WO2012152560A1 - Compteur de gaz, en particulier pour grand débits - Google Patents

Compteur de gaz, en particulier pour grand débits Download PDF

Info

Publication number
WO2012152560A1
WO2012152560A1 PCT/EP2012/057175 EP2012057175W WO2012152560A1 WO 2012152560 A1 WO2012152560 A1 WO 2012152560A1 EP 2012057175 W EP2012057175 W EP 2012057175W WO 2012152560 A1 WO2012152560 A1 WO 2012152560A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
conduit
meter
gas
outlet section
Prior art date
Application number
PCT/EP2012/057175
Other languages
English (en)
Inventor
Francesco RAMPAZZO
Original Assignee
Metersit S.R.L.
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 Metersit S.R.L. filed Critical Metersit S.R.L.
Publication of WO2012152560A1 publication Critical patent/WO2012152560A1/fr

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
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow

Definitions

  • a gas meter particularly for high flow rates
  • the present invention relates to a gas meter apparatus having the features described in the preamble to Claim 1, which is the principal claim.
  • the invention relates particularly, but not exclusively, to the field of gas meters designed for remote control of their functionality, which include electronic remote control systems compatible with the regulations of the competent authorities (AEEG Directive 155/08) and in accordance with the current statutes.
  • AEEG Directive 155/08 electronic remote control systems compatible with the regulations of the competent authorities
  • current statutes there is a need to measure gas flows for metrological purposes, not only for meters for domestic use (such as those identified by the symbols G4/G6 in the Italian regulatory system), but also for high flow rate industrial meters (identified by the symbols G10, G16, G25, G40, and so on, where for example G25 denotes flow rates of up to 48,000 litres per hour).
  • the measurement methods are typically based solely on volumetric principles, and the meters make use of two main technologies, namely the deformable wall and the rotary technology.
  • the measurements are subject to errors of approximation arising from variations of pressure and temperature, making it necessary to use additional volume correctors which for pressure and temperature compensation, and requiring the use of corresponding pressure and temperature sensors.
  • the known solutions are highly sensitive to disturbances caused by asymmetrical constrictions (typically found in valves) in the gas conduit, especially if they are present in the proximity of the sensor (typically in the vicinity of the outlet neck of the meter), this limitation being mainly due to the high energy of the flow.
  • the principal object of the invention is that of providing a gas meter apparatus whose structural and functional design is such that the limitations of the aforementioned prior art can be overcome.
  • Figure 1 is a schematic sectional view of a meter apparatus made according to the invention.
  • Figure 2 is a cross-sectional view taken along the line II-II of Figure 1; and Figure 3 is a view corresponding to that of Figure 1, in a variant embodiment of the invention.
  • the number 1 indicates the whole of a gas meter apparatus made according to the present invention and illustrated schematically in axial section. It is designed particularly for use as a remote control gas meter suitable for the measurement of high flow rates such as those normally found in an industrial setting.
  • the meter comprises a boxlike casing 2, preferably made of metallic material, in which are provided an inlet section 3 and an outlet section 4 for the flow of gas.
  • These inlet and outlet sections are conveniently made in the form of cylindrical sleeves or necks with appropriate threaded connectors which can be fixed in a gas-tight way in corresponding through holes formed in a wall 2a of the boxlike casing.
  • the sections 3 and 4 have principal axes (defining the directions of inflow and outflow of gas to and from the meter) indicated by 3' and 4' respectively, these axes being parallel and spaced apart from each other.
  • the meter also comprises a device for measuring the flow of gas supplied, indicated as a whole by 5, which comprises a thermal mass flow sensor 6 in an adaptor casing 7.
  • the sensor, with its casing 7, is located at one end 8a of an auxiliary conduit 8 which extends within the casing 2 and which is connected, at its opposite end 8b, to the outlet section 4 of the meter.
  • the sensor and the conduit 8 are designed to allow the passage through them of a predetermined part, denoted P, of the total flow Q of gas supplied at the outlet section 4 of the meter.
  • Part P of the flow which represents a calculable and specifiable percentage of the flow Q, is therefore correlated with the total flow, and consequently the supplied flow Q, indicative of the gas consumption, is determined on the basis of the measurement made by the sensor 6 (which measures part P of the flow), in accordance with the correlation between this part P of the flow and the total flow Q.
  • the conduit 8 also opens at its end 8b into the outlet section 4 of the meter, thus forming part of the section 4.
  • the passage cross section of the end 8b of the conduit forms a part of the width of the whole outlet section 4 of the meter, the correlation between these widths reflecting the correlation ratio between part P of the flow and the total flow Q.
  • the end 8b of the conduit 8 is circular in shape and is coaxial with the outlet section 4 which is also circular.
  • the number 10 indicates spacer elements, conveniently made in the form of radial appendages, shown purely schematically in Figure 2, for supporting the conduit 8 in a centred and coaxial way in the outlet section 4 of the meter.
  • four appendages 10 are provided, spaced at regular angular intervals, but a different number and corresponding arrangement could be provided for the purpose of supporting the conduit 8 in the area of the outlet section 4.
  • the sensor 6 housed in its adaptor casing 7 is positioned at the end 8a of the conduit 8 so as to be remote from the area close to the outlet section 4, thus substantially reducing the effects caused by the high energy of the flow present in the section 4 on the measurements made by the sensor 8, and therefore attenuating the disturbing action of the flow on the sensor 8.
  • the adaptor casing 7 associated with the sensor 8 means can conveniently be provided to create a laminar flow of gas and isolate or in any case protect the sensor 6 from the turbulence of the flow.
  • an electronic circuit board (not shown), suitably connected to the sensor 6 through connections 11, for implementing the metrological application functions (such as acquisition of measurements, their processing according to the corresponding load curves and consolidation into bands, tariff programs, and the like) and for communicating with the remote control acquisition system based on ordinary mobile communications technology (GSM, GPRS, UMTS, and the like).
  • Figure 3 shows a variant of the invention which differs from the preceding example mainly in that a by-pass conduit 12 is provided on the auxiliary conduit 8, the by-pass conduit being connected in fluid communication with the conduit 8 by means of a section 12a which is upstream and a section 12b which is downstream relative to the direction of the flow through the conduit 8.
  • the flow sensor 6 is fitted in the by-pass portion 12 between the sections 12a and 12b, and is suitably designed to provide a measurement of the flow passing through the conduit 8 by determining the flow passing through the by-pass 12.
  • the conduit 8 can be provided, in the portion between sections 12a and 12b, with flow straightener devices adapted to ensure the accuracy and reliability of the measurements made by the sensor.
  • the meter according to the invention is designed to measure flows and consequently high consumption levels on the basis of an accurate and reliable measurement of smaller flows, these smaller flows being obtained from an auxiliary conduit in which the sensor is located, the sensor and the corresponding conduit being selected so as to allow a known and specifiable percentage of the total flow to pass through them.
  • the invention also enables greater robustness and reliability of measurement to be achieved when there are perturbations in the flow, since a sensor designed to measure only a proportion of the total flow will only be affected by a corresponding proportion of the energy of the flow.
  • a further important advantage is that the ratio between pressure drop and flow rate can be utilized more efficiently in a sensor of this type which is affected by only a proportion of the total main flow.
  • the meter apparatus according to the invention thus achieves the proposed objects, overcomes the drawbacks of the known solutions, and yields the benefits stated above.

Landscapes

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

Abstract

L'invention porte sur un appareil de compteur de gaz, en particulier pour grands débits, qui comprend une enveloppe (2) en forme de boîte ayant une section d'entrée (3) et une section de sortie (4) pour le courant de gaz et comprenant un dispositif (5) pour mesurer le courant de gaz qui passe à travers le compteur, le dispositif de mesure (5) comprenant un détecteur de flux massique (6) placé à l'intérieur de l'enveloppe, à travers lequel passe une partie prédéterminée (P) du flux total (Q) débité sur la section de sortie (4) du compteur, la partie prédéterminée du courant étant corrélée au flux total de telle sorte que le flux total fourni, qui est indicatif de la consommation de gaz, est déterminé sur la base de la mesure qui est exécutée par le détecteur de débit massique (6) sur la base de la corrélation existant entre la partie prédéterminée (P) du flux et le flux total (Q).
PCT/EP2012/057175 2011-05-12 2012-04-19 Compteur de gaz, en particulier pour grand débits WO2012152560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000148A ITPD20110148A1 (it) 2011-05-12 2011-05-12 Contatore per gas, particolarmente per portate elevate
ITPD2011A000148 2011-05-12

Publications (1)

Publication Number Publication Date
WO2012152560A1 true WO2012152560A1 (fr) 2012-11-15

Family

ID=44554510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/057175 WO2012152560A1 (fr) 2011-05-12 2012-04-19 Compteur de gaz, en particulier pour grand débits

Country Status (2)

Country Link
IT (1) ITPD20110148A1 (fr)
WO (1) WO2012152560A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3296704A1 (fr) 2016-09-16 2018-03-21 Energoflow AG Debimetre
DE102016117478A1 (de) 2016-09-16 2018-03-22 Energoflow Ag Fluidzähler
IT201900023772A1 (it) * 2019-12-12 2021-06-12 Pietro Fiorentini Spa Dispositivo per regolare il passaggio del gas

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297426A (en) * 1993-04-07 1994-03-29 Abb K-Flow Inc. Hydrodynamic fluid divider for fluid measuring devices
US5347874A (en) * 1993-01-25 1994-09-20 Micro Motion, Incorporated In-flow coriolis effect mass flowmeter
US5861561A (en) * 1996-01-17 1999-01-19 Micro Motion, Inc. Bypass type coriolis effect flowmeter
US5975126A (en) * 1996-10-04 1999-11-02 Emerson Electric Co. Method and apparatus for detecting and controlling mass flow
US20030234039A1 (en) * 2002-06-24 2003-12-25 Ali Shajii Apparatus and method for pressure fluctuation insensitive mass flow control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347874A (en) * 1993-01-25 1994-09-20 Micro Motion, Incorporated In-flow coriolis effect mass flowmeter
US5297426A (en) * 1993-04-07 1994-03-29 Abb K-Flow Inc. Hydrodynamic fluid divider for fluid measuring devices
US5861561A (en) * 1996-01-17 1999-01-19 Micro Motion, Inc. Bypass type coriolis effect flowmeter
US5975126A (en) * 1996-10-04 1999-11-02 Emerson Electric Co. Method and apparatus for detecting and controlling mass flow
US20030234039A1 (en) * 2002-06-24 2003-12-25 Ali Shajii Apparatus and method for pressure fluctuation insensitive mass flow control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3296704A1 (fr) 2016-09-16 2018-03-21 Energoflow AG Debimetre
WO2018050803A1 (fr) 2016-09-16 2018-03-22 Energoflow Ag Compteur de fluide
DE102016117478A1 (de) 2016-09-16 2018-03-22 Energoflow Ag Fluidzähler
IT201900023772A1 (it) * 2019-12-12 2021-06-12 Pietro Fiorentini Spa Dispositivo per regolare il passaggio del gas
EP3835735A1 (fr) * 2019-12-12 2021-06-16 Pietro Fiorentini S.P.A. Dispositif de régulation de passage du gaz

Also Published As

Publication number Publication date
ITPD20110148A1 (it) 2012-11-13

Similar Documents

Publication Publication Date Title
CN109891201B (zh) 流体计量器
US8596141B2 (en) Vortex flow meter with vortex oscillation sensor plate
CN104114982A (zh) 用于实时地监测穿过质量流量控制器的流量的系统和方法
US9422953B2 (en) Flow measuring device for measuring a parameter of a flow formed from a fluid
GB2432220A (en) Attitude error self-correction for thermal sensors of mass flow meters and controllers
EP2318814A2 (fr) Mesures de débit affinées à l aide de la vitesse
US8910527B2 (en) Vortex flowmeter with optimized temperature detection
CN201007664Y (zh) 霍尔流量传感器
CN102455368A (zh) 流速的超声测量
CN104061973B (zh) 流量计
US11555721B2 (en) Flow meter including a combined ultrasonic flow sensing arrangement and a non-ultrasonic flow sensor arrangement for measuring wide range of flow rates
CN106104402B (zh) 提供压力不敏感自我验证的质量流量控制器的系统和方法
CN103591994B (zh) 一种不受环境因素影响的高精度流量测量装置
WO2012152560A1 (fr) Compteur de gaz, en particulier pour grand débits
US20140174197A1 (en) Sensor module measuring and/or monitoring parameters of media flowing in pipelines and measuring system formed therewith
CN104132716B (zh) 车载式油流量标准装置
EP2948742B1 (fr) Plaque à orifice rotative pour mesure d'écoulement directe
JPH11183228A (ja) ガスメータ
KR100436972B1 (ko) 유량계의 표준화 교정용 기체유량측정장치
CN203587156U (zh) 一种不受环境因素影响的高精度流量测量装置
KR101305538B1 (ko) 유량 및 물성 측정 시스템
EP2074386B1 (fr) Capteur électrocinétique de pression / de débit
KR102615895B1 (ko) 터빈식 역과방지 유량계
AU2010101253B4 (en) Testable water meter
KR20000065545A (ko) 액체용 유동자식 유량계

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: 12714721

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: 12714721

Country of ref document: EP

Kind code of ref document: A1