JPS59155508A - Control valve for steam recovery - Google Patents
Control valve for steam recoveryInfo
- Publication number
- JPS59155508A JPS59155508A JP2899483A JP2899483A JPS59155508A JP S59155508 A JPS59155508 A JP S59155508A JP 2899483 A JP2899483 A JP 2899483A JP 2899483 A JP2899483 A JP 2899483A JP S59155508 A JPS59155508 A JP S59155508A
- Authority
- JP
- Japan
- Prior art keywords
- plug
- diameter portion
- valve seat
- reduced diameter
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は蒸、気タービン用のボイラー系に使用される蒸
気回収用調節弁に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a steam recovery control valve used in boiler systems for steam and gas turbines.
発電などに供されるタービンの翼車回転用高圧蒸気は、
ジェット噴流エネルギギ費消された後なお残留する熱を
供給蒸気の予熱に利用する。熱交換作用によりドレン化
した蒸気は再び蒸気化されてタービン翼の回転に供され
る。The high-pressure steam used to rotate the blade wheels of turbines used for power generation, etc.
The heat remaining after the jet energy has been dissipated is used to preheat the feed steam. The steam that has been turned into drains by the heat exchange action is vaporized again and used to rotate the turbine blades.
このように熱エネルギの有効利用が入かせｉいボイラ系
のサイクリソ２な過程の中で、ドレンの制御に用いられ
る調節弁内には、その縮流部においていわゆる「水あか
Ｊと称される酸化鉄が析出し、特に弁内ト、リム部品の
よどみ部分に付着してこれが弁の駆動を＃ｉる〆−いう
問題が存する。In this cyclical process of the boiler system, which allows effective use of thermal energy, the control valve used to control the drain contains oxidized water called "water scale" in the condensation section. There is a problem in that iron deposits and adheres particularly to the inside of the valve and the stagnation parts of the rim parts, which impairs the operation of the valve.
そこで従来においては、この調節弁として仕切弁あるい
は回転弁を用いた例などあるが、基本的゛には内弁の駆
動軌跡上にスクレーパを固設し、このスクレーパで内弁
の着座面の付着物を掻き取るという構造を採っていた。Conventionally, there are examples of using a gate valve or a rotary valve as this control valve, but basically a scraper is fixedly installed on the driving trajectory of the inner valve, and this scraper is used to scrape the seating surface of the inner valve. It had a structure in which the kimono was scraped off.
そして、このスクレーパ機能を長寿命化するためにスプ
リングを用いたり、スクレーパ自体を板ばねで形成した
夛する工夫が加えられている。In order to prolong the life of this scraper function, efforts have been made to use springs or to form the scraper itself with a leaf spring.
しかしながら、これらはいずれもスクレーパを。However, all of these require a scraper.
設けるという極めて初歩的な発想の域を脱せず、かえう
てスクレーパの減耗、破損、およびそのメンテナンスの
ための労を強いるという欠点があった。The idea of providing such a scraper is still very basic, and it has the disadvantage of causing wear and tear on the scraper, and requiring more effort for its maintenance.
本発明はこのような欠点を解消すべくなされたもので、
中間部に形成した着座部により大径部および小径部が区
別された円筒状プラグと、上記プラグの大径部を案内す
るよう本体に固定される円筒状の案内筒と、上記１才ｌ
の小径部が嵌合される段付き内孔を有した環状弁座とを
同一軸上に備え、上記プラグの小径部には該プラグの端
部よりＪＩｉｒ記着座部至近点に達するはソ同−幅員の
細長スリットが数条設けられ、このプラグを本体外部か
ら軸方向に往復駆動して上記スリットの開口面積を加減
することにより、流過流量を制御しうるようにした蒸気
回収用調節弁を提供するものである。The present invention has been made to solve these drawbacks.
A cylindrical plug having a large diameter portion and a small diameter portion separated by a seating portion formed in the intermediate portion, a cylindrical guide tube fixed to the main body so as to guide the large diameter portion of the plug, and the 1 year old l
An annular valve seat having a stepped inner hole into which the small diameter part of the plug is fitted is provided on the same axis, and the small diameter part of the plug has a solenoid valve seat that reaches the closest point to the JIir seating part from the end of the plug. - A steam recovery control valve with several wide slender slits, and the flow rate can be controlled by adjusting the opening area of the slits by reciprocating the plug in the axial direction from outside the main body. It provides:
以下、その構成等を図に示す実施例を用いて詳細に説明
する。Hereinafter, the configuration and the like will be explained in detail using an example shown in the drawings.
第１図は本発明に係る調節弁の開状態（右半部）と閉状
態（左手部）を示す縦断面図、第２図は要部の拡大図で
ある。これらの図において、符号１′で示すものは左方
に流入口１ａ’ｒ、下方に流出口１ｂを開口した本体を
示す。２はこの本体１内に螺着された弁座、４は案内筒
、５はこめ案内筒および弁座２内に摺動自在に嵌合する
プラグで、その上端部には弁軸６が螺着されている。７
は上記一部材を本体１内に装填後被冠される上蓋、８は
。FIG. 1 is a longitudinal sectional view showing the open state (right half) and closed state (left hand) of the control valve according to the present invention, and FIG. 2 is an enlarged view of the main parts. In these figures, the reference numeral 1' indicates a main body having an inlet 1a'r on the left side and an outlet 1b on the lower side. 2 is a valve seat screwed into the main body 1, 4 is a guide tube, 5 is a plug that is slidably fitted into the guide tube and the valve seat 2, and a valve shaft 6 is screwed into the upper end of the plug. It is worn. 7
Indicated by 8 is an upper lid that is covered after the above-mentioned parts are loaded into the main body 1.
シール部部材マ、ある。There is a seal member.
上記プラグ５は小体部５ａ と大径部５ｂからな上
る円筒状を呈し、さらに巌■には環状に突設された第２
の着座部５Ｃが形成されている。すなわち、上記小径部
５ａと大径部５ｂとの段差部には、構成されており、一
方案内筒４の下部内口縁には第２の着座部５ｃ が対接
する着座部４ａが形成されている。したがって、プラグ
５は案内筒４の内周面に環状突部が、ま友人径部５ｂは
開口縁部によって、さらに小径部５ａは弁座２によ、っ
て案内されて昇降する。The plug 5 has an ascending cylindrical shape consisting of a small body portion 5a and a large diameter portion 5b, and a second annular portion protruding from the rock.
A seating portion 5C is formed. That is, the step between the small diameter part 5a and the large diameter part 5b is formed with a seating part 4a on the inner edge of the lower part of the guide tube 4, which is in contact with the second seating part 5c. There is. Therefore, the plug 5 is guided by the annular protrusion on the inner circumferential surface of the guide tube 4, by the opening edge by the straddle diameter part 5b, and by the valve seat 2 by the small diameter part 5a to move up and down.
また、プラグ５には前記第１の着座部５ｄ付近に達する
複数のスリット１１が設けられており、このスリット１
１はその両側縁が略々平行になるように深さ方向に同一
の幅員をもっている。Further, the plug 5 is provided with a plurality of slits 11 reaching near the first seating portion 5d.
1 has the same width in the depth direction so that both side edges thereof are approximately parallel.
さらに、本発明においては弁座２の内孔を段付きに形成
したことを物欲としている。すなわち、弁座２には着座
部２ａを有する環状突起全内孔に有し、内孔の内周面２
ｂとプラグ５の小径部５ａとの間には間隙２が形成され
ている。Furthermore, in the present invention, the inner hole of the valve seat 2 is formed in a stepped manner. That is, the valve seat 2 has an annular projection having a seating portion 2a in the entire inner hole, and the inner circumferential surface 2 of the inner hole
A gap 2 is formed between the small diameter portion 5a of the plug 5 and the small diameter portion 5a of the plug 5.
以上述べたところから明らかなように、弁座２のプラグ
５に対する接触面は、弁座２の内孔小径部であり、他方
プラグ５の弁座摺接面は、スカート部のスリット１１を
除いた軸方向の垂下部に限られていて、いずれも幅狭い
部分が十字に交わるところで接融している。すなわち、
この交点が、弁座の内孔まわｐに最小面積で数点点在す
ることとなる。As is clear from the above, the contact surface of the valve seat 2 with the plug 5 is the small diameter inner hole of the valve seat 2, and the sliding contact surface of the valve seat of the plug 5, excluding the slit 11 in the skirt portion, is It is limited to the hanging part in the axial direction, and in both cases, the narrow parts are welded where they intersect in a cross shape. That is,
Several points of intersection are scattered around the inner hole p of the valve seat with a minimum area.
しかも上記接触面積は、プラグの移動によってもほとん
ど変化しない。Moreover, the contact area hardly changes even when the plug moves.
しかるに、一般に「水あか」が付着する部分といえば、
流体の縮流部の直下流域にあたる圧力が急激に回復する
ような壁部分、すなわち弁座の内孔であるが、この内孔
における１２グの接触点は移動することがなく、シかも
同じ接触面積で、これが変化することもない。したがっ
て、この点に「水あか」が付着する余地はなく、倒木付
着したとしても、小面積で接するプラグの駆動によって
特別のスクレーパを要す仝こ誤なく弁座２の環状突部の
下縁で掻色落とされるものである。ｊた、プラグの大径
部５ｂ周面に付着した付着物は案内筒４の下方開口縁で
掻き落される。However, when it comes to areas where "water scale" generally adheres,
This is the inner hole of the valve seat, which is the part of the wall where the pressure immediately downstream of the contraction part of the fluid rapidly recovers. This does not change with area. Therefore, there is no room for "water scale" to adhere to this point, and even if a fallen tree were to adhere to a fallen tree, the lower edge of the annular protrusion of the valve seat 2 can be easily removed without a special scraper being required due to the drive of the plug that contacts the small area. The color will be removed. Furthermore, the deposits adhering to the circumferential surface of the large diameter portion 5b of the plug are scraped off by the lower opening edge of the guide tube 4.
以上説明したように本発明によれば、プラグのスリット
を平行な側縁をもった切欠溝とし、このプラグの小径部
を弁座の小孔径部で摺動させるように構成したから、特
にスクレーパを設けることなくプラグ小径部に付着した
付着物を確実に除去することができる。またプラグ大径
部に付着し次付着物も案内筒下端開口縁部で除去される
という効果もある。As explained above, according to the present invention, the slit of the plug is a cutout groove with parallel side edges, and the small diameter part of the plug is configured to slide on the small diameter part of the valve seat. It is possible to reliably remove deposits adhering to the small diameter portion of the plug without providing a plug. Further, there is also the effect that the deposits that have adhered to the large diameter portion of the plug are removed at the lower opening edge of the guide tube.
第１図は本発明に係る調節弁の開状態と閉状態を示す縦
断面図、第２図は要部を示す拡大図である。
２・・・・弁座、４・・・・案内筒、°、５・・・・プ
ラグ、５ａ ・・・・小径部、５ｂ ・・・・大径
部、１１・・・・スリット。
特許出願人 中武バネウェル株式会社代理人 山川政
樹（ほか１名）
第２図FIG. 1 is a longitudinal sectional view showing the open and closed states of the control valve according to the present invention, and FIG. 2 is an enlarged view showing the main parts. 2...Valve seat, 4...Guide tube, °, 5...Plug, 5a...Small diameter section, 5b...Large diameter section, 11...Slit. Patent applicant Masaki Yamakawa (and one other person), agent for Chubu Springwell Co., Ltd. Figure 2
Claims (1)
別された円筒状プラグと、上記プラグの大径部を案内す
るよう本体に固定される円筒状の案内筒と、上記プラグ
の小径部が嵌合される段付き内孔を有した環状弁座とを
同一軸上に備え、１記ブ２グの小径部には該プラグの端
部より上記着座部至近点に達するはソ同−幅員の細長ス
リツートが複数膜けられ、このプラグを本体外部から軸
方向に往復駆動して上記スリットの開口面積を加減する
ことによジ、流過流量を制御しうるようにした蒸気回収
用ｔＵ９１帥弁。A cylindrical plug with a large diameter part and a small diameter part separated by a seating part formed in the middle part, a cylindrical guide tube fixed to the main body so as to guide the large diameter part of the plug, and a small diameter part of the plug. An annular valve seat having a stepped inner hole into which the plug is fitted is provided on the same axis, and the small diameter portion of the plug 2 has a so-called tU91 for steam recovery, in which a plurality of elongated slits with a width are cut out, and the flow rate can be controlled by adjusting the opening area of the slits by reciprocating the plug in the axial direction from the outside of the main body. Master dialect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2899483A JPS59155508A (en) | 1983-02-23 | 1983-02-23 | Control valve for steam recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2899483A JPS59155508A (en) | 1983-02-23 | 1983-02-23 | Control valve for steam recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59155508A true JPS59155508A (en) | 1984-09-04 |
Family
ID=12263962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2899483A Pending JPS59155508A (en) | 1983-02-23 | 1983-02-23 | Control valve for steam recovery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59155508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127681A (en) * | 1987-08-12 | 2000-10-03 | Olympus Optical Co., Ltd. | Scanning tunnel microscope |
| CN102102547A (en) * | 2011-01-28 | 2011-06-22 | 上海电气电站设备有限公司 | Protective device for piston rod of oscillating valve matched actuating mechanism |
-
1983
- 1983-02-23 JP JP2899483A patent/JPS59155508A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127681A (en) * | 1987-08-12 | 2000-10-03 | Olympus Optical Co., Ltd. | Scanning tunnel microscope |
| CN102102547A (en) * | 2011-01-28 | 2011-06-22 | 上海电气电站设备有限公司 | Protective device for piston rod of oscillating valve matched actuating mechanism |
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