A particle group flow blockage experimental system in transparent and non-transparent liquids

Abstract

The present invention discloses a particle group flow blockage test system in transparent and non-transparent liquids, belonging to the field of thermal hydraulic safety technology for lead-based fast reactors. The system comprises a transparent test mechanism, comprising a transparent test tube disposed within a transparent water tank, a first test section disposed within the transparent water tank, and a first circulation mechanism connected thereto; and a non-transparent test mechanism, comprising a non-transparent test tube disposed within a non-transparent experimental container, a solenoid valve disposed at the top of the non-transparent test tube, a second test section disposed within the non-transparent experimental container, and a second circulation mechanism connected thereto. The transparent and non-transparent test tubes can respectively conduct particle group flow blockage motion experiments in transparent and non-transparent liquids, exploring the particle group flow blockage mechanism in molten lead and bismuth from the shallow to the deep level, starting from the transparent liquid and progressing to the non-transparent liquid.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal hydraulic safety of lead-based fast reactors, and in particular relates to a particle group flow blockage experimental system in transparent liquid and non-transparent liquid. Background Art

[0002] Liquid metal-cooled fast reactors (LMFRs) are fast neutron reactors that use liquid metal as a coolant. A flow blockage is a potential accident type in LMRs. In LMRs, liquid metal serves as the coolant, and the system operates in a liquid phase. A flow blockage can occur when solid particles form in the liquid phase, causing particle aggregation in narrow channels, or when fuel pellets bend or expand, reducing the flow area and reducing the liquid metal flow rate. A flow blockage reduces core flow, preventing heat from being discharged from the core in a timely manner. The resulting rise in core temperature can cause temperature spikes in the cladding material, ultimately leading to cladding failure and fuel element meltdown, posing a significant threat to reactor safety. Furthermore, real-time monitoring of flow blockages is not yet mature, and may not be detected until fuel element damage occurs, leading to radioactive material leakage. Therefore, further research is needed to investigate the flow blockages caused by particle swarms in flow blockages. However, due to the opacity and high temperature of liquid lead-based alloys, the harsh flow field monitoring environment and the limitations of liquid metal flow field measurement technology, there is still a lack of experiments on particle group flow blockage in liquid metal fast reactors.

[0003] An experimental system for measuring the flow blockage characteristics of particle groups in transparent and non-transparent liquids, which can replace different fluids, control liquid temperature changes, and control particle group flow blockage conditions, is of great significance to the research and development of my country's liquid metal fast reactor. Summary of the Invention

[0004] The purpose of the present invention is to provide a particle group flow blockage experimental system in transparent liquid and non-transparent liquid to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a flow blockage experimental system for particle groups in transparent liquids and non-transparent liquids, comprising

[0006] A transparent experimental testing mechanism, comprising a transparent testing tube disposed in a transparent water tank, wherein a first testing portion is disposed in the transparent water tank, and the transparent water tank is connected to a first circulation mechanism;

[0007] A non-transparent experimental testing mechanism, comprising a non-transparent test tube disposed in a non-transparent experimental container, a solenoid valve disposed on the top of the non-transparent test tube, a second testing portion disposed within the non-transparent experimental container, and a second circulation mechanism connected to the non-transparent experimental container;

[0008] A particle group releasing mechanism is connected to the top of the transparent test tube and the top of the electromagnetic valve respectively.

[0009] Preferably, the first testing part includes a first temperature sensor and a first liquid level sensor arranged on the side wall of the transparent water tank, the first liquid level sensor is located at the top of the transparent water tank, and a first auxiliary heating element is provided in the transparent water tank, and the first auxiliary heating element is located between the first liquid level sensor and the first temperature sensor; a high-speed camera is provided outside the transparent water tank, and the high-speed camera is electrically connected to a control terminal through an auxiliary system.

[0010] Preferably, the first circulation mechanism includes a first storage tank, the bottom of the first storage tank is connected to the bottom of the transparent water tank through a first valve, the bottom of the first storage tank is connected to the top of the transparent water tank through a centrifugal pump, a second valve is provided between the first storage tank and the centrifugal pump, and the centrifugal pump is electrically connected to the control terminal through the auxiliary system.

[0011] Preferably, a first heating element is provided outside the first storage tank, a third temperature sensor is provided on the top of the first storage tank, the centrifugal pump is connected to a first circulation pipe, a first auxiliary heating element is provided outside the first circulation pipe, the first circulation pipe is provided with a first discharge installation port, and the first discharge installation port is provided with a first discharge valve.

[0012] Preferably, the second testing part includes a second temperature sensor and a second liquid level sensor arranged on the non-transparent experimental container, the second liquid level sensor is located at the top of the non-transparent experimental container, a second auxiliary heating element is provided inside the non-transparent experimental container, and an external ultrasonic Doppler probe is provided outside the non-transparent experimental container.

[0013] Preferably, the second circulation mechanism includes a second storage tank, the bottom of the second storage tank is connected to the bottom of the non-transparent experimental container through a third valve, the bottom of the second storage tank is connected to a second circulation pipe on the side away from the third valve, the second circulation pipe is connected to the top of the non-transparent experimental container, the outer wall of the second circulation pipe is provided with a fourth auxiliary heating element, the side of the second circulation pipe close to the second storage tank is provided with a fourth valve, the side of the second circulation pipe close to the non-transparent experimental container is provided with an electromagnetic pump, the outer side of the second storage tank is provided with a second heating element, and the top of the second storage tank is provided with a fourth temperature sensor.

[0014] Preferably, the particle group releasing mechanism includes a funnel, a particle group is arranged in the funnel, a conical plug is arranged in the funnel, the conical plug is located at the outlet of the funnel, and the top of the conical plug is connected to a driving motor via a rope.

[0015] Preferably, it further comprises a lifting mechanism, wherein the lifting mechanism comprises an electric lifting platform, and the electric lifting platform is respectively fixed to the transparent water tank and the non-transparent experimental container.

[0016] The present invention discloses the following technical effects: a transparent test tube and a non-transparent test tube can be used to respectively conduct experiments on the flow blockage movement of particle groups in transparent liquids and non-transparent liquids, and the flow blockage mechanism of particle groups in molten lead and bismuth can be explored from the shallow to the deep from transparent liquid to the non-transparent liquid; at the same time, a first test section is provided, which can realize the visualization of the entire flow blockage movement process of the particle group in the transparent flowing liquid, and can directly detect and grasp the flow blockage characteristics of the particle group in the transparent flowing liquid; by providing a second test section, the flow blockage result of the particle group in the non-transparent liquid can be detected, and the flow blockage characteristics of the particle group in the non-transparent flowing liquid can be detected and grasped. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the auxiliary system functional modules of the present invention;

[0020] Figure 3 This is a schematic diagram of the transparent experimental state structure of Example 2 of the present invention;

[0021] Figure 4 This is a schematic diagram of the non-transparent experimental state structure of Example 2 of the present invention;

[0022] Figure 5 This is a complete snapshot of a typical blocking event during the transparency experiment in Example 1 of the present invention;

[0023] Figure 6 This is the effect of different particle group capacities on the clogging probability during the transparency experiment of the present invention.

[0024] In the figure: 1. Transparent experimental test mechanism; 10. Transparent water tank; 11. Transparent test tube; 12. Transparent test tube holder; 13. High-speed camera; 14. Fill light; 15. First temperature sensor; 16. First liquid level sensor; 17. First auxiliary heating element; 2. Non-transparent experimental test mechanism; 20. Non-transparent experimental container; 21. Non-transparent test tube; 22. Non-transparent test tube holder; 23. Second temperature sensor; 24. Second liquid level sensor; 25. Second auxiliary heating element; 26. External ultrasonic Doppler probe; 27. Solenoid valve; 3. Particle group release mechanism; 30. Particle group; 31. Funnel; 3 2. Conical plug; 33. Rope; 34. Drive motor; 4. First circulation mechanism; 40. First valve; 41. First storage tank; 42. First heating element; 43. Third auxiliary heating element; 44. First circulation pipeline; 45. Third temperature sensor; 46. Second valve; 47. Third discharge valve; 48. Centrifugal pump; 5. Second circulation mechanism; 50. Third valve; 51. Second storage tank; 52. Second heating element; 53. Third auxiliary heating element; 54. Second circulation pipeline; 55. Fourth temperature sensor; 56. Fourth valve; 57. Electromagnetic pump; 6. Electric lifting platform; 7. Auxiliary system; 8. Control terminal. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] Reference Figure 1-Figure 2 As shown, this embodiment provides a flow blockage experimental system of a particle group 30 in a transparent liquid and a non-transparent liquid, including

[0029] A transparent experimental testing mechanism 1 includes a transparent testing tube 11 disposed in a transparent water tank 10, a first testing portion being disposed in the transparent water tank 10, and the transparent water tank 10 being connected to a first circulation mechanism 4;

[0030] The non-transparent experimental testing mechanism 2 includes a non-transparent test tube 21 disposed in a non-transparent experimental container 20. A solenoid valve 27 is provided at the top of the non-transparent test tube 21. A second testing portion is provided in the non-transparent experimental container 20. The non-transparent experimental container 20 is connected to a second circulation mechanism 5.

[0031] The particle group releasing mechanism 3 is communicated with the top of the transparent test tube 11 and the top of the electromagnetic valve 27 respectively.

[0032] The transparent test tube 11 and the non-transparent test tube 21 can respectively carry out flow blockage movement experiments of particle groups 30 in transparent liquids and non-transparent liquids, and explore the flow blockage mechanism of particle groups 30 in molten lead and bismuth from shallow to deep from transparent liquids to non-transparent liquids; at the same time, a first test section is set to realize the visualization of the entire flow blockage movement process of the particle group 30 in the transparent flowing liquid, and the flow blockage characteristics of the particle group 30 in the transparent flowing liquid can be directly detected and mastered; by setting the second test section, the flow blockage results of the particle group 30 in the non-transparent liquid can be detected, and the flow blockage characteristics of the particle group 30 in the non-transparent flowing liquid can be detected and mastered.

[0033] To further optimize the solution, the first testing part includes a first temperature sensor 15 and a first liquid level sensor 16 arranged on the side wall of the transparent water tank 10, the first liquid level sensor 16 is located at the top of the transparent water tank 10, and a first auxiliary heating element 17 is provided in the transparent water tank 10, and the first auxiliary heating element 17 is located between the first liquid level sensor 16 and the first temperature sensor 15; a high-speed camera 13 is provided outside the transparent water tank 2, and the high-speed camera 13 is electrically connected to the control terminal 8 through the auxiliary system 7.

[0034] The transparent water tank 10 is a rectangular container made of transparent acrylic material, and the transparent water tank 10 is installed above the electric lifting platform 6; the transparent test tube bracket 12 is made of stainless steel and is installed in the center of the transparent water tank 10; the transparent test tube 11 is a variable diameter long tube made of transparent photosensitive resin, and the transparent test tube 11 is vertically installed in the transparent test tube bracket 12; the top of the transparent test tube 11 is connected to the particle group release mechanism 3; the transparent experimental testing mechanism 1 has a high-speed camera 13, a fill light 14 and a diffuser plate aimed at the transparent test tube 11; the high-speed camera 13 is used to capture the movement trajectory and blockage results of the particle group 30, and the high-speed camera 13 is electrically connected to the control terminal 8; the fill light 14 is used to provide sufficient light, and the diffuser plate is used to provide a clean background The transparent water tank 10 is provided with a first temperature sensor 15 and a first liquid level sensor 16, which are used to collect temperature data and liquid level data of the liquid in the water tank before the experiment. The first temperature sensor 15 and the first liquid level sensor 16 are electrically connected to the control terminal 8 through the auxiliary system 7, and the temperature data and liquid level data are transmitted to the control terminal 8; the transparent water tank 10 is also provided with a first auxiliary heating element 17, which includes a first heating coil and a first thermostat, and the first heating coil and the first thermostat are electrically connected; the first heating coil is used to heat the water in the transparent water tank 10 to maintain the target temperature of the working medium, and the first thermostat is used to adjust the temperature of the first heating coil.

[0035] Among them, the vertical installation method of the transparent test tube 11 simulates the installation method in a lead-based fast reactor, the movement of the particle group 30 in the vertical transparent test tube 11 simulates the movement method of the particle group 30 in a lead-based fast reactor blockage accident, and the high-speed camera 13 is used to capture the movement trajectory of the particle group 30 in the transparent test tube; therefore, a water particle group 30 blockage experiment can be carried out in the transparent test tube 11 and the mechanism of the particle group 30 blockage characteristics can be summarized.

[0036] In a further optimized solution, the first circulation mechanism 4 includes a first storage tank 41. The bottom of the first storage tank 41 is connected to the bottom of the transparent water tank 10 via a first valve 40. The bottom of the first storage tank 41 is connected to the top of the transparent water tank 10 via a centrifugal pump 48. A second valve 46 is provided between the first storage tank 41 and the centrifugal pump 48. The centrifugal pump 48 is electrically connected to a control terminal 8 via an auxiliary system. The second valve 46 is used to control the opening and closing of the pipeline. The centrifugal pump 48 is connected to the top of the transparent water tank 10 through a pipeline. The centrifugal pump 48 can adjust the flow state and liquid level of the water. The centrifugal pump 48 is electrically connected to the control terminal 8 via an auxiliary system 7. The first storage tank 41 and the centrifugal pump 48 are connected to the transparent water tank 10 through pipelines to form an experimental loop. The pipeline connections in the loop are all detachable. The centrifugal pump 48 controls the liquid level in the transparent water tank 10 via the control terminal 8, facilitating the study of the clogging characteristics of the particle swarm 30 under different water level scenarios.

[0037] A further optimized solution is that a first heating element 42 is provided outside the first storage tank 41, a third temperature sensor 45 is provided on the top of the first storage tank 41, the centrifugal pump 48 is connected to a first circulation pipe 44, a first auxiliary heating element 17 is provided outside the first circulation pipe 44, the first circulation pipe 44 is provided with a first discharge installation port, and the first discharge installation port is provided with a first discharge valve.

[0038] The third temperature sensor 45 is used to collect temperature data in the first storage tank 41 . The third temperature sensor 45 is electrically connected to the control terminal 8 and transmits the temperature data to the control terminal 8 .

[0039] The first heating element 42 includes a third heating coil and a third thermostat, and the third heating coil and the third thermostat are electrically connected; the third heating coil is used to heat the water in the storage tank, and the third thermostat is used to adjust the temperature of the third heating coil; the auxiliary heating device includes a fourth heating coil and a fourth thermostat, and the fourth heating coil and the fourth thermostat are electrically connected; the fourth heating coil is used to heat the water in the circulation pipe, and the fourth thermostat is used to adjust the temperature of the fourth heating coil; the third thermostat and the fourth thermostat are both electrically connected to the control terminal 8 through the auxiliary system 7, and can be used to control the water in the experiment to be heated to a specified temperature and maintain a stable state.

[0040] It should be noted that the temperature of the water in the experimental loop can be adjusted by the first thermostat, the second thermostat and the third thermostat, forming scenes of different water temperatures in the transparent water tank 10, which is convenient for studying the clogging characteristics of the particle group 30 under different water temperature scenes.

[0041] To further optimize the solution, the second test section includes a second temperature sensor 23 and a second liquid level sensor 24 arranged on the non-transparent experimental container 20. The second liquid level sensor 24 is located at the top of the non-transparent experimental container 20. A second auxiliary heating element 25 is provided inside the non-transparent experimental container 20, and an external ultrasonic Doppler probe 26 is provided outside the non-transparent experimental container 20.

[0042] The non-transparent experimental container 20 is a rectangular closed container made of stainless steel; the solenoid valve 27 is installed at the top center of the non-transparent experimental container 20; the non-transparent experimental container 20 is installed above the electric lifting platform 6; the non-transparent test tube holder 22 is made of stainless steel and is installed at the center of the non-transparent experimental container 20; the non-transparent test tube 21 is a long stainless steel tube with a variable diameter and is vertically installed in the non-transparent test tube holder 22; the external ultrasonic Doppler probe 26 is used to capture the blockage results of the particle group 30, and the external ultrasonic Doppler probe 26 is electrically connected to the control terminal 8 ; The second temperature sensor 23 and the second liquid level sensor 24 are used to collect the temperature data and liquid level data of the liquid in the non-transparent experimental container before the experiment. The second temperature sensor 23 and the second liquid level sensor 24 are electrically connected to the control terminal 8 through the auxiliary system 7, and transmit the temperature data and liquid level data to the control terminal 8; the second auxiliary heating element 25 includes a second heating coil and a second temperature controller, and the second heating coil and the second temperature controller are electrically connected; the second heating coil is used to heat the liquid in the non-transparent experimental container 20 to maintain the liquid state of the working medium, and the second temperature controller is used to adjust the temperature of the second heating coil.

[0043] The vertical installation method of the non-transparent test tube 21 simulates the installation method in a lead-based fast reactor. The movement of the particle group 30 in the vertical non-transparent test tube 21 simulates the movement method of the particle group 30 in a flow blockage accident in a lead-based fast reactor. The external ultrasonic Doppler probe 26 is used to detect the flow blockage results of the particle group 30; therefore, a lead-bismuth particle group 30 blockage experiment can be carried out in the non-transparent test tube 21 and the mechanism of the particle group 30 blockage characteristics can be summarized.

[0044] In a further optimized solution, the second circulation mechanism 5 includes a second storage tank 51. The bottom of the second storage tank 51 is connected to the bottom of the opaque experimental container 20 via a third valve 50. A second circulation pipe 54 is connected to the side of the bottom of the second storage tank 51 away from the third valve 50. The second circulation pipe 54 is connected to the top of the opaque experimental container 20. A fourth auxiliary heating element is provided on the outer wall of the second circulation pipe 54. A fourth valve 56 is provided on the side of the second circulation pipe 54 near the second storage tank 51. An electromagnetic pump 57 is provided on the side of the second circulation pipe 54 near the opaque experimental container 20. A second heating element 52 is provided on the outer side of the second storage tank 51, and a fourth temperature sensor 55 is provided on the top of the second storage tank 51. A fourth valve 56 is also connected to the second storage tank 51 through a pipe, and the fourth valve 56 is used to control the opening and closing of the pipe. The electromagnetic pump 57 is connected to the interior of the opaque experimental container 20 through a pipe. The electromagnetic pump 57 can adjust the flow state and liquid level of the lead-bismuth. The electromagnetic pump 57 is electrically connected to the control terminal 8 through the auxiliary system 7.

[0045] The second storage tank 51 and the electromagnetic pump 57 are connected to the non-transparent experimental container 20 through pipelines to form an experimental loop, and the pipeline connections in the loop are all detachable connections; the electromagnetic pump 57 controls the liquid level of the non-transparent liquid in the non-transparent experimental container 20 through the control terminal 8, which can facilitate the study of the blockage characteristics of the particle group 30 under different liquid level scenarios.

[0046] The second heating element 52 includes a fifth heating coil and a fifth thermostat, which are electrically connected to each other; the fifth heating coil is used to heat the lead and bismuth in the storage tank to maintain the liquid state of the working fluid, and the fifth thermostat is used to adjust the temperature of the fifth heating coil; the auxiliary heating device includes a sixth heating coil and a sixth thermostat, which are electrically connected to each other; the sixth heating coil is used to heat the lead and bismuth in the circulation pipeline to maintain the liquid state of the working fluid, and the sixth thermostat is used to adjust the temperature of the sixth heating coil; the fifth thermostat and the sixth thermostat are both electrically connected to the control terminal 8 through the auxiliary system 7, and can be used to control the lead and bismuth in the experiment to be heated to a specified temperature and maintain a stable state.

[0047] It should be pointed out that the temperature of lead and bismuth in the experimental circuit can be adjusted by the fourth thermostat, the fifth thermostat and the sixth thermostat, forming scenes of different lead and bismuth temperatures in the non-transparent experimental container 20, which is convenient for studying the blocking characteristics of the particle group 30 under different lead and bismuth temperature scenes.

[0048] In a further optimized solution, the particle group release mechanism 3 includes a funnel 31, in which a particle group 30 is placed. A conical plug 32 is provided in the funnel 31. The conical plug 32 is located at the outlet of the funnel 31. The top of the conical plug 32 is connected to a drive motor 34 via a rope 33. The drive motor 34 is electrically connected to the control terminal 8 via the auxiliary system 7.

[0049] The particle group 30 is a particle with different physical properties selected based on the flow blockage of a real lead-based reactor particle group to cover the particle properties under all hypothetical situations. The driving motor 34 drives the conical plug 32 upward at a constant rate to release the particle group 30 into the transparent test tube.

[0050] It should be noted that the particle group 30 can be replaced with particles of different sizes, quantities, and types according to the experimental conditions required for research.

[0051] A further optimized solution further includes a lifting mechanism, which includes an electric lifting platform 6, which is fixedly connected to the transparent water tank 10 and the non-transparent experimental container 20 respectively.

[0052] Since the transparent experimental test mechanism 1 and the non-transparent experimental test mechanism 2 are connected in parallel, the present invention can simultaneously conduct flow blockage movement experiments of particle groups 30 in transparent liquids and non-transparent liquids, and simultaneously study the flow blockage movement mechanism of particle groups 30 in transparent liquids and non-transparent liquids; since the high-speed camera 13 is aimed at the transparent test tube 11, the flow blockage movement of the entire particle group 30 in the transparent liquid can be visualized, and the flow blockage characteristics of the particle group 30 in the transparent flowing liquid can be directly detected and mastered; since the external ultrasonic Doppler probe is aimed at the non-transparent test tube 21, the flow blockage results of the entire particle group 30 in the non-transparent liquid can be detected; since the centrifugal pump 48 and the electromagnetic pump 57 can conveniently adjust the liquid temperature and liquid level parameters, the parameters of the particle group 30 can be conveniently adjusted, thereby covering most of the parameters under the particle group flow blockage accident in the lead-based fast reactor, so as to fully master the movement law of the particle group 30 under the condition of the particle group flow blockage accident.

[0053] Example 2

[0054] by Figure 3 or Figure 4 For example, the particle group release mechanism includes a particle group 30, a funnel 31, a conical plug 32 and a drive motor 34; the conical plug 32 is connected to the drive motor 34 through a rope 33; the outlet of the funnel 31 is detachably connected to the transparent test tube 11 or the solenoid valve 27.

[0055] by Figure 3 For example, when the transparent liquid experiment is started, the transparent experimental test mechanism 1 is detachably connected to the first circulation mechanism 4 and the particle group 30 release mechanism; the specific detachable connection of the transparent experimental test mechanism 1 pipeline connected to the particle group release mechanism 3 is a mobile connection, and the transparent test tube 11 of the transparent experimental test mechanism 1 has a threaded hole on its wall, which is threadedly connected to the outlet of the funnel 31; the specific detachable connection of the transparent experimental test mechanism 1 pipeline connected to the first circulation mechanism 4 is a pipeline connector connection, and the connector is put on the two pipe ends to be connected, and the side bolts are tightened to make the teeth bite the surface of the pipe end to achieve a limit fixation, and the sealing sleeve is tightly attached to the pipe to achieve a locked state of a firmly sealed connection.

[0056] by Figure 4For example, after completing the transparent liquid experiment, when starting the non-transparent experiment, the non-transparent experiment test mechanism 2 is detachably connected to the particle group release mechanism 3 and the second circulation mechanism 5. The specific detachable connection between the pipeline of the non-transparent experiment test mechanism 2 and the particle group release mechanism 3 is a movable connection. The top of the solenoid valve 27 of the non-transparent experiment test mechanism 2 is provided with a thread, which is connected to the outlet of the funnel 31. The specific detachable connection between the pipeline of the non-transparent experiment test mechanism 2 and the second circulation mechanism 5 is a pipeline connector connection. The connector is put on the two ends of the pipes to be connected, and the side bolts are tightened, so that the teeth bite the surface of the pipe ends to achieve a limit fixation, and the sealing sleeve is tightly attached to the pipe to achieve a locked state of a sealed and firmly connected state.

[0057] The following describes the specific method and steps for the flow blocking characteristic experiment of the particle group 30 in transparent liquid and non-transparent liquid respectively:

[0058] The following is a specific method for the flow blocking characteristics experiment of a transparent liquid particle group 30 using room temperature water as an example:

[0059] S1, experimental preparation stage, after installing the experimental equipment and adjusting various valves, then putting an appropriate amount of water into the first storage tank 41, using the control terminal 8 to activate the first heating coil to heat the room temperature water to a specified temperature, and using the control terminal 8 to activate the electric lifting platform 6 to raise the transparent water tank 10 to a specified height;

[0060] S2, preheating the circuit, starting the centrifugal pump 48 in the circuit, setting the liquid level of the water to a specified height, and running it for a period of time to keep the temperature stable. At the same time, adjusting the first auxiliary heating element 43 in the circuit to keep the water temperature in the entire circuit constant;

[0061] S3, adjust the high-speed camera 13, place the particle group 30 with the required experimental parameters in the funnel 31, wait for the particle group 30 to stabilize in the funnel 31, and start the data acquisition and detection system to record data;

[0062] S4, the control terminal 8 starts the drive motor 34 to drive the conical plug 32 to move upward at a constant speed, releasing the particle group 30 into the transparent test tube 11;

[0063] S5, during the movement of the particle group 30, the movement trajectory of the particle group 30 and the location where the particle group 30 is blocked can be observed by the high-speed camera 13;

[0064] S6, the acquisition circuit module transmits the collected experimental data to the data acquisition module, and the data acquisition module transmits it to the control terminal 8 for technical personnel to study;

[0065] S7, after releasing and measuring 100 groups of particle groups 30 in each experiment, different parameters of particle groups 30, different heights of the electric lifting platform 6 and other parameters are changed, and the above measurements are repeated;

[0066] S8. After all experiments are completed, the experimental data are sorted out, and the influence of various parameters on the flow blocking characteristics of the particle group 30 is summarized.

[0067] The following is a specific method for the flow blocking characteristics experiment of a particle group 30 in a non-transparent liquid, using lead and bismuth as examples:

[0068] S1, experimental preparation stage, the experimental equipment is installed and various valves are adjusted. Then, an appropriate amount of lead and bismuth is placed in the second storage tank 51. The first heating coil is activated by the control terminal 8 to heat the lead and bismuth to a specified temperature. The electric lifting platform 6 is activated by the control terminal 8 to raise the non-transparent experimental container 20 to a specified height.

[0069] S2, preheating the circuit, starting the electromagnetic pump 57 in the circuit, setting the lead-bismuth liquid level to a specified height, and running it for a period of time to keep the temperature stable. At the same time, adjusting the second auxiliary heating element 25 in the circuit to keep the lead-bismuth temperature in the entire circuit constant;

[0070] S3, calibrating the external ultrasonic Doppler probe 26, placing a particle group 30 with the required experimental parameters in the funnel 31, and after the particle group 30 is stable in the funnel 31, starting the data acquisition and detection system to record data;

[0071] S4, fully opening the solenoid valve 27 by the control terminal 8, starting the drive motor 34 to drive the tapered plug 32 to move upward at a constant speed, releasing a certain number of particle groups 30 into the non-transparent test tube 21;

[0072] S5, during the movement of the particle group 30, the external ultrasonic Doppler probe 26 can be used to detect whether the particle group 30 is blocked and the location of the blockage;

[0073] S6, after the particle group 30 finishes moving, the solenoid valve 27 is completely closed through the control terminal 8;

[0074] S7, the acquisition line module transmits the collected experimental data to the data acquisition module, and the data acquisition module transmits it to the control terminal 8 for technical personnel to study;

[0075] S8, after releasing and measuring 100 groups of particle groups 30 in each experiment, different parameters of particle groups 30, different heights of the electric lifting platform 6 and other parameters are changed, and the above measurements are repeated;

[0076] S9, after all experiments are completed, the experimental data are sorted out, and the influence of various parameters on the flow blocking characteristics of the particle group 30 is summarized.

[0077] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0078] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A particle group flow blockage experimental system in transparent and non-transparent liquids, characterized by: include A transparent experimental testing mechanism (1), comprising a transparent testing tube (11) disposed in a transparent water tank (10), a first testing portion being disposed in the transparent water tank (10), and a first circulation mechanism (4) being connected to the transparent water tank (10); A non-transparent experimental testing mechanism (2), the non-transparent experimental testing mechanism (2) comprising a non-transparent testing tube (21) disposed in a non-transparent experimental container (20), a solenoid valve (27) being provided at the top of the non-transparent testing tube (21), a second testing portion being provided in the non-transparent experimental container (20), and the non-transparent experimental container (20) being connected to a second circulation mechanism (5); a particle group releasing mechanism (3), the particle group releasing mechanism (3) being in communication with the top of the transparent test tube (11) and the top of the electromagnetic valve (27), respectively; The first testing part comprises a first temperature sensor (15) and a first liquid level sensor (16) arranged on the side wall of the transparent water tank (10); a high-speed camera (13) is provided outside the transparent water tank (10); The second test section comprises a second temperature sensor (23) and a second liquid level sensor (24) arranged on the non-transparent experimental container (20); an external ultrasonic Doppler probe (26) is provided outside the non-transparent experimental container (20); The particle group releasing mechanism (3) comprises a funnel (31), a particle group (30) is arranged in the funnel (31), a conical plug (32) is arranged in the funnel (31), the conical plug (32) is located at the outlet of the funnel (31), and the top of the conical plug (32) is connected to a driving motor (34) via a rope (33).

2. The particle group flow blockage experimental system in transparent liquid and non-transparent liquid according to claim 1, characterized in that: The first liquid level sensor (16) is located at the top of the transparent water tank (10), a first auxiliary heating element (17) is provided in the transparent water tank (10), and the first auxiliary heating element (17) is located between the first liquid level sensor (16) and the first temperature sensor (15); the high-speed camera (13) is electrically connected to a control terminal (8) via an auxiliary system (7).

3. The particle group flow blockage experimental system in transparent liquid and non-transparent liquid according to claim 2, characterized in that: The first circulation mechanism (4) includes a first storage tank (41), the bottom of the first storage tank (41) is connected to the bottom of the transparent water tank (10) through a first valve (40), the bottom of the first storage tank (41) is connected to the top of the transparent water tank (10) through a centrifugal pump (48), a second valve (46) is provided between the first storage tank (41) and the centrifugal pump (48), and the centrifugal pump (48) is electrically connected to the control terminal (8) through the auxiliary system (7).

4. The particle flow blockage experimental system in transparent and non-transparent liquids according to claim 3, characterized in that: A first heating element (42) is provided outside the first storage tank (41), a third temperature sensor (45) is provided on the top of the first storage tank (41), the centrifugal pump (48) is connected to a first circulation pipe (44), a first auxiliary heating element (17) is provided outside the first circulation pipe (44), the first circulation pipe (44) is provided with a first discharge installation port, and the first discharge installation port is provided with a first discharge valve.

5. The particle group flow blockage experimental system in transparent liquid and non-transparent liquid according to claim 1, characterized in that: The second liquid level sensor (24) is located on the top of the non-transparent experimental container (20), and a second auxiliary heating element (25) is provided in the non-transparent experimental container (20).

6. The particle group flow blockage experimental system in transparent liquid and non-transparent liquid according to claim 5, characterized in that: The second circulation mechanism (5) includes a second storage tank (51), the bottom of the second storage tank (51) is connected to the bottom of the non-transparent experimental container (20) through a third valve (50), the bottom of the second storage tank (51) is connected to a second circulation pipe (54) on the side away from the third valve (50), the second circulation pipe (54) is connected to the top of the non-transparent experimental container (20), the outer wall of the second circulation pipe (54) is provided with a fourth auxiliary heating element, the side of the second circulation pipe (54) close to the second storage tank (51) is provided with a fourth valve (56), the side of the second circulation pipe (54) close to the non-transparent experimental container (20) is provided with an electromagnetic pump (57), the outer side of the second storage tank (51) is provided with a second heating element (52), and the top of the second storage tank (51) is provided with a fourth temperature sensor (55).

7. The particle group flow blockage experimental system in transparent liquid and non-transparent liquid according to claim 1, characterized in that: It also includes a lifting mechanism, which includes an electric lifting platform (6), and the electric lifting platform (6) is fixedly connected to the transparent water tank (10) and the non-transparent experimental container (20) respectively.

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