JPS5832755Y2 - spray nozzle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spray nozzle used for spraying a herbicide liquid.

In general, herbicides are broadly classified into foliar treatment type herbicides and soil treatment type herbicides, and consideration needs to be taken when spraying depending on the characteristics of each. This means keeping the amount of energy to a minimum.

By the way, various devices are used for spraying herbicides, but the main one used is a sprayer, and the spray nozzle for spraying herbicides used in this sprayer is a conventional one. The spray nozzle was modified to remove coarse particles (300-500
There are two methods: one is to spray water (about 50 μm) in the form of atomized particles, and the other is to attract and mix air into the atomized chemical solution to create soft, foamy water with little cohesion.

However, in reality, the conditions imposed on spray nozzles when spraying chemical solutions include the characteristics of each chemical manufacturer, the type and growth rate of weeds to be weeded, the season, relationship with adjacent crops, and the type and pressure of the pump used. There are a wide variety of situations, and the current situation is that conventional spray nozzles with fixed performance cannot adequately handle them.

The present invention was developed with the aim of providing a spray nozzle with elasticity that can adapt as much as possible to these various work demands. a plurality of air intake holes, each of which is perforated in the base and communicates with an internal chemical liquid passage; and a plurality of air intake holes rotatably fitted around the base peripheral wall, and the same number of ventilation holes as the air intake holes are perforated at equal intervals. An air length adjustment ring is provided, and the mixing ratio of air to the chemical solution is adjusted by rotating this ring.

The present invention will be explained below with reference to embodiments shown in the drawings.

The spray nozzle 1 has a spout body 2 connected to a sprayer body (not shown).

This nozzle main body 2 has a recess 3 at one end in which a female thread 4 is carved to be screwed into the sprayer main body.
A center hole 5 is bored in the center of the container and extends to the other end, and this center hole 5 serves as a mixing chamber for a chemical solution and air, which will be described later.

Note that both ends of this mixing chamber 5 are trumpet-shaped expanded portions 6', 6', respectively.

At the innermost part of the recess 3, a disk 7 having an orifice 8 is held by a flat packing 9, and the chemical solution flows into the expanded portion 6 of the mixing chamber 5 through the orifice 8 of this disk 7. There is an influx.

As shown in detail in FIG. 2, this expanded portion 6 has four air intake ports 10 extending in the radial direction and communicating with the outside.
10... are drilled at equal angles.

Therefore, these air intake ports 10 are opened in the main body peripheral wall 11 at equal intervals in the circumferential direction.

An air conditioning ring 12 is rotatably fitted around the peripheral wall 11 which has an air population of 10 degrees. This is done with a relatively large resistance due to the O-ring 14.

The air volume adjustment ring 12 has the same number of ventilation holes 15, 15 as the air intake ports 10, which are equally spaced apart. This makes it coincide with the air intake port 10 of the nozzle main body 2.

A cylindrical body 17 is attached to the male screw 16 on the peripheral wall of the tip end of the nozzle main body 2.
A female thread 18 is screwed together.

A partition wall 19 that divides the interior of the cylinder 17 into two in the axial direction of the cylinder 17 is integrally provided within the cylinder 17 .

And, the part on the side of the spout main body 2 from this partition wall 19,
Four passages 20, 20... that communicate between the inside and outside of the cylinder body 17.
... has been drilled.

On the other hand, on the opposite side of the partition wall 19, as shown in detail in FIG. 3, a pivot seat 21 is formed.
is the central internal cavity 22, and this cavity 22 and the cylinder 1
Four passages 23, 23... that communicate with the outside of 7.
・Consists of.

These passages 23 are inclined with respect to the radial direction of the internal cavity 22, and therefore from each passage 23 to the internal cavity 22
The fluid injected into this interior cavity 22 is adapted to form a vortex.

A nozzle cap 2 is attached to the middle male thread 24 of the nozzle main body 2.
The cap 25 is screwed together with the cylindrical body 1.
This cylindrical body 17 is completely covered so as to be spaced apart from the peripheral wall 26 of No. 7.

A nozzle 28 is formed in the end wall 27 of the cap 25 coaxially with the center of the internal space 22, and the distance between the nozzle 28 and the pivot seat 21 of the cylindrical body 17 is the same as that of the cap 25.
It is adjusted by rotating.

Note that watertightness between the spout cap 25 and the spout body 2 is achieved by an O-ring 3 installed in the annular groove 29 of the spout body 2.
0.

Next, the operation of the above-described embodiment will be explained.

The chemical liquid that is pressurized from the sprayer main body (not shown) and forced into the recess 3 of the nozzle main body 2 becomes a high-speed flow when passing through the orifice 8 of the disk 7, causing a contracted flow at the outlet of the orifice 8. , creating a state of reduced pressure below atmospheric pressure around it.

This pressure reducing part is the ventilation hole 15.15 of the air volume adjustment ring 12.
...and the air intake port 10.10 of the nozzle body 2
Air is sucked in from the outside through...

Then, this high-speed flow of the chemical liquid advances into the mixing chamber 5, accompanied by the sucked ambient air, and the chemical liquid and air mix vigorously.

This mixed fluid then passes through the passages 20, 20...
The water passes through to form a vortex in the internal cavity 22, and is dispersed from the nozzle 28 in the form of fine mist bubbles.

The spray of water bubbles with air as the nucleus, which is created by mixing air with a chemical solution, and is sprayed in this way differs from mist droplets in the form of coarse water particles in many respects.

In other words, when spraying coarse particles, the particles are water alone and have a large weight, so they tend to fall without floating. On the other hand, because the speed is high, when they collide with an object, they produce repulsive droplets, and Particles may collide with each other during flight and become ultra-fine particles that become airborne.

On the other hand, particles mixed with air are apparently larger than airless particles, but because they are hollow, they are lighter in weight, and when released into the atmosphere and encounter air resistance, they easily decelerate and fall immediately without floating. do.

However, it is not so light that it can float on the wind.

When these hollow particles collide with an object, the bubbles break and sit gently, so they do not scatter.

Furthermore, since the hollow particles are formed to have approximately the same size, the generation of ultrafine particles that float before falling is significantly less than that of airless spraying.

Therefore, there is very little damage to adjacent crops when spraying, and secondly, most of the chemicals have some viscosity, so all of the microbubbles that sit on the spray disappear immediately. 20 to 30 subdivided into 20 to 30
Since it can be visually observed in a cloudy form in seconds, it is possible to prevent leakage and double spraying, and it is also possible to improve work efficiency and economic efficiency.

In this way, the spray nozzle 1 that mixes air
Spraying the herbicide by using the spray nozzle 1 is an effective method, and it is also convenient because the spray nozzle 1 is of a variable distance type.

That is, when the weeds are tall and it is desired to reach the lower part of the weed, the nozzle cap 25 is twisted back to the right in FIG. 1 to widen the distance between the rotating seat 21 and the nozzle 28.

This results in a jet spray in which the spray angle is narrow and the hollow particles of the chemical solution reach a long distance.

In addition, if the weeds are short and the entire surface is to be sprayed, screw the nozzle cap 25 to the left in FIG.
1 and the nozzle 28 is narrowed.

This results in a mist spray that has a wide spray angle and is diffused over a short distance.

However, these jet sprays and mist sprays
It is affected by the characteristics of each manufacturer of the chemicals used, the type and pressure of the pump used, etc., as mentioned above, and the outflow speed of the nozzle also changes when the spray diffusion angle is changed, so it is important to always maintain an appropriate air mixing ratio. is required to be maintained.

For this purpose, the air amount adjusting ring 12 may be rotated to change the overlapping area between the air intake port 10 of the nozzle body 2 and the vent hole 15 of the ring 12.

Then, the amount of air taken into the mixing chamber 5 can be adjusted.
All you have to do is adjust it to the optimum condition while monitoring the condition of the mist during spraying.

As mentioned above, in the spray nozzle according to the present invention, since the air volume adjustment ring with the ventilation hole bored in the equiangular corner is rotatably fitted around the air intake port, the rotation of the nozzle It is an excellent product that can always mix the appropriate amount of air into the chemical solution, and therefore can fully demonstrate the ability of the air-mixing herbicide sprayer, which includes a variable distance nozzle, and can always perform appropriate weeding work. be effective.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the jet nozzle according to the present invention, FIG. 2 is a sectional view of a corresponding portion taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 1. FIG. 1... Spray nozzle, 2... Spout body,
5...Mixing chamber, 7...Disc, 10. T
o...Air intake port, 12...Air volume adjustment ring, 15.15...Vent hole, 17...
... Cylinder body, 21 ... Swivel seat, 22 ...
・Internal void, 23.23... passage, 25...
... spout cap, 28... spout.

Claims (1)

[Scope of utility model registration request] A plurality of air intake holes are formed in the base peripheral wall at equal intervals in the circumferential direction and each communicates with an internal chemical liquid passage; 1. A spray nozzle comprising: an air amount adjusting ring in which the same number of ventilation holes are formed at equal intervals.