Oil and gas pipeline fluid flow simulation platform

Abstract

The invention belongs to the technical field of fluid pipeline simulation tests, and particularly relates to an oil and gas pipeline fluid flow simulation table which comprises a table body, a liquid recovery tank and a main circulation pipeline, a conveying pump, a first pressure gauge and a first gas injection mechanism are sequentially arranged on the main circulation pipeline, and two sets of branch circulation pipelines are connected to one side of the main circulation pipeline in a penetrating mode. An environment simulation mechanism is connected to the branch circulation pipeline, and a first flow control valve, a second gas injection mechanism, a second pressure gauge, a third pressure gauge and a second flow control valve are sequentially arranged on the portions, located on the branch circulation pipeline, of the two sides of the environment simulation mechanism. A certain proportion of pulse gas is injected into the main circulation pipeline and the branch circulation pipeline through the first gas injection mechanism and the second gas injection mechanism, the phenomenon that slug flow often occurs in the mixed transportation pipeline can be simulated, the pressure of the pipeline and the instantaneous gas-liquid flow rate of an outlet of the pipeline in the slug flow state can fluctuate greatly, and strong vibration is accompanied. And the oil and gas pipeline can be simulated and detected in the special state.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid pipeline simulation tests, and particularly relates to a fluid flow simulation platform for oil and gas pipelines. Background Art

[0002] During the oil and gas field exploitation process, the mixture of crude oil, water, and natural gas flows upward through the wellbore to the ground. With the changes in parameters such as the exploitation pressure and flow rate, the flow characteristic parameters such as the pressure loss and flow state of the oil-gas-water mixture change accordingly. The flow characteristics directly affect the operation cost. At the same time, if hydrates, wax deposits, etc. occur, it may cause safety production accidents. Therefore, studying the flow characteristics of multiphase flow in oil and gas pipelines is of great significance for improving efficiency, reducing consumption, and ensuring flow safety.

[0003] When the multiphase fluid in the pipeline alternates and flows in slug flow, the pressure on the pipeline and the instantaneous gas-liquid flow rate at the pipeline outlet will have large fluctuations, and there will be strong vibrations, which will cause great damage to the pipeline and the equipment connected to the pipeline. The existing fluid flow simulation platforms for oil and gas pipelines cannot simulate slug flow, resulting in incomplete simulation detection data. Moreover, the existing fluid flow simulation platforms for oil and gas pipelines have a single simulation test working condition and cannot well simulate the special working conditions in the field.

[0004] To solve the above problems, a fluid flow simulation platform for oil and gas pipelines is proposed in this application. Summary of the Invention

[0005] The present invention provides a fluid flow simulation platform for oil and gas pipelines, which can effectively solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A fluid flow simulation platform for oil and gas pipelines includes a platform body, a liquid recovery tank, and a main circulation pipeline. A delivery pump, a first pressure gauge, and a first gas injection mechanism are sequentially arranged on the main circulation pipeline. Two groups of branch circulation pipelines are connected to the main circulation pipeline on one side in a through manner. An environment simulation mechanism is connected to the branch circulation pipelines. A first flow control valve, a second gas injection mechanism, a second pressure gauge, a third pressure gauge, and a second flow control valve are sequentially arranged on the branch circulation pipelines on both sides of the environment simulation mechanism.

[0007] The environment simulation mechanism includes a housing body and a sealing cover fixedly arranged on the top of the platform body through a bracket. A unitary pressurization mechanism is arranged on the sealing cover. A water flow simulation mechanism is arranged on the outer side of the housing body. Two groups of spacer plates are symmetrically and fixedly arranged in the inner cavity of the housing body. A simulation detection cavity is formed between the two groups of spacer plates. Quick connection mechanisms are symmetrically arranged on both sides of the simulation detection cavity. An oil and gas pipeline is clamped and connected between the two groups of quick connection mechanisms.

[0008] Preferably, the liquid recovery tank includes a tank body with a sealed cover plate at the top feed port and a stirring device arranged in the inner cavity of the tank. The top end of the tank body is connected with an exhaust pipe member, and a vacuum pump is provided on the exhaust pipe member.

[0009] Preferably, both the first air injection mechanism and the second air injection mechanism include an air injection pipe member, and a one-way check valve, a first solenoid valve and a quick connector are provided on the air injection pipe member. The quick connector is used for quickly connecting to a high-pressure gas tank.

[0010] Preferably, the sealing cover is fixedly installed on the top of the outer shell through screws, and a sealing gasket is provided between the sealing cover and the outer shell.

[0011] Preferably, the unitary pressurization mechanism includes a shunt pipe and an aggregation box fixedly arranged at the top of the inner cavity of the sealing cover. The shunt pipe and the aggregation box are connected through a pipeline in a through manner, and a second solenoid valve is provided on the connected pipeline. A pressure injection nozzle is provided at the top of the shunt pipe. The bottom end of the aggregation box is connected with a top pressure assembly through a pipeline in a through manner, and a third solenoid valve is provided on the connected pipeline. A pressure sensor and a release port are provided on the aggregation box, and a fourth solenoid valve is provided on the release port.

[0012] Preferably, the top pressure assembly includes a cylinder body fixedly connected to the bottom of the aggregation box through a bracket. A top rod is inserted in the cylinder body. Piston plates and a pressing head are respectively fixedly arranged at the upper and lower ends of the top rod. A return spring is sleeved outside the top rod.

[0013] Preferably, the water flow simulation mechanism includes a water suction pipe and a water outlet pipe symmetrically inserted on both sides of the outer shell. One end of the water suction pipe and one end of the water outlet pipe are both connected with a rectangular water collecting pipe in a through manner. A circulation conveying pipe is connected between the two rectangular water collecting pipes. A circulation water pump and a third flow control valve are provided on the circulation conveying pipe. A spray head is fixedly arranged at one end of the water outlet pipe.

[0014] Preferably, the quick connection mechanism includes an electric push rod fixedly arranged at the end of the outer shell, a corrugated hose and a cylindrical barrel fixedly inserted on the spacer plate. One end of the electric push rod is fixedly connected with a connecting platform. A metal connecting pipe is fixedly arranged on one side of the connecting platform, and one end of the metal connecting pipe is connected with the branch circulation pipeline through a corrugated hose in a through manner. A sealing sleeve and a plugging clamping plate are respectively fixedly arranged on the outer side of the metal connecting pipe and at the end far away from the corrugated hose. A rubber pad and a plug connector are fixedly arranged on one side of the plugging clamping plate. Sealing air bags are fixedly arranged at equal intervals on the outer side of the plug connector.

[0015] Preferably, the oil and gas pipeline includes a pipe body to be measured and plug-in sleeves arranged at both ends of the pipe body to be measured. An annular sealing groove is arranged in the inner cavity of the plug-in sleeve. Hydraulic sensors, flow sensors and fiber Bragg grating sensors are respectively arranged at different positions on the pipe body to be measured according to the requirements of fluid flow simulation detection.

[0016] Preferably, the shape of the tube to be measured is designed proportionally according to the layout path of the pipeline, and the size of the annular sealing groove matches the size of the sealing airbag.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. By arranging a stirring device in the liquid recovery tank, the stirring device can stir the simulated fluid and some organic materials added in the liquid recovery tank, and can quickly adjust the concentration of the simulated fluid, and can simulate the influence of fluids with different concentrations flowing in the oil and gas pipeline on the oil and gas pipeline. By arranging a vacuum pump at the top of the liquid recovery tank, the vacuum pump can evacuate the liquid recovery tank to form a negative pressure inside the liquid recovery tank, which can accelerate the discharge of the gas in the recovered fluid and can quickly separate the gas in the fluid. The fluid after gas separation can be reused. While the transfer pump transports the fluid in the liquid recovery tank to the environmental simulation mechanism through the main circulation pipeline and the branch circulation pipeline for simulating and detecting the oil and gas pipeline, a certain proportion of pulsed gas is injected into the main circulation pipeline and the branch circulation pipeline through the first gas injection mechanism and the second gas injection mechanism, which can simulate the slug flow phenomenon often occurring in the multiphase pipeline. Under the slug flow state, the pressure of the pipeline and the instantaneous gas-liquid flow rate at the outlet of the pipeline will have large fluctuations and be accompanied by strong vibrations, and the oil and gas pipeline can be simulated and detected under this special state.

[0019] 2. By controlling the electric push rod on the quick connection mechanism to extend, when the electric push rod extends, it drives the sealing clamp plate to quickly clamp and dock the oil and gas pipeline to be detected. Moreover, an insertion joint and a sealing airbag are arranged at the end of the quick connection mechanism. After the insertion joint is inserted into the insertion sleeve on the oil and gas pipeline during connection, the sealing airbag is inflated. After inflation, the expanded sealing airbag cooperates with the annular sealing groove, which can not only improve the sealing effect during docking, but also meet the connection requirements of different calibers, with wider adaptability. After quickly clamping and docking the oil and gas pipeline through the quick connection mechanism, sand and soil particles are filled into the environmental simulation mechanism to bury the oil and gas pipeline, and the fluid simulation experiment detection of the buried oil and gas pipeline can be carried out. Similarly, by filling a certain amount of water into the environmental simulation mechanism, the layout environment of the oil and gas pipeline underwater can be simulated, and the fluid simulation experiment detection of the underwater laid oil and gas pipeline can be carried out, realizing the multi-condition simulation function.

[0020] 3. Inject air pressure or hydraulic pressure into the unitary pressurization mechanism according to the actual situation through the injection nozzle. At the same time, open the second solenoid valve and the fourth solenoid valve on the unitary pressurization mechanism. The air pressure or hydraulic pressure injected into the unitary pressurization mechanism will flow directly out from the release port, which can pressurize the simulation detection cavity, squeeze the sand and soil layer in the environmental simulation mechanism or the water filled in the simulated underwater environment, and simulate the pressure environment of the oil and gas pipeline at different laying depths, making the simulation detection more realistic. After the pressure simulation regulation in the simulation detection cavity is completed, close the fourth solenoid valve and selectively open the third solenoid valve at the top of different top pressure components. At this time, the injected air pressure or hydraulic pressure will flow into the top pressure component to squeeze the piston plate. Driven by the air pressure or hydraulic pressure, the piston plate will drive the ejector rod and the pressure head to move downward. Through the pressure head, a certain part of the oil and gas pipeline can be pressurized individually, the change of the oil and gas pipeline under the force at a certain place can be simulated and detected, and the multi-condition simulation function can be realized.

[0021] 4. The environmental simulation mechanism is provided with two groups for comparative simulation experiments, which can simulate the influence of oil and gas pipelines with different shapes on the fluid flow under the same environment, or simulate the influence of oil and gas pipelines with the same shape on the fluid flow under different environments, and can provide test data for the layout shape of subsequent pipelines, facilitating the reasonable layout of pipelines. The hydraulic pressure at different positions of the oil and gas pipeline can be detected by a hydraulic sensor, the flow rate at different positions of the oil and gas pipeline can be detected by a flow sensor, and data such as temperature, displacement, stress, and strain at different positions of the oil and gas pipeline can be detected by a fiber Bragg grating sensor. The process of damage and failure of the oil and gas pipeline can be dynamically monitored on a computer, and the mechanism of damage and failure of the oil and gas pipeline can be analyzed, providing test data for engineering practice. During actual simulation, vibration sensors and noise sensors can also be installed on the oil and gas pipeline according to requirements to detect the vibration and noise generated by the oil and gas pipeline during the fluid flow test. By setting up a water flow simulation mechanism, the water flow environment when the oil and gas pipeline is laid underwater can be simulated, the influence of the water flow on the oil and gas pipeline can be simulated and detected, and the authenticity of the simulation can be further improved. Description of the Drawings

[0022] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of a fluid flow simulation platform for an oil and gas pipeline of the present invention;

[0024] Figure 2 It is an exploded sectional view of the environmental simulation mechanism in the present invention;

[0025] Figure 3 For the present inventionFigure 2 Schematic diagram of the enlarged structure at location A in

[0026] Figure 4 First perspective sectional structure diagram of the environment simulation mechanism in the present invention;

[0027] Figure 5 In the present invention Figure 4 Schematic diagram of the enlarged structure at location B in

[0028] Figure 6 Second perspective sectional structure diagram of the environment simulation mechanism in the present invention;

[0029] Figure 7 Partial sectional structure diagram of the environment simulation mechanism in the present invention;

[0030] Figure 8 In the present invention Figure 7 Schematic diagram of the enlarged structure at location C in

[0031] Figure 9 Schematic diagram of the structure of the oil and gas pipeline in the present invention.

[0032] In the figure: 1, table body;

[0033] 2, liquid recovery tank; 201, tank body; 202, stirring device; 203, exhaust pipe component; 204, vacuum pump;

[0034] 3, main circulation pipeline;

[0035] 4, delivery pump;

[0036] 5, first pressure gauge;

[0037] 6, first gas injection mechanism;

[0038] 7, branch circulation pipeline;

[0039] 8. Environmental simulation mechanism; 801. Outer housing; 802. Sealing cover; 803. Unitary pressurization mechanism; 8031. Shunt pipe; 8032. Aggregation box; 8033. Second solenoid valve; 8034. Injection nozzle; 8035. Top pressure assembly; 80351. Cylinder block; 80352. Thrust rod; 80353. Piston plate; 80354. Pressing head; 80355. Return spring; 8036. Third solenoid valve; 8037. Pressure sensor; 8038. Release port; 8039. Fourth solenoid valve; 804. Water flow simulation mechanism; 8041. Suction pipe; 8042. Outlet pipe; 8043. Rectangular water collecting pipe; 8044. Circulating conveying pipe; 8045. Circulating water pump; 8046. Third flow control valve; 8047. Sprinkler; 805. Spacer; 806. Simulation detection cavity; 807. Quick connection mechanism; 8071. Electric push rod; 8072. Corrugated hose; 8073. Connection platform; 8074. Metal connecting pipe; 8075. Sealing sleeve; 8076. Sealing and clamping plate; 8077. Rubber pad; 8078. Plug connector; 8079. Cylindrical barrel; 80710. Sealing airbag; 808. Oil and gas pipeline; 8081. Pipe to be measured; 8082. Insertion sleeve; 8083. Annular sealing groove; 8084. Hydraulic sensor; 8085. Flow sensor; 8086. Fiber Bragg grating sensor;

[0040] 9. First flow control valve;

[0041] 10. Second gas injection mechanism; 1001. Gas injection pipe fitting; 1002. Check valve; 1003. First solenoid valve; 1004. Quick connector;

[0042] 11. Second pressure gauge;

[0043] 12. Third pressure gauge;

[0044] 13. Second flow control valve. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Embodiment, as Figures 1-9As shown in the figure, an oil and gas pipeline fluid flow simulation platform includes a platform body 1, a liquid recovery tank 2 and a main circulation pipeline 3. A delivery pump 4, a first pressure gauge 5 and a first gas injection mechanism 6 are successively arranged on the main circulation pipeline 3. The delivery pump 4 can transport the fluid in the liquid recovery tank 2 to the environment simulation mechanism 8 through the main circulation pipeline 3 and the branch circulation pipeline 4 for simulating and detecting the oil and gas pipeline 808. While simulating and detecting the oil and gas pipeline 808, the first gas injection mechanism 6 and the second gas injection mechanism 10 are connected to a high-pressure gas tank or other gas charging devices. A certain proportion of pulsed gas is injected into the main circulation pipeline 3 and the branch circulation pipeline 4 through the first gas injection mechanism 6 and the second gas injection mechanism 10, so as to simulate the slug flow phenomenon that often occurs in the multiphase pipeline. Under the slug flow state, the pressure of the pipeline and the instantaneous gas-liquid flow rate at the outlet of the pipeline will have large fluctuations and be accompanied by strong vibrations. The oil and gas pipeline 808 can be simulated and detected under this special state. The pressure in the main circulation pipeline 3 can be detected through the first pressure gauge 5. Two groups of branch circulation pipelines 7 are connected to one side of the main circulation pipeline 3 in a through manner. An environment simulation mechanism 8 is connected to the branch circulation pipeline 7. Two sets of environment simulation mechanisms 8 are provided to conduct comparative simulation experiments, which can simulate the influence of oil and gas pipelines 808 with different shapes on the fluid flow under the same environment, or simulate the influence of oil and gas pipelines 808 with the same shape on the fluid flow under different environments, and can provide test data for the layout shape of subsequent pipelines to facilitate the reasonable layout of pipelines. A first flow control valve 9, a second gas injection mechanism 10, a second pressure gauge 11, a third pressure gauge 12 and a second flow control valve 13 are successively arranged on the branch circulation pipeline 7 on both sides of the environment simulation mechanism 8. Through the cooperation of the first flow control valve 9 and the second flow control valve 13, the fluid flow rate and fluid pressure in the pipeline between the two can be regulated to facilitate simulation experiments under different fluid flow rates and fluid pressures. The pipeline pressures at the inlet and outlet of the environment simulation mechanism 8 can be detected through the second pressure gauge 11 and the third pressure gauge 12 respectively;

[0047] The environmental simulation mechanism 8 includes a housing 801 and a sealing cover 802 fixedly arranged on the top of the table body 1 through a bracket. A unitary pressurization mechanism 803 is provided on the sealing cover 802. A water flow simulation mechanism 804 is provided on the outer side of the housing 801. Two groups of partition plates 805 are symmetrically and fixedly arranged in the inner cavity of the housing 801. A simulation detection cavity 806 is formed between the two groups of partition plates 805. Quick connection mechanisms 807 are symmetrically arranged on both sides of the simulation detection cavity 806. An oil and gas pipeline 808 is clamped and connected between the two groups of quick connection mechanisms 807. After the oil and gas pipeline 808 is quickly clamped and docked through the quick connection mechanism 807, sand and soil particles are filled into the simulation detection cavity 806 to bury the oil and gas pipeline 808, and a fluid simulation experiment detection can be carried out on the buried oil and gas pipeline 808. Similarly, by filling a certain amount of water into the simulation detection cavity 806, the laying environment of the oil and gas pipeline 808 underwater can be simulated, and a fluid simulation experiment detection can be carried out on the oil and gas pipeline 808 laid underwater, and the multi-condition simulation function can be realized.

[0048] As a further embodiment of the above invention: The liquid recovery tank 2 includes a tank body 201 with a sealing cover plate at the top feed port and a stirring device 202 arranged in the inner cavity of the tank body 201. An exhaust pipe member 203 is connected through the top of the tank body 201. A vacuum pump 204 is provided on the exhaust pipe member 203. By arranging the stirring device 202 in the liquid recovery tank 2, the simulation fluid and some added organic materials in the liquid recovery tank 2 can be stirred through the stirring device 202, the concentration of the simulation fluid can be quickly adjusted, and the influence of fluids with different concentrations flowing in the oil and gas pipeline on the oil and gas pipeline can be simulated. By arranging the vacuum pump 204 at the top of the liquid recovery tank 2, the vacuum pump 204 can evacuate the liquid recovery tank 2 to form a negative pressure in the liquid recovery tank 2, the gas in the recovered fluid can be discharged quickly, the gas in the fluid can be quickly separated, and the fluid after gas separation can be reused.

[0049] As a further embodiment of the above invention: Both the first gas injection mechanism 6 and the second gas injection mechanism 10 include a gas injection pipe member 1001. A one-way check valve 1002, a first solenoid valve 1003 and a quick connector 1004 are provided on the gas injection pipe member 1001. The quick connector 1004 is used for quickly connecting a high-pressure gas tank. The first gas injection mechanism 6 and the second gas injection mechanism 10 are connected to a high-pressure gas tank or other gas charging devices. By injecting a certain proportion of pulsed gas into the main circulation pipeline 3 and the branch circulation pipeline 4 through the first gas injection mechanism 6 and the second gas injection mechanism 10, the slug flow phenomenon often occurring in the mixed transportation pipeline can be simulated. By arranging the one-way check valve 1002, liquid backflow can be avoided. By arranging the first solenoid valve 1003, the blowing of high-pressure gas can be controlled intermittently.

[0050] As a further embodiment of the above invention: The sealing cover 802 is fixedly installed on the top of the outer housing 801 by screws, and a sealing gasket is provided between the sealing cover 802 and the outer housing 801, which can improve the sealing performance and avoid gas or liquid leakage.

[0051] As a further embodiment of the above invention: The unitary pressurizing mechanism 803 includes a shunt pipe 8031 and an aggregation box 8032 fixedly arranged at the top of the inner cavity of the sealing cover 802. The shunt pipe 8031 and the aggregation box 8032 are connected through a pipeline in a through manner, and a second electromagnetic valve 8033 is provided on the connected pipeline. A pressure injection nozzle 8034 is provided at the top of the shunt pipe 8031. The bottom end of the aggregation box 8032 is connected through a pipeline in a through manner with a top pressing assembly 8035, and a third electromagnetic valve 8036 is provided on the connected pipeline. A pressure sensor 8037 and a release port 8038 are provided on the aggregation box 8032, and a fourth electromagnetic valve 8039 is provided on the release port 8038. According to the actual situation, air pressure or hydraulic pressure is injected into the unitary pressurizing mechanism 803 through the pressure injection nozzle 8034. At the same time, the second electromagnetic valve 8033 and the fourth electromagnetic valve 8039 on the unitary pressurizing mechanism 803 are opened. The air pressure or hydraulic pressure injected into the unitary pressurizing mechanism 803 will directly flow out from the release port 8038, which can pressurize the simulation detection cavity 806, can extrude the sand and soil layer in the environmental simulation mechanism 8 or the water filled in the simulated underwater environment, and can simulate the pressure environment of the oil and gas pipeline 808 at different laying depths, making the simulation detection more real. After the pressure simulation regulation in the simulation detection cavity 806 is completed, the fourth electromagnetic valve 8039 is closed and the third electromagnetic valve 8036 at the top of different top pressing assemblies 8035 is selectively opened. At this time, the injected air pressure or hydraulic pressure will flow into the top pressing assembly 8035 to squeeze the piston plate 80353. The piston plate 80353 will drive the ejector rod 80352 and the pressing head 80354 to move downward under the push of the air pressure or hydraulic pressure. Through the pressing head 80354, a certain part of the oil and gas pipeline 808 can be individually pressurized, and the change of the oil and gas pipeline 808 under the force at a certain part can be simulated and detected.

[0052] As a further embodiment of the above invention: The pressing assembly 8035 includes a cylinder block 80351 fixedly connected to the bottom of the aggregation box 8032 through a bracket. A push rod 80352 is inserted into the cylinder block 80351. A piston plate 80353 and a pressing head 80354 are respectively fixedly provided at the upper and lower ends of the push rod 80352. A return spring 80355 is sleeved outside the push rod 80352. After the pressure simulation in the simulation detection cavity 806 is completed, the fourth solenoid valve 8039 is closed and the third solenoid valves 8036 at the tops of different pressing assemblies 8035 are selectively opened. At this time, the injected air pressure or hydraulic pressure will flow into the pressing assembly 8035 to squeeze the piston plate 80353. Driven by the air pressure or hydraulic pressure, the piston plate 80353 will drive the push rod 80352 and the pressing head 80354 to move downward. Through the pressing head 80354, a certain part of the oil and gas pipeline 808 can be individually pressed, and the change of the oil and gas pipeline 808 under the force at a certain part can be simulated and detected.

[0053] As a further embodiment of the above invention: The water flow simulation mechanism 804 includes a water suction pipe 8041 and a water outlet pipe 8042 symmetrically inserted on both sides of the outer housing 801. One end of the water suction pipe 8041 and one end of the water outlet pipe 8042 are both connected with a rectangular water collecting pipe 8043. A circulation conveying pipe 8044 is connected between the two groups of rectangular water collecting pipes 8043. A circulation water pump 8045 and a third flow control valve 8046 are provided on the circulation conveying pipe 8044. A spray head 8047 is fixedly provided at one end of the water outlet pipe 8042. When the circulation water pump 8045 on the water flow simulation mechanism 804 is turned on, the circulation water pump 8045 can circulate and convey the water in the simulation detection cavity 806 through the circulation conveying pipe 8044. The conveyed water is sprayed out from the spray head 8047, which can simulate the water flow environment when the oil and gas pipeline 808 is laid underwater, can simulate and detect the influence of the water flow on the oil and gas pipeline 808, and can further improve the authenticity of the simulation.

[0054] As a further embodiment of the above invention: The quick connection mechanism 807 includes an electric push rod 8071 fixedly arranged at the end of the outer housing 801, a corrugated hose 8072, and a cylindrical tube 8079 fixedly inserted through the spacer plate 805. One end of the electric push rod 8071 is fixedly connected to a connection platform 8073. A metal communication pipe 8074 is fixedly arranged on one side of the connection platform 8073. One end of the metal communication pipe 8074 is connected to the branch circulation pipeline 7 through the corrugated hose 8072. A sealing sleeve 8075 and a plugging splint 8076 are respectively fixedly arranged on the outer side of the metal communication pipe 8074 and the end far from the corrugated hose 8072. A rubber pad 8077 and a plug connector 8078 are fixedly arranged on one side of the plugging splint 8076. Sealing air bags 80710 are fixedly arranged at equal intervals on the outer side of the plug connector 8078. By controlling the elongation of the electric push rod 8071 on the quick connection mechanism 807, when the electric push rod 8071 elongates, it drives the plugging splint 8076 to quickly clamp and dock the oil and gas pipeline 808 to be detected. Moreover, a plug connector 8078 and sealing air bags 80710 are arranged at the end of the quick connection mechanism 807. After the plug connector 8078 is inserted into the socket 8082 on the oil and gas pipeline 808 during connection, the sealing air bags 80710 are inflated. The inflated sealing air bags 80710 cooperate with the annular sealing groove 8083, which can not only improve the sealing effect during docking but also meet the connection requirements of different diameters. After the quick connection mechanism 807 quickly clamps and docks the oil and gas pipeline 808, sand and soil particles are filled into the simulation detection cavity 806 to bury the oil and gas pipeline 808, and a fluid simulation experiment detection can be carried out on the buried oil and gas pipeline 808. Similarly, by filling a certain amount of water into the simulation detection cavity 806, the laying environment of the oil and gas pipeline 808 underwater can be simulated, and a fluid simulation experiment detection can be carried out on the oil and gas pipeline 808 laid underwater, realizing the multi-condition simulation function.

[0055] As a further embodiment of the above invention: The oil and gas pipeline 808 includes a pipe body 8081 to be tested and socket sleeves 8082 provided at both ends of the pipe body 8081 to be tested. An annular sealing groove 8083 is provided in the inner cavity of the socket sleeve 8082. Hydraulic sensors 8084, flow sensors 8085 and fiber Bragg grating sensors 8086 are respectively arranged at different positions on the pipe body 8081 to be tested according to the requirements of fluid flow simulation detection. The hydraulic pressure at different positions of the oil and gas pipeline 808 can be detected through the hydraulic sensors 8084, the flow rate at different positions of the oil and gas pipeline 808 can be detected through the flow sensors 8085, and data such as temperature, displacement, stress, and strain at different positions of the oil and gas pipeline 808 can be detected through the fiber Bragg grating sensors 8086. The process of damage and failure of the oil and gas pipeline can be dynamically monitored on a computer, the mechanism of damage and failure of the oil and gas pipeline 808 can be analyzed, test data can be provided for engineering practice, and vibration sensors and noise sensors can also be installed on the oil and gas pipeline 808 according to requirements during actual simulation to detect the vibration and noise generated by the oil and gas pipeline 808 during fluid flow tests.

[0056] As a further embodiment of the above invention: The shape of the pipe body 8081 to be tested is designed proportionally according to the layout path of the pipeline, and the size of the annular sealing groove 8083 matches the size of the sealing airbag 80710.

[0057] During specific implementation: By controlling the electric push rod 8071 on the quick connection mechanism 807 to extend, the oil and gas pipeline 808 to be tested can be quickly clamped and docked. When docking, after the plug connector 8078 is inserted into the socket sleeve 8082 on the oil and gas pipeline 808, the sealing airbag 80710 is inflated. The inflated sealing airbag 80710 expands and cooperates with the annular sealing groove 8083, which can not only improve the sealing effect during docking, but also meet the connection requirements of different diameters. After the oil and gas pipeline 808 is quickly clamped and docked by the quick connection mechanism 807, sand and soil particles are filled into the simulation detection cavity 806 to bury the oil and gas pipeline 808, and fluid simulation experiment detection can be carried out on the buried oil and gas pipeline 808. Similarly, by filling a certain amount of water into the simulation detection cavity 806, the layout environment of the oil and gas pipeline 808 underwater can be simulated, and fluid simulation experiment detection can be carried out on the oil and gas pipeline 808 laid underwater;

[0058] The stirring device 202 stirs the simulated fluid in the liquid recovery tank 2 and some added organic materials, quickly regulating the concentration of the simulated fluid. After the concentration regulation of the simulated fluid is completed, the transfer pump 4 is turned on. The transfer pump 4 can transport the fluid in the liquid recovery tank 2 to the environmental simulation mechanism 8 through the main circulation pipeline 3 and the branch circulation pipeline 4 for a simulation detection test of the oil and gas pipeline 808. While the simulation detection test of the oil and gas pipeline 808 is being carried out, the first gas injection mechanism 6 and the second gas injection mechanism 10 are connected to a high-pressure gas tank or other gas charging devices, and a certain proportion of pulsed gas is injected into the main circulation pipeline 3 and the branch circulation pipeline 4 through the first gas injection mechanism 6 and the second gas injection mechanism 10, which can simulate the slug flow phenomenon often occurring in the multiphase pipeline;

[0059] According to the actual situation, air pressure or hydraulic pressure is injected into the unitary pressurization mechanism 803 through the injection nozzle 8034. At the same time, the second solenoid valve 8033 and the fourth solenoid valve 8039 on the unitary pressurization mechanism 803 are opened. The air pressure or hydraulic pressure injected into the unitary pressurization mechanism 803 will directly flow out from the release port 8038, which can pressurize the simulation detection chamber 806, squeeze the sand and soil layer in the environmental simulation mechanism 8 or the water filled in the simulated underwater environment, and can simulate the pressure environment of the oil and gas pipeline 808 at different laying depths, making the simulation detection more realistic. After the pressure simulation regulation of the simulation detection chamber 806 is completed, the fourth solenoid valve 8039 is closed and the third solenoid valve 8036 at the top of different top pressure components 8035 is selectively opened. At this time, the injected air pressure or hydraulic pressure will flow into the top pressure component 8035 to squeeze the piston plate 80353. Driven by the air pressure or hydraulic pressure, the piston plate 80353 will drive the ejector rod 80352 and the pressure head 80354 to move downward, and a certain part of the oil and gas pipeline 808 can be individually pressurized through the pressure head 80354, and the change of the oil and gas pipeline 808 under the force at a certain part can be simulated and detected;

[0060] Turn on the circulating water pump 8045 on the water flow simulation mechanism 804. The circulating water pump 8045 can circulate the water in the simulation detection chamber 806 through the circulating delivery pipe 8044. The water delivered is sprayed out from the nozzle 8047, which can simulate the water flow environment when the oil and gas pipeline 808 is laid underwater, simulate and detect the impact of the water flow on the oil and gas pipeline 808, and further improve the authenticity of the simulation. The hydraulic pressure at different positions of the oil and gas pipeline 808 can be detected through the hydraulic sensor 8084, the flow rate at different positions of the oil and gas pipeline 808 can be detected through the flow sensor 8085, and data such as temperature, displacement, stress, and strain at different positions of the oil and gas pipeline 808 can be detected through the fiber Bragg grating sensor 8086. The process of damage and failure of the oil and gas pipeline can be dynamically monitored on a computer, the mechanism of damage and failure of the oil and gas pipeline 808 can be analyzed, and test data can be provided for engineering practice. During actual simulation, vibration sensors and noise sensors can also be installed on the oil and gas pipeline 808 according to requirements to detect the vibration and noise generated by the oil and gas pipeline 808 during the fluid flow test.

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An oil and gas pipeline fluid flow simulation platform, comprising a platform body (1), a liquid recovery tank (2) and a main circulation pipeline (3), characterized in that: A delivery pump (4), a first pressure gauge (5) and a first gas injection mechanism (6) are successively arranged on the main circulation pipeline (3). Two groups of branch circulation pipelines (7) are connected through the side of the main circulation pipeline (3). An environment simulation mechanism (8) is connected to the branch circulation pipeline (7). A first flow control valve (9), a second gas injection mechanism (10), a second pressure gauge (11), a third pressure gauge (12) and a second flow control valve (13) are successively arranged on the branch circulation pipeline (7) on both sides of the environment simulation mechanism (8). The environment simulation mechanism (8) includes a housing (801) and a sealing cover (802) fixedly arranged on the top of the table body (1) through a bracket. A unit type pressurizing mechanism (803) is arranged on the sealing cover (802). A water flow simulation mechanism (804) is arranged on the outer side of the housing (801). Two groups of partition plates (805) are symmetrically and fixedly arranged in the inner cavity of the housing (801). A simulation detection cavity (806) is formed between the two groups of partition plates (805). Quick connection mechanisms (807) are symmetrically arranged on both sides of the simulation detection cavity (806). An oil and gas pipeline (808) is clamped and connected between the two groups of quick connection mechanisms (807).

2. The fluid flow simulation platform for oil and gas pipelines according to claim 1, wherein: The liquid recovery tank (2) includes a tank body (201) with a sealing cover plate at the top feed port and a stirring device (202) arranged in the inner cavity of the tank body (201). An exhaust pipe fitting (203) is connected through the top end of the tank body (201). A vacuum pump (204) is arranged on the exhaust pipe fitting (203).

3. The fluid flow simulation platform for oil and gas pipelines according to claim 1, wherein: Both the first gas injection mechanism (6) and the second gas injection mechanism (10) include an injection pipe fitting (1001). A one-way check valve (1002), a first solenoid valve (1003) and a quick connector (1004) are arranged on the injection pipe fitting (1001). The quick connector (1004) is used for quickly connecting a high-pressure gas tank or other gas charging devices.

4. A fluid flow simulation platform for oil and gas pipelines according to claim 1, characterized in that: The sealing cover (802) is fixedly installed on the top of the housing (801) through screws, and a sealing gasket is arranged between the sealing cover (802) and the housing (801).

5. A fluid flow simulation platform for oil and gas pipelines according to claim 4, characterized in that: The unit type pressurizing mechanism (803) includes a shunt pipe (8031) and an aggregation box (8032) fixedly arranged at the top of the inner cavity of the sealing cover (802). The shunt pipe (8031) is connected through a pipeline with the aggregation box (8032), and a second solenoid valve (8033) is arranged on the connected pipeline. An injection pressure nozzle (8034) is arranged at the top of the shunt pipe (8031). The bottom end of the aggregation box (8032) is connected through a pipeline with a top pressure assembly (8035), and a third solenoid valve (8036) is arranged on the connected pipeline. A pressure sensor (8037) and a release port (8038) are arranged on the aggregation box (8032). A fourth solenoid valve (8039) is arranged on the release port (8038).

6. The fluid flow simulation platform for oil and gas pipelines according to claim 5, characterized in that: The top pressing assembly (8035) includes a cylinder block (80351) fixedly connected to the bottom of the aggregation box (8032) through a bracket. A ejector rod (80352) is inserted into the cylinder block (80351). A piston plate (80353) and a pressing head (80354) are fixedly arranged at the upper and lower ends of the ejector rod (80352) respectively. A return spring (80355) is sleeved outside the ejector rod (80352).

7. The fluid flow simulation platform for oil and gas pipelines according to claim 1, characterized in that: The water flow simulation mechanism (804) includes a water suction pipe (8041) and a water outlet pipe (8042) symmetrically inserted on both sides of the outer shell (801). One end of the water suction pipe (8041) and one end of the water outlet pipe (8042) are both connected through a rectangular water collecting pipe (8043). A circulation conveying pipe (8044) is connected between the two rectangular water collecting pipes (8043). A circulation water pump (8045) and a third flow control valve (8046) are arranged on the circulation conveying pipe (8044). A spray head (8047) is fixedly arranged at one end of the water outlet pipe (8042).

8. A fluid flow simulation platform for oil and gas pipelines according to claim 1, characterized in that: The quick connection mechanism (807) includes an electric push rod (8071) fixedly arranged at the end of the outer shell (801), a corrugated hose (8072), and a cylindrical tube (8079) fixedly inserted on the partition plate (805). One end of the electric push rod (8071) is fixedly connected with a connecting platform (8073). A metal connecting pipe (8074) is fixedly arranged on one side of the connecting platform (8073). One end of the metal connecting pipe (8074) is connected through the corrugated hose (8072) to the branch circulation pipeline (7). A sealing sleeve (8075) and a plugging clamping plate (8076) are fixedly arranged on the outer side of the metal connecting pipe (8074) and at the end far from the corrugated hose (8072) respectively. A rubber pad (8077) and a plug connector (8078) are fixedly arranged on one side of the plugging clamping plate (8076). Sealing air bags (80710) are fixedly arranged at equal intervals on the outer side of the plug connector (8078).

9. The fluid flow simulation platform for oil and gas pipelines according to claim 8, characterized in that: The oil and gas pipeline (808) includes a pipe body to be measured (8081) and plug-in sleeves (8082) arranged at both ends of the pipe body to be measured (8081). An annular sealing groove (8083) is arranged in the inner cavity of the plug-in sleeve (8082). Hydraulic sensors (8084), flow sensors (8085), and fiber Bragg grating sensors (8086) are respectively arranged at different positions on the pipe body to be measured (8081) according to the requirements of fluid flow simulation detection.

10. A fluid flow simulation platform for oil and gas pipelines according to claim 9, characterized in that: The shape of the pipe body to be measured (8081) is designed proportionally according to the layout path of the pipeline. The size of the annular sealing groove (8083) matches the size of the sealing air bag (80710).

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