A gas-liquid separation detection device and a method of using the same

Abstract

This invention discloses a gas-liquid separation detection device and its usage method, belonging to the field of oil and gas field gathering and transportation technology. It includes a main pipeline, an inlet pipe, and a drain pipe. The key feature is that it further includes a sensor mounting base and a sensor. Hollow spiral blades and a gas phase upward pipe are disposed within the mounting base housing. The outer surface of the hollow spiral blades is fixedly fitted to the inner wall of the mounting base housing, and the inner surface of the hollow spiral blades is fixedly fitted to the outer wall of the gas phase upward pipe. One end of the gas phase downward pipe extends into the gas phase upward pipe and is flush with its top, while the other end extends out of the mounting base housing and communicates with the main pipeline. The sensor is mounted on the top of the mounting base housing, and a liquid storage tank is fitted onto the bottom of the mounting base housing, communicating with the inner cavity of the housing. This invention can effectively separate gas from crude oil gathering and transportation pipelines, unaffected by the liquid within the gas phase, enabling effective quantitative and real-time online detection, thus providing accurate data for hydrogen sulfide control.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field gathering and transportation technology, and in particular to a gas-liquid separation and detection device and its usage method. Background Technology

[0002] As oil and gas field development enters its mid-to-late stages and new blocks are developed, high-sulfur blocks are gradually increasing, and the number of sulfur-containing well stations is showing a year-on-year upward trend, resulting in serious exceedances of hydrogen sulfide in downstream gathering and transportation systems and stations. Currently, the common practice on-site is to manually add desulfurizing agents to treat hydrogen sulfide in the gathering and transportation system. However, because effective separation of the gas and liquid phases in the crude oil gathering and transportation system is currently impossible, accurate measurement of the hydrogen sulfide content in crude oil cannot be achieved on-site, often leading to large detection errors, untimely adjustment of the dosage, and inability to guarantee the treatment effect.

[0003] Chinese patent document CN213269867U, published on May 25, 2021, discloses an oil-gas separation detection device, including a main body of the device. A monitoring mechanism is provided on one side of the main body of the device. The monitoring mechanism includes a first valve, a first solenoid valve connected to the top of the first valve, a separator connected to the top of the first solenoid valve, a gas-liquid separation valve provided inside the separator, a second valve connected to the top of the separator, a second solenoid valve connected to the top of the second valve, a fourth valve connected to the top of the second solenoid valve, a detection probe connected to one side of the fourth valve, a fourth solenoid valve connected to one end of the detection probe, a discharge port connected to one end of the fourth solenoid valve, and a third valve connected to one side of the separator, a third solenoid valve connected to one end of the third valve.

[0004] The oil-gas separation and detection device disclosed in this patent document monitors the hydrogen sulfide content in the produced fluid gas of a single well through a set monitoring mechanism. A gas-liquid separator is installed on the wellhead production tree pipeline to separate part of the gas from the mixed liquid. However, it still cannot effectively separate the gas in the crude oil gathering and transportation pipeline. Due to the influence of the liquid in the gas phase, it cannot effectively quantify and detect online in real time, and cannot provide accurate basis for hydrogen sulfide treatment. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a gas-liquid separation detection device and its usage method. The present invention can effectively separate the gas in crude oil gathering and transportation pipelines, without being affected by the liquid in the gas phase, and can effectively quantify and detect it online in real time, thereby providing accurate basis for hydrogen sulfide treatment.

[0006] This invention is achieved through the following technical solution: A gas-liquid separation detection device includes a main pipeline, an inlet pipe, and a drain pipe. It is characterized by further including a sensor mounting base and a sensor. The sensor mounting base includes a mounting base housing, hollow spiral blades, a gas phase ascending pipe, a gas phase descending pipe, and a liquid storage tank. The hollow spiral blades and the gas phase ascending pipe are disposed inside the mounting base housing. The outer surface of the hollow spiral blades is fixedly fitted to the inner wall of the mounting base housing, and the inner surface of the hollow spiral blades is fixedly fitted to the outer wall of the gas phase ascending pipe. One end of the gas phase descending pipe extends into the gas phase ascending pipe and is flush with its top. The other end of the gas phase descending pipe extends out of the mounting base housing and communicates with the main pipeline. The sensor is mounted on the top of the mounting base housing. The liquid storage tank is fitted onto the bottom of the mounting base housing and communicates with the inner cavity of the mounting base housing. One end of the inlet pipe is connected to the main pipeline, and the other end is connected to the mounting base housing. One end of the drain pipe is connected to the liquid storage tank, and the other end is connected to the main pipeline.

[0007] The upper part of the mounting base housing is cylindrical, and the lower part is an inverted frustum shape. The upper and lower parts are integrally formed, and the lower part extends into the liquid storage tank.

[0008] The lower opening of the mounting base housing is lower than the inlet of the drain pipe.

[0009] A gap is provided between the top of the gas phase downpipe and the inner top wall of the mounting base housing.

[0010] The central axes of the mounting base housing, the gas phase upward pipe, the gas phase downward pipe, and the liquid storage tank coincide.

[0011] The main pipeline includes a main pipeline inlet valve, a main pipeline body, and a main pipeline outlet valve. The main pipeline inlet valve is connected to the inlet end of the main pipeline body, and the main pipeline outlet valve is connected to the outlet end of the main pipeline body.

[0012] A throat is provided in the middle of the main pipeline body, and the throat is connected to the main pipeline body.

[0013] The throat tube has multiple throat tube holes at its outlet end, and these holes are evenly arranged along the circumference of the throat tube.

[0014] A maintenance valve is connected to the outlet end of the main pipeline body.

[0015] A method for using a gas-liquid separation detection device is characterized by: connecting the gas-liquid separation detection device in series with the pipeline containing liquid gas to be detected; closing the maintenance valve, the main pipeline inlet valve, and the main pipeline outlet valve; removing the sensor; injecting clean water along the inner wall of the mounting base housing; reinstalling the sensor; opening the main pipeline inlet valve and the main pipeline outlet valve; under the throttling effect of the throat tube, a portion of the liquid-containing gas to be detected enters the mounting base housing through the inlet pipe, flows through the hollow spiral blades, and the liquid collects in the liquid storage tank; the gas flows upward through the gas phase ascending pipe to the sensor, completing the detection; then flows back to the gas phase descending pipe, is drawn through the throat tube, and flows into the main pipeline; the liquid in the liquid storage tank flows into the main pipeline through the drain pipe.

[0016] The beneficial effects of this invention are mainly reflected in the following aspects: 1. This invention provides a sensor mounting base comprising a mounting base housing, hollow spiral blades, a gas phase ascending pipe, a gas phase descending pipe, and a liquid storage tank. The hollow spiral blades and the gas phase ascending pipe are disposed within the mounting base housing. The outer surface of the hollow spiral blades is fixedly fitted to the inner wall of the mounting base housing, and the inner surface of the hollow spiral blades is fixedly fitted to the outer wall of the gas phase ascending pipe. One end of the gas phase descending pipe extends into the gas phase ascending pipe and is flush with the top of the gas phase ascending pipe. The other end of the gas phase descending pipe extends out of the mounting base housing and is connected to the main pipeline. The sensor is mounted on the top of the mounting base housing. The liquid storage tank is fitted onto the bottom of the mounting base housing and is connected to the inner cavity of the mounting base housing. One end of the inlet pipe is connected to the main pipeline, and the other end of the inlet pipe is connected to the mounting base housing. One end of the drain pipe is connected to the liquid storage tank, and the other end of the drain pipe is connected to the main pipeline. Compared with existing technologies, this invention can effectively separate the gas in crude oil gathering and transportation pipelines, unaffected by the liquid in the gas phase, enabling effective quantitative and real-time online detection, thereby providing accurate data for hydrogen sulfide treatment.

[0017] 2. This invention utilizes the different properties of gas and liquid phases to achieve efficient separation of the two phases. The main pipeline uses the cavitation effect to achieve autonomous flow of the medium, eliminating the need for additional power units. The entire device has a simple structure and high reliability.

[0018] 3. This invention eliminates the need for additional on-site installation of devices. It can be directly installed on the operating pipeline to be tested, and eliminates the need for multi-stage separation of the medium, enabling continuous real-time detection of liquid-containing gas phases.

[0019] 4. In this invention, the device is directly installed on the pipeline to be tested. After testing, the medium directly enters the original pipeline without contact with the outside world and does not need to be discharged into the environment, thus having good environmental protection properties.

[0020] 5. This invention can be equipped with different types of gas detection sensors according to the required gas phase characteristics, so as to realize online monitoring. The sensor installation and replacement are quite convenient. Attached Figure Description

[0021] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; The diagram is labeled as follows: 1. Main pipeline, 2. Inlet pipe, 3. Sensor mounting base, 4. Sensor, 5. Drain pipe, 11. Main pipeline inlet valve, 12. Main pipeline body, 13. Throat pipe, 14. Throat pipe hole, 15. Main pipeline outlet valve, 16. Inspection valve, 31. Mounting base housing, 32. Hollow spiral blade, 33. Gas phase upward pipe, 34. Gas phase downward pipe, 35. Liquid tank. Detailed Implementation

[0022] Example 1 See Figure 1 A gas-liquid separation detection device includes a main pipeline 1, an inlet pipe 2, a drain pipe 5, a sensor mounting base 3, and a sensor 4. The sensor mounting base 3 includes a mounting base housing 31, hollow spiral blades 32, a gas phase ascending pipe 33, a gas phase descending pipe 34, and a liquid storage tank 35. The hollow spiral blades 32 and the gas phase ascending pipe 33 are disposed within the mounting base housing 31. The outer surface of the hollow spiral blades 32 is fixedly fitted to the inner wall of the mounting base housing 31, and the inner surface of the hollow spiral blades 32 is fixedly fitted to the outer wall of the gas phase ascending pipe 33. The gas phase descending pipe 34... One end of the gas phase upward pipe 33 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is connected to the main pipeline 1. The sensor 4 is installed on the top of the mounting base housing 31. The liquid storage tank 35 is sleeved on the bottom of the mounting base housing 31 and is connected to the inner cavity of the mounting base housing 31. One end of the air inlet pipe 2 is connected to the main pipeline 1, and the other end of the air inlet pipe 2 is connected to the mounting base housing 31. One end of the drain pipe 5 is connected to the liquid storage tank 35, and the other end of the drain pipe 5 is connected to the main pipeline 1.

[0023] This embodiment is the most basic implementation. The sensor mounting base 3 includes a mounting base housing 31, a hollow spiral blade 32, a gas phase upward pipe 33, a gas phase downward pipe 34, and a liquid storage tank 35. The hollow spiral blade 32 and the gas phase upward pipe 33 are disposed inside the mounting base housing 31. The outer side of the hollow spiral blade 32 is attached and fixed to the inner wall of the mounting base housing 31, and the inner side of the hollow spiral blade 32 is attached and fixed to the outer wall of the gas phase upward pipe 33. One end of the gas phase downward pipe 34 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is flush with the main... Pipeline 1 is connected, sensor 4 is installed on the top of mounting base housing 31, liquid tank 35 is sleeved on the bottom of mounting base housing 31, liquid tank 35 is connected to the inner cavity of mounting base housing 31, one end of air inlet pipe 2 is connected to main pipeline 1, the other end of air inlet pipe 2 is connected to mounting base housing 31, one end of drain pipe 5 is connected to liquid tank 35, and the other end of drain pipe 5 is connected to main pipeline 1. Compared with the prior art, it can effectively separate the gas in the crude oil gathering and transportation pipeline, is not affected by the liquid in the gas phase, can effectively quantify and detect online in real time, and thus can provide accurate basis for hydrogen sulfide treatment.

