CN220137994U - Fire-resistant cable - Google Patents
Fire-resistant cable Download PDFInfo
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- CN220137994U CN220137994U CN202223252733.3U CN202223252733U CN220137994U CN 220137994 U CN220137994 U CN 220137994U CN 202223252733 U CN202223252733 U CN 202223252733U CN 220137994 U CN220137994 U CN 220137994U
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- cable
- fire
- cable core
- ceramic
- resistant
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 44
- 239000010410 layer Substances 0.000 claims abstract description 70
- 239000000919 ceramic Substances 0.000 claims abstract description 62
- 229920000098 polyolefin Polymers 0.000 claims abstract description 45
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 33
- 239000010445 mica Substances 0.000 claims abstract description 24
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 20
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 239000004945 silicone rubber Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 230000004888 barrier function Effects 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 14
- 239000008358 core component Substances 0.000 claims description 12
- 239000003063 flame retardant Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 4
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 11
- 238000009413 insulation Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000002955 isolation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RJDOZRNNYVAULJ-UHFFFAOYSA-L [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] RJDOZRNNYVAULJ-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model provides a fire-resistant cable. The fire-resistant cable comprises a cable core assembly, a ceramic silicone rubber wrapping belt, a ceramic polyolefin oxygen-insulating layer and an outer protective layer which are sequentially arranged from inside to outside, wherein the cable core assembly comprises a plurality of cable cores sequentially arranged along the circumferential direction of the fire-resistant cable, any two adjacent cable cores are mutually abutted and tangent, and each cable core comprises a conductor and a mica wrapping belt wrapped around the periphery of the conductor; the cable core assembly further comprises a filling piece, and the filling piece is arranged at the gap between two adjacent cable cores. According to the technical scheme, the closed fireproof layer can be formed, and the cable can be prevented from being damaged and can be normally powered when a fire disaster occurs.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a fire-resistant cable.
Background
The wide application of the safe and environment-friendly control cable is the necessary trend of the development of the control cable for the building market in China in the future, is an important component of social development and economic construction, and has wide development and application space for fire safety precaution. At present, the existing fire-resistant cable adopts a mode of wrapping a mica tape fire-resistant layer outside a conductor to prevent fire and flame. When the temperature reaches above 600 ℃, the mica tape is slowly formed into a thin layer of mineral substance, and the mineral substance layer is slowly cracked after burning for more than 90 minutes due to the fact that the fire resistance temperature of the common mica tape is 650 ℃. When a fire disaster occurs, water is directly sprayed on the surface of the cable, the mineral layer is rapidly cooled and is accelerated to crack, and the water flows onto the conductor to cause short circuit of the conductor; in addition, when a fire disaster occurs, the combustibles fall on the surface of the cable to crush the mineral layer, so that the fireproof layer is invalid. The cable is easy to cause short circuit or open circuit faults, and continuous power supply cannot be ensured after the cable is damaged.
Disclosure of Invention
The utility model mainly aims to provide a fire-resistant cable so as to solve the problem that the cable in the prior art cannot normally supply power due to short circuit and open circuit faults when a fire disaster occurs.
In order to achieve the above object, the present utility model provides a fire-resistant cable comprising a cable core assembly, a ceramic silicone rubber wrapping tape, a ceramic polyolefin oxygen barrier layer and an outer protective layer which are sequentially arranged from inside to outside, wherein the cable core assembly comprises a plurality of cable cores sequentially arranged along the circumferential direction of the fire-resistant cable, and each cable core comprises a conductor and a mica wrapping tape wrapped around the periphery of the conductor; the cable core assembly further comprises a filling piece, and the filling piece is arranged at the gap between two adjacent cable cores.
Further, the filling piece is a filling rope, and the filling rope is made of flame-retardant and high-temperature-resistant materials.
Further, the filling rope is a glass fiber twisting rope.
Further, the plurality of cable cores includes one intermediate cable core located in the middle of the cable core assembly and a plurality of outer cable cores circumferentially arranged around the intermediate cable core, each outer cable core abutting and tangential to the intermediate cable core.
Further, the ceramic silicone rubber is arranged on the periphery of the cable core component in a wrapping mode to form the cable core component with a round cross section, and the ceramic polyolefin oxygen-insulating layer is arranged on the periphery of the ceramic silicone rubber wrapping tape in an extrusion mode and has a round cross section.
Further, each cable core also includes an insulation layer disposed outside the mica wrap.
Further, the insulating layer is made of low smoke halogen-free silane crosslinked polyolefin.
Further, the fire resistant cable also includes a tape backing layer disposed between the ceramized polyolefin oxygen barrier layer and the outer jacket.
Further, the bag belt cushion layer is made of low-smoke halogen-free flame-retardant materials.
Further, the outer protective layer is made of B-grade low-smoke halogen-free flame retardant polyolefin.
By applying the technical scheme of the utility model, the mica wrapping tape is wrapped outside the conductor, so that the mica wrapping tape can play a role in preventing fire and retarding flame, and a first fireproof layer is formed; the filling piece fills the gap between two adjacent cable cores, so that the relative movement among a plurality of cable cores is avoided; the outer periphery of the cable core component is wrapped with the ceramic silicone rubber wrapping belt, so that the appearance structure of the cable core component is round; due to the material characteristics of the ceramic silicon rubber and the ceramic polyolefin, the ceramic silicon rubber wrapping tape and the ceramic polyolefin oxygen isolation layer can respectively form a second fireproof layer and a third fireproof layer, when the external flame reaches 500 ℃, the ceramic silicon rubber and the ceramic polyolefin are quickly crusted, the waterproof and water-blocking effects are achieved, the problem of short circuit of a conductor caused by direct spraying of water onto the conductor during fire extinguishment can be avoided, and the problem of failure of the fireproof layer caused by falling of a combustion object and crushing of the fireproof layer can be avoided because the sealed shell formed by the crusting has certain strength; on the other hand, the closed space formed by the ceramic silicon rubber winding tape and the ceramic polyolefin oxygen-isolation layer crusting also isolates oxygen, so that the cable core component in the closed space does not have the oxygen combustion-supporting condition required by flame combustion, and the three fireproof layers formed by the mica winding tape, the ceramic silicon rubber winding tape and the ceramic polyolefin oxygen-isolation layer can jointly act, so that the problem that the cable core is damaged due to continuous flame combustion in the closed space is avoided, and the continuous power supply of the cable can be ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a cross-sectional view of an embodiment of a fire resistant cable according to the utility model; and
fig. 2 shows a schematic structural view of a cable core assembly of the fire-resistant cable according to fig. 1.
Wherein the above figures include the following reference numerals:
1. a conductor; 2. mica wrapping tape; 3. a filler; 4. a ceramic polyolefin oxygen barrier layer; 5. an outer protective layer; 6. an insulating layer; 7. a belting cushion layer; 10. a cable core.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
The fire-resistant cable is mainly used for connecting fire-fighting power supply and fire-fighting facilities and power transmission and distribution cables with rated voltage of 1KV and below for transmitting electric energy.
As shown in fig. 1 and 2, embodiments of the present utility model provide a fire resistant cable. The fire-resistant cable comprises a cable core assembly, a ceramic silicon rubber wrapping belt, a ceramic polyolefin oxygen-insulating layer 4 and an outer protective layer 5 which are sequentially arranged from inside to outside, wherein the cable core assembly comprises a plurality of cable cores 10 which are sequentially arranged along the circumferential direction of the fire-resistant cable, two adjacent cable cores 10 are mutually abutted and tangent, and each cable core 10 comprises a conductor 1 and a mica wrapping belt 2 wrapped on the periphery of the conductor 1; the cable core assembly further comprises a filler 3, and the filler 3 is arranged at the gap between two adjacent cable cores 10.
The ceramic silicon rubber adopted by the ceramic silicon rubber wrapping belt is prepared by taking silicon rubber as a main raw material and adding other auxiliary agents such as a modifier, ceramic powder and a stabilizer, the ceramic polyolefin adopted by the ceramic polyolefin oxygen barrier layer 4 is prepared by taking halogen-free polyolefin as a main raw material and adding other auxiliary agents such as a modifier, ceramic powder and a stabilizer, the ceramic silicon rubber and the ceramic polyolefin can be rapidly crusted under a high temperature condition to form a closed ceramic container, and the fire-resistant temperature after crusting is up to 2000 ℃ and can last for 180min under a high temperature environment of 950+/-40 ℃. Both materials are prior art, and specific components and production processes are not described here.
In the technical scheme, the mica wrapping tape 2 is wrapped outside the conductor 1, so that the mica wrapping tape can play a role in preventing fire and retarding flame, and a first fireproof layer is formed; the filling piece 3 fills the gap between two adjacent cable cores 10, so that the relative movement among a plurality of cable cores 10 is avoided; the outer periphery of the cable core component is wrapped with the ceramic silicone rubber wrapping belt, so that the appearance structure of the cable core component is round (namely, the cross section of the cable core component is round); due to the material characteristics of the ceramic silicon rubber and the ceramic polyolefin, the ceramic silicon rubber wrapping tape and the ceramic polyolefin oxygen barrier layer 4 can respectively form a second fireproof layer and a third fireproof layer, when the external flame reaches 500 ℃, the ceramic silicon rubber and the ceramic polyolefin are quickly crusted, the waterproof and water-blocking effects are achieved, the problem of short circuit of a conductor caused by direct spraying of water onto the conductor 1 during fire extinguishment can be avoided, and the problem of failure of the fireproof layer caused by falling of a combustion object and crushing of the fireproof layer can be avoided because the sealed shell formed by the crusting has certain strength; on the other hand, the closed space formed by the ceramic silicon rubber wrapping tape and the ceramic polyolefin oxygen isolation layer 4 is isolated from oxygen, so that the cable core assembly in the closed space does not have the oxygen combustion-supporting condition required by flame combustion, the problem that the cable core 10 is damaged due to continuous flame combustion in the closed space is avoided, and continuous power supply of the cable can be ensured. In addition, the cable is made of inorganic materials, so that a large amount of smoke is not generated during combustion, toxic and harmful substances are not generated, and the safety of lives and properties of people is ensured.
Through the arrangement, the closed space formed by the ceramic silicon rubber wrapping tape and the ceramic polyolefin oxygen barrier layer 4 can avoid the problem of short circuit of the cable core 10 caused by water spraying to the conductor 1, and can also better avoid the problem of failure of the fireproof layer caused by falling of a combustion object to crush the fireproof layer; the three fireproof layers formed by the mica wrapping tape 2, the ceramic silicone rubber wrapping tape and the ceramic polyolefin oxygen barrier layer 4 can act together to prevent the cable core 10 from burning, so that the cable is not damaged and can continuously supply power in case of fire.
Preferably, the outer sheath 5 is made of a B1 grade low smoke halogen-free flame retardant polyolefin material, wherein the "B1 grade" refers to the flame retardant grade specified in the national standard GB 31247-2014. The outer protective layer 5 can be tightly attached to the ceramic polyolefin oxygen barrier layer 4 and quickly crusted during combustion, and can also play a role in preventing flame from spreading, so that the continuous power supply of the cable is further ensured.
In the prior art, as the fire-resistant temperature of the common gold mica tape is 650 ℃, the mode of only adopting the mica tape as a fire-resistant layer has certain requirements on the wrapping thickness of the mica tape, and compared with the prior art, the fire-resistant cable has smaller overall diameter.
In the embodiment of the utility model, the filling member 3 is a filling rope, and the filling rope is made of a flame-retardant and high-temperature-resistant material.
By the arrangement, the filling member 3 can fill the gap between the adjacent two cable cores 10, and relative movement between the plurality of cable cores 10 is avoided. Meanwhile, the fire-retardant and high-temperature-resistant material is adopted for manufacturing, and the fire-retardant and high-temperature-resistant material can further play a role in fire prevention and flame retardance.
Preferably, the filler cord is a glass fiber lay cord.
In the embodiment of the utility model, the ceramic silicon rubber wrapping belt is arranged on the periphery of the cable core component in a wrapping mode to form the cable core component with a round cross section, the ceramic polyolefin oxygen barrier layer 4 is arranged on the periphery of the ceramic silicon rubber wrapping belt in an extrusion mode, and the cross section of the ceramic polyolefin oxygen barrier layer 4 is round.
In the above technical scheme, adopt the wrapped mode winding pottery silicon rubber to wind the band and have the gap, adopt the mode of continuous extrusion to set up pottery polyolefin and separate oxygen layer 4 at the periphery of pottery silicon rubber around the band, can make pottery polyolefin separate oxygen layer 4 complete closely cladding in pottery silicon rubber around the band, can stop the gap like this to ensure the sealing performance of cable.
As shown in fig. 1 and 2, in an embodiment of the utility model, each cable core 10 further comprises an insulating layer 6 arranged outside the mica taping 2.
Through the arrangement, the insulating layer 6 is arranged outside the mica wrapping tape 2 in an extrusion mode, so that the mica wrapping tape 2 can be prevented from being wetted, and the insulating effect can be achieved.
Preferably, the insulating layer 6 is made of a low smoke halogen-free silane crosslinked polyolefin.
The insulation resistance is greatly affected by temperature, and generally, the insulation resistance decreases with an increase in temperature. When the temperature increases, polarization in the insulating medium increases, electrical conductance increases, resulting in a decrease in resistance value, and the change in resistance value is related to the degree of change in temperature, the nature and structure of the insulating material, and the like. The maximum working temperature of the common polyvinyl chloride insulation is 70 ℃ for a long time, and the maximum working temperature of the low smoke halogen-free silane crosslinked polyolefin insulation is 105 ℃ for a long time. Under the conventional condition, compared with the common polyvinyl chloride insulation, the low-smoke halogen-free silane crosslinked polyolefin can improve the current-carrying capacity of one specification of the cable, so that the electricity consumption can be saved, and the cost can be reduced.
For example, the specification is 4mm 2 The current-carrying capacity of the common polyvinyl chloride is 31A, and the specification is 4mm when the low-smoke halogen-free silane crosslinked polyolefin is used for insulation 2 The current-carrying capacity can reach 42A at maximum, which is equivalent to 6mm in specification 2 Is a common polyvinyl chloride.
As shown in fig. 1, in an embodiment of the utility model, the fire resistant cable further comprises a tape backing layer 7 disposed between the ceramified polyolefin oxygen barrier layer 4 and the outer jacket 5.
It should be noted that, the oxygen isolation layer in the prior art is heated and expanded to lead the outer sheath to be separated from the cable body, the dropped outer sheath is continuously burnt to cause the problem of burning other combustible substances, and the hidden danger of expanding the fire area exists.
Through the arrangement, on one hand, the wrapping tape cushion layer 7 can play a role in flame retardance, and heat transfer and heat release during cable combustion are relieved. On the other hand, the wrapping tape cushion layer 7 can also play a role in buffering, so that the problem that the outer protective layer 5 is broken by extruding the burnt outer protective layer 5 after the ceramic polyolefin oxygen barrier layer 4 is heated and expanded to enable the outer protective layer 5 to fall off is avoided.
Preferably, the wrapping tape cushion 7 is made of low-smoke halogen-free flame retardant polyolefin or glass fiber tape.
In the embodiment of the utility model, the mica wrapping tape 2 is a synthetic mica tape.
In one embodiment of the present utility model, a plastic sealing film is wound around the outer circumference of the cable core 10 during the production of the fire-resistant cable, so as to avoid the cable core 10 from being in contact with air, thereby avoiding the problem of oxidation of the conductor 1 due to moisture absorption of the cable core 10.
In one embodiment of the utility model, a diameter measuring instrument is arranged in the process of producing the fire-resistant cable, and the outer diameter size of the cable coated with the insulating layer 6 after the completion of the process is automatically checked, so that the nominal thickness of the cable insulation meets the standard requirement.
According to the test result, the fire-resistant temperature of the fire-resistant cable is improved to 950+/-40 ℃ from the original 750-800 ℃; the fire-resistant time is prolonged to 180min from 90 min; also, the fire resistant cable is capable of passing the relevant test requirements of BS 6387:2013 and GB 31247-2014.
The fire-resistant cable can meet the fire-resistant and water-resistant requirements. The fire-resistant cable has obvious isolating and flame-retardant effects, can fully ensure the power supply of a fire-fighting system under the condition of fire disaster, uses inorganic mineral composite insulation, does not generate a large amount of smoke and toxic gas during combustion, and greatly prolongs the service life of the fire-resistant cable.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the mica wrapping tape, the ceramic silicone rubber wrapping tape and the ceramic polyolefin oxygen-isolating layer form three fireproof layers together; the ceramic silicon rubber wrapping tape and the ceramic polyolefin oxygen-isolation layer can also play a role in blocking water, so that the continuous power supply of the cable is ensured. The filling piece can avoid relative movement among a plurality of cable cores; the ceramic silicon rubber wrapping tape can enable the appearance structure of the cable core assembly to be round, and the insulating layer can prevent mica from being wetted by the wrapping tape. The tape cushion layer can prevent the outer protective layer from falling off due to extrusion of the outer protective layer after the ceramic polyolefin oxygen barrier layer is heated and expanded.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The fire-resistant cable is characterized by comprising a cable core assembly, a ceramic silicon rubber wrapping belt, a ceramic polyolefin oxygen-insulating layer (4) and an outer protective layer (5) which are sequentially arranged from inside to outside, wherein the cable core assembly comprises a plurality of cable cores (10) which are sequentially arranged along the circumferential direction of the fire-resistant cable, any two adjacent cable cores (10) are mutually abutted and tangent, and each cable core (10) comprises a conductor (1) and a mica wrapping belt (2) wrapped on the periphery of the conductor (1);
the cable core assembly further comprises filling pieces (3), and the filling pieces (3) are arranged at the gaps between two adjacent cable cores (10);
the plurality of cable cores (10) comprise one middle cable core positioned in the middle of the cable core assembly and a plurality of outer cable cores circumferentially arranged around the middle cable core, and each outer cable core is abutted and tangent with the middle cable core.
2. Fire resistant cable according to claim 1, characterized in that the filler (3) is a filler rope made of a fire resistant and high temperature resistant material.
3. The fire resistant cable according to claim 2, wherein the filler rope is a glass fiber lay.
4. A fire resistant cable according to any one of claims 1 to 3, wherein the ceramic silicone rubber wrapping tape is arranged on the periphery of the cable core component in a wrapping manner to form a cable core component with a circular cross section, the ceramic polyolefin oxygen barrier layer (4) is arranged on the periphery of the ceramic silicone rubber wrapping tape in an extrusion manner, and the ceramic polyolefin oxygen barrier layer (4) has a circular cross section.
5. A fire resistant cable according to any one of claims 1 to 3, characterized in that each of the cable cores (10) further comprises an insulating layer (6) arranged outside the mica taping (2).
6. Fire resistant cable according to claim 5, characterized in that the insulating layer (6) is made of a low smoke halogen free silane crosslinked polyolefin.
7. A fire resistant cable according to any one of claims 1 to 3, characterized in that it further comprises a tape cushion layer (7) arranged between the ceramic polyolefin oxygen barrier layer (4) and the outer sheath (5).
8. Fire-resistant cable according to claim 7, characterized in that the tape mat (7) is made of a low-smoke halogen-free flame-retardant material.
9. A fire resistant cable according to any one of claims 1 to 3, characterized in that the outer sheath (5) is made of a low smoke halogen free flame retardant polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223252733.3U CN220137994U (en) | 2022-12-05 | 2022-12-05 | Fire-resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223252733.3U CN220137994U (en) | 2022-12-05 | 2022-12-05 | Fire-resistant cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220137994U true CN220137994U (en) | 2023-12-05 |
Family
ID=88953950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223252733.3U Active CN220137994U (en) | 2022-12-05 | 2022-12-05 | Fire-resistant cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220137994U (en) |
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2022
- 2022-12-05 CN CN202223252733.3U patent/CN220137994U/en active Active
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