JP2589630B2 - Water control device for sabo dam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water discharge device installed in a sabo dam to be used as a reservoir for red soil sedimentation and to reduce red soil from being discharged downstream.

[0002]

2. Description of the Related Art Soil runoff (so-called red soil pollution) due to mountainous land development has become a major social problem in the Nansei Islands, particularly in Okinawa Island. The muddy red soil from the river accumulates on the seabed near the estuary and is spread along the tidal current. In addition, the deposited red soil re-suspends due to waves in strong winds, and is spread along tidal currents and blowing currents, expanding the contaminated area. This red soil pollution has damaged coral habitats and fisheries. In particular, the disappearance of coral is a serious problem for the resort tourism industry that uses coral reefs as tourism resources, and the disappearance of coral habitats, the only animals that can absorb carbon dioxide, is also a problem from the global environment. In order to reduce this red soil pollution as much as possible, a sabo dam used as a reservoir for red soil sedimentation is installed in rivers.

[0003]

When a sabo dam is provided, the dam is clogged with red soil and forced to be full, and turbid flow of red soil overflows the dam due to rainfall. Therefore, it is still impossible to prevent the outflow of red soil.
The present invention is a water discharge device for a sabo dam capable of following a water level of a river so that surface water can be taken out and discharged little by little,
By installing this in a sabo dam, surface water with a low red soil content is withdrawn and discharged little by little, thereby reducing the storage volume of the sabo dam little by little and securing the water storage during rainfall. It has the function of a reservoir for red soil sedimentation that can prevent the outflow of red soil .
Loss of buoyancy of water discharge device due to inflow of water into drainage pipe during water discharge
And the draft rises and the amount of water discharge is about to increase
It can be stopped automatically .

A water discharge device for a sabo dam according to the present invention comprises a vertical guide member 1 attached to a side surface of a sabo dam B, and a frame 2 attached to the guide member 1 so as to be vertically slidable.
The frame 2 is fixed to the frame 2 so as to be positioned at a predetermined water level, and the horizontal cross-sectional area above and below the draft line sharply increases.
A floating body arranged as increasing , a drinking mouth 6 slidably supported by the frame body 2 in a vertical direction, a telescopic tube 7 connected to the drinking mouth 6, an upper end to the telescopic tube 7, and a lower end to a dam. It has a drain pipe 8 connected to the outlet C and having an upper part fixed to the frame 2, and a mouth position adjusting device 9 attached between the frame 2 and the mouth 6.

[0005]

In the vicinity of the outlet of the drinking port 6, a water intake adjusting device is provided.
It is good to have 10.

[0007]

The water discharge device A for the sabo dam of the present invention is installed in the water of the sabo dam B as shown in FIG. 1, and the lower end of the drain pipe 8 is connected to the dam discharge port C. Since the water discharge device A is provided with a floating body, the buoyancy causes the frame 2 to float in the sabo dam B, and a small amount of surface water having a small amount of red soil flows from the mouthpiece 6 thereof, and is connected thereto. The water is discharged from the dam discharge port C through the telescopic pipe 7 and the drain pipe 8. Therefore, the amount of water stored in the sabo dam B gradually decreases, and the amount of water stored during rain can be secured. In addition, since surface water is taken from the spout 6, the bottom of the sabo dam B is kept relatively quiet.
Therefore, the red soil settled at the bottom of the sabo dam B is less likely to be disturbed and floated, and as a result, the red soil flowing out of the sabo dam B can be reduced.

[0008] By the way, by taking water out of the drinking mouth 6,
Alternatively, the water level L of the sabo dam B fluctuates due to rainfall, but the water discharge device A for the sabo dam of the present invention follows the water level L. That is, the position of the frame 2 floating by the floating body changes according to the fluctuation of the water level L. At this time, the frame 2 moves along the vertical guide member 1 attached to the side surface of the sabo dam B. Slide up and down.

When it is desired to adjust the position of the mouthpiece 6 in the height direction, the mouthpiece position adjusting device 9 is operated. This allows
The position of the entrance of the drinking mouth 6 can be raised or lowered as needed. When the position of the spout 6 is high, a small amount of water flows into the spout 6, and when the position of the spout 6 is low, a large amount of water flows into the spout 6. As described above, by operating the drinking-spot position adjusting device 9 to adjust the position of the drinking-sink 6 in the height direction, the water intake amount can be easily adjusted. In addition, since the telescopic pipe 7 is connected between the mouthpiece 6 and the drainage pipe 8, the vertical movement caused by adjusting the position of the mouthpiece 6 in the height direction is absorbed by the telescopic pipe 7, and the fluctuation is absorbed by the drainage pipe 8. Does not affect

The drain pipe 8 is made thick to prevent dust and the like from being clogged by being supported in the middle. Therefore, the buoyancy acting on the drainage pipe is quite large. Normally, when water is discharged little by little, the position is adjusted so that the mouthpiece 6 is located slightly below the surface of the water. At this time, the inside of the drain pipe 8 is almost a space, and buoyancy is working. When increasing the amount of water discharge, the water level of the mouthpiece 6 is slightly lowered. Then, the amount of water in the drain pipe 8 increases, the buoyancy is lost, the frame 2 descends, the drinking mouth 6 further descends, the amount of water discharge increases, and the amount of water stored in the sabo dam B sharply decreases. In order to prevent this, the floating bodies are arranged such that the horizontal cross-sectional area of the floating body immediately above the draft line increases rapidly . Therefore, when the water level of the bung hole 6 the frame 2 down decreases, it is possible to prevent the bung hole 6 floating buoyancy increases sharply decreases more than necessary.

If the water intake amount adjusting device 10 is provided near the outlet of the mouthpiece 6, even if the surface water is taken from the mouthpiece 6 and the water flows into the telescopic tube 7 and the drainage tube 8, it is floating. It is possible to prevent the frame body 2 from suddenly descending, and it is possible to prevent a large amount of water from flowing into the drinking mouth 6 that has descended together with the frame body 2 to make it difficult to adjust the water discharge amount (water intake amount). That is, when adjusting the water discharge amount (water intake amount), it is usual to squeeze the drain pipe 8 near the dam discharge port C. In this case, the drain pipe 8 is constantly filled with water.
The floating frame 2 drops suddenly. Therefore,
Although a large amount of water flows into the drinking mouth 6 that has descended together with the frame 2, it is difficult to adjust the amount of water discharge (water intake). However, as in the case of the present invention, the water intake adjusting device 10 is located near the outlet of the drinking mouth 6.
When the water intake amount is adjusted at that position, it is possible to prevent the adjustment of the water discharge amount (water intake amount) from becoming difficult.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water discharge device for a sabo dam according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view showing a usage state of the water discharge device A for the sabo dam. As shown in FIG.
A guide member 1 is disposed vertically on the side surface of the sabo dam B, and a frame 2 is attached to the guide member 1 so as to be slidable in the vertical direction. In order to make the frame 2 slidable in the vertical direction with respect to the guide member 1, for example, as shown in FIG. The guide member 1 is preferably sandwiched between the slide rollers 3 and 4. In the illustrated embodiment, the guide members 1 and 1 are arranged on the side surface of the sabo dam B so that two guide members are provided on the left and right sides. (Appears above and below). Also, a pair of slide rollers 3 and 4 are provided so as to form one set of upper and lower parts as shown in FIG.

In the frame 2, a floating body for fixing the body at a predetermined water level is fixed. 4 to 7 show the arrangement of the floating body with respect to the frame 2. 4 is a plan view, FIG. 5 is a front view, FIG. 6 is a right side view, and FIG. 7 is a left side view. As is apparent from these drawings, a plurality of floating bodies are arranged for one frame 2. That is, at the two corners appearing on the right side in FIG. 4, floating bodies 5a, 5a having the same shape and the same size as shown in FIG. 6 are arranged so as to be symmetrical, and between the floating bodies 5a, 5a. One floating body 5b is arranged. In addition, in the portion appearing on the left side in FIG. 4, floating bodies 5c, 5c having the same shape and the same size as shown in FIG.
One floating body 5d is arranged between the two floating bodies 5c. Then, two identical floating bodies 5a, 5a appearing on the right side in FIG. 4, two identical floating bodies 5c, 5c appearing on the left side in FIG. 4, one floating body 5b located between the floating bodies 5a, 5a, and between the floating bodies 5c, 5c Are located at the same position, but their lower surfaces (bottom surfaces) are different in height so that 5a is at the bottom and 5b and 5d are at the same position at the top. It is closed (see FIGS. 5 to 7). In particular, the lower surfaces (bottom surfaces) of the floating bodies 5b and 5d
Is located at a height substantially coincident with the draft line of the water discharge device A. This is to ensure that the horizontal cross-sectional area of the floating body immediately above the draft line increases rapidly .
If a plurality of floating bodies are arranged for one frame body 2 and the floating bodies are arranged so that the horizontal cross-sectional area of the floating body immediately above the draft line increases sharply, as will be described in detail later, Surface water is taken from the pipe, and the telescopic pipe 7 and the drain pipe 8
Even when the water is flowing into, never total buoyancy is lost the floating buoyancy located above water line.

[0014] Six floating bodies 5a, 5a,
In a space surrounded by 5b, 5c, 5c, and 5d, an inverted cup 6 is slidably supported in a vertical direction, and a telescopic pipe 7 is maintained at a short pipe 6a at the lower end of the cup 6. As shown in FIG. 1 and FIG.
The lower end is connected to a dam discharge port C provided at the bottom of the side surface of the sabo dam B as shown in FIG. In the embodiment, the drainage pipe 8 is formed of a curved pipe 8a and a flexible pipe such as a hose.
8b, a curved pipe at the top of the drainage pipe 8
The case where the portion 8a is fixed to the bottom of the frame 2 will be exemplified.

In supporting the mouthpiece 6 slidably in the vertical direction with respect to the frame 2, in the embodiment, four guides are provided at 90 ° intervals outside the mouthpiece 6 as shown in FIG. Lumber 6b
Are arranged in the vertical direction, and the outer edges of the guide members 6b in the longitudinal direction are supported by being fitted into grooves of guide rollers 2a rotatably fixed to the frame 2, respectively. In FIG. 3, one guide member 6b is used.
In contrast, the guide rollers 2a are arranged so as to form a pair of upper and lower rollers.

Then, between the frame 2 and the spout 6, a spout position adjusting device 9 is attached. The mouth position adjusting device 9 in the embodiment includes a handle 9a projecting above the frame 2 directly above the mouth 6, a disk-shaped plate 9c screwed onto its male screw 9b, and the plate 9c and the mouth 6 And a plurality of suspension bolts 6d for connecting the flange 6c formed around the upper end opening thereof at a predetermined interval.
It is composed of In this case, handle 9a
The plate 9c is moved in any of the upper and lower directions while maintaining a horizontal state by turning the left or right direction, and the drinking spout 6 connected to the plate 9c by a plurality of suspension bolts 6d is also moved in either of the upper and lower directions. Move in the direction. Therefore, the position of the upper end opening of the mouthpiece 6 with respect to the frame 2 can be freely adjusted as needed. In the case of the embodiment, the up-and-down movement of the mouthpiece 6 is performed while being supported by the guide rollers 2a arranged at four places at intervals of 90 degrees. The drinking water position adjusting device 9 is not limited to the one shown in the embodiment.
For example, various means such as fixing the cylinder to the frame 2 and moving the drinking mouth 6 up and down by its operation can be adopted.

It is preferable to provide a water intake adjusting device 10 near the outlet of the drinking cup 6, which is in the shape of an upside-down, for example, in the vicinity of a small diameter. In order to adjust the amount of water taken from the mouthpiece 6, the diameter near the mouth of the mouthpiece 6 may be reduced. For example, as shown in FIG. By covering, the amount of water taken from the mouthpiece 6 can be easily adjusted.

In the other drawings, reference numeral 11 (FIG. 2)
Is a net made of expanded metal or the like stretched over the entire upper surface of the frame 2, and reference numeral 12 (FIG. 1) is a net stretched on the side surface of the frame 2, both of which are the water discharge device A. This is for preventing driftwood and other refuse from flowing from the drinking mouth 6 during use.

Next, a method of using the water discharging device A shown in the embodiment will be described in detail. This water discharge device A is installed in the water of a sabo dam B as shown in FIG. 1, and the lower end of a hose 8 is connected to a dam discharge port C. This water discharge device A has six floating bodies
5a, 5a, 5b, 5c, 5c, 5d are provided, and at least four of the floating bodies 5a, 5a, 5c, 5c are provided with the buoyancy of the frame 2a.
The part is floating in Sabo Dam B. And the mouth 6
Surface water with low red soil content flows from the
The water is discharged from the dam discharge port C through a drain pipe 8 composed of a flexible pipe 6a and a flexible pipe 8b such as a hose. Therefore, sabo dam B
The amount of water stored in is gradually decreasing, and the amount of water stored during rain can be secured. In addition, since surface water is taken from the spout 6, the bottom of the sabo dam B is kept relatively quiet. Therefore, the red soil settled at the bottom of the sabo dam B is less likely to be disturbed and floated, and as a result, the red soil flowing out of the sabo dam B can be reduced.

The water is discharged from the spout 6 or
Although the water level L of the sabo dam B fluctuates due to rainfall, the water discharge device A follows the water level L. That is, at least four floating bodies 5 out of the six floating bodies 5a, 5a, 5b, 5c, 5c, 5d.
The position of the frame 2 floating due to the buoyancy of a, 5a, 5c, 5c changes according to the fluctuation of the water level L. At this time, the frame 2 is mounted on the side surface of the sabo dam B in the vertical direction. Lumber 1
Slide up and down along. Therefore, frame 2
Follows the water level L stably without tilting.

When it is desired to adjust the position of the mouthpiece 6 in the height direction, the handle 9a serving as the mouthpiece position adjusting device is turned to the left or right. Then, the plate 9c via the male screw 9b
Is moved upward or downward while maintaining a horizontal state, and the drinking spout 6 connected to the plate 9c by a plurality of suspension bolts 6d is also moved upward or downward. Therefore, the position of the upper end opening of the mouthpiece 6 with respect to the frame 2, that is, the position of the mouthpiece 6 in the height direction can be freely adjusted. When the position of the spout 6 is high, a small amount of water flows into the spout 6, and when the position of the spout 6 is low, a large amount of water flows into the spout 6. In this manner, by turning the handle 9a in the left or right direction to adjust the position of the drinking mouth 6 in the height direction, the amount of water taken can be easily adjusted. In addition, the drinking mouth 6 and the drain pipe 8
Since the telescopic tube 7 is connected between the two, the vertical movement due to the height adjustment of the mouthpiece 6 is absorbed by the telescopic tube 7, and the fluctuation does not affect the drainage pipe 8.

As described above, in the embodiment, a plurality of floating bodies are arranged as shown by 5a to 5d with respect to one frame 2, and the lower surfaces (bottom surfaces) of the floating bodies 5b and 5d are drafted by the water discharging device A. And the horizontal cross-sectional area of the floating body immediately above the draft line is sharp.
To increase. In this way, the mouth 6
Even if surface water is taken in from and water flows into the telescopic pipe 7 and the drain pipe 8, the buoyancy of the floating bodies 5 b and 5 d located above the draft line does not lose the entire buoyancy. When the water flows into the drinking mouth 6 and the inside of the telescopic tube 7 and the drainage tube 8 becomes full, the buoyancy suddenly decreases compared to before the water flows, and the entire buoyancy of the plurality of floating bodies is lost. When this phenomenon occurs, the floating frame 2 suddenly descends, and a large amount of water flows into the drinking mouth 6 that has descended along with the frame 2, and the amount of discharged water rapidly increases. However, if there by positioning to come to the height of the lower surface of the floating body, as shown by reference numeral 5b and 5d of the plurality some floating body (bottom) substantially coincides with the water line of the water discharge device A, water bung hole 6 When the frame 2 that is floating due to the flow of water is about to descend, the frame 2 does not descend any further due to the buoyancy of the two floating bodies 5b and 5d above the draft line. Therefore, it is possible to prevent the bung hole 6 drops suddenly, suddenly water amount discharged water increases rapidly flows a large amount of water bung hole 6 was lowered to is prevented facilitate drained rapidly be able to.

Further, in the embodiment, the donut-shaped middle lid 10a, which is a water intake adjusting device, is placed near the outlet of the mouthpiece 6, but the donut-shaped middle lid 10a is located near the outlet of the mouthpiece 6. If it is covered, even if surface water is taken from the drinking mouth 6 and water flows into the telescopic pipe 7 and the drain pipe 8, the floating frame 2 suddenly descends and suddenly moves together with the frame 2. It is possible to prevent a large amount of water from flowing into the spout 6 that has fallen to make it difficult to adjust the amount of water discharge (water intake). That is, when adjusting the water discharge amount (water intake amount), it is usual to squeeze the drain pipe 8 near the dam discharge port C. In this case, the telescopic pipe 7 and the drain pipe 8 are constantly filled with water. , The floating frame 2 suddenly descends. Therefore, it is difficult to adjust the amount of water discharged (amount of water taken in) by flowing a large amount of water into the drinking mouth 6 that has been lowered together with the frame body 2. When the lid 10a is covered and the water intake is adjusted at that position, it is possible to prevent the water discharge (water intake) from being difficult to adjust.

[0024]

When the water discharge device according to claim 1 is installed in the sabo dam B, surface water having a low red soil content can be taken out and discharged little by little while following the water level of the river.
Not only can the amount of water stored during rainfall be easily secured, but the red soil settled at the bottom of the sabo dam B hardly disturbs or floats, and as a result, the red soil flows out of the sabo dam B Can be reduced . In this case smell
And the horizontal cross-sectional area above and below the draft line increases sharply
The draft position is set by the buoyancy of the floating body
A slight rise in buoyancy will increase sharply. This sudden buoyancy
Due to the increase in
The buoyancy of the station is lost, the draft increases, and the amount of water discharge increases.
Can be automatically blocked from
It is easy to prevent a sudden increase in water volume and a sudden decrease in water storage volume.
There is an effect that can be stopped .

[0025]

According to the second aspect of the present invention, there is an effect that it is possible to easily prevent the adjustment of the amount of discharged water (the amount of taken water) from becoming difficult.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a use state of a water discharge device for a sabo dam according to an embodiment of the present invention.

FIG. 2 is a plan view of a water discharge device for a sabo dam according to an embodiment of the present invention.

FIG. 3 is a front view showing an internal structure of a water discharge device for a sabo dam according to an embodiment of the present invention.

FIG. 4 is a plan view showing an arrangement state of a plurality of floating bodies with respect to a frame.

FIG. 5 is a front view showing an arrangement state of a plurality of floating bodies with respect to a frame.

FIG. 6 is a right side view of FIG.

FIG. 7 is a left side view of FIG.

FIG. 8 is an enlarged view showing an example in which a water intake amount adjusting device is provided near an outlet of a drinking mouth.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide material, 2 ... Frame body, 5a-5d ... Floating body, 6 ... Drinking mouth, 7 ... Telescopic pipe, 8 ... Drainage pipe, 9 ... Drinking mouth position adjusting device, 10 ... Water intake amount adjusting device, B ... Sabo dam, C ... the dam outlet.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-287908 (JP, A) JP-A-62-294610 (JP, A) JP-B-60-18765 (JP, B2) Jiko-Sho60- 29477 (JP, Y2)

Claims (2)

(57) [Claims] 1. A vertical guide member 1 attached to a side surface of a sabo dam B, a frame 2 slidably mounted on the guide member 1 in a vertical direction, and a frame 2 for positioning the frame 2 at a predetermined water level. Fixed to the frame 2 above the water line
A floating body arranged so that the horizontal cross-sectional area increases rapidly, and a drinking mouth 6 slidably supported on the frame body 2 in a vertical direction.
And a telescopic tube 7 connected to the mouthpiece 6 and an upper end of the telescopic tube 7
A drain pipe 8 having a lower end connected to the dam discharge port C and an upper part fixed to the frame body 2;
A water discharge device for a sabo dam, comprising a drinking water position adjusting device 9 attached between the water discharge devices. 2. The water discharge device for a sabo dam according to claim 1, further comprising a water intake adjusting device near the outlet of the drinking mouth.