CN214704110U - Flame-retardant fireproof communication optical cable - Google Patents
Flame-retardant fireproof communication optical cable Download PDFInfo
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- CN214704110U CN214704110U CN202120211421.4U CN202120211421U CN214704110U CN 214704110 U CN214704110 U CN 214704110U CN 202120211421 U CN202120211421 U CN 202120211421U CN 214704110 U CN214704110 U CN 214704110U
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Abstract
The utility model provides a fire-retardant fire prevention type communication optical cable. Specifically, the flame-retardant fireproof communication optical cable comprises a cable core and a protective layer positioned outside the cable core; wherein the cable core comprises at least one strength member and one or more loose tubes stranded around the strength member; each loose tube comprises a PBT tube, a second fireproof layer and an optical fiber, wherein the second fireproof layer is coated outside the PBT tube, the optical fiber is arranged inside the PBT tube, and the outer surface of the optical fiber is coated with the first fireproof layer; the protective layer outside the cable core sequentially comprises a third fireproof layer, a heat insulation layer, a metal shielding layer, an inner liner, a fourth fireproof layer and an outer sheath from inside to outside. The utility model discloses a multiple fire prevention design makes the optical cable have that coefficient of heat conductivity is low, temperature resistant fire behavior is strong, antifriction, corrosion-resistant, intensity is high and characteristics such as fail safe nature height.
Description
Technical Field
The application belongs to the technical field of communication optical cables, and particularly relates to a flame-retardant fireproof communication optical cable.
Background
A Communication Optical Fiber Cable (Communication Optical Fiber Cable) is composed of a Cable core composed of several (core) Optical fibers (generally from several cores to several thousand cores) and an outer protective layer. Compared with the traditional symmetrical copper loop and coaxial copper loop, the transmission capacity of the optical fiber is much larger; the attenuation is less; the transmission distance is long; the volume is small; the weight is light; low cost and is currently the most promising communication transmission medium.
Optical fiber cables are increasingly used as transmission optical fiber communication, monitoring and control systems in relatively closed space occasions such as railway tunnels, subways, rail transit, high-rise buildings, oil depots, mines and the like.
In the optical fiber cable in the prior art, due to poor flame-retardant and fireproof performance, once a fire disaster occurs, the optical cable can be burnt and damaged quickly, so that an optical fiber cable transmission system fails, great difficulty is brought to disaster relief work, and larger damage and loss are caused.
SUMMERY OF THE UTILITY MODEL
For the above-mentioned not enough that solve prior art and exist, the utility model aims to provide a fire-retardant fire prevention type communication optical cable through multiple fire prevention design, makes optical cable coefficient of heat conductivity low, temperature resistant fire behavior strong, antifriction, corrosion-resistant and intensity high.
Specifically, the utility model provides a fire-retardant fire prevention type communication optical cable, include:
the cable comprises a cable core and a protective layer positioned outside the cable core;
wherein the cable core comprises at least one strength member and one or more loose tubes stranded around the strength member; preferably, the reinforcing member is one, the number of the loose tubes is several, and more preferably, the number of the loose tubes is four;
each loose tube comprises a PBT tube, a second fireproof layer and an optical fiber, wherein the second fireproof layer is coated outside the PBT tube, the optical fiber is arranged inside the PBT tube, and the outer surface of the optical fiber is coated with the first fireproof layer;
the protective layer positioned outside the cable core sequentially comprises a third fireproof layer, a heat insulation layer, a metal shielding layer, an inner liner, a fourth fireproof layer and an outer sheath from inside to outside.
Further preferably, the flame-retardant and fireproof type communication optical cable is characterized in that one or more optical fibers are arranged inside the PBT sleeve, the gaps among the optical fibers are tightly filled with water-blocking cable paste, and more preferably, four optical fibers are arranged inside each PBT sleeve.
Further preferably, the flame-retardant and fire-proof communication optical cable is characterized in that the one or more loose tubes stranded around the strength members are externally fastened by winding a binding yarn.
Further, fire-retardant fire prevention type communication optical cable, wherein, first flame retardant coating is inorganic fire resistant coating, more preferably, first flame retardant coating principal ingredients are metal nitride and phosphoric acid, and this flame retardant coating can bear 2000 ℃, makes cable whole flame retardant property good, and factor of safety is high.
Further preferably, the second fireproof layer is a mineral wool pipe, the mineral wool pipe is made of mineral fiber wool, and the fireproof flame-retardant pipe has the advantages of light weight, high melting point, no combustion even at high temperature and good fireproof effect.
Further preferably, the third flame-proof layer is a carbon fiber reinforced epoxy resin composite belt, and preferably, the thickness of the third flame-proof layer is not less than 0.2 mm.
Further preferably, the fourth fireproof layer is made of glass fiber tapes, more preferably, the fourth fireproof layer is formed by double-layer wrapping of glass fiber tapes with the thickness of 0.02-0.05 mm, and the overlapping rate of each layer is more than or equal to 30%.
Further preferably, the metal shielding layer is a copper strip welding embossing shielding layer, and more preferably, the thickness of the copper strip is not less than 0.2 mm.
Preferably, the thickness of the heat insulation layer is not less than 1.0 mm.
Further preferably, the heat insulation layer, the inner lining layer and the outer sheath are all high-flame-retardant cross-linked chlorinated mixture sheaths.
In another more preferred embodiment of the present invention, the flame-retardant and fire-resistant type optical communication cable, wherein the number of the reinforcing members is 1, and the number of the loose tubes twisted around the reinforcing members is 4.
Further, the flame-retardant and fireproof communication optical cable of the present invention, wherein the loose tube is prepared by the following method: the surface of the optical fiber is coated with a layer of inorganic fireproof coating by adopting a coating process, the optical fiber and the water-blocking cable paste are arranged in the PBT sleeve by adopting a plastic sheathing process, and the PBT sleeve is coated with a layer of mineral wool pipe as a second fireproof layer.
Preferably, the cable core is prepared by the following method: and twisting the reinforcing piece and the loose tube by adopting a cabling process, and fastening the twisted loose tube by adopting a binding yarn to prepare a cable core.
Preferably, the flame-retardant and fire-proof communication optical cable is prepared by the following method: coating a carbon fiber reinforced epoxy resin composite belt outside the cable core to obtain a third flame-proof layer; preferably, the thickness of the carbon fiber reinforced epoxy resin composite tape is not less than 0.2 mm;
a thermal insulation layer is coated outside the third fire prevention layer by adopting an extrusion molding cross-linking process, and a metal shielding layer is coated outside the thermal insulation layer by adopting a copper strip through a welding embossing process; preferably, the thickness of the heat insulation layer is not less than 1.0 mm; the thickness of the metal shielding layer is not less than 0.2 mm;
coating a lining layer outside the metal shielding layer by adopting an extrusion molding crosslinking process, wherein the thickness of the lining layer is preferably not less than 1.2 mm;
coating the glass fiber tape outside the lining layer by adopting a double-layer wrapping process, wherein the covering rate of each layer is more than or equal to 30 percent, and preparing a fourth fireproof layer, wherein the thickness of the glass fiber tape is preferably 0.02-0.05 mm;
and finally, coating a high-flame-retardant cross-linking type chlorinated mixture sheath outside the fourth fireproof layer to obtain the flame-retardant chlorinated mixture.
The utility model has the advantages that:
first, the fire-retardant fire prevention type communication optical cable that this application provided to adopt the outer cladding second flame retardant coating of PBT sleeve pipe, inside optic fibre surface coating first flame retardant coating plays and insulates against heat and fire protection to inside optic fibre.
Secondly, the flame-retardant fireproof communication optical cable comprises four fireproof layers, and the optical cable has the advantages of low heat conduction coefficient and high temperature and fire resistance through multiple fireproof designs;
particularly, the first fireproof layer adopts fireproof paint, so that the cable has good overall flame retardant property and high safety factor; the second fireproof layer adopts mineral wool pipes, and has the advantages of light weight, high melting point, no combustion even at high temperature and good flame-retardant and fireproof effects; the third fireproof layer adopts a carbon fiber reinforced epoxy resin composite belt, and the double fireproof layers have the characteristics of high fire resistance and high temperature resistance, light specific gravity, high strength and small thermal expansion coefficient, and simultaneously have the performances of corrosion resistance, fatigue resistance and the like; the fourth fireproof layer adopts a glass fiber belt, and has the advantages of non-inflammability, corrosion resistance, high temperature resistance, small moisture absorption and the like.
Third, insulating layer, metallic shield layer, inner liner and the oversheath layer that this application set up make the cable have superior shielding property, mechanical strength is high, sturdy and durable, and the optical cable can stand violent mechanical damage, and shock resistance is good with the anti-vibration performance, simultaneously, has still ensured that the optical cable has functions such as superior temperature resistant, dampproofing, resistance to compression, prevent that the animal tooth stings, and communication transmission is effectual, and fail safe nature is high.
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 structural view of a flame retardant and fire resistant communications cable provided herein;
the reference numbers in the figures are:
1. an optical fiber;
2. a first fire resistant layer;
3. water-blocking cable paste;
4. a PBT sleeve;
5. a second fire-resistant layer;
6. loosening the sleeve;
7. a reinforcement;
8. binding a yarn winding layer;
9. a third fire prevention layer;
10. a thermal insulation layer;
11. a metal shielding layer;
12. an inner liner layer;
13. a fourth fire resistant layer;
14. an outer sheath.
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.
Examples
The present embodiment provides a flame-retardant and fire-proof communication optical cable, as shown in fig. 1, including: the cable comprises a cable core and a protective layer positioned outside the cable core;
the cable core comprises at least one reinforcing member 7 and loose tubes 6 which are twisted around the reinforcing member 7, wherein the number of the loose tubes 6 which are twisted around the reinforcing member 7 is evenly distributed with 4 in the embodiment, the number of the loose tubes can be increased or decreased according to actual needs, but at least can not be less than 1; the outsides of the 4 twisted loose tubes 6 are fastened by adopting a binding yarn winding layer 8;
each loose tube comprises a PBT tube 4, a second fireproof layer 5 coated outside the PBT tube 4, and optical fibers 1 arranged in the PBT tube, wherein the number of the optical fibers can be 1 or more, 4 optical fibers are arranged in each PBT tube in the embodiment, and a first fireproof layer 2 is arranged on the outer surface of each optical fiber 1; the water-blocking cable paste 3 is tightly filled in the optical fiber gap arranged in the PBT sleeve;
the protective layer positioned outside the cable core sequentially comprises a third fireproof layer 9, a heat insulation layer 10, a metal shielding layer 11, an inner liner layer 12, a fourth fireproof layer 13 and an outer sheath layer 14 from inside to outside.
The first fireproof layer is made of inorganic fireproof paint and is coated on the outer surface of the optical fiber. Specifically, the first fireproof layer takes metal nitride and phosphoric acid as main components, and the fireproof coating can resist 2000 ℃ so that the cable is good in overall flame retardant property and high in safety coefficient.
The second fireproof layer is an ore wool pipe. The fireproof heat-insulating material is prepared from mineral fiber cotton serving as a raw material, has light weight and high melting point, cannot burn at high temperature, and has good flame-retardant and fireproof effects.
The third fire prevention layer is a carbon fiber reinforced epoxy resin composite belt, the thickness of the third fire prevention layer is not less than 0.2mm, and the double-layer fire prevention layer has the characteristics of high fire resistance and high temperature resistance, light specific gravity, high strength and small thermal expansion coefficient, and simultaneously has the performances of corrosion resistance, fatigue resistance and the like.
The fourth fireproof layer is a glass fiber band. Specifically, the fourth fireproof layer is formed by double-layer wrapping of glass fiber tapes with the thickness of 0.02-0.05 mm, and the covering rate of each layer is more than or equal to 30%. It has the advantages of non-combustion, corrosion resistance, high temperature resistance, small moisture absorption, etc.
The heat insulation layer, the inner liner layer and the outer sheath layer are all high-flame-retardant cross-linked chlorinated mixture sheaths. The cable has excellent high temperature resistance, fatigue resistance, wear resistance, irradiation resistance, corrosion resistance, flame retardance and chemical stability, and can prolong the service life of the cable.
The metal shielding layer is a copper strip welding embossing shielding layer, and the copper strip welding embossing shielding layer has no gap, does not generate electromagnetic leakage and has good shielding effect; in addition, the copper strip welding embossing shielding layer is firm and not easy to deform, and the optical cable has high tensile strength and bending performance.
When the optical cable is manufactured, the surface of the optical fiber is coated with a layer of inorganic fireproof coating by adopting a coating process, a plurality of optical fibers and water-blocking cable paste are arranged in the PBT sleeve by adopting a plastic sheathing process, and the PBT sleeve is coated with a layer of mineral wool tube to finish the manufacturing of the loose sleeve.
Then, stranding the reinforcing part and the plurality of loose tubes prepared in advance by adopting a cabling process, fastening the stranded plurality of loose tubes by adopting binding yarns to manufacture a cable core, and coating a layer of carbon fiber reinforced epoxy resin composite belt with the thickness not less than 0.2mm outside the cable core to manufacture a third fire prevention layer; a thermal insulation layer with the thickness not less than 1.0mm is coated outside the third fire prevention layer by adopting an extrusion molding cross-linking process, and a metal shielding layer is coated outside the thermal insulation layer by adopting a copper strip with the thickness not less than 0.2mm through a welding embossing process; then an extrusion molding cross-linking process is adopted to coat a layer of lining layer with the thickness not less than 1.2mm outside the metal shielding layer; covering a glass fiber tape with the thickness of 0.02-0.05 mm outside the lining layer by adopting a double-layer wrapping process, wherein the covering rate of each layer is more than or equal to 30 percent, and preparing a fourth fireproof layer; at last, a layer of high flame-retardant cross-linking type chlorinated mixture sheath is coated outside the fourth fireproof layer, namely, the flame-retardant fireproof communication optical cable is manufactured.
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 flame-retardant and fire-resistant communication optical cable, comprising:
the cable comprises a cable core and a protective layer positioned outside the cable core;
wherein the cable core comprises at least one strength member and one or more loose tubes stranded around the strength member;
each loose tube comprises a PBT tube, a second fireproof layer and an optical fiber, wherein the second fireproof layer is coated outside the PBT tube, the optical fiber is arranged inside the PBT tube, and the outer surface of the optical fiber is coated with the first fireproof layer;
the protective layer positioned outside the cable core sequentially comprises a third fireproof layer, a heat insulation layer, a metal shielding layer, an inner liner, a fourth fireproof layer and an outer sheath from inside to outside.
2. The flame-retardant and fire-resistant type optical communication cable according to claim 1, wherein one or more optical fibers are arranged inside the PBT sleeve, and gaps among the optical fibers are filled with water-blocking cable paste.
3. The flame retardant and fire resistant optical communication cable according to claim 1, wherein the one or more loose tubes stranded around the strength members are externally secured with a binder wrap.
4. The flame retardant and fire resistant communications cable according to claim 1, wherein the first fire resistant coating is an inorganic fire resistant coating.
5. The flame retardant and fire resistant communications cable according to claim 1, wherein the second fire resistant layer is a mineral wool tube.
6. The flame-retardant and fire-proof communication optical cable according to claim 1, wherein the third fire-proof layer is a carbon fiber reinforced epoxy resin composite tape with a thickness of not less than 0.2 mm.
7. The flame-retardant and fireproof communication optical cable according to claim 1, wherein the fourth fireproof layer is a glass fiber tape, and the thickness of the glass fiber tape is 0.02-0.05 mm.
8. The flame-retardant and fire-resistant type optical communication cable according to claim 1, wherein the heat-insulating layer, the inner liner and the outer sheath are high-flame-retardant cross-linked chlorinated mixture sheaths.
9. The flame-retardant and fire-resistant type optical communication cable according to claim 1, wherein the metal shielding layer is a copper tape welded corrugated shielding layer, and the thickness is not less than 0.2 mm.
10. The flame-retardant and flame-retardant communication optical cable according to claim 1, wherein the thickness of the thermal insulation layer is not less than 1.0 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211421.4U CN214704110U (en) | 2021-01-26 | 2021-01-26 | Flame-retardant fireproof communication optical cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211421.4U CN214704110U (en) | 2021-01-26 | 2021-01-26 | Flame-retardant fireproof communication optical cable |
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| CN214704110U true CN214704110U (en) | 2021-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799190A (en) * | 2021-01-26 | 2021-05-14 | 江苏通鼎光电科技有限公司 | Flame-retardant fireproof communication optical cable and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799190A (en) * | 2021-01-26 | 2021-05-14 | 江苏通鼎光电科技有限公司 | Flame-retardant fireproof communication optical cable and preparation method thereof |
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