Mechanical sampling device for online monitoring of oil and gas recovery

Abstract

The application relates to the technical field of oil and gas sampling, and discloses a mechanical sampling device for online monitoring of oil and gas recovery, which comprises an air inlet pipe and a two-layer pipe arranged at the bottom of the air inlet pipe, a fan-shaped baffle is fixedly connected to the top end of the air inlet pipe in a limited circular frame mode, a two-layer baffle, a three-layer baffle and a four-layer baffle are sequentially and slidably attached to the top end of the fan-shaped baffle away from the limited circular frame, and the same rotating shaft rod is rotationally connected to the side end corners of the fan-shaped baffle, the two-layer baffle, the three-layer baffle and the four-layer baffle. In the application, the opening amplitude of each baffle can be adjusted in sequence according to the dynamic change of the oil and gas flow in the oil and gas pipeline, the flow is precisely controlled in a step-by-step mode, the problems that the sampling deviation is caused by excessively large flow and the sufficient sample cannot be obtained due to excessively small flow are avoided, the collected oil and gas sample can truly reflect the actual working condition in the pipeline, and a precise basis is provided for subsequent online monitoring.

Description

[0001] This invention relates to the field of oil and gas sampling technology, specifically to a mechanical sampling device for online monitoring of oil and gas recovery. Background Technology

[0002] To ensure the efficient operation of the oil and gas recovery system, it is necessary to monitor key parameters such as oil and gas composition and concentration in real time through online monitoring devices. As the core component of the online monitoring system, the mechanical sampling device undertakes the crucial task of accurately obtaining representative samples from the flowing or falling oil and gas mixture. Its sampling performance directly determines the accuracy and reliability of the monitoring data.

[0003] Currently, the mechanical sampling devices used in online monitoring of oil and gas recovery are mainly divided into fixed insertion mechanical sampling devices and bypass mechanical sampling devices. Fixed insertion mechanical sampling devices are the most widely used type. Their core structure includes a sampling tube, a fixed connector, and a simple filter component. The sampling tube is directly inserted into the main oil and gas recovery pipeline. Bypass mechanical sampling devices are designed for high-pressure, high-flow-rate oil and gas recovery scenarios (such as the main oil pipeline of an oil storage depot). A bypass pipeline is opened on the side wall of the oil and gas pipeline through a tee connector, and the sampling device is connected to the bypass pipeline, without being directly inserted into the main pipeline.

[0004] However, the existing mechanical sampling devices for online monitoring of oil and gas recovery still have many technical shortcomings, making it difficult to meet the requirements of accurate monitoring and stable operation. These shortcomings are mainly reflected in the rigid sampling flow rate adjustment mechanism, which cannot dynamically adapt to the oil and gas flow patterns, easily causing sampling deviations; and the disconnect between sampling and pretreatment, making it difficult to achieve effective purification and separation of the sample, resulting in liquid oil droplets and impurities easily entering the detection chain, affecting monitoring accuracy and equipment operational stability. Therefore, this invention proposes a mechanical sampling device for online monitoring of oil and gas recovery. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a mechanical sampling device for online monitoring of oil and gas recovery, which solves the problems of rigid sampling flow regulation mechanism and disconnect between sampling and pretreatment.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a mechanical sampling device for online monitoring of oil and gas recovery, comprising an air inlet pipe and a second-layer pipe disposed at the bottom of the air inlet pipe. A limiting circular frame is detachably mounted on the inner wall of the second-layer pipe on the side opposite to the air inlet pipe. A fan-shaped baffle is fixedly connected to the limiting circular frame facing the top of the air inlet pipe. A second-layer baffle, a third-layer baffle, and a fourth-layer baffle are sequentially slidably attached to the fan-shaped baffle away from the top of the limiting circular frame. One end corner of each of the fan-shaped baffle, the second-layer baffle, the third-layer baffle, and the fourth-layer baffle penetrates through the pipe. It is rotatably connected to the same rotating shaft; a third-layer pipe is detachably assembled on the side of the second-layer pipe away from the air intake pipe, the bottom end of the third-layer pipe is integrally formed with an oil-gas separation chamber, the inner wall of the side of the third-layer pipe away from the oil-gas separation chamber is integrally formed with an air intake bucket, and the side of the air intake bucket facing the oil-gas separation chamber is integrally formed with an oil-gas passage pipe extending into the oil-gas separation chamber; the bottom end of the oil-gas passage pipe, and located on the inner wall of the oil-gas separation chamber, is provided with a gently sloping oil filter bucket, and the outer wall of the gently sloping oil filter bucket is fixedly attached to the inner wall of the oil-gas separation chamber.

[0007] Preferably, the limiting circular frame has four sets of limiting blocks II integrally formed along its circumference on the side facing the inner wall of the second-layer pipe fitting. The second-layer pipe fitting has a lower locking block groove adapted to be embedded in the limiting blocks II at the corresponding position. The second-layer pipe fitting has a circular groove I on the side perpendicular to the lower locking block groove. A sliding anti-wear kit is fixedly fitted on the circular groove I. The sliding anti-wear kit has an upper locking block groove adapted to be embedded in the limiting blocks II at the corresponding position. The second-layer pipe fitting has two layers of sealing rings detachably fitted on the side facing the air intake pipe fitting. The top of the two layers of sealing rings is tightly fitted to the bottom of the air intake pipe fitting.

[0008] Preferably, the outer walls of the second, third, and fourth baffles are all slidably fitted to the inner wall of the circular groove; the top of the fan-shaped baffle, the second baffle, and the third baffle are all provided with a sliding groove along the circumferential direction; the bottom of the second, third, and fourth baffles are all integrally formed with a slider extending into the corresponding sliding groove, and the slider slides in cooperation with the sliding groove.

[0009] Preferably, a motor is fixedly connected to the side of the limiting circular frame away from the fan-shaped baffle, and the rotating end of the motor extends into the interior of the limiting circular frame and is connected to the rotating shaft for transmission; a sensing and control cavity is integrally formed on the outer wall of the side of the second-layer pipe away from the fan-shaped baffle.

[0010] Preferably, a triangular leg bracket is fixedly connected to the side of the gently sloping oil filter bucket facing the three-layer pipe fitting, and a filtration chamber is fixedly fitted to the side of the triangular leg bracket away from the gently sloping oil filter bucket. The filtration chamber is located at the top of the inner wall of the oil-gas separation chamber. One end of the oil-gas passage pipe extends into the oil-gas separation chamber, passes through the filtration chamber, and is inserted and fixed at the center position of the triangular leg bracket. The inner wall of the filtration chamber is tightly fitted to the outer wall of the oil-gas passage pipe.

[0011] Preferably, the gently sloping oil filter bucket has six sets of elongated grooves along its circumference on the side facing the filtration chamber, and oil seepage ports are provided on the side of the elongated grooves away from the triangular leg support. Multiple sets of air passage holes are provided on the side of the gently sloping oil filter bucket perpendicular to the elongated grooves. An air outlet pipe is inserted into and fixedly connected to the outer wall of the oil-gas separation chamber on the side away from the top of the filtration chamber.

[0012] Preferably, an oil-collecting hopper is detachably mounted on the side of the oil-gas separation chamber opposite to the three-layer pipe fitting. The side of the oil-gas separation chamber facing the oil-gas separation chamber has a circular groove II adapted for its installation. A circular baffle is integrally formed on the inner wall of the circular groove II. The circular baffle extends into the oil-gas separation chamber from the side opposite to the oil-collecting hopper and is fixedly fitted to the bottom end of the gently sloping oil filter bucket. A three-layer sealing ring is detachably fitted on the side of the three-layer pipe fitting facing the two-layer pipe fitting. The top of the three-layer sealing ring is tightly fitted to the bottom end of the two-layer pipe fitting. An oil guide bend is inserted into and fixedly connected to the outer wall of the side of the oil-collecting hopper opposite to the gas outlet pipe.

[0013] Preferably, the oil hopper is detachably equipped with an online monitoring mechanism on the side opposite to the three-layer pipe fitting, and the end of the gas outlet pipe opposite to the three-layer pipe fitting is inserted into and fixedly connected to the top of the online monitoring mechanism; the online monitoring mechanism is fixedly connected to fixed brackets on both sides perpendicular to the top of the oil-gas separation chamber, and the inner side wall of the fixed bracket is detachably snapped and fixed to the outer side wall of the oil-gas separation chamber.

[0014] Preferably, the air intake pipe is integrally formed on the outer wall of one side perpendicular to the top of the second-layer pipe, and the inner wall of the air intake pipe is detachably fitted with a filter screen; the outer wall of the filter screen facing the air intake pipe is integrally formed with six sets of limiting blocks one along its circumference, and the air intake pipe is provided with a limiting groove adapted to its embedding at the position of the limiting block one, and the limiting block one engages with the limiting groove.

[0015] In summary, the technical effects and advantages of this invention are as follows: In this invention, a second-layer pipe fitting is detachably assembled at the bottom of the intake pipe fitting, and a fan-shaped baffle is fixedly installed inside the second-layer pipe fitting via a limiting circular frame. Using the fan-shaped baffle as a fixed base, its top is sequentially connected to a second-layer baffle, a third-layer baffle, and a fourth-layer baffle. The end corners of the four sets of plates are axially rotated via a rotating shaft. Complete rotation allows them to be assembled into a complete circular baffle, closing the sampling channel; partial rotation allows for flexible adjustment of the opening size. This design can drive each baffle to sequentially adjust its opening width according to the dynamic changes in the oil and gas flow rate within the oil and gas pipeline, achieving precise step-like flow control. This avoids sampling deviations caused by excessive flow and insufficient sample acquisition due to insufficient flow, ensuring that the collected oil and gas samples accurately reflect the actual operating conditions within the pipeline and providing a precise foundation for subsequent online monitoring.

[0016] A three-layer pipe fitting is detachably assembled at the bottom of the two-layer pipe fitting. The integrated oil-gas separation chamber at the bottom of the three-layer pipe fitting serves as a pretreatment space. A gently sloping oil filter bucket is installed at the bottom of the oil-gas separation chamber. Simultaneously, a stable oil-gas inlet channel is formed between the air inlet bucket within the three-layer pipe fitting and the oil-gas passage pipe. After the oil and gas are collected by the air inlet bucket, they flow directly to the top of the gently sloping oil filter bucket through the oil-gas passage pipe. Liquid oil droplets in the oil and gas adhere to the surface of the gently sloping oil filter bucket, and after gravity deposition, drip into the oil collection bucket for recycling. The purified gaseous oil and gas are discharged upwards through the air vents of the gently sloping oil filter bucket and enter the subsequent online monitoring mechanism. This pretreatment structure requires no additional power, achieving gas-liquid separation solely through mechanical structure and gravity. This effectively prevents liquid oil droplets and impurities from entering the detection link, reducing detection errors, while also preventing pipe blockage and component wear, extending the overall service life of the monitoring device.

[0017] The intake pipe, the second-layer pipe, the second-layer pipe, the third-layer pipe, the oil-gas separation chamber, and the oil collection hopper all adopt a detachable assembly method. Combined with limiting blocks and seals, disassembly and assembly are convenient, facilitating subsequent cleaning, replacement, and maintenance of each component without requiring complete disassembly, significantly reducing maintenance difficulty and costs. Furthermore, the detachable design of each component allows for flexible replacement with compatible parts to meet the needs of different oil-gas recovery scenarios, improving the device's versatility and adaptability to oil-gas pipelines of different diameters and flow rates. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a mechanical sampling device for online monitoring of oil and gas recovery according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the air intake pipe, the second-layer pipe, the third-layer pipe, the oil hopper, the fan-shaped baffle, and the gently sloping oil filter bucket of the present invention. Figure 3 This is an exploded view of the overall structure of the air intake pipe, the second-layer pipe, the third-layer pipe, the oil hopper, the fan-shaped baffle, and the gently sloping oil filter bucket of the present invention. Figure 4 This is a schematic diagram of the overall structure of the intake pipe fitting of the present invention; Figure 5 This is an exploded view of the overall structure of the two-layer pipe fitting and the fan-shaped baffle of the present invention; Figure 6 This is an exploded bottom view of the overall structure of the two-layer pipe fitting and the fan-shaped baffle of the present invention; Figure 7 This is an exploded view of the overall structure of the three-layer pipe fittings, filtration chamber, and gently sloping oil filter bucket of the present invention. Figure 8 This is a schematic cross-sectional view of the overall structure of the three-layer pipe fittings, filtration chamber, and gently sloping oil filter bucket of the present invention. Figure 9 This is a schematic diagram of the overall structure of the oil container of the present invention.

[0019] In the diagram: 1. Intake pipe fitting; 101. Intake pipe connector; 102. Air filter disc; 103. Limiting groove; 104. Limiting block one; 2. Second-layer fitting; 201. Sensor control chamber; 202. Circular groove one; 203. Lower locking block groove; 204. Smooth anti-wear kit; 205. Upper locking block groove; 206. Second-layer sealing ring; 3. Third-layer fitting; 301. Oil-gas separation chamber; 302. Air outlet duct; 303. Third-layer sealing ring; 304. Intake hopper; 305. Oil-gas passage pipe; 4. 401. Oil hopper; 402. Oil guide bend; 403. Circular groove II; 404. Circular baffle; 5. Online monitoring mechanism; 501. Fixed bracket; 6. Fan-shaped baffle; 601. Two-layer baffle; 602. Three-layer baffle; 603. Four-layer baffle; 604. Limiting circular frame; 605. Limiting block II; 606. Rotating shaft; 607. Motor; 7. Filtration chamber; 8. Sloping oil filter bucket; 801. Triangular leg bracket; 802. Air vent; 803. Long groove; 804. Oil seepage port. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] refer to Figures 1-9 The mechanical sampling device for online monitoring of oil and gas recovery shown includes an air inlet pipe 1 and a double-layer pipe 2 located at the bottom of the air inlet pipe 1. A specific embodiment is shown below: Example

[0022] This embodiment includes the assembly and mating of the intake pipe 1 and the secondary pipe 2, as well as the flow control structure inside the secondary pipe 2. This enables flexible and precise adjustment of the oil and gas flow rate, and adapts to sampling requirements under different operating conditions, as detailed below: The bottom of the intake pipe 1 and the second-layer pipe 2 are detachably assembled, which facilitates later disassembly and maintenance. The side of the second-layer pipe 2 facing the intake pipe 1 is detachably fitted with a second-layer sealing ring 206. The top of the second-layer sealing ring 206 is tightly fitted with the bottom of the intake pipe 1, which effectively improves the sealing performance of the connection between the two and prevents oil and gas leakage. A limiting circular frame 604 is detachably mounted on the inner wall of the side of the second-layer pipe fitting 2 facing away from the intake pipe fitting 1. Four sets of limiting blocks 605 are integrally formed along the circumference of the side of the limiting circular frame 604 facing the inner wall of the second-layer pipe fitting 2. The second-layer pipe fitting 2 has a lower locking block groove 203 adapted to be embedded in the limiting block 605 at the corresponding position. At the same time, a circular groove 202 is opened on the side of the second-layer pipe fitting 2 perpendicular to the lower locking block groove 203. A sliding anti-wear kit 204 is fixedly fitted on the circular groove 202. The sliding anti-wear kit 204 has an upper locking block groove 205 adapted to be embedded in the limiting block 605 at the corresponding position. The limiting block 605 is simultaneously embedded in the lower locking block groove 203 and the upper locking block groove 205, so as to achieve a stable assembly of the limiting circular frame 604 in the second-layer pipe fitting 2 and prevent it from shifting during operation.

[0023] A fan-shaped baffle 6 is fixedly connected to the top of the limiting circular frame 604 facing the intake pipe 1. The fan-shaped baffle 6 serves as a fixed base, and a second-layer baffle 601, a third-layer baffle 602, and a fourth-layer baffle 603 are slidably attached to the top of the limiting circular frame 604 in sequence. The same rotating shaft 606 passes through and is rotatably connected to one end corner of each of the four sets of plates, enabling axial rotation of the four sets of plates. The top of the fan-shaped baffle 6, the second-layer baffle 601, and the third-layer baffle 602 are all provided with grooves along the circumferential direction. The bottom of the second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 are all integrally formed with sliders extending into the corresponding grooves. The sliders slide in the grooves to ensure smooth and stable rotation of each baffle and avoid jamming. A motor 607 is fixedly connected to the side of the limiting round frame 604 away from the fan-shaped baffle 6. The rotating end of the motor 607 extends into the interior of the limiting round frame 604 and is connected to the rotating shaft 606 for transmission. The outer wall of the second-layer pipe 2 away from the fan-shaped baffle 6 is integrally formed with a sensing and control cavity 201, which is used to install control components to achieve precise control of the motor 607.

[0024] During operation, the control components inside the sensor control chamber 201 control the motor 607 to start based on changes in oil and gas flow. The motor 607 drives the rotating shaft 606 to rotate, which in turn causes the second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 to rotate around the rotating shaft 606. By adjusting the rotation angle of each baffle, the size of the opening formed by the four sets of plates is changed, achieving step-like control of the flow rate. When the oil and gas flow rate is high, the rotation of each baffle is controlled to reduce the opening width and avoid sampling deviation; when the oil and gas flow rate is low, the opening width of each baffle is adjusted to ensure that a sufficient amount of representative sample is obtained. No manual intervention is required throughout the process, and the adjustment is precise and convenient. Example

[0025] This embodiment includes the indirect connection between the two-layer pipe fitting 2 and the gently sloping oil filter bucket 8, relying on the three-layer pipe fitting 3, oil-gas separation chamber 301, and other structures. It achieves efficient pretreatment of oil and gas, removes liquid oil droplets and impurities from the oil and gas, and ensures sampling accuracy, as detailed below: A three-layer pipe fitting 3 is detachably mounted on the side of the second-layer pipe fitting 2 facing away from the air intake pipe fitting 1. A three-layer sealing ring 303 is detachably fitted on the side of the third-layer pipe fitting 3 facing the second-layer pipe fitting 2. The top of the three-layer sealing ring 303 fits tightly with the bottom of the second-layer pipe fitting 2 to ensure the sealing of the connection and prevent oil and gas leakage. An oil and gas separation chamber 301 is integrally formed at the bottom of the third-layer pipe fitting 3, which serves as the core space for oil and gas pretreatment. An air intake hopper 304 is integrally formed on the inner wall of the side of the third-layer pipe fitting 3 facing away from the oil and gas separation chamber 301. An oil and gas passage pipe 305 extending into the oil and gas separation chamber 301 is integrally formed on the side of the air intake hopper 304 facing the oil and gas separation chamber 301. The air intake hopper 304 is used to collect oil and gas, and the oil and gas passage pipe 305 is used to stably transport oil and gas into the oil and gas separation chamber 301.

[0026] At the bottom end of the oil-gas pipe 305, and on the inner wall of the oil-gas separation chamber 301, is a gently sloping oil filter bucket 8. The outer wall of the gently sloping oil filter bucket 8 is fixedly fitted to the inner wall of the oil-gas separation chamber 301 to ensure a stable assembly. A triangular leg bracket 801 is fixedly connected to the side of the gently sloping oil filter bucket 8 facing the three-layer pipe fitting 3. A filtration chamber 7 is fixedly fitted to the side of the triangular leg bracket 801 away from the gently sloping oil filter bucket 8. The filtration chamber 7 is located at the top of the inner wall of the oil-gas separation chamber 301. One end of the oil-gas pipe 305 extends into the oil-gas separation chamber 301, passes through the filtration chamber 7, and is inserted and fixed at the center of the triangular leg bracket 801. The inner wall of the filtration chamber 7 is tightly fitted to the outer wall of the oil-gas pipe 305, achieving precise docking between the oil-gas pipe 305 and the gently sloping oil filter bucket 8.

[0027] The gently sloping oil filter bucket 8 has six sets of elongated grooves 803 along its circumference on the side facing the filtration chamber 7. An oil seepage port 804 is provided on the side of the elongated grooves 803 away from the triangular leg support 801. Multiple sets of air passage holes 802 are provided on the side of the gently sloping oil filter bucket 8 perpendicular to the elongated grooves 803. An air outlet pipe 302 is inserted into and fixedly connected to the outer wall of the oil-gas separation chamber 301 away from the top of the filtration chamber 7. During operation, the oil and gas are collected in the air inlet hopper 304 and then flow directly to the top of the gently sloping oil filter bucket 8 through the oil and gas pipe 305. The liquid oil droplets in the oil and gas will adhere to the surface of the gently sloping oil filter bucket 8 and slide down the gentle slope under the action of gravity. After being collected in the long groove 803, they drip from the oil seepage port 804, completing the separation and collection of liquid oil droplets. The purified gaseous oil and gas are discharged upward through the air outlet 802 and transported to the subsequent online monitoring unit 5 through the air outlet pipe 302, realizing the efficient pretreatment of oil and gas and preventing liquid oil droplets and impurities from entering the detection link. Example

[0028] This embodiment includes the transmission cooperation between the baffle assembly and the motor 607, combined with the sliding structure of the slide groove and the slider. This achieves smooth and precise linkage for flow control, and ensures the stability and reliability of the sampling process, as detailed below: A fan-shaped baffle 6, a second-layer baffle 601, a third-layer baffle 602, and a fourth-layer baffle 603 constitute a complete flow control baffle assembly. The fan-shaped baffle 6 is fixedly connected to the top of the limiting circular frame 604. The second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 are slidably attached to the top of the fan-shaped baffle 6 in sequence. One end corner of each of the four sets of plates is rotatably connected to the same rotating shaft 606, enabling synchronous rotation adjustment. The top of the fan-shaped baffle 6, the second-layer baffle 601, and the third-layer baffle 602 are all provided with circumferential grooves. The bottom of the second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 are all integrally formed with sliders extending into the corresponding grooves. The sliders slide and the grooves, allowing the baffles to cooperate with each other during rotation, avoiding problems such as offset and jamming, and ensuring precise adjustment of the opening size.

[0029] A motor 607 is fixedly connected to the side of the limiting circular frame 604 opposite to the fan-shaped baffle 6. The rotating end of the motor 607 extends into the interior of the limiting circular frame 604 and is connected to the rotating shaft 606 for transmission. The motor 607 serves as a power source, providing power for the rotation of the baffle assembly. A sensing and control cavity 201 is integrally formed on the outer wall of the side of the second-layer pipe fitting 2 opposite to the fan-shaped baffle 6. A control module and a flow rate detection component are installed inside the sensing and control cavity 201. The flow rate detection component detects the oil and gas flow rate in real time and transmits the detection signal to the control module. The control module precisely controls the rotation angle and speed of the motor 607 based on the flow rate signal.

[0030] When the flow rate detection component detects that the oil and gas flow rate exceeds the preset range, the control module controls the motor 607 to start. The motor 607 drives the rotating shaft 606 to rotate, which in turn drives the second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 to rotate synchronously, adjusting the opening width of each baffle until the flow rate reaches the preset range. When the flow rate stabilizes within the preset range, the motor 607 stops working, and the baffle assembly maintains its current opening state, achieving automatic and precise flow control. Simultaneously, the sliding anti-wear kit 204 is fitted onto the circular groove 202. The outer walls of the second-layer baffle 601, the third-layer baffle 602, and the fourth-layer baffle 603 all slide against the inner wall of the circular groove 202. The sliding anti-wear kit 204 reduces friction between the baffles and the circular groove 202, extending the service life of the components, while ensuring smooth baffle sliding, further improving the stability of flow control. Example

[0031] This embodiment includes the assembly and fitting of various components inside the oil-gas separation chamber 301, integrating structures such as the gently sloping oil filter bucket 8, the filtration chamber 7, and the oil collection hopper 4. This achieves efficient linkage in oil-gas pretreatment and improves the operational stability and environmental friendliness of the device, as detailed below: The oil-gas separation chamber 301 is integrally formed at the bottom of the three-layer pipe fitting 3. A filtration chamber 7 is located at its top. The filtration chamber 7 is supported and fixed to the gently sloping oil filter bucket 8 via a triangular leg bracket 801. The triangular leg bracket 801 is fixedly connected to the side of the gently sloping oil filter bucket 8 facing the three-layer pipe fitting 3, while the filtration chamber 7 is fixedly fitted to the side of the triangular leg bracket 801 away from the gently sloping oil filter bucket 8, ensuring a stable assembly between the filtration chamber 7 and the gently sloping oil filter bucket 8. One end of the oil-gas passage pipe 305 extends into the oil-gas separation chamber 301, passes through the filtration chamber 7, and is inserted and fixed at the center of the triangular leg bracket 801. The inner wall of the filtration chamber 7 is tightly fitted to the outer wall of the oil-gas passage pipe 305, achieving precise oil and gas delivery. Simultaneously, the filtration chamber 7 can perform preliminary filtration of the oil and gas, removing some fine impurities.

[0032] The outer wall of the gently sloping oil filter bucket 8 is fixedly attached to the inner wall of the oil-gas separation chamber 301. Six sets of elongated grooves 803 are opened along the circumferential direction on the side facing the filtration chamber 7. An oil seepage port 804 is opened on the side of the elongated grooves 803 away from the triangular leg support 801. Multiple sets of air passage holes 802 are opened on the side of the gently sloping oil filter bucket 8 perpendicular to the elongated grooves 803. The elongated grooves 803 are used to collect liquid oil droplets, the oil seepage port 804 is used to discharge liquid oil droplets, and the air passage holes 802 are used to discharge gaseous oil and gas, thereby realizing gas-liquid separation. An oil hopper 4 is detachably mounted on the side of the oil-gas separation chamber 301 away from the three-layer pipe fitting 3. The side of the oil hopper 4 facing the oil-gas separation chamber 301 has a circular groove 402 adapted to be installed therein. A circular baffle 403 is integrally formed on the inner wall of the circular groove 402. The side of the circular baffle 403 away from the oil hopper 4 extends into the oil-gas separation chamber 301 and is fixedly attached to the bottom end of the gently sloping oil filter bucket 8. It is used to receive liquid oil droplets dripping from the oil seepage port 804, so as to realize the recycling and reuse of liquid oil.

[0033] An oil-collecting hopper 4 has an oil guide bend 401 inserted and fixedly connected to the outer wall of the side opposite to the outlet conduit 302. This bend is used to export and recycle the liquid oil collected in the oil-collecting hopper 4, avoiding resource waste and secondary environmental pollution. An outlet conduit 302 is inserted and fixedly connected to the outer wall of the oil-gas separation chamber 301 opposite to the top of the filtration chamber 7. This bend is used to transport the purified gaseous oil and gas to the online monitoring mechanism 5. The online monitoring mechanism 5 is detachably mounted on the side of the oil-collecting hopper 4 opposite to the three-layer pipe fitting 3. The online monitoring mechanism 5 is fixedly connected to two fixed brackets 501 on both sides perpendicular to the top of the oil-gas separation chamber 301. The inner side wall of the fixed bracket 501 is detachably snapped and fixed to the outer side wall of the oil-gas separation chamber 301, ensuring that the online monitoring mechanism 5 is stably assembled. This achieves efficient linkage between sampling, pretreatment, and monitoring, improving the overall operational stability of the device.

[0034] Working principle of this invention: During operation, the oil and gas first enter the device through the intake pipe 101 of the intake pipe 1. The filter screen 102 inside the intake pipe 101 is fixed by the engagement of the limiting block 104 and the limiting groove 103, thus performing preliminary filtration of the oil and gas, intercepting large particulate impurities and preventing them from entering subsequent pipelines and causing blockages. The filtered oil and gas then enter the connection area between the intake pipe 1 and the secondary pipe 2. The secondary sealing ring 206 ensures the tightness of the connection between the two, preventing oil and gas leakage.

[0035] After the oil and gas enter the secondary pipe fitting 2, the control components and flow rate detection components in the sensing and control chamber 201 monitor the oil and gas flow rate in real time, and control the motor 607 to start according to the flow rate changes. The rotating end of the motor 607 drives the rotating shaft 606 to rotate, which in turn drives the secondary baffle 601, the tertiary baffle 602 and the quaternary baffle 603 associated with the fan-shaped baffle 6 to rotate in sequence. By adjusting the rotation angle of each baffle, the opening size is changed, and the flow rate is controlled in a stepped manner. The limiting circular frame 604 is fixed in the secondary pipe fitting 2 through the fitting of the limiting block 2 605 with the lower block groove 203 and the upper block groove 205, providing stable support for the baffle assembly. At the same time, the sliding anti-wear kit 204 reduces the friction between the baffle and the circular groove 202, ensuring smooth adjustment.

[0036] After flow control, the oil and gas enter the three-layer pipe fitting 3, and the three-layer sealing ring 303 ensures the sealed connection between the two-layer pipe fitting 2 and the three-layer pipe fitting 3. After being collected by the air inlet hopper 304, the oil and gas are transported to the inside of the oil and gas separation chamber 301 through the oil and gas pipe 305. The oil and gas pipe 305 passes through the filtration chamber 7 and is fixed at the center of the triangular leg bracket 801.

[0037] After the oil and gas are discharged from the bottom of the oil and gas inlet pipe 305, they rush directly to the top of the gently sloping oil filter bucket 8. The liquid oil droplets in the oil and gas adhere to the surface of the gently sloping oil filter bucket 8 and slide down the gentle slope under the action of gravity. After being collected by the elongated groove 803, they drip from the oil seepage port 804 onto the circular baffle 403, and then flow into the oil collection bucket 4. Finally, they are discharged and recovered through the oil guide bend pipe 401. The purified gaseous oil and gas are discharged upward through the air passage 802 on the gently sloping oil filter bucket 8. The filtration chamber 7 performs secondary filtration on the oil and gas to remove fine impurities. After that, it is transported to the online monitoring unit 5 through the air outlet pipe 302.

[0038] The online monitoring unit 5 is fixed to the oil-gas separation chamber 301 by a fixed bracket 501, and monitors the purified oil-gas sample in real time. The oil hopper 4 is detachably assembled with the oil-gas separation chamber 301 by a circular groove 402, which facilitates later cleaning and maintenance.

[0039] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanical sampling device for online monitoring of oil and gas recovery, comprising an air inlet pipe (1) and a double-layer pipe (2) disposed at the bottom of the air inlet pipe (1), characterized in that: The inner wall of the second-layer pipe fitting (2) facing away from the intake pipe fitting (1) is detachably fitted with a limiting round frame (604). The limiting round frame (604) is fixedly connected to the top of the intake pipe fitting (1) with a fan-shaped baffle (6). The fan-shaped baffle (6) facing away from the top of the limiting round frame (604) is sequentially fitted with a second-layer baffle (601), a third-layer baffle (602), and a fourth-layer baffle (603). The same rotating shaft (606) passes through and rotatably connects one end corner of the fan-shaped baffle (6), the second-layer baffle (601), the third-layer baffle (602), and the fourth-layer baffle (603). The inner wall of the second-layer pipe fitting (2) facing away from the intake pipe fitting (1) is detachably fitted with a limiting round frame (604). The side is detachably equipped with a three-layer pipe fitting (3). The bottom end of the three-layer pipe fitting (3) is integrally formed with an oil-gas separation chamber (301). The inner wall of the side of the three-layer pipe fitting (3) away from the oil-gas separation chamber (301) is integrally formed with an air inlet (304). The side of the air inlet (304) facing the oil-gas separation chamber (301) is integrally formed with an oil-gas passage pipe (305) extending into the oil-gas separation chamber (301). The bottom end of the oil-gas passage pipe (305) and the inner wall of the oil-gas separation chamber (301) are provided with a gently sloping oil filter bucket (8). The outer wall of the gently sloping oil filter bucket (8) is fixedly attached to the inner wall of the oil-gas separation chamber (301).

2. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 1, characterized in that: The limiting circular frame (604) has four sets of limiting blocks (605) integrally formed along its circumference on the side facing the inner wall of the second-layer pipe fitting (2). The second-layer pipe fitting (2) has a lower locking block groove (203) adapted to be embedded in the limiting blocks (605) at the corresponding position. The second-layer pipe fitting (2) has a circular groove (202) on the side perpendicular to the lower locking block groove (203). A sliding anti-wear kit (204) is fixedly fitted on the circular groove (202). The sliding anti-wear kit (204) has an upper locking block groove (205) adapted to be embedded in the corresponding position of the limiting blocks (605). The second-layer pipe fitting (2) has a detachable sealing ring (206) on the side facing the air intake pipe fitting (1). The top of the sealing ring (206) is tightly fitted to the bottom of the air intake pipe fitting (1).

3. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 2, characterized in that: The outer walls of the second-layer baffle (601), the third-layer baffle (602), and the fourth-layer baffle (603) are all slidably attached to the inner wall of the circular groove (202); the top of the fan-shaped baffle (6), the second-layer baffle (601), and the third-layer baffle (602) are all provided with a sliding groove along the circumferential direction; the bottom of the second-layer baffle (601), the third-layer baffle (602), and the fourth-layer baffle (603) are all integrally formed with a slider extending into the corresponding sliding groove, and the slider slides in cooperation with the sliding groove.

4. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 1, characterized in that: The limiting round frame (604) is fixedly connected to a motor (607) on the side away from the fan-shaped baffle (6). The rotating end of the motor (607) extends into the interior of the limiting round frame (604) and is connected to the rotating shaft (606) in a transmission connection. The outer wall of the second-layer pipe fitting (2) away from the fan-shaped baffle (6) is integrally formed with a sensing and control cavity (201).

5. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 1, characterized in that: The gently sloping oil filter bucket (8) is fixedly connected to a triangular leg bracket (801) on the side facing the three-layer pipe fitting (3). The side of the triangular leg bracket (801) away from the gently sloping oil filter bucket (8) is fixedly fitted with a filtration chamber (7). The filtration chamber (7) is located at the top of the inner wall of the oil-gas separation chamber (301). The oil-gas pipe (305) extends to one end of the oil-gas separation chamber (301), passes through the filtration chamber (7), and is inserted and fixed at the center of the triangular leg bracket (801). The inner wall of the filtration chamber (7) is tightly fitted with the outer wall of the oil-gas pipe (305).

6. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 5, characterized in that: The gently sloping oil filter bucket (8) has six sets of elongated grooves (803) along its circumference on the side facing the filtration chamber (7). The elongated grooves (803) have oil seepage ports (804) on the side away from the triangular leg support (801). The gently sloping oil filter bucket (8) has multiple sets of air passage holes (802) on the side perpendicular to the elongated grooves (803). The oil-gas separation chamber (301) has an air outlet pipe (302) inserted into and fixedly connected to the outer wall on the side away from the top of the filtration chamber (7).

7. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 6, characterized in that: The oil-gas separation chamber (301) is detachably fitted with an oil hopper (4) on the side away from the three-layer pipe fitting (3). The oil hopper (4) has a circular groove (402) adapted to be installed on the side facing the oil-gas separation chamber (301). A circular baffle (403) is integrally formed on the inner wall of the circular groove (402). The circular baffle (403) extends into the oil-gas separation chamber (301) on the side away from the oil hopper (4) and is fixedly attached to the bottom end of the gently sloping oil filter bucket (8). The three-layer pipe fitting (3) is detachably fitted with a three-layer sealing ring (303) on the side facing the two-layer pipe fitting (2). The top end of the three-layer sealing ring (303) is tightly attached to the bottom end of the two-layer pipe fitting (2). An oil guide bend (401) is inserted into and fixedly connected to the outer wall of the oil hopper (4) on the side away from the gas outlet pipe (302).

8. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 7, characterized in that: The oil hopper (4) is detachably equipped with an online monitoring mechanism (5) on the side away from the three-layer pipe (3). The end of the gas outlet pipe (302) away from the three-layer pipe (3) is inserted into and fixedly connected to the top of the online monitoring mechanism (5). The online monitoring mechanism (5) is fixedly connected to fixed brackets (501) on both sides of the top of the oil-gas separation chamber (301). The inner wall of the fixed bracket (501) is detachably snapped and fixed to the outer wall of the oil-gas separation chamber (301).

9. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 1, characterized in that: The air intake pipe (1) has an air intake pipe (101) integrally formed on the outer wall of one side perpendicular to the top of the second-layer pipe (2), and the inner wall of the air intake pipe (101) is detachably fitted with an air filter screen (102).

10. The mechanical sampling device for online monitoring of oil and gas recovery according to claim 9, characterized in that: The filter screen (102) has six sets of limiting blocks (104) integrally formed on the outer wall of the air inlet pipe (101) along its circumference. The air inlet pipe (101) has a limiting groove (103) adapted to the position of the limiting block (104). The limiting block (104) and the limiting groove (103) are engaged and cooperated.

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