JPS5811176Y2 - How to get the best experience possible - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a residual liquid recovery piping device for recovering residual liquid in a spraying pipe after spraying of agricultural chemicals such as agricultural chemicals and fertilizers.

In a conventional agricultural chemical spraying device, as shown in Fig. 1, a liquid sending pipe a and a residual liquid collection pipe are installed together, and a collection branch pipe is branched from this on the spraying side from a solenoid valve C that controls spraying. d, and an automatic valve e, which is automatically opened and closed by hydraulic pressure, as shown in FIG. 2, for example, is provided.

When the spraying chemical solution is sent by opening the solenoid valve C, the fluid pressure pushes the valve body f of the automatic valve e downward against the tensile force of the tension spring g, and the automatic valve e closes automatically. Then, the recovery pipe is closed and the chemical solution is dispersed.

When the spraying is finished, by closing the solenoid valve C,
When the hydraulic pressure of the automatic valve e is reduced, its valve body is pulled up by the tension spring g and opened, and the remaining liquid in the dispersion pipe is recovered through the recovery pipe.

However, the pressure inside the collection branch pipe d is usually lower than that inside the spray pipe, and therefore, the automatic valve e is not activated until the spray pipe is filled with liquid by opening the solenoid valve C and the sprinkler 1 starts spraying. During this time, the chemical solution will leak from here and flow into the collection pipe.

In other words, the automatic valve will not close until the spray pipe is filled with liquid and a certain level of liquid pressure is generated, and the automatic valve is slow to operate due to its structure, and the design or adjustment of the spring g itself is very delicate. It's difficult.

In the present invention, in order to avoid such drawbacks, the piping is devised so that the automatic valve on the collection branch pipe d can be activated quickly and easily at the same time as spraying is started.

The illustrated items will be explained.

1 is a liquid feeding pipe, and 2 is a liquid feeding branch pipe branched from this.

The liquid feeding branch pipe 2 is provided with an on-off valve 5 such as a solenoid valve.

Further, the liquid feeding branch pipe 2 is connected to the dispersion pipe 3 and the recovery branch pipe 4 at a branch point m.
Branches are formed at

An automatic valve 6 that is automatically operated by hydraulic pressure is provided on the recovery branch pipe 4.

The branching angle between the dispersion pipe 3 and the recovery branch pipe 4 at the branch point m with respect to the liquid sending branch pipe 2 and the relationship between the diameters of the dispersion pipe 3 and the recovery branch pipe 4 are determined as follows.

Now, the internal branching angle of the dispersion pipe 3 with respect to the liquid feeding branch pipe 2 is α, and the branching internal angle of the collection branch pipe 4 with respect to the liquid feeding branch pipe 2 is β.
When the diameter of the collection branch pipe 4 is D and the diameter of the collection branch pipe 4 is d, it is determined that α≧β D≧d.

In the case of FIG. 3, the branching internal angle β of the collection branch pipe 4 is zero, that is, the collection branch pipe 4 is provided on an extension of the liquid feeding branch pipe 2.

Reference numeral 7 denotes a recovery pipe, which is arranged in parallel with the liquid feeding pipe 1.

The end of the collection branch pipe 4 is connected to the collection pipe 5.

The action and effect will be explained.

When the on-off valve 5 is opened, the chemical solution will flow from the liquid feed pipe 1 to the liquid feed branch pipe 2, through the branch point m, and to the dispersion pipe 3 and the collection branch pipe 4. The relationship between the internal branching angles α and β formed with the liquid feeding branch pipe 2 and the diameters, d, of the dispersion pipe 3 and the collection branch pipe 4 is α≧β D≧d, which is 1;).

Here, in FIG. 3, the internal branch angle α of the dispersion pipe 3 is a right angle, the internal branch angle β of the recovery branch pipe 4 is zero, and the dispersion pipe 3 is a single pipe consisting of the liquid sending branch pipe 2 and the recovery branch pipe 4. Since it is in a state where it is branched at a more right angle, the liquid feeding branch pipe 2
The chemical liquid flows directly to the recovery branch pipe 4 and immediately fills the intermediate pipe 4, and the dispersion pipe 3 is filled with a slight delay.

Further, in FIG. 4, the internal branching angle α is larger than the internal branching angle β, but if the congruent internal angles are equal, the chemical solution from the liquid feeding branch pipe 2 will flow equally into the dispersion pipe 3 and the collection branch pipe 4 at the same time. As shown in the figure, since the branching internal angle α is larger than the branching internal angle β, the chemical solution easily flows toward the collection branch pipe 4 and is difficult to flow toward the dispersion pipe 3.

Therefore, the collection branch pipe 4 is filled with the chemical solution first, and the dispersion pipe 3 is filled with it a little later.

That is, in the present invention, the automatic valve 6 of the recovery branch pipe 4 is quickly activated by the liquid pressure supplied by the liquid supply branch pipe 2, and unlike the conventional method, the dispersion pipe 3 is filled with liquid and the liquid pressure is increased. Without waiting for the liquid to rise, it will immediately close automatically due to the hydraulic pressure of the chemical liquid fed from the liquid feeding branch pipe 2.

That is, the automatic valve 6 operates sharply and reliably by hydraulic pressure, thereby eliminating unnecessary leakage of the spray liquid, and making it easy to design or adjust its spring, etc.

[Brief explanation of drawings]

FIG. 1 shows a conventional agricultural chemical spraying device. FIG. 2A-9 is a longitudinal side view showing the operation of the automatic valve used therein, and FIG. 3 shows the device of the present invention. FIG. 4 is an explanatory diagram of the piping angles of the dispersion branch pipe, the dispersion pipe, and the recovery pipe. 1...Liquid feeding pipe, 2...Liquid feeding branch pipe, 3.
...Scatter pipe, 4...Collection branch pipe, 6...
...Automatic valve, 7...Recovery pipe, m...
Branch point, α, β...Branch interior angle.

Claims (1)

[Scope of utility model registration request] A liquid sending pipe 1 and a collection pipe 7 are arranged side by side, a liquid sending branch pipe 2 is branched from the liquid sending pipe 1, an on-off valve 5 is provided on the branch pipe, and the liquid sending branch pipe 2 is connected to a dispersing pipe 3 and a collecting branch pipe 4. The end of the collection branch pipe 4 is a piping device connected to the collection pipe 7, and the liquid supply branch pipe 2 is connected to the collection pipe 7.
The internal branch angle α of the dispersion pipe 3 and the internal branch angle β of the recovery branch pipe 4 are shaped to become the internal branch angle 02 of the dispersion pipe 3 and the internal branch angle β of the recovery branch pipe 4. A residual liquid collection piping device in an agricultural chemical spraying device equipped with an operating automatic valve 6.