CN112578512A - Fire-resistant communication optical cable - Google Patents
Fire-resistant communication optical cable Download PDFInfo
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- CN112578512A CN112578512A CN201910927519.7A CN201910927519A CN112578512A CN 112578512 A CN112578512 A CN 112578512A CN 201910927519 A CN201910927519 A CN 201910927519A CN 112578512 A CN112578512 A CN 112578512A
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- communication cable
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 73
- 238000004891 communication Methods 0.000 title claims abstract description 50
- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 229920000098 polyolefin Polymers 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000008397 galvanized steel Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000000779 smoke Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 231100000419 toxicity Toxicity 0.000 description 4
- 230000001988 toxicity Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
Abstract
The present application relates to a fire-resistant optical communication cable comprising: a central reinforcement; a cable core unit; the filling rope and the cable core unit are mutually stranded around the central reinforcing part and are coated outside the central reinforcing part; the fire-resistant layer is coated outside the filling rope and the cable core unit; the fire-resistant layer comprises a first fire-resistant belt, a high-oxygen-content oxygen-isolating material, a ceramic polyolefin layer and a second fire-resistant belt from inside to outside; the steel belt is coated outside the fire-resistant layer; and the outer sheath is coated outside the steel belt. The invention has the beneficial effects that: the time and the speed of temperature transmission to the inside of the cable core are prevented to the maximum extent through the combined fire-insulating layer, the additional attenuation of the optical fiber can be reduced under the high-temperature condition, the integrity of the circuit is kept, and the normal communication is ensured.
Description
Technical Field
The application belongs to the technical field of communication optical cables, and particularly relates to a fire-resistant communication optical cable.
Background
According to the requirements of the latest version DGJ 08-2048-2016 civil building electrical fire protection design rule and GB 50016-2018-building design fire protection specification: the super high-rise building should select the photoelectric cable with the combustion performance of B1 grade or above, the smoke generating toxicity of t0 grade and the combustion dropping/particle grade of d0 grade; in high-rise buildings and public places with dense personnel (shopping malls, schools, subway stations, railway stations, airports, stadiums, exhibition halls, hospitals and the like), the photoelectric cable has the combustion performance of B1 level, the smoke toxicity of t1 level and the combustion drippage/particle level of d1 level.
According to data statistics of Chinese fire annual inspection data in 2017, a fire caused by an electrical reason in 2016 accounts for 36.2%, loss accounts for 46.1%, and electrical line faults account for about 71% of the total number of electrical fires. The electric wire and the electric cable are important components of an electric circuit and have the characteristics of strong concealment, fast propagation, high smoke toxicity and the like.
The concealment is strong: most of the electric wires and cables belong to construction hidden works, are positioned inside a building structure or covered by interior decoration materials, have hidden combustion processes, and are often found in fires, wherein the combustion processes are continued for a period of time.
Rapid spreadability: due to the appearance and application characteristics of the electric wire and the cable, the electric wire and the cable can become a fire propagation medium in the combustion process, and have the characteristics of spanning areas, floors and rooms.
The smoke toxicity is high: the electric wire and cable materials are mostly polyethylene or halides thereof, the smoke generation amount is large during combustion, and because the electric wire and cable are mostly laid in narrow spaces such as groove pipes and the like, the oxygen supply is insufficient, incomplete combustion is easy to form, and the proportion and the concentration of highly toxic components in smoke are increased.
The fire-resistant optical cable for communication is suitable for communication systems such as communication stations, communication machine rooms, data centers, ships, aerospace facilities, mines, nuclear facilities, high-rise buildings, airports, subways, large public places and the like which have important fire safety requirements.
In the prior art, the communication optical cable mainly needs to solve the problems of fire prevention, moisture prevention, stretch resistance and the like, and when a fire disaster happens, the common optical cable has the defects of poor compression resistance and stretch resistance, no flame retardance, no fire resistance and the like, so that the optical cable is damaged, the transmission performance is influenced, and even the signal transmission is interrupted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the fire-resistant communication optical cable is provided for solving the problem of the fire resistance of the communication optical cable in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a fire resistant optical communication cable comprising:
a central reinforcement;
a cable core unit;
the filling rope and the cable core unit are mutually stranded around the central reinforcing part and are coated outside the central reinforcing part;
the fire-resistant layer is coated outside the filling rope and the cable core unit; the fire-resistant layer comprises a first fire-resistant belt, a high-oxygen-resistant material, a ceramic polyolefin layer and a second fire-resistant belt from inside to outside;
the steel strip is coated outside the fire-resistant layer;
and the outer sheath is coated outside the steel belt.
Preferably, in the fire-resistant optical communication cable of the present invention, a first water-blocking yarn is disposed in a gap between the adjacent cable core unit and the central reinforcement and a gap between the adjacent filling rope and the central reinforcement, and a second water-blocking yarn is spirally wound around an entire circumference of the first water-blocking yarn.
Preferably, the fire-resistant optical communication cable of the present invention, the first fire-resistant tape and the second fire-resistant tape are mica tapes or ceramic composite tapes.
Preferably, according to the fire-resistant communication optical cable disclosed by the invention, two third water-blocking yarns are further wrapped outside the filling ropes and the cable core unit in a bidirectional and cross manner.
Preferably, the first fire-resistant tape and the second fire-resistant tape of the fire-resistant optical communication cable are both of wrapping structures, and the overlapping area of the wrapping structures accounts for 15% -35% of the total area.
Preferably, the fire-resistant optical communication cable of the present invention, the high oxygen-indicating oxygen barrier material has an oxygen index of more than 42%.
Preferably, the fire-resistant optical communication cable of the present invention, the steel strip comprises two layers, each layer of steel strip has a cross-sectional shape of a major arc, and the notches of the two layers of steel strips are staggered.
Preferably, the steel strip of the fire-resistant optical communication cable of the present invention is a galvanized steel strip.
Preferably, the fire-resistant optical communication cable of the present invention, the core unit includes:
an optical fiber;
the loose tube is sleeved outside the optical fiber;
and a fiber paste filled between the optical fiber and the loose tube.
Preferably, the fire-resistant optical communication cable of the present invention, the optical fiber has a polyimide coating.
The invention has the beneficial effects that: the time and the speed of temperature transmission to the inside of the cable core are prevented to the maximum extent through the combined fire-insulating layer, the additional attenuation of the optical fiber can be reduced under the high-temperature condition, the integrity of the circuit is kept, and the normal communication is ensured.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a cross-sectional structural schematic view of a fire resistant optical communication cable according to an embodiment of the present application;
FIG. 2 is a structural three-dimensional schematic view of a section of a fire-resistant optical communication cable according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a steel strip according to an example of the present application.
The reference numbers in the figures are:
1 Cable core unit
2 center stiffener
3 filling rope
4 fire-resistant layer
5 Steel strip
6 outer sheath
11 optical fiber
12 loose tube
13 fiber ointment
41 first refractory band
42 high oxygen refers to oxygen-isolating material
43 cerammed polyolefin layer
44 second refractory band
71 first water-blocking yarn
72 second Water blocking yarn
73 third water blocking yarn.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 application can be understood by those of ordinary skill in the art through specific situations.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Examples
The present embodiment provides a fire-resistant optical communication cable as shown in fig. 1 and 2, including:
a central reinforcement 2;
a cable core unit 1;
the filling rope 3 and the cable core unit 1 are mutually stranded around the central reinforcing part 2 and are coated outside the central reinforcing part 2; the filling rope 3 is used for being mixed with the cable core unit 1 to be twisted, so that the gap is reduced, and the stress is shared;
the fire-resistant layer 4 is coated outside the filling rope 3 and the cable core unit 1; the fire-resistant layer 4 comprises a first fire-resistant belt 41, a high-oxygen-content oxygen-isolation material 42, a ceramic polyolefin layer 43 and a second fire-resistant belt 44 from inside to outside;
the steel belt 5 is coated outside the fire-resistant layer 4;
and the outer sheath 6 is coated outside the steel belt 5.
According to the fire-resistant communication optical cable, the time and the speed of temperature transmission to the inside of the cable core are prevented to the maximum extent through the combined fire-resistant layer 4, wherein the high-oxygen-content oxygen-insulating material 42 in a combustion environment generates a large amount of water to reduce the internal temperature, and meanwhile, the crust is a loose body to play a role in heat insulation; steel belts are good fire barriers. In an experiment, the fire-resistant communication optical cable of the embodiment can ensure that the additional attenuation of the optical fiber is less than 1.0dB within the flame temperature of 750 ℃ and the burning time of 90 minutes, namely the integrity of a line is maintained, and normal communication can be realized.
Preferably, in the fire-resistant optical communication cable of the present embodiment, as shown in fig. 2, a first water-blocking yarn 71 is disposed in a gap between the adjacent cable core unit 1 and the filling cord 3 and the central strength member 2, and a second water-blocking yarn 72 is spirally wound on an entire circumference of the first water-blocking yarn 71. As shown in fig. 2, since the cross section of each fiber loose tube unit 1 is circular, a gap is formed between adjacent fiber loose tube units 1, the first water-blocking yarn 71 fills the gap to better prevent water and moisture, and the second water-blocking yarn 72 has a function of fixing the first water-blocking yarn 71 while playing a certain waterproof role, thereby playing dual roles of water blocking and binding.
Preferably, in the fire-resistant optical communication cable of the present embodiment, the first fire-resistant tape 41 and the second fire-resistant tape 44 are mica tapes or ceramic composite tapes.
Preferably, in the fire-resistant optical communication cable of the present embodiment, as shown in fig. 2, two third water-blocking yarns 73 are further wrapped around the outside of the filling rope 3 and the cable core unit 1 in a bidirectional crossing manner, so as to perform the dual functions of water blocking and ribbon binding. (the actual pitch may vary for the sake of illustration in order to make the water-blocking yarn structure evident.)
Preferably, in the fire-resistant optical communication cable of the present embodiment, the first fire-resistant tape 41 and the second fire-resistant tape 44 are both of a wrapping structure, and an overlapping area of the wrapping occupies 15% to 35% of a total area. The purpose of protecting the cable core unit by heat insulation is achieved.
Preferably, in the fire-resistant optical communication cable of the present embodiment, the oxygen index of the high oxygen indicator oxygen barrier material 42 is greater than 42%.
Preferably, in the fire-resistant optical communication cable of the present embodiment, as shown in fig. 3, the steel strip 5 includes two layers, each layer of the steel strip 5 has a major arc in cross section, and the notches of the two layers of the steel strip 5 are staggered. And under the condition of ensuring the coverage rate of the steel belt, the area of the steel belt is reduced as much as possible, and the cost is saved.
Preferably, in the fire-resistant optical communication cable of the present embodiment, the steel strip 5 is a galvanized steel strip.
Preferably, in the fire-resistant optical communication cable of the present embodiment, the core unit 1 includes:
an optical fiber 11;
a loose tube 12 fitted outside the optical fiber 11;
and a fiber paste 13 filled between the optical fiber 11 and the loose tube 12.
Preferably, in the fire-resistant optical communication cable of the present embodiment, the optical fiber 11 has a polyimide coating.
The following are preferred parameters for the fire resistant optical communication cable components of this embodiment:
optical fiber: 2-12 cores and a high-temperature-resistant optical fiber, wherein the optical fiber coating is made of a high-temperature-resistant 300 ℃ polyimide material, and the diameter of the coating is 220 +/-5 mu m;
fiber paste: filling the inner space of the loose sleeve with halogen-free low-smoke flame-retardant paste;
loosening the sleeve: the PBT material is adopted, so that the hydrolysis resistance is improved;
filling a rope: adopting halogen-free low-smoke flame-retardant polyolefin material;
a central reinforcement: adopting FRP nonmetal reinforcement;
water-blocking yarn: 1 water-blocking yarn is respectively wound and flatly placed on the central reinforcing piece, and 2 water-blocking yarns are wound and lapped outside the cable core in a bidirectional and crossed manner to play double roles of water blocking and binding;
a refractory layer: the fireproof flame-retardant polyolefin inner liner comprises 2 layers of formed cloud belt wrapping (the overlapping rate is 25%), 1 layer of extruded halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer (the oxygen index is more than 42%) with the thickness of 1.0mm, 1 layer of extruded ceramic polyolefin inner liner with the thickness of 1.0mm, and 2 layers of wrapped ceramic fireproof composite belt (the overlapping rate is 25%). The purpose is to prevent the time and the speed of temperature transmission to the inside of the cable core to the maximum extent through the combined fire-insulating layer;
steel strip: 2 layers of 0.2mm galvanized steel strips are wound outside the fireproof layer in a gap wrapping mode, the gap rate is less than 50%, and the steel strips are good fire-proof materials;
outer sheath: and extruding and coating 1 layer of halogen-free low-smoke flame-retardant polyolefin material sheath with the thickness of 2.0mm and the oxygen index of more than 36 percent outside the steel strip.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A fire resistant optical communication cable, comprising:
a central reinforcement (2);
a cable core unit (1);
the filling rope (3) and the cable core unit (1) are mutually stranded around the central reinforcing part (2) and are coated outside the central reinforcing part (2);
the fire-resistant layer (4) is coated outside the filling rope (3) and the cable core unit (1); the fire-resistant layer (4) comprises a first fire-resistant belt (41), a high-oxygen-finger oxygen-isolating material (42), a ceramic polyolefin layer (43) and a second fire-resistant belt (44) from inside to outside;
the steel belt (5) is coated outside the fire-resistant layer (4);
and the outer sheath (6) is coated outside the steel belt (5).
2. The fire-resistant optical communication cable according to claim 1, wherein a first water-blocking yarn (71) is provided in a gap between the adjacent core unit (1) and the filling cord (3) and the central strength member (2), and a second water-blocking yarn (72) is spirally wound around the entire circumference of the first water-blocking yarn (71).
3. The fire-resistant optical communication cable according to claim 2, wherein the first and second fire-resistant tapes (41, 44) are mica tapes or ceramic-composite tapes.
4. The fire-resistant optical communication cable according to any one of claims 1 to 3, wherein two third water-blocking yarns (73) are further wrapped around the outside of the filling rope (3) and the core unit (1) in a bidirectional crossing manner.
5. The fire resistant optical communication cable of any one of claims 1 to 4, wherein the first and second fire resistant tapes (41, 44) are each of a wrapped configuration, the overlapping area of the wrapping being between 15% and 35% of the total area.
6. The fire resistant optical communication cable of any one of claims 1 to 5, wherein the high oxygen barrier material (42) has an oxygen index greater than 42%.
7. Fire-resistant optical communication cable according to any one of claims 1 to 6, wherein said steel strip (5) comprises two layers, each layer of steel strip (5) having a cross-sectional shape of a major arc, the notches of the two layers of steel strip (5) being offset from each other.
8. Fire resistant optical communication cable according to claim 7, characterized in that the steel strip (5) is a galvanized steel strip.
9. The fire-resistant optical communication cable according to any one of claims 1 to 8, wherein the core unit (1) comprises:
an optical fiber (11);
a loose tube (12) fitted around the outside of the optical fiber (11);
and a fiber paste (13) filled between the optical fiber (11) and the loose tube (12).
10. The fire-resistant optical communication cable according to claim 9, wherein the optical fiber (11) has a polyimide coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910927519.7A CN112578512A (en) | 2019-09-27 | 2019-09-27 | Fire-resistant communication optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910927519.7A CN112578512A (en) | 2019-09-27 | 2019-09-27 | Fire-resistant communication optical cable |
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| Publication Number | Publication Date |
|---|---|
| CN112578512A true CN112578512A (en) | 2021-03-30 |
Family
ID=75110147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910927519.7A Pending CN112578512A (en) | 2019-09-27 | 2019-09-27 | Fire-resistant communication optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112578512A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504617A (en) * | 2021-05-31 | 2021-10-15 | 江苏通鼎光电科技有限公司 | Water-blocking optical cable with high pressure resistance and high impact resistance |
| CN113568122A (en) * | 2021-08-17 | 2021-10-29 | 四川天府江东科技有限公司 | Bulletproof butterfly-shaped cable |
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Application publication date: 20210330 |
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