Ultrasonic detection test device for welding defects of cast austenitic stainless steel pipeline
By setting preset defects in the ultrasonic testing device for welding defects in cast austenitic stainless steel pipes, the problem of poor reliability of ultrasonic testing results was solved, and the ultrasonic testing equipment and process were effectively verified, ensuring the accuracy and reliability of the test.
Patent Information
- Application Number
- CN202422418851.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Existing ultrasonic testing technology has poor reliability in detecting welding defects in cast austenitic stainless steel pipes, and it is difficult to verify the effectiveness of ultrasonic testing equipment and processes.
An ultrasonic testing device for welding defects in cast austenitic stainless steel pipes is designed. By setting multiple preset defects at the weld seam of the pipe body, the device simulates the defects that may occur during the actual welding process, ensuring that the defect type, shape and size are known, so as to verify the ultrasonic testing equipment or process.
By comparing known preset defect data with ultrasonic detection results, the accuracy and reliability of ultrasonic detection equipment or processes can be ensured, facilitating improvement and verification, and ensuring the stable use of cast austenitic stainless steel pipes.
Smart Images
Figure CN223727762U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of pipeline ultrasonic detection, and more particularly relates to a cast austenitic stainless steel pipeline welding defect ultrasonic detection test device. BACKGROUND
[0002] Cast austenitic stainless steel pipelines have good corrosion resistance and high temperature performance, and are widely used in the nuclear energy, chemical industry and petroleum industries. When cast austenitic stainless steel pipelines are connected by welding process, welding defects will inevitably occur at the weld due to factors such as material properties and welding process. The existence of these welding defects will affect the safety and reliability of the pipeline. The existence of these defects not only affects the performance of the pipeline, but also may cause serious safety accidents. Therefore, it is particularly important to effectively detect welding defects.
[0003] Traditional welding defect detection methods include radiographic detection, magnetic powder detection and penetration detection, etc. However, these methods have certain limitations when detecting austenitic stainless steel pipelines. For example, the radiographic detection has low sensitivity to small defects, the magnetic powder detection is not suitable for non-magnetic materials, and the penetration detection is difficult to detect internal defects. In contrast, ultrasonic detection technology has the advantages of strong penetration, high detection sensitivity and no damage to the material, and therefore has been widely used in the detection of welding defects of austenitic stainless steel pipelines.
[0004] However, different ultrasonic detection equipment or ultrasonic detection processes will obtain different defect data, making it difficult to accurately determine the reliability of the ultrasonic detection results. Moreover, when improving the ultrasonic detection equipment or ultrasonic detection process, it is also difficult to verify the improved equipment or process. CONTENT OF THE INVENTION
[0005] The purpose of the embodiments of the present application is to provide a cast austenitic stainless steel pipeline welding defect ultrasonic detection test device to solve the problem of poor reliability of ultrasonic detection results and difficulty in verifying ultrasonic detection equipment and process in the prior art.
[0006] To achieve the above-mentioned purpose, the present application provides a cast austenitic stainless steel pipeline welding defect ultrasonic detection test device, which comprises a pipeline body, the pipeline body is provided with a weld, the weld extends along the circumference of the pipeline body, and at least one preset defect is arranged inside the weld and / or near the weld of the pipeline body.
[0007] In some embodiments, the number of preset defects is multiple, and multiple preset defects are arranged at intervals along the circumference of the weld.
[0008] In some embodiments, at least 75% of the plurality of preset defects are arranged in the weld seam, and the rest of the plurality of preset defects are arranged near the weld seam of the pipe body.
[0009] In some embodiments, at least 60% of the plurality of preset defects are arranged at a root position of the weld seam.
[0010] In some embodiments, at least one of the preset defects is a circumferential defect, and the circumferential defect extends in a circumferential direction of the weld seam; and at least one of the preset defects is an axial defect, and the axial defect extends in an axial direction of the pipe body.
[0011] In some embodiments, the number of axial defects is at least two.
[0012] In some embodiments, the preset defects have an extension length greater than 15% of a wall thickness of the pipe body.
[0013] In some embodiments, at least 60% of the plurality of preset defects have an extension length of 25% to 50% of a wall thickness of the pipe body.
[0014] In some embodiments, the pipe body includes two pipe pieces, and the two pipe pieces are welded at end faces to form the weld seam between the two pipe pieces.
[0015] In some embodiments, a welding groove is formed between the two pipe pieces, and the weld seam is filled with welding material in the welding groove.
[0016] The casting austenitic stainless steel pipe welding defect ultrasonic testing device provided by the present application has the following beneficial effects: by arranging preset defects at the weld seam of the pipe body to simulate defects generated in the welding process of the casting austenitic stainless steel pipe, the types, shapes, and sizes of each preset defect are known, thereby verifying the ultrasonic detection equipment or process, comparing the ultrasonic detection data with the known preset defect data, determining whether the ultrasonic detection equipment or process meets the technical requirements, ensuring the accuracy and reliability of the ultrasonic detection equipment or process results, facilitating the research and development of the ultrasonic detection equipment or process, verifying the improved ultrasonic detection equipment or process, and ensuring the stable use of the casting austenitic stainless steel pipe. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.
[0018] Figure 1 Figure 1 is a structural schematic diagram of an ultrasonic testing device for welding defects of cast austenitic stainless steel pipes in the embodiments of the present application;
[0019] Figure 2 Figure 2 is a structural schematic diagram of the ultrasonic testing device for welding defects of cast austenitic stainless steel pipes in the embodiments of the present application; Figure 1 Figure 3 is a sectional view in A-A direction of the ultrasonic testing device for welding defects of cast austenitic stainless steel pipes in the embodiments of the present application;
[0020] Figure 3 Figure 4 is a schematic diagram of the expansion in B direction of the ultrasonic testing device for welding defects of cast austenitic stainless steel pipes in the embodiments of the present application. Figure 1
[0021] In the drawings, various reference signs represent the following elements:
[0022] 100-pipe body;
[0023] 110-pipe piece;
[0024] 101-welding seam;
[0025] 102-predefined defect;
[0026] 102a-first defect; 102b-second defect; 102c-third defect; 102d-fourth defect;
[0027] 102e-fifth defect; 102f-sixth defect; 102g-seventh defect; 102h-eighth defect;
[0028] 102j-ninth defect; 102k-tenth defect; 102m-eleventh defect; 102n-twelfth defect. DETAILED DESCRIPTION
[0029] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.
[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0033] The embodiment of the present application provides a kind of casting austenitic stainless steel pipeline welding defect ultrasonic testing device, including pipeline body 100, pipeline body 100 is provided with weld 101, weld 101 extends along the circumferential direction of pipeline body 100, at least one preset defect 102 is arranged in weld 101 and / or at the weld 101 of pipeline body 100.
[0034] Pipeline body 100 is made of casting austenitic stainless steel material, and the shape of pipeline body 100 is not limited, which should be the same as the shape of casting austenitic stainless steel pipeline in actual application. In the embodiment, the pipeline body 100 is a circular pipeline.
[0035] Pipeline body 100 can include two pipeline pieces 110, which are coaxially arranged and end face welded to form an annular weld 101 between the two pipeline pieces 110. In addition, a groove extending along the circumferential side can also be formed on the integrally formed pipeline body 100, and the groove is welded to form the weld 101.
[0036] Further, a welding groove can be formed between the two pipeline pieces 110, and the welding material of the weld 101 is filled in the welding groove to form the weld 101 in the welding groove. The welding groove can be U-shaped or V-shaped, and the welding groove can be formed by arranging a bevel surface on the end of the two pipeline pieces 110, so that the end of the two pipeline pieces 110 with the bevel surface is opposite to form the welding groove.
[0037] Weld 101 can be welded in welding groove according to the welding process of casting austenitic stainless steel pipeline in actual use to simulate the defect phenomenon generated by actual welding operation. The welding material used for welding can be the same as the material of pipeline body 100 or different defect material to simulate the material mismatch problem that may occur in the actual welding process.
[0038] Of course, the cast austenitic stainless steel pipe welding defect ultrasonic testing device can also be made using a variety of different welding processes, such as manual arc welding, gas shielded welding, etc., which can be used to verify the detection effect of the ultrasonic detection equipment or process when facing defects generated by different welding processes.
[0039] The preset defects 102 are formed by manual control or mechanical equipment control during the welding process. The preset defects 102 can be cracks, pores, or inclusions, etc. The crack defects can be designed to have different opening widths and depths, the pore defects can be simulated as cavities of different sizes and distributions, and the inclusion defects can be simulated as foreign matter embedded in different shapes and sizes. Among them, at least 70% of the preset defects 102 should be crack defects. The shape of the preset defect 102 can be set to a variety of shapes such as round, oval, long strip, irregular shape, etc. to simulate different types of defects that may occur in the actual welding process, which can more comprehensively evaluate the performance of the ultrasonic detection equipment or process when detecting different shaped defects.
[0040] The shape and size of the preset defect 102 are determined according to the needs of the ultrasonic detection sweep test, and the type, shape and size of each preset defect 102 are determined. When verifying the ultrasonic detection equipment or process, the cast austenitic stainless steel pipe welding defect ultrasonic testing device can be used as a detected body. By comparing the results of the actual detection data and the standard data, the accuracy of the ultrasonic detection equipment or process is determined to ensure the accuracy and reliability of the ultrasonic detection equipment or process in actual application.
[0041] In some embodiments, the number of preset defects 102 is a plurality, and the plurality of preset defects 102 are arranged along the circumference of the weld 101. Among them, the type of the preset defect 102 can be arbitrary.
[0042] As shown in FIG. 1, in the embodiment, the number of preset defects 102 is 12, and the 12 preset defects 102 are uniformly arranged along the circumference of the pipe body 100, and all the preset defects 102 are crack defects. Figure 2
[0043] Among them, the 12 preset defects 102 are arranged along the clockwise direction as shown in FIG. 1, and are sequentially arranged as the first defect 102a, the second defect 102b, the third defect 102c, the fourth defect 102d, the fifth defect 102e, the sixth defect 102f, the seventh defect 102g, the eighth defect 102h, the ninth defect 102j, the tenth defect 102k, the eleventh defect 102m, and the twelfth defect 102n. And all the preset defects 102 are crack defects. Figure 2
[0044] Furthermore, while ensuring sufficient ultrasonic scanning space for each preset defect 102, the preset defects 102 can be distributed more densely to simulate defect concentration areas that may occur during actual welding. These defects can be of the same type or different types. In this way, the performance of the ultrasonic testing equipment in detecting defect-dense areas can be evaluated more comprehensively.
[0045] Understandably, in actual welding processes, defects may occur inside the weld 101, or they may appear on the pipe body 100 near the weld 101 due to material inhomogeneity, stress concentration during processing, or other reasons, such as on the bevel surface of the pipe fitting 110. Therefore, in order to better simulate the types of defects produced by actual processes, among the multiple preset defects 102, preset defects 102 should be set both inside the weld 101 and near the weld 101 on the pipe body 100. Alternatively, preset defects 102 can be set only inside the weld 101 or only near the weld 101 on the pipe body 100, depending on the actual ultrasonic testing requirements.
[0046] In some embodiments, at least 75% of the pre-defined defects 102 are located within the weld 101, while the remaining pre-defined defects 102 are located on the pipe body 100 near the weld 101. This simulates the phenomenon that defects are more likely to appear within the weld 101 in actual welding processes.
[0047] like Figure 2 As shown, in this embodiment, the first defect 102a, the second defect 102b, the third defect 102c, the fourth defect 102d, the fifth defect 102e, the seventh defect 102g, the eighth defect 102h, and the ninth defect 102j are all located within the weld 101, while the remaining sixth defect 102f, tenth defect 102k, eleventh defect 102m, and twelfth defect 102n are located on the pipe body 100 near the weld 101.
[0048] Furthermore, to simulate the complex environments in real-world applications, the pre-set defects 102 can be located at different depths. For example, some defects can be located near the surface of the weld 101, while others can be deeply embedded within the weld 101. This design helps evaluate the performance of the ultrasonic testing equipment in detecting defects at different depths.
[0049] In some embodiments, at least 60% of the plurality of preset defects 102 are arranged at the root of the weld 101. The root of the weld 101 refers to the portion of the weld 101 that is close to the inner side of the pipe body 100. By arranging more preset defects 102 at the root of the weld 101, the performance of the ultrasonic detection device or process in detecting defects at the root of the weld 101 can be more effectively evaluated. In the present embodiment, the second defect 102b, the fourth defect 102d, the sixth defect 102f, the seventh defect 102g, the ninth defect 102j, the tenth defect 102k, the eleventh defect 102m, and the twelfth defect 102n are arranged at the root of the weld 101.
[0050] In the plurality of preset defects 102, at least one preset defect 102 is a circumferential defect, and the extension direction of the circumferential defect is the circumferential direction of the pipe body 100. The circumferential defect can be caused by non-uniformity of the material or improper operation during the welding process. In addition, at least one preset defect 102 is an axial defect, and the extension direction of the axial defect is the axial direction of the pipe body 100. The axial defect is formed due to the influence of welding stress and thermal cycle during the welding process.
[0051] In the present embodiment, the number and distribution position of the two types of defects are arbitrary, so as to simulate the phenomenon that various defects are arbitrarily distributed in actual welding operations. In some embodiments, the number of axial defects is at least two, which not only simulates the phenomenon that circumferential defects are more common in actual production, but also ensures that there are sufficient axial defects for ultrasonic detection and comparison of result data.
[0052] In addition, some preset defects 102 can also be arranged obliquely with respect to the axial direction of the pipe body 100, so as to facilitate the evaluation of the performance of the ultrasonic detection device in detecting defects in different directions.
[0053] In the present embodiment, the first defect 102a, the second defect 102b, the third defect 102c, the fourth defect 102d, the sixth defect 102f, the eighth defect 102h, and the tenth defect 102k are circumferential defects. The remaining fifth defect 102e, seventh defect 102g, ninth defect 102j, eleventh defect 102m, and twelfth defect 102n are axial defects.
[0054] In some embodiments, the extension length of the preset defect 102 is greater than 15% of the wall thickness of the pipe body 100.
[0055] For the circumferential defects, the length of the circumferential defects in the circumferential direction of the pipe body 100 is not less than 15% of the wall thickness of the pipe body 100. For the axial defects, the length of the circumferential defects in the axial direction of the pipe body 100 is also not less than 15% of the wall thickness of the pipe body 100. It can be ensured that the echo signal of the defect has sufficient strength during ultrasonic detection, thereby improving the sensitivity and reliability of the ultrasonic detection scan.
[0056] In addition, in order to further simulate the complex situation in actual production, each preset defect 102 can have different depths. In some embodiments, at least 60% of the preset defects 102 in the plurality of preset defects have an extension length of 25% to 50% of the wall thickness of the pipe body 100, so as to verify the performance of the ultrasonic detection device or process when detecting defects of different lengths.
[0057] In summary, the cast austenitic stainless steel pipe welding defect ultrasonic detection test device provided by the embodiments of the present application can simulate various defect situations that may occur in the actual welding process by pre-setting a plurality of preset defects 102 at the weld 101, and the positions, shapes and sizes of the plurality of preset defects 102 are different, which can more comprehensively evaluate the performance of the ultrasonic detection device or process when detecting defects of different positions, shapes or sizes, and help to improve the accuracy of the ultrasonic detection device or process, and can ensure the reliability and effectiveness of the ultrasonic detection device or process in actual application.
[0058] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An ultrasonic testing device for detecting welding defects in cast austenitic stainless steel pipes, characterized in that, The pipeline body is provided with a weld extending along the circumference of the pipeline body, and the inside of the weld and / or the pipeline body near the weld is provided with at least one preset defect.
2. The cast austenitic stainless steel pipe welding flaw ultrasonic test apparatus according to claim 1, characterized by, The number of the preset defects is multiple, and the multiple preset defects are arranged at intervals along the circumference of the weld.
3. The apparatus for cast austenitic stainless steel pipe welding defect ultrasonic test according to claim 2, characterized in that, At least 75% of the multiple preset defects are arranged in the weld, and the rest of the preset defects are arranged near the weld of the pipeline body.
4. The apparatus for cast austenitic stainless steel pipe welding defect ultrasonic test according to claim 3, characterized in that, At least 60% of the multiple preset defects are arranged at the root position of the weld.
5. The cast austenitic stainless steel pipe welding flaw ultrasonic test apparatus according to any one of claims 1 to 4, characterized by, At least one of the preset defects is a circumferential defect, and the extension direction of the circumferential defect is the circumference of the pipeline body. At least one of the preset defects is an axial defect, and the extension direction of the axial defect is the axis of the pipeline body.
6. The cast austenitic stainless steel pipe welding flaw ultrasonic test apparatus according to claim 5, characterized by, The number of the axial defects is at least two.
7. The apparatus for cast austenitic stainless steel pipe welding defect ultrasonic test according to claim 5, wherein, The extension length of the preset defect is greater than 15% of the wall thickness of the pipeline body.
8. The cast austenitic stainless steel pipe welding flaw ultrasonic test apparatus according to claim 7, characterized by, The extension length of at least 60% of the multiple preset defects is 25%-50% of the wall thickness of the pipeline body.
9. The cast austenitic stainless steel pipe welding flaw ultrasonic test apparatus according to any one of claims 1 to 4, characterized by, The pipeline body comprises two pipeline pieces, and the two pipeline pieces are end-welded to form the weld between the two pipeline pieces.
10. The apparatus for cast austenitic stainless steel pipe welding defect ultrasonic test according to claim 9, wherein, A welding groove is formed between the two pipeline pieces, and the weld is filled in the welding groove.