CN210835386U - Side pressure resistant loose-packing tight-sleeve single-core optical cable - Google Patents

Abstract

The utility model discloses an anti side pressure type loose packing tight sleeve single core optical cable, include: coating an optical fiber, a buffer layer, an aramid yarn layer and an elastic covering layer; the coated optical fiber is taken as a cable core, and a buffer layer, an aramid yarn layer and an elastic covering layer are sequentially coated on the coated optical fiber; the buffer layer is provided with an irregular convex revolution surface; the aramid yarn layer is coated on the rotary surface to form a tight rotary surface with tension; the elastic covering layer is wrapped on the aramid yarn layer, and strip-shaped convex edges are arranged on the inner wall of the elastic covering layer; the convex ribs are arranged in parallel to the axis; an aramid fiber reinforced layer is also coated outside the elastic sleeve layer; the aramid fiber reinforced layer is coated in a mode that a plurality of aramid fiber yarns are grouped and spirally coiled in a double-spiral mode; the sheath layer is tightly wrapped outside the aramid fiber reinforcing layer, and the drawing force of the sheath is not less than 20N/100 mm. The side pressure resistant loose-packed tight-sleeved single-core optical cable is additionally provided with aramid yarns in the tight-sleeved optical fiber, so that the optical fiber can be conveniently stripped, and the tensile capacity of the tight-sleeved optical fiber can be greatly enhanced.

Description

Side pressure resistant loose-packing tight-sleeve single-core optical cable

Technical Field

The utility model relates to an elasticity packing tight set optical cable field, especially an anti side pressure type elasticity packing tight set single core optical cable.

Background

The structure of a conventional tight-buffered optical fiber (also called a secondary coated optical fiber) is that the optical fiber is coated with one (or more) layers of tight-buffered materials (such as resin, PVC, LSZH and the like), the tight-buffered layer (also called a coating layer) realizes basic protection of the optical fiber, and the tight-buffered optical fiber has better mechanical properties than the coated optical fiber.

In some application occasions, the tight-buffered optical fiber is required to have better lateral pressure resistance than the common tight-buffered optical fiber, so that the bending resistance and the lateral pressure resistance of the reinforced loose-buffered optical fiber have significance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the side pressure resistant loose-packing single-core optical cable solves the problem that the side pressure resistant capacity of a single-core optical cable is weak.

The technical scheme of the utility model is that: a lateral pressure resistant loose-packing single-core optical cable comprises: coated optical fibers, buffer layers, aramid yarn layers, and loose-buffered jacket layers, typically have outer diameters of 0.6 mm plus or minus 0.05mm plus or minus 0.9 mm plus or minus 0.05 mm.

Wherein the coated optical fiber is a buffered coated optical fiber. The buffer layer is coated with a layer of ultraviolet light cured resin material outside the coated optical fiber, and the diameter of the buffer layer is usually 0.30 mm-0.40 mm.

The buffer layer has irregular bellied surface of gyration, generally forms the ascending and descending structure of slope form at the gyration package face of buffer layer, is different from bellied terminal surface, and the ascending and descending structure has gentle transition face, can be the better cladding of aramid yarn layer, and the domatic of fluctuation should form size change for radially to make aramid yarn can be more firm grasp buffer layer surface.

The coated optical fiber is used as a cable core, the buffer layer is sequentially coated with an aramid yarn layer and an elastic coating layer, and the elastic coating layer is coated on the aramid yarn layer.

The tight-buffered optical fiber is characterized in that the tight-buffered layer is of a loose-buffered structure, reinforced aramid fibers are wrapped in the loose-buffered tight-buffered layer, and the stripping length of 500-1000 mm can be realized, so that the loose-buffered optical fiber belongs to the tight-buffered optical fiber, but the tight-buffered layer is well stripped, and the optical fiber is stripped when the tight-buffered optical fiber is used on site conveniently.

In order to further strengthen the effect of the elastic sleeve and easy stripping, a strip-shaped convex rib is arranged on the inner wall of the elastic sleeve layer. The convex edges are arranged in parallel to the axis, and the convex size of each convex edge is 0.1-0.2 mm; the rib can increase local pressing force and increase the lateral pressure resistance in local size. More importantly, the ribs are designed to ensure that separation is eased while increasing the dimensional pretension. Still the cladding has the aramid fiber enhancement layer outside the tight jacket of elasticity package, and the aramid fiber enhancement layer adopts the mode cladding that multi-beam aramid fiber yarn divides into two spiral coils, and two spiral coils can increase the intensity that coils, and the temper that the surface was buckled can be ensured to two spiral directions moreover. The sheath layer is tightly wrapped outside the aramid fiber reinforcing layer, and the drawing force of the sheath is not less than 20N/100 mm.

Further, the material of the elastic covering layer is usually LSZH, and the Shore D hardness is about 50D, so that the lateral pressure resistance of the elastic covering layer is enhanced.

Preferably, the length of the ribs is 500mm to 1000mm, and the interval of the ribs in the axial direction is 100mm to 200 mm.

Preferably, the inner wall of the elastic tight-buffered layer is distributed with ribs at least in one circumferential angle, and the ribs arranged in multiple directions can increase the lateral pressure resistance of each side face.

The utility model has the advantages that: the aramid yarn is added in the tight-buffered optical fiber and changed into the enhanced loose-buffered optical fiber, so that the optical fiber can be conveniently stripped, and the tensile capacity of the tight-buffered optical fiber can be greatly enhanced.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a cross-sectional view of a lateral pressure resistant loosely-packed single core optical cable;

wherein: 1. coating the optical fiber; 2. a buffer layer; 3. aramid yarn layer; 4. the elastic sleeve layer is loosely wrapped; 5. an aramid fiber reinforcement layer; 6. a sheath; 7. a relief structure; 8. and (7) a rib.

Detailed Description

The utility model discloses a preferred embodiment:

a lateral pressure resistant loose-packing single-core optical cable comprises: coated optical fiber 1, buffer layer 2, aramid yarn layer 3, loose tight jacket layer 4, coated optical fiber 1 is the coated optical fiber who takes the buffer layer. The buffer layer 2 is formed by wrapping a layer of ultraviolet light-cured resin material outside the coated optical fiber 1.

The buffer layer 2 has irregular convex surface of revolution, generally forms the ascending and descending structure 7 of slope form at the gyration package face of buffer layer 2, is different from bellied terminal surface, and the ascending and descending structure 7 has gentle transition face, can be the better cladding of aramid yarn layer 3, and the slope face of fluctuation should be for radially having formed size variation to make aramid yarn 3 can be more firm grasp buffer layer surface.

Use coated optical fiber 1 as the cable core, cladding aramid yarn layer 3 and elasticity package tight jacket layer 4 in proper order on buffer layer 2, elasticity package tight jacket layer 4 wraps up on aramid yarn layer 3. In order to further strengthen the effect of the elastic sleeve and easy stripping, a strip-shaped convex rib 8 is arranged on the inner wall of the elastic sleeve layer 4. The ribs 8 are arranged parallel to the axis, and the ribs 8 can increase local pressing force and increase lateral pressure resistance in local size. More importantly, the ribs 8 are designed to ensure that separation is eased while increasing the dimensional pretension. An aramid fiber reinforced layer 5 is further coated outside the elastic sleeve layer 4, and the aramid fiber reinforced layer 5 is coated in a mode that a plurality of aramid fiber yarns are grouped and spirally coiled in a double-spiral mode; the aramid fiber reinforced layer 5 is tightly wrapped with the sheath 6 layer, and the drawing force of the sheath is not less than 20N/100 mm.

Based on the above structural characteristics, the advantages of the optical cable are illustrated by the product parameters, as shown in the following table:

by integrating the technical means, the side pressure resistant loose-packed tight-sleeved single-core optical cable is characterized in that:

the optical fiber used may be: coated optical fibers or buffered coated optical fibers;

the coated optical fiber with the buffer layer is coated with a layer of ultraviolet light cured resin material outside the coated optical fiber, the diameter of the buffer layer is usually 0.30 mm-0.40 mm, and the buffer layer can be present or absent according to the requirements of customers;

the tight-buffered optical fiber is called as the loose-buffered optical fiber and belongs to the tight-buffered optical fiber, but the tight-buffered optical fiber is well stripped, so that the optical fiber is conveniently stripped in field use;

the material of the elastic covering layer is usually LSZH, and the Shore D hardness is about 50D, so that the lateral pressure resistance of the elastic covering layer is enhanced;

the loose-clad optical fiber of the single-core optical fiber has the same outer diameter and service performance as the ordinary tight-clad optical fiber, and the outer diameters are usually phi 0.6 +/-0.05 mm and phi 0.9 +/-0.05 mm;

the wall thickness of the sheath layer of the optical cable is obviously thickened compared with that of a common round optical cable, so that the lateral pressure resistance of the optical unit is enhanced;

the sheath layer material of the optical cable is relatively hard, and the Shore D hardness is about 55D, so that the lateral pressure resistance of the optical unit is enhanced;

the sheath layer and the reinforced aramid fiber are also tightly wrapped (the drawing force of the sheath is more than or equal to 20N/100mm), and the whole optical cable section has no too many gaps, so that the protection capability of the optical cable on the optical fiber is obviously improved when the optical cable resists lateral pressure;

the performance of the optical cable meets the following industry standards:

YD/T1258.3-2009 indoor cable series part 3: single-core and double-core optical cables for house wiring;

YD/T1997.2-2015 drop cable for communications part 2: a round optical cable.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.

Claims (3)

1. A side pressure resistant loose-packed single-core optical cable comprises: coating an optical fiber, a buffer layer, an aramid yarn layer and an elastic covering layer; the method is characterized in that: the coated optical fiber is taken as a cable core, and a buffer layer, an aramid yarn layer and an elastic covering layer are sequentially coated on the coated optical fiber; the buffer layer is a solidified resin layer; the buffer layer is provided with an irregular convex revolution surface; the aramid yarn layer is coated on the rotating surface to form a tight rotating surface with tension; the elastic covering layer is wrapped on the aramid yarn layer, and strip-shaped convex edges are arranged on the inner wall of the elastic covering layer; the convex ribs are arranged in parallel to the axis; an aramid fiber reinforced layer is also coated outside the elastic sleeve layer; the aramid fiber reinforced layer is coated in a mode that a plurality of aramid fiber yarns are grouped and spirally coiled in a double-spiral mode; the sheath layer is tightly wrapped outside the aramid fiber reinforcing layer, and the drawing force of the sheath is not less than 20N/100 mm.

2. The lateral pressure resistant loose-packing single-core optical cable according to claim 1, characterized in that: the length of bead is 500mm ~1000mm, and the interval of bead is 100mm ~200mm on the axial.

3. The lateral pressure resistant loose-packing single-core optical cable according to claim 1, characterized in that: the inner wall of the elastic packing sleeve layer is at least provided with the convex ribs in a circumferential angle.

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