JP2000166403A - Water level setting apparatus for paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water level setting apparatus for a paddy field, capable of preventing a ball tap valve from sensitively opening and closing by a ripple on a water surface and surely operating the ball tap valve and an automatic water tap. SOLUTION: A ball tap valve 5 is housed in a cylindrical body 6 equipped with a water hole 61 communicating with a cultivation area 1. A wave eliminating plate 62 for preventing the transmission of a ripple on a water surface of the cultivation area 1 to a float 51 of the ball tap valve 5 is installed in the vicinity of the water hole 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level setting device for a paddy field, and more particularly, to a water tap in a cultivated area by automatically opening and closing a water tap with a ball tap valve that opens and closes according to a change in the water level. The present invention relates to a water level setting device for a paddy field that maintains a predetermined water level.

[0002]

2. Description of the Related Art As a means for maintaining a water level in a paddy field, for example, an automatic irrigation method described in Japanese Patent Application Laid-Open No. 2-47415 is known. This method combines an automatic hydrant composed of a diaphragm valve and a pilot valve composed of a ball tap valve, and when the water level in the cultivated area drops and the ball tap valve opens, the automatic hydrant is opened and water is supplied into the cultivated area. When the inside of the cultivation area reaches the set water level and the ball tap valve closes, the automatic water tap is also closed to stop the supply of water.

[0003]

However, when the automatic tap is opened and closed by using the ball tap valve as described above, the water level in the cultivated area is affected by the flow of water from the automatic tap,
When the wind undulates, the wave causes the float to move up and down, causing the ball tap valve to open and close finely, and the automatic hydrant sometimes repeats the opening and closing operation frequently. For this reason, excess water is supplied to the cultivation area and is not only wastefully discharged, but also the automatic water tap and the ball tap valve may be damaged by frequent opening and closing operations.

Accordingly, the present invention prevents the ball tap valve for opening and closing the automatic water tap from being finely opened and closed due to the ripple of the water surface, and can reliably operate the ball tap valve and the automatic water tap. It is intended to provide a setting device.

[0005]

To achieve the above object, a water level setting device for a paddy field according to the present invention comprises an automatic water tap connected to a water supply pipe and a ball tap valve connected to a pilot pipe of the automatic water tap. In the paddy field water level setting device provided, the ball tap valve is housed in a cylinder provided with a water inlet communicating with the cultivation area, and near the water inlet, the ripple of the water surface of the cultivation area causes the float of the ball tap valve to float. It is characterized in that a wave canceling plate for preventing transmission is provided.

In the paddy field water level setting device of the present invention, the water passage is formed in a vertical slit shape, and the wave plate is formed along the water passage so that the vertical position thereof can be adjusted. It is characterized in that the ball tap valve is mounted on a corrugated plate, and that a scale and an index for setting a water level of a cultivated area are provided on the water inlet and the wave-dissipating plate.

[0007]

1 to 4 show an embodiment of a water level setting device for a paddy field according to the present invention. FIG. 1 is a longitudinal sectional view of the water level setting device, and FIG. 2 accommodates a ball tap valve. FIG. 3 is a plan view of the cylinder body, FIG. 3 is a front view of the ball tap valve storage cylinder seen from the water inlet side, and FIG. 4 is a cross-sectional view of a cultivated area showing an example of installation of a water level setting device.

A water level setting device 2 installed in each cultivation zone 1 of a paddy field includes an automatic water tap 3 connected to a water supply pipe 11, a ball tap valve 5 connected to a pilot pipe 4 of the automatic water tap 3, It is formed by a cylindrical body (ball tap storage cylinder) 6 that stores the ball tap valve 5.

The automatic water tap 3 is provided with a valve seat 3 provided at an upper end of a vertical pipe 30 connected to the water supply pipe 11.
1, a diaphragm valve 33 provided inside the cover 32 provided to cover the upper part of the pipe 30 so as to open and close the valve seat 31, and a pressure formed between the diaphragm valve 33 and the cover 32. An intake pipe 35 connecting the inside of the chamber 34 and the pipe 30, the pilot pipe 4 connecting the inside of the pressure chamber 34 and the ball tap valve 5,
An adjusting screw 36 for regulating the maximum opening of the diaphragm valve 33 and an auxiliary valve 3 for shutting off the pilot pipe 4
7 and an intake valve 3 for extracting water from the intake pipe 35
8, wherein an outflow portion 39 is provided between an upper outer periphery of the pipe 30 and a lower inner periphery of the cover 32.

As is well known, the ball tap valve 5 opens and closes a valve element 53 in a valve box 52 by the movement of a float 51 which moves up and down in response to a change in water level. The mounting height is determined so that the valve opens when the water level falls below the set water level and closes when the water level exceeds the set water level.

When the water level in the cultivation area 1 drops and the ball tap valve 5 opens, and the water (pilot water) in the pressure chamber 34 flows out of the pilot pipe 4, Is released to the atmosphere via the pilot pipe 4, the pressure below the diaphragm valve 33, that is, the pressure of the water supplied from the water supply pipe 11 to the pipe 30, pushes up the diaphragm valve 33, and the valve seat 31 is opened and the water flows out from the outflow portion 39, and the water is supplied to the cultivation area 1.

When the inside of the cultivation area 1 reaches the set water level and the ball tap valve 5 closes and the outflow of the pilot water from the pilot pipe 4 stops, the water flowing into the pressure chamber 34 through the intake pipe 35 causes the water to flow. The pressure in the pressure chamber 34 gradually increases, and the pressure acting on the upper and lower surfaces of the diaphragm valve 33 becomes relatively higher on the pressure chamber 34 side due to the difference in area between the two. The outlet is closed, and the outflow of the water from the outlet 39 stops. In addition,
In order to perform this closing operation reliably and quickly, the pressure chamber 3
A spring for urging the diaphragm valve 33 in the closing direction can be provided in the inside 4.

Therefore, the automatic water tap 3 opens and closes in conjunction with the opening and closing of the ball tap valve 5 which operates according to a change in the water level in the cultivation area 1, and the supply and stop of the water is performed automatically.

The automatic water faucet 3 having the above-described structure is configured such that the amount of water flowing out of the automatic water faucet 3 when the valve is opened is controlled by the adjusting screw 3.
6 by regulating the upper limit of the diaphragm valve 33. Further, by removing the pilot pipe 4 and opening and closing the auxiliary valve 37, the automatic water tap 3 can be opened and closed manually. Further, the intake valve 38
By connecting a hose to the valve and opening the water intake valve, water can be supplied to an arbitrary position via the hose.

A cylindrical body 6 containing the ball tap valve 5
Consists of a square cylinder or a cylinder of an appropriate size installed in the cultivation area 1 with the axis line extending in the vertical direction, and the side wall thereof has a vertical slit shape communicating with the cultivation area 1. Is formed.

Between the water inlet 61 and the float 51 of the ball tap valve 5, there is provided a wave canceling plate 62 for preventing the waving of the water surface of the cultivated area 1 from being transmitted to the float 51. The plate 62 and the ball tap valve 5 are connected to the cylindrical body 6 from the valve box 52 of the ball tap valve 5 through the water inlet 61.
And is integrally supported by a sleeve of a threaded rod 54 screwed into the wing nut 53.

That is, by loosening the wing nut 53, the screw rod 54 can be moved up and down along the water inlet 61. By tightening the wing nut 53 at an appropriate position, the wave canceling plate 62 and The ball tap valve 5 is formed so that it can be fixed.

The wave-absorbing plate 62 does not hinder the passage of water between the cultivated area 1 and the inside of the cylindrical body 6, and the waving of the water surface of the cultivated area 1 causes the cylindrical body 6.
Any shape, such as a flat plate shape and a curved shape, can be formed as long as the shape does not directly penetrate the inside. For example, when the slit width of the water inlet 61 is about 10 mm, the width is 50 mm.
A flat plate or a gently curved plate can be used, and the upper end of the wave-absorbing plate 62 may be positioned 50 mm or more above the set water level, and the lower end is 1 mm above the water surface.
What is necessary is just to be located lower than 00 mm.

By providing such a wave-absorbing plate 62 between the water inlet 61 and the float 51, the wind and the automatic hydrant 3
The waves generated by the flow of the water from the water can be prevented from directly entering the cylindrical body 6. Therefore, the float 51 moves up and down due to the waving of the water surface of the cultivation area 1, and the ball tap valve 5 does not open and close finely, and hunting or the like does not occur and the automatic water tap 3 does not malfunction. As a result, there is no needless supply of water, and the valve is not damaged by frequent fine opening and closing operations.

Further, on the outer surface side of the wave canceling plate 62, a horizontal index portion 63 is provided. This indicator 63
The outer surface of the cylindrical body 6 is provided corresponding to the scale 64 provided on the side of the water inlet 61, and by checking the position of the indicator 63 with respect to the scale 64, the vertical position of the ball tap valve 5 is determined. That is, the set water level can be easily and reliably set in units of "cm".

That is, according to the water level setting device shown in the present embodiment, not only the malfunction of the ball tap valve 5 due to the wave of the cultivation area 1 can be prevented, but also the water level can be easily set. It should be noted that the ball tap valve 5 and the wave canceling plate 62 can be separately mounted in the cylindrical body 6.
May be fixed to the cylindrical body 6. Further, a plurality of wave canceling plates 62 can be provided, and horizontal wave breaking blades can be provided. Further, the shape of the cylindrical body 6 and the shape of the water passage 61 are also arbitrary, and the number of the water passages 61 is also arbitrary. Also,
The details of the structure of the automatic water tap 3 and the ball tap valve 5 are also arbitrary, and an automatic water tap and a ball tap valve having a known structure can be used.

[0022]

As described above, according to the water level setting device for a paddy field of the present invention, it is possible to prevent the ball tap valve from malfunctioning due to the waving of the water surface of the cultivated area, thereby preventing waste of water and damage to the valve. Water management can be performed reliably while doing so.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a water level setting device for a paddy field according to the present invention.

FIG. 2 is a plan view of a cylinder housing a ball tap valve.

FIG. 3 is a front view of the cylinder as viewed from a water inlet side.

FIG. 4 is a cross-sectional view of a cultivation area showing an installation example of a water level setting device.

[Explanation of symbols]

1 ... Cultivation area, 2 ... Water level setting device, 3 ... Automatic water tap, 4 ...
Pilot piping, 5: Ball tap valve, 6: Cylindrical body, 11
... water supply pipe, 30 ... pipe, 31 ... valve seat, 32 ... cover, 33 ... diaphragm valve, 34 ... pressure chamber, 35 ... intake pipe, 36 ... adjustment screw, 37 ... auxiliary valve, 38 ... intake valve, 3
9: Outflow part, 51: Float, 52: Valve box part, 53: Wing nut, 54: Screw rod, 61: Water inlet, 62: Wave-dissipating plate,
63: indicator, 64: scale

Claims (3)

[Claims] 1. A water level setting device for a paddy field comprising an automatic water tap connected to a water supply pipe and a ball tap valve connected to a pilot pipe of the automatic water tap, a cylinder provided with a water inlet communicating with a cultivation area. A water level in a paddy field, wherein the ball tap valve is housed in a body and a wave-dissipating plate is provided in the vicinity of the water inlet so as to prevent ripples on the water surface of the cultivated area from being transmitted to the float of the ball tap valve. Setting device. 2. The water-flow opening is formed in a vertical slit shape, and the wave-absorbing plate is formed so as to be vertically adjustable along the water-flow opening, and the ball tap valve is mounted on the wave-absorbing plate. The water level setting device for a paddy field according to claim 1, wherein: 3. The water level setting device for a paddy field according to claim 2, wherein a scale and an index for setting a water level of the cultivated area are provided on the water passage portion and the wave breaking plate.