CN216387515U

CN216387515U - Prestressed strain optical cable

Info

Publication number: CN216387515U
Application number: CN202123193869.7U
Authority: CN
Inventors: 付艳; 秦春燕
Original assignee: Dongguan Finecom Technology Co ltd
Current assignee: Dongguan Finecom Technology Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-04-26
Anticipated expiration: 2031-12-20

Abstract

The utility model discloses a prestressed strain optical cable, and relates to the technical field of optical cables. The optical fiber strain tight-packed fiber comprises a strain tight-packed optical fiber, wherein a spiral armor pipe is sleeved on the periphery of the strain tight-packed optical fiber; the outer sheath is positioned on the peripheral side of the strain tightly-packed optical fiber, and the inner side wall of the outer sheath is provided with a stainless steel wire stranded layer. According to the utility model, the spiral armor pipe is tightly contacted with the stainless steel wire stranded layer and the outer sheath, so that external stress change can be transmitted in real time, and the arrangement of the spiral armor pipe protects the strain tight-packed optical fiber, so that the optical cable is suitable for a severe monitoring environment.

Description

Prestressed strain optical cable

Technical Field

The utility model belongs to the field of optical cable technology, and particularly relates to a prestressed strain optical cable.

Background

The optical cable uses one or more optical fibers as transmission medium in the covering sheath and can be used individually or in groups, the optical cable is mainly composed of optical fiber, plastic protective sleeve and plastic outer skin, and the optical cable does not contain metals such as gold, silver, copper and aluminum. The optical cable is a communication line which is formed by a certain number of optical fibers according to a certain mode to form a cable core, is coated with a sheath, and is also coated with an outer protective layer for realizing optical signal transmission.

Some existing optical cables need to be placed in a relatively severe monitoring environment, such as in a concrete pouring occasion like a dam, a foundation pit and the like, the optical cables need to be buried, embedded and the like, and when the existing optical cables are arranged in the places such as large-scale building health condition monitoring, geological settlement, pipeline deformation and the like, the optical fibers can be damaged due to the fact that no protection device is arranged, and then the use of the optical cables can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a prestressed strain optical cable, which solves the technical problem that optical fibers in the existing optical cable are easy to damage.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a prestressed strain optical cable comprises a strain tightly-packed optical fiber, wherein a spiral armor tube is sleeved on the periphery of the strain tightly-packed optical fiber;

the outer sheath is positioned on the peripheral side of the strain tightly-packed optical fiber, and a stainless steel wire stranded layer is arranged on the inner side wall of the outer sheath;

and the curing glue is positioned inside the stainless steel wire stranding layer.

Optionally, the strain tightly-wrapped optical fiber is located in the curing glue, and the spiral armored pipe is located in the curing glue.

Optionally, a stainless steel wire stranded layer is positioned between the cured glue and the outer sheath.

Optionally, the strain tight fiber is positioned between the stainless steel stranded layer and the spiral armor tube.

Optionally, a layer of stainless steel wire strands is positioned between the outer jacket and the strain-tight coated optical fiber.

Optionally, a plurality of through holes are formed in the stainless steel wire stranding layer.

The embodiment of the utility model has the following beneficial effects:

according to the embodiment of the utility model, the spiral armor tube is tightly contacted with the stainless steel wire stranded layer and the outer sheath, so that external stress change can be transmitted in real time, and the arrangement of the spiral armor tube protects the strain tight-packed optical fiber, so that the optical cable is suitable for a severe monitoring environment.

Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 2 is a structural diagram of a cured cement according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

the cable comprises an outer sheath 1, a stainless steel wire stranded layer 2, a strain tight-packed optical fiber 3, a spiral armored pipe 4 and a curing adhesive 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

Referring to fig. 1-2, in the present embodiment, a prestressed strain cable is provided, including: the strain tight-packed optical fiber 3 is sleeved with a spiral armor tube 4 on the peripheral side of the strain tight-packed optical fiber 3;

the outer sheath 1 is positioned on the peripheral side of the strain tightly-packed optical fiber 3, and the inner side wall of the outer sheath 1 is provided with a stainless steel wire stranded layer 2;

and the curing adhesive 5 is positioned inside the stainless steel wire stranded layer 2.

The strain tight-packaged optical fiber 3 and the spiral armor tube 4 are in a free state, glue is fixed between the strain tight-packaged optical fiber 3 and the spiral armor tube 4 within a certain length interval (generally 0.5 meter, 1 meter, 1.5 meter, 3 meters and the like) according to user requirements to form a fixed-point strain measurement interval, the strain length can be calculated according to the strain rate of the interval optical fiber, when the optical cable is produced, the strain tight-packaged optical fiber 3 can generate uniform prestress 500-2000 micro strain according to the user requirements, and when a measured object shrinks, the strain can be accurately measured.

Through the close contact between spiral armour pipe 4 and stainless steel wire stranded layer 2 and oversheath 1, can transmit outside stress variation in real time, spiral armour pipe 4's setting is protected to the tight package optic fibre 3 of strain for the optical cable is fit for more abominable monitoring environment.

A prestressed internal fixed point type armored strain optical cable is a stress and strain sensing optical cable researched by the principle of BOTDR and BOTDA, and the optical cable consists of a central micro-strain sensing optical fiber, a spiral armored pipe, a steel wire stranded layer reinforcing piece and a PE (polyethylene) sheath.

Please refer to fig. 1, the strain tightly-wrapped optical fiber 3 of the embodiment is located in the curing glue 5, the spiral armor tube 4 is located in the curing glue 5, the stainless steel wire twisted layer 2 is located between the curing glue 5 and the outer sheath 1, the strain tightly-wrapped optical fiber 3 is located between the stainless steel wire twisted layer 2 and the spiral armor tube 4, the stainless steel wire twisted layer 2 is located between the outer sheath 1 and the strain tightly-wrapped optical fiber 3, and a plurality of through holes are formed in the stainless steel wire twisted layer 2, so that the strain tightly-wrapped optical fiber 3 is conveniently protected by the spiral armor tube 4.

The above embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims

1. A pre-stressed strain cable, comprising:

the strain tight-packed optical fiber (3), wherein a spiral armor tube (4) is sleeved on the periphery of the strain tight-packed optical fiber (3);

the outer sheath (1), the outer sheath (1) is located on the periphery of the strain tightly-packed optical fiber (3), and the inner side wall of the outer sheath (1) is provided with a stainless steel wire stranded layer (2);

and the curing glue (5), and the curing glue (5) is positioned inside the stainless steel wire stranding layer (2).

2. A pre-stressed strain cable according to claim 1, wherein the strain tight coated optical fibre (3) is located within a curing glue (5) and the spiral armour tube (4) is located within the curing glue (5).

3. A pre-stressed strain cable according to claim 1, wherein the stainless steel stranded layer (2) is located between the cured glue (5) and the outer sheath (1).

4. A pre-stressed strain cable according to claim 1, wherein the strain tight fibre (3) is located between the stainless steel stranded layer (2) and the spiral armour tube (4).

5. A pre-stressed strain cable according to claim 1, wherein the stainless steel wire stranded layer (2) is located between the outer sheath (1) and the strain tight coated optical fibre (3).

6. A prestressed strain cable as claimed in claim 1, wherein the stainless steel stranded layer (2) has a plurality of through holes formed therein.