CN205230618U - Flexible water -resistant tree aluminum alloy cable of middling pressure - Google Patents
Flexible water -resistant tree aluminum alloy cable of middling pressure Download PDFInfo
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- CN205230618U CN205230618U CN201520990124.9U CN201520990124U CN205230618U CN 205230618 U CN205230618 U CN 205230618U CN 201520990124 U CN201520990124 U CN 201520990124U CN 205230618 U CN205230618 U CN 205230618U
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Abstract
The utility model discloses a flexible water -resistant tree aluminum alloy cable of middling pressure, the cable is including the cable core, waterproof layer, non - metal armor layer and the oversheath that set gradually from inside to outside, the cable core includes an insulation core perhaps the cable core by three insulation core strandings around the package form and fill the packing that blocks water between three insulation core, wherein, insulation core include aluminum alloy conductor and from inside to outside in proper order the cladding be in last conductor shield, water -resistant tree insulating layer, insulation screen and the iron shielded layer of aluminum alloy conductor. Compared with the prior art, the utility model discloses a flexible water -resistant tree aluminum alloy cable of middling pressure has waterproof tree excellent performance, light in weight, characteristics such as the external diameter is little, bend radius is little, anti side pressure excellent performance, has improved the life of XLPE cable greatly.
Description
Technical field
The utility model relates to the technical field of power cable processing and manufacturing, more particularly, relates in one and presses flexible water resistant to set aluminium alloy cable.
Background technology
Crosslinked polyethylene (XLPE) cable has the series of advantages such as good electric property, mechanical strength is good, structure is simply lightweight, is widely used in 500kV and following network system.Generally, XLPE cable heat oxygen aging resistance, useful life can reach 30-60, but XLPE cable also faces water-treeing problem, particularly under humidity even immersion condition, be easy to form water tree inside insulating barrier, and then cause electric branch and partial discharge, serious useful life of reducing cable.
China is from the end of the eighties in last century, in Tianjin, Jiangsu, the coastal developed regions first large-scale application XLPE cable such as Guangzhou, after operation more than ten years and from 2005, find that XLPE cable punctures inefficacy successively, find through dissecting: in the XLPE insulation of whole cable, water tree appears in many places, cannot repair, can only whole scrap replacing.From then on the water tree problem of XLPE cable causes the great attention of power supply administration, scientific research institutions and cables manufacturing enterprise gradually.
For the supply and distribution network of city, put cable underground and replace built on stilts laying to be irreplaceable trend, because underground laying pipeline scarcity of resources, XLPE power cable is often laid in drainage pipeline, be in the environment of serious moist even long-term immersion for a long time, therefore the following demand to waterproof tree XLPE cable can be increasing, wide market.
Utility model content
In order to solve problems of the prior art, it can the excellent and rated voltage of longer service life be the flexible water resistant tree aluminium alloy cable of 18/30kV that the purpose of this utility model is to provide a kind of water treeing resistance.
The utility model provides in one presses flexible water resistant to set aluminium alloy cable, described cable comprises the cable core, watertight composition, non-metallic armoring layer and the oversheath that set gradually from inside to outside, described cable core comprises an insulated wire cores or described cable core and forms by three insulated wire cores strandings are wrapped and are filled with the packing that blocks water between described three insulated wire cores, wherein, described insulated wire cores comprises aluminium alloy conductor and is coated on conductor shield on described aluminium alloy conductor, water resistant tree insulating barrier, insulation screen and metal screen layer from inside to outside successively.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described aluminium alloy conductor is formed by the trapezoidal aluminium alloy conductor of multiply system of twisting.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described conductor shield is extruded by cross-linking type semiconductive polyethylene and forms.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described water resistant tree insulating barrier forms by pressing crosslinked polyethylene to extrude in water-fast tree.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described insulation screen is extruded by cross-linking type semi-conductive screen polyethylene and forms.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described conductor shield, water resistant tree insulating barrier and insulation screen are extruded on described aluminium alloy conductor by three-layer co-extruded.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described metal screen layer forms by copper strips is overlapping wrapped.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described watertight composition is formed by aluminum-plastic composite membrane longitudinal lapping.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described non-metallic armoring layer is extruded by foamed polymer material and forms.
According to an embodiment of middle pressure of the present utility model flexible water resistant tree aluminium alloy cable, described oversheath is extruded by medium density polyethylene and forms.
Compared with prior art, middle pressure of the present utility model flexible water resistant tree aluminium alloy cable has the features such as water treeing resistance energy is excellent, lightweight, external diameter is little, bending radius is little, lateral pressure resistant function admirable, substantially increases the useful life of XLPE cable.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of pressing flexible water resistant to set aluminium alloy cable in the utility model exemplary embodiment.
Description of reference numerals:
1-aluminium alloy conductor, 2-conductor shield, 3-water resistant tree insulating barrier, 4-insulation screen, 5-metal screen layer, 6-cable core, 7-watertight composition, 8-non-metallic armoring layer, 9-oversheath, 10-block water packing.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Be described in detail to the structure and principle of pressing flexible water resistant tree aluminium alloy cable in the utility model below.
Fig. 1 is according to the structural representation of pressing flexible water resistant to set aluminium alloy cable in the utility model exemplary embodiment.
As shown in Figure 1, according to exemplary embodiment of the present utility model, described middle pressure flexible water resistant tree aluminium alloy cable comprises the cable core 6, watertight composition 7, non-metallic armoring layer 8 and the oversheath 9 that set gradually from inside to outside.Wherein, cable core 6 can comprise an insulated wire cores, also can comprise three insulated wire cores, specifically can arrange according to core size.According to exemplary embodiment of the present utility model, cable core 6 forms by three insulated wire cores strandings are wrapped and are filled with the packing 10 that blocks water between three insulated wire cores.
Wherein, watertight composition 7 is formed by aluminum-plastic composite membrane longitudinal lapping, and directly wrapped outside cable core 6.Preferably, select double-sided aluminum plastic composite membrane to carry out vertical bag to cable core 6, and adopt the overseam of heat gun to vertical bag to add thermofussion welding, make it form airtight watertight composition, thus stop moisture radially to permeate, have that structure is simple, lightweight, the advantage of enclosed moisture-resistant.
Non-metallic armoring layer 8 is extruded by foamed polymer material and forms, and is directly extruded in outside watertight composition 7.Polymeric material have ageing-resistant, mechanical strength is high, good electric property, the advantage such as waterproof, and the polymeric material adding blowing agent is meeting in above-mentioned advantage situation, and after also having weight saving, vibration resistance, pressurized, deformation such as to recover automatically at the feature.Compared with bimetallic armour conventional at present, non-metallic armoring layer has a series of outstanding advantages such as lightweight, corrosion-resistant, nonmagnetic loss, soft pliable song, airtight waterproof, mechanical resistant vibration, anti-compressive deformation.
Oversheath 9 is extruded by medium density polyethylene and forms, and is directly extruded in outside non-metallic armoring layer 8.Compared with conventional pvc sheath, it has the features such as good mechanical performance, waterproof, wear-resisting, excellent electrical properties.
According to the utility model, described insulated wire cores comprises aluminium alloy conductor 1 and is coated on conductor shield 2 on aluminium alloy conductor 1, water resistant tree insulating barrier 3, insulation screen 4 and metal screen layer 5 from inside to outside successively.
Wherein, aluminium alloy conductor 1 is formed by the trapezoidal aluminium alloy conductor of multiply system of twisting.Compared with conventional copper conductor or aluminium conductor, it has lightweight, creep resistant, the advantage such as corrosion-resistant; And compared with compact conductor structure, single line deformation rate is little, roundness good, conductor filled coefficient is high, conductor diameter is little feature that it has.
Conductor shield 2 is extruded by cross-linking type semiconductive polyethylene and forms.Aluminium alloy conductor 1 equipotential of itself and conductively-closed also sets insulating barrier 3 good contact with water resistant, thus avoids setting between insulating barrier 3 at aluminium alloy conductor 1 and water resistant partial discharge occurs.Further, arrange conductor shield 2 not only can by cable electric current produce electromagnetic-field-shielded in cable, certain ground protection effect can also be played, play the effect of safeguard protection.
Water resistant tree insulating barrier 3 forms by pressing crosslinked polyethylene to extrude in water-fast tree.It not only makes the live part of cable and external environment insulate, and also plays protection cable not by the extraneous effect damaged simultaneously, more serves the effect that water resistant tree produces, effectively prevent the generation of water tree.
Insulation screen 4 is extruded by cross-linking type semi-conductive screen polyethylene and forms.Insulation screen 4 can improve the Electric Field Distribution of cable, plays the effect of protection insulated wire cores on the one hand, and it and water resistant are set insulating barrier 3 good contact and form equipotential at insulating surface on the other hand, effectively can avoid partial discharge.
Preferably, make conductor shield 2, water resistant tree insulating barrier 3 and insulation screen 4 be extruded on aluminium alloy conductor 1 by three-layer co-extruded, one-shot forming also realizes continuously crosslinked.
Metal screen layer 5 forms by copper strips is overlapping wrapped, can not only realize electric field shielding, and make to have good electrical contact between different insulative core.
Further, middle pressure of the present utility model flexible water resistant tree aluminium alloy cable is preferably applicable to the ac rated voltage of 18/30kV.
In sum, middle pressure of the present utility model flexible water resistant tree aluminium alloy cable has following beneficial effect:
1) conductor adopts aluminium alloy conductor, compared with conventional copper conductor or aluminium conductor, has lightweight, creep resistant, the advantage such as corrosion-resistant; Conductor adopts multiply trapezoidal aluminium alloy conductor strand system to form, and compared with compact conductor structure, has the advantages that single line deformation rate is little, roundness good, activity coefficient is high, external diameter is little;
2) watertight composition is indulged bag by double-sided aluminum plastic composite membrane and is welded, and forms airtight watertight composition, stops moisture radially to permeate, and has that structure is simple, lightweight, the advantage of enclosed moisture-resistant;
3) armour employing foamed polymer material extrudes and forms, and compared with metal armor layers, has a series of outstanding advantages such as lightweight, corrosion-resistant, nonmagnetic loss, soft pliable song, airtight waterproof, mechanical resistant vibration, anti-compressive deformation;
4) oversheath is extruded by medium density polyethylene and forms, and compared with conventional pvc sheath, has the features such as good mechanical performance, waterproof, wear-resisting, excellent electrical properties.
5) there is the features such as water treeing resistance energy is excellent, lightweight, external diameter is little, bending radius is little, lateral pressure resistant function admirable.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (10)
1. press in one kind flexible water resistant to set aluminium alloy cable, it is characterized in that, described cable comprises the cable core, watertight composition, non-metallic armoring layer and the oversheath that set gradually from inside to outside, described cable core comprises an insulated wire cores or described cable core and forms by three insulated wire cores strandings are wrapped and are filled with the packing that blocks water between described three insulated wire cores, wherein, described insulated wire cores comprises aluminium alloy conductor and is coated on conductor shield on described aluminium alloy conductor, water resistant tree insulating barrier, insulation screen and metal screen layer from inside to outside successively.
2. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, is characterized in that, described aluminium alloy conductor is formed by the trapezoidal aluminium alloy conductor of multiply system of twisting.
3. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, it is characterized in that, described conductor shield is extruded by cross-linking type semiconductive polyethylene and forms.
4. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, is characterized in that, described water resistant tree insulating barrier forms by pressing crosslinked polyethylene to extrude in water-fast tree.
5. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, it is characterized in that, described insulation screen is extruded by cross-linking type semi-conductive screen polyethylene and forms.
6. middle pressure according to any one of claim 1 to 5 flexible water resistant tree aluminium alloy cable, is characterized in that, described conductor shield, water resistant tree insulating barrier and insulation screen are extruded on described aluminium alloy conductor by three-layer co-extruded.
7. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, is characterized in that, described metal screen layer forms by copper strips is overlapping wrapped.
8. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, it is characterized in that, described watertight composition is formed by aluminum-plastic composite membrane longitudinal lapping.
9. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, it is characterized in that, described non-metallic armoring layer is extruded by foamed polymer material and forms.
10. middle pressure according to claim 1 flexible water resistant tree aluminium alloy cable, it is characterized in that, described oversheath is extruded by medium density polyethylene and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520990124.9U CN205230618U (en) | 2015-12-03 | 2015-12-03 | Flexible water -resistant tree aluminum alloy cable of middling pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520990124.9U CN205230618U (en) | 2015-12-03 | 2015-12-03 | Flexible water -resistant tree aluminum alloy cable of middling pressure |
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| CN205230618U true CN205230618U (en) | 2016-05-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107195369A (en) * | 2017-06-12 | 2017-09-22 | 上海金友金弘智能电气股份有限公司 | A kind of water surface photovoltaic power station cable |
| CN107301900A (en) * | 2017-06-22 | 2017-10-27 | 重庆鸽牌电线电缆有限公司 | 35KV multilayer flashing cables |
| CN113793723A (en) * | 2021-09-06 | 2021-12-14 | 海盐爱德森特种线缆有限公司 | Pressure-bearing electric shock-proof cable |
-
2015
- 2015-12-03 CN CN201520990124.9U patent/CN205230618U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107195369A (en) * | 2017-06-12 | 2017-09-22 | 上海金友金弘智能电气股份有限公司 | A kind of water surface photovoltaic power station cable |
| CN107301900A (en) * | 2017-06-22 | 2017-10-27 | 重庆鸽牌电线电缆有限公司 | 35KV multilayer flashing cables |
| CN113793723A (en) * | 2021-09-06 | 2021-12-14 | 海盐爱德森特种线缆有限公司 | Pressure-bearing electric shock-proof cable |
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Address after: 614001 18 Yingbin Avenue, hi tech Zone, Leshan, Sichuan Patentee after: Shang Wei Limited by Share Ltd Address before: 614001 18 Yingbin Avenue, hi tech Zone, Leshan, Sichuan Patentee before: Sichuan Mingxing Cable Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |