WO2011128974A1 - バタフライバルブの弁体 - Google Patents
バタフライバルブの弁体 Download PDFInfo
- Publication number
- WO2011128974A1 WO2011128974A1 PCT/JP2010/056594 JP2010056594W WO2011128974A1 WO 2011128974 A1 WO2011128974 A1 WO 2011128974A1 JP 2010056594 W JP2010056594 W JP 2010056594W WO 2011128974 A1 WO2011128974 A1 WO 2011128974A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve body
- valve
- cylindrical portion
- substrate
- center
- Prior art date
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Classifications
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- 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
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- 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
Definitions
- the present invention relates to a valve element of a butterfly valve used for opening / closing and adjusting a pipe line through which fluid such as water, gas and oil flows in a piping system.
- a disk-shaped valve body is rotatably supported in a cylindrical valve box, and a pipe ring is formed by bringing a seat ring made of an elastic member mounted on the inner peripheral surface of the valve box into contact with the valve body outer peripheral surface.
- a butterfly valve designed to open and close the valve is widely used for flow control of various fluids because of its simple structure.
- a butterfly valve drives a valve rod by driving and rotating a valve rod by an actuator such as an electric motor, a pressure cylinder, etc. to move the outer peripheral portion of the valve body to a seat ring mounted on the inner periphery of the valve box. It has the function of adjusting the flow rate of the fluid by opening and closing the duct and changing the flow passage area according to the size of the gap between the outer periphery of the valve body and the seat ring.
- Valve closing is achieved by pressure bonding of the outer periphery of the valve body and the seat ring which is an elastic body, but in the process of opening and closing the valve body, the interaction force by the contact between the outer periphery of the valve body and the seat ring is It contributes to. Therefore, by reducing this interaction force, the operating torque of the valve is reduced and the valve operation is facilitated. Also, the valve body receives the pressure of the fluid flowing through the conduit, and in the fully closed position of the flow path, the entire fluid pressure in the conduit is loaded on the surface of the valve body and the pressure of the fluid applied to the valve body Is the largest.
- valve seat seal position of the valve body and the seat ring due to the deformation of the valve body needs a minimum overlapping portion (seal band) to completely close the conduit.
- sealability of the valve seat high rigidity of the valve body is required.
- the rigidity of the valve body can be increased by increasing the thickness of the valve body, but the mass of the valve body is also increased, so the cost is increased and the weight is increased. It is inconvenient. Therefore, in order to solve this problem, a method of installing a rib on the surface of the valve body along the fluid flow direction (Patent Document 1), a method of making the inside of the valve body hollow and securing structural rigidity (patented) Reference 2) is proposed. However, in the method of installing the rib on the valve body, although the rigidity is high against the stress in the arrangement direction of the rib, the rigidity of the valve body is low for the direction having a predetermined angle with respect to the rib.
- valve body when a rib is disposed on the valve body in the same direction as the fluid flow direction, the valve body receives pressure from a direction different from the flow direction (for example, a direction at 45 degrees to the rib). Deflection may occur in the seal position between the outer periphery of the valve body and the seat ring, which may reduce the sealability of the valve seat.
- the butterfly valve when the butterfly valve is small, the size of the valve body is limited, so there may be a case where the valve body can not be structurally mechanically shaped to provide a cavity inside the valve body.
- the frictional force generated by the pressure sliding of the outer peripheral portion of the valve body on the seat ring affects the rotational torque of the valve shaft that rotates the valve body.
- the rigidity of the valve body is low and the valve body is easily deformed, it is necessary to increase the contact area between the outer peripheral portion of the valve body and the seat ring in order to maintain air tightness. , Rotational torque increases. Therefore, in order to improve the operability of the butterfly valve and reduce the energy of the motor for rotating the valve shaft, the rigidity of the valve body is improved and the shape of the outer periphery of the valve body is improved, and the friction with the seat ring It is important to reduce the rotational torque of the valve stem by reducing the force.
- the shape of the angled seat provided on the inner peripheral surface of the seat ring in contact with the outer peripheral surface of the valve body has a curved shape of cosine function with the boss as a base point toward the center between the bosses where the valve rod penetrates.
- Patent Document 3 JP 2004-239343 A JP-A-9-60751 Japanese Patent Application Laid-Open No. 55-142169
- An object of the present invention is to provide a valve body of a butterfly valve which enhances the rigidity of the valve body, reduces the operation torque of the valve, and facilitates the valve operation.
- a cylindrical portion extending in a diametrical direction at the center of a disc-like substrate constituting the valve body is formed to protrude on the front and back surfaces of the substrate.
- An insertion hole is formed, and a plurality of circular ribs which are in contact with the cylindrical portion are concentrically raised on the front and back surfaces of the substrate.
- a second invention is characterized in that the outermost rib is installed along the edge of the substrate.
- the third invention is characterized in that the central outside diameter of the cylindrical portion is larger than the outside diameter of the end portion.
- the thickness of the central portion of the substrate is the largest and the thickness of the outer peripheral portion is the smallest, and the inclination angle of the substrate surface divided by the concentric circular ribs is the substrate surface adjacent to the central side The inclination angle of
- the outer peripheral portion of the valve body is constituted by a part of a spherical surface, and the outer peripheral circular rib and the valve peripheral portion constituted by the spherical surface have an angle of 30 to 50 degrees with the tangent of the outermost peripheral end of the outer peripheral portion. It is characterized by being connected by a straight line.
- the cylindrical portion extending in the diameter direction is raised from the front and back surfaces of the substrate at the center of the substrate constituting the valve body, the cylindrical portion serves as a bone bearing the strength of the valve body.
- a plurality of circular ribs extending concentrically are formed on the front and back surfaces of the substrate while being in contact with the cylindrical portion, substantially uniform at any cross section with respect to the center line of the valve body. A cross section coefficient can be obtained, the rigidity of the valve body can be substantially uniform throughout the valve body, and a highly rigid valve body can be obtained.
- the cylindrical portion is a supporting point of the circular rib with respect to the pressure received, the cylindrical portion remains in a very slight deformation.
- the rigidity of the outer peripheral portion of the valve body near the valve rod hole can be improved by the intersection of the cylindrical portion and the circular rib of the outer peripheral portion of the valve body, the seal stability of the seat ring around the valve rod can be improved.
- the thickness of the central portion of the substrate is the largest and the thickness of the peripheral portion is the smallest, and the inclination angle of the substrate surface divided by the concentric circular ribs is smaller than the inclination angle of the substrate surface adjacent to the center
- the slope of the flat portion of the valve body is conical between the ribs from the center of the valve body toward the outer periphery, and the slope is the largest at the center and gradually decreases toward the outer periphery. It is possible to reduce the weight while equalizing the strength.
- the valve body is opened and closed by connecting the outermost circumferential rib and the outer peripheral portion of the valve body in a straight line having an angle of 30 to 50 degrees with the tangent of the outermost circumferential end of the outer peripheral portion
- the resistance of the valve body due to the swelling of the elastic body surface is eliminated, and the torque resistance due to the interaction between the valve body and the seat ring is reduced.
- Can do In addition, fatigue of the elastic body due to a slippage with respect to the elastic body by the edge portion of the valve body can be minimized, and the opening / closing durability of the valve can be improved.
- the contact area between the valve body and the seat ring can be increased, the sealability can be maintained even if the seat ring is deformed due to contact with the valve body over time.
- FIG. 1 Front view of butterfly valve (A) and YY cross section (B) Valve body perspective view of the first embodiment Center section view of the cylindrical part along the center line Front view of the valve body of the first embodiment Center section view of the valve body at 90 degrees to the center line of the first embodiment Center section view of the valve body at 45 degrees to the center line of the first embodiment Center section view of the valve body at 30 degrees with respect to the center line of the first embodiment Principle for reducing valve body rotation torque Enlarged cross-sectional view of the outer periphery of the valve body Valve body perspective view of the second embodiment
- (1) is a butterfly valve main body, has a hollow cylindrical flow path, and is a discoid valve body (2) pivotally supported pivotally by valve rods (3) and (4).
- the hollow cylindrical channel is opened and closed.
- a seat ring (5) made of an elastic body is mounted on the inner peripheral surface of the hollow cylindrical portion of the valve body (1), and the outer peripheral surface of the valve body (2) is brought into contact with and separated from the seat ring (5) Open and close the valve.
- the valve body (2) is formed of a disk-like substrate (6), and has a cylindrical portion (7) for inserting a valve stem at the center of the substrate (6).
- the cylindrical portion (7) has a shape protruding from the front and back surfaces of the substrate (6).
- Such a shape of the cylindrical portion (7) increases the section coefficient in the direction of the valve body center line (8) and improves the rigidity of the valve body against pressure from the direction perpendicular to the valve body center line (8) I can do it.
- the cylindrical portion (7) is hollow from one end to the other end or hollow at both ends. In any case, the center of the cylindrical portion is easy to cast and form. In addition, sufficient rigidity can be obtained with a minimum amount of material, and weight reduction of the valve body is possible.
- FIG. 2 is a shape which has a cylindrical part (7) which inserts a valve stem in the center of a board
- FIG. 3 shows a central cross-sectional view along the valve body center line (8) of the cylindrical portion (7).
- the cross-sectional shape of the cylindrical portion (7) makes the outer diameter (9) of the core portion larger than the outer diameter (10) of the valve rod insertion hole.
- the inner diameter (11) of the core portion is larger than the inner diameter (12) of the valve rod insertion hole.
- the cross section of the cylindrical portion (7) is large and the valve body cross section coefficient is large. It is possible to minimize the deformation of the valve body against a force in the direction of 90 degrees (upward or downward in FIG. 3) with respect to the line.
- the cross-sectional strength with respect to pressure is equalized, it is not necessary to add an extra thickness, and the weight of the valve can be reduced.
- the outer diameter of the core may be smaller than the outer diameter of the valve rod insertion hole.
- the outer diameter of the core portion is reduced according to the size of the valve body, the thickness of the valve rod needs to be maintained at a certain level or more from the viewpoint of strength.
- the inner diameter of the core portion is also smaller than the inner diameter of the valve rod insertion hole, or the hollow portion of the core portion disappears.
- a plurality of ribs (13) are concentrically disposed on the front and back surfaces of the substrate (6) (FIGS. 2 and 4), and the ends of the ribs (13) are uniformly joined by bonding with the side surface of the cylindrical portion (7) It becomes a rigid valve body.
- 5, 6 and 7 show central sectional views at 30 degrees, 45 degrees and 90 degrees with respect to the valve body center line of the valve body of FIG.
- FIG. 5 is a central cross-sectional view of the valve body at 90 degrees with respect to the valve body center line (8).
- the cross-sectional shape of the substrate (6) is thicker toward the cylindrical portion (center) and thinner toward the edge (peripheral).
- the substrate surface divided by the rib (13) is referred to as surface 1, surface 2, ..., surface (n-1), surface n in this order from the side closer to the cylindrical portion, with respect to the substrate center of each surface
- the inclination angles are ⁇ 1, ⁇ 2,..., ⁇ (n-1), ⁇ n
- the inclination angles of the substrate are such that ⁇ 1 ⁇ ⁇ 2 ⁇ .. ⁇ ⁇ n-1 ⁇ ⁇ n.
- FIG. 8 is a principle view for explaining the reduction of the rotational torque of the valve body due to the edge shape of the outer periphery of the valve body.
- the valve is closed in the direction of the arrow or opened in the opposite direction.
- the surface of the elastic body constituting the seat ring pushed by the edge portion (15) of the valve bulges, resulting in resistance to the valve closing operation.
- the valve body edge portion (15) according to the present invention is a straight line having an angle of 30 to 50 degrees with a tangent of the spherically machined portion of the outer peripheral portion (16) of the valve body and the rib at the outermost circumferential end of the outer peripheral portion (16).
- the swelling of the elastic body behind the valve body edge was suppressed and the resistance due to the swelling of the elastic body was minimized. This eliminates the resistance to the valve body and reduces the torque resistance due to the interaction between the valve body and the seat ring. In addition, the fatigue of the elastic body due to the slippage of the elastic body by the edge of the valve body was minimized, and the valve opening and closing durability was improved.
- FIG. 9 shows an enlarged cross section of the outer periphery of the valve body.
- the shape in which the angle ⁇ between the spherically machined portion of the outer peripheral portion (16) of the valve body and the rib is tangent to the outermost circumferential end of the outer peripheral portion (16) is 30 to 50 degrees is shown.
- the angle ⁇ affects the swelling of the elastic body by the edge portion (15) of the valve body, and by making this 30 to 50 degrees, the airtightness of the valve body is maintained and the swelling of the elastic body is caused.
- the resistance is minimized. That is, if the angle is smaller than 30 degrees, the resistance increases, and if the angle is larger than 50 degrees, the seal stability may not be maintained.
