CN103106980A

CN103106980A - High-strength power cable

Info

Publication number: CN103106980A
Application number: CN2013100542068A
Authority: CN
Inventors: 张卫忠
Original assignee: Wuxi Shuguang Cable Co Ltd
Current assignee: Wuxi Shuguang Cable Co Ltd
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2013-05-15

Abstract

The invention discloses a high-strength power cable. The high-strength power cable comprises cable cores, and each cable core is formed by stranding of three insulated wire cores. Filler is arranged in gaps of the cable cores, a wrapping tape layer is wrapped outside the cable cores, an isolating layer and an armor layer are sequentially wrapped outside the wrapping tape layer in an extruded mode, and an outer protective jacket is wrapped on the outermost layer of the cable in an extruded mode. Each insulated wire core is composed of a conductor, an inner shielding layer, an insulating layer, an outer shielding layer and a metal shielding layer, wherein the inner shielding layer, the insulating layer, the outer shielding layer and the metal shielding layer are sequentially wrapped outside the conductor in an extruded mode. The high-strength power cable has the advantages of being good in conductivity, high in mechanical performance, creeping and aging resistant, high temperature resistant, good in corrosion resistant performance, long in service life, and the like, and is suitable for voltage classes of 0.6KV-35KV and dry or humid sites with temperature of 200 DEG C, 180 DEG C, 105 DEG C and 90 DEG C or below; and the high-strength power cable can be installed indoors or outdoors, also can be installed in a vertical mode or in a supported mode or in a laid mode along a wall, and even can be installed underground in a directly buried mode.

Description

A kind of high strength power cable

Technical field

The present invention relates to the electric wire field, specifically refer to a kind of high strength power cable.

Background technology

2004 so far, and the aluminium of annual 10% left and right of China needs outlet, and production capacity is seriously superfluous, and meanwhile, National Development and Reform Commission's statistics: 2004 to 2006, the breach of the annual copper material of China was over 1,300,000 tons; According to the data of China Statistical Yearbook in 2008,4,520,000 tons of China's copper mine in 2007 and smart copper imports, copper and goods import volume thereof are 27,100,000,000 dollars.China's copper metal market is serious dependence on import, and the inexhaustible demand of China to copper material causes the World Copper valency constantly to raise up, Chinese Enterprise is also gone abroad with unprecedented enthusiasm, merges external ore deposit and looks forward to, and exploits external mine, the cost of paying, that goes through is sad, and compatriots come clearly into view.From 2004 year-to-date, the copper valency has gone up over 200%u, and the copper valency is inviolent for the fluctuation of aluminium valency.The serious dependence of change to copper material becomes international supply and demand relation for a change, saves foreign exchange, takes full advantage of Domestic Resources, guarantees the key of power industry sustainable development.Development along with urban modernization, the demand of power consumption increases year by year, the demand of power cable is at increase year after year, its copper, aluminium demand are also in continuous expansion, China is that copper ore resource is deficient, the country that bauxite resource is very abundant, performance and the copper of aluminium differ greatly, and the research and development alloy aluminum applies to has unique substitution of resources advantage in power cable.

And the shortcoming of existing fine aluminium conductor power cable is mainly reflected in following several aspect: (1) bad mechanical strength easily fractures; (2) easily creep needs frequent holding screw; (3), there is potential safety hazard in easily overload heating; (4) fine aluminium cable terminal used is without special processing, may produce electrochemical corrosion with the junction of copper bar.

Summary of the invention

Technical problem to be solved by this invention is to provide and a kind ofly conducts electricity very well, mechanical performance is high, creep resistant is aging, the high strength power cable of high temperature resistant, long service life.

A kind of high strength power cable of the present invention comprises cable core, and its cable core thoroughly does away with stranded the forming of edge core by three; Gap at cable core is provided with inserts, and the outer wrapped belting layer of cable core extrudes separator, armour successively outside belting layer, and the cable outermost layer extrudes oversheath; Described insulated wire cores consists of by aluminium alloy conductor and extruding successively internal shield outside aluminium alloy conductor, insulating barrier, outer shielding layer, metal screen layer.

Further improve, described armour adopts the metal linkage sheathed structure.

Further improve, described insulating barrier adopts the flame-retardant organosilane cross-linked poly-ethylene material again; Described oversheath adopts low cigarette, Halogen, flame-proof environmental protection material.

