CN211907041U - Moisture-proof low-voltage fireproof cable - Google Patents
Moisture-proof low-voltage fireproof cable Download PDFInfo
- Publication number
- CN211907041U CN211907041U CN202020374599.6U CN202020374599U CN211907041U CN 211907041 U CN211907041 U CN 211907041U CN 202020374599 U CN202020374599 U CN 202020374599U CN 211907041 U CN211907041 U CN 211907041U
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- China
- Prior art keywords
- layer
- moisture
- proof
- fireproof cable
- conductor
- 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.)
- Expired - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 18
- 239000004743 Polypropylene Substances 0.000 claims abstract description 15
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 12
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 12
- -1 polypropylene Polymers 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims abstract description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 8
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 7
- 239000008397 galvanized steel Substances 0.000 claims abstract description 7
- 239000010445 mica Substances 0.000 claims abstract description 6
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 6
- 229920000098 polyolefin Polymers 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 abstract description 4
- 150000002367 halogens Chemical class 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 4
- 230000009970 fire resistant effect Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 240000005572 Syzygium cordatum Species 0.000 description 3
- 235000006650 Syzygium cordatum Nutrition 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
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- Insulated Conductors (AREA)
Abstract
The utility model discloses a moisture-proof type low pressure fireproof cable, along four fan-shaped conductors of a galvanized steel monofilament center conductor peripheral symmetrical arrangement and constitute circular inner conductor, the outside cladding in proper order of circular inner conductor has dampproof course in the fluororubber, insulating layer, crosslinked polyethylene fire prevention area around covering, fire-resistant mica tape layer, separate oxygen layer, the outer dampproof course of fluororubber, polypropylene hygroscopic layer, shielding mesh conductor layer, PTFE around covering and low smoke and zero halogen polyolefin oversheath, fan-shaped conductor is that a plurality of copper strands twist again constitutes and sticiss into fan-shaped structure, the copper strands comprises a plurality of tin-plated copper monofilament bundle twists. The cable has excellent moisture-proof and fireproof performances, excellent insulating performance, stable electrical shielding performance, better laying environmental adaptability and improved safety and reliability.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a moisture-proof type low pressure fireproof cable.
Background
A large number of cables are applied in power construction, the cable has good insulating property, the power supply reliability can be improved, the appearance of the city is beautified, and the popularization and application values are higher. In the cable construction process, the phenomenon that the cable is affected with damp and enters water sometimes happens, and the potential hidden danger influencing the safe operation of the cable is formed. When the cable is laid, the cable often passes through roads, bridges and the like, and due to reasons such as weather and the like, moisture can not permeate into the cable, the water tree aging phenomenon can occur under the action of an electric field, the cable insulation is damaged, and finally the cable breakdown accident is caused. If the thickness of the cable insulating layer is only increased, the aging phenomenon of the water tree is delayed, and the temporary solution and the permanent solution are not treated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, the technical problem that solve provides a moisture-proof type low pressure fireproof cable, has excellent dampproofing fire behavior, and insulating properties is excellent, and electrical shielding performance is stable, lays environmental suitability better, improves the fail safe nature of cable.
The utility model discloses a make above-mentioned technical problem solve through following technical scheme.
Dampproofing type low pressure fireproof cable along four fan-shaped conductors of a galvanized steel monofilament center conductor peripheral symmetrical arrangement and constitute circular inner conductor, circular inner conductor outside cladding has in proper order that dampproof course, insulating layer, crosslinked polyethylene fire prevention area wind cladding, fire-resistant mica tape layer, oxygen barrier, the outer dampproof course of fluororubber, polypropylene hygroscopic layer, shielding mesh conductor layer, PTFE wind cladding and low smoke and zero halogen polyolefin oversheath, fan-shaped conductor is that a plurality of copper strands twist again constitutes and sticiss into fan-shaped structure, the copper strand comprises a plurality of tin-plated copper monofilament bundles.
Preferably, the thickness of the fluororubber inner moisture barrier and the fluororubber outer moisture barrier is 0.5mm to 2.5 mm.
Preferably, the insulating layer is a PP, EEA, EVA or EMA insulating layer.
Preferably, the diameter of the tin-plated copper monofilament is 0.02mm to 0.1 mm.
Preferably, the winding cladding of the crosslinked polyethylene fireproof belt is in a unidirectional spiral winding structure of the crosslinked polyethylene fireproof belt, and the spiral angle is 40-55 degrees.
Preferably, the oxygen isolation layer is formed by extruding ceramic silicon rubber oxygen isolation materials.
Preferably, the polypropylene moisture absorption layer is formed by lapping and wrapping a polypropylene winding belt on the fluororubber outer moisture-proof layer in a unidirectional spiral manner.
Preferably, the shielding mesh conductor layer is formed by spirally winding and weaving polyester fiber copper foil filaments and tin-plated copper monofilaments in opposite directions.
Preferably, the PTFE wrapping tape layer is a gap wrapping structure.
The utility model has the advantages that:
1. the moisture of polypropylene hygroscopic layer is effectively separated by the outer dampproof course of fluororubber, and the dampproof course separation moisture is to the insulating layer diffusion in the fluororubber simultaneously, has delayed the insulating layer greatly and has taken place the ageing phenomenon of water tree, has excellent electrical insulation characteristic, and voltage resistance is better, extension cable life, durable use.
2. After the temperature of the electrified cable rises, the linear expansion coefficient of the galvanized steel monofilament central conductor is smaller than that of the fan-shaped conductor, and the extension amount of the fan-shaped conductor is larger than that of the galvanized steel monofilament central conductor, so that the extension amount of the cable is balanced and absorbed, the extension force of a cable end is inhibited, and the adaptability of a laying environment is improved.
3. The outside cladding of inner conductor has crosslinked polyethylene fire prevention area around covering, fire-resistant mica tape layer, separate oxygen layer and low smoke and zero halogen polyolefin oversheath and form multilayer fire prevention and thermal-insulated effect, prolongs the time of heat-conduction to inner conductor, reduces the inside temperature of cable, improves the fail safe nature of cable.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.
In the figure: the cable comprises a galvanized steel monofilament central conductor, a 2-fan-shaped conductor, a 3-fluororubber inner moisture-proof layer, a 4-insulating layer, a 5-crosslinked polyethylene fireproof tape winding layer, a 6-fireproof mica tape layer, a 7-oxygen insulation layer, an 8-fluororubber outer moisture-proof layer, a 9-polypropylene moisture absorption layer, a 10-shielding mesh conductor layer, a 11-PTFE winding tape layer and a 12-low smoke zero halogen polyolefin outer sheath.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a moisture-proof type low pressure fireproof cable, along four fan-shaped conductors 2 of 1 peripheral symmetrical arrangement of galvanized steel monofilament center conductor and constitute circular inner conductor, fan-shaped conductor 2 is that the compound hank of a plurality of copper strands constitutes and sticiss into fan-shaped structure, the copper strand comprises a plurality of tin-plated copper monofilament bundles hank, and is further, the diameter of tin-plated copper monofilament is 0.02mm to 0.1 mm.
The circular inner conductor is externally and sequentially coated with a fluororubber inner moisture-proof layer 3, an insulating layer 4, a crosslinked polyethylene fireproof tape winding coating 5, a fireproof mica tape layer 6, an oxygen isolation layer 7, a fluororubber outer moisture-proof layer 8, a polypropylene moisture absorption layer 9, a shielding mesh conductor layer 10, a PTFE winding tape layer 11 and a low-smoke halogen-free polyolefin outer sheath 12. The thickness of the fluororubber inner moisture-proof layer 3 and the fluororubber outer moisture-proof layer 8 is 0.5mm to 2.5 mm. The insulating layer 4 may be a PP, EEA, EVA or EMA insulating layer. In one embodiment, the fire-retardant cross-linked polyethylene tape is wrapped around cladding 5 in a unidirectional spiral wrap of cross-linked polyethylene tape with a spiral angle of 40 to 55 degrees. The oxygen-isolating layer 7 is formed by extruding ceramic silicon rubber oxygen-isolating materials. In one embodiment, the polypropylene moisture absorption layer 9 is formed by wrapping a polypropylene winding tape on the fluororubber outer moisture-proof layer 8 in a unidirectional spiral overlapping manner. Preferably, the shielding mesh conductor layer 10 is formed by spirally winding and weaving polyester fiber copper foil filaments and tin-plated copper monofilaments in opposite directions. Preferably, the PTFE wrapping tape layer 11 is a gap wrapping structure.
While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.
Claims (9)
1. Moisture-proof type low pressure fireproof cable, characterized by: four fan-shaped conductors (2) are symmetrically arranged along the periphery of a galvanized steel monofilament central conductor (1) and form a circular inner conductor, the outside of the circular inner conductor is sequentially coated with a fluororubber inner moisture-proof layer (3), an insulating layer (4), a crosslinked polyethylene fireproof tape winding covering layer (5), a fireproof mica tape layer (6), an oxygen-isolating layer (7), a fluororubber outer moisture-proof layer (8), a polypropylene moisture-absorbing layer (9), a shielding mesh conductor layer (10), a PTFE winding covering layer (11) and a low-smoke halogen-free polyolefin outer sheath (12), the fan-shaped conductors (2) are formed by twisting a plurality of copper stranded wires and are tightly pressed into a fan-shaped structure, and the copper stranded wires are formed by twisting a plurality of tinned copper monofilament bundles.
2. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the thickness of the fluororubber inner moisture-proof layer (3) and the fluororubber outer moisture-proof layer (8) is 0.5mm to 2.5 mm.
3. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the insulating layer (4) is a PP, EEA, EVA or EMA insulating layer.
4. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the diameter of the tin-plated copper monofilament is 0.02mm to 0.1 mm.
5. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the cross-linked polyethylene fireproof belt winding cladding (5) is of a cross-linked polyethylene fireproof belt unidirectional spiral winding structure, and the spiral angle is 40-55 degrees.
6. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the oxygen isolation layer (7) is formed by extruding ceramic silicon rubber oxygen isolation materials.
7. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the polypropylene moisture absorption layer (9) is formed by lapping and wrapping a polypropylene winding belt on the fluororubber outer moisture-proof layer (8) in a unidirectional spiral manner.
8. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the shielding mesh-shaped conductor layer (10) is formed by spirally winding and weaving polyester fiber copper foil filaments and tin-plated copper monofilaments in opposite directions.
9. The moisture-proof low-voltage fireproof cable of claim 1, wherein: the PTFE winding band layer (11) is of a gap winding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374599.6U CN211907041U (en) | 2020-03-23 | 2020-03-23 | Moisture-proof low-voltage fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374599.6U CN211907041U (en) | 2020-03-23 | 2020-03-23 | Moisture-proof low-voltage fireproof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211907041U true CN211907041U (en) | 2020-11-10 |
Family
ID=73268378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020374599.6U Expired - Fee Related CN211907041U (en) | 2020-03-23 | 2020-03-23 | Moisture-proof low-voltage fireproof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211907041U (en) |
-
2020
- 2020-03-23 CN CN202020374599.6U patent/CN211907041U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |