JP2006349039A

JP2006349039A - Check valve

Info

Publication number: JP2006349039A
Application number: JP2005175448A
Authority: JP
Inventors: Hideaki Yumoto; 秀昭湯本
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2005-06-15
Filing date: 2005-06-15
Publication date: 2006-12-28

Abstract

<P>PROBLEM TO BE SOLVED: To provide a check valve capable of preventing swing of a spherical valve element with an annular valve seat opened. <P>SOLUTION: An inlet 4, a valve chamber 3, and an outlet 5 are formed by a valve casing composed of a main body 1 and a lid member 2. The annular valve seat 6 is provided between the inlet 4 and the valve chamber 3. The spherical valve element 7 opening and closing the annular valve seat 6 is arranged in the valve chamber 3. A coil-like spring 8 for energizing the spherical valve element 7 onto the annular valve seat 6 is provided. The spherical valve element 7 is guided in the axial direction of the annular valve seat 6 by a cylindrical screen 9 having a side face having slightly larger inside diameter than outside diameter of the spherical valve element 7 and opening many filtration holes on the side face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は流体配管に取り付けて、内部に設けたばね付勢球状弁体により、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関する。 The present invention relates to a check valve that is attached to a fluid pipe and allows a forward flow from the inlet to the outlet of the fluid, but prevents the reverse flow by a spring-biased spherical valve provided inside.

従来のばね付勢球状弁体を用いた逆止弁の一例が特開昭６４−３５１８１号公報に示されている。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球状弁体を弁室内に配置し、球状弁体を環状弁座へ付勢するばねを設けたものである。 An example of a conventional check valve using a spring-biased spherical valve body is disclosed in Japanese Patent Application Laid-Open No. 64-35181. 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 spherical valve body that opens and closes the annular valve seat is disposed in the valve chamber. A spring that biases the valve seat is provided.

上記従来の逆止弁は、環状弁座を開放した球状弁体が出口へ流下する流体によって激しく揺動するために、弁室内壁に衝突して損傷したり大きな騒音を発生したりする問題点があった。
特開昭６４−３５１８１号公報 The conventional check valve has a problem in that the spherical valve body with the annular valve seat opened violently swings due to the fluid flowing down to the outlet, so that it collides with the valve chamber wall and damages or generates a large noise. was there.
Japanese Unexamined Patent Publication No. 64-35181

解決しようとする課題は、環状弁座を開放した球状弁体の揺動を防止できる逆止弁を提供することである。 The problem to be solved is to provide a check valve which can prevent the spherical valve body with the annular valve seat open.

本発明は、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球状弁体を弁室内に配置し、球状弁体を環状弁座へ付勢するばねを設け、球状弁体の外径よりも少し内径の大きな側面を有し該側面に多数の濾過孔を開口させた円筒状スクリーンで球状弁体を環状弁座の軸方向に案内したことを特徴とする。 In the present invention, 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, a spherical valve body that opens and closes the annular valve seat is disposed in the valve chamber, A spring for urging the annular valve seat is provided, and the spherical valve body is attached to the annular valve seat by a cylindrical screen having a side surface slightly larger in inner diameter than the outer diameter of the spherical valve body and having a large number of filtration holes opened on the side surface. It is characterized by being guided in the axial direction.

本発明は、球状弁体の揺動を円筒状スクリーンにより防止できるので、球状弁体の損傷や騒音の発生を防止できるという優れた効果を生じる。 According to the present invention, the spherical valve body can be prevented from swinging by the cylindrical screen, and therefore, an excellent effect that damage to the spherical valve body and generation of noise can be prevented is produced.

本発明は、球状弁体の外径よりも少し内径の大きな側面を有し該側面に多数の濾過孔を開口させた円筒状スクリーンで球状弁体を環状弁座の軸方向に案内したものである。そのため、球状弁体は円筒状スクリーンにより環状弁座の軸方向に案内され、出口へ流下する流体によって揺動することを防止できる。 In the present invention, a spherical valve body is guided in the axial direction of an annular valve seat by a cylindrical screen having a side surface slightly larger in inner diameter than the outer diameter of the spherical valve body and having a large number of filtration holes opened on the side surface. is there. For this reason, the spherical valve body is guided in the axial direction of the annular valve seat by the cylindrical screen, and can be prevented from swinging by the fluid flowing down to the outlet.

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）。弁ケーシングは本体１に蓋部材２をねじ結合して構成し、内部にほぼ円筒状の弁室３を形成する。本体１に入口４と入口４から直角方向に向いた出口５を形成する。 An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The valve casing is formed by screwing a lid member 2 to the main body 1 and forms a substantially cylindrical valve chamber 3 therein. The main body 1 is formed with an inlet 4 and an outlet 5 oriented perpendicularly from the inlet 4.

本体１の入口４の弁室３側開口端に環状弁座６を設ける。環状弁座６は入口４と同一軸上に形成する。弁室３内に球状弁体７を配置する。蓋体２と球状弁体７の間に球状弁体７を環状弁座６へ付勢するコイル状ばね８を設ける。球状弁体７の外径よりも少し内径の大きな側面を有し該側面に多数の濾過孔を開口させた円筒状スクリーン９を本体１と蓋体２の間に配置する。円筒状スクリーン９は球状弁体７及びコイル状ばね８を覆い、球状弁体７を環状弁座６の軸方向に案内する。 An annular valve seat 6 is provided at the valve chamber 3 side opening end of the inlet 4 of the main body 1. The annular valve seat 6 is formed on the same axis as the inlet 4. A spherical valve element 7 is arranged in the valve chamber 3. A coiled spring 8 that biases the spherical valve body 7 toward the annular valve seat 6 is provided between the lid body 2 and the spherical valve body 7. A cylindrical screen 9 having a side surface slightly larger in inner diameter than the outer diameter of the spherical valve body 7 and having a large number of filtration holes opened on the side surface is disposed between the main body 1 and the lid body 2. The cylindrical screen 9 covers the spherical valve body 7 and the coiled spring 8 and guides the spherical valve body 7 in the axial direction of the annular valve seat 6.

入口４の流体圧力が出口５の流体圧力及びコイル状ばね８の付勢力よりも大きくなると、球状弁体７がコイル状ばね８を圧縮して環状弁座６から離座し、円筒状スクリーン９により環状弁座６の軸方向に案内されて蓋部材２側に変位する。これにより、入口４の流体が出口５に流れる。入口４の流体圧力が出口５の流体圧力及びコイル状ばね８の付勢力よりも小さくなると、球状弁体７が円筒状スクリーン９により環状弁座６の軸方向に案内されて、コイル状ばね８の付勢力により入口４側に変位して環状弁座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。 When the fluid pressure at the inlet 4 becomes larger than the fluid pressure at the outlet 5 and the biasing force of the coiled spring 8, the spherical valve body 7 compresses the coiled spring 8 and separates from the annular valve seat 6, and the cylindrical screen 9. As a result, it is guided in the axial direction of the annular valve seat 6 and displaced toward the lid member 2 side. As a result, the fluid at the inlet 4 flows to the outlet 5. When the fluid pressure at the inlet 4 becomes smaller than the fluid pressure at the outlet 5 and the biasing force of the coiled spring 8, the spherical valve body 7 is guided in the axial direction of the annular valve seat 6 by the cylindrical screen 9, and the coiled spring 8. The urging force is displaced toward the inlet 4 and is seated on the annular valve seat 6 to prevent backflow of fluid from the outlet 5 to the inlet 4.

本発明の逆止弁の断面図。Sectional drawing of the non-return valve of this invention.

符号の説明Explanation of symbols

１本体
２蓋部材
３弁室
４入口
５出口
６環状弁座
７球状弁体
８コイル状ばね
９円筒状スクリーン
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Valve chamber 4 Inlet 5 Outlet 6 Annular valve seat 7 Spherical valve body 8 Coiled spring 9 Cylindrical screen

Claims

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球状弁体を弁室内に配置し、球状弁体を環状弁座へ付勢するばねを設け、球状弁体の外径よりも少し内径の大きな側面を有し該側面に多数の濾過孔を開口させた円筒状スクリーンで球状弁体を環状弁座の軸方向に案内したことを特徴とする逆止弁。
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 spherical valve body that opens and closes the annular valve seat is disposed in the valve chamber, and the spherical valve body is moved to the annular valve seat. A spring is provided to bias the spherical valve body in the axial direction of the annular valve seat with a cylindrical screen that has a slightly larger inner diameter than the outer diameter of the spherical valve body and has a large number of filtration holes on the side surface. Check valve characterized by that.