CN1187576C - Multi-ring spiral shape circular tube multiphase flow meter - Google Patents
Multi-ring spiral shape circular tube multiphase flow meter Download PDFInfo
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- CN1187576C CN1187576C CNB031157351A CN03115735A CN1187576C CN 1187576 C CN1187576 C CN 1187576C CN B031157351 A CNB031157351 A CN B031157351A CN 03115735 A CN03115735 A CN 03115735A CN 1187576 C CN1187576 C CN 1187576C
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Abstract
The present invention relates to a multi-ring spiral circular pipe multi-phase flow meter. The pipe walls of an ascending segment and a descending segment of the horizontal diameter of a first ring of an inlet of a circular pipe are respectively provided with differential pressure taking pressure ports, and the differential pressure taking pressure ports are connected with respective differential pressure sensors. The centers of the pipe walls of the vertical direction of the first ring of the inlet and a last ring of an outlet of the circular pipe are respectively provided with differential pressure taking pressure ports, and the differential pressure taking pressure ports are connected with respective differential pressure sensors. Circular electrodes are respectively arranged in an upper end pipe of the vertical direction of the last ring of the outlet of the circular pipe and a lower end pipe of the vertical direction of an inversely second ring of the outlet of the circular pipe and connected with respective electric conduction measuring instruments. The multi-ring circular pipe causes fluid to generate forcing rotational flow, the differential pressure sensors and the electric conduction measuring instruments are arranged on different positions, multi-phase flow mixed-phase density is obtained according to differential pressure, an electric conduction signal or the combination of the differential pressure and the electric conduction signal, and total flow and split-phase flow are obtained after data process.
Description
Technical field
The present invention relates to the measurement mechanism of flow, especially a kind of loopy helix annular-tube multiphase flowmeter.
Background technology
The ring pipe multi-phase flowmeter is the brand-new multiphase flow rates instrument of a kind of structure.Because heterogeneous flowing and the complicacy and the randomness of influence factor, the detection technique of polyphasic flow is a problem that solves far away but be of universal significance.The flow pattern of biphase gas and liquid flow distributes in the pipe just bubble flow, slug flow, slug flow, wave flow, laminar flow, annular flow even core flow etc., they are relevant with factors such as speed of incoming flow, void fraction and piping arrangement and field conditions, and the variation between the flow pattern has randomness and uncertainty; Though oil-water two-phase flow is little to measuring profit total flow problem with being all liquid phase, contains difficult from accurate measurement phase content; Oil, gas, water even oil, gas, water, sand (solid particle) polyphasic flow to oil gas field runs into change more complicated.
The method that adopts generally has the measuring method of traditional single-phase flow instrument and the combination of polyphasic flow test model at present; Or adopt the method (as the combination of combination, gamma-ray density meter and the flowmeter of two different types of traffic meters etc.) of multisensor combination; Or use the new technology in modern age, as ray technology, laser technology, correlation technique, process tomographic imaging technology etc.Problems such as ubiquity complex structure, investment cost height and use inconvenience.
Summary of the invention
The object of the present invention is to provide a kind of loopy helix annular-tube multiphase flowmeter.At the diverse location of ring pipe differential pressure pick-up and conductivity test instrument are installed, by measuring the signal that each sensor and electricity are led, and after data processing, are obtained total flow and separate phase flow rate.
Technical scheme of the present invention is as follows, and it comprises:
1) on the descending branch and the symmetrical tube wall of ascent stage of the import first lap horizontal diameter direction of multi-circle spiral flow shape ring pipe, have first group of differential pressure pressure tappings and second group of differential pressure pressure tappings, first group of differential pressure pressure tappings linked to each other with first differential pressure pick-up by first signal pipe, and second group of differential pressure pressure tappings linked to each other with second differential pressure pick-up by the secondary signal pipe;
2) have the 3rd group of differential pressure pressure tappings at two tube wall central horizontal places of the import first lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe, the 3rd group of differential pressure pressure tappings linked to each other with the 3rd differential pressure pick-up by the 3rd signal pipe;
3) have the 4th group of differential pressure pressure tappings at two tube wall central horizontal places of the outlet last lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe, the 4th group of differential pressure pressure tappings linked to each other with the 4th differential pressure pick-up by the 4th signal pipe.
Also can annular be installed in the upper pipes of the outlet last lap vertical direction of multi-circle spiral flow shape ring pipe and measure first group of electrode that electricity is led, first group of electrode is connected with first conductivity meter; Annular is installed in the lower end pipe of the outlet circle vertical direction second from the bottom of multi-circle spiral flow shape ring pipe measures second group of electrode that electricity is led, second group of electrode is connected with second conductivity meter.
Loopy helix annular-tube multiphase flowmeter adopts a multi-ring annular pipe that fluid is produced and forces eddy flow on the structure, at the diverse location of ring pipe differential pressure pick-up and conductivity test instrument are installed.Interior outside differential pressure signal according to diverse location on the ring pipe obtains flow signal; Obtain the polyphasic flow mixture density according to differential pressure signal or conductance signal or both combinations, after data processing, obtain total flow and separate phase flow rate.
Advantage of the present invention is:
1) instrument have integrated, the characteristics that multiparameter detects, the measurement result between each parameter can complementary be verified;
2) this multi-phase flowmeter has simple in structurely, easy to use, and the input expense is low, and volume is little; Still do not have so succinct structure in the polyphasic flow measuring instrument, economic benefit is very obvious.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the left view of Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2, the present invention includes:
1) on the descending branch and the symmetrical tube wall of ascent stage of the import first lap horizontal diameter direction of multi-circle spiral flow shape ring pipe 1, have first group of differential pressure pressure tappings 11 and second group of differential pressure pressure tappings 7, first group of differential pressure pressure tappings 11 linked to each other with first differential pressure pick-up 2 by first signal pipe, and second group of differential pressure pressure tappings 7 linked to each other with second differential pressure pick-up 6 by the secondary signal pipe;
2) having 4,9, the three groups of differential pressure pressure tappings 4,9 of the 3rd group of differential pressure pressure tappings at two tube wall central horizontal places of the import first lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe 1 is linked to each other with the 3rd differential pressure pick-up 8 by the 3rd signal pipe;
3) having 12,13, the four groups of differential pressure pressure tappings 12,13 of the 4th group of differential pressure pressure tappings at two tube wall central horizontal places of the outlet last lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe 1 is linked to each other with the 4th differential pressure pick-up 10 by the 4th signal pipe.
Annular also can be installed in the upper pipes of the outlet last lap vertical direction of multi-circle spiral flow shape ring pipe 1 to be measured 3, the first groups of electrodes 3 of first group of electrode that electricity leads and is connected with first conductivity meter 5; Annular is installed in the lower end pipe of the outlet circle vertical direction second from the bottom of multi-circle spiral flow shape ring pipe 1 to be measured 15, the second groups of electrodes 14 of second group of electrode that electricity leads and is connected with second conductivity meter 14.
Multi-circle spiral flow shape ring pipe is nonconducting annulus or nonconducting elliptical ring.When heterogeneous fluid flows through ring pipe, between the inside and outside pressure tappings at 11 and 7 places, will produce the differential pressure of flow signal in the representative pipe, with differential pressure pick- up 2 and 6 measure respectively Δ P1 and Δ P2; In the purpose of two differential pressure pick-ups of ring pipe symmetric position design, the one, research different flow states with descending branch of ring pipe ascent stage are to the influence of flow measurement; The 2nd, on the basis that clearly influences rule, utilize two differential pressure signal calculated flow rates, make the result more accurately with reliable, also be convenient to apply after the MICROCOMPUTER PROCESSING; To produce the differential pressure of representing tube fluid hybrid density signal between pressure tappings 4 and 9 and between pressure tappings 12 and 13, with differential pressure pick- up 8 and 10 measure respectively Δ P3 and Δ P4.Signal differential pressure Δ P3 and Δ P4 had both comprised flow signal, had comprised the liquid-column height signal again, can obtain the comprehensive density signal of polyphasic flow after the processing.For biphase gas and liquid flow or oil-water two-phase flow,, after data processing, can get polyphasic flow total flow and separate phase flow rate in conjunction with the density of gas phase and liquid phase.
End section on the ring pipe discharge ring (A-A cross section in as Fig. 1) or/and under the adapter ring end section (B-B cross section in as Fig. 1) locate to be equipped with and measure electrode 3 and the conductivity meter 5 that electricity is led.For containing water multiphase (as air-water two phase flow, oil-water two-phase flow and oil gas water multiphase etc.) when flowing through ring pipe, because the effect of ring pipe, fluid is tending towards laminar flow, and on behalf of water, the conductance measurement result can preferably contain the rate result.This result both can verify that mixture density improve to measure reliability, can estimate the oil gas water multiphase separate phase flow rate in conjunction with the mixture density result of differential pressure measurement again.
The flow pattern and the flow state of import section depend on incoming flow, force rotation through the multi-ring annular pipe after, tube fluid will progressively be tending towards laminar flow according to the difference of Media density.The effect of layering depends on speed of incoming flow, Media density difference and ring pipe number.It is that more eddy flow ring has been passed through at this place that electricity is led the benefit that the detection position is arranged in the last end section of discharge ring; No matter the benefit of end section is to air-water two phase flow or oil-water two-phase flow under the adapter ring and be arranged in, the suffered eddy flow centrifugal force of water is consistent with gravity direction, all is tending towards the ring pipe outside.The form of two potential electrode is not stipulated in the conductance measurement.
Claims (3)
1. loopy helix annular-tube multiphase flowmeter is characterized in that:
1) on the descending branch and the symmetrical tube wall of ascent stage of the import first lap horizontal diameter direction of multi-circle spiral flow shape ring pipe (1), have first group of differential pressure pressure tappings (11) and second group of differential pressure pressure tappings (7), first group of differential pressure pressure tappings (11) linked to each other with first differential pressure pick-up (2) by first signal pipe, and second group of differential pressure pressure tappings (7) linked to each other with second differential pressure pick-up (6) by the secondary signal pipe;
2) have the 3rd group of differential pressure pressure tappings (4,9) at two tube wall central horizontal places of the import first lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe (1), the 3rd group of differential pressure pressure tappings (4,9) linked to each other with the 3rd differential pressure pick-up (8) by the 3rd signal pipe;
3) have the 4th group of differential pressure pressure tappings (12,13) at two tube wall central horizontal places of the outlet last lap perpendicular diameter direction of multi-circle spiral flow shape ring pipe (1), the 4th group of differential pressure pressure tappings (12,13) linked to each other with the 4th differential pressure pick-up (10) by the 4th signal pipe.
2. a kind of loopy helix annular-tube multiphase flowmeter according to claim 1 is characterized in that:
1) annular is installed and measures first group of electrode (3) that electricity is led in the upper pipes of the outlet last lap vertical direction of multi-circle spiral flow shape ring pipe (1), first group of electrode (3) is connected with first conductivity meter (5);
2) annular is installed and measures second group of electrode (15) that electricity is led in the lower end pipe of the outlet circle vertical direction second from the bottom of multi-circle spiral flow shape ring pipe (1), second group of electrode (15) is connected with second conductivity meter (14).
3. a kind of loopy helix annular-tube multiphase flowmeter according to claim 1 is characterized in that: said multi-circle spiral flow shape ring pipe (1) is nonconducting annulus or nonconducting elliptical ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031157351A CN1187576C (en) | 2003-03-09 | 2003-03-09 | Multi-ring spiral shape circular tube multiphase flow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031157351A CN1187576C (en) | 2003-03-09 | 2003-03-09 | Multi-ring spiral shape circular tube multiphase flow meter |
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| Publication Number | Publication Date |
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| CN1434273A CN1434273A (en) | 2003-08-06 |
| CN1187576C true CN1187576C (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031157351A Expired - Fee Related CN1187576C (en) | 2003-03-09 | 2003-03-09 | Multi-ring spiral shape circular tube multiphase flow meter |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342219C (en) * | 2006-05-08 | 2007-10-10 | 中国计量学院 | Two-stroke gas-liquid biphase flowmeter |
| CN103090917B (en) * | 2013-01-07 | 2015-12-23 | 兰州海默科技股份有限公司 | A kind of metering device of the multiphase flow rate based on curved pipe and metering method |
| CN105628108B (en) * | 2015-12-22 | 2018-11-02 | 河北大学 | The device and method of biphase gas and liquid flow flow in a kind of measurement vertical pipeline |
| CN113566908B (en) * | 2021-08-02 | 2023-08-15 | 河北大学 | Differential pressure flowmeter for measuring micro flow and measuring method |
| CN118424400B (en) * | 2024-07-05 | 2024-09-17 | 成都洋湃科技有限公司 | Gas-liquid two-phase fluid flow measurement method and gas-liquid two-phase flowmeter |
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- 2003-03-09 CN CNB031157351A patent/CN1187576C/en not_active Expired - Fee Related
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