JPS60247132A - Method for examining leakage of tank - Google Patents
Method for examining leakage of tankInfo
- Publication number
- JPS60247132A JPS60247132A JP10166184A JP10166184A JPS60247132A JP S60247132 A JPS60247132 A JP S60247132A JP 10166184 A JP10166184 A JP 10166184A JP 10166184 A JP10166184 A JP 10166184A JP S60247132 A JPS60247132 A JP S60247132A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- pressure
- liquid
- container
- airtight
- 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.)
- Granted
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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は液体タンクの漏洩検査方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for inspecting leaks in liquid tanks.
一般に液体を貯蔵するための液体タンクにおいては、そ
の漏洩の有無を定期的に検査する必要があり、従来にお
いては、検査すべきタンク内に通ずる管の開口を閉じて
タンクを気密ならしめ、このタンク内にガス等を充填し
て一定の加圧状態とし、タンクに漏洩があるときには時
間の経過と共に内部のガスが漏出してタンク内圧力が低
下するから、この圧力低下の有無を圧力針により検査す
ることにより、当該タンクの漏洩の有無を検査している
。In general, liquid tanks for storing liquids need to be periodically inspected for leakage. Conventionally, the opening of the pipe leading into the tank to be inspected is closed to make the tank airtight. A tank is filled with gas, etc. to maintain a constant pressure, and if there is a leak in the tank, the internal gas leaks out over time and the pressure inside the tank decreases.The presence or absence of this pressure drop can be detected using a pressure needle. Through inspection, the presence or absence of leakage from the tank is checked.
然しなから斯かる検査方法においては、タンク内を高圧
状態とするために、タンクに漏洩があるときには貯蔵液
体が多量に漏出するようになり、又タンクを気密ならし
めるためにはタンク内に通ずる通気管、検尺管、給液管
等の外端開口を気密に封することが必要であるが、当該
気密封じ状態或いは封じ部材が不完全な場合にはタンク
内に高圧ガスが充填されたときにこの部分から高圧ガス
及び貯蔵液体が噴出するようになる。しかも貯蔵液体が
ガソリン等の可燃物或いは毒物その他の危険性流体の場
合には非常に危険な事態となる。以上の事情から従来の
検査方法を実施するには貯蔵液体を排出除去してタンク
を空にする必要があり、このため作業に非常な長時間を
要する上、排出した貯蔵液体を検査完了迄の間一時的に
貯留するための容器が必要であり、しかもタンクは通常
大容量であるためかなり大きな容器を用意しなければな
らず、又検査時期が貯蔵液体の少ないときに限られる等
積々の欠点がある。However, in this inspection method, the inside of the tank is kept under high pressure, so if there is a leak in the tank, a large amount of the stored liquid will leak out, and in order to make the tank airtight, a large amount of the stored liquid will leak out. It is necessary to airtightly seal the outer end openings of vent pipes, measuring pipes, liquid supply pipes, etc., but if the airtight seal or sealing member is incomplete, high pressure gas may be filled in the tank. At times, high-pressure gas and stored liquid can emerge from this area. Moreover, if the stored liquid is a flammable substance such as gasoline, a poisonous substance, or other dangerous fluid, this becomes a very dangerous situation. Due to the above circumstances, in order to implement the conventional inspection method, it is necessary to drain and remove the stored liquid and empty the tank, which requires a very long time, and it is necessary to carry out the discharged stored liquid until the inspection is completed. A container for temporary storage is required, and since tanks usually have a large capacity, a fairly large container must be prepared, and the inspection period is limited to when the stored liquid is low. There are drawbacks.
このような欠点を除くための方法として特公昭５’ｌ−
４６４９５号「タンクの漏洩検査方法」があるが、この
方法ではタンク内の貯蔵液体、例えばガソリンをタンク
外に吸引し容器内に貯蔵する工程を含むためその作業中
容器７内に吸引したタンク内の貯蔵液体が外部に漏れる
おそれがあり極めて危険であった。As a method to eliminate such drawbacks,
No. 46495, ``Tank Leakage Inspection Method,'' but this method includes the step of sucking the liquid stored in the tank, such as gasoline, out of the tank and storing it in the container. The stored liquid could leak outside, which was extremely dangerous.
本発明は以上の如き欠点を除き、極めて簡単に又大型の
装置を要することなく、しかも何ら危険を伴わずに流体
タンクの漏洩の有無を検査し得る方法を提供するもので
ある。The present invention eliminates the above-mentioned drawbacks and provides a method that allows a fluid tank to be inspected for leakage very simply, without requiring large-scale equipment, and without any danger.
本発明のタンクの漏洩検査方法は、貯蔵液体が貯留され
ている液体タンクを気密に閉じる工程と、このタンク上
部に吸引管を介して接続した気密液体容器内の液体を排
除することによってこの気密液体容器内に前記貯蔵タン
ク内の気体の一部を吸引し、前記タンク内を一定の減圧
状態ならしめる工程と、その後このタンク内の圧力上昇
の有無を検査する工程と、検査終了後前記気密容器から
排除した前記液体に対応する量の液体を前記気密容器内
に導入することによって前記タンクから吸引した気体を
前記タンク内に還流せしめる工程とより成ることを特徴
とする。The tank leakage inspection method of the present invention includes the steps of airtightly closing a liquid tank in which stored liquid is stored, and eliminating the liquid in an airtight liquid container connected to the upper part of this tank via a suction pipe. A step of suctioning a part of the gas in the storage tank into a liquid container to bring the inside of the tank into a certain reduced pressure state, a step of inspecting whether there is a pressure increase in the tank, and a step of checking the airtightness after the inspection is completed. The method is characterized by comprising the step of introducing into the airtight container an amount of liquid corresponding to the liquid removed from the container, thereby causing the gas sucked from the tank to flow back into the tank.
以下図面により本発明実施の一例を説明する。An example of implementing the present invention will be described below with reference to the drawings.
第１図において、１は検査すべき地下タンク、２は通気
管、３は検尺管、４は給液管、５は開閉弁を介して検尺
管３に接続した自記圧計、６は貯蔵液体、例えばガソリ
ンを示し、本発明においては、水等の液体を入れた小型
気密容器７の上部に開閉弁８及び連通管９を介して前記
検尺管３の上部を連通せしめ、この検尺管３の中間部に
は、一端を基準圧力源１０に接続したマノメータ１１の
他端を接続せしめる。この基準圧力源１ｏとしては大気
を用いることも可能である。又前記小型気密容器７の下
部はフレキシブルチューブ１２及び開閉弁１３を介して
上下方向移動自在な液溜め１４の下部に連通せしめる。In Figure 1, 1 is an underground tank to be inspected, 2 is a ventilation pipe, 3 is a measuring tube, 4 is a liquid supply pipe, 5 is a self-recording pressure gauge connected to the measuring tube 3 via an on-off valve, and 6 is a storage In the present invention, the upper part of the measuring tube 3 is communicated with the upper part of a small airtight container 7 containing a liquid such as water through an on-off valve 8 and a communicating pipe 9, and the measuring tube 3 is One end of the manometer 11 is connected to a reference pressure source 10 and the other end of the manometer 11 is connected to the middle part of the tube 3. It is also possible to use the atmosphere as this reference pressure source 1o. Further, the lower part of the small airtight container 7 is communicated via a flexible tube 12 and an on-off valve 13 to a lower part of a liquid reservoir 14 which is vertically movable.
本発明方法においては、先ず通気管２、給液管４に盲蓋
を施して前記タンク１内を気密状態とし、液溜め１４を
小型気密容器７より下方の位置として開閉弁１３を開く
。この結果容器７内の液体が液溜め１４内に流れ、その
結果容器７の上部に負圧が生じる。従って開閉弁８を開
いてこの負圧によって検尺管３を介してタンク１内の貯
蔵液体６上の気体の一部が容器７内に移し、タンク１内
空間の圧力を減少せしめる。In the method of the present invention, first, the vent pipe 2 and the liquid supply pipe 4 are covered with blind covers to make the inside of the tank 1 airtight, the liquid reservoir 14 is positioned below the small airtight container 7, and the on-off valve 13 is opened. As a result, the liquid in the container 7 flows into the liquid reservoir 14, resulting in a negative pressure in the upper part of the container 7. Therefore, the on-off valve 8 is opened, and a part of the gas on the stored liquid 6 in the tank 1 is transferred into the container 7 via the measuring tube 3 due to this negative pressure, thereby reducing the pressure in the space inside the tank 1.
このようにタンク１内空間の圧力を減少せしめた状態で
開閉弁８を閉じて検尺管３の上部を封する。このときマ
ノメータ１１にはタンク１内の減圧状態に応じて基準圧
力源１０の圧力との差Ｉ（が生ずる。With the pressure inside the tank 1 reduced in this manner, the on-off valve 8 is closed to seal the upper part of the measuring tube 3. At this time, a difference I between the pressure of the reference pressure source 10 and the pressure of the reference pressure source 10 is generated in the manometer 11 depending on the reduced pressure state in the tank 1.
然るにタンク１等に漏洩があるときには、タンク１内が
減圧状態であるため外部から空気が侵入し、この結果時
間の経過と共にタンク１内の圧力が上昇するからマノメ
ータ１１における圧力差Ｈが小さくなる。従ってこの圧
力差Ｈが減少すればこれによりタンク１に漏洩があるこ
とが判るから、所要の措置を講する。又圧力差Ｈが減少
しなければタンク１には漏洩がないのであるから、開閉
弁８を開き、液溜め１４を点線に示すように容器７上の
位置に上昇せしめて液溜め１４内に貯留せしめておいた
液体を容器７内に戻す。この結果容器７内の気体はタン
ク１内に戻される。However, when there is a leak in the tank 1, etc., air enters from the outside because the pressure inside the tank 1 is reduced, and as a result, the pressure inside the tank 1 increases over time, so the pressure difference H at the manometer 11 becomes smaller. . Therefore, if this pressure difference H decreases, this indicates that there is a leak in the tank 1, and necessary measures are taken. Furthermore, since there is no leakage in the tank 1 unless the pressure difference H decreases, the on-off valve 8 is opened, the liquid reservoir 14 is raised to a position above the container 7 as shown by the dotted line, and the liquid is stored in the reservoir 14. Return the dampened liquid to the container 7. As a result, the gas in the container 7 is returned to the tank 1.
本発明タンクの漏洩検査方法は以上の通りであって、タ
ンクｌ内を減圧状態として検査を行うため当該タンク１
に漏洩があっても貯蔵液体の漏出を促進せしめることが
なくてむしろこれを制御すると共に、万一気密封じ部が
不完全であってもガス或いは貯蔵液体が噴出する等の惧
れは皆無であって貯蔵液体が危険物であっても極めて安
全裡に検査を行うことができる。The leakage inspection method for a tank according to the present invention is as described above.
Even if there is a leak, it will not accelerate the leakage of the stored liquid, rather it will be controlled, and even if the airtight part is incomplete, there is no risk of gas or stored liquid spewing out. Therefore, even if the stored liquid is dangerous, it can be inspected extremely safely.
又タンク１内を減圧状態とする方法は、タンク１を気密
とした状態で貯蔵液体６上の気体を吸い上げる方法であ
って、貯蔵液体６をタンク外に取り出さず、従って貯蔵
液体、例えばガソリンによって外部が汚染されるおそれ
がない。又容器７内に取り出したタンク１内の気体は検
査後再びタンク１内に戻されるからこの気体によって大
気が汚染されることもない。In addition, the method for reducing the pressure inside the tank 1 is to suck up the gas on the stored liquid 6 while keeping the tank 1 airtight, without taking out the stored liquid 6 outside the tank. There is no risk of contamination of the outside. Further, since the gas in the tank 1 taken out into the container 7 is returned to the tank 1 after inspection, the atmosphere will not be contaminated by this gas.
尚本発明の他の実施例においては第２図に示すように移
動自在な液溜め１４の代わりに固定の液溜め１５を用い
、この液溜め１５と容器７間をポンプ１６で連通し、液
溜め１５を上下動する代わりに所定量の液体をポンプ１
６により容器７から液溜め１５内に移し、又それを戻す
ようにしても良い。In another embodiment of the present invention, as shown in FIG. 2, a fixed liquid reservoir 15 is used instead of the movable liquid reservoir 14, and a pump 16 is used to communicate between the liquid reservoir 15 and the container 7. Instead of moving the reservoir 15 up and down, the pump 1 pumps a predetermined amount of liquid.
6 may be used to transfer the liquid from the container 7 into the liquid reservoir 15 and return it.
尚本発明においては種々変更を加えることが可能である
。例えば、容器７をタンク１に検尺管３を介して接続せ
ずに容器７に専用の吸上管を設け、これをタンクＩの適
宜の開口に気密に挿入せしめるようにすることができる
。マノメータ１１についてもこれを検尺管３に接続せず
他のタンク１内に通ずるものに接続してもよく、或いは
タンク１に既設の真空計を代用することもできる。Note that various modifications can be made to the present invention. For example, instead of connecting the container 7 to the tank 1 via the measuring tube 3, the container 7 may be provided with a dedicated suction pipe, and this can be inserted into an appropriate opening of the tank I in an airtight manner. The manometer 11 may also be connected to another tank 1 instead of being connected to the measuring tube 3, or a vacuum gauge already installed in the tank 1 may be used instead.
本発明は上記実施例におけるように、その外面状態を検
査することのできない地下タンク等に対して特に好適で
ある。The present invention, as in the above embodiments, is particularly suitable for underground tanks and the like whose external surface conditions cannot be inspected.
以上のように本発明タンクの漏洩検査方法によれば、危
険な事態が生ずる惧れが全くなくて極めて安全に、又極
めて容易に短時間のうちにタンクの漏洩の有無を確実に
検査することができ、要する装置も小型で移動が容易で
ある等大きな利益が得られる。As described above, according to the tank leakage testing method of the present invention, the presence or absence of tank leakage can be reliably tested extremely safely, extremely easily, and within a short period of time without any risk of any dangerous situation occurring. This provides great benefits, such as the fact that the required equipment is small and easy to move.
第１図は本発明タンクの漏洩検査方法の一実施例の説明
図、第２図は本発明の他の実施例説明図である。
ｌ・・・タンク、２・・・通気管、３・・・検尺管、４
・・・給液管、５・・・自記圧計、６・・・貯蔵液体、
７・・・容器、８，１３ ・・・開閉弁、９・・・連通
管、１０・・・基準圧力源、１１・・・マノメータ、１
２・・・フレキシブルチューブ、１３・・・開閉弁、１
４．１５ ・・・液溜め、１６・・・ポンプ。FIG. 1 is an explanatory diagram of one embodiment of the tank leakage testing method of the present invention, and FIG. 2 is an explanatory diagram of another embodiment of the present invention. l...Tank, 2...Vent pipe, 3...Measurement tube, 4
...Liquid supply pipe, 5...Self-recording pressure gauge, 6...Stored liquid,
7... Container, 8, 13... Open/close valve, 9... Communication pipe, 10... Reference pressure source, 11... Manometer, 1
2...Flexible tube, 13...Opening/closing valve, 1
4.15...liquid reservoir, 16...pump.
Claims (1)
程と、このタンク上部に吸引管を介して接続した気密液
体容器内の液体を排除することによってこの気密液体容
器内に前記貯蔵タンク内の気体の一部を吸引し、前記タ
ンク内を一定の減圧状態ならしめる工程と、その後この
タンク内の圧力上昇の有無を検査する工程と、検査終了
後前記気密容器から排除した前記液体に対応する量の液
体を前記気密容器内に導入することによって前記タンク
から吸引した気体を前記タンク内に還流せしめる工程と
より成ることを特徴とするタンクの漏洩検査方法。A process of airtightly closing a liquid tank in which stored liquid is stored, and removing the liquid in an airtight liquid container connected to the upper part of this tank via a suction pipe, so that the gas in the storage tank is released into this airtight liquid container. A step of suctioning a part of the liquid to bring the inside of the tank into a constant reduced pressure state, a step of inspecting whether there is a pressure increase inside the tank, and an amount corresponding to the liquid removed from the airtight container after the inspection is completed. A method for inspecting leakage of a tank, comprising the step of introducing a liquid into the airtight container to cause gas sucked from the tank to flow back into the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10166184A JPS60247132A (en) | 1984-05-22 | 1984-05-22 | Method for examining leakage of tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10166184A JPS60247132A (en) | 1984-05-22 | 1984-05-22 | Method for examining leakage of tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60247132A true JPS60247132A (en) | 1985-12-06 |
| JPH027015B2 JPH027015B2 (en) | 1990-02-15 |
Family
ID=14306554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10166184A Granted JPS60247132A (en) | 1984-05-22 | 1984-05-22 | Method for examining leakage of tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60247132A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS638526A (en) * | 1986-06-27 | 1988-01-14 | Yukio Haezuka | Inspection of leakage for underground tank |
| US4915507A (en) * | 1987-07-17 | 1990-04-10 | Janotta Louis J | Liquid average temperature measuring apparatus and method |
| US5400646A (en) * | 1992-09-30 | 1995-03-28 | Mepco, Inc. | Fluid containment monitoring system |
-
1984
- 1984-05-22 JP JP10166184A patent/JPS60247132A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS638526A (en) * | 1986-06-27 | 1988-01-14 | Yukio Haezuka | Inspection of leakage for underground tank |
| US4915507A (en) * | 1987-07-17 | 1990-04-10 | Janotta Louis J | Liquid average temperature measuring apparatus and method |
| US5400646A (en) * | 1992-09-30 | 1995-03-28 | Mepco, Inc. | Fluid containment monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH027015B2 (en) | 1990-02-15 |
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