JPH0510831Y2 - - Google Patents
Info
- Publication number
- JPH0510831Y2 JPH0510831Y2 JP1983044240U JP4424083U JPH0510831Y2 JP H0510831 Y2 JPH0510831 Y2 JP H0510831Y2 JP 1983044240 U JP1983044240 U JP 1983044240U JP 4424083 U JP4424083 U JP 4424083U JP H0510831 Y2 JPH0510831 Y2 JP H0510831Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- foam
- contraction
- flow
- case
- 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 - Lifetime
Links
- 239000006260 foam Substances 0.000 claims description 24
- 230000008602 contraction Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Description
【考案の詳細な説明】
この考案は消火用泡ノズルに関するものであ
る。[Detailed description of the invention] This invention relates to a fire extinguishing foam nozzle.
従来、泡消火装置に使用される泡ノズルは、泡
混合液をデフレクタに衝突させ飛散させて発泡さ
せたり、複数個のノズルから泡混合液を放出し空
気と混合させ発泡させるようにしていた。しかし
前者は、泡混合液をデフレクタに衝突させ飛散さ
せるようにしているのでエネルギーロスが多く放
水距離が短かくなり、また構造が複雑高価となつ
た。さらに後者は、複数個のノズルから泡混合液
を放出させているので、流量制御が難しくまたノ
ズル個々の径が小さく目詰りが起りやすく、かつ
構造が複雑で高価となる欠点があつた。 Conventionally, foam nozzles used in foam fire extinguishing systems collide the foam mixture with a deflector to cause it to scatter and form foam, or to discharge the foam mixture from multiple nozzles and mix it with air to form foam. However, in the former method, the foam mixture collides with a deflector and is scattered, resulting in a large amount of energy loss, shortening the water discharge distance, and making the structure complicated and expensive. Furthermore, since the latter method discharges the foam mixture from a plurality of nozzles, it is difficult to control the flow rate, each nozzle has a small diameter and is easily clogged, and the structure is complicated and expensive.
この考案は以上の点にかんがみ構造簡単な安価
な泡ノズルを得ることを目的としたものであつ
て、縮流現象を利用した泡ノズルを提供するもの
である。 In view of the above points, this invention aims to provide an inexpensive foam nozzle with a simple structure, and provides a foam nozzle that utilizes the phenomenon of contraction.
以下第1図および第2図により説明する。図に
おいて、1はノズルで、その左側より加圧された
泡混合液が供給され、2はノズル1に付設された
収斂部、3は空気流入口4を形成するように収斂
部2の先端と連結された管槍である。収斂部2に
は第2図に示すように流管の縮流5が発生し、こ
の縮流5の外周に負圧が発生しその影響を受けて
収斂部2出口より粒子状となつて管槍3へと飛散
されるので、空気流入口4より流入される空気と
良好に混合発泡され管槍3より放出される。図に
はノズル1の入口角度θ′を180°とした場合につい
て説明したが、縮流現象は、この入口角度θが1
点鎖線で示す16°の場合およびそれ以上の360°ま
での間において発生し、θが大となるほどその度
合いが大となり、θが360°で最大に達する。なお
ノズルを通過する流体の流量係数Cは、縮流の収
縮係数Ccと速度係数Cvとの積で求められる。即
ちC=CcCvとなる。 The following explanation will be given with reference to Fig. 1 and Fig. 2. In the figures, 1 is a nozzle, pressurized foam mixture is supplied from the left side, 2 is a convergent part attached to the nozzle 1, and 3 is a pipe spear connected to the tip of the convergent part 2 so as to form an air inlet 4. In the convergent part 2, a contraction flow 5 of the flow tube is generated as shown in Fig. 2, and negative pressure is generated on the outer periphery of this contraction flow 5, which causes the liquid to become granular from the outlet of the convergent part 2 and to be scattered toward the pipe spear 3, where it is well mixed with the air flowing in from the air inlet 4 and foamed, and then discharged from the pipe spear 3. In the figures, the case where the inlet angle θ' of the nozzle 1 is 180° is explained, but the contraction phenomenon occurs when this inlet angle θ is 1
This occurs at angles of 16°, as shown by the dashed line, and at angles greater than this up to 360°, and the degree of this phenomenon increases as θ increases, reaching a maximum at θ of 360°. The flow coefficient C of the fluid passing through the nozzle is calculated as the product of the contraction coefficient Cc of the contraction flow and the velocity coefficient Cv . In other words, C = CcCv .
縮流について第3図によりさらに説明すると、
Aはノズル1に収斂部2が付設されていない場合
について、ノズル1の入口角度θが16°の場合a、
180°の場合b、360°の場合cの各縮流を示す。B
はノズル1に収斂部2が付設されている場合につ
いて、上記同様a,b,cの各場合の縮流をそれ
ぞれ示す。Cはノズル1に収斂部2が付設されて
いることはBの場合と同様であるが、収斂部2の
長さがBの場合よりも長い場合のa,b,cの各
場合の縮流をそれぞれ示す。第3図から判るよう
に、ノズル1の入口角度θが大きければ大きい
程、縮流現象の度合い(縮流箇所の最小径)は著
しく、入口角度θが一定であれば、ノズル1に収
斂部2が付設されていなくとも(Aの場合)、付
設されていても(B,Cの場合)、縮流の度合い
は変らない。しかしCの場合のように収斂部2の
長さが存分に長く設定されていると、縮流後の流
体は再び収斂部2の管内いつぱいに広がつて流
れ、本願考案は第3図のCの場合の縮流5を利用
し、その場合θが16°以上そして収斂部2の長さ
lとその径Dとの比がl/D≧3にある時、泡混
合液は微粒子状となつて良好な発泡が得られるこ
とが確認された。 To further explain contracta flow using Figure 3,
A is for the case where the converging part 2 is not attached to the nozzle 1, and when the inlet angle θ of the nozzle 1 is 16°, a,
The contractions are shown in b for 180° and c for 360°. B
In the case where the converging portion 2 is attached to the nozzle 1, the same as above shows the contracted flow in each case of a, b, and c. C is the same as B in that the convergent part 2 is attached to the nozzle 1, but the condensed flow in each case of a, b, and c is when the length of the convergent part 2 is longer than in B. are shown respectively. As can be seen from Fig. 3, the larger the inlet angle θ of the nozzle 1, the more remarkable the degree of the constriction phenomenon (minimum diameter of the constriction point). Even if 2 is not attached (in the case of A) or even if it is attached (in the cases of B and C), the degree of contraction does not change. However, if the length of the convergent part 2 is set to be sufficiently long as in case C, the fluid after contraction spreads again to fill the pipe of the convergent part 2 and flows. Using the condensed flow 5 in case C, in that case, when θ is 16° or more and the ratio of the length l of the convergent part 2 to its diameter D is l/D≧3, the foam mixture becomes particulate. It was confirmed that good foaming could be obtained.
また第4図に示すように縮流発生部5に小口6
を設け導管7を介して泡原液層8と接続すると、
消火用泡原液を大気圧下の原液層8から供給し、
縮流箇所を通過中の流水に混入微粒子化され発泡
する混合機能付の泡ノズルが得られる。 In addition, as shown in FIG.
is provided and connected to the foam concentrate layer 8 via the conduit 7,
Supplying the fire extinguishing foam stock solution from the stock solution layer 8 under atmospheric pressure,
A foam nozzle with a mixing function is obtained in which the flowing water passing through the contraction point is mixed into fine particles and foamed.
この考案の泡ノズルは以上のように構成され作
用するので、泡ノズルのノズル部分全体を一体の
部品として加工し構成することが可能な構造簡単
で目詰りが起りにくい泡消火ノズルが得られる効
果がある。 Since the foam nozzle of this invention is constructed and operates as described above, it is possible to process and construct the entire nozzle part of the foam nozzle as an integral part, resulting in a foam fire extinguishing nozzle with a simple structure and less clogging. There is.
第1図はこの考案の泡ノズルの縦断面図、第2
図は第1図のノズルに流れる泡混合液の状態を示
す縦断面図、第3図は縮流現象を示す説明図、第
4図はこの考案の混合機能を備えた泡ノズルの縦
断面図である。
1……ノズル、2……収斂部、3……管槍、4
……空気流入口、5……縮流、6……小口、7…
…導管、8……泡原液層。
Figure 1 is a vertical sectional view of the foam nozzle of this invention, Figure 2
The figure is a vertical cross-sectional view showing the state of the foam mixture flowing into the nozzle in Figure 1, Figure 3 is an explanatory diagram showing the contraction phenomenon, and Figure 4 is a vertical cross-sectional view of the foam nozzle equipped with the mixing function of this invention. It is. 1... Nozzle, 2... Converging part, 3... Tube spear, 4
...Air inlet, 5... Contraction, 6... Small mouth, 7...
... Conduit, 8... Foam stock solution layer.
Claims (1)
ノズルの出口側においてこのノズルに一体に付設
された直管状の収斂部と、空気流入口を形成する
ように収斂部の先端を囲んで連接された管槍とで
構成され、収斂部の長さをlその直径をDとする
とそれらの関係をl/D≧3としたことを特徴と
する消火用泡ノズル。 a nozzle with an inlet angle ranging from 16° to 360°;
It consists of a straight pipe-shaped converging part that is integrally attached to the nozzle on the exit side of the nozzle, and a pipe lance that is connected to surround the tip of the converging part to form an air inlet, and the length of the converging part is A fire extinguishing foam nozzle characterized in that the relationship between l and D is l/D≧3.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4424083U JPS59150464U (en) | 1983-03-29 | 1983-03-29 | fire extinguishing foam nozzle |
CH153584A CH662067A5 (en) | 1983-03-29 | 1984-03-27 | NOZZLE FOR FIRE EXTINGUISHING FOAM. |
FR8404823A FR2543454B3 (en) | 1983-03-29 | 1984-03-28 | FOAM SPRAY NOZZLE FOR EXTINGUISHER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4424083U JPS59150464U (en) | 1983-03-29 | 1983-03-29 | fire extinguishing foam nozzle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59150464U JPS59150464U (en) | 1984-10-08 |
JPH0510831Y2 true JPH0510831Y2 (en) | 1993-03-17 |
Family
ID=12686005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4424083U Granted JPS59150464U (en) | 1983-03-29 | 1983-03-29 | fire extinguishing foam nozzle |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS59150464U (en) |
CH (1) | CH662067A5 (en) |
FR (1) | FR2543454B3 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3442901A1 (en) * | 1984-11-24 | 1986-06-05 | Zeller Plastik Koehn Graebner | Foam generator |
GB0030212D0 (en) * | 2000-12-12 | 2001-01-24 | Zahan Stephen T | Horn for a fire extinguisher |
GB2388023B (en) * | 2002-04-30 | 2005-10-19 | John Thorne | Improved fire extinguishing device |
JP5850644B2 (en) * | 2010-05-21 | 2016-02-03 | 深田工業株式会社 | Foam release device, foam release method, and foam release device design method |
GB201122263D0 (en) * | 2011-12-23 | 2012-02-01 | Weeding Technologies Ltd | Weed control |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53103697A (en) * | 1977-02-21 | 1978-09-09 | Nippon Dry Chemical Kk | Method of projecting water |
-
1983
- 1983-03-29 JP JP4424083U patent/JPS59150464U/en active Granted
-
1984
- 1984-03-27 CH CH153584A patent/CH662067A5/en not_active IP Right Cessation
- 1984-03-28 FR FR8404823A patent/FR2543454B3/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53103697A (en) * | 1977-02-21 | 1978-09-09 | Nippon Dry Chemical Kk | Method of projecting water |
Also Published As
Publication number | Publication date |
---|---|
CH662067A5 (en) | 1987-09-15 |
FR2543454A1 (en) | 1984-10-05 |
JPS59150464U (en) | 1984-10-08 |
FR2543454B3 (en) | 1985-06-14 |
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