CN211505982U

CN211505982U - Triangular reinforced protective optical cable

Info

Publication number: CN211505982U
Application number: CN202020459515.9U
Authority: CN
Inventors: 符剑松
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-09-15
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a triangular reinforced protective optical cable, which comprises a first circular polyolefin sheath (4) and an optical fiber (5), wherein the first polyolefin sheath (4) is also filled with an aramid fiber reinforcing element (6); arranging a second polyolefin sheath (1) at the periphery of the first polyolefin sheath (4), filling a lubricant (4) between the second polyolefin sheath and the first polyolefin sheath, and embedding a plate-shaped reinforcing piece in the second polyolefin sheath (1); the section of the second polyolefin jacket (1) is in an equilateral triangle ring shape; the triangular edge of the second polyolefin sheath (1) is embedded with a plate-shaped reinforcing piece (2) the width of which extends to a position close to the tearing angle. The optical cable does not affect the optical transmission performance of the internal optical fiber, obviously improves the overall lateral pressure resistance of the small-sized optical cable, and has the performances of rat prevention, tensile resistance, easy drawing and the like.

Description

Triangular reinforced protective optical cable

Technical Field

The utility model relates to an optical cable especially relates to a protection type optical cable.

Background

With the development of economy in China, the fields of communication technology, buildings and the like are greatly improved, and the coverage rate of optical fiber to the home is more and more common, so that various laying problems are faced. It is common to lay the optical fiber in the main pipeline, and the optical fiber is laid in the home in the way of extracting branches in the last kilometer. Although various electric wires and cables, communication cables, and the like are commonly used in these fields, such communication cables are generally buried in the ground or in sewer pipes, and have problems such as rat bite, accumulation of garbage, and inconvenience in taking out branches. The existing small-size optical cable protective sleeve cannot effectively prevent corrosion and resist side pressure, so that the service life of the optical cable is greatly reduced, the maintenance cost is increased, and most of the existing conventional optical cables cannot meet the requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a protection type optical cable is strengthened to triangle-shaped not only does not influence the light transmission performance of inside optic fibre, makes the whole anti side pressure performance of small-size optical cable obviously improve moreover, has simultaneously protection against rodents, stretch-proofing and performance such as easily pulling out.

The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts is:

a triangular reinforced protective optical cable comprises a first circular polyolefin sheath 4 and an optical fiber 5, wherein an aramid fiber reinforcing element 6 is filled in the first polyolefin sheath 4; a second polyolefin sheath 1 is arranged on the periphery of the first polyolefin sheath 4 in a matching manner, a lubricant 4 is filled between the first polyolefin sheath 4 and the second polyolefin sheath 1, and a plate-shaped reinforcing piece is embedded in the second polyolefin sheath 1;

the section of the second polyolefin sheath 1 is in an equilateral triangle ring shape, the inner wall of the second polyolefin sheath is matched with the first polyolefin sheath 4, three vertex angles of the second polyolefin sheath 1 are three tearing angles, and the second polyolefin sheath 1 can be torn after the tearing angles are broken;

each triangular side of the second polyolefin sheath 1 is embedded with one plate-shaped reinforcing member 2, the plate-shaped reinforcing member 2 extends along the axial direction, and the width of the plate-shaped reinforcing member 2 extends to a position close to the tearing angle; when the optical cable is subjected to lateral pressure to deform the second polyolefin sheath 1, the ends, matched in pairs, of the plate-shaped reinforcing pieces 2 in the three triangular sides can form mutual support, so that the cross-sectional shape of the second polyolefin sheath 1 is stabilized.

Further, the plate-shaped reinforcement 2 is a non-metal reinforcement.

Further, the plate-shaped reinforcement 2 is a glass fiber reinforcement.

Further, the first polyolefin sheath 4 and the second polyolefin sheath 1 are sheaths using a flame retardant polyolefin material with a low friction coefficient.

Further, the optical fiber 5 is a super-bend loss insensitive optical fiber.

