CN221261976U - B (B)1Flexible mineral insulated cable of level - Google Patents
B (B)1Flexible mineral insulated cable of levelInfo
- Publication number
- CN221261976U CN221261976U CN202323246649.5U CN202323246649U CN221261976U CN 221261976 U CN221261976 U CN 221261976U CN 202323246649 U CN202323246649 U CN 202323246649U CN 221261976 U CN221261976 U CN 221261976U
- Authority
- CN
- China
- Prior art keywords
- insulated cable
- mineral insulated
- layer
- flame
- retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 37
- 239000011707 mineral Substances 0.000 title claims abstract description 37
- 239000003063 flame retardant Substances 0.000 claims abstract description 40
- 239000010410 layer Substances 0.000 claims abstract description 35
- 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 32
- 239000011241 protective layer Substances 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 239000000779 smoke Substances 0.000 claims description 14
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920002397 thermoplastic olefin Polymers 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 5
- 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 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Abstract
The utility model discloses a B 1 -level flexible mineral insulated cable which comprises a plurality of wire cores and a sheath for wrapping the wire cores, wherein the structure of each wire core is sequentially provided with a conductor, a protective layer, a mineral insulating layer and an inner protective layer from inside to outside, a filler is arranged in a gap between each wire core and each wire core, and the sheath is sequentially provided with a flame retardant belt, a copper sheath, a fire-proof layer and an outer protective layer from inside to outside. The utility model has reasonable structural design and has the following beneficial effects: the conductor adopts stranded copper stranded wires, the insulation adopts high temperature resistant synthetic mica tape to mechanically wrap, and the insulation layer adopts high flame retardant filler to densely fill. Compared with the prior mineral insulated cable, the cable has the advantages that the cable maintains the high fireproof characteristic, can be continuously long, can be made into multi-core grouped cables within 240mm 2, and overcomes the defects of excessive joints and overlarge construction difficulty.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a B 1 -level flexible mineral insulated cable.
Background
The power cable is a cable for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station outgoing lines, power supply in industrial and mining enterprises and power transmission lines under sea water passing through the river. In the electric power line, the proportion of the cable is gradually increasing. Power cables are cable products used in the main line of power systems to transmit and distribute high power electrical energy, including various voltage classes of 1-500kV and above, various insulated power cables.
A mineral insulated cable (Mineral insulated cable) is a cable which uses a copper sheath to wrap a copper conductor core wire and uses magnesium oxide powder as an inorganic insulating material to isolate the conductor from the sheath, and the outermost layer can be selected as appropriate to be protected. Mineral insulated cables have excellent fire resistance properties, but rigid mineral cables cannot be produced for a long time due to process limitations.
Disclosure of utility model
The utility model aims to provide a B 1 -level flexible mineral insulated cable, which overcomes the defect of limited production length of the mineral insulated cable and avoids the problem of an intermediate joint in installation and laying.
In order to achieve the above purpose, the technical scheme of the utility model provides a B 1 -level flexible mineral insulated cable, which comprises a plurality of wire cores and a sheath for wrapping the wire cores, wherein the wire cores are sequentially provided with conductors, protective layers, mineral insulating layers and inner protective layers from inside to outside, filling materials are arranged in gaps between the wire cores, and the sheath is sequentially provided with a flame retardant belt, a copper sheath, a fire-proof layer and an outer protective layer from inside to outside.
Further, the number of the wire cores is 5.
Further, the cross section formed by combining the wire core and the filler is a circular cross section.
Further, the conductor is formed by twisting a plurality of copper wires.
Further, the protective layer is a polyester tape layer, and the mineral insulating layer is a mica tape layer.
Further, the inner protective layer is PETD insulating paper layers.
Further, the filler is a high flame retardant filler rope.
Further, the flame-retardant belt is a low-smoke halogen-free high-flame-retardant belt.
Further, the fire-proof layer is a low-smoke halogen-free flame-retardant glass fiber cloth belt.
Further, the outer protective layer is a halogen-free low-smoke flame-retardant B 1 -grade thermoplastic polyolefin sheath layer.
In summary, the device provided by the utility model has reasonable structural design, and has the following beneficial effects by applying the technical scheme of the utility model: the conductor adopts stranded copper stranded wires, the insulation adopts high temperature resistant synthetic mica tape to mechanically wrap, the insulating layer adopts high flame retardant filler to densely fill, the copper sheath adopts a copper strip argon arc welding and binding mode, and the copper sheath has good air tightness. Compared with the prior mineral insulated cable, the cable has the advantages that the cable maintains the high fireproof characteristic, can be continuously long, can be made into multi-core grouped cables within 240mm 2, and overcomes the defects of excessive joints and overlarge construction difficulty.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
Reference numerals illustrate: 1-conductors; 2-a protective layer; 3-a mineral insulating layer; 4-an inner protective layer; 5-filling; 6-a flame retardant tape; 7-copper sheath; 8-a fire barrier; 9-an outer protective layer.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, but the scope of protection of the present utility model is not limited.
In the present utility model, for a clearer description, the following description is made: the observer views fig. 1 with the front left side of the observer set to the front, the rear right side of the observer set to the rear, the rear left side of the observer set to the left, the front right side of the observer set to the right, the upper side of the observer set to the upper side, and the lower side of the observer set to the lower side, and it should be noted that the terms "front end", "rear end", "left side", "right side", "middle", "upper", "lower", etc. in this text indicate orientations or positional relationships based on the orientations or positional relationships set in the drawings, and are merely for convenience of clearly describing the present utility model, but do not indicate or imply that the structures or components to be referred to must have specific orientations, be constructed in specific orientations, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth" and the like are used for clarity or to simplify the description, and are not to be construed as indicating or implying a relative importance or quantity.
Referring to fig. 1, the utility model provides a B 1 -level flexible mineral insulated cable, which comprises a plurality of wire cores and a sheath for wrapping the wire cores, wherein the wire cores are sequentially provided with a conductor 1, a protective layer 2, a mineral insulating layer 3 and an inner protective layer 4 from inside to outside, filler 5 is arranged in a gap between each wire core and each wire core, and the sheath is sequentially provided with a flame retardant belt 6, a copper sheath 7, a fire-retardant layer 8 and an outer protective layer 9 from inside to outside.
The conductor 1 adopts a plurality of copper strands, the insulation adopts a high-temperature resistant synthetic mica tape for mechanical wrapping, the insulation layer is densely filled with a high-flame-retardant filler, and the copper sheath adopts a copper strip argon arc welding and embossing mode, so that the conductor has good air tightness. Compared with the prior mineral insulated cable, the cable has the advantages that the cable maintains the high fireproof characteristic, can be continuously long, can be made into multi-core grouped cables within 240mm 2, and overcomes the defects of excessive joints and overlarge construction difficulty. The copper sheath 7 adopts an argon arc welding and embossing mode, has a water blocking effect and good bending property, can be used as a PE wire, increases the mechanical strength of the cable, improves the corrosion resistance, increases the tensile strength and the compressive strength, and prolongs the service life of the mechanical protection.
As a preferred embodiment of the present utility model, the number of the wire cores is 5, and the cross section formed by combining the wire cores and the filler 5 is a circular cross section.
As a preferred embodiment of the present utility model, the conductor 1 is formed by twisting a plurality of copper wires, and has good bending characteristics.
As a preferred embodiment of the utility model, the protective layer 2 is a polyester tape layer and the mineral insulating layer 3 is a mica tape layer. The protective layer 2 is wrapped by a polyester tape, so that the wire core is effectively isolated and protected from being damaged. The mineral insulating layer 3 is overlapped and wrapped by adopting a synthetic mica tape, has high heat-resistant grade and can reach the A-grade fire-resistant level (950-1000 ℃).
Specifically, the inner protective layer 4 is PETD insulating paper layers, and PETD insulating paper is adopted for overlapping wrapping, so that the cable has good mechanical and electrical properties, and the insulating properties are effectively achieved and the cable cores are protected from being damaged.
Specifically, the filler 5 is a highly flame retardant filler rope. The high-flame-retardant filling rope has excellent electrical performance, ageing resistance, long service life and excellent flame retardance.
Specifically, the flame-retardant belt 6 is a low-smoke halogen-free high-flame-retardant belt, and the low-smoke halogen-free high-flame-retardant belt is overlapped and wrapped, so that a large amount of heat energy can be absorbed in the combustion process, a carbon shell layer is formed, air is blocked, the cable is prevented from further combustion, and the effects of fire and oxygen isolation are effectively achieved.
Specifically, the fire-proof layer 8 is a low-smoke halogen-free flame-retardant glass fiber cloth belt, the low-smoke halogen-free flame-retardant glass fiber cloth belt is adopted to be overlapped and wrapped, a metal hydrate component is added in the material, the toughness is high, the fire-proof, heat-absorbing and oxygen-proof belt is integrated, the high flame retardance of the low-smoke halogen-free flame-retardant cable is realized, and the flame retardance of the cable can be effectively improved.
Specifically, the outer protective layer 9 is a halogen-free low-smoke flame-retardant B 1 -level thermoplastic polyolefin sheath layer, a halogen-free low-smoke flame-retardant B 1 -level thermoplastic polyolefin sheath material is adopted, the B 1 -level heat sheath material is a flame-retardant material and has a good flame-retardant effect, and the sheath material adopts metal hydrates such as magnesium hydroxide, aluminum hydroxide and the like to replace the traditional filler, so that the crystallization water is released in the combustion process of the cable, the flame temperature of the cable is reduced, and the heat brought by continuous combustion of the flame is prevented. The material not only ensures the flame spreading height, but also can well control the total amount of smoke generation and the burning speed to the minimum, and is an energy-saving flame-retardant environment-friendly product.
The utility model is an improved fireproof cable based on the problem that the production length of the mineral insulated cable is limited, and the unique cable structure enables the defect that the production length of the mineral insulated cable is limited to be overcome, the problem of an intermediate joint in installation and laying is avoided, and the fireproof cable has the advantages of insusceptibility to damp of an insulating layer, convenience in installation and laying, fire resistance, water resistance, explosion resistance, corrosion resistance, mechanical damage resistance, long service life, large cutoff amount, good safety performance and the like. Meanwhile, the biggest difference between the flame-retardant combustion performance grade B 1 cable and the general flame-retardant cable structural design is that the flame-retardant combustion performance grade B 1 cable has an alkali-free glass fiber flame-retardant layer, and once the cable is ignited between the wire core and the outer sheath, external oxygen and the cable wire core are isolated from participating in combustion, and the flame-retardant combustion performance grade B 1 cable becomes a barrier for blocking heat oxygen, so that the flame-retardant combustion performance grade B 1 cable has higher flame-retardant and flame-retardant capabilities. The B 1 -level mineral insulated cable is widely used in places with dense population, such as high-rise buildings, airports, tunnels, markets, hospitals and the like, and places needing special protection.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.
Claims (10)
1. The utility model provides a flexible mineral insulated cable of B 1 level, includes a plurality of sinle silk and is used for wrapping up the sheath of sinle silk, its characterized in that: the structure of sinle silk has set gradually conductor, inoxidizing coating, mineral insulating layer, interior protective layer from inside to outside, be equipped with the filler in the space between sinle silk and the sinle silk, the sheath has set gradually fire-retardant area, copper sheath, fire-proof layer, outer protective layer from inside to outside.
2. A B 1 grade flexible mineral insulated cable according to claim 1, wherein: the number of the wire cores is 5.
3. A B 1 grade flexible mineral insulated cable according to claim 1 or 2, characterised in that: the cross section formed by combining the wire core and the filler is a circular cross section.
4. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the conductor is formed by twisting a plurality of strands of copper wires.
5. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the protective layer is a polyester tape layer, and the mineral insulating layer is a mica tape layer.
6. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the inner protective layer is PETD insulating paper layers.
7. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the filler is a high flame-retardant filling rope.
8. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the flame-retardant belt is a low-smoke halogen-free high-flame-retardant belt.
9. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the fire-proof layer is a low-smoke halogen-free flame-retardant glass fiber cloth belt.
10. A B 1 grade flexible mineral insulated cable according to claim 3, wherein: the outer protective layer is a halogen-free low-smoke flame-retardant B 1 -level thermoplastic polyolefin sheath layer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023224512932 | 2023-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221261976U true CN221261976U (en) | 2024-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |