JPH04131154A - Foaming and ejecting device for chemical substance solution - Google Patents

Abstract

PURPOSE:To ensure adequate scattering distance and stable bubble ejection by providing an ejection tube equipped with an air supply orifice which supplies air to the ejection part of a nozzle ejection a mixed liquid and a baffle board with holes on the surface which is arranged on the secondary side of the nozzle for the ejection tube. CONSTITUTION:A pump 7 sends under pressure a highly pressurized mixture liquid containing a solution consisting of a surfactant and chemical substance. A ejection tube 31 equipped with an air supply orifice 29 which supplies air to the ejection part of a nozzle 15 is formed on the secondary side of the nozzle 15 ejecting the mentioned mixture liquid. In addition, a baffle plate having holes 41, 43 is arranged on the secondary side of the nozzle 15 for the ejection tube 31. Subsequently, adequate discharge amount and scattering distance are obtained so that bubbles can be ejected stably.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to agricultural chemicals, disinfectants, fungicides, insecticides, deodorizers, mold inhibitors, preservatives, soil conditioners, water-based paints, dust prevention agents, etc. A device that foams and sprays a solution containing a chemical substance, and injects a mixture of a surfactant and a chemical solution at a particularly high jetting pressure and collides with a baffle plate to foam and spray powerfully. Regarding what you choose to do.

(Prior Art) Conventionally, when spraying chemicals such as agricultural chemicals or spraying paints, etc., it is common to spray or apply them as a mist.

However, when spraying, the spray may be applied to the body or may enter the body through breathing, which poses problems such as harming the health of workers.

In addition, the spray spreads over a wide area other than the target object, causing problems such as affecting the health of others and emitting a bad odor.

(Problems to be Solved by the Invention) To solve this problem, it has been considered to spread the chemical in the form of foam to prevent workers from being contaminated with the chemical.

As such, for example, JP-A-63-230
There is one shown in Publication No. 028.

That is, the chemical is injected from a nozzle, air is sucked in by the venturi effect of the injection, and the chemical is dispersed in the form of foam.

However, in this case, a restriction is formed to produce the Hentschli effect, and the injection pressure is also assumed to be low. Therefore, there was a problem in that the amount of foam discharged was not sufficient and the flight distance could not be ensured sufficiently.

The present invention has been made based on the above points, and an object thereof is to provide a foam injection device that can continuously and stably inject foam while ensuring a sufficient discharge amount and flying distance. be.

(Means for Solving the Problems) In order to achieve the above object, a foaming injection device according to the present invention includes a pump that pumps a mixture of a solution containing a surfactant and a chemical substance under high pressure, and a pump that injects the mixture. an injection pipe having an air supply hole arranged on the secondary side of the nozzle and supplying air to the injection part of the nozzle; and an injection pipe arranged on the secondary side of the nozzle of the injection pipe and having a hole on its surface. It is characterized by comprising a baffle plate.

(Operation) A mixed liquid of a solution containing a surfactant and a chemical substance is pumped under high pressure and sent to a nozzle. Then, the liquid mixture is injected from a nozzle. On the secondary side of the nozzle, there is arranged an injection part C of the nozzle: an injection pipe equipped with an air supply hole for supplying air, and the liquid mixture draws in air and is sent into the injection pipe before colliding with the baffle plate. . As a result, the mixed liquid and air are mixed and bubbles are generated. Further, the generated bubbles are pushed out from the holes in the baffle plate by the liquid mixture sent into the injection tube, and are ejected from the opening at the tip of the injection tube.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a block diagram showing the overall structure of the foaming injection device according to the present embodiment. First, there is a pistol-type spray gun 1, and a supply pipe 5 is connected to the grip portion 3 of the spray gun 1. This supply line 5 is connected to a tank 9 via a pump 7.

The tank 9 is filled with a mixture of a surfactant and a chemical solution, which is pressurized by the pump 7 and supplied to the supply pipe 5.
It is supplied to the spray gun 1 through.

As shown in FIG. 2, the spray gun 1 has a barrel 11 formed with a conduit 13 that is continuous with the supply tube 5, and the tip of the conduit 13 is a nozzle 15 having a substantially truncated conical shape.

The nozzle 15 has a slightly larger diameter (approximately 2 mm in this embodiment), and the ejection portion is open to the atmosphere as described later, so that air is drawn in.

Further, a valve member 17 is arranged in front of the nozzle 150, and a valve seat 19 is arranged in the conduit 13, and a tapered valve body 21 that fits into the valve seat 19 is formed. The valve body 21 is attached to a valve stem 23. The valve stem 23 is supported inside the conduit 13 so as to be able to move forward and backward, and is normally biased in the valve-closing direction by a spring 25. The valve is opened by retracting the valve.

An injection pipe 31 is formed on the secondary side of the nozzle 15 and includes an air supply hole 29 for supplying air to the injection portion of the nozzle 15 . The injection pipe 31 has a cylindrical shape, and air supply holes 29 are provided at four locations around the injection portion of the nozzle 15 to constitute an atmosphere open system.

A cover 33 is attached around the injection pipe 31, and a hole 35 is formed in a part of the cover 33, through which air is introduced.

In addition, the injection pipe 31 has a distal end portion with a diameter of 1.5 to 1.5 mm with respect to the base.
The diameter is expanded three times, and a baffle plate 39 is formed in this expanded diameter portion 37. The baffle plate 39 is a circular plate inscribed in the enlarged diameter portion 37 of the injection pipe 31, and has holes formed in its surface. As shown in Fig. 4, the arrangement of these holes is such that one slightly small hole 41 is provided in the center, and a plurality of slightly larger holes 43 (five in the figure) are formed at intervals around this hole. ing. In the case of this embodiment, the inner diameter of the enlarged diameter portion is approximately 2
When the diameter is 6 mm, the hole 41 in the center is set to about 3 mm, and the surrounding holes are set to about 5 mm.

The forward side of the directional baffle plate has an enlarged diameter portion formed to extend, and this tip opening 45 serves as a portion from which foam is injected.

The operation will be explained based on the above configuration.

First, the tank 9 is filled with a mixture of a surfactant and a chemical solution, and the pump 7 is activated to suck this mixture.
It is supplied to the spray gun 1 as high pressure.

When the operator holds the spray gun l and pulls the operating lever 27, the valve member 17 is opened and the mixed liquid is injected from the nozzle 15. This injection pressure is approximately 30 to 90
kg/c-d. When the mixed liquid is injected from the nozzle 15 at high pressure in this way, the jet stream moves forward inside the injection pipe 31 at high speed while involving the surrounding air, and reaches the enlarged diameter part 3 of the injection pipe 31.
7 and collides with the baffle plate 39. Due to this collision action, the liquid mixture and air are mixed and foamed. and,
This foaming liquid is pushed out from the holes 41, 43 by the mixed liquid injected from the rear and advancing, and is vigorously ejected from the tip opening 45 of the injection pipe. The enlarged diameter portion 37 provides a margin for foaming the mixed liquid and prevents it from flowing back toward the nozzle side.

Also, since a slightly smaller hole 41 is arranged in the center of the baffle plate 39 and slightly larger holes 43 are arranged around it, a part of the injected liquid mixture weakens the speed through the center hole 4]. Since the bubbles are ejected without slowing down, the bubbles generated by the collision can be ejected without reducing the speed.

According to this embodiment, the following effects can be achieved.

First, according to the foaming injection device of this embodiment, since the high-pressure mixed liquid is injected and foam is generated by colliding with the baffle plate, the amount of foam discharged is sufficient and stable foam can be produced. Can be issued continuously.

Moreover, since the discharge pressure of the bubbles is high, a flight distance of 6 to 7 meters can be obtained.

Therefore, since the chemical substance can be reliably and continuously sprayed in the form of bubbles to a distant place, spraying can be performed effectively and scattering of the chemical substance can be prevented.

Moreover, the structure is simple and the operation is reliable.

Note that the present invention is not limited to the above embodiment.

For example, the injection pipe is not limited to a cylindrical shape, but may be a rectangular tube shape or the like.

Further, the number and arrangement of holes in the baffle plate are not limited to those described above. The point is that it should be constructed so that it can function as a baffle plate and push out bubbles.For example, as shown in FIG. Punched metal may also be used.

Further, the injection pipe does not need to have an enlarged diameter at the tip side, and may be straight.

(Effects of the Invention) As detailed above, according to the foam injection device of the present invention, stable foam can be continuously injected and a sufficient flight distance can be achieved, and chemical substances can be effectively sprayed. can be done.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the foam injection device of the present invention, FIG. 2 is a sectional view showing the internal structure of the spray gun,
FIG. 3 is a sectional view showing the internal structure of the foam injection device, FIG. 4 is a sectional view taken along the line TV-IV in FIG. 3, and FIG. 5 is a sectional view showing another embodiment of the baffle plate. ■... Spray gun, 7... Pump, 5... Nozzle, 29... Air supply hole, 39... Baffle plate, 41.
43... hole. 9...tank, 1...injection pipe,

Claims (1)

[Claims] A pump that pumps a mixture of a solution containing a surfactant and a chemical substance under high pressure, a nozzle that sprays the mixture, and a pump that is arranged on the secondary side of the nozzle and supplies air to the injection part of the nozzle. 1. A foaming injection device for a chemical solution, comprising: an injection pipe provided with an air supply hole; and a baffle plate disposed on the secondary side of a nozzle of the injection pipe and having holes on its surface.