JP5296918B1 - Intake mechanism of Sabo Dam - Google Patents

Abstract

[PROBLEMS] It is possible to easily switch between a normal intake mode and a non-intake mode of water intake when flooding or sediment is deposited on the bottom, preventing inflow of fallen leaves, pebbles and fine grains Elimination of soil from the water intake can also be performed reliably.
[MEANS FOR SOLVING PROBLEMS] Water intake is possible, and when flooding or earth and sand accumulates on the bottom of the water intake basin, the water intake basin is deformed to avoid trouble caused by accumulation of flood or earth and sand. In the intake mechanism of the sabo dam that resumes water intake by returning to the original water intake form,
The deformable water intake trough comprises a dust removing screen having one end held at the upper end of the water passage of the sabo dam, a side plate having one end connected to the other end of the dust removing screen, and one end being a deformable section at the other end of the side plate. And a rotating arm having one end connected to the other end of the bottom plate and the other end held on the wall surface of the sabo dam, and the operation of the rotating arm switches the form of the water intake trough. I made it.
[Selection] Figure 2

Description

The present invention relates to a water intake mechanism of a sabo dam for storing a large amount of sediment on the upstream side during a flood and taking water from a sabo dam protecting the downstream side from a landslide disaster.

The function of the sabo dam is to store a large amount of sediment on the upstream side during floods and protect the downstream side from sediment disasters. At the same time, however, it is one of the important functions of the sabo dam to allow the stored sediment to flow down after the flood and quickly restore the sand storage capacity to prepare for the next flood. Therefore, when planning water intake from a sabo dam, a large amount of earth and sand must pass around the water intake facility.
On the other hand, sabo dams are usually surrounded by mountains, and a large amount of fallen leaves occur in the autumn on the upstream side. Water intake from sabo dams must also allow the passage of such a large amount of fallen leaves.
The fallen leaves can be prevented from flowing in by providing a dust removing screen on the upper surface of the water intake trough, but the former pebbles and fine-grained soil cannot be prevented from flowing in by the dust removing screen.
Therefore, a mechanism for removing pebbles and fine-grained soil deposited on the bottom of the water intake basin from the water basin is required.

As the water intake mechanism of the sabo dam as described above, the present inventor previously described a water intake dam that can be overturned or deformed in Japanese Patent Application No. 2010-165972 (see Japanese Patent Application Laid-Open No. 2012-26167, Patent Document 1). In the normal state, water can be taken with the water intake basin by extending the end of the terminal to the sleeve of the sabo dam. Spill dam intake mechanism that, when occurring, avoids problems caused by flooding or clogging by overturning or deforming the intake basin, and when the flood or clogging is resolved, the intake basin is restored to its original state Proposed.

JP 2012-026167 A

In the intake mechanism of the sabo dam, an intake or deformable intake basin is disposed downstream of the sabo dam and the terminal is extended to the sleeve of the sabo dam, so that the intake basin is normally used. Water intake is possible, and when a clog occurs in the water intake basin due to flooding or earth and sand, the water intake basin is overlaid or deformed to avoid trouble due to flood or clogging.

However, in the invention of Japanese Patent Application No. 2010-165972 (hereinafter referred to as the previous application), there are the following problems.
1) In the previous application, when a large amount of fallen leaves flowed in the fall, the water intake basin is immediately clogged and the water intake must often be interrupted.
2) In the previous application, water pressure is applied from the inside of the water intake basin to the plate material constituting the water intake basin, so a large moment load is applied as a cantilever beam. Since the same large moment load is applied when falling or standing up, the plate material is required to have rigidity and a large amount of power for standing up is required.
3) In the previous application, if the fall of the plate material is delayed in the event of a flood, the cobblestone or driftwood that has flowed down may directly hit the plate material, which is very easy to break.

Therefore, the intake mechanism of the sabo dam of the present invention has a relatively simple structure and is easy to maintain, and is in a normal intake state and in a non-intake state of intake dredging at the time of flooding or sediment discharge. It is intended to provide a water intake mechanism for a sabo dam that can be easily switched, and can prevent the inflow of fallen leaves and the like, and can reliably remove pebbles and fine-grained soil from dredging.

That is, the water intake mechanism of the sabo dam according to the present invention has a U-shaped water channel and a deformable water intake basin arranged on the downstream side of the sabo dam and extends its end to the sleeve of the sabo dam. In this case, it is possible to take water in the form of water intake when the water intake is taken, and when sedimentation occurs at the bottom of the water intake dredge due to floods or earth and sand, etc. In the sabo dam intake mechanism, when the flood or clogging is resolved, the intake basin is restored to the original intake form and the intake is resumed.
The deformable water intake trough has a dust removing screen having one end pivotably held at the upper end of the water control downstream of the sabo dam, a side plate rotatably connected to the other end of the dust removing screen, and one end A bottom plate rotatably connected to the other end of the side plate, one end rotatably connected to the end of the deformable section of the other end of the bottom plate within a predetermined angle range, and the other end downstream of the sabo dam It consists of a rotating arm that is rotatably held using a fixed shaft on the wall of the sabo dam at a predetermined interval from the upper end on the side,
In a normal state, the side plate and the bottom plate form a U-shaped water channel by holding a rotating arm rotatably held on the wall surface of the sabo dam upward along the wall surface and supporting the bottom plate almost horizontally. In addition, a dust removing screen is arranged on the upper surface with the necessary inclination angle maintained,
When discharging floods and sediments, the dust removal screen, side plate, and bottom plate are deformed along the side wall by rotating a rotating arm rotatably held on the wall of the sabo dam downward along the side wall. However, it is possible to shift to a non-water intake mode.

In the water intake mechanism of the sabo dam according to the present invention, the rotary arm and the bottom plate that are rotatably held on the wall surface of the sabo dam using a fixed shaft are a rotary arm in which the bottom plate is held upward along the side wall during water intake. It is also characterized by being held so as to protrude outward at a predetermined angle from the upper end.

In the water intake mechanism of the sabo dam according to the present invention, the rotary arm rotatably held on the wall surface of the sabo dam by using a fixed shaft extends the fixed shaft toward the sleeve direction of the sabo dam and is attached to the end thereof. Further, the fixed shaft and the rotary arm can be rotated by using a manual handle or a power source.

A comparison of the present invention with the above configuration and the previous application is as follows.
1) In the previous application, if a large amount of fallen leaves flowed in the fall, the buds are immediately clogged, and water intake must often be interrupted. In the present invention, there is a Tyrolean type dust removing screen at the top of the tub, and the structure is such that dust such as leaves and branches cannot be put in the tub, so that the water intake is rarely interrupted.
2) In the previous application, water pressure is applied from the inside of the water intake basin to the plate material constituting the water intake basin, so a large moment load is applied as a cantilever beam. Since the same large moment load is applied when falling or standing, the side wall is required to have rigidity and a large amount of power is required for standing.
On the other hand, in the present invention, when the water intake basin is re-formed, since the water intake basin is an assembly of simple beam structural members, there is no portion that receives a large moment load due to falling water. Small things are enough.
3) In the previous application, if the fall of the side wall is delayed in the event of a flood, the cobblestone or driftwood that has flowed down may hit the side wall, which is very easy to break. In the present invention, a dust removing screen is present at the top of the ridge and is difficult to break to protect other members.

Since the intake mechanism of the sabo dam of the present invention is configured as described above, the structure is simple and maintenance is easy, and the normal intake mode and the dredging tank when flooding or sediment is deposited on the bottom. Thus, it is possible to provide a water intake mechanism for a sabo dam that can be easily switched to the non-water intake mode and can reliably prevent the inflow of dust.

In addition, since the Tyrolean type dust screen is attached to the upper part of the water intake trough, the water intake is not stagnated. If dust accumulates on the dust removal screen, it will be pushed to the downstream end of the dust removal screen by the force of the flowing water. Since the dust is washed away by this, the method of automatically recovering the water intake capacity of the dust screen is called the Tyrolean method.

It is a front view which shows embodiment of the water intake mechanism of the sabo dam of this invention. It is a side view at the time of water intake. It is a side view which shows the 1st process of folding at the time of non-water intake. It is a side view which shows the 2nd process of folding at the time of non-water intake.

Embodiments of a water intake mechanism for a sabo dam according to the present invention will be described below in detail with reference to the drawings.
As shown in FIGS. 1 to 4, the water intake mechanism of the sabo dam according to the present invention is configured such that a foldable intake trough 12 is disposed on the downstream side of the sabo dam 11 and the end thereof is a sleeve portion 13 of the sabo dam 11. It is extended to.
By doing so, in the normal state, water can be taken in by the water intake basin 12, and when flooding or earth and sand is deposited on the bottom of the water intake basin 12, the water intake basin 12 is deformed to flood or sediment. Thus, when the accumulation of floods, earth and sand, etc. is resolved, the water intake basin 12 can be returned to the original state and the water intake can be resumed.

The water intake mechanism of the sabo dam according to the present invention will be described in more detail. The deformable water intake trough 12 has one end held at the upper end on the downstream side of the sabo dam 11 so as to be swingable by the first fixed shaft 31. A dust removing screen 21, a side plate 22 having one end rotatably connected to the other end of the dust removing screen 21 by a first intermediate shaft 32, and one end rotatably connected to the other end of the side plate 22 by a second intermediate shaft 33. The bottom plate 23 and one end thereof are connected to the other end of the bottom plate 23 and the third intermediate shaft 34 so as to be rotatable within a predetermined angle range, and the other end is connected to the wall surface 14 at a predetermined interval from the upper end of the sabo dam 11 on the downstream side. The rotary arm 24 is rotatably held by the second fixed shaft 35.
The dust removing screen 21 is provided only in the water drainage portion of the sabo dam 11, and the side plate 22 and the bottom plate 23 that constitute the water channel of the water intake basin 12 are extended to the sleeve 13 of the sabo dam 11.

The rotary arm 24 and the bottom plate 23 are held so that the bottom plate 23 protrudes outward at a predetermined angle from the upper end of the rotary arm 24 held upward along the side wall 14 during water intake. As the angle holding means at this time, a stopper 34 a provided in the bearing portion of the third intermediate shaft 34 can be used. That is, the stopper 34a prevents the angle from becoming smaller than a predetermined angle (θ). Conversely, the angle (θ) is free to increase. Of course, the angle holding means is not limited to the stopper 34a.

(Intake mode)
In a normal state, the side plate 22 is supported by holding the rotating arm 24 held on the wall surface 14 of the sabo dam so as to be rotatable by the second fixed shaft 35 upwardly from the second fixed shaft 35 along the side wall 14. The bottom plate 23 and the bottom plate 23 constitute a U-shaped water channel, and a dust-removable screen 21 is provided on the upper surface thereof.
(Non-intake mode)
On the other hand, when flooding or earth and sand accumulates on the bottom of the intake basin, the rotary arm 24 rotatably held by the second fixed shaft 35 on the wall surface 14 of the sabo dam is fixed along the side wall 14. By rotating downward about the shaft 35, the dust removing screen 21, the side plate 22 and the bottom plate 23 are deformed along the side wall 14.

Below, the process of operation from the state at the time of water intake in FIG. 2 to the state at the time of non-water intake in FIG. 4 will be described.
1) First, as shown in FIG. 3, at the time of non-water intake (at the time of flooding), water has already been taken from the dust removing screen 21 due to strong water, but cobbles, driftwood, etc. that have flowed down are on the dust removing screen 21. May pass.
Therefore, when the rotary arm 24 is rotated downward with the second fixed shaft 35 as a base point, the bottom plate 23 held at a predetermined angle with respect to the rotary arm 24 causes the side plate 22 and the dust removing screen 21 to face downward at the same angle. Pull it down.
At that time, when the bottom plate 23 is separated from the wall 14 of the sabo dam, the bottom is removed, and the sand and dust collected at the bottom of the water intake basin 12 are sanded downward together with the water accumulated at the top. Discharged.
2) As shown in FIG. 4, when the rotary arm 24 is rotated to a predetermined angle and the dust removing screen 21 and the side plate 22 are linearly deformed, the angle between the rotary arm 24 and the bottom plate 23 is set to a predetermined angle. The engagement with the stopper 34 a held at (θ) is released, the rotary arm 24 and the bottom plate 23 are folded downward at the third intermediate shaft 34, and the bottom plate 23 is aligned with the dust removing screen 21 and the side plate 22. Thus, it is deformed along the wall surface 14 of the sabo dam.

In the water intake mechanism of the sabo dam according to the present invention, it is desirable that the manual rotary arm 24 rotatably held by the second fixed shaft 35 on the wall 14 of the sabo dam can be operated on the sleeve of the sabo dam 11. .
As such an operation means, not only a rotary handle (manual type) attached to an end of the second fixed shaft 35, but also a power such as a motor drive connected to the second fixed shaft 35 is used. A source (motorized) can be used.

Therefore, as shown in FIG. 2, in the normal state, water can be taken by the water intake basin 12 disposed downstream of the sabo dam 11, and the end of the water intake basin 12 can be connected to the sleeve 13 of the sabo dam 11. Since the water has passed through the sabo dam, the water that has passed through the sabo dam naturally falls into the water intake basin 12 from the dust removal screen 21 and then flows down through the water intake basin 12 to reach the sleeve 13 of the sabo dam 11. Thus, water can be taken in via a water intake pipe (not shown).

That is, at the time of water intake, water from which dust is removed through the dust removal screen 21 flows into the water intake mode (U-type water channel) composed of the wall surface 14 of the sabo dam, the bottom plate 23 and the side plates 22 and water intake becomes possible. . At that time, the dust removing screen 21 at the top is inclined to the downstream side. Accordingly, when dust such as fallen leaves accumulates on the upper surface of the dust removing screen 21 and the water passing ability of the dust removing screen 21 decreases, water that cannot pass through the dust removing screen 21 flows along the dust removing screen 21 along the upper surface of the dust removing screen 21. Water flow is restored by sweeping away dust such as fallen leaves. It is a so-called Tyrolean screen.

On the other hand, boulders, driftwood, etc. that have flowed down during a flood pass over the dust removal screen 21. In such a case, in order to prevent damage to the water intake trough 12, the water intake trough 12 is deformed by operating the rotary arm 24 to avoid collision with running water.
That is, during a flood, when the rotary arm 24 to which the bottom plate 23 is attached is rotated around its lower end, the dust removing screen 21, the side wall 22, and the bottom plate 23 are deformed in parallel and linearly with the wall surface 14 of the sabo dam. Can avoid direct hits. In addition, the bottom plate 23 separates from the wall 14 of the sabo dam at the same time as the rotation of the rotary arm 24, and the dust such as pebbles and fine-grained soil accumulated on the bottom after passing through the water in the water channel and the dust removing screen 21. Since it will be in a state of bottoming, at that time, it flows out from the gap between the side wall 14 and the bottom plate 23 and falls to the lower water hitting.
When the flood is over, water intake can be resumed by rotating the rotating arm 24 backward from the non-water intake mode and returning the dust removing screen 21, the side wall 22 and the bottom plate 23 to the original water intake mode. Even when it is not flooding, if dust accumulates in the water channel, the rotary arm 24 is rotated to deform the U-shaped water channel, so that the dust can be dropped from the bottom of the water channel and eliminated.
Repeat the above process by automatic control and continue water intake.

Since the intake mechanism of the sabo dam of the present invention is configured as described above, the structure is simple and maintenance is easy, and the normal intake mode and the non-intake of dredging basins when flooding or clogging occurs due to earth and sand, etc. It is possible to provide a water intake mechanism for a sabo dam that can be easily switched to a form during water intake.

In addition, as long as the gist of the present invention is not impaired, the present invention can be applied to various types of dams such as dams other than sabo dams, or floor tamping works, fixed weirs, head works, and the like.

DESCRIPTION OF SYMBOLS 11 Sabo dam 12 Water intake ridge 13 Sleeve part 14 Wall surface 21 Dust removal screen 22 Side plate 23 Bottom plate 24 Rotating arm 31 1st fixed shaft 32 1st intermediate shaft 33 2nd intermediate shaft 34 3rd intermediate shaft 34a Stopper 35 2nd fixed shaft

Claims (3)

A U-shaped water channel and a deformable water intake basin are placed downstream of the sabo dam and the terminal is extended to the sleeve of the sabo dam. In the event of a flood or when sedimentation occurs at the bottom of the intake basin due to earth or sand, etc. In the water intake mechanism of the Sabo dam, where the water supply is restored to the original water intake form and the water intake is resumed,
The deformable water intake trough has a dust removing screen having one end pivotably held at the upper end of the water control downstream of the sabo dam, a side plate rotatably connected to the other end of the dust removing screen, and one end A bottom plate rotatably connected to the other end of the side plate, one end rotatably connected to the end of the deformable section of the other end of the bottom plate within a predetermined angle range, and the other end downstream of the sabo dam It consists of a rotating arm that is rotatably held using a fixed shaft on the wall of the sabo dam at a predetermined interval from the upper end on the side,
In a normal state, the side plate and the bottom plate form a U-shaped water channel by holding a rotating arm rotatably held on the wall surface of the sabo dam upward along the wall surface and supporting the bottom plate almost horizontally. In addition, a dust removing screen is arranged on the upper surface with the necessary inclination angle maintained,
When discharging floods and sediments, the dust removal screen, side plate, and bottom plate are deformed along the side wall by rotating a rotating arm rotatably held on the wall of the sabo dam downward along the side wall. And a water intake mechanism for a sabo dam, which can be shifted to a non-water intake configuration. The rotating arm and the bottom plate, which are rotatably held on the wall surface of the sabo dam using a fixed shaft, protrude outward at a predetermined angle from the upper end of the rotating arm in which the bottom plate is held upward along the side wall during water intake. The sabo dam water intake mechanism according to claim 1, wherein the sabo dam water intake mechanism is maintained. A rotating arm that is rotatably held on the wall surface of the sabo dam by using a fixed shaft extends the fixed shaft toward the sleeve direction of the sabo dam, and has a manual rotary handle or power source attached to the end thereof. 2. A water intake mechanism for a sabo dam according to claim 1, wherein the fixed shaft and the rotary arm can be rotated.

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