CN106925453A - A kind of secondary gas-liquid two-phase flow static nozzle - Google Patents

Abstract

The present invention relates to a kind of secondary gas-liquid two-phase flow static nozzle, belong to spraying nozzle technical field.The shower nozzle includes support and sprinkler cap, and support is constituted by woven hose and by the ring of web disjunctor；Sprinkler cap is constituted by capped pipe and by shrinking the bleed pipe of cone disjunctor；Spiral nozzle is fixed by lock bracket in sprinkler cap, spiral nozzle to helical blade and air vent from constituting before central tube, wind disk, one group；In the inner insertion woven hose of central tube, the fixed atomizer of outer end inserting of central tube, the outer end of atomizer is stretched into bleed pipe；The contraction cone of sprinkler cap has the damper of adjustable air outlet size with air outlet and kink.The present invention realizes super-low capacity quantization and the fine of droplet of spraying in the way of secondary gas-liquid two-phase flow is atomized, and spraying penetration power is stronger, and spray amount and mist droplet particle size can be electrodeless controllable, and can conscientiously meet different pest and disease damages prevents and treats demand.

Description

A kind of secondary gas-liquid two-phase flow static nozzle

Technical field

The present invention relates to the secondary gas-liquid two-phase flow static nozzle of a kind of atomizer, especially a kind of ultra-low volume, belong to Spraying nozzle technical field.

Background technology

Electrostatic spray makes pesticide droplet charged by different modes such as contact, corona, sensings, and in the presence of electric field force To Target crops or target organismses directed movement, transmission efficient to target and the deposition of pesticide droplet are realized.Especially, charged droplets " the outflanking effect " having is favorably improved deposition and coverage rate of the pesticide droplet in concealment parts such as crop blade backs, so as to carry Prevention and control of plant diseases, pest control effect high and pesticide efficacy.

The charge-mass ratio of droplet is the key factor for influenceing electrostatic spray effect, and it reflects the electricity that unit mass droplet has Amount.Charge-mass ratio is bigger, illustrates that droplet charging effect is better, is more conducive to droplet in the presence of electric field force to target（Target crops Or target organismses）Transmission and deposition.There are some researches show low mist flow and secondary air amount high can obtain lotus matter higher Than mist droplet particle size is inversely proportional with charge-mass ratio.Relative to the atomizing types such as electro-hydrodynamic atomization, centrifugal atomizing, pneumatic atomization, gas-liquid two-phase Stream atomization is more conducive to form ultra-fine droplet, while the air velocity of the atomizing type can drive droplet velocities, make droplet have compared with Big mist momentum, so that not only increase penetrability of the droplet in crop canopies, while for droplet has been provided to long-range conveying Sharp condition.

Retrieval understands that the Chinese patent application of Application No. 201010136395.X discloses a kind of sprayer-duster low amounts Shower nozzle, with low amounts jet pipe, the woven hose upper end installation connecting element of low amounts jet pipe, connector connection low amounts nozzle, outside connector Wall installs impeller by bearing, and blade is formed with impeller, and cap of spraying nozzle is installed in the impeller upper end, and cap of spraying nozzle upper edge is formed with water dumping Hole, the inner chamber of the cap of spraying nozzle is connected with the apopore and woven hose of water dumping hole and low amounts nozzle.The liquid of this shower nozzle passes through Cap of spraying nozzle inwall is impinged upon tentatively to be broken up, expanded laterally from cap of spraying nozzle lumen centers in the presence of centrifugal force and wall attachment effect Dissipate and thrown away from the shunting of water dumping hole, the last droplet being sprayed onto on crops under triple role such as further smashed by high velocity air Grain is very small, therefore atomizing effect is good.However, the atomization mechanism of the shower nozzle is to clash into broken+pneumatic atomization, i.e., pass through medicine first Liquid and the effect of impact of cap of spraying nozzle inwall, make liquid be broken into larger droplet, then are acted on by strength, make the further mist of droplet Chemical conversion more fine mist, though fine mist can be obtained, the spray amount and mist droplet particle size for being formed are relatively-stationary, it is impossible to met Different pest and disease damages prevent and treat demand.

Additionally, the Chinese patent of Application No. 201020135491.8 discloses a kind of ultra-low volume/low-gallonage spraying combination Shower nozzle, including the spout assembly that spout is connected into is buckled in by honeycomb screen, sprayer body, liquid connecting tube, spreader, fluted disc, by Solid shafting, bearing, bearing block, impeller, impeller locknut are sequentially connected the rotary blade component of composition;Honeycomb screen is buckled in spout On, spout is flexibly connected with sprayer body, and the inwall of sprayer body has brace rod to fix spreader, and the bottom of spreader is connected with liquid Pipe is connected, and the hypomere of spreader has fluid hole, hypomere upper end fixed installation fluted disc, hollow cone of the solid shaft assembling in spreader epimere In hole.During work, it is low capacity shower nozzle to install spout and honeycomb screen, and it is ULV nozzle to remove spout and honeycomb screen.However, its Atomization mechanism is substantially pneumatic atomization+shock and crushes, i.e., make liquid along spreader outer surface by action of high-speed airflow first Form very thin liquid film, be blown to fluted disc edge, liquid forms brin on crown, then cut off by high velocity air to be formed compared with Big droplet, is then further broken up into droplet more tiny by big droplet and the effect of impact of the impeller of rotation at a high speed again Droplet, its spray amount and mist droplet particle size regulation are changed by nozzle structure to be realized, and only 2 kinds spray amounts and mist droplet particle size are big Small optional, be still difficult to meet different pest and disease damages prevents and treats demand.

Further, the Chinese patent of Application No. 201310187626.3 discloses a kind of duckbilled wind spraying aid type combined sprinkler, bag Include duckbilled air outlet, deep bead, deflector, shower nozzle, woven hose and air inlet.High pressure liquid enters shower nozzle, shower nozzle by woven hose It is fixed on duckbilled air outlet outside；The high velocity air of blower fan blowout enters duckbilled by air inlet, makes air-flow uniform through deflector Blown out by duckbilled air outlet, the liquid stream sprayed with shower nozzle mixes；Deep bead is fixed on duckbilled air outlet outside, reduces natural wind pair The influence of liquid stream；Liquid is carried out secondary-atomizing by the invention using the air-flow that duckbilled air outlet blows out, and forms thinner droplet.Its It is electro-hydrodynamic atomization+pneumatic atomization that atomization mechanism is actual, i.e., make medical liquid atomizing into larger mist by one group of fan nozzle first Drop, then droplet is further atomized into more fine mist by air-flow.Because there is droplet spectrum width in electro-hydrodynamic atomization（I.e. droplet is thick Thin uneven, big droplet is easy to run off, the easy drift of small droplet, so as to while pesticide efficacy is reduced, cause environmental pollution） Shortcoming, and droplet volume medium depends mainly on the size of selected fan nozzle model, thus when sector After fog spray head model is selected, it is relatively-stationary to be atomized the droplet volume medium for being formed, it is impossible to according to controlling object not Change with requiring.

The content of the invention

It is an object of the invention to：For the shortcoming that above-mentioned prior art is present, propose that a kind of not only droplet is more tiny Even, penetration power is stronger, and spray amount and mist droplet particle size can electrodeless controllable secondary gas-liquid two-phase flow static nozzle, with meet Different pest and disease damages prevent and treat demand.

In order to reach object above, secondary gas-liquid two-phase flow static nozzle basic technical scheme of the invention is：Including logical Support and sprinkler cap of the simultaneously cap pressure holding at fluid delivery tube end are crossed, the support is by the woven hose in center and by radial web Constituted with the ring that woven hose is connected as a single entity, fixed by simultaneously cap pressure holding；The sprinkler cap is by capped pipe and by shrinking cone and cap The bleed pipe with diffusing opening that pipe is connected as a single entity is constituted, by simultaneously cap elasticity pressure holding；Spiral shell is fixed by lock bracket in the sprinkler cap Churning mouth, the spiral nozzle by central tube, the central tube radially outward from wind disk, positioned at the wind disk outer face One group before between helical blade and the wind disk adjoining spiral blade air vent constitute；The inner of the central tube Insert in the woven hose, and with radial direction inlet opening, the fixed atomizer of outer end inserting of the central tube, the atomization spray Stretch into the bleed pipe outer end of mouth；The contraction cone of the sprinkler cap has air outlet and kink has adjustable air outlet size Damper.

Further, the damper have position air door corresponding with the air outlet and with the bleed pipe phase The casing section matched somebody with somebody, has the regulating tank for installing fastener in described sleeve pipe section.

Further, the lock bracket by screwed with sprinkler cap external screw thread circle, from external screw thread circle radial direction undergauge and axially prolong The one group of connecting plate stretched and the centring ring composition for passing through connecting plate disjunctor.

Further, the inner of the capped pipe fills with flange is radially extended between the flange and the simultaneously seam of cap outer end There is spring.

Further, the contraction cone of the sprinkler cap has the kidney slot air outlet of circumferentially extending.

Further, one end of the ring have radially extend rib.

During work, when air-flow enters the conical inboard wall for acting on sprinkler cap contraction cone, elastic press force can be overcome so that Sprinkler cap produces axial displacement together with lock bracket, spiral nozzle, atomizer and damper, and liquid is able to by entering Fluid apertures enters the central tube of spiral nozzle, and then is sprayed by atomizer.At the same time, the gas of head cartridge and lock bracket is flowed through Stream is classified into two-way, to distribution helical blade before being blowed to through the air vent on spiral nozzle all the way, so that axial flow becomes It is the eddy airstream of the exit region of atomizer.Because the central pressure of eddy airstream is minimum, hence in so that being transported to atomization The liquid of jet expansion sprays at a high speed under suction, and is clashed into eddy airstream, makes liquid through first time gas-liquid two Mutually stream atomization is preliminary into mist drop, is to be atomized into ultra-fine aerosol drop for the second time to lay the foundation；Another road air-flow then passes through spiral Annular region between the excircle of nozzle and the capped pipe inwall of sprinkler cap, shrinks at the conical wall of cone because of mistake in sprinkler cap Stream interface reduces so that the flow velocity increase of air-flow, forms high velocity air, and produces low pressure under Venturi effect effect, so as to produce Raw suction-operated, makes to occur to clash into the high velocity air in the ejection pipeline section of sprinkler cap through the droplet group after primary atomization, mixes Close, realize second gas-liquid two-phase flow atomization, the mist drop after first time is atomized is atomized into ultra-fine aerosol drop, and by height Fast air-flow increases droplet initial velocity, and having droplet can subsequently enter the diffusion of bleed pipe to the relatively dense fog momentum of long-range conveying Mouthful, disperseed with certain cone angle, and sprayed under airflow function to long-range conveying.

Brief description of the drawings

The present invention is further illustrated below in conjunction with the accompanying drawings.

Fig. 1 is the dimensional decomposition structure diagram of one embodiment of the invention.

Fig. 2 is the sectional view of Fig. 1 embodiments.

Fig. 3 is the partial enlarged drawing of off-mode at the A of Fig. 2.

Fig. 4 is the partial enlarged drawing of spraying state at the A of Fig. 2.

Fig. 5 is the spiral nozzle structural representation of Fig. 1 embodiments.

Fig. 6 is the side view of Fig. 5.

In figure：Sprinkler cap 14-1, and cap 14-2, damper 14-3, support 14-4, pad 14-5, lock bracket 14-6, spiral shell Churning mouth 14-7, atomizer 14-8, sealing ring 14-9, back-moving spring 14-10, screw 14-11；Capped pipe 1-a, shrink cone 1-b, Bleed pipe 1-c, air outlet 1-d；Woven hose 4-a, web 4-b, ring 4-c；Central tube 7-a, wind disk 7-b, air vent 7-c, Helical blade 7-d.

Specific embodiment

Embodiment one

The secondary gas-liquid two-phase flow static nozzle of the present embodiment as shown in Figure 1, 2, including when installing by and cap 14-2 is inner Internal thread connects support 14-4 and sprinkler cap 14-1 of the pressure holding at fluid delivery tube end.Support 14-4 is by central woven hose 4-a And the ring 4-c being connected as a single entity by one group of radial web 4-b and woven hose 4-a is constituted, one end of ring 4-c has radially Extend rib, fixed at fluid delivery tube end by simultaneously cap pressure holding.Sprinkler cap 14-1 by capped pipe 1-a and by shrink cone 1-b with The bleed pipe 1-c with diffusing opening that capped pipe 1-a is connected as a single entity is constituted, and with flange is radially extended, this is turned over for the inner of its capped pipe 1-a Spring 14-10 is housed between side and the simultaneously seam of cap 14-2 outer ends, therefore by elastic pressure holding.

Spiral nozzle 14-7 is fixed by lock bracket 14-6 in sprinkler cap 14-1.Lock bracket 14-6 is revolved by with sprinkler cap 14-1 The external screw thread circle 6-a of conjunction, from external screw thread circle 6-a radial directions undergauge and one group of axially extending connecting plate 6-b and by connecting plate The centring ring 6-c of 6-b disjunctors is constituted.Referring to Fig. 5,6, spiral nozzle 14-7 by central tube 7-a, central tube 7-a radially outward from Wind disk 7-b, before a group of wind disk 7-b outer faces to helical blade 7-d and wind disk 7-b adjoining spiral blades Between air vent 7-c constitute.Central tube 7-a has radial direction inlet opening 7-e, and its inner is inserted in woven hose 4-a during assembling.In The fixed atomizer 14-8 of outer end inserting of heart pipe 7-a, the typical structure of atomizer 14-8 can be found in 200910100510.5th, 201510202751. 6, No. 201610108931.2 Chinese patent literatures, bleed pipe is stretched into its outer end In 1-c.The contraction cone of sprinkler cap 14-1 has the kidney slot air outlet 1-d of circumferentially extending, and kink is equipped with adjustable air outlet The damper 14-3 of size.Damper 14-3 have position air door corresponding with air outlet 1-d and with bleed pipe 1-c The casing section 3-a of matching, has the regulating tank 3-b for installing tapping screw 14-11 on casing section 3-a, therefore can be in certain model Spinning modulation section air outlet and the relative angular position of air door, realize that air-out regulates and controls.

During work, the High voltage output negative pole of high-voltage electrostatic power is first accessed into spray tank, plus earth makes liquid charged. The a part of air-flow that blower fan is produced enters spray tank and forms malleation by appendix so that the charged liquid in spray tank is in air pressure Effect is lower to enter connected secondary gas-liquid two-phase flow static nozzle by woven hose.Hereafter, fan airflow acts on spray The conical inboard wall of head cap 14-1, generation can overcome the axial thrust of back-moving spring 14-10 pretightning forces, so that sprinkler cap 14-1 Axial displacement is produced together with lock bracket 14-6, spiral nozzle 14-7, atomizer 14-8 and damper 14-3, now Liquid is able to enter spiral nozzle 14-7 by the inlet opening on spiral nozzle 14-7, enters back into coupled atomizer 14-8.And when being stopped, the axial thrust that fan airflow is produced decreases up to disappear rapidly, back-moving spring 14-10's Under effect, sprinkler cap 14-1 is together with lock bracket 14-6, spiral nozzle 14-7, atomizer 14-8 and damper 14-3 Produce reverse axial displacement and return to initial position, now, the liquid between spiral nozzle 14-7 and head cartridge 14-4 leads to Road is blocked, and prevents the starting stage that equipment is stopped from still having liquid to be transported to atomizer 14-8 by the design, from And avoid the liquid water clock under off rating, with preferably it is antidrip, only drop function（Referring to Fig. 3,4）.

The specific atomization process of the secondary gas-liquid two-phase flow static nozzle of the present embodiment is：The air-flow that blower fan is produced enters shower nozzle While overcoming back-moving spring 14-10 axial thrusts, cause sprinkler cap 14-1 together with axial displacements such as lock bracket 14-6 and nozzles, Liquid is able to enter spiral nozzle 14-7 by the inlet opening on spiral nozzle 14-7, enters back into coupled atomizer 14-8.Air-flow into nozzle component 14 by being divided into two parts after head cartridge 14-4 and lock bracket 14-6 again, wherein one Part air-flow is blowed in preceding 6 helical blades to distribution on spiral nozzle 14-7 through 6 air vents on spiral nozzle 14-7, So that high-speed uniform air-flow vertically produces significant eddying motion originally, so as in the exit region shape of atomizer 14-8 Into strength eddy airstream, because the central pressure of eddy airstream is minimum, close to vacuum state so that be transported to atomization spray The liquid of mouth 14-8 oral areas sprays at a high speed under the suction of the strength eddy airstream, and is clashed into eddy airstream, from And the atomization of first time gas-liquid two-phase flow is completed, this atomization is in order that liquid initial atomization drips into mist, so as to be second Ultra-fine aerosol drop offer condition is provided, at the same time, excircle and spray of another part air-flow by spiral nozzle 14-7 After annular region between the cylinder shape inner wall of head cap 14-1, because the inwall of sprinkler cap 14-1 is changed into cone, thus air-flow Flow section reduce so that the flow velocity of air-flow increase, and from Bernoulli's theorem, being produced near swiftly flowing fluid Low pressure is Venturi effect, so as to produce suction-operated, is now exported in sprinkler cap 14-1 through the droplet group after primary atomization In straight length, occur to clash into the high velocity air, mix, complete second gas-liquid two-phase flow atomization, this atomization is mainly Mist drop after being atomized for the first time is atomized into ultra-fine aerosol drop（20~50 μm of particle diameter）, and mist is increased by high velocity air Drop initial velocity, makes droplet have larger mist momentum, so as to be more beneficial for, to long-range conveying, subsequently entering sprinkler cap 14-1 outlets Diffusing opening, now droplet group is disperseed with certain cone angle, and is sprayed from the mouth end of sprinkler cap 14-1 under airflow function, and to Long-range conveying.Manually on the Angulation changes sprinkler cap 14-1 of rotary damper 14-3 air outlet size, can regulate and control Gas-liquid two-phase flow field structure during secondary-atomizing, so that the spray amount and mist droplet particle size of shower nozzle are electrodeless controllable.

Charged droplets after atomization, to long-range conveying, reach Target crops or target organismses are attached in the presence of fan airflow When near, in the presence of space electric field, to Target crops or target organismses directed movement and deposition.

It is summed up, the present embodiment realizes spray on the basis of further investigation in the way of secondary gas-liquid two-phase flow is atomized The super-low capacity of mist quantifies（Only 0.04~0.12L/min）With the fine of droplet（20~50 μm of particle diameter）, spraying penetration power it is stronger, And spray amount and mist droplet particle size can be electrodeless controllable, can conscientiously meet different pest and disease damages prevents and treats demand.With prior art Compared to following remarkable advantage：

1. the secondary-atomizing mechanism of gas-liquid two-phase flow atomization+gas-liquid two-phase flow atomization is used.Pass through atomizer first The strength eddy airstream of 14-8 exit regions so that be transported to the liquid of atomizer 14-8 oral areas in the strength vortex gas Sprayed at a high speed under the suction of stream, and clashed into eddy airstream, so that the atomization of first time gas-liquid two-phase flow is completed, this In order that liquid initial atomization drips into mist, so as to provide condition to be atomized into ultra-fine aerosol drop for the second time, secondly atomization is By the high velocity air in the straight length that sprinkler cap 14-1 is exported to by after primary atomization droplet group absorption, shocks, mix Cooperation is used, and completes second gas-liquid two-phase flow atomization, this atomization primarily to the mist after first time is atomized drips atomization Dripped into ultra-fine aerosol（20~50 μm of particle diameter）, and droplet initial velocity is increased by high velocity air, make droplet that there is larger mist Momentum, so as to be more beneficial for long-range conveying.Go out into sprinkler cap 14-1 by the droplet group after the atomization of secondary gas-liquid two-phase flow Disperseed with certain cone angle after the diffusing opening of mouth, and sprayed from the mouth end of sprinkler cap 14-1 under airflow function, and to long-range defeated Send.Additionally, the air velocity of the atomizing type can drive droplet velocities, make the specific larger mist momentum of droplet, so as to not only increase Add penetrability of the droplet in crop canopies, and for droplet provides advantage to long-range conveying.

2., by the size of air outlet on the Angulation changes sprinkler cap 14-1 of rotary damper 14-3, secondary-atomizing is regulated and controled During gas-liquid two-phase flow field structure so that the spray amount and mist droplet particle size of shower nozzle are electrodeless controllable, to meet different diseases Insect pest prevents and treats demand.

3. the antidrip only drip trap of existing hydraulic energy nozzle is the change by liquid pressure, makes the back-moving spring deformation in valve, is controlled The break-make of shower nozzle feed flow runner processed, so as to play a part of antidrip only drop.And the present embodiment is then atomized institute using gas-liquid two-phase flow The pressure change of the secondary air for needing, makes the back-moving spring deformation in nozzle component 14, controls the switching of shower nozzle feed flow runner, So as to play a part of antidrip only drop, specially：The connecting end surface of head cartridge 14-4 and spiral nozzle 14-7 passes through pad 14- 5 sealings, axially through O-ring 14-9 sealings.After equipment starts, fan airflow acts on the conical inboard wall of sprinkler cap 14-1, The thrust of axial direction is produced, so as to overcome the pretightning force of back-moving spring 14-10 so that sprinkler cap 14-1 is together with lock bracket 14-6, spiral shell Churning mouth 14-7, atomizer 14-8 and damper 14-3 produce axial displacement together, and now liquid is able to by spiral Inlet opening on nozzle 14-7 enters spiral nozzle 14-7, enters back into coupled atomizer 14-8.When equipment stops During work, the axial thrust that fan airflow is produced decreases up to disappear rapidly, in the presence of back-moving spring 14-10, sprinkler cap 14-1 produces reverse axle together with lock bracket 14-6, spiral nozzle 14-7, atomizer 14-8 and damper 14-3 To displacement and initial position is returned to, now, the medicine liquid channel between spiral nozzle 14-7 and head cartridge 14-4 is blocked, and passes through The design prevents the starting stage that equipment is stopped from still having liquid to be transported to atomizer 14-8, non-so as to avoid equipment Liquid water clock under declared working condition.

Claims (6)

1. a kind of secondary gas-liquid two-phase flow static nozzle, it is characterised in that：Including by simultaneously cap（14-2）Pressure holding is conveyed in fluid The support of pipe end（14-4）And sprinkler cap（14-1）, the support is by central woven hose（4-a）And by radial web（4- b）The ring being connected as a single entity with woven hose（4-c）Constitute, fixed by simultaneously cap pressure holding；The sprinkler cap is by capped pipe（1-a）And it is logical Cross contraction cone（1-b）The bleed pipe with diffusing opening being connected as a single entity with capped pipe（1-c）Constitute, by simultaneously cap elasticity pressure holding；The spray Pass through lock bracket in head cap（14-6）Fixed spiral nozzle（14-7）, the spiral nozzle is by central tube（7-a）, the central tube Radially outward from wind disk（7-b）, before a group of the wind disk outer face to helical blade（7-d）And the gear Air vent between wind disk adjoining spiral blade（7-c）Constitute；The inner of the central tube is inserted in the woven hose, and is had Radial direction inlet opening, the fixed atomizer of outer end inserting of the central tube（14-8）, the outer end of the atomizer is stretched into described In bleed pipe；The contraction cone of the sprinkler cap has air outlet（1-d）And kink has the damper of adjustable air outlet size （14-3）.

2. secondary gas-liquid two-phase flow static nozzle according to claim 1, it is characterised in that：The damper has position Air door corresponding with the air outlet and the casing section matched with the bleed pipe are put, is had in described sleeve pipe section and is installed tightly The regulating tank of firmware.

3. secondary gas-liquid two-phase flow static nozzle according to claim 2, it is characterised in that：The lock bracket by with shower nozzle External screw thread circle that cap is screwed, from external screw thread circle radial direction undergauge and one group of axially extending connecting plate and by connecting plate disjunctor Centring ring is constituted.

4. secondary gas-liquid two-phase flow static nozzle according to claim 3, it is characterised in that：The inner of the capped pipe has Flange is radially extended, spring is housed between the flange and the simultaneously seam of cap outer end.

5. secondary gas-liquid two-phase flow static nozzle according to claim 4, it is characterised in that：The contraction cone of the sprinkler cap Kidney slot air outlet with circumferentially extending.

6. secondary gas-liquid two-phase flow static nozzle according to claim 5, it is characterised in that：One end of the ring has Radially extend rib.