JPS61130672A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPS61130672A JPS61130672A JP25179684A JP25179684A JPS61130672A JP S61130672 A JPS61130672 A JP S61130672A JP 25179684 A JP25179684 A JP 25179684A JP 25179684 A JP25179684 A JP 25179684A JP S61130672 A JPS61130672 A JP S61130672A
- Authority
- JP
- Japan
- Prior art keywords
- seal ring
- annular seal
- valve
- hollow annular
- valve body
- 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
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
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/228—Movable sealing bodies
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は水、蒸気、空気、その他特殊な流体の配管に
用いられるバタフライ弁に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a butterfly valve used in piping for water, steam, air, and other special fluids.
（従来の技術）
第７図に示すように従来のバタフライ弁の締切り方法は
弁箱ｌ内に組込んである弾性シールリングすなわち・弁
座２に８０°回転する鋼製弁体３のテーパ一部４を摩擦
摺動させる。(Prior Art) As shown in FIG. 7, the conventional butterfly valve shutoff method is to attach an elastic seal ring built into the valve body l, that is, a taper of a steel valve body 3 that rotates 80 degrees to the valve seat 2. Part 4 is frictionally slid.
（発明が解決しようとする問題点）
したがって、弁体３を回転させるには大きな回転トルク
が必要で有ると共に、鋼製弁体３の繰返し摩擦摺動によ
り弾性シールリング２に摩耗、損傷が生じ、内部流体の
漏洩や、寿命が短い等の欠点があった。(Problems to be Solved by the Invention) Therefore, a large rotational torque is required to rotate the valve body 3, and the repeated frictional sliding of the steel valve body 3 causes wear and damage to the elastic seal ring 2. However, there were disadvantages such as internal fluid leakage and short life.
この発明は従来のバタフライ弁のもつシール性能の欠点
を改良するもので低トルクでしかも確実に安定した気密
保持ができるバタフライ弁を提供しようとするものであ
る。This invention aims to improve the drawbacks of the sealing performance of conventional butterfly valves and to provide a butterfly valve that can maintain stable airtightness with low torque.
（問題点を解決するための手段）
この発明のバタフライ弁は、膨張収縮自在な中空環状シ
ールリングが弁座部に沿って固定されており、弁箱胴壁
を貫通する連通孔を通じて上記中空環状シールリング内
と圧力流体供給源とが連絡している。圧力流体として空
気、油、水などが用いられる。(Means for Solving the Problems) In the butterfly valve of the present invention, a hollow annular seal ring which can be expanded and contracted is fixed along the valve seat, and the hollow annular seal ring is inserted through a communication hole penetrating the valve body wall. Communication exists within the seal ring and a source of pressure fluid. Air, oil, water, etc. are used as the pressure fluid.
（作用）
バタフライ弁が開いているときは、中空環状シールリン
グ内には圧力流体は供給されておらず、−中空環状シー
ルリングは収縮した状、態にある。(Operation) When the butterfly valve is open, no pressure fluid is supplied to the hollow annular seal ring, and the hollow annular seal ring is in a contracted state.
バタ・ごフライ弁を閉じるときには、手動またはアまで
回転する。このとき、弁体のシール面は中空環状シール
リングに軽く接触しているか、または非接触の状態にあ
る。つぎに、連通孔を通じて上記中空環状シールリング
内に圧力流体を供給すると、中空環状シールリングは膨
張して弁体シール面に接触し、気密を保つ、なお、バタ
フライ弁内の流体の圧力に抗して中空環状シールリング
が膨張可能なように、中空環状シールリング内に供給さ
れる流体の圧力はバタフライ弁内の流体圧力よりも若干
高く設定されている。When closing the butterfly valve, turn it manually or to A. At this time, the sealing surface of the valve body is either in light contact with the hollow annular seal ring or in a non-contact state. Next, when pressure fluid is supplied into the hollow annular seal ring through the communication hole, the hollow annular seal ring expands and comes into contact with the sealing surface of the valve body, maintaining airtightness.It also resists the pressure of the fluid in the butterfly valve. The pressure of the fluid supplied within the hollow annular seal ring is set to be slightly higher than the fluid pressure within the butterfly valve so that the hollow annular seal ring can expand.
バタフライ弁を開くときは、連通孔を通して中空環状シ
ールリング内の圧力流体を放出し、中空環状・シールリ
ングが収縮した状態、すなわち中空環状シールリングが
弁体のシール面から離れた状態で弁体を回転する。When opening the butterfly valve, the pressure fluid inside the hollow annular seal ring is released through the communication hole, and the hollow annular seal ring is contracted, that is, the hollow annular seal ring is separated from the sealing surface of the valve body. Rotate.
（実施例）
第１図、第２図および第３図はこの発明の一実施例を示
しており、稀硫酸用バタフライ弁の例である。(Embodiment) FIGS. 1, 2, and 3 show an embodiment of the present invention, which is an example of a butterfly valve for dilute sulfuric acid.
第１図に示したように、弁箱１１は円胴部１２の中央に
外径方向に突出する上、下田筒部１３．１４を備えてお
り、円筒部１３．１４にはパツキン箱１Ｂが設けられて
いる。また、円胴部１２の両端に７ランジ１８．１９が
設けられている。As shown in FIG. 1, the valve box 11 includes a cylindrical portion 13.14 that protrudes in the outer diameter direction at the center of the cylindrical portion 12, and the cylindrical portion 13.14 has a packing box 1B. It is provided. Additionally, seven flanges 18, 19 are provided at both ends of the cylindrical portion 12.
入側の弁箱円胴部１２の上記円筒部１３．１４寄り内周
に弁座部２１が設けられており、この弁座部２１は後述
のように中空環状シールリング２５が固定される部分で
ある。弁座部２１は円筒部１３．１４の直下で内径方向
に突出する環状の段部２２を備えている。A valve seat portion 21 is provided on the inner periphery of the cylindrical portion 13, 14 of the valve box cylindrical portion 12 on the entry side, and this valve seat portion 21 is a portion to which a hollow annular seal ring 25 is fixed as will be described later. It is. The valve seat part 21 is provided with an annular step 22 which projects in the direction of the inner diameter just below the cylindrical part 13.14.
中空環状シールリング２５は第４図に示すように帯状ゴ
ムを折り曲げ、重ね合わせて環状に形成さ １れて
いる。すなわち、中空環状シールリング２５の外周部２
Ｂは弁箱円胴１２軸方向に延び、ゴム帯の両端部が重な
るようにして二重になっている。中空環状シールリング
２５の内周部は凹部２８とこれの両端からそれぞれ延び
る第１傾斜部２３および第２傾斜部３０とからなってい
る。第１傾斜部２９は上記外周部２Ｂと第１垂直部３１
を介してつながっている。As shown in FIG. 4, the hollow annular seal ring 25 is formed into an annular shape by bending and overlapping rubber bands. That is, the outer peripheral portion 2 of the hollow annular seal ring 25
B extends in the axial direction of the valve body cylinder 12, and is double layered so that both ends of the rubber band overlap. The inner periphery of the hollow annular seal ring 25 includes a recess 28 and a first slope 23 and a second slope 30 extending from both ends of the recess 28, respectively. The first inclined portion 29 is connected to the outer peripheral portion 2B and the first vertical portion 31.
are connected through.
第２傾斜部３０は後端（図面において左端）に設けられ
た角部３３に第２垂直部３２を介してつながっている。The second inclined portion 30 is connected to a corner portion 33 provided at the rear end (left end in the drawing) via a second vertical portion 32.
したがって、中空環状シールリング２５の中空断面はほ
ぼＤ形に形成されている。上記凹部２８と第１傾斜部２
９とが中空環状シールリング２５のシール面となる。凹
部２Ｂは中空環状シールリング２５内が無圧のときには
弧状に凹み、加圧されたときには弧状に膨れるように予
め成形加工されている。角部３３には中空環状シールリ
ング２５が環状を保持するように鋼リング３５が挿入さ
れている。Therefore, the hollow cross section of the hollow annular seal ring 25 is approximately D-shaped. The recessed portion 28 and the first inclined portion 2
9 becomes the sealing surface of the hollow annular seal ring 25. The recess 2B is formed in advance so that it is concave in an arc shape when there is no pressure inside the hollow annular seal ring 25, and expands in an arc shape when it is pressurized. A steel ring 35 is inserted into the corner 33 so that the hollow annular seal ring 25 maintains its annular shape.
上記のように構成された中空環状シールリング２５は環
状の固定金具３７により前記弁座部２１に固定される。The hollow annular seal ring 25 configured as described above is fixed to the valve seat portion 21 by an annular fixture 37.
すなわち、中空環状シールリング２５の第１垂直部３１
は上記弁座部２１の段部２２に接しており、角部３３は
固定金具３７の垂直部３８に接するとともに、平行部３
９により弁箱１１内周面に向かって押し付けられている
。また、中空環状シールリング２５の第２傾斜部３０は
固定金具３７の傾斜部４０に接している。固定金具３７
はボルト４２により入側フランジ１８に固定されている
。That is, the first vertical portion 31 of the hollow annular seal ring 25
is in contact with the stepped portion 22 of the valve seat portion 21, the corner portion 33 is in contact with the vertical portion 38 of the fixing fitting 37, and the parallel portion 3
9 is pressed toward the inner circumferential surface of the valve body 11. Further, the second inclined portion 30 of the hollow annular seal ring 25 is in contact with the inclined portion 40 of the fixture 37. Fixing metal fittings 37
is fixed to the entry side flange 18 with bolts 42.
弁箱円胴部１２の一箇所に胴壁を貫通する貫通孔４５が
設けられており、ここに口金４８が挿入されている０口
金４８の先端の７ランジ４７は中空環状シールリング２
５内にあって１口金４６にねじ込まれた接続金具４９を
締めることにより口金４Ｂは弁箱円胴部１２に固定され
る。A through hole 45 passing through the body wall is provided at one location of the valve body 12, and a flange 47 at the tip of the ferrule 48 into which the ferrule 48 is inserted is connected to the hollow annular seal ring 2.
The cap 4B is fixed to the valve body cylindrical portion 12 by tightening a connecting fitting 49 located in the valve body 5 and screwed into the cap 46.
接続金具４９は配管５１および電磁式切換弁５３を介し
て圧縮空気タンク５７に接続されている。The connecting fitting 49 is connected to a compressed air tank 57 via a pipe 51 and an electromagnetic switching valve 53.
前記上、下パツキン箱１Ｂにはグランドパツキン８１が
詰められており、それぞれシーリングカラー６２を介し
てカラー８３およびカバー６４で押さえられている。The upper and lower packing boxes 1B are filled with ground packings 81, which are held down by a collar 83 and a cover 64 via a sealing collar 62, respectively.
弁箱１１内には円板状の弁体Ｂ７が挿入されており、弁
棒７５が弁体６７を直径方向に貫通している。A disc-shaped valve body B7 is inserted into the valve box 11, and the valve stem 75 passes through the valve body 67 in the diametrical direction.
弁体８７の上、下外周寄りに、弁体６７の直角方向の穴
Ｂ８にブツシュ８８がはめ込まれており、ここでピン７
６により弁棒７５が固定されている。バタフライ弁が閉
じたときに、弁体６７のシール面７０は弁棒７５の軸線
より入側に位置している。また、弁体８７のシール面７
０の断面は円弧状をしており、ここが上記中空環状シー
ルリング２５に接する。Bushes 88 are fitted into holes B8 in the right angle direction of the valve body 67 near the upper and lower outer peripheries of the valve body 87, and the bushes 88 are fitted into the holes B8 in the right angle direction of the valve body 67.
6, the valve stem 75 is fixed. When the butterfly valve is closed, the sealing surface 70 of the valve body 67 is located on the entry side of the axis of the valve stem 75. In addition, the sealing surface 7 of the valve body 87
0 has an arcuate cross section, which contacts the hollow annular seal ring 25.
第４図に示すように中空環状シールリング２５内が無圧
状態にあり、弁体８７が全閉位置にあるとき、中空環状
シールリング２５の第１傾斜部２３と弁体θ７のシール
面７０との隙間は１〜２一層程度である。また、このと
き固定金具３７端面と弁体８７面との間隔は数ｍｍ程度
である。As shown in FIG. 4, when the inside of the hollow annular seal ring 25 is in a pressure-free state and the valve body 87 is in the fully closed position, the first inclined portion 23 of the hollow annular seal ring 25 and the sealing surface 70 of the valve body θ7 The gap between the two layers is about 1 to 2 layers. Further, at this time, the distance between the end face of the fixture 37 and the face of the valve body 87 is approximately several mm.
弁棒７５は下のパツキン箱１Ｂから延びて、上のパツキ
ン箱１０を貫通している。弁棒７５の下端はカラー７７
を介して上記カバー６４により回転自在に支持されてい
る。The valve stem 75 extends from the lower packing box 1B and passes through the upper packing box 10. The lower end of the valve stem 75 is a collar 77
It is rotatably supported by the cover 64 via.
上のパツキン箱１Ｂの上端にはスタンド８１を介してエ
アシリンダ８３が取り付（すられており、エアシリンダ
８３の駆動軸８４は弁棒７５の上端に接続されいる。エ
アシリンダ８３は弁棒７５すなわち弁体８７をほぼｅｏ
’″回転する。An air cylinder 83 is attached to the upper end of the upper packing box 1B via a stand 81, and a drive shaft 84 of the air cylinder 83 is connected to the upper end of the valve stem 75. 75, that is, the valve body 87 is approximately eo
'"Rotate.
上記構成において、弁箱１１．固定金具３７、および弁
体８７の接液部にはすべてゴムライニング８７が施され
ており、外部への漏洩部分はＯリング８９によりシール
されている。In the above configuration, the valve box 11. A rubber lining 87 is applied to all of the liquid contact parts of the fixing fitting 37 and the valve body 87, and leakage parts to the outside are sealed with an O-ring 89.
つぎに、上記のように構成されたバタフライ弁の開閉動
作について説明する。Next, the opening/closing operation of the butterfly valve configured as described above will be explained.
バタフライ弁が開いているときは、弁体Ｂ７は弁体面が
液体の流れに沿うような姿勢をしている。When the butterfly valve is open, the valve body B7 is in a posture such that its surface follows the flow of liquid.
このとき、切換弁５３の接続状態は第４図５示すように
位置Ａにあり、中空環状シールリング２５内は口金４Ｂ
、配管５１および切換弁５３を介して大気に開放してい
る。したがって、中空環状シールリング２５は収縮して
いる。At this time, the connection state of the switching valve 53 is at position A as shown in FIG.
, open to the atmosphere via piping 51 and switching valve 53. Therefore, the hollow annular seal ring 25 is contracted.
バタフライ弁を閉じるときには、エアシリンダ８３によ
り弁体８７を閉位置まで約９０”回転する。このとき、
弁体８７のシール面７０は第３図に示すように中空環状
シールリング２５とは接触していな ）い。When closing the butterfly valve, the air cylinder 83 rotates the valve body 87 approximately 90" to the closed position. At this time,
The sealing surface 70 of the valve body 87 is not in contact with the hollow annular seal ring 25, as shown in FIG.
弁体８７面が流体の流７９対！て垂直とな°て弁体Ｂ７
が閉位置に達すると、切換弁５３のソレノイド５４を励
磁して接続状態を位置Ｂにする。この結果、圧縮空気タ
ンク５７より口金４８を通じて中空環状シールリング２
５内に圧縮空気が供給される。弁内の流体圧力が２ｋｇ
／ｃ＋ｗ″程度であるに対し、圧縮空気の圧力は３〜４
ｋｇ／ｃ♂である。中空環状シールリング２５は第３図
に想像線で示すように凹部２８と第１傾斜部２９が弧状
に膨張して弁体シール面７０に接触し、気密を保つ、凹
部２８は前述のように無圧状態で凹むように形成されて
いるので、加圧状態になっても固定金具３７と弁体８７
との間にはみ出すことはない。87 surfaces of the valve body have 79 pairs of fluid flows! Vertical and valve body B7
When the switch reaches the closed position, the solenoid 54 of the switching valve 53 is energized to bring the connection state to position B. As a result, the hollow annular seal ring 2 is passed from the compressed air tank 57 through the base 48.
Compressed air is supplied within 5. Fluid pressure inside the valve is 2kg
/c+w'', whereas the pressure of compressed air is 3 to 4
kg/c♂. As shown in phantom lines in FIG. 3, the hollow annular seal ring 25 has a concave portion 28 and a first inclined portion 29 that expand in an arc shape and come into contact with the valve body sealing surface 70 to maintain airtightness. Since it is formed to be recessed in an unpressurized state, the fixing fitting 37 and the valve body 87 will remain intact even when pressurized.
There will be no protrusion between the two.
バタフライ弁を開くときは、切換弁５３のソレノイド５
４を消勢して接続状態を位置Ａにする。中空環状シール
リング２５内の圧縮空気は口金４６を通じて大気に開放
され、中空環状シールリング２５は収縮して、中空環状
シールリング２５と弁体８７との両シール面７０は離れ
る。このような状態でエアシリンダ８３を駆動して弁体
６７を開位置まで回転する。When opening the butterfly valve, use the solenoid 5 of the switching valve 53.
4 and set the connection state to position A. The compressed air in the hollow annular seal ring 25 is released to the atmosphere through the base 46, the hollow annular seal ring 25 contracts, and the sealing surfaces 70 between the hollow annular seal ring 25 and the valve body 87 are separated. In this state, the air cylinder 83 is driven to rotate the valve body 67 to the open position.
なお、第４図、第５図および第６図は中空環状シールリ
ング２５の変形実施例を示すものである。Note that FIGS. 4, 5, and 6 show modified embodiments of the hollow annular seal ring 25. FIG.
第５図は弁箱１１の入側の弁座部２１とはめ合う鋼環状
リング９０のや周部θ！に、中空断面がほぼＤ形に形成
された弾性、中空環状シールリング９２を加硫接着させ
、鋼環状リング８０および弾性中空環状シールリング８
２はいずれも環状の固定金具３７により、弁座２１の所
定の位置に固定保持される。FIG. 5 shows the circumference θ! of the steel annular ring 90 that fits into the valve seat 21 on the entry side of the valve body 11. An elastic hollow annular seal ring 92 having a substantially D-shaped hollow cross section is vulcanized and bonded to the steel annular ring 80 and an elastic hollow annular seal ring 8.
2 are both fixedly held at predetermined positions on the valve seat 21 by annular fixing fittings 37.
また、圧力流体を供給する口金９３は鋼環状リング９０
および弾性中空環状シールリング９２内にあって、弁箱
円胴部１２の一箇所に胴壁を貫通する０貫通孔４５には
１１口金９３にねじ込まれた接続金具９４は挿入固定し
であるものである。In addition, the base 93 for supplying pressure fluid has a steel annular ring 90.
and a connecting fitting 94 screwed into an 11 cap 93 is inserted and fixed in the 0 through hole 45 which is located in the elastic hollow annular seal ring 92 and penetrates through the body wall at one point of the valve body cylindrical portion 12. It is.
第５図は第４図に示したと同様に、弁箱１１の入側の弁
座部２１にはめ合う鋼環状リング９５の両端９８．９？
および内周部９８に弾性シール材９９が加硫接着しであ
る。鋼環状リング８５の内周部８８に加硫接着しである
弾性シール材９８の形状は、断面がほぼＤ形をした中空
環状ｌＯＯをしており、鋼環状リング３５および弾性シ
ール材９９は、接続フランジ １０１の固定により、弁
座部２１の所定の位置に固定されるもので、圧力流体を
供給する口金１０２部は第４図にて説明したと同一であ
る。FIG. 5 shows both ends 98.9 of a steel annular ring 95 that fits into the valve seat 21 on the entry side of the valve body 11, similar to that shown in FIG.
And an elastic sealing material 99 is vulcanized and adhered to the inner peripheral portion 98. The shape of the elastic sealing material 98, which is vulcanized and bonded to the inner peripheral part 88 of the steel annular ring 85, is a hollow annular lOO with a substantially D-shaped cross section. By fixing the connecting flange 101, the valve seat 21 is fixed at a predetermined position, and the mouthpiece 102 for supplying pressure fluid is the same as that described in FIG. 4.
第６図は鋼環状リング１０３の内周部１０４側より、断
面がＣ形をした弾性シール材１０５を被せたもので、鋼
環状リング １０３および弾性シール材１０５はそれぞ
れ接続フランジ１０６の接続により、弁箱１１の入側の
弁座部２１内に固定される。In FIG. 6, a steel annular ring 103 is covered with an elastic sealing material 105 having a C-shaped cross section from the inner circumference 104 side. It is fixed within the valve seat portion 21 on the entry side of the valve body 11.
鋼環状リング１０３の内周部１０４は環状段付部ａが設
けてあり、この環状段付部ａと弾性シール材１０５との
間は、はぼ断面がＤ形をした中空環状すとなっている。The inner peripheral part 104 of the steel annular ring 103 is provided with an annular stepped part a, and a hollow annular ring having a D-shaped cross section is formed between the annular stepped part a and the elastic sealing material 105. There is.
また、圧力流体の供給は、弁箱円胴部１２の一箇所に胴
壁を貫通する貫通孔１０７が設けてあり、ここに鋼環状
リング１０３にねじ込まれる接続金具 １０８が挿入固
定しであるものである。In addition, for the supply of pressure fluid, a through hole 107 is provided at one location of the valve body body 12, passing through the body wall, and a connecting fitting 108 screwed into the steel annular ring 103 is inserted and fixed therein. It is.
これら変形例のものは接続金具９４，１０８を弁箱円胴
部１２より取外すだけで、容易に弾性中空環状シールリ
ング９２、弾性シール材９８．１０５の交換ができ、か
つ前記中空環状シールリング２５に比べ成形が容易なた
め、製作コストを安くできる等の利点を有している。In these modified examples, the elastic hollow annular seal ring 92 and the elastic sealing material 98 and 105 can be easily replaced by simply removing the connecting fittings 94 and 108 from the valve body cylindrical portion 12, and the hollow annular seal ring 25 can be easily replaced. Since it is easier to mold than , it has the advantage of lower manufacturing costs.
この発明は上記実施例に限られるものではなく、たとえ
ば取り扱う流体の種類によってはライニングは省略して
もよく、また空気圧の代りに油圧を用いて中空環状シー
ルリングを膨張させるようにしてもよい。The present invention is not limited to the above embodiments; for example, the lining may be omitted depending on the type of fluid to be handled, and the hollow annular seal ring may be expanded using hydraulic pressure instead of air pressure.
（発明の効果）
この発明のバタフライ弁は弁箱内を流れる流体の気密保
持が従来の様に弾性シールリングに摩擦摺動させて行な
うものでなく、中空環状シールリングの膨張収縮により
行なう、したがって、シールリングの摩耗、損傷がなく
、確実に安定した気密性を保持できる。ｔた。弁体は中
空環状シールリングに接触せずに回動させるので、回動
に必要なトルクは小さくて済み、バタフライ弁全体をコ
へ
ンパクトにできる等の利点がある。(Effects of the Invention) The butterfly valve of the present invention maintains the airtightness of the fluid flowing inside the valve box by expanding and contracting the hollow annular seal ring, rather than by frictionally sliding it on an elastic seal ring as in the conventional case. , there is no wear or damage to the seal ring, and stable airtightness can be maintained reliably. It was. Since the valve body is rotated without contacting the hollow annular seal ring, the torque required for rotation is small, and there are advantages such as the ability to make the entire butterfly valve compact.
第１図はこの発明の一実施例を示すもので、バタフライ
弁の縦断面図、第２図は第１図に示すバタフライ弁の一
部を示す正面図、Ｗ２Ｂ図は第２図のｍ−■線に沿う断
面の拡大図、第４図、第５図、第６図はそれぞれこの発
明の他の実施例を示す図、および５４７図は従来のバタ
フライ弁の縦断面図である。
１．１１・・・弁箱、２．２１・・・弁座部、２５・・
・中空環状シールリング、３７・・・固定金具、４５・
・・貫通孔、５３・・・切換弁、５７・・・圧縮空気タ
ンク、８３・・・エアシリンダ。FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a butterfly valve, FIG. 2 is a front view showing a part of the butterfly valve shown in FIG. FIG. 4, FIG. 5, and FIG. 6 are views showing other embodiments of the present invention, respectively, and FIG. 547 is a longitudinal cross-sectional view of a conventional butterfly valve. 1.11... Valve box, 2.21... Valve seat, 25...
・Hollow annular seal ring, 37...Fixing bracket, 45・
...Through hole, 53...Switching valve, 57...Compressed air tank, 83...Air cylinder.
Claims (1)
固定され、弁箱胴壁を貫通する連通孔を通じて前記中空
環状シールリング内と圧力流体供給源とが連絡している
ことを特徴とするバタフライ弁。A hollow annular seal ring that is expandable and deflated is fixed along the valve seat, and the inside of the hollow annular seal ring is in communication with a pressure fluid supply source through a communication hole penetrating the valve body wall. Butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25179684A JPS61130672A (en) | 1984-11-30 | 1984-11-30 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25179684A JPS61130672A (en) | 1984-11-30 | 1984-11-30 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130672A true JPS61130672A (en) | 1986-06-18 |
| JPH0474591B2 JPH0474591B2 (en) | 1992-11-26 |
Family
ID=17228056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25179684A Granted JPS61130672A (en) | 1984-11-30 | 1984-11-30 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130672A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005103537A1 (en) * | 2003-05-01 | 2005-11-03 | Asahi Organic Chemicals Industry Co. Ltd. | Seat ring with insert for butterfly valve and metho of manufacturing the same |
| KR101107551B1 (en) * | 2009-06-12 | 2012-01-31 | 서광공업 주식회사 | Butterfly valve enableing to maintain sealing pressrue |
| US8978172B2 (en) | 2009-11-17 | 2015-03-17 | Kohler Co. | Plumbing fixture having modular control housing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121366A (en) * | 1982-01-12 | 1983-07-19 | Kubota Ltd | Operating method of valve |
-
1984
- 1984-11-30 JP JP25179684A patent/JPS61130672A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121366A (en) * | 1982-01-12 | 1983-07-19 | Kubota Ltd | Operating method of valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005103537A1 (en) * | 2003-05-01 | 2005-11-03 | Asahi Organic Chemicals Industry Co. Ltd. | Seat ring with insert for butterfly valve and metho of manufacturing the same |
| US7637478B2 (en) | 2003-05-01 | 2009-12-29 | Asahi Organic Chemicals Industry Co., Ltd. | Seat ring with insert for butterfly valve, and manufacturing method thereof |
| KR101107551B1 (en) * | 2009-06-12 | 2012-01-31 | 서광공업 주식회사 | Butterfly valve enableing to maintain sealing pressrue |
| US8978172B2 (en) | 2009-11-17 | 2015-03-17 | Kohler Co. | Plumbing fixture having modular control housing |
| US9689156B2 (en) | 2009-11-17 | 2017-06-27 | Kohler Co. | Plumbing fixture having modular control housing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0474591B2 (en) | 1992-11-26 |
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