JPS5837448B2 - Flexible membrane undulating weir - Google Patents
Flexible membrane undulating weirInfo
- Publication number
- JPS5837448B2 JPS5837448B2 JP4112081A JP4112081A JPS5837448B2 JP S5837448 B2 JPS5837448 B2 JP S5837448B2 JP 4112081 A JP4112081 A JP 4112081A JP 4112081 A JP4112081 A JP 4112081A JP S5837448 B2 JPS5837448 B2 JP S5837448B2
- Authority
- JP
- Japan
- Prior art keywords
- envelope
- air
- tank
- flexible membrane
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012528 membrane Substances 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000002265 prevention Effects 0.000 claims description 14
- 230000008602 contraction Effects 0.000 claims 1
- 210000004779 membrane envelope Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/005—Deformable barrages or barrages consisting of permanently deformable elements, e.g. inflatable, with flexible walls
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Barrages (AREA)
Description
【発明の詳細な説明】
本発明は可撓性膜製起伏堰詳しくは過圧防止装置である
エアーブローオフタンクを備える可撓性膜製起伏堰の改
良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an undulating weir made of a flexible membrane, and more particularly to an improvement of an undulating weir made of a flexible membrane equipped with an air blow-off tank serving as an overpressure prevention device.
可撓性膜製の、例えばゴム引布製の包被（袋状体）を河
川を横断する方向に河床に取り付け、包被内部に空気を
注入、排出することにより起伏を可能にした起伏堰（例
えば特公昭４０−１１７０２号、特公昭４４−２３７１
号参照）について、在来のその作動を第１図に基づき説
明すると一般に次の通りである。An undulating weir (a bag-shaped body) made of a flexible membrane, such as a rubber-coated cloth, is attached to the river bed in the direction across the river, and air is injected into and discharged from the inside of the envelope, making it possible to rise and fall. For example, Special Publication No. 40-11702, Special Publication No. 44-2371
The conventional operation of the (see No. 1) is generally explained as follows based on Fig. 1.
送気用フロアー２により注排気管５を介して包被１内に
空気を送気して膨張させる、そして上流水位があらかじ
め設定された倒伏水位に達したときは排気弁６が自動的
に開放され包被１内の空気を自然に排気し倒伏する。The air supply floor 2 supplies air into the envelope 1 through the inlet/exhaust pipe 5 to cause it to expand, and when the upstream water level reaches a preset collapse water level, the exhaust valve 6 is automatically opened. Then, the air inside the envelope 1 is naturally exhausted and it is laid down.
又送気時に包被１内の空気が過圧になることを防止する
為にエアーブローオフタンク３を設け過剰空気を過圧防
止管４を介して排出する安全装置を設けている。In addition, in order to prevent the air within the envelope 1 from becoming overpressured during air supply, an air blow-off tank 3 is provided, and a safety device is provided to discharge excess air through an overpressure prevention pipe 4.
しかしながら堰の倒伏時間を早くする等の理由により包
被内の空気を強制的に排気する場合には在来の如き構造
では包被１の空気を排出した後排気用ブロアーの適当な
停止装置を設けないとエアーブローオフタンク内の水８
が過圧防止管４及び注排気管５を通じて排出される欠点
がある。However, when the air inside the envelope is forcibly exhausted for reasons such as speeding up the lodging time of the weir, the conventional structure requires an appropriate stop device for the exhaust blower after exhausting the air from the envelope 1. If not installed, water in the air blow-off tank 8
There is a drawback that the gas is discharged through the overpressure prevention pipe 4 and the inlet/exhaust pipe 5.
なお上記包被内空気をフロアーにより強制排出する方法
は、例えば送風用フロアー２とは別の排気用ブロアー７
を設け注排気管内に設けた例えば電動弁７，Ｔを開閉す
る（７は注気時開、排気時閉、γ′は注気時閉、排気時
開）ことによって可能である。Note that the above-mentioned method of forcibly discharging the air inside the envelope using the floor is, for example, using an exhaust blower 7 that is separate from the ventilation floor 2.
This is possible by opening and closing, for example, electric valves 7 and T provided in the injection and exhaust pipe (7 is open when injecting air and closed when exhausting air; γ' is closed when injecting air and open when exhausting air).
本発明は上記欠点を解消するべくエアーフローオフタン
クに挿入する過圧防止管あるいは注排気管を改良したも
のである。The present invention improves the overpressure prevention pipe or the inlet/exhaust pipe inserted into the air flow off tank in order to eliminate the above-mentioned drawbacks.
以下例示によって本発明を詳細に説明する。The present invention will be explained in detail below by way of examples.
本発明は、タンクに挿入する過圧防止管の最高レベルと
エアープローオフタンク内の水面の包被内の空気の強制
排出に起因する最低レベルとの差に相当する水柱に換算
される圧力をブロアーの最犬吸込圧力より大きくするこ
とにより包被内の空気を強制排出する時にエアーフロー
オフタンクの水が排出されることを防止したことを特徴
とするものである。The present invention calculates the pressure in terms of water column corresponding to the difference between the highest level of the overpressure prevention pipe inserted into the tank and the lowest level caused by the forced evacuation of air within the envelope of the water surface in the air blow-off tank. This is characterized in that water in the air flow off tank is prevented from being discharged when the air inside the envelope is forcibly discharged by setting the pressure to be higher than the maximum suction pressure of the blower.
尚、上記改良は例えば注排気管に連結された管がエアー
ブローオフタンクに挿入されている場合はこの連結管に
ついても適用できる。Incidentally, the above-mentioned improvement can also be applied to the connecting pipe, for example, when the pipe connected to the inlet/exhaust pipe is inserted into the air blow-off tank.
