CN114121373A

CN114121373A - 8-shaped framework type air-blowing composite optical cable

Info

Publication number: CN114121373A
Application number: CN202111373891.1A
Authority: CN
Inventors: 刘为; 刘喆驰; 阎浩
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-03-01
Anticipated expiration: 2041-11-19
Also published as: CN114121373B

Abstract

The invention discloses an 8-shaped framework type air-blowing composite optical cable, which belongs to the technical field of optical cables. The 8-shaped framework type air-blowing composite optical cable is simple in structure and convenient and fast to prepare, at least one pipeline and/or channel for air-blowing laying of the air-blowing optical cable can be formed in the optical cable after the composite optical cable is suspended and arranged, the composite optical cable can be laid in a corresponding air-blowing laying mode after arrangement, a new optical cable is prevented from being laid beside the composite optical cable, the procedure of laying a newly-added optical cable is simplified, the cost is saved, the disordered situation during laying of the optical cable is effectively avoided, the urban landscape after laying of the optical cable is improved, and the 8-shaped framework type air-blowing composite optical cable has good application prospect and popularization value.

Description

8-shaped framework type air-blowing composite optical cable

Technical Field

The invention belongs to the technical field of optical cables, and particularly relates to an 8-shaped framework type air-blowing composite optical cable.

Background

With the development of communication technology, people have higher and higher requirements on communication quality, and optical cables for optical fiber communication are also provided with higher and higher requirements. Under the general condition, according to the difference of the optical cable laying mode, the optical cable can be divided into a pipeline optical cable, a direct-buried optical cable, an aerial optical cable and a water bottom optical cable, and the existing urban optical cable laying mode usually adopts the pipeline optical cable, the direct-buried optical cable or the water bottom optical cable because the space above the ground is not invaded and the influence on urban landscapes is small, so that the application of the aerial optical cable is relatively less. However, the aerial optical cable has the advantages of convenience in arrangement and maintenance, so that the aerial optical cable still has obvious advantages in application scenes without strict limitation on aerial laying, such as laying of the optical cable in application scenes in suburbs and the like.

However, in the process of laying optical cables, the situation of adding optical cable lines is often encountered, and for the above situation, it is a common practice to lay optical cables again beside the existing lines, which can meet the requirements of practical application to a certain extent, but the above manner has high requirements for construction, long construction period, and high setting cost. Meanwhile, for the directly buried optical cable or the pipeline optical cable, the laying of a new line needs to involve the excavation of the ground or the road surface, which increases the laying difficulty of the new line to a certain extent.

In addition, in the laying process of the existing optical cable, the situation that a power line or a signal line needs to be arranged at the same time is often encountered, and for the situation, the power line or the signal line is usually wrapped in the optical cable at the same time, so that the application requirement can be met to a certain extent, but for the optical cable, the power is often cut off in advance when the subsequent wire stripping and splitting are carried out, otherwise, the risk of electric shock possibly exists, and serious safety accidents are caused; moreover, for the optical cable that sets up signal line and power line simultaneously, its power line and signal line itself are not convenient for the air-blowing to lay, and the transposition degree of difficulty in the air-blowing optical cable structure is also great, and then leads to current optical cable to hardly satisfy practical application's demand.

Disclosure of Invention

Aiming at one or more of the defects or the improvement requirements in the prior art, the invention provides the 8-shaped framework type air-blowing composite optical cable which can form at least one reserved channel in the suspension type composite optical cable, so that the air-blowing laying of the air-blowing optical cable can be carried out after the suspension arrangement of the composite optical cable, the re-laying of the newly-added optical cable is avoided, the arrangement process of the newly-added optical cable is simplified, and the arrangement difficulty and the arrangement cost of the newly-laid optical cable are reduced.

To achieve the above object, according to one aspect of the present invention, there is provided an 8-shaped skeletal air-blown composite optical cable comprising a first cable part and a second cable part;

the first cable part comprises a framework and a first outer sheath arranged on the periphery of the framework; a plurality of framework grooves are formed in the outer peripheral ring of the framework at intervals upwards, each framework groove extends longitudinally along the framework, and the plurality of framework grooves comprise at least one first framework groove and at least one second framework groove; an optical fiber unit or a cable is laid in the first framework groove along the longitudinal direction of the framework; the second framework groove is a reserved groove; air-blown laying for air-blown optical cables;

the second cable part is a suspension part of the composite optical cable, is arranged above the first cable part, and comprises a power line extending along the longitudinal direction of the composite optical cable and a second outer sheath covering the periphery of the power line;

the first outer sheath and the second outer sheath are connected into an integral structure through a transition section to form the framework type air-blowing composite optical cable with the cross section being 8-shaped.

As a further development of the invention, the middle part of the carcass is provided with a carcass reinforcement or an air blowing tube extending in its longitudinal direction.

In another aspect of the present invention, there is provided an 8-shaped skeletal air-blown composite optical cable comprising a first cable part and a second cable part;

the second cable part is a suspension part of the composite optical cable, is arranged above the first cable part, and comprises an air blowing pipe extending along the longitudinal direction of the composite optical cable and a second outer sheath covering the periphery of the air blowing pipe;

As a further improvement of the invention, a power line and/or a signal line is arranged in the framework; and is

The power line and/or the signal line are/is laid in the first framework groove along the longitudinal direction of the framework;

or

The power line sets up the middle part of skeleton, it sets up along skeleton longitudinal extension, and with the skeleton forms overall structure.

As a further improvement of the present invention, the power line is disposed in the first skeleton groove, and a skeleton reinforcing member or an air blowing pipe is disposed in a middle portion of the skeleton extending in a longitudinal direction thereof.

As a further improvement of the present invention, the surface roughness of the inner peripheral wall surface of the second skeleton groove is less than 1.0 μm.

As a further improvement of the invention, the skeleton grooves are C-shaped grooves which are sequentially arranged at intervals in the upward direction of the outer peripheral ring of the skeleton, and the opening width of the C-shaped groove is not more than the maximum value of the opening width of the C-shaped groove.

As a further improvement of the invention, sheath reinforcements are symmetrically arranged in the first outer sheath, and the two sheath reinforcements are respectively arranged at two horizontal sides of the framework.

As a further improvement of the invention, a water-blocking layer is further arranged between the framework and the first outer sheath, and is formed by wrapping a water-blocking tape on the periphery of the framework and used for packaging the optical fiber unit or the cable in the first framework groove.

As a further improvement of the invention, a reinforcing layer and/or an armor layer is/are also arranged between the water-resistant layer and the first outer sheath;

the reinforcing layer is obtained by sequentially winding and wrapping a damp-proof aluminum strip on the periphery of the water-resistant layer; the armor layer is formed by sequentially winding and coating the FRP belt or the aramid fiber belt on the periphery of the waterproof layer or the periphery of the reinforcing layer.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the technical scheme conceived by the invention has the following beneficial effects:

(1) according to the 8-shaped framework type air-blowing composite optical cable, the first cable part and the second cable part are arranged, the composite optical cable in the 8 shape can be correspondingly formed through the composite arrangement of the two cable parts, the optical cable is suspended and arranged, at least one pipeline or channel for laying the air-blowing optical cable is formed in the composite optical cable, convenience and possibility are provided for the arrangement of the newly added cables, and then after the composite optical cable is suspended and arranged, the air-blowing optical cable can be arranged in the second framework groove in an air-blowing laying mode, so that the arrangement process of the newly added cables is simplified, the arrangement difficulty and the laying cost of the newly added cables are reduced, and the attractiveness of the arrangement of the composite optical cable is improved.

(2) According to the 8-shaped framework type air-blowing composite optical cable, the power line is arranged in the middle of the second cable part, the middle of the framework or is independently arranged in the first framework groove, so that photoelectric separation in the composite optical cable can be accurately realized, the safety and reliability of related operation after the composite optical cable is laid are ensured, the machine room power failure caused by subsequent operation of the optical cable is avoided, and the convenience and safety of the composite optical cable in arrangement and use are improved.

(3) According to the 8-shaped framework type air-blowing composite optical cable, the air-blowing pipes are arranged in the middle of the framework and/or the middle of the second cable part, so that reserved pipelines can be further added in the composite optical cable, and convenience is further provided for laying of the subsequent air-blowing optical cable; correspondingly, the sheath reinforcing parts are symmetrically arranged in the first outer sheath, so that the tensile strength of the composite optical cable can be fully ensured when the framework reinforcing part is not arranged in the middle of the framework, and the use reliability of related cables in the composite optical cable is guaranteed.

(4) According to the 8-shaped framework type air-blowing composite optical cable, the framework reinforcing piece is arranged in the middle of the framework, so that the strength of the framework can be further enhanced, the laying reliability of related cables after the framework grooves are longitudinally formed is fully ensured, the optical fiber units or the related cables are prevented from being broken due to the tensile deformation of the composite optical cable, and the setting reliability and stability of the framework type air-blowing composite optical cable are further improved; of course, the corresponding arrangement of the sheath reinforcing part in the first outer sheath can further improve the overall tensile strength of the composite optical cable and the comprehensive performance of the optical cable.

(5) The 8-shaped framework type air-blowing composite optical cable is simple in structure and convenient and fast to prepare, and can accurately realize suspension laying of the composite optical cable, so that a cable part for suspension can be correspondingly provided with a power line or a laying pipeline of the air-blowing optical cable while bearing and suspending, and the functionality of the 8-shaped composite optical cable is greatly improved; and, through corresponding first skeleton groove and the second skeleton groove of setting up in first cable portion for form at least one pipeline and/or the channel that is used for the air-blowing optical cable air-blowing to lay on the skeleton, guarantee that composite optical cable can carry out laying of corresponding optical cable through the mode of air-blowing laying after setting up, avoided laying new optical cable again beside composite optical cable, simplified the process that newly increases optical cable and lay, the cost is saved, mixed and disorderly circumstances when also effectively having avoided optical cable to lay appears, the city view after the optical cable is laid has been promoted, have better application prospect and spreading value.

Drawings

FIG. 1 is a schematic structural view of an 8-shaped framework air-blown composite optical cable according to example 1 of the present invention;

FIG. 2 is a schematic view of a skeleton structure of an 8-shaped skeleton-type air-blown composite optical cable according to example 1 of the present invention;

FIG. 3 is a schematic structural view of an 8-shaped framework type air-blown composite optical cable according to embodiment 2 of the present invention;

FIG. 4 is a schematic structural view of an 8-shaped framework air-blown composite optical cable according to example 3 of the present invention;

FIG. 5 is a schematic diagram of a framework structure of an 8-shaped framework type air-blown composite optical cable according to example 3 of the present invention;

FIG. 6 is a schematic structural view of an 8-shaped framework air-blown composite optical cable according to example 4 of the present invention;

FIG. 7 is a schematic diagram of a framework structure of an 8-shaped framework type air-blown composite optical cable according to example 4 of the present invention;

FIG. 8 is a schematic structural view of an 8-shaped skeletal air-blown composite optical cable according to example 5 of the present invention;

FIG. 9 is a schematic view of a skeleton structure of an 8-shaped skeleton type air-blown composite optical cable according to example 5 of the present invention;

FIG. 10 is a schematic structural view of an 8-shaped skeletal air-blown composite optical cable according to example 6 of the present invention;

FIG. 11 is a schematic view of a skeleton structure of an 8-shaped skeleton-type air-blown composite optical cable according to example 6 of the present invention;

in all the figures, the same reference numerals denote the same features, in particular:

1. a framework; 2. a water resistant layer; 3. an armor layer; 4. an outer sheath;

101. a first skeleton groove; 102. a second skeleton groove; 103. a carcass reinforcement; 104. a power line; 105. an air blowing pipe; 106. marking a line; 401. a first outer jacket; 402. a second outer sheath; 403. a transition section; 404. a jacket reinforcement.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 11, the 8-shaped skeleton-type air-blown composite optical cable according to the preferred embodiment of the present invention includes a first cable portion and a second cable portion disposed above the first cable portion, the outermost cable portions are respectively an outer sheath 4, i.e., a first outer sheath 401 and a second outer sheath 402, and the two cable portions are connected to each other by a transition section 403 between the first outer sheath 401 and the second outer sheath 402 to form an integral structure, so as to form the 8-shaped composite optical cable shown in fig. 1, 3, 4, 6, 8, and 10.

For two cable parts of the composite optical cable, wherein the first cable part is of a framework type cable structure, a framework 1 is arranged in the middle of the first cable part, and a channel and/or a pipeline for accommodating various cables are formed; the second cable part is a suspension part for aerial laying of the whole composite optical cable, and the suspension part can be clamped and laid in the air by matching with a corresponding clamp to form the aerial optical cable.

Meanwhile, for the second cable part in the preferred embodiment, the greatest difference from the conventional 8-shaped optical cable is that the second cable part is provided with the power line 104 or is provided with a pipeline for air-blowing laying, that is, the second cable part can not only function as a suspension part, but also function as a cable or an air-blowing cable.

