Method and device for calculating hydrogen leakage rate of steel screwed joint under pure hydrogen condition

Abstract

The invention relates to a method and device for calculating the hydrogen leakage rate of a steel threaded connector under the pure hydrogen condition, and the method comprises the steps: obtaining the first pressure of a leakage main channel corresponding to a to-be-processed pipeline and the second pressure of a leakage auxiliary channel corresponding to the to-be-processed pipeline, and according to the first pressure, the second pressure, the magnitude of interference of the sealing surface, the surface roughness, the maximum aperture, the area of each hole, the pore space fractal dimension and the pore space characteristic scale, determining a first leakage rate corresponding to the leakage main channel and a second leakage rate corresponding to the leakage auxiliary channel. By means of the method, the main leakage channel and the auxiliary leakage channel corresponding to the threaded connector are calculated, the method can adapt to threaded connectors of different types, specifications and using conditions, calculation is easy and convenient, accuracy is high, engineering technicians can rapidly and accurately calculate the leakage amount, working efficiency is improved, and the method is suitable for popularization and application. Therefore, the leakage risk is accurately predicted and controlled, and the safety and economy of hydrogen storage and transportation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of methods for calculating the sealing leakage of key connecting components of oil and gas pipelines, and in particular to a method and device for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions. Background Art

[0002] Mixing hydrogen with natural gas and transporting it using existing natural gas pipelines and their distribution networks is currently the best potential way to achieve safe, efficient, large-scale and long-distance hydrogen transportation to end users. Due to the different physical and chemical properties of hydrogen and natural gas, the introduction of hydrogen into the existing natural gas transmission and distribution pipelines will bring more serious hydrogen damage problems such as hydrogen embrittlement of steel materials, resulting in a series of safety impacts such as failure of airtightness of steel components and pipeline leakage. Steel threaded joints are key connecting components of natural gas transmission and distribution pipelines and are widely used in the connection of various components of hydrogen systems, including pipelines, storage tanks, valves, etc. Their main function is to ensure the sealing and connection strength of various parts of the system. However, due to the possible errors in the processing and installation of threaded joints and the strong penetration ability of hydrogen molecules, the sealing of threaded joints often becomes a weak link in system leakage, and its sealing is crucial to the safe operation of the system. Due to its metal-to-metal contact sealing structure, it is easier to generate hydrogen aggregation in a hydrogen environment, causing the expansion of the original microscopic leakage channel, and even fracture at the joint, which ultimately leads to failure of airtightness of steel threaded joints. Therefore, accurately calculating the hydrogen leakage of steel threaded joints under pure hydrogen conditions is of great significance to ensure the safe operation of hydrogen pipelines.

[0003] As a high-energy-density fuel, hydrogen has broad application prospects. However, hydrogen is an extremely flammable and explosive gas. Hydrogen leakage may cause serious safety hazards and may lead to fire or explosion. As an important component in the hydrogen system, the sealing of threaded joints is crucial to the safety of the system. Providing a scientific and systematic leakage calculation method can help companies and engineers better conduct risk assessment and management and prevent potential accidents. By predicting and controlling leakage risks in advance, the probability of accidents can be effectively reduced, the safety of personnel and equipment can be guaranteed, the safe operation of the hydrogen energy system can be ensured, the safety level of the entire hydrogen system can be improved, and social benefits can be achieved.

[0004] The development of hydrogen energy technology has put forward higher requirements for the leakage calculation of threaded joints. However, due to the special small volume and low density characteristics of hydrogen, the existing leakage calculation methods have problems such as insufficient accuracy and limited scope of application. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions, aiming to solve at least one of the above technical problems.

[0006] In the first aspect, the technical solution of the present invention to solve the above technical problem is as follows: a method for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions, the method comprising:

[0007] Obtaining a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel on a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint;

[0008] Obtain the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space;

[0009] According to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space, the first leakage amount corresponding to the main leakage channel and the second leakage amount corresponding to the secondary leakage channel are determined.

[0010] The beneficial effects of the present invention are as follows: the present solution calculates the main and auxiliary leakage channels corresponding to the threaded joint, and can adapt to threaded joints of different types, specifications and use conditions, and the calculation is simple and accurate, so that engineering and technical personnel can quickly and accurately calculate the leakage amount, improve work efficiency, and thus accurately predict and control leakage risks, and improve the safety and economy of hydrogen storage and transportation. At the same time, with the rapid development of the hydrogen energy industry, unified technical standards and specifications have become particularly important. The higher-precision leakage calculation method provided by the present invention can provide a scientific basis for the formulation of relevant technical standards and specifications, and promote the standardization and normalization of the hydrogen energy industry.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the method further comprises:

[0013] The total leakage amount of the pipeline to be processed is determined according to the first leakage amount and the second leakage amount.

[0014] Further, the first leakage amount corresponding to the main leakage channel and the second leakage amount corresponding to the secondary leakage channel are determined according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space, including:

[0015] Determining the rough surface fractal dimension and the rough surface characteristic scale corresponding to the steel threaded joint according to the surface roughness;

[0016] Determine the first leakage amount according to the first pressure, the second pressure, the sealing surface interference, the rough surface fractal dimension, the pore space fractal dimension, the maximum hole area among the hole areas, and the rough surface characteristic scale;

[0017] The second leakage amount is determined according to the first pressure, the second pressure, the fractal dimension of the pore space, the characteristic scale of the pore space and the maximum pore diameter.

[0018] Furthermore, the sealing surface interference is determined based on the following method:

[0019] Obtaining the inner diameter and outer diameter of the steel threaded joint;

[0020] The difference between the inner diameter and the outer diameter is determined as the sealing surface interference.

[0021] In a second aspect, in order to solve the above technical problems, the present invention also provides a device for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions, the device comprising:

[0022] A first acquisition module is used to acquire a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel of a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint;

[0023] The second acquisition module is used to obtain the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after the microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space;

[0024] A leakage determination module is used to determine a first leakage amount corresponding to the main leakage channel and a second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space.

[0025] In the third aspect, in order to solve the above-mentioned technical problems, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for calculating the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions of the present application is implemented.

[0026] In a fourth aspect, in order to solve the above-mentioned technical problem, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method for calculating the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions of the present application is implemented.

[0027] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0029] Figure 1 A schematic flow chart of a method for calculating hydrogen leakage of a steel threaded joint under pure hydrogen conditions provided by one embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the effect of a pressure difference on a theoretical calculated value of volume leakage provided by an embodiment of the present invention;

[0031] Figure 3 A schematic flow chart of a method for calculating hydrogen leakage of a steel threaded joint under pure hydrogen conditions provided by an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the structure of a device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions provided by one embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0036] The solution provided in the embodiment of the present invention can be applied to any application scenario where it is necessary to calculate the hydrogen leakage of a steel threaded joint under pure hydrogen conditions. The solution provided in the embodiment of the present invention can be executed by any electronic device, for example, it can be a user's terminal device, including at least one of the following: a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, a smart TV, and a smart car device.

[0037] The embodiment of the present invention provides a possible implementation method, such as Figure 1 As shown, a flow chart of a method for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions is provided. The scheme can be executed by any electronic device, for example, a terminal device, or a terminal device and a server. For the convenience of description, the method provided by the embodiment of the present invention will be described below by taking the terminal device as the execution subject as an example. Figure 1 The method may include the following steps:

[0038] Step S10, obtaining a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel on a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint;

[0039] Step S20, obtaining the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space;

[0040] Step S30, determining a first leakage amount corresponding to the main leakage channel and a second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space.

[0041] This solution calculates the main and auxiliary leakage channels corresponding to the threaded joints, and can adapt to threaded joints of different types, specifications and usage conditions. It is simple to calculate and has high accuracy, so that engineering and technical personnel can quickly and accurately calculate the leakage volume, improve work efficiency, and accurately predict and control leakage risks, and improve the safety and economy of hydrogen storage and transportation. At the same time, with the rapid development of the hydrogen energy industry, unified technical standards and specifications have become particularly important. The higher-precision leakage calculation method provided by the present invention can provide a scientific basis for the formulation of relevant technical standards and specifications, and promote the standardization and normalization of the hydrogen energy industry.

[0042] The scheme of the present invention is further described below in conjunction with the following specific embodiments. In this embodiment, see Figure 1 and Figure 3 , provides a method for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions, which may include the following steps:

[0043] Step S10, obtaining a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel on a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint;

[0044] The first pressure refers to the pressure on the main leakage channel, and the second pressure refers to the pressure on the secondary leakage channel. The main leakage channel refers to the leakage channel formed by the steel threaded joint, and the secondary leakage channel refers to the leakage channel formed by the microcracks on the surface of the coupling.

[0045] Step S20, obtaining the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space;

[0046] Among them, surface roughness refers to the unevenness of small spacing and tiny peaks and valleys on the machined surface of steel threaded joints;

[0047] The pore space refers to the void space inside the material of a steel threaded joint, and its characteristics have an important influence on the physical and chemical properties of the material;

[0048] The void area refers to the projected area of ​​tiny gaps, holes or depressions on the material or structural surface of a steel threaded joint;

[0049] The fractal dimension of pore space refers to the complexity and self-similarity of the pore structure of steel threaded joints at different scales;

[0050] The pore space characteristic scale refers to the key parameter that describes the geometric characteristics of the internal pore structure of the steel threaded joint material, which is used to quantify the size, shape, distribution and connectivity of the pores;

[0051] Optionally, the above sealing surface interference is determined based on the following method:

[0052] Obtaining the inner diameter and outer diameter of the steel threaded joint;

[0053] The difference between the inner diameter and the outer diameter is determined as the sealing surface interference.

[0054] Step S30, determining a first leakage amount corresponding to the main leakage channel and a second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space.

[0055] Optionally, a possible implementation scheme of the above step S30 is:

[0056] S301, determining a rough surface fractal dimension and a rough surface characteristic scale corresponding to the steel threaded joint according to the surface roughness;

[0057] Optionally, one possible implementation of S301 is as follows:

[0058] S3011, determining the fractal dimension of the rough surface according to the surface roughness by using a first formula, wherein the first formula is:

[0059] D s =1.78-0.35R a (1)

[0060] Among them, D s It represents the fractal dimension of the rough surface and is an important indicator of the surface roughness of steel threaded joints. It is used to quantify the geometric structure and morphology of the surface of an object. a Indicates surface roughness.

[0061] S3012, determining a rough surface characteristic scale according to the surface roughness by using a second formula, wherein the second formula is:

[0062] G=0.0175ln(R a )+0.1001(2)

[0063] Among them, G represents the rough surface characteristic scale, which refers to the parameter describing the surface micro-geometric characteristics of steel threaded joints and is used to characterize the irregularity and undulation of the surface.

[0064] The second formula characterizes the relationship between the fractal dimension of the rough surface, the surface roughness and the characteristic scale of the rough surface.

[0065] S302, determining the first leakage amount according to the first pressure, the second pressure, the interference of the sealing surface, the fractal dimension of the rough surface, the fractal dimension of the pore space, the maximum cavity area among the cavity areas, and the characteristic scale of the rough surface;

[0066] Optionally, one possible implementation of S302 is as follows:

[0067] The first leakage amount is determined by a third formula according to the first pressure, the second pressure, the sealing surface interference, the rough surface fractal dimension, the pore space fractal dimension, the maximum hole area among the hole areas, and the rough surface characteristic scale, wherein the third formula is:

[0068]

[0069] Among them, Q 主 Indicates the first leakage, P 1 Indicates the first pressure, the unit is Pa, P 2 represents the second pressure, in Pa, a represents the hole area of ​​any pore space, a max Indicates the maximum hole area in μm 2 ; r 2 Represents the outer diameter, r 1 Indicates the inner diameter, (r 2 -r 1 ) represents the interference of the sealing surface, in μm; D represents the fractal dimension of the pore space, which is usually 1.5 under pure hydrogen conditions; μ represents the dynamic viscosity, in Pa·s; D s represents the fractal dimension of the rough surface, and G represents the characteristic scale of the rough surface. q is the leakage of a single leakage channel (main leakage channel). The main leakage channel has multiple (n) single leakage channels. By integrating the leakage of the leakage channel on the entire contact sealing surface, the leakage of the main leakage channel on the entire sealing end surface can be obtained. 主 .

[0070] S303, determining the second leakage amount according to the first pressure, the second pressure, the fractal dimension of the pore space, the characteristic scale of the pore space and the maximum pore diameter.

[0071] Optionally, a possible implementation of S303 is as follows:

[0072] The second leakage amount is determined by a fourth formula according to the first pressure, the second pressure, the pore space fractal dimension, the pore space characteristic scale and the maximum pore diameter, wherein the fourth formula is:

[0073]

[0074] Among them, Q 副 represents the second leakage, λ max is the maximum pore size, in μm. G' is the characteristic dimension of the pore space.

[0075] In the present application, the first to fourth formulas are composed of analyzing the leakage process of hydrogen at the steel threaded joint, establishing a hydrogen leakage mechanism model, solving the established model, and establishing a theoretical calculation formula for the leakage amount of the main and secondary leakage channels. Among them, the analysis of the leakage process of hydrogen at the steel threaded joint provides a theoretical basis for establishing a hydrogen leakage mechanism model, and the leakage amount Q of the main and secondary leakage channels is obtained by solving the established hydrogen mechanism model. 主 (first leakage) and Q 副 (Second leakage amount) calculation formula.

[0076] Among them, the fractal dimension of the rough surface D s The surface roughness R of the thread contact surface determined by the machining accuracy of the steel threaded joint a It is determined that the fractal dimension D of the pore space is a unique constant of 1.5 under pure hydrogen conditions. The hole area a of the rough surface contact leakage channel is approximately equal to the square of the surface roughness scale G. The maximum pore size of the bundle capillary of the microcrack extension leakage channel is λ max According to the geometric features of the rough surface and pore space, it is generally believed that the maximum pore size is λ max The scale is approximately the surface roughness R a 10 times. 2 -r 1 ) can be expressed as the sealing interference on the sealing contact surface of the steel threaded joint.

[0077] Optionally, the method further includes:

[0078] Step S40: determining the total leakage amount of the pipeline to be processed according to the first leakage amount and the second leakage amount.

[0079] Specifically, the sum of the first leakage amount and the second leakage amount is determined as the total leakage amount. The total leakage amount can be calculated based on a coupled hydrogen leakage theory calculation formula.

[0080] In order to better illustrate and understand the principle of the method provided by the present invention, the scheme of the present invention is described below in conjunction with an optional specific embodiment. It should be noted that the specific implementation of each step in the specific embodiment should not be understood as a limitation to the scheme of the present invention. On the basis of the principle of the scheme provided by the present invention, other implementations that can be thought of by those skilled in the art should also be considered within the scope of protection of the present invention.

[0081] In this embodiment, the casing wall thickness is 9.19 mm, the main seal inclination angle is 15°, the total contact length of the main seal surface is 11.036 mm, the sealing surface roughness (surface roughness) is 0.1 (μm), the coupling surface is copper-plated and the steel threaded joint has undergone microcrack expansion, and pure hydrogen is used as an example to calculate the leakage amount, and the influence of pressure on the gas leakage rate is analyzed.

[0082] The parameters required for the calculation process are shown in Table 1.

[0083] Table 1 Leakage theoretical calculation parameters

[0084]

[0085] According to the above parameters, the leakage of fluid medium at the steel special threaded joint is theoretically calculated (taking pure hydrogen as an example). The calculation results are shown in Table 2 below.

[0086] Table 2 Leakage theoretical calculation results

[0087]

[0088] The pressure difference refers to the difference between the first pressure and the second pressure. According to the calculation result table, the change of the total volume leakage of the main and auxiliary leakage channels with the pressure difference is analyzed, and a line graph is drawn as follows Figure 2 .

[0089] From the theoretical calculation results, it is obvious that the leakage amount calculated theoretically for both the main leakage channel of the rough surface contact and the secondary leakage channel of the microcrack extension increases with the increase of the pressure difference, and the total volume leakage (total leakage) also conforms to this law. In addition, in comparison between the first leakage amount and the second leakage amount, the theoretical calculation amount of the secondary leakage channel is significantly greater than the theoretical calculation value of the main leakage channel, which well illustrates that under the condition that the hydrogen microcrack extension leakage channel has been generated, the hydrogen microcrack extension leakage channel is the main factor affecting the volume leakage at the steel threaded joint. This also indirectly shows that the extension of hydrogen-induced microcracks has a significant impact on the airtightness of the steel threaded joint, which is consistent with the analysis of the leakage process of hydrogen at the special steel threaded joint, and can prove the accuracy and feasibility of this calculation method.

[0090] Therefore, the solution of the present invention has the following beneficial effects:

[0091] This scheme fully considers the two key factors affecting leakage under pure hydrogen conditions, namely the main leakage channel of the rough surface contact of the steel thread and the secondary leakage channel of microcrack extension. Through the similarity analysis of the two channels, the leakage calculation formula of hydrogen in the main and secondary channels of the steel thread is derived, which provides a theoretical basis for accurately calculating the hydrogen leakage at the steel thread joint under pure hydrogen conditions.

[0092] This scheme is mainly applicable to calculating the hydrogen leakage at threaded joints under pure hydrogen conditions, including threaded joints in hydrogen storage and transportation systems, equipment and pipeline systems for pure hydrogen gas production and use, and test equipment for studying hydrogen characteristics. By accurately calculating the leakage of threaded joints under pure hydrogen conditions, potential leakage points can be predicted in advance, reducing the risk of hydrogen leakage, which is conducive to designing more reliable threaded joints, reducing or avoiding leakage, improving the sealing performance and durability of the system, improving the sealing of the system, and reducing operating costs. It can also provide a basis for the formulation of relevant technical standards and regulations.

