JPS6227202B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flexible membrane undulating weir and, more particularly, to an air-inflatable flexible membrane undulating weir with an improved drain discharge device.

(Prior art and its problems) An undulating weir made of a flexible membrane has a covering (bag-like body) made of a flexible membrane (for example, rubber-coated cloth) that forms the weir body at least in the river bed in the direction across the river. After installation, a fluid as an expansion medium such as air or water is sent from an inlet/exhaust (water) pipe that communicates with the inside of the envelope to cause the product to expand and stand up, and the fluid is discharged from the inside of the envelope to cause the product to contract and collapse (e.g. (Refer to Special Publication No. 11702/1970 and Publication No. 2371/1971).

In a flexible membrane undulating weir, if drain accumulates inside the weir and fills the supply and exhaust pipes, the air inside the weir cannot be discharged unless this drain is removed, which impedes the flow of flood water. For this reason, conventional devices also have drain removal devices, and these can be roughly divided into the following two types.

A Under-riverbed horizontal piping method In method A, as shown in Figure 1, the supply and exhaust pipe 10 is connected to the weir body 1 under the riverbed, and the pipe crosses the embankment horizontally and comes out at the bottom of the control room 17. It is.
The operation is such that when the valve 18 in the operation chamber is opened, the air inside the weir and the drain inside the weir can be discharged at the same time.

In method A, the drain can be discharged by operating inside the operation room, so the drain inside the weir can be arbitrarily removed. Furthermore, if the valve 18 is linked to a lodging device such as the bucket mechanism 19, the drain inside the weir can be removed at the same time as the weir body is collapsed, and the drain does not interfere with the lodging of the weir body 1.

Although this method has functional advantages as described above, it requires the pipes to pass under the embankment and the control room must be made deep, which is disadvantageous in terms of the strength and protection of the embankment 20 and the economical efficiency of construction. It was hot.

In FIG. 1, 21 is an upstream water level detection tube, 22 is an overpressure prevention tube, and 23 is a water seal tube.

B. Drain removal method in a river channel As shown in FIG. 2, the B method has a drain removal pipe 24 separate from the supply/exhaust pipe 10, and its discharge port has a valve 25 and is located in the river channel. The operation is to enter the river channel and open the valve 25 to remove the drain inside the weir when there is no water flowing out.

For this reason, the supply/exhaust pipe 10 can be installed separately from the drain pipe 24, and as shown in the figure, there is no need to run the operation room along the slope and dig deep underground, which is economical.

However, since the drain outlet is located in the river channel, drain removal cannot be performed during floods, and there may be cases where the weir body does not completely collapse.

In FIG. 2, 26 is an exhaust valve, and 27 is a check valve.

(Structure of the Invention) In view of the above, the present invention has been developed to solve these problems. That is, the flexible membrane undulating weir of the present invention includes a drain box that connects to the weir body or its supply and exhaust pipe, a pressurizing device, an air supply pipe that connects the pressurizing device to the drain box, and a drain box that connects the pressurizing device to the drain box. The present invention is characterized by having a drain pipe which exits from the box, and a drain removal device which can increase the pressure in the drain reservoir box using a pressurizing device and remove the drain through the drain discharge pipe.

The invention will now be explained in detail with reference to the exemplary drawings. The flexible membrane undulating weir of the present invention is illustrated in FIG. In Fig. 3, 1 is a weir formed by the envelope, 10
13 is a supply and exhaust pipe, 13 is a blower, 14 is a slope, and 11 and 12 are manual valves, which are similar to the conventional flexible membrane undulating weir.

In the above, in the present invention, a drain reservoir box 4 and a pressurizing device (compressor) 9 are provided, and the box 4 is connected to a drain reservoir box connecting pipe 2.
It is also provided with a drain discharge pipe 6, which is connected to the supply/exhaust pipe 10 with a drain pipe 6. Moreover, the above-mentioned pressurizing device 9
is connected to the box 4 through an air supply pipe 5. Note that 3 is a check valve, 7 and 8 are manual valves, 15 is a check valve, and 16 is a drain outlet.

The operating procedure of this device will be shown below to help you better understand the mechanism of this device.

B. The drain inside the weir passes through the air supply pipe 10 on the river bed and the drain storage box connection pipe 2, and is stored in the drain storage box 4.

(b) To remove the drain from the drain reservoir box 4, open the valves 7 and 8.

The pressurizing device (compressor) 9 is activated.

The pressurized air passes through the air supply pipe 5 and increases the pressure in the drain reservoir box 4.

The water in the drain box 4 is pushed down by the pressure of B and is discharged through the drain outlet 16 through the drain outlet pipe 6.

C After drain removal is completed Close valves 7 and 8.

Stop the pressurizing device (compressor) 9.

Note that the present invention may be implemented as follows.

Although the drain reservoir box 4 is connected to the supply/exhaust pipe 10 through the connecting pipe 2, it may of course be connected to a weir body.

Further, in the present invention, the following procedure is generally performed.

A check valve 3 is provided in the connecting pipe between the drain reservoir box and the weir body or the supply/exhaust pipe to prevent fluid from moving from the drain reservoir box to the weir body side.

Alternatively, a check valve or a throttle pipe is provided at the bottom of the drain discharge pipe to prevent the fluid in the drain reservoir box from moving into the weir, thereby allowing the drain to be discharged at a pressure higher than the designed internal pressure of the weir. Further, in the above, the drain removal device makes the maximum operating pressure of the pressurizing device equal to or higher than the head difference between the drain outlet and the drain storage box.

Alternatively, the volume of the drain box is made larger than the internal volume of the discharge pipe.

Alternatively, the drain pipe is connected to the bottom of the drain box, and the drain box connecting pipe that connects the weir or its supply/exhaust pipe to the drain box is connected to the top of the drain box.

(Effect of the invention) As mentioned above, the present invention collects the drains in one place,
The drain can be pushed up and removed by pressurized air. This has the following advantages.

There is no need to install the drain discharge pipe horizontally from the river bed like in the past, and there is no need to worry about the strength of the embankment due to construction in the control room or under the embankment.
and construction costs will be lower.

There is no need to install a drain discharge pipe in the river channel, and drain can be discharged whenever necessary. It is also possible to discharge drains during outflows and floods, and the weir body can be completely collapsed so that it does not impede flood water flow.

The supply/exhaust pipe, the air supply pipe for drain removal, and the drain discharge pipe are separate, and all can be installed along the slope, resulting in low construction costs.

[Brief explanation of the drawing]

Figures 1 and 2a and 2b both illustrate illustrations of a flexible membrane undulating weir with a conventional drain removal device. Note that the diagram b in FIG. 2 is a YY cross-sectional view of the diagram a. FIG. 3 illustrates an explanatory view of the flexible membrane undulating weir of the present invention. 1... Weir body formed by the envelope of the flexible membrane undulating weir, 2... Drain reservoir box connection pipe, 3...
Check valve, 4... Drain reservoir box, 5... Air supply pipe, 6... Drain discharge pipe, 7, 8, 11, 1
2...Manual valve, 9...Compressor, 10...
Supply and exhaust pipe, 13...Blower, 14...Slope, 15
...Check valve, 16...Drain outlet, 17...
Control room.

Claims (1)

[Scope of Claims] 1. A drain box that connects to the weir or its supply and exhaust pipe, a pressurizing device, an air supply pipe that connects the pressurizing device to the drain box, and a discharge pipe that exits from the drain box. What is claimed is: 1. An undulating weir made of a flexible membrane, characterized in that it has a drain removal device capable of increasing the pressure in a drain storage box using a pressurizing device and discharging drain through a drain discharge pipe. 2. The flexible device according to claim 1, wherein the drain reservoir box connected to the weir body of the drain removal device or its supply/exhaust pipe is a drain reservoir box connected to the river bed portion of the weir body or the under-river bed supply/exhaust pipe. An undulating weir made of membrane. 3. The drain removal device is provided with a check valve or a throttle pipe in the connection pipe between the drain storage box and the weir body or the supply/exhaust pipe to prevent the fluid in the drain storage box from moving into the weir body, and to prevent the weir from moving into the weir body. The flexible membrane undulating weir according to claim 1, which is capable of discharging drain at a pressure higher than the designed internal pressure. 4. The flexible membrane undulation according to claim 1, wherein the drain removal device is provided with a check valve at the bottom of the drain discharge pipe to prevent fluid from moving from the discharge pipe into the drain reservoir box. Weir. 5. Claim 4, wherein the drain removal device is such that the maximum operating pressure of the pressurizing device is greater than or equal to the head difference between the drain outlet and the drain reservoir box.
The undulating weir made of flexible membrane as described in Section 1. 6. The flexible membrane undulating weir according to claim 1, wherein the drain removal device has a drain storage box with a volume larger than the internal volume of the discharge pipe. 7. A patent claim in which the drain removal device connects a drain pipe to the bottom of the drain box and a drain box connecting pipe connecting the weir body or its supply/exhaust pipe to the drain box to the top of the drain box. The flexible membrane undulating weir according to item 1.