CN106054338B - C-shaped sleeve all-medium self-supporting optical cable for access network and preparation method thereof - Google Patents

Abstract

The invention discloses a C-shaped sleeve all-medium self-supporting optical cable for an access network, which comprises the following components: the light unit part and the bearing element part are C-shaped protective sleeves sleeved outside the light unit part, the contact surface of the C-shaped protective sleeves and the light unit part is of a C-shaped structure, FRP (fiber reinforce Plastic) is filled in the C-shaped protective sleeves, the FRP is respectively arranged at the near-opening end of the C-shaped protective sleeves, and the FRP is used as a reinforcing piece of the C-shaped protective sleeves. The invention develops a novel C-shaped self-supporting protective sleeve all-medium self-supporting optical cable for an access network, and the application of the optical cable reduces the manufacturing cost and the construction cost of the optical cable, thereby creating a novel optical cable with lower price and more stable performance.

Description

C-shaped sleeve all-medium self-supporting optical cable for access network and preparation method thereof

Technical Field

The invention relates to the field of optical cables, in particular to a C-shaped sleeve medium self-supporting optical cable for an access network and a preparation method thereof.

Background

The self-supporting optical cable has the characteristics of simple and convenient laying and low construction cost because the steel stranded wires are not required to be erected and the hooks are not required to be installed when the self-supporting optical cable is laid in an overhead manner, is widely applied under the condition of long-distance transmission or high-altitude laying, and further optimizes the existing self-supporting optical cable structure, thereby being an important way for widening the application of the self-supporting optical cable and optimizing the working state of the self-supporting optical cable.

The traditional self-supporting aerial optical cable is characterized in that an optical unit part (optical fiber, loose tube) and a bearing element part (aramid fiber, steel wire twisted wire or FRP) are sheathed in the same optical cable in the production process. Conventional self-supporting aerial fiber cables can be damaged by mechanical or environmental factors, have high costs for maintenance or re-cabling, and affect communications.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide a C-shaped sleeve all-medium self-supporting optical cable for an access network, which comprises two parts: the communication portion includes an optical cable and the load carrying portion is a C-shaped protective sleeve that provides the necessary tension and protects the cable from mechanical and environmental elements.

In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:

a C-jacket all-dielectric self-supporting fiber optic cable for an access network, comprising: a light unit portion and a force bearing element portion, the light unit portion comprising: the central reinforcement of setting in central point puts, central reinforcement periphery is equipped with a plurality of loose tubes, every be equipped with a plurality of optic fibre in the loose tube, every loose tube intussuseption is filled with fine cream, water blocking powder or water blocking yarn, the loose tube constitutes the cable core with optic fibre, and the filling mode of cable core is dry-type filling, and dry-type filling includes: water-blocking yarns are arranged in the central reinforcing piece and the loose tube, the cable core is fixed by water-blocking binding yarns, and an outer sheath is coated outside the water-blocking binding yarns;

the bearing element part is a C-shaped protective sleeve sleeved outside the light unit part, the contact surface of the C-shaped protective sleeve and the light unit part is of a C-shaped structure, at least two bundles of FRP are filled in the C-shaped protective sleeve, the FRP is respectively arranged at the position of the C-shaped protective sleeve near the opening end, and the FRP is a reinforcing piece of the C-shaped protective sleeve.

Further preferably, the C-shaped protective sleeve is an HDPE protective sleeve, and the HDPE protective sleeve material comprises the following components in parts by weight:

further preferably, the flame retardant comprises: aluminum hydroxide, melamine cyanurate, and poly-spiro-phosphate.

Further preferably, the filler comprises talcum powder and calcium carbonate, and the particle size of the filler is 2500-4000 meshes.

Further preferably, the lubricant comprises polyethylene wax, paraffin wax, white oil.

Further preferably, the glass fibers have a length of 0.5 to 2.5mm.

Further preferably, the number of loose tubes is 1-6.

Further preferably, the outer diameter of the light unit section is 6.0mm, and the maximum core number of the light unit section is 72 cores.

Further preferably, the minimum bending radius of the light unit section is 60mm.

Further preferably, the preparation method of the C-shaped sleeve all-medium self-supporting optical cable for the access network comprises the following steps: FRP passes through the extrusion molding die of the machine head in parallel, HDPE resin protective sleeve materials are extruded out of the periphery of the FRP through the die, and a C-shaped protective sleeve is obtained;

the optical cable cabling comprises the following steps: firstly, coloring an optical fiber, sleeving a loose tube outside the colored optical fiber, twisting the loose tube and a central reinforcing piece to form a cable core, extruding an outer sheath to form an optical unit part, and taking out after detection is qualified;

in the construction optical cable paying-off stage, the optical cable is embedded into a C-shaped protective sleeve through an auxiliary double-roller tool, and the C-shaped sleeve full-medium self-supporting optical cable for an access network is obtained.

