[go: up one dir, main page]

WO2018100447A1 - Débitmètre électromagnétique pouvant être fixé - Google Patents

Débitmètre électromagnétique pouvant être fixé Download PDF

Info

Publication number
WO2018100447A1
WO2018100447A1 PCT/IB2017/056274 IB2017056274W WO2018100447A1 WO 2018100447 A1 WO2018100447 A1 WO 2018100447A1 IB 2017056274 W IB2017056274 W IB 2017056274W WO 2018100447 A1 WO2018100447 A1 WO 2018100447A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow pipe
housing
flow
attachable
electromagnetic flowmeter
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.)
Ceased
Application number
PCT/IB2017/056274
Other languages
English (en)
Inventor
Subhashish Dasgupta
Ravikumar KANDASAMY
Vinay KARIWALA
Philipp Nenninger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of WO2018100447A1 publication Critical patent/WO2018100447A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01F1/56—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 electric or magnetic effects
    • G01F1/58—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 electric or magnetic effects by electromagnetic flowmeters
    • G01F1/588—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 electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor

Definitions

  • the present invention relates generally to an electromagnetic flowmeter and more particularly to an electromagnetic flowmeter that can be attached to a flow pipe for measuring flow of fluid in a flow pipe.
  • Measurement of flow of fluids through a conduit or pipe can be done by numerous ways like using electromagnetic flowmeters. Electromagnetic flowmeters are popular flow measurement devices owing to their non-invasiveness and accuracy.
  • a typical electromagnetic flowmeter works on Faraday's law of electromagnetic induction.
  • An electromagnetic field is imposed within a flow pipe having a flow of fluid with a certain level of conductivity.
  • Electromotive force (EMF) induced as a result of the interaction of the electromagnetic field with fluid molecules (ions in the fluid), is measured using electrodes provided at the pipe side walls. The measured EMF is proportional to the flowrate and thus used to measure flowrate. While electromagnetic flowmeters are attractive given that they are noninvasive, accurate and simplistic in construction, it is desirable to reduce the material cost and/or weight of the flowmeters, especially for application in large diameter flow pipes.
  • Insertion type flowmeters intrude into a fluid space encompassed by the flow pipe, and a flowrate is sampled over that zone of fluid space within the flow pipe (local velocity measurement). It is observed that, insertion type flowmeters intrude into the fluid space inside the flow pipe causing pressure drop and disturbing the flow dynamics of the fluid flowing the flow pipe. In insertion type flowmeters a pressure drop is caused due to the intrusion or in other words an obstruction to flow is caused in the flow pipe. Additionally, insertion types are prone to corrosion by corrosive substances in the flow pipe.
  • full bore flowmeters are preferable over insertion type flowmeters. Accuracy is better in full bore flowmeters mainly as flowrate is measured over a larger sampling volume. However full bore flowmeters are expensive and increases the footprint of the flowmeter.
  • the present invention provides an attachable electromagnetic flowmeter for measuring a flow of fluid in a flow pipe
  • the electromagnetic flowmeter comprising a housing that is attachable on an outer surface of the flow pipe on an opening provided in the flow pipe for attaching the housing of the electromagnetic flowmeter and includes a cavity within the housing with an inner sheath around the opening provided in the flow pipe with a first surface of the inner sheath on attachment of the housing on the outer surface of the flow pipe and allows the fluid flowing through the flow pipe to flow through the cavity formed with the inner sheath of the housing attached on the outer surface of the flow pipe; a coil mounted on a second surface of the inner sheath of the housing for generating electromagnetic field on electrical excitation that interacts with the fluid flowing through the cavity; and a pair of electrodes for measuring potential difference generated by the interaction of electromagnetic field in the fluid flowing in the cavity to determine the flow of fluid in the flow pipe.
  • the attachable electromagnetic flowmeter as mentioned herein above wherein the housing can be attached to the outer surface of the flow pipe using welded joints to the opening provided in the flow pipe.
  • the housing can be attached to the outer surface of the flow pipe using bolted joints to the opening provided in the flow pipe.
  • the attachable flowmeter comprises a display for indicating the determined flow of fluid in the flow pipe.
  • the determined flow of fluid in the flow pipe is transmitted to a remote control center of the electromagnetic flowmeter for further analysis.
  • Figure 1 illustrates an attachable electromagnetic flowmeter for measuring a flow of fluid in a flow pipe.
  • Figure 2 illustrates a front view of the attachable electromagnetic flowmeter when the attachment is on top side of the flow pipe.
  • Figure 3 illustrates another front view of the attachable electromagnetic flowmeter when the attachment is on the bottom side of the flow pipe.
  • Figure 4 illustrates a side view of the attachable electromagnetic flowmeter.
  • Figure 5 illustrates front view of the attachable electromagnetic flowmeter with bolted joints for attachment.
  • the present invention is related to an attachable electromagnetic flowmeter for measuring flow of fluid in a flow pipe.
  • the present invention provides an attachable electromagnetic flowmeter which is low in cost, with reduced weight yet providing accurate measurements at par with full bore flowmeters.
  • the electromagnetic flowmeter comprises a housing that is attached through various methods like welding or through bolted connections using flanges to an opening on the outer surface of the flow pipe where the opening on the outer surface of the flow pipe is provided for attaching a flowmeter.
  • the housing comprises a cavity with an inner sheath around the opening on the outer surface of the flow pipe. Hence, the fluid that passes through the flow pipe now also flows through the cavity formed with the inner sheath of the housing because of the fluid pressure and/or gravity.
  • the housing further houses a coil which generates an electromagnetic field on electrical excitation and this electromagnetic field interacts with the fluid flowing through the cavity, and a potential difference is observed when measured using a pair of electrodes placed opposite to each other on the inner sheath, and thus the flow of fluid in the flow pipe can be determined as a measure of potential difference between the pair of electrodes on excitation of the coil.
  • a coil which generates an electromagnetic field on electrical excitation and this electromagnetic field interacts with the fluid flowing through the cavity, and a potential difference is observed when measured using a pair of electrodes placed opposite to each other on the inner sheath, and thus the flow of fluid in the flow pipe can be determined as a measure of potential difference between the pair of electrodes on excitation of the coil.
  • Figure 1 illustrates an attachable electromagnetic flowmeter 100.
  • Figure 1 shows an attachable electromagnetic flowmeter, which comprises a flow pipe 110 through which fluid flows, a coil 120 for generating electromagnetic fields that interact with the fluid passing through the flow pipe particularly in the cavity (150)formed inside the "D" shaped housing, a pair of electrodes (130- referencing an electrode shown in the figure, 140 referencing an electrode not visible in the figure but present at the opposite side facing the electrode 130) placed with a gap between the electrodes for measuring potential difference generated by the interaction of electromagnetic fields in the fluid in the cavity 150.
  • the pair of electrodes (130 and 140) which are placed across the cavity of the flow pipe provide the difference in potential across the cavity.
  • the difference in potential is proportional to the fluid flowrate in the cavity and also representative of the flowrate in the fluid pipe
  • the relationship between velocity of the fluid in the flow pipe and that in the cavity, calculated by a Finite Element (F.E.) code shows a perfect linear relationship between the two velocities suggesting that the measurement of flow in the cavity faithfully reflects flowrate in the main pipe.
  • the flowing fluid fills the cavity space in the electromagnetic flowmeter.
  • the coil is provided above the cavity, as shown in figure 100, and once the coils are electrically excited, they generate an electromagnetic field that traverses the cavity volume.
  • the coil can be of different shapes depending on the need for magnetic field intensity. Interaction of the magnetic flux and the moving fluid, causes a potential difference (Faraday's law of electromagnetic induction) to be measured by the electrodes provided at the walls encompassing the cavity.
  • Figure 2 illustrates a front view of the attachable electromagnetic flowmeter 200 when the attachment is on top side of the flow pipe.
  • Figure 2 illustrates a housing 210, welded joints 220 and 230 for attaching the housing 210 to the opening provided for attaching a flowmeter in the flow pipe 110, the housing has an inner sheath that forms a hallow space (cavity, 150), the housing 210 houses the coil 120 for generating an electromagnetic field that can be placed on the inner sheath, and the front view of one of the electrodes (130 or 140) also secured on the inner sheath.
  • the direction of the flow of fluid in the pipe is indicated as 240.
  • the housing 210 is attachable on the outer surface of the flow pipe with welded joints 220 and 230 on an opening provided in the flow pipe.
  • a hollow space is provided within the housing with an inner sheath 260 that forms a cavity 150 around the opening provided in the flow pipe 110.
  • a first surface 260 of the inner sheath 250 on attachment of the housing on the outer surface of the flow pipe 110 forms a cavity and allows the fluid flowing through the flow pipe to flow through the cavity 150.
  • the coil 120 is mounted on a second surface 270 of the inner sheath 250 of the housing 210 for generating electromagnetic field on electrical excitation that interacts with the fluid flowing through the cavity 150.
  • Figure 3 illustrates another front view of the attachable electromagnetic flowmeter when the attachment is on the bottom side of the flow pipe.
  • Figure 3 illustrates the flexibility that the present invention provides in terms of ability to attach the electromagnetic flowmeter to any portion or side of the flow pipe.
  • Figure 3 also illustrates the housing 210, welded joints 220 and 230 for a attaching the housing 210 to the opening provided in the flow pipe 110, the inner sheath of the housing forms the cavity 150, the housing 210 houses the coil 120 for generating an electromagnetic field, and the front view of one of the electrodes (130 or 140).
  • the direction of the flow of fluid in the pipe is indicated as 340 and the flow of fluid in the cavity is also assisted by gravity.
  • Figure 4 illustrates a side view of the attachable electromagnetic flowmeter 400.
  • the side view of the flow pipe 410 the side view of the housing 210, the side view of the cavity 150, the coil 120 above the cavity 150, and welded joints 220 and 230 are shown.
  • Figure 5 illustrates front view of the attachable electromagnetic flowmeter assembled with flanges having bolted joints for attachment.
  • Figure 5 shows that the housing can be attached to the opening of the flow pipe 110 using bolted joints 510 and 520.
  • Figure 5 illustrates a housing 210, bolted joints 510 and 520 for attaching the housing 210 to the opening provided in the flow pipe 110, the inner sheath of the housing forms the cavity 150, the housing 210 houses the coil 120 for generating an electromagnetic field, and the front view of one of the electrodes (130 or 140).
  • the direction of the flow of fluid in the pipe is indicated as 540.
  • the flowmeter for exciting the coils for producing electromagnetic fields have a suitable power source and electronics circuitries for making potential difference measurements and display/transmitting the measured values.
  • the attachable flowmeter can comprise a display for indicating the determined flow of fluid in the flow pipe.
  • the attachable electromagnetic flowmeter wherein the determined flow of fluid in the flow pipe (measured potential difference between the electrodes) is transmitted to a remote control center of the electromagnetic flowmeter for further analysis.
  • the attachable electromagnetic flowmeter is Internet of Things (IOT) enabled for providing remote controlling, better visibility of the working of the attachable electromagnetic flowmeter, providing real time information to software systems and other surrounding IOT enabled systems.
  • IOT Internet of Things

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

La présente invention concerne un débitmètre électromagnétique pouvant être fixé. Le débitmètre électromagnétique comprend un boîtier qui peut être fixé sur la surface extérieure d'un tuyau d'écoulement et comprend une cavité à l'intérieur du boîtier avec une gaine intérieure dans le tuyau d'écoulement avec une première surface de la gaine intérieure sur la fixation du boîtier sur la surface extérieure du tuyau d'écoulement et permet au fluide s'écoulant à travers le tuyau d'écoulement de s'écouler à travers la cavité formée avec la gaine intérieure du boîtier fixé sur la surface extérieure du tuyau d'écoulement; une bobine installée sur une seconde surface de la gaine intérieure du boîtier pour générer un champ électromagnétique; une paire d'électrodes pour mesurer une différence de potentiel générée par l'interaction d'un champ électromagnétique dans le fluide s'écoulant dans la cavité pour déterminer le débit de fluide dans le tuyau d'écoulement.
PCT/IB2017/056274 2016-11-30 2017-10-11 Débitmètre électromagnétique pouvant être fixé Ceased WO2018100447A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201641040981 2016-11-30
IN201641040981 2016-11-30

Publications (1)

Publication Number Publication Date
WO2018100447A1 true WO2018100447A1 (fr) 2018-06-07

Family

ID=60302426

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/056274 Ceased WO2018100447A1 (fr) 2016-11-30 2017-10-11 Débitmètre électromagnétique pouvant être fixé

Country Status (1)

Country Link
WO (1) WO2018100447A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108801383A (zh) * 2018-08-20 2018-11-13 江苏赛达电子科技有限公司 基于NB-IoT的无磁智能水表

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372589A (en) * 1965-06-14 1968-03-12 Fischer & Porter Co Side-saddle magnetic flowmeter
WO1996018086A1 (fr) * 1994-12-06 1996-06-13 Hersey Measurement Company Debitmetre magnetique
US5693892A (en) * 1996-05-01 1997-12-02 Amj Equipment Corporation Apparatus for sensing liquid flow in a conduit or open channel and associated method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372589A (en) * 1965-06-14 1968-03-12 Fischer & Porter Co Side-saddle magnetic flowmeter
WO1996018086A1 (fr) * 1994-12-06 1996-06-13 Hersey Measurement Company Debitmetre magnetique
US5693892A (en) * 1996-05-01 1997-12-02 Amj Equipment Corporation Apparatus for sensing liquid flow in a conduit or open channel and associated method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108801383A (zh) * 2018-08-20 2018-11-13 江苏赛达电子科技有限公司 基于NB-IoT的无磁智能水表

Similar Documents

Publication Publication Date Title
EP3435040B1 (fr) Capteur de flux électromagnétique
RU2615205C2 (ru) Магнитный расходомер с множественными катушками
JP5097855B2 (ja) 速度増進フロー測定
KR970022231A (ko) 전자유량계
US20160187176A1 (en) Fluid parameter sensor and meter
EP3022532B1 (fr) Débitmètre magnétique
JP6158704B2 (ja) 電磁流量計
US20210396556A1 (en) An electromagnetic flowmeter with adjustable coil and shield assembly
WO2018207009A1 (fr) Procédé et système permettant de configurer un débitmètre électromagnétique
EP3874239B1 (fr) Ensemble débitmètre électromagnétique avec un anneau magnétique mobile
WO2018100447A1 (fr) Débitmètre électromagnétique pouvant être fixé
US20060169054A1 (en) Magnetic-inductive flow meter with a measuring tube made of plastic
RU2431118C2 (ru) Электромагнитный расходомер жидких металлов
WO2018193294A1 (fr) Débitmètre électromagnétique
US7272978B2 (en) Magnetic-inductive flow meter with an electrically isolated measuring tube
EP3628982B1 (fr) Ensemble de débitmètre magnétique à passage intégral
CN111771104B (zh) 电磁流量计
RU175421U1 (ru) Погружной датчик локальной скорости
RU2652649C1 (ru) Погружной датчик локальной скорости
CN211978009U (zh) 电磁流量计组件
RU2555517C2 (ru) Электромагнитный расходомер большого диаметра
RU2422780C1 (ru) Способ имитационного моделирования электромагнитных расходомеров жидких металлов
SU603849A1 (ru) Электромагнитный расходомер
CN203657868U (zh) 一种电磁和超声波一体化设计的流量计
US11493373B2 (en) Clamp on electromagnetic flowmeter for determining flow in a pipe using leakage current compensation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17797443

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17797443

Country of ref document: EP

Kind code of ref document: A1