JPH1194A - Agrochemical spray apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agrochemical spray apparatus to be loaded on a helicopter to be controlled by a radio, capable of preventing an agrochemical from dropping in a dropwise state from an atomizer while not applying the agrochemical. SOLUTION: In this agrochemical spray apparatus which is loaded on a helicopter 10 controlled by a radio, introduces an agrochemical stored in a tank 1 through a piping with a pump 3 in it to an atomizer 6, atomizes the agrochemical by the atomizer 6 and sprays in the air, a stop valve 5 to be worked by radio control operation is laid between the pump 3 and the atomizer 6. Consequently, the piping 2 is completely closed by the stop valve while not spraying the agrochemical and the stop valve 5 is opened to reduce the flow channel resistance of the piping when the agrochemical is sprayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pesticide spraying device mounted on a radio-controlled helicopter, and more particularly to a device for preventing pesticides from dropping and leaking from an atomizer during non-spraying, and reducing a load on a pump. The present invention also relates to a pesticide spraying device capable of stirring pesticides.

[0002]

2. Description of the Related Art As shown in FIG. 3, for example, a conventional pesticide spraying device mounted on a radio-controlled helicopter 10 includes a tank 101 for storing pesticides, a pipe 102 for drawing out the pesticide from the tank 101, and a pipe 102 for the pesticide. The pump includes an intervening pump 103 and an atomizer 105 connected to a terminal of the pipe 102 for atomizing the pesticide pressurized by the pump 103 and spraying the atomized air.

The pipe 103 is provided with a check valve 104 for preventing the agricultural chemical from being led out to the atomizer 105 during non-spraying. Further, as the pump 103, a pump having a structure capable of controlling the volume, such as a rotary pump for controlling the spray amount of the pesticide, is used.

[0004]

In this conventional pesticide spraying apparatus, the pump 103 and the atomizer 105 are stopped by radio operation during non-spraying, whereby the check valve 105 is closed and the pesticide is wasted from the atomizer 104. It prevents dripping.

However, in practice, it is impossible to prevent so-called dropping, which is a phenomenon in which the pesticide leaks from the check valve 104 during the non-spraying and the pesticide drops from the atomizer 105 and drops.

Further, at the time of spraying, it is necessary to increase the discharge pressure of the pump 103 to a pressure sufficient to open the check valve 104, and there is a tendency that the load on the pump 103 is increased.

Further, there is another problem that components of the pesticide stored in the tank are separated due to a difference in specific gravity or the like, and the concentration becomes non-uniform. This problem becomes remarkable especially when the pump 103 is stopped and the flow of the pesticide in the tank is stopped and the spraying is not performed.

[0008] In addition, when a rotary pump is used as the pump 104, for example, the rotor is quickly removed by solids such as some crystals of the pesticide component generated during non-spraying and powdery or granular pesticide components. The wall of the rotor chamber to be accommodated, the sealing member that partitions the gap between the rotor and the wall of the rotor chamber, etc. are worn out, resulting in insufficient discharge pressure, inability to control flow, and leakage of pesticides. There are also problems, such as ease of use.

In view of the above circumstances, the present invention provides a pesticide spraying apparatus which can prevent a pesticide from dropping and leaking from an atomizer particularly when non-spraying and can reduce a load on a pump. The purpose is to do.

[0010]

According to the present invention, a pesticide mounted on a radio-controlled helicopter 10 and guided to an atomizer 6 via a pipe 2 with a pump 3 interposed between the tank 1 and atomized by the atomizer 6 to air. In order to achieve this object, the following technical means are adopted in the agricultural chemical spraying apparatus for spraying.

That is, a means for interposing a stop valve 5 operated for radio control between the pump 3 and the atomizer 6 of the pipe 2 is adopted. As a result, the pipe 2 is completely closed by the stop valve 5 during non-spraying, so that the pesticide can be prevented from leaking to the atomizer 6 connected downstream of the stop valve 5, and the stop valve 5 is opened during spraying. By performing the valve, compared with the conventional pipe 102 in which the check valve 104 is interposed, the pipe 2
Can be greatly reduced, and the load on the pump 3 can be reduced.

In the present invention, although not particularly limited, a recirculation path 7 for connecting a portion of the pipe 2 between the pump 3 and the stop valve 5 to a tank is provided so that the operation of the pump 3 is continuously performed even when the spraying is not performed. By continuously or intermittently continuing, it is possible to prevent the occurrence of the separation of the components of the pesticide and to prevent the non-uniformity of the pesticide components.

Further, in the present invention, although not particularly limited, the pump 3 is constituted by an impeller pump having little influence on the performance deterioration due to wear of parts, and a flow rate adjusting means is interposed in the pipe so that the amount of the agricultural chemical sprayed can be increased. Is recommended.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pesticide spraying apparatus according to one embodiment of the present invention will be specifically described below with reference to the drawings.

As shown in the front view of FIG. 1, the pesticide spraying apparatus is mounted on a radio-controlled helicopter 1 and stores a pesticide in a tank 1 and a pipe for drawing out a liquid, fine powder, or powdery pesticide from the tank 1. 2, a pump 3 (a maximum discharge rate of 9 liters per minute) interposed in the pipe 2, a flow rate adjusting means 4 capable of arbitrarily adjusting a flow rate, and a stop valve 5.
And an atomizer 6 connected to a terminal of the pipe 2 to atomize the pesticide pressurized by the pump 3 and spray it into the air.
(Each having a maximum spray rate of 4 liters per minute). In addition, the pipe 2 is provided with a recirculation path 7 for connecting a portion between the pump 3 and the stop valve 5 to a tank.

The pump 3 is constantly operated with the pesticide stored in the tank 2, whereby the pesticide is circulated and stirred in the tank 2, the pump 3, and the reflux path 7 in order, and a part of the components is increased in specific gravity. Therefore, the separation of the pesticide is prevented, and the uniformity of the pesticide is ensured.

However, the continuous operation of the pump 3 during non-spraying is not essential to the present invention, and the pump 3 is operated intermittently and the pesticide is intermittently operated unless the uniform circulation of the pesticide is impaired. It may be circulated.

When the spraying is not performed, the stop valve 5
Is closed, whereby the pipe 2 is completely closed on the way, and the leakage of the pesticide to the atomizer 6 connected downstream of the stop valve 5 is prevented.

At the time of spraying, by opening the stop valve 5, the flow resistance of the pipe 2 can be greatly reduced as compared with the conventional pipe 102 having the check valve 104 interposed therebetween. 3 can be reduced, and the pump 3 can be reduced in weight and size and power consumption can be reduced.

As the pump 3, an impeller pump is used which has little effect on the deterioration of the performance due to the wear of the parts. The amount of the agricultural chemical to be sprayed is accurately adjusted by the flow rate adjusting means 4. A known flow control valve is used as the flow control means 4.

The flow rate adjusting means 4 may be provided on the upstream side of the stop valve 5 as long as the flow rate adjusting means 4 is interposed in the portion of the pipe 2 between the branch point to the reflux path 7 and the atomizer 6. , May be provided downstream of the stop valve 5.

[0022]

As described above, according to the present invention, a stop valve operated by radio control is interposed between the pump and the atomizer of the pipe in place of the conventional check valve. By closing the stop valve, it is possible to completely prevent the pesticide from dropping and leaking from the atomizer, that is, to prevent leakage of the pesticide.

Further, at the time of spraying, by closing the stop valve, the flow path resistance of the pipe can be reduced and the load on the pump can be reduced, and the pump can be reduced in weight, size and power consumption. be able to.

In the present invention, the pump may be operated continuously or intermittently during non-spraying, particularly when a return line is provided for connecting a pipe portion between the pump and the stop valve to the tank. Thereby, the pesticide in the tank can be circulated through the tank, the pump, and the reflux path, whereby the pesticide can be agitated and the uniformity of the components can be ensured.

In the present invention, in particular, if the pump is constituted by an impeller pump, it is possible to reduce the influence of performance deterioration such as a decrease in discharge pressure due to wear of the parts of the pump. If the flow rate adjusting means is provided, it is possible to accurately adjust the pesticide application amount regardless of the wear of the pump components.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a piping configuration diagram of the present invention.

FIG. 3 is a front view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Piping 3 Pump 4 Flow control means 5 Stop valve 6 Atomizer 7 Reflux path 10 RC helicopter

Claims (3)

[Claims] 1. A pesticide spraying apparatus mounted on a radio-controlled helicopter, which guides the pesticide stored in a tank to an atomizer through a pipe interposed with a pump, atomizes the atomized atomizer, and sprays the atomized air. A pesticide spraying apparatus characterized in that a stop valve operated by radio control is interposed between the apparatus and the control valve. 2. A recirculation path for connecting a portion of a pipe between the pump and the stop valve to a tank is provided.
A spraying device for agricultural chemicals according to any one of the above. 3. The agricultural chemical spraying apparatus according to claim 1, wherein the pump is an impeller pump, and a flow rate adjusting unit is interposed in the pipe.