JPH0115721Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the idea that a water inlet can be formed between the weir plate and the bottom of the gutter body, and that the water intake is provided in a state where it floats up from the bottom of the gutter body. This invention relates to a water intake device for an irrigation canal that can reliably prevent the intrusion of sand, mud, etc.

(Problems to be solved by conventional techniques and ideas) As a water intake device for an irrigation canal, for example, the sixth
As shown in the figure, a water intake d whose bottom part b is flush with the bottom part c of the gutter body a is drilled in one side wall of the gutter body a having a U-shaped cross section. Direction A
A diversion channel e with a U-shaped cross section that protrudes at a right angle or at an angle of approximately 45 degrees (right angle in the figure) is provided in succession, and on the inner surfaces of both side walls f and f of the gutter body a,
At a position near the water intake d, a weir plate g is fitted vertically and slidably, and both side walls h, h of the diversion channel e are fitted.
Weir plate i is fitted on the inner surface so that it can slide up and down, and weir plate g
By operating the dam and dam plate i, water intake was dammed, and water was taken into rice fields etc. when necessary. However, when the irrigation water is dammed up by the weir plate g in the gutter body a, sand, mud, etc. that are washed away with the irrigation water are also stopped by the weir plate g.
There was a problem in that sand and the like accumulated in the vicinity of the weir plate g, and the waste sand and the like flowed into rice fields etc. through the water intake d and the diversion channel e, making it impossible to achieve good water intake.

The present invention aims to solve these problems of conventional devices.

(Means for solving the problems) The present invention aims to provide a water intake device that solves the above-mentioned problems in conventional devices using weir plates. A weir plate 5 is provided on the gutter body 3 to be formed so as to be movable up and down, and when the weir plate 5 is in the lowest position, the weir plate 5
A water inlet 21 is formed between the gutter body bottom 11 and the side wall 6 of the gutter body 3 has a weir plate 5 on the upstream side of the irrigation canal. A water intake 12 is provided, a diversion channel 7 is connected to the water intake 12, and the amount of water discharged from the diversion channel 7 is
The water amount can be adjusted using a water amount regulator 9 as required.

Note that the width of the water inlet 21 is determined by taking into account the shape of the gutter body bottom 11 in the vicinity of the weir plate 5, the flow velocity at the water inlet 21, etc. The sand, mud, etc. that flow through the water inlet 21 are not caught by the weir plate 5.
It suffices if the setting is such that it flows away through the
It is not necessarily necessary to cover the entire width of the gutter body bottom 11. Further, the opening height position of the water intake port 12 is set to such an extent that sand, mud, etc. that are washed away from the bottom part 11 of the gutter body hardly enter the inside of the diversion channel 7.

(Function) Since the water intake device of the present invention is constructed as described above, when the weir plate 5 is lowered, the water is dammed by the weir plate 5, and the amount of water used is predetermined by the water volume regulator 9. will flow into the diversion channel 7. At this time, sand, mud, etc. that are washed away with the irrigation water flow away through the water passage 21, and since the water intake port 12 is provided so as to float up from the bottom part 11 of the gutter body,
There is no risk of sand, mud, etc. entering the inside of the diversion channel 7. Conversely, if water intake is not required, the weir plate 5 is removed and the diversion channel 7 is closed by the water volume regulator 9 as necessary.

(Embodiment) Hereinafter, an embodiment of the water intake device of the present invention will be described based on the drawings, taking as an example a case where the water intake device of the present invention is applied to an irrigation canal in a rapid flow area.

1 and 2, the water intake device 1 of the present invention has a weir plate 5 provided on a gutter body 3 forming an irrigation channel 2 so as to be movable up and down, a diversion channel 7 connected to a side wall 6 of the gutter body 3, and a water intake device 1 of the present invention. The amount of water discharged from the diversion channel 7 can be adjusted by a water amount regulator 9.

The gutter body 3 is formed as a concrete block having a U-shaped cross section set to a standard length, and guide grooves 10, 10, 10, 10 are provided. In addition, a water intake port 12 consisting of a circular hole is opened at approximately the center in the longitudinal direction of one of the side walls 6, floating above the bottom part 11 of the gutter body, and the water intake port 12 is formed as a pipe. A diversion waterway 7 is also provided. The opening height position of the water intake port 12 is set to such an extent that sand, mud, etc. that are washed away from the bottom part 11 of the gutter body do not enter the inside of the diversion channel 7, for example, about 5 cm. In addition, the water amount regulator 9 has a through hole 15 provided in the upper part of a disc-shaped cover plate 14 that can close the open end 13 of the water diversion channel 7, as shown in FIGS. 1 and 3, for example. By screwing a bolt 16 inserted through the through hole 15 into a screw hole 17 provided in the upper part of the open end 13, and tightening the bolt 16, the cover plate 14 can be rotated arbitrarily as shown in FIG. It is configured so that it can be fixed at an angle. Therefore, by setting the rotation angle of the cover plate 14 to a predetermined value, the amount of water discharged from the diversion channel 17 can be adjusted.

The weir plate 5 can be raised and lowered by being guided by the opposing guide grooves 10, 10 on both sides, and has a trapezoidal notch 20 at its lower end except for the both sides.
is provided, and when the weir plate 5 is in the lowest position, between the weir plate 5 and the flat gutter body bottom 11,
A rectangular water inlet 21 that spans approximately the entire width of the gutter bottom 11
is formed.

The height of the weir plate 5 is determined by the height of the gutter body 3 in order to suppress the water jumping phenomenon caused by the weir plate 5 as much as possible, considering that the water intake device 1 of this embodiment is applied to an irrigation canal especially in a rapid flow area. It is set at about 1/2 to 1/3 of the depth.

FIG. 4 shows another embodiment of the water intake device 1 of the present invention, in which a gutter body 3 having a structure similar to the gutter body shown in FIG. A water intake 12 is formed by cutting out a water intake 22 which is positioned upwardly from the bottom part 11 of the gutter body, a diversion channel 23 having a U-shaped cross section is connected to the water intake 12, and the diversion channel 23 is formed as a weir plate. A water amount regulator 9 is provided which can be raised and lowered freely.

Note that the water amount regulator 9 can be of various configurations that can adjust the amount of water discharged from the diversion channel 23, and in extreme cases, it may be installed with a cap that completely blocks the inflow of water into the water intake port 12. It may also be configured as

(Effect of the invention) As mentioned above, the water intake device 1 of the invention has the following effects when the weir plate 5 is installed:
As if a water inlet 21 is formed between the
In addition, since the water intake port 12 is provided in a state where it floats up from the bottom part 11 of the gutter body, waste materials such as sand and mud that are washed away with the water flow into the water intake port 12.
There is no risk of the water flowing into rice fields, etc. through the water diversion channel 7, and good water intake can be achieved.

A portion of the water dammed up by the dam plate 5 flows through the water inlet 2.
Since the water flows out through the weir plate 1, the splashing phenomenon caused by the weir plate 5 can be alleviated. In particular, as shown in the embodiment, when the height of the weir plate 5 is set to a fairly low value of about 1/2 to 1/3 of the groove depth of the gutter body 3, it is necessary to prevent water from flowing out from the water inlet 21. In addition, since the irrigation water flows over the weir plate 5, even when the water intake device of the present invention is applied to an irrigation channel in a rapid-flowing area, water jumping phenomenon can be suppressed.

In addition, as shown in Figures 1 and 2, if the width of the water inlet 21 is allowed to be set smaller than the width of the gutter bottom 11, even when the flow rate is small, the weir plate Lower end protruding part 2 of 5
Due to the damming action of 5 and 25, it is possible to obtain a water level that does not cause any problem in water intake. Furthermore, as shown in FIGS. 1 and 4, the gutter body 3
Guide grooves 10, 10, 10, 1 are provided near both ends of the
0 and when opening the water intake 12 approximately in the center of one side wall 6, by reversing the installation of the gutter body 3 into the irrigation canal 2, for example, the fifth
As shown in Figures a and b, the protruding direction of the diversion channel 7 can be reversed.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
Figure 3 is an exploded perspective view of the device, Figure 3 is a perspective view showing an example of a water volume regulator along with its function, Figure 4 is a perspective view showing another embodiment of the present invention, and Figures 5a and b are FIG. 6 is a perspective view illustrating a conventional water intake device. 1...Water intake device, 3...Gutter body, 5...Weir board, 6
...Side wall of gutter body, 7...Diversion channel, 9...Water volume regulator, 11...Gutter body bottom, 12...Water intake, 21...
...Water port.

Claims (1)

[Scope of utility model registration request] A weir plate 5 is provided on the gutter body 3 forming the irrigation channel so as to be able to move up and down, and when the weir plate 5 is in the lowest position, a water passage port 21 is formed between the weir plate 5 and the gutter body bottom 11. None, and on the side wall 6 of the gutter body 3,
A water intake device for an irrigation canal, characterized in that a water intake 12 is provided in an upstream portion of the irrigation canal with a weir plate 5 as a boundary, floating from a gutter bottom 11, and a diversion channel 7 is connected to the water intake 12.