JP4762535B2 - Nozzle for liquid spray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle for spraying a liquid which exerts excellent adhering effects on spraying while allowing an attempt of reducing drifts. <P>SOLUTION: The nozzle for spraying a liquid has a spraying plate equipped with a spraying hole for a liquid, e.g. a chemical, at the outlet of a liquid passage of the cylindrical nozzle body. A liquid flow adjusting member having a flow adjusting passage for guiding a liquid to the spraying hole with an opening at one end of the passage opposing the spraying hole is arranged in the liquid passage, and the liquid adjusting member is removable from the nozzle body. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a nozzle for spraying a liquid used in, for example, a spreading apparatus for spraying fertilizers, chemicals, or the like on agricultural products.

  In general, this type of spray nozzle includes, as schematically shown in FIG. 6, a joint member B fitted to the tip of a liquid supply hose A connected to a discharge port of a liquid pump, and the joint member A cylindrical nozzle body D connected to the tip of B via a nut C, and a spray plate E assembled in the tip opening of the nozzle body D. F is established, and the chemical liquid sent from the liquid tank via the liquid pressure pump is sprayed from the spray hole F in the form of a mist.

  By the way, in the spray nozzle having the above-described configuration, the chemical liquid pumped to the nozzle body D via the liquid pumping pump tends to be turbulent in the liquid passage G of the nozzle body D, and is disturbed by the chemical liquid in the liquid passage G. When the flow is generated, the chemical solution repeatedly collides in the liquid passage G, and accordingly, the average particle size of the chemical solution sprayed from the spray hole F of the spray plate E becomes 100 μm or less, and the drift (scattering) occurs when spraying agricultural chemicals. ) Is likely to occur.

  However, in recent years, for example, in order to suppress the mixing of agricultural chemicals into water systems and to ensure food safety, it is necessary to prevent chemical drift (spattering) when spraying agricultural chemicals. It is important not to generate small particles having an average particle size of 100 μm or less.

On the other hand, in order to suppress the occurrence of drift, for example, there is a method in which air is mixed into the chemical solution and injected from the spray hole. However, with the above method, the average particle diameter is 500 μm to 1000 μm, and the occurrence of drift is suppressed. However, if the spray particles are 500 μm to 1000 μm as described above, the effect of attaching the drug to the crop is lowered depending on the crop or the drug, so that there is a problem that the obtained drug effect remains uneasy.
JP-A-2-205217

  The present invention was developed in view of the above circumstances, and an object thereof is to provide a nozzle for liquid spraying that can reduce drift during spraying and that has an excellent adhesion effect. is there.

In order to achieve the above object, the invention according to claim 1 is a spray nozzle in which an injection plate having a liquid spray hole is provided at an outlet of a liquid passage in a cylindrical nozzle body. with spherically swollen portion that bulges to the spray direction of the liquid is provided at the central portion, the spray hole is opened in a substantially elliptical shape in the spherically swollen portion, one end opening into said liquid passage the mists A liquid rectifying body provided with a liquid rectifying passage for guiding the liquid toward the spray hole facing the hole is provided, and the liquid rectifying passage of the liquid rectifying body and the spray hole of the injection plate are the same The center of each hole is on the axis and the diameter of the liquid rectifying passage is formed larger than the short diameter of the spray hole , and the liquid rectifying body is removable from the nozzle body. It is characterized by being.

According to the first aspect of the present invention, the chemical liquid sent from the liquid tank through the liquid pressure pump flows into the liquid passage of the nozzle body and passes through the liquid rectification passage of the liquid rectifier. Along with this, the flow of the chemical liquid is adjusted to a straight flow in the liquid rectifying passage, so that the flow of the chemical liquid becomes a stable linear flow and is guided to the spray hole of the spray plate, and the chemical liquid is a nozzle like a conventional nozzle. Turbulent flow in the liquid passage of the main body and the collision of the chemical solution repeatedly in the liquid passage are reliably suppressed, and accordingly, the occurrence of drift (scattering) can be suppressed when spraying agricultural chemicals. Further, by changing the liquid flow controller for loading the nozzle the body, it is possible to arbitrarily change the average particle size of the spray particles of the chemical liquid ejected from the spray hole of噴板.

FIG. 1 is a vertical cross-sectional view of a liquid spray nozzle used when applying fertilizer or insecticide in a vegetable garden. This liquid spray nozzle 1 is basically composed of:
A substantially cylindrical nozzle body 2 assembled via a joint member 10 to the tip of a liquid supply hose (not shown) connected to a discharge port of a liquid pump (not shown);
A filter 3 interposed in the middle of the liquid passage 21 in the nozzle body 2;
It is comprised from the injection plate 4 assembled | attached to the front-end | tip opening part of this nozzle main body 2. As shown in FIG.

  The liquid supply hose is connected to a discharge port of a liquid pump (not shown).

  The nozzle body 2 is provided with a liquid passage 21 penetrating in the axial direction, and a ring-shaped inward flange 22 is integrally formed on the inner peripheral surface of the liquid passage 21 in the middle of the liquid passage 21 in the length direction. The filter 3 and the ring-shaped packing 31 are sequentially inserted into the liquid passage 21 from the outlet side of the liquid passage 21 so that the outer peripheral portion of the filter 3 is sandwiched between the packing 31 and the inward flange 22. I have to.

  The filter 3 is formed in a hat shape in which a central portion bulges out into a substantially hemispherical shape from a wire mesh having a mesh size of about 80 mesh, for example. The packing 31 is formed in an annular shape from a soft elastic material such as rubber or soft synthetic resin.

Further, a female screw 23 for screwing the joint member 10 is provided around the inlet side inner periphery of the liquid passage 21 in the nozzle body 2, and a male screw 24 is provided on the outlet side outer periphery of the liquid passage 21 in the nozzle body 2. There is peripherally provided, to the male screw 24, so that screwing the nut 25.

  The jet plate 4 is made of a disc-shaped stainless steel plate, and a spherical bulging portion 41 and a positioning bulging portion 42 extending in the radial direction from the spherical bulging portion 41 are formed by press molding at the center portion thereof. The spray hole 40 is formed in the spherical bulge portion 41.

  The jet plate 4 is assembled in an opening on one end side of a cylindrically shaped synthetic resin holder 5, and a liquid rectifying body 6, which will be described later, is loaded in the holder 5 and then the outlet side of the liquid passage 21. Then, the nut 5 is screwed to the male screw 24 after being inserted into the liquid passage 21, so that the holder 5 is assembled into the liquid passage 21 of the nozzle body 2 by the engagement flange portion 26 provided on the nut 25. is doing.

  The liquid rectifier 6 is formed in a substantially disk shape from a synthetic resin material, and a liquid rectifying passage for guiding a chemical liquid toward the spray hole 40 at one end opening facing the spray hole 40 at the center thereof. 61 is provided at the center thereof, and the liquid rectifying passage 61 is loaded into the holder 5 so that one end opening of the liquid rectifying passage 61 faces the spray hole 40 of the injection plate 4.

  In the liquid spray nozzle 1 of the embodiment, the diameter φ of the liquid rectifying passage 61 is 2.5 mm, the length L is 4 mm, and the distance S from the one end opening of the liquid rectifying passage 61 to the spray hole 40 is 3.2 mm.

  The liquid rectifying passage 61 and the spray hole 40 of the spray body 4 are both on the central axis of the nozzle body 2 and are arranged so that the centers of the holes coincide with each other.

  The liquid rectifier 6 may be formed of a metal material such as stainless steel.

  Next, the operation of the spray nozzle having the above configuration will be described.

The chemical liquid sent from the liquid tank through the liquid pressure pump flows into the liquid passage 21 of the nozzle body 2 via the joint member 10 and is mixed into the chemical liquid when passing through the filter 3 in the liquid passage 21. After the foreign matter such as dust is removed, it flows into the liquid rectifying passage 61 of the liquid rectifying body 6.
Then, the flow of the chemical liquid is adjusted to a straight flow in the liquid rectifying passage 61, and the flow of the chemical liquid becomes a stable linear flow, which is guided to the spray hole 40 of the spray plate 4, and from the spray hole 40 to the outside. In other words, like a conventional nozzle, the chemical liquid turbulently flows in the liquid passage of the nozzle body and reliably prevents the chemical liquid from repeatedly colliding in the liquid passage. It is done.

Accordingly, the average particle diameter of the chemical liquid is sprayed from the spray hole 4 0噴板4 without a 100μm or less, when spraying pesticides, is the occurrence of drift (scattering) is suppressed.

  By the way, the present inventor prepares the liquid spray nozzle 1 having the above-described structure in which the liquid rectifying body 6 is loaded in the nozzle body 2 and the one in which the liquid rectifier 6 is not loaded. An experiment was conducted in which the liquid (water) pressurized to 5 MPa (gauge pressure) was supplied to examine the state of the spray flow and the like. The results are shown in Table 1.

In Table 1, the black triangles indicate the results when the liquid rectifier 6 is loaded in the nozzle body 2, and the white triangles indicate the case where the liquid rectifier 6 is not loaded in the nozzle body 2. Shows the results.

この表１からも明らかなように、ノズル本体２内に液体整流体６を装填しないものでは、噴霧粒子の平均粒子径が２００μｍ以下であったのに対して、ノズル本体２内に液体整流体６を装填したものでは、噴霧粒子の平均粒子径が２００〜３００μｍの範囲内となり、しかも噴霧流の勢いも充分に強かった。
噴霧される薬液の噴霧粒子の平均粒子径が大きくなり、所望の平均粒子径に近づけることが出来ることが判明した。

As apparent from Table 1, in the case where the liquid rectifier 6 is not loaded in the nozzle body 2, the average particle diameter of the spray particles is 200 μm or less, whereas the liquid rectifier is contained in the nozzle body 2. In the sample loaded with 6, the average particle diameter of the spray particles was in the range of 200 to 300 μm, and the momentum of the spray flow was sufficiently strong.
It has been found that the average particle diameter of the spray particles of the chemical liquid to be sprayed becomes large and can be close to the desired average particle diameter.

  Table 2 shows the measurement by changing the pressure of the pressurized liquid supplied to the spray nozzle 1. The circle mark is 1.0 MPa (gauge pressure) and the triangle mark is 1.5 MPa (gauge pressure). The square mark is 2.0 MPa (gauge pressure), the black paint is the one in which the liquid rectifier 6 is loaded in the nozzle body 2, and the white one in which the liquid rectifier 6 is not loaded in the nozzle body 2. Show.

この表２からも明らかなように、圧力が高くなるに従って薬液の噴霧粒子の平均粒子径が小さくなることがわかる。

As is clear from Table 2, it can be seen that the average particle size of the spray particles of the chemical solution decreases as the pressure increases.

  By the way, the liquid rectifying body 6 loaded in the nozzle body 2 can remove the nut 25 from the nozzle body 2 and take out the liquid rectifying body 6 from the liquid passage 21 together with the holder 5 to which the injection plate 4 is assembled. As shown in FIG. 5, a rectifying body 6 having a short liquid rectifying passage 61 is separately prepared, and a desired liquid rectifying body 6 is loaded in the nozzle body 2 according to the application, and spray particles of a chemical solution Can be changed arbitrarily.

  Thus, in the above spray nozzle, the liquid rectifying body 6 having the liquid rectifying passage 61 is arranged on the inner surface side of the injection plate 4 in the nozzle body 2, so that the pressurized chemical solution can be obtained. Since the flow straightens and is guided to the spray hole 40 by the liquid rectifying passage 61, the flow of the chemical liquid becomes a stable linear flow, and as a result, the spray of the chemical liquid ejected from the spray hole 40 of the spray plate 4 is achieved. When the average particle size of the particles is suppressed to 100 μm or less, drift (scattering) can be prevented when spraying agricultural chemicals, and by changing the liquid rectifier 6 loaded in the nozzle body 2, It becomes possible to arbitrarily change the average particle diameter of the spray particles of the chemical liquid ejected from the spray holes 40 of the ejection plate 4.

The longitudinal cross-sectional view of the nozzle for spraying concerning one Embodiment of this invention. FIG. Sectional drawing of a jet plate. The perspective view of a liquid rectifier. The longitudinal cross-sectional view of the nozzle for spraying loaded with the liquid rectifier different from the liquid-made fluid shown in FIG. The longitudinal cross-sectional view of the conventional nozzle for spraying.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nozzle for liquid spray 2 Nozzle main body 21 Liquid passage 25 Nut 3 Filter 4 Spray plate 40 Spray hole 5 Holder 6 Liquid rectifier 61 Liquid rectifier passage

Claims (1)

In the spray nozzle provided at the outlet of the liquid passage in the cylindrical nozzle body, the spray plate provided with the spray hole of the liquid,
A spherical bulge that bulges in the liquid spray direction is provided in the central portion of the spray plate, and the spray hole is formed in a substantially elliptic shape in the spherical bulge, and has one end in the liquid passage. with a liquid flow controller which opening is provided with a liquid rectifying passage for guiding toward the spray hole to face the injection of liquid Kiriana it is provided, the liquid flow regulator rectification passage and said噴板liquid The spray holes are on the same axis and the centers of the holes coincide with each other, the diameter of the liquid rectifying passage is formed larger than the short diameter of the spray holes , and the liquid rectifying body is formed in the nozzle body. A nozzle for spraying liquid, which is removable from the nozzle.

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