CN213123923U - Armored high-flame-retardant fire-resistant power cable - Google Patents
Armored high-flame-retardant fire-resistant power cable Download PDFInfo
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- CN213123923U CN213123923U CN202021585099.3U CN202021585099U CN213123923U CN 213123923 U CN213123923 U CN 213123923U CN 202021585099 U CN202021585099 U CN 202021585099U CN 213123923 U CN213123923 U CN 213123923U
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Abstract
The utility model discloses an armor high flame retardant fire-resistant power cable, including a plurality of group sinle silks 1, every group sinle silk is outer cladding insulating layer 2 in proper order, insulating shield 3 and metallic shield 4, a plurality of group sinle silk 1 outsides after the transposition cladding inner sheath 5 in proper order, separate oxygen layer 6, armor 7 and oversheath 8, be provided with the filler between metallic shield 4 and the inner sheath 8, characterized by, be provided with buffering area 9 between insulating shield 3 and the metallic shield 4, armor 7 adopts the flat steel wire armor, it is provided with the reverse bundle steel band to hug closely the 7 outsides of armor. According to the scheme, the buffer belt 9 is wound outside the insulating shielding layer 3, so that when the line of the wire core is on fire, the metal shielding layer is prevented from damaging the insulating shielding layer due to expansion with heat and contraction with cold; armor 7 adopts flat steel wire armor to it is fixed through the reverse-binding steel band of hugging closely the armor 7 outside, adopts flat steel wire armor, and tensile and anti side pressure performance are superior, and compactness is good, better block the heat and to the inside transmission of cable.
Description
Technical Field
The utility model belongs to the technical field of the cable technique and specifically relates to an armor high flame retardant fire-resistant power cable.
Background
Along with the rapid increase of urban population, high-rise buildings, hotels, large supermarkets, hospitals, stations and airports are continuously increased, the number of dense occasions of personnel such as subways, tunnels, large public entertainment places, public transportation facilities and the like is rapidly increased, particularly the high-rise buildings bloom all the time, particularly the places where cables are densely laid are easy to cause fire disasters, and the places all have higher requirements on the flame-retardant and fire-resistant performance of the cables; therefore, an armored high-flame-retardant fireproof power cable which is suitable for being laid in a vertical environment, has good tensile and side pressure resistance, good cable performance and lower cost and has better flame-retardant, fireproof and fire-resistant functions is urgently needed. The prior art usually adopts steel band or ordinary round steel silk armor, can't satisfy tensile and anti side pressure characteristic simultaneously, and the compactness is not good, the transmission of heat to the insulation core can not fine separation. For example, a "copper core high flame retardant double insulation low smoke halogen-free fire resistant cable" disclosed in chinese patent document, whose publication number CN202534418U, comprises a stranded body formed by twisting three core wires, a flame retardant halogen-free glass fiber tape layer wrapped around the stranded body, and a low smoke halogen-free flame retardant sheath wrapped outside the flame retardant halogen-free glass fiber tape layer, wherein an inorganic mineral material is filled between the stranded body and the flame retardant halogen-free glass fiber tape layer; the core wire comprises a copper core conductor, a double-layer mica tape layer wrapped on the copper core conductor and a cross-linked polyethylene insulating layer extruded on the double-layer mica tape layer. The utility model discloses an except can transmit the electric energy under normal operating condition, still can keep the safe operation of certain time under the reburning condition. The low-smoke halogen-free flame-retardant sheath, the flame-retardant halogen-free glass fiber tape and the inorganic mineral material can resist high temperature, and the oxygen-insulating shell generated after decomposition plays a flame-retardant role. However, the prior art such as this kind of has low fire resistance, and the sinle silk expands after being heated, and wire or strap can damage the insulating layer, adopts steel band or ordinary round steel silk armor, can't satisfy tensile and anti side pressure characteristic simultaneously, and compactness is not good, can't be fine the transmission of separation heat to the insulating sinle silk.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome prior art's fire behavior low, the direct cladding metallic shield layer of insulating shield layer outside, the sinle silk is heated the back and is expanded, and wire or strap can harm insulatingly, adopts steel band or ordinary round steel wire armor, can't satisfy tensile and anti side pressure characteristic simultaneously, and compactness is not good, and separation heat that can not be fine is to the transmission scheduling problem of insulating sinle silk, provides a high fire-retardant fire-resistant power cable of armor, in order to realize above-mentioned purpose, the utility model discloses a following technical scheme:
the utility model provides an armor high fire-retardant fire-resistant power cable, includes a plurality of groups sinle silk, every group sinle silk is outer cladding insulating layer 2, insulating shield 3 and metallic shield 4 in proper order, and 1 outsides of a plurality of groups sinle silk after the transposition are cladding inner sheath 5 in proper order, separate oxygen layer 6, armor 7 and oversheath 8, are provided with the filler between metallic shield 4 and the inner sheath 5, characterized by, are provided with buffering area 9 between insulating shield 3 and the metallic shield 4, armor 7 adopts flat steel wire armor, hugs closely the 7 outsides of armor and is provided with the anti-bundle steel band. According to the scheme, the buffer belt 9 is wound outside the insulating shielding layer 3, so that when the line of the wire core is on fire, the metal shielding layer is prevented from damaging the insulating shielding layer due to expansion with heat and contraction with cold; armor 7 adopts flat steel wire armor to it is fixed through the reverse-binding steel band of hugging closely the armor 7 outside, adopts flat steel wire armor, and tensile and anti side pressure performance are superior, and compactness is good, better block the heat and to the inside transmission of cable.
Preferably, the inner sheath 5 is made of halogen-free low-smoke flame-retardant polyolefin material, and the outer sheath 8 is made of environment-friendly low-smoke halogen-free flame-retardant polyolefin material. The halogen-free low-smoke flame-retardant polyolefin inner sheath plays a role in high flame retardance and heat insulation; the outer sheath is an environment-friendly low-smoke halogen-free flame-retardant polyolefin sheath, so that the energy-saving environment-friendly flame-retardant polyolefin sheath has the functions of energy conservation and high flame retardance.
Preferably, the oxygen barrier layer 6 is made of ceramic halogen-free low-smoke flame-retardant polyolefin material. The ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer has the effects of heat insulation, cooling and incrustation after thermal decomposition, a large amount of hydrated oxides in the material are heated, water molecules are evaporated, a large amount of heat can be absorbed, the temperature of a cable is reduced, the oxygen concentration around the cable can be diluted by forming water vapor, flame and heat are prevented from spreading and transferring to the inside of the cable, on-site water pouring can be effectively resisted after the oxygen-insulating layer is incrusted, water is prevented from permeating into an insulating layer, and the normal operation of a circuit is maintained on a fire condition line.
Preferably, the filler is mineral paper rope. The mineral paper rope is flame-retardant, has excellent heat-conducting property and is beneficial to heat dissipation of the cable.
Preferably, glass fiber tapes are wrapped on the outer sides of the filler, the inner sheath 5, the oxygen isolation layer 6 and the reverse binding steel belt. After the glass fiber tape burns, the incrustation is fast, and the incrustation is very hard, closely knit, and horizontal burning can be from putting out and not postponing burning, and the transmission of outside heat to cable inside is slowed down to the power, the thermal transmission of prevention that can be better around package glass fiber tape, plays better flame retardant efficiency.
Preferably, the buffer zone 9 is made of a semiconductive high-temperature resistant material, and the thickness of the buffer zone 9 is 1.5 mm-2.5 mm. Wrap the semi-conductive high temperature resistant buffering area of one deck outside insulation shield, the sinle silk takes place to catch fire when the circuit, prevents that expend with heat and contract with cold from resulting in the metal shielding layer to produce the injury to insulation shield.
Preferably, the cable comprises three groups of cable cores, and the metal shielding layer 4 of each group of cable cores is shielded by a copper wire. Each group of wire cores is shielded by metal wires, so that the cross section of the metal shield is increased, and the requirement for larger short-circuit current is guaranteed.
Preferably, a plurality of air bags 11 are arranged between the inner sheath 5 and the oxygen isolation layer 6, the air bags 11 are distributed at equal intervals along the circumferential direction, and the air bags 11 are filled with carbon dioxide.
Therefore, the utility model discloses following beneficial effect has: (1) the high-temperature buffer belt is arranged, so that when the line is on fire, the wire core is prevented from being damaged by the metal shielding layer to the insulation shielding layer due to expansion caused by heat and contraction caused by cold; (2) the flat steel wire is adopted for armoring, so that the cable is excellent in tensile and side pressure resistance, good in compactness and capable of better preventing heat from being transmitted to the inside of the cable; (3) each group of wire cores are coated with a ceramic halogen-free low-smoke flame-retardant polyolefin fireproof fire-resistant layer, so that the cable is suitable for severe environment and meets the requirement of high fire resistance; (4) the heat-insulating fireproof layer is made of halogen-free low-smoke environment-friendly materials, has no toxicity after combustion, is soft in structure, small in bending radius, easy to install and lay and convenient to use; (5) the cable is filled with the mineral paper rope, so that the cable is flame-retardant, has excellent heat-conducting property and is beneficial to heat dissipation of the cable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the cable comprises a cable core 2, an insulating layer 3, an insulating shielding layer 4, a metal shielding layer 5, an inner sheath 6, an oxygen isolation layer 7, an armor layer 8, an outer sheath 9, a buffer strip 10, a filler 11 and an air bag.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
In the embodiment shown in fig. 1, an armored high-flame-retardant fire-resistant power cable comprises three groups of wire cores 1, wherein each group of wire cores is sequentially coated with an insulating layer 2, an insulating shielding layer 3 and a metal shielding layer 4, the outer sides of the twisted three groups of wire cores are sequentially coated with an inner sheath 5, an oxygen-isolating layer 6, an armor layer 7 and an outer sheath 8, and the metal shielding layer 4 is shielded by adopting copper wires, so that the cross section of metal shielding is increased, and a larger short-circuit current is ensured to be met; the inner sheath 5 is made of halogen-free low-smoke flame-retardant polyolefin material, the outer sheath 8 is made of environment-friendly low-smoke halogen-free flame-retardant polyolefin material, the halogen-free low-smoke flame-retardant polyolefin inner sheath plays a role in high flame retardance and heat insulation, and the outer sheath is made of environment-friendly low-smoke halogen-free flame-retardant polyolefin sheath, so that the energy-saving environment-friendly high-flame-retardant polyolefin sheath; a high-temperature buffer belt 9 is arranged between the insulating shielding layer 3 and the metal shielding layer 4, the buffer belt 9 is made of a semi-conductive high-temperature-resistant material, the thickness of the buffer belt 9 is 2mm, and when the wire core is on fire on a circuit, the metal shielding layer is prevented from damaging the insulating shielding layer due to expansion caused by heat and contraction caused by cold; a filler 10 is arranged between the metal shielding layer 4 and the inner sheath 5 after the three groups of wire cores 1 are twisted, the filler 10 is a mineral paper rope, and the mineral paper rope is flame-retardant, has excellent heat-conducting property and is beneficial to heat dissipation of the cable; a plurality of air bags 11 are arranged between the inner sheath 5 and the oxygen isolation layer 6, the air bags 11 are distributed at equal intervals along the circumferential direction, and carbon dioxide is filled in the air bags 11. Glass fiber belts are wound on the outer sides of the filler, the inner sheath 5, the oxygen isolation layer 6 and the reverse binding steel belt, after the glass fiber belts are combusted, the incrustation speed is high, the incrustation is very hard and compact, the horizontal combustion can be self-extinguished without delaying combustion, the transmission of external heat to the inside of the cable is powerfully slowed down, the transmission of heat can be better prevented by winding the glass fiber belts, and a better flame retardant effect is achieved; armor 7 adopts flat steel wire armor to it is fixed through the reverse-binding steel band of hugging closely the armor 7 outside, adopts flat steel wire armor, and tensile and anti side pressure performance are superior, and compactness is good, better block the heat and to the inside transmission of cable.
When a fire disaster happens, the buffer belt can prevent the metal shielding layer from damaging the insulating shielding layer due to expansion with heat and contraction with cold; when a large amount of hydrated oxides in the oxygen isolation layer are heated, water molecules are evaporated, a large amount of heat can be absorbed, the temperature of the cable is reduced, water vapor is formed to dilute the oxygen concentration around the cable, flame and heat are prevented from spreading and transferring to the interior of the cable, the oxygen isolation layer can effectively resist on-site water pouring after incrustation, water is prevented from permeating to an insulating layer, normal power supply of a line is guaranteed, so that systems of an elevator, emergency lighting, automatic alarming, disaster relief and the like can work normally, a fire resistance test of 90 minutes at the temperature of 750 plus 800 ℃ is met, the fire resistance operation temperature is improved, the power-on escape time is prolonged, the cable is guaranteed to keep the insulating property within a certain time, and the integrity of the line is guaranteed to.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (8)
1. The utility model provides an armor high fire-retardant fire-resistant power cable, includes a plurality of groups sinle silk (1), every group sinle silk cladding insulating layer (2), insulating shield (3) and metallic shield (4) outward in proper order, a plurality of groups sinle silk (1) outside after the transposition cladding inner sheath (5) in proper order, separate oxygen layer (6), armor (7) and oversheath (8), be provided with the filler between metallic shield (4) and inner sheath (5), characterized by is provided with between insulating shield (3) and the metallic shield (4) buffer tape (9), armor (7) adopt flat steel wire armor, hug closely the armor (7) outside and be provided with the anti-bundle steel band.
2. The armored high-flame-retardant fire-resistant power cable according to claim 1, wherein the inner sheath (5) is made of halogen-free low-smoke flame-retardant polyolefin material, and the outer sheath (8) is made of environment-friendly low-smoke halogen-free flame-retardant polyolefin material.
3. The armored high-flame-retardant fire-resistant power cable according to claim 1, wherein the oxygen barrier layer (6) is made of ceramic halogen-free low-smoke flame-retardant polyolefin material.
4. The armored high flame-retardant fire-resistant power cable according to claim 1, wherein the filler is mineral paper rope.
5. The armored high-flame-retardant fire-resistant power cable according to claim 1, 2, 3 or 4, wherein the fillers, the inner sheath (5), the oxygen-insulating layer (6) and the reverse-binding steel belt are wrapped with glass fiber tapes.
6. The armored high-flame-retardant fire-resistant power cable according to claim 1, wherein the buffer tape (9) is made of a semiconductive high-temperature-resistant material, and the thickness of the buffer tape (9) is 1.5mm to 2.5 mm.
7. The armored high-flame-retardant fire-resistant power cable as claimed in claim 1, which comprises three groups of wire cores, wherein the metal shielding layer (4) of each group of wire cores is shielded by copper strips.
8. The armored high-flame-retardant fire-resistant power cable according to claim 1, wherein a plurality of air bags (11) are arranged between the inner sheath (5) and the oxygen-insulating layer (6), the air bags (11) are distributed at equal intervals along the circumferential direction, and the air bags (11) are filled with carbon dioxide.
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CN202021585099.3U CN213123923U (en) | 2020-08-03 | 2020-08-03 | Armored high-flame-retardant fire-resistant power cable |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114093562A (en) * | 2021-10-29 | 2022-02-25 | 江苏帝诚线缆有限公司 | Fire monitoring is with fire-retardant fireproof cable |
CN116994834A (en) * | 2023-09-27 | 2023-11-03 | 天龙伟业线缆有限公司 | Preparation process of high-flame-retardance cable |
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2020
- 2020-08-03 CN CN202021585099.3U patent/CN213123923U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114093562A (en) * | 2021-10-29 | 2022-02-25 | 江苏帝诚线缆有限公司 | Fire monitoring is with fire-retardant fireproof cable |
CN114093562B (en) * | 2021-10-29 | 2023-12-08 | 江苏帝诚线缆有限公司 | Fire monitoring is with fire-retardant fireproof cable |
CN116994834A (en) * | 2023-09-27 | 2023-11-03 | 天龙伟业线缆有限公司 | Preparation process of high-flame-retardance cable |
CN116994834B (en) * | 2023-09-27 | 2023-12-15 | 天龙伟业线缆有限公司 | Preparation process of high-flame-retardance cable |
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