JP3005215B1 - Check valve - Google Patents
Check valveInfo
- Publication number
- JP3005215B1 JP3005215B1 JP36750798A JP36750798A JP3005215B1 JP 3005215 B1 JP3005215 B1 JP 3005215B1 JP 36750798 A JP36750798 A JP 36750798A JP 36750798 A JP36750798 A JP 36750798A JP 3005215 B1 JP3005215 B1 JP 3005215B1
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- Prior art keywords
- cylinder
- passage
- valve body
- valve
- fluid
- Prior art date
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Abstract
【要約】
【課題】 スラリー等の流動体を用いても頻繁に清掃す
る必要のない逆止弁を提供する。
【解決手段】 内部が第1円筒2と第2円筒3と第3円
筒4の3段付円筒空間を有し、各円筒の直径は、第1円
筒直径d1<第2円筒直径d2<第3円筒直径d3であ
る本体1と、第2円筒3と嵌合する円筒体であって、第
3円筒側の外周に円周状のシール6を有し、内部に空間
7を有しこの空間より第1円筒2に通ずる第1通路8と
シール6より第1円筒側の側面に通ずる第2通路9とを
有する弁体5と、を備える。A check valve that does not need to be cleaned frequently even when a fluid such as a slurry is used. SOLUTION: The interior has a three-stage cylindrical space of a first cylinder 2, a second cylinder 3, and a third cylinder 4, and the diameter of each cylinder is as follows: first cylinder diameter d1 <second cylinder diameter d2 <third cylinder diameter. A cylindrical body fitted with the main body 1 having a cylindrical diameter d3 and the second cylindrical body 3, having a circumferential seal 6 on the outer periphery of the third cylindrical side, and having a space 7 therein; The valve body 5 includes a first passage 8 that communicates with the first cylinder 2 and a second passage 9 that communicates from the seal 6 to a side surface on the first cylinder side.
Description
【0001】[0001]
【発明の属する技術分野】本発明は、逆止弁に係わり、
特にスラリー等の流動体を通しても詰まり難い逆止弁に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve,
In particular, the present invention relates to a check valve which is hardly clogged even through a fluid such as a slurry.
【0002】[0002]
【従来の技術】図9は往復動ポンプに逆止弁を用いた例
を示す。往復動ポンプは、シリンダ20内をピストン2
1が往復動する。シリンダ20の端部には吸入口22と
吐出口23が設けられており、それぞれ逆止弁24、2
5が図に示す向きに取付けられている。ピストン21が
図で左側に移動するとき吸入口22の逆止弁24が開い
て液体を吸入し、吐出口23の逆止弁25は閉じてい
る。右側に移動するとき吸入口22の逆止弁24は閉
じ、吐出口23の逆止弁25は開いて液体を吐出する。2. Description of the Related Art FIG. 9 shows an example in which a check valve is used for a reciprocating pump. The reciprocating pump has a piston 2 in the cylinder 20.
1 reciprocates. A suction port 22 and a discharge port 23 are provided at an end of the cylinder 20, and check valves 24, 2
5 are mounted in the direction shown in the figure. When the piston 21 moves to the left in the figure, the check valve 24 of the suction port 22 is opened to suck the liquid, and the check valve 25 of the discharge port 23 is closed. When moving to the right, the check valve 24 of the suction port 22 closes and the check valve 25 of the discharge port 23 opens to discharge the liquid.
【0003】[0003]
【発明が解決しようとする課題】しかしかかる往復動ポ
ンプでスラリー等の流動体を移送する場合、バネ等で付
勢された球が通路を閉鎖する従来の逆止弁を用いると、
球接する通路にスラリーの粒子が付着し、弁としての閉
鎖機能が劣化し逆圧時漏れが発生するため、頻繁に清掃
する必要があった。However, when a fluid such as slurry is transferred by such a reciprocating pump, if a conventional check valve in which a ball urged by a spring or the like closes a passage is used,
Slurry particles adhere to the passage in contact with the sphere, deteriorating the closing function of the valve and causing leakage at the time of reverse pressure, so that frequent cleaning was required.
【0004】本発明は上述の問題点に鑑みてなされたも
ので、スラリー等の流動体を用いても頻繁に清掃する必
要のない逆止弁を提供することを目的とする。The present invention has been made in view of the above problems, and has as its object to provide a check valve which does not need to be cleaned frequently even when a fluid such as slurry is used.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するた
め、請求項1の発明では、内部が第1円筒と第2円筒と
第3円筒の3段付円筒空間を有し、各円筒の直径は、第
1円筒直径d1<第2円筒直径d2<第3円筒直径d3
である本体と、前記第2円筒と嵌合する円筒体であっ
て、第3円筒側の外周に円周状のシールを有し、内部に
空間を有しこの空間より第1円筒に通ずる第1通路と前
記シールより第1円筒側の側面に通ずる第2通路とを有
する弁体と、を備える。In order to achieve the above object, according to the first aspect of the present invention, the interior has a three-stage cylindrical space of a first cylinder, a second cylinder, and a third cylinder, and the diameter of each cylinder is three. Is the first cylinder diameter d1 <the second cylinder diameter d2 <the third cylinder diameter d3
And a cylindrical body fitted with the second cylinder, having a circumferential seal on the outer periphery of the third cylinder side, having a space inside, and a third body passing from the space to the first cylinder. A valve body having one passage and a second passage leading to a side surface of the seal closer to the first cylinder.
【0006】弁体が第2円筒内にある状態で第3円筒側
から弁体に流体圧が加わる場合、シールによって第1円
筒への流体の流れは阻止され、弁体の移動は第1円筒に
より阻止される。弁体の第2通路が第3円筒内にある状
態で第3円筒側から弁体に流体圧が加わる場合、第2通
路が第2円筒に入るまでは流体が第3円筒側から第1円
筒に流れるが、第2円筒に入ってしまえばシールによっ
て第1円筒への流体の流れは阻止され、弁体の移動は第
1円筒に当たり停止する。弁体が第2円筒内にある状態
で第1円筒側から流体圧がかかると、弁体は第3円筒側
へ移動し、弁体の第2通路が第3円筒内に入ると、流体
が第1円筒、第1通路、空間、第2通路を通り第3円筒
に流入し、第1円筒と第3円筒が連通する。これにより
逆止弁としての機能が発揮される。When fluid pressure is applied to the valve body from the third cylinder side while the valve body is in the second cylinder, the flow of fluid to the first cylinder is blocked by the seal and the movement of the valve body is restricted to the first cylinder. Is blocked by When fluid pressure is applied to the valve body from the third cylinder side while the second passage of the valve body is in the third cylinder, fluid flows from the third cylinder side to the first cylinder side until the second passage enters the second cylinder. However, once the fluid enters the second cylinder, the flow of fluid to the first cylinder is blocked by the seal, and the movement of the valve body hits the first cylinder and stops. When the fluid pressure is applied from the first cylinder side while the valve body is in the second cylinder, the valve body moves to the third cylinder side, and when the second passage of the valve body enters the third cylinder, the fluid flows. It flows into the third cylinder through the first cylinder, the first passage, the space, and the second passage, and the first cylinder and the third cylinder communicate with each other. Thereby, the function as a check valve is exhibited.
【0007】請求項2の発明では、前記弁体と第3円筒
との間には弁体を第1円筒側に復帰させる第1バネが設
けられている。According to the second aspect of the present invention, a first spring for returning the valve body to the first cylinder side is provided between the valve body and the third cylinder.
【0008】このように第1バネを設けることにより、
弁体の第2通路が第3円筒内にある状態で第1円筒側か
らの流体圧が減少すると、第1バネにより弁体は第2円
筒内に復帰するので、第3円筒側から流体圧がかかって
も第1円筒側に漏れる流体は少くなる。By providing the first spring in this manner,
When the fluid pressure from the first cylinder decreases while the second passage of the valve body is in the third cylinder, the valve body returns to the second cylinder by the first spring. However, the amount of fluid that leaks to the first cylinder side is reduced.
【0009】請求項3の発明では、前記弁体の空間には
前記第1通路を閉塞する球と、この球を第1通路に押し
付ける第2バネとが設けられている。According to the third aspect of the present invention, a sphere for closing the first passage and a second spring for pressing the sphere against the first passage are provided in the space of the valve body.
【0010】弁体が第2円筒内にある状態で第3円筒側
から弁体に流体圧が加わる場合、シールによって第1円
筒への流体の流れは阻止され、弁体の移動は第1円筒に
より阻止される。弁体が第2円筒内にあるときに、第1
円筒側から流体圧がかかると、弁体は第3円筒側へ移動
し、弁体の第2通路が第3円筒内に入ると、第2通路か
らの背圧がなくなるので球が第2バネに抗して第1通路
から離れ、流体が第1円筒、第1通路、空間、第2通路
を通り第3円筒に流入し、第1円筒と第3円筒が連通す
る。また、弁体の第2通路が第3円筒内にあり、第1円
筒側からの流体圧が弱まると第2バネが働いて球が第1
通路を閉塞するので、第3円筒側から流体圧が加わって
も、請求項1のように、弁体の第2通路が第2円筒に入
るまでの間に、流体が第3円筒、第2通路、空間、第1
通路を通り第1円筒に漏れることはない。これにより逆
止弁としての機能が発揮される。When fluid pressure is applied to the valve body from the third cylinder side while the valve body is in the second cylinder, the flow of fluid to the first cylinder is prevented by the seal, and the movement of the valve body is restricted to the first cylinder. Is blocked by When the valve body is in the second cylinder, the first
When the fluid pressure is applied from the cylinder side, the valve body moves to the third cylinder side, and when the second passage of the valve body enters the third cylinder, the back pressure from the second passage disappears, so that the ball is moved by the second spring. Away from the first passage, the fluid flows into the third cylinder through the first cylinder, the first passage, the space, and the second passage, and the first cylinder and the third cylinder communicate with each other. Further, the second passage of the valve body is in the third cylinder, and when the fluid pressure from the first cylinder side weakens, the second spring operates to move the ball to the first cylinder.
Since the passage is closed, even if the fluid pressure is applied from the third cylinder side, the fluid flows through the third cylinder and the second cylinder until the second passage of the valve element enters the second cylinder as in claim 1. Passage, space, 1st
It does not leak into the first cylinder through the passage. Thereby, the function as a check valve is exhibited.
【0011】請求項4の発明では、前記弁体が第3円筒
側に移動したとき弁体が第2円筒から外れないように移
動を阻止するスットパが前記第3円筒に設けられてい
る。In the fourth aspect of the present invention, the stop cylinder is provided on the third cylinder so as to prevent the valve body from moving off the second cylinder when the valve body moves to the third cylinder side.
【0012】第2通路が第3円筒内に全て入った後に弁
体の第3円筒側の端部が当たるストッパを設けることに
より、弁体が第2円筒から飛び出すのを防止できる。By providing a stopper against which the end of the valve body on the third cylinder side comes into contact after the second passage has completely entered the third cylinder, the valve body can be prevented from jumping out of the second cylinder.
【0013】[0013]
【発明の実施の形態】以下本発明の実施形態について図
面を参照して説明する。図1は第1実施形態の逆止弁の
構成を示す図であり、(A)は断面図、(B)は(A)
のX−X矢視図である。1は逆止弁の本体で、第1円筒
2、第2円筒3、第3円筒4からなる段付き円筒状の空
間が設けられている。第1円筒の直径をd1,第2円筒
の直径をd2,第3円筒の直径をd3とすると、d1<
d2<d3の寸法になっている。5は弁体で第2円筒3
より少し小さい直径の円筒で、長さはほぼ第2円筒3と
同じであり、第2円筒3に嵌合している。弁体5の第3
円筒4側の外周にはOリング用溝6aが設けられ、Oリ
ング6が装着されている。Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are diagrams showing a configuration of a check valve according to a first embodiment, wherein FIG. 1A is a cross-sectional view, and FIG.
FIG. Reference numeral 1 denotes a main body of the check valve, which is provided with a stepped cylindrical space including a first cylinder 2, a second cylinder 3, and a third cylinder 4. Assuming that the diameter of the first cylinder is d1, the diameter of the second cylinder is d2, and the diameter of the third cylinder is d3, d1 <
d2 <d3. 5 is a valve body and a second cylinder 3
A slightly smaller diameter cylinder, approximately the same length as the second cylinder 3, and fits over the second cylinder 3. Third of valve element 5
An O-ring groove 6a is provided on the outer periphery of the cylinder 4 side, and the O-ring 6 is mounted.
【0014】弁体5の内部には円筒形で下部が円錐状の
空間7が設けられ、円錐状の底部には第1円筒2に導通
する第1通路8が設けられている。また円筒7の円筒部
にはOリング用溝6aより第1円筒側の側外面に導通す
る第2通路9が設けられている。第3円筒4にはストッ
パ10が設けられ、弁体5が第3円筒4内に移動しても
第2円筒3から抜けないようになっている。また第2円
筒3の第3円筒4側の角aは丸くなっており、Oリング
6が摺動しても傷つかないようになっている。A space 7 having a cylindrical shape and a conical bottom is provided inside the valve body 5, and a first passage 8 communicating with the first cylinder 2 is provided at a bottom of the conical shape. The cylindrical portion of the cylinder 7 is provided with a second passage 9 that conducts from the O-ring groove 6a to the outer surface on the first cylindrical side. A stopper 10 is provided on the third cylinder 4 so that the valve body 5 does not fall out of the second cylinder 3 even when the valve body 5 moves into the third cylinder 4. The corner a of the second cylinder 3 on the third cylinder 4 side is rounded so that the O-ring 6 is not damaged even if it slides.
【0015】次に図1〜図3を用いて動作を説明する。
図1に示すように弁体5が第2円筒3内にあり、第3円
筒4側から流体圧が加わる場合、流体はOリング6によ
り阻止されるので第1円筒2へ流れない。また弁体5は
第1円筒2に当たるので移動しない。図1の状態で第1
円筒2側より流体圧が加わると、弁体5は第3円筒4側
に移動し、図2に示すように弁体5の第2通路9が第3
円筒4内に入ると、第1円筒2、第1通路8、空間7、
第2通路9を通り、流体が第3円筒4へ流れる。弁体5
はストッパ10に当たり停止する。弁体5がこの位置で
流体圧が図3に示すように第3円筒4側からかかると、
流体が第3円筒4、第2通路9、空間7、第1通路8を
通り第1円筒2に流れるが、弁体5が移動し第2通路9
が第2円筒3内に入れば、これらの流路は閉鎖されるの
で、この流れによる流体の漏れは僅かである。弁体5が
第1円筒2に当たると停止する。なお、Oリング6は第
2円筒3と摺動する際、第2円筒3に付着する粒子等を
除去する働きをするので、スラリーのような流動体に適
した逆止弁となっている。Next, the operation will be described with reference to FIGS.
As shown in FIG. 1, when the valve element 5 is in the second cylinder 3 and a fluid pressure is applied from the third cylinder 4 side, the fluid is blocked by the O-ring 6 and does not flow to the first cylinder 2. Also, the valve body 5 does not move because it comes into contact with the first cylinder 2. 1 in the state of FIG.
When fluid pressure is applied from the cylinder 2 side, the valve body 5 moves to the third cylinder 4 side, and the second passage 9 of the valve body 5
Once inside the cylinder 4, the first cylinder 2, the first passage 8, the space 7,
The fluid flows to the third cylinder 4 through the second passage 9. Valve 5
Hits the stopper 10 and stops. When the fluid pressure is applied from the third cylinder 4 side as shown in FIG.
Fluid flows into the first cylinder 2 through the third cylinder 4, the second passage 9, the space 7, and the first passage 8, but the valve element 5 moves and the second passage 9
When the fluid enters the second cylinder 3, these flow paths are closed, and the leakage of the fluid due to this flow is slight. When the valve body 5 hits the first cylinder 2, it stops. When the O-ring 6 slides on the second cylinder 3, the O-ring 6 functions to remove particles and the like adhering to the second cylinder 3, so that the O-ring 6 is a check valve suitable for a fluid such as slurry.
【0016】次に第2実施形態を説明する。図4、図5
は第2実施形態を示す。第2実施形態は図1に示す第1
実施形態に対し、弁体5とストッパ10との間に第1バ
ネ11を設けた点が相違し他は同じである。なおスット
パ10は第1バネ11を安定して支えるため4個にして
いる。図4は第2実施形態の逆止弁の構成を示し、
(A)は断面図、(B)は(A)のY−Y矢視図であ
る。図5は図4の状態から弁体5が移動した状態を示
す。Next, a second embodiment will be described. 4 and 5
Shows a second embodiment. The second embodiment corresponds to the first embodiment shown in FIG.
The embodiment is different from the embodiment in that a first spring 11 is provided between a valve body 5 and a stopper 10, and the other parts are the same. The number of stoppers 10 is four in order to stably support the first spring 11. FIG. 4 shows a configuration of a check valve according to the second embodiment,
(A) is a cross-sectional view, and (B) is a view taken along the line YY of (A). FIG. 5 shows a state where the valve element 5 has moved from the state of FIG.
【0017】次に図4〜図5を用いて動作を説明する。
図4に示すように弁体5が第2円筒3内にあり、第3円
筒4側から流体圧が加わる場合、流体はOリング6によ
り阻止されるので流体は第1円筒2へ流れない。また弁
体5は第1円筒2に当たるので移動しない。図4の状態
で第1円筒2側より流体圧が加わると、弁体5は第1バ
ネ11に抗して第3円筒4側に移動し、図5に示すよう
に弁体5の第2通路9が第3円筒4内に入ると、第1円
筒2、第1通路8、空間7、第2通路9を通り、流体が
第3円筒4へ流れる。弁体5はストッパ10に当たり停
止する。この状態で第1円筒2側からの流体圧が弱まる
と、第1バネ11が働き弁体5は図4で示すように第2
円筒3内に復帰する。これにより、第1実施形態の第3
図で説明した、流体圧が第3円筒4側からかかった場合
の流体漏れを防止することができる。Next, the operation will be described with reference to FIGS.
As shown in FIG. 4, when the valve element 5 is inside the second cylinder 3 and a fluid pressure is applied from the third cylinder 4 side, the fluid is blocked by the O-ring 6, so that the fluid does not flow to the first cylinder 2. Also, the valve body 5 does not move because it comes into contact with the first cylinder 2. When a fluid pressure is applied from the first cylinder 2 side in the state of FIG. 4, the valve body 5 moves to the third cylinder 4 side against the first spring 11, and as shown in FIG. When the passage 9 enters the third cylinder 4, the fluid flows through the first cylinder 2, the first passage 8, the space 7, and the second passage 9 to the third cylinder 4. The valve element 5 hits the stopper 10 and stops. In this state, when the fluid pressure from the first cylinder 2 side weakens, the first spring 11 operates to move the valve body 5 to the second position as shown in FIG.
It returns into the cylinder 3. As a result, the third embodiment of the first embodiment
It is possible to prevent fluid leakage when the fluid pressure is applied from the third cylinder 4 side described in the drawing.
【0018】次に第3実施形態を説明する。図6〜図8
は第3実施形態を示す。第3実施形態は図1に示す第1
実施形態に対し、弁体5の空間7内に第1通路8を閉鎖
する球12と、この球12を第1通路8に押圧する第2
バネ13とを設けた点が相違し他は同じである。図6は
第3実施形態の逆止弁の構成を示し、図7、図8は図6
に対し弁体5が移動した状態を示す。Next, a third embodiment will be described. 6 to 8
Shows a third embodiment. The third embodiment corresponds to the first embodiment shown in FIG.
In contrast to the embodiment, a ball 12 that closes the first passage 8 in the space 7 of the valve body 5 and a second ball 12 that presses the ball 12 into the first passage 8
The difference is that a spring 13 is provided, and the others are the same. FIG. 6 shows a configuration of a check valve according to the third embodiment, and FIGS.
5 shows a state in which the valve element 5 has moved.
【0019】次に図6〜図8を用いて動作を説明する。
図6に示すように弁体5が第2円筒3内にあり、第3円
筒4側から流体圧が加わる場合、流体はOリング6によ
り阻止されるので流体は第1円筒2へ流れない。また弁
体5は第1円筒2に当たるので移動しない。図6の状態
で第1円筒2側より流体圧が加わると、弁体5は第3円
筒4側に移動し、図7に示すように弁体5の第2通路9
が第3円筒4内に入ると、第2通路9からの背圧が少な
くなり、球12が第2バネ13に抗して第1通路8から
離れ、第1円筒2、第1通路8、空間7、第2通路9を
通り、流体が第3円筒4へ流れる。弁体5はストッパ1
0に当たり停止する。弁体5がこの位置で第1円筒2側
からの流体圧が弱まると、第2バネ13が働き球12が
第1通路8に押し付けられ流路を閉鎖する。この状態で
流体圧が図8に示すように第3円筒4側からかかって
も、第3円筒4、第2通路9、空間7、第1通路8を通
り第1円筒2に流れる流路は球12で閉鎖されているの
で、流体の漏れはない。流体圧により弁体5は移動し第
2円筒3内に入り、第1円筒2に当たり停止する。な
お、スラリー等の流動体を使用する場合、従来の逆止弁
と同様に、球12と接する第1通路8に粒子等が付着す
るが、シールはOリング6で行うため、この面に粒子等
が付着しても、図8の状態で流体が多少漏る程度であ
る。このため従来の逆止弁の弁座の清掃を行う頻度より
もかなり少ない頻度で清掃を行えばよい。Next, the operation will be described with reference to FIGS.
As shown in FIG. 6, when the valve element 5 is inside the second cylinder 3 and a fluid pressure is applied from the third cylinder 4 side, the fluid is blocked by the O-ring 6, so that the fluid does not flow to the first cylinder 2. Also, the valve body 5 does not move because it comes into contact with the first cylinder 2. When the fluid pressure is applied from the first cylinder 2 side in the state of FIG. 6, the valve element 5 moves to the third cylinder 4 side, and as shown in FIG.
Enters the third cylinder 4, the back pressure from the second passage 9 decreases, the ball 12 separates from the first passage 8 against the second spring 13, and the first cylinder 2, the first passage 8, The fluid flows to the third cylinder 4 through the space 7 and the second passage 9. The valve element 5 is the stopper 1
Stops at zero. When the fluid pressure from the first cylinder 2 side is weakened at this position of the valve body 5, the second spring 13 works and the ball 12 is pressed against the first passage 8 to close the flow passage. In this state, even if the fluid pressure is applied from the third cylinder 4 side as shown in FIG. 8, the flow path flowing to the first cylinder 2 through the third cylinder 4, the second passage 9, the space 7, and the first passage 8 is Since it is closed by the ball 12, there is no leakage of fluid. The valve element 5 moves by the fluid pressure, enters the second cylinder 3 and hits the first cylinder 2 and stops. When a fluid such as a slurry is used, particles adhere to the first passage 8 in contact with the sphere 12 as in the case of the conventional check valve. Even if they adhere, the fluid is slightly leaked in the state of FIG. For this reason, the cleaning may be performed much less frequently than the frequency of cleaning the valve seat of the conventional check valve.
【0020】以上の説明では弁体5の一方から流体圧が
働くとしたが、これは弁体5の両側の差圧の一方が高い
と同じ意味である。これにより本実施形態の逆止弁は負
圧に対しても動作する。In the above description, the fluid pressure acts from one side of the valve body 5, but this has the same meaning as one of the differential pressures on both sides of the valve body 5 is high. As a result, the check valve of the present embodiment operates even with a negative pressure.
【0021】[0021]
【発明の効果】以上の説明から明らかなように、本発明
は、弁本体に円筒状3段付空間を設け、さらにこの第2
円筒内に嵌合する弁体を設け、弁体の外周に設けたシー
ルで第2円筒との間をシールし、弁体内に第1円筒に導
通する第1通路と側面に導通する第2通路を有する空間
を設けることにより、スラリー等の流動体に対しても清
掃頻度の少ない逆止弁とすることができる。また、弁体
と第3円筒間に復帰用第1バネを設けたり、弁体の空間
内に第1通路を閉鎖するよう第2バネで付勢された球を
設けることにより、弁体が第2円筒内に復帰するときの
僅かな流体漏れを防止することができる。As is apparent from the above description, according to the present invention, a three-stage cylindrical space is provided in the valve body,
A valve body fitted in the cylinder is provided, and a seal provided on the outer periphery of the valve body seals the space between the second cylinder and the first passage in the valve body and the second passage in the valve body. By providing the space having the above, it is possible to provide a check valve with a low cleaning frequency even for a fluid such as a slurry. Also, by providing a first spring for return between the valve body and the third cylinder, or providing a ball urged by a second spring to close the first passage in the space of the valve body, Slight fluid leakage when returning to the inside of the two cylinders can be prevented.
【図1】第1実施形態の構成を示し、(A)は断面図、
(B)は(A)のX−X矢視図である。1A and 1B show a configuration of a first embodiment, in which FIG.
(B) is an XX view of (A).
【図2】図1の動作を示す図である。FIG. 2 is a diagram showing the operation of FIG.
【図3】図1の別の動作を示す図である。FIG. 3 is a diagram showing another operation of FIG. 1;
【図4】第2実施形態の構成を示し、(A)は断面図、
(B)は(A)のY−Y矢視図である。4A and 4B show a configuration of a second embodiment, in which FIG.
(B) is a view on arrow YY of (A).
【図5】図4の動作を示す図である。FIG. 5 is a diagram showing the operation of FIG. 4;
【図6】第3実施形態の構成を示すである。FIG. 6 shows a configuration of a third embodiment.
【図7】図6の動作を示す図である。FIG. 7 is a diagram showing the operation of FIG. 6;
【図8】図6の別の動作を示す図である。FIG. 8 is a diagram showing another operation of FIG. 6;
【図9】従来の逆止弁を使用した往復動ポンプを示す図
である。FIG. 9 is a diagram showing a conventional reciprocating pump using a check valve.
【符号の説明】 1 本体 2 第1円筒 3 第2円筒 4 第3円筒 5 弁体 6 Oリング(シール) 6a Oリング溝 7 空間 8 第1通路 9 第2通路 10 ストッパ 11 第1バネ 12 球 13 第2バネ[Description of Signs] 1 Main body 2 First cylinder 3 Second cylinder 4 Third cylinder 5 Valve 6 O-ring (seal) 6a O-ring groove 7 Space 8 First passage 9 Second passage 10 Stopper 11 First spring 12 Sphere 13 Second spring
Claims (4)
3段付円筒空間を有し、各円筒の直径は、第1円筒直径
d1<第2円筒直径d2<第3円筒直径d3である本体
と、前記第2円筒と嵌合する円筒体であって、第3円筒
側の外周に円周状のシールを有し、内部に空間を有しこ
の空間より第1円筒に通ずる第1通路と前記シールより
第1円筒側の側面に通ずる第2通路とを有する弁体と、
を備えたことを特徴とする逆止弁。1. The interior has a three-stage cylindrical space of a first cylinder, a second cylinder, and a third cylinder, and the diameter of each cylinder is as follows: first cylinder diameter d1 <second cylinder diameter d2 <third cylinder diameter a main body of d3 and a cylindrical body fitted with the second cylinder, having a circumferential seal on the outer periphery of the third cylinder side, having a space inside, and communicating with the first cylinder from this space; A valve body having a first passage and a second passage communicating with a side surface of the seal closer to the first cylinder;
A check valve comprising:
1円筒側に復帰させる第1バネが設けられていることを
特徴とする請求項1記載の逆止弁。2. The check valve according to claim 1, wherein a first spring for returning the valve body to the first cylinder side is provided between the valve body and the third cylinder.
する球と、この球を第1通路に押し付ける第2バネとが
設けられていることを特徴とする請求項1記載の逆止
弁。3. The reverse of claim 1, wherein a sphere for closing the first passage and a second spring for pressing the sphere against the first passage are provided in the space of the valve body. Stop valve.
体が第2円筒から外れないように移動を阻止するスット
パが前記第3円筒に設けられていることを特徴とする請
求項1ないし3のいずれかに記載の逆止弁。4. A stopper is provided on the third cylinder to prevent the valve body from moving away from the second cylinder when the valve body moves to the third cylinder side. The check valve according to any one of 1 to 3, above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36750798A JP3005215B1 (en) | 1998-12-24 | 1998-12-24 | Check valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36750798A JP3005215B1 (en) | 1998-12-24 | 1998-12-24 | Check valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JP3005215B1 true JP3005215B1 (en) | 2000-01-31 |
JP2000193109A JP2000193109A (en) | 2000-07-14 |
Family
ID=18489489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP36750798A Expired - Fee Related JP3005215B1 (en) | 1998-12-24 | 1998-12-24 | Check valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3005215B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107869603A (en) * | 2017-12-21 | 2018-04-03 | 厦门大学嘉庚学院 | Low pressure check valve and its method of work |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6063224B2 (en) * | 2012-09-26 | 2017-01-18 | 株式会社ニフコ | Check valve |
-
1998
- 1998-12-24 JP JP36750798A patent/JP3005215B1/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107869603A (en) * | 2017-12-21 | 2018-04-03 | 厦门大学嘉庚学院 | Low pressure check valve and its method of work |
CN107869603B (en) * | 2017-12-21 | 2023-08-04 | 厦门大学嘉庚学院 | Low-pressure one-way valve and working method thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2000193109A (en) | 2000-07-14 |
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