JPH0545898Y2 - - Google Patents
Info
- Publication number
- JPH0545898Y2 JPH0545898Y2 JP6115289U JP6115289U JPH0545898Y2 JP H0545898 Y2 JPH0545898 Y2 JP H0545898Y2 JP 6115289 U JP6115289 U JP 6115289U JP 6115289 U JP6115289 U JP 6115289U JP H0545898 Y2 JPH0545898 Y2 JP H0545898Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- float
- water
- valve body
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 71
- 238000009423 ventilation Methods 0.000 claims description 16
- 230000010349 pulsation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は空気弁における管路水の排出防止装
置に関するものである。[Detailed description of the invention] Industrial application field This invention relates to a device for preventing discharge of pipe water in an air valve.
従来の技術
空気弁を上部に設置した送水管路が満水で、空
気弁の弁箱が加圧された状態において排気するこ
と、いわゆる圧力下排気について、従来の空気弁
における具体例として水道用急速空気弁を参考に
して説明すると、次の如くである。PRIOR TECHNOLOGY A specific example of a conventional air valve is a rapid pump for water supply, in which a water supply pipe with an air valve installed at the top is full of water and the valve box of the air valve is pressurized. The explanation with reference to the air valve is as follows.
すなわち、第8図に示すように空気弁の弁箱内
が満水状態で水中から分離した空気やガスが弁箱
1a内の上部に溜ると、水位が降下し、弁箱内と
弁箱外の大気圧との差圧によつて、小通気孔18
aを設けた小通気孔弁座17aにフロート弁26
aを密接させようとする力よりも、フロート弁2
6aに作用する浮力が減少して、フロート弁26
aを小通気孔弁座17aから離そうとする力とな
る。そして、フロート弁26aを小通気孔弁座1
7aから離そうとする力(フロート弁26aの重
量)が大きくなると、第9図に示すようにフロー
ト弁26aが小通気孔弁座17aから離れて小通
気孔18aを開放し、弁箱1a内の空気やガスは
小通気孔18aから大通気孔3aを経て外部へ排
出される。また、弁箱1a内の水位が上昇してく
ると、フロート弁26aも上昇して小通気孔18
aを閉鎖する。このように従来の空気弁における
圧力下排気はフロート弁26aが直接、小通気孔
18aを開閉することによつて行なわれている。 That is, as shown in Fig. 8, when the inside of the air valve box is full of water and air or gas separated from the water accumulates in the upper part of the valve box 1a, the water level drops and the inside and outside of the valve box are Due to the pressure difference with atmospheric pressure, the small ventilation hole 18
A float valve 26 is installed on the small vent valve seat 17a provided with a.
float valve 2 than the force that tries to bring a closer together.
The buoyant force acting on the float valve 26 is reduced.
This becomes a force that tends to separate the small vent valve seat 17a from the valve seat 17a. Then, the float valve 26a is attached to the small vent valve seat 1.
When the force (weight of the float valve 26a) to separate it from the valve body 7a increases, the float valve 26a separates from the small vent hole valve seat 17a, opening the small vent hole 18a, as shown in FIG. Air and gas are discharged from the small vent hole 18a to the outside through the large vent hole 3a. Furthermore, when the water level inside the valve box 1a rises, the float valve 26a also rises and the small vent hole 18
Close a. In this manner, exhaust under pressure in the conventional air valve is performed by the float valve 26a directly opening and closing the small vent hole 18a.
6aはガイドで、その下部底壁には充水孔9a
が設けられている。10aは遊動弁体で、フロー
ト弁26aとともにガイド6a内に昇降自在に収
納されている。 6a is a guide with a water filling hole 9a in its lower bottom wall.
is provided. Reference numeral 10a denotes a floating valve body, which is housed in the guide 6a together with the float valve 26a so as to be movable up and down.
考案が解決しようとする課題
ところで、前記従来の空気弁を圧力変動がきわ
めて緩やかな送水管路に設置する場合には問題な
いとしても、送水ポンプなどの影響によつて圧力
が脈動的に変化する送水管路に設置すると、水中
から分離して弁箱内の上部に溜つた圧縮性のある
空気やガスは管路の圧力変動によつて体積が変動
し、空気やガスの体積の変動によつて水位が脈動
的に変動するとともに、該水位の変動によつてフ
ロート弁26aが脈動的に昇降を繰り返す。そし
て、降下する際、フロート弁26aは慣性により
水中に沈み、続く脈動で前記水没状態のフロート
弁26aは水とともに上昇し弁座18aに衝突し
て停止するが、フロート弁が弁座に衝突するまで
のフロート弁の上面にある水は空気やガスと一緒
になつて小通気孔18aを通過して排出され、ポ
ンプ室の床が水浸しになるというトラブルが発生
するという問題点がある。Problems that the invention aims to solve By the way, even if there is no problem when the conventional air valve is installed in a water supply pipeline where pressure fluctuations are extremely gradual, the pressure changes pulsatingly due to the influence of water supply pumps, etc. When installed in a water pipeline, the compressible air or gas that separates from the water and accumulates in the upper part of the valve box changes in volume due to pressure fluctuations in the pipeline, and changes in the volume of the air or gas. As the water level changes in a pulsating manner, the float valve 26a repeats raising and lowering in a pulsating manner due to the fluctuation in the water level. Then, when descending, the float valve 26a sinks into the water due to inertia, and with the subsequent pulsation, the submerged float valve 26a rises with the water, collides with the valve seat 18a, and stops, but the float valve collides with the valve seat. The water present on the upper surface of the float valve is discharged together with air and gas through the small vent hole 18a, resulting in a problem that the floor of the pump room is flooded with water.
このような問題点は第8,9図に示すタイプの
空気弁ばかりでなく、第10図に示すように弁箱
1a内に前記のようなガイド6a、遊動弁体10
aがなくて、弁箱1aの上部を閉鎖する上壁中央
部に設けられた通気孔29aをフロート弁26a
により、直接に開閉するタイプの空気弁でも同様
のことが言える。 Such problems arise not only with the type of air valve shown in FIGS. 8 and 9, but also with the above-mentioned guide 6a and floating valve body 10 in the valve body 1a, as shown in FIG.
a, the air hole 29a provided in the center of the upper wall that closes the upper part of the valve box 1a is used as the float valve 26a.
The same can be said for air valves that open and close directly.
そこで、この考案は前記のような従来の問題点
を解決し、送水管路内の圧力が脈動的に変化して
も、空気弁の圧力下排気の際に管路内の水が弁箱
内から排出されないようにすることを技術的課題
とする。 Therefore, this invention solves the above-mentioned conventional problems, and even if the pressure inside the water supply pipe changes pulsatingly, the water in the pipe will not flow into the valve box when the air valve is exhausted under pressure. The technical challenge is to prevent it from being emitted.
課題を解決するための手段
前記課題を解決するため、この出願の第1の考
案は、送水管路の上部に、該管路内と連通する下
部開口を有する弁箱を設置し、この弁箱の上部を
閉鎖する上壁中央部に通気孔を設けた空気弁にお
いて、弁箱内にフロートを昇降自在に設け、この
フロートの前記通気孔と対向する位置に上下端開
口の保持部材を設立し、この保持部材で通気孔を
開閉する弁体をフロートの昇降ストロークよりも
小さな遊びをもつて昇降方向に移動自在に保持し
たことを特徴とする。Means for Solving the Problems In order to solve the above-mentioned problems, the first invention of this application is to install a valve box having a lower opening communicating with the inside of the water pipe in the upper part of the water supply pipe. In an air valve having a ventilation hole in the center of the upper wall that closes the upper part of the air valve, a float is provided in the valve box so as to be able to rise and fall freely, and a holding member with openings at the upper and lower ends of the float is provided at a position facing the ventilation hole. The valve body for opening and closing the vent is held by the holding member so as to be movable in the vertical direction with a play smaller than the vertical stroke of the float.
また、この出願の第2の考案は、送水管路の上
部に、該管路内と連通する下部開口を有する弁箱
を設置し、この弁箱の上部を閉鎖する上壁中央部
に通気孔を設けた空気弁において、弁箱内にガイ
ド部材を固定し、このガイド部材内に上端が上壁
によつて閉塞され、かつ下端が開口した筒状の遊
動弁体を前記下部開口から弁箱内に流入する水の
浮力によつて前記通気孔を開閉可能なように昇降
自在に設け、この遊動弁体の上壁中央部に第2通
気孔を設け、また前記弁箱内の遊動弁体の下方に
フロートを昇降自在に設け、このフロートの前記
遊動弁体の第2通気孔と対向する位置に上下端開
口の保持部材を設立し、この保持部材で第2通気
孔を開閉する弁体をフロートの昇降ストロークよ
りも小さな遊びをもつて昇降方向に移動自在に保
持したことを特徴とするものである。 In addition, the second invention of this application is to install a valve box having a lower opening communicating with the inside of the water pipe in the upper part of the water supply pipe, and to provide a ventilation hole in the center of the upper wall that closes the upper part of the valve box. A guide member is fixed in the valve box, and a cylindrical floating valve body whose upper end is closed by the upper wall and whose lower end is open is inserted into the guide member from the lower opening of the valve box. The air hole is provided so that it can be raised and lowered so that it can be opened and closed by the buoyancy of water flowing into the valve body, and a second air hole is provided in the center of the upper wall of the floating valve body, and A float is provided below the float so that it can be raised and lowered, and a holding member having upper and lower end openings is provided on the float at a position facing the second vent hole of the floating valve body, and the holding member opens and closes the second vent hole. is characterized in that it is held movably in the vertical direction with a play smaller than the vertical stroke of the float.
作 用
空気弁の弁箱内が満水状態で、水中から分離し
た空気やガスが弁箱内の上部に溜り、水位の降下
によつてフロートが弁体の遊びぶん降下すると、
通気孔又は第2通気孔と弁体の密接面に作用する
弁箱内と大気圧との差圧によつて弁体を通気孔又
は第2通気孔に密接させようとする力と、弁体と
フロートの重量によつて弁体を通気孔又は第2通
気孔から離そうとする力とがつり合う。この状態
から水位が降下してフロートに作用する浮力が減
少し、密接面に作用する弁体とフロートの重量が
増加すると、弁体が通気孔又は第2通気孔から離
れて通気孔又は第2通気孔を開放し、これにより
圧力下排気が行なわれるが、この際例え管路の圧
力が脈動的に変動し、フロートが水中に沈み、該
状態で脈動により水面が上昇しても弁体の上面は
フロートの上面よりも少なくとも前記の遊びだけ
は上方にあるから、弁体の上面が水中に沈むよう
なことはなく、管路内の水が空気やガスと一緒に
排出されるようなことはない。Function When the valve box of the air valve is full of water, air and gas separated from the water accumulate in the upper part of the valve box, and as the water level falls, the float falls by the amount of play on the valve body.
A force that tries to bring the valve body into close contact with the vent or the second vent due to the differential pressure between the inside of the valve box and the atmospheric pressure acting on the close contact surface of the vent or the second vent and the valve body; and the force that tends to separate the valve body from the vent hole or the second vent hole due to the weight of the float. From this state, when the water level falls and the buoyant force acting on the float decreases, and the weight of the valve body and float acting on the close contact surface increases, the valve body separates from the vent or the second vent and the buoyant force acting on the float decreases. The vent hole is opened and exhaust under pressure is performed. At this time, even if the pressure in the pipeline fluctuates pulsatingly and the float sinks into the water, and in this state the water level rises due to the pulsations, the valve body will not move. Since the top surface is above the top surface of the float by at least the amount of play mentioned above, the top surface of the valve body will not sink into the water, and the water in the pipe will be discharged together with air and gas. There isn't.
考案の効果
この考案は前記のようであつて、送水管路内の
水の脈動で空気弁内の水が空気などとともに、排
出されることがないので、空気弁の設置場所の床
の浸水の恐れが全くなく、したがつて管路内の水
が脈動する管路に安心して設置できるとともに、
弁体が通気孔又は第2通気孔に密接した状態で、
管路圧力の脈動的変動によつてフロートが脈動的
に昇降しても、弁体の遊びの範囲内におけるフロ
ートの昇降ストロークは弁体に伝達されないか
ら、弁体が通気孔又は第2通気孔を開閉するため
にこれに接離する回数が著しく減少して、該接離
部分(弁体および通気孔又は第2通気孔部)の寿
命が長く、長期間メンテナスフリーになるという
利点がある。Effects of the invention This invention is as described above, and since the water in the air valve is not discharged together with the air due to the pulsation of water in the water supply pipe, it prevents water from flooding on the floor where the air valve is installed. There is no fear at all, so it can be installed with confidence in pipes where the water inside the pipe is pulsating, and
With the valve body in close contact with the ventilation hole or the second ventilation hole,
Even if the float rises and falls in a pulsating manner due to pulsating fluctuations in pipe pressure, the lift stroke of the float within the play area of the valve body is not transmitted to the valve body. This has the advantage that the number of times the valve is brought into contact with and separated from it to open and close it is significantly reduced, and the life of the contact and separation parts (the valve body and the vent or the second vent portion) is extended, and maintenance is free for a long period of time.
実施例
実施例はこの考案を水道用急速空気弁に適用し
たものを示す。Example The example shows the application of this invention to a rapid air valve for water supply.
第1〜5図において1は空気弁の弁箱で、この
弁箱1は図示しない送水管路内と連通する下部開
口2を有し、かつその上部には大通気孔3を設け
たカバー4が固定されている。5は大通気孔弁座
である。6は弁箱1内に固定された有底筒状のガ
イドで、このガイド6の外周には環状流路7が形
成されている。8はガイド6の上部周壁に設けた
大通気孔3と環状流路7を連通する流入孔、9は
ガイド6の下部底壁に設けた充水孔である。 In Figs. 1 to 5, 1 is a valve box of an air valve, and this valve box 1 has a lower opening 2 that communicates with the inside of a water supply pipe (not shown), and a cover 4 with a large ventilation hole 3 provided in the upper part thereof. Fixed. 5 is the large vent valve seat. Reference numeral 6 denotes a bottomed cylindrical guide fixed within the valve box 1, and an annular flow path 7 is formed on the outer periphery of the guide 6. Reference numeral 8 indicates an inflow hole that communicates the large ventilation hole 3 provided in the upper circumferential wall of the guide 6 with the annular flow path 7, and 9 indicates a water filling hole provided in the lower bottom wall of the guide 6.
10はガイド6に収納され、ガイド6に案内さ
れて大通気孔弁座5とガイド6に設けたストツパ
11の間を昇降して大通気孔3を開閉する筒状の
遊動弁体で、この遊動弁体10の周壁には流入孔
8を介して内部が環状流路7と連通する連通孔1
2が穿設されている。13は遊動弁体10の下方
位置にあつて、ガイド6に案内されて昇降するフ
ロートで、このフロート13の上面に設立した上
下端開口の保持筒14の保持穴15には上下端に
鍔部を有する弁体19が昇降(上下)方向に遊び
をもつて、かつ2つ割れの保持リング20を介
して抜き出し不能に保持されている。弁体19は
固定部材16によつて遊動弁体10の上壁中央部
に固定した小通気孔弁座17に設けられた小通気
孔18を開閉するものであり、かつその遊びは
フロート13の昇降ストロークL(第2図に示す)
よりも小さくなつている。 Reference numeral 10 denotes a cylindrical floating valve body that is housed in the guide 6 and is guided by the guide 6 to move up and down between the large vent valve seat 5 and the stopper 11 provided on the guide 6 to open and close the large vent 3. A communication hole 1 is provided in the peripheral wall of the body 10, the inside of which communicates with the annular flow path 7 via an inflow hole 8.
2 is drilled. Reference numeral 13 denotes a float that is positioned below the floating valve body 10 and moves up and down guided by the guide 6.A retaining hole 15 of a retaining cylinder 14 with openings at the upper and lower ends provided on the upper surface of the float 13 has flanges at the upper and lower ends. A valve body 19 having a valve body 19 is held with play in the vertical (vertical) direction and cannot be pulled out via a retaining ring 20 which is split into two parts. The valve body 19 opens and closes a small vent hole 18 provided in a small vent valve seat 17 fixed to the center part of the upper wall of the floating valve body 10 by a fixed member 16, and the play is caused by the movement of the float 13. Lifting stroke L (shown in Figure 2)
It's getting smaller than that.
弁体19と保持リング20との間隙21と、保
持筒14の下端部にあつて保持穴15から放射状
に外部に開口する複数個の小孔22は、弁体19
が保持穴15内を円滑かつ緩やかに移動するよう
に緩衝孔の役割りをする。23は大通気孔3に異
物が落下することを防止することなどの役割りを
するカバーである。 A gap 21 between the valve body 19 and the retaining ring 20 and a plurality of small holes 22 located at the lower end of the retaining cylinder 14 and opening radially outward from the retaining hole 15 are formed in the valve body 19.
The holding hole 15 functions as a buffer hole so that it moves smoothly and gently within the holding hole 15. A cover 23 serves to prevent foreign matter from falling into the large ventilation hole 3.
