JP3852069B2 - Water spray head - Google Patents

Water spray head Download PDF

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Publication number
JP3852069B2
JP3852069B2 JP27805299A JP27805299A JP3852069B2 JP 3852069 B2 JP3852069 B2 JP 3852069B2 JP 27805299 A JP27805299 A JP 27805299A JP 27805299 A JP27805299 A JP 27805299A JP 3852069 B2 JP3852069 B2 JP 3852069B2
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JP
Japan
Prior art keywords
water
water spray
throw nozzle
spray head
extinguishing
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 - Fee Related
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JP27805299A
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Japanese (ja)
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JP2001095935A (en
Inventor
智宏 高比良
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Nohmi Bosai Ltd
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Nohmi Bosai Ltd
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Filing date
Publication date
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Priority to JP27805299A priority Critical patent/JP3852069B2/en
Publication of JP2001095935A publication Critical patent/JP2001095935A/en
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Publication of JP3852069B2 publication Critical patent/JP3852069B2/en
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  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Nozzles (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、トンネル等に配設される水噴霧ヘッドに関するものである。
【0002】
【従来の技術】
トンネル内の壁面上部には、水噴霧ヘッドが配設されている。この水噴霧ヘッドは近投ノズルと遠投ノズルとを備えており、両ノズルからの水噴霧により方形状の散水分布を得ている。
【0003】
【発明が解決しようとする課題】
トンネルの壁面上部に電気機器等のためのケーブルラックが突設されているときに、この水噴霧ヘッドは、このケーブルラックの影響を受けない様に低い位置に配設しなければならない。そのため、水噴霧ヘッドを設計位置に配設することが出来なくなり、方形状且つ立体的なの防護範囲に無駄なく散水するための、立方体状の散水分布が得られないことがある。
【0004】
特に、遠投ノズルを設計位置より低い位置に配設すると、該ノズルから放出される消火用水の飛距離が短くなり、設計散水分布の先端まで届きにくくなるとともに、特に防護範囲の上方の水噴霧ヘッドに対向する辺の部分に散水しにくくなる。そのため、防護範囲全域にわたり散水することは困難となる。
【0005】
この発明は、上記事情に鑑み、確実に防護範囲を覆える立体的な方形状の散水分布を得ることを目的とする。
【0006】
【課題を解決するための手段】
この発明は、本体に放射角度が異なる近投ノズルと遠投ノズルとを設け、該遠投ノズルの開口の正面に、該遠投ノズルに支持アームによって基端側が固定されたデフレクタを配設した水噴霧ヘッドにおいて;
前記デフレクタは、消火用水を衝突させて分散させるV字状の反射面を有するV字状反射板と、該V字状反射板の側縁に連続し、且つ、該反射面方向に傾斜して、該V字状反射板により分散された消火用水の横方向への拡がりを規制する抑え面を有する傾斜抑え板とを備えており、前記V字状反射板の反射面が、消火用水の放出方向であるところの、該支持アームが連結されている基端から先端に向かって幅が広くなることを特徴とする水噴霧ヘッド、である。
【0007】
この発明は、本体に放射角度が異なる近投ノズルと遠投ノズルとを設け、該遠投ノズルの開口の正面に、該遠投ノズルに支持アームによって基端側が固定されたデフレクタを配設した水噴霧ヘッドにおいて;
前記デフレクタは、消火用水を衝突させて分散させるV字状の反射面を有するV字状反射板と、該V字状反射板の側縁に連続し、且つ、該反射面方向に傾斜して、該V字状反射板により分散された消火用水の横方向への拡がりを規制する抑え面を有する傾斜抑え板とを備えており、前記傾斜抑え板の抑え面が、消火用水の放出方向であるところの、該支持アームが連結されている基端から先端に向かって幅が狭くなることを特徴とする水噴霧ヘッド、である。
【0008】
【発明の実施の形態】
本発明者は、設計通りの方形状の散水分布を得るにはどのようにしたら良いかを研究し、実験を重ねた。
その結果、本体のノズル開口の正面に配設されるデフレクタは、その放出方向に対して垂直なノズル方向への断面形状が略W字形状であれば良いことがわかった。
【0009】
また、前記W字形状のデフレクタの傾斜抑え板を、基端から先端に向かって幅を狭くすると、消火用水の横方向への拡がりを適正に規制することができ、また、デフレクタのV字状反射板の中心角を、散水分布の先端揃え角度、例えば、135度、にすると散水分布の先端が同一直線上に揃い方形状の散水分布の先端の一部が飛び出ることもない。
【0010】
【実施例】
この発明の実施例を図1〜図7により説明する。
トンネルTnの壁面1上部には、ケーブルラック2が突出して設けられ、その下部に水噴霧ヘッド3が設けられている。
なお、図7は上側をトンネルTnの断面図及び水噴霧ヘッド3からのトンネル断面に対する散水形状に、下側をトンネルTn路面19への散水分布の右半分を示したものであり、左半分は右と同形状となるので省略している。
【0011】
この水噴霧ヘッド3は、図示しない給水管に接続された本体6と、該本体6に螺着された近投ノズル4及び遠投ノズル5とを備えている。
この両ノズル4、5の中心軸4c、5cは垂線Vに対して互いに異なった角度α、βで傾斜している。この傾斜角度は必要に応じて適宜選択されるが、例えば、角度αは20度、角度βは160度が、採用される。
【0012】
近投ノズル4には、スパイラル7が内蔵され、その先端には防塵キャップ8が設けられている。この防塵キャップ8は放水により自動的に吹き飛ばされる。
【0013】
遠投ノズルの先端部には、デフレクタ10が設けられている。デフレクタ10の支持アーム11は、押えナット12によりノズル5に固定され、該デフレクタ10は、ノズル開口5aの正面と間隔をおいて対向している。
【0014】
デフレクタ10は、消火用水を衝突させて分散させるV字状の反射面を有するV字状反射板15と、該V字状反射板15の側縁15aに連続し、且つ、該反射面方向に傾斜して、該V字状反射板により分散された消火用水の横方向への拡がりを規制する抑え面を有する傾斜抑え板16と、を備えている。このデフレクタ10の平面図を示す図5のIX-IX線断面形状、即ち、デフレクタ10の放出方向A10に対して垂直なノズル方向への断面形状、は略W字形に形成されている。
【0015】
V字状反射板15は、消火用水の放出方向A10、即ち、支持アーム11が連結されている基端15bから先端15cに向かって幅が広くなっており、又、その中心角θは、散水分布先端揃え角、即ち、散水分布18の先端18aが略同一直線上に揃い、その一部が飛び出ない様に散水できる角度、に形成されている。この揃え角θは、ノズル5からの噴出圧力等を考慮して適宜選択されるが、例えば、揃え角θとして135゜が採用される。
【0016】
傾斜抑え板16は、消火用水の放出方向A10、即ち、支持アーム11が連結されている基端16bから先端16cに向かって幅が狭くなっており、又、該V字状反射板15に対し、傾斜角γ傾いている。この傾斜角γは、散水分布の幅方向の広がりを考慮して適宜選択されるが、例えば、傾斜角γとして130゜が採用される。なお、14は、防塵キャップであるが、このキャップ14は放水により自動的に吹き飛ばされる。
【0017】
次に、本実施例の作動について説明する。
火災発生時に、消火用水Wを本体6に圧送すると、該消火用水Wは近投ノズル4と遠投ノズル5とから同時に放水され、路面19に落下する。
そのため、トンネルTn内の路面19には、所定形状の散水分布領域、例えば、横9m、縦5mの方形状の散水分布18が形成され、高さ約4,5mの立体的な防護範囲20は、霧化された消火用水に完全に覆われる。
なお、防塵キャップ8、14は、ノズル4、5から噴出される消火用水により吹き飛ばされる。
【0018】
この時、近投ノズル4から放出される消火用水Wは、該水噴霧ヘッド3側に散水し、前記方形状の散水分布18の約2/3にわたり散水される。
【0019】
遠投ノズル5から放出される消火用水Wは、デフレクタ10のV字状反射板15の反射面15n中央に衝突し分散される。この衝突した消火用水Wのうち放出方向A10に分散された消火用水W1は、反射面15nに沿って上昇しながら該ノズル5と対向する壁面1に向かって飛散し、前記方形状の散水分布18の残りの範囲、即ち、該散水分布18の先端側約1/3に散水される。
【0020】
この時、V字状反射板15の中心角θが、散水分布先端揃え角に形成されているので、散水分布の先端18aが、略同一直線上に揃い、その一部が飛び出ることはない。そのため、消火用水の無駄使いを防止することができる。
【0021】
前記衝突した消火用水Wのうち、放出方向A10と直交する方向に分散された消火用水W2は、傾斜抑え板16の抑え面16nにより移動方向を規制されるので、前記直交する方向(横方向)への余分な拡がりを抑えることができる。
【0022】
この時、傾斜抑え板16の幅が基端16bから先端16cに向かって狭くなっているので、先端16c側に比べ水勢の強い基端側において、消火用水W2はより大きな規制を受けることになる。そのため、消火用水の基端16c側での不必要な横方向への拡がりを防止できる。
【0023】
【発明の効果】
この発明は、次の様な顕著な効果を奏する。
(1)デフレクタは、その放出方向に対して垂直なノズル方向への断面形状が略W字形であるので、方形状の散水分布を得ることができる。
【0024】
(2)デフレクタのV字状反射板の中心角を、散水分布先端揃え角に形成したので、散水分布の先端が略同一直線上に揃い、その一部が飛び出すことはない。そのため、必要最小限の消火用水で方形状の散水分布を得ることができる。
【0025】
(3)デフレクタの傾斜抑え板の幅を、基端から先端に向かって狭くしたので、水勢の強い基端側がその先端側より大きく規制される。そのため、横方向への余分な消火用水の拡がりを防止できる。
【図面の簡単な説明】
【図1】本発明の実施例を示す側面図である。
【図2】同正面図である。
【図3】図5のIII−III線断面図である。
【図4】図5のIV−IV線断面図である。
【図5】同平面図である。
【図6】水噴霧ヘッド全体を示す縦断面図である。
【図7】水噴霧ヘッドをトンネル内に取付けた状態を示すトンネルの断面図であり、かつ、水噴霧ヘッドからの散水形状及び路面への散水分布を示す図である。
【符号の説明】
3 水噴霧ヘッド
5 遠投ノズル
6 本体
15 V字状反射板
16 傾斜抑え板
18 方形状の散水分布
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water spray head disposed in a tunnel or the like.
[0002]
[Prior art]
A water spray head is disposed on the upper wall surface in the tunnel. This water spray head includes a near throw nozzle and a long throw nozzle, and obtains a square water spray distribution by spraying water from both nozzles.
[0003]
[Problems to be solved by the invention]
When a cable rack for electric equipment or the like is projected on the upper wall surface of the tunnel, the water spray head must be disposed at a low position so as not to be affected by the cable rack. For this reason, the water spray head cannot be disposed at the design position, and there may be a case where a cubic water spray distribution for spraying water without waste in the rectangular and three-dimensional protection range may not be obtained.
[0004]
In particular, if the long-throw nozzle is arranged at a position lower than the design position, the distance of fire-fighting water discharged from the nozzle is shortened, making it difficult to reach the tip of the design sprinkling distribution, and water spray especially above the protection range. It becomes difficult to spray water on the part of the side facing the head. Therefore, it is difficult to spray water over the entire protection range.
[0005]
In view of the above circumstances, an object of the present invention is to obtain a three-dimensional square water spray distribution that can reliably cover the protection range.
[0006]
[Means for Solving the Problems]
In this invention, a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle . In the water spray head;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate , and is inclined toward the reflecting surface. And an inclination restraining plate having a restraining surface that restricts the spread of the fire-extinguishing water dispersed by the V-shaped reflecting plate in the lateral direction, and the reflecting surface of the V-shaped reflecting plate releases the fire-extinguishing water. The water spray head is characterized in that the width becomes wider from the proximal end to the distal end where the support arm is connected .
[0007]
In this invention, a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle. In the water spray head;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate , and is inclined toward the reflecting surface. comprises an inclined retainer plate having clamping surfaces for restricting the spread in the lateral direction of the fire extinguishing water dispersed by the V-shaped reflection plate, clamping surfaces of the inclined holding plate is, in the direction of emission of the fire extinguishing water A water spray head characterized in that the width becomes narrower from the proximal end to which the support arm is connected toward the distal end .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor studied and repeated experiments on how to obtain a square water spray distribution as designed.
As a result, it was found that the deflector disposed in front of the nozzle opening of the main body only needs to have a substantially W-shaped cross section in the nozzle direction perpendicular to the discharge direction.
[0009]
Further, if the width of the W-shaped deflector inclination-reducing plate is narrowed from the base end to the tip end, it is possible to properly regulate the spreading of the water for extinguishing water in the lateral direction, and the V-shape of the deflector. If the center angle of the reflector is set to the tip alignment angle of the sprinkling distribution, for example, 135 degrees, the tip of the sprinkling distribution is aligned on the same straight line, and a part of the tip of the water spray distribution having a rectangular shape does not jump out.
[0010]
【Example】
An embodiment of the present invention will be described with reference to FIGS.
A cable rack 2 protrudes from the upper part of the wall surface 1 of the tunnel Tn, and a water spray head 3 is provided below the cable rack 2.
In addition, FIG. 7 shows the right half of the water spray distribution on the tunnel Tn road surface 19 on the upper side in the cross section of the tunnel Tn and the water spray shape with respect to the tunnel cross section from the water spray head 3 on the upper side, Since it is the same shape as the right, it is omitted.
[0011]
The water spray head 3 includes a main body 6 connected to a water supply pipe (not shown), and a near throw nozzle 4 and a far throw nozzle 5 screwed to the main body 6.
The central axes 4c and 5c of the nozzles 4 and 5 are inclined at different angles α and β with respect to the perpendicular V. The inclination angle is appropriately selected as necessary. For example, the angle α is 20 degrees and the angle β is 160 degrees.
[0012]
The near throw nozzle 4 has a built-in spiral 7, and a dustproof cap 8 is provided at the tip thereof. The dust cap 8 is automatically blown away by water discharge.
[0013]
A deflector 10 is provided at the tip of the long throw nozzle. The support arm 11 of the deflector 10 is fixed to the nozzle 5 by a presser nut 12, and the deflector 10 is opposed to the front surface of the nozzle opening 5a with a gap.
[0014]
The deflector 10 is continuous with the V-shaped reflecting plate 15 having a V-shaped reflecting surface that collides and disperses water for extinguishing , and the side edge 15a of the V-shaped reflecting plate 15 , and in the direction of the reflecting surface. inclined to, and includes an inclined holding plate 16 to have a restraining surface for restricting the spread in the lateral direction of the dispersed extinguishing water, the by the V-shaped reflection plate. A sectional view taken along line IX-IX in FIG. 5 showing a plan view of the deflector 10, that is, a sectional shape in the nozzle direction perpendicular to the discharge direction A10 of the deflector 10, is formed in a substantially W shape.
[0015]
The V-shaped reflector 15 is wide in the discharge direction A10 of fire-extinguishing water, that is, from the base end 15b to which the support arm 11 is connected to the tip 15c, and the central angle θ is a water spray. The distribution tip alignment angle, that is, the angle at which the tip 18a of the sprinkling distribution 18 is aligned on substantially the same straight line and can be sprinkled so that a part thereof does not jump out. The alignment angle θ is appropriately selected in consideration of the ejection pressure from the nozzle 5 and the like. For example, 135 ° is adopted as the alignment angle θ.
[0016]
The inclination restraining plate 16 is narrower in the discharge direction A10 of the fire-extinguishing water, that is, from the base end 16b to which the support arm 11 is connected to the front end 16c, and with respect to the V-shaped reflector 15 The inclination angle γ is inclined. The inclination angle γ is appropriately selected in consideration of the spread in the width direction of the sprinkling distribution. For example, 130 ° is adopted as the inclination angle γ. In addition, although 14 is a dustproof cap, this cap 14 is automatically blown away by water discharge.
[0017]
Next, the operation of this embodiment will be described.
When fire extinguishing water W is pumped to the main body 6 at the time of a fire, the fire extinguishing water W is simultaneously discharged from the near throw nozzle 4 and the far throw nozzle 5 and falls onto the road surface 19.
Therefore, on the road surface 19 in the tunnel Tn, a water spray distribution area having a predetermined shape, for example, a water spray distribution 18 having a horizontal shape of 9 m and a height of 5 m is formed, and a three-dimensional protection range 20 having a height of about 4 and 5 m is formed. Fully covered with atomized fire-fighting water.
The dust caps 8 and 14 are blown off by fire-fighting water ejected from the nozzles 4 and 5.
[0018]
At this time, the fire-extinguishing water W discharged from the near throw nozzle 4 is sprinkled on the water spray head 3 side, and is sprayed over about 2/3 of the rectangular water spray distribution 18.
[0019]
The fire-extinguishing water W discharged from the long throw nozzle 5 collides with the center of the reflecting surface 15n of the V-shaped reflecting plate 15 of the deflector 10 and is dispersed. The fire-extinguishing water W 1 dispersed in the discharge direction A10 out of the fire-extinguishing water W collided is scattered along the reflecting surface 15n and scattered toward the wall surface 1 facing the nozzle 5, and the rectangular water spray distribution. Water is sprayed in the remaining 18 regions, that is, about 1/3 of the tip side of the water spray distribution 18.
[0020]
At this time, since the central angle θ of the V-shaped reflector 15 is formed at the sprinkling distribution front end alignment angle, the front end 18a of the sprinkling distribution is aligned substantially on the same straight line, and a part thereof does not jump out. Therefore, wasteful use of fire-fighting water can be prevented.
[0021]
Among the fire-extinguishing water W that has collided, the fire-extinguishing water W 2 dispersed in the direction orthogonal to the discharge direction A10 is restricted in its moving direction by the restraining surface 16n of the tilt restraining plate 16, so the orthogonal direction (lateral direction) ) Can be suppressed.
[0022]
At this time, since the width of the inclined holding plate 16 is narrower toward the proximal end 16b to the tip 16c, the strong base end side of water force compared to the tip 16c side, extinguishing water W 2 to be subject to greater restriction Become. Therefore, unnecessary spread in the lateral direction on the base end 16c side of the fire-extinguishing water can be prevented.
[0023]
【The invention's effect】
The present invention has the following remarkable effects.
(1) Since the deflector has a substantially W-shaped cross section in the nozzle direction perpendicular to the discharge direction, a square water spray distribution can be obtained.
[0024]
(2) Since the center angle of the V-shaped reflector of the deflector is formed at the sprinkling distribution tip alignment angle, the tip of the sprinkling distribution is aligned on substantially the same straight line, and part of it does not jump out. Therefore, a square water spray distribution can be obtained with the minimum necessary water for fire extinguishing.
[0025]
(3) Since the width of the deflector inclination restraining plate is narrowed from the proximal end toward the distal end, the proximal end side having a strong water flow is restricted more than the distal end side. Therefore, it is possible to prevent the spread of excess fire-fighting water in the lateral direction.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a front view of the same.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a plan view of the same.
FIG. 6 is a longitudinal sectional view showing the entire water spray head.
FIG. 7 is a cross-sectional view of the tunnel showing a state in which the water spray head is mounted in the tunnel, and is a view showing the water spray shape from the water spray head and the water spray distribution on the road surface.
[Explanation of symbols]
3 Water spray head 5 Long throw nozzle 6 Main body 15 V-shaped reflector 16 Inclination restraint plate 18 Rectangular water spray distribution

Claims (2)

本体に放射角度が異なる近投ノズルと遠投ノズルとを設け、該遠投ノズルの開口の正面に、該遠投ノズルに支持アームによって基端側が固定されたデフレクタを配設した水噴霧ヘッドにおいて;
前記デフレクタは、消火用水を衝突させて分散させるV字状の反射面を有するV字状反射板と、該V字状反射板の側縁に連続し、且つ、該反射面方向に傾斜して、該V字状反射板により分散された消火用水の横方向への拡がりを規制する抑え面を有する傾斜抑え板とを備えており、
前記V字状反射板の反射面が、消火用水の放出方向であるところの、該支持アームが連結されている基端から先端に向かって幅が広くなることを特徴とする水噴霧ヘッド。
A water spray head in which a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle . ;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate, and is inclined toward the reflecting surface. And an inclination restraining plate having a restraining surface that regulates the lateral expansion of the fire-extinguishing water dispersed by the V-shaped reflector ,
A water spray head characterized in that the reflection surface of the V-shaped reflector is in the discharge direction of fire-extinguishing water , and the width becomes wider from the proximal end to which the support arm is connected toward the distal end .
本体に放射角度が異なる近投ノズルと遠投ノズルとを設け、該遠投ノズルの開口の正面に、該遠投ノズルに支持アームによって基端側が固定されたデフレクタを配設した水噴霧ヘッドにおいて;
前記デフレクタは、消火用水を衝突させて分散させるV字状の反射面を有するV字状反射板と、
該V字状反射板の側縁に連続し、且つ、該反射面方向に傾斜して、該V字状反射板により分散された消火用水の横方向への拡がりを規制する抑え面を有する傾斜抑え板とを備えており、
前記傾斜抑え板の抑え面が、消火用水の放出方向であるところの、該支持アームが連結されている基端から先端に向かって幅が狭くなることを特徴とする水噴霧ヘッド。
A water spray head in which a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle. ;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses fire-extinguishing water, and
An inclination having a restraining surface that is continuous with the side edge of the V-shaped reflector and is inclined in the direction of the reflecting surface to restrict the spread of the water for fire extinguishing dispersed by the V-shaped reflecting plate in the lateral direction. With a holding plate ,
The clamping surfaces of the inclined holding plate is, where an emission direction of the extinguishing water, the water spray head is characterized in that the width toward the tip from the base end of the support arm is connected is narrowed.
JP27805299A 1999-09-30 1999-09-30 Water spray head Expired - Fee Related JP3852069B2 (en)

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