JPH07229567A - Valve element for butterfly valve - Google Patents

Valve element for butterfly valve

Info

Publication number
JPH07229567A
JPH07229567A JP2063294A JP2063294A JPH07229567A JP H07229567 A JPH07229567 A JP H07229567A JP 2063294 A JP2063294 A JP 2063294A JP 2063294 A JP2063294 A JP 2063294A JP H07229567 A JPH07229567 A JP H07229567A
Authority
JP
Japan
Prior art keywords
disc
fluid passage
valve body
valve
main 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
Application number
JP2063294A
Other languages
Japanese (ja)
Inventor
Koichi Hisada
幸一 久田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tomoe Technical Research Co Ltd
Original Assignee
Tomoe Technical Research Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tomoe Technical Research Co Ltd filed Critical Tomoe Technical Research Co Ltd
Priority to JP2063294A priority Critical patent/JPH07229567A/en
Publication of JPH07229567A publication Critical patent/JPH07229567A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide a valve element for a butterfly valve by which minute flow rate control can be carried out by means of simple constitution in which a driving unit of a conventional rotary valve can be directly utilized. CONSTITUTION:A main valve element 1 is supported in a valve rod 2 rotationally, plural fluid passage holes 3, 4 are arranged, and disc 5 is rotationally supported in a rotational center shaft 6 on the main valve element 1 back face along the back face of the main valve element L In the disc 5, plural fluid passage holes 3a, 4a are also arranged in positions, in which they can be matched with the fluid passage holes 3, 4 of the main valve element L so as to be directly rotated by the valve rod 2 via bevel gears 7, 7a, while the main valve element 1 is rotated by the valve rod 2 via the disc 5 on the basis of abutting engagement between stoppers 8, 9 individually arranged in the disc 5 and the main valve element 1. In this way, in the vicinity of a full close position of the main valve element 1, a minute flow rate is controlled by matching based on the rotation of the disc 5 between the fluid passage hole 3 and the fluid passage hole 3a and between the fluid passage hole 4 and the fluid passage hole 4a.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、大流量を流すが微少流
量制御をも可能とするバタフライ弁の弁体に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body of a butterfly valve which allows a large flow rate but also a minute flow rate control.

【0002】[0002]

【従来の技術】従来、バタフライ弁は、弁棒に取付けら
れた弁体が本体(弁本体)内で、弁開度が0°の全閉位
置から弁開度が90°の全開位置まで回動され、管路
(配管)内の流体の流量を制御するようになっている
が、一般に容量が大きいことが特徴で、微少流量制御に
は適しないとされてきた。このことは、図5に示す縦軸
に流量をとり横軸に弁開度をとった流量特性線図に示さ
れている。即ち、同図における曲線は、従来のコント
ロール用のバタフライ弁の流量特性曲線で、弁体周面と
本体内面とがメタル接触しているため、全閉状態で流体
の洩れ(リーク)が生じ、また、弁開度Bの範囲で流量
変化が急激になっており、従ってこの微少流量範囲での
制御が不能である。
2. Description of the Related Art Conventionally, in a butterfly valve, a valve element attached to a valve rod is rotated in a main body (valve main body) from a fully closed position with a valve opening of 0 ° to a fully open position with a valve opening of 90 °. It is operated to control the flow rate of the fluid in the pipe (piping), but it is generally characterized by its large capacity and is not suitable for minute flow rate control. This is shown in the flow rate characteristic diagram in which the vertical axis shows the flow rate and the horizontal axis shows the valve opening. That is, the curve in the figure is a flow rate characteristic curve of a conventional butterfly valve for control. Since the valve body peripheral surface and the inner surface of the main body are in metal contact, fluid leakage (leak) occurs in the fully closed state, Further, the flow rate changes drastically in the range of the valve opening B, so that control in this minute flow rate range is impossible.

【0003】また、曲線は、本体内面にゴムシートを
張設した従来のゴムシート型式のバタフライ弁の流量特
性曲線で、全閉時、弁体周面と本体内面に張設されたゴ
ムシートとが密接するようになっているため、弁閉鎖
時、ゴムシートに弁体周面が食い込んでいる間、弁開度
Aの不感帯(弁開度に拘らず流量が零の状態の帯域)が
生じ、またこの不感帯Aの範囲と流量変化の急激なCの
範囲では、流量制御が不能であった。
Further, the curve is a flow rate characteristic curve of a conventional rubber sheet type butterfly valve in which a rubber sheet is stretched on the inner surface of the main body, and when fully closed, a rubber sheet stretched on the peripheral surface of the valve body and the inner surface of the main body. Are in close contact with each other, so that when the valve is closed, the dead zone of the valve opening A (the zone where the flow rate is zero regardless of the valve opening) is generated while the peripheral surface of the valve body bites into the rubber sheet. Further, in the range of the dead zone A and the range of C in which the flow rate changes rapidly, the flow rate control was impossible.

【0004】[0004]

【発明が解決しようとする課題】上記のように、従来の
バタフライ弁は、制御可能な小〜中流量範囲でも、その
流量特性は、全閉から開き始める時一気に流量がふえて
しまうという、イコールパーセンテージ特性であり、制
御しにくい範囲が存在したし、また、小流量制御を行な
うと弁体周辺部に流体エネルギが集中し、シール部であ
る弁体エッジや弁座、下流側管壁にキャビテーション、
エロージョン等による破損発生の恐れがあった。
As described above, the conventional butterfly valve has an equal flow rate characteristic in that the flow rate characteristic suddenly increases when the valve starts to be opened from the fully closed state even in the controllable small to medium flow rate range. Since it is a percentage characteristic, there was a range that was difficult to control, and when small flow rate control was performed, fluid energy was concentrated around the valve body, causing cavitation on the valve body edge, which is the seal part, the valve seat, and the downstream pipe wall. ,
There was a risk of damage due to erosion.

【0005】上記の欠点を除去するために、大きなバタ
フライ弁弁体の中央に小さなバタフライ弁を設け、両弁
体を、それぞれ円筒軸とその内部に挿通した回転軸とに
よって別々に独立して開閉させるようにした主副2軸バ
タフライ弁が開発されて実用化されている(特開昭48
−13922号公報、実開昭48−15613号公報参
照)が、これらのものは、弁棒が二重構造となっていて
機構が複雑であるばかりでなく、駆動部も独立して二つ
必要となり、特殊構造になるため、汎用として利用でき
ないという問題点があった。
In order to eliminate the above drawbacks, a small butterfly valve is provided in the center of a large butterfly valve body, and both valve bodies are independently opened and closed by a cylindrical shaft and a rotary shaft inserted therein. A main / sub two-axis butterfly valve designed to be used has been developed and put into practical use (Japanese Patent Laid-Open No. 48-4848)
No. 13922 gazette and Japanese Utility Model Application Laid-Open No. 48-15613 gazette), these not only complicate the mechanism due to the double structure of the valve stem, but also require two independent drive parts. Since it has a special structure, it cannot be used as a general purpose.

【0006】本発明は、上記した従来技術の問題点を解
決するものであって、駆動部の構造も従来と変わらない
簡単な構成により、微少流量制御も可能なバタフライ弁
の弁体を提供することを目的としている。
The present invention solves the above-mentioned problems of the prior art, and provides a valve element of a butterfly valve capable of controlling a minute flow rate with a simple structure in which the drive unit is the same as the conventional structure. Is intended.

【0007】[0007]

【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、2枚の弁体を組合わせて構成したバタ
フライ弁の弁体において、弁棒に回動可能に支持された
主弁体に1個以上の流体通過穴を設けると共に、該流体
通過穴と整合できるように穿設された1個以上の流体通
過穴を有する円板を、上記主弁体に回転可能に支持し、
該円板を弁棒によって直接回転駆動すると共に、該円板
を介して上記主弁体を回動するようにし、上記主弁体と
円板にそれぞれ穿設された両流体通過穴を整合させるこ
とによって微少流量制御を可能としたことを特徴として
いる。
In order to achieve the above object, the present invention has a valve body of a butterfly valve constructed by combining two valve bodies, which is rotatably supported by a valve rod. At least one fluid passage hole is provided in the main valve body, and a disc having at least one fluid passage hole formed so as to be aligned with the fluid passage hole is rotatably supported on the main valve body. Then
The disc is directly rotated by a valve rod, and the main valve body is rotated through the disc to align the fluid passage holes formed in the disc with the main valve body. Therefore, it is possible to control a minute flow rate.

【0008】また、主弁体に回転可能に支持された円板
を、主弁体の裏面に沿って、傘歯車を介し弁棒によって
直接回転駆動するようにしたことを特徴としている。
Further, it is characterized in that the disc rotatably supported by the main valve body is directly rotationally driven by the valve rod along the back surface of the main valve body via the bevel gear.

【0009】また、弁棒によって直接回転駆動される1
個以上の流体通過穴を有する円板と、1個以上の流体通
過穴を有する主弁板とを、それぞれに設けられたストッ
パを互いに当接係合させることによって、主弁体を、円
板を介し弁棒によって回動させるようにしたことを特徴
としている。
In addition, 1 which is directly driven to rotate by a valve rod
A disc having a plurality of fluid passage holes and a main valve disc having one or more fluid passage holes are brought into contact with and engaged with stoppers respectively provided on the disc to form a disc. It is characterized in that it is adapted to be rotated by a valve rod through.

【0010】[0010]

【作用】本発明は上記のように構成されているので、弁
体の全閉状態においては、主弁体の流体通過穴と円板の
流体通過穴とは整合されず、弁体外周部と本体内面の弁
座とが密接してシールするようになっているので、洩れ
(リーク)零が保持される。
Since the present invention is configured as described above, in the fully closed state of the valve body, the fluid passage hole of the main valve body and the fluid passage hole of the disc are not aligned, and the outer periphery of the valve body is Since the valve seat on the inner surface of the main body is closely contacted and sealed, zero leakage is maintained.

【0011】次いで、弁開方向に弁棒を回転させると、
該弁棒と連動して、主弁体に支持された状態で円板が回
転し(なお、この状態では主弁体は未だ閉じてい
る。)、該円板に設けられた流体通過穴と主弁体に設け
られた流体通過穴とが互いに整合(一致)する位置にく
ると、これらの両流体通過穴を通って、全閉近傍の微少
流量も含めて小流量での制御が行われる。
Then, when the valve rod is rotated in the valve opening direction,
The disc rotates in conjunction with the valve rod while being supported by the main valve body (note that the main valve body is still closed in this state), and the fluid passage hole provided in the disc. When it reaches a position where the fluid passage holes provided in the main valve body are aligned (matched) with each other, control is performed at a small flow rate, including the minute flow rate near the fully closed position, through these fluid passage holes. .

【0012】更に、円板が弁棒によって所定角度回転さ
れると、該円板と上記主弁体にそれぞれ設けられた両ス
トッパ等の当接係合により、主弁体が両流体通過穴を整
合した状態を維持したまま、該円板を介して開方向に回
動し、やがて全開位置に達する。
Further, when the disc is rotated by a predetermined angle by the valve rod, the main valve disc is brought into contact with both the fluid passage holes by abutting engagement between the disc and both stoppers provided on the main valve disc. While maintaining the aligned state, it rotates in the opening direction through the disc and eventually reaches the fully opened position.

【0013】他方、弁体を全開位置から閉方向に回動さ
せる場合は、弁棒を上記とは逆方向に回転させることに
より、弁体は閉方向に回動し、全閉位置の手前で円板及
び主弁体の双方に設けられた流体通過穴が整合するよう
になっているので、微少流量の制御を経て全閉状態とな
り、洩れが零となる。
On the other hand, when the valve body is rotated in the closing direction from the fully open position, the valve body is rotated in the opposite direction by rotating the valve rod in the direction opposite to the above direction, and the valve body is rotated in the closing direction and before the fully closed position. Since the fluid passage holes provided in both the disc and the main valve body are aligned with each other, a fully closed state is achieved through the control of the minute flow rate, and the leakage is zero.

【0014】[0014]

【実施例】次に、本発明の実施例を図面と共に説明す
る。図1は、本発明の一実施例を示すバタフライ弁の弁
体の縦断面図である。
Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical sectional view of a valve body of a butterfly valve showing an embodiment of the present invention.

【0015】図において、主弁体1は、弁棒2に回転可
能に支持されており、図示のものは管軸x−xに直交す
る位置即ち全閉状態に位置されている。該主弁体1に
は、1個以上(図では2個)の流体通過穴3,4が穿設
されており、該主弁体1の裏面に沿って円板5が、主弁
体1の裏面に形成された該円板5の回転中心軸6に回転
可能に支持されている。そして該円板5にも、上記主弁
体1の流体通過穴3,4と整合できる位置に、1個以上
(図では2個)の流体通過穴3a,4aが穿設されてお
り、該円板5は、弁棒2にキー等によって固定された傘
歯車7とかみ合う傘歯車7aを介し、弁棒2によって直
接回転駆動されるようになっている。また上記円板5に
は、ストッパ8が突設されており、該ストッパ8は、主
弁体1に設けられたストッパ9と当接係合して、該主弁
体1が円板5を介し弁棒2によって回動されるようにな
っている。
In the figure, a main valve body 1 is rotatably supported by a valve rod 2, and the shown one is located at a position orthogonal to a pipe axis xx, that is, in a fully closed state. One or more (two in the figure) fluid passage holes 3 and 4 are bored in the main valve body 1, and a disc 5 is provided along the back surface of the main valve body 1 so that It is rotatably supported by the rotation center shaft 6 of the disk 5 formed on the back surface of the disk. The disc 5 is also provided with one or more (two in the figure) fluid passage holes 3a, 4a at positions that can be aligned with the fluid passage holes 3, 4 of the main valve body 1. The disc 5 is directly driven to rotate by the valve rod 2 via a bevel gear 7a that meshes with a bevel gear 7 fixed to the valve rod 2 by a key or the like. A stopper 8 is projectingly provided on the disc 5, and the stopper 8 abuts and engages with a stopper 9 provided on the main valve body 1 so that the main valve body 1 can move the disc 5 to the disk 5. It is adapted to be rotated by the valve rod 2 via the.

【0016】図2は、図1の円板5の矢印A方向からみ
た正面図であり、図3は、主弁体1の矢印B方向からみ
た正面図である。
FIG. 2 is a front view of the disc 5 of FIG. 1 as viewed in the direction of arrow A, and FIG. 3 is a front view of the main valve body 1 as viewed in the direction of arrow B.

【0017】上記した流体通過穴3,4,3a,4aの
穴の大きさ、位置関係及び穴の数を自由に設計すること
により、微少流量や、弁体の回転角度と流量との関係を
設計者の意図通りに、図5の曲線やのように、実現
することができる。
By freely designing the size, positional relationship and the number of holes of the fluid passage holes 3, 4, 3a, 4a described above, the minute flow rate and the relationship between the flow angle and the flow rate of the valve body can be determined. It can be realized as the designer intends, like the curve in FIG.

【0018】なお、図1において、流体通過穴3と3a
及び4と4aが互いに対向した整合位置に図示されてい
るが、これは、主弁体1が全閉位置にあってなお且つ上
記流体通過穴を通って微少流量が流れる位置を示してい
る。
In FIG. 1, the fluid passage holes 3 and 3a are shown.
And 4 and 4a are shown in an aligned position facing each other, which shows a position where the main valve body 1 is in the fully closed position and a minute flow rate flows through the fluid passage hole.

【0019】次に、作用について説明すると、主弁体1
の全閉状態においては、主弁体1と円板5の両流体通過
穴3と3a及び4と4aは整合されないようになってお
り、また主弁体1外周部と図示しない本体内面に張設さ
れたシール部(弁座)とが密接して洩れ零としている。
Next, the operation will be described. The main valve body 1
In the fully closed state, the fluid passage holes 3 and 3a and 4 and 4a of the main valve body 1 and the disc 5 are not aligned with each other, and the outer peripheral portion of the main valve body 1 and the inner surface of the main body (not shown) are stretched. The seal part (valve seat) provided is in close contact with it to prevent zero leakage.

【0020】次いで、弁棒2を弁開方向に回転させる
と、該弁棒2の回転力は傘歯車7を介して円板5を、主
弁体1の回転中心軸6を支軸として回転させるが、この
ときは未だ主弁体1は回転しないので、主弁体1及び円
板5にそれぞれ穿設された流体通過穴3と3a及び4と
4aは、図3に示すように互いに接近して整合し、これ
らの両流体通過穴を通して流体が流れるが、このときの
流量は、弁棒2従って円板5の回転角度によって微少流
量が制御される。
Next, when the valve rod 2 is rotated in the valve opening direction, the rotational force of the valve rod 2 rotates the disc 5 through the bevel gear 7 and the rotation center shaft 6 of the main valve body 1 as a spindle. However, at this time, since the main valve body 1 does not rotate yet, the fluid passage holes 3 and 3a and 4 and 4a formed in the main valve body 1 and the disc 5, respectively, approach each other as shown in FIG. Then, the fluid flows through both of these fluid passage holes, and the flow rate at this time is controlled by the rotation angle of the valve rod 2 and thus the disc 5 to be a minute flow rate.

【0021】更に、弁棒2によって円板5を一定角度回
転させると、円板5のストッパ8が主弁体1のストッパ
9と当接係合し、以後弁棒2の回転力は、主弁体1と円
板5を一体として弁棒2を中心に主弁体1を回動させ、
大きな通過面積をもたらし、通常のバタフライ弁と同様
に、主弁体1の弁開度に応じて管路内の流体の流れ(流
量)を制御する。このときの流量特性は、図5の曲線
とに示されている。
Further, when the disc 5 is rotated by a certain angle by the valve rod 2, the stopper 8 of the disc 5 abuts and engages with the stopper 9 of the main valve body 1, and thereafter, the rotational force of the valve rod 2 becomes main. The valve body 1 and the disc 5 are integrated to rotate the main valve body 1 around the valve rod 2,
A large passage area is provided, and the flow (flow rate) of the fluid in the pipeline is controlled according to the valve opening degree of the main valve body 1 as in a normal butterfly valve. The flow rate characteristic at this time is shown by the curve in FIG.

【0022】図5の流量特性図に示すように、従来、制
御不能であった全閉付近の流量特性を滑らかにすること
が可能で、しかも、用途に応じて曲線や曲線など任
意の特性をもたせることが可能である。
As shown in the flow rate characteristic diagram of FIG. 5, it is possible to smooth the flow rate characteristic in the vicinity of the fully closed state, which has been conventionally uncontrollable. It is possible to have it.

【0023】上記のように、主弁体1と円板5に設けら
れた両ストッパ8と9が当接係合するまで、弁棒2の回
転により、主弁体1と円板5に穿設された両流体通過穴
3と3a及び4と4aによる小流量の開閉作用を行なう
が、この間の弁棒2の回転角度は、図1〜3では、約2
0°であるが、穴数によっては350°(穴数1個のと
き)程度まで回転しうる。円板5のストッパ9が主弁体
1のストッパ8に当接した後、主弁体1は円板5を介し
て従来のバタフライ弁動作と同様に、90°回転するの
で、合計20°+90°=110°(穴数によっては3
50°+90°=440°)弁棒2が回転することにな
る。このように弁開閉に必要な動作は、穴数と穴の大き
さ及び穴の配置によって異なり、約110°〜440°
回転させることになる。
As described above, until the main valve body 1 and the stoppers 8 and 9 provided on the disk 5 come into contact with each other, the valve rod 2 is rotated to pierce the main valve body 1 and the disk 5. The two fluid passage holes 3 and 3a and 4 and 4a provided are used to open and close a small flow rate, and the rotation angle of the valve rod 2 during this period is about 2 in FIGS.
Although it is 0 °, it can be rotated up to about 350 ° (when the number of holes is 1) depending on the number of holes. After the stopper 9 of the disc 5 comes into contact with the stopper 8 of the main valve body 1, the main valve body 1 rotates 90 ° through the disc 5 like the conventional butterfly valve operation, so that a total of 20 ° + 90. ° = 110 ° (3 depending on the number of holes
(50 ° + 90 ° = 440 °) The valve rod 2 will rotate. As described above, the operation required for opening and closing the valve depends on the number of holes, the size of the holes, and the arrangement of the holes, and is about 110 ° to 440 °.
It will be rotated.

【0024】他方、全開状態から弁体を閉鎖させる場合
は、弁棒2を前記とは逆方向に回転させることにより、
主弁体1は閉方向に回動し、全閉状態の手前で円板5及
び主弁体1の双方に設けられた流体通過穴3と3a及び
4と4aが整合するように設計されているので、微少流
量の制御を経て全閉状態となり、洩れが零となる。
On the other hand, when the valve body is closed from the fully opened state, the valve rod 2 is rotated in the opposite direction to
The main valve body 1 rotates in the closing direction and is designed so that the fluid passage holes 3 and 3a and 4 and 4a provided in both the disc 5 and the main valve body 1 are aligned before the fully closed state. As a result, the flow rate is controlled to a very small amount, and the valve is fully closed, resulting in zero leakage.

【0025】この実施例によれば、弁棒2により円板5
が、管軸x−xと一致する主弁体1の回転中心軸6を中
心として回転することにより、主弁体1と円板5にそれ
ぞれ穿設された流体通過穴3と3a及び4と4aの開度
を調節し、流体制御を行なうが、このとき、これらの穴
の大きさ、位置関係、穴の数を自由に設計することによ
り、図5の曲線とに示すように、微少流量や回転角
と流量の関係を設計者の意図通りに実現することが可能
である。従って、従来のバタフライ弁で図5の曲線の
ように開きはじめに急激に流量が増加してしまうといっ
た特性を自由に変えたり、小流量のみの一定流量を安定
保持することが可能になる。
According to this embodiment, the disc 5 is moved by the valve rod 2.
By rotating around the rotation center axis 6 of the main valve body 1 which coincides with the pipe axis xx, the main valve body 1 and the disc 5 are provided with fluid passage holes 3 and 3a and 4, respectively. The opening of 4a is adjusted to perform fluid control. At this time, by freely designing the size of these holes, the positional relationship, and the number of holes, as shown by the curve in FIG. It is possible to realize the relationship between the rotation angle and the flow rate as intended by the designer. Therefore, it becomes possible to freely change the characteristic that the flow rate suddenly increases at the beginning of opening in the conventional butterfly valve as shown by the curve in FIG. 5, or to stably maintain a constant flow rate of only a small flow rate.

【0026】また、小流量通過用のこれらの穴は比較的
配管の中心近くに配置できるので、主弁体1の外周部の
エッジ部や管壁にエロージョン等の破損をもたらしにく
い。
Further, since these holes for passing a small flow rate can be arranged relatively near the center of the pipe, it is difficult to cause damage such as erosion to the edge portion of the outer peripheral portion of the main valve body 1 and the pipe wall.

【0027】上記のような特徴を有しながら従来のバタ
フライ弁と同じ動作を可能にしているので、全開時に
は、大きな流量を流すことができ、従来のバタフライ弁
の利点を失なわない。
Since the same operation as that of the conventional butterfly valve is possible while having the above-mentioned characteristics, a large flow rate can be flowed when fully opened, and the advantages of the conventional butterfly valve are not lost.

【0028】また、駆動手段としては、外部から弁棒2
を回転するのみであるので、駆動部の構造が従来の回転
弁のものと変わるところがなく、グローブ弁、仕切弁用
などの汎用駆動部を利用することができる。
As the driving means, the valve rod 2 is externally applied.
Since it only rotates, the structure of the drive unit is the same as that of the conventional rotary valve, and a general-purpose drive unit for globe valves, gate valves, etc. can be used.

【0029】なお、上記した実施例において、図1での
円板5と主弁体1との隙間から流体の洩れが生じるが、
これに対しては隙間の設計や、ゴム等のシール材を隙間
に配置することにより、この洩れを減らしたり、なくし
たりすることが可能である。
In the above-mentioned embodiment, fluid leaks from the gap between the disc 5 and the main valve body 1 in FIG.
On the other hand, it is possible to reduce or eliminate this leakage by designing the gap and disposing a seal material such as rubber in the gap.

【0030】[0030]

【発明の効果】以上説明したように、本発明によれば、
2枚の弁体を組合わせて構成したバタフライ弁の弁体に
おいて、弁棒に回動可能に支持された主弁体に1個以上
の流体通過穴を設けると共に、該流体通過穴と整合でき
るように穿設された1個以上の流体通過穴を有する円板
を、上記主弁体に回転可能に支持し、該円板を弁棒によ
って直接回転駆動すると共に、該円板を介して上記主弁
体を回動するようにし、上記主弁体と円板にそれぞれ穿
設された上記両流体通過穴を整合させることによって微
少流量制御を可能としたことにより、従来の回転弁の駆
動部をそのまま利用して従来のバタフライ弁の弁体と同
様に、大流量での流量制御を行なうのみならず、全閉付
近での微少流量制御をも行なうことが可能となる。
As described above, according to the present invention,
In a valve element of a butterfly valve configured by combining two valve elements, one or more fluid passage holes can be provided in a main valve element rotatably supported by a valve rod and can be aligned with the fluid passage hole. A disc having one or more fluid passage holes formed as described above is rotatably supported on the main valve body, and the disc is directly driven to rotate by a valve rod, and the disc is connected via the disc. By rotating the main valve body and aligning both the main valve body and the fluid passage holes formed in the disc, a minute flow rate control is enabled, so that a conventional rotary valve drive unit is provided. As is the case with the valve element of the conventional butterfly valve, it is possible not only to control the flow rate at a large flow rate, but also to control the minute flow rate near the fully closed position by using the above.

【0031】また、主弁体と円板にそれぞれ設けられる
流体通過穴の大きさ、数及び位置関係を変えることによ
り、微少流量での自由な流量特性をもたせることが可能
となる。
Further, by changing the size, the number and the positional relationship of the fluid passage holes respectively provided in the main valve body and the disc, it becomes possible to provide free flow characteristics at a minute flow rate.

【0032】また、上記円板を、主弁体の裏面に沿って
傘歯車を介し弁棒によって直接回転駆動するようにし、
また、上記主弁体と円板にそれぞれ設けられたストッパ
を互いに当接係合させることによって、主弁体を円板を
介し弁棒によって回動させるようにしたことにより、簡
単な構成により、大流量制御のみならず、微少流量制御
を容易に且つ確実に行なうことができる。
Further, the disc is directly driven to rotate by a valve rod along a back surface of the main valve body via a bevel gear,
Further, by bringing the main valve body and the stoppers respectively provided on the discs into abutting engagement with each other, the main valve body is rotated by the valve rod through the disc, so that a simple configuration Not only the large flow rate control but also the minute flow rate control can be performed easily and surely.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示すバタフライ弁の弁体の
断面図である。
FIG. 1 is a sectional view of a valve body of a butterfly valve showing an embodiment of the present invention.

【図2】図1の円板を矢印A方向からみた正面図であ
る。
FIG. 2 is a front view of the disc shown in FIG. 1 as viewed in the direction of arrow A.

【図3】図1の主弁体を矢印B方向からみた正面図であ
る。
3 is a front view of the main valve body of FIG. 1 seen from the direction of arrow B. FIG.

【図4】バタフライ弁の弁体の流量特性線図である。FIG. 4 is a flow rate characteristic diagram of a valve body of a butterfly valve.

【図5】図4のV部の拡大図である。FIG. 5 is an enlarged view of a V portion of FIG.

【符号の説明】[Explanation of symbols]

1 主弁体 2 弁棒 3,3a,4,4a 流体通過穴 5 円板 6 円板の回転中心軸 7,7a 傘歯車 8,9 ストッパ 1 main valve body 2 valve rod 3,3a, 4,4a fluid passage hole 5 disk 6 disk rotation center axis 7,7a bevel gear 8,9 stopper

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 2枚の弁体を組合わせて構成したバタフ
ライ弁の弁体において、弁棒に回動可能に支持された主
弁体に1個以上の流体通過穴を設けると共に、該流体通
過穴と整合できるように穿設された1個以上の流体通過
穴を有する円板を、上記主弁体に回転可能に支持し、該
円板を弁棒によって直接回転駆動すると共に、該円板を
介して上記主弁体を回動するようにし、上記主弁体と円
板にそれぞれ穿設された上記両流体通過穴を整合させる
ことによって微少流量制御及び流量特性の任意設計を可
能としたことを特徴とするバタフライ弁の弁体。
1. A valve body of a butterfly valve constructed by combining two valve bodies, wherein one or more fluid passage holes are provided in a main valve body rotatably supported by a valve rod, and A disc having at least one fluid passage hole formed so as to be aligned with the passage hole is rotatably supported on the main valve body, and the disc is directly driven to rotate by a valve rod, and By rotating the main valve body through a plate and aligning both the main valve body and the fluid passage holes formed in the disc, it is possible to control the minute flow rate and arbitrarily design the flow rate characteristics. The valve element of the butterfly valve, which is characterized in that
【請求項2】 主弁体に回転可能に支持された円板を、
主弁体の裏面に沿って、傘歯車を介し弁棒によって直接
回転駆動するようにしたことを特徴とする請求項1記載
のバタフライ弁の弁体。
2. A disc rotatably supported on the main valve body,
The valve body of the butterfly valve according to claim 1, wherein the valve body is directly driven to rotate by a valve rod via a bevel gear along a back surface of the main valve body.
【請求項3】 弁棒によって直接回転駆動される1個以
上の流体通過穴を有する円板と、1個以上の流体通過穴
を有する主弁体とを、それぞれに設けられたストッパを
互いに当接係合させることによって、主弁体を、円板を
介し弁棒によって回動させるようにしたことを特徴とす
る請求項1又は2記載のバタフライ弁の弁体。
3. A disk provided with one or more fluid passage holes, which is directly rotated by a valve rod, and a main valve body having one or more fluid passage holes, respectively, and stoppers provided on the disc are brought into contact with each other. The valve element of the butterfly valve according to claim 1 or 2, wherein the main valve element is rotated by a valve rod through a disc by being brought into contact with each other.
JP2063294A 1994-02-17 1994-02-17 Valve element for butterfly valve Pending JPH07229567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2063294A JPH07229567A (en) 1994-02-17 1994-02-17 Valve element for butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2063294A JPH07229567A (en) 1994-02-17 1994-02-17 Valve element for butterfly valve

Publications (1)

Publication Number Publication Date
JPH07229567A true JPH07229567A (en) 1995-08-29

Family

ID=12032615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2063294A Pending JPH07229567A (en) 1994-02-17 1994-02-17 Valve element for butterfly valve

Country Status (1)

Country Link
JP (1) JPH07229567A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100435976C (en) * 2006-07-03 2008-11-26 浙江工业大学 Blade pulsation generator
CN104235398A (en) * 2014-09-28 2014-12-24 温州赛尔电子科技有限公司 Throttling-governing butterfly valve
CN113915351A (en) * 2021-10-29 2022-01-11 闫皓男 Eccentric butterfly valve
CN114635989A (en) * 2022-04-01 2022-06-17 开维喜阀门集团有限公司 Butterfly valve with double-stage flow regulation function and method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100435976C (en) * 2006-07-03 2008-11-26 浙江工业大学 Blade pulsation generator
CN104235398A (en) * 2014-09-28 2014-12-24 温州赛尔电子科技有限公司 Throttling-governing butterfly valve
CN113915351A (en) * 2021-10-29 2022-01-11 闫皓男 Eccentric butterfly valve
CN113915351B (en) * 2021-10-29 2023-03-28 安徽省白湖阀门厂有限责任公司 Eccentric butterfly valve
CN114635989A (en) * 2022-04-01 2022-06-17 开维喜阀门集团有限公司 Butterfly valve with double-stage flow regulation function and method thereof
CN114635989B (en) * 2022-04-01 2023-07-21 开维喜阀门集团有限公司 Butterfly valve with two-stage flow regulating function and method thereof

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