JP2003028324A - Spring-loaded disk type check valve - Google Patents
Spring-loaded disk type check valveInfo
- Publication number
- JP2003028324A JP2003028324A JP2001213895A JP2001213895A JP2003028324A JP 2003028324 A JP2003028324 A JP 2003028324A JP 2001213895 A JP2001213895 A JP 2001213895A JP 2001213895 A JP2001213895 A JP 2001213895A JP 2003028324 A JP2003028324 A JP 2003028324A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- valve seat
- annular
- disc
- valve body
- 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.)
- Pending
Links
Landscapes
- Check Valves (AREA)
Abstract
Description
【発明の詳細な説明】
【0001】
【発明の属する技術分野】本発明は流体配管に取り付け
て、流体の一方向の流れは許すが、その逆方向の流れは
止める逆止弁に関し、特に、ディスク状弁体をばねで弁
座に付勢したばね付勢ディスク型逆止弁に関する。ばね
付勢ディスク型逆止弁では、ディスク状弁体の外周を弁
ケーシングの内周壁で摺接案内すると共にディスク状弁
体の外周と弁ケーシングの内周壁との間に流体通過用の
空き間を形成しなければならない。
【0002】
【従来の技術】ばね付勢ディスク型逆止弁の一例が実公
昭49−36740号公報に示されている。これは、弁
ケーシングに入口と出口を設け、入口と出口の間に環状
弁座を設け、環状弁座の出口側にディスク状弁体を配置
し、ディスク状弁体を環状弁座に付勢するばねを設け、
弁ケーシングの内周壁にディスク状弁体の外周を摺接さ
せてディスク状弁体を環状弁座の軸方向に案内するリブ
を設けたものである。
【0003】
【発明が解決しようとする課題】上記従来技術のばね付
勢ディスク型逆止弁では、流体中に混在しているゴミや
スケール等の異物がリブの内面に付着すると、リブの内
面とディスク状弁体の外周との間に異物を噛み込んだ状
態でディスク状弁体が環状弁座に接するために、環状弁
座に密着できない問題点があった。
【0004】従って、本発明の技術的課題は、リブの内
面とディスク状弁体の外周との間に異物を噛み込んだ状
態でディスク状弁体が環状弁座に接することのないばね
付勢ディスク型逆止弁を提供することである。
【0005】
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、弁ケーシング
に入口と出口を設け、入口と出口の間に環状弁座を設
け、環状弁座の出口側にディスク状弁体を配置し、ディ
スク状弁体を環状弁座に付勢するばねを設け、弁ケーシ
ングの内周壁にディスク状弁体の外周を摺接させてディ
スク状弁体を環状弁座の軸方向に案内するリブを設けた
ものにおいて、ディスク状弁体の厚みよりも幅が小さく
環状弁座の軸方向に対して斜めに開けた溝をリブの内面
に設けたことを特徴とするばね付勢ディスク型逆止弁に
ある。
【0006】
【発明の実施の形態】本発明は、ディスク状弁体の厚み
よりも幅が小さく環状弁座の軸方向に対して斜めに開け
た溝をリブの内面に設けたものである。そのため、リブ
の内面とディスク状弁体の外周との間に異物を噛み込ん
でも、異物はディスク状弁体が環状弁座に接する位置ま
で変位する過程で溝の角に当たって溝に落ちる。そのた
め、リブの内面とディスク状弁体の外周との間に異物を
噛み込んだ状態でディスク状弁体が環状弁座に接するこ
とがない。
【0007】
【実施例】次に、図1を参照して本発明の技術的手段の
具体例を示す実施例を説明する。図1において、本実施
例の弁ケーシング1は、図示しない入口側配管フランジ
と出口側配管フランジの間に配置されボルトとナットか
らなる締結手段によって挟持されるものである。弁ケー
シング1に入口2と環状弁座3と出口4を同軸上に形成
する。
【0008】弁ケーシング1の内周壁に、ディスク状弁
体6の外周を摺接させてディスク状弁体6を環状弁座3
の軸方向に案内するリブ5を4個設ける。リブ5の内面
は総て同心円上に位置し環状弁座3の軸心から等距離に
形成する。リブ5の内面に、ディスク状弁体6の厚みよ
りも幅が小さく環状弁座3の軸方向に対して斜めに開け
た溝10を5個形成する。
【0009】環状弁座3の出口4側にディスク状弁体6
を配置する。ディスク状弁体6はその直径がリブ5内面
の直径よりも少し小さく、外周がリブ5の内面に緩く摺
接する。リブ5にばね受け7の外周を嵌めて固定する。
ディスク状弁体6とばね受け7の間にディスク状弁体6
を環状弁座3に付勢するコイルばね8を配置する。ばね
受け7は中心に流体通過用孔9を有し、外周側が入口2
側に曲がり、更にその外周側が弁ケーシング1の内周壁
側に曲がった形状である。
【0010】入口2の流体圧力が出口4よりも高くなる
と、ディスク状弁体6はコイルばね8の付勢力に抗して
出口4側に変位し、入口4の流体がリブ5の間の空間を
通って出口4に流れる。リブ5の内面に、ディスク状弁
体6の厚みよりも幅が小さく環状弁座3の軸方向に対し
て斜めに開けた溝10を5個形成しているので、リブ5
の内面とディスク状弁体6の外周との間に異物を噛み込
んでも、異物はディスク状弁体6が出口4側に変位する
過程で溝10の角に当たって溝10に落ちる。
【0011】出口4の流体圧力が入口2よりも高くなる
と、ディスク状弁体6は流体圧力とコイルばね8の作用
を受けて、入口2側に変位し環状弁座6に機密的に接す
る。リブ5の内面とディスク状弁体6の外周との間に異
物を噛み込んでも、異物はディスク状弁体6が環状弁座
3に接する位置まで変位する過程で溝10の角に当たっ
て溝10に落ちる。そのため、リブ5の内面とディスク
状弁体6の外周との間に異物を噛み込んだ状態でディス
ク状弁体6が環状弁座3に接することがない。
【0012】
【発明の効果】上記のように本発明によれば、ディスク
状弁体の厚みよりも幅が小さく環状弁座の軸方向に対し
て斜めに開けた溝をリブの内面に形成することにより、
リブの内面とディスク状弁体の外周との間に噛み込んだ
異物はディスク状弁体が環状弁座に接する位置まで変位
する過程で溝の角に当たって溝に落ちるので、リブの内
面とディスク状弁体の外周との間に異物を噛み込んだ状
態でディスク状弁体が環状弁座に接することがないとい
う優れた効果を生じる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve which is attached to a fluid pipe to permit one-way flow of a fluid but to stop the flow in the opposite direction. The present invention relates to a spring-biased disc check valve in which a disc-shaped valve body is urged to a valve seat by a spring. In the spring-biased disc type check valve, the outer periphery of the disc-shaped valve body is slidably guided by the inner peripheral wall of the valve casing, and a space for fluid passage is provided between the outer periphery of the disc-shaped valve body and the inner peripheral wall of the valve casing. Must be formed. 2. Description of the Related Art An example of a spring-loaded disk check valve is disclosed in Japanese Utility Model Publication No. 49-36740. In this method, an inlet and an outlet are provided in a valve casing, an annular valve seat is provided between the inlet and the outlet, and a disc-shaped valve body is arranged on the outlet side of the annular valve seat, and the disc-shaped valve body is urged to the annular valve seat. To provide a spring
A rib for guiding the disc-shaped valve body in the axial direction of the annular valve seat by sliding the outer periphery of the disc-shaped valve body on the inner peripheral wall of the valve casing. [0003] In the above-mentioned prior art spring-loaded disk type check valve, when foreign matter such as dirt and scale mixed in the fluid adheres to the inner surface of the rib, the inner surface of the rib is disturbed. There is a problem that the disk-shaped valve body contacts the annular valve seat in a state where foreign matter is caught between the disk-shaped valve body and the outer periphery of the disk-shaped valve body, so that the disk-shaped valve body cannot be in close contact with the annular valve seat. Accordingly, a technical object of the present invention is to provide a spring-loaded device in which a disc-shaped valve body does not come into contact with an annular valve seat in a state where foreign matter is caught between an inner surface of a rib and an outer periphery of the disc-shaped valve body. It is to provide a disk-type check valve. [0005] In order to solve the above-mentioned technical problems, the technical means of the present invention is to provide an inlet and an outlet in a valve casing, and to provide an annular valve seat between the inlet and the outlet. Is provided, a disc-shaped valve body is disposed on the outlet side of the annular valve seat, a spring for urging the disc-shaped valve body against the annular valve seat is provided, and the outer periphery of the disc-shaped valve body is brought into sliding contact with the inner peripheral wall of the valve casing. The rib provided for guiding the disc-shaped valve body in the axial direction of the annular valve seat has a width smaller than the thickness of the disc-shaped valve body and formed obliquely in the axial direction of the annular valve seat. A spring-loaded disk check valve characterized by being provided on an inner surface. DETAILED DESCRIPTION OF THE INVENTION In the present invention, a groove having a width smaller than the thickness of a disk-shaped valve body and formed obliquely with respect to the axial direction of an annular valve seat is provided on the inner surface of a rib. Therefore, even if foreign matter is caught between the inner surface of the rib and the outer periphery of the disc-shaped valve body, the foreign matter hits the corner of the groove and falls into the groove in the process of displacing the disk-shaped valve body to a position in contact with the annular valve seat. Therefore, the disc-shaped valve body does not come into contact with the annular valve seat in a state where foreign matter is caught between the inner surface of the rib and the outer periphery of the disc-shaped valve body. Next, an embodiment showing a specific example of the technical means of the present invention will be described with reference to FIG. In FIG. 1, a valve casing 1 of the present embodiment is disposed between an inlet-side piping flange and an outlet-side piping flange (not shown) and is sandwiched by fastening means including bolts and nuts. An inlet 2, an annular valve seat 3, and an outlet 4 are formed coaxially in a valve casing 1. The disk-shaped valve element 6 is brought into sliding contact with the inner peripheral wall of the valve casing 1 by sliding the outer periphery of the disk-shaped valve element 6.
Are provided with four ribs 5 for guiding in the axial direction. The inner surfaces of the ribs 5 are all located on concentric circles and are formed equidistant from the axis of the annular valve seat 3. On the inner surface of the rib 5, five grooves 10 having a width smaller than the thickness of the disk-shaped valve body 6 and formed obliquely with respect to the axial direction of the annular valve seat 3 are formed. At the outlet 4 side of the annular valve seat 3, a disc-shaped valve body 6 is provided.
Place. The diameter of the disc-shaped valve element 6 is slightly smaller than the diameter of the inner surface of the rib 5, and the outer periphery of the disk-shaped valve element 6 slides loosely on the inner surface of the rib 5. The outer periphery of the spring receiver 7 is fitted and fixed to the rib 5.
The disc-shaped valve element 6 is disposed between the disc-shaped valve element 6 and the spring receiver 7.
A coil spring 8 for urging the annular valve seat 3 is disposed. The spring receiver 7 has a fluid passage hole 9 at the center, and the
Side, and the outer peripheral side is further curved toward the inner peripheral wall side of the valve casing 1. When the fluid pressure at the inlet 2 becomes higher than that at the outlet 4, the disc-shaped valve 6 is displaced toward the outlet 4 against the urging force of the coil spring 8, and the fluid at the inlet 4 flows into the space between the ribs 5. Through to exit 4. On the inner surface of the rib 5, five grooves 10 which are smaller in width than the thickness of the disc-shaped valve body 6 and are formed obliquely with respect to the axial direction of the annular valve seat 3 are formed.
Even if foreign matter is caught between the inner surface of the disk-shaped valve body 6 and the outer periphery of the disk-shaped valve body 6, the foreign matter hits the corner of the groove 10 and falls into the groove 10 while the disk-shaped valve body 6 is displaced toward the outlet 4. When the fluid pressure at the outlet 4 becomes higher than that at the inlet 2, the disc-shaped valve 6 is displaced toward the inlet 2 by the action of the fluid pressure and the action of the coil spring 8 and comes into contact with the annular valve seat 6 in a secure manner. Even if foreign matter is caught between the inner surface of the rib 5 and the outer periphery of the disc-shaped valve body 6, the foreign matter hits the corner of the groove 10 in the process of displacing the disc-shaped valve body 6 to a position where it comes into contact with the annular valve seat 3 and enters the groove 10. drop down. Therefore, the disc-shaped valve body 6 does not come into contact with the annular valve seat 3 in a state where foreign matter is caught between the inner surface of the rib 5 and the outer periphery of the disc-shaped valve body 6. As described above, according to the present invention, a groove having a width smaller than the thickness of the disk-shaped valve body and formed obliquely with respect to the axial direction of the annular valve seat is formed on the inner surface of the rib. By
Foreign matter that has caught between the inner surface of the rib and the outer periphery of the disc-shaped valve body falls into the groove at the corner of the groove while the disc-shaped valve body is displaced to a position in contact with the annular valve seat. An excellent effect is obtained in that the disc-shaped valve body does not come into contact with the annular valve seat in a state where foreign matter is caught between the valve body and the outer periphery of the valve body.
【図面の簡単な説明】
【図1】本発明のばね付勢ディスク型逆止弁の実施例の
断面図である。
【符号の説明】
1 弁ケーシング
2 入口
3 環状弁座
4 出口
5 リブ
6 ディスク状弁体
7 ばね受け
8 コイルばね
10 溝
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of a spring-biased disk check valve according to the present invention. [Description of Signs] 1 Valve casing 2 Inlet 3 Annular valve seat 4 Outlet 5 Rib 6 Disc-shaped valve element 7 Spring receiver 8 Coil spring 10 Groove
Claims (1)
と出口の間に環状弁座を設け、環状弁座の出口側にディ
スク状弁体を配置し、ディスク状弁体を環状弁座に付勢
するばねを設け、弁ケーシングの内周壁にディスク状弁
体の外周を摺接させてディスク状弁体を環状弁座の軸方
向に案内するリブを設けたものにおいて、ディスク状弁
体の厚みよりも幅が小さく環状弁座の軸方向に対して斜
めに開けた溝をリブの内面に設けたことを特徴とするば
ね付勢ディスク型逆止弁。Claims 1. An inlet and an outlet are provided in a valve casing, an annular valve seat is provided between the inlet and the outlet, and a disk-shaped valve body is disposed on an outlet side of the annular valve seat. A spring provided to bias the body against the annular valve seat, and a rib for sliding the outer periphery of the disc-shaped valve body against the inner peripheral wall of the valve casing to guide the disc-shaped valve body in the axial direction of the annular valve seat. A spring-biased disk-type check valve, characterized in that a groove having a width smaller than the thickness of the disk-shaped valve body and formed obliquely with respect to the axial direction of the annular valve seat is provided on the inner surface of the rib.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001213895A JP2003028324A (en) | 2001-07-13 | 2001-07-13 | Spring-loaded disk type check valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001213895A JP2003028324A (en) | 2001-07-13 | 2001-07-13 | Spring-loaded disk type check valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2003028324A true JP2003028324A (en) | 2003-01-29 |
Family
ID=19048801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001213895A Pending JP2003028324A (en) | 2001-07-13 | 2001-07-13 | Spring-loaded disk type check valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2003028324A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003028330A (en) * | 2001-07-13 | 2003-01-29 | Tlv Co Ltd | Spring-loaded disk type antifreezing valve |
KR101261974B1 (en) * | 2011-02-01 | 2013-05-08 | (주) 유앤아이솔루션 | Back Stream Protection Valve |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60252818A (en) * | 1984-05-28 | 1985-12-13 | Hitachi Ltd | Steam regulating valve |
JPS6349069U (en) * | 1986-09-18 | 1988-04-02 | ||
JPH058113U (en) * | 1991-07-16 | 1993-02-05 | 愛知機械工業株式会社 | Continuously variable transmission |
JPH1018966A (en) * | 1996-06-28 | 1998-01-20 | Silver Kk | Electromagnetic pump |
JP2000179719A (en) * | 1998-12-15 | 2000-06-27 | Tlv Co Ltd | Spring energizing disk type check valve |
-
2001
- 2001-07-13 JP JP2001213895A patent/JP2003028324A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60252818A (en) * | 1984-05-28 | 1985-12-13 | Hitachi Ltd | Steam regulating valve |
JPS6349069U (en) * | 1986-09-18 | 1988-04-02 | ||
JPH058113U (en) * | 1991-07-16 | 1993-02-05 | 愛知機械工業株式会社 | Continuously variable transmission |
JPH1018966A (en) * | 1996-06-28 | 1998-01-20 | Silver Kk | Electromagnetic pump |
JP2000179719A (en) * | 1998-12-15 | 2000-06-27 | Tlv Co Ltd | Spring energizing disk type check valve |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003028330A (en) * | 2001-07-13 | 2003-01-29 | Tlv Co Ltd | Spring-loaded disk type antifreezing valve |
KR101261974B1 (en) * | 2011-02-01 | 2013-05-08 | (주) 유앤아이솔루션 | Back Stream Protection Valve |
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