In fact, by disposing the power line 104 in the second cable portion, as shown in fig. 1 and fig. 3, it is possible to sufficiently achieve the separation of the optical unit and the electrical unit in the composite optical cable, achieve the photoelectric separation in the optical cable, further ensure the safety of the composite optical cable during the subsequent optical unit branching and air-blowing optical cable laying, ensure that the power supply operation process of the composite optical cable can be free from the influence of the optical fiber related operation process, and ensure the safety of the arrangement and use of the composite optical cable.

Of course, in the preferred embodiment, in addition to the power line 104 being disposed in the second cable part, it may also be disposed in the first cable part, and the photoelectric separation is realized by performing a preferred arrangement on the structure of the first cable part, which will be described in detail later, and will not be described herein again.

Specifically, for the first cable part in the preferred embodiment, it preferably includes a framework 1, a water blocking layer 2, an armor layer 3, and a first outer sheath 401, which are arranged in this order from inside to outside. Among them, the frame 1 is preferably made of PE material, has a certain strength, and can satisfy a certain tensile strength and bending strength, and is more preferably formed by extrusion molding. Meanwhile, the outer circumferential ring of the bobbin 1 in the preferred embodiment is provided with a plurality of bobbin grooves, i.e., a first bobbin groove 101 and a second bobbin groove 102, spaced upward. Unlike the existing optical cable framework in a spiral extending mode, the framework grooves in the preferred embodiment extend along the longitudinal direction of the framework 1, that is, the framework grooves on the framework 1 are straight grooves, and the axis of the straight grooves is parallel to the axis of the framework 1.

Since the skeleton groove is arranged in the longitudinal direction, the cable arranged in the skeleton groove has an insufficient redundant length compared to the cable in the spiral skeleton groove. Therefore, in actual installation, a certain redundant length needs to be reserved for the cables in the framework slots, or the cables in the framework slots are controlled to be in an untensioned state, so that a certain redundant length can be reserved for the cables in the framework slots. Accordingly, in order to avoid the composite optical cable from influencing the cable stability in the framework groove due to longitudinal tensile deformation, the longitudinal tensile deformation capability of the outer sheath 4 and the framework 1 in the preferred embodiment needs to be controlled within a certain range.

Further, in a preferred embodiment, the skeleton groove of the skeleton 1 is opened into a plurality of, for example, three skeleton grooves as shown in fig. 2, and among the plurality of skeleton grooves, at least one first skeleton groove and at least one second skeleton groove 102 are respectively provided. In which an optical fiber line or a signal line is laid in at least one first frame slot 101 along a longitudinal direction, as shown in fig. 2. Of course, when the power line 104 is provided in the composite optical cable and the power line 104 is not provided in the second cable portion, the power line 104 may be provided in one first skeleton groove 101, thereby achieving independent arrangement of the optical unit and the electrical unit.

Meanwhile, in the preferred embodiment, the second framework groove 102 arranged on the outer periphery of the framework 1 is a reserved groove for laying an air-blown cable, and in order to ensure the accuracy and efficiency of cable air blowing, the inner peripheral wall surface of the second framework groove 102 is subjected to smooth treatment in the preferred embodiment, and the surface roughness of the inner peripheral wall surface is ensured to be less than 1.0 μm, so that the friction force for laying the air-blown cable is reduced.

In a preferred embodiment, the framework 1 is formed by extrusion molding of a modified PE material, and a lubricating material (such as talcum powder) is correspondingly added into the modified PE material, wherein the adding proportion of the lubricating material is 2-10%. By utilizing the corresponding addition of the lubricating material in the modified PE material, the forming roughness of the framework groove can meet the actual application requirement.

Since the framework grooves in the preferred embodiment are arranged in the longitudinal direction, the cables in the framework grooves cannot be fastened to the framework by means of spiral winding. Therefore, when the framework groove is actually formed, it is preferably formed at the top and both sides of the framework 1, as shown in fig. 1, so that when the cable is laid in the framework 1, a certain support can be provided for the cable by the framework groove, and the cable is prevented from falling off in the cable laying process. In actual production, it is preferable to perform a taping treatment on the outside of the carcass 1 while feeding the yarn into the first carcass tank 101, and to form the water-blocking layer 2 by winding a water-blocking tape or a moisture-proof tape, for example. In addition, the framework groove in the preferred embodiment is a C-shaped groove as shown in fig. 2, and the width of the opening of the C-shaped groove is smaller than the maximum width of the C-shaped groove, so that the accommodating capacity of the framework groove can be ensured, the cable arranged in the framework groove can be bundled to a certain extent, and the cable can be further prevented from falling off in the optical cable preparation process.

In more detail, in the preferred embodiment, the skeleton grooves of the outer periphery of the skeleton 1 are three, two first skeleton grooves 101 and one second skeleton groove 102, which are equally spaced. Moreover, in the preparation process of the composite optical cable, one of the skeleton grooves (preferably, the first skeleton groove 101 provided with the cable) is in an upward opening form, so that the other first skeleton groove 101 for laying the cable can play a certain supporting role on the cable laid therein.

In practical implementation, if the power lines 104 and/or the signal lines are disposed in the first frame slot 101, the number of the power lines and/or the signal lines is preferably 1 to 12, and the diameter of each of the power lines and the signal lines is preferably 0.5mm to 5 mm. Accordingly, the number of the optical fiber lines disposed in the first frame groove 101 is preferably 1 to 12, and the number of the cores of each optical fiber line is preferably 2 to 24.

Meanwhile, for the second framework groove 102 in the preferred embodiment, it can be used for air-blown laying of 1-4 air-blown cables, and the diameter of each cable is further preferably 4-8 mm.

In the preparation process of the composite optical cable, after the cables in the first framework groove 101 are laid, a water-resistant layer 2 is preferably formed on the periphery of the framework 1, and a reinforcing layer and/or an armor layer 3 is/are arranged on the periphery of the water-resistant layer 2, so that each cable in the first framework groove 101 is accurately encapsulated by the water-resistant layer and/or the armor layer, and the water resistance and damage resistance of the composite optical cable in practical application are ensured. In a preferred embodiment, the water-blocking layer 2 is formed by sequentially winding water-blocking tapes on the periphery of the framework 1, the reinforcing layer is formed by sequentially winding and wrapping damp-proof aluminum tapes on the periphery of the water-blocking layer, and the armor layer 3 is formed by sequentially winding FRP (fiber reinforced plastic) tapes or aramid tapes. When the water-resistant layer 2, the reinforcing layer and the armor layer 3 are simultaneously arranged, the reinforcing layer is arranged between the water-resistant layer 2 and the armor layer 3. In addition, the armor layer 3 may also be preferably made of another material according to actual needs, which is not described herein.

Further, after the corresponding arrangement of the framework 1, the outer periphery water-blocking layer 2 and the armor layer 3 is completed, a semi-finished product of the first cable part can be obtained; thereafter, the semi-finished product is fed in synchronization with the cable unit (the power line 104 or the air blowing tube 105) in the second cable portion, and the outer sheath 4 is extrusion-molded on the outer peripheries of both to form a 8-shaped sheath structure, thereby obtaining a composite optical cable having a cross-section of 8-shaped. At this time, the first outer sheath 401, the transition section 403, and the second outer sheath 402 form an integral structure. In addition, in the preferred embodiment, the outer sheath 4 is preferably formed by extrusion molding of PE (polyethylene) material, and the thicknesses of different portions thereof may be preferred according to actual needs, for example, the thickness of the first outer sheath 401, the outer diameter of the second outer sheath 402 and/or the thickness of the transition section 403 are preferred.

Preferably, in order to identify different skeleton grooves in practical use, a marking line 106 is longitudinally arranged on the outer periphery of the skeleton 1 between at least one pair of adjacent skeleton grooves, and is used for distinguishing different skeleton grooves and quickly identifying cables in each skeleton groove. In a preferred embodiment, the marking line 106 is of a color different from the color of the skeleton 1, and extends from the peripheral wall of the skeleton 1 towards the interior of the skeleton 1 for a distance, for example forming a triangular marking as shown in fig. 1.

Example 1:

in this embodiment, the power line 104 is disposed in the second cable portion of the 8-shaped composite optical cable, and the middle portion of the framework 1 is correspondingly disposed with a framework reinforcing member 103, the framework reinforcing member 103 is a single-core or multi-core reinforcing wire, and it extends along the longitudinal direction of the framework 1, and it may be made of metal material, such as steel wire, iron wire, or hard non-metal material, according to the actual requirement.

Through the above arrangement of the power line 104, the separation of the power line and other cables can be fully realized, so that when the optical cable is subjected to optical fiber branching and air blowing, the composite optical cable is not required to be powered off, the working reliability of a corresponding machine room is ensured, the influence on the working of other cables and equipment due to the air blowing operation of the composite optical cable or the optical fiber branching is reduced to the greatest extent, and the application reliability of the composite optical cable is improved. And the corresponding setting of skeleton reinforcement 103 can fully guarantee the tensile strength of first cable portion, avoids because of skeleton 1 tensile deformation leads to the light unit fracture in first skeleton groove 101, damages.

Further, in actual operation, the framework 1 is formed by continuously extruding the PE material on the periphery of the framework reinforcing member 103, and other corresponding structures are correspondingly arranged in the framework 1 and outside the framework 1, so as to finally form the composite optical cable structure shown in fig. 1.

Example 2:

in this embodiment, the structure of the 8-shaped composite optical cable is different from that of the composite optical cable in embodiment 1 mainly in that: the middle part of the framework 1 is coated with an air blowing pipe 105 which can be used as an air blowing reserved pipeline to facilitate the subsequent laying of the air blowing optical cable. At this time, two kinds of reserved air blowing pipes, i.e., the second frame groove 102 and the air blowing pipe 105, are formed on the frame 1, and can be used for laying the air blowing optical cable, respectively.

Accordingly, in the case of the composite optical cable of the present embodiment, the former 1 is preferably formed by continuously extruding the PE material around the continuously fed blowing tube 105 to finally obtain the former 1 as shown in fig. 3. Since the middle portion of the framework 1 is not provided with the reinforcing core, in the preferred embodiment, it is further preferred that sheath reinforcing members 404 are respectively provided at two outer sides of the framework 1, and are correspondingly provided in the first outer sheath 401 to form an integral structure with the first outer sheath 401, so as to enhance the tensile strength of the first cable portion. Obviously, with regard to the arrangement of the sheath reinforcing member 404, it can be synchronously fed along the longitudinal direction of the skeleton 1 to both sides of the covered skeleton 1 when the outer sheath 4 is extrusion-molded, and be synchronously molded with the outer sheath 4, finally forming an integral structure as shown in fig. 3.

It is to be understood that the sheath reinforcing member 404 on the side of the framework 1 in the first cable portion may be provided in one or a plurality of parallel arrangements as shown in fig. 3, as required by the actual arrangement. Moreover, the sheath reinforcement 404 may be made of a metal material or a non-metal material, as long as the actual reinforcement requirements of the outer sheath are met.

Obviously, for the second cable part in

embodiments

1 and 2, it is possible to form the second cable part after continuously extruding the PE material around the continuously fed power line 104, and in this case, the power line 104 does not need to be disposed in the first skeleton groove 101, and the first skeleton groove 101 can accommodate the corresponding signal line and optical fiber unit therein.

Example 3:

in this embodiment and the following embodiments 4 and 5, the structure of the 8-shaped composite optical cable is fundamentally different from the structure of the composite optical cable in the

embodiments

1 and 2 in that: the electric power line 104 of the composite optical cable is arranged in the first cable part, and the air blowing pipe 105 is arranged in the second cable part in the

embodiments

3, 4 and 5 along the longitudinal direction, and the air blowing pipe 105 is used as a cable unit of the second cable part for the subsequent laying of the air blowing optical cable.

Meanwhile, in embodiment 3, the form of arrangement of the skeleton 1 in the first cable part is similar to that in

embodiments

1, 2, and the power line 104 is accommodated in one first skeleton groove 101 at this time, as shown in fig. 6, 7; accordingly, in the other first skeleton grooves 101, the signal lines and the optical fiber units are correspondingly accommodated. In addition, a framework reinforcing member 103 is provided in the middle of the framework 1 in a longitudinally extending manner for enhancing the flexural strength and tensile strength of the framework 1.

Example 4:

in this embodiment, the greatest difference between the composite optical cable and the composite optical cable in embodiment 3 is that: the power line 104 is arranged in the middle of the skeleton 1, extending in the longitudinal direction. In practice, the skeleton 1 is obtained by extruding a PE material around the continuously fed power line 104.

Further, in each first skeleton groove 101, a corresponding signal line and optical fiber unit are housed, and the second skeleton groove 102 is left as a channel for subsequent air-blown cable laying, as shown in fig. 9. Preferably, sheath reinforcing members 404 are disposed correspondingly within the first outer sheath 401, and are disposed in pairs on both horizontal sides of the bobbin 1, as shown in fig. 8.

Example 5:

in this embodiment, the greatest difference between the composite optical cable and the composite optical cable in embodiment 3 is that: in this case, the middle portion of the frame 1 is not provided with the frame reinforcement 103, but is correspondingly provided with the air blowing pipe 105. In the actual production, the skeleton 1 is obtained by extruding a PE material around the periphery of a continuously fed air-blowing pipe 105.

Further, in each first skeleton groove 101, a corresponding power line 104, signal lines, and optical fiber units are housed, and the second skeleton groove 102 is left as a channel for subsequent air-blown cable laying, as shown in fig. 11. Preferably, sheath reinforcing members 404 are disposed correspondingly within the first outer sheath 401, and are disposed in pairs on both horizontal sides of the bobbin 1, as shown in fig. 10. Obviously, in this embodiment, at least three pipes and channels are reserved for the air-blowing of the composite optical cable, that is, two air-blowing pipes 105 respectively arranged in the two cable parts and at least one second skeleton groove 102 arranged on the skeleton 1, so that the subsequent laying of the air-blowing optical cable can be greatly facilitated, and the convenience in laying of the newly-added optical cable is improved.

The 8-shaped framework type air-blowing composite optical cable is simple in structure and convenient and fast to prepare, and can accurately realize suspension laying of the composite optical cable, so that a cable part for suspension can be correspondingly provided with a power line or a laying pipeline of the air-blowing optical cable while bearing and suspending, and the functionality of the 8-shaped composite optical cable is greatly improved; and, through corresponding first skeleton groove and the second skeleton groove of setting up in first cable portion for form at least one pipeline and/or the channel that is used for the air-blowing optical cable air-blowing to lay on the skeleton, guarantee that composite optical cable can carry out laying of corresponding optical cable through the mode of air-blowing laying after setting up, avoided laying new optical cable again beside composite optical cable, simplified the process that newly increases optical cable and lay, the cost is saved, mixed and disorderly circumstances when also effectively having avoided optical cable to lay appears, the city view after the optical cable is laid has been promoted, have better application prospect and spreading value.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An 8-shaped framework type air-blowing composite optical cable is characterized by comprising a first cable part and a second cable part;

2. A slotted former air-blown composite optical cable according to claim 1 wherein the mid-section of the slotted former is provided with a former stiffener or air-blown tube extending longitudinally thereof.

3. An 8-shaped framework type air-blowing composite optical cable is characterized by comprising a first cable part and a second cable part;

4. The 8-shaped framework type air-blowing composite optical cable according to claim 3, wherein a power line and/or a signal line are arranged in the framework; and is

or

5. A slotted former optical cable according to claim 4, wherein the power lines are disposed in the first slotted former and a middle portion of the former is provided with a former stiffener or air blown tube extending longitudinally thereof.

6. The 8-shaped skeletal air-blown composite optical cable according to any one of claims 1 to 5, wherein the surface roughness of the inner peripheral wall surface of the second skeletal groove is less than 1.0 μm.

7. The 8-shaped framework type air-blowing composite optical cable according to any one of claims 1 to 5, wherein the framework grooves are C-shaped grooves which are formed at intervals in an upward direction around the outer periphery of the framework, and the opening width of each C-shaped groove is not greater than the maximum value of the opening width of each C-shaped groove.

8. The 8-shaped framework type air-blowing composite optical cable according to any one of claims 1 to 5, wherein sheath reinforcements are symmetrically arranged in the first outer sheath, and the two sheath reinforcements are respectively arranged on two horizontal sides of the framework.

9. The 8-shaped framework type air-blowing composite optical cable according to any one of claims 1 to 5, wherein a water blocking layer is further arranged between the framework and the first outer sheath, is formed by wrapping a water blocking tape on the periphery of the framework, and is used for packaging an optical fiber unit or a cable in the first framework groove.

10. The 8-shaped framework type air-blowing composite optical cable according to claim 9, wherein a reinforcing layer and/or an armor layer is/are further arranged between the water-resistant layer and the first outer sheath;

the reinforcing layer is obtained by sequentially winding and wrapping a damp-proof aluminum strip on the periphery of the water-resistant layer; the armor layer is formed by sequentially winding and coating FRP belts or the periphery of the waterproof layer or the periphery of the reinforcing layer.