JP3865672B2

JP3865672B2 - Liquid leak detection device

Info

Publication number: JP3865672B2
Application number: JP2002259349A
Authority: JP
Inventors: 功宇野
Original assignee: 株式会社ハジメ
Priority date: 2002-09-04
Filing date: 2002-09-04
Publication date: 2007-01-10
Anticipated expiration: 2022-09-04
Also published as: JP2004101205A

Description

【０００１】
【発明の属する技術分野】
本発明は、管路に満たされた液体の漏れを検出するための装置に関するものである。
【０００２】
【従来の技術】
例えば上水道の微量の水漏れは、水道使用量の検針でも発見される例が少い。人目に触れにくく、発見すること自体が困難なためであるが、水漏れが微量のものである場合にはメーター性能も原因になっている。即ち、従来の水道メータでは毎分約８０〜９０ｃｃ以下では漏れがあっても検針にかからないとされているのである。
【０００３】
それ故、微量漏水の発見のための装置が提案されており、本件出願人も、さきに開発したものについて出願をしている。先行出願に係る発明は、管路を流れる液体の液圧に対抗する付勢力によって開弁可能な開閉弁を具備し、水道を使用しながらでも漏水を発見可能とするのが目的である。これは安定しない上水道の圧力の下手の漏れの発見という困難を伴うことになり、必然的に精度に限界を生じるためで、毎分約５０ｃｃ以下では漏れの発見が困難であった。
【０００４】
【発明が解決しようとする課題】
本発明は前記の点に着目してなされたもので、その課題は、極めて高精度の液漏れ検出、例えば毎分数ｃｃ以下の極微量の水漏れの検出を可能にすることである。
【０００５】
【課題を解決するための手段】
前記の課題を解決するため本発明は、加圧側に通じる１次室と、本端側に通じる２次室、及び１次室と２次室に通じる側室とを装置本体に設け、１次室と２次室とを通ずる通口を開閉しかつ閉じ状態を保持可能な操作子を設け、さらに装置本体には可変容積室を設けるとともに、可変容積室を仕切る可変部の一方を１次室にまた可変部の他方を２次側に通じさせ、可変部の変化に伴って液漏れを知らせる報知手段を設け、１次室に通じる加圧側には加圧タンクを接続し、加圧タンクには、１次側における加圧圧力で圧縮された空気とこの圧縮空気の圧力を受けている液体とを封入し、２次側において液漏れを生じているときに１次側の圧力を一定に保ち、可変部を通して２次側に圧力を加え続けるように構成するという手段を講じたものである。
【０００６】
【発明の実施の形態】
本発明に係る液漏れ検出装置は、管路に満たされた液体の漏れを検出するものである。従って、装置本体は管路に具備されるものではあるが、管路に流れがない状態で液体の漏れを検出し、それによって例えば安定しない上水道の圧力変動から免れることができ、高い精度の液漏れ検出が実現する。
【０００７】
装置本体には、加圧側に通じる１次室と、末端側に通じる２次室とが設けられる。加圧側とは、本発明の想定する液体供給系において、液体の供給源の側であり、上水道の場合には水道本管の側となる。末端側とは、本発明の液体供給系において、液体が配給消費される側であり、上水道の場合には水栓或いは蛇口と呼ばれる方の側である。さらに言えば、供給側は、相対的圧力系の中の高圧側、液の流れの中では上流側となり、末端側は相対的圧力系の中の低圧側、液の流れの中では下流側となるといっても良い。
【０００８】
１次室に通じる加圧側には加圧タンクを接続することができる。加圧タンクは耐圧容器であり、１次側における加圧圧力で圧縮された空気とこの圧縮空気の圧力を受けている液体とが封入された状態にあるときに、１次側の圧力を一定に保つ。このため２次側において液漏れを生じると、一定の圧力を２次側に加え続けることが可能となる。一定の圧力は、後述する可変容積室の可変部を介して２次側に印加される。
【０００９】
装置本体には、前記の１次室と２次室とを通じる側室を設ける。１次室と側室とは通口によって通じており、２次室と側室も同様に通口によって通じている。これらの通口の内で、１次室と側室を通じる通口を開閉可能とし、かつまた液体が通口を通過する流量を調節可能なように操作子を設ける。操作子は通口を開閉し、かつまた通過流量の調節のために、ねじ構造による位置決め手段を有していることが望ましい。位置決め手段によって通口を閉じた状態を保持することが可能となり、液体の圧力変動の影響を遮断することができる。
【００１０】
さらに容器本体には可変容積室を設け、その可変容積室を仕切る可変部の一方を１次室に、また可変部の他方を２次室に通じさせる。またこの可変容積室の、液漏れを原因とする変形によって、液漏れの報知手段を制御する。つまり可変部は液漏れを検出するための手段であり、例えばダイヤフラムなどと通称されている可撓膜によって構成される。可撓膜以外では、ピストンシリンダ装置の構造を持ったもの可変容積室に該当する。つまり変形は、拡大と縮小を含む。
【００１１】
液漏れの報知手段としては、電球やダイオードなどの発光、又は音や振動などを使用することができる。この報知手段によって液漏れが第３者に報じられその結果、液漏れが発見され必要な修理がなされることになる。
【００１２】
【実施例】
以下図示の実施例を参照して本発明をより詳細に説明する。本発明に係る液漏れ検出装置１０は、液体が流れる装置本体１１を具備する。装置本体１１は、上流側の１次室１２と下流側の２次室１３とを有しており、また上流側と下流側とは隔壁１４により遮断されていて、１次室の上流側には、加圧タンク１５が配備されている。
【００１３】
加圧タンク１５は耐圧構造のものから成り、タンク内と接続部１６との間の適当な箇所には開閉弁１７を有し、管路内の液体を加圧タンク内へ導入及び遮断可能としている。加圧タンク１５は１次室１２の上流に位置しているだけでなく、実施例に示すように液漏れ装置１０の一部をも構成していて、本装置１０の接続口１８、１９の一方も加圧タンク１５よりも上流に設けられている。
【００１４】
装置本体１１には１次室１２と２次室１３とに通じる側室２０を設ける。１次室１２と側室２０とは１次側通口２１によって通じ、２次室１３と側室２０とは２次側通口２２によって通じている。実施例の場合、１次側通口２１に開閉及び流量調節のための操作子２３が装備されており、この操作子２３はねじ構造の位置決め手段２４を有している。
【００１５】
さらに装置本体１１には可変容積室２５を設けている。例示の可変容積室２５は、可変部２６によって画成された状態にあり、可変部２６の一方は小口２７によって１次室１２に通じており、また可変部２６の他方は隙間２８によって側室２０に通じ、２次室１３側の圧力が導入されるようになっている。
【００１６】
可変容積室２５の変形によって、液漏れを知らせる報知手段３０を作動させるための機構が可変部２６に関連して設けられている。この機構は可変容積室２５の壁に開けられた穴との隙間２８から可変容積内に入り込み、ばね２９によって付勢され、可変部２６に接する先端部を有するピストン上の可動子３１と、可動子３１に設けられた磁石３２と、可動子３１の可動範囲と重なり得る位置に配置された、リードスイッチとして示されている開閉部３３と、開閉部３３と報知手段３０とを結ぶ電気回路３４とから成る。
【００１７】
図１に示した液漏れ検出装置１０は、図２、図３に示すように、操作子２３により１次側と２次側とを遮断した状態で使用する。図２は液漏れのない状態を示しており、１次室１２の圧力と２次室１３の圧力とは均衡しているので、可変部２６の変化はなく、磁石３２は開閉部３３から離れている。この均衡状態のときの加圧タンク１５における内部圧力はＨ_０とする。２次側に液漏れが生ずると、可変部２６の２次側の圧力が可変部２６の１次側に作用する圧力を下回ることになるので可変部２６が加圧タンク１５の内部圧力
Ｈ_１によって押し上げられ、磁石３２は開閉部３３を閉じる位置に移動するので、報知手段３０が作動する（図３）。この間の加圧タンク１５の内部圧力Ｈ _１は、可変部２６が移動し１次室側が拡大する分だけ僅かに低下することになる（Ｈ _０＞Ｈ _１）。
【００１８】
本発明に係る液漏れ検出装置１０は、被検部との関係において様々な接続方法を取ることが可能であり、夫々独自の構成を取り得る。図４に示すのは、上水道の配管３５に本装置１０を介在させ、末端側３６の水漏れを検出する、いわば水道圧方式とでもいうべきもので、水道メーター３７を一旦取り外して本装置１０を取り付ける。最初、元栓３８を開き、末端側３６の水栓を開いて水が流れる全管路、１次室１２、２次室１３、側室２０等に水を満流としてエア抜きを行ってから、水栓を閉じる。その後、配管各部をなじませるために数分ないし十数分待機し、操作子２３を閉じるが、水漏れがなければ２次室側の水量も減少せず１次室１２、２次室１３の圧力の均衡は保たれたままであるから報知手段３０も作動しない。しかし報知手段３０が作動すればそれは水漏れの報知である。東京都内の或る水道において試験したところ、操作子２３を閉じて、１分以内に報知手段３０が作動したときは毎分０．６ｃｃ（７〜８秒に１滴漏れる程度）以上の水漏れがあり、これが３分以内の作動では毎分０．２ｃｃ（２０〜２５秒に１滴漏れる程度）以上の水漏れがあり、さらに６分以内の作動では毎分０．１ｃｃ（４０〜５０秒に１滴漏れる程度）以上の水漏れがあることを示すものとなる。
【００１９】
図５に示すものは、水道本管４０に本装置１０を接続した箇所にテストポンプ４１を接続し、弁４２、４３で切換えてテストポンプ４１による水漏れ検出する方式である。４４はドレンバルブを示す。この場合、水道本管４０の弁４２と末端側４５の水栓を開き、満流としてエア抜きを行い、水道本管側の弁を閉じ、テストポンプ４１の弁４３を開き、テストポンプ４１で例えば１．７５Ｍｐａの圧力を各配管に加え続け、その後ドレンバルブ４４を１分間で０．１Ｍｐａ下降する程度の割合でゆっくりと開き、圧力計４６を見ながら１．０Ｍｐａまで降圧させ、ドレンバルブ４４を閉じ、この調圧操作を必要回数行ない圧力計４６が１．０Ｍｐａを示すようになったらドレンバルブ４４を閉じる。調圧作業終了までにさらに５〜１０分間程度配管各部をなじませてからテストポンプ側のバルブ４３
を閉じ操作子２３を閉じ、水漏れ検査を開始する。操作子２３を閉じ１０分間を経過しても報知手段３０が作動しなければ漏水はないと考えて良く。ランプ点灯までの時間で漏水量を前記のように推し測れることは図４の例の場合と同じである。
【００２０】
図６に示すものは、前２例が上流側からの加圧であったのに反して、下流側の加圧によって検査を行う末端装置検査方式の例である。この例では、水道配管に設けられている万能水栓４７と呼ばれる水栓への吐水管を取り外し、専用アダプター４８を介して本装置１０を取り付け、操作子２３を開くとともに、万能水栓４７を開く。この後で水道メーター５０の元栓４９を閉じ、配管各部をなじませるため５〜１０分間程度待機する。さらに、操作子２３を閉じ、検査を開始するが、この場合にも、１０分間の内に報知手段が作動しなければ漏水の可能性はないと考えて良い。この例の場合、１次側の圧力源は加圧タンク１５に封入された水と圧縮空気であり、１次側圧力を一定に保ち、２次側に漏水があるとき可変部２６を介して２次側に圧力を加え続けることで報知手段３０を作動させることができるものである。加圧タンク内の空気が水道の加圧圧力で圧縮されていることが重要であり、水しか入っていなければ上記の作用は期待することができない。
【００２１】
【発明の効果】
本発明は以上の如く構成されかつ作用するものであるから、検出システムを閉鎖系とするとともに、圧力タンクによる１次側圧力の一定保持によって、例えば、操作子２３を閉じて、１分以内に報知手段３０が作動したときは毎分０．６ｃｃ（７〜８秒に１滴漏れる程度）以上の水漏れがあり、これが３分以内の作動では毎分０．２ｃｃ（２０〜２５秒に１滴漏れる程度）以上の水漏れがあり、さらに６分以内の作動では毎分０．１ｃｃ（４０〜５０秒に１滴漏れる程度）以上の水漏れがあることを示すという極めて高精度の液漏れの検出を行うことができ、顕著な効果を奏することが理解される。
【図面の簡単な説明】
【図１】本発明に係る液漏れ検出装置の実施例を示す断面図。
【図２】同上装置における液漏れなしの状態を示す断面図。
【図３】同じく液漏れありの状態を示す断面図。
【図４】本発明装置を使用する水道圧方式の説明図。
【図５】同じくテストポンプ方式の説明図。
【図６】同じく末端設置検査方式の説明図。
【符号の説明】
１０液漏れ検出装置
１１装置本体
１２１次室
１３２次室
１５加圧タンク
２０側室
２１、２２通口
２３操作子
２５可変容積室
２６可変部
２７小口
３０報知手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for detecting leakage of liquid filled in a pipeline.
