CN211265063U - Water-resistant DC power cable - Google Patents
Water-resistant DC power cable Download PDFInfo
- Publication number
- CN211265063U CN211265063U CN202020226160.9U CN202020226160U CN211265063U CN 211265063 U CN211265063 U CN 211265063U CN 202020226160 U CN202020226160 U CN 202020226160U CN 211265063 U CN211265063 U CN 211265063U
- Authority
- CN
- China
- Prior art keywords
- water
- power cable
- polyolefin resin
- layer
- cable according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 12
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 14
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 14
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 14
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000077 silane Inorganic materials 0.000 claims abstract description 11
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000017105 transposition Effects 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- BLDFSDCBQJUWFG-UHFFFAOYSA-N 2-(methylamino)-1,2-diphenylethanol Chemical compound C=1C=CC=CC=1C(NC)C(O)C1=CC=CC=C1 BLDFSDCBQJUWFG-UHFFFAOYSA-N 0.000 claims description 3
- 229920001179 medium density polyethylene Polymers 0.000 claims description 3
- 239000004701 medium-density polyethylene Substances 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000010292 electrical insulation Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 239000011256 inorganic filler Substances 0.000 description 3
- 229910003475 inorganic filler Inorganic materials 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model discloses a water-fast type DC power cable, it forms circular cable core to twist jointly for sectorial three inner conductor and oily paper medium including the cross-section, circular cable core outside cladding has polyolefin resin inner semi-conducting layer, LDPE insulating layer, polyolefin resin outer semi-conducting layer, metallic shield layer and silane grafting crosslinked high density polyethylene oversheath in proper order, the inner conductor is the compound stranded conductor of a plurality of strands constitution and sticiss into fan-shaped structure, the strand comprises a plurality of tin-plated copper monofilament transposition, the hank of strand to with the hank of compound stranded conductor is opposite, the diameter of circular cable core is 8mm to 50mm, the LDPE insulating layer thickness is 5mm to 25 mm. The cable can effectively prevent the moisture absorption of the cable insulating layer and ensure the electrical insulation characteristic of the cable.
Description
Technical Field
The utility model relates to a power cable technical field especially relates to a water-fast type direct current power cable.
Background
High-voltage direct-current transmission has many advantages, such as low line cost, low loss, convenient power connection, easy control and the like, and is mainly applied to long-distance large-capacity transmission, power system networking, long-distance submarine cable or large-city underground cable transmission, direct-current transmission of a power distribution network and the like. The high-voltage direct-current power cable has the advantages of high insulating working electric field intensity, thin insulating thickness, small cable outer diameter, light weight, good flexibility, easy installation, small dielectric loss, low conductor loss, large current-carrying capacity, no alternating-current magnetic field and the like. At present, an inorganic filler is added into a resin insulating layer of a direct current power cable to improve the insulating property of the insulating layer, however, the inorganic filler is nano-grade micro-particles, so that the moisture absorption of the insulating layer is high, and the electrical characteristics of the cable are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, the technical problem that solve provides a water-fast type DC power cable, can effectual prevention cable insulation layer moisture absorption, guarantees the electrical insulation characteristic of cable.
The utility model discloses a make above-mentioned technical problem solve through following technical scheme.
Water-fast type direct current power cable, including the cross-section for sectorial three inner conductor and oily paper medium transposition jointly form circular cable core, circular cable core outside cladding has interior semi-conducting layer of polyolefin resin, LDPE insulating layer, polyolefin resin outer semi-conducting layer, metallic shield layer and silane grafting crosslinking high density polyethylene oversheath in proper order, the inner conductor is that a plurality of strands twist again constitutes compound stranded conductor and sticiss into fan-shaped structure, the strand comprises a plurality of tin-plated copper monofilament transposition, the hank of strand to with compound stranded conductor's hank is opposite, the diameter of circular cable core is 8mm to 50mm, the LDPE insulating layer thickness is 5mm to 25 mm.
Preferably, the polyolefin resin inner semiconductive layer and the polyolefin resin outer semiconductive layer are both LDPE, MDPE or HDPE resin semiconductive layers.
Preferably, the polyolefin resin inner semiconductive layer and the polyolefin resin outer semiconductive layer each have a thickness of 1mm to 3 mm.
Preferably, the metal shielding layer is a soft copper tape wrapping structure.
Preferably, the metal shielding layer is formed by spirally winding a tin-plated copper monofilament.
Preferably, the thickness of the metal shielding layer is 1mm to 5 mm.
Preferably, the thickness of the outer sheath of the silane grafted and crosslinked high-density polyethylene is not less than 1 mm.
Preferably, the lay length of the strand is 15 to 60 times of the outer diameter of the strand, and the lay length of the compound stranded wire is 10 to 40 times of the outer diameter of the compound stranded wire.
Preferably, the silane grafted cross-linked high density polyethylene outer sheath has a density of 0.85g/ml to 0.95 g/ml.
Preferably, the diameter of the tin-plated copper monofilament is 0.1mm to 1 mm.
The utility model has the advantages that:
1. the influence of current reduction brought by the skin effect can be effectively inhibited by replacing the original circular single conductor by the three separated fan-shaped inner conductors, and the moisture in the oil-immersed paper medium is retained in the inorganic filler such as conductive carbon black in the polyolefin resin inner semi-conductive layer to inhibit the moisture from further diffusing to the LDPE insulating layer, so that the LDPE insulating layer is effectively prevented from absorbing moisture, and the electric insulation property of the cable is greatly ensured.
2. The twisted direction of the stranded wire is opposite to that of the compound twisted wire, so that the twisting stress of the tin-plated copper monofilament forming the stranded wire can be reduced, the deformation of the monofilament is inhibited, the stability of the compound twisted wire is improved, and the excellent flexing resistance of the cable is ensured.
3. The inner conductor is that a plurality of strands twist repeatedly and form compound stranded conductor and sticis fan-shaped structure, and the strand comprises a plurality of tin-plated copper monofilament transposition, and the transposition of strand is opposite with compound stranded conductor's transposition, can reduce the torsion stress of the tin-plated copper monofilament that constitutes the strand, suppresses the monofilament deformation, improves compound stranded conductor's tensile strength and stability, has better pliability, improves the security and use nature.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
In the figure: 1-inner conductor, 2-oil-impregnated paper medium, 3-polyolefin resin inner semi-conducting layer, 4-LDPE insulating layer, 5-polyolefin resin outer semi-conducting layer, 6-metal shielding layer, 7-silane graft cross-linked high-density polyethylene outer sheath and 8-round cable core.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the water-resistant dc power cable according to the embodiment of the present invention includes a circular cable core 8 formed by twisting three inner conductors 1 having fan-shaped cross sections and an oil-impregnated paper medium 2 together. The diameter of the round cable core 8 is 8mm to 50 mm. The inner conductor 1 is formed by twisting a plurality of strands to form a compound stranded wire and tightly pressing the compound stranded wire into a fan-shaped structure, the strands are formed by twisting a plurality of tin-plated copper monofilaments, the twisting direction of the strands is opposite to that of the compound stranded wire, and specifically, the diameter of the tin-plated copper monofilaments is 0.1mm to 1 mm. Further, the lay length of the strand is 15 to 60 times of the outer diameter of the strand, and the lay length of the compound stranded wire is 10 to 40 times of the outer diameter of the compound stranded wire.
The round cable core 8 is sequentially coated with a polyolefin resin inner semi-conducting layer 3, an LDPE insulating layer 4, a polyolefin resin outer semi-conducting layer 5, a metal shielding layer 6 and a silane grafted cross-linked high-density polyethylene outer sheath 7, and the LDPE insulating layer 4 is 5-25 mm thick. For example, as the polyolefin resin inner semiconductive layer 3 and the polyolefin resin outer semiconductive layer 5, LDPE, MDPE, or HDPE resin semiconductive layers may be used, and preferably, the polyolefin resin inner semiconductive layer 3 and the polyolefin resin outer semiconductive layer 5 each have a thickness of 1mm to 3 mm. The metal shielding layer 6 can adopt a soft copper tape winding structure, and can also be formed by spirally winding a tinned copper monofilament, and preferably, the thickness of the metal shielding layer 6 is 1mm to 5 mm. The thickness of the silane grafted and crosslinked high-density polyethylene outer sheath 7 is not less than 1mm, and preferably, the density of the silane grafted and crosslinked high-density polyethylene outer sheath 7 is 0.85g/ml to 0.95 g/ml.
While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.
Claims (10)
1. Water-fast type direct current power cable, characterized by: including that the cross-section is sectorial three inner conductor (1) and oily paper medium (2) transposition jointly and forms circular cable core (8), circular cable core (8) outside cladding has in proper order polyolefin resin inner semi-conducting layer (3), LDPE insulating layer (4), polyolefin resin outer semi-conducting layer (5), metal shielding layer (6) and silane grafting cross-linking high density polyethylene oversheath (7), inner conductor (1) is that a plurality of strands twist again constitutes compound stranded conductor and sticiss into fan-shaped structure, the strand comprises a plurality of tin-plated copper monofilament transposition, the twist of strand to with compound stranded conductor's twist is opposite, the diameter of circular cable core (8) is 8mm to 50mm, LDPE insulating layer (4) thickness is 5mm to 25 mm.
2. The water-resistant type dc power cable according to claim 1, wherein: the polyolefin resin inner semi-conducting layer (3) and the polyolefin resin outer semi-conducting layer (5) are both LDPE, MDPE or HDPE resin semi-conducting layers.
3. The water-resistant type dc power cable according to claim 1, wherein: the thickness of the polyolefin resin inner semiconductive layer (3) and the thickness of the polyolefin resin outer semiconductive layer (5) are both 1mm to 3 mm.
4. The water-resistant type dc power cable according to claim 1, wherein: the metal shielding layer (6) is of a soft copper tape wrapping structure.
5. The water-resistant type dc power cable according to claim 1, wherein: the metal shielding layer (6) is formed by spirally winding a tin-plated copper monofilament.
6. The water-resistant type dc power cable according to claim 1, wherein: the thickness of the metal shielding layer (6) is 1mm to 5 mm.
7. The water-resistant type dc power cable according to claim 1, wherein: the thickness of the silane grafted cross-linked high-density polyethylene outer sheath (7) is not less than 1 mm.
8. The water-resistant type dc power cable according to claim 1, wherein: the lay length of the strand is 15 to 60 times of the outer diameter of the strand, and the lay length of the compound stranded wire is 10 to 40 times of the outer diameter of the compound stranded wire.
9. The water-resistant type dc power cable according to claim 1, wherein: the density of the silane grafted and crosslinked high-density polyethylene outer sheath (7) is 0.85g/ml to 0.95 g/ml.
10. The water-resistant type dc power cable according to claim 1, wherein: the diameter of the tin-plated copper monofilament is 0.1mm to 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226160.9U CN211265063U (en) | 2020-02-28 | 2020-02-28 | Water-resistant DC power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226160.9U CN211265063U (en) | 2020-02-28 | 2020-02-28 | Water-resistant DC power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211265063U true CN211265063U (en) | 2020-08-14 |
Family
ID=71991233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020226160.9U Expired - Fee Related CN211265063U (en) | 2020-02-28 | 2020-02-28 | Water-resistant DC power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211265063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420249A (en) * | 2020-11-03 | 2021-02-26 | 安徽电缆股份有限公司 | Novel electrified railway cable and manufacturing process thereof |
-
2020
- 2020-02-28 CN CN202020226160.9U patent/CN211265063U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420249A (en) * | 2020-11-03 | 2021-02-26 | 安徽电缆股份有限公司 | Novel electrified railway cable and manufacturing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211265063U (en) | Water-resistant DC power cable | |
| CN213844790U (en) | Ultra-light anti-interference multi-core shielding control cable | |
| CN211181694U (en) | Hybrid transmission submarine cable of alternating current-direct current system | |
| CN211980236U (en) | Environment-friendly insulation type power cable | |
| RU164397U1 (en) | THREE-WAY POWER CABLE WITH INTEGRATED POLYETHYLENE | |
| CN211208084U (en) | High-flexibility mobile flexible structure data cable | |
| CN213277585U (en) | High tensile shielding function data communication bus | |
| CN201838377U (en) | Electric power flexible cable for wrapping lining-layer ship | |
| CN216487434U (en) | Medium-voltage high-strength multiple waterproof cable for urban rail transit | |
| CN211265095U (en) | Direct current oil-immersed paper insulated cable | |
| CN214956123U (en) | Medium-voltage waterproof power cable | |
| CN217181893U (en) | Multifunctional composite cable | |
| CN217690544U (en) | 35KV high-reliability graphene shielded power cable | |
| CN219553260U (en) | Torsion-resistant cable | |
| CN211604784U (en) | Aluminum alloy variable frequency cable | |
| CN212161318U (en) | Electrical connection anti-interference multi-core cable of photovoltaic power generation system | |
| CN217113876U (en) | 27.5kV electrified railway is with nai cable of turning round | |
| CN216597107U (en) | Anti-interference low-attenuation communication cable | |
| CN211455336U (en) | Soft low-temperature-resistant multi-core cable | |
| CN211294725U (en) | Single-core shielding power cable for rolling stock | |
| CN214897801U (en) | Integrated multifunctional comprehensive cable for field detection | |
| CN212724810U (en) | Spiral wound high-characteristic impedance high-voltage cable | |
| CN217086179U (en) | Core-breaking-preventing type small-diameter multi-core shielded cable | |
| CN210073353U (en) | Crosslinked polyethylene insulation halogen-free low-smoke flame-retardant cable | |
| CN212365590U (en) | Coaxial flexible power cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200814 |