CN110391631A - A kind of method reducing conducting wire sag variation - Google Patents
A kind of method reducing conducting wire sag variation Download PDFInfo
- Publication number
- CN110391631A CN110391631A CN201810353727.6A CN201810353727A CN110391631A CN 110391631 A CN110391631 A CN 110391631A CN 201810353727 A CN201810353727 A CN 201810353727A CN 110391631 A CN110391631 A CN 110391631A
- Authority
- CN
- China
- Prior art keywords
- conducting wire
- tie point
- tension lines
- sag variation
- variation
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
- H02G7/06—Suspensions for lines or cables along a separate supporting wire, e.g. S-hook
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/12—Devices for maintaining distance between parallel conductors, e.g. spacer
Abstract
The present invention discloses a kind of method that can reduce conducting wire sag variation, comprising the following steps: parallel tension lines is set on the outside of conducting wire；Often it is separated by pre-determined distance in the tension lines and sets at least one first tie point, first tie point is corresponded on the conducting wire and sets the second tie point；Affixed by connector with corresponding second tie point in each first tie point, the tension lines plays the role of suspension to the conducting wire.Method of the invention can effectively reduce conducting wire sag variation, and be connected firmly, highly-safe, realize the purpose for reducing conducting wire sag variation at lower cost.In the case that conducting wire is two or more, transmission line of electricity conveying capacity and anticorona ability can be played to the maximum extent, while can guarantee the arc sag variation of every conducting wire, to ensure that the safety of transmission of electricity while improving conducting wire power transmission efficiency.
Description
Technical field
The present invention relates to lead technology fields, more particularly to a kind of method that can reduce conducting wire sag variation.
Background technique
It is well known that the electric current passed through in the conducting wire of transmission line of electricity can be such that conductor temperature increases, conductor temperature is increased simultaneously
Conducting wire expansion elongation, causes conducting wire sag to increase, and is will lead to when serious to the insufficient short circuit dischange of scissors crossing object distance.It is common
Way is to increase the height of shaft tower in capital construction, reserves enough nargin for arc sag variation.And shaft tower height increases, and can directly increase
Add construction cost.
With the increase of power load, part transmission line of electricity is caused to overload.It is replaced if be transformed using plain conductor,
It needs to increase sectional area of wire, will exceed the weight bearing power of original shaft tower, need to build shaft tower and its basis again, investment is very
Greatly.
The capacity-improving conducting wires of the prior art replace the steel core of common steel-cored aluminium strand using the smaller material of linear expansion coefficient, adopt
Conventional aluminium is replaced with heat-resisting aluminium alloy, can make capacity-improving conducting wires that there is arc more lower than plain conductor when operating temperature is higher
It hangs down variation, so as to realize that replacing capacity-improving conducting wires on original shaft tower can be realized increase-volume by a relatively large margin, substitute steel core
Material has carbon fiber core, invar steel core, Al-base ceramic fiber composite core etc..But there is also following shortcomings for the prior art: 1, holding
It is wrapped up by the alternative materials of tension by aluminum stranded conductor, in aluminum stranded conductor adstante febre, temperature is synchronous with aluminum stranded conductor to be risen, even if having than steel
Smaller linear expansion coefficient, the arc sag of conducting wire still will increase half or so, especially below inflection temperature (about 110 DEG C),
The sag characteristic of above-mentioned capacity-improving conducting wires is not significant compared with plain conductor.Existing plain conductor arc sag over the ground and to intersect across
When more object distance lacks redundancy nargin, any arc sag variation beyond plain conductor temperature rise to maximum operating temperature (70 DEG C) is all
Do not allow, so that the compatibilization effect of common capacity-improving conducting wires is restricted.2, material cost is higher, as invar belongs to iron nickel
One kind of alloy, ingredient are nickel 36%, and price is higher.3, material poor durability, such as carbon fiber core are easy when constructing bending
It fractures, in long-play meeting aging fracture etc..
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind to be connected firmly, highly-safe, ability to transmit electricity
By force, the lower-cost method for reducing conducting wire sag variation.
Technical scheme is as follows: the method that one kind can reduce conducting wire sag variation, comprising the following steps:
Parallel tension lines is set on the outside of conducting wire；
Often it is separated by pre-determined distance in the tension lines and sets at least one first tie point, described first is corresponded on the conducting wire
Tie point sets the second tie point；
Each first tie point is affixed by connector with corresponding second tie point, and the tension lines plays the conducting wire outstanding
The effect of extension.
Further, the tension lines uses steel strand wires.
Further, the range of the pre-determined distance is at 1 ~ 100 meter.
Further, the pre-determined distance is less than or equal to the half of place shaft tower span.
Optionally, the connector includes preformed armor rods.
Optionally, the connector includes conductor spacer, the tension lines at least provided with one, the conducting wire be equipped with two or
It two or more, is spaced and connects by conductor spacer between the conducting wire, the tension lines.
Wherein, it is connected between the conductor spacer and the conducting wire, the tension lines using preformed armor rods.
Wherein, the tension lines is located at the top or middle part of the conducting wire.
Compared with the existing technology, it can effectively reduce conducting wire sag the beneficial effects of the present invention are: method of the invention to become
Change, and is connected firmly, it is highly-safe, the purpose for reducing conducting wire sag variation is realized at lower cost, and conducting wire is two or more
In the case where, conducting wire sag variation can be equally reduced, using this method to play transmission line of electricity conveying capacity to the maximum extent.
Detailed description of the invention
Fig. 1 is the overall effect figure of the embodiment of the present invention one；
Fig. 2 is the side schematic view of the embodiment of the present invention one；
Fig. 3 is the side schematic view of the embodiment of the present invention two and embodiment three；
Fig. 4 is the schematic cross-section of the embodiment of the present invention two；
Fig. 5 is the schematic cross-section of the embodiment of the present invention three.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Embodiment one
As shown in Figure 1 and Figure 2, the present embodiment provides the methods that one kind can reduce conducting wire sag variation, comprising the following steps:
Parallel tension lines 2 is set on the outside of conducting wire 1；
Often it is separated by pre-determined distance in tension lines 2 and sets at least one first tie point 4, corresponding first tie point 4 is set on conducting wire 1
Second tie point 5；
Affixed by connector 6 with corresponding second tie point 5 in each first tie point 4, tension lines 2 plays conducting wire 1 outstanding
The effect of extension, and will not be deformed with the raising of the temperature of conducting wire 1.
The present embodiment makes its tie point be fixed on tension lines 2 by separated by a distance on conducting wire 1 by a connection piece 6
On, it is separated by 1 ~ 100m setting, one connection, pre-determined distance is less than or equal to the half of 3 span of place shaft tower, preferably default
Distance is 30m.By calculating, which is that 1 arc sag of conducting wire changes lesser preferable distance, under different temperatures, arc sag phase
Poor little, the tension lines 2 plays the role of propping up conducting wire 1, so that the active force of conducting wire 1 is all attached in tension lines 2.It connects
It connects securely, it is highly-safe, it ensure that the stability of transmission of electricity.
Preferably, the tension lines 2 is adopted as steel strand wires, stabilized structure.
As shown in Fig. 2, the connector 6 is adopted as preformed armor rods in the present embodiment.First tie point 4 and the second tie point 5
It is corresponding be equipped with it is several, between several first tie points 4 and the second tie point 5 pass through preformed armor rods solderless wrapped connection.
In the present embodiment, the conducting wire 1 is steel-cored aluminium strand or aluminium alloy stranded conductor.The preformed armor rods use aluminium alloy or aluminium
Baogang's material.
In the present embodiment, the junction of the conducting wire 1 and tension lines 2 is contactless connection.Certainly, contact can also be used
Formula connection.
The present embodiment is the method for reducing conducting wire sag variation of single wire, is suitable for the transmission line of electricity of 35 ~ 220kV.
Embodiment two
As shown in Figure 3, Figure 4, the present embodiment provides the method that one kind can reduce conducting wire sag variation, the conducting wire 1 is equipped with two,
It is spaced between two conducting wires 1 by several conductor spacers 7, the conducting wire 1 is separated by 20 ~ 50m and a conductor spacer 7 is arranged, described
The tie point of conductor spacer 7 and the conducting wire 1 corresponds to second tie point in the tension lines 2 as second tie point 5
5 the first tie points 4 of setting, each first tie point 4 are affixed by conductor spacer 7 with corresponding second tie point 5.The tension lines
2 are located at the top of conducting wire 1.
In the present embodiment, for tension lines 2 at least provided with one, the first tie point 4 and the second tie point 5 are correspondingly provided with one,
Preferably, connecting between the conducting wire 1, conductor spacer 7, tension lines 2 by preformed armor rods, it ensure that the positioning of conductor spacer 7 is motionless.
The conducting wire 1 of the present embodiment has additional two, improves the conveying capacity of transmission line of electricity, while can effectively reduce two
The arc sag of conducting wire 1 changes, and ensure that the safety of transmission of electricity.The present embodiment is suitable for the transmission line of electricity of 220 ~ 500kV.
Embodiment three
As shown in figs. 3 and 5, the present embodiment provides the method that one kind can reduce conducting wire sag variation, the conducting wire 1 is equipped with several
Item is spaced between conducting wire 1 and conducting wire 1 by conductor spacer 7, and the conducting wire 1 is separated by 20 ~ 50m and a conductor spacer 7, institute is arranged
The tie point of conductor spacer 7 and the conducting wire 1 is stated as second tie point 5, correspond to described second in the tension lines 2 and connects
5 the first tie point 4 of setting of point, each first tie point 4 are affixed by conductor spacer 7 with corresponding second tie point 5.The tension
Line 2 is located at the middle part of conducting wire 1, and conducting wire 1, conductor spacer 7 pass through preformed armor rods between tension lines 2 and connect.
The conducting wire 1 of the present embodiment is added to several, plays transmission line of electricity conveying capacity and anticorona ability to the maximum extent,
The arc sag variation that every conducting wire 1 can be reduced simultaneously, to ensure that the safety of transmission of electricity while improving 1 power transmission efficiency of conducting wire
Property.The present embodiment is suitable for the transmission line of electricity of 500kV or more.
The above is merely preferred embodiments of the present invention, be not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (8)
1. the method that one kind can reduce conducting wire sag variation, which comprises the following steps:
Parallel tension lines is set on the outside of conducting wire；
Often it is separated by pre-determined distance in the tension lines and sets at least one first tie point, described first is corresponded on the conducting wire
Tie point sets the second tie point；
Each first tie point is affixed by connector with corresponding second tie point, and the tension lines plays the conducting wire outstanding
The effect of extension.
2. the method that one kind according to claim 1 can reduce conducting wire sag variation, which is characterized in that the tension lines is adopted
Use steel strand wires.
3. the method that one kind according to claim 1 can reduce conducting wire sag variation, which is characterized in that the pre-determined distance
Range at 1 ~ 100 meter.
4. the method that one kind according to claim 1 can reduce conducting wire sag variation, which is characterized in that the pre-determined distance
Less than or equal to the half of place shaft tower span.
5. the method that one kind according to claim 1 can reduce conducting wire sag variation, which is characterized in that the connector packet
Include preformed armor rods.
6. the method that one kind according to claim 1 can reduce conducting wire sag variation, which is characterized in that the connector packet
Conductor spacer is included, the tension lines is at least provided with one, and the conducting wire is equipped with two or more, the conducting wire, the tension
It is spaced and connects by conductor spacer between line.
7. one kind according to claim 6 can reduce conducting wire sag variation method, which is characterized in that the conductor spacer with
It is connected between the conducting wire, the tension lines using preformed armor rods.
8. the method that one kind according to claim 6 can reduce conducting wire sag variation, which is characterized in that the tension lines is set
On the top or middle part of the conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353727.6A CN110391631A (en) | 2018-04-19 | 2018-04-19 | A kind of method reducing conducting wire sag variation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353727.6A CN110391631A (en) | 2018-04-19 | 2018-04-19 | A kind of method reducing conducting wire sag variation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110391631A true CN110391631A (en) | 2019-10-29 |
Family
ID=68283332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810353727.6A Pending CN110391631A (en) | 2018-04-19 | 2018-04-19 | A kind of method reducing conducting wire sag variation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110391631A (en) |
-
2018
- 2018-04-19 CN CN201810353727.6A patent/CN110391631A/en active Pending
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