JPH036705Y2 - - Google Patents
Info
- Publication number
- JPH036705Y2 JPH036705Y2 JP1983144314U JP14431483U JPH036705Y2 JP H036705 Y2 JPH036705 Y2 JP H036705Y2 JP 1983144314 U JP1983144314 U JP 1983144314U JP 14431483 U JP14431483 U JP 14431483U JP H036705 Y2 JPH036705 Y2 JP H036705Y2
- Authority
- JP
- Japan
- Prior art keywords
- mounting body
- valve body
- opening surface
- water
- sewage
- 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
- 239000010865 sewage Substances 0.000 claims description 15
- 230000002265 prevention Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000011152 fibreglass Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000003657 drainage water Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Sewage (AREA)
- Check Valves (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は河川への下水等の大型排出溝出口、又
は排水溝本管への大型支管出口等に設置する逆流
防止装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a backflow prevention device installed at the outlet of a large drainage ditch for sewage, etc. to a river, or the outlet of a large branch pipe to a main drainage ditch.
近時、下水道施設が完備されつつあるが、集中
豪雨時に於いて、河川の水位が急に増加し、下水
本管等の大型排水溝を逆流してマンホールの鉄蓋
を押し上げ、下水が路上にあふれ出して通行障害
になるのみならず、付近の民家に浸水被害を与え
る問題が生じている。係る問題を解決するには河
川への下水本管等の大型排水溝出口、又は排水溝
本管の大型支管出口等に逆流防止用の開閉自在の
蓋状の弁体を設置し、平常時には排水水圧によつ
て弁体を押し上げて排水し、増水時には増水した
水の水圧で弁体を排水溝出口に押し付けて排水溝
を閉塞し、水の逆流を阻止している。
Recently, sewage facilities have been improved, but during torrential rains, the water level of rivers suddenly increases, backing up large drains such as sewage mains and pushing up the iron covers of manholes, causing sewage to spill onto the streets. Not only is the water overflowing and blocking traffic, but it is also causing flooding damage to nearby homes. To solve this problem, install a lid-shaped valve body that can be opened and closed to prevent backflow at the outlet of a large drainage ditch such as a sewage main pipe to a river, or the outlet of a large branch pipe of a main drainage ditch. The valve body is pushed up by water pressure to drain water, and when the water rises, the water pressure of the increased water pushes the valve body against the outlet of the drain, blocking the drain and preventing water from flowing back.
しかし一般にこれら排出溝の出口は大口径であ
り、必然的にこれを塞ぐ弁体も大型となる。この
ような場合、弁体が金属などの重い材料で構成さ
れていると小排水量時には、排水水圧で弁体を押
し上げて排水することができず、排水溝内に排水
が停留してしまい円滑な排水ができない。また、
プラスチツクで弁体及び取付本体並びにヒンジ部
を構成すると、割れや破損が生じ易く耐久性がな
い。さらに、このような逆流防止装置を設置する
大型排水溝出口は常時排水、或いは風雨等に晒さ
れるため錆が発生しやすい。この錆がヒンジ部に
発生すれば弁体の円滑な開閉作動が錆による摩擦
力に妨げられて不可能になるだけでなく、通常時
の排水を阻害し、河川増水時の逆流防止作用が低
下する。このような不都合を防止するためには弁
体の保守点検を頻繁に行なわなければならないが
このような維持管理費用は下水施設の公共性から
利用者の負担となつている。
However, the outlet of these discharge grooves generally has a large diameter, and the valve body that blocks this necessarily also has a large diameter. In such cases, if the valve body is made of heavy material such as metal, the drainage water pressure will not be able to push up the valve body and drain the water when the volume of water is small, and the water will remain in the drain, resulting in a smooth flow. Can't drain water. Also,
If the valve body, mounting body, and hinge portion are made of plastic, they are likely to crack or break and lack durability. Furthermore, the outlet of a large drainage ditch where such a backflow prevention device is installed is constantly exposed to drainage, wind and rain, and is therefore susceptible to rust. If this rust occurs on the hinge, it not only becomes impossible to open and close the valve body smoothly due to the frictional force caused by the rust, but it also impedes drainage during normal times and reduces the backflow prevention effect when river water levels rise. do. In order to prevent such inconveniences, the valve body must be frequently maintained and inspected, but such maintenance costs are borne by users due to the public nature of sewage facilities.
従つて上述の問題点に鑑し、本考案の目的は、
小排出量時に於いても円滑・確実に排水を行い、
河川の増水時における大型排水溝への水の逆流を
確実に阻止するとともに、排水を永続的に円滑に
行うことによつて弁体の保守点検作業を省略し、
下水施設の利用者の負担を軽減する下水等の大型
排水溝に使用する逆流防止装置を提供することに
ある。 Therefore, in view of the above-mentioned problems, the purpose of the present invention is to:
Drains water smoothly and reliably even when the amount of water discharged is small.
This system reliably prevents water from flowing back into large drainage ditches when river water levels rise, and eliminates maintenance and inspection work on valve bodies by ensuring smooth and permanent drainage.
An object of the present invention is to provide a backflow prevention device for use in large drainage ditches for sewage, etc., which reduces the burden on users of sewage facilities.
上記目的を達成するため、本考案は後部開口面
を下水等の大型排水溝の出口開口面に取着した筒
状の取付本体と、この取付本体の前部開口面を開
閉する如くその上部を上記取付本体の上部にヒン
ジを介して枢着された弁体とを具備する下水等の
大型排水溝の逆流防止装置に於いて、上記弁体を
ガラス繊維強化プラスチツクで構成し、取付本体
及びヒンジ部分を不錆性の金属で構成し、さらに
この取付本体の前部開口面を開口面下部が開口面
上部より前方に位置する斜面としたことを特徴と
する。
In order to achieve the above object, the present invention includes a cylindrical mounting body whose rear opening is attached to the outlet opening of a large drainage ditch such as a sewage system, and a cylindrical mounting body whose rear opening is attached to the outlet opening of a large drainage ditch such as sewage. In the backflow prevention device for large drainage ditches such as sewage, which comprises a valve body pivotally connected to the upper part of the mounting body via a hinge, the valve body is constructed of glass fiber reinforced plastic, and the mounting body and the hinge The mounting body is characterized in that its parts are made of rust-proof metal, and that the front opening of the mounting body is a slope with the lower part of the opening being located forward of the upper part of the opening.
本考案は、大型排水溝を開閉する弁体にガラス
繊維強化プラスチツク（以下Ｇ−FRPとする）
を使用したため、その軽量性によつて小排水量時
に於いても排水水圧が弁体の自重に打ち勝ち、弁
体を押し上げて確実に排水することが可能にな
る。また、その高剛性によつて河川の増水時に於
いても増大した水の水圧で弁体が破壊されること
はなく、さらに取付本体前面開口面を開口面上部
より開口面下部が前方に位置するような斜面を形
成したことによつて、弁体を取付本体の前面開口
面に、弁体の自重で確実に密着させることがで
き、増大した水の水圧が弁体と取付本体との密着
をより強固に行い、以上の点から増水時の大型排
水溝内への水の逆流を確実に阻止する。また、こ
の逆流装置の取付本体及びヒンジ部分を不錆性の
金属で構成したため、取付本体の割れやヒンジ部
分の損傷等を防止でき、Ｇ−FRP製の弁体との
組合せによつて、逆流防止装置全体が耐蝕性材料
で構成されたことになり、錆の発生を防止して弁
体の永続的で円滑な開閉作動が得られる。
This invention uses glass fiber reinforced plastic (hereinafter referred to as G-FRP) for the valve body that opens and closes the large drainage ditch.
Due to its light weight, the drainage water pressure overcomes the weight of the valve body even when the displacement is small, allowing the valve body to be pushed up and water to be reliably drained. In addition, due to its high rigidity, the valve body will not be destroyed by the increased water pressure even when the river water increases, and the lower part of the opening face of the mounting body is located further forward than the upper part of the opening face. By forming such a slope, the valve body can be securely brought into close contact with the front opening surface of the mounting body due to its own weight, and the increased water pressure will cause the valve body to come into close contact with the mounting body. This will be strengthened to ensure that water does not flow back into the large drainage ditch during high water levels. In addition, since the mounting body and hinge part of this backflow device are made of rust-free metal, cracking of the mounting body and damage to the hinge part can be prevented, and in combination with the G-FRP valve body, backflow The entire prevention device is made of a corrosion-resistant material, which prevents the occurrence of rust and provides permanent and smooth opening/closing operation of the valve body.
第１図乃至第３図に本考案の実施例を示す。 Embodiments of the present invention are shown in FIGS. 1 to 3.
１は筒状の取付本体であり、後部に取付フラン
ジ１ａをもち、前部にフランジ状弁座部１ｂを一
体に有し、これらはステンレス鋼等の不錆金属材
料を用いて構成される。 Reference numeral 1 denotes a cylindrical mounting body, which has a mounting flange 1a at the rear and integrally has a flange-shaped valve seat portion 1b at the front, and is constructed using a rust-free metal material such as stainless steel.
２はＧ−FRPで構成された弁体であつて、上
記取付本体１の前面開口部イを閉鎖し得る面積を
もつ平板円板形状としている。この時、取付本体
１もＧ−FRPで形成することも可能であるが、
この場合排水水流によつて筒状のＧ−FRP取付
本体が破損する恐れがあるため、本考案では不錆
性金属で取付本体１を形成する。 Reference numeral 2 denotes a valve body made of G-FRP, which is shaped like a flat disk and has an area capable of closing the front opening A of the mounting body 1. At this time, the mounting body 1 can also be made of G-FRP, but
In this case, the cylindrical G-FRP mounting body may be damaged by the drainage water flow, so in the present invention, the mounting body 1 is formed of a rust-resistant metal.
上記弁体２の背面には断面Ｌ形をなす２本の縦
方向の補強材３，３が数個所でボルト結合され、
この補強材３，３の上端は適宜横材４で連結され
ていると共に、さらに後方に延長された支持杆部
５，５をもち、この支持杆部５，５の後端は、前
記取付本体１の上部に立設したヒンジ６，６にヒ
ンジピン７を介して枢着されている。 Two longitudinal reinforcing members 3, 3 having an L-shaped cross section are bolted to the back surface of the valve body 2 at several locations.
The upper ends of the reinforcing members 3, 3 are connected by a cross member 4 as appropriate, and have supporting rod portions 5, 5 extending further rearward, and the rear ends of the supporting rod portions 5, 5 are connected to the mounting body. It is pivotally connected via a hinge pin 7 to hinges 6 , 6 erected on the upper part of the housing 1 .
上記補強材３，３、横材４、支持杆部５，５、
ヒンジ６，６及びヒンジピン７は、上述したステ
ンレス鋼等の不錆金属材料を用いて構成されてい
る。 The reinforcement members 3, 3, the horizontal members 4, the support rods 5, 5,
The hinges 6, 6 and the hinge pin 7 are constructed using a rust-free metal material such as the above-mentioned stainless steel.
取付本体１のフランジ状弁座部１ｂの周囲には
ネオプレンゴム等の環状パツキング８が接着固定
してあり、弁体２が取付本体１の弁座部１ｂに当
接した際の密閉性を向上させている。 An annular packing 8 made of neoprene rubber or the like is adhesively fixed around the flange-shaped valve seat portion 1b of the mounting body 1 to improve sealing performance when the valve body 2 comes into contact with the valve seat portion 1b of the mounting body 1. I'm letting you do it.
取付本体１は、増水時に於いて増水した水の水
圧によつて弁体２が取付本体１により強固に密着
するように、前部開口面を上部より下部が前方へ
出ているように角度αだけ傾斜させてある。 The mounting body 1 has a front opening at an angle α such that the lower part protrudes more forward than the upper part so that the valve body 2 will come into tighter contact with the mounting body 1 due to the increased water pressure when the water increases. It is tilted only.
取付本体１の後部の取付フランジ１ａの後面周
囲にはネオプレンゴム等の環状パツキング９が接
着固定してあり、また上記フランジ１ａの周囲複
数個所に取付ボルト孔１０が設けてあり、大型排
出溝出口又は排水溝本管への大型支管出口にアン
カーボルト（図示せず）を介して取付けるように
なしてある。このアンカーボルトもステンレス鋼
等の不錆金属材料で構成される。 An annular packing 9 made of neoprene rubber or the like is adhesively fixed around the rear surface of the mounting flange 1a at the rear of the mounting body 1, and mounting bolt holes 10 are provided at multiple locations around the flange 1a, and a large drain groove exit is provided. Alternatively, it can be attached to a large branch pipe outlet to the drain main pipe via an anchor bolt (not shown). This anchor bolt is also made of rust-free metal material such as stainless steel.
上記構造によつて、取付施工工事はマンホール
内又は河川出口等で水量の少ない時間帯（夜間
等）に短時間に実施することができる。また小排
水量時には、弁体２を軽量なＧ−FRPで構成し
てあるから、円滑、確実に開作動させることがで
き、逆流は確実に防止させることができる。そし
て装置の殆どすべてを耐蝕材料としているので永
続的な使用が可能である。 With the above structure, installation work can be carried out in a short time in a manhole or at a river outlet, etc., during times when the amount of water is low (such as at night). Furthermore, when the displacement is small, since the valve body 2 is made of lightweight G-FRP, it can be opened smoothly and reliably, and backflow can be reliably prevented. And since almost all of the device is made of corrosion-resistant materials, it can be used permanently.
本考案は上述の構造になつており、この結果小
排水量時に於いても排水水圧が軽量なＧ−FRP
で構成された弁体を押し上げて円滑・確実に排水
を行うことが可能になる。またＧ−FRPは高剛
性を保持することから、河川の増水時に於いても
増水した水の水圧によつて弁体が破壊されること
はなく、さらに取付本体前部開口面に形成された
斜面によつて、増水した水の水圧が弁体と取付本
体との密着をより強固に行い、従つて、大型排水
溝内への水の逆流を確実に阻止する。またこの逆
流防止装置全体が耐蝕性を保持していることから
錆の発生を防止し、弁体は永続的に円滑な開閉作
動を得ることができる。この結果この逆流防止装
置の保守点検作業が大幅に省略でき、下水道設備
の維持管理費用を低減して利用者の負担を軽減す
ることが可能になる。
The present invention has the above-mentioned structure, and as a result, G-FRP has a lightweight drainage water pressure even when the displacement is small.
By pushing up the valve body, it is possible to drain water smoothly and reliably. In addition, since G-FRP maintains high rigidity, the valve body will not be destroyed by the water pressure of the increased water even when the river water rises, and the slope formed on the front opening of the mounting body will not damage the valve body. As a result, the water pressure of the increased water brings the valve body into closer contact with the mounting body, thereby reliably preventing water from flowing back into the large drainage ditch. Furthermore, since this backflow prevention device as a whole maintains corrosion resistance, rust is prevented from forming, and the valve body can permanently and smoothly open and close. As a result, the maintenance and inspection work for this backflow prevention device can be significantly omitted, making it possible to reduce maintenance costs for sewerage equipment and reduce the burden on users.
第１図は本考案装置に係る下水等の大型排水溝
の逆流防止装置の側面部分断面図、第２図は取付
本体の正面図、第３図は弁体の背面図である。
１……取付本体、１ａ……取付フランジ部、１
ｂ……フランジ状弁座部、２……弁体、６……ヒ
ンジ。
FIG. 1 is a side partial cross-sectional view of a backflow prevention device for large drains such as sewage according to the present invention, FIG. 2 is a front view of the mounting body, and FIG. 3 is a rear view of the valve body. 1...Mounting body, 1a...Mounting flange part, 1
b...Flanged valve seat, 2...Valve body, 6...Hinge.
Claims (1)
に取着した筒状の取付本体と、この取付本体の前
部開口面を開閉する如くその上部を上記取付本体
の上部にヒンジを介して枢着された弁体とを具備
する下水等の大型排水溝の逆流防止装置に於い
て、 上記弁体をガラス繊維強化プラスチツクで構成
し、取付本体及びヒンジ部分を不錆性の金属で構
成し、さらにこの取付本体の前部開口面を開口面
下部が開口面上部より前方に位置する斜面とした
ことを特徴とする下水等の大型排水溝の逆流防止
装置。[Scope of Claim for Utility Model Registration] A cylindrical mounting body whose rear opening surface is attached to the outlet opening surface of a large drainage ditch such as sewage, and a cylindrical mounting body whose front opening surface is attached as described above so as to open and close the front opening surface of this mounting body. In a backflow prevention device for large drainage ditches such as sewage, which is equipped with a valve body pivotally attached to the upper part of the main body via a hinge, the valve body is made of glass fiber reinforced plastic, and the mounting body and the hinge part are made of glass fiber reinforced plastic. A backflow prevention device for a large drainage ditch such as sewage, which is constructed of rust-proof metal and further characterized in that the front opening surface of the mounting body is a slope such that the lower part of the opening surface is located forward of the upper part of the opening surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14431483U JPS6053887U (en) | 1983-09-17 | 1983-09-17 | Backflow prevention device for large drainage ditches such as sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14431483U JPS6053887U (en) | 1983-09-17 | 1983-09-17 | Backflow prevention device for large drainage ditches such as sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6053887U JPS6053887U (en) | 1985-04-16 |
| JPH036705Y2 true JPH036705Y2 (en) | 1991-02-20 |
Family
ID=30321854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14431483U Granted JPS6053887U (en) | 1983-09-17 | 1983-09-17 | Backflow prevention device for large drainage ditches such as sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6053887U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4584132B2 (en) * | 2004-12-01 | 2010-11-17 | 東京都下水道サービス株式会社 | Check valves and drainage facilities |
| JP5084877B2 (en) * | 2004-12-01 | 2012-11-28 | 東京都下水道サービス株式会社 | Check valves and drainage facilities |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57107494A (en) * | 1980-12-25 | 1982-07-03 | Tamotsu Miura | Cap of drain pipe |
-
1983
- 1983-09-17 JP JP14431483U patent/JPS6053887U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57107494A (en) * | 1980-12-25 | 1982-07-03 | Tamotsu Miura | Cap of drain pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6053887U (en) | 1985-04-16 |
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