Gas-liquid two-phase flow ultrasonic flowmeter

Abstract

The utility model relates to the technical field of fluid metering equipment, and discloses a gas-liquid two-phase flow ultrasonic flowmeter which comprises an ultrasonic converter and a shell, the shell comprises a horizontally-arranged pipeline, an ultrasonic liquid level transducer is arranged above the pipeline, and a liquid level sensor is arranged above the ultrasonic liquid level transducer. At least two groups of gas ultrasonic transducers and two groups of liquid ultrasonic transducers are arranged on two sides of the pipeline, and the gas ultrasonic transducers are positioned above the horizontal positions of the liquid ultrasonic transducers; through an ultrasonic liquid level transducer, and a gas ultrasonic transducer and a liquid ultrasonic transducer which are arranged in a vertically staggered manner, the ultrasonic transducer can perform self-judgment according to signals of the ultrasonic liquid level transducer, signals of the gas ultrasonic transducer and signals of the liquid ultrasonic transducer; therefore, the flow of the gas medium and the flow of the liquid medium in the gas-liquid two-phase flow can be accurately output by selectively adopting the signal data of the gas ultrasonic transducer and / or the signal data of the liquid ultrasonic transducer.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid metering equipment, in particular to an ultrasonic flowmeter for gas-liquid two-phase flow. Background Technique

[0002] An ultrasonic flowmeter refers to a flowmeter developed based on the principle that the propagation speed of ultrasonic waves in a flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the velocity of sound waves in a stationary medium. It mainly consists of a transducer and a converter, and has different types such as the Doppler method, the velocity difference method, the beam shift method, the noise method, and the correlation method. According to the principle of signal detection, the ultrasonic flowmeter can use the time difference method to calculate the propagation speed difference, that is, measure the time difference caused by the different propagation speeds during forward and reverse propagation to calculate the velocity of the measured fluid. Since the sound wave transmitted downstream is accelerated by the fluid, while the sound wave transmitted upstream is delayed, the time difference between them is proportional to the flow velocity. It is also possible to send a sine signal to measure the phase shift between two groups of sound waves or send a frequency signal to measure the frequency difference to achieve the measurement of the flow velocity.

[0003] Currently, according to the different metering media, ultrasonic flowmeters can be divided into gas ultrasonic flowmeters and liquid ultrasonic flowmeters. In oil and gas field production, in order to accurately measure the oil and gas production at the wellheads of oil fields and gas fields, in the face of the gas-liquid mixed output at the wellheads of oil fields and gas fields, and the unstable gas-liquid mixing ratio, it is very difficult for existing various flowmeters to accurately measure such gas-liquid two-phase flow media. Usually, it is necessary to separate the gas-liquid mixture at the wellhead, use a gas ultrasonic flowmeter to measure the separated gas medium, use a liquid ultrasonic flowmeter to measure the separated liquid medium, and then mix and output. Therefore, it is necessary to invest in the cost of expensive gas-liquid separation equipment to complete the above work, resulting in a burden on the production costs of oil fields and gas fields. Content of the Utility Model

[0004] The purpose of the utility model is to provide an ultrasonic flowmeter for gas-liquid two-phase flow, which can simultaneously measure the gas and liquid in the gas-liquid two-phase flow.

[0005] To solve the above technical problems, an embodiment of the utility model provides a technical solution as follows:

[0006] An ultrasonic flowmeter for gas-liquid two-phase flow includes an ultrasonic converter and a housing. The housing includes a horizontally arranged pipeline. An ultrasonic liquid level transducer is provided above the pipeline. At least two groups of gas ultrasonic transducers and at least two groups of liquid ultrasonic transducers are provided on both sides of the pipeline. The gas ultrasonic transducers are located above the horizontal position of the liquid ultrasonic transducers.

[0007] Further, the gas ultrasonic transducers are arranged above the central axis of the pipeline, and the liquid ultrasonic transducers are arranged below the central axis of the pipeline.

[0008] Furthermore, each group of gas ultrasonic transducers includes two gas ultrasonic transducers arranged in a horizontal opposed manner, and the gas ultrasonic transducers of different groups are located on different horizontal planes.

[0009] Furthermore, each group of liquid ultrasonic transducers includes two liquid ultrasonic transducers arranged in a horizontal opposed manner, and the liquid ultrasonic transducers of different groups are located on different horizontal planes.

[0010] Furthermore, the ultrasonic channel between the two gas ultrasonic transducers is non-vertically distributed with respect to the axial vertical center plane of the pipeline, and / or the ultrasonic channel between the two liquid ultrasonic transducers is non-vertically distributed with respect to the axial vertical center plane of the pipeline.

