CN114063236B - Compression-resistant framework type optical cable and preparation method thereof - Google Patents

Compression-resistant framework type optical cable and preparation method thereof Download PDF

Info

Publication number
CN114063236B
CN114063236B CN202210032734.2A CN202210032734A CN114063236B CN 114063236 B CN114063236 B CN 114063236B CN 202210032734 A CN202210032734 A CN 202210032734A CN 114063236 B CN114063236 B CN 114063236B
Authority
CN
China
Prior art keywords
cable
framework
resistant
optical cable
peripheral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210032734.2A
Other languages
Chinese (zh)
Other versions
CN114063236A (en
Inventor
胡海峰
阮云芳
刘宏超
杨向荣
祁林
肖毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangtze Optical Fibre and Cable Co Ltd
Original Assignee
Yangtze Optical Fibre and Cable Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yangtze Optical Fibre and Cable Co Ltd filed Critical Yangtze Optical Fibre and Cable Co Ltd
Priority to CN202210032734.2A priority Critical patent/CN114063236B/en
Publication of CN114063236A publication Critical patent/CN114063236A/en
Application granted granted Critical
Publication of CN114063236B publication Critical patent/CN114063236B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4415—Cables for special applications
    • G02B6/4427—Pressure resistant cables, e.g. undersea cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G02B6/4432—Protective covering with fibre reinforcements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4479—Manufacturing methods of optical cables

Abstract

The invention discloses a compression-resistant framework type optical cable and a preparation method thereof. The pressure-resistant skeleton-type optical cable comprises a special-shaped skeleton and an optical unit; the special-shaped framework is provided with a central reinforcing piece extending axially, framework grooves arranged around the central reinforcing piece and peripheral reinforcing pieces arranged at intervals with the framework grooves; the circumferential reinforcement having a gap in an axial direction forming an axial discontinuity; the light units are embedded in the skeleton grooves and are filled horizontally without exceeding the outer diameter of the surrounding reinforcers. The optical loss increase caused by pressure is reduced while the flattening resistance is improved, and the diameter and the weight of the optical cable are not increased additionally because the surrounding reinforcing parts are arranged in the framework and partially replace the volume and the mass of the original framework. Gaps are formed on the peripheral reinforcing parts, so that the peripheral reinforcing parts are axially discontinuous, and the structure similar to the vertebral column structure is skillfully formed, so that the bending performance of each direction is ensured, and the bending performance of the optical cable cannot be reduced when the peripheral reinforcing parts are arranged in the framework.

