Method for evaluating tightening force of pipe flange bolt set and related equipment

Abstract

The present application relates to the technical field of pipeline flange bolt connection, and particularly relates to a pipeline flange bolt group fastening force evaluation method and related equipment, wherein the pipeline flange bolt group fastening force evaluation method comprises: obtaining the working condition of the bolt group; when the working environment of the bolt group is an operation working condition, obtaining the first minimum load of the bolt group; when the working environment of the bolt group is a water pressure test working condition, obtaining the second minimum load of the bolt group; selecting the maximum value in the first minimum load and the second minimum load as the minimum fastening force of the bolt group. The stress conditions of the pipeline flange bolt under different working conditions are considered, the maximum value in the minimum loads of the bolt group under different working conditions is selected as the minimum fastening force of the bolt group, and thus the sealing performance of the flange under any working condition is ensured to be good.

Description

Technical Field

[0001] This invention relates to the technical field of pipe flange bolt connections, specifically a method for evaluating the tightening force of pipe flange bolt assemblies and related equipment. Background Technology

[0002] Currently, the assessment methods for bolt tightening force of pipe flanges are not comprehensive enough, leading to situations such as insufficient tightening force, loose connections, or excessive tightening force, resulting in gasket crushing.

[0003] Therefore, it is necessary to propose a method for evaluating the tightening force of pipe flange bolt assemblies, which has at least partially solved the problems existing in the prior art. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, in a first aspect, the present invention proposes a method for evaluating the tightening force of pipe flange bolt assemblies, the method comprising:

[0006] Obtain the working condition of the bolt group;

[0007] When the working environment of the above bolt group is the operating condition, obtain the first minimum load of the above bolt group;

[0008] When the working environment of the above bolt group is a hydrostatic test condition, obtain the second minimum load of the above bolt group;

[0009] The maximum value of the first minimum load and the second minimum load is selected as the minimum tightening force of the bolt group.

[0010] Optionally, the above-mentioned method for evaluating the fastening force of the pipe flange bolt group also includes: obtaining the bolt group load required for gasket crushing;

[0011] The maximum tightening force of the bolt group is determined based on the load required for the crushing of the gasket.

[0012] The range of tightening forces for the bolt groups during construction is determined based on the minimum and maximum tightening forces of the bolt groups.

[0013] Optionally, the steps for obtaining the first minimum load on the bolt group when the working environment of the bolt group is the operating condition include:

[0014] The third minimum load required by the above-mentioned flange bolt group under the operating conditions, and the fourth minimum load required by the above-mentioned bolt group and the above-mentioned flange when thermal expansion and contraction occur, wherein the above-mentioned flange is the flange that bears the first axial force, the first external bending moment and the internal pressure under the above-mentioned operating conditions.

[0015] Based on the third minimum load and the fourth minimum load mentioned above, the first minimum load under the operating conditions is determined.

[0016] Optionally, the steps for obtaining the third minimum load mentioned above include:

[0017] Obtain the first applied bending moment data and the first applied axial force data of the above bolt group;

[0018] Based on the aforementioned first external bending moment data and the aforementioned first external axial force data, the aforementioned third minimum load is determined.

[0019] Optionally, the steps for obtaining the fourth minimum load mentioned above include:

[0020] Obtain the thermal expansion data of the bolt group relative to the flange at the design temperature and the number of bolts in the bolt group;

[0021] The fourth minimum load is determined based on the thermal expansion data of the flange and the number of bolts in the bolt group.

[0022] Optionally, when the working environment of the bolt group is a hydrostatic test condition, the step of obtaining the second minimum load of the bolt group includes:

[0023] Obtain the minimum bolt load data required for the above-mentioned flange, wherein the above-mentioned flange is the flange that bears the second axial force, the second applied bending moment and the water pressure test pressure under the above-mentioned water pressure test conditions;

[0024] The second minimum load is determined based on the minimum bolt group load data required for the flange.

[0025] Optionally, the step of obtaining the fifth minimum load required for the flange mentioned above includes:

[0026] Acquire the data of the second applied bending moment, the second applied axial force, and the water pressure under the hydrostatic test conditions;

[0027] Based on the aforementioned second external bending moment data, the aforementioned second external axial force data, and the aforementioned hydrostatic test pressure data, the fifth minimum load required to obtain the aforementioned flange is determined.

[0028] Secondly, the present invention also provides a device for evaluating the tightening force of pipe flange bolt assemblies, comprising:

[0029] First acquisition unit: used to acquire the working conditions of the above bolt group;

[0030] Second acquisition unit: When the working environment of the above bolt group is the operating condition, it is used to acquire the first minimum load of the above bolt group;

[0031] The third acquisition unit is used to acquire the second minimum load of the bolt group when the working environment of the above bolt group is a hydrostatic test condition.

[0032] The judgment unit is used to select the maximum value of the first minimum load and the second minimum load as the minimum tightening force of the bolt group.

[0033] Thirdly, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of the method for evaluating the fastening force of a pipe flange bolt group as described in any of the first aspects above.

[0034] Fourthly, the present invention also proposes a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for evaluating the fastening force of the pipe flange bolt group according to any one of the preceding claims of the first aspect.

[0035] In summary, this invention obtains the working conditions of the bolt group. When the working environment of the bolt group is the operational condition, a first minimum load of the bolt group is obtained; when the working environment of the bolt group is the hydrostatic test condition, a second minimum load of the bolt group is obtained. The maximum value of the first minimum load and the second minimum load is selected as the minimum tightening force of the bolt group. By considering the stress situation of the pipe flange bolts under different working conditions and selecting the maximum value of the minimum load of the bolt group under different working conditions as the minimum tightening force of the bolt group, the present invention ensures good sealing performance of the flange under any working condition.

[0036] The method for evaluating the tightening force of pipe flange bolt assemblies according to the present invention, and other advantages, objectives and features of the present invention will be apparent in part from the following description, and in part from the understanding of those skilled in the art through study and practice of the present invention. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1A schematic diagram of a method for evaluating the fastening force of a pipe flange bolt group provided in this application embodiment;

[0039] Figure 2 A schematic diagram of a device for evaluating the fastening force of a pipe flange bolt group provided in this application embodiment;

[0040] Figure 3 This is a schematic diagram of an electronic device structure provided in an embodiment of this application. Detailed Implementation

[0041] This application provides a method and related equipment for evaluating the tightening force of a pipe flange bolt group. It takes into account the stress conditions of the pipe flange bolts under different working conditions, selects the maximum value among the minimum loads of the bolt group under different working conditions as the minimum tightening force of the bolt group, thereby ensuring good sealing performance of the flange under any working condition.

[0042] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The technical solutions of the embodiments of this application will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0043] Please see Figure 1 This is a schematic diagram of a method for evaluating the fastening force of a pipe flange bolt group, provided in an embodiment of this application. Specifically, it may include:

[0044] S110. Obtain the working conditions of the above bolt group;

[0045] Specifically, the actual working environment of the bolt group is determined, and the working condition of the bolt group is determined according to the working environment. When the working environment is in which a hydrostatic test is being conducted, the bolt group is in the hydrostatic test working condition. When the working environment is in which a hydrostatic test is not being conducted, the bolt group is in the operating working condition.

[0046] S120. When the working environment of the above bolt group is the operating condition, obtain the first minimum load of the above bolt group.

[0047] Specifically, after determining that the working environment of the bolt group is the operating condition, the minimum load of the bolt group under the operating condition is obtained as the first minimum load based on the working characteristics of the operating condition.

[0048] S130. When the working environment of the above bolt group is a hydrostatic test condition, obtain the second minimum load of the above bolt group.

[0049] Specifically, after determining that the working environment of the above bolt group is the hydrostatic test condition, the minimum load of the above bolt group under the hydrostatic test condition is obtained as the second minimum load based on the working characteristics of the hydrostatic test condition.

[0050] S140. Select the maximum value of the first minimum load and the second minimum load as the minimum tightening force of the bolt group.

[0051] Specifically, the first minimum load obtained by the above bolt group under operating conditions is compared with the second minimum load obtained under hydrostatic test conditions, and the maximum value is selected as the minimum tightening force of the above bolt group, so that the flange can ensure good sealing performance under any operating conditions.

[0052] In some examples, the method for evaluating the tightening force of the aforementioned pipe flange bolt group further includes: obtaining the bolt group load required for gasket crushing; determining the maximum tightening force of the bolt group based on the bolt group load required for gasket crushing; and determining the range of bolt group tightening forces to be selected during construction based on the minimum and maximum tightening forces of the bolt group.

[0053] Specifically, the maximum tightening force of the bolt group is determined by the load of the bolt group required to crush the gasket. The actual tightening force range of the bolt group during normal temperature construction is determined by the minimum and maximum tightening forces of the bolt group. During construction, the tightening force of the bolts only needs to be selected within the tightening force range to ensure good sealing of the flange under any working condition, while ensuring that the gasket, bolt group and flange will not fail.

[0054] Furthermore, in order to better determine the maximum tightening force of the bolt group, it is also necessary to consider the yield load of the bolt group and the maximum allowable bolt group load of the flange, and select the minimum value among the bolt load required for gasket crushing, the yield load of the bolt group, and the maximum allowable bolt group load of the flange as the maximum load of the bolt group, so as to ensure that the gasket, bolt group, and flange will not fail under any circumstances.

[0055] Specifically, the formula for calculating the gasket clamping force when the gasket is crushed is as follows:

[0056]

[0057] in, For the crushing load of the gasket, The crush strength of the gasket can be selected based on the type of gasket. For example, at room temperature, a spiral wound gasket with an outer ring... Value 125MPa, with inner and outer ring wound gaskets With a value of 311 MPa, the metal ring gasket does not need to be considered for crushing.

[0058] The bolt load to prevent the gasket from crushing is ,

[0059] The formula for calculating the yield load of a bolt group is:

[0060]

[0061] Where Wy is the yield load of the bolt group. The area at the root of a single stud. denoted as σy, where σy is the yield strength of a single bolt, and n is the number of bolts in the bolt group.

[0062] And obtain the maximum allowable bolt load of the flange, calculated using the following formula:

[0063] in, Here, n represents the maximum allowable bolt group load on the flange, and n is the number of bolts in the bolt group. The maximum allowable bolt stress for the flange. This represents the area at the root of a single stud.

[0064] In some examples, the steps for obtaining the first minimum load on the bolt group when the working environment of the bolt group is the operating condition include:

[0065] The third minimum load required by the above-mentioned flange bolt group under the operating conditions, and the fourth minimum load required by the above-mentioned bolt group and the above-mentioned flange when thermal expansion and contraction occur, wherein the above-mentioned flange is the flange that bears the first axial force, the first external bending moment and the internal pressure under the above-mentioned operating conditions.

[0066] Based on the third minimum load and the fourth minimum load mentioned above, the first minimum load under the operating conditions is determined.

[0067] Specifically, when obtaining the first minimum load of the bolt group, the third minimum load required by the flange and the fourth minimum load required due to thermal expansion and contraction of the flange should be taken into account. The first minimum load of the bolt group is determined based on the third minimum load and the fourth minimum load. In this way, the influence of axial force and bending moment applied by the pipeline system where the pipeline flange is located is taken into account, as well as the influence of thermal expansion of the bolts and flange, making the determined first minimum load of the bolt group more accurate, and further ensuring that the flange can still have good sealing performance under various influences.

[0068] Furthermore, in order to better determine the first minimum load of the above bolt group, it is also necessary to consider the sixth minimum load required for the gasket seal under operating conditions, specifically:

[0069] =

[0070] in, For the first minimum load, The third minimum load, The fourth minimum load, It is the sixth minimum load.

[0071] Furthermore, the formula for calculating the sixth minimum load is:

[0072]

[0073] in, This refers to the minimum shim clamping force required under operating conditions.

[0074] In some examples, the steps for obtaining the third minimum load required for the flange include:

[0075] Obtain the first applied bending moment data and the first applied axial force data of the above bolt group;

[0076] Based on the aforementioned first external bending moment data and the aforementioned first external axial force data, the aforementioned third minimum load is determined.

[0077] Specifically, the formula for calculating the third minimum load is:

[0078]

[0079] in, The diameter of the center circle of the gasket contact surface. This represents the equivalent stress of the flange.

[0080] Furthermore, the formula for calculating the equivalent stress of the flange is:

[0081]

[0082] Where M is the first applied bending moment. Let P be the first applied axial force and P be the flange design pressure. The resulting third minimum load takes into account the effects of axial force and bending moment applied by the piping system containing the flange, making the first minimum load of the bolt group determined based on the third minimum load more accurate. This further ensures that the flange maintains good sealing performance under various influences.

[0083] In some examples, the steps described above for obtaining the fourth minimum load required for the thermal expansion and contraction of the bolt group and the flange include:

[0084] Obtain the thermal expansion data of the bolt group relative to the flange at the design temperature and the number of bolts in the bolt group;

[0085] The fourth minimum load is determined based on the thermal expansion data of the flange and the number of bolts in the bolt group.

[0086] Specifically, the formula for calculating the fourth minimum load is:

[0087]

[0088] in, This is the amount of thermal expansion of the bolt relative to the flange at the design temperature. For effective bolt length, This is the elastic modulus of the bolt material.

[0089] Furthermore, The calculation formula is:

[0090]

[0091] in, This is the amount of thermal expansion of the bolt at the design temperature. This refers to the thermal expansion of the flange at the design temperature. It can be understood that when the thermal expansion of the bolts at the design temperature is greater than the thermal expansion of the flange at the design temperature,... >0, when the thermal expansion of the bolt at the design temperature is less than the thermal expansion of the flange at the design temperature. <0. The influence of thermal expansion of bolts and flanges is taken into account, making the first minimum load of the bolt group determined according to the fourth minimum load more accurate, further ensuring that the flange can still have good sealing performance under various influences.

[0092] In some examples, when the working environment of the bolt group is a hydrostatic test condition, the steps for obtaining the second minimum load of the bolt group include:

[0093] The minimum fifth load required to obtain the above flange, wherein the above flange is the flange that bears the second axial force, the second external bending moment and the water pressure test pressure under the above water pressure test conditions;

[0094] The second minimum load is determined based on the fifth minimum load required for the flange.

[0095] Specifically, when determining the second minimum load, the effects of the axial force, bending moment, and hydrostatic test pressure applied to the pipeline system where the flange is located under the hydrostatic test conditions were taken into account, making the determined second minimum load of the bolt group more accurate. Then, compared with the first minimum load, the maximum value was selected as the minimum tightening force of the above bolt group, ensuring that the flange can still have good sealing performance under various influences.

[0096] Furthermore, in order to better determine the second minimum load of the above bolt group, it is also necessary to consider the seventh minimum load required for the gasket seal under hydrostatic test conditions.

[0097] Specifically, the formula for calculating the second minimum load of the above bolt group under the hydrostatic test condition is as follows:

[0098]

[0099] in, The second minimum load, The fifth minimum load, It is the seventh minimum load.

[0100] Furthermore, the formula for calculating the seventh minimum load is:

[0101]

[0102] in, This is the minimum gasket clamping force required under hydrostatic testing conditions. This represents the equivalent stress of the flange under hydrostatic testing conditions.

[0103] In some examples, the step of obtaining the fifth minimum load required for the flange includes:

[0104] Acquire the data of the second applied bending moment, the second applied axial force, and the water pressure under the hydrostatic test conditions;

[0105] Based on the aforementioned second external bending moment data, the aforementioned second external axial force data, and the aforementioned hydrostatic test pressure data, the fifth minimum load required to obtain the aforementioned flange is determined.

[0106] Specifically, the formula for calculating the fifth minimum load is:

[0107]

[0108] in, This represents the equivalent stress of the flange under hydrostatic testing conditions.

[0109] Specifically, the formula for calculating the equivalent stress of the flange under hydrostatic testing conditions is as follows:

[0110]

[0111] in, For the second applied bending moment, For the second external axial force, The fifth minimum load, calculated based on the design pressure of the flange for the hydrostatic test, takes into account the influence of axial force and bending moment applied by the pipeline system where the flange is located during the hydrostatic test. This makes the second minimum load of the bolt group determined based on the fifth minimum load more accurate. Furthermore, by comparing it with the first minimum load, the maximum value is selected as the minimum tightening force of the bolt group, further ensuring that the flange still has good sealing performance under various influences.

[0112] It is understandable that the bolt group tightening force obtained above is a theoretical tightening force. In actual use, the influence of bolt dispersion on the bolt group tightening force must also be considered. >0, meaning when the thermal expansion of the bolt at the design temperature is greater than the thermal expansion of the flange at the design temperature.

[0113]

[0114] in, This represents the maximum tightening force of the bolt assembly during actual use. This represents the maximum tightening force of the bolt group under theoretical conditions. This represents the allowable stress of the bolt at room temperature. This refers to the allowable stress of the bolt at the design temperature. This represents the positive dispersion of the bolt group.

[0115] Furthermore, the formula for calculating the positive dispersion of the bolt group is:

[0116]

[0117] in, This represents the positive dispersion of a single bolt in the bolt group.

[0118] when 0, meaning when the thermal expansion of the bolt at the design temperature is greater than the thermal expansion of the flange at the design temperature.

[0119]

[0120] In practical use, the formula for calculating the minimum tightening force of a bolt group is:

[0121]

[0122] in, This represents the maximum tightening force of the bolt assembly during actual use. W represents the maximum tightening force of the bolt group under theoretical conditions, and W represents the design load of the bolt group under operating conditions, i.e., the bolt group load required under operating conditions calculated according to GB150. The negative dispersion of the bolt group.

[0123] Furthermore, the formula for calculating the negative dispersion of the bolt group is:

[0124]

[0125] in, This represents the negative dispersion of a single bolt in the bolt group.

[0126] The minimum and maximum tightening forces obtained from this determine the range of tightening forces to be selected under actual use conditions. By selecting the tightening force of the bolt group within this range, the sealing performance of the flange can be guaranteed under any working condition, while ensuring that the gasket, bolt group and flange will not fail.

[0127] Furthermore, the tightening force and preload torque of a single bolt can be determined based on the bolt group tightening force selected within the tightening force range under actual use conditions and the number of bolts in the bolt group.

[0128] The formula for calculating the tightening force of a single bolt is as follows:

[0129]

[0130] in, The bolt group tightening force is selected within the range of tightening forces used in actual applications, where F is the tightening force of a single bolt.

[0131] The formula for calculating the preload torque of a single bolt is as follows:

[0132]

[0133] Where T is the preload torque of a single bolt, K is the nut coefficient, and d is the nominal diameter of the bolt.

[0134] Please see Figure 2 , Figure 2 A schematic diagram of a device for evaluating the fastening force of a pipe flange bolt group provided in this application embodiment;

[0135] First acquisition unit: used to acquire the working condition of the bolt group;

[0136] Second acquisition unit: When the working environment of the bolt group is the operating condition, it is used to acquire the first minimum load of the bolt group;

[0137] The third acquisition unit is used to acquire the second minimum load of the bolt group when the working environment of the bolt group is a hydrostatic test condition.

[0138] The judgment unit is used to select the maximum value of the first minimum load and the second minimum load as the minimum tightening force of the bolt group.

[0139] Please see Figure 3 , Figure 3 This is a schematic diagram of an electronic device structure provided in an embodiment of this application.

[0140] This application also provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 320 and executable on the processor. When the processor 320 executes the computer program 311, it implements the steps of any of the above-mentioned methods for evaluating the fastening force of the pipe flange bolt group.

[0141] Since the electronic device described in this embodiment is the device used to implement the pipe flange bolt group fastening force evaluation device in the embodiment of this application, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the method described in the embodiment of this application. Therefore, how the electronic device implements the method in the embodiment of this application will not be described in detail here. Any device used by those skilled in the art to implement the method in the embodiment of this application is within the scope of protection of this application.

[0142] In practical implementation, when the computer program 311 is executed by the processor, it can achieve the following: Figure 1 Any of the corresponding implementation methods in the embodiments.

[0143] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0144] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0145] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0146] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0147] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0148] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform actions such as... Figure 1 The process of determining the target trajectory based on the mobile platform in the corresponding embodiment.

[0149] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0150] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0151] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0152] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0153] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0154] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0155] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for evaluating the tightening force of pipe flange bolt assemblies, characterized in that, include: Obtain the working condition of the bolt group; When the working environment of the bolt group is the operating condition, obtain the first minimum load of the bolt group; When the working environment of the bolt group is a hydrostatic test condition, obtaining the second minimum load of the bolt group includes: obtaining the fifth minimum load required by the flange, wherein the flange is a flange that bears a second axial force, a second applied bending moment, and a hydrostatic test pressure under the hydrostatic test condition; determining the second minimum load based on the fifth minimum load required by the flange, the step of obtaining the fifth minimum load required by the flange includes: obtaining the second applied bending moment data, the second applied axial force data, and the hydrostatic test pressure data under the hydrostatic test condition; determining the fifth minimum load required by the flange based on the second applied bending moment data, the second applied axial force data, and the hydrostatic test pressure data; The maximum value between the first minimum load and the second minimum load is selected as the minimum tightening force of the bolt group.

2. The method for evaluating the tightening force of pipe flange bolt assemblies according to claim 1, characterized in that, Also includes: Obtain the bolt group load required for gasket crushing; The maximum tightening force of the bolt group is determined based on the bolt group load required to crush the gasket. The range of tightening force for the bolt group during construction is determined based on the minimum and maximum tightening forces of the bolt group.

3. The method for evaluating the tightening force of pipe flange bolt assemblies according to claim 1, characterized in that, The step of obtaining the first minimum load of the bolt group when the working environment of the bolt group is the operating condition includes: The third minimum load required by the flange bolt group under the operating condition and the fourth minimum load required by the bolt group and the flange under thermal expansion and contraction are obtained, wherein the flange is the flange that bears the first axial force, the first external bending moment and the internal pressure under the operating condition. The first minimum load under operating conditions is determined based on the third minimum load and the fourth minimum load.

4. The method for evaluating the tightening force of pipe flange bolt assemblies according to claim 3, characterized in that, The step of obtaining the third minimum load includes: Acquire the first applied bending moment data and the first applied axial force data of the bolt group; The third minimum load is determined based on the first applied bending moment data and the first applied axial force data.

5. The method for evaluating the tightening force of pipe flange bolt assemblies according to claim 3, characterized in that, The step of obtaining the fourth minimum load includes: Obtain the thermal expansion data of the bolt group relative to the flange at the design temperature and the number of bolts in the bolt group; The fourth minimum load is determined based on the thermal expansion data of the flange and the number of bolts in the bolt group.

6. A device for evaluating the tightening force of pipe flange bolt assemblies, characterized in that, include: First acquisition unit: used to acquire the working condition of the bolt group; Second acquisition unit: When the working environment of the bolt group is the operating condition, it is used to acquire the first minimum load of the bolt group; The third acquisition unit: When the working environment of the bolt group is a hydrostatic test condition, it is used to acquire the second minimum load of the bolt group, including: acquiring the fifth minimum load required by the flange, wherein the flange is a flange that bears a second axial force, a second applied bending moment, and a hydrostatic test pressure under the hydrostatic test condition; determining the second minimum load based on the fifth minimum load required by the flange, the step of acquiring the fifth minimum load required by the flange includes: acquiring the second applied bending moment data, the second applied axial force data, and the hydrostatic test pressure data under the hydrostatic test condition; determining the fifth minimum load required by the flange based on the second applied bending moment data, the second applied axial force data, and the hydrostatic test pressure data; The judgment unit is used to select the maximum value of the first minimum load and the second minimum load as the minimum tightening force of the bolt group.

7. An electronic device, comprising: The memory, the processor, and the computer program stored in the memory and executable on the processor are characterized in that the processor, when executing the computer program stored in the memory, implements the steps of the method for evaluating the fastening force of a pipe flange bolt group as claimed in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the method for evaluating the fastening force of the pipe flange bolt group as described in any one of claims 1-5.

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