JP2614177B2 - Lockhouse type fishway equipment for dams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lockhouse type fishway facility for dams, which transports upstream fish from a downstream river to a dam reservoir.

[0002]

2. Description of the Related Art When a dam is constructed in a river, it becomes an obstacle for fish to run up. Therefore, for those that will affect the natural environment of the river, fishways will be provided in the dam to preserve the river ecosystem.

[0003] In a fishway facility provided in a dam, a fish outlet for discharging fish to the dam reservoir must correspond to fluctuations in the water level of the reservoir. A multi-stage gate 1 having a high lift as shown in FIG. 11 and a perforated gate 2 having gates at a plurality of fish outlets as shown in FIG. 12 are provided. In addition, a guide for guiding fish is provided in a sloping shaft 5 which communicates a vertical shaft 4 in the fishway tower provided in a protruding shape on the upstream side of the dam embankment 3 and a fish collecting facility provided on the downstream side of the dam embankment 3. Light 6
(Japanese Patent Publication No. 3-23687). 7 in FIGS. 11 and 12 is the gate 1 or 2
Is a winch for raising and lowering.

[0004]

However, in the above-mentioned conventional lockhouse type fishway facility for a dam as described above, the difference between the water level in the fishway tower and the water level in the reservoir is detected and the gate provided at the fish outlet is detected. Opening and closing operation must be performed. In addition, it is necessary to detect the water level in the shaft or the shaft, and to sequentially control the lighting of the guide lights according to the water level.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the conventional lockhouse type fishway equipment for dams, and is a fishway in which complicated operation of gates and guide lights can be omitted as much as possible. The purpose is to provide facilities.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a lockhouse type fishway system for a dam according to the present invention is provided. In the lockhouse-type fishway facility to guide the water, a float-type guide light that moves up and down automatically following the water level in the shaft is installed in the shaft provided on the upstream side of the dam, and the reservoir is located on the side wall of the reservoir. Open a slit for fish release according to the water level fluctuation, and in this slit, at the line symmetrical position so that the guide surface faces the back of the left and right door bodies, and the relative distance of the guide surface becomes narrower as going upward. Such a guide rail is provided, and a miter gate provided with a float that is guided by the guide rail according to the water level difference between inside and outside of the door and moves up and down to open and close the left and right doors is installed.

[0007]

In the lock lock type fishway equipment for a dam of the present invention having the above-described structure, the fish guided into the shaft is guided by the float type guide light which automatically rises and follows the water level in the shaft. Go up the shaft. When the water level in the pit and the water level in the reservoir are balanced, the left and right doors are automatically opened by the buoyancy of the float, and the fish escapes to the reservoir.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lockhouse type fishway facility for a dam according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a side view showing a cross section of the entirety of the lockhouse type fishway for a dam of the present invention, and FIG. 2 is a view of a closed state of a miter gate which is a component of the lockhouse type fishway for a dam of the present invention. FIG. 3B is a side view, FIG. 3B is a plan view of FIG. 3A, and FIG. 3B is a view of the miter gate in an open state, FIG. 3A is a side view, FIG.
FIG. 10 to FIG. 10 are diagrams for sequentially explaining the operation procedure of the lockhouse type fishway for the dam of the present invention.

1 to 3, reference numeral 11 denotes a dam embankment, 1
Reference numeral 2 denotes a reservoir on the upstream side of the dam, and reference numeral 13 denotes a stepped fishway provided on the downstream side of the dam. Body 11
The pit 14 is provided on the upstream side of the pit, and the shutoff gates 15a and 15b are provided at the entrances and exits thereof, which are also provided on the downstream side of the pit 14 and the stepped fishway 13.
5c, a pit 14 and a pit 15
Is transported to the reservoir 12 using the inclined shaft 16 which communicates with the fish, and the fish is released therefrom, and is configured as follows. Note that 15
d indicates an air valve.

The pit 14 is provided with a float type guide light 18 which is guided by a guide rail 17 and moves up and down automatically according to the water level in the pit 14. A fish release slit is opened so that water from the reservoir 12 can enter therein even when the water level is at the lowest level, and the door body 21a is formed in this slit by the action of the float 19 with the rotating hinge 20 as a fulcrum. A miter gate 22 having the following configuration is provided so that 21b is opened and closed like a double door.

Reference numeral 23 denotes a guide rail disposed on the back of the left and right door bodies 21a and 21b at a line symmetrical position so that the respective guide surfaces 23a and 23b face each other. These guide surfaces 23a and 23b At the lower limit position, as shown in FIG. 2 (b), they oppose each other in the fully closed state, and the relative interval becomes narrower upward from the lower limit position, and gradually becomes curved in a plan view. Then, at the upper limit position, as shown in FIG. 3 (b), they are formed so as to face each other in the fully opened state.

On both sides of the float 19, guide rollers 24 are rotatably pivotally mounted.
2 (b), the guide roller 24 is made to be equal to the distance between the two guide surfaces 23a and 23b in the fully closed state, and these guide rollers 24 are raised by the buoyancy of the float 19 so that the guide surfaces 23a .Door body 2 by force pressing 23b
This is an operation for opening 1a and 21b. Reference numeral 25 denotes a guide roller rotatably provided on both sides of the float 19, and this guide roller 25 is for maintaining the relative positional relationship between the float 19 and the doors 21a and 21b.

In FIG. 1, reference numeral 26 denotes a water filling pipe which is opened in the dam body 11 so as to connect the fish tank 15 with the reservoir 12.
Reference numeral 27 denotes a water filling pipe connecting the inclined shaft 16 and the fish collecting tank 15, and 28 denotes a drain pipe connecting the fish collecting tank 15 and the stepped fish passage 13.
Filling valves 29, 30 and a drain valve 31 are interposed in the middle of the filling pipes 26, 27 and the drain pipe 28, respectively. Needless to say, guide lights 32 are provided at predetermined intervals on the ceilings of the fish collecting tank 15 and the inclined shaft 16.

The lockhouse-type fishway equipment for a dam of the present invention has the above-described configuration. Next, using the fishway equipment, a step-type fishway 13 provided on the downstream side of the dam to a reservoir 12 upstream of the dam are used. A method of transporting the upstream fish will be described step by step with reference to FIGS.

First, the water filling valve 29 is opened with the cut-off gate 15a on the inlet side of the fish collecting tank 15 being opened, and the fish collecting tank 1 is opened.
The water overflows from the exit of No. 5, and the upstream fish is called into the fish collecting tank 15 (see FIG. 4). After the upstream fish is called into the fish collecting tank 15, the closing gate 15a provided at the entrance is closed. Then, the water level in the fish collecting tank 15 rises along the inclined shaft 16, and the rising fish rises in the inclined shaft 16 by being guided by the guide lights 32 which are sequentially turned on as the water level rises (see FIG. 5). Finally, it is led into the shaft 14.

Further, as the water level in the pit 14 rises, the float type guide light 18 is also guided by the guide rails 17 and rises, and the upstream fish also rises in the pit 14 together (see FIG. 6). . At this time, as the water level in the pit 14 rises, the difference between the water level in the pit 14 and the water level in the reservoir 12 gradually decreases, and the float 19 is submerged and the float 19
The buoyancy generated in the float 19 causes a rotational moment to act on each of the left and right doors 21a and 21b. And the water level in the shaft 14 and the reservoir 1
By the time the water level of 2 is balanced, the float 19 starts moving diagonally upward along the guide surfaces 23a and 23b of the guide rail 23, opens the miter gate 22, and the upstream fish can escape to the reservoir 12 ( (See FIG. 7).

Next, when the upstream fish escapes to the reservoir 12, the closing gate 15b provided at the outlet of the fish collecting tank 15 is closed, and then the drain valve 31 is opened to lower the water level in the fish collecting tank 15 (FIG. 8). Then, when the water level in the fish collecting tank 15 decreases, the shutoff gate 15a provided at the entrance and the water filling valve 30 are opened, and the water in the shaft 14 and the inclined shaft 16 is discharged into the fish collecting tank 15. With this discharge, the miter gate 22 automatically closes in the opposite manner as described above, and the shaft 14 and the shaft 16 are closed.
The water level inside falls. During this time, water flows from the fish collecting tank 15 to the stepped fish path 13, so that the fish goes up into the fish collecting tank 15 (see FIG. 9).

Finally, when the water in the shaft 14 and the shaft 16 runs out, the shutoff gate 15b provided at the outlet is opened, the water filling valve 30 is closed, and then the water filling valve 29 is opened. Return to step.

[0019]

As described above, in the lockhouse type fishway equipment for a dam according to the present invention, since the gate installed at the fish outlet is a non-powered type, a winch for raising and lowering the gate is not required, and the shaft is not pitted. There is no need to detect the difference in water level between the inside and outside. In addition, since the guide light installed in the shaft is of a float type that automatically rises and moves following the water level in the shaft, there is no need to detect the water level in the shaft. That is, according to the present invention, complicated operation of gates and guide lights as in the conventional lockhouse type fishway equipment for dams can be omitted as much as possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view schematically showing the whole lock chamber type fishway for a dam of the present invention.

FIGS. 2A and 2B are diagrams showing a closed state of a miter gate which is a component of a lockhouse type fishway for a dam of the present invention, wherein FIG. 2A is a side view and FIG. 2B is a plan view of FIG.

3A and 3B are diagrams illustrating the miter gate in an open state, wherein FIG. 3A is a side view and FIG. 3B is a plan view of FIG.

FIG. 4 is a view for explaining the operation procedure of the lockhouse type fishway for dams of the present invention.

FIG. 5 is a view for explaining the operation procedure of the lockhouse type fishway for the dam of the present invention.

FIG. 6 is a diagram for explaining an operation procedure of the lock chamber type fishway for a dam according to the present invention.

FIG. 7 is a view for explaining the operation procedure of the lockhouse type fishway for the dam of the present invention.

FIG. 8 is a view for explaining an operation procedure of the lockhouse type fishway for the dam of the present invention.

FIG. 9 is a diagram for explaining the operation procedure of the lockhouse type fishway for the dam of the present invention.

FIG. 10 is a view for explaining an operation procedure of the lockhouse type fishway for the dam of the present invention.

FIG. 11 is an explanatory view of a high-lift multistage gate installed at a fish outlet of a conventional lockhouse type fishway for dams.

FIG. 12 is an explanatory view of a perforated gate installed at a fish outlet of a conventional lockhouse type fishway for dams.

[Explanation of symbols]

 11 Dam embankment 12 Reservoir 14 Vertical shaft 18 Float guide light 19 Float 21a Door 21b Door 22 Miter gate 23 Guide rail 23a Guide surface 23b Guide surface

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshihiro Utsu 5-3-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Within Hitachi Zosen Corporation (56) References JP-A-61-216211 (JP, A) Kaihei 3-89735 (JP, U)

Claims (1)

(57) [Claims] 1. A lockhouse-type fishway system for guiding run-up fish to a dam reservoir by charging and discharging a lockhouse provided in a dam embankment, and following a water level in the shaft in a shaft provided on an upstream side of the dam. In addition to installing a float type guide light that moves up and down automatically, a slit for fish release according to the water level fluctuation of the reservoir is opened on the side wall of the reservoir of this shaft, and this slit is provided on the back of the left and right doors respectively. A guide rail is arranged at a line symmetrical position so that the guide surfaces are opposed to each other, and the relative distance between the guide surfaces is reduced as going upward, and the guide rail is guided by the guide rail according to the water level difference inside and outside the door. A lockhouse type fishway facility for dams, which has a miter gate with a float that moves up and down to open and close the left and right doors.