CN109786022A - A kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely - Google Patents
A kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely Download PDFInfo
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- CN109786022A CN109786022A CN201910226695.8A CN201910226695A CN109786022A CN 109786022 A CN109786022 A CN 109786022A CN 201910226695 A CN201910226695 A CN 201910226695A CN 109786022 A CN109786022 A CN 109786022A
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- layer
- sheath
- cable
- environmentally friendly
- restrictive coating
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000004020 conductor Substances 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 239000004411 aluminium Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 17
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000004132 cross linking Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 229920002397 thermoplastic olefin Polymers 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000004078 waterproofing Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 229910001369 Brass Inorganic materials 0.000 abstract description 4
- 239000010951 brass Substances 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 235000009854 Cucurbita moschata Nutrition 0.000 description 1
- 240000001980 Cucurbita pepo Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 235000020354 squash Nutrition 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
The present invention is that a kind of 220kV-750kV high drop environmentally friendly crosslinked cable that blocks water entirely using zigzag restrictive coating increases the frictional property of restrictive coating；Metal sheath layer uses smooth aluminium sheath, increases the tightness degree between aluminium sheath and sheath, to play the role of antiskid when the construction of high drop.Using the radial water-resisting of water-blocking conductor (round compacted comductor or milliken conductor) and semi-conductive layer longitudinal water-blocking and aluminium sheath, PE sheath, the full block-water performance of cable is realized.In order to which the short circuit current for making up plane aluminium sheath is insufficient, increases brass wire shielding structure, improve the short circuit current of cable.Increase by 4 optical cables in copper wires of cable shielding construction and be evenly distributed, realizes the intelligence of cable.Non metallic sheath enhances block-water performance using high density polyethylene (HDPE), extrudes semiconductive external electrode and realizes the cleaning of high-tension cable, the feature of environmental protection；The present invention has slip resistance good, and installation is convenient, and block-water performance and good environmental protection are applicable in high drop construction line.
Description
Technical field
The invention patent relates to field of cable technology, in particular to a kind of 220kV-750kV high drop block water full environmental protection hand over
Join cable.
Background technique
With domestic and international ultra-high voltage cross-linking polyethylene-insulated power cable (hereinafter referred to as crosslinked cable) demand gradually
Increase, construction environment requires cable quality higher and higher.But ultra-high voltage cross-linking polyethylene-insulated power cable line footpath is thick, weight
Greatly, under high drop construction environment, sliding is easy to produce between sheath itself, sheath and aluminium sheath, influence cable uses the longevity
Life.Insulation ag(e)ing degree is reduced insulation to also influence its service life by tree discharge, the i.e. influence of water tree and electricity tree
Moisture content is to improve one of the method for power cable with cross-linked polyethylene insulation service life, in particular with mentioning for voltage class
Height, cable block-water performance are also just more and more important.In addition, intelligent product is more aobvious as country three changes the fast development of construction
Must be particularly important, meanwhile, the attention with country to environmental protection, the feature of environmental protection of cable product also receives the great attention of user.
Currently, international, the domestic environmentally friendly ultra-high voltage cross-linking polyethylene power cable product that blocks water entirely suitable for high drop not yet.
Summary of the invention
In order to solve the above-mentioned technical problem, the present invention is that a kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely,
Its technical solution are as follows:
Be followed successively by from inside to outside including conductor (2), outside the conductor semi-conductive layer (3), conductor shield (4), insulating layer (5),
Insulation screen (6), semi-conductive buffer layer (7), shielding layer of copper wires (8), two-sided semiconductor waterstop (10), metal sheath layer
(11) and restrictive coating (12), which is characterized in that the conductor (2) is milliken conductor or round compacted comductor, the copper wire screen
It covers and is evenly distributed several optical cables (9) in layer (8), the metal sheath layer (11) uses smooth aluminium sheath, the restrictive coating (12)
For non metallic sheath layer and semiconductive jacket layer is extruded, black high density polyethylene (HDPE) protective cover material and thermoplastic polyolefin is respectively adopted
Zigzag sheath is made in semiconductive shieldin material.
Further, it pads between every layer of monofilament of conductor (2) and is process every waterstop, the intermediate addition of the milliken conductor
Waterproofing rope (1), cross section use tile-type segmenting structure or fan-segmentation structure, and the cross section of the round compacted comductor is adopted
With pressing circular configuration.
Further, the semi-conductive layer (3) uses semiconductive nylon tape.
Further, the conductor shield (4) and insulation screen (6) are all made of the shielding of ultra-smooth semiconductive polyolefin
Material.
Further, the insulating layer (5) using ultrapurification ultra-high voltage cross-linking insulating material of polyethylene or uses ultrapurification
Insulating material of polyethylene.
Further, the semi-conductive buffer layer (7) is blocked water using the single side semi-conductive buffer that 4 thickness degree are respectively 2mm
Band.
Further, the shielding layer of copper wires (8) is shielded using the copper wire of diameter 1.8mm, in shielding layer of copper wires (8)
4 optical cables (9) are evenly distributed, the diameter of optical cable (9) is less than the diameter of copper wire.
Further, the metal sheath layer (11) uses the smooth aluminium sheath of thickness 1.5-2.0mm, the restrictive coating
(12) zigzag high density polyethylene (HDPE) and thermoplastic polyolefin semi-conductive screen protective cover material are used, is extruded into section as zigzag shield
Jacket layer.
Further, the zigzag restrictive coating is parallel sawtooth shape restrictive coating or spiral saw dentation restrictive coating.
The present invention is that a kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely, compared with prior art, first is that adopting
With zigzag restrictive coating, increase the frictional property of restrictive coating；Second is that metal sheath layer uses smooth aluminium sheath, so that aluminium sheath and shield
Tightness degree between set increases, to play the role of antiskid when the construction of high drop.Meanwhile it using water-blocking conductor and partly leading
The radial water-resisting of electric layer longitudinal water-blocking and aluminium sheath, PE sheath, the final full block-water performance for realizing cable.In order to make up plane aluminium
The short circuit current of sheath is insufficient, increases brass wire shielding structure, improves the short circuit current of cable.In addition, for the intelligence for realizing cable
Change, increase by 4 optical cables in copper wires of cable shielding construction, and be evenly distributed, cable outer diameter outline is less than copper wire outer diameter, to cable
Product operating condition carries out real-time monitoring.Non metallic sheath uses high density polyethylene (HDPE), further enhances block-water performance, passes through
Semiconductive external electrode is extruded, cleaning, the feature of environmental protection of high-tension cable are realized, the present invention has preferable slip resistance energy, installation
It is easy for construction, it blocks water and good environmental protection.
Detailed description of the invention
The overall structure diagram that Fig. 1 is the present invention when being milliken conductor；
The overall structure diagram that Fig. 2 is the present invention when being round compacted comductor；
Fig. 3 is parallel sawtooth shape sheath schematic diagram of a layer structure of the present invention；
Fig. 4 is spiral saw dentation restrictive coating structural schematic diagram of the present invention；
Fig. 5 is zigzag sheath die sleeve schematic diagram of the present invention；
Fig. 6 is Fig. 5 side sectional view；
As shown, 1 waterproofing rope, 2 conductors, 3 semi-conductive layers, 4 conductor shields, 5 insulating layers, 6 insulation screens, 7 semiconductives
Buffer layer, 8 shielding layer of copper wires, 9 optical cables, 10 two-sided semiconductor waterstops, 11 metal sheath layers, 12 restrictive coatings, 3 die sleeves, 14 hold
Diameter.
Specific embodiment
As shown in Figure 1, the present invention is that a kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely, layer from the inside to the outside
1 waterproofing rope is successively respectively included, 2 conductors, 3 semiconductive nylon tapes, 4 conductor shields, 5 insulating layers, 6 insulation screens, 7 half lead
Electric buffer layer, 8 shielding layer of copper wires, 9 optical cables, 10 two-sided semiconductor waterstops, 11 metal sheath layers, 12 restrictive coatings.
As shown in Fig. 2, layer successively respectively includes 2 conductors, 3 semiconductive nylon tapes, 4 conductor shieldings to the present invention from the inside to the outside
Layer, 5 insulating layers, 6 insulation screens, 7 semi-conductive buffer layers, 8 shielding layer of copper wires, 9 optical cables, 10 two-sided semiconductor waterstops, 11
Metal sheath layer, 12 restrictive coatings.
Conductor 2 is milliken conductor or round compacted comductor, and Fig. 1 uses milliken conductor, and Fig. 2 uses round compacted comductor.
In order to reduce kelvin effect of the conductor when transmitting high current load, the conductor 800mm2-3500mm2Specification, which preferentially uses, divides
Cut copper conductor or segmentation aluminium conductor, 240mm2-800mm2Specification is twisted using more single lines presses circular copper conductors or presses
Round aluminium conductor；Wherein 800mm2Specification may be either that round compacted comductor can also be milliken conductor.
In order to enhance the stability of conductor structure, wrapped semiconductive nylon tape is provided with outside conductor 2.
The conductor shield 4, insulation screen 6 are using the shielding material manufacture of ultra-smooth semiconductive polyolefin.
The insulating layer 5 preferentially uses ultrapurification ultra-high voltage cross-linking insulating material of polyethylene, and ultrapurification polyethylene can also be used
Insulation Material is made.
Conductor shield 4, insulating layer 5, insulation screen 6 once squeeze out system using the vertical production line of three-layer co-extruded dry type
Make completion.
It is respectively the single side semi-conductive buffer water-blocking band of 2mm that semi-conductive buffer layer 7, which uses 4 thickness degree, and it is wrapped to carry out gap.
In Fig. 1, for the block-water performance for improving cable, 2 central filler of conductor waterproofing rope 1, monofilament are twisted into every when conductor
Wrapped waterstop is process water-blocking conductor between layer single line；By semi-conductive buffer layer 7, outer layer has 8 internal layer of shielding layer of copper wires
Two-sided semi-conductive buffer water-blocking band 10, semi-conductive buffer layer 7 are made of single side semi-conductive buffer water-blocking band, to realize absolutely
Blocking water between edge shielded layer 6 and metal sheath layer 11；Full block-water performance is realized by above structure, increases high-tension cable
Service life.
When cable longitudinally meets water, among conductor, between conductor monofilament, the outer semi-conductive buffer layer of core, brass wire shielding extrernal resistance
Water band structure will water-swellable, prevent the entrance of outside moisture, play the effect of radial water-resisting.
The restrictive coating 12 is non metallic sheath layer and extrudes semiconductive jacket layer, using the black with high shrinkage performance
Zigzag sheath is made in high density polyethylene (HDPE) protective cover material and thermoplastic polyolefin shield sheath material, so that protective metal shell and nonmetallic
Sheath close adhesion prevents to slide.Zigzag surface of outer sheath simultaneously, so that frictional force increases, convenient for the peace of high drop
Dress construction.As shown in figure 4, the restrictive coating of spiral saw dentation: it is either aerial or buried, will not ponding, apply in aerial electricity
Cable, distinguished and admirable air-flow can leak out along spiral line passage when passing through, and be not easy dust accumulation, and opposite windage is small.
Since 220kV-750kV ultra-high voltage cross-linking polyethylene power cable has the loss of metal sheath layer and capacity of short circuit
Higher requirement has higher requirement to the compactness of metal sheath layer and non metallic sheath layer, and the metal sheath layer 11 is excellent
The smooth aluminium sheath with a thickness of 1.5-2.0mm is first made by welding using plane aluminium strip, it can also be using the plane aluminium extruded
Sheath so that the tightness degree between aluminium sheath and sheath increases, while uniformly coating one layer of hot melt in metallic aluminium jacket surface
Glue prevents from generating sliding between protective metal shell and non metallic sheath as erosion resistant coating, thus antiskid when playing the construction of high drop
Effect.
The metal sheath layer 11 and restrictive coating 12, when cable radially meets water, metal sheath layer 11 passes through aluminium atom
Dense arrangement structure plays the role of radial water-resisting；Restrictive coating 12 plays radial water-resisting by the nonpolar action of polyethylene molecule
Effect.
Since 220kV-750kV ultra-high voltage cross-linking polyethylene power cable has the loss of metal sheath layer and capacity of short circuit
Higher requirement, the shielding layer of copper wires 8 are shielded using diameter 1.5mm-2.5mm copper wire, mainly make up plane aluminium shield
The deficiency for covering short circuit current, improves the short circuit current of cable.Meanwhile shielding layer of copper wires circumferencial direction is uniformly distributed 4 optical cables, light
The diameter of cable is slightly less than the diameter of copper wire.
The restrictive coating 12 is using the black high density polyethylene (HDPE) protective cover material and thermoplastic polyolefin with high shrinkage performance
It is zigzag sheath that section, which is made, in shield sheath material.Zigzag restrictive coating be parallel sawtooth shape restrictive coating (as shown in Figure 3) or
Spiral saw dentation restrictive coating (as shown in Figure 4).The metal sheath layer and non metallic sheath layer be same procedure process and
At so as to avoid the deformation of smooth aluminium sheath and fold.So that protective metal shell and non metallic sheath close adhesion, prevent to slide
It moves.Zigzag surface of outer sheath, so that frictional force increases, convenient for the installation of high drop.Meanwhile semi-conductive layer is used and is extruded
Thermoplastic polyolefin semi-conductive screen protective cover material is made, and realizes cleaning, the environmental-protecting performance of cable.
The zigzag restrictive coating 12 is produced, in wire and cable by traction device using Fig. 5, die sleeve shown in fig. 6 13
Die sleeve used in production is divided into three kinds of forms, i.e. squash type, half squeezes tubular type and crowded tubular type, and the die sleeve that the present invention uses is half crowded
Tubular type, for producing the oversheath of cable, the die sleeve are as follows: mold core has tubulose to hold path portion, and mold core holds the end face retraction die sleeve of diameter
Mouthful end face, the die sleeve mouth end face are parallel sawtooth shape, the advantages of using the die sleeve: mold core inner hole can suitably increase, to work as
When core outer diameter is larger, will not occur scratching, block；Also it can prevent from becoming smaller because of core outer diameter, in mold core caused by swing
It is eccentric；There is certain pressure, be compacted plastic layer, the gap of core can be filled, therefore is usually used in inner sheath and requires to be tightly combined
Oversheath squeeze out in.The zigzag restrictive coating is parallel sawtooth, and die sleeve holds diameter 14 using laciniation, realizes that sheath is flat
The production of row zigzag.
For the intelligence for realizing cable, increase by 4 optical cables in copper wires of cable shielding construction, and be evenly distributed, outside optical cable
Diameter outline is less than copper wire outer diameter, carries out real-time monitoring to cable product operating condition, realizes the intelligence of cable.
The present invention is that a kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely, first is that using zigzag restrictive coating,
Increase the frictional property of restrictive coating；Second is that metal sheath layer uses smooth aluminium sheath, so that the close journey between aluminium sheath and sheath
Degree increases, to play the role of antiskid when the construction of high drop.Meanwhile using water-blocking conductor and semi-conductive layer longitudinal water-blocking and
The radial water-resisting of aluminium sheath, PE sheath, the final full block-water performance for realizing cable.In order to make up the short circuit current of plane aluminium sheath
Deficiency increases brass wire shielding structure, improves the short circuit current of cable.In addition, for the intelligence for realizing cable, in copper wires of cable screen
Increase by 4 optical cables in shield structure, and be evenly distributed, cable outer diameter outline is less than copper wire outer diameter, to cable product operating condition into
Row real-time monitoring realizes the intelligence of cable.Non metallic sheath uses high density polyethylene (HDPE), further enhances block-water performance,
By extruding semiconductive external electrode, cleaning, the feature of environmental protection of high-tension cable are realized, the present invention has preferable slip resistance good,
Installation is convenient, full block-water performance and good environmental protection, especially suitable for high drop construction line.
The above is to the preferred embodiment of the present invention, it should be noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement and increase can also be made, these improve and increase and also regard
For to protection of the invention.
Claims (9)
- The environmentally friendly crosslinked cable 1. a kind of 220kV-750kV high drop blocks water entirely, including conductor (2), outside the conductor from inside to outside It is followed successively by semi-conductive layer (3), conductor shield (4), insulating layer (5), insulation screen (6), semi-conductive buffer layer (7), copper wire Shielded layer (8), two-sided semiconductor waterstop (10), metal sheath layer (11) and restrictive coating (12), which is characterized in that the conductor (2) it is milliken conductor or round compacted comductor, is evenly distributed several optical cables (9), the metal in the shielding layer of copper wires (8) Restrictive coating (11) uses smooth aluminium sheath, and the restrictive coating (12) is non metallic sheath layer and extrudes semiconductive jacket layer, respectively Zigzag sheath is made using black high density polyethylene (HDPE) protective cover material and thermoplastic polyolefin semiconductive shieldin material.
- The environmentally friendly crosslinked cable 2. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that lead It pads between every layer of monofilament of body (2) and is process every waterstop, the intermediate of the milliken conductor adds waterproofing rope (1), cross section Using tile-type segmenting structure or fan-segmentation structure, the cross section of the round compacted comductor, which uses, presses circular configuration.
- The environmentally friendly crosslinked cable 3. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute Semi-conductive layer (3) are stated using semiconductive nylon tape.
- The environmentally friendly crosslinked cable 4. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute It states conductor shield (4) and insulation screen (6) is all made of ultra-smooth semiconductive polyolefin shielding material.
- The environmentally friendly crosslinked cable 5. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute Insulating layer (5) are stated using ultrapurification ultra-high voltage cross-linking insulating material of polyethylene or use ultrapurification insulating material of polyethylene.
- The environmentally friendly crosslinked cable 6. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute Stating semi-conductive buffer layer (7) and using 4 thickness degree is respectively the single side semi-conductive buffer water-blocking band of 2mm.
- The environmentally friendly crosslinked cable 7. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute It states shielding layer of copper wires (8) to be shielded using the copper wire of diameter 1.8mm, is evenly distributed 4 optical cables (9) in shielding layer of copper wires (8), The diameter of optical cable (9) is less than the diameter of copper wire.
- The environmentally friendly crosslinked cable 8. a kind of 220kV-750kV high drop as described in claim 1 blocks water entirely, which is characterized in that institute The smooth aluminium sheath that metal sheath layer (11) use thickness 1.5-2.0mm is stated, the restrictive coating (12) uses zigzag high density Polyethylene and thermoplastic polyolefin semi-conductive screen protective cover material, being extruded into section is zigzag restrictive coating.
- The environmentally friendly crosslinked cable 9. a kind of 220kV-750kV high drop as claimed in claim 8 blocks water entirely, which is characterized in that institute Stating zigzag restrictive coating is parallel sawtooth shape restrictive coating or spiral saw dentation restrictive coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226695.8A CN109786022A (en) | 2019-03-25 | 2019-03-25 | A kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226695.8A CN109786022A (en) | 2019-03-25 | 2019-03-25 | A kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109786022A true CN109786022A (en) | 2019-05-21 |
Family
ID=66490299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910226695.8A Pending CN109786022A (en) | 2019-03-25 | 2019-03-25 | A kind of 220kV-750kV high drop blocks water environmentally friendly crosslinked cable entirely |
Country Status (1)
| Country | Link |
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| CN (1) | CN109786022A (en) |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190521 |
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| RJ01 | Rejection of invention patent application after publication |