CN204238623U - A kind of staggered floor cross-arm tower of same tower double back transmission line - Google Patents
A kind of staggered floor cross-arm tower of same tower double back transmission line Download PDFInfo
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- CN204238623U CN204238623U CN201420675575.9U CN201420675575U CN204238623U CN 204238623 U CN204238623 U CN 204238623U CN 201420675575 U CN201420675575 U CN 201420675575U CN 204238623 U CN204238623 U CN 204238623U
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Abstract
A kind of staggered floor cross-arm tower of same tower double back transmission line, it comprises: tower body, tower head, wire cross-arm and the insulator string be arranged on lead wire and earth wire cross-arm, described upper, middle and lower, left and right wire cross-arm carries out staggered floor layout along hillside cabling, the wire cross-arm of the wherein said side, lower hillside be arranged on tower body is low relative to the wire cross-arm position of steep side, forms upper, middle and lower, left and right staggered floor cross-arm tower structure; It adopts left and right staggered floor cross-arm design, its objective is the impact considering the mountain topography gradient, staggered floor layout is carried out to upper, middle and lower, left and right wire cross-arm, reduce the wire cross-arm of lower side, hillside to ground level, make full use of shaft tower effective height, reduce tripping rate with lightning strike, improve the overall lightning withstand level of transmission line of electricity.
Description
Technical field
The utility model relates to a kind of can meet landform along the line based on mountain region, the staggered floor cross-arm tower of same tower double back transmission line that uses of the movable stronger area of electric network thunder and lightning, belong to a kind of pylon structure of overhead transmission line.
Background technology
Left and right horizontal is all adopted to be arranged symmetrically with the steel tower of cross-arm at the 220kV built and put into operation and the above dual loop transmission line overwhelming majority both at home and abroad, this pylon structure as shown in Figure 1, its composition comprises tower head 11, tower body 12, tower leg 13 and " I " type insulator string 19 etc., and wherein tower head 11 mainly comprises tower head body portion 14, earth wire support 15, upper conductor cross-arm 16, middle wire cross-arm 17, lower wire cross-arm 18; The feature of this symmetrical cross-arm tower is: tower structure arranges simple, stress equalization, and operating experience is enriched.
Easily recruit the situation of thunderbolt for mountain route, the emphasis of design be meet the minimum distance to the ground of wire and to the prerequisite of forest crossed crossing distance under reduce tower height as far as possible, reduce conductor height.From the situation of circuit actual motion, because most of mountain route exists the situation along hillside cabling, when adopting left and right staggered floor cross-arm tower, meeting steep side wire over the ground or to the minimum friendship span of trees from rear, due to the existence of the mountain region gradient, now descend side, hillside wire distance to the ground much larger than steep side, considerably increase the thunderstruck probability of circuit, the gradient is more large more obvious.Operating experience shows, along the overhead wire of hillside cabling, occur lightning fault generally within side, lower hillside wire.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art existence, there is the path feature along hillside cabling for mountain route, and the staggered floor cross-arm tower of the same tower double back transmission line providing a kind of upper, middle and lower wire cross-arm to arrange with massif gradient staggered floor.
The purpose of this utility model has been come by following technical solution, the staggered floor cross-arm tower of described same tower double back transmission line, it comprises: tower head, tower body, tower leg and the insulator string be arranged on lead wire and earth wire cross-arm, described upper, middle and lower, left and right wire cross-arm carries out staggered floor layout along hillside cabling, the upper, middle and lower wire cross-arm of the wherein said side, lower hillside be arranged on tower body is low relative to the wire cross-arm position, upper, middle and lower of steep side, forms left and right staggered floor cross-arm tower structure.
Upland transmission line pylon structure described in the utility model adopts left and right staggered floor cross-arm design, its objective is the impact considering the mountain topography gradient, staggered floor layout is carried out to upper, middle and lower, left and right wire cross-arm, reduce the wire cross-arm of lower side, hillside to ground level, make full use of shaft tower effective height, reduce tripping rate with lightning strike, improve the overall lightning withstand level of transmission line of electricity.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing symmetrical cross-arm tower.
Fig. 2 is the structural representation of staggered floor cross-arm tower described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed introduction is done to the utility model: shown in Fig. 2, the left and right staggered floor cross-arm tower of same tower double back transmission line described in the utility model, it comprises: tower head 21, tower body 22, tower leg 23 and " I " type insulator string 29 etc., and wherein tower head 21 mainly comprises tower head body portion 24, earth wire support 25, upper conductor cross-arm 26, middle wire cross-arm 27, lower wire cross-arm 28; The upper, middle and lower wire cross-arm of the described left and right sides carries out staggered floor layout along hillside cabling, and the wire cross-arm of the wherein said side, lower hillside be arranged on tower body 22 is low relative to the wire cross-arm position of steep side, forms left and right staggered floor cross-arm tower structure.
Embodiment:
According to the statistics to line of project mountain topography situation, along the zone leveling gradient of hillside cabling at about 30 °, cross-arm 6m lower than cross-arm under steep side under side, hillside under staggered floor cross-arm tower, both lines and horizontal plane angle are 30 °, basic consistent with mountain region average grade.
Symmetrical cross-arm tower tower weight shown in staggered floor cross-arm tower described in the utility model and Fig. 1 is substantially suitable, and staggered floor cross-arm tower slightly weighs about 2%; The basic role power of staggered floor cross-arm tower is less than symmetrical cross-arm tower, and corresponding base concrete amount saves about 5%.Comprehensively compare, the body investment on two kinds of tower tower weights and basis can be thought consistent.
The comparative analysis of the anti-shielding performance of staggered floor cross-arm tower and symmetrical cross-arm tower shows: when ground inclination angle, mountain area is at 25-35 °, staggered floor cross-arm tower claims in high scope in exhaling of planning, anti-shielding performance is improved greatly, 49% is reduced than symmetrical cross-arm tower, ground elevation is larger, anti-shielding effect is better, and its anti-shielding performance is all better than symmetrical cross-arm tower in general, and staggered floor cross-arm tower tower head arranges that being applied to mountain region circuit can obtain good anti-shielding effect.
According to statistics, this engineering need use the average grade of the mountain region section of staggered floor cross-arm tower at 25 ° about-35 °, conforms to the mountain region gradient statistical conditions of line project in the past.Therefore, when planning and designing staggered floor cross-arm tower, consider that the angle on left and right two loop lines and ground is considered by 30 °, the wire spacing of phase conductor is descended most according to conventional double loop tower, vertical distance is at about 5.5m-6.5m, consider that 220kV cross-arm floor height is at about 6m-7m, therefore wrong for loop, left and right cross-arm one deck is arranged.
Claims (1)
1. a same tower double back transmission line staggered floor cross-arm tower, it comprises: tower body, tower head, wire cross-arm and the insulator string be arranged on lead wire and earth wire cross-arm, it is characterized in that described upper, middle and lower, left and right wire cross-arm carries out staggered floor layout along hillside cabling, the wire cross-arm of the wherein said side, lower hillside be arranged on tower body is low relative to the wire cross-arm position of steep side, forms upper, middle and lower, left and right staggered floor cross-arm tower structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675575.9U CN204238623U (en) | 2014-11-13 | 2014-11-13 | A kind of staggered floor cross-arm tower of same tower double back transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675575.9U CN204238623U (en) | 2014-11-13 | 2014-11-13 | A kind of staggered floor cross-arm tower of same tower double back transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204238623U true CN204238623U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420675575.9U Active CN204238623U (en) | 2014-11-13 | 2014-11-13 | A kind of staggered floor cross-arm tower of same tower double back transmission line |
Country Status (1)
| Country | Link |
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| CN (1) | CN204238623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374595A (en) * | 2018-01-26 | 2018-08-07 | 中国电力科学研究院有限公司 | A kind of assembled staggered floor cross-arm tangent tower and its vertical tower method |
-
2014
- 2014-11-13 CN CN201420675575.9U patent/CN204238623U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374595A (en) * | 2018-01-26 | 2018-08-07 | 中国电力科学研究院有限公司 | A kind of assembled staggered floor cross-arm tangent tower and its vertical tower method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 68 GUCUI Road, Hangzhou, Zhejiang Province Patentee after: Energy source in China construction group Zhejiang Province Power Design Institute Co., Ltd Address before: No. 68 GUCUI Road, Hangzhou, Zhejiang Province Patentee before: Zhejiang Electric Power Design Institute |