JPS5851225Y2 - Flexible membrane undulating weir - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an undulating weir made of a flexible membrane, and more particularly to an undulating weir made of a flexible membrane provided with a drain pad.

A flexible membrane undulating weir has a flexible membrane envelope (bag-like body) made of rubberized cloth, for example, which forms the weir body, attached to at least the river bed in a direction transverse to the river flow, and connected to the inside of the envelope. Leading injection and exhaust (
Water) A fluid, such as air or water, or both, is sent from a pipe to expand and erect it, or to discharge fluid from the inside of the envelope to cause it to contract and collapse (for example, Japanese Patent Publication No. 40-11702, Japanese Patent Publication No. 44-2371). (see issue).

In this type of undulating weir, as shown in Fig. 1, when the pressure of the fluid 12, which is an expansion medium such as air or water, in the envelope 3 becomes lower than the external pressure due to river water during the weir's lodging and contraction process, as shown in FIG. The upstream portion 13 of the envelope gradually comes into close contact with the riverbed surface 14 from the upstream fixed end 15 toward the downstream side, and finally the fluid injection and drainage port, that is, the water injection and exhaust (water) port 5 is placed relative to this port. A situation arises in which the portion 7 of the envelope that is in contact with each other causes the lodging contraction to stop.

In order to prevent this and enable complete contraction, it is known that a drain pad with grooves that are substantially continuous in the flow direction of the river is provided on the inner surface of the envelope on the side facing the inlet and outlet (water) port. It is being

FIG. 2 is an example of a conventional undulating weir made of a flexible membrane provided with a drain pad (see, for example, Japanese Patent Laid-Open No. 5447338).

Figure 2 (a) is a view of the weir taken along the flow direction of the river, Figure (Figure 2) is a plan view of the weir, Figure (C) is the A-A cross section of Figure 2, and Figure (d) is a, l).
, c shows a perspective view of the drain pad of FIG. ,
Arrow F indicates the final exhaust (water) path of the expansion medium.

In the above case, when the envelope is contracted when the downstream water level is high, the downstream fixed end 16 of the envelope is bent upstream as shown in FIG. Due to the rigidity of the drain pad 9, this portion bulges and acts as a resistance to the flow, causing the envelope to sway and come into contact with the foundation 1 surface, causing wear and tear on the envelope.

Reference numeral 17 indicates this wear-damaged portion. The present invention has been devised to solve the above problems.

The present invention will be explained below with reference to the illustrative drawings.

In Figure 4 showing the flexible membrane undulating weir of the present invention, Figure a
is a cross-sectional view of the weir taken along the flow direction of the river, Figure C is a plan view of the weir, Figure C is a cross-sectional view taken along line A-A in Figure d, Figure d is Figures a, l), and c.
FIG. 3 is a perspective view of the drain pad of FIG.

In FIG. 4, the same reference numerals as in FIG. 3 indicate the same parts.

In the present invention, there is a gap 19 between the drain pads 9 in the direction across the river flow, and the drain pads 9 are attached to the inside of the envelope 3 on the side facing the inlet/exhaust (water) port (see Figures a and b). ).

Said drain pad has a substantially streamwise groove 10.
(see Figure d), and if possible, it is better to have grooves 10 in the direction of the river flow and grooves 18 in the direction transverse to the river flow (the grooves 18 also reduce rigidity) (Figure 5). reference).

According to the present invention as described above, a drain pad having grooves substantially in the flow direction of the river is provided on the side opposite to the inlet and outlet (water) inside the envelope, so that when the weir collapses, the expanding medium can be exhausted ( Securing the water route is the same as before.

Moreover, in the present invention, since the drain pads are provided with a gap in the direction across the river flow between the drain pads, this gap becomes a free bending part when the envelope is folded, and the drain pad Reduces the inconvenience of bending due to the rigidity of

Therefore, it is possible to prevent the two-folded portion of the envelope from protruding due to the rigidity of the drain pad as described at the beginning, and to prevent wear and tear caused by oscillating contact with the base surface of the envelope.

[Brief explanation of drawings]

Figure 1 is a diagram illustrating the necessity of providing a drain pad in a undulating weir made of flexible membrane, and is a diagram cut through the weir in the direction of river flow. These are diagrams of a flexible membrane undulating weir equipped with a pad, in which Figure A is a cross-sectional view of the weir taken along the flow direction of the river, Figure C is a plan view of the weir, and Figure C
Figure 3 is a cross-sectional view taken along the line A-A in Figure 3, Figure d is a perspective view of the drain pads in Figures a, l), and c, and Figure 3 explains the problem when providing the drain pad in Figure 2. The figures each illustrate perspective views of other examples of drain pads used in the present invention. 1...River bed, 3...Envelope, 4...Pipe, 5...Injection/drainage port, 6...Upstream water,
7... Part of the envelope facing the injection and drainage fluid port, 8.
...Two-fold part of the cover, 9...Drain pad, 10...Groove continuous in the direction of river flow, 11...2 of the cover Gap near the folded part, 1
2...Fluid as a pressure medium, 13...Upstream part of the envelope, 14...River bed surface, 15...
... Upstream fixed end of the covering, 16... Downstream fixed end of the covering, 17... Worn or damaged part of the covering,
18...Groove in the direction of crossing the river flow, 19.
·····gap.

Claims (2)

[Scope of utility model registration request] (1) A flexible membrane envelope that forms a weir is attached to at least the river bed in a direction across the river flow, and fluid is sent inside the envelope to expand and erect it, and the fluid is discharged from the interior of the envelope to cause it to contract. In a weir that can be collapsed, a drain pad with a groove that is substantially continuous in the direction of the river flow is provided with a gap in the direction transverse to the flow of the river, and the inner surface of the weir is injected and drained. An undulating weir made of flexible membrane installed on the side facing the fluid port. (2) The flexible membrane undulating weir according to claim 1, wherein the drain pad is provided with a groove that is substantially continuous in a direction transverse to the river flow.