CN203931626U - In a kind of water proof type, press aluminium alloy power cable - Google Patents
- ️Wed Nov 05 2014
CN203931626U - In a kind of water proof type, press aluminium alloy power cable - Google Patents
In a kind of water proof type, press aluminium alloy power cable Download PDFInfo
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Publication number
- CN203931626U CN203931626U CN201420254069.2U CN201420254069U CN203931626U CN 203931626 U CN203931626 U CN 203931626U CN 201420254069 U CN201420254069 U CN 201420254069U CN 203931626 U CN203931626 U CN 203931626U Authority
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Abstract
The utility model discloses in a kind of water proof type and press aluminium alloy power cable, comprise many conductors, many conductors are provided with interior semi-conducting water-resistant tape layer outward respectively, interior semi-conducting water-resistant tape layer is provided with conductor shield outward from inside to outside, crosslinked polyetylene insulated layer, the three-layer co-extruded formation insulation shielding of insulation screen core, insulation shielding core is coated with middle semi-conducting water-resistant tape layer outward successively, metal screen layer, the mutual stranded bunchy of many eradications edge shielding core of clad metal screen forms cable core, cable core is coated with outer semi-conducting water-resistant tape layer, between outer semi-conducting water-resistant tape layer and cable core, be provided with water blocking yarn packed layer, outer semi-conducting water-resistant tape layer is coated with polyethylene separation sleeve outward successively, aluminum alloy strip lock armo layer, outer protective polyethylene jacket layer.The utlity model has waterproof, protection against the tide, lightweight, price is low, bending radius is little, long service life, the advantage such as easy for installation.
Description
In a kind of water proof type, press aluminium alloy power cable
technical field
The utility model relates to technical field of electric wires and cables, relates in particular in a kind of water proof type and presses aluminium alloy power cable.
background technology
Power cable with cross-linked polyethylene insulation, because it has good mechanical performance and electric property, is widely used in electric power system.But find in the running of many decades, cable internal wetted or immersion (three core medium-pressure power cables, because core gap is large, moisture or moisture more easily infiltrate) after, conductor meeting premature oxidation, electric, insulation property can decline to a great extent, and particularly easy initiation can have a strong impact on the water tree of cable useful life and reliability.The generation of water tree will cause insulation dielectric loss to increase, and reduces insulation resistance and breakdown voltage simultaneously, accelerates aging speed, shortens cable useful life.Most serious of all, water tree is oxidized, transforms under electric field action or for a long time, finally can be at the most advanced and sophisticated generation of water tree electric branch.And there is the partial discharge of continuous anti-tensile in electric branch cavity, can cause cable insulation breakdown in a short time, have a strong impact on the dependability of cable.But conventional power cable does not possess the performance of waterproof, protection against the tide at present.
At present in electric power system, still having part medium-pressure power cable conductor is fine aluminium core, but because himself bad mechanical property and creep resistance are poor, market is restricted.And copper core medium-pressure power cable has weight large, bounce-back property is high, the shortcomings such as mounting and installation difficulty, natural resources shortage (price is high).The material that in conventional electric power cable, metal tape armour layer adopts is stainless steel band or galvanized steel strip, but its be easily corroded or useful life limited, affect machine security and the electrical safety of cable.
To sum up stating these problems mainly contains:
1, be laid in for a long time humidity or be immersed under the environment of water of cable, moisture or moisture can along cable longitudinally and radial clearance invade cable, under working voltage, more easily initiation has a strong impact on water tree and the electric branch of cable useful life and reliability.
2, fine aluminium core power cable mechanical performance and creep resistance are poor, and joint connective stability is poor.
3, copper core medium-pressure power cable Heavy Weight, price is high, and bending radius is large, and bounce-back property is large, installation difficulty is large.
4, the steel-tape armouring layer in conventional electric power cable, perishable and useful life is limited, affects machine security and the electrical safety of cable.
utility model content
In order to make up prior art problem, the purpose of this utility model is to provide in a kind of water proof type and presses aluminium alloy power cable, in rated voltage 6 ~ 35kV electric power system, can be used for transmission system and distribution system, make the carrier of electric power, be widely used in the fields such as electric power, building, industrial and mineral, metallurgy, oil, chemical industry, traffic, be specially adapted to for a long time in moist or have in the environment of water.
The technical solution of the utility model is as follows:
In water proof type, press aluminium alloy power cable, comprise many conductors, it is characterized in that: many described conductors are provided with interior semi-conducting water-resistant tape layer outward respectively, interior semi-conducting water-resistant tape layer is provided with conductor shield outward from inside to outside, crosslinked polyetylene insulated layer, the three-layer co-extruded formation insulation shielding of insulation screen core, insulation shielding core is coated with middle semi-conducting water-resistant tape layer outward successively, metal screen layer, the mutual stranded bunchy of many eradications edge shielding core of clad metal screen forms cable core, cable core is coated with outer semi-conducting water-resistant tape layer, between outer semi-conducting water-resistant tape layer and cable core, be provided with water blocking yarn packed layer, outer semi-conducting water-resistant tape layer is coated with polyethylene separation sleeve outward successively, aluminum alloy strip lock armo layer, outer protective polyethylene jacket layer.
In described water proof type, press aluminium alloy power cable, it is characterized in that: described conductor adopts AA8030 serial rare-earth high-iron aluminum alloy conductor, adds water-proofing powder, through layering impacted process, is twisted into water proof type conductor.
The utility model has the advantages that:
1, the utility model conductor is rare earth high-iron aluminium alloy compact conductor, make cable there is the excellent properties such as mechanical performance is high, lightweight, creep-resistant property strong, bounce-back property is low, effectively solved copper core cable Heavy Weight, bounce-back property is large, the creep-resistant property of aluminium cable is poor, difficult problem is installed.
2, the utility model from longitudinally, radially two kinds of waterproof constructions design, and have reached omnibearing waterproof, moisture effect.Effectively solve the water tree and the electric branch that because of cable, make moist or soak and cause, improved useful life and the reliability of cable.
3, the utility model metal armouring material adopts aluminum alloy strip, utilizes the advanced technologies of chain armouring.Not only can improve the loss of the machine security of traditional cable and electrical safety performance, minimizing circuit, but also can play certain blocking water and flame retardant effect.
4, Cable Bending Radius of the present utility model is little, efficiently solves the problem because of the installation difficulty that construction space is little, bending radius causes greatly.
5, the utility model price is low, and the price of aluminium alloy cable only has copper cable 75% left and right, and installation cost can also reduce 20%--50%.
accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
embodiment
Referring to accompanying drawing:
In water proof type, press aluminium alloy power cable, comprise many conductors 1, outside many conductors 1, be provided with respectively interior semi-conducting water-resistant tape layer 2, the outer conductor shield 3 that is provided with from inside to outside of interior semi-conducting water-resistant tape layer 2, crosslinked polyetylene insulated layer 4, the three-layer co-extruded formation insulation shielding of insulation screen 5 core, insulation shielding core is coated with middle semi-conducting water-resistant tape layer 6 outward successively, metal screen layer 7, the mutual stranded bunchy of many eradications edge shielding core of clad metal screen 7 forms cable core, cable core is coated with outer semi-conducting water-resistant tape layer 8, between outer semi-conducting water-resistant tape layer 8 and cable core, be provided with water blocking yarn packed layer 9, the outer polyethylene separation sleeve 10 that is coated with successively of outer semi-conducting water-resistant tape layer 8, aluminum alloy strip lock armo layer 11, outer protective polyethylene jacket layer 12.
Conductor 1 adopts AA8030 serial rare-earth high-iron aluminum alloy conductor, adds water-proofing powder, through layering impacted process, is twisted into water proof type conductor.
The problem that the selection of the utility model material, structural design and concrete enforcement solve is as follows:
One, the solution of waterproof, moistureproof problem:
(1) longitudinally waterproof, protection against the tide: 1., in the stranded process of aluminium alloy conductor, utilize Electrostatic Spray Technology that water-proofing powder is attached between conductor single line preferably, the outer wrapped semiconductive waterstop of conductor.2. the gap of insulated wire cores stranding adopts water blocking yarn to fill, the outer wrapped semiconductive waterstop of cable core.
(2) radially waterproof, protection against the tide: 1. conductor is outer, insulation shielding is outer, the outer wrapped semiconductive waterstop of cable core.2. cable core band extrudes layer of polyethylene (having excellent water resistance) separation sleeve outward, the outer lock armo aluminum alloy strip of separation sleeve, and armour extrudes outer protective polyethylene cover outward.Above from longitudinally, radially two kinds of structures have reached omnibearing waterproof, humidity resistance.Effectively solve the water tree and the electric branch that because of cable, make moist or soak and cause, improved useful life and the reliability of cable.
Two, the utility model conductor adopts rare earth high-iron aluminum alloy conductor, and the AA8030 series alloys material of take is conductor, adopts special layering impacted process, annealing in process and Electrostatic Spray Technology, is twisted into the compact conductor of water proof type.This conductor is lightweight (to be met under the prerequisite of equal electric property, the weight of aluminium alloy cable is half of copper core cable), creep-resistant property is strong (with respect to fine aluminium, creep-resistant property improves 300%), low (aluminium alloy cable angle of rebound is copper cable to bounce-back property 60%, and without memory) etc., effectively solved copper core cable Heavy Weight, bounce-back property is large, the creep-resistant property of aluminium cable is poor, difficult problem is installed.
Three, metal armouring material adopts aluminum alloy strip, and utilizes the advanced technologies of chain armouring, and armour is self-locking form, and mechanical strength is high, should not corrode, and has effectively improved machine security and the electrical safety performance of traditional cable; Aluminum alloy strip is nonmagnetic substance, even if there is three-phase imbalance electric current, also can not produce eddy current, can reduce the loss of circuit.Once and run into fire, can make inner insulated wire cores and outside burning things which may cause a fire disaster well isolate, play certain flame retardant effect.In addition, because armour is self-locking form, sealing is better, has certain radial water-resisting performance.
Four, because cable conductor has adopted the good aluminum alloy materials of pliability, not only in BENDING PROCESS, do not crack, and Cable Bending Radius is little, is generally 7 times of the outside diameter of cable, and the 10-20 that the bending radius of general power cable is cable doubly.Efficiently solve the problem because of the installation difficulty that construction space is little, conventional electric power Cable Bending Radius causes greatly.
Claims (2)
1. in a water proof type, press aluminium alloy power cable, comprise many conductors, it is characterized in that: many described conductors are provided with interior semi-conducting water-resistant tape layer outward respectively, interior semi-conducting water-resistant tape layer is provided with conductor shield outward from inside to outside, crosslinked polyetylene insulated layer, the three-layer co-extruded formation insulation shielding of insulation screen core, insulation shielding core is coated with middle semi-conducting water-resistant tape layer outward successively, metal screen layer, the mutual stranded bunchy of many eradications edge shielding core of clad metal screen forms cable core, cable core is coated with outer semi-conducting water-resistant tape layer, between outer semi-conducting water-resistant tape layer and cable core, be provided with water blocking yarn packed layer, outer semi-conducting water-resistant tape layer is coated with polyethylene separation sleeve outward successively, aluminum alloy strip lock armo layer, outer protective polyethylene jacket layer.
2. in water proof type according to claim 1, press aluminium alloy power cable, it is characterized in that: described conductor adopts AA8030 serial rare-earth high-iron aluminum alloy conductor, adds water-proofing powder, through layering impacted process, is twisted into water proof type conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420254069.2U CN203931626U (en) | 2014-05-15 | 2014-05-15 | In a kind of water proof type, press aluminium alloy power cable |
Applications Claiming Priority (1)
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| CN201420254069.2U CN203931626U (en) | 2014-05-15 | 2014-05-15 | In a kind of water proof type, press aluminium alloy power cable |
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| CN203931626U true CN203931626U (en) | 2014-11-05 |
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| CN201420254069.2U Expired - Fee Related CN203931626U (en) | 2014-05-15 | 2014-05-15 | In a kind of water proof type, press aluminium alloy power cable |
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| 2014-11-05 | C14 | Grant of patent or utility model | |
| 2014-11-05 | GR01 | Patent grant | |
| 2014-12-31 | C53 | Correction of patent of invention or patent application | |
| 2014-12-31 | CB03 | Change of inventor or designer information |
Inventor after: Wang Xiaobao Inventor before: Wei Shanheng |
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