JPS61105373A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPS61105373A JPS61105373A JP22735484A JP22735484A JPS61105373A JP S61105373 A JPS61105373 A JP S61105373A JP 22735484 A JP22735484 A JP 22735484A JP 22735484 A JP22735484 A JP 22735484A JP S61105373 A JPS61105373 A JP S61105373A
- Authority
- JP
- Japan
- Prior art keywords
- spindle
- mounting member
- seal ring
- seal
- 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】
〔発明の技術分野〕
本発明は、比較的低圧力の流水中で大流量を制御するた
めに用いられるバタフライ弁に係り、特に、海水等の腐
蝕性の高い流水中でも使用できるバタフライ弁に関する
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a butterfly valve used to control a large flow rate in relatively low-pressure flowing water, and particularly to a butterfly valve used in highly corrosive flowing water such as seawater. Concerning butterfly valves that can be used.
（発明の技術的背景とその問題点）
一般にバタフライ弁は、その弁体がスピンドルを中心に
左右対称形をなしており、構造上比較的低圧力の流体の
制御に用いられるのが通例である。(Technical background of the invention and its problems) In general, butterfly valves have a valve body that is symmetrical around the spindle, and due to their structure, they are usually used to control relatively low-pressure fluids. .
ところで、水力、火力、原子力発電所等の電力事業用に
用いられるバタフライ弁は、低圧力ではあるが大流量の
流水を制御することが要求され、したがって一般のバタ
フライ弁と比較する口径自体が非常に大きくなってそれ
に伴う受圧面積の増大から作動トルクも大きくなり、ス
ピンドルあるいは主板等の弁体の強度も大きなものが要
求される。By the way, butterfly valves used for electric power projects such as hydropower, thermal power, and nuclear power plants are required to control a large flow of flowing water at low pressure, so the diameter itself is quite large compared to a general butterfly valve. Due to the increase in the pressure receiving area, the operating torque also increases, and the strength of the valve body such as the spindle or main plate is also required to be large.
従来、この種の大口径の弁体を製作する方策としては、
鋳造によって製作する方法と溶接構造で製作する方法と
が提案されている。そして溶接構造で弁体を構成する場
合には、前述する強度上の問題から主板を曲面板構造と
し、主板内部に補強リブを設ける方法が採られている。Conventionally, the methods for producing this type of large-diameter valve body were as follows:
A method of manufacturing by casting and a method of manufacturing by welding structure have been proposed. When constructing a valve body with a welded structure, a method is adopted in which the main plate is made into a curved plate structure and reinforcing ribs are provided inside the main plate due to the above-mentioned strength problem.
第１２図およびｌ１１３図は溶接構造による従来の大口
径のバタフライ弁の弁体を示すもので、この弁体１は、
曲面板状の主板２と、シールリング３と、上部スピンド
ルボス４と、下部スピンドルボス５と、補強リブ６．７
とを有し、これらを溶接により一体化して構成されてい
る。FIG. 12 and FIG. 113 show a conventional large-diameter butterfly valve valve body with a welded structure, and this valve body 1 has the following features:
A curved main plate 2, a seal ring 3, an upper spindle boss 4, a lower spindle boss 5, and reinforcing ribs 6.7.
and is constructed by integrating these by welding.
以上の構成を有する従来の溶接構造バクフライ弁におい
ては、開閉トルクおよび受圧力の関係上、両スピンドル
ボス４，５に装着される上下部の各スピンドル（図示せ
ず）の直径をあまり小さくすることができず、両スピン
ドルボス４．５も大径となって主板２の外面から露出す
ることになる。In the conventional welded backfly valve having the above configuration, the diameters of the upper and lower spindles (not shown) attached to both spindle bosses 4 and 5 cannot be made too small due to opening/closing torque and receiving pressure. Therefore, both spindle bosses 4.5 also have a large diameter and are exposed from the outer surface of the main plate 2.
このため、主板２の各スピンドルボス４，５に対応する
部位に切欠きを設けなければならない。For this reason, it is necessary to provide a notch in the main plate 2 at a portion corresponding to each spindle boss 4, 5.
従来この方法としては、ガスカッティング等により主板
２に切欠きを設け、その俊切欠き部をグラインダ等で成
形したり、あるいは主板２を一度全周に溶接した後□、
ボール盤等でスピンドルボス４．５の形状に合わせて切
欠きを設ける方法が採られているが、いずれも製作に多
くの時間と費用とを要するという欠点がある。Conventionally, this method involves creating a notch in the main plate 2 by gas cutting, etc., and shaping the notch using a grinder, or after welding the main plate 2 all around once, □.
