CN2798117Y - Short span full medium self-supporting optical cable - Google Patents

Abstract

A short span full medium self-supporting optical cable relates to a communication optical cable. The major technical characteristics are the exterior of a cable core has no an inner sheath but is directly and vertically wrapped with a layer of non-woven fabric whose exterior is fixed by a bandage and whose thickness is 0.1-0.15 mm; the optical fiber in the beam tube of the optical cable is longer than the beam tube and the residue length is 1.3-1.5/1000 and the stranding pitch or stranding angle of the beam tube is 70-80 mm/10 pi. The utility model removes the inner sheath on the exterior of the original cable core and replaces the inner sheath with the non-woven fabric of lightweight, which not only reduces the manufacturing cost of the optical cable by about 10%-15% but also reduces the load by 10%. And the abrasion of the optical cable and the sag of the installation that are caused by the sway of the wind force are reduced and the failure rate that is possibly caused by the impact or the friction between the optical cable and pole towers, trees and buildings.

Description

Short span All Dielectric self-support

Technical field:

The utility model relates to a kind of communications optical cable, especially relates to being applicable to (the transmission line of electricity of the general span≤100m) improvement of employed ADSS cable configuration of communicating by letter of short span.

Background technology:

Be used for transmission line of electricity and communicate by letter employed ADSS optical cable installation at the high voltage transmission line shaft tower, so characteristics such as optical cable itself should have in light weight, anti-vibration, is not subjected to electromagnetic interference (EMI), tensile strength is big, be easy to lay.To being used for the transmission line of electricity employed ADSS optical cable of communicating by letter, require that advantages of higher tensile strength is arranged, in light weight, multinomial performance such as the line footpath is little.There is sheath (as Fig. 2) in existing short span ADSS optical cable, and optic cable diameter is bigger than normal, weight lays particular stress on, and optical cable operation apoplexy is carried, iced and carries greatlyyer, to the having relatively high expectations of optical cable tensile strength, has also caused the waste of material simultaneously.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned shortcoming and provides that a kind of cable outer diameter is less, weight is lighter, the short span All Dielectric self-support of the load that not only reduced production costs but also reduced.

The utility model is achieved by the following technical solution: this weak point span All Dielectric self-support, comprise optical fiber, gasket for packing, loose sleeve pipe, fine cream, cable cream, loose sleeve pipe, aramid yarn, sheath, its major technique feature is that cable core does not have inner sheath outward, but directly vertical bag layer of non-woven fabric, nonwoven fabrics external application band is fixed, and nonwoven thickness is 0.1-0.15mm; Optical fiber in the fiber optic cable loose tube is longer than beam tube, and surplus length is 1.3-1.5 ‰, and beam tube twisting pitch/stranding angle is 70-80mm/10 л.

The utility model has removed the outer inner sheath of former cable core, and replaces with the nonwoven fabrics of lightweight, has both reduced about 10%-15% optical cable manufacturing cost; Reduced about 10% load again; Also reduce wind-force and waved the wearing and tearing of optical cable and sag is installed, reduced the failure rate that optical cable and shaft tower, trees, buildings bump or friction may cause.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of the ADSS optical cable of original sheath.

Embodiment:

As shown in Figure 1, cable core adopts 1+6 structure 30 cores, promptly form by 5 beam tubes (6 core/pipe)+1 gasket for packing 9 and a central reinforce member 10, central reinforce member is fibre reinforced plastics rod FRP, its elastic modulus is 50Gpa, diameter 2.1mm, hold 6 optical fiber 1 in the every beam tube, the beam tube periphery is a PBT pine sleeve pipe 2, the fine cream 3 of filled composite has filled composite cable cream 4 in the pipe in the cable core, and the surplus length of beam tube inner fiber is 1.3-1.5 ‰, beam tube takes SZ stranded in the cable core, and twisting pitch/stranding angle is 70-80mm/10 л.Cable core does not have inner sheath outward, directly vertical bag layer of non-woven fabric 5, and nonwoven fabrics external application band is fixed, and nonwoven thickness is 0.1-0.15mm.It is PE or AT sheath 7 that the nonwoven fabrics skin has aramid yarn 6, oversheath successively.

The utility model adopts fine pith simultaneously because excess fiber length is reasonable, makes optical cable when high cold operation, and every performance is normal; Because cable core has omitted inner sheath outward, reduce about 10% load again, also reduced about 10%-15% optical cable manufacturing cost.

Claims (2)

1, a kind of short span All Dielectric self-support, comprise optical fiber, gasket for packing, loose sleeve pipe, fine cream, cable cream, loose sleeve pipe, aramid yarn, sheath, it is characterized in that cable core does not have inner sheath outward, but directly vertical bag layer of non-woven fabric, nonwoven fabrics external application band is fixed, and nonwoven thickness is 0.1-0.15mm.

2, a kind of short span All Dielectric self-support as claimed in claim 1 is characterized in that the optical fiber in the beam tube is longer than beam tube, and surplus length is 1.3-1.5 ‰, and beam tube twisting pitch/stranding angle is 70-80mm/10 π.

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