JP2533698Y2 - Simple fishway equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple fishway device which can be installed in an existing weir without a fishway.

[0002]

2. Description of the Related Art Conventionally, dams and weirs provided in rivers are used for flood control, water use from reservoirs, and the like. recent years,
Some designed and constructed dams and weirs have fishways in place to maintain the fish ecosystem. In the fishway,
A long waterway from upstream to downstream is provided by a concrete wall, bypassing the dam and weir, and a plurality of concrete or steel plate weirs are installed in the waterway in a stepwise fashion with gradually increasing levels. There is a road. Further, as shown in FIG. 10, a fishway device 3 in which a concrete wall 2 is continuously provided with a fan-shaped step on the downstream side of the fixed weir 1 uses a concrete fixed type by utilizing the width of the river 4 at the time of construction. It is provided as.

[0003]

[Problems to be Solved by the Invention] However, in the case of an existing weir without a fishway, installation space becomes a problem when a new fishway is provided. Also, in areas with steep terrain, it is difficult to transport and assemble equipment for establishing fishways. Originally, weirs and terrain without fishways also need to be removed after assembly to protect the downstream area due to flooding and other circumstances. In addition, even if the fishway is installed, the effect may be reduced by half if the fishes do not approach the environmental change.

The present invention is easy to assemble and remove,
It is an object of the present invention to provide a simple fishway device that supports fish run-up.

[0005]

According to the present invention, in order to achieve the above object, a frame having a predetermined height is erected on a downstream side of a fixed weir, and a box-shaped central water storage block is mounted on an upper surface of the frame.
A gutter-shaped upstream fishway block is erected between the top of the fixed weir and the central storage block, and a gutter-shaped downstream fishway block and a priming waterway block are provided between the central storage block and the downstream riverbed. And are arranged side by side.

[0006] In the above configuration, each block may be provided with a partition wall, and the downstream fishway block may be formed in a sector shape having a wide frontage on the downstream side. In addition, the priming waterway block may be provided on the left and right of the downstream fishway block, or the priming waterway block may be provided at the center, and the downstream fishway block may be provided on both sides. Also, two blocks may be juxtaposed as a side wall of the downstream fishway block and the priming waterway block.

In addition, a frame having a predetermined height is erected on the downstream side of the fixed weir, and a box-shaped central water storage block is mounted on the upper surface of the frame, and between the top of the fixed weir and the central water storage block. A gutter-shaped upstream fishway block is erected, a gutter-shaped downstream fishway block is erected between the central storage block and the downstream riverbed, and priming is provided below the bottom plate of the upstream fishway block or the downstream fishway block. It is characterized by having a waterway section.

[0008]

Since the present invention is constructed as described above, the weir top is located on the extension of the slope of the downstream fishway block, and the upstream fishway block is installed between the central water storage block and the weir top. By adjusting the length, the entire length of the fishway can be easily set to a gradient that facilitates the passage of fish. In addition, since the priming waterway block is provided, a large number of fish can be guided to the outlet of the fishway block.

In addition, since the priming waterway is provided below the bottom plate of the upstream fishway block or the downstream fishway block, the number of constituent units is small, the labor is reduced, and the assembling work time can be shortened.

In addition, since a plurality of blocks are assembled and disassembled, it can be disassembled into blocks and loaded on a truck during transportation.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, in a fixed weir 1 without a fishway facility, a fishway device 3 is provided in a river 4 downstream of the fixed weir 1. Actually, in the case of existing weirs, head works, dams with low bank height, etc., where the water level difference between the upstream and downstream is relatively small, use fishway equipment when newly remodeling concrete structures such as weir bodies. It is assumed that.

A riverbed 5 downstream of the fixed weir 1 is made of a concrete surface, a frame 6 is fixed by bolts 7, and a box-shaped central water storage block 8 is fixed to the upper surface of the frame 6 via a sleeper 9. A gutter-shaped upstream fishway block 12 connected to the central water storage block 8 by a bellows member 10 and connected by a hinge 11 has its upstream end mounted on the cutout portion 1a of the fixed weir 1.
Watertight rubber 13 is attached to this notch 1a to prevent water leakage. Similarly, the bellows member is attached to the central water storage block 8.
A gutter-shaped downstream fishway block 14 connected by a hinge 11 and connected at 10 has its downstream end fixed to the riverbed 5. And
Vertical bulkheads 15 are arranged at regular intervals over the entire length of the fishway, and the position of the frame 6 is provided at a position where the gradient of the upstream fishway block 12 matches the conditions of the fishway according to the weir height. The length of the upstream fishway block 12 when the adjustment block 16
It is matched with.

The downstream fishway block 14 is inclined from the central water storage block 8 toward the riverbed 5, and the width of the flow passage increases toward the downstream, forming a fan shape. A gutter-shaped priming waterway block is provided on the left and right of the downstream fishway block 14.
17 are juxtaposed. The upper end of the priming waterway block 17 is connected to the central water storage block 8 by a bellows member 10 and connected by a hinge 11, the lower end is provided with a stop plate 18 on the front side, and a notch 19 is provided on the inner side, and a bolt 20 is provided. Fixed at.
The priming waterway block 17 generates a difference between the flow velocity and the water temperature of the downstream fishway block 14, thereby stimulating the running performance and the running performance of the fish and promoting the run-up.

Next, the attachment to and removal from the fixed weir 1 will be described. When performing the mounting work, first, the frame 6 and the central water storage block 8 are fixed at the planned positions. Next, while the downstream fishway block 14 is hung by a crane, the downstream fishway block side hinge is fitted into the central water storage block side hinge, and a rotating pin is inserted to form and connect the hinge 11. Thereafter, the lower end of the downstream fishway block 14 is fixed, and the bellows member 10 is attached between the central water storage block 8 and the downstream fishway block 14.

The upstream fishway block 12 is attached to the downstream central water storage block 8 first, and finally the end of the upstream fishway block 12 is attached to the notch 1a at the top of the weir, and the watertight rubber Place 13 to prevent water leakage. After that, use the same mounting procedure as the left and right
Install 17. Also, the removal operation may be performed in the reverse of the above procedure.

As described above, the assembling can be performed on the fixed weir 1 by sequentially assembling, and the transportation to remote areas can be facilitated by further dividing the block in the waterway direction. Can be installed. In addition, since the fishes are guided to the lower side of the downstream fishway block 14 by the priming waterway block 17, it is possible to support the run-up.

FIG. 4 shows a priming waterway block 17.
Are arranged in the center, and downstream fishway blocks 14 are provided on both sides. In addition, the fishway block and the priming waterway block 17 are provided side-by-side as the side walls of the two blocks, whereby the structure is simplified and the installation can be facilitated. Also, the structure shown in FIG. 1 can also be used as a side wall to reduce the number of components and simplify assembly.

Next, the priming waterway is connected to the upstream fishway block.
The case where it is installed together with 12 will be described with reference to FIGS. A bottom plate of the upstream fishway block 12 is double-structured, and a priming water channel portion 24 in which an upstream intake port 22 is widened and a downstream drain port 23 is narrowed by a side plate 21 partitioning the inside in a divided lower space. Are formed. In addition, intake 22
The screen 25 is attached to the drain port 23. In addition, the upstream fishway block 12 has a straightening plate 26 on the side plate at the upstream end.
And the flow water inlet is expanded, and the notch at the top of the weir is
1a is shaped along this. The partition 15 is fixed to the upper bottom plate. In addition, priming waterway
Although the drainage ports 24 are arranged at both edges of the downstream mouth of the upstream fishway block 12, they can be arranged at one side or at the center if it is easy to go up fish.

Next, the priming waterway is connected to the downstream fishway block.
The case where it is installed together with 14 will be described with reference to FIGS. This is a double configuration of a bottom plate formed in a fan shape like the above-mentioned upstream fishway block 12, and the upstream intake 22 is widened by the side plate 21 partitioning the inside, and the downstream drain 23 is formed. A narrowed priming channel 24 is formed. At the downstream end of the priming water channel portion 24, a cutout portion 19 is provided inside so as to interfere with the mainstream of the fishway.
In addition, since the top of the partition wall 15 of the downstream fishway block 14 is longer as it is located on the downstream side, the flow velocity becomes slower on the downstream side when the flow rate of flowing water is constant. Therefore, the notch 15a is provided in the partition wall 15 on the downstream side to secure the flow velocity. The notch 15a may be formed in the partition wall 15 of the downstream fishway block 14 shown in FIG. Although the upstream fishway block 12 and the downstream fishway block 14 provided with the priming waterway section 24 have been described separately, a fishway can be installed in combination when used.

[0020]

[Effect of the Invention] Since the present invention is constructed as described above, it can be easily installed on a weir without a fishway facility, and it is useful because fish can be guided by a priming waterway block. In addition, it can be transported to remote and remote places, and can be installed in weirs in various places. The structure is simple and the equipment cost is low, so that the degree of use is large. In addition, it is easy to remove, and if it is removed during a flood, it will not obstruct the flow of the river, and it can be installed only during the upstream and downstream of fish.

[Brief description of the drawings]

FIG. 1 is a plan view of a simplified fishway device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the simplified fishway device shown in FIG.

FIG. 3 is a side view showing a priming waterway block on the side of the simple fishway device shown in FIG. 1;

FIG. 4 is a plan view of a main part of a simplified fishway device according to another embodiment.

FIG. 5 is a side view of an upstream fishway block provided with a priming waterway according to another embodiment.

FIG. 6 is a plan view of what is shown in FIG.

FIG. 7 is a front view of a main part of a downstream fishway block provided with a priming waterway section of another embodiment.

FIG. 8 is a plan view of a downstream fishway block provided with the priming waterway shown in FIG. 7;

9 is a side view of a downstream fishway block provided with the priming waterway shown in FIG. 7;

FIG. 10 is a perspective view of a conventional fixed fishway device.

[Explanation of symbols]

 1 fixed weir 5 riverbed 6 frame 8 central storage block 12 upstream fishway block 14 downstream fishway block 17 priming waterway block 24 priming waterway

Claims (2)

(57) [Scope of request for utility model registration] 1. A frame having a predetermined height is erected on a downstream side of a fixed weir, and a box-shaped central water storage block is mounted on an upper surface of the frame.
A gutter-shaped upstream fishway block is erected between the top of the fixed weir and the central storage block, and a gutter-shaped downstream fishway block and a priming waterway block are provided between the central storage block and the downstream riverbed. A simple fishway device characterized by the fact that they are arranged side by side. 2. A frame having a predetermined height is erected on the downstream side of the fixed weir, and a box-shaped central water storage block is mounted on an upper surface of the frame.
A gutter-shaped upstream fishway block is erected between the top of the fixed weir and the central storage block, and a gutter-shaped downstream fishway block is erected between the central storage block and the downstream riverbed. A simple fishway device, wherein a priming waterway portion is provided below the bottom plate of the upstream fishway block or the downstream fishway block.