CN219512863U - Medium-voltage fireproof cable - Google Patents
Medium-voltage fireproof cable Download PDFInfo
- Publication number
- CN219512863U CN219512863U CN202320432678.1U CN202320432678U CN219512863U CN 219512863 U CN219512863 U CN 219512863U CN 202320432678 U CN202320432678 U CN 202320432678U CN 219512863 U CN219512863 U CN 219512863U
- Authority
- CN
- China
- Prior art keywords
- layer
- medium voltage
- shielding layer
- wrapping
- fire resistant
- 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
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims description 28
- 229920002379 silicone rubber Polymers 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 12
- 238000010070 extrusion (rubber) Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 7
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010445 mica Substances 0.000 claims description 6
- 229910052618 mica group Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 5
- 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 4
- 229920000742 Cotton Polymers 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 3
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001681 protective effect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 96
- 239000004945 silicone rubber Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000035939 shock Effects 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 discloses a medium-voltage fire-resistant cable, which comprises a cable core, wherein the cable core comprises a plurality of wires; the wire comprises a conductor, a co-extrusion insulating shielding layer, a metal shielding layer, a fire-resistant layer and an inner sheath; the outer side of the cable core is sequentially provided with a wrapping layer, an oxygen isolation layer, a wrapping layer and an outer sheath from inside to outside; and a filling material is arranged in a gap between the inner sheath and the wrapping layer. Through improving the structure of the medium-voltage cable, the periphery of a cable core formed by a fireproof layer and a plurality of wires is provided with an oxygen isolation layer and an outer sheath, and excellent fireproof and oxygen isolation effects are formed through the combination of a plurality of protective structures; the co-extrusion insulating shielding layer is formed in a multi-layer co-extrusion mode, so that the anti-electromagnetic interference capability is improved, and the use requirement under extreme conditions is met.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a medium-voltage fire-resistant cable.
Background
At present, fire-resistant cable products of various materials and structures are layered endlessly, various fire-resistant cable product standards and method standards are continuously promoted, but the fire-resistant cable is mainly concentrated in the low-voltage field with the rated voltage of 0.6/1kV and below, and with the improvement of fire-fighting consciousness and the importance of safety and environmental protection concepts of people, the fire-resistant cable with the voltage level can not meet the market demands. For medium voltage fire-resistant cable products with rated voltage of 6-35 kV, the national and industry standards and corresponding test method standards are lacking at present, and the foreign countries have no similar product standards and test method standards, so that the quality of the medium voltage fire-resistant cable products is good and uneven, and the fire resistance, the electromagnetic interference resistance and the insulation of part of the medium voltage fire-resistant cable are poor, so that the requirements of people cannot be met, and the use of people is not facilitated.
Disclosure of Invention
The utility model provides a medium voltage fire-resistant cable to solve the problems set forth in the background art. In order to achieve the above purpose, the present utility model provides the following technical solutions: the medium voltage fire-resistant cable comprises a cable core, wherein the cable core comprises a plurality of wires; the wire comprises a conductor, wherein the outer side of the conductor is sequentially coated with a co-extrusion insulating shielding layer, a metal shielding layer, a fire-resistant layer and an inner sheath from inside to outside; the outer side of the cable core is sequentially provided with a wrapping layer, an oxygen isolation layer, a wrapping layer and an outer sheath from inside to outside; and a filling material is arranged in a gap between the inner sheath and the wrapping layer.
Preferably, the co-extrusion insulating shielding layer comprises an inner shielding layer, an insulating layer and an outer shielding layer from inside to outside, wherein the inner shielding layer and the outer shielding layer are both semiconductive polypropylene shielding layers, and the insulating layer is a crosslinked polyethylene insulating layer.
Preferably, the refractory layer comprises a ceramic silicon rubber extrusion layer and a ceramic silicon rubber winding layer, the ceramic silicon rubber extrusion layer is arranged on the periphery of the metal shielding layer in an extrusion mode, and the ceramic silicon rubber winding layer is arranged on the periphery of the ceramic silicon rubber extrusion layer in a wrapping mode.
Preferably, the wrapping layer is formed by wrapping a multi-layer ceramic silica gel composite belt.
Preferably, the filler is an inorganic mineral, and a high-strength cotton rope is arranged in the filler.
Preferably, the oxygen barrier layer is made of a high flame retardant polyolefin material and contains hydrated oxide, and the thickness of the oxygen barrier layer is 1-1.5 mm.
Preferably, the wrapping tape layer is a glass fiber tape, and the glass fiber tape is wound and attached on the oxygen isolation layer in a lap joint mode.
Preferably, the mica tape layer is also included, and the mica tape layer is wound and stuck on the wrapping tape layer in an overlapped winding manner.
Preferably, the outer sheath is made of a low-smoke halogen-free flame retardant polyolefin material.
Preferably, the metal shielding layer is formed by winding steel wires, steel belts or brass belts; and an anti-puncture layer is arranged on the inner side of the metal shielding layer.
Compared with the prior art, the utility model has the beneficial effects that: in the embodiment, the structure of the medium-voltage cable is improved, the fireproof layer is arranged on the periphery of the conductor, the oxygen isolating layer and the outer sheath are arranged on the periphery of the cable core formed by a plurality of wires, and excellent fireproof and oxygen isolating effects are formed through the combination of a plurality of protective structures; the co-extrusion insulating shielding layer is formed in a multi-layer co-extrusion mode, so that the anti-electromagnetic interference capability is improved, and the use requirement under extreme conditions is met.
Drawings
FIG. 1 is a block diagram of a medium voltage fire resistant cable according to an embodiment of the present utility model;
in fig. 1, the correspondence between the names of the components and the reference numerals is:
1-conductor, 2-co-extrusion insulating shielding layer, 21-inner shielding layer, 22-insulating layer, 23-outer shielding layer, 3-metal shielding layer, 4-fire-resistant layer, 5-inner sheath, 6-wrapping layer, 7-oxygen-isolating layer, 8-wrapping layer, 9-outer sheath, 10-filler and 11-mica tape layer.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the utility model provides a medium voltage fire-resistant cable, which comprises a cable core, wherein the cable core comprises a plurality of wires; the wire comprises a conductor 1, wherein the outer side of the conductor 1 is sequentially coated with a co-extrusion insulating shielding layer 2, a metal shielding layer 3, a fire-resistant layer 4 and an inner sheath 5 from inside to outside; the outer side of the cable core is sequentially provided with a wrapping layer 6, an oxygen isolation layer 7, a wrapping layer 8 and an outer sheath 9 from inside to outside; a filler 10 is arranged in the gap between the inner sheath 5 and the wrapping layer 6.
In this embodiment, by improving the structure of the medium voltage cable, the fire-resistant layer 4 is arranged at the periphery of the conductor 1, the oxygen-insulating layer 7 and the outer sheath 9 are arranged at the periphery of the cable core formed by a plurality of wires, and excellent fire resistance and oxygen-insulating effects are formed by combining various protective structures, so that when the external flame temperature reaches 750-800 ℃, the internal temperature of the cable core is lower than 300 ℃. Through setting up around covering 6 and band layer 8, further promote fire-resistant thermal-insulated effect, around covering 6 and band layer 8 can adopt ceramic silicon rubber material, and ceramic silicon rubber forms hard ceramic's armor protective layer under the high temperature condition, can play isolated flame, fire prevention, insulation, thermal-insulated, water proof, shock-resistant effect to guaranteed under the conflagration circumstances, electric power, the unblocked of communication.
Preferably, the co-extruded insulating shielding layer 2 includes an inner shielding layer 21, an insulating layer 22 and an outer shielding layer 23 from inside to outside, the inner shielding layer 21 and the outer shielding layer 23 are both semiconductive polypropylene shielding layers, and the insulating layer 22 is a crosslinked polyethylene insulating layer 22.
Preferably, the refractory layer 4 includes a ceramic silicone rubber extrusion layer and a ceramic silicone rubber winding layer, the ceramic silicone rubber extrusion layer is disposed on the periphery of the metal shielding layer 3 in an extrusion manner, and the ceramic silicone rubber winding layer is disposed on the periphery of the ceramic silicone rubber extrusion layer in a wrapping manner. In the embodiment, the main materials in the ceramic silicone rubber extrusion layer and the ceramic silicone rubber winding layer are ceramic silicone rubber, when the cable burns due to fire, the ceramic silicone rubber forms a compact ceramic structure, and a hard ceramic shell can be formed after high-temperature combustion so as to achieve the effects of heat insulation and fire resistance, and the circuit is protected. The longer the ablation time during the cable burning, the harder the ceramic shell, which gives the refractory layer 4 of the present embodiment excellent fire-insulating effect.
Preferably, the wrapping layer 6 is formed by wrapping a multi-layer ceramic silica gel composite belt.
Preferably, the filler 10 is an inorganic mineral, and a high-strength cotton rope is provided in the filler 10. Through setting up high strength cotton rope, can promote the tensile performance of pulling of cable, promote the structural strength of cable.
Preferably, the oxygen barrier layer 7 is made of a high flame retardant polyolefin material, which contains hydrated oxide and has a thickness of 1 to 1.5mm. In this embodiment, the oxygen barrier layer 7 includes a large amount of hydrated oxide, and the hydrated oxide has a function of generating crystal water when it is heated and contacts with oxygen to generate decomposition reaction, thereby forming water vapor. The water molecules evaporate, so that a large amount of heat can be absorbed, and the temperature of the cable is reduced. The oxygen barrier layer 7 of highly flame retardant polyolefin material helps to prevent flame propagation.
Preferably, the wrapping band layer 8 is a glass fiber band, and the glass fiber band is wound and attached on the oxygen isolation layer 7 in a lap joint manner.
Preferably, the mica tape layer 11 is also included, and the mica tape layer 11 is wound and stuck on the tape layer 8 in an overlapped winding manner.
Preferably, the outer sheath 9 is made of a low smoke halogen-free flame retardant polyolefin material.
Preferably, the metal shielding layer 3 is formed by winding steel wires, steel belts or brass belts; the inner side of the metal shielding layer 3 is provided with a puncture-proof layer.
Compared with the prior art, the utility model has the beneficial effects that: in the embodiment, the structure of the medium-voltage cable is improved, the fireproof layer is arranged on the periphery of the conductor, the oxygen isolating layer and the outer sheath are arranged on the periphery of the cable core formed by a plurality of wires, and excellent fireproof and oxygen isolating effects are formed through the combination of a plurality of protective structures; the co-extrusion insulating shielding layer is formed in a multi-layer co-extrusion mode, so that the anti-electromagnetic interference capability is improved, and the use requirement under extreme conditions is met.
The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. The medium voltage fire-resistant cable is characterized by comprising a cable core, wherein the cable core comprises a plurality of wires; the wire comprises a conductor (1), wherein the outer side of the conductor is sequentially coated with a co-extrusion insulating shielding layer (2), a metal shielding layer (3), a fire-resistant layer (4) and an inner sheath (5) from inside to outside; the outer side of the cable core is sequentially provided with a wrapping layer (6), an oxygen isolation layer (7), a wrapping belt layer (8) and an outer sheath (9) from inside to outside; and a filling material (10) is arranged in a gap between the inner sheath and the wrapping layer.
2. The medium voltage fire resistant cable according to claim 1, wherein the co-extruded insulating shielding layer comprises an inner shielding layer (21), an insulating layer (22) and an outer shielding layer (23) from inside to outside, wherein the inner shielding layer and the outer shielding layer are semiconductive polypropylene shielding layers, and the insulating layer is a crosslinked polyethylene insulating layer.
3. The medium voltage fire resistant cable according to claim 1, wherein the fire resistant layer comprises a ceramic silicon rubber extrusion layer and a ceramic silicon rubber winding layer, the ceramic silicon rubber extrusion layer is arranged on the periphery of the metal shielding layer in an extrusion mode, and the ceramic silicon rubber winding layer is arranged on the periphery of the ceramic silicon rubber extrusion layer in a wrapping mode.
4. The medium voltage fire resistant cable according to claim 1, wherein the wrapping layer is formed by wrapping a multilayer ceramic silica gel composite tape.
5. The medium voltage fire resistant cable according to claim 1, wherein the filler is an inorganic mineral and a high strength cotton rope is provided in the filler.
6. The medium voltage fire resistant cable according to claim 5, characterized in that the oxygen barrier layer is made of a highly flame retardant polyolefin material containing hydrated oxides with a thickness of 1 to 1.5mm.
7. The medium voltage fire resistant cable according to claim 1 wherein the tape layer is a glass fiber tape wrapped around and attached to the oxygen barrier layer in a lap joint.
8. Medium voltage fire resistant cable according to claim 7, characterized in that it further comprises a mica tape layer (11) wound and glued in superimposed winding on the tape layer.
9. The medium voltage fire resistant cable according to claim 1, wherein the outer sheath is made of a low smoke halogen free flame retardant polyolefin material.
10. The medium voltage fire resistant cable according to anyone of claims 1 to 9, characterized in that the metallic shielding layer is wound from steel wire, steel strip or brass strip; and an anti-puncture layer is arranged on the inner side of the metal shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320432678.1U CN219512863U (en) | 2023-03-08 | 2023-03-08 | Medium-voltage fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320432678.1U CN219512863U (en) | 2023-03-08 | 2023-03-08 | Medium-voltage fireproof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512863U true CN219512863U (en) | 2023-08-11 |
Family
ID=87525922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320432678.1U Active CN219512863U (en) | 2023-03-08 | 2023-03-08 | Medium-voltage fireproof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219512863U (en) |
-
2023
- 2023-03-08 CN CN202320432678.1U patent/CN219512863U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204632362U (en) | A kind of naval vessel fireproof cable | |
| CN213092879U (en) | Medium-voltage fire-resistant power cable | |
| CN219512863U (en) | Medium-voltage fireproof cable | |
| CN212032737U (en) | Extruded insulation fire-resistant cable | |
| CN109494009A (en) | It is a kind of intelligence minerals in pressure fire prevention from monitoring cable | |
| CN219143854U (en) | Environment-friendly medium-voltage flame-retardant fire-resistant cable | |
| CN217280178U (en) | Medium-voltage fire-resistant cable | |
| CN216487387U (en) | Fireproof railway digital signal cable | |
| CN213781625U (en) | Compound insulating flexible fireproof cable | |
| CN212411653U (en) | Mineral insulated cable with fire-resistant embossing aluminum sheath | |
| CN212061919U (en) | Water-blocking fireproof special cable | |
| CN112071491B (en) | Medium-voltage fireproof cable and preparation method thereof | |
| CN210295997U (en) | Medium-voltage fireproof power cable | |
| CN211125138U (en) | Fire-resistant and flame-retardant cable | |
| CN216772899U (en) | Novel medium-voltage fireproof cable | |
| CN119092199B (en) | Fire-resistant cable | |
| CN217134061U (en) | Fire-resistant flame retarded cable of crosslinked polyethylene | |
| CN218497841U (en) | High-rise building lays perpendicularly with fire-retardant B1 level middling pressure fire resisting cable | |
| CN222394608U (en) | cable | |
| CN215933253U (en) | Novel B1-grade halogen-free low-smoke flame-retardant fire-resistant control cable | |
| CN211858244U (en) | Low-smoke, low-toxicity and mechanical impact resistant power cable of 3KV and below | |
| CN221225881U (en) | Novel high fire-retardant railway signal cable that can bear or endure fire | |
| CN220367762U (en) | High-performance fireproof cable | |
| CN210516296U (en) | Fire-resistant and flame-retardant ceramicized control cable | |
| CN203013357U (en) | Low-smoke halogen-free five core fire-resisting cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |