CN203721348U - Water-blocking shielding layer for power cable - Google Patents
Water-blocking shielding layer for power cable Download PDFInfo
- Publication number
- CN203721348U CN203721348U CN201320836180.8U CN201320836180U CN203721348U CN 203721348 U CN203721348 U CN 203721348U CN 201320836180 U CN201320836180 U CN 201320836180U CN 203721348 U CN203721348 U CN 203721348U
- Authority
- CN
- China
- Prior art keywords
- water
- blocking
- power cable
- copper wires
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052802 copper Inorganic materials 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 238000004078 waterproofing Methods 0.000 claims description 8
- 229910001369 Brass Inorganic materials 0.000 claims description 6
- 239000010951 brass Substances 0.000 claims description 6
- 238000009954 braiding Methods 0.000 claims description 3
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract 1
- 239000006223 plastic coating Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model provides a water-blocking shielding layer for a power cable. The layer comprises at least one layer of space-wound annealed copper wires. At least one water-blocking rope or water-blocking yarn bundle is arranged between any two adjacent copper wires. Water-blocking bands braided from copper wires and water-blocking yarns wind around the outer side and the inner side of the space-wound shielding copper wires. The diameter of each water-blocking rope or yarn bundle is the same as or greater than 5% - 15% of that of each copper wire. A metal armor layer, preferably an aluminum-plastic composite tape with plastic coatings on two sides, wraps the space-wound annealed copper wires longitudinally. As every two adjacent copper wires are twisted with at least one water-blocking rope or yarn bundle therebetween, the soft water-blocking rope or yarn bundle can fill the gap between the copper wires, so that water blocking is continuous, uniform and reliable. Moisture is effectively prevented from immersing along the longitudinal direction of a conductor, and the service life of a cable and the reliability of electric power operation are ensured.
Description
Technical field
The utility model relates to power cable field, specifically a kind of screen that blocks water for power cable.
Background technology
The intrusion of moisture is power cable often, especially middle high-pressure electric power cable suffer to destroy, useful life affected main cause.It is mainly to invade cable from the sheath of cable and the end of cable that moisture immerses approach, causes oxidation, the corrosion of conductor, thereby affects the electrical property of cable, and abnormal broken line accident even occurs; Moisture infiltrates insulating barrier, and under the effect of highfield, insulating barrier can produce " water tree ", and the electricity that accelerates cable is aging, causes cable breakdown accident, reduces cable useful life; Moisture infiltrates metal screen layer
In power cable, metallic shield is the requisite structure of one deck, rated voltage U
0for 1kV and above cable all should have metal screen layer.Metallic shield has two kinds of brass wire shielding and copper strip shieldings, rated voltage be 21kV and more than, nominal cross is 500mm simultaneously
2and above cable, or the high occasion of shielding requirements, metal screen layer must adopt brass wire shielding structure.In prior art, brass wire shielding by one deck or two-layer different directions dredge around annealed copper wire form, tighten with opposite direction copper wire or copper strips on its surface.During the sparse winding of the especially two-layer different directions of the flexible conductor of sparse winding, and the copper wire or the copper strips that are used for tightening in the other direction, surface and out-of-flatness thereof, sheath subsequently extrude or winding process in, capital produces larger gap, thereby make moisture invade cable from the sheath of cable and the end of cable, infringement metal screen layer, insulating barrier and conductor.The disclosed Water-proof medium voltage interlink cable of Chinese patent CN97247583.4 is provided with semiconductive water blocking layer inside and outside shielding layer of copper wires, and its outer vertical bag one side plastic-coated metal compound belt again, to play radial water-resisting effect.Although can reducing moisture, this structure infiltrates, but can not solve longitudinal water-blocking, the semiconductive water blocking layer being provided with inside and outside shielding layer of copper wires is in wrapped process, existence due to twisting resistance, tractive effort, tension force etc. in the course of processing, the semiconductive lapping layer that blocks water can be tightened, and can not fill the gap between copper wire completely; And vertical bag one side plastic-coated metal compound belt, vertical job contract skill needs independent process equipment, has also increased production process.
Utility model content
The utility model, in order to solve the problem of prior art, provides the gap screen that blocks water for power cable little, reliable, easy to process between a kind of copper wire.
The utility model comprise one deck at least dredge around annealed copper wire, between adjacent two annealed copper wires, be filled with at least one waterproofing rope or water blocking yarn bundle.
Further improve, described dredging inside and outside shielding copper cash is all surrounded with waterstop.
Further improve, described waterstop is that copper wire and water blocking yarn braiding form.
Further improve, described waterproofing rope or water blocking yarn beam diameter are identical with copper wire.
Further improve, described waterproofing rope or water blocking yarn beam diameter are greater than the 5%-15% of brass wire diameter.
Further improve, the armour that belongs to covered with gold leaf is indulged in described dredging around annealed copper wire outward.
Further improve the aluminium-plastic tape that described metal armouring layer is double plastic-coated.
The utility model beneficial effect is:
1, between every two copper cash, there are at least one waterproofing rope or the stranded winding of water blocking yarn Shu Yiqi, the gap that soft waterproofing rope or water blocking yarn bundle can fully be filled copper wire, block water continuous, even, reliable, the moisture that can effectively block water prolongs longitudinal immersion of conductor, has guaranteed the reliability of cable life and operation power.
2, easy to process, can in the stranded process of copper wire, process simultaneously, do not need to increase manufacturing facilities.
Accompanying drawing explanation
Fig. 1 is the individual layer annealed copper wire shielding layer structure schematic diagram that blocks water.
Fig. 2 is the double-deck annealed copper wire shielding layer structure schematic diagram that blocks water.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Individual layer annealed copper wire blocks water shielding layer structure as shown in Figure 1, comprise one deck dredge around annealed copper wire 3, between adjacent two annealed copper wires 3, be filled with water blocking yarn bundle 4.Dredge and inside and outside shielding copper cash, to be all surrounded with the waterstop 2 that copper wire and water blocking yarn braiding form.Wherein, water blocking yarn bundle 4 diameters are greater than 10% of brass wire diameter.
Described dredges around the outer vertical armour 5 that belongs to covered with gold leaf of annealed copper wire 3.The aluminium-plastic tape that described metal armouring layer 5 is double plastic-coated.
Double-deck annealed copper wire blocks water shielding layer structure as shown in Figure 2, on individual layer annealed copper wire blocks water the basis of shielding layer structure, has increased one deck annealed copper wire 3, and all the other structures and the individual layer annealed copper wire shielding layer structure that blocks water is identical.
The concrete application approach of the utility model is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.
Claims (7)
1. the screen that blocks water for power cable, is characterized in that: comprise one deck at least dredge around annealed copper wire (3), between adjacent two annealed copper wires (3), be filled with at least one waterproofing rope or water blocking yarn bundle (4).
2. the screen that blocks water for power cable according to claim 1, is characterized in that: described dredging inside and outside shielding copper cash is all surrounded with waterstop (2).
3. the screen that blocks water for power cable according to claim 1, is characterized in that: described waterstop (2) forms for copper wire and water blocking yarn braiding.
4. the screen that blocks water for power cable according to claim 1, is characterized in that: described waterproofing rope or water blocking yarn bundle (4) diameter are identical with copper wire.
5. the screen that blocks water for power cable according to claim 1, is characterized in that: described waterproofing rope or water blocking yarn bundle (4) diameter are greater than the 5%-15% of brass wire diameter.
6. the screen that blocks water for power cable according to claim 1, is characterized in that: described dredge vertical genus armour (5) covered with gold leaf around annealed copper wire (3) outside.
7. the screen that blocks water for power cable according to claim 6, is characterized in that: described metal armouring layer (5) is the aluminium-plastic tape of double plastic-coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836180.8U CN203721348U (en) | 2013-12-18 | 2013-12-18 | Water-blocking shielding layer for power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836180.8U CN203721348U (en) | 2013-12-18 | 2013-12-18 | Water-blocking shielding layer for power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203721348U true CN203721348U (en) | 2014-07-16 |
Family
ID=51160486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320836180.8U Expired - Lifetime CN203721348U (en) | 2013-12-18 | 2013-12-18 | Water-blocking shielding layer for power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203721348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810333A (en) * | 2014-12-31 | 2016-07-27 | 深圳市联嘉祥科技股份有限公司 | Single-core flexible waterproof cable and production method thereof |
-
2013
- 2013-12-18 CN CN201320836180.8U patent/CN203721348U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810333A (en) * | 2014-12-31 | 2016-07-27 | 深圳市联嘉祥科技股份有限公司 | Single-core flexible waterproof cable and production method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
|
| CX01 | Expiry of patent term |