JP2529583B2 - Low temperature valve - Google Patents
Low temperature valveInfo
- Publication number
- JP2529583B2 JP2529583B2 JP62278632A JP27863287A JP2529583B2 JP 2529583 B2 JP2529583 B2 JP 2529583B2 JP 62278632 A JP62278632 A JP 62278632A JP 27863287 A JP27863287 A JP 27863287A JP 2529583 B2 JP2529583 B2 JP 2529583B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- low
- temperature
- low temperature
- driving
- 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
Links
Landscapes
- Flow Control (AREA)
- Fluid-Driven Valves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、空気液化分離装置や一般の深冷装置内の低
温流体の流量を制御する低温弁に関するものである。The present invention relates to a cryogenic valve for controlling the flow rate of a cryogenic fluid in an air liquefaction / separation device or a general refrigeration system.
空気液化分離装置のコールドボックス内等に設けら
れ、液化窒素や液化酸素等の液化ガスあるいは液化点近
くまで冷却されたガスの流量を調整する従来の低温弁
は、弁体部をコールドボックス等の低温室内に配設し、
駆動部を外部の常温部に配置して両者を延長軸により連
結して弁の開閉を行っていた。A conventional cryogenic valve that is provided in the cold box of an air liquefaction separation device and that regulates the flow rate of liquefied gas such as liquefied nitrogen or liquefied oxygen or the gas cooled to near the liquefaction point has a valve body such as a cold box. It is placed in a low temperature room,
The drive unit was placed outside the room temperature part, and both were connected by an extension shaft to open and close the valve.
そのため低温弁の設置位置に制限を受けたり、延長軸
を通しての熱損失が発生したり、さらに低温弁近傍の各
部分の熱膨張・収縮を考慮するために配管工事等が繁雑
化していた。そこで本出願人は、さきに低温流体用制御
弁装置として弁体部と駆動部とを一体化して低温室内に
配設できるようにした低温弁を開発した（実開昭56−95
667号参照）。Therefore, the installation position of the low temperature valve is restricted, heat loss occurs through the extension shaft, and piping work and the like are complicated to consider thermal expansion and contraction of each part near the low temperature valve. Therefore, the applicant of the present invention has previously developed a low-temperature valve as a low-temperature fluid control valve device in which a valve body portion and a drive portion are integrated so that they can be arranged in a low-temperature chamber.
See No. 667).
しかしながら、上述のものでは、駆動用低温ガスの調
整器や熱交換器を、低温弁とは別に配設しているため、
低温弁付近の配管が複雑になることがあり、また配管の
長さによっては、駆動部の作動にタイムラグを生じる虞
もあった。However, in the above-described one, since the driving low-temperature gas regulator and the heat exchanger are arranged separately from the low-temperature valve,
The piping in the vicinity of the low temperature valve may be complicated, and depending on the length of the piping, there may be a time lag in the operation of the drive unit.
そこで、本発明は、よりコンパクトで、かつ作動性の
良好な低温弁を提供することを目的としている。Therefore, an object of the present invention is to provide a low temperature valve which is more compact and has good operability.
上記した目的を達成するために本発明は、深冷装置の
コールドボックス等の低温室内に配設して、低温下で作
動して低温流体の流量を制御する低温弁において、弁体
部と、該弁体部の開閉を、前記低温流体と略同温でかつ
低温弁を駆動開閉できる圧力下で液化しない組成の駆動
用低温ガスにより行う駆動部と、前記弁体部の開度を検
出するポジショナを備えた制御部とを一体的に構成し、
該ポジショナと前記駆動部の加圧室とを駆動用低温ガス
給排用の加圧配管で連通するともに、前記制御部は、ポ
ジショナにより検出された弁体部の開度と設定値とを比
較して前記駆動用低温ガスの圧力を制御するものである
ことを特徴とする。In order to achieve the above-mentioned object, the present invention is arranged in a low temperature chamber such as a cold box of a deep-cooling device, in a low temperature valve that operates at low temperature to control the flow rate of a low temperature fluid, a valve body portion, A drive unit that opens and closes the valve body with a low-temperature driving gas having a composition that does not liquefy under a pressure that is substantially the same temperature as the low-temperature fluid and that can drive and open the low-temperature valve, and the opening degree of the valve body is detected. A control unit equipped with a positioner is integrally configured,
The positioner and the pressurizing chamber of the drive unit are connected by a pressurizing pipe for supplying and discharging low-temperature gas for driving, and the control unit compares the opening degree of the valve body unit detected by the positioner with a set value. Then, the pressure of the driving low temperature gas is controlled.
従って、弁体部と駆動部及び弁体部の開閉を制御する
制御部とが一体化し、低温弁をコンパクトに纏めること
ができ、また制御部と駆動部が近接しているため、応答
性を向上させることができる。Therefore, the valve body portion and the drive portion and the control portion for controlling the opening and closing of the valve body portion are integrated with each other, and the low temperature valve can be compactly integrated. Further, since the control portion and the drive portion are close to each other, the responsiveness is improved. Can be improved.
以下、本発明の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
低温弁１は、深冷装置のコールドボックス等の低温室
内に配設して、低温下で作動して低温流体の流量を制御
するもので、弁体部２と駆動部３及び制御部４とを一体
的に構成してなり、各部と低温弁１の外部側とは気密に
形成されている。The low-temperature valve 1 is disposed in a low-temperature chamber such as a cold box of a deep-cooling device and operates at a low temperature to control the flow rate of low-temperature fluid. The low-temperature valve 1 includes a valve body 2, a drive unit 3, and a control unit 4. Are integrally configured, and each part and the outside of the low temperature valve 1 are formed airtight.
弁体部２は、低温流体の流入口５と流出口６が形成さ
れた弁箱７と、流入口５の内端縁に設けられた弁座８及
び該弁座８に離接する弁子９とで構成されており、弁子
９には、前記駆動部３と接続される弁棒10が取付けられ
ている。また弁棒10の周囲には、該弁棒10を摺動可能に
支持するプッシュ11の部分等からの低温流体の漏洩を防
止するためにシール用ベローズ12が設けられている。The valve body 2 includes a valve box 7 having an inflow port 5 and an outflow port 6 for a low temperature fluid, a valve seat 8 provided at an inner end edge of the inflow port 5, and a valve element 9 that is separated from and in contact with the valve seat 8. A valve rod 10 connected to the drive unit 3 is attached to the valve element 9. A sealing bellows 12 is provided around the valve rod 10 in order to prevent leakage of low-temperature fluid from a portion of the push 11 that slidably supports the valve rod 10.
前記駆動部３は、駆動体13とベローズ14により加圧室
15と常圧室16とに区画形成されており、加圧室15には、
駆動用低温ガス給排用の加圧配管が連通されている。駆
動体13には、前記弁棒10の端部が結合されるとともに、
駆動体13を開弁方向に付勢するスプリング18が設けられ
ている。このスプリング18の他端部は、スプリング抑え
19に当接しており、調節ナット20により、スプリング18
の付勢力が調節されている。また調節ナット20は、前記
ブッシュ11とともに弁棒10を摺動可能に支持している。The drive unit 3 includes a drive unit 13 and a bellows 14 to form a pressure chamber.
It is divided into 15 and the normal pressure chamber 16, and the pressurizing chamber 15 has
Pressurized pipes for supplying and discharging the low temperature gas for driving are connected. An end portion of the valve rod 10 is coupled to the driving body 13, and
A spring 18 for urging the driving body 13 in the valve opening direction is provided. The other end of this spring 18 is
Abutment 19 and spring 18
Has been adjusted. Further, the adjusting nut 20 slidably supports the valve rod 10 together with the bush 11.
次に前記制御部４は、ポジショナ21を主体に構成され
るもので、ポジショナ21には、前記駆動部３の加圧室15
に連通された駆動用低温ガス給排用の加圧配管と、該駆
動用低温ガスを導入する導入管22及びこの低温弁１の開
度を指示する信号入力回路23と、弁棒10の中間部に設け
られたピン24に接続されたフィードバックレバー25が接
続されており、制御部４の外壁には、ポジショナ21で使
用された駆動用低温ガスを排気する排気管26が接続され
ている。Next, the control unit 4 is mainly composed of a positioner 21, and the positioner 21 includes a pressurizing chamber 15 of the drive unit 3.
A pressurizing pipe for supplying / discharging the driving low-temperature gas, an introducing pipe 22 for introducing the driving low-temperature gas, a signal input circuit 23 for instructing the opening degree of the low-temperature valve 1, and an intermediate portion of the valve rod 10. A feedback lever 25 connected to a pin 24 provided in the section is connected, and an exhaust pipe 26 for exhausting the driving low temperature gas used in the positioner 21 is connected to the outer wall of the control unit 4.
この低温弁１の開閉駆動用に用いられる駆動用低温ガ
スは、低温弁１を流れる低温流体と略同じ温度のガスが
使用される。そのため、低温流体と略同じ温度で、かつ
低温弁１を駆動開閉さることのできる圧力下で液化しな
い組成のガスであることが必要である。例えば、使用温
度−196℃，圧力5kg/cm2の条件では、窒素（N2）約10
％，ヘリウム（He）約6.7％，ネオン（Ne）約83.3％の
ガスが用いられる。As the driving low temperature gas used for opening / closing driving of the low temperature valve 1, a gas having substantially the same temperature as the low temperature fluid flowing through the low temperature valve 1 is used. Therefore, it is necessary that the gas has a composition that does not liquefy at a temperature substantially the same as that of the cryogenic fluid and under the pressure that can drive and open the cryogenic valve 1. For example, under the conditions of operating temperature of −196 ° C. and pressure of 5 kg / cm 2 , nitrogen (N 2 ) is about 10
%, Helium (He) about 6.7%, neon (Ne) about 83.3% gas is used.
液化窒素や液化酸素等の液化ガスあるいは液化点近く
まで冷却されたガスからなる低温流体は、弁体部２の流
入口から弁箱７内に流入し、所定量に開かれた弁座８と
弁子９の間を通り、流出口６から流出する。この時の弁
体部２の開度は、前記フィードバックレバー25によりポ
ジショナ21に入力されている。A low-temperature fluid consisting of a liquefied gas such as liquefied nitrogen or liquefied oxygen or a gas cooled to near the liquefaction point flows into the valve box 7 from the inlet of the valve body 2 and the valve seat 8 opened to a predetermined amount. It passes between the valves 9 and flows out from the outlet 6. The opening degree of the valve body 2 at this time is input to the positioner 21 by the feedback lever 25.
そして低温流体の流量を変化させる場合には、別に設
けられた流量調節計等からの指示が前記信号入力回路23
からポジショナ21に入力される。ポジショナ21は、信号
入力回路23から入力された設定値とフィードバックレバ
ー25を介して検出した弁体部２の開度とを比較して前記
駆動部３の加圧室15に導入する駆動用低温ガスの圧力を
制御する。When changing the flow rate of the low temperature fluid, an instruction from a separately provided flow rate controller or the like is used for the signal input circuit 23.
Is input to the positioner 21 from. The positioner 21 compares the set value input from the signal input circuit 23 with the opening degree of the valve body 2 detected via the feedback lever 25, and introduces it into the pressurizing chamber 15 of the drive unit 3 for driving low temperature. Controls gas pressure.
例えば低温流体の流量を増加させる場合には、弁体部
２の開度を指示する信号が信号入力回路23から入力さ
れ、ポジショナ21により検出されている現状の弁体部２
の開度と比較されて両者の偏差値が零となるようにポジ
ショナ21から駆動部３の加圧室15に送る駆動用低温ガス
の量（圧力）を減らす。これにより、駆動体13が前記ス
プリング18の作用により移動するとともに、弁棒10を介
して弁子９が弁座８から離れる方向に移動し、低温流体
の流量を増加させる。For example, when increasing the flow rate of the low temperature fluid, a signal indicating the opening degree of the valve body portion 2 is input from the signal input circuit 23, and the current valve body portion 2 detected by the positioner 21 is used.
The amount (pressure) of the low-temperature driving gas sent from the positioner 21 to the pressurizing chamber 15 of the drive unit 3 is reduced so that the deviation value between the two becomes zero. As a result, the driving body 13 moves by the action of the spring 18, and the valve element 9 moves in the direction away from the valve seat 8 via the valve rod 10 to increase the flow rate of the cryogenic fluid.
低温流体の流量を低減させる場合は、これとは逆に、
圧力室15に送る駆動用低温ガスの量を増すことにより、
弁子９を弁座８に近接する方向に移動させる。On the contrary, when reducing the flow rate of the cryogenic fluid,
By increasing the amount of low-temperature driving gas sent to the pressure chamber 15,
The valve element 9 is moved in the direction close to the valve seat 8.
またポジショナ21で使用された駆動用低温ガスは、大
気圧状態で排気管26から排気されるが、必要により熱交
換器や圧縮機等を設けて導入管22に循環させることがで
きる。Further, the driving low temperature gas used in the positioner 21 is exhausted from the exhaust pipe 26 at atmospheric pressure, but if necessary, a heat exchanger, a compressor or the like may be provided and circulated in the introduction pipe 22.
このように低温弁１を構成することにより、弁体部２
と駆動部３及び弁体部２の開閉を制御する制御部４とが
一体化し、低温弁１をコンパクトに纏めることができ、
コールドボックス内の機器等の近くに配置することがで
きるので、配管の熱膨張・収縮を考慮する必要がなく、
装置全体の小型化が図れ、特に超大型装置等の配管口径
が大きいものでは、この小型化の効果が大きい。また制
御部４と駆動部３が近接しているため、反応性を向上さ
せることができ、確実な作動を行わせることができる。By configuring the low temperature valve 1 in this way, the valve body portion 2
The drive unit 3 and the control unit 4 that controls the opening and closing of the valve body 2 are integrated, and the low temperature valve 1 can be compactly assembled.
Since it can be placed near the equipment in the cold box, there is no need to consider the thermal expansion and contraction of the piping.
It is possible to reduce the size of the entire apparatus, and particularly in an apparatus having a large pipe diameter such as an ultra-large apparatus, the effect of the size reduction is great. Further, since the control unit 4 and the driving unit 3 are close to each other, the reactivity can be improved and the reliable operation can be performed.
本発明は以上説明したように、弁体部と、該弁体部の
開閉を、前記低温流体と略同温でかつ低温弁を駆動開閉
できる圧力下で液化しない組成の駆動用低温ガスにより
行う駆動部と、前記弁体部の開度を検出するポジショナ
を備えた制御部とを一体的に構成し、該ポジショナと前
記駆動部の加圧室とを駆動用低温ガス給排用の加圧配管
で連通するともに、前記制御部は、ポジショナにより検
出された弁体部の開度と設定値とを比較して前記駆動用
低温ガスの圧力を制御するので、低温弁をコンパクトに
纏めることができ、また機器の近くに配置できるので装
置全体の小型化が図れる。しかも、制御部と駆動部が近
接しているため、駆動用低温ガス給排用の加圧配管を短
くでき、応答性を向上させることができる。As described above, according to the present invention, the valve body portion and the opening and closing of the valve body portion are performed by the driving low temperature gas having a composition that is not liquefied under the pressure that is substantially the same temperature as the low temperature fluid and that can drive and open the low temperature valve. A drive unit and a control unit having a positioner for detecting the opening degree of the valve body are integrally configured, and the positioner and the pressurizing chamber of the drive unit are pressurized for driving low temperature gas supply / discharge. Since the control unit controls the pressure of the driving low-temperature gas by comparing the opening degree of the valve body detected by the positioner with a set value, the low-temperature valve can be compactly assembled. In addition, since it can be arranged near the equipment, the overall size of the device can be reduced. Moreover, since the control unit and the driving unit are close to each other, the pressurizing pipe for supplying and discharging the low temperature gas for driving can be shortened, and the responsiveness can be improved.
第１図は本発明の一実施例を示す低温弁の断面正面図、
第２図は第１図のII−II断面図である。 １……低温弁、２……弁体部、３……駆動部、４……制
御部、７……弁箱、８……弁座、９……弁子、10……弁
棒、13……駆動体、12,14……ベローズ、15……加圧
室、17……駆動用低温ガス給排用の加圧配管、18……ス
プリング、21……ポジショナ、22……導入管、23……信
号入力回路、25……フィードバックレバーFIG. 1 is a sectional front view of a cryogenic valve showing one embodiment of the present invention,
FIG. 2 is a sectional view taken along the line II-II of FIG. 1 ... Low temperature valve, 2 ... Valve body, 3 ... Drive section, 4 ... Control section, 7 ... Valve box, 8 ... Valve seat, 9 ... Valve, 10 ... Valve rod, 13 ...... Driving body, 12,14 ...... Bellows, 15 ...... Pressure chamber, 17 ...... Pressurizing pipe for driving low temperature gas, 18 ...... Spring, 21 ...... Positioner, 22 ...... Introduction pipe, 23 …… Signal input circuit, 25 …… Feedback lever
Claims (1)
に配置して、低温下で作動して低温流体の流量を制御す
る低温弁において、弁体部と、該弁体部の開閉を、前記
低温流体と略同温でかつ低温弁を駆動開閉できる圧力下
で液化しない組成の駆動用低温ガスにより行う駆動部
と、前記弁体部の開度を検出するポジショナを備えた制
御部とを一体的に構成し、該ポジショナと前記駆動部の
加圧室とを駆動用低温ガス給排用の加圧配管で連通する
ともに、前記制御部は、ポジショナにより検出された弁
体部の開度と設定値とを比較して前記駆動用低温ガスの
圧力を制御するものであることを特徴とする低温弁。1. A low temperature valve which is placed in a low temperature chamber such as a cold box of a deep-cooling device and operates at low temperature to control the flow rate of a low temperature fluid. A driving unit that is driven by a driving low-temperature gas having a composition that does not liquefy under a pressure that is approximately the same temperature as the low-temperature fluid and that can drive and open the low-temperature valve; and a control unit that includes a positioner that detects the opening of the valve body. The positioner and the pressurizing chamber of the drive unit are connected to each other by a pressurizing pipe for driving low-temperature gas for driving, and the control unit controls the opening degree of the valve body unit detected by the positioner. And a set value are compared to control the pressure of the driving low temperature gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62278632A JP2529583B2 (en) | 1987-11-04 | 1987-11-04 | Low temperature valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62278632A JP2529583B2 (en) | 1987-11-04 | 1987-11-04 | Low temperature valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01119810A JPH01119810A (en) | 1989-05-11 |
| JP2529583B2 true JP2529583B2 (en) | 1996-08-28 |
Family
ID=17599980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62278632A Expired - Lifetime JP2529583B2 (en) | 1987-11-04 | 1987-11-04 | Low temperature valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2529583B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130327403A1 (en) * | 2012-06-08 | 2013-12-12 | Kurtis Kevin Jensen | Methods and apparatus to control and/or monitor a pneumatic actuator |
| CN114578875B (en) * | 2022-03-07 | 2023-04-07 | 杭州电子科技大学 | Device and method for realizing low-temperature work of pneumatic valve positioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6350529Y2 (en) * | 1979-12-24 | 1988-12-26 | ||
| JPS59189969U (en) * | 1983-06-03 | 1984-12-17 | 株式会社 ガスタ− | Water control device for proportional control type gas water heater |
| JPH0777662B2 (en) * | 1984-02-10 | 1995-08-23 | 宇部興産株式会社 | Flow control method |
| JPH0329607Y2 (en) * | 1985-04-01 | 1991-06-24 |
-
1987
- 1987-11-04 JP JP62278632A patent/JP2529583B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01119810A (en) | 1989-05-11 |
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