CN104014096A - Direct-through double-helix convergent type water pressure atomizing spray nozzle - Google Patents
Direct-through double-helix convergent type water pressure atomizing spray nozzle Download PDFInfo
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- CN104014096A CN104014096A CN201410278373.5A CN201410278373A CN104014096A CN 104014096 A CN104014096 A CN 104014096A CN 201410278373 A CN201410278373 A CN 201410278373A CN 104014096 A CN104014096 A CN 104014096A
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Abstract
The invention discloses a direct-through double-helix convergent type water pressure atomizing spray nozzle. The direct-through double-helix convergent type water pressure atomizing spray nozzle comprises a spray nozzle body (1), wherein an inner spiral pushing rod (3) and an outer spiral pushing rod (2) are arranged in the spray nozzle body (1); a spray nozzle ejector rod (10) is further connected with a water inlet of the spray nozzle body (1); the inner spiral pushing rod (3) and the outer spiral pushing rod (2) are coaxially and fixedly connected with each other; a spiral groove in the outer surface of the inner spiral pushing rod (3) is matched with a spiral groove in the inner surface of the outer spiral pushing rod (2) to form a complete round-mouth spiral convergent water path (4); the outer surface of the outer spiral pushing rod (2) is in seamless fitting with the inner surface of the spray nozzle body (1); the bottom surface of the cone part of the outer spiral pushing rod (2) and the bottom surface of the cone part of the inner surface of the spray nozzle body (1) are on the same plane. The direct-through double-helix convergent type water pressure atomizing spray nozzle disclosed by the invention has the advantages of being small in size, light in weight, simple in structure and simple to install. Water at the outlet flows quickly and has very high tangential speed, so that an atomizing range and atomizing capacity are easy to increase. The direct-through double-helix convergent type water pressure atomizing spray nozzle disclosed by the invention can be applicable to a fire extinguishing apparatus carried in front of a water-pressure self-servo snakelike fire-extinguishing and disaster-relief robot.
Description
Technical field
The present invention relates to hydraulic nozzle technical field, specifically a kind of mesolow hydraulic nozzle structure.
Background technology
Along with the fast development of modern science and technology, people have also more and more paid close attention to earth environment that we depend on for existence and natural resources in meeting basic living demand.In fire extinguishing procedure, do not stay the superior functions such as residue and vestiges, blow-off velocity are fast, the long term storage of chemically stable energy owing to breathing out dragon (Halon) extinguishing chemical, be once once widely used in eighties of last century.But it belongs to alkyl halide series extinguishing chemical, can destroy greatly the ozone layer in atmosphere, cause the various problems such as greenhouse effects, serious harm the mankind's health.Within 1987, united nations environment protection pact Montreal Protocol on Substances that Deplete the Ozone Layer requires various countries to stop using alkyl halide series extinguishing chemical, finds the substitute of halon fire agent.Fine water mist fire-extinguishing system, because of features such as it are free from environmental pollution, fire-fighting efficiency is high, water consumption is low, is regarded as the ideal substitute of halon fire agent, and each state is all in positive expansion research, and it has a extensive future.
Gong Yong army etc. has developed a kind of multiinjector combined high-voltage fine mist spray head (" combustion science and technology ", in December, 2010, the 16th the 6th phase of volume, " multiinjector combined type fine mist spray head oil tray fire-extinguishing test and analysis "), a kind of novel three tangential slot type high-pressure fine water mist nozzles are designed, and this nozzle is arranged on Combined nozzle body, form multiinjector fine mist spray head.Although this structure is simple, whole accelerated passage is too short, and namely acceleration is abundant not enough, tangential velocity is especially only provided, but has not accelerated, and is difficult to enough protection domains, only can realize atomization by increasing pressure.
Yang Lijun etc. have proposed to ensure the swirl atomizer method for designing of fogdrop diameter in " development of naval vessel high-pressure fine water mist fire-extinguishing system shower nozzle " (" Marine engineering ", total the 30th volume, the 3rd phase in 2008), and fine mist spray head has wider working range.But this structure speed in the axial direction is only provided by the current of lower pressure, so axial velocity is too small.
Zhou Hua etc. propose double atomization and make droplet more even in " development of New Water Mist Spray Bead for Fire Suppression " (" hydraulic pressure and pneumatic ", the 7th phase in 2006,62 pages), and atomization cone angle and spraying radius of protection obviously increase.But this structural disadvantages is only to have gone the disturbance to current by sudden change, and the tangential velocity of water outlet is inadequate, so in atomization, there are many restrictions.
Summary of the invention
The object of the invention is to design the straight-through double helix convergence type hydraulic atomizing nozzle that a kind of volume is little, easy for installation, atomization is good.
A kind of straight-through double helix convergence type hydraulic atomizing nozzle, comprises nozzle body 1, is provided with inside spin cone bar 3, external spiral cone bar 2 in described nozzle body 1, and nozzle body 1 water inlet place is also connected with nozzle push rod 10; Inside spin cone bar 3 is coaxially fixedly connected with external spiral cone bar 2, and the helicla flute of inside spin cone bar 3 outer surfaces matches with the helicla flute of external spiral cone bar 2 inner surfaces and forms a complete round mouth spiral convergence water channel 4; External spiral cone bar 2 outer surfaces and nozzle body 1 inner surface are seamless applying, and the bottom surface of the bottom surface of external spiral cone bar 2 conical sections and the conical section of nozzle body 1 inner surface is in the same plane.
Described nozzle push rod 10 is connected with nozzle body 1 by two groups of nuts and bolts, nozzle push rod 10 is with two top pin, described two top pin snap in the groove on inside spin cone bar 3 and external spiral cone bar 2 column part bottom surfaces, neither move also and do not rotate around axis along axis for fixing inside spin cone bar 3 and external spiral cone bar 2.
Described inside spin cone bar 3 comprises column part and conical section, and inside spin cone bar 3 outer surfaces are provided with level and smooth round mouth double helix convergence tank from column part to conical section tip, and inside spin cone bar 3 centers offer central jet through hole 8.
Described external spiral cone bar 2 comprises column part and conical section, and external spiral cone bar 2 inner surfaces are provided with level and smooth round mouth double helix convergence tank from column part to conical section tip.
The water outlet of described nozzle body 1 is provided with internal taper hole 5, nozzle bore 7 and outer taper hole 6 from the inside to the outside successively.
The advantage of the straight-through double helix convergence type hydraulic atomizing nozzle of the present invention is: volume is little, lightweight, simple in structure, installation is simple.Owing to adopting through type taper round mouth double helix convergence water channel, make out the speed of saliva fast, and with very large tangential velocity, be easy to increase range of atomized flow and atomization ability.Exit of the present invention adopts outer taper hole, makes, in water velocity expansion outward again, to produce the water droplets that meets fire extinguishing effect.The present invention adopts double atomization, and bore sudden change increases the disturbance to current, and atomization cone angle and spraying radius of protection are obviously increased.The present invention increases employing central jet hole, and taper hole is that three strands of current meets can be given spiral water flow thrust outside, can increase the effluxvelocity that saliva.Through checking, the nebulisation time of nozzle of the present invention is extremely short, and range of atomized flow also meets the atomization requirement of the extinguishing device that hydraulic pressure carries from servo snakelike fire extinguishing Disaster Relief Robot above.
Brief description of the drawings
Fig. 1 is the structural representation of the straight-through double helix convergence type hydraulic atomizing nozzle of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Fig. 3 is the main TV structure schematic diagram of inside spin cone bar.
Fig. 4 is the left TV structure schematic diagram of inside spin cone bar.
Fig. 5 is the main TV structure schematic diagram of nozzle push rod.
Fig. 6 is the left TV structure schematic diagram of nozzle push rod.
Fig. 7 is the main TV structure schematic diagram of nozzle body.
Fig. 8 is the left TV structure schematic diagram of nozzle body.
Fig. 9 is the main TV structure schematic diagram of external spiral cone bar.
Figure 10 is the left TV structure schematic diagram of external spiral cone bar.
In figure, 1 is nozzle body, and 2 is external spiral cone bar, and 3 is inside spin cone bar, and 4 is spiral convergence water channel, and 5 is internal taper hole, and 6 is outer taper hole, and 7 is nozzle bore, jet via-hole centered by 8, and 9 is nuts and bolt, 10 is nozzle push rod.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described: as Figure 1-10 shows, a kind of straight-through double helix convergence type hydraulic atomizing nozzle, comprises inside spin cone bar 3, external spiral cone bar 2, nozzle body 1, nozzle push rod 10 4 part compositions.
Inside spin cone bar 3 is fixedly connected with external spiral cone bar 2 coaxial lines, and the round mouth spiral convergence tank Match merging of inside spin cone bar 3 and external spiral cone bar 2 is complete circular double helix convergence water channel 4.The external spiral cone male cone (strobilus masculinus) of bar 2 and the inner conical surface of nozzle body 1 are bonded to each other, the external spiral cone external cylindrical surface of column part of bar 2 and the inner cylinder face in the cylinder duct of nozzle body 1 are bonded to each other, and the bottom surface of the external spiral cone bottom surface of conical section of bar 2 and the conical section of the inner surface of nozzle body 1 is in the same plane.Two top pin of nozzle push rod 10 snap in the groove on inside spin cone bar 3 and external spiral cone bar 2 cylinder bottom surfaces, make the complete laminating of spiral convergence water channel 4, and make inside spin cone bar 3 and external spiral cone bar 2 not move and not rotate around axis along axis.Nozzle push rod 10 is fixed on nozzle body 1 by two bolt and nut groups.Left side is entrance port side.
As shown in Figure 2, inside spin cone bar 3 comprises column part and conical section, and inside spin cone bar 3 outer surfaces are provided with level and smooth round mouth double helix convergence tank from column part to conical section tip.Inside spin Zhui Gan center is provided with central jet through hole 8.
As shown in Figure 3, nozzle push rod 10 has two top pin to make inside spin cone bar 3 and external spiral cone bar 2 aim at laminating, and makes inside spin cone bar 3 and external spiral cone bar 2 not move and not rotate around axis along axis.There is the ring flange with two bolts hole on right side.
As shown in Figure 4, the inner duct of nozzle body 1 is made up of successively cylinder duct (being spiral convergence water channel 4), inner cone duct, nozzle duct and outer cone duct.There is the ring flange with two bolts hole in left side (entrance port side).
As shown in Figure 5, external spiral cone bar 2 comprises column part and conical section, and external spiral cone bar 2 inner surfaces most advanced and sophisticated level and smooth round mouth double helix that is provided with from column part to conical section is restrained tank.
Described inside spin cone bar 3 and external spiral cone bar 2 can entirety be processed under advanced machining technology, are combined into screw conic bar.
The present invention is directed to the extinguishing device that hydraulic pressure carries from servo snakelike fire extinguishing Disaster Relief Robot above, cube little, lightweight, simple in structure, easy for installation, atomizing effect is good; The quality of mist-generating nozzle atomization directly affects its fire extinguishing effect, the not only using water wisely but also can fast and effeciently put out a fire of good atomization characteristics, because hydraulic pressure should be driven and be emitted again mist fire-fighting by hydraulic pressure from servo snakelike fire extinguishing Disaster Relief Robot, therefore hydraulic pressure can be too not high in the time of work, therefore the present invention adopts direct projection eddy flow convergence type spray nozzle device to realize the fire extinguishing of mesolow atomization of water current.
Adopt FLUENT software to carry out numbered analog simulation to designed atomizer, analyzing after the speed in nozzle interior flow field, pressure, vector velocity, motion trace, structural design to nozzle has proposed prioritization scheme, and the nozzle after optimizing is carried out to interior flow field analysis.The atomization of current is the interactions due to air and current, so outside emulation must be considered the existence of air.Adopt three-dimensional VOF (volume of fluid, fluid volume function) two phase flow FLUENT to simulate more really the process of current atomization in air of nozzle ejaculation.The initial pressure that enters water is 5Mpa, and obtains drawing a conclusion:
1) water velocity of atomizer is in jet hole place maximum, and in the time that atomizer has central jet hole and has spiral channel, the maximal rate at jet hole place reaches 56.83m/s; When atomizer does not have central jet hole, while only having spiral channel, the maximal rate at jet hole place reaches 50.82m/s.The speed at jet hole place is larger, and the effect of nozzle atomization is better, visible, and there is positive effect in central jet hole to the atomization of nozzle.
2) current are entering before direct jet hole and spiral channel, water velocity slowly increases, entering after direct jet hole and spiral channel, speed has comparatively significantly increase, enter after direct jet hole and spiral channel, under the effect of spiral centrifugal, water velocity continues to increase, enter into water velocity after jet hole and sharply increase again, reach maximum from jet hole out time.
3) current are to enter trace before central jet hole and spiral channel more chaotic, and this explanation has produced turbulent flow in this part, and spiral channel porch is more serious than the turbulent phenomenon in porch, central jet hole; After current enter central jet hole and spiral channel, trace is smoother, shows that current are along water channel smooth flow, do not have turbulent generation.
4) high-velocity flow is injected the drag effect that can be subject to air in air, and current can make ambient air produce rough air, and constantly air are involved in current, makes the broken atomization of current, forms tiny water droplet.
5) nozzle atomization of water current its essence is at jet hole and forms a hollow air cone, and along jet direction, in current, the volume fraction of air slowly increases, and atomization is also more abundant.
Claims (5)
1. (1) a straight-through double helix convergence type hydraulic atomizing nozzle, comprise nozzle body, described nozzle body be provided with in (1) inside spin cone bar (3), external spiral cone bar (2), (10) nozzle body (1) water inlet place is also connected with nozzle push rod; It is characterized in that: (2) (3) inside spin cone bar be coaxially fixedly connected with external spiral cone bar, inside spin cone bar (3) outer surface helicla flute and external spiral cone bar (2) the helicla flute of inner surface match complete round mouth spiral convergence water channel of formation (4); External spiral cone bar (2) outer surface (1) inner surface is seamless applying with nozzle body, external spiral bore bar (2) the bottom surface of conical section and nozzle body (1) the bottom surface of the conical section of inner surface is in the same plane.
2. straight-through double helix convergence type hydraulic atomizing nozzle as claimed in claim 1, it is characterized in that: (1) (10) described nozzle push rod be connected with nozzle body by two groups of nuts and bolts, nozzle push rod is (10) with two top pin, described two top pin snap in inside spin cone bar and (3), (3) (2) neither move also and do not rotate around axis along axis with external spiral cone bar for fixing inside spin cone bar (2) in the groove on column part bottom surface with external spiral cone bar.
3. straight-through double helix convergence type hydraulic atomizing nozzle as claimed in claim 1, it is characterized in that: (3) described inside spin cone bar comprises column part and conical section, inside spin cone bar (3) outer surface is provided with level and smooth round mouth double helix convergence tank from column part to conical section tip, (8) inside spin Zhui Gan⑶ center offers central jet through hole.
4. straight-through double helix convergence type hydraulic atomizing nozzle as claimed in claim 1, it is characterized in that: (2) described external spiral cone bar comprises column part and conical section, external spiral cone bar (2) inner surface is provided with level and smooth round mouth double helix convergence tank from column part to conical section tip.
5. straight-through double helix convergence type hydraulic atomizing nozzle as claimed in claim 1, is characterized in that: described nozzle body water outlet be (1) provided with successively from the inside to the outside internal taper hole (5), nozzle bore (7) with outer taper hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410278373.5A CN104014096B (en) | 2014-06-20 | 2014-06-20 | A kind of straight-through double helix convergence type hydraulic atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410278373.5A CN104014096B (en) | 2014-06-20 | 2014-06-20 | A kind of straight-through double helix convergence type hydraulic atomizing nozzle |
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| Publication Number | Publication Date |
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| CN104014096A true CN104014096A (en) | 2014-09-03 |
| CN104014096B CN104014096B (en) | 2016-05-25 |
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| CN201410278373.5A Expired - Fee Related CN104014096B (en) | 2014-06-20 | 2014-06-20 | A kind of straight-through double helix convergence type hydraulic atomizing nozzle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390345A (en) * | 2016-11-29 | 2017-02-15 | 安徽理工大学 | Safe and efficient dedusting, cooling and fire extinguishing multifunctional system |
| CN109372526A (en) * | 2018-11-12 | 2019-02-22 | 中铁工程装备集团有限公司 | The novel balancing earth-pressure shielding machine of foreign matter obstacle can be passed through |
| CN109576455A (en) * | 2018-12-21 | 2019-04-05 | 江苏甬金金属科技有限公司 | A kind of stainless steel band heat treatment mist cooling system |
| CN114433001A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Series high-speed spinning flow gas-liquid mass transfer system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106390345A (en) * | 2016-11-29 | 2017-02-15 | 安徽理工大学 | Safe and efficient dedusting, cooling and fire extinguishing multifunctional system |
| CN109372526A (en) * | 2018-11-12 | 2019-02-22 | 中铁工程装备集团有限公司 | The novel balancing earth-pressure shielding machine of foreign matter obstacle can be passed through |
| CN109576455A (en) * | 2018-12-21 | 2019-04-05 | 江苏甬金金属科技有限公司 | A kind of stainless steel band heat treatment mist cooling system |
| CN114433001A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Series high-speed spinning flow gas-liquid mass transfer system |
| CN114433001B (en) * | 2020-10-31 | 2023-10-10 | 中国石油化工股份有限公司 | Tandem type high-speed spin flow gas-liquid mass transfer system |
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Application publication date: 20140903 Assignee: Shenzhen Beiteer Electromechanical Co., Ltd. Assignor: Wuhan University of Science and Technology Contract record no.: 2016440020088 Denomination of invention: Direct-through double-helix convergent type water pressure atomizing spray nozzle Granted publication date: 20160525 License type: Exclusive License Record date: 20160919 |
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Granted publication date: 20160525 Termination date: 20170620 |