CN104201634B - A kind of single back line intersects cutoff method - Google Patents

A kind of single back line intersects cutoff method Download PDF

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Publication number
CN104201634B
CN104201634B CN201410393074.6A CN201410393074A CN104201634B CN 104201634 B CN104201634 B CN 104201634B CN 201410393074 A CN201410393074 A CN 201410393074A CN 104201634 B CN104201634 B CN 104201634B
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arm
cross
font
tower
under
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CN104201634A (en
Inventor
王力
赵晖
于永洋
罗正帮
李晓黎
刘传健
李卫国
陈黎明
谢涛
程金松
许谨
葛宜俊
王向阳
张�浩
郑少将
邹本为
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Chen Liming
Cheng Jinsong
Ge Yijun
Li Weiguo
Li Xiaoli
Liu Chuanjian
Luo Zhengbang
Wang Li
Wang Xiangyang
Xie Tao
Xu jin
Yu Yongyang
Zhang Hao
Zhao Hui
Zheng Shaojiang
Zou Benwei
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Abstract

A kind of single back line intersects cutoff method, and it is related to ultra-high-tension power transmission line technical field.This method using two base single loop anchor supports after former circuit is cut-off; with unification Ji Jiaochahuanweita; using the transposition tower it is anti-" under " font upper strata cross-arm with " on " lower floor's cross-arm of font realizes the coordinated transposition of circuit; double loop angle steel tower is accessed afterwards; and utilize " T " font ground wire cross-arm of coordinated transposition tower, it is ensured that lightning protection.Coordinated transposition tower in this method of the present invention rationally utilizes wire cross-arm; reduce the use condition of shaft tower; the tower head height of reduction about 25%, has saved construction investment, overall structure is more stable; reduce the input of a base shaft tower; floor space is reduced, opposition tower position requires relatively low, while lightning protection is ensured; avoid ground wire from intersecting, further have compressed tower head size.

Description

A kind of single back line intersects cutoff method
Technical field:
Patent of the present invention is related to ultra-high-tension power transmission line technical field, more particularly to a kind of single back line intersects cutoff method.
Background technology:
According to system schema, influenceed by transformer station geographical position, single back line needs to intersect access not homonymy change after cut-offfing The situation in power station is increasingly popular.
At present, conventional single loop intersection, which cut-offs mode, mainly following two:
1) method one:After being cut-off using two base single loop anchor supports, using the branch of a circuit tower of a base four, branch tower is utilized The unilateral cross-arm of three floor not homonymy intersects the 2 loop line roads formed after access single back line cut-offs respectively up and down, and this mode can not The cross-arm of four branch of a circuit towers is made full use of, and the tower head of four branch of a circuit towers is higher, there is a situation where to waste tower material, and cross-arm Asymmetric, tower resistance to overturning is poor.
2) method two:Cut-off using two base single loop tension-resistant rods after circuit, using a base double loop branch tower with unification base Single time anchor support realizes that intersection is cut-off, and the method is completed after crossing elimination leap first with single time anchor support of a base, then accesses one Base double loop branch tower, completes to cut-off the coordinated transposition of line for twice, this method needs two Ji Ta to realize the friendship after line disconnection Fork transposition, and floor space is larger, in the part limited area of vertical tower position, it tends to be difficult to realize.
Patent of invention content:
The purpose of patent of the present invention is to propose that a kind of single back line intersects the method cut-off, and this method is using two bases single time Road anchor support is cut-off after former circuit, with unification Ji Jiaochahuanweita, using the transposition tower it is anti-" under " font upper strata cross-arm with " on " lower floor's cross-arm of font realizes the coordinated transposition of circuit, double loop angle steel tower is accessed afterwards, and utilize coordinated transposition tower " T " font ground wire cross-arm, it is ensured that lightning protection.
In order to solve problem present in background technology, the technical scheme is that:
First single back line is cut-off using two base single loop anchor supports;
Then the single back line after cut-offfing is met into a Ji Jiaochahuanweita again, the coordinated transposition tower includes tower body, tower body Top is provided with " T " font ground wire cross-arm, be provided with below ground wire cross-arm it is anti-" under " font topping wire cross-arm, it is anti-" under " font Be provided with below topping wire cross-arm " on " layer conductor cross-arm under font, it is described it is anti-" under " font topping wire cross-arm is by tower body two Lower cross-arm composition on the left of the upper cross-arm and tower body of side, it is described " on " under font upper cross-arm of the layer conductor cross-arm on the right side of tower body and The lower cross-arm composition of tower body both sides, it is described it is anti-" under " the upper cross-arm of font topping wire cross-arm, lower cross-arm and " on " font lower floor Upper cross-arm, lower cross-arm end on wire cross-arm can install strain insulator-string;
By coordinated transposition tower it is anti-" under " strain insulator-string side access right side single back line on font topping wire cross-arm, separately The left lead cross-arm of double loop angle steel tower is accessed in side, recycle " on " side joint of strain insulator-string one under font on layer conductor cross-arm Enter left side single back line, opposite side accesses the right side wire cross-arm of double loop angle steel tower, while utilizing " T " word of coordinated transposition tower The side cross-arm of type ground wire cross-arm three is respectively connected to ground wire, wherein the cross-arm towards breaking point connects the single-circuit inner side ground wire in both sides, separately Both sides connect the single-circuit outside ground wire in both sides respectively perpendicular to the cross-arm of ground wire direction of advance.
It is described it is anti-" under " the upper cross-arm of font topping wire cross-arm, lower cross-arm and " on " it is upper on layer conductor cross-arm under font Cross-arm, lower cross-arm end can install wire jumper support.
Jumper string is hung with below each wire jumper support.
Patented method of the present invention has the advantage that compared with conventional method:
1) this method is compared with conventional method one, by using " on " under font layer conductor cross-arm and it is anti-" under " font upper strata The coordinated transposition tower of wire cross-arm structure, this tower rationally utilizes wire cross-arm, reduces the use condition of shaft tower, reduction about 25% Tower head height, reduce 6 unilateral wire cross-arms, saved construction investment, cross-arm is more symmetrical, and overall structure is more stable.
2) by way of installing wire jumper support and jumper string additional on coordinated transposition tower wire cross-arm, wire and wire jumper arc are made Hang down with tower body spacing meet outside cross, it is interior cross strong wind operating mode under with tower body electrical distance.
3) this method reduces the input of a base shaft tower compared with conventional method two, reduces floor space, opposition tower position Put and require relatively low.
4) design of " T " font ground wire cross-arm, while lightning protection is ensured, it is to avoid ground wire intersects, further It has compressed tower head size.
Brief description of the drawings:
Fig. 1 is wiring schematic diagram of the invention;
Fig. 2 is the structural representation of coordinated transposition tower in the inventive method;
Fig. 3 is Fig. 2 top view.
Embodiment:
It includes tower body 1 for coordinated transposition tower in reference picture 2-3, the inventive method, and the top of tower body 1 is provided with " T " font Ground wire cross-arm 4, the lower section of ground wire cross-arm 4 be provided with it is anti-" under " font topping wire cross-arm 2, it is anti-" under " font topping wire cross-arm 2 Lower section be provided with " on " layer conductor cross-arm 3 under font, it is described it is anti-" under " font topping wire cross-arm 2 by tower body both sides upper cross-arm With the lower cross-arm composition on the left of tower body, it is described " on " upper cross-arm and tower body both sides of the layer conductor cross-arm 3 on the right side of tower body under font Lower cross-arm composition, it is anti-" under " the upper cross-arm of font topping wire cross-arm 2, lower cross-arm and " on " under font on layer conductor cross-arm 3 Upper cross-arm, lower cross-arm end wire jumper support 5 and strain insulator-string can be installed, each lower section of wire jumper support 5 hangs with jumper string 6, " T " the font ground wire cross-arm 4 is one layer of three side cross-arm structure, wherein while towards breaking point, another both sides are before ground wire Enter direction.
Reference picture 1, Fig. 1 is wiring schematic diagram of the invention, first using two base single loop anchor supports 8 respectively by single back line Cut-off, then again by coordinated transposition tower it is anti-" under " the single loop line in the side of strain insulator-string 7 access right side on font topping wire cross-arm 2 Road, opposite side accesses the left lead cross-arm of double loop angle steel tower 9, recycle " on " strain insulator under font on layer conductor cross-arm 3 Go here and there 7 sides access left side single back line, opposite side access double loop angle steel tower 9 right side wire cross-arm, while being changed using intersection The side cross-arm of " T " font ground wire cross-arm 4 three of position tower is respectively connected to ground wire, wherein to connect both sides single-circuit towards the cross-arm of breaking point Inner side ground wire, another both sides connect the single-circuit outside ground wire in both sides respectively perpendicular to the cross-arm of ground wire direction of advance.The present invention passes through The left and right sides wire formed after single back line is cut-off is adjusted to opposite side from side, so as to realize that the intersection of both sides wire is changed Position.
The present invention by set by coordinated transposition tower it is anti-" under " to be arranged on tower body left for the lower cross-arm of font topping wire cross-arm 2 Side, by " on " the upper cross-arm of layer conductor cross-arm 3 is arranged on the right side of tower body under font, make above and below keep enough between layer conductor cross-arm Electric equipment compartment away from and combining and be actually needed and install wire jumper support 5 and jumper string 6 additional, it is ensured that it is electric with shaft tower that both sides wire meets wire The need for gas gap, so under conditions of shaft tower stress and electric clearance is met, single back line is only solved by a Ji Ta The coordinated transposition problem of wire after cut-offfing, reduces tower head size, while the tower material reduced in conventional cross transposition tower disappears Consumption, solves the poor shortcoming of economy, anti-in addition " under " the upper cross-arm of font topping wire cross-arm and " on " font lower floor The equal both sides of lower cross-arm of wire cross-arm are symmetrical, and it is anti-" under " the lower cross-arm of font topping wire cross-arm and " on " layer conductor under font The upper cross-arm position of cross-arm is nearer, smaller to the stability influence of tower body after both active forces to tower body are cancelled out each other so that The overall structure of tower body is more stable.
The present invention is respectively connected to ground wire using the side cross-arm of " T " font ground wire cross-arm 4 three of coordinated transposition tower, and passes through adjustment The length of " T " font ground wire cross-arm ensures the lightning protection of wire, it is to avoid ground wire intersects, and further have compressed tower head size.

Claims (3)

1. a kind of single back line intersects cutoff method, it is characterised in that it is including step:
First single back line is cut-off using two base single loop anchor supports;
Then the single back line after cut-offfing is met into a Ji Jiaochahuanweita again, the coordinated transposition tower includes tower body, tower body top Be provided with " T " font ground wire cross-arm, be provided with below ground wire cross-arm it is anti-" under " font topping wire cross-arm, it is anti-" under " font upper strata Be provided with below wire cross-arm " on " layer conductor cross-arm under font, it is described it is anti-" under " font topping wire cross-arm is by tower body both sides Lower cross-arm composition on the left of upper cross-arm and tower body, described " on " upper cross-arm and tower body of the layer conductor cross-arm on the right side of tower body under font The lower cross-arm composition of both sides, it is described it is anti-" under " the upper cross-arm of font topping wire cross-arm, lower cross-arm and " on " layer conductor under font Upper cross-arm, lower cross-arm end on cross-arm are respectively mounted strain insulator-string;
By coordinated transposition tower it is anti-" under " strain insulator-string side access right side single back line on font topping wire cross-arm, opposite side The left lead cross-arm of double loop angle steel tower is accessed, recycle " on " the strain insulator-string side access under font on layer conductor cross-arm is left Side single back line, opposite side accesses the right side wire cross-arm of double loop angle steel tower, while utilizing " T " font of coordinated transposition tower The side cross-arm of line cross-arm three is respectively connected to ground wire, wherein the cross-arm towards breaking point connects the single-circuit inner side ground wire in both sides, another both sides The single-circuit outside ground wire in both sides is connect respectively perpendicular to the cross-arm of ground wire direction of advance.
2. according to the method described in claim 1, it is characterised in that it is described it is anti-" under " the upper cross-arm of font topping wire cross-arm, Lower cross-arm and " on " upper cross-arm under font on layer conductor cross-arm, lower cross-arm end be respectively mounted wire jumper support.
3. method according to claim 2, it is characterised in that hang with jumper string below each wire jumper support.
CN201410393074.6A 2014-08-06 2014-08-06 A kind of single back line intersects cutoff method Active CN104201634B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105257067A (en) * 2015-09-07 2016-01-20 安徽华电工程咨询设计有限公司 Double-circuit double-sided breaking steel-tube tower using V-shaped combined strings
CN106555498A (en) * 2016-09-26 2017-04-05 安徽华电工程咨询设计有限公司 A kind of single time overhead transmission line cable cut-offs and draws lower angle tower
CN107394737B (en) * 2017-08-22 2018-12-28 四川电力设计咨询有限责任公司 Transmission line of alternation current intersects crossing structure
CN111927189A (en) * 2020-07-28 2020-11-13 国网安徽省电力有限公司经济技术研究院 Single-loop phase-adjustable breaking tower
CN113090095A (en) * 2021-03-18 2021-07-09 国核电力规划设计研究院有限公司 Loop crossing tower and loop crossing line
CN113090096B (en) * 2021-03-19 2022-11-29 国核电力规划设计研究院有限公司 Double-circuit power transmission line disconnection tower, disconnection system and method
CN113137112B (en) * 2021-04-14 2022-11-29 国网经济技术研究院有限公司 Power transmission tower based on equipment sharing

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CN201252381Y (en) * 2008-08-27 2009-06-03 曾亮 Power line single-circuit T connection steel pipe pole
CN201297055Y (en) * 2008-11-07 2009-08-26 浙江省电力设计院 Strain angle tower in the shape of Chinese character 'Gan' with shared-tower and three-circuit transmission line
WO2012025153A1 (en) * 2010-08-26 2012-03-01 Josep Tresserras Picas Kit for mounting one or more appliances on a pole
CN103046790A (en) * 2012-11-29 2013-04-17 安徽华电工程咨询设计有限公司 Novel single circuit T-connecting transmission tower
CN103046791A (en) * 2012-11-29 2013-04-17 安徽华电工程咨询设计有限公司 Transmission line tangent tower using double-loop cable T guide

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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201252381Y (en) * 2008-08-27 2009-06-03 曾亮 Power line single-circuit T connection steel pipe pole
CN201297055Y (en) * 2008-11-07 2009-08-26 浙江省电力设计院 Strain angle tower in the shape of Chinese character 'Gan' with shared-tower and three-circuit transmission line
WO2012025153A1 (en) * 2010-08-26 2012-03-01 Josep Tresserras Picas Kit for mounting one or more appliances on a pole
CN103046790A (en) * 2012-11-29 2013-04-17 安徽华电工程咨询设计有限公司 Novel single circuit T-connecting transmission tower
CN103046791A (en) * 2012-11-29 2013-04-17 安徽华电工程咨询设计有限公司 Transmission line tangent tower using double-loop cable T guide

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