JPH06133443A - Cable joint - Google Patents
Cable jointInfo
- Publication number
- JPH06133443A JPH06133443A JP30505292A JP30505292A JPH06133443A JP H06133443 A JPH06133443 A JP H06133443A JP 30505292 A JP30505292 A JP 30505292A JP 30505292 A JP30505292 A JP 30505292A JP H06133443 A JPH06133443 A JP H06133443A
- Authority
- JP
- Japan
- Prior art keywords
- voltage electrode
- high voltage
- cable
- sleeve
- connecting portion
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 16
- 239000012212 insulator Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高電圧ケーブルの接続
部における高圧電極の近傍に形成される電界を緩和した
ケーブル接続部に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connecting portion which relaxes an electric field formed near a high voltage electrode in a connecting portion of a high voltage cable.
【０００２】[0002]
【従来の技術】高電圧ケーブルの導体をスリーブを用い
て電気接続した場合、スリーブ外周面に存在する凹凸に
よって周辺の電界が乱れる。従来、このような電界の乱
れを防止するため、次のような接続部構造を採用してい
た。図３に従来のケーブル接続部の一例を示す縦断面図
を図示した。図において、例えばＣＶケーブル等からな
るケーブル１は、絶縁体２を剥離してその端部に所定長
導体３を露出させている。この導体３は接続スリーブ４
によってもう一方のケーブルの導体と圧縮接続されてい
る。ここで、この図に示すように接続スリーブ４の外周
面には凸凹があり、その電界の乱れを整えるために、ち
ょうど絶縁体２の外径と同一の内径でスリーブ状の高圧
電極５を配置している。この高圧電極５は銅パイプ等の
電気導体から構成され、接続スリーブ４の外周面に形成
された凸部４Ａに電気的に接触し、接続スリーブ４と同
電位になるように設定されている。2. Description of the Related Art When a conductor of a high-voltage cable is electrically connected using a sleeve, irregularities existing on the outer peripheral surface of the sleeve disturb the surrounding electric field. Conventionally, in order to prevent such disturbance of the electric field, the following connecting portion structure has been adopted. FIG. 3 shows a vertical sectional view showing an example of a conventional cable connecting portion. In the figure, in a cable 1 made of, for example, a CV cable, an insulator 2 is peeled off to expose a conductor 3 of a predetermined length at an end thereof. This conductor 3 is a connecting sleeve 4
By compression connection with the conductor of the other cable. Here, as shown in this figure, the outer peripheral surface of the connecting sleeve 4 has irregularities, and the sleeve-shaped high-voltage electrode 5 is arranged with the same inner diameter as the outer diameter of the insulator 2 in order to adjust the disturbance of the electric field. is doing. The high-voltage electrode 5 is made of an electric conductor such as a copper pipe, and is set so as to be in electrical contact with the convex portion 4A formed on the outer peripheral surface of the connection sleeve 4 and have the same potential as the connection sleeve 4.
【０００３】なお、この高圧電極５は予めポリエチレン
等から構成された絶縁補強体６にモールド一体化されて
いる。従って、接続部を形成する際には予めケーブル１
に嵌め込まれ、接続スリーブ４の圧縮作業が完了する
と、ケーブル１の長手方向にずらして図３に示すような
位置に配置する。上記のような構成によって、高圧電極
５が接続部近傍の電界を整え、絶縁補強体６に対し部分
的に高い電界が集中するのを防止し、ケーブル接続部の
特性を維持している。The high-voltage electrode 5 is molded and integrated in advance with an insulating reinforcing member 6 made of polyethylene or the like. Therefore, when forming the connection portion, the cable 1 is previously prepared.
When the connecting sleeve 4 is completely compressed, the connecting sleeve 4 is displaced in the longitudinal direction of the cable 1 and arranged at the position shown in FIG. With the above configuration, the high-voltage electrode 5 regulates the electric field in the vicinity of the connection portion, prevents the high electric field from partially concentrating on the insulating reinforcing member 6, and maintains the characteristics of the cable connection portion.
【０００４】[0004]
【発明が解決しようとする課題】ところで、従来上記の
ようなケーブル接続部において、ケーブル１を高い電圧
で使用した場合、特に高圧電極５の両端部分、即ち図３
に示した矢印Ａの部分で絶縁破壊が生じるという問題が
あった。即ち、図３に示すような断面構造の接続部にお
いては、高圧電極５の両端部分に最も電界が集中する。
従って、ケーブル１の使用電圧を高めていくと、この高
圧電極５の両端部分である矢印Ａの部分が最も弱点とな
り、一定以上の使用電圧でコロナ放電等を発生する。従
って、一定以上の規格のケーブル接続部については、図
３に示すような従来構造の接続部がそのまま使用できな
いという問題があった。しかしながら、使用電圧に応じ
て接続部の構造を大幅に変更するのはコストアップの原
因となる。本発明は以上の点に着目してなされたもの
で、接続部の大幅な設計変更なしにその使用耐圧を向上
させたケーブル接続部を提供することを目的とするもの
である。By the way, when the cable 1 is conventionally used at a high voltage in the above-mentioned cable connecting portion, particularly both end portions of the high voltage electrode 5, that is, FIG.
There is a problem that dielectric breakdown occurs at the portion indicated by arrow A in FIG. That is, in the connecting portion having the cross-sectional structure as shown in FIG. 3, the electric field is most concentrated at both end portions of the high voltage electrode 5.
Therefore, as the working voltage of the cable 1 is increased, the portions of the high voltage electrode 5, which are both ends of the arrow A, become the weakest points, and corona discharge or the like occurs at a working voltage of a certain level or more. Therefore, with respect to the cable connection portion of a certain standard or more, there is a problem that the connection portion having the conventional structure as shown in FIG. 3 cannot be used as it is. However, changing the structure of the connection portion in accordance with the operating voltage causes a cost increase. The present invention has been made in view of the above points, and it is an object of the present invention to provide a cable connecting portion whose operating withstand voltage is improved without drastically changing the design of the connecting portion.
【０００５】[0005]
【課題を解決するための手段】本発明のケーブル接続部
は、ケーブル導体間を相互に接続する接続スリーブと、
この接続スリーブを中間絶縁層を介して包囲する高圧電
極と、この高圧電極外周を包囲する絶縁補強体とを備
え、前記高圧電極と前記絶縁補強体とが予めモールド一
体化されていることを特徴とするものである。A cable connecting portion of the present invention comprises a connecting sleeve for connecting cable conductors to each other.
A high-voltage electrode that surrounds the connection sleeve via an intermediate insulating layer, and an insulating reinforcing body that surrounds the outer periphery of the high-voltage electrode, wherein the high-voltage electrode and the insulating reinforcing body are pre-molded and integrated. It is what
【０００６】[0006]
【作用】このケーブル接続部の接続スリーブと高圧電極
とは、従来と異なり直接電気接続されていない。即ち、
両者の間には中間絶縁層が存在する。従って、接続スリ
ーブの電位より高圧電極の電位が低くなる。これによ
り、高圧電極の端部における電界が接続スリーブと同電
位の場合と比較して弱くなり、その部分での絶縁破壊が
防止される。The connecting sleeve of this cable connecting portion and the high voltage electrode are not directly electrically connected, unlike the conventional case. That is,
An intermediate insulating layer exists between the two. Therefore, the potential of the high voltage electrode becomes lower than that of the connection sleeve. As a result, the electric field at the end of the high-voltage electrode becomes weaker than that at the same potential as the connection sleeve, and dielectric breakdown at that part is prevented.
【０００７】[0007]
【実施例】以下、本発明を図の実施例を用いて詳細に説
明する。図１は本発明のケーブル接続部実施例を示す縦
断面図である。図において、ケーブル１は例えば高電圧
に使用されるＣＶケーブル等から構成される。このケー
ブル１は絶縁体２を剥離し導体３が露出されている。そ
して、互いにつきあわされた導体３は、接続スリーブ７
によって圧縮接続されている。この部分における電界の
乱れを防止するために、本発明のケーブル接続部におい
ても従来と同様の構造の高圧電極５が設けられる。即
ち、この高圧電極５は、絶縁体２の外径とほぼ同一の内
径を持つスリーブ状の金属等により構成される。また、
高圧電極５はポリエチレン等の絶縁補強体６と予めモー
ルド一体化されている。The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a vertical sectional view showing an embodiment of a cable connecting portion of the present invention. In the figure, the cable 1 is composed of, for example, a CV cable used for high voltage. In this cable 1, the insulator 2 is peeled off and the conductor 3 is exposed. Then, the conductors 3 associated with each other are connected to the connection sleeve 7
Compressed by. In order to prevent the disturbance of the electric field in this portion, the cable connecting portion of the present invention is also provided with the high-voltage electrode 5 having the same structure as the conventional one. That is, the high-voltage electrode 5 is composed of a sleeve-shaped metal or the like having an inner diameter substantially the same as the outer diameter of the insulator 2. Also,
The high voltage electrode 5 is pre-molded and integrated with the insulating reinforcing member 6 such as polyethylene.
【０００８】ここで、本発明のケーブル接続部において
は、接続スリーブ７と高圧電極５とが互いに電気接続さ
れていない。即ち、高圧電極５に包囲されたケーブル１
の導体３及び接続スリーブ７の周辺部分には、この実施
例では高誘電率の絶縁性樹脂が充填されている。この絶
縁性樹脂から成る部分を本発明において中間絶縁層８と
呼んでいる。本発明においては、接続スリーブ７はこの
中間絶縁層８を介して高圧電極５により包囲される構成
とされている。In the cable connecting portion of the present invention, the connecting sleeve 7 and the high voltage electrode 5 are not electrically connected to each other. That is, the cable 1 surrounded by the high voltage electrode 5
In this embodiment, the peripheral portions of the conductor 3 and the connection sleeve 7 are filled with an insulating resin having a high dielectric constant. The portion made of this insulating resin is called the intermediate insulating layer 8 in the present invention. In the present invention, the connection sleeve 7 is configured to be surrounded by the high voltage electrode 5 via the intermediate insulating layer 8.
【０００９】上記のような構成にした場合、高圧電極５
は接続スリーブ７よりも低い電位になり、これをさらに
絶縁補強体６で包囲して絶縁保護するという構成とな
る。上記中間絶縁層８について高い誘電率の樹脂を使用
すると、その分担電圧は低くなる。従って、接続スリー
ブ７と高圧電極５との電位差は小さくなる。逆に低い誘
電率の樹脂をこの中間絶縁層８に使用すれば比較的高圧
電極５の電位が低くなる。どの程度の電位に選定するか
は接続スリーブ７の外径と中間絶縁層８の誘電率によっ
て自由に選定すればよい。これによって、使用電圧に対
し高圧電極５の端部における電界強度を設定値以下に抑
えることができる。In the case of the above configuration, the high voltage electrode 5
Has a lower potential than that of the connection sleeve 7, and is further surrounded by an insulation reinforcing member 6 to perform insulation protection. If a resin having a high dielectric constant is used for the intermediate insulating layer 8, the shared voltage becomes low. Therefore, the potential difference between the connection sleeve 7 and the high voltage electrode 5 becomes small. On the contrary, if a resin having a low dielectric constant is used for the intermediate insulating layer 8, the potential of the high voltage electrode 5 becomes relatively low. The potential to be selected may be freely selected according to the outer diameter of the connection sleeve 7 and the dielectric constant of the intermediate insulating layer 8. As a result, the electric field strength at the end of the high voltage electrode 5 with respect to the working voltage can be suppressed to be equal to or lower than the set value.
【００１０】図２に本発明の効果を実証するための資料
断面図を示す。図（ａ）は従来の構成のケーブル接続部
の特性を試験する資料断面図で、（ｂ）は本発明のケー
ブル接続部の特性を試験する資料の断面図である。図に
おいて、中心導体１１は絶縁体１２により包囲されてお
り、ちょうど接続部に該当する部分に大径部１１Ａが設
けられている。そして、大径部１１Ａの両端部分に高圧
電極部１１Ｂが形成されている。この高圧電極部１１Ｂ
はちょうど大径部１１Ａの反対側即ち図の左側にも存在
するが、左右対称の構造のため図示を省略している。ま
た、本発明の接続部の場合には、ケーブルの導体に該当
する中心導体１１は均一な外径とし、接続部に相当する
位置に絶縁体１２を介して筒状の高圧電極部１３が形成
されている。FIG. 2 shows a sectional view of a material for demonstrating the effect of the present invention. FIG. 1A is a sectional view of a material for testing the characteristics of a cable connecting portion having a conventional configuration, and FIG. 1B is a sectional view of a material for testing the characteristics of a cable connecting portion of the present invention. In the figure, the central conductor 11 is surrounded by an insulator 12, and a large-diameter portion 11A is provided just at the portion corresponding to the connecting portion. The high-voltage electrode portions 11B are formed on both ends of the large diameter portion 11A. This high voltage electrode section 11B
Exists on the opposite side of the large-diameter portion 11A, that is, on the left side of the drawing, but the illustration is omitted because of the symmetrical structure. Further, in the case of the connection part of the present invention, the central conductor 11 corresponding to the conductor of the cable has a uniform outer diameter, and the cylindrical high-voltage electrode part 13 is formed at a position corresponding to the connection part via the insulator 12. Has been done.
【００１１】上記のような資料を用いて中心導体１１に
対し、１００ｋＶの電圧を印加し、各部分における電界
強度の測定を行なった。なお、具体的には（ａ）に示す
中心導体１１の直径が２６mm、大径部１１Ａの外径が９
０mm、高圧電極部１１Ｂの内径が８０mm、高圧電極部１
１Ｂの端部は半径５mmの曲率とし、接続部の長さは１０
０mm、高圧電極部１１Ｂの長さは１５mmに選定した。こ
の場合に高圧電極部１１Ｂの端部には、１mm当り９．３
２ｋＶの電界が加わった。A voltage of 100 kV was applied to the central conductor 11 using the above materials, and the electric field strength at each portion was measured. Specifically, the diameter of the central conductor 11 shown in (a) is 26 mm, and the outer diameter of the large diameter portion 11A is 9 mm.
0 mm, the inner diameter of the high voltage electrode part 11B is 80 mm, the high voltage electrode part 1
The end of 1B has a radius of curvature of 5 mm and the length of the connecting portion is 10 mm.
The length of the high voltage electrode portion 11B was selected to be 0 mm and 15 mm. In this case, at the end of the high voltage electrode portion 11B, 9.3 per mm.
An electric field of 2 kV was applied.
【００１２】一方、本発明に相当する（ｂ）の資料は、
（ａ）の資料と同一の外径の中心導体１１と同一の外径
の絶縁体１２を備えている。即ち、中心導体１１の外径
は２６mm、絶縁体１２の外径は１４０mmに選定した。ま
た、接続部に該当する中心導体１１の大径部１１Ａの半
径を４８mm、高圧電極部１３の内径を８０mm、外径を９
０mmに選定した。また、その端部の曲率は半径５mmとし
た。このような構成とした場合、図の大径部１１Ａの端
部であるＸ点においては、その電界が１mm当り８．６９
ｋＶ、また、高圧電極部１３の端部である図のＹ点にお
いては、その電界が１mm当り３．４８ｋＶとなった。上
記の実験結果から分かるように、本発明のケーブル接続
部においては、高圧電極の端部における電界を十分に小
さくし、ケーブルの使用電圧が高い場合においても高圧
電極の端部においての絶縁破壊を防止できるようになっ
た。On the other hand, the material of (b) corresponding to the present invention is
The center conductor 11 having the same outer diameter as that of the data (a) and the insulator 12 having the same outer diameter are provided. That is, the outer diameter of the central conductor 11 was 26 mm and the outer diameter of the insulator 12 was 140 mm. Also, the radius of the large diameter portion 11A of the central conductor 11 corresponding to the connecting portion is 48 mm, the inner diameter of the high voltage electrode portion 13 is 80 mm, and the outer diameter is 9 mm.
Selected to 0 mm. The radius of curvature of the end portion was 5 mm. In the case of such a configuration, at the point X, which is the end of the large diameter portion 11A in the figure, the electric field is 8.69 per mm.
At kV, and at the end of the high-voltage electrode portion 13 at point Y in the figure, the electric field was 3.48 kV per mm. As can be seen from the above experimental results, in the cable connection portion of the present invention, the electric field at the end of the high voltage electrode is sufficiently small, and even when the working voltage of the cable is high, the dielectric breakdown at the end of the high voltage electrode is caused. It came to be able to prevent it.
【００１３】本発明は以上の実施例に限定されない。上
記実施例においては、接続スリーブは圧縮スリーブとし
たが、溶接によるものであっても差し支えなく、また、
直線接続部でなく分岐接続部等についても同様のことが
できる。The present invention is not limited to the above embodiments. Although the connection sleeve is the compression sleeve in the above-mentioned embodiment, it may be welded.
The same can be applied to the branch connection part and the like instead of the straight line connection part.
【００１４】[0014]
【発明の効果】以上説明した本発明のケーブル接続部
は、ケーブル導体間を相互に接続する接続スリーブを中
間絶縁層を介して包囲するように高圧電極を配置したの
で、その高圧電極の端部において発生する電界を、高圧
電極を接続スリーブと同電位にした場合に比較して十分
に低く抑えることができる。これによって、高圧電極を
一体にモールドした絶縁補強体についてその絶縁破壊を
防止し、ケーブルを高い電圧で使用することが可能とな
る。According to the cable connecting portion of the present invention described above, the high voltage electrode is arranged so as to surround the connection sleeve for connecting the cable conductors with each other through the intermediate insulating layer, and therefore, the end portion of the high voltage electrode. The electric field generated in 1 can be suppressed sufficiently lower than in the case where the high-voltage electrode has the same potential as the connection sleeve. As a result, it is possible to prevent the dielectric breakdown of the insulation reinforcement body integrally molded with the high voltage electrode and to use the cable at a high voltage.
【図１】本発明のケーブル接続部実施例を示す縦断面図
である。FIG. 1 is a vertical sectional view showing an embodiment of a cable connecting portion of the present invention.
【図２】本発明の効果を説明するための資料の縦断面図
で、（ａ）は従来のケーブル接続部に相当する資料断面
図、（ｂ）は本発明のケーブル接続部に相当する資料の
断面図である。2A and 2B are longitudinal sectional views of materials for explaining the effect of the present invention, in which FIG. 2A is a sectional view of a material corresponding to a conventional cable connecting portion, and FIG. 2B is a material corresponding to a cable connecting portion of the present invention. FIG.
【図３】従来のケーブル接続部の一例を示す縦断面図で
ある。FIG. 3 is a vertical cross-sectional view showing an example of a conventional cable connecting portion.
１ ケーブル ２ 絶縁体 ３ 導体 ５ 高圧電極 ６ 絶縁補強体 ７ 接続スリーブ ８ 中間絶縁層 1 Cable 2 Insulator 3 Conductor 5 High Voltage Electrode 6 Insulation Reinforcement 7 Connection Sleeve 8 Intermediate Insulation Layer
Claims (1)
リーブと、 この接続スリーブを中間絶縁層を介して包囲する高圧電
極と、 この高圧電極外周を包囲する絶縁補強体とを備え、 前記高圧電極と前記絶縁補強体とが予めモールド一体化
されていることを特徴とするケーブル接続部。1. A high-voltage electrode, comprising: a connection sleeve for connecting cable conductors to each other; a high-voltage electrode surrounding the connection sleeve with an intermediate insulating layer; and an insulating reinforcement surrounding the outer periphery of the high-voltage electrode. A cable connecting part, characterized in that the insulating reinforcement and the insulating reinforcement are integrated in advance with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30505292A JPH06133443A (en) | 1992-10-16 | 1992-10-16 | Cable joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30505292A JPH06133443A (en) | 1992-10-16 | 1992-10-16 | Cable joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06133443A true JPH06133443A (en) | 1994-05-13 |
Family
ID=17940541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30505292A Pending JPH06133443A (en) | 1992-10-16 | 1992-10-16 | Cable joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06133443A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100866590B1 (en) * | 2006-12-28 | 2008-11-10 | 부영산전주식회사 | Connector and connecting method of detection line |
| CN111585063A (en) * | 2019-02-19 | 2020-08-25 | 安徽省浩辉电力技术有限公司 | Preparation method of integrally prefabricated intermediate joint |
-
1992
- 1992-10-16 JP JP30505292A patent/JPH06133443A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100866590B1 (en) * | 2006-12-28 | 2008-11-10 | 부영산전주식회사 | Connector and connecting method of detection line |
| CN111585063A (en) * | 2019-02-19 | 2020-08-25 | 安徽省浩辉电力技术有限公司 | Preparation method of integrally prefabricated intermediate joint |
| CN111585063B (en) * | 2019-02-19 | 2021-07-23 | 安徽省浩辉电力股份有限公司 | Preparation method of integrally prefabricated intermediate joint |
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