JPH06180009A - Automatic rising/falling dam - Google Patents

Abstract

PURPOSE:To provide an automatic rising/falling dam whose strength is large and trouble is hardly generated and which does not require any fish road, by making the upstream side dam plate and the downstream dam plate linked thereto rise/fall by driving a cylinder provided at the recessed portion of a river bed. CONSTITUTION:An upstream side dam plate 11 is turnably fitted to a support shaft 15 fixed in the width direction of a river bed. Also, a downstream side dam plate 12 is turnably connected to the upper end edge portion of the upstream side dam plate 11 through a support shaft 16, and its other end edge portion is made to slide on a rail 18 provided on the river bed. Next, a cylinder 13 is provided at a recessed portion 20 provided at the river bed between both dam plates 11, 12, and makes the upstream side plate 11 risable/fallable through a rod 13a, and also in linkage to this, makes the downstream, side dam plate 12 risable/fallable. By driving the cylinder 13 in adaptation to the flow of the river, both dam plates 11, 12 are made to rise/fall, and are positioned at a desired height.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic undulating weir for blocking running water in order to take out water from a river, drainage channel or the like.

[0002]

2. Description of the Related Art Conventionally, a gate weir, a fall weir, or a rubber weir has been provided in order to dam the running water of a river. The gate weir is shown in FIG.
As shown in Fig. 2, the partition plate 2 is arranged between the stanchions 1 and 1 so as to be able to move up and down, and if the amount of water blocked is increased, the amount of rise of the partition plate 2 is changed according to the amount of water and the water is discharged. It is supposed to do. However, in this gate weir, since the partition plate 2 to be moved up and down is formed of a steel plate so as to withstand water pressure, it is heavy and becomes difficult to move up and down if the length exceeds a predetermined length (10 m). For this reason, if the river width becomes long, a plurality of partition plates 2 are required, and in order to lift and lower each partition plate 2, it is necessary to provide an elevating device for the column 1 and the partition plate 2 between them. However,
If dust or the like flowing from the upstream side is caught on the support column 1 and positioned below the partition plate 2, smooth opening and closing thereof is hindered. Further, the lifting device for the partition plate 2 is very expensive, and the repair work in case of failure requires enormous cost. Further, since the partition plate 2 prevents fish from swimming upstream, it is necessary to provide a fishway on the riverbank.

As shown in FIG. 7, the falling weir is constructed so that a weir plate 4 is rotatably attached to a support shaft 3 fixed in the width direction of the river bed, and is made to stand and fall by driving a cylinder 5. is there. However, in this fall weir, the downstream side of the weir plate 4 has a negative pressure due to the flowing water. For this reason, sand may be sucked and accumulated on the back surface side of the barrier plate 4 to prevent it from falling.
Further, since the dam plate 4 has a structure only supported by the cylinder 5, the amount of water that can be dammed is small. For this reason, if the river width becomes wide, the columns 1 are required at predetermined intervals between the overturning weirs as in the case of the gate weirs, and the blocking of the weir plate 4 may be impossible due to clogging of dust. Further, when the weir plate 4 is upright, there is a large drop between the weir plate 4 and the water surface on the downstream side, and fish cannot swim in the upstream side. Therefore, a fish path is provided similarly to the gate weir. There is a need.

As shown in FIG. 8, the rubber weir is constructed by fixing a bag body 6 made of a flexible material to a river bed with metal fittings 7, enclosing air, water, etc. inside, standing up and discharging. It is a thing to lay down. However, at this rubber weir, the bag body 6 may be damaged by the collision of driftwood nails, hulls, boulders, glass or the like, or by tampering with a file or the like. In this case, the water that has been blocked will be discharged at once, which may lead to a serious accident if there are people fishing downstream. Further, when the running water crosses the rubber weir, the bag body 6 resonates to generate noise, so that it cannot be used in a river passing through a residential area or the like. In view of the above problems, it is an object of the present invention to provide an automatic undulating weir that is excellent in strength, does not require a fish path, and is less likely to cause problems such as dust clogging and damage.

[0005]

In order to achieve the above object, the present invention provides an upstream weir plate having one end rotatably attached to a support shaft fixed in the width direction of a river bed, and the upstream side weir plate. One end edge is rotatably connected to a support shaft provided on the other end edge of the side weir plate, and the other end edge is a downstream side weir plate that slides on the riverbed, and both weir plates are erected or erected. And driving means.

[0006]

According to the present invention, by driving the drive means in accordance with the flow rate of the river, both dam plates are rotated to stand and position at desired positions.

[0007]

Embodiments of the present invention will now be described with reference to FIGS. The automatic undulating weir shown in FIG. 1 is roughly composed of an upstream weir plate 11, a downstream weir plate 12, a cylinder 13 serving as a driving means, and a positioning device 14. The lower end edge of the upstream dam plate 11 is rotatably attached to a support shaft 15 fixed in the width direction of the river bed so as to directly dam the running water.

The downstream weir plate 12 is the upstream weir plate 1
It is rotatably connected to a support shaft 16 provided at the upper end edge of No. 1 and also plays a role of reinforcing the upstream dam plate 11. Protrusions 17 are formed at a plurality of locations on the surface of the downstream dam plate 12.
Is provided to make it easier to suck oxygen in the air by making the flowing water turbulent. Further, the lower end edge of the downstream dam plate 12 slides on a plurality of rails 18 formed on the riverbed along the flowing direction (see FIG. 2). These rails 18 are made of a material having a low frictional resistance, such as a synthetic resin material, in the shape of a rod having a quadrangular cross section, and are fixed at a position protruding from the river bed by a certain dimension. A sealing member 19 made of synthetic resin is fixed to the side edges of both the dam plates 11 and 12 to prevent water leakage to the downstream side.

The cylinder 13 includes the dam plates 11, 1
In the river bed between two, it is each arrange | positioned in each recessed part 20 formed in the width direction at predetermined intervals. A roller 13b is rotatably provided at the tip of a rod 13a of the cylinder 13, and is in contact with a concave surface 11a formed in an upper portion of the back surface of the upstream dam plate 11. When the rod 13a moves back and forth due to the driving of the cylinder 13, the upstream dam plate 11 stands up or falls.

The positioning device 14 comprises a slider 21 slidably arranged in the river width direction, and a stopper 22 which moves up and down by the movement of the slider 21. The slider 21 is a rod-shaped member having a quadrangular cross section, and is slidable in the river width direction by a cylinder 21a (see FIG. 3) arranged on the river edge side. A plurality of the sliders 21 are arranged at a predetermined pitch from a predetermined position on the upstream side to a predetermined position on the downstream side. Notched recesses 23 are formed on the upper surface of the slider 21 at the same pitch as the rails 18.
All of these notch recesses 23 are formed so as to gradually become shallower toward one end side (the right side in FIG. 3) of the slider 21.

On the other hand, the stoppers 22 are vertically movable in through holes 18a formed in the rail 18 at the positions where the sliders 21 slide. An O-ring (not shown) is fitted in the through hole 18a to prevent water from entering. The slider 21 is shown in FIG.
If the stopper 23 is moved to the left in the middle, the lower end of the stopper 23 is pushed up by the inclined surface of the cutout recess 23 of the slider 21, and the stopper 23 is moved to the right in FIG. Since it is displaced to the rail 18 due to its own weight
It descends until it becomes flush. The upper end of the stopper 22 is normally set flush with the rail 18.

In the automatic undulating weir having the above structure, when stopping running water, the cylinder 13 is driven to advance the rod 13a. As a result, the upstream dam plate 11 rotates counterclockwise in FIG. 1 about the support shaft 15. Along with this rotation, the downstream dam plate 12 rotates clockwise around the support shaft 16 so that the lower end edge slides on the rail 18. Then, the slider 21 at a predetermined position is slid to the left in FIG. 3 to raise the stopper 22. As a result, the downstream weir plate 12 is not limited to the cylinder 13,
Positioning is performed with the lower end edge supported by the stopper 22.

For this reason, the cylinder 5 is used like the fall weir.
Support strength is greater than that supported by only. Moreover, since the twist of the upstream dam 11 is reinforced by the downstream dam 12, both dams 1
Even if 1 and 12 are long, running water can be sufficiently blocked. Therefore, the conventional column is not required, and the problem caused by catching dust or the like is eliminated.

Since the amount of flowing water that is larger than that of the upstream weir plate 11 flows to the downstream side along the surface of the downstream weir plate 12, the fish on the downstream side freely moves to the upstream side without providing a fishway. can do. Moreover, when the running water moves on the surface of the downstream dam plate 12, it becomes a turbulent state due to the protrusions, and a large amount of oxygen in the air is taken in, so that the river is activated and the fish can easily live. .

As described above, the cylinder 13 is driven according to the amount of flowing water to change the standing position of the upstream dam plate 11, and the lower end edge of the downstream dam plate 12 is moved to a position corresponding to the rising position. If it is supported by the stopper 22 provided at, the damming water level can be freely changed.

When water is increased due to a typhoon or the like, the slider 21 is slid to the right in FIG. 3 to lower the stopper 22. Further, the cylinder 13 is driven to drive the rod 13a.
Retreat. As a result, the upstream weir plate 11 is supported by the support shaft 15.
While rotating in the clockwise direction about the center, the lower end edge of the downstream dam plate 12 is released from the support by the stopper 22 and slides on the rail 18 to the downstream side. Then, both the weir plates 11 and 12 contact the riverbed and are discharged. In the above embodiment, the positioning device 14 is provided and the stopper 22 supports the lower edge of the downstream dam plate 12, but the invention is not limited to this as long as the downstream dam plate 12 can be positioned. Of course not.

The automatic undulating weir shown in FIGS. 4 and 5 does not require the positioning device 14 unlike the automatic undulating weir. That is, the locking portions 23 are provided on the lower portion of the back surface of the downstream dam plate 12 at predetermined intervals in the width direction. Rollers 27 are arranged on the upstream side of each locking portion 23 on the back surface side of the upstream dam plate 11. Wires 24 locked to the locking portions 23 come into contact with the rollers 27, and the direction is changed at a substantially right angle.
Connected to 5. The winding wire 25 is a winding device 26.
Is driven to be wound up, and when this driving is released, the other end side is pulled by a spring (not shown) to be rewound.

As a result, when the winding device 26 is driven to wind the winding wire 25, the downstream dam plate 12 is pulled through the wire 25 and the upstream dam plate 11 rises to form a river. Be blocked. On the contrary, if the winding device 26 is driven to rewind the winding wire 15, the both dam plates 11,
12 is laid down and released. As described above, according to the automatic undulating weir shown in FIG. 4, it is not necessary to provide the cylinder 5 and the positioning device 14 on the riverbed, which is advantageous in that the construction is easy and the manufacturing cost is low as compared with the embodiment. is there.
In this embodiment, the lower part of the back surface of the downstream dam plate 12 is pulled by the wire 24, but the support shaft 16 may be moved up and down via the wire or the like.

[0019]

As is apparent from the above description, according to the automatic undulating weir according to the present invention, the upstream weir plate and the downstream weir plate for reinforcing the upstream weir plate are provided. The bending rigidity is improved, and the length can be increased. This eliminates the problem that the conventional columns are unnecessary and dust is accumulated and the barrier plate cannot be opened and closed.
Further, since the downstream dam plate is inclined with respect to the river bed, and the flowing water flows along the downstream dam plate, the fish will flow along the downstream dam plate without specially providing a fishway. Can move upstream.

[Brief description of drawings]

FIG. 1 is a side sectional view of an automatic undulating weir according to the present embodiment.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial cross-sectional view of FIG.

FIG. 4 is a side sectional view of an automatic undulating weir according to another embodiment.

FIG. 5 is a plan view of FIG.

FIG. 6 is a perspective view of a gate weir according to a conventional example.

FIG. 7 is a side sectional view of a fall weir according to a conventional example.

FIG. 8 is a side sectional view of a rubber weir according to a conventional example.

[Explanation of symbols]

11 ... Upstream dam plate, 12 ... Downstream dam plate, 13 ... Cylinder (driving means), 15, 16 ... Spindle.

Claims (1)

[Claims] 1. An upstream dam plate having one end edge rotatably attached to a support shaft fixed in the width direction of the river bed, and one end of a support shaft provided at the other end edge part of the upstream weir plate. A downstream weir plate in which the edges are rotatably connected and the other edges slide on the riverbed,
An automatic undulating weir provided with a drive means for raising or lowering the both weir plates.