JPH033098B2 - - Google Patents
Info
- Publication number
- JPH033098B2 JPH033098B2 JP17047786A JP17047786A JPH033098B2 JP H033098 B2 JPH033098 B2 JP H033098B2 JP 17047786 A JP17047786 A JP 17047786A JP 17047786 A JP17047786 A JP 17047786A JP H033098 B2 JPH033098 B2 JP H033098B2
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- guide
- fluid
- downstream
- valve
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、バタフライ弁に関し、詳しくは、キ
ヤビテーシヨンを抑制するための構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a butterfly valve, and more particularly to a structure for suppressing cavitation.
従来、キヤビテーシヨンを抑制するに、弁体よ
りも下流側において管路内に種々の形状の整流具
を設けていた（例えば、実公昭44−2616号公報、
特開昭60−44673号公報参照）。
Conventionally, in order to suppress cavitation, various shapes of rectifiers were provided in the pipeline downstream of the valve body (for example, the method disclosed in Japanese Utility Model Publication No. 44-2616,
(Refer to Japanese Patent Application Laid-Open No. 60-44673).
しかし、従来の構造では未だ十分にキヤビテー
シヨンを抑制できず、改善の余地があつた。
However, the conventional structure still cannot sufficiently suppress cavitation, and there is room for improvement.
本発明によるバタフライ弁の特徴構成は、回転
弁体の上流側面に、その弁体の回転軸芯にほぼ沿
う方向で弁体の周縁部に流体を案内しかつ分散さ
せるガイドを設けたことにあり、その作用・効果
は次の通りである。
The characteristic configuration of the butterfly valve according to the present invention is that a guide is provided on the upstream side surface of the rotary valve body to guide and disperse fluid around the peripheral edge of the valve body in a direction substantially along the rotation axis of the valve body. , its actions and effects are as follows.
つまり、バタフライ弁においては回転弁体と管
路内周壁との間に形成されるスキマから下流に流
れる流体が集中し、その集中流体が噴流状に下流
側に吐出されるためにキヤビテーシヨンが生じる
のである。
In other words, in a butterfly valve, fluid flowing downstream from the gap formed between the rotary valve body and the inner circumferential wall of the pipeline concentrates, and cavitation occurs because the concentrated fluid is discharged downstream in the form of a jet. be.
しかがつて、回転弁体の上流側面に設けたガイ
ドにより流体を弁体の回転軸芯にほぼ沿う方向で
弁体の周縁側、（すらわち、回転弁体と管路内周
壁との間に形成されるスキマのうち巾狭の部分の
側）へ案内し、かつ、分散してやれば、弁体と管
路内周壁との間のスキマのうち中央寄りの巾の大
きい部分に流体が集中するというキヤビテーシヨ
ンの発生原因そのものを根本的に緩和でき、弁体
よりも下流側での整流処理にすぎない従来構造に
比してキヤビテーシヨンをより効果的に抑制でき
る。 Therefore, the guide provided on the upstream side of the rotary valve body directs the fluid to the peripheral side of the valve body (in other words, between the rotary valve body and the inner circumferential wall of the pipe) in a direction substantially along the rotation axis of the valve body. If the fluid is guided to the narrower part of the gap formed between the valve body and the inner circumferential wall of the pipe, and dispersed, the fluid will concentrate in the wider part of the gap between the valve body and the inner wall of the pipe. The cause of cavitation can be fundamentally alleviated, and cavitation can be suppressed more effectively than the conventional structure in which the flow is only rectified downstream of the valve body.
その結果、キヤビテーシヨンによる騒音の発
生、並びに、弁や管路の損傷を大巾に軽減でき
て、長期にわたり良好な流体輸送を行えるように
なつた。
As a result, noise generation due to cavitation and damage to valves and pipelines can be greatly reduced, making it possible to carry out good fluid transport over a long period of time.
次に本発明の実施例を図面に基づいて説明す
る。
Next, embodiments of the present invention will be described based on the drawings.
第１図及び第２図に示すように、筒状の弁箱１
に円盤状の回転弁体２を内装すると共に、弁体２
を開弁姿勢と閉弁姿勢とにわたつて回転操作する
弁棒３を弁箱１に貫通状に支承し、もつてバタフ
ライ弁を構成してある。 As shown in FIGS. 1 and 2, a cylindrical valve box 1
A disc-shaped rotary valve body 2 is installed inside the valve body 2.
A valve stem 3, which is rotatably operated between a valve opening position and a valve closing position, is supported through the valve body 1, thereby forming a butterfly valve.
第１図ないし第２図に示すように、回転弁体２
の上流側面のうち開弁姿勢において、下流側に寄
る側の半面部分には、その面部分に衝突する流体
を弁体２の回転軸芯Ｐにほぼ沿う方向で弁体２の
周縁側に案内し、かつ、分散するとヒダ状のガイ
ド４の複数を並設してあり、弁体２と管路内周壁
（弁箱内周壁）との間に形成されるスキマＡのう
ち巾の大きい部分A1に集中しがちな流体をヒダ
状ガイド４の作用で巾狭なスキマ部分A2に分散
案内することにより、集中した噴流が下流側に吐
出することを緩和してキヤビテーシヨンの発生を
抑制するようにしてある。 As shown in FIGS. 1 and 2, the rotary valve body 2
The half of the upstream side surface of the valve body that approaches the downstream side in the open position is provided with a half surface that guides the fluid that collides with that surface toward the peripheral edge of the valve body 2 in a direction substantially along the rotation axis P of the valve body 2. In addition, when dispersed, a plurality of fold-shaped guides 4 are arranged in parallel, and a wide portion A of the gap A formed between the valve body 2 and the inner circumferential wall of the pipe line (inner circumferential wall of the valve box) By dispersing and guiding the fluid that tends to concentrate in A 1 to the narrow gap part A 2 by the action of the pleated guide 4, it is possible to alleviate the concentrated jet flow from being discharged downstream and suppress the occurrence of cavitation. It is set as.
ヒダ状ガイド４は、弁体板面視において綾線が
「へ」の状の屈曲形状でほぼ弁体回転軸芯Ｐ方向
に延び、かつ、横断面形状において弁体回転軸芯
Ｐ側が垂壁状で弁体回転Ｐ側とは反対側が傾斜壁
状となる形状に形成してあり、又、弁体中心部か
ら弁体周縁部へ向うほどヒダ高さを高くしてあ
る。 The pleat-like guide 4 has a bent shape in which the twill lines are bent in the shape of "he" when viewed from the surface of the valve body, and extends approximately in the direction of the valve body rotation axis P, and has a vertical wall on the side of the valve body rotation axis P in the cross-sectional shape. The valve body is formed into a shape in which the side opposite to the rotation P side of the valve body has an inclined wall shape, and the height of the pleats increases from the center of the valve body toward the peripheral edge of the valve body.
回転弁体２の上流側面のうち、開弁姿勢におい
て上流側に寄る側の半面部分の周縁には、流体通
過に伴い弁体周縁部の下流側面近くで発生する渦
流を抑制するためのガイド溝５を並設してあり、
このガイド溝５は弁体周縁側ほど溝巾及び溝深さ
が大となるＶ字谷形状に形成してある。 On the periphery of the half of the upstream side of the rotary valve body 2 that is closer to the upstream side in the valve open position, there is a guide groove for suppressing the vortex generated near the downstream side of the valve body periphery as fluid passes through. 5 are installed in parallel,
The guide groove 5 is formed in a V-shaped valley shape in which the groove width and the groove depth become larger toward the peripheral edge of the valve body.
一方、回転弁体２の下流側面のうち開弁姿勢に
おいて上流側に寄る側の半面部分には、通過流体
を弁体回転軸芯Ｐ方向に分散させるよう案内作用
する下流側ヒダ状ガイド６の複数を並設してあ
り、前記の上流側ヒダ状ガイド４と下流側ヒダ状
ガイド６との協働作用、並びに、ガイド溝５の禍
流抑制作用をもつて、振動や弁・管路損傷の原因
となるキヤビテーシヨンを効果的に抑制するよう
にしてある。 On the other hand, on the half of the downstream side of the rotary valve body 2 that is closer to the upstream side in the valve open position, there is a downstream pleated guide 6 that acts to guide the passing fluid to be dispersed in the direction of the valve body rotation axis P. A plurality of them are arranged in parallel, and the cooperative action of the upstream pleated guide 4 and the downstream pleated guide 6, as well as the damage flow suppressing action of the guide groove 5, prevent vibrations and damage to valves and pipelines. It is designed to effectively suppress cavitation that causes .
下流側ヒダ状ガイド６は、弁体板面視において
綾線が弁体中心部から周縁部に向つて放射状に延
びるように配置してあり、又、弁体中心部から弁
体周縁部へ向うほどヒダ高さを高くしてある。 The downstream pleated guide 6 is arranged so that the twill lines extend radially from the center of the valve body toward the peripheral edge when viewed from the valve body plate side, and also extend from the center of the valve body toward the peripheral edge of the valve body. The height of the pleats is increased accordingly.
次に本発明の別実施例を説明する。 Next, another embodiment of the present invention will be described.
弁体２の上流側面に衝突する流体を弁体回転軸
芯Ｐにほぼ沿う方向で弁体２の周縁側に案内する
ガイド４を弁体上流側面の全面に形成しても良
い。 A guide 4 that guides the fluid colliding with the upstream side surface of the valve body 2 toward the peripheral edge of the valve body 2 in a direction substantially along the valve body rotation axis P may be formed on the entire surface of the upstream side surface of the valve body.
又、そのガイド４の具体的形状、並びに、弁体
２に対する付設構造は種々の改良が可能である。 Further, the specific shape of the guide 4 and the structure attached to the valve body 2 can be modified in various ways.
回転弁体２の下流側面に付設する通過流体ガイ
ド構造はどのようなものであつても良く、又、省
略しても良い。 The passing fluid guide structure attached to the downstream side surface of the rotary valve body 2 may be of any type, or may be omitted.
第１図ないし第８図は本発明の実施例を示し、
第１図は縦断面図、第２図は第１図における−
線断面図、第３図は弁体の上流側面図、第４図
は第３図における−線矢視図、第５図は第３
図における−線矢視図、第６図は第３図にお
ける−線矢視図、第７図は第３図における
−線断面図、第８図は弁体の下流側面図であ
る。
２……弁体、４……ガイド、Ｐ……回転軸芯。
1 to 8 show embodiments of the present invention,
Figure 1 is a vertical cross-sectional view, Figure 2 is a - in Figure 1.
3 is an upstream side view of the valve body, FIG. 4 is a view taken along the - line in FIG. 3, and FIG.
6 is a view taken along the - line in FIG. 3, FIG. 7 is a sectional view taken along the - line in FIG. 3, and FIG. 8 is a downstream side view of the valve body. 2... Valve body, 4... Guide, P... Rotating shaft core.
Claims (1)
軸芯Ｐにほぼ沿う方向で弁体２の周縁側に流体を
案内しかつ分散させるガイド４を設けたバタフラ
イ弁。1. A butterfly valve in which a guide 4 is provided on the upstream side of the rotary valve body 2 to guide and disperse fluid toward the peripheral edge of the valve body 2 in a direction substantially along the rotation axis P of the valve body 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17047786A JPS6326468A (en) | 1986-07-18 | 1986-07-18 | butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17047786A JPS6326468A (en) | 1986-07-18 | 1986-07-18 | butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6326468A JPS6326468A (en) | 1988-02-04 |
| JPH033098B2 true JPH033098B2 (en) | 1991-01-17 |
Family
ID=15905674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17047786A Granted JPS6326468A (en) | 1986-07-18 | 1986-07-18 | butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6326468A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02140081U (en) * | 1989-04-28 | 1990-11-22 | ||
| JP2003028312A (en) * | 2001-07-16 | 2003-01-29 | Toyo Valve Co Ltd | Valve element for butterfly valve |
| JP4817554B2 (en) * | 2001-09-03 | 2011-11-16 | 東洋バルヴ株式会社 | Butterfly valve disc |
| CN102840344B (en) * | 2012-08-07 | 2013-12-25 | 浙江理工大学 | Valve plate of butterfly valve based on reduction of cavitation damage |
| JP6640458B2 (en) * | 2015-03-27 | 2020-02-05 | 株式会社クボタ | Butterfly valve |
-
1986
- 1986-07-18 JP JP17047786A patent/JPS6326468A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6326468A (en) | 1988-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |