JPH05255918A - Water level adjusting unit foe paddy field - Google Patents

Abstract

PURPOSE:To save labor and optimize the water temperature by providing an opening/closing ring on a float lifted or lowered in response to the water level fluctuation of the paddy field, and automatically opening or closing a conducting tube feeding water from a conduit to the paddy field via the siphon principle with the opening/closing ring. CONSTITUTION:A float 11 formed with a water drop port 15 at the center is liftably inserted into a cylindrical main body l provided with an opening section 13 and a drain port 14 at the upper and lower sections. A slide bar 22 having a projection 21 at the upper end is protruded above the float 11. A cylindrical ring 2 is freely fitted to the bar 22 so that it can be slidably lifted or lowered in the main body 1 to form a water level adjusting unit A. The adjusting unit A is arranged on the paddy field, a conducting tube 12 is connected to a conduit having a higher water level, and water is fed via an siphon action. The float 11 is lifted to close the conducting tube 12 with the ring 2 at the proper water level, and the ring 2 is lowered at a stretch by the projection 21 interlocked with the descent of the float 11 to feed water when the low water level is attained. The reduction of the water temperature over a long period is prevented, and labor can be sharply reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level regulator for paddy fields for maintaining an appropriate water level in a paddy field.

[0002]

2. Description of the Related Art When making rice in a paddy field, it is necessary to always store an appropriate amount of water in the paddy field from the time of rice planting to the growing summer. The water level in this paddy is usually 7 cm to 10 cm.
It is said that the degree is appropriate, and it is said that the growth of rice is not good even if the water level is high or low. For this reason, farmers used to look around the paddy fields in the morning and evening hours and pay attention to the water level in the paddy fields. That is, the paddy field is always 7 cm to 10 c
In order to maintain the water level of m, the weir in the ridge of the paddy field was opened and closed, and it took time to adjust the water level.

[0003]

However, this work is time-consuming and time-consuming, and particularly difficult when the paddy fields are dispersed. Recently, paddy fields were fragmented and dispersed, and the shortage of manpower due to a decrease in the agricultural population was also a problem. And since this maintenance of water level has a great influence directly on the harvest fee and quality of rice, maintenance of water level has been important since ancient times, and for that reason, the early solution of such problems was desired. Is. Further, in order to maintain the water level of the paddy field as described above, for example, when the water level is decreased and water is injected, if water is gradually injected from the headrace, the water temperature near the water inlet will drop over a long period of time, It was recognized that it hindered the growth of rice. For that purpose, it is desirable to inject water all at once when the water level drops to prevent the water temperature from dropping for a long time and maintain an appropriate water level.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and solves the problems. The water level adjuster according to the present invention is installed in a ridge of a paddy field, is connected to a headrace channel flowing around the paddy field, and automatically adjusts the water level of the paddy field using the siphon principle.

[0005]

[Operation] A float that moves up and down according to the water level of the paddy field is installed inside, and an opening / closing ring is placed on the float.
This is a water level controller for paddy fields, which is characterized by connecting a water pipe and a water channel of a paddy field and utilizing the siphon principle.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the accompanying drawings. FIG. 1 is a vertical cross-sectional view of a water level adjuster A according to the present invention. An opening 13 is provided in the upper part, a drain port 14 is provided in the lower part, and the float 11 is provided inside the tubular main body 1.
The float 11 slides up and down along the inner wall of the main body 1 depending on the water level of the paddy field. The float 11
Is formed by molding with a lightweight synthetic resin or the like such as styrofoam, and is provided with a water drop port 15 at the center so that the water flowing from the upper port drops down as described later. A slide rod 22 is erected on the upper surface of the float 11, the cylindrical ring 2 is arranged on the slide rod 22, and a protrusion 21 is formed on the upper end. The cylindrical ring 2 is placed on the float 11 and slidable along the inner wall of the main body 1 like the float, and has a size that closes the water inlet of the water conduit 12. ..

The water level adjuster A may be formed of synthetic resin, or may be made of metal or the like, and the material is appropriate, and it is also possible to produce a combination thereof. When used in a paddy field, a flexible tube 3 is connected to a water guiding tube 12 projecting from the side surface of the main body 1, and one end of the tube 3 is connected to a water guiding channel B having a higher water level, which flows around the paddy field. Inserted and connected.
At the beginning of installation, remove the air from tube 2 before setting
Water is sucked by a degassing pump (not shown) to flow according to the siphon principle. FIG. 2 shows a side view when the pad is actually installed in the paddy field, but when the water flows from the headrace channel B into the paddy field. That is, the water level C of the paddy field is lower than the appropriate water level, and the water level adjuster A is the pedestal 4 that is previously installed in the paddy field.
It will be installed at the height and its height will be adjusted so that water will flow in at an appropriate water level. At the beginning, the float 11 descends, so that the water from the headrace B flows into the inside of the water level controller A by the principle of the siphon, and is supplied to the paddy field through the outlet 15 and the drain 14 of the float 11. It

FIGS. 3 to 5 show the positional relationship of each part according to the water level in the paddy field. FIG. 3 shows a case where there is sufficient water in the paddy field, the float 11 is above, and the tubular ring 2 placed on top of the float 11 blocks the water inlet of the water conduit 12 so Does not flow. FIG. 4 shows a state in which the water level in the paddy field is gradually decreasing, and the float 11 is located below, but the tubular ring 2 is poured by the water pressure (not shown) inside the water conduit 12. Slide rod 2 that is connected to the float 11 but remains at the position where the water port is blocked
2 and the protrusion 21 are descending downward. Figure 5
Although the water level in the paddy field is sufficiently lowered, the float 11 is lowered to a sufficiently lower level, the projection 21 connected to the upper portion causes the tubular ring 2 to drop at once, and water flows in from the headrace channel. Come on. One of the features of the present invention is that the protrusion 21 of the slide rod, in which the tubular ring 2 is erected on the float 11 when the water level is sufficiently lowered,
It became possible to inject water in a short time. Since the water level can be quickly raised in the paddy field in this way, the float 11 slides upward, and at the same time, the tubular ring 2 closes the water inlet of the water conduit, returning to the state shown in FIG. 3 and injecting water into the paddy field. Is over.

Further, with such a structure, when the water level abnormally increases due to a typhoon or the like, it is possible to reversely flow the water of the paddy field to the headrace channel. The size of the water level adjuster may be determined by the size of the paddy field to be installed, the position of the headrace, etc.
Various shapes can be considered in addition to this embodiment, but there is no difference in that the function is simple in that the water level is adjusted using the principle of the siphon.

[0010]

As described in detail above, the water level regulator for a paddy field according to the present invention, when the water level in the paddy field becomes low, water is rapidly supplied from the headrace channel and is considered to be appropriate.
It is easy to keep the water level in cm automatically. In particular, it is possible to avoid a long-term drop in water temperature near the water injection port,
The entire surface of the paddy field can create the conditions under which the growth of rice can be expected on average. Moreover, once it is installed, it does not take any trouble after that, and the water level is automatically adjusted, which greatly reduces the labor and is very effective. Further, because of its simple structure, it is suitable for mass production, can be provided at a low cost, and does not use any special power, so that it can be used semipermanently, and various advantages are conceivable.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a water level adjuster according to the present invention.

FIG. 2 is a cross-sectional view when a water level adjuster is installed in a paddy field.

FIG. 3 is a cross-sectional view showing a state in which a water level adjuster is installed in a paddy field and water in the paddy field is in an appropriate position.

FIG. 4 is a cross-sectional view of a state where a water level adjuster is installed in a paddy field and the water in the paddy field gradually decreases.

FIG. 5 is a cross-sectional view showing a state in which a water level adjuster is installed in a paddy field and the water level in the paddy field is sufficiently lowered.

[Explanation of symbols]

A ... Water level adjuster B ... Headrace channel C ... Water surface 1 ...
Main body 11 ... Float 12 ... Water conduit 13 ... Opening
14 ... Drainage port 15 ... Drainage port 2 ... Cylindrical ring 21 ... Projection
22 ・ ・ Slide bar 3 ・ ・ Tube 4 ・ ・ Pedestal

Claims (1)

[Claims] 1. A float, which moves up and down depending on the water level of a paddy field, is provided inside, has an opening / closing ring mounted on the float, and connects a water pipe and a water channel of a paddy field, and uses the siphon principle. A water level controller for paddy fields.