JPH02114814A - Erection equipment and high-efficiency power transmission lines using it - Google Patents
Erection equipment and high-efficiency power transmission lines using itInfo
- Publication number
- JPH02114814A JPH02114814A JP63267773A JP26777388A JPH02114814A JP H02114814 A JPH02114814 A JP H02114814A JP 63267773 A JP63267773 A JP 63267773A JP 26777388 A JP26777388 A JP 26777388A JP H02114814 A JPH02114814 A JP H02114814A
- Authority
- JP
- Japan
- Prior art keywords
- power transmission
- conductor
- transmission line
- arm
- spacer
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims description 32
- 239000004020 conductor Substances 0.000 claims description 53
- 125000006850 spacer group Chemical group 0.000 claims description 21
- 239000000470 constituent Substances 0.000 claims description 17
- 239000012212 insulator Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Electric Cable Installation (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は線路インダクタンスを低減した高効率送電線路
及びその架設装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a highly efficient power transmission line with reduced line inductance and an installation device therefor.
（従来の技術）
従来の多導体送電線路は、第１０図に示されるように鉄
塔（５０）、（５０）に碍子装置（５１）、（５１）を
連結し、そのライン側ヨーク（５２）、（５２）間に各
構成導体（５３）、（５３）を４００〜５００１ｍ程度
の一定間隔で張設するとともに、スペーサ（５４）でこ
の間隔を保持させたものであった。ところが大電力を長
距離にわたって安定して送電するためには各構成導体（
５３）、（５３）を流れる電流によって生ずる線路イン
ダクタンスをできるだけ小さくすべきであることが明ら
かとなり、最近では一相当りの導体数を増加させたり、
同じ導体数でも導体間の間隔を１０００〜１５００龍と
大きくしてインダクタンスを低下させた高効率送電線路
が研究されている。しかしこのように各構成導体の間隔
を大きく取るためにはアース側ヨークやライン側コーク
などの碍子装置の金具が大きくなり、更に鉄塔アームや
鉄塔自体も大きくしなげればならず、既存の鉄塔が使用
できないこと、運搬、組立、取付等の架設作業が困難化
することなどの問題があった。(Prior Art) As shown in FIG. 10, a conventional multi-conductor power transmission line connects insulator devices (51), (51) to steel towers (50), (50), and connects the line-side yoke (52). , (52), each component conductor (53), (53) was stretched at a constant interval of about 400 to 5001 m, and this interval was maintained by a spacer (54). However, in order to stably transmit large amounts of power over long distances, each component conductor (
53), it has become clear that the line inductance caused by the current flowing through (53) should be minimized as much as possible, and recently the number of conductors per line has been increased,
Research is being conducted on high-efficiency power transmission lines that reduce inductance by increasing the spacing between conductors by 1,000 to 1,500 meters even though the number of conductors is the same. However, in order to increase the distance between each component conductor, the metal fittings of the insulator device, such as the ground side yoke and line side caulk, must be made larger, and the tower arm and the tower itself must also be made larger. There were problems such as not being able to use the equipment, and construction work such as transportation, assembly, and installation becoming difficult.
（発明が解決しようとする課題）
本発明は上記のような従来の問題を解決して、鉄塔や碍
子装置を大型化することなく線路インダクタンスを低下
させた高効率送電ができるようにした高効率送電線路及
びその架設装置を提供するために完成されたものである
。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides a highly efficient power transmission system that reduces line inductance without increasing the size of steel towers or insulator devices. It was completed to provide power transmission lines and their construction equipment.
（課題を解決するための手段）
上記の課題は、多導体送電線路の各構成導体の間隔を、
鉄塔に連結される碍子装置の近傍のみにおいて小さくし
、その他の部分において大きく拡開したことを特徴とす
るとする高効率送電線路によって達成される。(Means for solving the problem) The above problem is to improve the spacing between each constituent conductor of a multi-conductor power transmission line.
This is achieved by a highly efficient power transmission line that is characterized by being made smaller only in the vicinity of the insulator device connected to the steel tower, and widened in other parts.
また請求項１の高効率送電線路を架設するためのスペー
サに関する第２の発明は、多導体送電線路の各構成導体
の間隔を鉄塔に連結される碍子装置の近傍に向かって小
さくする位置に設けられるスペーサであって、スペーサ
の腕の先端に各構成導体を屈曲状態で支持する屈曲クラ
ンプを遊動自在に設けたことを特徴とするものである。Further, a second invention relating to a spacer for constructing a high-efficiency power transmission line according to claim 1 is provided at a position where the interval between each component conductor of the multi-conductor power transmission line becomes smaller toward the vicinity of an insulator device connected to a steel tower. This spacer is characterized in that a bending clamp for supporting each component conductor in a bent state is freely provided at the tip of an arm of the spacer.
また同じく請求項１の高効率送電線路を架設するための
宙乗機に関する第３の発明は、多導体送電線路の各構成
導体に懸垂確保される腕に連結された吊り具とこの吊り
具から懸垂される座席とを有し、前記腕が伸張収縮自在
に構成されていることを特徴とするものであり、拡張機
に関する第４の発明は、多導体送電線路の各構成導体に
懸架される腕がターンバックル又は油圧シリンダにより
伸張収縮可能に構成されていることを特徴とするもので
ある。Also, a third invention relating to a spacecraft for constructing a high-efficiency power transmission line according to claim 1 is provided by a hanging device connected to an arm suspended from each constituent conductor of a multi-conductor power transmission line, and a hanging device connected to this hanging device. A fourth invention related to an expansion machine is characterized in that the expansion machine has a suspended seat, and the arms are configured to be able to expand and contract freely. It is characterized in that the arms are configured to be extendable and retractable using turnbuckles or hydraulic cylinders.
（実施例） 次に各発明を実施例とともに詳細に説明する。(Example) Next, each invention will be described in detail along with examples.
第１図は第１の発明の実施例を示すもので、ｆｉ＋は鉄
塔、（２）はそのアーム部（３）に連結された碍子装置
、（４）、（４）は多導体送電線路の各構成導体である
。各構成導体（４）、（４）は図示のように相互の間隔
を大きく拡開した状態でスペーサ（５）により支えられ
て線路インダクタンスを低減させているが、碍子装置（
２）の近傍のみにおいてはその間隔を小さくしである。FIG. 1 shows an embodiment of the first invention, in which fi+ is a steel tower, (2) is an insulator device connected to its arm (3), and (4) is a multi-conductor transmission line. Each constituent conductor. As shown in the figure, each component conductor (4) is supported by a spacer (5) with the distance between them greatly expanded to reduce the line inductance, but the insulator device (
The interval should be reduced only in the vicinity of 2).
このためアース側ヨーク（６）、碍子装置（２）ライン
側ヨーク（７）等の金具類は従来と同一または同程度の
大きさのものを用いることができる。For this reason, the metal fittings such as the earth side yoke (6), the insulator device (2), and the line side yoke (7) can be the same or comparable in size to conventional ones.
このように第１の発明においては多導体送電線路の各構
成導体（４）、（４）の間隔をスペーサ（５）により大
きく拡開したので線路インダクタンスを小さくすること
ができ、効率良くしかも安定した送電ができるとともに
、従来の多導体送電線路とは異なり碍子袋Ｎ（２）の近
傍のみにおいて間隔を小さくしたので金具類、碍子装置
（２）、鉄塔（１）等を従来と同一サイズのまま使用で
きる利点がある。In this way, in the first invention, the distance between the constituent conductors (4), (4) of the multi-conductor power transmission line is greatly expanded by the spacer (5), so the line inductance can be reduced, making it efficient and stable. In addition, unlike conventional multi-conductor transmission lines, the spacing is reduced only near the insulator bag N (2), so metal fittings, insulator devices (2), steel towers (1), etc. can be made of the same size as before. It has the advantage of being able to be used as is.
第２図〜第４図は第２の発明のスペーサの実施さを示す
もので、このスペーサは各構成導体（４）の間隔を碍子
装置（２）の近傍において小さくする箇所に設けられる
ものである。スペーサは基体００）から張出した腕００
の先端に連結金具的を介して屈曲クランプ（＋３１を遊
動自在に設けたものである。屈曲クランプ０３１は第３
図に示されるように構成導体（４）を円滑に屈曲した状
態としてクランプすることができ、構成導体（４）はこ
のスペーサの部分で屈曲して相互の間隔を小さくするこ
とができる。このように本発明のスペーサは屈曲クラン
プ０３）を腕αυの先端に遊動自在に設けたから、各構
成導体（４）が風圧を受けた場合にはこの屈曲クランプ
α（至）が適宜遊動して各構成導体（４）を保護すると
ともに、このスペーサと碍子袋Ｗ（２）との間に形成さ
れる構成導体（４）からなる籠状体の変形に追随するこ
とができる。Figures 2 to 4 show the implementation of the spacer of the second invention, and this spacer is provided at a location where the distance between each component conductor (4) is reduced near the insulator device (2). be. The spacer is an arm 00 extending from the base 00)
A bending clamp (+31) is freely movably provided at the tip of the connecting metal fitting.The bending clamp 031 is attached to the third
As shown in the figure, the constituent conductors (4) can be clamped in a smoothly bent state, and the constituent conductors (4) can be bent at this spacer portion to reduce the mutual distance. In this way, in the spacer of the present invention, the bending clamp 03) is freely movable at the tip of the arm αυ, so when each component conductor (4) receives wind pressure, the bending clamp α (to) moves appropriately. It is possible to protect each of the constituent conductors (4) and to follow the deformation of the cage-like body made of the constituent conductors (4) formed between this spacer and the insulator bag W(2).
なおこのスペーサの腕ａυは構成導体（４）のカテナリ
ー角により微調整を必要とするときがあるので、第４図
に示すように複数個の孔α旬を有する一枚のリンク状の
腕ａ５１を２枚のクレビス状の腕０６）の先端に取付け
、長さ調整ができるようにしておくことが好ましい。Note that the arm aυ of this spacer may require fine adjustment depending on the catenary angle of the constituent conductor (4), so as shown in FIG. It is preferable to attach it to the tips of two clevis-like arms 06) so that the length can be adjusted.
第５図〜第６図は第３の発明の実施例を示す。5 and 6 show an embodiment of the third invention.
第３の発明の宙乗機は、多導体送電線路の各構成導体間
の間隔を拡大するとともにスペーサ（５）を取付ける作
業を行うために用いられるものであって、各構成導体（
４）に懸垂確保される腕Ｉ２ノと、これに連結された枠
状の吊り具（２１）と、この吊り具（２１）から懸垂さ
れる座席（２２）とを有している。第５図の例では、各
腕Ｑωは油圧シリンダ（２３）を備え、座席（２２）に
設けられた手動ポンプ（２４）付の油圧ユニソ） （２
５）から油圧ホース（２６）を介して圧力油を供給する
ことにより、自由に伸張収縮することができる構造とな
っている。なお各腕ｌ２ｅｌの先端にはローラなどの懸
架部（２７）を設けるほか、図示を略した制動器等も設
けである。The spacecraft of the third invention is used to expand the distance between each component conductor of a multi-conductor power transmission line and to attach a spacer (5),
4), a frame-shaped hanger (21) connected to the arm I2, and a seat (22) suspended from the hanger (21). In the example shown in FIG. 5, each arm Qω is equipped with a hydraulic cylinder (23), and a hydraulic unit (2) with a manual pump (24) installed on the seat (22).
By supplying pressure oil from 5) through a hydraulic hose (26), the structure is such that it can be freely expanded and contracted. In addition to providing a suspension portion (27) such as a roller at the tip of each arm l2el, a brake device (not shown) is also provided.
このような宙乗機は各腕ｔ２ＩＩ）の先端の懸架部（２
７）を多導体送電線路の各構成導体（４）に懸架させ、
架設作業者が座席（２２）に搭乗して所定の位置まで進
んだうえで油圧ユニット（２５）により各腕Ｑのを伸張
させ、容易に各構成導体（４）、（４）の間隔を拡開す
ることができ、また同時にスペーサ（５）を取付けるこ
とができる。また作業開始時及び作業終了時には腕を収
縮させれば、従来の宙乗機と変るところなく懸架あるい
は離脱させることができる。なお第６図は各腕（２のを
ターンバックル（２８）によって伸張収縮するようにし
たものであるが、その他の点は第５図のものと変るとこ
ろはない。Such a spacecraft has a suspension part (2) at the tip of each arm (t2II).
7) is suspended on each constituent conductor (4) of the multi-conductor power transmission line,
After the construction worker gets on the seat (22) and advances to the designated position, he extends each arm Q using the hydraulic unit (25) and easily widens the distance between each component conductor (4). It can be opened and the spacer (5) can be attached at the same time. Furthermore, by contracting the arms at the start and end of work, it can be suspended or disengaged in the same way as conventional spacecraft. In addition, in FIG. 6, each arm (2) is extended and contracted by a turnbuckle (28), but other points are the same as in FIG. 5.
第７図〜第９図は第４の発明の導体間隔拡張機の実施例
を示したものである。第７図に示されるものは枠状の吊
り具（３１）の周囲に各構成導体（４）に懸架される腕
（３０）を設けるとともに、各腕（３０）に油圧シリン
ダ（３２）を取付けて伸張収縮させるようにしたもので
ある。このような拡張機は作業者が乗り込むものではな
いために油圧ホース（３３）を介して接続される油圧ユ
ニット（３４）は鉄塔上に置かれ、作業者が碍子装置（
２）の前方の多導体送電線路へ出て拡張機を取付け、腕
（３０）を伸張させて各構成導体（４）の間隔を拡開さ
せたうえで従来の宙乗機によってスペーサ（５）の取付
けを行う。7 to 9 show an embodiment of the conductor spacing expander according to the fourth invention. The one shown in Fig. 7 has an arm (30) suspended around each component conductor (4) around a frame-shaped hanging device (31), and a hydraulic cylinder (32) is attached to each arm (30). It is designed to be expanded and contracted. Since such an expansion machine is not something that a worker rides on, the hydraulic unit (34) connected via a hydraulic hose (33) is placed on a steel tower, and the worker does not ride the insulator device (
Go out to the multi-conductor power transmission line in front of 2) and install the extender, extend the arm (30) to widen the spacing between each constituent conductor (4), and then use a conventional spacecraft to install the spacer (5). Perform the installation.
なお第８図に示されるものは２本の構成導体（４）、（
４）の間隔拡張機であり、４導体の場合には対角線上の
２本ずつの構成導体（４）、（４）の拡開を順次行う方
法で使用される。この場合には油圧シリンダ（３２）を
−基だけ設ければよい。更に第９図に示されるものは各
腕（３０）の伸張収縮をターンバックル（３５）により
行わせるようにしたものである。The one shown in Fig. 8 has two constituent conductors (4), (
4), and in the case of four conductors, it is used to sequentially expand two constituent conductors (4), (4) on the diagonal. In this case, only one hydraulic cylinder (32) may be provided. Furthermore, in the one shown in FIG. 9, each arm (30) is extended and contracted by a turnbuckle (35).
（発明の効果）
以上に詳述したように、第１図の発明の高効率送電線路
は鉄塔や金具、碍子装置等を大型化することなく各構成
導体の間隔を拡開し、線路インダクタンスを低下させて
大電力を高効率で送電できるようにしたものである。(Effects of the Invention) As detailed above, the high-efficiency power transmission line of the invention shown in Figure 1 expands the spacing between each component conductor without increasing the size of the tower, metal fittings, insulator device, etc., and reduces line inductance. This makes it possible to transmit large amounts of power with high efficiency.
また第２の発明のスペーサを用いればこのような高効率
送電線路の架設に便利であり、風圧等から各構成導体を
保護することができ為。更にまた第３の発明の宙乗機や
第４の発明の導体間隔拡張機を用いれば、このような高
効率送電線路を容易に架設することが可能となるうえ、
これらの装置自体の運搬や鉄塔上への持上げも比較的簡
単に行える利点がある。よって本発明は従来の問題点を
一掃した高効率送電線路及びその架設装置として、産業
の発展に寄与するところは極めて大きいものである。Further, if the spacer of the second invention is used, it is convenient for constructing such a high-efficiency power transmission line, and each constituent conductor can be protected from wind pressure and the like. Furthermore, by using the spacecraft of the third invention and the conductor spacing expander of the fourth invention, it becomes possible to easily construct such a high-efficiency power transmission line, and
These devices have the advantage of being relatively easy to transport and lift onto a steel tower. Therefore, the present invention greatly contributes to the development of industry as a highly efficient power transmission line and its installation device that eliminates the problems of the conventional lines.
第１図は第１の発明の高効率送電線路を示す側面図、第
２図は第２の発明の実施例を示す正面図、第３図はその
要部の側面図、第４図はその変形例を示す側面図、第５
図は第３の発明の第１の実施例を示す正面図、第６図は
その第２の実施例を示す正面図、第７図は第４の発明の
第１の実施例を示す正面図、第８図はその第２の実施例
を示す正面図、第９図はその第３の実施例を示す正面図
、第１０図は従来の送電線路を示す側面図である。
（１）；鉄塔、（２）：碍子装置、（４）：構成導体、
ＯＤ：腕、０３１：屈曲クランプ、Ｑの：腕、（２１）
：吊り具、（２２） ：座席、（３０） ：腕、（３
２） ：油圧シリンダ、（３５） ：ターンバックル。
第
図
第
図
第
図
第
図
第
図
第
図Figure 1 is a side view showing a high-efficiency power transmission line according to the first invention, Figure 2 is a front view showing an embodiment of the second invention, Figure 3 is a side view of its main parts, and Figure 4 is its Side view showing a modification, fifth
The figure is a front view showing the first embodiment of the third invention, FIG. 6 is a front view showing the second embodiment, and FIG. 7 is a front view showing the first embodiment of the fourth invention. , FIG. 8 is a front view showing the second embodiment, FIG. 9 is a front view showing the third embodiment, and FIG. 10 is a side view showing a conventional power transmission line. (1): Steel tower, (2): Insulator device, (4): Constituent conductor,
OD: Arm, 031: Flexion clamp, Q: Arm, (21)
: Sling, (22) : Seat, (30) : Arm, (3
2) : Hydraulic cylinder, (35) : Turnbuckle. fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig.
Claims (1)
を、鉄塔（１）に連結される碍子装置（２）の近傍のみ
において小さくし、その他の部分において大きく拡開し
たことを特徴とする高効率送電線路。 ２、多導体送電線路の各構成導体（４）、（４）の間隔
を鉄塔に連結される碍子装置（２）の近傍に向かって小
さくする位置に設けられるスペーサであって、スペーサ
の腕（１１）の先端に各構成導体（４）を屈曲状態で支
持する屈曲クランプ（１３）を遊動自在に設けたことを
特徴とする高効率送電線路架設用のスペーサ。 ３、多導体送電線路の各構成導体（４）に懸垂確保され
る腕（２０）に連結された吊り具（２１）とこの吊り具
（２１）から懸垂される座席（２２）とを有し、前記腕
（２０）が伸張収縮自在に構成されていることを特徴と
する高効率送電線路架設用の宙乗機。 ４、多導体送電線路の各構成導体（４）に懸架される腕
（３０）がターンバックル（３５）又は油圧シリンダ（
３２）により伸張収縮可能に構成されていることを特徴
とする高効率送電線路架設用の導体間隔拡張機。[Claims] 1. The distance between the constituent conductors (4), (4) of the multi-conductor power transmission line is reduced only in the vicinity of the insulator device (2) connected to the steel tower (1), and in other parts A high-efficiency power transmission line characterized by its wide expansion. 2. A spacer provided at a position where the distance between each component conductor (4), (4) of a multi-conductor power transmission line becomes smaller toward the vicinity of the insulator device (2) connected to the steel tower, and the spacer arm ( 11) A spacer for installing a high-efficiency power transmission line, characterized in that a bending clamp (13) for supporting each component conductor (4) in a bent state is freely provided at the tip of the spacer. 3. It has a sling (21) connected to an arm (20) suspended from each constituent conductor (4) of the multi-conductor power transmission line, and a seat (22) suspended from this sling (21). A space riding machine for constructing a highly efficient power transmission line, characterized in that the arm (20) is configured to be expandable and retractable. 4. The arm (30) suspended from each component conductor (4) of the multi-conductor power transmission line is attached to a turnbuckle (35) or a hydraulic cylinder (
32) A conductor spacing expander for constructing a high-efficiency power transmission line, characterized in that it is configured to be expandable and retractable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26777388A JP2730742B2 (en) | 1988-10-24 | 1988-10-24 | Construction device and high-efficiency transmission line using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26777388A JP2730742B2 (en) | 1988-10-24 | 1988-10-24 | Construction device and high-efficiency transmission line using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02114814A true JPH02114814A (en) | 1990-04-26 |
| JP2730742B2 JP2730742B2 (en) | 1998-03-25 |
Family
ID=17449385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26777388A Expired - Fee Related JP2730742B2 (en) | 1988-10-24 | 1988-10-24 | Construction device and high-efficiency transmission line using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730742B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090319235A1 (en) * | 2008-04-17 | 2009-12-24 | Maclean-Fogg Company | Fiberglass Cross Arm And Method Of Selecting Same |
| CN102923600A (en) * | 2012-11-15 | 2013-02-13 | 河北省送变电公司 | Reverse pulley fixing device |
| CN103618253A (en) * | 2013-11-29 | 2014-03-05 | 国家电网公司 | Steering combination device for iron tower operation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4213088Y1 (en) * | 1964-11-11 | 1967-07-25 | ||
| JPS5226486A (en) * | 1975-08-23 | 1977-02-28 | Sumitomo Electric Ind Ltd | Abnormal vibration safeguard for multiconductor overhead transmission cable |
| JPS57195329U (en) * | 1981-06-05 | 1982-12-10 |
-
1988
- 1988-10-24 JP JP26777388A patent/JP2730742B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4213088Y1 (en) * | 1964-11-11 | 1967-07-25 | ||
| JPS5226486A (en) * | 1975-08-23 | 1977-02-28 | Sumitomo Electric Ind Ltd | Abnormal vibration safeguard for multiconductor overhead transmission cable |
| JPS57195329U (en) * | 1981-06-05 | 1982-12-10 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090319235A1 (en) * | 2008-04-17 | 2009-12-24 | Maclean-Fogg Company | Fiberglass Cross Arm And Method Of Selecting Same |
| CN102923600A (en) * | 2012-11-15 | 2013-02-13 | 河北省送变电公司 | Reverse pulley fixing device |
| CN102923600B (en) * | 2012-11-15 | 2014-09-17 | 河北省送变电公司 | Reverse pulley fixing device |
| CN103618253A (en) * | 2013-11-29 | 2014-03-05 | 国家电网公司 | Steering combination device for iron tower operation |
| CN103618253B (en) * | 2013-11-29 | 2016-07-06 | 国网辽宁省电力有限公司朝阳供电公司 | Iron tower operation turns to combination unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2730742B2 (en) | 1998-03-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |