CN105321627B - 6～35kV of rated voltage high resiliency warp resistance wind energy cables and manufacture method - Google Patents
6～35kV of rated voltage high resiliency warp resistance wind energy cables and manufacture method Download PDFInfo
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- CN105321627B CN105321627B CN201510888550.6A CN201510888550A CN105321627B CN 105321627 B CN105321627 B CN 105321627B CN 201510888550 A CN201510888550 A CN 201510888550A CN 105321627 B CN105321627 B CN 105321627B
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- 238000009954 braiding Methods 0.000 claims abstract description 31
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- 229920000742 Cotton Polymers 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims abstract description 7
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention discloses a kind of 6～35kV of rated voltage high resiliency warp resistance wind energy cable, cable core is constituted by three kinetic insulation cores and three ground insulation cores are stranded, overlapped outside cable core successively and be surrounded with double-deck alkali-free glass fiber band, be extruded with thermoplastic elastomer (TPE) oversheath, the outermost layer of cable is the braiding layer of stainless steel silk and polyesters synthetic fiber yarn composition；Each kinetic insulation core is by tin plating copper free wire, stainless steel silk is stranded constitutes conductor, overlaps and be surrounded with monolayer semiconductive cotton tape lapping layer outside conductor, and three-layer co-extruded have conductor shield, ethylene propylene diene rubber insulating barrier and insulation screen to constitute kinetic insulation core；Semi-conductive rubber screen layer is extruded with outside each ground insulation cable core conductor.Cable of the present invention has the characteristics such as high-tensile, high-flexibility, high abrasion, oil resistant, the ageing-resistant, weather of resistance to external environment, it is adaptable to turbine and tower junction or its similar applications in high power wind-mill generating equipment.
Description
The application is the divisional application of Application No. 2014101345644
Technical field：
The present invention relates to a kind of 6～35kV of rated voltage high resiliency warp resistance wind energy cables and manufacture method.
Background technology：
Wind energy is increasingly paid attention to by countries in the world as a kind of regenerative resource of cleaning.Its reserves is huge, entirely
Sportsmanship energy total resources about 2.74 × 109MW, wherein available wind energy are 2 × 107MW.Wind Energy In China reserves are very big, distribution
Wide, the wind energy content of only land just has about 2.53 hundred million kilowatts, and developing and utilizingpotentiality is huge.
In recent years, affected by international macroeconomic situation, Chinese Economy Development speed eases up.Domestic demand is pulled for strong, warp is kept
Ji society develops smoothly and faster, and government increases the investment in fixed assets dynamics to traffic, energy field, and supporting and encourageing can be again
Raw energy development.Used as the new forms of energy of energy-conserving and environment-protective, Wind Power Generation Industry wins historic opportunity to develop, wreaks havoc not in financial crisis
Raise up against the market in sharp environment, growth momentum is swift and violent, by the end of the beginning of this year, existing 25 provinces in the whole nation, municipality directly under the Central Government, autonomous region's tool
There is wind-powered electricity generation to install.
The development prospect of the generation of electricity by new energy industry such as China Wind Power is very wide, it is contemplated that following a very long time will all protect
High speed development is held, while profitability also will be lifted with the gradually ripe of technology steadily.With Wind Power In China install domestic
The scale that changes and generate electricity, wind power cost are expected to drop again.Therefore wind-powered electricity generation starts the ground by gold for becoming more and more investor.Wind
Electric field construction, generate electricity by way of merging two or more grid systems, the field such as wind power equipment manufacture becomes the bright spot of investment, market prospect is had an optimistic view of.
But, the development of wind energy cable is but seriously delayed, and reason is that wind energy cable requirement has warp resistance, resistance to height
Temperature, there is the technical specification such as high resiliency, domestic a lot of cable producers do not have such technical conditions.
Content of the invention：
For overcoming the defect of prior art, it is an object of the invention to provide a kind of 6～35kV of rated voltage high resiliency is resistance to
Distortion wind energy cable and manufacture method, cable have high-tensile, high-flexibility, high abrasion, oil resistant, ageing-resistant, the resistance to external world
The characteristics such as amblent air temperature, while also have many excellent functions such as high bending winding, resistance to torsion, anti-dragging, environmental protection, it is adaptable to
Turbine and tower junction or its similar applications in high power wind-mill generating equipment.
The present invention solves technical problem and adopts the following technical scheme that：
Rated voltage 6～35kV high resiliency warp resistance wind energy cables, by three kinetic insulation cores and three ground insulations
The stranded composition cable core of core, overlaps outside the cable core successively and is surrounded with double-deck alkali-free glass fiber band, is extruded with thermoplastic elastomer (TPE)
Oversheath, the outermost layer of cable is that stainless steel silk constitutes braiding layer with polyesters synthetic fiber yarn；
Each kinetic insulation core is by tin plating copper free wire, stainless steel silk is stranded constitutes conductor, overlaps wrapped outside conductor
There is monolayer semiconductive cotton tape lapping layer, the lapping layer is three-layer co-extruded outward conductor shield, ethylene propylene diene rubber insulating barrier
Kinetic insulation core is constituted with insulation screen；
Each ground insulation core is by tin plating copper free wire, stainless steel silk is stranded constitutes conductor, extrudes outside the conductor
There is semi-conductive rubber screen layer.
The preparation method of wind energy cable of the present invention, which comprises the following steps：
Step A, conductor make；According to the single line radical of composition cable different cross section, during bundle strand conductor in tinned copper wire
Stainless steel silk reinforcement is uniformly added into, tinned copper wire and stainless steel silk answer diameter close, and diameter allowable tolerance is ± 0.2mm, tin plating
Copper wire is 8 with stainless steel silk radical ratio:Joint is not allow in the middle of 1, and tin plated wire and stainless steel silk；Overlap outside conductor wrapped
Monolayer semiconductive cotton tape, puts up rate not less than 15%；
The maximum gauge of conductor single line should meet the regulation of the 5th kind of tin plating soft copper conductor in GB/T3956-2008；In conductor
Strand is twisted to twisting during with multiple strand to identical, and outer layer is twisted to for left-hand；Its stranded lay ratio should be not more than the regulation of following table：
Step B, kinetic insulation core make；Three-layer co-extruded technique, i.e. conductor shield+ternary second is adopted outside the conductor
Third rubber insulation+insulation screen, three layers of extrusion molding；Conductor shield extruded material is nonmetallic semiconductive material,
Its most minimal thickness is 0.6mm；Insulation shielding layer material is nonmetallic semiconductive material, and its most minimal thickness is 0.8mm；Rated voltage
8.7/15kV and following cable insulation material are 10kV EPT rubber Insulation Materials, the above cable of rated voltage 8.7/15kV
Insulant is 35kV EPT rubber Insulation Materials, and insulating barrier thinnest point is not less than the 90%-0.1mm of nominal value, and puts down
Thickness is not less than nominal value, and its nominal thickness should meet the regulation of following table：
Insulated wire cores extrusion die adopts squash type, and when mould is matched, core rod and die sleeve internal diameter are held by following provisions respectively
OK：
Core rod internal diameter：DCore=D0+2ε
Middle mold internal diameter：DInterior=D0+2δInterior*1.05
Die sleeve internal diameter：DOutward=D0+2(δInterior+ 1.1* insulation thickness+δOutward)
Wherein：D0For core external diameter before extrusion, ε was line surplus, δInteriorFor interior screen thickness, δOutwardFor external screen thickness；Cross more than line
The selection of amount ε, meets the regulation of following table：
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；Speed of production allows appropriate
Adjustment is most preferably defined by actual cure efficiency；
Step C, ground insulation core make；Outer using extruding semi-conductive rubber screen layer, ground insulation core in conductor
Thickness is defined not less than the 75% of kinetic insulation core external diameter by ensureing its external diameter, and extrusion die adopts squash type, mould to match
When core rod and die sleeve internal diameter respectively by following provisions execute：
Core rod internal diameter：DCore=D0+ε
Wherein：D0For core external diameter before extrusion, ε was line surplus；
The selection of line surplus ε is crossed, meets the regulation of following table：
Die sleeve internal diameter：DSet=D0+ 2 δ-(0.1～0.4) mm；
Wherein：D0For core external diameter before extrusion, δ is semi-conductive rubber shielding thickness；
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；Speed of production allows appropriate
Adjustment is most preferably defined by actual cure efficiency；
Step D, three kinetic insulation cores and three ground insulation cores carry out dextrad stranding, during stranding,
Each core tension force is uniform, and insulated wire cores are alternately arranged according to piece ground connection core of a power wire core, stranding lay ratio control
Between 12～14, rounding is filled using the rope made of hemp in cable core gap to system, and doubling mould is chosen according to laying up diameter, crosses line surplus control
System overlaps wrapped double-deck alkali-free glass fiber band between 0.5～1.0mm outside cable core, overlap wrapped put up rate 25%～30% it
Between, wrapped using left-hand when wrapped；
Step E, described in step D alkali-free glass fiber band outer layer thermoplastic elastomer (TPE) oversheath is extruded using plsitive mold,
Protective cover material is dried before extrusion, and between 100～115 DEG C, the time is 1.0～2.5 hours, and sheath is squeezed for baking temperature control
Go out the regulation that temperature meets following table：
| Extruding machine region | Temperature/DEG C |
| Charging | 95～105 |
| Bringing-up section 1 | 120～130 |
| Bringing-up section 2 | 135～145 |
| Bringing-up section 3 | 155～165 |
| Machine neck | 160～170 |
| Head | 165～175 |
| Die sleeve | 160～170 |
Sheath nominal thickness is calculated according to the computational methods of GB/T12706.1-2008 national standards, and thinnest point is not little
In the 85%-0.1mm of nominal value, average thickness is not less than nominal value；
Step F, braiding layer is woven outside sheath, braiding layer is made up of with polyesters synthetic fiber yarn stainless steel silk, both
Number of spindles identical, in opposite direction；Braiding layer does not allow entirety to continue, and the end of a thread for exposing should be had one's hair trimmed, and allows to change in every 1m length
One metal wire bar；
According to IEC60092-376：2003 international standards, select per share radical and filament diameter to require to carry out and silk, and
Thread tension is uniform, and stainless steel silk joint is welded using cold welding machine, pad should smooth, rounding, without substantially raised, simultaneously silk is wide for fiber
Degree should be identical with tinsel silk width, and after the completion of silk, bobbin on braider, more gear changing adjusts braider
Pitch and tension force woven, when weave line diameter be below 0.2mm when, braider starting up speed control in maximum functional
The 60%～70% of speed, when braiding line diameter is more than 0.2mm, braider starting up speed is controlled in maximum operating speed
50%～60%；
Braiding lay ratio be that pitch length/braiding layer average diameter is controlled between 2～4.5, and count is not less than
90%；
The computing formula of count is：
M=2F-F2(1)
F=and'/[π (D+2d') cos α] (2)
Tg α=[π (d "+2d')]/H (3)
Kr=1+ [π (d "+2d')/H]2}-1/2(4)
In formula：M is total coverage coefficient for count, and F is that one side covers braiding coefficient, and tg α are braid angle tangent, and Kr is
Braiding coefficient, H are lay of braiding, and d' is line diameter after braiding, and a is half number of spindle unit of braiding, and for weaving doubling radical, α is volume to n
" line diameter before braiding, D are the outside diameter of cable after extrusion to knit angle, d.
Compared with the prior art, beneficial effects of the present invention are embodied in：
1st, single line radical of the conductor of the present invention according to composition cable different cross section, uniform in tinned copper wire during bundle strand conductor
Stainless steel silk is added to strengthen, diameter close (diameter allowable tolerance is ± 0.2mm) answered by tin plated wire and stainless steel silk, and its radical ratio is about
For 8:Joint is not allow in the middle of 1, and tin plated wire and stainless steel silk, the tensile strength of cable is substantially increased, while guaranteeing
Cable keeps excellent electric property, and flexible winding, dragging, long service life in running.
2nd, cable of the present invention adopts 3+3 symmetrical structures, using semi-conductive rubber is extruded outside 3 wire cores, replaces traditional 3
Metal screen layer outside root kinetic insulation core；Alternately arranged using 3 kinetic insulation cores and 3 ground insulation cores during stranding
Row, make ground insulation core closely coupled with the insulation screen of kinetic insulation core, reach and replace cable metallic screens layer
Effect, it is ensured that cable has excellent electric property, mechanical performance and softness.
3rd, ground insulation external diameter of the present invention not less than kinetic insulation core external diameter 75%, power wire core and ground connection core
External diameter is differed by fixed proportion, both ensure that the shielding propertiess of cable, is conducive to the warp resistance performance for improving cable again.
4th, anti-modified TPE elastomer is extruded in the present invention, original TPE material is improved, not only have excellent
Elasticity, toughness, intensity, while many other materials are incomparable have the advantages that good resistance to environment is corrosion-resistant etc..This is new
Material using ensure that cable has high-tensile, high-flexibility, high winding, high abrasion, oil resistant, ageing-resistant, the resistance to external world
The characteristics such as amblent air temperature, environmental protection, fully meet the use requirement of wind-power torsion-resistant song flexible cable.
5th, the present invention is using stainless steel silk and polyamide is woven or polyesters synthetic fiber yarn is used as outer jacket, greatly improves
The bending property of cable and tensile strength, while being effectively protected the damage of sheath, improve the service life of cable.
Description of the drawings：
Fig. 1 is the structural representation of cable of the present invention.
Label in figure：1 tin plating copper free wire, 2 stainless steel silks, 3 lapping layers, 4 conductor shields, 5 ethylene propylene diene rubbers are exhausted
Edge layer, 6 insulation screens, 7 semi-conductive rubber screen layers, 8 alkali-free glass fiber bands, 9 oversheaths, 10 braiding layers.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment：
Embodiment：Rated voltage 6～35kV high resiliency warp resistance wind energy cables of the present invention, by three kinetic insulation cores
With the stranded composition cable core of three ground insulation cores, overlapped outside cable core successively and be surrounded with double-deck alkali-free glass fiber band 8, be extruded with heat
Thermoplastic elastic oversheath 9, the outermost layer of cable are the braiding layer 10 of stainless steel silk and polyesters synthetic fiber yarn composition；
Each kinetic insulation core is by tin plating copper free wire 1, stainless steel silk 2 is stranded constitutes conductor, overlaps and be surrounded with outside conductor
Monolayer semiconductive cotton tape lapping layer 3, three-layer co-extruded outside the lapping layer 3 have conductor shield 4, ethylene propylene diene rubber insulating barrier
5 and insulation screen 6 constitute kinetic insulation core；
Each ground insulation core is by tin plating copper free wire, stainless steel silk is stranded constitutes conductor, is extruded with half outside the conductor
Conductive rubber shield layer 7.
