CA2567284A1 - Restriction flowmeter - Google Patents

Restriction flowmeter Download PDF

Info

Publication number
CA2567284A1
CA2567284A1 CA002567284A CA2567284A CA2567284A1 CA 2567284 A1 CA2567284 A1 CA 2567284A1 CA 002567284 A CA002567284 A CA 002567284A CA 2567284 A CA2567284 A CA 2567284A CA 2567284 A1 CA2567284 A1 CA 2567284A1
Authority
CA
Canada
Prior art keywords
primary
measuring tube
tube
pressure outlet
restrictor
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.)
Granted
Application number
CA002567284A
Other languages
French (fr)
Other versions
CA2567284C (en
Inventor
Kenji Yao
Nobutaka Chimura
Hiroyuki Mutoh
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.)
Azbil Corp
Original Assignee
Yamatake Corporation
Kenji Yao
Nobutaka Chimura
Hiroyuki Mutoh
Azbil Corporation
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 Yamatake Corporation, Kenji Yao, Nobutaka Chimura, Hiroyuki Mutoh, Azbil Corporation filed Critical Yamatake Corporation
Publication of CA2567284A1 publication Critical patent/CA2567284A1/en
Application granted granted Critical
Publication of CA2567284C publication Critical patent/CA2567284C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01F1/34—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 measuring pressure or differential pressure
    • G01F1/50—Correcting or compensating means
    • 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
    • G01F1/34—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 measuring pressure or differential pressure
    • G01F1/36—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 measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/44—Venturi tubes

Abstract

A restriction flowmeter, comprising a measuring tube (31) having two members, that are, a primary measuring tube (31A) and a secondary measuring tube (31B).
The primary measuring tube (31A) comprises a primary pressure outlet (4) and is flange-connected to a bent tube (21) after being angularly adjusted around its axis relative to the secondary measuring tube (31B). By this angular adjustment of the primary measuring tube (31A), the general average height of the primary pressure (PH) of measured fluid (7) near the primary pressure outlet (4) is allowed to generally match the height of the primary pressure outlet (4). Since the average height of the primary pressure (PH) of the measured fluid (7) near the primary pressure outlet (4) when the primary measurement tube (31A) is connected to the bent tube (21) is generally equal to the center height of the primary measurement tube (31A), the primary measuring tube (31A) is connected to the secondary measuring tube (31B) in the state of the primary pressure outlet (4) facing just sideways. The secondary measurement tube (31B) comprises a restrictor (3) and the secondary pressure outlet (5), and is flange-connected to a horizontal tube (20B) in the state of the secondary pressure outlet (5) facing upward.

Claims (3)

1. A restrictor flowmeter characterized by comprising a measuring tube through which a measurement fluid is to flow, wherein said measuring tube comprises a primary measuring tube and a secondary measuring tube that are divisionally formed, the primary measuring tube having a primary pressure outlet and the secondary measuring tube having a secondary pressure outlet and a restrictor, and the primary measuring tube connects to the secondary measuring tube to be angularly adjustable about an axis.
2. A restrictor flowmeter according to claim 1, characterized in that said primary measuring tube connects to downstream of a bent tube, and connects to said secondary measuring tube, after being angularly adjusted about the axis, such that a height of the primary pressure outlet substantially coincides with that of an average primary pressure of the measurement fluid which flows near said primary pressure outlet.
3. A restrictor flowmeter according to claim 1 or 2, characterized in that a restrictor arranged in said secondary measuring tube is any one of a Venturi tube, an elliptic restrictor, and a restrictor member having a bombshell shape.
CA2567284A 2004-06-07 2004-06-07 Restriction flowmeter Expired - Fee Related CA2567284C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/007931 WO2005121715A1 (en) 2004-06-07 2004-06-07 Restriction flowmeter

Publications (2)

Publication Number Publication Date
CA2567284A1 true CA2567284A1 (en) 2005-12-22
CA2567284C CA2567284C (en) 2012-10-09

Family

ID=35503179

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2567284A Expired - Fee Related CA2567284C (en) 2004-06-07 2004-06-07 Restriction flowmeter

Country Status (2)

Country Link
CA (1) CA2567284C (en)
WO (1) WO2005121715A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105698877B (en) * 2016-01-22 2018-11-30 重庆赫皇科技咨询有限公司 A kind of fluids within pipes flow rate measuring system and method
JP2019196785A (en) * 2018-05-08 2019-11-14 株式会社日立製作所 Swirl flow adjustment device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5631607A (en) * 1979-08-23 1981-03-31 Nippon Steel Corp Venturi tube
JPH1096656A (en) * 1996-09-24 1998-04-14 Oval Corp Vapor and liquid two-phase flow meter
JP3122984B2 (en) * 1996-11-29 2001-01-09 株式会社山武 Throttle flow meter
JP3182719B2 (en) * 1997-03-14 2001-07-03 株式会社山武 Throttle mechanism of throttle flow meter
JP2002372444A (en) * 2001-06-14 2002-12-26 Mitsubishi Heavy Ind Ltd Flow rate measuring pressure detector and its manufacturing method

Also Published As

Publication number Publication date
CA2567284C (en) 2012-10-09
WO2005121715A1 (en) 2005-12-22

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MKLA Lapsed

Effective date: 20160607