Sample carrier and liquid metal corrosion test method

Abstract

The embodiment of the present application provides a sample bearing device and a liquid metal corrosion test method. The sample bearing device comprises two end plates, which define openings respectively; a sleeve connected with the two end plates to cooperatively define a containing cavity with the two end plates for containing samples; and a sample positioning member arranged in the containing cavity for positioning multiple samples in the containing cavity alone or in cooperation with the sleeve; wherein a flow channel extending in the axial direction for the flow of liquid metal is formed between the sample and the sleeve, between the sample and the sample positioning member, or between two adjacent samples, and the liquid metal entering the containing cavity through the opening of one end plate can flow along the flow channel to the opening of the other end plate to flow out of the containing cavity, so that the liquid metal entering the containing cavity can flow along the surface of the sample.

Description

Technical Field

[0001] This invention relates to the field of liquid metal corrosion testing technology, and in particular to a sample support device and a liquid metal corrosion testing method for liquid metal corrosion testing. Background Technology

[0002] Sodium-cooled fast reactors and lead-based fast reactors both use liquid metal as a coolant. To ensure the safe and stable operation of these reactors, it is necessary to study the dynamic compatibility of materials in liquid metal coolants and obtain data on the corrosion rate, mechanical properties, microstructure, and composition of structural materials. Key aspects to consider regarding the dynamic compatibility of materials in liquid metal coolants include coolant temperature, impurity content, and sample surface flow rate. In related technologies, a technical problem exists where the coolant flow rate on the sample surface is unstable during dynamic experiments in liquid metal coolant systems, leading to poor accuracy of experimental results. Summary of the Invention

[0003] This application provides a sample carrier device and a liquid metal corrosion test method to at least solve the above-mentioned technical problems existing in related technologies.

[0004] In a first aspect, embodiments of this application provide a sample carrying device for a liquid metal corrosion test, comprising: two end plates, each defining an opening; a sleeve connected to the two end plates to jointly define a receiving cavity for accommodating a sample; and a sample positioning member disposed within the receiving cavity for positioning multiple samples in the receiving cavity individually or in cooperation with the sleeve; wherein, an axially extending flow channel for liquid metal to flow is formed between the sample and the sleeve, between the sample and the sample positioning member, or between two adjacent samples, and liquid metal entering the receiving cavity through the opening of one end plate can flow along the flow channel to the opening of the other end plate and thus flow out of the receiving cavity.

[0005] Secondly, embodiments of this application provide a liquid metal corrosion test method, including: step S1, loading multiple samples using the sample carrier device of the first aspect of this application; step S2, introducing liquid metal into an opening in one end plate of the sample carrier device, so that the liquid metal entering the receiving cavity flows along the surface of each sample to an opening in the other end plate.

[0006] In this embodiment, an axially extending flow channel for liquid metal is formed between the sample and the sleeve, between the sample and the sample positioning element, or between two adjacent samples. Liquid metal entering the receiving cavity through an opening in one end plate can flow along the flow channel to an opening in the other end plate and then out of the receiving cavity, allowing the liquid metal entering the receiving cavity to flow along the sample surface. In this embodiment, by controlling parameters such as the flow rate or pressure of the liquid metal, the flow velocity on the sample surface can be kept stable, thereby obtaining more accurate experimental data. Attached Figure Description

[0007] Other objects and advantages of the invention will become apparent from the following description of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention.

[0008] Figure 1 This is a schematic front view of a tube segment sample carrying device according to an embodiment of the present invention;

[0009] Figure 2 and Figure 3 They are Figure 1 The schematic cross-sectional view of the sample support device shown along the AA and BB directions;

[0010] Figure 4 yes Figure 1 The schematic diagram of the sample carrier device shown is omitted from the figure, which omits part of the sleeve and part of the tube sample.

[0011] Figure 5 yes Figure 1 An exploded schematic diagram of the sample carrier shown.

[0012] Figure 6 It is to combine the tube segment sample with Figure 5 A schematic diagram showing the assembly of the sample positioning components;

[0013] Figure 7 This is a schematic front view of a plate-shaped sample carrier according to another embodiment of the present invention;

[0014] Figure 8 and Figure 9 They are Figure 7 The schematic cross-sectional view of the sample support device along the CC and DD directions is shown.

[0015] Figure 10 yes Figure 7 An exploded schematic diagram of the sample carrier shown.

