Device and method for measuring permeability parameters of pipeline gas

Abstract

The invention relates to the technical field of gas transportation and penetration testing, and discloses a pipeline gas penetration parameter measuring device and method.The device comprises three modules including a flat plate model measuring module used for conducting gas penetration parameter measurement on a test sheet with the specified thickness in the penetration testing process, obtaining mapping relation data between the thickness of the test sheet and the penetration parameters of the flat plate; the pipeline model calculation module is used for performing permeability parameter calculation on the target pipeline model with the target thickness to obtain an initial permeability parameter of the target pipeline model; and the permeability parameter correction module is used for performing matching search in the mapping relation data according to the target thickness to obtain the target flat plate permeability parameter corresponding to the target thickness. Furthermore, the initial permeability parameter is modified by using the target flat plate permeability parameter to obtain the target permeability parameter of the target pipeline model, so that the efficiency and accuracy of pipeline gas permeability parameter measurement are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas transport and permeation testing, and in particular to a device and method for measuring pipeline gas permeation parameters. Background Art

[0002] With the deepening of globalization, energy demand is growing exponentially. In this context, clean and efficient gas energy, such as natural gas and hydrogen, has attracted more and more attention due to its environmental protection characteristics and high efficiency. The storage and transportation of gas energy is a vital link in its industrial chain. Especially for natural gas and hydrogen energy with high permeability, if their performance is not evaluated during the development and design of gas pipelines, it may cause the deterioration of material properties, increase the leakage loss of gas energy, and even cause explosions, seriously affecting the transportation efficiency and safety performance.

[0003] Therefore, clarifying the gas permeability rate and permeability coefficient of the gas pipeline will help evaluate the performance of the pipeline and further ensure the safe operation of the gas pipeline and the stability of energy supply. However, in the relevant technology, the accuracy of the gas permeability parameter measurement method for the gas pipeline needs to be improved. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present application proposes a device and method for measuring pipeline gas permeability parameters. The main technical solutions adopted by the present application include:

[0005] In a first aspect, an embodiment of the present application provides a device for measuring pipeline gas permeability parameters, the device comprising: a flat plate model measurement module, a pipeline model calculation module and a permeability parameter correction module. The flat plate model measurement module is used to perform a permeability test of a target gas on a test sheet of a specified thickness, measure gas permeability parameters during the permeability test, and obtain mapping relationship data between the test sheet thickness and the flat plate permeability parameters; the pipeline model calculation module is used to perform permeability parameter calculation on a target pipeline model of a target thickness to obtain initial permeability parameters of the target pipeline model; the permeability parameter correction module is used to perform a matching search in the mapping relationship data according to the target thickness to obtain a target flat plate permeability parameter corresponding to the target thickness, and modify the initial permeability parameter using the target flat plate permeability parameter to obtain the target permeability parameter of the target pipeline model.

[0006] In a second aspect, an embodiment of the present application provides a method for measuring pipeline gas permeability parameters, the method comprising: performing a permeability test of a target gas on a test sheet of specified thickness, measuring gas permeability parameters during the permeability test, and obtaining mapping relationship data between the test sheet thickness and the flat plate permeability parameters; calculating permeability parameters of a target pipeline model of target thickness to obtain initial permeability parameters of the target pipeline model; matching and searching the mapping relationship data according to the target thickness to obtain target flat plate permeability parameters corresponding to the target thickness; and modifying the initial permeability parameters using the target flat plate permeability parameters to obtain target permeability parameters of the target pipeline model.

[0007] In a third aspect, the present application further provides a computer device including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any of the above methods when executing the computer program.

[0008] In a fourth aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when the computer program is executed by a processor.

[0009] In a fifth aspect, the present invention provides a computer program product, comprising a computer program, which implements the steps of any of the above methods when executed by a processor.

[0010] In the above embodiment, a device and method for measuring pipeline gas permeability parameters are proposed, wherein the device includes three modules: a flat plate model measurement module, which is used to perform a permeability test of a target gas on a test sheet of a specified thickness, measure gas permeability parameters during the permeability test, and obtain mapping relationship data between the test sheet thickness and the flat plate permeability parameters. A pipeline model calculation module, which is used to calculate the permeability parameters of a target pipeline model of a target thickness, and obtain the initial permeability parameters of the target pipeline model. A permeability parameter correction module, which is used to match and search in the mapping relationship data according to the target thickness, obtain the target flat plate permeability parameters corresponding to the target thickness, and modify the initial permeability parameters using the target flat plate permeability parameters to obtain the target permeability parameters of the target pipeline model. Thus, the permeability parameters of pipeline models of the same thickness are corrected using the pre-established mapping relationship data between the test sheet thickness and the flat plate permeability parameters, thereby realizing a device that can improve the efficiency of the gas permeability parameter measurement process and the accuracy of the measurement results of the gas transmission pipeline, and effectively improve the efficiency and accuracy of the pipeline gas permeability parameter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 A structural block diagram of a device for measuring pipeline gas permeability parameters according to an embodiment of the present application;

[0013] Figure 2 A structural block diagram of a flat plate model measurement module provided according to an embodiment of the present application;

[0014] Figure 3 A flow chart of a method for measuring pipeline gas permeability parameters according to an embodiment of the present application;

[0015] Figure 4 A flow chart of a method for measuring pipeline gas permeability parameters according to another embodiment of the present application;

[0016] Figure 5 A flowchart of a method for determining mapping relationship data according to another embodiment of the present application;

[0017] Figure 6 The figure is a diagram of the internal structure of a computer device provided according to one embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0019] With the deepening of globalization, energy demand is growing exponentially. In this context, clean and efficient gas energy, such as natural gas and hydrogen, has attracted more and more attention due to its environmental protection characteristics and high efficiency. The storage and transportation of gas energy is a vital link in its industrial chain. Especially for natural gas and hydrogen energy with high permeability, if their performance is not evaluated during the development and design of gas pipelines, it may cause the deterioration of material properties, increase the leakage loss of gas energy, and even cause explosions, seriously affecting the transportation efficiency and safety performance.

[0020] Taking gas energy as an example, hydrogen energy is receiving more and more attention as a clean and efficient energy source. It has key technical challenges in production, storage, transportation and application. In the hydrogen energy industry chain, storage and transportation are crucial links. Among them, hydrogen pipelines are the main means of transporting hydrogen, and their safe operation is crucial to the stability and reliability of the entire hydrogen energy system.

[0021] Hydrogen pipelines are considered to be an effective way to achieve large-scale transportation and utilization of hydrogen, among which non-metallic hydrogen pipelines have great application prospects. Due to the small molecular size and high permeability of hydrogen, in order to ensure safe operation, traditional construction pipelines use low-carbon and high-strength seamless steel pipes, which have high material costs and are difficult to build. Compared with metal pipelines, non-metallic pipelines have lower economic costs and higher resistance to hydrogen embrittlement and corrosion, but non-metallic pipelines have the problem of hydrogen permeation, which will not only cause the degradation of material properties, but also increase hydrogen leakage losses, and even cause explosions, seriously affecting transportation efficiency and safety performance. Therefore, in the development and design process of non-metallic hydrogen pipelines, clarifying the pipeline hydrogen permeation rate and permeability coefficient will help evaluate the pipeline's resistance to hydrogen permeation and assist in the performance analysis and evaluation of non-metallic pipelines.

[0022] In the related art, gas permeation detection devices are often used for film and sheet materials, such as G2 / 131 gas permeability tester, VAC-V2 permeability tester, GDP-C gas permeability tester, etc. The test sample area is small and the film thickness is small, which has little reference significance for the gas permeability performance of pipes with a certain wall thickness and a large length. The patent "A pipe gas permeability test device", publication number: CN203811338U, discloses a pipeline gas permeation detection device, but the patent only tests the pressure of the permeating gas, the test data is single, the error is large, and it cannot well explain the gas permeation per unit time of the pipe. In addition, the pipe specifications are greatly restricted and the test efficiency is low. In terms of engineering applications, the disc sample cannot directly reflect the actual situation of gas permeation in the pipeline, and due to the particularity of the pipeline model, the deflation process of the pipe itself will affect the test results. At present, most gas permeation tests are characterized by permeation pressure, and the test data is single and the efficiency is low; and due to the special physical and chemical properties of small hydrogen molecules, safety and explosion protection should be paid attention to when conducting related gas permeation tests. In comparison, the standard system for gas permeation testing of flat plate models is more mature and the test operation is simpler.

[0023] Based on this, the embodiment of this specification provides a pipeline gas permeation parameter measurement device 100, such as Figure 1 As shown, it includes: a plate model measurement module 110, a pipeline model calculation module 120 and a permeability parameter correction module 130, wherein:

[0024] The flat plate model measurement module 110 is used to perform a target gas permeation test on a test sheet of a specified thickness, measure gas permeation parameters during the permeation test, and obtain mapping relationship data between the test sheet thickness and the flat plate permeation parameters.

[0025] Among them, the test sheet can be a flat sheet model with a certain thickness, and the test sheet can be a sheet model of the same material as the actual gas pipeline. The target gas can be a gas whose permeability characteristics in a specific material need to be evaluated. For example, it can be any gas that is transported or stored using a gas pipeline, such as natural gas, hydrogen, and nitrogen. The gas permeation parameter can be a physical quantity used to describe the material's permeability to the target gas, and is used to evaluate the material's permeability to the target gas under specific conditions. The flat plate permeation parameter can be a gas permeation parameter of a flat sheet model obtained by performing a permeation test of the target gas on a test sheet of a specified thickness, and measuring the gas permeation parameter during the permeation test. For example, the target gas can be hydrogen, and a pipe disc of the same material as the actual hydrogen pipeline is used as a test sheet. Through the permeation test, the gas permeation characteristics of the actual hydrogen pipeline under certain specific conditions are simulated to obtain the hydrogen permeation parameters; the target gas can also be nitrogen, and a pipe disc of the same material as the actual nitrogen pipeline is used as a test sheet. Through the permeation test, the gas permeation characteristics of the actual nitrogen pipeline under certain specific conditions are simulated to obtain the nitrogen permeation parameters. Exemplarily, the gas permeability parameters may include a gas permeability coefficient and a gas permeability rate. The gas permeability coefficient and the gas permeability rate can be converted to each other through a certain relationship, that is, the gas permeability rate can be obtained based on the gas permeability coefficient; similarly, the gas permeability coefficient can also be obtained based on the gas permeability rate. The gas permeability coefficient can be a material property used to describe the inherent characteristics of the material, which is related to the structure and chemical composition of the material. The gas permeability rate can refer to the gas flow rate through a unit area of ​​material per unit time under specific conditions.

[0026] A permeability test may refer to a material test for evaluating the permeability of a material to a specific gas. Specifically, a test sheet may be placed between two gas environments with different pressures or concentrations, and gas permeability parameters may be measured to obtain gas permeability parameters of the test sheet. Exemplarily, a test sheet may be placed between two different environments to measure the rate at which gas passes through a material. Further, mapping relationship data between the thickness of the test sheet and the flat plate permeability parameters may be constructed based on the gas permeability parameters of the test sheet, wherein the mapping relationship data may be used to describe the corresponding relationship between the thickness of the test sheet and the flat plate permeability parameters, and may include multiple corresponding flat plate permeability parameters obtained by performing permeation tests of a target gas on multiple test sheets of different specified thicknesses. Exemplarily, the mapping relationship data may be a table describing the corresponding relationship between the thickness of the test sheet and the flat plate permeability parameters, or may be a function describing the relationship between the thickness of the test sheet and the flat plate permeability parameters.

[0027] The pipeline model calculation module 120 is used to calculate the permeability parameters of the target pipeline model of the target thickness to obtain the initial permeability parameters of the target pipeline model.

[0028] Among them, the target pipeline model can be a pipeline model with the same material and parameters as the actual gas pipeline. Exemplarily, if the target gas is hydrogen, a pipeline model with the same material as the actual hydrogen pipeline can be used as the target pipeline model. Permeation parameter calculation can refer to the process of obtaining the gas permeation parameters of the target pipeline model by computer calculation based on the parameters of the pipeline model given in advance. Specifically, when performing the permeation parameter calculation, a pipeline model with the same parameters as the test sheet used for the permeation test can be selected as the target pipeline model, and the specified thickness of the test sheet is used as the target thickness of the pipeline model to carry out the permeation parameter calculation of the target pipeline model. Exemplarily, the pipeline parameters of the given target pipeline model may include: nominal diameter, target thickness and pipeline length; the given environmental parameters may include the temperature of the permeation test, the pressure of the target gas, and the volume of the test cavity used in the permeation test. It can be understood that since the diffusion process of the target gas in the pipeline satisfies Fick's law, and the change in the relationship between the solubility of the target gas in the target pipeline and the target gas pressure satisfies Henry's law, further, the non-steady-state equation of the target gas diffusion process of the target pipeline model is solved by numerical integration, and the PDEPE function is called to calculate the change of the target gas pressure on the outer wall of the target pipeline with time to calculate the permeability parameters, and finally the initial permeability parameters of the target pipeline model are obtained.

[0029] The permeability parameter correction module 130 is used to match and search in the mapping relationship data according to the target thickness, obtain the target plate permeability parameter corresponding to the target thickness, and modify the initial permeability parameter using the target plate permeability parameter to obtain the target permeability parameter of the target pipeline model.

[0030] Specifically, the flat plate permeability parameter of the test sheet that matches the target pipe model thickness can be searched in the mapping relationship data, and used as the target flat plate permeability parameter. Exemplarily, if the mapping relationship data exists in a table form, the target thickness can be used as an independent variable, the thickness column of the table can be searched, and the flat plate permeability parameter corresponding to the target thickness in the flat plate permeability parameter column can be obtained, and used as the target flat plate permeability parameter corresponding to the target thickness.

[0031] Further, according to the target plate permeability parameter corresponding to the target thickness found, the initial permeability parameter of the target pipeline model obtained by the permeability parameter calculation is adjusted or corrected to obtain the target permeability parameter of the target pipeline model. Exemplarily, the adjustment or correction of the initial permeability parameter of the target pipeline model obtained by the permeability parameter calculation may be to directly replace the initial permeability parameter of the target pipeline model with the target plate permeability parameter, or to perform proportional calculation on the initial permeability parameter of the target pipeline model based on the target plate permeability parameter to obtain the modified permeability parameter of the target pipeline model. Further, the modified permeability parameter is used as the target permeability parameter of the target pipeline model.

[0032] In the pipeline gas permeability parameter measurement device of the above-mentioned embodiment, first, a target gas permeation test is performed on a test sheet of a specified thickness through a flat plate model measurement module, and gas permeation parameters are measured during the permeation test to obtain mapping relationship data between the test sheet thickness and the flat plate permeability parameters; secondly, the permeability parameters of the target pipeline model of the target thickness are calculated through the pipeline model calculation module to obtain the initial permeability parameters of the target pipeline model; finally, the permeability parameter correction module matches and searches in the mapping relationship data according to the target thickness to obtain the target flat plate permeability parameters corresponding to the target thickness, and the initial permeability parameters are modified using the target flat plate permeability parameters to obtain the target permeability parameters of the target pipeline model. At this point, the permeability parameters of the pipeline model of the same thickness are corrected using the pre-established mapping relationship data between the test sheet thickness and the flat plate permeability parameters, thereby realizing a device that can improve the efficiency of the gas permeability parameter measurement process and the accuracy of the measurement results of the gas transmission pipeline, and effectively improves the efficiency and accuracy of the pipeline gas permeability parameter measurement.

[0033] In some embodiments, the flat plate model measurement module 110 includes a permeation chamber, a test sheet located in the permeation chamber, and a permeation parameter measurement unit. The permeation chamber is divided into a first space and a second space by the test sheet. The permeation parameter measurement unit is used to measure the permeation parameters according to the test temperature in the permeation chamber, the first pressure of the target gas in the first space, the rate of change of the second pressure in the second space, the area of ​​the test sheet, the thickness of the test sheet, and the volume of the second space, so as to obtain the flat plate permeation parameters of the test sheet.

[0034] Among them, the first pressure can be a preset pressure of the target gas that is pre-set according to the test environment before the permeation test. Exemplarily, it can be the pressure of the target gas applied to the first space of the permeation cavity on one side of the test sheet in the permeation test. Specifically, the target gas of preset pressure is introduced into the first space of the permeation cavity, and after the test temperature is stabilized, the pressure of the target gas in the first space of the permeation cavity can be used as the first pressure. It is also understandable that the second pressure can refer to the pressure collected on the other side of the test sheet as the target gas gradually permeates the test sheet in the permeation test. Specifically, the second pressure can be measured in the second space during the permeation process of the target gas in the permeation cavity, which can be used to reflect the concentration change of the target gas after passing through the test sheet. Further, the concentration change of the target gas after passing through the test sheet can be characterized by the rate of change of the second pressure, which is the rate of change of the second pressure during the process of the target gas permeating into the second space through the test sheet and the second space reaching a stable state. Specifically, as the permeation test proceeds, the target gas gradually penetrates through the test sheet from one side to the other, and penetrates from the first space of the permeation chamber via the test sheet to the second space, causing the pressure in the second space to change. At this time, the rate of change of the second pressure in the second space is recorded, and the permeation parameters are calculated based on the test temperature in the permeation chamber, the first pressure of the target gas in the first space, the area of ​​the test sheet, the thickness of the test sheet and the volume of the second space, so as to obtain the flat plate permeation parameters of the test sheet.

[0035] Exemplarily, the first pressure can be recorded as the pressure of the first space of the permeation cavity applied by the target gas to one side of the test sheet in the permeation test, that is, the pressure on the high-pressure side of the test sheet, and the second pressure can be recorded as the pressure in the second space when the target gas gradually permeates from one side to the other side through the test sheet, from the first space of the permeation cavity to the second space via the test sheet, that is, the pressure on the low-pressure side of the test sheet. It is understandable that during the permeation test, the target gas gradually permeates from the high-pressure side to the low-pressure side through the test sheet, causing the pressure on the low-pressure side to gradually rise. Further, using a pressure sensor or a similar measuring device, the pressure change on the low-pressure side is monitored in real time and the rate of change of the pressure on the low-pressure side with time is recorded, and finally the rate of change of the second pressure in the second space can be obtained, and then the permeation parameter calculation method can be used to calculate the permeation parameter in combination with the test temperature in the permeation cavity, the first pressure of the target gas in the first space, the area of ​​the test sheet, the thickness of the test sheet, and the volume of the second space.

[0036] In the above embodiment, a permeation test of the test sheet is carried out using a permeation parameter measurement unit. Based on the experimental environment of the permeation chamber, the pressure change after the target gas permeates is monitored in real time and the pressure-time data during the permeation process is recorded. The gas permeation situation is further quantitatively analyzed based on the rate of change of the second pressure, thereby further improving the efficiency of the gas permeation parameter measurement process based on the flat plate model and the accuracy of the measurement results, providing a more accurate data basis for the subsequent permeation parameter correction module, thereby ensuring the quality and reliability of the measurement process of pipeline gas permeation parameters.

[0037] In some embodiments, the permeability parameter includes a permeability coefficient, which can be determined by the following formula:

[0038]

[0039] Among them, P e is the flat permeability coefficient of the test sheet; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; S is the area of ​​the test sheet; L is the thickness of the test sheet; P is the first pressure of the target gas in the first space.

[0040] In the above implementation, the flat plate permeability coefficient can be quickly obtained through formula calculation, which improves the efficiency of the measurement process. And by using a clear formula to quantitatively calculate the flat plate permeability coefficient, the flat plate permeability coefficient of the test sheet can be accurately measured. Furthermore, the flat plate permeability coefficient of the test sheet obtained through accurate calculation provides reliable basic data for the subsequent permeability parameter correction module, which helps to further optimize and calibrate the gas permeability parameters of pipes of the same thickness.

[0041] In some embodiments, the test sheet is a circular sheet.

[0042] The circular sheet can be a flat sheet model with a certain thickness. For example, if the target gas is hydrogen, a circular sheet of a pipe made of the same material as the actual hydrogen pipeline can be used as the circular sheet. Through a permeation test, the gas permeation characteristics of the actual hydrogen pipeline under certain specific conditions are simulated to obtain the gas permeation parameters. Specifically, the permeability coefficient is determined by the following formula:

[0043]

[0044] Among them, P e is the flat permeability coefficient of the test sheet; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; d is the diameter of the circular sheet; L is the thickness of the test sheet; P is the first pressure of the target gas in the first space.

[0045] In some embodiments, the permeation parameter further comprises a permeation rate, which is determined by the following formula:

[0046]

[0047] Where J is the permeation rate; P e is the flat plate permeability coefficient of the test sheet; P is the first pressure of the target gas in the first space; L is the thickness of the test sheet.

[0048] In the above embodiment, the permeation rate calculation formula further enriches the connotation of the permeation parameter. The calculation of the permeation rate provides a comprehensive evaluation of the permeation parameters of the test sheet plate, which helps to further optimize and calibrate the gas permeation parameters of pipes of the same thickness.

[0049] In some embodiments, before the permeation test begins, the pressures in the first space and the second space are respectively less than or equal to a preset vacuum degree, and during the permeation test, the first space is filled with the target gas, and the test sheet is in the target gas.

[0050] Among them, the preset vacuum degree can be a low pressure level set in advance that is far below atmospheric pressure or even close to or reaches a vacuum state. Specifically, in the preparation stage of the penetration test, in order to eliminate the interference of air and other gases, the penetration chamber can be emptied by a vacuum pump so that the pressure in the first space and the second space inside the penetration chamber is less than or equal to the preset vacuum degree. Exemplarily, before the penetration test, the test sheet is first placed in a constant temperature penetration chamber, and the vacuum pump and the pipeline valve connecting the vacuum pump to the penetration chamber are opened to vacuum degas for more than 24 hours. Further, 4Pa can be taken as the preset vacuum degree. When the measured vacuum degree is less than or equal to 4Pa, it means that the emptying in the penetration chamber is basically completed, and the vacuum pump is turned off. Optionally, the above-mentioned emptying process can be performed multiple times to ensure that the pressure in the first space and the second space is less than or equal to the preset vacuum degree before the penetration test begins.

[0051] The flat plate model measurement module 110 further includes a data recording unit for collecting the second pressure of the target gas in the second space and determining the rate of change of the second pressure during the process of the permeation reaching a stable state.

[0052] The second pressure may refer to the pressure collected on the other side of the test sheet as the target gas gradually permeates through the test sheet in the permeation test. During the permeation process, the concentration change of the target gas after passing through the test sheet can be characterized by the rate of change of the second pressure, which is the rate of change of the second pressure during the process of the target gas permeating into the second space through the test sheet and the second space reaching a stable state.

[0053] In the above embodiment, the pressure in the first space and the second space is respectively less than or equal to the preset vacuum degree before the permeation test begins, so as to ensure that there is no other gas interference in the system at the beginning of the experiment, thereby ensuring the accuracy and repeatability of the permeation test. Furthermore, by emptying and clearing the original gas in the permeation cavity, it is avoided to affect the accurate measurement of gas permeability, thereby ensuring that the pressure conditions on both sides of the test sheet start from the same low level, so that the permeation process is only affected by the target gas.

[0054] In some embodiments, Figure 2 As shown, the flat plate model measurement module 110 further includes a gas source 202 , a gas storage bottle 204 , a vacuum pump 206 and a thermometer 208 .

[0055] The thermometer 208 is used to detect the test temperature in the permeation chamber 210 .

[0056] The test temperature may refer to the temperature conditions of the permeation chamber 210 and the test sheet 216 when the permeation test is performed. It is understood that, based on actual engineering applications and the accuracy of the permeation test, the test temperature may be any temperature value in the temperature range of greater than or equal to -20°C and less than or equal to 60°C. For example, room temperature may be used as the test temperature of the permeation test, and the thermometer 208 may be used to monitor in real time whether the permeation chamber 210 maintains a constant temperature state.

[0057] The vacuum pump 206 is used to extract the gas in the permeation chamber 210 before the permeation test begins, until the pressure in the first space 212 and the second space 214 are respectively less than or equal to a preset vacuum degree.

[0058] When the pressures in the first space 212 and the second space 214 are respectively less than or equal to a preset vacuum degree, the gas source 202 provides the target gas to the first space 212 through the gas storage bottle 204 .

[0059] Among them, the gas source 202 can be a device or system for providing the target gas. The gas cylinder 204 can be a container for storing the target gas provided by the gas source 202. Exemplarily, the gas cylinder 204 can store a large amount of target gas, and can have a high-pressure design to adjust the release rate and pressure of the target gas. Further, the release rate and pressure of the target gas can be adjusted by the gas cylinder 204 to ensure that the target gas enters the permeation chamber 210 at a constant rate and pressure. Exemplarily, the pressure value of the target gas displayed by the pressure sensor loaded in the gas cylinder 204 can be slightly higher than the preset first pressure by adjusting the pipeline valve connected to the gas source 202, so that the target gas has sufficient pressure when entering the first space 212 of the permeation chamber 210, and the gas permeation parameter measurement can be smoothly performed during the permeation test.

[0060] Optionally, the flat plate model measurement module 110 may further include a buffer tank 218 connected to the gas source 202 , the gas storage bottle 204 , the vacuum pump 206 and the permeation chamber 210 , respectively.

[0061] In the above embodiment, the test temperature in the permeation chamber is detected by a thermometer. In the permeation test, a slight change in temperature may lead to a significant difference in the measurement results of the gas permeation parameters. Real-time monitoring of the test temperature helps to ensure the accuracy of the data. The original gas in the permeation chamber is evacuated and removed by a vacuum pump to avoid affecting the accurate measurement of the gas permeability. The target gas for the permeation test is provided by a gas source, while ensuring that the purity and pressure of the target gas meet the requirements of the permeation test. The release rate and pressure of the target gas are adjusted by a gas storage bottle to meet different needs during the permeation test. Optionally, a buffer tank can be used to reduce pressure fluctuations caused by the flow of the target gas to maintain pressure stability during the permeation test; it is also used to provide additional volume, which helps the target gas reach the same temperature as the test environment before entering the permeation chamber, ensuring that the impact of temperature on the test results is minimized.

[0062] In some embodiments, for the same sheet thickness, the flat plate permeability parameters in the mapping relationship data tend to be consistent with the mid-diameter corrected permeability parameters of the pipe model.

[0063] The median diameter corrected permeability parameter may be a permeability parameter obtained by correcting the initial permeability parameter of the target pipeline model using the median diameter formula. Specifically, the median diameter formula is as follows:

[0064]

[0065] Where DM is the median diameter of the target pipeline model; n is the target thickness of the target pipe model; d n The nominal outer diameter of the pipe of the target pipe model.

[0066] Furthermore, the initial permeability parameters of the target pipeline model are corrected using the median diameter formula in the following way:

[0067]

[0068] Among them, P e is the permeability parameter after median diameter correction; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; DM is the median diameter of the target pipeline model; W is the length of the target pipeline model; L is the target thickness of the target pipeline model; and P is the first pressure of the target gas in the first space.

[0069] The infiltration parameter correction module 130 is further used to replace the initial infiltration parameter with the target plate infiltration parameter and use it as the target infiltration parameter.

[0070] It can be understood that the test sheet used for the permeability test to obtain the target flat plate permeability parameters and the target pipeline model used for the permeability parameter calculation to obtain the initial permeability parameters are both determined based on the model material that is the same as the actual gas pipeline material. Therefore, the target flat plate permeability parameters obtained by permeability testing on the test sheet of the same thickness can be used to simulate the gas permeability parameters of the actual gas pipeline during the target gas transportation process; the initial permeability parameters of the target pipeline model obtained by permeability parameter calculation on the pipeline model of the same thickness can also be used to simulate the gas permeability parameters of the actual gas pipeline during the target gas transportation process.

[0071] It should be noted that, due to the bending characteristics of the pipeline model, its inner surface will not always be similar to the flat sheet model spread in a plane. When calculating the permeability parameters of the pipeline model of equal thickness, the initial permeability parameters of the target pipeline model obtained will have certain errors. Further, the initial permeability parameters of the target pipeline model are corrected using the mid-diameter formula to obtain the mid-diameter corrected permeability parameters of the pipeline model, which will be consistent with the target flat plate permeability parameters obtained by the permeability test based on the flat sheet model of equal thickness. Specifically, because the mid-diameter formula takes into account the influence of the wall thickness of the target pipeline model on the internal space of the pipeline, when the wall thickness of the target pipeline model is smaller than the nominal outer diameter, the mid-diameter of the target pipeline model is similar to the thickness of the flat sheet model, so the mid-diameter of the target pipeline model can be used to approximately simulate the thickness of the flat sheet model. Further, based on the pre-constructed mapping relationship data between the thickness of the flat sheet model and the flat plate permeability parameters, the target flat plate permeability parameters matching the thickness of the target pipeline model can be found in the mapping relationship data according to the target thickness, and the initial permeability parameters are replaced by the target flat plate permeability parameters, and used as the target permeability parameters of the target pipeline model.

[0072] In the above embodiment, the initial permeability parameters are replaced by the target plate permeability parameters and used as the target permeability parameters, which not only ensures that the initial permeability parameters of the target pipeline model can be obtained by a quick and efficient calculation method, but also ensures that the final target permeability parameters have the same accuracy as the permeability parameters obtained by performing a permeation test on a test sheet of the same thickness through correction, thereby realizing a method that can improve the efficiency of the gas permeability parameter measurement process and the accuracy of the measurement results of the gas pipeline.

[0073] Optionally, in some embodiments, the permeability parameter correction module 130 further includes a quantitative correction unit for determining the corrected permeability parameter based on the standard size ratio SDR using the quantitative relationship between the target plate permeability parameter and the initial permeability parameter, and using the corrected permeability parameter as the target permeability parameter.

[0074] The standard dimension ratio SDR may be a ratio data used to describe the corresponding relationship between the nominal outer diameter of the pipe and the pipe thickness of the target pipe model based on the same material as the actual gas pipeline. The quantitative relationship between the target flat plate permeability parameter and the initial permeability parameter may be a relationship data used to describe the quantitative relationship between the initial permeability parameter obtained by permeability parameter calculation of the target pipe model determined based on the model material with the same material as the actual gas pipeline, and the flat plate permeability parameter obtained by permeability test of the flat sheet model with the same thickness determined based on the model material with the same material as the actual gas pipeline.

[0075] Specifically, the standard size ratio SDR can be calculated by the following formula:

[0076]

[0077] Where SDR is the standard dimension ratio; d n is the nominal outer diameter of the target pipeline model; n is the target thickness of the target pipe model.

[0078] It should be noted that in actual engineering production and application, for the target pipeline model, if its pipeline thickness is determined, its pipeline nominal outer diameter will only have a fixed value. Based on the above reasons, for example, the standard dimension ratio SDR value of the target pipeline model used to describe the corresponding relationship between the pipeline nominal outer diameter and the pipeline thickness can often be 9, 11 or 13.

[0079] It can be understood that the gas permeability parameters may include gas permeability coefficient and gas permeability rate, wherein the gas permeability coefficient and the gas permeability rate can be converted to each other through a certain relationship, that is, the gas permeability rate can be obtained based on the gas permeability coefficient; similarly, the gas permeability coefficient can also be obtained based on the gas permeability rate. Here, taking the gas permeability rate as an example, specifically, the quantitative relationship between the target plate permeability parameter and the initial permeability parameter can be calculated by the following formula:

[0080]

[0081] Among them, J 1i is the target flat plate penetration rate obtained by conducting penetration tests on test sheets of equal thickness; J 2i is the initial permeability rate of the target pipeline model obtained by calculating the permeability parameters of the pipeline model with the same thickness; i is the pipeline standard dimension ratio SDR, which can be 9, 11 or 13; ΔJ is the quantitative relationship between the target plate permeability parameter and the initial permeability parameter.

[0082] It can be seen from the above formula that the quantitative relationship between the target plate permeability parameter and the initial permeability parameter is related to the standard size ratio SDR. Specifically, when the pipeline standard size ratio SDR is 9, 11 or 13, for different actual gas transmission pipelines, the standard size ratio of the corresponding target pipeline model and the quantitative relationship ΔJ between the target plate permeability parameter and the initial permeability parameter obtained based on the same thickness have a one-to-one correspondence. Further, based on the above one-to-one correspondence, the corresponding relationship data between the standard size ratio SDR of the target pipeline model and the quantitative relationship ΔJ can be constructed, which describes the corresponding relationship between the standard size ratio SDR of the target pipeline model and the quantitative relationship ΔJ between the target plate permeability parameter and the initial permeability parameter when the nominal outer diameter of the pipeline of the target pipeline model is determined.

[0083] Exemplarily, the correspondence data may be a correspondence table, which describes the correspondence between the standard dimension ratio SDR, the quantitative relationship ΔJ and the corrected permeability parameter. Specifically, first, when the standard dimension ratio SDR of the target pipeline model is determined, the quantitative relationship ΔJ between the initial permeability parameter and the flat plate permeability parameter is calculated based on the initial permeability parameter and the flat plate permeability parameter. Further, the nominal outer diameter of the pipeline of the target pipeline model and the quantitative relationship ΔJ are used to search in a pre-established correspondence table, and the corrected permeability parameter of the corresponding target pipeline model is determined and used as the target permeability parameter of the target pipeline model. Optionally, the corrected permeability parameter of the target pipeline model may be the corrected permeability parameter corrected by using the median diameter formula for the initial permeability parameter of the target pipeline model, or the target flat plate permeability parameter matching the thickness of the target pipeline model may be found in the mapping relationship data according to the target thickness, and the target flat plate permeability parameter may be used as the corrected permeability parameter of the target pipeline model.

[0084] In the above embodiment, the permeability parameter correction module 130 also includes a quantitative correction unit for establishing corresponding relationship data based on the standard dimension ratio SDR, the quantitative relationship ΔJ and the corrected permeability parameters. Furthermore, the nominal outer diameter of the pipe of the target pipe model and the quantitative relationship ΔJ are used to search in the pre-established corresponding relationship table to determine the corrected permeability parameters of the corresponding target pipe model and use them as the target permeability parameters of the target pipe model. It is ensured that the initial permeability parameters of the target pipe model can be obtained by a fast and efficient calculation method, and the final target permeability parameters are ensured to have the same accuracy as the permeability parameters obtained by the permeability test of the test sheet of the same thickness through correction. Optionally, the pre-established corresponding relationship data may also include the nominal outer diameter, thickness and length of the pipe of the target pipe model and other dimensional information, which has certain engineering reference significance.

[0085] In some embodiments, the test sheet is verified by CT scanning to ensure that the test sheet meets the penetration test requirements.

[0086] The penetration test requirements may refer to certain characteristics that the test sheet should have to satisfy the normal conduct of the penetration test. For example, the test sheet should be a flat sheet model with a certain thickness, and its interior is free of defects and damage. Specifically, the test sheet can be verified by CT scanning before the penetration test.

[0087] In the above-mentioned embodiment, the test sheets are inspected by means of high-precision CT scanning verification detection means, and the test sheets that meet the penetration test requirements are accurately screened out to ensure that each test sheet meets the penetration test requirements, thereby reducing irrelevant variables in the test process, thereby ensuring the scientificity, systematicness and effectiveness of the entire penetration test process.

[0088] The pipeline gas permeability parameter measuring device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions. Each module in the above pipeline gas permeability parameter measuring device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0089] This embodiment provides a method for measuring pipeline gas permeability parameters. Figure 3 is a flow chart of a method for measuring pipeline gas permeability parameters according to an embodiment of the present application, such as Figure 3 As shown, the method comprises the following steps:

[0090] S310, performing a target gas permeation test on a test sheet of a specified thickness, measuring gas permeation parameters during the permeation test, and obtaining mapping relationship data between the test sheet thickness and the flat plate permeation parameters.

[0091] Wherein, the test sheet can be a flat sheet model with a certain thickness. The gas permeation parameter can be a physical quantity used to describe the material's ability to permeate the target gas, and is used to evaluate the material's permeability to the target gas under specific conditions. The permeation test can refer to a material test for evaluating the material's ability to permeate a specific gas. Specifically, the test sheet can be placed between two gas environments with different pressures or concentrations, and the gas permeation parameter can be measured to obtain the gas permeation parameter of the test sheet. Exemplarily, the test sheet can be placed between two different environments to measure the rate at which gas passes through the material. Further, the mapping relationship data between the test sheet thickness and the flat plate permeation parameter can be constructed based on the gas permeation parameter of the test sheet, wherein the mapping relationship data can be used to describe the corresponding relationship between the test sheet thickness and the flat plate permeation parameter, and can include performing a permeation test of the target gas on a plurality of test sheets of different specified thicknesses, and obtaining a plurality of corresponding flat plate permeation parameters.

[0092] S320, calculating the permeability parameters of the target pipeline model with the target thickness to obtain the initial permeability parameters of the target pipeline model.

[0093] The target pipeline model may refer to a pipeline model with a certain thickness, length, diameter and other parameters. The permeability parameter calculation may refer to a process of directly calculating the gas permeability parameters of the target pipeline model by a computer based on the parameters of the pipeline model given in advance. Specifically, when performing the permeability parameter calculation, a pipeline model with the same parameters as the test sheet used for the permeability test may be selected as the target pipeline model, and the specified thickness may be used as the target thickness to perform the permeability parameter calculation to obtain the initial permeability parameters of the target pipeline model.

[0094] S330 , matching and searching the mapping relationship data according to the target thickness to obtain the target plate penetration parameter corresponding to the target thickness.

[0095] Specifically, the flat plate penetration parameter of the test sheet that matches the target pipeline model thickness can be found in the mapping relationship data and used as the target flat plate penetration parameter.

[0096] S340, modifying the initial permeability parameters using the target plate permeability parameters to obtain target permeability parameters of the target pipeline model.

[0097] Furthermore, according to the target plate permeability parameters corresponding to the found target thickness, the initial permeability parameters of the target pipeline model obtained by permeability parameter calculation are adjusted or corrected to obtain the target permeability parameters of the target pipeline model.

[0098] In the above implementation, a method for measuring pipeline gas permeability parameters is proposed, in which a permeability test of a target gas is performed on a test sheet of a specified thickness, and gas permeability parameters are measured during the permeability test to obtain mapping relationship data between the test sheet thickness and the flat plate permeability parameters; permeability parameters are calculated for a target pipeline model of the target thickness to obtain initial permeability parameters of the target pipeline model; the mapping relationship data is matched and searched according to the target thickness to obtain target flat plate permeability parameters corresponding to the target thickness; the initial permeability parameters are modified using the target flat plate permeability parameters to obtain target permeability parameters of the target pipeline model. Finally, the permeability parameters of the pipeline model of the same thickness are corrected based on the pre-established mapping relationship data between the test sheet thickness and the flat plate permeability parameters, thereby realizing a method that can improve the efficiency of the gas permeability parameter measurement process and the accuracy of the measurement results of the gas transmission pipeline.

[0099] Optionally, this embodiment further provides a method for measuring pipeline gas permeability parameters, such as Figure 4 As shown, the method comprises the following steps:

[0100] S410 , calculating the permeability parameters of a target pipeline model with a target thickness to obtain initial permeability parameters of the target pipeline model.

[0101] The target pipeline model may refer to a pipeline model with a certain thickness, length, diameter and other parameters. The permeability parameter calculation may refer to a process of directly calculating the gas permeability parameters of the target pipeline model by a computer based on the parameters of the pipeline model given in advance. Specifically, when performing the permeability parameter calculation, a pipeline model with the same parameters as the test sheet used for the permeability test may be selected as the target pipeline model, and the specified thickness may be used as the target thickness to perform the permeability parameter calculation to obtain the initial permeability parameters of the target pipeline model.

[0102] S420, matching and searching the mapping relationship data according to the target thickness to obtain the target plate penetration parameter corresponding to the target thickness.

[0103] The thick mapping relationship data may be used to describe the corresponding relationship between the thickness of the test sheet and the flat plate permeability parameter, and may include a plurality of corresponding flat plate permeability parameters obtained by performing a target gas permeation test on a plurality of test sheets of different specified thicknesses. Specifically, the flat plate permeability parameter of the test sheet matching the thickness of the target pipeline model may be searched in the mapping relationship data and used as the target flat plate permeability parameter.

[0104] S430, modifying the initial permeability parameters using the target plate permeability parameters to obtain target permeability parameters of the target pipeline model.

[0105] Furthermore, according to the target plate permeability parameters corresponding to the found target thickness, the initial permeability parameters of the target pipeline model obtained by permeability parameter calculation are adjusted or corrected to obtain the target permeability parameters of the target pipeline model.

[0106] Optionally, in some embodiments, please refer to the attached Figure 5 The flat plate model uses test sheets of different specified thicknesses, matches and searches the mapping relationship data according to the target thickness, and obtains the target flat plate penetration parameters corresponding to the target thickness, including:

[0107] S510, performing a permeation test of a target gas on a test sheet of a specified thickness, measuring gas permeation parameters during the permeation test, and obtaining a measurement result.

[0108] The test sheet may be a flat sheet model with a certain thickness. The gas permeation parameter may be a physical quantity used to describe the permeability of a material to a target gas, and is used to evaluate the permeability of the material to the target gas under specific conditions. Specifically, the test sheet may be placed between two gas environments with different pressures or concentrations, and the gas permeation parameter may be measured to obtain a measurement result.

[0109] S520: Based on the measurement results, construct mapping relationship data between the test sheet thickness and the flat plate penetration parameters.

[0110] The mapping relationship data is used to modify the initial permeability parameters of the target pipeline model to obtain the target permeability parameters of the target pipeline model. It can be understood that the initial permeability parameters are obtained by calculating the permeability parameters of the target pipeline model.

