CN101210861A - Medical liquor deposition distribution test device for mobile and horizontal spraying - Google Patents

Abstract

The invention discloses a test device for analyzing medicinal liquid deposition distribution in movable and horizontal spraying, which comprises a movable spraying test stand and a horizontal spraying system positioned above the movable spraying test stand. The horizontal spraying system is composed of a spraying boom, a spray nozzle, a spraying solenoid valve and a spraying control sensor, wherein the spraying system is connected with a spraying controller; and a sprayed medicinal liquid deposition experimental table is disposed below the movement track of the spray nozzle. The inventive test device can test the deposition rules of different sprayed medicinal liquids under different spraying conditions in doors, so as to provide reference for sprayer design. The test device can perform sprayed medicinal liquid deposition performance test of an orchard sprayer capable of selectively spraying or some sprayer horizontally provided with spray nozzles during mechanical movement operation based on an ultrasonic sensor. The invention can rapidly determine the average range, the minimum sprayed medicinal liquid deposition distance, the medicinal liquid deposition range and other spraying parameters of the sprayers under different operational conditions; and can provide control strategy for an automatic sprayer to control the sprayed medicinal liquid deposition range during spraying operation.

Description

Mobile and horizontal spraying herb liquid deposition distribution test device

Technical field

The present invention relates to a kind of at the test unit of analyzing the soup deposition distribution in the mobile and horizontal spraying.

Background technology

On orchard sprayer or some novel remote spraying machines in recent years, level or near-sighted level are laid spray nozzle usually.These spraying machines are to spray in moving and can control in real time spraying, for example the target spraying of ultrasonic listening.These spraying mechanical spray liquor deposition distribution are subjected to translational speed, atomisation pressure, bleed type, the influence of complicated factors such as spraying system design.Understand the spray liquor deposition properties of these spraying mechanical equipment, generally adopt the method for field test.These methods are a lot, for example fluorescence analysis, Flame Image Process, water-sensitive test paper (sensor paper) etc.But field test is subjected to the prevailing circumstances factor affecting, and the experiment work method is loaded down with trivial details, and dissimilar spraying machine spray liquor deposition characteristics do not have comparability.

Summary of the invention

Technical matters to be solved by this invention is to lay defective in the spray nozzle spraying machine design experiment at level, proposes the indoor short-time test device and method of a cover.

For achieving the above object, the technical solution used in the present invention is: a kind of mobile and horizontal spraying herb liquid deposition distribution test device, comprise spraying nigration platform and the horizontal spraying system that is positioned on the spraying nigration platform, spraying system is by spray boom, nozzle, spray solenoid valve, spraying control sensor constitutes, spraying system links to each other with sprayer controller, and the below of nozzle motion track is provided with spray liquor sedimentation experiment platform.

Described spraying nigration platform table top is provided with drive rail, is provided with travelling car in the drive rail, and the guide rail two ends are provided with travel switch, and travelling car is provided with sprocket wheel, and travelling car is in transmission connection by chain and sprocket wheel and drive motor.

Described spray liquor sedimentation experiment table top is equidistantly combined by polylith " V " type frid, and table top vertically is provided with certain pitch angle along groove, and the low angle mouth of " V " type frid is provided with liquid collecting cup.

Adopt technical solutions according to the invention at the indoor deposition rule that just can test spray liquor under the different spray conditions, for the design of spraying machine provides foundation.This test unit can be finished based on the orchard sprayer of selection of ultrasonic spraying or some levels and lay spray liquor deposition properties test in the spraying mechanical mobile operating of nozzle.Determine mean range, the minimum spray liquor deposition distance of spraying machine under the different operating state fast, spray parameters such as soup range of deposition.This test unit can and be adjusted SPRAY MOTION speed in indoor control, atomisation pressure, nozzle setting height(from bottom), spray liquor range of deposition under the different spraying of test such as the angle job state.Can determine the pulverability of spraying mechanical, can provide control strategy, also can carry out wind and help the formula spraying and the windproof design experiment of spraying for the spray liquor range of deposition control of automatic sprayer when spraying operation.

Description of drawings

Figure 1 shows that structural representation of the present invention;

Figure 2 shows that the concrete structure synoptic diagram of spray liquor sedimentation experiment platform among Fig. 1;

Figure 3 shows that spraying control system program flow diagram among the present invention;

Figure 4 shows that test unit is put vertical view when using the present invention to carry out small range test;

Figure 5 shows that test unit is put vertical view when using the present invention to carry out the spraying swath test.

Embodiment

As shown in Figure 1, this test unit comprises spraying nigration platform 9 and the horizontal spraying system that is positioned on the spraying nigration platform 9, and spraying system is by spray boom 5, nozzle 3, spray solenoid valve, and spraying control sensor constitutes, and spraying system links to each other with sprayer controller 4.Spraying system is positioned on the travelling car of drive rail on spraying nigration platform 9 table tops, and the guide rail two ends are provided with travel switch 6, and travelling car is provided with sprocket wheel and is in transmission connection through speed reduction unit 1 with drive motor 2 by chain 8 and sprocket wheel 7.Spray velocity is controlled by drive motor by controller 4.The below of nozzle motion track is provided with spray liquor sedimentation experiment platform 10, concrete structure as shown in Figure 2, spray liquor deposition sampling platform is equidistantly combined by polylith " V " type frid 11, table top is provided with certain pitch angle, the low angle mouth of " V " type frid 11 is provided with liquid collecting cup 12, so that the spray liquor that " V " type frid 11 is collected can flow in the liquid collecting cup 12.

Spray velocity control realizes on spraying nigration platform 9.Nigration platform 9 adopts rail mounted chain transmission.By of the chain tangential movement of a three phase alternating current motor 2 through speed reduction unit 1 driving.Vertical adjustable spray boom 5 is used for fixing shower nozzle 3, solenoid valve and ultrasonic sensor etc.Can adopt frequency converter 4 regulation and control motor speeds, realize control spray velocity.Having installed mechanical trip switch 6 additional at the transfer station two ends is protected.Mechanical trip switch 6 adopts normally closed connection, directly connects with the operation circuit of motor 2.

Spraying system adopts three-cylinder plunger pump, and the atomisation pressure of 2.0-4.5MPa is provided, and as the power drive ram pump, selects for use the three-phase alternating current frequency converter that motor is carried out speed adjustment control with a threephase asynchronous.Work in its power bracket according to ram pump rotating speed and the concern P=f (n) and the threephase asynchronous of output atomisation pressure, its output speed is:

$n=(l-s)\frac{60f_x}{p}$

In the formula: the p number of pole-pairs; The s revolutional slip; f _xSupply frequency

Can set up atomisation pressure controlling models P=F (f _x)

Adopt the test scaling method that the pressure and the frequency relation of the spraying system be made up of spraying machine, frequency converter, pressure transducer and flow sensor etc. are demarcated.Determine the linear relationship that frequency and system pressure exist.

The experiment control system adopts single-chip computer control system to the atomisation pressure in the spray testing system, speed, flow, and integrated flux, solenoid valve is opened, solenoid valve unlatching time accumulative total, test number (TN) is measured control.And the employing human-computer interaction interface, can select and spray testing pressure according to the hydraulic energy nozzle model, select experiment method according to the experimental work button then.Under the different experiments mode, select the required controlled variable of experiment.Static spraying experiment needs to set the spraying duration; The motion spray testing of range of control needs setting speed; Ultrasonic distance control experiment needs to set maximum range of control and the minimum range of control and the SPRAY MOTION speed of spraying.The motion spraying experiment of range of control and ultrasonic distance control experiment can preestablish experiment number.After treating that experiment finishes, system shows the accumulation spray amount according to the flow transmitter of spraying system, total opening time of solenoid valve, spraying such as atomisation pressure experiment parameter.The single-chip computer control system program control flow chart is seen Fig. 3.

It is as follows to use this mobile and horizontal spraying herb liquid deposition distribution test device to do the spray testing method:

The test of research spray liquor deposition distribution divides two aspects, is carry of spray test on the one hand, is the spraying swath test on the other hand.The purpose of small range test is that the research droplet leaves regional extent and the distribution characteristics of soup in spray regime that nozzle flies out.Adjust shower nozzle in the spraying to parameters such as the distance of target or atomisation pressures, the assurance soup drops in the canopy to greatest extent, and does not drop to before and after the target.The nozzle spray direction is vertical in surface level with testing table V-type groove center line during small range test, and the disposing way of spray liquor sedimentation experiment platform 10 is seen Fig. 4.The spraying swath test is to understand to be subjected to atomisation pressure, spray velocity, the deposition distribution situation of spray liquor at spraying command range (target width) spray liquor that influence of lateral airflow.Then the nozzle spray direction is parallel in surface level with V-type groove center line during the spraying swath test, and spray liquor sedimentation experiment platform 10 disposing ways are seen Fig. 5.

Calculate the average carry of spray and standard deviation is respectively by test figure:

$D=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{x_i{v}_i}{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{v}_i}$

${\mathrm{\σ}}_x=\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(x_i-D)}^2\frac{v_i}{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{v}_i}}$

In the formula: D mean range mm; σ _xThe range standard deviation; I test platform trough number; Xi i groove center line hangs down apart from mm to nozzle; Vi i groove liquid medicine collecting amount ml

Soup deposition mean value and standard deviation are respectively:

$v=\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{v}_i$

$s=\sqrt{\frac{1}{n-1}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{(v_i-v)}^2}$

In the formula: v average deposition amount ml; The s standard deviation; I test platform trough number; Vi i groove liquid medicine collecting amount.

The spray liquor deposition uniformity is represented with coefficient of variation Cv $C_v=\frac{s}{v}.$ Be that the big more spray liquor deposition of Cv value is even more, otherwise instead then.

Speed is tested the influence of spray liquor deposition distribution:

Spray velocity not only influences the carry of spray, also can influence distributing at the spraying swath inner liquid medicine in the target spraying of setting spread of spray.Spraying swath several testing tables of when test side by side, nozzle spray direction is parallel in surface level with testing table hydrops groove direction, and is vertical with velocity reversal.Preestablish spread of spray.Collect spray liquor in each testing table V-type groove with graduated cylinder, and spray liquid measure data are handled to analyze the soup distribution situation.

If the distance D (0.1) that nozzle accumulative total is deposited probability 10% place as minimum spraying distance, deposits probability with accumulative total and reaches the spraying distance D (0.9) at 90% place as maximum spraying distance.Spray liquor probability Distribution Model that application is set up calculates that nozzle spray is stressed and the spray liquor range of deposition of spray velocity when influencing.

Following table be certain model spray nozzle at atomisation pressure 1.2Mpa, nozzle is apart from floor level 1350mm, carries out the carry of spray actual tests data of different translational speeds under the spraying range of control 1880mm situation.

Test figure is carried out computing draw following table this model nozzle spray mean range and mean range basis of calculation difference the data of spraying under test condition with the spray velocity variation.

Claims (3)

1. mobile and horizontal spraying herb liquid deposition distribution test device, it is characterized in that comprising spraying nigration platform and the horizontal spraying system that is positioned on the spraying nigration platform, spraying system is by spray boom, nozzle, spray solenoid valve, spraying control sensor constitutes, spraying system links to each other with sprayer controller, and the below of nozzle motion track is provided with spray liquor sedimentation experiment platform.

2. mobile and horizontal spraying herb liquid deposition distribution test device as claimed in claim 1, it is characterized in that described spraying nigration platform table top is provided with drive rail, be provided with travelling car in the drive rail, the guide rail two ends are provided with travel switch, travelling car is provided with sprocket wheel, and travelling car is in transmission connection by chain and sprocket wheel and drive motor.

3. mobile and horizontal spraying herb liquid deposition distribution test device as claimed in claim 1 or 2, it is characterized in that described spray liquor sedimentation experiment table top is equidistantly combined by polylith " V " type frid, table top vertically is provided with certain pitch angle along groove, and the low angle mouth of " V " type frid is provided with liquid collecting cup.

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