CN102023037B - Non-full pipe electromagnetic flowmeter - Google Patents

Non-full pipe electromagnetic flowmeter Download PDF

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Publication number
CN102023037B
CN102023037B CN2010105572009A CN201010557200A CN102023037B CN 102023037 B CN102023037 B CN 102023037B CN 2010105572009 A CN2010105572009 A CN 2010105572009A CN 201010557200 A CN201010557200 A CN 201010557200A CN 102023037 B CN102023037 B CN 102023037B
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CN
China
Prior art keywords
pipeline
circulation duct
full pipe
coil
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.)
Expired - Fee Related
Application number
CN2010105572009A
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Chinese (zh)
Other versions
CN102023037A (en
Inventor
邵思
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.)
Shanghai HQ Instruments Co Ltd
SHANGHAI HUAQIANG FULUO INSTRUMENT CO Ltd
Original Assignee
Shanghai HQ Instruments Co Ltd
SHANGHAI HUAQIANG FULUO INSTRUMENT 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 Shanghai HQ Instruments Co Ltd, SHANGHAI HUAQIANG FULUO INSTRUMENT CO Ltd filed Critical Shanghai HQ Instruments Co Ltd
Priority to CN2010105572009A priority Critical patent/CN102023037B/en
Publication of CN102023037A publication Critical patent/CN102023037A/en
Application granted granted Critical
Publication of CN102023037B publication Critical patent/CN102023037B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention provides a non-full pipe electromagnetic flowmeter which comprises a body pipeline arranged on an on-site pipeline, an excitation coil and eccentric flanges. The inner of the body pipeline is provided with a circulation pipeline; the circulation pipeline and the two ends of the body pipeline are welded on eccentric flanges; the center of the circulation pipeline is positioned under the center of eccentric flanges with a distance ranging from 1/8 D to 1/6 D, wherein the D is the caliber of the body pipeline. The present invention achieves the advantages of reducing fluid circulation areas in non-full pipe occasions through the structures of both eccentric flanges and the circulation pipeline, positioning at the part of the body pipeline and completely converting the non-full pipe flow measurement into to full pipe flow measurement in application, with same use method with the traditional electromagnetic flow-meters. The invention also has a simple and reliable structure, and can guarantee a high-precision of 0.5 grades.

Description

A kind of non-full pipe electromagnetic flowmeter
Technical field
The present invention relates to a kind of electromagnetic flowmeter instrument, particularly disclose a kind of non-full pipe electromagnetic flowmeter.
Background technology
The traditional electrical magnetic flowmeter can only carry out flow measurement to full-section pipe-flow, and on-the-spot actual condition is comparatively complicated, is mostly the non-full pipe situation, and especially in large diameter pipeline occasions such as municipal water supply and environment protection sewage processing, the non-full pipe operating mode is more general.In these application scenarios because accurate metered flow has caused very big economic loss to enterprise.
Be to solve the bottleneck that the traditional electrical magnetic flowmeter is measured in the non-full pipe occasion, each producer non-full pipe electromagnetic flowmeter that released one after another, measuring channel inner fluid height and then obtain circulation area when its universal principle is measurement flow rate, both multiply each other and obtain flow.This kind type structure is comparatively complicated in manufacturing process, relates to a plurality of detections and surveys element, has increased the potential leakage point and the potential maintenance of instrument itself; In addition; The precision of liquid level measuring system is lower, influences the overall accuracy of flowmeter, generally is merely 2 class precisions.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, provide a kind of simple in structure, easy-to-use stable, can measuring liquid level greater than the non-full pipe electromagnetic flowmeter of the non-full pipe flow of 30% diameter height.
The present invention is achieved in that a kind of non-full pipe electromagnetic flowmeter; Comprise the body pipeline, the field coil that are installed on the on-the-spot pipeline; It is characterized in that: also comprise eccentric flange, be provided with circulation duct in the said body pipeline, the two ends weldering of said circulation duct and body pipeline is connected on the eccentric flange; Said circulation duct is centered close to the 1/8D ~ 1/6D place of eccentric flange central lower, and wherein D is the body pipe diameter.Said eccentric flange, body pipeline and the circulation duct externally company of weldering form a confined space.
The bore of said circulation duct is 1/2 of a body pipe diameter.
Be provided with field coil between said body pipeline and the circulation duct; Said field coil is divided into field coil, following field coil, and is individually fixed on the upper and lower outer wall of circulation duct.
The center, tube wall both sides of said circulation duct is provided with induction electrode.
The lateral surface of said eccentric flange is provided with groove, and said body pipe ends embeds in the groove.
Said field coil is fixed on the outer wall of circulation duct through rivet.
The invention has the beneficial effects as follows: the structure through eccentric flange and circulation duct is dwindled the fluid flow area in the non-full pipe occasion; And be positioned at body pipeline the latter half; Fully non full package flow measurement is converted into the full packages flow measurement during application; With the traditional electrical magnetic flowmeter in the use and indistinction, physical construction is simple and reliable, and can guarantee 0.5 grade high precision.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the right view of Fig. 1.
Wherein: 1, body pipeline; 2, circulation duct; 3, field coil; 4, induction electrode; 5, eccentric flange; 6, groove; 7, rivet; 8, outer wall.
Embodiment
According to Fig. 1, Fig. 2, the present invention includes the body pipeline 1, circulation duct 2, eccentric flange 5, field coil 3, the induction electrode 4 that are installed on the on-the-spot pipeline.The lateral surface of said eccentric flange 5 is provided with groove 6, and said body pipeline 1 two ends embed in the groove 6.Be provided with circulation duct 2 in the said body pipeline 1, said circulation duct 2 is connected on the eccentric flange 5 with the two ends weldering of body pipeline 1, and said circulation duct 2 is centered close to the 1/8D ~ 1/6D place of eccentric flange 5 central lower, and wherein D is the body pipe diameter.Said eccentric flange 5, body pipeline 1 and the circulation duct 2 externally company of weldering form a confined space.The bore of said circulation duct 2 is 1/2 of body pipeline 1 bore.Be provided with field coil 3 between said body pipeline 1 and the circulation duct 2; Said field coil 3 is divided into field coil, following field coil, and is individually fixed on the upper and lower outer wall 8 of circulation duct 2; Said field coil 3 is fixed on the outer wall 8 of circulation duct 2 through rivet 7.The center, tube wall both sides of said circulation duct 2 is provided with induction electrode 4, is used for the induction electromotive force that test fluid produces through the flowmeter cutting magnetic induction line.
According to Faraday's electromagnetic induction law:
E=KBDV
Wherein, E: the induction electromotive force that records; K: instrument coefficient; B: magnetic induction density; D: pipe diameter; V: rate of flow of fluid.Through the induction electromotive force that records, calculating can obtain rate of flow of fluid, and then obtains the detected fluid flow.
The present invention can measuring liquid level greater than the non-full pipe flow of 30% body pipe diameter height, reason is following: the present invention can measure non-full pipe flow, is based on the non-full pipe measurement is converted into principle that full packages measures, therefore must guarantee the circulation duct full packages.Guarantee full packages, must make that liquid level is higher than certain altitude in the tested pipeline.Based on the principle of the integration of liquid level on body pipeline cross-sectional area, calculate and to guarantee that the liquid level of measuring is about 30% tested pipeline diameter height more than or equal to the circulation duct cross-sectional area.

Claims (6)

1. non-full pipe electromagnetic flowmeter; Comprise the body pipeline, the field coil that are installed on the on-the-spot pipeline; It is characterized in that: also comprise eccentric flange, be provided with circulation duct in the said body pipeline, the two ends weldering of said circulation duct and body pipeline is connected on the eccentric flange; Said circulation duct is centered close to the 1/8D ~ 1/6D place of eccentric flange central lower, and wherein D is the body pipe diameter.
2. according to the described a kind of non-full pipe electromagnetic flowmeter of claim 1, it is characterized in that: the bore of said circulation duct is 1/2 of a body pipe diameter.
3. according to the described a kind of non-full pipe electromagnetic flowmeter of claim 1, it is characterized in that: be provided with field coil between said body pipeline and the circulation duct; Said field coil is divided into field coil, following field coil, and is individually fixed on the upper and lower outer wall of circulation duct.
4. according to claim 1 or 3 described a kind of non-full pipe electromagnetic flowmeters, it is characterized in that: the center, tube wall both sides of said circulation duct is provided with induction electrode.
5. according to the described a kind of non-full pipe electromagnetic flowmeter of claim 1, it is characterized in that: the lateral surface of said eccentric flange is provided with groove, and said body pipe ends embeds in the groove.
6. a kind of non-full pipe electromagnetic flowmeter according to claim 3, it is characterized in that: said field coil is fixed on the outer wall of circulation duct through rivet.
CN2010105572009A 2010-11-24 2010-11-24 Non-full pipe electromagnetic flowmeter Expired - Fee Related CN102023037B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105572009A CN102023037B (en) 2010-11-24 2010-11-24 Non-full pipe electromagnetic flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105572009A CN102023037B (en) 2010-11-24 2010-11-24 Non-full pipe electromagnetic flowmeter

Publications (2)

Publication Number Publication Date
CN102023037A CN102023037A (en) 2011-04-20
CN102023037B true CN102023037B (en) 2012-01-04

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105333893A (en) * 2014-08-12 2016-02-17 丹东东方测控技术股份有限公司 Structure device applied to self-flowing type fluid ultrasonic measurement
CN109186698B (en) * 2018-11-09 2020-06-16 合肥工业大学 Electromagnetic water meter transmitter with intermittent excitation and digital signal processing
CN110657848B (en) * 2019-10-18 2020-10-09 恩乐曼仪表(徐州)有限公司 Ultrasonic flow meter with self-adjusting fluid section

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2449199Y (en) * 2000-11-21 2001-09-19 陈宝荣 Intelligent electromagnetic flow meter
CN101699226A (en) * 2009-11-02 2010-04-28 北京航空航天大学 Electromagnetic flowmeter for non-full pipe flow measurement
CN101701836A (en) * 2009-11-02 2010-05-05 北京航空航天大学 Capacitive electromagnetic flow meter used for non full package flow measurement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3337118B2 (en) * 1997-02-10 2002-10-21 富士電機株式会社 Electromagnetic flow meter
JPH11241932A (en) * 1998-02-25 1999-09-07 Toshiba Corp Non-full water electromagnetic flowmeter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2449199Y (en) * 2000-11-21 2001-09-19 陈宝荣 Intelligent electromagnetic flow meter
CN101699226A (en) * 2009-11-02 2010-04-28 北京航空航天大学 Electromagnetic flowmeter for non-full pipe flow measurement
CN101701836A (en) * 2009-11-02 2010-05-05 北京航空航天大学 Capacitive electromagnetic flow meter used for non full package flow measurement

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开平10-221135A 1998.08.21
JP特开平11-241932A 1999.09.07

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