Permeability testing device

Abstract

The utility model provides a permeability testing device. The permeability testing device comprises a testing tube and a meter. The test tube is used for placing a test sample and accommodating test liquid, a first communication hole is formed in the side wall of the test tube, and the first communication hole is used for discharging or adding the test liquid. And the meter is placed below the test tube and is used for metering the volume or weight of the test liquid permeated from the test tube. The permeability testing device provided by the utility model can be used for testing the permeability.

Description

Technical Field

[0001] The present application belongs to the technical field of permeability testing, and more specifically, relates to a permeability testing device. Background Art

[0002] Porous materials include porous ceramics, porous glass, and porous membranes. Porous materials have a wide range of uses. For example, porous ceramics can be used in the atomization core of an atomization device.

[0003] Before porous materials are applied, a permeability test is usually required, so a permeability testing device is needed to perform the permeability test. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a permeability testing device for performing permeability testing.

[0005] To achieve the above objectives, the technical solution adopted in this application is:

[0006] A permeability testing device is provided, comprising a test tube and a meter. The test tube is used to hold a test sample and a test liquid. A first communication hole is provided on the side wall of the test tube for draining or adding the test liquid. The meter is placed below the test tube and is used to measure the volume or weight of the test liquid that permeates the test tube.

[0007] Through the above-described technical solution, the permeability testing device provided by the present application can utilize the first communicating hole to discharge or add test liquid, providing a structural basis for maintaining the test liquid level at the lowest point of the first communicating hole, thereby facilitating a constant test liquid level and enabling accurate permeability testing. Furthermore, the meter can measure the volume or weight of the test liquid that permeates the test tube, thereby enabling calculation of the permeability test results.

[0008] Therefore, the permeability testing device provided in this application can perform permeability testing.

[0009] In some embodiments, a protruding limiting protrusion is provided on the inner side surface of the test tube, and the limiting protrusion is used to carry the test sample. The limiting protrusion and the first communicating hole are spaced apart along the length direction of the test tube.

[0010] In this way, the limiting protrusion can carry the test sample, and can position the test sample so that the test sample is stably placed in the test tube, thereby facilitating improving the accuracy of the test results.

[0011] In some embodiments, the limiting protrusion extends along the side of the test tube, and the extension direction of the limiting protrusion is perpendicular to the length direction of the test tube; or, there are multiple limiting protrusions, and the multiple limiting protrusions are spaced apart along the side of the test tube, and the spacing direction of the multiple limiting protrusions is perpendicular to the length direction of the test tube.

[0012] In this way, the limiting protrusion provides better support for the test sample, which is beneficial to improving the stability of the test sample.

[0013] In some embodiments, the permeability testing device further includes a sealing member, which is annular and is at least configured to be sleeved on a circumference of the test sample.

[0014] In this way, the sealing member can prevent the test liquid from leaking from the gap between the test sample and the inner wall surface of the test cylinder.

[0015] In some embodiments, the seal includes a first sealing portion and a second sealing portion connected to each other, the first sealing portion is annular and is sleeved around the circumference of the test sample, and the second sealing portion is annular and is disposed at the bottom of the test sample.

[0016] In this way, the sealing member can double-seal the gap between the test sample and the inner wall surface of the test cylinder, thereby further preventing the test liquid from leaking from the gap between the test sample and the inner wall surface of the test cylinder.

[0017] In some embodiments, the first sealing portion is integrally connected to the second sealing portion, so that the sealing member is easy to manufacture.

[0018] In some embodiments, the first communicating hole is used to discharge the test liquid, and the side wall of the test tube is further provided with a second communicating hole, and the second communicating hole is used to add the test liquid into the test tube. The minimum distance between the side of the first communicating hole and the test sample is equal to a preset distance, and the minimum distance between the side of the second communicating hole and the test sample is greater than or equal to the preset distance.

[0019] In this way, the permeability testing device provided by the present application can allow the test liquid to be added to the test tube from the second connecting hole, and can also allow the test liquid in the test tube to be discharged from the first connecting hole, which can provide a structural basis for maintaining the liquid level of the test liquid at the lowest point of the first connecting hole, thereby facilitating maintaining the liquid level of the test liquid unchanged, so that the permeability test can be accurately performed.

[0020] In some embodiments, the permeability testing device provided in the present application also includes a liquid circulation component, which includes an inlet end and an outlet end, the inlet end is connected to the first connecting hole, and the outlet end is connected to the second connecting hole. The liquid circulation component is used to allow the test liquid discharged from the test tube to re-enter the test tube.

[0021] In this way, the permeability testing device provided by the present application can recycle the testing liquid.

[0022] In some embodiments, the permeability testing device provided in the present application also includes a cache chamber, which is arranged inside the test tube, the cache chamber is connected to the second connecting hole, and is provided with an overflow port, and the minimum distance between the side of the overflow port and the test sample is greater than or equal to the preset distance.

[0023] In this way, the permeability testing device provided in the present application can buffer the test liquid added to the test tube through the second connecting hole through the buffer chamber, so that the test liquid enters the test tube through the overflow port, thereby preventing the test liquid entering the test tube through the second connecting hole from directly impacting the liquid surface in the test tube, causing the liquid surface height to change, thereby avoiding affecting the test results.

[0024] In some embodiments, the overflow port is disposed on a side wall of the buffer chamber, or the overflow port is disposed at an end of the buffer chamber away from the test sample.

[0025] In this way, when the test tube contains the test liquid, the overflow port is higher than the liquid level of the test liquid in the test tube, thereby preventing the test liquid in the test tube from entering the buffer chamber.

[0026] In some embodiments, the first connecting hole is used to add the test liquid, and the permeability testing device also includes an auxiliary test container and a connecting tube. The cross-sectional area of the auxiliary test container is larger than the cross-sectional area of the connecting tube. The cross-sectional areas of the auxiliary test container and the connecting tube are perpendicular to the length direction of the connecting tube. The side wall of the auxiliary test container is provided with a third connecting hole, and the connecting tube is respectively connected to the first connecting hole and the third connecting hole to connect the auxiliary test container with the connecting tube.

[0027] In this way, when the test liquid seeps out of the test tube, causing the liquid level therein to drop, the test liquid in the auxiliary test container can enter the test tube through the connecting tube. Furthermore, because the cross-sectional area of the test tube is smaller than that of the auxiliary test container, the drop in the liquid level in the auxiliary test container during the test period is minimal, even negligible. This keeps the liquid level in the test tube within a certain range, minimizing the impact on the accuracy of the test results.

[0028] In some embodiments, the cross-sectional area of the auxiliary test container is S1, and the cross-sectional area of the connecting tube is S2, wherein S1 ≥ 5S2.

[0029] In some embodiments, the bottom wall surface of the inner cavity of the auxiliary test container is coplanar with a side surface of the test sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A schematic cross-sectional view of a permeability testing device provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 One of the partial enlarged views at A in the middle;

[0033] Figure 3 A schematic cross-sectional view of another permeability testing device provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of a top view of the test tube provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the structure of the test sample and the sealing member provided in the embodiment of the present application;

[0036] Figure 6 for Figure 1 The second partial enlarged view of point A in the middle;

[0037] Figure 7 A schematic cross-sectional structural diagram of the cache chamber provided in an embodiment of the present application.

[0038] Among them, the reference numerals in the figures are:

[0039] 100-Permeability test device; 1-Test tube; 11-Liquid outlet connector; 12-Liquid inlet connector; 13-Limiting protrusion; 14-Cache chamber; 141-Overflow port; 2-Meter; 21-First liquid storage container; 22-Weighing instrument; 3-Test sample; 4-Seal; 41-First sealing part; 42-Second sealing part; 5-Liquid circulation assembly; 51-Second liquid storage container; 52-Liquid inlet pipe; 53-Third liquid storage container; 54-Liquid outlet pipe; 55-Liquid guide pump; 56-Liquid guide pipe; 6-Auxiliary test container; 7-Connecting pipe. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0044] Porous materials generally offer advantages such as low relative density, high specific strength, high specific surface area, light weight, sound and heat insulation, and good permeability. Porous materials include porous ceramics, porous glass, and porous membranes. They have a wide range of uses, including the atomizer core in atomizers.

[0045] When applying porous materials, it is usually necessary to know various performance indicators, such as permeability. Permeability is a key performance that affects the application of porous materials. Therefore, a permeability testing device is required to perform permeability testing on porous materials.

[0046] Please also refer to Figure 1 and Figure 2 , the permeability testing device 100 provided in the embodiment of the present application is now described. The permeability testing device 100 provided in the embodiment of the present application includes a test tube 1, which is used to place a test sample 3 and contain a test liquid. It can be understood that when the permeability testing device 100 provided in the embodiment of the present application is in use, the test tube 1 can be placed vertically, that is, the length direction of the test tube 1 is consistent with the vertical direction. When the permeability testing device 100 provided in the embodiment of the present application is in use, the test tube 1 can also be placed at an angle. Exemplarily, the length direction of the test tube 1 has an angle with the vertical direction, wherein the angle can be an acute angle less than 45°.

[0047] Optionally, both ends of the test tube 1 in the length direction are open.

[0048] Optionally, the test sample 3 is placed close to the bottom of the test tube 1 .

[0049] For example, the test sample 3 may be made of a porous material. For example, the test sample 3 may be made of porous ceramics. For example, the test sample 3 may be a sheet structure with uniform thickness.

[0050] Exemplarily, the test liquid can be water. Of course, the test liquid can also be other liquid media. For example, the test liquid can be the liquid medium that the test sample 3 contacts when applied.

[0051] The side wall of the test tube 1 is provided with a first communicating hole, and the first communicating hole is used for discharging or adding the test liquid.

[0052] Please continue reading Figure 1 and Figure 2 In some examples, the first communicating hole is used to discharge the test liquid. The test liquid added to the test tube 1 can be discharged through the first communicating hole, which helps maintain the test liquid level at the lowest point of the first communicating hole. In other words, the permeability testing device 100 provided in this application can use the first communicating hole to discharge the test liquid, providing a structural basis for maintaining the test liquid level at the lowest point of the first communicating hole, thereby facilitating the maintenance of a constant test liquid level and enabling accurate permeability testing.

[0053] Optionally, the first communicating hole is used to discharge the test liquid, and the test tube 1 is further provided with a second communicating hole, which is used to add the test liquid to the test tube 1. The minimum distance between the side of the first communicating hole and the test sample 3 is equal to a preset distance, that is, the lowest point of the first communicating hole is at a preset distance from the test sample 3, so that the liquid level of the test liquid is equal to the preset distance.

[0054] In this way, the permeability testing device 100 provided in the present application can allow the test liquid to be added to the test tube 1 from the second connecting hole, and can also allow the test liquid in the test tube 1 to be discharged from the first connecting hole, which can provide a structural basis for maintaining the liquid level of the test liquid at the lowest point of the first connecting hole, thereby facilitating maintaining the liquid level of the test liquid unchanged, so that the permeability test can be accurately performed.

[0055] For example, the second communication port can be an upper opening of the test cylinder. The test liquid in the first liquid storage container 21 can enter the test cylinder through the upper opening of the test tube 1 without opening a hole in the side wall of the test tube 1.

[0056] For example, the second communication port is disposed on the sidewall of the test tube 1, and the minimum distance between the side edge of the second communication port and the test sample 3 is greater than or equal to a predetermined distance. This allows the addition of test liquid to the test tube via the second communication port to prevent turbulence within the test liquid, which could affect test results.

[0057] See also Figure 3 In other examples, the permeability testing device 100 further includes an auxiliary test container 6 and a connecting tube 7. The first connecting hole is used to add the test liquid. A third connecting hole is provided on the side wall of the auxiliary test container 6. The connecting tube 7 is connected to the first and third connecting holes, respectively, to connect the auxiliary test container 6 with the connecting tube 7. The connecting tube 7 is placed horizontally.

[0058] In this example, when the permeability testing device 100 is performing a test, the liquid level in the test tube 1 is flush with the liquid level in the auxiliary test container 6. After the test liquid in the test tube 1 seeps out, causing the liquid level in the test tube 1 to drop, the test liquid in the auxiliary test container 6 can enter the test tube 1 through the connecting tube 7.

[0059] Optionally, the bottom wall of the inner cavity of the auxiliary test container 6 is coplanar with one side surface of the test sample 3. The pressure of the test liquid inside the auxiliary test container 6 is the same as the pressure of the test liquid in the test tube 1.

[0060] Furthermore, the cross-sectional area of the auxiliary test container 6 is larger than that of the connecting tube 7, and the cross-sectional areas of the auxiliary test container 6 and the connecting tube 7 are perpendicular to the length of the connecting tube 7. During the test period, the drop in the liquid level in the auxiliary test container 6 is minimal, even negligible, thereby maintaining the liquid level in the test tube 1 within a certain height range and minimizing the impact on the accuracy of the test results.

[0061] For example, the cross-sectional area of the auxiliary test container 6 is S1, and the cross-sectional area of the connecting tube 7 is S2, wherein S1≥5S2. That is, the cross-sectional area of the auxiliary test container 6 can be 5 times or more of the cross-sectional area of the connecting tube 7.

[0062] Exemplarily, S1=5S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 5 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=10S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 10 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=20S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 20 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=30S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 30 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=40S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 40 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=50S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 50 times the cross-sectional area of the connecting tube 7. Exemplarily, S1=60S2, i.e., the cross-sectional area of the auxiliary test container 6 may be 60 times the cross-sectional area of the connecting tube 7. In this way, when the liquid level in the test tube 1 changes within a certain range, the change in the liquid level in the auxiliary liquid storage container can be ignored, which is beneficial to improving the accuracy of the test results.

[0063] Please continue reading Figure 1 、 Figure 2 and Figure 3 The permeability testing device 100 provided in the embodiment of the present application further includes a meter 2 , which is placed below the test tube 1 and is used to measure the volume or weight of the test liquid that permeates from the test tube 1 .

[0064] For example, the measuring device 2 may include a measuring cup, into which the test liquid seeping from the test sample 3 in the test tube 1 may fall. When performing a test using the permeability testing device 100 provided in an embodiment of the present application, the volume V of the test liquid seeping out within a preset time t may be measured using the measuring cup. The volume flow rate Qv is then calculated based on the volume V and the preset time t, where Qv = V / t. The preset time t may be measured using a stopwatch.

[0065] Exemplarily, the meter 2 may include a weighing instrument 22 and a first liquid storage container 21. The first liquid storage container 21 is placed on the weighing instrument 22, and the test liquid seeping from the test sample 3 in the test tube 1 falls into the first liquid storage container 21. The weighing instrument 22 may be a balance. When the permeability testing device 100 provided in the embodiment of the present application is tested, the mass m of the test liquid seeping out within a preset time t can be measured by the weighing instrument 22, and the volume flow rate Qv can be calculated based on the mass m and the preset time t, where Qv = m / (ρ*t). The preset time t can be measured by a stopwatch, and ρ is the density of the test liquid.

[0066] Through the above-described technical solution, the permeability testing device 100 provided herein can utilize the first communicating hole to discharge or add test liquid, providing a structural foundation for maintaining the test liquid level at the lowest point of the first communicating hole, thereby facilitating a constant test liquid level and enabling accurate permeability testing. Furthermore, the meter 2 can measure the volume or weight of the test liquid that permeates through the test tube 1, thereby calculating the volumetric flow rate and thereby enabling the calculation of the permeability test results.

[0067] It can be understood that the permeability of test sample 3 is K, and the calculation formula of K is:

[0068] K = -(u*μ*L) / ΔP. Here, u = Qv / S, ΔP = ρgh, Qv is the volume flow rate, S is the cross-sectional area of test sample 3, μ is the viscosity of the test liquid, L is the thickness of test sample 3, ρ is the density of the test liquid, g is the acceleration due to gravity, and h is the liquid level. The viscosity μ and density ρ of the test liquid can be determined based on the type of test liquid, and the cross-sectional area S and thickness L of test sample 3 can be obtained by measuring the test sample 3.

[0069] Therefore, the permeability testing device 100 provided in the present application can perform permeability testing.

[0070] Please also refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In some embodiments, a protruding limiting protrusion 13 is provided on the inner side of the test tube 1 . The limiting protrusion 13 is used to carry the test sample 3 . The limiting protrusion 13 and the first communicating hole are spaced apart along the length direction of the test tube 1 .

[0071] In this way, the limiting protrusion 13 can carry the test sample 3 and position the test sample 3 so that the test sample 3 is stably placed in the test tube 1, thereby facilitating improving the accuracy of the test result.

[0072] In some embodiments, the limiting protrusion 13 extends along the side of the test tube 1, and the extending direction of the limiting protrusion 13 is perpendicular to the length of the test tube 1. For example, the limiting protrusion 13 can extend at least half a circle around the axis of the test tube 1. For example, the limiting protrusion 13 can extend a full circle around the axis of the test tube 1, that is, the limiting protrusion 13 can be annular.

[0073] In some embodiments, there may be multiple limiting protrusions 13, which are spaced apart along the side of the test tube 1, and the spacing direction of the multiple limiting protrusions 13 is perpendicular to the length direction of the test tube 1. That is, the multiple limiting protrusions 13 are spaced apart around the axis of the test tube 1.

[0074] In this way, the limiting protrusion 13 provides better support for the test sample 3 , which is beneficial to improving the stability of the test sample 3 .

[0075] Please also refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 In some embodiments, the permeability testing device 100 provided in the embodiment of the present application further includes a seal 4 , which is annular and is at least used to be sleeved on the circumference of the test sample 3 .

[0076] In this way, the sealing member 4 can prevent the test liquid from leaking from the gap between the test sample 3 and the inner wall surface of the test cylinder.

[0077] Optionally, the seal 4 includes a first sealing portion 41 and a second sealing portion 42 connected to each other, the first sealing portion 41 is annular and is sleeved on the circumference of the test sample 3, and the second sealing portion is annular and is arranged at the bottom of the test sample 3.

[0078] In this way, the sealing member 4 can double-seal the gap between the test sample 3 and the inner wall surface of the test cylinder, thereby further preventing the test liquid from leaking from the gap between the test sample 3 and the inner wall surface of the test cylinder.

[0079] For example, the first sealing portion 41 is integrally connected to the second sealing portion 42. In this way, the sealing member 4 is easy to manufacture and has better sealing performance.

[0080] Please also refer to Figure 1 、 Figure 6 and Figure 7 In some embodiments, the permeability testing device 100 provided in the present application further includes a buffer chamber 14, which is arranged inside the test tube 1. The buffer chamber 14 is connected to the second connecting hole and is provided with an overflow port 141. The minimum distance between the side of the overflow port 141 and the test sample 3 is greater than or equal to the preset distance.

[0081] In this way, the permeability testing device 100 provided in the present application can buffer the test liquid added to the test tube 1 through the second connecting hole through the buffer chamber 14, so that the test liquid enters the test tube 1 through the overflow port 141, thereby preventing the test liquid entering the test tube 1 through the second connecting hole from directly impacting the liquid surface in the test tube 1, causing the liquid surface height to change, thereby avoiding affecting the test results.

[0082] Exemplarily, the overflow port 141 is provided on a side wall of the buffer chamber 14 .

[0083] Exemplarily, the overflow port 141 is disposed at an end of the buffer chamber 14 away from the test sample 3 .

[0084] In this way, when the test tube 1 contains the test liquid, the overflow port 141 is higher than the liquid level of the test liquid in the test tube 1 , thereby preventing the test liquid in the test tube 1 from entering the buffer chamber 14 .

[0085] Please continue reading Figure 1 and Figure 2 In some embodiments, the permeability testing device 100 provided herein further includes a liquid circulation assembly 5. The liquid circulation assembly 5 includes an inlet and an outlet. The inlet is connected to the first communication hole, and the outlet is connected to the second communication hole. The liquid circulation assembly 5 is used to allow the test liquid discharged from the test tube 1 to re-enter the test tube 1. In this way, the permeability testing device 100 provided herein can recycle the test liquid.

[0086] Exemplarily, the test tube 1 includes a liquid inlet connector 12 and a liquid outlet connector 11. The liquid inlet connector 12 is fixed to the second communication hole and communicates with the interior of the test tube 1. The liquid outlet connector 11 is fixed to the first communication hole and communicates with the interior of the test tube 1. The inlet end of the liquid circulation component 5 is connected to the first communication hole via the liquid outlet connector 11, and the outlet end of the liquid circulation component 5 is connected to the second communication hole via the liquid inlet connector 12.

[0087] In some embodiments, the liquid circulation component 5 includes a second liquid storage container 51 , a liquid inlet pipe 52 , a third liquid storage container 53 , a liquid outlet pipe 54 , a liquid guide pump 55 and a liquid guide pipe 56 .

[0088] Among them, the second liquid storage container 51 is higher than the test tube 1, and the second liquid storage container 51 can store the test liquid. The second liquid storage container 51 is connected to the liquid inlet connector 12 through the liquid inlet pipe 52, that is, the outlet end of the liquid circulation component 5 is set at the liquid inlet pipe 52, and the test liquid in the second liquid storage container 51 can enter the test cylinder through the liquid inlet pipe 52.