A method has been adopted in which a notch is formed in accordance with the shape of the spindle boss 4.5 using a drilling machine, etc., but each method has the disadvantage that it requires a lot of time and cost to manufacture.
またバタフライ弁は、弁閉時の水圧は上下のスピンドル
部分で受けることになり、したがって弁体１には、両ス
ピンドル部分を支点とした流水方向の曲げモーメントが
加わることになる。このため、弁体１としてはスピンド
ル軸方向の強度が問題となり、従来の溶接構造バタフラ
イ弁では、その構造上一方の主板２と補強リブ６とは両
側隅肉溶接ができるが、他方の主板２と補強リブ６とは
当該主板２の外面側から栓溶接せざるを得な・い。Further, in the butterfly valve, the water pressure when the valve is closed is received by the upper and lower spindle portions, and therefore, a bending moment is applied to the valve body 1 in the direction of water flow using both spindle portions as fulcrums. For this reason, the strength of the valve body 1 in the spindle axial direction becomes an issue, and in conventional welded structure butterfly valves, one main plate 2 and the reinforcing rib 6 can be fillet welded on both sides due to its structure, but the other main plate 2 The reinforcing ribs 6 and 6 must be plug welded from the outer surface of the main plate 2.
このため、この栓溶接部分の強度が弱くなり、またスピ
ンドルボス４．５部分では主板２が偏平となるためこの
部分の強度も弱くなるという欠点がある。Therefore, the strength of this plug welded portion is weakened, and since the main plate 2 is flat at the spindle boss 4.5 portion, the strength of this portion is also weakened.
そこで従来は、両補強リブ６．７の中間位置にこれらに
対して４５度の角度で補強リブを追加することが行なわ
れるが、部品点数および工数が増大するとともに、重量
も増大するため好ましくない。Conventionally, a reinforcing rib is added at an angle of 45 degrees between the two reinforcing ribs 6 and 7, but this is not preferable because it increases the number of parts and man-hours as well as the weight. .
また従来の溶接構造バタフライ弁は、前述のように両ス
ピンドルボス４，５が主板２の外面から突出するため、
第１４図に示すように、弁閉時において両スピンドルボ
ス４，５の下流側に後流渦が発生し、流水の撹拌損失が
生じて流水特性が悪化するとともに、この後流渦ににり
騒音も発生するという問題がある。Furthermore, in the conventional welded structure butterfly valve, since both spindle bosses 4 and 5 protrude from the outer surface of the main plate 2 as described above,
As shown in Fig. 14, when the valve is closed, a trailing vortex is generated on the downstream side of both spindle bosses 4 and 5, causing loss of agitation of the flowing water and deteriorating the flowing water characteristics. There is also the problem that noise is generated.
特に、火力、原子力発電所等において、海水を作動流体
とする配管系統に用いるバタフライ弁にあっては、前記
復流渦発生部分が海水のよどみ部となって流れが少なく
なるため、第１５図に示すように、フジッボ等の海棲生
物８が付着しやすくなり、一旦これが付着すると、それ
を核として多層に海棲生物８が付着してこれがシールリ
ング３部分にまで拡がり、弁閉時に弁体１と弁胴（図示
せず）との封水機能を破壊するおそれがあるため問題で
ある。In particular, in butterfly valves used in piping systems that use seawater as the working fluid in thermal power plants, nuclear power plants, etc., the part where the return vortex is generated becomes a stagnation part of seawater and the flow is reduced. As shown in the figure, it becomes easy for marine organisms 8 such as Fujibob to adhere, and once this adheres, marine organisms 8 adhere in multiple layers using it as a core, and this spreads to the seal ring 3, causing the valve to close when the valve is closed. This is a problem because it may destroy the water sealing function between the body 1 and the valve body (not shown).
一方、弁体を鋳造により製作する従来のバタフライ弁に
おいては、木型や鋳型を必要とし、しかも鋳巣等の鋳造
欠陥が生じやすいため肉厚を増加させなければならず、
ために重量が増加するとともにコスト高となるという欠
点がある。On the other hand, conventional butterfly valves in which the valve body is manufactured by casting require a wooden mold or mold, and are prone to casting defects such as cavities, so the wall thickness must be increased.
Therefore, there is a disadvantage that the weight increases and the cost increases.
また従来のｖＩ造バタフライ弁は、前記溶接構造バタフ
ライ弁と同様スピンドルボスが主板の外面から突出して
いるため、後流渦の発生およびＷＱ棲生物の付着に伴う
封水機能の破壊等同様の問題がある。In addition, in the conventional vI butterfly valve, the spindle boss protrudes from the outer surface of the main plate, similar to the welded butterfly valve, so there are similar problems such as generation of wake vortices and destruction of water sealing function due to adhesion of WQ organisms. There is.
本発明は、このような点に鑑みてなされたしので、構造
が簡単で軽量かつ安価に￥ＡＪ作することができるとと
もに、充分な強度を確保することができ、また流水特性
を向上させて海水中で使用した場合にも尚棲生物が付着
し難い構造とすることができるバタフライ弁を提供する
ことを目的とする。The present invention has been made in view of these points, and it is possible to make AJ with a simple structure, light weight, and low cost, and also to ensure sufficient strength and improve water flow characteristics. To provide a butterfly valve having a structure that prevents the attachment of living organisms even when used in seawater.
（発明の概要〕
本発明は前記目的を達成する手段としで、スピンドルが
装着されて弁の回動中心をなすスピンドル装着部材と、
周方向両端がスピンドル装着部材の長手方向両端にそれ
ぞれ溶接され全体として円形をなす半円形状の一対のシ
ールリングと、各シールリングの外面の幅方向中央部に
突設され８胴内周面に密着して流路を閉止するシール部
と、前記各シールリングとスピンドル装着部材とで囲ま
れた２個の半円形状の各空間をその両面側からそれぞれ
閉止し外面が前記シールリングおよびスピンドル装着部
材と面一をなす平板状の少なくとも４枚の主板とを有し
、前記各シールリングを、スピンドル装着部材から周方
向に離れるに従って次第に狭幅になるように形成し、ス
ピンドルの軸方向に見た全体の外面形状をほぼ菱形状と
したことを特徴とする。(Summary of the Invention) The present invention provides a means for achieving the above object, and includes a spindle mounting member to which a spindle is mounted and which forms a center of rotation of a valve;
A pair of semicircular seal rings whose circumferential ends are welded to both longitudinal ends of the spindle mounting member and which form a circular shape as a whole; Two semicircular spaces surrounded by a seal portion that tightly closes the flow path, and each of the seal rings and the spindle mounting member are closed from both sides thereof, and the outer surface is the seal ring and the spindle mounting member. at least four main plates in the shape of a flat plate flush with the member, each of the seal rings being formed to have a width that gradually becomes narrower as it moves away from the spindle mounting member in the circumferential direction, when viewed in the axial direction of the spindle; The overall outer surface shape is approximately diamond-shaped.
以下、本発明を図面に示す実施例により説明する。 The present invention will be explained below with reference to embodiments shown in the drawings.
第１図ないし第３図において符号１１は弁体であり、こ
の弁体１１は、半円平板形状をなす４枚の主板１２と、
半円形状をなす左右一対のシールリング１３と、上部ス
ピンドルボス１４と、下部スピンドルボス１５と、補強
リブ１６．１７とから構成され、スピンドル軸方向に見
た外面形状が第２図に示すようにほぼ菱形状をなしてい
る。In FIGS. 1 to 3, reference numeral 11 is a valve body, and this valve body 11 has four main plates 12 each having a semicircular plate shape,
It is composed of a pair of left and right seal rings 13 in a semicircular shape, an upper spindle boss 14, a lower spindle boss 15, and reinforcing ribs 16 and 17, and the outer surface shape seen in the spindle axial direction is as shown in FIG. It is almost diamond-shaped.
前記各主板１２は、第３図ないし第５図に示すように、
シールリング１３、両スピンドルボス１４．１５および
補強リブ１６で囲まれた空間Ｓを閉止できる大きさの半
円形状に形成されており、その外面側の周縁には、第５
図に示すように、傾斜角度θが例えば４５度の開先１８
が形成されている。Each of the main plates 12, as shown in FIGS. 3 to 5,
It is formed into a semicircular shape large enough to close the space S surrounded by the seal ring 13, both spindle bosses 14, 15, and reinforcing ribs 16, and a fifth
As shown in the figure, the groove 18 has an inclination angle θ of 45 degrees, for example.
is formed.
また前記各シールリング１３は、第３図、第６図および
第７図に示すように、板厚方向に湾曲成形され、一対で
ほぼリング状をなり半円形状に形成されており、その外
面の幅方向中央部位「には、第７図および第８図に示す
ように外径側に山形に突出し弁閉時に図示しない弁胴内
周面に密着して射水作用をなずシール部１３ａが一体的
に設けられている。また各シールリング１３は、第３図
および第７図に示すように、周方向両端からｆｉすれる
に従って次第に狭幅となるように形成され、その幅方向
両端縁内周部には、第３図および第８図に示すように、
断面し形状をなす溝１９が切欠されている。そしてこの
溝１９には、各シールリング１３の周方向両端部を前記
各スピンドルボス１４゜１５の軸方向外端周面に溶接固
定した状態で前記主板１２の円弧縁部が配置さ、れ、開
先１８にそって施される溶接により溶接部２０が形成さ
れるようになっている。Further, as shown in FIGS. 3, 6, and 7, each of the seal rings 13 is curved in the thickness direction, and is formed in a semicircular shape as a pair, and its outer surface As shown in FIGS. 7 and 8, in the widthwise central portion of the valve, there is a seal portion 13a that protrudes in a chevron shape toward the outer diameter side and comes into close contact with the inner circumferential surface of the valve body (not shown) when the valve is closed, thereby preventing water injection. As shown in FIGS. 3 and 7, each seal ring 13 is formed so that it gradually becomes narrower as it moves from both ends in the circumferential direction, and both edges in the width direction As shown in FIGS. 3 and 8, the inner circumferential portion has
A groove 19 having a cross-sectional shape is cut out. The arcuate edge of the main plate 12 is disposed in this groove 19, with both circumferential ends of each seal ring 13 being welded and fixed to the axial outer end circumferential surface of each spindle boss 14, 15, A welded portion 20 is formed by welding along the groove 18.
前記各スピンドルボス１４．１５は、第１図ないし第３
図に示すように、軸方向内端が閉塞する筒状に形成され
ており、その内端相互間には、板幅方向を前記シールリ
ング１３の板幅方向と同一にする方形板状の補強リブ１
６が溶接され、両スピンドルボス１４，１５を相互に一
体に連結している。また、この補強リブ１６の板幅両端
に対応する両スピンドルボス１４．１５の外周面位置に
は、第３図および第９図に示すように、周方向中央部に
形成された突条部２１を介してその両側に断面し形状を
なす溝２２がそれぞれ設けられ、前記突条部２１は補強
リブ１６の板厚と同厚で軸方向に一体に連続するように
なっている。そして前記多溝２２には、第７図に示すよ
うに前記シールリング１３の弦縁部が配置され、開先１
８にそって施される溶接により溶接部２３が形成される
ようになっている。Each of the spindle bosses 14.15 is shown in FIGS. 1 to 3.
As shown in the figure, it is formed into a cylindrical shape with a closed inner end in the axial direction, and a rectangular plate-shaped reinforcement whose plate width direction is the same as the plate width direction of the seal ring 13 is provided between the inner ends. rib 1
6 is welded to integrally connect both spindle bosses 14 and 15 to each other. Furthermore, as shown in FIGS. 3 and 9, a protrusion 21 is formed at the center in the circumferential direction at the outer circumferential surface position of both spindle bosses 14.15 corresponding to both ends of the plate width of this reinforcing rib 16. A groove 22 having a cross-sectional shape is provided on both sides of the reinforcing rib 16, and the protrusion 21 has the same thickness as the reinforcing rib 16 and continues integrally in the axial direction. As shown in FIG. 7, the chordal edge of the seal ring 13 is arranged in the multi-groove 22, and the groove 1
A welded portion 23 is formed by welding along 8.
さらに、前記補強リブ１７は、第１図および第２図に示
すように、前記補強リブ１６の長手方向中央部に基端が
溶接されて補強リブ１６に対し直角状に延在しており、
その径方向先端は前記シールリング１３の内面に溶接固
定されている１、また補強リブ１７の板幅は、第２図に
示すように基端が補強リブ１６の板幅と同一で先端がシ
ールリング１３の補強リブ１７が溶接された部分の板幅
と同一になるように外径側に向かって次第に狭幅となる
テーパ状に形成されている。そして、この補強リブ１７
とその幅方向両面側に配される主板１２とは、第１０図
に示すように、例えば第３図５端に示づ主板１２とは両
側隅肉溶接２４により連結されるとともに、第３図上端
に示す主板１２とは断続的な栓溶接２５により連結され
るようになっている。Further, as shown in FIGS. 1 and 2, the reinforcing rib 17 has a base end welded to the longitudinal center portion of the reinforcing rib 16 and extends at right angles to the reinforcing rib 16,
The radial tip of the reinforcing rib 17 is welded to the inner surface of the seal ring 13.As shown in FIG. The reinforcing ribs 17 of the ring 13 are formed in a tapered shape that gradually becomes narrower toward the outer diameter side so that the reinforcing ribs 17 are the same as the plate width of the welded portion. And this reinforcing rib 17
As shown in FIG. 10, the main plate 12 disposed on both sides in the width direction is connected to, for example, the main plate 12 shown at the end in FIG. 3 by fillet welding 24 on both sides. It is connected to the main plate 12 shown at the upper end by intermittent plug welding 25.
このようにして、第２図に示すようにスピンドルボス１
４，１５の軸方向に見た際に外面形状が概略菱形状をな
す、すなわち両スピンドルボス１４．１５が主板１２の
外面から突出しない弁体１１が溶接により構成される。In this way, the spindle boss 1 is
The valve body 11 is constructed by welding so that the outer surface shape is approximately diamond-shaped when viewed in the axial direction of the main plate 12, that is, the spindle bosses 14 and 15 do not protrude from the outer surface of the main plate 12.
つぎに、前述した実施例の作用について説明する。Next, the operation of the above-described embodiment will be explained.
弁体１１の製作に際しては、まず第１図および第２図に
示すように、上部スピンドルボス１４と下部スピンドル
ボス１５とを対向させ、その間に補強リブ１６を溶接し
て両スピンドルボス１４゜１５を連結する。When manufacturing the valve body 11, first, as shown in FIGS. 1 and 2, the upper spindle boss 14 and the lower spindle boss 15 are opposed to each other, and a reinforcing rib 16 is welded between them, so that both spindle bosses 14 and 15 are aligned. Concatenate.
ついで、各シールリング１３を第３図に示す状態に配冒
し、その両端を各スピンドルボス１４゜１５に溶接する
。そしてその後、補強リブ１７を溶着する。Next, each seal ring 13 is placed in the state shown in FIG. 3, and its both ends are welded to each spindle boss 14 and 15. After that, the reinforcing ribs 17 are welded.
ついで、例えば第３図下端に示す２枚の主板１２を半円
状の空間Ｓを塞ぐように配置し、その周縁の開先１８に
形成される連続的な溶接部２０゜２３によりシールリン
グ１３、両スピンドルボス１４．１５および補強リブ１
６と連結する。この際、各主板１２の外面は、第２図、
第８図および第９図に示すように、シールリング１３、
両スピンドルボス１４，１５および補強リブ１６と完全
に面一となる。Next, for example, the two main plates 12 shown at the bottom end of FIG. , both spindle bosses 14.15 and reinforcing ribs 1
Connect with 6. At this time, the outer surface of each main plate 12 is as shown in FIG.
As shown in FIGS. 8 and 9, a seal ring 13,
It is completely flush with both spindle bosses 14, 15 and reinforcing rib 16.
その後、この主板１２と補強リブ１７とを、第１０図に
示すように両側隅肉溶接２４により連結する。Thereafter, the main plate 12 and the reinforcing ribs 17 are connected by fillet welding 24 on both sides, as shown in FIG.
ついで、第３図ｔａに示す２枚の主板１２を前述したと
同様の方法により配置し、その周縁を溶接部２０．２３
を介してシールリング１３、両スピンドルボス１４．１
５および補強リブ１６に面一に連結する。そしてその後
、この主板１２と補強リブ１７とを第１０図に示すよう
に栓溶接２５により連結し、弁体１１を完成させる。Next, the two main plates 12 shown in FIG.
Through the seal ring 13, both spindle bosses 14.1
5 and reinforcing ribs 16 in a flush manner. Thereafter, the main plate 12 and the reinforcing ribs 17 are connected by plug welding 25 as shown in FIG. 10 to complete the valve body 11.
本実施例によれば、表面に突出部がない菱形状の弁体１
１が構成されるので、渦流によるｔ）ｔ！￥損失や振動
を有効に防止し流水特性を向上させることができる。ま
た前記菱形状、の挟み角度は、スピンドル中心の最外端
からスピンドルボス１４゜１５の直径までを結ぶ角度で
あるが、（の値は８度ないし１５度程度と小さな値であ
るので、流水の剥離のおそれはない。According to this embodiment, the diamond-shaped valve body 1 has no protrusions on its surface.
1 is formed, so t)t! due to the eddy current! It can effectively prevent loss and vibration and improve water flow characteristics. In addition, the sandwiching angle of the diamond shape is the angle connecting the outermost end of the spindle center to the diameter of the spindle boss 14°15, but since the value of (is a small value of about 8° to 15°), There is no risk of peeling.
また主板１２は平板状をなしていて曲面板状をなす従来
のちのと比較して製作が容易であり、しかも従来必須で
あった切欠きを主板１２に設ける必要もないので、弁体
１１の製作時間および費用を大幅に削減できる。In addition, the main plate 12 has a flat plate shape, which is easier to manufacture than the conventional curved plate shape, and there is no need to provide the main plate 12 with a notch, which was conventionally essential. Production time and costs can be significantly reduced.
また主板１２は弁体１１の両側においてスピンドルの軸
方向全長に亘って溶接され、しかも弁体１１のこの部分
は最も厚幅で菱形の山部分、が位置しているので、流水
方向の水圧による曲げモーメントに対する強度を大幅に
向上させることができる。このため、構造物の薄肉化、
特に主板１２の薄肉化が可能となり、ｍｍを軽減できる
。また溶接はほとんどの部分が全周溶接となるので、溶
接の作業性がよく、しかも強度を向上させることができ
る。In addition, the main plate 12 is welded to both sides of the valve body 11 over the entire length in the axial direction of the spindle, and this part of the valve body 11 is the thickest and the diamond-shaped peak is located, so that the main plate 12 is welded on both sides of the valve body 11. The strength against bending moments can be significantly improved. For this reason, the structure becomes thinner,
In particular, the thickness of the main plate 12 can be made thinner, and the thickness in mm can be reduced. Furthermore, since most parts are welded all around, welding workability is good and strength can be improved.
なお、一方側の主板１２と補強リブ１７とは、第１０図
に示すように栓溶接２５となるが、補強リブ１７は主と
して弁体１１の変形を防止するために用いられるもので
水圧による曲げモーメントはそれほど加わらず、したが
って不連続の栓溶接２５でも強度的には充分である。The main plate 12 on one side and the reinforcing rib 17 are plug welded 25 as shown in FIG. Not much moment is applied, so even a discontinuous plug weld 25 is sufficient in terms of strength.
ただし、栓溶接２５すべき主板１２を補強リブ１７にそ
ってさらに２分割して扇状とし、分割部分に開先を設け
てこの部分を連続溶接するようにすれば、完全な全固溶
）妄も可能であり、これにより強度も高めることができ
る。However, if the main plate 12 to be plug welded is further divided into two parts along the reinforcing ribs 17 to form a fan shape, a groove is provided in the divided part, and this part is continuously welded, complete solid solution (all solid solution) is possible. It is also possible to increase the strength.
第１１図は本発明の伯の実施例を示づ゛もので、前記実
施例における両スピンドルボス１４，１５および補強リ
ブ１６に代え、両端にボス部を有する筒状一体のスピン
ドルボス２６を設番プたｂのであり、その他の点は前記
実施例と全く同一である。FIG. 11 shows an embodiment of the present invention, in which an integrated cylindrical spindle boss 26 having boss portions at both ends is provided in place of the spindle bosses 14, 15 and reinforcing rib 16 in the previous embodiment. The other points are exactly the same as the previous embodiment.
このように構成することにより、溶接箇所が減少して製
作作業が容易となるとともに、箇月がスピンドルＩＮ１
部に通して配されることになるので強度を向上さけるこ
とができる。By configuring in this way, the number of welding points is reduced, making the manufacturing work easier, and the number of welding points is reduced.
Since it is placed through the section, the strength can be improved.
以上説明したように本発明によれば、従来のもの比較し
て描漬が簡素化され、しかもスピンドル軸部分を水都と
する菱形状をなしているので充分な強度が得られる。As explained above, according to the present invention, drawing is simplified compared to the conventional method, and since the spindle shaft portion has a rhombic shape with a water capital, sufficient strength can be obtained.
また弁体外面に突出部がないので、流水特性を向上させ
ることができる。このため、海水中で使用しても海棲生
物が付着するおそれがなく、点検回数を減らして弁の寿
命を長くすることがＣぎる。Furthermore, since there is no protrusion on the outer surface of the valve body, water flow characteristics can be improved. Therefore, even when used in seawater, there is no risk of marine organisms adhering to the valve, making it possible to reduce the number of inspections and extend the life of the valve.
また充分な強度が得られるので、構造物の板厚、主とし
て主板の板厚を薄クシて軽量化およびコストダウンを図
ることができる。Furthermore, since sufficient strength can be obtained, the thickness of the structure, mainly the thickness of the main plate, can be reduced to reduce weight and cost.
第１図は本発明のバタフライ弁の実施例を示す弁体の正
面半断面図、第２図は第１図を上方から見た半断面図、
第３図は第１図の主要部分解斜視図、第４図は主板の正
２面図、第５図は第４図の■−ｖ線断面図、第６図はシ
ールリングの正面図、第７図は同平面図、第８図は第１
図の■−■線拡大断面図、第９図は第１図のｒＸ−ｒＸ
線拡大断面図、第１０図は第１図のＸ−Ｘａ拡大断面図
、第１１図は本発明の他の実施例を示す第１図相当図、
第１２図は従来のバタフライ弁の弁体を示す第１図相当
図、第１３図は同様の第２図相当図、第１４図および第
１５図は従来のバタフライ弁の流水特性および海棲生物
の付着の状態を示す第１２図ＸＩＶ−ＸＩＶ線拡大断面
相当図である。
１１・・・弁体、１２・・・主板、１３・・・シールリ
ング、１３ａ・・・シール部、１４・・・上部スピンド
ルボス、１５・・・下部スピンドルボス、１６．１７・
・・補強リブ、１９．２２・・・溝、２０．２３・・・
溶接部、２６・・・スピンドルボス。
出願人代理人 猪 股 清
佑１図
第２図
／１ｌ１１７３図
第４図
￥７７０
矛１２図
第１３図
怖１４図
殆１５図FIG. 1 is a front half-sectional view of a valve body showing an embodiment of the butterfly valve of the present invention, FIG. 2 is a half-sectional view of FIG. 1 viewed from above,
Fig. 3 is an exploded perspective view of the main parts of Fig. 1, Fig. 4 is a front view of the main plate, Fig. 5 is a sectional view taken along the line ■-v in Fig. 4, Fig. 6 is a front view of the seal ring, Figure 7 is the same plan view, Figure 8 is the first view.
Figure 9 is an enlarged sectional view of the line ■-■ in the figure, rX-rX of Figure 1.
10 is an enlarged sectional view along line X-Xa of FIG. 1, FIG. 11 is a view corresponding to FIG. 1 showing another embodiment of the present invention,
Figure 12 is a diagram equivalent to Figure 1 showing the valve body of a conventional butterfly valve, Figure 13 is a diagram equivalent to Figure 2, and Figures 14 and 15 are the flow characteristics and marine life of a conventional butterfly valve. FIG. 12 is an enlarged cross-sectional view taken along the line XIV-XIV in FIG. 12 showing the state of adhesion. DESCRIPTION OF SYMBOLS 11... Valve body, 12... Main plate, 13... Seal ring, 13a... Seal part, 14... Upper spindle boss, 15... Lower spindle boss, 16.17.
...Reinforcement rib, 19.22...Groove, 20.23...
Welding part, 26... spindle boss. Applicant's agent Kiyosuke Inomata 1 Figure 2/1l 1173 Figure 4 ¥770 Iku 12 Figure 13 Figure 14 Most 15 Figures
Claims (1)
ドル装着部材と、周方向両端がスピンドル装着部材の長
手方向両端にそれぞれ溶接され全体として円形をなす半
円形状の一対のシールリングと、各シールリングの外面
の幅方向中央部に突設され弁胴内周面に密着して流路を
閉止するシール部と、前記各シールリングとスピンドル
装着部材とで囲まれた２個の半円形状の各空間をその両
面側からそれぞれ閉止し外面が前記シールリングおよび
スピンドル装着部材と面一をなす平板状の少なくとも４
枚の主板とを有し、前記各シールリングを、スピンドル
装着部材から周方向に離れるに従って次第に狭幅になる
ように形成し、スピンドルの軸方向に見た全体外面形状
をほぼ菱形状としたことを特徴とするバタフライ弁。 ２、スピンドル装着部材を、一対のスピンドルがそれぞ
れ装着される２個のスピンドルボスと、両スピンドルボ
スを連結する補強リブとから構成したことを特徴とする
特許請求の範囲第１項記載のバタフライ弁。 ３、スピンドル装着部材を、一対のスピンドルが長手方
向両端からそれぞれ装着される筒状の１個のスピンドル
ボスで構成した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。[Claims] 1. A spindle mounting member to which a spindle is mounted and which forms the center of rotation of the valve, and a pair of semicircular shapes whose circumferential ends are welded to both longitudinal ends of the spindle mounting member, respectively, forming a circular shape as a whole. a seal ring, a seal portion protruding from the widthwise central portion of the outer surface of each seal ring and closely contacting the inner circumferential surface of the valve body to close the flow path, and surrounded by each of the seal rings and the spindle mounting member. At least four flat plate-shaped plates that close each of the two semicircular spaces from both sides and whose outer surfaces are flush with the seal ring and the spindle mounting member.
each seal ring is formed to have a width that gradually becomes narrower as it moves away from the spindle mounting member in the circumferential direction, and the overall outer surface shape when viewed in the axial direction of the spindle is approximately diamond-shaped. A butterfly valve featuring 2. The butterfly valve according to claim 1, wherein the spindle mounting member is composed of two spindle bosses to which a pair of spindles are respectively mounted, and a reinforcing rib that connects both spindle bosses. . 3. The butterfly valve according to claim 1, wherein the spindle mounting member is constituted by a single cylindrical spindle boss to which a pair of spindles are respectively mounted from both ends in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22735484A JPS61105373A (en) | 1984-10-29 | 1984-10-29 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22735484A JPS61105373A (en) | 1984-10-29 | 1984-10-29 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61105373A true JPS61105373A (en) | 1986-05-23 |
Family
ID=16859482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22735484A Pending JPS61105373A (en) | 1984-10-29 | 1984-10-29 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61105373A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1731805A1 (en) * | 2005-05-17 | 2006-12-13 | Wojciech Spalony | Disc of a butterfly valve and method to manufacture |
| CN100343559C (en) * | 2004-02-12 | 2007-10-17 | 株式会社巴技术研究所 | Valve body of butterfly valve |
| EP1959175A1 (en) * | 2007-02-13 | 2008-08-20 | Wojciech Spalony | Disc of butterfly valve and a method to manufacture |
| JP2011017349A (en) * | 2009-07-07 | 2011-01-27 | Kurimoto Ltd | Butterfly valve |
| KR20140108654A (en) * | 2012-01-03 | 2014-09-12 | 콘티넨탈 오토모티브 게엠베하 | Valve device for a motor vehicle |
| CN111486242A (en) * | 2020-04-25 | 2020-08-04 | 浙江富锐实业有限公司 | High-performance anti-seize energy-saving butterfly valve |
-
1984
- 1984-10-29 JP JP22735484A patent/JPS61105373A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343559C (en) * | 2004-02-12 | 2007-10-17 | 株式会社巴技术研究所 | Valve body of butterfly valve |
| EP1731805A1 (en) * | 2005-05-17 | 2006-12-13 | Wojciech Spalony | Disc of a butterfly valve and method to manufacture |
| EP1959175A1 (en) * | 2007-02-13 | 2008-08-20 | Wojciech Spalony | Disc of butterfly valve and a method to manufacture |
| JP2011017349A (en) * | 2009-07-07 | 2011-01-27 | Kurimoto Ltd | Butterfly valve |
| KR20140108654A (en) * | 2012-01-03 | 2014-09-12 | 콘티넨탈 오토모티브 게엠베하 | Valve device for a motor vehicle |
| JP2015503721A (en) * | 2012-01-03 | 2015-02-02 | コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ | Valve devices for automobiles |
| US10358986B2 (en) | 2012-01-03 | 2019-07-23 | Continental Automotive Gmbh | Valve device for a motor vehicle |
| CN111486242A (en) * | 2020-04-25 | 2020-08-04 | 浙江富锐实业有限公司 | High-performance anti-seize energy-saving butterfly valve |
| CN111486242B (en) * | 2020-04-25 | 2022-02-01 | 浙江富锐实业集团有限公司 | High-performance anti-seize energy-saving butterfly valve |
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