JPH11113336A - Chemical solution mixing apparatus for applicator of movable vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply mix a chemical solution of an accurate chemical solution concentration in a movable applicator for an agrochemical or the like. SOLUTION: In this applicator of a movable vehicle for sending water and a chemical to a chemical solution tank 1 while separately detecting the water and the chemical solution by supply amount sensors 2 and 3, mixing with stirring and applying the chemical solution, control valves 4 and 5 for automatically adjusting the amount of water or the chemical solution supplied while detecting the chemical solution concentration in the chemical solution tank 1 based on the detection of the supply amount sensors 2 and 3 are installed so as to maintain the concentration at a set concentration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical dispensing apparatus for dispensing a chemical solution in a mobile sprayer in which a chemical sprayer is mounted on a mobile vehicle such as a tractor. It can also be used for fertilizer application equipment.

[0002]

SUMMARY OF THE INVENTION In a chemical sprayer,
In order to eliminate waste of chemicals, there is a technology in which a water tank and a chemical tank are separately mounted on a vehicle body, and water and a chemical supplied from these tanks are mixed and sent to a nozzle while spraying. It is difficult to obtain the chemical concentration.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a moving vehicle spraying machine which supplies water and medicine into a chemical tank 1 while detecting them by supply amount sensors 2 and 3, respectively, and agitates and mixes to spray the chemical. And a control valve for automatically adjusting the supply amount of the water or the chemical so as to maintain the concentration at a set concentration while detecting the concentration of the chemical in the chemical tank 1 based on the detection of the supply amount sensors 2 and 3. The configuration of a chemical solution preparation device provided with 4, 5 is provided.

[0004]

The water and the chemical are separately supplied to the chemical liquid tank 1 via the control valves 4 and 5, and are agitated. The concentration of the chemical in the chemical tank 1 is adjusted to a preset concentration. When the water and the chemical are supplied to the chemical tank 1, the supply amounts are detected by the supply amount sensors 2 and 3. Therefore, it is calculated based on the detection of the supply amount sensors 2 and 3. When the calculated chemical concentration in the chemical tank 1 is larger or smaller than the set concentration range, the control valve 4 or 5
However, the amount of water or the amount of medicine is adjusted so as to be in a set concentration range. For this reason, the chemical solution is easily prepared in the mobile vehicle, and an accurate chemical solution concentration can be maintained.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor body 6 is a four-wheel drive running type in which a front wheel 9 and a rear wheel 10 are driven by an engine 8 mounted on a front portion of the vehicle by steering with a steering handle 7. The tank 11, the chemical tank 12, the chemical tank 1, etc. are arranged around the cockpit 13, and a pump 14 for sucking the chemical in the chemical tank 1 is provided at the rear of the vehicle body 6. Between the tank 12 and the chemical liquid tank 1, control valves 4 and 5, each of which is an electromagnetic solenoid valve operated by an output from the controller 15, and detects the amount of water or the amount of medicine flowing out of each of the control valves 4, 5. Then, supply amount sensors 2 and 3 for inputting to the controller 15 are provided. Each of the control valves 4 and 5 has an adjustment handle 16,1.
7, the outflow can also be adjusted manually.

[0006] A stirring blade 19 driven by a motor 18 is provided at the bottom of the chemical tank 1 so that the water supplied by the control valve 4 and the chemical supplied by the control valve 5 can be supplied into the chemical tank 1. The mixture is stirred and mixed to obtain a chemical solution. A setting indicator 21 is provided on the input side of the controller 15 via a communication line 20 to set the mixing concentration of the drug in the drug solution and to control the control valves 4 and 5 at the start and end of the drug solution preparation. It has a start switch, a stop switch, and other various operation switches for performing opening and closing operations.

A center boom 24 on which a nozzle 23 is disposed is supported by a lift link 22 at a front portion of the vehicle body 6. Reference numeral 25 denotes a support rod for supporting the center boom 24. Reference numeral 26 denotes a telescopic lift cylinder, which is a geared motor that moves the lift link 22 up and down. At both left and right ends of the support rod 25, a support arm 28 that can rotate left and right around a rotation pin 27 is provided to hold a side boom 29 on which the nozzle 23 is disposed. Reference numeral 30 denotes a support arm 28
It is a folding cylinder that rotates seven times.

A hose 31 for supplying a chemical from the pump 14 is connected to the center boom 24 and the left and right side booms 29. Reference numeral 32 denotes a chemical solution supply hose for supplying the chemical solution from the chemical solution tank 1 to the pump 14, and has a filter 33. 34 is a drive shaft for driving the pump 14, 35 is a control valve, 36 is a residual liquid hose for returning the residual liquid in the tank 1, 37
Is an accumulator, 38 is a switching valve, and 39 is an on-off valve that opens and closes electromagnetically.

Water is injected into the water tank 11 and a chemical is injected into the chemical tank 12, and the tractor is operated to spray the chemical on the soil surface or the crop in the field. The concentration of the target chemical is set on the setting display 21, and the amount of the liquid to be sprayed is set at the same time to start spraying the chemical. At this start, the control valves 4 and 5 adjust the supply amount of the chemical liquid tank 1 from the water tank 11 and the chemical tank 12 to approximately one third of the adjustment amount.
open.

When the chemical solution mixing control is started, the controller 15 operates according to the flow shown in FIG. The ratio between the amount of water and the amount of medicine in the medicinal solution in the medicinal solution tank 1 is determined by the concentration set value and the spray amount set value by the setting display 21 and the flow rate detection values of water and medicine by the supply amount sensors 2 and 3,
That is, the chemical solution concentration and the chemical solution amount are calculated. When the calculated concentration of the liquid medicine and the amount of the liquid medicine (flow) are compared with the above-mentioned concentration and amount of the medicine, and the concentration is too low, the control valve 4 on the water tank 11 side is throttled or the adjustment on the side of the chemical tank 12 is adjusted. Opening the valve 5 brings the concentration closer to the set concentration. On the other hand, when the density is too high, the control valve 5 is throttled or the control valve 4 is opened to approach the set density. Further, the amount of the chemical solution is adjusted by operating the two control valves 4 and 5 at the same time.

As described above, the control valves 4 and 5 for separately controlling the supply amounts of water and the chemicals, while detecting the supply amounts by the supply amount sensors 2 and 3, bring the detected chemical concentration close to the set concentration. As described above, the control of the preparation of the chemical solution is performed, so that the detection or control of the concentration of the chemical solution is easily performed. For example, a special sensor for detecting the concentration of the chemical solution while sampling the chemical solution in the chemical solution tank 1 is not required. or,
Supply of water, medicine, and the like to the water tank 11 and the medicine tank 12 is also simplified and facilitated. The chemical tank 1 also has a small volume, so that useless use of chemicals can be reduced.

[0012] The drug may be not only a liquid but also a powder. Further, as the medicine to be injected into the medicine tank 12, a substance which is previously mixed with water and diluted to a predetermined concentration may be used. In particular, in the case of powders and granules, it is easy to use if they are mixed with water in advance to be converted into a liquid. In FIG.
The difference from the above example is that a color sensor 40 capable of detecting the color of the crop in the field scene A several meters ahead of the vehicle body 6 is provided, and the detection of the color sensor 40 is input to the controller 41, for example, green. The spray amount per unit traveling distance of the chemical solution is determined from the concentrations in several stages, and the spraying amount is adjusted by performing the chemical solution mixing control. The amount of chemicals and fertilizer applied can be adjusted according to the growth of the crop.

FIG. 7 is different from the above example in that the safety frame 42 has a configuration in which the water tank 11, the chemical solution tank 1 and the like have a configuration in which the rear periphery of the cockpit 13 is surrounded in a concave shape.
Is configured to protrude upward from the inner peripheral side of the tank 11 and to project right and left outward at the upper part of the tank 11. A support frame 43 for supporting the safety frame 42 is connected to a seat support frame 44 for supporting the cockpit 13 by a connecting rod 45 for reinforcement.

The safety frame 42 is in the form of a C-shaped loop, and its left and right ends can be turned up and down around a lateral pin 47 at the upper end of the upper support frame 46. A final housing 50 having rear wheels 10 is connected to both left and right ends of a rear axle housing 48 at the rear of the vehicle body 6 with a spacer housing 49 interposed therebetween. The lower end of the lower support frame 43 is attached to and supported by the spacer housing 49.

The left and right ends of the seat support frame 44 are connected to the lower support frame 43 by brackets 51.
The left and right upper ends of the support frame 43 are connected by a connecting rod 45 having an L-shaped cross section. Further, an intermediate portion of the connecting rod 45 is connected to an upper portion of the seat support frame 44. Thereby, the rigidity of the lower support frame 43 is increased.

The upper supporting frame 46 is connected to a connecting rod 45 on the lower supporting frame 43. This connecting rod 4
Numeral 5 is obtained by superimposing the members having the same L-shaped cross section and integrating them. The left and right upper support frames 46 are configured such that the upper ends are inclined outward and rearward so as to conform to the inclination of the inner peripheral side surface of the tank 11, and the left and right upper ends are connected by a connecting rod 52. In such a support configuration, the safety frame 42 mounted on the upper support frame 46 is located immediately above the tank 11 to maintain safety for the operator on the cockpit 13.

[Brief description of the drawings]

FIG. 1 is a block diagram of a chemical solution mixing device.

FIG. 2 is a flowchart thereof.

FIG. 3 is a block diagram of a chemical spraying unit.

FIG. 4 is a side view.

FIG. 5 is a plan view.

FIG. 6 is a side view of a tractor showing a partly different embodiment, and a block diagram and a flowchart of chemical solution preparation control.

FIGS. 7A and 7B are a side view and a front view of a vehicle body chemical solution tank part showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chemical liquid tank 2 Supply amount sensor 3 Supply amount sensor 4 Control valve 5 Control valve

Claims (1)

[Claims] 1. A moving vehicle spraying machine which supplies water and a medicine into a chemical liquid tank 1 while separately detecting them with supply amount sensors 2 and 3 and agitates and mixes to spray a chemical liquid. The control valves 4 and 5 for automatically adjusting the supply amounts of these water or chemicals so as to maintain this concentration at a set concentration while detecting the chemical concentration in the chemical solution tank 1 based on the detection at 3.
A chemical solution dispensing device comprising: