CN211014752U

CN211014752U - Micro-beam tube type flexible thread armored optical cable

Info

Publication number: CN211014752U
Application number: CN201922323799.9U
Authority: CN
Inventors: 何伟; 郭鑫; 朱华
Original assignee: Jiangsu Xinda Communication Technology Co ltd
Current assignee: Jiangsu Xinda Communication Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-14
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a micro-beam tube type flexible thread armored optical cable, include: the outer sheath, aramid yarn, micro-bundle tube and colored optical fiber; a plurality of colored optical fibers arranged in a bundle-like structure; coating a micro-beam on the outer side of the beam-shaped structure to form a cylindrical cable bundle; the beam-shaped structure is a basic unit with a regular triangle section formed by tangentially arranging three colored optical fibers; arranging three colored optical fibers side by side on each side of the base unit to form a wire harness with multiple bearing surfaces; sheathing an armor layer outside the microbeam tube; a supporting part is arranged on the inner wall of the armor layer; the supporting part acts on the surface of the microbeam tube in the concave part; a structural gap is formed between the armor layer and the micro-beam tube; filling a foaming material in the structural gap; a braided layer made of metal wires is sleeved outside the armor layer; an aramid yarn layer is bound outside the weaving layer; the outer sheath is tightly sleeved outside the aramid yarn layer. The micro-beam tube is used for wrapping and solidifying the relative positions of the optical fibers, so that the relative position change of the optical fibers is avoided, and the stable performance of the optical fibers in use is ensured.

Description

Micro-beam tube type flexible thread armored optical cable

Technical Field

The utility model relates to a screw thread armor optical cable field, especially a flexible screw thread armor optical cable of microbeam tubular.

Background

In the conventional thread armored optical cable, the optical fibers in the armor layer are in a loose and free state, but under the action of external force (stretching, bending, twisting and the like), a plurality of optical fibers may be mutually staggered and extruded, so that the attenuation of the optical fibers is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a flexible screw thread armoured optical cable of micro-beam tubular has solved the inside problem that leads to transmission structure to receive the influence because of the extrusion unstability of armoured optical cable.

The technical scheme of the utility model is that: a micro-bundled tube type flexible thread armored optical cable comprising: oversheath, aramid yarn, microbeam pipe, colored optic fibre.

Generally, the colored optical fiber is selected from single mode optical fiber (optical fiber such as G652, G655 and G657) or multimode optical fiber (optical fiber such as OM1, OM2, OM3, OM4 and OM 5), and is classified by full color spectrum.

The multi-bearing-surface wiring harness is characterized in that a plurality of colored optical fibers are arranged into a bundle structure with a multi-edge cross section, a micro-bundle pipe is wrapped outside the bundle structure to form a cylindrical cable bundle, the micro-bundle pipe is low-smoke halogen-free polyolefin (L SZH) and can also be made of other soft plastic materials, the micro-bundle pipe (4-12 cores) is formed by three colored optical fibers which are tangentially arranged to form a base unit with a regular triangle cross section, the stability of the base unit with the regular triangle is good, and the base unit needs to have the capability of combining and overlapping.

An armor layer is sleeved outside the microbeam tube, and a supporting part protruding along the radial direction is arranged on the inner wall of the armor layer. The supporting part acts on the depressed part on the surface of the microbeam tube, and the supporting part can play a supporting effect and can also achieve the technical effect of avoiding relative rotation. Meanwhile, a structural gap is formed between the armor layer and the micro-beam tube, and the structural gap is filled with a foaming material to form a foaming buffer layer, so that the elasticity and the flexibility of the optical cable can be improved to a certain extent.

The outer part of the armor layer is sleeved with a braided layer made of metal wires, and the braided layer is made of stainless steel filaments or alloy filaments. The aramid yarn layer is bound outside the weaving layer, and a plurality of bundles of aramid yarns are wrapped outside the weaving layer and can be spirally twisted and laid or flatly laid.

The aramid yarn layer is tightly sleeved with an outer sheath, and the outer sheath is usually made of L SZH materials and can also be made of other materials such as PVC, flame-retardant PE and the like.

Preferably, the armor layer is a threaded armor pipe, the threaded armor pipe is made of stainless steel materials or alloy materials, and the outer diameter of the armor layer is (4-12 cores).

Preferably, the cylindrical cable bundle is further filled with a reinforcing member, and the reinforcing member is lined between the wire bundle and the inner wall of the micro-bundle tube.

Preferably, the reinforcing member is disposed outside the three colored optical fibers arranged side by side, and the surface of the reinforcing member is in contact with at least the colored optical fiber located in the middle.

Preferably, a plurality of supporting parts are provided, and the supporting parts correspond to the reinforcing parts; the rotary surface of the micro-beam tube is provided with a concave part which does not exceed the wall thickness of the micro-beam tube.

The utility model has the advantages that: the relative positions of a plurality of optical fibers (usually 4-12 cores) are well arranged, and the optical fibers are tightly wrapped by the micro-beam tube, so that the relative positions of the optical fibers can be solidified, the relative position change of the optical fibers is avoided, and the stable performance of the optical fibers in use is ensured.

Drawings

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

FIG. 1 is a cross-sectional view of a micro-bundled tube type flexible thread armored cable;

wherein: 1. an outer sheath; 2. aramid yarn; 3. a microbeam tube; 4. coloring the optical fiber; 5. an armor layer; 6. a support portion; 7. a foamed buffer layer; 8. weaving layer; 9. a reinforcement.

Detailed Description

The utility model discloses a preferred embodiment:

a micro-bundled tube type flexible thread armored optical cable comprising: the optical fiber comprises an outer sheath 1, aramid yarn 2, a microbeam tube 3 and a colored optical fiber 4. The plurality of colored optical fibers 4 are arranged in a bundle-like structure with a polygonal cross section, and the outside of the bundle-like structure is coated with the micro-bundle tube 3 to form a cylindrical cable bundle. The beam-shaped structure is formed by tangentially arranging three colored optical fibers 4 to form a base unit with a regular triangle section, the stability of the base unit with the regular triangle section is good, and the base unit needs to have the capability of combination and superposition. Arrange three colored optic fibre 4 side by side on every side of basic unit and form the pencil of many loading faces, can form the pencil that the cross-section is the hexagon through colored optic fibre 4's range, and the cross-section of this pencil has special effect, the long limit that forms is arranged to three optic fibre promptly and the minor face that forms is arranged to two optic fibre, long limit and minor face have formed interval distribution, consequently this pencil has support and bears two abilities, the supporting effect of minor face is comparatively outstanding, and the bearing effect on long limit then is superior to the minor face.

An armor layer 5 is sheathed outside the micro-beam tube 3, and a supporting part 6 protruding along the radial direction is arranged on the inner wall of the armor layer 5. The supporting part 6 acts on the depressed part on the surface of the microbeam tube 3, and the supporting part 6 can play a supporting effect and can also achieve the technical effect of avoiding relative rotation. Meanwhile, a structural gap is formed between the armor layer 5 and the micro-beam tube 3, and the structural gap is filled with a foaming material to form a foaming buffer layer 7, so that the elasticity and the flexibility of the optical cable can be improved to a certain extent.

The outer part of the armor layer 5 is sleeved with a braided layer 8 made of metal wires, and the braided layer 8 is made of stainless steel filaments or alloy filaments. Aramid yarns 2 are bound outside the woven layer 8, and the plurality of bundles of aramid yarns 2 are wrapped outside the woven layer 8 and can be spirally twisted and laid or flatly laid. The armor layer 5 is a threaded armor pipe, the threaded armor pipe is made of stainless steel materials or alloy materials, and the outer diameter of the armor layer is (4-12 cores).

The cylindrical cable bundle is also filled with a reinforcing member 9, and the reinforcing member 9 is lined between the wire harness and the inner wall of the micro-bundle tube 3. The reinforcing member 9 is disposed correspondingly outside the three colored optical fibers 4 arranged side by side, and the surface of the reinforcing member 9 is at least abutted against the colored optical fiber 4 located in the middle. The reinforcement 9 is arc-shaped, is made of soft plastic, has a protection effect through weak deformation, and can increase the arrangement compactness of the optical cable.

To sum up, this scheme microbeam tubular flexible thread armor optical cable includes the advantage lie in:

the material has excellent lateral pressure resistance, rat bite resistance, bending resistance and impact resistance, and simultaneously has good bending performance; the allowable minimum lateral pressure resistance is not less than 3000N;

2. temperature performance of the optical cable is stable, and using/storing temperature: -25 ℃ to 75 ℃;

3. the tensile resistance of the optical cable can be adjusted by increasing or reducing the dosage of the aramid yarn;

and 4, the allowable minimum bending radius is less than or equal to 5 times of the cable diameter (static state)/10 times of the cable diameter (dynamic state).

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

1. A micro-bundled tube type flexible thread armored cable comprising: the outer sheath, aramid yarn, micro-bundle tube and colored optical fiber; the method is characterized in that: a plurality of colored optical fibers are arranged into a bundle-shaped structure with a polygonal cross section; covering and sleeving the micro-beam outside the beam-shaped structure to form a cylindrical cable bundle; the beam-shaped structure is a basic unit with a regular triangle section formed by three colored optical fibers which are tangentially arranged; arranging three colored optical fibers side by side on each side of the base unit to form a wire harness with multiple bearing surfaces; sheathing an armor layer outside the microbeam tube; a supporting part protruding along the radial direction is arranged on the inner wall of the armor layer; the supporting part acts on the surface of the microbeam tube in the concave part; a structural gap is formed between the armor layer and the micro-beam tube; filling a foaming material in the structural gap to form a foaming buffer layer; a braided layer made of metal wires is sleeved outside the armor layer; an aramid yarn layer is bound outside the weaving layer; the outer sheath is tightly sleeved outside the aramid yarn layer.

2. The microbeam tube type flexible thread armored cable of claim 1, wherein: the armor layer is a threaded armor pipe.

3. The microbeam tube type flexible thread armored cable of claim 1, wherein: a reinforcing piece is filled in the cylindrical cable bundle; the stiffener lines between the wire harness and an inner wall of the microbeam tube.

4. The microbeam tubular flexible thread armored cable of claim 3, wherein: the reinforcing piece is correspondingly arranged on the outer sides of the three colored optical fibers which are arranged side by side, and the surface of the reinforcing piece at least abuts against the colored optical fibers in the middle.

5. The microbeam tube type flexible thread armored cable of claim 2, wherein: the supporting parts are provided in plurality and correspond to the reinforcing parts; the rotary surface of the micro-beam tube is provided with the concave part which does not exceed the wall thickness of the micro-beam tube.