JPH0156208B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides for, in cultivated land where a bullet culvert has been constructed and underground cultivation has been formed, a wooded culvert that is connected to the bullet culvert and deeper than the bullet culvert connected to a branch waterway. is connected to a reservoir or main waterway, a water control door is installed between the branch waterway and the reservoir or main waterway, a pump is provided for adjusting the water level of the branch waterway, and a water control door is installed on the top of the main body of the water control door. This invention relates to a drainage and flooding device equipped with a small door or an upper door for water level adjustment.

By opening the upper edge of the small door or double door at the same level as the appropriate water level according to the crop growth of the cultivated land where underground cultivation has been carried out, the excess amount of water or showers pumped into the branch canal by the pump, Abnormal amounts of water that exceed the set level due to heavy rain, etc. overflow from the upper edge of the small door or upper door and are discharged into the main waterway, so even during a power outage, the water level will not rise more than necessary and cause damage to crops. The purpose is to carry out water management according to the settings.

The present invention will be described with reference to the embodiment shown in the drawings.A branch waterway 4 is connected to a reservoir or main waterway 5 by an open channel 8 or an underdrain (not shown) as shown in FIG. A water control door 6 is provided between both waterways 4 and 5 at this connection part, and a submersible pump 7 is provided at the lower front of the water control door 6.
Three-way valves 11 and 12 are provided in the discharge pipe 9 and suction pipe 10 of the same pump 7, and these three-way valves 11 and 1
A through hole 1 with one end of 2 bored at the bottom of the water control door 6
3 and 14 to form a pump 7 for adjusting the water level of the branch waterway 4. A cultivated land 2 which has been tilled underground is provided adjacent to the branch waterway 4 thus constructed. That is, a plurality of rows of bullet culverts 1 are formed at appropriate depths and at appropriate intervals in the cultivated land 2 (Patent No.
No. 797480, Special Publication No. 50-10203). Also, a timbered culvert 3 is formed which intersects (perpendicularly intersects with) the plurality of rows of bullet culverts 1 thus making the two culverts 1 and 3 communicate with each other. As shown in Figure 2, the timbered culvert 3 is a groove deeper than the bullet culvert 1 that intersects with it, and the hydrophobic material such as paddy is filled to a higher level than the bullet culvert 1, and the bottom is provided with a hole for water passage. Pipe 3a is arranged and paddy grain 3b
The ground surface 15 is formed by filling and backfilling soil 3c, and the perforated water pipe 3a is opened to the branch waterway 4.
In addition, 16 in Figure 3 is a ridge or farm road, 17 in Figure 4 is a lifting device for the water control door 6, and 18 is a three-way valve 1.
1 and 12 opening/closing devices. Small door 6a for water level adjustment
The upper door 6b is provided on the upper part of the main body of the water control door 6, and is raised and lowered by the lifting device 17 of the water control door 6.

Therefore, when it is necessary to irrigate or flood the ground surface 15, the water control door 6 between the two waterways 4 and 5 is closed, the pump 7 is operated, and the water is pumped and injected into the branch waterway 4 to adjust the water level. I can do it. That is, the pump 7 is operated as described above to transfer water from the main waterway 5 to the branch waterway 4 through the timbered culvert 3 and the bullet culvert 1 to raise the water level to an appropriate water level in the upper part of the ground and on the surface of the cultivated land 2 by permeation. The cultivated land 2 can be irrigated or flooded underground by supplying water to the branch canal 4 and storing the water at the same water level as the appropriate water level in the upper part of the cultivated land. Conversely, the pump 7 is operated to discharge the water in the branch canal 4 to the main canal 5, lowering the water level in the branch canal 4, passing through the timbered culvert 3 and the bullet culvert 1, and lowering the water level to drain the cultivated land 2. can be done. This automatic control of the soil moisture in the cultivated land 2 is achieved by detecting the humidity in the cultivated land, using a timer and water level detectors for each of the main and branch waterways 4 and 5, electrifying the water control door, and controlling the operation of the pump 7 by electrifying the valves. This can be done by automatic control. In addition, in the event of abnormal rainfall, as shown in Figure 9, there is a risk that the top surface of the cultivated land 2 will be flooded for a long period of time, so when the water level of the main waterway 5 is low, the water control door 6 should be opened. By draining water from the branch waterway 4 and lowering the water level, flooding of the cultivated land 2 can be prevented. Also, when the water level of the main waterway 5 is the same as or below the water level of the branch waterway 4, if the cultivated land 2 is flooded or the soil moisture is excessive, the water control door 6 is closed and the pump 7 is operated to operate the main waterway 5. The water level in the branch waterway 4 can be lowered by draining water into the water. Small door for water level adjustment 6
a or the upper edge level of the upper door 6b is maintained at a set water level by the lifting device 17, and the above-mentioned excess water amount or shower
If the amount of water exceeds the setting due to heavy rain, etc., the small door 6a will be closed.
Alternatively, it overflows from the upper edge of the upper door 6b and is discharged into the main waterway 5. Even if the pump 7 stops due to a power outage when the pump 7 is discharging water into the main waterway 5, the position of the small door 6a or the double door 6b is adjusted as shown in FIG. 8, and the water overflows from its upper edge. It is something that can be done.

It is stated in the above-mentioned Japanese Patent Publication No. 10203-1983 that the method of cultivating crops using the above-mentioned underground tilled land 2 (i.e. underground tillage, surface no-tillage, furrow and row sowing land) is superior. There is, but the drainage,
Controlling flooding was extremely difficult.

The present invention has been made in view of the above-mentioned circumstances, and in the cultivated land 2 where the bullet culvert 1 has been constructed and underground cultivation has been formed as described above, the bullet culvert 1 is connected to the cultivated land 2 and the bullet culvert 1 is connected to the bullet culvert 1. A deep timber culvert 3 is connected to a branch waterway 4, the branch waterway 4 is connected to a reservoir or main waterway 5, a water control door 6 is provided between the branch waterway 4 and the reservoir or main waterway 5, and the branch waterway 4 Since the pump 7 for water level adjustment is provided, and the small door 6a or the upper door 6b for water level adjustment is provided above the water control door 6, the above-mentioned operations can be carried out very easily by operating the pump 7. Drainage and flooding can be adjusted in the cultivated land 2 where underground cultivation has been carried out, and the water level adjustment small door 6a or upper door 6b can be adjusted and maintained at a set water level to prevent abnormal water levels caused by showers or heavy rain. It has the effect of managing water as set and adjusting abnormal water levels using the small door 6a or the upper door 6b during a power outage.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a drainage and flooding device for cultivated land that has undergone underground tillage according to the present invention, Fig. 2 is a vertical cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is Fig. 1 B-B.
4 is a front view of the water level adjustment pump, FIG. 5 is a cross-sectional view taken along line C-C in FIG. 4, and FIG. 6 is a front view of another embodiment of FIG. 4. 7th
The figures are a cross-sectional view taken along the line D--D in FIG. 6, FIG. 8 is a side view of the set water level maintained state, and FIG. 9 is a side view of the submerged and drained state. 1... Bullet culvert, 2... Arable land, 3... Timber culvert, 4... Branch waterway, 5... Main waterway, 6... Water control door, 7... Water level adjustment pump, 6a... Water level adjustment Small door, 6b...Upper door for water level adjustment.

Claims (1)

[Claims] 1 In the cultivated land 2 where the bullet culvert 1 has been constructed and underground cultivation has been formed, a wooded culvert 3 that is connected to the bullet culvert 1 and deeper than the bullet culvert 1 is connected to the branch waterway 4, and the branch waterway 4 is used as a reservoir. Or connected to the main waterway 5, provided with a water control door 6 between the branch waterway 4 and the reservoir or the main waterway 5, and provided with a pump 7 for adjusting the water level of the branch waterway 4, and the main body of the water control door 6. A drainage and flooding device provided with a small water level adjustment door 6a or a water level adjustment upper door 6b at the top.