CN212009053U - Novel full-dry FTTH distribution cable - Google Patents

Abstract

The utility model provides a novel full dry-type FTTH distribution cable, its tight nested structure that blocks water of using novel structure for the mechanical properties of optical cable is good, and it is effectual to block water, makes the production percent of pass of optical cable high, production efficiency good, and it includes a plurality of tight optic fibre of overlapping, and the outer coating of every tight optic fibre of overlapping has the layer of blocking water, and a plurality of tight optic fibre combination of overlapping form tight nested and restraint, tight nested restraint still mixes a plurality of glass fiber yarn, the surface cladding that tight nested restraint has the PE sheath, the embedded FRP reinforcement that has arranged of the thickness direction of PE sheath.

Description

Novel full-dry FTTH distribution cable

Technical Field

The utility model relates to an optical cable structure's technical field specifically is a novel full-dry type FTTH distribution cable.

Background

In the FTTH propelling process, the full-dry optical cable is favored by customers due to the advantages of environmental protection, high construction efficiency, light weight and low cost. The practical water-blocking tape of the traditional semi-dry optical cable longitudinally wraps the cable core of the optical cable to replace the water-blocking effect of factice, and the water-blocking mode filled with factice is still adopted in the sleeve. The sleeve of the full-dry optical cable adopts water-blocking yarn to replace factice to generate water-blocking effect, the existing full-dry optical cable adopts a layer-stranding type or central tube type cable core structure, and water-blocking substances such as water-blocking yarn and water-blocking powder are generally filled in a loose sleeve to achieve the purpose of preventing water vapor from permeating, however, the problems of yarn breakage and fiber breakage, increased optical fiber attenuation, easy blockage of the water-blocking yarn powder on a needle tube to cause the fluctuation of the outer diameter of the sleeve and the like exist in the actual production process, so that the product percent of pass is low, and the production efficiency is.

Disclosure of Invention

To the above problem, the utility model provides a novel full-dry type FTTH distribution cable, it uses the tight nested structure that blocks water of novel structure for the mechanical properties of optical cable is good, and block water effectually, makes the production qualification rate of optical cable high, production efficiency good.

The utility model provides a novel full-dry type FTTH distribution cable which characterized in that: the optical fiber tight-buffered cable comprises a plurality of tight-buffered optical fibers, wherein the outer layer of each tight-buffered optical fiber is coated with a water-resistant layer, the tight-buffered optical fibers are combined to form a tight-buffered bundle, the tight-buffered bundle is also mixed with a plurality of glass fiber yarns, the outer surface of the tight-buffered bundle is coated with a PE (polyethylene) sheath, and an FRP (fiber reinforced plastic) reinforcing piece is embedded in the thickness direction of the PE sheath.

It is further characterized in that: the thickness of the water-blocking layer on the outer layer of each tight-buffered optical fiber is 3-6 microns, and the water-blocking material is coated on the outer surface of each tight-buffered optical fiber and then is subjected to photocuring to form a water-blocking coated tight-buffered optical fiber;

the periphery of a tight-buffered bundle formed by a plurality of tight-buffered optical fibers is provided with a certain number of strands of the glass fiber yarns, the PE sheath is coated on the outer surface of the tight-buffered bundle in an extrusion molding manner, and two groups of FRP reinforcements arranged at two ends in the same radial direction are respectively embedded in corresponding positions of the PE sheath;

each group of FRP reinforcing pieces comprises two FRP reinforcing units which are arranged in parallel and are jointed;

no more than 96 tight-sleeved optical fibers are arranged in the tight-sleeved bundle;

preferably, 24 tight-buffered optical fibers and two strands of glass fiber yarns are arranged in the tight-buffered bundle, and the glass fiber yarns are respectively and independently arranged at two non-adjacent positions on the outer surface of the tight-buffered bundle;

and the connecting line of the two glass fiber yarns is perpendicular to the connecting line of the two groups of FRP reinforcing pieces.

A novel manufacturing process of a full-dry FTTH distribution cable is characterized in that: the optical unit is formed by optical fibers, then the optical unit is externally tightly sleeved to form tightly sleeved optical fibers, then water blocking materials are coated on the outer surfaces of the tightly sleeved optical fibers to form water blocking layers, then a plurality of tightly sleeved optical fibers coated with the water blocking layers and a certain number of glass fiber yarns are combined to form tightly sleeved bundles, then PE sheaths are formed on the outer surfaces of the tightly sleeved bundles in an extrusion coating mode, a plurality of FPR reinforcements are arranged in inner cavities of the PE sheaths in the thickness direction in the sheath forming process, and the optical cables formed by the sheaths can leave a factory after being detected to be qualified.

Adopt the utility model discloses a behind the structure, it forms the water blocking layer at the surface coating one deck water blocking material of conventional tight set optic fibre, form neotype tight set optic fibre after the solidification, this group water layer meets water rapid expansion, have very strong effect of blocking water, the tight set optic fibre that will have the water blocking layer is used for filling the inner chamber of PE sheath, form tight set and restraint, it need not to block water the yarn, the arrangement of water-blocking powder, effectively solve when conventional dry-type optical cable produces because the yarn that blocks water beats or water-blocking powder piles up the undulant problem of sleeve pipe external diameter that the stifled membrane arouses, also can not lead to the fact the production waste because the yarn fracture that blocks water, it adopts a plurality of tight set pipelines to assemble into tight set and restraints, set up the glass fiber yarn of certain strand number in tight set, again cladding PE sheath's structure, a plurality of FRP reinforcements are embedded as supporting reinforcement in the PE sheath, provide necessary tensile force for the optical cable, can further compress, The density of the optical fiber is improved; all media of the optical cable are non-metal components, so that the safety of the optical cable introduced into a room from the outside is fully guaranteed, and lightning attack is avoided; to sum up, it uses the tight nested structure that blocks water of novel structure for the mechanical properties of optical cable is good, and blocks water effectually, makes the production qualification rate of optical cable high, production efficiency good.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art fully dry FTTH distribution cable;

fig. 2 is a schematic cross-sectional structure of the present invention;

the names corresponding to the sequence numbers in the figure are as follows:

the device comprises a tight-buffered optical fiber 1, a water-resistant layer 2, a tight-buffered bundle 3, a glass fiber yarn 4, a PE sheath, an FRP reinforcement 6 and an FRP reinforcement unit 61.

Detailed Description

A novel full dry type FTTH distribution cable, see fig. 2: the optical fiber tight-buffered cable comprises a plurality of tight-buffered optical fibers 1, wherein a water-resistant layer 2 is coated on the outer layer of each tight-buffered optical fiber 1, the tight-buffered optical fibers 1 are combined to form a tight-buffered bundle 3, the tight-buffered bundle 3 is also mixed with a plurality of glass fiber yarns 4, the outer surface of the tight-buffered bundle 3 is coated with a PE sheath 5, and an FRP reinforcement 6 is embedded in the thickness direction of the PE sheath 5.

The thickness of the water-blocking layer 2 on the outer layer of each tight-buffered optical fiber 1 is 3-6 microns, and the water-blocking material is coated on the outer surface of each tight-buffered optical fiber 1 and then is subjected to photocuring to form a water-blocking coated tight-buffered optical fiber;

the periphery of a tight-buffered bundle formed by a plurality of tight-buffered optical fibers 1 is provided with a certain number of strands of glass fiber yarns 4, a PE sheath 5 is coated on the outer surface of the tight-buffered bundle 3 in an extrusion molding manner, and two groups of FRP reinforcements 6 arranged at two ends in the same radial direction are respectively embedded in corresponding positions of the PE sheath 5;

each group of FRP reinforcements 6 comprises two FRP reinforcement units 61 which are arranged in parallel and are attached to each other;

no more than 96 tight-sleeved optical fibers are arranged in the tight-sleeved bundle 3;

in a specific embodiment, 24 tight-buffered optical fibers and two glass fiber yarns 4 are arranged in the tight-buffered bundle 3, and the glass fiber yarns 4 are respectively and independently arranged at two non-adjacent positions on the outer surface of the tight-buffered bundle 3; the connecting line of the two glass fiber yarns 4 is perpendicular to the connecting line of the two groups of FRP reinforcing pieces 6.

A manufacturing process of a novel full-dry FTTH distribution cable comprises the following steps: the optical unit is formed by optical fibers, then the optical unit is externally tightly sleeved to form tightly sleeved optical fibers, then water blocking materials are coated on the outer surfaces of the tightly sleeved optical fibers to form water blocking layers, then a plurality of tightly sleeved optical fibers coated with the water blocking layers and a certain number of glass fiber yarns are combined to form tightly sleeved bundles, then PE sheaths are formed on the outer surfaces of the tightly sleeved bundles in an extrusion coating mode, a plurality of FPR reinforcements are arranged in inner cavities of the PE sheaths in the thickness direction in the sheath forming process, and the optical cables formed by the sheaths can leave a factory after being detected to be qualified.

The optical cable has the advantages that a layer of water-blocking material is coated on the surface of a conventional tight-buffered optical fiber to form a water-blocking layer, the water-blocking layer is cured to form a novel tight-buffered optical fiber, the outer diameter of the tight-buffered optical fiber is only 0.6-0.92 mm, the water-blocking layer rapidly expands when meeting water, and has a strong water-blocking effect, the tight-buffered optical fiber with the water-blocking layer is used for filling the inner cavity of a PE sheath to form a tight-buffered bundle, water-blocking yarns and water-blocking powder are not required to be arranged, the problem of fluctuation of the outer diameter of a sleeve caused by the jumping of the water-blocking yarns or the accumulation of water-blocking powder and blocking films during the production of the conventional dry optical cable is effectively solved, production waste caused by the breakage of the water-blocking yarns is avoided, a plurality of tight-buffered pipelines are assembled into the tight-buffered bundle, a certain number of glass fiber yarns are arranged in the tight-buffered bundle, then the PE sheath is, meanwhile, the structural size of the optical cable can be further compressed, and the optical fiber density can be improved; all media of the optical cable are non-metal components, so that the safety of the optical cable introduced into a room from the outside is fully guaranteed, and lightning attack is avoided; to sum up, it uses the tight nested structure that blocks water of novel structure for the mechanical properties of optical cable is good, and blocks water effectually, makes the production qualification rate of optical cable high, production efficiency good.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a novel full-dry type FTTH distribution cable which characterized in that: the optical fiber tight-buffered cable comprises a plurality of tight-buffered optical fibers, wherein the outer layer of each tight-buffered optical fiber is coated with a water-resistant layer, the tight-buffered optical fibers are combined to form a tight-buffered bundle, the tight-buffered bundle is also mixed with a plurality of glass fiber yarns, the outer surface of the tight-buffered bundle is coated with a PE (polyethylene) sheath, and an FRP (fiber reinforced plastic) reinforcing piece is embedded in the thickness direction of the PE sheath.

2. A novel fully dry FTTH distribution cable according to claim 1, wherein: the thickness of the water-blocking layer on the outer layer of each tight-buffered optical fiber is 3-6 microns, and the water-blocking material is coated on the outer surface of each tight-buffered optical fiber and then is subjected to photocuring to form the water-blocking coated tight-buffered optical fiber.

3. A novel fully dry FTTH distribution cable according to claim 1, wherein: the periphery of a tight-buffered bundle formed by a plurality of tight-buffered optical fibers is provided with a certain number of strands of the glass fiber yarns, the PE sheath is coated on the outer surface of the tight-buffered bundle in an extrusion molding manner, and two groups of FRP reinforcements arranged at two ends in the same radial direction are respectively embedded in corresponding positions of the PE sheath.

4. A novel fully dry FTTH distribution cable according to claim 3, wherein: each group of FRP reinforcements comprises two FRP reinforcement units which are arranged in parallel and attached to each other.

5. A novel fully dry FTTH distribution cable according to claim 1, wherein: and no more than 96 tight-sleeved optical fibers are arranged in the tight-sleeved bundle.

6. A novel fully dry FTTH distribution cable according to claim 3, wherein: the tight-buffered optical fiber bundle is characterized in that 24 tight-buffered optical fibers and two strands of glass fiber yarns are arranged in the tight-buffered optical fiber bundle, and the glass fiber yarns are independently arranged at two non-adjacent positions on the outer surface of the tight-buffered optical fiber bundle.

7. A novel fully dry FTTH distribution cable according to claim 6, wherein: and the connecting line of the two glass fiber yarns is perpendicular to the connecting line of the two groups of FRP reinforcing pieces.

Images