A fillet weld detection process and test block based on ultrasonic technology

Abstract

The invention discloses a fillet weld detection process and a test block based on ultrasonic technology. The invention belongs to the field of fillet weld detection and relates to a fillet weld detection process technology based on ultrasonic technology. The invention is used to solve the problem that the prior art is only applicable to the performance test of a flat plate butt weld instrument and cannot fully reflect the performance of the instrument when it is directly facing the fillet weld detection; it is applicable to conventional ultrasound and phased array ultrasound but not to fully focused ultrasound; it is applicable to both phased array ultrasound detection technology and fully focused ultrasound detection technology; the invention is applicable to fillet welds whose branches are small-diameter pipes (outer diameter is less than 100 mm); it is applicable to the situation where there are drill holes and steps in the on-site fillet weld structure; it is applicable to the verification of the detection process, and the test block pays special attention to the detection of surface defects, hazardous defects in important parts of the weld, defects in special parts such as steps and drill holes; the test block can test the instrument performance according to the structure of the fillet weld to verify whether the instrument performance meets the needs of fillet weld detection.

Description

Technical Field

[0001] The invention belongs to the field of fillet weld detection, and relates to a fillet weld detection process technology based on ultrasonic technology, and specifically to a fillet weld detection process and a test block based on ultrasonic technology. Background Art

[0002] At present, the detection of fillet welds mainly uses X-ray or conventional ultrasonic detection methods. In recent years, with the development of computer technology, phased array ultrasonic detection technology has been increasingly used in the detection of pipeline welded joints. There is no special simulation test block for pipeline welded joint detection in the prior art. The existing simulation test blocks are mainly processed according to the specifications and dimensions of the pipe fittings and a certain amount of common types of defects are formed. This type of defect simulation test block generally only considers regular specifications of inserted or placed fillet welds, and does not consider the presence of drill holes or steps inside the fillet weld. For the performance test of the detection instrument, the A and B test blocks in GB / T29302 "Performance and Inspection of Phased Array Ultrasonic Detection Systems for Nondestructive Testing Instruments" are generally used, and there is no special detection test block for fillet welds. Due to the special structure of fillet welds, the signal identification process involves the primary, secondary and tertiary waves of ultrasonic signals. The detection process verification of pipeline fillet welds with phased array instruments cannot be applied to fillet welds with irregular structures. It is mainly aimed at fillet welds with larger branch pipe specifications, and generally does not involve the situation where the branch pipe is a small-diameter pipe (less than 100 mm in diameter). It is only suitable for performance testing of flat-plate butt weld instruments, and cannot fully reflect the performance of the instrument when detecting fillet welds. It is suitable for conventional ultrasound and phased array ultrasound, but not for fully focused ultrasound. Summary of the invention

[0003] The purpose of the present invention is to provide a fillet weld detection process and test block based on ultrasonic technology, which is used to solve the problem that the existing technology is only applicable to the performance test of flat butt weld instruments, and cannot fully reflect the performance of the instrument when detecting fillet welds; it is applicable to conventional ultrasound and phased array ultrasound, but not to fully focused ultrasound.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A fillet weld detection process based on ultrasonic technology, the fillet weld detection process includes the following steps:

[0006] Step 1: Place the probe on the branch pipe of the fillet weld test block close to the weld, ensuring that the curvature diameter of the probe's matching wedge matches the diameter of the branch pipe of the fillet weld verification test block;

[0007] Step 2: During instrument performance verification, different probes are selected and different settings are used in the instrument to test the performance of the instrument and probe combination.

[0008] Step 3: After completing the selection of instruments and probes and related settings, place the probes at the corresponding positions of the test blocks and observe the test results;

[0009] Step 4: Evaluate the test results.

[0010] Furthermore, in step 1, the placement position of the probe is exactly the same as the placement position of the probe in the detection process that needs to be verified.

