CN204330035U - A kind of electromagnetism crosscorrelation measurement sensor - Google Patents
A kind of electromagnetism crosscorrelation measurement sensor Download PDFInfo
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- CN204330035U CN204330035U CN201520031988.8U CN201520031988U CN204330035U CN 204330035 U CN204330035 U CN 204330035U CN 201520031988 U CN201520031988 U CN 201520031988U CN 204330035 U CN204330035 U CN 204330035U
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Abstract
The utility model relates to a kind of electromagnetism crosscorrelation measurement sensor, and the main points of its technical scheme are, it comprises measuring channel, a pair excitation structure assembly, a pair excitation structure fixed head, four pairs of potential electrode assemblies and two pairs of electrode restraint zone with holes; Excitation structure assembly is fixed frame plate by field coil, magnetic core and field coil and is formed, and field coil is saddle, and excitation structure assembly is longer than radical length at the axial length of measuring tube, makes detecting electrode be arranged in the induced field of excitation structure assembly generation; Potential electrode assembly comprises detecting electrode and insulation sleeve, and two pairs of detecting electrodes are positioned at the same radial section of measuring tube, and remaining two pairs of detecting electrodes are at another radial section at a distance of certain axial distance.The electromagnetism crosscorrelation measurement sensor process that the utility model relates to is simple, can continuous coverage, low cost of manufacture, volume are little, lightweight, and flow measurement range is wide, measurement is accurate, can the two-phase flow of on-line measurement or multiphase flow rate.
Description
Technical field
The utility model relates to a kind of flow measuring sensor, particularly relates to a kind of electromagnetism crosscorrelation measurement sensor for measuring oil well oil-water two-phase flow or oil-gas-water three-phase flow flow.
Background technology
Oil, gas, water three-phase flow are a kind of common polyphasic flows, and it is extensively present in modern petroleum industry, therefore has great importance to the research of its measuring technique.Wherein, flow measurement is an important research contents, and usually adopt tachometric method to carry out the flow of indirect inspection oil country tubular good inner fluid, the Measurement accuracy of this hourly velocity seems very important.
Electromagnetic flowmeter is a kind of instrument of measuring flow, and it has Noninvasive feature, does not produce the pressure loss, and it is not by the impact of the fluid self characters such as fluid temperature (F.T.), pressure, density and viscosity, and the fluctuations in discharge of convection cell can respond fast.Electromagnetic flowmeter to have started to be applied in the injection profile logging of the water injection well in oil fields of High water cut, injection well in application in recent years, from current applicable cases, electromagnetic flowmeter is when measuring highly aqueous water two-phase flow, because its electron opaque material (being oil phase in oil-water two-phase flow) content is low, less on measurement result impact, measurement result is comparatively accurate; When the non-highly aqueous water two-phase flow of electromagnetic flowmeter survey, because its electron opaque material content is high, comparatively large on measurement result impact, measuring result error is larger.Given this, develop electromagnetism crosscorrelation measurement sensor and have great importance for the flow measured containing two-phase or multiphase fluid of non-conductive, and can practical application request be met.
Summary of the invention
The utility model overcomes deficiency of the prior art, and provide a kind of electromagnetism crosscorrelation measurement sensor, this sensor can extract more fluid flow information.
The technical solution of the utility model is as follows: a kind of electromagnetism crosscorrelation measurement sensor, comprises measuring channel, a pair excitation structure assembly, a pair excitation structure fixed head, four pairs of potential electrode assemblies and two pairs of electrode restraint zone with holes.Wherein, excitation structure assembly is arranged on both sides outside measuring channel and parallel placement, is fixed on measuring channel by excitation structure fixed head; Excitation structure fixed head with holes is arranged on the outside of excitation structure assembly respectively, and is fixed on measuring channel by excitation structure assembly, and fixed head plate face is parallel to each other and axially parallel with measuring channel.
Described excitation structure assembly is fixed frame plate by field coil, magnetic core and field coil and is formed, and field coil is wound on outside magnetic core, and field coil is that saddle to be affixed on outside measuring channel and to be fixed by excitation coil structure by fixing frame plate.The excitation structure assembly of sensor is longer than radical length at the axial length of measuring channel, makes detecting electrode be arranged in the induced field of excitation structure assembly generation.
Described potential electrode assembly comprises detecting electrode and insulation sleeve, and four pairs of detecting electrodes are each passed through the lining of measuring tube tube wall, measuring channel, and is fixed on measuring channel with electrode restraint zone, by insulation sleeve seal isolation between detecting electrode and measuring channel.Wherein two pairs of detecting electrodes are arranged on the same radial section of measuring tube, a pair detecting electrode is placed in and becomes an angle of 90 degrees measuring tube diameter two ends for generation of measuring-signal with induced field direction, and another is placed in detecting electrode and becomes 0 degree of angular measurement buret diameter two ends to play verification effect with induced field direction; Measuring tube axially in a distance L get another radial section, settles remainder two pairs of detecting electrodes according to the same manner above.
The electromagnetism crosscorrelation measurement sensor that the utility model proposes, its project organization is different from traditional electromagnet flow meter sensor, a pair detecting electrode is become four pairs of detecting electrodes, wherein two pairs of detecting electrodes are used for measuring-signal, become two of 0 degree of angle pairs of detecting electrodes to play verification effect in addition with induced field direction, because be parallel to induced field direction, induction electromotive force can not be produced in theory at these two pairs of detecting electrode two ends, this point can be applied in reality debugging improve is carried out to sensor, thus play verification effect; Four pairs of detecting electrodes are in together in the comparatively uniform magnetic field of a pair field coil generation; Electrode detection signal utilizes Faraday's electromagnetic induction law to obtain; Flow measurement realizes on the basis of detection signal computing cross-correlation.
Electromagnetism crosscorrelation measurement sensor of the present utility model, its measuring principle is: when fluid is by measuring channel, become an angle of 90 degrees to be provided with the identical detecting electrode of two pairs of structures with induced field direction, be called upstream electrode and downstream electrode, upstream and downstream electrode is separated by suitably distance L.From upstream and downstream, two pairs of electrodes extract measuring-signal x (t) and y (t) that can react detected fluid flow condition.This two-way measuring-signal be same field coil produce compared with the same measuring channel of uniform magnetic field at a distance of L place acquisition, this two-way detection signal has correlativity, so computing cross-correlation can be made, cross correlation function R to measuring-signal x (t) and y (t)
xy(τ) such as formula shown in (1):
Computing cross-correlation is done to measuring-signal and can obtain the transit time of fluid from upstream electrode to downstream electrode (Transit Time) τ
0, and then obtain associated flow rate V:
V＝L/τ
0(2)
Associated flow rate can calculate the flow of detected fluid in conjunction with pipeline area of section and time etc.
From correlation method flow measurement principle, when containing aqueous phase and other electron opaque material in fluid, such as, when oil-water two-phase flow or oil-gas-water three-phase flow, there is not obvious impact on the undulatory property that measuring-signal causes in the nonconductor existed in two-phase and polyphasic flow fluid, therefore electromagnetism correlative flow sensor can measure two-phase flow containing electron opaque material or multiphase flow rate in electromagnetism correlative flow sensor measurement.Electromagnetism crosscorrelation measurement sensor is a kind of novel flowrate measuring tool, not only can measure the lower two-phase flow of electron opaque material content or multiphase flow rate in actual applications, and the higher two-phase flow of electron opaque material content or multiphase flow rate can be measured.
Owing to adopting technique scheme, the electromagnetism crosscorrelation measurement sensor that the utility model provides has such beneficial effect, measurement technique is simple, energy continuous coverage, low cost of manufacture, volume are little, lightweight, flow measurement range is wide, measurement is accurate, can on-line measurement two-phase flow or multiphase flow rate.Compared with the electromagnetic flowmeter that the utility model and existing tradition have a pair measurement signal electrode: add detecting electrode to assembly and verify electrode pair assembly, too increase excitation structure assembly length in the axial direction simultaneously, adopt correlation method calculated flow rate value, expand the measurement range that two-phase flow or multiphase flow rate measure electron opaque material content ratio in fluid compared with traditional electrical magnetic flowmeter.
Accompanying drawing explanation
Fig. 1 is the utility model electromagnetism crosscorrelation measurement sensor construction schematic diagram;
Fig. 2 is the utility model electromagnetism crosscorrelation measurement sensor electrode radial section schematic diagram;
Fig. 3 is the utility model electromagnetism crosscorrelation measurement sensor core center axial cross-sectional views;
Fig. 4 is the utility model electromagnetism crosscorrelation measurement sensor electrode pair axial cross-sectional views;
In figure: 1. measuring channel, 2. field coil, 3. magnetic core, 4. field coil fixes frame plate, 5. excitation structure fixed head, 6. electrode restraint zone, 7. detecting electrode, 8. insulation sleeve, 9. lining, 10. excitation structure assembly, 11. potential electrode assemblies, L is detecting electrode distance, and D is measuring tube internal diameter.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
A kind of electromagnetism crosscorrelation measurement sensor, as shown in Fig. 1-Fig. 4, sensor comprises measuring channel 1, a pair excitation structure assembly 10, a pair excitation structure fixed head 5, four pairs of potential electrode assembly 11 with holes and two pairs of electrode restraint zones 6.Wherein, excitation structure assembly 10 is arranged on measuring channel 1 both sides and parallel placement, is fixed on measuring channel 1 by excitation structure fixed head 5; Excitation structure fixed head 5 with holes is arranged on the outside of excitation structure assembly 10 respectively, and is fixed on measuring channel 1 by excitation structure assembly 10.
Described excitation structure assembly 10 is fixed frame plate 4 by field coil 2, magnetic core 3 and field coil and is formed, and field coil 2 is wound on outside magnetic core 3, and field coil 2 to be affixed in saddle outside measuring channel 1 and field coil 2 structure to be fixed by fixing frame plate 4.The excitation structure assembly 10 of sensor is longer than radical length at the axial length of measuring channel, makes detecting electrode 7 be arranged in the induced field of excitation structure assembly 10 generation.
Described potential electrode assembly 11 comprises detecting electrode 7 and insulation sleeve 8,4 pairs of detecting electrodes 7 are each passed through the lining 9 of measuring tube tube wall, measuring channel, and be fixed on measuring channel 1 with electrode restraint zone 6, by insulation sleeve 8 seal isolation between detecting electrode 7 and measuring channel 1.Wherein two pairs of detecting electrodes 7 are arranged on the same radial section of measuring tube 1, a pair detecting electrode 7 is placed in and becomes an angle of 90 degrees measuring tube 1 diameter two ends for generation of measuring-signal with induced field direction, and another is placed in detecting electrode 7 and becomes 0 degree of angular measurement buret 1 diameter two ends to play verification effect with induced field direction; Measuring tube axially in a distance L get another radial section, settles remainder two pairs of detecting electrodes 7 according to the same manner above.Wherein A1 and C1 forms a pair acquisition measurement signal electrode, A2 and C2 forms a pair and obtains measurement signal electrode, A3 and C3 forms a pair detecting electrode and plays verification effect, and A4 and C4 forms a pair detecting electrode and plays verification effect, and four pairs of electrodes are arranged in the more uniform magnetic field of same field coil generation.Field coil is by pulsewidth excitation mode able to programme, and arranging of excitation pulsewidth need meet correlation method flow measurement calculating requirement.In actual use, mounting flange can be set up at electromagnetism crosscorrelation measurement sensor measuring tube two ends, be connected with external fluid line by flange, and then realize the on-line measurement of fluid.When containing the electron opaque material two-phase flow (as oil-water two-phase flow) of certain ratio or polyphasic flow flows through survey sensor, two pairs of detecting electrodes obtain measuring-signal respectively, measure according to correlation method fluid flow.Designed electromagnetism crosscorrelation measurement sensor needs the experiment of real stream to go to demarcate, and then makes measurement value sensor more accurate.
Claims (3)
1. an electromagnetism crosscorrelation measurement sensor, is characterized in that: it comprises measuring channel (1), a pair excitation structure assembly (10), a pair excitation structure fixed head (5) with holes, four pairs of potential electrode assemblies (11) and two pairs of electrode restraint zones (6); Wherein, excitation structure assembly (10) is arranged on measuring channel (1) both sides, outside and parallel placement, is fixed on measuring channel (1) by excitation structure fixed head (5); Excitation structure fixed head (5) with holes is arranged on the outside of excitation structure assembly (10) respectively, and is fixed on measuring channel (1) by excitation structure assembly (10).
2. electromagnetism crosscorrelation measurement sensor according to claim 1, it is characterized in that: described excitation structure assembly (10) is fixed frame plate (4) by field coil (2), magnetic core (3) and field coil and formed, field coil (2) is wound on magnetic core (3) outside, and field coil (2) is affixed on measuring channel (1) outside and field coil (2) structure is fixed by fixing frame plate (4) in saddle; The excitation structure assembly (10) of sensor is longer than radical length at the axial length of measuring channel (1), the induced field making detecting electrode (7) be arranged in excitation structure assembly (10) to produce.
3. electromagnetism crosscorrelation measurement sensor according to claim 1, it is characterized in that: described potential electrode assembly (11) comprises detecting electrode (7) and insulation sleeve (8), two pairs of detecting electrodes (7) are each passed through the lining (9) of measuring tube tube wall, measuring channel, and be fixed on measuring channel (1), by insulation sleeve (8) seal isolation between detecting electrode (7) and measuring channel (1) with electrode restraint zone (6); Wherein two pairs of detecting electrodes (7) are arranged on measuring tube (1) same radial section, a pair detecting electrode (7) is placed in and becomes an angle of 90 degrees measuring tube diameter two ends for generation of measuring-signal with induced field direction, and another is placed in detecting electrode (7) and becomes 0 degree of angular measurement buret diameter two ends to play verification effect with induced field direction; Measuring tube (1) axially in a distance L get another radial section, settles remainder two pairs of detecting electrodes (7) according to the same manner above.
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| CN201520031988.8U CN204330035U (en) | 2015-01-16 | 2015-01-16 | A kind of electromagnetism crosscorrelation measurement sensor |
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| CN201520031988.8U CN204330035U (en) | 2015-01-16 | 2015-01-16 | A kind of electromagnetism crosscorrelation measurement sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157768A (en) * | 2015-09-23 | 2015-12-16 | 燕山大学 | Electromagnetic array related sensor and system for horizontal well oil-gas-water multi-phase flow rate measurement |
| CN108666069A (en) * | 2018-07-06 | 2018-10-16 | 北矿机电科技有限责任公司 | A kind of continuous magnetizer of permanent magnetic separator packaged type entirety magnetic pole and method |
| CN109115286A (en) * | 2018-08-03 | 2019-01-01 | 燕山大学 | Double groups of magnet exciting coil multi-electrode flowmeter sensor based on electromagnetic correlation method |
| CN110715708A (en) * | 2018-07-11 | 2020-01-21 | 浙江大学 | Flowmeter calibrating device |
| CN110715694A (en) * | 2018-07-11 | 2020-01-21 | 浙江大学 | Multifunctional flow experiment device |
-
2015
- 2015-01-16 CN CN201520031988.8U patent/CN204330035U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157768A (en) * | 2015-09-23 | 2015-12-16 | 燕山大学 | Electromagnetic array related sensor and system for horizontal well oil-gas-water multi-phase flow rate measurement |
| CN108666069A (en) * | 2018-07-06 | 2018-10-16 | 北矿机电科技有限责任公司 | A kind of continuous magnetizer of permanent magnetic separator packaged type entirety magnetic pole and method |
| CN108666069B (en) * | 2018-07-06 | 2024-05-28 | 北矿机电科技有限责任公司 | Permanent magnet separator packaging type integral magnetic pole continuous magnetizing device and method |
| CN110715708A (en) * | 2018-07-11 | 2020-01-21 | 浙江大学 | Flowmeter calibrating device |
| CN110715694A (en) * | 2018-07-11 | 2020-01-21 | 浙江大学 | Multifunctional flow experiment device |
| CN109115286A (en) * | 2018-08-03 | 2019-01-01 | 燕山大学 | Double groups of magnet exciting coil multi-electrode flowmeter sensor based on electromagnetic correlation method |
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Granted publication date: 20150513 Termination date: 20180116 |
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