[0111] Optionally, this embodiment further provides a method for measuring pipeline gas permeation parameters, wherein a test sheet is located in a permeation cavity, the permeation cavity is divided into a first space and a second space by the test sheet, a gas source, a gas storage bottle, a vacuum pump and a thermometer are respectively connected to the permeation cavity, and the method comprises the following steps:

[0112] S602: Perform CT scanning verification on a test sheet of a specified thickness to ensure that the test sheet meets the penetration test requirements. The test sheet is a flat sheet model with a certain thickness.

[0113] S604. Before the penetration test begins, use a vacuum pump to extract the gas in the penetration chamber until the pressure in the first space and the pressure in the second space are respectively less than or equal to a preset vacuum degree.

[0114] Exemplarily, the permeation test and the pre-test preparation process are carried out at a test temperature of 293.15K. The test sheet can be placed in a constant temperature permeation chamber, and the vacuum pump and the pipeline valve connecting the vacuum pump and the permeation chamber are opened to vacuum degas for more than 24 hours. Furthermore, 4Pa can be taken as the preset vacuum degree, and the pressure of the permeation chamber can be detected in real time. When the measured vacuum degree is less than or equal to 4Pa, it means that the permeation chamber is basically emptied, and the vacuum pump is turned off.

[0115] S606: When the pressures in the first space and the second space are respectively less than or equal to a preset vacuum degree, the gas source provides hydrogen to the first space through a gas storage bottle.

[0116] S608. Until the first space is filled with hydrogen, a hydrogen permeation test is performed on a test sheet of specified thickness. During the permeation test, gas permeation parameters are measured. Based on the rate of change of the first pressure of hydrogen in the first space and the second pressure in the second space, the flat plate permeability coefficient of the test sheet is obtained, and mapping relationship data between the test sheet thickness and the flat plate permeability parameters are constructed.

[0117] The flat plate permeability parameters can be gas permeability parameters for a flat plate model obtained by measuring the gas permeability parameters during the permeation test of a test sheet of a specified thickness for hydrogen. Exemplarily, the test sheet is a flat sheet model with a certain thickness, and the gas permeability parameters of the flat plate model include the gas permeability coefficient and the gas permeation rate. If the target gas is hydrogen, the hydrogen permeability coefficient of the test sheet can be calculated by the following formula:

[0118]

[0119] Among them, P e is the hydrogen permeability coefficient of the test sheet; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; d is the diameter of the circular sheet; L is the thickness of the test sheet; P is the first pressure of hydrogen in the first space.

[0120] Furthermore, if the target gas is hydrogen, the hydrogen permeation rate of the test sheet can be calculated by the following formula:

[0121]

[0122] Wherein, J is the hydrogen permeation rate of the test sheet; P e is the hydrogen permeability coefficient of the test sheet; P is the first pressure of hydrogen in the first space; L is the thickness of the test sheet.

[0123] For example, a high-density polyethylene (HDPE) flat plate model with a thickness of 10 mm and a diameter of 20 mm is used as a test sheet, the test temperature T is set to 293.15 K; 1 MPa is set as the first pressure of the target gas in the first space; 0.1 m 3 In order to test the volume of the second space of the cavity, gas permeation parameters are measured during the permeation test.

[0124] The hydrogen permeability coefficient of the test sheet is: 9.553×10 -13 mol / (mm·MPa·s); the hydrogen permeation rate of the test sheet is: 3.439×10 -10 mol / (mm 2 h).

[0125] S610 , calculating the permeability parameters of a target pipeline model with a target thickness to obtain initial permeability parameters of the target pipeline model.

[0126] The target pipeline model may refer to a pipeline model with a certain thickness, length, diameter and other parameters. Specifically, the gas permeability parameters of the target pipeline model may be directly calculated by a computer based on the parameters of the pipeline model given in advance. The initial permeability parameters of the target pipeline model include an initial permeability coefficient and an initial permeability rate. For example, if the target gas is hydrogen, the initial permeability coefficient of the target pipeline model is calculated using the following formula:

[0127]

[0128] Among them, P e is the initial permeability coefficient of the target pipeline model; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; DN is the nominal outer diameter of the target pipeline model; W is the length of the target pipeline model; L is the thickness of the test sheet; P is the first pressure of the target gas in the first space.

[0129] Furthermore, if the target gas is hydrogen, the initial permeation rate of the target pipeline model can be calculated by the following formula:

[0130]

[0131] Where J is the initial permeability rate of the target pipeline model; P e is the initial permeability coefficient of the target pipeline model; P is the first pressure of hydrogen in the first space; L is the wall thickness of the target pipeline model.

[0132] For example, a HDPE pipe model with a nominal outer diameter of 110 mm, a thickness of 10 mm, and a length of 1000 mm is used as the target pipe model, and the test temperature T is set to 293.15 K; 1 MPa is set to the first pressure of the target gas in the first space; 0.1 m 3 To test the volume of the second space of the cavity, the initial permeability coefficient of the target pipeline model is obtained by substituting the calculation into the formula: 8.655×10 -13 mol / (mm·MPa·s), the initial permeability rate of the target pipeline model is: 3.116×10 -10 mol / (mm 2 h).

[0133] S612. Calculate the quantitative relationship between the plate permeability parameters and the initial permeability parameters.

[0134] For example, the standard size ratio SDR is calculated first, and the standard size ratio SDR can be obtained by the following formula:

[0135]

[0136] Where SDR is the standard dimension ratio; d n is the nominal outer diameter of the target pipeline model; n is the target thickness of the target pipe model.

[0137] Secondly, the quantitative relationship between the flat plate permeability parameter and the initial permeability parameter is determined based on the standard size ratio SDR. Taking the gas permeation rate as an example, specifically, the quantitative relationship between the flat plate permeability parameter and the initial permeability parameter can be calculated by the following formula:

[0138]

[0139] Among them, J 1i is the hydrogen permeation rate of the test sheet with the same thickness; J 2i is the initial permeability rate of the target pipeline model obtained by calculating the permeability parameters of the pipeline model with the same thickness; i is the pipeline standard dimension ratio SDR, which can be 9, 11 or 13; ΔJ is the quantitative relationship between the flat plate permeability parameter and the initial permeability parameter.

[0140] Exemplarily, the standard size ratio SDR is:

[0141]

[0142] Where SDR is the standard dimension ratio; d n is the nominal outer diameter of the target pipeline model; n is the target thickness of the target pipe model.

[0143] The quantitative relationship ΔJ between the plate permeability parameter and the initial permeability parameter is:

[0144]

[0145] Among them, J 1i is the hydrogen permeation rate of the test sheet with the same thickness; J 2 i is the initial permeability rate of the target pipeline model obtained by calculating the permeability parameters of the pipeline model with the same thickness; i is the pipeline standard dimension ratio SDR, which can be 9, 11 or 13; ΔJ is the quantitative relationship between the flat plate permeability parameter and the initial permeability parameter.

[0146] S614. Construct a corresponding relationship table between the standard dimension ratio SDR of the target pipeline model and the quantitative relationship ΔJ.

[0147] For example, when the test temperature is 20°C, if the target gas is hydrogen, the pre-established corresponding relationship table may be as shown in Table 1, including the nominal outer diameter of the target pipeline model, the standard dimension ratio SDR, the thickness, the hydrogen permeation rate of the test sheet, the initial permeation rate of the target pipeline model, the quantitative relationship ΔJ, the corrected permeability coefficient and the corrected permeation rate. Among them, the corrected coefficient and the corrected permeation rate are the corrected permeation parameters obtained by correcting the initial permeation parameters of the target pipeline model through the median diameter formula.

[0148] Table 1 Corresponding relationship of hydrogen permeability coefficient at test temperature 20℃

[0149]

[0150] S616, searching the corresponding relationship table for a corrected permeability parameter that matches the thickness of the target pipeline model, and using it as a target plate permeability parameter, modifying the initial permeability parameter using the target plate permeability parameter to obtain a target permeability parameter of the target pipeline model.

[0151] For example, if the target gas is hydrogen, the corrected permeability coefficient can be obtained by querying the corresponding relationship table according to the standard size ratio SDR and the quantitative relationship ΔJ to be 9.553×10 -13 mol / (mm·MPa·s), the corrected permeability rate is 3.439×10 -10 mol / (mm 2 h).

[0152] It can be understood that for the same sheet thickness, the flat plate permeability parameters in the mapping relationship data tend to be consistent with the permeability parameters after the mid-diameter correction of the pipeline model. Therefore, if the corrected permeability parameters matching the target pipeline model thickness are not found in the corresponding relationship table, the target flat plate permeability parameters matching the target pipeline model thickness can be found in the mapping relationship data based on the pre-constructed mapping relationship data between the flat sheet model thickness and the flat plate permeability parameters according to the target thickness, and the initial permeability parameters are corrected using the target flat plate permeability parameters to obtain the target permeability parameters of the target pipeline model.

[0153] For the specific definition of a method for measuring a pipeline gas permeability parameter, please refer to the definition of a device for measuring a pipeline gas permeability parameter above, which will not be repeated here. It should be understood that although the various steps in the above flowchart are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise clearly stated in this article, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least part of the steps in the above flowchart may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0154] The embodiment of the present application also provides a computer device, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for measuring pipeline gas permeation parameters is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0155] Those skilled in the art will understand that Figure 6The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0156] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0157] The embodiment of the present application provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method of any embodiment of the present application.

[0158] The above embodiments illustrate a device and method for measuring pipeline gas permeation parameters, which can be implemented by a computer chip or entity, or by a product with a certain function. A typical implementation device is a computer. Specifically, the computer can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0159] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0160] Those skilled in the art will appreciate that the embodiments of the present application may be provided as a method, system, or computer program product for measuring pipeline gas permeation parameters. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0161] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0162] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0163] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0164] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0165] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. Since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0166] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0167] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A device for measuring pipeline gas permeability parameters, characterized in that: The device includes a plate model measurement module, a pipeline model calculation module and a permeability parameter correction module; The flat plate model measurement module is used to perform a target gas permeation test on a test sheet of a specified thickness, measure gas permeation parameters during the permeation test, and obtain mapping relationship data between the test sheet thickness and the flat plate permeation parameters; The pipeline model calculation module is used to calculate the permeability parameters of the target pipeline model of the target thickness to obtain the initial permeability parameters of the target pipeline model; The permeability parameter correction module is used to perform a match search in the mapping relationship data according to the target thickness to obtain the target plate permeability parameter corresponding to the target thickness, and use the target plate permeability parameter to modify the initial permeability parameter to obtain the target permeability parameter of the target pipeline model.

2. The device according to claim 1, characterized in that The flat plate model measurement module comprises a permeation cavity, the test sheet located in the permeation cavity, and a permeation parameter measurement unit; the permeation cavity is divided into a first space and a second space by the test sheet; The permeation parameter measurement unit is used to measure the permeation parameters according to the test temperature in the permeation chamber, the first pressure of the target gas in the first space, the change rate of the second pressure in the second space, the area of ​​the test sheet, the thickness of the test sheet and the volume of the second space, so as to obtain the flat plate permeation parameters of the test sheet; wherein the change rate of the second pressure is the change rate of the second pressure in the process of the target gas penetrating into the second space through the test sheet and the second space reaching a stable state.

3. The device according to claim 2, characterized in that The permeability parameter includes a permeability coefficient; the permeability coefficient is determined by the following formula: Among them, P e is the flat permeability coefficient of the test sheet; V is the volume of the second space; R is the ideal gas molar constant; T is the test temperature; is the rate of change of the second pressure in the second space; S is the area of ​​the test sheet; L is the thickness of the test sheet; P is the first pressure of the target gas in the first space.

4. The device according to claim 3, characterized in that The test sheet is a circular sheet.

5. The device according to claim 3, characterized in that The penetration parameters also include the penetration rate; the penetration rate is determined by the following formula: Wherein, J is the permeation rate; P e is the flat plate permeability coefficient of the test sheet; P is the first pressure of the target gas in the first space; L is the thickness of the test sheet.

6. The device according to claim 2, characterized in that Before the penetration test begins, the pressures in the first space and the second space are respectively less than or equal to a preset vacuum degree; during the penetration test, the first space is filled with the target gas, and the test sheet is in the target gas; The flat plate model measurement module also includes a data recording unit; the data recording unit is used to collect the second pressure of the target gas in the second space and determine the change rate of the second pressure during the process of permeation reaching a stable state.

7. The device according to claim 6, characterized in that The flat plate model measurement module also includes a gas source, a gas storage bottle, a vacuum pump and a thermometer; The thermometer is used to detect the test temperature in the permeation chamber; The vacuum pump is used to extract the gas in the permeation chamber before the permeation test starts, until the pressure in the first space and the second space is respectively less than or equal to a preset vacuum degree; When the pressures in the first space and the second space are respectively less than or equal to a preset vacuum degree, the gas source provides the target gas to the first space through the gas storage bottle.

8. The device according to claim 1, characterized in that For the same sheet thickness, the plate permeability parameter in the mapping relationship data tends to be consistent with the mid-diameter corrected permeability parameter of the pipeline model; The infiltration parameter correction module is used to replace the initial infiltration parameter with the target plate infiltration parameter and use it as the target infiltration parameter.

9. The device according to claim 1, characterized in that The test sheet is verified by CT scanning to ensure that the test sheet meets the penetration test requirements.

10. A method for measuring pipeline gas permeability parameters, characterized in that: The method comprises: Performing a permeation test of a target gas on a test sheet of a specified thickness, measuring gas permeation parameters during the permeation test, and obtaining mapping relationship data between the test sheet thickness and the flat plate permeation parameters; Calculating the permeability parameters of a target pipeline model of target thickness to obtain initial permeability parameters of the target pipeline model; Matching and searching the mapping relationship data according to the target thickness to obtain the target plate penetration parameter corresponding to the target thickness; The initial permeability parameters are modified using the target plate permeability parameters to obtain the target permeability parameters of the target pipeline model.

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