CN214796872U - Flat aluminum wire armored cable - Google Patents
Flat aluminum wire armored cable Download PDFInfo
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- CN214796872U CN214796872U CN202120791541.6U CN202120791541U CN214796872U CN 214796872 U CN214796872 U CN 214796872U CN 202120791541 U CN202120791541 U CN 202120791541U CN 214796872 U CN214796872 U CN 214796872U
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Abstract
A flat aluminum wire armored cable has an outer diameter range of 66.5-70.5 mm; the structure is as follows: a plurality of insulated wire cores are twisted to form a cable core with a circular radial section; the cable core is coated with a first wrapping tape layer, and the cable core is tightly filled with filling materials; the first wrapping tape layer is sequentially wrapped with a second wrapping tape layer, an inner sheath layer, a flat aluminum wire armor layer and a third wrapping tape layer; the insulating wire core is formed by sequentially wrapping a crosslinked polyethylene insulating layer and a digital belt layer outside a solid aluminum conductor with a sector-shaped radial section; the sum of central angles of the conductors of each insulated wire core corresponding to the sector section is 360 degrees; the stranding pitch diameter ratio of the cable core is 40-50 times; the filling material is PP ropes; the first wrapping band layer is formed by wrapped non-woven fabric tapes, the second wrapping band layer is formed by wrapped water-blocking tapes, and the inner sheath layer is formed by polyethylene sheath materials; in the flat aluminum wire armor layer, the number of armor wires is not less than 24; the third wrapping band layer is formed by wrapped non-woven fabric belts.
Description
Technical Field
The utility model relates to the technical field of cables, specifically a flat aluminum wire armoured cable.
Background
The mechanical protective layer of the armored cable can be used for increasing the mechanical strength of the cable and improving the anti-corrosion capability, and is suitable for occasions which are easy to be damaged mechanically and are easy to be corroded. The laying mode of armoured cable is comparatively free, and it is common to lay the second power cable fixedly. The armored cable has the natural advantages of mechanical protection such as enhanced tensile strength and compressive strength, prolonged service life and the like.
The armor layer of common armoured cable adopts round steel silk etc. to make, and its drawback mainly has:
1. for installation and laying places (such as pipelines, bridges and the like) with stricter external diameter limitation, the external diameter of the round steel wire armored cable with the same specification (conductor current-carrying capacity) structure is larger;
2. the increase of the outer diameter means more material consumption and higher cost, so that the material cost of the round steel wire armored cable outer sheath with the same specification structure is higher, and the overall cost is higher;
3. the round steel wire has magnetism, and is easy to generate magnetic loss in use occasions, particularly under an alternating electric field.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the invention provides a flat aluminum wire armored cable, and the outer diameter range of the flat aluminum wire armored cable is 66.5-70.5 mm.
This flat aluminum wire armoured cable's structure does: a plurality of insulated wire cores are twisted to form a cable core with a circular radial section; the cable core is coated with a first wrapping tape layer, and the cable core is tightly filled with filling materials; the first wrapping tape layer is sequentially wrapped with a second wrapping tape layer, an inner sheath layer, a flat aluminum wire armor layer and a third wrapping tape layer;
the insulating wire core is formed by sequentially wrapping a crosslinked polyethylene insulating layer and a digital belt layer outside a solid aluminum conductor with a sector-shaped radial section; the sum of central angles of the conductors of each insulated wire core corresponding to the sector section is 360 degrees; the cross-sectional area of the solid aluminum conductor is determined by the current carrying capacity of the cable in use.
The stranding pitch diameter ratio of the cable core is 40-50 times; the filling material is PP ropes;
the first wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.18-0.25 mm, and the wrapping overlapping rate is not less than 10%;
the second wrapping band layer is formed by wrapped water-blocking tapes, the thickness of each water-blocking tape is 0.2-0.3 mm, and the wrapping overlapping rate is not less than 25%;
the inner sheath layer is made of polyethylene sheath materials, and the thickness of the inner sheath layer is not less than 1.24 mm;
in the flat aluminum wire armor layer, flat aluminum wires are used as armor wires; on the cross section of the armor wire, the thickness is 1.76-1.84 mm, and the width is 6.36-6.44 mm; the stranding direction of the armor wires is opposite to that of the cable core; the number of the armor wires is not less than 24;
the third wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.30-0.36 mm, and the wrapping overlapping rate is not less than 10%;
in the insulated wire core, the thickness of the crosslinked polyethylene insulated layer is not less than 1.52 mm.
Specifically, the outer diameter of the flat aluminum wire-armored cable was 68.5 mm. Then:
the nominal thickness of the nonwoven strip of the first wrapping layer was 0.2 mm.
The water-blocking tape of the second wrapping tape layer was a double-sided insulating water-blocking tape with a nominal thickness of 0.35 mm.
The nominal thickness of the inner sheath layer is 1.8 mm.
In the flat aluminum wire armor layer, the cross-sectional dimension of armor wires is: nominal thickness is 1.8mm, nominal width is 6.4mm, 28 armouring wires; the stranding direction of the armor wires is the left direction; the density of the armouring wire is 2.7g/cm3。
The nominal thickness of the non-woven fabric strip of the third wrapping band layer is 0.3 mm;
in the insulated wire core, the nominal thickness of the crosslinked polyethylene insulating layer is 1.8mm, and the nominal thickness of the digital tape layer is 0.1 mm.
1. Compare with the round aluminum wire and the steel wire armoured cable of specification structure, the technical advantage of flat aluminum wire as the armoured wire mainly has in this scheme:
1) for installation and laying places (such as pipelines, bridges and the like) with stricter external diameter limitation, the external diameters of flat aluminum wire armored cables with the same specification and structure are generally 3-5 mm smaller than those of round aluminum wires and steel wire armored cables;
2) the outer diameter is small, the material consumption is less, and the cost is lower, so that the outer sheath of the flat aluminum wire armored cable with the same specification structure has lower material cost and lower overall cost than the round aluminum wire and steel wire armored cable;
3) the round steel wire has magnetism, and magnetic loss is easy to generate in most use fields, particularly under an alternating electric field; the flat aluminum wire is non-magnetic, and does not generate magnetic loss, so that the conveying capacity is improved.
2. In the cable with the structure, the fan-shaped conductor has the technical advantages that compared with a circular conductor, the fan-shaped conductor has the advantages that the cross section is reduced, the overall outer diameter of the cable is reduced, the material consumption of each layer is less, and certain cost is saved.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic radial cross-sectional view of a typical structure of the present invention.
The labels in the figure are: the cable comprises an aluminum conductor 1, a crosslinked polyethylene insulating layer 2, a digital band layer 3, a filling material 4, a first wrapping band layer 5, a second wrapping band layer 6, an inner sheath layer 7, a flat aluminum wire armor layer 8 and a third wrapping band layer 9.
Detailed Description
The technical scheme is further explained by combining the drawings and the detailed implementation mode as follows:
referring to fig. 1, the outer diameter of the flat aluminum wire armored cable is 66.5-70.5 mm.
The structure of the flat aluminum wire armored cable is as follows: a plurality of insulated wire cores (4 in the example) are twisted to form a cable core with a circular radial section; the cable core is coated with a first wrapping tape layer 5, and the cable core is tightly filled with a filler 4; a second wrapping tape layer 6, an inner sheath layer 7, a flat aluminum wire armor layer 8 and a third wrapping tape layer 9 are sequentially wrapped outside the first wrapping tape layer;
the insulated wire core is formed by sequentially wrapping a crosslinked polyethylene insulating layer 2 and a digital belt layer 3 outside a solid aluminum conductor 1 with a sector-shaped radial section; the sum of central angles of the conductors of each insulated wire core corresponding to the sector section is 360 degrees;
the stranding pitch diameter ratio of the cable core is 40-50 times; the filling material is PP ropes;
the first wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.18-0.25 mm, and the wrapping overlapping rate is not less than 10%;
the second wrapping band layer is formed by wrapped water-blocking tapes, the thickness of each water-blocking tape is 0.2-0.3 mm, and the wrapping overlapping rate is not less than 25%
The inner sheath layer is made of polyethylene sheath materials, and the thickness of the inner sheath layer is not less than 1.24 mm;
in the flat aluminum wire armor layer, flat aluminum wires are used as armor wires; on the cross section of the armor wire, the thickness is 1.76-1.84 mm, and the width is 6.36-6.44 mm; the stranding direction of the armor wires is opposite to that of the cable core; the number of the armor wires is not less than 24;
the third wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.30-0.36 mm, and the wrapping overlapping rate is not less than 10%;
in the insulated wire core, the thickness of the crosslinked polyethylene insulated layer is not less than 1.52 mm.
In this example: the outer diameter range of the four-core flat aluminum wire armored cable is 68.5 mm.
The nominal thickness of the non-woven tape of the first wrapping layer is 0.2 mm;
the water-blocking tape of the second wrapping tape layer is a double-sided insulating water-blocking tape, and the nominal thickness of the water-blocking tape is 0.35 mm;
the nominal thickness of the inner jacket layer is 1.8 mm;
the nominal thickness of the non-woven fabric strip of the third wrapping band layer is 0.3 mm;
in the flat aluminum wire armor layer, the cross-sectional dimension of armor wires is: nominal thickness is 1.8mm, nominal width is 6.4mm, 28 armouring wires; the stranding direction of the armor wires is the left direction; the density of the armouring wire is 2.7g/cm3。
In the insulated wire core, the nominal thickness of the crosslinked polyethylene insulating layer is 1.8mm, and the nominal thickness of the digital tape layer is 0.1 mm.
Compared with a round steel wire armored cable, the flat aluminum wire armored cable with the same specification has the advantages of small outer diameter, low overall cost, no magnetic loss and improved conveying capacity.
After detection, the main performance parameters of the cable of the embodiment are as follows:
1. the mechanical property requirements of the solid conductor are as follows: tensile strength of not more than 70.0N/mm2And an elongation at break of not less than 25%.
2. The DC resistance of the solid aluminum conductor is required to be not more than 0.0955 omega/km.
3. Insulating thermal extension: 200 ℃, 15min, 0.2N/mm2Condition, maximum elongation under load 175%, maximum permanent elongation after cooling 15%.
4. Insulating thermal shrinkage: 130 ℃, 200mm length between marks, 1h duration and 4% maximum shrinkage.
5. Mechanical properties before and after insulation aging: the tensile strength before aging is not less than 12.5MPa, and the elongation at break is not less than 200%; after aging at 135 ℃ for 168 hours, the change rate of the tensile strength is +/-25% at most, and the change rate of the elongation at break is +/-25% at most.
6. Insulating water absorption: at 85 deg.C, lasting for 336h, and weight increment of 1mg/cm2。
7. Mechanical properties of the inner sheath before and after aging: the tensile strength before aging is not less than 12.5MPa, and the elongation at break is not less than 300%; and after aging for 240 hours at 110 ℃, the elongation at break is not less than 300%.
8. Contracting the inner sheath: heating at 80 ℃ for 5h, 5 cycles, maximum allowed shrinkage of 3%.
9. High-temperature pressure of the inner sheath: heating at 110 deg.C for 6h, and the ratio of indentation depth/average thickness is 50% at most.
10. Number of flat aluminum wire armours: not less than 24.
11. The armor direction of the flat aluminum wire is as follows: and the left direction.
12. The size of the flat aluminum wire is as follows: nominal thickness 1.8mm x nominal width 6.4 mm.
13. Flat aluminum wire armor layer 20 ℃ direct current resistance: not more than 0.1139 omega/km.
Claims (6)
1. A flat aluminum wire armored cable is characterized in that the outer diameter range of the flat aluminum wire armored cable is 66.5-70.5 mm;
the structure of the flat aluminum wire armored cable is as follows: a plurality of insulated wire cores are twisted to form a cable core with a circular radial section; the cable core is coated with a first wrapping tape layer, and the cable core is tightly filled with filling materials; the first wrapping tape layer is sequentially wrapped with a second wrapping tape layer, an inner sheath layer, a flat aluminum wire armor layer and a third wrapping tape layer;
the insulating wire core is formed by sequentially wrapping a crosslinked polyethylene insulating layer and a digital belt layer outside a solid aluminum conductor with a sector-shaped radial section; the sum of central angles of the conductors of each insulated wire core corresponding to the sector section is 360 degrees;
the stranding pitch diameter ratio of the cable core is 40-50 times; the filling material is PP ropes;
the first wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.18-0.25 mm, and the wrapping overlapping rate is not less than 10%;
the second wrapping band layer is formed by wrapped water-blocking tapes, the thickness of each water-blocking tape is 0.2-0.3 mm, and the wrapping overlapping rate is not less than 25%;
the inner sheath layer is made of polyethylene sheath materials, and the thickness of the inner sheath layer is not less than 1.24 mm;
in the flat aluminum wire armor layer, flat aluminum wires are used as armor wires; on the cross section of the armor wire, the thickness is 1.76-1.84 mm, and the width is 6.36-6.44 mm; the stranding direction of the armor wires is opposite to that of the cable core; the number of the armor wires is not less than 24;
the third wrapping band layer is formed by a wrapped non-woven fabric belt, the thickness of the non-woven fabric belt is 0.30-0.36 mm, and the wrapping overlapping rate is not less than 10%;
in the insulated wire core, the thickness of the crosslinked polyethylene insulated layer is not less than 1.52 mm.
2. The flat aluminum wire armored cable of claim 1, wherein the outer diameter of the flat aluminum wire armored cable is in the range of 68.5 mm.
3. The flat aluminum wire armored cable of claim 2, wherein the non-woven tape of the first wrapping layer has a nominal thickness of 0.2 mm;
the water-blocking tape of the second wrapping tape layer is a double-sided insulating water-blocking tape, and the nominal thickness of the water-blocking tape is 0.35 mm;
the nominal thickness of the inner jacket layer is 1.8 mm;
the nominal thickness of the nonwoven strip of the third wrapping layer was 0.3 mm.
4. The flat aluminum wire armored cable of claim 2, wherein in the flat aluminum wire armor layer, the cross-sectional dimension of the armor wires is as follows: nominal thickness is 1.8mm, nominal width is 6.4mm, 28 armouring wires; the stranding direction of the armor wires is the left direction; the density of the armouring wire is 2.7g/cm3。
5. The flat aluminum wire armored cable of claim 2, wherein the crosslinked polyethylene insulation layer of the insulation core has a nominal thickness of 1.8mm, and the digital tape layer has a nominal thickness of 0.1 mm.
6. The flat aluminum wire armored cable of claim 1 or 2, wherein the filler is PP cords.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791541.6U CN214796872U (en) | 2021-04-16 | 2021-04-16 | Flat aluminum wire armored cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791541.6U CN214796872U (en) | 2021-04-16 | 2021-04-16 | Flat aluminum wire armored cable |
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| CN214796872U true CN214796872U (en) | 2021-11-19 |
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| CN202120791541.6U Active CN214796872U (en) | 2021-04-16 | 2021-04-16 | Flat aluminum wire armored cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864142A (en) * | 2022-06-21 | 2022-08-05 | 远东电缆有限公司 | Self-bearing cable and production process thereof |
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2021
- 2021-04-16 CN CN202120791541.6U patent/CN214796872U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864142A (en) * | 2022-06-21 | 2022-08-05 | 远东电缆有限公司 | Self-bearing cable and production process thereof |
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