JPH01275900A - Ventilation fan for tunnel - Google Patents
Ventilation fan for tunnelInfo
- Publication number
- JPH01275900A JPH01275900A JP10210388A JP10210388A JPH01275900A JP H01275900 A JPH01275900 A JP H01275900A JP 10210388 A JP10210388 A JP 10210388A JP 10210388 A JP10210388 A JP 10210388A JP H01275900 A JPH01275900 A JP H01275900A
- Authority
- JP
- Japan
- Prior art keywords
- jet
- tunnel
- wall surface
- fan
- ventilation fan
- 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
- 238000009423 ventilation Methods 0.000 title claims abstract description 26
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009792 diffusion process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はトンネル内に設置されるトンネル用換気ファン
に関する０
従来の技術
一般ｒ道路トンネル内には換気のために換気ファンが設
備される０この換気ファンとしては通常ジェットファン
が用いられ、風速２０〜３０ ｒｎ／Ｓで空気を吸排し
、その噴出流が拡散してトンネル内の空気全体を動かす
推力を発生し、この結果、トンネルの坑口の一方から新
鮮空気が取り込まれ、他方の坑口からは坑内空気が排出
されて所期の換気が行なわれる。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a ventilation fan for a tunnel installed in a tunnel.PRIOR ART Generally, a ventilation fan is installed in a road tunnel for ventilation. A jet fan is usually used as a fan, and it sucks and exhausts air at a wind speed of 20 to 30 rn/s, and its jet stream diffuses to generate thrust that moves the entire air inside the tunnel.As a result, one side of the tunnel entrance is Fresh air is taken in from the other wellhead, and underground air is exhausted from the other wellhead to provide the desired ventilation.
従来のトンネル用の換気ファンは第３図に示すように両
端が開口した円筒状のファンケーシング１内にモータ２
およびインペラー３を装備した構成で、噴流を軸にそっ
て前方に吹き出す形となっている。そして第４図に示す
ようにトンネル４内における建築限界６の外、すなわち
天井部に据付けられていた。As shown in Figure 3, a conventional ventilation fan for tunnels has a motor 2 housed inside a cylindrical fan casing 1 with both ends open.
It is equipped with an impeller 3, which blows the jet forward along the axis. As shown in FIG. 4, it was installed outside the construction limit 6 in the tunnel 4, that is, on the ceiling.
発明が解決しようとする課題
ところで上記のような換気ファンおよびその据付構成に
よれば、つぎのような問題がある０すなわち、換気ファ
ンより噴出される高速噴流は、いわゆるコアンダ効果に
より、第６図の破線Ａ、Ａ’で示すようにトンネル壁面
６に沿った流路をと９、このことによってトンネル壁面
６と接触し、換気ファンの空気動力の１０〜６０チに達
する大きな噴流摩擦損失を発生し、換気効率を低下させ
ていたＯ
また、トンネル内には上流側の換気ファンの噴流が完全
に拡散される距離をおいて次の下流側の換気ファンを設
置しないと効率が低下する。この距離は一般に１００〜
２００ｆｌとされている。従来の換気ファンではコアン
ダ効果によシ噴流の拡散距離が長く、換気ファンの増設
に制約があり、配線長が長くなることから電線による電
圧降下による損失が大きく、また、電源供給点である坑
口近くにジェットファンを配置できにくいものであった
Ｏ
本発明は前記従来の問題に留意し、噴流とトンネル壁面
の摩擦を小さくして効率的な換気ができるようにすると
ともに、噴流の拡散距離を短かくして、増設が容易なト
ンネル用換気ファンを提供することを目的とするもので
ある。Problems to be Solved by the Invention However, according to the ventilation fan and its installation configuration as described above, there are the following problems. In other words, the high-speed jet ejected from the ventilation fan is caused by the so-called Coanda effect, as shown in FIG. As shown by dashed lines A and A', the flow path along the tunnel wall 6 is created by contacting the tunnel wall 6, resulting in a large jet friction loss reaching 10 to 60 inches of the air power of the ventilation fan. However, ventilation efficiency was reduced.In addition, unless the next downstream ventilation fan is installed within the tunnel at a distance that allows the jet flow from the upstream ventilation fan to be completely dispersed, the efficiency will decrease. This distance is generally 100~
It is said to be 200fl. With conventional ventilation fans, the jet flow spreads over a long distance due to the Coanda effect, which limits the ability to add more ventilation fans.The long wiring length causes large losses due to voltage drop due to wires, and the power supply point at the wellhead It was difficult to place a jet fan nearby.The present invention takes into account the above-mentioned conventional problems, reduces the friction between the jet flow and the tunnel wall surface, enables efficient ventilation, and reduces the diffusion distance of the jet flow. The purpose of this invention is to provide a tunnel ventilation fan that is short and easy to expand.
課題を解決するための手段
前記目的を達成するため、本発明のトンネル用換気ファ
ンは、ケーシングの噴流吐出口におけるトンネル壁面と
反対側の部分に、先端にいくにしたがってトンネル壁面
よＣＭれるように傾斜した偏向用フラップを設けた構成
としたものである０作 用
上記構成のトンネル用換気ファンによる噴流は、コアン
ダ効果によって偏向用フラップに沿って流れ、すなわち
トンネル壁面との接触を小としてトンネル壁面との摩擦
を小さくし、摩擦損失を軽減する。また、噴流の拡散距
離が短かくなることとなる〇
実施例
以下本発明の一実施例を第１図および第２図にもとづき
説明する。Means for Solving the Problems In order to achieve the above-mentioned object, the tunnel ventilation fan of the present invention is provided with a ventilating fan for a tunnel in which a part of the jet outlet of the casing on the opposite side from the tunnel wall surface is arranged so that it is CM closer to the tunnel wall surface as it goes toward the tip. The jet flow generated by the tunnel ventilation fan having the above configuration flows along the deflection flaps due to the Coanda effect, that is, the jet flow flows along the deflection flaps with small contact with the tunnel wall surface. Reduces friction with the material and reduces friction loss. Further, the diffusion distance of the jet stream is shortened. Embodiment 1 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
図において７はジェットファンのファンケーシング、８
はセータ、９はインペラーであり、これらは前述の従来
のものと同様に構成されている。In the figure, 7 is the fan casing of the jet fan, 8
9 is a theta, and 9 is an impeller, which are constructed in the same manner as the conventional one described above.
本実施例の特徴的構成は、前記ファンケーシング７の噴
出口における反トンネル壁面側に偏向用フラップ１０を
設けたことにある。この偏向用フラップ１ｏは表面が滑
らかで、噴流の流れ方向の長さが数１０Ｃ１１程度の短
かいものとしている。そして支持腕１１により角度調整
自在に支持され、先端にいくほどトンネル壁面より離れ
るように傾斜しておシ、その角度は５〜２０’に選ばれ
ているＯ上記構成のジェットファンは、噴流を偏向用フ
ラップにおけるコアンダ効果により、トンネル壁面から
遠い側へ偏向できる０すなわち、第６図の点線Ｃ，Ｄの
ような噴流の流れとなる。前記噴流トンネル壁面との摩
擦が小さく、その損失が小さいものであり、また、小さ
な、そして滑らかな偏向用フラップによる摩擦損失が小
さい。したがって、ジェットファンの昇圧効率（トンネ
ル空気に与える推力／）１ンの空気動力）を１０〜ｔｓ
ｏｃ４も向上させることができる〇
また、偏向用フラップ°はトンネルの建築限界を才さな
いので、ジェットファンの設置に支障はない。さらに、
噴流の拡散が極めて速やかであり、各ジェットファン間
の距離を短かくできるから、ジェットファンの増設を可
能にし、電源供給点である坑口近くに配置でき°、配線
費の節減や、電線の電圧降下による損失も軽減できる〇
なお、前記実施例ではジェットファンとしたが、本発明
はブースタフ１ンにも適用できるものであり、本発明は
ジェットファンに限られるものではない◎
発明の効果
前記実施例の説明より明らかなように、本発明は換気フ
ァンの噴出口に偏向板を設けて噴流をトンネル壁面と離
れる方向に偏向させるように構成したため、トンネル壁
面での噴流の摩擦損失が小さく、効果的な換気ができる
。また、噴流の拡散距離を短かくしてトンネル内に換気
ファンの増設を可能にするものであり、その価値の大き
いものである。A characteristic feature of this embodiment is that a deflection flap 10 is provided on the side opposite to the tunnel wall surface of the jet outlet of the fan casing 7. This deflection flap 1o has a smooth surface and a short length of about 10C11 in the direction of flow of the jet stream. The support arm 11 supports the support arm 11 so that the angle can be adjusted freely, and the fan tilts away from the tunnel wall toward the tip, and the angle is selected from 5 to 20'. Due to the Coanda effect in the deflection flap, the jet flow becomes 0, which can be deflected toward the side far from the tunnel wall surface, that is, as shown by dotted lines C and D in FIG. 6. The friction with the jet tunnel wall surface is small and its loss is small, and the friction loss due to the small and smooth deflection flap is small. Therefore, the boosting efficiency of the jet fan (the thrust given to the tunnel air/1 liter of air power) is 10~ts
OC4 can also be improved. Also, since the deflection flaps do not exceed the construction limits of the tunnel, there is no problem in installing jet fans. moreover,
Since the jet spreads extremely quickly and the distance between each jet fan can be shortened, it is possible to increase the number of jet fans and place them near the mine entrance, which is the power supply point, reducing wiring costs and lowering the voltage of electric wires. Loss due to descent can also be reduced〇In addition, although the jet fan was used in the above embodiment, the present invention can also be applied to a booster tube, and the present invention is not limited to jet fans◎ Effects of the invention The above implementation As is clear from the explanation of the example, the present invention is configured such that a deflection plate is provided at the outlet of the ventilation fan to deflect the jet in a direction away from the tunnel wall, so the friction loss of the jet on the tunnel wall is small and the effect is ventilation. Furthermore, it shortens the diffusion distance of the jet flow, making it possible to install more ventilation fans in the tunnel, which is of great value.
第１図は本発明のトンネル用換気ファンの側面図、第２
図は同正面図、第３図は従来のトンネル用換気ファンの
側面図、第４図は同トンネル用換気ファンの設置を示す
トンネルの説明図、第６図はトンネル内の噴流説明図で
ある。Fig. 1 is a side view of the tunnel ventilation fan of the present invention;
The figure is a front view of the same, Figure 3 is a side view of a conventional ventilation fan for tunnels, Figure 4 is an explanatory diagram of a tunnel showing the installation of the ventilation fan for tunnels, and Figure 6 is an explanatory diagram of jet flow inside the tunnel. .
Claims (1)
先端にいくにしたがってトンネル壁面より離れるように
傾斜した偏向用フラップを設けてなるトンネル用換気フ
ァン。On the side opposite to the tunnel wall at the jet outlet of the casing,
A ventilation fan for tunnels that is equipped with deflection flaps that slope away from the tunnel wall toward the tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10210388A JPH01275900A (en) | 1988-04-25 | 1988-04-25 | Ventilation fan for tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10210388A JPH01275900A (en) | 1988-04-25 | 1988-04-25 | Ventilation fan for tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01275900A true JPH01275900A (en) | 1989-11-06 |
Family
ID=14318459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10210388A Pending JPH01275900A (en) | 1988-04-25 | 1988-04-25 | Ventilation fan for tunnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01275900A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006313A1 (en) * | 1994-08-23 | 1996-02-29 | South Bank University Enterprises Limited | Air moving system |
| EP1050684A2 (en) * | 1999-05-05 | 2000-11-08 | Witt & Sohn AG | Jet fan |
| JP2012506514A (en) * | 2008-10-24 | 2012-03-15 | モセン エルティーディー | Improved tunnel ventilator |
| JP2020519800A (en) * | 2017-05-04 | 2020-07-02 | モーゼン リミテッド | Optimized tunnel ventilation device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130099A (en) * | 1987-11-12 | 1989-05-23 | Fuji Electric Co Ltd | Blower for tunnel ventilation |
-
1988
- 1988-04-25 JP JP10210388A patent/JPH01275900A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130099A (en) * | 1987-11-12 | 1989-05-23 | Fuji Electric Co Ltd | Blower for tunnel ventilation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006313A1 (en) * | 1994-08-23 | 1996-02-29 | South Bank University Enterprises Limited | Air moving system |
| US5722885A (en) * | 1994-08-23 | 1998-03-03 | South Bank University & Enterprises, Limited | Air moving system |
| EP1050684A2 (en) * | 1999-05-05 | 2000-11-08 | Witt & Sohn AG | Jet fan |
| EP1050684A3 (en) * | 1999-05-05 | 2002-03-27 | Witt & Sohn AG | Jet fan |
| JP2012506514A (en) * | 2008-10-24 | 2012-03-15 | モセン エルティーディー | Improved tunnel ventilator |
| JP2020519800A (en) * | 2017-05-04 | 2020-07-02 | モーゼン リミテッド | Optimized tunnel ventilation device |
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