CN114485825A - Simple gas-liquid two-phase flow comprehensive measuring device - Google Patents
Simple gas-liquid two-phase flow comprehensive measuring device Download PDFInfo
- Publication number
- CN114485825A CN114485825A CN202210046804.XA CN202210046804A CN114485825A CN 114485825 A CN114485825 A CN 114485825A CN 202210046804 A CN202210046804 A CN 202210046804A CN 114485825 A CN114485825 A CN 114485825A
- Authority
- CN
- China
- Prior art keywords
- gas
- liquid
- flow
- liquid separation
- separation cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a simple gas-liquid two-phase flow comprehensive measuring device which comprises a gas-liquid separation cavity, a micropore separation net, a spherical floater, a gas flowmeter, a liquid flowmeter, a sliding piston, a gas outlet flange and a liquid outlet. The middle section of the gas-liquid separation cavity is cylindrical, and the upper section and the lower section of the gas-liquid separation cavity are both conical. The micropore separating net comprises an upper micropore separating net and a lower micropore separating net which are respectively embedded in the upper section and the lower section of the gas-liquid separating cavity, and the spherical floater is arranged above the upper micropore separating net. And the gas flowmeter and the liquid flowmeter are respectively arranged at the narrow passages above and below the gas-liquid separation cavity. A sliding piston is arranged at an outlet below the gas-liquid separation cavity, and a liquid outlet is arranged below the sliding piston. The invention can measure the gas flow or the liquid flow independently, can separate the gas in the gas-liquid two-phase flow, and can measure the gas and the liquid flow in the gas-liquid two-phase flow, is suitable for measuring the flow in most gas-liquid two-phase flow complex flowing states, and meets the requirement of flow measurement development.
Description
Technical Field
The invention relates to the field of flow measurement, in particular to a simple gas-liquid two-phase flow comprehensive measuring device.
Background
With the progress and development of science and technology, new technology and new method for flow measurement are in variety, the types of flow metering devices are gradually increased, and the measurement accuracy is gradually improved. The most widely used gas flow measuring devices and liquid flow measuring devices have long-term development in respective measuring directions, and are basically suitable for required occasions in respective measuring fields, but in some special occasions, such as various flow measuring laboratories, the device not only needs to measure the flow of a single medium fluid, but also needs to measure the flow of complex flows, and when the single gas flow measuring device and liquid flow measuring device are applied to the measurement in the occasions, the limitation exists, and the measurement accuracy is greatly reduced, and in some cases, even cannot be measured.
Disclosure of Invention
The invention aims to provide a device for comprehensively measuring gas-liquid two-phase flow, which can accurately measure the flow of gas and liquid in a system to be measured under the condition of not interfering the internal flow of the system to be measured, provides a solution for measuring the gas-liquid two-phase flow of the system to be measured, provides reliable data support for the research of the internal flow mechanism of the system to be measured, and promotes the further development of the research of multiphase flow.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
a simple gas-liquid two-phase flow comprehensive measuring device comprises an inlet flange, a gas-liquid separation cavity, a micropore separation net, a spherical floater, a gas flowmeter, a liquid flowmeter, a sliding piston, a gas outlet flange and a liquid outlet.
The middle section of the gas-liquid separation chamber is cylindrical, and an inlet flange is arranged on one side of the gas-liquid separation chamber; the upper section and the lower section of the gas-liquid separation cavity are both conical and are used for carrying out gas-liquid separation on the gas-liquid two-phase flow flowing into the cavity.
The micropore separation net comprises an upper micropore separation net and a lower micropore separation net which are respectively embedded in the upper section and the lower section of the gas-liquid separation cavity.
The spherical floater is arranged above the upper microporous separation net.
The gas flowmeter is arranged in a narrow channel above the gas-liquid separation cavity and is used for measuring the instantaneous gas flow and the accumulated gas flow discharged from the gas-liquid separation cavity.
The liquid flow meter is arranged in a narrow channel below the gas-liquid separation cavity and used for measuring the instantaneous liquid flow and the accumulated liquid flow discharged from the gas-liquid separation cavity.
The gas outlet flange is arranged at an outlet above the gas-liquid separation cavity.
The sliding piston is arranged at an outlet below the gas-liquid separation cavity, and a liquid outlet is arranged below the sliding piston.
Furthermore, the gas-liquid two-phase flow comprehensive measuring device is connected with a device to be measured by adopting a standard flange and keeps vertical installation.
Furthermore, the interior of the spherical floater is of a hollow structure, and the uniform density of the spherical floater is far less than that of liquid.
Further, the micropore separating net is a disc filled with round micropores.
Furthermore, the liquid outlet adopts a net structure to increase the flow rate of fluid passing through.
Further, the gas flow meter is coupled to the liquid flow meter.
The invention has the beneficial effects that:
the invention designs a simple gas-liquid two-phase flow comprehensive measuring device by utilizing the characteristics of a gas and liquid flowmeter, the measuring device can measure the gas flow or the liquid flow independently and can separate the gas in the gas-liquid two-phase flow, the gas flow and the liquid flow in the gas-liquid two-phase flow are measured, the total flow is obtained by mutual addition, the measuring device is suitable for measuring the flow in most gas-liquid two-phase flow complex flowing states, a new thought and a new device are provided for the flow measurement of the gas-liquid two-phase flow, the requirement of the flow measurement development is met, the new development of the gas-liquid two-phase flow measurement is promoted, and the related research of the gas-liquid two-phase flow is promoted to a certain extent.
Drawings
FIG. 1 is a schematic view of a simplified gas-liquid two-phase flow measuring device of the present invention;
FIG. 2 is a schematic gas-liquid two-phase flow measurement during self-priming of a self-priming pump;
figure 3 is a schematic view of a microporous separation web.
In the figure, 1, an inlet flange; 2. a gas outlet flange; 3. a gas flow meter; 4. a spherical float; 5. a microporous separation net is arranged; 6. a gas-liquid separation chamber; 7. a lower microporous separation web; 8. a liquid flow meter; 9. a sliding piston; 10. a liquid outlet; 11. a water inlet pipe; 12. a pump body; 13. a gas-liquid separation chamber; 14. a water outlet pipe; 15. the invention relates to a measuring device.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in figure 1, the simple gas-liquid two-phase flow comprehensive measuring device comprises an inlet flange 1, a gas outlet flange 2, a gas flowmeter 3, a spherical floater 4, a gas-liquid separation cavity 6, a liquid flowmeter 8, a sliding piston 9, a liquid outlet 10 and a micropore separation net. The gas-liquid two-phase flow comprehensive measuring device is connected with a measured device by adopting a standard flange, and the measuring device needs to be ensured to be vertical during installation. Gas-liquid mixed fluid flows in from the inlet flange 1, and the liquid flows downwards along the wall surface in a spiral manner in the direction of the solid arrow and finally flows out from the lower part; the gas flows out from above in the direction of the dotted arrow.
The gas-liquid separation cavity 6 is cylindrical in the middle, and conical above and below. The device is used for separating gas from liquid in a two-phase flow discharged by a device to be detected. In the embodiment, the diameter of the cylindrical part is 80cm, the height is designed to be 20-35cm, the included angle between the upper conical generatrix and the normal line is 60 degrees, the included angle between the lower conical generatrix and the normal line is 25 degrees, and the total flow allowed by the device cannot be more than 15m3H is used as the reference value. When gas-liquid two-phase flows through the inlet flange 1 and enters the gas-liquid separation cavity 6 through the inlet of the flange, the fluid is enabled to flow down in the cavity along the wall surface in a rotating manner due to certain initial speed, the flowing radius of the fluid is gradually reduced due to the conical structure below the gas-liquid separation cavity 6, the flowing speed is gradually increased, and a larger centrifugal force is formed. Due to the difference in gas-liquid density, the centrifugal force causes the gas in the gas-liquid two-phase flow to be dissociated to the center of the gas-liquid separation chamber 6, so that the gas is discharged upwards, the liquid continues to flow downwards, and finally, the gas in the gas-liquid two-phase flow is discharged from the upper part, and the liquid flows downwards.
The microporous separation web, as shown in fig. 3, consists of a disc filled with circular micropores. It comprises an upper micropore separation net 5 and a lower micropore separation net 7 which are respectively embedded above and below a gas-liquid separation cavity 6. The diameter of each micropore of the upper micropore separating net 5 is 1mm, and the distance between the corresponding circle centers of the micropores is 2.5 mm; the diameter of the lower micropore separation net is 0.5mm, and the distance between the corresponding circle centers of the pores is 0.8 mm. Because of the difference in specific gravity between the gas and the liquid, the gas will be deflected away when it encounters the barrier of the lower microporous separation web 7, while the liquid will continue downwards due to its relatively large inertia. The lower microporous separation net 7 further filters the gas-liquid two-phase fluid which is subjected to the centrifugal force, so that the degree and the efficiency of gas-liquid separation are improved. The upper microporous separation net 5 mainly functions to block splashing of liquid and prevent the liquid from entering the position of a gas outlet and influencing the accuracy of gas measurement.
The interior of the spherical floater 4 is of a hollow structure, the uniform density of the spherical floater 4 is far less than that of liquid, and the spherical floater is arranged above the upper micropore separation net 5; when the liquid is to be filled in the gas-liquid separation cavity 6, the liquid level exceeds the upper micropore separation net 5, and the spherical floater 4 floats on the liquid level. The upper part of the gas-liquid separation cavity 6 is of a conical structure, when the spherical floater 4 floats to a certain position, the spherical floater 4 is clamped at the top of the upper conical structure to seal the upper gas discharge channel, and liquid can be discharged from the lower part only.
The sliding piston 9 is arranged at an outlet below the gas-liquid separation cavity, when only gas is discharged, the sliding piston 9 is static, the liquid discharge channel below is closed, and the gas can be discharged only from the upper gas discharge channel; when not only gas is discharged, when the liquid reaches the sliding piston 9, the gravity of the liquid is changed into pressure on the sliding piston due to the larger gravity, when the sliding piston moves downwards to the liquid outlet 10, the liquid can flow out through the meshes, the larger the liquid flow rate is, the larger the downward movement displacement of the piston is, the larger the number of the meshes exposed by the liquid outlet is, and the larger the flow rate of the dischargeable liquid is. When the liquid is exhausted, the sliding piston 9 moves upwards to return to an initial state, so that the lower channel is ensured to only discharge the liquid, and the gas can only be discharged from the upper channel.
The gas flowmeter 3 of the invention is arranged in a channel above the gas-liquid separation cavity, is used for measuring the instantaneous gas flow and the accumulated gas flow discharged from a device to be measured, and is coupled with the liquid flowmeter.
The liquid flowmeter 8 of the invention is arranged in a narrow channel below the gas-liquid separation cavity, is used for measuring the instantaneous liquid flow and the accumulated liquid flow discharged from the measured device, and is coupled with the gas flowmeter, thereby obtaining the instantaneous gas-liquid volume ratio and the total volume of discharged gas-liquid two-phase flow in the operation of the measured device.
The measuring device can measure the flow rate of only gas discharged. When the self-priming pump system begins to start, only gas discharge, sliding piston 9 motionless, below drainage channel is closed, and gas is discharged from the top, and gas flowmeter 3 accurately measures the flow of self-priming pump exhaust gas.
The measuring device can measure the flow rate of only liquid discharged. When only liquid is discharged, the sliding piston moves downwards, the liquid discharging channel below is opened, the liquid flows out from the lower part under the action of gravity, the liquid flow meter accurately measures the flow of the liquid, when the liquid flow is too large, in order to prevent the liquid from being discharged from the exhaust channel above, the spherical floater blocks the upper channel under the action of buoyancy, the liquid can be discharged from the lower part, and the liquid flow meter 8 accurately measures the flow of the liquid.
The measuring device can measure the discharge flow of the gas-liquid mixed fluid. When gas-liquid mixed fluid is discharged, the liquid flows out from the lower part after centrifugal separation and baffling separation due to the action of gravity, and the liquid flow meter 8 accurately measures the flow of the liquid; the gas is separated from the gas-liquid separation cavity 6 through centrifugal force separation because the density of the gas is less than that of the liquid, and is finally discharged from the upper part, the gas flow meter 3 accurately measures the flow of the gas, and the total flow is measured through addition.
Fig. 2 is a schematic diagram showing the flow measurement of a gas-liquid two-phase flow in the self-priming process of the self-priming pump.
The self-priming pump system comprises a water inlet pipe 11, a pump body 12, a gas-liquid separation chamber 13 and a water outlet pipe 14, and the self-priming pump system is connected with a measuring device 15 of the invention through a standard flange. In the self-priming process of the self-priming pump system, air exhaust is a step which must be carried out, the speed of the air exhaust is a key factor influencing the self-priming time of the self-priming pump, but the air exhaust process is a complex process. When the self-priming pump is just started, the liquid level in the water inlet pipe 11 rises, air in the water inlet pipe 11 enters the pump body 12 to be mixed with liquid in the pump, and bubbles with large and small sizes are formed and enter the gas-liquid separation chamber 13 in the pump along with the liquid. In the gas-liquid separation chamber 13, due to the action of gravity, the liquid reflux liquid level does not rise any more, and part of bubbles continue to rise and enter the water outlet pipe 14, enter the gas-liquid separation cavity 6 through the inlet flange 1 of the measuring device, and pass through a channel above the gas-liquid separation cavity to obtain the gas flow of the self-priming pump. After the self-priming pump is started for a period of time, the liquid level of the water inlet pipe 11 continuously rises, liquid flows into the pump, the liquid in the pump is increased, finally, the gas-liquid two-phase flow is filled in the gas-liquid separation chamber 13, the liquid level of the water outlet pipe 14 continuously rises, the gas-liquid mixed two-phase flow flows into the measuring device 15, after passing through the gas-liquid separation chamber 6, the gas is discharged from the exhaust passage, and the liquid is discharged from the liquid discharge passage, so that the flow of the self-priming pump at the moment is obtained. When bubbles in the self-sucking pump are less and the gas phase content is less than 5%, the self-sucking process of the self-sucking pump is basically finished, and the exhaust is also basically finished. At this moment, the flow is sharply increased, when the flow exceeds the maximum flow allowed by the measuring device, liquid is continuously accumulated in the gas-liquid separation cavity 6, the liquid level in the cavity is continuously increased, when the liquid level exceeds the upper micropore separation net 5, the spherical floater 4 floats and finally blocks the exhaust channel, the liquid flows out of the liquid discharge channel, and the flow of the self-priming pump at this moment is obtained.
The measuring device 15 can be directly externally connected to a discharge pipe of a device to be measured, original test conditions are not damaged, the mounting position of the measuring device can be adjusted according to specific test requirements, and a water outlet can be additionally connected with a pipeline to realize the recycling of conveying media.
The device can measure the flow of near ideal fluid under an uncertain state (only containing gas and liquid), can automatically adjust the opening and closing of a channel according to the incoming flow state (gas state or liquid state), and can measure the discharge flow of a complex near ideal fluid.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.
Claims (6)
1. A simple gas-liquid two-phase flow comprehensive measuring device is characterized in that:
the device comprises a gas-liquid separation cavity, a micropore separation net, a spherical floater, a gas flowmeter, a liquid flowmeter, a sliding piston, a gas outlet flange and a liquid outlet;
the middle section of the gas-liquid separation chamber is cylindrical, and an inlet flange is arranged on one side of the gas-liquid separation chamber; the upper section and the lower section of the gas-liquid separation cavity are both conical and are used for carrying out gas-liquid separation on gas-liquid two-phase flow flowing into the gas-liquid separation cavity;
the micropore separation net comprises an upper micropore separation net and a lower micropore separation net which are respectively embedded in the upper section and the lower section of the gas-liquid separation cavity;
the spherical floater is arranged above the upper microporous separation net;
the gas flowmeter is arranged in a narrow channel above the gas-liquid separation cavity and is used for measuring the instantaneous gas flow and the accumulated gas flow discharged from the gas-liquid separation cavity;
the liquid flowmeter is arranged in a narrow channel below the gas-liquid separation cavity and is used for measuring the instantaneous liquid flow and the accumulated liquid flow discharged from the gas-liquid separation cavity;
the gas outlet flange is arranged at an outlet above the gas-liquid separation cavity;
the sliding piston is arranged at an outlet below the gas-liquid separation cavity, and a liquid outlet is arranged below the sliding piston.
2. The simple gas-liquid two-phase flow comprehensive measurement device according to claim 1, characterized in that:
the gas-liquid separation cavity is connected with a device to be tested through an inlet flange and is kept vertically arranged; the inlet flange is a standard flange.
3. The simple gas-liquid two-phase flow comprehensive measurement device according to claim 1, characterized in that:
the interior of the spherical floater is of a hollow structure, and the uniform density of the spherical floater is far less than that of liquid.
4. The simple gas-liquid two-phase flow comprehensive measurement device according to claim 1, characterized in that:
the micropore separating net is a disc filled with round micropores.
5. The simple gas-liquid two-phase flow comprehensive measurement device according to claim 1, characterized in that:
the liquid outlet adopts a net structure and is used for increasing the flow rate through which the fluid can pass.
6. The simple gas-liquid two-phase flow comprehensive measurement device according to claim 1, characterized in that:
the measurement data of the gas flow meter and the liquid flow meter are coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210046804.XA CN114485825A (en) | 2022-01-17 | 2022-01-17 | Simple gas-liquid two-phase flow comprehensive measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210046804.XA CN114485825A (en) | 2022-01-17 | 2022-01-17 | Simple gas-liquid two-phase flow comprehensive measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114485825A true CN114485825A (en) | 2022-05-13 |
Family
ID=81511533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210046804.XA Pending CN114485825A (en) | 2022-01-17 | 2022-01-17 | Simple gas-liquid two-phase flow comprehensive measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114485825A (en) |
-
2022
- 2022-01-17 CN CN202210046804.XA patent/CN114485825A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201241690Y (en) | Oil, water and gas three-phase automatic separated metering device | |
| CN107894260B (en) | Air eliminator for gas-liquid separation and gas-liquid separation method | |
| CN100406857C (en) | Automatic metering device for oil, water and gas three-phase flow | |
| CN1970130B (en) | Liquid-liquid separation device | |
| JP2010534288A (en) | Separator tank | |
| CN111408488A (en) | Main and auxiliary cavity coupling type self-adaptive cyclone centrifugal degassing method and device | |
| RU2706820C1 (en) | Gas separator and device for determining flow rate of one or more components of multiphase medium, in particular a gas-water mixture, and its use | |
| CN200979428Y (en) | An oil-water-gas three-phase flow automatic measurement device | |
| CN114485825A (en) | Simple gas-liquid two-phase flow comprehensive measuring device | |
| JP2019111504A (en) | Deaerator | |
| CN100483079C (en) | Device for automatic measuring oil and gas | |
| CN202306337U (en) | Water current pressure-stabilizing automatic adjustor | |
| CN112083149A (en) | High-precision spiral-flow type crude oil water content measuring instrument | |
| CN201083503Y (en) | Crude oil multi-phase flowmeter | |
| CN217511223U (en) | Device for removing bubbles in liquid | |
| CN215677598U (en) | Sampling device of crude oil sea pipe | |
| CN101637678B (en) | Filter | |
| CN212586370U (en) | High-precision spiral-flow type crude oil water content measuring instrument | |
| RU2307249C1 (en) | Device for well oil production rate measurement | |
| CN218512271U (en) | Miniature full-automatic membrane capability test device | |
| JPH08187403A (en) | Gas/liquid separation device | |
| CN2695923Y (en) | Oil gas automatic metering installation | |
| RU2191262C1 (en) | Device for measurement of well products | |
| CN2541821Y (en) | Three-phase metering device for oil well | |
| CN112684204B (en) | Runoff flow velocity measuring instrument and measuring method for medium runoff level |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |