JPS59233029A - Preventor for inflow of rain water into underground structure cover - Google Patents

Preventor for inflow of rain water into underground structure cover

Info

Publication number
JPS59233029A
JPS59233029A JP58104784A JP10478483A JPS59233029A JP S59233029 A JPS59233029 A JP S59233029A JP 58104784 A JP58104784 A JP 58104784A JP 10478483 A JP10478483 A JP 10478483A JP S59233029 A JPS59233029 A JP S59233029A
Authority
JP
Japan
Prior art keywords
valve
water
opening
hole
case
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.)
Granted
Application number
JP58104784A
Other languages
Japanese (ja)
Other versions
JPS627334B2 (en
Inventor
Tomohiro Ihara
伊原 友浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NISSHO KOSAN KK
Original Assignee
NISSHO KOSAN KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NISSHO KOSAN KK filed Critical NISSHO KOSAN KK
Priority to JP58104784A priority Critical patent/JPS59233029A/en
Publication of JPS59233029A publication Critical patent/JPS59233029A/en
Publication of JPS627334B2 publication Critical patent/JPS627334B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

PURPOSE:To prevent the inflow of water into an underground structure by a method in which a through hole is provided in a cover, a rain water inflow preventive valve is provided to the back of the cover, and the valve is designed to be automatically closed with the increase of the weight of a water absorber. CONSTITUTION:When rain water comes in through the hole 4 of a cover 1, the weight of a water absorber 22 is increased due to water absorption. As the weight of the water absorber 22 increases, a valve body 16 goes down against the action of a compressed coil spring and reaches an inclined wall 12 to interrupt the connection fo the through hole 4 with the inside of a manhole, thereby preventing the inflow of rain water. When the water absorber 22 is dried, the coil spring 21 is restored to its orignal state because the mass of the absorber 22 is reduced, an the ventilation of air is allowed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、マンホール等を閉塞する地下構造物用蓋の雨
水流入防止装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rainwater inflow prevention device for a cover for an underground structure that closes a manhole or the like.

〔従来技術、及びその問題点〕[Prior art and its problems]

先に、本発明者は、特公昭58〜15569号公報るこ
記載のマンホール蓋等における雨水流入防止装置を提供
した。これは第1図に示すように、縦穴内での異常昇圧
を防止するために、蓋体(100)に連通孔(101’
Iを貫設し、降雨時等に雨水がこの連通孔(101)か
ら縦穴内に流下することを防ぐことができるようにフロ
ート弁(102)を配置したものである。
Previously, the present inventor provided a rainwater inflow prevention device for a manhole cover, etc., as described in Japanese Patent Publication No. 58-15569. As shown in Fig. 1, this is done through a communication hole (101') in the lid body (100) in order to prevent abnormal pressure rise inside the vertical hole.
A float valve (102) is installed so as to prevent rainwater from flowing down into the vertical hole from the communicating hole (101) during rain or the like.

フロート弁(102)は蓋体(100)裏面に連結され
た取付受板(103)に支持されたフロート室(104
)内に収容され、取付受板(103)には土砂排出用窓
(105)を開設している。フロート弁(102)の下
端には傾斜面(106)を有するボール弁収容室(10
7)を凹設しており、同室内にボール弁(108)を装
着している。またボール弁(108)装着位置に対応す
る取付受板(103)には排水孔(109)が開設され
ている。
The float valve (102) has a float chamber (104) supported by a mounting plate (103) connected to the back surface of the lid (100).
), and the mounting receiving plate (103) has a window (105) for discharging earth and sand. The lower end of the float valve (102) has a ball valve housing chamber (10) having an inclined surface (106).
7) is recessed, and a ball valve (108) is installed in the same chamber. Further, a drainage hole (109) is provided in the mounting plate (103) corresponding to the mounting position of the ball valve (108).

上記構成において、通常時はフロート弁(102)はそ
の自重により下降して連通孔(101)により蓋外と蓋
体(100)内を通気可能状態に維持し、かつ、縦穴内
から有害ガスを放出し、さらには、異常昇圧を防止する
ようにしている。
In the above configuration, under normal conditions, the float valve (102) descends due to its own weight and maintains the outside of the lid and the inside of the lid (100) in a ventilated state through the communication hole (101), and also removes harmful gas from inside the vertical hole. Furthermore, it is designed to prevent abnormal pressure rise.

一方、降雨時には雨水が連通孔(101)からフロート
室(104)内に流入し、この流入水は排水孔(109
)から排出される。しかし流入量が排水孔(109)か
らの流出量より大となると、フロート弁(102)が上
昇し、ボール弁(1,08)はポール弁収容室(1,0
7)内の傾斜面(106)による係止力を解除され、同
ボール弁(108)が排水孔(109)方向へ移動して
同排水孔(109)を閉塞する。この状態でフロート弁
(102)は急速上昇し、フロート弁(102)の傾#
+[壁(102a)が連通孔(101)に連絡する開口
(1,01a)を閉塞して雨水の流入を防ぐことができ
るようになっている。
On the other hand, during rainfall, rainwater flows into the float chamber (104) from the communication hole (101), and this inflow water flows through the drain hole (109).
) is discharged from. However, when the inflow becomes larger than the outflow from the drain hole (109), the float valve (102) rises and the ball valve (1,08) moves into the pole valve storage chamber (1,0
The locking force by the inclined surface (106) in 7) is released, and the ball valve (108) moves toward the drain hole (109) and closes the drain hole (109). In this state, the float valve (102) rises rapidly, and the float valve (102) tilts #
+ [The wall (102a) can close the opening (1, 01a) communicating with the communication hole (101) to prevent rainwater from entering.

しかし、フロート弁(102)の体積は一定であるから
フロート室(104)内の溜水により作用する浮力には
」−限がある。洪水時等には水面レベルが蓋体(100
)より上方に位置するので水位が高くなるにつれて、フ
ロート弁(102)は増水による水圧に基いて下向きの
力を受ける。そして、この下向きの作用力がフロート弁
(102)の受ける浮力より大きくなった場合には、フ
ロート弁(102)は下降して開口(101a)を閉塞
できなくなる。従って、フロート弁(102)の開弁に
よって縦穴内に水が流入し、処理場に過大流量となって
流下し、地下構造物を破損させる恐れがある。
However, since the volume of the float valve (102) is constant, there is a limit to the buoyant force exerted by the accumulated water in the float chamber (104). During floods, the water level may be lower than the lid (100
), as the water level rises, the float valve (102) receives a downward force based on the water pressure caused by the increase in water. When this downward acting force becomes greater than the buoyant force received by the float valve (102), the float valve (102) is unable to descend and close the opening (101a). Therefore, when the float valve (102) is opened, water flows into the vertical hole and flows down into the treatment plant at an excessive flow rate, potentially damaging the underground structure.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、以上のような欠点を解消しようとする
もので、異常降雨時のような多量の雨水の流入を確実に
防止できる装置を提供することにある。
An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a device that can reliably prevent large amounts of rainwater from flowing in during abnormal rainfall.

〔実施例〕〔Example〕

以下、図面に示す実施例に基いて本発明を説明する。 The present invention will be described below based on embodiments shown in the drawings.

第2図と第3図は地下構造物用蓋として汎用されている
マンホール蓋の表面平面図と裏面平面図である。図中、
(1)は直径方向に対向して蝶番装着部(2)及びバー
ル穴(3)を各々形成した蓋体であり、同心円上の4位
置にマンホール縦穴内と外部を連通させる通孔(4)を
貫設している。
FIGS. 2 and 3 are a top and bottom plan view of a manhole cover that is commonly used as a cover for underground structures. In the figure,
(1) is a lid body in which a hinge attachment part (2) and a crowbar hole (3) are formed facing each other in the diametrical direction, and there are through holes (4) at four positions on a concentric circle that communicate the inside of the manhole vertical hole with the outside. is installed throughout.

第4図は第2図のl−■線矢視による拡大断面図で、蓋
体(1)裏面に垂下された補強リブ(5)に連続する筒
状壁(6)が形成され、内部を略円筒状の弁室(7)と
している。同弁室(7)は下端が開口しており、筒状壁
(6)には通気口(8)、及び後述する弁ケース装着用
の装着口(9)を各々開設している。
Fig. 4 is an enlarged sectional view taken along the line l-■ in Fig. 2, in which a cylindrical wall (6) is formed that is continuous with the reinforcing rib (5) hanging down on the back surface of the lid (1), and the inside is The valve chamber (7) has a substantially cylindrical shape. The valve chamber (7) is open at the lower end, and the cylindrical wall (6) is provided with a ventilation port (8) and a mounting port (9) for mounting the valve case, which will be described later.

通孔(4)は同心円−にに形成される3個の実弾状に分
割されており、中央部(4a)と接続部(4b)とを有
している。
The through hole (4) is divided into three concentric bullet-shaped sections, each having a central portion (4a) and a connecting portion (4b).

第5図は弁室(7)内に弁ケース00)を装着した状態
を示す断面図、第6図は弁ケース(10)の平面図であ
る。弁ケース(10)は合成樹脂などにより形成された
下端開口の中空筒状であり、下端にビス孔(lla)を
穿設したフランジ(11)を形成している。上端から下
方に向けて縮径するすり林状の傾斜壁(]2)が下端に
開口(13)を有して形成され、開口(13)より下位
にはU字状の弁軸案内杆(14)を連設している。この
弁軸案内杆(14)には開口(13)と同心上に弁軸摺
動案内筒(15)が垂設されており、上部側にシリコー
ンゴムなどの弾性体よりなる弁体(16)を取付けた弁
軸(17)を昇降可能に支持している。(18)は弁体
(16)を支持するとともに弁軸(17)を環状間隙(
19)を画成して外挿するスプリングケースで、第8図
で示すように弁軸案内杆(14)を嵌挿可能な幅を有す
る切欠(20)を直径方向に対向する2位置に形成して
いる。さらに、(21)はスプリングケース(18)内
に内包され、弁体(16)と弁軸案内杆(14)間に介
設される圧縮コイルスプリングである。
FIG. 5 is a cross-sectional view showing the valve case 00) installed in the valve chamber (7), and FIG. 6 is a plan view of the valve case (10). The valve case (10) is made of synthetic resin or the like and has a hollow cylindrical shape with an opening at the lower end, and has a flange (11) formed with a screw hole (lla) at the lower end. A forest-like inclined wall (2) whose diameter decreases downward from the upper end is formed with an opening (13) at the lower end, and below the opening (13) there is a U-shaped valve shaft guide rod (2). 14) are installed in succession. This valve shaft guide rod (14) has a valve shaft sliding guide cylinder (15) vertically installed concentrically with the opening (13), and a valve body (16) made of an elastic material such as silicone rubber on the upper side. The valve shaft (17) with the attached valve is supported so as to be movable up and down. (18) supports the valve body (16) and connects the valve stem (17) to the annular gap (
As shown in FIG. 8, notches (20) having a width that allows insertion of the valve shaft guide rod (14) are formed at two positions facing each other in the diametrical direction. are doing. Further, (21) is a compression coil spring contained within the spring case (18) and interposed between the valve body (16) and the valve shaft guide rod (14).

弁軸(17)の上端には、周面が略球状の弁頭(17a
)が形成され、開弁!fJ1(17a)下面とスプリン
グケース(18)の上端に形成されたフランジ部(18
a)間に弁体(16)を挟持している。尚、本実施例で
は弁体(16)の上下両面に肉薄のフィルム(16a)
を取付けている。
At the upper end of the valve stem (17), there is a valve head (17a) having a substantially spherical circumferential surface.
) is formed and the valve opens! The flange portion (18) formed on the lower surface of fJ1 (17a) and the upper end of the spring case (18)
a) A valve body (16) is held between them. In this embodiment, a thin film (16a) is provided on both the upper and lower surfaces of the valve body (16).
is installed.

弁体(16)の外径はフランジ(18a)径より大きく
、かつ弁ケース(10)の開口(13)径より大である
。従って、弁軸(17)が下降すると、弁体(16)の
外周端が傾斜壁(12)に接離することができ、開口(
13)の開閉を行なうことができる。
The outer diameter of the valve body (16) is larger than the diameter of the flange (18a) and larger than the diameter of the opening (13) of the valve case (10). Therefore, when the valve shaft (17) descends, the outer peripheral end of the valve body (16) can come into contact with and separate from the inclined wall (12), and the opening (
13) can be opened and closed.

(22)は水を含浸可能な吸水体で、本例ではボリビニ
ルアルコール樹脂を素材として環状に形成されて二段積
みされており、弁軸(17)に一体連結された支持1f
fl(23)により保持されている。支持板(23)は
第9図および第10図に示すように環状に形成され、中
央の開口(24)には弁軸(17)の挿通孔(25)を
有し、同挿通孔(25)から半径方向に連結杆(26)
が伸長している。また吸水体(22)の載置面(27)
には複数の開口(28)が開設され、端面には吸水体(
22)外周を支持する支持棒(29)を立設している。
(22) is a water-absorbing body that can be impregnated with water, and in this example, it is made of polyvinyl alcohol resin and is formed into an annular shape and stacked in two stages, and the support 1f is integrally connected to the valve shaft (17).
It is held by fl(23). The support plate (23) is formed in an annular shape as shown in FIGS. 9 and 10, and has an insertion hole (25) for the valve stem (17) in the central opening (24). ) to the connecting rod (26) in the radial direction
is growing. Also, the mounting surface (27) of the water absorbent body (22)
A plurality of openings (28) are opened in the , and a water absorbent body (
22) A support rod (29) is provided to support the outer periphery.

さらに、(30)は弁ケース(1o)下端開口に取付け
られるカバーで、中央に開口(31)を有する環状体で
ある。このカバー(30)は第7図に示すように、弁ケ
ース(10)のフランジ(11)にビス(32)を介し
て連設されるが、同時にビス(32)は弁ケースaω自
体を取付金具(33)により弁室(7)に装着すること
ができる。即ち、筒状壁(6)の3位置には前述のよう
に弁ケース00)装着用の装着口(9)が開設されてい
て、第5図及び第7図で明らかなように装着口(9)の
下端壁(9a)に係合するような取付金具(33)を用
いることにより、ビス(32)を介して弁ケース00)
、カバー(30)を弁室(7)内に装着することができ
るのである。
Further, (30) is a cover attached to the lower end opening of the valve case (1o), which is an annular body having an opening (31) in the center. As shown in Fig. 7, this cover (30) is connected to the flange (11) of the valve case (10) via screws (32), but at the same time, the screws (32) attach the valve case aω itself. It can be attached to the valve chamber (7) using a metal fitting (33). That is, as mentioned above, mounting ports (9) for mounting the valve case 00) are provided at three positions of the cylindrical wall (6), and as is clear from FIGS. 9) By using a mounting bracket (33) that engages with the lower end wall (9a), the valve case 00) can be attached via the screw (32).
, the cover (30) can be installed inside the valve chamber (7).

以上のような弁室(7)、及び同弁室(7)内に配置さ
れる弁ケースQO)等の構成部材により雨水流入防止弁
(A)が蓋体(1)の裏面に形成され、通常時は第5図
に示すような状態に弁体(16)が弁ケース00)の傾
斜壁(12)から解離し、弁頭(17a)が蓋体(1)
の通孔(4)の中央部(4a)裏面に当接している。
A rainwater inflow prevention valve (A) is formed on the back surface of the lid body (1) by the above-mentioned components such as the valve chamber (7) and the valve case QO) arranged in the valve chamber (7), Normally, the valve body (16) is separated from the inclined wall (12) of the valve case 00) in the state shown in Fig. 5, and the valve head (17a) is separated from the lid body (1).
The central part (4a) of the through hole (4) is in contact with the back surface.

圧縮コイルスプリング(21)は弁ケース00)と弁体
く1G)間に介設され、同弁体(16) 、スプリング
ケース(18) 、吸水体(22> 、支持板(23)
等の可動部材を昇降させるためのもので、吸水体(22
)が水を含浸していない状態では、これら可動部材を第
5図の状態に位置させることができるようなバネ定数と
する。同第5図において、通孔(4)、弁ケース00)
の開口(13) 、及びカバー(30)の開口(31)
によって外界とマンホール内とは連通しており、同マン
ホール内から有害ガス等を放出することができるととも
に、マンホール内水位上昇による空気等の流体の異常昇
圧を防止することかできる。
A compression coil spring (21) is interposed between the valve case 00) and the valve body 1G), and is connected to the valve body (16), the spring case (18), the water absorbing body (22>), and the support plate (23).
It is used to raise and lower movable members such as water absorbers (22
) is not impregnated with water, the spring constant is such that these movable members can be positioned in the state shown in FIG. In Figure 5, through hole (4), valve case 00)
opening (13), and opening (31) in the cover (30).
This allows communication between the outside world and the interior of the manhole, allowing harmful gases, etc. to be released from the interior of the manhole, and also preventing abnormal pressure increases in fluids such as air due to a rise in the water level inside the manhole.

次に、降雨時には通孔(4)から雨水が流入し、これに
より吸水体(22)が水を含浸してその重量が通常時よ
り増加する。ここで、前記の圧縮コイルスプリング(2
1)の条件に加え、水含浸による吸水体(22)の重量
がある臨界点を越えた時には収縮するようなバネ定数と
すれば、重量の増加によって弁体(16)等の可動部材
が下降する。この時、スプリングケース(18)には切
欠(20)を弁体(16)が傾斜壁(12)に着座可能
となるような長さに形成しているので、この切欠(2o
)が弁軸案内杆(14)を外挿して移動でき、昇降に支
障はない。
Next, when it rains, rainwater flows in through the through hole (4), which impregnates the water absorbent body (22) with water and increases its weight compared to normal times. Here, the compression coil spring (2
In addition to the condition 1), if the spring constant is set such that it contracts when the weight of the water absorbent body (22) impregnated with water exceeds a certain critical point, movable members such as the valve body (16) will descend due to the increase in weight. do. At this time, since a notch (20) is formed in the spring case (18) with a length that allows the valve body (16) to sit on the inclined wall (12), this notch (20) is formed in the spring case (18).
) can be moved by extrapolating the valve shaft guide rod (14), and there is no problem in going up and down.

上記によって、第5図の一点鎖線で示すように弁体(1
6)が傾斜壁(12)に着座し、通孔(4)とマンホー
ル内を非連通とし、雨水の流入を防ぐことができる。蓋
体(11上面に水が溜水して弁体(16)方向に水圧が
負荷されたとしても、この水圧は閉弁方向に作用するの
で開弁することはなく、雨水の流入を完全に防止できる
As a result of the above, the valve body (1
6) is seated on the inclined wall (12), and the through hole (4) and the inside of the manhole are not communicated with each other, thereby preventing rainwater from flowing in. Even if water accumulates on the top surface of the lid body (11) and water pressure is applied toward the valve body (16), this water pressure will act in the valve closing direction, so the valve will not open, completely blocking the inflow of rainwater. It can be prevented.

次に、吸水体(22)が乾燥して水分が排除された時に
は、その質量が軽くなるため、圧縮コイルスプリング(
21)が復元して、元の状態に戻り、通気を行なうこと
ができる。
Next, when the water absorbent body (22) dries and moisture is removed, its mass becomes lighter, so the compression coil spring (
21) is restored and returns to its original state, allowing ventilation.

〔効果〕〔effect〕

発明の効果を列挙すると下記の通りである。 The effects of the invention are listed below.

(1)雨水の流入時には吸水体の重量増加によって自動
的に閉弁することができ、地下構造物内に多量の水の流
入を防ぐことができるので、同地下構造物及び処理施設
の保全を図ることができる。
(1) When rainwater flows in, the valve can be automatically closed due to the increased weight of the water absorber, preventing large amounts of water from flowing into the underground structure, thereby reducing the maintenance of the underground structure and treatment facility. can be achieved.

(2)蓋体上面に溜水して水圧が負荷されてもこの水圧
は閉弁方向に作用するので開弁することはなく、確実に
雨水流入を防止できる。
(2) Even if water accumulates on the top surface of the lid and water pressure is applied, this water pressure acts in the direction of closing the valve, so the valve will not open, and rainwater can be reliably prevented from flowing in.

(3)吸水体による重量の増減に基いて弁体が昇降する
ので外気と地下構造物内との連通、非連通を自動的に行
なうことができる。
(3) Since the valve body moves up and down based on the weight increase/decrease due to the water absorbing body, communication between the outside air and the inside of the underground structure can be automatically established and disconnected.

(4)降雨中断後は、吸水体の乾燥により弁体が自動的
に元の位置に復元して、外界と地下構造物とが通気可能
となり、さらに地下構造物内の空気0 等圧縮された流体を外界に排出することができる。
(4) After the rain stops, the valve body automatically returns to its original position as the water absorber dries, allowing ventilation between the outside world and the underground structure, and further compressing the air inside the underground structure to zero. Fluid can be discharged to the outside world.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の雨水流入防止装置の要部断面図、第2図
はマンホール蓋の表面平面図、第3図は同裏面平面図、
第4図は第2図のI−I線矢視による断面図、第5図は
雨水流入防止弁を示す断面図、第6図は弁ケースの平面
図、第7図は弁ケースと弁室との接続構造を示す正面図
、第8図はスプリングケースの正面図、第9図はカバー
の平面図、第10図は同断面図である。 ill  蓋体 (4)通孔 00  弁ケース (13)開口 (16)弁体 (17)弁軸 (21)圧縮コイルスプリング (22)吸水体 (A)雨水流入防止弁 1 第 1 図 第2図 @ 3  図 −1f19  図 23 手続ネl↑正書 1、事件の表示 ■事旧58年 特許願 第104784号2、発明の名
称 地下構造物用蓋の雨水流入防止装置 3、補正をする者 事件との関係  特許出願人 4、代理人 明    零■    書 1、発明の名称 地下構造物用蓋の雨水流入防止装置 2、特許請求の範囲 1、蓋体に通孔を貫設し、目蓋体裏面に雨水流入防止弁
を設け、上記雨水流入防止弁は、蓋体裏面に取付けられ
通孔と蓋体内部を連通ずる開口を有した弁ケースと、開
弁ケースに昇降可能に支持され」1記開口の上位側に位
置して同開口周縁部に接離する弁体を備えた弁軸と、同
弁体及び弁軸を開弁方向に付勢する圧縮コイルスプリン
グと、開口の下位側に位置して弁軸に一体連結した吸水
体とを有していることを特徴とする地下構造物用蓋の雨
水流入防止装置。 3、発明の詳細な説明 〔産業上の利用分野〕 本発明は、マンホール等を閉塞する地下構造物用蓋の雨
水流入防止装置に関する。 〔従来技術、及びその問題点〕 先に、本発明者は、特公昭58’−15569号公報に
記載のマンホール蓋等における雨水流入防止装置を提供
した。これは第1図に示すように、縦穴内での異常昇圧
を防止するために、蓋体(100)に連通孔(101)
を貫設し、降雨時等に雨水がこの連通孔(101)から
縦穴内に流下することを防ぐことができるようにフロー
ト弁(102)を配置したものである。 フローl−弁(102)は蓋体(100)裏面に連結さ
れた取付受板(103)に支持されたフロート室(10
4)内に収容され、取付受板(103)には土砂排出用
窓(105)を開設している。フロート弁(102)の
下端には傾斜面(106)を有するボール弁収容室(1
07)を凹設しており、同室内にボール弁(108)を
装着している。またボール弁(108)装着位置に対応
する取付受板(103)には孔(104a)に対向して
排水孔(109)が開設されている。 上記構成において、通常時はフロート弁(102)はそ
の自重により下降して連通孔(101)により蓋外と蓋
体(100)内を通気可能状態に維持し、かつ、縦穴内
から有害ガスを放出し、さらには、異常揚圧を防止する
ようにしている。 一方、降雨時には雨水が連通孔(101,)からフロー
ト室(104)内に流入し、この流入水は孔(104a
)を通って排水孔(109)から排出される。 しかし流入量が孔(1,04a)からの流出量より大と
なると、フロート弁(102)が上昇し、ボール弁(1
0B)はボール弁収容室(107)内の傾斜面(106
)による係止力を解除され、同ボール弁(10B)が排
水孔(109)方向へ移動して開孔(104a)を閉塞
する。この状態でフロート弁(102)は急速上昇し、
フロート弁(102)の傾斜壁(102a)が連通孔(
101)に連絡する開口(101a)を閉塞して雨水の
流入を防ぐことができるようになっている。 しかし、フロー1〜弁(102)の体積は一定であるか
らフロート室(104)内の溜水により作用する浮力に
は」1限がある。洪水時等には水面レベルが蓋体(10
0)より上方に位置するので水位が高くなるにつれて、
フロート弁(102)は増水によろ水圧に基いて下向き
の力を受ける。そして、この下向きの作用力がフロート
弁(1G2)の受ける浮力より大きくなった場合には、
フロート弁(102)は下降して開口(101a)を閉
塞できなくなるという問題がある。 〔発明の目的〕 本発明の目的は、以」−のような問題を解消しようとす
るもので、異常降雨時のような多量の雨水の流入を確実
に防止できる装置を提供することにある。 〔実施例〕 以下、図面に示す実施例に基いて本発明を説明する。 第2図と第3図は地下構造物用蓋として汎用されている
マンボール蓋の表面平面図と裏面平面図である。図中、
(1)は直径方向に対向して蝶番装着部(2)及びバー
ル穴(3)を各々形成した蓋体であり、同心円上の4位
置にマンホール縦穴内と外部を連通させる通孔(4)を
貫設している。 第4図は第2図のI−I線矢視による拡大断面図で、蓋
体(1)裏面に垂下された補強リブ(5)に連続する筒
状壁(6)が形成され、内部を略円筒状の弁室(7)と
している。同弁室(7)は下端が開口しており、筒状壁
(6)には通気口(8)、及び後述する弁ケース装着用
の装着口(9)を各々開設している。 通孔(4)は同心円上に形成される3個の実弾状に分割
されており、中央部(4a)と接続部(4b)とを有し
ている。 第5図は弁室(7)内に弁ケース(10)を装着した状
態を示す断面図、第6図は弁ケースQlllの平面図で
ある。弁ケース00)は合成樹脂などにより形成された
下端開口の中空筒状であり、下端にビス孔(118)を
穿設したフランジ(11)を形成している。上端から下
方に向けて縮径するすり林状の傾斜壁(12)が下端に
開口(13)を有して形成され、開口(13)より下位
には口字状の弁軸案内杆(14)を連設している。この
弁軸案内杆(14)には開口(13)と同心上に弁軸摺
動案内筒(15)が垂設されており、上部側にシリコー
ンゴムなどの弾性体よりなる弁体(16)を取付けた弁
軸(17)を昇降可能に支持している。(18)は弁体
(16)を支持するとともに弁軸(]7)を環状間隙(
19)を画成して外挿するスプリングケースで、第8図
で示すように弁軸案内杆(14)を嵌挿可能な幅を有す
る切欠(20)を直径方向に対向する2位置に形成して
いる。さらに、(21)はスプリングケース(18)内
に内包され、弁体(16)と弁軸案内杆(14)間に介
設される圧縮コイルスプリングである。 弁軸(17)の上端には、周面が略球状の弁頭(17a
)が形成され、同弁頭(17a)下面とスプリングケー
ス(18)の上端に形成されたフランジ部(18a)間
に弁体(16)を挾持している。尚、本実施例では弁体
(16)の上下両面にゴム等を素材とする弁体(16)
に外傷を与えることを防ぐために肉薄のフィルム(16
a)を取付けている。 弁体く16)の外径はフランジ(18a)径より大きく
、かつ弁ケース(10の開口(13)径より大である。 従って、弁軸(17)が下降すると、弁体(16)の外
周端が傾斜壁(12)に接離することができ、開口(1
3)の開閉を行なうことができる。 (22)は水を含浸可能な吸水体で、本例ではポリビニ
ルアルコール樹脂を素材として環状に形成されて二段積
みされており、弁軸(17)に一体連結された支持板(
23)により保持されている。支持板(23)は第9図
および第10図に示すように環状に形成され、中央の開
口(24)には弁軸(17)の挿通孔(25)を有し、
同挿通孔(25)から半径方向に連結杆(26)が伸長
している。また吸水体(22)の載置面(27)には複
数の開口(28)が開設され、端面には吸水体(22)
外周を支持する支持棒(29)を立設している。 さらに、(30)は弁ケース+11下端開口に取付けら
れるカバーで、中央に開口(31)を有する環状体であ
る。このカバー(30)は第7図に示すように、弁ケー
スQO)のフランジ(11)にビス(32)を介して連
設されるが、同時にビス(32)は弁ケース(10)自
体を取付金具(33)により弁室(7)に装着すること
ができる。即ち、筒状壁(6)の3位置には前述のよう
に弁ケース(10)装着用の装着口(9)が開設されて
いて、第5図及び第7図で明らかなように装着口(9)
の下端壁(9a)に係合するような取付金具(33)を
用いることにより、ビス(32)を介して弁ケース(1
0)、カバー(30)を弁室(7)内に装着することが
できるのである。 以上のような弁室(7)、及び同弁室(7)内に配置さ
れる弁ケース(10)等の構成部材により雨水流入防止
弁(A>が蓋体(1)の裏面に形成され、通常時は第5
図に示すような状態に弁体く16)が弁ケース(10)
の傾斜壁(12)から解離し、弁nJ1(17a)が蓋
体(1)の通孔(4)の中央部(4a)裏面に当接して
いる。 圧縮コイルスプリング(21)は弁ケース(10)と弁
体く16)間に介設され、同弁体(16) 、スプリン
グケース(18) 、吸水体(22) 、支持板(23
)等の可動部材を昇降させるためのもので、吸水体(2
2)が水を含浸していない状態では、これら可動部材を
第5図の状態に位置させることができるようなバネ定数
とする。同第5図において、通孔(4)、弁ケース(1
ωの開口(13)、及びカバー(30)の開口(31)
によって外界とマンホール内とルよ連通しており、同マ
ンホール内から有害ガス等を放出することができるとと
もに、マンホール内水位上昇による空気等の流体の異常
昇圧を防止することかできる。 次に、降雨時には通孔(4)から雨水が流入し、これに
より吸水体(22)が水を含浸してその重量が通常時よ
り増加する。ここで、前記の圧縮コイルスプリング(2
1)の条件に加え、水含浸による吸水体(22)の重量
がある臨界点を越えた時には収縮するようなバネ定数と
すれば、重量の増加によって弁体(16)等の可動部材
が下降する。この時、スプリングケース(18)には切
欠(20)を弁体(16)が傾斜壁(12)に着座可能
となるような長さに形成しているので、この切欠(20
)が弁軸案内杆(14)を外挿して移動でき、昇降に支
障はない。 上記によって、第5図の一点鎖線で示すように弁体(1
6)が傾斜壁(12)に着座し、通孔(4)とマンホー
ル内を非連通とし、雨水の流入を防ぐことができる。蓋
体(1)上面に水が溜水して弁体(]6)方向に水圧が
負荷されたとしても、この水圧は閉昇方向に作用するの
で開弁することはなく、雨水の流入を完全に防止できる
。 次に、吸水体(22)が乾燥して水分が排除された時に
は、その質量が軽くなるため、圧縮コイルスプリング(
21)が復元して、元の状態に戻り、通気を行なうこと
ができる。 〔効果〕 発明の効果を列挙すると下記の通りである。 (1)雨水の流入時には吸水体の重量増加によって自動
的に閉弁することができ、地下構造物内に多量の水の流
入を防ぐことができるので、同地下構造物及び処理施設
の保全を図ることができる。 (2)蓋体上面に溜水して水圧が負荷されてもこの水圧
は閉弁方向に作用するので開弁することはなく、確実に
雨水流入を防止できる。 (3)吸水体による重量の増減に基いて弁体が昇降する
ので外気と地下構造物内との連通、非連通を自動的に行
なうことができる。 (4)降雨中断後は、吸水体の乾燥により弁体が自動的
に元の位置に復元して、外界と地下構造物0 とが通気可能となり、さらに地下構造物内の空気等圧縮
された流体を外界に排出することができる。 4、図面の簡単な説明 第1図は従来の雨水流入防止装置の要部断面図、第2図
はマンポール蓋の表面平面図、第3図は同裏面平面図、
第4図は第2図のT−T線矢視による断面図、第5図は
雨水流入防止弁を示す断面図、第6図は弁ケースの平面
図、第7図は弁ケースと弁室との接続構造を示す正面図
、第8図はスプリングケースの正面図、第9図はカバー
の平面図、第10図は同断面図である。 (1)蓋体 (413m孔 00)弁ケース (I3)開口 (16)弁体 (17)弁軸 (21)圧縮コイルスプリング (22)吸水体 (A)雨水流入防止弁 1 179−
Fig. 1 is a sectional view of the main parts of a conventional rainwater inflow prevention device, Fig. 2 is a top view of the manhole cover, and Fig. 3 is a back plan view of the manhole cover.
Figure 4 is a sectional view taken along the line I-I in Figure 2, Figure 5 is a sectional view showing the rainwater inflow prevention valve, Figure 6 is a plan view of the valve case, and Figure 7 is the valve case and valve chamber. 8 is a front view of the spring case, FIG. 9 is a plan view of the cover, and FIG. 10 is a sectional view thereof. ill Lid body (4) Through hole 00 Valve case (13) Opening (16) Valve body (17) Valve stem (21) Compression coil spring (22) Water absorbing body (A) Rainwater inflow prevention valve 1 Fig. 1 Fig. 2 @ 3 Figure-1f19 Figure 23 Procedure page ↑ Official document 1, Display of case ■ 1958 Patent application No. 104784 2, Title of invention Rainwater inflow prevention device for cover for underground structure 3, Amendment person case Relationship with Patent Applicant 4, Agent Akira Rei■ Book 1, Title of Invention Rainwater inflow prevention device for underground structure lid 2, Claim 1, A through hole is provided through the lid body, A rainwater inflow prevention valve is provided on the back surface, and the rainwater inflow prevention valve is supported so as to be movable up and down by a valve case that is attached to the back surface of the lid body and has an opening that communicates a through hole with the inside of the lid body, and a valve opening case. A valve shaft having a valve body located on the upper side of the opening and that moves toward and away from the peripheral edge of the opening, a compression coil spring that biases the valve body and the valve shaft in the valve opening direction, and a compression coil spring located on the lower side of the opening. What is claimed is: 1. A rainwater inflow prevention device for a lid for an underground structure, characterized in that it has a water absorbing body positioned and integrally connected to a valve stem. 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a rainwater inflow prevention device for a cover for an underground structure that closes a manhole or the like. [Prior Art and its Problems] Previously, the present inventor provided a rainwater inflow prevention device for a manhole cover, etc., described in Japanese Patent Publication No. 58'-15569. As shown in Fig. 1, a communication hole (101) is installed in the lid (100) to prevent abnormal pressure increase in the vertical hole.
A float valve (102) is arranged so as to prevent rainwater from flowing down into the vertical hole from the communication hole (101) during rain or the like. The flow l-valve (102) is connected to a float chamber (10) supported by a mounting plate (103) connected to the back surface of the lid (100).
4), and the mounting receiving plate (103) has a window (105) for discharging earth and sand. The lower end of the float valve (102) has a ball valve storage chamber (106) with an inclined surface (106).
07) is recessed, and a ball valve (108) is installed in the same chamber. Further, a drainage hole (109) is formed in the mounting plate (103) corresponding to the mounting position of the ball valve (108) opposite to the hole (104a). In the above configuration, under normal conditions, the float valve (102) descends due to its own weight and maintains the outside of the lid and the inside of the lid (100) in a ventilated state through the communication hole (101), and also removes harmful gas from inside the vertical hole. Furthermore, it is designed to prevent abnormal pumping pressure. On the other hand, during rainfall, rainwater flows into the float chamber (104) from the communication hole (101,), and this inflow water flows through the hole (104a).
) and is discharged from the drainage hole (109). However, when the inflow becomes larger than the outflow from the hole (1,04a), the float valve (102) rises and the ball valve (1,04a) rises.
0B) is the inclined surface (106) in the ball valve accommodation chamber (107).
) is released, and the ball valve (10B) moves toward the drain hole (109) and closes the opening (104a). In this state, the float valve (102) rises rapidly,
The inclined wall (102a) of the float valve (102) is connected to the communication hole (
101) can be closed to prevent rainwater from flowing in. However, since the volume of flow 1 to valve (102) is constant, there is a limit to the buoyancy force exerted by the accumulated water in the float chamber (104). During floods, the water level may be lower than the lid (10
0) Since it is located higher up, as the water level rises,
The float valve (102) receives a downward force based on filtered water pressure due to increased water. When this downward acting force becomes larger than the buoyancy force received by the float valve (1G2),
There is a problem in that the float valve (102) descends and cannot close the opening (101a). [Object of the Invention] The object of the present invention is to solve the following problems, and to provide a device that can reliably prevent large amounts of rainwater from flowing in during abnormal rainfall. [Example] The present invention will be described below based on an example shown in the drawings. FIGS. 2 and 3 are a front and back plan view of a man-ball cover, which is commonly used as a cover for underground structures. In the figure,
(1) is a lid body in which a hinge attachment part (2) and a crowbar hole (3) are formed facing each other in the diametrical direction, and there are through holes (4) at four positions on a concentric circle that communicate the inside of the manhole vertical hole with the outside. is installed throughout. FIG. 4 is an enlarged cross-sectional view taken along the line I-I in FIG. The valve chamber (7) is approximately cylindrical. The valve chamber (7) is open at the lower end, and the cylindrical wall (6) is provided with a ventilation port (8) and a mounting port (9) for mounting the valve case, which will be described later. The through hole (4) is divided into three concentric bullet shapes, each having a central portion (4a) and a connecting portion (4b). FIG. 5 is a sectional view showing the valve case (10) installed in the valve chamber (7), and FIG. 6 is a plan view of the valve case Qllll. The valve case 00) is made of synthetic resin or the like and has a hollow cylindrical shape with an opening at the lower end, and has a flange (11) with screw holes (118) formed at the lower end. A forest-like inclined wall (12) whose diameter decreases downward from the upper end is formed with an opening (13) at the lower end, and a mouth-shaped valve shaft guide rod (14) is formed below the opening (13). ) are installed consecutively. This valve shaft guide rod (14) has a valve shaft sliding guide cylinder (15) vertically installed concentrically with the opening (13), and a valve body (16) made of an elastic material such as silicone rubber on the upper side. The valve shaft (17) with the attached valve is supported so as to be movable up and down. (18) supports the valve body (16) and connects the valve stem (7) to the annular gap (
As shown in FIG. 8, notches (20) having a width that allows insertion of the valve shaft guide rod (14) are formed at two positions facing each other in the diametrical direction. are doing. Further, (21) is a compression coil spring contained within the spring case (18) and interposed between the valve body (16) and the valve shaft guide rod (14). At the upper end of the valve stem (17), there is a valve head (17a) having a substantially spherical circumferential surface.
) is formed, and the valve body (16) is held between the lower surface of the valve head (17a) and a flange portion (18a) formed at the upper end of the spring case (18). In this embodiment, the valve body (16) made of rubber or the like is provided on both the upper and lower surfaces of the valve body (16).
A thin film (16 cm) is used to prevent trauma to the
a) is installed. The outer diameter of the valve body (16) is larger than the diameter of the flange (18a) and larger than the diameter of the opening (13) of the valve case (10). Therefore, when the valve stem (17) descends, the outer diameter of the valve body (16) The outer peripheral end can come into contact with and separate from the inclined wall (12), and the opening (1
3) can be opened and closed. (22) is a water absorbent body that can be impregnated with water, and in this example, it is made of polyvinyl alcohol resin and is formed into an annular shape and stacked in two stages, and the support plate (22) is integrally connected to the valve shaft (17).
23). The support plate (23) is formed in an annular shape as shown in FIGS. 9 and 10, and has a central opening (24) with an insertion hole (25) for the valve stem (17),
A connecting rod (26) extends radially from the insertion hole (25). In addition, a plurality of openings (28) are opened in the mounting surface (27) of the water absorbent body (22), and the water absorbent body (22) is placed on the end surface.
A support rod (29) is provided to support the outer periphery. Furthermore, (30) is a cover attached to the lower end opening of the valve case +11, which is an annular body having an opening (31) in the center. As shown in Fig. 7, this cover (30) is connected to the flange (11) of the valve case (QO) via a screw (32), but at the same time, the screw (32) is attached to the valve case (10) itself. It can be attached to the valve chamber (7) using the mounting bracket (33). That is, as mentioned above, mounting ports (9) for mounting the valve case (10) are provided at three positions of the cylindrical wall (6), and as is clear from FIGS. (9)
By using a mounting bracket (33) that engages with the lower end wall (9a) of the valve case (1
0), the cover (30) can be installed inside the valve chamber (7). A rainwater inflow prevention valve (A> is formed on the back surface of the lid body (1) by the above-mentioned valve chamber (7) and components such as the valve case (10) arranged in the valve chamber (7). , normally the fifth
The valve body (16) is in the state shown in the figure and the valve case (10) is
The valve nJ1 (17a) is separated from the inclined wall (12) of the lid (1), and the valve nJ1 (17a) is in contact with the back surface of the central portion (4a) of the through hole (4) of the lid (1). A compression coil spring (21) is interposed between the valve case (10) and the valve body (16), the valve body (16), the spring case (18), the water absorbing body (22), and the support plate (23).
) to raise and lower movable members such as water absorbers (2
2) has a spring constant that allows these movable members to be positioned in the state shown in FIG. 5 in a state in which water is not impregnated. In Figure 5, the through hole (4), the valve case (1
ω opening (13) and cover (30) opening (31)
This allows communication between the outside world and the inside of the manhole, making it possible to release harmful gases, etc. from inside the manhole, as well as preventing abnormal pressure rises in fluids such as air due to a rise in the water level inside the manhole. Next, when it rains, rainwater flows in through the through hole (4), which impregnates the water absorbent body (22) with water and increases its weight compared to normal times. Here, the compression coil spring (2
In addition to the condition 1), if the spring constant is set such that it contracts when the weight of the water absorbent body (22) impregnated with water exceeds a certain critical point, movable members such as the valve body (16) will descend due to the increase in weight. do. At this time, since a notch (20) is formed in the spring case (18) with a length that allows the valve body (16) to sit on the inclined wall (12), this notch (20) is formed in the spring case (18).
) can be moved by extrapolating the valve shaft guide rod (14), and there is no problem in going up and down. As a result of the above, the valve body (1
6) is seated on the inclined wall (12), and the through hole (4) and the inside of the manhole are not communicated with each other, thereby preventing rainwater from flowing in. Even if water accumulates on the top of the lid body (1) and water pressure is applied toward the valve body (6), this water pressure acts in the direction of closing and rising, so the valve will not open and prevent the inflow of rainwater. Completely preventable. Next, when the water absorbent body (22) dries and moisture is removed, its mass becomes lighter, so the compression coil spring (
21) is restored and returns to its original state, allowing ventilation. [Effects] The effects of the invention are listed below. (1) When rainwater flows in, the valve can be automatically closed due to the increased weight of the water absorber, preventing large amounts of water from flowing into the underground structure, thereby reducing the maintenance of the underground structure and treatment facility. can be achieved. (2) Even if water accumulates on the top surface of the lid and water pressure is applied, this water pressure acts in the direction of closing the valve, so the valve will not open, and rainwater can be reliably prevented from flowing in. (3) Since the valve body moves up and down based on the weight increase/decrease due to the water absorbing body, communication between the outside air and the inside of the underground structure can be automatically established and disconnected. (4) After the rain stops, the valve body automatically returns to its original position as the water absorber dries, allowing ventilation between the outside world and the underground structure, and further compressing the air inside the underground structure. Fluid can be discharged to the outside world. 4. Brief explanation of the drawings Fig. 1 is a sectional view of the main parts of a conventional rainwater inflow prevention device, Fig. 2 is a front view of the manpole cover, Fig. 3 is a back plan view of the same,
Figure 4 is a sectional view taken along the line T-T in Figure 2, Figure 5 is a sectional view showing the rainwater inflow prevention valve, Figure 6 is a plan view of the valve case, and Figure 7 is the valve case and valve chamber. 8 is a front view of the spring case, FIG. 9 is a plan view of the cover, and FIG. 10 is a sectional view thereof. (1) Lid body (413m hole 00) Valve case (I3) Opening (16) Valve body (17) Valve shaft (21) Compression coil spring (22) Water absorbing body (A) Rainwater inflow prevention valve 1 179-

Claims (1)

【特許請求の範囲】 ■、蓋体に通孔を貫設し、同蓋体裏面Gこ雨水流入防止
弁を設け、」1記雨水流入防止弁は、蓋体裏面に取付り
られ通孔と蓋体内部を連通ずる開口を有した弁ケースと
、開弁ケースしこ昇降可能に支持され上記開口の上位側
に位置して同開口周縁部に接離する弁体を備えた弁軸と
、開弁(本及び弁軸を開弁方向に付勢する圧縮コイルス
フ。 リングと、開口の下位側に位置して弁軸しこ一体連結し
た吸水体とを有していることを特徴とする地下構造物用
蓋の雨水流入防止装置。
[Claims] (1) A through hole is provided in the lid body, and a rainwater inflow prevention valve is provided on the back side of the lid body. a valve case having an opening that communicates with the inside of the lid body; a valve shaft that is supported so that the valve opening case can be raised and lowered and is located above the opening and has a valve body that approaches and separates from the peripheral edge of the opening; Valve opening (compression coil valve that biases the main and valve shaft in the valve opening direction) An underground valve characterized by having a ring and a water absorption body located on the lower side of the opening and integrally connected to the valve shaft. Rainwater inflow prevention device for structural lids.
JP58104784A 1983-06-11 1983-06-11 Preventor for inflow of rain water into underground structure cover Granted JPS59233029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58104784A JPS59233029A (en) 1983-06-11 1983-06-11 Preventor for inflow of rain water into underground structure cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58104784A JPS59233029A (en) 1983-06-11 1983-06-11 Preventor for inflow of rain water into underground structure cover

Publications (2)

Publication Number Publication Date
JPS59233029A true JPS59233029A (en) 1984-12-27
JPS627334B2 JPS627334B2 (en) 1987-02-17

Family

ID=14390092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58104784A Granted JPS59233029A (en) 1983-06-11 1983-06-11 Preventor for inflow of rain water into underground structure cover

Country Status (1)

Country Link
JP (1) JPS59233029A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401114A (en) * 1990-11-26 1995-03-28 Guggemos; Horst Manhole ventilation insert with duct shut-off device
KR100845570B1 (en) 2007-04-05 2008-07-11 송인진 Manhole cover for preventing rainwater inflow
US11891825B2 (en) * 2018-10-02 2024-02-06 Independence Materials Group, Llc Apparatus for supporting overhead structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401114A (en) * 1990-11-26 1995-03-28 Guggemos; Horst Manhole ventilation insert with duct shut-off device
KR100845570B1 (en) 2007-04-05 2008-07-11 송인진 Manhole cover for preventing rainwater inflow
US11891825B2 (en) * 2018-10-02 2024-02-06 Independence Materials Group, Llc Apparatus for supporting overhead structure

Also Published As

Publication number Publication date
JPS627334B2 (en) 1987-02-17

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