JP2001193108A - Fire hydrant with air valve - Google Patents
Fire hydrant with air valveInfo
- Publication number
- JP2001193108A JP2001193108A JP2000006788A JP2000006788A JP2001193108A JP 2001193108 A JP2001193108 A JP 2001193108A JP 2000006788 A JP2000006788 A JP 2000006788A JP 2000006788 A JP2000006788 A JP 2000006788A JP 2001193108 A JP2001193108 A JP 2001193108A
- Authority
- JP
- Japan
- Prior art keywords
- air valve
- air
- valve chamber
- opening
- adjusting plate
- 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
Links
Landscapes
- Float Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、フロート式空気
弁付き消火栓に関し、前記空気弁により配水管路内の滞
留空気を自動的に排出するようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire hydrant with a float type air valve, wherein the air valve automatically discharges stagnant air in a water distribution pipe.
【０００２】[0002]
【従来の技術】配水管路内に空気が溜まると、流動性が
阻害されて通水能力が低下し、出水不良の原因となる。
また、管路で常時空気溜まりとなっている部分は腐食の
進行が加速され、漏水につながり配管としての機能を果
たせなくなる問題がある。さらに大きな空気溜まりは管
内の脈動を増幅し、接続機器の作動や耐久性に悪影響を
及ぼすという問題もある。2. Description of the Related Art When air accumulates in a water distribution pipe, the flowability is impaired, the water flow capacity is reduced, and this causes poor water discharge.
Further, there is a problem that the progress of corrosion is accelerated in a portion of the pipeline where air is constantly accumulated, which leads to water leakage and the function as a piping cannot be performed. Further, there is a problem that the large air pool amplifies the pulsation in the pipe and adversely affects the operation and durability of the connected device.
【０００３】このような問題を解決するために、従来、
配水本管と消火栓との接続管に空気弁を接続する方法が
知られているが、空気弁を消火栓とは別に設ける方式で
は、配管設備に費用がかかって合理的ではない。このた
め、特開平１１ー１５８９４７号公報に示されるよう
に、消火栓に空気弁を一体に設けたものが提案されてい
る。In order to solve such a problem, conventionally,
A method of connecting an air valve to a connection pipe between a water distribution main pipe and a fire hydrant is known. However, a method in which an air valve is provided separately from a fire hydrant is expensive and unreasonable for piping equipment. Therefore, as disclosed in Japanese Patent Application Laid-Open No. H11-158947, a fire hydrant is provided with an air valve integrally.
【０００４】上記公報では、水の流入口を開閉する弁体
の内部にフロートが収容されるフロート室が形成され、
弁体の下端部にフロート室と連通する連通口が形成さ
れ、弁体にはフロート室に入った空気を外部へ排気する
排気通路が形成され、排気通路の一端にはフロートの浮
上又は下降によって開閉される空気弁口を設けて構成し
た空気弁が示されている。In the above publication, a float chamber for accommodating a float is formed inside a valve body that opens and closes a water inlet.
A communication port communicating with the float chamber is formed at the lower end of the valve body, and an exhaust passage for exhausting the air entering the float chamber to the outside is formed in the valve body, and at one end of the exhaust passage, the float floats or descends. An air valve provided with an air valve port to be opened and closed is shown.
【０００５】このような空気弁では一般に空気弁口は小
径であるため、配管の新設時や断水後の通水時など配管
内に初めて通水する時に配管内に滞留する多量の空気を
急速に排出することができない。このため前記公報に
は、前記フロート室にフロートの上部に上下動自在の主
弁を配置し、この主弁の下面中心部に設けた円筒状のボ
ス部から主弁の外周部に通じるバイパス路を形成してフ
ロート室の上部開口から多量の滞留空気を急速に排気す
るようにした空気弁も示されている。[0005] In such an air valve, since the air valve port is generally small in diameter, a large amount of air staying in the pipe can be rapidly removed when water is first passed through the pipe, such as when a new pipe is installed or when water is cut off after water is cut off. Can not be discharged. For this reason, in the above publication, a main valve that can move up and down is arranged in an upper part of the float in the float chamber, and a bypass passage leading from a cylindrical boss provided at the center of the lower surface of the main valve to an outer peripheral part of the main valve. Also shown is an air valve that forms a large air flow to rapidly exhaust large amounts of stagnant air from the upper opening of the float chamber.
【０００６】[0006]
【発明が解決しようとする課題】しかし、前述の配管内
の滞留空気が急速に排気され始めると、前記主弁の下面
には管内圧力が作用するのに対し、その上面に作用する
圧力は、フロート室の上部開口から空気が排出されるた
めに、前記管内圧力よりも低くなる。この主弁上下面の
差圧は、滞留空気の排出量が多い程大きくなる。前記の
差圧による押上げ力Ｆ（Ｆ＝主弁の投影面積×差圧）が
前記主弁の自重よりも大きくなると、配管内に空気が多
量に残存しているにもかかわらず、軽量な材料で形成さ
れている主弁は浮き上がって前記上部開口を閉じる、所
謂弁体の吸着現象が生じる。このような現象が生じる
と、排気通路が閉塞し、前記のフロート及び主弁は空気
弁としての役割を果たさなくなる。However, when the stagnant air in the pipe starts to be rapidly exhausted, the pipe pressure acts on the lower face of the main valve, whereas the pressure acting on the upper face is: Since the air is discharged from the upper opening of the float chamber, the pressure becomes lower than the pressure in the pipe. The differential pressure between the upper and lower surfaces of the main valve increases as the amount of staying air discharged increases. When the pushing force F (F = projected area of main valve × differential pressure) due to the differential pressure becomes larger than the own weight of the main valve, a light weight is obtained despite a large amount of air remaining in the piping. The main valve made of a material floats up and closes the upper opening, a so-called valve element adsorption phenomenon occurs. When such a phenomenon occurs, the exhaust passage is blocked, and the float and the main valve no longer serve as air valves.
【０００７】なお、ＪＩＳＢ２０６３水道用空気弁４・
１・５節には、多量排気に際して遊動弁体やフロート弁
体が排気によって吸い上げられ、大空気孔を閉塞しては
ならない旨が規定されており、前述の主弁即ち弁体の吸
着現象を生じる空気弁はＪＩＳ規格にも適合しないこと
になる。In addition, JISB2063 air valve for water supply 4.
Sections 1.5 specify that the floating valve element and the float valve element should not be sucked up by the exhaust when the large amount of air is exhausted and should not close the large air hole. The resulting air valve will not comply with JIS standards.
【０００８】そこで、この発明の課題は、消火栓に一体
に設けたフロート式空気弁において、配管内の多量の滞
留空気を急速に排出し、しかも残存しないようにするた
めに、前記空気弁の弁体の吸着現象を防止することであ
る。Accordingly, an object of the present invention is to provide a float type air valve provided integrally with a fire hydrant so that a large amount of stagnant air in a pipe can be rapidly discharged and not left. The purpose is to prevent body adsorption.
【０００９】[0009]
【課題を解決するための手段】前記の課題を解決するた
めに、この発明は以下の構成を採用したのである。即
ち、配水管に接続される水の流入口と、前記流入口を開
閉する主弁体と、前記主弁体の開放により前記流入口か
ら流入した水を流出させる流出口とを有し、前記主弁体
は前記流入口の弁座の内側に開放された下部開口と、そ
の下部開口に連通した空気弁室、その空気弁室の上部に
開放され、かつ、大気に連通した上部開口とを有し、前
記空気弁室に収容されたフロート付き空気弁により前記
上部開口を開閉するようにした空気弁付き消火栓におい
て、上記空気弁室の下部開口に調整板を固定し、前記調
整板に前記空気弁に対向した空気量調整穴を設け、前記
調整板の周囲に前記空気弁室の下部開口から上部開口に
連通したバイパス路を形成したのである。In order to solve the above-mentioned problems, the present invention employs the following constitution. That is, having an inflow port of water connected to the water distribution pipe, a main valve body that opens and closes the inflow port, and an outflow port that allows water that flows in from the inflow port to flow out by opening the main valve body, The main valve body has a lower opening that is opened inside the valve seat of the inflow port, an air valve chamber that communicates with the lower opening, and an upper opening that opens to the upper part of the air valve chamber and communicates with the atmosphere. In a fire hydrant with an air valve having an upper opening opened and closed by an air valve with a float housed in the air valve chamber, an adjusting plate is fixed to a lower opening of the air valve chamber, and the adjusting plate is fixed to the adjusting plate. An air amount adjusting hole facing the air valve is provided, and a bypass passage communicating from the lower opening to the upper opening of the air valve chamber is formed around the adjusting plate.
【００１０】上記の構成により、配管内の滞留空気は、
調整板の周囲に形成したバイパス路を通って空気弁室の
上部開口から外部へ排出されるため、空気量調整穴を介
して作用する一部を除いて滞留空気の排気流はフロート
付き空気弁の弁体に直接には作用しない。また、空気量
調整穴を介して作用する一部の排気流には前記弁体を浮
き上がらせるだけの押上げ力はない。その結果、前記弁
体の上下面には前述のような差圧は発生せず、弁体の吸
着現象を生じないため、配管内の多量の滞留空気を急速
にしかも残存することなく排出することができる。[0010] With the above configuration, the air retained in the pipe is
Since the air is discharged from the upper opening of the air valve chamber to the outside through a bypass formed around the adjusting plate, the exhaust air of the stagnant air except for the part that acts through the air amount adjusting hole is used as an air valve with a float. It does not act directly on the valve body. Also, a part of the exhaust flow acting through the air amount adjusting hole does not have a pushing force enough to lift the valve element. As a result, the above-mentioned differential pressure does not occur on the upper and lower surfaces of the valve body, and the adsorption phenomenon of the valve body does not occur, so that a large amount of air remaining in the pipe is quickly and without being left. Can be.
【００１１】また、滞留空気の排出に伴い、水がフロー
ト付き空気弁の弁体まで上昇し、弁体の上面に水流が達
すると、その水流によって前記空気弁は下方へ押さえ付
けられるが、空気量調整穴を通過した水流により前記空
気弁には上方への力が作用し、空気弁室内の水位の上昇
による前記空気弁への浮力の増加も加わって、前記空気
弁が上方に押し上げられて空気弁室の上部開口を閉じる
ため、外部への水の流出が防止される。Further, with the discharge of the staying air, the water rises to the valve body of the air valve with the float, and when the water flow reaches the upper surface of the valve body, the water flow pushes the air valve downward. An upward force acts on the air valve due to the water flow passing through the volume adjustment hole, and an increase in buoyancy to the air valve due to a rise in the water level in the air valve chamber is also applied, whereby the air valve is pushed upward. Since the upper opening of the air valve chamber is closed, outflow of water to the outside is prevented.
【００１２】さらに、空気量調整穴には、調整板内に溜
まった水を排出する作用もある。この作用により、前述
の配管内に初めて通水する時に、フロート付き空気弁が
調整板に接触する空気弁室の下端の位置するため、前記
のバイパス路が十分に連通する。Further, the air amount adjusting hole also has an operation of discharging water accumulated in the adjusting plate. By this operation, when water is first passed through the pipe, the air valve with the float is located at the lower end of the air valve chamber in contact with the adjustment plate, and thus the bypass path is sufficiently connected.
【００１３】なお、前述の調整板の「固定」の意味は、
いずれも若干のがたつきを含むものであり、以下におい
ても同様である。The meaning of the above-mentioned "fixed" of the adjusting plate is as follows.
Each of them includes some backlash, and the same applies to the following.
【００１４】前記調整板が円板により形成され、前記調
整板を前記空気弁室の内側壁に係合により固定し、前記
調整板の外周部と前記内側壁との間に空隙を形成し、前
記調整板の下面と前記空気弁室下部の調整板受け部との
間に前記下部開口から内部に通じる空隙を形成し、前記
の二つの空隙を通じて前記下部開口と上部開口とを連通
させて前記バイパス路を形成することが望ましい。[0014] The adjusting plate is formed of a circular plate, the adjusting plate is fixed to the inner wall of the air valve chamber by engagement, and a gap is formed between the outer peripheral portion of the adjusting plate and the inner wall. A gap is formed between the lower surface of the adjustment plate and the adjustment plate receiving portion at the lower part of the air valve chamber so as to communicate with the inside from the lower opening, and the lower opening and the upper opening communicate with each other through the two gaps. It is desirable to form a bypass.
【００１５】上記の構成によっても、調整板の外周部を
通過する滞留空気の排気流の一部が前記空気弁の弁体に
作用するが、バイパス路を通過する排気流に比べて少量
であるため、前述のような弁体の吸着現象は生じない。
また、調整板の形状を円板とすることにより、製作上及
び取付け上の利便がある。According to the above construction, a part of the exhaust flow of the stagnant air passing through the outer peripheral portion of the adjusting plate acts on the valve element of the air valve, but is smaller than the exhaust flow passing through the bypass. Therefore, the adsorption phenomenon of the valve element as described above does not occur.
In addition, by making the shape of the adjusting plate a disk, there is convenience in manufacturing and mounting.
【００１６】なお、前記空隙は底板の下面又は調整板受
け部の上面に周方向に不連続な突起を設けることにより
形成することができる。The gap can be formed by providing a discontinuous projection in the circumferential direction on the lower surface of the bottom plate or the upper surface of the adjustment plate receiving portion.
【００１７】前記調整板の外縁部に切欠きを設け、前記
調整板の外縁部と前記内側壁との間に形成された空隙と
前記調整板の下面と前記空気弁室下部の調整板受け部と
の間に形成された空隙とを通じて前記空気弁室の下部開
口と上部開口とを連通させて前記のバイパス路を形成す
ることが望ましい。A notch is provided at an outer edge of the adjusting plate, a gap formed between the outer edge of the adjusting plate and the inner wall, a lower surface of the adjusting plate, and an adjusting plate receiving portion at a lower portion of the air valve chamber. It is preferable that the lower opening and the upper opening of the air valve chamber communicate with each other through a gap formed between the air passage and the air passage to form the bypass passage.
【００１８】上記の構成により、空気弁室内を滞留空気
の排気流がより通過しやすくなり、上部開口への排気が
容易となる。According to the above configuration, the exhaust flow of the stagnant air more easily passes through the air valve chamber, and the exhaust to the upper opening becomes easier.
【００１９】前記調整板の外周部に通気穴を有する側壁
を設け、前記側壁を前記フロート付き空気弁の外周壁と
前記空気弁室の内側壁とで形成される空間内に挿入して
前記内側壁上部に押し当てることにより前記調整板を固
定し、前記通気穴を通じて前記バイパス路を形成するこ
とが望ましい。A side wall having a ventilation hole is provided on an outer peripheral portion of the adjusting plate, and the side wall is inserted into a space formed by an outer peripheral wall of the air valve with a float and an inner side wall of the air valve chamber to be inserted into the inner side. It is preferable that the adjustment plate is fixed by pressing against the upper part of the wall, and the bypass is formed through the ventilation hole.
【００２０】上記の構成により、下部開口から上部開口
に連通するバイパスがより確実に形成されるため、滞留
空気の排気流の大部分が前記空気弁の弁体に直接作用す
ることなく、前述の弁体の吸着現象が防止され、前記空
隙及び前記通気穴を通じて空気弁室の下部開口から上部
開口へ容易に排気される。According to the above configuration, since a bypass communicating from the lower opening to the upper opening is more reliably formed, most of the exhaust flow of the stagnated air does not directly act on the valve body of the air valve. The adsorption phenomenon of the valve body is prevented, and the air is easily exhausted from the lower opening to the upper opening of the air valve chamber through the gap and the ventilation hole.
【００２１】前記調整板の外縁部に設けた切欠きの内側
に側壁を設け、前記側壁を前記フロート付き空気弁の外
周壁と前記空気弁室の内側壁とで形成される空間内に挿
入し、前記切欠きを含む空隙及び前記空気弁室下部に形
成した空隙と前記内側壁上部の空間とを通じて前記バイ
パス路を形成することが望ましい。A side wall is provided inside a notch provided at an outer edge of the adjusting plate, and the side wall is inserted into a space formed by an outer peripheral wall of the air valve with a float and an inner side wall of the air valve chamber. Preferably, the bypass path is formed through a gap including the notch, a gap formed below the air valve chamber, and a space above the inner wall.
【００２２】上記の構成により、バイパス路がより確実
に形成され、かつ、空気弁室内を前記排気流がより通過
しやすくなり、上部開口への排気が容易となる。According to the above configuration, the bypass passage is more reliably formed, and the exhaust flow is more easily passed through the air valve chamber, and the exhaust to the upper opening is facilitated.
【００２３】[0023]
【発明の実施の形態】以下、この発明の実施の形態を添
付の図１から図６に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００２４】図１に示したこの発明の実施形態の空気弁
付き消火栓１は、配水管と接続される弁箱２を具備して
いる。弁箱２の下部には流入口３が形成され、その下端
には配水管と接続するためにフランジ４が形成され、そ
の上端には弁座５が形成されている。弁箱２の側部上方
には流出口６が形成され、流出口６には接続管７を介し
て口金座８、押し輪９、口金１０及び口金蓋１１などが
設けられている。The fire hydrant 1 with an air valve according to the embodiment of the present invention shown in FIG. 1 includes a valve box 2 connected to a water pipe. An inflow port 3 is formed at a lower portion of the valve box 2, a flange 4 is formed at a lower end thereof for connection with a water distribution pipe, and a valve seat 5 is formed at an upper end thereof. An outlet 6 is formed above the side portion of the valve box 2, and the outlet 6 is provided with a base 8, a press ring 9, a base 10, a base lid 11, and the like via a connection pipe 7.
【００２５】弁箱２には流入口３を開閉する主弁体１２
が設けられ、主弁体１２にはその下部開口１３に連通し
た空気弁室１４が形成されている。空気弁室１４の下端
には、調整板受け部１５が取付けられ、その下面にはガ
スケット１６が装着され、弁座５とガスケット１６が密
着した状態で流入口３が閉じられる。空気弁室１４の上
部には外面が四角形状のねじ筒１７が形成され、スピン
ドル１８の先端部に設けたねじ部とねじ結合している。The valve box 2 has a main valve body 12 for opening and closing the inflow port 3.
The main valve body 12 is formed with an air valve chamber 14 communicating with a lower opening 13 thereof. An adjusting plate receiving portion 15 is attached to a lower end of the air valve chamber 14, and a gasket 16 is attached to a lower surface of the adjusting plate receiving portion 15, and the inflow port 3 is closed with the valve seat 5 and the gasket 16 in close contact with each other. A screw tube 17 having a square outer surface is formed at the upper part of the air valve chamber 14 and is screwed to a screw portion provided at the tip of a spindle 18.
【００２６】スピンドル１８は中空体で形成され、その
中央部外周にはフランジ１９が一体に設けられ、このフ
ランジ１９は弁蓋２０の下側に装着されたナット２１に
よりワッシャー２２を介して回転自在に支持されてい
る。それにより、スピンドル１８は一定の位置で回転が
可能となっている。ナット２１の内周面には四角形状の
ガイド面が形成されており、このガイド面にねじ筒１７
がガイドされているため、スピンドル１８の回転によっ
て、主弁体１２は回転することなく、上下方向に移動が
可能であり、弁座５とガスケット１６を介して流入口３
を開閉することができるようになっている。The spindle 18 is formed of a hollow body, and a flange 19 is integrally provided on the outer periphery of a central portion thereof. The flange 19 is rotatable via a washer 22 by a nut 21 mounted on a lower side of a valve cover 20. It is supported by. Thereby, the spindle 18 can rotate at a fixed position. A square guide surface is formed on the inner peripheral surface of the nut 21.
Is guided, the main valve body 12 can move in the vertical direction without rotating by the rotation of the spindle 18, and the inflow port 3 can be moved through the valve seat 5 and the gasket 16.
Can be opened and closed.
【００２７】空気弁室１４の上部にはシールパッキンを
装着した弁座２３が設けられ、その内側外面にスピンド
ル１８の内径に嵌合される円筒部２５が形成され、その
開口即ち上部開口２４は中空スピンドル１８と連通して
いる。そしてスピンドル１８の上部には大気への連通穴
２６が設けられている。スピンドル１８を取付けた弁蓋
２０のボス部２７の開口部にはシールパッキン２８が装
着され、パッキン押え２９により固定され、スピンドル
１８と弁蓋２０との隙間からの水漏れが防止されてい
る。またスピンドル１８の先端部には消火栓開閉用ハン
ドルと係合するキャップ４４が取付けられている。A valve seat 23 provided with a seal packing is provided at an upper portion of the air valve chamber 14, and a cylindrical portion 25 is formed on an inner outer surface thereof so as to be fitted to an inner diameter of the spindle 18, and its opening, that is, an upper opening 24 is formed. It communicates with the hollow spindle 18. At the upper part of the spindle 18, a communication hole 26 to the atmosphere is provided. A seal packing 28 is attached to the opening of the boss 27 of the valve cover 20 to which the spindle 18 is attached, and is fixed by a packing presser 29 to prevent water leakage from a gap between the spindle 18 and the valve cover 20. A cap 44 is attached to the tip of the spindle 18 so as to engage with a handle for opening and closing a fire hydrant.
【００２８】前記空気弁室１４には、フロート３０及び
弁体３１からなるフロート付空気弁３２が収容されてお
り、弁体３１には、空気弁口３３が設けられている。空
気弁室１４の下部開口１３には、底板３４とその外周部
に設けられた円筒状の側壁３５とからなる調整板３６が
固定されている。この調整板３６の側壁３５は、フロー
ト付き空気弁３２の外周部と空気弁室１４の内側壁とで
形成される空間内に挿入され、その先端は空気弁室１４
の内側壁上部に接触している。前記底板３４の下面に
は、周方向に不連続な突起３７が設けられ、調整板受け
部１５との間に空隙を形成している。The air valve chamber 14 accommodates an air valve 32 with a float comprising a float 30 and a valve element 31, and the valve element 31 is provided with an air valve port 33. To the lower opening 13 of the air valve chamber 14, an adjustment plate 36 composed of a bottom plate 34 and a cylindrical side wall 35 provided on the outer periphery thereof is fixed. The side wall 35 of the adjusting plate 36 is inserted into a space formed by the outer peripheral portion of the air valve 32 with a float and the inner side wall of the air valve chamber 14, and the tip thereof is connected to the air valve chamber 14.
Is in contact with the upper part of the inner wall. On the lower surface of the bottom plate 34, a projection 37 that is discontinuous in the circumferential direction is provided, and a gap is formed between the bottom plate 34 and the adjustment plate receiving portion 15.
【００２９】底板３４の中央部には、空気量調整穴３８
及びその上部に環状の突起３９が形成され、底板上面の
フロート３０の外縁部に対向する位置に環状の突起３
９’が形成されている（図２参照）。これらの突起３
９、３９’により、フロート付き空気弁３２は空気弁室
１４の下端に位置するときに底板３４からわずかの間隙
をもって支持されている。また、調整板３６の側壁３５
の上部には周方向に通気穴４０が設けられている（図３
参照）。At the center of the bottom plate 34, an air amount adjusting hole 38 is provided.
An annular projection 39 is formed on the upper portion thereof, and the annular projection 3 is formed at a position facing the outer edge of the float 30 on the upper surface of the bottom plate.
9 'is formed (see FIG. 2). These projections 3
9 and 39 ′, the float air valve 32 is supported with a small gap from the bottom plate 34 when located at the lower end of the air valve chamber 14. The side wall 35 of the adjustment plate 36
A ventilation hole 40 is provided in the upper part in the circumferential direction (FIG. 3).
reference).
【００３０】このように、突起３７により底板３４と調
整板受け部１５との間に形成された空隙と、側壁３５と
空気弁室１４の内側壁とで形成される空間及び通気穴４
０を通じて空気弁室１４の下部開口１３から上部開口２
４へ連通するバイパス路が確実に形成されている。As described above, the space formed by the projection 37 between the bottom plate 34 and the adjustment plate receiving portion 15, the space formed by the side wall 35 and the inner side wall of the air valve chamber 14, and the ventilation hole 4.
0 through the lower opening 13 of the air valve chamber 14 to the upper opening 2
4 is surely formed.
【００３１】空気弁室１４の上部に設けた弁座２３の内
側に対向する位置に、フロート付き空気弁３２の弁体３
１の偏心した位置に空気弁口３３が設けられ、この弁口
３３は、図４に示すように、フロート付き空気弁３２が
上部開口２４を閉じた状態においてフロート３０と空気
弁室１４とともに空気弁を構成する。The valve body 3 of the air valve 32 with a float is located at a position facing the inside of the valve seat 23 provided above the air valve chamber 14.
1, an air valve port 33 is provided at an eccentric position. As shown in FIG. 4, when the air valve 32 with a float closes the upper opening 24, the air port 33 Configure the valve.
【００３２】この発明の実施の形態は以上のような構成
であり、以下にその作用について説明する。The embodiment of the present invention is configured as described above, and its operation will be described below.
【００３３】配管の新設時や断水後の通水時など初めて
通水する時には、空気弁室１４に水が殆ど入っていない
ので、フロート付き空気弁３２は重力により下降して底
板３４の突起３９、３９’に接触しており、上部開口２
４は開放されている。いま主弁体１２が流入口３を閉じ
た状態において通水が開始されると、配管内の滞留空気
の排気流の大部分は空気弁室１４の下部開口１３から、
底板３４の下面と調整板受け部１５との間に突起３７に
より形成される空隙と、側壁３５と空気弁室１４の内側
壁とで形成される空間及び通気穴４０とを通じて上部開
口２４へと連通したバイパス路を通過し、底板３４の空
気量調整穴３８を介して作用する一部の排気流を除い
て、前記排気流はフロート付き空気弁３２の弁体３１に
は直接的には作用しない。また、空気量調整穴３８から
作用する一部の排気流には弁体３１を浮き上がらせるだ
けの押上げ力はない。その結果、弁体３１の上下面には
前述のような差圧は発生せず、弁体の吸着現象を生じな
いため、配管内の滞留空気を上部開口２４からスピンド
ルに設けた連通穴２６を通じて急速にしかも残存するこ
となく外部へ排出できる。When water is passed for the first time, such as when a new pipe is installed or when water is cut off after the water is cut off, the air valve chamber 14 has almost no water. , 39 ′ and the upper opening 2
4 is open. When water flow is started in a state where the main valve body 12 closes the inflow port 3, most of the exhaust flow of the staying air in the pipe flows from the lower opening 13 of the air valve chamber 14.
Through the gap formed by the protrusion 37 between the lower surface of the bottom plate 34 and the adjustment plate receiving portion 15, the space formed by the side wall 35 and the inner side wall of the air valve chamber 14, and the ventilation hole 40, the air flows into the upper opening 24. Except for a part of the exhaust flow that passes through the communicating bypass passage and acts through the air amount adjusting hole 38 of the bottom plate 34, the exhaust flow directly acts on the valve element 31 of the air valve 32 with a float. do not do. Also, a part of the exhaust flow acting from the air amount adjusting hole 38 does not have a pushing force enough to lift the valve element 31. As a result, the above-mentioned differential pressure does not occur on the upper and lower surfaces of the valve element 31 and the adsorption phenomenon of the valve element does not occur, so that the air remaining in the pipe is supplied from the upper opening 24 through the communication hole 26 provided in the spindle. It can be discharged to the outside quickly and without remaining.
【００３４】滞留空気の排気に伴い、水がフロート付き
空気弁３２の弁体３１まで上昇し、弁体３１の上面に水
流が達すると、その水流によってフロート付空気弁３２
は下方へ押さえ付けられるが、空気量調整穴３８を通過
した水流はフロート付空気弁３２に上方への力を与え、
また、空気弁室１４内の水位の上昇によるフロート付き
空気弁３２への浮力の増加も加わって、フロート付き空
気弁３２が上方に押し上げられて空気弁室１４の上部開
口２４を閉じるため（図４参照）、外部への水の流出が
防止される。この時、前記の底板上面に設けた突起３
９、３９’により形成されるフロート３０の下面との空
隙は空気量調整穴３８を通過した水流がフロート付き空
気弁３２を押し上げやすくする作用を有する。As the accumulated air is exhausted, the water rises to the valve element 31 of the air valve 32 with a float, and when the water flow reaches the upper surface of the valve element 31, the water flow causes the air valve 32 with the float to flow.
Is pressed down, but the water flow passing through the air amount adjustment hole 38 gives an upward force to the air valve 32 with float,
In addition, an increase in the buoyancy of the air valve 32 with a float due to the rise in the water level in the air valve chamber 14 is added, and the air valve 32 with the float is pushed upward to close the upper opening 24 of the air valve chamber 14 (FIG. 4), outflow of water to the outside is prevented. At this time, the protrusion 3 provided on the upper surface of the bottom plate is used.
The gap formed between the lower surface of the float 30 and the lower surface of the float 39 has an effect of making it easy for the water flow passing through the air amount adjusting hole 38 to push up the air valve 32 with the float.
【００３５】さらに、配管内の水流から分離した空気が
空気弁室１４に滞留し、空気弁室１４の水位がフロート
３０の下面まで下がってくると、空気弁室１４の内部圧
力と外部圧力の差圧に空気弁口３３の内径面積を乗じた
大きさの押上げ力がフロート３０に作用する。空気弁口
３３は、前述のように、弁体３１の偏心した位置に設け
られているため、フロート３０が自重により空気弁口３
３を支点にして傾き、滞留空気が空気弁口３３から上部
開口２４を通って外部に排出される。滞留空気が外部に
排出されると、前記差圧が小さくなり、前記押上げ力も
小さくなるため、フロート３０全体が下降する。一方、
弁体３１には前記差圧に弁座２３の内径面積を乗じた大
きさの押上げ力が作用するため、上部開口２４を閉じた
ままである。Further, when the air separated from the water flow in the pipe stays in the air valve chamber 14 and the water level of the air valve chamber 14 falls to the lower surface of the float 30, the internal pressure of the air valve chamber 14 and the external pressure are reduced. A lifting force having a magnitude obtained by multiplying the differential pressure by the inner diameter area of the air valve port 33 acts on the float 30. As described above, since the air valve port 33 is provided at an eccentric position of the valve element 31, the float 30 is moved by its own weight to the air valve port 3.
3, the staying air is discharged from the air valve port 33 to the outside through the upper opening 24. When the stagnant air is discharged to the outside, the differential pressure decreases and the pushing force decreases, so that the entire float 30 descends. on the other hand,
Since the push-up force of the magnitude obtained by multiplying the differential pressure by the inner diameter area of the valve seat 23 acts on the valve element 31, the upper opening 24 is kept closed.
【００３６】空気弁口３３から上部開口２４を通って外
部へ滞留空気の排出が続くと、前記差圧が小さくなり、
弁体３１に作用する前記押上げ力も小さくなるため、弁
体３１は自重により下降して弁座２３から離れ、空気弁
室１４に滞留している空気は直接上部開口２４から外部
に排出される。As the staying air continues to be discharged from the air valve port 33 to the outside through the upper opening 24, the differential pressure decreases,
Since the pushing force acting on the valve element 31 is also reduced, the valve element 31 descends by its own weight and separates from the valve seat 23, and the air retained in the air valve chamber 14 is directly discharged to the outside from the upper opening 24. .
【００３７】他の実施形態として、図５（ａ）に示すよ
うに、調整板３６として中央部に空気量調整穴３８を有
する円板を用いることができる。調整板３６は、空気弁
室１４の内壁の周方向に不連続的に設けた突出部４２に
係合して固定され、その外縁部に図５（ｂ）に示すよう
に切欠き４１を有し、前記内側壁との間に空隙が形成さ
れている。調整板３６の下面には周方向に不連続的に突
起３７が設けられ、調整板受け部１５との間に空隙が形
成されている。これらの二つの空隙を通じて空気弁室１
４の下部開口１３と上部開口２４が連通したバイパス路
が形成されている。また調整板３６の上面にも周方向に
環状の突起４３、４３’が形成され、前述のように、フ
ロート付き空気弁３２は空気弁室１４の下端に位置する
ときに調整板３６の突起４３、４３’に支持されてい
る。As another embodiment, as shown in FIG. 5A, a disk having an air amount adjusting hole 38 at the center can be used as the adjusting plate 36. The adjusting plate 36 is engaged with and fixed to a protrusion 42 provided discontinuously in the circumferential direction of the inner wall of the air valve chamber 14, and has a notch 41 at the outer edge thereof as shown in FIG. A gap is formed between the inner wall and the inner wall. A protrusion 37 is provided discontinuously in the circumferential direction on the lower surface of the adjustment plate 36, and a gap is formed between the adjustment plate 36 and the adjustment plate receiving portion 15. The air valve chamber 1
4, a bypass path is formed in which the lower opening 13 and the upper opening 24 communicate with each other. Also, annular protrusions 43 and 43 ′ are formed in the circumferential direction on the upper surface of the adjustment plate 36, and as described above, the air valve 32 with the float is located at the lower end of the air valve chamber 14. , 43 '.
【００３８】このような構成によっても、滞留空気の排
気流の大部分は、切欠き４１によって通過がより容易と
なり、バイパス路を通じて上部開口２４へ排気される。
空気量調整穴３８を通過する以外にも切欠き部４１と前
記内側壁との間を通過する排気流の一部がフロート付き
空気弁３２の弁体３１に作用するが、バイパス路を通過
する排気流に比べて少量であるため、前述のような弁体
の吸着現象は生じず、滞留空気は支障なく外部へ排出さ
れる。また、前述のように、突起４３、４３’により形
成される調整板３６とフロート３０の下面との空隙は空
気量調整穴３８を通過した水流がフロート付き空気弁３
２を押し上げやすくする作用を有する。Even with such a configuration, most of the exhaust air flow of the stagnant air is made easier to pass by the notch 41 and is exhausted to the upper opening 24 through the bypass passage.
Apart from passing through the air amount adjusting hole 38, a part of the exhaust flow passing between the notch 41 and the inner wall acts on the valve element 31 of the air valve 32 with a float, but passes through the bypass passage. Since the amount is smaller than the exhaust flow, the above-described adsorption phenomenon of the valve body does not occur, and the retained air is discharged to the outside without any trouble. As described above, the gap between the adjustment plate 36 formed by the projections 43 and 43 'and the lower surface of the float 30 is formed by the water flow passing through the air amount adjustment hole 38.
2 has the effect of making it easier to push up.
【００３９】フロート付き空気弁３２の弁体３１に設け
た空気弁口３３の作用は前述と同様である。The operation of the air valve port 33 provided in the valve element 31 of the air valve with float 32 is the same as described above.
【００４０】前記の切欠き４１を設けずに調整板３６を
前記の突出部４２により係合し、調整板３６の外周部と
空気弁室１４の内側壁との間に空隙を形成して前記バイ
パス路を形成してもよい。The adjusting plate 36 is engaged with the projection 42 without providing the notch 41, and a gap is formed between the outer peripheral portion of the adjusting plate 36 and the inner wall of the air valve chamber 14. A bypass may be formed.
【００４１】なお、図６に示すように、調整板３６の外
縁部に設けた切欠き４１の内側に前記側壁３５を設けて
もよい。As shown in FIG. 6, the side wall 35 may be provided inside a notch 41 provided at the outer edge of the adjusting plate 36.
【００４２】また、前述のいずれの調整板３６にも必要
に応じ、複数個の空気量調整穴３８を設けてもよい。Further, any of the above-mentioned adjusting plates 36 may be provided with a plurality of air amount adjusting holes 38 as required.
【００４３】[0043]
【発明の効果】以上のように、この発明では、水の流入
口を開閉する主弁体にフロート付き空気弁を収容する空
気弁室を設け、その下部開口に空気量調整穴を有する調
整板を固定して、その調整板と調整板受け部との間に空
隙を形成し、調整板の外縁部に切欠き又は通気穴を有す
る側壁を設けるなどして空気弁室の下部開口から上部開
口に連通したバイパス路を形成したので、空気弁室に入
った配管内の滞留空気の排気流の大部分が、前記バイパ
ス路を通過することによりフロート付き空気弁に直接に
は作用しないため、前述の弁体の吸着現象を生じること
なく、配管内の多量の滞留空気を急速にしかも残存する
ことなく外部へ排出することが可能となった。As described above, according to the present invention, an air valve chamber for accommodating an air valve with a float is provided in a main valve body for opening and closing the water inlet, and an adjusting plate having an air amount adjusting hole in a lower opening thereof. Is fixed, a gap is formed between the adjustment plate and the adjustment plate receiving portion, and a notch or a side wall having a ventilation hole is provided at an outer edge portion of the adjustment plate to form a lower opening to an upper opening of the air valve chamber. Since the bypass passage communicating with the air valve chamber is formed, most of the exhaust flow of the staying air in the pipe entering the air valve chamber does not directly act on the air valve with the float by passing through the bypass passage. Thus, a large amount of air remaining in the piping can be discharged to the outside quickly and without remaining without causing the adsorption phenomenon of the valve element.
【図１】この発明の消火栓の一例を示す縦断面図FIG. 1 is a longitudinal sectional view showing an example of a fire hydrant of the present invention.
【図２】同上の調整板の横断平面図FIG. 2 is a cross-sectional plan view of the adjustment plate according to the first embodiment.
【図３】同上の調整板の斜視図FIG. 3 is a perspective view of the adjusting plate according to the first embodiment;
【図４】同上の空気弁室の横断平面図FIG. 4 is a cross-sectional plan view of the air valve chamber.
【図５】（ａ）他の実施形態を示す空気弁室部分の断面
図 （ｂ）同上の調整板の平面図FIG. 5A is a sectional view of an air valve chamber showing another embodiment. FIG.
【図６】他の実施形態の空気弁室の部分断面図FIG. 6 is a partial sectional view of an air valve chamber according to another embodiment.
１ 消火栓 ２ 弁箱 ３ 流入口 ４ フランジ ５ 弁座 ６ 流出口 ７ 接続管 ８ 口金座 ９ 押し輪 １０ 口金 １１ 口金蓋 １２ 主弁体 １３ 下部開口 １４ 空気弁室 １５ 調整板受け部 １６ ガスケット １７ ねじ筒 １８ スピンドル １９ フランジ ２０ 弁蓋 ２１ ナット ２２ ワッシャ ２３ 弁座 ２４ 上部開口 ２５ 円筒部 ２６ 連通穴 ２７ ボス部 ２８ シールパッキン ２９ パッキン押え ３０ フロート ３１ 弁体 ３２ フロート付き空気弁 ３３ 空気弁口 ３４ 底板 ３５ 側壁 ３６ 調整板 ３７ 突起 ３８ 空気量調整穴 ３９、３９’ 突起 ４０ 通気穴 ４１ 切欠き ４２ 突出部 ４３、４３’ 突起 ４４ キャップ DESCRIPTION OF SYMBOLS 1 Fire hydrant 2 Valve box 3 Inlet 4 Flange 5 Valve seat 6 Outlet 7 Connection pipe 8 Cap base 9 Push ring 10 Cap 11 Cap 11 Cap 12 Main valve body 13 Lower opening 14 Air valve chamber 15 Adjustment plate receiving part 16 Gasket 17 Screw Cylinder 18 Spindle 19 Flange 20 Valve lid 21 Nut 22 Washer 23 Valve seat 24 Upper opening 25 Cylindrical part 26 Communication hole 27 Boss 28 Seal packing 29 Packing presser 30 Float 31 Valve 32 Air valve with float 33 Air valve port 34 Bottom plate 35 Side wall 36 Adjusting plate 37 Projection 38 Air volume adjustment hole 39, 39 'Projection 40 Vent hole 41 Notch 42 Projection 43, 43' Projection 44 Cap
Claims (5)
流入口を開閉する主弁体と、前記主弁体の開放により前
記流入口から流入した水を流出させる流出口とを有し、
前記主弁体は前記流入口の弁座の内側に開放された下部
開口と、その下部開口に連通した空気弁室、その空気弁
室の上部に開放され、かつ、大気に連通した上部開口と
を有し、前記空気弁室に収容されたフロート付き空気弁
により前記上部開口を開閉するようにした空気弁付き消
火栓において、上記空気弁室の下部開口に調整板を固定
し、前記調整板に前記空気弁に対向した空気量調整穴を
設け、前記調整板の周囲に前記空気弁室の下部開口から
上部開口に連通したバイパス路を形成したことを特徴と
する空気弁付き消火栓。An inlet for opening and closing the water inlet, an outlet for opening and closing the inlet, and an outlet for discharging water flowing from the inlet by opening the main valve. And
The main valve body has a lower opening that is opened inside a valve seat of the inflow port, an air valve chamber that communicates with the lower opening, an upper opening that is open at an upper part of the air valve chamber, and that communicates with the atmosphere. In a fire hydrant with an air valve, wherein the upper opening is opened and closed by an air valve with a float accommodated in the air valve chamber, an adjusting plate is fixed to a lower opening of the air valve chamber, and the adjusting plate is A fire hydrant with an air valve, characterized in that an air amount adjustment hole facing the air valve is provided, and a bypass is formed around the adjustment plate from a lower opening to an upper opening of the air valve chamber.
調整板を前記空気弁室の内側壁に係合し、前記調整板の
外周部と前記内側壁との間に空隙を形成し、前記調整板
の下面と前記空気弁室下部の調整板受け部との間に前記
下部開口から内部に通じる空隙を形成し、前記の二つの
空隙を通じて前記下部開口と上部開口とを連通させて前
記バイパス路を形成したことを特徴とする請求項１に記
載の空気弁付き消火栓。2. The adjusting plate is formed by a disk, the adjusting plate is engaged with an inner wall of the air valve chamber, and a gap is formed between an outer peripheral portion of the adjusting plate and the inner wall. A gap is formed between the lower surface of the adjustment plate and the adjustment plate receiving portion at the lower part of the air valve chamber so as to communicate with the inside from the lower opening, and the lower opening and the upper opening communicate with each other through the two gaps. The fire hydrant with an air valve according to claim 1, wherein a bypass passage is formed.
記調整板の外縁部と前記内側壁との間に形成した前記切
欠きを含む空隙と前記調整板の下面と前記空気弁室下部
の調整板受け部との間に形成した空隙とを通じて前記空
気弁室の下部開口と上部開口とを連通させて前記のバイ
パス路を形成したことを特徴とする請求項１又は２に記
載の空気弁付き消火栓。3. A notch is provided at an outer edge of the adjusting plate, a gap including the notch formed between the outer edge of the adjusting plate and the inner wall, a lower surface of the adjusting plate, and the air valve chamber. 3. The bypass passage according to claim 1, wherein the lower opening and the upper opening of the air valve chamber communicate with each other through a gap formed between the lower adjustment plate receiving portion and the lower adjustment plate receiving portion to form the bypass passage. 4. Fire hydrant with air valve.
壁を設け、前記側壁を前記フロート付き空気弁の外周壁
と前記空気弁室の内側壁とで形成される空間内に挿入し
て前記内側壁上部に押し当てることにより前記調整板を
固定し、前記通気穴を通じて前記バイパス路を形成した
ことを特徴とする請求項１に記載の空気弁付き消火栓。4. A side wall having a ventilation hole is provided on an outer peripheral portion of the adjusting plate, and the side wall is inserted into a space formed by an outer peripheral wall of the floated air valve and an inner side wall of the air valve chamber. The fire hydrant with an air valve according to claim 1, wherein the adjustment plate is fixed by being pressed against the upper portion of the inner wall, and the bypass passage is formed through the ventilation hole.
側に側壁を設け、前記側壁を前記フロート付き空気弁の
外周壁と前記空気弁室の内側壁とで形成される空間内に
挿入し、前記切欠きを含む空隙及び前記空気弁室下部に
形成した空隙と前記内側壁上部の空間とを通じて前記バ
イパス路を形成したことを特徴とする請求項３に記載の
空気弁付き消火栓。5. A side wall is provided inside a notch provided at an outer edge of the adjusting plate, and the side wall is provided in a space formed by an outer peripheral wall of the air valve with a float and an inner side wall of the air valve chamber. 4. The fire hydrant with an air valve according to claim 3, wherein the bypass passage is formed through the space including the notch, the space formed in the lower part of the air valve chamber, and the space in the upper part of the inner wall. 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000006788A JP3570945B2 (en) | 2000-01-14 | 2000-01-14 | Fire hydrant with air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000006788A JP3570945B2 (en) | 2000-01-14 | 2000-01-14 | Fire hydrant with air valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001193108A true JP2001193108A (en) | 2001-07-17 |
| JP3570945B2 JP3570945B2 (en) | 2004-09-29 |
Family
ID=18535262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000006788A Expired - Fee Related JP3570945B2 (en) | 2000-01-14 | 2000-01-14 | Fire hydrant with air valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3570945B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002276836A (en) * | 2001-03-16 | 2002-09-25 | Nippon Suiki Kk | Fire hydrant equipped with rapid air valve |
| GB2420167A (en) * | 2004-11-10 | 2006-05-17 | Kevin James Smith | Water mains vent |
| KR100797454B1 (en) | 2006-11-02 | 2008-01-24 | 주식회사 삼진정밀 | Waste-water of many function with air-bent |
| JP2008223368A (en) * | 2007-03-14 | 2008-09-25 | Shimizu Gokin Seisakusho:Kk | Underground fire hydrant |
| JP2010137140A (en) * | 2008-12-10 | 2010-06-24 | Kurimoto Ltd | Vertical mill |
| JP2015155749A (en) * | 2014-01-20 | 2015-08-27 | 株式会社清水合金製作所 | Flow rate control structure of air valve and repair valve |
-
2000
- 2000-01-14 JP JP2000006788A patent/JP3570945B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002276836A (en) * | 2001-03-16 | 2002-09-25 | Nippon Suiki Kk | Fire hydrant equipped with rapid air valve |
| JP4533550B2 (en) * | 2001-03-16 | 2010-09-01 | 山本 政和 | Fire hydrant with quick air valve |
| GB2420167A (en) * | 2004-11-10 | 2006-05-17 | Kevin James Smith | Water mains vent |
| GB2420167B (en) * | 2004-11-10 | 2009-01-14 | Kevin James Smith | Water mains vent |
| KR100797454B1 (en) | 2006-11-02 | 2008-01-24 | 주식회사 삼진정밀 | Waste-water of many function with air-bent |
| JP2008223368A (en) * | 2007-03-14 | 2008-09-25 | Shimizu Gokin Seisakusho:Kk | Underground fire hydrant |
| JP2010137140A (en) * | 2008-12-10 | 2010-06-24 | Kurimoto Ltd | Vertical mill |
| JP2015155749A (en) * | 2014-01-20 | 2015-08-27 | 株式会社清水合金製作所 | Flow rate control structure of air valve and repair valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3570945B2 (en) | 2004-09-29 |
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