JP2006025650A - Blast type chemical fluid spray apparatus with air curtain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blast type chemical fluid spray apparatus that improves adhesion effect of a chemical fluid on inside of crop and prevents scattering of a chemical fluid. <P>SOLUTION: In a chemical fluid spray machine for control which sprays a chemical fluid downward by high-speed air stream of a blower 2 while traveling between field crops, a low-pressure submerged pump 6 arranged in a chemical fluid pump 10 and a distribution pipe 9 as chemical fluid supply piping are connected and a chemical fluid is sent through the distribution pipe 9 and a feed adjustable valve 8 to a chemical fluid discharge pipe 7 attached to the tip of an air blasting duct branch pipe 4. Chemical fluid discharge pressure to the air blasting duct branch pipe 4 is reduced and an air blast pipe 5 for blowing air downward is arranged behind the air blasting duct branch pipe 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air blowing type chemical spraying device that controls the particle size of sprayed droplets and prevents scattering of sprayed droplets in a traveling control machine for agriculture.

2. Description of the Related Art Conventionally, a boom sprayer that pressurizes a chemical solution with a high-pressure pump of 20 to 50 kg / square cm and disperses and refines it from a nozzle is known as a traveling type control machine used for tea trees and vegetables. As the boom sprayer, there is also known an air assist type boom sprayer in which wind is sent from both sides of the nozzle to improve the reachability of the chemical solution. On the other hand, as shown in Patent Document 1, there is a method in which a pesticide is sprayed in a mist form by injecting a chemical solution for control onto a blowing path of a blowing fan without using a high-pressure pump.
JP 2003-310132 A

  The spray droplets of chemicals using conventional high-pressure pumps and high-speed air currents are atomized, so the adherence of the sprayed object to the leaf layer on the crop surface is excellent, but the reach to the leaf layer inside the crop is small. Unevenness of spraying occurs, and a large amount of chemical solution needs to be sprayed. In addition, drifting to other than the scattering object occurs due to natural wind, and contamination of nearby agricultural crops and surrounding rivers becomes a problem. In addition, there is a risk of exposure to pesticides by the sprayer during work.

  The air assist system for preventing the chemical liquid from scattering requires a blower that generates air in addition to the high-pressure pump, and has a drawback that the apparatus is complicated and expensive.

  Accordingly, an object of the present invention is to provide an air blowing type chemical solution spraying device that increases the reachability of a chemical solution to an object to be dispersed, eliminates unevenness of spraying, and prevents scattering of agricultural chemicals.

  In order to solve the above-mentioned problem, in the invention of claim 1, in a chemical solution sprayer for controlling spraying a chemical solution downward from a large number of blower duct outlet branch pipes by a high-speed air stream while running between crops, A pipe that installs a low-pressure submersible pump, connects the submersible pump and the distribution pipe, and sends the chemical solution to the chemical solution discharge pipe attached to the tip of each blowing duct outlet branch pipe through the distribution pipe and the metering valve And a means for lowering the chemical solution discharge pressure. In this invention, the chemical solution discharge pressure is low, and the particle size of the chemical solution by the high-speed airflow can be coarsened. Therefore, high reachability of the sprayed droplets to the inside of the sprayed object can be obtained, and the spraying amount can be reduced to increase the control effect.

  According to the second aspect of the present invention, a means is provided in which an air blowing pipe for blowing air downward is provided behind the air duct branch pipe. In the present invention, since the air curtain is formed in the spraying direction of the sprayed droplets, it can be sprayed without being influenced by natural wind. In addition, air scattering due to a collision with a crop can be suppressed.

  According to the present invention, the particle size of the sprayed droplets is made relatively large, the chemical solution reachability inside the sprayed object is increased, and the spraying unevenness is eliminated, thereby reducing the spraying amount and increasing the control effect. . Further, by suppressing drifting scattering due to natural wind, it is possible to prevent the worker from being exposed to the agricultural chemicals during the spraying of the agricultural chemicals and contamination of the surrounding environment other than the spraying target. In addition, by installing a low-pressure submersible pump in the chemical tank, it has become possible to manufacture piping to the distribution pipe easily and inexpensively.

  Hereinafter, an embodiment of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a sectional view of a detailed view of claims 1 and 2, and FIG. 2 is a plan view. In FIG. 1 and FIG. 2, reference numeral 3 denotes a blower duct, which has a plurality of blower duct branch pipes 4. The air duct branch pipe 4 is inclined for the purpose of spreading inside the crop 12 to be spread. An air outlet pipe 5 having a plurality of air outlets 17 is attached behind the air duct 3 and the air duct branch pipe 4. The blower duct 3 and the air blowing pipe 5 are connected to the blowers 2a and 2b, and the high-speed airflow generated by the blowers 2a and 2b is blown out from the blower duct branch pipe 4 and the air blowing pipe 5.

  A chemical solution discharge pipe 7 is attached to each of the plurality of air duct branch pipes 4. The chemical liquid fed from the low-pressure submersible pump 6 (2.0 kg / square cm 2 or less) installed in the chemical liquid tank 10 reaches the distribution pipe 9 through the pipe 18 and the water feed cock 11. The distribution pipe 9 and the chemical solution discharge pipe 7 are connected via a pipe 19 and a metering valve 8. Accordingly, the discharge pressure of the chemical solution metered by the metering valve 8 is low, and atomization due to the high-speed air current is suppressed, so that the chemical solution can be sprayed as relatively coarse droplets.

  The air blown downward from the air blowout port 17 of the air blower pipe 5 forms an air curtain around the blower duct branch pipe 4, so that the direction of the sprayed droplets is not hindered by natural wind. In addition, since the rebound droplet after the collision with the crop is also guided downward by the air curtain, scattering in the air can be suppressed.

  FIGS. 3 and 4 show an embodiment of the first and second aspects of the present invention, which is attached to the rear portion of the tea garden traveling carriage 13 that can travel with the tea ridges 16 interposed therebetween and used as a tea garden control machine. The blowing type chemical liquid spraying device 1 with an air curtain is fixed to an elevating device 14 that moves up and down, and can adjust the spraying height according to the height of the crop. Further, in the blowing type chemical solution spraying device 1 with the air curtain, the spraying angle can be adjusted by the link mechanism 15.

Sectional drawing of the ventilation type chemical | medical solution spraying apparatus with an air curtain by this invention. FIG. Sectional drawing which attached the blowing type chemical | medical solution spraying apparatus with an air curtain by this invention to the traveling cart for tea gardens. The rear view which attached the blowing type chemical | medical solution spraying apparatus with an air curtain by this invention to the traveling cart for tea gardens.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air blowing type chemical spraying apparatus with air curtain 2a, 2b Blower 3 Blowing duct 4 Blowing duct branch pipe 5 Air blowing pipe 6 Low pressure submersible pump 7 Chemical liquid discharge pipe 8 Metering valve 9 Minute piping 10 Chemical liquid tank 11 Water supply cock 12 Spray target crop DESCRIPTION OF SYMBOLS 13 Tea garden traveling carriage 14 Lifting device 15 Link mechanism 16 Tea ridge 17 Air outlet 18 Piping 19 Piping 20 Duct

Claims (2)

  In a chemical spraying machine for controlling chemicals that sprays chemicals downward by high-speed airflow from a large number of air duct duct branches while traveling between crops, a low-pressure submersible pump is installed in the chemical tank, and the submersible pump and distribution pipe are connected Connected, and through a distribution pipe and a metering valve, constitutes a pipe for sending a chemical liquid to a chemical liquid discharge pipe attached to the tip of each blowing duct outlet branch pipe, and features a low chemical liquid discharge pressure Air blower type chemical spraying device with air curtain.   The blow type chemical spraying device with an air curtain according to claim 1, wherein a blow pipe for blowing air downward is provided behind the blow duct branch pipe.

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