JP2014074418A

JP2014074418A - Check valve

Info

Publication number: JP2014074418A
Application number: JP2012220534A
Authority: JP
Inventors: Masahisa Hiroya; 昌久広谷
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2012-10-02
Filing date: 2012-10-02
Publication date: 2014-04-24

Abstract

PROBLEM TO BE SOLVED: To provide a check valve capable of preventing attachment and accumulation of foreign matters such as dust and scale in a liquid flowing down from an inlet to an outlet when a spherical float is separated from a valve seat and lowered to open a valve port, to an outer surface of the spherical float.SOLUTION: A valve casing is formed of a body 1 and a cover 2. An inlet 4 is formed on an upper portion of the cover 2, an outlet 5 is formed at a lower portion coaxially to the inlet 4, and a valve chest 3 is formed between the inlet 4 and the outlet 5. A valve seat 7 having a valve port 6 communicating the inlet 4 with the valve chest 3, and coaxial with the inlet 4 and the outlet 5, is disposed between the inlet 4 and the valve chest 3. A spherical float 9 which sits on or separates from the valve seat 7 to close or opens the valve port 6, is disposed in the valve chest 3. A rib 10 for guiding the spherical float 9 to the valve portion 6 when the spherical float 9 is floated up, is disposed on an inner wall of the valve chest 3. The rib 10 guides the spherical float 9 to a lower outer portion of the valve portion 6 when the spherical float 9 is separated from the valve seat 7 and lowered.

Description

本発明は流体配管に取り付けて、液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する。 The present invention relates to a check valve which is attached to a fluid piping and allows a forward flow of liquid from the inlet to the outlet, but prevents the flow in the reverse direction, that is, from the outlet to the inlet.

従来の逆止弁は、弁ケーシングの上部に入口を、下部に入口と同一軸上の出口を、入口と出口の間に弁室を形成し、入口と弁室の間に入口と弁室を連通する入口と出口と同一軸上の弁口を有する弁座を設け、弁座に離着座して弁口を開閉する球形フロートを弁室に配置し、球形フロートを弁口に案内するリブを弁室内壁に設け、球形フロートが弁座から離座し降下して弁口を開口することにより入口から出口への液体の流れを許容し球形フロートが浮上し弁座に着座して弁口を閉口することにより出口から入口への液体の流れを阻止するものである。 A conventional check valve forms an inlet at the upper part of the valve casing, an outlet on the same axis as the inlet, a valve chamber between the inlet and the outlet, and an inlet and a valve chamber between the inlet and the valve chamber. A valve seat having a valve port on the same axis as the communicating inlet and outlet is provided, and a spherical float that opens and closes the valve seat to open and close the valve port is disposed in the valve chamber, and a rib that guides the spherical float to the valve port is provided. The spherical float floats away from the valve seat and descends to open the valve port by allowing the liquid to flow from the inlet to the outlet, allowing the spherical float to rise and seat on the valve seat. By closing, the flow of liquid from the outlet to the inlet is prevented.

特許第２９１６７３３号Japanese Patent No. 2916733

上記従来の逆止弁は、球形フロートが弁座から離座し降下して弁口を開口しているときに入口から出口へ流下する液体中のゴミやスケール等の異物が球形フロートの外表面に付着堆積するために、球形フロートが浮上し弁座に着座して弁口を閉口するときに弁口を完全閉口できなくなり液体を出口に漏出するという問題点があった。 The above-mentioned conventional check valve is configured such that when the spherical float is separated from the valve seat and descends to open the valve port, foreign matters such as dust and scale flowing in the liquid flowing from the inlet to the outlet are on the outer surface of the spherical float. Therefore, when the spherical float floats up and sits on the valve seat and closes the valve port, the valve port cannot be completely closed and liquid leaks to the outlet.

解決しようとする課題は、球形フロートが弁座から離座し降下して弁口を開口しているときに入口から出口へ流下する液体中のゴミやスケール等の異物が球形フロートの外表面に付着堆積すること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 that foreign matters such as dust and scales flowing down from the inlet to the outlet when the spherical float is separated from the valve seat and descends to open the valve port, are on the outer surface of the spherical float. To provide a check valve capable of preventing adhesion and deposition.

上記の課題を解決するために、本発明の逆止弁は、弁ケーシングの上部に入口を、下部に入口と同一軸上の出口を、入口と出口の間に弁室を形成し、入口と弁室の間に入口と弁室を連通する入口と出口と同一軸上の弁口を有する弁座を設け、弁座に離着座して弁口を開閉する球形フロートを弁室に配置し、球形フロートが浮上するときに球形フロートを弁口に案内するリブを弁室内壁に設け、球形フロートが弁座から離座し降下して弁口を開口することにより入口から出口への液体の流れを許容し球形フロートが浮上し弁座に着座して弁口を閉口することにより出口から入口への液体の流れを阻止するものにおいて、球形フロートが浮上するときに球形フロートを弁口に案内するリブは球形フロートが弁座から離座し降下するときに球形フロートを弁口の下方外部に案内することを特徴とするものである。 In order to solve the above problems, the check valve of the present invention has an inlet formed in the upper part of the valve casing, an outlet on the same axis as the inlet formed in the lower part, and a valve chamber formed between the inlet and the outlet. A valve seat having a valve port on the same axis as the inlet and the outlet communicating with the inlet and the valve chamber is provided between the valve chambers, and a spherical float that opens and closes the valve seat and opens and closes the valve port is disposed in the valve chamber. A rib that guides the spherical float to the valve opening when the spherical float rises is provided on the valve chamber wall, and the spherical float moves away from the valve seat and descends to open the valve opening, so that the liquid flows from the inlet to the outlet. The spherical float rises, sits on the valve seat and closes the valve port to prevent the liquid flow from the outlet to the inlet. When the spherical float rises, the spherical float is guided to the valve port. The ribs are spherical when the spherical float is lifted away from the valve seat. It is characterized in that to guide the door downwardly outside of the valve port.

本発明は、球形フロートが浮上するときに球形フロートを弁口に案内するリブは球形フロートが弁座から離座し降下するときに球形フロートを弁口の下方外部に案内するものであるので、球形フロートが弁座から離座し降下して弁口を開口しているときに入口から出口へ流下する液体中のゴミやスケール等の異物が球形フロートの外表面に付着堆積することを防止でき、球形フロートが浮上し弁座に着座して弁口を閉口するときに弁口を完全閉口できるという優れた効果を生じる。 Since the rib for guiding the spherical float to the valve mouth when the spherical float rises, the present invention guides the spherical float to the lower outside of the valve mouth when the spherical float moves away from the valve seat and descends. When the spherical float is separated from the valve seat and descends to open the valve port, foreign matter such as dust and scales flowing down from the inlet to the outlet can be prevented from adhering to the outer surface of the spherical float. When the spherical float rises and sits on the valve seat and closes the valve opening, the valve opening can be completely closed.

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及び図２を参照して説明する。本体１に蓋２をボルトで締結して内部に弁室３を有する弁ケーシングを形成する。蓋２の上部に弁室３に連通する垂直方向に開口した入口４を形成し、本体１の下部に弁室３から連通する垂直方向に開口した出口５を形成する。蓋２に入口４と弁室３を連通する弁口６を有する弁座７を間に挟んで取付部材８をネジで固定する。入口４と出口５と弁口６は同一軸上に形成する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. A lid 2 is fastened to the main body 1 with a bolt to form a valve casing having a valve chamber 3 therein. A vertically opened inlet 4 communicating with the valve chamber 3 is formed in the upper part of the lid 2, and a vertically opened outlet 5 communicating with the valve chamber 3 is formed in the lower part of the main body 1. The attachment member 8 is fixed with a screw with a valve seat 7 having a valve port 6 communicating with the inlet 4 and the valve chamber 3 interposed therebetween. The inlet 4, the outlet 5 and the valve port 6 are formed on the same axis.

弁座７に離着座して弁口６を開閉する球形フロート９を弁室３に自由状態で配置する。本体１は弁室３の内壁に内側に突出したリブ１０を一体に有する。リブ１０は球形フロート９が浮上するときに球形フロート９を弁６口に案内し、球形フロート９が弁座７から離座し降下するときに球形フロート９を弁口６の下方外部に案内する。 A spherical float 9 that opens and closes on the valve seat 7 to open and close the valve port 6 is disposed in the valve chamber 3 in a free state. The main body 1 integrally has a rib 10 protruding inwardly on the inner wall of the valve chamber 3. The rib 10 guides the spherical float 9 to the valve 6 opening when the spherical float 9 rises, and guides the spherical float 9 to the lower outside of the valve opening 6 when the spherical float 9 moves away from the valve seat 7 and descends. .

球形フロート９が弁座７から離座し降下して弁口６を開口することにより入口４から出口５への液体の流れを許容し、球形フロート９が浮上し弁座７に着座して弁口６を閉口することにより出口５から入口４への液体の流れを阻止する。 The spherical float 9 moves away from the valve seat 7 and descends to open the valve port 6, thereby allowing liquid flow from the inlet 4 to the outlet 5, and the spherical float 9 is lifted and seated on the valve seat 7. By closing the mouth 6, the flow of liquid from the outlet 5 to the inlet 4 is prevented.

入口４から弁室３に液体が流入してくると、球形フロート９が弁座７から離座し降下して弁口６を開口することにより入口４から出口５への液体の流れを許容する。このとき、球形フロート９はリブ１０に案内されて弁口６の下方外部に位置し、入口４から出口５へ流下する液体中のゴミやスケール等の異物が外表面に付着堆積することを防止できる。出口５から弁室３に流体が流入してくると、球形フロート９が浮上し弁座７に着座して弁口６を閉口することにより出口５から入口４への液体の流れを阻止する。 When liquid flows into the valve chamber 3 from the inlet 4, the spherical float 9 separates from the valve seat 7 and descends to open the valve port 6, thereby allowing the liquid to flow from the inlet 4 to the outlet 5. . At this time, the spherical float 9 is guided by the rib 10 and is located outside the valve port 6 to prevent foreign matters such as dust and scale flowing in from the inlet 4 to the outlet 5 from adhering and accumulating on the outer surface. it can. When the fluid flows into the valve chamber 3 from the outlet 5, the spherical float 9 rises and sits on the valve seat 7 to close the valve port 6, thereby preventing the liquid flow from the outlet 5 to the inlet 4.

本発明は、液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利用することができる。 The present invention can be used in a check valve that allows a forward flow of liquid from the inlet to the outlet, but prevents the reverse direction, ie, the flow from the outlet to the inlet.

１本体
２蓋
３弁室
４入口
５出口
６弁口
７弁座
８取付部材
９球形フロート
１０リブ 1 Body 2 Lid 3 Valve Chamber 4 Inlet 5 Outlet 6 Valve Port 7 Valve Seat 8 Mounting Member 9 Spherical Float 10 Rib

Claims

The upper part of the valve casing has an inlet, the lower part has an outlet on the same axis as the inlet, a valve chamber is formed between the inlet and the outlet, and the inlet and outlet communicate with each other between the inlet and the valve chamber. A valve seat having a valve port on the shaft is provided, a spherical float that opens and closes the valve seat and opens and closes the valve port is disposed in the valve chamber, and a rib that guides the spherical float to the valve port when the spherical float rises The spherical float floats away from the valve seat and descends to open the valve port by allowing the liquid to flow from the inlet to the outlet, allowing the spherical float to rise and seat on the valve seat. In order to prevent liquid flow from the outlet to the inlet by closing, the rib that guides the spherical float to the valve mouth when the spherical float rises, the spherical float when the spherical float moves away from the valve seat and descends Is guided to the outside of the valve port Check valve.