JPS5811975B2 - What's new? - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection dilution device for injecting and diluting pesticides and the like into a main water supply pipe in a pipeline system for spraying pesticides and the like.

Most of the conventional continuous dilution devices for pesticides, etc. use the water pressure in the main water pipe to inject the pesticide, etc. into the main water pipe. The differential pressure between the front and rear is used as the driving source for the diluter.

Therefore, it is necessary to increase the pump capacity by the difference in pressure, and it is also necessary to increase the diameter of the pipeline in order to minimize pressure loss.

Furthermore, if such a device is installed in an existing pipeline system, the discharge pressure of the sprinkler at the end will decrease, making it impossible to achieve uniform spraying in each spraying block, and trying to compensate for this will result in unnecessary overspraying. In some cases, this is virtually impossible.

In view of these points, the device of the present invention uses compressed air, which is easily available at such sites, to inject chemical solutions without relying on water pressure for driving force, and achieves the intended purpose with an extremely simple configuration. This is what we aim to achieve.

This will be explained with reference to the illustrated one.

1 indicates the main water supply pipe, A indicates the water source side, and the mouth indicates the distribution side.

2 is a flow meter 3 installed in the middle of the main water supply pipe 1, which is a chemical liquid metering tank whose bottom and top cover are each formed into a conical shape, and one end of a chemical liquid injection pipe 4 is attached to the top corner of the tank bottom, and the other end is used for water supply. It is connected to the spray side of the main pipe 1 from the flow meter 2 via a check valve 5.

An air vent pipe 6 is attached to the top corner of the same type of upper cover, and a pressure air pipe 7 communicating with the compressor 8 is attached to the conical surface of the same type.

Reference numerals 9 and 10 indicate on-off valves provided in the air vent pipe 6 and the compressed air pipe 7, respectively.

Furthermore, a chemical solution supply pipe 12 of the liquid collection tank 11 is attached near the bottom of the chemical solution metering tank 3.

13 is a check valve provided in the interpipe.

15 is a signal wiring connecting the flow meter 2 and the compressor 8;
16 and 16 are signal wirings connecting the flowmeter 2 and the on-off valves 9 and 10, respectively.

Reference numeral 14 denotes a float which is placed at the top corner of the bottom of the tank when the chemical solution metering tank 3 is empty, and at the top corner of the top lid when the tank is filled with the same kind of drug.

The one in Fig. 2 has two chemical liquid metering tanks 3', 3' arranged side by side, chemical liquid injection pipes 4', 4', and a check valve 5.
'.

5', air vent pipes 6', 6', compressed air pipes 7', 7', chemical solution supply pipes 12', 12', check valves 13', 13', float 14'.

14' etc. are also cut one piece each to correspond to this.

Further, the on-off valves 9'' and 10'' are three-way valves in order to reduce the number of valves used.

Its effects will be explained.

Under normal conditions, the on-off valve 10 is closed and the on-off valve 9 is open, so that the chemical liquid in the chemical liquid tank 11 is filled into the chemical liquid metering tank 3 by pushing open the check valve 13 from the chemical liquid supply pipe 12 due to the natural head. be done.

As a result, the float 14 floats up and finally fits into the top corner of the upper lid of the same type, closing the opening of the air vent pipe 6.

Next, when a certain amount of water flows through the main water pipe 1, the flow meter 2 detects this and issues a signal, which causes the on-off valve 10 to
is opened and the on-off valve 9 is closed.

As a result, compressed air from the compressor 8 is introduced into the tank through the compressed air pipe 7, and the pressure of this compressed air is sufficient to push open the check valve 5 and overcome the water pressure in the main water pipe 1. Therefore, the chemical liquid filling the chemical liquid metering tank 3 is pushed out from the same type and injected into the water supply main pipe 1 through the chemical liquid injection pipe 4.

When all the chemical solutions in the tank have been injected, the float 14 sinks to the bottom corner of the tank and closes the opening of the injection pipe 4.

Therefore, compressed air does not get mixed into the main water pipe 1.

When one injection is completed in this way, the on-off valves 9 and 10 are switched, valve 9 is opened and valve 10 is closed, and the metering tank 3 is filled with the chemical solution again, and the next chemical injection is performed. Prepare for.

Then, the next signal from the flowmeter 2 causes the valve 9 to close, and the valve 1 to close.
0 is open and the drug solution injection is repeated.

In this way, by operating the on-off valves 9 and 10 in accordance with the signal emitted from the flow meter 2 every fixed amount of water in the main water pipe 1, it is possible to inject an amount of chemical liquid proportional to the amount of water being sent.

Note that it is of course possible that the check valve 5 is an on-off valve operated by a signal from the flow meter 2.

In the case shown in Fig. 2, such operations are performed alternately in the left and right chemical liquid metering tanks 3' and 3', so that the chemical liquid is injected more densely and uneven mixing of the chemical liquid does not occur. The dilution effect can be enhanced.

As described above, the present invention does not require any consideration such as increasing the diameter of the water main pipe in order to reduce the pressure loss as in the past, and has a simple mechanism that utilizes compressed air, which is easily available on site. This purpose can be achieved, and even if there is no compressed air equipment, a small compressor is sufficient, and furthermore, even if it is attached to an existing chemical spraying device, it will not affect the spraying at all.

This device has a simple configuration, which makes it easy to clean the chemical solution and provide easy corrosion resistance treatment.Also, the on-off valve used in this device controls air, so it is relatively small. The power consumption is also low, and remote-controlled autonomous driving is possible.

Moreover, since the entire device can be made small and lightweight, and there is no possibility of failure during operation, maintenance and inspection are easy, continuous operation is possible, and there are no restrictions on the spraying area.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of the present device, and FIG. 2 is a longitudinal side view showing another embodiment. 1... Water supply main pipe, 2... Flow meter, 3... Chemical solution metering tank, 4
...Medical solution injection pipe, 6...Air vent pipe, 7...Pressure air pipe, 9,
10... Opening/closing valve, 11... Chemical liquid tank, 12... Chemical liquid supply pipe, 14... Float, 16... Signal wiring.

Claims (1)

[Claims] 1 Connect the chemical solution supply pipe from the chemical solution tank and the compressed air pipe from the compressed air source to the chemical solution metering tank, and install an air vent pipe at the upper end of the chemical solution metering tank and a chemical solution injection pipe leading to the main water supply pipe at the lower end,
Further, the chemical liquid metering tank has a built-in float for opening and closing the air vent pipe and the chemical injection pipe, and the on-off valves provided in the compressed air pipe and the air vent pipe, respectively, and the flow meter provided in the main water pipe are connected by signal wiring. An injection dilution device for pesticides, etc., in which the on-off valve is opened and closed in response to signals from the flowmeters.