CN104409165B - Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV - Google Patents
Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV Download PDFInfo
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- CN104409165B CN104409165B CN201410697083.4A CN201410697083A CN104409165B CN 104409165 B CN104409165 B CN 104409165B CN 201410697083 A CN201410697083 A CN 201410697083A CN 104409165 B CN104409165 B CN 104409165B
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- layer
- shielding layer
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- semiconductive
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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 novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV, belongs to the technical field of power cables, and aims to solve the problem that existing high-voltage-class insulated power cables do not adapt to high-voltage power transmission with nominal voltage of 750kV. The novel cross-linked-polyethylene insulated power cable is produced by a method including connectively wrapping a semiconductive nylon tape around a conduct cable core, covering the semiconductive nylon tape with an inner super-smooth semiconductive shielding layer, covering the inner super-smooth semiconductive shielding layer with a super-purified cross-linked-polyethylene insulating layer and an outer super-smooth semiconductive shielding layer, connectively wrapping a semiconductive water-blocking tape around the outer super-smooth semiconductive shielding layer, covering the semiconductive water-blocking tape with a copper-wire fiber blended cloth layer, connectively wrapping a wrinkled metal sheath around the copper-wire fiber blended cloth layer, sequentially covering the wrinkled metal sheath with a cable asphalt layer and an insulated polyvinyl chloride outer sheath, and coating the outer surface of the insulated polyvinyl chloride outer sheath with a graphitic layer. The novel cross-linked-polyethylene insulated power cable is reasonable in structural design and suitable for serving as power cables with the nominal voltage ranging from 500kV to 750kV and the like.
Description
Technical field
The invention belongs in power cable technical field one power system basic routing line in order to transmit and to distribute big
The insulated power cable of the voltage levels of power electric energy.
Background technology
Along with the growing of power industry and the continuous progress of industrial and agricultural production technology, voltage levels, transmission
Incrementally increase, therefore to electric power with the distribution heavy in section of high-power power, the demand of jumbo power transmission cable
The technology of cable requires more and more higher.In known technology, the insulated power cable of existing voltage levels
The conductor being twisted into by copper cash or the aluminum steel outside coating conductor screen layer the most successively, the crosslinking that mainly use are poly-
Ethylene insulating barrier, buffer water-blocking band, corrugated metallic sheath, cable asphalt layer, oversheath.But by its structure institute
Limit, such as the biography of high-power power of rated voltage 750kV voltage levels more than rated voltage 500kV
Defeated its proof voltage, insulating properties, water permeability and high-drop installation are just restricted with when distributing, inadaptable
The electric power transmission operation of rated voltage 750kV voltage levels.
Summary of the invention
In order to overcome deficiency of the prior art, the insulated power cable solving existing voltage levels is not suitable with volume
The problem determining the transmission operation of voltage 750kV voltage levels electric power.The purpose of the present invention is to provide a kind of structure and sets
Rationally, its proof voltage, insulating properties, water permeability and high-drop installation etc. adapt to rated voltage 500kV to meter
Electric power with up to rated voltage 750kV voltage levels transmits the novel power cable of operation.
The present invention solves the problems referred to above and be the technical scheme is that
A kind of novel power cable with cross-linked polyethylene insulation of rated voltage 750kV, it is provided with: conductor thread core,
The crosslinked polyetylene insulated layer of ultra-smooth semiconductive shielding layer, ultrapurification, semi-conductive buffer water-blocking band, corrugated metal
Sheath, cable asphalt layer, insulated type polrvinyl chloride oversheath, graphite linings, copper wire fiber shuffling layer of cloth, partly lead
Electricity nylon tape, ultra-smooth semiconductive shielding layer includes that internal layer ultra-smooth semiconductive shielding layer and outer layer ultra-smooth are partly led
Shield layer, conductor thread core outside bag even semiconductive nylon tape, internal layer ultra-smooth semiconductive shielding layer and outer layer surpass
Smooth semiconductive shielding layer lays respectively at the medial and lateral of the crosslinked polyetylene insulated layer of ultrapurification, outer layer ultra-smooth half
The outside bag even semi-conductive buffer water-blocking band of conductive shielding layer, the outside ladle cover of semi-conductive buffer water-blocking band has copper wire
Fiber shuffling layer of cloth, copper wire fiber shuffling layer of cloth outside bag even corrugated metallic sheath, depend on outside corrugated metallic sheath
Secondary it is coated with cable asphalt layer, insulated type polrvinyl chloride oversheath, the outer surface of insulated type polrvinyl chloride oversheath
It is coated with graphite linings；Conductor thread core is round conductor stock block periphery bag even tile-type conductor stock block, and at milliken conductor
Embedding it is connected with wrinkle ply of paper between stock block；Corrugated metallic sheath be wrinkle copper sheath, wrinkle stainless steel sheath arbitrary
Kind.
The novel power cable with cross-linked polyethylene insulation of above-mentioned rated voltage 750kV, described insulated type polrvinyl chloride
The nominal thickness of oversheath is 6.0mm；Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification
Without the aperture micropore more than 0.02mm；Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification
Without the projection more than 0.05mm.
The processing technology of the novel power cable with cross-linked polyethylene insulation of rated voltage 750kV of the present invention, equipment is adopted
With dry type chemical crosslinking, vertical-type high-pressure cross-linking production line, operation is: 1. raw material apolegamy, 2. wire drawing,
3. twisted wire, 4. milliken conductor stranding, 5. inner shield, insulation, external shield insulation, 6. degassing, the most wrapped, 8.
Aluminum vertical bag welding, is 9. coated with bitumen layer+cladding oversheath+coating graphite linings, 10. product inspection, packaging, is
The product of the present invention.
The novel power cable with cross-linked polyethylene insulation product of rated voltage 750kV made by the present invention, actual
The detection voltage of test, such as following table:
Oversheath voltage test, conducts electricity at corrugated metallic sheath metallic sheath and insulated type polrvinyl chloride surface of outer sheath
Connect negative pole with corrugated metallic sheath between Ceng and apply DC voltage 25kV, last 1min, outside insulated type polrvinyl chloride
Sheath does not punctures.
When the product of the present invention uses, according to design requirement, the power cable with cross-linked polyethylene insulation novel by this
Carry out laying task.
Owing to the present invention has been designed with technique scheme, efficiently solve the insulation of existing voltage levels
The problem that power cable is not suitable with the transmission operation of rated voltage 750kV voltage levels electric power.Also through reality examination
Test with and inspection show, it has a reasonable in design, high voltage withstanding, excellent insulating property, water permeability
Get well and be suitable to the advantages such as high-drop installation, being useful as rated voltage 500kV with up to rated voltage 750kV
(Um=800kV) power cable, be also suitable as the electric power passing through rivers, lake is laid in wet environment
Cable etc..
Accompanying drawing explanation
With embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structure diagram of the embodiment of the present invention.
Fig. 2 is the embedding structure for amplifying connecting wrinkle ply of paper 12 and connecting semiconductive nylon tape 2 of conductor thread core 1 in Fig. 1
Sketch.
Accompanying drawing is respectively numbered: 1 conductor thread core；1-1 round conductor stock block；1-2 tile-type conductor stock block；2 half
Electroconductive nylon band；3 internal layer ultra-smooth semiconductive shielding layers；The 4 crosslinked polyetylene insulated layers of ultrapurification；5 outer layers surpass
Smooth semiconductive shielding layer；6 semi-conductive buffer water-blocking bands；7 copper wire fiber shuffling layer of cloths；8 wrinkle copper sheaths；
9 cable asphalt layers；10 insulated type polrvinyl chloride oversheaths；11 graphite linings；12 wrinkle ply of papers.
Detailed description of the invention
Such as accompanying drawing 1-embodiment illustrated in fig. 2, the present invention is provided with: conductor thread core 1, semiconductive nylon tape 2, interior
Layer ultra-smooth semiconductive shielding layer 3, outer layer ultra-smooth semiconductive shielding layer 5, the crosslinked polyetylene insulated layer of ultrapurification
4, semi-conductive buffer water-blocking band 6, cable asphalt layer 9, insulated type polrvinyl chloride oversheath 10, graphite linings 11,
Copper wire fiber shuffling layer of cloth 7, wrinkle copper sheath 8, conductor thread core 1 outside bag even semiconductive nylon tape 2, internal layer
Inside cladding semiconductive nylon tape 2, the external sheath ultrapurification crosslinked polyethylene of ultra-smooth semiconductive shielding layer 3
Insulating barrier 4, ultrapurification crosslinked polyetylene insulated layer 4 outside cladding outer layer ultra-smooth semiconductive shielding layer 5, outer layer
The outside bag even semi-conductive buffer water-blocking band 6 of ultra-smooth semiconductive shielding layer 5, semi-conductive buffer water-blocking band 6
Outside ladle cover has copper wire fiber shuffling layer of cloth 7, copper wire fiber shuffling layer of cloth 7 outside bag even wrinkle copper sheath 8, wrinkle
Stricture of vagina copper sheath 8 is outside is coated with cable asphalt layer 9, insulated type polrvinyl chloride oversheath 10 successively, and insulated type gathers
The outer surface of vinyl chloride oversheath 10 has graphite linings 11；The crosslinked polyetylene insulated layer of described ultrapurification be by
Ultrapurification crosslinked polyethylene (XLPE) material is made, and ultra-smooth semiconductive shielding layer is by ultra-smooth semiconductive screen
Cover material to make；The nominal thickness of described insulated type polrvinyl chloride oversheath is 6.0mm；Ultra-smooth semiconductive screen
Cover the micropore that layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are more than 0.02mm without aperture；Ultra-smooth semiconductive screen
Cover layer with the crosslinked polyetylene insulated bed boundary of ultrapurification without the projection more than 0.05mm.
Seeing accompanying drawing 2 embodiment, described conductor thread core 1 is connected with 5 tile-type for round conductor stock block 1-1 periphery bag and leads
Body stock block 1-2, and embedding between milliken conductor stock block it is connected with wrinkle ply of paper 12.
One embodiment of the novel power cable with cross-linked polyethylene insulation processing technology of rated voltage 750kV of the present invention,
The dry type that equipment uses is chemically crosslinked, vertical-type high-pressure cross-linking production line, and concrete operation is:
1., raw material apolegamy: conductor shielding and insulation shielding use ultra-smooth semiconductive shieldin material, with effectively
Guarantee to have between conductor shielding, insulation, insulation shielding good contact interface, prevent interface projection from causing electric field
Concentrate；Insulant uses super-clean cross-linkable polyethylene Insulation Material, it is desirable in every 1kg Insulation Material more than 70 μm
Impurity content is 0, tensile strength >=17.0MPa, elongation at break >=420%, specific insulation >=1.0 when 20 DEG C
×1017Ω cm, dielectric strength >=40kV；
2., wire-drawing process: after carrying out wire drawing with wire drawing machine, through after the assay was approved, wire stranding is sent in wire drawing
③；
3., wire stranding: after using five sections of frame wire twisting machines to carry out twisted wire, through after the assay was approved, twisted wire is sent into
Milliken conductor cabling procedure is 4.；
4., milliken conductor cabling procedure: twisted wire is divided into the round conductor of tile-type conductor UNICOM make cable conductor
5. heart yearn, through after the assay was approved, send into inner shield, insulation, external shield insulation operation by cable conductor heart yearn；
5., inner shield, insulation, external shield insulation operation: by cable conductor heart yearn by VCV high-voltage cross-linking polythene
After insulated wire cores unit cladding inner shield, insulating barrier, external shielding layer, through after the assay was approved, it is transported to degassing work
Sequence；
6., degassing operation: the cable after cladding external shield insulating barrier is entered gas tank and carries out degassing, close through inspection
After lattice, deliver to wrapped operation 7.；
7., wrapped operation: by waterstop winding machine carry out wrapped after, through after the assay was approved, deliver to aluminum vertical bag weldering
Connect operation 8.；
8., aluminum indulge bag welding sequence: after using argon arc welding unit to carry out aluminum vertical bag welding, through after the assay was approved,
It is transported to be coated with bitumen layer+cladding oversheath+coating graphite linings operation 9.；
9., cladding bitumen layer+cladding oversheath+coating graphite linings operation: use Ф 200 type extrusion unit advanced person's row
After cladding bitumen layer, then after being coated with oversheath+coating graphite linings, entrance product inspection, packaging process are 10.；
10., product inspection, packaging process: by the cable product of making according to design standard index requirement, carry out
After complete examination, pass the test, cable packaging machinery carry out product external packaging.
Claims (2)
1. a novel power cable with cross-linked polyethylene insulation for rated voltage 750kV, it sets
There are conductor thread core, ultra-smooth semiconductive shielding layer, the crosslinked polyetylene insulated layer of ultrapurification, partly lead
Electricity buffer water-blocking band, corrugated metallic sheath, cable asphalt layer, insulated type polrvinyl chloride oversheath,
Graphite linings, is characterized in that, is additionally provided with copper wire fiber shuffling layer of cloth, semiconductive nylon tape, ultraphotic
Sliding semiconductive shielding layer includes internal layer ultra-smooth semiconductive shielding layer and outer layer ultra-smooth semiconductive
Screen layer, conductor thread core outside bag even semiconductive nylon tape, internal layer ultra-smooth semiconductive shielding layer
Lay respectively in the crosslinked polyetylene insulated layer of ultrapurification with outer layer ultra-smooth semiconductive shielding layer,
Outside, the outside bag even semi-conductive buffer water-blocking band of outer layer ultra-smooth semiconductive shielding layer, partly lead
The outside ladle cover of electricity buffer water-blocking band has copper wire fiber shuffling layer of cloth, outside copper wire fiber shuffling layer of cloth
Portion's bag even corrugated metallic sheath, is coated with cable asphalt layer, absolutely successively outside corrugated metallic sheath
Edge type polrvinyl chloride oversheath, the outer surface of insulated type polrvinyl chloride oversheath has graphite
Layer；Conductor thread core is round conductor stock block periphery bag even tile-type conductor stock block, and at milliken conductor
Embedding it is connected with wrinkle ply of paper between stock block；Corrugated metallic sheath is wrinkle copper sheath, wrinkle rustless steel
Any one of sheath.
The novel crosslinked polyetylene insulated electricity of rated voltage 750kV the most according to claim 1
Power cable, is characterized in that, the nominal thickness of insulated type polrvinyl chloride oversheath is 6.0mm；Super
Smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are more than without aperture
The micropore of 0.02mm；Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated stratum boundary of ultrapurification
Face is without the projection more than 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697083.4A CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697083.4A CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104409165A CN104409165A (en) | 2015-03-11 |
| CN104409165B true CN104409165B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410697083.4A Expired - Fee Related CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161207A (en) * | 2015-07-08 | 2015-12-16 | 中天科技海缆有限公司 | Composite combined armored composite rosslinked polyethylene insulation steel band and steel wire fiber submarine cable |
| CN106847400A (en) * | 2017-02-16 | 2017-06-13 | 沈兴线缆集团有限公司 | Copper sheath fire prevention cable |
| CN114334293A (en) * | 2021-12-20 | 2022-04-12 | 杭州电缆股份有限公司 | High-voltage crosslinked polyethylene insulated power cable and preparation process thereof |
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| CN102280194A (en) * | 2011-05-18 | 2011-12-14 | 无锡市曙光电缆有限公司 | Cross-linked polyethylene isolated power cable of split conductor structure |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
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| CN202948774U (en) * | 2012-12-19 | 2013-05-22 | 江苏亨通高压电缆有限公司 | Highly-waterproof, corrosion-resistant, high-protection and high-tension cable |
| CN103198894A (en) * | 2012-01-04 | 2013-07-10 | 扬州曙光电缆有限公司 | 750KV ultrahigh pressure cross-linked polyethylene insulated power cable |
| CN203444851U (en) * | 2013-07-22 | 2014-02-19 | 重庆三峡电缆(集团)有限公司 | Cross-linked polyethylene insulated power cable with rated voltage 66 to 500 kV |
| CN103824632A (en) * | 2014-02-14 | 2014-05-28 | 申环电缆科技有限公司 | Intelligent extra-high-voltage photoelectric composite cable with built-in optical fiber |
| CN204257268U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | The novel power cable with cross-linked polyethylene insulation of rated voltage 750kV |
-
2014
- 2014-11-27 CN CN201410697083.4A patent/CN104409165B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280194A (en) * | 2011-05-18 | 2011-12-14 | 无锡市曙光电缆有限公司 | Cross-linked polyethylene isolated power cable of split conductor structure |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
| CN103198894A (en) * | 2012-01-04 | 2013-07-10 | 扬州曙光电缆有限公司 | 750KV ultrahigh pressure cross-linked polyethylene insulated power cable |
| CN202711741U (en) * | 2012-07-31 | 2013-01-30 | 上海上力电线电缆有限公司 | Salt lake cable |
| CN202948774U (en) * | 2012-12-19 | 2013-05-22 | 江苏亨通高压电缆有限公司 | Highly-waterproof, corrosion-resistant, high-protection and high-tension cable |
| CN203444851U (en) * | 2013-07-22 | 2014-02-19 | 重庆三峡电缆(集团)有限公司 | Cross-linked polyethylene insulated power cable with rated voltage 66 to 500 kV |
| CN103824632A (en) * | 2014-02-14 | 2014-05-28 | 申环电缆科技有限公司 | Intelligent extra-high-voltage photoelectric composite cable with built-in optical fiber |
| CN204257268U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | The novel power cable with cross-linked polyethylene insulation of rated voltage 750kV |
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| CN104409165A (en) | 2015-03-11 |
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Granted publication date: 20170111 Termination date: 20211127 |