CN215600155U - Flame-retardant B1-grade photoelectric composite cable - Google Patents
Flame-retardant B1-grade photoelectric composite cable Download PDFInfo
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- CN215600155U CN215600155U CN202121349202.9U CN202121349202U CN215600155U CN 215600155 U CN215600155 U CN 215600155U CN 202121349202 U CN202121349202 U CN 202121349202U CN 215600155 U CN215600155 U CN 215600155U
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Abstract
The utility model discloses a flame-retardant B1-grade photoelectric composite cable, which comprises a cable core, an oxygen isolation layer, a flame-retardant belting layer and a sheath layer, wherein the cable core, the oxygen isolation layer, the flame-retardant belting layer and the sheath layer are sequentially arranged from inside to outside; the cable core is made by cabling an optical fiber unit, a filling wire and a plurality of conductors, and the filling wire is positioned in the center of the cable core; the oxygen isolation layer is wrapped and covered on the cable core by adopting ceramic silicon rubber. The cable core of the flame-retardant B1-grade photoelectric composite cable is compounded with the optical fiber unit, and the flame-retardant B1-grade photoelectric composite cable has the capability of transmitting power and signals and can well reduce the construction cost of the cable. The oxygen-isolating layer of the utility model is wrapped and covered on the cable core by adopting ceramic silicon rubber. The oxygen isolation layer protects the cable core, the adopted ceramic silicon rubber has rubber elasticity at normal temperature, but can be crusted into a hard protective layer in flame with the temperature higher than 500 ℃, the hard shell does not melt and drip in a fire environment, the structural integrity of the cable can be maintained, and the normal operation of the cable is ensured.
Description
Technical Field
The utility model relates to the technical field of wires and cables, in particular to a flame-retardant B1-grade photoelectric composite cable.
Background
With the development of economy in China, the fire safety of all levels of society is more and more emphasized, a cable is an important carrier for transmitting electric power, and when a fire disaster is caused by the cable, serious consequences can be caused, and even the life safety of people is endangered. According to data statistics: in recent years, more than 60% of fires caused by various electrics in China are caused by electric lines (wires and cables), and immeasurable loss is brought to personal safety and property; it follows that safety fire protection cables have become a major concern in safety fire protection operations.
The cable is classified into a common cable, a flame-retardant cable and a fire-resistant cable according to the grade of combustion performance. GB31247-2014 is proposed by the national Ministry of public Security, Sichuan fire department, Union Standard Committee, and the combustion performance of the cable and the optical cable is graded. The cable with the combustion performance grade B1 has the advantages that the requirement on the combustion performance of the cable is improved, and the cable with the combustion performance grade B1 is mainly used in places with dense population and places needing special protection, such as subways, airports, markets, hospitals, kindergartens, high-rise buildings and the like in an engineering construction fireproof system.
The applicant researches and discovers that the conventional flame-retardant cable has the following technical problems:
at present, most of cables commonly used in domestic fire-fighting places are common flame-retardant cables, the cables have certain flame spread prevention capability in fire, the smoke release amount in the combustion process meets the requirement of 60% light transmittance, but the cables are insufficient, and the influence of the cables on surrounding combustible substances in the fire, such as heat release amount, combustion drops and the like, is not fully considered. And the general power cable does not contain the signal transmission function, need set up the optic fibre in addition when needing signal transmission, causes the very big waste of cost.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defects, the utility model provides a flame-retardant B1-grade photoelectric composite cable.
In order to solve the problems, the utility model is realized according to the following technical scheme:
the utility model relates to a flame-retardant B1-grade photoelectric composite cable, which comprises a cable core, an oxygen isolation layer, a flame-retardant belting layer and a sheath layer which are sequentially arranged from inside to outside;
the cable core is made by cabling an optical fiber unit, a filling wire and a plurality of conductors, and the filling wire is positioned in the center of the cable core;
the oxygen isolation layer is wrapped and covered on the cable core by adopting ceramic silicon rubber.
Preferably, the sheath layer is wrapped by a low-smoke halogen-free flame-retardant polyolefin material and covers the flame-retardant wrapping tape layer in an extruding manner.
Preferably, the flame-retardant wrapping tape layer is formed by wrapping halogen-free low-smoke flame-retardant wrapping tapes on the oxygen-insulating layer by a wrapping machine.
Preferably, the surface of the conductor is provided with an insulating layer, and the insulating layer is wrapped on the conductor by adopting cross-linked polyethylene.
Preferably, the conductor adopts a first conductor structure or a second conductor structure specified in GB/T3956-2008 cable conductors.
Preferably, the outer surface of the optical fiber unit is provided with a corrugated copper pipe protection layer and an optical fiber sheath layer, and the optical fiber sheath layer is located on the outermost layer.
Preferably, the cable core is formed by cabling an optical fiber unit, a filler wire and 3 conductors, and the filler wire is positioned in the center of the cable core.
Compared with the prior art, the utility model has the beneficial effects that:
the cable core of the flame-retardant B1-grade photoelectric composite cable is compounded with the optical fiber unit, and the flame-retardant B1-grade photoelectric composite cable has the capability of transmitting power and signals and can well reduce the construction cost of the cable.
The oxygen-isolating layer of the utility model is wrapped and covered on the cable core by adopting ceramic silicon rubber. The oxygen isolation layer protects the cable core, the adopted ceramic silicon rubber has rubber elasticity at normal temperature, but can be crusted into a hard protective layer in flame with the temperature higher than 500 ℃, the hard shell does not melt and drip in a fire environment, the structural integrity of the cable can be maintained, and the normal operation of the cable is ensured. And does not fall off like the mica tape.
The cable product can meet the requirements of flame retardant grade B1, and the additional information performance can meet the requirements of combustion drippings/particles grade d0, smoke toxicity grade t0 and corrosivity grade a 1.
Drawings
Embodiments of the utility model are described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic cross-sectional structure of a flame-retardant B1-grade photoelectric composite cable of the present invention;
in the figure:
10-cable core, 11-optical fiber unit, 111-corrugated copper tube protective layer, 112-optical fiber sheath layer, 12-filling wire and 13-conductor;
20-oxygen barrier layer
30-flame retardant belting layer;
40-sheath layer.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1, the preferred structure of the flame-retardant B1-grade photoelectric composite cable is disclosed in the present invention.
As shown in fig. 1, the flame-retardant B1-grade photoelectric composite cable comprises a cable core 10, an oxygen barrier layer 20, a flame-retardant tape layer 30 and a sheath layer 40, which are sequentially arranged from inside to outside.
In one embodiment, the cable core is made by cabling an optical fiber unit 11, a filler wire 12 and a plurality of conductors 13, the filler wire 12 being located in the center of the cable core. The cable core 10 is compounded with the optical fiber unit 11, and meanwhile, the cable core has the power and signal transmission capacity, so that the construction cost of the cable can be well reduced.
In one embodiment, the cable core is made by cabling an optical fiber unit, a filler wire, and 3 conductors, with the filler wire being located in the center of the cable core. The 3 conductors, the filling wire and the optical fiber unit are cabled together to form a cabled wire core.
In one specific implementation, the conductor 13 adopts a first conductor structure or a second conductor structure specified in GB/T3956-2008 cable conductors; the conductor is formed by drawing and twisting an oxygen-free copper rod. The filler wire 12 may be filled with a rock wool rope.
Preferably, an insulating layer is arranged on the surface of the conductor 13, and the insulating layer is extruded and covered on the conductor by adopting crosslinked polyethylene. The insulating layer is made of cross-linked polyethylene materials, is coated on the conductor in an extrusion coating mode, and then is cross-linked in a warm water cross-linking mode. The insulating layer is extruded by adopting an extruding pipe type mould.
In one embodiment, the outer surface of the optical fiber unit 11 is provided with a corrugated copper tube protection layer 111 and an optical fiber sheath layer 112, and the optical fiber sheath layer 112 is located at the outermost layer. The corrugated copper pipe protection layer 111 of the optical fiber unit 11 can prevent the optical fiber from being damaged during cabling, and can play a role in shielding to prevent the optical fiber signal transmission from being influenced by power transmission. The optical fiber sheath layer is extruded by using the existing sheath material, which is not described too much here.
In one implementation, the oxygen barrier layer 20 is extruded and covered on the cable core by using ceramic silicon rubber. The oxygen-isolating layer of the utility model is wrapped and covered on the cable core by adopting ceramic silicon rubber. The oxygen isolation layer protects the cable core, the adopted ceramic silicon rubber has rubber elasticity at normal temperature, but can be crusted into a hard protective layer in flame with the temperature higher than 500 ℃, the hard shell does not melt and drip in a fire environment, the structural integrity of the cable can be maintained, and the normal operation of the cable is ensured. And does not fall off like the mica tape.
In a specific implementation, the oxygen-isolating layer 20 is extruded through an extrusion type die, the extrusion type die realizes final shaping of a product by pressure, the oxygen-isolating layer is directly extruded and coated on the cable core through extrusion of the die, and the extruded oxygen-isolating layer is compact and firm in structure. The oxygen barrier layer is tightly combined with the product without gaps.
In one embodiment, the flame-retardant wrapping layer 30 is made of a halogen-free low-smoke flame-retardant wrapping tape and is wrapped on the oxygen-insulating layer by a wrapping machine.
In one embodiment, the sheath layer 40 is extruded and covered on the flame retardant wrapping tape layer by using a low smoke halogen-free flame retardant polyolefin material. The outer sheath layer is made of low-smoke halogen-free polyolefin material with good crusting performance and low heat productivity, and is matched with the oxygen isolation layer, so that the combustion dripping performance and heat release of the material can be reduced.
The product can meet the requirements of flame retardant grade B1, and the additional information performance can meet the requirements of combustion drop/particle grade d0, smoke toxicity grade t0 and corrosivity grade a 1.
The cable has the advantages of flame retardance, low smoke and halogen, low heat release amount, low dropping, low smoke and gas toxicity and low corrosivity by selecting novel materials, optimizing the structure and designing the process, is favorable for environmental protection and personal safety, is suitable for places with dense personnel, realizes double functions of power transmission and signal transmission by photoelectric compounding, and reduces the construction difficulty and the construction cost.
Other structures of the flame-retardant B1-grade photoelectric composite cable are disclosed in the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (7)
1. A flame-retardant B1-grade photoelectric composite cable is characterized by comprising a cable core, an oxygen barrier layer, a flame-retardant belting layer and a sheath layer which are sequentially arranged from inside to outside;
the cable core is made by cabling an optical fiber unit, a filling wire and a plurality of conductors, and the filling wire is positioned in the center of the cable core;
the oxygen isolation layer is wrapped and covered on the cable core by adopting ceramic silicon rubber.
2. The flame-retardant B1-grade photoelectric composite cable according to claim 1, wherein:
the sheath layer is wrapped on the flame-retardant wrapping tape layer in an extruded mode by adopting a low-smoke halogen-free flame-retardant polyolefin material.
3. The flame-retardant B1-grade photoelectric composite cable according to claim 1, wherein:
the flame-retardant belting layer adopts halogen-free low-smoke flame-retardant belting to be coated on the oxygen-isolating layer by a wrapping machine.
4. The flame-retardant B1-grade photoelectric composite cable according to claim 1, wherein:
the surface of the conductor is provided with an insulating layer, and the insulating layer is wrapped on the conductor in an extruded mode through cross-linked polyethylene.
5. The flame-retardant B1-grade photoelectric composite cable according to claim 4, wherein:
the conductor adopts a first conductor structure or a second conductor structure specified in GB/T3956-2008 cable conductors.
6. The flame-retardant B1-grade photoelectric composite cable according to claim 1, wherein:
the outer surface of the optical fiber unit is provided with a corrugated copper pipe protective layer and an optical fiber sheath layer, and the optical fiber sheath layer is located on the outermost layer.
7. The flame-retardant B1-grade photoelectric composite cable according to any one of claims 1 to 6, wherein:
the cable core is made by cabling an optical fiber unit, a filling wire and 3 conductors, and the filling wire is positioned in the center of the cable core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121349202.9U CN215600155U (en) | 2021-06-17 | 2021-06-17 | Flame-retardant B1-grade photoelectric composite cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121349202.9U CN215600155U (en) | 2021-06-17 | 2021-06-17 | Flame-retardant B1-grade photoelectric composite cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215600155U true CN215600155U (en) | 2022-01-21 |
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ID=79875798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121349202.9U Active CN215600155U (en) | 2021-06-17 | 2021-06-17 | Flame-retardant B1-grade photoelectric composite cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215600155U (en) |
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2021
- 2021-06-17 CN CN202121349202.9U patent/CN215600155U/en active Active
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