JPS6361932A - Inspection instrument for leakage of buried pipe - Google Patents
Inspection instrument for leakage of buried pipeInfo
- Publication number
- JPS6361932A JPS6361932A JP20663786A JP20663786A JPS6361932A JP S6361932 A JPS6361932 A JP S6361932A JP 20663786 A JP20663786 A JP 20663786A JP 20663786 A JP20663786 A JP 20663786A JP S6361932 A JPS6361932 A JP S6361932A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- buried pipe
- flow path
- leakage
- fluid
- 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
- 238000007689 inspection Methods 0.000 title claims description 13
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000295 fuel oil Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000000737 periodic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
鼓１日と１
本発明は、中、小規模のボイラー給油等に用いる地下あ
るいは壁内配管の漏洩点検装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leak inspection device for underground or in-wall piping used for refueling small and medium-sized boilers.
瑛米孜亙
燃料油又は有害液体のパイプラインによる移送において
の漏洩を検出することは安全性、公害の面からみて極め
て重要であるが、このような問題を解決する手段として
は主として大規模な流体移送システムに適用されるもの
で例えば特公昭４７−２８６６５号公報が提案されてい
る。この公報に記載されているものは互いに離隔した送
出側と受入側に各々流量計を配設し、この各々の流量計
から流量に比例して発信する流量信号をとり出し。Detecting leaks during pipeline transportation of fuel oil or hazardous liquids is extremely important from the viewpoint of safety and pollution, but the means to solve such problems are mainly limited to large-scale For example, Japanese Patent Publication No. 47-28665 has proposed a method applied to a fluid transfer system. In the system described in this publication, flow meters are arranged on the sending side and the receiving side, which are separated from each other, and a flow rate signal is output from each flow meter in proportion to the flow rate.
受入側の流量信号に対し、送出側の流量信号を受入側地
点までの流量変化の伝播時間だけ遅延させた流量信号と
比較させ、この差から漏洩の有無を検出するものである
。しかし、このような手段は。The receiving side flow rate signal is compared with a flow rate signal obtained by delaying the sending side flow rate signal by the propagation time of the flow rate change to the receiving side point, and the presence or absence of leakage is detected from this difference. But such means.
石油パイプラインのように移送距離が数キロメートルか
ら数１０キロメートル等の規模のパイプラインの漏洩検
出には適していても、中、小企業。Although it is suitable for detecting leaks in pipelines with transport distances ranging from several kilometers to several tens of kilometers, such as oil pipelines, it is suitable for small and medium-sized enterprises.
旅館等のように数１０メートル程度のボイラー燃料油の
埋設管に適用できない。而して、近時、消防庁から各部
道府県消防主官部に対して施設の維持管理の一環として
の定期点検に関する指導指針が配布された。この指針に
よると「地下配管の漏洩の有無に関する点検」もあげら
れ、この方法として「ラインパックテスト、減圧による
方法又はこれらと同等以上の漏洩の有無が確認できる方
法により行なうこと」とされている。この中のラインパ
ックテストを第３図において説明する。It cannot be applied to underground boiler fuel oil pipes of several tens of meters, such as in hotels etc. Recently, the Fire and Disaster Management Agency has distributed guidance guidelines regarding periodic inspections as part of facility maintenance and management to each department and prefectural fire department. According to this guideline, ``inspection of underground piping for leakage'' is also mentioned, and this method should be ``carried out using a line pack test, depressurization method, or a method that can confirm the presence or absence of leakage of an equivalent or greater degree.'' . The line pack test among these will be explained with reference to FIG.
第３図は、従来のラインパックテストの一例を説明する
ための構成図で、１は地面、２は地下タンクで例えば燈
油等を蓋２１を開き、図示しない手段で貯蔵している。FIG. 3 is a configuration diagram for explaining an example of a conventional line pack test, in which 1 is on the ground, and 2 is an underground tank in which, for example, kerosene or the like is stored with the lid 21 open and by means not shown.
このタンク２にはバルブ３１を介して大気と連通ずる通
気孔３とバルブ５１を介して所定水頭に加圧するポンプ
５に導通する吸入管４とが配設されている。ポンプ５で
昇圧された燃料油は配管６により図示しないボイラー等
の負荷に圧送される。ここで、例えば、配管６の一部は
地面Ａ、Ｂ点間６１で埋設されるとする。埋設管６１の
ラインパックテストは埋設管６１の上下流の地上部に配
設された各々第１バルブ８と第２バルブ９とを閉止し、
この間の圧力の時間的変化から漏洩の有無を検査するも
のである。This tank 2 is provided with a vent hole 3 that communicates with the atmosphere via a valve 31, and a suction pipe 4 that communicates with a pump 5 that pressurizes the tank to a predetermined water head via a valve 51. The fuel oil pressurized by the pump 5 is pumped through a pipe 6 to a load such as a boiler (not shown). Here, for example, it is assumed that a part of the pipe 6 is buried in the ground between points A and B 61. The line pack test of the buried pipe 61 is performed by closing the first valve 8 and the second valve 9, which are installed above ground and downstream of the buried pipe 61, respectively.
The presence or absence of leakage is checked based on the temporal change in pressure during this period.
また、減圧法は逆に埋設部の流体を排除し、この部分の
圧力上昇の有無によって漏洩を判断するものである。In contrast, the depressurization method removes the fluid in the buried portion and determines whether there is a leak based on the presence or absence of pressure rise in this portion.
従来技術の問題点
以上に述べたラインパックテスト又は減圧法による漏洩
点検方法は、加圧又は減圧手段並びに圧力計の配設等が
必要となるため小規模施設である旅館等では費用が高く
つくので定期点検の指導指針が出されても広範囲で実行
することは困難であった。Problems with the Prior Art The leakage inspection method using the line pack test or depressurization method described above requires pressurization or depressurization means and the installation of a pressure gauge, which is expensive for small-scale facilities such as inns. Therefore, even if guidelines for periodic inspections were issued, it was difficult to implement them over a wide range of areas.
問題点解決の手段
本発明は、前記問題点を解決するため「ラインパックテ
スト又は減圧法と同等以上の漏洩の有無を確認できる方
法」を実現するもので、前記第１バルブ８に微小流量計
のバイパスラインを配設し、前記第２バルブ９を閉止し
た状態で微小流量計の作動を検出するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention realizes "a method that can confirm the presence or absence of leakage to a degree equivalent to or higher than that of the line pack test or depressurization method", and the first valve 8 is equipped with a microflow meter. A bypass line is provided, and the operation of the microflow meter is detected with the second valve 9 closed.
災１鮮
第１図は、本発明の一実施例を説明するための構成図で
１図中、第３図と同じ機能をもつ要素には第３図の場合
と同一の参照番号を付しその説明を省く。而して、本発
明においては、第１バルブ８に並列に第３バルブ１０と
微小流量計７と第４バルブとを順次に縦続接続したバイ
パス流路を配設し、第１．第２バルブを閉止し、次に、
第３゜第４バルブを開路してポンプ５を作動させて加圧
するもので、埋設管６１に漏洩があると微小流量計５は
作動し、漏洩流量があることを示す。従って、微小流量
計５の作動を検出して￥ｇ報を発信させることもできる
。Figure 1 is a configuration diagram for explaining one embodiment of the present invention, and elements having the same functions as those in Figure 3 are given the same reference numbers as in Figure 3. I will omit that explanation. Accordingly, in the present invention, a bypass flow path is arranged in parallel with the first valve 8 in which the third valve 10, the micro flowmeter 7, and the fourth valve are successively connected in cascade. Close the second valve, then
The 3rd and 4th valves are opened to operate the pump 5 and pressurize it. If there is a leak in the buried pipe 61, the micro flowmeter 5 is activated and indicates that there is a leakage flow rate. Therefore, it is also possible to detect the operation of the micro flow meter 5 and transmit the ¥g information.
第２図は、第１．第３および第４バルブを除くため三方
切換弁１２を配設した実施例を示す図で、ポンプ５から
流入する流れを開口Ｐ２から開口Ｐ１に切換えることに
より微小流量計７と連通して漏洩の有無が確認できる。Figure 2 shows the 1. This is a diagram showing an embodiment in which a three-way switching valve 12 is provided to remove the third and fourth valves, and the flow flowing in from the pump 5 is switched from the opening P2 to the opening P1, thereby communicating with the microflow meter 7 to prevent leakage. You can check the presence or absence.
漏洩点検方法外は開口Ｐ１から開口Ｐ２に切換え第２バ
ルブ９を開路する。In cases other than the leakage inspection method, the second valve 9 is opened by switching from the opening P1 to the opening P2.
第１図ではタンク２が地下に埋設されている場合につい
て述べたが、タンクが地上に必要な水頭をもつ高さに配
設される場合でも同様の要素を組合せることができる。Although FIG. 1 describes the case where the tank 2 is buried underground, similar elements can be combined even when the tank is installed above ground at a height that provides the required water head.
効 果
上述のように、本発明の埋設管点検装置によると、第１
バルブに高感度な微小流量計を配設したバイパスライン
を配設するだけの簡単な構成で微小な漏洩が検出でき、
また、操作は極めて簡単であり、しかも安価であるから
危険物取扱い上ラインパックテスト又は減圧法と比較し
て同様以上の効果をあげることができる。Effects As mentioned above, according to the buried pipe inspection device of the present invention, the first
Minute leaks can be detected with a simple configuration of simply installing a bypass line with a highly sensitive microflow meter on the valve.
In addition, since it is extremely simple to operate and is inexpensive, it can be as effective as or better than the line pack test or depressurization method in handling dangerous materials.
【図面の簡単な説明】
第１図は、本発明の埋設管点検装置の構成図、第２図は
本発明の微小流量計７と第１バルブ８とを切換える三方
切換え弁を配設した他の実施例を示す構成図、第３図は
従来の埋設管点検装置を説明するための構成図である。
２・・・地下タンク、３・・・通気孔、４・・・吸入管
、５・・・ポンプ、７・・・微小流量計、８，９，１０
．１１・・・開閉バルブ、６１・・・埋設管。
第 １ 図
第 ２ 図[Brief Description of the Drawings] Fig. 1 is a configuration diagram of the buried pipe inspection device of the present invention, and Fig. 2 is a diagram showing the structure of the buried pipe inspection device of the present invention, and Fig. 2 is a diagram showing the configuration of the buried pipe inspection device of the present invention. Fig. 3 is a block diagram illustrating a conventional buried pipe inspection device. 2... Underground tank, 3... Ventilation hole, 4... Suction pipe, 5... Pump, 7... Micro flow meter, 8, 9, 10
．． 11... Opening/closing valve, 61... Buried pipe. Figure 1 Figure 2
Claims (2)
るタンクから、上記流体をボイラー等の負荷に移送する
配管の埋設された埋設管外の上下流部に流体を流通遮断
する各々第１バルブと第２バルブとを配設するとともに
第１バルブに流路開閉手段と微小流量計とを縦続接続し
たバイパス流路を配設し、前記第１、第２バルブを閉止
したときバイパス流路を開路し、該バイパス流路の流体
流れの有無を前記微小流量計の読みにより求め、埋設管
の漏洩を点検することを特徴とする埋設管漏洩点検装置
。(1) Each block that interrupts the flow of fluid from a tank storing a dangerous fluid such as fuel oil with a predetermined water head to the upstream and downstream areas outside the buried pipe that transfers the fluid to a load such as a boiler. A first valve and a second valve are provided, and a bypass flow path is provided in which the first valve is connected in cascade with a flow path opening/closing means and a microflow meter, and when the first and second valves are closed, the bypass flow path is disposed. A buried pipe leakage inspection device characterized in that a flow path is opened, and the presence or absence of fluid flow in the bypass flow path is determined by readings from the microflow meter to check for leakage in the buried pipe.
弁の弁口の一つにバイパス流路における微小流量計を配
設したことを特徴とする特許請求の範囲第（１）項に記
載の埋設管漏洩点検装置。(2) Claim (1) characterized in that the first valve is a three-way switching valve, and one of the valve ports of the three-way switching valve is provided with a microflow meter in the bypass flow path. The underground pipe leakage inspection device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20663786A JPS6361932A (en) | 1986-09-02 | 1986-09-02 | Inspection instrument for leakage of buried pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20663786A JPS6361932A (en) | 1986-09-02 | 1986-09-02 | Inspection instrument for leakage of buried pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6361932A true JPS6361932A (en) | 1988-03-18 |
Family
ID=16526657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20663786A Pending JPS6361932A (en) | 1986-09-02 | 1986-09-02 | Inspection instrument for leakage of buried pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6361932A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053535A (en) * | 1990-03-26 | 1991-10-01 | Mitsubishi Gas Chemical Company, Inc. | Process for producing α-hydroxyisobutyric acid |
| DE102007050284A1 (en) | 2007-10-18 | 2009-04-23 | Evonik Röhm Gmbh | Process for amidation of nitriles in the presence of sulfuric acid |
| JP2015212714A (en) * | 2015-08-26 | 2015-11-26 | 株式会社タツノ | Leak detection method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112543A (en) * | 1979-02-22 | 1980-08-30 | Osaka Gas Co Ltd | Leak detection method of provided pipe |
-
1986
- 1986-09-02 JP JP20663786A patent/JPS6361932A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112543A (en) * | 1979-02-22 | 1980-08-30 | Osaka Gas Co Ltd | Leak detection method of provided pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053535A (en) * | 1990-03-26 | 1991-10-01 | Mitsubishi Gas Chemical Company, Inc. | Process for producing α-hydroxyisobutyric acid |
| DE102007050284A1 (en) | 2007-10-18 | 2009-04-23 | Evonik Röhm Gmbh | Process for amidation of nitriles in the presence of sulfuric acid |
| JP2015212714A (en) * | 2015-08-26 | 2015-11-26 | 株式会社タツノ | Leak detection method and device |
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