CN100568404C - Waterproof power cable and manufacture method - Google Patents
Waterproof power cable and manufacture method Download PDFInfo
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- CN100568404C CN100568404C CNB2007100407893A CN200710040789A CN100568404C CN 100568404 C CN100568404 C CN 100568404C CN B2007100407893 A CNB2007100407893 A CN B2007100407893A CN 200710040789 A CN200710040789 A CN 200710040789A CN 100568404 C CN100568404 C CN 100568404C
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- water
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- blocking
- power cable
- cable
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- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000004020 conductor Substances 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- 239000004698 Polyethylene Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 229920000573 polyethylene Polymers 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 8
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000010382 chemical cross-linking Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 14
- 238000004078 waterproofing Methods 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 8
- 240000005572 Syzygium cordatum Species 0.000 description 7
- 235000006650 Syzygium cordatum Nutrition 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 description 5
- 239000004703 cross-linked polyethylene Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 229910000989 Alclad Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005685 electric field effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
本发明涉及一种防水电力电缆，其特征在于①所述的防水电力电缆由三根单芯阻水电缆绞合成缆；②每根单芯阻水电缆从里到外依次由导体、阻水粉层、屏蔽层、绝缘层，绝缘屏蔽层、半导体阻水带I、金属屏蔽层、半导体阻水带II、阻水层和外护套层构成。在圆形无氧铜导体紧压绞合后表面涂抹阻水粉，阻水带I和II为纵包铝塑复合带同时挤包聚乙烯。提供的电力电缆符合GB/T12706.2的有关要求，且铝塑复合带和聚乙烯外护套间剥离力不小于1.2N/mm，充入50-100Pa干燥空气或氮气后均衡6小时，电缆的任一端气压不下降。显示出优良的径向阻水性。
The present invention relates to a waterproof power cable, which is characterized in that ① the waterproof power cable is composed of three single-core water-blocking cables; ② each single-core water-blocking cable consists of a conductor, a water-blocking powder layer, Shielding layer, insulating layer, insulating shielding layer, semiconductor water blocking tape I, metal shielding layer, semiconductor water blocking tape II, water blocking layer and outer sheath layer. Water-blocking powder is applied on the surface of the round oxygen-free copper conductor after being pressed and stranded, and the water-blocking strips I and II are longitudinally wrapped aluminum-plastic composite strips and extruded polyethylene. The provided power cable meets the relevant requirements of GB/T12706.2, and the peeling force between the aluminum-plastic composite tape and the polyethylene outer sheath is not less than 1.2N/mm. Air pressure does not drop at either end. Shows excellent radial water resistance.
Description
Technical field
The present invention relates to waterproof power cable and manufacture method, belong to field of cables.
Background technology
After finding crosslinked polyethylene (XLPE) insulation water tree aging in 1967, confirmed that it becomes one of aging main phenomenon of XLPE cable at present.
Though the mechanism of water tree and how to cause that destruction still imperfectly understands at present, great number tested data show water tree and can cause local stress to increase, may become the cradle of electric branch.Under the high temperature, in the water tree significant oxidation may take place, cause water absorption to increase, conductivity increases, final thermal breakdown; Even at low temperatures, water tree is through the long period oxidation or be converted into electric branch, also can cause the destruction of insulation.Particularly when the cable long period of soaking is in water, if there is not good waterproof construction, more to be easy to generate the water tree of insulation aging for cable so, thereby the destruction of causing insulation will be shortened life-span of cable so greatly.Cable so be laid in the water environment generally all needs cable to have waterproof construction.
Waterproof requirement to power cable also just grew up in recent years, and the requirement to waterproof in the past mainly is limited in the application of submarine cable, extra-high-tension cable and telecommunication cable.Along with insulation being absorbed water and the research of water tree and the intensification of understanding, people more and more recognize the importance of water resistance centering high voltage power cable.Higher or the long-term rainy area in level of ground water, increasing user has proposed the requirement of waterproof to cable.
Traditional water-proof cable in the stranding process in order to make cable have fire resistance characteristic, all in the space of stranding, fill a large amount of waterproofing rope, waterproofing rope costs an arm and a leg, and this structure not only makes the cost of cable significantly increase, and vertical block-water performance instability of cable.
Summary of the invention
The object of the present invention is to provide a kind of waterproof power cable and manufacture method.
As mentioned above, traditional water-proof cable in order to make cable have fire resistance characteristic, is all filled a large amount of waterproofing rope in the space of stranding in the stranding process, waterproofing rope costs an arm and a leg, this structure not only makes the cost of cable significantly increase, and vertical block-water performance instability of cable.The present invention is by the appropriate design construction of cable, make single-core cable have good block-water performance, the waterproof power cable that provides is by adopting three single cores cable twisting stranding that blocks water, reach the multicore purpose that blocks water, design certain twisting pitch simultaneously, make cable have stability preferably, the cable that blocks water so just avoids adopting waterproofing rope, do not increase simultaneously other material water-proof material, and the block-water performance of cable is better, make cable not only reduce existing production cost, and cable is because the good heat dissipation ampacity also increase many.It is a kind of ideal cheaply cable that blocks water.
Waterproof power cable provided by the present invention is by three single cores cable twisting stranding that blocks water, as shown in Figure 1, every single core cable that blocks water is made of conductor, water-proofing powder, conductor shield, insulating barrier, insulation screen, semiconductor waterstop I, metal screen layer, semiconductor waterstop II, water blocking layer and outer jacket cover from the inside to surface successively.
Wherein: conductor adopts the 2nd kind of layering of GB/T3956 regulation to press stranded round conductor, and the degree of pressing of conductor reaches more than 90%, and roundness reaches more than 98%, and conductive surface is bright and clean, no burr, cut.Water-proofing powder need be smeared in every layer of compact conductor surface, makes conductor have vertical water stop function.
Conductor screen is made up of the semi-conducting material that extrudes, and eliminates the electric field of conductive surface and concentrates, and improves cable work field intensity.
Insulating barrier is made up of the XLPE that extrudes, and uses ultra-clean level XLPE material, and insulation is extruded in outside the conductor screen, and the insulation nominal thickness meets the corresponding standard regulation, guarantees the dielectric voltage withstand performance of cable.
Insulation screen is made up of the semiconductive material that extrudes, and is extruded on the insulating barrier, plays the uniform electric field effect.
Metal screen layer is made up of copper strips, has the effect of earth shield, conducting capacitance current and short circuit current.At all wrapped semiconductive waterstop in the inside and outside surface of metallic shield, make cable have good vertical block-water performance.
Water blocking layer extrudes poly vertical pack arrangement simultaneously with vertical alclad plastic composite strip, plays radially waterproof action.
Cable jacket is made up of PVC or PE.Oversheath is generally black except that specific (special) requirements, make cable have good weather resisteant energy.
The manufacture craft of waterproof power cable provided by the invention is:
1. conductor adopts layering to press method, and every laminar surface is smeared water-proofing powder;
2. adopt catenary suspension type continuous vulcanization dry method chemical crosslinking production line to extrude conductor, screen, insulating barrier, insulation screen simultaneously;
3. at the insulated wire cores surface wrapped layer of semiconductor waterstop I of elder generation, wrapped again one deck soft copper band again at the wrapped two layers of semiconductor waterstop II of the outer surface of soft copper band, forms metal screen layer;
4. adopt two-sided aluminium-plastic tape to extrude polyethylene simultaneously and combine jacket making water blocking layer;
5. oversheath adopts polyvinyl chloride or polyethylene;
6. the last stranded cabling process of single core finished product three cores that adopts, stranded lay ratio is not more than 25.
Waterproof power cable major advantage provided by the invention is that described water-proof cable avoids adopting traditional waterproofing rope, and do not use other material water-proof material again and the block-water performance of cable is better, cost is not only reduced and also cable since the good heat dissipation ampacity also obviously increase.
The key technical indexes of waterproof power cable provided by the invention is:
1, general characteristic index: meet the GB/T12706.2 standard-required.
2, vertical water blocking test index: meet the water permeabillity test requirement of GB/T12706.2 appendix D regulation.
3, the indirect performance assessment criteria of water blocking test radially:
(1), disbonded test: be not less than 1.2N/mm between aluminium-plastic tape and polyethylene oversheath; Vertical alclad plastic composite strip lap is not less than 1.2N/mm.
(2), air test: charged into 50～100Pa dry air or nitrogen post-equalization 6 hours, the arbitrary end air pressure of cable does not descend.
Description of drawings
Fig. 1 is the structural representation of waterproof power cable provided by the invention.
Among the figure: 1 conductor, 2 water-proofing powders, 3 conductor shields, 4 insulating barriers, 5 insulation screens, 6 semiconductor waterstop I, 7 metal screen layers, 8 semiconductor waterstop II, 9 water blocking layers, 10 outer jackets
Embodiment
By following embodiment, further illustrate substantive distinguishing features of the present invention and obvious improvement, but the present invention only is confined to embodiment by no means.
The described waterproof power cable of present embodiment as shown in Figure 1, it is by three single cores cable twisting stranding that blocks water, and every single core cable that blocks water covers layer, semiconductor waterstop I, metal screen layer, semiconductor waterstop II, water blocking layer and outer jacket by conductor, water-proofing powder, conductor shield, insulating barrier, insulating barrier successively from inside to outside and constitutes.
1, conductor:
Adopt copper free wire, meet the 2 class conductor structure requirements of stipulating in the GB/T3956 standard.Conductor adopts layering to press structure, and every laminar surface need be smeared water-proofing powder, to guarantee the block-water performance of cable conductor.
2, three-layer co-extruded:
Adopt catenary suspension type continuous vulcanization dry method chemical crosslinking production line to extrude conductor shield, insulating barrier, insulation screen simultaneously, guarantee the insulation property of cable, the insulation standard thickness meets the requirement of GB/T12706.2 standard.
3, metal screen layer:
At the thick semiconductive waterstop I of the insulated wire cores surface wrapped one deck 0.2mm of elder generation, the soft copper band that wrapped again one deck 0.12mm is thick is again at the thick semiconductor waterstop II of the wrapped two layers of 0.2mm of the outer surface of soft copper band, to guarantee vertical block-water performance of cable.
4, water blocking layer:
Adopt the thick two-sided aluminium-plastic tape+polyethylene of 0.2mm to combine jacket technology, guarantee radially block-water performance of cable.
5, external sheath layer:
Adopt polyvinyl chloride or polyethylene sheath material, its standard thickness should meet the requirement of GB/T12706.2 standard.
6, stranded:
Adopt single core finished product water-proof cable three core strandings, control certain twisting pitch band directly than being not more than 25, to guarantee the stability of cable.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100407893A CN100568404C (en) | 2007-05-17 | 2007-05-17 | Waterproof power cable and manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100407893A CN100568404C (en) | 2007-05-17 | 2007-05-17 | Waterproof power cable and manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071658A CN101071658A (en) | 2007-11-14 |
| CN100568404C true CN100568404C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100407893A Expired - Fee Related CN100568404C (en) | 2007-05-17 | 2007-05-17 | Waterproof power cable and manufacture method |
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| Country | Link |
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| CN (1) | CN100568404C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204694B (en) * | 2007-12-10 | 2010-04-14 | 浙江万马电缆股份有限公司 | Cable impervious layer electrostatic painting method |
| CN102347108A (en) * | 2010-08-04 | 2012-02-08 | 北京市电力公司 | 10 kilovolt (KV) single-core stranded cluster crosslinking polyethylene insulation flame retardation power cable |
| CN102789835A (en) * | 2011-08-12 | 2012-11-21 | 上海特种电线电缆（集团）有限公司 | Environment-friendly safe waterproof fireproof cable |
| CN102881379A (en) * | 2012-10-18 | 2013-01-16 | 江苏荣宜电缆有限公司 | Waterproof power cable |
| CN103077777A (en) * | 2012-11-14 | 2013-05-01 | 湖北龙腾红旗电缆(集团)有限公司 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
| CN103035337A (en) * | 2012-11-26 | 2013-04-10 | 晶锋集团股份有限公司 | Waterproof electric power cable and manufacturing method thereof |
| CN102969090B (en) * | 2012-12-04 | 2015-04-29 | 汕头市金桥电缆有限公司 | Manufacturing method of communication cable |
| CN103886987A (en) * | 2014-04-08 | 2014-06-25 | 江西联创电缆科技有限公司 | Water blocking type bunched cable for smart antenna |
| CN104575840B (en) * | 2015-01-07 | 2016-12-07 | 安徽弘博电缆集团有限公司 | A kind of waterproofing type power cable with cross-linked polyethylene insulation |
| CN105632605B (en) * | 2016-04-05 | 2018-08-14 | 江苏亨通高压海缆有限公司 | Preparation method of waterproof submarine cable |
| CN107610833B (en) * | 2017-09-27 | 2023-05-12 | 江苏亨通高压海缆有限公司 | Conductor water-blocking device |
| CN113362986B (en) * | 2021-06-16 | 2022-03-15 | 广东中宝电缆有限公司 | A kind of single-core waterproof B1 flame-retardant fire-resistant cable for rail transit and preparation method |
-
2007
- 2007-05-17 CN CNB2007100407893A patent/CN100568404C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
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| CN101071658A (en) | 2007-11-14 |
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