CN211263885U - Flame-retardant optical cable - Google Patents
Flame-retardant optical cable Download PDFInfo
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- CN211263885U CN211263885U CN201922421870.7U CN201922421870U CN211263885U CN 211263885 U CN211263885 U CN 211263885U CN 201922421870 U CN201922421870 U CN 201922421870U CN 211263885 U CN211263885 U CN 211263885U
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Abstract
The application discloses fire-retardant optical cable includes: the first sheath layer is provided with a first cavity; the second sheath layer is provided with a second cavity, and the second sheath layer is sleeved in the first cavity; the shielding layer is arranged between the first sheath layer and the second sheath layer; the cable core is arranged in the second sheath layer and comprises a plurality of groups of optical fiber assemblies; the first flame-retardant layer is coated on the outer side of the cable core and is coated in a longitudinal coating mode; the fire-retardant layer of second, this fire-retardant layer parcel of second is in the optic fibre subassembly outside, and the fire-retardant layer of second adopts the mode of lapping to carry out the cladding. This application not only realizes the holistic fire prevention protection of optical cable core through setting up two-layer fire-retardant layer, also prevents fire prevention protection to singly organizing the fiber assembly. With this arrangement, it is possible to avoid a situation where the optical fiber assembly 6 catches fire due to lack of protection after the first flame retardant layer 4 is damaged.
Description
Technical Field
The application relates to the technical field of optical cables, in particular to a flame-retardant optical cable.
Background
With the arrival of the 5G era, the service range of the communication technology service industry in China is wider and wider, so that the use environment of the communication optical cable is more and more diversified, and therefore, the improvement is carried out according to the use environment on the basis of the traditional optical cable structure. In some important places, such as large stores, theaters, airports, high-rise buildings, hotels, central machine rooms and the like, in order to ensure that communication lines are intact, optical cables with high flame retardant property are generally adopted.
In the flame-retardant optical cable in the prior art, generally, an optical fiber is sleeved in a loose tube filled with fiber paste, a plurality of loose tubes and a filling rope are arranged around a metal central reinforcement, a yarn binding layer is arranged outside the loose tubes and the filling rope, cable paste is filled in all gaps in a cable core, and a flame-retardant sheath layer is arranged outside the yarn binding layer, so that the flame-retardant optical cable is deficient in fireproof performance.
Meanwhile, the size requirement of users on the optical cable is higher and higher, and the purpose of saving wiring space is achieved by requiring the optical cable to resist pressure, so that the optical cable is easy to crush and damage in installation, the optical cable is damaged due to heavy object knocking, falling object impact and the like, the transmission performance of the optical cable is influenced, and even signal transmission interruption is caused.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a flame-retardant optical cable, and solves the problems that the communication optical cable is lack of fireproof and flame-retardant performance and weak in extrusion resistance in the prior art.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a flame-retardant optical cable comprising: the first sheath layer is cylindrical and is provided with a first cavity; the second sheath layer is cylindrical and is provided with a second cavity, and the second sheath layer is sleeved in the first cavity; the shielding layer is arranged between the first sheath layer and the second sheath layer; the cable core is arranged in the second sheath layer and comprises a plurality of groups of optical fiber assemblies; the first flame-retardant layer is coated on the outer side of the cable core in a longitudinal coating mode, the first flame-retardant layer is overlapped at the overlapping position, and the overlapping rate is more than or equal to 25%; the fire-retardant layer of second, this fire-retardant layer parcel of second is in the optic fibre subassembly outside, and the fire-retardant layer of second adopts the mode of lapping to wrap the cladding, and the fire-retardant layer of second overlaps in overlapping department, and the overlap rate is waited for or is equal to 25%.
In the technical scheme, the two flame-retardant layers are arranged, so that the overall fireproof protection of the optical cable core is realized, and the fireproof protection of a single group of optical fiber assemblies is also realized. With this arrangement, it is possible to avoid a situation where the optical fiber assembly 6 catches fire due to lack of protection after the first flame retardant layer 4 is damaged.
Further, according to the embodiment of the application, the first sheath layer and the second sheath layer are made of low-smoke halogen-free materials.
Further, according to the embodiment of the application, the thickness of the first sheath layer and the second sheath layer is not less than 1.5 mm.
Further, according to the embodiment of the application, the shielding layer is formed by weaving a plurality of metal wires.
Further, according to the embodiment of the application, the first flame-retardant layer and the second flame-retardant layer are made of mica tapes.
Further in accordance with an embodiment of the present application, wherein the optical cable assembly comprises: a plurality of optical fibers; the loose tube is wrapped on the outer sides of the optical fibers; and ointment filled between the loose tube and the optical fibers.
Further in accordance with an embodiment of the present application, wherein the optical fiber has a plurality of identification colors.
Further, according to the embodiment of the application, the loose tube is extruded by using a PBT material.
Further, according to the embodiment of the application, wherein, the cable core still includes: a core surrounded by the optical fiber assembly at the center of the cable core; a filler disposed between the fiber optic assemblies.
Further, according to this application embodiment, wherein, be provided with the tear rope between first restrictive coating and the first fire-retardant layer.
Compared with the prior art, the method has the following beneficial effects: this application not only realizes the holistic fire prevention protection of optical cable core through setting up two-layer fire-retardant layer, also prevents fire prevention protection to singly organizing the fiber assembly. With this arrangement, it is possible to avoid a situation where the optical fiber assembly 6 catches fire due to lack of protection after the first flame retardant layer 4 is damaged.
Drawings
The present application is further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a flame retardant cable in the present application.
Fig. 2 is a schematic diagram of the structure of the fiber optic assembly of fig. 1.
Fig. 3 is a schematic structural view of the reinforcing member of fig. 1.
In the attached drawings
1. First restrictive coating 2, shielding layer 3, second restrictive coating
4. First flame retardant layer 5, tear rope 6, optic fibre subassembly
7. Filler 8, reinforced core 9 and second flame-retardant layer
10. Loose tube 11, optical fiber 12 and ointment
13. Insulating layer 14, steel wire
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The present application is directed to a specific structure of a flame-retardant optical cable by fig. 1, fig. 2 for a specific structure of an optical fiber assembly, and fig. 3 for a specific structure of a strength member. As shown in fig. 1-3, the flame-retardant optical cable described herein includes a first jacket layer 1, a shielding layer 2, a second jacket layer 3, a first flame-retardant layer 4 and optical fiber assemblies 6, wherein the cable core is formed by twisting a plurality of groups of optical fiber assemblies 6, and the first flame-retardant layer 4, the second jacket layer 3, the shielding layer 2 and the first jacket layer 1 are sequentially wrapped outside the cable core.
In the flame-retardant optical cable, the first sheath layer 1 and the second sheath layer 3 are both cylindrical, and have a first hollow cavity and a second hollow cavity which are specifically hollow inside. First restrictive coating 1 and second restrictive coating 3 are made by low smoke and zero halogen flame retardant sheathing material, and first restrictive coating 1 and second restrictive coating 3 that low smoke and zero halogen flame retardant sheathing material made not only can effectively prevent stretching of intensity of a fire when the optical cable meets the conflagration, can not produce harmful gas moreover, and then win more time for the rescue of putting out a fire, reduce casualties and the loss of property of personnel. Preferably, the thickness of the first and second sheathing layers 1 and 3 is not less than 1.5 mm.
In a flame-retardant optical cable of the present application, a shielding layer 2 is disposed between a first jacket layer 1 and a second jacket layer 3. The shielding layer 2 is formed by weaving a plurality of metal wires, so that the shielding effect can be provided, the strength and the pressure resistance of the optical cable can be improved, the cable core arranged in the optical cable is prevented from being bitten by mice and other animals, and the service life of the optical cable is further prolonged.
In the flame-retardant optical cable, the first flame-retardant layer 4 is formed by specifically coating a cable core with a fire-resistant mica tape. The first flame-retardant layer 4 can provide a fireproof and flame-retardant protection function for the cable core, and meanwhile, the cable core can be twisted round.
In one flame retardant fiber optic cable described herein, the number of optical fiber assemblies 6 is specifically four. The outer side of each group of optical fiber assemblies 6 is coated with a second flame-retardant layer 9, the second flame-retardant layer 9 is formed by coating the optical fiber assemblies with fire-resistant mica tapes, a fireproof and flame-retardant protection function is provided for the single group of optical fiber assemblies 6, and the fire resistance of the flame-retardant optical cable is further improved.
In the technical scheme, the two flame-retardant layers are arranged, so that the overall fireproof protection of the optical cable core is realized, and the fireproof protection of a single group of optical fiber assemblies is also realized. With this arrangement, it is possible to avoid a situation where the optical fiber assembly 6 catches fire due to lack of protection after the first flame retardant layer 4 is damaged. In addition, in this application, the first flame-retardant layer 4 is longitudinally wrapped on the outer side of the cable core, and the overlapping part of the first flame-retardant layer 4 is overlapped, the overlapped part is a first overlapped part, and the overlapping rate is greater than or equal to 25%. The second flame-retardant layer 9 is wrapped on the optical fiber assembly 6 in a wrapping mode, the overlapping positions of the second flame-retardant layer 9 are overlapped, the overlapped part is a second overlapped part, and the overlapping rate is more than or equal to 25%. The two flame-retardant layers adopt different covering modes, because the diameter of the cable core is far larger than that of the single-group optical fiber assembly, the covering mode of the second flame-retardant layer 9 is more convenient.
In a flame-retardant optical cable according to the present application, the optical fiber assembly 6 includes a loose tube 10 and a plurality of optical fibers 11, the optical fibers 11 having a plurality of identification colors. The loose tube 10 is wrapped on the outer sides of the optical fibers 11, and the loose tube 10 is made of PBT (polybutylene terephthalate) materials through extrusion so as to mechanically protect the optical fibers 11. A factice 12 is filled between the loose tube sleeve 10 and the optical fiber, and the factice 12 is specifically a fiber paste, and more specifically can also be a flame-retardant fiber paste. The ointment 12 has the main function of water resistance, and if the flame-retardant fiber ointment is adopted, the fireproof performance of the optical cable can be enhanced. Meanwhile, the ointment 12 can protect the optical fiber from stress in the loose tube 10, and the communication quality and the service life of the cable are improved.
In the flame-retardant optical cable, a reinforced core 8 is arranged in the center of a cable core, and the reinforced core 8 is surrounded in the center of the cable core by an optical fiber assembly. The reinforcing core 8 comprises steel wires 14 and an insulating layer 13 wrapped around the outside of the steel wires 14. The steel wire 14 is specifically a high-strength phosphatized steel wire, and the tensile strength of the steel wire 14 is not lower than 2000 MPa. Insulating layer 13 in the 14 outsides of steel wire adopts the PVC plastics to make, plays insulating protective action to steel wire 14, and can prevent that steel wire 14 from rustting by the tide, also can prevent that the steel wire is electrically conducted overheated, leads to the inside spontaneous combustion of cable core to catch fire.
In a flame-retardant optical cable according to the present application, a filler 7 is disposed between optical fiber assemblies 6 for filling. The filler 7 specifically adopts aramid yarn or glass fiber yarn, and firstly plays a role in resisting pulling, and secondly, the fireproof flame-retardant material can absorb heat emitted by the optical fiber assembly 6 in the using process.
In the flame-retardant optical cable, a tearing rope 5 is arranged between the second sheath layer 3 and the first flame-retardant layer 4. The tearing rope 5 is specifically made of aramid yarn or glass fiber yarn. The tearing rope 5 is arranged to play a role in resisting pulling and assist in stripping the wire, namely the second sheath layer 3 can be stripped through the tearing rope 5 after a small opening is cut in the second sheath layer 3 during wiring. In addition, the tearing rope 5 is made of fireproof flame-retardant materials and can absorb heat emitted by the optical cable in the using process.
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.
Claims (10)
1. A flame-retardant optical cable, comprising:
the first sheath layer is cylindrical and is provided with a first cavity;
the second sheath layer is cylindrical and is provided with a second cavity, and the second sheath layer is sleeved in the first cavity;
the shielding layer is arranged between the first sheath layer and the second sheath layer;
the cable core is arranged in the second sheath layer and comprises a plurality of groups of optical fiber assemblies;
the first flame-retardant layer is coated on the outer side of the cable core in a longitudinal coating mode, the first flame-retardant layer is overlapped at the overlapping position, and the overlapping rate is greater than or equal to 25%;
the second flame-retardant layer wraps the outer side of the optical fiber assembly, the second flame-retardant layer is wrapped in a wrapping mode, the second flame-retardant layer is overlapped at the overlapping position, and the overlapping rate is larger than or equal to 25%.
2. A flame retardant fiber optic cable according to claim 1, wherein said first jacket layer and said second jacket layer are formed from a low smoke zero halogen material.
3. A flame-retardant optical cable according to claim 1, wherein the thickness of said first and second sheath layers is not less than 1.5 mm.
4. The flame-retardant optical cable according to claim 1, wherein the shielding layer is woven by a plurality of metal wires.
5. The flame-retardant optical cable according to claim 1, wherein the first flame-retardant layer and the second flame-retardant layer are made of mica tapes.
6. A flame retardant fiber optic cable according to claim 1, wherein the fiber optic assembly comprises:
a plurality of optical fibers;
the loose tube is wrapped on the outer sides of the optical fibers;
and the ointment is filled between the loose tube and the optical fibers.
7. A fire resistant optical cable according to claim 6, wherein the optical fibre has a plurality of identification colours.
8. A fire-retardant optical cable according to claim 6, wherein said loose tube is extruded from PBT material.
9. A flame retardant optical cable according to claim 1, wherein said core further comprises:
a strength member surrounded by the optical fiber assembly at a center of the cable core;
a filler disposed between the fiber optic assemblies.
10. A flame-retardant optical cable according to claim 1, wherein a ripcord is provided between the first sheath layer and the first flame-retardant layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922421870.7U CN211263885U (en) | 2020-06-24 | 2020-06-24 | Flame-retardant optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922421870.7U CN211263885U (en) | 2020-06-24 | 2020-06-24 | Flame-retardant optical cable |
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| Publication Number | Publication Date |
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| CN211263885U true CN211263885U (en) | 2020-08-14 |
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| CN201922421870.7U Active CN211263885U (en) | 2020-06-24 | 2020-06-24 | Flame-retardant optical cable |
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| CN (1) | CN211263885U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929786A (en) * | 2020-08-25 | 2020-11-13 | 宏安集团有限公司 | High-flame-retardant wear-resistant corrosion-resistant special optical cable |
-
2020
- 2020-06-24 CN CN201922421870.7U patent/CN211263885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929786A (en) * | 2020-08-25 | 2020-11-13 | 宏安集团有限公司 | High-flame-retardant wear-resistant corrosion-resistant special optical cable |
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Address after: 215600 teenchi, No. 12, Chuangye Road, Jinfeng Town, Zhangjiagang, Suzhou City, Jiangsu Province Patentee after: Shanghai Electric Group tengenchi Technology (Suzhou) Co.,Ltd. Address before: 215600 teenchi, No. 12, Chuangye Road, Jinfeng Town, Zhangjiagang, Suzhou City, Jiangsu Province Patentee before: ZHANGJIAGANG TWENTSCHE CABLE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |