Creep crack detection method and system for high-temperature pipeline and computer equipment

Abstract

The invention provides a creep crack detection method and system for a high-temperature pipeline and computer equipment, and belongs to safety guarantee of a thermal power generation technology. The creep crack detection method for the high-temperature pipeline comprises the following steps: acquiring magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, magnetic disturbance characteristic parameters of the high-temperature pipeline without obvious creep damage and magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage in advance; obtaining a magnetic disturbance signal characteristic parameter curve and boundary values of the magnetic disturbance signal characteristic parameters according to the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameters of the high-temperature pipeline without obvious creep damage and the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage; and comparing the magnetic disturbance signal characteristic parameter of the to-be-detected high-temperature pipeline with the magnetic disturbance signal characteristic parameter curve and the boundary value of the magnetic disturbance signal characteristic parameter so as to determine whether the to-be-detected high-temperature pipeline has the IV-type crack or not.

Description

Technical Field

[0001] The present invention relates to the field of thermal power generation technology safety assurance, and in particular to a high-temperature pipeline creep crack detection method, a high-temperature pipeline creep crack detection system, a computer device and a computer-readable storage medium. Background Art

[0002] Coal-fired power units are moving towards the direction of ultra-supercritical high-parameter development, which puts higher requirements on the thermal strength and high-temperature oxidation resistance of boiler materials. Martensitic steels such as P91 and P92 with high thermal strength, good welding process performance and low price and Cr content of 9% to 12% are widely used in high-temperature pipelines of ultra-supercritical units. As the operating time of the unit increases, the pipes gradually age, and the metallographic structure and mechanical properties gradually decrease. However, for martensitic steels such as P91 and P92, the more serious thing is the generation of IV type cracks in the fine grain area of ​​the welded joint, and once formed, they expand rapidly, and even cause the entire circle of the welded joint to crack, which brings serious safety hazards to the unit.

[0003] The IV-type creep cracking process of martensitic heat-resistant steel welded joints is a creep damage process in the fine-grained zone of the welded joint. During the welding process, the carbides on the coarse austenite grain boundaries in the parent material are not completely dissolved, but precipitate on the grain boundaries of the fine-grained zone formed after welding. During the high-temperature creep process, the carbides that originally played a strengthening role in the fine-grained zone are reduced, while the carbides on the grain boundaries become larger and form new coarse carbides, which become the nucleation source of creep vacancies, resulting in a decrease in the creep performance of the fine-grained zone. When the creep vacancies on the grain boundaries increase, aggregate and connect, grain boundary separation will occur. As the separated grain boundaries continue to increase, microcracks are formed on the original austenite grain boundaries until macroscopic cracks occur, so it is necessary to detect IV-type cracks in high-temperature pipelines in advance to avoid accidents. Summary of the invention

[0004] In order to achieve the above-mentioned purpose, the present invention provides a creep crack detection method, system and computer equipment for a high-temperature pipeline. The creep crack detection method for a high-temperature pipeline predetermines a magnetic disturbance signal characteristic parameter curve and a boundary value of a magnetic disturbance signal characteristic parameter, performs magnetic measurement on a high-temperature pipeline to be detected, obtains the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected, and compares the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected with the magnetic disturbance signal characteristic parameter curve and the boundary value of the magnetic disturbance signal characteristic parameter, so as to achieve the purpose of discovering IV type cracks of the high-temperature pipeline in advance and avoid accidents.

[0005] A first aspect of the present invention provides a method for detecting creep cracks in a high-temperature pipeline, comprising: Pre-acquire the characteristic parameters of magnetic disturbances without creep damage, the characteristic parameters of magnetic disturbances with inconspicuous creep damage, and the characteristic parameters of magnetic disturbances with obvious creep damage of the high-temperature pipeline; According to the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameters of the high-temperature pipeline with insignificant creep damage, and the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage, a magnetic disturbance signal characteristic parameter curve and boundary values ​​of the magnetic disturbance signal characteristic parameters are obtained; Acquire characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected; The characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected are compared with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack.

