JPS604325B2 - Flexible membrane movable weir - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a movable weir made of a flexible membrane (air or water expansion type), and more particularly to a movable weir made of a flexible membrane provided with a lodging mechanism.

In recent years, movable weirs made of flexible membranes have been used for irrigation, etc., but these weirs are designed to cross the river at least on the river bed with a covering (bag-like body) made of flexible membranes, such as rubberized cloth. It is installed in the direction of the casing, and air or water is sent into the casing from an inlet/outlet water pipe located at the bottom of the casing to cause expansion (see, for example, Japanese Patent Publication No. 40-11702 and Japanese Patent Publication No. 44-2371).

With this type of movable weir, for example, when a river floods, it is necessary to collapse the movable weir to allow water to flow downstream.

In view of this, the movable weir mentioned above should be automatically lowered and vented (
The present invention allows this to be carried out even when the diameter of the water pipe is large. The present invention will be explained in detail below with reference to the illustrative drawings.

In FIG. 1 showing an air-inflatable movable weir, 1 is an envelope (bag-like body) made of a flexible material such as rubberized cloth, which is attached to the riverbed concrete 21 across the river.
Blower 19 is operated to connect pipelines 8, 2 and pipe 3.
, 4, 5, (3, 5 may not be provided) so that air can be blown into the envelope 1 to inflate (erect) it. After expansion, close the valve 26 and blower 19
stop driving. Note that 22 and 23 are river law sections, and 24 and 2
5 indicates the river bank, and 20 indicates the control room. On the contrary, envelope 1
When contracting (lodging down) the envelope 1, this can be done by opening the valve 6 and releasing the air inside the envelope 1 into the atmosphere.

As a safety device, a pipeline 9 branched from the crazy pipeline 8 is led to a blow-off tank 10 with its tip open. The flow-off tank 10' stores water 11, and the distance from the tip of the pipeline 9 to the water surface is made to correspond to the design pressure of the upstream water level. By doing this, if a pressure higher than the design pressure is applied to the envelope during the expansion of the envelope, air will escape from the tip of the pipeline 9, thereby preventing accidents due to overpressure of the envelope.

In the movable weir as described above, the present invention is particularly designed as follows.

When the upstream water level reaches the automatic collapse water level 29, the upstream water level is transmitted from the upstream water level detection port 30 to the inverted U-shaped pipe 17 through the pipeline 18. The height 29' of the inverted U-shaped pipe 17 is made to correspond to the automatic collapse water level 29 upstream. That is, the inner bottom surface of the highest part of the pipe 17 is made equal to the automatic collapse water level. Therefore, when the water rises upstream and exceeds the automatic collapse water level, water flows out from the inverted U-shaped pipe.

The inverted U-shaped pipe 17 is passed through a bucket 14, for example, a stainless steel bucket, through a flexible hose 15, and water flowing out from the pipe 17 enters the bucket 14. The bucket 14 descends under the weight of this water.

This bucket 14 has a wire, for example, a stainless steel wire 1.
3 is tied together, and the lever 7 of the lever-type butterfly valve 6 is pulled through the pulley 12 to open the valve 6. Due to the weight of the water in the bucket, the valve can be opened even if the exhaust pipe has a large diameter. When the valve 6 is opened, the air in the envelope 1 is released into the atmosphere through the pipes 3, 4, 5, the pipeline 2, and the exhaust pipe 42, and the envelope 1 is completely deflated.

In the above, the bucket 14 is of a closed type, as shown in the drawing, and is equipped with an air vent and overflow prevention valve 27, and as shown in FIG. This also prevents water from overflowing when the bucket is full. 16 is a drain valve for the bucket.

As shown in FIG. 2, the butterfly valve 6 has a main body which is configured so that a valve body 32 can open and close the passage of the rotating pipe by rotating a valve shank 31 as shown in FIG.

In Figure 2, 33 is the main body, 34 is the seat ring, 35, 36
, 37 is a circle. The lever part is as shown in the diagram. Furthermore, 28 is a dresser coupling, as shown in Figure 3, which has a diameter of 4mm inserted into a large diameter pipe.
A pipe is inserted so that the two can be installed airtight, and the automatic collapse water level of the inverted U-shaped pipe can be adjusted.

38 is an air vent pipe, and 39 is an upstream water level detector, such as a transparent vinyl chloride pipe.

FIG. 5 is an example of the present invention using the above-mentioned automatic lodging mechanism in the case of a water-inflatable type.

FIG. 5 is the same as the air expansion type shown in FIG. 1 except for the following points. Note that the same symbols as in FIG. 1 indicate the same parts. Reference numeral 40 denotes a pump, which allows water to be sent to the envelope 1 through the pipelines 8, 2 and the pipe 4 to cause it to expand (erect).

Also, as a stabilizing device, the bypass pipe 41 is connected to the valve 6 in an inverted U shape.
(without passing through a valve) in the drain pipe 42', and the height of this inverted Uga corresponds to the design pressure of the upstream water level, and if this pressure is exceeded, the drain pipe It is designed to be discharged from In the present invention as described above, when the upstream water level exceeds the automatic collapse water level, it is detected via the water level detection tube, and in conjunction with this detection, the fluid (air or It has the advantage that it releases water (water) and deflates (lodges) the capsule automatically.

This can be done even when the diameter of the exhaust (water) pipe is large. Furthermore, in the present invention, since the bucket is equipped with an overflow prevention valve that also serves as an air vent, it is possible to prevent the upstream water from flowing into the bucket without limit and overflowing to cause flooding.

[Brief explanation of the drawing]

Figure 1 is an explanatory front view of the flexible membrane movable weir of the present invention in the case of an air expansion type, Figure 2 is a perspective view of the butterfly valve used in Figure 1, and Figure A is the main part. , Figure 3 is an enlarged view of the vicinity of the dresser coupling part in Figure 1, and Figure 4 is an enlarged view of the vicinity of the air vent and overflow prevention valve part in Figure 1. are doing. FIG. 5 illustrates an explanatory front view of a flexible membrane movable weir of the present invention using the same automatic lodging mechanism as in FIG. 1 in the case of a water-expandable type. 1... Encapsulation, 2... Pipeline, 3, 4, 5... Pipe, 6... Butterfly valve, 7
...Lever, 8, 9...Pipeline, 10...Flow off tank, 11...Water, 12...Pulley, 13...Wire, 14...Bucket, 15...Flexible hose, 16...・Drain valve, 17...Inverted U-shaped pipe, 18
...Pipeline, 19...Blower, 20...Operation room, 21...River bed concrete, 26...Valve,
27... Air venting and overflow prevention valve, 2
8...Dresser coupling, 29...Automatic collapse water level, 29'...Height of inverted U-shaped pipe 17, 30...
・Upstream water level detection port, 38...Air vent pipe, 39...
Upstream water level detector, 40...pump, 41...bypass pipe, 42...exhaust pipe, 42'...drain pipe. Car figure 2 figure soup 3 figure soup 4 figure spear 5 figure

Claims (1)

[Scope of Claims] 1. A movable weir in which a flexible membrane envelope is attached to at least a river bed in a direction across the river, and the envelope can be expanded and erected by supplying fluid to the weir. An inverted U is attached to the other end of the water level detection tube that opens upstream of the weir below the automatic lodging water level.
An inverted U-shaped tube is installed, and the height of the top of this inverted U-shaped tube corresponds to the automatic collapse water level of the weir, and this inverted U-shaped tube and a closed bucket with an air vent and overflow valve are installed at a lower height. A movable weir made of a flexible membrane, characterized in that the string-like body connected to the bucket is connected by an expandable tube, and the other end of the string-like body tied to the bucket is connected to a valve provided in a drainage pipe connected to the inside of the envelope. 2. The inverted U-shaped tube provided at the other end of the water level detection tube has a different diameter than the water level detection tube and has a height adjustment means that allows one to be inserted inside the other and airtightly joined. Movable weir made of flexible membrane. 3. The flexible membrane movable weir according to claim 1, wherein the valve provided in the drainage pipe connected to the interior of the envelope is a lever-type butterfly valve.