JPS6231945Y2 - - Google Patents
Info
- Publication number
- JPS6231945Y2 JPS6231945Y2 JP1981139096U JP13909681U JPS6231945Y2 JP S6231945 Y2 JPS6231945 Y2 JP S6231945Y2 JP 1981139096 U JP1981139096 U JP 1981139096U JP 13909681 U JP13909681 U JP 13909681U JP S6231945 Y2 JPS6231945 Y2 JP S6231945Y2
- Authority
- JP
- Japan
- Prior art keywords
- shielding layer
- water
- metal
- layer
- bonded
- 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.)
- Expired
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- Insulated Conductors (AREA)
Description
【考案の詳細な説明】
本考案は、遮水形の電力ケーブルの改良に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in water-shielded power cables.
外部から侵入する水分により架橋ポリエチレン
絶縁層が水トリ−破壊の危険に曝されることか
ら、最外シースの直下に金属テープからなる遮水
層を施す提案がなされている。ところで、この遮
水層は、上記したようにシース直下の、換言すれ
ば電力ケーブルの最外部に近い位置に設けられる
ものであるから、電力ケーブルの屈曲の際に内部
層よりも大きな応力が加わる。しかも遮水層は金
属テープの縦沿えにより形成されるから、ケーブ
ル屈曲の際には上記した大きな応力によつて縦沿
えの重なり部が開く問題がある。重なり部が開く
と、そこから水の侵入が起こるため遮水層として
の機能を果さなくなる。 Since the cross-linked polyethylene insulating layer is exposed to the risk of water tree failure due to moisture entering from the outside, it has been proposed to provide a water-blocking layer made of metal tape directly under the outermost sheath. By the way, as mentioned above, this water-blocking layer is provided directly under the sheath, in other words, near the outermost part of the power cable, so when the power cable is bent, it is subjected to greater stress than the inner layer. . Furthermore, since the water-blocking layer is formed by vertically extending metal tapes, there is a problem in that when the cable is bent, the vertically overlapping portions open due to the above-mentioned large stress. If the overlapped portion opens, water will enter from there and it will no longer function as a water barrier layer.
上記に鑑み、本考案はケーブル屈曲によつても
金属遮水層の縦沿え重なり部の開口が生じ難い、
而して遮水性の改善された電力ケーブルを提案す
るものであつて、金属テープを縦沿えしてなる遮
水層は押出成形された絶縁遮蔽層と金属遮蔽層と
の間に施され、かつ該金属遮蔽層又は／及び絶縁
遮蔽層と半導電性の接着物質により接着されてな
ることを特徴とするものである。 In view of the above, the present invention is designed to prevent openings in the longitudinally overlapping parts of the metal water shielding layer even when the cable is bent.
Therefore, we propose a power cable with improved water-shielding properties, in which a water-shielding layer formed by vertically lining metal tape is applied between an extruded insulating shielding layer and a metal shielding layer, and It is characterized in that it is bonded to the metal shielding layer and/or the insulating shielding layer using a semiconductive adhesive substance.
付図は、本考案の一実施例の断面図であつて、
１は導体、２は導体遮蔽層、３は架橋ポリエチレ
ンなどの低乃至無極性有機高分子からなる絶縁
層、４は押出により形成された絶縁遮蔽層、５は
Al，Cu，Pb，Fe，Snあるいはその他の金属合金
のテープを縦沿えしてなる遮水層、６はCu，Al
などの導電性金属のテープ、ストランドなどから
なる金属遮蔽層、７はシースであつて遮水層５は
導電性の接着物質８により金属遮蔽層６と、ま
た、導電性の接着物質９により絶縁遮蔽層とそれ
ぞれ接着されている。また、遮水層５の縦沿え重
なり部は接着剤１０により接着されている。接着
物質８，９は、接着作用のほかに、絶縁遮蔽層４
と金属遮蔽層６とを電気的に導通させるために導
電度が10-7／cm程度以上の導電性を有するもの
が用いられる。たとえばエチレン−酢酸ビニル−
グリシジルメタクリレート共重合体、エチレン・
エチルアクリレート共重合体、エチレン・酢酸ビ
ニル共重合体等にカーボン粉末及び／又は金属粉
末を混入せしめたものがある。 The attached figure is a sectional view of one embodiment of the present invention,
1 is a conductor, 2 is a conductor shielding layer, 3 is an insulating layer made of a low to non-polar organic polymer such as cross-linked polyethylene, 4 is an insulating shielding layer formed by extrusion, and 5 is a conductor shielding layer.
Water-shielding layer made by vertically lining tapes of Al, Cu, Pb, Fe, Sn or other metal alloys, 6 is Cu, Al
A metal shielding layer 7 consisting of a conductive metal tape, strand, etc., is a sheath, and the water shielding layer 5 is insulated with the metal shielding layer 6 by a conductive adhesive substance 8 and also by a conductive adhesive substance 9. Each is bonded to a shielding layer. Further, the longitudinally overlapping portions of the water-blocking layer 5 are bonded together with an adhesive 10. In addition to their adhesive function, the adhesive substances 8 and 9 also serve as an adhesive for the insulating shielding layer 4.
A material having a conductivity of about 10 -7 /cm or more is used in order to electrically conduct the metal shielding layer 6 and the metal shielding layer 6 . For example, ethylene-vinyl acetate-
Glycidyl methacrylate copolymer, ethylene/
There are products in which carbon powder and/or metal powder is mixed into ethyl acrylate copolymer, ethylene/vinyl acetate copolymer, etc.
本考案においては遮水層５は図示する通りその
両面ともその内外層と接着している方が好ましい
が、その内側だけが絶縁遮蔽層４と接着している
か又はその外側だけが金属遮蔽層６と接着してい
る場合であつてもよい。 In the present invention, it is preferable that the water impermeable layer 5 is bonded to the inner and outer layers on both sides as shown in the figure, but it is also acceptable for only its inner side to be bonded to the insulating shielding layer 4 or only its outer side to be bonded to the metal shielding layer 6.
而して、本考案においては遮水層は、絶縁遮蔽
層又は／及び金属遮蔽層と接着しているので遮水
層縦沿え重なり部における開口の原因となり易い
ケーブル屈曲時の座屈が生じ難く、しかも遮水層
全体が金属遮蔽層により抑えられているので上記
した開口の問題が格段に改良される。 Therefore, in the present invention, since the water-shielding layer is bonded to the insulating shielding layer and/or the metal shielding layer, buckling when bending the cable, which tends to cause openings in the longitudinally overlapping portions of the water-shielding layer, is less likely to occur. Moreover, since the entire water-shielding layer is suppressed by the metal shielding layer, the above-mentioned problem of openings is significantly improved.
外径19mmの撚線導体の上に肉厚１mmの導体遮蔽
層、肉厚14mmの架橋ポリエチレン絶縁層、肉厚１
mmの架橋ポリエチレン−酢酸ビニル共重合体ベー
スの半導電性物質からなる押出絶縁遮蔽層からな
る単芯架橋ポリエチレン絶縁電力ケーブルを以下
のテスト対象として用い、その上に片面に厚さ50
μｍのエチレン−酢酸ビニル−グリシジルメタク
リレート共重合体にアルミ金属粉末を混入した導
電度10-3／cmの導電性接着剤層を有する厚さ50
μｍの鉛テープを接着剤層を絶縁遮蔽層側として
縦沿により遮水層を形成するとともに190℃に加
熱して遮水層と絶縁遮蔽層とを接着させた。更に
その上に厚さ100μｍの銅の金属遮蔽層及び肉厚
3.5mmのポリ塩化ビニルを設けた。このケーブル
を直径1200mmのマンドレルにまきつけ、往復10回
の屈曲を行つたあと、ケーブルを解体したところ
遮水層の縦沿え重なり部に開口はみられなかつ
た。上記ケーブル製造に代つて、上記銅テープを
逆に用いて遮水層と金属遮蔽層とを接着させた場
合、及びテープの両側に上記と同じ接着層を有す
る鉛テープを用いて遮水層を内外両面とも接着さ
せた場合も上記ケーブルと同等の耐屈曲性を示し
遮水層は安全であつた。これに対して、遮水層を
シースと金属遮蔽層との間にしかもシース、金属
遮蔽層のいずれとも接着させることなく設けた場
合には、上記屈曲試験により縦沿え重なり部に開
口が生じ、かつ遮水層の金属に亀裂が発生した。 A conductor shielding layer with a thickness of 1 mm on top of a stranded conductor with an outer diameter of 19 mm, a cross-linked polyethylene insulation layer with a thickness of 14 mm, and a thickness of 1 mm.
A single-core cross-linked polyethylene insulated power cable consisting of an extruded insulating shielding layer of cross-linked polyethylene-vinyl acetate copolymer-based semiconducting material of 50 mm thick was used as the test object below, and on one side a 50 mm thick
A 50 μm thick ethylene-vinyl acetate-glycidyl methacrylate copolymer mixed with aluminum metal powder and a conductive adhesive layer with a conductivity of 10 -3 /cm.
A water-shielding layer was formed by vertically running a μm lead tape with the adhesive layer on the insulating shielding layer side, and the water-shielding layer and the insulating shielding layer were bonded together by heating to 190°C. Furthermore, there is a 100 μm thick copper metal shielding layer and wall thickness.
Provided with 3.5mm PVC. This cable was wrapped around a mandrel with a diameter of 1200 mm and bent back and forth 10 times. When the cable was dismantled, no openings were found in the vertical overlap of the water shielding layer. Instead of the above cable manufacturing, the water-shielding layer and the metal shielding layer can be bonded by using the above-mentioned copper tape in reverse, and the water-blocking layer can be bonded by using a lead tape having the same adhesive layer as above on both sides of the tape. Even when both the inner and outer surfaces were bonded, the cable showed the same bending resistance as the above cable, and the water-blocking layer was safe. On the other hand, when the water shielding layer is provided between the sheath and the metal shielding layer without adhering to either the sheath or the metal shielding layer, an opening is formed in the longitudinally overlapping part by the above bending test. In addition, cracks occurred in the metal of the water shielding layer.
付図は本考案の一実施例の断面図であつて、４
は押出成形された絶縁遮蔽層、５は遮水層、６は
金属遮蔽層、及び８，９はいずれも導電性接着物
質の層である。
The attached figure is a sectional view of one embodiment of the present invention, and shows 4
5 is an extruded insulating shielding layer, 5 is a water shielding layer, 6 is a metal shielding layer, and 8 and 9 are both layers of conductive adhesive material.
Claims (1)
された絶縁遮蔽層と金属遮蔽層との間に施され、
かつ該金属遮蔽層又は／及び絶縁遮蔽層と導電性
の接着物質により接着されてなることを特徴とす
る電力ケーブル。 A water shielding layer made of vertically aligned metal tape is applied between the extruded insulating shielding layer and the metal shielding layer,
A power cable characterized in that the metal shielding layer and/or the insulating shielding layer are bonded to each other using a conductive adhesive substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13909681U JPS5843716U (en) | 1981-09-18 | 1981-09-18 | power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13909681U JPS5843716U (en) | 1981-09-18 | 1981-09-18 | power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5843716U JPS5843716U (en) | 1983-03-24 |
| JPS6231945Y2 true JPS6231945Y2 (en) | 1987-08-15 |
Family
ID=29932299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13909681U Granted JPS5843716U (en) | 1981-09-18 | 1981-09-18 | power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843716U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS527640Y2 (en) * | 1971-05-29 | 1977-02-17 |
-
1981
- 1981-09-18 JP JP13909681U patent/JPS5843716U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5843716U (en) | 1983-03-24 |
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