JPH0424486B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides an improvement to a lodging device based on the upstream water level in a flexible membrane undulating weir, specifically a multi-span type flexible membrane undulating weir. This is related to the added weir.

(Prior art) An undulating weir made of a flexible membrane is a weir in which a flexible membrane envelope (bag-like body) such as rubber-coated cloth forming the weir body is attached to at least the floor of a river in a direction across the flow of the river. Attach to,
A pressure medium such as air, water, or both of these is introduced into the interior of the envelope to expand and erect the envelope, and a pressure medium is discharged from the interior of the envelope to cause the envelope to contract and fall down. No. 40-11702, Tokko Akira
44-2371).

When installing this type of undulating weir, it may be of a multi-span type. In other words, in the case of a large river, multiple weirs, such as two, three, etc., are connected via weir pillars, rather than one weir, across the width of the river. It may be of span type. This includes water level, flow rate adjustment, removal of accumulated sediment,
This is done for reasons such as ease of river closure work.

In the above multi-span weir lodging method,
As shown in FIG. 6 or FIG. 7, conventionally, each weir forming one span (hereinafter abbreviated as one-span forming weir) has a lodging device without interlocking with the others, and each one-span forming weir is determined individually. When the water level reached the upstream level, it would collapse.

In addition, FIG. 6 shows the case where the lodging device is a bucket type, and when the upstream water level reaches the automatic lodging water level _L1 , the upstream water W is guided to the buckets 11a and 11c, the buckets 11a and 11c are lowered, and the butterfly valve 8 is activated.
a, 8c are opened to contract the envelopes 1a, 1c.

Furthermore, when the upstream water level reaches the automatic lodging water level _L2 , the upstream water W is guided to the bucket 11b, and the bucket 1
1b descends and opens the butterfly valve 8b to cover the envelope 1.
Contract b.

Fig. 7 shows a case where the lodging device is a float type, and when the upstream water level reaches the automatic lodging level _L1 , the upstream water W enters the float tanks 21a, 21b, 21c, and the floats 24a, 24b, 24c are at the same level. The butterfly valves 8a and 8c are opened by rods 22a and 22c connected to floats, and the envelope 1
Contract a and 1c.

Furthermore, when the upstream water level reaches the automatic collapse water level _L2 , the butterfly valve 8b is opened by the rod 22b connected to the float 24b, and the envelope 1b is contracted.

Note that in these FIGS. 6 and 7, the same reference numerals as in FIGS. 1 to 5 of the present invention, which will be described later, indicate the same parts.

(Problems to be Solved by the Invention) As described above, with the conventional method, it was not possible to determine the order of lodging of each one-span forming weir unless a water level difference was established at the time of lodging.

However, without creating a difference in water level at the time of lodging, 1
It is desired to set the order of lodging each of the span-forming weirs, for example, to lodge one span at a time or a plurality of spans at a time, for the following reasons.

Once a weir collapses due to flooding during droughts or a river with a gentle slope, even if it rises again, it takes time for the water to be stored upstream, causing problems in water intake. Therefore, depending on the rate of increase in the amount of river water, for example, one span at a time or a plurality of spans at a time may be lowered to prevent the water storage upstream from being reduced as much as possible.

Water intake weirs for electricity and water need to be used constantly. Therefore, ensure a constant water level on the upstream side,
Even when water comes out, all the spans are not lowered at the same time, but one span at a time or a plurality of spans are lowered depending on the rate of increase in the river flow rate, so that the water level can be maintained even if there is a small amount of water.

In view of the above-mentioned problems, the present invention provides a multi-span type flexible membrane undulation weir, in which the water level of each of the weirs forming one span can be made the same and arranged in the same order. The objective is to provide a closed undulating weir.

(Means for Solving the Problems) That is, one of the flexible membrane undulating weirs of the present invention includes attaching a flexible membrane sheath forming a weir body to a river bed,
Multiple weirs are connected via weir pillars in the direction across the river flow by sending air, water, etc. as pressure medium into the inside of the sheath to expand and raise it up, or discharge air, water, etc. from the inside of the sheath to contract and collapse. A multi-span type weir is constructed, and each weir forming one span receives upstream water taken in by an upstream water level detection pipe into the respective buckets of the weir forming one span, and the lowering of the buckets lowers the span. Forming at least one single span in a weir equipped with a lodging device that opens the exhaust or drain valve of an exhaust or drain pipe communicating with each envelope of the weir to be formed and deflates the envelope at a predetermined water level. The upstream water level detection pipe is directly connected to the bucket of the weir, and the pipe from the bucket of the weir forming one span other than the own is connected to the bucket of the weir forming at least one other span. This is a characteristic feature.

In addition, another flexible membrane undulating weir of the present invention has a flexible membrane envelope forming a weir body attached to the river bed, and air, water, etc. as a pressure medium is sent inside the envelope to expand the weir. A multi-span type weir is constructed by connecting multiple weirs that are erected or that discharge air, water, etc. from the inside of the envelope and then contract and collapse in a direction that crosses the river flow through weir pillars. Each of the weirs formed is capable of handling upstream water taken in by the upstream water level detection pipe.
into each float tank of the weir forming the span,
In a weir equipped with a lodging device that deflates the envelope at a predetermined water level by opening the exhaust or drain valve of the exhaust or drain pipe communicating with each envelope of the weir forming one span by raising the float, at least The upstream water level detection pipe is directly connected to the float tank of the weir forming one span, and the float tank of the weir forming at least one other span is connected to the float tank of the weir forming one span other than the own. It is characterized by the fact that the pipes from the

(Function) As is clear from the explanation of the illustrative drawings described below, the present invention has the following features:
By connecting buckets or float tanks with each other by the detected upstream water as described above, it is possible to determine the order of one-span forming weirs in lodging at the same upstream water level (without using different upstream water levels).

In addition, in the case where it is necessary to change the water level of the lodging according to the lodging order in the present invention, if the lodging device is a bucket type, by changing the level of the connecting pipe of the buckets, the lodging level of each of the one-span forming weirs can also be changed. can.

The present invention will be explained in detail below using exemplary drawings.

[A] Example of using a bucket-type lodging device It is a diagram.

In Fig. 1, 1a, 1b, 1c... are each one of the flexible membrane undulating weirs (one span forming weir), and these are connected in the river cross direction via weir pillars 2a, 2b... It forms a multi-span type weir.

3 is a blower, and air supply pipes 4a, 4b, 4c
Air is supplied to the one-span forming weirs 1a, 1b, 1c, etc. through the supply and exhaust pipes 5a, 5b, 5c, etc., and the weirs can be erected.

Also, the supply and exhaust pipes 5a, 5b, 5c... and the exhaust pipe 6
The air within each of the one-span forming weirs 1a, 1b, 1c... can be discharged through the weirs 1a, 1b, 1c, .

Note that 7a, 7b, 7c, etc. are air supply valves, 8
a, 8b, 8c... are exhaust valves, and 9 is an air supply source valve.

The present invention is particularly designed as follows.

Upstream water W led from the upstream water level detection pipe 10 installed from the riverbank slope upstream of the weir is first led to the bucket 11a of the first one-span forming weir 1a, and then to the second one-span forming weir 1b. Bucket 11b
Then, the bucket 1 of the third one-span forming weir 1c
1c, and so on.

At this time, the bucket is sequentially lowered, and the wires 12a, 12b, 12c, . . . connected thereto sequentially open the lever-type butterfly valves 8a, 8b, 8c, .

By sequentially opening the exhaust valves 8a, 8b, 8c..., the air inside the one-span forming weirs 1a, 1b, 1c... is sequentially exhausted, and the one-span forming weirs 1a, 1
b, 1c... are also ordered sequentially (1a first, 1
b is the next, 1c is the last), and as long as the upstream water level exists, it contracts and collapses.

Note that 13a, 13b, 13c... are pulleys, 14
a, 14b, 14c are valves, 15a, 15b,
15c... is a flexible pipe, and 16 is a drain valve provided in the upstream water level detection pipe 10.

Example A-2 Fig. 2 is a diagram illustrating the main part of another example of the present invention in which a bucket-type lodging device is used, as seen from downstream to upstream of the river flow. The same symbols as in FIG. 1 represent the same parts.

The difference between FIG. 2 and FIG. 1 is that upstream water is directly led to the bucket 11c from the upstream water level detection pipe 10.

Therefore, in Figure 2, 1 span forming weir 1
A, 1c and the one-span type weir 1b are placed in sequence (11b is the last), and they are contracted and collapsed as long as the upstream water level exists.

[B] Example of using a float type as a lodging device B-1 Figure 3 shows the main part of an example of using a float type as a lodging device according to the present invention, and shows the river flow from downstream to upstream. This is a close-up view.

In Fig. 1, 1a, 1b, 1c... are each one of the flexible membrane undulating weirs (one span forming weir), and these are connected in the river cross direction via weir pillars 2a, 2b... It has been installed to form a multi-span type weir.

3 is a blower, and air supply pipes 4a, 4b, 4c
Air is supplied to the one-span forming weirs 1a, 1b, 1c, etc. through the supply and exhaust pipes 5a, 5b, 5c, etc., and the weirs can be erected.

Also, the air supply exhaust pipes 5a, 5b, 5c... and the exhaust pipe 6
1 span forming weir 1 via a, 6b, 6c...
The air in a, 1b, 1c, . . . can be discharged, and each one-span forming weir can be collapsed.

Note that 7a, 7b, 7c, etc. are air supply valves, 8
a, 8b, 8c, . . . are exhaust valves, and 9 is an air supply valve (the above is the same as in FIG. 1).

The present invention is particularly designed as follows.

The upstream water W led from the upstream water level detection pipe 10 installed from the river bank slope upstream of the weir is first led to the float tank 21a of the first one-span forming weir 1a,
Next, the float tank 21 of the second one-span forming weir 1b
b, then to the float tank 21c of the third one-span forming weir 1c, and so on.

At this time, the floats 24a and 24 in each float tank
b, 24c... are the rods 22a, 22 due to the floats
b, 22c, the exhaust valve 8 is
Counter weights 23a, 23b, 23c, etc. attached to a, 8b, 8c,... are pushed up one after another.

As the counterweight rises, the exhaust valves 8a, 8b, 8c... are sequentially opened, and the air in the one-span forming weirs 1a, 1b, 1c... is sequentially exhausted, and the one-span forming weirs 1a, 1b, 1c... are sequentially exhausted. In order (1a first, 1b next, 1
c is the last), it contracts and collapses as long as there is an upstream water level.

Note that 16 is a drain valve provided in the upstream water level detection pipe 10.

Although the present invention has been described above with respect to an air-expandable type, the present invention can also be used in a water-expandable type, as shown in FIG.

In Fig. 4, 1a, 1b, 1c... are 1-span forming weirs, 2a, 2b... are weir columns, 10 is an upstream water detection pipe,
16 is a drain valve installed in the upstream water level detection pipe, 21
a, 21b, 21c... are float tanks, 24a, 2
4b, 24c... are floats, 33 is a water supply machine, 34
a, 34b, 34c... are water supply pipes, 35a, 35
b, 35c... are water supply and drainage pipes, 36a, 36b, 36
c... represents a drain pipe, 37a, 37b, 37c... represent a water supply valve, and 38a, 38b, 38c represent a drain valve.

In this case, the lodging device is, for example, a drainage pipe 36a instead of the upper exhaust pipe 6a (see Fig. 3).
wires 32a are attached to the floats 24a instead of the float rods 22a attached to the floats (see Fig. 3), and guided downward via pulleys 13a.
Drain valves 38a... provided at 6a... can be opened.

Example B-2 FIG. 5 is a diagram illustrating the main part of another example of the present invention in which a float-type lodging device is used, viewed from the downstream to the upstream of the river flow. The same symbols as in FIG. 1 represent the same parts.

The difference between Fig. 5 and Fig. 3 is the float tank 21c.
The point is that the upstream water is directly led from the upstream water level detection pipe 10.

Therefore, in Fig. 5, 1 span forming weir 1
A, 1c and the one-span type weir 1b are placed in order (1b is the last), and they are contracted and collapsed as long as the upstream water level exists.

(Effects of the Invention) As described above, according to the present invention, in a multi-span type flexible membrane undulating weir, each one-span forming weir can be easily undulated in a preset order and at the same water level. I can do it.

Note that the present invention is not limited to what is illustrated in the drawings, and the means for sequentially lodging may be one that sequentially lodges one span or a plurality of spans depending on the rate of increase in river flow rate, or one span and one span. It can be broadly interpreted as a combination of multiple spans that are laid down in sequence.

Furthermore, the present invention can be applied to both air expansion type and water expansion type.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of a flexible membrane undulating weir in which a bucket type is used as the lodging device of the present invention, and Figures 3, 4, and 5 are illustrations of the present invention in which a float tank is used as the lodging device. The explanatory diagrams of the flexible membrane undulating weir in the case of Figure 6 is an explanatory diagram of a conventional undulating weir made of flexible membrane when a bucket type is used as the lodging device, and Figure 7 is an explanatory diagram of a conventional undulating weir made of flexible membrane when a float tank is used as the lodging device. Explanatory diagrams of undulating weirs are shown as examples. 1a, 1b, 1c, etc...1 span forming weir, 2
a, 2b, etc...Weir pillar, 8a, 8b, 8c, etc...Exhaust valve (lever type rosefly valve), 10...
...Upstream water level detection tube, 11a, 11b, 11c, etc.
...Bucket, 12a, 12b, 12c, etc....Wire, 21a, 21b, 21c, etc....Float tank,
22a, 22b, 22c, etc...Float rod, 24
a, 24b, 24c, etc...Float.

Claims (1)

[Scope of Claims] 1. A flexible membrane envelope forming a weir body is attached to the riverbed, and air, water, etc. as a pressure medium is sent inside the envelope to cause it to expand or rise, or air, water, etc. are supplied from inside the envelope. A multi-span weir is constructed by connecting multiple weirs for discharging and contracting water in a direction across the river flow via weir pillars, and each weir forming one span is connected to an upstream water level detection pipe. Upstream water taken in by 1
The water is placed in the buckets of each of the weirs forming a span, and when the buckets are lowered, the exhaust or drain valves of the exhaust or drain pipes communicating with the envelopes of the weirs forming one span are opened, and the envelopes are contracted at a predetermined water level. In a weir equipped with a lodging device, an upstream water level detection pipe is directly connected to the bucket of the weir forming at least one span, and a water level detection pipe other than the self is directly connected to the bucket of the weir forming at least one other span. An undulating weir made of a flexible membrane, characterized in that pipes from the buckets of the weir forming one span of the weir are connected. 2. A flexible membrane envelope forming a weir body is attached to the river bed, and air, water, etc. as a pressure medium is sent inside the envelope to expand and erect it, or air, water, etc. are discharged from the interior of the envelope to cause it to contract and fall down. A plurality of weirs are connected via weir pillars in the direction across the river flow to form a multi-span weir, and each weir forming one span can handle upstream water taken in by an upstream water level detection pipe.
into each float tank of the weir forming the span,
In a weir equipped with a lodging device that deflates the envelope at a predetermined water level by opening the exhaust or drain valve of the exhaust or drain pipe communicating with each envelope of the weir forming one span by raising the float, at least The upstream water level detection pipe is directly connected to the float tank of the weir forming one span, and the float tank of the weir forming at least one other span is connected directly to the float tank of the weir forming one span other than the own. An undulating weir made of flexible membrane characterized by connecting pipes.