- the angle ⁇ is most preferably 45 degrees.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Sliding Valves (AREA)
Abstract
Description
2 弁体
3 上弁棒
4 下弁棒
5 シートリング
6 基板
7 円筒部
8 弁体中心線
9 芯部の外径
10 弁棒挿入孔の外径
11 芯部の内径
12 弁棒挿入孔の内径
13 リブ
14 シートリングの盛り上がり部
15 エッジ部
16 外周部
Claims (5)
- 弁体を構成する円板状の基板の中心に直径方向に延びる円筒部を基板の表裏面に隆起させて形成し、該円筒部に弁棒挿入孔を穿設すると共に、該円筒部と交接する複数の円形リブを基板の表裏面に同心円状に隆起させて形成したことを特徴とするバタフライ弁の弁体。
- 最外周のリブを基板の縁に沿って設置したことを特徴とする請求項1記載の弁体。
- 円筒部の中央の外径を端部の外径より大きくしたことを特徴とする請求項1又は2記載の弁体。
- 基板の中心部の厚さを最も大きくし、外周部の厚さを最も小さくすると共に、同心円状の円形リブによって区切られる基板表面の傾斜角度を、中心側に隣接する基板表面の傾斜角度以下としたことを特徴とする請求項1乃至3のいずれかに記載の弁体。
- 弁体の外周部を球面の一部で構成し、最外周の円形リブと球面で構成される弁体外周部とを外周部の最外円周端の接線と30乃至50度の角度を有する直線で連結したことを特徴とする請求項1乃至4のいずれかに記載の弁体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080066172.9A CN102844598B (zh) | 2010-04-13 | 2010-04-13 | 蝶形阀的阀芯 |
KR1020127028467A KR101476518B1 (ko) | 2010-04-13 | 2010-04-13 | 버터플라이 밸브의 밸브체 |
PCT/JP2010/056594 WO2011128974A1 (ja) | 2010-04-13 | 2010-04-13 | バタフライバルブの弁体 |
JP2010529586A JP4659927B1 (ja) | 2010-04-13 | 2010-04-13 | バタフライバルブの弁体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/056594 WO2011128974A1 (ja) | 2010-04-13 | 2010-04-13 | バタフライバルブの弁体 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011128974A1 true WO2011128974A1 (ja) | 2011-10-20 |
Family
ID=43952804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/056594 WO2011128974A1 (ja) | 2010-04-13 | 2010-04-13 | バタフライバルブの弁体 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4659927B1 (ja) |
KR (1) | KR101476518B1 (ja) |
CN (1) | CN102844598B (ja) |
WO (1) | WO2011128974A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013010123A1 (de) * | 2013-06-18 | 2014-12-18 | Erhard Gmbh & Co. Kg | Armatur zum Absperren oder Regeln eines Mediums |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6753694B2 (ja) * | 2016-05-17 | 2020-09-09 | 株式会社ミクニ | バルブ装置 |
WO2020175673A1 (ja) | 2019-02-28 | 2020-09-03 | 株式会社キッツ | 二重偏心形バラフライバルブの弁体と二重偏心形バタフライバルブ |
JP6959953B2 (ja) * | 2019-03-26 | 2021-11-05 | Ckd株式会社 | バタフライバルブ |
EP3722642B1 (de) * | 2019-04-10 | 2022-02-23 | Georg Fischer Rohrleitungssysteme AG | Absperrklappe |
CN112360997B (zh) * | 2020-10-27 | 2022-08-09 | 祥安消防科技有限公司 | 一种高气密性的消防蝶阀 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0362269U (ja) * | 1989-10-23 | 1991-06-18 | ||
JPH0564576U (ja) * | 1992-02-07 | 1993-08-27 | 株式会社巴技術研究所 | バタフライ弁の弁体 |
JP2007032683A (ja) * | 2005-07-26 | 2007-02-08 | Toyo Valve Co Ltd | バタフライバルブ |
JP2008175064A (ja) * | 2007-01-16 | 2008-07-31 | Hitachi Ltd | バタフライ式弁装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0362269A (ja) * | 1989-07-31 | 1991-03-18 | Nec Corp | 線画像近似方法および装置 |
JPH0564576A (ja) * | 1991-09-06 | 1993-03-19 | Tabai Espec Corp | カラム型培養装置 |
JP2852009B2 (ja) * | 1995-08-22 | 1999-01-27 | 株式会社栗本鐵工所 | 高温高圧流体用弁のハウジング構造 |
JP3676785B2 (ja) * | 2003-02-05 | 2005-07-27 | 株式会社巴技術研究所 | バタフライ弁の弁体 |
-
2010
- 2010-04-13 JP JP2010529586A patent/JP4659927B1/ja not_active Expired - Fee Related
- 2010-04-13 CN CN201080066172.9A patent/CN102844598B/zh not_active Expired - Fee Related
- 2010-04-13 KR KR1020127028467A patent/KR101476518B1/ko active IP Right Grant
- 2010-04-13 WO PCT/JP2010/056594 patent/WO2011128974A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0362269U (ja) * | 1989-10-23 | 1991-06-18 | ||
JPH0564576U (ja) * | 1992-02-07 | 1993-08-27 | 株式会社巴技術研究所 | バタフライ弁の弁体 |
JP2007032683A (ja) * | 2005-07-26 | 2007-02-08 | Toyo Valve Co Ltd | バタフライバルブ |
JP2008175064A (ja) * | 2007-01-16 | 2008-07-31 | Hitachi Ltd | バタフライ式弁装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013010123A1 (de) * | 2013-06-18 | 2014-12-18 | Erhard Gmbh & Co. Kg | Armatur zum Absperren oder Regeln eines Mediums |
Also Published As
Publication number | Publication date |
---|---|
KR101476518B1 (ko) | 2014-12-24 |
JP4659927B1 (ja) | 2011-03-30 |
CN102844598B (zh) | 2014-03-12 |
CN102844598A (zh) | 2012-12-26 |
KR20130040852A (ko) | 2013-04-24 |
JPWO2011128974A1 (ja) | 2013-07-11 |
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