JP5394103B2 - Check valve - Google Patents
Check valve Download PDFInfo
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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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- valve
- holding portion
- inlet
- annular
- valve seat
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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
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.
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
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
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
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
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
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2009062532A JP5394103B2 (en) | 2009-03-16 | 2009-03-16 | Check valve |
Applications Claiming Priority (1)
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JP2009062532A JP5394103B2 (en) | 2009-03-16 | 2009-03-16 | Check valve |
Publications (2)
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JP2010216539A JP2010216539A (en) | 2010-09-30 |
JP5394103B2 true JP5394103B2 (en) | 2014-01-22 |
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JP2009062532A Expired - Fee Related JP5394103B2 (en) | 2009-03-16 | 2009-03-16 | Check valve |
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Family Cites Families (4)
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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2009
- 2009-03-16 JP JP2009062532A patent/JP5394103B2/en not_active Expired - Fee Related
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JP2010216539A (en) | 2010-09-30 |
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