CN213781665U - Environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable - Google Patents
Environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable Download PDFInfo
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- CN213781665U CN213781665U CN202022323641.4U CN202022323641U CN213781665U CN 213781665 U CN213781665 U CN 213781665U CN 202022323641 U CN202022323641 U CN 202022323641U CN 213781665 U CN213781665 U CN 213781665U
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Abstract
An environment-friendly flame-retardant anticorrosion aluminum wire armored low-voltage power cable is formed by sequentially wrapping a lining layer, a nonmagnetic armor layer, an anticorrosion coating, a third wrapping tape layer and an outer sheath outside a cable core; the cable core is formed by twisting a plurality of insulating wire cores in the right direction and then wrapping a second wrapping tape layer outside; the insulated wire core is formed by wrapping an insulated layer outside a conductor; the radial cross section of the conductor is fan-shaped or circular; the insulating layer is a crosslinked polyethylene insulating layer made of crosslinked polyethylene insulating materials; the second wrapping band layer is formed by wrapping a high-strength non-woven fabric wrapping band, and the covering rate is not less than 15%; the inner liner layer is made of low-smoke halogen-free polyolefin material; the non-magnetic armor layer is formed by aluminum wire armor, and the shape of the aluminum wire is round aluminum wire or flat aluminum wire; the corrosion-resistant coating is formed by cable asphalt or thermosol; the third wrapping tape layer is formed by overlapping and wrapping waterproof flame-retardant wrapping tapes; the outer sheath is made of polyethylene cable material, low-smoke halogen-free flame-retardant polyolefin cable material or polyvinyl chloride cable material.
Description
Technical Field
The utility model relates to the technical field of cables, specifically an environmental protection fire-retardant anticorrosive aluminium silk armor low voltage power cable.
Background
In the prior art, a cable is laid in a humid environment for a long time, and due to weather (typhoon, plum rain and the like) or geography (coastal and river regions) and other reasons, a lot of water (such as acid rain, seawater and the like) is accumulated around the cable frequently. At this time, if the cable is broken down or broken due to some external reason, water enters the cable, which causes corrosion of metal layers such as armor and the like, and decreases the insulation performance, finally causing the cable to break down. In summary, medium voltage power cables used in environmental areas close to rivers, lakes, oceans, etc. have high requirements for waterproof and corrosion-resistant properties of the cables.
In addition, there is an increasing demand for halogen-free low-smoke flame-retardant power cables in large densely populated public places such as various urban public buildings, underground space public transportation facilities, and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fire-retardant anticorrosive aluminum wire armor low pressure power cable of environmental protection, it has characteristics such as no halogen low cigarette, fire-retardant, anticorrosion, waterproof, low loss, lightweight.
In order to achieve the above object, the utility model provides an environmental protection fire-retardant anticorrosive aluminum wire armor low voltage power cable, its characterized in that: the cable is formed by sequentially wrapping a lining layer, a non-magnetic armor layer, an anti-corrosion coating, a third wrapping tape layer and an outer sheath outside a cable core;
the cable core is formed by twisting a plurality of insulated wire cores in the right direction and then wrapping a second wrapping tape layer outside, and gaps among the insulated wire cores and gaps between the insulated wire cores and the second wrapping tape layer are filled with filling ropes;
the insulated wire core is formed by wrapping an insulated layer outside a conductor;
the radial section of the conductor is fan-shaped or round, and the conductor is a class 2 conductor formed by pressing and stranding copper monofilaments or aluminum monofilaments;
the insulating layer is a crosslinked polyethylene insulating layer made of crosslinked polyethylene insulating materials;
the filling rope is a high-temperature-resistant flame-retardant filling rope;
the second wrapping tape layer is formed by wrapping a high-strength non-woven fabric wrapping tape, and the covering rate is not less than 15%;
the lining layer is made of low-smoke halogen-free polyolefin material;
the non-magnetic armor layer is formed by aluminum wire armor, and the shape of the aluminum wire is a round aluminum wire or a flat aluminum wire;
the anti-corrosion coating is formed by cable asphalt or thermosol, and at least 99% of the area of the same circumferential surface of the outer surface of the non-magnetic armor layer is covered by the anti-corrosion coating;
the third wrapping tape layer is formed by overlapping and wrapping waterproof flame-retardant wrapping tapes, and the minimum covering rate of the overlapping and wrapping is not less than 25%;
the outer sheath is made of polyethylene cable material, low-smoke halogen-free flame-retardant polyolefin cable material or polyvinyl chloride cable material.
Further: in the insulating wire core, a first wrapping tape layer is wrapped outside the insulating layer; the nominal width of the first wrapping tape layer is 55mm, the nominal thickness of the first wrapping tape layer is 0.1mm, and the minimum lapping rate of the wrapping is not less than 50%; the first wrapping tape layer is marked with split-phase numbers.
Preferably:
the thickness of the insulating layer is not less than 1.52mm, such as a nominal thickness of 1.8 mm.
The second is around the band of band layer is that one or more collocation in low smoke and zero halogen fire-retardant band, glass fiber band, fire-retardant strap or non-woven fabrics band is around band. For example: the second is around the band layer and is wrapped the package by 2 layers nominal 0.2 mm's non-woven fabrics in proper order and constitute, and the individual layer non-woven fabrics is not less than 15% around taking the lid rate of taking of band.
The filling rope is one of an alkali-free glass fiber filling rope, a flame-retardant high-temperature filling rope or a dust-free rock wool rope.
The inner liner is formed by extruding flame-retardant low-smoke halogen-free polyolefin cable materials or formed by overlapping flame-retardant low-smoke halogen-free polyolefin wrapping tapes. The average thickness of the inner liner layer is 1.8mm, and the thinnest point thickness is not less than 1.24 mm.
The aluminum wire is a flat aluminum wire with a nominal thickness of 1.8mm and a nominal width of 6.4 mm.
The thinnest thickness of the corrosion protection coating is 0.2 mm.
The third wrapping tape layer is formed by matching one or more of a PETD tape, a water-blocking buffer tape, a low-smoke halogen-free flame-retardant tape, a glass fiber wrapping tape or a flame-retardant cloth tape.
The outer sheath is made of low-smoke halogen-free flame-retardant polyolefin sheath material, the nominal thickness of the outer sheath is 3.2mm, and the thinnest point thickness is not less than 2.36 mm.
The performance requirement of an insulated wire core formed by wrapping a conductor by a crosslinked polyethylene insulating layer meets the specification of IEC 60502-1.
The first wrapping band layer is a digital band printed with split-phase marks, and the width and the printing content of the first wrapping band layer are determined according to specific use requirements.
The structural size of the flat aluminum wires of the non-magnetic armor layer is determined according to the capacity of bearing fault short-circuit current, and the structural size of the flat aluminum wires conforms to the related regulation of IEC 60502-1.
The third wrapping tape layer is wrapped outside the corrosion-resistant coating layer in an overlapping wrapping mode, and is used for water resistance, flame retardance and fixation.
The outer sheath has the effects of no halogen, low smoke, flame retardance and the like. In addition, the sheath material also has the advantages of corrosion resistance and chemical decomposition resistance caused by high acid, high alkali and high sulfur content in soil, and the other properties meet the related regulations of IEC 60502-1.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses in, cable core filler material, around package material, inner liner, the oversheath all adopts low smoke and zero halogen material, when guaranteeing the environment friendly nature of cable, provides the excellent fire behaviour of cable.
2. The utility model discloses in, the non-magnetism armor of cable the aluminium silk armor can be in the arbitrary armor form in circle aluminium silk armor or the flat aluminium silk armor. The flat aluminum wire armor structure has the advantages of being light in weight, good in bending performance and good in heat dissipation effect, facilitating laying and installation and improving current carrying capacity of cables, meanwhile, the flat aluminum wire armor structure has certain compression resistance and tensile strength, and has higher hoisting safety performance for hoisting cables.
3. The utility model discloses in, the at least 99% surface of cable non-magnetic armor layer periphery is covered by the anticorrosive coating of thinnest 0.2mm thickness, and the suitable package that blocks water of the inside and outside cladding of anticorrosive coating is around the package strip, and the oversheath material adopts corrosion-resistant sheath material, and these have guaranteed the waterproof and corrosion protection performance of cable jointly.
Drawings
Fig. 1 is a schematic radial cross-sectional view of a quad cable according to an embodiment of the present invention.
The labels in the figure are: the cable comprises a conductor 1, a (crosslinked polyethylene) insulating layer 2, a first wrapping tape layer 3, a filling rope 4, a second wrapping tape layer 5, an inner lining layer 6, a nonmagnetic armor layer 7, an anticorrosion coating layer 8, a third wrapping tape layer 9 and an outer sheath 10.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are specifically illustrated in conjunction with fig. 1 as follows:
an environment-friendly flame-retardant anticorrosion aluminum wire armored low-voltage power cable is formed by sequentially wrapping a lining layer, a nonmagnetic armor layer, an anticorrosion coating, a third wrapping tape layer and an outer sheath outside a cable core;
the cable core is formed by twisting a plurality of insulated wire cores in the right direction and then wrapping a second wrapping tape layer outside, and gaps among the insulated wire cores and gaps between the insulated wire cores and the second wrapping tape layer are filled with filling ropes;
the insulating wire core is formed by sequentially wrapping an insulating layer and a first wrapping tape layer outside a conductor;
the insulated wire cores are cabled in the right direction (twisted), and the gaps are filled and rounded by filling ropes.
Fig. 1 is a schematic radial cross-sectional view of the four-core cable of the present embodiment, and the cable of the present embodiment is processed by the following steps: the conductor 1 is sequentially coated with a crosslinked polyethylene insulating layer 2 and a first wrapping band layer 3 to form an insulating wire core. The four insulated wire cores are cabled in the right phase, the other parts adopt non-hygroscopic filling materials 4, and a second wrapping layer 5 is wrapped outside to form a cable core. The inner liner 6 is coated outside the cable core, the aluminum wire armor layer 7 is used for armor outside the inner liner 6, the anti-corrosion coating 8 is uniformly and completely coated on the outer circumferential surface of the aluminum wire armor layer 7, the anti-corrosion coating 8 is coated with the third wrapping layer 9, and the third wrapping layer 9 is coated with the outer sheath 10. The conductor 1 is a 2-type fan-shaped aluminum conductor formed by pressing and stranding aluminum monofilaments. The cross-linked polyethylene insulating layer 2 is extruded on the conductor 1, the nominal thickness of the insulation is 1.8mm, the average thickness is not less than 1.8mm, and the minimum point thickness is not less than 1.52 mm.
The non-woven fabric digital phase-splitting identification tapes ('1 ONE', '2 TWO', '3 THEE' and 'NNN') are respectively wrapped on the insulating layer 2 in the same direction, the nominal width of the wrapping tapes is 55mm, the nominal thickness is 0.1mm, and the minimum covering rate of the wrapping is not less than 50%.
The lining layer 6 is an extruded low-smoke halogen-free polyolefin material, the nominal thickness is 1.8mm, and the minimum point thickness is not less than 1.24 mm.
The aluminum wire armor adopts flat aluminum wire armor 7, and the nominal thickness of armor wire is 1.8mm, and nominal width is 6.4mm, and flat aluminum wire passes through specific tool equipment, inseparable, level winding package on lining layer 6.
The anti-corrosion coating 8 is made of soft and high-viscosity cable asphalt and is uniformly and completely coated on the outer circumferential surface of the flat aluminum wire armor 7.
And the third wrapping tape layer adopts a semi-conductive water-blocking buffer tape and a low-smoke halogen-free flame-retardant tape to be overlapped and wrapped, the minimum covering rate is not less than 25%, and the wrapping is smooth.
The outer sheath 10 is made of a low-smoke halogen-free flame-retardant polyolefin sheath material with a high oxygen index, the nominal thickness is 3.2mm, and the thinnest point thickness is not less than 2.36 mm. The sheathing material should be resistant to corrosion or chemical decomposition due to high acid, high alkali and high sulfur content in the soil.
After detection, the performance parameters of the cable of the embodiment are as follows:
1. conductor direct current resistance: the conductor resistance complies with the relevant regulations in IEC 60228.
2. And (3) alternating current withstand voltage test: and power frequency voltage meeting the IEC60502-1 requirement is applied, and the cable is not broken down.
3. Electrical and non-electrical performance: the cable is tested according to IEC60502-1, and the performance detection is completely qualified.
4. Environmental protection performance: the halogen content and the light transmittance of the cable are detected according to IEC60754 and IEC 61034, and the cable is qualified.
5. Flame retardant property: the cable is subjected to A-type bundled flame retardant test according to IEC60332-3-22, the carbonization height is 0.9 m, and the performance meets the standard specification (the carbonization height is less than or equal to 2.5m as required by the standard).
6. Corrosion resistance: according to IEC 60229: 2007 requirements a corrosion propagation test of the armor was performed, using a core drill of 10mm diameter pierced through to the armor at 4 places on the outer jacket. The four holes should be arranged helically in the middle of the cable specimen with a length of about 100mm apart and a circumference of 90 deg. apart. All material from each hole should be removed, exposing a circular hole of 10mm in diameter. After the test, there was no corrosion at the edge of the hole.
7. Boiling water test: a cable sample with the length of 600mm is evenly divided into 2 sections, the two sections are immersed in boiling water for 60 seconds, then the sample is taken out of the water, the outer sheath is longitudinally cut and stripped, and the surface area of the outer circumferential surface of all the steel wire armor layers is still covered by the asphalt film with the thickness of not less than 0.2mm, so that the anti-corrosion layer of the cable is firm and effective.
In conclusion, the environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable has excellent anticorrosive property and halogen-free low-smoke flame-retardant property, effectively reduces the breakdown failure rate of the cable, can safely and stably operate for a long time even in a humid environment, saves the consumption of materials such as copper, aluminum and polyethylene in the life cycle of the product, and conforms to the green development of the cable industry.
Claims (10)
1. The utility model provides an environmental protection fire-retardant anticorrosive aluminum wire armoured low voltage power cable which characterized in that: the cable is formed by sequentially wrapping a lining layer, a non-magnetic armor layer, an anti-corrosion coating, a third wrapping tape layer and an outer sheath outside a cable core;
the cable core is formed by twisting a plurality of insulated wire cores in the right direction and then wrapping a second wrapping tape layer outside, and gaps among the insulated wire cores and gaps between the insulated wire cores and the second wrapping tape layer are filled with filling ropes;
the insulated wire core is formed by wrapping an insulated layer outside a conductor;
the radial section of the conductor is fan-shaped or round, and the conductor is a class 2 conductor formed by pressing and stranding copper monofilaments or aluminum monofilaments;
the insulating layer is a crosslinked polyethylene insulating layer made of crosslinked polyethylene insulating materials;
the filling rope is a high-temperature-resistant flame-retardant filling rope;
the second wrapping tape layer is formed by wrapping a high-strength non-woven fabric wrapping tape, and the covering rate is not less than 15%;
the lining layer is made of low-smoke halogen-free polyolefin material;
the non-magnetic armor layer is formed by aluminum wire armor, and the shape of the aluminum wire is a round aluminum wire or a flat aluminum wire;
the anti-corrosion coating is formed by cable asphalt or thermosol, and at least 99% of the area of the same circumferential surface of the outer surface of the non-magnetic armor layer is covered by the anti-corrosion coating;
the third wrapping tape layer is formed by overlapping and wrapping waterproof flame-retardant wrapping tapes, and the minimum covering rate of the overlapping and wrapping is not less than 25%;
the outer sheath is made of polyethylene cable material, low-smoke halogen-free flame-retardant polyolefin cable material or polyvinyl chloride cable material.
2. The environment-friendly flame-retardant anticorrosive aluminum-wire-armored low-voltage power cable according to claim 1, wherein in the insulated wire core, a first wrapping tape layer is further wrapped outside the insulated layer; the nominal width of the first wrapping tape layer is 55mm, the nominal thickness of the first wrapping tape layer is 0.1mm, and the minimum lapping rate of the wrapping is not less than 50%; the first wrapping tape layer is marked with split-phase numbers.
3. The environment-friendly flame-retardant anti-corrosion aluminum-wire-armored low-voltage power cable according to claim 1, wherein the thickness of the insulating layer is not less than 1.52 mm.
4. The environment-friendly flame-retardant anti-corrosion aluminum-wire-armored low-voltage power cable according to claim 1, wherein the wrapping tape of the second wrapping tape layer is formed by matching one or more of a low-smoke halogen-free flame-retardant wrapping tape, a glass fiber wrapping tape, a flame-retardant cloth tape or a non-woven fabric wrapping tape.
5. The environment-friendly flame-retardant anticorrosive aluminum-wire-armored low-voltage power cable according to claim 1, wherein the filler rope is one of an alkali-free glass fiber filler rope, a flame-retardant high-temperature filler rope or a dust-free rock wool rope.
6. The environment-friendly flame-retardant anticorrosive aluminum-wire-armored low-voltage power cable according to claim 1, characterized in that the inside liner is formed by extruding flame-retardant low-smoke halogen-free polyolefin cable material or formed by overlapping flame-retardant low-smoke halogen-free polyolefin wrapping tapes;
the average thickness of the inner liner layer is 1.8mm, and the thinnest point thickness is not less than 1.24 mm.
7. The environment-friendly flame-retardant anti-corrosion aluminum-wire-armored low-voltage power cable according to claim 1, wherein the aluminum wires are flat aluminum wires with a nominal thickness of 1.8mm and a nominal width of 6.4 mm.
8. The environment-friendly flame-retardant anti-corrosion aluminum-wire-armored low-voltage power cable according to claim 1, wherein the thinnest thickness of the anti-corrosion coating is 0.2 mm.
9. The environment-friendly flame-retardant anticorrosive aluminum-wire-armored low-voltage power cable according to claim 1, wherein the wrapping tape of the third wrapping tape layer is one or more of a PETD tape, a water-blocking buffer tape, a low-smoke halogen-free flame-retardant tape, a glass fiber wrapping tape or a flame-retardant cloth tape.
10. The environment-friendly flame-retardant anticorrosive aluminum-wire-armored low-voltage power cable according to claim 1, characterized in that the outer sheath is made of a low-smoke halogen-free flame-retardant polyolefin sheath material, the nominal thickness of the outer sheath is 3.2mm, and the thinnest point thickness is not less than 2.36 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022323641.4U CN213781665U (en) | 2020-10-19 | 2020-10-19 | Environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022323641.4U CN213781665U (en) | 2020-10-19 | 2020-10-19 | Environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable |
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| CN213781665U true CN213781665U (en) | 2021-07-23 |
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| CN202022323641.4U Active CN213781665U (en) | 2020-10-19 | 2020-10-19 | Environment-friendly flame-retardant anticorrosive aluminum wire armored low-voltage power cable |
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