentioned means, the beneficial effects of the utility model are：Tensile strength is strong, light-weight, diameter is small, it is flexible, facilitate connector at end operation, fire protection flame retarding waterproof, be the ideal outdoor leading in cable to building in a kind of FTTH engineering.

Description

A kind of outdoor leading in cable of FTTH

Technical field

The utility model relates to a kind of optical cables, fiber-to-the-home for FTTH in optical communication network more particularly, to one kind The leading in cable in building is arrived in outdoor.

Background technique

Existing FTTH uses the structure of optical fiber loose tube ointment filling with the outdoor leading in cable overwhelming majority, if that is, Dry root colored optical fiber is extruded in plastic optical fibre drivepipe, and the gap between optical fiber and casing is filled with the fiber paste of gel state, fiber paste Effect first is that block water, after preventing cable jacket and ferrule from damaging or enter ferrule from end face water and optical fiber caused to pass The deterioration of defeated performance, the effect of fiber paste are prevented second is that make the lubrication between optical fiber and optical fiber, between optical fiber and ferrule tube wall Only wriggling rubs mutually of the optical fiber in ferrule causes the damage of optical fiber, but the fiber paste of gel state is constructed to fiber cable joint Also harm is brought, harm can be carried out connecing for FIBER OPTIC FIBERS & CABLE first is that construction personnel must remove fiber paste just before fiber cable joint Head, the harm of fiber paste is second is that fiber paste easy drip at 50 DEG C or more, causes the accumulation for having fiber paste in cable splice closure, cause The functional reliability of cable splice closure reduces, and the harm of fiber paste is third is that inflammable, because the main component of fiber paste is hydrocarbon oil esterification Object is closed, is combustible material, inflammable optical cable is laid in building not to be allowed；Existing FTTH is also existed with outdoor leading in cable The outside of ferrule is equipped with stiffener and oversheath, and stiffener generally uses steel wire and steel band, leads to the weight of optical cable Weight, cable outer diameter is big, not flexible；Existing FTTH is also also filled with gel with outdoor leading in cable between ferrule The cable cream of state, also plays waterproof, and disadvantage is also identical as fiber paste.

Summary of the invention

In order to overcome drawbacks described above, the utility model provides a kind of outdoor leading in cable of FTTH, and tensile property is strong, Fire-retardant fireproof, waterproof, outer diameter are small, light-weight, flexible, are the ideal outdoor introducing light to building in a kind of FTTH engineering Cable.

Technical solution adopted by the utility model to solve its technical problems is：A kind of outdoor leading in cable of FTTH, by Tight tube fiber, strapping, water-proofing powder, non-metallic stiffener and oversheath composition, the tight tube fiber is in 250 μ of diameter Ф The fiber unit that one layer of diameter is formed for the fixed material of 0.9mm, several institutes are tightly coated on the quartzy bare fibre of m The tight tube fiber stated strapping described in two is tied up in positive counter-clockwise direction spiral shape and between the tight tube fiber Gap is filled to form cable core with the water-proofing powder, and the surrounding of cable core lays the non-metallic stiffener longitudinally to mention The stretching resistance performance of high optical cable, the oversheath are coated on the outermost sheath of optical cable except non-metallic stiffener, with into One step protects optical cable core.

As advanced optimizing for the utility model, tight tube fiber described in several is not straight described in parallel Strapping be bundled into cable core, but be in left-and-right spiral state, referred to as SZ is twisted, and SZ twisting pitch is 80cm~100cm, twists Closing windup-degree is 360 °.

As advanced optimizing for the utility model, fixed material polyvinyl chloride (PVC) on the tight tube fiber, One of materials such as nylon (Nylon), polyethylene (PE) or polypropylene (PP).

As advanced optimizing for the utility model, the material of the strapping is Polyester Yarns, and tying up power cannot be too Greatly, to prevent that optical fiber is made to be influenced transmission performance by pressure.

As advanced optimizing for the utility model, the water-proofing powder uses crosslinked polyacrylate class expanding powder, in case of More than ten times or even tens times of volume expansion after water, can effectively block trickling of the water in cable core.

As advanced optimizing for the utility model, the non-metallic stiffener uses aramid fiber yarn, aramid fiber Yarn tensile strength is high, high temperature resistant and fire-retardant, and the specification of every aramid fiber yarn is 1000D, it can bear the pulling force of 200N, with 6 Aramid fiber yarn described in~12 is uniformly disposed longitudinally on the surrounding of the cable core, such optical cable can bear 1200N~ The pulling force of 2400N.

As advanced optimizing for the utility model, oversheath is with black high density polyethylene (HDPE) (HDPE).

The utility model has the beneficial effects that：Tensile strength is strong, light-weight, diameter is small, it is flexible, facilitate connector Cheng Duancao Make, fire protection flame retarding waterproof, is the ideal outdoor leading in cable to building in a kind of FTTH engineering.

Detailed description of the invention

Fig. 1 is the cross-sectional structure schematic diagram of the utility model.

Fig. 2 is that the tight tube fiber SZ of the utility model twists schematic diagram.

In figure：1, tight tube fiber, 2, strapping, 3, water-proofing powder, 4, non-metallic stiffener, 5, oversheath, 6, SZ it is twisted Pitch

Specific embodiment

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments：

The outdoor leading in cable of a kind of FTTH as shown in Figure 1, including it is tight tube fiber 1, strapping 2, water-proofing powder 3, nonmetallic Stiffener 4 and oversheath 5, tight tube fiber 1 described in several are tied by two strappings 2 in positive counter-clockwise direction spiral shape It pricks and the filling of gap water-proofing powder 3 between the tight tube fiber 1 forms cable core, longitudinally laid in the surrounding of cable core described Non-metallic stiffener 4, coat the oversheath 5 again outside the non-metallic stiffener 4.

Further, tight tube fiber 1 described in several is not to tie up stranding by the strapping 2 in parallel straight Core, but be in left-and-right spiral state, referred to as SZ is twisted, and SZ twisting pitch 6 is 80cm~100cm, and twisted windup-degree is 360 °, as shown in Figure 2.

Further, fixed material polyvinyl chloride (PVC), nylon (Nylon), poly- second used in the tight tube fiber 1 One of materials such as alkene (PE) and polypropylene (PP).

Further, described Polyester Yarns of strapping 2 etc., tying up power cannot be too big, with prevent from making optical fiber by pressure shadow Ring transmission performance.

Further, the water-proofing powder 3 uses crosslinked polyacrylate class expanding powder.

Further, the non-metallic stiffener 4 uses aramid fiber yarn, and the specification of every aramid fiber is 1000D, 6~12 aramid fiber yarns of size of every optical cable view cable core diameter, uniformly longitudinal direction cloth is placed on the surrounding of cable core.

Further, the oversheath 5 uses high-density polyethylene plastics.

It is emphasized that：The above is only the preferred embodiment of the present utility model, not appoints to the utility model What formal limitation, any simple modification made by the above technical examples according to the technical essence of the present invention, etc. With variation and modification, it is still within the scope of the technical solutions of the present invention.

Claims (6)

1. a kind of outdoor leading in cable of FTTH, it is characterized in that：Including tight tube fiber (1), strapping (2), water-proofing powder (3), non- Metal strength members (4) and oversheath (5), tight tube fiber (1) described in several is by two strappings (2) just square counterclockwise It is tied up to spiral shape and gap water-proofing powder (3) filling between the tight tube fiber (1) forms cable core, in the surrounding of cable core Longitudinal direction lays the non-metallic stiffener (4), coats the oversheath again outside in the non-metallic stiffener (4) (5)。

2. a kind of outdoor leading in cable of FTTH according to claim 1, it is characterized in that：Tight tube fiber described in several (1) it is not tied band (2) in parallel not instead of straight and is bundled into cable core, be in left-and-right spiral state, referred to as SZ is twisted, the twisted section of SZ It is 80cm~100cm away from (6), being twisted windup-degree is 360 °.

3. a kind of outdoor leading in cable of FTTH according to claim 1, it is characterized in that：On the tight tube fiber (1) One of materials such as fixed material polyvinyl chloride (PVC), nylon (Nylon), polyethylene (PE) or polypropylene (PP).

4. a kind of outdoor leading in cable of FTTH according to claim 1, it is characterized in that：The material of the strapping (2) Material is Polyester Yarns.

5. a kind of outdoor leading in cable of FTTH according to claim 1, it is characterized in that：The water-proofing powder (3) is using friendship Join polyacrylate expanding powder.

6. a kind of outdoor leading in cable of FTTH according to claim 1, it is characterized in that：The non-metallic stiffener (4) aramid fiber yarn is used, the specification of every aramid fiber yarn is 1000D, and the aramid fiber yarn described in 6~12 is uniformly indulged To the surrounding that the cable core is arranged in.