JPH01194955A - Nozzle for spraying liquid - Google Patents

Abstract

PURPOSE:To uniformly spray liquid regardless of distance, by forming a spray nozzle and a channel for mixing air in the neighborhood of a spray pore on the side of the liquid feed channel in the direction of the liquid flow in succession from the upstream thereof, and providing a through hole for introducing air in the part of the channel for mixing air close to the spray nozzle. CONSTITUTION:Pressurized liquid is passed through a liquid feed channel 4 to be sprayed from a spray pore 8 provided at a forward end of the channel 4. In the neighborhood of the spray pore 8, a spray nozzle 13 and a channel for mixing air 9 are provided, on the side of the liquid feed channel 4, in the direction of the liquid flow in series from the upstream thereof. Further, through holes 14 for introducing air are formed in the channel for mixing air 9 near the spray nozzle 13. Since the particle diameters of mist sprayed from the spray nozzle 1 can be approximately equal between the mist sprayed to a distant place from the nozzle and the mist sprayed near the nozzle, a uniform spraying can be achieved by one operation even when liquid is sprayed over a wide area.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a liquid spray nozzle used, for example, when spraying a chemical solution such as fertilizer onto agricultural crops.

(Prior art) Conventionally, this type of liquid spray nozzle has a spray nozzle consisting of a small-diameter through hole formed at the tip of a liquid supply path, and liquids such as chemical solutions that are pressure-fed through the liquid supply path are passed through the spray nozzle. It is configured to spray from

(Problems to be Solved by the Invention) In the liquid spray nozzle of the conventional structure described above, in order to spray far, the hole diameter of the spray nozzle is made small and the pressure of the supplied chemical solution is increased. The mist at the center of the jet is coarse, and the surrounding mist is finer, making it impossible to uniformly spray the chemical solution, which is a fatal drawback.

Therefore, in such a case, the spraying operation must be repeated in order to uniformly spray the chemical solution, resulting in a problem of extremely poor work efficiency.

Another problem is that fine mist can be blown by the wind and fall on workers and other plants, or be inhaled by workers.

The present invention was proposed in view of the above problems, and an object of the present invention is to enable homogeneous liquid spraying even at a distance.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a liquid spray that sprays pressurized liquid through a liquid supply path from a spray hole provided at the tip of the liquid supply path. In the nozzle for use, an injection nozzle and an air mixture passage are formed in the liquid supply path side portion near the spray hole in order from the top in the liquid distribution direction,
An air introduction hole is formed in a portion of the air mixture passage near the injection nozzle.

(Function) The liquid forced from the liquid supply path to the injection nozzle is injected from there toward the air mixture passage.

The liquid injected from the injection nozzle spreads into the hot air passageway, and negative pressure is generated in the space on the injection nozzle side of the hot air passageway, so this negative pressure causes outside air to be sucked into the air mixture passageway. It is evenly mixed with the fluid in the air mixture passage.

When the fluid with air mixed uniformly is injected from the spray nozzle, the particle size of the chemical mist in the part that reaches a long distance due to the injection pressure and the part that is scraped by the outside air and floats around it are different. The particle size is almost the same as that of the other particles, and it is possible to disperse the particles almost evenly.

(Example) Embodiments of the present invention will be described below based on the drawings.

Figure 1 is an exploded perspective view of a liquid spray nozzle used for fertilizing vegetable gardens and spraying pesticides, and Figure 2 is a longitudinal side view of the assembled state. 2 shows a joint member 3 fitted to the tip of a chemical solution supply hose 2 connected to a discharge port of a chemical solution pressure pump (not shown), and a portion near the tip of a liquid supply path 4 formed inside the joint member 3. air mixture member 6 screwed with nut 5 to
and a spray hole 8 fixed to the tip of the air mixture member 6 with a fixing nut 7.

The air mixture member 6 has a small diameter air mixture passage 9 formed therein,
A rectifying plate 11 with small flow rectifying holes 10 bored in two places on the left and right in the figure is sandwiched between the joint member 3 and the joint member 3, and the nozzle 12 part is mixed between the rectifying plate 11 and the air mixture passage 9. An injection nozzle plate 13 protruding into a spherical shape is fixed to the side of the air passage 6, and an air introduction hole 14 for introducing outside air is provided in the air mixture member 6 at a portion close to the injection nozzle plate 13. It is configured.

Further, the spray holes 8 are formed by forming a vertically elongated central part of a disc-shaped thin plate and opening a slit running horizontally in the central part of the projecting part.

Incidentally, the opening area S of the slit forming the spray hole 8 is larger than the opening area S2 of the injection port 12 formed in the injection nozzle 13.

The operation of the liquid spray nozzle 1 configured as described above is explained in the third example.
This will be explained next based on the figure.

First, the chemical liquid fed to the liquid supply path 4 of the joint member 3 in a pressurized state by a chemical liquid pressure feeding pump (not shown) passes through the small rectifying holes 10 of the rectifying plate 11, and then flows through the injection nozzle 1.
It is rectified towards 3.

Next, the chemical liquid guided to the spherical part of the injection nozzle 13 is vigorously injected from the injection port 12 toward the air mixture passage 6.

The injected chemical solution flows into the air mixture passage 6 as shown by mesh cotton A in the figure.
When it spreads to the inner cup, a negative pressure is generated in the upstream part from this part due to the jet flow of the chemical solution, and the outside air is sucked into the air mixture passage 6 from the air introduction hole 14 by this negative pressure.

In this way, the air sucked into the air mixture passage 9 is finely crushed and mixed with the chemical solution, and then injected from the spray hole 8. When sprayed from 8, the particle size of the mist in the part that reaches far and the particle size of the mist in the part that is sprayed nearby are almost the same, and it is possible to spray the chemical solution almost evenly. .

Incidentally, FIGS. 4 and 5 respectively show the current plate 1 of the above embodiment.
1 and the injection nozzle 13, the one in FIG.
2, and the injection nozzle 13 is formed in a flat plate shape.

In the case shown in FIG. 5, the injection nozzle 13 is formed into a tapered tapered shape, and the tapered surface portion has the function of the rectifying plate 11, so that the rectifying plate 11 is omitted.

(Effects of the Invention) As explained above, according to the present invention, the liquid sprayed from the spray nozzle has a mist particle size in a far away portion and a mist particle size in a nearby sprayed portion. Since they can be made to have approximately the same diameter, even when spraying liquid over a large area, uniform spraying can be performed in one operation.

Thereby, it is possible to reduce the effort and time of the spraying work and to significantly improve work efficiency.

In addition, since the particle size of the mist to be sprayed is the same, it is easy to set the desired optimum particle size of the mist, preventing the generation of too fine a mist that would fly around in the wind. There is also the advantage that it is possible to eliminate as much as possible the risk of falling on the worker or other plants, or of being inhaled by the worker.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention. Figure 1 is an exploded perspective view of a liquid spray nozzle used for fertilizing vegetable gardens and spraying pesticides, and Figure 2 shows an assembled liquid spray nozzle. FIGS. 4 and 5 are schematic vertical side views of main parts showing modified examples of the current plate and the injection nozzle, respectively. ■...Liquid spray nozzle, 4...Liquid supply path, 8...
- Spray hole, 13 injection nozzle, 14... air introduction hole. Patent applicant: Ken Yamamoto, Attorney Tamayo, Patent attorney: Katsunori Sugimoto and one other person Figure 4 Figure 5

Claims (1)

[Claims] In a liquid spray nozzle that sprays pressurized liquid through a liquid supply path from a spray hole provided at the tip of the liquid supply path, a spray nozzle and an air mixture passage are provided on the side of the liquid supply path near the spray hole. A nozzle for spraying liquid, characterized in that a through hole for introducing air is formed in a portion of the air mixture passage near the injection nozzle.