JPS5823402Y2 - Chemical liquid automatic mixing and spraying device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spraying device that automatically mixes and sprays a chemical solution using a sprinkler such as a sprinkler.

In recent years, an automatic chemical mixing device has been added to a sprinkler watering device and is often used for spraying pest control chemicals, herbicides, liquid fertilizers, and the like.

Here, the automatic chemical mixing method includes two methods: a source mixing method in which a chemical tank is installed adjacent to the water source tank and the chemical is mixed in at the root of the water main, and the other is the original mixing method in which a chemical tank is installed adjacent to the water source tank and the chemical is mixed in at the root of the water main, and the other is in front of each chemical spraying block that branches off from the water main. The block-by-block mixing method that mixes with
There is a ``terminal pre-mixing'' method in which a chemical container is attached to the riser pipe of the sprinkler and the chemical is mixed in.

However, in any of the above cases, complex control is required to start the chemical spraying and to stop the water supply after the chemical spraying is finished.In this case, if the water supply is not stopped immediately after the chemical spraying is finished, the sprayed chemical will be washed away. There were times when I ended up.

Further, it has the disadvantage that large-scale residual liquid treatment equipment is required to send and discharge pressurized water or compressed air to discharge the chemical liquid remaining in the piping.

In order to address the above-mentioned circumstances, the present invention automatically starts spraying the chemical solution by simply sending pressurized water from the water supply main, stops water supply immediately when the chemical solution in the chemical container runs out, and removes the remaining chemical solution. It is an object of the present invention to provide a spraying device that discharges naturally without requiring pressurized water or compressed air.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a partially cutaway front view of a chemical liquid spraying device according to the present invention.

The chemical liquid container 1 is a cylindrical container made of metal, synthetic resin, or the like, and stores a chemical liquid in its upper half.

The pressure water port 2 is bored in the bottom 3 of the chemical liquid container 1, and allows the pressure water sent from the water sprinkler pipe 39 shown in FIG. 2 to flow into the chemical liquid container 1.

The pressure water outlet 4 is bored at a position on the side wall 5 of the chemical liquid container 1 at a position slightly below the height of the side wall 5, and allows the pressure water that has flowed into the chemical liquid container 1 to flow out to the outside.

The drug solution supply port 6 is bored in the ceiling part 7 of the drug solution container 1,
This is for replenishing an appropriate drug solution into the drug solution container 1.

Note that a funnel 8 is provided above the chemical solution replenishment port 6 to facilitate replenishment of the chemical solution.

Note that the funnel 8 may not be provided and only a normal lid may be attached.

The drug solution outlet 9 is bored in the ceiling part 7 of the drug solution container 1,
This is to send the chemical solution inside the container to the outside.

The piston 10 is fitted into the liquid medicine container 1 so as to move up and down while closely contacting the inner wall thereof.

The height of the piston 10 is such that when its lower end 11 is in contact with the bottom 3 of the chemical liquid container 1, the side part 13 of the upper end 12 closes the pressure water outlet 4, and the upper end 12 is in contact with the ceiling 7 of the chemical liquid container 1. In this case, the side portion 14 of the lower end 11 is at such a height as to open the pressure water outlet 4.

That is, since the pressure water outlet 4 is bored at a position slightly below the height of the chemical liquid container 1 as described above, the height of the piston 10 must be exactly the same as the height of the chemical liquid container 1. is desirable.

Therefore, the upper half of the drug solution container 1 forms the drug solution storage chamber 15.

The vent hole 16 is located directly above the pressure water inlet 2 and the piston 1
It is perforated from the lower end 11 of 0 to the upper end 12.

Check valves 19 and 20 each consisting of a ball valve and a spherical seat are provided at the lower end opening 17 and upper end opening 18 of the ventilation hole 16, respectively.

Here, the check valve 19 allows air to flow from the pressure water inlet 2 toward the vent hole 16, but does not allow water to flow.

On the other hand, the check valve 20 allows air to flow from the vent hole 16 to the chemical liquid storage chamber 15, but does not allow the flow of the chemical liquid from the chemical liquid storage chamber 15 to the vent hole 16.

Therefore, only air flows through the ventilation hole 16 from the check valve 19 to the check valve 20.

The effects of this air circulation will be described later. The spreader 21 is
It sprays a mixture of chemical solution and water, and has a spray nozzle 23 at the upper end of the riser pipe 22, a venturi part 24 at the middle part,
It has a drain valve 25 at the lower end.

The venturi portion 24 is caused to close to the chemical liquid storage chamber 15 by negative pressure generated by pressure water flowing through the throat portion 26 at an increased speed.
This is to suck the chemical liquid from the tank and dilute and mix the pressure water and the chemical liquid at a constant ratio.

The liquid drain valve 25 automatically discharges the chemical liquid remaining in the riser pipe after the chemical liquid spraying is finished by reducing the pressure inside the pipe.

Its structure consists of a ball valve 27, a valve seat 28, and a spring 29.

The automatic shutoff valve 30 sends pressure water from the watering line pipe 39 shown in FIG. The water supply to the sprayer 21 is automatically stopped.

Its structure consists of a valve box 31, a ball valve 32, a valve seat 33, and a spring 34.

To use the automatic chemical mixing and dispersing device according to the present invention, first open the manual valve 35 of the funnel 8 shown in FIG. .

Next, the manual valve 36 is opened and the single-action cutoff valve 30 is opened to the chemical liquid container 1.
Open the flow path to.

Next, when the stop valve 37 shown in FIG. 2 is opened, pressurized water flows from the water main pipe 38 through the water line pipe 39 and into the chemical solution container 1.

At this time, prior to the inflow of pressurized water, the residual air in the water spray pipe 39 rises inside the pipe, causing the piston 10 in the chemical liquid container 1 to rise.
It flows into the chemical solution storage chamber 15 through the ventilation hole 16 .

This air becomes bubbles and rises in the chemical solution, and during this rise, the drug solution is stirred.

The bubbles that have risen to the ceiling portion 7 are discharged from the nozzle 23 through the chemical solution delivery port 9 and the piping 40 .

In addition, when the amount of air flowing into the chemical solution storage chamber 15 is large and there is a risk of explosion of the chemical solution container 1, it is desirable to provide an air exhaust valve in the ceiling part 7.

When all the residual air in the water line pipe 39 is exhausted, the pressure water flows into the chemical liquid container 1 through the pipe 41, and the piston 1
Increase 0.

As the piston 10 rises, the chemical liquid in the chemical liquid storage chamber 15 passes from the storage chamber 15 through the piping 40 and reaches the magnification piece 42.
A limited amount is sent to the venturi section 24.

At the same time as the above-mentioned pressure water flows into the chemical liquid container 1, the pressure water pushes up the ball valve 32 and valve seat 33 of the automatic shutoff valve 30 against the spring 34, and pushes up the riser pipe 22 of the sprayer 21.
The liquid flows into the venturi portion 24, is accelerated by the throat 26 of the venturi part 24, and is mixed with the chemical while sucking the chemical from the pipe 40, and is sprayed from the spray nozzle 23 as a diluted chemical.

At this time, the drain valve 25 is closed by pressing the ball valve 27 against the valve seat 28 by the pressure water, so that the chemical liquid does not flow out here.

When all the chemical liquid in the chemical liquid storage chamber 15 is sent out, the lower end 11 of the piston 10 rises to above the pressure water outlet 4,
Since the pressure water outlet 4 is opened, the pressure water that has flowed into the lower half of the chemical solution container 1 flows from the pressure water outlet 4 through the piping 43 to the automatic shutoff valve 30 and pressurizes the upper surface of the valve seat 33.

Therefore, the pressures acting on the upper and lower surfaces of the valve seat 33 are balanced, but the restoring force of the spring 34 causes the valve seat 33 to descend as shown by the two-dot chain line in FIG. block the road.

That is, since the water supply to the sprayer 21 is automatically stopped after all the chemical solution has been sprayed, there is no possibility that fresh water is sprayed from the spray nozzle 23 and the sprayed chemical solution is washed away.

When the water supply to the sprayer 21 is stopped by the operation of the automatic shutoff valve 30, the pressure inside the riser pipe 22 decreases.
The ball valve 27 is pushed down by the spring 29, the drain valve 25 is opened, and the remaining chemical solution in the riser pipe 22 is automatically drained.

When the chemical liquid has been sprayed in this way, when the antifreeze valve shown in FIG. teeth,
It is discharged from between the above antifreeze frames.

In addition, when performing normal watering without spraying a chemical solution, if the manual valve 36 is closed, the pressure water from the water line pipe 39 will not flow into the chemical solution container 1, and water will be sprayed from the sprayer 21. .

Since the present invention is constructed as described above, the chemical solution is automatically diluted and sprayed by simply sending pressure water from the water supply main pipe 38 without requiring any complicated control, and when the chemical solution in the chemical solution storage chamber 15 runs out. Water supply will be automatically stopped immediately.

Therefore, the chemical solution that has already been sprayed will not be washed away.

In addition, since the chemical liquid container 1 is attached to each of the sprayers 21, the total heat chemical liquid will not be mixed into the water supply main pipe 38 and the water spray line pipe 39, so corrosion of each pipe can be prevented. The service life of the entire equipment can be increased.

Further, since a drain valve 25 is provided at the lower end of each sprayer 21, which opens automatically when the pressure inside the pipe decreases, the residual chemical solution can be easily drained without requiring pressurized water or compressed air.

Furthermore, since the chemical liquid container 1 is attached to each sprayer 21, even if the area to which the chemical liquid is to be sprayed is a very small area, the chemical liquid can be sprayed only in that area.

In addition, since the piston 10 is provided with the vent hole 16, the residual air in the water distribution pipe is circulated, thereby making it possible to stir the chemical solution in the chemical solution storage chamber 15 prior to dispersing the chemical solution.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of an automatic chemical mixing and dispersing device according to the present invention, and Fig. 2 is an explanatory diagram of a chemical dispersing equipment using the device according to the present invention.・Medical solution container, 2... Pressure water inlet,
4... Pressure water outlet, 6... Chemical solution supply port, 9... Chemical solution delivery port, 10... Piston, 15... Chemical solution Containment chamber, 16...Vent hole, 19°20...Check valve, 21...
・Spreader, 22...Rise pipe, 23...
... Spraying nozzle, 24 ... Venturi part, 2
5... Drain valve, 26... Throat, 30.
...Emotional cutoff valve.

Claims (1)

[Scope of utility model registration request] A cylindrical chemical solution container 1 having a pressure water inlet 2 at the bottom, a pressure water outlet 4 at one side wall, and a drug solution supply port 6 and a drug solution delivery port 9 at the ceiling; It moves up and down while being in close contact with the inner wall, and has a height such that the side part of the upper end closes the pressure water outlet 4 when it is in the lowered position and opens the pressure water outlet 4 when it is in the raised position. A piston 10 having an opening adjacent to the pressurized water inlet 2 when the piston 10 is in the lowered position, penetrating through the piston 10 from the lower end to the upper end, and having a lower end opening and an upper end opening. The riser 22 has a venturi portion 24 in the middle thereof, in which a vent hole 16 having a check valve 19, 20 and a throat 26 communicating with the drug solution outlet 9 of the drug solution container 1 are formed. Spraying nozzle 23 at the upper end of 22,
A sprayer 21 having a drain valve 25 at the lower end supplies pressure water to the chemical liquid container 1 and the sprayer 21, and when the chemical liquid in the chemical liquid container 1 runs out, pressure water flows in from the pressure water outlet 4. An automatic chemical mixing and dispersing device characterized by comprising an automatic shutoff valve 30 that stops water supply to the dispersion device 21 when