[0089] The third liquid storage container 53 is lower than the test tube 1 . The test liquid in the test tube 1 can enter the third liquid storage container 53 through the liquid outlet pipe 54 . The third liquid storage container 53 can store the test liquid discharged from the test tube 1 to prevent the test liquid from being discharged at will.

[0090] The liquid pump 55 is disposed on a liquid conduit 56. One end of the liquid conduit 56 is connected to the second liquid storage container 51, and the other end of the liquid conduit 56 is connected to the third liquid storage container 53. The permeability testing device 100 provided in this embodiment of the application can use the liquid pump 55 and the liquid conduit 56 to draw the test liquid from the third liquid storage container 53 into the second liquid storage container 51, thereby recycling the test liquid.

[0091] Furthermore, the upper end of the third liquid storage container 53 is open, and a liquid outlet tube 54 extends through the upper end opening of the third liquid storage container 53 into the second liquid storage container 51. The upper end opening of the third liquid storage container 53 is larger than the size of the liquid outlet tube 54, and the upper end opening of the third liquid storage container 53 is connected to the atmosphere. The test liquid in the test tube 1 enters the third liquid storage container 53 through the liquid outlet tube 54, preventing the liquid pump 55 from directly aspirating the test liquid in the test tube 1 through the liquid outlet tube 54, thereby preventing the negative pressure generated by the liquid pump 55 from affecting the test liquid in the test tube 1.

[0092] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A permeability testing device, characterized in that: include: A test tube, the test tube is used to place a test sample and contain a test liquid, and a first communication hole is provided on the side wall of the test tube, the first communication hole is used to discharge or add the test liquid; The meter is placed under the test tube and is used to measure the volume or weight of the test liquid that permeates from the test tube.

2. The permeability testing device according to claim 1, wherein: The inner side surface of the test tube is provided with a protruding limiting protrusion, the limiting protrusion is used to carry the test sample, and the limiting protrusion and the first communicating hole are spaced apart along the length direction of the test tube.

3. The permeability testing device according to claim 2, wherein: The limiting protrusion extends along the side of the test tube, and the extending direction of the limiting protrusion is perpendicular to the length direction of the test tube; Alternatively, there are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the side of the test tube, and the spacing direction of the multiple limiting protrusions is perpendicular to the length direction of the test tube.

4. The permeability testing device according to claim 1, wherein: The permeability testing device further includes a sealing member, which is annular and is at least used for being sleeved on the circumference of the test sample.

5. The permeability testing device according to any one of claims 1 to 4, characterized in that: The first communicating hole is used to discharge the test liquid. The side wall of the test tube is further provided with a second communicating hole, and the second communicating hole is used to add the test liquid into the test tube. The minimum distance between the side of the first communicating hole and the test sample is equal to a preset distance, and the minimum distance between the side of the second communicating hole and the test sample is greater than or equal to the preset distance.

6. The permeability testing device according to claim 5, characterized in that: The permeability testing device also includes a liquid circulation component, which includes an inlet end and an outlet end. The inlet end is connected to the first connecting hole, and the outlet end is connected to the second connecting hole. The liquid circulation component is used to allow the test liquid discharged from the test tube to re-enter the test tube.

7. The permeability testing device according to claim 5, wherein: The permeability testing device also includes a buffer chamber, which is arranged inside the test tube. The buffer chamber is connected to the second connecting hole and is provided with an overflow port. The minimum distance between the side of the overflow port and the test sample is greater than or equal to the preset distance.

8. The permeability testing device according to claim 7, wherein: The overflow port is arranged on a side wall of the buffer chamber, or the overflow port is arranged at an end of the buffer chamber away from the test sample.

9. The permeability testing device according to any one of claims 1 to 4, characterized in that: The first communicating hole is used for adding a test liquid. The permeability testing device further includes an auxiliary testing container and a connecting tube. The cross-sectional area of the auxiliary testing container is larger than that of the connecting tube. The cross-sectional areas of the auxiliary testing container and the connecting tube are perpendicular to the length direction of the connecting tube. A third communicating hole is provided on the side wall of the auxiliary testing container. The connecting tube is respectively connected to the first communicating hole and the third communicating hole to connect the auxiliary testing container with the connecting tube.

10. The permeability testing device according to claim 9, wherein: The cross-sectional area of the auxiliary test container is S1, and the cross-sectional area of the connecting pipe is S2, wherein S1≥5S2.

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