CN201111995Y - 6 to 35kV water-resistant power cable - Google Patents
6 to 35kV water-resistant power cable Download PDFInfo
- Publication number
- CN201111995Y CN201111995Y CNU2007200469927U CN200720046992U CN201111995Y CN 201111995 Y CN201111995 Y CN 201111995Y CN U2007200469927 U CNU2007200469927 U CN U2007200469927U CN 200720046992 U CN200720046992 U CN 200720046992U CN 201111995 Y CN201111995 Y CN 201111995Y
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- CN
- China
- Prior art keywords
- water
- impervious
- copper
- layer
- power cable
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- 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 - Fee Related
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Abstract
The utility model relates to a 6 to 35kV impervious power cable which comprises a copper conductor, an insulation layer, a metal shielding layer and an outer sheath, wherein, the copper conductor adopts a structure of a plurality of copper wires being closely pressed and twisted; impervious materials are filled between copper wires; an insulation layer is extruded at the surroundings of the copper conductor and the impervious materials in a way of triple extrusions to form an insulated core; a layer of impervious cloth tape I, a copper tape shielding layer and a layer of impervious cloth tape II are winded at the surrounding of the insulated core from the center to the outside in sequence; a medium density polyethylene outer sheath with radial impervious functions is extruded at the surrounding of the impervious cloth tape II. The 6 to 35kV impervious power cable has the advantages that the 6 to 35kV impervious power cable with good electric properties and impervious properties is provided and prevents the water tree phenomenon from happening at the insulation layer, thus greatly improving the service life of the cable.
Description
Affiliated technical field
The utility model relates to a kind of 6～35kV water-resistant power cable, belongs to technical field of electric wires and cables.
Background technology
At present, common crosslinked polyetylene insulated, the pvc sheath power cable of general employing in known 6～35kV electric power system.This series products vertically blocks water and radially block-water performance is all relatively poor, and its insulating barrier easily produces the water tree, under the high temperature, in the insulating barrier water tree significant oxidation may take place, and causes water absorption to increase, and conductivity increases, final thermal breakdown.Even at low temperatures, the insulating barrier water tree is through the long period oxidation or be converted into electric branch, also can cause the damage of insulating barrier.Particularly long-term in water or the cable of working in the wet environment, if there is not good block-water performance, the water tree that more is easy to generate insulating barrier is aging, thereby causes the damage of insulating barrier, will shorten the useful life of cable so greatly.
Summary of the invention
The purpose of this utility model provides a kind of good electric property, block-water performance is good, can avoid the generation of insulating barrier water tree, increases substantially cable 6～35kV water-resistant power cable in useful life thereby reach.
The technical solution of the utility model is: copper conductor is selected the many stranded structures of pressing of copper wire for use.Between each copper wire, be filled with material water-proof material.Extrude layer insulating composition insulated wire cores at copper conductor and material water-proof material periphery in three-layer co-extruded mode.From inside to outside wrapped successively one deck strap I, one deck copper strips metal screen layer and one deck strap II that blocks water that blocks water in the insulated wire cores periphery.Extrude one deck in the strap II periphery that blocks water and have the radially medium density polyethylene oversheath of water stop function.
The beneficial effects of the utility model are: recharge one deck material water-proof material in the middle of after twisted copper conductors is pressed operation through per pass, insulated wire cores inside is infiltrated in the space that can avoid aqueous vapor to pass through between the conductor monofilament like this.Simultaneously can guarantee that also conductor DC resistance meets the national Specification requirement.At the wrapped respectively one deck in the inside and outside two sides of metal screen layer strap that blocks water, originally block water and contain a kind of chance water expandable material in the cloth carrying material, after moisture content enters from cable socket or from the sheath defective, this cloth carrying material that blocks water will be met water and be expanded prevention moisture content rapidly along vertically further diffusion of cable, has so just improved vertical block-water performance of cable effectively.Have the radially medium density polyethylene oversheath of water stop function because of having used again, thereby guaranteed the radially block-water performance that cable is good.This cable can be widely used on the power cable of each electric pressure of 6～35kV.Particularly can be widely used in long-term in water or on the power cable of each electric pressure of 6～35kV of working in the wet environment.Eventually the above the utility model has the advantages that that a kind of good electric property, block-water performance are provided is good, can avoid the generation of insulating barrier water tree, increases substantially cable 6～35kV water-resistant power cable in useful life thereby reach.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, copper conductor, 2, material water-proof material, 3, insulating barrier, 4, insulated wire cores, 5, the strap I that blocks water, 6, metal screen layer, 7, the strap II that blocks water, 8, oversheath.
Embodiment
Present embodiment is that example illustrates the mode of executing in fact with single power cable.
A kind of 6～35kV water-resistant power cable, it includes copper conductor 1, insulating barrier 3, metal screen layer 4 and oversheath 8.Wherein copper conductor 1 is selected the many stranded structures of pressing of copper wire for use.Between each copper wire, be filled with material water-proof material 2.Extrude a layer insulating 3 composition insulated wire cores 4 at copper conductor 1 and material water-proof material 2 peripheries in three-layer co-extruded mode.From inside to outside wrapped successively one deck strap I 5, one deck copper strips metal screen layer 6 and one deck strap II 7 that blocks water that blocks water in insulated wire cores 4 peripheries.Extrude one deck in strap II 7 peripheries that block water and have the radially medium density polyethylene oversheath 8 of water stop function.
Claims (1)
1, a kind of 6～35kV water-resistant power cable, it includes copper conductor, insulating barrier, metal screen layer and oversheath, it is characterized in that: copper conductor is selected the many stranded structures of pressing of copper wire for use, between each copper wire, be filled with material water-proof material, extrude layer insulating composition insulated wire cores at copper conductor and material water-proof material periphery in three-layer co-extruded mode, from inside to outside wrapped successively one deck strap I that blocks water in the insulated wire cores periphery, one deck copper strips metal screen layer and one deck strap II that blocks water extrudes one deck in the strap II periphery that blocks water and has the radially medium density polyethylene oversheath of water stop function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200469927U CN201111995Y (en) | 2007-09-03 | 2007-09-03 | 6 to 35kV water-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200469927U CN201111995Y (en) | 2007-09-03 | 2007-09-03 | 6 to 35kV water-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201111995Y true CN201111995Y (en) | 2008-09-10 |
Family
ID=39963740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200469927U Expired - Fee Related CN201111995Y (en) | 2007-09-03 | 2007-09-03 | 6 to 35kV water-resistant power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201111995Y (en) |
-
2007
- 2007-09-03 CN CNU2007200469927U patent/CN201111995Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20150903 |
|
| EXPY | Termination of patent right or utility model |