CN212843776U - Two-phase metering device of moisture based on integration venturi - Google Patents
Two-phase metering device of moisture based on integration venturi Download PDFInfo
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- CN212843776U CN212843776U CN202021332770.3U CN202021332770U CN212843776U CN 212843776 U CN212843776 U CN 212843776U CN 202021332770 U CN202021332770 U CN 202021332770U CN 212843776 U CN212843776 U CN 212843776U
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Abstract
The utility model belongs to the technical field of two-phase flow measurement, in particular to a moisture two-phase metering device based on an integrated Venturi tube, which comprises an inlet cylinder section, a conical contraction section, a cylinder throat, a conical diffusion section and an outlet cylinder section which are connected in sequence; the inlet cylinder section is provided with a pressure measuring point and a first differential pressure measuring point, the cylindrical throat part is provided with a second differential pressure measuring point, and the outlet cylinder section is provided with a temperature measuring point and a third differential pressure measuring point; the pressure measuring point, the temperature measuring point, the first, the second and the third differential pressure measuring points are respectively provided with a sensor which is electrically connected with a meter arranged above the metering device; the utility model discloses changed the on-the-spot installation mode of the scattered part of traditional flow measurement throttling arrangement, only 1 instrument on the scene, the installation is maintained portably, has reduced the fault rate, has improved the dynamic characteristic of instrument, has eliminated on the scene especially "walk the connecting pipe" to the influence of measuring, the installation cost that has significantly reduced.
Description
Technical Field
The utility model belongs to the technical field of two-phase flow measures, in particular to two-phase metering device of moisture based on integration venturi.
Background
With the development of the oil and gas industry, solving the problem of online measurement of moisture becomes more and more important, and a simple, reliable, economical and practical online non-separation measurement method is needed to replace the traditional gas-liquid separator and optimize the production process flow of gas production, the traditional flowmeter can only measure by taking gas phase or liquid phase as a single medium, and when the volume percentage content of the gas phase in the liquid phase exceeds 5-10%, the flow measurement error is large and even abnormal work occurs. The two-phase flow metering device of the moisture utilizes the principle that a certain relation exists between the pressure difference and the flow generated when the fluid flows through the throttling device, realizes the flow measurement by measuring the pressure difference, the basic measurement principle is a flow measurement method based on the energy conservation law-Bernoulli equation and the flow continuity equation, a local contraction element is arranged in a pipeline, the resolution of the liquid phase content and the measurement of the split-phase flow are realized by utilizing the three-level differential pressure of the throttling device, and a simple, reliable, economical and practical solution is provided for the online measurement of the moisture.
Traditional flow measurement throttling arrangement adopts the on-the-spot installation mode of dispersion part, causes the on-the-spot installation process chaotic easily, and efficiency is not high, and is unfavorable for subsequent maintenance work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a double-phase metering device of moisture based on integration venturi, improve the installation effectiveness, reduce the loaded down with trivial details process of on-the-spot installation operation, reduce the fault rate, reduce holistic installation cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a kind of two-phase metering device of moisture based on integrated Venturi tube, set up between upstream cylinder section and downstream cylinder section, used for measuring the gas-liquid phase flow through upstream, downstream cylinder section online, the two-phase metering device of said moisture includes the entry cylinder section, conical contraction section, cylindrical throat, conical diffusion section and outlet cylinder section connected sequentially;
the inlet end of the inlet cylindrical section is connected with a second flange arranged at the outlet of the upstream cylindrical section in an alignment mode through a first flange, and the outlet end of the outlet cylindrical section is connected with a fourth flange arranged at the inlet of the downstream cylindrical section in an alignment mode through a third flange;
the inlet cylinder section is provided with a pressure measuring point and a first differential pressure measuring point which are sequentially arranged along the fluid flowing direction, the cylindrical throat part is provided with a second differential pressure measuring point, and the outlet cylinder section is provided with a temperature measuring point and a third differential pressure measuring point which are sequentially arranged along the fluid flowing direction;
the pressure measuring point, the temperature measuring point, the first, the second and the third differential pressure measuring points are respectively provided with a sensor, and the sensors are electrically connected with an instrument arranged above the metering device.
Under the optimal condition, the pressure measuring point and the temperature measuring point are both arranged right above the pipeline.
Under the optimal condition, the first differential pressure measuring point, the second differential pressure measuring point and the third differential pressure measuring point are respectively provided with two measuring holes, the two measuring holes are distributed on two sides of the corresponding pipeline, and radial lines of the two measuring holes form an included angle of 90 degrees.
Under the optimal condition, lifting lugs are arranged on the inlet cylindrical section and the outlet cylindrical section for lifting,
the lifting lugs on the inlet cylindrical section are staggered with the bolt holes in the first flange, and the lifting lugs on the outlet cylindrical section are staggered with the bolt holes in the third flange.
Under the optimal condition, the inlet cylinder section, the conical contraction section, the cylindrical throat part, the conical diffusion section and the outlet cylinder section are all processed by adopting bar materials in a segmented mode and then are connected in a welding mode.
Under the optimal condition, an instrument support mounting hole is formed in the upper pipe body of the cylindrical throat part and used for mounting an instrument support, and the instrument is fixed to the upper end of the instrument support.
Under the optimal conditions, a protective cover is arranged on the outer side of the inlet cylindrical section, the conical contraction section, the cylindrical throat part, the conical diffusion section and the outlet cylindrical section.
Compared with the prior art, the utility model discloses following technological effect has:
1. the utility model provides a moisture double-phase metering device based on integration venturi, changed the on-the-spot installation mode of traditional flow measurement throttling arrangement dispersion part, the scene has only 1 instrument, and the installation is maintained portably, has reduced the fault rate, has improved the dynamic characteristic of instrument, has eliminated the influence that the scene "walks the connecting pipe" to the measurement, has greatly reduced the installation cost;
2. the utility model provides a moisture double-phase metering device based on integration venturi, compact structure, temperature and pressure multi-parameter integrated design, 3 way differential pressure, 1 way temperature data adopt 5 channel signal directly to carry out flow measurement and temperature and pressure compensation, 1 flowmeter only needs 1 instrument, the wiring only needs 14 cable cores, has effectively reduced installation cost and installation degree of difficulty; in a specific use process, parameters such as temperature, pressure, differential pressure, air volume, liquid volume and the like can be displayed by only one instrument, and a flow integrating instrument does not need to be arranged independently;
3. the utility model provides a moisture two-phase metering device based on integrated Venturi tube, no radioactive source, no gamma ray source, the throttling device has simple structure, firmness, safety, stable and reliable performance, less maintenance amount and long service life; the safety and the reliability are realized;
the direct mixed transportation measurement is adopted, based on the original 'temperature and pressure integrated multi-parameter' measurement technology, the gas phase and the liquid phase are not separated, a separator is not needed, no immovable part is needed, the structure is simple and the accuracy of the measurement of the gas phase and the liquid phase content is high; the two-phase measuring device of the moisture can directly measure various moisture media, well head gas of a gas field, such as conventional gas, condensate gas shale gas, coal bed gas, wet saturated steam and other moisture gases; the method has wide application range, and is suitable for cluster well groups, unmanned single wells, mixed transportation and separate well metering, offshore platforms and the like.
Other features and advantages of the present invention will be described in detail in the following detailed description.
Drawings
FIG. 1 is a schematic diagram of an integrated venturi-based two-phase metering device for wet gas, according to an embodiment of the present invention;
FIG. 2 shows a partial cross-sectional view of the two-phase wet gas metering device based on an integrated venturi of FIG. 1;
FIG. 3 is a schematic structural view of section A-A of FIG. 2;
FIG. 4 is a schematic structural view of section B-B of FIG. 2;
FIG. 5 is a schematic structural view of section C-C of FIG. 2;
FIG. 6 is a schematic structural view of section D-D of FIG. 2;
FIG. 7 is a schematic structural view of section E-E of FIG. 2;
FIG. 8 is a schematic structural view of section F-F of FIG. 2;
the reference numbers in the figures illustrate: 1-an upstream cylinder section, 2-a downstream cylinder section, 10-an inlet cylinder section, 11-a first flange, 12-a second flange, 13-a pressure measuring point, 14-a first differential pressure measuring point, 20-a conical contraction section, 30-a cylindrical throat, 301-an instrument support mounting hole, 31-a second differential pressure measuring point, 40-a conical diffusion section, 50-an outlet cylinder section, 51-a third flange, 52-a fourth flange, 53-a temperature measuring point, 54-a third differential pressure measuring point, 60-an instrument, 61-an instrument support, 70-a lifting lug and 80-a shield.
Detailed Description
In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further clarified by combining the specific drawings.
It should be noted that, in the present invention, when an element is referred to as being "fixed" to another element, it may be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the present invention provides a two-phase moisture metering device based on an integrated venturi tube, which is disposed between an upstream cylinder section 1 and a downstream cylinder section 2, and is used for online metering of gas-liquid phase flow flowing through the upstream and downstream cylinder sections 1 and 2; the two-phase metering device of the moisture comprises an inlet cylindrical section 10, a conical contraction section 20, a cylindrical throat part 30, a conical diffusion section 40 and an outlet cylindrical section 50 which are connected in sequence; wherein the inlet end of the inlet cylinder segment 10 is connected in alignment with the second flange 12 arranged at the outlet of the upstream cylinder segment 1 via the first flange 11, and the outlet end of the outlet cylinder segment 50 is connected in alignment with the fourth flange 52 arranged at the inlet of the downstream cylinder segment 2 via the third flange 51; the inlet cylinder section 10 is provided with a pressure measuring point 13 and a first differential pressure measuring point 14 which are sequentially arranged along the fluid flowing direction, the cylinder throat 30 is provided with a second differential pressure measuring point 31, and the outlet cylinder section 50 is provided with a temperature measuring point 53 and a third differential pressure measuring point 54 which are sequentially arranged along the fluid flowing direction; the pressure measuring point 13, the temperature measuring point 53, the first, second and third differential pressure measuring points are respectively provided with a sensor, and the sensors are electrically connected with an instrument 60 arranged above the metering device.
