JPH03253213A - Method for forming joint of power cable - Google Patents
Method for forming joint of power cableInfo
- Publication number
- JPH03253213A JPH03253213A JP2049919A JP4991990A JPH03253213A JP H03253213 A JPH03253213 A JP H03253213A JP 2049919 A JP2049919 A JP 2049919A JP 4991990 A JP4991990 A JP 4991990A JP H03253213 A JPH03253213 A JP H03253213A
- Authority
- JP
- Japan
- Prior art keywords
- jig
- cable
- inner diameter
- power cable
- parts
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は例えば架橋ポリエチレン絶縁型カケープルの如
きプラスチック電力ケーブル等のプレハブ型接続部の形
成方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of forming prefabricated connections for plastic power cables, such as cross-linked polyethylene insulated cables.
（従来の技術）
第１図はプラスチック電力ケーブルのプレハブ型接続部
の要部の縦断面図である。図面に示すように、例えば架
橋ポリエチレン絶縁型カケープルの如きプラスチック電
力ケーブル（ｌＯ）の導体（１１）接続部（１）を内包
し、両方のケーブル絶縁層（１２）に跨って、例えばエ
チレン・プロピレンゴム等で形成した絶縁筒（２）がそ
の弾性力によりケーブル絶縁層（１２）の外表面に密着
して設けられている。(Prior Art) FIG. 1 is a longitudinal cross-sectional view of the main parts of a prefabricated connection part of a plastic power cable. As shown in the drawing, a conductor (11) of a plastic power cable (10), for example a cross-linked polyethylene insulated cable, encloses the connection part (1) and spans both cable insulation layers (12), for example an ethylene propylene insulated cable. An insulating tube (2) made of rubber or the like is provided in close contact with the outer surface of the cable insulating layer (12) due to its elasticity.
このようなケーブル接続部の形成は、絶縁筒（２）の内
部に、ケーブル絶縁層（１２）の外径より大きな内径を
もった内径拡大用治具（３）を挿通した構成体を、第２
図（イ）のように、あらかじめ一方のケーブル（１０）
に挿通しておき、接続スリーブ等を用いてケーブル導体
（１１）を接続する。その後、前記あらかじめ挿通して
おいた構成体を、同図（ＩＩ＋）のようにケーブル導体
接続部（＋）上に戻し、ケーブル絶縁層（１２）に位置
せしめる。しかる後、前記内径拡大用治具（３）を長さ
方向に引抜くことにより、接続部絶縁筒（２）はその弾
性力により収縮し、ケーブル絶縁層（１２）に密着し、
第１図の如き接続部が形成される。Formation of such a cable connection part is achieved by inserting a structure in which an inner diameter expanding jig (3) having an inner diameter larger than the outer diameter of the cable insulating layer (12) is inserted into the inside of the insulating tube (2). 2
As shown in figure (a), connect one cable (10) in advance.
, and connect the cable conductor (11) using a connecting sleeve or the like. Thereafter, the structure that has been inserted in advance is returned onto the cable conductor connection portion (+) as shown in the figure (II+) and positioned on the cable insulation layer (12). Thereafter, by pulling out the inner diameter expanding jig (3) in the length direction, the connecting portion insulating tube (2) contracts due to its elastic force and comes into close contact with the cable insulating layer (12),
A connection as shown in FIG. 1 is formed.
上記接続部絶縁筒（２）内に挿通しその内径を拡大する
治具としては、通常、例えば特開昭Ｈ−１４１１１０号
公報に示されるような剛直管状体が使用されている。As a jig for inserting into the connecting portion insulating cylinder (2) and enlarging its inner diameter, a rigid tubular body as shown in, for example, Japanese Patent Application Laid-Open No. 141110/1984 is usually used.
（解決しようとする課題）
一般に地中布設の電力ケーブルは、第３図に示すように
マンホール（Ａ）で接続部（Ｂ）が形成され、接続部（
Ｂ）の両側にはケーブル（１ｏ）の熱による膨張、収縮
を吸収するためのオフセット部（ｔＯａ）が形成されて
いる。(Problem to be solved) Generally, as shown in Fig. 3, in underground power cables, the connection part (B) is formed in the manhole (A), and the connection part (B) is formed in the manhole (A).
Offset portions (tOa) are formed on both sides of B) to absorb thermal expansion and contraction of the cable (1o).
しかし、上述した電力ケーブルのプレハブ型接続部の形
成にあたっては、絶縁筒の内径を拡大する治具として剛
直管状体を用いており、又絶縁筒の材質面加ら内径の拡
大には限度あるため、接続部絶縁筒をケーブル上に逃が
す逃がし代、あるいは内径拡大用治具を引抜くときの長
さに見合う直線部（Ｎが必要である。このため接続部長
さが長くなり、それに起因してマンホールの長さも長く
なって不経済になるという問題点がある。However, in forming the prefabricated connection part of the power cable mentioned above, a rigid tubular body is used as a jig to expand the inner diameter of the insulating tube, and there is a limit to the expansion of the inner diameter due to the material of the insulating tube. , a relief allowance for letting the connecting part insulating tube escape onto the cable, or a straight part (N) corresponding to the length when pulling out the jig for expanding the inner diameter is required.For this reason, the connecting part becomes long, and due to this, There is a problem that the length of the manhole becomes long, making it uneconomical.
又第２図（ロ）に示すように、内径拡大用治具を挿入し
た絶縁筒を正規の位置に戻した後、内径拡大用治具を長
さ方向に引抜くが、従来の内径拡大用治具が１本の剛直
管状体でできているため、摩擦抵抗により大きな引抜き
力を必要とした。特に近時、ケーブルの超高圧化、大電
流容量化に伴ない、絶縁筒も大形化し、その傾向は一層
強くなり、作業性において問題があった。In addition, as shown in Figure 2 (b), after returning the insulating cylinder into which the inner diameter expanding jig has been inserted to its normal position, the inner diameter expanding jig is pulled out in the length direction, unlike the conventional inner diameter expanding jig. Since the jig was made of a single rigid tubular body, a large pulling force was required due to frictional resistance. Particularly in recent years, as cables have become ultra-high voltage and have a large current capacity, insulating cylinders have also become larger, and this tendency has become even stronger, posing problems in workability.
（課題を解決するための手段）
本発明は上述の問題点を解消した電力ケーブルの接続部
形成方法を提供するもので、その特徴は、絶縁筒の内径
拡大用治具をその長さ方向に複数個の連結体で屈曲可能
に構成したことにある。(Means for Solving the Problems) The present invention provides a method for forming a connection part of a power cable that solves the above-mentioned problems. The reason lies in that it is constructed to be bendable with a plurality of connecting bodies.
（実施例）
第４図（イ）は本発明の接続部形成方法において用いる
内径拡大用治具の具体例の要部の縦断面図であり、同図
（ｌはその連結部の詳細縦断面図である。(Example) FIG. 4(A) is a vertical cross-sectional view of a main part of a specific example of the inner diameter expanding jig used in the method for forming a connecting portion of the present invention, and (l is a detailed longitudinal cross-sectional view of the connecting portion). It is a diagram.
絶縁筒の内径拡大用治具（３）を長さ方向に複数に分割
した円筒状の連結体（３１）（３２）によって構成する
。連結体（３１Ｎ３２）の連結は、同図（ロ）に示すよ
うに、連結体（３１）の端面に形成した環状の凹部（３
３）と、連結体（３２）の端面に形成した上記凹部（３
３）に嵌合する凸部（３４）を嵌合することによって行
なう。この場合、凹部（３３）と凸部（３４）を嵌合し
た時、両者の間に若干のギャップ（ｇ）が生じるように
形成しておくことにより、連結体（３１）と連結体（３
２）とは連結部において屈曲が可能である。A jig (3) for enlarging the inner diameter of an insulating cylinder is constituted by a cylindrical connecting body (31) (32) divided into a plurality of parts in the length direction. The connection of the connecting body (31N32) is performed by using an annular recess (3
3) and the recess (3) formed on the end face of the connecting body (32).
This is done by fitting the convex portion (34) that fits into 3). In this case, by forming a slight gap (g) between the concave portion (33) and the convex portion (34) when they are fitted together, the connecting body (31) and the connecting body (34)
2) is capable of bending at the connecting portion.
上記連結体は図のように２個を連結したものでもよく、
あるいはそれ以上の複数個に分割したものを連結しても
よい。The above-mentioned connected body may be one in which two pieces are connected as shown in the figure,
Alternatively, it may be divided into a plurality of parts and connected.
（発明の効果）
以上説明したように、本発明の接続部形成方法によれば
、内径拡大用治具を複数個の連結体で屈曲可能に傳成し
であるので、マンホール内のオフセット部ケーブル上に
も接続部絶縁筒を逃がすことが可能となり、従来のよう
な直線部を必要としないので、マンホール長さを短かく
出来、経済的である。(Effects of the Invention) As explained above, according to the connection forming method of the present invention, the inner diameter expanding jig is made bendable by a plurality of connecting bodies, so that the offset part cable in the manhole can be bent. Since it is possible to escape the insulating tube at the connection part from above, and there is no need for a straight part like in the past, the length of the manhole can be shortened and it is economical.
又内径拡大用治具を絶縁筒から引抜く際、上記治具を長
さ方向に２分割し、左右に引抜くことにより摩擦抵抗が
減少し、小さな引抜き力で引抜くことができ、作業性が
向上する。Furthermore, when pulling out the jig for expanding the inner diameter from the insulating tube, by dividing the jig into two in the length direction and pulling it out left and right, frictional resistance is reduced and the jig can be pulled out with a small pulling force, improving work efficiency. will improve.
よ
第１図弁型カケープルのプレハブ型接続部の要部の縦断
面図である。
第２図（イ）及び（０）はいずれも第１図のプレハブ型
接続部の形成手順を示す縦断面図である。
第３図は電力ケーブルのマンホール内の状態説明図であ
る。
第４図（イ）は本発明の接続部形成方法において用いる
内径拡大用治具の具体例の要部の縦断面図、同図（０）
は連結部の詳細縦断面図で、ある。
１・・・導体接続部、２・・・接続部絶縁筒、３・・・
内径拡大用治具、３１．３２・・・連結体、３３・・・
嵌合凹部、３４・・・嵌合凸部。
埠
図
算
図
算
図
（Ｕ）
４
３FIG. 1 is a vertical cross-sectional view of the main part of the prefabricated connection part of the valve-type capeple. FIGS. 2(A) and 2(0) are both longitudinal cross-sectional views showing the procedure for forming the prefabricated connection portion of FIG. 1. FIG. 3 is an explanatory diagram of the state of the power cable inside the manhole. FIG. 4(a) is a vertical cross-sectional view of a main part of a specific example of the inner diameter expanding jig used in the connection part forming method of the present invention, and FIG.
is a detailed vertical cross-sectional view of the connecting portion. 1... Conductor connection part, 2... Connection part insulating cylinder, 3...
Jig for expanding inner diameter, 31.32... Connecting body, 33...
Fitting concave portion, 34... Fitting convex portion. Buzusan Zusanzu (U) 4 3
Claims (1)
絶縁層外径より大きな内径を有する内径拡大用治具を挿
通してあらかじめ一方のケーブル側に逃がしておき、ケ
ーブル導体接続後に前記絶縁筒を正規の位置に戻し内径
拡大用治具を取外すことにより絶縁筒をその弾性力によ
り収縮させケーブル絶縁層外表面に密着させる電力ケー
ブルの接続部形成方法において、内径拡大用治具をその
長さ方向に複数個の連結体で屈曲可能に構成したことを
特徴とする電力ケーブルの接続部形成方法。(1) When connecting a power cable, insert an inner diameter expanding jig having an inner diameter larger than the outer diameter of the cable insulation layer into the insulating tube and let it escape to one cable side in advance, and after connecting the cable conductor, the insulating tube In a power cable connection forming method, the insulating cylinder is contracted by its elastic force and brought into close contact with the outer surface of the cable insulation layer by returning the inner diameter expanding jig to its normal position and removing the inner diameter expanding jig. 1. A method for forming a connection part of a power cable, characterized in that the connection part of a power cable is configured to be bendable in a plurality of directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2049919A JP2819740B2 (en) | 1990-02-28 | 1990-02-28 | Method of forming connection part of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2049919A JP2819740B2 (en) | 1990-02-28 | 1990-02-28 | Method of forming connection part of power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03253213A true JPH03253213A (en) | 1991-11-12 |
| JP2819740B2 JP2819740B2 (en) | 1998-11-05 |
Family
ID=12844422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2049919A Expired - Lifetime JP2819740B2 (en) | 1990-02-28 | 1990-02-28 | Method of forming connection part of power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2819740B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010252522A (en) * | 2009-04-15 | 2010-11-04 | Tamachi Kogyo Kk | Electric-wire protecting pipe for base-isolation building and method for manufacturing the same |
| CN106785773A (en) * | 2016-12-26 | 2017-05-31 | 国网山东省电力公司栖霞市供电公司 | A kind of electric power cable termination |
-
1990
- 1990-02-28 JP JP2049919A patent/JP2819740B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010252522A (en) * | 2009-04-15 | 2010-11-04 | Tamachi Kogyo Kk | Electric-wire protecting pipe for base-isolation building and method for manufacturing the same |
| CN106785773A (en) * | 2016-12-26 | 2017-05-31 | 国网山东省电力公司栖霞市供电公司 | A kind of electric power cable termination |
| CN106785773B (en) * | 2016-12-26 | 2022-09-30 | 国网山东省电力公司栖霞市供电公司 | Power cable connecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2819740B2 (en) | 1998-11-05 |
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