JPH074996U - Insulated pipe with leak detection line - Google Patents
Insulated pipe with leak detection lineInfo
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- JPH074996U JPH074996U JP3497193U JP3497193U JPH074996U JP H074996 U JPH074996 U JP H074996U JP 3497193 U JP3497193 U JP 3497193U JP 3497193 U JP3497193 U JP 3497193U JP H074996 U JPH074996 U JP H074996U
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- Prior art keywords
- pipe
- heat insulating
- leak detection
- detection line
- wire
- Prior art date
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Abstract
(57)【要約】
【目的】 温・冷水供給管路布設と漏液検知回路形成を
同時に行って、その労力・時間・経費の軽減を図り、併
せて、監視センターに居ながらにして漏液位置をリアル
タイムで的確に探知出来るようにする。
【構成】 管体１外周に漏液検知線１０を介在して断熱
層２を形成した断熱管Ｐであって、漏液検知線１０は、
２本の低抵抗電極線と１本の高抵抗電極線とから成り、
低抵抗電極線の一本は非通液に絶縁被覆され、他の一本
と高抵抗電極線とは通液可能に絶縁されている。漏液検
知線１０の両端にコネクタ３が設けられている。この断
熱管Ｐは、端部を接続しながら所要長さ布設する。この
とき、各断熱管Ｐの漏液検知線１０はコネクタ３を介し
て接続する。管路の最終端から、その漏液検知線をリー
ド線を介して監視センターに導き、センターでは各電極
線の抵抗値測定によって、漏液及びその位置を検出す
る。
(57) [Abstract] [Purpose] We laid hot and cold water supply pipes and formed a leak detection circuit at the same time to reduce the labor, time and cost of the leak detection. Make it possible to accurately detect the position in real time. [Structure] A heat insulating pipe P having a heat insulating layer 2 formed on the outer periphery of a tubular body 1 with a liquid leak detecting line 10 interposed therebetween.
It consists of two low resistance electrode wires and one high resistance electrode wire,
One of the low resistance electrode wires is non-liquid-permeable and insulation coated, and the other one is insulated from the high resistance electrode wire so as to be liquid-permeable. Connectors 3 are provided at both ends of the leak detection line 10. This heat insulating pipe P is laid for a required length while connecting the ends. At this time, the liquid leakage detection line 10 of each heat insulation pipe P is connected via the connector 3. From the final end of the pipeline, the leak detection line is led to a monitoring center via a lead wire, and the center detects the leak and its position by measuring the resistance value of each electrode line.
Description
【０００１】[0001]
この考案は、監視センターにおいて、漏液位置をリアルタイムで居ながらにし て的確に検知可能にした断熱管であって、その配管作業を容易にしたものに関す る。 The present invention relates to a heat insulation pipe capable of accurately detecting a liquid leakage position in real time at a monitoring center while facilitating its piping work.
【０００２】[0002]
地域冷暖房あるいは高層建築物等の、給湯配管、プラント配管、集中冷暖房配 管等において、温水や冷水の移送には断熱管が使用され、その多くは、地下埋設 、床下あるいは天井裏に配管（布設）されている。その断熱管は一般に鋼管製の サービス管（内管という。）外周に硬質ウレタンフォーム等の断熱層を設け、必 要に応じて更にその外周に保護ジャケットを設けたものである。 In hot water supply pipes, plant pipes, central heating and cooling pipes for district heating and cooling or high-rise buildings, heat insulation pipes are used to transfer hot and cold water, and most of them are underground pipes, pipes under the floor or above the ceiling (laying). ) Has been. The heat-insulating pipe is generally a service pipe (referred to as an inner pipe) made of steel, and a heat-insulating layer such as hard urethane foam is provided on the outer periphery of the service pipe, and if necessary, a protective jacket is further provided on the outer periphery thereof.
【０００３】 この断熱管において、布設後の長期使用により、内管にピンホールが生ずるこ とがあり、このピンホールは、その位置を確認して、閉塞などの補修をしなけれ ばならない。In this heat insulating pipe, a pinhole may be formed in the inner pipe due to long-term use after installation, and the pinhole must be repaired by confirming its position and closing it.
【０００４】 この従来の一般的な補修作業は、埋設した断熱管を一定の間隔に区切って内圧 を加え、その圧力低下の状態を観察し、圧力低下した区間をピンホールが生じた 位置とし、その区間を掘り起こしてピンホールを補修している。In this conventional general repair work, the buried heat insulating pipe is divided into fixed intervals, an internal pressure is applied, the state of the pressure drop is observed, and the section where the pressure drop is made the position where the pinhole is generated, The section is dug up to repair the pinhole.
【０００５】 しかしながら、この補修作業では、分割区間毎に加圧試験を実施する必要があ り、またピンホールの存在を確認したとしても、分割区間内にあることが分かる だけでピンホールの発生位置そのものが分かる訳ではない。このため、ピンホー ル発生区間全域を掘削せねばならず、それには、多くの労力・時間および経費を 必要とする問題がある。However, in this repair work, it is necessary to carry out a pressurization test for each divided section, and even if the existence of a pinhole is confirmed, the occurrence of a pinhole is only known to be within the divided section. The position itself is not understood. For this reason, it is necessary to excavate the entire pinhole generation section, which requires a lot of labor, time and cost.
【０００６】 この問題を解決する従来技術として、特公昭５８−１７４２２号公報において 、「複層管の漏洩箇所検知方法」が提案されている。この提案技術は、漏洩箇所 を的確につきとめてから掘削作業を開始することが可能であり、掘削作業を大幅 に軽減することができる。As a conventional technique for solving this problem, Japanese Patent Publication No. Sho 58-17422 proposes a “method for detecting a leaked portion of a multi-layer pipe”. The proposed technology can start the excavation work after accurately identifying the leakage point, and can significantly reduce the excavation work.
【０００７】 しかしながら、内管内に検知体を挿入する作業および内管と外管との間に検知 体の変色体を変色させるためのガスを送給する作業が必要であり、その作業が煩 雑である。また、この技術では、内管と外管との間にエアースペースを有する複 層管でないと実施できない技術であるなどの問題を残している。However, it is necessary to insert the detection body into the inner tube and to supply a gas for changing the color of the discolored body of the detection body between the inner tube and the outer tube, which is complicated. Is. Further, this technique has a problem that it cannot be implemented unless it is a multi-layer pipe having an air space between the inner pipe and the outer pipe.
【０００８】 一方、特開昭５３−７２２５８号公報、特開昭６１−７５６００号公報等にお いては、断熱管に漏液検知線を添設した技術が開示されている。しかしながら、 これらの技術は、漏液を検出するだけで、その漏液位置を検知するものではない 。On the other hand, JP-A-53-72258, JP-A-61-75600 and the like disclose a technique in which a leak detecting line is attached to a heat insulating tube. However, these techniques only detect the leak and do not detect the leak position.
【０００９】 また、漏液位置を検知し得る漏液検知線としては、実公平４−２２２８２号公 報等にマーレーループ法によるものが示され、また、後述の抵抗線を使用したも の（実施例参照）等がある。As a liquid leakage detection line capable of detecting a liquid leakage position, a wire according to the Murray loop method is shown in Japanese Utility Model Publication No. 4-222282, and a resistance wire described later is used. Refer to the example).
【００１０】 これらの漏液位置を検知可能な検知線において、検知精度が高く、かつ操作が 容易なものは後者の抵抗線を使用したものであり、この技術は３本の電極線を必 要とする。Among these detection lines capable of detecting the liquid leakage position, the one having high detection accuracy and easy operation uses the latter resistance wire, and this technique requires three electrode wires. And
【００１１】 ところで、断熱管は一定長さのものであるため、布設に際しては、必ず接続作 業が伴い、その際、漏液検知線を添設すれば、その漏液検知線の接続も必要であ る。このとき、漏液検知線が３本の電極線からなれば、その接続は対応する電極 線を間違えることなく確実にせねばならず、間違えれば、検知ができないことと なる。その接続部のやり直しは煩わしく、とくに、その接続部の断熱を、樹脂組 成物の注入固化により構成する場合は（実施例参照）、非常に煩わしいものとな る。By the way, since the heat insulating pipe has a certain length, a connection work is always required when laying the pipe, and at that time, if a leak detection line is additionally provided, it is necessary to connect the leak detection line. Is. At this time, if the liquid leakage detection line is composed of three electrode lines, the connection must be ensured without making a mistake in the corresponding electrode line, and if it is incorrect, detection will not be possible. Redoing of the connection part is troublesome, especially when the heat insulation of the connection part is constituted by injection and solidification of the resin composition (see Examples).
【００１２】[0012]
この考案は、以上の実情の下、抵抗線を含む電極線３本の漏液検知線でもって 、漏液位置を検出し得るようにするとともに、その検知線を断熱管に添設し、そ の断熱管接続時の漏液検知線の接続を容易にすることを課題とする。 Under the above circumstances, the present invention makes it possible to detect the position of liquid leakage with a liquid leakage detection line consisting of three electrode wires including resistance wires, and attach the detection line to a heat insulating pipe. An object of the present invention is to facilitate the connection of the leak detection line when connecting the heat insulating pipe.
【００１３】[0013]
上記課題を解決するために、この考案にあっては、管体の外周に断熱層を形成 し、その全長に亘って漏液検知線を設けた従来周知の断熱管において、 上記漏液検知線は、２本の低抵抗電極線と１本の高抵抗電極線とから成り、前 記低抵抗電極線の一本は非通液に絶縁被覆され、他の一本と前記高抵抗電極線と は相互に通液可能に絶縁されており、 かつ、上記漏液検知線の両端は上記管体の両端から導出され、その端にコネク タが設けられている構成としたのである。 In order to solve the above-mentioned problems, in the present invention, in the conventional well-known heat insulating pipe in which a heat insulating layer is formed on the outer periphery of the pipe body and a leak detecting line is provided over the entire length thereof, Is composed of two low resistance electrode wires and one high resistance electrode wire, one of the low resistance electrode wires is non-liquid-insulating, and the other is connected to the high resistance electrode wire. Are so insulated that they can pass through each other, and both ends of the leak detection line are led out from both ends of the pipe body, and connectors are provided at the ends.
【００１４】 漏液検知線の管体への添設は、管体と断熱層との界面、断熱層内、断熱層外面 等の適宜な所に行えばよい。The liquid leakage detection line may be attached to the pipe body at an appropriate place such as the interface between the pipe body and the heat insulation layer, the inside of the heat insulation layer, or the outer surface of the heat insulation layer.
【００１５】[0015]
このように構成するこの考案に係る断熱管は、その端部を接続しながら所要長 さ布設する。このとき、各断熱管の漏液検知線はコネクタを介して接続する。こ のコネクタ接続は、通常、嵌め合い位置が決定されているため、対応の接続電極 線を誤ることはない。 The heat insulating pipe according to the present invention thus constructed is laid for a required length while connecting its ends. At this time, the leak detection line of each heat insulation pipe is connected through a connector. Since the fitting position of this connector connection is usually determined, the corresponding connection electrode wire will not be mistaken.
【００１６】 布設した管路の最終端から、その漏液検知線をリード線を介して監視センター に導き、センターでは電極線の抵抗値測定によって、漏液及びその位置を検出す る（実施例参照）。From the final end of the installed pipe, the liquid leakage detection line is led to the monitoring center via the lead wire, and the liquid leakage and its position are detected by measuring the resistance value of the electrode wire at the center (Example reference).
【００１７】[0017]
【実施例】 図１に示すように、鋼製内管１の外周に硬質ウレタンフォーム等の断熱層２を 被覆成形等により設けて断熱管Ｐとする。その断熱層２の成形時、内管１の全長 に亘る漏液検知線１０を埋込み、この漏液検知線１０の両端は所要長さ突出させ てコネクタ３を設ける。このコネクタ３は気密性（水密性）とする。EXAMPLES As shown in FIG. 1, a heat insulating layer 2 such as hard urethane foam is provided on the outer periphery of a steel inner tube 1 by coating or the like to form a heat insulating tube P. At the time of molding the heat insulation layer 2, the liquid leakage detection line 10 is embedded over the entire length of the inner pipe 1, and both ends of the liquid leakage detection line 10 are provided with a connector 3 by projecting a required length. The connector 3 is airtight (watertight).
【００１８】 漏液検知線１０は、錫メッキ軟銅集合撚線０．７５sqmm（３０／０．１８mm） １１ａの上に、ポリエチレン糸２００デニール（０．１７mmφ）３本持ち１６本 打ち（編組ピッチ１０mm）編組密度７７％で編組絶縁１１ｂを設けた第１電極線 １０ａと、錫メッキ軟銅集合撚線０．５sqmm（２０／０．１８mm) １２ａ上に、 ０．１５mm厚さの塩化ビニル（ＰＶＣ）絶縁被覆１２ｂを設けた第２電極線１０ ｂと、０．４mmφのニクロム線の第３電極線１０ｃとから成る。その各電極線１ ０ａ、１０ｂ、１０ｃは図３に示すように互いに並行に配置され、この上に、ナ イロン単糸０．３３mmφ１２本打ち（編組ピッチ３０mm）編組密度１９％の保護 編組１３を設けてある。The liquid leakage detection wire 10 is made of tin-plated annealed copper aggregate stranded wire 0.75 sqmm (30 / 0.18 mm) 11a, polyethylene yarn 200 denier (0.17 mmφ) 3 pieces, 16 pieces (braid pitch 10 mm). ) 0.15 mm thick vinyl chloride (PVC) on the first electrode wire 10a provided with the braid insulation 11b at a braid density of 77% and the tin-plated annealed copper aggregate stranded wire 0.5sqmm (20 / 0.18mm) 12a The second electrode wire 10b is provided with an insulating coating 12b, and the third electrode wire 10c is a 0.4 mmφ nichrome wire. The respective electrode wires 10a, 10b, 10c are arranged in parallel with each other as shown in FIG. 3, on which a nylon single yarn 0.33 mmφ12 striking (braid pitch 30 mm) protective braid 13 with a braid density of 19% is placed. It is provided.
【００１９】 第１電極線１０ａの絶縁編組１１ｂのピッチは７７％としているが、６０〜８ ５％の範囲であれば所望の検出感度を得ることができる。また、保護編組１３の 編組密度は１９％にしているが、１５〜５０％の範囲で選択実施することができ る。それらの編組密度を大きくすると、水分の通過が遅くなり検出感度が低下し 、一方、小さくなりすぎると誤動作の原因となる。Although the pitch of the insulating braid 11b of the first electrode wire 10a is 77%, a desired detection sensitivity can be obtained in the range of 60 to 85%. Further, although the braid density of the protective braid 13 is set to 19%, it can be selectively implemented within the range of 15 to 50%. Increasing the braid densities slows the passage of moisture and lowers the detection sensitivity, while too small a density causes malfunctions.
【００２０】 また、漏液検知線１０は、図４に示すように、各電極線１０ａ、１０ｂ、１０ ｃを撚り合わせた上に保護編組１３を施してもよく、要するに、第１電極線１０ ａと第３電極線１０ｃとが通液可能に空気絶縁されており、第２電極線１０ｂは 電極線１０ａ、１０ｃとの間で通液しない電気絶縁状態になっていれば、本考案 の目的は達成することができる。従って、上記目的を達成することの出来るもの であれば、その構造は特に限定されるものではない。As shown in FIG. 4, the liquid leakage detection wire 10 may be formed by twisting the electrode wires 10 a, 10 b, 10 c on top of each other and then applying the protective braid 13, in short, the first electrode wire 10 a and the third electrode wire 10c are air-insulated so that liquid can pass therethrough, and the second electrode wire 10b is in an electrically insulated state in which liquid does not pass between the electrode wires 10a and 10c, the object of the present invention Can be achieved. Therefore, the structure is not particularly limited as long as the above-mentioned object can be achieved.
【００２１】 ここで、編組密度は次式（１）で表される。Here, the braid density is represented by the following equation (1).
【００２２】[0022]
【数１】 [Equation 1]
【００２３】 つぎに、本考案の漏液検知線１０付き断熱管Ｐを用いたビルディング内の温・ 冷水供給管の布設について図５乃至図８に基づき説明する。Next, the laying of the hot / cold water supply pipe in the building using the heat insulating pipe P with the leak detection line 10 of the present invention will be described with reference to FIGS. 5 to 8.
【００２４】 図５、図６に示すように、布設溝あるいはブラケットに断熱管Ｐを投入し、内 管１の接続は公知の手段で行い、次いで漏液検知線１０はコネクタ３によって接 続する。このとき、図５のものでは、コネクタ３、３は雄、雌である必要があっ て、断熱管Ｐを埋設溝に投入するとき、対向するコネクタ３、３が雄、雌になる よう注意をする必要がある。しかし、図６に示すように、補助漏液検知線１０’ を用意し、コネクタ３は雄又は雌に統一し、補助漏液検知線１０’のコネクタ３ ’を雌又は雄とすれば、そのような心遣いは必要がなく、補助漏液検知線１０’ をコネクタ３、３間に挿入すれば容易に工事を進行することができる。As shown in FIGS. 5 and 6, the heat insulating pipe P is put into the laying groove or the bracket, the inner pipe 1 is connected by a known means, and then the leak detection line 10 is connected by the connector 3. . At this time, in the case of the one shown in FIG. 5, the connectors 3 and 3 need to be male and female, and when inserting the heat insulating pipe P into the burying groove, be careful that the opposing connectors 3 and 3 are male and female. There is a need to. However, as shown in FIG. 6, if the auxiliary liquid leakage detection line 10 'is prepared, the connector 3 is unified into male or female, and if the connector 3'of the auxiliary liquid leakage detection line 10' is female or male, Such care is not necessary, and the construction can be easily proceeded by inserting the auxiliary liquid leakage detection line 10 'between the connectors 3 and 3.
【００２５】 コネクタ接続が終了すると、その部分に断熱層２のない部分（コネクタ接続部 Ｓ）が形成されるので、図７に示すように、この部分に別途用意された軸方向に 二つ割りした継手用保温材２’、２’を被せる。この際、前記コネクタ３、３’ が納まるように、一方の保温材２’内面には凹窪部２ａ’が形成してある（同図 ｂ）。二つ割り保温材２’をコネクタ接続部Ｓに被せたら、その上に粘着ビニル テープ４ａを巻回してこれを固定する（同図ｃ）。保温材２’、２’の接合縁及 び両端縁はテーピング４ｂ又は熱収縮カバー（後述の熱収縮パイプ４と同様なも の）によって防水する。When the connector connection is completed, a portion (connector connecting portion S) without the heat insulating layer 2 is formed at that portion, so as shown in FIG. 7, a joint which is separately prepared in this portion and which is divided into two in the axial direction. Cover heat insulating material 2 ', 2'. At this time, a concave portion 2a 'is formed on the inner surface of the one heat insulating material 2'so that the connectors 3, 3'can be accommodated therein (FIG. 2B). After covering the connector connecting portion S with the two-divided heat retaining material 2 ', an adhesive vinyl tape 4a is wound thereon to fix the same (c in the same figure). The heat insulating materials 2'and 2'are joined together at their joint edges and both edges by a taping 4b or a heat shrink cover (similar to the heat shrink pipe 4 described later).
【００２６】 前記コネクター接続部Ｓ上の他の断熱層形成手段としては、図８に示す如く、 まず、一方の断熱管Ｐに予め熱収縮パイプ４を引き通しておき（同図ａ）、接続 終了後、その熱収縮パイプ４を接続部Ｓ上に戻し両端を加熱収縮させ、両側の断 熱層２、２にわたって注入型を形成する。この注入型の注入孔ｈから反応発泡硬 化型のウレタン樹脂組成物ａを注入して断熱層２を形成する（同図ｂ）。As another heat insulating layer forming means on the connector connecting portion S, as shown in FIG. 8, first, the heat shrinkable pipe 4 is previously drawn through one heat insulating pipe P (a in the same figure), and the connection is made. After the completion, the heat-shrinkable pipe 4 is returned to the connecting portion S to heat-shrink both ends, and an injection mold is formed over the heat-insulating layers 2 and 2 on both sides. The reaction foam hardening type urethane resin composition a is injected from the injection type injection hole h to form the heat insulating layer 2 (FIG. 8B).
【００２７】 この場合、該樹脂組成物ａの発泡過程でコネクタ３、３’およびその接続部に 可なり大きい圧力・張力が働き、電極線１０ａ、１０ｂ、１０ｃとコネクタ３、 ３’との接続部が外れる恐れがあるので、コネクタ３、３’はその内に発泡樹脂 組成物ａが侵入しない構造のものを採用する必要がある。固化後、同図ｃのよう に蓋５をしたのち、パイプ４の端を熱収縮カバー又はテーピング４ｂによって防 水する（同図ｄ）。In this case, in the foaming process of the resin composition a, considerably large pressure and tension act on the connectors 3, 3 ′ and the connecting portions thereof, so that the electrode wires 10 a, 10 b, 10 c are connected to the connectors 3, 3 ′. Since the parts may come off, it is necessary to adopt connectors 3 and 3'having a structure in which the foamed resin composition a does not enter. After the solidification, the lid 5 is closed as shown in FIG. 3C, and the end of the pipe 4 is protected by a heat shrinkable cover or taping 4b (FIG. 3D).
【００２８】 上記布設工事はビルディング内のものであったから、断熱層２の外側には遮水 を兼る保護ジャケットのない漏液検知線付き断熱管Ｐを用いたが、ビルディング の中でも断熱管Ｐが浸水する可能性のあるところでは、従来と同様に、外部保護 ジャケットを有するものを用いる必要がある。勿論、地域給湯のための地中配管 では同様の外部保護ジャケットのあるものを用いることは言うまでもない。Since the above-mentioned laying work was done inside the building, an insulating pipe P with a leak detection line without a protective jacket that also functions as a water shield was used outside the insulating layer 2. Where there is a possibility of inundation, it is necessary to use the one with an external protective jacket, as in the past. Of course, it goes without saying that underground pipes for hot water supply in the area should have the same external protective jacket.
【００２９】 上記実施例では、内管１と断熱層２との界面に漏液検知線１０を添設したが、 断熱層２の中、断熱層２の外周表面に添設してもよい。また、断熱層２の外周に 外部保護ジャケットを設ける場合、内管１と断熱層２との間あるいは断熱層２と 外部保護ジャケットとの間にエアースペースを設けることもできる。Although the liquid leakage detection line 10 is provided at the interface between the inner tube 1 and the heat insulating layer 2 in the above embodiment, it may be provided inside the heat insulating layer 2 on the outer peripheral surface of the heat insulating layer 2. When an outer protective jacket is provided on the outer circumference of the heat insulating layer 2, an air space may be provided between the inner tube 1 and the heat insulating layer 2 or between the heat insulating layer 2 and the outer protective jacket.
【００３０】 以上のようにして漏液検知線１０付き断熱管Ｐを順次布設し、最終端の断熱管 Ｐの漏液検知線１０からは通常の電気絶縁されたリード線を用いて延線し監視セ ンターに導入する。監視センターでは、図９に示す検出回路を構成して、内管１ のピンホールの有無及び位置を検出する。As described above, the heat-insulating pipes P with the liquid leakage detection line 10 are sequentially laid, and extended from the liquid leakage detection line 10 of the heat-insulating pipe P at the final end by using an ordinary electrically insulated lead wire. Install it in the monitoring center. The monitoring center configures the detection circuit shown in FIG. 9 to detect the presence or absence and the position of the pinhole in the inner pipe 1.
【００３１】 例えば、図９に示すように、電極線１０ａ、１０ｃのｂ、ｃ点（ｂ、ｃは同じ 位置の点）でピンホールが発生し、漏液が生じれば、電極線１０ａ、１０ｃのｂ ｃ間が短絡し、ａ、ｂ、ｃ、ｄの径路で電流ｉが流れて電流計Ａ及び電圧計Ｖの 測定値が大きく変化して、その漏液を検出し得る。For example, as shown in FIG. 9, if pinholes are generated at points b and c of the electrode wires 10a and 10c (b and c are points at the same position) and liquid leakage occurs, the electrode wires 10a and 10a A short circuit occurs between b and c of 10c, and a current i flows through the paths of a, b, c, and d, and the measured values of the ammeter A and the voltmeter V change significantly, so that the liquid leakage can be detected.
【００３２】 また、このとき、電流計Ａの値をＩ、電圧計Ｖの値をＥとすると、ｃｄ間の抵 抗値Ｒｓ1 は次式（２）で求まる。なお、ｂｃ間の抵抗値Ｒｗ、電極線１０ａ、 １０ｂの抵抗は、電極線１０ｃに比べはるかに小さいため無視する。 Ｒｓ1 ＝Ｅ／Ｉ …… （２） 一方、電極線１０ｃの単位長さ当りの抵抗値をＲｓとすると、漏液位置Ｌ（ｄ 、ｃ間）は次式（３）で求まる。 Ｌ＝Ｒｓ1 ／Ｒｓ …… （３）At this time, assuming that the value of the ammeter A is I and the value of the voltmeter V is E, the resistance value Rs 1 between cd is obtained by the following equation (2). The resistance value Rw between bc and the resistances of the electrode wires 10a and 10b are much smaller than that of the electrode wire 10c and are ignored. Rs 1 = E / I (2) On the other hand, assuming that the resistance value per unit length of the electrode wire 10 c is Rs, the liquid leakage position L (between d 1 and c 2) is obtained by the following equation (3). L = Rs 1 / Rs (3)
【００３３】[0033]
以上説明した如く、本考案によれば、断熱管の布設に際し、順次漏液検知線を コネクタによって接続し、該接続部の断熱処理を繰り返すことにより、温・冷水 の供給管路等の布設と同時に漏液検知回路が形成され、この回路を監視センター に導入することにより、監視センターに居ながらにしてリアルタイムに漏液位置 を的確に探知することが出来るとともに、管路および漏液検知回路の形成に要す る労力・時間・経費が大幅に軽減される。 As described above, according to the present invention, when laying a heat insulating pipe, the leak detection lines are sequentially connected by a connector, and the heat insulating process of the connecting portion is repeated to lay a hot and cold water supply pipe and the like. At the same time, a liquid leakage detection circuit is formed, and by introducing this circuit into the monitoring center, it is possible to accurately detect the liquid leakage position in real time while staying at the monitoring center, and at the same time, to detect the pipeline and liquid leakage detection circuit. The labor, time and cost required for formation are greatly reduced.
【図１】一実施例の中間部除去切断正面図FIG. 1 is a front view of an intermediate portion removing cutting according to an embodiment.
【図２】同実施例の切断側面図FIG. 2 is a cut side view of the same embodiment.
【図３】図２の要部拡大図FIG. 3 is an enlarged view of a main part of FIG.
【図４】漏液検知線の一部除去部分図FIG. 4 Partial view of partial removal of the leak detection line
【図５】同実施例の布設説明図FIG. 5 is an explanatory view of the installation of the same embodiment.
【図６】同実施例の布設説明図FIG. 6 is an explanatory view of the installation of the same embodiment.
【図７】同実施例の布設説明図FIG. 7 is an explanatory view of the installation of the same embodiment.
【図８】同実施例の布設説明図FIG. 8 is an explanatory view of the installation of the same embodiment.
【図９】漏液位置検出回路図FIG. 9: Leakage position detection circuit diagram
１ 管体（内管） ２ 断熱層 ２’ 継手用保温材 ３、３’ コネクタ ４ａ 粘着ビニルテープ ４ 熱収縮パイプ ５ 蓋 １０ 漏液検知線 １０ａ、１０ｂ 低抵抗電極線（第１、第２電極線） １０ｃ 高抵抗電極線（第３電極線） ａ 樹脂組成物 Ｐ 断熱管 Ａ 電流計 Ｖ 電圧計 DESCRIPTION OF SYMBOLS 1 Tubular body (inner tube) 2 Insulating layer 2'Heat insulating material for joint 3, 3'Connector 4a Adhesive vinyl tape 4 Heat shrink pipe 5 Lid 10 Leak detection line 10a, 10b Low resistance electrode line (first and second electrodes) Wire) 10c High resistance electrode wire (third electrode wire) a Resin composition P Adiabatic tube A Ammeter V Voltmeter
───────────────────────────────────────────────────── フロントページの続き (72)考案者 三島 啓邦 東京都中央区日本橋室町３丁目１番３号 株式会社クボタ東京本社内 (72)考案者 小菅 唯光 東京都中央区日本橋室町３丁目１番３号 株式会社クボタ東京本社内 (72)考案者 大西 邦彦 東京都港区浜松町１丁目12番４号 日本リ ックウィル株式会社内 (72)考案者 小島 健司 東京都墨田区両国２丁目10番５号 三井金 属エンジニアリング株式会社内 (72)考案者 小堀 保 東大阪市岩田町２丁目３番１号 タツタ電 線株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Keiho Mishima 3 1-3 Nihombashi Muromachi, Chuo-ku, Tokyo Kubota Tokyo Head Office (72) Creator Yumitsu Kosuge 3-chome Nihonbashi Muromachi, Chuo-ku, Tokyo No. 3 Kubota Tokyo Head Office (72) Inventor Kunihiko Onishi 1-12-4 Hamamatsucho, Minato-ku, Tokyo Inside Japan Rickwill Co., Ltd. (72) Kenji Kojima 2-10-10 Ryogoku, Sumida-ku, Tokyo No. 5 Mitsui Kinzoku Engineering Co., Ltd. (72) Inventor Yasushi Kobori 2-3-1, Iwata-cho, Higashi Osaka City Tatsuta Electric Wire Co., Ltd.
Claims (1)
全長に亘って漏液検知線１０を設けた断熱管Ｐであっ
て、 上記漏液検知線１０は、２本の低抵抗電極線１０ａ、１
０ｂと１本の高抵抗電極線１０ｃとから成り、前記低抵
抗電極線の一本１０ｂは非通液に絶縁被覆され、他の一
本１０ａと前記高抵抗電極線１０ｃとは相互に通液可能
に絶縁されており、 かつ、上記漏液検知線１０の両端は上記管体１の両端か
ら導出され、その端にコネクタ３が設けられていること
を特徴とする漏液検知線付き断熱管。1. A heat insulating pipe P, wherein a heat insulating layer 2 is formed on the outer periphery of a pipe body 1, and a liquid leakage detecting line 10 is provided over the entire length thereof. Resistance electrode wires 10a, 1
0b and one high resistance electrode wire 10c, one of the low resistance electrode wires 10b is non-liquid-insulating, and the other one 10a and the high resistance electrode wire 10c pass through each other. A heat-insulated pipe with a leak detection wire, which is insulated as much as possible, and has both ends of the leak detection wire 10 led out from both ends of the pipe body 1 and a connector 3 provided at the end. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993034971U JP2593198Y2 (en) | 1993-06-28 | 1993-06-28 | Insulated tube with leak detection line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993034971U JP2593198Y2 (en) | 1993-06-28 | 1993-06-28 | Insulated tube with leak detection line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH074996U true JPH074996U (en) | 1995-01-24 |
| JP2593198Y2 JP2593198Y2 (en) | 1999-04-05 |
Family
ID=12429032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993034971U Expired - Fee Related JP2593198Y2 (en) | 1993-06-28 | 1993-06-28 | Insulated tube with leak detection line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593198Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295788A (en) * | 2001-03-29 | 2002-10-09 | Sekisui Chem Co Ltd | Method for heat insulating protective covering of heat insulation plastic pipe |
| CN113778208A (en) * | 2021-09-15 | 2021-12-10 | 深圳市英维克科技股份有限公司 | Pipeline |
-
1993
- 1993-06-28 JP JP1993034971U patent/JP2593198Y2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295788A (en) * | 2001-03-29 | 2002-10-09 | Sekisui Chem Co Ltd | Method for heat insulating protective covering of heat insulation plastic pipe |
| JP4498632B2 (en) * | 2001-03-29 | 2010-07-07 | 積水化学工業株式会社 | Insulating protective coating method for insulating plastic pipes |
| CN113778208A (en) * | 2021-09-15 | 2021-12-10 | 深圳市英维克科技股份有限公司 | Pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2593198Y2 (en) | 1999-04-05 |
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