JPS6228350B2 - - Google Patents
Info
- Publication number
- JPS6228350B2 JPS6228350B2 JP56209056A JP20905681A JPS6228350B2 JP S6228350 B2 JPS6228350 B2 JP S6228350B2 JP 56209056 A JP56209056 A JP 56209056A JP 20905681 A JP20905681 A JP 20905681A JP S6228350 B2 JPS6228350 B2 JP S6228350B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- valve plate
- plate
- retainer
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 24
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 15
- 239000007787 solid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Description
【発明の詳細な説明】
本発明はバタフライ弁の創案に係り、弁箱の構
成を簡易化し且つ弁箱内に形成されたシール部に
対し剛体性弁座部体により常に好ましい接合シー
ル関係を形成せしめ、その開閉操作を円滑ならし
めると共に開閉作動時のトルク軽減を図り、又シ
ール接合部における損耗を減少することのできる
新しいバタフライ弁を提供しようとするものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a butterfly valve, which simplifies the structure of the valve body and always forms a favorable joint sealing relationship with the seal portion formed in the valve body by a rigid valve seat body. The object of the present invention is to provide a new butterfly valve that can smoothly open and close the valve, reduce the torque during the opening and close operation, and reduce wear and tear on the seal joint.
バタフライ弁は流路域内に設けられた弁体を開
閉作動して流体流通を開閉するものとして従来か
ら種々に採用されており、このバタフライ弁にお
いて安定したシール作用を図るために弾性力を有
せしめた剛体製の弁座を設けることについても若
干の提案がなされている。然しこのような従来の
ものにおける弁座は弁箱のシート部に設けられ、
これに弁板を作用させるものであつて、斯様な従
来のものによるときは流体圧を全面において受け
た弁板と弁座間で開閉されるので該流体圧が弁箱
弁座面に直接的な面圧力として作用しその接合シ
ール部における摩耗その他による損耗が大きい。
又弁箱の底部には該弁箱に取付けられた弁座部体
が位置し、その取付構造と相俟つてこの底部部分
にスラツジその他の固形分が附着滞留する傾向が
大でシール機能を損ない、特に可動弁座の摺動部
に侵入することにより作動不能を生じ易い欠点が
あり、更にその閉止位置における作動トルクが大
でその駆動機構や弁軸径が大とならざるを得ず、
コストアツプとなるなどの不利を有している。 Butterfly valves have been used in various ways to open and close fluid flow by opening and closing a valve body provided in a flow path area.In order to achieve a stable sealing effect, these butterfly valves have elastic force. Some proposals have also been made regarding providing a valve seat made of a rigid body. However, in such conventional valve seats, the valve seat is provided in the seat part of the valve body,
A valve plate acts on this, and when using such a conventional type, the valve plate is opened and closed between the valve plate and the valve seat, which receive fluid pressure on the entire surface, so the fluid pressure is directly applied to the valve seat surface of the valve body. This acts as surface pressure, causing significant wear and other damage at the joint seal.
In addition, the valve seat body attached to the valve box is located at the bottom of the valve box, and due to its mounting structure, there is a strong tendency for sludge and other solids to adhere and stay in this bottom part, impairing the sealing function. In particular, it has the disadvantage that it easily becomes inoperable due to intrusion into the sliding part of the movable valve seat, and furthermore, the operating torque at the closed position is large and the drive mechanism and valve shaft diameter must be large.
This method has disadvantages such as increased costs.
本発明は上記したような実情に鑑み検討を重ね
て創案されたものであつて、その具体的な実施態
様を添附図面に示すものについて説明すると、弁
箱１に板厚中心よりずれた位置に弁軸３，３を取
付けた弁板２が軸受部４で回動可能に取付けら
れ、即ち上記弁軸３，３は弁板２にピン５で固定
され、従動側の弁軸３の端部には段部３ａが形成
され、該段部３ａにスラストワツシヤ６が嵌着さ
れると共にスラストプレート８を止子９で取付け
ると共にノツクピン１０を施し、しかも端板７を
止着子１８で弁箱１に固定して弁板２の軸方向移
動を拘束するように成つている。上記したような
弁板２の周側には断面Ｔ型の弁座１１が取付けら
れ、即ち該弁座１１の内側部は止子１９によつて
弁板２に固定された環状のリテーナ１３によつて
弁板２の周側部分との間に挾持され、又弁板２の
周側部には発条１２を配設すると共にリテーナ１
３には該発条１２に対向した調整押圧子１６を配
設して発条１２の下流側に向けた適当な弾力条件
下に保持しているものであり、弁座１１と弁板２
の周面との間にはＯリング１４，１４が弁座内側
突部の両側に配設され、又弁板２とリテーナ１３
間にもＯリング１５が設けられている。前記した
弁座１１の弁箱シール面１ａに対する球面状接合
面１１ａは第２図に示すように弁箱１の軸心Ａ…
…Ａ上に中心をもつた球面の一部であり、前記弁
箱シール面１ａの弁箱上流側を大径とした円錐状
面と接触シールするものであるが、弁座１１は弁
板２の中間段部２ａとの間に適当な間隙ａを採
り、又弁板端面２ｂ，２ｃに対してスライド可能
に組みつけられたものであつて、しかも弁座１１
に対しては弁箱１と弁板周面２ｄとの間の間隙ｂ
からその受圧面１１ｂの幅ｌをもつた作用面に対
して流体圧ｐが作用するように成つており、この
流体圧ｐと前記発条１２による押圧力により弁箱
シール面１ａに対する前記接合面１１ａの圧縮シ
ールが得られるようにされ、しかもこの圧接シー
ル力は前記調整押圧子１６によつて適当に調整さ
れる。偏心軸３，３の一方（第１図における左方
のもの）は弁箱１に対しパツキング押え２０とグ
ランドパツキング２１の如きを以て回動可能に取
付けられたものであつて、このものに対し適当な
操作力が加えられることにより弁板２が開閉操作
されることは明かである。 The present invention has been devised after repeated studies in view of the above-mentioned circumstances, and the specific embodiment thereof is shown in the attached drawings. A valve plate 2 with valve stems 3, 3 attached is rotatably mounted on a bearing 4, that is, the valve stems 3, 3 are fixed to the valve plate 2 with a pin 5, and the end of the valve stem 3 on the driven side is fixed to the valve plate 2 with a pin 5. A step portion 3a is formed on the step portion 3a, a thrust washer 6 is fitted onto the step portion 3a, a thrust plate 8 is attached with a stopper 9, and a dowel pin 10 is provided. The valve plate 2 is fixed to the valve plate 2 to restrict movement of the valve plate 2 in the axial direction. A valve seat 11 having a T-shaped cross section is attached to the circumferential side of the valve plate 2 as described above, and the inner side of the valve seat 11 is attached to an annular retainer 13 fixed to the valve plate 2 by a stopper 19. Therefore, the retainer 1 is sandwiched between the circumferential portion of the valve plate 2, and the retainer 1 is disposed on the circumferential portion of the valve plate 2.
3 is provided with an adjustment pusher 16 facing the spring 12 to hold the spring 12 under appropriate elastic conditions toward the downstream side, and the valve seat 11 and the valve plate 2
O-rings 14, 14 are disposed on both sides of the valve seat inner protrusion between the valve plate 2 and the retainer 13.
An O-ring 15 is also provided in between. The spherical joint surface 11a of the valve seat 11 with respect to the valve box sealing surface 1a is aligned with the axis A of the valve box 1 as shown in FIG.
...It is a part of a spherical surface with its center on A, and it contacts and seals with a conical surface whose diameter is larger on the upstream side of the valve box of the valve box sealing surface 1a. An appropriate gap a is provided between the valve seat 11 and the intermediate step 2a of the valve seat 11, and the valve seat 11 is slidably assembled to the valve plate end surfaces 2b and 2c.
, the gap b between the valve body 1 and the valve plate circumferential surface 2d
A fluid pressure p is applied to the working surface having a width l of the pressure receiving surface 11b, and this fluid pressure p and the pressing force of the spring 12 cause the joint surface 11a to contact the valve box sealing surface 1a. A compressive seal of 100 mL is obtained, and this pressure sealing force is appropriately adjusted by the adjusting pusher 16. One of the eccentric shafts 3, 3 (the one on the left in Fig. 1) is rotatably attached to the valve body 1 using a packing presser 20, a gland packing 21, etc. It is clear that the valve plate 2 can be opened and closed by applying an appropriate operating force.
上記したような本発明によるものの作用につい
て説明すると、弁座１１と弁板２との間及びリテ
ーナ１３との間に介装された上流側と下流側のＯ
リング１４，１４並びに弁板２とリテーナ１３と
の間のＯリング１５によつて弁板２と弁座１１お
よびリテーナ１３の間に腐食性流体その他の異物
が侵入することを阻止し弁座１１の円滑な摺動を
確保せしめることは明かであり、又このような弁
座１１に関して前記調整押圧子１６を弁組立後に
おいて弁板２を閉塞位置にセツトし弁座１１を発
条１２の作用力で弁箱シール面１ａに押しつけた
状態で位置決めしナツト１７で固定させることに
より所定のシール関係を適切に得しめ且つこれを
適宜に調整することができる。蓋しこのようにし
て調整設定される本発明のものによるときは弁箱
シール面１ａに対するシール作用は弁板２によつ
て得られるものでなくて、弁板２とは別体の弁座
１１によつて得られ、従つて開閉操作に当つて弁
板２に相当に大きな流体圧が掛つても該流体圧が
そのまま前記弁箱シール面１ａに作用して該弁箱
シール面１ａ部分において強力な摺動摩擦を発生
し接合面間において摩耗を生ずることがなくな
る。前記した発条１２による弾力はＯリング１４
の摩擦力と弁座１１の重量に対応するものとして
設定しておけば流体圧による弁座１１の前記シー
ル面１ａに対する押しつけ力は次式のように得ら
れる。 To explain the operation of the device according to the present invention as described above, the upstream and downstream O
The rings 14, 14 and the O-ring 15 between the valve plate 2 and the retainer 13 prevent corrosive fluids and other foreign substances from entering between the valve plate 2, the valve seat 11, and the retainer 13. It is obvious that smooth sliding of the valve seat 11 can be ensured, and that the adjustment pusher 16 is set in the closed position after the valve is assembled, and the valve seat 11 is moved by the action force of the spring 12. By positioning it in a state where it is pressed against the valve box sealing surface 1a and fixing it with the nut 17, a predetermined sealing relationship can be appropriately obtained and this can be adjusted as appropriate. When the lid is adjusted and set in this manner according to the present invention, the sealing action on the valve box sealing surface 1a is not obtained by the valve plate 2, but by the valve seat 11 which is separate from the valve plate 2. Therefore, even if a considerably large fluid pressure is applied to the valve plate 2 during the opening/closing operation, the fluid pressure directly acts on the valve box sealing surface 1a, and a strong force is applied to the valve box sealing surface 1a. Generates sliding friction and eliminates wear between the joint surfaces. The elasticity due to the spring 12 described above is due to the O-ring 14.
If the frictional force is set to correspond to the weight of the valve seat 11, the pressing force of the valve seat 11 against the sealing surface 1a due to the fluid pressure can be obtained as shown in the following equation.
π／４（ds2−do2）Ｐ≪π／４ds2P 但し上式において dsは、弁座１１の接触基準径 doは、Ｏリング１４の外径 Ｐは、流体圧力である。 π/4(ds 2 −do 2 )P<<π/4ds 2 P In the above equation, ds is the contact reference diameter of the valve seat 11, do is the outer diameter of the O-ring 14, and P is the fluid pressure.
従つてds−doが一定であれば、弁が大径とな
り、又流体圧が高くなる程弁軸トルクは低減され
る。 Therefore, if ds-do is constant, the valve shaft torque will be reduced as the diameter of the valve increases and as the fluid pressure increases.
弁座１１が開閉される弁板２に取付けられた本
発明のものは該弁座１１が開閉に当つて流体の流
れの中において移動操作されることとなり、従つ
て流体中のスラツジその他の固形分が弁座１１に
附着堆積してもこの開閉作動に当つて有効に除去
洗浄されることとなり、それらの固形分がシール
部に噛み込まれてシール機能を損い、又このよう
なシール部に噛み込まれた固形分によつてシール
部を摩耗することがない。更に上記のように弁体
２側に取付けられる弁座１１はその断面形状を図
示実施態様のように断面Ｔ形の如きとして形成す
ることができ、それによつて該弁座１に適切な剛
性ないし形状保持性を附与できるからこの点にお
いても好ましいシール作用を確保することができ
る。 In the present invention, in which the valve seat 11 is attached to a valve plate 2 that is opened and closed, the valve seat 11 is moved in the flow of fluid when opening and closing, and therefore, sludge and other solids in the fluid are removed. Even if solids accumulate on the valve seat 11, they will be effectively removed and cleaned during this opening/closing operation, and these solids will get caught in the sealing part and impair the sealing function. The seal part will not be worn out by the solid content caught in the seal. Further, as described above, the valve seat 11 attached to the valve body 2 side can have a T-shaped cross section as shown in the illustrated embodiment, thereby giving the valve seat 1 appropriate rigidity or stiffness. Since shape retention can be imparted, a favorable sealing action can also be ensured in this respect.
以上説明したような本発明によれば弁軸３が弁
板２の板厚中心よりずれた位置に設けられたもの
であるから弁軸３の位置に妨害されることなく弁
箱において弁板周側面との間で好ましいシール接
合部を形成することができ、しかもこのような弁
板にリテーナを取付けて弁箱シール面１ａと接合
する弁座１１を保持せしめ、該弁座１１に流体圧
を作用させると共に発条１２と押圧調整子１６に
より所定の弾圧作用を与えるようにしたので常に
一定の弾力的シール作用を剛体性をもつた上記弁
座１１に与えて好ましい弁箱に対する閉塞シール
関係を形成し、又円錐形シール面に対し弁座の球
面状接合面で接合させるものであるからその弁軸
に対する開閉作動時のトルク軽減を図ると共に底
部に位置した弁箱シール面部分の構成が単純で、
開閉作動に当つて流体による弁座及び弁箱の接合
シール部に対する清掃を的確ならしめ、スラツジ
などの固形分によるシール障害やシール接合部の
摩耗をなからしめる等の作用効果を有しており、
工業的にその効果の大きい発明である。 According to the present invention as explained above, since the valve stem 3 is provided at a position offset from the center of the plate thickness of the valve plate 2, the circumference of the valve plate in the valve body can be adjusted without being obstructed by the position of the valve stem 3. A preferable sealing joint can be formed between the valve plate and the side surface, and a retainer can be attached to such a valve plate to hold the valve seat 11 in contact with the valve body sealing surface 1a, and fluid pressure can be applied to the valve seat 11. At the same time, a predetermined elastic action is applied by the spring 12 and the pressure regulator 16, so that a constant elastic sealing action is always applied to the rigid valve seat 11 to form a preferable closing sealing relationship with the valve body. In addition, since the conical seal surface is connected to the spherical joint surface of the valve seat, the torque applied to the valve shaft during opening and closing operations is reduced, and the structure of the valve body seal surface located at the bottom is simple. ,
During opening/closing operation, the valve seat and valve body joint seals are accurately cleaned by fluid, and it has the effect of eliminating seal failure due to solids such as sludge and wear of the seal joints. ,
This invention has great industrial effects.
図面は本発明の実施態様を示すものであつて、
第１図は本発明によるバタフライ弁の全般的な構
成関係を示した断面図、第２図はその弁座部分を
中心とした部分的な拡大断面図である。
然してこれらの図面において、１は弁箱、１ａ
はその円錐形シール面、２は弁板、２ａは中間段
部、２ｂ，２ｃはその端面、３は弁軸、１１は断
面Ｔ形の弁座、１１ａはその球面状接合面、１１
ｂはその受圧面、１２は発条、１３はリテーナ、
１４，１５はパツキング、１６は押圧調整子、１
７はナツトを示すものである。
The drawings illustrate embodiments of the invention,
FIG. 1 is a sectional view showing the general structural relationship of a butterfly valve according to the present invention, and FIG. 2 is a partially enlarged sectional view centered on the valve seat portion thereof. However, in these drawings, 1 is the valve box, 1a
2 is a conical sealing surface thereof, 2 is a valve plate, 2a is an intermediate step, 2b and 2c are end faces thereof, 3 is a valve stem, 11 is a valve seat with a T-shaped cross section, 11a is a spherical joint surface thereof, 11
b is its pressure receiving surface, 12 is a spring, 13 is a retainer,
14 and 15 are packing, 16 is a pressure adjuster, 1
7 represents nuts.
Claims (1)
偏つて設けられた弁軸により開閉可能な弁板を設
け、該弁板の中間段部にリテーナによつて環状の
断面Ｔ形弁座における脚部を挾持し、該弁座にお
ける上流側に流体圧を受ける受圧面１１ｂを形成
すると共に上記脚部と弁板における段部との間に
摺動間隙を形成し、しかも上記弁板に前記弁箱に
形成された円錐形シール面１ａに向けて該弁座を
圧接するための発条を設け、前記リテーナに該発
条による弾圧力を調整するための押圧調整子を対
設し、前記弁座のＴ形をなした周側部と弁板およ
びリテーナの間に夫々Ｏリングを介装すると共に
弁板とリテーナの間にもＯリングを介装し、上記
した断面Ｔ形弁座の周側に前記シール面と接合す
る球面状接合面を形成したことを特徴とするバタ
フライ弁。1 A valve plate that can be opened and closed by a valve shaft provided upstream of the flow path with respect to the center of the plate thickness is provided in the valve box, and an annular cross section T is provided at the intermediate stage of the valve plate by a retainer. A pressure receiving surface 11b is formed on the upstream side of the valve seat to sandwich the legs of the shaped valve seat, and a sliding gap is formed between the legs and the stepped part of the valve plate. A spring is provided on the valve plate for pressing the valve seat toward a conical sealing surface 1a formed in the valve box, and a pressure adjuster is provided on the retainer in opposition to adjust the elastic force due to the spring. , an O-ring is interposed between the T-shaped circumferential side of the valve seat, the valve plate and the retainer, and an O-ring is also interposed between the valve plate and the retainer, and the T-shaped cross-sectional valve described above is obtained. A butterfly valve characterized in that a spherical joint surface that joins with the sealing surface is formed on the circumferential side of the seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20905681A JPS58113666A (en) | 1981-12-25 | 1981-12-25 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20905681A JPS58113666A (en) | 1981-12-25 | 1981-12-25 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58113666A JPS58113666A (en) | 1983-07-06 |
| JPS6228350B2 true JPS6228350B2 (en) | 1987-06-19 |
Family
ID=16566517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20905681A Granted JPS58113666A (en) | 1981-12-25 | 1981-12-25 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58113666A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360252U (en) * | 1986-10-06 | 1988-04-21 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63109078U (en) * | 1987-01-06 | 1988-07-13 | ||
| JPS63109079U (en) * | 1987-01-07 | 1988-07-13 | ||
| KR100509237B1 (en) * | 2004-07-20 | 2005-08-22 | 주식회사 대한종합밸브 | Trunk seat ball style metal seat butter fly valve |
| US10428955B2 (en) | 2012-06-25 | 2019-10-01 | Hamilton Sundstrand Corporation | Contamination resistant butterfly valve |
| CN103486281B (en) * | 2013-09-23 | 2016-08-10 | 开封瑞科阀门有限公司 | Pretension, floating valve seat Bidirectional full metal hard seal butterfly valve |
| CN103603994B (en) * | 2013-11-29 | 2016-06-29 | 天津祥嘉流体控制系统有限公司 | A kind of double-eccentric ultralow temperature butterfly valve |
| JP6367078B2 (en) * | 2014-10-22 | 2018-08-01 | 株式会社栗本鐵工所 | Water stop structure of butterfly valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123050A (en) * | 1979-03-15 | 1980-09-22 | Okumura Seisakusho:Kk | Butterfly valve |
-
1981
- 1981-12-25 JP JP20905681A patent/JPS58113666A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123050A (en) * | 1979-03-15 | 1980-09-22 | Okumura Seisakusho:Kk | Butterfly valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360252U (en) * | 1986-10-06 | 1988-04-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58113666A (en) | 1983-07-06 |
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