JPH0446280A - Air valve - Google Patents

Air valve

Info

Publication number
JPH0446280A
JPH0446280A JP15055990A JP15055990A JPH0446280A JP H0446280 A JPH0446280 A JP H0446280A JP 15055990 A JP15055990 A JP 15055990A JP 15055990 A JP15055990 A JP 15055990A JP H0446280 A JPH0446280 A JP H0446280A
Authority
JP
Japan
Prior art keywords
valve
float
valve box
shaft
vent 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.)
Pending
Application number
JP15055990A
Other languages
Japanese (ja)
Inventor
Kazumi Tajiri
和美 田尻
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP15055990A priority Critical patent/JPH0446280A/en
Publication of JPH0446280A publication Critical patent/JPH0446280A/en
Pending legal-status Critical Current

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  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

PURPOSE:To insure smooth movement of float even if mixed object flows in a float chamber by providing a membranous body to partition the interior of a valve box into an upper space and a lower space and is ring-likely arranged around a float shaft. CONSTITUTION:A valve body 8 formed in one body with a valve rod 7 is arranged in a valve box 1. The valve rod 7 is formed with a vent hole 9 penetrating in the axial direction, and a float 10 is connected and fixed on the lower end of the valve rod 7 through a float shaft 11. A membranous body 14 formed out of elastic material is ring-likely arranged around the float shaft 11 while partitioning the interior of the valve box 1 into an upper space 1a and a lower space 1b, the inner circumferential edge of the membranous body 14 is pinchedly held between a fixed seat 15 formed on the shaft 11 and a tightening nut 16 screwed in the shaft 11, and the outer circumferential edge is pinchedly held between a valve box main body 2 and a valve box cover 3. A vent hole 17 is formed on the membranous body 14 at inner circumferential edge side. Hereby, inflow of mixed object to the vent hole of the valve rod can be prevented, and smooth elevatable motion of the float can be guaranteed.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は下水管路などにおいて用いられる空気弁に舅す
る。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to air valves used in sewer pipes and the like.

従来の技術 従来、下水管路の途中に設けられて管路中に混入する空
気を除去する空気弁としては、特願平l−120089
号に示されるようなものがある。これは、フロート室内
に流入する管路内の水によってフロートを持ち上げるこ
とにより遊動弁で排気孔を閉塞し、フロート室内に空気
が流入してフロートが降下することによって排気孔を開
放し、フロート室内の空気を排気孔を通して排出してい
る。
Prior Art Conventionally, an air valve installed in the middle of a sewage pipe to remove air mixed into the pipe has been disclosed in Japanese Patent Application No. 1-120089.
There is something like the one shown in the number. The floating valve closes the exhaust hole by lifting the float with the water in the pipe flowing into the float chamber, and when air flows into the float chamber and the float descends, the exhaust hole is opened and the float is raised inside the float chamber. The air is exhausted through the exhaust hole.

そして、フロート室内に流入する流体の飛沫を遮るため
に、排気孔とフロートの間に防護壁を設けるとともに、
防護壁を貫通してフロートの案内棒を配置している。
In order to block the splash of fluid flowing into the float chamber, a protective wall is provided between the exhaust hole and the float.
The float guide rod is placed through the protective wall.

発明が解決しようとする課題 しかし、上記した従来の構成によれば、管路内を下水等
が流通する場合に下水中の混入物がフロート室内に流入
し、流入した混入物が流体の飛沫とともに飛散して防護
壁とフロートの案内棒の間の間隙に入り込み、案内棒お
よびフロートの動きを阻害する問題があった。
Problems to be Solved by the Invention However, according to the above-mentioned conventional configuration, when sewage or the like flows through the pipe, contaminants in the sewage flow into the float chamber, and the contaminants that flow in together with the fluid splashes. There was a problem that the particles would fly off and enter the gap between the protective wall and the guide rod of the float, obstructing the movement of the guide rod and the float.

本発明は上記課題を解決するもので、フロート室内に混
入物が流入してもフロートの円滑な移動を確保すること
ができる空気弁を提供することを目的とする。
The present invention has been made to solve the above problems, and an object of the present invention is to provide an air valve that can ensure smooth movement of a float even if contaminants flow into the float chamber.

課題を解決するための手段 上記課題を解決するために本発明は、底部に管路に連通
ずる流体流入孔が形成されるとともに、上部に大気に連
通する排気孔が形成された弁箱と、排気孔に遊嵌して昇
降自在に配置されるとともに、軸心方向に貫通して通気
孔が形成された弁棒と、弁棒の途中に設けられて排気孔
を開閉する弁体と、弁棒の下端に上下方向に移動可能に
懸下されて通気孔の下端開口を開閉するフロート軸と、
フロート軸の下端に設けられたフロートとを備えた空気
弁において、弁箱内を上部空間と下部空間に仕切ってフ
ロート軸の周囲に環状に配置する膜体を、膜体の内周縁
をフロート軸の外周面に固定するとともに、外周縁を弁
箱の内周面に固定して設け、膜体に内周縁側に位置して
通気穴を形成した構成としたものである。
Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a valve box having a fluid inflow hole communicating with a pipe line at the bottom and an exhaust hole communicating with the atmosphere at the top; A valve stem that loosely fits into the exhaust hole and is arranged to be freely raised and lowered, and that penetrates in the axial direction to form a ventilation hole, a valve body that is provided in the middle of the valve stem and opens and closes the exhaust hole, and a valve. a float shaft that is vertically movably suspended from the lower end of the rod and opens and closes the lower end opening of the ventilation hole;
In an air valve equipped with a float provided at the lower end of a float shaft, a membrane body is arranged annularly around the float shaft, dividing the inside of the valve box into an upper space and a lower space, and the inner peripheral edge of the membrane body is attached to the float shaft. The valve body is fixed to the outer circumferential surface of the valve body, and the outer circumferential edge is fixed to the inner circumferential surface of the valve box, and a ventilation hole is formed in the membrane body at the inner circumferential edge side.

作用 上記した構成により、フロートの昇降に連動して弁体が
開閉動するとともに、膜体がフロートの昇降に追随して
変形する。つまり、管路内の流体が流体流入孔を通して
弁箱内に流入すると、流体による浮力を受けてフロート
が上昇するとともに、フロートに連動する弁体が弁箱の
排気孔を閉塞する。このとき、弁体の通気孔はフロート
軸の先端で閉塞されている。また、管路内を流体ととも
に流動する空気が流体流入孔を通して弁箱内に流入する
と、弁箱内の流体と空気が入れ替わって弁箱内に滞留す
る流体の液面が降下し、それに伴ってフロートも降下し
て弁棒の通気孔が開放されるとともに、フロートに連動
する弁体が排気孔を開放する。
Effect: With the above-described configuration, the valve body opens and closes in conjunction with the rise and fall of the float, and the membrane body deforms following the rise and fall of the float. That is, when the fluid in the pipe flows into the valve box through the fluid inflow hole, the float rises due to the buoyant force of the fluid, and the valve body interlocked with the float closes the exhaust hole of the valve box. At this time, the vent hole of the valve body is closed at the tip of the float shaft. Additionally, when the air flowing along with the fluid in the pipeline flows into the valve box through the fluid inlet hole, the fluid and air in the valve box replace each other, causing the level of the fluid stagnant in the valve box to fall. The float also descends to open the vent hole in the valve stem, and the valve body interlocked with the float opens the exhaust hole.

この状態で、弁箱内の空気が弁箱に流入する流体に押し
出されて排気孔を通って大気に流出するとともに、再び
弁箱内の流体の液面が上昇して上述の動作を繰り返す。
In this state, the air in the valve box is pushed out by the fluid flowing into the valve box and flows out into the atmosphere through the exhaust hole, and the level of the fluid in the valve box rises again to repeat the above operation.

さらに、上述の動作中において弁箱内に流入する空気は
膜体の通気穴を通って弁箱内の下部空間と上部空間を流
通する。
Furthermore, during the above-described operation, the air flowing into the valve body passes through the ventilation hole of the membrane body and flows between the lower space and the upper space within the valve body.

そして、排気時に流体は流体流入孔から飛沫を伴って弁
箱内に流入し、流体とともに流入する混入物が弁箱内に
飛散するが、膜体によって流体の飛沫および混入物が弁
箱の上部空間へ飛散することが阻止され、弁棒の通気孔
に対する混入物の流入が防止される。また、膜体とフロ
ート軸との間に間隙がなく、フロート軸と膜体が一体に
動くので、従来のように混入物によってフロート軸の動
きが阻害されることはない。
During exhaust, the fluid flows into the valve box from the fluid inlet hole with droplets, and the contaminants that flow in with the fluid are scattered into the valve box. Splashing into space is prevented and contaminants are prevented from entering the valve stem vent. Further, since there is no gap between the membrane body and the float shaft, and the float shaft and membrane body move together, the movement of the float shaft is not inhibited by contaminants as in the prior art.

実施例 以下本発明の一実施例を図面に基づいて説明する。第1
図において、弁箱1は弁箱本体2と弁箱M3によって形
成され、弁箱本体2の底部に管路4に連通ずる流体流入
孔5が形成されるとともに、弁箱蓋3の上部に大気に連
通する排気孔6が形成されている。また、弁箱1の内部
には弁箱蓋3に上下方向に出退自在に支持される弁棒7
が配置されており、弁棒7には弁箱蓋3の排気孔6を開
閉する弁体8が一体に形成されている。さらに、弁棒7
には軸心方向に貫通して通気孔9が形成されており、弁
棒7の下端にはフロート10がフロート軸11を介して
連結固定されている。このフロート10はフロート軸1
1に形成した長孔12を弁棒7の連結ピン13に係合さ
せ懸下されており、弁棒7の通気孔9の下端開口を閉塞
する位置と開放する位置とにわたって上下動可能になさ
れている。そして、ゴムなどの弾性材料で形成された膜
体14が、弁箱1の内部を上部空間1aと下部空間1b
に仕切ってフロート軸11の周囲に環状に配置されてお
り、膜体14は内周縁をフロート軸11に形成された固
定座I5とフロート軸IIに螺着された締結ナラ)IG
とに挟持されるキキもに、外周縁を弁箱本体2と弁箱蓋
3とに挟持されている。また、膜体■4には内周縁側に
位置して通気穴夏7が形成されている。
EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In the figure, a valve box 1 is formed by a valve box main body 2 and a valve box M3, and a fluid inflow hole 5 communicating with a pipe line 4 is formed at the bottom of the valve box main body 2, and an air inlet is formed at the top of the valve box lid 3. An exhaust hole 6 communicating with is formed. Also, inside the valve box 1, a valve stem 7 is supported on the valve box lid 3 so as to be able to move upwardly and downwardly.
A valve body 8 for opening and closing the exhaust hole 6 of the valve box lid 3 is integrally formed on the valve stem 7. Furthermore, valve stem 7
A vent hole 9 is formed through the valve stem 7 in the axial direction, and a float 10 is connected and fixed to the lower end of the valve stem 7 via a float shaft 11 . This float 10 is a float shaft 1
The elongated hole 12 formed in 1 is engaged with the connecting pin 13 of the valve stem 7, and the valve stem 7 is suspended so that it can move up and down between a position where the lower end opening of the vent hole 9 is closed and a position where it is opened. ing. A membrane body 14 made of an elastic material such as rubber divides the inside of the valve box 1 into an upper space 1a and a lower space 1b.
The membrane body 14 has an inner peripheral edge connected to a fixing seat I5 formed on the float shaft 11 and a fastening nut screwed to the float shaft II.
The outer periphery of the outer periphery is held between the valve box body 2 and the valve box lid 3. Further, ventilation holes 7 are formed in the membrane body 4 at positions on the inner peripheral edge side.

さらに、弁[7の通気孔9の下端開口にはゴム製弁座1
8が設けられており、通気孔9の上端開口はダイアフラ
ムI9で仕切られたダイアフラム部20の圧力室21に
連通している。
Furthermore, a rubber valve seat 1 is provided at the lower end opening of the vent hole 9 of the valve [7].
8 is provided, and the upper end opening of the vent hole 9 communicates with a pressure chamber 21 of a diaphragm portion 20 partitioned by a diaphragm I9.

以下、上記構成における作用について説明する。Hereinafter, the effects of the above configuration will be explained.

管路4を流れる下水等の流体22が流体流入孔5を通し
て弁箱1の内部に流入すると、流体22による浮力を受
けてフロート10が上昇するとともに、フロート10に
連動する弁体8が弁箱蓋3の排気孔6を閉塞する。この
とき、弁棒7の通気孔9の下端開口はフロート軸11の
先端で閉塞された状態にある。
When a fluid 22 such as sewage flowing through the pipe 4 flows into the valve box 1 through the fluid inflow hole 5, the float 10 rises due to the buoyant force of the fluid 22, and the valve body 8 interlocked with the float 10 moves toward the valve box. The exhaust hole 6 of the lid 3 is closed. At this time, the lower end opening of the vent hole 9 of the valve stem 7 is closed by the tip of the float shaft 11.

そして、管路4を流体22とともに流動する空気23が
流体流入孔5を通して弁箱1の内部に流入すると、空気
23の滞留量の増加に伴って弁箱工の内部に滞留する流
体22の液面が降下し、液面が降下するに伴ってフロー
ト10も降下する。このときフロー)10が初めに長孔
12の距離だけ降下して弁棒7の通気孔9が開放され、
弁箱1の内部の圧力が通気孔9を通して圧力室21に作
用し、弁棒7を押し下げる力として作用する。そして、
弁箱1の内部圧力によって排気孔6に押圧される弁体8
を押し下げた状態で、弁箱1の内部に滞留する空気23
が排気孔6から排出されるとともに、再び弁箱1の内部
に流体22が流入し、上述の動作を繰り返す。
When the air 23 flowing through the pipe 4 together with the fluid 22 flows into the valve box 1 through the fluid inlet hole 5, the amount of the fluid 22 remaining inside the valve case increases as the amount of air 23 accumulates increases. As the surface falls and the liquid level falls, the float 10 also falls. At this time, the flow 10 first descends by the distance of the elongated hole 12, and the vent hole 9 of the valve stem 7 is opened.
The pressure inside the valve box 1 acts on the pressure chamber 21 through the vent hole 9, and acts as a force pushing down the valve stem 7. and,
Valve body 8 pressed against exhaust hole 6 by internal pressure of valve box 1
Air 23 remaining inside the valve box 1 when pressed down
is discharged from the exhaust hole 6, and at the same time, the fluid 22 flows into the inside of the valve body 1 again, and the above-described operation is repeated.

尚、上述の動作中において弁箱1の内部に滞留する空気
23は膜体14の通気穴17を通って弁箱1の上部空間
1aと上部空間1bを流通する。
Note that during the above-described operation, the air 23 remaining inside the valve body 1 passes through the ventilation hole 17 of the membrane body 14 and flows between the upper space 1a and the upper space 1b of the valve body 1.

そして、排気時に流体22は流体流入孔5から飛沫を伴
って弁箱1の内部に流入し、流体22とともに流入する
混入物が弁箱1の内部に飛散するが、膜体14によって
流体22の飛沫および混入物が弁箱1の上部空間へ飛散
することが阻止され、弁棒7の通気孔9に対する混入物
の流入が防止される。
During exhaust, the fluid 22 flows into the valve box 1 from the fluid inlet hole 5 with droplets, and the contaminants flowing together with the fluid 22 are scattered inside the valve box 1. Splashes and contaminants are prevented from scattering into the upper space of the valve body 1, and contaminants are prevented from flowing into the vent hole 9 of the valve stem 7.

また、膜体14とフロート軸IIとの間に間隙がなく、
フロート軸11と膜体14が一体に動くので、従来のよ
うに混入物によってフロート軸IIの動きが阻害される
ことはない。
Further, there is no gap between the membrane body 14 and the float shaft II,
Since the float shaft 11 and the membrane body 14 move together, the movement of the float shaft II is not inhibited by contaminants as in the conventional case.

発明の効果 以上述べたように本発明によれば、膜体によって流体の
飛沫および混入物が弁箱の上部空間へ飛散することが阻
止され、弁棒の通気孔に対する混入物の流入が防止され
る。また、膜体とフロート軸との間に間隙がなく、フロ
ート軸と膜体が一体に動くので、従来のように混入物に
よってフロート軸の動きが阻害されず、フロートの円滑
な昇降動作を補償することができる。
Effects of the Invention As described above, according to the present invention, the membrane prevents fluid splashes and contaminants from scattering into the upper space of the valve box, and prevents contaminants from flowing into the vent hole of the valve stem. Ru. In addition, since there is no gap between the membrane body and the float shaft, and the float shaft and membrane body move together, the movement of the float shaft is not inhibited by contaminants as in the conventional case, and the smooth lifting and lowering movement of the float is ensured. can do.

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

第1図は本発明の一実施例を示す全体構成図である。 1・・・弁箱、5・・・流体流入孔、6・・・排気孔、
8・・・弁体、10・・・フロー)、14・・・膜体、
17・・・通気穴。
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. 1... Valve box, 5... Fluid inflow hole, 6... Exhaust hole,
8... Valve body, 10... Flow), 14... Membrane body,
17...Vent hole.

Claims (1)

【特許請求の範囲】[Claims] 1、底部に管路に連通する流体流入孔が形成されるとと
もに、上部に大気に連通する排気孔が形成された弁箱と
、排気孔に遊嵌して昇降自在に配置されるとともに、軸
心方向に貫通して通気孔が形成された弁棒と、弁棒の途
中に設けられて排気孔を開閉する弁体と、弁棒の下端に
上下方向に移動可能に懸下されて通気孔の下端開口を開
閉するフロート軸と、フロート軸の下端に設けられたフ
ロートとを備えた空気弁において、弁箱内を上部空間と
下部空間に仕切ってフロート軸の周囲に環状に配置する
膜体を、膜体の内周縁をフロート軸の外周面に固定する
とともに、外周縁を弁箱の内周面に固定して設け、膜体
に内周縁側に位置して通気穴を形成したことを特徴とす
る空気弁。
1. A valve box is formed with a fluid inflow hole communicating with the pipe line at the bottom and an exhaust hole communicating with the atmosphere at the top. A valve stem that penetrates in the center direction and has a vent hole formed in it, a valve body that is provided in the middle of the valve stem to open and close the exhaust hole, and a vent hole that is vertically movably suspended from the lower end of the valve stem. In an air valve equipped with a float shaft that opens and closes a lower end opening of the valve body and a float provided at the lower end of the float shaft, a membrane is arranged in an annular shape around the float shaft to partition the inside of the valve box into an upper space and a lower space. The inner circumferential edge of the membrane body is fixed to the outer circumferential surface of the float shaft, and the outer circumferential edge is fixed to the inner circumferential surface of the valve box, and ventilation holes are formed in the membrane body located on the inner circumferential edge side. Features an air valve.
JP15055990A 1990-06-08 1990-06-08 Air valve Pending JPH0446280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15055990A JPH0446280A (en) 1990-06-08 1990-06-08 Air valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15055990A JPH0446280A (en) 1990-06-08 1990-06-08 Air valve

Publications (1)

Publication Number Publication Date
JPH0446280A true JPH0446280A (en) 1992-02-17

Family

ID=15499528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15055990A Pending JPH0446280A (en) 1990-06-08 1990-06-08 Air valve

Country Status (1)

Country Link
JP (1) JPH0446280A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7712484B2 (en) 2004-07-16 2010-05-11 Smc Kabushiki Kaisha Paint selector valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7712484B2 (en) 2004-07-16 2010-05-11 Smc Kabushiki Kaisha Paint selector valve

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