JPH0420514Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a nozzle installed in, for example, a speed sprayer, a boom sprayer, a power sprayer, etc. used for spraying pesticides on fields, and in particular, This invention relates to a nozzle that can change the spray angle.

[Prior Art] In an agricultural chemical spraying machine such as a speed sprayer, it is preferable to change the spray angle of the chemical sprayed from the nozzle depending on the target object, such as trellis crops or standing trees.

In conventional nozzles, various cores with different sizes and numbers of swirl chambers and various jet plates with different through hole sizes are prepared, and the cores and jet plates are changed.
Changing the spray angle of the nozzle.

[Problems to be Solved by the Invention] Therefore, it is necessary to increase the number of types of cores and spray plates in accordance with the number of spray angle adjustments. In a speed sprayer or the like, when the number of nozzles is large and the number of types of cores and spray plates is large, the total number of cores and spray plates becomes enormous. Also,
The existence of a huge number of cores and a plurality of types of spout plates for each type is complicated in terms of manufacturing costs, management, and portability during work, and there is a high risk of loss.

The purpose of this invention is to provide a nozzle that can adjust the spray angle without the need to prepare multiple types of cores and spray plates.

[Means for Solving the Problems] In this invention, the core 32 has through holes 40 that penetrate in the axial direction, and holes 40 that are formed at equal angular intervals in the circumferential direction on one end surface of the core 32 and have different depths. A plurality of vortex chambers 42 and a through hole 40 for each vortex chamber 42 are provided.
The spout plate 36 is adjacent to the one end surface of the core 32 and has a nozzle hole 48, and the relative rotational position between the core 32 and the spout plate 36 is determined. In order to selectively communicate the injection hole 48 to any one of the vortex chambers 42, insertion grooves 46 and 50 are formed in the core 32 and the injection plate 36 at equal angular intervals in the circumferential direction, and It has a locking protrusion 54 that is inserted into the insertion grooves 46 and 50 of the core 32 and the spout plate 36, and is disposed between the core 32 and the spout plate 36 in the periphery of the core 32 and the spout plate 36. The present invention proposes a nozzle characterized by having a positioning means including a positioning gasket 34 provided therein.

[Operation] When adjusting the spray angle, the vortex chamber corresponding to the desired spray angle is selected, and the core and the spray plate are placed at a relative rotation position where the nozzle hole of the spray plate communicates with the vortex chamber. Next, the core and the spout plate are positioned by the positioning means. The pumped liquid is introduced into each vortex chamber through the through holes and grooves, and a vortex flow of liquid is generated in each vortex chamber at a speed corresponding to the depth of each vortex chamber.
Only the liquid in the selected vortex chamber communicating with the nozzle hole of the spout plate is jetted out from the nozzle through the nozzle hole,
A spray angle corresponding to the selected swirl chamber depth is obtained.

[Embodiments] This invention will be described below with reference to embodiments of the drawings.

FIG. 5 shows a speed sprayer 10 equipped with the nozzle as an example of the use of the nozzle according to this invention. , and a fan 14 that is mounted on the rear part and generates pressure air, and the nozzle part 16 is connected to the drug tank 1.
2 and the fan 14.

FIG. 6 is a perspective view of the nozzle part 16, in which three nozzle pipes 18 are arranged in an arc shape so as to form the side and top sides, and a plurality of nozzles 20 are attached to each nozzle pipe 18. There is.

FIG. 7 shows the spray angle of the nozzle 20.
The spreading angle of the medicine ejected from the nozzle 20 is A
This is defined as the spray angle.

FIG. 1 is a cross-sectional view of the nozzle 20. The nozzle body 22 consists of a horizontal part 24 and an upright part 26 that is connected perpendicularly to the end of the horizontal part 24. The horizontal part 24 is attached at its end to the connection port of the nozzle pipe 18 by a cap 28, 24 and the upright portion 26 are formed with a passage 29 that communicates with a passage within the nozzle pipe 18 . A core gasket 30, a core 32, a positioning gasket 34, and a spout plate 36 are mounted on the upper end of the upright section 26 in order from the bottom, and these are connected by a cap 38 screwed onto the outer circumference of the upper end of the upright section 26. It is fixed to the standing portion 26.

FIGS. 2a and 2b are a plan view and a perspective view of the core 32 as viewed from the side of the spout plate 36. FIG. The core 32 has a through hole 40 formed in its center that penetrates in the axial direction.
A plurality (three in this embodiment) of vortex chambers 42 are formed as cylindrical recesses on the end surface of the second jet plate 36 side at equal angular intervals (120° in this embodiment) in the circumferential direction. At the same time, in order to communicate each vortex chamber 42 with the through hole 40, a communication groove 44 is formed which extends in the pipe between each vortex chamber 42 and the through hole 40 in a spiral shape. Each vortex chamber 4
2 have different depths. Insertion groove 46
are formed in the shape of notches on the periphery of the core 32 at equal angular intervals.

FIGS. 3a and 3b are a plan view and a perspective view of the spout plate 36 viewed from the core 32 side. The nozzle hole 48 is connected to the spout plate 3
It is formed so as to be offset from the center of the spout plate 6 and pass between both end faces of the spout plate 36, and on the side opposite to the core 32, it widens into a conical side surface shape and opens. Insertion groove 50
are formed as bottomed holes at equal angular intervals on the periphery of the spout plate 36. The spray plate 36 is adjacent to the end face of the core 32 on which the swirl chamber 42 is formed, and the core 32 and the spray plate 36 improve the adhesion between them to prevent liquid leakage from the swirl chamber 42. To prevent this, the surface is lapped.

FIGS. 4a and 4b are a plan view and a perspective view of the positioning gasket 34 viewed from the side of the jet plate 36. FIG. The positioning gasket 34 includes an annular body 52 that extends circumferentially.
and locking protrusions 54 that are formed integrally with the annular body 52 and protrude inward from the annular body 52 at equal angular intervals on the inner peripheral side of the annular body 52. The locking protrusion 54 protrudes from the annular body 52 on the spout plate 36 side. The positioning gasket 34 is attached to the upright portion 26 of the nozzle body 22, as shown in FIG.
It is interposed between the core 32 and the spout plate 36 at the peripheral edge of the upper end, and the locking protrusion 54 is inserted into the insertion groove 50 of the spout plate 36 and the insertion groove 46 of the core 32 at the upper and lower halves, respectively. It is inserted and locked.

The operation of the embodiment will be explained. When adjusting the spray angle, loosen the cap 38 and remove it from the upright portion 26 of the nozzle body 22.
A swirl chamber 42 of depth corresponding to the desired spray angle is selected. Then, the rotational position of the injection plate 36 relative to the core 32 is changed so that the injection hole 48 of the injection plate 36 is located at the center of the selected swirl chamber 42, and at this rotational position, the insertion groove 50 of the injection plate 36 is aligned. The locking protrusion 54 of the positioning gasket 34 is inserted into the positioning gasket 34. Finally, the cap 38 is tightened again to the upright portion 26, and the core gasket 30, core 32, and positioning gasket are fixed. The medicine fed under pressure through the passage 29 passes through the through hole 40 of the core 32 and enters each communication groove 44.
is introduced into each vortex chamber 42 through the vortex chamber 42, and generates a vortex flow in each vortex chamber 42 at a speed corresponding to its depth. Since only one swirl chamber 42 communicates with the nozzle hole 48, only the medicine in that swirl chamber 42 is ejected to the outside of the nozzle 20 through the nozzle hole 48. In this way, a spray angle corresponding to the selected swirl chamber 42 is obtained.

[Effects of the invention] As described above, according to this invention, a plurality of vortex chambers having different depths are formed in the core, and the positioning means is used so that the nozzle hole of the jet plate communicates only with the only vortex chamber. The relative rotational position of the core and the spout plate is determined by this, and the liquid plate introduced into the vortex chamber which is in communication with the nozzle hole of the spout plate is spouted from the nozzle hole. Therefore, by changing the relative rotational position between the core and the spout plate using the positioning means, and changing the vortex chamber communicating with the nozzle hole,
It is possible to obtain a spray angle according to the number of swirl chambers,
It is no longer necessary to prepare a large number of different types of cores and spray plates to adjust the spray angle, and this can provide significant advantages in terms of manufacturing costs, management, and other aspects.

[Brief explanation of the drawing]

The drawings relate to an embodiment of this invention, and FIG. 1 is a cross-sectional view of the nozzle, FIGS. 2 a and b are a plan view and a perspective view of the core seen from the spout plate side, and FIGS. 3 a and b are the spout plate. 4a and 4b are plan and perspective views of the positioning gasket as seen from the spout plate side, and FIG. 6 is a perspective view of the nozzle section, and FIG. 7 is a view showing the spray angle of the nozzle. 32... Core, 34... Positioning gasket, 3
6... Spout plate, 40... Through hole, 42... Vortex chamber, 44
... Communication groove, 48 ... Nozzle hole, 50 ... Insertion groove, 5
4...Latching protrusion.

Claims (1)

[Scope of utility model registration request] The core 32 has a through hole 40 that penetrates in the axial direction, a plurality of vortex chambers 42 that are formed at equal angular intervals in the circumferential direction on one end surface of the core 32 and have different depths, and each vortex. It has a communication groove 44 that communicates the chamber 42 with the through hole 40, a spout plate 36 is adjacent to the one end surface of the core 32 and has a nozzle hole 48, and has a spout hole 48 that connects the core 32 and the jet The relative rotational position with respect to the plate 36 is determined, and the nozzle hole 48 is connected to the swirl chamber 4.
Insertion grooves 46 and 50 are formed in the core 32 and the spout plate 36 at equal angular intervals in the circumferential direction to selectively communicate with any one of the core 32 and the spout plate. A positioning gasket 3 having a locking protrusion 54 inserted into the insertion grooves 46 and 50 of 36 and disposed between the core 32 and the spout plate 36 in a peripheral area of the core 32 and the spout plate 36.
4. A nozzle comprising positioning means comprising: 4.