CN1317048C - Atomized spray nozzle for fire fighting - Google Patents
Atomized spray nozzle for fire fighting Download PDFInfo
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- CN1317048C CN1317048C CNB2004100129593A CN200410012959A CN1317048C CN 1317048 C CN1317048 C CN 1317048C CN B2004100129593 A CNB2004100129593 A CN B2004100129593A CN 200410012959 A CN200410012959 A CN 200410012959A CN 1317048 C CN1317048 C CN 1317048C
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- nozzle
- separation sleeve
- core
- nozzle body
- fire extinguishing
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Abstract
The present invention relates to a fire extinguishing atomizing nozzle for a fire fighting and fire extinguishing system, which aims to produce water mist suitable for fire extinguishment to overcome the defects existing in the prior art. A conical isolating sleeve [2] in which a nozzle core [3] is embedded is arranged in a conical bore at the front end of a nozzle body [1]; the isolating sleeve and the nozzle core are fixed in the nozzle body by a clamping ring [4]; a path is arranged between the isolating sleeve and the nozzle body, and another path is arranged between the nozzle core and the isolating sleeve to form a double-layer nozzle. An internal spiral slot [c] serving as a path is arranged on a step at the front end of the nozzle core [3], and an external spiral slot [d] serving as a path is arranged on a step outside the isolating sleeve [2]. Under the condition of basically the same working pressure and flow capacity, compared with a single-level solid nozzle, the double-level nozzle has the advantages of more uniform droplet distribution and bigger coverage of a spray cone.
Description
Technical field
The present invention is a kind of nozzle, is used for fire-fighting system.
Background technology
High-pressure fine water mist fire-extinguishing system is to utilize water under high pressure by force by waterfog head, forms thin water smoke, evenly covers the surface of object of protection.Thin water smoke surface area is big, can vaporize fast, absorbs scene of a fire heat fully, sharply reduces fire scene temperature.Simultaneously, vaporization formed steam after droplet was heated, and the oxygen concentration in the comburant surrounding air is reduced, and burning is suppressed because of anoxic or interrupts.
Water Mist Fire Extinguishing Technique to the basic demand of droplet is: being evenly distributed of 1 droplet can form stable mist awl and cover the fire area; 2 droplets have bigger momentum, can be penetrated into the root of burning things which may cause a fire disaster.According to the distribution situation of droplet, nozzle can be divided into hollow atomizer and solid atomizer.Traditional nozzle originates from spray-drying and spray combustion, mainly is hollow atomizer.Hollow atomizer central area does not have droplet, and jet length is short, is difficult to effective fire extinguishing.Near the droplet skewness of solid atomizer, nozzle-axis droplet is thick, and peripheral droplet is tiny.Under the effect of entrainmenting of air-flow, peripheral mist drips to the center and shrinks, and is difficult to form stable mist awl, and the droplet area coverage is very limited.
For overcoming the little problem of conventional spout mist awl coverage rate, Denmark Danfoss company, Finland MarioffHi-Fog company and U.S. Spray System company have developed built up nozzle in succession, but the mist awl has interference between nozzle, and fogdrop diameter increases.People such as the yellow eastern woods of Chinese University of Science and Technology have proposed the reed-type hydraulic spray nozzle, and its jet length, mist particle diameter and water consumption are studied, and see the analysis of reed-type spraying extinguisher reason. Fire Science .1992.9.People such as the Fan Minghao of Zhejiang University have carried out theory analysis to the VELOCITY DISTRIBUTION and the droplet average diameter of convergence type high-pressure spray nozzle droplet, see the atomization characteristics research of high-pressure water mist fire-extinguishing nozzle. mechanical engineering journal .2002.9.These two kinds of true hearts of nozzle.Because the current in the nozzle move without spin, so the droplet good uniformity, (0.2～0.8mm), the fire extinguishing effect is not good enough but mist particle diameter is big.
Summary of the invention
For overcoming the defective of prior art, the present invention proposes a kind of fire extinguishing atomizer, has double-deck centrifugal structure, is used to produce the thin water smoke that is fit to fire extinguishing.
A kind of fire extinguishing atomizer of the present invention, comprise that front end has the nozzle body of taper hole, it is characterized by that described nozzle body front end taper hole is built-in with conical separation sleeve, separation sleeve is embedded in nozzle core, snap ring is fixed in separation sleeve and nozzle core in the nozzle body, between separation sleeve and the nozzle body, have passage between nozzle core and the separation sleeve, constitute double-deck nozzle.
Described fire extinguishing atomizer, its cone angle [β] that further is characterized as nozzle body front end taper hole is 90～100 °; The cone angle of separation sleeve internal taper hole [α] is 70～80 °; Have the external spiral groove that has on the step in inner spiral groove as passage, the separation sleeve outside as passage on the nozzle core front end step, two helicla flutes and axis angle are 40～50 °.
Described fire extinguishing atomizer, the described inside and outside helicla flute hand of spiral can be opposite.
Have external spiral groove [d] on the step in the separation sleeve outside of fire extinguishing atomizer; Have inner spiral groove [c] on the nozzle core front end step.Constitute internal layer nozzle vortex chamber between nozzle core and the separation sleeve, constitute the nozzle outer vortex chamber between separation sleeve and the nozzle body.Water under high pressure from pipeline enters inside and outside layer nozzle vortex chamber respectively by water channel [a], [b] and inside and outside helicla flute [c], [d], and sprays from jet hole.Considered during design that the average fogdrop diameter of nozzle outer is slightly larger than the average fogdrop diameter of internal layer nozzle, the average fogdrop diameter of nozzle outer is the average fogdrop diameter 1.1～1.3 of internal layer nozzle.Under operating pressure and the essentially identical condition of flow, to compare with individual layer is solid, the droplet of double-deck nozzle is more evenly distributed, and the coverage of mist awl is also much bigger.
Description of drawings
Fig. 1 structural representation of the present invention;
Fig. 2 separation sleeve structural representation;
Fig. 3 nozzle core structural representation;
The double-deck nozzle spray strength distribution curve of Fig. 4 the present invention.
The specific embodiment
The double-deck nozzle of the present invention comprises nozzle body 1, separation sleeve 2, nozzle core 3 and snap ring 4, sees Fig. 1.The separation sleeve structure is seen Fig. 2, and the figure lower middle portion is the vertical view on top; Have 40～50 ° of external spiral groove d on the step in separation sleeve 2 outsides.The nozzle core structure is seen Fig. 3, and the figure lower middle portion is the vertical view on top; Have 40～50 ° of inner spiral groove c on the nozzle core front end step.Constitute internal layer nozzle vortex chamber between nozzle core and the separation sleeve, its cone angle is 70～80 °, constitutes the nozzle outer vortex chamber between separation sleeve and the nozzle body, and its cone angle beta is 90～100 °.Water under high pressure from pipeline enters inside and outside layer nozzle vortex chamber respectively by water channel a, b and inside and outside helicla flute c, d, and sprays from jet hole.
Embodiment 1:
Double-deck structure of nozzle parameter is: internal layer nozzle vortex chamber inlet equivalent radius r
c=1.5mm, the outlet radius r
0=0.6mm, cone angle=70 °; Nozzle outer vortex chamber inlet equivalent radius r
d=1.5mm, the outlet radius r
1=1.0mm, r
2=1.2mm, cone angle beta=90 °.The helical angle of internal and external screw groove is 45 °.The nozzle inner walls surface roughness is 0.8 μ m.As pressure P=8.0MPa, during flow Q=5.5L/min, the atomizing intensity of double-deck nozzle and 1918 solid cone spray nozzles of Denmark Danfoss company is to distributing than seeing Fig. 4.Fig. 4 shows, under operating pressure and the essentially identical condition of flow, compares with individual layer is solid, and the droplet of double-deck nozzle is more evenly distributed, and the coverage of mist awl is also much bigger.