[0006] In an embodiment of the present invention, the method of pre-acquiring characteristic parameters of magnetic disturbances of a high-temperature pipeline without creep damage, characteristic parameters of magnetic disturbances of a high-temperature pipeline with insignificant creep damage, and characteristic parameters of magnetic disturbances of a high-temperature pipeline with obvious creep damage comprises: Select high-temperature pipelines that have no creep damage, high-temperature pipelines that have insignificant creep damage, and high-temperature pipelines that have obvious creep damage; Conducting magnetic detection on the high-temperature pipeline without creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage; Conduct magnetic detection on the high-temperature pipeline with inconspicuous creep damage in advance to obtain the characteristic parameters of magnetic disturbance caused by the inconspicuous creep damage on the high-temperature pipeline; Conduct magnetic detection on the high-temperature pipeline with obvious creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage.

[0007] In the embodiment of the present invention, the step of pre-performing magnetic detection on the high-temperature pipeline without creep damage to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage includes: Performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain a first permanent magnetic disturbance signal; The characteristic data of the first permanent magnetic disturbance signal is extracted to obtain the characteristic parameters of the magnetic disturbance without creep damage to the high-temperature pipeline.

[0008] In an embodiment of the present invention, the step of performing magnetic detection on a high-temperature pipeline that has not incurred creep damage in advance to obtain a first permanent magnetic disturbance signal includes: Performing magnetic detection on a high-temperature pipeline that has not incurred creep damage according to a preset time interval, and obtaining a plurality of first real-time permanent magnetic disturbance data corresponding to a plurality of detection time points; The first permanent magnetic disturbance signal is determined according to a plurality of detection time points and a plurality of first real-time permanent magnetic disturbance data corresponding to the plurality of detection time points.

[0009] In the embodiment of the present invention, the selecting of the high-temperature pipeline without creep damage, the high-temperature pipeline with insignificant creep damage, and the high-temperature pipeline with obvious creep damage includes: Collect image information of multiple high-temperature pipelines at welding points; Using an image recognition algorithm to identify image information of the plurality of high-temperature pipelines at the welding locations, and obtaining crack information of each high-temperature pipeline at the welding location; According to the crack information of each high-temperature pipeline at the welding position, the high-temperature pipeline with no creep damage, the high-temperature pipeline with inconspicuous creep damage and the high-temperature pipeline with obvious creep damage are selected.

[0010] In an embodiment of the present invention, the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected are compared with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack, including: Determining whether the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal, the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is compared with the characteristic parameter curve of the magnetic disturbance signal to determine the crack degree of the IV type crack of the high-temperature pipeline to be detected; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is not within the boundary value of the characteristic parameter of the magnetic disturbance signal, it is determined that no IV type crack occurs in the high-temperature pipeline to be detected.

[0011] A second aspect of the present invention provides a creep crack detection system for a high temperature pipeline, the system comprising: A parameter acquisition unit, used to pre-acquire characteristic parameters of magnetic disturbances of a high-temperature pipeline without creep damage, characteristic parameters of magnetic disturbances of a high-temperature pipeline with inconspicuous creep damage, and characteristic parameters of magnetic disturbances of a high-temperature pipeline with obvious creep damage, and to acquire characteristic parameters of magnetic disturbance signals of the high-temperature pipeline to be detected; A parameter curve determination unit is used to obtain a magnetic disturbance signal characteristic parameter curve and a boundary value of the magnetic disturbance signal characteristic parameter according to the magnetic disturbance characteristic parameter of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameter of the high-temperature pipeline with inconspicuous creep damage, and the magnetic disturbance characteristic parameter of the high-temperature pipeline with obvious creep damage; The judgment unit is used to compare the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack.

[0012] In an embodiment of the present invention, the system further includes: The image recognition unit is used to recognize the collected image information of multiple high-temperature pipelines at the welding points, obtain the crack information of each high-temperature pipeline at the welding points, and select the high-temperature pipeline without creep damage, the high-temperature pipeline with inconspicuous creep damage, and the high-temperature pipeline with obvious creep damage according to the crack information of each high-temperature pipeline at the welding points.

[0013] A third aspect of the present invention provides a computer device, comprising: Memory; Processor; and Computer programs; The computer program is stored in a memory and is configured to be executed by a processor to implement the creep crack detection method for a high-temperature pipeline as described above.

[0014] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the creep crack detection method for a high-temperature pipeline as described above. The method for detecting type IV cracks in a high-temperature pipeline predetermines a magnetic disturbance signal characteristic parameter curve and a boundary value of a magnetic disturbance signal characteristic parameter, performs magnetic measurement on the high-temperature pipeline to be detected, obtains the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected, and compares the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected with the magnetic disturbance signal characteristic parameter curve and the boundary value of the magnetic disturbance signal characteristic parameter, so as to achieve the purpose of discovering type IV cracks in the high-temperature pipeline in advance and avoid accidents.

[0015] Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a flow chart of a creep crack detection method for a high temperature pipeline provided by an embodiment of the present invention; Figure 2 A creep crack detection system for a high-temperature pipeline is provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the process of realizing the present invention, the inventors found that coal-fired thermal power units are moving towards the direction of ultra-supercritical high-parameter development, which puts higher requirements on the thermal strength and high-temperature oxidation resistance of boiler materials. Martensitic steels such as P91 and P92 with high thermal strength, good welding process performance and low price and Cr content of 9% to 12% are widely used in high-temperature pipelines of ultra-supercritical units. As the running time of the unit increases, the pipes gradually age, and the metallographic structure and mechanical properties gradually decrease. However, for martensitic steels such as P91 and P92, the more serious thing is the generation of IV type cracks in the fine grain area of ​​the welded joint, and once formed, they expand rapidly, and even cause the entire circle of the welded joint to crack, which brings serious safety hazards to the unit.

[0022] The IV-type creep cracking process of martensitic heat-resistant steel welded joints is a creep damage process in the fine-grained zone of the welded joint. During the welding process, the carbides on the coarse austenite grain boundaries in the parent material are not completely dissolved, but precipitate on the grain boundaries of the fine-grained zone formed after welding. During the high-temperature creep process, the carbides that originally played a strengthening role in the fine-grained zone are reduced, while the carbides on the grain boundaries become larger and form new coarse carbides, which become the nucleation source of creep vacancies, resulting in a decrease in the creep performance of the fine-grained zone. When the creep vacancies on the grain boundaries increase, aggregate and connect, grain boundary separation will occur. As the separated grain boundaries continue to increase, microcracks are formed on the original austenite grain boundaries until macroscopic cracks occur, so it is necessary to detect IV-type cracks in high-temperature pipelines in advance to avoid accidents.

[0023] In view of the above problems, an embodiment of the present invention provides a creep crack detection method for a high-temperature pipeline, comprising: pre-acquiring magnetic disturbance characteristic parameters of a high-temperature pipeline without creep damage, magnetic disturbance characteristic parameters of a high-temperature pipeline with inconspicuous creep damage, and magnetic disturbance characteristic parameters of a high-temperature pipeline with obvious creep damage; obtaining a magnetic disturbance signal characteristic parameter curve and boundary values ​​of the magnetic disturbance signal characteristic parameters according to the acquired magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, magnetic disturbance characteristic parameters of a high-temperature pipeline with inconspicuous creep damage, and magnetic disturbance characteristic parameters of a high-temperature pipeline with obvious creep damage; acquiring magnetic disturbance signal characteristic parameters of a high-temperature pipeline to be detected, and comparing the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected with the magnetic disturbance signal characteristic parameter curve and the boundary values ​​of the magnetic disturbance signal characteristic parameters to determine whether a type IV crack occurs in the high-temperature pipeline to be detected. The creep crack detection method for high-temperature pipelines predetermines a magnetic disturbance signal characteristic parameter curve and a boundary value of a magnetic disturbance signal characteristic parameter, performs magnetic measurement on the high-temperature pipeline to be detected, obtains the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected, and compares the magnetic disturbance signal characteristic parameters of the high-temperature pipeline to be detected with the magnetic disturbance signal characteristic parameter curve and the boundary value of the magnetic disturbance signal characteristic parameter, so as to achieve the purpose of discovering IV type cracks of the high-temperature pipeline in advance and avoid accidents.

[0024] Figure 1 FIG. 1 is a flow chart of a method for detecting creep cracks in a high temperature pipeline provided by an embodiment of the present invention. Figure 1 As shown, this embodiment provides a creep crack detection method for a high-temperature pipeline, comprising: S1. Pre-acquire the characteristic parameters of magnetic disturbance without creep damage, the characteristic parameters of magnetic disturbance with insignificant creep damage, and the characteristic parameters of magnetic disturbance with obvious creep damage of the high-temperature pipeline; S2. According to the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameters of the low-visible creep damage, and the magnetic disturbance characteristic parameters of the obvious creep damage, the magnetic disturbance signal characteristic parameter curve and the boundary value of the magnetic disturbance signal characteristic parameter are obtained; S3. Obtain characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected, and compare the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether type IV cracks occur in the high-temperature pipeline to be detected.

[0025] Type IV cracks are essentially the aggregation and growth of creep holes. When creep holes are generated in welded joints, their magnetic properties will change. Magnetic detection technology is used to characterize the creep damage of other materials. However, the difference between type IV cracks in martensitic high-temperature pipe welded joints and conventional parent material creep is that type IV cracks in martensitic high-temperature pipe welded joints are mainly generated in the fine grain area. This area is very narrow, about 0.2 mm, and close to the weld, about 1 mm away. The creep damage generated in this area cannot be detected using conventional magnetic measurement technology such as hysteresis loop detection technology, metal magnetic memory detection technology, and magnetic acoustic emission detection technology. More accurate magnetic measurement technology must be used to reflect type IV cracks. Therefore, in this embodiment, permanent magnets and magnetic disturbance sensors are used to collect magnetic disturbance characteristic parameters of high-temperature pipelines that have no creep damage, magnetic disturbance characteristic parameters of inconspicuous creep damage, and magnetic disturbance characteristic parameters of obvious creep damage.

[0026] When a permanent magnet is placed close to the ferromagnetic component to be tested, a magnetic interaction field will be established. When a discontinuous mutation occurs on the component, a magnetic disturbance will be generated in the constructed magnetic interaction field and fed back to the permanent magnet, resulting in a significant magnetic field change in the permanent magnet, thereby achieving the measurement of the permanent magnet's magnetic disturbance [3]. This is used to characterize the degree of creep damage and provide data for the prevention of type IV cracks. The width of the sensor used to measure the permanent magnet's magnetic disturbance can be as small as 1 mm or even smaller.

[0027] In step S1, the pre-acquisition of magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, magnetic disturbance characteristic parameters of the high-temperature pipeline with insignificant creep damage, and magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage includes: S11. Select high-temperature pipelines that have not incurred creep damage, high-temperature pipelines that have insignificant creep damage, and high-temperature pipelines that have incurred significant creep damage; S12. Preliminarily perform magnetic detection on the high-temperature pipeline that has not incurred creep damage, and obtain magnetic disturbance characteristic parameters of the high-temperature pipeline that has not incurred creep damage; S13. Preliminarily perform magnetic detection on the high-temperature pipeline that has insignificant creep damage, and obtain characteristic parameters of magnetic disturbances that have insignificant creep damage on the high-temperature pipeline; S14. Perform magnetic detection on the high-temperature pipeline that has obvious creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline that has obvious creep damage.

[0028] In step S12, the high-temperature pipeline without creep damage is subjected to magnetic detection in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, including: S121. Preliminarily perform magnetic detection on the high-temperature pipeline that has not incurred creep damage to obtain a first permanent magnetic disturbance signal; S122. Extract characteristic data of the first permanent magnetic disturbance signal to obtain characteristic parameters of magnetic disturbance without creep damage to the high-temperature pipeline.

[0029] The method further comprises: In step S13, the high-temperature pipeline with inconspicuous creep damage is subjected to magnetic detection in advance to obtain characteristic parameters of magnetic disturbances of the high-temperature pipeline with inconspicuous creep damage, including: S131. Preliminarily perform magnetic detection on the high-temperature pipeline that has no obvious creep damage to obtain a second permanent magnetic disturbance signal; S132. Extract characteristic data of the second permanent magnetic disturbance signal to obtain characteristic parameters of magnetic disturbance that causes insignificant creep damage to the high-temperature pipeline.

[0030] In step S14, the high-temperature pipeline with obvious creep damage is subjected to magnetic detection in advance to obtain characteristic parameters of magnetic disturbances of the high-temperature pipeline with obvious creep damage, including: S141. Perform magnetic detection on the high-temperature pipeline with obvious creep damage in advance to obtain a third permanent magnetic disturbance signal; S142. Extract characteristic data of the third permanent magnetic disturbance signal to obtain characteristic parameters of magnetic disturbance that causes obvious creep damage to the high-temperature pipeline.

[0031] In step S121, the step of performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain a first permanent magnetic disturbance signal includes: Performing magnetic detection on a high-temperature pipeline that has not incurred creep damage according to a preset time interval, and obtaining a plurality of first real-time permanent magnetic disturbance data corresponding to a plurality of detection time points; The first permanent magnetic disturbance signal is determined according to a plurality of detection time points and first real-time permanent magnetic disturbance data corresponding to the plurality of detection time points.

[0032] In step S11, the selecting of the high-temperature pipelines without creep damage, the high-temperature pipelines with insignificant creep damage, and the high-temperature pipelines with obvious creep damage includes: S111. Collect image information of multiple high-temperature pipelines at welding locations; S112. Using an image recognition algorithm to identify the collected image information of multiple high-temperature pipelines at the welding points, obtain crack information of each high-temperature pipeline at the welding points; S113. According to the crack information of each high-temperature pipeline at the welding position, select the high-temperature pipeline without creep damage, the high-temperature pipeline with insignificant creep damage, and the high-temperature pipeline with obvious creep damage.

[0033] In step S3, the step of acquiring characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected, comparing the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether a type IV crack occurs in the high-temperature pipeline to be detected, comprises: S31. Obtaining characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected; S32. Determine whether the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal; S33. If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal, the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is compared with the characteristic parameter curve of the magnetic disturbance signal to determine the crack degree of the IV type crack of the high-temperature pipeline to be detected; S34. If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is not within the boundary value of the characteristic parameter of the magnetic disturbance signal, it is determined that no type IV crack occurs in the high-temperature pipeline to be detected.

[0034] Figure 2 The present invention provides a creep crack detection system for high temperature pipelines. Figure 2 As shown, the creep crack detection system for high temperature pipelines provided in this embodiment includes: A parameter acquisition unit, used to pre-acquire characteristic parameters of magnetic disturbances of a high-temperature pipeline without creep damage, characteristic parameters of magnetic disturbances of a high-temperature pipeline with inconspicuous creep damage, and characteristic parameters of magnetic disturbances of a high-temperature pipeline with obvious creep damage, and to acquire characteristic parameters of magnetic disturbance signals of the high-temperature pipeline to be detected; A magnetic disturbance signal characteristic parameter curve determination unit is used to obtain a magnetic disturbance signal characteristic parameter curve and a boundary value of the magnetic disturbance signal characteristic parameter according to the acquired magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameters of the high-temperature pipeline with insignificant creep damage, and the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage; The judgment unit compares the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack.

[0035] In this embodiment, the system further includes: an image recognition unit for selecting high-temperature pipelines without creep damage, high-temperature pipelines with inconspicuous creep damage, and high-temperature pipelines with obvious creep damage.

[0036] In this embodiment, the parameter acquisition unit includes: a permanent magnet and a magnetic disturbance sensor.

[0037] In this embodiment, the parameter acquisition unit is specifically used for: Select high-temperature pipelines that have no creep damage, high-temperature pipelines that have insignificant creep damage, and high-temperature pipelines that have obvious creep damage; Conducting magnetic detection on the high-temperature pipeline without creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage; Conduct magnetic detection on the high-temperature pipeline with inconspicuous creep damage in advance to obtain the characteristic parameters of magnetic disturbance caused by the inconspicuous creep damage on the high-temperature pipeline; Conduct magnetic detection on the high-temperature pipeline with obvious creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage.

[0038] The method of pre-performing magnetic detection on the high-temperature pipeline without creep damage to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage includes: Performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain a first permanent magnetic disturbance signal; The characteristic data of the first permanent magnetic disturbance signal is extracted to obtain the characteristic parameters of the magnetic disturbance without creep damage to the high-temperature pipeline.

[0039] The method of pre-performing magnetic detection on the high-temperature pipeline with inconspicuous creep damage to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline with inconspicuous creep damage includes: Conduct magnetic detection on high-temperature pipelines that do not have obvious creep damage in advance to obtain a second permanent magnetic disturbance signal; The characteristic data of the second permanent magnetic disturbance signal is extracted to obtain the characteristic parameters of the magnetic disturbance that causes inconspicuous creep damage to the high-temperature pipeline.

[0040] The method of pre-performing magnetic detection on the high-temperature pipeline with obvious creep damage to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage includes: Conduct magnetic detection on high-temperature pipelines with obvious creep damage in advance to obtain a third permanent magnetic disturbance signal; The characteristic data of the third permanent magnetic disturbance signal is extracted to obtain the characteristic parameters of the magnetic disturbance that causes obvious creep damage to the high-temperature pipeline.

[0041] The method of performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain the first permanent magnetic disturbance signal includes: Performing magnetic detection on a high-temperature pipeline that has not incurred creep damage according to a preset time interval, and obtaining a plurality of first real-time permanent magnetic disturbance data obtained at a plurality of detection time points; The first permanent magnetic disturbance signal is determined according to a plurality of detection time points and a plurality of first real-time permanent magnetic disturbance data.

[0042] The selection of high-temperature pipelines without creep damage, high-temperature pipelines with inconspicuous creep damage, and high-temperature pipelines with obvious creep damage includes: Collect image information of multiple high-temperature pipelines at welding points; Using an image recognition algorithm to identify the collected image information of multiple high-temperature pipelines at the welding position, and obtain crack information in the image information of each high-temperature pipeline at the welding position; According to the crack information in the image information of each high-temperature pipeline at the welding position, the high-temperature pipeline without creep damage, the high-temperature pipeline with inconspicuous creep damage and the high-temperature pipeline with obvious creep damage are selected.

[0043] The judging unit is specifically used for: Determining whether the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the boundary value of the characteristic parameter of the magnetic disturbance signal; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the boundary value of the characteristic parameter of the magnetic disturbance signal, the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is compared with the characteristic parameter curve of the magnetic disturbance signal to determine the crack degree of the IV type crack of the high-temperature pipeline to be detected; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is not within the boundary value of the characteristic parameter of the magnetic disturbance signal, it is determined that no IV type crack occurs in the high-temperature pipeline to be detected.

[0044] An embodiment of the present invention further provides a computer device, comprising: a memory, a processor, and a computer program, wherein the computer program is stored in the memory and is configured to be executed by the processor to implement the above-mentioned creep crack detection method for high-temperature pipelines.

[0045] The embodiment of the present invention further provides a machine-readable storage medium having computer program instructions stored thereon, and the computer program instructions, when executed by a processor, implement the above-mentioned creep crack detection method for high-temperature pipelines.

[0046] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The solutions in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and interpreted scripting language JavaScript, etc.

[0047] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0048] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0049] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for detecting creep cracks in high temperature pipelines, characterized in that: include: Pre-acquire the characteristic parameters of magnetic disturbances without creep damage, the characteristic parameters of magnetic disturbances with inconspicuous creep damage, and the characteristic parameters of magnetic disturbances with obvious creep damage of the high-temperature pipeline; According to the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameters of the high-temperature pipeline with insignificant creep damage, and the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage, a magnetic disturbance signal characteristic parameter curve and boundary values ​​of the magnetic disturbance signal characteristic parameters are obtained; Acquire characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected; The characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected are compared with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack.

2. The method for detecting creep cracks in high temperature pipelines according to claim 1, characterized in that: The method of pre-acquiring characteristic parameters of magnetic disturbances of a high-temperature pipeline without creep damage, characteristic parameters of magnetic disturbances of a high-temperature pipeline with inconspicuous creep damage, and characteristic parameters of magnetic disturbances of a high-temperature pipeline with obvious creep damage comprises: Select high-temperature pipelines that have no creep damage, high-temperature pipelines that have insignificant creep damage, and high-temperature pipelines that have obvious creep damage; Conducting magnetic detection on the high-temperature pipeline without creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage; Conduct magnetic detection on the high-temperature pipeline with inconspicuous creep damage in advance to obtain the characteristic parameters of magnetic disturbance caused by the inconspicuous creep damage on the high-temperature pipeline; Conduct magnetic detection on the high-temperature pipeline with obvious creep damage in advance to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline with obvious creep damage.

3. The method for detecting creep cracks in high temperature pipelines according to claim 2, characterized in that: The method of pre-performing magnetic detection on the high-temperature pipeline without creep damage to obtain the magnetic disturbance characteristic parameters of the high-temperature pipeline without creep damage includes: Performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain a first permanent magnetic disturbance signal; The characteristic data of the first permanent magnetic disturbance signal is extracted to obtain the characteristic parameters of the magnetic disturbance without creep damage to the high-temperature pipeline.

4. The method for detecting creep cracks in a high temperature pipeline according to claim 3, characterized in that: The method of performing magnetic detection on the high-temperature pipeline without creep damage in advance to obtain the first permanent magnetic disturbance signal includes: Performing magnetic detection on a high-temperature pipeline that has not incurred creep damage according to a preset time interval, and obtaining a plurality of first real-time permanent magnetic disturbance data corresponding to a plurality of detection time points; The first permanent magnetic disturbance signal is determined according to a plurality of detection time points and a plurality of first real-time permanent magnetic disturbance data corresponding to the plurality of detection time points.

5. The method for detecting creep cracks in a high temperature pipeline according to claim 2, characterized in that: The selection of high-temperature pipelines without creep damage, high-temperature pipelines with inconspicuous creep damage, and high-temperature pipelines with obvious creep damage includes: Collect image information of multiple high-temperature pipelines at welding points; Using an image recognition algorithm to identify image information of the plurality of high-temperature pipelines at the welding locations, and obtaining crack information of each high-temperature pipeline at the welding location; According to the crack information of each high-temperature pipeline at the welding position, the high-temperature pipeline with no creep damage, the high-temperature pipeline with inconspicuous creep damage and the high-temperature pipeline with obvious creep damage are selected.

6. The method for detecting creep cracks in a high temperature pipeline according to claim 1, characterized in that: Comparing the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack, including: Determining whether the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is within the range of the boundary value of the characteristic parameter of the magnetic disturbance signal, the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is compared with the characteristic parameter curve of the magnetic disturbance signal to determine the crack degree of the IV type crack of the high-temperature pipeline to be detected; If the characteristic parameter of the magnetic disturbance signal of the high-temperature pipeline to be detected is not within the boundary value of the characteristic parameter of the magnetic disturbance signal, it is determined that no IV type crack occurs in the high-temperature pipeline to be detected.

7. A creep crack detection system for high temperature pipelines, characterized in that: The system comprises: A parameter acquisition unit, used to pre-acquire characteristic parameters of magnetic disturbances of a high-temperature pipeline without creep damage, characteristic parameters of magnetic disturbances of a high-temperature pipeline with inconspicuous creep damage, and characteristic parameters of magnetic disturbances of a high-temperature pipeline with obvious creep damage, and to acquire characteristic parameters of magnetic disturbance signals of the high-temperature pipeline to be detected; A parameter curve determination unit is used to obtain a magnetic disturbance signal characteristic parameter curve and a boundary value of the magnetic disturbance signal characteristic parameter according to the magnetic disturbance characteristic parameter of the high-temperature pipeline without creep damage, the magnetic disturbance characteristic parameter of the high-temperature pipeline with inconspicuous creep damage, and the magnetic disturbance characteristic parameter of the high-temperature pipeline with obvious creep damage; The judgment unit is used to compare the characteristic parameters of the magnetic disturbance signal of the high-temperature pipeline to be detected with the characteristic parameter curve of the magnetic disturbance signal and the boundary value of the characteristic parameter of the magnetic disturbance signal to determine whether the high-temperature pipeline to be detected has a type IV crack.

8. The high temperature pipeline creep crack detection system according to claim 7, characterized in that: The system further comprises: The image recognition unit is used to recognize the collected image information of multiple high-temperature pipelines at the welding points, obtain the crack information of each high-temperature pipeline at the welding points, and select the high-temperature pipeline without creep damage, the high-temperature pipeline with inconspicuous creep damage, and the high-temperature pipeline with obvious creep damage according to the crack information of each high-temperature pipeline at the welding points.

9. A computer device, characterized in that: include: Memory; processor; as well as Computer programs; Wherein, the computer program is stored in a memory and is configured to be executed by a processor to implement the creep crack detection method for a high-temperature pipeline as described in any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the creep crack detection method for a high-temperature pipeline according to any one of claims 1 to 6.

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