前記実施例において、第1図は送水管路に通水
されておらず、したがつて空気弁の弁箱1内には
水がない場合を示している。この状態では遊動弁
体10はストツパ11上に載置されて大通気孔3
を開放しているとともに、フロート13はガイド
6の底壁に載置されており、かつ弁体19は保持
穴15の最下位にあつて小通気孔18を開放して
いる。 In the embodiment described above, FIG. 1 shows a case where water is not being supplied to the water pipe and therefore there is no water in the valve box 1 of the air valve. In this state, the floating valve body 10 is placed on the stopper 11 and the large ventilation hole 3
The float 13 is placed on the bottom wall of the guide 6, and the valve body 19 is located at the lowest position of the holding hole 15 and opens the small ventilation hole 18.
第1図の状態から通水が開始して管路内が充水
されてくると、管路内の空気は下部開口2から弁
箱1内に入り、そのほとんどが環状流路7、流入
孔8を介して大通気孔3から弁箱1外に急速に排
出される。 When water starts to flow from the state shown in Fig. 1 and the inside of the pipe is filled with water, the air inside the pipe enters the valve box 1 from the lower opening 2, and most of the air enters the annular flow path 7 and the inflow hole. It is rapidly discharged from the large ventilation hole 3 to the outside of the valve body 1 via the valve casing 8 .
管路内が満水状態になり、水が弁箱1内に入つ
て来ると、ガイド6内には充水孔9から水が入
り、ガイド6内の水位は環状流路7とほぼ同じ水
位で上昇し、この水位の上昇によつてフロート1
3は上昇して遊動弁体10を上昇させ、第2図に
示すように弁箱1内は満水状態となり、弁体19
は小通気孔弁座17に密接して小通気孔18を閉
鎖するとともに、遊動弁体10は大通気孔弁座5
に密接して大通気孔3を閉鎖する。 When the inside of the pipe becomes full of water and water enters the valve box 1, the water enters the guide 6 from the water filling hole 9, and the water level inside the guide 6 is almost the same as that of the annular flow path 7. and due to this rise in water level, float 1
3 rises to raise the floating valve body 10, and as shown in FIG.
is in close contact with the small vent valve seat 17 to close the small vent hole 18, and the floating valve body 10 is in close contact with the large vent valve seat 5.
Close the large ventilation hole 3 in close contact with the
第2図の弁箱1内が満水状態で、水中から分離
した空気やガスが上部に溜り、水位の降下によつ
て第3図に示すようにフロート13が弁体19の
遊びだけ降下すると、小通気孔弁座17と弁体
19の密接面に作用する弁箱1内と大気圧との差
圧によつて弁体19を小通気孔弁座17に密接さ
せようとする力と、弁体19と保持筒14、保持
リング20を含めたフロート13の重量がつり合
う。 When the inside of the valve box 1 in FIG. 2 is full of water, air and gas separated from the water accumulate in the upper part, and as the water level falls, the float 13 descends by the play of the valve body 19 as shown in FIG. The force that tries to bring the valve body 19 into close contact with the small vent valve seat 17 due to the differential pressure between the inside of the valve box 1 and the atmospheric pressure acting on the close contact surface between the small vent valve seat 17 and the valve body 19, and the valve The weights of the float 13 including the body 19, the holding cylinder 14, and the holding ring 20 are balanced.
この第3図の状態から水位がさらに降下して、
フロート13に作用する浮力が減少し、小通気孔
弁座17と弁体19の密接面に作用する弁体19
とフロート13の重量が増加すると、第4図に示
すように弁体19は小通気孔弁座17から離れ、
ついで第5図に示すように緩やかに保持穴15の
最下位に降下し、小通気孔弁座17との間隙が大
きくなり、小通気孔18が開放されて圧力下排気
が行なわれる。この際、たとえ管路の圧力が脈動
的に変動する場合でフロート13が水中に沈んだ
としても、弁体19の上面はフロート13の上面
よりも遊びの以上に上方にあるから、弁体19
の上面が水中に沈むようなことはなく、管路内の
水が空気やガスと一緒に排出されるようなことは
ない。 From the state shown in Figure 3, the water level further drops,
The buoyant force acting on the float 13 is reduced and the valve element 19 acts on the close contact surface between the small vent valve seat 17 and the valve element 19.
When the weight of the float 13 increases, the valve body 19 moves away from the small vent valve seat 17, as shown in FIG.
Then, as shown in FIG. 5, it slowly descends to the lowest position of the holding hole 15, the gap between it and the small vent hole valve seat 17 becomes large, and the small vent hole 18 is opened to perform exhaustion under pressure. At this time, even if the float 13 sinks into the water due to pulsating pressure fluctuations in the pipeline, the upper surface of the valve element 19 is higher than the upper surface of the float 13 by more than the play, so the valve element 19
The top surface of the pipe will not be submerged in water, and the water in the pipe will not be discharged together with air or gas.
圧力下排気が終わると、弁箱1内は再び第2図
のように満水状態となり、大通気孔3および小通
気孔18は閉鎖される。 When the exhaust under pressure is finished, the inside of the valve box 1 becomes full of water again as shown in FIG. 2, and the large vent hole 3 and the small vent hole 18 are closed.
前記間隙21および小孔22が緩衝孔の役割り
をするから、フロート13が脈動的に昇降して小
通気孔18を開閉しようとしても、弁体19が小
通気孔弁座17に緩やかに接離する。そのため、
衝撃音を発するようなことがなく、またより以上
に小通気孔弁座17の寿命を延ばすという利点が
ある。 Since the gap 21 and the small hole 22 function as a buffer hole, even if the float 13 moves up and down in a pulsating manner to open and close the small vent hole 18, the valve body 19 gently contacts the small vent hole valve seat 17. Let go. Therefore,
There is an advantage that no impact noise is generated and the life of the small vent valve seat 17 is further extended.
第6,7図はこの考案を水道用単口空気弁に適
用した別の実施例を示す。この実施例において
は、弁箱1の上部が上壁4′によつて閉鎖され、
該上壁中央部に形成された孔部26に弁座受25
が取付けられている。弁座受25には弁箱1の内
外を連通する通気孔27が形成されている。ま
た、弁座受25の下部小径部の下面に円錐状の小
通気孔弁座28が上面を当接させて配置され、こ
の弁座28はその小通気孔29が通気孔27と連
通するように、弁座受25の下部小径部の周面に
形成されたおねじにめねじが螺合して装着された
保持筒30で保持されている。 Figures 6 and 7 show another embodiment in which this invention is applied to a single-port air valve for water supply. In this embodiment, the upper part of the valve body 1 is closed by an upper wall 4',
A valve seat receiver 25 is inserted into the hole 26 formed in the center of the upper wall.
is installed. A vent hole 27 is formed in the valve seat support 25 to communicate the inside and outside of the valve box 1. Further, a conical small vent hole valve seat 28 is arranged on the lower surface of the lower small diameter portion of the valve seat support 25 with its upper surface in contact with the valve seat 28 so that its small vent hole 29 communicates with the vent hole 27. The valve seat support 25 is held by a holding cylinder 30 having a female thread screwed onto a male thread formed on the circumferential surface of the lower small diameter portion of the valve seat support 25.
そのほかはガイド6、遊動弁体10がない等、
一部の構成に相違があるものの、フロート13お
よびフロート13に設けられる弁体19等の構成
は前記実施例と同じようになつている。作用も前
記実施例と同様であり、第6図が第1図と、第7
図が第2図とそれぞれ対応する。 Other than that, there is no guide 6, no floating valve body 10, etc.
Although there are some differences in the configuration, the configurations of the float 13, the valve body 19 provided on the float 13, etc. are the same as in the previous embodiment. The effect is also the same as in the previous embodiment, and FIG. 6 is different from FIG. 1 and FIG. 7.
The figures correspond to FIG. 2, respectively.
なお、実施例はこの考案を水道用急速空気弁、
水道用単口空気弁に適用したが、その他圧力下排
気が行なわれる空気弁にも適用できることは言う
までもない。 In addition, this example is a rapid air valve for water supply,
Although the present invention has been applied to a single-port air valve for water supply, it goes without saying that it can also be applied to other air valves that perform exhaustion under pressure.
第1図乃至第5図はこの考案の一実施例を示す
縦断正面図、第6図乃至第7図は別の実施例を示
す縦断正面図、第8図乃至第10図は従来例を示
す縦断正面図である。
1……弁箱、2……下部開口、3……大通気
孔、6……ガイド、10……遊動弁体、13……
フロート、14……保持筒、15……保持穴、1
7,28……小通気孔弁座、18,29……小通
気孔。
1 to 5 are longitudinal sectional front views showing one embodiment of this invention, 6 to 7 are longitudinal sectional front views showing another embodiment, and 8 to 10 are conventional examples. FIG. 1... Valve box, 2... Lower opening, 3... Large ventilation hole, 6... Guide, 10... Idle valve body, 13...
Float, 14... Holding tube, 15... Holding hole, 1
7, 28... Small vent valve seat, 18, 29... Small vent.
Claims (1)
開口を有する弁箱を設置し、この弁箱の上部を
閉鎖する上壁中央部に通気孔を設けた空気弁に
おいて、 前記弁箱内にフロートを昇降自在に設け、こ
のフロートの前記通気孔と対向する位置に上下
端開口の保持部材を設立し、この保持部材で通
気孔を開閉する弁体をフロートの昇降ストロー
クよりも小さな遊びをもつて昇降方向に移動自
在に保持したことを特徴とする空気弁における
管路水の排出防止装置。 2 送水管路の上部に、該管路内と連通する下部
開口を有する弁箱を設置し、この弁箱の上部を
閉鎖する上壁中央部に通気孔を設けた空気弁に
おいて、 前記弁箱内にガイド部材を固定し、このガイ
ド部材内に上端が上壁によつて閉塞され、かつ
下端が開口した筒状の遊動弁体を前記下部開口
から弁箱内に流入する水の浮力によつて前記通
気孔を開閉可能なように昇降自在に設け、この
遊動弁体の上壁中央部に第2通気孔を設け、ま
た前記弁箱内の遊動弁体の下方にフロートを昇
降自在に設け、このフロートの前記遊動弁体の
第2通気孔と対向する位置に上下端開口の保持
部材を設立し、この保持部材で第2通気孔を開
閉する弁体をフロートの昇降ストロークよりも
小さな遊びをもつて昇降方向に移動自在に保持
したことを特徴とする空気弁における管路水の
排出防止装置。[Scope of Claim for Utility Model Registration] 1. A valve box having a lower opening communicating with the inside of the water pipe is installed in the upper part of the water pipe, and a ventilation hole is provided in the center of the upper wall that closes the upper part of the valve box. In the air valve, a float is provided in the valve box so as to be movable up and down, and a holding member with openings at the upper and lower ends of the float is provided at a position facing the vent hole, and a valve body that opens and closes the vent hole is mounted with the holding member. A device for preventing discharge of pipe water in an air valve, characterized in that the air valve is held movably in the up and down direction with a play smaller than the up and down stroke of the float. 2. An air valve in which a valve box having a lower opening that communicates with the inside of the water pipe is installed in the upper part of the water supply pipe, and a vent hole is provided in the center of the upper wall that closes the upper part of the valve box, wherein the valve box A guide member is fixed inside the valve body, and a cylindrical floating valve body whose upper end is closed by the upper wall and whose lower end is open is inserted into the guide member by the buoyancy of water flowing into the valve box from the lower opening. A second ventilation hole is provided in the center of the upper wall of the floating valve body, and a float is provided below the floating valve body in the valve box so that it can be raised and lowered. , a holding member having upper and lower end openings is established at a position facing the second vent hole of the floating valve body of the float, and the holding member is used to hold the valve body that opens and closes the second vent hole with a play smaller than the lifting stroke of the float. 1. A device for preventing discharge of pipe water in an air valve, characterized in that the air valve is held movably in the vertical direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6115289U JPH0545898Y2 (en) | 1989-05-26 | 1989-05-26 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6115289U JPH0545898Y2 (en) | 1989-05-26 | 1989-05-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03378U JPH03378U (en) | 1991-01-07 |
JPH0545898Y2 true JPH0545898Y2 (en) | 1993-11-29 |
Family
ID=31589150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6115289U Expired - Lifetime JPH0545898Y2 (en) | 1989-05-26 | 1989-05-26 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0545898Y2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009127784A (en) * | 2007-11-27 | 2009-06-11 | Atsushi Suzuki | Rapid air valve |
JP5718666B2 (en) * | 2011-02-10 | 2015-05-13 | 株式会社ベン | Intake / exhaust valve device |
JPWO2015019426A1 (en) * | 2013-08-07 | 2017-03-02 | 株式会社日立製作所 | Inundation prevention piping |
-
1989
- 1989-05-26 JP JP6115289U patent/JPH0545898Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03378U (en) | 1991-01-07 |
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