CN204632417U - Water resistant tree twisted polyethylene cable - Google Patents
Water resistant tree twisted polyethylene cable Download PDFInfo
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- CN204632417U CN204632417U CN201520390246.4U CN201520390246U CN204632417U CN 204632417 U CN204632417 U CN 204632417U CN 201520390246 U CN201520390246 U CN 201520390246U CN 204632417 U CN204632417 U CN 204632417U
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- water
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- water blocking
- conductor
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Abstract
The utility model belongs to technical field of cables, especially water resistant tree twisted polyethylene cable is related to, there is single conductor and be positioned at the oversheath outside conductor, it is characterized in that conductor outer extrusion molding is coated with insulating barrier, insulating barrier is coated with screen, have outside screen to have outside sheath, sheath outside the first water blocking layer, the first water blocking layer and have the second water blocking layer, oversheath extrusion molding is coated on outside the second water blocking layer; The material of sheath and oversheath is all crosslinked polyethylene, and the maximal clearance between insulating barrier and conductor is 0.1 μm; From sheath to the first water blocking layer, the first water blocking layer is airtight and liquid-tight; On the arbitrary cross section vertical with cable axis: the center superposition of conductor, insulating barrier, screen three.The utility model has excellent, the easy production of block-water effect, does not produce the Advantageous Effects such as water is set, cable electrical property/machinery/environmental performance is more stable, more reliable.
Description
Technical field
The utility model belongs to technical field of cables, especially relates to water resistant tree twisted polyethylene cable.
Background technology
At present, the many employings of medium-pressure power cable are crosslinked polyetylene insulated, common cross-linked polyethylene insulated cable damages by mechanical stress or external force with run duration laying, or cable is in ring that is moist, that have water long-time running in the mind, capital causes outside moisture to cable internal penetration, the chance forming water tree under electric field action increases greatly, and water tree changes into permanent electric branch under electric field action, causes insulation breakdown in the short period of time.Once protective coverings of cable is destroyed, after cable water inlet, steel band, copper strip corrosion can be caused, decreasing insulating, greatly shorten cable useful life, for this reason, in industry, carry out a large amount of cable water resistant tree research.
Authorization Notice No. CN203300285U patent discloses a kind of water resistant tree crosslinked cable, comprise core, PE insulating barrier, packed layer, lapping layer, water resistant layer and restrictive coating, outer surface is enclosed with the mutual stranded formation cable conductor of several cores of PE insulating barrier, and the outer surface of cable conductor is enclosed with packed layer, lapping layer, water resistant layer and restrictive coating successively.
Authorization Notice No. CN201069676Y patent discloses the water resistant tree power cable with cross-linked polyethylene insulation that entirely blocks water, it can be single cored structure, also can be three-core structure, single cored structure be made up of water-blocking conductor 1, internal shield 2, insulating barrier 3, outer shielding layer 4, semiconductive block water outer 7, radial moisture-proof layer (8) and the outer jacket 9 of internal layer 5, metal screen layer 6, semiconductive that block water from inside to outside successively; Three-core structure by skin after three insulated wire cores 10 and gasket for packing 11 twisted synthesizing cable that blocks water be water blocking layer 12 successively, radial moisture-proof layer 8 ', outer jacket 9 ' form, water-blocking conductor 1 forms by many single metal wires 13 are stranded, at the overlapping between layers lapped insulation waterstop 14 that single metal wire 13 is stranded.It adopts longitudinal direction and radial water-resisting mode by conductor, insulating material, the construction of cable, thus the effective generation suppressing water tree in the crosslinked cable in use immersion of moisture and insulation, significantly reduce crosslinked cable failure rate.
Authorization Notice No. CN204332515U patent discloses a kind of water resistant tree crosslinked cable, comprise conductor, conductor is enclosed with smooth internal shield, cross-linked polyethylene layer, smooth outer shielding layer, metal screen layer, nonwoven fabrics, damping glue-line and external sheath layer outward successively, the surfaces externally and internally coefficient of friction of smooth internal shield is 0.1-0.2, the surfaces externally and internally coefficient of friction of smooth outer shielding layer is 0.1-0.2, smooth internal shield is for being all that aluminium foil wheat draws screen with smooth outer shielding layer, and the density of cross-linked polyethylene layer is 0.8-0.9g/cm
3, its tensile strength is 20MPa, its specific insulation is greater than 1 × 10
15Ω cm, the thickness of damping glue-line is 0.5-1mm, it is low that the coefficient of friction of described smooth internal shield and smooth outer shielding layer arranges by it as far as possible, itself and the irregular projection between conductor and cross-linked polyethylene layer, space and hole can be reduced as far as possible, effectively can reduce the development of tree discharge, even if create water tree, the continued growth that water also can be suppressed to set also suppresses it to discharge.
Utility model content
In order to solve the problem, the purpose of this utility model discloses a kind of water resistant tree twisted polyethylene cable, and it realizes by the following technical solutions.
In 1st embodiment of the present utility model, water resistant tree twisted polyethylene cable, there is single conductor and be positioned at the oversheath outside conductor, it is characterized in that conductor outer extrusion molding is coated with insulating barrier, insulating barrier is coated with screen, have outside screen to have outside sheath, sheath outside the first water blocking layer, the first water blocking layer and have the second water blocking layer, oversheath extrusion molding is coated on outside the second water blocking layer; The material of sheath and oversheath is all crosslinked polyethylene, and the maximal clearance between insulating barrier and conductor is 0.1 μm; From sheath to the first water blocking layer, the first water blocking layer is airtight and liquid-tight; On the arbitrary cross section vertical with cable axis: the center superposition of conductor, insulating barrier, screen three.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described conductor is copper or aluminium or alloy.
Further, water resistant tree twisted polyethylene cable described above, is characterized in that the cross-sectional area of described conductor is 1 ~ 6mm
2.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described insulating barrier is polyethylene or polyurethane.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described screen is steel band or copper strips or aluminium strip.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described first water blocking layer is polyethylene or polypropylene.
Water resistant tree twisted polyethylene cable described above, it is characterized in that the material of described second water blocking layer is aluminium strip or steel band or copper strips, and described second water blocking layer is longitudinally coated on outside sheath, two terminations of the second water blocking layer are welded together, from oversheath to inner sheath, the second water blocking layer is fluid-tight.
Water resistant tree twisted polyethylene cable described above, is characterized in that the thickness of described insulating barrier is 0.6 ~ 1.0mm, the thickness of the first water blocking layer is 0.2 ~ 0.6mm, the thickness of sheath is 0.6 ~ 1.2mm, the thickness of oversheath is 1.6 ~ 2.5mm.
A kind of three-core structure water resistant tree twisted polyethylene cable is disclosed in 2nd embodiment of the present utility model, it is characterized in that it includes the water resistant tree twisted polyethylene cable in three the 1st embodiments, three water resistants tree twisted polyethylene cables, in tangent placement between two, have position fixed bed outside three water resistant tree twisted polyethylene cables, extrusion molding are coated with the 3rd water blocking layer to position fixed bed, the 3rd water blocking layer is coated with the sheath that blocks water outward.
In the utility model, because conductor adopts single conductor, therefore solve and adopt stranded conductor in prior art and moisture penetration problem in the conductor gap of causing; Again because the maximal clearance between insulating barrier and conductor is 0.1 μm, therefore hydrone cannot radial penetration, and when being filled with ointment in gap, moisture more can not permeate and effectively protect conductor, makes conductor not oxidizable; The existence of first, second and presumable 3rd water blocking layer, makes moisture can not external penetration; In addition, cross-linking polyethylene materials itself is very fine and close, and moisture cannot penetrate; Therefore, in the utility model, moisture cannot penetrate into conductor, cannot form water tree; Cable performance is more stable, reliable.
Therefore, the utility model has excellent, the easy production of block-water effect, does not produce the Advantageous Effects such as water is set, cable electrical property/machinery/environmental performance is more stable, more reliable.
Accompanying drawing explanation
Fig. 1 is the cross-sectional structure schematic diagram of the utility model embodiment 1.
Fig. 2 is the cross-sectional structure schematic diagram of the utility model embodiment 2.
Embodiment
embodiment 1
Ask for an interview Fig. 1, water resistant tree twisted polyethylene cable 10, there is single conductor 1 and be positioned at the oversheath 7 outside conductor, it is characterized in that the outer extrusion molding of conductor is coated with insulating barrier 2, insulating barrier is coated with to have outside screen 3, screen to have outside sheath 5, sheath outside the first water blocking layer 4, first water blocking layer has the second water blocking layer 6, oversheath extrusion molding is coated on outside the second water blocking layer; The material of sheath and oversheath is all crosslinked polyethylene, and the maximal clearance between insulating barrier and conductor is 0.1 μm; From sheath to the first water blocking layer, the first water blocking layer is airtight and liquid-tight; On the arbitrary cross section vertical with cable axis: the center superposition of conductor, insulating barrier, screen three.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described conductor is copper or aluminium or alloy.
Further, water resistant tree twisted polyethylene cable described above, is characterized in that the cross-sectional area of described conductor is 1 ~ 6mm
2.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described insulating barrier is polyethylene or polyurethane.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described screen is steel band or copper strips or aluminium strip.
Water resistant tree twisted polyethylene cable described above, is characterized in that the material of described first water blocking layer is polyethylene or polypropylene.
Water resistant tree twisted polyethylene cable described above, it is characterized in that the material of described second water blocking layer is aluminium strip or steel band or copper strips, and described second water blocking layer is longitudinally coated on outside sheath, two terminations of the second water blocking layer are welded together, from oversheath to inner sheath, the second water blocking layer is fluid-tight.
Water resistant tree twisted polyethylene cable described above, is characterized in that the thickness of described insulating barrier is 0.6 ~ 1.0mm, the thickness of the first water blocking layer is 0.2 ~ 0.6mm, the thickness of sheath is 0.6 ~ 1.2mm, the thickness of oversheath is 1.6 ~ 2.5mm.
Water resistant tree twisted polyethylene cable described above, is characterized in that being filled with ointment in the gap between described insulating barrier and conductor.
embodiment 2
Ask for an interview Fig. 2, three-core structure water resistant tree twisted polyethylene cable, it is characterized in that it includes the water resistant tree twisted polyethylene cable in three embodiments 1, three water resistants tree twisted polyethylene cables, in tangent placement between two, have position fixed bed 80 outside three water resistant tree twisted polyethylene cables, extrusion molding are coated with the 3rd water blocking layer 81 to position fixed bed, the 3rd water blocking layer is coated with the sheath 82 that blocks water outward.
Three-core structure water resistant tree twisted polyethylene cable described above, is characterized in that the material of described position fixed bed is polyester belt or nonwoven fabrics or waterstop.
Three-core structure water resistant tree twisted polyethylene cable described above, is characterized in that the material of described 3rd water blocking layer is aluminium strip or steel band or copper strips.
Three-core structure water resistant tree twisted polyethylene cable described above, the material of the sheath that blocks water described in it is characterized in that is high density polyethylene (HDPE) or crosslinked polyethylene or polyurethane.
In the utility model, because conductor adopts single conductor, therefore solve and adopt stranded conductor in prior art and moisture penetration problem in the conductor gap of causing; Again because the maximal clearance between insulating barrier and conductor is 0.1 μm, therefore hydrone cannot radial penetration, and when being filled with ointment in gap, moisture more can not permeate and effectively protect conductor, makes conductor not oxidizable; The existence of first, second and presumable 3rd water blocking layer, makes moisture can not external penetration; In addition, cross-linking polyethylene materials itself is very fine and close, and moisture cannot penetrate; Therefore, in the utility model, moisture cannot penetrate into conductor, cannot form water tree; Cable performance is more stable, reliable.
Therefore, the utility model has excellent, the easy production of block-water effect, does not produce the Advantageous Effects such as water is set, cable electrical property/machinery/environmental performance is more stable, more reliable.
The utility model is not limited to above-mentioned preferred forms, and should be appreciated that design of the present utility model can be implemented to use by other various forms, they drop in protection range of the present utility model equally.
Claims (10)
1. water resistant tree twisted polyethylene cable, there is single conductor and be positioned at the oversheath outside conductor, it is characterized in that conductor outer extrusion molding is coated with insulating barrier, insulating barrier is coated with screen, have outside screen to have outside sheath, sheath outside the first water blocking layer, the first water blocking layer and have the second water blocking layer, oversheath extrusion molding is coated on outside the second water blocking layer; The material of sheath and oversheath is all crosslinked polyethylene, and the maximal clearance between insulating barrier and conductor is 0.1 μm; From sheath to the first water blocking layer, the first water blocking layer is airtight and liquid-tight; On the arbitrary cross section vertical with cable axis: the center superposition of conductor, insulating barrier, screen three.
2. water resistant according to claim 1 tree twisted polyethylene cable, is characterized in that the material of described conductor is copper or aluminium or alloy.
3. water resistant tree twisted polyethylene cable according to claim 2, is characterized in that the cross-sectional area of described conductor is 1 ~ 6mm
2.
4. water resistant tree twisted polyethylene cable according to claim 3, is characterized in that the material of described insulating barrier is polyethylene or polyurethane.
5. water resistant according to claim 4 tree twisted polyethylene cable, is characterized in that the material of described screen is steel band or copper strips or aluminium strip.
6. water resistant tree twisted polyethylene cable according to claim 5, is characterized in that the material of described first water blocking layer is polyethylene or polypropylene.
7. water resistant tree twisted polyethylene cable according to claim 6, it is characterized in that the material of described second water blocking layer is aluminium strip or steel band or copper strips, and described second water blocking layer is longitudinally coated on outside sheath, two terminations of the second water blocking layer are welded together, from oversheath to inner sheath, the second water blocking layer is fluid-tight.
8. water resistant tree twisted polyethylene cable according to claim 7, is characterized in that the thickness of described insulating barrier is 0.6 ~ 1.0mm, the thickness of the first water blocking layer is 0.2 ~ 0.6mm, the thickness of sheath is 0.6 ~ 1.2mm, the thickness of oversheath is 1.6 ~ 2.5mm.
9. three-core structure water resistant tree twisted polyethylene cable, it is characterized in that it includes the water resistant tree twisted polyethylene cable described in three claims 1 to claim 8 any one, three water resistants tree twisted polyethylene cables, in tangent placement between two, have position fixed bed outside three water resistant tree twisted polyethylene cables, extrusion molding are coated with the 3rd water blocking layer to position fixed bed, the 3rd water blocking layer is coated with the sheath that blocks water outward.
10. three-core structure water resistant according to claim 9 tree twisted polyethylene cable, is characterized in that the material of described position fixed bed is polyester belt or nonwoven fabrics or waterstop; The material of described 3rd water blocking layer is aluminium strip or steel band or copper strips; The material of sheath of blocking water is high density polyethylene (HDPE) or crosslinked polyethylene or polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520390246.4U CN204632417U (en) | 2015-06-09 | 2015-06-09 | Water resistant tree twisted polyethylene cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520390246.4U CN204632417U (en) | 2015-06-09 | 2015-06-09 | Water resistant tree twisted polyethylene cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204632417U true CN204632417U (en) | 2015-09-09 |
Family
ID=54051419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520390246.4U Active CN204632417U (en) | 2015-06-09 | 2015-06-09 | Water resistant tree twisted polyethylene cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204632417U (en) |
-
2015
- 2015-06-09 CN CN201520390246.4U patent/CN204632417U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang town southeast of Changshu Development Zone, No. 8 Chang kunlu Patentee after: Jiangsu Zhongli group Limited by Share Ltd Address before: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang town southeast of Changshu Development Zone, No. 8 Chang kunlu Patentee before: Zhongli Science & Technology Group Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |