JPS6326468A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPS6326468A JPS6326468A JP17047786A JP17047786A JPS6326468A JP S6326468 A JPS6326468 A JP S6326468A JP 17047786 A JP17047786 A JP 17047786A JP 17047786 A JP17047786 A JP 17047786A JP S6326468 A JPS6326468 A JP S6326468A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- fluid
- guide
- guides
- pleat
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000013459 approach Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
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、キャビテーシ
ョ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、キャビテーションを抑制するに、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60−4
4673号公報参照)。Conventionally, to suppress cavitation, rectifiers of various shapes were installed in the pipeline downstream of the valve body (
For example, Japanese Utility Model Publication No. 44-2616, Japanese Unexamined Patent Publication No. 60-4
(See Publication No. 4673).
しかし、従来の構造では未だ十分にキャビテーションを
抑制できず、改善の余地があった。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
周縁側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 structure of the butterfly valve according to the present invention is that a guide is provided on the upstream side of the rotary valve body to guide and disperse fluid toward 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
キャビテーショ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.
したがって、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、
(すなわち、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ャビテ
ーショ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
キャビテーショ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 a direction substantially along the rotation axis of the valve body.
(that is, to the side of the narrow part of the gap formed between the rotary valve body and the inner circumferential wall of the pipe line) and disperse the gap between the valve body and the inner circumferential wall of the pipe line. It can fundamentally alleviate the cause of cavitation, which is the concentration of fluid in the wide part near the center of the valve body, and is more effective at reducing cavitation than the conventional structure, which only rectifies the flow downstream of the valve body. can be suppressed.
その結果、キャビテーショ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った。As a result, noise generation due to cavitation and damage to valves and pipelines can be greatly reduced, allowing for 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って回転操作する弁棒(3
)を弁箱(1)に貫通状に支承し、もって、バタフライ
弁を構成しである。As shown in Figs. 1 and 2, a disc-shaped rotary valve body (2) is installed inside a cylindrical valve box (1), and the valve body (2) is extended between a valve opening position and a valve closing position. Rotating valve stem (3
) is supported in the valve box (1) in a penetrating manner, thereby forming a butterfly valve.
第1図ないし第8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(
AI)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ャ
ビテーションの発生を抑制するようにしである。As shown in FIGS. 1 to 8, in the valve open position of the upstream side surface of the rotary valve body (2), the half surface of the rotary valve body (2) that approaches the downstream side is designed to prevent fluid that collides with the half surface of the valve body (2). A plurality of pleat-like guides (4) are arranged in parallel to guide and disperse the valve body (2) toward the peripheral edge of the valve body (2) in a direction substantially along the rotation axis (P) of the valve body (2). ) and the inner circumferential wall of the pipeline (inner circumferential wall of the valve box).
By dispersing and guiding the fluid that tends to concentrate in the AI) to the narrow gap part (A2) by the action of the pleated guide (4), the concentrated jet flow is prevented from being discharged downstream and cavitation occurs. The purpose is to suppress this.
ヒダ状ガイド(4)は、弁体板面視において稜線が「へ
」の字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である。The pleat-like guide (4) has a curved shape with a ridge line shaped like a "he" when viewed from the surface of the valve body, and extends approximately in the direction of the valve body rotation axis (P), and is aligned with the valve body rotation axis (P) in a cross-sectional shape. The (P) side is shaped like a hanging wall, and the side opposite to the rotating (P) side of the valve body is shaped like an inclined wall, and the height of the pleats increases from the center of the valve body toward the periphery of the valve body. It is.
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I (5)
は弁体周縁側はど溝巾及び溝深さが大となるV字谷形状
に形成しである。On the periphery of the half of the upstream side surface of the rotary valve body (2) that is closer to the upstream side in the valve open position, there is a guide for suppressing the vortex generated near the downstream side of the valve body periphery as fluid passes. Grooves (5) are arranged in parallel, and this guide I (5)
It is formed in a V-shaped valley shape in which the groove width and groove depth are larger on the peripheral edge side of the valve body.
一方、回転弁体(2)の下流側面のうち閉弁姿勢におい
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に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)の渦流抑制作用をも
って、振動や弁・管路損傷の原因となるキャビテーショ
ンを効果的に抑制するようにしである。On the other hand, the half of the downstream side of the rotary valve body (2) that approaches the upstream side in the valve closed position has a downstream side that acts to guide the passing fluid so as to disperse it in the direction of the valve body rotation axis (P). A plurality of pleated guides (6) are arranged in parallel, and the upstream pleated guide (4) and the downstream pleated guide (6) cooperate to suppress the vortex flow in the guide groove (5). This action effectively suppresses cavitation, which causes vibration and damage to valves and pipes.
下流側ヒダ状ガイド(6)は、弁体板面視において稜線
が弁体中心部から周縁部に向っ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である。The downstream pleated guide (6) is arranged so that the ridgeline extends radially from the center of the valve body toward the periphery when viewed from the valve body plate, and also extends from the center of the valve body to the periphery of the valve body. The farther you go, the higher the folds become.
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輪芯(
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。The fluid colliding with the upstream side of the valve body (2) is transferred to the valve body rotating ring core (
A guide (4) for guiding toward the peripheral edge of the valve body (2) in a direction substantially along 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。Also, the specific shape of the guide (4) and 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っても良く、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IV
−IV線矢視図、第5図は第3図におけるV−V線矢視
図、第6図は第3図におけるvr−vr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)・・・・・・回転輪芯。1 to 8 show embodiments of the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is an upstream side view of the valve body. Figure 4 shows the IV in Figure 3.
-IV line arrow view, Figure 5 is a V-V line arrow view in Figure 3, Figure 6 is a vr-vr line arrow view in Figure 3, Figure 7
The figure 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 wheel core.
Claims (1)
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。A guide (4) is provided on the upstream side of the rotary valve body (2) to guide and disperse the fluid toward the peripheral edge of the valve body (2) in a direction substantially along the rotation axis (P) of the valve body (2). Butterfly valve installed.
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 true JPS6326468A (en) | 1988-02-04 |
JPH033098B2 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) |
Cited By (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 |
JP2003074719A (en) * | 2001-09-03 | 2003-03-12 | Toyo Valve Co Ltd | Valve element for butterfly valve |
CN102840344A (en) * | 2012-08-07 | 2012-12-26 | 浙江理工大学 | Valve plate of butterfly valve based on reduction of cavitation damage |
JP2016183772A (en) * | 2015-03-27 | 2016-10-20 | 株式会社クボタ | Butterfly valve |
-
1986
- 1986-07-18 JP JP17047786A patent/JPS6326468A/en active Granted
Cited By (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 |
JP2003074719A (en) * | 2001-09-03 | 2003-03-12 | Toyo Valve Co Ltd | Valve element for butterfly valve |
CN102840344A (en) * | 2012-08-07 | 2012-12-26 | 浙江理工大学 | Valve plate of butterfly valve based on reduction of cavitation damage |
JP2016183772A (en) * | 2015-03-27 | 2016-10-20 | 株式会社クボタ | Butterfly valve |
Also Published As
Publication number | Publication date |
---|---|
JPH033098B2 (en) | 1991-01-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |