JPH07198049A - Check valve - Google Patents

Check valve

Info

Publication number
JPH07198049A
JPH07198049A JP53694A JP53694A JPH07198049A JP H07198049 A JPH07198049 A JP H07198049A JP 53694 A JP53694 A JP 53694A JP 53694 A JP53694 A JP 53694A JP H07198049 A JPH07198049 A JP H07198049A
Authority
JP
Japan
Prior art keywords
valve body
valve
fluid
resistance plate
resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP53694A
Other languages
Japanese (ja)
Inventor
Kohei Kawanishi
康平 川西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP53694A priority Critical patent/JPH07198049A/en
Publication of JPH07198049A publication Critical patent/JPH07198049A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To prevent the deformation and damage of a valve seat and a valve body and also prevent damage caused by the collision of a resistance plate with a stopper, and moreover enable the adjustment of resistance acting upon the valve body. CONSTITUTION:When a fluid flows normally (flows from the left to the right without contraflow), a valve body 1 is oscillated (lifted) counterclockwise around a pin 4, separated from a valve seat 3, brought into contact with a valve body oscillation quantity regulating stopper 5 and held into a valve opening position. When the fluid flows backward from the right to the left, the force of lifting the valve body 1 is lost, and the valve 1 is oscillated clockwise around the pin 4 by its own weight and fluid force. At this time, the fluid existing above the valve body oscillation quantity regulating stopper 5 is in the nearly stagnant state (refer to a stagnant part), and a resistance plate 6 is oscillated therein clockwise along with the valve body 1. Counterclockwise resistance thereby acts upon the valve body 1 by the parachute effect of the resistance plate 6, so that the clockwise oscillating motion of the valve body 1 is reduced to relieve the collision force of the valve body 1 to the valve seat 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、流体の流れる配管内に
設置する逆止弁に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve installed in a pipe through which a fluid flows.

【０００２】[0002]

【従来の技術】従来の逆止弁を図５により説明すると、
１が弁体、２が同弁体１のシート面で、同弁体１は、弁
体１の一端部に設けたピン４により配管内に揺動可能に
取付けられている。３が弁座、５が配管内面から弁体１
の方向に突設した弁体揺動量調整用ストッパである。2. Description of the Related Art A conventional check valve will be described with reference to FIG.
Reference numeral 1 is a valve body, 2 is a seat surface of the valve body 1, and the valve body 1 is swingably mounted in a pipe by a pin 4 provided at one end of the valve body 1. 3 is a valve seat, 5 is a valve body 1 from the inside of the pipe
It is a stopper for adjusting the swing amount of the valve element, which is provided so as to project in the direction of.

【０００３】上記逆止弁では、流体が通常のように流れ
て逆流しない（矢印のように左から右へ流れて逆流しな
い）ときには、弁体１がピン４を中心に反時計方向に揺
動（浮上）して、弁体１のシート面２が弁座３から離
れ、弁体揺動量調整用ストッパ５に当接して、開弁位置
に保持される。また流体が右から左へ流れて逆流すると
きには、弁体１がピン４を中心に時計方向に揺動し、弁
体１のシート面２が弁座３に着座して、閉弁位置に保持
される。In the above check valve, when the fluid normally flows and does not flow backward (flows from left to right as shown by arrow and does not flow back), the valve body 1 swings counterclockwise around the pin 4. (Float), the seat surface 2 of the valve body 1 separates from the valve seat 3, contacts the valve body swing amount adjusting stopper 5, and is held at the valve open position. Further, when the fluid flows from right to left and flows backward, the valve body 1 swings clockwise around the pin 4, the seat surface 2 of the valve body 1 is seated on the valve seat 3, and is held in the valve closed position. To be done.

【０００４】[0004]

【発明が解決しようとする課題】前記図５に示す従来の
逆止弁では、流体が通常のように流れて逆流しない（矢
印のように左から右へ流れて逆流しない）ときには、弁
体１がピン４を中心に反時計方向に揺動（浮上）して、
弁体１が弁座３から離れ、弁体揺動量調整用ストッパ５
に当接して、開弁位置に保持される。In the conventional check valve shown in FIG. 5, when the fluid flows normally and does not flow backward (flows from left to right as shown by the arrow and does not flow back), the valve body 1 Swings (floats) counterclockwise around pin 4,
The valve body 1 separates from the valve seat 3, and the valve body swing amount adjustment stopper 5
And is held in the valve opening position.

【０００５】また流体が逆流する（右から左へ流れて逆
流する）ときには、弁体１を浮上させている力が無くな
り、弁体１が自重と流体力とにより、ピン４を中心に時
計方向に揺動し、弁体１のシート面２が弁座３に着座し
て、閉弁位置に保持される。このとき、流体の種類、流
速等によっては、弁体１を時計方向に揺動させる力が非
常に大きくなり、弁体１が高速で弁座３に衝突して、弁
座３や弁体１が変形したり、損傷するという問題があっ
た。When the fluid flows backward (flows from right to left and flows backward), the force for floating the valve body 1 disappears, and the valve body 1 rotates clockwise around the pin 4 due to its own weight and fluid force. The seat surface 2 of the valve body 1 is seated on the valve seat 3 and held in the valve closed position. At this time, depending on the type of fluid, the flow velocity, etc., the force for rocking the valve body 1 in the clockwise direction becomes very large, and the valve body 1 collides with the valve seat 3 at high speed, and the valve seat 3 and the valve body 1 There was a problem of being deformed or damaged.

【０００６】本発明は前記の問題点に鑑み提案するもの
であり、その目的とする処は、弁座や弁体の変形や損傷
を防止できる。また抵抗板のストッパへの衝突に基づく
損傷を防止できる。さらに弁体に作用する抵抗力を調整
できる逆止弁を提供しようとする点にある。The present invention is proposed in view of the above problems, and the object thereof is to prevent deformation and damage of the valve seat and the valve body. Further, it is possible to prevent damage due to collision of the resistance plate with the stopper. Another point is to provide a check valve capable of adjusting the resistance force acting on the valve body.

【０００７】[0007]

【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、流体の逆流により、弁体が一端部の枢
支点を中心に揺動し、弁座に着座して、流体の逆流を防
止する逆止弁において、前記弁体に抵抗力を作用させて
弁体の揺動速度を減速させる抵抗板を前記弁体に取付け
ている。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method in which a valve body oscillates around a pivot point of one end due to a reverse flow of a fluid, and the valve body is seated on a valve seat. In the check valve for preventing the reverse flow, a resistance plate that applies a resistance force to the valve body to reduce the swing speed of the valve body is attached to the valve body.

【０００８】前記逆止弁において、抵抗板を支持棒を介
して弁体の枢支点付近に取付けて、弁体が弁座に着座し
ても抵抗板がストッパに衝突しない位置に保持可能にし
てもよい。前記逆止弁において、抵抗板の大きさ、形状
等を変えて、弁体に作用する抵抗力を調整可能にしても
よい。In the above check valve, the resistance plate is attached near the pivot point of the valve body through the support rod so that the resistance plate can be held at a position where it does not collide with the stopper even when the valve body is seated on the valve seat. Good. In the check valve, the resistance plate acting on the valve body may be adjustable by changing the size and shape of the resistance plate.

【０００９】[0009]

【作用】本発明の逆止弁は前記のように構成されてお
り、流体が通常のように流れるときには、弁体が枢支点
を中心に流体の流れ方向に揺動（浮上）して、弁体が弁
座から離れ、弁体揺動量調整用ストッパに当接して、開
弁位置に保持される。一方、流体が逆流するときには、
弁体を浮上させている力が無くなり、弁体が自重と流体
力とにより、枢支点を中心に弁座方向に揺動する。この
とき、弁体揺動量調整用ストッパの上方に存在する流体
が殆ど停滞した状態にあり、その中を抵抗板が弁体と共
に弁座方向に揺動するので、抵抗板のパラシュート効果
により、弁体に反対方向の抵抗力が作用し、弁体の弁座
方向への揺動運動が減速して、弁体の弁座に対する衝突
力が緩和される。The check valve of the present invention is constructed as described above, and when the fluid normally flows, the valve body oscillates (floats) in the fluid flow direction around the pivot point, and the valve The body separates from the valve seat, contacts the valve body swing amount adjusting stopper, and is held in the valve open position. On the other hand, when the fluid flows backward,
The force for floating the valve element disappears, and the valve element swings in the valve seat direction about the pivot point due to its own weight and fluid force. At this time, the fluid existing above the valve body swing amount adjusting stopper is almost stagnant, and the resistance plate swings together with the valve body toward the valve seat in that state. A resistance force in the opposite direction acts on the body, the swinging motion of the valve body toward the valve seat is decelerated, and the collision force of the valve body against the valve seat is relieved.

【００１０】[0010]

【実施例】次に本発明の逆止弁を図１〜図４に示す一実
施例により説明すると、１が弁体、２が同弁体１のシー
ト面で、同弁体１は、弁体１の一端部に設けたピン４に
より配管内に揺動可能に取付けられている。３が弁座、
５が配管内面から弁体１の略中央部方向に突設した弁体
揺動量調整用ストッパである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a check valve of the present invention will be described with reference to an embodiment shown in FIGS. 1 to 4. 1 is a valve body, 2 is a seat surface of the valve body 1, and the valve body 1 is a valve. It is swingably mounted in the pipe by a pin 4 provided at one end of the body 1. 3 is the valve seat,
Reference numeral 5 is a stopper for adjusting the amount of rocking of the valve element, which is provided so as to project from the inner surface of the pipe toward the substantially central portion of the valve element 1.

【００１１】７が上記弁体１のピン（枢支点）４の近く
に取付けた支持棒、６が例えば矩形の抵抗板で、この抵
抗板６が上記支持棒７の先端部に取付けられている。次
に前記図１〜図４に示す逆止弁の作用を具体的に説明す
る。流体が通常のように流れる（左から右へ流れて逆流
しない）ときには、弁体１がピン４を中心に反時計方向
に揺動（浮上）して、弁体１が弁座３から離れ、弁体揺
動量調整用ストッパ５に当接して、開弁位置に保持され
る。Reference numeral 7 is a support rod attached near the pin (pivot point) 4 of the valve body 1, reference numeral 6 is a rectangular resistance plate, and the resistance plate 6 is attached to the tip of the support rod 7. . Next, the operation of the check valve shown in FIGS. 1 to 4 will be specifically described. When the fluid normally flows (flows from the left to the right and does not flow backward), the valve element 1 swings (floats) counterclockwise about the pin 4 and the valve element 1 separates from the valve seat 3. The valve body swinging amount adjusting stopper 5 is brought into contact with the valve body swinging amount adjusting stopper 5 to be held at the valve opening position.

【００１２】一方、流体が逆流する（右から左へ流れて
逆流する）ときには、弁体１を浮上させている力が無く
なり、弁体１が自重と流体力とにより、ピン４を中心に
時計方向に揺動する。このとき、弁体揺動量調整用スト
ッパ５の上方に存在する流体が殆ど停滞した状態にあり
（図１、図２の淀み部参照）、その中を抵抗板６が弁体
１と共に時計方向に揺動するので、抵抗板６のパラシュ
ート効果により、弁体１に反時計方向の抵抗力が作用
し、弁体１の時計方向の揺動運動が減速して、弁体１の
弁座３に対する衝突力が緩和される。On the other hand, when the fluid flows backward (flows from the right to the left), the force for floating the valve body 1 disappears, and the valve body 1 is rotated around the pin 4 by its own weight and fluid force. Rocks in the direction. At this time, the fluid existing above the valve body rocking amount adjusting stopper 5 is almost stagnant (see the stagnation portion in FIGS. 1 and 2), and the resistance plate 6 moves in the clockwise direction together with the valve body 1 therein. Since it swings, the counter-clockwise resistance force acts on the valve body 1 due to the parachute effect of the resistance plate 6, the clockwise swinging motion of the valve body 1 is decelerated, and the valve body 1 with respect to the valve seat 3 is decelerated. Collision force is alleviated.

【００１３】この抵抗力は、抵抗板６が流体中を移動す
ることにより発生する力であり、速度の２乗に比例して
大きくなるので、弁体１の揺動速度が小さいときは、殆
ど発生せず、揺動速度が大きいときにだけ発生する。そ
して抵抗板６は、支持棒７を介して弁体１のピン（枢支
点）４付近に取付けられており、弁体１が弁座３に着座
しても、弁体揺動量調整用ストッパ５付近に保持され
て、弁体揺動量調整用ストッパ５に衝突しない。This resistance force is a force generated when the resistance plate 6 moves in the fluid and increases in proportion to the square of the speed. Therefore, when the swing speed of the valve body 1 is small, it is almost the same. It does not occur, and occurs only when the swing speed is high. The resistance plate 6 is attached via a support rod 7 near the pin (pivot point) 4 of the valve body 1, and even if the valve body 1 is seated on the valve seat 3, the valve body rocking amount adjusting stopper 5 is provided. It is held in the vicinity and does not collide with the valve body swing amount adjusting stopper 5.

【００１４】逆止弁が使用される個所は様々であり、逆
流時、弁体１に作用する流体力は、使用される個所によ
り異なってくるので、抵抗体６のパラシュート効果によ
り弁体１に作用する抵抗力も変える必要があるが、抵抗
板６の大きさ、形状等を弁体１に作用する流体力に応じ
て変えるので、弁体１に作用する抵抗力を調整すること
が可能である。The check valve is used in various places, and the fluid force acting on the valve body 1 at the time of reverse flow varies depending on the used place. Therefore, the parachute effect of the resistor 6 causes the check valve to act on the valve body 1. Although it is necessary to change the acting resistance force, since the size, shape, etc. of the resistance plate 6 are changed according to the fluid force acting on the valve body 1, it is possible to adjust the resistance force acting on the valve body 1. .

【００１５】[0015]

【発明の効果】本発明の逆止弁は前記のように流体が通
常のように流れるときには、弁体を枢支点を中心に流体
の流れ方向に揺動（浮上）させて、弁体を弁座から離
し、弁体揺動量調整用ストッパに当接させて、開弁位置
に保持する。一方、流体が逆流するときには、弁体を浮
上させている力が無くなり、弁体を自重と流体力とによ
り、枢支点を中心に弁座方向に揺動させる。このとき、
弁体揺動量調整用ストッパの上方に存在する流体が殆ど
停止した状態にあり、その中を抵抗板が弁体と共に弁座
方向に揺動するので、抵抗板のパラシュート効果によ
り、弁体に反対方向の抵抗力が作用し、弁体の弁座方向
への揺動運動を減速させて、弁体の弁座に対する衝突力
を緩和するので、弁座や弁体の変形や損傷を防止でき
る。As described above, when the fluid normally flows, the check valve of the present invention oscillates (floats) the valve element around the pivot point in the fluid flow direction to move the valve element to the valve. It is separated from the seat, brought into contact with the stopper for adjusting the amount of swing of the valve body, and held at the valve open position. On the other hand, when the fluid flows backward, the force for floating the valve element disappears, and the valve element is swung in the valve seat direction about its pivot point by its own weight and fluid force. At this time,
The fluid above the stopper for adjusting the amount of swing of the valve is almost stopped, and the resistance plate swings together with the valve in the direction of the valve seat. Since the resistance force in the direction acts to slow down the swinging motion of the valve body in the direction of the valve seat and reduce the collision force of the valve body against the valve seat, deformation and damage of the valve seat and the valve body can be prevented.

【００１６】また抵抗板を支持棒を介して弁体に取付け
ており、弁体が弁座に着座しても、抵抗板を弁体揺動量
調整用ストッパ付近に保持して、弁体揺動量調整用スト
ッパに衝突させないので、抵抗板のストッパへの衝突に
基づく損傷を防止できる。また逆止弁が使用される個所
は様々であり、逆流時、弁体に作用する流体力は、使用
される個所により異なってくるので、抵抗体のパラシュ
ート効果により弁体に作用する抵抗力も変える必要があ
るが、抵抗板の大きさ、形状等を弁体に作用する流体力
に応じて変えるので、弁体に作用する抵抗力を調整でき
る。Further, the resistance plate is attached to the valve body via the support rod, and even if the valve body is seated on the valve seat, the resistance plate is held in the vicinity of the valve body swing amount adjusting stopper so that the valve body swing amount is maintained. Since it does not collide with the adjustment stopper, damage due to the collision of the resistance plate with the stopper can be prevented. Also, the check valve is used in various places, and the fluid force acting on the valve body at the time of reverse flow varies depending on the place used, so the resistance force acting on the valve body also changes due to the parachute effect of the resistor. Although it is necessary, since the size and shape of the resistance plate are changed according to the fluid force acting on the valve body, the resistance force acting on the valve body can be adjusted.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の逆止弁の一実施例の弁全開時の状態を
示す縦断側面図である。FIG. 1 is a vertical cross-sectional side view showing a state of a check valve according to an embodiment of the present invention when the valve is fully opened.

【図２】同逆止弁の弁閉鎖直前の状態を示す縦断側面図
である。FIG. 2 is a vertical cross-sectional side view showing a state of the check valve immediately before the valve is closed.

【図３】図１の矢視Ａ−Ａ線に沿う縦断背面図である。FIG. 3 is a vertical cross-sectional rear view taken along the line AA of FIG.

【図４】同逆止弁の弁体を示す縦断側面図である。FIG. 4 is a vertical cross-sectional side view showing a valve body of the check valve.

【図５】従来の逆止弁の縦断側面図である。FIG. 5 is a vertical sectional side view of a conventional check valve.

【符号の説明】[Explanation of symbols]

１ 弁体 ２ 弁体１のシート面 ３ 弁座 ４ 枢支部（ピン） ５ 弁体揺動量調整用ストッパ ６ 抵抗板 ７ 支持棒 1 valve body 2 seat surface of valve body 3 valve seat 4 pivotal support (pin) 5 stopper for adjusting the amount of swing of valve body 6 resistance plate 7 support rod

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 流体の逆流により、弁体が枢支点を中心
に揺動し、弁座に着座して、流体の逆流を防止する逆止
弁において、前記弁体に抵抗力を作用させて弁体の揺動
速度を減速させる抵抗板を前記弁体に取付けたことを特
徴とする逆止弁。1. A check valve for preventing a reverse flow of fluid by causing a resistance force to act on the valve body by causing the valve body to swing around a pivot point and seated on a valve seat due to the reverse flow of the fluid. A check valve, wherein a resistance plate for reducing the swing speed of the valve body is attached to the valve body. 【請求項２】 前記抵抗板を支持棒を介して前記弁体の
枢支点付近に取付けて、弁体が弁座に着座しても抵抗板
が弁体揺動量調整用ストッパに衝突しない位置に保持可
能にしたことを特徴とする請求項１記載の逆止弁。2. The resistance plate is attached via a support rod near the pivot of the valve body so that the resistance plate does not collide with the valve body swing amount adjusting stopper even when the valve body is seated on the valve seat. The check valve according to claim 1, wherein the check valve is held. 【請求項３】 前記抵抗板の大きさ、形状等を変えて、
弁体に作用する抵抗力を調整可能にしたことを特徴とす
る請求項１記載の逆止弁。3. The size, shape, etc. of the resistance plate are changed,
The check valve according to claim 1, wherein a resistance force acting on the valve body is adjustable.
JP53694A 1994-01-07 1994-01-07 Check valve Withdrawn JPH07198049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53694A JPH07198049A (en) 1994-01-07 1994-01-07 Check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53694A JPH07198049A (en) 1994-01-07 1994-01-07 Check valve

Publications (1)

Publication Number Publication Date
JPH07198049A true JPH07198049A (en) 1995-08-01

Family

ID=11476483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53694A Withdrawn JPH07198049A (en) 1994-01-07 1994-01-07 Check valve

Country Status (1)

Country Link
JP (1) JPH07198049A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106931194A (en) * 2015-12-31 2017-07-07 中国核动力研究设计院 A kind of check-valves that valve flap structure is opened with low voltage difference
CN108825827A (en) * 2018-06-22 2018-11-16 中广核研究院有限公司 Eccentric swing check valve
CN114001182A (en) * 2021-11-17 2022-02-01 中国核动力研究设计院 Low flow resistance small pressure difference check valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106931194A (en) * 2015-12-31 2017-07-07 中国核动力研究设计院 A kind of check-valves that valve flap structure is opened with low voltage difference
CN108825827A (en) * 2018-06-22 2018-11-16 中广核研究院有限公司 Eccentric swing check valve
CN114001182A (en) * 2021-11-17 2022-02-01 中国核动力研究设计院 Low flow resistance small pressure difference check valve
CN114001182B (en) * 2021-11-17 2024-01-30 中国核动力研究设计院 Low flow resistance small pressure difference check valve

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