CN209765122U

CN209765122U - Impact-resistant direct-buried optical cable

Info

Publication number: CN209765122U
Application number: CN201920798393.3U
Authority: CN
Inventors: 叶建胜; 李国帅; 朱晖; 刘小兵; 刘步勇
Original assignee: Jiangsu Hua Mai Optoelectronic Technology Co Ltd
Current assignee: Jiangsu Hua Mai Optoelectronic Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2019-12-10
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses an impact-resistant direct-burried optical cable, include the reinforcement by the preparation of glass fiber stick, be provided with 2 ~ 6 sleeve pipes around the reinforcement, the intraductal non-dispersion displacement single mode fiber optical fiber that sets up 1 ~ 12 of cover, the sheathed tube outside is inner sheath and oversheath in proper order, and both structures as an organic whole of inner sheath and oversheath to be provided with a plurality of cavitys between inner sheath and the oversheath, the inside packing of cavity has the polyurethane foamer as buffer material, the beneficial effects of the utility model reside in that show the impact resistance who improves the optical cable.

Description

Impact-resistant direct-buried optical cable

Technical Field

The utility model relates to an optical cable especially relates to an impact-resistant direct-burried optical cable, belongs to communications facilities technical field.

Background

With the development of optical communication technology and the rapid development of optical cable industry, a direct-buried optical cable is an optical cable directly buried underground, and the optical cable not only requires to maintain the transmission characteristic and long-term stability of the optical cable, but also has the performance of resisting external mechanical damage, so the direct-buried optical cable is often armored by steel belts or steel wires, which causes the dead weight of the optical cable to be large and the laying to be inconvenient. When the direct-buried optical cable laying facility is in working hours and in the construction process, the direct-buried optical cable laying facility may be subjected to rolling impact of heavy objects such as vehicles and the like, so that the optical cable is damaged. Therefore, the development of the impact-resistant direct-buried optical cable with light weight is expected, so that the production cost is reduced, the construction difficulty is reduced, and the construction efficiency is improved.

Patent publication No. CN108614336A discloses a bundle-shaped impact-resistant optical cable, in which a plurality of cavities are provided in a protective sheath corresponding to the contact position between an optical fiber and the protective sheath along the longitudinal direction of the optical cable. When the optical cable is impacted by the outside, the cavity is compressed, so that the effects of buffering and absorbing impact force can be achieved, and the pressure cannot be directly applied to the optical fiber, so that the optical fiber is protected.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides an impact-resistant direct-buried optical cable can bear the impact of rolling by heavy objects such as vehicles.

In order to achieve the purpose of the invention, the utility model adopts the following technical scheme:

An impact-resistant directly-buried optical cable comprises a reinforcing member made of a glass fiber rod, wherein 2 ~ 6 sleeves are arranged around the reinforcing member, 1 ~ 12 non-dispersion displacement single-mode optical fiber is arranged in each sleeve, an inner sheath and an outer sheath are sequentially arranged on the outer sides of the sleeves, the inner sheath and the outer sheath are of an integrated structure, a plurality of cavities are arranged between the inner sheath and the outer sheath, and polyurethane foaming agents are filled in the cavities to serve as buffer materials.

preferably, the polyurethane foaming agent is flame-retardant.

Preferably, the cavities are irregularly arranged.

Preferably, the outer sheath is provided with 4 ~ 8 steel wires evenly distributed along the length direction to form a steel wire anti-collision layer.

Preferably, a ceramic fiber braided layer is filled between the sleeve and the inner sheath.

Preferably, the material of the sleeve is polybutylene terephthalate.

The beneficial effects of the utility model reside in that, showing the impact resistance who has improved the optical cable.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

An impact-resistant buried optical cable 100 comprises a reinforcing member 104 made of a glass fiber rod, wherein the glass fiber is characterized by good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, the reinforcing member 104 made of the glass fiber rod can obviously improve the mechanical performance of the optical cable and can reduce the weight of the reinforcing member so as to reduce the self weight of the optical cable 100, a plurality of sleeves 105 are arranged around the reinforcing member 104, the number of the sleeves 105 is generally 2 ~ 6, 1 ~ 12 optical fibers 106 are arranged in each sleeve 105, the optical fibers 106 are non-dispersion displacement single-mode optical fibers, an inner sheath 102 and an outer sheath 101 are sequentially arranged outside the sleeves 105, the inner sheath 102 and the outer sheath 101 are of an integral structure, a plurality of cavities 103 are arranged between the inner sheath 102 and the outer sheath 101, the cavities 103 can obviously improve the impact resistance of the optical cable, in addition, a buffer material 107 is filled in the cavities 103, and the cavities 103 can be regularly arranged or irregularly arranged as seen from the length direction of the optical cable.

In the embodiment, the buffer material is a polyurethane foaming agent, and the physical forms of the polyurethane foaming agent are solidified foams within the temperature range of-10 ℃ to ~ 80 ℃, so that the good elasticity and bonding force can be kept.

In this embodiment, the material of the inner sheath 102 and the outer sheath 101 is thermoplastic polyester elastomer (TPEE), which has elasticity of rubber and strength of engineering plastics; the soft segment imparts elasticity to it, making it rubber-like; the hard segment imparts processability to it, making it plastic-like; compared with rubber, the rubber has better processing performance and longer service life; compared with engineering plastics, the cable core has high strength, better flexibility and dynamic mechanical property, thereby being more beneficial to dispersing and consuming external impact to protect the internal cable core.

In this embodiment, the outer sheath 101 is provided with 4 ~ 8 steel wires 109 along the length direction in an evenly distributed manner, so as to form a steel wire anti-collision layer, thereby increasing the shock resistance of the optical cable and increasing the mechanical properties of the optical cable such as stretching, flattening and the like.

In this embodiment, the ceramic fiber braid 108 is filled between the sleeve 105 and the inner sheath 102, which further improves the strength of the optical cable. The material of the sleeve 105 is selected from polybutylene terephthalate (PBT).

Claims

1. An impact-resistant directly-buried optical cable is characterized by comprising a reinforcing member made of a glass fiber rod, wherein 2 ~ 6 sleeves are arranged around the reinforcing member, 1 ~ 12 non-dispersive displacement single-mode optical fiber fibers are arranged in the sleeves, an inner sheath and an outer sheath are sequentially arranged outside the sleeves, the inner sheath and the outer sheath are of an integrated structure, a plurality of cavities are arranged between the inner sheath and the outer sheath, and a polyurethane foaming agent is filled in the cavities to serve as a buffer material.

2. The impact-resistant buried optical cable according to claim 1, wherein said polyurethane foaming agent is flame retardant.

3. The impact-resistant buried optical cable of claim 1, wherein said cavities are irregularly arranged.

4. The impact-resistant buried optical cable of claim 1, wherein said outer sheath is provided with 4 ~ 8 steel wires distributed evenly along the length direction to form a steel wire anti-collision layer.

5. The impact-resistant buried optical cable according to claim 1, wherein a ceramic fiber braid is filled between the sleeve and the inner sheath.

6. The impact-resistant buried optical cable according to claim 1, wherein the material of said sleeve is polybutylene terephthalate.