JPS60164073A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPS60164073A JPS60164073A JP1744084A JP1744084A JPS60164073A JP S60164073 A JPS60164073 A JP S60164073A JP 1744084 A JP1744084 A JP 1744084A JP 1744084 A JP1744084 A JP 1744084A JP S60164073 A JPS60164073 A JP S60164073A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- flow
- point
- upstream
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/222—Shaping of the valve member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、管路を流れる水、ガ入等の流体の流量をコ
ントロールするコントロール弁として用いられるバタフ
ライ弁に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a butterfly valve used as a control valve for controlling the flow rate of fluid such as water or gas flowing through a pipe.
周知のように、バタフライ弁は流体が静止している時は
流体圧によるトルクを受けることはないが、弁体が開き
流体が流れ出すと、流体よりトルりを受（する。このト
ルりは、ダイナミックトルクと一般に称せられているが
、かするダイナミックトルクが発生する原因は次のとお
りである。バタフライ弁を透明な材料で作って弁内の流
れを観察すると第６図のようであることが判明した。す
なわち、弁内の流れは弁の中心で分かれて上下のバルブ
開口から流れるのではの
なく、半径７約１／２〜１／３の点Ａで上下に分れ、１
Ａ点より下の部分は下の開口（オリアイス部）（１）よ
り下流へ行くが、Ａ点より上の部分は全て上の開口（ノ
ズル部）（２）へ行ってしまう。このため第１にノズル
部（２）へ向う流速は早く、静圧が低くなり、下流側死
水域の静圧に押されて弁体が閉じようとする力が発生す
る。第２にオリアイス部（１）に向う流れは、Ａ点でＵ
ターンして運動員の変化が大きくなるため、弁体を閉じ
ようと実る力が発生する。ダイナミックトルクはこの第
１と第２の力の複合したものである。As is well known, butterfly valves do not receive torque due to fluid pressure when the fluid is stationary, but when the valve body opens and fluid starts flowing out, it receives torque from the fluid. This torque is Although it is generally referred to as dynamic torque, the cause of the generation of dynamic torque is as follows.If you make a butterfly valve from a transparent material and observe the flow inside the valve, you will find that it is as shown in Figure 6. In other words, the flow inside the valve is not divided at the center of the valve and flows from the upper and lower valve openings, but is divided into upper and lower parts at point A, which is approximately 1/2 to 1/3 radius 7, and flows from the upper and lower valve openings.
The part below point A goes downstream from the lower opening (oriais part) (1), but the part above point A all goes to the upper opening (nozzle part) (2). For this reason, firstly, the flow velocity toward the nozzle portion (2) is high, the static pressure is low, and a force is generated that tends to close the valve body due to the static pressure of the downstream dead area. Second, the flow toward the Oriais part (1) is U at point A.
As the valve body turns and the change in movement becomes large, a force is generated to close the valve body. Dynamic torque is a composite of these first and second forces.
従来、か）るダイナミックトルクを小さくするいくつか
の提案がなされている。第３図乃至第５図はか）る提案
を例示するものであり、第３図の弁体はフィッシャー・
コントロール社の提案に係り、ノズル部側を肉厚にし弁
軸までの闇をくびれさすと共に、弁軸からオリアイス部
側までをくさび状にした形状を有する。１１４図の弁体
はメイソーネーラン社の提案に係り、弁軸からノズル部
側までを上流に向けて凹の円弧状にし、弁軸からオリア
イス部側までを逆に下流に向って凹の円孤形状にする。Conventionally, several proposals have been made to reduce such dynamic torque. Figures 3 to 5 illustrate this proposal, and the valve body in Figure 3 is a Fischer valve.
Proposed by Control Co., Ltd., the nozzle side is made thicker to narrow the darkness up to the valve stem, and it has a wedge-shaped shape from the valve stem to the oriice side. The valve body shown in Fig. 114 was proposed by Meithor-Neilan, and has a concave arc shape facing upstream from the valve stem to the nozzle side, and a concave arc shape facing downstream from the valve stem to the Oriais side. Make it.
又、１５図の弁体はポーマン社の提案に係り、上流に向
って逆く字状に屈曲させた形状を有する。Further, the valve body shown in FIG. 15 is proposed by Pomann and has a shape bent in an inverted dogleg shape toward the upstream side.
これら３つの提案に係る弁体は、いずれも弁体を曲げて
流れを上流側に投げ返し、その運動量の変化で弁体を開
ける方向に働かせることによって、前記第１の力と相殺
させようとするものであり、第１の力の作用を解決する
には有効である。しかしながら、第２の力に対しては手
を打っていない為に、ダイナミックトルクを完全に消去
することが出来ない欠点があった。The valve bodies according to these three proposals all attempt to offset the first force by bending the valve body to throw the flow back upstream and using the change in momentum to act in the direction of opening the valve body. This is effective in solving the effect of the first force. However, since no action was taken against the second force, there was a drawback that the dynamic torque could not be completely eliminated.
この発明は、従来提案のダイナミックトルクを減少しよ
うとする弁体にみられた前記の如き欠点を解消せんとす
るものであって、ダイナミックトルクを構成する第１の
力と相殺する力を発生すると共に、第２の力を出来るだ
け小さくし、全体としてダイナミックトルクを更に減少
させることを技術的課題とする。The present invention aims to eliminate the above-mentioned drawbacks of conventionally proposed valve bodies that attempt to reduce dynamic torque. At the same time, the technical problem is to make the second force as small as possible and to further reduce the dynamic torque as a whole.
か）る技術的課題を解決するために講じた技術的手段は
、弁体をＡ点で折曲げてＡ点よりオリフィス側を下流側
に曲げると共に、ノズル部近傍を上流側に曲げることに
ある。か・る技術的手段により、本発明の弁体は次のよ
うに作用する。弁体にぶつかった上流からの流れは、Ａ
点でオリフィス側へ行く流れ（１）と、ノズル側へ行く
流れ（ＩＩ）に分かれる。流れ（１）は、弁体がＡ点で
下流側に折曲りでいりる為に、流れのさくなり、流れ（
１）によって弁体を閉じる方向へ働くダイナミックトル
クが小さくなる。又、流れ（ｎ）は、弁体がＢ、直で上
流側に曲がっている為、流れの方向が反転させられて運
動量の変化が生じ、弁体を押す力が発生して弁体を開か
せようとする。か）る２つの流れ（１）（ｎ）の作用に
より、流体が弁体を閉じさせようとするダイナミックト
ルクは、従来の弁体に比して者しく減少する。The technical means taken to solve this technical problem consists in bending the valve body at point A, bending the orifice side downstream from point A, and bending the vicinity of the nozzle section upstream. . By means of such technical means, the valve body of the present invention operates as follows. The flow from upstream that hits the valve body is A
At this point, the flow is divided into a flow (1) going toward the orifice side and a flow (II) going toward the nozzle side. Flow (1) becomes slow because the valve body bends toward the downstream side at point A, and the flow (
1) reduces the dynamic torque acting in the direction of closing the valve body. In addition, since the flow (n) is bent toward the upstream side at B, the direction of the flow is reversed and a change in momentum occurs, generating a force that pushes the valve body and opening it. try to make it happen Due to the action of these two flows (1) and (n), the dynamic torque by which the fluid tends to close the valve body is significantly reduced compared to the conventional valve body.
以上により、この発明のバタフライ弁にあっては、ダイ
ナミックトルクの減少により、弁を駆動するアクチュエ
ーターが小さなもので充分となり安価になると共に、駆
動エネルギーも少なく省エネルギーを図れる。又、ダイ
ナミックトルクが小さいため、バルブの位置がつぶれる
ことやハンチングすることが少なくなり、弁の制御性が
向上する。As described above, in the butterfly valve of the present invention, since the dynamic torque is reduced, it is sufficient to use a small actuator for driving the valve, which makes the butterfly valve less expensive, and also requires less driving energy, resulting in energy savings. Furthermore, since the dynamic torque is small, the valve position is less likely to collapse or hunt, and the controllability of the valve is improved.
次にこの発明の具体例を第１図を参照しっ）詳細に説明
する。図において（１０）は円筒状の本体、（１１）は
該本体（１０）内に弁軸（１２）で回動自在に支持され
た円盤状の弁体である。弁体（１１）は、弁軸（１２）
からオリフィス側の半径の約１／２〜１／３の、貞Ａで
上流側に凸に折曲げられ、Ａ点よりオリフィス側を下流
側に曲げる。又、ノズル部近傍の点Ｂよりノズル側を上
流側に向って凸に折曲げる。尚、Ｂ点から上部の折曲げ
形状は上流側に向って凸とせず、第２図（Ａ’）に示す
ように凹としても良い。要するにＢ点よｔ）上部におい
て流れの方向を反転させ運動量は変化が生じ得るような
形状であれば良い。Next, a specific example of the present invention will be explained in detail with reference to FIG. In the figure, (10) is a cylindrical main body, and (11) is a disc-shaped valve body rotatably supported within the main body (10) by a valve shaft (12). The valve body (11) is connected to the valve stem (12)
It is bent convexly upstream at a radius of about 1/2 to 1/3 of the radius on the orifice side from point A, and the orifice side is bent downstream from point A. Further, the nozzle side is bent convexly toward the upstream side from point B near the nozzle portion. Incidentally, the bent shape of the upper part from point B may not be convex toward the upstream side, but may be concave as shown in FIG. 2 (A'). In short, any shape is sufficient as long as the flow direction is reversed at the upper part of point B and the momentum can be changed.
Ａ点及びＢ点側の折曲げ形状は第１図に示すような直線
的である必要はなく、第２図（Ｂ）に示すように曲線的
に形成してもよく、又、第３図（Ｃ）に示すように上下
対称に折曲げても良い。The bent shape on the A point and B point sides does not have to be linear as shown in FIG. 1, but may be curved as shown in FIG. It may also be bent vertically symmetrically as shown in (C).
更に、Ａ点及びＢ点の折曲形状を形成するために、弁体
下流面の肉抜きを行い、弁体の軽量化、コスト低減を図
ることは有益である。Furthermore, in order to form the bent shape at points A and B, it is beneficial to reduce the thickness of the downstream face of the valve body, thereby reducing the weight and cost of the valve body.
以上の説明は、弁体（１１）は角度を有して本体（１０
）に接触するアングルタッチ形式のものについて述べた
が、これに限られないことは勿論であり、弁体（１１）
が本体（１０）Ｉこ直角に接触するグンバー形式のもの
であっても良い。In the above explanation, the valve body (11) has an angle and the main body (10
), but it is of course not limited to this, and the valve body (11)
It may be of the gunbar type, in which the main body (10) contacts at right angles to the main body (10).
＃ＩＪ１図はこの発明に係るバタフライ弁であって、本
体を断面して示す、第２図は変形に係る弁体の側面図、
第３．４．５図は従来の弁体の側面図、１６図は従来の
バタフライ弁におけ流体の流動状態を示す概念図である
。
（１）・・・オリフィス部 （２）・・・ノズル部（１
０）・・・本体 （１１）・・・弁体第１図
に
第２図
（Ａ） （Ｂ） （Ｃ）
手続補正書（方式）
特許庁長官 若杉和夫殿
１、事件の表示
昭和５９年特許願ｗＪ１７４４０号
２、発明の名称
バタフライ弁
３、補正を動る者
事件との関係 特許出願人
住所 大阪市東大阪市本庄中２丁目９１番地の１名称
株式会社 巴技術研究所
代表取締役 山 本 晃 敏
４、代理人
住所 東京都千田区麹町４丁目１番地
昭和５９年４月４日（４月２４日発送）６、補正の対象
明細書
７、補正の内容
別紙のとおり#IJ1 is a butterfly valve according to the present invention, showing the main body in cross section, FIG. 2 is a side view of a modified valve body,
3.4.5 is a side view of a conventional valve body, and FIG. 16 is a conceptual diagram showing a fluid flow state in a conventional butterfly valve. (1)... Orifice part (2)... Nozzle part (1
0) Main body (11) Valve body Figure 1 and Figure 2 (A) (B) (C) Procedural amendment (formality) Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case 1982 Patent application wJ17440 No. 2, name of the invention Butterfly valve 3, relationship with the amendment case Patent applicant address 1 name, 2-91 Honjo Naka, Higashiosaka City, Osaka City
Representative Director of Tomoe Technical Institute Co., Ltd. Akitoshi Yamamoto 4, Agent address: 4-1 Kojimachi, Senda-ku, Tokyo April 4, 1980 (Shipped on April 24) 6, Statement subject to amendment 7, Amendment As per the attached sheet
Claims (6)
向に曲げると共に、ノズル部近傍を流体が上流方向に反
転する形状に曲げたことを特徴とするバタフライ弁。(1) A butterfly valve characterized in that when the valve is opened, the flow from upstream is bent toward the downstream direction toward the oriice portion, and the vicinity of the nozzle portion is bent into a shape in which the fluid is reversed toward the upstream direction.
状をなしていることを特徴とする特許請求の範囲第１項
記載のバタフライ弁。(2) The butterfly valve according to claim 1, wherein the new curved shape near the nozzle portion is convex toward the upstream side.
第１項記載のバタフライ弁。(3) The butterfly valve according to claim 1, wherein the bent shape in the vicinity of the nozzle portion has a concave shape toward the upstream side.
が上下対称であることを特徴とする特許請求の範囲第１
項記載のバタフライ弁。(4) Claim 1, characterized in that the bent shape at point A and the bent shape near the nozzle portion are vertically symmetrical.
Butterfly valve as described in section.
求の範囲第１項、第２項、第３項又は第４項記載のバタ
フライ弁。(5) The butterfly valve according to claim 1, 2, 3, or 4, wherein the bent shape is linear.
求の範囲第１項、第２項、第３項又は第４項記載のバタ
フライ弁。(6) The butterfly valve according to claim 1, 2, 3, or 4, wherein the bent shape is curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1744084A JPS60164073A (en) | 1984-02-01 | 1984-02-01 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1744084A JPS60164073A (en) | 1984-02-01 | 1984-02-01 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60164073A true JPS60164073A (en) | 1985-08-27 |
Family
ID=11944081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1744084A Pending JPS60164073A (en) | 1984-02-01 | 1984-02-01 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60164073A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0456547U (en) * | 1990-09-25 | 1992-05-14 | ||
| JP2003074719A (en) * | 2001-09-03 | 2003-03-12 | Toyo Valve Co Ltd | Valve element for butterfly valve |
| WO2009016756A1 (en) * | 2007-08-01 | 2009-02-05 | Tomoe Technical Research Company Ltd. | Cavitation preventive high differential pressure control valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874969A (en) * | 1981-10-22 | 1983-05-06 | ハンス・デイ−・パウマン | Low-torque butterfly valve disk |
-
1984
- 1984-02-01 JP JP1744084A patent/JPS60164073A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874969A (en) * | 1981-10-22 | 1983-05-06 | ハンス・デイ−・パウマン | Low-torque butterfly valve disk |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0456547U (en) * | 1990-09-25 | 1992-05-14 | ||
| JP2003074719A (en) * | 2001-09-03 | 2003-03-12 | Toyo Valve Co Ltd | Valve element for butterfly valve |
| WO2009016756A1 (en) * | 2007-08-01 | 2009-02-05 | Tomoe Technical Research Company Ltd. | Cavitation preventive high differential pressure control valve |
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