CN210835374U

CN210835374U - High-strength access optical cable

Info

Publication number: CN210835374U
Application number: CN201922113779.9U
Authority: CN
Inventors: 王爱国
Original assignee: Shenzhen Sdgi Photoelectricity Technologies Co ltd
Current assignee: Shenzhen Sdgi Photoelectricity Technologies Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-23
Anticipated expiration: 2029-11-28

Abstract

The utility model provides a high strength access optical cable, including optic fibre, loose tube, glass fiber sleeve pipe and oversheath, wherein, loose tube parcel is in outside the optic fibre, glass fiber sleeve pipe parcel is in outside the loose tube, the oversheath parcel is in outside the glass fiber sleeve pipe. The utility model has the advantages that: the outer diameter is small, the consumed materials are less, and the cost is low; the construction cost is low; the lateral pressure resistance is good; the environmental resistance is good; has long optical fiber length and good tensile property.

Description

High-strength access optical cable

Technical Field

The utility model relates to an optical cable especially relates to a high strength inserts optical cable.

Background

The existing optical cable structure (non-backbone/trunk network) mainly comprises two types of loose-sleeve layer stranded structures and loose-sleeve central tube structures. The number of optical fiber cores is relatively large. If the number of the cores of the optical cable is to be small, some elements in the core of the optical cable are not necessary, such as the central strength member, the filler cord, the armor layer (if any), the sheath and the optical fiber loose tube of the loose tube type optical cable, the optical fiber loose tube of the loose tube type central tube type structure, the double strength member, the sheath, and the like. Especially, the optical cable structure is naturally enlarged much because the optical fiber loose tube is thick.

For the FTTx structure, several types of optical cables or cables are generally used, such as tight-buffered optical cables or cables, and the main structure thereof has three types: one is that the tight-buffered optical fiber is embedded into the reinforcement such as aramid yarn, and the reinforcement is coated with a layer of outer sheath; one is that the tight-buffered optical fiber is twisted and wound on a KFRP or FPR and other central reinforcing members and is arranged in an aramid yarn reinforcing layer, and a layer of outer sheath is coated outside the aramid yarn reinforcing layer; one is that the optical fiber is arranged in the center of the butterfly structure, the two sides of the butterfly structure are central reinforcing parts, and the optical fiber and the central reinforcing parts are both coated by an outer sheath. The three tight-sleeved optical cables have no extra cable length, the optical cables expand with heat and contract with cold when being subjected to external environment changes, and the contraction or stretching force generated by other materials is directly transmitted to the internal optical fibers, so that the transmission performance and the service life of the optical fibers are influenced.

The existing loose tube structure optical cable has the following defects: the outer diameter is large, the consumed materials are more, and the cost is high; the lateral pressure resistance is not good.

The existing tight-sleeved optical cable has the following defects: poor environmental resistance; the lateral pressure resistance is poor; no extra length of optical fiber and poor tensile property.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a high strength access optical cable.

The utility model provides a high strength access optical cable, including optic fibre, loose tube, glass fiber sleeve pipe and oversheath, wherein, loose tube parcel is in outside the optic fibre, glass fiber sleeve pipe parcel is in outside the loose tube, the oversheath parcel is in outside the glass fiber sleeve pipe.

As a further improvement of the utility model, a heat insulation layer is arranged between the loose tube and the glass fiber sleeve.

As a further improvement of the utility model, the loose tube is the oil-filled loose tube, the oil-filled loose tube forms the loose structure with its built-in optic fibre.

As a further improvement of the utility model, the oversheath is PE oversheath or PVC oversheath or PU oversheath.

The utility model has the advantages that: the outer diameter is small, the consumed materials are less, and the cost is low; the environmental resistance is good; has long optical fiber length and good tensile property.

Drawings

Fig. 1 is a schematic view of a high strength access optical cable of the present invention.

Detailed Description

The present invention will be further described with reference to the following description and embodiments.

As shown in fig. 1, a high-strength access optical cable includes an optical fiber 1, a loose tube 2, a glass fiber tube 4 and an outer sheath 5, wherein the loose tube 2 is wrapped outside the optical fiber 1, the glass fiber tube 4 is wrapped outside the loose tube 2, and the outer sheath 5 is wrapped outside the glass fiber tube 4.

As shown in fig. 1, a heat insulation layer 3 is arranged between the loose tube 2 and the glass fiber tube 4, the heat insulation layer 3 is used for protecting the loose tube 2, and the heat insulation layer 3 can prevent the loose tube 2 from softening and deforming because high temperature is generated when the glass fiber tube 4 is formed by baking.

As shown in fig. 1, the loose tube 2 is an oil-filled loose tube, and the oil-filled loose tube and the optical fiber 1 disposed therein form a loose tube structure.

The utility model provides a pair of high strength inserts optical cable, the manufacture process is: the optical fiber 1 is arranged in a loose tube 2, a heat insulation layer 3 is coated outside the oil-filled loose tube, a glass fiber band passes through a liquid vinyl resin mixed epoxy resin glue groove and passes through a shaping mold, so that the glass fiber band is directly adhered outside the loose tube to form the glass fiber tube 4 to form a similar FRP (fiber reinforced plastic) tube structure, and other materials such as PE (polyethylene), PVC (polyvinyl chloride), PU (polyurethane) and the like are coated outside the glass fiber tube 4 to form an outer sheath 5 of the optical cable.

The utility model provides a pair of high strength access optical cable, oil-filled loose sleeve pipe (like the PBT sleeve pipe) mainly form the loose cover structure rather than built-in optic fibre 1, and optic fibre 1 has the excess length, and when the optical cable was crooked, its built-in optic fibre 1 except receiving less bending stress can not receive other extrusion forces again. The expansion and contraction performance of the glass fiber is very close to that of the optical fiber, so that the structure has very good environment resistance. The heat insulation layer 3 wrapped outside the loose tube 2 is mainly used for preventing the loose tube 2 from softening and deforming, and further influencing the clearance of the optical fiber 1 in the optical fiber loose tube, so that the mechanical performance and the environmental resistance of the optical fiber are influenced.

The glass fiber material has the characteristics of light weight, high tensile strength and good insulating property, and the glass fiber sleeve 4 manufactured by the glass fiber material can be used as the main tension and side pressure resistant structure protection function of the optical cable, and has the advantages of water resistance, moisture resistance, stable structure and lower cost. The glass fiber is also a good corrosion-resistant material and has the rat bite-proof characteristic, and the comprehensive performance of the optical cable can be further enhanced due to the double functions of the glass fiber sleeve 4 and the PE outer sheath.

The utility model provides a pair of high strength inserts optical cable has following advantage:

1. the light weight, high strength, good resistance to environmental performance influences such as high and low temperature changes and the like;

2. the paint has good waterproof, moistureproof, ratproof and anticorrosion performances, and has better resistance to atmosphere, water, low-concentration acid, alkali, salt, various oils and solvents;

3. the optical fiber connector has good lateral pressure resistance and tensile resistance, has low requirements on optical access and wiring construction, and can use various connecting hardware fittings used conventionally;

4. the production process is simple and the cost is low.

The utility model provides a pair of high strength inserts optical cable uses materials such as optic fibre 1, oil-filled loose tube, insulating layer 3, glass fiber, designs an optical cable, has light, anti bending, anti side pressure, stretch-proofing strong performance outward, still has simple, the material quantity of manufacturing process is few, characteristics with low costs. And the optical cable can be made into a single-core or even a multi-core optical cable according to actual conditions so as to meet the increasingly developed network construction requirements. The optical cable can be used for non-backbone networks, FTTx, sparsely populated areas, or lines with less optical fiber quantity requirements, and can also be used for indoor optical fiber access and wiring, communication equipment in buildings, interconnection between switches and end users' equipment, and the like.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A high strength access optical cable, characterized in that: the optical fiber cable comprises an optical fiber, a loose tube, a glass fiber tube and an outer sheath, wherein the loose tube is wrapped outside the optical fiber, the glass fiber tube is wrapped outside the loose tube, and the outer sheath is wrapped outside the glass fiber tube.

2. The high strength access cable of claim 1, wherein: and a heat insulation layer is arranged between the loose sleeve and the glass fiber sleeve.

3. The high strength access cable of claim 1, wherein: the loose tube is an oil-filled loose tube, and the oil-filled loose tube and the optical fiber arranged in the oil-filled loose tube form a loose tube structure.

4. The high strength access cable of claim 1, wherein: the outer sheath is a PE outer sheath or a PVC outer sheath or a PU outer sheath.