JPS59145812A - Baggy valve of culvert - Google Patents

Abstract

PURPOSE:To make the opening and closing of a culvert easier by providing a highly flexible and flatly contractible baggy body in the culvert. CONSTITUTION:The lapped open edges 6 of a baggy valve 5 are contacted with the bottom 2a and both sides 2b of the inside of a culvert 2 and then water- tightly attached with anchor bolts 8 and nuts 9 through a presser metal 7. When closing the culvert 2, the baggy valve 5 is inflated with air through an air supply and discharge valve 10, and also when opening the culvert 2, the air in the baggy valve 5 is discharged. The lowering of the function of the valve by foreign matters in the culvert 2 can thus be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bag-like valve for opening and closing an underdrain.

In cut-off weirs, commonly referred to as dams, after a period of time has elapsed after construction, earth and sand accumulates, reducing the amount of water stored and significantly impairing the function of the cut-off weir.

In order to eliminate such inconveniences, conventionally, as shown in FIG. Since a watertight seal is achieved by contacting the sealing portion 02, it is necessary to form the sealing portion 02 in the dark lot either integrally or separately. Therefore, slide the valve body 03 upward, open the gate valve,
When attempting to close the valve body 03 after flushing away deposits such as earth and sand, the earth and sand stuck in the sole portion 02 may prevent the valve body 03 from being closed. In addition, the sole portion 0
2, and even if the valve body 03 was almost completely occluded, a complete sole could not be formed.

However, if a butterfly valve is used, the above-mentioned situation can be avoided because there is no need to dig into the seal part. As a result, there was a risk that the flowing earth and sand would collide with the valve body, causing the valve body to wear out over a long period of use, or even being damaged by collisions with boulders.

Although the above conventional examples have been explained with respect to gate valves for dams, similar problems also occur in gate valves used in sand settling basins of power plants and sand settling basins for water supply.

The present invention relates to the invention of an underdrain valve that eliminates such drawbacks, in which a flexible membrane is folded in half to form a bag-like body,
The overlapping edges of the bag-like body are watertightly attached to the upstream side of the inner circumferential surface or a part of the inner circumferential surface of the culvert, and the bag-like body is filled with fluid and inflated to close or drain the culvert. The special feature is that a means for opening the underdrain is provided, and its purpose is to provide a bag-like valve whose valve function will not be impaired by foreign matter in the underdrain.

As described above, the present invention forms a bag-like body by folding the flexible membranes in half, and the overlapping edge Ys of the bag-like body has a watertight seal on the inner circumferential surface or a part of the inner circumferential surface upstream of the inner circumferential surface. The bag-like body is filled with fluid and inflated to close the dark flame, or is discharged to open the dark flame. By inflating the bag-like body, the central sides of the underdrain of the bag-like body can be brought into close contact with each other and the underdrain can be reliably sealed.

Further, in the present invention, by discharging the fluid from the bag-like body filled with the fluid, the bag-like body can be contracted and the underdrain can be opened.

In this way, in the present invention, the bag-like body is simply expanded:
The underdrain connection can be opened and closed extremely easily simply by contracting fT-.

In addition, in the present invention, the underdrain is closed with a highly flexible bag-like valve, so even if a small foreign object is caught in the bag-like valve, the watertight pipe will be maintained regardless of the foreign object. Shiuro.

Roughly speaking, in the present invention, a highly flexible bag-like body that can be flattened and contracted is simply laid in the underdrain, so when the underdrain is opened, the inner circumferential surface of the underdrain is almost smooth. As a result, even if the amount of drainage flowing through the dark space is small, a large amount of accumulated sediment can be efficiently removed.

An embodiment of the present invention illustrated in FIGS. 2 to 6 will be described below.

1 is a concrete dam for water storage, which is a cut-off weir built across a river. At the bottom of the concrete dam 1, a dam 12 with a rectangular cross section is formed to communicate the upstream and downstream sides. The earth and sand 3 accumulated on the upstream side of the dam 1 are discharged to the downstream side of the dam by passing through it together with the water storage 4.

Further, the overlapping open edge 6 of the bag-shaped vP body 5 (to be described later) facing upstream is brought into contact with the bottom surface 2a and both side surfaces 2b of the gravel 2, the presser foot 7 is applied to this, and the anchor bolt 8 and nut are tightened. The bag-shaped typeface 5c is made by folding in half a rubber sheet embedded with a reinforcing layer made of one or more belt-shaped woven fabrics made of cotton, synthetic fibers, etc. or fiber hoods, etc. or those made by folding the unvulcanized rubber sheet h with the reinforcing layer embedded in it in two by sandwiching a release agent, pressing it with a hot plate to vulcanize it, and giving it a two-fold habit. 1. It is configured.

Also, a condenser 4 is located adjacent to the location where the bag-like rod 5 is arranged.
A supply/exhaust pipe 10 is buried within the cleat dam 1, one end of which is connected to the inside of the bag-like valve body 5 via a joint 11, and the other end of the supply/exhaust pipe 10 is connected via a gate valve 12. The lower part of the supply and exhaust pipe 10 is connected to the blower 13, and the lower part of the supply and exhaust pipe 10 is connected to the blower 13.
'a? By driving the blower 13 with the exhaust valve 14 closed and the gate valve 12 open, air is forced into the bag-shaped valve body 5 to inflate it. By opening the exhaust valve 14,
The bag-shaped valve body 5 can be contracted and the drain inside the bag-shaped valve body 5 can be discharged.

Since the embodiment shown in FIGS. 2 to 6 iC is constructed as described above, after the bag-like valve body 5 is inflated,
When the gate valve 12 and the exhaust valve 14 are closed, the bag-shaped valve body 5
In this case, the central side surfaces 5a can be brought into close contact with each other, and the same side surfaces 5a can be brought into close contact with the top surface 2C of the culvert, thus closing the culvert 2.

Further, when the exhaust valve 14 is opened in a state where the bag-like valve body 5 is inflated and the underdrain 2 is closed, the pressurized air and drain inside the bag-like valve body 5 are discharged, and the drain is discharged from the bag-like valve body 5. 5 is contracted as shown in FIG. 6, and the dark (2) is opened.

When the culvert 2 is open, the water 4 blocked by the concrete dam 1 flows through the culvert 2 with great force, and the water force causes the sediment accumulated on the upstream side of the dam 1 to flow through the culvert 2 into the culvert 4. The accumulated soil on the upstream side of the concrete dam 1 can therefore be easily discharged.

In the open state of the culvert 2, the bag-shaped valve body 5 comes into close contact with the bottom surface 2a and both side surfaces 2b of the culvert 2 due to the water pressure in the culvert 12, so that the cross-sectional shape and area of the culvert 2 are There is no change in the left direction in the longitudinal direction of 2, and there is no local accumulation of soil within 2.

Therefore, when the bag-like valve body 5 is inflated after discharging the accumulated soil on the upstream side of the dam l, even if the accumulated soil is caught by the valve body 5, the culvert 2 is reliably closed regardless of this. be able to.

If the dark/east 2 becomes deeper, it is only necessary to increase the pressure of the injected air when the bag-shaped valve body 5 is inflated.

Furthermore, since the bag-shaped valve body 5 is made of rubber, it can sufficiently withstand the friction of discharging accumulated earth and sand, and has a long life.

In the embodiment shown in FIGS. 2 to 6, the bag-shaped valve body 5 of a certain length has a bottom surface 2a and both side surfaces 2bVc of the straw 2.
The endless bag-shaped valve body 2 as shown in FIG.
5 as shown in FIG.
It may be stretched over c.

In the embodiment shown in FIGS. 7 to 11, a conventional rubber weir 21 is installed on the top of the concrete water intake.
This is an application of the present invention.

In this embodiment, except for the gate valve and the exhaust valve, the supply and exhaust system for the rubber salt 21 and the supply and exhaust system for the endless bag-shaped valve body 5 can be shared, so that the increase in cost is small.

In addition, in the expanded state of the endless bag-like valve body 5, only the side surfaces 25a of the culvert center of the bag-like valve body 25 are in close contact with each other, so that it is dark (2
can be more easily and reliably shut off.

In the embodiments shown in FIGS. 2 through 6° and FIGS. 7 through 11, the cross-sectional shape of 2.22 was rectangular, but it could also be circular or any other suitable shape. The present invention can be applied.

[Brief explanation of the drawing]

Fig. 1 is an enlarged vertical cross-sectional view of the main part of a conventional water stop weir bottom sediment discharge device, and Fig. 2 is a schematic longitudinal cross-sectional side view of the main part illustrating an embodiment of the bag-shaped body valve for dark collection according to the present invention. , FIG. 3 is a partially cutaway perspective view of the same embodiment, FIG. 4 is a longitudinal sectional side view of the main part of FIG. 2, and FIG. 5 is a cross-sectional front view cut along the v-v line in FIG. 4. , FIG. 6 is a longitudinal sectional side view showing the contracted state of the embodiment, FIG. 7 is a longitudinal sectional side view illustrating another embodiment of the present invention, and FIG. Fig. 9 is a partially cutaway perspective view of the same embodiment, Fig. 10 is a longitudinal sectional side view of the main part of the same embodiment, and Fig. 11 is a cross-sectional front view cut along the line Xl-Xl in Fig. 10. . 1... Concrete dam for water storage, 2... Dark 4.3.
...Earth and sand, 4...Water storage, 5...Bag-shaped valve body, 6...
Overlapping open edge, 7... Presser foot, 8... Anchor bolt, 9... Nut, lO... Supply/exhaust pipe, 11...
・Joint, 12...Gate valve, 13...Blower, 14.
...exhaust valve, addition...concrete intake weir, 21...rubber! , 22
...Dark East, Otsu...earth and sand 24 mountain water storage, 5...endless bag-shaped valve body, 26...overlapping open edges, d...presser foot, fat...anchor bolt, 4... ...Natsuto, 3o...
・Supply and exhaust pipe, 31...Joint, 32...Gate valve, 33
...Blower, 34...Exhaust valve. Agent: Patent attorney Nozomi Ehara (1 person)

Claims (1)

[Claims] The flexible membrane is folded in half to form a bag-like body, and the overlapping edges of the bag-like body are watertightly attached to the inner circumferential surface or a part of the inner circumferential surface of Dark 1 on the upstream side of the bag-like body. A two-drain bag-shaped body valve characterized by being provided with a means for filling the body with fluid and expanding it to close the culvert, or for discharging the fluid to open the culvert.