CN2449199Y - Intelligent electromagnetic flow meter - Google Patents
Intelligent electromagnetic flow meter Download PDFInfo
- Publication number
- CN2449199Y CN2449199Y CN 00253017 CN00253017U CN2449199Y CN 2449199 Y CN2449199 Y CN 2449199Y CN 00253017 CN00253017 CN 00253017 CN 00253017 U CN00253017 U CN 00253017U CN 2449199 Y CN2449199 Y CN 2449199Y
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- Prior art keywords
- flow
- flow meter
- tube
- nominal diameter
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- Expired - Lifetime
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- 239000012530 fluid Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
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Abstract
The utility model relates to an intelligent flow meter. A flow tube of the intelligent flow meter is changed from a straight tube into a venturitube, namely the middle part is of the flow tube is straight tube, and both side parts of the flow tube are symmetrical and conical tubes, wherein, the diameter of the section of the straight tube is 0.3-0.9 times of the nominal diameter, and the length of the section of the straight tube is 0.5-3 times of the nominal diameter. The range of a cone angle is 5 DEG-65 DEG. The maximum diameter of each of the conical tube is the nominal diameter. The measuring range of the flow meter is increased by adopting the structure. The lower limit of flow is enabled to be decreased. The measuring range of an improved electromagnetic flow meter is increased from the original 20/1 to 80/1. Particularly, the improved electromagnetic flow meter can realize accurate metering to partial non-full tubes after the tubes are full. The utility model meets the requirement of users for carrying out metering small flow and the non-full tubes or unstable flow.
Description
The intelligent electric magnetic flowmeter is a kind of Ferraris instrument of measuring the conducting medium volumetric flow rate of developing along with the fast development of Based Intelligent Control and detection technique in recent years.It not only can measure the flow of general conducting liquid, can also measure the volumetric flow rate of solid-liquid two-phase suspending liquid such as corrosive liquids such as strong acid, highly basic, salt and mud, paper pulp, ore pulp, coal water mixture, effluent sewage.Because of sensor adopts the Faradic electricity magnetic induction principle, there is not movable member in the measuring tube, medium through flowmeter does not have the pressure loss, the measuring accuracy advantages of higher is widely used in the flow metering in fields such as industries such as oil, chemical industry, metallurgy, weaving, food, sugaring, beverage and environmental protection, municipal administration, water conservancy construction, river dredging.
Common its flowtube of intelligent electric magnetic flowmeter is a straight tube, as shown in Figure 1, be with induced voltage by two directly and the fluid electrodes in contact detect, through signal amplification, filtering, Digital Signal Processing, be core by microprocessor CPU, processing is amplified, measured to the effective ingredient that is submerged in the noise, show its flow and integrated flux simultaneously moment.
Intelligent electromagnetic flowmeter is the same with other flowmeter, and the metering of flowmeter also is that the flow class of accuracy of flowmeter, fundamental error just comply with relevant regulations in the flow range of regulation.It measures range ratio is 20: 1, and degree of accuracy is+0.5---± 1%, and the flowtube of flowmeter all must be full of fluid (blank pipe promptly can not be arranged and manage phenomenon in midair) in all time.Because such service condition restriction is arranged, make the use of electromagnetic flowmeter be subjected to very big restriction, particularly long-term work is in the industrial and mining enterprises of the flow measurement range of flux lower limit when non-full pipe (or) and overshoot, it can cause metering inaccurate, also just can not satisfy user's request for utilization.
This novel purpose is: design New Intelligent electromagnetic flowmeter enlarges measurement range to satisfy the request for utilization of more users.
The following structure of this novel employing realizes above-mentioned purpose, with the flowtube of intelligent flowmeter by straight tube change into Venturi tube both in the middle of for the straight tube both sides be the Taper Pipe of symmetry, wherein the diameter of straight length be nominal diameter 0.3---0.9 doubly, the length of straight length is 0.5-3 times of nominal diameter, the cone angle scope is 5 °----65 °, and the maximum gauge of Taper Pipe is a nominal diameter
Adopt as above structure, overcome existing flowmeter requirement signal has been had enough amplifying powers and the ability that overcomes undesired signals such as noise, and require dynamic response good, can when higher magnet excitation frequency, eliminate the shortcoming of zero point drift, can measure accurately that magnetic induction density is little, the flowing velocity of medium is slow or pipeline is the flow of the fluid of non-full pipe; Improved the measurement range of flowmeter, make flux lower limit diminish, electromagnetic flowmeter after the improvement, range ratio can be brought up to 80: 1 by original 20: 1, overcome low discharge has been difficult to measure the shortcoming narrow with range ratio, also can measure exactly after particularly can realizing the part non-full pipe become full packages, satisfy the requirement that the user measures low discharge and non-full pipe or unstable flow.
Illustrate below in conjunction with example:
Fig. 1 is prior art figure
Fig. 2 is this new structure figure
Fig. 3 is the right view of figure
As shown in Figure 1, the flowtube in the prior art 6 is a straight tube.
As shown in Figure 2, be this novel intelligent electromagnetic flowmeter, be by Displaying Meter 2, last lower coil 3 and 5, electrode 4, housing 1, flowtube 6 compositions such as grade, wherein flowtube 6 adopts Venturi tube, both is straight length 8, both sides are the Taper Pipe section 7 of symmetry, the length L of straight length 8 is 0.5---3 a times of nominal diameter DN, the diameter d of straight length 8 is the 0.3---0.9 of nominal diameter, and cone angle is 5 °---65 °, the maximum gauge of Taper Pipe 7 is that nominal diameter DN is identical with the nominal diameter of direct current buret in the prior art, when flow of liquid to be measured through the Electromagnetic Flow timing, because the diameter d of straight length 8 is littler than nominal diameter DN, then can pass through the Venturi principle for low discharge, adopts this new structure to record flow.
The maximum gauge of the Taper Pipe 7 among Fig. 2 is that nominal diameter DN is: 300mm, the length L of straight length 8 is: 220mm, coning angle are 20 °.
Process contrast test (each one of DN300 intelligent electric magnetic flowmeter):
Former electromagnetic flowmeter
Measurement range (medium-water): 100～2000m
3/ h
Range ratio: 20: 1
Degree of accuracy: ± 0.46% adopts the electromagnetic flowmeter of this new structure
Measurement range (medium-water): 20～1600m
3/ h
Range ratio: 80: 1
Degree of accuracy: ± 0.45%
Claims (1)
1. intelligent electromagnetic flowmeter, be by video-stream processor, last lower coil, compositions such as electrode, housing is characterized in that: flowtube adopts the venturi flowtube, both the centre of pipe was a straight length, both sides are the Taper Pipe section of symmetry, wherein the diameter of straight length be nominal diameter 0.3---0.9 doubly, the length of straight length be nominal diameter 0.5---3 doubly, the cone angle scope is 5 °----65 °, and the Taper Pipe maximum gauge is a nominal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00253017 CN2449199Y (en) | 2000-11-21 | 2000-11-21 | Intelligent electromagnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00253017 CN2449199Y (en) | 2000-11-21 | 2000-11-21 | Intelligent electromagnetic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2449199Y true CN2449199Y (en) | 2001-09-19 |
Family
ID=33610550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00253017 Expired - Lifetime CN2449199Y (en) | 2000-11-21 | 2000-11-21 | Intelligent electromagnetic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2449199Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023037A (en) * | 2010-11-24 | 2011-04-20 | 上海华强浮罗仪表有限公司 | Non-full pipe electromagnetic flowmeter |
| CN102080975A (en) * | 2010-12-13 | 2011-06-01 | 昆山市鑫源计测科技有限公司 | Submerged type electromagnetic flow transducer with good corrosion-resisting performance |
| CN107923776A (en) * | 2015-07-28 | 2018-04-17 | 森泰克有限公司 | Electromagnetic flow sensor |
-
2000
- 2000-11-21 CN CN 00253017 patent/CN2449199Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023037A (en) * | 2010-11-24 | 2011-04-20 | 上海华强浮罗仪表有限公司 | Non-full pipe electromagnetic flowmeter |
| CN102023037B (en) * | 2010-11-24 | 2012-01-04 | 上海华强浮罗仪表有限公司 | Non-full pipe electromagnetic flowmeter |
| CN102080975A (en) * | 2010-12-13 | 2011-06-01 | 昆山市鑫源计测科技有限公司 | Submerged type electromagnetic flow transducer with good corrosion-resisting performance |
| CN107923776A (en) * | 2015-07-28 | 2018-04-17 | 森泰克有限公司 | Electromagnetic flow sensor |
| CN107923776B (en) * | 2015-07-28 | 2020-05-19 | 森泰克有限公司 | Electromagnetic flow sensor |
| US11054291B2 (en) | 2015-07-28 | 2021-07-06 | Sentec Ltd | Electromagnetic flow sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Patentee address after: 201707, Shanghai Qingpu Industrial Park, 575 new water channel Shanghai starry sky Automatic Instrument Co., Ltd. Patentee address before: 201317, Yongxing, Shanghai, 18 small road, Kai International Building, 6A, Shanghai starry sky Instrument Factory |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101121 Granted publication date: 20010919 |