JP3365597B2 - On-off valve device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve device for supplying and stopping water from a water source, for example, an irrigation canal, a reservoir, or an irrigation pipe to a water-supplied part such as a paddy field.

[0002]

2. Description of the Related Art Water management in paddy fields is properly carried out for a long period of usually 6 months from the time of sowing or transplanting rice to the time of harvesting, depending on the water temperature, temperature, soil temperature, growing stage of rice, etc. Need to be implemented. Therefore, in addition to requiring a long time of management labor, empirical skill is required for proper implementation.

Almost all paddy fields in the world are supplied with water by open channels, and the paddy water is discharged into the open channels. In most paddy fields, the water level difference between the canal and the paddy field is 0. It is less than 0.5 m, and the difference between the rice field water level and the drainage water level is similar.

However, conventionally, there is a water replenisher having a mechanism for activating a diaphragm type water faucet by utilizing the pressure of water, but it works normally when the pipeline connected to the water irrigator is 0.05 kg / cm ² or less. It is a structure that does not. Since it is a diaphragm type faucet, it is difficult to manufacture a large-capacity one required for a large paddy field. Therefore, for example, one to one paddy field requires 3 to 4 units, which increases the installation cost. . Further, there is a water supply device that moves up and down a hose that can supply water even from an open water channel, but there is a drawback that a certain amount of power is required to move up and down a hose port having a required diameter.
In order to avoid this, a method of arranging a large number of small-diameter hoses and reducing the power required for each is also being implemented, but when operating remotely, that number of remote control devices is required, which is uneconomical. Is. Furthermore, there are gates that slide up and down electrically, but relatively large power is required because the gates are pressed against the frame by water pressure. Since most of the paddy fields do not have power lines, the power source must be batteries, and the need for large-capacity batteries poses significant cost and management issues.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an on-off valve device capable of supplying and stopping a relatively large amount of water with a relatively small power.

[0006]

According to the on-off valve device of the present invention, the inlet pipe extending downward from the water surface of the water source, the guide pipe connected to the inlet pipe and extending in the vertical direction, and the lower portion of the guide pipe. An outlet pipe having a seating surface that is connected to and open to, a water tank is provided at a position above the water surface at the upper end of the guide pipe, and a floating cylinder that can move up and down in the guide pipe is provided. An elastic valve body that can be engaged with and disengaged from the seat surface is attached to the lower end of the floating cylinder, and an on-off valve that supplies and shuts off water from the water tank is provided in the floating cylinder. A pump for returning is provided.

Therefore, in the state where there is no water in the floating cylinder, water is flowing to the position of the water surface of the water source in the guide tube, so that the floating cylinder is in the ascending position by the buoyancy and the valve body is seated on the valve seat. I haven't. Therefore, the water of the water source flows out to the water-supplied part through the inlet pipe, the guide pipe and the outlet pipe. When it is desired to close the on-off valve device, the water in the water tank flows into the floating cylinder when the on-off valve is opened. Then, due to the weight, the floating cylinder descends against the buoyancy, the valve body is seated on the seat surface, and as a result, the seat surface of the outlet pipe is closed. Therefore, the water supply is stopped.

Next, when opening the closed on-off valve device, the pump is operated to return the water in the floating cylinder to the water tank. Since the amount of water in the floating cylinder is small, the pump can be a small battery-operated one. When the water in the floating cylinder is pumped up in this way, the floating cylinder rises due to buoyancy, the valve body separates from the valve seat, and the water flows to the outlet pipe.

Further, if the valve body is spherical and a sufficient buoyant force such as air is contained in the valve body, and the valve body is rotatably held at the lower end of the floating cylinder, foreign matter in water can be prevented from adhering. Furthermore, if the pump and on-off valve are operated remotely, unmanned operation can be achieved.

As described above, according to the present invention, since the floating cylinder is moved up and down by utilizing the buoyancy of water from the water source accumulated in the guide tube, a large amount of water can be supplied and cut off with a small amount of power. You can

[0011]

1 and 2 show an embodiment of the present invention, in which an outlet of an inlet pipe 10 extending below a water surface W1 of a water source is connected to a guide pipe 12 extending in a vertical direction. There is. The lower end of the guide tube 12 communicates with the opening 15 of the outlet tube 14, and a valve seat 16 is provided around the opening 15. The outlet pipe 14 communicates with a not-shown water receiving portion, that is, a rice field.

The upper part of the guide tube 12 forms a water tank 19. A floating cylinder 20 is provided inside the guide tube 12 so as to be vertically movable. A lower end portion 21 of the floating cylinder 20 is closed, and a support portion 23 that rotatably supports an elastic body, for example, a valve body 24 formed in a spherical shape with rubber is provided.

An electromagnetic valve 28, which constitutes an on-off valve, is attached midway in the pipe 26 extending from the lower portion of the water tank 19 to the inside of the floating cylinder 20. A pump 31 is installed inside the floating cylinder 20, and a tube 33 connected to the discharge side of the pump 31 is opened above the water tank 19. The pump 31 may be provided outside the floating cylinder 20.

The operation of the pump 31 and the solenoid valve 28 is controlled by a control board 40 installed at an appropriate position, and the control board 40 receives a signal from a transmitter 41 by an antenna 42 to stop the operation of the pump 31. The solenoid valve 28 is opened and closed. However, it is not always necessary to perform remote control in this way,
You may turn it off.

In operation, the floating cylinder 2 is now
In the position 0 shown in FIG. 1, the water of the water source passes through the inlet pipe 10 and the guide pipe 12, flows from the opening 15 to the outlet pipe 14, and is sent to a rice field, which is a not-shown water-supplying portion.

Then, when the solenoid valve 28 is opened, the water in the water tank 19 falls by its own weight and collects in the floating cylinder 20. Then, the floating cylinder 20, which has been suspended by the buoyancy force due to the water in the guide tube 12 until now, falls due to its gravity, and the lower valve body 24 is seated on the valve seat 16. As a result, the outlet pipe 14 is shut off and water supply is stopped (FIG. 2).

Next, when opening the on-off valve device, the pump 31 is operated to return the water in the floating cylinder 20 to the water tank 19. As a result, the floating cylinder 20 rises due to the buoyancy of the water in the guide pipe 12, and the inlet pipe 10 and the outlet pipe 14 communicate with each other.

The 20 buoyancy of the floating cylinder changes depending on the water level W1 of the water source, but when used in an open channel, the water level is usually almost constant and no special measures are required. Also, when connecting to a pressurized conduit,
By providing a manual valve in the middle of the connecting portion, it is possible to easily control the water pressure to a predetermined level. On the other hand, when used for drainage management, when the water level rises above a predetermined position due to rainfall or the like, the buoyancy of the floating cylinder 20 increases and drainage is automatically performed.

In carrying out the present invention, a small battery (battery), a turbine generator, a solar battery, a wind turbine generator or the like can be used as a power source for operating the pump or the solenoid valve.

As described above, according to the present invention, the floating cylinder 20 is moved up and down by the buoyancy of water in the guide tube 12 and the supply of water in the floating cylinder 20, thereby opening and closing the valve body 24. The power required to open and close the valve body 24 is small, and the valve body 24 can be easily installed even where there is no power line equipment. And automatic control of paddy water level, or
Remote operation management by an appropriate program can be easily performed.

[0021]

According to the present invention, the following excellent effects are exhibited. (1) It can be used regardless of whether the water source is an open canal or a high or low pressure pipe canal, and can also be used as it is for drainage of paddy fields. (2) Since the opening and closing of the valve element is performed by the buoyancy of the floating cylinder and the weight of water supplied, the operating power is small, and the installation cost and management cost are low. (3) Since the upper part of the guide pipe is opened, the water hammer phenomenon that occurs when the valve body is closed does not occur even when it is connected to a waterway pipe, and the corresponding equipment such as a normal pressure regulating water tank is unnecessary. The low-strength pipe can be used, and the equipment cost can be reduced. (4) Automatic control of water level in paddy fields or remote control by appropriate program is possible, and thus soil management can be performed labor-savingly and accurately, and high productivity can be expected.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing when the valve of FIG. 1 is closed.

[Explanation of symbols]

10 ... Inlet pipe 12 ... Guide tube 14 ... Exit pipe 15 ... Opening 16 ... Seat 19 ... water tank 20 ... Floating cylinder 21 ... bottom 23 ... Supporting part 24 ... Valve 31 ... Pump 33 ... tube 40 ... Control panel 41 ... Oscillator

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-224908 (JP, A) Actual development Sho 53-141733 (JP, U) Actual development Sho 57-63168 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F16K 1/00 F16K 31/18 F16K 33/00 E02B 13/02

Claims (3)

(57) [Claims] 1. An inlet pipe extending downward from a water surface of a water source,
A guide pipe connected to the inlet pipe and extending in the vertical direction, and an outlet pipe connected to a lower portion of the guide pipe and having a seating surface opened, and a position of the upper end of the guide pipe above the water surface A water tank is provided in the floating cylinder, a floating cylinder that can move up and down in the guide pipe is provided, and an elastic valve element that can engage with and disengage from the seat surface is attached to the lower end of the floating cylinder, and water is introduced from the water tank into the floating cylinder. An on-off valve device comprising an on-off valve for supplying and shutting off, and a pump for returning water in the floating cylinder to a water tank. 2. The on-off valve device according to claim 1, wherein the elastic valve body is a spherical body rotatably held at a lower end of the floating cylinder. 3. The on-off valve device according to claim 1, wherein the on-off valve and the pump are operated by remote control.