JPH0552269A - Structure of valve body seat part - Google Patents
Structure of valve body seat partInfo
- Publication number
- JPH0552269A JPH0552269A JP21191291A JP21191291A JPH0552269A JP H0552269 A JPH0552269 A JP H0552269A JP 21191291 A JP21191291 A JP 21191291A JP 21191291 A JP21191291 A JP 21191291A JP H0552269 A JPH0552269 A JP H0552269A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve
- seat
- disc
- seat portion
- 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.)
- Pending
Links
Landscapes
- Lift Valve (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、弁体シート部の構造
に係り、特に発電所等の温度の高い流体または低温の流
体を採取またはフラッシングする場合に弁シート部に作
用する急激な熱応力を軽減させるよう構成した弁体シー
ト部の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a valve seat portion, and particularly to a rapid thermal stress acting on the valve seat portion when collecting or flushing a fluid having a high temperature or a fluid having a low temperature in a power plant or the like. The present invention relates to the structure of a valve body seat portion configured to reduce the above.
【0002】[0002]
【従来の技術】一般に、高温ならびに高圧の流体(例え
ば、500℃、300kgf/cm2)を取扱う弁とし
ては例えば図3の(a)に示すような接続形の弁が使用
されている。すなわち、この弁本体10は、上部弁体1
2の中央部に設けた突出部12aを下部弁体14の中央
部に設けた凹部14a内に嵌入し、両弁体12,14の
接合面を突合わせてその外周を溶接し一体的に構成され
ている。 2. Description of the Related Art Generally, as a valve for handling high-temperature and high-pressure fluid (for example, 500 ° C., 300 kgf / cm 2 ), a connection type valve as shown in FIG. 3A is used. That is, the valve body 10 is composed of the upper valve body 1
The protrusion 12a provided at the center of 2 is fitted in the recess 14a provided at the center of the lower valve body 14, the joint surfaces of both valve bodies 12 and 14 are butted, and the outer peripheries thereof are welded to be integrally formed. Has been done.
【0003】そして、ステム16はグランドパッキン1
8およびパッキンシート20を介して上部弁体12およ
びその突出部12a内に液密に挿通され、ステム16の
先端部に設けられるディスク22が下部弁体14に設け
られる弁シート24に着座するよう構成されている。The stem 16 is a gland packing 1.
8 and the packing seat 20 so as to be liquid-tightly inserted into the upper valve body 12 and its protrusion 12a so that the disc 22 provided at the tip of the stem 16 is seated on the valve seat 24 provided in the lower valve body 14. It is configured.
【0004】このような弁において、弁シート24は弁
構成の内で最も重要な部分であり、この弁シート24は
異物等による物理的な損傷等による洩れを極力防止する
ため、弁本体10に比較して硬質の材質をこの部分に盛
金24aを施して使用している。In such a valve, the valve seat 24 is the most important part of the valve structure, and the valve seat 24 is provided in the valve body 10 in order to prevent leakage due to physical damage due to foreign matter or the like as much as possible. In comparison, a hard material is used by applying a metal deposit 24a to this portion.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、弁シー
ト24の盛金24aは弁本体10との材質の相違による
線膨脹係数の差を有するため、熱応力および急激な加
熱、冷却の繰返しによる疲労(熱疲労)が主原因となり
盛金にクラック(シート割れ)が入る問題を有してい
た。すなわち、熱衝撃による盛金のシート割れは、先ず
バルブを開弁することにより急激な高温、高圧の負荷が
作用してそこに大きな熱応力が発生し、弁の開閉により
その負荷が繰返し作用する。これによる材料の大きなエ
ネルギーの消耗により短期間に急速な損傷が進行しこれ
がシート割れ発生の原因になると推定されている。However, since the heap metal 24a of the valve seat 24 has a difference in linear expansion coefficient due to the difference in material from the valve body 10, thermal stress and fatigue due to repeated rapid heating and cooling ( There is a problem that cracks (sheet breakage) occur in the deposit due to heat fatigue). That is, the seat crack of the metal deposit due to thermal shock is caused by a sudden high temperature and high pressure load when the valve is first opened and a large thermal stress is generated there, and the load is repeatedly acted upon by opening and closing the valve. .. It is presumed that a large amount of energy consumed by the material causes rapid damage in a short period of time, which causes sheet cracking.
【0006】このような盛金のシート割れ防止対策を講
じた弁の構造として、例えば図3の(b)に示すような
構成のものが提案されている。すなわち、盛金32aを
施した弁シート32の熱容量を少なくするため、これを
シート部材26とこれを押圧する押圧部材28の2つに
分離すると共にこの押圧部材28に多数のグランドパッ
キン30等を使用してシールを確実にしている。しかし
ながら、このような弁構造は、分離構造を採っているた
め部品点数が多くなり構成が複雑で分解・組立作業に多
くの時間を費やしてメンテナンスが困難となり、これが
製造原価を上昇させる要因となっていた。[0006] As a structure of a valve having such a measure for preventing sheet breakage of a heap metal, for example, a structure as shown in Fig. 3B has been proposed. That is, in order to reduce the heat capacity of the valve seat 32 provided with the heap metal 32a, it is separated into the seat member 26 and the pressing member 28 for pressing the seat member 26, and a large number of gland packings 30 and the like are attached to the pressing member 28. Use to ensure the seal. However, since such a valve structure has a separated structure, the number of parts is large, the structure is complicated, and much time is required for disassembling and assembling work, which makes maintenance difficult, which causes a rise in manufacturing cost. Was there.
【0007】そこで、本発明の目的は、高温、高圧また
は低温の流体を取扱う弁のシート部に弁体の材質より硬
質の盛金を施すと共にこのシート部盛金の外周に環状溝
を形成することにより、シート部における熱応力の軽減
を図ると共にその構成が単純で分解・組立作業工数を大
幅に削減することのできる弁体シート部の構造を提供す
るにある。Therefore, an object of the present invention is to apply a metal harder than the material of the valve body to a seat portion of a valve that handles high-temperature, high-pressure or low-temperature fluid, and form an annular groove on the outer periphery of the seat portion metal. Thus, the structure of the valve body seat portion is provided, which is capable of reducing the thermal stress in the seat portion and has a simple structure and can significantly reduce the number of disassembling / assembling work steps.
【0008】[0008]
【課題を解決するための手段】前記の目的を達成するた
め、高温または低温の流体を取扱う弁において、弁の流
体流出入口を開閉すべく弁体内に軸方向に摺動可能にデ
ィスクを挿嵌し、このディスクの先端に対接してこれと
同一軸線上に設けられたシート部の流体流入口周縁に前
記弁体の材質より硬質の盛金を施すと共にこの弁シート
の盛金外周に環状溝を形成することを特徴とする。In order to achieve the above object, in a valve handling a high or low temperature fluid, a disc is slidably inserted in the valve body in an axial direction so as to open / close a fluid outlet / inlet of the valve. Then, a helix that is harder than the material of the valve body is applied to the periphery of the fluid inlet of the seat portion that is provided on the same axis as the tip of this disc, and an annular groove is formed around the helix of this valve seat. Is formed.
【0009】この場合、前記弁体は、上部弁体と下部弁
体とを相互に溶接接合し、下部弁体接続部の当接面に凹
部を形成してこれに流体流入口を連通し、前記上部弁体
接続部の当接面に凸部を形成してこれと同一軸線上にデ
ィスクを摺動可能に挿嵌するように構成すれば好適であ
る。In this case, in the valve body, the upper valve body and the lower valve body are welded to each other and a recess is formed in the abutting surface of the lower valve body connecting portion, and the fluid inlet is communicated with the recess. It is preferable that a convex portion is formed on the contact surface of the upper valve body connecting portion and the disc is slidably fitted on the same axis as the convex portion.
【0010】さらに、前記環状溝は、断面形状をU字型
またはV字型に形成すれば好適である。Further, it is preferable that the annular groove has a U-shaped or V-shaped cross section.
【0011】[0011]
【作用】本発明に係る弁体シート部の構造によれば、弁
の流体流出入口を開閉すべく弁体内に軸方向に摺動可能
にディスクを挿嵌し、このディスクの先端に対接してこ
れと同一軸線上に設けられたシート部の流体流入口周縁
に前記弁体の材質より硬質の盛金を施すと共にこの弁シ
ートの盛金外周に環状溝を形成することにより、シート
部における熱応力の軽減を図ると共にその構成が単純で
分解・組立作業工数を大幅に削減することができる。According to the structure of the valve seat portion according to the present invention, the disc is slidably inserted in the valve body in the axial direction so as to open and close the fluid outlet / inlet of the valve, and is brought into contact with the tip of the disc. By applying a metal harder than the material of the valve body to the periphery of the fluid inlet of the seat provided on the same axis as this and forming an annular groove on the outer circumference of the metal of the valve seat, In addition to reducing stress, the structure is simple and the disassembling and assembling work can be significantly reduced.
【0012】[0012]
【実施例】次に本発明に係る弁体シート部の構造の実施
例につき、添付図面を参照しながら以下詳細に説明す
る。なお、説明の便宜上図3に示す構成と同一部分につ
いては同一参照符号を付し、その詳細な説明を省略す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the structure of a valve body seat portion according to the present invention will be described below in detail with reference to the accompanying drawings. For the sake of convenience of explanation, the same components as those shown in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.
【0013】図1の(a)は本発明に係る弁体シート部
の構造の一実施例を示し、図1の(b)は他の実施例を
示す要部断面図であり、図2は本発明に係る弁シート部
と従来の弁シート部との比較説明図である。FIG. 1A shows an embodiment of the structure of the valve body seat portion according to the present invention, FIG. 1B is a sectional view of the essential parts showing another embodiment, and FIG. It is a comparison explanatory view of the valve seat part which concerns on this invention, and the conventional valve seat part.
【0014】図において、参照符号34は高温、高圧ま
たは低温の流体を取扱う弁の流体流入口を示し、この流
体流入口34より流入した流体は弁の繰返し開弁により
弁体内部を通過して流体流出口36より断続的に流出さ
れる。In the figure, reference numeral 34 indicates a fluid inlet of a valve that handles high-temperature, high-pressure or low-temperature fluid, and the fluid introduced from this fluid inlet 34 passes through the inside of the valve body by repeated opening of the valve. It is intermittently discharged from the fluid outlet 36.
【0015】この流体流入口34は下部弁体14の側面
より水平方向に穿設された流入口34aに連通すべく下
部弁体14の垂直な中心軸線上に穿設された流入口34
bに連通し、流入口34bはシート部40と連通してこ
れと同一軸線上にある上部弁体12の突出部12a内に
液密に挿通されたディスク22の先端が流入口34b周
縁の弁シート24に対接し、このディスク22の先端が
弁シート24に繰返し着座した際にこの弁シート部が異
物等による物理的な損傷等による洩れを極力防止するた
め、この弁シート24に弁体10の材質より硬質の材質
により盛金24aを施してある。そして、図1の(a)
に示すように盛金24a外周の弁シート部40に断面U
字形の環状溝38または図1の(b)に示すを断面V字
形の環状溝42を形成する。The fluid inlet 34 is formed on the vertical central axis of the lower valve body 14 so as to communicate with the inlet 34a formed in the horizontal direction from the side surface of the lower valve body 14.
b, the inflow port 34b communicates with the seat part 40, and the tip of the disk 22 liquid-tightly inserted into the protruding part 12a of the upper valve body 12 on the same axis as the valve part is located at the periphery of the inflow port 34b. When the tip of the disc 22 is repeatedly seated on the valve seat 24 in contact with the seat 24, the valve seat portion is prevented from leaking to the valve seat 24 as much as possible due to physical damage or the like due to physical damage. The deposit 24a is made of a material harder than the above material. Then, in FIG.
As shown in FIG.
The V-shaped annular groove 38 or the V-shaped annular groove 42 shown in FIG. 1B is formed.
【0016】次に図2を基に、この弁シート部の構造を
従来の弁シート部の構造と比較説明する。すなわち、図
2の(a)は従来のシート部の中心より片側の断面図を
示し、図2の(b)は本発明のシート部の片断面図を示
す。図2に示す(a)および(b)において、弁シート
盛金の内・外の半径r1,r2並びに弁シート24を形
成する下部弁体14の中央部に設けたシート部40底面
の内側半径Rはそれぞれ同一であり、図2の(a)では
この半径Rのシート部底面の弁シート24の盛金24a
外周に幅R−r3のU字形円環溝38を形成する。Next, the structure of the valve seat portion will be described in comparison with the structure of the conventional valve seat portion with reference to FIG. That is, (a) of FIG. 2 shows a cross-sectional view on one side from the center of the conventional seat portion, and (b) of FIG. 2 shows a half-sectional view of the seat portion of the present invention. In FIGS. 2A and 2B, the inner and outer radii r 1 and r 2 of the valve seat helix and the bottom surface of the seat portion 40 provided at the center of the lower valve body 14 forming the valve seat 24 The inner radii R are the same, and in FIG. 2 (a), the metal deposit 24a of the valve seat 24 on the bottom surface of the seat of this radius R is
A U-shaped annular groove 38 having a width R-r 3 is formed on the outer circumference.
【0017】このように、断面U字形の環状溝38を形
成することによりシート部40の熱容量を小さくし、熱
応力および急激な加熱、冷却の繰返しによる疲労(熱疲
労)を少なくして熱衝撃を柔らげ、盛金24aのシート
割れを防止することができる。このように構成すること
により、高温または低温の流体が弁内に流入すると弁本
体の大きさに比例して盛金部と弁本体との線膨脹係数差
による引張りまたは圧縮応力が急激に繰返し作用する
が、盛金外周のシート部に環状溝を形成することによ
り、盛金部に係る熱応力を大幅に軽減させることができ
る。By forming the annular groove 38 having a U-shaped cross section in this manner, the heat capacity of the seat portion 40 is reduced, and thermal stress and fatigue due to repeated rapid heating and cooling (thermal fatigue) are reduced to reduce thermal shock. Can be softened and the cracking of the sheet of the heap metal 24a can be prevented. With this structure, when a high-temperature or low-temperature fluid flows into the valve, the tensile or compressive stress due to the difference in the linear expansion coefficient between the metal plate and the valve body rapidly repeats in proportion to the size of the valve body. However, by forming the annular groove in the sheet portion on the outer periphery of the metal deposit, it is possible to significantly reduce the thermal stress related to the metal deposit.
【0018】[0018]
【発明の効果】前述した実施例から明らかなように、本
発明の弁体シート部の構造によれば、弁の流体流出入口
を開閉すべく弁体内に軸方向に摺動可能にディスクを挿
嵌し、このディスクの先端に対接してこれと同一軸線上
に設けられたシート部の流体流入口周縁に前記弁体の材
質より硬質の盛金を施すと共にこの弁シートの盛金外周
に環状溝を形成することにより、シート部における熱応
力の軽減を図ると共にその構成が単純で分解・組立作業
工数を大幅に削減し、メンテナンスが容易になると共に
製造原価の低廉化を実現することができる等の優れた効
果を有する。As is apparent from the above-described embodiments, according to the structure of the valve body seat portion of the present invention, the disc is axially slidably inserted into the valve body to open and close the fluid outlet / inlet of the valve. The valve seat is placed in contact with the front end of the disc and is provided on the same axis as the fluid inlet port of the seat. By forming the groove, it is possible to reduce the thermal stress in the seat part, and the structure is simple so that the disassembling and assembling man-hours can be greatly reduced, the maintenance can be facilitated and the manufacturing cost can be reduced. And so on.
【0019】以上、本発明の好適な実施例について説明
したが、本発明の弁体シート部の構造は、例えば、環状
溝は断面UまたはV字形状について説明したがこの形状
に限定されるものではなく、本発明の精神を逸脱しない
範囲内において種々の設計変更をなし得ることは勿論で
ある。While the preferred embodiment of the present invention has been described above, the structure of the valve body seat portion of the present invention has been described, for example, as the annular groove having a U-shaped or V-shaped cross section, but is not limited to this shape. Of course, various design changes can be made without departing from the spirit of the present invention.
【図1】図に示す(a)は本発明に係る弁体シート部の
一実施例を示し、弁体シート部の要部断面図であり、図
に示す(b)は本発明に係る弁体シート部の他の実施例
を示し、弁シート部の要部断面図である。FIG. 1A is a sectional view of an essential part of a valve body seat portion according to an embodiment of the present invention, and FIG. 1B is a valve according to the present invention. FIG. 11 is a cross-sectional view of a main part of the valve seat portion, showing another embodiment of the body seat portion.
【図2】本発明の弁体シート部の構造と従来の弁体シー
ト部の構造の比較説明図であり、図に示す(a)は従来
の弁体シート部の説明図であり、図に示す(b)は本発
明の弁体シート部の説明図である。FIG. 2 is a comparative explanatory view of the structure of the valve body seat portion of the present invention and the structure of the conventional valve body seat portion, and FIG. 2 (a) is an explanatory view of the conventional valve body seat portion. (B) is an explanatory view of the valve body seat portion of the present invention.
【図3】弁体シート部に弁体の材質より硬質の盛金を施
した従来の弁構造を示す要部断面図である。FIG. 3 is a cross-sectional view of essential parts showing a conventional valve structure in which a valve body seat is covered with a metal harder than the material of the valve body.
10 弁本体 12 上部弁体 14 下部弁体 16 ステム 18,30 グランドパッキン 20 パッキンシ
ート 22 ディスク 24,32 弁シ
ート 24a,32a 盛金 26 シート部材 28 押圧部材 34,34a,3
4b 流体流入口 36 流体流出口 38 U字形環状
溝 40 シート部 42 V字形環状
溝10 valve body 12 upper valve body 14 lower valve body 16 stem 18,30 gland packing 20 packing sheet 22 disc 24,32 valve seat 24a, 32a deposit 26 sheet member 28 pressing member 34, 34a, 3
4b Fluid inlet 36 Fluid outlet 38 U-shaped annular groove 40 Seat portion 42 V-shaped annular groove
Claims (3)
て、 弁の流体流出入口を開閉すべく弁体内に軸方向に摺動可
能にディスクを挿嵌し、このディスクの先端に対接して
これと同一軸線上に設けられたシート部の流体流入口周
縁に前記弁体の材質より硬質の盛金を施すと共にこの弁
シートの盛金外周に環状溝を形成することを特徴とする
弁体シート部の構造。1. In a valve for handling a high or low temperature fluid, a disc is slidably inserted in the valve body in an axial direction so as to open and close a fluid outflow port of the valve, and the disc is brought into contact with the tip of the disc. A valve body seat portion characterized by forming a metal harder than the material of the valve body on the periphery of the fluid inlet of the seat portion provided on the same axis and forming an annular groove on the outer periphery of the metal of the valve seat. Structure.
に溶接接合し、下部弁体接続部の当接面に凹部を形成し
てこれに流体流入口を連通し、前記上部弁体接続部の当
接面に凸部を形成してこれと同一軸線上にディスクを摺
動可能に挿嵌してなる請求項1記載の弁体シート部の構
造。2. The valve body, wherein an upper valve body and a lower valve body are welded to each other, a recess is formed in an abutting surface of a lower valve body connecting portion, and a fluid inlet is communicated with the recess. 2. The structure of the valve body seat portion according to claim 1, wherein a convex portion is formed on the contact surface of the upper valve body connecting portion, and the disc is slidably fitted on the same axis as the convex portion.
字型に形成してなる請求項1記載の弁体シート部の構
造。3. The annular groove has a U-shaped or V-shaped cross section.
The structure of the valve body seat part according to claim 1, which is formed in a V shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21191291A JPH0552269A (en) | 1991-08-23 | 1991-08-23 | Structure of valve body seat part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21191291A JPH0552269A (en) | 1991-08-23 | 1991-08-23 | Structure of valve body seat part |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0552269A true JPH0552269A (en) | 1993-03-02 |
Family
ID=16613718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21191291A Pending JPH0552269A (en) | 1991-08-23 | 1991-08-23 | Structure of valve body seat part |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0552269A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1262697A1 (en) * | 2001-05-30 | 2002-12-04 | Techspace Aero S.A. | Valve for cryogenic liquids |
DE102010016845A1 (en) * | 2010-05-07 | 2011-11-10 | Samson Ag | Process valve with flexible sealing edge |
KR20160053697A (en) | 2014-11-05 | 2016-05-13 | 산수 주식회사 | Manual type water pump |
-
1991
- 1991-08-23 JP JP21191291A patent/JPH0552269A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1262697A1 (en) * | 2001-05-30 | 2002-12-04 | Techspace Aero S.A. | Valve for cryogenic liquids |
DE102010016845A1 (en) * | 2010-05-07 | 2011-11-10 | Samson Ag | Process valve with flexible sealing edge |
KR20160053697A (en) | 2014-11-05 | 2016-05-13 | 산수 주식회사 | Manual type water pump |
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