CN2653529Y - Water line optic cable - Google Patents

Abstract

The utility model discloses an innovated fiber optic cable structure used in wetlands, slope fields and underwater. The optical fiber inside a beam tube is longer than the beam tube by one to one point five in thousand. The beam tube forms a SZ strand and the stranding pitch or stranding angle is by dividing seventy millimeters to eighty millimeters with eight Pis. Second internal sheath is a high density polyethylene(HDPE) with a thickness of one point two millimeters. An armored layer consists of twenty four steel wires and the diameter of each steel wire is one point seventy five to one point eighty five millimeters. A nominal tensile strength adopts eighty hundred and fifty MPa. The internal part of a first internal sheath has a water proof strap, the external part of which is rolled with a steel and plastic compound belt with winkles. Because the residue length of the optical fiber and the pitch are reasonable, when under high temperature and lower temperature environments, the optical fiber wire can run steadily and the second internal sheath ensures that the optical fiber wire does not bear lateral pressure under a certain outer force and the sheathing intensity meets the requirement on tension resistance.

Description

Water line optic cable

Technical field

The utility model relates to a kind of communications optical cable, especially relates to the improvement of the cable configuration that is applicable to swampland, slope land and uses under water.

Background technology

Be used for long-distance optical cable and be embedded in underground usually or set up in the air, so optical cable itself should have good protection against the tide, waterproof, tensile property, to being used for mountain region, hillside fields and optical cable marshy, more requires to have multinomial performances such as higher tension, lateral pressure resistant.Problems such as the Water line optic cable of prior art exists optical fiber excess length less than normal, and pitch is short partially make optical cable fluctuation of service when high temperature, occur transmission fault when low temperature, and second sheath is thick partially simultaneously, makes side pressure excessive, has also caused the waste of material.

Summary of the invention

The utility model mainly is to solve existing in prior technology: its optical fiber excess length of Water line optic cable is less than normal, and pitch is bigger than normal, makes the optical cable fluctuation of service, and second sheath is thick partially simultaneously, and cable outer diameter is bigger, makes the excessive and optical cable tensile property deficiency of side pressure.

Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: the optical fiber in the beam tube is longer than beam tube, and surplus length is 1.0-1.5 ‰; It is stranded that beam tube forms SZ, and twisting pitch/stranding angle is 70mm-80mm/8 π; Second inner sheath is high density polyethylene (HDPE), and thickness is 1.2mm.

As preferably, armor is made up of 24 steel wires, and every gauge of wire is 1.75mm-1.85mm, is preferably 1.8mm; First inner sheath is inside and outside waterstop, has outward and rolls composite steel-plastic belt wrinkly on the steel foil.

Because its optical fiber excess length of the utility model and pitch design are reasonable, make optical cable stable when high ambient temperature or low temperature, second inner sheath has guaranteed that optical cable its cable core under certain external force is not subjected to wall pressure, and armouring intensity satisfies the tension requirement.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the present utility model.

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is further described in detail.

Embodiment: as shown in Figure 1, cable core adopts the 1+6 structure, and promptly by 4 beam tube+2 gasket for packings and a central reinforce member, the present embodiment central reinforce member is a phosphatization steel wire 7, nominal tensile strength 1570MPa, diameter 2.1mm; Hold 4 optical fiber in the every beam tube, the surplus length of beam tube 5 inner fibers is 1.0-1.5 ‰, and beam tube 5 takes SZ stranded in the cable core, twisting pitch/stranding angle is 70-80mm/8 π, and the utility model adopts fine pith simultaneously because excess fiber length is reasonable, make optical cable when high cold operation, parameter is normal; First inner sheath 6 is inside and outside waterstop, have outward and roll composite steel-plastic belt 1 wrinkly on the steel foil, it is protective cover material that second inner sheath 3 adopts the high density polyethylene (HDPE) of excellent performance, thickness is 1.2mm, guaranteed optical cable under certain external force, the cable core of optical cable is not subjected to wall pressure, and armouring wire 2 is selected 24 every diameter 1.8mm, nominal tensile strength 850MPa for use, make optical cable satisfy the needs of tensile resistence, 4 is oversheath.

The utility model is particularly suitable for GYTY _55-3316B ₁The type Water line optic cable.

Claims (2)

1. a Water line optic cable has cable core, beam tube, water barrier, sheath and armouring, it is characterized in that:

A. the optical fiber in the beam tube (5) is longer than beam tube, and surplus length is 1.0-1.5 ‰;

B. it is stranded that beam tube (5) forms SZ, and twisting pitch/stranding angle is 70-80mm/8 π;

C. second inner sheath (3) is high density polyethylene (HDPE), and thickness is 1.2mm.

2. Water line optic cable according to claim 1 is characterized in that:

A. armor is made up of 24 steel wires (2), and every gauge of wire is 1.75-1.85mm, is preferably 1.8mm;

B. first inner sheath (6) is inside and outside a waterstop, has outward and rolls composite steel-plastic belt wrinkly (1) on the steel foil.

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