In the utility model, the inlet cylinder section 10, the conical contraction section 20, the cylindrical throat 30, the conical diffusion section 40 and the outlet cylinder section 50 are integrally molded and manufactured in a factory, and particularly, the inlet cylinder section 10 is provided with a pressure measuring point 13 and a first differential pressure measuring point 14, the cylindrical throat 30 is provided with a second differential pressure measuring point 31, and the outlet cylinder section 50 is provided with a temperature measuring point 53 and a third differential pressure measuring point 54; in the process of field installation, only the inlet end of the inlet cylindrical section 10 is connected with the upstream cylindrical section 1, and the outlet end of the outlet cylindrical section 50 is connected with the downstream cylindrical section 2, so that the method is simple and convenient; the utility model provides an overall structure design that double-phase metering device of moisture adopted has changed the mode that traditional flow measurement throttling arrangement disperses part, field installation, makes a flow measurement system in the past become the flow measurement instrument of single unit, and only an instrument is on-the-spot promptly, and the installation is maintained portably, has reduced the fault rate, has improved the dynamic characteristic of instrument, has eliminated on-the-spot "walk the connecting pipe" especially to the influence of measuring, the significantly reduced installation cost.
The utility model provides a two-phase metering device of moisture, which utilizes the principle that a certain relation exists between the pressure difference and the flow generated when the fluid flows through a throttling device to realize the flow measurement by measuring the pressure difference, the basic measurement principle is a flow measurement method based on the energy conservation law-Bernoulli equation and the flow continuity equation,
a local contraction element which is optimally designed through fluid mechanics calculation is arranged in a pipeline, the resolution of liquid phase content and the measurement of split-phase flow are realized by utilizing three-level differential pressure of a throttling device, the principle and the pressure taking position are specifically shown in figure 2, wherein delta PFDifferential pressure, DeltaP, formed for the upstream and throat of the VenturiBThe differential pressure formed between the throat part and the downstream of the Venturi, and the delta P is the total pressure loss formed between the upstream and the downstream of the Venturi.
The total flow of moisture was:
wherein: rhomThe average density of gas phase and liquid phase;
beta is the diameter ratio, beta is D/D;
d is the orifice diameter of the throttling element;
d is the diameter of the pipeline;
c is a Venturi flow coefficient;
moisture liquid phase volume fraction of long throat venturi:
namely, the LVF (%) of the liquid phase in the moisture is not only compared with the former differential pressure DeltaPFAnd back differential pressure Δ PBThe ratio is also related to the total pressure loss DeltaP and the front differential pressure DeltaPFThe ratios are related.
Flow rate of wet gas and liquid phase QL=LVF(%)×Q;
Flow rate of wet gas phase QG=Q-QL
According to the utility model, as shown in fig. 3-6 and 8, the pressure measuring point 13 and the temperature measuring point 53 are both arranged right above the pipeline. The first differential pressure measuring point 14, the second differential pressure measuring point 31 and the third differential pressure measuring point 54 are all provided with two measuring holes, the two measuring holes are distributed on two sides of the corresponding pipeline, and radial lines of the two measuring holes form an included angle of 90 degrees.
According to the utility model discloses, for the convenience the utility model provides a double-phase metering device of moisture is fixed with the installation of upper reaches drum section 1 and low reaches drum section 2, entry drum section 10 and export drum section 50 on all be equipped with lug 70 and be used for lifting by crane, as shown in fig. 7, lug 70 that is located on entry drum section 10 staggers with the bolt hole on the first flange 11, lug 70 that is located on export drum section 50 staggers with the bolt hole on the third flange 51. Therefore, the installation of bolts, nuts and gaskets on the first flange 11 and the second flange 12, and the installation of bolts, nuts and gaskets on the third flange 51 and the fourth flange 52 are facilitated, and the position interference influence of the lifting lug 70 is avoided.
The utility model provides an among the double-phase metering device of moisture based on integration venturi, entry cylinder section 10, circular cone shrinkage section 20, cylinder throat 30, circular cone diffuser section 40 and export cylinder section 50 all adopt bar segmentation processing, then welded connection. And in the welding connection process, the welding quality is ensured, the pressure-resistant grade is ensured to be 10MPa, and all welding seams are subjected to flaw detection.
In a specific embodiment of the present invention, the upper pipe body of the cylindrical throat portion 30 is provided with an instrument holder mounting hole 301 for mounting an instrument holder 61, and the instrument 60 is fixed on the upper end of the instrument holder 61.
The utility model discloses in, it is right in order to realize the protection of the double-phase metering device of moisture, the outside of entry circle cylinder section 10, circular cone shrinkage section 20, cylinder throat 30, circular cone divergent section 40 and export circle cylinder section 50 is equipped with a guard shield 80. The sheath 80 is of one-piece design.
The utility model provides a double-phase metering device of moisture based on integration venturi, instrument 60 exportable 4 passageway (4 ~ 20) mA standard current signal and RS485 standard communication interface, show simultaneously that pressure, temperature, differential pressure, gaseous phase instantaneous flow, liquid phase instantaneous flow, gaseous phase cumulative flow, liquid phase cumulative flow, yesterday gas production, yesterday liquid production, this day gas production, this day liquid production etc. multinomial parameter data.
The utility model provides a two-phase metering device of moisture based on integration venturi accomplishes the back in processing, needs to do the pressure tightness test according to corresponding pressure, guarantees not to have any abnormal phenomena such as leakage, no seepage, and surface requirement does not have the anomalous phenomena such as mar, bruise, according to the fluid flow direction at pipeline throat position mark arrow point.
The foregoing shows and describes the general principles, essential features, and features of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the description of the above embodiments and the description is only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A two-phase metering device of moisture based on an integrated Venturi tube is arranged between an upstream cylinder section (1) and a downstream cylinder section (2) and is used for online metering the gas-liquid phase flow flowing through the upstream cylinder section and the downstream cylinder section, and is characterized by comprising an inlet cylinder section (10), a conical contraction section (20), a cylindrical throat (30), a conical diffusion section (40) and an outlet cylinder section (50) which are sequentially connected;
wherein the inlet end of the inlet cylinder section (10) is connected with a second flange (12) arranged at the outlet of the upstream cylinder section (1) in a contraposition mode through a first flange (11), and the outlet end of the outlet cylinder section (50) is connected with a fourth flange (52) arranged at the inlet of the downstream cylinder section (2) in a contraposition mode through a third flange (51);
the inlet cylinder section (10) is provided with a pressure measuring point (13) and a first differential pressure measuring point (14) which are sequentially arranged along the flow direction of the fluid, the cylinder throat (30) is provided with a second differential pressure measuring point (31), and the outlet cylinder section (50) is provided with a temperature measuring point (53) and a third differential pressure measuring point (54) which are sequentially arranged along the flow direction of the fluid;
the pressure measuring point (13), the temperature measuring point (53), the first, second and third differential pressure measuring points are respectively provided with a sensor, and the sensors are electrically connected with an instrument (60) arranged above the metering device.
2. The two-phase wet gas metering device based on the integrated Venturi tube according to claim 1, wherein the pressure measuring point (13) and the temperature measuring point (53) are arranged right above the pipeline.
3. The two-phase wet gas metering device based on the integrated Venturi tube according to claim 1, wherein the first differential pressure measuring point (14), the second differential pressure measuring point (31) and the third differential pressure measuring point (54) are respectively provided with two measuring holes, the two measuring holes are distributed on two sides of the corresponding pipeline, and radial lines of the two measuring holes form an included angle of 90 degrees.
4. The two-phase wet gas metering device based on the integrated Venturi tube according to claim 1, characterized in that lifting lugs (70) are arranged on the inlet cylindrical section (10) and the outlet cylindrical section (50) for lifting,
the lifting lugs (70) on the inlet cylindrical section (10) are staggered with bolt holes on the first flange (11), and the lifting lugs (70) on the outlet cylindrical section (50) are staggered with bolt holes on the third flange (51).
5. The two-phase wet gas metering device based on the integrated venturi tube as claimed in claim 1, wherein an instrument holder mounting hole (301) is formed in an upper pipe body of the cylindrical throat portion (30) for mounting an instrument holder (61), and the instrument (60) is fixed to an upper end of the instrument holder (61).
6. Two-phase wet gas metering device based on an integrated venturi tube according to claim 1, characterized in that the inlet cylindrical section (10), the conical convergent section (20), the cylindrical throat (30), the conical divergent section (40) and the outlet cylindrical section (50) are provided with a shield (80) on the outside.
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CN113375741A (en) * | 2021-04-29 | 2021-09-10 | 安徽中控仪表有限公司 | Moisture two-phase flow metering device and method based on three-differential-pressure data fitting model |
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Cited By (1)
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CN113375741A (en) * | 2021-04-29 | 2021-09-10 | 安徽中控仪表有限公司 | Moisture two-phase flow metering device and method based on three-differential-pressure data fitting model |
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