JPS627399Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a nozzle that can freely adjust the diffusion angle of a medium-low pressure sprayer that sprays liquid agents such as herbicides.

Conventionally, as this type of nozzle, as illustrated in FIG. 1, there is one in which a concave reflective surface is fixedly provided corresponding to the injection hole of the injection nozzle. Although this conventional nozzle can uniformly spread the chemical solution at a fixed angle, it has the inconvenience of not being able to adjust the diffusion angle. Further, as a nozzle whose diffusion angle can be adjusted, there is a ``diffusion angle adjustment nozzle'' disclosed in Japanese Utility Model Publication No. 43-30257. This idea attempts to change the diffusion angle by raising and lowering a diffusion surface that is inclined at a constant angle with respect to the injection hole, and changing the contact point of the water on the diffusion surface. However, in this type of nozzle, by simply moving the flat diffusion surface with a constant inclination angle up and down and changing the contact point of the ejected water, the applicant's experiments have shown that no significant change in the diffusion angle of the ejected water was observed. Ta.

In particular, when spraying herbicides for weed control, it is absolutely necessary to avoid scattering the chemical onto other crops, so the nozzle should be one that can easily and reliably adjust the diffusion angle to suit the row spacing. This is desirable.

This invention aims to eliminate the drawbacks of these conventional products and provide a diffusion angle adjustment nozzle that is highly practical as a herbicide nozzle.

That is, in the present invention, a rectangular flat plate with an arcuate edge is curved at a substantially right angle at its tip, and is supported by the injection nozzle so that the tip protrudes forward facing the injection hole of the injection nozzle. The gist of this invention is a structure of a diffusion angle adjusting nozzle characterized in that its support angle can be freely adjusted back and forth.

This invention will be explained with reference to an illustrated embodiment. Reference numeral 1 denotes a spray nozzle, which is formed to be detachably attached to the tip of a spray rod of a conventional sprayer, and has a spray hole 2 bored in its upper surface. 3 is a nozzle plate provided facing the nozzle hole 2 . FIG. 1 shows an example of a conventional nozzle commercially available, and a nozzle plate 3 provided to correspond to the nozzle 2 is formed integrally with the nozzle 1. With this conventional product, uniform spraying at a fixed angle can be easily performed, but since the nozzle plate 3 is fixed, it is not possible to adjust the diffusion angle of the sprayed water.

FIG. 2 and subsequent figures relate to embodiments of the present invention, and the nozzle plate 3 is preferably a highly elastic steel plate in the form of a flat or slightly concave strip. This nozzle plate 3 is formed by bending a rectangular flat plate having an arcuate tip edge at a substantially right angle, and forming a tip end as a water sprinkling part a and a base part as a water guiding part b. A pedestal 4 is integrally connected to the lower end of the water guide portion b. Pedestal 4
In this method, the water guide part b is arranged in series with the nozzle 1, and the spout plate 3 is fixed to the upper surface of the nozzle 1 by screwing or other means so that the water spray part a protrudes forward facing the jet hole 2 of the jet nozzle 1. . 5 is a support base formed integrally with the nozzle 1, and has a screw hole 6 at the top.
is drilled. This screw hole 6 has an adjustment screw 7.
The screw shaft 8 can be screwed together freely, and by rotating the adjusting screw 7, the tip of the screw shaft 8 moves back and forth toward the back surface of the nozzle plate 3. That is, when the adjustment screw 7 is rotated in a certain direction, the tip of the screw shaft 8 moves forward and presses the back surface of the nozzle plate 3, causing it to tilt forward.When the adjustment screw 7 is rotated in the opposite direction, the tip of the screw shaft 8 moves back and the nozzle The plate 3 returns to its original state due to its own elasticity.

When this device is attached to a medium-low pressure sprayer of 1.0 kg/cm ² or less and the adjusting screw 7 is rotated to release the pressure of the screw shaft 8 against the nozzle plate 3, the nozzle plate 3 stands upright as shown in Fig. 3. However, the water spraying part a at the tip thereof is supported facing the injection hole 2. When water c is injected from the injection hole 2 of the nozzle 1 to the water spray part a, the water c collides with the inner surface of the water spray part a of the nozzle plate 3 at a substantially right angle, and is spread widely and uniformly by its arcuate edge. As shown in Figure 4, it spreads out into a large fan shape of more than 120 degrees and scatters.

Next, by rotating the adjusting screw 7 and advancing the tip of the screw shaft 8, pressing the back side of the nozzle plate 3 and gradually tilting it forward, the position facing the nozzle hole 2 will gradually move to the water guide part b. As shown in Fig. 5, water guide part b
The sprayed water c that collides with the water spraying part a and reaches the water spraying part a gradually increases, and the diffusion angle decreases as the impact angle and pressure of the sprayed water c in the spraying part a change, and according to experiments, as shown in Fig. 6. narrowed to less than 30°.
Moreover, since the sprayed water c is always subjected to a diffusion action at the water spraying section a, the spraying density is always uniform.

In this way, according to the present invention, by arbitrarily rotating the adjustment screw in the medium and low pressure sprayer,
This has the practical benefit of being able to easily and reliably adjust the diffusion angle of the chemical solution and the like.

Furthermore, according to the present invention, the diffusion angle can be adjusted over a wide range, which has extremely practical benefits.

Furthermore, according to the present invention, since all of the water sprayed is dispersed at the water spraying section, it has the practical benefit of making the spraying density uniform.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a conventional nozzle;
The figure is a perspective view of the embodiment of the present invention, Figure 3 is a vertical side view of the same embodiment when the diffusion angle of sprayed water is maximized, Figure 4 is a plan view of the same, and Figure 5 is a forward tilted water spray plate. FIG. 6 is a plan view of an embodiment of the present invention in which the diffusion angle of water is narrowed. The explanation of the symbols in the figure is as follows. 1
is the injection nozzle, 2 is the injection hole, 3 is the injection port plate, 4 is the pedestal, 5 is the support base, 6 is the screw hole, 7 is the adjustment screw, 8
is a screw shaft.

Claims (1)

[Scope of utility model registration request] A rectangular flat plate with an arcuate edge is curved at a substantially right angle at its tip, and is supported by the injection nozzle so that the tip protrudes forward facing the injection hole of the injection nozzle, and its support angle is changed back and forth. A diffusion angle adjustment nozzle characterized by being freely adjustable.