JPH073754A - Fishway gate - Google Patents

Abstract

PURPOSE:To simplify the structure of a fishway gate, to eliminate the need for motive power, to simplify civil engineering work, to reduce the construction cost of the gate, and to simplify maintenance and control of the gate. CONSTITUTION:In a fishway gate having an overflow type gate main body 10 suited for the going upstream of fishes and provided upstream of a plurality of bulkheads 3 in such a manner as to freely rise and fall, the bulkheads 3 being provided on the bottom portion 2 of a water channel 1 at intervals along the direction of water flow, a float 11 is integrally and rigidly connected to the gate main body 10. The float 11 is passed through guide poles 7, 8 erected on the channel bottom portion 2 and is supported in such a manner as to freely make vertical motion, and the gate main body 10 and the float 11 are automatically raised and lowered following fluctuations in upstream water level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishway gate which is provided in a dam, a river, a waterway or the like and allows fish between water surfaces to run upstream.

[0002]

2. Description of the Related Art Generally, when a water gate is installed in a river or waterway to stop upstream water, a low partition wall is provided at a predetermined interval at the bottom of the waterway in order to help fish ascend upstream. A fishway with an undulating gate is constructed near the upstream side of the partition wall. Conventionally, fishways with large fluctuations in water level are generally equipped with a large-scale gate facility and a drive device that interlocks each undulating gate (see, for example, Japanese Utility Model Publication No. 60-32196).

[0003]

However, in the above-mentioned prior art, there is a problem that a driving device such as a hydraulic cylinder and the water level detection / control means for interlocking each undulating gate to undulate by following the water level are indispensable. It was The present invention has been made in view of the above circumstances, and an object thereof is to eliminate the need for a drive device such as a hydraulic cylinder and a water level detection / control means, which has a simple structure and facilitates civil engineering work. Moreover, there is a need to provide a fishway gate that is easy to maintain and can reduce construction costs.

[0004]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is a fishway gate in which a overflow gate main body suitable for fish run-up is provided on the upstream side of a plurality of partition walls provided at arbitrary intervals in the water flow direction at the bottom of a waterway etc. There is a float integrally connected to the gate main body, and the float or gate main body is supported by a guide column standing upright at the bottom of a waterway or the like so that it can move up and down, and the float and gate main body follow the fluctuation of the water level. The feature is that it is configured to automatically move up and down.

Further, according to the present invention, two guide struts are erected in the upstream and downstream directions at the center of the waterway width direction, a non-overflow float is provided at the center of the waterway width direction, and the guide pierces pass through the float. It is characterized in that the float is supported and guided by the guide column via a guide roller.

[0006]

According to the present invention, the gate main body is driven by the buoyant force of the float that follows the fluctuation of the water level and moves up and down with the guide strut as a guide, and moves up and down, and the upstream water overflows the top of the gate main body following the water level. , A certain overflow water depth is secured, which facilitates fish run-up.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawing, (1) is a fishway channel, its channel bottom (2) is substantially flat, and a plurality of partition walls (3) are provided at predetermined intervals in the water flow direction, and the downstream side of the downstream partition wall (3). Fixed weirs (4) are provided at arbitrary intervals. The partition walls (3) are made of steel or concrete and have the same height, and the fixed dam (4) is considerably higher than the partition wall (3).

In addition, submerged holes (5) and (6) are provided in the lower portions of the partition wall (3) and the fixed weir (4), respectively, and the water channel bottom (2)
It is designed so that fish that go up along the line can easily go up. Guide struts (7) and (8) are erected at predetermined intervals in the running water direction at the center of the water channel width direction at the upstream side water channel bottom (2) of each partition wall (3). The pillar (7),
(8) is a tube made of stainless steel or the like and is considerably elevated. In addition, (9) is a column base plate.

(10) is an overflow type gate body suitable for fish run-up, and is formed in a hollow shape, and extends upward and upstream in the central portion of the gate body (10) in the waterway width direction. The floating float (11) is integrally connected (rigid),
The float (11) is a non-overflow part, and the columns (7) and (8) are provided corresponding to the guide columns (7) and (8).
Strut insertion cylinders (12) and (13) penetrating in a loose fitting manner are fixed in the vertical direction.

On the upper and lower surfaces of the float (11), guide rollers (14), (15), (16), and (17) are provided around the horizontal shaft around the pillar insertion tubes (12) and (13). Is rotatably attached to the guide roller (14)-
The float (11) is connected to each strut (7) through (17),
(8) is supported and guided vertically. Although the watertightness of the downstream side surface of the gate body (10), the upper end of the partition wall (3) on the upstream side, and the gate body (10) and the water channel side wall (1A) are not shown, they are generally adopted conventionally. It is done with a water stop plate and a watertight rubber.

The float (11) and the gate body (1
0) is the weight of the gate body (10) and the float (1)
Balanced by the buoyancy of the submerged part of 1), the part above the water surface of the float (11) is designed to be a drive float that exerts a driving force against the guide roller resistance and the watertight rubber resistance when the gate is raised. Fine adjustment of overflow water depth is performed by ballast.

According to the above embodiment, the gate body (10)
And the float (11) is kept in balance by its buoyancy and a certain overflow water depth is secured, it follows the fluctuation of the water level on the upstream side and moves up and down without power, and the overflow water depth is automatically kept constant. In addition, the float (11) is supported and guided by the guide columns (7) and (8) to prevent the runout and to perform a smooth lifting operation. Therefore, no power is needed and no water level detection and control means are required.

FIG. 4 shows an essential part of another embodiment of the present invention.
The difference from the above embodiment is that the bottom (2) of the fishway channel (1) has a stepped shape, and the height of each partition (3) from the upstream side bottom (2) is the same. is there. In this embodiment, the same effect as the above embodiment can be expected.

In the present invention, in addition to the above embodiment, the gate main body is arranged at the center in the waterway width direction, the floats are connected and integrated at both ends thereof, and the guide columns penetrating the float are erected on the waterway side wall side. be able to. In this case, the gate body may be plate-shaped. The present invention is not limited to the above-mentioned embodiment, and the design can be changed as appropriate.
Both ends of the gate main body can be supported and guided by the side wall of the water channel, and the guide columns can adopt prisms or shaped steel materials. Furthermore, in the above-mentioned embodiment, the gate main body located on both left and right sides of the center float is used. The height of the crown can be made different, and the overflow water depth can be made different on the left and right.

[0015]

As described above, according to the present invention, an overflow gate body suitable for fish run-up is provided upstream of a plurality of partition walls provided at arbitrary intervals in the water flow direction at the bottom of a water channel or the like. A fishway gate provided to be movable up and down, wherein a float is integrally connected to the gate main body, and the float or gate main body is movably supported vertically on a guide strut standing on the bottom of a waterway or the like. Since the main body is configured to automatically move up and down in response to fluctuations in water level, the structure is extremely simple and civil engineering work is simple. In addition to water level detection / control means, not only the hydraulic cylinder drive device and its power It is unnecessary, construction cost can be reduced significantly, installation location is not restricted, maintenance is easy, and it is ideal for locations where the side wall of the waterway cannot be cut out.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an essential part of the embodiment.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing the main parts of another embodiment of the present invention.

[Explanation of symbols]

 1 Fishway Waterway 2 Waterway Bottom 3 Bulkhead 7 Guide Strut 8 Guide Strut 11 Float 14-17 Guide Roller

Claims (2)

[Claims] 1. A fishway gate in which a overflow gate main body suitable for fish run-up is provided on the upstream side of a plurality of partition walls provided at arbitrary intervals in the water flow direction at the bottom of a waterway etc. A float is integrally connected to the gate body, and the float or the gate body is vertically movably supported by a guide strut standing on the bottom of a waterway or the like, and the float and the gate body follow the fluctuation of the water level. A fishway gate characterized by being automatically raised and lowered. 2. The two guide struts are provided upright in the upstream and downstream directions in the central part of the water channel, and vertically penetrate a non-overflow float provided in the center of the water channel width direction, and the floats are guided by guide rollers. The fishway gate according to claim 1, wherein the guide pillar is supported and guided.