WO2023108309A1

WO2023108309A1 - Multi-core pressure-resistant optical cable

Info

Publication number: WO2023108309A1
Application number: PCT/CN2021/137315
Authority: WO
Inventors: 周兴华
Original assignee: 江苏华脉新材料有限公司
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2023-06-22

Abstract

Provided is a multi-core pressure-resistant optical cable, comprising: optical fiber units and a jacket (1), wherein a through hole (3) is concentrically formed in the jacket (1); the optical fiber units are respectively pre-embedded in an inner wall of the jacket (1) in a lengthwise direction of the jacket (1), each optical fiber unit comprising an optical fiber (5) and a loose tube (4), and the optical fiber (5) being arranged in the loose tube (4); the optical fiber units are distributed around the through hole (3) in an annular array; and the jacket (1) is provided with arc slots (2) located between the optical fiber units and an outer circle of the jacket (1), the arc slots (2) extending in the lengthwise direction of the jacket (1). In the multi-core pressure-resistant optical cable, the arc slots (2) are specially designed in the inner wall of the jacket (1), and the arc slots (2) corresponding to the optical fiber units on a one-to-one basis will elastically deform when the jacket (1) is squeezed, such that pressure buffering is achieved in order to reduce damage to the optical fiber units, thereby strengthening the pressure-resistant protection of the optical cable.

Description

A multi-core anti-pressure optical cable

technical field

The utility model relates to the technical field of optical cables, in particular to a multi-core anti-pressure optical cable.

Background technique

Optical cable is a communication cable assembly that uses multiple optical fibers placed in a sheath as the transmission medium. In today's society with the rapid development of the Internet, optical cables are widely used.

All walks of life are inseparable from the Internet, so optical cables need to be installed in various usage environments, and complex usage environments put forward higher requirements for the tensile and compressive capabilities of optical cables. In the prior art, strengthening cores are often used to strengthen the tensile strength of the optical cable, but the compressive capacity is ignored. During use, the optical cable is often easily crushed and damaged, which needs to be improved.

Utility model content

The purpose of the utility model is to provide a multi-core anti-pressure optical cable, which improves the anti-pressure performance of the optical cable and reduces the problem of being flattened and damaged.

For this purpose, the utility model adopts the following technical solutions:

A multi-core pressure-proof optical cable, comprising: an optical fiber unit and a sheath, wherein a through hole is concentrically arranged in the sheath, and the optical fiber units are respectively pre-embedded in the inner wall of the sheath along the length direction of the sheath, and the optical fiber unit includes An optical fiber and a loose tube, the optical fiber is arranged in the loose tube, the annular array of the optical fiber units is distributed around the through hole, and the sheath is provided with an arc groove between the optical fiber unit and the outer circle of the sheath. The arc groove extends along the length direction of the sheath.

Wherein, a central reinforcing core is arranged in the through hole.

Wherein, the central reinforcing core adopts steel wire.

Wherein, the arc groove is concentric with the through hole.

Wherein, the loose tube is filled with fiber paste.

Wherein, the sheath adopts a polyethylene sheath.

Beneficial effects of the utility model: a multi-core anti-pressure optical cable, specially designed arc grooves in the inner wall of the sheath, using the arc grooves corresponding to the optical fiber units one by one to carry out elastic deformation when the sheath is squeezed, Realize the pressure buffer, reduce the damage of the optical fiber unit, and strengthen the anti-pressure protection of the optical cable.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is another structural schematic diagram of the utility model.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with Fig. 1 to Fig. 2 and through specific embodiments.

Example 1:

As shown in Figure 1, a multi-core pressure-proof optical cable includes: an optical fiber unit and a sheath 1, and a through hole 3 is concentrically arranged in the sheath 1 to reduce its own weight. Elastic deformation is carried out when the extrusion force is applied to achieve pressure buffering.

The sheath 1 is made of polyethylene sheath. The polyethylene sheath is extruded and has good waterproof and insulation effects. It is also resistant to low temperature, has low water absorption, and has certain toughness. It can be bent for flexible construction of optical cables.

In this application, four optical fiber units are pre-embedded in the inner wall of the sheath 1 along the length direction of the sheath respectively, and the optical fiber units include an optical fiber 5 and a loose tube 4, and a plurality of optical fibers 5 are respectively arranged in the loose tube 4, The performance of communication transmission has been improved. The loose tube 4 is filled with fiber paste, and the optical fiber 5 is waterproofed and resistant to hydrogen evolution through the fiber paste.

The circular array of four optical fiber units is distributed around the through hole 3, and the sheath 1 is provided with an arc groove 2 between the optical fiber unit and the outer circle of the sheath 1, and the arc groove 2 is along the length direction of the sheath 1 In this embodiment, the arc groove 2 corresponds to the optical fiber unit. When the sheath 1 is squeezed, the arc groove 2 undergoes elastic deformation, and together with the through hole 3, it buffers the pressure and reduces the Damage to the fiber optic unit.

In this embodiment, the arc grooves 2 are concentric with the through hole 3 , the arc grooves 2 are evenly distributed, and can withstand extrusion forces from multiple directions.

Example 2:

As shown in Figure 2, on the basis of Embodiment 1, a central reinforcing core 6 is provided in the through hole 3 to improve the tensile performance of the sheath 1. In this embodiment, the central reinforcing core 6 is made of steel wire , high structural strength, good tensile effect.

The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.

Claims

A multi-core pressure-proof optical cable, characterized in that it includes: an optical fiber unit and a sheath, wherein a through hole is concentrically arranged in the sheath, and the optical fiber units are respectively pre-embedded in the inner wall of the sheath along the length direction of the sheath. The optical fiber unit includes an optical fiber and a loose tube, the optical fiber is arranged in the loose tube, the annular array of the optical fiber unit is distributed around the through hole, and a circle between the optical fiber unit and the outer circle of the sheath is arranged in the sheath an arc groove, and the arc groove extends along the length direction of the sheath.
The multi-core anti-pressure optical cable according to claim 1, wherein a central strengthening core is arranged in the through hole.
The multi-core anti-pressure optical cable according to claim 2, wherein the central strengthening core is made of steel wire.
The multi-core anti-pressure optical cable according to claim 1, characterized in that, the arc groove is concentric with the through hole.
The multi-core anti-pressure optical cable according to claim 1, wherein the loose tube is filled with fiber paste.
The multi-core anti-pressure optical cable according to claim 1, wherein the sheath is a polyethylene sheath.