JPH1061800A - Drainage type check valve - Google Patents
Drainage type check valveInfo
- Publication number
- JPH1061800A JPH1061800A JP21445396A JP21445396A JPH1061800A JP H1061800 A JPH1061800 A JP H1061800A JP 21445396 A JP21445396 A JP 21445396A JP 21445396 A JP21445396 A JP 21445396A JP H1061800 A JPH1061800 A JP H1061800A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- drain
- cylinder
- valve seat
- drain valve
- 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.)
- Withdrawn
Links
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- Fluid-Driven Valves (AREA)
- Check Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主に寒冷地で使用
される排水式逆止弁に関し、特に同一出願人による実願
昭６３ー１４３９１号の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain check valve mainly used in cold regions, and more particularly to an improvement of Japanese Utility Model Application No. 63-14391 by the same applicant.
【０００２】[0002]
【従来の技術】従来、寒冷地用の逆止弁は排水時に逆流
防止機能の解除が必要なため、それを不必要とした逆止
弁が望まれており、そのために提案されたのが上記引用
例のものであり、逆止弁解除のための操作を必要とせ
ず、逆止弁以降の管内の水または湯を水抜装置側に排出
しないという特徴を有していた。2. Description of the Related Art Conventionally, a check valve for cold districts needs to release a check for preventing backflow at the time of drainage. Therefore, a check valve which does not require such a check has been desired. This is a cited example, which does not require an operation for releasing the check valve, and has a feature that water or hot water in the pipe after the check valve is not discharged to the draining device side.
【０００３】[0003]
【発明が解決しようとする課題】しかし上述のものにお
いては、逆止弁以降の配管の縦長さ（ヘッド）が大きい
とき、排水弁に作用する閉方向の水圧力（ヘッド圧）も
それだけ大きくなり、排水時に一定のヘッド圧になるま
で排水弁が浮上せず、逆流を許してしまう、という問題
があり、そのため、ヘッドを制限しなければならず、実
際の使用時にあっては、非常に不便なものになってい
た。この事は、通常の逆止弁に比してより安全性が高い
として寒冷地以外で使用される排水式逆止弁にも言える
ことであり、いずれにしても、早期な解決が望まれてい
た。However, in the above-mentioned structure, when the vertical length (head) of the piping after the check valve is large, the water pressure (head pressure) acting on the drain valve in the closing direction also increases accordingly. However, there is a problem that the drain valve does not float until a certain head pressure is reached when draining, and backflow is permitted. Therefore, the head must be restricted, which is very inconvenient during actual use. Had become something. This is true for drainage check valves that are used outside of cold regions because they are safer than normal check valves, and in any case, an early solution is desired. Was.
【０００４】[0004]
【課題を解決するための手段】本発明は上記課題を解決
するために提案されたものであり、逆止弁座とバイパス
路へ水の流れ出るバイパス口間にシリンダを介在させ、
バイパス口の近傍にもうける排水弁座を上記シリンダよ
り小径に形成し、上記排水弁座を閉塞する排水弁と、排
水時には上記シリンダに嵌合して、シリンダと排水弁座
の径差に基づく移動力を排水弁に与える補助弁を弁箱内
に収容し、上記排水弁、補助弁のいずれかに、上記逆止
弁座を閉塞する逆止パッキンを装着してなるものであ
り、そのためヘッドに関係なく、初期の目的を達成でき
るようにしたものである。SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and has a cylinder interposed between a check valve seat and a bypass port through which water flows to a bypass passage.
A drain valve seat formed in the vicinity of the bypass port is formed to have a smaller diameter than the cylinder, and a drain valve for closing the drain valve seat is fitted to the cylinder at the time of drainage to move based on a diameter difference between the cylinder and the drain valve seat. An auxiliary valve that applies force to the drain valve is housed in a valve box, and one of the drain valve and the auxiliary valve is provided with a check packing that closes the check valve seat. Regardless, it is intended to achieve its initial purpose.
【０００５】[0005]
【発明の実施の形態】図１、図２には寒冷地の設置例の
ほとんどを占める垂直配管に即した実施例を示している
が、水平配管にも兼用させたいときは、引用例のように
流入口、流出口に対してほぼ４５度の角度に弁を位置さ
せればよい。補助弁は通水時にはシリンダから離脱して
流路を確保しているが、排水時や負圧発生時にはばね、
浮力あるいは水の流れにより移動してシリンダに嵌合
し、流出側配管内の大部分の水の流入側への逆流を防止
することにより、排水弁座との面積差を利用して係止し
た排水弁を移動させ、流出側配管内の水を排水口から排
出するようにしている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment according to a vertical pipe which occupies most of the installation examples in a cold region. The valve may be positioned at an angle of approximately 45 degrees with respect to the inlet and outlet. The auxiliary valve separates from the cylinder during water flow to secure a flow path, but when draining or negative pressure is generated, a spring,
Moved by buoyancy or water flow and fitted to the cylinder to prevent most of the water in the outflow side piping from flowing back to the inflow side and locked using the area difference with the drain valve seat. The drain valve is moved so that the water in the outlet pipe is discharged from the drain port.
【０００６】図１のように、Ｏリングを排水弁座として
も良く、また逆に排水弁にパッキンを装着しても良い。
図３のように排水弁座をシリンダ状にすることもでき
る。流入口の上流側に不凍給水栓等の水抜き装置が設置
される場合は、流入口と逆止弁座間に吸気弁をもうけて
流入口側配管内の水がスムーズに水抜き装置から排出で
きるようにしているが、寒冷地以外の上流側に水抜き装
置がない場合には、吸気弁をもうけないのが普通であ
る。As shown in FIG. 1, an O-ring may be used as a drain valve seat, and conversely, a packing may be attached to the drain valve.
As shown in FIG. 3, the drain valve seat can be made cylindrical. If a drainage device such as an antifreeze water tap is installed upstream of the inlet, an intake valve is provided between the inlet and the check valve seat to allow the water in the inlet-side piping to drain smoothly from the drainer. Although it is possible to do so, if there is no drainage device on the upstream side other than the cold region, it is normal to not provide an intake valve.
【０００７】排水終了後は補助弁はシリンダから離脱し
ていないと、凍結により再通水時、水が出ない事態が生
じるので、自重あるいは自重が望めない場合はばねの力
によりシリンダから完全に離脱、あるいは少なくとも主
たる通水路は離脱させておく必要がある。逆止弁の上流
側に不凍給水栓等の排水装置をもうけず、逆止弁自体は
凍結しない雰囲気に設置される場合は勿論その必要はな
い。After draining, if the auxiliary valve is not separated from the cylinder, water will not come out when re-flowing due to freezing. If the self-weight or self-weight cannot be expected, the auxiliary valve will be completely removed from the cylinder by the force of the spring. Separation, or at least the main channel, needs to be separated. Of course, when a drainage device such as an antifreeze water faucet is not provided upstream of the check valve, and the check valve itself is installed in an atmosphere that does not freeze, it is not necessary.
【０００８】排水弁は常態においては排水弁座に密着し
たままなので、経年変化により固着して排水しない恐れ
が生じるため、排水弁か排水弁座のいずれかを４フッ化
エチレン樹脂（以下テフロンと呼称する）を使用し、そ
の優れた非粘着性を利用して固着防止を図ることが望ま
しいが、必ずしもそれに拘るものではない。[0008] Since the drain valve is normally in close contact with the drain valve seat, there is a risk that the drain valve will stick due to aging and will not drain. Therefore, either the drain valve or the drain valve seat is made of tetrafluoroethylene resin (hereinafter referred to as Teflon). It is desirable to use the excellent non-adhesiveness to prevent sticking, but this is not necessarily the case.
【０００９】[0009]
【実施例】実施例について図面を参照して説明すると、
図１において、１は弁箱であり、流入口２、流出口３を
同一軸心上にもうけ、流れの上流側から下流側に向かっ
て下向きの逆止弁座４、シリンダ５、バイパス口６、バ
イパス路７をそれぞれもうけている。バイパス口６の下
方にシリンダ５と同径のガイドシリンダ８をもうけ、さ
らにその下方に排水プラグ９を接続する。排水プラグ９
は下端に排水口１０をもうけ、上端にＯリングを装着し
て排水弁座１１を形成する。Embodiments will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a valve box, which has an inflow port 2 and an outflow port 3 on the same axis, and a check valve seat 4, a cylinder 5, and a bypass port 6 which are directed downward from the upstream side to the downstream side of the flow. , Bypass paths 7 are provided. A guide cylinder 8 having the same diameter as the cylinder 5 is provided below the bypass port 6, and a drain plug 9 is further connected below the guide cylinder 8. Drain plug 9
Has a drain port 10 at the lower end and an O-ring at the upper end to form a drain valve seat 11.
【００１０】１２はポリエチレン、ポリプロピレン等の
比重が１より小さい樹脂で形成された補助弁であり、上
端に逆止弁座４に密着する逆止パッキン１３を装着し、
逆止作用も行わせるようにしている。内部に、上端が閉
じられた収容室１４を穿ち、側方に横穴１５と下端に段
部１６をもうけている。Reference numeral 12 denotes an auxiliary valve formed of a resin having a specific gravity of less than 1, such as polyethylene or polypropylene.
The check action is also performed. Inside, a storage chamber 14 having a closed upper end is bored, and a lateral hole 15 is formed laterally and a step 16 is formed at the lower end.
【００１１】１７はテフロン製の排水弁であり、上端に
突起部１８、割り部１９をもうけ、その部分ですぼめる
ようにして収容室１４に離脱しないよう連結する。下端
にガイド部２０をもうけ、ガイド部２０の先端を円錐状
のばね２１が上向きに押圧するようにしている。なお、
２２は上方４５度方向に設置された吸気弁である。Reference numeral 17 denotes a drain valve made of Teflon, which is provided with a projection 18 and a split portion 19 at the upper end, and is connected to the accommodation chamber 14 so as not to be separated from the accommodation chamber 14 by being narrowed at the projection. A guide portion 20 is provided at the lower end, and a conical spring 21 presses the tip of the guide portion 20 upward. In addition,
Reference numeral 22 denotes an intake valve installed in the upper 45-degree direction.
【００１２】図は配管末端の蛇口を閉じて水を流してい
ない状態、すなわち停水状態をを示しているが、蛇口を
開いたときは流入口１からの水は逆止弁座４を通って補
助弁１１を押し下げ、バイパス口６、バイパス路７を通
って流出口３から下流側配管内へと流れ出る。この時に
は水圧力により、排水弁１７がばね２１の押圧力に打ち
勝って排水弁座１１に密着しており、排水口１０からの
漏水はない。The figure shows a state in which the faucet at the end of the pipe is closed and water is not flowing, that is, a water stop state. When the faucet is opened, water from the inflow port 1 passes through the check valve seat 4. The auxiliary valve 11 is pushed down, and flows out from the outflow port 3 into the downstream pipe through the bypass port 6 and the bypass path 7. At this time, due to the water pressure, the drain valve 17 overcomes the pressing force of the spring 21 and is in close contact with the drain valve seat 11, so that there is no leakage from the drain port 10.
【００１３】この状態で不凍給水栓を操作して水を抜い
たときには、補助弁１２は浮力及び水の流れにより直ち
に上昇してシリンダ５に嵌合し、図１の状態になる。こ
の時、流出口３側の水の逆止弁座４側への流れは大部分
遮断され、しかもシリンダ５は排水弁座１１より大径を
有しているため、その面積差に二次側配管のヘッド圧を
乗じた力を受けて補助弁１２および段部１６に突起部１
８が係止された排水弁１７も共に上昇し、逆止パッキン
１３が逆止弁座４に密着して流出側配管内の水が流入口
１側に逆流するのを防止するとともに、流出側配管内の
水は排水口１０から排出されることになる。なお、補助
弁１２の上昇中、ガイドシリンダ８から離脱する前に、
シリンダ５に嵌合するため、補助弁１２は軸心に沿って
スムーズに上昇できることになる。When water is drained by operating the antifreeze water tap in this state, the auxiliary valve 12 immediately rises due to the buoyancy and the flow of water, and is fitted into the cylinder 5 to be in the state shown in FIG. At this time, the flow of the water on the side of the outlet 3 to the check valve seat 4 is largely blocked, and the cylinder 5 has a larger diameter than the drain valve seat 11, so that the difference in the area between the outlet 5 and the secondary The auxiliary valve 12 and the step 16 receive the protrusion 1 by receiving the force multiplied by the head pressure of the pipe.
The drain valve 17 with the lock 8 is also raised, and the check packing 13 is in close contact with the check valve seat 4 to prevent the water in the outlet pipe from flowing back to the inlet 1 side, The water in the pipe is discharged from the drain 10. In addition, before the auxiliary valve 12 is lifted from the guide cylinder 8 while being lifted,
Since the auxiliary valve 12 is fitted to the cylinder 5, the auxiliary valve 12 can smoothly rise along the axis.
【００１４】すなわち、排水弁１７に作用する下向きの
水圧力より補助弁１２に作用する上向きの水圧力の方が
大きいため、引用例のもののように、ヘッドが高くなっ
た場合は一定の水位に低下するまで排水口１０から排出
せず流入口側に逆流してしまうという事故は生じない。
水位がさらに低下して補助弁１２が浮力で上昇を維持で
きなくなったときには自重で排水プラグ９に当接するま
で落下するが、ばね２１により排水弁１７は排水弁座１
１に密着せず、水は横穴１５から補助弁１２と排水弁１
７の間隙を通って全て排水口１０から排出されることに
なる。That is, since the upward water pressure acting on the auxiliary valve 12 is larger than the downward water pressure acting on the drain valve 17, when the head becomes high as in the cited example, the water level becomes constant. There is no occurrence of an accident that the water is not discharged from the drain port 10 until it lowers and flows backward to the inlet side.
When the water level further decreases and the auxiliary valve 12 cannot maintain the rise due to buoyancy, the auxiliary valve 12 falls by its own weight until it comes into contact with the drain plug 9.
1 does not adhere to the water, water flows from the side hole 15 through the auxiliary valve 12
7 are all discharged from the drain port 10 through the gap 7.
【００１５】排水終了後、補助弁１２は完全にシリンダ
５から離脱しているため、再通水時、凍結により通路が
閉塞して水が流れないという事故は生じない。なお、流
入口側配管内の水は、吸気弁２２から吸気しながら不凍
給水栓の排水口から地中に排出される。After draining, the auxiliary valve 12 is completely separated from the cylinder 5. Therefore, when water is re-flowed, there is no accident that the passage is closed due to freezing and water does not flow. In addition, the water in the inflow-side pipe is discharged into the ground from the drain port of the antifreeze faucet while sucking in air from the intake valve 22.
【００１６】以上は不凍給水栓を操作して水抜きをした
場合を説明したが、通水中に本管等の断水により流入口
側に負圧が発生した時も、全く同様に流出側配管内の水
の逆流は防止され、排水口１０から排出されることにな
る。The above description has been made on the case where the antifreeze water tap is operated to drain the water. However, even when a negative pressure is generated at the inlet side due to the interruption of the main pipe or the like during the passage of water, the outflow side piping is similarly operated. The backflow of the water inside is prevented, and the water is discharged from the drain port 10.
【００１７】図２に本発明の他の実施例を示している
が、本図においては、補助弁１２に逆止パッキン１３を
取り付ける代わりに排水弁１７の上端部にもうけてお
り、下端部にはＯリング２３を装着し、排水プラグ９に
より固定されたテフロン製の排水弁座１１に着座させる
ようにしている。ガイド部２０に横穴１５、縦穴２４穿
っており、ガイド部２０を充分長くしてしっかり案内さ
せるようにしているため、補助弁１２が上下動する際の
図１に於けるガイドシリンダ８を省略して、排水弁１７
をガイドとして上下動するようにしている。補助弁１２
を１より比重の小さい樹脂で形成し、ばね２１で排水弁
１７を上向きに押圧する点では図１のものと同様であ
る。FIG. 2 shows another embodiment of the present invention. In this figure, the check valve 13 is provided at the upper end of the drain valve 17 instead of attaching the check packing 13 to the auxiliary valve 12, and the lower end is provided at the lower end. Is fitted with an O-ring 23 and is seated on a drain valve seat 11 made of Teflon fixed by a drain plug 9. Since the guide portion 20 is provided with a horizontal hole 15 and a vertical hole 24, and the guide portion 20 is made sufficiently long so as to be guided firmly, the guide cylinder 8 in FIG. 1 when the auxiliary valve 12 moves up and down is omitted. And drain valve 17
It moves up and down as a guide. Auxiliary valve 12
1 is formed of a resin having a specific gravity smaller than 1, and the drain valve 17 is pressed upward by a spring 21 as in FIG.
【００１８】排水プラグ９の下端部に、排水口１０を中
心に穿設する止水弁２５をもうけ、上端部に止水Ｏリン
グ２６を装着し、万一、排水弁１７から漏水が生じたよ
うな場合に止水できるようにしている。２７はストッパ
ーＯリングであり、止水弁２５をねじ込んだ後で装着す
るようにしている。At the lower end of the drain plug 9, a water stop valve 25 is provided to be drilled around the drain port 10, and at the upper end, a water stop O-ring 26 is attached. In such a case, water is stopped. Reference numeral 27 denotes a stopper O-ring, which is mounted after the water stop valve 25 is screwed.
【００１９】図は排水終了後の状態を示しており、ばね
２１に押圧されて排水弁１７は排水弁座１１から離脱し
ているが、補助弁１２は浮力を受けないため、自重で排
水弁座１１に着座している。停水時には、排水弁１７に
もうけた突起部１８に補助弁１２の上端が当接した状態
で、図１のように補助弁１２をシリンダ５に嵌合させて
いる。The figure shows a state after the drainage is completed. The drainage valve 17 is separated from the drainage valve seat 11 by being pressed by the spring 21, but the auxiliary valve 12 does not receive buoyancy. She is sitting on seat 11. When the water stops, the auxiliary valve 12 is fitted to the cylinder 5 with the upper end of the auxiliary valve 12 in contact with the projection 18 formed on the drain valve 17 as shown in FIG.
【００２０】図３は、逆止弁を凍結しない箇所に設置す
る場合の本発明の１実施例であり、流入口２、流入口部
分にねじ接続された逆止弁座体２８端部のテーパー状の
逆止弁座４、シリンダ５、シリンダ５より小径のシリン
ダ状排水弁座１１、流出口３を同一軸心上にもうけてい
るので、損失抵抗をその分少なくすることができる。な
お、バイパス路７は紙面と直角方向に２箇所もうけても
良く、一層損失抵抗を減少させ得る。FIG. 3 shows an embodiment of the present invention in which the check valve is installed at a place where it does not freeze. The inlet 2 and the taper at the end of the check valve seat 28 screwed to the inlet are screwed. Since the check valve seat 4, the cylinder 5, and the cylindrical drain valve seat 11 and the outlet 3 having a smaller diameter than the cylinder 5 are provided on the same axis, the loss resistance can be reduced accordingly. It should be noted that two bypass paths 7 may be provided in the direction perpendicular to the plane of the paper, so that the loss resistance can be further reduced.
【００２１】補助弁１２にはＯリング状の逆止パッキン
１３を装着し、その下流側に数カ所の案内羽根２９をも
うけ、シリンダ５から離脱しないようにしている。ばね
２１を介して突起部１８により補助弁１２に係止された
排水弁１７には排水弁座１１を閉塞する一方向密封性の
Ｙパッキン３０を装着し、摺動抵抗をできるだけ小さく
するようにしている。An O-ring check packing 13 is mounted on the auxiliary valve 12, and several guide blades 29 are provided downstream thereof so as not to be separated from the cylinder 5. A one-way sealing Y packing 30 for closing the drain valve seat 11 is attached to the drain valve 17 locked to the auxiliary valve 12 by the projection 18 via the spring 21 so as to minimize sliding resistance. ing.
【００２２】図は負圧発生時の状態を示しているが、逆
止パッキン１３が逆止弁座４に当接して逆流を防止し、
排水弁１７が排水弁座１１から離脱して、流出側配管内
の水は排水口１０から排出される。通水状態で負圧が発
生したときは、ばね２１に押圧されて案内羽根２９下流
の円筒部分がシリンダ５に嵌合し、シリンダ５と逆止弁
座１１の面積差により、排水弁１７を排水弁座１１から
離脱させるようにしているが、ばね２１を省略して、水
の流れにより補助弁１２を移動させるようにすることも
でき、特に、垂直配管に使用される場合は、自重で落下
するのでばね２１を省略しても良い。The figure shows the state when a negative pressure is generated. The check packing 13 contacts the check valve seat 4 to prevent back flow,
The drain valve 17 is separated from the drain valve seat 11, and the water in the outflow-side pipe is discharged from the drain port 10. When a negative pressure is generated in the water-flowing state, the cylindrical portion downstream of the guide vanes 29 is fitted into the cylinder 5 by being pressed by the spring 21, and the drain valve 17 is moved by the area difference between the cylinder 5 and the check valve seat 11. Although it is made to separate from the drain valve seat 11, the spring 21 can be omitted and the auxiliary valve 12 can be moved by the flow of water. Since it falls, the spring 21 may be omitted.
【００２３】図３の実施例を、図１、図２の実施例と同
様、凍結雰囲気中に設置する場合は、ばね２１を省略し
て、そのかわり逆止弁座体２８と補助弁１２間に圧縮ば
ねを装着し、排水終了後、そのばねにより補助弁１２を
下流側に移動させる様にすればよい。When the embodiment of FIG. 3 is installed in a freezing atmosphere, similarly to the embodiments of FIGS. 1 and 2, the spring 21 is omitted, and instead, the check valve seat body 28 and the auxiliary valve 12 are connected. The auxiliary valve 12 may be moved downstream by the spring after the drainage is completed.
【００２４】[0024]
【発明の効果】上述したように本発明においては、逆止
弁以降の配管のヘッドが大きくなった場合に、その水が
排水口から排出せず、本管側に逆流してしまうという事
故を未然に防止できる排水式逆止弁を提供できるもので
あり、流出側配管内の水は逆止弁から排出されるので、
通常の逆止弁に比して、本管への汚水混入という点に関
してはより安全であり、逆止弁下流側配管の高所に設置
されるバキュームブレーカーと組み合わせて使用すれ
ば、一層その効果が期待できるものである。As described above, in the present invention, when the size of the piping head after the check valve becomes large, the water is not discharged from the drain port but flows backward to the main pipe side. It is possible to provide a drain check valve that can be prevented beforehand, and the water in the outflow pipe is discharged from the check valve.
Compared to a normal check valve, it is safer to mix sewage into the main pipe.If combined with a vacuum breaker installed at a high location on the pipe downstream of the check valve, the effect will be even greater. Can be expected.
【図１】本発明の１実施例を示す、停水状態に於ける縦
断面図である。FIG. 1 is a longitudinal sectional view showing a water stop state according to an embodiment of the present invention.
【図２】本発明の他の実施例を示す、排水終了状態にお
ける要部縦断面図である。FIG. 2 is a vertical sectional view of a main part of another embodiment of the present invention in a state where drainage is completed.
【図３】本発明のもう一つの実施例を示す、負圧発生時
に於ける縦断面図である。FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention when a negative pressure is generated.
１ 弁箱 ２ 流入口 ３ 流出口 ４ 逆止弁座 ５ シリンダ ６ バイパス口 ７ バイパス路 １０ 排水口 １１ 排水弁座 １２ 補助弁 １３ 逆止パッキン １７ 排水弁 ２１ ばね ２２ 吸気弁 DESCRIPTION OF SYMBOLS 1 Valve box 2 Inlet 3 Outlet 4 Check valve seat 5 Cylinder 6 Bypass port 7 Bypass path 10 Drain port 11 Drain valve seat 12 Auxiliary valve 13 Check packing 17 Drain valve 21 Spring 22 Intake valve
Claims (1)
流入口、逆止弁座、シリンダ、バイパス口、バイパス
路、流出口をもうけるとともに、上記バイパス口近傍に
上記シリンダより小径の排水弁座をもうける弁箱内に、
上記排水弁座を密封する排水弁と、排水時には上記シリ
ンダに嵌合してシリンダと排水弁座の径差に基づく開方
向の移動力を排水弁に与える補助弁を収容し、上記排水
弁、補助弁のいずれかに、上記逆止弁座を閉塞する逆止
パッキンを装着してなる排水式逆止弁。(1) From the upstream side of the flow to the downstream side,
In the valve box, which has an inlet, a check valve seat, a cylinder, a bypass port, a bypass passage, and an outlet, and a drain valve seat smaller in diameter than the cylinder near the bypass port,
A drain valve that seals the drain valve seat, and an auxiliary valve that fits into the cylinder during drainage and provides the drain valve with an opening-direction moving force based on a diameter difference between the cylinder and the drain valve seat; A drainage check valve in which a check packing for closing the check valve seat is mounted on one of the auxiliary valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21445396A JPH1061800A (en) | 1996-08-14 | 1996-08-14 | Drainage type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21445396A JPH1061800A (en) | 1996-08-14 | 1996-08-14 | Drainage type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1061800A true JPH1061800A (en) | 1998-03-06 |
Family
ID=16656013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21445396A Withdrawn JPH1061800A (en) | 1996-08-14 | 1996-08-14 | Drainage type check valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1061800A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002310306A (en) * | 2001-04-13 | 2002-10-23 | Hikari Gokin Seisakusho:Kk | Blow-out preventing mechanism for o-ring |
| GB2453126A (en) * | 2007-09-26 | 2009-04-01 | Intelligent Energy Ltd | Fuel Cell System |
| KR20100007267U (en) * | 2009-01-07 | 2010-07-15 | 오동준 | angle valve |
| JP2011196499A (en) * | 2010-03-23 | 2011-10-06 | Mirai Ind Co Ltd | Drain vent valve |
| JP2014238001A (en) * | 2014-07-17 | 2014-12-18 | 株式会社東京エネシス | Floor drain funnel |
| CN108006304A (en) * | 2017-12-28 | 2018-05-08 | 温州大阳科技有限公司 | A kind of integration module washes film solenoid valve |
-
1996
- 1996-08-14 JP JP21445396A patent/JPH1061800A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002310306A (en) * | 2001-04-13 | 2002-10-23 | Hikari Gokin Seisakusho:Kk | Blow-out preventing mechanism for o-ring |
| JP4581138B2 (en) * | 2001-04-13 | 2010-11-17 | 株式会社光合金製作所 | O-ring blowout prevention mechanism |
| GB2453126A (en) * | 2007-09-26 | 2009-04-01 | Intelligent Energy Ltd | Fuel Cell System |
| GB2453126B (en) * | 2007-09-26 | 2013-02-06 | Intelligent Energy Ltd | Fuel cell system |
| KR20100007267U (en) * | 2009-01-07 | 2010-07-15 | 오동준 | angle valve |
| JP2011196499A (en) * | 2010-03-23 | 2011-10-06 | Mirai Ind Co Ltd | Drain vent valve |
| JP2014238001A (en) * | 2014-07-17 | 2014-12-18 | 株式会社東京エネシス | Floor drain funnel |
| CN108006304A (en) * | 2017-12-28 | 2018-05-08 | 温州大阳科技有限公司 | A kind of integration module washes film solenoid valve |
| CN108006304B (en) * | 2017-12-28 | 2024-02-20 | 温州大阳科技有限公司 | Membrane washing electromagnetic valve of integrated module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20031104 |