JPS5869910A - Rising and falling device for flexible film dam - Google Patents

Abstract

PURPOSE:To allow the complete rising or falling of a flexible film dam capable of rising when being filled with a fluid and also of falling down when being evacuated by providing an exhaust pipe with a valve from which air is discharged and a drain pipe with a vlave from which water is discharged toward the downstream side. CONSTITUTION:When raising a rubber dam 1, a kind of flexible film dam, air is supplied into the rubber dam 1 through an air supply or discharge pipe 10 by means of a blower 8, whereupon the rubber dam 1 gradually expands. When adjusting the height of the rubber dam 1, air is gradually discharged from an exhaust pipe 11 by opening an exhaust valve 12 and then the exhaust valve 12 is closed at a desired dam height, whereby permitting a right height of the dam to be set up. Also, when falling down the rubber dam 1, the exhaust valve 12 and the drain valve 20 are opened manually. By this, air and water in the rubber dam 1 are each discharged from the exhaust pipe 11 and the drain pipe 16. Thus, the rubber dam 1 can be completely raised or fallen down.

Description

[Detailed Description of the Invention] This invention relates to a device for lowering a flexible membrane weir, and in particular, when air is introduced to raise it up, water enters as the air is discharged. The present invention relates to a device that completely collapses the membrane weir by climbing into the membrane weir.

Flexible silica membrane weirs, commonly referred to as rubber weirs, which expand or contract when fluids such as air or water are injected or discharged, are easy to implement and inexpensive, and are useful for intake of agricultural water and seawater dams at estuaries. It is becoming widely used. Such membrane weirs are roughly classified into air type and water type depending on the type of fluid enclosed. The pneumatic type does not require a water tank to store the injected liquid, has less friction loss to the supply and exhaust pipes during injection and discharge, and has a small mass, so it is cheaper and has a lower cost than the fluid type. It has the advantage of being short in time.

However, the pneumatic membrane weir has a drawback in that a V-shaped notch is formed between the membrane weir main body in the middle and the inclined parts on both sides along the slope. In order to compensate for this drawback, a compromise or semi-water type membrane weir has been proposed in which water is partially allowed to enter the pneumatic membrane weir. In such a compromise type, by opening the bottom of the membrane dam to the upstream side, a water tank and an injection pump are not required, and an increase in cost can be prevented.

However, in this type of hybrid type or semi-water type, when air is discharged due to lodging, the internal pressure of the membrane weir decreases, and water intrudes into the membrane weir by the amount lower than the weir high water head. This water intrusion will continue until the weir height head and internal pressure become equal.

Therefore, in such a semi-water type membrane weir? Although the weir height is lowered by discharging air, 1. It cannot be completely collapsed. This poses a problem in that the membrane weir cannot be completely automatically lowered even during periods of rest such as in abnormally high water levels.

The present invention relates to a device for collapsing a flexible membrane weir that eliminates such problems, and in a flexible membrane weir that rises when fluid is introduced and collapses when fluid is discharged, the bottom of the membrane weir is placed on the upstream side. When opened, there is an exhaust pipe with a valve for allowing air to exit from this membrane weir, and the membrane! A drainage pipe with a valve for discharging water to the downstream side of the membrane weir is installed at the membrane weir, and its purpose is to introduce air and prevent water from entering. The object of the present invention is to provide a structure in which a compromise type membrane weir is allowed to be completely collapsed.

The present invention has the above-mentioned configuration, and is particularly provided with an exhaust pipe having a valve for discharging air and a drain pipe having a valve for discharging water to the downstream side.
Air and water can be discharged by these pair of discharge means, respectively.

This makes it possible to completely collapse the membrane weir. Furthermore, by interlocking the valves of the exhaust pipe and the valves of the drain pipe with the abnormal water level detection means, it becomes possible to completely collapse the membrane weir and discharge water when the water level is abnormal.

Furthermore, since the present invention introduces air and water into the flexible membrane weir to make it erect, it is possible to prevent the formation of notches like those seen in membrane weirs that only allow air to be introduced. do not have. Further, the height of the membrane weir can be adjusted by introducing and discharging air, making it extremely easy to adjust the height, and the flow rate can also be adjusted freely.

An embodiment of the present invention will be described below with reference to diagrams. 1st
As shown in FIG. 1 and FIG. 2, rubber salt 1, which is a type of flexible membrane weir, is made by impregnating a strip of woven fabric made of synthetic fibers with an adhesive liquid, and then vulcanizing and molding it. ．． = The main component is made up of laminated rubber sheets. Then, with this sheet folded in half and stacked on top of each other, the folded side edge is positioned on the upstream side, and it is fixed to the surface 4 of the concrete 3 on the river bed in an airtight manner using the presser metal fitting and the fixing device 2. ing. Furthermore, the inclined parts ε extending in an almost triangular pyramid shape on both sides of the rubber salt l have their lower parts facing the slopes 6 on both banks of the river.
It is fixed by the same method as above. ″ Operation-7 is installed near this rubber salt l,
This operation room 7 is provided with a blower 8 . This blower 8 is connected to the inclined portion 5 of the rubber salt 1 through an air supply/exhaust pipe 10 having an air supply valve 9.

Then, this supply is sent to the trachea lO by rubber weir 1 from valve 9.
An exhaust pipe 11 is installed with a branch on the side.
Furthermore, this exhaust pipe 11 is provided with an exhaust valve '12.

- Inside the rubber salt 1, a spacer 13 made of a pie or the like made of a material that is difficult to deform is arranged, and is attached to the inner surface of the lower part of the rubber salt 1. Also rubber salt 1. An opening 14 is formed in the lower part of the tank, and a water suction pipe 15 and a drain pipe 16 are connected to this opening 14. The water suction pipe 15 is equipped with a water suction valve 17, and after being bent upward, the tip 18 is further bent in the F direction to prevent the intrusion of earth and sand, and is opened close to the surface '4 of the concrete 3 on the river bed. are doing'. The water intake valve 17 is kept closed when the rubber fill is operated as a pneumatic type, and left open when the weir height is to be adjusted. On the other hand, the drain pipe 16 is provided with a siphon 19□, and is opened to the downstream side of the rubber salt 1 via the siphon 19. At the bottom of both ends of the siphon 19, the drain pipe 16 is short-circuited via a drain valve.

The exhaust valve 12 and drain valve distribution are connected to the bucket 22 via wire 2, as shown in FIGS. 1 and 2. In FIGS. 1 and 2, for convenience, the valve 12 and the joint are directly connected to the wire 21, but the details are as shown in FIG. 3. That is, the wire 21 is supported rotatably around a support shaft n, and the other end is connected to one end of a lever δ that is pressed by a responsive coil spring. The claw at the end locks one end of a lever 28 fixed to the opening/closing operation shaft γ of the valve 12, and a weight 4 is attached to the other end of the lever path.The same applies to the drain valve head. and is associated with wire 21.

The bucket 22 is adapted to receive water from the water injection pipe I branched from the water suction pipe 15.

In the above-described configuration, when the rubber salt 1 is to be erected, the blower I8 may be driven to feed air into the rubber dam 1 through the supply/exhaust pipe 10. At this time, keep the drain valve head closed. Since the water suction pipe 15 is located under the riverbed, there is still water remaining therein, so the water suction valve 17 may be left open. In addition, since water remains in the drainage pipe 16 under the river bed on the side of the opening 14 from the siphon 19, air does not escape through the siphon 19. The rubber salt 1 expands as air is blown. The water level above the rubber salt 1 on the flow side gradually rises, but the rubber salt 1 completely stands up at t, when the internal pressure required for the rubber salt 1 to expand is lower than that water level. In addition, if the inside of the rubber weir becomes overpressure,
The water is turned off through the suction pipe 15, and the siphon 1
9 so that there is no risk of bursting due to overpressure.

When adjusting the weir height of rubber salt 1, use the exhaust valve 1.
2 to gradually exhaust the air from the exhaust pipe 11. As a result, water enters the rubber weir 1, resulting in a semi-water type, which reduces the V-notch when the weir height is lowered. This can be prevented from occurring.The exhaust valve 1 can be removed at the desired weir height.
By closing 2, the correct weir height is set. If the height of the weir at full water level and in warm conditions is, for example, 100 cm, and the pressure inside rubber weir 1 at this time is 100%, then the weir height is 85a when the internal pressure is 50%, and when the internal pressure is 25%. It was confirmed through experiments that the height of the weir was stable at 6'5 cm. and the weir height is 85 crIL and 6 crIL respectively.
At 5cIIL, the water levels entering the rubber weir 1 were 35cIrL and 40cR, respectively, and it was confirmed that the water entered as the weir height became lower.

- Next, when this rubber salt 1 is toppled, use the exhaust valve 1 as shown in 4.
2 and the drain valve head may be opened manually.

As a result, the air and water within the rubber dam are discharged through the exhaust pipe 11 and the drain pipe 16, respectively.

In this way, in the rubber salt 1 of this embodiment, in addition to the exhaust pipe 11 for releasing air, the drain pipe 16 is also provided, so that air and water can be drained at the same time. As a result, water will not enter and prevent lodging. Therefore, complete lodging can be performed.

Further, when the water level reaches an abnormal level, both the exhaust valve 12 and the drain valve I are released to the side, and the rubber salt 1 is lowered in the same manner as described above.

That is, when the water level on the upstream side of the rubber salt 1 exceeds a predetermined value, water from the tip 18 of the water suction pipe 15 is poured into the packet n through the water injection pipe. Therefore, the weight of this packet B increases, the lever 5 is rotated against the coil spring, and the locking of the lever by the pawl is released. Therefore, the lever y is rotated by the lever 29, and the valve 12 is opened. The drain valve head, which is connected to the wire 21 through a similar mechanism, is opened as well, so that air and water are discharged through these valves 12, and the rubber salt 1 is completely collapsed. Water discharge will take place.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rubber salt according to an embodiment of the present invention, and FIG.
The figure is a cross-sectional view of the same side, and FIG. 3 is an enlarged front view of the abnormality detection mechanism. 1...Rubber salt, 2...Fixing tool, 3...Concrete, 4...Surface, 5...Slope, 6...Slope, 7
...Operation room, 8...Blower, 9...Air supply valve, 10
... Supply and exhaust pipe, 11... Exhaust pipe, 12... Exhaust valve, 13... Spacer, 14... Open q115... Water intake pipe, 16... Drain pipe, 17... Water intake valve, 18...
・Tip, 19...siphon, addition...drain valve, 21.
...Wire, 22...Bar 7), Z3...Spindle, 2
4...Compression coil spring, 5...Lever, song--claw, n...Opening/closing operation shaft, 3...Lever, 4...Weight, addition...Water pipe. Attorney: Patent Attorney Nozomi Ehara 1-person procedural amendment December 16, 1980 Haruki Shimada, Commissioner of the Patent Office Indication of Case 16 ['1056 Patent Application No. 167922 2 Title of Invention: Lodging Device for Flexible Membrane Weir 1 Relationship with the case of the person making the amendment Patent applicant TL:' +i 10-1 Kyobashi-chome, Chuo-ku, Tokyo Address (Takemoto Building) 03-501-%216 Increase in patents due to amendment! Number of 1: None Figures 1 and 2 of the original drawings will be replaced with attached drawings. Figure 1 1υ Figure 2

Claims (1)

[Claims] The exhaust pipe has a mouth that rises when fluid is fed and collapses when discharged, and has a valve for discharging air from the membrane weir, and a valve for discharging air to the downstream side of the membrane weir. A system for lodging a flexible membrane weir, comprising: a drainage pipe provided on the membrane weir.