[0011] Furthermore, the following parameters are considered when selecting the probe in step 2: frequency, number of chips, and chip spacing; when verifying the performance of phased array ultrasonic imaging, the following parameters are considered: the number of instrument channels, the number of excitation chips during phased array ultrasonic imaging, the angle range of sector scanning imaging, the angle step value during sector scanning imaging, the setting of the focusing mode, the selection of the full focusing imaging mode, and the step value of the full focusing imaging.

[0012] Furthermore, the evaluation in step 4 is as follows:

[0013] A1: Observe whether the curved hole to be tested on the test block can be displayed on the ultrasonic instrument. If the test result cannot be displayed, it will be judged as failure;

[0014] A2: Observe whether the above-mentioned curved holes can be displayed clearly and independently. When the display signals of the curved holes are connected together, the test result is judged as failure.

[0015] A fillet weld test block based on ultrasonic technology, comprising a main test block, a first rotating fixed platform, a second rotating fixed platform, a test plate and an inner insert plate;

[0016] The main test block is rectangular, and the two corners are provided with arc-shaped chamfers, the first rotating fixed platform passes through the upper half of the main test block, and the second rotating fixed platform passes through the lower half of the main test block, and both the first rotating fixed platform and the second rotating fixed platform are provided with fixing grooves;

[0017] The test plate is semicircular, and is provided with first detection holes, which are arranged in a semicircular shape;

[0018] A fixing hole is formed at one end of the test plate, and the fixing hole has the same cross-sectional shape as the first rotating fixing platform and the second rotating fixing platform;

[0019] A fixing block is welded in the fixing hole, and the fixing block is used in conjunction with the fixing groove;

[0020] The other end of the test plate is provided with a limiting groove, and the limiting groove is an arc-shaped groove, and the limiting groove can be used in conjunction with the first rotating fixed platform and the second rotating fixed platform.

[0021] Furthermore, an embedded groove is provided on one side of the test board, an inner plug-in plate is embedded in the embedded groove, a second detection hole is provided on the inner plug-in plate, the second detection hole is arranged corresponding to the first detection hole, and the diameter of the second detection hole is smaller than the first detection hole.

[0022] Furthermore, one end of the inner plug-in plate is rotatably connected to a fixing button, and a pull-out plate is rotatably connected between the fixing button and the inner plug-in plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Applicable to both phased array ultrasonic testing technology and fully focused ultrasonic testing technology;

[0025] 2. Suitable for fillet welds where the branch pipe is a small diameter pipe (outer diameter less than 100mm);

[0026] 3. Applicable to situations where there are drilling holes and steps in the on-site fillet weld structure;

[0027] 4. Suitable for verification of testing technology. The test block pays special attention to the detection of surface defects, hazardous defects in important parts of welds, defects in special parts such as steps and holes;

[0028] 5. The test block can test the performance of the instrument according to the structure of the fillet weld to verify whether the performance of the instrument meets the requirements of fillet weld detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the test block structure of the present invention;

[0031] Figure 2 It is a principle block diagram of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of region 1 of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of region 2 of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of region 3 of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of region 4 of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of area 5 of the present invention.

[0037] In the figure: 1. main test block; 2. first rotating fixed platform; 3. second rotating fixed platform; 4. test plate; 5. inner plug-in plate; 6. fixing groove; 7. first detection hole; 8. fixing hole; 9. fixing block; 10. limiting groove; 11. embedded groove; 13. second detection hole; 14. fixing button; 15. pull-out plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Therefore, the detailed description of the embodiments of the present invention provided in the following figures is not intended to limit the scope of the claimed invention but is merely representative of selected embodiments of the present invention.

[0040] like Figure 1-7 As shown, a fillet weld detection process based on ultrasonic technology, the fillet weld detection process includes the following steps:

[0041] Step 1: Place the probe on the branch pipe of the fillet weld test block close to the weld, ensuring that the curvature diameter of the probe's matching wedge matches the diameter of the branch pipe of the fillet weld verification test block;

[0042] Step 2: During instrument performance verification, different probes are selected and different settings are used in the instrument to test the performance of the instrument and probe combination.

