Diffusion coefficient measuring device

Abstract

The invention discloses a diffusion coefficient measurement device, relates to the technical field of measurement devices, and solves the problems of poor measurement precision and long time consumption. The diffusion coefficient measuring device comprises a diffusion assembly, a sample introduction assembly and a sampling assembly, the diffusion assembly is provided with an accommodating space, a first channel and a second channel, the accommodating space is used for placing a to-be-measured sample, and the first channel and the second channel are respectively communicated with the accommodating space; the sample introduction assembly is used for providing a first solution to the first channel and providing a second solution to the second channel, and the concentration of the first solution is greater than that of the second solution; the sampling assembly is arranged in the first channel and is used for acquiring a first solution flowing through the to-be-tested sample;

Description

Technical Field

[0001] This application relates to, but is not limited to, the technical field of measuring devices, and particularly relates to a diffusion coefficient measuring device. Background Art

[0002] The diffusion coefficient measuring device is used to measure the diffusion coefficient of nuclides in rock and soil. In related technologies, the measuring device includes a source term pool and a receiving pool. The solutions in the source term pool and the receiving pool are prone to form convection, which affects the measurement accuracy, and the measurement takes several months to complete. Summary of the Invention

[0003] The diffusion coefficient measuring device provided by the embodiments of this application can effectively improve the measurement efficiency, save the measurement time, and improve the accuracy of the measurement results.

[0004] The embodiments of this application provide a diffusion coefficient measuring device, which includes a diffusion component, a sample injection component, and a sampling component. The diffusion component is provided with an accommodation space, a first channel, and a second channel. The accommodation space is used to place the sample to be tested, and the first channel and the second channel are respectively communicated with the accommodation space; the sample injection component is used to provide a first solution to the first channel and a second solution to the second channel, and the concentration of the first solution is greater than that of the second solution; the sampling component is arranged in the first channel and is used to obtain the first solution flowing through the sample to be tested.

[0005] In the diffusion coefficient measuring device of this application, the accommodation space of the diffusion component is used to place the sample to be tested, the first channel and the second channel are communicated with the accommodation space, and the sample injection component can provide a first solution to the first channel and a second solution to the second channel. The concentration of the first solution is greater than that of the second solution. Under the action of the concentration difference, the first solution penetrates through the diffusion component to the second solution, that is, the nuclides in the first solution penetrate through the sample injection component to the second solution, and the nuclide concentration in the first solution decreases. The sampling component is arranged in the first channel and obtains the first solution flowing through the sample to be tested. By measuring the first solution with the reduced concentration, the diffusion coefficient of the sample to be tested can be obtained. Since the sampling component obtains the first solution in the first channel and does not need to wait for the nuclides to diffuse to the other side of the sample to be tested, the diffusion coefficient can be calculated through the reduced concentration of the first solution. In other words, the sampling of the sampling component is not affected by the diffusion time. When the first solution is introduced into the sample injection component, sampling can be carried out, which effectively improves the measurement efficiency and saves the measurement time. In addition, the operations of the sample injection component and the sampling component corresponding to the first solution are both located in the first channel and will not be affected by the convection of the second solution in the second channel, etc., which can effectively improve the accuracy of the measurement results and improve the measurement precision.

[0006] In some implementations of the present application, the first channel includes a first chamber, the second channel includes a second chamber, the first chamber and the second chamber are respectively docked with the accommodation space; and the first chamber and the second chamber are respectively located on opposite sides of the accommodation space.

[0007] Here, by providing the first chamber and the second chamber, the contact area of the first solution and the second solution with respect to the test sample in the accommodation space can be increased, thereby improving the penetration efficiency. Moreover, the first chamber and the second chamber located on opposite sides of the accommodation space have a symmetrical structure, which helps to improve the uniformity of penetration.

[0008] In some implementations of the present application, when projected along a preset direction, the projection of the first chamber overlaps with the projection of the second chamber, and the projection of the accommodation space covers the projections of the first chamber and the second chamber; the preset direction is the relative direction of the first chamber and the second chamber.

[0009] Here, the projection of the accommodation space covers the first chamber and the second chamber. While increasing the contact area of the first solution and the second solution with respect to the test sample, it is convenient to isolate the first chamber and the second chamber through the test sample, and it is not easy for the first solution and the second solution to pass through the gap between the test sample and the accommodation space.

[0010] In some implementations of the present application, the diffusion component includes a first base body and a second base body, and the first base body and the second base body are relatively buckled; the first base body is provided with a first chamber, the second base body is provided with a second chamber, and the accommodation space is surrounded by the first base body and the second base body.

[0011] Here, by providing the relatively buckled first base body and second base body, on the one hand, it is convenient to take and place the test sample, and on the other hand, it is also convenient for the processing of the first chamber, the second chamber and the accommodation space.

[0012] In some implementations of the present application, the first base body includes a first connecting portion, the second base body includes a second connecting portion, and the first connecting portion is detachably connected to the second connecting portion.

[0013] Here, by providing the first connecting portion and the second connecting portion, it is convenient for the disassembly or assembly of the first base body and the second base body.

[0014] In some implementations of the present application, the diffusion coefficient measuring device further includes a sealing structure, the sealing structure includes a sealing member and a mounting groove, the mounting groove is provided on the first base body or the second base body and surrounds the accommodation space, and at least part of the sealing member is received in the mounting groove and abuts against the first base body and the second base body respectively.

[0015] Here, a sealing structure is provided between the first substrate and the second substrate. The seal of the sealing structure can isolate the accommodation space from the outside world, reduce the interference of the external environment on the measurement result, improve the measurement accuracy, and the installation groove can limit the seal to keep the seal in a strong sealing position.

[0016] In some implementation manners of the present application, the first channel includes a first pore, and the second channel includes a second pore; the first pore and the second pore are docked with corresponding sample injection assemblies or sampling assemblies; and the extending axes of the first pore and the second pore are broken lines or curves.

[0017] Here, setting the first pore and the second pore facilitates docking with the sample injection assembly and the sampling assembly, and the broken line or curve setting of the first pore and the second pore can slow down the fluid impact so that the first solution and the second solution enter the accommodation space evenly.

[0018] In some implementation manners of the present application, docking structures are provided corresponding to the pores on the outer side of the diffusion assembly, and the docking structures are used to connect the corresponding sample injection assemblies or sampling assemblies.

[0019] Here, by providing the docking structures, it is convenient to connect the first flow channel and the second flow channel to the corresponding sample injection assemblies and sampling assemblies, and the docking structures can also provide support, thereby improving the connection stability.

[0020] In some implementation manners of the present application, the sample injection assembly includes a first pump body and a second pump body. The first pump body is connected to the first channel and provides a first solution; the second pump body is connected to the second channel and provides a second solution, and the flow rates of the first pump body and the second pump body are the same.

[0021] Here, setting the first pump body facilitates continuously providing the first solution to the first channel, setting the second pump body facilitates continuously providing the second solution to the second channel, and the same flow rates of the first pump body and the second pump body help to eliminate interference factors and improve the measurement accuracy.

[0022] In some implementation manners of the present application, the diffusion coefficient measuring device further includes a liquid collecting tank, and the liquid collecting tank is arranged in the second channel and is used to obtain the second solution flowing through the sample to be tested.

[0023] Here, setting the liquid collecting tank can collect and store the second solution flowing through the sample to be tested, facilitate the recycling and treatment of the second solution, and is beneficial to environmental protection. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the diffusion coefficient measuring device provided by the embodiment of the present application;

[0025] Figure 2 It is a schematic structural diagram of the diffusion assembly in the diffusion coefficient measuring device provided by the embodiment of the present application;

[0026] Figure 3 It is a top view of the diffusion coefficient measuring device provided by the embodiment of the present application;

[0027] Figure 4 provided by the embodiment of the present application Figure 3 The sectional view along A-A in;

[0028] Figure 5 It is a schematic structural diagram of the second substrate in the diffusion coefficient measuring device provided by the embodiment of the present application;

[0029] Figure 6 It is a schematic structural diagram of the first substrate in the diffusion coefficient measuring device provided by the embodiment of the present application.

[0030] Reference numerals:

[0031] 100 - Diffusion assembly; 110 - Accommodating space; 120 - First channel; 121 - First chamber; 122 - First pore; 130 - Second channel; 131 - Second chamber; 132 - Second pore; 140 - First substrate; 141 - First connection part; 150 - Second substrate; 151 - Second connection part; 160 - Docking structure; 200 - Sampling assembly; 210 - First pump body; 220 - Second pump body; 300 - Sampling component; 400 - Sealing structure; 410 - Seal; 420 - Installation groove; 500 - Liquid collection tank; 600 - Specimen to be tested; X - Predetermined direction. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will further describe the specific technical solutions of the present application in detail with reference to the accompanying drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not used to limit the scope of the present application.

[0033] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0034] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", and "right" are defined relative to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the drawings.

[0035] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium.

[0036] In the embodiments of the present application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0037] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0038] The embodiments of the present application provide a diffusion coefficient measuring device for measuring the diffusion coefficient of radionuclides in rock and soil. The permeation diffusion method is a method for measuring the diffusion coefficient of radionuclides in rock and soil. Its principle is that radionuclides diffuse and penetrate the rock medium from the source term pool with a higher concentration under the action of a concentration difference and enter the receiving pool, and the diffusion coefficient of radionuclides in rock and soil is calculated by measuring the change in the concentration of radionuclides.

[0039] In some technical solutions, during the sampling and device placement process, the solutions in the source term pool and the receiving pool form convection due to the change in liquid level. The change in the concentration of radionuclides in the receiving pool is no longer only related to the concentration difference, but also affected by the change in liquid level, resulting in the calculated diffusion coefficient deviating from the true value. In addition, the measurement process is relatively time-consuming. Especially for strongly adsorbed radionuclides, it usually takes several months to complete the measurement. During the long-term experiment process, it is difficult to keep the experimental conditions of parallel experiments constant, which will also cause the experimental results to deviate from the true value.

[0040] Refer to Figure 1 and Figure 2, an embodiment of the present application provides a diffusion coefficient measuring device, which includes a diffusion component 100, a sample injection component 200, and a sampling component 300. The diffusion component 100 is provided with an accommodation space 110, a first channel 120, and a second channel 130. The accommodation space 110 is used to place the sample to be tested 600, and the first channel 120 and the second channel 130 are respectively communicated with the accommodation space 110; the sample injection component 200 is used to provide a first solution to the first channel 120 and a second solution to the second channel 130, and the concentration of the first solution is greater than that of the second solution; the sampling component 300 is arranged in the first channel 120, and the sampling component 300 is used to obtain the first solution flowing through the sample to be tested 600.

[0041] In the embodiment of the present application, the accommodation space 110 of the diffusion component 100 is used to accommodate the sample to be tested 600. The cross-sectional shape of the accommodation space 110 can be set to a square, a circle, an ellipse, a triangle, a trapezoid, etc. The shape and size of the accommodation space 110 are adapted to those of the sample to be tested 600. In some examples, multiple different diffusion components 100 can also be set, and different diffusion components 100 have accommodation spaces 110 with different shapes or sizes to meet different measurement requirements.

[0042] In the embodiment of the present application, the first channel 120 and the second channel 130 are respectively communicated with the accommodation space 110. In other words, the first channel 120 and the second channel 130 are relatively isolated, and the first solution in the first channel 120 needs to diffuse through the sample to be tested 600 to the second channel 130.

[0043] In the embodiment of the present application, the sample injection component 200 is used to provide the first solution and the second solution. It can be understood that the first solution and the second solution need to be isolated so that the first solution enters the first channel 120 and the second solution enters the second channel 130. For example, the sample injection component 200 includes different pump bodies and containers, and the containers contain the first solution or the second solution, and the pump bodies pump the solution in the corresponding containers into the first channel 120 or the second channel 130.

[0044] In the embodiment of the present application, the sampling component 300 can be manual or automatic. The sampling component 300 can include components such as a sampling tube, a valve body, a liquid distributor, a filter, etc. The sampling component 300 can also include a timing device to obtain the first solution at a set time point or time period. The sampling component 300 can also include a quantitative device to obtain a set volume of the first solution.

[0045] In the embodiment of the present application, the concentration of the first solution is greater than that of the second solution, which means that the content of the radionuclide per unit volume in the first solution is higher than the content of the corresponding volume and corresponding nuclide in the second solution. For example, the first solution is a solution containing the element tritium ( 3 H), and the second solution is a solution without tritium element.

[0046] In the technical solution of the embodiment of the present application, the accommodation space 110 of the diffusion component 100 is used to place the sample to be tested 600. The first channel 120 and the second channel 130 communicate with the accommodation space 110, and the sample injection component 200 can supply a first solution to the first channel 120 and supply a second solution to the second channel 130. The concentration of the first solution is greater than that of the second solution. Under the action of the concentration difference, the first solution diffuses and migrates through the diffusion component 100 to the second solution, that is, the nuclide in the first solution penetrates into the sample injection component 200 and transfers to the second solution, and the nuclide concentration in the first solution decreases. The sampling component 300 is arranged in the first channel 120. The sampling component 300 obtains the first solution flowing through the sample to be tested 600. By measuring the first solution with a reduced concentration, the diffusion coefficient of the sample to be tested 600 can be obtained.

[0047] Since the sampling component 300 obtains the first solution in the first channel 120 and does not need to wait for the nuclide to diffuse to the other side of the sample to be tested 600, the diffusion coefficient can be calculated through the reduced concentration of the first solution. In other words, the sampling of the sampling component 300 is not affected by the diffusion time. When the sample injection component 200 injects the first solution, sampling can be carried out, effectively improving the measurement efficiency and saving the measurement time. In addition, the operations of the sample injection component 200 and the sampling component 300 corresponding to the first solution are both located in the first channel 120 and will not be affected by the convection of the second solution in the second channel 130, which can effectively improve the accuracy of the measurement result and improve the measurement precision.

[0048] Refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 6 In some embodiments of the present application, the first channel 120 includes a first chamber 121, the second channel 130 includes a second chamber 131, and the first chamber 121 and the second chamber 131 are respectively docked with the accommodation space 110; and the first chamber 121 and the second chamber 131 are respectively located on opposite sides of the accommodation space 110.

[0049] In the embodiment of the present application, the cross-sectional shape of the first chamber 121 can be a regular or irregular shape such as a square, a circle, a ring, a triangle, a trapezoid, etc., and the cross-sectional shape of the second chamber 131 can also be a regular or irregular shape such as a square, a circle, a ring, a triangle, a trapezoid, etc. The first chamber 121 and the second chamber 131 can have the same or different structures. In some examples, both the first chamber 121 and the second chamber 131 are of a cuboid structure and are symmetric in structure.

[0050] In some examples, the height dimensions of the first chamber 121 and the second chamber 131 are smaller than the width dimension and the length dimension, so as to form a flattened chamber structure, which not only maintains a large contact area between the first solution and the second solution relative to the specimen 600 to be tested, but also reduces the dimensions of the first chamber 121 and the second chamber 131, forming a microchannel, which helps with miniaturization of the structure and meets the requirements of precise and efficient measurement.

[0051] In the embodiments of the present application, the docking of the first chamber 121 with the accommodation space 110 means that the first chamber 121 and the accommodation space 110 are connected and communicate with each other, and correspondingly, the second chamber 131 is also connected and communicates with the accommodation space 110. The first chamber 121, the accommodation space 110 and the second chamber 131 together form an integral spatial structure.

[0052] In the embodiments of the present application, the opposite sides of the accommodation space 110 refer to the two symmetric sides of its structure. For example, if the accommodation space 110 is cylindrical, its bottom surface and top surface are the opposite sides; another example is that if the accommodation space 110 is rectangular, the two parallel sides are the opposite sides. By way of example, the accommodation space 110 is a cuboid structure, and the first chamber 121 and the second chamber 131 are respectively arranged on the two sides perpendicular to the height direction of the accommodation space 110.

[0053] The technical solution of the embodiments of the present application can increase the contact area between the first solution and the second solution relative to the specimen 600 in the accommodation space 110 by setting the first chamber 121 and the second chamber 131, thereby improving the penetration efficiency. Moreover, the first chamber 121 and the second chamber 131 located on the opposite sides of the accommodation space 110 are symmetric in structure, which helps to improve the uniformity of penetration.

[0054] Refer to Figure 4 、 Figure 5 and Figure 6 In some embodiments of the present application, when projected along the preset direction X, the projection of the first chamber 121 overlaps with the projection of the second chamber 131, and the projection of the accommodation space 110 covers the projections of the first chamber 121 and the second chamber 131; the preset direction X is the relative direction between the first chamber 121 and the second chamber 131.

[0055] In the embodiments of the present application, the preset direction X is the relative direction between the first chamber 121 and the second chamber 131. In other words, the first chamber 121 and the second chamber 131 are symmetric about a preset plane (such as the central plane of the accommodation space 110), and the preset direction X is the direction perpendicular to this preset plane. By way of example, the preset direction X is the height direction of the accommodation space 110.

[0056] In the embodiments of the present application, when projected along the preset direction X, the projections of the first chamber 121 and the second chamber 131 overlap, which may be partial overlap. In one example, a partial projection of the first chamber 121 overlaps with the entire projection of the second chamber 131; in another example, a partial projection of the second chamber 131 overlaps with the entire projection of the first chamber 121; in still another example, a partial projection of the first chamber 121 overlaps with a partial projection of the second chamber 131. The projections of the first chamber 121 and the second chamber 131 may also be completely overlapped. In still another example, the entire projection of the first chamber 121 overlaps with the entire projection of the second chamber 131, and their sizes and positions are the same.

[0057] In the embodiments of the present application, the projection of the accommodation space 110 covers the projection of the first chamber 121, that is, the projection size of the accommodation space 110 is greater than or equal to the projection size of the first chamber 121, and the entire projection of the first chamber 121 overlaps with the projection of the accommodation space 110, and a part or all of the projection of the accommodation space 110 overlaps with the projection of the first chamber 121. Correspondingly, the projection of the accommodation space 110 covers the projection of the second chamber 131, that is, the projection size of the accommodation space 110 is greater than or equal to the projection size of the second chamber 131, and the entire projection of the second chamber 131 overlaps with the projection of the accommodation space 110, and a part or all of the projection of the accommodation space 110 overlaps with the projection of the second chamber 131. In some examples, the projection of the accommodation space 110 covers both the projection of the first chamber 121 and the projection of the second chamber 131.

[0058] In some examples, the outer contour of the diffusion component 100, the accommodation space 110, the first chamber 121, and the second chamber 131 are all rectangular parallelepiped structures, and the length directions of the accommodation space 110, the first chamber 121, and the second chamber 131 correspond to the length direction of the outer contour of the diffusion component 100, the width directions of the accommodation space 110, the first chamber 121, and the second chamber 131 correspond to the width direction of the outer contour of the diffusion component 100, and the height directions of the accommodation space 110, the first chamber 121, and the second chamber 131 correspond to the height direction of the outer contour of the diffusion component 100 (for example, the preset direction X).

[0059] In the technical solution of the embodiments of the present application, the projection of the accommodation space 110 covers the first chamber 121 and the second chamber 131. While increasing the contact area of the first solution and the second solution with respect to the test sample 600, it is convenient to isolate the second chamber 131 of the first chamber 121 through the test sample 600, and the first solution and the second solution are not likely to pass through the gap between the test sample 600 and the accommodation space 110.

[0060] Refer to Figure 2 、 Figure 4 、 Figure 5 and Figure 6, in some embodiments of the present application, the diffusion component 100 includes a first base body 140 and a second base body 150, and the first base body 140 and the second base body 150 are relatively fastened; the first base body 140 is provided with a first chamber 121, the second base body 150 is provided with a second chamber 131, and the accommodation space 110 is enclosed by the first base body 140 and the second base body 150.

[0061] In the embodiments of the present application, the structure of the first base body 140 can be a regular or irregular shape such as a square, a sphere, an ellipsoid, a prism, a cylinder, etc., and the structure of the second base body 150 can also be a regular or irregular shape such as a square, a sphere, an ellipsoid, a prism, a cylinder, etc. The first base body 140 and the second base body 150 can adopt the same or different structures. In some examples, both the first base body 140 and the second base body 150 are of a cuboid structure, and the first base body 140 and the second base body 150 are relatively fastened along a preset direction X.

[0062] In the embodiments of the present application, the accommodation space 110 can be provided in the first base body 140, or can be provided in the second base body 150, or alternatively, a part of the accommodation space 110 is provided in the first base body 140 and the other part is provided in the second base body 150. In some examples, the accommodation space 110 is entirely provided in the first base body 140.

[0063] The technical solution of the embodiments of the present application sets the first base body 140 and the second base body 150 that are relatively fastened. On the one hand, it is convenient to pick up and place the test sample 600, and on the other hand, it is also convenient for the processing of the first chamber 121, the second chamber 131 and the accommodation space 110.

[0064] Refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 , in some embodiments of the present application, the first base body 140 includes a first connection portion 141, the second base body 150 includes a second connection portion 151, and the first connection portion 141 is detachably connected to the second connection portion 151.

[0065] In the embodiments of the present application, the detachable connection between the first connection portion 141 and the second connection portion 151 can be a snap connection, a threaded connection, a fastener connection, etc. In some examples, the first connection portion 141 includes a card slot, the second connection portion 151 includes a hook, and the hook is in snap-fit with the card slot; in other examples, the first connection portion 141 includes an internal thread, the second connection portion 151 includes an external thread, and the internal thread is in screw-fit with the external thread; in still other examples, the first connection portion 141 includes a connection hole, and the second connection portion 151 also includes a connection hole, and fasteners such as bolts and screws pass through the connection holes of the first base body 140 and the second base body 150 to achieve locking, wherein the connection hole can be a smooth hole, a threaded hole, a stepped hole, etc.

[0066] In the embodiments of the present application, the first connecting portion 141 may be one or more, and the second connecting portion 151 may also be one or more. One first connecting portion 141 may correspond to multiple second connecting portions 151, or one second connecting portion 151 may correspond to multiple first connecting portions 141, or multiple first connecting portions 141 and multiple second connecting portions 151 are connected in a one-to-one correspondence. In some examples, the first connecting portion 141 is a connecting hole, and there are multiple first connecting portions 141, and the multiple first connecting portions 141 are uniformly arranged along the edge of the first base body 140, and the second connecting portion 151 is arranged in a one-to-one correspondence with the first connecting portion 141.

[0067] The technical solution of the embodiments of the present application provides the first connecting portion 141 and the second connecting portion 151, which facilitates the disassembly or assembly of the first base body 140 and the second base body 150.

[0068] Refer to Figure 4 and Figure 6 In some embodiments of the present application, the diffusion coefficient measuring device further includes a sealing structure 400. The sealing structure 400 includes a sealing member 410 and a mounting groove 420. The mounting groove 420 is provided on the first base body 140 or the second base body 150 and surrounds the accommodation space 110. At least a part of the sealing member 410 is accommodated in the mounting groove 420 and abuts against the first base body 140 and the second base body 150 respectively.

[0069] In the embodiments of the present application, the mounting groove 420 may be provided on the side of the first base body 140 facing the second base body 150, or may be provided on the side wall of the second base body 150 facing the first base body 140, or mounting grooves 420 are provided on both the first base body 140 and the second base body 150. A part of the mounting member is accommodated in the mounting groove 420 of the first base body 140, and the other part is accommodated in the mounting groove 420 of the second base body 150.

[0070] In the embodiments of the present application, the sealing member 410 may be a sealing filler, a gasket, a sealing ring, etc. The sealing member 410 may be made of elastic materials such as elastic plastics, rubbers, and silicones, so as to maintain the abutment against the first base body 140 and the second base body 150 and improve the sealing performance.

[0071] The technical solution of the embodiments of the present application provides a sealing structure 400 between the first base body 140 and the second base body 150. The sealing member 410 of the sealing structure 400 can isolate the accommodation space 110 from the outside world, reduce the interference of the external environment on the measurement result, improve the measurement accuracy, and the mounting groove 420 can limit the sealing member 410 so as to keep the sealing member 410 in a powerful sealing position.

[0072] Refer to Figure 2 、 Figure 4 、Figure 5 and Figure 6 , in some embodiments of the present application, the first channel 120 includes a first duct 122, and the second channel 130 includes a second duct 132; the first duct 122 and the second duct 132 are respectively connected to the corresponding sample introduction assembly 200 or sampling assembly 300; and the extension axes of the first duct 122 and the second duct 132 are broken lines or curves.

[0073] In the embodiments of the present application, the first duct 122 is disposed in the first substrate 140. One end of the first duct 122 is disposed in the first chamber 121, and the other end is disposed on the outer surface of the first substrate 140. The extension axis of the first duct 122 can be a broken line, a curve or a straight line; in some examples, the extension axis of the first duct 122 is approximately in an "L" shape. In other words, the two ends of the first duct 122 are respectively located on adjacent surfaces of the first substrate 140. Exemplarily, the part of the first duct 122 connected to the first chamber 121 is disposed along the preset direction X, and the other part of the first duct 122 is disposed along the length direction of the first substrate 140.

[0074] It can be understood that the first substrate 140 includes at least two first ducts 122, at least one of which is connected to the sample introduction assembly 200, and at least another one is connected to the sampling assembly 300. In some examples, the sampling assembly 300 or the sample introduction assembly 200 can correspond to multiple first ducts 122. In some examples, the first channel 120 includes two "L"-shaped first ducts 122, and the two first ducts 122 are symmetrically distributed on both sides of the first chamber 121.

[0075] In the embodiments of the present application, the second duct 132 is disposed in the second substrate 150. One end of the second duct 132 is disposed in the second chamber 131, and the other end is disposed on the outer surface of the second substrate 150. The extension axis of the second duct 132 can be a broken line, a curve or a straight line; in some examples, the extension axis of the second duct 132 is approximately in an "L" shape. In other words, the two ends of the second duct 132 are respectively located on adjacent surfaces of the second substrate 150. Exemplarily, the part of the second duct 132 connected to the second chamber 131 is disposed along the preset direction X, and the other part of the second duct 132 is disposed along the length direction of the second substrate 150.

[0076] It can be understood that the second substrate 150 includes at least two second ducts 132, at least one of which is connected to the sample introduction assembly 200, and at least another one is connected to the liquid collection tank 500. In some examples, the liquid collection tank 500 or the sample introduction assembly 200 can correspond to multiple second ducts 132. In some examples, the second channel 130 includes two "L"-shaped second ducts 132, and the two second ducts 132 are symmetrically distributed on both sides of the second chamber 131.

[0077] In the technical solution of the embodiment of the present application, the first channel 122 and the second channel 132 are provided to facilitate the docking of the sample injection assembly 200 and the sampling assembly 300. The zigzag or curved arrangement of the first channel 122 and the second channel 132 can slow down the fluid impact so that the first solution and the second solution can enter the accommodation space 110 evenly.

[0078] Referring to Figure 2 , Figure 4 , Figure 5 and Figure 6 , in some embodiments of the present application, docking structures 160 are provided on the outer sides of the diffusion assembly 100 corresponding to the first flow channel and the second flow channel. The docking structures 160 are used to connect the corresponding sample injection assembly 200 or sampling assembly 300.

[0079] In the embodiment of the present application, the docking structure 160 can be a hollow recessed structure, a protruding structure, a threaded structure portion, a columnar structure, etc. In some examples, the docking structure 160 is a tubular structure, which is convenient for realizing docking.

[0080] In the embodiment of the present application, the docking structure 160 is arranged at the position on the outer surface of the first base body 140 corresponding to the first flow channel and the position on the outer surface of the second base body 150 corresponding to the second flow channel. The docking structure 160 can be integrally formed with the corresponding first base body 140 or second base body 150 to improve the connection stability.

[0081] In the technical solution of the embodiment of the present application, by providing the docking structure 160, the first flow channel and the second flow channel can be conveniently connected to the corresponding sample injection assembly 200 and sampling assembly 300, and the docking structure 160 can also provide support, thereby improving the connection stability.

[0082] Referring to Figure 1 , in some embodiments of the present application, the sample injection assembly 200 includes a first pump body 210 and a second pump body 220. The first pump body 210 is connected to the first channel 120 and provides a first solution; the second pump body 220 is connected to the second channel 130 and provides a second solution, and the flow rates of the first pump body 210 and the second pump body 220 are the same.

[0083] In the embodiment of the present application, the first pump body 210 can be a centrifugal pump, a reciprocating pump, a gear pump, a screw pump, a diaphragm pump, etc., and the second pump body 220 can also be a centrifugal pump, a reciprocating pump, a gear pump, a screw pump, a diaphragm pump, etc. The first pump body 210 and the second pump body 220 can be the same or different. In some examples, both the first pump body 210 and the second pump body 220 are micro-injection pumps.

[0084] In the technical solution of the embodiment of the present application, the first pump body 210 is provided to continuously supply the first solution to the first channel 120, and the second pump body 220 is provided to continuously supply the second solution to the second channel 130. The first pump body 210 and the second pump body 220 maintain the same flow rate, which helps to eliminate interference factors and improve the measurement accuracy.

[0085] Referring Figure 1 , in some embodiments of the present application, the diffusion coefficient measuring device further includes a liquid collecting tank 500. The liquid collecting tank 500 is disposed in the second channel 130, and the liquid collecting tank 500 is used to obtain the second solution flowing through the sample to be tested 600.

[0086] In the embodiment of the present application, the liquid collecting tank 500 is used to collect the second solution so that the second pump body 220 can continuously supply the second solution to the second channel 130, and the second solution can be recycled after being collected by the liquid collecting tank 500. The liquid collecting tank 500 may further include a filtering structure, a liquid level detection structure, an overflow structure, etc.

[0087] In the technical solution of the embodiment of the present application, setting the liquid collecting tank 500 can collect and store the second solution flowing through the sample to be tested 600, which is convenient for recycling and treating the second solution and is beneficial to environmental protection.

[0088] In a possible embodiment of the present application, the diffusion coefficient measuring device includes a diffusion assembly 100, a sample injection assembly 200, a sampling assembly 300, and a liquid collection tank 500. The diffusion assembly 100 includes a first base body 140 and a second base body 150 that are relatively fastened. The first base body 140 is provided with a first chamber 121 and two first channels 120 communicating with the first chamber 121. One of the first channels 120 is connected to a first pump body 210 through a corresponding docking structure 160, and the other first channel 120 is connected to the sampling assembly 300 through a corresponding docking structure 160. The first base body 140 is further provided with a receiving space 110, and the receiving space 110 is located on the side of the first chamber 121 close to the second base body 150. The second base body 150 is provided with a second chamber 131 and two second channels 130 communicating with the second chamber 131. One of the second channels 130 is connected to a second pump body 220 through a corresponding docking structure 160, and the other second channel 130 is connected to the liquid collection tank 500 through a corresponding docking structure 160. The first pump body 210 and the second pump body 220 are connected to the same side of the diffusion assembly 100, and the sampling assembly 300 and the liquid collection tank 500 are arranged on the same side of the diffusion assembly 100. The first base body 140 is further provided with a mounting groove 420, the mounting groove 420 surrounds the receiving space 110, and a sealing member 410 is arranged in the mounting groove 420. The sealing member 410 abuts against the first base body 140 and the second base body 150 respectively. The first base body 140 is provided with a plurality of first connecting portions 141. The first connecting portions 141 are connecting holes, and the axes of the connecting holes are arranged along the relative direction of the first base body 140 and the second base body 150. The plurality of first connecting portions 141 are arranged around the edge of the first base body 140. At the positions corresponding to the first connecting portions 141, the second base body 150 is further provided with corresponding second connecting portions 151. The second connecting portions 151 are also connecting holes, and fasteners pass through the first connecting portions 141 and the second connecting portions 151 to lock and fix the first base body 140 and the second base body 150.

[0089] In the preparation stage before measurement, the test sample 600 (such as a granite chip, etc.) is cut according to the size of the receiving space 110 so that the size of the test sample 600 is adapted to the size of the receiving space 110. First, the test sample 600 is saturated in deionized water with pH (acidity and alkalinity) = 6 for 24 h (hours), and then the test sample 600 is placed in the receiving space 110. The first base body 140 and the second base body 150 are locked and fixed through fasteners, and the first channels 120 are respectively communicated with the first pump body 210 and the sampling assembly 300, and the second channels 130 are respectively communicated with the second pump body 220 and the liquid collection tank 500.

[0090] During the measurement process, a first solution is injected into the first channel 120 through the first pump body 210. The first solution is a solution with a relatively high nuclide concentration. For example, the first solution is 1.126×10 -8Tritiated water at a concentration of -5 mol / L (pH = 6). The second solution is injected into the second channel 130 through the second pump body 220. The second solution is a solution with a lower concentration. For example, the second solution is deionized water and has the same pH as the tritiated water. The first pump body 210 and the second pump body 220 adopt the same flow rate. For example, the flow rate is set to 2.5×10

[0091] m / s. The first solution and the second solution flow through the test sample 600 respectively. The nuclide in the first solution penetrates into the test sample 600 under the action of the concentration difference, and the concentration of the nuclide in the first solution flowing through the test sample 600 decreases. 3 The first solution flowing through the test sample 600 is collected regularly by the sampling assembly 300. For example, the first solution can be collected at time points such as 15 min (minutes), 1 h (hour), 2 h, 4 h, 6 h, 8 h, 10 h, 12 h, 14 h, 16 h, 18 h, 20 h, 22 h, 24 h, 26 h, 28 h, etc. after pumping in the first solution. By measuring the nuclide concentration in the first solution collected at different time periods, the nuclide penetration curve at different times can be obtained, and the measurement of the diffusion coefficient can be realized. For example, a liquid scintillation counter is used to measure the 3 concentration of

[0092] H in the collected solution, and the penetration curve of 3 H at different diffusion times is obtained.

[0093] In some possible implementation schemes, the outer contour dimensions of the diffusion assembly 100 are 70 mm (millimeters) × 50 mm × 25 mm, the dimensions of the accommodation space 110 are 25 mm × 10 mm × 5 mm, the dimensions of the first chamber 121 and the second chamber 131 are 20 mm × 5 mm × 0.5 mm, and the diameters of the first channel 122 and the second channel 132 are 1 mm. The diffusion assembly 100 has the advantages of miniaturization and light weight, which is convenient for processing and carrying out measurements.

[0094] It should be noted that the numerical values of parameters such as the structural dimensions, solution concentration, flow rate, and time in the embodiments of the present application are only examples and should not be regarded as limitations on the embodiments of the present application. The parameters such as dimensions, solution concentration, flow rate, and time can adopt appropriate numerical values according to the measurement requirements.

[0095] The serial numbers of the embodiments of the present application above are only for description and do not represent the superiority or inferiority of the embodiments. The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A diffusion coefficient measuring device, characterized in that, Comprising: A diffusion component, provided with an accommodation space, a first channel and a second channel, the accommodation space being for placing a specimen to be tested, the first channel and the second channel being respectively communicated with the accommodation space; A sample injection component, for supplying a first solution to the first channel and a second solution to the second channel, the concentration of the first solution being greater than that of the second solution; A sampling component, arranged in the first channel, the sampling component being for obtaining the first solution flowing through the specimen to be tested.

2. The diffusion coefficient measuring device according to claim 1, characterized in that The first channel includes a first chamber, the second channel includes a second chamber, the first chamber and the second chamber are respectively docked with the accommodation space; and the first chamber and the second chamber are respectively located on opposite sides of the accommodation space.

3. The diffusion coefficient measuring device according to claim 2, characterized in that, Projected along a preset direction, the projection of the first chamber overlaps with the projection of the second chamber, and the projection of the accommodation space covers the projections of the first chamber and the second chamber; The preset direction is the relative direction of the first chamber and the second chamber.

4. The diffusion coefficient measuring device according to claim 2, characterized in that, The diffusion component includes a first base body and a second base body, the first base body and the second base body being buckled relatively; The first base body is provided with the first chamber, the second base body is provided with the second chamber, and the accommodation space is enclosed by the first base body and the second base body.

5. The diffusion coefficient measuring device according to claim 4, characterized in that, The first base body includes a first connection portion, the second base body includes a second connection portion, and the first connection portion is detachably connected to the second connection portion.

6. The diffusion coefficient measuring device according to claim 4, characterized in that It further includes a sealing structure, the sealing structure including a sealing member and a mounting groove, the mounting groove being arranged on the first base body or the second base body and surrounding the accommodation space, at least part of the sealing member being received in the mounting groove and respectively abutted against the first base body and the second base body.

7. The diffusion coefficient measuring device according to any one of claims 1 to 6, characterized in that, The first channel includes a first pore, the second channel includes a second pore; The first pore and the second pore are docked with the corresponding sample injection component or sampling component; and the extension axes of the first pore and the second pore are broken lines or curves.

8. The diffusion coefficient measuring device according to any one of claims 1 to 6, characterized in that, Docking structures are respectively arranged on the outside of the diffusion component corresponding to the first flow channel and the second flow channel, the docking structures being for connecting the corresponding sample injection component or sampling component.

9. The diffusion coefficient measuring device according to any one of claims 1 to 6, characterized in that, The sample injection component includes a first pump body and a second pump body, the first pump body being connected to the first channel and supplying the first solution; the second pump body being connected to the second channel and supplying the second solution, and the flow rate of the first pump body being the same as that of the second pump body.

10. The diffusion coefficient measuring device according to any one of claims 1 to 6, characterized in that, It further includes a liquid collection tank, the liquid collection tank being arranged in the second channel, the liquid collection tank being for obtaining the second solution flowing through the specimen to be tested.

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