CN218568456U - Low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer material - Google Patents
Low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer material Download PDFInfo
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- CN218568456U CN218568456U CN202221848612.2U CN202221848612U CN218568456U CN 218568456 U CN218568456 U CN 218568456U CN 202221848612 U CN202221848612 U CN 202221848612U CN 218568456 U CN218568456 U CN 218568456U
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Abstract
A low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer materials has the structure that: the cable core is formed by sequentially wrapping a second wrapping layer, an anticorrosive sheath layer, a metal sheath layer, a polymer oxygen isolation layer, a third wrapping layer, a polymer anticorrosive layer and an outer sheath from inside to outside; the cable core is formed by a plurality of water-blocking wire cores and waterproof anticorrosion filling stranding; the second wrapping layer is formed by longitudinally wrapping a layer of aluminum-plastic composite tape; the anticorrosive sheath layer is formed by extruding a low-smoke halogen-free flame-retardant thermosetting EVA material; the metal sheath layer is formed by welding aluminum strips; the polymer oxygen-isolating layer is formed by extruding ceramic polyolefin material; the third wrapping layer is formed by overlapping and wrapping a layer of semi-conductive water-blocking tape; the high-molecular anticorrosive layer is formed by coating high-toughness Teflon coating; the outer sheath is formed by extruding and wrapping an environment-friendly thermoplastic polyurethane sheath material. The cable has the advantages of low toxicity, environmental protection and seawater corrosion resistance.
Description
Technical Field
The utility model relates to a resistant sea water corrosion middling pressure power cable of low toxicity environmental protection based on macromolecular material is applicable to rated voltage 3.6/6kV to 26/35 kV's plastics class power cable, belongs to cable technical field.
Background
With the continuous development of science and technology and economy, the market puts forward more requirements on the use scene of the cable on the basis of meeting the electrical performance. The development of new materials is also changing day by day, and how to apply the new materials to cables in special use scenes and ensure that the electrical property, the safety property, the mechanical property, the environmental protection and the like of the cables meet the requirements is a technical difficulty which is urgently needed to be solved at present.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Satisfy the requirement of resistant seawater corrosion, low toxicity to needs under multiple service environment, the utility model discloses the problem that the cable need be solved mainly has: no seawater corrosion resistance test requirements and test indexes exist in national standards, industrial users are unfamiliar with seawater corrosion resistance, relevant production and test experiences are lacked, and from the aspects of cable type selection and design, the requirements of seawater corrosion resistance test examination are provided on the basis of meeting the electrical performance of the cable, and the filling performance of the cable, the corrosion resistance and the low-toxicity and the thermal stability of a sheath are improved.
Technical scheme adopted for solving the technical problems
The utility model provides a low toxicity environmental protection resistant sea water corrosion middling pressure power cable based on macromolecular material which the characterized by structure is:
the cable core is formed by sequentially wrapping a second wrapping layer, an anticorrosive sheath layer, a metal sheath layer, a polymer oxygen isolation layer, a third wrapping layer, a coated polymer anticorrosive layer and an outer sheath from inside to outside;
the cable core is formed by a water-blocking wire core and waterproof anticorrosion filling stranding; the anticorrosive waterproof filling is composed of modified polypropylene closed-cell foam strips;
the nominal thickness of the aluminum-plastic composite tape of the second lapping layer is 0.25mm, and the thickness of the aluminum foil layer is not less than 0.12mm;
the nominal thickness of the low-smoke halogen-free flame-retardant thermosetting EVA material of the anticorrosive sheath layer is 1.8-3.0 mm, and the average thickness of the sheath is not less than the nominal value;
the nominal thickness of the argon arc welding aluminum strip of the metal sheath layer is 2.5mm;
the polymer oxygen-isolating layer is formed by extruding a ceramic polyolefin material, and the thickness of the polymer oxygen-isolating layer is 1.8-3.5 mm;
the nominal thickness of the semi-conductive water-blocking tape of the third wrapping layer is 0.25mm, the average wrapping coverage rate is not less than 20%, and the minimum covering rate is not less than 15%;
the high-molecular anticorrosive layer is formed by coating high-toughness Teflon coating, and the thickness of the high-molecular anticorrosive layer is 0.6-1.2 mm;
the outer sheath is formed by extruding and wrapping an environment-friendly thermoplastic polyurethane sheath material, the nominal thickness is not less than 3.0mm, and the thinnest point thickness is not less than 90% of the nominal value;
the single wire core is structurally provided with a water-blocking conductor, a water-blocking layer, a conductor shielding layer, an insulating shielding layer and a first wrapping layer from inside to outside in sequence; the water-blocking conductor adopts a second type of twisted and compacted round structure and is made of copper or aluminum, and an insulating water-blocking tape is longitudinally wrapped between twisted layers.
And further:
case a: the nominal cross-sectional area is not more than 50mm 2 The aluminum conductor of (2) forms a cable, and the cabling pitch-diameter ratio of a cable core is 15-21;
in the case other than the case a, the cable core of the cable has a cable pitch ratio of 22 to 29.
The conductor is a copper conductor or an aluminum conductor;
the copper conductor is formed by stranding bare copper monofilaments, and the diameter range of the bare copper monofilaments is 2.21 mm-3.95 mm; the diameter range of the conductor is 6.0 mm-37.9 mm; the stranding direction of the bare copper monofilament is the left direction;
the aluminum conductor is formed by twisting bare aluminum monofilaments, and the diameter range of the bare aluminum monofilaments is 2.16-4.73 mm; the diameter range of the conductor is 6.0 mm-38.1 mm; the twisting direction of the bare aluminum monofilament is the left direction.
The polypropylene closed-cell foam strip material is prepared by adopting a supercritical carbon dioxide technology, carbon dioxide gas is introduced into a polypropylene material matrix at high temperature and high pressure, and the polypropylene material is induced to nucleate and foam to form a microporous foam material containing a large number of micron-scale blast holes, and the microporous foam material can naturally adapt to water absorption expansion after being modified and has high strength.
The conductor shielding layer and the insulation shielding layer are formed by extruding and wrapping an environment-friendly peroxide cross-linked semi-conductive shielding material; the insulating layer is formed by extruding and wrapping an environment-friendly insulating material of cross-linked polyethylene.
The first wrapping layer is formed by overlapping a layer of soft copper tape, the nominal thickness of the soft copper tape is 0.15mm, the nominal value of the wrapping coverage rate is not less than 25%, and the minimum coverage rate is not less than 10%;
the nominal thickness of the aluminum-plastic composite tape of the second lapping layer is 0.25mm, and the thickness of the aluminum foil layer is not less than 0.12mm;
the nominal thickness of the low-smoke halogen-free flame-retardant thermosetting EVA material of the anti-corrosion sheath layer is 1.8-3.0 mm, and the average thickness of the sheath is not less than the nominal value;
the nominal thickness of the argon arc welding aluminum strip of the metal sheath layer is 2.5mm;
the nominal thickness of the semi-conductive water-blocking tape of the third wrapping layer is 0.25mm, the average wrapping coverage rate of the wrapping is not less than 20%, and the minimum covering rate of the wrapping is not less than 15%;
the nominal thickness of the outer sheath is not less than 3.0mm, and the thinnest point thickness is not less than 90% of the nominal value.
The cable core cabling adopts the flame-retardant filling material for filling, the filling is compact and round, the flame-retardant filling material is isocyanate-based Polyimide (PI) foam, and the flame-retardant filling material can be tightly filled in the middle of a cable core in the cabling process, so that gaps are eliminated, and the effects of improving the cable roundness and increasing the strength are achieved. The covalent bond between the graphene and the PI matrix enables isocyanate-based Polyimide (PI) foam to have a high Young's modulus, and the isocyanate-based Polyimide (PI) foam can reach a very high limiting oxygen index (39.4) by adding a very small amount of red phosphorus hybrid graphene flame retardant (2.2 wt%), which is higher than that of common polymer flame retardant materials (the oxygen index of common polymer flame retardant materials is about 20-30). Because red phosphorus can reach nanometer dispersion at the graphite alkene piece surface for isocyanate group Polyimide (PI) foam has the insulating nature that is equivalent to air, and has higher intensity, can bear great longitudinal and radial stress. The material is processed by a more advanced ball milling method, no organic solvent is needed in the production process, no waste is generated, the material is environment-friendly and non-toxic, and the yield is close to 100%.
