JPS6160960B2 - - Google Patents
Info
- Publication number
- JPS6160960B2 JPS6160960B2 JP2716181A JP2716181A JPS6160960B2 JP S6160960 B2 JPS6160960 B2 JP S6160960B2 JP 2716181 A JP2716181 A JP 2716181A JP 2716181 A JP2716181 A JP 2716181A JP S6160960 B2 JPS6160960 B2 JP S6160960B2
- Authority
- JP
- Japan
- Prior art keywords
- space
- gas
- layer
- flammable
- inert gas
- 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.)
- Expired
Links
- 239000007789 gas Substances 0.000 claims description 37
- 239000011261 inert gas Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 description 9
- 238000009423 ventilation Methods 0.000 description 7
- 238000004880 explosion Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Description
【発明の詳細な説明】
この発明は比較的細長い空間内に生じた可燃性
ガスの除去方法に係り、特にトンネル、洞道等の
如き比較的細長い空間内に漏洩等によつて生じた
可燃性ガスを不活性ガスによる不燃層で挾んだ
後、可燃性ガス層をピストンフロして空間内より
外部へ安全且つ確実に除去することのできる除去
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing flammable gas generated in a relatively long and narrow space, and particularly to a method for removing flammable gas generated due to leakage in a relatively long and narrow space such as a tunnel or a cave. The present invention relates to a removal method that can safely and reliably remove a flammable gas layer from inside a space to the outside by piston flow after gas is sandwiched between non-combustible layers made of inert gas.
一般にトンネル、洞道等の比較的細長い密閉空
間にはこれに沿つて液体あるいは気体の可燃性流
体を輸送するための配管が敷設されている。とこ
ろで、これらトンネルあるいは洞道等内で輸送配
管から可燃性流体が漏洩することが想定し得る。
このように可燃性流体がトンネル等の細長い密閉
空間内に漏洩し、更に爆発限界に入ると、極めて
危険事故の発生原因になることが予想される。 Generally, piping for transporting a liquid or gaseous flammable fluid is laid along a relatively long and narrow closed space such as a tunnel or a cave. Incidentally, it is conceivable that flammable fluid may leak from transport piping within these tunnels or caverns.
If flammable fluid leaks into a long, narrow, closed space such as a tunnel and reaches the explosive limit, it is expected to cause an extremely dangerous accident.
従来、トンネル、洞道等の比較的細長い空間内
に可燃性流体を輸送するための配管等を施設した
場合にはこの空間内に予め可燃性ガスの漏洩を検
知するための検知器を設けると共に換気装置を設
けて、上記検知器により可燃性ガスの漏洩を検知
すると同時に空間内を換気装置により換気し続け
て、可燃性ガスの漏洩乃至流出源の処置を施す方
法が採用されている。 Conventionally, when piping, etc. for transporting flammable fluids is installed in a relatively long and narrow space such as a tunnel or a cave, a detector is installed in advance to detect leakage of flammable gas within this space. A method has been adopted in which a ventilation system is provided, and the detector detects the leakage of flammable gas, and at the same time, the space is continued to be ventilated by the ventilation system to take measures for the source of the leakage or outflow of the combustible gas.
しかし乍ら、この方法にあつては漏洩源を処置
するためにトンネル等内に立入る際に、万一爆発
限界内に入り、更に何らかの着火源が存在すれば
爆発の危険があつた。 However, with this method, when entering a tunnel or the like to treat the source of a leak, there was a danger of an explosion if the tunnel was to fall within the explosion limit and some kind of ignition source was present.
そこで、このようなトンネル、洞道等の空間内
に可燃性ガスの輸送配管を配設した場合に、これ
らの空間内の雰囲気を不活性ガスにより爆発限界
外（不燃域）に保持する方法が案出されている。 Therefore, when flammable gas transportation piping is installed in spaces such as tunnels and tunnels, there is a method to maintain the atmosphere in these spaces outside the explosion limit (non-flammable range) using inert gas. It has been devised.
この方法にあつては空間内が常時酸素濃度の低
いいわゆる酸欠ガスになつているために、この雰
囲気ガスが外部に流出した場合に危険である。ま
たこの雰囲気ガス中に入つてメンテナンスを行う
場合には充分なる安全対策が必要である。更に雰
囲気ガスを爆発限界外に常時保持するために、濃
度コントロールが必要である。 In this method, the space is always in a so-called oxygen-deficient gas with a low oxygen concentration, so it is dangerous if this atmospheric gas leaks outside. Further, when performing maintenance by entering this atmospheric gas, sufficient safety measures are required. Furthermore, concentration control is necessary to keep the atmospheric gas above the explosive limit at all times.
そこで、本発明はトンネル、洞道等の比較的細
長い空間内に漏洩乃至流出する可燃性ガスを安全
に除去するための方法における問題点に鑑み、こ
れらを有効に解決するために創案されるに至つた
ものである。 Therefore, the present invention has been devised to effectively solve the problems in a method for safely removing flammable gas leaking or flowing out into relatively long and narrow spaces such as tunnels and caves. It has been reached.
本発明の目的はトンネル、洞道等の比較的細長
い空間において漏洩乃至流出する可燃性ガスを安
全且つ確実に除去することができ、防災対策面か
ら極めて優れた方法を提供するものである。 An object of the present invention is to provide a method that can safely and reliably remove flammable gas leaking or flowing out in a relatively long and narrow space such as a tunnel or a cave, and is extremely excellent in terms of disaster prevention measures.
特に本発明の方法は比較的細長い空間内におい
て漏洩乃至流出した可燃性ガス層の両側部に不活
性ガスによる不燃層を形成し、これら不活性ガス
層即ち不燃層によつて不活性ガス層をサンドイツ
チしつつシールし、この状態を維持しつつピスト
ンフロすることにより、上記目的を達成するもの
である。 In particular, the method of the present invention forms a noncombustible layer of inert gas on both sides of a combustible gas layer that has leaked or flowed out in a relatively long and narrow space, and the inert gas layer is formed by these inert gas layers, that is, the noncombustible layer. The above object is achieved by sealing while sandwiching and flushing the piston while maintaining this state.
次に本発明の方法を具体的装置に従つて詳述す
る。 Next, the method of the present invention will be explained in detail with reference to a specific apparatus.
先ず第１図に示す如くトンネル、洞道等の比較
的細長い空間１にはこれに沿つて可燃性ガス流体
を輸送するための配管２が設けられている。この
ような比較的細長い空間１内にはこれに沿つて適
宜間隔乃至距離を隔てて可燃性ガスの漏洩検知器
３が配設される。また、上記空間１内には可燃性
ガス流体輸送配管２に沿つて不活性ガス供給管４
が設けられる。この不活性ガス供給管４にはその
長手方向に沿つて適宜間隔を隔てて複数個の不活
性ガス噴出ノズル５が設けられている。また、こ
の不活性ガス噴出ノズル５のそれぞれにはリレー
回路等によつて遠隔操作可能な開閉弁６が設けら
れている。 First, as shown in FIG. 1, a relatively long and narrow space 1 such as a tunnel or a cave is provided with a pipe 2 along which a flammable gaseous fluid is transported. In such a relatively long and narrow space 1, combustible gas leak detectors 3 are arranged along the space at appropriate intervals or distances. Additionally, in the space 1, an inert gas supply pipe 4 is provided along the flammable gas fluid transport pipe 2.
is provided. This inert gas supply pipe 4 is provided with a plurality of inert gas jetting nozzles 5 at appropriate intervals along its longitudinal direction. Further, each of the inert gas jetting nozzles 5 is provided with an on-off valve 6 that can be remotely operated by a relay circuit or the like.
また、上記空間１にはその長手方向に沿つて適
宜間隔乃至距離を隔てて開閉扉７が複数個配設さ
れ、空間１内を任意数に分割区画し得るように構
成されている。 Further, a plurality of opening/closing doors 7 are disposed in the space 1 at appropriate intervals or distances along the longitudinal direction of the space 1, so that the space 1 can be divided into an arbitrary number of compartments.
更に、空間１の出入口あるいは任意な中間には
換気口８が設けられており、これらの換気口８に
は換気フアン９が設けられている。 Furthermore, ventilation ports 8 are provided at the entrance and exit of the space 1 or at any intermediate point, and these ventilation ports 8 are provided with ventilation fans 9.
そこで、本方法を第２図に従つて述べるに、先
ず第２図Ａに示す如くトンネル、洞道等の比較的
細長い空間１内に配設された輸送配管２から可燃
性ガス流体Ｇが漏洩した場合には漏洩検知器３に
よつて漏洩とその漏洩場所乃至位置を検知する。
従つて、前述した如く上記空間１内にはこれに沿
つて適宜間隔に複数個の検知器３が設けられてい
る。また、この漏洩検知器３は温度計、ガス検知
計等によつて形成され、漏洩とその位置を演算検
出するように構成されている。このように上記空
間１内において可燃性ガス流体Ｇの漏洩場所を検
知した後、その漏洩場所に近接する開閉扉７を作
動させて一定空間内を遮断する。開閉扉７によつ
て空間１を遮断すると同時に換気フアン９を停止
すると共に第２図Ｂに示す如く漏洩する可燃性ガ
ス（流体）層G1の両側に不活性ガスＮを供給す
る。特に、空間１内に沿つて適宜間隔に配設され
た噴出ノズル５，５から上記漏洩可燃性ガス層
G1の両側部に不活性ガスＮを噴出し、不活性ガ
ス層N1を形成し不燃層乃至遮断層を形成する。
このように不活性ガス層N1によつて可燃性ガス
層G1を挾み、空間１内の空気から遮断する。 Therefore, to describe this method according to FIG. 2, first, as shown in FIG. In this case, the leak detector 3 detects the leak and its location.
Therefore, as described above, a plurality of detectors 3 are provided within the space 1 at appropriate intervals along the space. The leak detector 3 is formed of a thermometer, a gas detector, etc., and is configured to calculate and detect leaks and their positions. After detecting the leakage location of the combustible gas fluid G in the space 1 in this way, the opening/closing door 7 close to the leakage location is operated to shut off the inside of the certain space. The space 1 is shut off by the opening/closing door 7, the ventilation fan 9 is stopped, and an inert gas N is supplied to both sides of the leaking flammable gas (fluid) layer G1 as shown in FIG. 2B. In particular, the flammable gas layer leaks from the jet nozzles 5, 5 arranged at appropriate intervals along the space 1.
Inert gas N is ejected to both sides of G 1 to form an inert gas layer N 1 to form a nonflammable layer or a barrier layer.
In this way, the combustible gas layer G 1 is sandwiched between the inert gas layer N 1 and isolated from the air in the space 1 .
尚、上記噴出ノズル５に設けられた開閉弁６は
電磁弁等が用いられ、漏洩ガス検知器３によつて
漏洩ガスを検出すると同時にリレー回路等を介し
て任意位置の開閉弁６が開放されて不活性ガスを
噴出し、可燃性ガス層G1の両側に供給し、不活
性ガス層N1を形成する。 The on-off valve 6 provided in the jet nozzle 5 is a solenoid valve or the like, and the on-off valve 6 at an arbitrary position is opened via a relay circuit or the like at the same time as the leak gas detector 3 detects leaked gas. Inert gas is ejected and supplied to both sides of the combustible gas layer G1 to form an inert gas layer N1 .
漏洩可燃性ガスG1は不活性ガス層N1即ち不燃
層によりサンドイツチされた状態に維持されつ
つ、第２図Ｃ，Ｄに示すようにピストンフロにて
トンネル、洞道の如き空間１の開放端乃至換気口
８から外部へ排出される。 The leaked combustible gas G1 is maintained in a sandwiched state by an inert gas layer N1 , that is, a noncombustible layer, and is opened in a space 1 such as a tunnel or a cave in a piston flow, as shown in Fig. 2C and D. It is discharged to the outside from the end or the ventilation opening 8.
このように不活性ガス層N1によりサンドイツ
チした状態を維持しつつピストンフロにて可燃性
ガス層G1を外部へ排出し、輸送配管２の開閉弁
を閉塞する等の漏洩に対する処置を実施する。 In this way, while maintaining the sandwiched state with the inert gas layer N 1 , the flammable gas layer G 1 is discharged to the outside by the piston flow, and measures are taken to prevent leakage, such as closing the on-off valve of the transportation pipe 2. .
空間１内に可燃性ガスの漏洩が無くなつたなら
ば空間１内を作業出来る雰囲気にするように可燃
性ガスをパージした後漏洩した輸送配管２の欠陥
個所を補修し、復旧を実施する。 Once there is no longer any leakage of flammable gas in the space 1, the flammable gas is purged to create an atmosphere in which work can be done in the space 1, and then the defective part of the leaked transport pipe 2 is repaired and restoration is carried out.
以上要するに本発明によれば次の如き優れた効
果を発揮する。 In summary, the present invention exhibits the following excellent effects.
(1) 平常時はトンネル、洞道等の空間内は大気中
と同じ状態にあり、酸欠、メンテナンス等に一
切問題を起さない。(1) Under normal conditions, the conditions inside spaces such as tunnels and caves are the same as in the atmosphere, and there are no problems with oxygen deficiency or maintenance.
(2) 不活性ガス層はある所定の長さの不燃層を形
成するためのガス量があれば充分であり、細長
い密閉空間の全長に亘つて不燃層化することが
なく、従来の如き空間の全長に亘つて常時不活
性ガス雰囲気を滞留させる方法と比べて使用さ
れる不活性ガス量を少なくすることができる。(2) The amount of inert gas required to form a noncombustible layer of a certain predetermined length is sufficient, and the noncombustible layer does not form over the entire length of a long and narrow closed space, making it possible to create The amount of inert gas used can be reduced compared to a method in which an inert gas atmosphere is constantly retained over the entire length of the inert gas.
(3) 漏洩位置及び量に応じて、不活性ガスによる
不燃層を一定の長さに定めれば可燃性ガスを外
部に排出するまでの間空気と完全に遮断するこ
とができ、極めて安全に除去することができ
る。(3) If a non-combustible layer made of inert gas is set to a certain length depending on the location and amount of the leak, it will be possible to completely isolate the flammable gas from the air until it is discharged to the outside, making it extremely safe. Can be removed.
(4) 可燃性ガスの漏洩乃至流出量の多寡に拘らず
不活性ガスによるサンドイツチ状態が形成する
ことができる。(4) A sanderch state due to inert gas can be formed regardless of the amount of leakage or outflow of flammable gas.
(5) 平常時は空間内が大気中と同じ状態に保持す
ることができる。(5) During normal times, the inside of the space can be maintained in the same state as the atmosphere.
第１図は本発明の方法を実施するための具体的
装置を示す概略断面図、第２図は本発明の方法を
説明するための概略工程図である。
図中、１はトンネル、洞道等の比較的細長い空
間、２は可燃性流体輸送配管、３は可燃性ガスの
漏洩検知器、４は不活性ガス供給管、５は噴出ノ
ズル、６は開閉弁、７は開閉扉である。
FIG. 1 is a schematic sectional view showing a specific apparatus for carrying out the method of the present invention, and FIG. 2 is a schematic process diagram for explaining the method of the present invention. In the figure, 1 is a relatively long and narrow space such as a tunnel or cave, 2 is a flammable fluid transport pipe, 3 is a flammable gas leak detector, 4 is an inert gas supply pipe, 5 is a jet nozzle, and 6 is an opening/closing unit. Valve 7 is an opening/closing door.
Claims (1)
た可燃性ガスを除去するに、上記空間内に生じた
可燃性ガス層の両側に、不活性ガスによる不燃層
を形成して上記可燃性ガス層を挾み、可燃性ガス
層を上記空間からピストンフロして、排出するよ
うにしたことを特徴とする比較的細長い空間内に
生じた可燃性ガスの除去方法。1. To remove flammable gas generated in a relatively long and narrow space such as a tunnel, a non-combustible layer of inert gas is formed on both sides of the flammable gas layer generated in the space to remove the flammable gas. A method for removing combustible gas generated in a relatively long and narrow space, characterized by sandwiching the layers and piston-flowing the combustible gas layer from the space to discharge it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2716181A JPS57143100A (en) | 1981-02-26 | 1981-02-26 | Removal of combustible gas generated in relatively long space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2716181A JPS57143100A (en) | 1981-02-26 | 1981-02-26 | Removal of combustible gas generated in relatively long space |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143100A JPS57143100A (en) | 1982-09-04 |
| JPS6160960B2 true JPS6160960B2 (en) | 1986-12-23 |
Family
ID=12213325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2716181A Granted JPS57143100A (en) | 1981-02-26 | 1981-02-26 | Removal of combustible gas generated in relatively long space |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143100A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0411053U (en) * | 1990-05-16 | 1992-01-29 |
-
1981
- 1981-02-26 JP JP2716181A patent/JPS57143100A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0411053U (en) * | 1990-05-16 | 1992-01-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143100A (en) | 1982-09-04 |
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