Beneficial effect of the present invention:

1, the good electric conductivity that has of aluminium alloy conductor and excellent mechanical performance, the connection that has improved aluminium conductor is unreliable, bad mechanical strength, the easy shortcoming such as creep, close with copper conductor on mechanical performance, electric property amasss by increasing section and copper conductor has same conductive capability, will be widely used in low-voltage distribution system;

2, the flame-retardant organosilane cross-linked poly-ethylene material is adopted in insulation, has the characteristics such as low temperature resistant, high temperature resistant, anti-burning, anti-aging, low-carbon environment-friendly;

3, oversheath adopts the PVC of lead-free and cadmium-free, also can select the materials such as low smoke and zero halogen, fire-retardant, refractory material, fluoroplastics, silicon rubber, fourth silicon or butyronitrile.Adapt to moist place and install, but also lay in the form such as direct-burried or carriage;

4, armour is nonmagnetic substance, can not produce eddy current, and is lighter than steel-tape armouring, more easily peel off, and it is convenient to install, and can exempt from crane span structure and install, and reduces costs; Be not limited to 360 degree and install, do not need terminal box; Flexible, reduce the requirement to pipeline, through well-designed, can effectively avoid the wire damage in installation process.

5, Corrosion Protection is superior; Form immediately fine and close oxide layer when rare earth aluminum alloy conductor surface contact with air, this oxide layer tolerates various forms of corrosion especially.Corrosion resistance at the environment middle rare earth aluminium alloy of seawater air salt fog and sulfur-bearing is better than copper greatly; The characteristics that rare earth aluminium alloy can bear adverse circumstances make its conductor that is widely used in the pallet inner cable, and many industrial elements and container.6, be 40-50 useful life of the present invention.　

Description of drawings

Fig. 1 is structural representation of the present invention.

Embodiment

As shown in Figure 1, a kind of high strength power cable of the present invention comprises cable core, and its cable core thoroughly does away with stranded the forming of edge core by three; Be provided with inserts 6 in the gap of cable core, the outer wrapped belting layer 7 of cable core extrudes separator 8, armour 9 successively outside belting layer 7, and the cable outermost layer extrudes the oversheath 10 that adopts low cigarette, Halogen, flame-proof environmental protection material; Described insulated wire cores is by aluminium alloy conductor 1 and be extruded in successively the outer internal shield 2 of aluminium alloy conductor 1, the insulating barrier 3 of flame-retardant organosilane cross-linked poly-ethylene material, outer shielding layer 4, metal screen layer 5 and consist of.

Industrial effect of the present invention is:

by add iron in fine aluminium, the elements such as rare earth, and through special PROCESS FOR TREATMENT, make conductor have electric property and mechanical performance preferably, the flame-retardant organosilane cross-linked poly-ethylene material is adopted in insulation, armour adopts special metal linkage sheathed structure, sheath adopts special low cigarette, Halogen, the flame-proof environmental protection material, the ballistic properties of this cable is than copper cable low 40%, pliability is higher by 30% than copper cable, guaranteed on the whole the stability that cable connects, sheathed structure is isolated from the outside cable simultaneously, even when fire, protective effect due to outer sheathed structure, greatly reduce the danger coefficient that catches fire.

The invention provides a kind of thinking and implementation method of high strength power cable; concrete application approach is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.

Claims

1. a high strength power cable, is characterized in that, comprises cable core, and its cable core is by stranded the forming of some eradication edge cores; Be provided with inserts (6) in the gap of cable core, the outer wrapped belting layer (7) of cable core extrudes separator (8), armour (9) successively outside belting layer (7), and the cable outermost layer extrudes oversheath (10); Described insulated wire cores is by aluminium alloy conductor (1) and be extruded in successively the outer internal shield of aluminium alloy conductor (1) (2), insulating barrier (3), outer shielding layer (4), metal screen layer (5) formation.

2. high strength power cable according to claim 1, is characterized in that, described insulated wire cores is three.

3. high strength power cable according to claim 1, is characterized in that, described armour (9) adopts the metal linkage sheathed structure.

4. high strength power cable according to claim 1, is characterized in that, described insulating barrier (3) adopts the flame-retardant organosilane cross-linked poly-ethylene material.

5. high strength power cable according to claim 1, is characterized in that, described oversheath (10) adopts low cigarette, Halogen, flame-proof environmental protection material.