CN210982829U - High flame-retardant communication optical cable for rail transit - Google Patents
High flame-retardant communication optical cable for rail transit Download PDFInfo
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- CN210982829U CN210982829U CN201921629235.1U CN201921629235U CN210982829U CN 210982829 U CN210982829 U CN 210982829U CN 201921629235 U CN201921629235 U CN 201921629235U CN 210982829 U CN210982829 U CN 210982829U
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Abstract
The application relates to a high fire-retardant communication optical cable for track traffic, include: a central reinforcement; the cable core units are mutually twisted around the central reinforcing part and are coated outside the central reinforcing part; the oxygen-isolating flame-retardant layer wraps the cable core unit and the outer side of the whole central reinforcing piece, and comprises a first ceramic fire-resistant composite belt, a longitudinally-wrapped embossed aluminum-plastic composite belt, an oxygen-isolating layer and a second ceramic fire-resistant composite belt from inside to outside; the flame-retardant cable paste is filled between the central reinforcing piece and the oxygen-isolating flame-retardant layer; and the sheath is coated outside the oxygen-isolating flame-retardant layer. The utility model discloses an reach the fire behaviour requirement, adopt the multilayer to separate the fire layer, the fire-resistant compound area of pottery + separates the oxygen layer + the fire-resistant compound area of pottery, produce the thermal-insulated loose body of crust heat-insulating during the burning, realize thermal-insulated, the cooling.
Description
Technical Field
The application belongs to the technical field of communication optical cables, and particularly relates to a high-flame-retardant communication optical cable for rail transit.
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.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the high flame-retardant communication optical cable for rail transit is provided for solving the problem of insufficient flame-retardant performance of the communication optical cable in the prior art.
The utility model provides a technical scheme that its technical problem adopted is: a high flame-retardant communication optical cable for rail transit, comprising:
a central reinforcement;
the cable core units are mutually twisted around the central reinforcing piece and are wrapped outside the central reinforcing piece, and the cable core units are rotationally and symmetrically arranged around the central reinforcing piece;
the oxygen-isolating flame-retardant layer wraps the cable core unit and the outer side of the central reinforcing piece integrally, and comprises a first ceramic fire-resistant composite belt, a longitudinally-wrapped embossed aluminum-plastic composite belt, an oxygen-isolating layer and a second ceramic fire-resistant composite belt from inside to outside;
the flame-retardant cable paste is filled between the central reinforcing piece and the oxygen-isolating flame-retardant layer;
and the sheath is coated outside the oxygen-isolating flame-retardant layer.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, the fire-resistant composite area of second pottery and the composite area is moulded to the steel that still is equipped with the longitudinal wrapping embossing between the sheath.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, the fire-resistant composite area of first pottery porcelain is in around the package the cable core unit with the holistic outside of central reinforcement, the fire-resistant composite area of first pottery porcelain occupies more than 20% of total area around the overlapping area of package.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, the fire-resistant composite tape outside of first pottery alternately twines two yarns that block water still.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, indulge the package embossing plastic-aluminum composite tape around the package first pottery fire-resistant composite tape outside, the overlap joint is filled there is fire-retardant coating oleamen.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, indulge the package embossing plastic-aluminum composite tape with the cable core unit with the holistic clearance of central reinforcement is 0.6-0.8 mm.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, the fire-resistant composite tape outside cross winding of second pottery blocks water the yarn for two.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, indulge the package embossing steel and plastic composite tape and wrap the pottery fire-resistant composite tape outside of second, the edge is taken and is covered the width and be greater than 6mm, and the overlap joint is filled there is fire-retardant coating oleamen.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, indulge the package embossing steel and plastic composite tape outside and still alternately wind two yarns that block water.
Preferably, the utility model discloses a high fire-retardant communication optical cable for track traffic, the material of sheath is low heat and releases halogen-free low cigarette fire-retardant polyolefin.
The utility model has the advantages that: the volume of combustible materials is reduced, and compared with the common optical cable, the common fiber paste, the cushion layer and the cable paste high-heat-release material are replaced by the low-heat-release flame-retardant fiber paste, the low-smoke halogen-free material and the flame-retardant cable paste;
in order to meet the requirement of flame retardant property, a plurality of fire-proof layers, a ceramic fire-proof composite belt, an oxygen-proof layer and a ceramic fire-proof composite belt are adopted, and a crusting heat-insulating loose body is generated during combustion to realize heat insulation and temperature reduction;
the oxygen content in the cable core is reduced by reducing the gap between the aluminum-plastic and steel-plastic composite belt and the cable core.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
Fig. 1 is a schematic cross-sectional structure view of a highly flame-retardant communication optical cable for rail transit according to an embodiment of the present application.
The reference numbers in the figures are:
1 center stiffener
2 cable core unit
3 flame-retardant cable paste
4 first ceramic refractory composite band
5 longitudinal-wrapped embossing aluminum-plastic composite belt
6 oxygen barrier layer
7 second ceramized refractory composite strip
8 longitudinal-wrapped embossing steel-plastic composite belt
9 protective sleeve
11 FRP nonmetal reinforcing part
12 halogen-free low-smoke flame-retardant polyolefin cushion layer
21 optical fiber bundle
22 flame-retardant fiber paste
23 PBT loose tube.
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, unless otherwise specified, "a plurality" means two or more.
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 embodiment provides a high flame retardant communication optical cable for rail transit, as shown in fig. 1, including:
a central reinforcement 1;
the cable core units 2 are mutually twisted around the central reinforcing part 1 and coated outside the central reinforcing part 1, and the cable core units 2 are rotationally and symmetrically arranged around the central reinforcing part 1;
the oxygen-isolating flame-retardant layer wraps the cable core unit 2 and the outer side of the central reinforcement 1 integrally, and comprises a first ceramic fire-resistant composite belt 4, a longitudinally-wrapped embossed aluminum-plastic composite belt 5, an oxygen-isolating layer 6 and a second ceramic fire-resistant composite belt 7 from inside to outside;
the flame-retardant cable paste 3 is filled between the central reinforcing piece 1 and the oxygen-isolating flame-retardant layer;
and the sheath 9 is coated outside the oxygen-isolating flame-retardant layer.
Compared with the common optical cable, the high-flame-retardant communication optical cable for rail transit has the advantages that the common fiber paste, the cushion layer and the cable paste high-heat-release material are replaced by the low-heat-release flame-retardant fiber paste, the low-smoke halogen-free material and the flame-retardant cable paste; by adopting a plurality of fire insulation layers, the ceramic fire-resistant composite belt, the oxygen insulation layer and the ceramic fire-resistant composite belt, a crusting heat-insulating loose body is generated during combustion, and heat insulation and cooling are realized. The longitudinal-covering embossed aluminum-plastic composite belt is embossed to improve the bending resistance of the optical cable, and the aluminum-plastic composite structure simultaneously plays a role in moisture blocking and heat insulation.
Preferably, in the optical cable for highly flame retardant communication in rail transit of the present embodiment, a longitudinal embossing steel-plastic composite strip 8 is further disposed between the second ceramic fire-resistant composite strip 7 and the sheath 9. The longitudinal-wrapped embossed steel-plastic composite belt 8 plays roles in moisture blocking, armoring and heat insulation, and embossing aims to improve the bending resistance of the optical cable.
Preferably, in the optical communication cable for rail transit of the present embodiment, the first ceramic fire-resistant composite tape 4 is wrapped around the outside of the whole of the cable core unit 2 and the central reinforcing member 1, and an overlapping area of the wrapped first ceramic fire-resistant composite tape 4 accounts for more than 20% of a total area.
Preferably, in the optical communication cable for rail transit of the present embodiment, two water-blocking yarns are further cross-wound outside the first ceramic fire-resistant composite tape 4. The water-blocking yarn plays a role in blocking water.
Preferably, in the highly flame-retardant communication optical cable for rail transit of the present embodiment, the longitudinally-wrapped embossed aluminum-plastic composite tape 5 is wrapped outside the first ceramic fire-resistant composite tape 4, and the lap joint is filled with a flame-retardant coating ointment. The flame-retardant coating ointment has the function of water resistance.
Preferably, in the highly flame-retardant communication optical cable for rail transit of the embodiment, the gap between the longitudinally-wrapped embossed aluminum-plastic composite tape 5 and the cable core unit 2 and the whole central reinforcing member 1 is 0.6-0.8mm, so that the gap between the aluminum-plastic composite tape and the cable core is small enough, the longitudinal water blocking effect is achieved, and meanwhile, the cable core is compact, the oxygen content is reduced, and the flame retardant effect is improved.
Preferably, in the optical communication cable for rail transit of the present embodiment, two water-blocking yarns are cross-wound outside the second ceramic fire-resistant composite tape 7. Preferably, the pitch is 50mm, and the water blocking effect is achieved.
Preferably, in the highly flame-retardant communication optical cable for rail transit of the present embodiment, the longitudinally-wrapped embossed steel-plastic composite tape 8 is wrapped outside the second ceramic fire-resistant composite tape 7, the overlapping width of the edge is greater than 6mm, and the overlapping portion is filled with a flame-retardant coating ointment.
Preferably, in the optical cable for highly flame retardant communication in rail transit of the present embodiment, two water blocking yarns are further cross-wound outside the longitudinally-wrapped embossed steel-plastic composite tape 8. The preferred pitch of the water blocking yarn is 50mm, and the water blocking yarn plays a water blocking role. The diameter of the sizing die is 0.8-1.0mm larger than the diameter of the cable core, so that the clearance between the steel-plastic composite belt and the cable core is small enough, the longitudinal water-blocking effect is achieved, meanwhile, the cable core is compact, the oxygen content is reduced, and the flame-retardant effect is improved.
