JPH0830390B2 - Method for reducing ground resistance of hollow cylinder - Google Patents
Method for reducing ground resistance of hollow cylinderInfo
- Publication number
- JPH0830390B2 JPH0830390B2 JP63234504A JP23450488A JPH0830390B2 JP H0830390 B2 JPH0830390 B2 JP H0830390B2 JP 63234504 A JP63234504 A JP 63234504A JP 23450488 A JP23450488 A JP 23450488A JP H0830390 B2 JPH0830390 B2 JP H0830390B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow
- concrete
- reducing
- wall surface
- columnar body
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 16
- 239000004567 concrete Substances 0.000 claims description 18
- 229920000642 polymer Polymers 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 229910021487 silica fume Inorganic materials 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims 2
- 239000004020 conductor Substances 0.000 description 7
- 229920001940 conductive polymer Polymers 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、中空柱体の接地抵抗低減方法に関し、更に
詳しくは、特殊なコンクリートによって構成された中空
柱体の接地抵抗を低減して避雷器接地線のサージ・イン
ピーダンスの低減を図る中空柱体の接地抵抗低減方法に
関するものである。Description: TECHNICAL FIELD The present invention relates to a method for reducing the earth resistance of a hollow pillar, and more specifically, to a lightning arrester by reducing the earth resistance of a hollow pillar made of special concrete. The present invention relates to a method for reducing the ground resistance of a hollow column for reducing the surge impedance of the ground wire.
従来、架空電線支持用として、遠心力鉄筋コンクリー
ト柱（以下コンクリート柱と略称する）が大量に用いら
れる。そして、こうした架空電線支持用としての所謂電
柱は、絶縁機能が要求されることは勿論ながら雷撃或い
は開閉サージ等の影響を低減するための適切な接地抵抗
を持たなければならないことが知られている。Conventionally, a large amount of centrifugal reinforced concrete columns (hereinafter abbreviated as concrete columns) are used for supporting overhead cables. It is known that such a so-called utility pole for supporting an overhead wire is required to have an insulating function, but also to have an appropriate ground resistance for reducing the influence of lightning strike or switching surge. .
こうした要求を達成するために、現在、材質として、
例えば銅を用いた導電体構造を採用することによって低
サージ・インピーダンス化を図っており、その具体的方
法としては、接地線を帯状にするためにビニール絶縁テ
ープ電線（厚み0.15mm×幅40mm）をコンクリート柱外部
の表面に垂直に這わせることによって行っているのであ
る。In order to achieve these requirements, currently, as a material,
For example, by adopting a conductor structure using copper, we are aiming for low surge impedance, and as a concrete method, vinyl insulation tape electric wire (thickness 0.15 mm × width 40 mm) for banding the ground wire. Is made by crawling vertically on the surface of the concrete column.
しかしながら、この方法は接地線を電柱に固着させる
ためのバンド掛けが必要であると共に、地上から所定の
高さまで接地線にカバーを設けて接地線を保護しなけれ
ばならず、かつ接地線が電柱の表面の外部に露出してい
るので、断線する可能性が大きく、外観も不体裁となる
問題があった。However, this method requires banding to fix the grounding wire to the utility pole, and the grounding wire must be protected from the ground to a predetermined height to protect the grounding wire. Since it is exposed to the outside of the surface, there is a high possibility that the wire will be broken and the appearance will be unstructured.
また、この方法では、急峻波の襲来頻度に対して未だ
不十分な低サージ・インピーダンスであった。そのた
め、新しい導電材料の開発に伴って更に低サージ・イン
ピーダンス化を図らねばならないという要求があった。Moreover, in this method, the low surge impedance was still insufficient for the frequency of the steep waves. Therefore, with the development of new conductive materials, there has been a demand for further reduction of surge impedance.
尚、低サージ・インピーダンスの定量的な実験による
文献として、雑誌「電気評論:1985.8 耐雷対策工事
頁32〜39」を参考に挙げておく。In addition, as a reference by quantitative experiment of low surge impedance, the magazine "Electrical Review: 1985.8 Lightning protection work
See pages 32 to 39 for reference.
本発明は、このような問題を解決することを課題とし
て開発されたもので、中空柱体内に小型噴霧器を入れて
内壁面を利用して導電材を容易に吹きつけることがで
き、低サージ・インピーダンス化を図る中空柱体の接地
抵抗低減方法を提供することを目的とするものである。The present invention was developed with the object of solving such problems, and it is possible to easily spray a conductive material by using a small atomizer in a hollow column body and utilizing an inner wall surface, thereby reducing a surge. It is an object of the present invention to provide a method for reducing the grounding resistance of a hollow columnar body that achieves impedance.
上記の課題を解決し、その目的を達成する手段して、
本発明ではポルトランドセメントを主材として重量比で
10〜20％のシリカフュームを内割で混入したコンクリー
トにより中空柱体を構成し、この中空柱体内に炭素繊維
系の導電液化ポリマーの入った小型噴霧器を内壁面に沿
って挿入噴霧することを特徴とする中空柱体の接地抵抗
低減方法を開発し、採用した。As a means to solve the above problems and achieve the purpose,
In the present invention, Portland cement is used as the main material in a weight ratio.
The hollow column is made of concrete mixed with 10-20% silica fume in the interior ratio, and a small atomizer containing carbon fiber-based conductive liquid polymer is inserted and sprayed along the inner wall surface in the hollow column. We have developed and adopted a method for reducing the ground resistance of hollow columns.
また、本発明は上記のように構成した中空柱体の接地
抵抗低減方法において、前記小型噴霧器による液化ポリ
マーの噴霧は実質的に0.5mmの厚みに塗布され、その
後、70〜85℃で乾燥養生する中空柱体の接地抵抗低減方
法を開発し、採用した。Further, the present invention, in the method for reducing the ground resistance of the hollow column body configured as described above, the spray of the liquefied polymer by the small sprayer is applied to a thickness of substantially 0.5 mm, and then dried and cured at 70 to 85 ° C. We have developed and adopted a method for reducing the ground resistance of hollow pillars.
上記のように、コンクリート柱は、材料節減のため、
曲げ強さを高めるために円筒中空柱体とするのが普通で
ある。本発明では、この中空柱体の内壁面を利用して導
電性高分子を塗布して低サージ・インピーダンス化を実
現したものであるる。As mentioned above, concrete columns are
In order to increase bending strength, it is usually a cylindrical hollow column. In the present invention, a conductive polymer is applied to the inner wall surface of the hollow column to realize a low surge impedance.
上記導電材料としては、最近開発されている絶縁性高
分子に導電性フィラーであるアルミ繊維、スチール繊
維、炭素繊維、黒鉛等を複合化して導電性を付与したも
の、或いは、高分子構造体自体有機物でありながら極め
て高導電率（単位記号Ｓcm-1）を示し、且つ、実際には
共役系、即ち高分子主鎖が二重結合と一重結合が交互に
繰返すという構造のものがある。また、導電率を高める
ために適当な「ドーパント」とよばれる不純物を積極的
に添加することもある。As the conductive material, a recently developed insulating polymer compounded with conductive filler such as aluminum fiber, steel fiber, carbon fiber or graphite to impart conductivity, or the polymer structure itself Although it is an organic substance, it has extremely high conductivity (unit symbol Scm −1 ), and in reality, there is a conjugated system, that is, a polymer main chain having a structure in which double bonds and single bonds are alternately repeated. In addition, an impurity called a suitable "dopant" may be positively added to increase the conductivity.
尚、導電性高分子の原理とその例として、「吉野勝
美：電気学会雑誌 1985.11」を参考に挙げておく。Incidentally, "Katsumi Yoshino: The Institute of Electrical Engineers of Japan, 1985.11" will be cited as a reference for the principle and examples of the conductive polymer.
上記のように構成した本発明の中空柱体の接地抵抗低
減方法は、本来材料節約等の理由で中空とされるこの種
の柱体の既存の内壁面を利用して、この内壁面に炭素繊
維系の導電液化ポリマーを小型噴霧器によって塗布する
だけの簡単な方法を採用するだけで、柱体の接地抵抗の
低減を得ることができるのである。The method for reducing the grounding resistance of the hollow columnar body of the present invention configured as described above uses the existing inner wall surface of this type of columnar body which is originally made hollow for reasons such as material saving, and carbon is used as the inner wall surface. It is possible to obtain a reduction in the ground resistance of the column simply by adopting a simple method in which the fiber-based conductive liquefied polymer is applied by a small sprayer.
また、ポルトランドセメントを主材として重量比で10
〜20％のシリカフュームを内割で混入したコンクリート
で柱体を構成しているので、その中空内壁面を平滑に形
成できて、前記導電液化ポリマーの塗布が容易となり、
均一厚さに塗布できるものである。The weight ratio of Portland cement to 10%
Since the pillar is made of concrete mixed with ~ 20% silica fume in the interior ratio, its hollow inner wall surface can be formed smoothly, and the application of the conductive liquefied polymer becomes easy,
It can be applied to a uniform thickness.
以下、本発明の一実施例を図面に基づき説明する。中
空柱体として、第１図及び第２図に示すように、小型コ
ンクリート柱体を作成した。この柱体２は、内壁面を平
滑に仕上げるべく、ポルトランドセメントを主材として
重量比で15％のシリカフューム（フェロシリコンを製造
するとき発生するシリカガスを集塵したもので、SiO2が
93〜98％、比表面積約20万cm2/g;タバコの煙が10万cm2/
g）を内割で混入した生コンクリートを用いて遠心力を
応用した装置によって製造した。これによって、従来の
コンクリート中空体の内壁面の仕上がりよりも平滑性に
優れたものが得られた。An embodiment of the present invention will be described below with reference to the drawings. As a hollow columnar body, a small concrete columnar body was prepared as shown in FIGS. 1 and 2. The columnar body 2, to the inner wall surface smooth finish, obtained by dust collecting a Shirikagasu generated when producing 15% of silica fume (ferrosilicon in a weight ratio of Portland cement as a main material, SiO 2 is
93 to 98%, a specific surface area of about 200,000 cm 2 / g; cigarette smoke 100,000 cm 2 /
g) was produced by a device to which centrifugal force was applied, using ready-mixed concrete containing g). As a result, it was possible to obtain a concrete hollow body which was superior in smoothness to the finished inner wall surface.
この成形おいては、型枠に入っているコンクリートの
脱型強度が出るまで蒸気養生した後、型枠を除去した。In this molding, the mold was removed after steam curing until the concrete contained in the mold exhibited demolding strength.
尚、前記シリカフュームは、実験の結果約10〜20％の
重量比であれば充分に前述の平滑化の目的を達すること
が分かっている。As a result of experiments, it has been found that the above-mentioned silica fume can sufficiently attain the above-mentioned purpose of smoothing at a weight ratio of about 10 to 20%.
３は、鉄筋であって、強度を上げるためコンクリート
柱体２の軸方向に沿って伸びるように、周方向に複数本
配置されている。前記鉄筋３は、この実施例ではPC鋼線
を籠状に構成したものを用いている。そして、この鉄筋
３にコンデンサー結合してサージ・インピーダンスを低
くする相乗効果に利用できるようにしている。Reference numeral 3 is a reinforcing bar, and a plurality of reinforcing bars 3 are arranged in the circumferential direction so as to extend along the axial direction of the concrete columnar body 2 in order to increase the strength. In this embodiment, the rebar 3 is made of PC steel wire in a cage shape. The reinforcing bar 3 is connected to a capacitor so that it can be used for the synergistic effect of reducing the surge impedance.
１は、導電材料であり、前記コンクリート柱体２の内
壁面に設けられている。この導電材料１は、導電性ポリ
マーを用いており、炭素繊維系の導電液化ポリマーを小
型噴霧器に入れて、この小型噴霧器を前記コンクリート
柱体２の内壁面に沿って挿入し、そのノズルの先からま
んべんなく噴霧させ、約0.5mmの厚みに塗布した。その
後、このコンクリート柱体２の両端を蓋して70〜85℃で
約１時間乾燥養生し、以て、固形化したシート状の導電
材料１を内壁面に付設したのである。この導電性ポリマ
ーシートの導電率は、約102Ｓcm-1（単位記号Ｓcm-1）
である。Reference numeral 1 denotes a conductive material, which is provided on the inner wall surface of the concrete pillar 2. This conductive material 1 uses a conductive polymer. A carbon fiber-based conductive liquefied polymer is put in a small sprayer, and this small sprayer is inserted along the inner wall surface of the concrete pillar 2, and the tip of the nozzle is inserted. It was evenly sprayed and applied to a thickness of about 0.5 mm. After that, both ends of the concrete columnar body 2 were covered and dried and cured at 70 to 85 ° C. for about 1 hour, so that the solidified sheet-shaped conductive material 1 was attached to the inner wall surface. The conductivity of this conductive polymer sheet is about 10 2 Scm -1 (unit symbol Scm -1 )
Is.
以上のように本発明の中空柱体の接地抵抗低減方法
は、ポルトランドセメントを主材として重量比で10〜20
％のシリカフュームを内割で混入したコンクリートによ
り中空柱体を構成し、この中空柱体の内に炭素繊維系の
導電液化ポリマーの入った小型噴霧器を内壁面に沿って
挿入噴霧することを特徴とするものであるから、中空壁
面が平滑面になり、小型噴霧器により導電液化ポリマー
を自動的に容易に吹きつけ塗着でき、しかも均一厚さに
塗布できて低サージ・インピーダンス化が図れて中空柱
体の接地抵抗低減が得られるものである。As described above, the method for reducing the grounding resistance of the hollow columnar body of the present invention is carried out with Portland cement as the main material in a weight ratio of 10 to 20.
% Of silica fume is mixed in the interior of the hollow column to form a hollow column, and a small atomizer containing carbon fiber-based conductive liquefied polymer is inserted and sprayed along the inner wall surface of the hollow column. Since the hollow wall surface is smooth, the conductive liquefied polymer can be automatically and easily sprayed and applied by a small sprayer, and it can be applied to a uniform thickness to achieve low surge and impedance. The ground resistance of the body can be reduced.
