CN112099161A - Optical cable without yarn binding - Google Patents

Abstract

The present invention discloses an optical cable without yarn binding, which comprises a central strength member (1), a plurality of cable cores (2) twisted outside the central strength member (1), and a plurality of the cables wrapped around the core strength member (1). Bonding ring (3) on the outside of the core (2). The optical cable without yarn binding of the present invention fixes the cable cores by arranging adhesive rings outside the plurality of cable cores, without yarn binding, which can effectively prevent the adverse effects caused by the yarn binding, and at the same time, the cable cores are easy to peel off. After cutting the bonding ring, a single cable core can be taken out, and other cable cores will not be affected and loosened.

Description

An optical cable without yarn

technical field

The invention relates to an optical cable, in particular to an optical cable without yarn binding.

Background technique

With the development of communication technology, the demand for optical cables is also increasing. The cable forming method in the prior art mainly adopts SZ twisting. A certain tension of the yarn binding will cause a certain extrusion of the fiber bundle tube to form a yarn binding mark, which will seriously lead to the large attenuation of the fiber and the appearance of steps and other phenomena. In addition, it is difficult to peel off the bundled tube in the subsequent construction. It is necessary to cut the tie yarns one by one to peel off the sleeves. After the tie yarns are cut, the remaining sleeves in the optical cable will also be in a loose state. Currently, the overhead line entry policy is being implemented. When the optical fiber cable is used underground, if the situation occurs, it will not be detected in time, which will easily cause information interruption and waste time in remediation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an optical cable that does not require yarn binding in view of the above-mentioned defects in the prior art, which can avoid the adverse effects caused by yarn binding.

In order to achieve the above purpose of the invention, the present invention proposes an optical cable without yarn binding, which includes a central strength member, a plurality of cable cores twisted outside the central strength member, and a plurality of cable cores wrapped outside the core strength member. Bond ring.

In addition, the present invention also proposes the following subsidiary technical solutions:

The number of the bonding rings is plural, and they are arranged outside the plural cable cores at intervals along the axis.

The bonding ring is arranged at the twisting reversal point.

The material of the adhesive ring is polyester resin.

The adhesive ring includes an outer ring layer surrounding the outer periphery of a plurality of the cable cores and an adhesive portion filled between two adjacent sleeves.

The fiber optic cable without tying also includes a sensing fiber arranged along the axial direction of the fiber optic cable.

The sensing fiber is fixed in the bonding ring.

Compared with the prior art, the advantages of the present invention are:

1. The optical cable without yarn binding of the present invention fixes the cable cores by arranging adhesive rings on the outside of the multiple cable cores, without the need for yarn binding, which can effectively prevent the adverse effects caused by the yarn binding. After peeling off and cutting the adhesive ring, a single cable core can be taken out, and other cable cores will not be affected by it and loosen.

2. In the present invention, the bonding rings are arranged on the optical cable at intervals, which can save materials and reduce costs. In addition, the bonding rings are made of polyester resin and are arranged outside the bundle tube by coating, which will not cause local damage to the sleeve. The yarn-tying mark is produced by the extrusion, which ensures the roundness of the sleeve and reduces the extrusion of the optical fiber. After coating, it is cured by ultraviolet light, and the operation is very convenient.

3. The optical cable without yarn binding of the present invention is also provided with a sensing optical fiber, which can alarm in time for abnormal conditions, reduce emergency repair time, and help ensure the reliable operation of the optical cable.

Description of drawings

FIG. 1 is a schematic structural diagram of an optical cable without yarn binding according to the present invention.

Fig. 2 is a front view of the optical cable without yarn binding according to the present invention.

Detailed ways

The technical solution of the present invention is further described in non-limiting detail below in conjunction with the preferred embodiments and the accompanying drawings.

As shown in FIG. 1 , an optical cable without yarn tying corresponding to a preferred embodiment of the present invention includes a central strength member 1 , a plurality of cable cores 2 stranded outside the central strength member 1 , and a plurality of cable cores 2 wrapped around a plurality of Bonding ring 3 on the outside of the cable core 2.

The central strength member 1 is located at the center of the optical cable, and a plurality of cable cores 2 are twisted around the outer circumference of the central strength member 1 in an SZ twisted manner. The central reinforcement 1 may be a metal reinforcement, such as stainless steel wire, or a non-metal reinforcement, such as FRP or KFRP.

In this embodiment, the number of cable cores 2 is 6, which includes a sleeve 20 and a plurality of optical fibers 21 located in the sleeve 20.

The central strength member 1 and the plurality of cable cores 2 form a bundled tube, and the adhesive ring 3 is wrapped outside the bundled tube by coating, as shown in FIG. 1 , the adhesive ring 3 is wrapped around and filled in the plurality of cable cores 2 The outer part, specifically, includes an outer ring layer 30 surrounding the outside of the bundle tube and a bonding part 31 extending between two adjacent sleeves 20 . The cross-sectional shape of the outer ring layer 30 is circular.

The adhesive ring 3 is made of a material with a certain viscosity. In this embodiment, the adhesive ring 3 is made of polyester resin. After a plurality of cable cores 2 are twisted on the outer periphery of the central strength member 1 by means of SZ twisting, the polyester resin is coated on the outside of the bundle tube by a coating device, and the polyester resin on the outer surface of the cable core is immediately passed through an ultraviolet curing furnace. After curing, the polyester resin has a covering force on the bundled tube to prevent the cable core 2 from loosening.

As shown in FIG. 2 , the bonding ring 3 does not need to coat the entire optical cable, and it can be arranged on the bundle tube at intervals along the axis of the optical cable. Preferably, the position of the bonding ring 3 is the reversal point of the twisting of the cable core. , its length is the same as the length of the reversing point or slightly larger than the length of the reversing point. By controlling the coating time, stranding pitch and production speed to match, the effect of applying polyester colloid at the turning point of stranding for fixing can be achieved.

As shown in FIG. 1 and FIG. 2 , the optical fiber cable without yarn binding of the present invention further includes a sensing optical fiber 4, the sensing optical fiber 4 is fixed in the bonding ring 3, and the sensing optical fiber 4 can be wound on the outside without twisting , but straight through the bonding ring 3 . The type of the sensing optical fiber 4 can be selected according to different situations. For example, when the temperature needs to be monitored, the sensing optical fiber 4 can be selected as the temperature sensing optical fiber. When the temperature of the optical cable is partially too high, combustion or other abnormalities may occur. Factors, the terminal connector can quickly determine the location and carry out abnormal investigation processing, which can be responded to at the first time, and emergency processing can be carried out, which is conducive to ensuring the reliable operation of communication. When other factors such as pressure, displacement, speed, voltage, etc. need to be monitored, a sensing fiber 4 with corresponding monitoring function can be selected.

It can be understood that the number of sensing fibers 4 may be multiple, and the factors monitored by the multiple sensing fibers 4 may also be different.

The optical cable without yarn binding of the present invention at least includes the following advantages:

1. The optical cable without yarn binding of the present invention fixes the cable cores by arranging adhesive rings on the outside of the multiple cable cores, without the need for yarn binding, which can effectively prevent the adverse effects caused by the yarn binding. After peeling off and cutting the adhesive ring, a single cable core can be taken out, and other cable cores will not be affected by it and loosen.

2. In the present invention, the bonding rings are arranged on the optical cable at intervals, which can save materials and reduce costs. In addition, the bonding rings are made of polyester resin and are arranged outside the bundle tube by coating, which will not cause local damage to the sleeve. The yarn-tying mark is produced by the extrusion, which ensures the roundness of the sleeve and reduces the extrusion of the optical fiber. After coating, it is cured by ultraviolet light, and the operation is very convenient.

3. The optical cable without yarn binding of the present invention is also provided with a sensing optical fiber, which can alarm in time for abnormal conditions, reduce emergency repair time, and help ensure the reliable operation of the optical cable.

It should be pointed out that the above-mentioned preferred embodiment is only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those who are familiar with the technology to understand the content of the present invention and implement it accordingly, and cannot limit the present invention. protected range. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (7)

1. An optical cable without yarn binding, characterized in that: it comprises a central strength member (1), a plurality of cable cores (2) stranded outside the central strength member (1), and a plurality of cable cores (2) wrapped around a plurality of all the core strength members (1). The adhesive ring (3) outside the cable core (2). 2 . The optical cable without yarn binding according to claim 1 , wherein the number of the bonding rings ( 3 ) is plural, and they are arranged outside the plural cable cores ( 2 ) at intervals along the axis. 3 . 3. The optical cable without yarn binding according to claim 2, characterized in that: the bonding ring (3) is arranged at the twisting reversal point. 4. The optical cable without yarn binding according to claim 1, characterized in that: the material of the bonding ring (2) is polyester resin. 5. The optical cable without yarn binding according to any one of claims 1 to 4, characterized in that: the bonding ring (2) comprises an outer ring layer (30) surrounding the outer periphery of the plurality of cable cores (2). ) and the bonding portion (31) filled between two adjacent sleeves (20). 6. The optical cable without yarn binding according to any one of claims 1 to 4, characterized in that: it further comprises a sensing optical fiber (4) arranged along the axial direction of the optical cable. 7. The optical cable without yarn binding according to claim 6, characterized in that: the sensing optical fiber (4) is fixed in the bonding ring (3).

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