[0011] Furthermore, the included angle between the ultrasonic channel and the axial vertical center plane is 45°.

[0012] Furthermore, a temperature and pressure compensation sensor is provided above the pipeline.

[0013] Furthermore, the ultrasonic converter is communicatively connected to the ultrasonic liquid level transducer, the gas ultrasonic transducer, the liquid ultrasonic transducer, and the temperature and pressure compensation sensor.

[0014] The gas-liquid two-phase flow ultrasonic flowmeter provided by the present utility model, compared with the prior art, through the ultrasonic liquid level transducer, and the gas ultrasonic transducer and the liquid ultrasonic transducer arranged in an up-and-down staggered manner, the ultrasonic converter can self-determine according to the signals of the ultrasonic liquid level transducer, the gas ultrasonic transducer, and the liquid ultrasonic transducer, so as to selectively use the signal data of the gas ultrasonic transducer and / or the signal data of the liquid ultrasonic transducer to accurately output the flow rates of the gas medium and the liquid medium in the gas-liquid two-phase flow. Description of the Drawings

[0015] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0016] Figure 1 is a schematic diagram of the overall structure of the gas-liquid two-phase flow ultrasonic flowmeter in an embodiment of the present utility model;

[0017] Figure 2 is a schematic diagram of a partial cross-sectional structure of the gas-liquid two-phase flow ultrasonic flowmeter in an embodiment of the present utility model;

[0018] Figure 3 is a schematic diagram of the principle of the gas-liquid two-phase flow ultrasonic flowmeter in an embodiment of the present utility model.

[0019] Explanation of the accompanying drawings: 1. Ultrasonic flowmeter; 100. Ultrasonic converter; 200. Shell; 210. Pipe; 310. First gas ultrasonic transducer; 311. Second gas ultrasonic transducer; 3100. Ultrasonic channel; 3101. First access port; 3111. Second access port; 320. Third gas ultrasonic transducer; 321. Fourth gas ultrasonic transducer; 410. First liquid ultrasonic transducer; 411. Second liquid ultrasonic transducer; 420. Third liquid ultrasonic transducer; 421. Fourth liquid ultrasonic transducer; 500. Ultrasonic liquid level transducer; 600. Temperature and pressure compensation sensor; 700. Gas medium; 800. Liquid medium; 801. Liquid level. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] like Figures 1 - 3 As shown, one embodiment provided by the utility model relates to a gas-liquid two-phase flow ultrasonic flowmeter 1, comprising an ultrasonic converter 100 and a housing 200, wherein the housing 200 comprises a horizontally arranged pipeline 210, an ultrasonic liquid level transducer 500 is arranged above the pipeline 210, and the ultrasonic liquid level transducer 500 is used to measure the liquid level 801 of the liquid medium 800 in the pipeline 210, and transmit the measured liquid level 801 information to the outside, and at least two groups of gas ultrasonic transducers and two groups of liquid ultrasonic transducers are arranged on both sides of the pipeline 210, and the gas ultrasonic transducers are located above the horizontal position of the liquid ultrasonic transducers. Preferably, each group of gas ultrasonic transducers is arranged on a different horizontal plane, and each group of liquid ultrasonic transducers is arranged on a different horizontal plane.

[0023] like Figures 2 - 3As shown, in an exemplary example, a gas-liquid two-phase flow ultrasonic flowmeter 1 is involved. Among them, there are two sets of gas ultrasonic transducers. The first set of gas ultrasonic transducers includes a first gas ultrasonic transducer 310 and a second gas ultrasonic transducer 311 arranged in a horizontal opposite direction to the first gas ultrasonic transducer 310. The second set of gas ultrasonic transducers includes a third gas ultrasonic transducer 320 and a fourth gas ultrasonic transducer 321 arranged in a horizontal opposite direction to the third gas ultrasonic transducer 320.

[0024] Taking the horizontal opposite arrangement of the two gas ultrasonic transducers in the first set of gas ultrasonic transducers as an example, the first gas ultrasonic transducer 310 is installed at the first inlet 3101 of the pipeline 210, and the second gas ultrasonic transducer 311 is installed at the second inlet 3111 of the pipeline 210. Ultrasonic signals can be transmitted and received between the first gas ultrasonic transducer 310 and the second gas ultrasonic transducer 311. The channel for the first gas ultrasonic transducer 310 and the second gas ultrasonic transducer 311 to transmit and receive ultrasonic signals is the ultrasonic channel 3100. The ultrasonic channel 3100 forms a certain angle with the fluid medium flowing in the pipeline 210, that is, the ultrasonic channel 3100 is a straight line and is arranged in a non-perpendicular cross manner with respect to the axial vertical center plane of the pipeline 210. Furthermore, the time difference caused by the different propagation speeds during forward and reverse propagation is measured, and the flow velocity information of the fluid medium is calculated.

[0025] The horizontal position of the ultrasonic channel 3100 of the first set of gas ultrasonic transducers is higher than the horizontal position of the ultrasonic channel 3100 of the second set of gas ultrasonic transducers.

[0026] In an exemplary example, a gas-liquid two-phase flow ultrasonic flowmeter 1 is involved. Among them, there are two sets of liquid ultrasonic transducers. The first set of liquid ultrasonic transducers includes a first liquid ultrasonic transducer 410 and a second liquid ultrasonic transducer 411 arranged in a horizontal opposite direction to the first liquid ultrasonic transducer 410. The second set of liquid ultrasonic transducers includes a third liquid ultrasonic transducer 420 and a fourth liquid ultrasonic transducer 421 arranged in a horizontal opposite direction to the third liquid ultrasonic transducer 420. The horizontal opposite arrangement method of the liquid ultrasonic transducers is the same as the horizontal opposite arrangement method of the above gas ultrasonic transducers. Among them, the horizontal position of the ultrasonic channel 3100 of the first set of liquid ultrasonic transducers is higher than the horizontal position of the ultrasonic channel 3100 of the second set of liquid ultrasonic transducers.

[0027] Preferably, the angle between the ultrasonic channel 3100 between each group of gas ultrasonic transducers and the axial vertical center plane of the pipeline 210 is set to 45°, and the angle between the ultrasonic channel 3100 between each group of liquid ultrasonic transducers and the axial vertical center plane of the pipeline 210 is set to 45°.

[0028] In one embodiment, a gas-liquid two-phase flow ultrasonic flowmeter 1 is involved. Among them, the gas ultrasonic transducer is arranged above the central axis of the pipeline 210, and the liquid ultrasonic transducer is arranged below the central axis of the pipeline 210. According to the size of the diameter of the pipeline 210, the gas ultrasonic transducer can be arranged in two groups or multiple groups, and the liquid ultrasonic transducer can be arranged in two groups or multiple groups. The gas ultrasonic transducer is used to measure the volume flow rate of the gas medium 700 when the gas medium 700 passes through the pipeline 210, and the liquid ultrasonic transducer is used to measure the volume flow rate of the liquid medium 800 when the liquid medium 800 passes through the pipeline 210.

[0029] In one embodiment, a gas-liquid two-phase flow ultrasonic flowmeter 1 is involved, and it further includes a temperature and pressure compensation sensor 600. The temperature and pressure compensation sensor 600 is installed above the pipeline 210 of the ultrasonic flowmeter 1 and is used to measure and provide the temperature information and pressure information of the medium in the pipeline 210.

[0030] The ultrasonic converter 100 is communicatively connected to the ultrasonic liquid level transducer 500, the gas ultrasonic transducer, the liquid ultrasonic transducer, and the temperature and pressure compensation sensor 600, and can receive the signals of the ultrasonic liquid level transducer 500, the gas ultrasonic transducer, the liquid ultrasonic transducer, and the temperature and pressure compensation sensor 600 and perform self-determination. The ultrasonic converter 100 judges the liquid level 801 of the liquid medium 800 in the pipeline 210 according to the liquid level 801 signal of the ultrasonic liquid level transducer 500, and performs self-diagnosis according to the signal of the gas ultrasonic transducer. For example, when the liquid medium 800 in the pipeline 210 submerges the gas ultrasonic transducer, the signal quality of the gas ultrasonic transducer drops significantly, and the automatic gain amplification factor of the signal is abnormal, then it is determined that the working state of the gas ultrasonic transducer is abnormal; if the liquid medium 800 in the pipeline 210 does not submerge the liquid ultrasonic transducer, the signal quality of the liquid ultrasonic transducer drops significantly, and the automatic gain amplification factor of the signal is abnormal, then it is determined that the working state of the liquid ultrasonic transducer is abnormal.

[0031] During use, the ultrasonic converter 100 determines the liquid level 801 of the liquid medium 800 in the pipeline 210 according to the ultrasonic liquid level transducer 500, and with the assistance of the signals of the gas ultrasonic transducer and the liquid ultrasonic transducer, determines the medium flow rate in the pipeline 210.

[0032] For example, when the liquid level 801 of the liquid medium 800 in the pipeline 210 is around the horizontal center position in the pipeline 210, the ultrasonic liquid level transducer 500 determines the liquid level 801 signal. The liquid level 801 is higher than the horizontal positions of the third liquid ultrasonic transducer 420 and the fourth liquid ultrasonic transducer 421, and its signal passes through the ultrasonic converter 100 for self-diagnosis to determine that the working states of the third liquid ultrasonic transducer 420 and the fourth liquid ultrasonic transducer 421 are normal. If the liquid medium 800 fails to completely submerge the first liquid ultrasonic transducer 410 and the second liquid ultrasonic transducer 411, its signal passes through the ultrasonic converter 100 for self-diagnosis to determine that the working states of the first liquid ultrasonic transducer 410 and the second liquid ultrasonic transducer 411 are abnormal, then the volume flow rate of the liquid medium 800 is determined based on the signal data of the third liquid ultrasonic transducer 420 and the fourth liquid ultrasonic transducer 421; the gas medium 700 is located above the liquid medium 800, the ultrasonic liquid level transducer 500 determines the liquid level 801 signal, and performs self-diagnosis in combination with the signals of the two groups of gas ultrasonic transducers. If both groups of gas ultrasonic transducers are in the gas medium 700, its signal passes through the ultrasonic converter 100 for self-diagnosis to determine that the working states of the two groups of gas ultrasonic transducers are normal, then the volume flow rate of the gas medium 700 in the pipeline 210 is determined according to the weighted average value of the signal data of the two groups of ultrasonic transducers; if the liquid level 801 of the liquid medium 800 in the pipeline 210 is higher than the horizontal positions of the third gas ultrasonic transducer 320 and the fourth gas ultrasonic transducer 321, then its signal passes through the ultrasonic converter 100 for self-diagnosis to determine that the working states of the third gas ultrasonic transducer 320 and the fourth gas ultrasonic transducer 321 are abnormal, then the volume flow rate of the gas medium 700 is determined based on the signal data of the first gas ultrasonic transducer 310 and the second gas ultrasonic transducer 311.

[0033] The gas-liquid two-phase flow ultrasonic flowmeter provided by the present utility model, compared with the prior art, through the ultrasonic liquid level transducer, and the gas ultrasonic transducers and liquid ultrasonic transducers arranged in an up-and-down staggered manner, the ultrasonic converter can perform self-determination according to the signals of the ultrasonic liquid level transducer, the gas ultrasonic transducers and the liquid ultrasonic transducers, so as to selectively use the signal data of the gas ultrasonic transducers and / or the signal data of the liquid ultrasonic transducers to accurately output the flow rates of the gas medium and the liquid medium in the gas-liquid two-phase flow.

[0034] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present utility model, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present utility model.

Claims

1. An ultrasonic flowmeter (1) for gas-liquid two-phase flow, characterized in that, It includes an ultrasonic transducer (100) and a housing (200). The housing (200) includes a horizontally arranged pipeline (210). An ultrasonic liquid level transducer (500) is provided above the pipeline (210). At least two groups of gas ultrasonic transducers and two groups of liquid ultrasonic transducers are provided on both sides of the pipeline (210). The gas ultrasonic transducers are located above the horizontal positions of the liquid ultrasonic transducers.

2. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 1, characterized in that, The gas ultrasonic transducers are arranged above the central axis of the pipeline (210), and the liquid ultrasonic transducers are arranged below the central axis of the pipeline (210).

3. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 1, characterized in that, Each group of the gas ultrasonic transducers includes two gas ultrasonic transducers arranged in horizontal opposite directions, and different groups of gas ultrasonic transducers are located on different horizontal planes.

4. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 1, characterized in that, Each group of the liquid ultrasonic transducers includes two liquid ultrasonic transducers arranged in horizontal opposite directions, and different groups of liquid ultrasonic transducers are located on different horizontal planes.

5. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 3 or 4, characterized in that, The ultrasonic channel (3100) between the two gas ultrasonic transducers is non-vertically distributed with respect to the axial vertical central plane of the pipeline (210), and / or the ultrasonic channel (3100) between the two liquid ultrasonic transducers is non-vertically distributed with respect to the axial vertical central plane of the pipeline (210).

6. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 5, characterized in that, The included angle between the ultrasonic channel (3100) and the axial vertical central plane is 45°.

7. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 1, characterized in that, A temperature and pressure compensation sensor (600) is provided above the pipeline (210).

8. The gas-liquid two-phase flow ultrasonic flowmeter (1) according to claim 7, characterized in that, The ultrasonic transducer (100) is communicatively connected to the ultrasonic liquid level transducer (500), the gas ultrasonic transducers, the liquid ultrasonic transducers, and the temperature and pressure compensation sensor (600).

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