CN203507371U - Micro water fog spray head based on bubble atomization - Google Patents
Micro water fog spray head based on bubble atomization Download PDFInfo
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- CN203507371U CN203507371U CN201320574616.0U CN201320574616U CN203507371U CN 203507371 U CN203507371 U CN 203507371U CN 201320574616 U CN201320574616 U CN 201320574616U CN 203507371 U CN203507371 U CN 203507371U
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- air injection
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Abstract
The utility model discloses a micro water fog spray head based on bubble atomization. The micro water fog spray head is characterized in that an air filling pipe in the micro water fog spray head is in threaded connection with a mixing cavity, so that the distance between each air filling hole and a spray hole can be adjusted; 2 to 3 rows of air filling holes are formed in the side surface of the air filling pipe, and 4 to 7 air filling holes are formed in the bottom of the air filling pipe; each row of air filling holes in the side surface of the air filling pipe are uniformly distributed on the circumference in which the cross section of the air filling pipe is located, and the air filling holes in the bottom of the air filling pipe are also uniformly distributed along the circumference; the rows of air filling holes are arrayed at equal intervals in the side surface of the air filling pipe, and each air filling hole inclines down for an angle of 40 to 50 degrees; the spray hole is formed in the center of the bottom surface of a nozzle. Compared with a conventional fine water fog spray head, the micro water fog spray head has the advantages of small working pressure, less required atomizing air, larger spray-hole diameter, good atomizing effect, applicability to the field of fire protection, high extinguishing effectiveness and the like.
Description
Technical field
The utility model belongs to micro-waterfog head technical field for fire-fighting fire extinguishing, is specifically related to the fire extinguishing based on effervescent atomization, cooling, the micro-waterfog head of decontamination of spraying.
Background technology
The thin water smoke method for generation of pneumatic type according to the doctorate paper < < of China Science & Technology University based on steam assisted atomization and fire extinguishing validity simulation experiment study > > (Xiao Xiukun, 2011) introduce, existing fine mist spray head mainly contains single fluid shower nozzle and two-fluid sprays first two.Single-fluid water mist shower nozzle is mainly pressure type and impacting type atomizer, application is very extensive at present, impacting type atomizer generally moves under low-voltage and medium voltage, but be subject to the impact of the size and dimension of metal impact head, the thin water smoke particle diameter producing is relatively large, is generally the 2nd grade and the thin water smoke of 3rd level; Pressure type atomizer is by by liquid pressing, current are sprayed at a high speed from the spout of small-bore, the droplet (the 1st grade of thin water smoke) that produces small particle diameter needs very high operating pressure, generally be greater than 10MPa, greatly increased the cost of system, and the diameter of Nozzle needs enough little, is generally less than 1 millimeter, therefore easily stop up.Traditional double fluid fine mist spray head utilizes Compressed Gas to form thin water smoke to the shear action of water, the operating pressure of water and Compressed Gas is between 0.3 to 0.7MPa, in this low pressure range, this technology can produce the 1st grade of thin water smoke, but because this nozzle structure is comparatively complicated, and must rely on swiftly flowing Aerodynamic force action by the atomization of liquid, air consumption is large, and therefore this shower nozzle there be limited evidence currently of is applied in actual fire engineering.
Effervescent atomizer belongs to novel double fluid atomization nozzle, at internal combustion engine, gas turbine, Industrial Boiler, the spray burning aspects such as liquid waste incinerator are widely used, but application is few in fire-fighting fire extinguishing field, as disclosed in China Patent Publication No. CN2211543Y a kind of " effervescent atomizer " is owing to adopting ring exit ejection, droplet is carbon fiber and distributes, liquids and gases import simultaneously enters nozzle from same direction, the momentum that gas has is less, entering the bubbly two-phase flow forming in liquid is short of power, cause spray intensity inadequate, be not suitable for for fire extinguishing and the cooling field of spraying.Existing bubble atomization water mist sprayer seldom, as disclosed in China Patent Publication No. CN201921369U a kind of " bubble atomization water mist sprayer " adopts outer gas internal liquid type form, because this shower nozzle combines swirling flow atomizing technology, in one end of porous inner tube, added eddy flow core, increase manufacturing cost, caused complex structure simultaneously; Due to injecting hole axis direction on porous inner tube and porous inner tube axis perpendicular, in the process that gas enters porous inner tube by annular chamber, to overcome very large fluid pressure, this has weakened the quality of effervescent atomization.Utilize separately the micro-waterfog head that is applied to fire-fighting fire extinguishing technical field of effervescent atomization technology also to there is not yet at present report.
Utility model content
The purpose of this utility model is to provide a kind of micro-waterfog head based on effervescent atomization, to realize, produces high-performance water smoke under lower operating pressure, thereby provides core technology to support for development spraying fire extinguishing and the technology such as cooling of spraying.
The micro-waterfog head of the utility model based on effervescent atomization, its outside is followed successively by the water supply connector 1 being mutually threaded connection, inlet suction port 2, sleeve pipe 4, cap of spraying nozzle 5 and nozzle 6; The air injection pipe 3 that is positioned at shower nozzle inside is connected by screw thread with water supply connector 1, and has one end of injecting hole 8 near nozzle 6, and and sleeve pipe 4 between form hybrid chamber 12; It is characterized in that: air injection pipe 3 is threaded connection injecting hole can be regulated apart from the distance of spout with hybrid chamber 12, and air injection pipe external diameter is 10～15 millimeters; The side of described air injection pipe 3 has 2-3 and arranges equally spaced injecting hole 8,3～5 millimeters of row's spacing, and aperture is 1.0～2.5 millimeters, 6～12 of every row's injecting holes, the bottom of air injection pipe 3 has 4-7 injecting hole 9, and aperture is also 1.0～2.5 millimeters; The side equal downtilt angles of each injecting hole is 40 °-50 °, preferably all downward-sloping 45 °; The every row's injecting hole in air injection pipe side is evenly distributed on the circumference at air injection pipe cross section place, and bottom injecting hole is also to distribute along even circumferential; Described nozzle 6, is connected with cap of spraying nozzle 5 by screw thread, and it is coniform that nozzle is, and bottom is planar structure, and spout number is 7～9, and bottom center arranges a spout, and residue spout is evenly distributed on taper seat, and nozzle diameter is 1.0～1.5 millimeters.
For obtaining good atomizing effect, the injecting hole 8 of air injection pipe 3 sides of described shower nozzle adopts downward-sloping 40 ° of-50 ° of angles, preferred downward-sloping 45° angle degree; And the bottom in air injection pipe increases injecting hole 9; The spout of described nozzle can be preferably designed for two kinds of eight spouts and nine spouts, the former is all evenly distributed on taper seat by spout, the latter is on the former basis, in bottom center, increase a spout, the object of doing is like this in order to obtain mist field more uniformly, prevent hollow mist field, improve the center intensity of mist field.
Micro-waterfog head of effervescent atomization of the present utility model, during use, can take the form of the outer liquid of interior gas, atomization gas is to flow in air injection pipe, gas enters into liquid around by injecting hole, form bubble liquid two phase flow, in nozzle interior, complete atomization process, therefore only a small amount of atomization gas need be injected in atomized water the mode with bubble, thereby overcome the shortcoming that traditional Double-fluid atomization nozzle is larger to atomization gas demand; Injecting hole axis in air injection pipe and air injection pipe axis are certain angle, and in the time of can avoiding vertical, gas is directly injected on hybrid chamber wall, is unfavorable for the shortcoming of the generation of bubble, realizes good atomizing effect; Bubble can be by the swelling fracture auxiliary liquid fragmentation atomization of self after the ejection of Nozzle place, thereby realize with lower atomizing pressure, just reach pressure atomization shower nozzle at the atomizing effect compared with under high atomization pressure condition, greatly improve system self security, reduce its application cost; Because effervescent atomization technology can guarantee also can obtain good atomizing effect at nozzle diameter during at 1.0-1.5 millimeter, thereby can overcome conventional high-tension fine mist spray head, while being less than the water smoke of 100 microns for obtaining particle diameter, nozzle diameter need be less than 0.8 millimeter of requirement, solves the less problem that easily causes obstruction of nozzle diameter simultaneously.Because the micro-waterfog head nozzle of the utility model based on effervescent atomization is taper, spout is evenly distributed on taper seat, increases a spout simultaneously can realize spraying more uniformly in bottom surface, has overcome the shortcoming that traditional effervescent atomizer forms hollow mist field.The micro-waterfog head of the utility model based on effervescent atomization, can realize the gas injection pressure at 0.4MPa, gas-liquid mass flow ratio (GLR) is that under 0.06 condition, single jet nozzle produces micro-water smoke that mist droplet particle size is less than 100 microns, fire extinguishing validity is high, safe, cost is lower, can be widely used in fire-fighting or public safety emergency field.
Accompanying drawing explanation
Fig. 1 is a kind of concrete enforcement structural representation of the micro-waterfog head of the utility model based on effervescent atomization.
Fig. 2 is the double injecting hole air injection pipe half sectional view of the micro-waterfog head of the utility model;
Fig. 3 is the double injecting hole air injection pipe cross section view of the micro-waterfog head of the utility model.
Fig. 4 is three row's injecting hole air injection pipe half sectional views of the micro-waterfog head of the utility model;
Fig. 5 is three row injecting hole air injection pipe cross section cutaway views of the micro-waterfog head of the utility model.
Fig. 6 is that the nozzle of the micro-waterfog head of the utility model partly cuts open schematic diagram.
Fig. 7 is the nozzle spout distribution schematic diagram of the micro-waterfog head of the utility model.
The specific embodiment
Embodiment 1:
The structure of the micro-waterfog head based on effervescent atomization of the utility model embodiment as shown in Figure 1.Micro-waterfog head based on effervescent atomization of the present embodiment, this shower nozzle outside is followed successively by the water supply connector 1 being mutually threaded connection, inlet suction port 2, sleeve pipe 4, cap of spraying nozzle 5, nozzle 6; The air injection pipe 3 that is positioned at shower nozzle inside is connected by screw thread with water supply connector 1, and it has one end of injecting hole 14 near nozzle 6, and and sleeve pipe 4 between form hybrid chamber 12; Air injection pipe 3 is threaded connection injecting hole can be regulated apart from the distance of spout with hybrid chamber 12; In described air injection pipe 3, have injecting hole 8,9; Fig. 2 is the air injection pipe half sectional view of the micro-waterfog head of the present embodiment, Fig. 3 is the double injecting hole air injection pipe cross section view of micro-waterfog head: the injecting hole 8,9 in described air injection pipe 3 is separately positioned on side and bottom, side arranges two row 24 holes, 5 millimeters of row's spacing, bottom arranges 7 holes, the every row of side injecting hole 12 holes are evenly distributed on air injection pipe circumference, 14 millimeters of air injection pipe external diameters, 1 millimeter of injecting hole diameter; All downward-sloping 45 ° of side injecting holes 8, and be evenly distributed on air injection pipe circumference, bottom surface injecting hole 9, center arranges one, and all the other six are evenly distributed on circumference, as shown in Fig. 2, Fig. 3; Fig. 6 is that the nozzle of the micro-waterfog head of the utility model partly cuts open schematic diagram; Fig. 7 is the nozzle spout distribution schematic diagram of micro-waterfog head: on described nozzle orifice design 9 holes, wherein 8 spouts 10 are evenly distributed on taper seat, bottom center increases a spout 11, nozzle diameter is 1.2 millimeters, concrete as shown in Fig. 6, Fig. 7.
Workflow when the micro-waterfog head of the present embodiment based on effervescent atomization used is as follows: gas enters air injection pipe 3 by inlet suction port 1, liquid enters hybrid chamber 18 by water supply connector 2, the interior gas of air injection pipe 3 is by injecting hole 14, 15 enter hybrid chamber 18 mixes with liquid water, forming stable biphase gas and liquid flow flows, containing alveolate liquid, in hybrid chamber 18, move downward, along with constantly there being bubble to enter hybrid chamber 18, the interior bubble density of hybrid chamber 18 increases, pressure increases, bubble strengthens the extruding of liquid and shear action, and final air injection pipe 3 bottoms and the further atomization of spout 6 accumulation, make liquid with the form ejection of the brin that comprises a large amount of micro-bubbles or liquidus, form good mist field.The micro-waterfog head of the present embodiment based on effervescent atomization, can be at 0.4MPa gas injection pressure, gas-liquid mass flow ratio (GLR) is under 0.06 condition, under single jet nozzle strip part, to produce micro-water smoke that mist droplet particle size is less than 100 microns, realizes good atomizing effect, and fire extinguishing validity is high.
Embodiment 2:
The structure of the micro-waterfog head of the present embodiment based on effervescent atomization is identical with embodiment 1, and difference is that the physical dimension of air injection pipe changes, and mainly refers to air injection pipe external diameter, the diameter of injecting hole, quantity and distribution.The micro-waterfog head of the present embodiment based on effervescent atomization, this shower nozzle outside is followed successively by the water supply connector 1 being mutually threaded connection, inlet suction port 2, sleeve pipe 4, cap of spraying nozzle 5, nozzle 6; The air injection pipe 3 that is positioned at shower nozzle inside is connected by screw thread with water supply connector 1, and it has one end of injecting hole 8 near nozzle 6, and and sleeve pipe 4 between form hybrid chamber 12; Air injection pipe 3 is threaded connection injecting hole can be regulated apart from the distance of spout with hybrid chamber 12; In described air injection pipe 3, have injecting hole 8,9; Fig. 4 is the air injection pipe half sectional view of the micro-waterfog head of the present embodiment, Fig. 5 is three row injecting hole air injection pipe cross section cutaway views of micro-waterfog head: the injecting hole 8,9 in described air injection pipe 3 is separately positioned on side and bottom, side arranges 18 injecting holes of three rows, row's spacing is 5 millimeters, bottom arranges 4 injecting holes, 6 injecting holes of the every row in side, be evenly distributed on air injection pipe circumference, 4 of bottom surfaces injecting hole is evenly distributed on the circumference in the center of circle, 10 millimeters of air injection pipe external diameters, 2 millimeters of injecting hole diameters, concrete as shown in Fig. 4, Fig. 5; All downward-sloping 45 ° of side injecting holes 8, and be evenly distributed on air injection pipe circumference; On described nozzle orifice design 9 holes, wherein 8 spouts 10 are evenly distributed on taper seat, bottom center increases a spout 17, nozzle diameter is 1.2 millimeters, concrete as shown in Fig. 6, Fig. 7.
Workflow when the micro-waterfog head of the present embodiment based on effervescent atomization used is as follows: gas enters air injection pipe 3 by inlet suction port 1, liquid enters hybrid chamber 12 by water supply connector 2, the interior gas of air injection pipe 3 is by injecting hole 8, 9 enter hybrid chamber 12 mixes with liquid water, forming stable biphase gas and liquid flow flows, containing alveolate liquid, in hybrid chamber 12, move downward, along with constantly there being bubble to enter hybrid chamber 12, the interior bubble density of hybrid chamber 12 increases, pressure increases, bubble strengthens the extruding of liquid and shear action, and final air injection pipe 3 bottoms and the further atomization of spout 6 accumulation, make liquid with the form ejection of the brin that comprises a large amount of micro-bubbles or liquidus, form good mist field.The micro-waterfog head based on effervescent atomization in the present embodiment and comparing in embodiment 1, owing to having reduced the external diameter of air injection pipe 3, increased the aperture of injecting hole, increased the number of air injection pipe bottom injecting hole, make bubble ratio concentrate on hybrid chamber middle part, can be so that the void fraction of center nozzle increase, atomization characteristics is better, and fire extinguishing validity is higher.
Claims (5)
1. the micro-waterfog head based on effervescent atomization, its outside is followed successively by the water supply connector (1) being mutually threaded connection, inlet suction port (2), sleeve pipe (4), cap of spraying nozzle (5) and nozzle (6); The air injection pipe (3) that is positioned at shower nozzle inside is connected by screw thread with water supply connector (1), and has one end of injecting hole (8) near nozzle (6), and and sleeve pipe (4) between form hybrid chamber (12); It is characterized in that: air injection pipe (3) is threaded connection injecting hole can be regulated apart from the distance of spout with hybrid chamber (12), and air injection pipe external diameter is 10～15 millimeters; The side of described air injection pipe (3) has 2-3 and arranges equally spaced injecting hole (8), 3～5 millimeters of row's spacing, aperture is 1.0～2.5 millimeters, 6～12 of every row's injecting holes, the bottom of air injection pipe (3) has 4-7 injecting hole (9), and aperture is also 1.0～2.5 millimeters; The side equal downtilt angles of each injecting hole is 40 °-50 °; The every row's injecting hole in air injection pipe side is evenly distributed on the circumference at air injection pipe cross section place, and bottom injecting hole is also to distribute along even circumferential; Described nozzle (6) is connected with cap of spraying nozzle (5) by screw thread, and it is coniform that nozzle is, and bottom is planar structure, spout number is 7～9, bottom center arranges a spout (11), and residue spout is evenly distributed on taper seat, and nozzle diameter is 1.0～1.5 millimeters.
2. the micro-waterfog head based on effervescent atomization as claimed in claim 1, is characterised in that the injecting hole (14) of air injection pipe (3) side of described shower nozzle adopts downward-sloping 40 ° of-50 ° of angles, and increases injecting hole (9) in the bottom of air injection pipe.
3. the micro-waterfog head based on effervescent atomization as claimed in claim 2, is characterised in that the downtilt angles that the injecting hole (8) of air injection pipe (3) side of described shower nozzle adopts is 45 °.
4. the micro-waterfog head based on effervescent atomization as claimed in claim 1, the spout that is characterised in that described nozzle is eight spouts that are evenly distributed on taper seat.
5. the micro-waterfog head based on effervescent atomization as claimed in claim 4, is characterised in that the spout of described nozzle, on the eight spout bases that are evenly distributed on taper seat, increases by nine spouts of a spout in bottom center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320574616.0U CN203507371U (en) | 2013-09-13 | 2013-09-13 | Micro water fog spray head based on bubble atomization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320574616.0U CN203507371U (en) | 2013-09-13 | 2013-09-13 | Micro water fog spray head based on bubble atomization |
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| Publication Number | Publication Date |
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| CN203507371U true CN203507371U (en) | 2014-04-02 |
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| CN201320574616.0U Expired - Fee Related CN203507371U (en) | 2013-09-13 | 2013-09-13 | Micro water fog spray head based on bubble atomization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446691A (en) * | 2013-09-13 | 2013-12-18 | 中国科学技术大学 | Micro water fog spray nozzle based on bubble atomization |
| CN111172600A (en) * | 2020-01-14 | 2020-05-19 | 中原工学院 | Bubble atomization electrostatic spinning nozzle, electrostatic spinning device and application thereof |
-
2013
- 2013-09-13 CN CN201320574616.0U patent/CN203507371U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446691A (en) * | 2013-09-13 | 2013-12-18 | 中国科学技术大学 | Micro water fog spray nozzle based on bubble atomization |
| CN111172600A (en) * | 2020-01-14 | 2020-05-19 | 中原工学院 | Bubble atomization electrostatic spinning nozzle, electrostatic spinning device and application thereof |
| CN111172600B (en) * | 2020-01-14 | 2021-10-26 | 中原工学院 | Bubble atomization electrostatic spinning nozzle, electrostatic spinning device and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20160913 |