JPH0225152Y2 - - Google Patents
Info
- Publication number
- JPH0225152Y2 JPH0225152Y2 JP1983040937U JP4093783U JPH0225152Y2 JP H0225152 Y2 JPH0225152 Y2 JP H0225152Y2 JP 1983040937 U JP1983040937 U JP 1983040937U JP 4093783 U JP4093783 U JP 4093783U JP H0225152 Y2 JPH0225152 Y2 JP H0225152Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- swelling
- fibrous base
- layer
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 17
- 230000008961 swelling Effects 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 2
- 229920005594 polymer fiber Polymers 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 carboxymethyl ether sodium chloride Chemical compound 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002651 laminated plastic film Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Description
【考案の詳細な説明】
［考案の技術分野］
本考案は外部からの水の浸入を検知する機構を
備えたケーブルに関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a cable equipped with a mechanism for detecting water intrusion from the outside.
［考案の技術的背景とその問題点］
従来から電力ケーブルおよび通信ケーブルとし
て、外部から絶縁体部分への水の浸入を防止する
ために、シースの内側に遮水層を設けた構造のケ
ーブルが用いられている。[Technical background of the invention and its problems] Conventionally, power cables and communication cables have a structure in which a water-blocking layer is provided inside the sheath to prevent water from entering the insulator from the outside. It is used.
しかしながらこのようなケーブルにおいては、
絶縁コア上にプラスチツクラミネート金属テープ
を縦添えし重なり部を融着一体化させることによ
り遮水層が形成されているため、融着が不完全だ
つたり、ラミネートされたプラスチツクフイルム
が劣化したり、金属テープ部分が外傷を受けたり
した場合には、ここから水が遮水層内側に浸入
し、軸方向に走水してケーブルの電気特性を低下
させるという問題があつた。 However, in such cables,
A water-blocking layer is formed by vertically attaching a plastic laminated metal tape onto an insulating core and fusing and integrating the overlapping parts, so there is a possibility that the fusing may be incomplete or the laminated plastic film may deteriorate. When the metal tape part is damaged, water enters the inside of the water-shielding layer and travels in the axial direction, degrading the electrical characteristics of the cable.
また近年絶縁コアの撚合せ間にペトロラタム系
あるいはポリブデン系のジエリー状防水混和物を
注入充填すると共に、その上に抑えテープ巻回層
および遮水層を順に設けた構造の通信ケーブルが
開発されている。 In addition, in recent years, communication cables have been developed in which a petrolatum-based or polybdenum-based waterproof gelatinous mixture is injected and filled between the strands of the insulating core, and a tape-wrapped layer and a water-blocking layer are sequentially provided on top of this. There is.
しかしこのようなケーブルにおいても、防水混
和物の注入充填作業を高温下で行なつているた
め、注入後の冷却過程で防水混和物が徐々に収縮
しその結果抑えテープ巻回層と遮水層との間に空
〓が生じ易く、水の浸入を放置しておくときは、
水がこの空〓を通り軸方向に伝わりケーブルの電
気特性を低下させるという問題があつた。 However, even in such cables, the waterproofing mixture is injected and filled at high temperatures, so the waterproofing mixture gradually shrinks during the cooling process after injection, resulting in damage to the tape wrapping layer and the water-shielding layer. If water is left unattended and water is left unattended,
There was a problem in that water was transmitted through this air in the axial direction, deteriorating the electrical characteristics of the cable.
［考案の目的］
本考案はこれらの問題を解決するためになされ
たもので、遮水層が破損し水が浸入した場合にこ
れが軸方向に伝播することがなく、しかもこの水
の浸入をいち早く検知することができるケーブル
を提供することを目的とする。[Purpose of the invention] The present invention was made to solve these problems.If the impermeable layer is damaged and water intrudes, this will not propagate in the axial direction, and moreover, it will prevent this water from entering as quickly as possible. The purpose is to provide a cable that can be detected.
［考案の概要］
本考案は、絶縁コア上に、感圧導電体層と、吸
水時厚さ方向に初期厚の２倍以上に膨潤する吸水
膨潤性繊維質基材層とを順に設け、この上に金属
テープの片面あるいは両面にプラスチツクフイル
ムをラミネートしたテープを縦沿えし重なり部を
融着して遮水層を形成し、さらにこの上にシース
を施してなる、遮水能および浸水検知能を有する
浸水検知ケーブルである。[Summary of the invention] The present invention provides a pressure-sensitive conductor layer and a water-swellable fibrous base material layer that swells in the thickness direction to more than twice its initial thickness upon water absorption on an insulating core. A tape with plastic film laminated on one or both sides of the metal tape is placed vertically on top of the metal tape, and the overlapping parts are fused to form a water-blocking layer, and a sheath is further applied on top of this to provide water-blocking ability and water intrusion detection. This is a water immersion detection cable with
［考案の実施例］
以下本考案の一実施例を図面を参照しながら説
明する。[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings.
本考案においては、図示するように、導体上に
絶縁体を被覆してなる、単心もしくは多心の絶縁
コア１上に、感圧導電体層２および吸水膨潤性繊
維質基材層３が順に設けられている。また感圧導
電体層２の上下両表面には、厚さ方向の電気抵抗
を測定するための銅テープ電極４，４′が長手方
向に沿つて配設されている。 In the present invention, as shown in the figure, a pressure-sensitive conductor layer 2 and a water-swellable fibrous base material layer 3 are provided on a single or multi-core insulating core 1, which is a conductor coated with an insulator. They are arranged in order. Further, copper tape electrodes 4, 4' are arranged along the longitudinal direction on both the upper and lower surfaces of the pressure-sensitive conductor layer 2 for measuring the electrical resistance in the thickness direction.
本考案に使用する感圧導電体としては、例えば
天然ゴム、スチレン−ブタジエンゴム、軟質ポリ
塩化ビニル樹脂、シリコンゴム等のベースゴム中
に、カーボン、ニツケル、黒鉛等の導電性粒子を
所定の割合で分散させた公知のものを使用するこ
とができる。これらの感圧導電体をテープ状に成
形し、これを絶縁コア１の全周もしくは一部の外
周に巻回あるいは縦添えさせて感圧導電体層２が
形成される。 The pressure-sensitive conductor used in the present invention is a base rubber such as natural rubber, styrene-butadiene rubber, soft polyvinyl chloride resin, silicone rubber, etc., and a predetermined proportion of conductive particles such as carbon, nickel, and graphite. It is possible to use known ones dispersed in . These pressure-sensitive conductors are formed into a tape shape, and the pressure-sensitive conductor layer 2 is formed by winding or vertically attaching the tape around the entire circumference or a part of the outer circumference of the insulating core 1.
また本考案に使用する吸水膨潤性繊維質基材と
しては、自重の２倍以上、より好ましくは３倍以
上の水を吸収し、厚さ方向に初期厚さの２倍以上
に膨潤してその内側に設けられた感圧導電体層２
に0.2Kg／cm2以上、より好ましくは0.5Kg／cm2以上
の圧力を加えることのできるものが適している。 In addition, the water-absorbing and swelling fibrous base material used in the present invention absorbs at least twice its own weight, more preferably at least three times its own weight, and swells in the thickness direction to at least twice its initial thickness. Pressure-sensitive conductor layer 2 provided inside
A suitable material is one that can apply a pressure of 0.2 Kg/cm 2 or more, more preferably 0.5 Kg/cm 2 or more.
このような吸水膨潤性繊維質基材としては、例
えば２枚の不織布の間に吸水膨潤性ポリマーをは
さんで積層一体化した積層不織布、繊維分子がカ
ルボキシメチルエーテルのナトリウム塩化
（CMC化）された、それ自体吸水膨潤性を有する
不織布、あるいは前記吸水膨潤性不織布に補強剤
を介在させたりもしくは他の繊維質基材と貼り合
せて機械的強度をさらに向上させた複合繊維質基
材を用いることができる。 Examples of such water-absorbing and swelling fibrous base materials include, for example, laminated nonwoven fabrics made by sandwiching a water-absorbing and swelling polymer between two nonwoven fabrics, and fabrics in which the fiber molecules are converted into carboxymethyl ether sodium chloride (CMC). In addition, a nonwoven fabric that itself has water absorption and swelling properties, or a composite fibrous base material whose mechanical strength is further improved by interposing a reinforcing agent in the water absorption and swelling nonwoven fabric or bonding it with another fibrous base material is used. be able to.
これらの吸水膨潤性繊維質基材は、テープ状に
成形したものを前記感圧導電体層２の上に巻回あ
るいは縦添えして用いられる。 These water-absorbing and swelling fibrous base materials are formed into a tape shape and used by being wound or vertically attached on the pressure-sensitive conductor layer 2.
このように構成された吸水膨潤性繊維質基材層
３の上に遮水層５が設けられ、さらにその上には
シース６が設けられている。 A water-blocking layer 5 is provided on the water-absorbing and swelling fibrous base layer 3 configured as described above, and a sheath 6 is further provided on top of the water-blocking layer 5.
ここで遮水層５は、アルミニウムや鉛のような
金属テープの片面あるいは両面にプラスチツクフ
イルムをラミネートしたテープを縦添えし重なり
部を融着することにより形成される。 Here, the water-blocking layer 5 is formed by longitudinally attaching a tape made of a metal such as aluminum or lead with a plastic film laminated on one or both sides, and fusing the overlapping portions.
以上のように構成された本考案の浸水検知ケー
ブルにおいては、遮水層５の下層に吸水膨潤性繊
維質基材層３が設けられているので、万一遮水層
５が破損してケーブル内に浸水してもただちに吸
水膨潤性繊維質基材層３により完全に吸収され、
かつ吸水膨潤性繊維質基材層３が膨潤して走水通
路を閉塞するのでケーブルの軸方向に水が伝播す
ることがない。 In the water immersion detection cable of the present invention constructed as described above, the water-absorbing and swelling fibrous base material layer 3 is provided below the water-shielding layer 5, so in the unlikely event that the water-shielding layer 5 is damaged and the cable Even if water enters the inside, it is immediately completely absorbed by the water-absorbing and swelling fibrous base material layer 3,
Moreover, since the water-absorbing and swelling fibrous base material layer 3 swells and closes the water running passage, water does not propagate in the axial direction of the cable.
またこの吸水膨潤性繊維質基材層３のすぐ内側
には感圧導電体層２が設けられているので、浸水
により吸水膨潤性繊維質基材層３が厚さ方向に膨
潤すると感圧導電体層２が加圧されてその電気抵
抗が変化し、この感圧導電体層２の電気抵抗の変
化を検出することにより浸水の有無を検知するこ
とができる。したがつて遮水層５からの水の浸入
を早期に発見することができ、適切な措置を講じ
て被害を最小限にくい止めることができる。 In addition, since the pressure-sensitive conductor layer 2 is provided immediately inside this water-absorbing and swelling fibrous base material layer 3, when the water-absorbing and swelling fibrous base material layer 3 swells in the thickness direction due to water intrusion, the pressure-sensitive conductor layer 3 becomes a pressure-sensitive conductor. When the body layer 2 is pressurized, its electrical resistance changes, and by detecting this change in the electrical resistance of the pressure-sensitive conductor layer 2, it is possible to detect whether or not water has entered. Therefore, intrusion of water from the impermeable layer 5 can be detected at an early stage, and appropriate measures can be taken to minimize damage.
［考案の効果］
以上説明したように、本考案の浸水検知ケーブ
ルは長手方向の走水防止特性に優れ、しかも内部
への水の浸入を早期に検知することができる。[Effects of the Invention] As explained above, the water intrusion detection cable of the present invention has excellent properties to prevent water running in the longitudinal direction, and can detect water intrusion into the interior at an early stage.
図面は本考案の構造を説明するためにケーブル
を段剥ぎして示す斜視図である。
１……絶縁コア、２……感圧導電体層、３……
吸水膨潤性繊維質基材層、５……遮水層、６……
シース。
The drawing is a perspective view of the cable with sections removed to explain the structure of the present invention. 1... Insulating core, 2... Pressure-sensitive conductor layer, 3...
Water-absorbing and swelling fibrous base material layer, 5... Water-blocking layer, 6...
sheath.
Claims (1)
方向に初期厚の２倍以上に膨潤する吸水膨潤性
繊維質基材層とを順に設け、この上に金属テー
プの片面あるいは両面にプラスチツクフイルム
をラミネートしたテープを縦沿えし重なり部を
融着して遮水層を形成し、さらにこの上にシー
スを施してなることを特徴とする浸水検知ケー
ブル。 (2) 吸水膨潤性繊維質基材が、不織布と吸水膨潤
性ポリマーとを積層してなる複合テープである
実用新案登録請求の範囲第１項記載の浸水検知
ケーブル。 (3) 吸水膨潤性繊維質基材が、吸水膨潤性ポリマ
ー繊維を集合結着して構成された不織布である
実用新案登録請求の範囲第１項記載の浸水検知
ケーブル。[Scope of Claim for Utility Model Registration] (1) A pressure-sensitive conductor layer and a water-absorbing swellable fibrous base material layer that swells to twice or more of the initial thickness in the thickness direction upon absorbing water are provided in this order on an insulating core. , a tape made by laminating a plastic film on one or both sides of a metal tape is placed vertically on top of the metal tape, the overlapping parts are fused to form a water-blocking layer, and a sheath is further applied on top of this. detection cable. (2) The water immersion detection cable according to claim 1, wherein the water-absorbing and swelling fibrous base material is a composite tape formed by laminating a nonwoven fabric and a water-absorbing and swelling polymer. (3) The water immersion detection cable according to claim 1, wherein the water-absorbing and swelling fibrous base material is a nonwoven fabric formed by collectively binding water-absorbing and swelling polymer fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4093783U JPS59146750U (en) | 1983-03-22 | 1983-03-22 | Water immersion detection cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4093783U JPS59146750U (en) | 1983-03-22 | 1983-03-22 | Water immersion detection cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59146750U JPS59146750U (en) | 1984-10-01 |
| JPH0225152Y2 true JPH0225152Y2 (en) | 1990-07-11 |
Family
ID=30171539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4093783U Granted JPS59146750U (en) | 1983-03-22 | 1983-03-22 | Water immersion detection cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59146750U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146684A (en) * | 1976-06-01 | 1977-12-06 | Yayoi Kikuchi | Fluid leakage detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153990U (en) * | 1974-06-07 | 1975-12-20 |
-
1983
- 1983-03-22 JP JP4093783U patent/JPS59146750U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146684A (en) * | 1976-06-01 | 1977-12-06 | Yayoi Kikuchi | Fluid leakage detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59146750U (en) | 1984-10-01 |
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