Central tube type composite optical cable

A technology of composite optical cable and central bundle tube, which is applied in the direction of fiber mechanical structure, etc., can solve the problems of small communication capacity, poor pressure resistance performance and fiber breakage of optical cable, and achieve the effect of reducing requirements, good pressure resistance performance and cost saving

Inactive Publication Date: 2010-02-10
沈群华
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GYXTW optical cable is placed in the center of the optical cable bundle tube, a plurality of optical fibers are arranged in the bundle tube, and two strength members are placed symmetrically along the axial direction of the bundle tube outside the bundle tube, so as to bear the pulling force; however, because it is only There are two directions to protect the bundle tube, so the pressure resistance is poor; moreover, because the bundle tube and the steel wire are only placed in parallel, the bundle tube will shrink greatly when the temperature changes cyclically. Causes abnormal breakage of optical fiber at the splice box
In addition, since there is only one bundle tube in the existing central bundle tube type optical cable, and there are only optical fibers in the bundle tube, the communication capacity of the optical cable is relatively small

Method used

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  • Central tube type composite optical cable
  • Central tube type composite optical cable
  • Central tube type composite optical cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] please see figure 1 , a central beam tube type optical cable composite optical cable, which includes a circular central beam tube 3, which contains an optical fiber 1 and an internal water blocking object 2, along the outer wall of the central beam tube with the axis of the central beam tube as the center, extending longitudinally and The reinforcing member 4 is covered with a unidirectional spiral or a clockwise / counterclockwise alternate direction spiral, the reinforcing member 4 is provided with a protective layer 7, and there is an external water blocking object 6 in the gap between the protective layer 7 and the central bundle tube , the protective layer 7 is provided with a sheath layer 8; it is characterized in that: the reinforcing member 4 contains at least two optical or electrical conduction units 9, and the reinforcing member 4 also includes fillers 5, which are symmetrically distributed in the center Outside the bundle tube, the pitch of the helix is ​​300m...

Embodiment 2

[0023] please see figure 2 , which is basically the same as that of Example 1, except that the number of optical fibers is changed from 8 to 12, and one filler is replaced by a reinforcement; the filler is asymmetrically distributed outside the central beam tube.

Embodiment 3

[0025] please see image 3 , basically the same as the implementation example 2, the difference is that: the number of optical fibers has changed from two 6-core fiber ribbons to three 4-core fiber ribbons; one of the strengthening members is replaced by an optical or electrical conduction unit; and there are 2 other The root fillers are replaced by reinforcements, the reinforcements are symmetrically distributed outside the central bundle tube, and the fillers and reinforcements are asymmetrically distributed outside the central bundle tube.

[0026] In the present invention, since the reinforcing member is in direct contact with the central bundle tube and tightly wrapped on the central bundle tube in a spiral manner, it effectively prevents the shrinkage of the central bundle tube when the temperature cycle changes, so that the optical fibers in the splice box will not be affected by temperature. Changes and easy to break; in addition, because non-metallic fillers are inclu...

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PUM

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Abstract

The invention relates to a central tube type composite optical cable in the technical field of optical cables. The central tube type composite optical cable comprises a central tube (3) which containsa light-guide fiber (1) and an internal water repellent substance (2), the central tube (3) extends longitudinally along the central tube external wall with the central tube as center, and enwraps areinforcing member (4) in a spiral manner, a jacket layer (8) is arranged outside a protective layer (7); the invention is characterized in that the reinforcing member (4) at least comprises one pieceof optical or electrical conductive unit (9). In the invention, the shrinkage of the central tube during change of temperature is effectively restrained, and the light-guide fiber is protected; self-weight of the optical cable is greatly reduced, the requirements of the pole and tower and the foundation thereof are lowered, and the cost is remarkably reduced; the pressure resistance of the optical cable is better; and not only optical signals, electrical signals and power can be transmitted, but also the capacity of optical communication can be larger.

Description

technical field [0001] The invention relates to the technical field of optical cables, in particular to a central bundle tube type composite optical cable. Background technique [0002] The communication industry standard of the People's Republic of China "YD / T769-2003 Core Network Optical Cable Center Bundle Tube Communication Outdoor Optical Cable" stipulates the structure of the optical cable, and the listed models include GYXTY, GYXTA, GYXTS, GYXTW, etc., among which GYXTY , GYXTA and GYXTS optical cables are in the form of a central beam tube, the optical fiber is placed in the tube, and a full circle of steel wire is wrapped around the tube; although this structure effectively protects the optical cable, it consumes a lot of steel. Therefore, the weight of the entire optical cable is relatively heavy. When multiple optical cables are placed on the tower, the tower will bear a lot of force, so the material and foundation of the tower also need to be very strong. GYXTW ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
Inventor 沈群华
Owner 沈群华
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