[0043] Step 3: After completing the selection of instruments and probes and related settings, place the probes at the corresponding positions of the test blocks and observe the test results;

[0044] Step 4: Evaluate the test results.

[0045] In step 1, the placement position of the probe is exactly the same as the placement position of the probe in the test process that needs to be verified.

[0046] When selecting the probe in step 2, consider the following parameters: frequency, number of chips, and chip spacing; when verifying the performance of phased array ultrasonic imaging, consider the following parameters: the number of instrument channels, the number of excitation chips during phased array ultrasonic imaging, the angle range of sector scanning imaging, the angle step value during sector scanning imaging, the setting of the focusing method (depth, sound path, projection), the selection of the full focusing imaging mode (pulse reflection, serial), and the step value of full focusing imaging.

[0047] The specific evaluation in step 4 is:

[0048] A1: Observe whether the curved hole to be tested on the test block can be displayed on the ultrasonic instrument. If the test result cannot be displayed, it will be judged as failure;

[0049] A2: Observe whether the above-mentioned curved holes can be displayed clearly and independently. When the display signals of the curved holes are connected together, the test result is judged as failure;

[0050] A fillet weld test block based on ultrasonic technology, comprising a main test block 1, a first rotating fixed platform 2, a second rotating fixed platform 3, a test plate 4 and an inner insert plate 5;

[0051] The main test block 1 is rectangular, and arc-shaped rounded corners are provided on both sides. The first rotating fixed platform 2 passes through the upper half of the main test block 1, and the second rotating fixed platform 3 passes through the lower half of the main test block 1. Both the first rotating fixed platform 2 and the second rotating fixed platform 3 are provided with fixing grooves 6.

[0052] The test plate 4 is semicircular, and first detection holes 7 are provided on the test plate 4. The first detection holes 7 are arranged in a semicircular shape.

[0053] A fixing hole 8 is formed at one end of the test plate 4, and the fixing hole 8 has the same cross-sectional shape as the first rotating fixing platform 2 and the second rotating fixing platform 3;

[0054] A fixing block 9 is welded in the fixing hole 8, and the fixing block 9 is used in conjunction with the fixing groove 6;

[0055] A limiting groove 10 is provided at the other end of the test plate 4 . The limiting groove 10 is an arc-shaped groove. The limiting groove 10 can be used in conjunction with the first rotating fixed platform 2 and the second rotating fixed platform 3 .

[0056] An embedded groove 11 is provided on one side of the test board 4 , and an inner plug-in board 5 is embedded in the embedded groove 11 . A second detection hole 13 is provided on the inner plug-in board 5 . The second detection hole 13 is arranged corresponding to the first detection hole 7 , and the diameter of the second detection hole 13 is smaller than that of the first detection hole 7 .

[0057] One end of the inner plug-in board 5 is rotatably connected to a fixing button 14 , and a pull-out plate 15 is rotatably connected between the fixing button 14 and the inner plug-in board 5 .

[0058] The specific embodiments of the present invention are as follows:

[0059] Embodiment 1:

[0060] According to the specific specifications of the fillet weld pipe to be tested, a series of simulation test blocks with the same specifications but with a certain number of bent holes are designed for testing instrument performance and verifying the effect of defect detection in difficult areas. The bent holes are generally ф1mm in size, and can also be changed to other specifications according to the needs of instrument performance testing or detection process verification.

