JPS602270Y2 - 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 equipped with a lodging mechanism.

Recently, movable weirs made of flexible membranes have been used for irrigation purposes, etc., but these weirs are constructed by using a flexible membrane, such as a rubberized fabric envelope (bag-like body), at least on the riverbed to cross the river. Attach it in the direction,
A fluid such as air or water is sent into the interior of the envelope from an inlet and exhaust pipe that communicates with the bottom of the envelope to cause it to expand or discharge fluid from the interior of the envelope to cause it to contract and collapse (for example,
(See 〇-11702, Special Publication No. 44-2371).

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

In view of this point, the present invention is a model G in which the above-mentioned movable weir can be automatically lowered.

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

In Figure 1, which shows 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 river bed concrete 21 across the river, and the blower 19 is operated to blow air into the envelope 1 through the pipelines 8, 2 and the pipe 4 to inflate (erect) it.

After expansion, the valve 26 is closed and the operation of the blower 19 is stopped.

20 indicates an operation room. Conversely, envelope 1 contracts (lodges)
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 air supply pipeline 8 is led to a blow-off tank 10 and left open at the tip.

Water 11 is stored in the blow-off tank 10, and the distance from the tip of the pipe 9 to the water surface is made to correspond to the maximum allowable design pressure within the envelope.

By doing this, when a pressure higher than the design pressure is applied to the envelope due to the expansion of the envelope, air is released from the tip of the pipe 9, and an accident due to overpressure of the envelope is prevented.

In the above movable weir, 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 re-pipeline 18.

The height 29' of the inverted U-shaped pipe 17 is the automatic collapse water level 2 upstream.
It is equivalent to 9.

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 connected to a packet 14, for example, a stainless steel packet, through a flexible hose 15, and water flowing out from the pipe 17 enters the packet 14.

The packet 14 descends under the weight of this water.

For example, a stainless steel wire 13 is tied to this packet 14, and the lever 7 of the lever-set butterfly valve 45 is pulled through the pulley 12 to open the butterfly valve 45 of the compressed air circuit.

The compressed air circuit and butterfly valve are as follows.

That is, air compressor 46, compressed air tank 47
Compressed air is added to pipeline 48 and two pipelines 49,50 branching off from 48.

The tip of one pipeline 49 reaches the lower part of the cylinder of the complete cylinder butterfly valve 6, and normally keeps the valve in a closed state.

The tip of the other pipeline 50 is a butterfly valve 45
The pipeline 51 is connected to the upper part of the cylinder set butterfly valve 6, and as mentioned above, when the packet 14 pushes the butterfly valve 45 at the automatic collapse water level, compressed air flows and opens the valve 6. .

When the valve 6 is opened, the air in the envelope 1 is released into the atmosphere through the pipe 4, the pipeline 2, and the exhaust pipe 42, and the envelope 1 is completely deflated.

As shown in FIG. 2, the main body of the butterfly valve has a valve body 32 which can open and close the passage of the surrounding pipe by rotating a valve rod 31.

In FIG. 2, 33 is a main body, and 34 is a seat ring.

The lever 7 is attached to the tip of the valve rod 31 so as to rotate the valve body 32.

Further, 16 is a drain valve of the packet.

Furthermore, 27 is an air vent and overflow prevention valve which acts as an escape port for the air in the packet when the packet is filled with water, and also prevents water from overflowing when the packet is full.

FIG. 3 is an example of the present invention using the above-mentioned automatic lodging mechanism in the case of a water-inflatable type.

FIG. 3 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.

40 indicates a pump, by means of which water is pumped into pipeline 8'
, 2' and pipe 4' to send water to the envelope 1 and expand it (
(stand up).

Also, as a safety device, a bypass pipe 41 is provided in the drain pipe 42' across the valve 6 (without passing through the valve).
The height of this bypass pipe corresponds to the maximum allowable design pressure within the envelope, and when this pressure is exceeded, the water within the envelope is discharged from the drain pipe.

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 can automatically release water (water) and contract (lodge) the envelope automatically.

Furthermore, the present invention is particularly effective when the diameter of the exhaust (water) pipe is 150m++ or more, and when the opening/closing force of the valve provided on the exhaust (water) pipe is 150mm or more, it becomes large and it is easier to open and close with the force of compressed air. There are advantages such as:

[Brief explanation of drawings]

Figure 1 is a 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 3 is a FIG. 4 illustrates a front view of the movable weir made of a flexible membrane of the present invention for interstage use in the case of an inflatable type. 1... Cover, 2, 2'... Pipeline, 4, 4'
... Pipe, 6... Cylinder set butterfly valve, 7... Lever, 8.8', 9... Pipeline,
10...Blow-off tank, 11...Water, 12...
・Pulley, 13...Wire, 14...Packet, 15
...Flexible hose, 16...Drain valve, 1
7... Inverted U-shaped pipe, 18... Pipeline, 19
...Blower, 20...Control room, 21...River bed concrete, 26...Valve, 27...Air vent/overflow prevention valve, 28...Dresser coupling, 29...Automatic lodging Water level, 29'... Height of inverted U-shaped pipe 17, 30... Upstream water level detection port, 31.
... Valve rod, 32 ... Valve body, 33 ... Main body,
34... Seat ring, 38... Air vent pipe, 40...
...Pump, 41...Bypass pipe, 42...Exhaust pipe, 42'...Drain pipe, 45...Butterfly valve, 46...Air compressor, 47...Compressed air tank, 48, 49,50.51...Pipeline.

Claims (1)

[Scope of utility model registration request] Attaching the flexible membrane envelope in the direction across the river at least to the riverbed involves sending fluid as a pressure medium into the interior of the envelope to make it expand and stand up, and expel the fluid as a pressure medium from inside the envelope to cause it to contract and fall down. The diameter of the exhaust (water) pipe is 150 m.
For weirs with a water capacity of more than A means for opening at the collapse water level and discharging a fluid serving as a pressure medium inside the envelope is provided to cause the envelope to contract and collapse. The means to open the fluid pipe 0 valve automatically at the collapsed water level and release the fluid that is the pressure medium inside the envelope is to install an inverted U-shaped tube at the other end of the water level detection tube, and automatically adjust the height of this inverted U-shaped tube. The water flowing out of the inverted U-shaped pipe is placed at a level corresponding to the overflowing water level, and the water flowing out from the inverted U-shaped pipe at this automatic overturning water level is collected into a packet, which descends due to the weight of the water. A movable weir made of a flexible membrane, characterized in that a valve in a pipe leading to a pipe valve is opened, and compressed air is applied to a valve in a drainage pipe to open the valve.