JPS6212433Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a nozzle used in a medicine sprayer, etc., and in particular, an air intake part that utilizes an ejector action is provided at the base of the discharge nozzle part, and the air taken in by this and the medicine liquid are separated. The present invention relates to a nozzle in which a chemical solution is mixed and the mixed chemical solution is sprayed.

Generally, when a chemical solution is sprayed using a chemical sprayer, a large amount of fine mist is generated, which scatters and adheres to other nearby crops and human bodies, causing chemical damage. To prevent this, conventional practice has been to take in air using an ejector action and spray the mixture of air and chemical liquid from a nozzle.

As shown in FIG. 1, a conventional nozzle utilizing an ejector action has a mixing chamber 2 inside a cylindrical body 1, and the mixing chamber 2 is connected to the outside air through an air intake hole 3.
Further, one end of an orifice 4 is opened in the mixing chamber 2, and the other end of the orifice 4 is connected to a pump (not shown).
via a chemical supply source (not shown).
The base of a nozzle pipe 5 is screwed to the tip of the cylindrical body 1, and an injection guide 6 is provided inside the cylindrical body 1.
is provided, the mixing chamber 2 and the nozzle pipe 5
are communicated by this injection guide 6. A predetermined number of discharge ports 7 are screwed to the nozzle pipe 5 at appropriate intervals.

Since the conventional nozzle has the above configuration,
The chemical liquid pumped from the chemical liquid supply source is injected into the mixing chamber 2 from the orifice 4. At this time, the mixing chamber 2 becomes negative pressure due to the ejector action, and outside air passes through the air intake hole 3 and flows into the mixing chamber 2. The chemical solution and air are mixed and injected into the nozzle pipe 5 through the injection guide 6, and sent to each discharge nozzle 7 by the nozzle pipe 5 to be sprayed. However, in this configuration, after the jet is ejected from the jet guide 6, the nozzle pipe 5 sends the jet to each discharge nozzle 7.
The air and the chemical liquid separate while being sent to the air and the chemical liquid, and the mixing ratio of the air and the chemical liquid in the mixed chemical liquid sprayed at each discharge nozzle part 7 is not constant, so the atomization of the chemical liquid is also not constant, and particles The disadvantage is that a mixture of fine and coarse particles is sprayed.

This idea was devised in view of the above-mentioned circumstances, and its purpose is to reduce the generation of fine mist, and to maintain the condition of the chemical solution supplied to the individual discharge nozzles formed in a predetermined number on the nozzle pipe. The object of the present invention is to provide a nozzle in which the atomization of the chemical solution is constant and the atomization of the chemical solution is also constant.

The details of this invention will be explained below based on the embodiments shown in the drawings.

FIG. 2 is a cross-sectional view of the discharge nozzle section attached to the nozzle according to this invention. In the figure, 11 indicates a nozzle pipe, and as shown in FIG. Several ejection nozzle portions 12 are formed. For this purpose, a cylindrical mounting boss 13 is welded to the nozzle pipe 11 as shown in FIG.
The inlet 8 of the cap is tightly closed via a check valve 15 and is removably fixed by a cap 17.
Further, the inlet 8 and the nozzle pipe 11 are communicated through a hole 14. As shown in FIG. 3, the chuck valve 15 has a thin film 15b stretched inside a link 15a, and this thin film 15b is provided with a slit 15c.

The base 10 includes a cylindrical piece 16 having an inlet 8, an orifice forming member 19 that is tightly installed in the cylindrical piece 16 via an O-ring 18, and can be attached and removed via the orifice forming member 19 by screwing into the cylindrical piece 16. It consists of a cylindrical body 20, possibly screwed together and provided with an outlet 9. A chamber 16a is provided in the cylindrical piece 16, an orifice 19a is formed in the orifice forming member 19, and a mixing chamber 21 is provided in the cylindrical body 20. 2
A cutout-shaped air intake portion 22 and a cylinder piece 1 opened at 0
6 are in communication with the outside air by holes 16b drilled in
It performs an ejector action by being injected into the mixing chamber 21 through a.

An injection guide 24 is bored in the cylindrical body 20 and communicates the mixing chamber 21 with the outlet 9. A crab-shaped nozzle tip 25 is removably screwed to the end of the cylindrical body 20 on the outlet 9 side via a packing 23.

Since this device has the above-described configuration, the chemical liquid supplied by the pump from the membrane liquid supply source passes through the hole 14 made in the nozzle pipe 11 as shown by the arrow in FIG. 13, then push open the split 15c of the check valve 15 and enter the inlet 8 provided in the cylinder piece 16. Entrance 8
The entered chemical solution enters the chamber 16a and the orifice 19a.
is injected into the mixing chamber 21. At this time, the inside of the mixing chamber 21 becomes negative pressure due to the ejector action, and the hole 16b
The outside air flows into the mixing chamber 21 through the air intake part 22, and the air and the chemical solution are mixed. The mixed chemical solution passes through the spray guide 24 and is immediately sprayed from the nozzle tip 25.

As described above, according to the nozzle of this invention, air and chemical liquid are mixed in the mixing chamber 21 and then immediately sprayed from the nozzle tip 25 through the spray guide 24, so there is almost no separation between the air and the chemical liquid. Therefore, as shown in FIG. 4, the mixing ratio of air and chemical liquid at each discharge nozzle 12 is constant, and the atomization of the chemical liquid is also effected by constant particles. Furthermore, since the cap 17, the orifice forming member 19, the cylindrical body 20, and the nozzle tip 25 are replaceable, the direction of the discharge nozzle 12 can be changed by replacing the cap 17, and by replacing the orifice forming member 19, the direction of the discharge nozzle 12 can be changed. Orifices of various shapes can be used, the size of the air intake part and the injection guide 24 can be changed by changing the cylindrical body 20, and the size of the injection guide 24 can be changed by changing the nozzle tip 25. It has the advantage of being able to use different types of nozzle tips.

Incidentally, the nozzle pipe 11 can be formed into a loop shape as shown in FIG. 5, and can be arbitrarily selected according to the intended use.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional nozzle, Fig. 2 is a sectional view showing a nozzle according to this invention, Fig. 3 is a plan view of the check valve 15 shown in Fig. 2, and Figs. 4 and 5 are a nozzle. It is a reduced perspective view which shows two types of shapes of a pipe. In the figure, 8...inlet, 9...exit, 1
0...Base, 11...Nozzle pipe, 12...Discharge nozzle, 13...Mounting boss, 14, 16b...
... Hole, 15 ... Check valve, 16 ... Cylinder piece, 16
a... Chamber, 17... Cap, 18... O-ring, 19... Orifice forming member, 19a... Orifice, 20... Cylindrical body, 21... Mixing chamber, 2
2...Air intake part, 23...Putskin, 24...
Injection guide, 25... is a nozzle tip.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An inlet at the base of a discharge nozzle is connected to a hole drilled in a nozzle pipe connected to a chemical liquid supply source,
A negative pressure generation chamber is provided in the base, the inlet of the base is connected to the negative pressure generation chamber, and a cylindrical body forming a part of the base has an air outlet opening toward the negative pressure generation chamber. A nozzle comprising an inlet and an inlet communicating with an outlet of the base to form a nozzle tip. 2. The nozzle according to claim 1, wherein an ejector is configured in the negative pressure generating chamber. 3. The nozzle according to claim 1, wherein the nozzle pipe is formed in a straight tube shape. 4. The nozzle according to claim 1, wherein the nozzle pipe is formed in a loop shape.