[0061] The method of using the test block for fillet weld inspection process verification and instrument performance test is to place the probe at the position of the branch pipe of the fillet weld test block close to the weld, ensuring that the curvature diameter of the probe wedge matches the diameter of the branch pipe of the fillet weld verification test block. The placement position of the probe is exactly the same as the placement position of the probe in the inspection process to be verified. When verifying the performance of the instrument, the performance of the instrument and probe combination is tested by selecting different probes and using different settings in the instrument. The following parameters are considered when selecting the probe: frequency, number of chips, and chip spacing. When verifying the performance of phased array ultrasonic imaging, the following parameters are considered: the number of channels of the instrument, the number of excitation chips during phased array ultrasonic imaging, the angle range of sector scanning imaging, the angle step value during sector scanning imaging, the setting of the focusing method (depth, sound path, projection), the selection of the full focus imaging mode (pulse reflection, serial), and the step value of the full focus imaging. After completing the selection of instruments and probes and related settings, place the probe at the corresponding position of the test block, observe the test results, and judge whether the test is passed by referring to the following criteria: 1. Observe whether the curved holes to be tested on the test block can be displayed on the ultrasonic instrument. If the test results cannot be displayed, they will be judged as failures; 2. Observe whether the above-mentioned curved holes can be displayed clearly and independently. When the display signals of the curved holes are connected together, the test results are judged as failures.

[0062] The test block is mainly used for the inspection process verification and instrument performance test of multiple areas of fillet welds, such as Figure 3 As shown, area 1 is the near-surface area, which is used to test the near-surface defect detection capability of the fillet weld inspection process, and is also used to test the resolution of the ultrasonic instrument in the near-surface area. Figure 4 As shown, area 2 includes the weld area and the base material area of ​​the fillet weld, which is used to test the focusing ability of the instrument and probe combination when detecting the fillet weld. Figure 5 As shown, area 3 is the area near the drilling hole, which is mainly used to test the detection capability of the fillet weld detection process for this area, and also to test the longitudinal resolution of the instrument and probe combination in this area, to ensure that the fillet weld detection solution can effectively find defects near the drilling area. Figure 6 As shown in the figure, area 4 is the welding area near the branch pipe, which is mainly used to test the defect detection ability of this area when the probe is placed directly on the weld for detection, as well as the lateral resolution of the instrument and probe combination in this area. Figure 7As shown, area 5 is mainly in the weld area and is mainly used to test the fan scanning acoustic beam coverage of the detection scheme, the angular resolution of the instrument and probe combination, and the measurement error of the fan scanning angle range.

[0063] Embodiment 2:

[0064] According to the specific specifications of the fillet weld pipe to be tested, a series of simulation test blocks with the same specifications but with a certain number of bent holes are designed for testing instrument performance and verifying the effect of defect detection in difficult areas. The bent holes are generally ф1mm in size, and can also be changed to other specifications according to the needs of instrument performance testing or detection process verification.

[0065] When it is necessary to change to other specifications, it is only necessary to replace the inner plug-in board 5 installed on the test board 4 with the required specifications, and then place the probe at the position of the branch pipe of the corner weld test block close to the weld to ensure that the curvature diameter of the probe matching wedge matches the diameter of the branch pipe of the corner weld verification test block. The placement position of the probe is exactly the same as the placement position of the probe in the detection process that needs to be verified. When verifying the performance of the instrument, by selecting different probes and using different settings in the instrument, the performance of the instrument and probe combination is tested. Consider the following parameters when selecting the probe: frequency, number of chips, and chip spacing. When verifying the performance of phased array ultrasonic imaging, consider the following parameters: the number of channels of the instrument, the number of excitation chips during phased array ultrasonic imaging, the angle range of sector scanning imaging, the angle step value during sector scanning imaging, the setting of the focusing mode (depth, sound path, projection), the selection of the full focus imaging mode (pulse reflection, serial), and the step value of the full focus imaging. After completing the selection of instruments and probes and related settings, place the probe at the corresponding position of the test block, observe the test results, and judge whether the test is passed by referring to the following criteria: 1. Observe whether the curved holes to be tested on the test block can be displayed on the ultrasonic instrument. If the test results cannot be displayed, they will be judged as failures; 2. Observe whether the above-mentioned curved holes can be displayed clearly and independently. When the display signals of the curved holes are connected together, the test results are judged as failures.

