CN201222378Y - Medium-pressure power cable with water tree resistance performance - Google Patents
Medium-pressure power cable with water tree resistance performance Download PDFInfo
- Publication number
- CN201222378Y CN201222378Y CNU2008200367078U CN200820036707U CN201222378Y CN 201222378 Y CN201222378 Y CN 201222378Y CN U2008200367078 U CNU2008200367078 U CN U2008200367078U CN 200820036707 U CN200820036707 U CN 200820036707U CN 201222378 Y CN201222378 Y CN 201222378Y
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- power cable
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- pressure power
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Abstract
The utility model relates to a medium-pressure power cable with water-tree-retardant property, wherein a conductor shielding layer, an insulating layer and an insulated shielding layer are extruded on the periphery of the conductor in a three-layer co-extruding mode, and an insulated cable core is formed by the conductor, the conductor shielding layer, the insulating layer and the insulated shielding layer. A copper strip metal shielding layer is wound on the periphery of the insulted cable core, one layer of water-resisting layer is tightly wound on the periphery of the copper strip metal shielding layer, and one layer of outer sheath is extruded on the outer periphery of the water-resisting layer. The three layers of co-extruding layer, the water-resisting layer and the outer sheath layer are processed by materials with water-tree-retardant insulating material or with water-proof function. The utility model has the advantages of excellent electric property and excellent water-tree-retardant property, which can effectively avoid generating insulating water tree, and can greatly improve the service span of cables, and has water-tree-retardant property.
Description
Technical field
The utility model relates to a kind of medium-pressure power cable with anti-water tree property, belongs to technical field of electric wires and cables.
Background technology
At present, common crosslinked polyetylene insulated, the pvc sheath of the general employing of known mesohigh power cable.This class insulating material easily produces water tree (tubular water tree, knot shape water tree).Some microchannels that the water tree develops into when having moisture, electric stress and some risk factor (impurity, projection, space charge or ion) exactly in insulation.Under the cable high-temperature operation, the water tree causes water absorption to increase in the significant oxidation of the inner generation of insulation, and conductivity increases, and finally makes cable by thermal breakdown.Even at low temperatures, under the effect of electric field force, moisture content can move to high direction of an electric field from low electric field by the microchannel, makes moisture content form the water tree in insulation, and the water tree is through the long period oxidation or transform into the electricity tree, also can cause the destruction to cable insulation.Particularly when cable long period of soaking in water or when being in wet environment, if there is not good anti-water tree crosslinked polyethylene insulation material, to make insulation produce cracking, oxidation and degraded so, destroyed insulation system, i.e. Jue Yuan water tree aging, thereby cause insulation destroyed, will shorten the useful life of cable so greatly.The water tree aging is the main ageing form of crosslinked cable, so the cable in the water environment that is laid in all needs insulating material to have good water tree resistant property.
Summary of the invention
The purpose of this utility model provides a kind of good electric property, water tree resistant property is good, and the generation of the water tree that can effectively avoid insulating can increase substantially the cable medium-pressure power cable with anti-water tree property in useful life.
The technical solution of the utility model is: the conductor periphery extrudes conductor shield, insulating barrier and insulation screen in three-layer co-extruded mode.Conductor and conductor shield, insulating barrier, insulation screen are formed insulated wire cores.At the peripheral wrapped copper strips metal screen layer of insulated wire cores.At the peripheral tight wrapped one deck water blocking layer of copper strips metal screen layer.Extrude one deck oversheath in the water blocking layer periphery.
Described conductor shield is selected super clean anti-water tree crosslinked polyethylene insulation material for use.
Described insulating barrier is selected the inner shield semiconductive material for use.
Described insulation screen is selected the insulation shielding semiconductive material for use.
Described water blocking layer is selected the good strap that blocks water of block-water performance for use.
Described oversheath is selected for use has the radially high density water resistant polyurea vinyl material of water stop function.
Three-layer co-extruded layer described in the utility model, water blocking layer and oversheath all use the materials processing that has water-tree retardant insulating materials or have a water stop function to be made.So both guarantee water soluble ion content and the requirement of ash content conformance with standard regulation in the semiconductive conductor screen layered material carbon black, avoided the generation of water tree in the cable insulation, guaranteed the water stop function that cable is good simultaneously again.Present technique can be used for the power cable of each electric pressure of 6～35kV.
The beneficial effects of the utility model have provided a kind of good electric property, water tree resistant property is good, and the generation of the water tree that can effectively avoid insulating can increase substantially the cable medium-pressure power cable with anti-water tree property in useful life.
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, conductor, 2, conductor shield, 3, insulating barrier, 4, insulation screen, 5, insulated wire cores, 6, the copper strips metal screen layer, 7, water blocking layer, 8, oversheath.
Embodiment
Embodiment as shown in the figure is as follows.
Conductor 1 periphery extrudes conductor shield 2, insulating barrier 3 and insulation screen 4 in three-layer co-extruded mode.Conductor 1 and conductor shield 2, insulating barrier 3, insulation screen 4 are formed insulated wire cores 5.At insulated wire cores 5 peripheral wrapped copper strips metal screen layers 6.At copper strips metal screen layer 6 peripheral tight wrapped one deck water blocking layers 7.Extrude one deck oversheath 8 in water blocking layer 7 peripheries.
Described conductor shield 2 is selected super clean anti-water tree crosslinked polyethylene insulation material for use.
Described insulating barrier 3 is selected the inner shield semiconductive material for use.
Described insulation screen 4 is selected the insulation shielding semiconductive material for use.
Described water blocking layer 7 is selected the good strap that blocks water of block-water performance for use.
Described oversheath 8 is selected for use has the radially high density water resistant polyurea vinyl material of water stop function.
Claims (6)
1, a kind of medium-pressure power cable with anti-water tree property, it is characterized in that: the conductor periphery extrudes conductor shield, insulating barrier and insulation screen in three-layer co-extruded mode, conductor and conductor shield, insulating barrier, insulation screen are formed insulated wire cores, at the peripheral wrapped copper strips metal screen layer of insulated wire cores, at the peripheral tight wrapped one deck water blocking layer of copper strips metal screen layer, extrude one deck oversheath in the water blocking layer periphery.
2, a kind of medium-pressure power cable with anti-water tree property according to claim 1 is characterized in that: conductor shield is selected super clean anti-water tree crosslinked polyethylene insulation material for use.
3, a kind of medium-pressure power cable with anti-water tree property according to claim 1, it is characterized in that: insulating barrier is selected the inner shield semiconductive material for use.
4, a kind of medium-pressure power cable with anti-water tree property according to claim 1, it is characterized in that: insulation screen is selected the insulation shielding semiconductive material for use.
5, a kind of medium-pressure power cable with anti-water tree property according to claim 1, it is characterized in that: water blocking layer is selected the good strap that blocks water of block-water performance for use.
6, a kind of medium-pressure power cable with anti-water tree property according to claim 1, it is characterized in that: oversheath is selected for use has the radially high density water resistant polyurea vinyl material of water stop function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200367078U CN201222378Y (en) | 2008-05-20 | 2008-05-20 | Medium-pressure power cable with water tree resistance performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200367078U CN201222378Y (en) | 2008-05-20 | 2008-05-20 | Medium-pressure power cable with water tree resistance performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222378Y true CN201222378Y (en) | 2009-04-15 |
Family
ID=40575881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200367078U Expired - Fee Related CN201222378Y (en) | 2008-05-20 | 2008-05-20 | Medium-pressure power cable with water tree resistance performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201222378Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137266A (en) * | 2011-11-25 | 2013-06-05 | 人民电器集团上海有限公司 | Method for manufacturing power cables |
| CN104575762A (en) * | 2013-10-13 | 2015-04-29 | 宁夏海洋线缆有限公司 | Fire-resistant shielding cable |
| CN104877221A (en) * | 2015-06-09 | 2015-09-02 | 中利科技集团股份有限公司 | Medium-pressure water-tree-retardant crosslinked polyethylene cable material and cable using cable material |
| CN108461196A (en) * | 2018-04-20 | 2018-08-28 | 山东森联能源科技有限公司 | A kind of anticorrosive, stretch-proof, direct-burried water-resisting medium-voltage cable |
-
2008
- 2008-05-20 CN CNU2008200367078U patent/CN201222378Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137266A (en) * | 2011-11-25 | 2013-06-05 | 人民电器集团上海有限公司 | Method for manufacturing power cables |
| CN104575762A (en) * | 2013-10-13 | 2015-04-29 | 宁夏海洋线缆有限公司 | Fire-resistant shielding cable |
| CN104877221A (en) * | 2015-06-09 | 2015-09-02 | 中利科技集团股份有限公司 | Medium-pressure water-tree-retardant crosslinked polyethylene cable material and cable using cable material |
| CN108461196A (en) * | 2018-04-20 | 2018-08-28 | 山东森联能源科技有限公司 | A kind of anticorrosive, stretch-proof, direct-burried water-resisting medium-voltage cable |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20160520 |