JP2577713Y2 - Fishway using drum type flow control equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is based on the idea that a part of the power associated with the undulating rotation of a hollow drum type dam for adjusting the flow rate of water in a fishway depends on the buoyancy of the dam and the main power. The present invention relates to a fishway using a drum-type flow rate adjusting device designed to reduce the load on the rotary drive device.

[0002]

2. Description of the Related Art There have been various definitions of fishways since ancient times. In recent years, however, there has been a description of "weirs that are provided across rivers and hinder the movement of fish, Reducing the obstacles to structures such as head works and dams,
Waterways or devices installed for removal ".

[0003] The flow control equipment in the fishway is
When the upstream and downstream water levels of a river structure fluctuate, the amount of water flowing down the fishway changes, so that it accurately follows the water level fluctuations for the purpose of accurately grasping the discharge from the river structure and maintaining the biological environment. Equipment such as gates.

[0004] Such a flow control device which has been generally employed is, for example, shown in FIG. 3 or FIG.
It was an undulating gate as shown in FIG. That is, in the structure shown in FIG. 3, a gate door body b which is rotatably arranged in the transverse direction of the fishway main body a while maintaining a constant interval in the longitudinal direction of the fishway main body a is connected to a connecting rod c as shown in FIG. By connecting the wire d and the wire d to the winch e, the winch e is operated, and the gate door b is raised and lowered, and as shown in FIG. A link f is arranged on the rotation axis of each gate door b, and these links f are connected to a rod g and a hydraulic cylinder h so that the gate door b is raised and lowered. .

[0005]

As the flow control equipment using the undulating gate as described above, both a downstream undulating type and an upstream undulating type have been developed, but the principle is basically the same. The power for raising and lowering the gate door body b is the winch e and the hydraulic cylinder h as described above. The gate door body b extends in the direction crossing the fishway main body a. , The water pressure flowing down the fishway main body a must be subjected to the pressure of the water, so that the rotation of the gate door body b is performed against the water pressure, and the winch e Alternatively, the hydraulic cylinder h is not only required to have a large output, but may not operate smoothly depending on the hydraulic pressure.

[0006]

In order to solve the above-mentioned problems, a fishway using the drum type flow control device according to the present invention is provided at the bottom of a fishway body having a substantially U-shaped cross section.
A recess having a curved bottom is formed so as to traverse the fishway main body, and a dam formed by a substantially semi-cylindrical hollow drum is rotatably disposed while engaging in the recess, and the hollow drum is provided. The rotary shaft of the bank formed by the above is connected to a rotary drive device.

[0007]

In other words, when adjusting the flow rate of water in the fishway main body, the rotary drive device is operated to rotate the dam formed by the hollow drum. At this time, the buoyancy of the hollow dam is utilized. Thus, the rotation drive device can be driven by a small output.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fishway using a drum type flow control device according to the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a fishway main body having a substantially U-shaped cross section. Is a recess formed in the bottom of the fishway main body 1. The recess 2 has a curved bottom and is formed so as to cross the bottom of the fishway main body 1.

Reference numeral 3 denotes a bank which is rotatably disposed while engaging with the recess 2. The bank 3 is formed by a substantially semi-cylindrical hollow drum as shown in the figure.

The dam 3 is supported on both side walls of the fishway main body 1 and a hydraulic motor 5
(Rotary drive).

In order to rotate the bank 3 by operating the individual hydraulic motors 5,
It can be done in either direction, but in this case,
Since the dam 3 is formed by a hollow, substantially semi-cylindrical drum, a large buoyancy is generated on the side with a large space, so that the buoyancy acts synergistically with the driving force of the hydraulic motor 5, and the hydraulic motor 5 It is possible to rotate without increasing the output.

Therefore, the dam 3 functions as a partition wall in a general vertical slot type fishway, and a pool P is formed between the dams 3 so that the overflow depth of the dam 3 can be adjusted.

The individual hydraulic motors 5 in the present invention
It is of course possible to operate the hydraulic motor 5 individually by observing the water depth. For example, a water level gauge (not shown) is connected to these hydraulic motors 5 so that the water level in the pool P is equal to the planned water level. In this case, it is possible to open and close the valve by the water level meter according to the change in the height, and automation can be achieved by using this means.

[0014] In addition, regardless of the type of the conventional fishway,
All were built in rivers or embankments, and once built, could not be moved. Also, the fishway according to the invention described above can be similarly constructed. However, when constructed immovably in this way, as in the past, sediment or driftwood contained in the water flowing over the weir or the like accumulates on the fishway, or temporarily accumulates on the fishway. If not, they can accumulate on the riverbed and cause changes in the flow regime that form the entrance of the fishway, thus making fishway management difficult.

In order to make the structure movable, a gantry 6 is used as shown in FIG. That is, the gantry 6 is formed in a slope shape by a frame having a stepped fishway block receiving portion 7 formed on the upper surface, and the gantry 6 is different in height from each other, for example, by the frame itself or the legs 8. Prepare three units. In other words, these three mounts 6 are arranged in a zigzag shape in plan view and side view, and the highest slope of the center mount 6b is the lowest slope of one mount 6a, and the lowest slope of the mount 6b is the other. The height of the slope of the pedestal 6c on the side of the side is not substantially the same as the height of the slope, and the portions of the heights which are substantially the same, that is, the ends are connected by the small fishway block 9, and the remaining fishway block receiving portions 7 are provided. Is fitted with a fishway block 10 made of concrete or steel and formed in a short block shape, thereby forming a zigzag fishway that is continuous as a whole.

The specific height of the gantry 6 is determined by, for example, the adjustment jack 11 provided on the leg 8, and the number of gantry 6 is not limited to the three.

The gantry 6 is movably installed on the riverbed, so that the gantry 6 can be moved together with the fishway block 10 fitted.

[0018]

As described above, according to the fishway using the drum type flow control device according to the present invention, the concave portion having a curved bottom is formed at the bottom of the fishway main body having a substantially U-shaped cross section. The dam is formed so as to cross the fishway main body, and a dam formed by a substantially semi-cylindrical hollow drum is rotatably disposed while engaging in the recess, and the rotation axis of the dam formed by the hollow drum is rotated. When the flow rate of the water in the fishway main body is adjusted, the rotary drive device is operated to rotate the dam formed by the hollow drum. Utilizing the buoyancy of the above, the rotary driving device has an effect that it can be driven with a small output.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a fishway using a drum-type flow control device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view showing a conventional example.

FIG. 4 is a sectional view showing a conventional example.

FIG. 5 is a plan view showing a state in which three frames are arranged in a zigzag pattern.

FIG. 6 is a front view showing a state in which three frames are arranged in a zigzag shape.

FIG. 7 is a side view showing a state in which three frames are arranged in a zigzag pattern.

FIG. 8 shows an embodiment of a gantry, of which (1)
Is a front view of the gantry 6a, (2) is a front view of the gantry 6b,
(3) is a front view of the gantry 6c.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fishway main body 2 Concavity 3 Dam 4 Rotation axis 5 Hydraulic motor 6 Mount 6a Mount 6b Mount 6c Mount 7 Fishway block receiving part 8 Leg 9 Small fishway block 10 Fishway block 11 Adjustment jack P Pool

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E02B 8/08 E02B 7/40-7/42

Claims (1)

(57) [Scope of request for utility model registration] 1. A recess having a curved bottom is formed at the bottom of a fishway main body having a substantially U-shaped cross section so as to cross the fishway main body, and a dam formed by a substantially semi-cylindrical hollow drum is provided. A fishway using a drum-type flow rate adjusting device, wherein the fishway is provided so as to be rotatable while engaging in the recess, and a rotation shaft of a bank formed by the hollow drum is connected to a rotary drive device.