JPH0448819Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention is mainly used when spraying agricultural fumes onto crops, by charging the sprayed smoke particles with a high voltage and electrostatically spraying them against the crops (diseases and pests) to improve the adhesion efficiency of the smoke. The present invention relates to a chemical dispersion device for fumigants which is improved.

[Conventional technology]

Conventionally, the spraying technology for spraying fumigants into greenhouses and other greenhouse horticulture rooms involves diffusing the smoked chemicals inside the greenhouse, causing the smoked particles to settle due to gravity and some of them to be sprayed. It was meant to attach to things.

[Problem that the invention attempts to solve]

By the way, in the above-mentioned conventional smoke spraying technology, the smoke particles settle under their own weight and attach to the crops, so most of the smoke particles stick to the surface of the leaves of the crops, and do not reach the undersides of the stems or leaves. There was a problem that the spraying effect was not reliable due to poor adhesion.

[Means to solve the problem]

The present invention was made to solve the above problems, and a metal wire is arranged inside a rotationally symmetrical metal cylinder along its length via an electrical insulator. The anode or cathode of a high-voltage power supply is connected to the metal wire, and a blower is placed at one end of the metal tube, and a smoke generating section for a fumigant is provided between the metal tube and the blower to emit smoke and air. It is characterized in that it is sucked and passed through a metal cylinder, with the other end of the metal cylinder serving as a discharge port.

[Effect]

With the above configuration, the smoke agent dispersion device of the present invention charges the smoked drug particles to be sprayed to a high voltage, and each particle charged at the cathode or anode has a polarity opposite to the two poles. The chemical (pesticides) is adsorbed onto the crops to be sprayed, and the chemical (pesticides) is deposited not only on the surface of the leaves of the crops, but also on the undersides of the leaves, stems, etc.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a metal wire, and this metal wire 1 is fixed at the radial center position of a metal cylinder 3 via electrical insulators 2, 2, and a high voltage is applied to this metal wire 1. A DC high voltage power supply 10 is connected to supply positive or negative high voltage electricity. The opposite polarity, that is, negative or positive electricity of this DC high voltage power supply 10 is grounded at a grounding part 11, and the metal tube 3 is also grounded at a grounding part 12. The metal tube 3 has a rotationally symmetrical shape, and its cylindrical surface shape, as shown in FIG. 4, includes a continuous smooth surface a, a lattice surface b, a mesh surface c, and Any shape such as the porous surface d may be used, as long as it improves the discharge efficiency. Further, the metal tube 3 is supported and protected by outer circumferential tubes 4 and 5 that also support the electrical insulator 2. In FIG. 1, reference numeral 13 denotes a blower driven by a prime mover (not shown), and its discharge pipe 14 is removably provided with a circular pipe-shaped joint pipe 15 made of synthetic resin. On the distal end side of this joint pipe 15, there is a second
One end of the blow pipe 6 shown in the figure is connected, and a suction pipe 7 is disposed between the blow pipe 6 and the metal cylinder 3. A tongue-like protrusion 17 is provided in the air pipe 6 so as to generate a negative pressure between the air pipe 6 and the air blown from the air blower 13. In addition, a narrow air inlet 18 is provided between the outer cylinder 4 connected to the metal cylinder 3 and the suction pipe 7, so that air flows from the blower pipe 6 to the metal cylinder 3.
When passing through the metal tube 3, external air is sucked in and blown out from the air inlet 18 to increase the wind speed near the cylindrical wall of the metal tube 3. A firework section 8 is provided below the suction pipe 7 to emit smoke from the fuming agent. The smoke particles emitted from the smoke part 8 are distributed between the blower pipe 6 and the suction pipe 7.
When the metal wire 1 is introduced into the metal tube 3 through the gap 16 and passes through the metal tube 3 along the metal wire 1, the voltage is applied between the metal wire 1 and the metal tube 3 by the high voltage power supply 10. Depending on the discharge phenomenon that occurs, it will be charged with a positive or negative charge. The charged smoke particles are then released from the outlet 19 provided at the tip of the metal tube 3 by continuous air from the blower 13 connected to the blast pipe 6, and are sprayed onto the crops to be controlled. It's summery. The thus configured fuming agent dispersing device is used, for example, to control pests and diseases of agricultural products grown indoors in indoor horticulture such as greenhouses. The smoke particles emitted from the smoke part 8 are discharged through the pressure air sent from the blower 13 through the discharge pipe 14, the joint pipe 15, the blow pipe 6, the outer circular pipe 4, the metal cylinder 3, and the outer cylinder 5. When being discharged to the outside from the outlet 19, the high voltage electricity from the DC high voltage power supply 10 supplied to the metal wire 1 is sucked together with the outside air by the negative pressure generated in the suction pipe 7, and the high voltage electricity from the DC high voltage power supply 10 supplied to the metal wire 1 is passed through the metal tube 3. A corona discharge is generated between the cylinder 3 and the smoke particles are charged by ion bombardment, and the smoke particles are charged with a positive or negative charge.
released from. The emitted smoke particles are electrostatically deposited (adsorbed) on agricultural products that have an electrode opposite to the charged electrode of the smoke particles. Therefore, on agricultural crops, fumigants are adsorbed not only on the surface of leaves, but also on the underside of leaves, stems, and other parts of the plant, resulting in good adhesion efficiency, which not only reduces the loss of pesticide spraying, but also reduces the environmental impact caused by pesticides. Pollution can also be reduced. The second embodiment of the present invention shown in FIG.
This embodiment has the same structure as the first embodiment, except that a fuming section 9 for emitting fuming agents is provided in the blast pipe 6. The same pest control work as in the first embodiment can also be performed with the apparatus of this second embodiment. When performing pest control work using the apparatuses of the first and second embodiments, when the fumigant is turned into smoke and sprayed with a charge, the metal cylinder 3 is used in order to efficiently charge the smoke particles in the metal cylinder 3. It is necessary to set the wind speed in 3 to 20 to 50 m/s and the discharge current to about 100 to 200 μA. The graph shown in Figure 5 shows the adhesion rate A on the leaf surface and the adhesion rate A on the underside of the leaf using the device of this invention when the smoke agent is sprayed from one end of the house to the other in a closed house. A' is compared with the adhesion ratio B on the leaf surface and the adhesion ratio B' on the underside of the leaf using a conventional device that does not have a charging mechanism, and as is clear from the graph, the difference is obvious. In addition, in A and A', the concentration of charged smoke particles becomes higher as the position is closer to the device, and a space charge effect occurs, resulting in a higher adhesion rate, but the adhesion rate is sufficient even at the edge of the house. , B and B′, and especially the attachment rate on the underside of the leaves.
A' was comparable to the adhesion rate A on the leaf surface.

[Effect of the idea]

As explained above, according to the fumigation agent dispersion device of the present invention, by imparting an electric charge to the fumigation agent (pesticides) particles and dispersing them, the spraying target (which has an electrode opposite to the electric charge) It becomes possible to significantly increase the amount of adhesion on agricultural crops), and the pesticidal effect becomes extremely high. In addition, it can be applied almost evenly to areas where it is difficult to adhere using conventional smoke spraying devices, such as the backs of leaves and stems of agricultural crops, and the pest control effect can be further enhanced. Furthermore, since the chemical can be concentratedly attached to agricultural crops, loss of the chemical can be reduced and environmental pollution due to drifting and scattering can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the entire spraying device showing the first embodiment of the present invention, Fig. 2 is a partially cutaway side view of the main parts thereof, and Fig. 3 is the second embodiment of the invention. Fig. 4 a to d are perspective views showing modified examples of the metal tube, and Fig. 5 shows smoke agents on the front and back of leaves using the device of the present invention and the conventional device. It is a graph showing the adhesion status. 1... Metal wire, 2... Electrical insulator, 3, 3a
~3d... Metal cylinder, 4, 5... Outer cylinder, 6... Blower pipe, 7... Suction pipe, 8, 9... Smoke part, 10
...DC high voltage power supply, 11, 12...Grounding section, 13
...Blower, 14...Discharge pipe, 15...Joint pipe, 1
6... Gap portion, 17... Tongue-like projection, 18... Air inlet, 19... Outlet.

Claims (1)

[Claims for Utility Model Registration] (1) A metal wire is disposed inside a rotationally symmetrical metal cylinder along its length via an electrical insulator, and this metal wire is connected to the anode of a high-voltage power supply. Alternatively, while connecting the cathode, a blower is placed on one end side of the metal tube, and a smoke generating part of a fuming agent is provided between the metal tube and the blower, and the smoke is sucked together with air to blow the inside of the metal tube. A chemical dispersion device for a fuming agent, characterized in that the other end of the metal cylinder is used as a discharge port. (2) The cylindrical surface of the front metal cylinder is a continuous smooth surface, a grid-like surface,
A chemical dispersion device for fuming agents according to claim 1, characterized in that it comprises a net-like surface, a porous surface, etc.