JP2005087067A - Electrostatic application type applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic application type applicator with which a chemical fluid, etc., are sufficiently applied not only to the upper part (the surface of a leaf, etc.) but also to the lower part (the back of a leaf, etc.) of a field crop without reducing safety and increasing an application amount. <P>SOLUTION: In the electrostatic application type applicator (10) with which a main pipe (12) of a nozzle boom, etc., is equipped with spray nozzles (20) at fixed intervals and a chemical fluid sprayed from the spray nozzles (20) is provided with electric charge from electrostatic application electrodes (30), connection pipes (15) are connected to or suspended from the main pipe (12) at fixed intervals and the spray nozzles (20) are attached to the connection pipes (15) in a state that the spray directions (S) of the spray nozzles (20) are inclined at a fixed angle (α) to a vertical line (g). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electrostatic applicator, and more particularly, a pesticide sprayed from a spray nozzle at a predetermined interval on a main pipe such as a nozzle boom of a traveling boom sprayer, The present invention relates to an electrostatic application spreader configured to apply an electric charge from an electrostatic application electrode to a fertilizer or the like (hereinafter referred to as a chemical solution or the like).

  For example, as can be seen in Patent Documents 1 and 2 below, the spray nozzle is directly directed downward (to be along a vertical line) at a predetermined interval on a main chemical liquid tube such as a nozzle boom extending in the left-right direction of the traveling boom sprayer. To the atomizing state of the sprayed nozzle by supplying a high voltage pulse to the electrostatic applying electrode. Electrostatic applicators that are adapted to impart charge are known.

  Such an electrostatic application spreader is usually provided with an electrostatic application circuit as shown in FIG. 3, for example. In the illustrated electrostatic application circuit 1, a transistor 4 connected to the battery 2 is driven by a pulse output from a trigger circuit 3 driven by a battery 2 as a power source, and a pulse voltage output from the transistor 4 is boosted. The voltage is boosted by the transformer 5, and a high voltage pulse is supplied to the electrostatic application electrode 7 through the rectifier diode 6. As the trigger circuit 3, a trigger voltage circuit or a transmission circuit that outputs a trigger voltage induced by the trigger coil in synchronization with the rotation of the internal combustion engine is used.

In the electrostatic application spreader configured as described above, the entire main drug solution pipe (airframe) is usually moved in the front-rear direction with the main drug solution pipe (spray nozzle) disposed above the crop. A high voltage from the electrostatically applied electrode is applied to the atomized chemical solution or the like sprayed and diffused in a fan shape or a cone shape from the spray nozzle nozzle. Because of its electrostatic adhesion effect, the adhesion of chemicals and the like to crops can be improved, and the effects of extermination and sterilization of pests on the leaves of the crops can be enhanced. It becomes possible to reduce the amount of spraying per unit area of chemicals and the like.
JP 2001-232255 A (1st to 6th pages, FIGS. 1 to 4) JP 2001-300362 (pages 1 to 4, FIGS. 1 to 4)

  However, in the conventional electrostatic application spreader as described above, the spray nozzle is directly attached to the main chemical solution pipe so as to spray the chemical solution or the like from above the crop. Although the chemicals sprayed from the above are likely to adhere to the upper part of the crop, they are difficult to adhere to the lower part of the crop. In particular, in tall crops such as leek and rice, the upper part (upper surface such as leaves) has good adhesion, but the lower part (back surface such as leaves) has poor adhesion, and the front and back (or top and bottom) of leaves etc. As a result, the amount of adhesion varied greatly, and there was a problem that a pest control effect and a bactericidal effect could not be obtained sufficiently.

  In this case, for example, if the voltage supplied to the electrostatic application electrode is made higher, the spray chemical solution or the like can easily reach the back surface of the leaf and the adhesion is improved, but the voltage supplied to the electrostatic application electrode is increased. If it is high, an electric shock accident or the like is likely to occur, and safety is lowered.

  The present invention has been made to solve the above problems, and the object of the present invention is to remove the chemical solution or the like on the upper part of the crop (the upper surface of the leaf etc.) without reducing the safety and without increasing the spraying amount. ) As well as the lower part (the back side of the leaves, etc.).

  In order to achieve the above object, the electrostatic application spreader according to the present invention basically has spray nozzles arranged at a predetermined interval in a main pipe such as a nozzle boom, and sprays from the spray nozzles. A charge from a static electricity applying electrode is applied to a chemical solution to be applied, and a connecting pipe is connected to or suspended from the main pipe at a predetermined interval, and the spray nozzle is attached to the connecting pipe. It is a feature.

In a preferred aspect, the connecting pipe is suspended from the main pipe, and the spraying direction of the spray nozzle is inclined at a predetermined angle with respect to a vertical line.
In another preferred embodiment, a pair of left and right spray nozzles are attached to the one connecting pipe, and in another preferred embodiment, a nozzle connection holding body is attached to a lower end portion of the connecting pipe, and the nozzle connection A pair of left and right spray nozzles are attached to the holding body.

  Furthermore, in another preferred embodiment, a first stage spray nozzle is attached to the main pipe via the connecting pipe, and a second stage spray nozzle is attached to the lower side of the first stage spray nozzle. It is done.

  In another preferred embodiment, a pair of upper and lower electrostatic application electrodes are arranged opposite to the one spray nozzle, and in another embodiment, the connecting pipe, the spray nozzle, and the nozzle connection holding A step-up transformer for supplying a high voltage pulse to the electrostatic application electrode is attached to one of the bodies.

  In the electrostatic application spreader according to the present invention, a connecting pipe is connected or suspended at a predetermined interval to a main pipe such as a nozzle boom, and the spraying direction of the spray nozzle is inclined at a predetermined angle with respect to the vertical line. Since it is attached in the squeezed state, a chemical solution or the like can be sprayed laterally or obliquely downward from the side of the crop. For this reason, even if the crop is tall, such as leek or rice, the chemical solution is necessary not only for the upper part (the upper surface of the leaves, etc.) but also for the lower part (the rear surface of the leaves, etc.) It can be made to adhere uniformly, and as a result, a pest control effect and a bactericidal effect can be sufficiently obtained, and a spray amount per unit area of a chemical solution or the like can be reduced.

In addition, since it is not necessary to increase the voltage supplied to the electrostatic application electrode, the safety is not lowered and the apparatus cost can be kept low.
Furthermore, since a pair of left and right spray nozzles are provided for one connecting pipe, it is possible to rationally and efficiently spray a chemical solution or the like from both sides of the crop planted in the basket.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a state in which a chemical solution spraying operation is performed by an embodiment of the electrostatic application type sprayer according to the present invention.

  The electrostatic application spreader 10 shown in the figure is a main chemical liquid tube for supplying a chemical liquid pumped by a pump from a chemical liquid tank provided in a self-propelled airframe (not shown) to a spray nozzle 20 described later. The nozzle boom 12 is provided. The nozzle boom 12 can selectively take a horizontal state extending in the left-right direction (when spraying) and a vertical state rotated 90 ° from the horizontal state, and the height position in the horizontal state can be determined. It can be adjusted (elevated) according to the height of the crop (here, leek) C.

  A predetermined number of connecting pipes 15 are suspended from the nozzle boom 12 via a branch connector 14 at predetermined intervals along the length direction (left-right direction). The connecting pipe 15 is suspended from the nozzle boom 12 as shown in the figure during the spraying operation, and is folded along the nozzle boom 12 when the nozzle boom 12 is in a vertical state.

  An inverted T-shaped nozzle connection holding body 16 is attached to the lower end of each connecting pipe 15, and the spray nozzles 20 are attached to the left and right of the lower part of the nozzle connection holding body 16.

The connecting pipe 15, the nozzle connection holding body 16, and the pair of left and right spray nozzles 20, 20 constitute a first stage, and the lower end portion of the first stage nozzle connection holding body 16 has a second part. The connecting pipe 15 at the stage is connected, and the same nozzle connection holding body 16 and the pair of left and right spray nozzles 20 and 20 are attached to the connecting pipe 15 as in the first stage.
Here, the spraying direction S of each spray nozzle 20 is inclined at a predetermined angle α (for example, about 60 °) with respect to the vertical line g.

  A chemical solution is pumped to the first pair of left and right spray nozzles 20, 20 via the nozzle boom 12, the branch connector 14, the connecting pipe 15, and the nozzle connection holder 16, The pair of left and right spray nozzles 20 and 20 in the second stage are also connected to the connecting pipe 15 and the nozzle connection holding body 16 (bottom of the bottom stage) from the bottom of the nozzle connection holding body 16 in the first stage. The chemical solution is pumped through each of the spray nozzles 20 and is sprayed and diffused in a fan shape (or cone shape) having a central angle θ of, for example, about 80 °. Then, the sprayed and diffused chemical liquid (chemical liquid spray P) is sprayed onto the crop C.

  A pair of upper and lower electrostatic application electrodes 30, 30 are arranged opposite to each other in parallel with the spray nozzle 20 in order to charge the chemical spray P sprayed and diffused from each spray nozzle 20. As can be understood with reference to FIG. 2, the electrostatic application electrode 30 includes an electrode bar 32 and an electrode cover 34 made of an insulating material into which the electrode bar 32 is inserted. One end portion (tip portion) 32a of the pointed tip is exposed from the tip end portion 34a (cut obliquely for draining water) of the electrode cover 34, and is formed on the other end of the electrode rod 32. The small-diameter portion 32b is mechanically and electrically connected to a high-voltage electric cord 45 that is liquid-tightly fitted into the rear end portion 34b of the electrode cover 34. The electrode cover 34 is inserted into an insertion hole 28 a formed in the mounting plate 28 fixed to the spray nozzle 20 and is screwed into the outer periphery of the electrode cover 34 by a pair of nuts 36, 36. The mounting plate 28 is fixedly held. In this case, the attachment position of the electrostatic application electrode 30 with respect to the attachment plate 28 is adjusted so that the tip end portion 32a of the electrode bar 32 is disposed in the vicinity of the side edge Pa of the chemical spray P.

  The electrostatic application electrode 30 only needs to be provided for one spray nozzle 20, but by providing a pair of upper and lower portions as shown in the drawing, the electric field can be expanded in the vertical direction, and the adhesion efficiency of the chemical solution is increased. Is more preferable.

  Moreover, in order to supply a high-voltage pulse of about 22 to 23 kV to the electrostatic application electrodes 30 and 30 on the front and rear side surfaces of the nozzle connection holders 16 and 16 in the first stage and the second stage, respectively. The step-up transformer 40 is attached. In order to reduce leakage and voltage drop as much as possible, the electrostatic application electrode 30 (the electrode bar 32) is connected to the step-up transformer 40 via the extremely short high-voltage cord 45 and a rectifier diode (not shown). The secondary coil is connected. Further, the primary coil of the step-up transformer 40 is connected via a low-voltage cable 44 to a control knit (not shown) provided on the machine body side as shown in FIG.

  In the electrostatic application spreader 10 of this embodiment configured as described above, as shown in FIG. 2, the pair of left and right spray nozzles 20, 20 are provided on the side of the upper part of the crop C (left and right crops). While moving the nozzle boom 12 (airframe) in the front-rear direction while adjusting the height position and the horizontal position of the nozzle boom 12 so as to be located between C, that is, between the ribs) In this case, the electric spray from the electrostatic application electrode 30 is effectively applied to the atomized chemical spray P sprayed and diffused from the spray nozzle 20 in a fan shape or a cone shape. Is done.

  In this case, since the chemical solution is sprayed in a fan shape or a cone shape on the left and right sides of the crop C, even if the crop C is tall such as leeks or rice, the chemical is applied to the top of the crop C ( It can be attached not only to the upper surface of leaves etc.) but also to the lower part (back side of leaves etc.) in a necessary and sufficient manner, resulting in sufficient pest control and bactericidal effects. It becomes possible to reduce the application amount per unit area.

In addition, since it is not necessary to increase the voltage supplied to the electrostatic application electrode, the safety is not lowered and the apparatus cost can be kept low.
Furthermore, since the pair of left and right spray nozzles 20 and 20 are provided for one connecting pipe 15, the chemical solution can be rationally and efficiently sprayed on the crop C planted in the basket.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be used without departing from the spirit of the invention described in the claims. It can be changed.

The figure which shows a mode that the chemical | medical solution dispersion | spreading operation | work is performed by one Embodiment of the electrostatic provision type sprayer which concerns on this invention. The partial notch enlarged view of the spray nozzle and electrostatic application electrode periphery part which are used with the electrostatic application type sprayer shown by FIG. The circuit diagram which shows an example of the electrostatic provision circuit with which an electrostatic provision type spreader is equipped.

Explanation of symbols

10 ... Electrostatic application type spreader 12 ... Nozzle boom (main pipe)
DESCRIPTION OF SYMBOLS 15 ... Connecting pipe 16 ... Nozzle connection holding body 20 ... Spray nozzle 30 ... Electrostatic provision electrode 40 ... Boosting transformer g ... Vertical line alpha ... Inclination angle of spray nozzle S ... Injection direction

Claims (7)

A spray nozzle (20) is disposed at a predetermined interval in a main pipe (12) such as a nozzle boom, and charges from the electrostatic application electrode (30) are applied to a chemical solution sprayed from the spray nozzle (20). In the electrostatic application spreader (10) adapted to be applied,
An electrostatic application type characterized in that a connecting pipe (15) is connected to or suspended from the main pipe (12) at a predetermined interval, and the spray nozzle (20) is attached to the connecting pipe (15). Spreader.   The connecting pipe (15) is suspended from the main pipe (12), and the spray direction (S) of the spray nozzle (20) is inclined by a predetermined angle (α) with respect to the vertical line (g). The electrostatic application spreader according to claim 1.   The electrostatic sprayer according to claim 1 or 2, wherein a pair of left and right spray nozzles (20, 20) are attached to the one connecting pipe (15).   A nozzle connection holding body (16) is attached to a lower end portion of the connecting pipe (15), and a pair of left and right spray nozzles (20, 20) are attached to the nozzle connection holding body (16). The electrostatic application type sprayer according to any one of claims 1 to 3.   A first stage spray nozzle (20) is attached to the main pipe (12) via the connecting pipe (15), and a second stage spray nozzle (20) is provided below the first stage spray nozzle (20). The spraying nozzle (20) is attached, The electrostatic application type sprayer as described in any one of Claim 1 to 4 characterized by the above-mentioned.   6. The electrostatic according to claim 1, wherein a pair of upper and lower static electricity applying electrodes (30, 30) are disposed opposite to the one spray nozzle (20). Granting spreader.   A step-up transformer (40) for supplying a high voltage pulse to the electrostatic application electrode (30) to any one of the connecting pipe (15), the spray nozzle (20), and the nozzle connection holder (16). Is attached, The electrostatic application type spreader according to any one of claims 1 to 6.

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