JP2011190888A - Relief valve - Google Patents

Relief valve Download PDF

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Publication number
JP2011190888A
JP2011190888A JP2010058454A JP2010058454A JP2011190888A JP 2011190888 A JP2011190888 A JP 2011190888A JP 2010058454 A JP2010058454 A JP 2010058454A JP 2010058454 A JP2010058454 A JP 2010058454A JP 2011190888 A JP2011190888 A JP 2011190888A
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valve
port
annular
inlet
outlet
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JP5552341B2 (en
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Tadaaki Kumamoto
匡章 隈元
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TLV Co Ltd
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TLV Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a relief valve capable of reducing noise caused by a valve element when repeatedly sitting on an annular valve seat. <P>SOLUTION: A valve chamber 3, which communicates an inflow port 4 with an outflow port 5, is formed in valve casings 1, 2 having the inflow port 4 and the outflow port 5 respectively. The annular valve seat 7 having a valve port 6 is provided between the inflow port 4 and the valve chamber 3. The valve element 9 of a disk shape, which opens and closes the valve port 6 by sitting on or separating from the annular valve seat 7, is arranged in the valve chamber 3. A cylinder 8 is provided which slidably guides the outer circumference of the valve element 9 in the axial direction of the valve port 6. Outflow windows 14, which are opened when the valve element 9 separates from the annular valve seat 7 and displaced in the valve-opening direction by a predetermined amount, is provided in the cylinder 8. The valve element 9 normally sits on the annular valve seat 7 to close the valve port 6. When the pressure of the inflow port 4 becomes higher than a set-up pressure value compared with the pressure of the outflow port 5, the valve element 9 separates from the annular valve seat 7 to open the valve port 6 and the valve element 9 is displaced in the valve-opening direction by the predetermined amount to open the outflow windows 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、流体配管や流体機器等の流体配管系に接続して流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると開弁するリリーフ弁に関し、特にハンチングによる騒音を防止できるものに関する。 The present invention relates to a relief valve that is connected to a fluid piping system such as a fluid piping or a fluid device and opens when the pressure at the inlet becomes higher than a set pressure value compared with the pressure at the outlet, and particularly prevents noise caused by hunting. It relates to what can be done.

従来のリリーフ弁は、例えば特許文献１に開示されている。これは、流入口と流出口を有する弁ケーシング内に流入口と流出口が連通する弁室を形成し、流入口と弁室の間に弁口を有する環状弁座を設け、環状弁座に離着座して弁口を開閉する円板状の弁体を弁室内に配置し、常時は弁体が環状弁座に着座して弁口を閉弁し流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁するものである。 A conventional relief valve is disclosed in Patent Document 1, for example. This is because a valve chamber in which an inlet and an outlet communicate with each other is formed in a valve casing having an inlet and an outlet, and an annular valve seat having a valve port is provided between the inlet and the valve chamber. A disc-shaped valve element that opens and closes and opens and closes the valve port is placed in the valve chamber. Normally, the valve element is seated on the annular valve seat, the valve port is closed, and the inlet pressure becomes the outlet pressure. When the pressure is higher than the set pressure value, the valve body is separated from the annular valve seat and the valve port is opened.

特開２００６−１７０３２１JP 2006-170321 A

上記従来のリリーフ弁は、流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁することにより流体が流入口から流出口へ流れるのであるが、流体が流入口から流出口へ流れると流入口と流出口の圧力差が設定圧力値よりも低くなり弁体が環状弁座に着座して弁口を閉弁し、弁体が環状弁座に着座して弁口を閉弁すると流出口の圧力が低下して流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなり再び弁体が環状弁座から離座して弁口を開弁し、開閉弁を繰り返すハンチング現象が発生し、弁体が環状弁座に着座することを繰り返すことによる騒音が著しいという問題点があった。 In the conventional relief valve described above, when the pressure at the inlet becomes higher than the set pressure value compared with the pressure at the outlet, the valve body separates from the annular valve seat and opens the valve port, so that fluid flows from the inlet. When the fluid flows from the inlet to the outlet, the pressure difference between the inlet and the outlet becomes lower than the set pressure value, and the valve element sits on the annular valve seat and closes the valve opening. When the valve body is seated on the annular valve seat and the valve port is closed, the pressure at the outflow port decreases and the pressure at the inflow port becomes higher than the set pressure value compared to the pressure at the outflow port. There is a problem that a hunting phenomenon occurs in which the valve port is opened by opening the valve port from the seat and the valve element is repeatedly seated on the annular valve seat.

したがって本発明が解決しようとする課題は、弁体が環状弁座に着座することを繰り返すことによる騒音を低減できるリリーフ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 relief valve that can reduce noise caused by repeated seating of a valve body on an annular valve seat.

上記の課題を解決するために、本発明のリリーフ弁は、流入口と流出口を有する弁ケーシング内に流入口と流出口が連通する弁室を形成し、流入口と弁室の間に弁口を有する環状弁座を設け、環状弁座に離着座して弁口を開閉する円板状の弁体を弁室内に配置したものにおいて、弁体の外周を弁口の軸方向に摺動案内するシリンダを設け、弁体が環状弁座から離座して所定量開弁方向に変位したとき開口される流出窓をシリンダに設け、常時は弁体が環状弁座に着座して弁口を閉弁し流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁すると共に弁体が所定量開弁方向に変位して流出窓を開口することを特徴とするものである。 In order to solve the above problems, a relief valve of the present invention forms a valve chamber in which a flow inlet and a flow outlet communicate with each other in a valve casing having a flow inlet and a flow outlet, and the valve is provided between the flow inlet and the valve chamber. An annular valve seat having a port is provided, and a disc-shaped valve body that opens and closes the valve valve seat and opens and closes the valve port is disposed in the valve chamber. The outer periphery of the valve body slides in the axial direction of the valve port. A guide cylinder is provided, and the cylinder is provided with an outflow window that opens when the valve body is separated from the annular valve seat and displaced by a predetermined amount in the valve opening direction. When the pressure at the inlet becomes higher than the set pressure value compared to the pressure at the outlet, the valve body separates from the annular valve seat to open the valve port and the valve body opens in a predetermined amount of valve opening direction. Displacement opens the outflow window.

本発明は、弁体の外周を弁口の軸方向に摺動案内するシリンダを設け、弁体が環状弁座から離座して所定量開弁方向に変位したとき開口される流出窓をシリンダに設け、常時は弁体が環状弁座に着座して弁口を閉弁し流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁すると共に弁体が所定量開弁方向に変位して流出窓を開口するものである。そのため、流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁すると共に弁体が所定量開弁方向に変位して流出窓を開口することにより流体が流入口から流出口へ流れる。流体が流入口から流出口へ流れると流入口と流出口の圧力差が設定圧力値よりも低くなり弁体が閉弁方向に変位して流出窓を閉口し、弁体が流出窓を閉口すると流出口の圧力が低下して流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなり再び弁体が開弁方向に変位して流出窓を開口し、流出窓の開閉を繰り返す。そのため、弁体が環状弁座に着座することを繰り返さないので騒音を低減できるという優れた効果を奏する。 The present invention provides a cylinder that slides and guides the outer periphery of the valve body in the axial direction of the valve port, and sets the outflow window that opens when the valve body is separated from the annular valve seat and displaced in the valve opening direction by a predetermined amount. When the valve body is normally seated on the annular valve seat and the valve port is closed and the pressure at the inlet becomes higher than the set pressure value compared to the pressure at the outlet, the valve body is separated from the annular valve seat. Thus, the valve port is opened and the valve body is displaced by a predetermined amount in the valve opening direction to open the outflow window. Therefore, when the pressure at the inlet becomes higher than the set pressure value compared with the pressure at the outlet, the valve body is separated from the annular valve seat to open the valve port, and the valve body is displaced in the valve opening direction by a predetermined amount. Then, the fluid flows from the inlet to the outlet by opening the outlet window. When the fluid flows from the inlet to the outlet, the pressure difference between the inlet and outlet becomes lower than the set pressure value, and the valve body is displaced in the valve closing direction to close the outflow window, and the valve body closes the outflow window. The outlet pressure decreases, the inlet pressure becomes higher than the set pressure value compared to the outlet pressure, the valve body is displaced again in the valve opening direction, opens the outlet window, and the outlet window is repeatedly opened and closed. . Therefore, since the valve body does not repeat sitting on the annular valve seat, an excellent effect that noise can be reduced is achieved.

本発明の実施の形態に係わるリリーフ弁の断面図である。It is sectional drawing of the relief valve concerning embodiment of this invention.

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。本体１と蓋部材２から弁ケーシングを構成し、弁ケーシング内に弁室３を形成する。弁室３に連通する流入口４と流出口５を本体１に形成し、流入口４の弁室３側開口端に弁口６を有する環状弁座７を設ける。環状弁座７と一体にシリンダ８を形成する。環状弁座７とシリンダ８は本体１と蓋部材２の間に挟んで固定する。環状弁座７に離着座して弁口６を開閉する円板上の弁体９を環状弁座５に対向して弁室３内に配置する。弁体９はその下面から突出させて設けた流入口側弁棒１０と上面から突出させて設けた流出口側弁棒１１を一体に有する。流入口側弁棒１０の外周を摺動案内するガイド孔を有する流入口側ガイド部材１２を本体１に一体に形成し、流出口側弁棒１１の外周を摺動案内するガイド孔を有する流出口側ガイド部材１３を蓋部材２に一体に形成する。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. A valve casing is constituted by the main body 1 and the lid member 2, and a valve chamber 3 is formed in the valve casing. An inlet 4 and an outlet 5 communicating with the valve chamber 3 are formed in the main body 1, and an annular valve seat 7 having a valve port 6 is provided at the valve chamber 3 side opening end of the inlet 4. A cylinder 8 is formed integrally with the annular valve seat 7. The annular valve seat 7 and the cylinder 8 are sandwiched and fixed between the main body 1 and the lid member 2. A valve body 9 on a disk that opens and closes the valve port 6 by being seated on and off the annular valve seat 7 is disposed in the valve chamber 3 so as to face the annular valve seat 5. The valve body 9 integrally includes an inlet-side valve rod 10 provided so as to protrude from the lower surface thereof and an outlet-side valve rod 11 provided so as to protrude from the upper surface thereof. An inlet-side guide member 12 having a guide hole for slidingly guiding the outer periphery of the inlet-side valve stem 10 is formed integrally with the main body 1, and a flow having a guide hole for slidingly guiding the outer periphery of the outlet-side valve stem 11. The outlet side guide member 13 is formed integrally with the lid member 2.

シリンダ８は弁体９の外周を弁口６の軸方向に摺動案内し、弁体９が環状弁座７から離座して所定量開弁方向に変位したときに開口される複数個の例えば４個の流出窓１４を有する。常時は弁体９が環状弁座７に着座して弁口６を閉弁し流入口４の圧力が流出口５の圧力に比べて設定圧力値よりも高くなると弁体９が環状弁座７から離座して弁口６を開弁すると共に弁体９が所定量開弁方向に変位して流出窓１４を開口する。 The cylinder 8 slides and guides the outer periphery of the valve body 9 in the axial direction of the valve port 6. For example, it has four outflow windows 14. Normally, when the valve body 9 is seated on the annular valve seat 7 and the valve port 6 is closed and the pressure at the inlet 4 becomes higher than the set pressure value compared with the pressure at the outlet 5, the valve body 9 is moved to the annular valve seat 7. Then, the valve port 6 is opened and the valve element 9 is displaced in the valve opening direction by a predetermined amount to open the outflow window 14.

図示の状態は流入口４の圧力が流出口５の圧力に比べて設定圧力値よりも低い常時であり、弁体９が環状弁座７に着座して弁口６を閉弁している。 In the state shown in the drawing, the pressure at the inlet 4 is always lower than the set pressure value compared with the pressure at the outlet 5, and the valve body 9 is seated on the annular valve seat 7 and the valve port 6 is closed.

流入口４の圧力が流出口５の圧力に比べて設定圧力値よりも高くなると弁体９が環状弁座７から離座して弁口６を開弁すると共に弁体９が所定量開弁方向に変位して流出窓１４を開口する。これにより、流体が流入口４から弁口６、流出窓１４を通して流出口５へ流れる。流体が流入口４から流出口５へ流れると流入口４と流出口５の圧力差が設定圧力値よりも低くなり弁体９が閉弁方向に変位して流出窓１４を閉口し、弁体９が流出窓１４を閉口すると流出口５の圧力が低下して流入口４の圧力が流出口５の圧力に比べて設定圧力値よりも高くなり再び弁体９が開弁方向に変位して流出窓１４を開口し、流出窓１４の開閉を繰り返す。そのため、弁体９が環状弁座７に着座することを繰り返さないので騒音を低減できる。 When the pressure at the inlet 4 becomes higher than the set pressure value compared to the pressure at the outlet 5, the valve body 9 is separated from the annular valve seat 7 to open the valve port 6 and the valve body 9 is opened by a predetermined amount. Displacement in the direction opens the outflow window 14. As a result, the fluid flows from the inlet 4 to the outlet 5 through the valve port 6 and the outlet window 14. When the fluid flows from the inlet 4 to the outlet 5, the pressure difference between the inlet 4 and the outlet 5 becomes lower than the set pressure value, the valve body 9 is displaced in the valve closing direction, the outlet window 14 is closed, and the valve body is closed. When 9 closes the outflow window 14, the pressure at the outlet 5 decreases, the pressure at the inlet 4 becomes higher than the set pressure value compared to the pressure at the outlet 5, and the valve element 9 is displaced again in the valve opening direction. The outflow window 14 is opened and the outflow window 14 is repeatedly opened and closed. Therefore, since the valve element 9 is not repeatedly seated on the annular valve seat 7, noise can be reduced.

本発明は、流体配管や流体機器等の流体配管系に接続して流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると開弁するリリーフ弁に利用することができる。 The present invention can be used for a relief valve that is connected to a fluid piping system such as a fluid piping or a fluid device and opens when the pressure at the inlet becomes higher than a set pressure value compared to the pressure at the outlet.

１ 本体
２ 蓋部材
３ 弁室
４ 流入口
５ 流出口
６ 弁口
７ 環状弁座
８ シリンダ
９ 弁体
１０ 流入口側弁棒
１１ 流出口側弁棒
１２ 流入口側ガイド部材
１３ 流出口側ガイド部材
１４ 流出窓 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Valve chamber 4 Inlet 5 Outlet 6 Valve port 7 Annular valve seat 8 Cylinder 9 Valve body 10 Inlet side valve rod 11 Outlet side valve rod 12 Inlet side guide member 13 Outlet side guide member 14 Outflow window

Claims (1)

流入口と流出口を有する弁ケーシング内に流入口と流出口が連通する弁室を形成し、流入口と弁室の間に弁口を有する環状弁座を設け、環状弁座に離着座して弁口を開閉する円板状の弁体を弁室内に配置したものにおいて、弁体の外周を弁口の軸方向に摺動案内するシリンダを設け、弁体が環状弁座から離座して所定量開弁方向に変位したとき開口される流出窓をシリンダに設け、常時は弁体が環状弁座に着座して弁口を閉弁し流入口の圧力が流出口の圧力に比べて設定圧力値よりも高くなると弁体が環状弁座から離座して弁口を開弁すると共に弁体が所定量開弁方向に変位して流出窓を開口することを特徴とするリリーフ弁。 A valve chamber in which the inlet and outlet communicate with each other is formed in a valve casing having an inlet and an outlet, an annular valve seat having a valve port is provided between the inlet and the valve chamber, and the valve seat is attached to and detached from the annular valve seat. A disc-shaped valve body that opens and closes the valve port is arranged in the valve chamber, and a cylinder that slides and guides the outer periphery of the valve body in the axial direction of the valve port is provided, and the valve body is separated from the annular valve seat. The cylinder is provided with an outflow window that opens when it is displaced in the valve opening direction by a predetermined amount, and the valve body is normally seated on the annular valve seat and the valve port is closed, so that the inlet pressure is higher than the outlet pressure. A relief valve characterized in that when the pressure becomes higher than a set pressure value, the valve body is separated from the annular valve seat to open the valve port, and the valve body is displaced by a predetermined amount in the valve opening direction to open the outflow window.
JP2010058454A 2010-03-15 2010-03-15 Relief valve Expired - Fee Related JP5552341B2 (en)

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JP2011190888A true JP2011190888A (en) 2011-09-29
JP5552341B2 JP5552341B2 (en) 2014-07-16

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102870U (en) * 1982-01-06 1983-07-13 アイシン精機株式会社 Relief valve for oil pump
JPS59189965U (en) * 1983-06-03 1984-12-17 ウツエバルブ株式会社 Chattering prevention device for low differential pressure lift check valve
JPH01111888U (en) * 1988-01-25 1989-07-27
JPH0240171U (en) * 1988-09-09 1990-03-19
JPH02113180A (en) * 1988-10-20 1990-04-25 Tokyu Car Corp Pressure control valve
JPH0814427A (en) * 1994-07-01 1996-01-16 Kubota Corp Pressure governing valve for oil path in engine
JP2006170321A (en) * 2004-12-15 2006-06-29 Tlv Co Ltd Vacuum breaking valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102870U (en) * 1982-01-06 1983-07-13 アイシン精機株式会社 Relief valve for oil pump
JPS59189965U (en) * 1983-06-03 1984-12-17 ウツエバルブ株式会社 Chattering prevention device for low differential pressure lift check valve
JPH01111888U (en) * 1988-01-25 1989-07-27
JPH0240171U (en) * 1988-09-09 1990-03-19
JPH02113180A (en) * 1988-10-20 1990-04-25 Tokyu Car Corp Pressure control valve
JPH0814427A (en) * 1994-07-01 1996-01-16 Kubota Corp Pressure governing valve for oil path in engine
JP2006170321A (en) * 2004-12-15 2006-06-29 Tlv Co Ltd Vacuum breaking valve

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