JPS59132708A - Explosion preventive sealing method for cable terminal by magnetic fluid - Google Patents
Explosion preventive sealing method for cable terminal by magnetic fluidInfo
- Publication number
- JPS59132708A JPS59132708A JP682783A JP682783A JPS59132708A JP S59132708 A JPS59132708 A JP S59132708A JP 682783 A JP682783 A JP 682783A JP 682783 A JP682783 A JP 682783A JP S59132708 A JPS59132708 A JP S59132708A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- cable
- sealing method
- cable terminal
- explosion
- 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
Landscapes
- Processing Of Terminals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は防爆用ケーブル系統の端末部のシーリング方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for sealing the terminal portion of an explosion-proof cable system.
防爆用ケーブル系統においては従来ケーブル自体の線心
間介在物に未加硫♂ムあるいはコン・ぐランＰの充実押
出しによりあるいはケーブル端末部をコンパウンドで密
封したりしてケーブル内を通じての可燃性ガスの移動を
防止して防爆効果を得ている。しかしながら、介在物に
防爆効果を生じさせるにはその材料を特殊なものとする
必要があり、保守が難かしくまた価格的にも不利である
。Conventionally, in explosion-proof cable systems, flammable gas is prevented from passing through the cable by extruding unvulcanized rubber or compound P into the inclusions between the cores of the cable itself, or by sealing the cable ends with compound. This provides an explosion-proof effect by preventing the movement of However, in order to produce an explosion-proof effect on the inclusion, it is necessary to use a special material, which makes maintenance difficult and disadvantageous in terms of cost.
一方、ケーブル端部のコンパランｒ密封によるものにお
いては、コンＡウンＰの経時劣化等による気密性の低下
が大きく、その低下の度合を監視する手段がない。On the other hand, in the case where the end of the cable is sealed with a comparator, the airtightness deteriorates significantly due to aging of the comparator P, and there is no means to monitor the degree of the deterioration.
本発明の目的は安価であシ気密性を監視することの可能
なケーブル端末部のシーリング方法を提供することであ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a method of sealing a cable end that is inexpensive and allows monitoring of airtightness.
以下、図面に示す本方法の実施形態にもとづき本発明を
詳述する。Hereinafter, the present invention will be explained in detail based on embodiments of the present method shown in the drawings.
第１図において、コア７および外被８を有するケーブル
の端末部を磁石１の空隙内に配置する。In FIG. 1, the end of the cable with core 7 and jacket 8 is placed in the air gap of magnet 1. In FIG.
ケーブル内、特にこの実施例においてはコア７と外被８
の間には磁性流体槽４から導管３を介して磁性流体２が
供給される。このようにして供給される磁性流体２は磁
石１の空隙における磁場により、磁極附近の磁力線に沿
って集中し、ケーブル端末部の密封効果を生じさせる。Inside the cable, in particular in this example the core 7 and the jacket 8
A magnetic fluid 2 is supplied from a magnetic fluid tank 4 through a conduit 3 between the two. The magnetic fluid 2 thus supplied is concentrated along the lines of magnetic force near the magnetic poles due to the magnetic field in the gap of the magnet 1, producing a sealing effect at the cable end.
何らかの理由によりこの附近の磁性流体の量が減少した
場合には導管３を介して磁性流体槽４から自動的に磁性
流体が補充されるようにする。If the amount of magnetic fluid in this vicinity decreases for some reason, the magnetic fluid is automatically replenished from the magnetic fluid tank 4 via the conduit 3.
一方、このような補充による磁性流体槽４内の流体レベ
ルの変化を適当な手段で監視する。第２図はこのような
磁性流体レベルを監視するだめの一方法を例示するもの
である。すなわち、磁性流体槽４を非磁性材料で形成し
、その周囲にコイル５を設け、槽４内の磁性流体の量の
変化をコイル５のインダクタンスの変化としてとらえる
ことにより、間接的にケーブル端末部の密封度を知るよ
うにしている。このような間接的な方法の他に端末部で
の直接監視も可能であることは当業者には明らかである
。On the other hand, changes in the fluid level in the magnetic fluid tank 4 due to such replenishment are monitored by appropriate means. FIG. 2 illustrates one method for monitoring such ferrofluid levels. That is, by forming the magnetic fluid tank 4 from a non-magnetic material and providing the coil 5 around it, and by interpreting the change in the amount of magnetic fluid in the tank 4 as a change in the inductance of the coil 5, the magnetic fluid tank 4 is indirectly connected to the cable end. I am trying to know the degree of sealing. It will be clear to those skilled in the art that in addition to this indirect method, direct monitoring at the terminal is also possible.
々お、第１図には１個のケーブル端末部のシーリングに
ついて述べたが、共通の磁性流体槽を用いて複数の端末
部のシーリングを行うことは容易である。そのような場
合には密封度の検出は第２図の方法によっても可能では
あるが、各端末部について直接監視する方が有利である
。Although FIG. 1 describes the sealing of one cable end, it is easy to seal a plurality of end parts using a common magnetic fluid bath. In such a case, although it is possible to detect the degree of sealing by the method shown in FIG. 2, it is more advantageous to directly monitor each terminal.
以上述べたように本発明によれば磁性流体を用いて安価
で信頼性の高いケーブルシーリングが与えられる。本発
明の方法は一般的なケーブルにも適用可能であり、また
、そのシーリング効果を常に監視出来ることによりケー
ブルの運用上極めて有利である。As described above, according to the present invention, inexpensive and highly reliable cable sealing can be provided using a magnetic fluid. The method of the present invention can be applied to general cables, and is extremely advantageous in terms of cable operation, since the sealing effect can be constantly monitored.
第１図は本発明の方法を用いたケーブル端末部のシーリ
ングを示す概略図、第２図はシーリング効果を監視する
だめの一手段を示す概略図である。
１・・・磁石、２・・・磁性流体、３・・・導管、４・
・・磁性流体槽、５・・・コイル。FIG. 1 is a schematic diagram illustrating the sealing of a cable end using the method of the invention, and FIG. 2 is a schematic diagram illustrating one means of monitoring the sealing effectiveness. 1... Magnet, 2... Magnetic fluid, 3... Conduit, 4...
...Magnetic fluid tank, 5...Coil.
Claims (1)
から導管を介して磁性流体を供給することより成る磁性
流体によるケーブル端末部の防爆シーリング方法。A method for explosion-proof sealing of a cable end using magnetic fluid, which comprises arranging a magnet at the cable end and supplying magnetic fluid into the cable from a magnetic fluid bath through a conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP682783A JPS59132708A (en) | 1983-01-18 | 1983-01-18 | Explosion preventive sealing method for cable terminal by magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP682783A JPS59132708A (en) | 1983-01-18 | 1983-01-18 | Explosion preventive sealing method for cable terminal by magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59132708A true JPS59132708A (en) | 1984-07-30 |
Family
ID=11649049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP682783A Pending JPS59132708A (en) | 1983-01-18 | 1983-01-18 | Explosion preventive sealing method for cable terminal by magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59132708A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008282720A (en) * | 2007-05-11 | 2008-11-20 | Yazaki Corp | Water stopping structure of wire and water stopping method of wire |
| JP2010114027A (en) * | 2008-11-10 | 2010-05-20 | Yazaki Corp | Water cut-off structure of wire material, and water cut-off method of wire material |
| JP2010136484A (en) * | 2008-12-02 | 2010-06-17 | Yazaki Corp | Water stop method for wire material |
-
1983
- 1983-01-18 JP JP682783A patent/JPS59132708A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008282720A (en) * | 2007-05-11 | 2008-11-20 | Yazaki Corp | Water stopping structure of wire and water stopping method of wire |
| JP2010114027A (en) * | 2008-11-10 | 2010-05-20 | Yazaki Corp | Water cut-off structure of wire material, and water cut-off method of wire material |
| JP2010136484A (en) * | 2008-12-02 | 2010-06-17 | Yazaki Corp | Water stop method for wire material |
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