JPH083170B2 - Discharge facilities such as dams - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hydroelectric power generation, water supply reservoirs, irrigation reservoirs, and other discharge facilities such as dams constructed in rivers for purposes such as erosion control and water utilization.

[0002]

2. Description of the Related Art It has been practiced for a long time to block water from rivers with water dams for various purposes and to use water, but recently, the construction of such dams damages the ecosystem of the natural world. It is obliged to discharge a constant flow rate at all times because of the fear that there is a risk. In this case, the water level that is blocked by the weir (hereinafter referred to as "water intake level") constantly fluctuates depending on the amount of water used and the amount of precipitation in the upstream. Had control. As shown in FIG. 4, this multi-stage flap gate is constructed by simultaneously operating a number of flap gates (b) that are tiltable by pivotally attaching the lower end to the bottom of the discharge channel (a) according to the water level. Has been done. The flap gates (b) are adjacent to each other and are linked to each other near the upper end of the flap gates. The flap gates (b) have appropriate power equipment (not shown) controlled and driven by a water level gauge (not shown) that detects the water intake level. ) Is linked to.

[0003]

The conventional flow rate control by the flap gate (b) requires a water level gauge for detecting the water intake level, and the upper end of the flap gate (b) is located at a position corresponding to the water level. Power equipment was needed to adjust to.

An object of the present invention is to provide a discharge facility such as a dam which can control the flow rate without the need for the water level gauge and the power facility.

[0005]

To achieve the above object, the present invention is provided with a shutter divider plate which is vertically divided into a plurality of parts and which are pivotally mounted so as to be openable and closable respectively.
A plurality of shutter gates, which are arranged at appropriate intervals along the drainage channel such as a dam, and whose uppermost surface position is set stepwise downward toward the downstream, and are installed for each shutter gate,
It consists of a floating body connected to each shutter partition plate via an opening / closing shaft, and the buoyancy of the floating body allows the shutter partition plate of each shutter gate to follow the change in the intake level of a dam etc. via the opening / closing shaft to control opening and closing. It is what you have done.

[0006]

With the above-mentioned means, the discharge facility of the present invention catches the change in the water intake level of a dam or the like with the floating body, and controls the shutter division plate of each shutter gate to open and close via the open / close shaft to keep the water discharge constant. be able to.

Since each shutter gate is divided into a plurality of shutter division plates, it is possible to reduce the water flow resistance and to smoothly open and close the gate by the buoyancy of the floating body.

[0008]

1 is a schematic side view of a discharge facility according to the present invention,
2A is a schematic front view of the discharge facility according to the present invention, FIG. 2B is an enlarged vertical side view of a main part of the shutter gate according to the present invention, and FIG. 3 is a perspective view of the main part of the shutter gate. Therefore, in these figures, (1) shows a discharge channel, (2) shows a shutter gate, (3) shows a floating body, (4) shows an opening / closing shaft, and (5) shows a fishway opening.

The water discharge channel (1) is formed beside a dam such as a dam and always discharges water.

The shutter gate (2) is a discharge channel (1).
Are arranged at appropriate intervals, for example, at equal intervals, and the upper surface position is set lower stepwise toward the downstream. Each shutter gate (2) is provided with a plurality of shutter dividers (2a) divided in the vertical direction, and each shutter divider (2a) has a lower end suitable for a hinge means (2b) for a supporting girder (2b). The support girders (2b) are rotatably pivoted through 6) so that they can be opened and closed.

The floating body (3) is provided with each shutter gate (2).
The shutter partition plate (2a) is installed in each shutter gate (2a) via the opening / closing shaft (4), and the shutter partition plate (2) of each shutter gate (2) via the opening / closing shaft (4) by the buoyancy of the floating body (3). 2a) is for controlling opening and closing by following changes in the intake level of dams. The structure of the floating body (3) is not particularly limited, and is, for example, a hollow body, or
A material having a lower specific gravity than water may be used as a solid body.

The open / close shaft (4) is suspended from and supported by the floating body (3) at its upper end, and is connected to the upper end of each shutter divider plate (2a) via a pin (7). As a result, in each shutter partition plate (2a), the floating body (3) moves up and down according to the change in the intake level of the dam, etc.
Opening and closing operations are performed simultaneously via the opening and closing shaft (4).

The fishway opening (5) is formed on a part of the shutter gate (2), that is, on the lower side in the illustrated example. The fishway opening (5) is kept open at all times and enables fish to run upstream.

The discharge facility of the present invention is constructed as described above. First, as shown in FIG. 1, it is assumed that the water intake level fluctuates within a fluctuation range (L), and if the water discharge level is constant, the fluctuation range is the same. It is assumed that each shutter divider plate (2a) of the shutter gate (2) is set to be fully opened at the water level when (L) is the minimum value. Further, the installation interval of each shutter gate (2) is, for example, 1.2 m, and the uppermost position of each shutter gate (2) is set so as to be lowered stepwise toward the downstream side. 2) The water level difference between (2) is set to 0.1 m in the case of fishways, and larger for irrigation.

Next, the operation of the discharge facility of the present invention will be described. When the water intake level is high, the floating body (3) is in the upper position due to buoyancy, and each shutter divider plate (2a) of the shutter gate (2) is in the closed position. At this time, the flow occurs only in the fishway opening (5) below each shutter gate (2), and a water level difference occurs between the shutter gates (2) and (2) according to the flow rate. When the water intake level becomes low, it descends in descending order of the water level from the most upstream floating body (3), the shutter divider plate (2a) is opened, and the discharge water amount becomes constant according to the water level decrease condition. To control. That is, water flows from both the fishway opening (5) below the shutter gate (2) and the open gap of the shutter divider plate (2a), and the water level difference between the shutter gates (2) and (2) is reduced. . When the water intake level drops to the water discharge level, the shutter partition plates (2a) of the shutter gates (2) are fully opened, and the water level difference between the shutter gates (2) and (2) disappears. As the water intake level recovers, the floating body (3) rises and each shutter divider plate (2a) of each shutter gate (2) is rotated in the closing direction to collect the discharged water amount according to the recovery condition of the water level. Control to constant.

[0016]

According to the present invention, a change in water intake level of a dam or the like can be grasped by a floating body, and the shutter division plate of each shutter gate can be opened / closed via an opening / closing shaft to maintain a constant water discharge amount. Since it does not require a water level gauge or power equipment, it does not require operating costs and can save energy.

[Brief description of drawings]

FIG. 1 is a schematic side view of a discharge facility according to the present invention.

FIG. 2 (A) is a schematic front view of a discharge facility according to the present invention,
FIG. 3B is an enlarged vertical side view of the main part of the shutter gate according to the present invention.

FIG. 3 is an enlarged perspective view of a main part of a shutter gate according to the present invention.

FIG. 4 is a schematic side view of a conventional discharge facility.

[Explanation of symbols]

 1 Drainage channel 2 Shutter gate 2a Shutter partition plate 3 Floating body 4 Opening / closing shaft 5 Fishway opening

Claims (1)

[Claims] 1. A shutter partition plate which is vertically divided into a plurality of parts and which is pivotally mounted so as to be openable and closable, respectively,
A plurality of shutter gates that are arranged at appropriate intervals along the drainage channel of a dam, etc., and the top surface position is set lower stepwise toward the downstream, and installed at each shutter gate, and via the opening / closing shaft A dam comprising a floating body connected to each shutter partition plate, and the shutter partition plate of each shutter gate is controlled by the buoyancy of the floating body through an opening / closing shaft so as to follow the change in the intake level of the dam or the like. Discharge equipment such as.