CN220306021U - Low smoke zero halogen fire-resistant power cable of concentric conductor - Google Patents
Low smoke zero halogen fire-resistant power cable of concentric conductor Download PDFInfo
- Publication number
- CN220306021U CN220306021U CN202321060186.0U CN202321060186U CN220306021U CN 220306021 U CN220306021 U CN 220306021U CN 202321060186 U CN202321060186 U CN 202321060186U CN 220306021 U CN220306021 U CN 220306021U
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- layer
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- fire
- insulating
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- 239000004020 conductor Substances 0.000 title claims abstract description 37
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 28
- 239000000779 smoke Substances 0.000 title claims abstract description 14
- 229910052736 halogen Inorganic materials 0.000 title claims description 12
- 150000002367 halogens Chemical class 0.000 title claims description 11
- 239000003063 flame retardant Substances 0.000 claims abstract description 83
- 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 abstract description 76
- 229920001971 elastomer Polymers 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 239000010445 mica Substances 0.000 claims abstract description 15
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 15
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims abstract description 13
- 229920000573 polyethylene Polymers 0.000 claims abstract description 13
- 239000011490 mineral wool Substances 0.000 claims abstract description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 7
- 239000008397 galvanized steel Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 91
- 239000000463 material Substances 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 5
- 229920000459 Nitrile rubber Polymers 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
The utility model relates to a concentric conductor low-smoke halogen-free fire-resistant power cable, which belongs to the technical field of power cables, wherein a flame-retardant insulating layer is coaxially wrapped outside a cable core, an insulating shielding layer is wrapped outside the flame-retardant insulating layer, a concentric conductor is arranged outside the insulating shielding layer, a flame-retardant armor layer is coaxially wrapped outside the insulating shielding layer, the concentric conductor is arranged in the flame-retardant armor layer, a flame-retardant sheath layer is wrapped outside the flame-retardant armor layer, special magnesium oxide for wires and cables is filled between the flame-retardant insulating layer and the insulating shielding layer, and the speed of the temperature spreading to the cable core during flame combustion is delayed through flame-retardant rubber of the flame-retardant sheath layer; the rock wool of the flame-retardant sheath layer does not support combustion, the ceramic polyethylene hydrocarbon insulating layer adopted outside the wire core unit can be crusted when being subjected to flame high temperature, the insulating effect can be further achieved after the crusting, the fire-resistant mica tape improves the fire resistance of the wire core, normal transmission of current in the cable is guaranteed, and fire or circuit faults caused by short circuit can not be caused due to conductor contact between the high Wen Xianxin units.
Description
Technical Field
The utility model belongs to the technical field of power cables, and particularly relates to a concentric conductor low-smoke zero-halogen fireproof power cable.
Background
With the development of modern science and technology, energy and information are indispensable resources, and no matter what electric energy or information is transmitted, cables are separated, but unsafe cables are also one of important ways for spreading fire. According to incomplete statistics, about 35% of accidents caused by cables in fire disaster are choked and dead people about one third of the accidents are choked and dead people because toxic gases released when the cables are inhaled and burnt. Thus, preventing the cable from burning and releasing toxic and harmful corrosive gases and fumes has been a problem that the cable industry must face.
The traditional protective layer material of the fire-resistant cable is mainly selected from halogen-containing materials such as fire-resistant polyvinyl chloride, chlorosulfonated polyethylene and the like to prevent fire spread. However, the fire-resistant cables belong to inflammable materials, and a large amount of toxic and harmful smoke and corrosive gas are released in the burning process of the materials, so that the poor light transmittance of the gas makes escape and rescue work on fire scene difficult, and the toxic gas is easy to suffocate people, so that the life and property safety of people is seriously endangered.
Disclosure of Invention
The utility model aims to solve the technical problems, and further provides a concentric conductor low-smoke halogen-free fireproof power cable.
The specific technical scheme of the utility model is as follows: a concentric conductor low smoke zero halogen fire resistant power cable comprising: the cable comprises a cable core, wherein a flame-retardant insulating layer is coaxially wrapped outside the cable core, an insulating shielding layer is coaxially wrapped outside the flame-retardant insulating layer, a plurality of concentric conductors are arranged on the outer circumference of the insulating shielding layer in an array mode, a flame-retardant armor layer is coaxially wrapped outside the insulating shielding layer, the concentric conductors are arranged in the flame-retardant armor layer, a flame-retardant sheath layer is coaxially wrapped outside the flame-retardant armor layer, and special magnesium oxide for wires and cables is filled between the flame-retardant insulating layer and the insulating shielding layer.
Further, the flame retardant insulating layer includes: the fire-resistant mica layer and the ceramic polyethylene hydrocarbon insulating layer are coaxially wrapped outside the wire core, and the ceramic polyethylene hydrocarbon insulating layer which forms a ceramic shell at a high temperature is coaxially wrapped outside the fire-resistant mica layer.
Further, the concentric conductor is characterized in that the concentric conductor is formed by twisting a plurality of copper wire cores.
Further, the flame retardant armor layer comprises: the first flame-retardant rubber layer is coaxially wrapped outside the insulating shielding layer, a galvanized steel wire layer is coaxially arranged in the first flame-retardant rubber layer, and a plurality of concentric conductors are arranged between the galvanized steel wire layer and the outer wall of the first flame-retardant rubber layer in a circumferential array.
Further, the flame retardant jacket layer includes: the second flame-retardant rubber layer is coaxially wrapped outside the flame-retardant armor layer, and a rock wool layer which goes out from fire is coaxially arranged in the second flame-retardant rubber layer.
Further, the first flame retardant rubber layer and the second flame retardant rubber layer are both polymers of halogen-free polyvinyl chloride and halogen-free nitrile rubber.
Further, the wire core is a silver-plated copper wire, and the thickness of the silver plating layer is 3-5 mu m.
The beneficial effects are that: the flame-retardant rubber of the flame-retardant sheath layer structurally ensures the speed of temperature spreading to the core wire core unit when flame burns, and improves the fire-resistant efficiency; the rock wool which is extinguished immediately after leaving fire by adopting the flame-retardant sheath layer can ensure that the rock wool does not support combustion when fire and flame burn, and is suitable for the structural requirements of the fireproof cable. The ceramic polyethylene hydrocarbon insulating layer adopted by each wire core unit can be crusted when being subjected to high temperature of flame, can not burn like crosslinked polyethylene, can still play insulating effect after being crusted, further improves the fire resistance and corrosion resistance of each wire core unit by adding the fire-resistant mica tape between the conductor and the ceramic polyolefin insulating layer, ensures normal transmission of current in the cable, and can not cause fire disaster or circuit failure caused by short circuit because of conductor contact between the wire core units after being subjected to high temperature.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a layered structure of the present utility model;
the figure indicates:
the cable comprises a cable core 1, a flame-retardant insulating layer 2, a fire-resistant mica layer 21, a ceramic polyethylene hydrocarbon insulating layer 22, an insulating shielding layer 3, a concentric conductor 4, a flame-retardant armor layer 5, a galvanized steel wire layer 51, a first flame-retardant rubber layer 52, a flame-retardant sheath layer 6, a rock wool layer 61 and a second flame-retardant rubber layer 62.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "middle," "outer," "inner," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1: a concentric conductor low smoke zero halogen fire resistant power cable, as described with reference to figure 1, comprising: the wire core 1 is coaxially wrapped with a flame-retardant insulating layer 2,
the flame-retardant insulating layer 2 is externally coaxially wrapped with an insulating shielding layer 3, a plurality of concentric conductors 4 are arranged on the outer circumference array of the insulating shielding layer 3, the insulating shielding layer 3 is coaxially wrapped with a flame-retardant armor layer 5, the concentric conductors 4 are arranged in the flame-retardant armor layer 5, the flame-retardant armor layer 5 is externally coaxially wrapped with a flame-retardant sheath layer 6, and special magnesium oxide for wires and cables is filled between the flame-retardant insulating layer 2 and the insulating shielding layer 3, so that the flame-retardant shielding layer is structurally provided with flame-retardant rubber, so that the speed of temperature spreading to a core wire core unit during flame combustion is ensured, and the flame-retardant efficiency is improved; the rock wool which is extinguished immediately after leaving fire by adopting the flame-retardant sheath layer can ensure that the rock wool does not support combustion when fire and flame burn, and is suitable for the structural requirements of the fireproof cable. The ceramic polyethylene hydrocarbon insulating layer adopted by each wire core unit can be crusted when being subjected to high temperature of flame, can not burn like crosslinked polyethylene, can still play insulating effect after being crusted, further improves the fire resistance and corrosion resistance of each wire core unit by adding the fire-resistant mica tape between the conductor and the ceramic polyolefin insulating layer, ensures normal transmission of current in the cable, and can not cause fire disaster or circuit failure caused by short circuit because of conductor contact between the wire core units after being subjected to high temperature.
Example 2: on the basis of the embodiment 1, the description is made with reference to fig. 1 and 2, and the flame retardant insulating layer 2 includes: the fire-resistant mica layer 21 and the ceramic polyethylene hydrocarbon insulating layer 22, the fire-resistant mica layer 21 is wrapped in to the coaxial core outside the sinle silk 1, the ceramic polyethylene hydrocarbon insulating layer 22 that forms ceramic shell under the high temperature state is wrapped in to the coaxial core outside the fire-resistant mica layer 21, so set up, through the concrete structure diagram that increases fire-retardant insulating layer 2, fire-resistant mica tape 21 and ceramic polyethylene hydrocarbon insulating layer 22, ceramic polyethylene hydrocarbon insulating layer can crust when receiving flame high temperature, guarantee the intensity of cable, fire-resistant mica tape 21 keeps insulating under the high temperature state simultaneously, can not cause bigger conflagration because of the short circuit.
Example 3: on the basis of the embodiment 1, the description is made with reference to fig. 1 and 2, and the concentric conductor 4 is formed by twisting a plurality of copper wire cores, so that the concentric conductor formed by twisting a plurality of copper wire cores has better shielding effect.
Example 4: on the basis of the embodiment 1, the description is made with reference to fig. 1 and fig. 2, and the flame retardant armor layer 5 includes: the first flame retardant rubber layer 52 is wrapped with the first flame retardant rubber layer 52 in a coaxial manner outside the insulating shielding layer 3, a galvanized steel wire layer 51 is arranged in the first flame retardant rubber layer 52 in a coaxial manner, a plurality of concentric conductors 4 are arranged between the galvanized steel wire layer 51 and the outer wall of the first flame retardant rubber layer 52 in a circumferential array manner, and the flame retardant rubber of the flame retardant sheath layer ensures the speed of the flame to spread to the core wire core unit during flame combustion, and improves the flame retardant efficiency.
Example 5: on the basis of example 4, referring to fig. 1 and 2, the flame retardant sheath layer 6 includes: the second flame-retardant rubber layer 62, the outer coaxial parcel of flame-retardant armor 5 has second flame-retardant rubber layer 62, and coaxial in the second flame-retardant rubber layer 62 is provided with the rock wool layer 61 that goes out promptly from the fire, so set up, guaranteed through adding rock wool layer 61 that under the condition of no open flame, the cable can not continue burning.
Example 6: on the basis of example 5, referring to fig. 1 and 2, the first flame retardant rubber layer 52 and the second flame retardant rubber layer 62 are both polymers of halogen-free polyvinyl chloride and halogen-free nitrile rubber, and by the arrangement, the halogen-free polyvinyl chloride and halogen-free nitrile rubber polymers ensure that no harmful gas is generated during combustion, and meanwhile, the halogen-free nitrile rubber added with halogen-free polyvinyl chloride ensures flexibility and also generates fire resistance.
Example 7: on the basis of the embodiment 1, the explanation is made with reference to fig. 1, the wire core 1 is a silver-plated copper wire, and the thickness of the silver plating layer is 3-5 μm, so that the transmission effect is ensured and the cost is controlled by limiting the thickness of the silver plating layer.
The working process comprises the following steps:
the flame-retardant rubber of the flame-retardant sheath layer ensures the speed of spreading the temperature to the core wire core unit when the flame burns, improves the fire-resistant efficiency, adopts the rock wool of which the flame is extinguished when the flame burns and the flame burns, ensures that the ceramic polyethylene hydrocarbon insulating layer adopted by each wire core unit can not be encrusted when the flame burns and the high temperature is received, can not burn like crosslinked polyethylene, can still play an insulating effect after the encrusted, improves the fire resistance and corrosion resistance of each wire core unit by adding the fire-resistant mica tape between the conductor and the ceramic polyolefin insulating layer, ensures the normal transmission of current in the cable, and can not cause the fire or circuit fault caused by short circuit because of the conductor contact between the wire core units after corrosion.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. A concentric conductor low smoke zero halogen fire resistant power cable comprising: the cable core (1), the cable core (1) is coaxially wrapped with a flame-retardant insulating layer (2), and is characterized in that,
the coaxial core outside the fire-retardant insulating layer (2) is wrapped up in insulating shielding layer (3), and insulating shielding layer (3) outer circular array is provided with a plurality of concentric conductors (4), and insulating shielding layer (3) outer coaxial core parcel has fire-retardant armor (5), and concentric conductors (4) are arranged in fire-retardant armor (5), fire-retardant armor (5) outer coaxial core parcel has fire-retardant restrictive coating (6), fire-retardant insulating layer (2) with it has special magnesium oxide of electric wire and cable to fill between insulating shielding layer (3).
2. A concentric conductor low smoke zero halogen fire resistant power cable according to claim 1, characterized in that the flame retardant insulating layer (2) comprises: the cable comprises a fireproof mica layer (21) and a ceramic polyethylene hydrocarbon insulating layer (22), wherein the fireproof mica layer (21) is coaxially wrapped outside the cable core (1), and the ceramic polyethylene hydrocarbon insulating layer (22) forming a ceramic shell at a high temperature is coaxially wrapped outside the fireproof mica layer (21).
3. The concentric conductor low smoke zero halogen fire resistant power cable according to claim 1, wherein the concentric conductor (4) is formed by twisting a plurality of strands of copper wire cores.
4. A concentric conductor low smoke zero halogen fire resistant power cable according to claim 1, characterized in that the flame retardant armor layer (5) comprises: the insulating shielding layer (3) is wrapped with a first flame-retardant rubber layer (52) coaxially outside, a galvanized steel wire layer (51) is arranged coaxially inside the first flame-retardant rubber layer (52), and a plurality of concentric conductors (4) are arranged between the galvanized steel wire layer (51) and the outer wall of the first flame-retardant rubber layer (52) in a circumferential array.
5. A concentric conductor low smoke zero halogen fire resistant power cable according to claim 4, wherein the flame retardant jacket layer (6) comprises: the second flame-retardant rubber layer (62), the outer coaxial parcel of flame-retardant armor (5) has second flame-retardant rubber layer (62), and coaxial in second flame-retardant rubber layer (62) is provided with from fire rock wool layer (61) that goes out promptly.
6. The concentric conductor low smoke zero halogen fire resistant power cable according to claim 1, characterized in that the received core (1) is a silver coated copper wire, the silver coating thickness is 3-5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321060186.0U CN220306021U (en) | 2023-05-06 | 2023-05-06 | Low smoke zero halogen fire-resistant power cable of concentric conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321060186.0U CN220306021U (en) | 2023-05-06 | 2023-05-06 | Low smoke zero halogen fire-resistant power cable of concentric conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220306021U true CN220306021U (en) | 2024-01-05 |
Family
ID=89375314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321060186.0U Active CN220306021U (en) | 2023-05-06 | 2023-05-06 | Low smoke zero halogen fire-resistant power cable of concentric conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220306021U (en) |
-
2023
- 2023-05-06 CN CN202321060186.0U patent/CN220306021U/en active Active
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