Experimental device and experimental method for flow resistance of liquid lead-bismuth alloy

Abstract

The invention provides a liquid lead bismuth alloy flow resistance experiment device which comprises a liquid storage container and an experiment box which are connected through a pipeline, a first pipeline is arranged between the liquid storage container and the experiment box, a second pipeline is arranged between the experiment box and the liquid storage container, and a first flow meter is arranged on the first pipeline; the experimental box comprises an outer shell, a flow channel is arranged in the outer shell, a supporting inner core capable of being taken out is arranged on the flow channel, a plurality of detachable and replaceable experimental devices are arranged on the supporting inner core, the experimental devices are located in the flow channel, a first pressure meter is arranged at the inlet end of the flow channel, and a second pressure meter is arranged at the outlet end of the flow channel. The invention further provides an experiment method based on the liquid lead bismuth alloy flow resistance experiment device. According to the experimental device and the experimental method provided by the invention, the internal structures of the rod bundle channel and the heat transfer tube channel can be simulated by disassembling and replacing experimental devices in the experimental box, and the measurement and research of the flow resistance characteristics of the liquid lead-bismuth alloy surface with different structures can be completed.

Description

Technical Field

[0001] The present application relates to the technical field of liquid metal experiments in advanced nuclear reactors, and in particular to a liquid lead-bismuth alloy flow resistance experimental device and an experimental method thereof. Background Art

[0002] In nuclear reactors, lead-cooled fast reactors use lead-bismuth alloy as a primary cooling medium. Lead-bismuth alloy has stable chemical properties, high boiling point, high thermal conductivity, and the advantages of good heat transfer performance and high energy density. However, the physical properties of lead-bismuth alloy and water are very different, and the existing mature pressurized water reactor design and operation experience cannot be directly applied to lead-cooled fast reactors. The flow resistance characteristics of lead-bismuth alloy are directly related to the design of the main pump head, and will also affect the flow field distribution and heat transfer process in the primary circuit of the reactor. Therefore, it is necessary to first conduct a detailed study on the flow resistance characteristics of lead-bismuth alloy.

[0003] The existing experimental devices for the flow and heat transfer characteristics of lead-bismuth alloys mainly focus on the construction of system loops, and most of them form experimental system solutions for rod bundle assemblies. In an actual reactor, the lead-bismuth alloy not only flows through the rod bundle assembly in the first loop, but also sweeps across the heat transfer tube and indirectly transfers heat with the working fluid in the second loop. The rod bundle and the heat transfer tube are very different in structure and arrangement. The flow resistance characteristics of lead-bismuth alloys are different in various places in the reactor, and it is necessary to conduct research on the flow resistance characteristics of lead-bismuth media for different structures. However, the existing experimental devices cannot complete the measurement and research of the flow resistance characteristics of lead-bismuth alloys under multiple structural parameters and multiple structures in the same experimental loop.

[0004] Therefore, it is necessary to develop a new type of liquid lead-bismuth alloy flow resistance experimental device. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a liquid lead-bismuth alloy flow resistance experimental device, which can complete the measurement and analysis of the flow resistance characteristics of the liquid lead-bismuth alloy under different structures by replacing experimental devices.

[0006] The technical solution adopted by the present application to solve the technical problem is: construct a liquid lead-bismuth alloy flow resistance experimental device, comprising a liquid storage container and an experimental box connected by a pipeline, the liquid storage container is used to store the liquid lead-bismuth alloy, a delivery pump is arranged on the pipeline, the liquid lead-bismuth alloy circulates between the liquid storage container and the experimental box through the delivery pump, the pipeline between the outlet end of the liquid storage container and the inlet end of the experimental box is a first pipeline, the pipeline between the outlet end of the experimental box and the inlet end of the liquid storage container is a second pipeline, and a first flow meter is arranged on the first pipeline;

[0007] The experimental box includes an outer shell, a through flow channel is arranged inside the outer shell for liquid lead-bismuth alloy to flow through, a removable supporting inner core is arranged on the flow channel, a plurality of detachable and replaceable experimental devices are arranged on the supporting inner core, the experimental devices are located in the flow channel, a first pressure gauge is arranged at the inlet end of the flow channel, and a second pressure gauge is arranged at the outlet end of the flow channel.

[0008] In some embodiments, two experimental boxes are provided, the experimental boxes include a first experimental box and a second experimental box, the experimental boxes include a first branch and a second branch, the first experimental box is provided on the first branch, the second experimental box is provided on the second branch, and the first branch and the second branch are provided in parallel.

[0009] In some embodiments, a second flow meter and a fifth control valve are provided on the first branch, and the second flow meter and the fifth control valve are located between the outlet end of the liquid storage container and the inlet end of the first experimental box;

[0010] The second branch is provided with a third flow meter and a sixth control valve, and the third flow meter and the sixth control valve are located between the outlet end of the liquid storage container and the inlet end of the second experimental box.

[0011] In some embodiments, a heater for heating the liquid lead-bismuth alloy is provided on the first pipeline;

[0012] The second pipeline is provided with a heat exchanger, and the heat exchanger is used to adjust the temperature of the liquid lead-bismuth alloy after the experiment is completed.

[0013] In some embodiments, a third pipeline is arranged in parallel with the heater, a second control valve is arranged on the third pipeline, and a third control valve is arranged between the liquid storage container (100) and the heater (400).

[0014] In some embodiments, a temperature sensor is disposed in the flow channel, and the temperature sensor is connected to a temperature meter.

[0015] In some embodiments, an oxygen control box is disposed on the second pipeline.

[0016] In some embodiments, an air filling and exhaust circuit is provided between the oxygen control box and the liquid storage container, and the air filling and exhaust circuit includes a gas cylinder connected between the oxygen control box and the liquid storage container, a tenth control valve is provided at the gas outlet end of the gas cylinder, an eighth control valve is provided between the gas cylinder and the oxygen control box, and a ninth control valve is provided between the gas cylinder and the liquid storage container.

[0017] In addition, the present application also discloses an experimental method based on the above-mentioned liquid lead-bismuth alloy flow resistance experimental device, comprising the following steps:

[0018] S1. Take out the supporting inner core from the outer shell, replace it with the experimental device to be tested, and after replacement, put the supporting inner core back into the outer shell and fix it;

[0019] S2, turning on the delivery pump to allow the liquid lead-bismuth alloy in the liquid storage container to flow through the experimental box;

[0020] S3, measuring the total flow Q of the liquid lead-bismuth alloy by the first flow meter in The pressure P of the liquid lead-bismuth alloy before entering the experimental box is measured by the first pressure gauge in The pressure P of the liquid lead-bismuth alloy flowing out of the experimental box is measured by the second pressure gauge. out ;

[0021] S4. According to the measurement results of step S3, the pressure drop of the liquid lead-bismuth alloy after flowing through the experimental box is obtained as △P=P in -P out , by △P and Q in Calculate and analyze the flow resistance of liquid lead-bismuth alloy;

[0022] S5. Turn off the delivery pump and end the experiment.

[0023] In some embodiments, in the above step S5, after closing the delivery pump, the eighth control valve and the tenth control valve are opened, and the high-pressure gas delivered from the gas cylinder passes through the second pipeline, the test box and the first pipeline in sequence, and reaches the liquid storage container, and the residual liquid lead-bismuth alloy in the second pipeline, the test box and the first pipeline is cleaned back into the liquid storage container.

[0024] The implementation of this application has at least the following beneficial effects: This application proposes a liquid lead-bismuth alloy flow resistance experimental device and experimental method, which can simulate the internal structure of the rod bundle channel and the heat transfer tube channel by disassembling and replacing the experimental devices inside the experimental box, and complete the measurement and research of the flow resistance characteristics of the liquid lead-bismuth alloy facing different structures; at the same time, this application can also adjust the number of experimental devices by disassembly, and has the function of completing the study of flow resistance characteristics under various structural parameters, thereby reducing experimental and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 It is a structural schematic diagram of a liquid lead-bismuth alloy flow resistance experimental device provided in the present application;

[0027] Figure 2 yes Figure 1Schematic diagram of the three-dimensional structure of the experimental box;

[0028] Figure 3 yes Figure 2 Schematic diagram of the internal structure of the experimental box.

[0029] Description of Figure Numbers:

[0030] A first pipeline 10, a second pipeline 20, a third pipeline 30, a fourth pipeline 40, and a charging and exhaust circuit 50;

[0031] Liquid storage container 100, first flow meter 200, delivery pump 300, heater 400, test box 500, second flow meter 501, second flow meter 502, temperature meter 503, heat exchanger 600, oxygen control box 700, gas cylinder 800;

[0032] A first control valve V1, a second control valve V2, a third control valve V3, a fourth control valve V4, a fifth control valve V5, a sixth control valve V6, a seventh control valve V7, an eighth control valve V8, a ninth control valve V9, and a tenth control valve V10;

[0033] Outer shell 510 , flow channel 511 , supporting inner core 520 , mounting groove 521 , experimental device 530 , flange 540 . DETAILED DESCRIPTION

[0034] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings or the orientations or positional relationships in which the products of the present application are usually placed when used. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In response to the problems in the study of the flow resistance characteristics of liquid lead-bismuth alloy, Chinese invention patent CN202310279703.1 provides a liquid lead-bismuth cross-rod bundle flow heat transfer experimental device. The patent divides the experimental device into a flow area module and a power loading module. By measuring the wall temperature, pressure, flow rate and other parameters of the flow area module, the flow heat transfer characteristics of the liquid lead-bismuth medium cross-rod bundle are obtained. However, the experimental section of the device is connected by welding, and it is impossible to replace and adjust the structural parameters of the experimental section, and it does not have the ability to study the thermal hydraulic characteristics of lead-bismuth alloy near the heat transfer tube. In addition, Chinese invention patent CN202310563128.8 provides a lead-bismuth alloy flow heat transfer experimental device and experimental method in a rectangular narrow channel. The patent designs a narrow rectangular channel experimental device for studying the flow heat transfer characteristics of lead-bismuth alloy in a narrow rectangular channel, but it still cannot complete the measurement and analysis of the flow resistance characteristics of liquid lead-bismuth alloy under different structures. Therefore, the present application specifically provides a liquid lead-bismuth alloy flow resistance experimental device, which can complete the measurement and analysis of the flow resistance characteristics of the liquid lead-bismuth alloy under different structures by replacing the experimental device 530.

[0040] Reference Figures 1 to 3 , some specific embodiments of the liquid lead-bismuth alloy flow resistance experimental device provided in this application.

[0041] like Figure 1 As shown, the present application provides a liquid lead-bismuth alloy flow resistance test device, comprising a liquid storage container 100 and an experimental box 500 connected by a pipeline. The liquid storage container 100 is used to store liquid lead-bismuth alloy, and a first control valve V1 is provided at the outlet end of the liquid storage container 100. A delivery pump 300 is provided on the pipeline, and the liquid lead-bismuth alloy circulates between the liquid storage container 100 and the experimental box 500 through the delivery pump 300. The pipeline between the outlet end of the liquid storage container 100 and the inlet end of the experimental box 500 is the first pipeline 10, and the pipeline between the outlet end of the experimental box 500 and the inlet end of the liquid storage container 100 is the second pipeline 20. A first flowmeter 200 is provided on the first pipeline 10, and the first flowmeter 200 is used to measure the total flow data of the liquid lead-bismuth alloy.

[0042] like Figure 1 As shown, in some embodiments, a heater 400 for heating the liquid lead-bismuth alloy is further provided on the first pipeline 10, and the liquid lead-bismuth alloy is heated by the heater 400 to measure the flow resistance characteristics of the liquid lead-bismuth alloy at different temperatures. Further, in order to make the use of the heater 400 more flexible, a third pipeline 30 can be provided in parallel with the heater 400, a second control valve V2 is provided on the third pipeline 30, a third control valve V3 is provided between the liquid storage container 100 and the heater 400, and a fourth control valve V4 is provided between the heater 400 and the experimental box 500. When heating is not required, the second control valve V2 is opened, and the third control valve V3 and the fourth control valve V4 are closed at the same time, so that the liquid lead-bismuth alloy flows through the third pipeline 30; when heating is required by the heater 400, the second control valve V2 is closed, and the third control valve V3 and the fourth control valve V4 are opened at the same time, so that the liquid lead-bismuth alloy flows through the heater 400, and the heater 400 heats the liquid lead-bismuth alloy.

[0043] like Figure 1As shown, in some embodiments, two experimental boxes 500 are provided, and the experimental boxes 500 include a first experimental box and a second experimental box, the first experimental box is provided on the first branch, the second experimental box is provided on the second branch, and the first branch and the second branch are provided in parallel. Among them, a second flow meter 501 and a fifth control valve V5 are provided on the first branch, and the second flow meter 501 and the fifth control valve V5 are located between the outlet end of the liquid storage container 100 and the inlet end of the first experimental box, and a third flow meter 502 and a sixth control valve V6 are provided on the second branch, and the third flow meter 502 and the sixth control valve V6 are located between the outlet end of the liquid storage container 100 and the inlet end of the second experimental box. By providing two or more experimental boxes 500, different group experiments can be carried out, and multiple experimental boxes 500 can also continue to carry out experiments at the same time, thereby improving experimental efficiency. For example, when the fifth control valve V5 is opened, the first experimental box is connected between the first pipeline 10 and the second pipeline 20, and the liquid lead-bismuth alloy flows through the second flowmeter 501 and the first experimental box in sequence; when the sixth control valve V6 is opened, the second experimental box is connected between the first pipeline 10 and the second pipeline 20, and the liquid lead-bismuth alloy flows through the third flowmeter 502 and the second experimental box in sequence; by adjusting the opening of the fifth control valve V5 and the sixth control valve V6, the flow of the liquid lead-bismuth alloy flowing through the first experimental box and the second experimental box can also be regulated respectively. In addition, a fourth pipeline 40 is connected in parallel outside the experimental box 500, and a seventh control valve V7 is arranged on the fourth pipeline 40. When the seventh control valve V7 is opened, part of the liquid lead-bismuth alloy can be diverted and flowed away through the fourth pipeline 40, so as to better regulate the flow of the liquid lead-bismuth alloy flowing through the experimental box 500.

[0044] Among them, Figure 2 , Figure 3 As shown, the experimental box 500 includes an outer shell 510, and a through flow channel 511 is arranged inside the outer shell 510 for liquid lead-bismuth alloy to flow through. A removable support core 520 is arranged on the flow channel 511, and a plurality of experimental devices 530 are arranged on the support core 520. The experimental devices 530 are arranged on the support core 520 in a detachable and replaceable manner. Figure 3As shown, in some embodiments, the inner wall of the support inner core 520 is provided with a plurality of mounting grooves 521. The size and spacing of the mounting grooves 521 are designed according to the experimental requirements. The mounting grooves 521 are used to fix the experimental device 530. The experimental device 530 is clamped in the mounting grooves 521 to complete the installation, so as to achieve convenient and quick disassembly and assembly, so as to facilitate the adjustment of the number of experimental devices 530. In addition, it is easy to think that in other embodiments, the experimental device 530 can also be connected and fixed to the support inner core 520 by a detachable manner such as a buckle or a bolt connection. The experimental device 530 can be at least one of a rod bundle, a heat transfer tube, a plate-like component or a mesh component. The installed experimental device 530 is located in the flow channel 511, and the internal structure of the rod bundle channel and the heat transfer tube channel, etc., is simulated in the flow channel 511. A first pressure gauge is provided at the inlet end of the flow channel 511 to measure the pressure P of the liquid lead-bismuth alloy before entering the experimental box 500. in A second pressure gauge is provided at the outlet of the flow channel 511 to measure the pressure P of the liquid lead-bismuth alloy when it flows out of the experimental box 500. out .

[0045] Furthermore, in some embodiments, the first flowmeter 200, the second flowmeter and the third flowmeter are venturi flowmeters. The first pressure meter and the second pressure meter are diaphragm differential pressure gauges, and the specific range and accuracy are determined according to the experimental requirements and parameter range.

[0046] Furthermore, in some embodiments, the support inner core 520 can be embedded in the flow channel 511 by any means such as snap connection, bolt connection, cover fixation, etc. In addition, a stepped structure is provided inside the outer shell 510 to fix the position of the support inner core 520 and ensure that the cross section of the flow channel 511 is unobstructed.

[0047] Further, such as Figure 3 As shown, in some embodiments, flanges 540 are respectively provided at both ends of the test box 500, and the test box 500 can be quickly connected between the first pipeline 10 and the second pipeline 20 through the flanges 540, while ensuring sealing.

[0048] like Figure 1 As shown, in some embodiments, a heat exchanger 600 is provided on the second pipeline 20. The heat exchanger 600 is generally provided corresponding to the heater 400. The heat exchanger 600 is used to adjust the temperature of the liquid lead-bismuth alloy after the experiment is completed to ensure that the temperature of the refluxed liquid lead-bismuth alloy is maintained at a temperature close to room temperature.

[0049] like Figure 1As shown, in some embodiments, a temperature sensor is provided in the flow channel 511, and the temperature sensor is connected to a temperature meter 503. The temperature inside the experimental box 500 can be displayed in real time through the temperature meter 503, so as to better record and analyze the flow resistance of the liquid lead-bismuth alloy under different environments. Furthermore, temperature sensors can be provided at the inlet and outlet of the flow channel 511 to detect the temperature T of the liquid lead-bismuth alloy entering the flow channel 511. in and the temperature T of the liquid lead-bismuth alloy flowing out of the flow channel 511 out , achieving more accurate record analysis. In addition, in some embodiments, the temperature sensor preferably uses an armored thermocouple, and the specific range and accuracy are determined according to the experimental requirements and parameter range.

[0050] like Figure 1 As shown, in some embodiments, an oxygen control box 700 is provided on the second pipeline 20 to meet the basic requirements of oxide control in a long-term experimental loop.

[0051] like Figure 1 As shown, in some embodiments, an air filling and exhausting circuit 50 is provided between the oxygen control box 700 and the liquid storage container 100, and the air filling and exhausting circuit 50 includes a gas cylinder 800 connected between the oxygen control box 700 and the liquid storage container 100, a tenth control valve V10 is provided at the gas outlet end of the gas cylinder 800, an eighth control valve V8 is provided between the gas cylinder 800 and the oxygen control box 700, and a ninth control valve V9 is provided between the gas cylinder 800 and the liquid storage container 100. The air filling and exhausting circuit 50 is used to complete the cleaning and pressure regulation of the experimental pipeline.

[0052] In addition, the present application also discloses an experimental method based on the above-mentioned liquid lead-bismuth alloy flow resistance experimental device, comprising the following steps: S1, taking out the supporting inner core 520 from the outer shell 510, replacing it with the experimental device 530 to be tested, and after replacement, putting the supporting inner core 520 back into the outer shell 510 and fixing it; S2, starting the delivery pump 300 to allow the liquid lead-bismuth alloy in the liquid storage container 100 to flow through the experimental box 500; S3, measuring the total flow rate Q of the liquid lead-bismuth alloy through the first flowmeter 200 in The pressure P of the liquid lead-bismuth alloy before entering the experimental box 500 is measured by the first pressure gauge. in The pressure P of the liquid lead-bismuth alloy when it flows out of the experimental box 500 is measured by the second pressure gauge out ; S4, according to the measurement results of step S3, the pressure drop of the liquid lead-bismuth alloy after flowing through the experimental box 500 is obtained △P=P in -P out , by △P and Q in Calculate and analyze the flow resistance of the liquid lead-bismuth alloy; S5, close the delivery pump 300 and end the experiment.

[0053] Furthermore, in the above step S5, after closing the delivery pump 300, the eighth control valve V8 and the tenth control valve V10 are opened, and the high-pressure gas delivered by the gas cylinder 800 passes through the second pipeline 20, the experimental box 500 and the first pipeline 10 in sequence, and reaches the liquid storage container 100, and the residual liquid lead-bismuth alloy in the second pipeline 20, the experimental box 500 and the first pipeline 10 is cleaned back into the liquid storage container 100, thereby completing the cleaning of the experimental pipeline.

[0054] The present application proposes a liquid lead-bismuth alloy flow resistance experimental device and experimental method. By disassembling and replacing the experimental device 530 inside the experimental box 500, the internal structure of the rod bundle channel and the heat transfer tube channel can be simulated, and the flow resistance characteristics of the liquid lead-bismuth alloy facing different structures can be measured and studied, and a lead-bismuth alloy flow resistance model can be obtained, which can be used for lead-bismuth alloy related technology research, thermal hydraulic characteristic model construction and phenomenon analysis in lead-bismuth fast reactors; at the same time, the present application can also adjust the number of experimental devices 530 by disassembling, and has the function of completing the flow resistance characteristic research under various structural parameters, reducing experimental and labor costs.

[0055] The above embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present application, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application. Therefore, all equivalent changes and modifications made to the scope of the claims of the present application should belong to the scope covered by the claims of the present application.

Claims

1. A liquid lead-bismuth alloy flow resistance experimental device, characterized in that: The invention comprises a liquid storage container (100) and an experimental box (500) connected by a pipeline, wherein the liquid storage container (100) is used to store liquid lead-bismuth alloy, a delivery pump (300) is arranged on the pipeline, and the liquid lead-bismuth alloy circulates between the liquid storage container (100) and the experimental box (500) through the delivery pump (300), the pipeline between the outlet end of the liquid storage container (100) and the inlet end of the experimental box (500) is a first pipeline (10), and the pipeline between the outlet end of the experimental box (500) and the inlet end of the liquid storage container (100) is a second pipeline (20), and a first flow meter (200) is arranged on the first pipeline (10); The experimental box (500) comprises an outer shell (510), the outer shell (510) is provided with a through flow channel (511) for liquid lead-bismuth alloy to flow through, the flow channel (511) is provided with a removable support inner core (520), the support inner core (520) is provided with a plurality of detachable and replaceable experimental devices (530), the experimental devices (530) are located in the flow channel (511), the inlet end of the flow channel (511) is provided with a first pressure gauge, and the outlet end of the flow channel (511) is provided with a second pressure gauge.

2. The liquid lead-bismuth alloy flow resistance experimental device according to claim 1, characterized in that: The experimental box (500) is provided with two, and the experimental box (500) includes a first experimental box and a second experimental box. The experimental box (500) includes a first branch and a second branch. The first experimental box is arranged on the first branch, and the second experimental box is arranged on the second branch. The first branch and the second branch are arranged in parallel.

3. The liquid lead-bismuth alloy flow resistance experimental device according to claim 2, characterized in that: The first branch is provided with a second flow meter (501) and a fifth control valve (V5), and the second flow meter (501) and the fifth control valve (V5) are located between the outlet end of the liquid storage container (100) and the inlet end of the first experimental box; The second branch is provided with a third flow meter (502) and a sixth control valve (V6), and the third flow meter (502) and the sixth control valve (V6) are located between the outlet of the liquid storage container (100) and the inlet of the second experimental box.

4. The liquid lead-bismuth alloy flow resistance experimental device according to claim 1, characterized in that: The first pipeline (10) is provided with a heater (400) for heating the liquid lead-bismuth alloy; The second pipeline (20) is provided with a heat exchanger (600), and the heat exchanger (600) is used to adjust the temperature of the liquid lead-bismuth alloy after the experiment is completed.

5. The liquid lead-bismuth alloy flow resistance experimental device according to claim 4, characterized in that: A third pipeline (30) is arranged in parallel on the heater (400), a second control valve (V2) is arranged on the third pipeline (30), and a third control valve (V3) is arranged between the liquid storage container (100) and the heater (400).

6. The liquid lead-bismuth alloy flow resistance test device according to claim 4, characterized in that: A temperature sensor is provided in the flow channel (511), and the temperature sensor is connected to a temperature meter (503).

7. The liquid lead-bismuth alloy flow resistance experimental device according to claim 1, characterized in that: An oxygen control box (700) is provided on the second pipeline (20).

8. The liquid lead-bismuth alloy flow resistance test device according to claim 7, characterized in that: An air filling and exhaust circuit (50) is provided between the oxygen control box (700) and the liquid storage container (100), the air filling and exhaust circuit (50) comprising a gas cylinder (800) connected between the oxygen control box (700) and the liquid storage container (100), a tenth control valve (V10) being provided at the gas outlet end of the gas cylinder (800), an eighth control valve (V8) being provided between the gas cylinder (800) and the oxygen control box (700), and a ninth control valve (V9) being provided between the gas cylinder (800) and the liquid storage container (100).

9. An experimental method based on the liquid lead-bismuth alloy flow resistance experimental device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, taking out the supporting inner core (520) from the outer shell (510), replacing it with the experimental device (530) to be tested, and after replacement, putting the supporting inner core (520) back into the outer shell (510) and fixing it; S2, turning on the delivery pump (300) to allow the liquid lead-bismuth alloy in the liquid storage container (100) to flow through the experimental box (500); S3, measuring the total flow rate Q of the liquid lead-bismuth alloy by a first flow meter (200) in The pressure P of the liquid lead-bismuth alloy before entering the experimental box (500) is measured by a first pressure gauge. in The pressure P of the liquid lead-bismuth alloy when it flows out of the experimental box (500) is measured by a second pressure gauge. out ; S4. According to the measurement result of step S3, the pressure drop ΔP of the liquid lead-bismuth alloy after flowing through the experimental box (500) is obtained. in Calculate and analyze the flow resistance of liquid lead-bismuth alloy; S5. Turn off the delivery pump (300) and end the experiment.

10. The experimental method according to claim 9, characterized in that: In the above step S5, after the delivery pump (300) is turned off, the eighth control valve (V8) and the tenth control valve (V10) are opened, and the high-pressure gas delivered by the gas cylinder (800) passes through the second pipeline (20), the test box (500) and the first pipeline (10) in sequence, and reaches the liquid storage container (100), and the residual liquid lead-bismuth alloy in the second pipeline (20), the test box (500) and the first pipeline (10) is cleaned back into the liquid storage container (100).

Images