CN219496761U - Optical fiber intensive ultra-soft microbeam tube optical cable - Google Patents

Abstract

The utility model relates to the technical field of optical cables for communication, in particular to an optical fiber intensive ultra-soft microbeam tube optical cable. The technical proposal comprises: the optical fiber dense ultra-soft microbeam tube optical cable comprises a layer stranded cable core and a sheath, wherein the layer stranded cable core comprises a plurality of miniature loose tubes, a plurality of UV optical fibers are arranged in the miniature loose tubes, water-blocking fiber paste is filled in the miniature loose tubes, and water-blocking yarns are arranged on the outer sides of the miniature loose tubes; the sheath comprises a glass fiber band and an outer protective layer which are fixedly connected; the inner side of the glass fiber tape is fixedly connected with water-blocking aramid yarns; the cable core is provided with a miniature loose tube in the center, replaces the traditional metal or nonmetal reinforcing element, ensures that the whole optical cable has good flexibility, is suitable for winding and unwinding of small-diameter reels, and has good bending performance.

Description

Optical fiber intensive ultra-soft microbeam tube optical cable

Technical Field

The utility model relates to the technical field of optical cables for communication, in particular to an optical fiber intensive ultra-soft microbeam tube optical cable.

Background

The investment and achievement of the optical communication industry are seen, and industry development needs more optical fibers, so that improvements on laying methods, construction modes and redesign of novel optical cables are seen.

In the prior art, in order to increase the strength, the center of the optical cable is provided with a steel wire, but the structure makes the flexibility of the optical cable very poor, and the current production requirement cannot be met.

Disclosure of Invention

The utility model aims to provide an optical fiber intensive ultra-flexible microbeam tube optical cable for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the optical fiber dense ultra-soft microbeam tube optical cable comprises a layer stranded cable core and a sheath, wherein the layer stranded cable core comprises a plurality of miniature loose tubes, a plurality of UV optical fibers are arranged in the miniature loose tubes, water-blocking fiber paste is filled in the miniature loose tubes, and water-blocking yarns are arranged on the outer sides of the miniature loose tubes;

the sheath comprises a glass fiber band and an outer protective layer which are fixedly connected; the inner side of the glass fiber belt is fixedly connected with water-blocking aramid yarns.

Preferably, the number of the micro loose tubes is an odd number of 7 and above.

Preferably, the number of the UV optical fibers is 12 or more.

Preferably, the water-blocking fiber paste is thixotropic water-blocking fiber paste.

Preferably, the micro loose tube is made of PBT plastic, the outer diameter of the micro loose tube is controlled to be 1.5 plus or minus 0.05mm, and the wall thickness is controlled to be 0.22 plus or minus 0.03mm.

Compared with the prior art, the utility model has the beneficial effects that: the cable core is provided with a miniature loose tube in the center, and replaces the traditional metal or nonmetal reinforcing element, so that the whole optical cable has good flexibility, is suitable for being wound and unwound by a small-diameter disk, and has good bending performance;

the optical fiber density is high, the outer diameter is small, a miniature loose tube design is adopted, the single tube is 12 cores, the tube diameter is 1.5mm, the single tube fiber containing capacity is improved to the greatest extent, so to speak, the minimum optical cable outer diameter is used for making the maximum optical fiber containing capacity, and of course, more than 12 cores, such as 24 cores, of the single tube can be designed according to the needs, and the tube diameter is controlled to be 1.9mm;

the all-medium optical cable structure has the advantages that the optical cable omits a central reinforcement steel wire and a metal belt, and adopts the process design of longitudinally coating the glass fiber belt, so that the optical cable has good lightning protection and corrosion resistance;

the semi-dry type structure is characterized in that the optical cable does not use water-blocking ointment, so that the environment pollution caused by wiping and dripping of the traditional optical cable ointment in the construction and use processes is effectively avoided, and the optical cable has excellent environment-friendly performance.

Drawings

Fig. 1 is a schematic cross-sectional structure of an embodiment of the optical cable of the present patent.

In the figure: 1. the UV optical fiber, the waterproof fiber paste 3, the miniature loose tube 4, the waterproof yarn 5, the waterproof aramid yarn 6, the glass fiber belt 7 and the outer protective layer.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

As shown in figure 1, the optical fiber dense ultra-flexible microbeam tube optical cable comprises a layer stranded cable core and a sheath, wherein the layer stranded cable core is formed by 7 micro loose tubes 3 in total, compared with the traditional cable core, in order to improve the fiber capacity and flexibility of the cable core, a central reinforcing member steel wire is replaced by a micro loose tube 3 with the same pipe diameter, 12 or more UV optical fibers 1 are arranged in each micro loose tube 3, thixotropic water-blocking fiber paste 2 is filled in the tube to play a role in water blocking and buffering, the micro loose tube 3 is made of PBT plastic, has lower thermal shrinkage rate and anti-hydrolysis performance, protects the UV optical fibers 1 from being extruded by external force to generate stress, the outer diameter of the micro loose tube 3 is controlled to be 1.5+/-0.05 mm, the wall thickness is 0.22+/-0.03 mm, in the process of manufacturing the cable core, an SZ stranded twisting mode is adopted, the relative spiral has high speed and a reversing point to provide a stretching window for the optical cable, the tensile property of the optical cable is improved, but in order to stabilize the cable core structure, two-way fixing of the binding yarn is needed, due to the fact that the outer diameter and the wall thickness of the loose tube are relatively small, the problem of heat shrinkage inevitably exists in the traditional polyester binding yarn due to the fact that the material reason is considered, after the sheath passes through the high Wen Jitou, the generated high-temperature shrinkage extremely easily binds the miniature loose tube 3 to cause the stress of the optical fiber in the tube to generate great attenuation, in order to solve the problem, the waterproof aramid yarn 5 is adopted to replace the traditional polyester binding yarn, due to the extremely excellent heat stability of the aramid material, after the sheath passes through the high Wen Jitou, the problem of binding flat deformation of the miniature loose tube 3 is avoided due to the fact that the heat shrinkage phenomenon does not exist, the optical property of the ultraviolet optical fiber 1 in the tube is guaranteed, in addition, the waterproof aramid yarn 5 has the waterproof property, the work such as recharging of the cable core is omitted, and the ointment is clean, in order to ensure the full section of the optical cable not to permeate water, a water blocking yarn 4 is respectively wound and directly put on a miniature loose tube 3 in the middle during cabling stranding, and the water blocking yarn 4 can ensure not to permeate water by adopting dtex600 type or less due to the fact that the outer diameter of the loose tube is 1.5 mm. The glass fiber tape 6 with the thickness of 0.3-0.4 mm is longitudinally coated outside the 3-layer cable core of the miniature loose tube, so that the tensile and lateral pressure resistance of the optical cable are improved, the glass fiber material has the elastic modulus of more than 50GPa, the tensile property is excellent, the guarantee is provided for the optical cable when the optical cable is subjected to longitudinal tensile force in the construction and use processes, and the nonmetal all-dielectric material has the advantages of moisture resistance, rust corrosion resistance, lightning stroke resistance and non-conductivity. An outer protective layer 7 with the thickness of 0.5-1.0 mm is extruded while the glass fiber ribbon 6 is longitudinally wrapped, so that the invasion and corrosion of water and gas compounds are prevented, and the effect of protecting the optical cable is achieved. The material of the outer sheath 7 may be a thermoplastic sheath layer coating material such as polyethylene, flame retardant polyolefin, polyamide, or the like.

Fig. 1 is only an example, this patent is not limited to this single structure, but is exemplified by 1+6 structure in the figure, of course, also can be 1+8 or more structures, the minimum 12 cores of tube core number, accomplish the intraductal bigger core number through optic fibre color circle or winding colored bundle yarn, specially, this patent changes traditional layer hank type optical cable center reinforcement and is phosphatized steel wire or nonmetal FRP, through special design, release the center reinforcement position, replace with the bundle tube afterwards, the same cable footpath, can hold more optic fibre core number, simultaneously in order to ensure the mechanical properties of optical cable, cover glass fiber ribbon 6 outside the cable core, through above remodel design, this patent has the subversion design than traditional optical cable, this is the biggest novelty of this patent, because main material, processing equipment, frock all can prolong ordinary optical cable resource, practicality and maneuverability also obtain guarantee.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims (5)

1. The utility model provides an optical fiber intensive super gentle microbeam tube optical cable, includes layer stranded cable core and sheath group, its characterized in that: the layer-stranded cable core consists of a plurality of miniature loose tubes (3), a plurality of UV optical fibers (1) are arranged in the miniature loose tubes (3), water-blocking fiber paste (2) is filled in the miniature loose tubes (3), and water-blocking yarns (4) are arranged on the outer sides of the miniature loose tubes (3);

the sheath comprises a glass fiber band (6) and an outer protective layer (7) which are fixedly connected; the inner side of the glass fiber belt (6) is fixedly connected with a water-blocking aramid yarn (5).

2. The optical fiber-dense ultra-flexible microbeam tube cable of claim 1, wherein: the number of the miniature loose tubes (3) is an odd number of 7 or more.

3. The optical fiber-dense ultra-flexible microbeam tube cable of claim 1, wherein: the number of the UV optical fibers (1) is 12 or more.

4. The optical fiber-dense ultra-flexible microbeam tube cable of claim 1, wherein: the water-blocking fiber paste (2) is thixotropic water-blocking fiber paste.

5. The optical fiber-dense ultra-flexible microbeam tube cable of claim 1, wherein: the miniature loose tube (3) is made of PBT plastic, the outer diameter of the miniature loose tube (3) is controlled to be 1.5+/-0.05 mm, and the wall thickness is controlled to be 0.22+/-0.03 mm.