JPS6369554A - Nozzle - Google Patents

Abstract

PURPOSE:To form various atomizing patterns, by forming vortex chambers mutually different in volume to both-side edges of a core and allowing the area of aperture parts of both ends of the through-hole of an orifice to mutually differ and also changing the opposite faces of the core and the orifice. CONSTITUTION:A core 18 and an orifice 28 are inserted between a nozzle main body 10 and a capo 32 to be fitted to the nozzle main body 10. Plural through- holes 24 are bored to this core 18 and vortex chambers 20, 22 which are communicated with these through-holes 24 and are different in volume are formed to both-side edges. Further a through-hole 30 formed with aperture parts different in area is provided to both-side edges of the orifice 28. Various atomizing patterns can be obtained by changing the opposite faces of the core and the orifice, and variously changing the volume of the vortex chambers in which vortexes are caused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nozzle used in a boom sprayer, a speed sprayer, etc. used when spraying chemicals on agricultural crops.

[Prior Art] In nozzles used in boom sprayers and speed sprayers for spraying chemicals on agricultural crops, a core and an orifice are fitted between a nozzle body and a cap fitted onto the nozzle body. In addition, the spray pattern of the chemical sprayed from the nozzle affects the type of crop, growth conditions, type of chemical, and the presence or absence of wind (drift of the sprayed chemical).

) etc. is desirable.

In conventional nozzles, the core has a vortex chamber formed only on the side facing the orifice, and the surface facing the core and the orifice has not been changed.

[Problems to be Solved by the Invention] Therefore, in conventional nozzles, when changing the spray pattern, it is necessary to change the core or orifice to another one, and various media are used to change the spray pattern. This requires the provision of a child or orifice, which is disadvantageous in terms of cost and management.

In particular, when changing cores and orifices, there is a possibility of losing them because a large number of cores and orifices are prepared, and there are also inconveniences such as clogging due to soiling with soil etc. during storage.

Additionally, with a nozzle that has a variable vortex chamber volume, it is not possible to determine the actual discharge amount. Therefore, if a scale type is used that allows the discharge amount to be determined, it is necessary to significantly improve the precision of each part of the nozzle. Therefore, variable nozzles have the disadvantage of significantly increasing costs.

An object of the present invention is to provide a nozzle that allows the spray pattern to be changed without the need for different cores or orifices, and that does not increase costs.

[Means for Solving the Problems] According to the nozzle of the present invention, the core and the orifice are fitted between the nozzle body and the cap fitted to the nozzle body, and the core has a plurality of through holes. A hole is drilled, and vortex chambers with different volumes are formed on both sides of the orifice to communicate with the through-hole. On the other hand, through-holes with openings of different areas are formed on both sides of the orifice, and the combination of the core and the orifice It enables the formation of different eruption patterns.

- [There are four combinations of the vortex chamber of the core and the opening of the through hole on the facing surface of the working core and the orifice, and the volume of the vortex chamber changes according to this combination. As the volume of the vortex chamber increases, the vortex flow inside the vortex chamber becomes stronger, the spray angle becomes larger, the diameter of one particle becomes smaller, the discharge amount decreases, and the spray force becomes weaker.
The spray will be soft. Also, as the volume of the vortex chamber increases, the flow coefficient of the orifice passage increases. In this way, when the operator changes the facing surface between the core and the orifice, the volume of the vortex chamber in which the vortex flow of the drug is generated is changed, and the spray pattern is changed.

[Example] Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view of the nozzle according to the embodiment, and the nozzle body 10 has a passage 12 through which medicine is fed under pressure from a liquid pump (not shown), and a connection opening 1 formed on the lower end surface side.
4, and a threaded groove 16 formed on the outer peripheral edge of the lower end. The core 18 fits into the inner hole of the lower end surface of the nozzle body 10, and has first vortex chambers 20 having different volumes on both end surfaces.
and a second vortex chamber 22 are formed. First vortex chamber 20
and the second vortex chamber 22 communicate with each other via a plurality of through holes 24, and in FIG.
The connection opening 14 of The packing 26 fits into the outer circumferential portion of the core 18 protruding from the lower end of the nozzle body 10.

The orifice 28 is formed with a through hole 30 that penetrates in the axial direction, and is placed against the lower end surfaces of the core 18 and the packing 26 . The cap 32 has a circular window 34 formed in its center;
It is screwed into the thread groove 16 of the nozzle body 10, and holds the core 18, the packing 26, and the orifice 28 between it and the lower end surface of the nozzle body 10.

2 and 3 are a view of the core 18 of FIG. 1 as viewed from the first vortex chamber 20 side, and a cross-sectional view taken along the line ■-■ of FIG. 2, respectively. The circumferential axes of the first vortex chamber 20 and the second vortex chamber 22 are formed in the shape of a vortex line, and the drug flowing into the first vortex chamber 20 or the second vortex chamber 22 through the through hole 24 is vortexed. A linear circumferential contour generates a vortex flow in the first vortex chamber 20 or the second vortex chamber 22 .

FIG. 4 is a detailed cross-sectional view of the orifice 28 of FIG. The through hole 30 passes through the orifice 28 along the central axis of the orifice 28 and has a first opening 36 and a second opening 38 having different areas and volumes at both ends.

The operation of the nozzle shown in FIG. 1 will be explained. It is desirable to adjust the spray pattern of the chemical sprayed from the nozzle depending on the type of crop, growth conditions, type of chemical, the presence or absence of wind (which affects the drift of the sprayed chemical), etc. For example, a soft and fine spray is suitable for crops with easily damaged leaves such as lettuce, while a spray with strong force that penetrates deep into the leaves is suitable for crops with thick leaves such as wheat and potatoes, and a spray with a weak wind is suitable. In some cases, a weak spray is appropriate to avoid the spray hitting the ground too forcefully and causing the chemical to drift (this is the case with a boom sprayer). In some cases, a fine spray is suitable, and in the case of standing trees, etc., a spray with strong force and a long distance is suitable. change. Core 18 and orifice 2
The first vortex chamber 20. Second vortex chamber 22
There are four combinations of the first opening 36 and the second opening 38, and the volume of the vortex chamber changes according to this combination.

As the volume of the full chamber decreases, the vortex in the vortex chamber becomes stronger, the spray angle becomes larger, the particle diameter becomes smaller, the discharge amount decreases, the spray force becomes weaker, and the spray becomes softer. Generally, the larger the volume of the vortex chamber, the more the orifice 28
The flow coefficient of the through hole 30 increases. In this way, four different spray patterns can be obtained from the same core 18 and orifice 28.

FIG. 5 shows another orifice. In the orifice 28b in FIG. 5, the chamfer angles at both ends of the through hole 30 are different from those in the orifice 28. By changing the chamfer angles at both ends of the through hole 30 in this way, the area and volume of the first opening 36 and the second opening 38 can be changed.

FIG. 6 shows the combination of orifice 28 and another core. The core 18b has only the first vortex chamber 20, does not have the second vortex chamber 22, and has a flat end face on the side of the second vortex chamber 20. Therefore, in a nozzle in which the flat end surface of the core 18b faces the orifice 28,
The ejection of drug is discontinued. This method can be used for nozzles installed at appropriate intervals such as on a boom where spraying is not necessary.

7 to 9 show other embodiments of the core,
FIG. 7 is a plan view of the core, and FIGS. 8 and 9 are cross-sectional views taken along lines 1--2 and 1--2 in FIG. 7, respectively. The first whirlpool chamber 20c and the second whirlpool chamber 22c of the core 18c have different volumes and have a circular peripheral edge profile. The through holes 24 in FIGS. 1 to 3 are parallel to the axial direction of the core 18, whereas the 'R through holes 24c are bored obliquely to the axial direction of the core 18c. The first vortex chamber 20C and the second vortex chamber 22c are communicated with each other. The drug enters the first vortex chamber 20 through the through hole 24c.
c or the second vortex chamber 22c from a tangential direction, and due to this inflow angle, the first vortex chamber 20c or the second vortex chamber 22
A vortex is generated at c.

[Effects of the Invention] As described above, according to the present invention, swirl chambers having different volumes are formed on both sides of the core, and the areas of the openings at both ends of the orifice are made to be different from each other. and change the surface facing the orifice. In this way, the volume of the full chamber in which the vortex is generated can be varied, and various spray patterns can be obtained. Therefore, there is no need to prepare and manage a large number of cores or orifices to change the spray pattern, which is convenient and can suppress an increase in cost. Generally, the core and orifice are made of ceramic molded products, and in that case, forming swirl chambers and openings with different volumes and areas on both sides of the core and orifice hardly causes an increase in cost.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the nozzle according to the embodiment, Figures 2 and 3.
The figures are respectively a view of the core in Figure 1 as seen from the first vortex chamber side and a sectional view taken along the line ■-■ in Figure 2. Figure 4 is a detailed cross-sectional view of the orifice in Figure 1; 5 shows another orifice, FIG. 6 shows a combination of the orifice and another core, FIGS. 7 to 9 show other embodiments of the core, and FIG. 8 is a plan view of the core, and FIGS. 8 and 9 are cross-sectional views taken along the line ■-■ and the line IX-IX in FIG. 7, respectively. 10... Nozzle body, 18, 18b, 18c... Core, 20, 22c... First swirl chamber, 22° 22c...
・Second vortex chamber, 24, 24c... through hole, 28, 28
b... Orifice, 30... Through hole, 32... Cap, 36... First opening, 38... Second opening. Procedural official document (spontaneous) November 25, 1985 Commissioner of the Patent Office Black 1) Mr. Yu Akira ■, Indication of the case 1986 Patent Application No. 210629 2, Title of invention Nozzle 3, Person making amendment case Relationship with Patent Applicant Name Maruyama Seisakusho Co., Ltd. 4. Column for detailed explanation of the invention in the agent's specification (6, Contents of the amendment) In the specification, change "largely" in line 6 of page 4 to the following: Corrected as "small"

Claims (2)

[Claims] (1) A core and orifice that are inserted between the nozzle body and a cap that fits on the nozzle body, with multiple through holes drilled in the core and communicating with the through holes on both side edges. While forming vortex chambers with different volumes, a through hole having openings with different areas is provided on both sides of the orifice, so that different spray patterns can be formed by the combination of the core and the orifice. nozzle. (2) The nozzle according to claim 1, wherein the through hole is oblique to the axial direction of the core.