JP5643586B2 - Check valve - Google Patents

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JP5643586B2
JP5643586B2 JP2010207326A JP2010207326A JP5643586B2 JP 5643586 B2 JP5643586 B2 JP 5643586B2 JP 2010207326 A JP2010207326 A JP 2010207326A JP 2010207326 A JP2010207326 A JP 2010207326A JP 5643586 B2 JP5643586 B2 JP 5643586B2
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disc
inlet
valve
valve seat
outlet
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JP2012062955A (en
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智行 藤田
智行 藤田
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TLV Co Ltd
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TLV Co Ltd
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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、特にディスク状弁体を環状弁座に案内する構造に関する。 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 for guiding a valve body to 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、環状弁座を開閉するディスク状弁体を弁室内に配置し、ディスク状弁体を環状弁座へ付勢するコイルバネを設け、ディスク状弁体の外周に突起を設け、ディスク状弁体外周の突起の外面が摺接する摺接円筒面を弁ケーシングの内周壁に形成したものである。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、ディスク状弁体がコイルバネを圧縮して環状弁座から離座し、入口の流体がディスク状弁体外周の突起の間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、ディスク状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 disc-shaped valve body that opens and closes the annular valve seat is disposed in the valve chamber. Is provided on the inner peripheral wall of the valve casing with a coil spring that biases the annular valve seat, a protrusion on the outer periphery of the disc-shaped valve body, and a sliding contact cylindrical surface on which the outer surface of the protrusion on the outer periphery of the disk-shaped valve body slides. is there. When the fluid pressure at the inlet becomes larger than the fluid pressure at the outlet and the biasing force of the coil spring, the disc-like valve body compresses the coil spring and moves away from the annular valve seat, and the inlet fluid is located between the protrusions on the outer circumference of the disc-like valve body. Flow through to the exit. 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 disc-shaped 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.

実開昭60−10964号公報Japanese Utility Model Publication No. 60-10964

上記従来の逆止弁は、ディスク状弁体が環状弁座に着座するときに傾いた状態で環状弁座に当接すると、ディスク状弁体外周の突起が弁ケーシング内周壁の摺接円筒面に引っ掛かるために、ディスク状弁体が環状弁座を完全閉止できず、出口から入口へ流体が漏れる問題点があった。 When the disc-shaped valve element is in contact with the annular valve seat in a tilted state when the disc-shaped valve element is seated on the annular valve seat, the protrusion on the outer periphery of the disc-shaped valve element causes the cylindrical surface of the valve casing inner wall to slide. Therefore, there is a problem that the disc-shaped valve body cannot completely close the annular valve seat and fluid leaks from the outlet to the inlet.

したがって本発明が解決しようとする課題は、ディスク状弁体が環状弁座に着座するときに傾いた状態で環状弁座に当接しても、ディスク状弁体が環状弁座を完全閉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 that the disc-shaped valve body can completely close the annular valve seat even if it contacts the annular valve seat in a tilted state when the disc-shaped valve seat is seated on the annular valve seat. Is to provide a stop valve.

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、環状弁座を開閉するディスク状弁体を弁室内に配置し、ディスク状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、ディスク状弁体の出口側面にガイド棒を形成し、ガイド棒の外周が摺接するガイド孔を弁ケーシングに形成し、ガイド棒の出口側端外周にR加工を施し、ガイド孔の入口側端内周にR加工を施し、ディスク状弁体が環状弁座に着座した位置でガイド棒のR加工を施した部位とガイド孔のR加工を施した部位とが嵌合することを特徴とする。 In order to solve the above problems, a check valve according to the present invention is a disc in which an inlet, a valve chamber, and an outlet are formed in a valve casing, an annular valve seat is provided between the inlet and the valve chamber, and the annular valve seat is opened and closed. The guide rod is formed on the outlet side of the disc-shaped valve body, and the outer periphery of the guide rod is slidably contacted with the disc-shaped valve disc disposed in the valve chamber and provided with a coil spring for biasing the disc-shaped valve disc to the annular valve seat. A guide hole is formed in the valve casing, R processing is performed on the outer periphery of the outlet end of the guide rod, R processing is performed on the inner periphery of the inlet end of the guide hole, and the guide is guided at the position where the disc-shaped valve body is seated on the annular valve seat. The portion of the rod subjected to R processing is fitted to the portion of the guide hole subjected to R processing.

本発明によれば、ディスク状弁体の出口側面にガイド棒を形成し、ガイド棒の外周が摺接するガイド孔を弁ケーシングに形成し、ガイド棒の出口側端外周にR加工を施し、ガイド孔の入口側端内周にR加工を施し、ディスク状弁体が環状弁座に着座した位置でガイド棒のR加工を施した部位とガイド孔のR加工を施した部位とが嵌合するものであるので、ディスク状弁体が弁座部材に当接した位置で四方八方に傾斜でき、ディスク状弁体が環状弁座に着座するときに傾いた状態で環状弁座に当接しても、ディスク状弁体が環状弁座を完全閉止でき、出口から入口へ流体が漏れることがないという優れた効果を生じる。 According to the present invention, the guide rod is formed on the outlet side surface of the disc-shaped valve body, the guide hole in which the outer periphery of the guide rod is slidably contacted is formed in the valve casing, the outer periphery of the guide rod on the outlet side end is subjected to R machining, R processing is performed on the inner periphery of the inlet side end of the hole, and the portion of the guide rod subjected to R processing and the portion of the guide hole subjected to R processing are fitted at the position where the disc-like valve body is seated on the annular valve seat. Therefore, the disc-shaped valve body can be tilted in all directions at the position where it abuts against the valve seat member, and even when the disc-shaped valve body is tilted when seated on the annular valve seat, The disc-shaped valve body can completely close the annular valve seat, and an excellent effect is obtained that fluid does not leak from the outlet to the inlet.

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.

入口1を有する入口側部材2と出口3を有する出口側部材4をねじ結合して入口1と出口3の間に弁室5を有する弁ケーシングを形成する。入口側部材2の内端に環状弁座6を形成する。環状弁座6を開閉するディスク状弁体7を弁室5内に配置する。ディスク状弁体7の出口3側面の中心にガイド棒8を形成する。出口側部材4にガイド部材9を一体に形成する。ガイド部材9は4本のリブ10を介して入口1と出口3の中心軸上にガイド孔11を開けたガイドリングを形成したもので、ガイド孔11の内周にディスク状弁体7のガイド棒8の外周が摺接する。ガイド棒8の外径はガイド孔11の内径よりも少し小さくしてガイド孔11に緩く摺接するようにする。ガイド部材9のリブ10に段部12を形成し、この段部12とディスク状弁体7の間にディスク状弁体7を環状弁座6へ付勢するコイルバネ13を配置する。リブ10に段部12の外方に段部14を形成し、この段部14によりディスク状弁体7の開弁方向への移動範囲を規制してコイルバネ13の過剰圧縮を防止する。 An inlet side member 2 having an inlet 1 and an outlet side member 4 having an outlet 3 are screwed together to form a valve casing having a valve chamber 5 between the inlet 1 and the outlet 3. An annular valve seat 6 is formed at the inner end of the inlet side member 2. A disc-shaped valve body 7 for opening and closing the annular valve seat 6 is disposed in the valve chamber 5. A guide rod 8 is formed at the center of the side surface of the outlet 3 of the disc-shaped valve body 7. A guide member 9 is formed integrally with the outlet side member 4. The guide member 9 is formed by forming a guide ring having a guide hole 11 formed on the central axis of the inlet 1 and the outlet 3 through four ribs 10. The guide member 9 guides the disc-shaped valve element 7 on the inner periphery of the guide hole 11. The outer periphery of the rod 8 is in sliding contact. The outer diameter of the guide bar 8 is made slightly smaller than the inner diameter of the guide hole 11 so as to come into sliding contact with the guide hole 11 loosely. A step portion 12 is formed on the rib 10 of the guide member 9, and a coil spring 13 for urging the disc-like valve body 7 toward the annular valve seat 6 is disposed between the step portion 12 and the disc-like valve body 7. A step portion 14 is formed outside the step portion 12 on the rib 10, and the step portion 14 restricts the range of movement of the disc-like valve body 7 in the valve opening direction, thereby preventing the coil spring 13 from being excessively compressed.

ディスク状弁体7のガイド棒8の出口3側端外周15にR加工を施す。ガイド部材9のガイド孔11の入口1側端内周16にR加工を施す。ディスク状弁体7が環状弁座6に着座した位置でガイド棒8のR加工を施した部位15とガイド孔11のR加工を施した部位16とが嵌合する。そのため、ディスク状弁体7は弁座部材6に当接した位置で四方八方に傾斜でき、ディスク状弁体7が環状弁座6に着座するときに傾いた状態で環状弁座6に当接しても、ディスク状弁体7が環状弁座6を完全閉止でき、出口3から入口1へ流体が漏れることがない。 R machining is performed on the outer periphery 15 on the outlet 3 side end of the guide rod 8 of the disc-shaped valve element 7. R machining is performed on the inner periphery 16 of the guide hole 11 of the guide member 9 on the inlet 1 side end. At the position where the disc-like valve body 7 is seated on the annular valve seat 6, the portion 15 where the guide rod 8 has been subjected to the R processing and the portion 16 where the guide hole 11 has been subjected to the R processing are fitted. Therefore, the disc-like valve body 7 can be tilted in all directions at the position where it abuts on the valve seat member 6, and abuts against the annular valve seat 6 in a tilted state when the disc-like valve body 7 is seated on the annular valve seat 6. However, the disc-like valve body 7 can completely close the annular valve seat 6, and fluid does not leak from the outlet 3 to the inlet 1.

次に本実施例の逆止弁1の作用について説明する。入口1から流体が流入してきてその流体圧力が出口3側の流体圧力及びコイルバネ13の付勢力よりも大きくなると、ディスク状弁体7がコイルバネ13を圧縮して環状弁座6から離座し、出口3側に変位してガイド部材9のリブ10の段部14に当たって止まる。これにより、入口1の流体がガイド部材9のリブ10の間を通って出口5に流れる。入口1の流体圧力が出口3の流体圧力及びコイルバネ8の付勢力よりも小さくなると、ディスク状弁体7が入口1側に変位して環状弁座6に着座し、出口3から入口1への流体の逆流を防止する。 Next, the operation of the check valve 1 of this embodiment will be described. When fluid flows in from the inlet 1 and the fluid pressure becomes larger than the fluid pressure on the outlet 3 side and the biasing force of the coil spring 13, the disc-shaped valve body 7 compresses the coil spring 13 and separates from the annular valve seat 6, It displaces to the exit 3 side and stops by hitting the step 14 of the rib 10 of the guide member 9. As a result, the fluid at the inlet 1 flows between the ribs 10 of the guide member 9 to the outlet 5. When the fluid pressure at the inlet 1 becomes smaller than the fluid pressure at the outlet 3 and the biasing force of the coil spring 8, the disc-like valve body 7 is displaced toward the inlet 1 and is seated on the annular valve seat 6. Prevent backflow of fluid.

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
2 入口側部材
3 出口
4 出口側部材
5 弁室
6 環状弁座
7 ディスク状弁体
8 ガイド棒
9 ガイド部材
10 リブ
11 ガイド孔
13 コイルバネ
15 ガイド棒の出口側端内周
16 ガイド孔の入口側端外周
DESCRIPTION OF SYMBOLS 1 Inlet 2 Inlet side member 3 Outlet 4 Outlet side member 5 Valve chamber 6 Annular valve seat 7 Disc-shaped valve body 8 Guide rod 9 Guide member 10 Rib 11 Guide hole 13 Coil spring 15 Outlet end inner periphery 16 of guide rod Inlet outer periphery

Claims (1)

弁ケーシングで入口と出口を形成するとともに、前記入口と前記出口の間に弁室を形成し、
前記入口と前記弁室の間に環状弁座を設け、
前記環状弁座を開閉するディスク状弁体を前記環状弁座の出口側の前記弁室内に配置し、
前記ディスク状弁体を前記環状弁座へ付勢するコイルバネを設け、
前記ディスク状弁体の出口側面にガイド棒を形成し、
前記ガイド棒の外周が摺接するガイド孔を前記ディスク状弁体の出口側の弁ケーシングに形成し、
前記ガイド棒の出口側端外周にR加工を施し、
前記ガイド孔の入口側端内周にR加工を施し、
前記ディスク状弁体が前記環状弁座に着座した位置で前記ガイド棒のR加工を施した部位と前記ガイド孔のR加工を施した部位とが嵌合すること
を特徴とする逆止弁。
Forming an inlet and an outlet in the valve casing, and forming a valve chamber between the inlet and the outlet ;
An annular valve seat disposed between the valve chamber and the inlet,
Place a disc shaped valve body for opening and closing the annular valve seat in the valve chamber on the outlet side of the annular valve seat,
Setting a coil spring which biases the disc-shaped valve body to said annular valve seat,
The guide rod is formed on the outlet side of the disc-shaped valve body,
A guide hole with which the outer periphery of the guide rod comes into sliding contact is formed in the valve casing on the outlet side of the disc-shaped valve body ,
Performing R processing on the outlet side end periphery of the guide rod,
Performing R processing in the peripheral inlet end of the guide hole,
A check valve and parts in which the disc-shaped valve body is subjected to R processing of the a portion subjected to R processing guide hole of the guide rod at a position seated on the annular valve seat, characterized in that the fitting.
JP2010207326A 2010-09-15 2010-09-15 Check valve Expired - Fee Related JP5643586B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010207326A JP5643586B2 (en) 2010-09-15 2010-09-15 Check valve

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Application Number Priority Date Filing Date Title
JP2010207326A JP5643586B2 (en) 2010-09-15 2010-09-15 Check valve

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JP2012062955A JP2012062955A (en) 2012-03-29
JP5643586B2 true JP5643586B2 (en) 2014-12-17

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JP2010207326A Expired - Fee Related JP5643586B2 (en) 2010-09-15 2010-09-15 Check valve

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6317187B2 (en) * 2014-06-10 2018-04-25 未来工業株式会社 Ventilation valve and piping structure
CN109185510A (en) * 2018-09-28 2019-01-11 安溪县斯马拓科技发展有限公司 A kind of dock straight check valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010964U (en) * 1983-06-30 1985-01-25 株式会社 テイエルブイ Disc type check valve
JP2555484Y2 (en) * 1991-07-15 1997-11-26 株式会社テイエルブイ Valve body guide structure of pressure reducing valve
KR19980014224U (en) * 1997-07-25 1998-06-05 백경태 Water Jet Loom Check Valve
US6988510B2 (en) * 2002-03-22 2006-01-24 Halkey-Roberts Corporation Disc check valve
JP2005233185A (en) * 2004-02-18 2005-09-02 Kyotai Haku Inlet/delivery valve for reciprocating pump of water jet weaving machine
JP5295861B2 (en) * 2009-05-15 2013-09-18 株式会社テイエルブイ Check valve

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