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A drop optical cable for fttx

A technology for introducing optical cables and optical transmission, applied in the direction of fiber mechanical structure, etc., can solve the problems of poor load-bearing performance of central bundle tube optical cables, unsuitable for large-core structure, troublesome skeleton grooves, etc., to achieve high fiber core density, Branch introduction is convenient and the effect of saving process

Active Publication Date: 2016-06-01
STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the large-scale application of 3G and 4G networks, FTTX is advancing rapidly, and the demand for optical cables is increasing day by day, especially the demand for FTTX lead-in optical cables. The standard YD / T769 stipulates the structure of the central beam tube optical cable. Since the central beam tube optical cable has only one sleeve, the structure is relatively compact and the core density is high, but the load-bearing performance of the central beam tube optical cable is relatively low. Poor, steel wires are usually twisted outside the casing to protect the casing and the optical communication components in the casing. Steel wire twisting usually requires bulky twisting equipment, and the manufacturer's investment is relatively large; Communications of the Ministry of Posts and Telecommunications of the People's Republic of China The industry standard YD / T981 stipulates the structure of the skeleton optical cable. The skeleton optical cable has the advantage of being easy to branch and is especially suitable for FTTX applications. Manufacturers are looking forward to a new type of optical cable, which is not only small in size, excellent in load bearing performance, but also easy to branch, and can meet the requirements of large number of cores

Method used

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  • A drop optical cable for fttx
  • A drop optical cable for fttx
  • A drop optical cable for fttx

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] please see Figure 1 to Figure 4 ; A lead-in optical cable for FTTX, which includes a sleeve body 1, a sheath layer 2 that is extruded and coated outside the sleeve body, and is characterized in that the cavity in the sleeve body 11 of the sleeve body There is a light transmission element 12 in the middle, and there are 12 symmetrically distributed openings 14 on the outer circumference of the sleeve body, and a protective strip 15 is formed between adjacent openings; on any cross section: the symmetrical axis L of the opening passes through the sleeve body center, below each opening there is an accommodating chamber 13 connected to the opening, the accommodating chamber is not connected to the cavity accommodating the light transmission element, and the adjacent accommodating chambers are not connected Yes, the accommodating chambers are symmetrically distributed inside the casing body, the center of each accommodating chamber is located on the symmetrical axis L of th...

Embodiment 2

[0032] please see Figure 5 , and refer to Figure 1 to Figure 4 , a kind of lead-in optical cable for FTTX, basically the same as implementation example 1, the difference is that there is a groove 16 on the outer circumference of the sleeve body, and the groove is located on the protective strip between adjacent openings; when the groove exists , even if there are optical fibers or optical fiber ribbons with the same number of cores in the accommodating chamber, they can be easily identified at both ends or in the middle; at the same time, they can be conveniently positioned during production.

Embodiment 3

[0034] please see Figure 6 , and refer to Figure 1 to Figure 4 , a lead-in optical cable for FTTX, which includes a sleeve body 1, a protective layer 4 coated outside the sleeve body, a sheath layer 2 that is extruded and coated outside the protective layer 4, and is characterized in that the sleeve There is a light transmission element 12 in the cavity inside the sleeve body 11 of the body, and there are a plurality of symmetrically distributed openings 14 on the outer circumference of the sleeve body, and a protective strip 15 is formed between adjacent openings; on any cross section : The axis of symmetry L of the opening passes through the center of the sleeve body, and there is an accommodating chamber 13 connected to the opening below each opening. Adjacent accommodating chambers are not connected, and the accommodating chambers are symmetrically distributed in the casing body, and the center of each accommodating chamber is located on the symmetrical axis L of the co...

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Abstract

The invention belongs to the field of cable technology, and in particular relates to a lead-in optical cable for FTTX, which includes a sleeve body and a sheath layer, and is characterized in that the cavity inside the sleeve body of the sleeve body has optical transmission There are openings on the outer circumference of the sleeve body, and protective strips are formed between adjacent openings; on any cross-section: the symmetrical axis L of the opening passes through the center of the sleeve body, and each opening has a Connected accommodating chambers, the accommodating chambers are not communicated with the cavity accommodating the optical transmission element, and adjacent accommodating chambers are not connected, and the accommodating chambers are symmetrically distributed in the sleeve body , the width of the accommodating chamber increases gradually; there are reinforcing elements in the accommodating chamber. The invention has the following main beneficial effects: higher fiber core density, more convenient branch introduction, no need for complicated and expensive strengthening element stranding equipment, more reliable fixing of the strengthening element, fewer production processes, thinner outer diameter of the optical cable, and lower cost lower.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to an incoming optical cable for FTTX. Background technique [0002] With the large-scale application of 3G and 4G networks, FTTX is advancing rapidly, and the demand for optical cables is increasing day by day, especially the demand for FTTX lead-in optical cables. The standard YD / T769 stipulates the structure of the central beam tube optical cable. Since the central beam tube optical cable has only one sleeve, the structure is relatively compact and the core density is high, but the load-bearing performance of the central beam tube optical cable is relatively low. Poor, steel wires are usually twisted outside the casing to protect the casing and the optical communication components in the casing. Steel wire twisting usually requires bulky twisting equipment, and the manufacturer's investment is relatively large; Communications of the Ministry of Posts and Telecommunicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
Inventor 李勇刚卢京祥徐延波刘祥波刘长锋韩邦东王家武冷冰赵佃云卢兴旺陈义波周子超
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY