JPH02194210A - Irrigation water control device - Google Patents

Abstract

PURPOSE:To prevent poor supply of water into a supplied part of irrigation water by providing a changeable float so as to change the opening force of an opening/closing valve. CONSTITUTION:Flowing water in a flume 44 flows from the water outlet 47 of a communicating pipe 42, and flows in a main body 31 through a pipe 45 and a water intake 32. Nextly, a float 34 is pushed up, an opening/closing port 33 is opened, and the water flows in a paddy field 43. Nextly, when the water level 48 of the paddy field 43 becomes at a prescribed height, the main valve 35 of an opening/closing valve closes the port 33. When the opening force of the opening/closing valve will be changed, subsidiary floats 34 are detachably fitted on the both sides of the float 34 with fasteners 50, according to the case.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an irrigation control device.

[Conventional technology]

Figure 4 shows a system that automatically supplies and stops water from an irrigation canal to a rice field without manual intervention, so that the amount of water in the rice field can always be maintained at a constant level, and at the same time prevent water wastage. It is raining on one of the irrigation control devices.

This device includes a main body 1 which has a space inside and is embedded in a paddy field 13. The main body 1 has two openings: a water intake port 2 facing laterally and an opening/closing port 3 facing upward. A float 4 is located above the main body 1, and an on-off valve is arranged in the internal space of the main body 1. The float 4 floats on a water surface 18 in a paddy field 13, which is an area to be irrigated, and can move up and down in accordance with fluctuations in the water level. The float 4 has a spherical shape, and a movable shaft 7 having the auxiliary valve 6 at the lower end is inserted into the center thereof. It is now possible to do so. The float 4 can be vertically raised and lowered in a fixed position by being guided by a guide pin 10.10 on the outer periphery and a guide 11.11 protruding from the upper surface of the main body 1.
and an auxiliary valve 6, and the main valve 5 has drain holes 9 and is provided so as to simply rest on the auxiliary valve 6. The water level 16 in the irrigation canal 14 is high, and between one end of the pipe passed from the side of the irrigation canal 14 to the rice field 13 side and the water intake port 2 of the main body 1, there is an elbow or a straight pipe. A pipe 15 is connected thereto. The water flowing through the irrigation canal 14 flows through the communication pipe 1 due to the height difference between the water level 16 and the main body 1.
The float 4 is pushed upward by the buoyant force of the water in the main body l that flows out of the water outlet 17 which is one end of the main body l through the pipe 15 and flows into the main body l from the water intake port 2, and the opening/closing port 3 opens. Water from this opening/closing port 3 flows into the rice field 13.

Since the float 4 and the auxiliary valve 6 are fixed to the movable shaft 7, the auxiliary valve 6 also rises as the float 4 rises. Since the main valve 5 is also supported by the auxiliary valve 6, it rises in conjunction with the rise of the float 4. When the water level 1B of the paddy field 13 reaches a predetermined height, the on-off valve 3 is closed from below, and the supply of water to the paddy field 13 is stopped. The setting of the water level 18 in the paddy field 13 can be changed by selecting the fixing position to the movable shaft 7 by the coupling means 8. That is, by adjusting the distance between the lower surface of the float 4 and the upper surface of the main valve 5, a predetermined water level can be set. From this state, the water level of rice field 13 is 18
When the float 4 goes down, the auxiliary valve 6 also goes down in conjunction with the float 4. However, the main valve 5 does not descend immediately. This is due to the water pressure of the water flowing from below the main valve 5. The water drain hole 9 functions to reduce this water pressure. When the auxiliary valve 6 descends, water flows out from between the auxiliary valve 6 and the main valve 5 through the drain hole 9 to the upper surface of the main valve 5.

As a result, the upward water pressure acting on the main valve 5 is reduced, and the main valve 5 is lowered by its own weight and the downward force of the float 4. When the main valve 5 is lowered, the opening/closing port 3 opens again, and the water that has passed through the main body I flows into the paddy pipe 3.

[Problem to be solved by the invention]

By the way, since the float 4 of the irrigation control device has a constant diameter and is used in each device and is used as is without any changes, the irrigation canal 14
When the difference between the water levels 61°18 and 13 is small, the water pressure applied to the on-off valve 5.6 is not too large and the float 4
The downward force of 61 will overcome this, but both water levels
．． When the height between the valves 18 and 18 is large, the water pressure applied to the on-off valves becomes so large that the same float 4 may not be able to push down the on-off valves 5 and 6. As a result, malfunction may occur,
The amount of water supplied to the rice fields 13 may be insufficient.

In view of the above-mentioned circumstances, it is an object of the present invention to prevent insufficient water supply to the irrigated area due to malfunction.

[Means to solve the problem]

In order to solve the above problems, the irrigation control device according to the present invention has a space inside, a water intake port to which a pipe for guiding water from a water source is connected, and an opening/closing device that opens above the internal space. A main body having two mouths, a float located above the main body that floats on the water surface in the water area and can move up and down following fluctuations in the water level, and a float located within the main body. In the irrigation control device, the irrigation control device is equipped with an on-off valve that is raised and lowered in conjunction with the float to open and close the opening/closing port, and the float is configured such that the opening force of the on-off valve is different in magnitude. It is now possible to change it to .

[For production]

If the float can be changed so that the opening force of the opening/closing valve is different in magnitude, when the float is made large, the pushing down force is strong, and when the float is made small, the pushing down force is small, for example. Even when the water level difference between the water source and the area to be irrigated becomes large and a large water pressure is applied to the on-off valve, the valve can be opened reliably.

〔Example〕

Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the irrigation control device according to the present invention. As you can see in these figures, this irrigation control device has a space inside and can be used for 4 paddy fields.
The main body 31 is embedded in the main body 3. Same body 31
is made of plastic or metal material, etc., and this main body 31 has a water intake port 32 facing to the side and an opening/closing port 3 facing upward.
The two mouths of 3 are open. A float 34 is located above the main body 31, and an on-off valve is arranged in the internal space of the main body 31. The float 34 floats on a water surface 48 in a paddy field 43, which is an area to be irrigated, and can move up and down in accordance with fluctuations in the water level. This float 3
At the center of 4 is a movable shaft 3 equipped with the auxiliary valve 36 at the lower end.
7 is inserted. The movable shaft 37 is adapted to be able to adjust its mounting position relative to the float 34 in three days using the coupling means. The float 34 has two holes that protrude from the main body 34 into through holes 34a, 34a that are formed at two places in the float 34.
Book guides 41, 41 are inserted and slid so that they can be raised and lowered vertically in a fixed position. The on-off valve consists of a main valve 35 and an auxiliary valve 36, and the main valve 35 has a drain hole 3.
9..., and are provided so as to simply rest on the auxiliary valve 36. The water flowing through the irrigation channel 44 flows out from the water outlet 47 which is one end of the communication pipe 42 due to the height difference between the water level 46 and the main body 31, passes through the pipe 45, and flows into the main body 31 from the water intake port 32. The float 34 is pushed upward by the buoyancy of the water inside the main body 31, and the opening/closing opening 3
3 opens, and water from this opening/closing port 33 flows into the rice field 43. Since the float 34 and the auxiliary valve 36 are fixed to the movable shaft 37, the auxiliary valve 36 also rises as the float 34 rises. Since the main valve 35 is also supported by the auxiliary valve 36, it rises in conjunction with the rise of the float 34. When the water level 48 in the paddy field 43 reaches a predetermined height, the on-off valve 33 is closed from below, and the supply of water to the paddy field 43 is stopped. The water level 48 of the paddy field 43 is set by the movable shaft 3 by the coupling means 38.
This can be changed by selecting the fixed position to 7.

That is, by adjusting the distance between the lower surface of the float 34 and the upper surface of the main valve 35, a predetermined water level can be set. When the water level 48 of the paddy field 43 falls from this state, the float 34 descends and the auxiliary valve 36 also moves to the float 34.
It descends in conjunction with. However, the main valve 35 does not descend immediately. This is due to the water pressure of the water flowing from below the main valve 35. The water drain hole 39 functions to reduce this water pressure. When the auxiliary valve 36 descends, the auxiliary valve 36 and the main valve 35
The water flows out from between the drain holes 39 to the upper surface of the main valve 35. As a result, the water pressure pushing up the main valve 35 is reduced,
The main valve 35 is lowered by its own weight and the pressure of the float 34 . By lowering the main valve 35, the opening/closing port 33 opens again, and water flows into the paddy field 43.

By the way, the float 34 is a basic float, and on both sides of the basic float 34 there are small auxiliary flows) 34.
', 34' can be detachably attached to the same level using a plurality of fasteners 50...

This is so that the opening force (pushing force) of the on-off valve can be changed. Note that the mouth portion 3 of the water intake port 32
2a is provided above the main body 31 so as to be integrated with the isometric body 31 and protrude slightly longer. The pipe 45 connecting the mouth 32a of the water intake port 32 and one end of the communication pipe 42 is a single pipe made of a metal pipe, a solid resin pipe, or a film-like pipe. If the mouth portion 32a of the water intake port 32 is provided above the main body so as to be integrated with the main body, it becomes easier to connect the pipe to the water intake port,
To easily and efficiently connect a water source to a main body. A rising portion 51 integral with the main body 31 is provided at the upper part of the main body so as to surround the opening/closing opening 33 when viewed from above the main body 31. The rising part 51 is a rice field 43
It comes to stand up from the surface of. A net-like fence 52, which is rectangular when viewed from above, protrudes from the top of the rising portion 51. This fence 52 also constitutes the foreign matter removal means as an auxiliary rising portion. This removing means eliminates clogging of foreign matter such as dirt and dust between the opening/closing valve and the opening/closing opening, thereby ensuring reliable opening/closing operation. This prevents the on-off valve from malfunctioning. As described above, in the irrigation control device according to the present invention, a filter 53 is removably provided inside one end of the communication pipe 42 on the irrigation channel 44 side. Since it is possible to change the float so that the float is larger, the push-down force will be stronger, and if it is smaller, the push-down force will be smaller.
Thereby, for example, even if the water level difference between the water source and the area to be irrigated becomes large and a large water pressure is applied to the on-off valve, the valve can be opened reliably. As a result, if the water level in the area to be irrigated drops, it can be raised again without malfunction.

Note that the float may not be of the type that adds an auxiliary float, but may be one in which floats of different sizes are prepared and used appropriately depending on the water level difference.

〔Effect of the invention〕

Since the irrigation control device according to the present invention is configured as described above, insufficient supply of water to the area to be irrigated will not occur due to malfunction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the irrigation control device according to the present invention, and FIG. 2 is a plan view of the same float.
FIG. 3 is a perspective view of a fence, and FIG. 4 is a cross-sectional view of an example of a conventional irrigation control device. 31...Body 32...Water intake 33...Opening/closing port 34.34"...Float 43...Paddy field (irrigated area) 44...Irrigation canal (water source) 45...Pipe 4
6...Water level of irrigation canals 48...Water level of rice fields Agent Patent attorney Takehiko Matsumoto

Claims (1)

[Claims] 1. A main body with a space inside and two openings: a water intake port to which a pipe for introducing water from a water source is connected, and an opening/closing port that opens above the internal space, and a main body located above the main body. a float that floats on the water surface in the irrigated area and can move up and down following fluctuations in the water level; and a float that is located inside the main body and that moves up and down in conjunction with the float to open and close the opening/closing port. An irrigation control device equipped with an on-off valve, characterized in that the float can change the opening force of the on-off valve to vary in magnitude. .