AU2019100250A4 - Optical Fiber Composite Fireproof Cable and Intelligent Early Warning Communication Device - Google Patents

Optical Fiber Composite Fireproof Cable and Intelligent Early Warning Communication Device Download PDF

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AU2019100250A4
AU2019100250A4 AU2019100250A AU2019100250A AU2019100250A4 AU 2019100250 A4 AU2019100250 A4 AU 2019100250A4 AU 2019100250 A AU2019100250 A AU 2019100250A AU 2019100250 A AU2019100250 A AU 2019100250A AU 2019100250 A4 AU2019100250 A4 AU 2019100250A4
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layer
early warning
optical
communication
optical unit
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AU2019100250A
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Haifeng Liu
Hongguang Ren
Yuping Wan
Jianping Zheng
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Jiangsu Hengtong Power Cable Co Ltd
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Jiangsu Hengtong Power Cable Co Ltd
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Assigned to JIANGSU HENGTONG POWER CABLE CO., LTD. reassignment JIANGSU HENGTONG POWER CABLE CO., LTD. Amend patent request/document other than specification (104) Assignors: JIANGSU HENGTONG POWER CABLE CO., LTD
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/22—Cables including at least one electrical conductor together with optical fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/24—Devices affording localised protection against mechanical force or pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

Abstract Provided is an optical fiber composite fireproof cable and an intelligent early warning communication device, relating to the technical field of optical communication transmission, this cable, while being capable of optical communication and having good performance of high temperature resistance and flame retardance, can work with an early warning system or monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue. It includes an optical unit for communication, an optical unit for early warning and at least three power transmission units, the optical unit for communication, the optical unit for early warning and the power transmission units are stranded to form a cable core; the optical unit for communication consists of a loose bushing, a plurality of optical fibers for communication located within the loose bushing and a polyolefin sheathing layer extruded around the external surface of the loose bushing, the optical unit for early warning includes a plurality of optical fibers for temperature measurement, a spiral steel pipe, a Kevlar fiber reinforced layer, a stainless steel braid layer and a Teflon sheathing layer, the power transmission unit includes a copper conductor, a mica tape layer coating the external surface of the copper conductor and a polyolefin insulating layer; an infill is provided between the fiberglass wrapping tape layer and the cable core. Drawings: 701 @ 2 Fig.1 Fig.2

Description

Optical Fiber Composite Fireproof Cable and Intelligent Early Warning Communication Device
Cross Reference to Related Applications
The present application claims the priority to the Chinese Patent Application No. 201821840833.9, entitled “Fireproof Low-voltage Cable for Intelligent Early Warning Communication”, filed with CNIPA on November 9, 2018, the entirety of which is incorporated herein by reference.
Technical Field
The present disclosure relates to the technical field of optical communication transmission and particularly to an optical fiber composite fireproof cable and an intelligent early warning communication device.
Background Art
With the rapid development of the social economy in China, important engineering facilities, e.g. large buildings, metros, tunnels and nuclear power plants, and densely populated places, e.g. large supermarkets and convention centers, have an increasing popularity. At the meantime, the idea of fire safety has become a major concern to people, therefore, the requirements for the flame resistance and fireproofing of wires and cables are higher and higher, accordingly, the fireproof performance of wires and cables has got extreme attention.
The fireproof cables in the market, upon continuous development, obtain gradually increased fire protection ability of wires and cables, but most of the wires and cables in the prior art just provide passive fire protection, which means that in case of a fire, wires and cables with a relatively stronger fire protection ability can keep supplying power for a certain period of time, but not fail in the first place. However, none of the wires and cables in the prior art can work with devices of, e.g., early warning or monitoring of fire protection, or the like, to make prediction or detection at the beginning of a fire, and thus to effectively avoid occurrence or aggravation of a fire.
Optical fiber composite low-voltage cable is capable of electric energy transmission and optical communication, and can work in cooperation with an early warning system or monitoring device of fire protection, to give an early warning function of a fire, but such optical fiber composite low-voltage cable is poor in fireproof performance, and it is hard for an optical fiber composite low-voltage cable to maintain a normal optical fiber communication after a fire occurs.