Preferably, in the optical communication cable for rail transit of the present embodiment, the material of the sheath 9 is low-heat-release halogen-free low-smoke flame-retardant polyolefin. The thickness is increased by 10 percent compared with the normal thickness of the common cable, the nominal thickness is 2.2mm, and the cooling and heat insulation effects are improved; the sheath adopts an extrusion die, the inner diameter of the die core is about 0.5mm larger than the diameter of the formed longitudinally-wrapped corrugated steel-plastic composite belt 8, and the inner diameter of the die sleeve is 1.0mm larger than the diameter of the sheath 9 after actual forming. The stretching amount of the sheath is reduced as much as possible, and the anti-cracking performance is improved. The mold core and the mold sleeve are used for extruding the optical cable sheath, an integral inner core formed by the longitudinally-wrapped embossed steel-plastic composite belt 8 and elements coated in the composite belt penetrates through the mold core, and sheath materials are extruded from a gap formed between the mold core and the mold sleeve to form the sheath 9.
The preferred specification parameters for the components of this embodiment are as follows:
the central reinforcement 1 consists of an FRP nonmetal reinforcement 11 and a halogen-free low-smoke flame-retardant polyolefin cushion layer 12 from inside to outside;
the cable core unit 2 adopts optical fiber bundles 21(2, 4, 6, 8, 10 and 12 cores) from inside to outside; flame-retardant fiber paste 22; a PBT loose tube 23;
the thickness of the first ceramic fireproof composite belt 4 is 0.2 mm;
the thickness of the longitudinal embossing aluminum-plastic composite belt 5 is 0.25 mm;
the oxygen index of the oxygen isolation layer 6 is more than 40%, the thickness is increased by 20% compared with the normal thickness of the common cable, and the nominal thickness is 1.2 mm;
the thickness of the second ceramic fireproof composite belt 7 is 0.2 mm;
the thickness of the longitudinal embossing steel-plastic composite belt 8 is 0.25 mm.
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 high flame retardant communication optical cable for rail transit, comprising:
a central reinforcement (1);
the cable core units (2) are stranded around the central reinforcing part (1) and coated outside the central reinforcing part (1), and the cable core units (2) are rotationally and symmetrically arranged around the central reinforcing part (1);
the oxygen-isolating flame-retardant layer wraps the cable core unit (2) and the outer side of the central reinforcement (1) integrally, and comprises a first ceramic fire-resistant composite belt (4), a longitudinally-wrapped embossed aluminum-plastic composite belt (5), an oxygen-isolating layer (6) and a second ceramic fire-resistant composite belt (7) from inside to outside;
the flame-retardant cable paste (3) is filled between the central reinforcing piece (1) and the oxygen-isolating flame-retardant layer;
and the sheath (9) is coated outside the oxygen-isolating flame-retardant layer.
2. The high-flame-retardant communication optical cable for rail transit as claimed in claim 1, wherein a longitudinal embossing steel-plastic composite belt (8) is further arranged between the second ceramization fire-resistant composite belt (7) and the sheath (9).
3. The optical communication cable for rail transit use according to claim 2, wherein the first ceramization fire-resistant composite tape (4) is wrapped outside the cable core unit (2) and the central strength member (1) as a whole, and an overlapping area of the wrapped first ceramization fire-resistant composite tape (4) accounts for more than 20% of a total area.
4. The optical communication cable for rail transit use according to claim 3, wherein two water-blocking yarns are further cross-wound outside the first ceramic fire-resistant composite tape (4).
5. The high-flame-retardant communication optical cable for rail transit according to claim 4, wherein the longitudinal embossing aluminum-plastic composite tape (5) is wrapped on the outer side of the first ceramic fire-resistant composite tape (4), and a lap joint is filled with a flame-retardant coating ointment.
6. The optical communication cable for rail transit use according to claim 5, wherein the gap between the longitudinal embossing aluminum-plastic composite tape (5) and the whole of the cable core unit (2) and the central reinforcing member (1) is 0.6-0.8 mm.
7. The optical communication cable for rail transit use according to claim 6, wherein two water-blocking yarns are cross-wound outside the second ceramic fire-resistant composite tape (7).
8. The high-flame-retardant communication optical cable for rail transit according to any one of claims 2 to 7, wherein the longitudinally-wrapped embossed steel-plastic composite tape (8) is wrapped on the outer side of the second ceramic fire-resistant composite tape (7), the width of an edge lap is larger than 6mm, and the lap joint is filled with flame-retardant coating ointment.
9. The high-flame-retardant communication optical cable for rail transit according to any one of claims 2 to 7, wherein two water-blocking yarns are further crossly wound outside the longitudinally-wrapped embossed steel-plastic composite tape (8).
10. A highly flame retardant optical communication cable for rail transit according to any of claims 1 to 7, characterized in that the material of said sheath (9) is a low heat release halogen free low smoke flame retardant polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921629235.1U CN210982829U (en) | 2019-09-27 | 2019-09-27 | High flame-retardant communication optical cable for rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921629235.1U CN210982829U (en) | 2019-09-27 | 2019-09-27 | High flame-retardant communication optical cable for rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210982829U true CN210982829U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921629235.1U Active CN210982829U (en) | 2019-09-27 | 2019-09-27 | High flame-retardant communication optical cable for rail transit |
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| Country | Link |
|---|---|
| CN (1) | CN210982829U (en) |
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- 2019-09-27 CN CN201921629235.1U patent/CN210982829U/en active Active
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