[0016] Figure 11 yes Figure 7 The schematic diagram of the sample carrier device shown omits the sleeve and the first positioning component;

[0017] Figure 12 yes Figure 10 A schematic top view of the sample carrier shown, omitting the gripping part;

[0018] Figure 13 yes Figure 10 A schematic enlarged view of the first and second positioning elements shown;

[0019] Figure 14 It is to combine plate-shaped samples with Figure 13 A schematic structural diagram showing the assembly of the first and second positioning components;

[0020] Figure 15 yes Figure 14 A schematic exploded view of the structure shown;

[0021] Figure 16 yes Figure 14 A schematic structural diagram of the first positioning component.

[0022] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding.

[0023] Explanation of reference numerals in the attached figures:

[0024] 11. Gripping part; 111. Slot; 112. Rod part; 12. Upper end plate; 121. Opening; 13. Flow channel; 14. Lower end plate; 141. Opening; 142. Fastener; 15. Column; 16. Sleeve; 160. Circumferential sleeve segment; 1601. Groove; 161. Upper axial sleeve segment; 1611. Splicing part; 162. Lower axial sleeve segment; 1621. Splicing mating part; 171. First positioning member; 1710. First base plate; 1711. First positioning groove; 1712. Recessed part; 1713. End separator; 1714. End insert; 1715. Middle insert; 1716. Snap-fit ​​mating part; 172. Second positioning member; 1721. Second positioning groove; 173. Baffle; 1731. Snap-fit ​​part;

[0025] 21. Tensile sample; 211. Filler; 22. Corrosion sample. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. Obviously, the described embodiments are one embodiment of this invention, and not all embodiments. Based on the described embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0028] In the description of the embodiments of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] Related technologies include sample support devices for static corrosion testing of liquid metals. During static corrosion testing, the sample is placed statically in the liquid metal, with no flow velocity on the sample surface, limiting the applicability of the test results to real-world applications. Furthermore, because such sample support devices are not tested with flowing media, they are generally unsuitable for dynamic corrosion testing of liquid metals.

[0030] In related technologies, the sample support device in dynamic corrosion tests of liquid metal (i.e., there is relative flow between liquid metal and sample) is mostly a rotary corrosion device. It is difficult to stabilize the flow velocity on the sample surface in a rotary corrosion device. Liquid metal usually has obvious turbulence and a large linear velocity difference during the flow process, which leads to a large error in the measurement results.

[0031] This application provides a sample carrier for liquid metal corrosion testing, which is suitable for a loop-type liquid metal circulation system. In the loop-type liquid metal circulation system, the sample carrier is placed in the test section of the system. Liquid metal flows into the sample carrier, flows through the sample, flows out of the sample carrier, and then returns to the sample carrier, repeating the cycle.

[0032] See Figures 1 to 7 The sample carrying device provided in this embodiment of the invention includes: two end plates, a sleeve 16, and a sample positioning member. The two end plates each define an opening for the flow of liquid metal. The sleeve 16 is connected to the two end plates to collectively define a receiving cavity for accommodating the sample. Liquid metal can enter and exit the receiving cavity through the openings on the end plates.

[0033] A sample positioning element is disposed within the receiving cavity and is used to position multiple samples within the cavity, either individually or in conjunction with the sleeve 16. An axially extending flow channel 13 is formed between the sample and the sleeve 16, between the sample and the sample positioning element, or between two adjacent samples, for the flow of liquid metal. Liquid metal entering the receiving cavity through an opening in one end plate can flow along the flow channel 13 to an opening in the other end plate. The sample positioning element is connected to both end plates.

[0034] In this embodiment, an axially extending flow channel 13 for liquid metal flow is formed between the sample and the sleeve 16, between the sample and the sample positioning member, or between two adjacent samples. Liquid metal entering the receiving cavity through an opening in one end plate can flow along the flow channel 13 to an opening in the other end plate and then out of the receiving cavity, allowing the liquid metal entering the receiving cavity to flow along the sample surface. In this embodiment, by controlling relevant parameters such as the flow rate or pressure of the liquid metal, the stability of the flow velocity on the sample surface can be ensured, thereby obtaining more accurate experimental data.

[0035] In some embodiments, the sample carrier further includes a gripping part 11, disposed on an end plate, for gripping by a robotic arm. It is readily understood that the temperature of the liquid metal is high, necessitating the use of a robotic arm for handling. The robotic arm can cooperate with the gripping part 11 to immerse the entire sample carrier into the liquid metal in the test section of a loop-type liquid metal circulation system, and to remove the sample carrier from the liquid metal.

[0036] The gripping part 11 can be connected to the upper end plate (i.e., the upper end plate 12). The upper end of the gripping part 11 has a slot 111 to facilitate robotic arm operation. To avoid interfering with the flow of liquid metal into the opening 121 of the upper end plate 12, the portion connecting the gripping part 11 to the upper end plate 12 has a hollow structure. In the illustrated embodiment, the lower part of the gripping part 11 consists of multiple rods 112, which are connected to the upper end plate 12.

[0037] In some embodiments, the sample to be tested includes at least one tensile sample 21. The tensile sample 21 has indentations 1712 formed on both sides of its middle portion along its length direction, extending inwards along its width direction. That is, the tensile sample 21 is generally dumbbell-shaped. The inventors of this application have discovered that, for the tensile sample 21, on the one hand, when liquid metal flows within the flow channel 13, the liquid metal, under pressure, will form eddy currents at the indentations, affecting the accuracy of the test results; on the other hand, the liquid metal remaining at the indentations will solidify after the test, thus remaining on the sample, sample positioning element, or sleeve 16, affecting both subsequent measurements of the sample and the reusability of the positioning element or sleeve 16. Currently, sample carrying devices in related technologies cannot meet the dynamic corrosion testing requirements of special samples such as the segment tensile sample 21.

[0038] To address the aforementioned issues, in some embodiments, the sample carrying device of this application further includes at least one set of filler elements 211, each set comprising two filler elements 211 for filling two recesses 1712 of a tensile sample 21, thereby facilitating axial flow of liquid metal along the surface of the tensile sample 21. The filler elements 211 are adapted to the shape of the recesses 1712 to ensure uniform axial dimensions of the filled sample. In such embodiments, this promotes uniform cross-section of the entire flow channel 13 along the axial direction, preventing eddies in the liquid metal and metal residue.

[0039] In this embodiment, the samples can be divided into tubular samples and plate-shaped samples. A tubular sample, as the name suggests, is a part of a tube, not a circumferentially closed tube. The central angle corresponding to the tubular sample is less than 360 degrees. For ease of assembly, the central angle corresponding to the tubular sample can be less than 180 degrees, for example, 120 degrees.

[0040] For the tube segment sample, the filler 211 has an arcuate structure that matches the groove 1601 of the tube segment sample. For the plate-shaped sample, the filler 211 has a plate-shaped structure that matches the groove 1601 of the plate-shaped sample.

[0041] In some embodiments, the sample to be tested includes at least one corrosion sample 22. The corrosion sample 22 can be directly formed as a pipe-shaped sample or a plate-shaped sample without the need for a filler 211.

[0042] For tubular and plate-shaped samples, this application provides two sample support devices with different structures.

[0043] Figures 1 to 6 A sample carrier for a segment sample according to an embodiment of this application is schematically illustrated. See also Figures 1 to 6 In the sample carrying device for tube segment samples, the sample positioning component can be a column 15 connected to two end plates, and multiple tube segment samples are arranged in close contact with the column 15 along the circumference and axial direction. It is easy to understand that close contact arrangement means that there are only gaps between the two due to machining and installation accuracy, and no gaps are artificially created between them.

[0044] The radial outer surface of the column 15 and the radial inner surface of the sleeve 16 are respectively adapted to the radial inner and outer surfaces of the tube sample, so as to position multiple tube samples radially using the column 15 and the sleeve 16. The surface portion of the column 15 or the sleeve 16 facing each tube sample is recessed inward to form an axially penetrating groove 1601, and each groove 1601 together with the surface of the tube sample defines a flow channel 13 for the flow of liquid metal.

[0045] In this embodiment, multiple tubular sample pieces are positioned radially using the column 15 and sleeve 16, and the groove 1601 formed on the column 15 or sleeve 16 serves as a flow channel 13 for the flow of liquid metal. Since multiple tubular sample pieces are positioned radially using the column 15 and sleeve 16, for a tensile sample 21 with a tubular shape, the fillers 211 on both sides of the tensile sample 21 can also be positioned radially using the column 15 and sleeve 16, resulting in uniform axial dimensions of the filled tensile sample 21. Therefore, the sample carrying device of this embodiment can solve the dynamic testing requirements of tensile samples 21 with a tubular shape by providing the filler 211.

[0046] Each end plate is defined with multiple openings, which are arranged circumferentially at intervals. Correspondingly, there are multiple grooves 1601, each groove 1601 facing a corresponding opening on two end plates. In this embodiment, a set of openings on the two end plates are connected at both ends of the groove 1601. The shape of the groove 1601 can be adapted to the shape of the opening.

[0047] like Figure 4 and Figure 6 As shown, multiple sample groups are mounted axially on the column 15. Each sample group includes multiple samples arranged circumferentially. This arrangement enables the sample carrying device of this embodiment to test multiple samples simultaneously, and these samples may have different lengths.

[0048] exist Figure 2 The schematic cross-sectional view shown depicts a tensile sample 21 of a tube segment. Figure 2 It can be seen that each segment tensile sample 21 has a filler 211 on both sides. Figure 3 The schematic cross-sectional view shown shows a pipe segment corrosion sample 22, which does not require a filler 211.

[0049] Specifically, see Figure 6The column 15, arranged axially from bottom to top, contains 22 groups of corrosion samples, 22 groups of corrosion samples, 21 groups of tensile samples, 21 groups of tensile samples, 22 groups of corrosion samples, 22 groups of corrosion samples, and 21 groups of tensile samples. Each sample group includes three samples distributed circumferentially. Therefore, the device of this embodiment can support samples with various functions. One of the current difficulties in sample-bearing devices used for dynamic corrosion testing in related technologies is the difficulty in ensuring consistent flow velocity across the surfaces of each sample during the test. This embodiment addresses this by making each groove 1601 uniform in axial dimension, and ensuring that the shape and size of each groove 1601 and each opening are identical. This ensures that the cross-section of the entire flow path of the liquid metal entering the sample-bearing device is essentially the same, and that the cross-sections of all flow paths are essentially the same. This facilitates uniform flow of the liquid metal across all flow paths, and consequently helps ensure that samples at different positions axially and circumferentially have the same flow velocity.

[0050] In some embodiments, the column 15 and / or sleeve 16 include multiple segments of different diameters along the axial direction for positioning tube sample samples with different inner or outer diameters. Figure 5 In the illustrated embodiment, the column 15 comprises two segments with different diameters along the axial direction, and the sleeve 16 has the same inner diameter along the axial direction. The tube sample with the smaller inner diameter can be attached to the smaller diameter column segment above the column 15, while the tube sample with the larger inner diameter can be attached to the larger diameter column segment below the column 15.

[0051] For ease of assembly, the sleeve 16 can be formed by combining multiple circumferential sleeve segments 160 along the circumferential direction, with each circumferential sleeve segment 160 having its axial ends connected to two end plates respectively. Specifically, fasteners 142, such as screws, can be used to connect the axial ends of the circumferential sleeve segments 160 to the two end plates respectively.

[0052] The number of circumferential sleeve segments 160 can be the same as the number of samples arranged circumferentially on the column 15. One of the multiple samples distributed circumferentially can face one circumferential sleeve segment 160, so that each circumferential sleeve segment 160 can be provided with a through-axial groove 1601. In the illustrated embodiment, the sleeve 16 consists of 3 circumferential sleeve segments 160, and correspondingly, 3 samples are arranged circumferentially along the column 15.

[0053] In some embodiments, the radially inner surface of each circumferential sleeve segment 160 is recessed radially outward to form an axially penetrating receiving groove for accommodating a set of tube sample segments arranged axially. It is readily understood that the receiving groove is adapted to the shape of the sample. A portion of the bottom wall of the receiving groove is recessed radially outward to form the aforementioned groove 1601, which is used for the flow of liquid metal. In such an embodiment, after assembling the sleeve 16, sample, column 15, and two end plates, there are essentially no other channels for the flow of liquid metal in the entire receiving cavity except for the groove 1601 and the assembly gap. This further ensures the stability and uniformity of the liquid metal flow, making post-experiment fluid calculations simpler.

[0054] In the illustrated embodiment, the bottom wall of the receiving groove in the middle of the groove is recessed radially outward to form the groove 1601.

[0055] In some embodiments, to facilitate the assembly of the sample with the sample carrier, each circumferential sleeve segment 160 includes multiple axial sleeve segments that are detachably connected to each other, and adjacent axial sleeve segments are spliced ​​together. For two axially adjacent axial sleeve segments, one has a splicing portion 1611 and the other has a splicing mating portion 1621. The two axial sleeve segments are spliced ​​into a whole through the cooperation of the splicing portion 1611 and the splicing mating portion 1621. The splicing portion 1611 can be a groove 1601, and correspondingly, the splicing mating portion 1621 can be a protrusion adapted to the groove 1601. Alternatively, the splicing portion 1611 can be a protrusion, and correspondingly, the splicing mating portion 1621 can be a groove 1601 adapted to the protrusion.

[0056] In the illustrated embodiment, each circumferential sleeve segment 160 includes an upper axial sleeve segment 161 and a lower axial sleeve segment 162 spliced ​​with the upper axial sleeve segment 161. During assembly, assembly can be performed from bottom to top. Specifically, 1. Place the lower end plate 14 on a flat surface, connect and install the column 15 to the end plate; 2. Vertically attach two lower corrosion samples 22 to the column 15, with the position of the lower corrosion samples 22 corresponding to one opening of the lower end plate 14; 3. Vertically attach two lower tensile samples 21 to the column 15 above the two lower corrosion samples 22, respectively, along with four fillers 211; 4. Install a lower axial sleeve against the outer surfaces of the two lower corrosion samples 22 and the two lower tensile samples 21, and then use screws to fix the lower axial sleeve to the lower end plate 14; 5. Following steps 2-4 above, sequentially complete the installation of the other four lower corrosion samples 22, four lower tensile samples 21, eight fillers 211, and two lower axial sleeves along the circumference. 6. Assemble segment 162; 7. Vertically attach two upper corrosion samples 22 above two lower tensile samples 21 to the column 15; 8. Combine the upper tensile samples 21 and two fillers 211 vertically above two upper corrosion samples 22 to the column 15; 9. Install an upper axial sleeve against the outer surface of two upper corrosion samples 22 and one upper tensile sample 21, and lock it into position with the lower axial sleeve; 10. Following steps 6-8 above, assemble the other four upper corrosion samples 22, two upper tensile samples 21, four fillers 211 and two upper axial sleeve segments 161 in sequence along the circumference; 11. Fix the upper end plate 12 with the three upper axial sleeves and the column 15 with screws to complete the assembly of the sample and the sample support device.

[0057] The column 15 can be assembled with the upper end plate 12 and the lower end plate 14 using countersunk screws. The gripping part 11 is fixed to the upper end plate 12 by welding. The upper axial sleeve can be assembled with the upper end plate 12 using countersunk screws, and the lower axial sleeve can be assembled with the lower end plate 14 using countersunk screws.

[0058] Figures 7 to 16 A sample carrier for a plate-shaped sample according to an embodiment of this application is illustrated schematically. See also Figures 7 to 16 In a sample carrying device for plate-shaped samples, the sample positioning components may include a first positioning component 171 and a second positioning component 172 disposed opposite to each other. The first positioning component 171 has a plurality of first positioning grooves 1711 arranged at intervals extending vertically, and the second positioning component 172 has a plurality of second positioning grooves 1721 arranged at intervals extending vertically. Both ends of each plate-shaped sample are respectively inserted into the first positioning grooves 1711 of the first positioning component 171 and the second positioning grooves 1721 of the second positioning component 172, and the interval between two adjacent plate-shaped samples forms a flow channel 13.

[0059] In such an embodiment, after assembling multiple samples using the first positioning member 171 and the second positioning member 172, a vertically extending flow channel 13 for the flow of liquid metal can be formed between two adjacent samples.

[0060] exist Figure 8 In the schematic cross-sectional view shown, the sample is a plate-shaped tensile sample 21, from... Figure 8 It can be seen that each plate-shaped tensile sample 21 has a filler 211 on both sides. Figure 9 In the schematic cross-sectional view shown, the sample is a plate-shaped corrosion sample 22, which does not require a filler 211.

[0061] For the plate-shaped tensile sample 21, the fillers 211 on both sides of the tensile sample 21 can also be inserted into the first positioning groove 1711 and the second positioning groove 1721 together with the tensile sample 21 for positioning, so that the overall vertical dimension of the filled tensile sample 21 is uniform. It can be seen that the sample carrying device of this embodiment can solve the dynamic testing requirements of the plate-shaped tensile sample 21 by setting the filler 211.

[0062] The first positioning member 171 may include a first substrate 1710 extending vertically, on which a plurality of first positioning grooves 1711 are formed, spaced horizontally and extending vertically. The second positioning member 172 may include a second substrate extending vertically, on which a plurality of second positioning grooves 1721 are formed, spaced horizontally and extending vertically.

[0063] See Figure 14 The first positioning member 171 may include a plurality of end separators 1713, each end separator 1713 extending vertically from the upper or lower end surface of the first substrate 1710 to engage with a first positioning groove 1711. When both ends of each plate-shaped sample are respectively inserted into the first positioning groove 1711 of the first positioning member 171 and the second positioning groove 1721 of the second positioning member 172, the end separator 1713 abuts against the second substrate of the second positioning member 172.

[0064] By setting the end separators 1713, when assembling the plate-shaped sample with the first positioning member 171 and the second positioning member 172, the gap between the two adjacent end separators 1713 can be used to form a separation channel. The separation channel is connected to the flow channel 13 between the two adjacent samples, which is conducive to the uniformity of the cross section of the entire flow channel 13 in the vertical direction after the liquid metal enters the sample carrying device, and avoids the occurrence of eddies and metal residues in the liquid metal.

[0065] This embodiment of the application, by arranging each first positioning groove 1711 and each second positioning groove 1721 at equal intervals, with the first positioning grooves 1711 and second positioning grooves 1721 having uniform vertical dimensions and the intervals before adjacent end separators 1713 being equal, enables the cross-section of the entire flow path of the liquid metal entering the sample carrier device to be substantially the same, and all flow paths to have substantially the same cross-section. This facilitates uniform flow of the liquid metal throughout the entire flow path, and further helps to ensure that the liquid metal on the sample surface at different vertical positions has the same flow velocity. See also Figure 14 The first positioning member 171 may further include: a plurality of inserts, each insert extending from the first positioning groove 1711 toward the second positioning member 172, the inserts being used to insert into the second positioning groove 1721 of the second positioning member 172 to connect the first positioning member 171 and the second positioning member 172.

[0066] The insert may include end inserts 1714 formed at both ends of the first positioning groove 1711. The end inserts 1714 are connected to the end separators 1713, which helps to ensure that the cross-section of the entire flow channel 13 in the vertical direction is uniform after the liquid metal enters the sample carrier device, and avoids the occurrence of eddies and metal residues in the liquid metal.

[0067] In some embodiments, the insert may include a central insert 1715 formed in the middle of the first positioning groove 1711. The central insert 1715 extends horizontally from the first positioning groove 1711 toward the second positioning member 172.

[0068] In addition to connecting the first positioning member 171 and the second positioning member 172, the insert can also support the sample and ensure that the cross-section of the entire flow channel 13 is uniform in the vertical direction.

[0069] The second positioning groove 1721 does not penetrate the second substrate. Each first positioning groove 1711 can penetrate the first substrate 1710. The sample positioning member also includes a baffle 173, which is disposed on the side surface of the first substrate 1710 away from the end separator 1713, to prevent the plate-shaped sample inserted into the first positioning groove 1711 from penetrating the first substrate 1710.

[0070] A recessed portion 1712 is formed on the surface of the first substrate 1710 away from the end separator 1713. A plurality of first positioning grooves 1711 are formed in the recessed portion 1712, and a baffle 173 is embedded in the recessed portion 1712. The baffle 173 and the first substrate 1710 can also be engaged. Accordingly, the baffle 173 is provided with a engaging portion 1731, and the first substrate 1710 is provided with a engaging mating portion 1716. The baffle 173 and the first substrate 1710 are engaged through the engagement of the engaging portion 1731 and the engaging mating portion 1716. The engaging portion 1731 can be, for example, a protrusion, and correspondingly, the engaging portion 1716 can be, for example, a groove 111.

[0071] When the insert includes a central insert 1715, the back of the central insert 1715 may be flush with the surface of the first substrate 1710. In such an embodiment, recesses 1712 may be formed on the upper and lower sides of the central insert 1715, and correspondingly, the number of baffles 173 is consistent with the number of recesses 1712.

[0072] The opening can be located in the middle of the end plate and face the end partition 1713 so that liquid metal entering the receiving cavity through the opening can flow into both sides of each end partition 1713.

[0073] The sample carrier device of this application embodiment can be used in a loop-type forced circulation liquid metal system, a thermal convection circulation liquid metal system, etc. The sample carrier device can be arranged in the hot-end or cold-end experimental area of ​​the loop system. The materials of each component in the sample carrier device can be materials resistant to liquid metal corrosion.

[0074] For tube-shaped samples, when the flow channel is on the outer surface, a groove 1601 can be provided on the inner surface of the sleeve 16; when the flow channel is on the inner surface, a groove 1601 can be provided on the outer surface of the column 15. For plate-shaped samples, the spacing between adjacent plate samples can be adjusted by setting the interval between two adjacent first positioning grooves 1711 and the interval between two adjacent second positioning grooves 1721.

[0075] The sample carrying device can also hold pipe segment corrosion samples 22 and pipe segment tensile samples 21 of different diameters by setting the outer diameter of the column 15 and / or the inner diameter of the sleeve 16, or hold plate-shaped corrosion samples 22 and plate-shaped tensile samples 21 of different thicknesses or widths by setting the dimensions of the first positioning groove 1711 and the second positioning groove 1721. In some embodiments, the first positioning member 171 and the second positioning member 172 can be combined with the column 15, so that pipe segment samples and plate-shaped samples can be placed simultaneously.

[0076] The sample carrying device of this application embodiment has wide applicability and can be used in various devices such as loop-type forced circulation liquid metal systems and thermal convection circulation liquid metal systems using various liquid metals such as sodium, sodium-potassium alloy, lithium, lead, lead-bismuth alloy, and lead-lithium alloy as coolants. It has the advantages of accurate parameters, high reliability, strong compatibility, complete functions, and wide applicability. It facilitates the dynamic corrosion experiments of various types of structural material parts in liquid metal and effectively solves the difficult problems such as unstable flow velocity on the sample surface, inconsistent flow velocity, and difficulty in fixing irregularly shaped pipe samples.

[0077] The coolant flow rate, temperature, and temperature difference between the hot and cold sections of the sample surface are positively correlated with the size, power, and complexity of the circuit system. Higher sample surface flow rates, higher maximum temperatures, and greater temperature differences between the hot and cold sections all result in higher power requirements for the heater, heat exchanger, and cooler in the circuit system. The corrosion sample 22 and the mechanical property sample have significantly different appearances and structures, making it challenging to conduct experiments within the same sample support device. Effectively controlling the coolant flow rate and temperature on all sample surfaces to meet design requirements, while minimizing coolant flow to reduce the power parameters of equipment such as heaters, and simultaneously accommodating both corrosion and mechanical property samples within the sample support device requires a comprehensive design of the sample support device's structure, taking into account the number, size, and arrangement of samples. The sample support device of this embodiment can support a large number of samples, significantly reduce coolant flow, and facilitates control of the coolant flow rate and temperature on all sample surfaces.

[0078] The sample carrier device of this application embodiment can be used in cyclic experimental devices using liquid metals such as sodium, sodium-potassium alloy, lithium, lead, lead-bismuth alloy, and lead-lithium alloy as coolants. After using the sample carrier device, the surface flow rate of the experimental sample can be accurately controlled, simulating the actual operating environment of the structural material, which is consistent with the engineering design requirements. It provides real and reliable corrosion data, mechanical property data and other key data. Combined with the comprehensive analysis of the sample, it lays a good foundation for the engineering application of structural materials and provides data support for the aging research, service life extension and decommissioning of structural materials.

[0079] This application also provides a liquid metal corrosion test method, including steps S1 and S2.

[0080] Step S1: Load multiple samples using the sample carrier device of any embodiment of this application.

[0081] Step S2: Introduce liquid metal into an opening in one end plate of the sample carrier device so that the liquid metal entering the receiving cavity flows along the surface of the sample to an opening in the other end plate.

[0082] In some embodiments, the sample is a tube sheet sample, each end plate is defined to form a plurality of openings, and the sleeve 16 is formed by circumferentially assembling a plurality of circumferential sleeve segments 160. Step S1 includes: steps S10 to S18.

[0083] Step S10: Assemble the column 15 of the sample carrier device with the lower end plate 14.

[0084] Step S12: Assemble multiple tube segment samples along the axial direction with the column 15, wherein each sample corresponds to the position of an opening 141 on the lower end plate 14.

[0085] Step S14: Assemble a circumferential sleeve segment 160 of the sample carrying device with the lower end plate 14, wherein the circumferential sleeve segment 160 sleeve fits against multiple tube sample segments.

[0086] Step S16: Repeat steps S12 and S14 until all tube sample samples are assembled with column 15.

[0087] Step S18: Assemble the upper end plate 12 of the sample carrier device with the column 15 and each circumferential sleeve segment 160, wherein each tube sample corresponds to the position of an opening 121 on the upper end plate 12.

[0088] Step S2 may include placing the assembled sample carrier device in the experimental section of the loop system and conducting the experiment.

[0089] In some embodiments, the sample is a plate-shaped sample, and step S1 includes steps S11 to S17.

[0090] Step S11: Assemble the first positioning component 171 and the second positioning component 172.

[0091] Step S13: Place multiple plate-shaped samples into the first positioning groove 1711 of the first positioning member 171 and the second positioning groove 1721 of the second positioning member 172, and assemble the baffle 173 with the first positioning member 171.

[0092] Step S15: Place the structure assembled in step S13 into sleeve 16.

[0093] Step S17: Assemble the upper end plate 12 and the lower end plate 14 with the sleeve 16.

[0094] In step S13, each tensile sample 21 filler 211 and each upper tensile sample 21 are combined and placed into the corresponding positions of the first positioning groove 1711 and the second positioning groove 1721; each corrosion sample 22 is placed into the corresponding positions of the first positioning groove 1711 and the second positioning groove 1721; and the panel is installed.

[0095] In step S15, the installed first positioning component 171, second positioning component 172, and sample are loaded into sleeve 16.

[0096] In step S17, the upper end plate 12 and the lower end plate 14 are installed together with the sleeve 16 using flat-head screws.

[0097] Regarding the embodiments of the present invention, it should also be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0098] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sample support device for liquid metal corrosion testing, comprising: Two end plates, each defining an opening; A sleeve, connected to the two end plates, together with the two end plates, defines a receiving cavity for accommodating the sample; as well as A sample positioning element is disposed within the receiving cavity and is used to cooperate with the sleeve to position multiple samples within the receiving cavity; Wherein, an axially extending flow channel for the flow of liquid metal is formed between the sample and the sleeve or between the sample and the sample positioning member. Liquid metal entering the receiving cavity through an opening in one of the end plates can flow along the flow channel to an opening in the other end plate and thus flow out of the receiving cavity. The sample is a segment sample. The sample positioning component is a column connected to the two end plates, and multiple tube sample pieces are arranged in close contact with the column along the circumference and axial direction of the column. Wherein, the radial outer surface of the column and the radial inner surface of the sleeve are respectively adapted to the radial inner and outer surfaces of the tube sample; The column or the sleeve faces the surface portion of each of the tube sample, which is recessed inward to form an axially penetrating groove. Each groove, together with the surface of the tube sample, defines a flow channel for the flow of liquid metal.

2. The apparatus according to claim 1, further comprising: The gripping part is disposed on one of the end plates and is used for gripping by the robotic arm.

3. The apparatus according to claim 1, wherein, The sample includes at least one tensile sample, wherein the tensile sample is recessed inward along the width direction on both sides of the middle part along the length direction to form a recessed portion. The device further includes at least one set of filler groups, each set of filler groups including two fillers for filling two recesses of each of the tensile samples respectively, so as to facilitate the axial flow of liquid metal along the surface of the tensile sample.

4. The apparatus according to claim 1, wherein, Each of the end plates is defined to form a plurality of openings, which are arranged at intervals along the circumference. There are a plurality of grooves, and each groove faces the corresponding openings of the two end plates.

5. The apparatus according to claim 1, wherein, The column or the sleeve includes multiple segments of different diameters along the axial direction for positioning tube sample of different thicknesses.

6. The apparatus according to claim 1, wherein, The sleeve is formed by combining multiple circumferential sleeve segments along the circumferential direction, and the two ends of each circumferential sleeve segment are respectively connected to the two end plates.

7. The apparatus according to claim 6, wherein, Each of the circumferential sleeve segments includes multiple axial sleeve segments that are detachably connected to each other, and adjacent axial sleeve segments are spliced ​​together.

8. The apparatus according to claim 6, wherein, The radially inner surface of each circumferential sleeve segment is recessed radially outward to form an axially penetrating receiving groove, which is used to accommodate a set of tube sample arranged axially, and a portion of the bottom wall of the receiving groove is recessed radially outward to form the groove.

9. A method for testing the corrosion of liquid metal, comprising: Step S1: Load multiple samples using the sample carrying device according to any one of claims 1 to 8; Step S2: Introduce liquid metal into an opening in one end plate of the sample carrier device, so that the liquid metal entering the receiving cavity flows along the surface of each sample to an opening in the other end plate.

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