JP3058912B2 - Steam control valve - Google Patents
Steam control valveInfo
- Publication number
- JP3058912B2 JP3058912B2 JP2299786A JP29978690A JP3058912B2 JP 3058912 B2 JP3058912 B2 JP 3058912B2 JP 2299786 A JP2299786 A JP 2299786A JP 29978690 A JP29978690 A JP 29978690A JP 3058912 B2 JP3058912 B2 JP 3058912B2
- Authority
- JP
- Japan
- Prior art keywords
- plug
- valve
- control valve
- steam control
- valve seat
- 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 - Fee Related
Links
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、蒸気加減弁に係り、特に大型蒸気加減弁の
プラグ及び弁座形状に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam control valve, and more particularly to a plug and a valve seat shape of a large steam control valve.
従来の技術 従来の大型蒸気加減弁の構造を、第４図（ａ），
（ｂ）に示す。Prior Art The structure of a conventional large steam control valve is shown in FIG.
(B).
これらの図において、大型蒸気加減弁は、駆動部１に
連結された弁棒２の先端側に設けられたプラグ３と、こ
のプラグ３に対向配置される弁体４の弁座５とを備えて
成り、開弁時は前記駆動部１の駆動力により弁棒２を介
してプラグ３を弁座５から離間する方向に引き上げ、か
つ閉弁時は戻しばね６の弾性力により前記プラグ３を弁
座５に当接させるようにしている。In these figures, the large steam control valve includes a plug 3 provided on the distal end side of a valve rod 2 connected to a drive unit 1, and a valve seat 5 of a valve body 4 arranged to face the plug 3. When the valve is opened, the plug 3 is pulled up from the valve seat 5 via the valve rod 2 by the driving force of the driving unit 1, and when the valve is closed, the plug 3 is pulled by the elastic force of the return spring 6. It comes into contact with the valve seat 5.
以上のような構成にあっては、蒸気管から流れてきた
蒸気７は、駆動部１、戻しばね６により作動されるプラ
グ３の位置により蒸気流量が決定されるようになってい
る。In the above configuration, the steam flow rate of the steam 7 flowing from the steam pipe is determined by the position of the plug 3 operated by the drive unit 1 and the return spring 6.
発明が解決しようとする課題 しかしながら、以上のような構成にあっては、プラグ
３が少し上昇する微開の状態では、該プラグ３が支持部
からの距離も長くかつ隙間流れとなるため、該プラグ３
を激しく振動させる現象が生じていた。However, in the above-described configuration, in a slightly opened state in which the plug 3 is slightly raised, the distance of the plug 3 from the support portion is long and a gap flows. Plug 3
Violently vibrated.
そして、大型蒸気加減弁は当然大型の物となり、小型
の蒸気加減弁に比較して強度が相対的に弱いものとな
る。したがって、該大型蒸気加減弁が微開のときの激し
い隙間流れにより、プラグ３が振動させられると、この
振動に起因して各部が損傷するという問題が生じてい
た。Then, the large steam control valve naturally becomes a large one, and the strength is relatively weak as compared with the small steam control valve. Therefore, when the plug 3 is vibrated by violent gap flow when the large steam control valve is slightly opened, there is a problem that each part is damaged due to the vibration.
本発明は、このような従来技術の課題を解決するため
になされたもので、微開時におけるプラグの振動を防止
できるようにした蒸気加減弁を提供することを目的とす
る。The present invention has been made to solve such a problem of the related art, and an object of the present invention is to provide a steam control valve capable of preventing vibration of a plug when the valve is slightly opened.
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、本発明は、プラグの後
端側に配置された駆動部及び戻しばねによりプラグを弁
体の弁座に対して接触、離間する方向に作動させて弁の
開閉動作を行うよう構成した蒸気加減弁において、前記
プラグの先端部とこれに対向する弁座のいずれか一方に
突出部を設け、かつ他方にこの突出部が噛合する噛合溝
を設けたものである。Means for Solving the Problems In order to solve the above problems, the present invention relates to a direction in which a plug is brought into contact with and separated from a valve seat of a valve body by a drive portion and a return spring arranged on a rear end side of the plug. In the steam control valve configured to open and close the valve by operating the valve, a protruding portion is provided at one of the tip portion of the plug and a valve seat opposed thereto, and the other portion is meshed with the protruding portion. A groove is provided.
作用 上記の手段によれば、プラグと弁座とが噛合できるよ
うになっているので、振動の振幅を取れなくすることが
でき、かつ振動してもプラグ、弁座間の互いの衝突によ
り振動減衰が得られるので、微開時の振動を抑制するこ
とが可能となる。According to the above-mentioned means, the plug and the valve seat can be engaged with each other, so that the amplitude of the vibration can not be obtained, and even if it vibrates, the vibration is attenuated by the collision between the plug and the valve seat. Is obtained, it is possible to suppress vibration at the time of slightly opening.
実施例 以下、図面を参照して本発明の実施例について詳細に
説明する。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明に係る蒸気加減弁の一実施例を示す一
部破断要部斜視図、第２図はプラグと弁座の分解斜視
図、第３図（ａ），（ｂ）はそれぞれ同蒸気加減弁の動
作説明図である。FIG. 1 is a partially cutaway perspective view showing an embodiment of a steam control valve according to the present invention, FIG. 2 is an exploded perspective view of a plug and a valve seat, and FIGS. 3 (a) and 3 (b) respectively. It is operation | movement explanatory drawing of the steam control valve.
本蒸気加減弁においても、図示は省略するが、プラグ
11の後端側に駆動部及び戻しばねが配設されており、該
駆動部及び戻しばねによりプラグ11を弁体12の弁座13に
対して接触、離間する方向に作動させて閉弁，開弁動作
を行うようにしている。そして、以上の点は第４図に示
した従来例の構成と同様である。The illustration of the steam control valve is omitted, but the plug
A drive unit and a return spring are disposed on the rear end side of the valve 11. The drive unit and the return spring actuate the plug 11 in a direction to contact and separate from the valve seat 13 of the valve body 12 to close the valve. The valve opening operation is performed. The above points are the same as the configuration of the conventional example shown in FIG.
さて、本実施例にあって、その特徴とするところは、
プラグ11の先端部に複数個の突出部14を設けると共に、
該プラグ11の先端部に対向する弁座13に前記突出部14が
噛合できるように形成された複数個の噛合溝15を設けた
点にある。By the way, in this embodiment, the feature is as follows.
While providing a plurality of protrusions 14 at the tip of the plug 11,
The point is that a plurality of engagement grooves 15 formed so that the protrusions 14 can be engaged with the valve seat 13 facing the distal end of the plug 11.
このような構成とすれば、プラグ11が微開の条件で
は、この突出部14と噛合溝15との噛合関係によりプラグ
11と弁座13は接触の状態にある。したがって、該プラグ
11が振動したとしても、振動振幅が取れないことから振
動が大きくなり得ず、かつプラグ11が弁座13に接触して
いることにより振動減衰が得られることになる。With such a configuration, under the condition that the plug 11 is slightly opened, the plug 11 is engaged by the engagement between the projection 14 and the engagement groove 15.
11 and the valve seat 13 are in contact with each other. Therefore, the plug
Even if 11 vibrates, the vibration cannot be increased because the vibration amplitude cannot be obtained, and the vibration is attenuated because the plug 11 is in contact with the valve seat 13.
第２図、第３図（ａ）はプラグ11の突出部14と弁座13
の噛合溝15とが噛合する前の状態を示しており、一方第
３図（ｂ）は前記突出部14と噛合溝15とが噛合した後の
状態を示している。2 and 3 (a) show the projection 14 of the plug 11 and the valve seat 13
3 (b) shows a state before the projecting portion 14 and the engaging groove 15 have engaged with each other.
蒸気加減弁においては、弁棒16の上昇、下降により蒸
気17の流量を決定しているが、下降時はプラグ11の突出
部14と弁座13の噛合溝15とは、第３図（ｂ）で示すよう
に、噛合状態を保っている。In the steam control valve, the flow rate of the steam 17 is determined by raising and lowering the valve rod 16, and at the time of lowering, the projecting portion 14 of the plug 11 and the engagement groove 15 of the valve seat 13 are in contact with each other as shown in FIG. ), The meshing state is maintained.
このように本実施例の構造にあっては、従来構造に対
し突出部14、噛合溝15を設けただけの構成であるため、
特別の組立方式や部品を必要とすることがない。As described above, in the structure of the present embodiment, since the protrusion 14 and the engagement groove 15 are merely provided in the conventional structure,
No special assembly method or parts are required.
なお、上述した実施例にあっては、プラグ11に突出部
14をかつ弁座13に噛合溝15を設けた構成としているが、
別にこれに限定されるものではなくプラグ側に噛合溝
を、かつ弁座側に突出部を設けた構成としてもよい。In the embodiment described above, the plug 11 has
14 and the valve seat 13 is provided with a meshing groove 15,
However, the present invention is not limited to this, and a configuration in which an engagement groove is provided on the plug side and a protrusion is provided on the valve seat side may be employed.
発明の効果 以上述べたように、本発明は、蒸気加減弁において、
プラグの先端部とこれに対向する弁座とのいずれか一方
に突出部を設け、かつ他方にこの突出部が噛合する噛合
溝を設けた構成としたことにより、プラグが微開の条件
ではこの突出部と噛合溝によりプラグと弁座が接触した
状態にあり、したがって該プラグが振動しても振動振幅
が取れないことから振動が大きくなり得ず、かつ振動し
たとしてもプラグ、弁座間の互いの衝突により振動減衰
が得られるので、微開時の振動を確実に防止することが
できるという優れた効果を奏する。Effect of the Invention As described above, the present invention relates to a steam control valve,
A protruding portion is provided on one of the distal end portion of the plug and the valve seat opposed thereto, and an engaging groove for engaging the protruding portion is provided on the other. The plug and the valve seat are in contact with each other due to the projection and the engagement groove. Therefore, even if the plug vibrates, the vibration amplitude cannot be obtained, so that the vibration cannot be increased. As a result, the vibration at the time of the slight opening can be reliably prevented, so that an excellent effect can be obtained.
第１図は本発明に係る蒸気加減弁の一実施例を示す一部
破断要部斜視図、第２図は同同蒸気加減弁に使用される
プラグと弁座との分解斜視図、第３図（ａ），（ｂ）は
それぞれ同蒸気加減弁の動作説明図、第４図（ａ）は従
来の蒸気加減弁の一例を示す断面図、第４図（ｂ）は同
図（ａ）の一部拡大断面図である。 11……プラグ、12……弁体、13……弁座、14……突出
部、15……噛合溝、16……弁棒、17……蒸気。FIG. 1 is a partially cutaway perspective view showing an embodiment of a steam control valve according to the present invention, FIG. 2 is an exploded perspective view of a plug and a valve seat used in the steam control valve, and FIG. 4 (a) and (b) are explanatory diagrams of the operation of the steam control valve, respectively. FIG. 4 (a) is a cross-sectional view showing an example of a conventional steam control valve, and FIG. 4 (b) is FIG. 3 is a partially enlarged cross-sectional view of FIG. 11 Plug, 12 Valve body, 13 Valve seat, 14 Projection, 15 Engagement groove, 16 Valve stem, 17 Steam.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−1808（ＪＰ，Ａ) 実開 昭64−41784（ＪＰ，Ｕ) 実開 平１−149082（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16K 47/02 F16K 1/34 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-1808 (JP, A) JP-A 64-41784 (JP, U) JP-A-1-149082 (JP, U) (58) Investigation Field (Int.Cl. 7 , DB name) F16K 47/02 F16K 1/34
Claims (1)
しばねによりプラグを弁体の弁座に対して接触、離間す
る方向に作動させて弁の開閉動作を行うよう構成した蒸
気加減弁において、前記プラグの先端部とこれに対向す
る弁座のいずれか一方に突出部を設け、かつ他方にこの
突出部が噛合する噛合溝を設けたことを特徴とする蒸気
加減弁。1. A steam which is configured to open and close a valve by operating a plug in a direction of coming into contact with and separating from a valve seat of a valve body by a driving portion and a return spring disposed on a rear end side of the plug. A steam control valve, wherein a protrusion is provided at one of a tip end portion of the plug and a valve seat facing the plug, and a mating groove is formed at the other end to engage the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2299786A JP3058912B2 (en) | 1990-11-07 | 1990-11-07 | Steam control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2299786A JP3058912B2 (en) | 1990-11-07 | 1990-11-07 | Steam control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04175586A JPH04175586A (en) | 1992-06-23 |
| JP3058912B2 true JP3058912B2 (en) | 2000-07-04 |
Family
ID=17876927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2299786A Expired - Fee Related JP3058912B2 (en) | 1990-11-07 | 1990-11-07 | Steam control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3058912B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7227845B2 (en) | 2019-05-14 | 2023-02-22 | 株式会社東芝 | Steam valve drive system, steam valve system and steam turbine plant |
-
1990
- 1990-11-07 JP JP2299786A patent/JP3058912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04175586A (en) | 1992-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |