CN206003544U - ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables - Google Patents

Abstract

The utility model discloses one kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables, it is combined copper strips screen layer, the second semiconductive water-blocking buffer layer, aluminium-plastic tape, insulation outer jacket and semi-conductive layer including heavy in section SZ shape molded line conductor, conductor shield, insulating barrier, insulation screen, the first semiconductive water-blocking buffer layer, fiber unit, copper wire；Described heavy in section SZ shape molded line conductor is formed by center core and outer layer SZ shape copper monofilament layer-stranding, according to different conductor section demand, outer layer SZ shape copper monofilament presses stranded circular core stranded 16 layers SZ shape copper monofilament not etc. outward using a circular copper single line or using many circular single lines.This utility model adopts heavy in section SZ shape molded line conductor, conductor structure is stable, tight, activity coefficient is not less than 93%, compares round compacted comductor or milliken conductor has less conductor diameter under identical current capacity, and cable overall cost input is greatly saved.

Description

± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables

Technical field

This utility model is related to a kind of cable, is the heavy in section SZ shape molded line of ± 500kV particularly to a kind of electric pressure Conductor brass wire shielding form Optical Fiber Composite direct current cables, this utility model belongs to technical field of cable.

Background technology

Technology of HVDC based Voltage Source Converter is little because of its circuit low cost, line loss, system stability, active power and reactive power Control flexibly, reliable, facilitate the advantages such as built by separate periods and compatilizing mechanism to receive significant attention, join in isolated island power transmission, city The capacity-increasing transformation of electrical network, AC system interconnection, the field such as large-scale wind power field is grid-connected, and be widely used.

Flexible direct current cable is one of critical equipment of Technology of HVDC based Voltage Source Converter, and it is defeated that flexible DC power transmission avoids exchange The kelvin effect of electric process and kindred effect, and flexible DC power transmission longer, the continuous production of long length insulated wire cores of distance Advantageously reduce cables manufacturing cost, therefore in most cases flexible direct current cable large size conductor is not typically led using segmentation Body form.For section in 2000mm²Following flexible direct current extra large cable conductor, presses circular stranded conductor and can meet its structure Design and continuous production requirement, and effectively realize the longitudinal water-blocking of conductor, existing multinomial engineer applied both at home and abroad.But work as and lead Body section is more than 2000mm², most monofilament radical energy power restrictions of being can be done by by current conductor strand equipment, realize further Increasing section can only rely on increase filament diameter, easily caused monofilament gap larger and press coefficient less than normal the drawbacks of, after being Continuous insulating exruded production brings bigger difficulty, and larger conductor diameter causes the rising of cable holistic cost, therefore needs The heavy in section water-blocking conductor of new structure to be developed adapts to higher transmission capacity and higher voltage grade flexible DC power transmission needs.

The main range of application of alternating current-direct current high voltage power cable concentrates on field of power transmission, by the construction of cable, manufacturing process and The impact of capacity of equipment, different from high-voltage undersea cable, the alternating current-direct current high voltage power cable of application in land ultra-high-tension power transmission line Also rare Optical Fiber Composite product puts into application at present, is all the side using optical cable and electrical cables separate in traditional land transmission line of electricity Formula come to complete communications or to cable implement monitoring, therefore bring to product cost, engineering difficulty and monitoring effect Etc. aspect the drawbacks of.

Utility model content

Utility model purpose：The purpose of this utility model is to solve deficiency of the prior art, providing a kind of filling Coefficient is higher, structure is more excellent, be conducive to long length quantity-produced form of conductors, and achieves fiber optic communication and power transmission Function and service；Provide a kind of with better function, ± 500kV flexible direct current cable product that production cost is lower and reliable and practical Scheme, meets the construction needs of national DC transmission engineering, is favorably improved the international competitiveness of China's power industry.

Technical scheme：One kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current described in the utility model Cable, blocks water buffering including heavy in section SZ shape molded line conductor, conductor shield, insulating barrier, insulation screen, the first semiconductive Layer, fiber unit, copper wire be combined copper strips screen layer, the second semiconductive water-blocking buffer layer, aluminium-plastic tape, insulation outer jacket and Semi-conductive layer；

Described heavy in section SZ shape molded line conductor is externally provided with conductor shield, is externally provided with insulating barrier in conductor shield, exhausted Edge layer is externally provided with insulation screen, is externally provided with the first semiconductive water-blocking buffer layer in insulation screen, blocks water in the first semiconductive Cushion is externally provided with copper wire and is combined copper strips screen layer, and being combined copper strips screen layer in copper wire has fiber unit with layer is stranded, in optical fiber Unit and copper wire are combined copper strips screen layer and are externally provided with the second semiconductive water-blocking buffer layer, in the second semiconductive water-blocking buffer layer peripheral hardware There is aluminium-plastic tape, be externally provided with insulation outer jacket in aluminium-plastic tape, be externally provided with semi-conductive layer in insulation outer jacket；

Described heavy in section SZ shape molded line conductor is formed by center core and outer layer SZ shape copper monofilament layer-stranding, according to not With cross-sectional area of conductor demand, center core using a circular copper single line or using many circular single lines press stranded form, in The SZ shape copper monofilament that the outer stranded 1-6 layer of heart core does not wait, S-shaped copper single line stranded layer and Z-shaped copper single line stranded layer interval when stranded Place.

Further, described conductor shield is made up of semiconductive strapping tape and extrusion conductor shielding two parts, extrusion Conductor shielding part and described insulation screen are all using the unidirectional current with ultra-smooth performance, high conduction performance and thermosetting property The special semiconductive material of cable is made, and described insulating barrier adopts direct current cables special ultra-clean thermoset crosslink polyethylene Insulation Material system Become.

Further, described first semiconductive water-blocking buffer layer and the second semiconductive water-blocking buffer layer be by two layer by layer or more Multi-layered thickness is the wrapped effect made, play buffer protection and longitudinal water-blocking of semi-conductive buffer water-blocking band of 2.0mm.

Further, the compound copper strips screen layer of described copper wire adopts the homogeneous stranded rear outer layer in round copper wire gap of diameter reverse Tie up copper strips to form, described fiber unit is positioned in copper strips and is completed stranded together with round copper wire, requires copper wire to be combined when stranded Copper strip shielding in the layer copper wire overall distribution is uniform, and the round copper wire of every fiber unit both sides is close to fiber unit and is placed, with The stainless steel tube external diameter of Shi Yaoqiu fiber unit is slightly less than round copper wire external diameter.

Further, described aluminium-plastic tape adopts double-sided aluminum plastic composite band vertical bag outside the second semiconductive water-blocking buffer layer After molding, bonding forms, and what the aluminium-plastic tape after vertical bag left one fixed width puts up part, makes to mould layer using the baking of baking the affected part after applying some drugs rifle Melt and complete to paste, or pasted using adhesive special, after the completion of stickup, form radially fluid-tight sealant.

Further, described semi-conductive layer selects semiconductive jacket material and insulation outer jacket disposable by double-deck extruder Co-extrusion completes to produce, or using coated with graphite outside insulation outer jacket.

Beneficial effect：This utility model volume has the beneficial effect that：

（1）± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables is led using heavy in section SZ shape molded line Body, conductor structure is stable, tight, and activity coefficient is not less than 93%, compares round compacted comductor or divide under identical current capacity Cut conductor and there is less conductor diameter, cable overall cost input is greatly saved, in addition after inserting material water-proof material More excellent longitudinal water-blocking performance can also be obtained.

（2）± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables provides for optoelectronic integration transmission More efficient and more easily scheme, the communication of implanted or the design of thermometric optical fiber cellular construction make the guarantor of communications Temperature monitoring in shield and cable running more effectively, saves the construction cost laid with engineering of cable simultaneously.

（3）± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables meets the great Rong of nowadays power grid construction Amount transmission needs, and has filled up blank in this electric pressure for China's like product, has significantly improved the technology of China's electrical circuitry equipment Level and international competitiveness.

Brief description

Fig. 1 is construction of cable schematic diagram of the present utility model.

Specific embodiment

One kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables as shown in Figure 1, cuts including big Face SZ shape molded line conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4, the first semiconductive water-blocking buffer layer 5, optical fiber list Unit 6, copper wire are combined copper strips screen layer 7, the second semiconductive water-blocking buffer layer 8, aluminium-plastic tape 9, insulation outer jacket 10 and half Conductive layer 11；

Described heavy in section SZ shape molded line conductor 1 is externally provided with conductor shield 2, is externally provided with insulating barrier 3 in conductor shield 2, It is externally provided with insulation screen 4 in insulating barrier 3, is externally provided with the first semiconductive water-blocking buffer layer 5 in insulation screen 4, the first half Conductive water-blocking buffer layer 5 is externally provided with copper wire and is combined copper strips screen layer 7, and being combined copper strips screen layer 7 in copper wire has optical fiber with layer is stranded Unit 6, is combined copper strips screen layer 7 in fiber unit 6 and copper wire and is externally provided with the second semiconductive water-blocking buffer layer 8, leads the second half Electric water-blocking buffer layer 8 is externally provided with aluminium-plastic tape 9, is externally provided with insulation outer jacket 10 in aluminium-plastic tape 9, in insulation outer jacket 10 It is externally provided with semi-conductive layer 11.

Described heavy in section SZ shape molded line conductor 1 is formed by center core and outer layer SZ shape copper monofilament layer-stranding, according to Different conductor section demand, center core be can be set in a circular copper single line or pressed using many circular single lines stranded Form, the SZ shape copper monofilament that core outer stranded 1-6 layer in center does not wait, when stranded, S-shaped copper single line stranded layer and Z-shaped copper single line are stranded Layer is spaced apart, if cable has longitudinal water-blocking requirement to conductor, can add material water-proof material when monofilament is stranded in gap, resistance Water material requires to select waterstop, water-proofing powder or greasy for preventing water etc. according to different conductor processing technique and block-water performance Different materials.

Described conductor shield 2 is made up of semiconductive strapping tape and extrusion conductor shielding two parts.Extrusion conductor shielding Part and described insulation screen 4 are all special using the direct current cables with ultra-smooth performance, high conduction performance and thermosetting property Semiconductive material is made, and described insulating barrier 3 is made using direct current cables special ultra-clean thermoset crosslink polyethylene Insulation Material.

Described first semiconductive water-blocking buffer layer 5 and the second semiconductive water-blocking buffer layer 8 are by two-layer or more layers thickness Semi-conductive buffer water-blocking band for 2.0mm is wrapped to be made, and plays the effect of buffer protection and longitudinal water-blocking.

Described fiber unit 6 adopts the fiber unit of stainless steel structure, according to transmission need the different core numbers of internal setting and Different types of optical fiber, selects the stainless steel tube of different size, rustless steel fiber unit radical can be according to reality according to fiber number Border demand adjustment.

The compound copper strips screen layer 7 of copper wire is reversely tied up copper strips by the stranded rear outer layer in the homogeneous round copper wire gap of diameter and is formed, Fiber unit 6 is positioned over and is completed stranded, copper in requirement copper wire compound copper strips screen layer 7 when stranded in copper strips together with round copper wire Silk overall distribution is uniform, and the round copper wire of every fiber unit both sides is close to fiber unit and is placed, and requires fiber unit simultaneously Stainless steel tube external diameter is slightly less than round copper wire external diameter, in order to avoid fiber unit is subject to larger side during cable produces, installs etc. Pressure causes to damage.

Described aluminium-plastic tape 9 is bondd after the outer longitudinal tubing of semiconductive water blocking layer 8 using double-sided aluminum plastic composite band and forms, What the aluminium-plastic tape after vertical bag left one fixed width puts up part, makes to mould melting layer using the baking of baking the affected part after applying some drugs rifle and completes to paste, or Person is pasted using adhesive special, forms radially fluid-tight sealant after the completion of stickup.

Described insulation outer jacket 10 becomes to produce by extruding molding mode using polyethylene, according to cable difference use environment Require it is also possible to select that there is the material modified of the characteristic such as fire-retardant, weather-proof, outer jacket extrusion should immediately be indulged Comprehensive Preventing water layer It is carried out continuously after bag.

Described semi-conductive layer 11 can pass through double-deck extruder disposably altogether from semiconductive jacket material and insulation outer jacket Squeeze and complete to produce, it is possible to use coated with graphite is outside insulation outer jacket.

± 500kV flexible direct current cable has electric pressure height, transmission capacity is big, system design is complicated, use environment is disliked Bad changeable, product manufacturing equipment and technological requirement height etc., are the technological difficulties and technology commanding elevation that world's line cable industry is generally acknowledged.This The technical scheme of utility model employs that a kind of activity coefficient is higher, structure is more excellent, be conducive to long length quantity-produced conductor Form, and achieve the function and service of fiber optic communication and power transmission.Provide a kind of with better function, production cost lower and Reliable and practical ± 500kV flexible direct current cable product scheme, meets the construction needs of national DC transmission engineering, contributes to carrying The international competitiveness of high China power industry.

The above, be only preferred embodiment of the present utility model, not this utility model is made any formal Restriction although this utility model is disclosed above with preferred embodiment, but be not limited to this utility model, any ripe Know professional and technical personnel, in the range of without departing from technical solutions of the utility model, when in the technology of available the disclosure above Hold and make a little Equivalent embodiments changing or be modified to equivalent variations, as long as without departing from technical solutions of the utility model Hold, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, all still Belong in the range of technical solutions of the utility model.

Claims (3)

1. one kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables it is characterised in that：Including heavy in section SZ shape molded line conductor（1）, conductor shield（2）, insulating barrier（3）, insulation screen（4）, the first semiconductive water-blocking buffer layer （5）, fiber unit（6）, copper wire be combined copper strips screen layer（7）, the second semiconductive water-blocking buffer layer（8）, aluminium-plastic tape（9）、 Insulation outer jacket（10）And semi-conductive layer（11）；

Described heavy in section SZ shape molded line conductor（1）It is externally provided with conductor shield（2）, in conductor shield（2）It is externally provided with insulating barrier （3）, in insulating barrier（3）It is externally provided with insulation screen（4）, in insulation screen（4）It is externally provided with the first semiconductive water-blocking buffer layer （5）, in the first semiconductive water-blocking buffer layer（5）It is externally provided with fiber unit（6）, in fiber unit（6）There is copper wire multiple with layer is stranded Close copper strip shielding layer（7）, in fiber unit（6）It is combined copper strips screen layer with copper wire（7）It is externally provided with the second semiconductive to block water buffering Layer（8）, in the second semiconductive water-blocking buffer layer（8）It is externally provided with aluminium-plastic tape（9）, in aluminium-plastic tape（9）It is externally provided with insulation Outer jacket（10）, in insulation outer jacket（10）It is externally provided with semi-conductive layer（11）；

Described heavy in section SZ shape molded line conductor（1）Formed by center core and outer layer SZ shape copper monofilament layer-stranding, according to not With cross-sectional area of conductor demand, center core using a circular copper single line or using many circular single lines press stranded form, in The SZ shape copper monofilament that the outer stranded 1-6 layer of heart core does not wait, S-shaped copper single line stranded layer and Z-shaped copper single line stranded layer interval when stranded Place.

2. one kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables according to claim 1, its It is characterised by：Described copper wire is combined copper strips screen layer（7）Reversely tied up using the stranded rear outer layer in the homogeneous round copper wire gap of diameter Copper strips forms, described fiber unit（6）It is positioned over and in copper strips, complete stranded, requirement copper wire complex copper when stranded together with round copper wire Band screen layer（7）Interior copper wire overall distribution is uniform, and every fiber unit（6）The round copper wire of both sides is close to fiber unit and is put Put, require the stainless steel tube external diameter of fiber unit to be slightly less than round copper wire external diameter simultaneously.

3. one kind ± 500kV SZ shape molded line conductor brass wire shielding Optical Fiber Composite direct current cables according to claim 1, its It is characterised by：Described aluminium-plastic tape（9）Using double-sided aluminum plastic composite band in the second semiconductive water-blocking buffer layer（8）Indulge outward and be bundled into After type, bonding forms, and what the aluminium-plastic tape after vertical bag left one fixed width puts up part, makes to mould layer using the baking of baking the affected part after applying some drugs rifle and melts Change and complete to paste, or pasted using adhesive special, after the completion of stickup, form radially fluid-tight sealant.