JP5394103B2 - Check valve - Google Patents

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JP5394103B2
JP5394103B2 JP2009062532A JP2009062532A JP5394103B2 JP 5394103 B2 JP5394103 B2 JP 5394103B2 JP 2009062532 A JP2009062532 A JP 2009062532A JP 2009062532 A JP2009062532 A JP 2009062532A JP 5394103 B2 JP5394103 B2 JP 5394103B2
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Prior art keywords
valve
holding portion
inlet
annular
valve seat
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JP2010216539A (en
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佳弘 西川
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Tlv Co Ltd
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Tlv Co Ltd
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Description

本発明は配管に取り付けて、流体の一方向の流れは許すが、その逆方向の流れは止める逆止弁に関する。 The present invention relates to a check valve which is attached to a pipe and allows a flow in one direction of a fluid but stops the flow in the opposite direction.

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部材を配置し、弁部材が環状弁座に着座した閉弁時に弁部材を受止める保持部を環状弁座に一体に設けたものである。この逆止弁は入口の流体圧力が出口よりも高くなると、弁部材は環状弁座から離座して出口側に変位し、入口の流体が弁部材の周囲を通って出口に流れる。出口の流体圧力が入口よりも高くなると、弁部材は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. In the valve casing, an inlet, a valve chamber, and an outlet are formed. An annular valve seat is provided between the inlet and the valve chamber. A valve member that opens and closes the annular valve seat is disposed in the valve chamber. A holding portion that receives the valve member when the valve is seated on the annular valve seat is provided integrally with the annular valve seat. In this check valve, when the fluid pressure at the inlet becomes higher than that at the outlet, the valve member is separated from the annular valve seat and displaced toward the outlet side, and the fluid at the inlet flows to the outlet through the periphery of the valve member. When the fluid pressure at the outlet becomes higher than that at the inlet, the valve member is displaced toward the inlet and is seated on the annular valve seat to prevent backflow of fluid from the outlet to the inlet.

特開２００４−１３８０８４号公報JP 2004-138084 A

上記従来の逆止弁は、弁部材が環状弁座に着座した閉弁時に弁部材を受止める保持部を環状弁座に一体に設けたものであるので、閉弁時にウォーターハンマー等による衝撃を受けても、弁部材が保持部に受止められて環状弁座に食い込むような変形が防止されるものである。しかしながら、上記従来の逆止弁は、保持部を環状弁座と一体に形成したものであるので、弁部材が環状弁座に着座した閉弁時に弁部材が保持部に当接するように環状弁座と保持部を形成することが困難であり、保持部が環状弁座よりも弁部材側に位置していると弁部材が環状弁座に着座することができず、環状弁座が保持部よりも弁部材側に位置している弁部材が環状弁座に着座した閉弁時に保持部が弁部材を受止めることができないという問題点があった。 The conventional check valve is provided with a holding portion for integrally receiving the valve member when the valve member is seated on the annular valve seat, so that an impact by a water hammer or the like is applied when the valve is closed. Even if it is received, deformation such that the valve member is received by the holding portion and bites into the annular valve seat is prevented. However, since the conventional check valve is formed by integrally forming the holding portion with the annular valve seat, the annular valve is arranged such that the valve member comes into contact with the holding portion when the valve member is seated on the annular valve seat. It is difficult to form the seat and the holding portion, and if the holding portion is positioned on the valve member side with respect to the annular valve seat, the valve member cannot be seated on the annular valve seat, and the annular valve seat becomes the holding portion. When the valve member positioned on the valve member side is closed on the annular valve seat, the holding portion cannot receive the valve member.

したがって本発明が解決しようとする課題は、弁部材が環状弁座に着座した閉弁時に保持部が弁部材を確実に受止めることが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 in which the holding portion can reliably receive the valve member when the valve member is closed on the annular valve seat.

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部材を配置し、弁部材が環状弁座に着座した閉弁時に弁部材を受止める保持部を環状弁座に設けたものにおいて、保持部を環状弁座とは別体に形成し、保持部を弁部材側に前進せしめるバネを設け、保持部を後退せしめて弁部材が環状弁座に着座し閉弁する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 member that opens and closes is arranged, and a holding part that receives the valve member when the valve member is seated on the annular valve seat is provided on the annular valve seat, and the holding part is formed separately from the annular valve seat. A spring for advancing the holding portion toward the valve member is provided, and the holding member is moved backward to seat the valve member on the annular valve seat and close the valve.

本発明によれば、保持部を環状弁座とは別体に形成し、保持部を弁部材側に前進せしめるバネを設け、保持部を後退せしめて弁部材が環状弁座に着座し閉弁するものであるので、弁部材が保持部に当接した状態で環状弁座に着座し閉弁することができ、弁部材が環状弁座に着座した閉弁時に保持部が弁部材を確実に受止めることができるという効果を奏する。 According to the present invention, the holding portion is formed separately from the annular valve seat, the spring for moving the holding portion forward to the valve member side is provided, and the valve member is seated on the annular valve seat by moving the holding portion backward. Therefore, the valve member can be seated on the annular valve seat while the valve member is in contact with the holding portion, and the valve member can be closed. There is an effect that it can be received.

本発明の実施の形態に係わる逆止弁の断面図である。It is sectional drawing 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.

以下、本発明の実施の形態について、図１を参照して説明する。弁ケーシングは入口側部材１と出口側部材２をねじ結合して構成し、内部にほぼ円柱状の弁室３を形成する。入口側部材１に入口４を形成し、出口側部材２に出口５を形成する。入口４と出口５は同一軸上に形成する。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. The valve casing is configured by screwing the inlet side member 1 and the outlet side member 2 and forms a substantially cylindrical valve chamber 3 therein. An inlet 4 is formed on the inlet side member 1, and an outlet 5 is formed on the outlet side member 2. The inlet 4 and the outlet 5 are formed on the same axis.

入口側部材１の弁室３側開口端に環状弁座６を形成する。環状弁座６は入口４及び出口５と同一軸上に形成する。弁室３内に球状の弁部材７を配置する。出口側部材２は弁室３の内側に突出した複数のリブ８を一体に有し、リブ８により弁部材７を環状弁座６に案内する。 An annular valve seat 6 is formed at the valve chamber 3 side opening end of the inlet side member 1. The annular valve seat 6 is formed on the same axis as the inlet 4 and the outlet 5. A spherical valve member 7 is disposed in the valve chamber 3. The outlet side member 2 integrally has a plurality of ribs 8 projecting inside the valve chamber 3, and guides the valve member 7 to the annular valve seat 6 by the ribs 8.

流出口５に図２に示すように十字状の保持部１３を設ける。保持部１３は環状弁座６を形成する入口側部材１とは別体に形成する。保持部１３は入口側部材１に固定したスナップリンク１４と保持部１３の右肩部１５の間に配置したコイルバネ１６により右方の弁部材７側に付勢して前進せしめ、保持部１３の左肩部１７により前進を制限する。保持部１３はその弁部材７側の右面を弁部材７の外表面に一致する部分球面状に形成する。弁部材７はその左方への変位により保持部１３の右面に当接して保持部１３を後退せしめ、二点鎖線で示すように保持部１３に当接した状態で環状弁座６に着座し閉弁する。そのため、弁部材７が環状弁座６に着座した閉弁時に保持部１３が弁部材７を確実に受止めることができる。 As shown in FIG. 2, a cross-shaped holding portion 13 is provided at the outlet 5. The holding portion 13 is formed separately from the inlet side member 1 that forms the annular valve seat 6. The holding portion 13 is urged toward the right valve member 7 by a coil spring 16 disposed between the snap link 14 fixed to the inlet side member 1 and the right shoulder 15 of the holding portion 13, and moves forward. The left shoulder 17 restricts advancement. The holding portion 13 is formed such that the right surface on the valve member 7 side is a partially spherical shape that coincides with the outer surface of the valve member 7. The valve member 7 abuts against the right surface of the holding portion 13 due to its leftward displacement to retract the holding portion 13, and is seated on the annular valve seat 6 in a state of being in contact with the holding portion 13 as indicated by a two-dot chain line. Close the valve. Therefore, the holding portion 13 can reliably receive the valve member 7 when the valve member 7 is seated on the annular valve seat 6.

上記の逆止弁の動作は次の通りである。通常は弁部材７が環状弁座６から離座して出口５側に変位し、入口４の流体が弁部材７の周囲を通って出口５に流れる。このとき保持部１３はコイルバネ１６の付勢力により左肩部１７がスナップリング１４に当接する位置まで右方に前進している。出口５の流体圧力が入口４の流体圧力よりも高くなると、弁部材７は入口４側に変位して保持部１３の右面に当接する。そして、出口５の流体圧力が入口４の流体圧力とコイルバネ１６の付勢力よりも高くなると、弁部材７はコイルバネ１６の付勢力に抗して保持部１３を後退せしめ、保持部１３に当接した状態で環状弁座６に着座し、出口５から入口４への流体の逆流を防止する。このとき、弁部材７は保持部１３で受止められるのでウォーターハンマー等による衝撃を受けても変形しない。 The operation of the check valve is as follows. Normally, the valve member 7 is separated from the annular valve seat 6 and displaced toward the outlet 5, and the fluid in the inlet 4 flows to the outlet 5 through the periphery of the valve member 7. At this time, the holding portion 13 is advanced to the right by the urging force of the coil spring 16 to the position where the left shoulder portion 17 contacts the snap ring 14. When the fluid pressure at the outlet 5 becomes higher than the fluid pressure at the inlet 4, the valve member 7 is displaced toward the inlet 4 and comes into contact with the right surface of the holding portion 13. When the fluid pressure at the outlet 5 becomes higher than the fluid pressure at the inlet 4 and the biasing force of the coil spring 16, the valve member 7 retracts the holding portion 13 against the biasing force of the coil spring 16 and contacts the holding portion 13. In this state, it is seated on the annular valve seat 6 to prevent backflow of fluid from the outlet 5 to the inlet 4. At this time, since the valve member 7 is received by the holding portion 13, it does not deform even if it receives an impact from a water hammer or the like.

本発明は配管に取り付けて、流体の一方向の流れは許すが、その逆方向の流れは止める逆止弁に利用することができる。 The present invention can be applied to a check valve which is attached to a pipe and allows a flow in one direction of the fluid but stops the flow in the opposite direction.

１ 入口側部材
２ 出口側部材
３ 弁室
４ 入口
５ 出口
６ 環状弁座
７ 弁部材
１３ 保持部
１６ コイルバネ DESCRIPTION OF SYMBOLS 1 Inlet side member 2 Outlet side member 3 Valve chamber 4 Inlet 5 Outlet 6 Annular valve seat 7 Valve member 13 Holding part 16 Coil spring

Claims (1)

弁ケーシングで入口と弁室と出口を形成し、前記入口と前記弁室の間に環状弁座を設け、前記弁室内に前記環状弁座を開閉する弁部材を配置し、前記弁部材が前記環状弁座に着座した閉弁時に前記弁部材を受止める保持部を前記環状弁座に設けたものにおいて、前記保持部を前記環状弁座とは別体に形成し、前記保持部を前記弁部材側に前進せしめるバネを設け、通常は前記弁部材が前記環状弁座から離座して前記出口側に変位し、前記出口の流体圧力が前記入口の流体圧力よりも高くなると前記弁部材が前記入口側に変位して前記弁部材側への前進を制限する左肩部を有する前記保持部に当接し、前記出口の流体圧力が前記入口の流体圧力と前記バネの付勢力よりも高くなると前記保持部を後退せしめて前記弁部材が前記環状弁座に着座し閉弁することを特徴とする逆止弁。 Forming an inlet and the valve chamber and the outlet in the valve housing, an annular valve seat disposed between the valve chamber and the inlet, a valve member for opening and closing the annular valve seat in the valve chamber is arranged, wherein the valve member is the in the holding portion which receives the valve member when the valve is closed seated on the annular valve seat which is provided on the annular valve seat, said retaining portion is formed separately from the said annular valve seat, said valve said holding portion a spring allowed to move forward in the member side is provided, usually displaced to the outlet side the valve member is unseated from the annular valve seat, said valve member and the fluid pressure is higher than the fluid pressure in the inlet of the outlet the inlet-side displacement to the contact with the holding portion having a left shoulder portion to limit the advancement of the valve member, the fluid pressure of the outlet is higher than the biasing force of the inlet fluid pressure and the spring It said valve member retracted the holding portion is seated on the annular valve seat A check valve, characterized in that the valve.
JP2009062532A 2009-03-16 2009-03-16 Check valve Expired - Fee Related JP5394103B2 (en)

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JP5394103B2 true JP5394103B2 (en) 2014-01-22

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5276888U (en) * 1975-12-05 1977-06-08
JP2577094Y2 (en) * 1991-10-31 1998-07-23 邦人 佐伯 Check valve structure in hydraulic circuit
JPH09166514A (en) * 1995-12-18 1997-06-24 Toyota Motor Corp Operation inspection device for opening/closing means
JP2004138084A (en) * 2002-10-15 2004-05-13 Tlv Co Ltd Check valve

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