CN219495336U - Device for measuring gas-liquid two-phase flow by wedge-shaped flowmeter - Google Patents
Device for measuring gas-liquid two-phase flow by wedge-shaped flowmeter Download PDFInfo
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Abstract
The utility model provides a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter, which comprises: the device is characterized in that an integrated wedge-shaped flowmeter is arranged on the first pipeline, a densimeter is arranged on the second pipeline, the first pipeline is connected with the second pipeline through a connecting flange, the wedge-shaped flowmeter is communicated with the densimeter through a through pipe, and a gas-liquid mixture flows to the second pipeline from the first pipeline. The utility model aims to provide a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter, which is convenient to use and high in measurement accuracy.
Description
Technical Field
The utility model relates to the technical field of gas-liquid two-phase flow detection, in particular to a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter.
Background
Two-phase flow is widely used in industrial production and is closely related to human life. Oil/gas, oil/water two-phase streams as in the petroleum industry; vapor-liquid two-phase flow in the power industry; drying process, mixing process, fluidization process, diffusion process, reaction process, etc. in fields of chemical industry, medicine, energy, etc. Currently, there are many methods for measuring the flow rate of a gas-liquid two-phase flow, such as: a separation measurement method, a double-parameter measurement method combined by a single-phase flowmeter, a direct mass measurement method, a combined measurement method of the single-phase flowmeter and a phase content meter, and the like. For example, patent CN105910663B (application number 201610210009.4) discloses a device and a method for measuring the flow rate of a gas-liquid two-phase flow, which measure the pressure difference in an inner pipe and an outer pipe through three pressure measuring holes, calculate the flow rate of each phase in the two-phase flow according to the pressure difference and the light intensity of near infrared light received by a near infrared receiving probe, and realize accurate measurement of the flow rate of each phase in the gas-liquid two-phase flow without separating the gas-liquid two-phase flow.
However, the device and method for measuring the flow rate of the gas-liquid two-phase flow disclosed in the patent CN105910663B mainly obtain the signal characteristics of the gas-liquid two-phase flow through the measuring probe, the measuring device has a complex and precise structure, is easily affected by the flow of the fluid and the surrounding environment in the measuring process, and causes errors in the measurement, inaccurate measurement and inconvenient use.
Disclosure of Invention
Therefore, the utility model aims to solve the problems of inaccurate measurement and inconvenient use of the measuring device in the prior art.
The utility model provides a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter, which comprises: the device is characterized in that an integrated wedge-shaped flowmeter is arranged on the first pipeline, a densimeter is arranged on the second pipeline, the first pipeline is connected with the second pipeline through a connecting flange, the wedge-shaped flowmeter is communicated with the densimeter through a through pipe, and a gas-liquid mixture flows to the second pipeline from the first pipeline.
Preferably, the wedge-shaped flowmeter comprises: a flow transmitter and a wedge-shaped sensor,
the flow transmitter is communicated with the first pipeline through a plurality of pressure taking guide pipes, the pressure taking guide pipes are arranged on two sides of the wedge-shaped sensor, and the flow transmitter is communicated with the gauge head of the densimeter through a through pipe.
Preferably, the wedge-shaped flowmeter measures P and t in real time, and the measuring device obtains the gas phase density through the following formula:
wherein P is the static pressure of the gas-liquid two-phase flow, pa and t are the temperature of the gas-liquid two-phase flow, DEG C and Mmol are the gas phase mole constants, ρ G Is of gas phase density, kg/m 3 。
Preferably, the densitometer measures ρ in real time m ，ρ L The mass air content is measured by a sampling laboratory, and the measuring device obtains the mass air content by the following formula:
wherein X is mass air content and ρ L Is of liquid phase density of kg/m 3 、ρ m Is the actual density of the gas-liquid two-phase flow, kg/m 3 、ρ G Is of gas phase density, kg/m 3 。
Preferably, the measuring device obtains the correction coefficient by the following formula:
wherein θ is a correction coefficient ρ G Is of gas phase density, kg/m 3 、ρ L Is of liquid phase density of kg/m 3 。
Preferably, the wedge flowmeter measures ΔP in real time TP The measuring device obtains the static pressure drop of the gas-liquid two-phase flow flowing through the wedge shape when the gas-liquid two-phase flow is all liquid through the following formula:
wherein DeltaP o Is the static pressure drop of the wedge shape flowing when the gas-liquid two-phase flow is all liquid, pa and DeltaP TP Is the static pressure drop when the gas-liquid two-phase flow flows through the wedge, pa and theta are correction coefficients, X is the mass air content rate and ρ L Is of liquid phase density of kg/m 3 、ρ G Is of gas phase density, kg/m 3 。
Preferably, the measuring device obtains the mass flow of the gas-liquid two-phase flow flowing through the wedge shape through the following formula:
wherein W is TP The mass flow rate of the gas-liquid two-phase flow flowing through the wedge is that kg/s and delta Po are static pressure drops flowing through the wedge when the gas-liquid two-phase flow is liquid, pa and beta are wedge ratio of the wedge-shaped sensor, psi is thermal expansion coefficient, C is outflow coefficient, A is arcuate flow area, and m is the flow area of the wedge-shaped sensor 2 、ρ L Is of liquid phase density of kg/m 3 。
Preferably, the gas phase mass flow is calculated by the following formula (1):
W G ＝X·W TP (1)；
in the formula (1), W G The gas phase mass flow rate is kg/s, the WTP is the mass flow rate of the gas-liquid two-phase flow flowing through the wedge shape, and the kg/s and the X are the mass gas content;
the liquid phase mass flow is calculated by the following formula (2), wherein the formula is as follows:
W L ＝(1-X)·W TP (2)；
in the formula (2), W L The mass flow rate of the liquid phase is kg/s, the mass flow rate of the gas-liquid two-phase flow flowing through the wedge shape is WTP, and the mass gas content is kg/s and X.
Preferably, the first pipeline and the second pipeline are respectively provided with a dredging device, and the dredging device comprises: a driving motor, an external gear and a side gear,
be provided with the transmission case on first pipeline and the second pipeline respectively, be provided with the external gear in the transmission case, external gear fixed cover is established on first pipeline and the second pipeline, and external gear one side is provided with the side gear, and L type connecting rod one end is connected with the pipeline rotation, and L type connecting rod other end rotates and is connected with driven gear, driven gear and side gear intermeshing.
Preferably, a driving motor is arranged on the L-shaped connecting rod, a driving gear is arranged on an output shaft of the driving motor, the driving gear is meshed with an external gear, a vibrating motor is arranged at the center of a side wall of the driven gear, which is far away from the L-shaped connecting rod, an installing plate is arranged on the output shaft of the vibrating motor, a plurality of collision heads are uniformly distributed on a side wall of the installing plate, which is far away from the vibrating motor, and the collision heads are contacted with the outer wall of the pipeline.
The technical scheme of the utility model has the following advantages: the utility model provides a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter, which comprises: the device is characterized in that an integrated wedge-shaped flowmeter is arranged on the first pipeline, a densimeter is arranged on the second pipeline, the first pipeline is connected with the second pipeline through a connecting flange, the wedge-shaped flowmeter is communicated with the densimeter through a through pipe, and a gas-liquid mixture flows to the second pipeline from the first pipeline. Because the pressure and the temperature of the gas-liquid two-phase flow are measured through the integral wedge-shaped flowmeter, and the static pressure drop when the gas-liquid two-phase flow flows through the wedge, the actual density of the gas-liquid two-phase flow is measured through the densimeter, the flow of the gas-liquid two-phase flow is calculated through the measurement data of the integral wedge-shaped flowmeter and the densimeter, the measuring device has a simple structure, is convenient to install and maintain, is not easily influenced by external environment, can calculate the flow of the gas-liquid two-phase flow according to a formula only according to the measurement data, and has high accuracy of the measurement result and convenient use.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a prior art diagram of the present utility model;
FIG. 3 is a schematic view of the dredging device of the utility model;
the device comprises a first pipeline, a second pipeline, a 3-wedge-shaped flowmeter, a 4-densimeter, a 5-connecting flange, a 6-through pipe, a 7-flow transmitter, an 8-wedge-shaped sensor, a 9-pressure taking guide pipe, a 10-driving motor, an 11-external gear, a 12-side gear, a 13-transmission case, a 14-L-shaped connecting rod, a 15-driven gear, a 16-driving gear, a 17-vibration motor, an 18-mounting plate and a 19-collision head.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present utility model more apparent, preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustrating and explaining the present utility model only and are not limiting the present utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiment of the utility model provides a device for measuring gas-liquid two-phase flow by using a wedge-shaped flowmeter, which is shown in figures 1-2 and comprises: the gas-liquid mixture flow meter comprises a first pipeline 1 and a second pipeline 2 and is characterized in that an integrated wedge-shaped flowmeter 3 is arranged on the first pipeline 1, a densimeter 4 is arranged on the second pipeline 2, the first pipeline 1 and the second pipeline 2 are connected through a connecting flange 5, the wedge-shaped flowmeter 3 and the densimeter 4 are communicated through a through pipe 6, and the gas-liquid mixture flows from the first pipeline 1 to the second pipeline 2;
the wedge flowmeter 3 includes: a flow transmitter 7, a wedge sensor 8,
be provided with wedge sensor 8 on the first pipeline 1 inner wall, flow transmitter 7 communicates with first pipeline 1 through a plurality of pressure taking pipe 9, and a plurality of pressure taking pipe 9 set up in wedge sensor 8 both sides, and flow transmitter 7 communicates with the gauge outfit of densimeter 4 through siphunculus 6.
The working principle and the beneficial effects of the technical scheme are as follows: when measuring the flow of the gas-liquid two phases of the fluid in the pipeline, a flow transmitter 7 on the wedge-shaped flowmeter 3 measures the pressure and the temperature of the gas-liquid mixed fluid in the first pipeline 1 through a plurality of pressure taking pipes 9, the wedge-shaped sensor 8 measures the static pressure drop when the gas-liquid mixed fluid flows through the wedge shape, the densimeter 4 measures the actual density of the gas-liquid mixed fluid in the second pipeline 2, and the flow of the gas-liquid two phases in the gas-liquid mixed fluid is calculated according to the measured data of the wedge-shaped flowmeter 3 and the densimeter 4 respectively; two adjacent pipelines are connected through a connecting flange 5, so that the pipelines are convenient to connect, have good tightness and are not easy to leak; the through pipe 6 is used for communicating the wedge-shaped flowmeter 3 and the densimeter 4, so that pressure balance between the wedge-shaped flowmeter 3 and the densimeter 4 is ensured, and damage to devices caused by overlarge pressure in a pipeline is prevented. Because the pressure and the temperature of the gas-liquid two-phase flow are measured through the integral wedge-shaped flowmeter, and the static pressure drop when the gas-liquid two-phase flow flows through the wedge, the actual density of the gas-liquid two-phase flow is measured through the densimeter, the flow of the gas-liquid two-phase flow is calculated through the measurement data of the integral wedge-shaped flowmeter and the densimeter, the measuring device has a simple structure, is convenient to install and maintain, is not easily influenced by external environment, can calculate the flow of the gas-liquid two-phase flow according to a formula only according to the measurement data, and has high accuracy of the measurement result and convenient use.
In one embodiment, the wedge flowmeter 3 measures P and t in real time, and the measuring device obtains the gas phase density by the following formula:
wherein P is the static pressure of the gas-liquid two-phase flow, pa and t are the temperature of the gas-liquid two-phase flow, DEG C and Mmol are the gas phase mole constants, ρ G Is of gas phase density, kg/m 3 。
The working principle and the beneficial effects of the technical scheme are as follows: the wedge-shaped flowmeter 3 measures the pressure and the temperature of the gas-liquid mixed fluid in the pipeline in real time through the pressure taking pipes 9, and calculates the gas phase density of the gas-liquid mixed fluid according to the measured pressure and temperature through the formula, so that the measurement of each data is convenient, and the acquisition of the gas phase density is simple.
In one embodiment, densitometer 4 measures ρ in real time m ，ρ L The mass air content is measured by a sampling laboratory, and the measuring device obtains the mass air content by the following formula:
wherein X is mass air content and ρ L Is of liquid phase density of kg/m 3 、ρ m Is the actual density of the gas-liquid two-phase flow, kg/m 3 、ρ G Is of gas phase density, kg/m 3 。
The working principle and the beneficial effects of the technical scheme are as follows: the densimeter 4 measures the actual density of the gas-liquid mixed fluid in the pipeline in real time, can directly measure the liquid phase density of the gas-liquid mixed fluid in a laboratory, calculates the mass air content of the gas-liquid mixed fluid according to the measured mixed fluid density and the liquid phase density through the formula, and has convenient measurement and calculation.
In one embodiment, the measurement device derives the correction factor by the following formula:
wherein θ is a correction coefficient ρ G Is of gas phase density, kg/m 3 、ρ L Is of liquid phase density of kg/m 3 。
The working principle and the beneficial effects of the technical scheme are as follows: the gas phase density calculated according to the formula and the measured liquid phase density in the laboratory calculate the correction coefficient of the gas-liquid two-phase flow through the formula, thereby reducing errors generated in the measuring calculation process and improving the measuring precision.
In one embodiment, wedge flowmeter 3 measures ΔP in real time TP The measuring device obtains the static pressure drop of the gas-liquid two-phase flow flowing through the wedge shape when the gas-liquid two-phase flow is all liquid through the following formula:
wherein DeltaP o Is the static pressure drop of the wedge shape flowing when the gas-liquid two-phase flow is all liquid, pa and DeltaP TP Is the static pressure drop when the gas-liquid two-phase flow flows through the wedge, pa and theta are correction coefficients, X is the mass air content rate and ρ L Is of liquid phase density of kg/m 3 、ρ G Is of gas phase density, kg/m 3 。
The working principle and the beneficial effects of the technical scheme are as follows: the wedge-shaped flowmeter 3 measures the static pressure drop of the gas-liquid mixed fluid in the pipeline in real time when the gas-liquid mixed fluid flows through the wedge-shaped sensor 8 through the pressure taking pipes 9, and calculates the static pressure drop of the gas-liquid two-phase flow flowing through the wedge-shaped sensor when the gas-liquid two-phase flow is liquid according to the measured static pressure drop, the liquid phase density and the correction coefficient, the mass air content and the gas phase density calculated by the formulas, and the measurement and calculation are convenient.
In one embodiment, the measuring device obtains the mass flow of the gas-liquid two-phase flow through the wedge by the following formula:
wherein W is TP The mass flow rate of the gas-liquid two-phase flow flowing through the wedge is that kg/s and delta Po are static pressure drops flowing through the wedge when the gas-liquid two-phase flow is liquid, pa and beta are wedge ratio of the wedge-shaped sensor 8, psi is thermal expansion coefficient, C is outflow coefficient, A is arch-shaped flow area and m is the flow area 2 、ρ L Is of liquid phase density of kg/m 3 。
The working principle and the beneficial effects of the technical scheme are as follows: the mass flow of the gas-liquid two-phase flow flowing through the wedge is calculated through the formula, and the mass flow of the gas-liquid two-phase flow flowing through the wedge is convenient to calculate.
In one embodiment, the gas phase mass flow is calculated by the following equation (1):
W G ＝X·W TP (1)；
in the formula (1), W G The gas phase mass flow rate is kg/s, the WTP is the mass flow rate of the gas-liquid two-phase flow flowing through the wedge shape, and the kg/s and the X are the mass gas content;
the liquid phase mass flow is calculated by the following formula (2), wherein the formula is as follows:
W L ＝(1-X)·W TP (2)；
in the formula (2), W L The mass flow rate of the liquid phase is kg/s, the mass flow rate of the gas-liquid two-phase flow flowing through the wedge shape is WTP, and the mass gas content is kg/s and X.
The working principle and the beneficial effects of the technical scheme are as follows: the mass flow and the mass gas-containing rate of the gas-liquid two-phase flow flowing through the wedge are calculated according to the formula, the gas-phase mass flow is calculated according to the formula (1), the liquid-phase mass flow is calculated according to the formula (2), and the flow calculation of the gas-liquid two-phase flow is convenient and accurate.
In one embodiment, as shown in fig. 3, a dredging device is respectively provided on the first pipeline 1 and the second pipeline 2, and the dredging device includes: a drive motor 10, an external gear 11, a side gear 12,
the first pipeline 1 and the second pipeline 2 are respectively provided with a transmission case 13, an external gear 11 is arranged in the transmission case 13, the external gear 11 is fixedly sleeved on the first pipeline 1 and the second pipeline 2, one side of the external gear 11 is provided with a side gear 12, one end of an L-shaped connecting rod 14 is rotationally connected with the pipelines, the other end of the L-shaped connecting rod 14 is rotationally connected with a driven gear 15, and the driven gear 15 is meshed with the side gear 12;
the driving motor 10 is arranged on the L-shaped connecting rod 14, the driving gear 16 is arranged on the output shaft of the driving motor 10, the driving gear 16 is meshed with the external gear 11, the vibration motor 17 is arranged at the center of a side wall of the driven gear 15 far away from the L-shaped connecting rod 14, the mounting plate 18 is arranged on the output shaft of the vibration motor 17, a plurality of collision heads 19 are uniformly distributed on a side wall of the mounting plate 18 far away from the vibration motor 17, and the collision heads 19 are contacted with the outer wall of the pipeline.
The working principle and the beneficial effects of the technical scheme are as follows: when the pipeline is used for a period of time, part of fluid can be attached to the inner wall of the pipeline under the influence of external environment, the measurement of the gas-liquid two-phase flow by the measuring device is influenced, the driving motor 10 is started to drive the driving gear 16 to rotate, the driving gear 16 rotates around the pipeline while rotating through the gear meshing transmission between the driving gear 16 and the external gear 11, the driving motor 10 and the L-shaped connecting rod 14 rotate around the pipeline to drive the driven gear 15 to rotate around the pipeline, the driven gear 15 rotates around the pipeline while rotating through the gear meshing transmission between the driven gear 15 and the side gear 12, the vibrating motor 17, the mounting plate 18 and the collision head 19 rotate around the pipeline while rotating, the vibrating motor 17 is started to drive the collision head 19 to vibrate, the collision heads 19 intermittently collide with the circumferential outer wall of the pipeline, the fluid attached to the inner wall of the pipeline is vibrated, the inner wall of the pipeline is guaranteed to be clean, the measuring device is convenient to measure the fluid, and the fluid measuring precision is improved; the dredging device has simple structure and convenient use.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. An apparatus for measuring a gas-liquid two-phase flow with a wedge-shaped flow meter, comprising: the gas-liquid mixture flow direction device is characterized in that an integrated wedge-shaped flowmeter (3) is arranged on the first pipeline (1), a densimeter (4) is arranged on the second pipeline (2), the first pipeline (1) is connected with the second pipeline (2) through a connecting flange (5), the wedge-shaped flowmeter (3) is communicated with the densimeter (4) through a through pipe (6), and the gas-liquid mixture flows to the second pipeline (2) from the first pipeline (1).
2. An apparatus for measuring a gas-liquid two-phase flow with a wedge-shaped flow meter according to claim 1, characterized in that the wedge-shaped flow meter (3) comprises: a flow transmitter (7) and a wedge-shaped sensor (8),
be provided with wedge sensor (8) on first pipeline (1) inner wall, flow transmitter (7) are through a plurality of pressure taking pipe (9) and first pipeline (1) intercommunication, and a plurality of pressure taking pipe (9) set up in wedge sensor (8) both sides, and flow transmitter (7) are through the gauge outfit intercommunication of siphunculus (6) with densimeter (4).
3. A device for measuring a gas-liquid two-phase flow with a wedge-shaped flowmeter according to claim 1, characterized in that the first pipe (1) and the second pipe (2) are respectively provided with a dredging device, the dredging device comprising: a driving motor (10), an external gear (11) and a side gear (12),
be provided with transmission case (13) on first pipeline (1) and second pipeline (2) respectively, be provided with external gear (11) in transmission case (13), external gear (11) fixed cover is established on first pipeline (1) and second pipeline (2), and external gear (11) one side is provided with side gear (12), and L type connecting rod (14) one end is connected with the pipeline rotation, and L type connecting rod (14) other end rotates and is connected with driven gear (15), driven gear (15) and side gear (12) intermeshing.
4. A device for measuring a gas-liquid two-phase flow by using a wedge-shaped flowmeter according to claim 3, characterized in that a driving motor (10) is arranged on the L-shaped connecting rod (14), a driving gear (16) is arranged on an output shaft of the driving motor (10), the driving gear (16) is meshed with an external gear (11), a vibrating motor (17) is arranged at the center of a side wall of the driven gear (15) far away from the L-shaped connecting rod (14), a mounting plate (18) is arranged on an output shaft of the vibrating motor (17), a plurality of collision heads (19) are uniformly distributed on a side wall of the mounting plate (18) far away from the vibrating motor (17), and the collision heads (19) are contacted with the outer wall of a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320373257.6U CN219495336U (en) | 2023-03-02 | 2023-03-02 | Device for measuring gas-liquid two-phase flow by wedge-shaped flowmeter |
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| CN202320373257.6U CN219495336U (en) | 2023-03-02 | 2023-03-02 | Device for measuring gas-liquid two-phase flow by wedge-shaped flowmeter |
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