JPH06339208A - Method for forming connection part of plastic power cable - Google Patents
Method for forming connection part of plastic power cableInfo
- Publication number
- JPH06339208A JPH06339208A JP6037601A JP3760194A JPH06339208A JP H06339208 A JPH06339208 A JP H06339208A JP 6037601 A JP6037601 A JP 6037601A JP 3760194 A JP3760194 A JP 3760194A JP H06339208 A JPH06339208 A JP H06339208A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- cable
- tube
- heat
- shrinkable tube
- 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
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000004033 plastic Substances 0.000 title claims abstract description 16
- 229920003023 plastic Polymers 0.000 title claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 238000004804 winding Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 17
- 230000002040 relaxant effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
(57)【要約】
【目的】 導体接続スリーブ上に施した半導電性熱収縮
チューブで形成した内部半導電層端部の電界集中を緩和
し、絶縁性能を向上させたプラスチック電力ケーブルの
接続部形成方法を提供する。
【構成】 ケーブル導体２を圧縮接続した導体接続スリ
ーブ４とケーブル導体２にわたって半導電性熱収縮チュ
ーブ５を施して該チューブ５を加熱収縮させた後、再加
熱して上記半導電性熱収縮チューブ５とケーブル導体２
の界面を接着一体化し、しかる後、上記チューブ５端の
角部を切削治具により大きな曲率半径をもつよう仕上げ
処理６するプラスチック電力ケーブルの接続部形成方
法。
(57) [Abstract] [Purpose] A plastic power cable connection that improves the insulation performance by relaxing the electric field concentration at the end of the inner semiconductive layer formed by the semiconductive heat-shrinkable tube on the conductor connection sleeve. A forming method is provided. [Structure] A semiconductive heat shrinkable tube 5 is applied over the conductor connecting sleeve 4 in which the cable conductor 2 is compression-connected and the cable conductor 2, and the tube 5 is heated and shrunk, and then reheated to be the semiconductive heat shrinkable tube. 5 and cable conductor 2
A method for forming a connection portion of a plastic power cable, in which the interface of the above is bonded and integrated, and then the corner portion of the end of the tube 5 is finished by a cutting jig so as to have a large radius of curvature 6.
Description
【０００１】[0001]
【産業上の利用分野】本発明は架橋ポリエチレン絶縁電
力ケーブル等のプラスチック電力ケーブルの接続部形成
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a connecting portion of a plastic power cable such as a crosslinked polyethylene insulated power cable.
【０００２】[0002]
【従来の技術】図３は従来のプラスチック電力ケーブル
の接続部形成方法の一例の要部の縦断面をあらわした説
明図である。図面において、１は架橋ポリエチレン等の
ケーブル絶縁体、２はケーブル導体、３はケーブルの内
部半導電層である。図面に示すように、ケーブル導体２
を導体接続スリーブ４で圧縮接続した後、該接続部表面
を平滑にして電界を緩和するため、スリーブ４とケーブ
ル導体２上にわたって半導電性の熱収縮チューブ５をか
ぶせ、加熱収縮させて接続部の内部半導電層を形成して
いた。そして上記半導電性熱収縮チューブ５により形成
された内部半導電層の端部は電界集中を緩和する目的
で、カッタナイフ等で約20°の傾きで直角部を切り落し
していた。2. Description of the Related Art FIG. 3 is an explanatory view showing a vertical cross section of a main part of an example of a conventional method for forming a connection portion of a plastic power cable. In the drawings, 1 is a cable insulator such as cross-linked polyethylene, 2 is a cable conductor, and 3 is an inner semiconductive layer of the cable. As shown in the drawing, the cable conductor 2
After compression connection with the conductor connection sleeve 4, a semi-conductive heat shrink tube 5 is covered over the sleeve 4 and the cable conductor 2 to smooth the surface of the connection portion and relax the electric field, and heat shrinks to connect the connection portion. Had formed an internal semiconductive layer. The end of the inner semiconductive layer formed by the semiconductive heat-shrinkable tube 5 was cut off at a right angle with a cutter knife or the like at a tilt of about 20 ° for the purpose of relaxing electric field concentration.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このようにし
て形成された内部半導電層の切り落し端の角部は突出部
Ａとして残り、図４に示すようにこの突出部Ａに電界Ｂ
が集中し、この突出部Ａを起点として絶縁破壊するとい
う問題があった。However, the corner portion of the cut-off end of the internal semiconductive layer thus formed remains as the protrusion A, and the electric field B is applied to the protrusion A as shown in FIG.
However, there is a problem in that dielectric breakdown occurs from the protruding portion A as a starting point.
【０００４】このような従来の接続部における内部半導
電層突出部Ａの電界集中程度の解析結果は、図５に示す
ように、電界がフラットな部分を 100％とすると、突出
部Ａは 133％の電界となり、この部分が電気性能上弱点
となることがわかる。As shown in FIG. 5, the analysis result of the electric field concentration of the protruding portion A of the inner semiconductive layer in such a conventional connecting portion shows that the protruding portion A is 133% when the flat portion of the electric field is 100%. It can be seen that the electric field becomes% and this portion becomes a weak point in electric performance.
【０００５】[0005]
【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、導体接続スリーブ上に施した半導電性熱収縮チ
ューブで形成した内部半導電層端部の突出部における電
界集中を緩和したプラスチック電力ケーブルの接続部形
成方法を提供するもので、その第１の特徴は、ケーブル
導体を圧縮接続した導体接続スリーブとケーブル導体に
わたって半導電性熱収縮チューブを施して該チューブを
加熱収縮させた後、再加熱して上記半導電性熱収縮端と
ケーブル導体の界面を接着一体化し、しかる後、上記チ
ューブ端の角部を切削治具により大きな曲率半径をもつ
よう仕上げ処理することにある。SUMMARY OF THE INVENTION The present invention solves the above problems and alleviates the electric field concentration at the projection of the end of the inner semiconductive layer formed by the semiconductive heat shrink tube formed on the conductor connecting sleeve. A first aspect of the present invention is to provide a method of forming a connection portion of a plastic power cable, the first feature of which is to apply a semi-conductive heat shrink tube over the conductor connection sleeve in which the cable conductor is compression connected and the cable conductor to heat shrink the tube. After that, it is reheated to bond and integrate the interface between the semi-conductive heat-shrinkable end and the cable conductor, and then the corner of the tube end is finished by a cutting jig so as to have a large radius of curvature. .
【０００６】そして、本発明の第２の特徴は、ケーブル
導体を圧縮接続した導体接続スリーブとケーブル導体に
わたって半導電性熱収縮チューブを施して該チューブを
加熱収縮させた後、上記半導電性熱収縮チューブの端部
突出部からケーブル導体上にわたって、上記半導電性熱
収縮チューブと同じ材質の半導電性テープで大きな曲率
半径をもつようテープ巻きを施し、該テープ巻き部をモ
ールド処理することにある。A second feature of the present invention is that a semiconductive heat-shrinkable tube is applied over the conductor connecting sleeve to which the cable conductor is compression-connected and the cable conductor to heat-shrink the tube, and then the semiconductive heat-shrinkable tube is used. A method of winding a tape with a semi-conductive tape made of the same material as the above-mentioned semi-conductive heat-shrinkable tube so as to have a large radius of curvature from the end protruding portion of the shrink tube to the cable conductor, and molding the tape winding section. is there.
【０００７】[0007]
【実施例】図１は本発明のプラスチック電力ケーブルの
接続部形成方法の具体例の要部の縦断面をあらわした説
明図である。図面において、図３と同一符号は同一部位
をあらわしている。従来同様に、導体接続スリーブ４と
ケーブル導体２にわたって半導電性熱収縮チューブ５を
かぶせ、加熱して上記熱収縮チューブ５を収縮させる。
その後、再加熱して半導電性熱収縮チューブ５端とケー
ブル導体２の界面を接着一体化させ、しかる後、上記半
導電性熱収縮チューブ５の端部突出部Ａ（図３参照）
を、切削治具を用いて大きな曲率半径をもつよう仕上げ
処理６を行い内部半導電層を形成する。上記用いる半導
電性熱収縮チューブの厚さは 2.0〜3.0mm が好適であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing a vertical cross section of an essential part of a concrete example of a method for forming a connection part of a plastic power cable of the present invention. In the drawing, the same reference numerals as those in FIG. 3 represent the same parts. Similarly to the conventional case, the semiconductive heat shrinkable tube 5 is put over the conductor connecting sleeve 4 and the cable conductor 2 and heated to shrink the heat shrinkable tube 5.
Then, it is reheated to bond and integrate the interface between the end of the semi-conductive heat-shrinkable tube 5 and the cable conductor 2, and then the end projection A of the semi-conductive heat-shrinkable tube 5 (see FIG. 3).
Is subjected to finishing treatment 6 using a cutting jig so as to have a large radius of curvature, and an internal semiconductive layer is formed. The thickness of the semiconductive heat-shrinkable tube used above is preferably 2.0 to 3.0 mm.
【０００８】図２は本発明のプラスチック電力ケーブル
の接続部形成方法の他の具体例の要部の縦断面をあらわ
した説明図である。図面において、図１、図３と同一符
号は同一部位をあらわしている。図１の具体例と同様
に、導体接続スリーブ４とケーブル導体２にわたって半
導電性熱収縮チューブ５を加熱収縮させた後、半導電性
熱収縮チューブ５の端部突出部Ａ（図３参照）からケー
ブル導体２上にわたって、上記半導電性熱収縮チューブ
５と同じ材質の半導電性テープで大きな曲率半径をもつ
ようテープ巻きを行い、該テープ巻き部をモールド処理
７し、内部半導電層を形成する。FIG. 2 is an explanatory view showing a vertical cross section of the essential part of another embodiment of the method for forming the connection part of the plastic power cable of the present invention. In the drawings, the same symbols as those in FIGS. 1 and 3 represent the same parts. Similar to the specific example of FIG. 1, after the semiconductive heat-shrinkable tube 5 is heat-shrinked across the conductor connecting sleeve 4 and the cable conductor 2, the end protruding portion A of the semiconductive heat-shrinkable tube 5 (see FIG. 3). From above to the cable conductor 2, tape winding is performed with a semi-conductive tape made of the same material as the semi-conductive heat-shrinkable tube 5 so as to have a large radius of curvature, and the tape winding portion is molded 7 to form an inner semi-conductive layer. Form.
【０００９】上記半導電性テープ巻き部のモールド処理
の方法は、（イ）テープ巻き後の半導電性熱収縮チュー
ブ端突出部からテープ巻き部にかけて専用加熱鏝で加熱
して半導電性テープを溶融化する方法、（ロ）半導電性
テープ巻き部の上に加熱用テフロンチューブをかぶせる
か、テフロンテープを巻き、その表面から加熱して半導
電性テープを溶融一体化する方法、（ハ）専用の半割り
加熱環を半導電性テープ巻き部に圧着固定し、加熱して
溶融一体化する方法等がある。The method of molding the semi-conductive tape winding portion is as follows: (a) The semi-conductive tape is wound by heating with a dedicated heating iron from the semi-conductive heat-shrinkable tube end protruding portion after the tape winding to the tape winding portion. Method of melting, (b) Method of covering the semiconductive tape winding part with a heating Teflon tube or winding Teflon tape and heating from the surface to melt and integrate the semiconductive tape, (c) For example, there is a method in which a dedicated half-divided heating ring is pressure-bonded to the winding portion of the semi-conductive tape and heated to melt and integrate.
【００１０】[0010]
【作用】本発明の接続部形成方法においては、半導電性
熱収縮チューブの内部半導電層端部の突出部に、曲率半
径の大きい処理部を形成することにより、電界は図６
（イ）のようにチューブ処理部、又は図６（ロ）のよう
にテープ巻き処理部に沿って分布し、突出部Ａの電界は
図６（イ）（ロ）のＣのように緩和される。In the method for forming a connecting portion of the present invention, the electric field is generated by forming a processing portion having a large radius of curvature on the protruding portion at the end portion of the inner semiconductive layer of the semiconductive heat-shrinkable tube.
6A, or the tape winding process portion as shown in FIG. 6B, the electric field of the protruding portion A is relaxed as shown by C in FIGS. 6A and 6B. It
【００１１】半導電性熱収縮チューブ端を角落ししただ
けの従来の接続部と、上記チューブ端を大きな曲率半径
をもつよう処理した本発明の接続部について、交流破壊
試験を行った結果を表１に示す。表１より明らかなよう
に、従来の接続部の破壊値を100％としたとき、本発明
の接続部の破壊値は29％向上していることがわかる。The results of an AC breakdown test are shown for the conventional connection part in which the semi-conductive heat-shrinkable tube end is just dropped and the connection part of the present invention in which the tube end is treated to have a large radius of curvature. Shown in 1. As is clear from Table 1, when the breaking value of the conventional connecting portion is 100%, the breaking value of the connecting portion of the present invention is improved by 29%.
【００１２】[0012]
【表１】 [Table 1]
【００１３】この結果、従来の接続部ではフラット部電
界を 100％とすると、突出部Ａでは図５のように 133％
の電界集中となるが、本発明の接続部では同じ場所での
電界集中は 106％とフラット部並みになり改良効果は約
27％となる。As a result, assuming that the electric field in the flat portion is 100% in the conventional connecting portion, the protrusion portion A has a 133% electric field as shown in FIG.
The electric field concentration is 106% at the same place in the connection part of the present invention, which is almost the same as the flat part, and the improvement effect is about
27%.
【００１４】[0014]
【発明の効果】以上説明したように、本発明のプラスチ
ック電力ケーブルの接続部形成方法によれば、導体接続
スリーブ上に施した内部半導電層端部における電界集中
は著しく緩和され、絶縁性能が向上する。従って、架橋
ポリエチレン絶縁電力ケーブル等のプラスチック電力ケ
ーブルの接続部の形成に利用するとき効果的である。As described above, according to the method for forming the connecting portion of the plastic power cable of the present invention, the electric field concentration at the end of the inner semiconductive layer formed on the conductor connecting sleeve is remarkably alleviated, and the insulating performance is improved. improves. Therefore, it is effective when used for forming a connection portion of a plastic power cable such as a cross-linked polyethylene insulated power cable.
【図１】本発明のプラスチック電力ケーブルの接続部形
成方法の具体例の要部の縦断面をあらわした説明図であ
る。FIG. 1 is an explanatory view showing a vertical cross section of a main part of a specific example of a method for forming a connection part of a plastic power cable of the present invention.
【図２】本発明のプラスチック電力ケーブルの接続部形
成方法の他の具体例の要部の縦断面をあらわした説明図
である。FIG. 2 is an explanatory view showing a vertical cross section of a main part of another specific example of the method for forming a connection part of a plastic power cable of the present invention.
【図３】従来のプラスチック電力ケーブルの接続部形成
方法の一例の要部の縦断面をあらわした説明図である。FIG. 3 is an explanatory view showing a vertical cross section of a main part of an example of a conventional method for forming a connection portion of a plastic power cable.
【図４】従来方法の接続部の内部半導電層端部の電界分
布図である。FIG. 4 is an electric field distribution diagram of an inner semiconductive layer end portion of a connection portion according to a conventional method.
【図５】従来方法の接続部と本発明方法の接続部の電界
比較図である。FIG. 5 is an electric field comparison diagram of the connection part of the conventional method and the connection part of the method of the present invention.
【図６】（イ）及び（ロ）はいずれも本発明方法の接続
部の内部半導電層端部の電界分布図である。6 (a) and 6 (b) are electric field distribution diagrams at the inner semiconductive layer end portion of the connection portion of the method of the present invention.
１ ケーブル絶縁体 ２ ケーブル導体 ３ ケーブル内部半導電層 ４ 導体接続スリーブ ５ 半導体熱収縮チューブ ６ 半導体熱収縮チューブ仕上げ処理部 ７ 半導体テープ巻き処理部 1 Cable Insulator 2 Cable Conductor 3 Cable Inner Semi-Conductive Layer 4 Conductor Connection Sleeve 5 Semiconductor Heat Shrink Tube 6 Semiconductor Heat Shrink Tube Finish Processing Section 7 Semiconductor Tape Winding Processing Section
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上村 栄一 東京都世田谷区桜新町二丁目13番２号 住 友電気工業株式会社地中線工事センター内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Uemura 2-13-2 Sakurashinmachi, Setagaya-ku, Tokyo Sumitomo Electric Industries, Ltd. Underground cable construction center
Claims (3)
リーブとケーブル導体にわたって半導電性熱収縮チュー
ブを施して該チューブを加熱収縮させた後、再加熱して
上記半導電性熱収縮端とケーブル導体の界面を接着一体
化し、しかる後、上記チューブ端の角部を切削治具によ
り大きな曲率半径をもつよう仕上げ処理することを特徴
とするプラスチック電力ケーブルの接続部形成方法。1. A semiconductive heat-shrinkable tube is provided over a conductor connecting sleeve to which a cable conductor is compression-connected and a cable conductor to heat-shrink the tube, and then reheated to reheat the semiconductive heat-shrinkable end and the cable conductor. A method for forming a connection portion of a plastic power cable, characterized in that the interface of the above is bonded and integrated, and then the corner portion of the tube end is finished by a cutting jig so as to have a large radius of curvature.
3.0mm であることを特徴とする請求項１記載のプラスチ
ック電力ケーブルの接続部形成方法。2. The semiconductive heat-shrinkable tube has a thickness of 2.0 to
The method for forming a connection portion of a plastic power cable according to claim 1, wherein the connection portion has a length of 3.0 mm.
リーブとケーブル導体にわたって半導電性熱収縮チュー
ブを施して該チューブを加熱収縮させた後、上記半導電
性熱収縮チューブの端部突出部からケーブル導体上にわ
たって、上記半導電性熱収縮チューブと同じ材質の半導
電性テープで大きな曲率半径をもつようテープ巻きを施
し、該テープ巻き部をモールド処理することを特徴とす
るプラスチック電力ケーブルの接続部形成方法。3. A conductor-conducting sleeve to which a cable conductor is compression-connected and a semiconductive heat-shrinkable tube are applied over the cable conductor to heat-shrink the tube, and then the cable is pulled from an end projection of the semiconductive heat-shrinkable tube. A connecting portion of a plastic power cable, characterized in that a semi-conductive tape made of the same material as the semi-conductive heat-shrinkable tube is wound over the conductor so as to have a large radius of curvature, and the tape winding portion is molded. Forming method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6037601A JPH06339208A (en) | 1993-04-02 | 1994-02-10 | Method for forming connection part of plastic power cable |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2207993 | 1993-04-02 | ||
| JP5-22079 | 1993-04-02 | ||
| JP6037601A JPH06339208A (en) | 1993-04-02 | 1994-02-10 | Method for forming connection part of plastic power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06339208A true JPH06339208A (en) | 1994-12-06 |
Family
ID=26359241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6037601A Pending JPH06339208A (en) | 1993-04-02 | 1994-02-10 | Method for forming connection part of plastic power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06339208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2677850C1 (en) * | 2018-03-19 | 2019-01-22 | Федеральное государственное унитарное предприятие "Московское опытно-конструкторское бюро "Марс" (ФГУП МОКБ "Марс") | Device and method of the cable end sleeve with angular entry into an electric connector |
| RU192627U1 (en) * | 2019-06-11 | 2019-09-24 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | CABLE ASSEMBLY |
-
1994
- 1994-02-10 JP JP6037601A patent/JPH06339208A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2677850C1 (en) * | 2018-03-19 | 2019-01-22 | Федеральное государственное унитарное предприятие "Московское опытно-конструкторское бюро "Марс" (ФГУП МОКБ "Марс") | Device and method of the cable end sleeve with angular entry into an electric connector |
| RU192627U1 (en) * | 2019-06-11 | 2019-09-24 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | CABLE ASSEMBLY |
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