CN112904516A - High-performance anti-eavesdropping flame-retardant optical cable and manufacturing method thereof - Google Patents
High-performance anti-eavesdropping flame-retardant optical cable and manufacturing method thereof Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 86
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- 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
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
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- 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
- G02B6/4436—Heat resistant
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- 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
- G02B6/4486—Protective covering
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Abstract
The invention discloses a high-performance anti-eavesdropping flame-retardant optical cable and a manufacturing method thereof, and relates to the technical field of optical cable manufacturing, the anti-eavesdropping flame-retardant optical cable comprises a cable core wrapped with a plurality of optical fibers, the surface of the wrapping layer of each optical fiber is coated with a metal layer to form an optical fiber with a metal coating, and the outer side of the cable core is sequentially wrapped with a stainless steel sleeve, a high flame-retardant sheath layer, a metal reinforcement, an inner sheath, an armor layer and an outer sheath from inside to outside; through implementing this technical scheme, can effectively solve traditional terrestrial optical cable and cause the optical cable to be eavesdropped easily because of the protection is not enough technical problem, overcome the current protective measure that eavesdrop-proof optical cable carried out eavesdropping-proof through single means, and the structural design of eavesdrop-proof flame retarded cable is simple, and the security coefficient is high.
Description
Technical Field
The invention relates to the technical field of optical cable manufacturing, in particular to a high-performance anti-eavesdropping flame-retardant optical cable and a manufacturing method thereof.
Background
Optical fiber cables (optical fiber cables) are manufactured to meet optical, mechanical, or environmental performance specifications and utilize one or more optical fibers disposed in a surrounding jacket as a transmission medium and are telecommunication cable assemblies that may be used individually or in groups; the optical cable mainly comprises optical fibers, a plastic protective sleeve and a plastic outer skin; optical cables are more difficult to eavesdrop than ordinary cables, and the fundamental reason for this is that the carrier light waves for optical fiber communication are transmitted inside a closed medium, such as an optical fiber, and are difficult to diffuse out of the optical fiber.
The prior art has four forms of wiretapping an optical cable: the first one is to use a very fine needle tube, the needle tube is a hollow structure, an optical fiber lead wire passes through the needle tube, the needle tube strips the armor layer of the optical cable and then pierces the inner sheath of the optical cable with a long needle to reach the optical fiber, so that the optical fiber in the needle tube is communicated with the intercepted optical fiber, the light beam can be partially led into an eavesdropping instrument, but the light intensity attenuation of the laser in the optical cable does not influence the normal work of the optical cable; the second is to adopt the optical-to-optical comparison method to pick up the optical signal, namely let the light of different wave bands with laser penetrate the optic fibre along the diameter direction of the optic fibre, thus get the optical signal of the corresponding pulse signal, and then translate into the electrical signal, achieve the purpose of eavesdropping; thirdly, stripping the optical cable to a bare fiber, slightly bending the bare fiber, and extracting a leakage signal at the bent part; the fourth method is to use the relay station to perform eavesdropping, namely, eavesdropping is realized by adding an eavesdropping device to the opened optical cable repeater, but the relay station eavesdropping does not relate to the optical cable, so the relay station eavesdropping is not considered in the range of the invention.
In view of the fact that the existing optical cable is easy to eavesdrop, the Chinese patent with the publication number of CN206479687U discloses an anti-eavesdrop optical cable which is characterized in that a metal outer monitoring layer and a metal inner monitoring layer are adopted, and a thin insulating thin layer is adopted between the metal inner monitoring layer and the metal outer monitoring layer to enable the metal inner monitoring layer and the metal outer monitoring layer to be mutually insulated, if burrs pierce the insulating thin layer, the metal inner monitoring layer and the metal outer monitoring layer are communicated, and then an alarm device is triggered, so that an alarm can be given in time when the eavesdrop phenomenon occurs; chinese patent publication No. CN105068203B also discloses an anti-eavesdropping optical fiber cable, an anti-eavesdropping method, and an optical cable manufacturing method, which fuse a monitoring device with the optical fiber cable to reduce the outer diameter of the optical fiber cable to the limit as much as possible, and effectively prevent the optical fiber from being contacted by damaging the sheath surface layer, thereby achieving the purpose of anti-eavesdropping; however, the anti-eavesdropping optical cable cannot be technically completely prevented from being eavesdropped, and the optical cable production process has the technical problems of complex structure and high cost, so that a technical worker in the field needs to further innovate and improve the optical cable to improve the anti-eavesdropping performance of the optical cable, solve the technical problem that the anti-eavesdropping optical cable is complex in structure and high in cost, and have very important research value.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a high-performance anti-eavesdropping flame-retardant optical cable, which aims to solve the technical problem that the optical cable is easy to eavesdrop due to insufficient protection of the traditional terrestrial optical cable, can effectively overcome the problem that the existing anti-eavesdropping optical cable is subjected to anti-eavesdropping protection measures by a single means, and has the advantages of simple structural design, high safety coefficient, good application prospect and high use value.
The technical scheme adopted by the invention is as follows:
the utility model provides a flame retardant cable is eavesdropped to high performance anti-eavesdrop, the optical cable has the cable core of many optic fibre including the parcel, every the cladding surface of optic fibre all coats and is equipped with the metal level in order constituting the metal coating optic fibre, the outside from interior to exterior of cable core wraps up stainless steel sleeve pipe, high fire-retardant restrictive coating, metal reinforcement, inner sheath, armor and oversheath in proper order.
According to the technical scheme, the metal layer is coated on the cladding of the optical fiber to form the metal coating optical fiber, so that on one hand, the metal coating cannot be stripped to the bare fiber by using a conventional optical fiber coating fiber stripper, and the purpose of preventing eavesdropping by stripping the metal coating optical fiber to the bare fiber can be effectively prevented; on the other hand, due to the protection of the metal coating, if the metal layer is punctured by the long needle of the eavesdropping instrument to reach the fiber cladding, the light signal can not leak out through the long needle of the eavesdropping instrument due to the refraction of the metal coating, so that the purpose of preventing eavesdropping is further achieved; the optical fiber with the metal coating also has higher high temperature resistance, and the mechanical property and the moisture resistance of the optical fiber can be improved; on the other hand, the high-flame-retardant sheath layer, the metal reinforcing piece, the armor layer, the inner sheath and the outer sheath which are wrapped outside the cable core form a high-strength protection structure by adopting a reasonable arrangement sequence, the problem that the optical cable armor layer is stripped and then the long needle is used for penetrating into the optical cable inner sheath to contact with the optical fiber can be effectively solved, the problem that the existing anti-eavesdropping optical cable is subjected to anti-eavesdropping protection measures through a single means is solved, the high-performance anti-eavesdropping flame-retardant optical cable can defend the corresponding eavesdropping technical method in the current stage, and can also meet the external influence of resisting mice trouble, fire and the like, and the high-flame-retardant optical cable is simple in structural design and high.
In the above technical solution, preferably, the metal layer coated on the surface of the cladding of the optical fiber is one of gold, copper, aluminum or a mixture thereof; the metal layer material is convenient to obtain in this technical scheme, and the cladding surface of optic fibre scribbles and establishes the metal level simple manufacture, but can effectually prevent to reach the purpose of eavesdropping through peeling off optic fibre metallic coating, and this structural design is simple but ingenious reasonable.
Above-mentioned technical scheme is preferred, the thickness range of metal level is 15-250um, and the metal coating optic fibre that contains this thickness range can effectively prevent to reveal optical signal through eavesdropping the instrument long needle and go out according to the cable is applied to terrestrial environment and makes the adaptability selection.
Preferably, in the technical scheme, the outer sheath is made of a flame-retardant nylon material, and the thickness range of the flame-retardant nylon material is 0.8-1 mm; according to the technical scheme, the outer sheath is made of the flame-retardant nylon material, so that the outer sheath has a good high-temperature resistance characteristic, the fire-proof grade of the outer sheath can reach the V0 grade, and the nylon material is high in hardness (the Shore hardness is about 70), so that the optical cable is difficult to be damaged by squirrels, termites and other organisms.
Preferably, in the technical scheme, the armor layer is a thickened stainless steel band, and the thickness range of the stainless steel band is 0.28-0.3 mm; the structural design can effectively resist the impact and the damage of external force.
Preferably, in the technical scheme, the inner sheath is made of a high-flame-retardant sheath material, and the thickness range of the high-flame-retardant sheath material is 0.8-1 mm; the design of this structure both can effectively promote the flame retardant property of optical cable in order to protect the inlayer structure, also can regard as the built-in monitoring devices 'of optical cable restrictive coating, and the armor in the interior sheath outside and oversheath also can regard as monitoring devices's protective structure, can fuse monitoring devices and optical cable and accomplish safety and stable in structure.
Preferably, in the above technical solution, a plurality of monitoring devices are arranged in the inner sheath, and the monitoring devices are arranged in the annular part of the inner sheath at equal intervals along the circumferential direction of the inner sheath; the monitoring device is bonded with the inner sheath; monitoring device can select the monitoring wire among the prior art among this technical scheme, and certainly specifically not be limited to this, also can choose for use other monitoring device among the prior art in order to reach the function that whether the sheath structure receives outside mechanical stress damage in monitoring optical cable to prevent that the possibility by malicious eavesdropping from appearing in the optical information in the optical cable.
Preferably, in the technical scheme, the metal reinforcement is a galvanized steel wire, the galvanized steel wire is circumferentially wound around the surface of the high-flame-retardant sheath layer, and the diameter of the galvanized steel wire is more than or equal to 1 mm; according to the technical scheme, the metal reinforcing piece can be used as a further protection structure of the optical cable core, so that even if the inner sheath structure and the monitoring device are damaged, the difficulty of artificial damage of the optical cable can be improved through the design of the protection structure, and the mechanical property of the optical cable can be effectively enhanced; meanwhile, the high-flame-retardant sheath layer and the built-in stainless steel sleeve can improve the lateral pressure resistance of the optical cable and protect the stability of the internal optical fiber.
On the other hand, the invention also provides a manufacturing method of the high-performance anti-eavesdropping flame-retardant optical cable, which comprises the following steps:
firstly, optical fiber is put into a warehouse;
secondly, coating a metal layer on the optical fiber and coloring;
thirdly, manufacturing a stainless steel pipe sleeve containing the metal coating optical fiber, and wrapping the stainless steel pipe sleeve by a high-flame-retardant sheath layer made of a high-flame-retardant sheath material;
fourthly, manufacturing a cable core, and winding the metal reinforcing piece on the surface of the high flame-retardant protective layer by using a winding machine;
fifthly, manufacturing an inner sheath, and wrapping the outer side of the metal reinforcement by using the inner sheath;
sixthly, manufacturing an outer sheath, wrapping the inner sheath with an armor layer, and wrapping the outer sheath outside the armor layer;
seventhly, detecting the optical cable, namely detecting whether the optical cable meets the attenuation index and various performances;
and eighthly, taking the finished optical cable out of the warehouse, and taking the optical cable out of the warehouse after the optical cable is detected to be qualified.
The manufacturing method further preferably includes, in the manufacturing of the inner sheath in the fifth step, manufacturing monitoring devices, and using the monitoring devices to arrange the monitoring devices in the annular portion of the inner sheath at equal intervals along the circumferential direction of the inner sheath.
The invention has at least the following beneficial effects:
1. the high-performance anti-eavesdropping flame-retardant optical cable adopts the plurality of metal-coating-layer-containing optical fibers to manufacture the cable core, namely, the cladding surface of the bare fiber in the cable core is coated with metal layers such as Au, Cu, Al and the like, and the structural design ensures that the conventional optical fiber coating stripper can not strip the metal coating to the bare fiber, and can effectively prevent the metal-coating-layer-containing optical fiber from being stripped to the bare fiber so as to achieve the purpose of eavesdropping prevention; meanwhile, the optical fiber in the cable core has refraction performance due to the protection of the metal coating, and an optical signal can not be leaked out through the long needle of the eavesdropping instrument, so that the purpose of preventing eavesdropping is achieved, the eavesdropping prevention performance of the optical cable can be comprehensively improved, and the technical problem that the optical cable is easily eavesdropped due to insufficient protection of the traditional terrestrial optical cable can be effectively solved.
2. According to the high-performance anti-eavesdropping flame-retardant optical cable, the high-flame-retardant sheath layer, the metal reinforcing piece, the armor layer, the inner sheath and the outer sheath are wrapped outside the cable core, and the reasonable arrangement sequence is adopted, so that an optical fiber structure with good overall mechanical performance is formed, the optical fiber structure can be further effectively prevented from being contacted with the optical fiber by penetrating the optical cable inner sheath with the long needle after the optical cable core outer protection structure is stripped, the difficulty of damaging the optical cable protection structure can be improved, and the stability of the inner cable core structure can be protected while the impact and the damage of external force can be resisted.
3. The high-performance anti-eavesdropping flame-retardant optical cable is provided with the plurality of monitoring devices in the inner sheath, when the outer sheath and the armor layer of the optical cable and the inner sheath are damaged, the monitoring devices can be triggered, and the high-voltage electronic pulses are transmitted and received by the pulse generation receiving device to monitor the triggering of the monitoring devices, so that the aim of preventing eavesdropping is further fulfilled; and the outer sheath and the armor layer can protect the cable core and the monitoring device so as to thoroughly prevent the possibility that the optical information in the optical cable is maliciously intercepted.
In conclusion, the high-performance anti-eavesdropping flame-retardant optical cable adopts the multilayer protective armor and the flame-retardant protective structure, can greatly improve the anti-eavesdropping, rat-proof, flame-retardant and impact-resistant performances of the optical cable, protect the optical cable from being easily damaged, reduce the maintenance cost of an operator and be widely applied to national defense and financial communication private network projects such as tunnels, pipelines and the like with strict fire-proof grade compared with single-layer or double-layer protective structures such as GYTS, GYTA53 and the like under the same condition, and has good application prospect and popularization and use values.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic cross-sectional view of the structure of a high-performance anti-eavesdropping flame-retardant optical cable according to an embodiment of the invention;
fig. 2 is a schematic structural view of the high-performance anti-eavesdropping flame-retardant optical cable stripped in the embodiment of the invention.
In the figure: 1-an optical fiber comprising a metal coating; 2-stainless steel sleeve; 3-high flame retardant sheath layer; 4-a metal reinforcement; 5-inner sheath; 6-a monitoring device; 7-an armor layer; 8-outer sheath.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example one
As shown in fig. 1 and 2, this embodiment provides an empty high-performance anti-eavesdropping flame-retardant optical cable, which is applied to land, the optical cable structure comprises a cable core wrapped with a plurality of optical fibers, wherein the cladding surface of each optical fiber is coated with a metal layer to form an optical fiber 1 containing a metal coating, that is, the cladding surface of each optical fiber is coated with metal layers of Au, Cu, Al and the like, the metal layer coated on the cladding surface of the optical fiber in the embodiment is preferably one of metal coatings of gold, copper or aluminum or a mixture thereof, the thickness of the metal layer is in the range of 15-250um, the thickness of the metal layer is about 125um for example, the metal layer material is easy to obtain, the metal layer is coated on the surface of the cladding of the optical fiber, the manufacturing is simple, the thickness of the metal layer is adaptively selected according to the land environment to which the optical cable is applied, and the optical fiber with the metal coating within the thickness range can effectively prevent the optical signal from being leaked out through a long needle of a wiretap instrument through a plurality of experiments.
In the illustrated embodiment, the outer side of the optical cable core is sequentially wrapped with a stainless steel sleeve 2, a high flame-retardant sheath layer 3, a metal reinforcement 4, an inner sheath 5, an armor layer 7 and an outer sheath 8 from inside to outside; specifically, the outer sheath 8 of the present embodiment is made of a flame retardant nylon material, the thickness range of the flame retardant nylon material is 0.8-1mm, the thickness of the flame retardant nylon material of the outer sheath 8 of the present embodiment is 1mm as an example, the outer sheath 8 is made of the flame retardant nylon material, and the outer sheath has a good high temperature resistance, the fire-proof rating of the outer sheath can reach a V0 level, and the nylon material has a high hardness (shore hardness is about 70), so that the optical cable is difficult to be damaged by squirrels, termites and other organisms.
Specifically, the armor layer 7 wrapped on the inner sheath layer in this embodiment is a thickened stainless steel band, the thickness range of the stainless steel band is 0.28-0.3mm, the thickness of the stainless steel band provided in this embodiment is 0.29mm, and the structural design can effectively resist the impact and damage of external force; and the material that inner sheath 5 of parcel on metal reinforcement 4 that this embodiment provided adopts is high fire-retardant sheath material, and the thickness range of high fire-retardant sheath material is 0.8-1mm, and the thickness that this embodiment provided high fire-retardant sheath material takes 0.9mm as an example, and the design of this structure can effectively promote the fire behaviour of fire-retardant in order to protect the inlayer structure of optical cable.
The metal reinforcement 4 wrapped on the outer side of the high flame-retardant sheath layer 3 provided by the embodiment is a galvanized steel wire, the galvanized steel wire is circumferentially wound around the surface of the high flame-retardant sheath layer 3, and the diameter of the galvanized steel wire is more than or equal to 1 mm; the diameter of the galvanized steel wire provided by the embodiment is 1mm as an example, the metal reinforcing part 4 can be used as a further internal protection structure of the optical cable core, even if the structure of the inner sheath 5 is damaged, the difficulty of artificial damage of the optical cable can be improved through the design of the protection structure, and the mechanical performance of the optical cable can be effectively enhanced; meanwhile, the high-flame-retardant sheath layer 3 and the built-in stainless steel sleeve 2 can improve the lateral pressure resistance of the optical cable and protect the stability of the internal optical fiber.
Fig. 1 is a schematic sectional view illustrating a structure of a high-performance anti-eavesdropping flame-retardant optical cable according to an embodiment of the present invention, and the present embodiment further provides a manufacturing method of the high-performance anti-eavesdropping flame-retardant optical cable, including the following steps:
firstly, optical fiber is put into a warehouse;
secondly, coating metal aluminum with the thickness of 125um as a metal layer on the optical fiber and coloring the optical fiber;
thirdly, manufacturing a stainless steel pipe sleeve of the optical fiber 1 with the metal coating, and wrapping the stainless steel pipe sleeve 2 by a high-flame-retardant sheath layer 3 made of high-flame-retardant sheath material;
fourthly, manufacturing a cable core, and densely winding galvanized steel wires with the diameter of 1mm on the surface of the high-flame-retardant protective layer by using a wrapping machine to serve as an internal protective structure of the cable core;
fifthly, manufacturing an inner sheath 5 by using a high-flame-retardant sheath material with the thickness of 0.9mm, and wrapping the outer side of the galvanized steel wire by using the inner sheath 5;
sixthly, manufacturing an outer sheath 8 by using a flame-retardant nylon material with the thickness of 1mm, wrapping the inner sheath by using a stainless steel belt with the thickness of 0.29mm, and wrapping the outer side of the stainless steel belt by using the flame-retardant nylon material;
seventhly, detecting the optical cable, namely detecting whether the optical cable meets the attenuation index and various performances;
and eighthly, taking the finished optical cable out of the warehouse, and taking the optical cable out of the warehouse after the optical cable is detected to be qualified.
In the embodiment, the high-performance anti-eavesdropping flame-retardant optical cable adopts the plurality of metal coating optical fibers 1 to manufacture the cable core, and the structural design ensures that the conventional optical fiber coating fiber stripper cannot strip the metal coating to the bare fiber, so that the purpose of eavesdropping prevention can be effectively prevented by stripping the metal coating optical fibers to the bare fiber; meanwhile, the optical fiber in the cable core has refraction performance due to the protection of the metal coating, and an optical signal can not be leaked out through the long needle of the eavesdropping instrument, so that the purpose of preventing eavesdropping is achieved, the eavesdropping prevention performance of the optical cable can be comprehensively improved, the technical problem that the optical cable is easily eavesdropped due to insufficient protection of the traditional terrestrial optical cable can be effectively solved, the existing eavesdropping prevention optical cable can be effectively overcome to perform the eavesdropping prevention protection measure through a single means, the structural design is simple, and the safety coefficient is high.
Example two
The second embodiment is substantially the same as the first embodiment, except that: the embodiment provides a high-performance anti-eavesdropping flame-retardant optical cable, and as shown in fig. 1, the embodiment is provided with a plurality of monitoring devices 6 in an inner sheath 5, wherein the monitoring devices 6 are arranged in an annular part of the inner sheath 5 at equal intervals along the circumferential direction of the inner sheath 5; and the monitoring device 6 is bonded with the inner sheath 5; in this embodiment, the monitoring device 6 may select a monitoring wire in the prior art, specifically, the monitoring wire is connected to the pulse generation receiving device of the relay station, when the outer sheath 8 and the armor layer 7 of the optical cable and the inner sheath 5 are damaged, the monitoring device 6 is triggered, and the pulse generation receiving device transmits and receives high-voltage electronic pulses to monitor that the monitoring device 6 is triggered, so as to achieve the purpose of eavesdropping prevention; certainly, the present invention is not limited to this, and other monitoring devices 6 in the prior art may also be selected to achieve the function of monitoring whether the inner protection layer structure of the optical cable is damaged by external mechanical stress, so as to prevent the possibility of malicious eavesdropping of optical information in the optical cable.
According to the present invention, the present embodiment further provides a manufacturing method of the high-performance anti-eavesdropping flame-retardant optical cable, which includes the following steps:
firstly, optical fiber is put into a warehouse;
secondly, coating metal copper with the thickness of 150um on the optical fiber as a metal layer and coloring the optical fiber;
thirdly, manufacturing a stainless steel pipe sleeve of the optical fiber 1 with the metal coating, and wrapping the stainless steel pipe sleeve 2 by a high-flame-retardant sheath layer 3 made of high-flame-retardant sheath material;
fourthly, manufacturing a cable core, and densely winding galvanized steel wires with the diameter of 1.2mm on the surface of the high-flame-retardant protective layer by using a wrapping machine to serve as an internal protective structure of the cable core;
fifthly, manufacturing an inner sheath 5 by using a high-flame-retardant sheath material with the thickness of 1mm, and wrapping the outer side of the galvanized steel wire by using the inner sheath 5; the method also comprises the steps of manufacturing monitoring wires, and arranging the monitoring wires into the annular part of the inner sheath 5 at equal intervals along the circumferential direction of the inner sheath 5 when the monitoring wires are cabled;
sixthly, manufacturing the outer sheath 8 by using a flame-retardant nylon material with the thickness of 0.9mm, wrapping the inner sheath by using a stainless steel belt with the thickness of 0.28mm, and wrapping the outer side of the stainless steel belt by using the flame-retardant nylon material;
seventhly, detecting the optical cable, namely detecting whether the optical cable meets the attenuation index and various performances;
and eighthly, taking the finished optical cable out of the warehouse, and taking the optical cable out of the warehouse after the optical cable is detected to be qualified.
In conclusion, the high-performance anti-eavesdropping flame-retardant optical cable disclosed by the invention adopts the optical fiber 1 with the metal coating to manufacture the cable core, adopts the monitoring device 6 to be fused with the 5 layers of the inner sheath of the optical cable, and adopts the multilayer protective armor and flame-retardant protective structure outside the cable core, so that the high-performance anti-eavesdropping flame-retardant optical cable has the characteristics of simple structural design and manufacture, and is ingenious and reasonable.
The present specification and figures are to be regarded as illustrative rather than restrictive, and it is intended that all such alterations and modifications that fall within the true spirit and scope of the invention, and that all such modifications and variations are included within the scope of the invention as determined by the appended claims without the use of inventive faculty.
Claims (10)
1. The utility model provides a fire-retardant optical cable of high performance anti-eavesdropping, the optical cable is including the cable core that the parcel has many optic fibres which characterized in that: the metal-coated optical fiber is formed by coating a metal layer on the surface of a cladding of each optical fiber, and a stainless steel sleeve, a high-flame-retardant sheath layer, a metal reinforcement, an inner sheath, an armor layer and an outer sheath are sequentially wrapped on the outer side of the cable core from inside to outside.
2. The high-performance anti-eavesdropping flame-retardant optical cable according to claim 1, wherein: the metal layer coated on the surface of the cladding of the optical fiber is one of gold, copper or aluminum or a mixture metal coating thereof.
3. The high-performance anti-eavesdropping flame-retardant optical cable according to claim 2, wherein: the thickness range of the metal layer is 15-250 um.
4. A high-performance wiretapping-preventing flame-retardant optical cable according to any one of claims 1 to 3, wherein: the outer sheath is made of flame-retardant nylon materials, and the thickness range of the flame-retardant nylon materials is 0.8-1 mm.
5. A high-performance wiretapping-preventing flame-retardant optical cable according to any one of claims 1 to 3, wherein: the armor layer is a thickened stainless steel band, and the thickness range of the stainless steel band is 0.28-0.3 mm.
6. A high-performance wiretapping-preventing flame-retardant optical cable according to any one of claims 1 to 3, wherein: the inner sheath is made of high-flame-retardant sheath materials, and the thickness range of the high-flame-retardant sheath materials is 0.8-1 mm.
7. The high-performance anti-eavesdropping flame-retardant optical cable according to claim 6, wherein: a plurality of monitoring devices are arranged in the inner sheath, and the monitoring devices are arranged in the annular part of the inner sheath at equal intervals along the circumferential direction of the inner sheath; and the monitoring device is bonded with the inner sheath.
8. A high-performance wiretapping-preventing flame-retardant optical cable according to any one of claims 1 to 3, wherein: the metal reinforcement is a galvanized steel wire, the galvanized steel wire is wound around the surface of the high-flame-retardant sheath layer in the circumferential direction, and the diameter of the galvanized steel wire is larger than or equal to 1 mm.
9. A method for manufacturing a high-performance anti-eavesdropping flame-retardant optical cable according to any one of claims 1 to 8, wherein: the method comprises the following steps:
firstly, optical fiber is put into a warehouse;
secondly, coating a metal layer on the optical fiber and coloring;
thirdly, manufacturing a stainless steel pipe sleeve containing the metal coating optical fiber, and wrapping the stainless steel pipe sleeve by a high-flame-retardant sheath layer made of a high-flame-retardant sheath material;
fourthly, manufacturing a cable core, and winding the metal reinforcing piece on the surface of the high flame-retardant protective layer by using a winding machine;
fifthly, manufacturing an inner sheath, and wrapping the outer side of the metal reinforcement by using the inner sheath;
sixthly, manufacturing an outer sheath, wrapping the inner sheath with an armor layer, and wrapping the outer sheath outside the armor layer;
seventhly, detecting the optical cable, namely detecting whether the optical cable meets the attenuation index and various performances;
and eighthly, taking the finished optical cable out of the warehouse, and taking the optical cable out of the warehouse after the optical cable is detected to be qualified.
10. The method for manufacturing a high-performance anti-eavesdropping flame-retardant optical cable according to claim 9, wherein: in the fifth step, the manufacturing of the inner sheath further comprises manufacturing monitoring devices, and arranging the monitoring devices in the annular part of the inner sheath at equal intervals along the circumferential direction of the inner sheath.
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| CN202110330524.7A CN112904516A (en) | 2021-03-25 | 2021-03-25 | High-performance anti-eavesdropping flame-retardant optical cable and manufacturing method thereof |
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