以下上記本発明を第２図について更に説明する。The present invention will be further explained below with reference to FIG.
第２図において、３はエアーブローオフタンク、４は過
圧防止管又は注排気管、８は水である。In FIG. 2, 3 is an air blow-off tank, 4 is an overpressure prevention pipe or an inlet/exhaust pipe, and 8 is water.
まずエアーブローオフタンク３内に水８をレベルＬ２の
高さまで給水しておく。First, water 8 is supplied into the air blow-off tank 3 to a level L2.
次に包被内空気をブロア７により強制排出して行き包被
内が負圧になると（第１図参照）、エアーブローオフタ
ンク３内の水が過圧防止管４を通じてレベルＬ１に引き
上げられ同時にエアーブローオフタンク３内の水がレベ
ルＬ２からレベルＬ３に下がる，ここではレベルＬ１か
らレベルＬ２の間の過Ｅ防止管内容積がレベルＬ２から
レベルＬ３の間のエアーブローオフタンク３の内容積と
等しいものとしブロアーの吸込み圧力がｈ３の水柱分と
同等とする。Next, the air inside the envelope is forcibly discharged by the blower 7, and when the inside of the envelope becomes negative pressure (see Figure 1), the water in the air blow-off tank 3 is raised to level L1 through the overpressure prevention pipe 4, and at the same time The water in the air blow-off tank 3 drops from level L2 to level L3, where the internal volume of the over-E prevention pipe between level L1 and level L2 is equal to the internal volume of the air blow-off tank 3 between level L2 and level L3. Assume that the suction pressure of the blower is equivalent to the water column of h3.
従って過圧防止のｈ３の長さをプロアーの吸込み能力以
上の長さにセットしておくことにより強制排気時にエア
ーブローオフタンク内の水が排出されることを防止でき
る。Therefore, by setting the length h3 for overpressure prevention to a length greater than the suction capacity of the proer, it is possible to prevent the water in the air blow-off tank from being discharged during forced exhaust.
第１図は過圧防止装置であるエアーブローオフタンクを
備えた可撓性膜製起伏堰の説明図、第２図は本発明の可
撓性膜製起伏堰を説明するための図で要部たるエアーブ
ローオフタンクとそれに挿入された過圧防止管の部分を
示す図を夫々例示している。
１・・・・・・包被、２・・・・・・送風ブロアー、２
・・・・・・排気用ブロアー、３・・・・・・エアーブ
ローオフタンク、４・・・・・・過圧防止管、５・・・
・・・注排気管、６・・・・・・排気弁、７，Ｔ・・・
・・・電気弁、８・・・・・・水。Fig. 1 is an explanatory diagram of a flexible membrane undulating weir equipped with an air blow-off tank which is an overpressure prevention device, and Fig. 2 is a diagram illustrating the main parts of the flexible membrane undulating weir of the present invention. Figures illustrating a barrel air blow-off tank and a portion of an overpressure prevention tube inserted therein are each illustrated. 1...Envelope, 2...Blower, 2
...Exhaust blower, 3...Air blow-off tank, 4...Overpressure prevention pipe, 5...
...Injection and exhaust pipe, 6...Exhaust valve, 7, T...
...Electric valve, 8...Water.
Claims (1)
付け、包被内部に空気を注入して膨張起立させ、包被内
部の空気を例えばブロアー等の強制排出手段により強制
排出することにより収縮倒伏させることを可能にした起
伏堰に於いて、包被の過圧防止装置であるエアーブロー
オフタンクに挿入する過圧防止管の最高レベルとエアプ
ローオフタンク内の水面の前記強制排出に起因する最低
レベルとの差に相当する水柱に換算される圧力を前記強
制排出手段の最犬吸込圧力より大きくすることにより包
被内の空気を強制排出する時にエアーブローオフタンク
の水が排出することを防止したことを特徴とする可撓性
膜製起伏堰。1. A flexible membrane envelope is attached to the river bed in a direction across the river, air is injected into the envelope to make it expand and stand up, and the air inside the envelope is forcibly discharged using a forced discharge means such as a blower. In the undulating weir, which allows for contraction and lodging, the highest level of the overpressure prevention pipe inserted into the air blow-off tank, which is an overpressure prevention device for the envelope, and the forcible discharge of the water surface in the air blow-off tank. The water in the air blow-off tank is discharged when the air inside the envelope is forcibly discharged by making the pressure converted into a water column corresponding to the difference from the lowest level caused by the pressure higher than the maximum suction pressure of the forcible discharge means. An undulating weir made of a flexible membrane characterized by preventing
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4112081A JPS5837448B2 (en) | 1981-03-19 | 1981-03-19 | Flexible membrane undulating weir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4112081A JPS5837448B2 (en) | 1981-03-19 | 1981-03-19 | Flexible membrane undulating weir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57155415A JPS57155415A (en) | 1982-09-25 |
| JPS5837448B2 true JPS5837448B2 (en) | 1983-08-16 |
Family
ID=12599586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4112081A Expired JPS5837448B2 (en) | 1981-03-19 | 1981-03-19 | Flexible membrane undulating weir |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837448B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001271328A (en) * | 2000-03-28 | 2001-10-05 | Bridgestone Corp | Internal pressure regulating apparatus for flexible bag body, flexible film weir using the same, and internal pressure regulating method for the same |
-
1981
- 1981-03-19 JP JP4112081A patent/JPS5837448B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57155415A (en) | 1982-09-25 |
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