CN2639883Y - Gas-liquid velocity of flow and phase capacity sensor - Google Patents
Gas-liquid velocity of flow and phase capacity sensor Download PDFInfo
- Publication number
- CN2639883Y CN2639883Y CN 03238130 CN03238130U CN2639883Y CN 2639883 Y CN2639883 Y CN 2639883Y CN 03238130 CN03238130 CN 03238130 CN 03238130 U CN03238130 U CN 03238130U CN 2639883 Y CN2639883 Y CN 2639883Y
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- plate
- capacitor
- pole plate
- radome
- stray capacitance
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Abstract
The utility model relates to a gas-liquid two-phase flow capacitor sensor, comprising a flange, a guard plate, a capacitor plate, a connection pipe, a plate pipe, a shield case and a plurality of capacitor filtering circuits; wherein, the flange is fixed on both ends of the connection pipe; the plate pipe and the shield case are fixed between two connecting flanges; the capacitor plate is arranged on the excircle which is in the middle of the plate pipe; the guard plate is arranged at both sides of the extrude; the capacitor plate and the shield case are connected with leads respectively; the length L of the guard plate and the capacitor plate are fixed by the principle 2R 1 is less than or equal to L is less than or equal to 2R2, in which R2=1.5R1, the arc shaped plate field angle Theta=120 to 140 degrees, and the optimum parameter of the shield case radius R3R is approximately equal to 2R1. The utility model has the advantages of simple structure, low cost, high sensitivity, being capable of measuring the flow rate, phase concentration and slip ratio, and suitable for measuring the noninvasive gas-liquid two-phase flow of oil pipelines.
Description
Technical field
The utility model relates to the capacitive transducer that a kind of oil field petroleum pipeline survey is used, particularly a kind of biphase gas and liquid flow capacitive transducer.
Background technology
In petroleum industry is produced, oil well ejection or the crude oil of extracting out are a kind of polyphasic flows, wherein comprise crude oil, water, rock gas and silt particle etc., because the flox condition difference of conveyance conduit, this polyphasic flow may produce multiple flow patterns such as annular flow, turbulent flow, core shape stream, and its measurement problem is a very complicated problems.And its accurate metering is extremely important foundation for Petroleum Production, and for example, the measurement of profit content is that the formulation of evaluation underground oil storage amount, extraction value, recovery percent of reserves and recovery scheme all is most important technical indicator.In order to solve the material mixed flow problems of measurement of gas-liquid different configuration in the oil pipeline, usually adopt separate type to measure, promptly to crude oil process high pressure, the low pressure separating treatment, gas, oil, moisture leaves, re-use plate flowmeter or ededy current gauge and carry out single-phase measurement, not only efficient is low, the expense height, and measuring error is big, does not satisfy the needs of Petroleum Production, so be sought after at present studying and a kind ofly can Real-time and Dynamic reflect needed total data information, promptly accurately measure the flow velocity of polyphasic flow, phase concentration, slip factor etc., and the life-span is long, and cost hangs down the oil pipeline multiphase flow measurement sensor with non-intrusion type.
The utility model content
The purpose of this utility model is the technical matters that exists at existing oil pipeline multiphase flow measurement, provide a kind of simple in structure, cost is low, the life-span is long, susceptibility is high, the accurate non-intrusion type biphase gas and liquid flow capacitive transducer of measurement flow rate, phase concentration, slip factor.
The utility model comprises ring flange, protection pole plate, capacitor plate, connecting tube, polar plate tube, radome and stray capacitance filtering circuit; the two ends of described connecting tube are fixed with ring flange; polar plate tube and radome are separately fixed between two mounting flanges; capacitor plate is arranged on the middle cylindrical of polar plate tube; the both sides of its cylindrical are provided with the protection pole plate; capacitor plate and radome are connected to lead-in wire respectively, the power supply pole plate S of described stray capacitance filtering circuit
1Be connected with driving voltage+V, survey pole plate S
2Join with the negative input end of amplifier, its negative input end and output terminal are parallel with feedback capacity and resistance, and the positive input terminal of radome and amplifier is all distinguished ground connection, has constituted three-terminal capacitor, and power supply pole plate S is arranged
1With detection pole plate S
2Between capacitor C x, power supply pole plate S
1And the stray capacitance CS between radome
1, survey pole plate S
2And the stray capacitance CS between radome
2, stray capacitance CS
1In parallel with supply voltage+V, stray capacitance CS
2In parallel with the virtual earth point effect ground connection of amplifier; structural principle of the present utility model is: the capacitance of capacitive transducer is directly proportional with the capacitor plate area; capacitor plate is obtained longer; then capacitance is also bigger; the influence of edge effect will be relative reduce, protection pole plate and capacitor plate length L are pressed 2R
1≤ L≤2R
2Principle determine R
1Be connecting tube internal diameter, R
2Be connecting tube external diameter, wherein R
1-R
2Big more, the homogeneity of electric field is good more, but the decline of capacitance-sensitive degree, its optimal parameter is R
2=1.5R
1, lonely shape pole plate subtended angle θ=120 °~140 °, radome radius R
3External diameter R with connecting tube
2The distance parameter difference, i.e. R
3-R
2The numerical value difference, the electric field that is produced on the capacitor plate, magnetic field intensity and direction of an electric field are all different, then polar board surface electric density is surveyed in influence, will obtain different capacitances and capacitance-sensitive degree, its optimal parameter is R
3≈ 2R
1
Owing to adopt technique scheme, the utlity model has simple in structure, cost is low, the life-span is long, susceptibility is high, accurately advantages such as measurement flow rate, phase concentration and slip factor are suitable for the measurement of oil pipeline non-intrusion type biphase gas and liquid flow.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is stray capacitance filtering circuit figure;
Among the figure: 1 ring flange, 2 protection pole plates, 3 capacitor plates, 4 protection pole plates, 5 ring flanges, 6 connecting tubes, 7 polar plate tubes, 8 radomes, 9 capacitor plates lead-in wire, 10 radomes lead-in wire, 11 power supply pole plates, 12 are surveyed pole plate, 13 amplifiers.
Embodiment:
As depicted in figs. 1 and 2, further specify the technical solution of the utility model and structural principle in conjunction with the embodiments.A kind of biphase gas and liquid flow capacitive transducer, the two ends of the connecting tube 6 of this sensor are fixed with ring flange 1 and ring flange 5 respectively, polar plate tube 7 and galvanized sheet radome 8 are separately fixed between ring flange 1 and the ring flange 5, and in the middle of polar plate tube 7 was arranged on, radome 8 was arranged on outermost layer.Capacitor plate 3 is by power supply pole plate 11 and survey pole plate 12 and forms, is separately positioned on the cylindrical in the middle of the polar plate tube 7, and its cylindrical both sides are respectively arranged with identical protection pole plate of structure 2 and protection pole plate 4, capacitor plate and protect the Copper Foil of plate material.Capacitor plate 3 is connected to capacitor plate lead-in wire 9, and radome 8 is connected to radome lead-in wire 10.Connecting tube 6 internal diameter R
1Be 50.8mm, external diameter R
2Be 80mm, the pole plate length L is 100mm, and lonely shape pole plate subtended angle θ is 120 ° of radome external diameter R
3Be 100mm, connecting tube 6 all is an organic glass with the material of polar plate tube 7, and the air layer between two pipes, constitutes three-layer insulated layer, and its specific inductive capacity is respectively 3.50,1.00,3.50.Adopt the insulating material of such specific inductive capacity, the capacitance-sensitive degree distributes better, this capacitive transducer easy to install, by screw the ring flange at two ends is fixed on the middle support of oil pipeline, when crude oil flows through from connecting tube, because the variation of capacitance then can accurately be measured parameters such as crude oil flow velocity, phase concentration, slip factor, by converter measuring-signal is transformed into voltage signal, reflect and measure the every measuring technique data of polyphasic flow in the oil pipeline.
Claims (4)
1, a kind of biphase gas and liquid flow capacitive transducer; it is characterized in that; this capacitive transducer comprises ring flange, protection pole plate, capacitor plate, connecting tube, polar plate tube, radome and stray capacitance filtering circuit; the two ends of connecting tube are fixed with mounting flange; polar plate tube and radome are separately fixed between two mounting flanges; capacitor plate is arranged on the middle cylindrical of polar plate tube, and the both sides of its cylindrical are provided with the protection pole plate, and capacitor plate and radome are connected to lead-in wire respectively.
2, capacitive transducer as claimed in claim 1 is characterized in that, the power supply pole plate S of stray capacitance filtering circuit
1Be connected with driving voltage+V, survey pole plate S
2Join with the negative input end of amplifier, its negative input end and output terminal are parallel with electric capacity and resistance, and the positive input terminal of radome and amplifier is all distinguished ground connection, has constituted three-terminal capacitor, its electric capacity has the capacitor C x between power supply pole plate and detection pole plate, the stray capacitance C between power supply pole plate and radome
S1, survey the stray capacitance C between pole plate and radome
S2, stray capacitance C
S1In parallel with supply voltage+V, stray capacitance C
S2In parallel with the virtual earth point ground connection of amplifier.
3, capacitive transducer as claimed in claim 1 is characterized in that, protection pole plate and capacitor plate length L are pressed 2R
1≤ L≤2R
2Principle determine R wherein
2=1.5R
1, lonely shape pole plate subtended angle θ=120 °~140 °, the optimal parameter of radome radius R 3 is R
3≈ 2R
1
4, capacitive transducer as claimed in claim 1 is characterized in that, the air layer between connecting tube, polar plate tube and two pipes constitutes three-layer insulated layer, and its specific inductive capacity is respectively 3.50,1.00,3.50.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 03238130 CN2639883Y (en) | 2003-09-08 | 2003-09-08 | Gas-liquid velocity of flow and phase capacity sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 03238130 CN2639883Y (en) | 2003-09-08 | 2003-09-08 | Gas-liquid velocity of flow and phase capacity sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2639883Y true CN2639883Y (en) | 2004-09-08 |
Family
ID=34291999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 03238130 Expired - Fee Related CN2639883Y (en) | 2003-09-08 | 2003-09-08 | Gas-liquid velocity of flow and phase capacity sensor |
Country Status (1)
Country | Link |
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CN (1) | CN2639883Y (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101865872A (en) * | 2010-04-27 | 2010-10-20 | 清华大学 | Spiral capacitance sensor for measuring gas-liquid two-phase flow porosity of tiny pipeline |
CN101413911B (en) * | 2008-11-27 | 2012-05-09 | 上海交通大学 | Method and device for measuring two-phase flow parameter based on double-end capacitance probe |
CN101477075B (en) * | 2008-11-06 | 2012-05-30 | 东北大学 | Air, solid two-phase flow phase-concentration detection apparatus |
CN108828029A (en) * | 2018-08-14 | 2018-11-16 | 天津大学 | Moisture percentage measuring apparatus based on plug-in capacitance sensor |
-
2003
- 2003-09-08 CN CN 03238130 patent/CN2639883Y/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101477075B (en) * | 2008-11-06 | 2012-05-30 | 东北大学 | Air, solid two-phase flow phase-concentration detection apparatus |
CN101413911B (en) * | 2008-11-27 | 2012-05-09 | 上海交通大学 | Method and device for measuring two-phase flow parameter based on double-end capacitance probe |
CN101865872A (en) * | 2010-04-27 | 2010-10-20 | 清华大学 | Spiral capacitance sensor for measuring gas-liquid two-phase flow porosity of tiny pipeline |
CN108828029A (en) * | 2018-08-14 | 2018-11-16 | 天津大学 | Moisture percentage measuring apparatus based on plug-in capacitance sensor |
CN108828029B (en) * | 2018-08-14 | 2020-10-23 | 天津大学 | Moisture content measuring device based on plug-in capacitive sensor |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |