JP5220390B2

JP5220390B2 - Exhaust valve

Info

Publication number: JP5220390B2
Application number: JP2007296943A
Authority: JP
Inventors: 利行関
Original assignee: Tlv Co Ltd
Current assignee: Tlv Co Ltd
Priority date: 2007-11-15
Filing date: 2007-11-15
Publication date: 2013-06-26
Anticipated expiration: 2027-11-15
Also published as: JP2009121609A

Description

本発明は、配管に水を送り込むときに開弁して配管内の空気を排気し、通水始めの排気が終われば閉弁し、また配管系の圧力が低下して真空状態となったときに開弁して外部空気を導入することにより真空状態を破壊する排気弁に関する。 The present invention opens the valve when water is fed into the pipe, exhausts the air in the pipe, closes when exhausting at the beginning of the water flow is completed, and when the pressure in the pipe system drops to a vacuum state The present invention relates to an exhaust valve that breaks the vacuum state by opening the valve to introduce external air.

従来の排気弁は、ケーシングで下部に流入口が開口し上部に流出口が開口した弁室を形成し、弁室と流出口の間に弁座を形成し、弁室内壁に内側に突出したリブを形成し、リブの内側に有底のほぼ円筒形状で底部に内外を連通する通孔を設けたフロート受けを固定し、フロート受け内にフロートを自由状態で配したものである。この排気弁は、先ず配管に水を送り込むときにはフロートが弁座から離座して降下した開弁状態であり、流入口から弁室内に流入してくる配管内の空気をリブの間の空間からフロート受け上端を通して、及び通孔からフロート受け内周とフロート外周との間を通して弁座から流出口に排気する。そして通水始めの排気が終わって配管内の水が流入口から弁室内に流入してくると、リブの間の空間からフロート受け上端を通して、及び通孔を通してフロート受け内に流入する水によってフロートが浮上して弁座に着座し閉弁する。また配管系の圧力が低下して真空状態となったときにはフロートが弁座から離座して降下し、流出口から弁座を通して弁室内に流入してくる外部空気をフロート受け内から通孔を通して、及びフロート受け上端からリブの間の空間を通して流入口から配管内に導入することにより真空状態を破壊する。 A conventional exhaust valve forms a valve chamber with an inlet opening at the bottom and an outlet opening at the top of the casing, forming a valve seat between the valve chamber and the outlet, and projecting inward to the valve chamber wall. A float receiver is formed in which a rib is formed, and a bottom having a substantially cylindrical shape with a bottom and a through hole communicating with the inside and the outside is fixed to the inside of the rib, and the float is arranged in a free state in the float receiver. This exhaust valve is in an open state in which when the water is first fed into the pipe, the float is separated from the valve seat and descends, and the air in the pipe flowing into the valve chamber from the inlet is drawn from the space between the ribs. The air is exhausted from the valve seat to the outlet through the upper end of the float receiver and through the through hole between the inner periphery of the float receiver and the outer periphery of the float receiver. Then, when the exhaust at the beginning of water flow ends and the water in the pipe flows into the valve chamber from the inlet, the water flows into the float receiver from the space between the ribs through the upper end of the float receiver and through the through hole. Rises and sits on the valve seat and closes. When the pressure in the piping system decreases and the vacuum state is reached, the float moves away from the valve seat and descends.External air flowing into the valve chamber from the outlet through the valve seat passes through the through hole from the float receiver. And the vacuum state is broken by introducing it into the pipe from the inlet through the space between the upper end of the float receiver and the rib.

上記従来の排気弁は、真空状態を破壊するときにフロートが充分に降下せず、半開状態になったりあるいは小刻みな開閉弁を繰り返したりするために、真空破壊能力が小さく真空破壊に時間がかかると言う問題点があった。これは、流出口から弁座を通して弁室内に流入する外部空気の大半が直進してフロート受け内に入り、フロート受けの底部に当たって跳ね返るために、フロートが浮き上がるためである。またフロート受け内に入った外部空気が通孔を通過しきれないために、フロート受け内のフロート下方の圧力が上昇し、フロートが浮き上がるためである。
実公昭５３−１６２２号公報 In the conventional exhaust valve, the float does not drop sufficiently when breaking the vacuum state, and the vacuum breaking ability is small and the vacuum breaking takes time because the float is not fully opened or the opening / closing valve is repeated little by little. There was a problem. This is because most of the external air flowing into the valve chamber from the outlet through the valve seat goes straight into the float receiver and bounces back against the bottom of the float receiver, so that the float rises. Further, since the outside air that has entered the float receiver cannot pass through the through hole, the pressure below the float in the float receiver rises and the float rises.
Japanese Utility Model Publication No. 53-1622

従って本発明の技術的課題は、真空破壊能力が大きく速やかに真空破壊できる排気弁を提供することである。 Therefore, the technical problem of the present invention is to provide an exhaust valve that has a large vacuum breaking ability and can be quickly broken.

上記の技術的課題を解決するために講じた本発明の技術的手段は、ケーシングで下部に流入口が開口し上部に流出口が開口した弁室を形成し、弁室と流出口の間に弁座を形成し、弁室内壁に内側に突出したリブを形成し、リブの内側に有底のほぼ円筒形状で底部に内外を連通する通孔を設けたフロート受けを固定し、フロート受け内に球形のフロートを自由状態で配し、フロートの上方にフロートの上部外表面に沿ってフロートの上部外表面を覆いフロートの直径以上の外径に形成した下端外周縁がフロート受けの内周面を摺接して弁座に離着座する弁部材を配置し、フロートの外表面がフロート受けの内周面を摺接することなく弁部材の下端外周縁がフロート受けの内周面を摺接し、フロートが離着座する小径弁座を弁部材に形成したことを特徴とするものである。 The technical means of the present invention taken in order to solve the above technical problem is to form a valve chamber having an inflow opening in the lower part and an outflow opening in the upper part in the casing, and between the valve chamber and the outflow opening. A valve seat is formed, a rib projecting inward is formed on the inner wall of the valve chamber, and a float receiver with a bottomed, almost cylindrical shape with a through hole communicating with the inside and outside is fixed inside the rib. A spherical float is arranged in a free state, and the outer peripheral edge of the float receiver is the outer peripheral edge of the float receiver that is formed above the float along the upper outer surface of the float, covering the upper outer surface of the float and having an outer diameter equal to or greater than the diameter of the float A valve member that slides in and out of contact with the valve seat is disposed, and the outer peripheral surface of the float does not slidably contact the inner peripheral surface of the float receiver, and the outer peripheral edge of the lower end of the valve member slidably contacts the inner peripheral surface of the float receiver. The valve member is formed with a small-diameter valve seat that allows seating It is an feature.

本発明は、フロートの上方にフロート受けの内周面を摺接して弁座に離着座する弁部材を配置して、外部空気が弁部材によってフロート下方のフロート受け内に流入し難くすることにより、真空破壊能力が大きく速やかに真空破壊できるという優れた効果を生じる。また、フロートが離着座する小径弁座を弁部材に形成したことにより、通水始めの排気が終わった後に弁室内に空気が流入してくる都度、フロートが小径弁座から離座して降下し、流入口から弁室内に流入してくる配管内の空気を通孔からフロート受け内周とフロート外周との間を通して小径弁座から流出口に排気できるという優れた効果を生じる。 The present invention provides a valve member that slides on the inner peripheral surface of the float receiver above the float so as to be seated on and off of the valve seat, and prevents the outside air from flowing into the float receiver below the float by the valve member. The vacuum breaking ability is large, and an excellent effect of being able to break the vacuum quickly is produced. In addition, by forming a small-diameter valve seat on the valve member that allows the float to be separated, the float moves away from the small-diameter valve seat and drops each time air flows into the valve chamber after exhausting at the beginning of water flow is completed. As a result, the air in the pipe flowing into the valve chamber from the inlet can be exhausted from the small diameter valve seat to the outlet through the hole between the inner periphery of the float receiver and the outer periphery of the float.

本発明は、フロートの上方にフロート受けの内周面を摺接して弁座に離着座する弁部材を配置したものである。そのため、外部空気が弁部材によってフロート下方のフロート受け内に流入し難くなる。そのため、外部空気がフロート受けの底部に当たって跳ね返ることが少なくなり、またフロート受け内のフロート下方の圧力が上昇し難くなる。そのため、フロートが浮き上がり難くなり、真空破壊能力が大きく速やかに真空破壊できる。 In the present invention, a valve member that slides in contact with an inner peripheral surface of a float receiver and is attached to and detached from a valve seat is disposed above the float. Therefore, it becomes difficult for external air to flow into the float receiver below the float by the valve member. For this reason, external air is less likely to bounce off the bottom of the float receiver, and the pressure below the float in the float receiver is unlikely to rise. Therefore, it becomes difficult for the float to float, and the vacuum breaking ability is large, so that the vacuum breaking can be performed quickly.

上記の技術的手段の具体例を示す実施例を説明する（図１参照）。本体１に蓋２をボルトで締結して内部に弁室３を有するケーシングを形成する。本体１の下部に流入口４を形成し、蓋２の上部に流出口５を形成する。蓋２に弁座６を間に挟んで取付部材７をネジで固定する。 An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid 2 is fastened to the main body 1 with a bolt to form a casing having a valve chamber 3 therein. An inlet 4 is formed in the lower part of the main body 1, and an outlet 5 is formed in the upper part of the lid 2. The attachment member 7 is fixed with screws with the valve seat 6 interposed between the lid 2 and the valve seat 6.

本体１は弁室３の内壁に内側に突出した複数のリブ９を一体に有し、リブ９の内側に有底のほぼ円筒形状のフロート受け１０をスナップリング１４で固定する。フロート受け１０はその底部に内外を連通する小さな開口面積の通孔１１を有する。フロート受け１０内に球形のフロート１２を自由状態で配置する。 The main body 1 integrally has a plurality of ribs 9 protruding inwardly on the inner wall of the valve chamber 3, and a bottomed substantially cylindrical float receiver 10 is fixed to the inside of the ribs 9 by a snap ring 14. The float receiver 10 has a through hole 11 having a small opening area communicating with the inside and the outside at the bottom. A spherical float 12 is placed in a free state in the float receiver 10.

フロート１２の上方に弁座６に離着座するキャップ状の弁部材１３を配置する。弁部材１３は外径がフロート受け１０の内径よりも僅かに小さく、外周縁がフロート受け１０の内周面を摺接する。フロート１２が離着座する小径弁座１５を弁部材１３の中央に形成する。 A cap-shaped valve member 13 that is attached to and detached from the valve seat 6 is disposed above the float 12. The valve member 13 has an outer diameter slightly smaller than the inner diameter of the float receiver 10, and the outer peripheral edge is in sliding contact with the inner peripheral surface of the float receiver 10. A small diameter valve seat 15 on which the float 12 is seated is formed at the center of the valve member 13.

上記実施例の排気弁の動作は下記の通りである。先ず配管に水を送り込むときにはフロート１２は降下してフロート受け１０の底壁に載り、弁部材１３が弁座６から離座した開弁状態である。これにより、流入口４から弁室３内に流入してくる配管内の空気をリブ９の間の空間からフロート受け１０上端を通して、及び通孔１１からフロート受け１０内周とフロート１０外周との間を介してフロート受け１０内周と弁部材１３外周との間を通して弁座６から流出口５に排気する。 The operation of the exhaust valve of the above embodiment is as follows. First, when water is fed into the pipe, the float 12 descends and rests on the bottom wall of the float receiver 10 so that the valve member 13 is separated from the valve seat 6. As a result, the air in the pipe that flows into the valve chamber 3 from the inlet 4 passes through the upper end of the float receiver 10 from the space between the ribs 9 and between the inner periphery of the float receiver 10 and the outer periphery of the float 10 from the through hole 11. The air is exhausted from the valve seat 6 to the outlet 5 through the gap between the inner periphery of the float receiver 10 and the outer periphery of the valve member 13.

そして通水始めの排気が終わって配管内の水が流入口４から弁室３内に流入してくると、フロート１２はリブ９の間の空間からフロート受け１０上端を通して及び通孔１１を通してフロート受け１０内に流入する水によって浮上し、弁部材１３が弁座６に着座し閉弁する。これにより、水の漏出を防止する。その後、弁室３内に空気が流入してくる都度、フロート１２が小径弁座１５から離座して降下し、流入口４から弁室３内に流入してくる配管内の空気を通孔１１からフロート受け１０内周とフロート１０外周との間から小径弁座１５を通して弁座６から流出口５に排気する。また配管系の圧力が低下して真空状態となったときにはフロート１２が降下してフロート受け１０の底壁に載り、弁部材１３が弁座６から離座した開弁状態となる。これにより、流出口５から弁座６を通して弁室３内に流入してくる外部空気をフロート受け１０上端からリブ９の間の空間を通して、及びフロート受け１０内周と弁部材１３外周との間を介してフロート受け１０内周とフロート１０外周との間から通孔１１を通して流入口４から配管内に導入することにより真空状態を破壊する。このとき、外部空気が弁部材１３によってフロート１２下方のフロート受け１０内に流入し難いので、外部空気がフロート受け１０の底部に当たって跳ね返ることが少なくなり、またフロート受け１０内のフロート１２下方の圧力が上昇し難くなる。そのため、フロート１２が浮き上がり難くなり、真空破壊能力が大きく速やかに真空破壊できる。 Then, when the exhaust at the beginning of water flow is completed and the water in the pipe flows into the valve chamber 3 from the inlet 4, the float 12 floats from the space between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11. The valve member 13 is seated on the valve seat 6 and closed by the water flowing into the receptacle 10. This prevents leakage of water. Thereafter, each time air flows into the valve chamber 3, the float 12 moves away from the small-diameter valve seat 15 and descends, and the air in the pipe that flows into the valve chamber 3 from the inlet 4 passes through the hole. 11, the air is exhausted from the valve seat 6 to the outlet 5 through the small-diameter valve seat 15 between the inner periphery of the float receiver 10 and the outer periphery of the float 10. When the pressure in the piping system is reduced to a vacuum state, the float 12 descends and rests on the bottom wall of the float receiver 10, and the valve member 13 is opened from the valve seat 6. Thereby, the external air flowing into the valve chamber 3 from the outlet 5 through the valve seat 6 passes through the space between the upper end of the float receiver 10 and the rib 9 and between the inner periphery of the float receiver 10 and the outer periphery of the valve member 13. The vacuum state is broken by introducing it into the pipe from the inlet 4 through the through hole 11 from between the inner periphery of the float receiver 10 and the outer periphery of the float 10. At this time, it is difficult for the external air to flow into the float receiver 10 below the float 12 by the valve member 13, so that the external air is less likely to bounce off the bottom of the float receiver 10 and the pressure below the float 12 in the float receiver 10. Becomes difficult to rise. Therefore, the float 12 is difficult to lift, and the vacuum breaking ability is large and the vacuum breaking can be performed quickly.

本発明の実施例の排気弁の断面図。Sectional drawing of the exhaust valve of the Example of this invention.

符号の説明Explanation of symbols

１本体
２蓋
３弁室
４流入口
５流出口
６弁座
９リブ
１０フロート受け
１１通孔
１２フロート
１３弁部材
１５小径弁座
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 6 Valve seat 9 Rib 10 Float receptacle 11 Through-hole 12 Float 13 Valve member 15 Small diameter valve seat

Claims

ケーシングで下部に流入口が開口し上部に流出口が開口した弁室を形成し、弁室と流出口の間に弁座を形成し、弁室内壁に内側に突出したリブを形成し、リブの内側に有底のほぼ円筒形状で底部に内外を連通する通孔を設けたフロート受けを固定し、フロート受け内に球形のフロートを自由状態で配し、フロートの上方にフロートの上部外表面に沿ってフロートの上部外表面を覆いフロートの直径以上の外径に形成した下端外周縁がフロート受けの内周面を摺接して弁座に離着座する弁部材を配置し、フロートの外表面がフロート受けの内周面を摺接することなく弁部材の下端外周縁がフロート受けの内周面を摺接し、フロートが離着座する小径弁座を弁部材に形成したことを特徴とする排気弁。 In the casing, a valve chamber is formed with an inlet opening at the bottom and an outlet opening at the top, a valve seat is formed between the valve chamber and the outlet, and a rib protruding inward is formed on the valve chamber wall. A float receiver with a bottomed, almost cylindrical shape with a through hole communicating inside and outside is fixed inside, and a spherical float is placed in the float receiver in a free state, and the upper outer surface of the float above the float A valve member that covers the upper outer surface of the float and that has an outer diameter that is equal to or larger than the diameter of the float and that slides on the inner peripheral surface of the float receiver and that is attached to and detached from the valve seat is disposed on the outer surface of the float. An exhaust valve characterized in that the valve member is formed with a small-diameter valve seat on which the outer peripheral edge of the lower end of the valve member slidably contacts the inner peripheral surface of the float receiver without sliding on the inner peripheral surface of the float receiver. .