Embodiment 2:
Cone angle=70 °, cone angle beta=100 °, ectonexine spiral fluted helical angle is 50 °, and all the other parameters of double-deck nozzle are with embodiment 1.
Claims (3)
- One kind the fire extinguishing atomizer, comprise that front end has the nozzle body of taper hole [1], it is characterized by that described nozzle body front end taper hole is built-in with conical separation sleeve [2], separation sleeve is embedded in nozzle core [3], snap ring [4] is fixed in separation sleeve and nozzle core in the nozzle body, between separation sleeve and the nozzle body, have passage between nozzle core and the separation sleeve, constitute double-deck nozzle; Have the external spiral groove [d] that has on the step in inner spiral groove [c] as passage, separation sleeve [2] outside as passage on nozzle core [3] the front end step, two helicla flutes and axis angle are 40～50 °.
- 2. fire extinguishing atomizer as claimed in claim 1, the cone angle [β] that it is characterized by nozzle body front end taper hole is 90～100 °; The cone angle of separation sleeve internal taper hole [α] is 70～80 °.
- 3. fire extinguishing atomizer as claimed in claim 2, it is opposite to it is characterized by the described inside and outside helicla flute hand of spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100129593A CN1317048C (en) | 2004-04-02 | 2004-04-02 | Atomized spray nozzle for fire fighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100129593A CN1317048C (en) | 2004-04-02 | 2004-04-02 | Atomized spray nozzle for fire fighting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562418A CN1562418A (en) | 2005-01-12 |
| CN1317048C true CN1317048C (en) | 2007-05-23 |
Family
ID=34478094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100129593A Expired - Fee Related CN1317048C (en) | 2004-04-02 | 2004-04-02 | Atomized spray nozzle for fire fighting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317048C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102335491B (en) * | 2011-07-27 | 2013-07-10 | 江苏中瑞电保智能装备有限公司 | Pipe network type dry powder fire extinguishing system and method |
| CN102327683A (en) * | 2011-07-27 | 2012-01-25 | 江苏中瑞电保智能装备有限公司 | Embedded nozzle |
| CN104014096B (en) * | 2014-06-20 | 2016-05-25 | 武汉科技大学 | A kind of straight-through double helix convergence type hydraulic atomizing nozzle |
| CN106140501A (en) * | 2015-04-15 | 2016-11-23 | 安徽艾可蓝节能环保科技有限公司 | A kind of atomizer for engines tail gas disposal |
| CN105107120B (en) * | 2015-07-01 | 2018-07-20 | 凌文祥 | Applicator |
| CN106693250A (en) * | 2016-09-27 | 2017-05-24 | 何先庆 | Direct-current water mist multifunctional water gun |
| CN109125996A (en) * | 2017-06-28 | 2019-01-04 | 四川天法科技有限公司 | A kind of mist-generating nozzle and the fine mist spray head using this nozzle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032194A1 (en) * | 1997-12-19 | 1999-07-01 | Firexpress Aps | A fire extinguishing device |
| CN2582661Y (en) * | 2002-12-17 | 2003-10-29 | 中国科学技术大学 | Liquid atomization spray nozzle for fire-extinguishing |
| CN2688319Y (en) * | 2004-04-02 | 2005-03-30 | 华中科技大学 | Fire extinguishing atomizing nozzles |
-
2004
- 2004-04-02 CN CNB2004100129593A patent/CN1317048C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032194A1 (en) * | 1997-12-19 | 1999-07-01 | Firexpress Aps | A fire extinguishing device |
| CN2582661Y (en) * | 2002-12-17 | 2003-10-29 | 中国科学技术大学 | Liquid atomization spray nozzle for fire-extinguishing |
| CN2688319Y (en) * | 2004-04-02 | 2005-03-30 | 华中科技大学 | Fire extinguishing atomizing nozzles |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1562418A (en) | 2005-01-12 |
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