JP4823997B2 - Silencer for overflow dam - Google Patents

Description

  The present invention relates to a silencer for an overflow weir.

2. Description of the Related Art Conventionally, there is one in which the upper portion of the downstream side of the overflow weir is covered with a flexible sheet in order to mute the sound of overflow water from the overflow weir installed in the water channel (see Patent Document 1).
Japanese Utility Model Publication No.59-10331

  However, since the background technology only covers the downstream side of the overflow weir with a flexible sheet (noise prevention cover), there is a possibility that the water flow may be hindered during a flood, and the downstream end of the flexible sheet There is a problem that maintenance such as removal of floating substances accumulated on the side is troublesome.

  In addition, when the waterway is close to a private house, there is a problem that the scenery is very bad.

  The present invention has been made to solve the above problems, and provides a silencer for an overflow dam that does not obstruct the water flow in the event of a flood, can easily perform maintenance such as removal of suspended solids, and improves the landscape. It is for the purpose.

  In order to solve the above-mentioned problems, the present invention provides a silencer for silencing the overflow water of overflow water from an overflow weir installed in a water channel, which is fixed to the upper end of the water channel and overflows the weir An upper soundproofing plate that covers the upper side of the overflow weir and an upstream soundproofing device that is hinged to the upper soundproofing plate upstream of the overflow weir so that it can swing in the downstream direction and the float at the lower end can float to the upstream water surface And a downstream soundproofing plate that is hinged to the upper soundproofing plate downstream of the overflow weir so as to be swingable in the downstream direction, and whose lower end can sink under the downstream water surface. A characteristic silencer for an overflow dam is provided.

  According to a second aspect of the present invention, it is preferable that the overflow weir is a undulation gate, and an interlocking mechanism that swings the downstream side soundproof plate in the downstream direction in conjunction with the collapse of the undulation gate is provided.

  It is preferable that an operating mechanism capable of swinging the downstream side soundproof plate in the downstream direction is provided.

  According to the present invention, the upper sound insulation board, the upstream sound insulation board, and the downstream sound insulation board cover the entire overflow weir installed in the water channel, so that the overflow sound of the overflow water from the overflow weir is outside. Since it does not leak, the sound can be effectively silenced. In addition, since the float of the upstream soundproof plate floats on the upstream water surface, there is no leakage of overflow water from the overflowing water from the gap between the lower end of the upstream soundproof plate and the water surface. Since the lower end portion of the soundproof plate sinks under the water surface on the downstream side, the water noise of the overflowing water does not leak out from the gap between the lower end portion of the downstream soundproof plate and the water surface.

  Further, since the float of the upstream soundproof plate floats on the upstream water surface, the upstream soundproof plate automatically swings according to the upstream water level, so there is no possibility of disturbing the water flow.

  Furthermore, if the downstream soundproof plate is swung in the downstream direction during a flood, there is no risk of disturbing the water flow during the flood, and if the downstream soundproof plate is swung in the downstream direction during normal times, Maintenance such as removal can be easily performed.

  Furthermore, since the overflow weir is covered with the upper soundproof plate, the upstream soundproof plate, and the downstream soundproof plate, the scenery is improved as compared with the cover of the flexible sheet.

  According to the second aspect, when the downstream side soundproof plate is swung in the downstream direction in conjunction with the overturning of the undulation gate by the interlocking mechanism at the time of flooding, there is no possibility of disturbing the water flow at the time of flooding.

  According to the third aspect, when the downstream side soundproof plate is swung in the downstream direction by the operation mechanism, maintenance such as removal of accumulated suspended matter can be performed more easily.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view of a silencer installed in a undulation gate (overflow weir) 3 in a water channel 1 (the left half of the upper soundproof plate 6 is not shown toward the downstream), and FIG. FIG. 3 is a side sectional view, and FIG. 3 is a front view of FIG. 1 (the illustration of the left half of the upstream soundproof plate 10 and the undulating gate 3 is omitted toward the downstream), and FIG. It is a disassembled perspective view of 10 and the downstream soundproof board 14. FIG.

  A concrete water channel 1 near a private house is composed of a bottom 1a and both side walls 1b, 1b, and safety fences 2 are erected on the upper surfaces of both side walls 1b, 1b.

  In the water channel 1, an undulating gate 3 is installed. The hoisting gate 3 is swingably supported by a hinge shaft 4 so as to be swung between a standing position U shown by a solid line in FIG. 2 and a tilting position D shown by a two-dot chain line. As shown, the swinging control is performed between the standing position U and the lying position D. A spoiler 5 is attached to the top of the undulating gate 3.

  The undulation gate 3 is always held at the standing position U shown in the figure, and when it is detected by a float (water level meter) or the like that the upstream side has reached a predetermined water level during a flood or the like, the swaying position D is automatically set. It is controlled to swing.

  A rectangular upper soundproof plate 6 is provided directly above the undulating gate 3, and the upper soundproof plate 6 is fixed to a fixture 7 fixed to the upper ends of both side walls 1 b and 1 b of the water channel 1. . An upper soundproof rubber 8 is attached to the left and right ends of the upper soundproof plate 6 so as to close the gap between the side walls 1b and 1b, and a soundproof rubber sheet (not shown) is attached to the inner surface of the upper soundproof plate 6. ) Is pasted.

  An upstream sound insulation plate 10 is hinged to the upstream end portion of the upper sound insulation plate 6 on the upstream side of the undulation gate 3 so as to be swingable in the downstream direction by a hinge shaft 11 (see a two-dot chain line a in FIG. 2). Yes. A float 12 that can float on the upstream water surfaces L1 and L2 is attached to the lower end of the upstream soundproof plate 10. Side soundproof rubbers 13 that close the gaps between the side walls 1b and 1b are attached to the left and right ends of the upstream soundproof plate 10, and a soundproof rubber sheet is attached to the inner surface of the upstream soundproof plate 10. (Not shown) is pasted. The water surface L1 is a normal water level, and the water surface L2 is a limit water level for overflow.

  A downstream side soundproof plate 14 is hinged to a downstream end of the upper soundproof plate 6 on the downstream side of the undulating gate 3 so as to be swingable in the downstream direction by a hinge shaft 15 (see the two-dot chain line b in FIG. 2). Yes. The lower end portion of the downstream soundproof plate 14 is set so as to sink under the downstream water surface L3. Side soundproof rubber 16 that closes the gap between both side walls 1b, 1b is attached to the left and right ends of the downstream soundproof plate 14, and the soundproof rubber sheet is attached to the inner surface of the downstream soundproof plate 14. (Not shown) is pasted.

  The upper position c of the undulation gate 3 and the lower position d of the downstream soundproof board 14 are connected by a wire rope 21 guided by a plurality of guide pulleys 20 installed on the side wall 1b side (lower side in FIG. 1). When the undulating gate 3 is in the upright position U indicated by the solid line, the downstream soundproof plate 14 is swung in the upstream direction indicated by the solid line to close the downstream side of the upper soundproof plate 6 and the undulating gate. When 3 is a lying position D indicated by a two-dot chain line, the downstream soundproof plate 14 is swung in the downstream direction indicated by the two-dot chain line b to open the downstream side of the upper soundproof plate 6. . The guide pulley 20 and the wire rope 21 constitute an interlocking mechanism 22.

  A manual operation mechanism (winch) 24 is installed on the upper surface of the other side wall 1b (upper side in FIG. 1).

  The operation mechanism 24 is provided with a detachable operation handle 24a. By manually rotating the handle 24a (see the two-dot chain line e), the downstream side soundproof plate 14 is connected to two points via the wire rope 25. It swings in the downstream direction indicated by the chain line b so as to open the downstream side of the upper soundproof plate 6. In this case, the wire rope 21 interlocked with the undulation gate 3 becomes loose.

  In the silencer for the undulating gate 3 as described above, the undulating gate 3 covers the entire undulating gate 3 installed in the water channel 1 with the upper soundproofing plate 6, the upstream side soundproofing plate 10, and the downstream side soundproofing plate 14. Since the sound of the overflow water from 3 does not leak to the outside, the sound can be effectively silenced.

  Moreover, since the float 12 of the upstream soundproof plate 10 floats on the upstream water surfaces L1 and L2, the water noise of the overflowing water falls outside from the gap between the lower end of the upstream soundproof plate 10 and the water surfaces L1 and L2. Since there is no leakage at all, and the lower end of the downstream soundproof plate 14 sinks under the downstream water surface L3, the water noise of the overflowing water falls to the outside also from the gap between the lower end of the downstream soundproof plate 14 and the water surface. There is no leakage.

  Further, since the float of the upstream soundproof plate 10 floats on the upstream water surfaces L1 and L2, the upstream soundproof plate 10 automatically swings according to the upstream water level, so there is no possibility of disturbing the water flow. .

  Further, during the flood, the interlocking mechanism 22 causes the downstream soundproof plate 14 to swing in the downstream direction in conjunction with the overturning of the undulation gate 3, so there is no possibility of disturbing the water flow during the flood.

  Further, in normal times, if the downstream soundproof plate 14 is swung in the downstream direction by the operation mechanism 24, maintenance such as removal of accumulated suspended matter can be performed more easily.

  Furthermore, since the undulating gate 3 is covered with the upper soundproof plate 6, the upstream soundproof plate 10, and the downstream soundproof plate 14, the scenery is improved as compared with the cover of the flexible sheet.

  In the above embodiment, the undulation gate 3 is taken as an example of the overflow weir, but it goes without saying that the present invention can also be applied to a fixed overflow dam that does not undulate.

It is a principal part fracture top view of the silencer concerning an embodiment of the present invention. It is side surface sectional drawing of FIG. It is a principal part fracture | rupture front view of FIG. It is a disassembled perspective view of an upper soundproof board, an upstream soundproof board, and a downstream soundproof board.

Explanation of symbols

1 Waterway 3 Relief gate (overflow weir)
6 Upper soundproof plate 10 Upstream soundproof plate 12 Float 14 Downstream soundproof plate 22 Interlocking mechanism 24 Operating mechanism

Claims (3)

A silencer for silencing the overflow water of overflow water from an overflow weir installed in a waterway,
An upper soundproofing plate fixed to the upper end of the water channel and directly covering the overflow weir is hinged to the upper soundproofing plate on the upstream side of the overflow weir so that it can swing in the downstream direction. An upstream soundproof plate that can float on the upstream water surface, and a hinged joint that is swingable in the downstream direction to the upper soundproof plate on the downstream side of the overflow weir, so that the lower end can sink under the downstream water surface A silencer for an overflow weir comprising a downstream soundproof board.   The overtop weir is a undulation gate, and is provided with an interlocking mechanism that swings the downstream soundproof plate in the downstream direction in conjunction with the overturning of the undulation gate. Silencer for flow weir.   The silencer for an overflow weir according to claim 1 or 2, further comprising an operation mechanism capable of swinging the downstream soundproof plate in the downstream direction.

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