CN203394141U - Single-circuit T-shaped slope tower - Google Patents
Single-circuit T-shaped slope tower Download PDFInfo
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- CN203394141U CN203394141U CN201320466503.9U CN201320466503U CN203394141U CN 203394141 U CN203394141 U CN 203394141U CN 201320466503 U CN201320466503 U CN 201320466503U CN 203394141 U CN203394141 U CN 203394141U
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Abstract
A single-circuit T-shaped slope tower comprises a tower body, a tower head, wire cross arms and insulator strings, wherein the insulator strings are arranged on the wire cross arms; the three wire cross arms are arranged as a staircase in a staggered manner along a hill slope; one wire cross arm is arranged on an uphill side of the tower body; the other two wire cross arms are arranged on a downhill side of the tower body and are arranged vertically; and the upper wire cross arm on the downhill side is flush with the wire cross arm on the uphill side, and a 'T'-shaped slope tower structure is formed. The three single-circuit wire cross arms are arranged as the staircase in the staggered manner, the height from the wire cross arms on the downhill side to the ground is reduced, the effective height of a pole tower is sufficiently utilized, lightning strip-out is reduced, and the lightning withstand level of an ultra-high-voltage alternating-current circuit of a mountain area can be effectively improved.
Description
Technical field
The utility model relates to a kind of pylon structure for ac transmission engineering single back line, especially a kind ofly can meet landform along the line and take mountain region as power transmission engineering circuit pylon structure main, that the movable stronger area of electric network thunder and lightning is used.
Background technology
Both at home and abroad in the 500kV that builds and put into operation and the above Flow Line overwhelming majority that singly backcrosses, all adopt " cat head " type tower that three-phase conducting wire is triangularly arranged or " wineglass " type tower of horizontal symmetrical layout.Mountain area extra-high voltage AC circuit is for reducing shaft tower height, generally all adopt " wineglass " type tower, as shown in Figure 1, the composition of this pylon structure comprises tower body 11, tower head 12, the wire cross-arm 13 being arranged symmetrically with and be arranged on insulator string 14 on wire cross-arm 13 etc., the feature of this symmetric form tower is: tower structure is arranged simple, stress equalization, and operating experience is abundant.
For mountain route, easily recruit the situation of thunderbolt, the emphasis of design be meet the minimum distance to the ground of wire and to the prerequisite of forest scissors crossing distance under reduce tower height as far as possible, reduce conductor height.Situation from circuit actual motion, because most of mountain route exists the situation along hillside cabling, when adopting the wine glass-shaped tower of horizontal cross-arm, meeting steep side wire over the ground or handing over span from rear to the minimum of trees, due to the existence of the mountain region gradient, add that the adjacent two phase conductor horizontal ranges of extra-high-voltage alternating current are large, reach 20-22 rice, now descend hillside side wire distance to the ground much larger than steep side, greatly increased the thunderstruck probability of circuit, the gradient is more obvious more greatly.Operating experience shows the overhead wire of ，Yan hillside cabling, and what lightning fault occurred is positioned at slope side wire substantially.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, for mountain route, there is the path feature along cabling extra-high voltage single loop alternating current circuit, hillside, and a kind of tripping rate with lightning strike that can reduce is provided, improve font side slope tower under the single loop of UHVDC Transmission Lines lightning withstand level.
The purpose of this utility model completes by following technical solution, described single loop mo(u)ld bottom half side slope tower, it comprises: tower body, tower head, wire cross-arm and be arranged on the insulator string on wire cross-arm, described three-phase conducting wire cross-arm carries out ladder dislocation along hillside landform and arranges, wherein tower body steep side is installed a phase conductor cross-arm, under tower body, hillside side is installed two phase conductor cross-arms, side two phase conductor cross-arms in lower hillside are arranged up and down, the upper phase conductor cross-arm of lower hillside side is concordant with the wire cross-arm of steep side, and forms a D score font side slope tower structure.
The utility model is mainly to adopt font side slope tower design under ladder cross-arm, in the situation that consider the impact of the mountain topography gradient, three-phase conducting wire cross-arm is carried out to ladder layout, reduce the wire cross-arm of lower hillside side to ground level, make full use of shaft tower effective height, reduce tripping rate with lightning strike, improve UHVDC Transmission Lines lightning withstand level.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing " wineglass " type tower.
Fig. 2 is the structural representation of lower font side slope tower described in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 2, font side slope tower under single loop described in the utility model, it comprises: tower body 21, tower head 22, wire cross-arm 23 and be arranged on the insulator string 24 on lead wire and earth wire cross-arm 23, described three-phase conducting wire cross-arm 23Yan hillside landform is carried out ladder layout in tower body both sides, wherein tower body steep side is installed a phase conductor cross-arm 231, under tower body, hillside side is installed two phase conductor cross-arms 232 and 233, side two phase conductor cross-arms in lower hillside are arranged up and down, in the side of lower hillside, phase conductor cross-arm 232 is concordant with the wire cross-arm 231 of steep side, thereby form D score font side slope tower structure
Embodiment:
Average grade by the cabling region, statistics ，Yan hillside to line of project mountain topography situation is 30 ° of-40 ° of left and right.According to tower head gap deployment scenarios, on two, under the side of phase conductor horizontal arrangement situation Xia，Xia hillside, between phase conductor and steep side phase conductor, horizontal range is in 29m left and right, and vertical distance is in 20m left and right, the angle of two phase conductor lines and level ground is 35 ° of left and right, and both average grades are basically identical
Lower font side slope tower described in the utility model is compared with the wine glass-shaped tower shown in Fig. 1, because lower font side slope tower is used, exhales high reduction, and its tower weight is compared with light 5% left and right of wineglass tower; The basic role power of lower font side slope tower is greater than wine glass-shaped tower, and its base concrete amount improves 15% compared with wineglass tower.Comprehensively compare, two kinds of tower tower weights and basic body investment can be thought consistent.
The comparative analysis of the anti-shielding performance of lower font side slope tower and conventional wine glass-shaped tower shows: when ground inclination angle, mountain area is during at 18-40 °, lower font tower claims that exhaling of planning in high scope, its anti-shielding performance is all better than conventional wine glass-shaped tower; Especially exhale title high within the scope of 55-70m, the former is obviously better than the latter especially at anti-shielding performance.Lower font side slope tower tower head arranges that being applied to mountain region circuit can obtain good anti-shielding effect.
Because extra-high voltage AC circuit itself has very high dielectric level, the counterattack lightning withstand level of lower font tower and wine glass-shaped tower is all very high.Generally, the counterattack lightning withstand level of lower font side slope tower still reaches nearly 250kA when ground resistance is 30 Ω, strikes back trip-out rate accordingly 0.021(time/100km).
For font tower under the single loop of ladder cross-arm, as calculated, adopting in the conductor cross-section situation identical with wine glass-shaped tower, its total electric field, ion current density, magnetic induction intensity, radio interference, audible noise all meet the requirement of rules limit value, and suitable with wine glass-shaped tower.
1), the tower head basic demand of arranging,
The basic problem that tower head is arranged be guarantee between lead wire and earth wire, between wire and they and shaft tower member and operating maintenance personnel between necessary gap.For guaranteeing that circuit normally moves, need the controlled condition of considering can be divided into thunderbolt or the needed lead wire and earth wire positioned opposite of counterattack wire in electric clearance, the wire spacing in span and the defence span on tower head.
2) electric clearance, on tower head,
Under the operating modes such as power-frequency voltage, operation and the lightning surge in tower head gap circle and hotline maintenance, wire windage yaw track is to the minimum clearance between shaft tower member and operating maintenance personnel, all belong to wire to shaft tower or electric clearance relatively, it doesn't matter with wire spacing in span.
3) wire spacing, on tower head,
Wire spacing in tower head layout, specially finger stop meets electric equipment compartment distance between necessary line apart from central authorities, and on tower head, between lead wire and earth wire insulator string hanging point, needs the wire spacing of maintenance.
Line design technical specification is to come from empirical formula or the numerical relation table of line project practice, the wire spacings such as the horizontal spacing on circuit tower head and vertical separation, horizontal-shift have been made to general provision, when conditions permit, first consider to adopt (allow slightly and select).
4), thunderbolt or counterattack wire needed lead wire and earth wire positioned opposite in defence span,
For defence thunderbolt wire, need to determine the minimum space distance between wire and ground wire, and the distance between two ground wires.
Lightning protection angle
According to rules requirement, mountain segment line grounding wire is pressed-6 ° of designs to the lightning protection angle of wire.
5), the vertical interval of upper and lower phase conductor cross-arm
Tangent tower tower body left and right sides cross-arm is ladder to be arranged, makes the inconsistent ，Yu of the suspension height level ground of left and right two-phase lower wire be certain inclination angle.The span at this inclination angle need be used the mountain region gradient situation of section to determine according to shaft tower, generally considers to conform to mountain region average grade, and steep side is arranged two wire cross-arms of a phase conductor cross-arm ,Xia hillside side layout.
According to statistics, extra-high-voltage alternating current list back transmission line need be used the average grade of mountain region section of font side slope tower under ladder cross-arm 30-35 ° of left and right, conforms to mountain region gradient statistical conditions through the line project in East China in the past.Therefore, under planning and designing during font side slope tower, consider that the vertical intervals of the two phase conductor cross-arms that under tower body left and right sides, phase conductor hanging point line and the angle on ground are arranged up and down by 33 ° of consideration ，Xia hillside sides are got 20 meters.
6), wire suspension insulator,
Consistent with conventional levels cross-arm wine glass-shaped tower limit phase conductor hang, under single loop, font side slope tangent tower wire suspension string is all arranged by I type string.
Claims (1)
1. font side slope tower under a single loop, it comprises: tower body, tower head, wire cross-arm and be arranged on the insulator string on wire cross-arm, it is characterized in that described three-phase conducting wire cross-arm carries out ladder dislocation along hillside landform and arranges, wherein tower body steep side is installed a phase conductor cross-arm, under tower body, hillside side is installed two phase conductor cross-arms, side two phase conductor cross-arms in lower hillside are arranged up and down, the upper phase conductor cross-arm of lower hillside side is concordant with the wire cross-arm of steep side, and forms a D score font side slope tower structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466503.9U CN203394141U (en) | 2013-08-01 | 2013-08-01 | Single-circuit T-shaped slope tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466503.9U CN203394141U (en) | 2013-08-01 | 2013-08-01 | Single-circuit T-shaped slope tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394141U true CN203394141U (en) | 2014-01-15 |
Family
ID=49905681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320466503.9U Expired - Lifetime CN203394141U (en) | 2013-08-01 | 2013-08-01 | Single-circuit T-shaped slope tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203394141U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967316A (en) * | 2014-03-24 | 2014-08-06 | 方元 | Novel iron tower suitable for terrain with gradient within 10 degrees |
| CN109236015A (en) * | 2018-11-20 | 2019-01-18 | 国家电网有限公司 | A kind of Tibet High aititude cliffy mountain single loop shaft tower |
| CN110259244A (en) * | 2019-05-30 | 2019-09-20 | 武汉明心电力科技有限公司 | A kind of dry font strain insulator side slope tower |
-
2013
- 2013-08-01 CN CN201320466503.9U patent/CN203394141U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967316A (en) * | 2014-03-24 | 2014-08-06 | 方元 | Novel iron tower suitable for terrain with gradient within 10 degrees |
| CN109236015A (en) * | 2018-11-20 | 2019-01-18 | 国家电网有限公司 | A kind of Tibet High aititude cliffy mountain single loop shaft tower |
| CN110259244A (en) * | 2019-05-30 | 2019-09-20 | 武汉明心电力科技有限公司 | A kind of dry font strain insulator side slope tower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP ZHEJIANG ELECTRIC P Free format text: FORMER NAME: ZHEJIANG PROV. ELECTRIC POWER DESIGN INST. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 310012 GUCUI Road No. 68 Patentee after: CHINA ENERGY ENGINEERING GROUP ZHEJIANG ELETERIC POWER DESIGN INSTITUTE Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310012 GUCUI Road No. 68 Patentee before: Zhejiang Electric Power Design Inst. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |