CN105052883A - Impulse type thermal aerosol generator adjustable in pesticide flow and pesticide flow adjusting method - Google Patents
Impulse type thermal aerosol generator adjustable in pesticide flow and pesticide flow adjusting method Download PDFInfo
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- CN105052883A CN105052883A CN201510587356.4A CN201510587356A CN105052883A CN 105052883 A CN105052883 A CN 105052883A CN 201510587356 A CN201510587356 A CN 201510587356A CN 105052883 A CN105052883 A CN 105052883A
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Abstract
The invention provides a thermal aerosol generator adjustable in pesticide flow. According to the thermal aerosol generator adjustable in pesticide flow, the spray liquid flow at a pesticide spray nozzle can be adjusted and controlled through a self-excitation self-suction pesticide supply system. The thermal aerosol generator adjustable in pesticide flow comprises an impulse type engine and the pesticide supply system. The impulse type engine comprises a combustion chamber, a spray pipe, a spark plug, a carburetor, an oil tank and an inflator. The pesticide supply system comprises a one-way valve capable of adjusting starting pressure, a pesticide box and the pesticide spray nozzle. An air entrainment port of the carburetor, the one-way valve and the upper portion of the pesticide box are sequentially connected in series, and the bottom of the pesticide box is communicated with the pesticide spray nozzle. The invention further provides a thermal aerosol generator pesticide flow adjusting method for adjusting the spray liquid flow at the pesticide spray nozzle through the self-excitation self-suction pesticide supply system. The method is easy and convenient to operate and easy to control. The method comprises the steps that when the thermal aerosol generator works, air which has pressure impulse changes formed by impulse combustion in the combustion chamber enters the upper portion of the pesticide box through the air entrainment port of the carburetor and the one-way valve when in positive pressure; the pesticide flow is adjusted by adjusting the starting pressure of the one-way valve.
Description
Technical field
The present invention relates to a kind of pulsed thermal aerosol generator medicinal liquid flow control method and device, for spraying adjustment and the measurement of medicine flow, belonging to agriculture and forestry or plant protection spraying aerosol spraying testing of equipment technical field.
Background technology
Thermal aerosol medicine carrying Prevention Technique is the chemical prevention and control method of a kind of novel, efficient, the low cost for preventing and treating the aspects such as agricultural damage by disease and insect, disinfecting, has that preventive effect is high, cost is low, an advantage such as ultra low volume, pollution are little.Thermal aerosol generator is as the dispenser facility of thermal aerosol medicine carrying Prevention Technique, utilize the heat energy of the high-temperature gas produced that burns and kinetic energy and burn hot metal surface and medicament cracking is atomized, a kind of machinery of diseases and pests controlling efficiently, its smog footpath grain, generally at below 50um, mainly contains electrical heating type, waste gas heated type, stable state combustion device formula and pulsed four kinds.
During the work of pulsed thermal aerosol generator, liquid flows into jet pipe from medicine-chest through grug transportation tube, medicine switch and medicine nozzle, and be evaporated or vaporized under the effect of high temperature, high frequency and high velocity air, be broken into fine mist, be sprayed onto air from nozzle exit, and promptly spread with natural airflow and fill the air.In the process that thermal aerosol generator is prevented and treated agricultural damage by disease and insect, the size of spray medicine flow has considerable influence for the mist droplet particle size of different agents and pesticide supplying effect.Medicinal liquid flow is excessive, and liquid can not fully be atomized, and can form drop and flow out from jet pipe.Medicinal liquid flow is too small, and fluid temperature is too high, and have a negative impact to the activity of effective ingredient in liquid, drug effect is poor, and dispenser efficiency is low.In addition, along with the change of hydrojet flow, the droplet group of the atomization formation of jet pipe can produce different retardations to the reciprocal pulsation of air-flow, and vibration characteristics and the ignition temperature of air-flow in room-jet pipe are burnt in impact.Therefore, being atomized to meet the heat energy of the pulsed motor of thermal aerosol generator, kinetic energy and liquid the requirement matched completely, preventing the generation of dropping liquid, improving pesticide supplying effect, reply spray medicine flow regulates.
Because spray medicine flow is significant to thermal aerosol generator service behaviour and liquid fuming atomizing effect, and the flow for medicine system of general thermal aerosol generator is nonadjustable, the domestic and international Regulating study about spray medicine flow is less at present, the device regulated medicinal liquid flow for self-excitation self-priming spray medicine system is less, is almost in blank.
Summary of the invention
The object of this invention is to provide a kind of self-excitation self-priming that can rely on and realize the adjustable thermal aerosol generator of medicinal liquid flow to the regulating and control of medicine nozzle place hydrojet flow for medicine system.
The adjustable thermal aerosol generator of medicinal liquid flow of the present invention, comprises pulse duct, for medicine system; Pulse duct comprises combustion chamber, jet pipe, spark plug, carburetor, fuel tank and inflator: comprise check valve, medicine-chest and the medicine nozzle that can regulate opening pressure for medicine system; Carburetor bleed ports, check valve, medicine-chest top are connected successively, communicate bottom medicine-chest with medicine nozzle.
The beneficial effect of the adjustable thermal aerosol generator of this medicinal liquid flow: this thermal aerosol generator is when normal spraying or aerosol spraying operation, in combustion chamber, the gas of the pressure fluctuation change that intermittent combustion is formed is when pressure is greater than the opening pressure of check valve, medicine-chest is entered through carburetor bleed ports, check valve, certain pressure is formed in medicine-chest upper space, liquid is atomized after spraying into jet pipe by medicine nozzle, then sprays through jet pipe.By changing the opening pressure of check valve, change pressure and the gas flow of the gas entered in medicine-chest, and then change the gas pressure in medicine-chest upper space, medicinal liquid flow also changes thereupon.This patent relies on self-excitation self-priming to realize the regulating and control to medicine nozzle place hydrojet flow for medicine system, and structure is simple, is easy to realize.
Above-mentioned thermal aerosol generator, described check valve comprises the valve body with valve pocket, and valve body comprises can upper valve body, the lower valve body of relative movement; There is the valve block for shutoff valve pocket in valve body, when being provided with normality between valve block and upper valve body or lower valve body, make valve block be in the flexible member of plugging valve cavity-like state; When upper valve body and lower valve body relative movement, the elastic force of flexible member to valve block can be changed, thus change the opening pressure of this check valve.This check valve, adjustment opening pressure is more convenient.
The adjustable thermal aerosol generator upper valve body of above-mentioned medicinal liquid flow is connected by screw thread pair with lower valve body, is relatively rotated, change their relative position, fixed by nut check by upper valve body and lower valve body.
The adjustable pulsed thermal aerosol generator of described medicinal liquid flow, the pipeline bottom medicine-chest and between medicine nozzle is arranged medicinal liquid flow meter and medicine switch; Medicine-chest arranges the manometer for detecting medicine-chest upper pressure.
The adjustable pulsed thermal aerosol generator of above-mentioned medicinal liquid flow, fuel tank top and carburetor bleed ports are connected in parallel on inflator gas outlet, and the bottom of fuel tank communicates with the oil inlet passage being positioned at carburetor throat, arrange the spindle regulating oil inlet passage oil inlet quantity in oil inlet passage.By regulating spindle (being equivalent to accelerator open degree), changing the amount of fuel entered in combustion chamber, changing operating pressure, regulate the flow of liquid.Like this, just by regulating check valve opening pressure and regulate accelerator open degree to regulate medicinal liquid flow simultaneously.
The present invention additionally provides a kind of self-excitation self-priming that relies on simultaneously and realizes the thermal aerosol generator medicinal liquid flow control method regulated medicine nozzle place hydrojet flow for medicine system, and the method is easy and simple to handle, easily controls.
Thermal aerosol generator medicinal liquid flow control method of the present invention, described thermal aerosol generator is above-mentioned thermal aerosol generator, during thermal aerosol generator work, the gas of the pressure fluctuation change that the intermittent combustion in combustion chamber is formed enters into medicine-chest top through carburetor bleed ports, check valve when being in malleation, to liquid pressurization, liquid sprays into jet pipe by medicine nozzle under stress; By adjusting the opening pressure of check valve, regulate the flow of liquid.
Above-mentioned thermal aerosol generator medicinal liquid flow control method, regulates spindle to change the amount of fuel entering combustion chamber, changes operating pressure, regulate the flow of liquid.
Accompanying drawing explanation
Fig. 1 is pulsed thermal aerosol generator medicinal liquid flow adjusting device structural representation of the present invention
Fig. 2 is the structure for amplifying schematic diagram of check valve in Fig. 1
Embodiment
1 test macro
The adjustable thermal aerosol generator of medicinal liquid flow shown in Figure 1, comprises pulse duct, for medicine system; Pulse duct comprises combustion chamber 1, jet pipe 13, spark plug 2, fuel tank 5, carburetor 4 and inflator 6.Combustion chamber sidepiece communicates with carburetor, and fuel tank top and carburetor bleed ports are connected in parallel on inflator gas outlet, and the bottom of fuel tank communicates with the oil inlet passage being positioned at carburetor throat, arranges the spindle 3 regulating oil inlet passage oil inlet quantity in oil inlet passage.
Comprise for medicine system and can regulate the check valve 7 of opening pressure, for detecting the digital display manometer 8 of medicine-chest upper pressure, medicine-chest 9, rotary flowmeter 10, medicine switch 11 and medicine nozzle 12.Carburetor bleed ports, check valve, medicine-chest top are connected successively, bottom medicine-chest by being in series with rotary flowmeter 10, the pipeline of medicine switch 11 is connected with medicine nozzle.24V D.C. regulated power supply provides power supply to digital display manometer 8.
Described check valve 7 comprises the valve body with valve pocket, and valve body comprises and connects into the upper valve body 7-1 that can relatively rotate and move up and down, lower valve body 7-5 by screw thread pair 7-6; There is the valve block 7-2 for shutoff upper valve body internal valve cavity in valve body, when being provided with normality between valve block and lower valve body, make valve block be in the spiral compression spring 7-3 of shutoff upper valve body internal valve cavity.Unclamp nut 7-4, when upper valve body and lower valve body relatively rotate, upper valve body and the upper and lower relative movement of lower valve body, can change the reduction length of spiral compression spring 7-2 and it is to the elastic force of valve block, thus change the opening pressure of this check valve.After adjusting opening pressure, and locking nut 7-4, prevent upper valve body and lower valve body from relatively rotating and moving.
During the work of this pulsed thermal aerosol generator, inflator 6 is squeezed into air and is entered among carburetor 4 and fuel tank 5.Entered the ratio of air in carburetor 4 and gasoline by spindle 3 regulable control, spark plug 2 is lighted a fire, and mixture carries out explosive combustion in a combustion chamber, the high temperature and high speed gas-flow of generation through jet pipe 13, through medicine nozzle 12.Carburetor bleed ports, check valve 7, medicine-chest 9, medicine switch 11 and medicine nozzle 12 together constitute self-excitation self-priming for medicine system, through carburetor bleed ports when the gas of the pressure fluctuation change formed by combustion chamber intermittent combustion is in malleation, enter upper valve body 7-1 inlet end, when admission pressure is greater than the compression stress of spring 7-3, valve block 7-2 is opened, check valve conducting, air-flow enters medicine-chest 9 by pipeline again through lower valve body 7-5 outlet side and applies certain pressure to it.By regulating the length of fit of screw thread between upper valve body 7-1 and lower valve body 7-5 and locking the decrement and pretightning force thereof that can change spring 7-3 with nut 7-4, thus change outlet pressure and medicine-chest pressure.The change of medicine-chest pressure directly causes the change of spray medicine flow, and wherein, medicine-chest pressure is detected by digital display manometer 8 and 24V D.C. regulated power supply, and the measuring junction of digital display manometer 8 is connected with medicine-chest, and carries out the accuracy that seals to ensure measurement; Flow detection adopts the spinner flowmeter 10 that the pressure loss is little, detection range is large.
2 testing programs
Check valve is the critical piece introducing normal pressure in medicine-chest, the initial tension of spring of check valve is regulated by changing amount of spring compression, namely the check valve of different opening pressure is obtained, the forward conduction pressure setting 5 different amount of spring compression corresponding is respectively 2.63,2.81,3.04,3.22 and 3.44kPa, and 1. label is respectively, 2., 3., 4. and 5..
In this test, keep medicine nozzle arrangements constant, namely injection diameter is 3.2mm.By regulating spindle, set 4 accelerator open degrees I, II, III, IV, corresponding fuel consumption is respectively 1.56,1.60,1.64 and 1.65kg/h, and corresponding operating frequency is respectively 115.2Hz, 117.2Hz, 119.1Hz and 121.1Hz.
Conveniently test, the in-built clear water of medicine-chest.Pilot engine, open medicine switch, record medicine-chest pressure and clear water flow simultaneously; Thereafter, Fitting Analysis is carried out to the many groups discrete data recorded, draws the relation between clear water flow and medicine-chest pressure.
For the real-time detection of medicine-chest pressure and clear water flow, the measuring junction of digital display manometer inserts in medicine-chest by this test, and seals, to ensure the accuracy measured.Under non-spray condition, pulsed motor is namely kept to work long hours and do not open medicine switch, when medicine-chest pressure reaches maximum, record numerical value P
max(i.e. maximum medicine-chest pressure).Thereafter, open medicine switch, start spraying, now medicine-chest pressure and clear water flow all can constantly change, until pulsed thermal aerosol generator working stability, namely medicine-chest pressure reaches stationary value time, record stable state medicine-chest pressure P
1.
3 test results and analysis
The relation of 3.1 clear water flows and medicine-chest pressure
When keeping medicine nozzle arrangements constant, by changing accelerator open degree and check valve characteristic, record clear water flow and medicine-chest pressure P
1discrete data as shown in table 1.
Clear water flow under the different medicine-chest pressure of table 1
SPSS statistical software is utilized to analyze result of the test, from operation result, when adopting power function model, R
2be up to 0.986, fitting degree is higher.
Therefore, according to Regression Analysis Result, the relational expression between medicine-chest pressure and clear water flow is:
Q＝19.461·P
0.362
In formula: P-stable state medicine-chest pressure, kPa; Q-clear water flow, L/h.
That is, when medicine Nozzle diameter is constant, clear water flow increases with medicine-chest pressure increase.
3.2 check valve characteristics are on the impact of medicine-chest pressure
During the work of pulsed thermal aerosol generator, by the pressure piping being provided with check valve, in carburetor, draw one gases at high pressure pass into medicine-chest, make liquid level produces normal pressure P, and be constantly changed to maximum medicine-chest pressure P running time with pulsed motor
max.After this, open medicine switch, under the effect of medicine-chest pressure, liquid flows in jet pipe through grug transportation tube, medicine switch and medicine nozzle, and medicine-chest pressure constantly change can be decreased to stable state medicine-chest pressure P
1.
Under different accelerator open degree and check valve conducting pressure, the maximum medicine-chest pressure P recorded
maxwith stable state medicine-chest pressure P
1in table 2.
Utilize SPSS statistical analysis software, with stable state medicine-chest pressure P
1for the conducting pressure p of dependent variable, check valve and pulsed motor operating frequency f are that independent variable carries out multiple regression analysis.
Table 2 medicine-chest pressure (kPa)
From regression equation coefficient and check table: constant term, p, f are to P
1impact extremely significantly nonstandardized technique regression coefficient be respectively-49.197 ,-19.632 and 1.045, its significance Sig. is respectively 0.004,0.000 and 0.000, and regression model is:
P
1＝-49.197-19.632p+1.045f(R
2＝0.969)
In like manner, maximum medicine-chest pressure P
maxwith the regression model between the conducting pressure p of check valve and pulsed motor operating frequency f is:
P
max＝-61.328-20.141p+1.178f(R
2＝0.978)
In formula: P
1-stable state medicine-chest pressure, kPa; P
max-maximum medicine-chest pressure, kPa; P-check valve conducting pressure, kPa; F-operating frequency, Hz.
Analyze known thus:
(1) increase with accelerator open degree, maximum medicine-chest pressure and stable state medicine-chest pressure all increase.Mainly because accelerator open degree is larger, the specific oil consumption increase of pulsed motor combustion and operating frequency larger, and then in combustion chamber, effective pressure is also larger, therefore, the conducting pressure of check valve and medicine nozzle arrangements constant time, medicine-chest pressure can increase gradually.
(2) with the conducting pressure increase of check valve, maximum medicine-chest pressure and stable state medicine-chest pressure all reduce.Mainly because pulsed motor accelerator open degree is constant, then in combustion chamber, effective pressure is constant, and therefore, increase with check valve conducting pressure, medicine-chest pressure reduces gradually.
(3) by formula Q=19.461P
0.362and P
1=-49.197-19.632p+1.045f can draw, by changing the opening pressure of check valve, can change clear water flow.And change less because accelerator open degree changes the operating frequency caused, and the change of operating frequency is less for the change impact of clear water flow.The change of check valve opening pressure is larger than operating frequency for the impact of clear water flow.
Claims (7)
1. the adjustable pulsed thermal aerosol generator of medicinal liquid flow, comprises pulse duct, for medicine system; Pulse duct comprises combustion chamber, jet pipe, spark plug, carburetor, fuel tank and inflator; It is characterized in that: comprise check valve, medicine-chest and the medicine nozzle that can regulate opening pressure for medicine system; Carburetor bleed ports, check valve, medicine-chest top are connected successively, communicate bottom medicine-chest with medicine nozzle.
2. pulsed thermal aerosol generator as claimed in claim 1, is characterized in that: described check valve comprises the valve body with valve pocket, and valve body comprises can upper valve body, the lower valve body of relative movement; There is the valve block for shutoff valve pocket in valve body, when being provided with normality between valve block and upper valve body or lower valve body, make valve block be in the flexible member of plugging valve cavity-like state; When upper valve body and lower valve body relative movement, the elastic force of flexible member to valve block can be changed, thus change the opening pressure of this check valve.
3. the adjustable pulsed thermal aerosol generator of medicinal liquid flow as claimed in claim 2, be is characterized in that: upper valve body is connected by screw thread pair with lower valve body, is relatively rotated, change their relative position, fixed by nut check by upper valve body and lower valve body.
4. the adjustable pulsed thermal aerosol generator of medicinal liquid flow as claimed in claim 1, is characterized in that: the pipeline bottom medicine-chest and between medicine nozzle is arranged medicinal liquid flow meter and medicine switch; Medicine-chest arranges the manometer for detecting medicine-chest upper pressure.
5. the adjustable pulsed thermal aerosol generator of medicinal liquid flow as claimed in claim 1, it is characterized in that: fuel tank top and carburetor bleed ports are connected in parallel on inflator gas outlet, the bottom of fuel tank communicates with the oil inlet passage being positioned at carburetor throat, arranges the spindle regulating oil inlet passage oil inlet quantity in oil inlet passage.
6. thermal aerosol generator medicinal liquid flow control method, it is characterized in that: described thermal aerosol generator is thermal aerosol generator according to claim 1, during thermal aerosol generator work, the gas of the pressure fluctuation change that the intermittent combustion in combustion chamber is formed enters into medicine-chest top through carburetor bleed ports, check valve when being in malleation, to liquid pressurization, liquid sprays into jet pipe by medicine nozzle under stress; By adjusting the opening pressure of check valve, regulate the flow of liquid.
7. thermal aerosol generator medicinal liquid flow control method as claimed in claim 6, is characterized in that: the change of adjustment spindle enters the amount of fuel in combustion chamber by carburetor, change operating pressure, regulate the flow of liquid.
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| CN201510587356.4A CN105052883A (en) | 2015-09-15 | 2015-09-15 | Impulse type thermal aerosol generator adjustable in pesticide flow and pesticide flow adjusting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105724351A (en) * | 2016-01-29 | 2016-07-06 | 成都绿迪科技有限公司 | Garden insecticide sprayer |
| CN113669164A (en) * | 2021-09-06 | 2021-11-19 | 南京林业大学 | Pulse engine combustion stability control system based on artificial intelligence |
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| CN105724351A (en) * | 2016-01-29 | 2016-07-06 | 成都绿迪科技有限公司 | Garden insecticide sprayer |
| CN113669164A (en) * | 2021-09-06 | 2021-11-19 | 南京林业大学 | Pulse engine combustion stability control system based on artificial intelligence |
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Application publication date: 20151118 |
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