Summary
The purpose of the present disclosure is to provide an optical fiber composite fireproof cable and an intelligent early warning communication
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2019100250 08 Mar 2019 device, this cable, while being capable of optical communication and having good performance of high temperature resistance and flame retardance, can work with an early warning system or monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out, to reserve time for escape and rescue.
To achieve the above purpose, the first aspect of the embodiments of the present disclosure, provides an optical fiber composite fireproof cable, which includes an optical unit for communication, an optical unit for early warning, and at least three (electric) power transmission units, the optical unit for communication, the optical unit for early warning and the power transmission units are stranded to form a cable core; the optical unit for communication consists of a loose bushing and a plurality of optical fibers for communication located within the loose bushing, and a polyolefin sheathing layer extruded around the external surface of the loose bushing, the optical unit for early warning includes a plurality of optical fibers for temperature measurement, a spiral steel pipe, a Kevlar fiber reinforced layer, a stainless steel braid layer and a Teflon sheathing layer, the optical fibers for temperature measurement are placed inside the spiral steel pipe, the Kevlar fiber reinforced layer, the stainless steel braid layer and the Teflon sheathing layer coat the external surface of the spiral steel pipe from inside to outside, power transmission units include a copper conductor, a mica tape layer coating the external surface of the copper conductor, and a polyolefin insulating layer, the polyolefin insulating layer coats the external surface of the mica tape layer; a fiberglass wrapping tape wraps around the external surface of the cable core and thus forms a fiberglass wrapping tape layer, an infill is provided between the fiberglass wrapping tape layer and the cable core, a polyolefin fire-resistant layer coats the external surface of the fiberglass wrapping tape layer, an external sheath is extruded around the external surface of the polyolefin fire-resistant layer.
In combination with the first aspect, the embodiments of the present disclosure provide a second possible implementation of the first aspect, where the copper conductor has a stranded structure. In combination with the first aspect, the embodiments of the present disclosure provide a second possible implementation of a third aspect, where the copper conductor is a type 2 annealed copper conductor.
In combination with the first aspect, the embodiments of the present disclosure provide a fourth possible implementation of the first aspect, where the optical fibers for temperature measurement are multimode optical fibers.
In combination with the first aspect, the embodiments of the present disclosure provide a fifth possible implementation of the first aspect, where the optical fibers for temperature measurement are of class A1a.
In combination with the first aspect, the embodiments of the present disclosure provide a sixth possible implementation of the first aspect, where the polyolefin sheathing layer is a ceramic polyolefin sheathing layer.
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In combination with the first aspect, the embodiments of the present disclosure provide a seventh possible implementation of the first aspect, where the polyolefin insulating layer is a ceramic polyolefin insulating layer.
In combination with the first aspect, the embodiments of the present disclosure provide an eighth possible implementation of the first aspect, where the infill is an alkali-free fiberglass yarn infill.
In combination with the first aspect, the embodiments of the present disclosure provide a ninth possible implementation of the first aspect, where the external sheath is a thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath.
In combination with the first aspect, the embodiments of the present disclosure provide a tenth possible implementation of the first aspect, where the external sheath is provided with a protrusion on its internal surface, the polyolefin fire-resistant layer is accordingly provided with a recess on its external surface, and the protrusion fits into the recess.
In combination with the first aspect, the embodiments of the present disclosure provide an eleventh possible implementation of the first aspect, where a plurality of protrusions are provided, and the plurality of protrusions are arranged circumferentially along the internal surface of the external sheath; accordingly, a plurality of recesses are provided, and the plurality of recesses provided have the same number as the plurality of protrusions (701) provided.
In combination with the first aspect, the embodiments of the present disclosure provide a twelfth possible implementation of the first aspect, where the protrusions have a semicircular shaped cross section, and the recesses have a semicircular shaped cross section.
The second aspect of the embodiments of the present disclosure provides an intelligent early warning communication device, which includes an early warning system or monitoring device of fire protection, and the optical fiber composite fireproof cable of any one described above, the optical fiber composite fireproof cable is configured to transmit the early warning information and real-time monitoring information sent from the early warning system or monitoring device of fire protection.
In combination with the second aspect, the embodiments of the present disclosure provide a second possible implementation of the second aspect, where the optical fiber composite fireproof cable is an optical (cable) fiber composite fireproof cable with a rated voltage of 0.6/1 kV.
By applying the above technical solutions, the embodiments of the present disclosure at least bring the following beneficial effects.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, the optical unit for communication employs a loose bushing structure, and has a ceramic polyolefin sheathing layer extruded
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2019100250 08 Mar 2019 around its external surface, once being burnt by flame, the polyolefin sheathing layer crusts, absorbs heat and prevents flame from burning inward. In addition, outside of the copper conductor is wrapped with a mica tape layer with good high temperature resistance and flame retardance. A double-layer fire-resistant structure of fiberglass wrapping tape layer and polyolefin fire-resistant layer is further provided outside the cable core. The external sheath is a low-smoke halogen-free flame-retardant polyolefin sheath. In addition, a fire-resistant alkali-free fiberglass yarn is provided between the fiberglass wrapping tape layer and the cable core as an infill. Both the entire cable and portion of the optical unit for communication have good flame retardance and fire resistance. The optical attenuation is relatively small even under high-temperature burning, and it is possible to maintain a normal optical fiber communication even in case of a fire.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, its optical unit for early warning employs class A1a multimode optical fibers with a high temperature resistance, and outside is wrapped by a spiral steel pipe, a Kevlar fiber reinforced layer, a stainless steel braid layer and a Teflon sheathing layer. Such optical unit for early warning, with a compact structure and a high compressive and shear strength, can well protect the optical fibers for temperature measurement. In addition, with good heat resistance, it may be used under a temperature reaching a range from -60°C to 150°C for a long time, and the highest using temperature can reach 200°C. In addition, the rapid heat conduction of Teflon of the external sheath can ensure the sensitivity of the composite cable to an early fire warning. Under normal working condition, a composite cable employing such optical unit for early warning can be monitored for temperature along the entire length of the composite cable by working with an early warning system or monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, its external sheath on its internal surface has several protrusions circumferentially there along, which fit into the recesses on the polyolefin fire-resistant layer, this improves the bonding strength and stability between the external sheath and the polyolefin fire-resistant layer, avoids separation of layers or axial offsets between cable layers upon cutting, wrapping or dragging during use, and greatly improves the service life and structural reliability of the cable. Therefore, such cable is worth practicing and popularizing.
The other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be deduced or unambiguously determined from the description or known by practicing the above technologies of the present disclosure.
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To make the above object, features and advantages of the present disclosure more apparent and understandable, preferred embodiments are provided and detailed below with reference to the accompanied drawings.
Brief Description of Drawings
In order to more clearly explain the technical solutions in the embodiments of the present disclosure or in the prior art, figures to be used in the embodiments or in the description of the prior art will be briefly described. Obviously, the figures in the following description merely show some of the embodiments of the present disclosure. Other figures may be obtained by those ordinarily skilled in the art based on these figures without paying creative efforts.
Fig. 1 is a structural schematic diagram of an optical fiber composite fireproof cable of the embodiments of the present disclosure;
Fig. 2 is a partial structural schematic diagram of the optical unit for communication in the optical fiber composite fireproof cable of the embodiments of the present disclosure;
Fig. 3 is a partial structural schematic diagram of the optical unit for early warning in the optical fiber composite fireproof cable of the embodiments of the present disclosure.
Reference signs: 1. Optical unit for communication; 101. Loose bushing; 102. Optical fibers for communication; 103. Polyolefin sheathing layer; 2. Optical unit for early warning; 201. Optical fibers for temperature measurement; 202. Spiral steel pipe; 203. Kevlar fiber reinforced layer; 204. Stainless steel braid layer; 205. Teflon sheathing layer; 3. Power transmission unit; 301. Copper conductor; 302. Mica tape layer; 303. Polyolefin insulating layer; 4. Fiberglass wrapping tape layer; 5. Infill; 6. Polyolefin fire-resistant layer; 601. Recess; 7. External sheath; 701. Protrusions.
Detailed Description of Embodiments
The following detailed description of the embodiments of the present disclosure provided in the figures is not intended to limit the scope of the disclosure as claimed, but merely shows the selected embodiments of the present disclosure. All the other embodiments obtained by those ordinarily skilled in the art based on the embodiments provided in the present disclosure without paying creative efforts shall fall within the scope of protection of the present disclosure.
In the description of the present specification, such description as reference terms “an embodiment”, “some embodiments”, “specific example” or “some examples” and “for example” means that the specific features, structures, materials or characteristics described with reference to such embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. In the present specification, schematic expressions of the above terms do not necessarily refer to the same embodiment or example. And the
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2019100250 08 Mar 2019 specific features, structures, materials or characteristics as described may be combined in any appropriate way in any one or more embodiments or examples.
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and comprehensively described with reference to the figures. Apparently, the embodiments as described are merely some, but not all of the embodiments of the present disclosure. All the other embodiments obtained by those ordinarily skilled in the art based on the embodiments provided in the present disclosure without paying creative efforts shall fall within the scope of protection of the present disclosure. Normally, the components of the embodiments of the present disclosure described and illustrated in the figures herein can be arranged and designed in various configurations.
Embodiment 1:
The present embodiment provides an optical fiber composite fireproof cable which, as shown in Fig. 1, includes an optical unit for communication 1, an optical unit for early warning 2 and three power transmission units 3. The optical unit for communication 1, the optical unit for early warning 2 and the power transmission units 3 are stranded to form a cable core.
The optical unit for communication 1 includes a loose bushing 101, a plurality of optical fibers for communication 102 located within the loose bushing 101 and a polyolefin sheathing layer 103 extruded around the external surface of the loose bushing 101. The optical unit for early warning 2 includes a plurality of optical fibers for temperature measurement 201, a spiral steel pipe 202, a Kevlar fiber reinforced layer 203, a stainless steel braid layer 204 and a Teflon sheathing layer 205. The optical fibers for temperature measurement 201 are placed inside the spiral steel pipe 202. The Kevlar fiber reinforced layer 203, the stainless steel braid layer 204 and the Teflon sheathing layer 205 coat the external surface of the spiral steel pipe 202 from inside to outside. The power transmission unit 3 includes a copper conductor 301, a mica tape layer 302 coating the external surface of the copper conductor 301 and a polyolefin insulating layer 303. The polyolefin insulating layer 303 coats the external surface of the mica tape layer 302.
A fiberglass wrapping tape wraps around the external surface of the cable core and thus forms a fiberglass wrapping tape layer 4. An infill 5 is provided between the fiberglass wrapping tape layer 4 and the cable core. A polyolefin fire-resistant layer 6 coats the external surface of the fiberglass wrapping tape layer 4. An external sheath 7 is extruded around the external surface of the polyolefin fire-resistant layer 6.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, the optical unit for communication 1 employs a loose bushing 101 structure and has a ceramic polyolefin sheathing layer 103
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2019100250 08 Mar 2019 extruded around its external surface. Once being burnt by flame, the polyolefin sheathing layer 103 crusts, absorbs heat and prevents flame from burning inward. In addition, outside of the copper conductor 301 is wrapped with a mica tape layer 302 with good high temperature resistance and flame retardance. A double-layer fire-resistant structure of fiberglass wrapping tape layer 4 and polyolefin fire-resistant layer 6 is further provided outside the cable core. The external sheath 7 is a low-smoke halogen-free flame-retardant polyolefin sheath. In addition, a fire-resistant alkali-free fiberglass yarn is provided between the fiberglass wrapping tape layer 4 and the cable core as an infill. Both the entire cable and portion of the optical unit for communication 1 have good flame retardance and fire resistance. The optical attenuation is relatively small even under high-temperature burning. And it is possible to maintain a normal optical fiber communication even in case of a fire.
On such basis, as shown in Fig. 1, in the optical fiber composite fireproof cable of the embodiments of the present disclosure, the copper conductor 301 has a stranded structure.
On such basis, the copper conductor 301 is a type 2 annealed copper conductor, in which case it may be manufactured to have a standard stranded structure.
