CN202516208U - Water mist spray head - Google Patents
Water mist spray head Download PDFInfo
- Publication number
- CN202516208U CN202516208U CN201220202109XU CN201220202109U CN202516208U CN 202516208 U CN202516208 U CN 202516208U CN 201220202109X U CN201220202109X U CN 201220202109XU CN 201220202109 U CN201220202109 U CN 201220202109U CN 202516208 U CN202516208 U CN 202516208U
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- inlet channel
- spray head
- water inlet
- side inlet
- mist spray
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model discloses a water mist spray head, which comprises a water inlet, a mixing cavity and a water outlet, and the water inlet comprises a central water inlet channel and a plurality of side water inlet channels; an axial line of each side water inlet channel is vertically intersected with a radial line of the mixing cavity, and an intersection angle between the axial line of each side water inlet channel and a radial plane of the mixing cavity is larger than 0 degree but less than 90 degrees; and the side water inlet channels are symmetrically arranged on a periphery of the central water inlet channel, and a distance between each side water inlet channel and the central water inlet channel is smaller than the radial semi-diameter of the mixing cavity. The water mist spray head is provided with a larger axial momentum, mist drops are enabled to pass through the fireground space to the maximum, and the deep fire extinguishing is realized; and meanwhile a radial momentum of the water mist is maintained, an atomization angle of water mist is enlarged, the extinguishing scope of water mist is expanded, and the spray head is small in size, simple in structure, convenient in processing and low in manufacture cost, and can be suitable for batch production. Experiments show that atomization performance and momentum index of the spray head are better, and the spray head has better extinguish capability on fires.
Description
Technical field
The utility model belongs to security against fire equipment design field, belongs to especially that hydraulic giant manufactures and designs in the fire-fighting equipment, particularly the waterfog head design and manufacturing technology of hydraulic giant.
Background technology
In recent years, Water Mist Fire Extinguishing Technique replaces halon fire agent to become the fire-fighting technique of main flow with its environmental protection, characteristics such as efficient, nontoxic gradually, is one of focus of fire science research.Study on Water Mist Fire Extinguishing Technique has obtained major progress at present; Yet fine mist spray head but is its bottleneck that further develops of containment; The atomizing effect of traditional direct atomizer is undesirable, and atomizing angle is little little with radius of protection, has limited the range of application of fine water mist fire-extinguishing system.
Solving atomizing angle and radius of protection problem has several different methods, comprises improved direct projection-rotational flow atomized spray injector of shower nozzle and the atomizer that revolves cored structure.
The atomizer that revolves cored structure is: high-pressure fluid gets into the eddy flow chamber of shower nozzle or nozzle interior under pressure-driven; In shower nozzle eddy flow chamber, have one to revolve core; Revolve core and under the driving of high-pressure fluid, produce strong rotation, be ejected in the booster action generation atomizing down of centrifugal force then from nozzle.The deficiency of this structure is, 1. revolves the energy loss that core can increase fluid, causes the spray momentum of nozzle low.2. revolve core and can cause the complicated volume of structure of nozzle to increase, need not also cause the corrosion runner to stop up for a long time easily, high manufacturing accuracy revolve the increase that core also brings manufacturing cost.If 3. excessively rely on the centrifugal force assisted atomization, the droplet of nozzle ejection can form a conical hollow, rather than solid cone shaped, and the spray flux density skewness can not be given full play to the effect of the high fire smothering of thin water smoke.
Direct projection-rotational flow atomized spray injector is: this shower nozzle has a bottom inlet and 2 side imports; 2 side imports get into shower nozzle with the tangent direction of shower nozzle internal face after with axial steering horizontal; Produce eddy flow; And produce direct projection stream with bottom inlet and mix mutually, forming strong turbulent motion with direct projection stream and eddy flow, the nozzle from shower nozzle sprays at last.This structure deficiency is, when current were got into by the import of 2 sides and shower nozzle inwall direction tangential, though can produce strong eddy flow, the energy that makes shower nozzle aspect axial momentum, lose was bigger, is unfavorable for that the degree of depth puts out a fire.
Summary of the invention
The utility model discloses a kind of waterfog head according to the deficiency of prior art; The problem that the utility model will solve provides a kind of new shower nozzle water inlet structure, to reduce the fluid inlet loss of momentum, reaches energy-conserving and environment-protective; Make the eddy flow in eddy flow chamber mix better; Improve shower nozzle and export axial kinetic energy, improve the atomization of shower nozzle, realize better fire extinguishing effect.
The utility model is realized through following technical scheme:
Fine mist spray head comprises water inlet, hybrid chamber and delivery port, and water inlet comprises center inlet channel and side inlet channel, it is characterized in that:
Side inlet channel axial line and hybrid chamber one RADIAL intersect vertically, and side inlet channel axial line and hybrid chamber sagittal plane have less than the angle of 90 degree greater than 0 degree;
A plurality of side inlet channels are positioned at around the inlet channel of center and are symmetrical set, and the distance of side inlet channel and center inlet channel is less than hybrid chamber radius radially.
Further the side inlet channel is positioned at inlet channel footpath, center towards periphery and be symmetrical set 2 to 6.
The preferential side inlet channel is positioned at center inlet channel footpath towards periphery and be symmetrical set 2.
Further side inlet channel axial line and hybrid chamber sagittal plane angle are 60 degree.
Further the axial line in lateral intake road is projected in and is 45 degree angles on the shower nozzle cross centre line plane.
Further side inlet channel diameter is more than or equal to center inlet channel diameter.
Preferential side inlet channel diameter is two times of center inlet channel diameter.
Further the distance of side inlet channel and center inlet channel be hybrid chamber radially radius 1/2nd.
Above-mentioned delivery port and center inlet channel are on same axis.
Above-mentioned hybrid chamber is connected end shape with delivery port be a cone.
Above-mentioned waterfog head has center inlet channel and the side inlet channel that becomes certain degree with center inlet channel axis; Side inlet channel angle equates that rotation direction is consistent; Side inlet channel eddy flow mixes with the direct projection stream that produces axial kinetic energy mutually; The intense mixing of center inlet channel direct projection stream and side inlet channel eddy flow forms swirling motion in hybrid chamber, under the promotion of the axial kinetic energy of center inlet channel, mixes eddy flow and forms thin water smoke from the delivery port ejection of shower nozzle with atmosphere generation strong collision at last.It is minimum that said structure makes that when keeping strong eddy flow the axial momentum loss of side water channel drops to, because the import current do not have turn sharp, reduced entrance loss with direct projection-rotational flow atomized spray injector comparison, practiced thrift energy, makes the eddy flow in eddy flow chamber mix better.
The utlity model has following advantage: have bigger axial momentum, make droplet penetrate space, the scene of a fire to greatest extent, realize degree of depth fire extinguishing; The radial momentum that has kept thin water smoke simultaneously increases the atomizing angle of thin water smoke, enlarges the fire extinguishing scope of thin water smoke, and volume is little, and simple in structure, easy to process, low cost of manufacture can be produced in batches.Experiment shows that the atomization of shower nozzle, momentum indicator are better, and fire is had the ability of putting out preferably.
Description of drawings
Fig. 1 is the utility model both sides inlet channel structural fluid flow field structure sketch mapes;
Fig. 2 adopts a kind of structural section sketch map of the utility model nozzle;
Fig. 3 is Fig. 2 inlet end face structural representation;
Fig. 4 adopts the utility model nozzle water inlet structure sketch map;
Fig. 5 is Fig. 4 BB cross section structure sketch map;
Fig. 6 is Fig. 4 AA cross section structure sketch map.
Among the figure, the 1st, water inlet, 1a are the center inlet channels, 1b is the side inlet channel, the 2nd, the sagittal plane, the 3rd, hybrid chamber, the 4th, delivery port, a are side inlet channel axial line and hybrid chamber sagittal plane angle angle.
The specific embodiment
Through embodiment the utility model is carried out concrete description below; Present embodiment only is used for the utility model is further explained; But can not be interpreted as the restriction to the utility model protection domain, those skilled in the art can make the scope that some nonessential improvement and adjustment belong to the utility model protection according to the content of above-mentioned the utility model.
Embodiment 1
In conjunction with Fig. 1.Fig. 1 is the utility model both sides inlet channel structural fluid flow field structure sketch mapes.Both sides inlet channel structural fluid flow field structure as shown in the figure, as in the restriction of structure, to form as scheme.Flow field structure one end is center inlet channel 1a and side inlet channel 1b, and this example has two side inlet channel 1b; The middle part is a hybrid chamber 3; The other end is a delivery port 4; Have among Fig. 1 two in hybrid chamber 3 one end sagittal planes 2 symmetrically arranged two side inlet channel 1b, can also be in hybrid chamber 3 sagittal planes 2 symmetrically arranged 2 to 6 side inlet channel 1b.
As shown in Figure 1; Fine mist spray head comprises water inlet 1, hybrid chamber 3 and delivery port 4; Water inlet 1 comprises center inlet channel 1a and side inlet channel 1b; Side inlet channel 1b axial line and hybrid chamber 3 one RADIALs intersect vertically, and side inlet channel 1b axial line and hybrid chamber 3 sagittal planes 2 have less than the angle a of 90 degree greater than 0 degree, and said hybrid chamber 3 RADIALs are radius or the diameter lines that pass the center of circle on hybrid chamber 3 sagittal planes 2; A plurality of side inlet channel 1b are positioned at center inlet channel 1a footpath towards periphery and be symmetrical set, and the distance of side inlet channel 1b and center inlet channel 1a is less than hybrid chamber 3 radius radially.
This routine side inlet channel 1b axial line and hybrid chamber 3 sagittal planes 2 angle a are 60 degree.
The axial line of lateral intake road 1b is projected in and is 45 degree angles on the shower nozzle cross centre line plane.
The distance of side inlet channel 1b and center inlet channel 1a be hybrid chamber 3 radially radius 1/2nd.
Inlet channel 1a periphery is symmetrical set side inlet channel 1b to the utility model at the center; Side inlet channel 1b and center inlet channel 1a are communicated with hybrid chamber 3 in same sagittal plane 2; Center inlet channel 1a axis normal is in the sagittal plane 2; A plurality of side inlet channel 1b are symmetricly set on center inlet channel 1a periphery; Each side inlet channel 1b axis has identical angle a to form the consistent water inlet of rotation direction with sagittal plane 2, and side inlet channel 1b axis is intake with vertical the formation along the tangential of hybrid chamber 3 axial cylinders of RADIAL that intersect sagittal plane 2.
Above-mentioned waterfog head has center inlet channel 1a and the side inlet channel 1b that becomes certain degree with center inlet channel 1a axis; Side inlet channel 1b angle equates that rotation direction is consistent; Side inlet channel 1b eddy flow mixes with the direct projection stream that produces axial kinetic energy mutually; The intense mixing of center inlet channel 1a direct projection stream and side inlet channel 1b eddy flow forms swirling motion in hybrid chamber 3; Under the promotion of the axial kinetic energy of center inlet channel 1a, mix eddy flow and form thin water smoke from the delivery port ejection of shower nozzle with atmosphere generation strong collision at last.It is minimum that said structure makes that when keeping strong eddy flow the axial momentum loss of side water channel drops to, because the import current do not have turn sharp, reduced entrance loss with direct projection-rotational flow atomized spray injector comparison, practiced thrift energy, makes the eddy flow in eddy flow chamber mix better.
In conjunction with Fig. 2 to Fig. 6.
As shown in the figure; Fig. 2 adopts a kind of structural section sketch map of the utility model nozzle, and Fig. 3 is Fig. 2 inlet end face structural representation, and Fig. 4 adopts the utility model nozzle water inlet structure sketch map; Fig. 5 is Fig. 4 BB cross section structure sketch map, and Fig. 6 is Fig. 4 AA cross section structure sketch map.This example is combined to form the fine mist spray head of Fig. 1 fluid flow fields structure through each modular construction.
As shown in Figure 2, shower nozzle comprises the nozzle assembly that constitutes nozzle delivery port 4, the water inlet assembly that constitutes water inlet 1 and constitutes the chamber assembly of hybrid chamber 3 jointly with nozzle assembly, water inlet assembly.Nozzle assembly, water inlet assembly and chamber assembly install and fix through the helicitic texture of coupling, can increase rubber seal in the joint portion for preventing seepage.Each assembly is irregular cylinder, its inner Fig. 1 fluid flow fields structure that forms of combination back.
This example realizes that eddy flow fluid flow fields structure is that the water inlet assembly is provided with side inlet channel 1b, and like Fig. 4, Fig. 5 and shown in Figure 6, water inlet assembly and chamber assembly install and fix through the helicitic texture of coupling; Water inlet assembly cylinder axial centre has through hole, i.e. center inlet channel 1a is at the center inlet channel 1a arranged outside side inlet channel 1b of water inlet assembly; This example is symmetrical set two; Side inlet channel 1b runs through the into axial through hole of water assembly, but is obliquely installed, and arrow is an incline direction among the figure.
Position, diameter, angle of inclination through changing center inlet channel 1a on the water inlet assembly and/or side inlet channel 1b, quantity etc. is set realizes that the eddy flow in different eddy flow chambeies mixes.This example adopts fine mist spray head to comprise water inlet 1, hybrid chamber 3 and delivery port 4; Water inlet 1 comprises center inlet channel 1a and side inlet channel 1b; Side inlet channel 1b axial line and hybrid chamber 3 one RADIALs intersect vertically, and there is the angle a of 60 degree side inlet channel 1b axial line and hybrid chamber 3 sagittal planes 2; 2 side inlet channel 1b are positioned at center inlet channel 1a footpath towards periphery and be symmetrical set, the distance of side inlet channel 1b and center inlet channel 1a equal hybrid chamber 3 radially radius 1/2nd.
The utility model adopts FLUNET flow analysis software; Numerical simulation analysis has been carried out in jet field, the utility model structure water mist fire-extinguishing nozzle inside and outside; Analyzed the atomization of shower nozzle from the inside and outside jet field prediction of shower nozzle; Structural parameters have carried out comparative analysis to the influence factor of the atomization of shower nozzle, have confirmed the structure of fine mist spray head through import center inlet channel 1a (size 1,1.5,2mm) side inlet channel 1b (size 1,1.5,2mm) delivery port 4 (size 1.2,1.6,2mm) optimum experimental.And the atomization of the utility model structure fine mist spray head, fire extinguishing effect tested.
The main contents of shower nozzle atomization test: the atomizing angle of shower nozzle, discharge characteristic coefficient, mist particle diameter and distribution thereof and droplet eject momentum.In these parameters, discharge characteristic, mist particle diameter and droplet eject momentum are main performance parameters, and the extinguishing property of fine mist spray head is had the greatest impact.
Experimental result such as following table:
Experiment shows and the utlity model has following advantage: 1. have bigger axial momentum; Practiced thrift energy; Under 3Mpa pressure, apart from 1 meter experiment test of shower nozzle outlet, the droplet maximum axial speed of its thin water smoke is 20.1402m/s; Make droplet penetrate space, the scene of a fire to greatest extent, realize degree of depth fire extinguishing; The mist particle diameter of shower nozzle is in the 55-108 mu m range.2. the radial momentum that has kept thin water smoke simultaneously, does the radial velocity of thin water smoke do? M/S increases the atomizing angle of thin water smoke, enlarges the fire extinguishing scope of thin water smoke, and experiment test atomizing cone angle is not less than 50 degree under 3Mpa; 3. volume is little, and simple in structure, easy to process, low cost of manufacture can be produced in batches.Experiment is illustrated in presses atomization, the momentum indicator of scope shower nozzle all better among 1.2Mpa ≦ P ≦ 3.5 Mpa; Fire there is the ability of putting out preferably, the utility model shower nozzle is loaded on the hydraulic giant under the 3Mpa pressure condition, make category-B fire 8B fire extinguishing experiment test; Add foam and do not add under two kinds of situation of foam; Its attack time is 15-47 second, makes category-A fire 1A fire extinguishing experiment test, adds that its attack time is 210 seconds under the foam situation.
Above-mentioned category-A fire is to make an experiment by GB4351.1-2005 usefulness 1A type test model; The 1A test model is 400*400*100mm; The square grillage of 72 batten compositions is placed on the steelframe, is all undertaken by GB4351.1-2005 with 1.1L gasoline basin ignition test model, condition, step, evaluation.The category-B fire is to make an experiment by GB4351.1-2005 usefulness 8B type test model; The 8B test model is that test oil tray diameter is that 570mm, the degree of depth are 150mm; The water that adds an amount of degree of depth; Adding 8L gasoline then, pre-burning 60s) test model, condition, step, evaluation all undertake by GB4351.1-2005.
Claims (10)
1. a fine mist spray head comprises water inlet (1), hybrid chamber (3) and delivery port (4), and water inlet (1) comprises center inlet channel (1a) and side inlet channel (1b), it is characterized in that:
Side inlet channel (1b) axial line and hybrid chamber (3) one RADIALs intersect vertically, and side inlet channel (1b) axial line and hybrid chamber (3) sagittal plane (2) have less than the angle (a) of 90 degree greater than 0 degree;
A plurality of side inlet channels (1b) are positioned at center inlet channel (1a) footpath towards periphery and be symmetrical set, and the distance of side inlet channel (1b) and center inlet channel (1a) is less than hybrid chamber (3) radius radially.
2. fine mist spray head according to claim 1 is characterized in that: said side inlet channel (1b) is positioned at center inlet channel (1a) footpath towards periphery and be symmetrical set 2 to 6.
3. fine mist spray head according to claim 2 is characterized in that: said side inlet channel (1b) is positioned at center inlet channel (1a) footpath towards periphery and be symmetrical set 2.
4. fine mist spray head according to claim 1 is characterized in that: said side inlet channel (1b) axial line and hybrid chamber (3) sagittal plane (2) angle (a) are 60 degree.
5. fine mist spray head according to claim 1 is characterized in that: the axial line of lateral intake road (1b) is projected in and is 45 degree angles on the shower nozzle cross centre line plane.
6. fine mist spray head according to claim 1 is characterized in that: said side inlet channel (1b) diameter is more than or equal to center inlet channel (1a) diameter.
7. fine mist spray head according to claim 6 is characterized in that: said side inlet channel (1b) diameter is two times of center inlet channel (1a) diameter.
8. according to each described fine mist spray head of claim 1 to 7, it is characterized in that: the distance of side inlet channel (1b) and center inlet channel (1a) be hybrid chamber (3) radially radius 1/2nd.
9. fine mist spray head according to claim 8 is characterized in that: said delivery port (4) and center inlet channel (1a) are on same axis.
10. fine mist spray head according to claim 8 is characterized in that: it is a cone that said hybrid chamber (3) is connected end shape with delivery port (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220202109XU CN202516208U (en) | 2012-05-08 | 2012-05-08 | Water mist spray head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220202109XU CN202516208U (en) | 2012-05-08 | 2012-05-08 | Water mist spray head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202516208U true CN202516208U (en) | 2012-11-07 |
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ID=47099181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220202109XU Withdrawn - After Issue CN202516208U (en) | 2012-05-08 | 2012-05-08 | Water mist spray head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202516208U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698396A (en) * | 2012-05-08 | 2012-10-03 | 西华大学 | Water mist sprayer |
-
2012
- 2012-05-08 CN CN201220202109XU patent/CN202516208U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698396A (en) * | 2012-05-08 | 2012-10-03 | 西华大学 | Water mist sprayer |
| CN102698396B (en) * | 2012-05-08 | 2014-04-30 | 西华大学 | Water mist sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140430 |
|
| RGAV | Abandon patent right to avoid regrant |