CN205692607U - Full stop water electric wire - Google Patents

Abstract

The utility model discloses a kind of full stop water electric wire, including cable core, this cable core includes the some insulation core wires that block water, this insulation core wire that blocks water includes conductor, it is coated with silicone oil on the conductor and forms interior silicon layer, at interior silicon layer extruded insulation layer, it is coated with silicone oil on which insulating layer and forms outer silicon layer；The described insulation core wire that blocks water is stranded in waterproofing rope, is filled with, in the gap of insulation core wire that blocks water, the implant that blocks water；Described cable core is coated with the belting layer that blocks water, is extruded with inner sheath on belting layer blocking water, inner sheath is closely wound with armor, armor is extruded with oversheath.Described interior silicon layer is coated by polymethylphenyl siloxane fluid and is formed.Described outer silicon layer is coated by modified silicon oil and is formed.This full stop water electric wire has two-way water-resistant longitudinally and radially and the strong advantage of water-resisting ability, is widely used in having in the electric wire of high water resistant performance requirement.

Description

Full stop water electric wire

Technical field

This utility model relates to a kind of power cable, particularly relates to one and has longitudinal direction, radially Comprehensive Preventing tide-bound water function Electric wire.

Background technology

Along with the fast development of Chinese national economy, deepening continuously of capital construction, electricity needs continues to increase, and crosslinking is poly- Ethylene insulated power cable product consumption the most significantly increases.But twisted polyethylene cable especially medium and high voltage cable Its life-span is often determined by the degree of aging insulated, and insulation ag(e)ing degree is restricted by tree discharge, i.e. water tree and electricity tree Impact, in particular with the raising of electric pressure, cable block-water performance is more and more important.

Water tree is owing to moisture penetrates into crosslinked polyetylene insulated, the dendrimers formed under electric field action, the product of water tree Raw, it will to cause insulation dielectric loss to increase, reduce insulation resistance and breakdown voltage simultaneously, accelerate insulation ag(e)ing rate, Shorten cable service life.Particularly it is immersed in for a long time in water or when being in wet environment in running when cable, if There is no good stop water or measure, then cable is as easy as rolling off a log causes insulation to produce aging because of water tree, thus causes insulation Hydraulic performance decline, is greatly shortened the service life of cable.

Cable permeable blind ditch is commonly divided into two types: along cable conductor and cable core longitudinally infiltration, and along electricity Cable radially seeps water through sheath.The water-blocking moistureproof performance of existing power cable is not strong, its knot that blocks water from existing cable structural analysis Structure or employing longitudinal water-blocking structure, or use radial water-resisting structure, water is always entered by a longitudinally or radially approach Inside cable, and no matter use that structure, become unnecessary composition inside cable always water enters into and be trapped in cable In, become the basic condition that water tree is formed, especially when cable cover(ing) is by mechanical damage, more can aggravate interior water tree formation of insulating, Finally occur that cable insulation is breakdown, be greatly shortened the service life of cable, even cause electric operational accident.

Utility model content

For the above-mentioned deficiency existing for prior art, this utility model technical problem to be solved is to provide one to be had Two-way water-resistant longitudinally and radially and the strong full stop water electric wire of water-resisting ability.

In order to solve above-mentioned technical problem, full stop water electric wire of the present utility model, including cable core, this cable core bag Having included the some insulation core wires that block water, this insulation core wire that blocks water includes conductor, is coated with silicone oil on the conductor and forms interior silicon Oil reservoir, on interior silicon layer, extruded insulation layer, is coated with silicone oil on which insulating layer and forms outer silicon layer；The described insulation that blocks water Heart yearn is stranded in waterproofing rope, is filled with, in the gap of insulation core wire that blocks water, the implant that blocks water；Described cable core is coated with Block water belting layer, is extruded with inner sheath blocking water on belting layer, is closely wound with armor on inner sheath, squeezes on armor It is surrounded by oversheath.

After using said structure, the interior silicon layer formed owing to coating silicone oil on conductor, it is also coated with on the insulating layer Silicone oil and the outer silicon layer that formed, silicone oil not only has excellent electrical insulation properties and a hydrophobic humidity resistance, and ozone-resistant, The plurality of advantages such as Inverter fed motor, viscosity-temperature coefficient are little, surface tension is little, resistant to shearing, compression are big；Interior silicon layer on conductor enhances leads The electrical insulation properties of body, on insulating barrier, outer silicon layer can effectively stop water to immerse insulant, constitutes protection insulant Important defence line.Stranded in waterproofing rope due to the insulation core wire that blocks water again, it is filled with to block water in the gap of insulation core wire that blocks water and fills out Fill thing, cable conductor uses the implant that blocks water, not only increases the block-water performance of cable, and ensure that cable core structure rounding Stablizing of property and transmission performance；Especially when moisture is from cable socket or after entering from sheath defect, and waterproofing rope and blocking water is filled out Fill thing and not only can absorb moisture, and prevention moisture can be expanded rapidly after absorbing water and spread the most further along cable, thus real Existing cable longitudinally waterproof purpose.Due also to be coated with, on described cable core, the belting layer that blocks water, in blocking water and being extruded with on belting layer Sheath, is closely wound with armor on inner sheath, is extruded with oversheath on armor, is blocking water on insulation core wire to block water With the wrapped belting layer that blocks water, constitute multiple water-blocking moistureproof structure, the waterproof block-water effect that greatly strengthen, the most this tool Having in the composite construction of metal and interior oversheath, metal is completely impermeable, therefore uses metal armor layers to make cable have pole Strong radial water-resisting performance, armor both greatly strengthen the mechanical performances such as cable resistance to compression, had again good shield effectiveness；In Oversheath strengthens cable radial water-resisting performance further, effectively stops the radial direction of moisture to be penetrated into and diffusion.Therefore this structure can have Effect stops the radially and longitudinally diffusion of moisture, has extremely strong comprehensive waterproof water stop function, it is to avoid cable water tree and electricity are set Formed, thus be effectively protected cable, extend the service life of cable.

The further embodiment that this enforcement is novel, described interior silicon layer is coated by polymethylphenyl siloxane fluid and is formed.Outside described Silicon layer is coated by modified silicon oil and is formed.Silicon bi-layer oil reservoir can more efficiently stop moisture content to permeate to insulant.

This utility model further embodiment, described in the implant that blocks water be to be filled in the resistance blocked water in insulation core wire gap Pigment.Or the implant that blocks water described in, is to be filled in the water blocking yarn blocked water in insulation core wire gap.Can effectively stop moisture along electricity Cable diffusion the most further.

This utility model further embodiment, described in the belting layer that blocks water formed by semi-conducting water-resistant tape, this is partly led The electricity wrapped Duplication of waterstop is 20% 30%.Semiconductor waterstop had both had radial water-resisting function, to have certain shielding Effect.

Further embodiment of the present utility model, described inner sheath extrudes with cross-linking polyethylene materials and forms.Crosslinking is poly- Ethylene insulating sheath, not only has excellent electric property and mechanical and physical performance, and has portable construction, transmission capacity Greatly, mounting and installation and the convenient advantage of maintaining.

Further embodiment of the present utility model, described oversheath is extruded by high-density polyethylene material and forms.Highly dense Degree polythene material chemical resistance is good, and abrasion resistance properties is excellent, and tensile strength is good.

Further embodiment of the present utility model, described armor is formed by galvanized steel strip is wrapped.To increase cable Mechanical strength, improves erosion prevention, and its steel-tape armouring can bear mechanical pressure, and wire armoring can bear mechanical tensile forces.

Accompanying drawing explanation

Stop water electric wire complete to this utility model with detailed description of the invention is described further below in conjunction with the accompanying drawings.

Fig. 1 is the cross section structure schematic diagram of this utility model full stop water a kind of detailed description of the invention of electric wire.

In figure, 1 conductor, silicon layer in 2,3 insulating barriers, 4 outer silicon layers, 5 block water implant, 6 block water Rope, 7 block water belting layer, 8 inner sheaths, 9 armors, 10 oversheaths.

Detailed description of the invention

Full stop water electric wire as shown in Figure 1, the cable core of this cable includes five insulation core wires that block water, each The root insulation core wire that blocks water includes conductor 1, is coated with polymethylphenyl siloxane fluid and the interior silicon layer 2 that formed, at interior silicone oil on conductor 1 It is extruded with the insulating barrier 3 with crosslinked polyethylene as material on layer 2.It is coated with the most again MethylethoxylsiliconFluid Fluid etc. to change Property silicone oil forms outer silicon layer 4.Five insulation core wires that block water are stranded on the periphery of waterproofing rope 6 centered by waterproofing rope 6, in resistance Being filled with the implant 5 that blocks water in the gap of water insulation core wire, this implant 5 that blocks water is for water-proofing powder.

With semiconductive stopband around being bundled into the belting layer 7 that blocks water on the cable core of cable, the wrapped Duplication of this semiconductive stopband It is between 20% 30%, extrudes into inner sheath 8 with crosslinked polyethylene for material blocking water on belting layer 7.With plating on inner sheath 8 Zinc steel band is tightly wound to armor 9, extrudes with high-density polyethylene material and form oversheath 10 on this armor 9.

Above-mentioned only enumerate a kind of detailed description of the invention of the present utility model, but this utility model has been not limited thereto, On the premise of this utility model ultimate principle, it is also possible to number of improvements could be made and conversion, both can be single such as conductor Copper wire, it is also possible to be to be formed by some copper wire closing lay；Modified silicon oil is in addition to using MethylethoxylsiliconFluid Fluid, it is also possible to be first The modified silicon oils such as base hydroxy silicon oil, phenyl silicone oil；The implant that blocks water is except using in addition to water-proofing powder, it is also possible to be that water blocking yarn etc. blocks water material Material；Armor both can be galvanized steel strip sheathed structure, it is also possible to be zinc-coated wire sheathed structure.These conversion each fall within this reality With in novel protection domain.

Claims (10)

1. a full stop water electric wire, including cable core, this cable core includes the some insulation core wires that block water, and its feature exists In: described in the insulation core wire that blocks water include conductor (1), this conductor (1) is coated with silicone oil and the interior silicon layer (2) that formed, It is extruded with insulating barrier (3) on interior silicon layer (2), this insulating barrier (3) is coated with silicone oil and forms outer silicon layer (4)；Described The insulation core wire that blocks water is stranded in waterproofing rope (6), is filled with the implant that blocks water (5) in the gap of insulation core wire that blocks water；Institute State and on cable core, be coated with the belting layer that blocks water (7), the belting layer that blocks water (7) is extruded with inner sheath (8), tighten at inner sheath (8) Close it is wound with armor (9), armor (9) is extruded with oversheath (10).

Full stop water electric wire the most according to claim 1, it is characterised in that: described conductor (1) is by some copper wires Stranded forming, described insulating barrier (3) extrudes with crosslinked polyethylene for material and forms.

Full stop water electric wire the most according to claim 1, it is characterised in that: described interior silicon layer (2) is by benzene first Base silicone oil coats and is formed.

Full stop water electric wire the most according to claim 1, it is characterised in that: described outer silicon layer (4) is by modification Silicone oil coats and is formed.

Full stop water electric wire the most according to claim 1, it is characterised in that the implant that blocks water described in: (5) is for filling out Fill the water-proofing powder in the insulation core wire gap that blocks water.

Full stop water electric wire the most according to claim 1, it is characterised in that the implant that blocks water described in: (5) is for filling out Fill the water blocking yarn in the insulation core wire gap that blocks water.

Full stop water electric wire the most according to claim 1, it is characterised in that the belting layer (7) that blocks water described in: is by half Waterstop is wrapped forms for conduction, and this semi-conducting water-resistant tape Duplication is 20% 30%.

Full stop water electric wire the most according to claim 1, it is characterised in that: described inner sheath (8) is poly-with crosslinking Ethylene is that material extrudes and forms.

Full stop water electric wire the most according to claim 1, it is characterised in that: described oversheath (10) is by high density Polythene material extrudes and forms.

Full stop water electric wire the most according to claim 1, it is characterised in that: described armor (9) is by galvanized steel Carry wrapped forming.