JP5329371B2

JP5329371B2 - Check valve

Info

Publication number: JP5329371B2
Application number: JP2009260479A
Authority: JP
Inventors: 匡章隈元
Original assignee: Tlv Co Ltd
Current assignee: Tlv Co Ltd
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2013-10-30
Anticipated expiration: 2029-11-13
Also published as: JP2011106528A

Description

本発明は液体や気体などの流体配管に取り付けて、流体の入口から出口への順方向の流れは許容するが、その逆方向すなわち出口から入口への流れは阻止する逆止弁に関し、特に弁体を環状弁座へ付勢するコイルバネを設けたものに関する。 The present invention relates to a check valve which is attached to a fluid pipe such as liquid or gas and allows a forward flow of fluid from the inlet to the outlet, but prevents the flow in the reverse direction, that is, the flow from the outlet to the inlet. The present invention relates to a structure provided with a coil spring for urging the body toward an annular valve seat.

従来の逆止弁は、例えば特許文献１に開示されている。これは、弁ケーシングで入口と弁室と出口を形成し、入口と弁室の間に環状弁座を設け、弁室内に環状弁座を開閉する弁体を配置し、弁体の出口面に出口側弁棒を突設し、上下方向に一文字に伸びるバネ受けと弁体の間に弁体を環状弁座へ付勢するコイルバネを設けたものである。入口の流体圧力が出口の流体圧力及びコイルバネの付勢力よりも大きくなると、弁体がコイルバネを圧縮して環状弁座から離座し、入口の流体が弁体の外周を通って出口に流れる。入口の流体圧力が出口の流体圧力及びコイルバネの付勢力よりも小さくなると、弁体が入口側に変位して環状弁座に着座し、出口から入口への流体の逆流を防止する。 A conventional check valve is disclosed in Patent Document 1, for example. The valve casing forms an inlet, a valve chamber, and an outlet. An annular valve seat is provided between the inlet and the valve chamber. A valve body that opens and closes the annular valve seat is disposed in the valve chamber. An outlet side valve rod is provided in a projecting manner, and a coil spring for biasing the valve element toward the annular valve seat is provided between a spring receiver and a valve element extending in a vertical direction. When the inlet fluid pressure becomes larger than the outlet fluid pressure and the biasing force of the coil spring, the valve body compresses the coil spring and moves away from the annular valve seat, and the inlet fluid flows to the outlet through the outer periphery of the valve body. When the fluid pressure at the inlet becomes smaller than the fluid pressure at the outlet and the biasing force of the coil spring, the valve body is displaced toward the inlet and is seated on the annular valve seat, thereby preventing the backflow of fluid from the outlet to the inlet.

特開２００４−１０８４０９JP 2004-108409 A

上記従来の逆止弁は、流体配管に取り付ける前に不用意に落下させたりして衝撃が与えられると、バネ受けの入口面側に位置するコイルバネのバネ受け側端がバネ受けの出口面側に変位してバネ受けに巻き付いてしまうという問題点があった。 When the above conventional check valve is accidentally dropped before being attached to the fluid piping and is subjected to an impact, the spring receiving side end of the coil spring located on the inlet surface side of the spring receiver is the outlet surface side of the spring receiver There was a problem that it was displaced to wind around the spring receiver.

したがって本発明が解決しようとする課題は、コイルバネのバネ受け側端がバネ受けの出口面側に変位してバネ受けに巻き付いてしまうことを防止できる逆止弁を提供することである。 Therefore, the problem to be solved by the present invention is to provide a check valve capable of preventing the spring receiving side end of the coil spring from being displaced toward the outlet face side of the spring receiving and being wound around the spring receiving.

上記の課題を解決するために、本発明の逆止弁は、弁ケーシングで入口と弁室と出口を形成し、入口と弁室の間に環状弁座を設け、弁室内に環状弁座を開閉する弁体を配置し、弁体の出口面に出口側弁棒を突設し、上下方向に一文字に伸びるバネ受けと弁体の間に弁体を環状弁座へ付勢するコイルバネを設けたものにおいて、バネ受けの入口面側に位置するコイルバネのバネ受け側端にバネ受けの右側から左端部まで延びる突出部を形成したことを特徴とするものである。 In order to solve the above-described problems, the check valve of the present invention forms an inlet, a valve chamber, and an outlet in a valve casing, and provides an annular valve seat between the inlet and the valve chamber. A valve body that opens and closes is arranged, an outlet-side valve stem projects from the outlet face of the valve body, and a coil spring that biases the valve body to the annular valve seat is provided between the spring receiver that extends in a vertical direction and the valve body In this case, a protrusion extending from the right side to the left end of the spring receiver is formed at the spring receiver side end of the coil spring located on the inlet face side of the spring receiver.

本発明によれば、バネ受けの入口面側に位置するコイルバネのバネ受け側端にバネ受けの右側から左端部まで延びる突出部を形成したことにより、落下等による衝撃を受けても、コイルバネの突出部の一部をバネ受けの幅の内側に位置させることができ、コイルバネのバネ受け側端がバネ受けの出口面側に変位してバネ受けに巻き付いてしまうことを防止できるという効果を奏する。 According to the present invention, the protrusion extending from the right side to the left end of the spring receiver is formed on the spring receiver side end of the coil spring located on the inlet face side of the spring receiver, so that even if the coil spring receives an impact due to dropping or the like, A part of the protruding portion can be positioned inside the width of the spring receiver, and it is possible to prevent the end of the coil spring on the spring receiver side from being displaced toward the outlet face of the spring receiver and being wound around the spring receiver. .

本発明の実施の形態に係わる逆止弁の閉弁状態を示す断面図である。It is sectional drawing which shows the valve closing state of the non-return valve concerning embodiment of this invention. 本発明の実施の形態に係わる逆止弁の開弁状態を示す断面図である。It is sectional drawing which shows the valve opening state of the non-return valve concerning embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG.

以下、本発明の実施の形態について、図１乃至図４を参照して説明する。本実施例の弁ケーシング１は、図示しない入口側配管フランジと出口側配管フランジの間に配置されボルトとナットからなる締結手段によって挟持されるものである。弁ケーシング１に入口２と、入口２よりも大径の弁室３と、出口４を形成し、入口２と弁室３の間に環状弁座５を設ける。入口２と弁室３と出口４と環状弁座５を同軸上に形成する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. The valve casing 1 of this embodiment is disposed between an inlet side piping flange and an outlet side piping flange (not shown) and is sandwiched by fastening means including bolts and nuts. An inlet 2, a valve chamber 3 having a diameter larger than that of the inlet 2, and an outlet 4 are formed in the valve casing 1, and an annular valve seat 5 is provided between the inlet 2 and the valve chamber 3. The inlet 2, the valve chamber 3, the outlet 4, and the annular valve seat 5 are formed on the same axis.

環状弁座５の出口４側に環状弁座５を開閉する弁体６を配置する。弁体６は、その入口面から突出させて設けた弁棒７と出口面から突出させて設けた出口側弁棒８を一体に有する。入口２の内壁から弁室３内に突出する２本のリブ９，１０を弁ケーシング１に一体に形成する。リブ９，１０の内端に、弁棒７の外周が摺動するガイド孔１１を有するガイド部材１２を一体に形成する。ガイド部材１２のガイド孔１１は入口２と同軸上に形成する。リブ９，１０の内端側とガイド部材１２は弁室３内に位置する。弁体６は、その中央を出口４側に湾曲させて、弁室３側に突出するリブ９，１０とガイド部材１２を閉弁時に収容する窪み部２０を形成する。 A valve body 6 for opening and closing the annular valve seat 5 is disposed on the outlet 4 side of the annular valve seat 5. The valve body 6 integrally has a valve rod 7 provided so as to protrude from the inlet surface and an outlet side valve rod 8 provided so as to protrude from the outlet surface. Two ribs 9 and 10 projecting from the inner wall of the inlet 2 into the valve chamber 3 are formed integrally with the valve casing 1. A guide member 12 having a guide hole 11 on which the outer periphery of the valve stem 7 slides is integrally formed at the inner ends of the ribs 9 and 10. The guide hole 11 of the guide member 12 is formed coaxially with the inlet 2. The inner end sides of the ribs 9 and 10 and the guide member 12 are located in the valve chamber 3. The center of the valve body 6 is curved toward the outlet 4 side to form a recess 20 that accommodates the ribs 9 and 10 protruding toward the valve chamber 3 and the guide member 12 when the valve is closed.

弁室３の内壁に２本のリブ１３，１４を弁ケーシング１に一体に形成する。リブ１３，１４に形成した溝１５，１６に、出口側弁棒８の外周が摺動するガイド孔１７を有するバネ受け１８の両端を嵌め込み、バネ受け１８を弁ケーシング１に取り付ける。バネ受け１８のガイド孔１７は入口２と同軸上に形成する。バネ受け１８は上下方向に一文字に伸び、弁体６との間に弁体６を環状弁座５へ付勢するコイルバネ１９を設ける。バネ受け１８は上部と下部に折り曲げて弁体６側に突出させた上突出部２１と下突出部２２を有し、上突出部２１の上端と下突出部２２の下端がリブ１３側とリブ１４側に曲がった形状である。上突出部２１と下突出部２２はコイルバネ１９の外周の上部と下部を緩く保持する。バネ受け１８の入口面側に位置するコイルバネ１９のバネ受け１８側端にバネ受け１８の右側から左端部まで延びる突出部２３を形成する。落下等による衝撃を受けても、コイルバネ１９の突出部２３の一部をバネ受け１８の幅の内側に位置させることができ、コイルバネ１９のバネ受け１８側端がバネ受け１８の出口面側に変位してバネ受け１８に巻き付いてしまうことを防止できる。 Two ribs 13 and 14 are formed integrally with the valve casing 1 on the inner wall of the valve chamber 3. Both ends of a spring receiver 18 having guide holes 17 on which the outer periphery of the outlet side valve stem 8 slides are fitted into grooves 15 and 16 formed in the ribs 13 and 14, and the spring receiver 18 is attached to the valve casing 1. The guide hole 17 of the spring receiver 18 is formed coaxially with the inlet 2. The spring receiver 18 extends in a single letter in the vertical direction, and a coil spring 19 that biases the valve body 6 toward the annular valve seat 5 is provided between the spring receiver 18 and the valve body 6. The spring receiver 18 has an upper protruding portion 21 and a lower protruding portion 22 that are bent upward and downward and protruded toward the valve body 6, and the upper end of the upper protruding portion 21 and the lower end of the lower protruding portion 22 are the rib 13 side and the rib. The shape is bent to the 14th side. The upper protrusion 21 and the lower protrusion 22 hold the upper and lower portions of the outer periphery of the coil spring 19 loosely. A protrusion 23 extending from the right side to the left end of the spring receiver 18 is formed at the end of the coil spring 19 located on the inlet face side of the spring receiver 18. Even if an impact due to dropping or the like is received, a part of the protruding portion 23 of the coil spring 19 can be positioned inside the width of the spring receiver 18, and the end of the coil spring 19 on the spring receiver 18 side is on the outlet surface side of the spring receiver 18. Displacement and winding around the spring receiver 18 can be prevented.

入口２の流体圧力が出口４よりも高くなると、弁体６はコイルばね１９の付勢力に抗して出口４側に変位し、入口４の流体がリブ９，１０とガイド部材１２の周囲から弁体６の周囲を通って出口４に流れる。リブ９，１０の内端側とガイド部材１２が入口２よりも大径の弁室３内に位置するので、リブ９，１０とガイド部材１２の周囲の流体通過面積が大きく、流量が多くなる。出口４の流体圧力が入口２よりも高くなると、弁体６は流体圧力とコイルばね１９の作用を受けて、入口２側に変位して環状弁座５に機密的に接し、逆流を防止する。 When the fluid pressure at the inlet 2 becomes higher than that at the outlet 4, the valve body 6 is displaced toward the outlet 4 against the urging force of the coil spring 19, and the fluid at the inlet 4 flows from the periphery of the ribs 9, 10 and the guide member 12. It flows to the outlet 4 through the periphery of the valve body 6. Since the inner end side of the ribs 9 and 10 and the guide member 12 are located in the valve chamber 3 having a larger diameter than the inlet 2, the fluid passage area around the ribs 9 and 10 and the guide member 12 is large, and the flow rate is increased. . When the fluid pressure at the outlet 4 becomes higher than that at the inlet 2, the valve body 6 receives the fluid pressure and the action of the coil spring 19 and is displaced to the inlet 2 side to contact the annular valve seat 5 secretly, thereby preventing backflow. .

本発明は、弁体を環状弁座へ付勢するコイルバネを設け、流体の入口から出口への順方向の流れは許容するが、その逆方向の流れは阻止する逆止弁に利用することができる。 The present invention is provided with a coil spring that urges the valve body toward the annular valve seat, and allows the fluid to flow in the forward direction from the inlet to the outlet, but can be used as a check valve that blocks the reverse flow. it can.

１弁ケーシング
２入口
３弁室
４出口
５環状弁座
６弁体
８出口側弁棒
１８バネ受け
１９コイルバネ
２１上突出部
２２下突出部
２３突出部 DESCRIPTION OF SYMBOLS 1 Valve casing 2 Inlet 3 Valve chamber 4 Outlet 5 Annular valve seat 6 Valve body 8 Outlet side valve rod 18 Spring receiver 19 Coil spring 21 Upper protrusion 22 Lower protrusion 23 Projection

Claims

The valve casing forms an inlet, a valve chamber, and an outlet. An annular valve seat is provided between the inlet and the valve chamber. A valve body that opens and closes the annular valve seat is disposed in the valve chamber. A coil spring spring receiver located on the inlet face side of the spring holder, in which a rod is protruded and a coil spring for urging the valve element to the annular valve seat is provided between the spring holder and the valve element extending vertically. A check valve characterized in that a protrusion extending from the right side of the spring receiver to the left end is formed at the side end.