Description

Compression-resistant framework type optical cable and preparation method thereof
Technical Field
The invention belongs to the field of optical communication, and particularly relates to a pressure-resistant framework type optical cable and a preparation method thereof.
Background
The main composition structure of the existing skeleton optical cable comprises a central reinforcing piece, a skeleton groove, an optical fiber in the groove, a water blocking tape wrapped on a cable core and a sheath layer, and the skeleton optical cable has the advantages of compact structure and large number of optical fiber cores and has excellent mechanical property and temperature property, so that the skeleton optical cable is widely applied to underground laying. Because the number of the cores of the skeleton optical cable is higher, the loss is very large and the maintenance cost is very high when the skeleton optical cable is constructed or laid and damaged by external force or underground pressure. Therefore, it is very important to improve the flattening performance of the skeletal cable.
Generally, the method for improving the flattening performance of the optical cable not only has poor effect of improving the flattening performance, but also can obviously increase the diameter and the weight of the optical cable by increasing the armor layer or improving the thickness of the sheath, and simultaneously, the bending performance of the optical cable is also reduced to be inconvenient for construction.
Disclosure of Invention
The invention provides a compression-resistant framework type optical cable and a preparation method thereof, aiming at solving the technical problems that the conventional framework cable has poor compression-resistant flat capability, the diameter and the weight of the optical cable are remarkably increased, and the construction is inconvenient because a lateral pressure conduction and distribution system is formed by a central reinforcing piece and a peripheral reinforcing piece which is arranged at the periphery of the central reinforcing piece and protrudes out of optical units filled in framework grooves.
To achieve the above object, according to one aspect of the present invention, there is provided a pressure-resistant skeleton-type optical cable including a special-shaped skeleton, and an optical unit;
the special-shaped framework is provided with a central reinforcing piece extending axially, framework grooves arranged around the central reinforcing piece and peripheral reinforcing pieces arranged at intervals with the framework grooves;
the light units are embedded in the skeleton grooves and are filled horizontally without exceeding the outer diameter of the surrounding reinforcers.
Preferably, the pressure-resistant slotted core optical cable has the central strength member and the surrounding strength members close to each other in the radial direction of the optical cable, so that when the optical cable is subjected to pressure, the pressure is distributed to the central strength member and the surrounding strength members to avoid the slotted core; preferably, the number of surrounding strength members in the cross-section of the cable is 2 or more, preferably an odd number.
Preferably, the cross-sectional shape of the surrounding strength member of the crush-resistant skeletal cable is circular; the tensile modulus of the central reinforcing piece is 45-195 GPa, and steel wires, steel strands or FRP can be selected.
Preferably, the cross-sectional shape of the surrounding strength member of the crush-resistant skeletal cable is circular or has an arc line matching the cross-section of the central strength member.
Preferably, the compression-resistant framework-type optical cable has the surrounding reinforcements distributed with a constriction structure in the axial direction, and the projection S of the constriction structure on the cross section of the optical cable0The following relationship is satisfied with a maximum projection S of the surrounding strength members on a cross section of the optical cable:
Figure 848690DEST_PATH_IMAGE001
。
preferably, the compression-resistant skeletal cable has the surrounding strength members axially distributed with constrictions such that the surrounding strength members are axially discontinuous gaps.
Preferably, the surrounding reinforcements of the pressure-resistant framework-type optical cable have periodically spaced constriction structures in the axial extension direction of the framework grooves, the gap distance is 0.2-5 cm, and the period is 1-30 cm.
Preferably, the compression-resistant framework-type optical cable has the constriction structures which keep the same or increase the interval from inside to outside along the radial direction on the optical cable section; the constriction structure is straight, curved or broken along the radial path.
Preferably, the pressure-resistant skeletal cable has the central strength member and the peripheral strength members fixed by a plastic mold, and a skeletal groove is formed between adjacent peripheral strength members.
Preferably, the plastic mold of the pressure-resistant framework-type optical cable is a thermoplastic extrusion material.
Preferably, the framework groove of the pressure-resistant framework-type optical cable is a V/U-shaped groove, a circular groove or a square groove; the framework grooves extend along the straight line or the SZ direction.
Preferably, the pressure-resistant skeleton-type optical cable is provided with a sheath, the special-shaped skeleton and the optical unit are arranged in the sheath, and a water-blocking tape, a protective layer and/or an armor layer are arranged between the special-shaped skeleton and the sheath and between the special-shaped skeleton and the optical unit and the sheath.
According to another aspect of the present invention, there is provided a method for preparing a crush-resistant skeletal cable, comprising the steps of:
the central strength member is combined with the surrounding strength members to form a strip combination, the strip combination is machined along the radial direction of the optical cable to form an axial gap of the surrounding strength members, and the axial gap is combined with other elements to form the optical cable.
Preferably, the machining along the radial direction of the optical cable of the method for preparing the pressure-resistant framework-type optical cable specifically comprises the following steps:
at the gap forming portion, a tool bit having a corresponding shape is ground to form a gap whose distance increases from the inside to the outside in the radial direction.
Preferably, the machining along the radial direction of the optical cable of the method for preparing the pressure-resistant framework-type optical cable specifically comprises the following steps:
the gap with constant spacing is formed along a straight, curved or broken path by linear cutting.
In general, compared with the prior art, the above technical solutions contemplated by the present invention can achieve the following beneficial effects:
according to the pressure-resistant skeleton-type optical cable provided by the invention, the traditional pressure-resistant structure such as an armor layer and the like is not added outside the skeleton optical cable, so that the diameter and weight of the optical cable are prevented from being increased due to the pressure-resistant structure. On the contrary, by using the framework structure, the compression-resistant member, i.e. the peripheral reinforcement, and the central reinforcement commonly provided in the framework-type optical cable are arranged to contact each other through the anti-crushing FRP rod arranged in the framework, so as to jointly form a pressure transmission and distribution system, and when the optical cable is subjected to pressure, the peripheral reinforcement and the central reinforcement serve as strong supports to bear lateral pressure. Meanwhile, the positions of the optical units in the framework groove and the surrounding reinforcing parts are combined, and under the pressure conduction and distribution system, the optical cable in the framework groove is prevented from bearing pressure, so that the flattening resistance is improved, meanwhile, the increase of optical loss caused by pressure is reduced, and the surrounding reinforcing parts are arranged in the framework, so that the volume and the mass of the original framework are partially replaced, and the diameter and the weight of the optical cable cannot be additionally increased. Furthermore, in order to solve the problem that the bending performance of the framework cable is obviously reduced due to the compression-resistant elements, namely the surrounding reinforcing members, gaps are formed on the surrounding reinforcing members, so that the axial direction of the reinforcing members is discontinuous, the structure similar to a vertebral column is ingeniously formed, the bending performance of each direction is ensured, and the bending performance of the optical cable cannot be reduced when the reinforcing members are arranged in the framework.
The invention also provides a preparation method of the compression-resistant framework type optical cable, which can efficiently and stably form axially discontinuous peripheral reinforcements and hardly influence the production efficiency of the framework cable.
Drawings
FIG. 1 is a schematic cross-sectional view of a pressure-resistant skeletal cable provided in example 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to example 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to example 2 of the present invention;
FIG. 4 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to example 2 of the present invention;
FIG. 5 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to example 3 of the present invention;
FIG. 6 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to example 3 of the present invention;
FIG. 7 is a schematic cross-sectional view of a crush-resistant skeletal cable provided in example 4 of the present invention;
fig. 8 is a schematic cross-sectional view of a pressure-resistant skeletal cable according to embodiment 4 of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1 is central reinforcement, 2 is surrounding reinforcement, 3 is the light unit, 4 is the skeleton, 5 is the water-blocking tape, 6 is the restrictive coating, 7 is the protective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following 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.
The invention provides a compression-resistant skeleton-type optical cable which comprises a special-shaped skeleton and an optical unit;
the special-shaped framework is provided with a central reinforcing piece extending axially, framework grooves arranged around the central reinforcing piece and peripheral reinforcing pieces arranged at intervals with the framework grooves; the circumferential reinforcement having a gap in an axial direction forming an axial discontinuity;
the central reinforcing part and the peripheral reinforcing parts are close to each other in the radial direction of the optical cable, so that when the optical cable is stressed, the stress is distributed to the central reinforcing part and the peripheral reinforcing parts to avoid the framework grooves. The central reinforcement and the peripheral reinforcements are fixed by a plastic mold, and a skeleton groove is formed between adjacent peripheral reinforcements. The plastic die is a thermoplastic extrusion material, preferably HDPE, MDPE. With the plastic mold fixation, the relative position between the peripheral reinforcing members and the central reinforcing member can be better determined, thereby resisting pressure in different directions. When the number of the peripheral reinforcing members is even, the uniformly distributed peripheral reinforcing members are kept in relative positions by the plastic molds, and when the external pressure in the direction of the framework grooves is resisted, the pressure is distributed between the peripheral reinforcing members and the peripheral reinforcing members, and as shown in fig. 1, 3, 5 and 7, the lateral pressure to the framework grooves can be reduced, and the optical fibers arranged in the framework grooves can be protected. When the number of the peripheral reinforcing parts is odd, the diameter direction always passes through the peripheral reinforcing parts, so that external pressure can be distributed between the peripheral reinforcing parts and the central reinforcing part, the side pressure on the framework grooves can be better avoided, the optical fibers arranged in the framework grooves are protected, the fixation of the plastic mold is firmer, and the relative displacement of the peripheral reinforcing parts caused by the pressure is introduced. Therefore, the number of the peripheral reinforcing members in the cross section of the optical cable is more than or equal to 2, preferably an odd number.
The cross section of the central reinforcing part is circular, so that the central reinforcing part has better isotropic bending performance; the tensile modulus of the central reinforcing piece is 45-195 GPa, and steel wires, steel strands or FRP can be selected.
The cross section of the peripheral reinforcing part is circular or has an arc line matched with the cross section of the central reinforcing part, such as a sector ring shape and a crescent shape; the surrounding reinforcement is FRP. The periphery reinforcing piece is axially distributed with a constriction structure, and the projection S of the constriction structure on the cross section of the optical cable0The following relationship is satisfied with a maximum projection S of the surrounding strength members on a cross section of the optical cable:
Figure 969093DEST_PATH_IMAGE002
。
due to the existence of the constriction structure, the integral bending of the optical cable is improvedThe performance avoids the sharp reduction of bending performance caused by adding a peripheral reinforcing piece in the framework. When in use
Figure 217672DEST_PATH_IMAGE003
When the circumferential reinforcement is completely broken, the circumferential reinforcement is distributed with constrictions in the axial direction so that the circumferential reinforcement is axially discontinuous.
The preferred scheme of the constriction structure is that the surrounding reinforcing pieces have periodic gaps in the axial extension direction of the framework groove, the gap distance is 0.2-5 cm, and the period is 1-30 cm, so that the bending performance and the compression resistance performance of the optical cable are considered at the same time. The gap distance refers to the distance at which the gap is narrowest. The gap of the surrounding reinforcing member is kept constant or increased along the radial direction from inside to outside on the section of the optical cable; the intermittent scheme that the interval is kept unchanged along the radial direction from inside to outside on the optical cable section by adopting the gap is simple and convenient to process, and the variable-diameter scheme that the interval is increased along the radial direction from inside to outside on the optical cable section by adopting the gap has more excellent bending performance and hardly causes the reduction of the bending performance of the optical cable. The path of the gap along the radial direction may be a straight line which is easy to machine, or may be a curved line or a broken line, such as an S-shaped curve or a Z-shaped broken line, as illustrated in fig. 2 or 6; when a gap having a curved or broken path is used, the surrounding reinforcement forms a fit with each other such as a fit of the vertebra, is more stable, and has a larger coverage in the axial direction, reducing leakage of lateral pressure to the portion of the inner fiber due to the gap.
The light units are embedded into the framework grooves and are not filled beyond the outer diameter level of the surrounding reinforcements, the distance from a certain position to the center of the optical cable is called as the outer diameter level, namely the distance between the light units filled in the framework grooves and the center of the optical cable is not more than the distance between the outermost point of the surrounding reinforcements and the center of the optical cable. The framework groove is a V/U-shaped groove, a circular groove or a square groove; the framework grooves extend along the straight line or the SZ direction.
The special-shaped framework and the optical units are arranged in the sheath, and a water blocking material, a protective layer and/or an armor layer are arranged between the special-shaped framework and the sheath and between the special-shaped framework and the optical units and the sheath; the water-blocking material is water-blocking powder, water-blocking aramid fiber and a wrapped or longitudinally wrapped water-blocking tape.
The invention provides a preparation method of a compression-resistant framework type optical cable, which comprises the following steps:
forming a strip combination of the central reinforcement and the peripheral reinforcements, specifically: the central reinforcement and the peripheral reinforcement forming strips are stranded along a straight line or SZ, and then a thermoplastic extrusion material is extruded at the outside thereof through a frame groove die to form a plastic die, and the central reinforcement and the peripheral reinforcement forming strips are fixed and form frame grooves.
Machining along the radial direction of the framework groove to form an axial gap of the peripheral reinforcing part; the method specifically comprises the following steps: forming a gap having a curved or broken line path along a straight, curved or broken line path by using a linear cutting process at a gap forming site; or a cutter head with a corresponding shape is adopted for grinding, so that gaps with increasing intervals from inside to outside along the radial direction are formed.
And then combined with other elements to form the optical cable.
The following are examples:
example 1
The cross-sectional structure of the pressure-resistant skeleton-type optical cable provided by the embodiment is shown in fig. 1, and comprises a special-shaped skeleton, an optical unit 3, a water-resistant layer 5 and a sheath layer 6. The special-shaped framework is provided with a central reinforcing part 1 extending axially, 5 framework grooves arranged around the central reinforcing part and 5 peripheral reinforcing parts 2 arranged at intervals with the framework grooves; the circumferential reinforcement has a gap in the axial direction forming an axial discontinuity. The central reinforcing part 1 and the peripheral reinforcing parts 2 are close to each other in the radial direction of the optical cable, so that when the optical cable is stressed, the stress is distributed to the central reinforcing part and the peripheral reinforcing parts to avoid the framework grooves. The central reinforcement 1 and the peripheral reinforcements 2 are fixed by extruded plastic 3, and a skeleton groove is formed between adjacent peripheral reinforcements 2. The extruded plastic is made of HDPE as a thermoplastic extrusion material. The cross section of the central reinforcing part 1 is circular, so that the central reinforcing part has better isotropic bending performance; the central reinforcement is FRP and has a tensile modulus of about 50 GPa.
The peripheral reinforcing piece 1 is made of FRP, the cross section of the peripheral reinforcing piece 1 is circular, and the peripheral reinforcing piece 2 is provided with a periodic gap in the axial extending direction of the framework groove, wherein the gap distance is 0.2cm, and the period is 1 cm. The gaps of the surrounding reinforcing members are kept constant along the cross section of the optical cable from inside to outside in the radial direction, and the path of the gaps along the radial direction is a Z-shaped broken line, as shown in the schematic structural diagram of the cross section of the optical cable in FIG. 2.
The light unit 3 is a 12-core belt embedded in the framework groove and is not filled in the periphery of the outer diameter of the reinforcement horizontally (as shown by a dotted circle in fig. 1), the framework groove is a U-shaped groove, and the framework groove is linearly arranged in a line.
The special-shaped framework and the optical unit 3 are arranged in the sheath, and a water blocking material 5 is arranged between the special-shaped framework and the optical unit 3 and the sheath 6; the water-blocking material is a wrapped water-blocking tape.
The invention provides a preparation method of a compression-resistant framework type optical cable, which comprises the following steps:
forming a strip combination of the central reinforcement 1 and the peripheral reinforcements 2, specifically: the central reinforcement member and the peripheral reinforcement member forming strip are paid out in a straight line, and then a thermoplastic extrusion material 3HDPE is extruded through a frame groove die on the outside thereof, the central reinforcement member 1 and the peripheral reinforcement member 2 are fixed, and a frame groove is formed.
Machining along the advancing direction of the framework grooves to form axial gaps of the peripheral reinforcing pieces 2; the method specifically comprises the following steps: at the gap forming portion, a gap having a broken line path is formed along the broken line path by using a wire cutting process.
And then combined with other elements to form an optical cable:
and embedding the 12-core belt into the framework groove, then wrapping the water-blocking belt, extruding sheath materials on the outer side of the water-blocking belt, and cooling to form a sheath layer.
Example 2
The cross-sectional structure of the pressure-resistant skeleton-type optical cable provided by the embodiment is shown in fig. 3, and comprises a special-shaped skeleton, an optical unit 3, a water-blocking layer 5 and a sheath layer 6. The special-shaped framework is provided with a central reinforcing part 1 extending axially, 5 framework grooves arranged around the central reinforcing part and 5 peripheral reinforcing parts 2 arranged at intervals with the framework grooves; the circumferential reinforcement has a gap in the axial direction forming an axial discontinuity. The central reinforcing part 1 and the peripheral reinforcing parts 2 are close to each other in the radial direction of the optical cable, so that when the optical cable is stressed, the stress is distributed to the central reinforcing part and the peripheral reinforcing parts to avoid the framework grooves. The central reinforcement is fixed to the peripheral reinforcements by means of extruded plastic 3, and a skeleton groove is formed between adjacent peripheral reinforcements. The extruded plastic is made of HDPE as a thermoplastic extrusion material. The cross section of the central reinforcing part is circular, so that the central reinforcing part has better isotropic bending performance; the central reinforcing member is a steel wire having a tensile modulus of about 190 GPa.
The peripheral reinforcing piece is made of FRP, the cross section of the peripheral reinforcing piece is crescent, the received pressure can be better dispersed through the central reinforcing piece, the peripheral reinforcing piece is provided with periodic gaps in the axial extending direction of the framework groove, the gap distance is 2cm, and the period is 10 cm. The gaps of the surrounding strength members remain at a constant distance radially from the inside to the outside in the cross-section of the cable, and the gaps are diagonal in the path along the radial direction, as shown in fig. 4.
The light units are 12 core belts, are embedded into the framework grooves and are not filled in the peripheral reinforcing piece in a horizontal mode (shown as a dotted circle in fig. 3), the framework grooves are U-shaped grooves, and the framework grooves are arranged in a linear line.
The special-shaped framework and the optical unit 3 are arranged in the sheath, and a water blocking material 5 is arranged between the special-shaped framework and the optical unit 3 and the sheath 6; the water-blocking material is a wrapped water-blocking tape.
The invention provides a preparation method of a compression-resistant framework type optical cable, which comprises the following steps:
forming a strip combination of the central reinforcement 1 and the peripheral reinforcements 2, specifically: the central reinforcing member and the peripheral reinforcing member forming bar are paid out in a straight line, and then a thermoplastic extrusion material 3 is extruded through a frame groove die on the outside thereof, the central reinforcing member and the peripheral reinforcing member are fixed, and a frame groove is formed.
Machining along the advancing direction of the framework grooves to form axial gaps of the peripheral reinforcing pieces 2; the method specifically comprises the following steps: at the gap forming portion, a gap having a diagonal line path is formed along the broken line path by using a wire cutting process.
And then combined with other elements to form an optical cable:
and embedding the 12-core belt into the framework groove, then wrapping the water-blocking belt, extruding sheath materials on the outer side of the water-blocking belt, and cooling to form a sheath layer.
Example 3
The cross-sectional structure of the pressure-resistant skeleton-type optical cable provided by the embodiment is shown in fig. 5, and comprises a special-shaped skeleton, an optical unit 3, a water-blocking layer 5 and a sheath layer 6. The special-shaped framework is provided with a central reinforcing part 1 extending axially, 5 framework grooves arranged around the central reinforcing part and 5 peripheral reinforcing parts 2 arranged at intervals with the framework grooves; the circumferential reinforcement has a gap in the axial direction forming an axial discontinuity. The central reinforcing part 1 and the peripheral reinforcing parts 2 are close to each other in the radial direction of the optical cable, so that when the optical cable is stressed, the stress is distributed to the central reinforcing part and the peripheral reinforcing parts to avoid the framework grooves. The central reinforcement is fixed to the peripheral reinforcements by means of extruded plastic 3, and a skeleton groove is formed between adjacent peripheral reinforcements. The extruded plastic is made of HDPE as a thermoplastic extrusion material. The cross section of the central reinforcing part is circular, so that the central reinforcing part has better isotropic bending performance; the central reinforcing member is a steel wire having a tensile modulus of about 190 GPa.
The surrounding reinforcing piece is made of FRP, the cross section of the surrounding reinforcing piece is in a fan shape, the received pressure can be better dispersed through the central reinforcing piece, meanwhile, the area of the part close to the sheath is larger, the surrounding reinforcing piece can better bear the external pressure without degeneration, and the optical fibers in the framework grooves can be better protected from being influenced by the external pressure. The peripheral reinforcing piece is provided with a periodic gap in the axial extending direction of the framework groove, the gap distance is 5cm, and the period is 30 cm. The gaps of the surrounding strength members remain at a constant distance radially from the inside to the outside in the cross-section of the cable, the path of the gaps along the radial direction being s-curve, as shown in fig. 6.
The light units are 12 core belts, are embedded into the framework grooves and are not filled in the peripheral reinforcing piece in a horizontal mode (shown as a dotted circle in fig. 5), the framework grooves are U-shaped grooves, and the framework grooves are arranged in a linear line.
The special-shaped framework and the optical unit 3 are arranged in the sheath, and a water blocking material 5 is arranged between the special-shaped framework and the optical unit 3 and the sheath 6; the water-blocking material is a wrapped water-blocking tape.
The invention provides a preparation method of a compression-resistant framework type optical cable, which comprises the following steps:
forming a strip combination of the central reinforcement 1 and the peripheral reinforcements 2, specifically: the central reinforcing member and the peripheral reinforcing member forming bar are paid out in a straight line, and then a thermoplastic extrusion material 3 is extruded through a frame groove die on the outside thereof, the central reinforcing member and the peripheral reinforcing member are fixed, and a frame groove is formed.
Machining along the advancing direction of the framework grooves to form axial gaps of the peripheral reinforcing pieces 2; the method specifically comprises the following steps: at the gap forming portion, a gap having a curved path is formed along the broken line path by using a wire cutting process.
And then combined with other elements to form an optical cable:
and embedding the 12-core belt into the framework groove, then wrapping the water-blocking belt, extruding sheath materials on the outer side of the water-blocking belt, and cooling to form a sheath layer.
Example 4
The cross-sectional structure of the pressure-resistant skeleton-type optical cable provided by the embodiment is shown in fig. 7, and comprises a special-shaped skeleton, an optical unit 3, a water-blocking layer 5 and a sheath layer 6. The special-shaped framework is provided with a central reinforcing part 1 extending axially, 4 framework grooves arranged around the central reinforcing part and 4 peripheral reinforcing parts 2 arranged at intervals with the framework grooves; the circumferential reinforcement has a gap in the axial direction forming an axial discontinuity. The central reinforcing part 1 and the peripheral reinforcing parts 2 are close to each other in the radial direction of the optical cable, so that when the optical cable is stressed, the stress is distributed to the central reinforcing part and the peripheral reinforcing parts to avoid the framework grooves. The central reinforcement is fixed to the peripheral reinforcements by means of extruded plastic 3, and a skeleton groove is formed between adjacent peripheral reinforcements. The extruded plastic is made of HDPE as a thermoplastic extrusion material. The cross section of the central reinforcing part is circular, so that the central reinforcing part has better isotropic bending performance; the central reinforcing member is a steel wire having a tensile modulus of about 190 GPa.
The surrounding reinforcing member is FRP, the cross section of the surrounding reinforcing member is circular, and the surrounding reinforcing member has better bending performance. The peripheral reinforcing piece is provided with a periodic gap in the axial extending direction of the framework groove, and the gap distance is 0.5 cm and the period is 20 cm. The gaps of the surrounding strength members linearly increase by 0.2cm in the radial direction from the inside to the outside in the cross section of the cable, and the gaps are trapezoidal in the cross sectional view, as shown in fig. 8.
The light units are 12 core belts, are embedded into the framework grooves and are not filled in the peripheral reinforcing piece in a horizontal mode (shown as a dotted circle in fig. 5), the framework grooves are V-shaped grooves, and the framework grooves extend along the SZ direction.
The special-shaped framework and the optical unit 3 are arranged in the sheath, and a water blocking material 5 and a protective layer 7 are arranged between the special-shaped framework and the optical unit 3 and the sheath 6; the water-blocking material is water-blocking yarn wound on the framework; the protective layer is a steel belt.
The invention provides a preparation method of a compression-resistant framework type optical cable, which comprises the following steps:
forming a strip combination of the central reinforcement 1 and the peripheral reinforcements 2, specifically: the central reinforcement and the peripheral reinforcement forming strips are paid out in the SZ direction, and then a thermoplastic extrusion material 3 is extruded through a frame groove die on the outside thereof, the central reinforcement and the peripheral reinforcement are fixed, and a frame groove is formed.
Machining along the advancing direction of the framework grooves to form axial gaps of the peripheral reinforcing pieces 2; the method specifically comprises the following steps: at the gap forming portion, a gap having a curved path is formed along the broken line path by using a wire cutting process.
And then combined with other elements to form an optical cable:
embedding a 12-core belt matrix into a skeleton groove, winding a plurality of water-blocking yarns on the surface of the skeleton, then coating the skeleton optical cable core by a steel belt through a forming die to form a protective layer 7, extruding sheath materials outside the protective layer, and cooling to form a sheath layer 6.
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 (14)

1. The pressure-resistant skeleton-type optical cable is characterized by comprising a special-shaped skeleton and an optical unit;
the special-shaped framework is provided with a central reinforcing piece extending axially, framework grooves arranged around the central reinforcing piece and peripheral reinforcing pieces arranged at intervals with the framework grooves;
the light units are embedded into the skeleton grooves and are filled horizontally without exceeding the outer diameter of the surrounding reinforcers;
the periphery reinforcing piece is axially distributed with a constriction structure, and the projection S of the constriction structure on the cross section of the optical cable0The following relationship is satisfied with a maximum projection S of the surrounding strength members on a cross section of the optical cable:
Figure 627342DEST_PATH_IMAGE001
。
2. the crush-resistant slotted core cable of claim 1, wherein the central strength member and the peripheral strength member are adjacent in a radial direction of the cable such that when the cable is subjected to a compressive force, the compressive force is distributed to the central strength member and the peripheral strength member so as to avoid the slotted core.
3. The crush-resistant skeletal cable of claim 2, wherein the peripheral strength member is circular in cross-sectional shape; the tensile modulus of the central reinforcing piece is 45-195 GPa.
4. The crush-resistant skeletal cable of claim 2, wherein the peripheral strength member cross-sectional shape is circular or has a curve that matches the cross-section of the central strength member.
5. The crush-resistant skeletal cable of claim 1, wherein the circumferential strength member has axially distributed constrictions such that the circumferential strength member has axially discontinuous gaps.
6. The crush-resistant skeletal cable of claim 5, wherein the circumferential reinforcement has periodically spaced constrictions in the axial direction of the skeletal slots, the gap distance being 0.2 to 5cm and the period being 1 to 30 cm.
7. The crush-resistant skeletal cable of claim 5, wherein the constrictions are radially spaced from inside to outside in a cable cross-section at constant or increasing intervals; the constriction structure is straight, curved or broken along the radial path.
8. The crush-resistant skeletal cable of claim 1, wherein the central strength member and the peripheral strength members are secured by a plastic mold and form a skeletal groove between adjacent peripheral strength members.
9. The crush-resistant skeletal cable of claim 8, wherein the plastic mold is a thermoplastic extrusion.
10. The crush-resistant skeletal cable of claim 8, wherein the skeletal grooves are V/U-shaped grooves, circular grooves, or square grooves; the framework grooves extend along the straight line or the SZ direction.
11. The pressure-resistant skeletal cable of claim 1, which comprises a jacket, wherein the shaped frame and the optical units are disposed within the jacket, and a water-blocking tape, a protective layer and/or an armor layer is disposed between the shaped frame and the optical units and the jacket.
12. The method for preparing a crush-resistant skeletal cable according to any one of claims 1 to 11, comprising the steps of:
the central strength member is combined with the surrounding strength members to form a strip combination, the strip combination is machined along the radial direction of the optical cable to form an axial gap of the surrounding strength members, and the axial gap is combined with other elements to form the optical cable.
13. The method for manufacturing a crush-resistant skeletal cable according to claim 12, wherein the machining in the radial direction of the cable is specifically:
at the gap forming portion, a tool bit having a corresponding shape is ground to form a gap whose distance increases from the inside to the outside in the radial direction.
14. The method for manufacturing a crush-resistant skeletal cable according to claim 13, wherein the machining in the radial direction of the cable is specifically:
the gap with constant spacing is formed along a straight, curved or broken path by linear cutting.
CN202210032734.2A 2022-01-12 2022-01-12 Compression-resistant framework type optical cable and preparation method thereof Active CN114063236B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210032734.2A CN114063236B (en) 2022-01-12 2022-01-12 Compression-resistant framework type optical cable and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210032734.2A CN114063236B (en) 2022-01-12 2022-01-12 Compression-resistant framework type optical cable and preparation method thereof

Publications (2)

Publication Number Publication Date
CN114063236A CN114063236A (en) 2022-02-18
CN114063236B true CN114063236B (en) 2022-04-22

Family

ID=80230831

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210032734.2A Active CN114063236B (en) 2022-01-12 2022-01-12 Compression-resistant framework type optical cable and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114063236B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114675388B (en) * 2022-05-27 2022-12-27 江苏亨通光电股份有限公司 Skeleton type ribbon optical cable and preparation method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509097A (en) * 1994-04-07 1996-04-16 Pirelli Cable Corporation Optical fiber core and cable with reinforced buffer tube loosely enclosing optical fibers
CN2684214Y (en) * 2004-04-05 2005-03-09 江苏亨通光电股份有限公司 Skeleton type ultrasoft big core number optical cable
FR2960188B1 (en) * 2010-05-20 2012-05-18 Hutchinson THERMOPLASTIC FRAME FOR MOTOR VEHICLE SEALING OR TRIM PROFILE, INCORPORATING PROFILE AND METHOD OF MAKING FRAME
US9453982B2 (en) * 2014-06-12 2016-09-27 Commscope Technologies Llc Pulling grip assembly
CN208506323U (en) * 2018-06-19 2019-02-15 苏州胜信光电科技有限公司 A kind of high tenacity optical cable
CN110308531A (en) * 2019-08-01 2019-10-08 常熟虞通光电科技有限公司 A kind of layer-stranding cable or cable with special-shaped gasket for packing
CN110888215A (en) * 2019-12-23 2020-03-17 常熟共益信息科技有限公司 Framework type optical cable or cable for 5G network
CN111653390B (en) * 2020-06-22 2021-11-12 杭州富通通信技术股份有限公司 Photoelectric hybrid cable
CN111897069A (en) * 2020-08-22 2020-11-06 常熟高通智能装备有限公司 Special-shaped compression-resistant optical cable

Also Published As

Publication number Publication date
CN114063236A (en) 2022-02-18

Similar Documents

Publication Publication Date Title
US4770489A (en) Ruggedized optical communication cable
EP3470900B1 (en) Optical fiber cable
US5542020A (en) Fiber optic cable having extended contraction window and associated method and apparatus for fabricating the cable
US6922512B2 (en) Non-round filler rods and tubes with superabsorbent water swellable material for large cables
CN114063236B (en) Compression-resistant framework type optical cable and preparation method thereof
JPH0339914A (en) Optical fiber cable
JP2016532137A (en) Stretchable fiber optic cable
US20230213716A1 (en) Ribbed and grooved sheath for optical fiber cable
US8630521B2 (en) Optical cable
EP4184229A1 (en) Optical fiber cable
CN115840274B (en) Optical ribbon cable
CN114185140B (en) Small-bending-radius framework groove type optical cable and preparation method thereof
US10036863B2 (en) Optical fiber cables with flat ribbon fibers
WO2010101092A1 (en) Optical fiber cable having single tube
JP2007272098A (en) Optical fiber cable
CN210222308U (en) Spiral armored cable
KR20220140381A (en) Optical cable
GB2179072A (en) Optical fibre cables
CN220626732U (en) Composite optical cable
JP2020038326A (en) Optical fiber cable
CN116184592B (en) Submarine optical cable and preparation method thereof
CN112037974B (en) Composite material reinforced insulated wire and manufacturing method thereof
CN115903158B (en) Butterfly-shaped band-shaped optical cable
JP2503790Y2 (en) Flexible non-metallic optical fiber cable
US20140010503A1 (en) Fiber optic cable

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant