CN104200893A - Overhead transmission line - Google Patents
Overhead transmission line Download PDFInfo
- Publication number
- CN104200893A CN104200893A CN201410488097.5A CN201410488097A CN104200893A CN 104200893 A CN104200893 A CN 104200893A CN 201410488097 A CN201410488097 A CN 201410488097A CN 104200893 A CN104200893 A CN 104200893A
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- transmission line
- conductive layer
- power transmission
- wire
- metal wire
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 5
- 239000004020 conductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000002500 effect on skin Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides an overhead transmission line comprising at least one non-conductive wire core coated by at least one conductive layer. The conductive layer is composed of one continuous winded metal wire to form a tension spring, and the turns of the spring are pressed tightly; the metal wire has the cross sections changing periodically and continuously along the extending direction of the metal wire; preferably, the cross sections changing periodically and continuously are characterized in that the upper and lower edges of an optional longitudinal section of the metal wire are sine curves symmetrical about the axis of the metal wire. The overhead transmission line has the advantages that the surface of the transmission line is prevented from snow and ice in cold weather to the great extent, the gravity of the transmission line can be remained low, and the possibility of the transmission line breaking in the extreme weather can be reduced significantly.
Description
Technical field
The present invention relates to electric power facility field, especially, relate to a kind of high-altitude power transmission line.
Background technology
High-altitude power transmission line is to realize the basic electric power facility that remote power is carried; In transmission of electricity process, need to stand the weather test in district variously, as, the mountain area that some are cold, the residing high-altitude of power transmission line has extremely cold temperature, and often meet with rainwater weather, now, power transmission line surface is very easy to accumulated snow and freezes, and causes power transmission line weight to be increased sharply, through wind one, blow, power transmission line very likely ruptures and drops again.Current high-altitude power transmission line is formed by steel wire core strand system, is substantially all faced with this problem, causes very large trouble to power construction department.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of high-altitude power transmission line, this high-altitude power transmission line can be avoided to a great extent under severe cold weather, the accumulated snow on power transmission line surface or accumulated ice, make the deadweight of power transmission line remain reduced levels, thereby significantly reduce the possibility that it ruptures under extreme weather.
The technical solution adopted for the present invention to solve the technical problems is: this high-altitude power transmission line comprises at least one non-conductive core; This non-conductive core outer wrap is one deck conductive layer at least; Described conductive layer is formed by a continuous wire coiling, forms an extension spring, and each circle of described extension spring relies closely; The direction that described wire extends along wire itself, has and is periodically continually varying cross section.
As preferably, described continually varying cross section has following feature: the sideline of twice up and down of described any one vertical section wiry is the sine curve about wire axis symmetry.
As preferably, described conductive layer has 1～3 layer; Further, between each layer of described conductive layer, be provided with insulating barrier, thereby suppress the skin effect of alternating current, make each conductive layer all can participate in efficient current-carrying.
As preferably, described non-conductive core has elasticity, and is stretching and keeping under the state of suitable internal stress, at conductive layer described in its surperficial coiling; Thereby make power line under normal condition, the resilience pulling force by non-conductive core between each circle of conductive layer is mutual to compressing.
Beneficial effect of the present invention is: this high-altitude power transmission line is operated in normal climate lower time, between each circle wire of described conductive layer, rely closely, make conductive layer form a tubular electric conductor, electric current is mobile along the direction of electric wire extension from the tube wall of this tubular electric conductor, and conductive layer has minimum resistance, and when meeting with extremely cold weather, the a large amount of accumulated snow in electric wire surface, during accumulated ice, because conductive layer consists of cross sectional dimensions continually varying wire, therefore, on electric wire, in plated space, be full of hole, ponding infiltrates after these holes, by freezing and expansion, thereby each circle wire of conductive layer is strutted, each circle wire is no longer abutted against together, this makes the current path on conductive layer that huge variation occur, from original along the mobile state of electric wire bearing of trend, become the state moving ahead around wire rotating, make the path of electric current extend hundreds of times, thereby make the resistance of whole power transmission line suddenly increase hundreds of times, pressure drop on power transmission line is improved suddenly, the conductive layer heating that heats up rapidly, thereby by the accumulated snow on power transmission line, accumulated ice melts, make power transmission line avoid accumulated snow, accumulated ice breaks.
Accompanying drawing explanation
Fig. 1 is the side schematic view of an embodiment of this high-altitude power transmission line.
Fig. 2 is that the end of Fig. 1 embodiment is to schematic diagram.
Fig. 3 forms the schematic diagram wiry of conductive layer in this high-altitude power transmission line.
Fig. 4 is the electric current of conductive layer surface in this high-altitude power transmission line path comparison diagram under two states.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
In the embodiment shown in Fig. 1, Fig. 2, this high-altitude power transmission line comprises a non-conductive core 1; This non-conductive core 1 outer wrap has two conductive layers 21,22; Described conductive layer 21,22 is formed by a continuous wire coiling, forms an extension spring, and each circle of described extension spring relies closely.
As shown in Figure 3, the direction that described wire 200 extends along wire itself, has and is periodically continually varying cross section; Described continually varying cross section has following feature: the sideline of twice up and down of any one vertical section of described wire 200 is the sine curve about wire axis symmetry, be in Fig. 3, about straight line L, the sideline of twice up and down of wire 200 vertical sections is symmetrical sine curve.
Above-mentioned high-altitude power transmission line, described non-conductive core 1 has elasticity, and is stretching and keeping under the state of suitable internal stress, at conductive layer 21,22 described in its surperficial coiling; Thereby make power line under normal condition, the resilience pulling force by non-conductive core 1 between each circle of conductive layer 21,22 is mutual to compressing.For described suitable internal stress, should determine as follows, suppose when described high-altitude power transmission line normally sets up, the pulling force along power transmission line bearing of trend being caused by the gravity of power transmission line self is T; Described suitable internal stress is 1.5T～2T.
As, when power transmission line normally hangs, with mean obliquity φ=5 ° that horizontal plane forms, power transmission line deadweight is 2G, according to Mechanics Vector analysis, the pulling force in power transmission line is about T=G/tan5 °.
Described suitable internal stress has the upper limit, and reason that should not be excessive is: if internal stress is excessive, infiltrate water body in power transmission line due to the excessive freezing and expansion that is difficult to of the pressure being subject to; Described internal stress specifically gets how many, and the degree of tightness situation of the power transmission line setting up according to plan determines, according to described declination angle, determines.
In addition, can also between each layer of described conductive layer 21,22, insulating barrier be set, make radially directly conducting between each layer of conductive layer 21,22; Thereby make each conductive layer all can participate in independently efficient current-carrying, suppress alternating current and only on outer conductive layer, transmit due to skin effect.
Above-mentioned high-altitude power transmission line is operated in normal climate lower time, between each circle wire of described conductive layer 21,22, rely closely, make conductive layer form a tubular electric conductor, electric current is mobile along the direction of electric wire extension from the tube wall of this tubular electric conductor, as left part in Fig. 4 is illustrated, electric current is a circle 212 from last circle 211 flow to, and path is as shown in the arrow of two turn-to-turns, very short, and electric current is very large by area, close to circle axial projective area wiry, therefore, resistance is very little, suppose each circle diameter wiry, that is the nominal diameter of described tubular electric conductor is D, and cross-sectional diameter wiry is d, circle axial projective area S=wiry π Dd, two circles real contact area wiry, be that electric current is guarded and is assumed to be π Dd/3 by area, then the resistivity of establishing wire 200 is ρ, the suffered resistance M1=ρ d/(π Dd/2 of electric current circle 212 from last circle 211 flow to)=3 ρ/π D, M1 is less for this resistance, and when meeting with extremely cold weather, the a large amount of accumulated snow in electric wire surface, during accumulated ice, because conductive layer consists of cross sectional dimensions continually varying wire 200, therefore, on electric wire, in plated space, be full of hole, ponding infiltrates after these holes, by freezing and expansion, thereby each circle wire of conductive layer is strutted, each circle wire is no longer abutted against together, this makes the current path on conductive layer that huge variation occur, from original along the mobile state of electric wire bearing of trend, become the state moving ahead around wire rotating, as shown in right side part in Fig. 4, anticipate, electric current can only detour as shown in curve arrow, now, the cross-sectional area of wire 200 is π d
2/ 4, each circle girth wiry is π D, the resistance M2=ρ π D/(π d that electric current circle from last circle flow to is suffered
2/ 4)=4 ρ D/ d
2, thus, M1/M2=(3 ρ/π D)/(4 ρ D/ d
2)=3 d
2/ π D
2≈ d
2/ D
2, usually, the diameter d of wire 200 is got 0.8mm left and right, can obtain thinner, and each circle nominal diameter D wiry is also the diameter of conductive layer, according to the rugosity of current high-voltage line, desirable 16mm left and right, M1/M2 ≈ 1/400,
As can be seen here, on power transmission line, when accumulated ice or accumulated snow, the resistance of power transmission line has increased hundreds of times suddenly, pressure drop on power transmission line is improved suddenly, the conductive layer heating that heats up rapidly, thus the accumulated snow on power transmission line, accumulated ice are melted, make power transmission line avoid accumulated snow, accumulated ice breaks.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a high-altitude power transmission line, comprises at least one non-conductive core (1); This non-conductive core outer wrap is one deck conductive layer (21,22) at least; Described conductive layer is formed by a continuous wire (200) coiling, forms an extension spring, and each circle of described extension spring relies closely; The direction that described wire (200) extends along wire itself, has and is periodically continually varying cross section.
2. high-altitude according to claim 1 power transmission line, is characterized in that: described continually varying cross section has following feature: the sideline of twice up and down of any one vertical section of described wire (200) is the sine curve about wire axis symmetry.
3. high-altitude according to claim 1 and 2 power transmission line, is characterized in that: described conductive layer has 1～3 layer.
4. high-altitude according to claim 3 power transmission line, is characterized in that: between each layer of described conductive layer, be provided with insulating barrier.
5. high-altitude according to claim 1 and 2 power transmission line, is characterized in that: described non-conductive core (1) has elasticity, and is stretching and keeping under the state of suitable internal stress, at conductive layer described in its surperficial coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488097.5A CN104200893B (en) | 2014-09-23 | 2014-09-23 | High-altitude power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488097.5A CN104200893B (en) | 2014-09-23 | 2014-09-23 | High-altitude power transmission line |
Publications (2)
| Publication Number | Publication Date |
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| CN104200893A true CN104200893A (en) | 2014-12-10 |
| CN104200893B CN104200893B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410488097.5A Active CN104200893B (en) | 2014-09-23 | 2014-09-23 | High-altitude power transmission line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928818A (en) * | 2020-09-09 | 2020-11-13 | 四川长园工程勘察设计有限公司 | Distribution line section diagram generation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195126A (en) * | 1995-01-18 | 1996-07-30 | Mitsui Eng & Shipbuild Co Ltd | Ice/snow sticking prevention type power transmission line |
| JP2001118434A (en) * | 1999-08-09 | 2001-04-27 | Furukawa Electric Co Ltd:The | Low wind-pressure insulation electric wire |
| CN201408563Y (en) * | 2009-02-26 | 2010-02-17 | 江苏通光强能输电线科技有限公司 | Ice and snow proofing overhead conductor |
| CN101702332A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Ice-coating-proof power conducting wire |
| CN202487268U (en) * | 2012-04-08 | 2012-10-10 | 河南科信电缆有限公司 | Composite carbon fiber cable |
-
2014
- 2014-09-23 CN CN201410488097.5A patent/CN104200893B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195126A (en) * | 1995-01-18 | 1996-07-30 | Mitsui Eng & Shipbuild Co Ltd | Ice/snow sticking prevention type power transmission line |
| JP2001118434A (en) * | 1999-08-09 | 2001-04-27 | Furukawa Electric Co Ltd:The | Low wind-pressure insulation electric wire |
| CN201408563Y (en) * | 2009-02-26 | 2010-02-17 | 江苏通光强能输电线科技有限公司 | Ice and snow proofing overhead conductor |
| CN101702332A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Ice-coating-proof power conducting wire |
| CN202487268U (en) * | 2012-04-08 | 2012-10-10 | 河南科信电缆有限公司 | Composite carbon fiber cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928818A (en) * | 2020-09-09 | 2020-11-13 | 四川长园工程勘察设计有限公司 | Distribution line section diagram generation method |
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| Publication number | Publication date |
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| CN104200893B (en) | 2016-09-21 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Fuchang Inventor after: Zhang Longjiang Inventor after: Zhang Guodong Inventor after: Jingfuqing Inventor after: Du Juan Inventor after: Pan Xingbin Inventor after: Zhao Yunpeng Inventor after: Liang Kang Inventor after: Xin Yuejuan Inventor after: Zhang Hongliang Inventor after: Feng Chao Inventor after: Wei Fachang Inventor after: Li Fenge Inventor after: Sun Yuying Inventor after: Zou Baozhen Inventor after: Zhang Weidong Inventor after: Feng Yaozhong Inventor after: Liu Jiayun Inventor after: Xu Qing Inventor after: Cao Guodong Inventor after: Zou Haitao Inventor after: Lu Peng Inventor after: Sha Xianguang Inventor after: Song Qingfang Inventor after: Gu Lingjie Inventor before: Ma Genchang |
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Effective date of registration: 20160825 Address after: 252500 Guanxian city of Liaocheng province Shandong Yichun crown Road South 160309 hills Building 1 (spring) Applicant after: GUANXIAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER COMPANY Address before: Wuzhong City Building No. 388 Suzhou City, Wuzhong District province Jiangsu Soochow road 2107 room 215100 Applicant before: Ma Genchang |
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Effective date of registration: 20180416 Address after: 226500 Rugao City, Nantong, Jiangsu, No. 268, Fu Shou Road, town. Patentee after: JIANGSU QIYING WIRE CABLE CO.,LTD. Address before: 252500 Guanxian city of Liaocheng province Shandong Yichun crown Road South 160309 hills Building 1 (spring) Patentee before: GUANXIAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER COMPANY |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Overhead transmission line Effective date of registration: 20220704 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2022980009746 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230627 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2022980009746 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: High altitude transmission line Effective date of registration: 20230703 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2023980046468 |