Single tube three-phase flow meter
One, technical field the invention belongs to the field of measuring technique of flow, particularly relates to a kind of three-phase flow measuring device.
Two, the three-phase flow measuring method that background technology is used at present both at home and abroad, mostly all flow and void fraction measuring technique have been carried out to effective combination, adopt combination method to carry out multiple parameters detection, rather than carry out three-phase flow detection by simple a kind of technology.Traditional three-phase flow measuring system, adopt the separated method of part to measure, three-phase flow is separated into two kinds of fluids that account for main body with liquid and gas, then metering respectively, in measurement flow pattern can being limited in to the less scope of relative variation with measurement parameter like this, thus measurement range and the accuracy of measurement of assurance or raising three-phase flow measuring system.Measuring three-phase flow is mainly the mass rate that will measure oil gas water.Therefore, measure the mass rate of each phase and all will use round-about way, indirectly measuring method need to be measured the instantaneous velocity of each phase and each by the phase fraction in cross section, and then tries to achieve single-phase mass rate and the total flow of potpourri by calculating.Because subsurface environment is extremely severe, the measurement range of three-phase flow meter is subject to a lot of restrictions, as be subject to the impact in various degree such as void fraction, oil content, water percentage, viscosity, salinity, the volume of this type of flowmeter is all comparatively huge, and the error of most of flowmeters is nearly all in 10% left and right, and not for real-time measurement.
Three, summary of the invention the object of this invention is to provide a kind of single tube three-phase flow meter, solved measuring accuracy not high, the problem that accommodation is little, it comprises pipeline, air and liquid mixer, gas-liquid flowmeter, anti-explosion electric variable valve, stop valve, gas meter, liquid flowmeter, double flanges differential pressure transmitter, pipe column type cyclone separator, liquid-level interface meter and flow control computing machine, be that pipeline import is inverted U-shaped pipeline, on upper water flat tube section, be provided with air and liquid mixer, after air and liquid mixer, on vertical pipeline section, be provided with sampling isocon, described sampling isocon is 1~10, be preferably 2~4, and radial symmetry setting on vertical pipeline section, at the horizontal pipeline section of pipeline, be provided with gas-liquid flowmeter, the horizontal pipeline section of pipeline is connected with the vertical pipeline section of pipeline by 90 ° of elbows, at the vertical pipeline section of bottom line, by 90 ° of elbows, be connected with the horizontal pipeline section of pipeline outlet, on sampling isocon, be provided with anti-explosion electric variable valve, sampling isocon is tangential access tube pillar cyclone separator downwards, at pipe column type cyclone separator top, be provided with liquid-level interface meter, in pipe column type cyclone separator upper and lower, be provided with double flanges differential pressure transmitter, at pipe column type cyclone separator bottom liquid phases discharge pipe, be provided with liquid flowmeter and anti-explosion electric variable valve, at pipe column type cyclone separator upper gaseous phase discharge pipe, be provided with stop valve and gas meter, gaseous phase outlet pipeline is connected with liquid-phase outlet pipeline by 90 ° of elbows, liquid-phase outlet pipeline is connected with the horizontal pipeline section of pipeline outlet, gas-liquid flowmeter, anti-explosion electric variable valve, gas meter, liquid flowmeter, double flanges differential pressure transmitter, liquid-level interface meter is connected with flow control computing machine by data line, in pipe column type cyclone separator bottom, be upwards provided with successively temperature sensor and electric heater, described electric heater is heat tape or electrical heating wire or electrically heated rod or electric heating blanket, after pipe column type cyclone separator bottom liquid phases discharge pipe anti-explosion electric variable valve, be provided with anti-explosion electric pump, volume of the present invention is little, lightweight, not affected by fluidised form, the scope of application is wide, cost performance is high, measuring accuracy is high, and by the real-time measurement result of Computer display.
Four, description of drawings 1 is single tube three-phase flow meter front view;
Fig. 2 is single tube three-phase flow meter side view;
Fig. 3 is single tube three-phase flow meter vertical view.
Five, embodiment is described further single tube three-phase flow meter of the present invention below in conjunction with Fig. 1 to Fig. 3, it comprises pipeline 1, air and liquid mixer 2, gas-liquid flowmeter 5, anti-explosion electric variable valve 6, stop valve 14, gas meter 15, liquid flowmeter 12, double flanges differential pressure transmitter 10, pipe column type cyclone separator 7, liquid-level interface meter 11 and flow control computing machine 16, be that pipeline 1 import is inverted U-shaped pipeline, on upper water flat tube section, be provided with air and liquid mixer 2, after air and liquid mixer, on vertical pipeline section 3, be provided with sampling isocon 4, described sampling isocon 4 is 1~10, be preferably 2~4, and radial symmetry setting on vertical pipeline section 3, at the horizontal pipeline section of pipeline 1, be provided with gas-liquid flowmeter 5, the horizontal pipeline section of pipeline 1 is connected with the vertical pipeline section of pipeline 1 by 90 ° of elbows, at the vertical pipeline section of bottom line 1, by 90 ° of elbows, be connected with the horizontal pipeline section of pipeline 1 outlet, on sampling isocon 4, be provided with anti-explosion electric variable valve 6, sampling isocon 4 is tangential access tube pillar cyclone separator 7 downwards, at pipe column type cyclone separator 7 tops, be provided with liquid-level interface meter 11, in pipe column type cyclone separator 7 upper and lowers, be provided with double flanges differential pressure transmitter 10, at pipe column type cyclone separator 7 bottom liquid phases discharge pipes, be provided with liquid flowmeter 12 and anti-explosion electric variable valve 6, at pipe column type cyclone separator 7 upper gaseous phase discharge pipes, be provided with stop valve 14 and gas meter 15, gaseous phase outlet pipeline is connected with liquid-phase outlet pipeline by 90 ° of elbows, liquid-phase outlet pipeline is connected with the horizontal pipeline section of pipeline 1 outlet, gas-liquid flowmeter 5, anti-explosion electric variable valve 6, gas meter 15, liquid flowmeter 12, double flanges differential pressure transmitter 10, liquid-level interface meter 11 is connected with flow control computing machine 16 by data line, in pipe column type cyclone separator 7 bottoms, be upwards provided with successively temperature sensor 9 and electric heater 8, described electric heater 8 is heat tape or electrical heating wire or electrically heated rod or electric heating blanket, after pipe column type cyclone separator 7 bottom liquid phases discharge pipe anti-explosion electric variable valve 6, be provided with anti-explosion electric pump 13.