CN206716256U - A kind of secondary gas-liquid two-phase flow static nozzle - Google Patents

Abstract

A kind of secondary gas-liquid two-phase flow static nozzle is the utility model is related to, belongs to spraying nozzle technical field.The shower nozzle includes support and sprinkler cap, and support is formed by woven hose and by the ring of web disjunctor；The bleed pipe that sprinkler cap bores disjunctor by capped pipe and by shrinking is formed；Spiral nozzle is fixed by lock bracket in sprinkler cap, spiral nozzle to helical blade and air vent from forming 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 utility model realizes super-low capacity quantization and the fine of droplet of spraying in a manner 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, can meet the preventing and treating demand of different pest and disease damages conscientiously.

Description

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

Technical field

A kind of atomizer is the utility model is related to, especially a kind of secondary gas-liquid two-phase flow static nozzle 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, realize the transmission efficient to target of pesticide droplet and deposit.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 High prevention and control of plant diseases, pest control effect and pesticide efficacy.

The charge-mass ratio of droplet is to influence the key factor of electrostatic spray effect, and it reflects electricity possessed by unit mass droplet Amount.Charge-mass ratio is bigger, illustrates that droplet charging effect is better, is more advantageous to droplet in the presence of electric field force to target（Target crops Or target organismses）Transmit and deposit.There are some researches show low mist flow and high secondary air amount can obtain higher lotus matter 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 as to not only increase penetrability of the droplet in crop canopies, while provided for droplet to long-range conveying Sharp condition.

Retrieval understands that Application No. 201010136395.X Chinese patent application discloses a kind of sprayer-duster low amounts Shower nozzle, has a 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 are connected with the apopore and woven hose of water dumping hole and low amounts nozzle.The decoction of this shower nozzle passes through Cap of spraying nozzle inwall is impinged upon tentatively to be broken up, in the presence of centrifugal force and wall attachment effect from cap of spraying nozzle lumen centers laterally expanded Dissipate and thrown away from the shunting of water dumping hole, the droplet being finally sprayed onto under triple role on crops 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 passes through medicine first to hit broken+pneumatic atomization The effect of impact of liquid and cap of spraying nozzle inwall, makes decoction be broken into larger droplet, then is acted on by strength, makes the further mist of droplet More fine mist is melted into, though fine mist can be obtained, the spray amount and mist droplet particle size formed is relatively-stationary, it is impossible to is met The preventing and treating demand of different pest and disease damages.

In addition, 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 connects into is buckled in by honeycomb screen, sprayer body, decoction 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 decoction Pipe is connected, and the hypomere of spreader has fluid hole, and fluted disc, hollow cone of the solid shaft assembling in spreader epimere is fixedly mounted in hypomere upper end 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 crushed, i.e., makes decoction along spreader outer surface by action of high-speed airflow first Form very thin liquid film, be blown to fluted disc edge, decoction forms brin on crown, then cut off by high velocity air to be formed compared with Big droplet, then it is further broken up into droplet more tiny by the effect of impact of big droplet and 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 of spray amounts and mist droplet particle size are big It is small optional, still it is difficult to the preventing and treating demand for meeting different pest and disease damages.

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 decoction enters shower nozzle, shower nozzle by woven hose It is fixed on the outside of duckbilled air outlet；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 the outside of duckbilled air outlet, reduces natural wind pair The influence of liquid stream；Decoction is carried out secondary-atomizing by the utility model using the air-flow that duckbilled air outlet is blown out, and forms thinner mist Drop.Its actual atomization mechanism is electro-hydrodynamic atomization+pneumatic atomization, i.e., makes medical liquid atomizing into larger by one group of fan nozzle first Droplet, then droplet is further atomized into more fine mist by air-flow.Because droplet spectrum width be present in electro-hydrodynamic atomization（That is droplet Thickness it is uneven, big droplet is easy to run off, the easy drift of small droplet, so as to while pesticide efficacy is reduced, cause environment Pollution）The shortcomings that, and droplet volume medium depends mainly on the size of selected fan nozzle model, thus work as After fan nozzle model is selected, the droplet volume medium for being atomized formation is relatively-stationary, it is impossible to according to controlling object Different require and change.

The content of the invention

The purpose of this utility model is：The shortcomings that existing for above-mentioned prior art, propose that a kind of not only droplet is thinner It is small uniformly, penetration power it is stronger, and spray amount and mist droplet particle size can electrodeless controllable secondary gas-liquid two-phase flow static nozzle, with Meet the preventing and treating demand of different pest and disease damages.