The beneficial effects of the invention are as follows:

the invention relates to a C-shaped sleeve all-medium self-supporting optical cable for an access network, which is structurally divided into an optical unit part and a bearing element part, wherein the bearing element and the optical cable are respectively produced by dividing into two parts, tools are used for integrating into one in the construction process, hardware fittings are used for laying on a tower pole, and the construction and installation are efficient and low in cost.

The bearing element part of the invention adopts a composite material mainly made of HDPE resin, is embedded into a C-shaped bearing protective outer sleeve made of parallel FRP, has the bearing tension function, and can protect the optical cable from external factors after the optical cable is embedded into a smaller opening, thereby ensuring the optical fiber to safely and stably transmit signals.

The miniature optical cable has small outer diameter, adopts a semi-dry or full-dry layer stranding structure, has certain lateral pressure resistance and tensile force, is embedded in a C-shaped protective sleeve through a special tool, can meet the requirement of 100m span at maximum, and can be flexibly applied to 4G and FTTx network construction.

The optical cable is an all-dielectric optical cable, does not contain metal components, and can shield lightning; and it adopts distributed structure, makes things convenient for the quick replacement to the optical cable when later stage optical cable operation trouble.

The novel construction tool and hardware fitting are developed and designed, so that the novel optical cable has greater advantages than the traditional optical cable, the potential of the novel optical cable occupying the market is promoted, the manufacturing cost and the construction cost of the optical cable are reduced by the application of the novel optical cable, and the novel optical cable with lower price and more stable performance is created.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the light unit section of FIG. 1;

FIG. 3 is a schematic view of the portion of the load bearing member of FIG. 1;

wherein, 10-center reinforcement, 20-loose tube, 30-optical fiber, 40-fiber paste (or water-blocking powder or water-blocking yarn), 50-water-blocking binding yarn, 70-water-blocking yarn, 80-outer sheath, 90-C type protective sleeve and 100-FRP.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-3, this embodiment discloses a C-shaped jacket all-medium self-supporting optical cable for access network, the structure of which is divided into two parts, mainly comprising: a light unit portion and a force bearing element portion, said light unit portion comprising: the central reinforcement 10 is disposed at a central position, a plurality of loose tubes 20 are disposed at the periphery of the central reinforcement 10, a plurality of optical fibers 30 are disposed in each loose tube 20, a fiber paste 40 is filled in each loose tube 20, or the inside of the loose tube 20 is dry, water-blocking powder or water-blocking yarn is used as water-blocking material, the loose tube 20 and the optical fibers 30 form a cable core, the filling mode of the cable core is dry filling, and the dry filling comprises: water blocking yarns 70 are arranged in the central reinforcing member 10 and the loose tube 20, the cable core is fixed by water blocking binding yarns 50, and an outer sheath 80 is coated outside the water blocking binding yarns 50.

In this embodiment, the optical unit part is a miniature integrated easy-to-branch optical cable, the optical cable is made by sleeving a single-mode or multimode optical fiber into an inner-filled waterproof compound loose tube made of high-modulus plastic, the center of the cable core is a nonmetal reinforcing core, the sleeve is stranded around the center reinforcing core SZ to ensure sufficient stretching excess length, the water-blocking yarn and the water-blocking ribbon effectively prevent the optical cable from being influenced by moisture, and a layer of polyethylene sheath is extruded on the periphery of the cable core. The miniature optical cable comprises 1-6 loose tubes, each loose tube comprises 12 optical fibers, and the outer diameter of the tube and the wall thickness of the sheath are strictly controlled, so that the outer diameter of the miniature optical cable is ensured to be much smaller than that of a common optical cable, and the outer diameter of a matched C-shaped protective sleeve is not too large (as shown in figure 3). The micro cable has certain mechanical and environmental resistance due to the adoption of a semi-dry layer or a full-dry twisted structure, and ensures the safety and stability in the clean and efficient construction and installation process. The minimum bending radius of the optical cable is 60mm, the outer diameter of the optical cable is 6.0mm, and the maximum core number can reach 72 cores.

The bearing element part is a C-shaped protective sleeve 90 sleeved outside the light unit part, the contact surface of the C-shaped protective sleeve 90 and the light unit part is of a C-shaped structure, at least two bundles of FRP100 are filled in the C-shaped protective sleeve, the FRP100 is respectively arranged at the near opening end of the C-shaped protective sleeve 90, and the FRP100 is used as a reinforcing piece of the C-shaped protective sleeve 90.

The C-shaped protective sleeve is made of HDPE resin as a main material and is added with special materials, so that the C-shaped protective sleeve has excellent mechanical and physical properties, electrical properties and environmental resistance, and the service life is ensured to be more than 25 years. In self-supporting overhead use, in order to reduce the surface friction force and influence of wind speed and icing, the shape of the prepared protective sleeve is similar to that of English letter C, parallel FRP is embedded in the protective sleeve as a bearing element, the size and the number of the FRP are determined by the specific engineering overhead span, and the outer diameter and the opening size are strictly controlled (as shown in figure 2). The C-shaped protective sleeve is internally embedded with the optical cable, and can meet the requirement of 100 m-span overhead laying at maximum.

In this example, the HDPE resin protective sheath material formulation is shown in table 1.

Table 1 table of formulation of HDPE materials for C-jacket in example 1

Composition of the composition	Content (parts by weight)
		HDPE resin	100
Glass fiber	2
		Flame retardant	35
Lubricant	5
		Antioxidant	0.1
Ultraviolet absorber	0.5
		Packing material	3

Example 2

The cable construction in example 2 was as in example 1 and the HDPE resin protective sheath material formulation described above is shown in table 2.

Table 2 table of formulation of HDPE materials for C-jacket in example 2

Composition of the composition	Content (parts by weight)
		HDPE resin	100
Glass fiber	6
		Flame retardant	40
Lubricant	9
		Antioxidant	0.3
Ultraviolet absorber	2.25
		Packing material	8
Coloring material	0.5

Example 3

The cable construction in example 3 was as in example 1 and the HDPE resin protective sheath material formulation described above is shown in table 3.

TABLE 3 formulation of HDPE material for C protective sheath in example 3

Composition of the composition	Content (parts by weight)
		HDPE resin	100
Glass fiber	10
		Flame retardant	45
Lubricant	13
		Antioxidant	0.5
Ultraviolet absorber	3
		Packing material	15
Coloring material	1

In the above embodiments 1 to 3, the above flame retardant includes: aluminum hydroxide, melamine cyanurate, and poly-spiro-phosphate.

The filler comprises talcum powder and calcium carbonate, and the granularity of the filler is 2500-4000 meshes; the lubricant comprises polyethylene wax, paraffin wax and white oil; the length of the glass fiber is 0.5-2.5mm.

The HDPE resin material of the C-shaped protective sleeve in the embodiment 1-3 has good flame retardance, weather resistance, oxidation resistance and mechanical property, can well protect the optical cable, and has long service life.

In the above embodiments 1-3, a method for preparing a C-shaped jacket all-medium self-supporting optical cable for an access network, the method for preparing a C-shaped protective jacket comprises the following steps: FRP passes through the extrusion molding die of the machine head in parallel, and then HDPE resin protective sleeve materials are extruded out of the periphery of the FRP through the die, so that the C-shaped protective sleeve is obtained.

The optical cable cabling comprises the following steps: firstly, coloring an optical fiber, sleeving a loose tube outside the colored optical fiber, then twisting the loose tube and a central reinforcing piece to form a cable core, extruding an outer sheath to form an optical unit part, and taking out after detection is qualified.

In the construction optical cable paying-off stage, the optical cable is embedded into a C-shaped protective sleeve through an auxiliary double-roller tool, and the C-shaped sleeve full-medium self-supporting optical cable for an access network is obtained.

In the optical cable storage and transportation process, the optical cable part and the C-shaped protective sleeve are in a separated state, and the optical cable is embedded into the C-shaped protective sleeve through an auxiliary double-roller tool only in the construction optical cable paying-off stage, so that the C-shaped sleeve all-medium self-supporting optical cable for the access network is obtained. The tool comprises two metal rollers with ball bearings, and when the optical cable and the C-shaped bearing protective sleeve simultaneously pass through the rollers, a small force is applied by hand, so that the cable can be embedded into the C-shaped bearing protective sleeve.

Because the C-shaped bearing protection tube is not of a circular traditional structure, the strain hardware is slightly different from the common one. The C-shaped protective sleeve is filled with a conical filling rope so as to enlarge the outer diameter, and then the fitting is tightly held on the filled protective sleeve, so that the C-shaped protective tube plays a bearing role, and the optical cable can be reserved for a certain length according to actual needs.

And supporting the bearing force of each tower pole C-shaped sleeve all-medium self-supporting optical cable between the tension-resisting sections by using a suspension hardware fitting, pulling out the optical cable, filling the C-shaped protective sleeve with a filling rope, and suspending the C-shaped protective sleeve on the tower pole by using the hardware fitting. Because the optical cable is light in weight, has no high requirement on hardware fittings, is very simple and convenient and quick to construct and install, and can reserve a section of long optical cable according to actual needs, thereby being convenient for later maintenance needs.

In the embodiments 1-3, the design thought of the traditional self-supporting aerial optical cable is set aside, and the self-supporting optical cable concept of a brand new structural design and construction mode is adopted, so that the problem of self-supporting aerial laying optical cables with larger span for access networks can be well solved, the construction efficiency can be increased, and the use cost can be reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a C type cover all-dielectric self-supporting optical cable for access network which characterized in that, it includes: a light unit portion and a force bearing element portion, the light unit portion comprising: the central reinforcement of setting in central point puts, central reinforcement periphery is equipped with a plurality of loose tubes, every be equipped with a plurality of optic fibre in the loose tube, every loose tube intussuseption is filled with fine cream, water blocking powder or water blocking yarn, the loose tube constitutes the cable core with optic fibre, and the filling mode of cable core is dry-type filling, and dry-type filling includes: water-blocking yarns are arranged in the central reinforcing piece and the loose tube, the cable core is fixed by water-blocking binding yarns, and an outer sheath is coated outside the water-blocking binding yarns;

the bearing element part is a C-shaped protective sleeve sleeved outside the light unit part, the contact surface of the C-shaped protective sleeve and the light unit part is of a C-shaped structure, at least two bundles of FRP are filled in the C-shaped protective sleeve, the FRP is respectively arranged at the near-opening end of the C-shaped protective sleeve, and the FRP is a reinforcing piece of the C-shaped protective sleeve;

the C-shaped protective sleeve is an HDPE protective sleeve, and the HDPE protective sleeve comprises the following materials in parts by weight:

HDPE resin 100 parts

2-10 parts of glass fiber

35-45 parts of flame retardant

5-13 parts of lubricant

0.1 to 0.5 part of antioxidant

0.5-3 parts of ultraviolet absorbent

3-15 parts of filler

0-1 part of pigment.

2. The C-jacket all-dielectric self-supporting fiber optic cable for an access network of claim 1, wherein the flame retardant comprises: aluminum hydroxide, melamine cyanurate, and poly-spiro-phosphate.

3. The C-jacket all-dielectric self-supporting fiber optic cable for access network of claim 1, wherein the filler comprises talc powder and calcium carbonate, and the filler has a particle size of 2500-4000 mesh.

4. The C-jacket all-dielectric self-supporting fiber optic cable for access networks of claim 1, wherein the lubricant comprises polyethylene wax, paraffin wax, white oil.

5. A C-jacket all-dielectric self-supporting fiber optic cable for an access network as recited in claim 1, wherein the glass fibers have a length of 0.5-2.5mm.

6. The C-jacket all-dielectric self-supporting fiber optic cable for access network of claim 1, wherein the number of loose tubes is 1-6.

7. A C-jacket all-dielectric self-supporting fiber optic cable for an access network as recited in claim 1, wherein said optical unit portion has an outer diameter of 6.0mm and a maximum core count of 72 cores.

8. A C-jacket all-dielectric self-supporting fiber optic cable for an access network as recited in claim 7, wherein the minimum bend radius of the optical unit section is 60mm.

9. A method for preparing a C-jacket all-dielectric self-supporting fiber optic cable for an access network as set forth in any one of claims 1 to 8, wherein the method for preparing the C-jacket comprises the steps of:

FRP passes through the extrusion molding die of the machine head in parallel, HDPE resin protective sleeve materials are extruded out of the periphery of the FRP through the die, and a C-shaped protective sleeve is obtained;

the optical cable cabling comprises the following steps: firstly, coloring an optical fiber, sleeving a loose tube outside the colored optical fiber, twisting the loose tube and a central reinforcing piece to form a cable core, extruding an outer sheath to form an optical unit part, and taking out after detection is qualified;

in the construction optical cable paying-off stage, the optical cable is embedded into a C-shaped protective sleeve through an auxiliary double-roller tool, and the C-shaped sleeve full-medium self-supporting optical cable for an access network is obtained.