図面は、本発明にかかる中空柱体の一実施例を示し、第
１図は、要部の縦断側面図、第２図は、第１図のＡ−Ａ
線矢視断面図である。The drawings show one embodiment of the hollow columnar body according to the present invention. FIG. 1 is a vertical sectional side view of a main portion, and FIG. 2 is A-A of FIG.
FIG.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 奥 清司 兵庫県尼崎市若王寺３丁目11番20号 関西 電力株式会社総合技術研究所内 (72)発明者 吉野 勝美 大阪府岸和田市尾生町166番３号 (72)発明者 金子 武 大阪府大阪市北区西天満５丁目14番10号 近畿コンクリート工業株式会社内 (72)発明者 中口 啓 大阪府大阪市北区西天満５丁目14番10号 近畿コンクリート工業株式会社内 (56)参考文献 特開 昭62−7654（ＪＰ，Ａ) 特開 昭62−41783（ＪＰ，Ａ) 特開 昭62−100468（ＪＰ，Ａ) 特開 昭63−8250（ＪＰ，Ａ) 実公 昭59−1375（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoji Oku 3-11-20 Wakaoji, Amagasaki City, Hyogo Prefecture Kansai Electric Power Co., Inc. Research Institute (72) Inventor Katsumi Yoshino 1663 Oyucho, Kishiwada City, Osaka Prefecture (72) Inventor Takeshi Kaneko 5-14-10 Nishi-Tenma, Kita-ku, Osaka City, Osaka Prefecture Kinki Concrete Industry Co., Ltd. (72) Kei Nakaguchi 5-14-10 Nishi-Tenma, Kita-ku, Osaka City, Osaka Prefecture Kinki Concrete Kogyo Co., Ltd. (56) Reference JP 62-7654 (JP, A) JP 62-41783 (JP, A) JP 62-100468 (JP, A) JP 63-8250 (JP , A) Sumiko Sho 59-1375 (JP, Y2)
Claims (2)
で10〜20％のシリカフュームを内割で混入したコンクリ
ートにより中空柱体を構成し、この中空柱体内に炭素繊
維系の導電液化ポリマーの入った小型噴霧器を内壁面に
沿って挿入噴霧することを特徴とする中空柱体の接地抵
抗低減方法。1. A hollow columnar body is made of concrete in which 10 to 20% by weight of silica fume is mixed with Portland cement as a main material in an inner ratio, and a carbon fiber-based electrically conductive liquefied polymer is contained in the hollow columnar body. A method for reducing grounding resistance of a hollow column, characterized by inserting and spraying a small sprayer along an inner wall surface.
は実質的に0.5mmの厚みに塗布され、その後、70〜85℃
で乾燥養生することを特徴とする請求項（１）に記載の
中空柱体の接地抵抗低減方法。2. The spraying of the liquefied polymer by the small sprayer is applied to a thickness of substantially 0.5 mm, and then 70 to 85 ° C.
The method for reducing grounding resistance of a hollow column according to claim 1, wherein the method is dry curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63234504A JPH0830390B2 (en) | 1988-09-19 | 1988-09-19 | Method for reducing ground resistance of hollow cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63234504A JPH0830390B2 (en) | 1988-09-19 | 1988-09-19 | Method for reducing ground resistance of hollow cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0282479A JPH0282479A (en) | 1990-03-23 |
| JPH0830390B2 true JPH0830390B2 (en) | 1996-03-27 |
Family
ID=16972066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63234504A Expired - Fee Related JPH0830390B2 (en) | 1988-09-19 | 1988-09-19 | Method for reducing ground resistance of hollow cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0830390B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591375U (en) * | 1982-06-28 | 1984-01-06 | セイコーエプソン株式会社 | small portable devices |
| JPS6036987U (en) * | 1983-08-20 | 1985-03-14 | マツダ株式会社 | cabin hanger |
| JPS627654A (en) * | 1985-07-03 | 1987-01-14 | 太平洋セメント株式会社 | Manufacture of centrifugally formed concrete product |
| JPH0669908B2 (en) * | 1985-08-14 | 1994-09-07 | 三菱マテリアル株式会社 | Raw material composition for inorganic lightweight extrusion molding |
| JPS62100468A (en) * | 1985-10-25 | 1987-05-09 | 五洋建設株式会社 | Cement composition for underwater construction |
| JPS638250A (en) * | 1986-06-24 | 1988-01-14 | 竹本油脂株式会社 | Superhigh strength concrete composition |
-
1988
- 1988-09-19 JP JP63234504A patent/JPH0830390B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0282479A (en) | 1990-03-23 |
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