In order to reach object above, secondary gas-liquid two-phase flow static nozzle basic technical scheme of the present utility model is：Bag Include by support and sprinkler cap of the simultaneously cap pressure holding at fluid delivery tube end, the support is by central woven hose and passes through radially Web is formed with the ring that woven hose is connected as a single entity, and is fixed by simultaneously cap pressure holding；The sprinkler cap is bored by capped pipe and by shrinking Formed with the bleed pipe with diffusing opening that capped pipe is connected as a single entity, by simultaneously cap elasticity pressure holding；Consolidated in the sprinkler cap by lock bracket Determine spiral nozzle, the spiral nozzle by central tube, the central tube radially outward from wind disk, outside the wind disk Formed before one group of end face to the air vent between helical blade and the wind disk adjoining spiral blade；The central tube The inner is inserted in the woven hose, and has radial direction inlet opening, the fixed atomizer of outer end inserting of the central tube, the mist The outer end for changing nozzle is stretched into the bleed pipe；The contraction cone of the sprinkler cap has air outlet and kink has adjustable air outlet The damper of size.

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, there is 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, which has, radially extends flange, is filled between the flange and the simultaneously seam of cap outer end There is spring.

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

Further, one end of the ring, which has, radially extends 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 decoction is able to by entering Fluid apertures enters the central tube of spiral nozzle, and then is sprayed by atomizer.At the same time, head cartridge and the gas of lock bracket are flowed through Stream is classified into two-way, to distribution helical blade before being blowed to all the way through the air vent on spiral nozzle, so that axial flow becomes For 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 decoction of jet expansion sprays at a high speed under suction, and is hit with eddy airstream, makes decoction through first time gas-liquid two Mutually stream atomization is tentatively dripped into mist, and the aerosol drop to be atomized into ultra-fine for the second time lays the foundation；Another way air-flow then passes through spiral Annular region between the excircle of nozzle and the capped pipe inwall of sprinkler cap, shunk in sprinkler cap at the conical wall of cone because of mistake 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, the droplet group after primary atomization is set to occur to hit with the high velocity air in the ejection pipeline section of sprinkler cap, mix Close, realize second of gas-liquid two-phase flow atomization, the mist drop after first time is atomized is atomized into ultra-fine aerosol and dripped, and passes through height Fast air-flow increases droplet initial velocity, and the diffusion of bleed pipe can be subsequently entered to the relatively dense fog momentum remotely conveyed by having droplet Mouthful, disperseed with certain cone angle, and sprayed under airflow function to long-range conveying.

Brief description of the drawings

The utility model is further described below in conjunction with the accompanying drawings.

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

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

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

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

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

Fig. 6 is Fig. 5 side view.

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.

Embodiment

Embodiment one

The secondary gas-liquid two-phase flow static nozzle of the present embodiment as shown in Figure 1, 2, including installation when by and cap 14-2 in Support 14-4 and sprinkler cap 14-1 of the internal thread connection pressure holding at end 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 are formed, and ring 4-c one end has Rib is radially extended, is fixed by simultaneously cap pressure holding at fluid delivery tube end.Sprinkler cap 14-1 bores 1- by capped pipe 1-a and by shrinking The bleed pipe 1-c with diffusing opening that b and capped pipe 1-a is connected as a single entity is formed, and its capped pipe 1-a the inner, which has, radially extends flange, Spring 14-10 is housed between the flange 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 with sprinkler cap 14-1 by revolving The external screw thread circle 6-a of conjunction, from external screw thread circle 6-a radial directions undergauge and axially extending one group of connecting plate 6-b and pass through connecting plate The centring ring 6-c of 6-b disjunctors is formed.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 one 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 form.Central tube 7-a has a radial direction inlet opening 7-e, during assembling in the insertion woven hose 4-a of its inner.In The heart pipe 7-a fixed atomizer 14-8 of outer end inserting, atomizer 14-8 typical structure can be found in 200910100510.5,201510202751. 6, No. 201610108931.2 Chinese patent literatures, bleed pipe is stretched into its outer end In 1-c.Sprinkler cap 14-1 contraction kidney slot air outlet 1-d of the cone with 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 There is the regulating tank 3-b for installing tapping screw 14-11 on the casing section 3-a of matching, casing section 3-a, therefore can be in certain model The relative angular position of spinning modulation section air outlet and 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 decoction charged. A part of air-flow caused by blower fan enters spray tank by appendix and forms malleation so that the charged decoction 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 Head cap 14-1 conical inboard wall, the axial thrust that can overcome back-moving spring 14-10 pretightning forces is produced, 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 Decoction 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, axial thrust caused by fan airflow decreases up to rapidly disappearance, 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 decoction 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 decoction to be transported to atomizer 14-8 by the design, from And avoid the decoction water clock under off rating, have 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：Air-flow caused by blower fan 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, Decoction is able to enter spiral nozzle 14-7 by the inlet opening on spiral nozzle 14-7, enters back into coupled atomizer 14-8.Into nozzle component 14 air-flow by being divided into two parts after head cartridge 14-4 and lock bracket 14-6 again, wherein one Part air-flow is blowed on spiral nozzle 14-7 in preceding 6 helical blades to distribution 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 atomizer 14-8 exit region shape 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 decoction of mouth 14-8 oral areas sprays at a high speed under the suction of the strength eddy airstream, and is hit with eddy airstream, from And the atomization of first time gas-liquid two-phase flow is completed, this atomization is in order that decoction initial atomization drips into mist, so as to be second Ultra-fine aerosol drop offer condition, at the same time, excircle and spray of another part air-flow by spiral nozzle 14-7 are provided After annular region between head cap 14-1 cylinder shape inner wall, because sprinkler cap 14-1 inwall is changed into cone, thus air-flow Flow section reduce so that the flow velocity of air-flow increase, and from Bernoulli's theorem, can be produced near swiftly flowing fluid Low pressure is Venturi effect, and so as to produce suction-operated, now the droplet group after primary atomization exports in sprinkler cap 14-1 In straight length, occur to hit with the high velocity air, mix, complete second of 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 Initial velocity is dripped, makes droplet that there is 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 under airflow function from sprinkler cap 14-1 mouth end, and to Long-range conveying.Manually on rotary damper 14-3 angulation change sprinkler cap 14-1 air outlet size, can regulate and control Gas-liquid two-phase flow field structure during secondary-atomizing, so that the spray amount of shower nozzle and mist droplet particle size 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 a manner 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 is stronger, And spray amount and mist droplet particle size can be electrodeless controllable, the preventing and treating demand of different pest and disease damages can be met conscientiously.With prior art Compared to following remarkable advantage：

1. be atomized using gas-liquid two-phase flow+the secondary-atomizing mechanism of gas-liquid two-phase flow atomization.Pass through atomization first The strength eddy airstream of nozzle 14-8 exit regions so that be transported to the decoction of atomizer 14-8 oral areas in the strength whirlpool Spray at a high speed under the suction of rotational gas flow, and hit with eddy airstream, so as to complete the atomization of first time gas-liquid two-phase flow, This atomization is in order that decoction initial atomization drips into mist, and condition is provided so as to drip to be atomized into ultra-fine aerosol for the second time, Secondly by absorption of the high velocity air in the straight length of sprinkler cap 14-1 outlets to the droplet group after primary atomization, hit Hit, immixture, complete second of gas-liquid two-phase flow atomization, this atomization is primarily to the mist after first time is atomized drips It is atomized into ultra-fine aerosol drop（20~50 μm of particle diameter）, and droplet initial velocity is increased by high velocity air, there is droplet larger Mist momentum, so as to be more beneficial for long-range conveying.Droplet group after the atomization of secondary gas-liquid two-phase flow enters sprinkler cap 14- Disperseed after the diffusing opening of 1 outlet with certain cone angle, and sprayed under airflow function from sprinkler cap 14-1 mouth end, and to long-range Conveying.In addition, the air velocity of the atomizing type can drive droplet velocities, make the specific larger mist momentum of droplet, so as to not only Penetrability of the droplet in crop canopies is added, and advantage is provided to long-range conveying for droplet.

2. the size of air outlet on the angulation change sprinkler cap 14-1 for passing through rotary damper 14-3, regulate and control secondary-atomizing During gas-liquid two-phase flow field structure so that the spray amount of shower nozzle and mist droplet particle size are electrodeless controllable, to meet different diseases The preventing and treating demand of insect pest.

3. the antidrip only drip trap of existing hydraulic energy nozzle is by the change of decoction pressure, makes the back-moving spring deformation in valve, control The break-make of shower nozzle feed flow runner processed, so as to play a part of antidrip only drop.And the present embodiment then utilizes gas-liquid two-phase flow atomization institute The pressure change of the secondary air needed, make the back-moving spring deformation in nozzle component 14, control the switching of shower nozzle feed flow runner, So as to play a part of antidrip only drop, it is specially：Head cartridge 14-4 and spiral nozzle 14-7 connecting end surface passes through pad 14- 5 sealings, are sealed axially through O-ring 14-9.After equipment starts, fan airflow acts on sprinkler cap 14-1 conical inboard wall, The thrust of axial direction is produced, so as to overcome back-moving spring 14-10 pretightning force 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 decoction is able to pass through spiral Inlet opening on nozzle 14-7 enters spiral nozzle 14-7, enters back into coupled atomizer 14-8.When equipment stops During work, axial thrust caused by fan airflow decreases up to rapidly disappearance, 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 is passed through The design prevents the starting stage that equipment is stopped from still having decoction to be transported to atomizer 14-8, non-so as to avoid equipment Decoction water clock under declared working condition.

Claims (6)

1. A kind of 1. secondary gas-liquid two-phase flow static nozzle, it is characterised in that：Including passing through simultaneously cap（14-2）Pressure holding conveys in fluid The support of pipe end（14-4）And sprinkler cap（14-1）, the support is by central woven hose（4-a）And pass through radial web（4- b）The ring being connected as a single entity with woven hose（4-c）Form, fixed by simultaneously cap pressure holding；The sprinkler cap is by capped pipe（1-a）It is and logical Cross contraction cone（1-b）The bleed pipe with diffusing opening being connected as a single entity with capped pipe（1-c）Form, 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 one 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）Form；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. 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 to match with the bleed pipe are put, has in described sleeve pipe section and installs tightly The regulating tank of firmware.
3. 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 screws, from external screw thread circle radial direction undergauge and axially extending one group of connecting plate and by connecting plate disjunctor Centring ring is formed.
4. 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. 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. 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.