[0066] 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", "clockwise", "counterclockwise" 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, and do not indicate or imply 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 a limitation on the present invention.

[0067] 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 two or more, unless otherwise clearly and specifically defined.

[0068] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances; the preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and use the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fillet weld test block based on ultrasonic technology, characterized in that: It comprises a main test block (1), a first rotating fixed platform (2), a second rotating fixed platform (3), a test plate (4) and an inner plug-in plate (5); The main test block (1) is rectangular, and two corners are provided with arc-shaped chamfers; the first rotating fixed platform (2) passes through the upper half of the main test block (1), and the second rotating fixed platform (3) passes through the lower half of the main test block (1); the first rotating fixed platform (2) and the second rotating fixed platform (3) are both provided with fixing grooves (6); The test plate (4) is semicircular, and the test plate (4) is provided with first detection holes (7), and the first detection holes (7) are arranged in a semicircular shape; A fixing hole (8) is provided at one end of the test plate (4), and the fixing hole (8) has the same cross-sectional shape as the first rotating fixing platform (2) and the second rotating fixing platform (3); A fixing block (9) is welded in the fixing hole (8), and the fixing block (9) is used in conjunction with the fixing groove (6); The other end of the test plate (4) is provided with a limiting groove (10), the limiting groove (10) is an arc-shaped groove, and the limiting groove (10) is used in conjunction with the first rotating fixed platform (2) and the second rotating fixed platform (3); An embedded groove (11) is provided on one side of the test plate (4), an inner plug-in plate (5) is embedded in the embedded groove (11), a second detection hole (13) is provided on the inner plug-in plate (5), the second detection hole (13) is arranged corresponding to the first detection hole (7), and the diameter of the second detection hole (13) is smaller than that of the first detection hole (7); One end of the inner plug plate (5) is rotatably connected to a fixing button (14), and a pull-out plate (15) is rotatably connected between the fixing button (14) and the inner plug plate (5).

2. A fillet weld detection method for a fillet weld test block based on ultrasonic technology according to any one of claim 1, characterized in that: The fillet weld inspection process includes the following steps: Step 1: Place the probe on the branch pipe of the fillet weld test block close to the weld, ensuring that the curvature diameter of the probe's matching wedge matches the diameter of the branch pipe of the fillet weld verification test block; Step 2: During instrument performance verification, different probes are selected and different settings are used in the instrument to test the performance of the instrument and probe combination. Step 3: After completing the selection and setting of the instrument and probe, place the probe at the corresponding position of the test block and observe the test results; Step 4: Evaluate the test results.

3. The fillet weld detection method based on ultrasonic technology according to claim 2 is characterized in that: In step 1, the placement position of the probe is exactly the same as the placement position of the probe in the test process that needs to be verified.

4. The fillet weld detection method based on ultrasonic technology according to claim 2 is characterized in that: When selecting the probe in step 2, consider the following parameters: frequency, number of chips, and chip spacing; when verifying the performance of phased array ultrasonic imaging, consider the following parameters: the number of instrument channels, the number of excitation chips during phased array ultrasonic imaging, the angle range of sector scanning imaging, the angle step value during sector scanning imaging, the setting of the focusing method, the selection of the full focusing imaging mode, and the step value of the full focusing imaging.

5. The fillet weld detection method based on ultrasonic technology according to claim 2 is characterized in that: The specific evaluation in step 4 is: A1: Observe whether the curved hole to be tested on the test block can be displayed on the ultrasonic instrument. If the test result cannot be displayed, it will be judged as failure; A2: Observe whether the above-mentioned curved holes can be displayed clearly and independently. When the display signals of the curved holes are connected together, the test result is judged as failure.

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