Sample support device and system for gas permeation testing

Abstract

This invention discloses a sample carrier device and system for gas permeability testing. The sample carrier device includes a first pipe, a second pipe, and a sample carrier tube. Both ends of the sample carrier tube are airtightly connected to the first pipe and the second pipe, respectively. The sample carrier tube can switch between a first mode and a second mode. The sample carrier tube is used to carry the sample to be tested. When the sample carrier tube is in the first mode, its inner diameter is greater than or equal to the outer diameter of the sample to be tested. When the sample carrier tube is in the second mode, its inner wall is airtightly connected to the sample to be tested. By measuring the gas permeability of the sample by airtightly connecting both ends of the sample carrier tube to the first and second pipes, the sample carrier tube can be destroyed and the sample removed after the measurement, preventing damage to the sample during removal and improving the reusability of the sample.

Description

Technical Field

[0001] This invention relates to the field of gas permeability measurement, and more particularly to a sample carrier device and system for gas permeability testing. Background Technology

[0002] Porous solid media possess advantages such as high porosity, low thermal conductivity, large specific surface area, and low density, making them widely used in applications such as thermal insulation, catalysis, sound insulation, and energy storage. One of the important indicators for evaluating the properties of porous solid media is their gas permeability. Currently, when measuring the gas permeability of porous solid media samples, refer to... Figure 1 The sample carrier device typically uses sealant in the adhesive tank 11 to fix the sample to be tested onto the sample tray 12 to ensure a seal. However, this can lead to damage to the sample during removal from the sample tray 12. Therefore, the sample carrier device for gas permeation testing still needs improvement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that when measuring the gas permeability of porous solid media samples, the sample carrier device usually uses sealant in the glue tank to fix the sample to be tested on the sample carrier plate to make it seal, which will lead to the sample being damaged when it is removed from the sample carrier plate. The present invention provides a sample carrier device and system for gas permeability testing.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, a sample carrier device for gas permeation testing is provided, the sample carrier device comprising: a first pipe, a second pipe, and a sample carrier tube;

[0006] The sample carrier tube is airtightly connected to the first pipe and the second pipe at both ends; the sample carrier tube can switch between a first form and a second form; the sample carrier tube is used to carry the sample to be tested;

[0007] When the sample carrier tube is in the first configuration, the inner diameter of the sample carrier tube is greater than or equal to the outer diameter of the sample to be tested.

[0008] When the sample carrier tube is in the second configuration, the inner wall of the sample carrier tube is airtightly connected to the sample to be tested.

[0009] Optionally, the inner wall of the sample carrier tube is airtightly connected to the sample to be tested by a sealant.

[0010] Optionally, when the sample carrier tube is in the second configuration, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested.

[0011] Optionally, the sample carrier tube is transparent in the second configuration.

[0012] Optionally, in the first configuration, the shrinkage ratio of the sample carrier tube is 1.5:1 to 4:1.

[0013] Optionally, in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm.

[0014] Optionally, in the second configuration, the longitudinal shrinkage rate of the sample carrier tube is less than 1%.

[0015] Optionally, the materials of the first pipe and the second pipe include at least one of copper, stainless steel, aluminum alloy, polytetrafluoroethylene, and fiberglass.

[0016] Optionally, the first conduit is detachably connected to the sample carrier tube;

[0017] And / or, the second conduit is detachably connected to the sample carrier tube.

[0018] Optionally, a system for gas permeation testing is provided, the system including the sample carrier device for gas permeation testing as described in any of the above claims.

[0019] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0020] The positive and progressive effects of this invention are as follows: by measuring the gas permeability of the sample under test by connecting the two ends of the sample carrier tube to the first pipe and the second pipe respectively in an airtight manner, the sample carrier tube can be destroyed and the sample under test can be removed after the measurement is completed, so that the sample under test is not damaged during the removal process, thereby improving the reusability of the sample under test. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a sample carrier device for gas permeation testing in the prior art is provided for an exemplary embodiment of the present invention.

[0022] Figure 2 A schematic diagram of the structure of a sample carrier device for gas permeation testing provided as an exemplary embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a gas permeation testing measurement system provided as an exemplary embodiment of the present invention;

[0024] Figure 4 A partial measurement data diagram of a gas permeation test measurement system provided as an exemplary embodiment of the present invention.

[0025] Figure 5A schematic diagram of a gas supply device for a gas permeation testing measurement system provided as an exemplary embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a general measuring device for a gas permeation testing measurement system provided as an exemplary embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the exhaust gas treatment device of a gas permeation testing measurement system provided as an exemplary embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the control device of a gas permeation testing measurement system provided as an exemplary embodiment of the present invention; Detailed Implementation

[0029] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0030] Example 1

[0031] Figure 2 This is a schematic diagram of a sample carrier device for gas permeation testing provided in an exemplary embodiment of the present invention. The sample carrier device includes a first pipe 21, a second pipe 23, and a sample carrier tube 22. Both ends of the sample carrier tube 22 are airtightly connected to the first pipe 21 and the second pipe 23, respectively.

[0032] Preferably, the two ends of the sample carrier tube 22 are respectively fitted onto the first pipe 21 and the second pipe 23 to form a sample holding space, the length of which is equal to the length of the sample 24. The two ends of the sample carrier tube 22 are each at least 50 mm long and are attached to the first pipe 21 and the second pipe 23, which not only fixes the sample 24 but also prevents gas leakage during measurement, thus avoiding inaccurate measurement results. The material of the sample 24 includes, but is not limited to, porous solid media, irradiated materials, and highly radioactive materials.

[0033] Preferably, the dimensions of the first pipe 21, the sample carrier pipe 22, and the second pipe 23 are adjusted according to the size of the sample to be tested, making the measurement of the sample carrier device more flexible and efficient.

[0034] The sample carrier tube 22 switches between a first configuration and a second configuration. The sample carrier tube 22 is used to hold the sample to be tested. In the first configuration, the inner diameter of the sample carrier tube 22 is greater than or equal to the outer diameter of the sample to be tested, allowing the sample carrier tube 22 to completely accommodate the sample, facilitating its placement. In the second configuration, the inner wall of the sample carrier tube 22 is airtightly connected to the sample to be tested, preventing gas leakage and maintaining stable gas pressure during the test, thereby enabling a more accurate measurement of the gas permeability of the sample.

[0035] The sample carrier tube 22 is made of materials including, but not limited to, heat-shrink tubing and cold-shrink tubing, which allows it to maintain a sealed connection with the sample under a gas pressure of 0.8 MPa and / or a gas temperature of 90°C. Furthermore, due to the low cost of the sample carrier tube 22, it can be directly destroyed and the sample removed after measurement, preventing damage to the sample during removal and improving the reusability of the sample.

[0036] In this embodiment, the sample carrier tube 22, the first pipe 21, and the second pipe 23 in the sample carrier device are easily detachable. The first pipe 21, the second pipe 23, and the sample carrier tube 22 can be selected to match the size of the sample 24 to be tested, thus enabling gas permeability testing of samples 24 of different sizes. Furthermore, when the sample carrier tube 22 in the sample carrier device carries the sample 24 to be tested, the first pipe 21 and the second pipe 23 can fix the sample 24 to be tested within the sample carrier tube 22. This ensures that gas only passes through the sample 24 during gas permeability testing, resulting in a more accurate measurement of the gas permeability of the sample 24.

[0037] In one embodiment, the inner wall of the sample carrier tube is airtightly connected to the sample under test using sealant. This ensures that the sample carrier tube remains sealed to the sample during gas measurement, improving the accuracy of gas permeability measurement.

[0038] In one embodiment, when the sample carrier tube is in the second form, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested, so that the sample carrier tube can completely wrap the sample to be tested and completely seal the sample to be tested.

[0039] In one embodiment, the sample carrier tube is transparent in the second configuration. For sample carrier tubes with heat-shrinkable properties, a hot air gun can be used to heat the sample carrier tube containing the sample to be tested before testing. The sample carrier tube shrinks due to heat, transforming from the first configuration to the second configuration. After shrinkage, the transparent sample carrier tube makes it easier to observe the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal is intact, and a gas permeation test can be performed on the sample to be tested.

[0040] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1, which allows the sample carrier tube to seal the sample to be tested better and faster.

[0041] In one embodiment, in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm. This ensures that the sample under test within the sample carrier tube will not rupture under high pressure.

[0042] In one embodiment, the longitudinal shrinkage rate of the sample carrier tube in the second form is less than 1%, which allows for a better sealing connection between both ends of the sample carrier tube and the sample to be tested.

[0043] In one embodiment, the first and second pipes are made of at least one of copper, stainless steel, aluminum alloy, polytetrafluoroethylene, and fiberglass. These materials have sealing properties, safety, and corrosion resistance, which can make gas permeability measurement more accurate, safe, and stable.

[0044] In one embodiment, the first conduit and the sample carrier tube are detachably connected, which makes it easier to change the size of the first conduit and the sample carrier tube.

[0045] In one embodiment, the second pipe is detachably connected to the sample carrier tube, which allows for easier replacement of the size of the second pipe and the sample carrier tube.

[0046] In one embodiment, the first conduit and the sample carrier tube are detachably connected, and the second conduit and the sample carrier tube are also detachably connected. This allows for easier replacement of the dimensions of the first conduit, the second conduit, and the sample carrier tube.

[0047] In one embodiment, the shrinkage ratio of the sample carrier tube in the first state is 1.5:1 to 4:1, and the total wall thickness of the sample carrier tube in the second state is greater than or equal to 1 mm; this allows the sample carrier tube to seal the sample to be tested better and faster, and ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure.

[0048] In one embodiment, the shrinkage ratio of the sample carrier tube in the first form is 1.5:1 to 4:1, and the longitudinal shrinkage rate of the sample carrier tube in the second form is less than 1%; this allows the sample carrier tube to better and faster seal the sample to be tested and to better seal the two ends of the sample carrier tube with the sample to be tested.

[0049] In one embodiment, the shrinkage ratio of the sample carrier tube in the first state is 1.5:1 to 4:1, and the inner diameter of the sample carrier tube in the second state is equal to the outer diameter of the sample to be tested; this allows the sample carrier tube to seal the sample to be tested better and faster, and to completely wrap the sample to be tested with the sample carrier tube, thus completely sealing and connecting the sample to be tested.

[0050] In one embodiment, the sample carrier tube has a shrinkage ratio of 1.5:1 to 4:1 in the first state and is transparent in the second state. This allows the sample carrier tube to seal the sample to be tested better and faster, and makes it easier to observe the seal between the sample carrier tube and the sample. If there are no air bubbles between the sample carrier tube and the sample, the seal between the sample carrier tube and the sample is intact, and gas permeation testing can be performed on the sample.

[0051] In one embodiment, in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm and the longitudinal shrinkage rate is less than 1%; this ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure and allows for better sealing connection between the two ends of the sample carrier tube and the sample to be tested.

[0052] In one embodiment, in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested; this ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure and that the sample carrier tube can completely enclose the sample to be tested, thus completely sealing and connecting the sample to be tested.

[0053] In one embodiment, the sample carrier tube, in its second configuration, has a total wall thickness greater than or equal to 1 mm and is transparent. This ensures that the sample under test within the sample carrier tube will not rupture under high pressure and allows for easier observation of the seal between the sample carrier tube and the sample. If there are no air bubbles between the sample carrier tube and the sample, the seal between them is intact, and a gas permeation test can be performed on the sample.

[0054] In one embodiment, in the second form, the longitudinal shrinkage rate of the sample carrier tube is less than 1% and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested; this allows for better sealing connection between both ends of the sample carrier tube and the sample to be tested, and allows the sample carrier tube to completely enclose the sample to be tested, thus ensuring a complete sealing connection between the sample carrier tube and the sample to be tested.

[0055] In one embodiment, the sample carrier tube, in its second form, has a longitudinal shrinkage rate of less than 1% and is transparent. This allows for better sealing between both ends of the sample carrier tube and the sample to be tested, and makes it easier to observe the seal between the sample carrier tube and the sample. If there are no air bubbles between the sample carrier tube and the sample, the seal between them is intact, and a gas permeation test can be performed on the sample.

[0056] In one embodiment, when the sample carrier tube is in the second configuration, its inner diameter is equal to the outer diameter of the sample to be tested, and it is transparent. This allows the sample carrier tube to completely enclose the sample, ensuring a complete seal and facilitating observation of the seal between the sample carrier tube and the sample. If no air bubbles are present between the sample carrier tube and the sample, the seal is intact, and a gas permeation test can be performed on the sample.

[0057] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm and the longitudinal shrinkage rate is less than 1%. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, and provides a better sealing connection between the two ends of the sample carrier tube and the sample to be tested.

[0058] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested. This allows the sample carrier tube to better and faster seal the sample to be tested, to completely enclose the sample to be tested, and to completely seal and connect the sample to the sample.

[0059] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness is greater than or equal to 1 mm and the sample carrier tube is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, and makes it easier to observe the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0060] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the longitudinal shrinkage rate is less than 1%, and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested. This allows the sample carrier tube to seal the sample to be tested better and faster, allows for better sealing and connection between both ends of the sample carrier tube and the sample to be tested, and allows the sample carrier tube to completely enclose the sample to be tested, thus ensuring a complete sealing connection.

[0061] In one embodiment, the shrinkage ratio of the sample carrier tube in its first form is 1.5:1 to 4:1; in its second form, the longitudinal shrinkage rate is less than 1% and it is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures a better seal between both ends of the sample carrier tube and the sample to be tested, and makes it easier to observe the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0062] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested and it is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, completely encapsulate the sample, ensure a complete seal, and facilitate observation of the seal between the sample carrier tube and the sample. If there are no air bubbles between the sample carrier tube and the sample, the seal is intact, and gas permeation testing can be performed on the sample.

[0063] In one embodiment, in the second configuration, the sample carrier tube has a total wall thickness greater than or equal to 1 mm, a longitudinal shrinkage rate less than 1%, and an inner diameter equal to the outer diameter of the sample to be tested. This ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows for better sealing connection between the two ends of the sample carrier tube and the sample to be tested, and ensures that the sample carrier tube completely encloses the sample to be tested, thus achieving a complete sealing connection.

[0064] In one embodiment, in the second configuration, the sample carrier tube has a total wall thickness greater than or equal to 1 mm, a longitudinal shrinkage rate of less than 1%, and is transparent. This ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows for better sealing between the two ends of the sample carrier tube and the sample to be tested, and facilitates easier observation of the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0065] In one embodiment, in the second configuration, the sample carrier tube has a total wall thickness greater than or equal to 1 mm, an inner diameter equal to the outer diameter of the sample to be tested, and is transparent. This ensures that the sample to be tested within the sample carrier tube will not rupture under high pressure, allows the sample carrier tube to completely enclose the sample to be tested, ensures a complete seal between the sample carrier tube and the sample to be tested, and facilitates observation of the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0066] In one embodiment, in the second configuration, the sample carrier tube has a longitudinal shrinkage rate of less than 1%, an inner diameter equal to the outer diameter of the sample to be tested, and is transparent. This allows for better sealing between both ends of the sample carrier tube and the sample to be tested, ensures the sample carrier tube completely encloses the sample, and facilitates easier observation of the seal between the sample carrier tube and the sample. If there are no air bubbles between the sample carrier tube and the sample, the seal is intact, and gas permeation testing can be performed on the sample.

[0067] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness is greater than or equal to 1 mm, the longitudinal shrinkage rate is less than 1%, and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows for better sealing connection between both ends of the sample carrier tube and the sample to be tested, and allows the sample carrier tube to completely enclose the sample to be tested, thus ensuring a complete sealing connection.

[0068] In one embodiment, the shrinkage ratio of the sample carrier tube in the first form is 1.5:1 to 4:1; in the second form, the total wall thickness is greater than or equal to 1 mm, the longitudinal shrinkage rate is less than 1%, and it is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows for better sealing connection between both ends of the sample carrier tube and the sample to be tested, and makes it easier to observe the sealing performance between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the sealing performance between the sample carrier tube and the sample to be tested is good, and gas permeation testing can be performed on the sample to be tested.

[0069] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness of the sample carrier tube is greater than or equal to 1 mm, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested, and it is transparent, which allows the sample carrier tube to seal the sample to be tested better and faster. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows the sample carrier tube to completely enclose the sample to be tested, ensuring a complete seal, and makes it easier to observe the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0070] In one embodiment, the shrinkage ratio of the sample carrier tube in its first form is 1.5:1 to 4:1; in its second form, the longitudinal shrinkage rate is less than 1%, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested, and it is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, allows for better sealing connection between both ends of the sample carrier tube and the sample to be tested, allows the sample carrier tube to completely enclose the sample to be tested, and allows for easier observation of the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0071] In one embodiment, in the second configuration, the sample carrier tube has a total wall thickness greater than or equal to 1 mm, a longitudinal shrinkage rate of less than 1%, an inner diameter equal to the outer diameter of the sample to be tested, and is transparent. This ensures that the sample to be tested within the sample carrier tube will not rupture under high pressure, allows for better sealing between both ends of the sample carrier tube and the sample to be tested, ensures the sample carrier tube completely encloses the sample to be tested, and facilitates easier observation of the seal between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the seal between the sample carrier tube and the sample to be tested is intact, and gas permeation testing can be performed on the sample to be tested.

[0072] In one embodiment, the shrinkage ratio of the sample carrier tube in the first configuration is 1.5:1 to 4:1; in the second configuration, the total wall thickness is greater than or equal to 1 mm, the longitudinal shrinkage rate is less than 1%, and the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested, and it is transparent. This allows the sample carrier tube to seal the sample to be tested better and faster, ensures that the sample to be tested in the sample carrier tube will not rupture under high pressure, allows for better sealing connection between both ends of the sample carrier tube and the sample to be tested, allows the sample carrier tube to completely wrap around the sample to be tested, and makes it easier to observe the sealing performance between the sample carrier tube and the sample to be tested. If there are no air bubbles between the sample carrier tube and the sample to be tested, the sealing performance between the sample carrier tube and the sample to be tested is good, and gas permeation testing can be performed on the sample to be tested.

[0073] Example 2

[0074] This invention provides a measurement system for gas permeation testing, the system including a sample carrier device for any of the gas permeation tests in Embodiment 1. Figure 3 This is a schematic diagram of a gas permeation test measurement system provided as an exemplary embodiment of the present invention; the gas permeation test measurement system includes a gas supply device 31, a mass flow meter 32, a sample carrier device, a first pressure gauge 33, a second pressure gauge 34, and a control device.

[0075] The sample carrier device includes a first pipe 21, a second pipe 23, and a sample carrier tube 22; both ends of the sample carrier tube are airtightly connected to the first pipe 21 and the second pipe 23, respectively; the sample carrier tube 22 is used to carry the sample 24 to be tested; the sample carrier tube 22 switches between a first mode and a second mode; when the sample carrier tube 22 is in the first mode, the inner diameter of the sample carrier tube 22 is greater than or equal to the outer diameter of the sample 24 to be tested; when the sample carrier tube 22 is in the second mode, the inner wall surface of the sample carrier tube 22 is airtightly connected to the sample 24 to be tested.

[0076] The gas supply device 31 is connected to the first pipeline 21 through a pipeline; a second pressure gauge 32 and a first pressure gauge 33 are provided on the pipeline; the second pressure gauge 34 is located at the gas outlet of the second pipeline 23; the control device is electrically connected to the gas supply device 31, the second pressure gauge 32, the first pressure gauge 33 and the second pressure gauge 34 respectively.

[0077] The gas supply device 31 is used to supply gas to the sample carrier. The gas supply device 31 can provide gas at a specified temperature and pressure to the sample carrier, making the testing environment of the sample carrier more diverse.

[0078] The second pressure gauge 32 is used to measure the gas mass flow rate in the pipeline and send the gas mass flow rate to the control device. The second pressure gauge 32 can be used to monitor the gas mass flow rate and send it to the control device so that the control device can make timely and accurate adjustments to the gas mass flow rate in the gas permeation test measurement system based on the gas mass flow rate monitored by the second pressure gauge 32.

[0079] The first pressure gauge 33 is used to measure the first gas pressure at the inlet end of the sample carrier device and send the first gas pressure to the control device; the second pressure gauge 34 is used to measure the second gas pressure at the outlet end of the sample carrier device and send the second gas pressure to the control device.

[0080] The first pressure gauge 33 and the second pressure gauge 34 in the measurement system can respectively measure the gas pressure at the inlet and outlet of the sample carrier device and send this data to the control device. Furthermore, the airtightness of the measurement system can be detected by the first pressure gauge 33 and the second pressure gauge 34. When the pressure difference measured by the first pressure gauge 33 and the second pressure gauge 34 is less than or equal to a pressure threshold, the measurement system has good airtightness and can be used to measure the gas permeability of the sample 24. When the pressure difference measured by the first pressure gauge 33 and the second pressure gauge 34 is greater than the pressure threshold, the measurement system has poor airtightness and cannot be used to measure the gas permeability of the sample 24. The pressure threshold can be set according to experimental requirements or the pressure value that the gas supply device can withstand.

[0081] The control device is used to determine the gas permeability of the sample to be tested based on the gas mass flow rate, the first gas pressure, and the second gas pressure, which makes the calculated gas permeability more accurate.

[0082] The gas permeability testing measurement system provided in this embodiment ensures the integrity of the entire system, thereby achieving accurate and effective measurement of the gas permeability of the sample under test. This system not only prevents damage to the sample during disassembly, improving sample utilization and saving costs, but also facilitates easy installation and disassembly, increasing measurement efficiency. Furthermore, the simplified design of the components allows for convenient and accurate measurement of the permeability of samples of different sizes under various gases. The system can be assembled under different measurement environments based on the sample 24 to meet diverse gas permeability requirements. Since the sample 24 is typically expensive and difficult to obtain, the design of the sample carrier tube 22 allows for measurement of samples of different sizes without damaging the sample, providing an effective and convenient solution for gas permeability measurement of the sample 24.

[0083] In this embodiment, the gas supply device 31 can supply gas through a compressed gas box, gas cylinder, etc., and the gas type can be compressed air, helium, etc. The gas supply system in the gas supply device 31 can be installed in different locations depending on the test environment.

[0084] In one embodiment, the gas permeation test measurement system further includes a heating device. A sample carrier is located within the heating device, which heats the sample carrier to maintain the sample at the target temperature during measurement. The heating device can be implemented, but is not limited to, a hot chamber or a digital display heating box. Taking the measurement of highly radioactive materials in a hot chamber as an example, the gas supply device 21 can be connected through an external gas channel of the hot chamber; the second pressure gauge 32 can also be installed in different positions according to the measurement environment. When measuring highly radioactive materials in a hot chamber, the second pressure gauge 32 can be placed outside the hot chamber for easy reading.

[0085] In one embodiment, the gas permeation test measurement system further includes an exhaust gas treatment device; the exhaust gas treatment device is airtightly connected to the gas supply device; the exhaust gas treatment device is used to treat the gas discharged from the gas supply device through a pressure relief valve.

[0086] In this embodiment, a gas treatment module is installed in the exhaust gas treatment device. This module treats the exhaust gas using methods including, but not limited to, activated carbon adsorption and chemical reaction with a corresponding catalyst. This gas treatment module can purify the gas discharged from the gas supply device through the pressure relief valve, preventing harmful substances contained in the discharged gas from leaking into the air.

[0087] In one embodiment, the gas permeation test measurement system further includes an exhaust gas treatment device; the exhaust gas treatment device is airtightly connected to the second pipeline and is used to treat the gas discharged from the second pipeline.

[0088] In this embodiment, a gas treatment module is installed in the exhaust gas treatment device. This module treats the exhaust gas using methods including, but not limited to, activated carbon adsorption and chemical reaction with a corresponding catalyst. This gas treatment module can purify the gas discharged from the gas supply device through the pressure relief valve, preventing harmful substances contained in the discharged gas from leaking into the air.

[0089] In one embodiment, the gas permeation test measurement system further includes an exhaust gas treatment device; the exhaust gas treatment device is airtightly connected to the gas supply device and the second pipeline respectively; the exhaust gas treatment device is used to treat the gas discharged by the gas supply device through the pressure relief valve and the second pipeline.

[0090] In this embodiment, the exhaust gas treatment device can simultaneously purify the gas discharged from the gas supply device through the pressure relief valve and the gas discharged through the sample to be tested. The gas treatment module installed in the exhaust gas treatment device treats the exhaust gas in ways including, but not limited to, activated carbon adsorption and chemical reaction with a corresponding catalyst. This gas treatment module can purify the gas discharged from the gas supply device through the pressure relief valve, preventing harmful substances contained in the discharged gas from leaking into the air.

[0091] In one embodiment, the gas permeation test measurement system further includes a pressure relief valve installed on the pipeline, which is electrically connected to the control device. When the first gas pressure exceeds a pressure threshold, there is a risk of the pipeline bursting due to excessive pressure. The control device controls the opening and closing of the pressure relief valve to release gas from the gas supply device. When the first gas pressure is less than or equal to the pressure threshold, the pressure in the pipeline is within a safe range, and the control device does not need to control the pressure relief valve to release gas from the gas supply device.

[0092] In this embodiment, the risk of the gas supply device exploding due to excessive pressure can be reduced. The pressure threshold can be set according to experimental requirements or the pressure value that the gas supply device can withstand.

[0093] In one embodiment, when the flow rate difference is less than or equal to the flow rate threshold, the control device calculates the gas permeability of the sample to be tested based on the gas mass flow rate, the first gas pressure, and the second gas pressure; wherein, the flow rate difference is the difference between the gas mass flow rates measured by the mass flow meter at two adjacent times.

[0094] In this embodiment, when the flow rate difference is less than or equal to the flow rate threshold, the gas input of the measurement system characterizing the gas permeability test is in a stable state. Therefore, the gas permeability of the sample is more accurately derived based on the recorded gas mass flow rate, first gas pressure, and second gas pressure at this time. When the flow rate difference is greater than the flow rate threshold, the gas input of the measurement system characterizing the gas permeability test is in an unstable state, and the gas permeability of the sample is inaccurate based on the recorded gas mass flow rate, first gas pressure, and second gas pressure at this time. The flow rate threshold can be set according to specific experimental needs.

[0095] In one embodiment, when the difference between the first gas pressure and the second gas pressure is less than a pressure threshold, the control device calculates the gas permeability of the sample to be tested based on the gas mass flow rate, the first gas pressure, and the second gas pressure.

[0096] In this embodiment, when the pressure difference measured by the first pressure gauge 33 and the second pressure gauge 34 is less than or equal to the pressure threshold, the airtightness of the measurement system is good. Performing a gas permeability test on the sample under test in this condition allows for a more accurate measurement of the gas permeability. Conversely, when the pressure difference measured by the first pressure gauge 33 and the second pressure gauge 34 is greater than the pressure threshold, the airtightness of the measurement system is poor. Performing a gas permeability test on the sample under test in this condition will result in inaccurate gas permeability measurements, and the control device can issue an alarm to prompt the measurement personnel to verify the airtightness. The pressure threshold can be set independently based on experimental requirements or the pressure that the gas supply device can withstand.

[0097] In one embodiment, the control device calculates the gas permeability using the following formula:

[0098]

[0099] Where P1 is the first gas pressure, P2 is the second gas pressure, L is the length of the sample, μ is the gas viscosity, R is the ideal gas constant, T is the gas temperature, K is the linear gas permeability, M is the gas molar mass, A is the cross-sectional area of ​​the sample, G is the gas mass flow rate, and Φ is the nonlinear gas permeability. This formula can be used to measure the linear and nonlinear gas permeability of the sample, allowing for a more comprehensive analysis of changes in the sample's properties.

[0100] In this embodiment, the formula for calculating gas permeability is further transformed into a linear relationship:

[0101]

[0102] Where X is Y is

[0103] K is the linear gas permeability; Φ is the nonlinear gas permeability; where P1 and P2 are the gas pressures at both ends of the sample, L is the sample length, μ is the gas viscosity, R is the ideal gas constant, T is the gas temperature, M is the gas molar mass, A is the sample cross-sectional area, and G is the gas mass flow rate. By substituting the gas mass flow rate and gas pressure measured by the measurement system into this formula, the linear and nonlinear gas permeability of the sample can be obtained.

[0104] Using the measurement system of this embodiment, the test sample is tested multiple times with gases of different mass flow rates, temperatures, and pressures to obtain the gas permeability of the test sample under each test condition.

[0105] like Figure 4As shown, the x-axis is The ordinate Y is The dashed line to the left represents the linear gas permeability of the sample, and the dashed line to the right represents the nonlinear gas permeability of the sample. Where K is the linear gas permeability and Φ is the nonlinear gas permeability; P1 and P2 are the gas pressures at both ends of the sample, L is the length of the sample, μ is the gas viscosity, R is the ideal gas constant, T is the gas temperature, M is the gas molar mass, A is the cross-sectional area of ​​the sample, and G is the gas mass flow rate. During the experiment, the X and Y values ​​are changed by altering the gas mass flow rate, gas temperature, and gas pressure. The gas permeability measurement experiment is stopped when the gas pressure per unit time approaches the maximum pressure threshold. The maximum pressure threshold is determined by the maximum pressure that the sample carrier tube can withstand; preferably, the maximum pressure threshold is 0.8 MPa. The unit time can be set according to experimental requirements. Substituting the X and Y values ​​into formula (2) yields the linear gas permeability and the nonlinear gas permeability of the sample.

[0106] In one embodiment, the gas supply device includes a heating component located within an internal pipe of the gas supply device. The heating component provides gas at a target temperature to the sample carrier. The target temperature can be set as needed, either manually or automatically by a control device. This allows for a more comprehensive measurement of the gas permeability of the sample under test.

[0107] In one embodiment, the gas supply device includes a pressure valve located within an internal pipe of the gas supply device, used to supply gas at different pressures to the sample carrier. The target pressure can be set as needed, either manually or automatically by a control device. This allows for a more comprehensive measurement of the gas permeability of the sample under test.

[0108] In one embodiment, see Figure 5 In addition to the heating component 54 and the pressure valve 53, the gas supply device may also be equipped with at least one of the following components on its internal pipeline: gas source 51, first gas control valve 52, first pressure and temperature sensor 55, high-pressure insulated gas tank 56, second pneumatic control valve 57, pressure relief valve 58, and second pressure and temperature sensor 59.

[0109] Gas source 51 is used to supply gas to the gas permeation test measurement system. Gas source 51 includes, but is not limited to, compressed gas tanks and gas cylinders. The types of gas supplied by gas source 51 include, but are not limited to, compressed air and compressed helium. First pneumatic control valve 52 can control the mass flow rate of gas supplied by gas source 51 to the gas permeation test measurement system, which can prevent excessive pressure in the gas supply device. Pressure valve 53 can control the gas supplied by gas source 51 to the gas permeation test measurement system to reach a specified pressure, so that the gas permeability measurement of the sample under test is more comprehensive. Heating component 54 can heat the gas supplied by gas source 51 to the gas permeation test measurement system to a specified temperature, so that the gas permeability measurement of the sample under test is more comprehensive. First pressure and temperature sensor 55 is used to detect the gas temperature and gas pressure of the input gas in the gas permeation test measurement system, ensuring that the gas temperature and gas pressure of the input gas do not exceed the threshold. The high-pressure insulated gas tank 56 can temporarily store gas at a specified temperature and pressure in the gas permeation test measurement system, making it easier to use gas at the specified temperature and pressure. The second pneumatic control valve 57 controls the mass flow rate of the gas output from the high-pressure insulated gas tank 56, ensuring that the mass flow rate of the gas output from the high-pressure insulated gas tank 56 is the specified gas mass flow rate, which is determined by the gas pressure in the measurement system. The pressure relief valve 58 can release pressure from the gas in the gas supply device 31 and deliver the depressurized gas to the tail gas treatment device. The use of the pressure relief valve 58 includes, but is not limited to, situations where the pressure in the gas supply device 31 exceeds the pressure threshold, operational errors, or sudden accidents. The pressure relief valve 58 can be depressurized by an electric switch controlled by the control device, or it can be depressurized manually. When both electric and manual depressurization are performed simultaneously, manual depressurization takes precedence. The second pressure and temperature sensor 59 is used to detect the gas temperature and gas pressure of the gas output from the gas permeation test measurement system to ensure that the gas temperature and gas pressure supplied to the sample to be tested are the specified gas temperature and gas pressure.

[0110] In this embodiment, the gas supply device can provide various types of gas and different gas supply methods; the gas supply device can also precisely adjust the flow rate, temperature and pressure of the input and output gas; in addition, the gas supply device maintains a stable gas input and a stable gas heating process.

[0111] In one embodiment, the gas permeation test measurement system further includes a heating device, wherein the sample carrier is located within the heating device, and the heating device is used to heat the sample carrier. The heating device includes, but is not limited to, a digital display heating chamber or a hot chamber. This heating device can heat the sample to a specified temperature and maintain it at the operating temperature during measurement, thus ensuring that the temperature of the sample passing through it is the specified temperature.

[0112] In one embodiment, combined Figure 6 The general measuring device in the permeability measurement system is further described below. This general measuring device is used to place the sample to be tested, and its internal pipeline is equipped with, but is not limited to, a second pressure gauge 32, a heating chamber 61, a sample placement device 62, a first pressure gauge 33, and a second pressure gauge 34.

[0113] The second pressure gauge 32 is used to record the gas mass flow rate of the sample to be tested. The first pressure gauge 33 and the second pressure gauge 34 record the pressure at the inlet and outlet of the sample carrying device 62, respectively. The gas permeability of the sample to be tested can be calculated more accurately based on the recorded gas mass flow rate and gas pressure. The heating chamber 61 is used to heat the sample to be tested to a specified temperature and maintain the operating temperature of the sample to be tested during measurement, so that the temperature of the sample passing through it is the specified temperature. The sample carrying device 62 can not only fix the sample to be tested, but also prevent the sample to be tested from being damaged when the system is disassembled.

[0114] The universal measuring device 31 is compatible with sample carriers of various sizes, thus enabling the measurement of gas permeability of samples of different sizes. The universal measuring device 31 can also accurately record the gas mass flow rate through the sample and the gas pressure at the inlet and outlet of the sample carrier, making the gas permeability measurement results more accurate.

[0115] In one embodiment, combined Figure 7 Further explanation of the exhaust gas treatment device:

[0116] The exhaust gas treatment device is used to treat the gas discharged from the gas supply device through the pressure relief valve and the gas discharged from the general measuring device. The exhaust gas treatment device is equipped with, but is not limited to, a first gas detection sensor 71, a first pressure and temperature sensor 45, a gas treatment module 72, a second pressure and temperature sensor 59, and a second gas detection sensor 73 on its internal pipeline.

[0117] The first gas detection sensor 71 and the second gas detection sensor 73 are used to monitor the content of harmful or polluting substances in the exhaust gas before and after treatment, respectively, to ensure that the content of harmful or polluting substances in the gas meets the emission standards. The gas treatment module 72 is used to treat the gas discharged from the gas supply device through the pressure relief valve and the gas discharged from the general measuring device. The gas treatment module treats the exhaust gas by means including but not limited to activated carbon adsorption and chemical reaction with the exhaust gas using a corresponding catalyst, to ensure that the exhaust gas meets the emission standards. The first pressure and temperature sensor 55 and the second pressure and temperature sensor 59 are used to monitor the pressure and temperature of the exhaust gas before and after treatment, respectively. This not only reduces the experimental risks caused by excessive pressure or temperature of the exhaust gas, but also ensures that the exhaust gas meets environmental protection standards.

[0118] In this embodiment, the exhaust gas treatment device can effectively reduce and purify the content of harmful or polluting substances in the gas discharged during the experiment, thereby reducing the risk of harmful or polluting substances in the discharged gas leaking into the air.

[0119] In one embodiment, combined Figure 8 Further explanation of the control device:

[0120] The control device is used to communicate and control various valves and sensors in the gas supply device, general measuring device and exhaust gas treatment device. The control device includes a data transmission module 81, a controller 82 and a communication module 83.

[0121] The data transmission module 81 receives data from the gas supply device, the general measuring device, and the exhaust gas treatment device, providing a better understanding of their operating status. The communication module 83 communicates with the gas supply device, the general measuring device, and the exhaust gas treatment device via methods including, but not limited to, data cables, Wi-Fi, and Bluetooth. This allows for more efficient communication with various valves and sensors. Furthermore, the communication module 83 displays the received real-time data, enabling researchers to better record the data. The controller 82 processes the data transmitted from the gas supply device, the general measuring device, and the exhaust gas treatment device, allowing for more accurate calculation of the gas permeability of the sample.

[0122] In this embodiment, the control device can not only detect the data of each valve and sensor in real time, but also control the entire measurement system in a unified manner, which can make the gas permeability measurement of the sample to be tested more accurate.

[0123] The following describes one measurement method for a gas permeation test measurement system:

[0124] S1, connect the gas supply device, general measuring device, and exhaust gas treatment device through pipelines; then electrically connect the gas supply device, general measuring device, and exhaust gas treatment device to the control device; turn on the power of the entire gas permeation test measurement system, start the control device, send self-test commands to each valve of the gas supply device, and close each valve of the gas supply device after the self-test is fault-free, and connect the gas source.

[0125] S2, by setting the predetermined detection temperature, gas pressure, gas mass flow rate and sample parameters through the control device, the sample carrier device carrying the sample to be tested is installed into the digital display heating chamber, and the air tightness detection program is started.

[0126] The parameters of the sample to be tested include, but are not limited to: the length of the sample to be tested and the cross-sectional area of ​​the sample to be tested.

[0127] In this embodiment, the gas permeability testing system can provide gas permeability measurements for various test samples of different sizes under different temperatures, pressures, and gas media.

[0128] S3. After the air tightness test is completed and the air tightness of the entire measurement system is ensured, the general measuring device is vented and cooled down to ensure that the device returns to normal operating conditions before the gas permeability of the sample to be tested is measured.

[0129] S4 opens all valves in the gas supply device, providing a stable gas supply to the general measuring device. The control device collects and displays data from each sensor in real time, and calculates and displays the real-time gas permeability based on the input sample parameters and gas parameters.

[0130] The parameters of the sample to be tested include, but are not limited to: the length of the sample to be tested and the cross-sectional area of ​​the sample to be tested; the gas parameters include, but are not limited to: gas mass flow rate, gas temperature, and gas pressure.

[0131] S5, after the measurement is completed, the control device controls the gas supply device to cut off the gas input and cools the entire system. Simultaneously, it controls the gas from the general measuring device to be discharged into the exhaust gas treatment module, and also controls the gas from the gas supply device to be input into the exhaust gas treatment module through the vent valve.

[0132] S6. Once the entire system returns to normal operating conditions, the sample to be tested can be removed.

[0133] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A sample carrier for gas permeation testing, characterized by, The sample carrying device includes: a first pipe, a second pipe, and a sample carrying tube; The sample carrier tube is airtightly connected to the first pipe and the second pipe at both ends; the sample carrier tube can switch between a first form and a second form; the sample carrier tube is used to carry the sample to be tested; When the sample carrier tube is in the first configuration, the inner diameter of the sample carrier tube is greater than or equal to the outer diameter of the sample to be tested. When the sample carrier tube is in the second configuration, the inner wall of the sample carrier tube is airtightly connected to the sample to be tested. When the sample carrier tube is in the second configuration, the inner diameter of the sample carrier tube is equal to the outer diameter of the sample to be tested. The sample carrier tube is transparent in the second configuration; When the sample carrier tube is in the first configuration, the shrinkage ratio is 1.5:1 to 4:

1. When the sample carrier tube is in the second configuration, the total wall thickness is greater than or equal to 1 mm; In the second configuration, the longitudinal shrinkage rate of the sample carrier tube is less than 1%.

2. The sample carrying device of claim 1, wherein The inner wall of the sample carrier tube is airtightly connected to the sample to be tested by sealant.

3. The sample carrying device of claim 1, wherein, The materials of the first pipe and the second pipe include at least one of copper, stainless steel, aluminum alloy, polytetrafluoroethylene, and fiberglass.

4. The sample carrier as described in claim 1, characterized in that, The first pipe is detachably connected to the sample carrier pipe; And / or, the second conduit is detachably connected to the sample carrier tube.

5. The sample carrier as described in claim 1, characterized in that, The sample carrier tube has a length of at least 50 mm at each end and is respectively fitted onto the first pipe and the second pipe.

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