CN103769319B - A kind of profiling electrode static nozzle - Google Patents
A kind of profiling electrode static nozzle Download PDFInfo
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- CN103769319B CN103769319B CN201410066860.5A CN201410066860A CN103769319B CN 103769319 B CN103769319 B CN 103769319B CN 201410066860 A CN201410066860 A CN 201410066860A CN 103769319 B CN103769319 B CN 103769319B
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- nozzle
- profiling electrode
- electrode
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- passage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
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- Electrostatic Spraying Apparatus (AREA)
- Catching Or Destruction (AREA)
Abstract
The present invention relates to a kind of profiling electrode static nozzle, belong to technical field of plant protection.This shower nozzle comprises the hollow cone atomizing nozzle assembly being contained in feed tube end, the profiling electrode be electrically connected with high-voltage static power is equipped with in the front end of described nozzle assembly, described profiling electrode be cone angle and described hollow cone spray angle match tubaeform, described profiling electrode-clad has insulating barrier, described nozzle assembly and profiling electrode jacket have blast pipe, form annular air-flow path between described nozzle assembly and blast pipe, described gas channel leads to the internal layer air curtain passage formed between profiling electrode and blast pipe in outer air curtain passage and profiling electrode.After adopting the present invention, even if desirable sprayed deposit effect also can be ensured at open environment, be extremely suitable for agricultural plant protection spray medicine.
Description
Technical field
The present invention relates to a kind of static nozzle, especially a kind of profiling electrode static nozzle, belongs to technical field of plant protection.
Background technology
Agricultural electrostatic spray utilizes high-pressure electrostatic to make pesticide droplet charged, and forms electrostatic field between shower nozzle and target.Because electrostatic field has guidance quality to Charged Droplet, therefore can improve the result of use of agricultural chemicals, alleviate environmental pollution.
Retrieval finds, application number be 200620030476.0 Chinese patent disclose a kind of composite charging electrostatic spraying device, comprise hydraulic type nozzle body, nozzle body is provided with combined charging electrode, combined charging electrode be by the annular shaped charge pole surrounded on nozzle body, cover at nozzle body spout outside conical ring charging electrode, the aciculiform be arranged on conical ring charging electrode opening's edge inwall pole of charging connect and compose through energising, the outer surface of annular shaped charge pole, conical ring charging electrode is surrounded with insulating barrier.This device Problems existing is only surrounded with insulating barrier at the outer surface of electrode, and naked between electrode inner wall and spray, under being in spraying high humidity environment, spray will obtain electrostatic induction and don't can leak electricity, the diameter of conical ring electrode is inevitable very large, its induction charging limited efficiency, and want its needle-like corona charge electrode to have an effect, the charging voltage that is bound to is very high, in the operating environment that farmland is open, security can not be guaranteed (see " mechanical facilities of irrigation and drainage engineering journal " the 2nd phase the 30th volume 245 ~ 248 pages " experimental study of high deposition electrostatic atomizer " in 2012).
Application number be 200920140278.3 Chinese patent application disclose a kind of Pneumatic electrostatic spray head, primarily of little annular electrode, protective cover, nozzle body, little sprayer body, fluid passage, gas passage, packing ring, the nozzle cap of nozzle, O-ring seal, the large annular electrode that sprayer body is embedded, the aciculiform charging electrode be connected with large annular electrode, the compositions such as the cavity that size annular electrode is communicated with and nozzle.During work, under outside voltage electric field effect, make liquid form the moment of water smoke at jet expansion, according to electrostatic induction principle, combined charging electrode makes the droplet of ejection with the electric charge contrary with external electrical field charge polarity.Namely after switching on power, the electric field between shower nozzle and induction polar ring makes electric charge around loop flow, and positive charge accumulates on induction polar ring, and negative electrical charge accumulates on the liquid a fluid stream of ejection.This type of static nozzle is biphase gas and liquid flow static nozzle, the droplet charging effect of built-in electrode is good, safe and reliable, so be used widely in electrostatic spraying field, but in farmland operation environment, because the spreading of spray of biphase gas and liquid flow shower nozzle only has about 18 °, far below the spreading of spray of fluid power hollow garden cone fog spray head 80 °, the spray coverage of single shower nozzle is very low, operating efficiency is low, and operation power needed for biphase gas and liquid flow shower nozzle is large, bull spraying required drive is difficult to be met in agricultural production.
Application number is that the Chinese patent of 201120503611.X discloses and is a kind ofly applied in mechanization of agriculture and sprays insecticide the induction type electrostatic spray nozzles in field; it comprises quick detach base, quick detach gland, baffle, insulation protective jacket, nozzle, electrostatic circle and power connection; quick detach base is connected with quick detach gland is rotary; baffle is through the axle center of insulation protective jacket, and baffle is connected by external screw thread with nozzle and is fixed on insulation protection and puts.Although this nozzle achieves quick detach, simplifies technique, its electrostatic induction electrode remains uninsulated annular electrode, electrostatic induction weak effect under the high humidity environment between electrode and spray and unstable.
In a word, there is following problem in above-mentioned prior art in practical application agricultural: the open environment air-flow 1) due to spray pesticide is uncontrollable, and therefore the actual deposition of electrostatic spray is easy to affect by wind field, and effect is unstable; 2) do not properly handle Insulation Problems between electrode and spray, be difficult under high humidity environment ensure fully stable droplet charging effect, often occur sprayed deposit effect and common spraying difference little.Therefore, to require further improvement and perfect.
Summary of the invention
The object of the invention is to: the shortcoming existed for above-mentioned prior art, even if propose a kind of profiling electrode static nozzle that also can ensure desired spray deposition effect at open environment, thus conscientiously solve the problem in agricultural application.
In order to reach above object, profiling electrode static nozzle of the present invention comprises the hollow cone atomizing nozzle assembly being contained in feed tube end, the profiling electrode be electrically connected with high-voltage static power is equipped with in the front end of described nozzle assembly, described profiling electrode be cone angle and described hollow cone spray angle match tubaeform, described profiling electrode-clad has insulating barrier, described nozzle assembly and profiling electrode jacket have blast pipe, annular air-flow path is formed between described nozzle assembly and blast pipe, described gas channel leads to the internal layer air curtain passage formed between profiling electrode and blast pipe in outer air curtain passage and profiling electrode.
After adopting the present invention, the profiling nozzle assembly matched with hollow cone spray angle can make the droplet in spraying be in best induction charging state, the outer air curtain that outer air curtain passage is formed, obviously can reduce the impact of outside wind field on Spray stability, internal layer air curtain passage then forms the attached wall air curtain in profiling electrode when spraying, hollow cone mist and profiling electrode inner wall not only can be kept to have required charging gap, thus ensure that droplet forms sufficient charge inducing, and attached wall air curtain can effectively avoid droplet to adhere to, prevent absorption on electrode wall from piling up the globule impact of Charged Droplet formation to the electrostatic induction effect of spraying.Therefore after adopting the present invention, while to the abundant constant charge of droplet, also effectively isolate outside wind field, even if desirable sprayed deposit effect also can be ensured at open environment, be extremely suitable for agricultural plant protection spray medicine.
By test, it is that described outer air curtain passage and internal layer air curtain passage are made up of one group of external spiral passage and one group of internal thread passage respectively that applicant further improves the present invention.Can form the eddy flow air curtain of similar " cyclone " shape like this, stability is better, and isolation effect is better.Especially, the rotation direction of external spiral passage and internal thread passage is contrary, best results.
In test, applicant is also found by high-speed photography, because the droplet after charged has repulsive interaction, therefore the cone angle of hollow cone mist can be caused to become large, and this change is starting particularly evident apart from nozzle certain distance, and therefore in order to best profiling is to obtain desirable charging effect, the present invention further optimizes is, the initial cone angle of described profiling electrode adjacent nozzles is less than the terminal bevel of outer end, forms offset angle between described initial cone angle and terminal bevel.。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation of the embodiment of the present invention one.
Fig. 2 is the partial structurtes schematic diagram of the embodiment of the present invention two.
Fig. 3 is the structural representation of the embodiment of the present invention three.
Fig. 4 is the A-A sectional view of Fig. 3.
In figure: 1. feed tube joint, 2. nozzle boss, 3. sprinkler cap, 4. support column, 5. electrode jacket, 6. electrode, 7. nozzle, 8. high pressure resistant insulation layer, 9. insulated screw, 10. blast pipe, 10-1 annular passage, the outer air curtain passage of 10-2,10-3 internal layer air curtain passage, 11. eddy flow passages.
Detailed description of the invention
Embodiment one
The profiling electrode static nozzle basic structure of the present embodiment as shown in Figure 1, comprise the hollow cone atomizing nozzle assembly being contained in feed tube end-fitting 1, the tubulose nozzle boss 2 that this nozzle assembly is connected with feed tube joint 1 by screw thread by rear end, the nozzle 7 being positioned at nozzle boss 2 front end and the insulating materials sprinkler cap 3 being connected pressure holding fixed nozzle 7 with nozzle boss 2 nose threads are formed.At least two cantilever 3-1 that sprinkler cap 3 radial direction is extended, are fixed in the profiling electrode 6 of spray nozzle front end by insulated screw 9, one of insulated screw 9, as the binding post of fixing High voltage output wire, makes profiling electrode 6 be electrically connected with high-voltage static power.Profiling electrode 6 in cone angle and hollow cone spray angle match tubaeform, cylindrical is coated with the ring electrode overcoat 5 of insulation, and inwall is close to high pressure resistant insulation layer 8.Nozzle and profiling electrode jacket have blast pipe 10, form annular air-flow path 10-1 between nozzle assembly and blast pipe 10, this gas channel leads to the internal layer air curtain path 10-3 formed between profiling electrode 6 and blast pipe 10 in outer air curtain path 10-2 and profiling electrode 6.
Liquid enters mist formation region through 5 ~ 10mm side after nozzle ejection, and the profiling electrode 6 that the present embodiment is maked somebody a mere figurehead is 5 ~ 10mm with the distance T of nozzle 7 front end face, is just in time in droplet and generates band, be therefore physically located in best electrostatic induction nebulization region.Can be found out by formula below, increase ε, S and reduction d in electrostatic atomization region, the electrostatic induction electric charge of droplet can be improved:
C=εS/4kπd=Q/U
In formula: electric capacity C and induction electrostatic charge Q is directly proportional to the permittivity ε of insulating barrier, and amass S to right opposite and be directly proportional, and the distance d between pole plate is inversely proportional to, the k in its Chinese style is electrostatic force constant.The profiling of inner cone profiling electrode and hollow cone spray coincide and can realize maximum S and minimum average B configuration d in electrostatic induction nebulization region.
During work, the effect of outer air curtain is: 1) isolate with outer farmland humiture environment, provide stable open farm work environment; 2) stop electrostatic droplet soaking and suction to human body injecting-unit, and boosting spray sprays to target.The effect of internal layer air curtain is: stop that electrostatic droplet is to the absorption of electrode, affect electrostatic induction atomization after avoiding electrode wall being piled up the charged globule.
Test proves, the deposition efficiency after its spray pesticide is significantly higher than the nozzle of prior art, therefore effectively can improve the service efficiency of agricultural chemicals, alleviate environmental pollution.
Embodiment two
The profiling electrode static nozzle basic structure of the present embodiment is identical with embodiment one, main difference part as shown in Figure 2, profiling electrode has two-stage cone angle, and the initial cone angle of adjacent nozzles is less than the terminal bevel of outer end, forms offset angle β (being advisable for 12 ° ~ 15 °) between the two.This measure finds when observing spray by high-speed photography because of applicant, the hollow cone mist of original calibrating nozzle ejection becomes large with the cone angle of hollow cone mist during electrostatic spray, known after analysis, this phenomenon has caused by repulsive interaction because of the droplet after charged.Profiling electrode changes cone angle thereupon and d can be kept substantially constant, to ensure to coincide with spray shape, thus obtains best charging effect.
The profiling electrode static nozzle of the present embodiment and another main difference part of embodiment one are see embodiment three.
The offset angle of the present embodiment both can pass through the inclined-plane formation of two-stage different cone angle (initial cone angle and terminal bevel), also can be formed by the transition arc determined by initial cone angle and terminal bevel, such as from electrode stage casing, be progressively transitioned into end with radius R (20 ~ 25mm) circular arc, form offset angle β, make end port offset 3 ~ 4mm laterally.
Embodiment three
The profiling electrode static nozzle structure of the present embodiment as shown in Figure 3 and Figure 4, be that outer air curtain passage and internal layer air curtain passage are made up of at interior helical swirl passage one group (the present embodiment is 8, also can increase and decrease as one sees fit) helical swirl passage 11 outside and one group respectively with the main difference of embodiment one.Can form the eddy flow air curtain of similar " cyclone " shape like this, stability is better, and isolation effect is better.Especially, helical swirl passage outside and contrary in interior helical swirl passage rotation direction, best results.
Claims (5)
1. a profiling electrode static nozzle, comprise the hollow cone atomizing nozzle assembly being contained in feed tube end, it is characterized in that: the profiling electrode be electrically connected with high-voltage static power is equipped with in the front end of described nozzle assembly, described profiling electrode be cone angle and described hollow cone spray angle match tubaeform, described profiling electrode-clad has insulating barrier, described nozzle assembly and profiling electrode jacket have blast pipe, annular air-flow path is formed between described nozzle assembly and blast pipe, described gas channel is towards the internal layer air curtain passage in the outer air curtain passage formed between profiling electrode and blast pipe and profiling electrode, described outer air curtain passage is made up of one group of external spiral passage, and described internal layer air curtain passage is made up of one group of inside spin passage, the initial cone angle of described profiling electrode adjacent nozzles is less than the terminal bevel of outer end, forms offset angle between described initial cone angle and terminal bevel, the tubulose nozzle boss that described nozzle assembly is connected with feed tube joint by screw thread by rear end, the nozzle being positioned at nozzle boss front end and the insulating materials sprinkler cap being connected pressure holding fixed nozzle with nozzle boss nose threads are formed.
2. profiling electrode static nozzle according to claim 1, it is characterized in that: at least two cantilevers that described sprinkler cap radial direction is extended, the profiling electrode of spray nozzle front end is fixed in by insulated screw, one of described insulated screw, as the binding post of fixing High voltage output wire, makes profiling electrode be electrically connected with high-voltage static power.
3. profiling electrode static nozzle according to claim 2, is characterized in that: the distance in described profiling electrode and spray nozzle front end face is 5 ~ 10mm.
4. profiling electrode static nozzle according to claim 2, is characterized in that: described offset angle is formed by the inclined-plane of two-stage different cone angle or the transition arc determined by initial cone angle and terminal bevel.
5. profiling electrode static nozzle according to claim 4, is characterized in that: described external spiral passage is contrary with inside spin passage rotation direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410066860.5A CN103769319B (en) | 2014-02-26 | 2014-02-26 | A kind of profiling electrode static nozzle |
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| CN201410066860.5A CN103769319B (en) | 2014-02-26 | 2014-02-26 | A kind of profiling electrode static nozzle |
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| CN103769319A CN103769319A (en) | 2014-05-07 |
| CN103769319B true CN103769319B (en) | 2015-12-30 |
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| CN104028381B (en) * | 2014-06-12 | 2016-08-24 | 云立方秦皇岛科技有限公司 | A kind of charged fog gun eliminating city raised dust and haze pollution |
| CN105057134A (en) * | 2015-08-20 | 2015-11-18 | 山东华盛农业药械有限责任公司 | Electrostatic sprayer of electrostatic spraying machine |
| CN106733263A (en) * | 2017-01-16 | 2017-05-31 | 西北农林科技大学 | A kind of bubble charging electrode static nozzle |
| CN106925453B (en) * | 2017-04-10 | 2022-04-26 | 农业部南京农业机械化研究所 | Secondary gas-liquid two-phase flow electrostatic sprayer |
| CN107096658A (en) * | 2017-04-21 | 2017-08-29 | 昆明七零五所科技发展总公司 | A kind of tobacco charging electrostatic atomization nozzle |
| CN108311305A (en) * | 2018-04-11 | 2018-07-24 | 黑龙江八农垦大学 | Stage type static nozzle induction electrode |
| CN112387437B (en) * | 2020-10-13 | 2021-12-21 | 江苏大学 | Antidrip ultramicro lotus electric spray device |
| CN112111783A (en) * | 2020-10-14 | 2020-12-22 | 天津工业大学 | Electrostatic atomization chemical vapor deposition gallium oxide film system |
| CN113414020A (en) * | 2021-05-19 | 2021-09-21 | 山东省农业机械科学研究院 | Gas-liquid two-phase high-voltage electrostatic spray head and spray device |
| CN113678807A (en) * | 2021-06-28 | 2021-11-23 | 浙江普莱得电器股份有限公司 | Pump body formula electrostatic atomization ware |
| CN113785815A (en) * | 2021-09-08 | 2021-12-14 | 华南农业大学 | Hillside orchard rail carrying air-conveying plant protection spraying equipment |
| CN114226089B (en) * | 2021-12-13 | 2022-11-22 | 华南农业大学 | Profiling grid induction type electrostatic sprayer device and spraying device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5975425A (en) * | 1997-08-14 | 1999-11-02 | The United States Of America As Represented By The Secretary Of Agriculture | Technique to reduce chemical usage and concomitant drift from aerial sprays |
| CN2920427Y (en) * | 2006-06-23 | 2007-07-11 | 河南农业大学 | Composite charging electrostatic spraying device |
| CN201510953U (en) * | 2009-06-17 | 2010-06-23 | 新疆农垦科学院农机研究所 | Pneumatic electrostatic spray head |
| CN201510954U (en) * | 2009-08-06 | 2010-06-23 | 江苏大学 | Shifting-prevention electrostatic atomization nozzle |
| CN202219211U (en) * | 2011-08-29 | 2012-05-16 | 常州亚美柯机械设备有限公司 | Electrostatic spraying device for spraying liquid to crops |
| CN203737456U (en) * | 2014-02-26 | 2014-07-30 | 农业部南京农业机械化研究所 | Profile modeling electrode electrostatic sprinkler head |
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