On such basis, the optical fibers for temperature measurement 201 are multimode optical fibers.
On such basis, the optical fibers for temperature measurement 201 are of class A1a.
On such basis, the polyolefin sheathing layer 103 is a ceramic polyolefin sheathing layer.
On such basis, the polyolefin insulating layer 303 is a ceramic polyolefin insulating layer.
On such basis, as shown in Fig. 1, the infill 5 is an alkali-free fiberglass yarn infill.
The alkali-free fiberglass yarn has a good fire resistance. Therefore, the flame retardance and fire resistance of the cable core may be further improved by using the alkali-free fiberglass yarn as the infill.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, the optical unit for early warning 2 employs class A1a multimode optical fibers with a high temperature resistance, and outside is wrapped by a spiral steel pipe 202, a Kevlar fiber reinforced layer 203, a stainless steel braid layer 204 and a Teflon sheathing layer 205. The optical unit for early warning 2, with a compact structure and a high compressive and shear strength, can well protect the optical fibers for temperature measurement 201. In addition, with good heat resistance, it may be used under a temperature reaching a range from -60°C to 150°C for a long time.
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The highest using temperature can reach 200°C. In addition, the rapid heat conduction of Teflon of the external sheath 7 can ensure the sensitivity of the composite cable to an early fire warning. Under normal working condition, a composite cable employing such optical unit for early warning 2 can be monitored for temperature along the entire length of the composite cable by working with an early warning system or monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue.
Embodiment 2:
The embodiment of the present disclosure provides an optical fiber composite fireproof cable which, as shown in Fig. 1, includes an optical unit for communication 1, an optical unit for early warning 2 and three power transmission units 3. The optical unit for communication 1, the optical unit for early warning 2 and the power transmission units 3 are stranded to form a cable core.
The optical unit for communication 1 includes a loose bushing 101, a plurality of optical fibers for communication 102 located within the loose bushing 101 and a polyolefin sheathing layer 103 extruded around the external surface of the loose bushing 101. The optical unit for early warning 2 includes a plurality of optical fibers for temperature measurement 201, a spiral steel pipe 202, a Kevlar fiber reinforced layer 203, a stainless steel braid layer 204 and a Teflon sheathing layer 205. The optical fibers for temperature measurement 201 are placed inside the spiral steel pipe 202. The Kevlar fiber reinforced layer 203, the stainless steel braid layer 204 and the Teflon sheathing layer 205 coat the external surface of the spiral steel pipe 202 from inside to outside. The power transmission units 3 includes a copper conductor 301, a mica tape layer 302 coating the external surface of the copper conductor 301 and a polyolefin insulating layer 303. The polyolefin insulating layer 303 coats the external surface of the mica tape layer 302.
A fiberglass wrapping tape wraps around the external surface of the cable core and thus forms a fiberglass wrapping tape layer 4. An infill 5 is provided between the fiberglass wrapping tape layer 4 and the cable core. A polyolefin fire-resistant layer 6 coats the external surface of the fiberglass wrapping tape layer 4. An external sheath 7 is extruded around the external surface of the polyolefin fire-resistant layer 6.
On such basis, as shown in Fig. 1, the external sheath 7 is a thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath.
On such basis, the external sheath 7 is provided with a protrusion 701 on its internal surface, the polyolefin fire-resistant layer 6 is accordingly provided with a recess 601 on its external surface, and the protrusion 701 fits into the recess 601.
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In this way, the connection stability can be improved between the external sheath 7 and the polyolefin fire-resistant layer 6, avoiding displacement or slippage between the two of them.
On such basis, a plurality of protrusions 701 are provided, and the plurality of protrusions 701 are arranged circumferentially along the internal surface of the external sheath 7. Accordingly, a plurality of recesses 601 are provided. The plurality of recesses 601 provided have the same number as the plurality of protrusions 701 provided.
Exemplarily, as shown in Fig. 1, the external sheath 7 has eight protrusions 701 along the circumference of the internal surface. Such protrusions 701 fit into the recesses 601 of the polyolefin fire-resistant layer 6, so that a stable connection can be maintained between the external sheath 7 and the polyolefin fire-resistant layer 6 under the action of external force, e.g. beat and shock.
Optionally, the protrusions 701 have a semicircular shaped cross section and the recesses 601 have a semicircular shaped cross section. The protrusions 701 and the recesses 601 have cross sections of matching shapes, and the matching surfaces between the two is a cambered (curved) surface, so that the two will be matched with each other in a more tight and stable way.
Regarding to the optical fiber composite fireproof cable of the embodiments of the present disclosure, the external sheath 7 on its internal surface has several protrusions 701 circumferentially there along, the protrusions 701 fit into the recesses 601 on the polyolefin fire-resistant layer 6. This improves the bonding strength and stability between the external sheath 7 and the polyolefin fire-resistant layer 6, avoids separation of layers or axial offsets between cable layers upon cutting, wrapping or dragging during use, and greatly improves the service life and structural reliability of the cable. Therefore, such cable is worth practicing and popularizing. When the above optical fiber composite fireproof cable is in use, both the entire cable and portion of the optical unit have good flame retardance and fire resistance, and can satisfy three assessments: no breakdown after being burnt by flame at 950°C for 3h; withstanding water spraying for 15min after 30min of burning at 650°C, and no breaking after 15min of beating and shocking under flame at 950°C; intact optical line after the composite cable is burnt by flame at 950°C for 90min. Therefore, it can ensure signal transmission of the optical fiber even when there is a fire and the composite cable may be monitored for temperature along its entire length by working with an early warning system and monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue.
Embodiment 3:
The embodiments of the present disclosure provides an intelligent early warning communication device which includes an early warning system or monitoring device of fire protection, and an optical fiber composite fireproof
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2019100250 08 Mar 2019 cable of any one described above. The optical fiber composite fireproof cable is configured to transmit the early warning information and real-time monitoring information sent from the early warning system or monitoring device of fire protection.
On such basis, optionally, the optical fiber (cable) composite fireproof cable is an optical fiber composite fireproof cable with a rated voltage of 0.6/1 kV.
The intelligent early warning communication device provided by the embodiments of the present disclosure, by combining the optical fiber composite fireproof cable and an early warning system or monitoring device of fire protection, realizes temperature monitoring along the entire length of the composite cable, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue.
The above embodiments are merely for illustrating the technical concept and features of the present disclosure, for those familiar with the art to understand the content of the present disclosure and implement based on such understanding, but not to limit the scope of protection of the present disclosure. Any equivalent variations or modifications made based on the spirit and essence of the present disclosure shall be encompassed by the scope of protection of the present disclosure.
Industrial applicability
The present disclosure provides an optical fiber composite fireproof cable and an intelligent early warning communication device. Both the entire cable and portion of the optical transmission unit have good flame retardance and fire resistance. The optical attenuation is relatively small even under high-temperature burning. While being capable of optical communication and having good performance of high temperature resistance and flame retardance, it can work with an early system or monitoring device of fire protection, so that a fire may be spotted at the beginning of its occurrence and an early warning may be sent out to reserve time for escape and rescue.

Claims (5)

  1. Claims:
    1. An optical fiber composite fireproof cable, comprising an optical unit for communication, an optical unit for early warning and at least three power transmission units, wherein the optical unit for communication, the optical unit for early warning and the power transmission units are stranded to form a cable core;
    the optical unit for communication comprises a loose bushing, a plurality of optical fibers for communication located within the loose bushing and a polyolefin sheathing layer extruded around an external surface of the loose bushing, the optical unit for early warning comprises a plurality of optical fibers for temperature measurement, a spiral steel pipe, a Kevlar fiber reinforced layer, a stainless steel braid layer and a Teflon sheathing layer, the optical fibers for temperature measurement are placed inside the spiral steel pipe, an external surface of the spiral steel pipe, from inside to outside, is coated with the Kevlar fiber reinforced layer, the stainless steel braid layer and the Teflon sheathing layer, the power transmission unit comprises a copper conductor, a mica tape layer coated on an external surface of the copper conductor and a polyolefin insulating layer, the polyolefin insulating layer is coated on an external surface of the mica tape layer; and a fiberglass wrapping tape wraps around an external surface of the cable core and thus forms a fiberglass wrapping tape layer, an infill is provided between the fiberglass wrapping tape layer and the cable core, a polyolefin fire-resistant layer is coated on an external surface of the fiberglass wrapping tape layer, an external sheath is extruded around an external surface of the polyolefin fire-resistant layer.
  2. 2. The optical fiber composite fireproof cable according to claim 1, wherein the external sheath is provided with a protrusion on its internal surface, the polyolefin fire-resistant layer is accordingly provided with a recess on its external surface, and the protrusion fits into the recess.
  3. 3. The optical fiber composite fireproof cable according to claim 2, wherein a plurality of protrusions are provided, the plurality of protrusions are arranged circumferentially along the internal surface of the external sheath, accordingly a plurality of recesses are provided, and the plurality of recesses provided are in the number same as number of the plurality of protrusions provided.
  4. 4. The optical fiber composite fireproof cable according to claim 2 or 3, wherein the protrusions have a semicircular shaped cross section, and the recesses have a semicircular shaped cross section.
  5. 5. An intelligent early warning communication device, comprising an early warning system or monitoring device of fire protection, and an optical fiber composite fireproof cable according to any one of claims 1-4, wherein the
    311194AU
    2019100250 08 Mar 2019 optical fiber composite fireproof cable is configured to perform real-time temperature monitoring along an entire length of the optical fiber composite fireproof cable, transmit detected temperature data to the early warning system or monitoring device of fire protection, and transmit early warning information and real-time monitoring information sent from the early warning system or monitoring device of fire protection.
AU2019100250A 2018-11-09 2019-03-08 Optical Fiber Composite Fireproof Cable and Intelligent Early Warning Communication Device Active AU2019100250A4 (en)

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CN201821840833.9U CN209045218U (en) 2018-11-09 2018-11-09 Intelligent early-warning communication fire prevention low-voltage cable
CN201821840833.9 2018-11-09

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CN112900245A (en) * 2021-03-31 2021-06-04 长安大学 Fireproof device for cable-stayed bridge inhaul cable and installation method thereof
CN114898933A (en) * 2021-12-15 2022-08-12 浙江兆龙互连科技股份有限公司 Composite double-layer fireproof flame-retardant cable and preparation method thereof
CN115116667A (en) * 2022-06-30 2022-09-27 齐鲁电缆有限公司 Signal transmission monitoring data detection integrated power cable
CN117410023A (en) * 2023-11-09 2024-01-16 北京城岳科技有限公司 Explosion-proof cable
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CN115881359B (en) * 2022-11-29 2023-07-28 人民电缆集团有限公司 Environment-friendly flame-retardant fireproof intelligent cable
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CN201549269U (en) * 2009-11-02 2010-08-11 中天科技海缆有限公司 Multi-core intelligent type multifunctional optical fiber composite special power cable
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CN111640530A (en) * 2020-06-01 2020-09-08 远东电缆有限公司 Flexible hoisting cable and preparation method thereof
CN112900245A (en) * 2021-03-31 2021-06-04 长安大学 Fireproof device for cable-stayed bridge inhaul cable and installation method thereof
CN112900245B (en) * 2021-03-31 2024-06-04 长安大学 Fireproof device for cable-stayed bridge stay cable and installation method thereof
CN114898933A (en) * 2021-12-15 2022-08-12 浙江兆龙互连科技股份有限公司 Composite double-layer fireproof flame-retardant cable and preparation method thereof
CN114898933B (en) * 2021-12-15 2024-02-23 浙江兆龙互连科技股份有限公司 Composite double-layer fireproof flame-retardant cable and preparation method thereof
CN115116667A (en) * 2022-06-30 2022-09-27 齐鲁电缆有限公司 Signal transmission monitoring data detection integrated power cable
CN117410023A (en) * 2023-11-09 2024-01-16 北京城岳科技有限公司 Explosion-proof cable
CN117410023B (en) * 2023-11-09 2024-04-26 济南马世基智能环保科技有限公司 Explosion-proof cable

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