JPH02237409A - Laying system for underground power cable - Google Patents
Laying system for underground power cableInfo
- Publication number
- JPH02237409A JPH02237409A JP1055871A JP5587189A JPH02237409A JP H02237409 A JPH02237409 A JP H02237409A JP 1055871 A JP1055871 A JP 1055871A JP 5587189 A JP5587189 A JP 5587189A JP H02237409 A JPH02237409 A JP H02237409A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- power cable
- water
- water pipe
- underground
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 16
- 239000004020 conductor Substances 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 4
- 238000009933 burial Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Electric Cable Installation (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、許容電流が向上された地中電力ケーブルの布
設方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an underground power cable installation system with improved permissible current.
（従来の技術）
従来から地中電力ケーブルの布設方式として、管路引入
れ方式およびトラフ直埋方式等が行われている。(Prior Art) Conventionally, methods for laying underground power cables include a conduit entry method and a direct trough burial method.
管路布設方式は、第３図に示すように、ケーブルの布設
管路１が設けられたアスベストセメントや鉄筋コンクリ
ート、あるいは鋼製の管２を地面３の下に埋設し、その
管路１内にＣ■ケーブルのような電力ケーブル４を引入
れて布設ずる方式であり、トラフ直埋方式は、第４図に
示すように、地面３の下に埋設されたコンクリートトラ
フまたは土管トラフ５内に、電力ケーブル４を引込み、
空隙部に砂６を充填する方式である。As shown in Fig. 3, the conduit installation method is to bury a pipe 2 made of asbestos cement, reinforced concrete, or steel under the ground 3, on which a cable installation conduit 1 is installed, and to install a cable inside the conduit 1. This is a method in which a power cable 4 such as a C-cable is brought in and laid.In the trough direct burial method, as shown in FIG. Pull in the power cable 4,
This method is to fill the void with sand 6.
一方、このように地下に埋設された地中ケーブルを含め
た電力ケーブルの許容電流を増大するために、従来から
、水やフロンのような冷却媒体を用いてケーブル導体を
冷却することが行われている。On the other hand, in order to increase the allowable current of power cables, including underground cables buried underground, cable conductors have traditionally been cooled using cooling media such as water or fluorocarbons. ing.
（発明が解決しようとする課題）
しかしながらこのような冷却方式は、内部に冷媒通路を
設けるなど、ケーブル自体を特殊な構造にしなければな
らないばかりでなく、冷媒循環設備等の大ががりな設備
を要する。(Problem to be solved by the invention) However, such a cooling method not only requires the cable itself to have a special structure, such as providing a refrigerant passage inside, but also requires extensive equipment such as refrigerant circulation equipment. It takes.
そのためケーブルの製造や付帯設備にコストがかかり、
長尺の線路などには採用することが難しいという問題が
あった。As a result, cable manufacturing and ancillary equipment costs more.
There was a problem that it was difficult to use it for long railway lines.
本発明はこのような問題を解決するためになされたもの
で、冷媒循環設備等の大がかりな設備を必要とせずにケ
ーブルの冷却が図られ、許容電流が増大された地中電力
ケーブルの布設方式を提供することを目的とする。The present invention has been made to solve these problems, and provides an underground power cable installation method that allows cable cooling without the need for large-scale equipment such as refrigerant circulation equipment, and increases allowable current. The purpose is to provide
［発明の構成］
（課題を解決するための手段）
本発明の地中電力ケーブルの布設方式は、地下に埋設さ
れた水道管の管体中に、長さ方向に複数の管路を設け、
これらの管路内に電力ケーブルを収納することを特徴と
している。[Structure of the Invention] (Means for Solving the Problems) The underground power cable installation method of the present invention includes providing a plurality of pipes in the length direction in the pipe body of a water pipe buried underground,
It is characterized by housing power cables within these conduits.
（作用）
本発明の布設方式においては、地下に埋設された水道管
内に地下水などの水が常に流されているので、その管壁
内部の管路内に収納された電力ケーブルの周りの温度は
、水温に近い温度に下げられる。(Function) In the installation method of the present invention, water such as groundwater is constantly flowing into the water pipes buried underground, so the temperature around the power cables housed in the pipes inside the pipe walls is low. , the temperature is lowered to close to water temperature.
そのためケーブルの許容電流の値は、従来の方式で地下
に布設されたケーブルに比べて、大幅に増大させること
ができる。Therefore, the permissible current value of the cable can be significantly increased compared to cables laid underground using conventional methods.
（実施例） 以下、本発明の実施例を図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図および第２図は、それぞれ本発明の地中電力ケー
ブルの布設方式の実施例を示す断面図である。FIG. 1 and FIG. 2 are sectional views each showing an embodiment of the underground power cable installation method of the present invention.
これらの図において符号７は、市街地等の地而８の下に
埋設されたコンクリート製の円筒状あるいは断面矩形の
水道管を示しており、その内部には家庭用の飲料水ある
いは工業用水などの水９が流されている。In these figures, the reference numeral 7 indicates a concrete cylindrical or rectangular cross-section water pipe that is buried under the ground 8 in urban areas, etc., and inside the pipe there is water for domestic drinking water or industrial water. Water 9 is flowing.
またこの水道管７の管壁内部には、複数の管路１０がそ
れぞれ長さ方向に沿って穿設されており、これらの管路
１０内にはそれぞれ１条または複数条の電力ケーブル１
１が収納されている。Furthermore, inside the wall of the water pipe 7, a plurality of conduits 10 are bored along the length direction, and each of these conduits 10 has one or more power cables 1.
1 is stored.
このように構成された地中電力ケーブルの布設方式にお
いては、水道管７内を流動する水９によって、常に電力
ケーブル１１の周囲の温度が下げられ導体が冷却されて
いるので、ケーブルの許容電流値が以下に示すように大
幅に増大される。In the underground power cable installation method configured in this way, the temperature around the power cable 11 is constantly lowered by the water 9 flowing in the water pipe 7 and the conductor is cooled, so that the permissible current of the cable is reduced. The value is increased significantly as shown below.
すなわちＣＶケーブルの場合を例にとると、ケ−ブル周
囲の温度が２５℃から２０℃に５℃下げられると、許容
電流の値は４％増大し、２５℃から１５℃に１０℃下げ
られると、許容電流値は７％増大する。In other words, taking the case of a CV cable as an example, if the temperature around the cable is lowered by 5 degrees Celsius from 25 degrees Celsius to 20 degrees Celsius, the allowable current value will increase by 4% and will be lowered by 10 degrees Celsius from 25 degrees Celsius to 15 degrees Celsius. , the allowable current value increases by 7%.
また管壁内部にケーブル布設管路１０が設けられた水道
管７は、数ｍの長さのものが工場で製作可能であり、こ
れを長さ方向に接続しながら埋設し管路１０内にケーブ
ル１１を引込むことによって、任意の長さのケーブル布
設路を形成することができる。Moreover, the water pipe 7 with the cable laying conduit 10 provided inside the pipe wall can be manufactured in a factory with a length of several meters, and it is buried in the conduit 10 while connecting it in the length direction. By pulling in the cable 11, a cable installation path of arbitrary length can be formed.
さらに水道管７の管壁がケーブル管路として利用されて
おり、別に布設スペースを設ける必要がないので、ケー
ブルの占有スペースおよび埋設工事費の低減を図ること
ができ、また特別な保守点検を必要としない。Furthermore, since the pipe wall of the water pipe 7 is used as a cable conduit, there is no need to provide a separate installation space, so the space occupied by the cable and the cost of burying the cable can be reduced, and special maintenance and inspection are not required. I don't.
またさらに水冷ケーブルやフロン冷却ケーブルなどの従
来の冷却ケーブルに比べて、ケーブル構造を変える必要
ガ｛ないばかりでなく、冷媒循環設備などの特殊な付帯
設備を必要としないので、コストがかからず経済的に有
利である。Furthermore, compared to conventional cooling cables such as water cooling cables and Freon cooling cables, there is no need to change the cable structure, and there is no need for special incidental equipment such as refrigerant circulation equipment, so it is less costly. Economically advantageous.
さらにケーブル自体が直接水道水に触れることがないの
で、絶縁体の水トリー等が生じるおそれがない。Furthermore, since the cable itself does not come into direct contact with tap water, there is no risk of water tree formation in the insulator.
［発明の効果〕
以上説明したように本発明の地中電力ケーブルの布設方
式によれば、特別な設備を必要とすることなくケーブル
の周囲温度を下げ、許容電流の増大を図ることができる
。[Effects of the Invention] As explained above, according to the underground power cable installation method of the present invention, the ambient temperature of the cable can be lowered and the allowable current can be increased without requiring special equipment.
また別にケーブルの布設スペースを必要としないので経
済的かつ効率的な布設方式といえる。Furthermore, since no separate cable installation space is required, it can be said to be an economical and efficient installation method.
第１図および第２図は、それぞれ本発明の地中電力ケー
ブルの布設方式の実施例を示す断面図、第３図および第
４図はそれぞれ従来の電カケーブルの布設方式を示す断
面図である。
７・・・・・・・・・水道管
９・・・・・・・・・水道水
１０・・・・・・・・・管路
第
図
第２図
第３
図
第４図1 and 2 are cross-sectional views showing an embodiment of the underground power cable installation method of the present invention, and FIGS. 3 and 4 are cross-sectional views showing the conventional power cable installation method, respectively. be. 7...Water pipe 9...Tap water 10...Pipe diagram Figure 2 Figure 3 Figure 4
Claims (1)
複数の管路を設け、これらの管路内に電力ケーブルを収
納することを特徴とする地中電力ケーブルの布設方式。(1) An underground power cable installation method characterized by providing a plurality of pipes in the length direction in the pipe body of a water pipe buried underground, and storing power cables within these pipes. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055871A JPH02237409A (en) | 1989-03-08 | 1989-03-08 | Laying system for underground power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055871A JPH02237409A (en) | 1989-03-08 | 1989-03-08 | Laying system for underground power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02237409A true JPH02237409A (en) | 1990-09-20 |
Family
ID=13011152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1055871A Pending JPH02237409A (en) | 1989-03-08 | 1989-03-08 | Laying system for underground power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02237409A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332240A (en) * | 2014-11-17 | 2015-02-04 | 武汉理工大学 | Method for improving carrying capacity of power cable directly buried in soil |
| CN112949012A (en) * | 2021-03-24 | 2021-06-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Method and system for reducing thermal resistance of surrounding soil and improving cable transmission capacity |
-
1989
- 1989-03-08 JP JP1055871A patent/JPH02237409A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332240A (en) * | 2014-11-17 | 2015-02-04 | 武汉理工大学 | Method for improving carrying capacity of power cable directly buried in soil |
| CN112949012A (en) * | 2021-03-24 | 2021-06-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Method and system for reducing thermal resistance of surrounding soil and improving cable transmission capacity |
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