JPS58221142A - Leakage detecting element - Google Patents
Leakage detecting elementInfo
- Publication number
- JPS58221142A JPS58221142A JP10442682A JP10442682A JPS58221142A JP S58221142 A JPS58221142 A JP S58221142A JP 10442682 A JP10442682 A JP 10442682A JP 10442682 A JP10442682 A JP 10442682A JP S58221142 A JPS58221142 A JP S58221142A
- Authority
- JP
- Japan
- Prior art keywords
- case
- leakage
- expansion member
- permanent magnet
- reed switch
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
- G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、複数の断熱管を接続して成る断熱管路や建築
物における液体の漏洩の発生を検知するための漏洩検知
素子に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leak detection element for detecting the occurrence of liquid leakage in an insulated pipeline or building formed by connecting a plurality of insulated pipes.
例えば円管と、この内管に外嵌する外装部材と、これら
内管と外装部材との間隙に充填された断熱材とから成る
断熱管を複数本接続して断熱管路を構成した場合、この
断熱管路に液体の漏洩事故が発生しても、漏洩による影
響はなかなか外部に現われず、このため従来ではこのよ
うな断熱管路に漏洩事故が発生しても、その発生位置は
もちろん発生の事実さえも知ることができなかった。こ
れは特に断熱管路が埋設されている場合に顕著である。For example, when a heat insulating pipe line is constructed by connecting a plurality of heat insulating pipes each consisting of a circular pipe, an exterior member fitted onto the inner pipe, and a heat insulating material filled in the gap between the inner pipe and the exterior member, Even if a liquid leakage accident were to occur in this insulated pipe, the effects of the leak would not be readily apparent to the outside.For this reason, in the past, even if a leakage accident occurred in such an insulated pipe, the location and location of the leak could not be detected. I couldn't even know the facts. This is particularly noticeable when the insulated pipeline is buried.
このため、断熱管路に１箇所でも漏洩事故が発生すると
、その場所から断熱材が次第に破壊されてやがて全管路
に達し、断熱管路としての機能が完全に失われてしまう
。そして断熱材が破壊されたままさらに放置しておくと
、被輸送流体の温度が内管を介してそのまま外装部材に
達するため、外装部材に耐熱劇科を用いていない場合に
は、外装部材まで破壊されてしまう。したがって、従来
は断熱管路に漏洩事故が発生すると、全管路にわたって
新しいものと入れ替えなければならず、多くの費用と時
間とを要していｆＣ８
本発明は上記の点に鑑み、漏洩の発生を迅速かつ確実に
検知できる漏洩検知素子を得ることを目的とする。For this reason, if a leakage accident occurs at even one point in an insulated pipe, the insulation material is gradually destroyed from that location until it reaches all the pipes, and the function as an insulated pipe is completely lost. If the insulation material is left as it is, the temperature of the transported fluid will reach the exterior member directly through the inner pipe, so if the exterior member is not made of heat-resistant material, It will be destroyed. Therefore, conventionally, when a leakage accident occurs in an insulated pipe line, the entire pipe line must be replaced with a new one, which requires a lot of cost and time. The purpose of the present invention is to obtain a leakage detection element that can quickly and reliably detect leakage.
すなわち本発明は、液体を吸収することに」、シ体積が
膨張する膨張部材と、この膨張部材の膨張により移動せ
しめられる永久磁石と、前Ｈ１シ膨張部材の膨張時に前
記永久磁石により閉成せしめられるリードスイッチとを
、開口部を有するケース内に収納して成るものであり、
漏洩の発生により水あるいは油等の液体がケースの開口
部からケース内に流入し、これが膨張部材に吸収されて
膨張部材が膨張し、これにより永久磁石が移動してＩＪ
−ドスイッチの接点を閉成させるので、この接点の閉成
により漏洩の発生を迅速かつ確実に検知できるのである
。That is, the present invention provides a method for absorbing liquid, including an expansion member whose volume expands, a permanent magnet that is moved by the expansion of the expansion member, and a permanent magnet that is closed by the permanent magnet when the expansion member expands. A reed switch is housed in a case having an opening,
When a leak occurs, liquid such as water or oil flows into the case from the opening of the case, and this is absorbed by the expansion member, which expands, causing the permanent magnet to move and cause the IJ to move.
- Since the contact of the switch is closed, the occurrence of leakage can be quickly and reliably detected by closing this contact.
以下本発明の一実施例を図面に基づいて説明する。第１
図及び第２図において、（１）は長孔状の開口部（２）
を有する中空直方体状のケースであり、このケース（１
）は例えば合成樹脂等から成る。このケース（１）には
、長手方向に適当間隔をあけてストツバ（３ａ）（３ｂ
）が内嵌固着されていると共に、これらストッパ（３ａ
）（３ｂ）間に、液体を吸収することにより体積が大幅
に膨張し、かつ乾燥すれば元の状態に収縮する膨張部材
（４）と、永久磁石（５）と、コイルはね（６）とが配
置されている。前記膨張部材（４）及び永久磁石（５）
は、前記ケース（１）に摺動可能に内嵌しており、一端
が一方のストッパ（３ａ）に接当するコイルばワ（６）
により他方のストッパ（３り側へ付勢されている。（７
）は前記コイルばね（６） ［半径方向に間隔をあけて
内嵌する状態で配置されたリードスイッチであシ、前記
膨張部材（４）及び永久磁石（５）には膨張部材（４）
が膨張したときにリードリレー（７）が貫入する貫通孔
が形成されている。前記一方のストッパ（３ａ）とケー
ス（１）の一端壁（１ａ）との間には抵抗（８ａ）が配
置されておシ、前記他方のストッパ（３ｂ）とケース（
１）の他端壁（１ｂ）との間には抵抗（８′ｏ）が配置
されている。一方の抵抗（８ａ）の一端には、前記ケー
ス（１）の一端壁（１ａ）を貫通するリード線（９）が
接続されており、この抵抗（８ａ）の他端は、リード線
αＱを介して前記リードスイッチ（７）の一端に接続さ
れている。前記リード線吋は、リード線ａηを介して前
記他方の抵抗（８ｂ）の一端ｔｌｃ接続されておシ、こ
の抵抗（８ｂ）の他端には、前記ケース（１）の他端壁
（ｌｂ）を貫通するリード線Ｑ→が接続されている。前
記リードスイッチ（７）の他端には、前記ケース（１）
の他端壁（ｌｂ）を貫通するり−ドＭ（至）が接続され
ており、このリード線（至）には、前記ケース（１）の
一端壁（１ａ）を貫通するリード線α榎が接続されてい
る。前記リード線（１１） ｏ＜は、前記ケース（１）
の内面に形成された溝を通って前記ストッパ（３ａ）（
３ｂ）間を通過しており、前記リードｉＱＯは一方のス
トッパ（３ａ）の貫通孔を、また前記リード線（至）は
永久磁石（５）、膨張部材（４）、及び他方のストッパ
（３℃）の貫通孔をそれぞれ通過している。すなわち前
記抵抗（ｓａ）（８ｂ）及びリードスイッチ（７）は、
第３図に示すように、抵抗（８ａ）（８ｂ）か直列に接
続され、かつこれら抵抗（８ａ）（８ｂ）の接続点と共
通線との間にリードスイッチ（７）が接続されており、
抵抗（８ａ）（８ｂ）は互いに等しい抵抗値Ｒｏを有し
ている。An embodiment of the present invention will be described below based on the drawings. 1st
In the figure and Fig. 2, (1) is an elongated opening (2).
This case is a hollow rectangular parallelepiped case (1
) is made of, for example, synthetic resin. This case (1) has stoppers (3a) (3b) at appropriate intervals in the longitudinal direction.
) are internally fitted and fixed, and these stoppers (3a
) (3b) In between, there is an expanding member (4) whose volume expands significantly by absorbing liquid and which contracts to its original state when dried, a permanent magnet (5), and a coil spring (6). and are arranged. The expansion member (4) and the permanent magnet (5)
is a coil spring (6) which is slidably fitted into the case (1) and whose one end abuts one of the stoppers (3a).
The other stopper (3 is biased toward the 3rd side. (7)
) is the coil spring (6) [reed switch disposed in a radially spaced and fitted state, and the expansion member (4) and the permanent magnet (5) are connected to the expansion member (4).
A through hole is formed into which the reed relay (7) penetrates when the reed relay (7) expands. A resistor (8a) is disposed between the one stopper (3a) and one end wall (1a) of the case (1), and a resistor (8a) is arranged between the other stopper (3b) and the case (1).
1) A resistor (8'o) is arranged between the other end wall (1b). One end of one resistor (8a) is connected to a lead wire (9) that passes through one end wall (1a) of the case (1), and the other end of this resistor (8a) is connected to a lead wire αQ. It is connected to one end of the reed switch (7) through the reed switch. The lead wire 2 is connected to one end of the other resistor (8b) via the lead wire aη, and the other end of the resistor (8b) is connected to the other end wall (lb) of the case (1). ) is connected to the lead wire Q→ which passes through it. The case (1) is attached to the other end of the reed switch (7).
A lead M (to) that passes through the other end wall (lb) is connected, and a lead wire α that passes through the one end wall (1a) of the case (1) is connected to this lead wire (to). is connected. The lead wire (11) o< is the case (1)
The stopper (3a) (
3b), the lead iQO passes through the through hole of one stopper (3a), and the lead wire (to) passes through the permanent magnet (5), the expansion member (4), and the other stopper (3a). ℃) through the respective through holes. That is, the resistor (sa) (8b) and reed switch (7) are
As shown in Figure 3, resistors (8a) (8b) are connected in series, and a reed switch (7) is connected between the connection point of these resistors (8a) (8b) and a common line. ,
The resistors (8a) and (8b) have mutually equal resistance values Ro.
第４図は上記構成の漏洩検知素子に）を用いた漏洩検知
装置の等価回路図であり、各漏洩検知素子（１５，）〜
（１５ｎ）は、例えば断熱管路を構成する各断熱管の接
続部の断熱材に埋設されておシ、各断熱管の断熱材に埋
設されたリード線（１６ａ）（１６ｂ）により縦続接続
されている。そして断熱管路の一端側にて、リード線（
１７ａ）（１’ｉ’ｂ）を介して測定装置（至）に接続
されている。この測定装置（至）は、前記リード線（１
’ｉ’ａ）（１７ｂ）間に所定の電圧Ｅを供給する直流
あるいは交流の電源と、前記リード線（’１７ａ）（１
’７ｂ）を流れる電流工を計測する計測器とを備えてお
り、前記１ノード線（’１７＆）（１’？ｂ）間の抵抗
値を測定する機能を有している。さらにこの測定装置（
至）は、測定した抵抗値から漏洩事故の発生位置を演算
してその位置を表示部（１８ａ）にディジタル的に表示
し、かつ漏洩事故の発生を表示部（１８ａ ）の警報ラ
ンプあるいはブザー等で報知する機能をも有している。FIG. 4 is an equivalent circuit diagram of a leak detection device using the leak detection elements (15,) with the above configuration, and each leak detection element (15,) to
(15n) is, for example, buried in the heat insulating material at the connection part of each heat insulating pipe constituting the heat insulating pipe, and is cascade-connected by lead wires (16a) and (16b) buried in the heat insulating material of each heat insulating pipe. ing. Then, connect the lead wire (
17a) (1'i'b) to the measuring device (to). This measuring device (to) has the lead wire (1
A DC or AC power supply that supplies a predetermined voltage E between 'i'a) (17b) and the lead wire ('17a) (1
It has a function of measuring the resistance value between the 1-node wires ('17&) (1'?b). In addition, this measuring device (
(to) calculates the position where a leakage accident has occurred from the measured resistance value, displays the position digitally on the display section (18a), and displays an alarm lamp or buzzer on the display section (18a) to indicate the occurrence of a leakage accident. It also has a function to notify you.
いま、断熱管路の一端側からに番目の漏洩検知素子（：
Ｌ５ｋ）の近傍で漏洩事故が発生したとすると、漏洩し
た被輸送流体がケース（１）の開口部（２）からケース
（１）内に浸入し、膨張部材（４）に吸収される。これ
により膨張部材（４）が膨張するのであるが、このとき
膨張部材（４）は外周をケース（１）により囲まれかつ
他端面かストッパ（３ｂ）に接当しているので、コイル
ばね（６）の付勢力に抗して一端側へと膨張し、これに
より永久磁石（５）が移動してリードスイッチ（７）に
外嵌し、永久磁石（５）の磁界によシリードスイツチ（
７）が閉成する。すると、リード線（’ｌ’７ａ）（１
７ｂ）を流れる電流値がニー０から工＝ （２に−１，
）Ｒ，に変化し、測定装置ｆＱＩはこれによりに番目の
漏洩検知素子（１５ｋ）が動作したことを検出して、表
示部（ＩＳａ）に所定の表示を行なう。なお、電流計の
目盛から人為的に漏洩箇所を判断するような場合には、
リード線（１７ａ）（１７ｂ）の一方にダミー抵抗Ｒｏ
を挿入しておけば、電流値が工＝ ２ｋＲ，となり、計
算が容易である。Now, the leak detection element (:
If a leakage accident occurs near L5k), the leaked fluid to be transported infiltrates into the case (1) through the opening (2) of the case (1) and is absorbed by the expansion member (4). This causes the expansion member (4) to expand. At this time, the expansion member (4) is surrounded by the case (1) and its other end surface is in contact with the stopper (3b), so the coil spring ( The permanent magnet (5) moves and fits onto the reed switch (7), and the magnetic field of the permanent magnet (5) causes the series reed switch (
7) is closed. Then, the lead wire ('l'7a) (1
The current value flowing through 7b) is from knee 0 to k = (2 to -1,
)R, and the measuring device fQI detects that the leak detection element (15k) has operated, and displays a predetermined display on the display section (ISa). In addition, when determining the leakage location artificially from the scale of the ammeter,
A dummy resistor Ro is connected to one of the lead wires (17a) (17b).
If you insert , the current value becomes 2kR, which makes calculation easy.
このように、漏洩事故の発生によりリードスイッチ（７
）が閉成するので、漏洩事故の発生及びその位置を迅速
かつ確実に検知できる。また本実施例のように、互いに
抵抗値の等しい抵抗（８ａ）（８ｂ）を設ければ、各漏
洩検知素子（イ）を接続するに際して、リード線（９）
と（２）とを逆に接続してもよいので接続作業が容易で
ある。なお上記実施例においては、断熱管路に複数の漏
洩検知素子（至）を設けた例について説明したが、断熱
管路だけで雇く建築物内における配線が集中している箇
所に設置することにより雨水等の浸入を検知し漏電事故
の発生を未然に防止することができる。In this way, due to the occurrence of a leakage accident, the reed switch (7
) is closed, the occurrence and location of a leakage accident can be detected quickly and reliably. Furthermore, as in this embodiment, if the resistors (8a) and (8b) having the same resistance value are provided, when connecting each leak detection element (a), the lead wire (9)
Since and (2) may be connected in reverse, the connection work is easy. Although the above embodiment describes an example in which a plurality of leakage detection elements (to) are installed in an insulated conduit, it may be installed in a location where wiring is concentrated in a building that uses only an insulated conduit. This makes it possible to detect the intrusion of rainwater, etc. and prevent electrical leakage accidents from occurring.
第６図及び第６図は別の実施例を示しており、このよう
に、例えば多孔板等のように通水性を有する材料から成
る一端が閉塞された筒状の案内部材Ｈに膨張部材（ホ）
を挿入し、この膨張部材−の一端を案内部材α侭の一１
４１！壁（１９ａ）に固着すると共に、膨張部材翰の他
端に永久磁石←ηを固着し、膨張部材（イ）の膨張によ
）永久磁石りｐがリードスイッチ（７）の側方に移動す
るように構成してもよい。FIG. 6 and FIG. 6 show another embodiment, in which the expansion member ( e)
Insert one end of this expansion member into the guide member α
41! At the same time as fixing it to the wall (19a), a permanent magnet ←η is fixed to the other end of the expansion member (a), and as the expansion member (a) expands, the permanent magnet (p) moves to the side of the reed switch (7). It may be configured as follows.
以上説明したように、本発明にかかる漏洩検知素子によ
れば、漏洩の発生により水あるいは油等の液体がケース
の開口部からケース内に流入し、これが膨張部材に吸収
されて膨張部材が膨張し、これにより永久磁石が移動し
てリードスイッチの接点を閉成させるので、この接点の
閉成により漏洩の発生を迅速かつ確実゛に検知し得る。As explained above, according to the leak detection element of the present invention, when a leak occurs, liquid such as water or oil flows into the case from the opening of the case, and this is absorbed by the expansion member, causing the expansion member to expand. However, since this causes the permanent magnet to move and close the contact of the reed switch, the occurrence of leakage can be quickly and reliably detected by closing this contact.
第１図は本発明の一実施例における漏洩検知水子の平面
図、第２図は同横断平面図、第３図は同等価回路図、第
４図は複数の漏洩検知素子を断熱管路にセットした状態
の等価団路図、第５図は別の実施例における漏洩検知素
子の非動作状態の横断平面図、第６図は同漏洩検知素子
の動作状態の横断平面図である。
（１）・・・ケース、（２）・・・開口部、（４）（ホ
）・・・膨張部材、（５）（ハ）・・・永久磁石、（７
）・・・リードスイッチ代理人 森 本 義
弘
第１頁の続き
■出 願 人 株式会社啓明電装
大阪市東住吉区桑津３丁目７番
５号Fig. 1 is a plan view of a leak detection water element according to an embodiment of the present invention, Fig. 2 is a cross-sectional plan view thereof, Fig. 3 is an equivalent circuit diagram, and Fig. 4 shows a plurality of leak detection elements arranged in an insulated pipe. FIG. 5 is a cross-sectional plan view of the leak detection element in a non-operating state in another embodiment, and FIG. 6 is a cross-sectional plan view of the same leak detection element in an operating state. (1) Case, (2) Opening, (4) (E) Expansion member, (5) (C) Permanent magnet, (7
)... Reed Switch Agent Yoshi Morimoto
Continuing from page 1 of Hiroshi ■Applicant: Keimei Denso Co., Ltd. 3-7-5 Kuwazu, Higashi-Sumiyoshi-ku, Osaka City
Claims (1)
と、この膨張部材の膨張により移動せしめられる永久磁
石と、前記膨張部材の膨張時に前記永久磁石により閉成
せしめられるリードスイッチとを、開口部を有するケー
ス内に収納して成る漏洩検知素子。1. An expansion member whose volume expands by absorbing liquid, a permanent magnet that is moved by the expansion of the expansion member, and a reed switch that is closed by the permanent magnet when the expansion member expands, are connected to each other through an opening. A leak detection element housed in a case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10442682A JPS58221142A (en) | 1982-06-16 | 1982-06-16 | Leakage detecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10442682A JPS58221142A (en) | 1982-06-16 | 1982-06-16 | Leakage detecting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58221142A true JPS58221142A (en) | 1983-12-22 |
Family
ID=14380358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10442682A Pending JPS58221142A (en) | 1982-06-16 | 1982-06-16 | Leakage detecting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58221142A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0200897A2 (en) * | 1985-05-09 | 1986-11-12 | Meier-Schenk AG | Fluid leakage indicator |
| EP0849580A3 (en) * | 1996-12-18 | 1999-03-03 | Sergio Faustini | System for sensing and blocking leakages of liquid fed by a network |
| EP1602909A1 (en) * | 2004-06-04 | 2005-12-07 | Grundfos a/s | Display element for indicating a foreign material in a fluid |
| WO2012150013A1 (en) * | 2011-05-05 | 2012-11-08 | Hydac Technology Gmbh | Sensor device for detecting flowable media, a pressure device and a measuring method |
-
1982
- 1982-06-16 JP JP10442682A patent/JPS58221142A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0200897A2 (en) * | 1985-05-09 | 1986-11-12 | Meier-Schenk AG | Fluid leakage indicator |
| EP0200897A3 (en) * | 1985-05-09 | 1987-09-02 | Meier-Schenk AG | Fluid leakage indicator |
| EP0849580A3 (en) * | 1996-12-18 | 1999-03-03 | Sergio Faustini | System for sensing and blocking leakages of liquid fed by a network |
| EP1602909A1 (en) * | 2004-06-04 | 2005-12-07 | Grundfos a/s | Display element for indicating a foreign material in a fluid |
| WO2012150013A1 (en) * | 2011-05-05 | 2012-11-08 | Hydac Technology Gmbh | Sensor device for detecting flowable media, a pressure device and a measuring method |
| US9488617B2 (en) | 2011-05-05 | 2016-11-08 | Hydac Technology Gmbh | Sensor device for detecting flowable media, a pressure device and a measuring method |
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