FI892168A - Kuristusventtiili, jossa on virtausnopeutta mittaava toiminto, sekä menetelmä virtausnopeuden mittaamiseksi kuristusventtiilin avulla - Google Patents
Kuristusventtiili, jossa on virtausnopeutta mittaava toiminto, sekä menetelmä virtausnopeuden mittaamiseksi kuristusventtiilin avulla Download PDFInfo
- Publication number
- FI892168A FI892168A FI892168A FI892168A FI892168A FI 892168 A FI892168 A FI 892168A FI 892168 A FI892168 A FI 892168A FI 892168 A FI892168 A FI 892168A FI 892168 A FI892168 A FI 892168A
- Authority
- FI
- Finland
- Prior art keywords
- measuring
- butterfly valve
- flow rate
- valve
- function
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
- G01F1/115—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
- G01F1/26—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters of the valve type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/28—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7759—Responsive to change in rate of fluid flow
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8225—Position or extent of motion indicator
- Y10T137/8242—Electrical
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Measuring Volume Flow (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Flow Control (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3896589 | 1989-02-17 | ||
JP1038965A JP2574449B2 (ja) | 1989-02-17 | 1989-02-17 | バタフライ弁 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI892168A0 FI892168A0 (fi) | 1989-05-05 |
FI892168A true FI892168A (fi) | 1990-08-18 |
FI95074B FI95074B (fi) | 1995-08-31 |
FI95074C FI95074C (fi) | 1995-12-11 |
Family
ID=12539877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI892168A FI95074C (fi) | 1989-02-17 | 1989-05-05 | Kuristusventtiili, jossa on virtausnopeutta mittaava toiminto, sekä menetelmä virtausnopeuden mittaamiseksi kuristusventtiilin avulla |
Country Status (18)
Country | Link |
---|---|
US (1) | USRE33649E (fi) |
EP (1) | EP0382964B1 (fi) |
JP (1) | JP2574449B2 (fi) |
KR (1) | KR940011014B1 (fi) |
CN (1) | CN1018572B (fi) |
AT (1) | ATE120274T1 (fi) |
AU (1) | AU614839B2 (fi) |
BR (1) | BR8902580A (fi) |
CA (1) | CA1335900C (fi) |
DE (1) | DE68921872T2 (fi) |
DK (1) | DK237389A (fi) |
ES (1) | ES2069581T3 (fi) |
FI (1) | FI95074C (fi) |
MX (1) | MX173847B (fi) |
MY (1) | MY105957A (fi) |
NO (1) | NO176854C (fi) |
NZ (1) | NZ229129A (fi) |
PT (1) | PT90551B (fi) |
Families Citing this family (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9001562A (nl) * | 1990-07-09 | 1992-02-03 | Keystone Int | Meet- en regelafsluiter. |
JP2600763Y2 (ja) * | 1991-05-20 | 1999-10-25 | アネルバ株式会社 | 弁装置 |
ES2078135B1 (es) * | 1991-12-10 | 1996-08-16 | Quinones Alfredo Lopez | Contador de gas perfeccionado. |
US5487302A (en) * | 1993-03-01 | 1996-01-30 | Lockheed Martin Energy Systems, Inc. | Method and system for measuring gate valve clearances and seating force |
GB2286871B (en) * | 1994-02-16 | 1997-11-05 | Btr Plc | Butterfly valve |
DE19612370C1 (de) * | 1996-03-28 | 1997-11-20 | Samson Ag | Verfahren und Vorrichtung zur Durchflußbestimmung eines Prozeßmediums an einem Stellgerät |
GB9914500D0 (en) * | 1999-06-22 | 1999-08-25 | Axon Instr Limited | Flow meter |
US6739205B2 (en) * | 2001-02-15 | 2004-05-25 | Schneider Automation Inc. | Controller for monitoring fluid flow volume |
US6644133B2 (en) * | 2001-02-15 | 2003-11-11 | Schneider Automation, Inc. | Flow meter module for a controller |
US20050127317A1 (en) * | 2003-12-11 | 2005-06-16 | Rebello Peter J. | Metering ball valve and method of determining fluid flow therethrough |
DE102004005977A1 (de) * | 2004-02-06 | 2005-08-25 | Volkswagen Ag | Vorrichtung zum Messen eines Strömungsparameters einer Wirbelströmung |
DE102005048726B4 (de) * | 2005-10-12 | 2010-09-16 | Airbus Deutschland Gmbh | Lecksucher |
WO2008036010A1 (en) * | 2006-09-19 | 2008-03-27 | Industriell Plåtproduktion Ab | Exhaust gas system |
CN101852661A (zh) * | 2009-03-31 | 2010-10-06 | 项美根 | 阀门扭矩连续测试装置及其测试方法 |
DE102009017634A1 (de) * | 2009-04-16 | 2011-03-31 | Z & J Technologies Gmbh | Doppelplattenschieber |
US8156822B2 (en) * | 2009-12-01 | 2012-04-17 | Bettelle Energy Alliance, Llc | Force measuring valve assemblies, systems including such valve assemblies and related methods |
JP5397351B2 (ja) * | 2010-08-23 | 2014-01-22 | 株式会社デンソー | 流量検出装置 |
CN103403425B (zh) * | 2010-11-16 | 2015-01-14 | 株式会社富士金 | 手动阀用开度检测装置 |
CN103748391B (zh) * | 2011-06-02 | 2016-04-27 | 高级阀私人有限公司 | 手动平衡阀 |
KR101268481B1 (ko) * | 2011-08-12 | 2013-06-04 | 한국수력원자력 주식회사 | 밸브패킹 마찰계수 시험장치 및 그 방법 |
US9562623B2 (en) * | 2012-05-25 | 2017-02-07 | Mueller International, Llc | Position indicator for valves |
ES2566785T5 (es) * | 2012-05-31 | 2019-04-23 | Trox Gmbh Geb | Válvula para su disposición en un conducto de flujo de una instalación de climatización |
US10295080B2 (en) | 2012-12-11 | 2019-05-21 | Schneider Electric Buildings, Llc | Fast attachment open end direct mount damper and valve actuator |
DK2971901T3 (en) | 2013-03-15 | 2019-01-07 | Schneider Electric Buildings | Advanced valve actuator with integrated energy measurement |
CN105229349B (zh) * | 2013-03-15 | 2018-07-13 | 施耐德电气建筑有限公司 | 具有真实流量反馈的先进阀门致动器 |
JP6427370B2 (ja) * | 2013-09-30 | 2018-11-21 | 株式会社フジキン | 回転弁 |
CN104132180A (zh) * | 2014-07-07 | 2014-11-05 | 中原工学院 | 阀门执行器主轴位置的测量传动机构 |
DE102014110161A1 (de) | 2014-07-18 | 2016-01-21 | Krones Aktiengesellschaft | Verfahren zum Befüllen eines Behälters mit einem Füllprodukt mittels eines Proportionalventils |
FR3024183B1 (fr) * | 2014-07-22 | 2019-07-26 | Delphi Technologies Ip Limited | Injecteur de carburant |
ES2531064A1 (es) * | 2014-09-09 | 2015-03-10 | Univ Madrid Politecnica | Procedimiento y sistema para la medición de caudal de agua con llaves de mariposa |
JP6137126B2 (ja) * | 2014-11-13 | 2017-05-31 | トヨタ自動車株式会社 | バルブ制御装置およびバルブ制御方法 |
CN104407630B (zh) * | 2014-11-19 | 2017-09-22 | 江苏天泽环保科技有限公司 | 一种基于传感器网络的流体流量控制阀的控制方法 |
CN104455641B (zh) * | 2014-12-04 | 2017-05-17 | 天津埃柯特测控技术有限公司 | 检测级执行机构 |
CN104748809B (zh) * | 2015-03-30 | 2017-12-26 | 王向乔 | 基于调压器的智能计量仪及计量方法 |
JP2016192039A (ja) * | 2015-03-31 | 2016-11-10 | アズビル株式会社 | 流量制御弁 |
WO2017039698A1 (en) | 2015-09-04 | 2017-03-09 | Halliburton Energy Services, Inc. | Critical valve performance monitoring system |
US10895254B2 (en) | 2015-09-04 | 2021-01-19 | Halliburton Energy Services, Inc. | Pressure pump valve monitoring system |
CA2993148C (en) * | 2015-09-04 | 2019-01-15 | Halliburton Energy Services, Inc. | Flow-rate monitoring system for a pressure pump |
WO2017039700A1 (en) | 2015-09-04 | 2017-03-09 | Halliburton Energy Services, Inc. | Single-sensor analysis system |
CA2992014C (en) | 2015-09-04 | 2021-01-26 | Halliburton Energy Services, Inc. | Monitoring system for pressure pump cavitation |
US9739651B1 (en) * | 2016-05-23 | 2017-08-22 | Saudi Arabian Oil Company | Variable cone flow meter |
WO2018044293A1 (en) | 2016-08-31 | 2018-03-08 | Halliburton Energy Services, Inc. | Pressure pump performance monitoring system using torque measurements |
CA3027292C (en) | 2016-09-15 | 2020-10-13 | Halliburton Energy Services, Inc. | Pressure pump balancing system |
JP6753791B2 (ja) * | 2017-02-07 | 2020-09-09 | アズビル株式会社 | メンテナンス時期予測装置、流量制御装置およびメンテナンス時期予測方法 |
EP3710906B1 (en) * | 2017-12-05 | 2024-06-05 | Flowserve Pte. Ltd. | Position sensors for valve systems and related assemblies, systems and methods |
KR102165227B1 (ko) * | 2018-11-15 | 2020-10-13 | 김기덕 | 스마트 밸브 시스템 |
CN110185806A (zh) * | 2019-06-20 | 2019-08-30 | 江苏百时得计量设备有限公司 | 一种测控一体式阀门流量计 |
CN114135711B (zh) * | 2021-12-08 | 2023-11-03 | 中国航发南方工业有限公司 | 一种新型伺服液动式线性蝶形调节阀 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1877810A (en) * | 1926-09-07 | 1932-09-20 | Waterworks Supply Company | Indicating and controlling system |
US2501583A (en) * | 1946-06-13 | 1950-03-21 | Honeywell Regulator Co | Electric motor control device |
US2662547A (en) * | 1946-09-03 | 1953-12-15 | Garrett Corp | Flow control apparatus |
GB631973A (en) * | 1947-02-27 | 1949-11-14 | Richard Harvey Webb | Improvements in or relating to flow-meters |
US2723615A (en) * | 1952-09-12 | 1955-11-15 | Garrett Corp | System and apparatus for pressurization of aircraft cabins |
DE1225886B (de) * | 1960-11-19 | 1966-09-29 | Paul Flatten Fa | Vorrichtung zur Messung der Stoffgeschwindigkeit bzw. des Mengenstromes |
US3240062A (en) * | 1962-12-05 | 1966-03-15 | Fredriksson Curt Johan | Flow-controlling apparatus |
US3225785A (en) * | 1963-03-01 | 1965-12-28 | Cons Electrodynamics Corp | Servo-system for fluid flow regulating valves |
US3331388A (en) * | 1965-05-04 | 1967-07-18 | Caterpillar Tractor Co | Control system and fluid flow transducer therefor |
US3776249A (en) * | 1972-07-14 | 1973-12-04 | Valve M Co | Pipeline flow control system and method |
JPS5825853B2 (ja) * | 1975-05-23 | 1983-05-30 | カブシキガイシヤ ニツポンジドウシヤブヒンソウゴウケンキユウシヨ | 内燃機関のスロツトル弁制御装置 |
DE2614811B2 (de) * | 1976-04-02 | 1979-07-12 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Durchflußmeßgerät mit einem plattenförmigen Meßkörper |
US4157661A (en) * | 1978-03-07 | 1979-06-12 | Milltronics Limited | Flowmeters |
AU530314B2 (en) * | 1978-09-01 | 1983-07-14 | Advanced Medical Technologies, Inc. | Apparatus for controlling the flow of intravenous fluid to patient |
JPS5825911B2 (ja) * | 1979-04-20 | 1983-05-30 | 株式会社 巴技術研究所 | ちよう形弁のシ−トリング |
JPS5628355A (en) * | 1979-05-15 | 1981-03-19 | Tomoe Gijutsu Kenkyusho:Kk | Sealing mechanism for butterfly valve |
GB2077434B (en) * | 1980-05-30 | 1984-04-26 | Millar John | Ascertaining flow rate through valves or pumps |
US4428242A (en) * | 1982-03-11 | 1984-01-31 | Amsted Industries Incorporated | Flowmeter using twisting torque |
JPS60120218A (ja) * | 1983-11-29 | 1985-06-27 | アムステッド・インダストリ−ス・イン・コ−ポレ−テッド | 流量測定装置と流量測定−制御弁並びに流量測定法 |
DE3513543A1 (de) * | 1985-04-16 | 1986-10-16 | Hydrotechnik Gmbh, 6250 Limburg | Klappendurchflussmesser |
JPS621117A (ja) * | 1985-06-26 | 1987-01-07 | Hitachi Maxell Ltd | 磁気記録媒体 |
JPS62223622A (ja) * | 1986-03-25 | 1987-10-01 | Kurifu Kk | 風量制御測定方法並びに装置 |
JPS62270873A (ja) * | 1986-05-16 | 1987-11-25 | Tomoe Gijutsu Kenkyusho:Kk | 流量制御特性を有するバタフライ弁 |
JPS63120973A (ja) * | 1986-11-06 | 1988-05-25 | Tomoe Gijutsu Kenkyusho:Kk | 自動制御弁の作動方法 |
-
1989
- 1989-02-17 JP JP1038965A patent/JP2574449B2/ja not_active Expired - Fee Related
- 1989-04-25 MY MYPI89000602A patent/MY105957A/en unknown
- 1989-05-05 FI FI892168A patent/FI95074C/fi not_active IP Right Cessation
- 1989-05-09 CA CA000599136A patent/CA1335900C/en not_active Expired - Fee Related
- 1989-05-10 NO NO891911A patent/NO176854C/no unknown
- 1989-05-11 AU AU34693/89A patent/AU614839B2/en not_active Ceased
- 1989-05-12 PT PT90551A patent/PT90551B/pt not_active IP Right Cessation
- 1989-05-12 MX MX016028A patent/MX173847B/es unknown
- 1989-05-12 BR BR898902580A patent/BR8902580A/pt not_active IP Right Cessation
- 1989-05-13 CN CN89103329A patent/CN1018572B/zh not_active Expired
- 1989-05-15 KR KR1019890006424A patent/KR940011014B1/ko not_active IP Right Cessation
- 1989-05-15 NZ NZ229129A patent/NZ229129A/en unknown
- 1989-05-16 ES ES89304908T patent/ES2069581T3/es not_active Expired - Lifetime
- 1989-05-16 AT AT89304908T patent/ATE120274T1/de active
- 1989-05-16 EP EP89304908A patent/EP0382964B1/en not_active Expired - Lifetime
- 1989-05-16 DE DE68921872T patent/DE68921872T2/de not_active Expired - Fee Related
- 1989-05-16 DK DK237389A patent/DK237389A/da unknown
-
1990
- 1990-10-09 US US07/594,866 patent/USRE33649E/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
NO176854B (no) | 1995-02-27 |
BR8902580A (pt) | 1990-11-20 |
PT90551A (pt) | 1990-08-31 |
NZ229129A (en) | 1990-11-27 |
ES2069581T3 (es) | 1995-05-16 |
EP0382964A3 (en) | 1991-08-07 |
CN1044978A (zh) | 1990-08-29 |
DE68921872T2 (de) | 1995-07-27 |
KR900013294A (ko) | 1990-09-05 |
AU3469389A (en) | 1990-08-23 |
DE68921872D1 (de) | 1995-04-27 |
USRE33649E (en) | 1991-07-30 |
FI95074C (fi) | 1995-12-11 |
PT90551B (pt) | 1995-09-12 |
MX173847B (es) | 1994-04-05 |
NO891911D0 (no) | 1989-05-10 |
NO176854C (no) | 1995-06-07 |
EP0382964B1 (en) | 1995-03-22 |
CA1335900C (en) | 1995-06-13 |
CN1018572B (zh) | 1992-10-07 |
MY105957A (en) | 1995-02-28 |
NO891911L (no) | 1990-08-20 |
KR940011014B1 (ko) | 1994-11-22 |
DK237389A (da) | 1990-08-18 |
JPH02216418A (ja) | 1990-08-29 |
FI95074B (fi) | 1995-08-31 |
DK237389D0 (da) | 1989-05-16 |
FI892168A0 (fi) | 1989-05-05 |
JP2574449B2 (ja) | 1997-01-22 |
ATE120274T1 (de) | 1995-04-15 |
AU614839B2 (en) | 1991-09-12 |
EP0382964A2 (en) | 1990-08-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: TOMOE TECHNICAL RESEARCH COMPANY |