The preparation method of wind energy cable of the present invention, which comprises the following steps：
Step A, conductor make；According to the single line radical of composition cable different cross section, during bundle strand conductor in tinned copper wire
Stainless steel silk reinforcement is uniformly added into, tinned copper wire and stainless steel silk answer diameter close, and diameter allowable tolerance is ± 0.2mm, tin plating
Copper wire is 8 with stainless steel silk radical ratio:Joint is not allow in the middle of 1, and tin plated wire and stainless steel silk；Overlap outside conductor wrapped
Monolayer semiconductive cotton tape, puts up rate not less than 15%；
The maximum gauge of conductor single line should meet the regulation of the 5th kind of tin plating soft copper conductor in GB/T3956-2008；In conductor
Strand is twisted to twisting during with multiple strand to identical, and outer layer is twisted to for left-hand；Its stranded lay ratio should be not more than the regulation of following table：
Step B, kinetic insulation core make；Three-layer co-extruded technique, i.e. conductor shield+ternary second is adopted outside the conductor
Third rubber insulation+insulation screen, three layers of extrusion molding；Conductor shield extruded material is nonmetallic semiconductive material,
Its most minimal thickness is 0.6mm；Insulation shielding layer material is nonmetallic semiconductive material, and its most minimal thickness is 0.8mm；Rated voltage
8.7/15kV and following cable insulation material are 10kV EPT rubber Insulation Materials, the above cable of rated voltage 8.7/15kV
Insulant is 35kV EPT rubber Insulation Materials, and insulating barrier thinnest point is not less than the 90%-0.1mm of nominal value, and puts down
Thickness is not less than nominal value, and its nominal thickness should meet the regulation of following table：
Insulated wire cores extrusion die adopts squash type, and when mould is matched, core rod and die sleeve internal diameter are held by following provisions respectively
OK：
Core rod internal diameter：DCore=D0+2ε
Middle mold internal diameter：DInterior=D0+2δInterior*1.05
Die sleeve internal diameter：DOutward=D0+2(δInterior+ 1.1* insulation thickness+δOutward)
Wherein：D0For core external diameter before extrusion, ε was line surplus, δInteriorFor interior screen thickness, δOutwardFor external screen thickness；
The selection of line surplus ε is crossed, meets the regulation of following table：
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；Speed of production allows appropriate
Adjustment is most preferably defined by actual cure efficiency；
Step C, ground insulation core make；Outer using extruding semi-conductive rubber screen layer, ground insulation core in conductor
Thickness is defined not less than the 75% of kinetic insulation core external diameter by ensureing its external diameter, and extrusion die adopts squash type, mould to match
When core rod and die sleeve internal diameter respectively by following provisions execute：
Core rod internal diameter：DCore=D0+ε
Wherein：D0For core external diameter before extrusion, ε was line surplus；
The selection of line surplus ε is crossed, meets the regulation of following table：
Die sleeve internal diameter：DSet=D0+ 2 δ-(0.1～0.4) mm；
Wherein：D0For core external diameter before extrusion, δ is semi-conductive rubber shielding thickness；
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；Speed of production allows appropriate
Adjustment is most preferably defined by actual cure efficiency；
Step D, three kinetic insulation cores and three ground insulation cores carry out dextrad stranding, during stranding,
Each core tension force is uniform, and insulated wire cores are alternately arranged according to piece ground connection core of a power wire core, stranding lay ratio control
Between 12～14, rounding is filled using the rope made of hemp in cable core gap to system, and doubling mould is chosen according to laying up diameter, crosses line surplus control
System overlaps wrapped double-deck alkali-free glass fiber band between 0.5～1.0mm outside cable core, overlap wrapped put up rate 25%～30% it
Between, wrapped using left-hand when wrapped；
Step E, described in step D alkali-free glass fiber band outer layer thermoplastic elastomer (TPE) oversheath is extruded using plsitive mold,
Protective cover material is dried before extrusion, and between 100～115 DEG C, the time is 1.0～2.5 hours, and sheath is squeezed for baking temperature control
Go out the regulation that temperature meets following table：
| Extruding machine region | Temperature/DEG C |
| Charging | 95～105 |
| Bringing-up section 1 | 120～130 |
| Bringing-up section 2 | 135～145 |
| Bringing-up section 3 | 155～165 |
| Machine neck | 160～170 |
| Head | 165～175 |
| Die sleeve | 160～170 |
Sheath nominal thickness is calculated according to the computational methods of GB/T12706.1-2008 national standards, and thinnest point is not little
In the 85%-0.1mm of nominal value, average thickness is not less than nominal value；
Step F, braiding layer is woven outside sheath, braiding layer is made up of with polyesters synthetic fiber yarn stainless steel silk, both
Number of spindles identical, in opposite direction；Braiding layer does not allow entirety to continue, and the end of a thread for exposing should be had one's hair trimmed, and allows to change in every 1m length
One metal wire bar；
According to IEC60092-376：2003 international standards, select per share radical and filament diameter to require to carry out and silk, and
Thread tension is uniform, and stainless steel silk joint is welded using cold welding machine, pad should smooth, rounding, without substantially raised, simultaneously silk is wide for fiber
Degree should be identical with tinsel silk width, and after the completion of silk, bobbin on braider, more gear changing adjusts braider
Pitch and tension force woven, when weave line diameter be below 0.2mm when, braider starting up speed control in maximum functional
The 60%～70% of speed, when braiding line diameter is more than 0.2mm, braider starting up speed is controlled in maximum operating speed
50%～60%；
Braiding lay ratio be that pitch length/braiding layer average diameter is controlled between 2～4.5, and count is not less than
90%；
The computing formula of count is：
M=2F-F2(1)
F=and'/[π (D+2d') cos α] (2)
Tg α=[π (d "+2d')]/H (3)
Kr=1+ [π (d "+2d')/H]2}-1/2(4)
In formula：M is total coverage coefficient for count, and F is that one side covers braiding coefficient, and tg α are braid angle tangent, and Kr is
Braiding coefficient, H are lay of braiding, and d' is line diameter after braiding, and a is half number of spindle unit of braiding, and for weaving doubling radical, α is volume to n
" line diameter before braiding, D are the outside diameter of cable after extrusion to knit angle, d.
In cable making method implementation process of the present invention, it should be noted that below some：
1st, according to the single line radical of composition cable different cross section, rustless steel is uniformly added into during bundle strand conductor in tinned copper wire
Silk is strengthened, and can not there is joint in the middle of ensureing, to guarantee the tensile property and bending, softness of cable.
2nd, when kinetic insulation core is extruded, insulant must assure that cleaning, and be produced using squash type, in production process
Sulfuration steam pressure, curingprocess rate is controlled, and adjusts mould, forbid that eccentric appearance, sulfuration inequality, broken hole etc. are bad existing
As.
3rd, when ground insulation core is extruded, insulant is necessary for semi-conductive rubber material, and is produced using squash type, raw
Sulfuration steam pressure, curingprocess rate is controlled during product, and adjusts mould, forbid eccentric, sulfuration inequality, broken hole etc. occur
Bad phenomenon, and note control ground insulation external diameter not less than the 75% of kinetic insulation core external diameter.
4th, stranding adopts the symmetrical strandings of 3+3, insulated wire cores to be alternately arranged according to 1 power wire core, 1 ground connection core, core
Tension force is uniform, and the control of stranding lay ratio is between 12～14, it is to avoid the frequent shifting of cable core in bending moving process
Move and cause the phenomenons such as the extruding of core, stretching and destroy the insulating properties of core；Wrapped suitable bag should be overlapped outside cable core
Band, does not allow bottom pour ladle, wrapped loose phenomenon occur.
5th, the modified TPE elastomer sheath of oversheath extrusion, it should be noted that the product quality of protective cover material, forbids occurring getting damp waiting showing
As, and carry out certain drying and processing before extrusion, extrusion temperature will control suitable scope, with ensure good plasticizing and
Perfect technical matters.
6th, stainless steel silk and polyamide or polyesters synthetic fiber yarn composite armor are woven as the external protection of cable,
Must assure that being convinced of its outward appearance, impulse- free robustness, without phenomenons such as leaks, it is desirable to when weaving, braiding thread tension is consistent, and pitch will be controlled
Make, joint should process smooth, forbid braiding layer the bad phenomenon such as burr, eye occur, to ensure the electric conductivity of cable
And electric property.
Claims (1)
1. 6～35kV of rated voltage high resiliency warp resistance wind energy cable, it is characterised in that by three kinetic insulation cores and three
The stranded composition cable core of ground insulation core, overlaps outside the cable core successively and is surrounded with double-deck alkali-free glass fiber band (8), is extruded with heat
Thermoplastic elastic oversheath (9), the outermost layer of cable are the braiding layer (10) of stainless steel silk and polyesters synthetic fiber yarn composition；
Each kinetic insulation core is by tin plating copper free wire (1), stainless steel silk (2) is stranded constitutes conductor, overlap outside conductor around
Monolayer semiconductive cotton tape lapping layer (3) is surrounded by, lapping layer (3) are three-layer co-extruded outward conductor shield (4), EPDM
Rubber insulation (5) and insulation screen (6) constitute kinetic insulation core；
Each ground insulation core is by tin plating copper free wire (1), stainless steel silk (2) is stranded constitutes conductor, squeezes outside the conductor
It is surrounded by semi-conductive rubber screen layer (7)；
The preparation method of described wind energy cable, which comprises the following steps：
Step A, conductor make；According to the single line radical of composition cable different cross section, uniform in tinned copper wire during bundle strand conductor
Stainless steel silk is added to strengthen, tinned copper wire and stainless steel silk answer diameter close, diameter allowable tolerance is ± 0.2mm, tinned copper wire
It is 8 with stainless steel silk radical ratio:Joint is not allow in the middle of 1, and tin plated wire and stainless steel silk；Wrapped monolayer is overlapped outside conductor
Semiconductive cotton tape, puts up rate not less than 15%；
The maximum gauge of conductor single line should meet the regulation of the 5th kind of tin plating soft copper conductor in GB/T3956-2008；Strand in conductor
Twist to twisting during with multiple strand to identical, outer layer is twisted to for left-hand；Its stranded lay ratio should be not more than the regulation of following table：
Step B, kinetic insulation core make；Three-layer co-extruded technique, i.e. conductor shield+ethylene-propylene-diene monomer is adopted outside the conductor
Glue insulating barrier+insulation screen, three layers of extrusion molding；Conductor shield extruded material is nonmetallic semiconductive material, and which is most
Minimal thickness is 0.6mm；Insulation shielding layer material is nonmetallic semiconductive material, and its most minimal thickness is 0.8mm；Rated voltage 8.7/
15kV and following cable insulation material are 10kV EPT rubber Insulation Materials, the above cable insulation of rated voltage 8.7/15kV
Material is 35kV EPT rubber Insulation Materials, 90%-0.1mm of the insulating barrier thinnest point not less than nominal value, and average thickness
Degree is not less than nominal value, and its nominal thickness should meet the regulation of following table：
Insulated wire cores extrusion die adopts squash type, and when mould is matched, core rod and die sleeve internal diameter are executed by following provisions respectively：
Core rod internal diameter：DCore=D0+2ε
Middle mold internal diameter：DInterior=D0+2δInterior*1.05
Die sleeve internal diameter：DOutward=D0+2(δInterior+ 1.1* insulation thickness+δOutward)
Wherein：D0For core external diameter before extrusion, ε was line surplus, δInteriorFor interior screen thickness, δOutwardFor external screen thickness；
The selection of line surplus ε is crossed, meets the regulation of following table：
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；
Step C, ground insulation core make；Outer using extruding semi-conductive rubber screen layer, ground insulation core thickness in conductor
To ensure that its external diameter is defined not less than the 75% of kinetic insulation core external diameter, extrusion die adopts squash type, mould when mould is matched
Core and die sleeve internal diameter are executed by following provisions respectively：
Core rod internal diameter：DCore=D0+ε
Wherein：D0For core external diameter before extrusion, ε was line surplus；
The selection of line surplus ε is crossed, meets the regulation of following table：
Die sleeve internal diameter：DSet=D0+ 2 δ-(0.1～0.4) mm；
Wherein：D0For core external diameter before extrusion, δ is semi-conductive rubber shielding thickness；
Steam pressure in curing tube, sulfuration linear speed and temperature control parameter such as following table during extrusion；
Step D, three kinetic insulation cores and three ground insulation cores carry out dextrad stranding, during stranding, each line
Core tension force is uniform, and insulated wire cores are alternately arranged according to piece ground connection core of a power wire core, and the control of stranding lay ratio exists
Between 12～14, rounding is filled using the rope made of hemp in cable core gap, and doubling mould is chosen according to laying up diameter, crosses the control of line surplus and exists
Between 0.5～1.0mm, wrapped double-deck alkali-free glass fiber band outside cable core, is overlapped, overlap wrapped rate of putting up between 25%～30%, around
Wrapped using left-hand during bag；
Step E, described in step D alkali-free glass fiber band outer layer thermoplastic elastomer (TPE) oversheath, sheath are extruded using plsitive mold
Material is dried before extrusion, and between 100～115 DEG C, the time is 1.0～2.5 hours, sheathing temperature for baking temperature control
Degree meets the regulation of following table：
Sheath nominal thickness is calculated according to the computational methods of GB/T12706.1-2008 national standards, and thinnest point is not less than mark
The 85%-0.1mm of title value, average thickness are not less than nominal value；
Step F, braiding layer (10) is woven outside sheath, braiding layer is made up of with polyesters synthetic fiber yarn stainless steel silk, both
Number of spindles identical, in opposite direction；Braiding layer does not allow entirety to continue, and the end of a thread for exposing should be had one's hair trimmed, and allows to change in every 1m length
One metal wire bar；
According to IEC60092-376：2003 international standards, select per share radical and filament diameter to require to carry out and silk, and silk
Power is uniform, and stainless steel silk joint is welded using cold welding machine, pad should smooth, rounding, without substantially raised, fiber silk width is answered
Identical with tinsel silk width, and after the completion of silk, bobbin on braider, more gear changing adjusts the section of braider
Away from being woven with tension force, when braiding line diameter is below 0.2mm, braider starting up speed is controlled in maximum operating speed
60%～70%, when weave line diameter be more than 0.2mm when, braider starting up speed control in maximum operating speed
50%～60%；
Braiding lay ratio be that pitch length/braiding layer average diameter is controlled between 2～4.5, and count is not less than 90%；
The computing formula of count is：
M=2F-F2(1)
F=and'/[π (D+2d') cos α] (2)
Tg α=[π (d "+2d')]/H (3)
Kr=1+ [π (d "+2d')/H]2}-1/2(4)
In formula：M is total coverage coefficient for count, and F is that one side covers braiding coefficient, and tg α are braid angle tangent, and Kr is braiding
Coefficient, H are lay of braiding, and d' is line diameter after braiding, and for weaving half number of spindle unit, for weaving doubling radical, α is braiding to n to a
Line diameter before angle, d " braidings, D are the outside diameter of cable after extrusion.
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| CN201510888550.6A CN105321627B (en) | 2014-04-02 | 2014-04-02 | 6～35kV of rated voltage high resiliency warp resistance wind energy cables and manufacture method |
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| JP4267419B2 (en) * | 2003-10-14 | 2009-05-27 | タツタ電線株式会社 | Wind power generator cable |
| JP2012221597A (en) * | 2011-04-04 | 2012-11-12 | Viscas Corp | Cv cable |
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| CN202694972U (en) * | 2012-07-20 | 2013-01-23 | 浙江万马电缆股份有限公司 | 26/35kV twist-resistant flexible cable for offshore wind power generation |
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| CN203760164U (en) * | 2014-04-02 | 2014-08-06 | 新亚特电缆股份有限公司 | High-elastic torsion-resistant wind energy cable with nominal voltage of 6 to 35kV |
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