JPH0814325B2 - Bileaflet valve - Google Patents
Bileaflet valveInfo
- Publication number
- JPH0814325B2 JPH0814325B2 JP62298081A JP29808187A JPH0814325B2 JP H0814325 B2 JPH0814325 B2 JP H0814325B2 JP 62298081 A JP62298081 A JP 62298081A JP 29808187 A JP29808187 A JP 29808187A JP H0814325 B2 JPH0814325 B2 JP H0814325B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- rib
- plate
- bileaflet
- main plate
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は複葉弁に関するもので，特に主板と副板とを
連結するリブの形状に関する。TECHNICAL FIELD The present invention relates to a bileaflet valve, and more particularly to the shape of a rib connecting a main plate and a sub plate.
第３図及び第４図に従来の複葉弁を示す。第３図及び
第４図における複葉弁は弁胴01が２分割されていて，一
対の水平フランジ04によって円筒状に一体に形成され
る。3 and 4 show a conventional bileaflet valve. In the bileaflet valve shown in FIGS. 3 and 4, the valve body 01 is divided into two parts, which are integrally formed in a cylindrical shape by a pair of horizontal flanges 04.
弁体02は，弁閉における上流側の副板05と下流側の主
板06とを複数個の台形状のリブ07により，一体に溶接し
て形成されている。The valve body 02 is formed by integrally welding the upstream side sub-plate 05 and the downstream side main plate 06 in the valve closing state by a plurality of trapezoidal ribs 07.
複数個のリブ07の両側端縁A,Bは共に直線状に形成さ
れている。Both side edges A and B of the plurality of ribs 07 are both formed linearly.
弁の開閉は弁胴01の外部に突出し，弁体02と一体の弁
軸03を矢印の方向に回転させることによって行われる。
仮想線で示す弁体02′は弁開時を示し，実線は弁閉時を
示す。この種複葉弁は弁開時の流体の流れ損失が少ない
ことと，弁閉時の流体の漏洩が少ないために，水車の入
口弁や放水弁，ポンプの吐出弁及び鉄管弁等に適用され
ることが多い。The opening and closing of the valve is performed by protruding the outside of the valve body 01 and rotating the valve shaft 03 integrated with the valve body 02 in the direction of the arrow.
The valve body 02 'shown by the phantom line shows when the valve is open and the solid line shows when the valve is closed. This kind of bileaflet valve is applied to the inlet valve and water discharge valve of a water turbine, the discharge valve of a pump, the iron pipe valve, etc. because it has little loss of fluid flow when the valve is open and there is little leakage of fluid when the valve is closed. Often.
以上述べた従来の複葉弁は次のような問題点があっ
た。The conventional bileaflet valve described above has the following problems.
（１） 弁閉時の水圧は主板06に作用し，主板06を補強
するために複数個のリブ07と副板05を溶接してラーメン
構造としている。このような台形状のリブ07構造にあっ
ては，主板06の面積が副本05よりも大きいために，主板
06にかかる大きな荷重がリブ07を介して副板05に伝わ
る。このため副板05外周側の副板05とリブ07との溶接部
近傍Ｃに過大な荷重がかかる。このため，最悪の場合ク
ラックが発生することもある。(1) The water pressure when the valve is closed acts on the main plate 06, and in order to reinforce the main plate 06, a plurality of ribs 07 and sub plates 05 are welded together to form a rigid frame structure. In such a trapezoidal rib 07 structure, since the area of the main plate 06 is larger than that of the duplicate 05, the main plate 06
A large load applied to 06 is transmitted to the secondary plate 05 via the rib 07. Therefore, an excessive load is applied to the vicinity C of the welded portion between the sub plate 05 and the rib 07 on the outer peripheral side of the sub plate 05. Therefore, in the worst case, cracks may occur.
（２） この対策として，従来はリブ07の厚さを増した
り，リブ07の個数を多くする必要があり，コストの増加
及び弁開時の流れの損失増大を招いていた。(2) As a countermeasure against this, conventionally, it is necessary to increase the thickness of the ribs 07 or increase the number of the ribs 07, resulting in an increase in cost and a loss of flow when the valve is opened.
本発明は上記問題点のない複葉弁を提案するものであ
る。The present invention proposes a bileaflet valve which does not have the above problems.
本発明による複葉弁は，複葉弁の弁体の主板と副板と
を連結する複数のリブの両側縁部にそれぞれ，該副板側
より円弧をえがき，かつ，該円弧より連続して該主板の
外周方向に延びる切り欠きを設けたことを要旨とするも
のである。In the bileaflet valve according to the present invention, an arc is carved from the side of the subplate on both side edges of a plurality of ribs connecting the main plate and the subplate of the valve body of the bileaflet valve, and the main plate is continuous from the arc. The gist of the present invention is to provide a notch extending in the outer peripheral direction.
しかして，弁閉時において止水圧がもたらす主板から
副板への応力は主にリブへの引張り力として伝わるが，
本発明はリブに上述の形状の切り欠きを設けているの
で，第１図中における水平線Ｆより上の応力は切り欠き
より図中下側へ，つまり副板とリブとの連結面全体に一
様に伝わることとなる。Then, the stress from the main plate to the sub plate caused by the water stop pressure when the valve is closed is mainly transmitted as a tensile force to the rib,
According to the present invention, since the rib is provided with the notch having the above-described shape, the stress above the horizontal line F in FIG. 1 is lower than the notch in the figure, that is, on the entire connecting surface between the sub plate and the rib. Will be transmitted.
又，上記切り欠きの存在により，弁開時におけるカル
マン渦による振動応力値も大巾に低減できる。Further, due to the presence of the notch, the vibration stress value due to the Karman vortex when the valve is opened can be greatly reduced.
発明者らによるコンピュータ計算及び実験によって，
弁閉時の静荷重による応力値及び弁開時の振動応力値共
に約半減することが確認できた。By computer calculation and experiment by the inventors,
It was confirmed that both the stress value due to the static load when the valve was closed and the vibration stress value when the valve was opened were halved.
本発明による複葉弁の一実施例を第１図及び第２図を
参照して説明する。An embodiment of the bileaflet valve according to the present invention will be described with reference to FIGS. 1 and 2.
第１図及び第２図において，弁胴1,弁軸3,水平フラン
ジ4,副板5,主板６は従来のものと同一である。In FIGS. 1 and 2, the valve body 1, the valve shaft 3, the horizontal flange 4, the auxiliary plate 5, and the main plate 6 are the same as the conventional ones.
又，第１図中実線で示す弁体２は弁閉時,2点鎖線で示
す弁体２′は弁開時を示す。The valve element 2 shown by the solid line in FIG. 1 is when the valve is closed, and the valve element 2'shown by the two-dot chain line is when the valve is open.
弁体２の主板６と副板５とを連結するリブ７の両側縁
部にはそれぞれ，副板５側に円弧7a及びそれに連続して
主板６の外周方向に傾斜して延びる直線7bの切り欠きＤ
が設けられている。又，この切り欠きＤ部は弁開時の水
みだれを無くすために面取り加工としている。At both side edges of the rib 7 connecting the main plate 6 and the sub plate 5 of the valve body 2, a circular arc 7a is formed on the side of the sub plate 5 and a straight line 7b extending continuously from the arc 7a to the outer peripheral direction of the main plate 6 is cut. Missing D
Is provided. The cutout D is chamfered to eliminate water dripping when the valve is opened.
円弧7aの開始点つまり図中のｌ寸法は副板５とリブ７
とを溶接組立する場合には，溶接の脚長より大きくすれ
ばよく，リブ７の厚さをｔとした時,0.5t≦ｌ≦2tでよ
い。The starting point of the arc 7a, that is, the dimension l in the figure, is the sub plate 5 and the rib 7.
When welding and assembling, and, it is sufficient that the length is longer than the leg length of the welding, and 0.5t ≦ l ≦ 2t, where t is the thickness of the rib 7.
又，円弧7aは真円あるいは楕円，長円であってもよ
く，曲率を有するカーブでよい。The arc 7a may be a perfect circle, an ellipse, an ellipse, or a curve having a curvature.
副板５とリブ７とを鋳造により一体に形成する場合に
は上記ｌ寸法は設けなくてもよい。When the sub plate 5 and the rib 7 are integrally formed by casting, the above l dimension may not be provided.
上記実施例での切り欠きＤの円弧7aの底部Ｅと弁軸Ｇ
と平行の水平線Ｆとの角度θは15度としている。The bottom E of the arc 7a of the cutout D and the valve shaft G in the above embodiment
The angle θ with the horizontal line F parallel to is 15 degrees.
この角度θは,0＜θ≦30゜程度でよい。 This angle θ may be 0 <θ ≦ 30 °.
本実施例によれば，弁閉時における主板６からリブ７
への応力，特に第１図中における水平線Ｆより上の応力
は切り欠きＤの存在の為，ほぼ切り欠きＤ線と平行に伝
わり，最終的にリブ７と副板５との連結面に一様に伝わ
ることとなり，従来の第３図中のＣの部分への応力集中
となることはない。よって，リブ７の厚みｔを薄く，か
つ枚数を少なくすることができコスト低減がはかれると
ともに，流れ損失が減少する。又，切り欠きＤにより弁
開時においても特に弁体２′の下流側のリブ７における
水流のみだれが少くなり，振動応力が減少する。According to this embodiment, the main plate 6 to the rib 7 are closed when the valve is closed.
The stress applied to the horizontal line F in FIG. 1, especially the stress above the horizontal line F in FIG. 1, is transmitted substantially parallel to the cutout D line, and finally reaches the connecting surface between the rib 7 and the auxiliary plate 5. Therefore, the stress is not concentrated on the portion C in the conventional FIG. Therefore, the thickness t of the rib 7 can be reduced and the number of ribs 7 can be reduced to reduce the cost and reduce the flow loss. Further, due to the notch D, even when the valve is opened, drooling of the water flow in the rib 7 on the downstream side of the valve body 2'is reduced, and the vibration stress is reduced.
以上述べたように本発明による複葉弁によれば， （１） コストが低減する。 As described above, according to the bileaflet valve of the present invention, (1) the cost is reduced.
（２） 流れ損失が減少する。(2) Flow loss is reduced.
（３） 弁閉時の静的応力，円開時の振動応力が減少
し，クラック発生トラブルがなくなり，信頼性が向上す
る。(3) The static stress when the valve is closed and the vibration stress when the valve is open are reduced, the trouble of crack occurrence is eliminated, and the reliability is improved.
等の効果がある。And so on.
第１図は本発明による複葉弁の一実施例としての断面
図，第２図はその斜視図，第３図は従来の複葉弁の断面
図，第４図はその斜視図である。 ２……弁体,5……副板,6……主板,7……リブ,7a……円
弧,D……切り欠き。FIG. 1 is a sectional view showing an embodiment of a bileaflet valve according to the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a sectional view of a conventional bileaflet valve, and FIG. 4 is a perspective view thereof. 2 ... Valve, 5 ... Sub plate, 6 ... Main plate, 7 ... Rib, 7a ... Arc, D ... Notch.
Claims (1)
数のリブの両側縁部にそれぞれ，該副板側より円弧をえ
がき，かつ，該円弧より連続して該主板の外周方向に延
びる切り欠きを設けたことを特徴とする複葉弁。Claim: What is claimed is: 1. A plurality of ribs connecting a main plate and a sub-plate of a valve body of a bileaflet valve are provided with arcs from both sides of the sub-plate, and the outer periphery of the main plate is continuous from the arc. A bileaflet valve characterized by having a notch extending in the direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62298081A JPH0814325B2 (en) | 1987-11-26 | 1987-11-26 | Bileaflet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62298081A JPH0814325B2 (en) | 1987-11-26 | 1987-11-26 | Bileaflet valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01141278A JPH01141278A (en) | 1989-06-02 |
| JPH0814325B2 true JPH0814325B2 (en) | 1996-02-14 |
Family
ID=17854905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62298081A Expired - Lifetime JPH0814325B2 (en) | 1987-11-26 | 1987-11-26 | Bileaflet valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814325B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8893955B2 (en) | 2010-10-27 | 2014-11-25 | Intercontinental Great Brands Llc | Releasably closable product accommodating package |
-
1987
- 1987-11-26 JP JP62298081A patent/JPH0814325B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8893955B2 (en) | 2010-10-27 | 2014-11-25 | Intercontinental Great Brands Llc | Releasably closable product accommodating package |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01141278A (en) | 1989-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080214 Year of fee payment: 12 |