[0002]
[Prior art]
For example, a small amount of water leakage in the water supply is rarely detected even by metering the amount of water used. This is because it is difficult for humans to touch and it is difficult to discover, but when the amount of water leakage is very small, meter performance is also a cause. That is, in the conventional water meter, it is said that the meter reading is not applied even if there is a leak at about 80 to 90 cc or less per minute.
[0003]
Therefore, a device for detecting a small amount of water leakage has been proposed, and the present applicant has also filed an application for the one developed earlier. The invention according to the prior application is provided with an on-off valve that can be opened by an urging force that opposes the liquid pressure of the liquid flowing through the pipe, and it is an object to make it possible to detect water leakage even while using water. This is accompanied by the difficulty of finding a leak in the lower water pressure, which is not stable, and inevitably causes a limit in accuracy. Therefore, it is difficult to find a leak at about 50 cc or less per minute.
[0004]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above points, and its problem is to enable detection of liquid leakage with extremely high accuracy, for example, detection of a very small amount of water leakage of several cc or less per minute.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a primary chamber provided with a primary chamber communicating with the pressurizing side, a secondary chamber communicating with the main end side, and a side chamber communicating with the primary chamber and the secondary chamber. An operating element that opens and closes the passage that communicates with the secondary chamber and can maintain a closed state is provided. Further, the apparatus main body is provided with a variable volume chamber, and one of the variable portions that partition the variable volume chamber is used as the primary chamber. In addition, there is provided an informing means for notifying the other side of the variable part to the secondary side, and notifying the liquid leakage with the change of the variable part, and a pressure tank is connected to the pressure side leading to the primary chamber, The air compressed by the pressurized pressure on the primary side and the liquid receiving the pressure of the compressed air are sealed, and the primary side pressure is kept constant when liquid leakage occurs on the secondary side. , der which took measures that you configured to continue applying pressure to the secondary side through the variable section .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The liquid leak detection apparatus according to the present invention detects a leak of liquid filled in a pipeline. Therefore, although the apparatus main body is provided in the pipe line, the liquid leakage can be detected in a state where there is no flow in the pipe line, thereby avoiding, for example, an unstable water supply pressure fluctuation, and a highly accurate liquid. Leak detection is realized.
[0007]
The apparatus main body is provided with a primary chamber that communicates with the pressure side and a secondary chamber that communicates with the terminal side. In the liquid supply system assumed by the present invention, the pressurization side is a liquid supply source side, and in the case of water supply, is a water main side. The distal, in the liquid supply system of the present invention, is the side which the liquid is delivered consumed, when the water supply path is the side of the person who called faucet or faucet. Furthermore, the supply side is the high pressure side in the relative pressure system, the upstream side in the liquid flow, the end side is the low pressure side in the relative pressure system, and the downstream side in the liquid flow. It may be said that it becomes.
[0008]
A pressure tank can be connected to the pressure side leading to the primary chamber. The pressure tank is a pressure vessel, and the pressure on the primary side is constant when the air compressed by the pressurized pressure on the primary side and the liquid receiving the pressure of the compressed air are sealed. Keep on. For this reason, if liquid leakage occurs on the secondary side, it is possible to continue to apply a constant pressure to the secondary side. The constant pressure is applied to the secondary side via a variable portion of a variable volume chamber described later.
[0009]
The apparatus body is provided with a side chamber through the primary chamber and the secondary chamber. The primary chamber and the side chamber communicate with each other through the opening, and the secondary chamber and the side chamber similarly communicate with each other through the opening. Among these openings, an operating element is provided so that the opening through the primary chamber and the side chamber can be opened and closed, and the flow rate of liquid passing through the opening can be adjusted. It is desirable that the operating element has a screw-type positioning means for opening and closing the opening and adjusting the passage flow rate. The positioning means can maintain the closed state, and the influence of the liquid pressure fluctuation can be blocked.
[0010]
Further, a variable volume chamber is provided in the container body, and one of the variable portions that partition the variable volume chamber is communicated with the primary chamber, and the other of the variable portions is communicated with the secondary chamber. Further, the liquid leak notification means is controlled by the deformation of the variable volume chamber caused by the liquid leak. That is, the variable portion is a means for detecting liquid leakage, and is constituted by a flexible film commonly called a diaphragm or the like, for example. Other than the flexible membrane, it corresponds to a variable volume chamber having a structure of a piston cylinder device. That is, deformation includes enlargement and reduction.
[0011]
As the liquid leakage notification means, light emission such as a light bulb or a diode, or sound or vibration can be used. This informing means reports a liquid leak to a third party. As a result, the liquid leak is discovered and necessary repairs are made.
[0012]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. A liquid leakage detection apparatus 10 according to the present invention includes an apparatus main body 11 through which liquid flows. The apparatus main body 11 has an upstream primary chamber 12 and a downstream secondary chamber 13, and the upstream side and the downstream side are blocked by a partition wall 14, and is located upstream of the primary chamber. Is provided with a pressurized tank 15.
[0013]
The pressurized tank 15 is of a pressure-resistant structure, and has an open / close valve 17 at an appropriate location between the tank and the connecting portion 16 so that the liquid in the pipeline can be introduced into and shut off from the pressurized tank. Yes. The pressurized tank 15 is not only located upstream of the primary chamber 12 but also constitutes a part of the liquid leakage device 10 as shown in the embodiment, and is connected to the connection ports 18 and 19 of the device 10. One of them is provided upstream of the pressurized tank 15.
[0014]
The apparatus body 11 is provided with a side chamber 20 that communicates with the primary chamber 12 and the secondary chamber 13. The primary chamber 12 and the side chamber 20 communicate with each other through a primary side port 21, and the secondary chamber 13 and the side chamber 20 communicate with each other through a secondary side port 22. In the case of the embodiment, an operating element 23 for opening / closing and adjusting the flow rate is provided in the primary side opening 21, and this operating element 23 has a positioning means 24 having a screw structure.
[0015]
Further, the apparatus main body 11 is provided with a variable volume chamber 25. The illustrated variable volume chamber 25 is in a state defined by a variable portion 26, one of the variable portions 26 is connected to the primary chamber 12 by a small opening 27, and the other of the variable portions 26 is connected to the side chamber 20 by a gap 28. The pressure on the secondary chamber 13 side is introduced.
[0016]
A mechanism is provided in association with the variable portion 26 for operating the notification means 30 that notifies the liquid leakage by the deformation of the variable volume chamber 25. This mechanism enters the variable volume through a gap 28 with a hole formed in the wall of the variable volume chamber 25, is urged by a spring 29, and has a movable element 31 on a piston having a tip portion that contacts the variable portion 26, and a movable element. The magnet 32 provided in the child 31, the opening / closing part 33 shown as a reed switch disposed at a position that can overlap the movable range of the movable element 31, and the electric circuit 34 that connects the opening / closing part 33 and the notification means 30. It consists of.
[0017]
The liquid leakage detection apparatus 10 shown in FIG. 1 is used in a state where the primary side and the secondary side are blocked by the operation element 23 as shown in FIGS. FIG. 2 shows a state where there is no liquid leakage. Since the pressure in the primary chamber 12 and the pressure in the secondary chamber 13 are balanced, there is no change in the variable portion 26, and the magnet 32 moves away from the opening / closing portion 33. ing. The internal pressure in the pressurized tank 15 in this equilibrium state is H ₀ . When liquid leakage occurs on the secondary side, the pressure on the secondary side of the variable portion 26 falls below the pressure acting on the primary side of the variable portion 26, so that the variable portion 26 has an internal pressure H _{1 in the} pressurized tank 15. Since the magnet 32 moves to a position where the opening / closing part 33 is closed, the notification means 30 is activated (FIG. 3). During this time, the internal pressure H ₁ of the pressurizing tank 15 slightly decreases by the amount that the variable portion 26 moves and the primary chamber side expands ( H ₀ > H ₁ ).
[0018]
The liquid leak detection apparatus 10 according to the present invention can take various connection methods in relation to the part to be examined, and can take a unique configuration. FIG. 4 shows what is called a water pressure system in which the present apparatus 10 is interposed in a water supply pipe 35 to detect a water leak at the end side 36. Install. First, the main plug 38 is opened, the faucet on the end side 36 is opened, all the pipes through which water flows, the primary chamber 12, the secondary chamber 13, the side chamber 20, etc. are fully ventilated and the air is vented. Close the stopper. After that, in order to familiarize each part of the piping, it waits for several minutes to ten and several minutes and closes the operation element 23. If there is no water leakage, the amount of water on the secondary chamber side does not decrease and the primary chamber 12 and the secondary chamber 13 Since the pressure balance is maintained, the notification means 30 does not operate. However, if the notification means 30 is activated, it is a water leak notification. When a test was conducted in a certain water supply in Tokyo, when the operation unit 23 was closed and the notification means 30 was activated within one minute, water leakage of 0.6 cc or more (about one drop leaked every 7-8 seconds) or more In the operation within 3 minutes, there is a water leak of 0.2 cc per minute (about 1 drop in 20-25 seconds) or more, and in the operation within 6 minutes, 0.1 cc per minute (40-50 seconds) This indicates that there is more than one water leak.
[0019]
FIG. 5 shows a system in which a test pump 41 is connected to a location where the apparatus 10 is connected to a water main 40 and is switched by valves 42 and 43 to detect water leakage by the test pump 41. Reference numeral 44 denotes a drain valve. In this case, the valve 42 of the water main 40 and the faucet on the end side 45 are opened, the air is discharged as a full flow, the valve on the water main is closed, the valve 43 of the test pump 41 is opened, and the test pump 41 For example, the pressure of 1.75 Mpa is continuously applied to each pipe, and then the drain valve 44 is slowly opened at a rate of decreasing by 0.1 Mpa per minute, and the pressure is reduced to 1.0 Mpa while looking at the pressure gauge 46. , And the pressure adjustment operation is performed as many times as necessary, and when the pressure gauge 46 reaches 1.0 MPa, the drain valve 44 is closed. After the pressure adjustment work is completed, let the parts of the pipes fit for about 5 to 10 minutes, and then the valve 43 on the test pump side
Is closed, the operation element 23 is closed, and a water leak inspection is started. If the notification means 30 does not operate even after 10 minutes have passed after the operation element 23 is closed, it may be considered that there is no water leakage. It is the same as the case of the example of FIG. 4 that the amount of water leakage can be estimated as described above in the time until the lamp is turned on.
[0020]
FIG. 6 shows an example of a terminal device inspection method in which inspection is performed by pressurization on the downstream side, in contrast to the previous two cases being pressurization from the upstream side. In this example, the water discharge pipe to the faucet called the universal faucet 47 provided in the water supply pipe is removed, the apparatus 10 is attached via the dedicated adapter 48, the operator 23 is opened, and the universal faucet 47 is attached. open. After this, the main plug 49 of the water meter 50 is closed, and the system waits for about 5 to 10 minutes in order to familiarize each part of the pipe. Further, the operation element 23 is closed and the inspection is started. In this case, it may be considered that there is no possibility of water leakage if the notification means does not operate within 10 minutes. In this example, the pressure source on the primary side is water and compressed air sealed in the pressurized tank 15 , and the primary side pressure is kept constant, and when there is water leakage on the secondary side, the variable part 26 is used. The notification means 30 can be operated by continuing to apply pressure to the secondary side. It is important that the air in the pressurized tank is compressed with the pressurized pressure of the water supply, and the above-described action cannot be expected unless only water is contained.
[0021]
【The invention's effect】
Since the present invention is configured and operates as described above, the detection system is a closed system and, for example, the operation element 23 is closed within one minute by keeping the primary pressure constant by the pressure tank. When the notification means 30 is activated, there is a water leak of 0.6 cc / min (about one drop leaks in 7-8 seconds) or more, and if this is within 3 minutes, 0.2 cc / min (1 in 20-25 seconds) This is a highly accurate liquid leak indicating that there is more than 0.1 cc of water leakage per minute (40 to 50 seconds). It is understood that the detection can be performed and a remarkable effect is obtained .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a liquid leak detection apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a state without liquid leakage in the apparatus.
FIG. 3 is a cross-sectional view showing a state where there is also a liquid leak.
FIG. 4 is an explanatory diagram of a water pressure system using the device of the present invention.
FIG. 5 is also an explanatory diagram of a test pump system.
FIG. 6 is also an explanatory diagram of a terminal installation inspection method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Liquid leak detection apparatus 11 Apparatus main body 12 Primary chamber 13 Secondary chamber 15 Pressurized tank 20 Side chamber 21, 22 Through-hole 23 Operating element 25 Variable volume chamber 26 Variable part 27 Small opening 30 Notification means

Claims

管路等の空間に満たされた液体の漏れを検出するための装置であって、加圧側に通じる１次室と、末端側に通じる２次室、及び１次室と２次室に通じる側室とを装置本体に設け、１次室と２次室とを通ずる通口を開閉しかつ閉じ状態を保持可能な操作子を設け、さらに装置本体には可変容積室を設けるとともに、可変容積室を仕切る可変部の一方を１次室にまた可変部の他方を２次側に通じさせ、可変部の変化に伴って液漏れを知らせる報知手段を設け、１次室に通じる加圧側には加圧タンクを接続し、加圧タンクには、１次側における加圧圧力で圧縮された空気とこの圧縮空気の圧力を受けている液体とを封入し、２次側において液漏れを生じているときに１次側の圧力を一定に保ち、可変部を通して２次側に圧力を加え続けるように構成したことを特徴とする液漏れ検出装置。A device for detecting leakage of a liquid filled in a space such as a pipe line, a primary chamber communicating with a pressurizing side, a secondary chamber communicating with a terminal side, and a side chamber communicating with a primary chamber and a secondary chamber Is provided in the apparatus main body, and an operating element capable of opening and closing a passage through the primary chamber and the secondary chamber and maintaining a closed state is provided. Further, the apparatus main body is provided with a variable volume chamber, and the variable volume chamber is provided. One of the partitioning variable parts is connected to the primary chamber and the other of the variable parts is connected to the secondary side, and a notification means is provided to notify liquid leakage in accordance with the change of the variable part, and the pressurization side leading to the primary chamber is pressurized. When the tank is connected and the pressurized tank is filled with the air compressed by the pressurized pressure on the primary side and the liquid receiving the pressure of the compressed air, and the liquid leaks on the secondary side The primary side pressure is kept constant, and the pressure is continuously applied to the secondary side through the variable part. Leakage detecting apparatus characterized by a.

操作子は、通口を開閉しかつ通過液量を調節可能とするために、ねじ構造による位置決め手段を有している請求項１記載の液漏れ検出装置。 The liquid leakage detection device according to claim 1, wherein the operating element has positioning means having a screw structure so as to open and close the opening and adjust the amount of liquid passing therethrough.