JPS6283563A - Butterfly type shut-off valve, sealing property thereof is improved particularly for high-temperature fluid - Google Patents

Butterfly type shut-off valve, sealing property thereof is improved particularly for high-temperature fluid

Info

Publication number
JPS6283563A
JPS6283563A JP23025086A JP23025086A JPS6283563A JP S6283563 A JPS6283563 A JP S6283563A JP 23025086 A JP23025086 A JP 23025086A JP 23025086 A JP23025086 A JP 23025086A JP S6283563 A JPS6283563 A JP S6283563A
Authority
JP
Japan
Prior art keywords
valve
butterfly
valve seat
axis
conduit
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
Application number
JP23025086A
Other languages
Japanese (ja)
Other versions
JPH0310828B2 (en
Inventor
フランコ ナルドゥッツイ
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.)
BANETSUSA SpA
Original Assignee
BANETSUSA SpA
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 BANETSUSA SpA filed Critical BANETSUSA SpA
Publication of JPS6283563A publication Critical patent/JPS6283563A/en
Publication of JPH0310828B2 publication Critical patent/JPH0310828B2/ja
Granted legal-status Critical Current

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  • Lift Valve (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は高温流体用として特にシール性を高めた蝶形閉
止弁に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a butterfly-shaped stop valve with particularly improved sealing performance for high-temperature fluids.

[従来技術] 周知の螺形弁は弁体からなり、その弁体は内部に実質的
に管状の導管を形成し、その導管に実質的に直交する軸
を中心に回動する閉1ト部材を備える。その閉lI:部
材は基本的には円板すなわちその周囲にエラストマーリ
ングを備えた「7へタフライ」であり、そのエラストマ
ーリングは円板が回転すると導管に形成された弁座には
まる。「バタフライ」は実質的に円錐台形で、その軸心
は導管の軸心と一致する。
PRIOR ART Known spiral valves consist of a valve body defining a substantially tubular conduit therein and a closed member pivoting about an axis substantially perpendicular to the conduit. Equipped with. Its closure: The member is basically a disk or "seven-tough fly" with an elastomer ring around its periphery, which elastomer ring fits into a valve seat formed in the conduit as the disk rotates. The "butterfly" is substantially frustoconical with its axis aligned with the axis of the conduit.

通常、90度の部分回転で、円板は弁内を流れる流体に
対する抵抗が最小になる「全開」位置から、エラストマ
ーリングが弁座にかみ合う「全閉」位置に移動する。そ
のリングとシートの間の最大の締め代は円板が全開位置
から90度回転して両者がかみ合ったときに実際に達成
される。駆動トルクの増加は、リングと弁座のシール力
の増加よりはむしろ減少をもたらす、このように、従来
の弁のシール機部は円板に掛けるトルクではなく、円板
の位置に依存する。
Typically, a partial rotation of 90 degrees moves the disc from a "fully open" position, where there is minimal resistance to fluid flowing through the valve, to a "fully closed" position, where the elastomer ring engages the valve seat. Maximum interference between the ring and the seat is actually achieved when the discs are rotated 90 degrees from the fully open position and the two engage. An increase in drive torque results in a decrease rather than an increase in the sealing force between the ring and the valve seat; thus, the sealing mechanism of a conventional valve depends on the position of the disk rather than the torque applied to the disk.

従来のこのような弁は、弁を通る流体が高温高圧になる
と、欠点が問題になる。高温高圧下において弁座とエラ
ストマーリングが変形してシールが不具合になっても、
先に述べたとおり、円板に掛ける駆動トルクを増加して
リングと弁座の間のシールを向上させることができない
から、変形は一層太きくなる。
Conventional such valves suffer from drawbacks when the fluid passing through the valve reaches high temperatures and pressures. Even if the valve seat and elastomer ring deform under high temperature and high pressure and the seal becomes defective,
As mentioned above, the deformation becomes even greater because the driving torque applied to the disc cannot be increased to improve the seal between the ring and the valve seat.

さらに、リングがエラストマーであるため、高温高圧下
においては急速に劣化し、ひんばんな取り替えが必要に
なる。
Furthermore, since the ring is made of elastomer, it deteriorates rapidly under high temperature and pressure, requiring frequent replacement.

[発明が解決しようとする問題点] 本発明は上記問題を解決するためになされたものであり
、そのねらいとするところは、閉止部材に掛ける駆動ト
ルクに応じて弁座と閉止部材の間のシール性が変化し、
高温高圧下においても優れたシール性が得られる蝶形閉
止弁を提供することにある。
[Problems to be Solved by the Invention] The present invention has been made to solve the above problems, and its aim is to reduce the distance between the valve seat and the closing member according to the driving torque applied to the closing member. The sealing properties change,
It is an object of the present invention to provide a butterfly-shaped shutoff valve that provides excellent sealing performance even under high temperature and high pressure conditions.

このねらいに沿う本発明の目的の一つは高温−ドにおい
ても高い信頼性を有する金属製の弁座とリングを備えた
螺形弁を提供することにある。又、本発明の別の目的は
リングと弁座の間の摩擦抵抗を克服するために必要な力
ができるだけ均一であって弁の開閉に過大な駆動トルク
要しない螺形弁を提供することにある。
One of the objects of the present invention in accordance with this aim is to provide a spiral valve with a metal valve seat and ring that has high reliability even at high temperatures. Another object of the present invention is to provide a spiral valve in which the force required to overcome the frictional resistance between the ring and the valve seat is as uniform as possible, and in which excessive driving torque is not required to open and close the valve. be.

[問題を解決するための手段と作用] 本発明の高温流体用に特にシールを数片した蝶形閉市弁
は弁体を備え、その弁体は人口と出口を有し蝶形の閉止
部材を回動可能に収容する実質的に管状の導管を内部に
形成し、その閉止部材はその導管内に設けられた弁座に
嵌着可能である。本発明の前記目的を達成するだめの特
徴的手段としては、前記弁座は前記導管軸に対して傾斜
した軸心を有する円錐面を前記導管の軸心に直交する二
平面で切断することによって形成された実質的に円錐台
形の形状であり、前記閉th部材は前記導管と前記円錐
面の両軸心を含む平面に直交する回転軸を有し、前記回
転軸は前記円錐面の頂点の反対側の前記弁座の中央面か
ら一定の距離をおいた位置にありかつ前記円錐面の頂点
の側において前記弁座によって前記中央面に形成された
楕円の中心に対して偏心した位置にあり、さらに前記閉
止部材はその周縁部に弾性変形可能なシールリングを保
持し、前記シールリングは前記弁座と同形であるがそれ
と締りばめするようにより大きな寸法の半径を持ち、前
記弁座に接触しながらその面を横切ることができること
にある。
[Means and effects for solving the problem] The butterfly-shaped closure valve with several seals especially for high-temperature fluids of the present invention comprises a valve body, the valve body having a valve body and an outlet and having a butterfly-shaped closure member. a substantially tubular conduit rotatably received therein, the closure member being fitable in a valve seat provided within the conduit. As a characteristic means for achieving the above object of the present invention, the valve seat is formed by cutting a conical surface having an axis inclined with respect to the axis of the conduit by two planes perpendicular to the axis of the conduit. The closed th member has a substantially frustoconical shape, and the closed th member has an axis of rotation perpendicular to a plane including the axes of the conduit and the conical surface, and the axis of rotation is at the apex of the conical surface. The valve seat is located at a certain distance from the center plane of the valve seat on the opposite side, and is located at a position eccentric to the center of the ellipse formed on the center plane by the valve seat on the side of the apex of the conical surface. , furthermore said closure member carries at its periphery an elastically deformable sealing ring, said sealing ring being of the same shape as said valve seat but having a radius of a larger size for an interference fit therewith, and said sealing ring having a radius of a larger size for an interference fit therewith; The ability to cross the surface while making contact.

[実施例] 本発明を図面に示された実施例に基づいて詳細に説明す
るが、本発明は実施例に限定されるものではない。
[Example] The present invention will be described in detail based on the example shown in the drawings, but the present invention is not limited to the example.

第1図ないし第3図において符号1で示す弁は弁体2か
らなり、その弁体は内部に管状の導管3を形成し、その
導管3は弁を介して制御されるパイプに周知の方法で接
続される入口と出口を有する。弁体2は閉止部材4を収
容し、その閉止部材4はシャフト6に固定支持された円
板5からなり、そのシャフト6は弁体2に回転自在に支
持されかつそれから一端が突出して駆動トルクによる円
板5の駆動を可能にする。
The valve designated by the reference numeral 1 in FIGS. 1 to 3 consists of a valve body 2, which forms a tubular conduit 3 in its interior, which conduit 3 is connected to the pipe controlled by the valve in a known manner. It has an inlet and an outlet connected by. The valve body 2 accommodates a closing member 4, and the closing member 4 consists of a disc 5 fixedly supported on a shaft 6. The shaft 6 is rotatably supported by the valve body 2 and has one end protruding from the valve body 2 to receive a driving torque. drive of the disk 5 is possible.

導管3の内部に弁座7が設けられ、シャフト6が回転し
て弁を閉じると、閉止部材はその弁座7に嵌合する。
A valve seat 7 is provided inside the conduit 3 and the closing member fits into the valve seat 7 when the shaft 6 rotates to close the valve.

第2図、第3rA及び第6図に示すように、弁座7は導
管3の軸心すに直交する二つの相互に平行な面と導管3
の軸心すに対して傾斜する軸心aを持つ円錐面から限定
された円錐台の形状を有する。その円錐面は図において
輪郭線c、lとして示される。弁座7の形状を限定する
円錐面は、小径の弁を除き、20度ないし25度の範囲
の頂角■を持ち、その頂点から二つの相互に平行な面に
よって限定された楕円の図上の端の点を通る直線Cが実
質的に導管3の軸心すに平行になるような位置にある。
As shown in FIGS. 2, 3rA, and 6, the valve seat 7 has two mutually parallel surfaces perpendicular to the axis of the conduit 3 and
It has a truncated conical shape defined by a conical surface with an axis a inclined with respect to the axis a. Its conical surface is shown as contour lines c, l in the figure. The conical surface that limits the shape of the valve seat 7, except for small-diameter valves, has an apex angle in the range of 20 degrees to 25 degrees, and is located on the diagram of an ellipse defined by two mutually parallel surfaces from its apex. The position is such that a straight line C passing through the end point of is substantially parallel to the axis of the conduit 3.

閉lF部材4の周縁は弁座7と同形であるが、半径寸法
はそれよりも大きく、閉止部材4は弁内に位14する回
転軸fを中心に回転可能であり、その回転軸は導管と円
錐面の軸心を含む面に直交する。回転軸fは円錐面の頂
点8の反対側において弁座の中央面すなわち前記二つの
平行面から等距離の面から離れている。中央面から回転
軸fまでの距離は弁の構造が許す範囲で小さく設定され
る。
The circumference of the closing member 4 is the same as the valve seat 7, but its radial dimension is larger, and the closing member 4 is rotatable about an axis of rotation f located within the valve, the axis of rotation being the same as that of the valve seat 7. and perpendicular to the plane containing the axis of the conical surface. The axis of rotation f is away from the central plane of the valve seat, ie a plane equidistant from the two parallel planes, on the opposite side of the apex 8 of the conical surface. The distance from the center plane to the rotation axis f is set as small as the valve structure allows.

回転軸fは弁座の円錐面の頂点側において中央面ヒに限
定された楕円の中心9に関して偏心量eだけ偏心する。
The rotation axis f is eccentric by an eccentric amount e with respect to the center 9 of the ellipse defined by the central plane H on the vertex side of the conical surface of the valve seat.

その偏心量は、次に説明するように、導管3の直径の1
%ないし2%である。
The amount of eccentricity is 1 of the diameter of the conduit 3, as explained next.
% to 2%.

弁座7と同形の閉止部材4の周縁は円板5の周縁に設け
られた周溝12に部分的にはまるシールリング11の側
面に形成される。
The periphery of the closing member 4, which has the same shape as the valve seat 7, is formed on the side surface of a seal ring 11 that partially fits into a circumferential groove 12 provided on the periphery of the disk 5.

周1+W 12は、シールリング11が入れられた後に
、円板5に一体に固定されたフランジ13によって埋め
られる。
The circumference 1+W 12 is filled by a flange 13 which is fixed integrally to the disc 5 after the sealing ring 11 has been inserted.

シールリング11は金属又は金属と耐熱材から形成され
、第4図及び第5図に示すように、金属製の弁座7に接
すると内側に移動m能である。
The seal ring 11 is made of metal or a metal and a heat-resistant material, and is capable of moving inward when it comes into contact with the metal valve seat 7, as shown in FIGS. 4 and 5.

シールリング11は、又、屈曲と圧縮により弾性的にね
じれ変形することができるから、高温高圧下の作動によ
る変形の場合でも、弁座7に適合することができる。
Since the seal ring 11 can also be elastically torsionally deformed by bending and compression, it can be adapted to the valve seat 7 even in the case of deformation due to operation under high temperature and pressure.

シールリング11とそれを含む周溝12の間には金属製
0リング又はらせん巻きのガスケット14等の補助シー
ル部材が取付けられ、シールリング11と周溝12の間
からの流体のしみ出しを防1卜する。
An auxiliary seal member such as a metal O-ring or a spirally wound gasket 14 is installed between the seal ring 11 and the circumferential groove 12 including the seal ring 11 to prevent fluid from seeping out from between the seal ring 11 and the circumferential groove 12. Get one.

本発明の弁は弁座7に接するシールリング11の全表面
についてほぼ一定で常に正の入射角を有する。その入射
角Zは、第6図に示すように、回転軸fに大体直交し円
錐面の軸心aと導v3の軸心すを含む面において、回転
軸fの交点と円錐而Fの点を結ぶ直線りとその点におい
て円錐面に接する直線lと同じくその点において直線り
に直交する直線gによって形成される。もし入射角が負
であると、すなわち図示の時計回りではなくて反時計回
りであると、シールリングは弁座にはまることはできな
い、弁座とシールリングの脱着を考えると、入射角2は
常に正でなければならない。
The valve of the invention has a substantially constant and always positive angle of incidence over the entire surface of the seal ring 11 in contact with the valve seat 7. As shown in Fig. 6, the angle of incidence Z is determined by the intersection of the rotation axis f and the point of the cone F in a plane that is approximately perpendicular to the rotation axis f and includes the axis a of the conical surface and the axis of the conical surface V3. It is formed by a straight line connecting , a straight line l that is tangent to the conical surface at that point, and a straight line g that is perpendicular to the straight line at that point. If the angle of incidence is negative, i.e. counterclockwise instead of clockwise as shown, the seal ring cannot fit into the valve seat. Considering the attachment and detachment of the valve seat and seal ring, the angle of incidence 2 is Must always be positive.

発明の弁のこの特徴は弁座中央面に位置する各点の入射
角のパターンを示す第7図に現われている。そのグラフ
は横軸上に導管3の軸心と円錐面の軸心を含む面から弁
座中央面りの各点までの距離を、縦軸上に入射角2(度
)をとって描いたものである。
This feature of the inventive valve is illustrated in FIG. 7, which shows the pattern of incidence angles at points located in the center plane of the valve seat. The graph is drawn with the distance from the plane containing the axis of the conduit 3 and the axis of the conical surface to each point on the center surface of the valve seat on the horizontal axis, and the angle of incidence 2 (degrees) on the vertical axis. It is something.

入射角2は弁座の面に対してほぼ10度から15度の範
囲内で変化するが、この入射角2がほぼ一定であること
は弁の操作のどの段階においても特に高い駆動トルクを
必要としないことを示す。
The angle of incidence 2 varies within a range of approximately 10 to 15 degrees with respect to the plane of the valve seat, but the fact that this angle of incidence 2 is approximately constant requires a particularly high driving torque at every stage of valve operation. Indicates that it is not.

本発明の蝶形閉止弁の動作は上記説明から明らかである
といえる。
It can be said that the operation of the butterfly shutoff valve of the present invention is clear from the above description.

第1図ないし第5図に示すように、弁が開いた状態のと
きに、シャフト6に駆動トルクを作用させると、シール
リング11を保持している円板5が回転してJr座7に
着座する。シールリング11の寸法は弁座7の寸法より
も少し大きく、又、先に説明したように、入射角Zはほ
ぼ一定であるため、シールリング11は均一な圧縮を受
けて締め代によるシールを達成する。
As shown in FIGS. 1 to 5, when a driving torque is applied to the shaft 6 when the valve is in an open state, the disc 5 holding the seal ring 11 rotates and hits the Jr seat 7. Take a seat. The dimensions of the seal ring 11 are slightly larger than those of the valve seat 7, and as explained earlier, the incident angle Z is almost constant, so the seal ring 11 is uniformly compressed and seals due to interference. achieve.

駆動トルクをさらに増大するとシールリング11が弁座
7にさらに入り込み、締め代を大きくしてシール性を向
ヒさせる。
When the driving torque is further increased, the seal ring 11 further enters the valve seat 7, increasing the interference and improving the sealing performance.

反対方向にトルクを加えると、締め代は減少し、ついで
、シールリング11は弁座7から離れる。
Applying a torque in the opposite direction reduces the interference and then the sealing ring 11 moves away from the valve seat 7.

[発明の効果1 本発明の弁は弁座とシールリングの間のシール作用によ
って発明の目的を達成すると共に、閉止部材に掛ける駆
動トルクを増大させるにつれてシールリングと弁座の間
のシール作用が増大するという従来のものにはなかった
優れた効果を有する。
[Effect of the invention 1] The valve of the present invention achieves the object of the invention by the sealing action between the valve seat and the seal ring, and the sealing action between the seal ring and the valve seat increases as the driving torque applied to the closing member increases. It has an excellent effect of increasing the amount of water that was not found in conventional products.

本発明の他の効果はシールリングの弾性反発力によって
いずれの流れの方向のシールも達成されることである。
Another advantage of the present invention is that sealing in either direction of flow is achieved by the elastic repulsion of the sealing ring.

本発明の別の効果は、シールリングが弁座のどのような
形状の変化にも完全に適合することにより、作動温度が
急速に変動しても十分なシールが得られることである。
Another advantage of the invention is that the sealing ring perfectly adapts to any shape changes in the valve seat, thereby providing a satisfactory seal even with rapid fluctuations in operating temperature.

さらに別の大きな効果としては、弁座からシールリング
が容易に離れることが挙げられる。これは、入射角が比
較的大きく、シールリングの弾性が膨張差を吸収するこ
とによる。
Another major effect is that the seal ring can be easily separated from the valve seat. This is because the angle of incidence is relatively large and the elasticity of the seal ring absorbs the difference in expansion.

本発明は各部材を技術的に均等なものに置換することに
より多くの応用が可能である。
The present invention can be applied in many ways by replacing each member with a technically equivalent one.

本発明の実施に際しては、用途に合せて使用される材料
と寸法を選定して個々の仕様と技術水準に適応させるこ
とはいうまでもない。
When carrying out the present invention, it goes without saying that the materials and dimensions used should be selected depending on the application and adapted to the individual specifications and state of the art.

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

第1図及び第2図は閉止部材の回転軸に直交しかつ導管
の軸心を含む面に沿う弁の断面図であり、弁が開いた状
態及び閉した状態をそれぞれ小す。 第3図は前回の断面に直交しかつ閉1F部材の回転軸を
含む面に沿う断面図であり、弁が閉じた状態を示す。 第4図及び第5図は弁の拡大断面図であり、弁が全閉し
たき及び閉じつつあるときのシールリングとJf座をそ
れぞれ示す。 第6図は弁の幾何学的解析図である。 第7図は本発明の弁の入射角のパターンを示す図である
。 図において符号1は弁、2はゴ1′体、3は導管、4は
閉+h部材、5は円板、6はシャフト、7はjr座、8
は頂点、9は楕円中心、11はシールリング、12は周
溝、13はフランジ、14はカスケント、aは円211
Ii′i7軸心、bは導管軸心、c、l。 g、hは直線、eは偏心J1)−1■は頂角、Zは人身
1角をそれぞれ示す。 \史さ
1 and 2 are cross-sectional views of the valve along a plane perpendicular to the rotation axis of the closure member and including the axis of the conduit, showing the open and closed states of the valve, respectively. FIG. 3 is a cross-sectional view taken along a plane perpendicular to the previous cross-section and including the rotation axis of the closed 1F member, showing the valve in a closed state. FIGS. 4 and 5 are enlarged sectional views of the valve, showing the seal ring and Jf seat when the valve is fully closed and when it is closing, respectively. FIG. 6 is a geometric analysis diagram of the valve. FIG. 7 is a diagram showing the incidence angle pattern of the valve of the present invention. In the figure, numeral 1 is a valve, 2 is a rubber body, 3 is a conduit, 4 is a closed + h member, 5 is a disc, 6 is a shaft, 7 is a JR seat, 8
is the vertex, 9 is the center of the ellipse, 11 is the seal ring, 12 is the circumferential groove, 13 is the flange, 14 is the casket, and a is the circle 211
Ii′i7 axis, b is the conduit axis, c, l. g and h are straight lines, e is eccentricity, J1)-1 is an apex angle, and Z is a vertical angle. \History

Claims (1)

【特許請求の範囲】 1)弁体からなり、前記弁体は入口と出口を有し蝶形の
閉止部材を回動可能に収容する実質的に管状の導管を内
部に形成し、前記閉止部材は前記導管内に形成された弁
座に嵌着係合可能である蝶形閉止弁であって、前記弁座
は前記導管軸心に対して傾斜した軸心を有する円錐面を
前記導管軸心に直交する二平面で切断することによって
形成された実質的に円錐台の形状であり、前記閉止部材
は前記導管軸心と前記円錐面軸心を含む平面に直交する
回転軸を有し、前記回転軸は前記円錐面の頂点の反対側
において前記弁座の中央面から一定の距離をおいた位置
にありかつ前記円錐面の頂点の側において前記弁座によ
って前記中央面に形成された楕円の中心に対して偏心し
た位置にあり、さらに前記閉止部材はその周縁において
弾性変形可能なシールリングを保持し、前記シールリン
グは前記弁座と同形であるがそれと締りばめするように
より大きな寸法の半径を持ち、前記弁座に接触しながら
その面を横切ることができることを特徴としてなる高温
流体用にシール性を特に高めた蝶形閉止弁。 2)前記円錐面はその頂点と弁座により中央面上に限定
された楕円の端の点を接続し、前記導管に実質的に平行
な母線を有することを特徴としてなる特許請求の範囲第
1項記載の高温流体用にシール性を特に高めた蝶形閉止
弁。 3)前記円錐面は頂点において実質的に20度ないし2
5度の範囲の角度を有することを特徴としてなる特許請
求の範囲第1項記載の高温流体用にシール性を特に高め
た蝶形閉止弁。 4)前記回転軸の偏心量は実質的に前記導管の直径の0
.01倍ないし0.02倍の範囲であることを特徴とし
てなる特許請求の範囲第1項記載の高温流体用にシール
性を特に高めた蝶形閉止弁。 5)前記シールリングは閉止部材の周縁に設けられた周
溝の中に部分的に嵌着することを特徴としてなる特許請
求の範囲第1項記載の高温流体用にシール性を特に高め
た蝶形閉止弁。 6)補助のシール部材が前記シールリングと前記周溝の
間に設けられたことを特徴としてなる特許請求の範囲第
5項記載の高温流体用にシール性を特に高めた蝶形閉止
弁。 7)前記シールリングは金属材からなることを特徴とす
る特許請求の範囲第1項ないし第6項のいずれか一つに
記載の高温流体用にシール性を特に高めた蝶形閉止弁。 8)前記シールリングは金属材と耐熱材からなることを
特徴とする特許請求の範囲第1項ないし第7項のいずれ
か一つに記載の高温流体用にシール性を特に高めた蝶形
閉止弁。 9)前記導管の軸心に直交する一平面と前記弁座の表面
の交差によって限定される楕円上の各点における入射角
は実質的に一定であり、前記入射角は前記楕円上の一点
から前記回転軸に立てた垂線に直交しかつ前記点を通る
直線と、同じく前記点から前記シートの表面に対して引
いた接線によって形成される角度であることを特徴とす
る特許請求の範囲第1項ないし第8項のいずれか一つに
記載の高温流体用にシール性を特に高めた蝶形閉止弁。
Claims: 1) a valve body forming therein a substantially tubular conduit having an inlet and an outlet and rotatably accommodating a butterfly-shaped closure member; is a butterfly-shaped stop valve that can be fitted and engaged with a valve seat formed in the conduit, and the valve seat has a conical surface having an axis inclined with respect to the conduit axis. The closing member has a substantially truncated conical shape formed by cutting with two planes perpendicular to the cone, and the closing member has a rotation axis perpendicular to a plane including the conduit axis and the conical surface axis; The axis of rotation is located at a certain distance from the central plane of the valve seat on the opposite side of the apex of the conical surface, and is located at a certain distance from the central plane of the valve seat on the side of the apex of the conical surface. in an eccentric position with respect to the center, and further said closure member carries at its periphery an elastically deformable sealing ring, said sealing ring being of the same shape as said valve seat but of larger dimensions for interference fit therewith. A butterfly-shaped shutoff valve with particularly enhanced sealing performance for high-temperature fluids, characterized in that it has a radius and can traverse the surface of the valve seat while contacting it. 2) The conical surface connects its apex to the end point of an ellipse defined on the central plane by the valve seat, and has a generatrix substantially parallel to the conduit. A butterfly-shaped shutoff valve with particularly improved sealing performance for high-temperature fluids as described in Section 1. 3) The conical surface has an angle of substantially 20 degrees to 2 degrees at the apex.
2. A butterfly shut-off valve with particularly enhanced sealing properties for hot fluids according to claim 1, characterized in that it has an angle in the range of 5 degrees. 4) The eccentricity of the rotating shaft is substantially equal to 0 of the diameter of the conduit.
.. 2. A butterfly-shaped stop valve with particularly improved sealing performance for high-temperature fluids according to claim 1, characterized in that the sealing performance is in the range of 0.01 to 0.02 times. 5) A butterfly with particularly improved sealing performance for high-temperature fluids according to claim 1, wherein the seal ring is partially fitted into a circumferential groove provided on the periphery of the closing member. Type shutoff valve. 6) A butterfly-shaped stop valve with particularly improved sealing performance for high-temperature fluids as claimed in claim 5, characterized in that an auxiliary sealing member is provided between the seal ring and the circumferential groove. 7) A butterfly-shaped stop valve with particularly improved sealing performance for high-temperature fluids according to any one of claims 1 to 6, wherein the seal ring is made of a metal material. 8) A butterfly-shaped closure with particularly improved sealing performance for high-temperature fluids according to any one of claims 1 to 7, wherein the seal ring is made of a metal material and a heat-resistant material. valve. 9) The angle of incidence at each point on an ellipse defined by the intersection of a plane perpendicular to the axis of the conduit and the surface of the valve seat is substantially constant, and the angle of incidence is substantially constant from one point on the ellipse. Claim 1, characterized in that the angle is formed by a straight line perpendicular to the perpendicular to the rotating shaft and passing through the point, and a tangent drawn from the point to the surface of the sheet. A butterfly-shaped shut-off valve with particularly improved sealing performance for high-temperature fluids according to any one of items 1 to 8.
JP23025086A 1985-10-08 1986-09-30 Butterfly type shut-off valve, sealing property thereof is improved particularly for high-temperature fluid Granted JPS6283563A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22383A/85 1985-10-08
IT22383/85A IT1186000B (en) 1985-10-08 1985-10-08 PERFECTLY SEALED BUTTERFLY INTERCEPTION VALVE, ESPECIALLY FOR THE INTERCEPTION OF HIGH TEMPERATURE FLUIDS

Publications (2)

Publication Number Publication Date
JPS6283563A true JPS6283563A (en) 1987-04-17
JPH0310828B2 JPH0310828B2 (en) 1991-02-14

Family

ID=11195537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23025086A Granted JPS6283563A (en) 1985-10-08 1986-09-30 Butterfly type shut-off valve, sealing property thereof is improved particularly for high-temperature fluid

Country Status (2)

Country Link
JP (1) JPS6283563A (en)
IT (1) IT1186000B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI476339B (en) * 2012-07-27 2015-03-11 Jdv Control Valves Co Ltd Tri-shift valve with a symmetric drain proof ring

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759258U (en) * 1980-09-26 1982-04-07

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51547A (en) * 1974-06-24 1976-01-06 Idemitsu Kosan Co KARENDAAKAKOSEINOKAIZENSARETA HORIECHIRENJUSHISOSEIBUTSU

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759258U (en) * 1980-09-26 1982-04-07

Also Published As

Publication number Publication date
JPH0310828B2 (en) 1991-02-14
IT8522383A0 (en) 1985-10-08
IT1186000B (en) 1987-11-18

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