JP2003134655A - Pre-mold rubber insulation pipe and plastic insulation power cable joint using the same - Google Patents
Pre-mold rubber insulation pipe and plastic insulation power cable joint using the sameInfo
- Publication number
- JP2003134655A JP2003134655A JP2001319458A JP2001319458A JP2003134655A JP 2003134655 A JP2003134655 A JP 2003134655A JP 2001319458 A JP2001319458 A JP 2001319458A JP 2001319458 A JP2001319458 A JP 2001319458A JP 2003134655 A JP2003134655 A JP 2003134655A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- rubber
- insulating
- cable
- power cable
- 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
Landscapes
- Cable Accessories (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Processing Of Terminals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プラスチック絶縁
電力ケーブルの接続に用いるプレモールドゴム絶縁筒、
特に、構造を簡略化、低コスト化することを可能とした
プレモールドゴム絶縁筒、およびこのゴム絶縁筒を装着
したプラスチック絶縁電力ケーブルの接続部に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a premolded rubber insulating tube used for connecting a plastic insulated power cable,
In particular, the present invention relates to a pre-molded rubber insulating tube that can simplify the structure and reduce the cost, and a connecting portion of a plastic insulated power cable equipped with the rubber insulating tube.
【０００２】[0002]
【従来の技術】架橋ポリエチレン絶縁に代表されるプラ
スチック絶縁電力ケーブルは、その優れた絶縁性と取り
扱い容易さによって急速に汎用化の道をたどってきてい
る。それに伴い、ケーブル接続作業の総数が増大し、こ
れらの作業の簡素化、短時間化に対する要求が大きくな
っている。2. Description of the Related Art Plastic-insulated power cables represented by cross-linked polyethylene insulation are rapidly becoming versatile due to their excellent insulation and easy handling. Along with this, the total number of cable connecting works is increasing, and demands for simplification and shortening of these works are increasing.
【０００３】近年、接続時間が短く、簡単に接続可能な
ジョイントとして、内部半導電層、絶縁層、外部半導電
層で形成されたゴムブロックを用いたプレハブ型接続部
や、さらには図３に示す１ピース・プレモールドゴム絶
縁筒を装着した接続部が実用化されている。In recent years, as a joint which has a short connection time and can be easily connected, a prefabricated type connecting portion using a rubber block formed of an inner semiconductive layer, an insulating layer and an outer semiconductive layer, and further, FIG. The connection part equipped with the one-piece pre-molded rubber insulating tube shown in the figure has been put into practical use.
【０００４】図３に示す接続部は、導体１の接続部およ
びケーブル絶縁体２を覆い、且つケーブル外部半導電層
３に跨るように、これらの外周に装着されたプレモール
ドゴム絶縁筒３０と、図示されていないが、絶縁筒３０
を覆う２つ割り型の保護カバーと、その両端に形成され
た防水処理部とを備えている。図３に示すプレモールド
ゴム絶縁筒３０は、一般に絶縁性能が高く、また成形加
工性に優れたエチレンプロピレンゴムをベースゴムとし
て使用し、内部半導電層３１、補強絶縁層３２および外
部半導電層３３とが一体的にモールド成形された、全体
で１つの部品（１ピース）で構成されており、接続施工
面で簡略化が進められている。The connecting portion shown in FIG. 3 covers the connecting portion of the conductor 1 and the cable insulator 2, and the premolded rubber insulating tube 30 mounted on the outer periphery of the cable so as to straddle the outer semiconductive layer 3 of the cable. Although not shown, the insulating cylinder 30
It is provided with a two-part type protective cover for covering and a waterproof processing part formed at both ends thereof. The pre-molded rubber insulating cylinder 30 shown in FIG. 3 generally uses ethylene propylene rubber having high insulation performance and excellent moldability as a base rubber, and has an inner semiconductive layer 31, a reinforcing insulation layer 32 and an outer semiconductive layer. 33 and 33 are integrally molded, and are configured as one component (one piece) as a whole, and simplification is being advanced in terms of connection construction.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
プレモールドゴム絶縁筒の製作には各層ごとに金型が必
要であり、製作時間，コストがかかってしまうという問
題がある。However, in order to manufacture the above-mentioned pre-molded rubber insulating cylinder, a mold is required for each layer, which causes a problem that manufacturing time and cost are increased.
【０００６】本発明は上記の問題点に鑑みてなされたも
ので、その目的とするところは、プレモールドゴム絶縁
筒の構造を簡略化することにより製作時間の短縮化を図
ると共に、ゴム絶縁筒をコンパクトにして接続部の組立
作業の簡素化を図り、接続部の形成に要する費用を低減
させるものである。The present invention has been made in view of the above problems. An object of the present invention is to shorten the manufacturing time by simplifying the structure of the pre-molded rubber insulating cylinder and to reduce the rubber insulating cylinder. Is made compact, the assembling work of the connecting portion is simplified, and the cost required for forming the connecting portion is reduced.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明においては、従来、電界遮蔽，電界コント
ロール用に必要であったゴム絶縁筒の埋込電極層をシー
ト状にして製造しやすくし、シート電極両端上に、比誘
電率の高い絶縁層を設けて、電界をコントロールするも
のである。In order to achieve the above object, in the present invention, the embedded electrode layer of the rubber insulating cylinder, which was conventionally required for electric field shielding and electric field control, is manufactured in a sheet form. In order to facilitate the process, an insulating layer having a high relative dielectric constant is provided on both ends of the sheet electrode to control the electric field.
【０００８】本発明のプレモールドゴム絶縁筒は、ゴム
系材料をベースにして形成された内部電極層、補強絶縁
層および外部半導電層を有したプラスチック絶縁電力ケ
ーブル接続用のプレモールドゴム絶縁筒において、前記
内部電極層を断面が薄いシート状の層として形成され、
電極先端の電界集中を緩和する効果として少なくともこ
のシート状内部電極層の両端にあって、かつケーブルと
の界面上に突出して少なくとも比誘電率１０程度の高誘
電率絶縁層が形成されてなることを特徴とする。The pre-molded rubber insulation tube of the present invention is a pre-molded rubber insulation tube for connecting a plastic insulated power cable, which has an internal electrode layer, a reinforcing insulation layer and an external semi-conductive layer formed on the basis of a rubber material. In, the internal electrode layer is formed as a sheet-like layer having a thin cross section,
As an effect of alleviating the electric field concentration at the tip of the electrode, a high dielectric constant insulating layer having a relative dielectric constant of at least about 10 is formed at both ends of the sheet-shaped internal electrode layer and protruding on the interface with the cable. Is characterized by.
【０００９】また、界面方向の電界を低減するために前
記高誘電率絶縁層とケーブル絶縁体との界面長さＸをゴ
ム絶縁筒の絶縁界面に、少なくとも５mm突出させたこと
を特徴とする。Further, in order to reduce the electric field in the interface direction, the interface length X between the high dielectric constant insulating layer and the cable insulator is projected at least 5 mm from the insulating interface of the rubber insulating cylinder.
【００１０】また、本発明のプラスチック絶縁電力ケー
ブル接続部は、前記プレモールドゴム絶縁筒を、ケーブ
ルの端部を段剥ぎして露出した導体の接続部、その両側
のケーブル絶縁体および外部半導電層を覆うように装着
したことを特徴とする。In the plastic insulated power cable connecting portion of the present invention, the premolded rubber insulating tube is connected to the connecting portion of the conductor exposed by stripping off the end portion of the cable, the cable insulating material on both sides of the connecting portion, and the external semiconductive material. It is characterized in that it is attached so as to cover the layers.
【００１１】[0011]
【発明の実施の形態】本発明の実施の形態を図面を参照
しながら説明する。図１は本発明に係るプレモールドゴ
ム絶縁筒１０の構成を示す断面図である。このプレモー
ルドゴム絶縁筒１０は、絶縁性能が高く、また成形加工
性に優れたエチレンプロピレンゴムをベースゴムとして
使用し、シート状内部電極層１１、高ε絶縁層１２、絶
縁層１３および外部半導電層１４が一体的にモールド成
形された、全体で１つの部品（１ピース）で構成されて
いる。このゴム絶縁筒１０の成形は、金型中子に導電ゴ
ムテープと高誘電体ゴムテープを巻きつけたうえで金型
（外型）をセットして、あるいは、導電ゴムチューブと
高誘電体ゴムチューブを予め押出し成形しておき、これ
を金型中子にセットしたうえで金型をセットして、金型
内に絶縁ゴムおよび半導電ゴムを押出し機から充填して
絶縁層および外部半導電層を成形したのち、加熱モール
ドするものである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the structure of a premolded rubber insulating cylinder 10 according to the present invention. This pre-molded rubber insulating cylinder 10 uses ethylene propylene rubber as a base rubber, which has high insulation performance and excellent molding processability, and has a sheet-shaped internal electrode layer 11, a high ε insulating layer 12, an insulating layer 13 and an outer half. The conductive layer 14 is integrally molded and is composed of one part (one piece) as a whole. The rubber insulating cylinder 10 is molded by winding a conductive rubber tape and a high dielectric rubber tape around a mold core and then setting the mold (outer mold), or by using a conductive rubber tube and a high dielectric rubber tube. Extruded in advance, set it in the mold core, set the mold, and then fill the mold with insulating rubber and semiconductive rubber from the extruder to form the insulating layer and the external semiconductive layer. After molding, it is heat-molded.
【００１２】実施例のプレモールドゴム絶縁筒１０で
は、シート状内部電極層１１の厚さは３ｍｍ程度であ
り、また、高ε絶縁層１２の突出部の長さＸは１０mm程
度である。In the premolded rubber insulating cylinder 10 of the embodiment, the thickness of the sheet-shaped internal electrode layer 11 is about 3 mm, and the length X of the protruding portion of the high ε insulating layer 12 is about 10 mm.
【００１３】なお、図面では、高ε絶縁層１２を内部電
極層１１の両端にのみ形成しているが、内部電極層１１
の上全域に設けて一体にしてもよい。Although the high ε insulating layer 12 is formed only on both ends of the internal electrode layer 11 in the drawing, the internal electrode layer 11 is not shown.
It may be provided over the entire area above and integrated.
【００１４】また、高ε絶縁層１２の突出部の長さＸ
は、ゴム絶縁筒１０のストレスコーン立上げ部の電界を
乱さないためにも界面長Ｌの半分以下にすべきである。Further, the length X of the protruding portion of the high ε insulating layer 12
Should be less than half of the interface length L in order not to disturb the electric field at the stress cone rising portion of the rubber insulating cylinder 10.
【００１５】次に、本発明に係るプラスチック絶縁電力
ケーブル接続部について説明する。Next, the plastic insulated power cable connecting portion according to the present invention will be described.
【００１６】図２は前述のプレモールドゴム絶縁筒１０
を用いたプラスチック絶縁電力ケーブルの中間接続部Ｎ
の主要構成を示す断面図である。この接続部Ｎは、双方
のプラスチック絶縁電力ケーブルの端部が段剥ぎされて
露出した導体１の端部を導体接続管４の両側から挿入
し、これを圧縮することにより形成された導体接続部と
その両側のケーブル絶縁体２を覆い、且つケーブル外部
半導電層３に跨るように、これらの外周に装着されたプ
レモールドゴム絶縁筒１０とで構成される。なお、符号
５は導体１とプレモールドゴム絶縁筒１０の内部電極層
１１とを電気的に接続する金属製または導電性ゴムの導
体接続管カバーである。さらに図示していないが、外側
には全体を覆うように保護カバーおよびその両端とケー
ブル間を液密に密封する防水処理部が設けられている。FIG. 2 shows the pre-molded rubber insulating cylinder 10 described above.
Middle connection part N of plastic insulated power cable using
It is a sectional view showing the main composition of. This connecting portion N is a conductor connecting portion formed by inserting the end portions of the conductor 1 in which the end portions of both plastic insulated power cables have been stripped off into the conductor connecting pipe 4 from both sides and compressing the end portions. And a premolded rubber insulating tube 10 attached to the outer circumference of the cable insulating body 2 on both sides thereof and so as to extend over the cable outer semiconductive layer 3. Reference numeral 5 is a conductor connection tube cover made of metal or conductive rubber that electrically connects the conductor 1 and the internal electrode layer 11 of the premolded rubber insulating cylinder 10. Although not shown in the figure, a protective cover is provided on the outside so as to cover the whole, and a waterproofing part is provided for liquid-tightly sealing between both ends of the protective cover and the cable.
【００１７】[0017]
【発明の効果】本発明によれば、プレモールドゴム絶縁
筒の内部電極層をシート状にすることにより製造しやす
くしたので、各層ごとの金型は不要となり、製作時間，
製造コストは大幅に低減できる。According to the present invention, since the internal electrode layers of the pre-molded rubber insulating cylinder are made into a sheet shape to facilitate the manufacture, a mold for each layer is not required, and the manufacturing time is reduced.
Manufacturing costs can be significantly reduced.
【００１８】また、シート状内部電極層の両端の界面上
に高誘電率絶縁層を形成されていることからシート状内
部電極層の先端部分の電界を緩和することができ、その
結果、前記ゴム絶縁筒の寸法をコンパクトにし、その取
扱いが容易になる。また、このゴム絶縁筒を用いたプラ
スチック絶縁電力ケーブル接続部の小型化を図ることが
でき、現場における作業能率を高めると共に、接続部の
設置スペースも小さくできる。Further, since the high dielectric constant insulating layer is formed on the interface between both ends of the sheet-shaped internal electrode layer, the electric field at the tip portion of the sheet-shaped internal electrode layer can be relaxed, and as a result, the rubber is The size of the insulating cylinder is made compact and its handling becomes easy. Further, the plastic insulated power cable connecting portion using this rubber insulating tube can be downsized, the work efficiency in the field can be improved, and the installation space of the connecting portion can be reduced.
【図１】本発明に係るプレモールドゴム絶縁筒の半部縦
断面図である。FIG. 1 is a longitudinal sectional view of a half portion of a premolded rubber insulating cylinder according to the present invention.
【図２】本発明に係るプラスチック絶縁電力ケーブル接
続部の主要構成を示す半部断面図である。FIG. 2 is a half sectional view showing a main configuration of a plastic insulated power cable connecting portion according to the present invention.
【図３】従来のプレモールドゴム絶縁筒を用いたＣＶケ
ーブル接続部の半部断面図である。FIG. 3 is a half sectional view of a CV cable connecting portion using a conventional premolded rubber insulating tube.
Ｎ…中間接続部 １…ケーブル導体 ２…ケーブル絶縁体 ３…ケーブル外部半導電層 ４…導体接続管 １０…プレモールドゴム絶縁筒 １１…内部電極層 １２…高誘電率絶縁層 １３…絶縁層 １４…外部半導電層 N ... Intermediate connection 1 ... Cable conductor 2 ... Cable insulator 3 ... Cable outer semiconductive layer 4 ... Conductor connection tube 10 ... Premolded rubber insulation tube 11 ... Internal electrode layer 12 ... High dielectric constant insulating layer 13 ... Insulating layer 14 ... External semiconductive layer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5E085 BB06 DD05 DD16 EE11 FF01 GG11 GG16 JJ17 JJ36 JJ38 JJ50 5G355 AA03 BA01 BA15 5G375 AA02 BA26 BB43 CA02 CA14 CB03 CB07 CB18 CB39 CB53 DB32 ─────────────────────────────────────────────────── ─── Continued front page F term (reference) 5E085 BB06 DD05 DD16 EE11 FF01 GG11 GG16 JJ17 JJ36 JJ38 JJ50 5G355 AA03 BA01 BA15 5G375 AA02 BA26 BB43 CA02 CA14 CB03 CB07 CB18 CB39 CB53 DB32
Claims (3)
部電極層、補強絶縁層および外部半導電層を有したプラ
スチック絶縁電力ケーブル接続用のプレモールドゴム絶
縁筒において、 前記内部電極層を断面が薄いシート状の層として形成さ
れ、少なくともこのシート状内部電極層の両端にあっ
て、かつ、ケーブルとの界面上に突出して少なくとも比
誘電率１０程度の高誘電率絶縁層が形成されてなること
を特徴とするプレモールドゴム絶縁筒。1. A pre-molded rubber insulation tube for connecting a plastic insulated power cable, which has an internal electrode layer formed of a rubber material as a base, a reinforced insulating layer and an external semiconductive layer, wherein the internal electrode layer is cross-sectioned. Is formed as a thin sheet-like layer, and a high-dielectric-constant insulating layer having a relative dielectric constant of at least 10 is formed at least at both ends of the sheet-like internal electrode layer and projecting on the interface with the cable. A pre-molded rubber insulating tube characterized by the above.
の界面長さＸをゴム絶縁筒の絶縁界面に、少なくとも５
mm突出させたことを特徴とする請求項１記載のプレモー
ルドゴム絶縁筒。2. The interface length X between the high dielectric constant insulating layer and the cable insulator is at least 5 at the insulating interface of the rubber insulating cylinder.
The premolded rubber insulating cylinder according to claim 1, wherein the premolded rubber insulating cylinder is projected by mm.
ールドゴム絶縁筒を、ケーブルの端部を段剥ぎして露出
した導体の接続部、その両側のケーブル絶縁体および外
部半導電層を覆うように装着したことを特徴とするプラ
スチック絶縁電力ケーブル接続部。3. The pre-molded rubber insulating tube according to claim 1 or 2, wherein a conductor connecting portion exposed by stripping off an end portion of the cable, a cable insulator on both sides thereof and an external semiconductive layer are provided. A plastic insulated power cable connection characterized by being installed so as to cover it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001319458A JP3766307B2 (en) | 2001-10-17 | 2001-10-17 | Plastic insulated power cable connection using pre-molded rubber insulation cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001319458A JP3766307B2 (en) | 2001-10-17 | 2001-10-17 | Plastic insulated power cable connection using pre-molded rubber insulation cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003134655A true JP2003134655A (en) | 2003-05-09 |
| JP3766307B2 JP3766307B2 (en) | 2006-04-12 |
Family
ID=19137009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001319458A Expired - Fee Related JP3766307B2 (en) | 2001-10-17 | 2001-10-17 | Plastic insulated power cable connection using pre-molded rubber insulation cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3766307B2 (en) |
-
2001
- 2001-10-17 JP JP2001319458A patent/JP3766307B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3766307B2 (en) | 2006-04-12 |
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