[0024] Example 2 See Figure 1 A gas-liquid separation detection device includes a main pipeline 1, an inlet pipe 2, a drain pipe 5, a sensor mounting base 3, and a sensor 4. The sensor mounting base 3 includes a mounting base housing 31, hollow spiral blades 32, a gas phase ascending pipe 33, a gas phase descending pipe 34, and a liquid storage tank 35. The hollow spiral blades 32 and the gas phase ascending pipe 33 are disposed within the mounting base housing 31. The outer surface of the hollow spiral blades 32 is fixedly fitted to the inner wall of the mounting base housing 31, and the inner surface of the hollow spiral blades 32 is fixedly fitted to the outer wall of the gas phase ascending pipe 33. The gas phase descending pipe 34... One end of the gas phase upward pipe 33 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is connected to the main pipeline 1. The sensor 4 is installed on the top of the mounting base housing 31. The liquid storage tank 35 is sleeved on the bottom of the mounting base housing 31 and is connected to the inner cavity of the mounting base housing 31. One end of the air inlet pipe 2 is connected to the main pipeline 1, and the other end of the air inlet pipe 2 is connected to the mounting base housing 31. One end of the drain pipe 5 is connected to the liquid storage tank 35, and the other end of the drain pipe 5 is connected to the main pipeline 1.

[0025] Preferably, the upper part of the mounting base housing 31 is cylindrical and the lower part is an inverted frustum shape, the upper and lower parts are integrally formed, and the lower part extends into the liquid reservoir 35.

[0026] The lower opening of the mounting base housing 31 is lower than the inlet of the drain pipe 5.

[0027] A gap is provided between the top of the gas phase downpipe 34 and the inner top wall of the mounting base housing 31.

[0028] This embodiment is a preferred implementation method. It utilizes the different properties of the gas and liquid phases to achieve efficient separation of the gas and liquid phases. The main pipeline 1 uses the cavitation effect to achieve autonomous flow of the medium, without the need to add an additional power unit. The entire device has a simple structure and high reliability.

[0029] Example 3 See Figure 1 A gas-liquid separation detection device includes a main pipeline 1, an inlet pipe 2, a drain pipe 5, a sensor mounting base 3, and a sensor 4. The sensor mounting base 3 includes a mounting base housing 31, hollow spiral blades 32, a gas phase ascending pipe 33, a gas phase descending pipe 34, and a liquid storage tank 35. The hollow spiral blades 32 and the gas phase ascending pipe 33 are disposed within the mounting base housing 31. The outer surface of the hollow spiral blades 32 is fixedly fitted to the inner wall of the mounting base housing 31, and the inner surface of the hollow spiral blades 32 is fixedly fitted to the outer wall of the gas phase ascending pipe 33. The gas phase descending pipe 34... One end of the gas phase upward pipe 33 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is connected to the main pipeline 1. The sensor 4 is installed on the top of the mounting base housing 31. The liquid storage tank 35 is sleeved on the bottom of the mounting base housing 31 and is connected to the inner cavity of the mounting base housing 31. One end of the air inlet pipe 2 is connected to the main pipeline 1, and the other end of the air inlet pipe 2 is connected to the mounting base housing 31. One end of the drain pipe 5 is connected to the liquid storage tank 35, and the other end of the drain pipe 5 is connected to the main pipeline 1.

[0030] The upper part of the mounting base housing 31 is cylindrical, and the lower part is an inverted frustum shape. The upper and lower parts are integrally formed, and the lower part extends into the liquid storage tank 35.

[0031] The lower opening of the mounting base housing 31 is lower than the inlet of the drain pipe 5.

[0032] A gap is provided between the top of the gas phase downpipe 34 and the inner top wall of the mounting base housing 31.

[0033] More preferably, the central axes of the mounting base housing 31, the gas phase upward pipe 33, the gas phase downward pipe 34, and the liquid storage tank 35 coincide.

[0034] The main pipeline 1 includes a main pipeline inlet valve 11, a main pipeline body 12, and a main pipeline outlet valve 15. The main pipeline inlet valve 11 is connected to the inlet end of the main pipeline body 12, and the main pipeline outlet valve 15 is connected to the outlet end of the main pipeline body 12.

[0035] This embodiment is another preferred implementation method. It does not require the installation of additional devices on site. It can be directly installed on the running pipeline to be tested and can achieve continuous real-time detection of liquid-containing gas phase without the need for multi-stage separation of the medium.

[0036] Example 4 See Figure 1 A gas-liquid separation detection device includes a main pipeline 1, an inlet pipe 2, a drain pipe 5, a sensor mounting base 3, and a sensor 4. The sensor mounting base 3 includes a mounting base housing 31, hollow spiral blades 32, a gas phase ascending pipe 33, a gas phase descending pipe 34, and a liquid storage tank 35. The hollow spiral blades 32 and the gas phase ascending pipe 33 are disposed within the mounting base housing 31. The outer surface of the hollow spiral blades 32 is fixedly fitted to the inner wall of the mounting base housing 31, and the inner surface of the hollow spiral blades 32 is fixedly fitted to the outer wall of the gas phase ascending pipe 33. The gas phase descending pipe 34... One end of the gas phase upward pipe 33 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is connected to the main pipeline 1. The sensor 4 is installed on the top of the mounting base housing 31. The liquid storage tank 35 is sleeved on the bottom of the mounting base housing 31 and is connected to the inner cavity of the mounting base housing 31. One end of the air inlet pipe 2 is connected to the main pipeline 1, and the other end of the air inlet pipe 2 is connected to the mounting base housing 31. One end of the drain pipe 5 is connected to the liquid storage tank 35, and the other end of the drain pipe 5 is connected to the main pipeline 1.

[0037] The upper part of the mounting base housing 31 is cylindrical, and the lower part is an inverted frustum shape. The upper and lower parts are integrally formed, and the lower part extends into the liquid storage tank 35.

[0038] The lower opening of the mounting base housing 31 is lower than the inlet of the drain pipe 5.

[0039] A gap is provided between the top of the gas phase downpipe 34 and the inner top wall of the mounting base housing 31.

[0040] The central axes of the mounting base housing 31, the gas phase upward pipe 33, the gas phase downward pipe 34, and the liquid storage tank 35 coincide.

[0041] The main pipeline 1 includes a main pipeline inlet valve 11, a main pipeline body 12, and a main pipeline outlet valve 15. The main pipeline inlet valve 11 is connected to the inlet end of the main pipeline body 12, and the main pipeline outlet valve 15 is connected to the outlet end of the main pipeline body 12.

[0042] A throat 13 is provided in the middle of the main pipeline body 12, and the throat 13 is connected to the main pipeline body 12.

[0043] This embodiment is another preferred implementation. The device is directly installed on the pipeline to be tested. After testing, the medium directly enters the original pipeline without contact with the outside world and does not need to be discharged into the environment, thus having good environmental protection.

[0044] Example 5 See Figure 1 A gas-liquid separation detection device includes a main pipeline 1, an inlet pipe 2, a drain pipe 5, a sensor mounting base 3, and a sensor 4. The sensor mounting base 3 includes a mounting base housing 31, hollow spiral blades 32, a gas phase ascending pipe 33, a gas phase descending pipe 34, and a liquid storage tank 35. The hollow spiral blades 32 and the gas phase ascending pipe 33 are disposed within the mounting base housing 31. The outer surface of the hollow spiral blades 32 is fixedly fitted to the inner wall of the mounting base housing 31, and the inner surface of the hollow spiral blades 32 is fixedly fitted to the outer wall of the gas phase ascending pipe 33. The gas phase descending pipe 34... One end of the gas phase upward pipe 33 extends into the gas phase upward pipe 33 and is flush with the top of the gas phase upward pipe 33. The other end of the gas phase downward pipe 34 extends out of the mounting base housing 31 and is connected to the main pipeline 1. The sensor 4 is installed on the top of the mounting base housing 31. The liquid storage tank 35 is sleeved on the bottom of the mounting base housing 31 and is connected to the inner cavity of the mounting base housing 31. One end of the air inlet pipe 2 is connected to the main pipeline 1, and the other end of the air inlet pipe 2 is connected to the mounting base housing 31. One end of the drain pipe 5 is connected to the liquid storage tank 35, and the other end of the drain pipe 5 is connected to the main pipeline 1.

[0045] The upper part of the mounting base housing 31 is cylindrical, and the lower part is an inverted frustum shape. The upper and lower parts are integrally formed, and the lower part extends into the liquid storage tank 35.

[0046] The lower opening of the mounting base housing 31 is lower than the inlet of the drain pipe 5.

[0047] A gap is provided between the top of the gas phase downpipe 34 and the inner top wall of the mounting base housing 31.

[0048] The central axes of the mounting base housing 31, the gas phase upward pipe 33, the gas phase downward pipe 34, and the liquid storage tank 35 coincide.

[0049] The main pipeline 1 includes a main pipeline inlet valve 11, a main pipeline body 12, and a main pipeline outlet valve 15. The main pipeline inlet valve 11 is connected to the inlet end of the main pipeline body 12, and the main pipeline outlet valve 15 is connected to the outlet end of the main pipeline body 12.

[0050] More preferably, a throat 13 is provided in the middle of the main pipeline body 12, and the throat 13 is connected to the main pipeline body 12.

[0051] The throat tube 13 has multiple throat tube holes 14 at its outlet end, and the multiple throat tube holes 14 are evenly arranged along the circumference of the throat tube 13.

[0052] A maintenance valve 16 is connected to the outlet end of the main pipeline body 12.

[0053] This embodiment is the best implementation method. Different types of gas detection sensors 4 can be matched according to the required gas phase characteristics to realize online monitoring. The installation and replacement of sensor 4 are quite convenient.

[0054] Example 6 See Figure 1 A method for using a gas-liquid separation detection device is described. The gas-liquid separation detection device is connected in series to the pipeline containing liquid gas to be detected. The maintenance valve 16, the main pipeline inlet valve 11, and the main pipeline outlet valve 15 are closed. The sensor 4 is removed, and clean water is injected along the inner wall of the mounting base housing 31. The sensor 4 is reinstalled, and the main pipeline inlet valve 11 and the main pipeline outlet valve 15 are opened. Under the throttling effect of the throat pipe 13, part of the liquid gas to be detected enters the mounting base housing 31 through the air inlet pipe 2. It flows through the hollow spiral blades 32 and the liquid is collected in the liquid storage tank 35. The gas rises to the sensor 4 through the gas phase upward pipe 33 to complete the detection, and then flows back to the gas phase downward pipe 34. After being drawn by the throat pipe 13, it flows into the main pipeline 1. The liquid in the liquid storage tank 35 flows into the main pipeline 1 through the drain pipe 5.

[0055] The replacement process for sensor 4 is as follows: When sensor 4 needs to be replaced, close the main pipeline inlet valve 11 and the main pipeline outlet valve 15, then open the maintenance valve 16, remove the original sensor 4, install the new sensor 4 on the sensor mounting base 3, then close the maintenance valve 16, open the main pipeline inlet valve 11 and the main pipeline outlet valve 15, and restore normal gas detection.

Claims

1. A gas-liquid separation detection device, comprising a main pipeline (1), an air inlet pipeline (2) and a liquid discharge pipeline (5), characterized in that: It also includes a sensor mounting base (3) and a sensor (4). The sensor mounting base (3) includes a mounting base housing (31), a hollow spiral blade (32), a gas phase upward pipe (33), a gas phase downward pipe (34), and a liquid storage tank (35). The hollow spiral blade (32) and the gas phase upward pipe (33) are disposed inside the mounting base housing (31). The outside of the hollow spiral blade (32) is attached and fixed to the inner wall of the mounting base housing (31), and the inside of the hollow spiral blade (32) is attached and fixed to the outer wall of the gas phase upward pipe (33). One end of the gas phase downward pipe (34) extends into the gas phase upward pipe (33) and is connected to the gas phase upward pipe. The top of the phase upward pipe (33) is flush with the bottom, and the other end of the gas phase downward pipe (34) extends out of the mounting base housing (31) and is connected to the main pipeline (1). The sensor (4) is installed on the top of the mounting base housing (31). The liquid storage tank (35) is fitted onto the bottom of the mounting base housing (31). The liquid storage tank (35) is connected to the inner cavity of the mounting base housing (31). One end of the air inlet pipe (2) is connected to the main pipeline (1), and the other end of the air inlet pipe (2) is connected to the mounting base housing (31). One end of the drain pipe (5) is connected to the liquid storage tank (35), and the other end of the drain pipe (5) is connected to the main pipeline (1). The lower opening of the mounting base housing (31) is lower than the inlet of the drain pipe (5).

2. The gas-liquid separation and detection device according to claim 1, characterized in that: The upper part of the mounting base housing (31) is cylindrical and the lower part is an inverted frustum. The upper and lower parts are integrally formed, and the lower part extends into the liquid storage tank (35).

3. The gas-liquid separation and detection device according to claim 2, characterized in that: A gap is provided between the top of the gas phase downpipe (34) and the inner top wall of the mounting base housing (31).

4. The gas-liquid separation and detection device according to claim 3, characterized in that: The central axes of the mounting base housing (31), the gas phase upward pipe (33), the gas phase downward pipe (34), and the liquid storage tank (35) coincide.

5. The gas-liquid separation and detection device according to claim 4, characterized in that: The main pipeline (1) includes a main pipeline inlet valve (11), a main pipeline body (12) and a main pipeline outlet valve (15). The main pipeline inlet valve (11) is connected to the inlet end of the main pipeline body (12), and the main pipeline outlet valve (15) is connected to the outlet end of the main pipeline body (12).

6. The gas-liquid separation and detection device according to claim 5, characterized in that: A throat (13) is provided in the middle of the main pipeline body (12), and the throat (13) is connected to the main pipeline body (12).

7. The gas-liquid separation and detection device according to claim 6, characterized in that: The throat tube (13) has multiple throat tube holes (14) at its outlet end, and the multiple throat tube holes (14) are evenly arranged along the circumference of the throat tube (13).

8. The gas-liquid separation and detection device according to claim 7, characterized in that: A maintenance valve (16) is connected to the outlet end of the main pipeline body (12).

9. A method of using a gas-liquid separation and detection device, characterized in that: Using the gas-liquid separation detection device as described in claim 8, the gas-liquid separation detection device is connected in series to the liquid-containing gas pipeline to be detected. The maintenance valve (16), the main pipeline inlet valve (11) and the main pipeline outlet valve (15) are closed. The sensor (4) is removed. Clean water is injected along the inner wall of the mounting base housing (31). The sensor (4) is reinstalled. The main pipeline inlet valve (11) and the main pipeline outlet valve (15) are opened. Under the throttling effect of the throat pipe (13), part of the liquid-containing gas to be detected enters the mounting base housing (31) through the air inlet pipe (2). It flows through the hollow spiral blade (32) and the liquid is collected in the liquid storage tank (35). The gas rises to the sensor (4) through the gas phase upward pipe (33) to complete the detection. It then flows back to the gas phase downward pipe (34). After being sucked by the throat pipe (13), it flows into the main pipeline (1). The liquid in the liquid storage tank (35) flows into the main pipeline (1) through the drain pipe (5).

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