CN205303029U - From type polyethylene insulation of bearing weight of power cable that blocks water - Google Patents
From type polyethylene insulation of bearing weight of power cable that blocks water Download PDFInfo
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- CN205303029U CN205303029U CN201521012028.3U CN201521012028U CN205303029U CN 205303029 U CN205303029 U CN 205303029U CN 201521012028 U CN201521012028 U CN 201521012028U CN 205303029 U CN205303029 U CN 205303029U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model discloses a from type polyethylene insulation of bearing weight of power cable that blocks water, including the cable core, its cable core is formed by three hollow conductor transposition, the center is equipped with hosting core in the cavity inner conductor, is equipped with the semiconduction water blocking layer between hosting core and the cavity inner conductor, the rope that blocks water is filled by the department in the space of cable core, and crowded package polyethylene insulation outside the cable core crowds package radial resistivity water layer and vertical water blocking layer in proper order outside polyethylene insulation, the composite bed is moulded to crowded alclad outside the radial resistivity water layer, is equipped with the outer conductor outside the plastic -aluminum composite bed, outmost crowded packet of oversheath of cable core, the outer conductor by many conductive single wire side by side the winding form. This cable has very by force from load -carrying properties, crushing resistance, little, effectual, the higher characteristic that radially and vertically blocks water of shielding that attenuate, and cable long service life, operation such as stabilize at advantages.
Description
Technical field
This utility model belongs to power cable field, is specifically related to a kind of from bearing type polyethylene insulation water-resistant power cable.
Background technology
The application history of existing thirties years of domestic crosslinked polyethylene (XLPE) insulated power cable, because of the electrically and mechanically physical property that it is good, and have that production technology is simple, portable construction, transmission capacity big, mounting and installation and maintaining is convenient, not by advantages such as drop are limited, be widely used in power system.
The nineties in last century, certain iron and steel corporation domestic was once investigated by expert, it has been found that the crosslinked cable laid the eighties, and owing to not adopting good stop water, cable cannot run, and cable is not reaching to 30 years of designing requirement service life. Through to failure cable dissection and analysis, its main cause is that XLPE cable is laying and run duration, and moisture or moisture can penetrate into along cable longitudinally and radially gap, causes XLPE insulation to generate water tree under working voltage. Namely water tree grows into certain length can cause permanent electric branch defect at water tree tip, ultimately results in cable insulation and punctures.
According to statistics, in domestic grid power system, do not adopt the result that well blocks water because of cable, it is common to after running 8��12 years, grow a large amount of water tree, breakdown accident occurs, has a strong impact on the safe operation of electrical network. Therefore, the cable technology that blocks water all had very important significance for the reliability and the life-span that ensure XLPE cable.
Utility model content
The purpose of this utility model be to provide a kind of have very strong from load-carrying properties, crushing resistance, decay little, shield effectiveness good, has higher radially and longitudinally water resistance characteristic, cable long service life, stable from bearing type polyethylene insulation water-resistant power cable.
One described in the utility model is from bearing type polyethylene insulation water-resistant power cable, and including cable core, its cable core is formed by three hollow conductor are stranded; In hollow inner conductor, center is provided with carrying core, is provided with semiconductive water blocking layer between carrying core and hollow inner conductor;Fill waterproofing rope in the gap of cable core, outside cable core, extrude polyethylene layer, outside polyethylene layer, extrude radial resistivity water layer and longitudinal water-blocking layer successively; Extruding plastic-aluminum combined layer outside radial resistivity water layer, be externally provided with outer conductor at plastic-aluminum combined layer, the outermost layer of cable core extrudes oversheath; Described outer conductor is entwined side by side by many conduction single lines.
Improving further, described carrying core is zinc-coated wire, and the stress point of inner wire concentrates on center carrying core, and cable, in folding and unfolding winding process, protects inner wire annealing copper wire, and is not easily broken.
Improving further, described semiconductive water blocking layer one layer of 0.35mm thickness semiconductor waterstop of employing is overlapping wrapped to be formed, and band Duplication is the 22%��25% of bandwidth.
Improving further, described hollow inner conductor is that thin copper belt is through longitudinal tubing, the wrinkles aluminium tube welding, rolling strand.
Compared with prior art, have the beneficial effects that:
This utility model has that very strong the stress point of inner wire concentrates on center carrying core from load-carrying properties, the conductor center layer You Yigen center carrying core of cable, and cable, in folding and unfolding winding process, protects inner wire annealing copper wire, and is not easily broken;
Conductor adds semiconductor waterstop, and do not leave space, effectively stop moisture by inside conductor strand gap water inlet cable, after cable cabling and all can produce gap after wire armoring, therefore, all wrapped waterstop after its operation, it is prevented that moisture enters from intermediate gap, this utility model adopts plastic-aluminum combined integrated sheath as radial resistivity water layer, reaches, by the aluminium-plastic tape of vertical bag and the polyethylene layer combined effect extruded, the purpose that blocks water; Its mechanism that blocks water is: when extruding polyethylene layer, effect due to polyethylene melt body height moderate pressure, the polyethylene film of plastic-aluminum combined belt surface and the inner surface of polyethylene isolation layer are bondd well, and putting up between aluminum plastic composite belt longitudinal bag also obtains good bonding simultaneously; Thus preventing the infiltration of moisture, reach good block-water effect;
Adopt hollow inner conductor can save metal material, alleviate cable weight, under high-power, high frequency, due to kelvin effect, electric current is actually simply along the laminar flow that conductive surface is very thin, tubular inner conductor pipe thickness is bigger than the skin depth of electric current, and its radio-frequency resistance is actually just the same with solid conductor.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As it is shown in figure 1, one described in the utility model is from bearing type polyethylene insulation water-resistant power cable, including cable core, its cable core is formed by three hollow conductor 3 are stranded; In hollow inner conductor 3, center is provided with carrying core 1, and the stress point of inner wire concentrates on center carrying core, and cable, in folding and unfolding winding process, protects inner wire annealing copper wire, and is not easily broken; It is provided with semiconductive water blocking layer 2 between carrying core 1 and hollow inner conductor 3; Fill waterproofing rope 4 in the gap of cable core, outside cable core, extrude polyethylene layer 5, outside polyethylene layer 5, extrude radial resistivity water layer 6 and longitudinal water-blocking layer 9 successively; Extruding plastic-aluminum combined layer 7 outside radial resistivity water layer 6, be externally provided with outer conductor at plastic-aluminum combined layer 7, the outermost layer of cable core extrudes oversheath 10; Described outer conductor is entwined side by side by many conduction single lines 8.
Conductor adds semiconductor waterstop, and do not leave space, effectively stop moisture by inside conductor strand gap water inlet cable, after cable cabling and all can produce gap after wire armoring, therefore, all wrapped waterstop after its operation, it is prevented that moisture enters from intermediate gap, this utility model adopts plastic-aluminum combined integrated sheath as radial resistivity water layer, reaches, by the aluminium-plastic tape of vertical bag and the polyethylene layer combined effect extruded, the purpose that blocks water;Its mechanism that blocks water is: when extruding polyethylene layer, effect due to polyethylene melt body height moderate pressure, the polyethylene film of plastic-aluminum combined belt surface and the inner surface of polyethylene isolation layer are bondd well, and putting up between aluminum plastic composite belt longitudinal bag also obtains good bonding simultaneously; Thus preventing the infiltration of moisture, reach good block-water effect;
Adopt hollow inner conductor can save metal material, alleviate cable weight, under high-power, high frequency, due to kelvin effect, electric current is actually simply along the laminar flow that conductive surface is very thin, tubular inner conductor pipe thickness is bigger than the skin depth of electric current, and its radio-frequency resistance is actually just the same with solid conductor.
The above is only of the present utility model be preferable to carry out method; it should be pointed out that, for those skilled in the art, under the premise without departing from this utility model principle; can also making some improvement, these improvement also should be regarded as protection domain of the present utility model.
Claims (4)
1. one kind from bearing type polyethylene insulation water-resistant power cable, it is characterised in that: including cable core, its cable core is formed by three hollow conductor (3) are stranded; In hollow inner conductor (3), center is provided with carrying core (1), is provided with semiconductive water blocking layer (2) between carrying core (1) and hollow inner conductor (3); Fill waterproofing rope (4) in the gap of cable core, outside cable core, extrude polyethylene layer (5), extrude outward radial resistivity water layer (6) and longitudinal water-blocking layer (9) at polyethylene layer (5) successively; Extruding plastic-aluminum combined layer (7) outside radial resistivity water layer (6), be externally provided with outer conductor at plastic-aluminum combined layer (7), the outermost layer of cable core extrudes oversheath (10); Described outer conductor is entwined side by side by many conductions single line (8).
2. according to claim 1 from bearing type polyethylene insulation water-resistant power cable, it is characterised in that: described carrying core (1) is zinc-coated wire.
3. according to claim 1 from bearing type polyethylene insulation water-resistant power cable, it is characterised in that: described semiconductive water blocking layer (2) one layer of 0.35mm thickness semiconductor waterstop of employing is overlapping wrapped to be formed, and band Duplication is the 22%��25% of bandwidth.
4. according to claim 1 from bearing type polyethylene insulation water-resistant power cable, it is characterised in that: described hollow inner conductor (3) for thin copper belt through longitudinal tubing, weld, roll strand wrinkles aluminium tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521012028.3U CN205303029U (en) | 2015-12-09 | 2015-12-09 | From type polyethylene insulation of bearing weight of power cable that blocks water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521012028.3U CN205303029U (en) | 2015-12-09 | 2015-12-09 | From type polyethylene insulation of bearing weight of power cable that blocks water |
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| Publication Number | Publication Date |
|---|---|
| CN205303029U true CN205303029U (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521012028.3U Active CN205303029U (en) | 2015-12-09 | 2015-12-09 | From type polyethylene insulation of bearing weight of power cable that blocks water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405515A (en) * | 2015-12-09 | 2016-03-16 | 江苏荣宜电缆有限公司 | Self-bearing type polyethylene-insulating waterproof power cable |
| CN107633907A (en) * | 2017-10-18 | 2018-01-26 | 安徽迅普电缆有限公司 | A kind of novel cable |
| CN110491603A (en) * | 2019-09-09 | 2019-11-22 | 江苏亨通电力电缆有限公司 | A kind of production technology of insect-pest waterproof power cable |
-
2015
- 2015-12-09 CN CN201521012028.3U patent/CN205303029U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405515A (en) * | 2015-12-09 | 2016-03-16 | 江苏荣宜电缆有限公司 | Self-bearing type polyethylene-insulating waterproof power cable |
| CN107633907A (en) * | 2017-10-18 | 2018-01-26 | 安徽迅普电缆有限公司 | A kind of novel cable |
| CN110491603A (en) * | 2019-09-09 | 2019-11-22 | 江苏亨通电力电缆有限公司 | A kind of production technology of insect-pest waterproof power cable |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |