CN102944271A - Composite internal and external venturi tube flowmeter - Google Patents

Composite internal and external venturi tube flowmeter Download PDF

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Publication number
CN102944271A
CN102944271A CN2012104894644A CN201210489464A CN102944271A CN 102944271 A CN102944271 A CN 102944271A CN 2012104894644 A CN2012104894644 A CN 2012104894644A CN 201210489464 A CN201210489464 A CN 201210489464A CN 102944271 A CN102944271 A CN 102944271A
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CN
China
Prior art keywords
venturi
flowmeter
venturi tube
measuring tube
tube 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.)
Pending
Application number
CN2012104894644A
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Chinese (zh)
Inventor
唐力南
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.)
YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD)
Original Assignee
YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD)
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 YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD) filed Critical YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD)
Priority to CN2012104894644A priority Critical patent/CN102944271A/en
Publication of CN102944271A publication Critical patent/CN102944271A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an automatic flow measurement meter, in particular to a composite internal and external venturi tube flowmeter which comprises a measurement pipe and a flange matched at one end of the measurement pipe. The composite internal and external venturi tube flowmeter is characterized in that the measurement pipe is formed by a venturi contraction section, a venturi throat portion and a venture diffusing section in assembling mode, and a cone-shaped throttling element is matched in the measurement pipe. The venturi contraction section and the venture diffusing section are fully symmetrical relative to the center of the venturi throat portion. The composite internal and external venturi tube flowmeter is unique in structure, high in linearity, good in repeatability, high in accuracy, low in needed straight pipe and wide in flow measurement range, and greatly reduces use cost.

Description

The inside and outside differential pressure type flowmeter of combined type
Technical field
The present invention relates to a kind of flow measurement instrument and meter for automation, especially relate to the inside and outside differential pressure type flowmeter of a kind of combined type.
Background technology
In flow measurement instrument and meter for automation industry, existing market only has conventional V-type cone flow meter and differential pressure type flowmeter, although and the V-type cone flow meter of this routine and the required straight length of differential pressure type flowmeter are shorter, but the Venturi meter volume is larger, installation cost is higher, the more important thing is that existing flowmeter is difficult to solve low flow velocity, the low reynolds number fluid is difficult to accurately measure this difficult problem.
Summary of the invention
The object of the invention is to overcome the defective of above-mentioned prior art, provide that a kind of structure is unique, the linearity is high, good reproducibility, high, the required straight length of precision be low, greatly reduces use cost, the wide inside and outside differential pressure type flowmeter of a kind of combined type of flow measurement range.
The present invention realizes in the following way:
The inside and outside differential pressure type flowmeter of a kind of combined type, comprise the flange that a measuring tube and measuring tube one end cooperate, it is characterized in that: this measuring tube is to be assembled by venturi contraction section, venturi throat, venturi diffuser, is combined with the restricting element of a cone-shaped body in measuring tube;
Described venturi contraction section and venturi diffuser are with respect to the center full symmetric of described venturi throat.
The present invention has following effect:
1) structure is unique: flowmeter provided by the invention comprises the flange that a measuring tube and measuring tube one end cooperate, it is characterized in that: this measuring tube is to be assembled by venturi contraction section, venturi throat, venturi diffuser, is combined with the restricting element of a cone-shaped body in measuring tube; Described venturi contraction section and venturi diffuser are with respect to the center full symmetric of described venturi throat.
2) high, the good reproducibility of the linearity, precision are high: the restricting element of flowmeter provided by the invention is a cone body, and measuring tube is the venturi form, can carry out balance and dual rectification by stream field, greatly reduce eddy current, vibration and signal noise, flowing field stability obviously improves, and the linearity, repeatability and precision are greatly improved.
3) required straight length is low, greatly reduce use cost: flowmeter provided by the invention is because restricting element is cone-shaped body, itself just has the self-rectifying effect, add the contraction of Venturi meter, so that the rectification effect of flowmeter is better, the evidence upstream and downstream need not straight length, just can guarantee measuring accuracy.
4) flow measurement range is wide: according to experimental result, the measurable flow of flowmeter provided by the invention rolls off the production line very low, particularly low flow velocity, low reynolds number fluid are the difficult problems that flow instrument is measured always, the inside and outside differential pressure type flowmeter of combined type has solved this difficult problem, it can satisfy the Measurement accuracy of low discharge scope, thus the Effective Raise flow measurement range.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The inside and outside differential pressure type flowmeter of a kind of combined type, comprise the flange 6 that a measuring tube 1 and measuring tube 1 one ends cooperate, as shown in Figure 1: this measuring tube 1 is to be assembled by venturi contraction section 2, venturi throat 3, venturi diffuser 4, is combined with the restricting element 5 of a cone-shaped body in measuring tube 1.
Described venturi contraction section 2 and venturi diffuser 4 are with respect to the center full symmetric of described venturi throat 3.
The inside and outside differential pressure type flowmeter of a kind of combined type provided by the invention is a kind of differential pressure type flow measurement sensor, and it and differential pressure transmitter etc. support the use.Be mainly used in measuring the flow of fluid of pipeline of flowing through.Flow is through throttling element 5, and a fluid stream shrinks, so that rate of flow of fluid increases, pressure decreased, producing Pressure Drop in the front and back of throttling element 5 is differential pressure, and this differential pressure has certain relation with the flow of the pipeline of flowing through, and namely just can obtain the flow of pipeline inner fluid by measuring this differential pressure.Measuring differential pressure can realize with differential pressure transmitter.

Claims (2)

1. the inside and outside differential pressure type flowmeter of a combined type, comprise the flange (6) that a measuring tube (1) and measuring tube (1) one end cooperate, it is characterized in that: this measuring tube (1) is to be assembled by venturi contraction section (2), venturi throat (3), venturi diffuser (4), is combined with the restricting element (5) of a cone-shaped body in measuring tube (1).
2. the inside and outside differential pressure type flowmeter of combined type as claimed in claim 1, it is characterized in that: described venturi contraction section (2) and venturi diffuser (4) are with respect to the center full symmetric of described venturi throat (3).
CN2012104894644A 2012-11-27 2012-11-27 Composite internal and external venturi tube flowmeter Pending CN102944271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012104894644A CN102944271A (en) 2012-11-27 2012-11-27 Composite internal and external venturi tube flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012104894644A CN102944271A (en) 2012-11-27 2012-11-27 Composite internal and external venturi tube flowmeter

Publications (1)

Publication Number Publication Date
CN102944271A true CN102944271A (en) 2013-02-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012104894644A Pending CN102944271A (en) 2012-11-27 2012-11-27 Composite internal and external venturi tube flowmeter

Country Status (1)

Country Link
CN (1) CN102944271A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105067049A (en) * 2015-07-21 2015-11-18 西安交通大学 Differential pressure type flow measuring device based on rotational flow principle and method
CN107202613A (en) * 2016-03-16 2017-09-26 罗斯蒙特公司 Flow Measuring System for disposable container

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08285645A (en) * 1995-04-13 1996-11-01 Mitsubishi Heavy Ind Ltd Double venturi type current meter
US6352001B1 (en) * 1999-08-30 2002-03-05 General Electric Company Non-iterative method for obtaining mass flow rate
CN101017106A (en) * 2007-02-14 2007-08-15 大连亨利测控仪表工程有限公司 Vencore flowmeter
CN101178347A (en) * 2007-11-15 2008-05-14 天津大学 Narrow slit Venturi throttling set and gas-liquid two-phase flow measuring system
CN201173794Y (en) * 2008-03-11 2008-12-31 杭州华达诺自动化设备有限公司 Integral concealed Venturi
CN101382445A (en) * 2008-09-17 2009-03-11 天津大学 Double differential pressure throttle moisture measuring device
CN202956151U (en) * 2012-11-27 2013-05-29 银川融神威自动化仪表厂(有限公司) Combined type inside and outside Venturi tube

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08285645A (en) * 1995-04-13 1996-11-01 Mitsubishi Heavy Ind Ltd Double venturi type current meter
US6352001B1 (en) * 1999-08-30 2002-03-05 General Electric Company Non-iterative method for obtaining mass flow rate
CN101017106A (en) * 2007-02-14 2007-08-15 大连亨利测控仪表工程有限公司 Vencore flowmeter
CN101178347A (en) * 2007-11-15 2008-05-14 天津大学 Narrow slit Venturi throttling set and gas-liquid two-phase flow measuring system
CN201173794Y (en) * 2008-03-11 2008-12-31 杭州华达诺自动化设备有限公司 Integral concealed Venturi
CN101382445A (en) * 2008-09-17 2009-03-11 天津大学 Double differential pressure throttle moisture measuring device
CN202956151U (en) * 2012-11-27 2013-05-29 银川融神威自动化仪表厂(有限公司) Combined type inside and outside Venturi tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105067049A (en) * 2015-07-21 2015-11-18 西安交通大学 Differential pressure type flow measuring device based on rotational flow principle and method
CN105067049B (en) * 2015-07-21 2018-07-27 西安交通大学 A kind of differential pressure type flow meter and method based on eddy flow principle
CN107202613A (en) * 2016-03-16 2017-09-26 罗斯蒙特公司 Flow Measuring System for disposable container

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Application publication date: 20130227