Further, the lubricant 3 is made of superfine talc powder for reducing friction lubrication.

Further, the length of the triangular side of the inner wall of the second polyolefin sheath 1 having an equilateral triangular ring shape in cross section is

The utility model discloses a protection type optical cable is the principle of most stable structure to triangle-shaped enhancement has utilized triangle-shaped ingeniously, the annular second polyolefin sheath of one deck special equilateral triangle has been set up in conventional circular shape sheath and optic fibre periphery, and inlay at three triangle edges of second polyolefin sheath all ingeniously and establish platelike reinforcement, make the optical cable atress and when warping, two liang of assorted one ends of three platelike reinforcements can form and support each other, so can constitute a more stable triangle-shaped structure because the mutual support of three platelike reinforcements promptly, thereby can also keep the cross sectional shape of second polyolefin sheath steadily under pressure, first polyolefin sheath and optic fibre in the second polyolefin sheath provide powerful protection.

Compared with the prior art, the utility model, have following advantage:

(1) because the outermost sheath of the optical cable is designed into an equilateral triangle, the lateral pressure resistance of the whole optical cable is greatly improved according to the balanced stress of the equilateral triangle and the adoption of a mode of embedding the reinforcing piece in three sides of the triangle; preferably, after the internal optical unit adopts the super-Bei bending loss insensitive optical fiber, the lateral pressure resistance and the tensile resistance of the whole optical cable have extremely excellent performances;

(2) the optical cable is in an equilateral triangle shape, however, three top corners (namely tearing corners) are the places which are most easily identified by the optical cable, and the plate-shaped reinforcing piece does not extend into the tearing corner, so that the tearing corners are the places which are most easily stripped on the second polyolefin sheath, and after two arbitrary tearing corners are stripped by adopting a stripping tool, the internal light units can be easily stripped; the design of utilizing the triangle is also equivalent to the arrangement of three tearing angles which are easy to be identified;

(3) since the width of the plate-like strength members in the triangular edges extends to near the tear angle location, almost all of the entire cable is covered by strength members to avoid injury from a mouse bite. Wherein the plate-shaped reinforcement can be metal, and mice can hardly bite the protection of the reinforcement; the plate-shaped reinforcing piece can also be non-metal, such as non-metal glass fiber composite material, when a mouse bites, the glass fiber in the plate-shaped reinforcing piece can stimulate the oral cavity of the mouse, so that the mouse cannot continuously bite the optical cable, and the characteristic of preventing the mouse from biting is realized;

(4) the lubricant is filled between the 1 st polyolefin sheath and the second polyolefin sheath; preferably, the first polyolefin sheath and the second polyolefin sheath are made of flame-retardant polyolefin materials with low friction coefficients, and the lubricant can be superfine talcum powder for reducing friction lubrication; the circular light unit is normally in only two line contacts with the inner wall of the second polyolefin jacket so that the internal light unit can be easily extracted. When the outer sheath of the optical cable is fixed, the optical unit required by construction is pulled out from the interior of the optical cable for continuous wiring;

(5) the overall dimensions of the cable may be such that the inside wall of the second polyolefin jacket has a triangular side length of

Because the optical cable has special appearance shape, the optical cable can be easily and effectively identified and distinguished together with other optical cables laid on the appearance, the time for identifying and distinguishing by constructors is greatly reduced, and the construction efficiency is improved.

Drawings

Fig. 1 is the structure schematic diagram of the triangular reinforced protection type optical cable of the present invention.

In the figure:

1. second polyolefin jacket 2, plate-like reinforcement

3. Lubricant 4, first polyolefin jacket

5. Optical fiber 6 and aramid fiber reinforced element

Detailed Description

The invention is further described with reference to the following figures and examples.

Fig. 1 shows a triangular reinforced optical cable of the guarded type comprising a first polyolefin jacket 4 of circular shape and an optical fiber 5, said optical fiber 5 being preferably an ultra-beta bend loss insensitive optical fiber. The first polyolefin sheath 4 is also filled with an aramid fiber reinforcing element 6; the periphery of the first polyolefin sheath 4 is provided with a second polyolefin sheath 1 in a matching manner, a lubricant 4 is filled between the first polyolefin sheath 4 and the second polyolefin sheath 1, the second polyolefin sheath 1 is embedded with a plate-shaped reinforcing piece 2, and the second polyolefin sheath 1 and the embedded reinforcing piece 2 are formed by one-time processing and extrusion molding.

The first polyolefin sheath 4 and the second polyolefin sheath 1 are preferably sheaths using a flame retardant polyolefin material with a low friction coefficient to obtain better low friction and easy drawing. The lubricant 3 may be a very fine talc powder for reducing friction lubrication to facilitate drawing of the optical unit in the second polyolefin sheath 1.

The section of the second polyolefin sheath 1 is in an equilateral triangle ring shape, the inner wall of the second polyolefin sheath is matched with the first polyolefin sheath 4, three vertex angles of the second polyolefin sheath 1 are three tearing angles, and the second polyolefin sheath 1 can be torn after the tearing angles are broken; after the peeling tool is used for peeling two random tearing angles, the internal light unit can be easily peeled.

The plate-shaped reinforcement 2 may be a metal material reinforcement; the optical cable can also be a non-metal reinforcing part, such as a glass fiber reinforcing part, when a mouse bites, the glass fiber inside the optical cable can stimulate the oral cavity of the mouse, so that the mouse cannot continuously bite the optical cable, and therefore the mouse bite prevention effect is achieved.

The optical cable has excellent rat-proof, tensile and easy-to-draw performances, can keep small size, and the side length of the triangular side of the inner wall of the second polyolefin sheath 1 with the section in the shape of an equilateral triangle ring can be equal to

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A triangular reinforced protection type optical cable comprises a first circular polyolefin sheath (4) and an optical fiber (5), wherein an aramid fiber reinforcing element (6) is filled in the first polyolefin sheath (4); the method is characterized in that: a second polyolefin sheath (1) is arranged on the periphery of the first polyolefin sheath (4) in a matched mode, a lubricant (3) is filled between the first polyolefin sheath (4) and the second polyolefin sheath (1), and a plate-shaped reinforcing piece is embedded in the second polyolefin sheath (1);

the section of the second polyolefin sheath (1) is in an equilateral triangle ring shape, the inner wall of the second polyolefin sheath is matched with the first polyolefin sheath (4), three vertex angles of the second polyolefin sheath (1) are three tearing angles, and the second polyolefin sheath (1) can be torn after the tearing angles are broken;

each triangular side of the second polyolefin sheath (1) is internally provided with one plate-shaped reinforcing piece (2), and the plate-shaped reinforcing pieces (2) extend along the axial direction and have the width extending to the position close to the tearing angle; when the optical cable is subjected to lateral pressure to deform the second polyolefin sheath (1), one end of each matched plate-shaped reinforcing piece (2) in each three triangular sides can form mutual support, so that the cross-sectional shape of the second polyolefin sheath (1) is stabilized.

2. The triangular reinforced optical fiber cable of claim 1, wherein: the plate-shaped reinforcing part (2) is a non-metal reinforcing part.

3. The triangular reinforced optical fiber cable of claim 2, wherein: the plate-shaped reinforcing member (2) is a glass fiber reinforcing member.

4. The triangular reinforced optical fiber cable of claim 1, wherein: the first polyolefin sheath (4) and the second polyolefin sheath (1) are sheaths made of flame-retardant polyolefin materials with low friction coefficients.

5. The triangular reinforced optical fiber cable of claim 1, wherein: the optical fiber (5) is a super-Bei bending loss insensitive optical fiber.

6. The triangular reinforced optical cable according to any one of claims 1 to 5, wherein: the lubricant (3) adopts superfine talcum powder for reducing friction lubrication.

7. The triangular reinforced optical fiber cable of claim 6, wherein: the side length of the triangular side of the inner wall of the second polyolefin sheath (1) with the section of an equilateral triangle ring is