Compared with the traditional filling material, the high-toughness Teflon coating adopted by the high-molecular anticorrosive layer has the following structural performance advantages:
the Teflon coating has strong adhesive force, firm film formation, high surface hardness, impact resistance, abrasion resistance, acid and alkali corrosion resistance, no toxicity and odor after curing, no environmental pollution and suitability for drinking water engineering; the solid content of the material can reach 100 percent, the unit area consumption is less, the required thickness can be reached by one-time construction, the ductility of the coating is good, the multi-layer coating is not easy to peel off, and the lamination is tight; the multilayer film has high tensile strength, good mechanical property and good repairability, and can meet the use requirement of low temperature of minus 40 ℃; the multilayer film is resistant to chemical corrosion and aging and has good flame retardant property.
After adopting above-mentioned technical scheme, this cable has following beneficial effect:
(1) The extruded environment-friendly thermoplastic polyurethane sheath material has better stability, no harmful gas release after long-time use and no collapse of a body structure on the premise of meeting the requirement of external stress impact resistance in the traditional sense, so that the extruded environment-friendly thermoplastic polyurethane sheath material can be used under a slight laying environment.
(2) Based on the introduction of new materials and new structures, the specific structure of the cable also ensures the requirements of the electrical property, the mechanical property and the like of the cable.
The cable can pass a flame-retardant A-type bundled combustion test in GB/T18380.33-2008, can meet the qualified index of low toxicity performance in GB/T19666-2019, and passes the requirement of a water permeability test in GB/T12706-2020.
The utility model discloses the cable has used the packing of environmental protection and fire-retardant layer and specific structure in order to reach the effect that improves low toxicity, waterproof, corrosion protection performance simultaneously to can be applicable to the seashore electric power engineering project.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a water blocking conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a first lapping layer; 6. waterproof and anticorrosive filling; 7. a second lapping layer; 8. an anti-corrosion sheath layer; 9. a metal sheath layer, 10, a polymer oxygen barrier layer; 11. a third lapping layer; 12. a polymer anticorrosive layer; 13. an outer sheath.
Detailed Description
As shown in fig. 1, the low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the polymer material has the following structure:
a low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer materials has the structure that: the cable core is formed by sequentially wrapping a second wrapping layer 7, an anticorrosive sheath layer 8, a metal sheath layer 9, a polymer oxygen-isolating layer 10, a third wrapping layer 11, a polymer anticorrosive layer 12 and an outer sheath 13 from inside to outside;
the cable core is formed by twisting a plurality of water-blocking wire cores and waterproof and anticorrosive filling 6;
the second wrapping layer is formed by longitudinally wrapping a layer of aluminum-plastic composite tape;
the anticorrosion sheath layer is formed by extruding a low-smoke halogen-free flame-retardant thermosetting EVA material, the nominal thickness of the anticorrosion sheath layer is 1.8-3.0 mm, and the nominal average thickness of the anticorrosion sheath layer is not less than a nominal value;
the metal sheath layer is formed by welding aluminum strips;
the polymer oxygen-isolating layer is formed by extruding a ceramic polyolefin material, and the thickness of the polymer oxygen-isolating layer is 1.8-3.5 mm;
the third wrapping layer is formed by overlapping and wrapping a layer of semi-conductive water-blocking tape;
the high-molecular anticorrosive layer is formed by coating high-toughness Teflon, and the thickness of the high-molecular anticorrosive layer is 0.6-1.2 mm;
the outer sheath is formed by extruding and wrapping an environment-friendly thermoplastic polyurethane sheath material, the nominal thickness is not less than 3.0mm, and the thinnest point thickness is not less than 90% of the nominal value.
In this example:
the water-blocking wire core is structurally provided with a water-blocking conductor 1, a water-blocking layer, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4 and a first wrapping layer 5 from inside to outside in sequence;
the water-blocking conductor adopts a second-type twisted and compressed round structure, the conductor is made of copper or aluminum, and water-blocking yarns are filled between adjacent metal monofilament twisted layers and longitudinally wrap the single-side insulating water-blocking tape.
In the waterproof conductor, a single-sided insulating waterproof tape with the nominal thickness of 0.2mm is longitudinally wrapped between the central metal monofilament and the metal monofilament twisted layer outside the central metal monofilament; a layer of single-sided insulating water-blocking tape with nominal thickness of 0.2mm is longitudinally wrapped between the other adjacent metal monofilament twisted layers; the insulating water-blocking tape constitutes the water-blocking layer. The insulating water-blocking tapes are overlapped by lapping covers, and the overlapping rate is not less than 5mm.
During production: if the copper conductor is formed by twisting bare copper monofilaments, the diameter range of the bare copper monofilaments is 2.21 mm-3.95 mm; the diameter range of the conductor is 6.0 mm-37.9 mm; the stranding direction of the bare copper monofilaments is the left direction;
if the aluminum conductor is formed by twisting bare aluminum monofilaments, the diameter range of the bare aluminum monofilaments is 2.16-4.73 mm; the diameter range of the conductor is 6.0 mm-38.1 mm; the twisting direction of the bare aluminum monofilament is the left direction.
In this example: the conductor shielding layer and the insulation shielding layer are formed by extruding and wrapping an environment-friendly peroxide cross-linked semi-conductive shielding material;
the insulating layer is formed by extruding cross-linked polyethylene environment-friendly low-toxicity insulating materials.
The first wrapping layer is formed by overlapping and wrapping a layer of soft copper tape, the nominal thickness of the soft copper tape is 0.15mm, the nominal value of the wrapping covering rate is not less than 25%, and the minimum covering rate is not less than 10%.
In order to ensure the structural performance of the cable, the cabling pitch-diameter ratio range of the cable core is 15-29 times;
for a nominal cross-sectional area of not more than 50mm 2 The aluminum conductor of (2) forms a cable, and the cabling pitch diameter ratio of the cable core is 15-21; and the other conductors form the cable, and the cabling pitch diameter ratio of the cable core is 22-29.
The waterproof and anticorrosive filling is composed of modified polypropylene closed-cell foam strips. The modified polypropylene closed-cell foam strip material can naturally adapt to water absorption expansion, has high expansion coefficient and is environment-friendly.
In this example: the nominal thickness of the aluminum-plastic composite tape of the second lapping layer is 0.25mm, and the thickness of the aluminum foil layer is not less than 0.12mm;
the metal sheath layer is formed by aluminum strip argon arc welding, and the nominal thickness of the aluminum strip is 2.5mm;
the nominal thickness of the semi-conductive water-blocking tape of the third wrapping layer is 0.25mm, the average wrapping covering rate is not less than 20%, and the minimum covering rate is not less than 15%.
In this example:
the manufacturer, model/brand of the thermosetting EVA material is AT-333, new Anterfield Material Co., ltd, suzhou;
the manufacturer, model/brand of the ceramic polyolefin material is YLJXT101, a new material company of Shenzhen Yulong;
please show that the manufacturer of Teflon coating available from outsourcing, model/brand, is TE3859, a Haishu plastics materials Co., ltd, dongguan city;
the manufacturer, model or brand of the conductor shielding material is YP-35 of Suzhou Longohai plastics GmbH;
the manufacturer, model/brand of the insulation shielding material is YPB-35 of Suzhou Longohai plastics Co., ltd;
the manufacturer, model/brand of the insulation material is Suzhou Longohu plastication Co.Ltd DJ210;
the cable of the embodiment has the following detection results, and the test results are qualified:
Claims (9)
1. the utility model provides a low toxicity environmental protection resistant sea water corrosion middling pressure power cable based on macromolecular material which the characterized by structure is: the cable core is formed by sequentially wrapping a second wrapping layer, an anticorrosive sheath layer, a metal sheath layer, a polymer oxygen isolation layer, a third wrapping layer, a polymer anticorrosive layer and an outer sheath from inside to outside;
the cable core is formed by a plurality of water-blocking wire cores and waterproof anticorrosion filling stranding;
the second wrapping layer is formed by longitudinally wrapping a layer of aluminum-plastic composite tape;
the anticorrosion sheath layer is formed by extruding a low-smoke halogen-free flame-retardant thermosetting EVA material, the nominal thickness of the anticorrosion sheath layer is 1.8-3.0 mm, and the nominal average thickness of the anticorrosion sheath layer is not less than a nominal value;
the metal sheath layer is formed by welding aluminum strips;
the polymer oxygen-isolating layer is formed by extruding ceramic polyolefin materials, and the thickness of the polymer oxygen-isolating layer is 1.8-3.5 mm;
the third wrapping layer is formed by overlapping and wrapping a layer of semi-conductive water-blocking tape;
the high-molecular anticorrosive layer is formed by coating high-toughness Teflon coating, and the thickness of the high-molecular anticorrosive layer is 0.6-1.2 mm;
the outer sheath is formed by extruding and wrapping an environment-friendly thermoplastic polyurethane sheath material, the nominal thickness is not less than 3.0mm, and the thinnest point thickness is not less than 90% of the nominal value.
2. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the high polymer material as claimed in claim 1, wherein the structure of the water-blocking wire core is that a water-blocking conductor, a water-blocking layer, a conductor shielding layer, an insulating shielding layer and a first wrapping layer are sequentially arranged from inside to outside;
the water-blocking conductor adopts a second-type twisted and compressed round structure, the conductor is made of copper or aluminum, and water-blocking yarns are filled between adjacent metal monofilament twisted layers and longitudinally wrap the single-side insulating water-blocking tape.
3. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on high polymer materials as claimed in claim 2, wherein a single-sided insulating water-blocking tape with nominal thickness of 0.2mm is longitudinally wrapped between the central metal monofilament and the metal monofilament twisted layer outside the central metal monofilament in the water-blocking conductor; a layer of single-sided insulating water-blocking tape with nominal thickness of 0.2mm is longitudinally wrapped between the other adjacent metal monofilament twisted layers; the water-blocking layer is formed by a single-sided insulating water-blocking tape; the single-sided insulating water-blocking tape is overlapped by lapping, and the overlapping rate is not less than 5mm.
4. The polymer-based low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable according to claim 2, wherein the cable is characterized in that
The copper conductor is formed by twisting bare copper monofilaments, and the diameter range of the bare copper monofilaments is 2.21-3.95 mm; the diameter range of the conductor is 6.0 mm-37.9 mm; the stranding direction of the bare copper monofilament is the left direction;
the aluminum conductor is formed by twisting bare aluminum monofilaments, and the diameter range of the bare aluminum monofilaments is 2.16-4.73 mm; the diameter range of the conductor is 6.0 mm-38.1 mm; the twisting direction of the bare aluminum monofilament is the left direction.
5. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the high-molecular material as claimed in claim 2, wherein the conductor shielding layer and the insulation shielding layer are formed by extruding environment-friendly peroxide cross-linked semiconductive shielding material;
the insulating layer is formed by extruding and wrapping an environment-friendly low-toxicity insulating material of crosslinked polyethylene.
6. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the high-molecular material as claimed in claim 2, wherein the first wrapping layer is formed by overlapping and wrapping a layer of soft copper tape, the nominal thickness of the soft copper tape is 0.15mm, the nominal value of the wrapping and covering rate is not less than 25%, and the minimum covering rate is not less than 10%.
7. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the high polymer material as claimed in claim 1 or 2, wherein the cabling pitch diameter ratio of the cable core is in the range of 15-29 times;
for a nominal cross-sectional area of not more than 50mm 2 The aluminum conductor of (2) forms a cable, and the cabling pitch diameter ratio of the cable core is 15-21; and the other conductors form the cable, and the cabling pitch diameter ratio of the cable core is 22-29.
8. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on high polymer materials as claimed in claim 1 or 2, wherein the waterproof and anticorrosive filling is composed of modified polypropylene closed-cell foam strips.
9. The low-toxicity environment-friendly seawater corrosion-resistant medium-voltage power cable based on the high polymer material as claimed in claim 1 or 2, wherein the nominal thickness of the aluminum-plastic composite tape of the second wrapping layer is 0.25mm, and the thickness of the aluminum foil layer is not less than 0.12mm;
the metal sheath layer is formed by aluminum strip argon arc welding, and the nominal thickness of the aluminum strip is 2.5mm;
the nominal thickness of the semi-conductive water-blocking tape of the third wrapping layer is 0.25mm, the average wrapping covering rate is not less than 20%, and the minimum covering rate is not less than 15%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221848612.2U CN218568456U (en) | 2022-07-19 | 2022-07-19 | Low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221848612.2U CN218568456U (en) | 2022-07-19 | 2022-07-19 | Low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer material |
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| CN218568456U true CN218568456U (en) | 2023-03-03 |
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| CN202221848612.2U Active CN218568456U (en) | 2022-07-19 | 2022-07-19 | Low-toxicity environment-friendly seawater corrosion resistant medium-voltage power cable based on high polymer material |
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