CN220189308U - High-strength anti-corrosion aluminum alloy core low-voltage power cable - Google Patents
High-strength anti-corrosion aluminum alloy core low-voltage power cable Download PDFInfo
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- CN220189308U CN220189308U CN202321776165.9U CN202321776165U CN220189308U CN 220189308 U CN220189308 U CN 220189308U CN 202321776165 U CN202321776165 U CN 202321776165U CN 220189308 U CN220189308 U CN 220189308U
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- aluminum alloy
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- 238000005260 corrosion Methods 0.000 title claims abstract description 41
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 18
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 46
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 24
- 230000007797 corrosion Effects 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 16
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims abstract description 6
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 6
- 229920002635 polyurethane Polymers 0.000 claims abstract description 6
- 239000004814 polyurethane Substances 0.000 claims abstract description 6
- 239000000565 sealant Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 36
- -1 polytetrafluoroethylene Polymers 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 3
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 8
- 238000005452 bending Methods 0.000 abstract description 6
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- 230000000694 effects Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
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- 235000002639 sodium chloride Nutrition 0.000 description 1
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Abstract
The utility model provides a high-strength anti-corrosion aluminum alloy core low-voltage power cable, which comprises a conductor, wherein a 35kV ultra-clean ethylene propylene rubber insulating layer is extruded outside the conductor to form an insulating wire core; twisting a plurality of insulating wire cores into a cable core, and filling corrosion-resistant sealant in the gaps of the cable core; overlapping and wrapping high-strength low-density PTFE wrapping tape outside the cable core, wherein the overlapping rate is more than or equal to 75%; and (3) wrapping a smooth metal plastic composite belt after a plurality of aramid fiber reinforced cores are distributed around the outer periphery of the high-strength low-density PTFE wrapping belt, and extruding a polyurethane elastic outer sheath outside the smooth metal plastic composite belt. The utility model solves the problems of poor corrosion resistance, low strength and the like of the existing low-voltage power cable, greatly enhances the performances of impact resistance, fracture resistance, bending resistance, tensile strength and the like of the whole cable, and ensures that the cable has the advantages of oil resistance, corrosion resistance, wear resistance, low temperature resistance, aging resistance, high hardness, elasticity and good chemical stability.
Description
Technical Field
The utility model relates to the field of wires and cables, in particular to a high-strength anti-corrosion aluminum alloy core piezoelectric cable.
Background
The international market research institute Zion has recently issued a research report that the annual composite growth rate of global voltage power cables in the market is 6.3% in 2017-2022. The low-voltage cable and accessories are main components of a power transmission and distribution system and can be installed overhead or underground. Is commonly used for 50-1000V alternating current voltage and 75-1500V direct current voltage equipment application. As renewable energy power increases, the urbanization and industrialization processes are accelerated and the popularity of smart grids will further promote global low voltage power demand growth, and the power demand increase and rural electrification processes in developing countries are major factors in promoting the development of the low voltage cable market. As power demands continue to increase, distribution foundations include substations, main feeders, distribution transformers, etc., which all require voltage cables to make the connection. Worldwide, the demands in three areas of power generation, transmission and distribution are increasing due to the rapid increase in global power demand. Therefore, the demand of the low-voltage power cable in the field of power transmission and distribution will maintain a steadily increasing situation in the future.
In recent years, the air pollution is aggravated nationwide, and the acid gas pollution, sea salt climate and other climatic conditions aggravate the corrosion of cables, so that the transmission safety is affected; the requirements and requirements for the low-voltage power cable are continuously improved, the cable is installed by adopting different laying modes according to different geographic positions and purposes of the cable application, the mechanical properties and the corrosion resistance of the cable are required among different laying modes, and particularly in places with higher environmental corrosiveness, the outer layer of the cable is easy to corrode, the integrity of the cable is damaged, the transmission effect of the cable is reduced, and safety accidents are generated; many existing cables adopt polytetrafluoroethylene films to realize acid and alkali resistance, but because the inside and the surface of the existing polytetrafluoroethylene films are provided with a large number of irregular micropores, the microporous polytetrafluoroethylene materials have poor tensile strength and poor compression resistance, so that accidents such as deformation, fracture and the like are easy to occur when the cables are wrapped, and the problems of great influence on the cables are caused; meanwhile, the general low-voltage power cable is single in structure, the cable strength is insufficient, the internal structure of the cable is easily damaged when the external force is encountered, and the normal operation and use of the cable are affected, so that the high-voltage power cable is required to have good mechanical properties and cable strength.
Disclosure of Invention
The utility model aims to solve the problems of the prior art, and provides a high-strength anti-corrosion aluminum alloy core low-voltage power cable which solves the problems of poor corrosion resistance, low strength and the like of the existing low-voltage power cable.
The utility model relates to a high-strength anti-corrosion aluminum alloy core low-voltage power cable, which comprises a conductor, wherein a 35kV ultra-clean ethylene propylene rubber insulating layer is extruded outside the conductor to form an insulating wire core; twisting a plurality of insulating wire cores into a cable core, and filling corrosion-resistant sealant in the gaps of the cable core; overlapping and wrapping high-strength low-density PTFE wrapping tape outside the cable core, wherein the overlapping rate is more than or equal to 75%; and (3) wrapping a smooth metal plastic composite belt after a plurality of aramid fiber reinforced cores are distributed around the outer periphery of the high-strength low-density PTFE wrapping belt, and extruding a polyurethane elastic outer sheath outside the smooth metal plastic composite belt.
Preferably, the conductor is a class 2 stranded conductor compliant with the GB/T3956-2008 standard.
Preferably, the middle of the high-strength low-density PTFE wrapping tape is a PTFE microporous fiber layer which is not completely sintered, and the upper side and the lower side of the PTFE microporous fiber layer are polytetrafluoroethylene film layers which are completely sintered.
Preferably, the thickness of the PTFE microporous fiber layer which is not completely sintered is 1-2mm.
Preferably, the thickness of the fully sintered polytetrafluoroethylene film layer is 2-4mm.
Preferably, the smooth metal plastic anti-corrosion composite belt comprises a metal layer, wherein a plastic film is stuck on one surface of the metal layer, and an epoxy anti-corrosion coating layer is coated on the other surface of the metal layer.
Preferably, the plastic film is a biaxially oriented polypropylene film.
Preferably, the metal layer is a steel belt, an aluminum belt or a stainless steel belt.
Preferably, the thickness of the epoxy anticorrosive paint layer is 1-2mm.
Compared with the prior art, the utility model has the beneficial effects that:
1. the conductor adopts a class 2 stranded conductor conforming to the GB/T3956-2008 standard, in particular to a medium-strength aluminum alloy (LHA 4) wire with a molded line structure, which can greatly reduce the direct current resistance of the conductor at 20 ℃, achieve the energy-saving effect and remarkably improve the mechanical property and the anti-icing overload capacity of the high overhead insulated cable;
2. the 35kV ultra-clean ethylene propylene rubber insulating layer is adopted, so that the cable has higher heat resistance level, can bear larger current load, has better heat and oxygen aging resistance and ozone aging resistance, and has longer service life and reliability;
3. the high-strength low-density PTFE wrapping tape is adopted, and the structure of the microporous membrane is changed, so that the high-strength low-density PTFE wrapping tape has better tensile strength, elongation at break and compression resistance than the common low-density microporous polytetrafluoroethylene film under the condition of keeping lower dielectric constant and dielectric loss than polytetrafluoroethylene raw material tapes, the tensile strength, elongation at break and compression resistance of the cable are further improved, and the problems that the tensile strength of the microporous polytetrafluoroethylene material is poor and the compression resistance is poor, so that accidents such as deformation and fracture easily occur when the cable is wrapped and the cable is greatly influenced are solved due to the fact that a large number of irregular micropores are formed in and on the surface of the conventional polytetrafluoroethylene film;
4. the high-strength low-density PTFE wrapping tape is characterized in that a plurality of aramid fiber reinforced cores are distributed around the outer circumference of the wrapping tape, the structure is light and soft, the bending is easy, the density is low, the strength is high, the specific strength and the specific modulus of the high-strength low-density PTFE wrapping tape far exceed those of steel wires and glass fiber reinforced cores, the high-strength low-density PTFE wrapping tape not only has ultrahigh tensile strength (more than or equal to 1700 MPa), but also has impact resistance and fracture resistance, the tensile strength of about 1300MPa can be kept even under the condition of fracture, the impact resistance, fracture resistance, bending resistance and tensile strength of the whole cable are greatly improved, and the better stable operation of the wire cores in the cable cores is better ensured;
5. the smooth metal plastic anti-corrosion composite belt ensures the function of the original armor layer, and simultaneously ensures that the cable has the performances of mechanical strength, toughness, wear resistance, corrosion resistance, water resistance and the like;
6. the outer sheath adopts a polyurethane elastic sheath, and the performance of the polyurethane elastic sheath is between that of plastic and rubber, so that the cable has the advantages of oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness, elasticity and good chemical stability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of a high strength, low density PTFE wrapping tape;
fig. 3 is a schematic structural view of a smooth metal plastic corrosion protection composite belt.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
As shown in figure 1, the high-strength anti-corrosion aluminum alloy core low-voltage power cable comprises a conductor 1, wherein a 35kV ultra-clean ethylene propylene rubber insulating layer 2 is extruded outside the conductor to form an insulating wire core;
what needs to be explained here is: the conductor adopts a class 2 stranded conductor conforming to the GB/T3956-2008 standard, in particular to a medium-strength aluminum alloy (LHA 4) wire with a molded line structure, which can greatly reduce the direct current resistance of the conductor at 20 ℃, achieve the energy-saving effect and remarkably improve the mechanical property and the anti-icing overload capacity of the high overhead insulated cable;
the 35kV ultra-clean ethylene propylene rubber insulating layer is adopted, so that the cable has higher heat resistance level, can bear larger current load, has better heat and oxygen aging resistance and ozone aging resistance, and has longer service life and reliability.
A plurality of insulating wire cores are twisted into a cable core, and the gaps of the cable core are filled with corrosion-resistant sealant 3, so that the cable core is more round, has better sealing performance and corrosion resistance, and protects the wire cores better; overlapping and wrapping the high-strength low-density PTFE wrapping tape 4 outside the cable core, wherein the overlapping rate is more than or equal to 75%; a plurality of aramid fiber reinforced cores 5 are distributed around the periphery of the high-strength low-density PTFE wrapping tape, and the high-strength low-density PTFE wrapping tape has the advantages of light texture, easy bending, low density and high strength, and the specific strength and the specific modulus of the high-strength low-density PTFE wrapping tape are far higher than those of steel wires and glass fiber reinforced cores; the cable has ultrahigh tensile strength (more than or equal to 1700 MPa), is impact-resistant and fracture-resistant, can still maintain the tensile strength of about 1300MPa even under the condition of fracture, greatly improves the integral impact resistance, fracture resistance, bending resistance and tensile strength of the cable, and better ensures better stable operation of the cable core in the cable core; and then the smooth metal plastic anti-corrosion composite belt 7 is wrapped outside the aramid fiber reinforced cores 5, and the polyurethane elastic outer sheath 8 is extruded outside the smooth metal plastic anti-corrosion composite belt, and the performance of the composite belt is between that of plastic and rubber, so that the cable has the advantages of oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness, elasticity and good chemical stability.
As shown in fig. 2, the high-strength low-density PTFE tape 4 used in the present cable has a middle part of a non-fully sintered PTFE microporous fiber layer 41, and upper and lower sides of the PTFE microporous fiber layer are fully sintered polytetrafluoroethylene film layers 42, so that the film tape has higher strength by this structure; the thickness of the PTFE microporous fiber layer which is not completely sintered is 1-2mm, and the thickness of the PTFE film layer which is completely sintered is 2-4mm;
by changing the structure of the microporous membrane, the high-strength low-density PTFE wrapping tape has better tensile strength, elongation at break and compression resistance than the common low-density microporous polytetrafluoroethylene film under the condition of keeping lower dielectric constant and dielectric loss than the polytetrafluoroethylene raw tape, the tensile strength, elongation at break and compression resistance of the cable are further improved, and the problems that the tensile strength of the microporous polytetrafluoroethylene material is poor and the compression resistance is poor, accidents such as deformation and fracture easily occur when the cable is wrapped and the cable is greatly influenced due to the fact that a large number of irregular micropores are formed in the inner part and the surface of the conventional polytetrafluoroethylene film are solved.
As shown in fig. 3, the smooth metal plastic anticorrosion composite belt 7 used in the cable comprises a metal layer 71, a plastic film 72 is stuck on one surface of the metal layer by adopting a steel belt, an aluminum belt or a stainless steel belt, a biaxially oriented polypropylene film is adopted, and is prepared by extruding polypropylene particles to form a sheet material and then stretching the sheet material in longitudinal and transverse directions, and the tensile molecules are oriented, so that the physical stability, mechanical strength, toughness and wear resistance of the film are realized, and the other surface is coated with an epoxy anticorrosion coating layer 73 with the thickness of 1-2mm to form an anticorrosion waterproof layer; the smooth metal plastic anti-corrosion composite belt ensures the function of the original armor layer, and simultaneously enables the cable to have the performances of mechanical strength, toughness, wear resistance, corrosion resistance, water resistance and the like.
In summary, through the improvement, the utility model solves the problems of poor corrosion resistance, low strength and the like of the existing low-voltage power cable, greatly enhances the performances of impact resistance, fracture resistance, bending resistance, tensile strength and the like of the whole cable, and ensures that the cable has the advantages of oil resistance, corrosion resistance, wear resistance, low temperature resistance, aging resistance, high hardness, elasticity and good chemical stability.
The present utility model has been described in terms of the preferred embodiments thereof, and it should be understood by those skilled in the art that various modifications can be made without departing from the principles of the utility model, and such modifications should also be considered as being within the scope of the utility model.
Claims (9)
1. A high-strength anti-corrosion aluminum alloy core low-voltage power cable is characterized in that: the cable comprises a conductor, wherein a 35kV ultra-clean ethylene propylene rubber insulating layer is extruded outside the conductor to form an insulating cable core; twisting a plurality of insulating wire cores into a cable core, and filling corrosion-resistant sealant in the gaps of the cable core; overlapping and wrapping high-strength low-density PTFE wrapping tape outside the cable core, wherein the overlapping rate is more than or equal to 75%; and (3) wrapping a smooth metal plastic anti-corrosion composite belt after a plurality of aramid fiber reinforced cores are distributed around the outer periphery of the high-strength low-density PTFE wrapping belt, and extruding a polyurethane elastic outer sheath outside the smooth metal plastic anti-corrosion composite belt.
2. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 1, characterized in that: the conductor adopts a class 2 stranded conductor conforming to the GB/T3956-2008 standard.
3. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 1, characterized in that: the middle of the high-strength low-density PTFE wrapping tape is a PTFE microporous fiber layer which is not completely sintered, and the upper side and the lower side of the PTFE microporous fiber layer are polytetrafluoroethylene film layers which are completely sintered.
4. A high strength corrosion resistant aluminum alloy core piezoelectric cable according to claim 3 wherein: the thickness of the PTFE microporous fiber layer which is not completely sintered is 1-2mm.
5. A high strength corrosion resistant aluminum alloy core piezoelectric cable according to claim 3 wherein: the thickness of the fully sintered polytetrafluoroethylene film layer is 2-4mm.
6. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 1, characterized in that: the smooth metal plastic anti-corrosion composite belt comprises a metal layer, wherein a plastic film is stuck on one surface of the metal layer, and an epoxy anti-corrosion coating layer is coated on the other surface of the metal layer.
7. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 6, characterized in that: the plastic film is a biaxially oriented polypropylene film.
8. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 6, characterized in that: the metal layer is a steel belt, an aluminum belt or a stainless steel belt.
9. The high-strength corrosion-resistant aluminum alloy core piezoelectric cable according to claim 6, characterized in that: the thickness of the epoxy anticorrosive paint layer is 1-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321776165.9U CN220189308U (en) | 2023-07-07 | 2023-07-07 | High-strength anti-corrosion aluminum alloy core low-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321776165.9U CN220189308U (en) | 2023-07-07 | 2023-07-07 | High-strength anti-corrosion aluminum alloy core low-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220189308U true CN220189308U (en) | 2023-12-15 |
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ID=89107082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321776165.9U Active CN220189308U (en) | 2023-07-07 | 2023-07-07 | High-strength anti-corrosion aluminum alloy core low-voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220189308U (en) |
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2023
- 2023-07-07 CN CN202321776165.9U patent/CN220189308U/en active Active
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