JP3801278B2 - Spherical valve - Google Patents

Spherical valve Download PDF

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Publication number
JP3801278B2
JP3801278B2 JP28130396A JP28130396A JP3801278B2 JP 3801278 B2 JP3801278 B2 JP 3801278B2 JP 28130396 A JP28130396 A JP 28130396A JP 28130396 A JP28130396 A JP 28130396A JP 3801278 B2 JP3801278 B2 JP 3801278B2
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Japan
Prior art keywords
valve
valve body
opening
mounting flange
divided
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
Application number
JP28130396A
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Japanese (ja)
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JPH10110836A (en
Inventor
満 有本
清 生田
孝幸 後藤
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP28130396A priority Critical patent/JP3801278B2/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Valve Housings (AREA)
  • Taps Or Cocks (AREA)
  • Hydraulic Turbines (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は水車用入口弁、揚水発電所用主止め弁等に好適な球形弁に関する。
【０００２】
【従来の技術】
従来のこの種球形弁の１例が図２ないし図４に示され、図２は縦断面図、図３は図２のＡ−Ａ線に沿う部分的横断面図、図４は図３の部分的拡大横断面図である。
図２ないし図４において、１は円筒状流路1aを具えた弁体で、その外周には円筒状流路1aと直交する方向に伸びる一対の弁軸10が一体に形成されている。
【０００３】
２は球状の弁胴で、その上流側フランジ2aは上流側管３にボルト４で締結され、下流側フランジ2bは下流側管５にボルト６で締結されている。
そして、この弁胴２はその中央部、即ち、弁軸10の軸芯を含む面でほぼ対称に２分割され、２分割することによって構成された分割弁胴2Aと分割弁胴2Bの分割面23に形成された分割フランジ2cと2dはボルト７及び17によって相互に締結されている。
【０００４】
弁軸10は図３及び図４に示すように、弁胴２に形成された開口20を貫通して外部に突出している。
開口20の近傍の分割フランジ2c、2dは肉厚とされ、かつ、大径のボルト17によって締結される。
【０００５】
分割フランジ2c、2dの分割面23に削設されたパッキン溝24内にはパッキン25が嵌合され、このパッキン25の端はこれと直交するように設置された円周パッキン26に当接している。
弁軸10の外周には弁軸スリーブ21が嵌装され、この弁軸スリーブ21と摺接するブッシュ22を抱持する円筒状のブッシュケース23が弁胴２に固定されている。
【０００６】
しかして、弁軸10を回転駆動することによって弁体１は弁胴２内で回転し、図示の全閉状態では弁体１の上流側はシールリング８及びリテーナリング９を介して上流側管３に接合され、下流側はシールリング19及びリテーナリング20を介して下流側管５に接合される。
この全閉状態から弁軸10を90°回転すると、弁体１は図２の２点鎖線で示す全開状態となり、液体は白抜矢印方向に流過する。
【０００７】
【発明が解決しようとする課題】
上記従来の球形弁においては、開口20の近傍の弁胴２に作用する大きな液体圧に耐えるため、開口20の近傍のフランジ2c、2dの肉厚を大きくするとともにボルト17の径を大きくしているが、依然開口20の近傍において弁胴2A、2Bが外側に拡開する傾向があるため、液体が開口20と弁軸10との間に形成された隙間を通って外部に漏洩するおそれがあった。
【０００８】
【課題を解決するための手段】
本発明は上記課題を解決するために発明されたものであって、その要旨とするところは、弁体が収納される球状の弁胴が分割面で２分割可能とされ、この分割面上に伸びる弁軸が上記弁胴の開口を貫通する球形弁において、上記弁軸の外周に配設されたブッシュを抱持する円筒状のブッシュケースを上記開口を貫通させてその外端に取付フランジを形成し、この取付フランジを上記開口の近傍において各分割弁胴の外面に形成された取付面に締結するとともにこの取付フランジの内側面に形成された凸部又は凹部を上記取付面に形成された凹部又は凸部に嵌合したことを特徴とする球形弁にある。
【０００９】
【発明の実施の形態】
本発明の実施形態が図１に示されている。
ブッシュ22を抱持する円筒状のブッシュケース23は開口20を貫通し、その外端には円盤状の取付フランジ31が形成されている。
【００１０】
この取付フランジ31は開口20の近傍において分割弁胴2A、2Bの外面に形成された取付面33に複数のボルト35によって締結される。
取付フランジ31の内側面の周縁には円環状の凸部32が突設され、この凸部32は取付面33に穿設された円環状の凹部34内に嵌合している。
【００１１】
ブッシュケース23の外端部内周面に形成されたパッキン溝39内にはパッキン40が設置され、円環状のパッキン押え37が複数のボルト38によって取付フランジ31の外面に締結されている。
他の構成は図２ないし図４に示す従来のものと同様であり、対応する部材には同じ符号を付してその説明を省略する。
【００１２】
しかして、取付フランジ31が各分割弁胴2A、2Bに複数のボルト35によって締結され、かつ、取付フランジ31の凸部32が各分割弁胴2A、2Bの凹溝34内に嵌合されているため、開口20の近傍に大きな液体圧が作用した場合であっても分割弁胴2A、2Bが開口20の近傍で拡開するのを阻止することができる。
【００１３】
この結果、開口20の近傍のフランジ2c、2dの厚さ及びボルト17の径を従来のものより小さくすることができるとともに開口20と弁胴10との間に形成される隙間から液体が外部に漏洩するのを防止しうる。
【００１４】
上記実施形態においては、取付フランジ31に凸部32を形成し、この凸部32を取付面33に形成された凹部34内に嵌合しているが、取り付けフランジ31に凹部を形成し、この凹部内に取付面33に形成された凸部を嵌合することができる。
【００１５】
【発明の効果】
本発明においては、弁軸の外周に配設されたブッシュを抱持する円筒状のブッシュケースを開口を貫通させてその外端に取付フランジを形成し、この取付フランジを開口の近傍において各分割弁胴の外面に形成された取付面に締結するとともにこの取付フランジの内側面に形成された凸部又は凹部を取付面に形成された凹部又は凸部に嵌合したため、開口の近傍において各分割弁胴が拡開するのを防止できる。
この結果、弁軸と開口との間に形成される隙間から液体が外部に漏洩するのを防止できるとともに開口の近傍のフランジの厚さやボルトの径を従来のものに比し小さくすることができる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す図４に対応する部分的拡大横断面図である。
【図２】従来の球形弁の縦断面図である。
【図３】図２のＡ−Ａ線に沿う部分的横断面図である。
【図４】図２の部分的拡大横断面図である。
【符号の説明】
２ 弁胴
2A、2B 分割弁胴
2c、2d 分割フランジ
７、17 ボルト
１ 弁体
10 弁軸
21 スリーブ
22 ブッシュ
23 分割面
24、39 パッキン溝
25、26、40 パッキン
23 ブッシュケース
31 取付フランジ
32 凸部
33 取付面
34 凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spherical valve suitable for a water turbine inlet valve, a main stop valve for a pumped storage power plant, and the like.
[0002]
[Prior art]
An example of this conventional spherical valve is shown in FIGS. 2 to 4, in which FIG. 2 is a longitudinal sectional view, FIG. 3 is a partial transverse sectional view along line AA in FIG. 2, and FIG. It is a partial expanded cross-sectional view.
2 to 4, reference numeral 1 denotes a valve body having a cylindrical channel 1a, and a pair of valve shafts 10 extending in a direction perpendicular to the cylindrical channel 1a are integrally formed on the outer periphery thereof.
[0003]
A spherical valve body 2 has an upstream flange 2a fastened to the upstream pipe 3 by a bolt 4 and a downstream flange 2b fastened to the downstream pipe 5 by a bolt 6.
The valve body 2 is divided into two substantially symmetrically at the central portion thereof, that is, the surface including the axis of the valve shaft 10, and divided surfaces of the divided valve body 2A and the divided valve body 2B formed by dividing into two parts. The split flanges 2c and 2d formed on 23 are fastened to each other by bolts 7 and 17.
[0004]
As shown in FIGS. 3 and 4, the valve shaft 10 passes through an opening 20 formed in the valve body 2 and protrudes to the outside.
The split flanges 2c and 2d in the vicinity of the opening 20 are thick and fastened by a large-diameter bolt 17.
[0005]
A packing 25 is fitted in a packing groove 24 cut on the split surface 23 of the split flanges 2c and 2d, and an end of the packing 25 abuts on a circumferential packing 26 installed so as to be orthogonal thereto. Yes.
A valve shaft sleeve 21 is fitted on the outer periphery of the valve shaft 10, and a cylindrical bush case 23 that holds a bush 22 in sliding contact with the valve shaft sleeve 21 is fixed to the valve body 2.
[0006]
Thus, by rotating the valve shaft 10, the valve body 1 rotates in the valve body 2, and in the fully closed state shown in the drawing, the upstream side of the valve body 1 passes through the seal ring 8 and the retainer ring 9 to the upstream side pipe. 3, and the downstream side is joined to the downstream pipe 5 via the seal ring 19 and the retainer ring 20.
When the valve shaft 10 is rotated by 90 ° from this fully closed state, the valve body 1 enters a fully open state indicated by a two-dot chain line in FIG. 2, and the liquid flows in the direction of the white arrow.
[0007]
[Problems to be solved by the invention]
In the conventional spherical valve, in order to withstand a large liquid pressure acting on the valve body 2 in the vicinity of the opening 20, the thickness of the flanges 2c and 2d in the vicinity of the opening 20 is increased and the diameter of the bolt 17 is increased. However, since the valve bodies 2A and 2B still tend to expand outward in the vicinity of the opening 20, there is a risk that liquid may leak to the outside through a gap formed between the opening 20 and the valve shaft 10. there were.
[0008]
[Means for Solving the Problems]
The present invention has been invented in order to solve the above-mentioned problems. The gist of the present invention is that a spherical valve body in which a valve body is accommodated can be divided into two on a divided surface, and on this divided surface. In a spherical valve in which an extending valve shaft passes through the opening of the valve body, a cylindrical bush case for holding a bush disposed on the outer periphery of the valve shaft is passed through the opening and a mounting flange is provided at the outer end thereof. The mounting flange is fastened to a mounting surface formed on the outer surface of each split valve body in the vicinity of the opening, and a convex portion or a concave portion formed on the inner surface of the mounting flange is formed on the mounting surface. A spherical valve characterized by being fitted into a concave portion or a convex portion.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention is shown in FIG.
A cylindrical bush case 23 for holding the bush 22 passes through the opening 20, and a disc-shaped mounting flange 31 is formed at the outer end thereof.
[0010]
The mounting flange 31 is fastened by a plurality of bolts 35 to a mounting surface 33 formed on the outer surface of the split valve bodies 2A and 2B in the vicinity of the opening 20.
An annular convex portion 32 protrudes from the periphery of the inner surface of the mounting flange 31, and this convex portion 32 is fitted in an annular concave portion 34 formed in the mounting surface 33.
[0011]
A packing 40 is installed in a packing groove 39 formed on the inner peripheral surface of the outer end portion of the bush case 23, and an annular packing presser 37 is fastened to the outer surface of the mounting flange 31 by a plurality of bolts 38.
Other configurations are the same as those of the conventional one shown in FIGS. 2 to 4, and corresponding members are denoted by the same reference numerals and description thereof is omitted.
[0012]
Thus, the mounting flange 31 is fastened to each divided valve body 2A, 2B by a plurality of bolts 35, and the convex portion 32 of the mounting flange 31 is fitted into the concave groove 34 of each divided valve body 2A, 2B. Therefore, even when a large liquid pressure acts near the opening 20, it is possible to prevent the divided valve bodies 2A and 2B from expanding near the opening 20.
[0013]
As a result, the thickness of the flanges 2c and 2d in the vicinity of the opening 20 and the diameter of the bolt 17 can be made smaller than those of the conventional one, and the liquid can be discharged to the outside through a gap formed between the opening 20 and the valve body 10. It can prevent leakage.
[0014]
In the above embodiment, the convex portion 32 is formed on the mounting flange 31, and the convex portion 32 is fitted in the concave portion 34 formed on the mounting surface 33. A convex portion formed on the mounting surface 33 can be fitted into the concave portion.
[0015]
【The invention's effect】
In the present invention, a cylindrical bush case holding a bush arranged on the outer periphery of the valve shaft is made to penetrate the opening to form a mounting flange at the outer end, and this mounting flange is divided into each part in the vicinity of the opening. Since it is fastened to the mounting surface formed on the outer surface of the valve body and the convex portion or concave portion formed on the inner surface of this mounting flange is fitted to the concave portion or convex portion formed on the mounting surface, each split in the vicinity of the opening It is possible to prevent the valve body from expanding.
As a result, liquid can be prevented from leaking to the outside through a gap formed between the valve shaft and the opening, and the thickness of the flange near the opening and the diameter of the bolt can be reduced as compared with the conventional one. .
[Brief description of the drawings]
FIG. 1 is a partially enlarged cross-sectional view corresponding to FIG. 4 showing an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a conventional spherical valve.
FIG. 3 is a partial cross-sectional view taken along line AA in FIG.
4 is a partially enlarged cross-sectional view of FIG.
[Explanation of symbols]
2 Valve body
2A, 2B split valve body
2c, 2d Split flange 7, 17 Bolt 1 Valve body
10 Valve stem
21 sleeve
22 Bush
23 Dividing plane
24, 39 Packing groove
25, 26, 40 Packing
23 Bush case
31 Mounting flange
32 Convex
33 Mounting surface
34 Recess

Claims (1)

弁体が収納される球状の弁胴が分割面で２分割可能とされ、この分割面上に伸びる弁軸が上記弁胴の開口を貫通する球形弁において、
上記弁軸の外周に配設されたブッシュを抱持する円筒状のブッシュケースを上記開口を貫通させてその外端に取付フランジを形成し、この取付フランジを上記開口の近傍において各分割弁胴の外面に形成された取付面に締結するとともにこの取付フランジの内側面に形成された凸部又は凹部を上記取付面に形成された凹部又は凸部に嵌合したことを特徴とする球形弁。In the spherical valve in which the spherical valve body in which the valve body is accommodated can be divided into two at the dividing surface, and the valve shaft extending on the dividing surface passes through the opening of the valve body,
A cylindrical bush case holding a bush disposed on the outer periphery of the valve shaft is made to pass through the opening to form a mounting flange at the outer end thereof, and this mounting flange is connected to each divided valve cylinder in the vicinity of the opening. A spherical valve characterized in that it is fastened to a mounting surface formed on the outer surface of the mounting flange, and a convex portion or a concave portion formed on the inner surface of the mounting flange is fitted to the concave portion or the convex portion formed on the mounting surface.
JP28130396A 1996-10-03 1996-10-03 Spherical valve Expired - Lifetime JP3801278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28130396A JP3801278B2 (en) 1996-10-03 1996-10-03 Spherical valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28130396A JP3801278B2 (en) 1996-10-03 1996-10-03 Spherical valve

Publications (2)

Publication Number Publication Date
JPH10110836A JPH10110836A (en) 1998-04-28
JP3801278B2 true JP3801278B2 (en) 2006-07-26

Family

ID=17637204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28130396A Expired - Lifetime JP3801278B2 (en) 1996-10-03 1996-10-03 Spherical valve

Country Status (1)

Country Link
JP (1) JP3801278B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107654331A (en) * 2017-09-21 2018-02-02 浙江天美环境科技有限公司 Industrial wastewater generating equipment

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