[0093] Based on Figure 1 Based on the same principle as the method shown in , the embodiment of the present invention also provides a device 20 for calculating the hydrogen leakage of a steel threaded joint under pure hydrogen conditions, such as Figure 4 As shown in , the calculation device 20 of the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions may include a first acquisition module 210, a second acquisition module 220 and a leakage amount determination module 230, wherein:

[0094] A first acquisition module 210 is used to acquire a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel of a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint;

[0095] The second acquisition module 220 is used to obtain the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after the microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space;

[0096] The leakage amount determination module 230 is used to determine the first leakage amount corresponding to the main leakage channel and the second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space.

[0097] Optionally, the device further comprises:

[0098] The total leakage amount determination module is used to determine the total leakage amount of the pipeline to be processed according to the first leakage amount and the second leakage amount.

[0099] Optionally, when the leakage amount determination module determines the first leakage amount corresponding to the main leakage channel and the second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space, and the characteristic scale of the pore space, the leakage amount determination module is specifically used to:

[0100] Determining the rough surface fractal dimension and the rough surface characteristic scale corresponding to the steel threaded joint according to the surface roughness;

[0101] Determine the first leakage amount according to the first pressure, the second pressure, the sealing surface interference, the rough surface fractal dimension, the pore space fractal dimension, the maximum hole area among the hole areas, and the rough surface characteristic scale;

[0102] The second leakage amount is determined according to the first pressure, the second pressure, the fractal dimension of the pore space, the characteristic scale of the pore space and the maximum pore diameter.

[0103] Optionally, the sealing surface interference is determined based on the following method:

[0104] Obtaining the inner diameter and outer diameter of the steel threaded joint;

[0105] The difference between the inner diameter and the outer diameter is determined as the sealing surface interference.

[0106] The device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions in an embodiment of the present invention can execute the method for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions provided in an embodiment of the present invention, and its implementation principle is similar. The actions performed by each module and unit in the device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions in each embodiment of the present invention correspond to the steps in the method for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions in each embodiment of the present invention. For the detailed functional description of each module of the device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions, please refer to the description of the corresponding method for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions shown in the previous text, which will not be repeated here.

[0107] Among them, the calculation device for the hydrogen leakage amount of the above-mentioned steel threaded joint under pure hydrogen conditions can be a computer program (including program code) running in a computer device. For example, the calculation device for the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions is an application software; the device can be used to execute the corresponding steps in the method provided in the embodiment of the present invention.

[0108] In some embodiments, the device for calculating the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions provided in the embodiment of the present invention can be implemented in a combination of software and hardware. As an example, the device for calculating the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions provided in the embodiment of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the calculation method of the hydrogen leakage amount of the steel threaded joint under pure hydrogen conditions provided in the embodiment of the present invention. For example, the processor in the form of a hardware decoding processor can adopt one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs) or other electronic components.

[0109] In other embodiments, the device for calculating the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions provided by the embodiment of the present invention can be implemented in a software manner. Figure 4A calculation device for the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions stored in a memory is shown, which can be software in the form of a program and a plug-in, and includes a series of modules, including a first acquisition module 210, a second acquisition module 220 and a leakage amount determination module 230, which are used to implement the calculation method for the hydrogen leakage amount of a steel threaded joint under pure hydrogen conditions provided in an embodiment of the present invention.

[0110] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of a module does not limit the module itself in some cases.

[0111] Based on the same principle as the method shown in the embodiments of the present invention, an electronic device is also provided in the embodiments of the present invention, which may include but is not limited to: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the method shown in any embodiment of the present invention by calling the computer program.

[0112] In an alternative embodiment, an electronic device is provided, such as Figure 5 As shown, Figure 5 The electronic device 4000 shown includes: a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, such as through a bus 4002. Optionally, the electronic device 4000 may also include a transceiver 4004, which may be used for data interaction between the electronic device and other electronic devices, such as data transmission and / or data reception. It should be noted that in actual applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.

[0113] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. Processor 4001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0114] The bus 4002 may include a path to transmit information between the above components. The bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 4002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0115] The memory 4003 can be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.

[0116] The memory 4003 is used to store the application code (computer program) for executing the solution of the present invention, and the execution is controlled by the processor 4001. The processor 4001 is used to execute the application code stored in the memory 4003 to implement the content shown in the above method embodiment.

[0117] The electronic device may also be a terminal device. Figure 5 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0118] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer can execute the corresponding contents of the aforementioned method embodiment.

[0119] According to another aspect of the present invention, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being 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 methods provided in the implementation modes of the above-mentioned various embodiments.

[0120] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0121] It should be understood that the flow charts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the module, the program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0122] The computer-readable storage medium provided by the embodiment of the present invention may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0123] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device executes the method shown in the above embodiment.

[0124] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the disclosure scope involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) by each other.

Claims

1. A method for calculating hydrogen leakage of a steel threaded joint under pure hydrogen conditions, characterized in that: The following steps are involved: Obtaining a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel on a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint; Obtain the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space; According to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space, the first leakage amount corresponding to the main leakage channel and the second leakage amount corresponding to the secondary leakage channel are determined.

2. The method according to claim 1, characterized in that: The method further comprises: The total leakage amount of the pipeline to be processed is determined according to the first leakage amount and the second leakage amount.

3. The method according to claim 1, characterized in that Determining a first leakage amount corresponding to the main leakage channel and a second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space, and the characteristic scale of the pore space includes: Determining the rough surface fractal dimension and the rough surface characteristic scale corresponding to the steel threaded joint according to the surface roughness; Determine the first leakage amount according to the first pressure, the second pressure, the sealing surface interference, the rough surface fractal dimension, the pore space fractal dimension, the maximum hole area among the hole areas, and the rough surface characteristic scale; The second leakage amount is determined according to the first pressure, the second pressure, the fractal dimension of the pore space, the characteristic scale of the pore space and the maximum pore diameter.

4. The method according to any one of claims 1 to 3, characterized in that The sealing surface interference is determined based on the following method: Obtaining the inner diameter and outer diameter of the steel threaded joint; The difference between the inner diameter and the outer diameter is determined as the sealing surface interference.

5. A device for calculating hydrogen leakage of a steel threaded joint under pure hydrogen conditions, characterized in that: include: A first acquisition module is used to acquire a first pressure of a main leakage channel corresponding to the pipeline to be processed and a second pressure of a secondary leakage channel corresponding to the pipeline to be processed, wherein the pipeline to be processed is a pipeline for transmitting hydrogen, the main leakage channel is a leakage channel of a rough surface corresponding to the steel threaded joint, and the secondary leakage channel is a leakage channel formed after microcracks expand on the surface of the coupling between the pipeline to be processed and the steel threaded joint; The second acquisition module is used to obtain the interference of the sealing surface corresponding to the pipeline to be processed, the surface roughness of the thread contact surface corresponding to the steel threaded joint, the maximum pore size in the bundled capillary corresponding to the leakage secondary channel after the microcrack expansion, the hole area of ​​each pore space corresponding to the steel threaded joint, the fractal dimension of the pore space and the characteristic scale of the pore space; A leakage determination module is used to determine a first leakage amount corresponding to the main leakage channel and a second leakage amount corresponding to the secondary leakage channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space.

6. The device according to claim 5, characterized in that The device also includes: The total leakage amount determination module is used to determine the total leakage amount of the pipeline to be processed according to the first leakage amount and the second leakage amount.

7. The device according to claim 5, characterized in that The leakage amount determination module is specifically used to determine the first leakage amount corresponding to the leakage main channel and the second leakage amount corresponding to the leakage secondary channel according to the first pressure, the second pressure, the sealing surface interference, the surface roughness, the maximum pore size, the area of ​​each hole, the fractal dimension of the pore space and the characteristic scale of the pore space: Determining the rough surface fractal dimension and the rough surface characteristic scale corresponding to the steel threaded joint according to the surface roughness; Determine the first leakage amount according to the first pressure, the second pressure, the sealing surface interference, the rough surface fractal dimension, the pore space fractal dimension, the maximum hole area among the hole areas, and the rough surface characteristic scale; The second leakage amount is determined according to the first pressure, the second pressure, the fractal dimension of the pore space, the characteristic scale of the pore space and the maximum pore diameter.

8. The device according to any one of claims 5 to 7, characterized in that The sealing surface interference is determined based on the following method: Obtaining the inner diameter and outer diameter of the steel threaded joint; The difference between the inner diameter and the outer diameter is determined as the sealing surface interference.

9. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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