JPS60203716A - Flexible film weir - Google Patents

Abstract

PURPOSE:To form V-notch in a predetermined place, by a method wherein a feed and exhaust pipe having feed and exhaust ports mutually separated is provided inside a part of the longitudinal direction of flexible film body and it is delayed to be fallen for the film body except a portion to be fallen at first. CONSTITUTION:A rubber weir 5 is fixed to a river-bed 1 and a slope 2 of a river bank, and is integrated with a set of rubber cylinders 8, 9 extending in the direction of the river width near a fixed base portion 7 on the inner wall of the rubber film 6 facing the upper stream side of the rubber weir 5. The outer ends of the cylinders 8, 9 are connected to the feed and exhaust pipes 4 for the faces of slope, and the closed inner ends are mutually separated with a distance (t) between them. The separated distance is arranged almost on the mid-point of the rubber weir. Thus, V-notch can be always formed in the predetermined place on the flexible film.

Description

[Detailed description of the invention] Ru.

The air flexible membrane weir (also known as the rubber weir), which is built across the river, is the first dam that can be raised and lowered by supplying and discharging air. The air 2nd flexible membrane weir is the water 2nd mouth” flexible T! 1. Unlike a membrane weir (one that drains water and then stands up), when it is toppled over, when it is filled with air, the membrane pupil forms a V-shape at one (or two) points in the width direction of the column. It deforms into a shape and begins to fall down (■ Nottsuchi phenomenon), where the flow concentrates at the sharp V-notsuna point (see Figure 1).

In the figure, 01 indicates the rubber weir and the V-shaped notch).

54, also, v7gga, zu7. , 1st place. □, it is uncertain because it changes depending on the shape of the river II+, the flow conditions, the construction method of the flexible membrane weir, etc., and if the flow concentrates near the slope, the levee will be damaged by scouring of the downstream river bed. There is a risk of causing destruction. Therefore, in order to prevent concentration of flow from occurring anywhere, it is necessary to provide a crushing bed for preventing scouring on the downstream side over the entire cutting width direction, which increases the construction cost.

The present invention was developed against this technical background, and its purpose is to provide a flexible membrane weir in which the V-notch always remains in place.

The structure of the present invention is such that in a flexible @weir that rises and falls by supplying and discharging air, a means is provided for substantially delaying the fall of other parts compared to one part in the longitudinal direction. This place has a unique character.

In this way, the flexible membrane weir of the present invention is provided with a means for substantially delaying the lodging of other parts of the weir compared to one longitudinal part of the weir. Lodging occurs first, and that part becomes V-shaped. Therefore, at the construction stage of the flexible membrane weir, the location where Vnotuna occurs is determined, and a protection bed is installed corresponding to that location to protect the river bed 7 from the concentration of the flow rate.
If possible, construction costs can be reduced. In addition, by creating a V-notch 2 at a position far from the river bank, it is possible to protect the embankment q from concentration of flow.

Embodiment 7 of the present invention will be described below with reference to FIGS. 2 to 8.

Figure 2 shows a longitudinal cross-sectional view of a rubber weir 5 installed across a river, seen from the downstream side. There is. On the inner wall of the rubber membrane 6 facing the upstream side of the rubber ring 5, a pair of rubber cylinders 8.9 extending in the column width direction are provided at a position close to the fixed base 7.
are joined together. The outer ends of the cylinders 8 and 9 are hermetically fixed to the slopes and communicate with the exhaust pipe 4, and the closed inner ends of the cylinders 8 and 9 are spaced apart from each other by a distance t. This separated portion A is located approximately at the center in the column width direction. The rubber weir body and the cylinder 8.9 are independently supplied and exhausted through the respective supply and exhaust pipes 3.4.

In addition, when the rubber weir body is in an upright state, its internal pressure and the internal pressure of the cylinder oil, 9, are approximately unequal.
The tension acting on the rubber membrane is almost zero.

(For the above, refer to Figures 2 to 4. However, Figure 3 is a partially cutaway perspective view of the rubber ring 5, and Figure 4 is a partial cutaway perspective view of the rubber ring 5.
-IV line sectional view).

In order to collapse the rubber weir 5 of the above structure, first exhaust air 7 of the rubber weir body through the supply and exhaust pipes 3-vi. During the evacuation process, a normal rubber ring 50 will collapse in the shape shown in FIG. In the rubber ring 5, as shown in FIG. 5, the cylinder 8.9 is connected to the rubber membrane 6A facing downstream.
After contact, the rubber membrane 6 at the location where the cylinder 8.97a1' is provided is removed.
The rubber membrane 6 is not able to fall down any further, and the rubber membrane 6 in the areas where the two cylinders 8.9 are not present sinks in a V-shape as shown in FIG.

1+J, in the part where the cylinder 8.9 exists, the rubber membrane 6 is supported by the cylinder 8.9 and is stiffened, whereas the cylinder 8,9
In the part (g[I: partition A) where no
j The rigidity of the resisting rubber film 6 (apparently the upper rigidity) decreases,
It will sink in a V-shape.

After the exhaust of the rubber weir body is completed (see Figure 7) (or from the middle of exhausting the rubber weir body), the cylinders 8 and 9 are exhausted through the supply and exhaust pipes 4 and 5 of the rubber weir. Fully lie down (see Figure 8).

In the actual test, the weir height (H = 1
A rubber weir of 0cIn) was installed, and the outer diameter of the cylinder was 8.9cm.
cm, interval t of W interval part A of 'm1ii 8.9
Although the Y was set at 30 cm, a V notch always occurred in the spaced part A during lodging.

Next, the characteristic points of this implementation φ1 will be listed.

■■By setting the separated part A'Y where the knot occurs at a desired position when constructing the rubber ring 5, it is sufficient to provide a guard bed corresponding to f6, and a cost reduction can be achieved.

■A separate part A2 is defined at the slope side part 1 and the embankment is protected.

■Since V-notches always occur only in isolated parts, it is possible to predict changes in the flow rate of the rubber weir 5 or 5, making it easy to adjust the water level.

Incidentally, in the above-mentioned embodiment, the tube 8.9 is attached to the rubber membrane 6, but it may be attached to the rubber membrane 6A facing the downstream side.

Next, the rubber ring 10 shown in FIGS. 9 to 13 will be explained.

In the rubber ring 10, the rubber membrane main body is formed of an outer membrane 11 and a diaphragm 12, and the first chamber, 13,
A first I room 14 is defined. The diaphragm 12 has an eleventh chamber 14
is attached along the outer membrane 11 facing the upstream side, and the second chamber 14 is minimal at the cutting width center position B and gradually becomes larger toward the width 2 of both river banks. Cross-sectional shape 7 of the rubber ring 10 that changes in the row width direction Figures 10 to 12
(However, FIGS. 10 to 12 show the X-X line, XI-XI line, and Xll-X line in FIG. 9, respectively.
It is a ll line sectional view. Broken line 15&' in the figure: J reinforced canvas 7).

FIG. 13 shows the supply of air to the rubber ring 10, and air is supplied to the chamber I3 and the chamber II 14 by the blower 15 following each piping 7. By providing 16 stop valves and 17 orifices, No.
The internal pressure 7 of the chamber 14 can be maintained high.

However, in order to collapse the rubber weir 10, first open the exhaust valve 19 to exhaust the air from the chamber 13. Start. In the darkness, since the exhaust of the 1st I and 14 is not performed, it works in the same way as the previous cylinder 8.9, and a V note is generated at the center position B. Then, after the exhaust force of the first chamber 13 is completed (or during the exhaust of the first chamber 13), the valve 18 is opened to perform υl''M, Y of the second chamber 14.

In this series, the outer coating 1 and the diaphragm 12 are integrally vulcanized and molded using a 7M filter, so manufacturing is simple.

Next, the embodiment shown in FIGS. 14 to 16 will be described.

The rubber weir 20c, its main body rubber membrane 21, the left side disposed inside it, a pouch body 22 of a pair of stones, and seven other main parts.

The main rubber membrane 21 is laid by folding a long rubber band into two and fixing it to the riverbed 1 and the river bank 2 with anchor bolts 24 on the open end side. B is also a bifold band similar to the main body, and is fixed integrally with the main body rubber membrane 21 with anchor bolts 24. The pouch body 22, η has a main rubber membrane 21 at one end thereof.
The other end of each closed end is spaced apart from each other (separated part C). Figures 15 and 16
The diagram shows lines xv-xv in Fig. 14, XVI-XVI
It is a line cross-sectional view, and clearly shows the relationship between the main rubber membrane 21, the pouch body 22, and the pond.

When the rubber weir 20 having such a structure is laid down, the inside of the main rubber membrane 21 is first evacuated. During the collapse process, a V-notch is generated at the detached portion C due to the action of the pouch body 22. Then, after the evacuation of the inside of the main rubber membrane 21 is completed (or after the evacuation of the inside of the main rubber membrane 21 is completed, the pouch body 22 and the passageway are evacuated 7).

In the rubber ring 30 shown in FIGS. 17 and 18, the inner chamber of the main body comb membrane 31 is divided into three by -%I diaphragms 32 and 33, and the male I chamber 34 located in the center is divided into three parts. left,
It is smaller than the stone chambers U and IIJ, 35.36, and is supplied independently from chambers 34 and 35.36,
Be exhausted. For the lodging, the first chamber 34 is evacuated 7 times, and then the 11th chambers 35 and 36 are evacuated 7 times.

Therefore, it is clear that a V-notch occurs in the first chamber 34.

In the rubber ring 40 shown in FIG.
The membrane wall 42 facing the upstream side is made thick except for the central part 43, and the rigidity of the membrane wall 42 is greater than that of the central part 43, so that the V-notch is prevented when it is collapsed. always occurs in the central part 13.

As is clear from the above explanation, in the separable membrane weir of the present invention, the notch generation position can be set at a desired position in the cutting width direction, so there is no need to provide a guard bed 7 over the entire cutting width, and the flow rate is Adjustment also becomes easier.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing a collapsed shape 7 of a known rubber ring, FIG. 2 is a longitudinal sectional front view of a rubber ring according to an embodiment of the present invention, FIG. 3 is a cutaway perspective view of the main part thereof, and FIG. The figure is a sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a longitudinal sectional side view showing the shape 7 of the rubber ring in the middle of collapse, and FIG. 6 is a longitudinal sectional front view thereof.
FIGS. 7 and 8 show the shape of the rubber ring during the initial collapse and after the collapse is completed, respectively, and FIG. 9 is a front view of the rubber ring according to another embodiment. Figures 10 to 12 show husband t.
'The x-X line in Fig. 1, XI -X, 1 line, XI! -Xll line sectional view, FIG. 13 is a diagram showing the supply and exhaust threads of the rubber ring, FIG. 14 is a front view of a rubber ring according to another embodiment, and FIGS. 15 and 16 are each That xv
17, 18, and 19 are explanatory diagrams of rubber rings according to other embodiments, and FIG. 20 is a cross-sectional view of a known rubber ring. It is a vertical cross-sectional side view of the shape of the reservoir in the middle of lodging. ■... River bed, 2... River bank method, 3.4... Supply, exhaust pipe, 5... Rubber ring, 6... Rubber membrane, 7... Fixed base, 8-9... ...Cylinder, 10...Rubber ring-11...
・Outer membrane, 12... diaphragm, 13... first chamber, 14.
... Chamber H, I5... Blower, 16... Check valve,
17... Orifu dog 20... Rubber ring, 2 [... Main body rubber membrane, 22-. 2
．． 3... Small bag body, separate... Anchor bolt. 30...Rubber ring, 31...Body rubber membrane, 32.33
...Partition wall, 34...First chamber, 35...First mouth chamber, 36
...No. 111 ¥-40...Rubber ring, 41...Rubber@-42...Membrane wall, 43...Central part, 50...Rubber ring, 51...Mystic law. Agent/patent attorney Nozomi Ehara, 2 people

Claims (1)

[Claims] Sky 7. In a flexible membrane weir that rises and collapses due to the supply and discharge of water, a means is provided for substantially delaying the collapse of other parts of the weir compared to one part in the longitudinal direction,
The one-mouth flexible membrane weir is characterized in that it deforms into a V-shape and collapses from one location in the longitudinal direction.