JP2012193786A - Check valve - Google Patents

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Publication number
JP2012193786A
JP2012193786A JP2011057220A JP2011057220A JP2012193786A JP 2012193786 A JP2012193786 A JP 2012193786A JP 2011057220 A JP2011057220 A JP 2011057220A JP 2011057220 A JP2011057220 A JP 2011057220A JP 2012193786 A JP2012193786 A JP 2012193786A
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Prior art keywords
valve
plug
spring
valve body
inlet
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JP2011057220A
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JP5732285B2 (en
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Masahisa Hiroya
昌久 広谷
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TLV Co Ltd
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TLV Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a check valve which can prevent a spring and a valve body from being collided with a plug, can change pressure when opening the valve by using the single spring, can forcibly close the valve by forcibly seating the valve body on an annular valve seat, or can forcibly open the valve by forcibly separating the valve body from the annular valve seat.SOLUTION: An inlet 4, a valve chamber 3, an outlet 5 and a second outlet 6 are formed of a valve casing composed of a body 1 and the plug 2. The annular valve seat 7 is arranged between the inlet 4 and the valve chamber 3. The valve body 8 for opening and closing the annular valve seat 7 is arranged in the valve chamber 3. The coil-shaped spring 9 is arranged between the valve body 8 and the plug 2. The plug 2 is advancingly and contractibly screw-connected to the body 1 from the outside. One end of the coil-shaped spring 9 is press-inserted into a recess of the valve body 8, and a protrusion of the plug 2 is press-inserted into the other end of the coil-shaped spring 9.

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 which 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 valve body provided inside.

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、本体とプラグから成る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弁体を弁室内に配置し、弁体とプラグの間に配置したばねで弁体を環状弁座へ付勢したものにおいて、ばねの一端を弁体に圧入したものである。 A conventional check valve is disclosed in Patent Document 1, for example. This is a valve casing composed of a main body and a plug, which forms an inlet, a valve chamber, and an outlet. An annular valve seat is provided between the inlet and the valve chamber. A valve body that opens and closes the annular valve seat is disposed in the valve chamber. In the case where the valve body is urged to the annular valve seat by a spring disposed between the body and the plug, one end of the spring is press-fitted into the valve body.

特開２００８−９５８９３号公報JP 2008-95893 A

上記従来の逆止弁は、ばねの一端を弁体に圧入することにより、ばねが弁体に衝突することがなく、ばね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ものである。しかしながら、ばねがプラグに衝突するためにばねが損傷したり騒音が発生したりする問題点があり、改良の余地を残すものであった。また、弁体が環状弁座から離座して開弁するときの圧力を変更するためには、付勢力の異なるバネを組込まなければならない問題点があった。また、弁体を環状弁座に強制的に着座させて強制閉弁させたりありいは弁体を環状弁座から強制的に離座させて強制開弁させたりすることができない問題点があった。 The above-described conventional check valve has an excellent effect that the spring does not collide with the valve body by press-fitting one end of the spring into the valve body, and the spring can be prevented from being damaged or generating noise. . However, since the spring collides with the plug, there is a problem that the spring is damaged or noise is generated, and there remains room for improvement. Moreover, in order to change the pressure when the valve body is opened from the annular valve seat, there is a problem that springs having different urging forces must be incorporated. In addition, there is a problem that the valve body cannot be forcibly seated on the annular valve seat and forcibly closed, or the valve body cannot be forcibly separated from the annular valve seat for forced opening. It was.

したがって本発明が解決しようとする課題は、ばねが弁体やプラグに衝突することを防止でき、単一のバネを用いて開弁するときの圧力を変更することができると共に弁体を環状弁座に強制的に着座させて強制閉弁させたりありいは弁体を環状弁座から強制的に離座させて強制開弁させたりす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 that the spring can be prevented from colliding with the valve body and the plug, the pressure when the valve is opened using a single spring can be changed, and the valve body can be an annular valve. It is an object of the present invention to provide a check valve capable of forcibly seating on a seat and forcibly closing it, or forcibly leaving a valve body from an annular valve seat and forcibly opening it.

上記の課題を解決するために、本発明の逆止弁は、本体とプラグから成る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弁体を弁室内に配置し、弁体とプラグの間にばねを配置したものにおいて、外部から進退操作可能にプラグを本体にねじ結合し、ばねの一端を弁体に圧入すると共にばねの他端をプラグに圧入したことを特徴とするものである。 In order to solve the above-described problems, a check valve according to the present invention includes a valve casing including a main body and a plug to form an inlet, a valve chamber, and an outlet, and an annular valve seat is provided between the inlet and the valve chamber. A valve body that opens and closes the seat is placed in the valve chamber, and a spring is placed between the valve body and the plug. The plug is screwed to the main body so that it can be advanced and retracted from the outside, and one end of the spring is press-fitted into the valve body. In addition, the other end of the spring is press-fitted into the plug.

本発明によれば、外部から進退操作可能にプラグを本体にねじ結合し、ばねの一端を弁体に圧入すると共にばねの他端をプラグに圧入したことにより、ばねが弁体に衝突したりプラグに衝突したりすることがなく、ばね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ものである。また、プラグを前進させて弁体に近づけるとばねの付勢力を強めて入口がより高圧で開弁させることができ、更にプラグを前進させることにより弁体を環状弁座に着座させて強制閉弁させることができ、逆にプラグを後退させて弁体から遠ざけるとばねの付勢力を弱めて入口がより低圧で開弁させることができ、更にプラグを後退させることにより弁体を環状弁座から離座させて強制開弁させることができ、単一のバネを用いて開弁するときの圧力を変更したり、強制閉弁あるいは強制開弁したりすることができるという優れた効果を生じるものである。 According to the present invention, the plug is screw-coupled to the main body so that it can be moved back and forth from the outside, and one end of the spring is press-fitted into the valve body and the other end of the spring is press-fitted into the plug. It does not collide with the plug and produces an excellent effect of preventing damage to the spring and generation of noise. Further, when the plug is moved forward and close to the valve body, the biasing force of the spring can be strengthened to open the inlet at a higher pressure, and the plug is further advanced to seat the valve body on the annular valve seat and forcibly closed. Conversely, when the plug is retracted away from the valve body, the spring biasing force is weakened and the inlet can be opened at a lower pressure, and the plug is further retracted to open the valve body to the annular valve seat. The valve can be forced to open by being separated from the valve, and it has the excellent effect of being able to change the pressure when opening with a single spring, or to forcibly close or open the valve. Is.

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.

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。弁ケーシングは本体１にプラグ２を外部から進退操作可能に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に対するプラグ２のねじ進退操作はプラグ２に設けた凹部に回転操作部材を挿入して行う。本体１に入口４と出口５と第２出口６を形成する。出口５と第２出口６は入口４から直角方向に向けて形成する。第２出口６は対向して２つ形成する。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. The valve casing is formed by screwing a plug 2 to the main body 1 so as to be able to advance and retreat from the outside, and forms a substantially cylindrical valve chamber 3 inside. The screw 2 is moved back and forth with respect to the main body 1 by inserting a rotary operation member into a recess provided in the plug 2. An inlet 4, an outlet 5 and a second outlet 6 are formed in the main body 1. The outlet 5 and the second outlet 6 are formed in a direction perpendicular to the inlet 4. Two second outlets 6 are formed facing each other.

本体１の入口４の弁室３側開口端に環状弁座７を設ける。環状弁座７は入口４と同一軸上に形成する。弁室３内に弁体８を配置する。プラグ２と弁体８の間にコイル状ばね９を設ける。コイル状ばね９の一端を弁体８の凹部内に圧入し、コイル状ばね９の他端にプラグ２の凸部を圧入する。弁体８の弁室３の内径を弁体８の外径よりも少し大径に形成して弁室３の内壁で弁体８の外周を環状弁座７の軸方向に案内する。出口５は本体１の弁体８の側部に位置し、第２出口６は本体１の弁体８の背部に位置する。 An annular valve seat 7 is provided at the valve chamber 3 side opening end of the inlet 4 of the main body 1. The annular valve seat 7 is formed on the same axis as the inlet 4. A valve body 8 is arranged in the valve chamber 3. A coiled spring 9 is provided between the plug 2 and the valve body 8. One end of the coiled spring 9 is press-fitted into the concave portion of the valve body 8, and the convex portion of the plug 2 is press-fitted into the other end of the coiled spring 9. The inner diameter of the valve chamber 3 of the valve body 8 is formed to be slightly larger than the outer diameter of the valve body 8, and the outer periphery of the valve body 8 is guided in the axial direction of the annular valve seat 7 by the inner wall of the valve chamber 3. The outlet 5 is located on the side of the valve body 8 of the main body 1, and the second outlet 6 is located on the back of the valve body 8 of the main body 1.

入口４の流体圧力が出口５と第２出口６の流体圧力及びコイル状ばね９の付勢力よりも大きくなると、弁体８がコイル状ばね９を圧縮して環状弁座７から離座し、弁室３の内壁により環状弁座７の軸方向に案内されてプラグ２側に変位する。これにより、入口４の流体が出口５に流れると共に、弁体８の外周と弁室３の内壁との間を通過した流体が第２出口６に流れる。入口４の流体圧力が出口５と第２出口６の流体圧力及びコイル状ばね９の付勢力よりも小さくなると、弁体８が弁室３の内壁により環状弁座７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７に着座し、出口５と第２出口６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 second outlet 6 and the biasing force of the coiled spring 9, the valve body 8 compresses the coiled spring 9 and separates from the annular valve seat 7, It is guided in the axial direction of the annular valve seat 7 by the inner wall of the valve chamber 3 and displaced toward the plug 2 side. Thereby, the fluid at the inlet 4 flows to the outlet 5 and the fluid that has passed between the outer periphery of the valve body 8 and the inner wall of the valve chamber 3 flows to the second outlet 6. When the fluid pressure at the inlet 4 becomes smaller than the fluid pressure at the outlet 5 and the second outlet 6 and the biasing force of the coiled spring 9, the valve body 8 is guided in the axial direction of the annular valve seat 7 by the inner wall of the valve chamber 3. The coil spring 8 is displaced toward the inlet 4 side by the urging force of the coiled spring 8 and is seated on the annular valve seat 7 to prevent backflow of fluid from the outlet 5 and the second outlet 6 to the inlet 4.

コイル状ばね９の一端を弁体８の凹部内に圧入し、コイル状ばね９の他端にプラグ２の凸部を圧入しているので、コイル状ばね９が弁体８に衝突したりプラグ２に衝突したりすることがなく、コイル状ばね９の損傷や騒音の発生を防止できる。またプラグ２をねじ込んで前進させて弁体８に近づけるとコイル状ばね９の付勢力を強めて入口４がより高圧で開弁させることができ、更にプラグ２をねじ込んで前進させることにより弁体８を環状弁座７に着座させて強制閉弁させることができる。逆にプラグ２をねじ戻して後退させて弁体８から遠ざけるとコイル状ばね９の付勢力を弱めて入口４がより低圧で開弁させることができ、更にプラグ２をねじ戻して後退させることにより弁体８を環状弁座７から離座させて強制開弁させることができる。 Since one end of the coiled spring 9 is press-fitted into the concave portion of the valve body 8 and the convex portion of the plug 2 is press-fitted into the other end of the coiled spring 9, the coiled spring 9 collides with the valve body 8 or plugs 2 and the coiled spring 9 can be prevented from being damaged and generating noise. Further, when the plug 2 is screwed forward and moved closer to the valve body 8, the biasing force of the coiled spring 9 is strengthened so that the inlet 4 can be opened at a higher pressure, and further, the plug 2 is screwed forward to advance the valve body. 8 can be forcibly closed by seating on the annular valve seat 7. Conversely, when the plug 2 is unscrewed and moved backward to move away from the valve body 8, the biasing force of the coiled spring 9 can be weakened to open the inlet 4 at a lower pressure, and the plug 2 can be unscrewed and moved backward. Thus, the valve body 8 can be separated from the annular valve seat 7 and forcedly opened.

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

１ 本体
２ プラグ
３ 弁室
４ 入口
５ 出口
６ 第２出口
７ 環状弁座
８ 弁体
９ コイル状ばね DESCRIPTION OF SYMBOLS 1 Main body 2 Plug 3 Valve chamber 4 Inlet 5 Outlet 6 Second outlet 7 Annular valve seat 8 Valve body 9 Coil spring

Claims (1)

本体とプラグから成る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弁体を弁室内に配置し、弁体とプラグの間にばねを配置したものにおいて、外部から進退操作可能にプラグを本体にねじ結合し、ばねの一端を弁体に圧入すると共にばねの他端をプラグに圧入したことを特徴とする逆止弁。 A valve casing comprising a main body and a plug forms an inlet, a valve chamber, and an outlet. An annular valve seat is provided between the inlet and the valve chamber. A valve body that opens and closes the annular valve seat is disposed in the valve chamber. Non-return check, characterized in that a spring is arranged between the plug, the plug is screwed to the body so that it can be moved back and forth from the outside, one end of the spring is press-fitted into the valve body, and the other end of the spring is press-fitted into the plug valve.
JP2011057220A 2011-03-15 2011-03-15 Check valve Active JP5732285B2 (en)

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JP5732285B2 JP5732285B2 (en) 2015-06-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404571A (en) * 2018-12-07 2019-03-01 中国航空工业集团公司金城南京机电液压工程研究中心 A kind of plug-in one-way valve of anti-leak

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522414U (en) * 1975-06-24 1977-01-08
GB2076123A (en) * 1980-04-25 1981-11-25 Butcher Brothers Ltd A hose check valve
JPH0312070U (en) * 1989-06-14 1991-02-07
US5092361A (en) * 1989-03-23 1992-03-03 Nippon Piston Ring Co., Ltd. Inline type check valve
US5332000A (en) * 1993-01-05 1994-07-26 Gassner, Inc. Low pressure sensitive valve
JP2008095893A (en) * 2006-10-13 2008-04-24 Tlv Co Ltd Check valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522414U (en) * 1975-06-24 1977-01-08
GB2076123A (en) * 1980-04-25 1981-11-25 Butcher Brothers Ltd A hose check valve
US5092361A (en) * 1989-03-23 1992-03-03 Nippon Piston Ring Co., Ltd. Inline type check valve
JPH0312070U (en) * 1989-06-14 1991-02-07
US5332000A (en) * 1993-01-05 1994-07-26 Gassner, Inc. Low pressure sensitive valve
JP2008095893A (en) * 2006-10-13 2008-04-24 Tlv Co Ltd Check valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404571A (en) * 2018-12-07 2019-03-01 中国航空工业集团公司金城南京机电液压工程研究中心 A kind of plug-in one-way valve of anti-leak

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