Paddy-field drainage-flow adjustment device

Abstract

To provide a versatile paddy-field drainage-flow adjustment device that can be retrofitted directly onto an upward-facing drainage outlet of a paddy field and can adjust the drainage flow rate.SOLUTION: The paddy-field drainage-flow adjustment device includes a first three-dimensional forming section 111 that, when attached to a drainage outlet that opens upward in a paddy field, forms two or more load-applying portions 5 on the drainage outlet and forms a drainage passage opening 4. Further, the drainage passage opening 4 may be formed at two or more positions including two end portions of the first three-dimensional forming section 11, and the device can also be configured to include a second three-dimensional forming section 12 positioned inside the drainage outlet.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a paddy field drainage amount adjusting device for adjusting the amount of drainage in paddy fields. [Background technology]

[0002] In recent years, in order to prevent the flooding of waterways and rivers caused by increased rainfall due to global warming, efforts to build "rice paddy dams" have been promoted nationwide. These dams limit the amount of water discharged from rice paddies, temporarily store rainwater in the paddies, and then gradually release it downstream. For this reason, there have conventionally been adjustment tools such as those described in Non-Patent Document 1 below.

[0003] Non-patent document 1 describes a paddy field drainage volume adjustment device that limits the amount of drainage by the shape of a funnel and is attached to a free-drain type drain outlet (a type of drain outlet in which a cylindrical pipe is attached to an upward-opening drain outlet in a paddy field, and the water level in the paddy field is adjusted by moving this up and down) in order to tackle rice paddy dams. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] "Rice Paddy Dam" Handbook, Ministry of Agriculture, Forestry and Fisheries, pp. 41, 42 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when installing conventional adjustment devices in the case of free-drain type drainage outlets (a type of drainage outlet in which a cylindrical pipe called a free-drain pipe is attached to the drainage outlet of a rice paddy and the water level in the paddy is adjusted by moving it up and down), there were issues such as the device being unable to be installed as is due to interference with the handle attachment part attached to the free-drain pipe and distortion of the pipe shape over time.

[0006] The present invention addresses these issues by providing a highly versatile paddy field drainage volume adjustment device that can address problems with the handle attachment part of the free drain pipe in a free drain type drain outlet and distortion of the pipe shape that occurs over time, and can also be installed as an after-market accessory on any general circular drain outlet that opens upward to adjust the drainage volume of the paddy field. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following means. When attached to a drainage outlet that opens upward in a rice paddy, the device has two or more loading sections at the drainage outlet and a first three-dimensional forming section that forms a drainage passage, making it possible to adjust the amount of drainage.The area of ​​the drainage passage is preferably approximately the same as the area of ​​a 5cm diameter circle used in general paddy field drainage volume adjustment devices for rice paddy dam construction.

[0008] When attached to the drain outlet, the drain passage openings are formed at two or more locations.

[0009] When attached to the drain outlet, the drain passage openings are formed in two or more locations at the end of the first three-dimensional formed part, thereby preventing interference with the handle attachment part of the free drain pipe.

[0010] When attached to the drain outlet, the device is characterized by having a second three-dimensional formed part that extends vertically downward and is located inside the drain outlet, thereby preventing it from falling off.

[0011] The material has a higher specific gravity than water (for example, cement, resin, rubber, metal, etc.), so it does not float up due to buoyancy when the water level in the rice paddy rises. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a highly versatile paddy field drainage volume adjustment device that can address problems with the handle attachment part of the free drain pipe in a free drain type drain outlet and distortion of the pipe shape that occurs over time, and can also be installed as an after-market accessory on any general circular drain outlet that opens upwards, allowing the drainage volume of the paddy field to be adjusted. [Brief explanation of the drawings]

[0013] [Figure 1] 1A and 1B are a plan view and a side view of an example of an apparatus for adjusting the drainage volume of a paddy field according to the present invention (for convenience, referred to as Example 1). [Figure 2] This is an external view of an example (Example 1) of the paddy field drainage volume adjustment device of the present invention when installed in a free-drain type drain outlet, and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 3] FIG. 1 is a diagram showing the state of a paddy field drainage outlet to which the paddy field drainage volume adjusting device of the present invention is attached. [Figure 4] This is a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 2), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 5] 1A and 1B are a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 3), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 6] 1A and 1B are a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 4), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 7] 1A and 1B are a plan view and a side view of an example of a paddy field drainage volume adjusting device of the present invention (for convenience, referred to as Example 5), and a diagram showing the relationship between the paddy field drainage volume adjusting device and a paddy field drain outlet to which the paddy field drainage volume adjusting device is attached. [Figure 8]This is a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 6), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 9] This is a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 7), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 10] This is a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 8), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. [Figure 11] 1A and 1B are a plan view and a side view of an example of a paddy field drainage volume adjusting device of the present invention (for convenience, referred to as Example 9), and a diagram showing the relationship between the paddy field drainage volume adjusting device and the paddy field drain outlet to which the paddy field drainage volume adjusting device is attached. [Figure 12] This shows a plan view and a side view of an example of a paddy field drainage volume adjustment device of the present invention (for convenience, referred to as Example 10), and a diagram showing the relationship between the paddy field drainage volume adjustment device and the paddy field drain outlet to which the paddy field drainage volume adjustment device is attached. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a paddy field drainage volume adjusting device according to one embodiment of the present invention will be described. The following embodiments are provided to provide a more detailed explanation of the invention by giving several examples to facilitate a better understanding of the gist of the invention, and are not intended to limit the scope of the invention. Furthermore, the drawings used in the following description are drawn with the dimensional proportions of the components for the sake of clarity, and may not be the same as the actual dimensions.

[0015] 1 is a plan view and a side view of an example (Example 1) of the paddy field drainage rate adjusting device of the present invention. A first three-dimensional forming part 11, which is a disk with two cutouts on the edge, exerts the effect of adjusting the drainage rate, and a disk-shaped second three-dimensional forming part 12 attached to the lower part of the first three-dimensional forming part 11 exerts the effect of preventing it from falling off.

[0016] 2 is an external view of an example (Example 1) of the paddy field drainage amount adjusting device of the present invention when installed at a free-drain type drain outlet. The first three-dimensional forming part 11 in Example 1 forms a loading part 5 for the drain outlet, and a regulated amount of drainage can be discharged from the drainage passage 4 between the free-drain pipe 1. Furthermore, the first three-dimensional formed portion 11 is shaped so as not to interfere with the handle portion 2 and handle attachment portion 3 of the free drain type drain outlet, and the second three-dimensional formed portion 12 is shaped to be one size smaller than the drain outlet pipe so as to have the effect of preventing it from falling off and to be able to be installed even if the free drain pipe 1 is distorted. In addition, the shape allows for easy installation on general circular upward-facing drain outlets 8 other than the free-drain type drain outlets 7.

[0017] Figure 3 shows a diagram of a paddy field drainage outlet to which the paddy field drainage volume adjusting device of the present invention is attached. The free-drain type drainage outlet 7 is mainly composed of a free-drain pipe 1 and a circular, upward-opening main drainage pipe 6, while a typical circular, upward-opening drainage outlet 8 is composed only of a circular, upward-opening main drainage pipe 6.

[0018] 4 shows a plan view and a side view of an example (Example 2) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and a paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A cross-shaped first three-dimensional forming part 21 forms a loading part 5 for the drain outlet, allowing a regulated amount of drainage to be discharged from the drainage passage 4 between the free drain pipe 1, and multiple protruding second three-dimensional forming parts 22 attached to the lower part of the first three-dimensional forming part 21 have the effect of preventing it from falling off.

[0019] 5 shows a plan view and a side view of an example (Example 3) of the paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A first three-dimensional forming part 31 protruding from the side of a disk-shaped second three-dimensional forming part 32 forms a loading part 5 for the drain outlet, allowing a regulated amount of drainage to be discharged from a drainage passage port 4 between the second three-dimensional forming part 32 and the first three-dimensional forming part 31 and the free drain pipe 1, and the second three-dimensional forming part 32 also has the effect of preventing it from falling off.

[0020] 6 shows a plan view and a side view of an example (Example 4) of the paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be discharged from the drainage passage 4 between the disk-shaped first three-dimensional forming part 41 and the free drain pipe 1, and the polygonal frame-shaped second three-dimensional forming part 42 attached to the lower part of the first three-dimensional forming part 41 has the effect of preventing it from falling off.

[0021] Figure 7 shows a plan view and a side view of an example (Example 5) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be discharged from the drainage passage 4 between the rectangular first three-dimensional forming part 51 and the free drain pipe 1, and a cross-shaped second three-dimensional forming part 52 attached to the bottom of the first three-dimensional forming part 51 prevents it from falling off. In addition, the top of the first three-dimensional forming part 51 is provided with a three-dimensional forming part 53 that functions as a handle.

[0022] 8 shows a plan view and a side view of an example (Example 6) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be discharged from the drainage passage 4 between the triangular first three-dimensional forming part 61 and the free drain pipe 1, and multiple protruding second three-dimensional forming parts 62 attached to the lower part of the first three-dimensional forming part 61 have the effect of preventing it from falling off.

[0023] 9 shows a plan view and a side view of an example (Example 7) of the paddy field drainage rate adjusting device of the present invention, and a diagram illustrating the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. The two separate first three-dimensional forming parts 71, the joint 73 that unites the two separate first three-dimensional forming parts 71, and the drainage passage 4 between the free drain pipe 1 allow for a regulated amount of drainage, and the multiple frame-shaped protruding second three-dimensional forming parts 72 attached to the lower part of the first three-dimensional forming part 71 prevent it from falling off. The joint 73 that unites the two separate first three-dimensional forming parts 71 also functions as a handle.

[0024] Figure 10 shows a plan view and a side view of an example (Example 8) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be discharged from the drainage passage 4 between the first three-dimensional forming part 81 with multiple notches and the free drain pipe 1, and the second three-dimensional forming part 82 with multiple cylindrical protrusions attached to the bottom of the first three-dimensional forming part 81 prevents it from falling off. In addition, the first three-dimensional forming part 81 is attached with a three-dimensional forming part 83 that acts as a cylindrical handle.

[0025] 11 shows a plan view and a side view of an example (Example 9) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be drained from drainage passage 4 between first three-dimensional formed portion 91, which is shaped like a disk with two cutouts on the edge, and free drain pipe 1, and a non-slip surface 92 machined on the bottom surface of first three-dimensional formed portion 91 prevents it from falling off.

[0026] Figure 12 shows a plan view and a side view of an example (Example 10) of a paddy field drainage rate adjusting device of the present invention, and a diagram showing the relationship between the paddy field drainage rate adjusting device and the paddy field drain outlet to which the paddy field drainage rate adjusting device is attached. A regulated amount of water can be discharged from the drainage passage 4 between the first three-dimensional forming portion 101, which is a rectangular shape curved vertically and bulging in the vertical direction, and the free drain pipe 1, and the second three-dimensional forming portion 102, which is curved vertically downward, has the effect of preventing it from falling off. Note that because it is curved vertically up and down, the same effect can be achieved whether the top or bottom is facing down. [Explanation of symbols]

[0027] 1 Free drain pipe 2 Free drain pipe handle 3 Free drain pipe handle attachment 4 Drain passage port 5 Loading section of the first three-dimensional forming section for the drainage outlet 6. Drainage main 7 Free drain type drain outlet 8. Typical circular, upward-facing drain 11 First three-dimensional forming portion in Example 1 12 Second three-dimensional forming part in Example 1 21 First three-dimensional forming part in Example 2 22 Second solid formation part in Example 2 31 First three-dimensional forming part in Example 3 32 Second solid formation part in Example 3 41 First three-dimensional forming portion in Example 4 42 Second solid formation part in Example 4 51 First three-dimensional forming part in Example 5 52 Second solid formation part in Example 5 53 Three-dimensional formed part that exerts the effect of the handle in Example 5 61 First three-dimensional forming part in Example 6 62 Second solid formation part in Example 6 71 First three-dimensional forming part in Example 7 72 Second solid formation part in Example 7 73 Joint that unites two separate first three-dimensional forming parts in Example 7 81 First three-dimensional forming part in Example 8 82 Second solid formation part in Example 8 83 Three-dimensional formed part that exerts the effect of the handle in Example 8 91 First solid formation part in Example 9 92 Non-slip surface 101 First solid formation part in Example 10 102 Second solid formation part in Example 10

Claims

1. A paddy field drainage volume adjustment device characterized by having a first three-dimensional forming part that, when attached to a drainage outlet that opens upward in a paddy field, forms two or more loading sections at the drainage outlet and forms two or more drainage passage openings.

2. 2. The paddy field drainage amount adjusting device according to claim 1, wherein when attached to the drainage outlet, the drainage passage openings are formed in two or more places.

3. The paddy field drainage volume adjusting device according to claim 1, characterized in that when attached to the drainage outlet, the drainage passage openings are formed in two or more places at the end of the first three-dimensional forming part.

4. 2. The paddy field drainage volume adjusting device according to claim 1, further comprising a second three-dimensional formed portion that is positioned inside the drainage outlet when attached to the drainage outlet.

5. 2. The paddy field drainage volume adjusting device according to claim 1, characterized in that the device is made of a material having a specific gravity greater than that of water.

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