JPH0960751A - Housing structure for high-temperature high-pressure fluid valve - Google Patents
Housing structure for high-temperature high-pressure fluid valveInfo
- Publication number
- JPH0960751A JPH0960751A JP21327195A JP21327195A JPH0960751A JP H0960751 A JPH0960751 A JP H0960751A JP 21327195 A JP21327195 A JP 21327195A JP 21327195 A JP21327195 A JP 21327195A JP H0960751 A JPH0960751 A JP H0960751A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve box
- expansion
- box
- outer 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.)
- Granted
Links
Landscapes
- Valve Housings (AREA)
- Lift Valve (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ガスタービンの
ガス流路などに介設される高温高圧流体用弁のハウジン
グ構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing structure for a high temperature and high pressure fluid valve provided in a gas passage of a gas turbine.
【０００２】[0002]
【従来の技術】弁（バルブ）Ｖは、図５に示すように、
流体、ガスなどの流路Ａに介設し、その弁箱１、２を流
路Ａの配管にボルト締めして取付け、弁軸３を回すこと
により、弁体４を実線のごとく弁座５に圧接して流路Ａ
を閉じ、弁体４を鎖線のごとく位置して流路Ａを開放す
るものである。2. Description of the Related Art A valve (valve) V, as shown in FIG.
The valve body 4 is installed in the flow path A for fluid, gas, etc., the valve boxes 1 and 2 are attached to the piping of the flow path A by bolting, and the valve shaft 3 is rotated, so that the valve body 4 is moved to the valve seat 5 as shown by the solid line. Pressed against the flow path A
Is closed and the valve body 4 is positioned as shown by a chain line to open the flow path A.
【０００３】このような弁Ｖを、例えば、ガスタービン
のガス流路Ａに介設すると、そのガス温度は８００℃前
後、ガス圧は１０ｋｇｆ／ｃｍ2 （０．９８ＭＰａ）程
度であるため、その高温により弁Ｖも高温となる。弁Ｖ
が高温になると、周辺機器への熱影響が問題になるとと
もに、作業者が弁Ｖに触れて火傷する恐れもある。When such a valve V is installed in, for example, the gas passage A of a gas turbine, the gas temperature is around 800 ° C. and the gas pressure is about 10 kgf / cm 2 (0.98 MPa). The valve V also becomes hot due to the high temperature. Valve V
When the temperature becomes high, there is a problem that the heat will affect the peripheral equipment, and the operator may touch the valve V and get burned.
【０００４】このため、このような高温ガス流路Ａに介
設する弁Ｖは、同図に示すように、円筒状の外弁箱１に
同じく円筒状の内弁箱２を所要の間隙６をもって同一軸
心で内装し、その内外弁箱１、２の間隙６内には断熱材
７を充填して、外弁箱１の内弁箱２からの断熱を図って
いるとともに、弁軸３内に冷却水を流して、弁Ｖ全体を
冷却（例えば外面温度で２００℃程度）するようにして
いる（実施例参照）。For this reason, the valve V provided in such a hot gas flow path A has a cylindrical inner valve box 2 and a cylindrical inner valve box 2 as shown in FIG. With the same axial center, and a gap 6 between the inner and outer valve casings 1 and 2 is filled with a heat insulating material 7 so as to insulate the outer valve casing 1 from the inner valve casing 2 and the valve stem 3 Cooling water is caused to flow inside to cool the entire valve V (for example, the outer surface temperature is about 200 ° C.) (see the embodiment).
【０００５】そして、このような高温高圧流体用弁Ｖに
おいては、実開平６−６８５０号公報などで示されるよ
うに、図５、図６のごとく、外弁箱１内面と内弁箱２の
外面にそれぞれフランジ１ａ、２ａを設け、この両フラ
ンジ１ａ、２ａをボルト・ナット８で締結し、外弁箱１
に対する内弁箱２の流れ方向（図５のａ矢印方向）の動
きを規制するようにしている。内弁箱２の熱膨張による
径方向の拡径は、フランジ２ａ内のボルト貫通孔２ｂが
径方向の長孔に形成され、この長孔２ｂの移動によって
吸収される。In such a high-temperature high-pressure fluid valve V, as shown in Japanese Utility Model Laid-Open No. 6-6850, the inner surface of the outer valve casing 1 and the inner valve casing 2 are, as shown in FIGS. The outer surface is provided with flanges 1a and 2a, respectively, and the both flanges 1a and 2a are fastened with bolts and nuts 8.
The movement of the inner valve box 2 in the flow direction (the direction of arrow a in FIG. 5) is restricted. The radial expansion due to the thermal expansion of the inner valve housing 2 is absorbed by the movement of the elongated hole 2b because the bolt through hole 2b in the flange 2a is formed as an elongated hole in the radial direction.
【０００６】[0006]
【発明が解決しようとする課題】この高温高圧流体用弁
Ｖにおいて、内弁箱２の弁軸貫通孔は、その壁面と弁軸
３の間に所要の隙間（実施例図２のクリアランスｔ参
照）を有しており、内弁箱２が流れ方向に熱膨張して
も、そのクリアランスｔによって、内弁箱２の貫通孔の
壁面が弁軸３に圧接しないようにして、弁体４の開閉操
作に支障がないようにしてある。In this valve V for high temperature and high pressure fluid, the valve shaft through hole of the inner valve casing 2 has a required clearance between the wall surface and the valve shaft 3 (see the clearance t in the embodiment FIG. 2). ), Even if the inner valve box 2 thermally expands in the flow direction, the clearance t prevents the wall surface of the through hole of the inner valve box 2 from being brought into pressure contact with the valve shaft 3, and The opening and closing operations are not disturbed.
【０００７】このため、そのクリアランスｔから高圧ガ
スが内外弁箱１、２の間隙６内に侵入することとなる。
このとき、弁Ｖが開放されたガス流通中は、弁Ｖの上流
側及び下流側はほぼ等圧のため、その侵入したガスは、
間隙６（断熱材７）内に留まることとなる。For this reason, the high pressure gas enters the gap 6 between the inner and outer valve casings 1 and 2 from the clearance t.
At this time, since the upstream side and the downstream side of the valve V are almost at equal pressure during the gas circulation with the valve V opened, the invaded gas is
It will remain in the gap 6 (the heat insulating material 7).
【０００８】一方、弁Ｖが閉じられると、弁Ｖの上流側
と下流側とでは、ほぼ１０ｋｇｆ／ｃｍ2 の差圧が生じ
ることとなり、その差圧により、ガスが前記クリアラン
スｔを通って激しく間隙６（断熱材７）内にリークし、
差圧は解消されることがないため、そのリークは、弁Ｖ
が開放されるか、又はガスの送り込みが停止されるまで
続くこととなる。このため、断熱材７は、そのリークし
たガスの風圧に晒されることとなり、劣化が急速に進む
とともに、変形、損傷する。また、ガス風圧により、断
熱材７が本来の位置から移動し、断熱材７の欠如した部
分が発生し、断熱効果の低下や不良を招く。断熱材７の
劣化などによる断熱効果の低下及び不良は、外弁箱１の
温度上昇を招き、周辺機器及び作業者への熱影響の問題
が生じる。On the other hand, when the valve V is closed, a pressure difference of about 10 kgf / cm 2 is generated between the upstream side and the downstream side of the valve V, and due to the pressure difference, the gas violently passes through the clearance t. Leak into the gap 6 (heat insulating material 7),
Since the differential pressure is not eliminated, the leak is caused by the valve V
Will be opened or the gas feed will be stopped. For this reason, the heat insulating material 7 is exposed to the wind pressure of the leaked gas, so that the heat insulating material 7 rapidly deteriorates and is deformed or damaged. Further, due to the gas wind pressure, the heat insulating material 7 moves from its original position, and a part where the heat insulating material 7 is lacking is generated, resulting in a decrease in heat insulating effect or a defect. The deterioration or failure of the heat insulating effect due to the deterioration of the heat insulating material 7 causes the temperature of the outer valve box 1 to rise, which causes a problem of thermal influence on peripheral devices and workers.
【０００９】なお、この種の高温高圧流体用弁Ｖは、全
閉時、弁体４と弁座５の圧接部からもガスのリークは生
じるが、このリークは下流側の流路Ａに流れるため、断
熱材７の効果劣化の面では問題とならない。When the valve V for high-temperature high-pressure fluid of this type is fully closed, gas leaks also from the pressure contact portion between the valve body 4 and the valve seat 5, but this leak flows into the flow passage A on the downstream side. Therefore, there is no problem in terms of the effect deterioration of the heat insulating material 7.
【００１０】この発明は、上記の実情の下、内弁箱の熱
膨張を吸収して、その熱膨張を外弁箱に影響を与えるこ
となく、断熱材の劣化を抑止し、断熱材の性能、効果を
長期的に維持するようにすることを課題とする。Under the above-mentioned circumstances, the present invention absorbs the thermal expansion of the inner valve box, suppresses the thermal expansion of the outer valve box and suppresses the deterioration of the heat insulating material, and the performance of the heat insulating material. , The challenge is to maintain the effect in the long term.
【００１１】[0011]
【課題を解決するための手段】上記の課題を解決するた
めに、請求項１記載の発明にあっては、上述した高温高
圧流体用弁Ｖにおいて、上記内外弁箱の間隙両開口を、
その筒軸方向かつ径方向に伸縮可能な膨張吸収機構によ
って密封した構成としたものである。In order to solve the above-mentioned problems, in the invention according to claim 1, in the above-mentioned high-temperature high-pressure fluid valve V, both gap openings of the inner and outer valve casings are
The structure is hermetically sealed by an expansion and absorption mechanism that can expand and contract in the cylinder axis direction and the radial direction.
【００１２】この膨張吸収機構によって、内弁箱が熱膨
張しても、その膨張はこの機構によって吸収され、外弁
箱に影響を与えない。また、断熱材は膨張吸収機構によ
って密封されているため、弁の全閉時、上記弁軸貫通孔
のクリアランスｔから流体が漏れ入っても（リークして
も）、流路内と同一圧になれば、それ以上の侵入はなく
なる。すなわち、断熱材内を流体が流通することはな
い。By this expansion absorption mechanism, even if the inner valve box thermally expands, the expansion is absorbed by this mechanism and does not affect the outer valve box. In addition, since the heat insulating material is sealed by the expansion absorbing mechanism, even if the fluid leaks (or leaks) from the clearance t of the valve shaft through hole when the valve is fully closed, the same pressure as in the flow path is obtained. Once that happens, there is no further intrusion. That is, the fluid does not flow through the heat insulating material.
【００１３】請求項２記載の発明は、請求項１記載の発
明において、その膨張吸収機構が、上記開口から内側に
向う上記同一軸心で円錐台筒状の内弁箱径方向に拡縮可
能な板ばねと、前記開口から内側に延びる前記同一軸心
の円筒状の内弁箱筒軸方向に伸縮可能な伸縮手段とから
なり、前記板ばねの小径端縁は内弁箱の外面に固定さ
れ、前記伸縮手段の外端縁は外弁箱の内面に固定され、
板ばねの大径端縁と伸縮手段の内端縁は連続して、その
連続縁が外弁箱内面に摺動自在に接している構成とした
ものである。According to a second aspect of the present invention, in the first aspect of the invention, the expansion / absorption mechanism is expandable / contractible in the radial direction of the inner valve case of the truncated cone tubular shape having the same axis centering inward from the opening. A leaf spring and an expanding / contracting means extending inward from the opening and having a cylindrical inner valve box of the same axis and capable of expanding and contracting in the axial direction of the cylinder, and the small-diameter edge of the leaf spring is fixed to the outer surface of the inner valve box. , The outer edge of the expansion and contraction means is fixed to the inner surface of the outer valve box,
The large-diameter edge of the leaf spring and the inner edge of the expansion / contraction means are continuous, and the continuous edge is slidably in contact with the inner surface of the outer valve box.
【００１４】請求項３記載の発明は、請求項１又は２記
載の発明において、上記内弁箱外面と外弁箱内面の間
に、内弁箱の径方向の伸縮を吸収し、内弁箱の筒軸方向
の移動を阻止する保持機構を設けた構成としたものであ
る。According to a third aspect of the present invention, in the invention according to the first or second aspect, the radial expansion and contraction of the inner valve box is absorbed between the outer surface of the inner valve box and the inner surface of the outer valve box, and the inner valve box is absorbed. The holding mechanism is provided to prevent the movement in the cylinder axis direction.
【００１５】請求項４記載の発明は、その保持機構が、
外弁箱の内周面又は内弁箱の外周面に、内外弁箱の筒軸
方向の間隔をあけて対のブラケットを設けるとともに、
内弁箱の外周面又は外弁箱の内周面に、前記対のブラケ
ット間に内外弁箱の径方向に摺動自在に嵌まる突起を設
けて成り、前記外弁箱のブラケット又は突起の内径面と
内弁箱の外周面との隙間、及び前記内弁箱の突起又はブ
ラケットの外径面と外弁箱の内周面との隙間は、内弁箱
の拡径に支障がないように設定し、かつ、保持機構は、
内外弁箱の周方向に少なくとも２個所設けた構成とした
ものである。According to a fourth aspect of the invention, the holding mechanism is
On the inner peripheral surface of the outer valve box or the outer peripheral surface of the inner valve box, a pair of brackets are provided with a space in the cylinder axis direction of the inner and outer valve boxes.
On the outer peripheral surface of the inner valve housing or the inner peripheral surface of the outer valve housing, a protrusion is provided between the pair of brackets so as to be slidably fitted in the radial direction of the inner and outer valve housing. The gap between the inner diameter surface and the outer peripheral surface of the inner valve housing, and the gap between the outer diameter surface of the protrusion or bracket of the inner valve housing and the inner peripheral surface of the outer valve housing should not hinder the expansion of the inner valve housing. And the retention mechanism is
At least two places are provided in the circumferential direction of the inner and outer valve boxes.
【００１６】上記保持機構は、上記膨張吸収機構では、
内弁箱の熱膨張などによる流れ方向の動きを阻止し得な
い場合、例えば、膨張吸収機構の抗力に対して、流体が
それ以上の高圧の場合に設けるものである。The holding mechanism in the expansion absorbing mechanism is
This is provided when the movement in the flow direction due to thermal expansion of the inner valve box cannot be prevented, for example, when the fluid has a higher pressure than the resistance of the expansion absorption mechanism.
【００１７】[0017]
【発明の実施の形態】この発明の一実施形態を図１乃至
図４に示し、円筒状の外弁箱１０に、同じく円筒状の内
弁箱２０が所要の間隙６０をもって同一軸心で内装され
ており、両弁箱１０、２０を弁軸３０が貫通している。
この弁軸３０に円盤状の弁体４０がスプライン結合され
ており、図３、図４実線のごとく弁体４０を流れ方向
（ａ矢印）に向かすことにより、開弁され、矢印のごと
く回転して、鎖線のごとく、内弁箱２０の弁座５０に弁
体４０の周縁を圧接することにより閉弁する。BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of the present invention is shown in FIGS. 1 to 4, in which a cylindrical outer valve casing 10 and a cylindrical inner valve casing 20 are internally provided with a required gap 60 and the same axial center. The valve shaft 30 passes through the valve boxes 10 and 20.
A disc-shaped valve body 40 is spline-coupled to the valve shaft 30, and the valve body 40 is opened by turning the valve body 40 in the flow direction (arrow a) as shown by the solid lines in FIGS. 3 and 4, and rotated as shown by the arrow. Then, as shown by the chain line, the valve seat 40 of the inner valve box 20 is pressed against the peripheral edge of the valve body 40 to close the valve.
【００１８】外弁箱１０は、そのフランジ１１でもっ
て、流路Ａの外配管Ａ１にガスケットを介在してボルト
締めにより連結され、内弁箱２０は、その端縁を流路Ａ
の内配管Ａ２の端縁に嵌め合わせにより連結される。こ
の嵌め合わせ部には流れ方向に間隙が形成されており、
この間隙によって、内弁箱２０及び内配管Ａ２の長さ方
向（流れ方向）の膨縮が相互に影響しない。内外配管Ａ
１、Ａ２間には断熱材が適宜に充填される。The outer valve casing 10 is connected by its flange 11 to the outer pipe A1 of the flow passage A by bolting with a gasket interposed therebetween, and the inner valve casing 20 has its end edge connected to the flow passage A.
Is connected to the edge of the inner pipe A2 by fitting. A gap is formed in the fitting direction in the flow direction,
Due to this gap, the expansion and contraction of the inner valve box 20 and the inner pipe A2 in the length direction (flow direction) do not affect each other. Inner and outer piping A
A heat insulating material is appropriately filled between 1 and A2.
【００１９】弁軸３０は、軸受１２、ブッシュ１３等に
よって両端を外弁箱１０に支持されている。その軸受１
２の外面開口はグランドパッキン１４、パッキン押え１
５などによってシールされており、弁軸３０を伝って流
体が外部に漏れないようになっている（リークしな
い）。また、図示していないが、軸受１２と外弁箱１０
間にも適宜なシールがなされて、外弁箱１０内から流体
（ガス、液体等）が漏れないようになっている。Both ends of the valve shaft 30 are supported by the outer valve casing 10 by bearings 12, bushes 13 and the like. Its bearing 1
The outer opening of 2 is gland packing 14, packing retainer 1
It is sealed by 5 or the like so that the fluid does not leak to the outside through the valve shaft 30 (it does not leak). Although not shown, the bearing 12 and the outer valve housing 10
Appropriate seals are also provided between them so that fluid (gas, liquid, etc.) does not leak from the inside of the outer valve box 10.
【００２０】軸受１２の内弁箱２０の貫通部は少しクリ
アランスｔが形成され、内弁箱２０が熱膨張しても、こ
のクリアランスｔにより、弁軸３０が圧接されることも
なく、円滑な開閉作用を行い得る。弁軸３０は中空とな
っており、この中空部に冷却水ｃが流通されて、弁Ｖを
冷却する。A small clearance t is formed in the penetrating portion of the inner valve housing 20 of the bearing 12, and even if the inner valve housing 20 thermally expands, the clearance t does not cause the valve shaft 30 to be pressed into contact with the inner wall of the inner valve housing 20 and is smooth. It can open and close. The valve shaft 30 is hollow, and cooling water c is circulated in the hollow portion to cool the valve V.
【００２１】内外弁箱１０、２０の間隙６０の筒軸方向
中程（弁軸３０と同一平面上）周囲に内弁箱２０の保持
機構が設けられており、この機構は、外弁箱１０の内面
周囲６等分位のブラケット１６、１６と内弁箱２０の外
面周囲６等分位のブラケット２３とから成り、前者のブ
ラケット１６、１６間の溝に後者のブラケット２３が嵌
まることにより、内弁箱２０の流れ方向の動きが阻止さ
れる。内弁箱２０側を溝、外弁箱１０側をその溝に嵌ま
る突起（ブラケット）とし得る。この両ブラケット１
６、２３の嵌合構造は、半円周に１ヶ所以上、等間隔に
設ける。A retaining mechanism for the inner valve casing 20 is provided around the middle of the gap 60 between the inner and outer valve casings 10, 20 in the cylinder axis direction (on the same plane as the valve shaft 30). Of the inner surface of the inner valve box 6 is divided into six brackets 16 and 16 and the outer periphery of the inner valve box 20 is divided into six brackets, and the latter bracket 23 is fitted in the groove between the former brackets 16 and 16. The movement of the inner valve box 20 in the flow direction is prevented. The inner valve box 20 side may be a groove and the outer valve box 10 side may be a protrusion (bracket) fitted in the groove. Both brackets 1
The fitting structures 6 and 23 are provided at one or more locations on the semicircle at equal intervals.
【００２２】内弁箱側ブラケット２３の適宜なものには
突片２４が設けられて、この突片２４の長孔２５に外弁
箱側ブラケット１６、１６を貫通したピン１７が嵌ま
り、内弁箱２０の周方向への移動を阻止している。この
ピン１７と長孔２５の嵌合は組み立て時の内外弁箱１
０、２０の位置決めの役目を果たす。また、内弁箱２０
が径方向に熱膨張すると、ブラケット２３がブラケット
１６、１６間を摺動するとともに、ピン１７も長孔２５
内を移動し、その膨張は外弁箱１０に伝わらない。な
お、突片２４と外弁箱１０内面、ブラケット１６と内弁
箱２０内面のそれぞれの間隔は、内弁箱２０の熱膨張に
よる拡径に支障がないように適宜に設定する。A projection piece 24 is provided on a suitable one of the inner valve box side bracket 23, and a pin 17 penetrating the outer valve box side bracket 16, 16 is fitted into a long hole 25 of the projection piece 24 so that The movement of the valve box 20 in the circumferential direction is prevented. The fitting between the pin 17 and the long hole 25 is performed by assembling the inner / outer valve box 1 at the time of assembly.
It serves to position 0, 20. Also, the inner valve box 20
When the heat expands in the radial direction, the bracket 23 slides between the brackets 16 and 16, and the pin 17 also moves into the long hole 25.
It moves inside and its expansion is not transmitted to the outer valve casing 10. The intervals between the protrusion 24 and the inner surface of the outer valve housing 10 and between the bracket 16 and the inner surface of the inner valve housing 20 are appropriately set so as not to hinder the expansion of the inner valve housing 20 due to thermal expansion.
【００２３】内外弁箱１０、２０の間隙６０の両開口部
に内弁箱２０の膨張吸収機構が設けられており、この両
機構間に、耐熱繊維などをマット状やネット状にした断
熱材７０が、膨張吸収機構及び前記保持機構の動作に支
障が生じないように充填されている。なお、断熱材とし
て、外弁箱１０内面に薄層の粒状等の断熱材をライニン
グしたキャスタブルとの組み合わせにすることもでき
る。An expansion and absorption mechanism for the inner valve box 20 is provided at both openings of the gap 60 between the inner and outer valve boxes 10 and 20, and a heat insulating material such as mat-like or net-like heat-resistant fiber is provided between these mechanisms. 70 is filled so as not to hinder the operation of the expansion absorbing mechanism and the holding mechanism. The heat insulating material may be a combination with a castable in which the inner surface of the outer valve box 10 is lined with a heat insulating material such as a thin layer of granular material.
【００２４】膨張吸収機構は、円錐台筒状の板ばね６１
と、円筒状のベロース６２とから成る。板ばね６１の小
径端縁６１ａ全周は内弁箱２０の外周全面に溶接され、
ベロース６２の外端縁６２ａ全周は外弁箱１０の内周全
面に溶接され、板ばね６１の大径端縁６１ｂとベロース
６２の内端縁６２ｂは全周に亘って溶接されており、こ
の板ばね６１とベロース６２によって間隙６０の開口が
閉塞される。この閉塞によって断熱材７０は外部から密
封状態となる。The expansion / absorption mechanism is a frustoconical cylindrical leaf spring 61.
And a cylindrical bellows 62. The entire circumference of the small-diameter edge 61a of the leaf spring 61 is welded to the entire outer circumference of the inner valve box 20,
The entire outer edge 62a of the bellows 62 is welded to the entire inner circumference of the outer valve box 10, and the large-diameter edge 61b of the leaf spring 61 and the inner edge 62b of the bellows 62 are welded over the entire circumference. The leaf spring 61 and the bellows 62 close the opening of the gap 60. Due to this blockage, the heat insulating material 70 is sealed from the outside.
【００２５】板ばね６１の大径端縁６１ｂは折り返され
て、外弁箱１０内面の周方向の突条１８に摺接してお
り、内弁箱２０が膨縮し、板ばね６１が拡縮径すると、
それに従って、その大径端縁６１ｂが突条１８を摺動し
てその動きに対応する。このとき、ベロース６２も流れ
方向（筒軸方向）に伸縮してその摺動に対応する。この
伸縮は同一芯軸で行われ、曲げ方向のたわみは生じにく
い。ベロース６２の襞には補強リング６３が嵌められて
おり、このリング６３によって、ベロース６２の内側
（筒軸側）への変形が阻止される。因みに、ベローズ６
２外側には、後述のリークした流体が板ばね６１と突条
１８の摺接部を通って流入する。The large-diameter edge 61b of the leaf spring 61 is folded back and is in sliding contact with the circumferential projection 18 on the inner surface of the outer valve casing 10, the inner valve casing 20 expands and contracts, and the leaf spring 61 expands and contracts. Then,
Accordingly, the large-diameter end edge 61b slides on the ridge 18 and responds to the movement. At this time, the bellows 62 also expands and contracts in the flow direction (cylinder axis direction) to correspond to the sliding. This expansion and contraction is performed with the same core shaft, and bending in the bending direction is unlikely to occur. A reinforcing ring 63 is fitted to the folds of the bellows 62, and the ring 63 prevents the bellows 62 from being deformed inward (toward the cylinder shaft). By the way, bellows 6
The leaked fluid, which will be described later, flows into the outside of the second passage 2 through the sliding contact portion between the leaf spring 61 and the protrusion 18.
【００２６】なお、板ばね６１、ベロース６２は耐熱、
耐ガス等の材料を使用することは勿論であり、図４に示
すように、板ばね６１は、小径端縁６１ａが内側となる
構成のものとし得ることができ、また、伸縮手段として
は、ベロース６２に代えて、軸方向のみ伸縮できるも
の、例えば、板ばね６１の大径端縁６１ｂに固定した筒
体と外弁箱１０に固定した筒体とをその筒軸方向に摺動
自在に嵌め、かつ、アスベストなどによって摺動面を気
密にした伸縮管とし得る。The leaf spring 61 and the bellows 62 are heat resistant,
It goes without saying that a material such as gas resistance is used, and as shown in FIG. 4, the leaf spring 61 can be configured such that the small-diameter end edge 61a is on the inner side, and the expansion / contraction means is Instead of the bellows 62, one that can be expanded and contracted only in the axial direction, for example, a cylindrical body fixed to the large-diameter end edge 61b of the leaf spring 61 and a cylindrical body fixed to the outer valve box 10 are slidable in the cylindrical axial direction. A telescopic tube which is fitted and whose sliding surface is made airtight by asbestos can be used.
【００２７】いま、閉弁状態において、弁軸３０（軸受
１２）と内弁箱２０のクリアランスｔから流体が図２矢
印のごとく間隙６０（断熱材７０）に侵入すると、その
流体は、断熱材７０内に充満すると、それ以上の侵入は
なくなる。このとき、開弁時においてもクリアランスｔ
からのリークは生じているため、その侵入は少なく、断
熱材７０内の流体流れは殆んど生じない。このため、断
熱材７０の移動等は生じず、劣化も進まない。Now, when the fluid enters the gap 60 (the heat insulating material 70) from the clearance t between the valve shaft 30 (the bearing 12) and the inner valve housing 20 in the valve closed state, as shown by the arrow in FIG. Once it fills 70, no further intrusions will occur. At this time, the clearance t is maintained even when the valve is opened.
Since there is a leak from the heat sink 70, the amount of the leak is small, and almost no fluid flow occurs in the heat insulating material 70. Therefore, the heat insulating material 70 does not move and the deterioration does not proceed.
【００２８】内弁箱２０が熱膨張すれば、弁軸３０に対
して対称となる両側の膨張吸収機構によってその膨張が
バランスよく吸収され、すなわち、径方向の拡径は板ば
ね６１によって、長さ方向（流れ方向）の伸びはベロー
ス６２によってそれぞれスムースに吸収され、内弁箱２
０が変形することもなく、その膨張が外弁箱１０に影響
を与えることもない。When the inner valve box 20 thermally expands, its expansion is absorbed in a well-balanced manner by the expansion and absorption mechanisms on both sides which are symmetrical with respect to the valve shaft 30, that is, the radial expansion is caused by the leaf spring 61. The expansion in the vertical direction (flow direction) is smoothly absorbed by the bellows 62, and the inner valve box 2
0 does not deform, and its expansion does not affect the outer valve housing 10.
【００２９】なお、前述の実施形態は、バタフライ弁で
あったが、ボール弁を含む回転弁にこの発明のハウジン
グ構造は採用し得ることは勿論である。Although the above-mentioned embodiment is a butterfly valve, it is a matter of course that the housing structure of the present invention can be applied to a rotary valve including a ball valve.
【００３０】[0030]
【発明の効果】この発明は以上のように構成したので、
内弁箱の熱膨張を吸収して、その熱膨張を外弁箱に影響
を与えることがなく、断熱材の劣化を抑制して、その性
能・効果を長期的に維持し得る。また、この断熱材にリ
ーク流体の影響が少ないことは、断熱材の種類や充填方
法の選定が広く行えることとなる。Since the present invention is constructed as described above,
The thermal expansion of the inner valve box is absorbed, the thermal expansion does not affect the outer valve box, the deterioration of the heat insulating material is suppressed, and its performance and effect can be maintained for a long time. In addition, the fact that the leakage fluid has little influence on the heat insulating material allows a wide selection of the heat insulating material and the filling method.
【００３１】また、外弁箱に内弁箱の熱膨張が影響しな
いことは、両弁箱相互の変形差異による両弁箱の変形や
損傷が発生しないこととなる。これは、結果として、弁
（弁軸）の操作がスムースとなり、前記変形や損傷に伴
う気密性能（弁座漏れ量）の低下も招きにくい。Further, the fact that the outer valve box is not affected by the thermal expansion of the inner valve box means that neither the two valve boxes are deformed nor damaged due to the deformation difference between the two valve boxes. As a result, the operation of the valve (valve shaft) becomes smooth, and the airtight performance (valve seat leakage amount) due to the deformation or damage is less likely to decrease.
【００３２】高圧時などには、保持機構を設けることに
より、膨張吸収機構への過大な負荷をなくすることがで
き、弁の使用条件に対応した弁選定ができる。By providing the holding mechanism at the time of high pressure, it is possible to eliminate an excessive load on the expansion and absorption mechanism, and it is possible to select a valve corresponding to the usage condition of the valve.
【図１】一実施形態の一部切欠き斜視図FIG. 1 is a partially cutaway perspective view of an embodiment.
【図２】同実施形態の切断側面図FIG. 2 is a cut side view of the same embodiment.
【図３】同実施形態の切断平面図FIG. 3 is a cutaway plan view of the same embodiment.
【図４】他の実施形態の切断平面図FIG. 4 is a cutaway plan view of another embodiment.
【図５】従来例の概略切断平面図FIG. 5 is a schematic sectional plan view of a conventional example.
【図６】同従来例の要部拡大図FIG. 6 is an enlarged view of a main part of the conventional example.
１、１０ 外弁箱 ２、２０ 内弁箱 ３、３０ 弁軸 ４、４０ 弁体 ５、５０ 弁座 ６、６０ 内外弁箱の間隙 ７、７０ 断熱材 １１ 外弁箱のフランジ １２ 軸受 １３ ブッシュ １４ グランドパッキン １５ パッキン押え １６ 外弁箱側ブラケット １７ ピン １８ 突条 ２３ 内弁箱側ブラケット ２４ 突片 ２５ 長孔 ６１ 板ばね ６１ａ 板ばね小径端縁 ６１ｂ 板ばね大径端縁 ６２ 伸縮手段（ベロース） ６２ａ 伸縮手段（ベロース）外端縁 ６２ｂ 伸縮手段（ベロース）内端縁 1, 10 Outer valve box 2, 20 Inner valve box 3, 30 Valve shaft 4, 40 Valve body 5, 50 Valve seat 6, 60 Gap between inner and outer valve boxes 7, 70 Insulation material 11 Outer valve box flange 12 Bearing 13 Bush 14 gland packing 15 packing retainer 16 outer valve box side bracket 17 pin 18 ridge 23 inner valve box side bracket 24 projecting piece 25 long hole 61 leaf spring 61a leaf spring small-diameter edge 61b leaf spring large-diameter edge 62 expansion means (bellows) ) 62a Expansion / contraction means (bellows) outer edge 62b Expansion / contraction means (bellose) inner edge
Claims (4)
０を所要の間隙６０をもって同一軸心で内装し、その内
外弁箱２０、１０の前記間隙６０内には断熱材７０を充
填し、内外弁箱２０、１０を貫通する弁軸３０に設けた
弁体４０により、前記内弁箱２０内の筒軸方向を開閉す
る高温高圧流体用弁であって、 上記内外弁箱２０、１０の間隙６０両開口を、その筒軸
方向かつ径方向に伸縮可能な膨張吸収機構によって密封
したことを特徴とする高温高圧流体用弁のハウジング構
造。1. A cylindrical inner valve box 2 is attached to a cylindrical outer valve box 10.
0 is internally installed with a required gap 60 at the same axis, and the gap 60 of the inner and outer valve casings 20 and 10 is filled with a heat insulating material 70, which is provided on the valve shaft 30 penetrating the inner and outer valve casings 20 and 10. A high-temperature high-pressure fluid valve that opens and closes a cylinder axis direction in the inner valve box 20 by a valve body 40, wherein both openings 60 of the gaps of the inner and outer valve boxes 20, 10 expand and contract in the cylinder axis direction and the radial direction. A housing structure for a valve for high-temperature high-pressure fluid, characterized by being sealed by a possible expansion and absorption mechanism.
ジング構造において、 上記膨張吸収機構が、前記開口から内側に向う上記同一
軸心で円錐台筒状の内弁箱径方向に拡縮可能な板ばね６
１と、前記開口から内側に延びる前記同一軸心の円筒状
の内弁箱筒軸方向に伸縮可能な伸縮手段６２とからな
り、前記板ばね６１の小径端縁６１ａは内弁箱２０の外
面に固定され、前記伸縮手段６２の外端縁６２ａは外弁
箱１０の内面に固定され、板ばね６１の大径端縁６１ｂ
と伸縮手段６２の内端縁６２ｂは連続して、その連続縁
が外弁箱１０内面に摺動自在に接していることを特徴と
するもの。2. The housing structure for a high temperature and high pressure fluid valve according to claim 1, wherein the expansion and absorption mechanism is expandable and contractable in a radial direction of a truncated cone-shaped inner valve box with the same axis centering inward from the opening. Leaf spring 6
1 and an expansion / contraction means 62 extending inward from the opening and having a cylindrical inner valve box of the same axis and capable of expanding and contracting in the axial direction of the cylinder. The small-diameter edge 61a of the leaf spring 61 is the outer surface of the inner valve box 20. The outer end edge 62a of the expansion / contraction means 62 is fixed to the inner surface of the outer valve box 10, and the large-diameter end edge 61b of the leaf spring 61 is fixed.
And the inner end edge 62b of the expansion / contraction means 62 is continuous, and the continuous edge slidably contacts the inner surface of the outer valve box 10.
のハウジング構造において、 上記内弁箱２０外面と外弁箱１０内面の間に、内弁箱２
０の径方向の伸縮を吸収し、内弁箱２０の筒軸方向の移
動を阻止する保持機構を設けたことを特徴とするもの。3. The housing structure for a valve for high temperature and high pressure fluid according to claim 1, wherein the inner valve box 2 is provided between the outer surface of the inner valve box 20 and the inner surface of the outer valve box 10.
A holding mechanism that absorbs the radial expansion and contraction of 0 and prevents the inner valve box 20 from moving in the cylinder axis direction is provided.
ジング構造において、 上記保持機構が、外弁箱１０の内周面又は内弁箱２０の
外周面に、内外弁箱２０、１０の筒軸方向の間隔をあけ
て対のブラケット１６、１６を設けるとともに、内弁箱
２０の外周面又は外弁箱１０の内周面に、前記対のブラ
ケット１６、１６間に内外弁箱２０、１０の径方向に摺
動自在に嵌まる突起２３を設けて成り、 上記外弁箱１０のブラケット１６又は突起の内径面と内
弁箱２０の外周面との隙間、及び前記内弁箱２０の突起
２３又はブラケットの外径面と外弁箱１０の内周面との
隙間は、内弁箱２０の拡径に支障がないように設定し、
かつ、保持機構は、内外弁箱２０、１０の周方向に少な
くとも２個所設けたことを特徴とするもの。4. The housing structure for a high-temperature high-pressure fluid valve according to claim 3, wherein the holding mechanism is provided on the inner peripheral surface of the outer valve casing 10 or the outer peripheral surface of the inner valve casing 20 so as to cover the inner and outer valve casings 20 and 10. The pair of brackets 16 and 16 are provided with a space in the cylinder axis direction, and the inner and outer valve casings 20 are provided between the pair of brackets 16 and 16 on the outer peripheral surface of the inner valve casing 20 or the inner peripheral surface of the outer valve casing 10. 10 is provided with a protrusion 23 that is slidably fitted in the radial direction, and a gap between the inner diameter surface of the bracket 16 or the protrusion of the outer valve box 10 and the outer peripheral surface of the inner valve box 20, and the inner valve box 20 The clearance between the outer diameter surface of the projection 23 or the bracket and the inner peripheral surface of the outer valve housing 10 is set so as not to hinder the diameter expansion of the inner valve housing 20.
Further, the holding mechanism is characterized in that it is provided at least at two positions in the circumferential direction of the inner and outer valve boxes 20, 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21327195A JP2852009B2 (en) | 1995-08-22 | 1995-08-22 | Housing structure of high temperature and high pressure fluid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21327195A JP2852009B2 (en) | 1995-08-22 | 1995-08-22 | Housing structure of high temperature and high pressure fluid valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0960751A true JPH0960751A (en) | 1997-03-04 |
| JP2852009B2 JP2852009B2 (en) | 1999-01-27 |
Family
ID=16636348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21327195A Expired - Fee Related JP2852009B2 (en) | 1995-08-22 | 1995-08-22 | Housing structure of high temperature and high pressure fluid valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2852009B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0960736A (en) * | 1995-08-24 | 1997-03-04 | Mitsubishi Heavy Ind Ltd | High temperature valve |
| CN102844598A (en) * | 2010-04-13 | 2012-12-26 | 株式会社巴技术研究所 | Valve element of butterfly valve |
| CN107289140A (en) * | 2017-07-10 | 2017-10-24 | 上海累富阀门科技有限公司 | 90 degree of revolution Bellows valves |
| JP2019049218A (en) * | 2017-09-08 | 2019-03-28 | 三菱日立パワーシステムズ株式会社 | Seal device of steam turbine and steam turbine having the seal device |
-
1995
- 1995-08-22 JP JP21327195A patent/JP2852009B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0960736A (en) * | 1995-08-24 | 1997-03-04 | Mitsubishi Heavy Ind Ltd | High temperature valve |
| CN102844598A (en) * | 2010-04-13 | 2012-12-26 | 株式会社巴技术研究所 | Valve element of butterfly valve |
| CN107289140A (en) * | 2017-07-10 | 2017-10-24 | 上海累富阀门科技有限公司 | 90 degree of revolution Bellows valves |
| JP2019049218A (en) * | 2017-09-08 | 2019-03-28 | 三菱日立パワーシステムズ株式会社 | Seal device of steam turbine and steam turbine having the seal device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2852009B2 (en) | 1999-01-27 |
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